CN118003173B - A three-disc combined floor grinding machine - Google Patents

Abstract

The invention provides a three-millstone combined floor grinding machine, which comprises: the rack is arranged in a extending mode along the front-back direction to form a front end portion, a middle portion and a rear end portion, the front end portion is movably provided with two brackets, the middle portion is provided with a containing cavity, and the rear end portion is used for being connected with a first travelling structure; the main grinding disc is rotationally arranged at the front end part; the two auxiliary grinding discs are respectively positioned at two sides of the main grinding disc and are rotatably arranged on the brackets in a one-to-one correspondence manner; each support is connected with an adjusting structure, so that the support is linked and corresponding to the auxiliary grinding disc under the action of external force, and the auxiliary grinding disc stays at one side of the main grinding disc to form an unfolding state, or is at least partially stored in the accommodating cavity to form a storage state after being lifted upwards. The invention solves the technical problems of long grinding time, low efficiency and poor universality in the prior art.

Description

A three-disc combined floor grinding machine

Technical Field

The invention relates to the technical field of floor grinding, and in particular to a three-grinding-disk combined floor grinding machine.

Background technique

Floor grinders are mainly used for grinding the floor. They can effectively grind terrazzo, concrete surface, epoxy mortar layer and old epoxy floor, etc. Existing floor grinders are usually divided into two types: single-head grinding disc and three-head grinding disc. Although the single-head grinding disc can be linked by gears to grind multiple grinding heads synchronously, there are still problems such as small grinding area, long grinding time and low efficiency. The three-head grinding disc is only suitable for large-area grinding operations, not for narrow spaces, and cannot move flexibly, which has limitations.

Summary of the invention

In view of the deficiencies in the prior art, the present invention provides a three-grinding disc combined floor grinding machine, which solves the technical problems of long grinding time, low efficiency and poor versatility in the prior art.

To achieve the above object, the present invention provides a three-grinding disc combined floor grinding machine, comprising:

A frame, the frame is extended in the front and rear directions to form a front end, a middle part and a rear end, the front end is movably provided with two brackets, the middle part is provided with a receiving cavity, and the rear end is used to connect with the first walking structure;

A main grinding disc, the main grinding disc being rotatably disposed at the front end portion;

Two auxiliary grinding discs, the two auxiliary grinding discs are respectively located on both sides of the main grinding disc and are rotatably arranged on each of the brackets in a one-to-one correspondence;

Wherein, each of the brackets is connected with an adjustment structure, so that under the action of external force, the bracket links with the corresponding auxiliary grinding disc to stay on one side of the main grinding disc to form an expanded state, or is lifted upward and at least partially stored in the accommodating cavity to form a stored state;

The regulating structure comprises:

A slide rail, the slide rail is spirally extended in the up-down direction and arranged in the middle part, and two ends of the slide rail are defined as a high end and a low end respectively;

A pulley, the pulley being rotatably disposed on the slide rail;

Two mounting sleeves, the two mounting sleeves are arranged at intervals in the middle portion along the up-down direction and are located on the inner side of the slide rail;

A rotating shaft, wherein the rotating shaft is gap-pierced through the two mounting sleeves, and the bracket and the pulley are both connected to the rotating shaft;

In the unfolded state, the pulley is located at the lower end of the slide rail;

In the storage state, the pulley is located at the high end of the slide rail.

Optionally, an opening is formed between the high end and the low end of the slide rail, and the opening is arranged toward the front end portion.

Optionally, a plane perpendicular to the axis of the rotating shaft is defined as a reference plane, and projections of any two points of the slide rail from the lower end to the upper end of the slide rail on the reference plane do not overlap.

Optionally, the lower end and/or the upper end of the slide rail is provided with an inclined section and a straight section connected in sequence, and the inclined section is located between the slide rail and the straight section.

Optionally, the bracket is connected to the rotating shaft via a first connecting rod, which is used to link the rotating shaft to rotate forward and reverse in the mounting sleeve;

The pulley is connected to the rotating shaft via a second connecting rod, which is used to drive the rotating shaft to move back and forth in the installation sleeve in an up-and-down direction, so as to link the bracket to be lifted upward or sunk downward.

