CN105841432B - Sliding track mechanism and there is its refrigerator - Google Patents

Abstract

The present invention discloses a slide rail mechanism and a refrigerator with it. The slide rail mechanism includes two sets of slide rail assemblies, a synchronization mechanism and a motor assembly. Each slide rail assembly has an upper rail, a middle rail and a lower rail. The middle rail includes a second A connecting part, a second connecting part and a limiting part, the limiting part includes a first abutting surface that restricts the movement of the upper rail toward the lower rail and a second abutting surface that restricts the movement of the lower rail toward the upper rail; the synchronization mechanism includes a steering piece , a fixing piece and a tensioning piece, the tensioning piece is wound between the fixing pieces of the two slide rail assemblies through the steering piece; the motor assembly has a first connection end and a second connection end for winding or releasing the tensioning piece, The tension member is respectively wound and connected on the first connection end and the second connection end, and the motor assembly shrinks the tension member through one of the first connection end and the second connection end, and the other releases the tension member to make the tension member move. The limiting part of the present invention controls the distance between the upper rail and the lower rail through the limiting effect, and at the same time, the drawer can be automatically drawn and pulled.

Description

Slide rail mechanism and refrigerator with same

technical field

The invention relates to the field of household appliances, in particular to a slide rail mechanism and a refrigerator having the same.

Background technique

At present, the three-section slide rails on the market mainly have the following problems in practical application: First, noise is generated during use: the existing three-section slide rails use the upper rail to run first, and when the upper rail travel distance reaches the extreme, use the upper rail Contact and collide with the limit device of the middle rail, and pull out the middle rail; also use the limit device of the middle rail and the lower rail to contact and collide, to reach the distance that the middle rail is pulled to reach the pole; and the limit device is between the upper rail and the middle rail , The noise of "peddling, pedaling" is generated during the contact and collision between the middle rail and the lower rail, which brings high-frequency noise to the user. Secondly, left and right shaking occurs during use: the existing three-section slide rails are mostly used in pairs in practical applications, and the operation mode described above is adopted. At the same time, the transmission between the three-section slide rails uses several steel balls as the sliding device between the rails. ; Therefore, the three-section slide rails cannot be locked with each other, and there is reserved space for lifting and shrinking. In actual use, the force when pulling out and the direction of the running force of the slide rail are not on the center line of the slide rail, resulting in a pair of three-section slide rails. The surface of the device pulled out by the slide rail will appear one in front and one behind, and at any position after being pulled out, when the force on both sides of the hands is different, it will shake left and right, which will bring safety hazards to users.

The existing three-section slide rails on the market are affected by cost, standard process control and reliability. The gap distance between the upper rail and the lower rail is generally 2mm. In the prior art, such as our company’s patent application with the application number CN201410372586.4 as an example, a synchronous mechanism can be added to the three-section slide rails to realize the synchronous entry and exit of the slide rails on both sides. The steering part of the synchronous mechanism includes a base, The base must be installed on the middle rail and the entire synchronization mechanism can achieve the expected synchronous mute effect, that is to say, the base must be installed within a gap of 2mm. In addition, in order to ensure the strength of the base, the size of the connecting part between the base and the middle rail should not be too small, preferably set at a height of 1.8mm. In this way, the distance between the upper rail and the connecting part is approximately 0.1mm, and the distance between the lower rail and the connection part is also roughly 0.1mm. In practical application, with the increase in the number of times the three-section slide rail is used, the internal steel balls and the upper rail, lower rail, and middle rail are prone to wear, resulting in a gradual decrease in the gap distance between the upper rail and the lower rail. The distance between the rail and the connecting portion of the base is extremely small. At this time, the reduction of the gap distance may easily cause interference between the upper rail and/or the lower rail and the connecting portion of the base, or even jamming. Therefore, there are problems in the reliability of the three-section slide rail in the prior art.

In addition, manually opening and closing the drawer will cause poor user experience, and the user's manual opening and closing may easily damage the synchronization mechanism.

Contents of the invention

The object of the present invention is to provide a sliding rail mechanism and a refrigerator with the same.

In order to achieve one of the objectives of the above invention, an embodiment of the present invention provides a slide rail mechanism for pulling out or pushing a drawer in a box, including a first slide rail assembly and a second slide rail assembly oppositely arranged, each slide The rail assembly has an upper rail, a middle rail, and a lower rail that are slidably fitted with each other, and the middle rail includes a first connecting portion, a second connecting portion, and a limiting portion located between the first connecting portion and the second connecting portion , the first connecting portion cooperates with the upper rail, the second connecting portion cooperates with the lower rail, the limiting portion includes a first abutting surface and a second abutting surface oppositely arranged, the The first abutment surface restricts the upper rail from moving toward the lower rail, and the second abutment surface restricts the lower rail from moving toward the upper rail; the slide rail mechanism also includes making the first slide rail assembly and The synchronous mechanism and motor assembly for the synchronous movement of the second slide rail assembly. The synchronization mechanism includes a steering piece, a fixing piece, and a tension piece arranged on two sets of slide rail assemblies. The tension piece is wound around the two slide rails through the steering piece. between the fixing parts of the assembly, so that when the upper or middle rail of the first slide rail assembly moves, the tension member drives the upper or middle rail of the second slide rail assembly to displace the same distance in the same direction through the fixing; The motor assembly has a first connection end and a second connection end for winding or releasing the tension member, and the two parts of the tension member located on the front and rear sides of the same fixing member are respectively wound and connected to the first connection On the end and the second connection end, when the motor assembly works, one of the first connection end and the second connection end contracts the tension member, and the other releases the tension member so that the tension member move, and then drive the middle rail and the upper rail to move through the fixing piece.

As a further improvement of an embodiment of the present invention, the limiting part is a groove structure, the opening direction of the groove structure is away from the accommodating space of the drawer, and the outer contour of the groove structure is determined by the first The abutting surface, the second abutting surface and the mounting surface connecting the first abutting surface and the second abutting surface are enclosed.

As a further improvement of an embodiment of the present invention, the steering member is located on the installation surface.

As a further improvement of an embodiment of the present invention, the fixing member includes a first upper fixing member and a first lower fixing member arranged on the first slide rail assembly, and a second upper fixing member arranged on the second slide rail assembly The steering member includes a first front steering member and a first rear steering member located on the first slide rail assembly, a second front steering member and a second rear steering member located on the second slide rail assembly; the tensioning The member includes a first tension member passing through the first front steering member and connecting the first lower fixing member and the first upper fixing member, passing through the first rear steering member, the second rear steering member and the second front steering member in turn and connecting the first lower fixing member and the first upper fixing member. The first upper fixing part and the second tensioning part of the second upper fixing part pass through the second rear steering part and the first rear steering part in turn and connect the second upper fixing part and the third tensioning part of the first lower fixing part, The first connecting end and the second connecting end are respectively wound and connected with the first tensioning piece and the third tensioning piece at the front and rear sides of the first lower fixing piece.

As a further improvement of an embodiment of the present invention, the first lower fixing member has a first guide member and a second guide member respectively guiding the first tension member and the third tension member to the first connection end and the second connection end. guide.

As a further improvement in one embodiment of the present invention, the starting end of the tensioning member is connected to the first connecting end, and the end passes through the first guide member, the first front steering member, the first upper fixing member, and the first rear steering member in sequence. , the second rear steering piece, the second front steering piece, the second upper fixing piece, the second rear steering piece and the first rear steering piece, and the second guide piece are connected to the second connecting end.

As a further improvement of an embodiment of the present invention, the slide rail mechanism further includes a first bushing arranged between the first guide piece and the first connecting end, and the tension piece is between the first guide piece and the motor assembly. The part between is passed through the first bushing, and the length of the tension member between the first guide and the motor assembly is greater than the distance between the first guide and the motor assembly; the slide rail mechanism also It includes a second bush arranged between the second guide and the second connecting part, the part of the tension member between the second guide and the motor assembly passes through the second bush, and the The length of the tension member between the second guide member and the motor assembly is greater than the distance between the second guide member and the motor assembly.

As a further improvement of an embodiment of the present invention, the motor assembly includes a motor that can rotate forward and reverse, a transmission gear that adjusts the speed, and a winding drum that is driven to rotate by the transmission gear. The first connection end and the second connection end They are all arranged on the winding drum, and the two parts of the tension member located on the front and rear sides of the same fixing member are respectively wound on the first connection end and the second connection end in opposite directions.

As a further improvement of an embodiment of the present invention, the steering member includes a front steering member and a rear steering member fixed to the front and rear ends of each middle rail, and the fixing member includes an upper rail and a lower rail respectively arranged on the first slide rail assembly The first upper fixing piece and the first lower fixing piece, the second upper fixing piece and the second lower fixing piece respectively arranged on the upper rail and the lower rail of the second slide rail assembly, the tensioning piece includes two rear The steering part is connected to the first tensioning part of the first lower fixing part and the second upper fixing part, passes through two rear steering parts and connects the second tensioning part of the first upper fixing part and the second lower fixing part, and The motor assembly includes a first motor assembly and a second motor assembly respectively wound and connected to the first tension member and the second tension member, and the first motor assembly and the second motor assembly shrink or release the first tension member respectively and the second tensioning piece to make the tensioning piece move, and then drive the middle rail and the upper rail to move through the fixing piece.

In order to achieve one of the objectives of the above invention, an embodiment of the present invention provides a refrigerator, including the above-mentioned slide rail mechanism.

Compared with the prior art, the beneficial effect of the present invention is that: the middle rail of the present invention removes the part connected with the upper rail and the lower rail, and also includes a limiting part located in the middle, and the limiting part acts as a limiting function. Control the distance between the upper rail and the lower rail to prevent the distance between the upper rail and the lower rail from becoming too small. At the same time, through the mutual cooperation between the motor assembly and the synchronous mechanism, when the motor is working, it is connected to the motor The tensioning part moves, and then drives the middle rail and the upper rail to move through the fixing part, and the drawer realizes automatic pulling, which is convenient to use.

Description of drawings

Fig. 1 is a schematic diagram of an initial state of a slide rail mechanism according to an embodiment of the present invention;

Fig. 2 is an exploded view of a slide rail mechanism according to an embodiment of the present invention;

Fig. 3 is a longitudinal sectional view of a slide rail assembly according to an embodiment of the present invention;

Fig. 4 is a longitudinal sectional view of the middle rail according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the sliding state of the slide rail mechanism according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of the distribution of fixtures in a specific example of the present invention;

Fig. 7 is a schematic diagram of the distribution of fixtures in another specific example of the present invention;

8 and 9 are schematic diagrams of a slide rail mechanism with a motor assembly according to an embodiment of the present invention;

Fig. 10 and Fig. 11 are schematic diagrams of a slide rail mechanism with a motor assembly according to another embodiment of the present invention;

Fig. 12 is a longitudinal sectional view of a rear steering member according to an embodiment of the present invention;

Fig. 13 is a transverse sectional view of a rear steering gear according to an embodiment of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

As shown in FIG. 1 , the present invention provides a slide rail mechanism 100 for pulling out or pushing a drawer (not shown) in a box, including two sets of slide rail assemblies 1 oppositely arranged. Of course, the slide rail mechanism 100 can also be used for drawing, expanding or contracting other structures. It should be noted that two sets of slide rail assemblies 1 can be arranged left and right. In other embodiments, two sets of slide rail assemblies 1 can also be arranged up and down. In the present invention, two sets of slide rail assemblies 1 are arranged left and right as an example.

In addition, terms such as "upper", "upper", "lower", "below", "left", "right", etc. used herein to indicate relative positions in space are described for the purpose of description as shown in the accompanying drawings. The relationship of one element or feature shown to another element or feature. The terms of spatial relative position may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

1 and 2, the slide rail assembly 1 includes a first slide rail assembly 1a and a second slide rail assembly 1b, each slide rail assembly 1 has an upper rail 11, a middle rail 12 and a lower rail 13 that are slidably engaged with each other. , that is, the first slide rail assembly 1a has a first upper rail 11a, a first middle rail 12a, and a first lower rail 13a that cooperate with each other, and the second slide rail assembly 1b has a second upper rail 11b that cooperates with each other, a second The middle rail 12b and the second lower rail 13b. The lower rail 13 is fixed on the box body through angle irons (not marked), the upper rail 11 is fixed on the drawer, and the middle rail 12 is co-located between the upper rail 11 and the lower rail 13; , the lower rail 13 is fixed, the middle rail 12 and the upper rail 11 can be pulled out or pushed relative to the lower rail 13, and then drive the drawer to be pulled out or pushed into the box, that is to say, the lower rail 13 For track determination, the middle rail 12 and the upper rail 11 are moving rails.

In the first embodiment of the present invention, as shown in FIG. 3 and FIG. 4 , the middle rail 12 includes a first connecting portion 121, a second connecting portion 122, and The limiting part 123 in the middle of the part 122, the first connecting part 121 cooperates with the upper rail 11, the second connecting part 122 cooperates with the lower rail 13, and the limiting part 123 includes a second A resisting surface 1231 and a second resisting surface 1232, the first resisting surface 1231 restricts the upper rail 11 from moving toward the lower rail 13, and the second resisting surface 1232 restricts the lower rail 13 from moving toward The upper rail 11 moves.