Optionally, a positioning structure is provided at the high end and/or the low end of the slide rail, and the positioning structure includes a plurality of first positioning holes provided at the front end portion and/or the middle portion, and a plurality of second positioning holes provided at the bracket, and in the expanded state and/or the stored state, the first positioning holes correspond one-to-one to the second positioning holes and are fixed by plug-ins.

Optionally, the plug-in includes a detachably connected fixing pin and an R-shaped plug, the fixing pin is passed through the first positioning hole and the second positioning hole, and the R-shaped plug is vertically passed through the fixing pin for abutting the front end portion, the middle portion or the bracket.

Optionally, the auxiliary grinding disc is covered with a dustproof shell, and a compensation structure is provided between the dustproof shell and the bracket, the compensation structure includes a fixed ear provided on the bracket, and a floating ear provided on the dustproof shell, and the floating ear floats on the fixed ear at a short frequency.

Optionally, the front end portion is provided with a second walking structure.

Optionally, the main grinding disc and the two auxiliary grinding discs are driven by motors that are independently arranged.

In the technical solution of the present invention:

1. The main grinding disc is arranged at the front end of the frame, and the two auxiliary grinding discs are arranged on both sides of the main grinding disc through two brackets to form a combined three-grinding disc structure; and the front end of the frame is connected to the first walking structure through the middle and the rear end thereof, thereby forming an overall frame structure of the floor grinding machine, and then during the movement of the first walking structure, each grinding disc can be pushed forward to achieve grinding of the ground; furthermore, the synchronous cooperation of the three grinding discs increases the grinding area and improves the grinding efficiency;

2. In addition, each bracket is connected with an adjustment structure, which is used to adjust the position change of the corresponding auxiliary grinding disc under the action of external force, so that it forms an expanded state located on one side of the main grinding disc, or a stored state after being lifted upward and stored in the accommodating chamber; in the expanded state, it can cooperate with the main grinding disc, so that it is suitable for grinding on barrier-free or spacious ground, and the grinding time is shortened and the grinding efficiency is improved by increasing the grinding area; in the stored state, the main grinding disc can be used independently without occupying the grinding area of the main grinding disc, and it is suitable for narrow space; at the same time, the stored auxiliary grinding disc can form a height difference with the main grinding disc and the ground after being lifted, so as to prevent resistance from being formed relative to the main grinding disc when not in use; furthermore, the two auxiliary grinding discs are relatively independent of each other, and a reasonable position state can be selected according to actual needs, thereby improving the versatility of the grinder;

3. External force pushes the bracket to make the corresponding auxiliary grinding disc rotate with it, so that the shaft is linked to rotate in the installation sleeve. During this process, the pulley can continuously roll from the lower end of the slide rail to the higher end, playing a guiding role; as the pulley continues to climb in the spiral slide rail, the shaft moves upward to lift the bracket and the auxiliary grinding disc, and then the bracket and the auxiliary grinding disc are rotated to the accommodating cavity in the middle for folding and storage; not only the internal space formed by the frame is reasonably utilized, which is convenient for adding or reducing the corresponding auxiliary grinding disc according to actual needs, but also the auxiliary grinding disc can be lifted to a certain height and then suspended on the ground, thereby reducing the wear on the auxiliary grinding disc in a narrow space.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

FIG1 is a schematic structural diagram of a floor grinding machine in one embodiment of the present invention;

FIG2 is a partial enlarged view of point A in FIG1;

FIG3 is a bottom view of the main grinding disc and the auxiliary grinding disc in one embodiment of the present invention;

FIG4 is a schematic structural diagram of a positioning structure in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a compensation structure in an embodiment of the present invention.

In the figure:

1. Front end; 2. Middle part; 201. Accommodating chamber; 3. Rear end; 4. Bracket; 5. First walking structure; 6. Second walking structure; 7. Main grinding disc; 8. Auxiliary grinding disc; 9. Adjustment structure; 901. Slide rail; 902. Pulley; 903. Mounting sleeve; 904. Rotating shaft; 905. First connecting rod; 906. Second connecting rod; 10. Inclined section; 11. Straight section; 12. First positioning hole; 13. Second positioning hole; 14. Fixing pin; 15. R-type latch; 16. Dustproof housing; 17. Fixed lifting ear; 18. Floating lifting ear; 19. Motor.