Here, the limiting portion 123 controls the distance between the upper rail 11 and the lower rail 13 through the limiting effect, so as to prevent the distance between the upper rail 11 and the lower rail 13 from becoming too small and affect the sliding process. It should be noted that although the distance between the upper rail 11 and the lower rail 13 explained in the background of the application is too small, the problem is that the steering member base on the middle rail 12 is disturbed, thereby affecting the synchronization effect, but The slide rail assembly 1 of this embodiment is not limited to be used in synchronous slide rails. Further, the function of controlling the distance between the upper rail 11 and the lower rail 13 through the stopper 123 in this embodiment is not limited to ensuring that the middle rail 12 The base of the upper steering element is not disturbed. For example, this embodiment can also avoid the noise generated by the contact between the upper rail 11 and the lower rail 13, or this embodiment can effectively strengthen the strength of the middle rail 12 and so on.

Continuing to refer to Fig. 3 and Fig. 4, the limiting part 123 is a groove structure 123, and the opening direction of the groove structure 123 is away from the accommodating space of the drawer, that is to say, the first one on the right side at this time The longitudinal section of the groove structure 123 of the slide rail assembly 1a is in the shape of “[”, and the longitudinal section of the groove structure 123 of the second slide rail assembly 1b on the left is in the shape of “]”. The outer contour of the groove structure 123 consists of the first abutting surface 1231, the second abutting surface 1232 and the installation surface 1233 connecting the first abutting surface 1231 and the second abutting surface 1232 Enclosed, the installation surface 1233 is a surface close to the drawer accommodating space, and here, the outer contour refers to the contour of a side close to the drawer accommodating space. Preferably, the first abutting surface 1231 and the second abutting surface 1232 are parallel to each other, the mounting surface 1233 is perpendicular to the first abutting surface 1231 and the second abutting surface 1232, and the mounting surface 1233 is a vertical plane, In this way, the first abutting surface 1231 is perpendicular to the movement path of the upper rail 11 towards the lower rail 13, and the first abutting surface 1231 can preferably limit the movement of the upper rail 11. Similarly, the second abutting surface 1232 The second abutting surface 1232 can preferably limit the movement of the lower rail 13 and is perpendicular to the movement path of the lower rail 13 towards the upper rail 11 .

In this embodiment, in order to make the resisting effect of the limiting part 123 better, take the upper rail 11 as an example, the upper rail 11 is formed by sequentially connecting the first wall 111 , the second wall 112 and the third wall 113 , An opening 114 is formed between the first wall 111 and the third wall 113, and the opening 114 cooperates with the first connecting portion 121, that is to say, the cross section of the upper rail 11 is in the shape of the word "door". type, wherein the side of the first wall 111 away from the second wall 112 is formed with a hook portion 115 bent toward the third wall 113, when the upper rail 11 is fitted to the middle rail 12 , the hook portion 115 and the first abutting surface 1231 limit each other, and the surface-to-surface contact can effectively improve the limit effect. Of course, for the sake of reasonable design and beautiful appearance, the A side of the third wall 113 away from the second wall 112 may also form a hook portion 116 bent toward the first wall 111 . The structure of the lower rail 13 can be similar to the upper rail 11, but it can also be different, depending on the actual situation. In this embodiment, the structure of the lower rail 13 is the same as that of the upper rail 11. The opening direction is different.

In this embodiment, the slide rail assembly 1 further includes an upper row of balls 14 arranged between the upper rail 11 and the middle rail 12, and an upper row of balls 14 arranged between the middle rail 12 and the lower rail 13. The lower row of balls 15 between them can reduce friction and save labor when the upper rail 11 or the middle rail 12 is pulled out or advanced relative to the lower rail 13 . The upper row of balls 14 is located in the opening 114 of the upper rail 11 , and the lower row of balls 15 is located in an opening (not marked) of the lower rail 13 . Further, the upper row of balls 14 includes a base (not marked) fixed on the upper side of the middle rail 12 and a number of balls (not marked) arranged on the base, and the lower row of balls 15 includes a base fixed on the middle rail 12 12 The base body (not marked) on the lower side and some balls (not marked) arranged on the base body.

In this embodiment, the slide rail assembly 100 further includes a synchronization mechanism 2 , and the synchronization mechanism 2 includes a steering piece 21 , a fixing piece 22 , and a tensioning piece 23 arranged on two sets of slide rail assemblies 1 . The tension member 23 is sequentially wound and arranged (wrapped) between the several fixing members 22 of the two slide rail assemblies 1 through the steering member 21 and connected to the several fixing members 22, so that the upper rail 11 of the first slide rail assembly 1a Or when the middle rail 12 moves, the tension member 23 drives the upper rail 11 or the middle rail 12 of the second slide rail assembly 1b to displace the same distance in the same direction through the fixing member 22, so as to realize the synchronous movement of the two groups of slide rail assemblies 1, avoiding The phenomenon of deflection or swing caused by uneven force during the drawing process; and the drawer can be locked at any position during the drawing process, and the mute effect is good during the whole process.

The steering member 21 includes a front steering member 211 and a rear steering member 212 respectively arranged at the front and rear ends of each middle rail 12. The first front steering member 211a and the second front steering member 211b, the rear steering member 212 includes the first rear steering member 212a and the second rear steering member respectively arranged on the first slide rail assembly 1a and the second slide rail assembly 1b 212b.

In this embodiment, the front steering member 211 and the rear steering member 212 are both disposed on the mounting surface 1233 of the middle rail 12 . Here, due to the limiting effect of the limiting portion 123 , the deviation of the upper rail 11 and the lower rail 13 will not directly interfere with the steering member 21 on the middle rail 12 . In practice, in order to ensure the stability of the use process and the force strength of the limiting portion 123, preferably, the installation area of the installation surface 1233 can be increased.

Specifically, referring to FIG. 3 and FIG. 4 , the side of the first connecting portion 121 away from the limiting portion 123 has a first bending portion 1211 , and the side of the second connecting portion 122 away from the limiting portion 123 One side has a second bending part 1221, on the direction (vertical direction) of the upper rail 11 towards the lower rail 13, between the first bending part 1211 and the second bending part 1221 With a first distance 1, the mounting surface 1233 has a first height H, wherein the first height H=(first distance 1-2mm)/2, and it is ensured that the first height H is greater than 2 mm in the prior art, and also That is, at this time, the gap between the upper rail 11 and the lower rail 13 is enlarged. Here, the design of the first height H takes into account the stress on the middle rail 12 , the installation of the steering member 21 , and the cost. Such a design, on the one hand, can ensure that there is enough space to install the steering member 21, and the distance between the steering member 21 and the upper rail 11 and the lower rail 13 can also be appropriately increased, further ensuring that the upper rail 11, the lower rail 13 and the There is no interference between the steering elements 21; on the other hand, the stress on the middle rail 12 can be effectively distributed and released. It should be noted that the first connecting portion 121 in this embodiment is defined as the upper area of the limiting portion 123, and the first bending portion 1211 is defined as the upper area of the first connecting portion 121. Similarly, the second The connecting portion 122 is defined as the lower area of the limiting portion 123 , and the second bending portion 1221 is defined as the lower area of the second connecting portion 122 .

3 and 4, in a specific example, the mounting surface 1233 is perpendicular to the first abutting surface 1231 and the second abutting surface 1232, and the limiting portion 123 is vertically The outer edge of the longitudinal section is bounded by three straight lines of equal length. That is to say, there is a right-angle transition between the installation surface 1233 and the first abutment surface 1231 and the second abutment surface 1232 , and the first height H of the installation surface 1233 is equal to the depth D of the groove structure 123 . In another specific example, it is defined that there is a first distance H1 between the first bending portion 1211 and the first abutting surface 1231, and there is a second distance H2 between the second bending portion 1221 and the second abutting surface 1232, In this example, the first height H, the first distance H1 and the second distance H2 of the installation surface 1233 are set to be equal, that is, H=H1=H2. The above-mentioned designs are all for further improving the working stability and service life of the slide rail mechanism, and logical improvements made by those skilled in the art based on the above-mentioned specific examples of the present invention are included in the protection scope of the present invention.

In this embodiment, in order to improve the stability and sliding smoothness of the slide rail mechanism, the centers of gravity of the upper rail 11, the middle rail 12, and the lower rail 13 are set to be located on the same plane, and the slide rails During the sliding process of the mechanism 100, the centers of gravity of the upper rail 11, the middle rail 12, and the lower rail 13 are always on the same plane.

In the second embodiment of the present invention, referring to FIGS. 1-4 , for the convenience of description, the same structures of the second embodiment and the first embodiment use the same reference numerals. In this embodiment, the middle rail 12 includes a first connecting portion 121, a second connecting portion 122 and a limiting portion 123 for connecting the first connecting portion 121 and the second connecting portion 122, the The first connecting part 121 cooperates with the upper rail 11, the second connecting part 122 cooperates with the lower rail 13, and the limiting part 123 includes a mounting part 1233 close to the accommodating space of the drawer. There is a first interval S between the upper rail 11 and the lower rail 13, and the mounting portion 1233 has a first height H in the direction of the first interval S. When the upper rail 11 and the lower rail 13 are opposite When the middle rail 12 moves, the first interval S is always not less than the first height H.

Here, through the function of the stopper 123, the first distance S between the upper rail 11 and the lower rail 13 is always not less than the first height H of the installation surface 1233, avoiding the gap between the upper rail 11 and the lower rail 13. The gap between them becomes too small and affects the sliding process.

In this embodiment, the limiting part 123 is a groove structure 123, the opening direction of the groove structure 123 is away from the accommodating space of the drawer, and the outer contour of the groove structure 123 is supported by the first surface 1231, the second abutting surface 1232 and the mounting surface 1233 connecting the first abutting surface 1231 and the second abutting surface 1232, the first abutting surface 1231 is connected to the mounting surface 1233 and the first connecting portion 121, the first abutting surface 1231 restricts the movement of the upper rail 11 toward the lower rail 13, and the second abutting surface 1232 connects the installation surface 1233 and the first Two connecting portions 122 , the second abutting surface 1232 restricts the lower rail 13 from moving toward the upper rail 11 .

The slide rail mechanism 100 also includes a synchronous mechanism 2 that keeps the first slide rail assembly 1a and the second slide rail assembly 1b moving synchronously, and the synchronization mechanism 2 includes a steering member arranged on two sets of slide rail assemblies 21. The fixing piece 22 and the tensioning piece 23, the steering piece 21 is fixed on the installation surface 1233, the tensioning piece 23 is placed between the fixing pieces 22 of the two slide rail assemblies through the turning piece 21, When the upper rail 11a or the middle rail 12a of the first slide rail assembly 1a moves, the tension member 23 drives the upper rail 11b or the middle rail 12b of the second slide rail assembly 1b to displace the same distance in the same direction through the fixing member 22 .

It should be noted that for other descriptions of the second embodiment, reference may be made to the description of the above-mentioned first embodiment, and details are not repeated here.

In the third embodiment of the present invention, referring to FIGS. 1-4 , for the convenience of description, the same structures of the third embodiment and the first embodiment use the same reference numerals. In this embodiment, the middle rail 12 includes a first connecting portion 121, a second connecting portion 122 and a limiting portion 123 for connecting the first connecting portion 121 and the second connecting portion 122, the The first connecting part 121 cooperates with the upper rail 11, and the second connecting part 122 cooperates with the lower rail 13. The slide rail mechanism 100 also includes making the first slide rail assembly 1a and the second The slide rail assembly 1b maintains a synchronous mechanism 2 that moves synchronously. The synchronization mechanism 2 includes a steering piece 21, a fixing piece 22, and a tensioning piece 23 arranged on two groups of slide rail assemblies. Placed between the fixing pieces 22 of the two slide rail assemblies, so that when the upper rail 11a or the middle rail 12a of the first slide rail assembly 1a moves, the tensioning piece 23 drives the second slide rail assembly 1b through the fixing piece 22. The upper rail 11b or the middle rail 12b are displaced by the same distance in the same direction, wherein the steering member 21 is fixed at the limiting part 1233, and the limiting part 1233 limits the interference between the upper rail 11 and the lower rail 13 The steering member 21.

Here, the relative position of the upper rail 11 and the lower rail 13 is controlled by the limiting part 1233, so as to avoid the gap between the upper rail 11 and/or the lower rail 13 and the steering member 21 due to wear of the upper rail 11, the lower rail 13, and the middle rail 12. Interference occurs.

It should be noted that for other descriptions of the third embodiment, reference may be made to the description of the first embodiment above, and details are not repeated here.

5 and 6, the front turning member 211 of the present invention is configured such that the tensioning member 23 is divided into an upper tensioning member 231 and a lower tensioning member 232 after passing through the front turning member 211, and the rear turning member 212 includes an upper diversion member 2121 and a lower diversion member 2122 respectively matched with the upper tension member 231 and the lower tension member 232, and the upper tension member 231 and the lower tension member 232 pass through one of the slide rail assemblies 1 The upper steering piece 2121 and the lower steering piece 2122 respectively extend to the lower steering piece 2122 and the upper steering piece 2121 fixed on another slide rail assembly 1, and are respectively located on the upper rails of the two sets of slide rail assemblies 1 in a cross linkage manner. 11 with 13 on the lower rail.