The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings.

Detailed ways

It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

The present invention will be further described below with reference to Figures 1-5.

In an embodiment of the present invention, as shown in FIG. 1-2, the three-grinding disc combined floor grinding machine comprises a frame, a main grinding disc 7, two auxiliary grinding discs 8 and an adjusting structure 9; the frame is extended in the front and rear directions to form a front end 1, a middle part 2 and a rear end 3, the front end 1 is movably provided with two brackets 4, the middle part 2 is provided with a receiving cavity 201, and the rear end 3 is used to connect the first walking structure 5; the main grinding disc 7 is rotatably provided at the front end 1; the two auxiliary grinding discs 8 are respectively located on both sides of the main grinding disc 7, and are rotatably provided on each bracket 4 in a one-to-one corresponding manner;

Each bracket 4 is connected to an adjustment structure 9, so that under the action of external force, the bracket 4 is linked to the corresponding auxiliary grinding disc 8 to stay on one side of the main grinding disc 7 to form an expanded state, or to be lifted upward and at least partially stored in the accommodating cavity 201 to form a stored state;

The adjustment structure 9 includes a slide rail 901, a pulley 902, two mounting sleeves 903 and a rotating shaft 904; the slide rail 901 is spirally extended in the up-down direction and is arranged in the middle part 2, and the two ends of the slide rail 901 are defined as a high end and a low end respectively; the pulley 902 is rotatably arranged on the slide rail 901; the two mounting sleeves 903 are spaced in the up-down direction and are located on the inner side of the slide rail 901; the rotating shaft 904 is interspaced and penetrates the two mounting sleeves 903, and the bracket 4 and the pulley 902 are connected to the rotating shaft 904;

In the unfolded state, the pulley 902 is located at the lower end of the slide rail 901;

In the stored state, the pulley 902 is located at the high end of the slide rail 901 .

Specifically, in the embodiment of the present invention, the frame is extended in the front-back direction to be divided into a front end portion 1, a middle portion 2 and a rear end portion 3 of the frame. A cavity is provided in the middle of the front end portion 1 for mounting the main grinding disc 7, and a bracket 4 is provided on both sides thereof for mounting the auxiliary grinding disc 8, that is, along the left-right direction, the two auxiliary grinding discs 8 are respectively located on the left and right sides of the main grinding disc 7; the middle portion 2 of the frame is used to connect the front end portion 1 and the rear end portion 3 thereof, and an accommodating cavity 201 is provided therein for avoiding the bracket 4 and the auxiliary grinding disc 8 (of course, the middle portion 2 is also provided therein). Two accommodating chambers 201 may be provided, and the two accommodating chambers 201 correspond to and cooperate with the two grinding discs 8 respectively, and the size and shape of the accommodating chambers 201 may be determined according to the specific structural shape of the grinding discs 8; or, in order to improve the connection strength between the front end 1 and the rear end 3, a plurality of reinforcing ribs may be provided in the middle part 2, and the reinforcing ribs are reasonably arranged to form the above-mentioned accommodating chambers 201, and no excessive restrictions are made here); the rear end 3 is used to connect the first walking structure 5, so as to push each grinding disc forward or backward through the first walking structure 5. The main frame of the grinder is formed by installing the main components after a reasonable layout of the frame; thereby, during the movement of the first walking structure 5, the three grinding discs can grind the ground at the same time, so as to improve the grinding efficiency of the grinder by increasing the grinding area.

Specifically, as shown in FIG1 , the first walking structure 5 includes a box body and a plurality of first walking wheels arranged at the bottom of the box body; of course, a large amount of dust will be generated during the grinding process, so a dust collecting tower can be arranged in the box body, and the dust collecting tower is connected to each grinding disc through a dust suction pipe. As shown in FIG3 , the main grinding disc 7 and the auxiliary grinding disc 8 each include three rotatable grinding heads, which can ensure stable grinding on the same horizontal plane and ensure uniform grinding effect.