The front steering member 211 is a wheel disc for the tension member 23 to bypass, and it is installed vertically, and the upper steering member 2121 and the lower steering member 2122 are wheel discs for the tension member 23 to bypass, and it is horizontal. Installation, the highest position of the tension member 23 on the front steering member 211 and the position of the tension member 23 on the upper steering member 2121 are located on the same straight line, so that the upper tension member 231 is parallel to the The middle rail 12; the tension member 23 is located at the lowest position of the front steering member 211 and the position of the lower steering member 2122 is located on a straight line parallel to the middle rail 12, so that the lower tension member 232 is parallel to the middle rail 12; thus making the slide rail mechanism 100 run smoothly.

The fixing part 22 includes two upper fixing parts 221 respectively disposed on the two upper rails 11 and at least one lower fixing part 222 disposed on at least one lower rail 13 .

During the opening, closing and opening or closing process of the slide rail assembly 1, the upper fixing member 221 is always located between the rear end of the upper rail 11 and the front end of the middle rail 12, and the lower fixing member 222 is always located at the front end of the middle rail 12. Between the front end of the lower rail 13 and the rear end of the middle rail 12, to avoid the separation of the three slide rails from each other, reduce the wear of the tension member 23 at the steering member 21 and the fixing member 22, and prolong the service life without affecting the slide rail The mechanism 100 can pull the drawer out the effective length of the case.

When the slide rail assembly 1 is fully opened, the rear portion of the upper rail 11 partially overlaps the front portion of the middle rail 12, and the rear portion of the middle rail 12 partially overlaps the front portion of the lower rail 13. overlap to enhance the stability of the slide rail assembly 1 in the open state and prevent the drawer from shaking. Preferably, the distance between the upper fixing member 221 and the rear end of the upper rail 11 is half of the distance from the rear end of the upper rail 11 to the front end of the middle rail 12 when the upper rail 11 and the middle rail 12 are fully opened; The distance between the part 222 and the front end of the lower rail 13 is half of the distance from the rear end of the lower rail 13 to the front end of the middle rail 12 when the lower rail 13 and the middle rail 12 are fully opened. The effective length of the box is drawn out, and the collision or friction between the steering member 21 and the fixing member 22 can be avoided, thereby prolonging the service life. When the slide rail assembly 1 is fully opened, assuming that the distance from the rear end of the upper rail 11 to the front end of the middle rail 12 is L, the distance between the upper fixing member 221 and the rear end of the upper rail 11 is L/2; The distance between the front end of the lower rail 13 is M, and the distance between the lower fixing part 222 and the front end of the lower rail 13 is M/2.

The tension member 23 is wound between the fixing members 22 of the two slide rail assemblies 1 through the front steering member 211 and the rear steering member 212 and forms a loop, that is, the tension member 23 passes through the front steering member 211 and the rear steering member 211 to form a loop. The direction of the member 212 is changed so as to connect the upper fixing member 221 and the lower fixing member 222 . In the present invention, forming a loop means: the two parts of the tension member 23 located at the front side and the rear side of the same fixing member 22 are tightly connected through the fixing member 22 without breakpoints; the tension member 23 is located at the same fixing member 22 The two parts of the front side and the rear side are fixed on the same slide rail, and there is no turning member 21 between the two fixed points.

In a specific example of the present invention, referring to FIG. 6, the fixing member 22 includes a first upper fixing member 221a and a first lower fixing member 222a arranged on the first slide rail assembly 1a, and a first lower fixing member 222a arranged on the second slide rail assembly 1b. The second upper fixing piece 221b on the top, the tensioning piece 23 is divided into three sections by three fixing pieces 22: the first front turning piece 211a and the first lower fixing piece 222a and the first upper fixing piece 221a are connected. The tensioning member passes through the first rear steering member 212a, the second rear steering member 212b and the second front steering member 211b in turn and connects the second tensioning member of the first upper fixing member 221a and the second upper fixing member 221b, sequentially The third tension member passes through the second rear steering member 212b and the first rear steering member 212a and connects the second upper fixing member 221b and the first lower fixing member 222a. The first tension member, the second tension member and the third tension member are connected to each other through the fixing member 22 to form a closed circuit.

In another specific example of the present invention, referring to FIG. 7, the same components as in the previous specific example use the same reference numerals, and the fixing member 22 includes a first upper fixing member 221a and a first upper fixing member 221a disposed on the first slide rail assembly 1a. The lower fixing part 222a, the second upper fixing part 221b and the second lower fixing part 222b are arranged on the second slide rail assembly 1b.

The tension member 23 includes a first tension member that passes through the first front steering member 211a and connects the first lower fixing member 222a and the first upper fixing member 221a, passes through the first rear steering member 212a, and the second rear steering member in turn. 212b and connects the second tension member of the first upper fixing member 221a and the second lower fixing member 222b, passes through the second front turning member 212a and is connected to the second lower fixing member 222b and the third sheet of the second upper fixing member 221b The tension member passes through the second rear steering member 212b and the first rear steering member 212a in turn and connects the second upper fixing member 221b with the first lower fixing member 222a. The first tension member, the second tension member, the third tension member and the fourth tension member are connected to each other through the fixing member 22 to form a closed circuit.

In one embodiment of the present invention, taking the tension member 23 as an example including a first tension member, a second tension member and a third tension member, as shown in FIG. 8 and FIG. 9 , the slide rail mechanism 100 also Including a motor assembly 3, the motor assembly 3 has a first connection end 31 and a second connection end 32 for winding or releasing the tension member 23, the tension member 23 is located on the front and rear sides of the same fixing member 22 The two parts are respectively wound and connected on the first connection end 31 and the second connection end 32, and the motor assembly 3 contracts the tension through one of the first connection end 31 and the second connection end 32 when it is in operation. 23, the other releases the tensioning piece 23 to make the tensioning piece 23 move, and then drives the middle rail 12 and the upper rail 11 to move through the fixing piece 22, and the drawer can be realized under the drive of the motor. Automatic pull, easy to use.

In this embodiment, the upper fixing member 221 includes an upper clamping member 2211 fastened on the upper rail 11 and a nut with a hole 2212 matched with the upper clamping member, and the upper layer tensioning member 231 passes through the It is fixed in the hole of the eyelet nut 2212. The lower fixing member 222 includes a lower clamping member 2221 fixed on the lower rail 13 and a first guide 2222 and a second guide 2223 arranged on the lower clamp 2221. The lower tension member 232 The motor assembly 3 is guided by the first guide member 2222 and the second guide member 2223 to fix the lower tension member 232 . In order to facilitate understanding of the structure of the lower fixing member 222 , the first guiding member 2222 and the second guiding member 2223 of the lower fixing member 222 do not move with the lower fixing member 2221 , but are still fixed with the tensioning member 23 . The hole of the nut with holes 2212 and the upper steering member 2121 are located on the same straight line parallel to the middle rail 12, and the first guide member 2222, the second guide member 2223, the lower clamping member 2221 and the lower steering member 2122 cooperate with each other. Located on the same straight line parallel to the middle rail 12 , the tension member 23 remains on the same straight line parallel to the middle rail 12 before and after the upper fixing member 221 and the lower fixing member 222 are fixed.