In the embodiment of the present invention, the bracket 4 is movably arranged and connected with an adjusting structure 9, which is used to change the position state of the bracket 4 and the corresponding auxiliary grinding disc 8 in the process of the bracket 4 being pushed by an external force, so that the two are in an expanded state where they stay on one side of the main grinding disc 7, or in a stored state where they are at least partially stored in the accommodating chamber 201 after being lifted upward. In the expanded state, the main grinding disc 7 and the auxiliary grinding disc 8 grind synchronously, which is suitable for grinding on barrier-free or spacious floors; on the contrary, in the stored state, only the main grinding disc 7 is in operation, and the auxiliary grinding disc 8 is in a standby state, which is suitable for grinding on the floor in a narrow space; by setting The position of the auxiliary grinding disc 8 can be changed by setting an adjusting structure 9, so that the auxiliary grinding disc 8 can be increased or decreased according to actual needs, thereby improving the versatility of the grinder; that is, the combined grinding disc is suitable for grinding a large area, and the single main grinding disc 7 is suitable for grinding corner areas; according to the actual needs of the site, the middle main grinding disc 7 can be retained, or an auxiliary grinding disc 8 can be quickly installed on either side to form a double grinding disc structure; even an auxiliary grinding disc 8 can be installed on each side to form a three-grinding disc structure; the flexible combination method meets the needs of different scenarios and improves the practicality and adaptability of the grinder.

Specifically, as shown in FIG. 2 , the adjustment structure 9 includes a matching slide rail 901 and a pulley 902, as well as a mounting sleeve 903 and a rotating shaft 904 with clearance fit. The slide rail 901 is spirally extended in the up-down direction to form a preset reciprocating moving path. The slide rail 901 is formed with two ends, and the end located at the top is defined as its high end, and the end located at the bottom is defined as its low end. The moving path direction from the low end of the slide rail 901 to its high end is in the form of a rotating gradual rise; conversely, the moving path direction from the high end of the slide rail 901 to its low end is in the form of a rotating gradual rise. , in the form of gradual settling by rotation; when the pulley 902 rolls on the slide rail 901, it can be guided by the above-mentioned moving path to form two modes of upward lifting and downward settling; in order to make the bracket 4 and the auxiliary grinding disc 8 continuously rotate and lift (or settle) under the action of external force, so that the two can switch between the unfolded state and the stored state, two mounting sleeves 903 are fixed at intervals along the upper and lower directions in the middle part 2, and the rotating shaft 904 is arranged along the upper and lower directions, and the gaps at both ends thereof are penetrated in the corresponding mounting sleeves 903, so that the rotating shaft 904 can be inside the mounting sleeves 903 The corresponding bracket 4, pulley 902 and rotating shaft 904 are connected; in this way, when the unfolded state is switched to the stored state, the external force pushes the bracket 4 to move in the direction of the middle part 2. Since the bracket 4 is connected to the rotating shaft 904, the rotating shaft 904 can rotate in the installation sleeve 903, and since the rotating shaft 904 is connected to the pulley 902, the pulley 902 can be linked to roll on the slide rail 901. As the pulley 902 is continuously lifted, the rotating shaft 904 can move upward, so that the pulley 902 02 When it reaches the high end of the slide rail 901, the auxiliary grinding disc 8 is suspended on the ground and stored in the accommodating chamber 201; similarly, in the process of switching from the stored state to the deployed state, the external force pushes the bracket 4 to move in the direction of the front end 1, and the pulley 902 rolls from the high end of the slide rail 901 to its low end, thereby resetting the bracket 4 and the auxiliary grinding disc 8; through the above operation, the auxiliary grinding disc 8 can be quickly deployed or stored, so that the auxiliary grinding disc 8 can be increased or decreased according to the needs of the usage scenario, so that the present grinder is not only suitable for large-area rapid grinding, but also can be used for uniform-speed grinding in narrow spaces.