The slide rail mechanism 100 also includes a controller for controlling the operation of the motor assembly 3, and controls the operation of the motor assembly 3 when the controller receives a signal to pull out or push in the drawer. The motor assembly 3 includes a motor capable of forward and reverse rotation, a transmission gear driven by the motor and whose rotational speed can be adjusted, and a winding drum driven to rotate by the transmission gear. The first connecting end 31 and the second connecting end 31 are both arranged on the winding drum, and the two parts of the tensioning member 23 located on the front and rear sides of the same fixing member 22 are respectively wound on the said tensioning member 23 in opposite directions. On the first connection end 31 and the second connection end 32 . Therefore, when the reel rotates in one direction, one of the first connection end 31 and the second connection end 32 contracts the tension member 23 and the other releases the tension member 23 so that the The tension member 23 moves.

The first connecting end 31 and the second connecting end 32 are respectively wound and connected to the first tensioning element and the third tensioning element on the front and rear sides of the first lower fixing element 222a. The first lower fixing part 222a has a first guide part 2222 and a second guide part 2223 respectively guiding the first tension part and the third tension part to the first connection end 31 and the second connection end 32 . The slide rail mechanism 100 also includes a first bushing (not shown) disposed between the first guide piece 2222 and the first connection end 31 , and the tension member 23 is between the first guide piece 2222 and the motor assembly 3 . The part between is passed through the first bushing, and the length of the tension member 23 between the first guide member 2222 and the motor assembly 3 is greater than the distance between the first guide member 2222 and the motor assembly 3; The slide rail mechanism 100 also includes a second bushing (not marked) disposed between the second guide 2223 and the second connecting end 32, and the tension member is between the second guide 2223 and the motor assembly 3. Part of it passes through the second bushing, and the length of the tension member 23 between the second guide member 2223 and the motor assembly 3 is greater than the distance between the second guide member 2223 and the motor assembly 3 . Therefore, it is convenient to install the synchronous mechanism 2 and the motor assembly 3 in cooperation.

Certainly, the first tension member, the second tension member and the third tension member may be composed of one tension member 23 , two tension members 23 or three tension members 23 . In order to simplify the assembly process and reduce costs, a tension member 23 is used in this embodiment. The initial end of the tension member 23 is wound and connected to the first connecting end 31, and the end of the tension member 23 passes through the first guide member, the first front steering Part 211a, the first upper fixing part 221a, the first rear steering part 212a, the second rear steering part 212b, the second front steering part 211b, the second upper fixing part 221b, the second rear steering part 212b, the first rear steering part 212a and the second guide are connected to the second connection end 32 afterward.

When the motor rotates in the forward direction, the first tension member is wound on the winding drum, and the length of the winding is a, then the upper tension member 231 located in the first slide rail assembly is driven forward by a distance a, due to the first The distance between the front steering member 211a and the first rear steering member 212a is fixed, and the distance between the tension member 23 between the first front steering member 211a and the second rear steering member 212b is fixed, so the first The lower tension member 232 of the second slide rail assembly 1b transmits a distance a to the upper tension member 231 of the first slide rail assembly 1a through the second front steering member 211b, the second rear steering member 212b and the first rear steering member 212a; Because the distance between the second front steering member 211b and the second rear steering member 212b is fixed, the upper tension member 231 of the second slide rail assembly 1b transmits a distance a to the lower tension member 232, while the first slide rail The lower tension member 232 of the assembly 1a is transmitted to the upper tension member 231 of the second slide rail assembly 1b through the first front steering member 211a, the first rear steering member 212a, the second front steering member 211b, and the second rear steering member 212b The distance a, the length of the third tension member released from the winding drum is a.

The upper tension member 231 of the first slide rail assembly 1a is respectively fixed on the first upper rail 11a and the first lower rail 13a through the first upper fixing member 221a and the first lower fixing member 222a; the upper layer of the second slide rail assembly 1b The tension member 231 is fixed on the second upper rail 11b through the second upper fixing member 221b. At the same time, the lengths of the first tension member, the second tension member and the third tension member are all fixed. When the first tension member is wound to the winding drum for a length a, the upper layer tension member 231 of the first slide rail assembly 1a transmits a distance a to the lower floor tension member 232, and the upper rail 11 of the first slide rail assembly 1a is stressed toward Pull out the distance a; the lower tension member 232 of the second slide rail assembly 1b transmits the distance a to the upper tension member 231 of the first slide rail assembly 1a, and the upper tension member 231 of the second slide rail assembly 1b moves to the second The lower tension member 232 of the slide rail assembly 1b travels a distance a, so the second upper rail 11b is also pulled outward by a distance a. Simultaneously, the third tension member releases the distance a from the winding drum, and the refrigerator transmits the distance a to the upper tension member 231 of the second slide rail assembly 1b. Since the length of the third tension member is fixed, the second slide The middle rail 12a of the rail assembly is pulled forward.

Certainly, when the fixing member 22 further includes the second lower fixing member 222b disposed on the lower rail 13 of the second slide rail assembly 1b, the above-mentioned motor assembly 3 can also be matched.

In another embodiment of the present invention, taking the tension member 23 as an example including a first tension member, a second tension member, a third tension member and a fourth tension member, as shown in FIG. 10 and FIG. 11 , The motor assembly 3 includes a first motor assembly 33 that is wound and connected to the first tension member and the fourth tension member, and a second motor assembly 34 that is wound and connected to the third tension member and the second tension member. The first motor assembly 33 contracts or releases the first tension member and the fourth tension member respectively, and the second motor assembly 34 contracts or releases the third tension member and the second tension member respectively, so that the tension member 23 moves, and then drives the middle rail 12 and the upper rail 11 to move through the fixing member 22.

For the cooperation between the motor assembly 3 and the tension member 23 in this embodiment, reference may be made to the previous embodiment, and details will not be repeated here.

Further, in this embodiment, the synchronization mechanism 2 described in FIG. 12 and FIG. 13 also includes a tension sleeve 24 arranged between the two rear steering members 212, and at least one of the two rear steering members 212 An adjustment assembly 4 is provided, and the adjustment assembly 4 is movably connected with the tension sleeve 24. When the adjustment assembly 4 is in a tightened state, the tension sleeve 24 drives the tension member 23 away from the adjustment The assembly 4 moves until the length of the tension member 23 between the two rear steering members 212 is greater than the distance between the two rear steering members 212, and the tension member 23 is outside the tension sleeve 24 Part is always in a tensioned state, so that when the upper rail 11 or the middle rail 12 of the first slide rail assembly 1a moves, the tension member 23 drives the upper rail 11 or the middle rail 12 of the second slide rail assembly 1b through the fixing member 22 Displaced by the same distance in the same direction.

Here, compared with the embodiment without tension sleeve 24, the length of the tension member 23 between the two rear steering members 212 is greater than the distance between the two rear steering members 212; The other parts of the tension member 23 outside the tension sleeve 24 will loosen. In addition, in order to facilitate the installation of the tension member 23, a longer tension member 23 is generally provided. After the tension member 23 is assembled on the fixing member 22 and the steering member 21, the tension member 23 is easily in a relaxed state. The adjustment assembly 4 can be used to effectively adjust the tightness of other tension members 23 outside the tension sleeve 24, so that the other tension members 23 outside the tension sleeve 24 are always kept in a tight state, thereby improving synchronization and stability.

In a specific example of the present invention, the adjustment assembly 4 is installed in the rear steering member 212 of the second slide rail assembly 1b, and there is no adjustment assembly in the rear steering member of the first slide rail assembly 1a, of course, in other examples , in order to improve the adjustment range and adjustment convenience, the adjustment assembly 4 can also be provided in the two rear steering members 212 .

The rear steering member 212 is fixed to the rear end of the middle rail 12 through the base 213. On the side of the first slide rail assembly 1a, a fixed collar 25 is arranged between the tension sleeve 24 and the base 213 of the tension member 23. , the fixed collar 25 is perpendicular to the middle rail 12, and the part of the tension member 23 inside the fixed collar 25 is connected with the other part extending from the part behind the rear steering member 212 and close to the rear steering member 212. A part is vertical and located on the same plane, so that the tension member 23 can run smoothly during the opening or closing of the slide rail, saving effort; at the same time, it can reduce the movement of the tension member 23 around the rear steering member 212 Time wear and prolong life.

On the side of the second slide rail assembly 1b, as shown in FIG. The steering member 2121 is used to adjust the length of the tension member 23 passing through the upper steering member 2121, and the lower adjustment assembly 4b cooperates with the lower steering member 2122 to adjust the length of the tension member 23 passing through the lower steering member 2121. length. under. The structure of the adjustment assembly will be described in detail below with the adjustment assembly 4b as an example.

As shown in FIG. 13 , the base 213 has a first opening 2131 and a second opening 2132 that are perpendicular to each other and are connected. The end of the tensioning sleeve 24 is located at the second opening 2132 and passes through The tension member 23 in the tension sleeve 24 passes through the lower turning member 2122 from the second opening 2132 and extends to the first opening 2131 , and protrudes from the first opening 2131 to be fixed to the fixing member 22 . It should be noted that the first opening 2131 and the second opening 2132 of the upper adjusting component 4 a and the lower adjusting component 4 b can be mutually isolated openings to avoid cross-wiring.

Specifically, the adjustment assembly 4 includes a bolt 41 and a synchronous top spring 42 that drives the movement of the bolt 41, a first protrusion 2133 is formed on the base 213, the bolt 41 is a hollow structure, and A second convex portion 411 is formed on the inner wall of the latch member 41, and the first convex portion 2133 and the second convex portion 411 are surrounded to form an accommodation cavity (not marked), and the synchronous top spring 42 is just accommodated placed in the chamber. Here, the first convex portion 2133 and the second convex portion 411 are incompletely closed structures, and the tension member 23 can pass through the second convex portion 411, the first convex portion 2133, the lower turning member 2122 and extend to the first opening 2131 in sequence. place.

The synchronous top spring 42 has a first end 421 and a second end 422 oppositely disposed, the tension sleeve 24 has a first end 241 close to the synchronous top spring, and the first end 421 abuts against the The first protrusion 2133 , the second end 422 and the first end 241 abut against two sides of the second protrusion 411 respectively. Here, since the diameter of the tensioning sleeve 24 is greater than the diameter of the tensioning member 23, the diameter difference can be used to hold the tensioning sleeve 24 against the second protrusion 411, and the tensioning member 23 can just pass through the second protrusion 411 .

When the adjustment assembly 4 is in the initial state, the tension sleeve 24 is against the second protrusion 411 , so that the synchronous top spring 42 is limited in the accommodation cavity surrounded by the first protrusion 2133 and the second protrusion 411 Inside, the latch member 41 does not move.

When the adjusting assembly 4 is in the tightening state, the tensioning sleeve 24 drives the tensioning member 23 to move toward the direction A, and the tensioning sleeve 24 breaks away from the second convex portion 411. At the same time, the second convex portion 411 synchronizes with the top spring The active force of 42 also disappears. At this time, the synchronous top spring 42 can push the second convex part 411 to move toward the direction A, that is to say, at this time, the synchronous top spring 42 drives the latch 41 to move toward the direction A until the second convex part 411 moves again. Hold against the tension sleeve 24 . Through the above adjustment process, the tension member 23 on the left side of the tension sleeve 24 is pulled a certain distance in the direction A, and the length of the tension member 23 between the two rear steering members 212 is greater than that between the two rear steering members 212 That is to say, at this time, the excess length of the tensioning member 23 has been consumed, and the other parts of the tensioning member 23 outside the tensioning sleeve 24 are in a taut state.

In this embodiment, the synchronization mechanism 2 further includes an insertion piece 26, a plurality of slots 412 are formed on the outer wall of the latch 41, and at least one socket 2134 is formed on the base 213 corresponding to the slots 412, so The insertion piece 26 passes through the socket 2134 and is inserted into the slot 412 so that the latch 41 is relatively fixed to the base 213 . Here, when the length of the tension member 23 needs to be adjusted, the insertion piece 26 is pulled out, so that the latch member 41 can move relative to the base 213 , and when the adjustment is completed, the insertion piece 26 is inserted to fix the position of the latch member 41 .

In this embodiment, one end of the latch 41 also forms a limiting end 413, and a limiting surface 2135 that cooperates with the limiting end 413 is formed on the base 213. When the latch 41 moves to In the extreme position, the limiting end 413 moves toward the limiting surface 2135 until the limiting end 413 and the limiting surface 2135 interfere with each other. Here, the setting of the limiting surface 2135 and the limiting end 413 can, on the one hand, prevent the latch 41 from detaching from the base 213 during movement, and on the other hand, limit the movable range of the latch 41 .

The present invention also provides a refrigerator, including the above-mentioned slide rail mechanism 100 .