Since the rotating shaft 904 needs to rotate and move up and down during the switching process between the two states, two connecting shafts are integrally formed at both ends of the rotating shaft 904, as shown in Figure 2, and the connecting shaft is clearance-matched with the corresponding mounting sleeve 903. When the pulley 902 is located at the lower end of the slide rail 901, the upper connecting shaft portion is exposed outside the mounting sleeve 903. As the rotating shaft 904 rotates and the pulley 902 continues to climb, the upper connecting shaft is gradually hidden in the mounting sleeve 903, and the lower connecting shaft is gradually exposed outside the corresponding mounting sleeve 903; the diameter of the connecting shaft is smaller than the diameter of the rotating shaft 904, so a step surface is formed at the connection between the two, and the step surface can control the length of the rotating shaft 904 moving up and down, that is, when the step surface abuts against the corresponding mounting sleeve 903, the rotating shaft 904 stops rotating, and the above length should be positively correlated with the path of the slide rail 901.

Of course, since the structure and shape of the accommodating cavity 201 described above are variable, in order to more reasonably adapt to the corresponding accommodating cavity 201, the position structure, shape and size of the main grinding disc 7 and each auxiliary grinding disc 8 can be adaptively adjusted along with the accommodating cavity 201; for example: the main grinding disc 7 is located in the middle of the front end of the two auxiliary grinding discs 8, and the three are constructed into a "品" shape structure; and/or the main grinding disc 7 is larger than the auxiliary grinding disc 8 (that is, the auxiliary grinding disc 8 = 1/2 main grinding disc 7), which also facilitates the auxiliary grinding disc 8 to rotate into place and be completely received in the accommodating cavity 201 to prevent the formation of grinding dead angles. The above descriptions of the size and position of each grinding disc can be adjusted according to actual needs and are not limited here.

The present invention changes the position of the auxiliary grinding disc 8 through the cooperation of the bracket 4 and the adjustment structure 9, so that it forms an expanded state and a stored state, so as to facilitate selective adjustment for different usage scenarios, thereby improving the versatility of the grinder; and, through the spiral slide rail 901, the auxiliary grinding disc 8 can be lifted or lowered while changing its position, without the need to be completed in steps, and the operation is simpler.

As shown in FIG2 , in one embodiment, an opening is formed between the high end and the low end of the slide rail 901, and the opening is arranged toward the front end portion 1. Specifically, in order to define the movement path of the bracket 4 and the auxiliary grinding disc 8, this embodiment provides an opening at the slide rail 901, which is formed by the high end and the low end of the slide rail 901, and the opening is arranged toward the front end portion 1; in this way, during the movement of the bracket 4 and the auxiliary grinding disc 8, they can be switched from the unfolded state to the retracted state from the high end direction through the low end of the slide rail 901, and in both states, they will not collide with the main grinding disc 7 or the frame, etc., to avoid the generation of movement dead angles; and after defining the direction of the slide rail 901, the bracket 4 and the auxiliary grinding disc 8 can move more smoothly.

Furthermore, in one embodiment, a plane perpendicular to the axis of the rotating shaft 904 is defined as a reference plane, and the projections of any two points of the sliding rail 901 on the reference plane do not overlap from the lower end to the higher end of the sliding rail 901. Specifically, in order to further define the direction of the sliding rail 901, this embodiment defines a plane perpendicular to the axis of the rotating shaft 904 as a reference plane, which is a plane, and the sliding rail 901 can be projected on the reference plane, and defines that the projections of any two points of the sliding rail 901 on the reference plane do not overlap, so that the sliding rail 901 is a semi-enclosed structure, which is convenient for guiding the bracket 4 and the auxiliary grinding disc 8 to the unfolded state or the stored state.

As shown in FIG. 2 , in one embodiment, the lower end of the slide rail 901 is provided with an inclined section 10 and a straight section 11 connected in sequence, and the inclined section 10 is located between the slide rail 901 and the straight section 11 . Specifically, in order to enable the pulley 902 to stay at the lower end of the slide rail 901 and to gradually slide to the high end of the slide rail 901 under the action of external force, an inclined section 10 and a straight section 11 connected in sequence are provided at the lower end of the slide rail 901, the straight section 11 is connected to the bottom of the inclined section 10, and the lower end of the slide rail 901 is connected to the top of the inclined section 10; in this way, the pulley 902 can roll to the straight section 11 after being guided by the inclined section 10, and can stay in the straight section 11 after the external force disappears. At this time, the bracket 4 and the auxiliary grinding disc 8 are in the expanded state, and the bracket 4 and the auxiliary grinding disc 8 are indirectly positioned in the expanded state; when an external force acts on the bracket 4, the pulley 902 can slide into the lower end of the slide rail 901 through the inclined section 10 under the action of the external force, and gradually slide into its high end. In this process, the pulley 902 can smoothly transition through the inclined section 10, and can push the bracket 4 and the auxiliary grinding disc 8 to gradually correspond to the state with a smaller external force.

It can be understood that, although the inclined section 10 and the straight section 11 are only arranged at the lower end of the slide rail 901 in the present embodiment, in other embodiments, the inclined section 10 and the straight section 11 can also be arranged at the high end of the slide rail 901, the straight section is connected to the top of the inclined section, and the high end of the slide rail is connected to the bottom of the inclined section; similarly, the straight section is used to position the pulley 902 to prevent it from automatically sliding into the slide rail after the external force disappears; the inclined section is used to guide the pulley 902 to move back and forth between the straight section and the high end of the slide rail under the action of external force, so that the bracket 4 and the auxiliary grinding disc 8 gradually enter the corresponding state.

As shown in Figure 2, in one embodiment, the bracket 4 is connected to the rotating shaft 904 through a first connecting rod 905, which is used to link the rotating shaft 904 to rotate forward and reverse in the mounting sleeve 903; the pulley 902 is connected to the rotating shaft 904 through a second connecting rod 906, which is used to drive the rotating shaft 904 to move back and forth in the mounting sleeve 903 in the up and down directions, so as to link the bracket 4 to be lifted upward or sunk downward. Specifically, in order to connect the rotating shaft 904 to the bracket 4 and the pulley 902 respectively, the present embodiment makes corresponding changes in the current position of the corresponding components by setting the first connecting rod 905 and the second connecting rod 906; one end of the above-mentioned first connecting rod 905 forms an annular structure for being arranged around the rotating shaft 904, and the other end thereof is connected to the bracket 4, so that when the external force pushes the bracket 4 to move toward the middle part 2, the rotating shaft 904 is linked to rotate through the first connecting rod 905; one end of the above-mentioned second connecting rod 906 also forms an annular structure for being arranged around the rotating shaft 904, and the other end thereof is connected to the pulley 902, so that when the rotating shaft 904 rotates, the pulley 902 is driven to roll on the slide rail 901 through the second connecting rod 906, and the rotating shaft 904 is gradually lifted or lowered; the first connecting rod 905 and the second connecting rod 906 are arranged at intervals for mutual avoidance; of course, the first connecting rod 905 and/or the second connecting rod 906 may not be linear, and they can be adaptively adjusted according to the structure of the frame or other components.

As shown in FIG4 , in one embodiment, a positioning structure is provided at the lower end of the slide rail 901, and the positioning structure includes a plurality of first positioning holes 12 provided at the front end portion 1, and a plurality of second positioning holes 13 provided at the bracket 4. In the unfolded state, the first positioning holes 12 correspond to the second positioning holes 13 one by one, and are fixed by a plug-in. Specifically, during the grinding process, since the main grinding disc 7 and/or the auxiliary grinding disc 8 may bounce, and the bounce may cause the bracket 4 to move to different degrees, in order to improve the stability of the bracket 4 and the auxiliary grinding disc 8 in the unfolded state, the present embodiment provides a positioning structure at the lower end of the slide rail 901, which is used to fix the bracket 4 to the front end portion 1, so that each grinding disc resonates at the same frequency; the positioning structure includes a first positioning hole 12 formed at the front end portion 1, and a second positioning hole 13 formed at the bracket 4. In the unfolded state, the first positioning hole 12 and the second positioning hole 13 are connected and penetrated by the plug-in to realize the relative fixation of the front end portion 1 and the bracket 4.