To sum up, in the slide rail mechanism 100 of the present invention, the tension member 23 is placed between the fixing members 22 of the two slide rail assemblies 1 through the steering member 21, and the tension member 23 cross-connects one of the slide rails The upper rail 11 and the lower rail 13 of another slide rail assembly 1, so that when the upper rail 11 or the middle rail 12 of the first slide rail assembly 1a moves, the tension member 23 drives the second slide rail assembly through the fixing member 22 The upper rail 11 or middle rail 12 of 1b is displaced by the same distance in the same direction to realize the synchronous movement of the two sets of slide rail assemblies 1, avoiding deflection or swinging caused by uneven force during the drawing process; Lock the drawer at any position during the process, and the mute effect is good during the whole process; the middle rail 12 includes a limit part 123, on the one hand, it can ensure the strength requirements of the entire slide rail mechanism, on the other hand, it can ensure that the steering piece can be moved during the sliding process. Not affected by the upper rail 11 and the lower rail 13; through the mutual cooperation of the motor assembly 3 and the synchronous mechanism 2, when the motor assembly 3 works, the tension member 23 connected to the motor assembly 3 moves, and then The fixing part 22 drives the middle rail 12 and the upper rail 11 to move to realize automatic drawer drawer, which is convenient to use; by setting the adjusting component 4, the tightness of the tensioning part 23 can be effectively adjusted to improve user experience.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims (10)

1. A slide rail mechanism, used for pulling out or advancing a drawer in a box body, comprising a first slide rail assembly and a second slide rail assembly oppositely arranged, each slide rail assembly has an upper rail and a middle rail that are slidably matched to each other and the lower rail, wherein the middle rail includes a first connecting portion, a second connecting portion, and a limiting portion located between the first connecting portion and the second connecting portion, and the first connecting portion and the second connecting portion The upper rail cooperates, the second connecting part cooperates with the lower rail, the limiting part includes a first abutting surface and a second abutting surface oppositely arranged, and the first abutting surface is arranged on the between the upper rail and the lower rail and restrict the movement of the upper rail toward the lower rail; the second abutment surface is arranged between the upper rail and the lower rail and restricts the direction The upper rail moves; the slide rail mechanism also includes a synchronous mechanism and a motor assembly that enable the first slide rail assembly and the second slide rail assembly to move synchronously. And the tension piece, the tension piece is wound between the fixing pieces of the two slide rail assemblies through the steering piece, so that when the upper rail or the middle rail of the first slide rail assembly moves, the tension piece passes through the fixing piece Drive the upper rail or the middle rail of the second slide rail assembly to displace the same distance in the same direction; the motor assembly has a first connection end and a second connection end for winding or releasing the tension member. The two parts located on the front and rear sides of the same fixing member are respectively wound and connected to the first connection end and the second connection end, and the motor assembly shrinks the motor assembly through one of the first connection end and the second connection end during operation. The tension member and the other one release the tension member to make the tension member move, and then drive the middle rail and the upper rail to move through the fixing member. 2. The slide rail mechanism according to claim 1, wherein the limiting portion is a groove structure, the opening direction of the groove structure deviates from the accommodating space of the drawer, and the opening direction of the groove structure is The outer contour is surrounded by the first abutting surface, the second abutting surface and a mounting surface connecting the first abutting surface and the second abutting surface. 3. The slide rail mechanism according to claim 2, wherein the turning member is located on the mounting surface. 4. The slide rail mechanism according to claim 1, wherein the fixing member comprises a first upper fixing member and a first lower fixing member arranged on the first slide rail assembly, and a first lower fixing member arranged on the second slide rail assembly The second upper fixing piece on the top; the steering piece includes the first front steering piece and the first rear steering piece arranged on the first slide rail assembly, the second front steering piece and the second rear steering piece arranged on the second slide rail assembly Steering piece; the tensioning piece includes a first tensioning piece that passes through the first front steering piece and connects the first lower fixing piece and the first upper fixing piece, passes through the first rear steering piece, the second rear steering piece and the first Two front steering parts and the second tensioning part connecting the first upper fixing part and the second upper fixing part, pass through the second rear steering part and the first rear steering part in turn and connect the second upper fixing part and the first lower fixing part The third tension member, the first connection end and the second connection end are respectively wound and connected to the first tension member and the third tension member on the front and rear sides of the first lower fixing member. 5. The slide rail mechanism according to claim 4, characterized in that: the first lower fixing member has a structure for respectively guiding the first tension member and the third tension member to the first connection end and the second connection end. a first guide and a second guide. 6. The slide rail mechanism according to claim 5, characterized in that: the initial end of the tension member is connected to the first connecting end, and the end passes through the first guide member, the first front steering member, the first upper fixed The first rear steering piece, the second rear steering piece, the second front steering piece, the second upper fixing piece, the second rear steering piece and the first rear steering piece, and the second guide piece are connected to the second connecting end. 7. The slide rail mechanism according to claim 5, characterized in that: the slide rail mechanism further comprises a first bushing arranged between the first guide piece and the first connecting end, the tension piece A part between a guide piece and the motor assembly passes through the first bushing, and the length of the tension member between the first guide piece and the motor assembly is greater than the distance between the first guide piece and the motor assembly The slide rail mechanism also includes a second bushing arranged between the second guide and the second connecting part, and the part of the tension member between the second guide and the motor assembly passes through the first The length of the tension member between the second guide member and the motor assembly is greater than the distance between the second guide member and the motor assembly. 8. The sliding rail mechanism according to claim 1, characterized in that: the motor assembly includes a motor that can rotate forward and reverse, a transmission gear that adjusts the speed, and a winding drum that is driven to rotate by the transmission gear, and the first The connecting end and the second connecting end are both arranged on the winding drum, and the two parts of the tensioning member located on the front and rear sides of the same fixing member are reversely wound on the first connecting end and the second connecting end respectively. serve. 9. The sliding rail mechanism according to claim 1, characterized in that: the steering member includes a front steering member and a rear steering member fixed on the front and rear ends of each middle rail, and the fixing members include The first upper fixing part and the first lower fixing part of the upper rail and the lower rail of the assembly, the second upper fixing part and the second lower fixing part respectively arranged on the upper rail and the lower rail of the second slide rail assembly, the tension The tensioning part includes a first tensioning part passing through two rear steering parts and connecting the first lower fixing part and the second upper fixing part, and a second tensioning part passing through the two rear turning parts and connecting the first upper fixing part and the second lower fixing part. Two tension members, the motor assembly includes a first motor assembly and a second motor assembly that are respectively wound and connected to the first tension member and the second tension member, and the first motor assembly and the second motor assembly shrink respectively Or release the first tensioning piece and the second tensioning piece to make the tensioning piece move, and then drive the middle rail and the upper rail to move through the fixing piece. 10. A refrigerator, characterized by comprising the sliding rail mechanism according to any one of claims 1-9.