Specifically, in order to avoid the situation where the position setting of each positioning hole causes the bracket 4 to be unable to detach from the front end portion 1 or be fixed to the front end portion 1, the present embodiment is provided with a notch at the front end portion 1, and a socket is provided at one end of the bracket 4 close to the front end portion 1 for being inserted into the notch, and the front end portion 1 and the bracket 4 are connected in a plug-in manner, and the first positioning hole 12 and the second positioning hole 13 are formed at the notch and the socket, respectively. In addition, in order to quickly connect or detach the front end portion 1 and the bracket 4, chamfering can be performed at the corresponding position, and since the chamfer is set at an angle, it can avoid various components in the rotation process. Of course, the number of the first positioning hole 12 and the second positioning hole 13 can be multiple, so that multiple plug-ins can pass through and lock, thereby improving the connection strength between the front end portion 1 and the bracket 4. In other embodiments, the above-mentioned positioning structure can also be provided at the high end of the slide rail 901 to lock the bracket 4 and the auxiliary grinding disc 8 in the storage state; at the same time, when both the high end and the low end of the slide rail 901 are provided with positioning structures, the plug-ins at the two places can be used alternately, which can not only lock the bracket 4 and the auxiliary grinding disc 8 in the corresponding state, but also the plug-ins are only locked in the current state, and only one set of plug-ins can be used throughout the process to avoid loss of plug-ins.

Further, in one embodiment, the plug-in includes a detachably connected fixing pin 14 and an R-type plug 15, the fixing pin 14 is inserted into the first positioning hole 12 and the second positioning hole 13, and the R-type plug 15 is vertically inserted into the fixing pin 14, and is used to abut the front end portion 1 or the bracket 4. Specifically, in order to achieve the detachable connection between the front end portion 1 and the bracket 4, this embodiment defines that the plug-in includes a fixing pin 14 and an R-type plug 15, the fixing pin 14 is used to axially penetrate the first positioning hole 12 and the second positioning hole 13 to relatively fix the front end portion 1 and the bracket 4; and in order to prevent the fixing pin 14 from retreating in a natural state, the R-type plug 15 penetrates along the radial direction of the fixing pin 14 and abuts against the front end portion 1 or the bracket 4, so as to connect the front end portion 1 and the bracket 4 by limiting the fixing pin 14; conversely, the front end portion 1 and the bracket 4 can be released by removing the R-type plug 15 and the fixing pin 14 one by one. Compared with the common linear latch, the R-shaped latch 15 is not only convenient for quick insertion and removal, but also can prevent the R-shaped latch 15 from being separated from the fixing pin 14 during vibration.

As shown in Figure 5, in one embodiment, the auxiliary grinding disc 8 is covered with a dustproof shell 16, and a compensation structure is provided between the dustproof shell 16 and the bracket 4. The compensation structure includes a fixed ear 17 provided on the bracket 4, and a floating ear 18 provided on the dustproof shell 16. The floating ear 18 floats on the fixed ear 17 at a short frequency.

Specifically, in order to install the auxiliary grinding disc 8 on the bracket 4 and collect the floating dust generated by the auxiliary grinding disc 8 in the dust collecting tower, this embodiment sets a dustproof shell 16 on the auxiliary grinding disc 8, and the dust collecting port formed by the dustproof shell 16 is used to be detachably connected to the dust suction pipe of the dust collecting tower, and the auxiliary grinding disc 8 is rotatably arranged in the dustproof shell 16 for grinding the ground. Of course, the main grinding disc 7 can also be set with a dustproof shell, which is connected to the dust collecting tower through another dust suction pipe. In fact, the main grinding disc 7 and the auxiliary grinding disc 8 are rotatably arranged in the corresponding dustproof shell 16, and the dustproof shell 16 is installed on the corresponding bracket or the front end.

On the other hand, since the grinding process will involve walking on uneven ground, in order to enable the auxiliary grinding disc 8 to form a self-adaptive effect, the present embodiment provides a compensation structure on the opposite sides of the auxiliary grinding disc 8, the compensation structure comprising a fixed ear 17 fixed to the bracket 4, and a floating ear 18 fixed to the dustproof shell 16, the fixed ear 17 being provided with a floating groove along the up and down directions for the floating ear 18 to slide and extend therein, so that the floating ear 18 can float in the floating groove at a short frequency, so that it can adapt to the uneven ground, making it easier for the auxiliary grinding disc 8 to always be in contact with the ground in the unfolded state, so as to increase the area available for grinding.

As shown in Fig. 5, in one embodiment, the front end portion 1 is provided with a second walking structure 6. Specifically, in order to make the grinder stably walk on the grinding ground, the second walking structure 6 is provided at the front end portion 1 in this embodiment, and the second walking structure 6 includes a frame and a second walking wheel provided on the frame, and the frame is connected to the middle of the front end portion 1 to form a triangular stable structure with a plurality of second walking wheels located at the rear end portion 3, and the grinder can be moved at a uniform speed under the cooperation of the first walking wheel and the second walking wheel; and when each grinding disc is in an unfolded state, each grinding disc can be brought into contact with the ground for easy grinding.

As shown in Figures 1 and 5, in one embodiment, the main grinding disc 7 and the two auxiliary grinding discs 8 are driven by independent motors 19. Specifically, since each auxiliary grinding disc 8 is relatively independent, in order to increase or decrease the auxiliary grinding disc 8 according to the actual use scenario, each grinding disc in this embodiment is driven by a separate motor 19. Compared with the traditional driving method of one motor 19, it is convenient to adjust the position state of the auxiliary grinding disc 8, and it does not require the cooperation of multiple gear sets, and the assembly is also simpler.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims (10)

1. A three-grinding disc combined floor grinding machine, characterized by comprising: A frame, the frame is extended in the front and rear directions to form a front end, a middle part and a rear end, the front end is movably provided with two brackets, the middle part is provided with a receiving cavity, and the rear end is used to connect with the first walking structure; A main grinding disc, the main grinding disc being rotatably disposed at the front end portion; Two auxiliary grinding discs, the two auxiliary grinding discs are respectively located on both sides of the main grinding disc and are rotatably arranged on each of the brackets in a one-to-one correspondence; Wherein, each of the brackets is connected with an adjustment structure, so that under the action of external force, the bracket links with the corresponding auxiliary grinding disc to stay on one side of the main grinding disc to form an expanded state, or is lifted upward and at least partially stored in the accommodating cavity to form a stored state; The regulating structure comprises: A slide rail, the slide rail is spirally extended in the up-down direction and arranged in the middle part, and two ends of the slide rail are defined as a high end and a low end respectively; A pulley, the pulley being rotatably disposed on the slide rail; Two mounting sleeves, the two mounting sleeves are arranged at intervals in the middle portion along the up-down direction and are located on the inner side of the slide rail; A rotating shaft, wherein the rotating shaft is gap-pierced through the two mounting sleeves, and the bracket and the pulley are both connected to the rotating shaft; In the unfolded state, the pulley is located at the lower end of the slide rail; In the storage state, the pulley is located at the high end of the slide rail. 2. A three-grinding-disk combined floor grinding machine according to claim 1, characterized in that an opening is formed between the high end and the low end of the slide rail, and the opening is arranged toward the front end portion. 3. A three-grinding-disk combined floor grinding machine according to claim 2, characterized in that a plane perpendicular to the axis of the rotating shaft is defined as a reference plane, and the projections of any two points of the slide rail on the reference plane from the lower end to the high end of the slide rail do not overlap. 4. A three-grinding disc combined floor grinding machine according to claim 2, characterized in that the lower end and/or the high end of the slide rail is provided with an inclined section and a straight section connected in sequence, and the inclined section is located between the slide rail and the straight section. 5. A three-grinding disc combined floor grinding machine according to any one of claims 1 to 4, characterized in that the bracket is connected to the rotating shaft through a first connecting rod, which is used to link the rotating shaft to rotate forward and reverse in the mounting sleeve; The pulley is connected to the rotating shaft via a second connecting rod, which is used to drive the rotating shaft to move back and forth in the installation sleeve in an up-and-down direction, so as to link the bracket to be lifted upward or sunk downward. 6. A three-grinding-disk combined floor grinder according to any one of claims 1-4, characterized in that a positioning structure is provided at the high end and/or the low end of the slide rail, the positioning structure comprising a plurality of first positioning holes provided at the front end portion and/or the middle portion, and a plurality of second positioning holes provided at the bracket, and in the expanded state and/or the stored state, the first positioning holes correspond one-to-one to the second positioning holes and are fixed by plug-ins. 7. A three-grinding disc combined floor grinder according to claim 6, characterized in that the plug-in includes a detachably connected fixing pin and an R-shaped latch, the fixing pin is penetrated through the first positioning hole and the second positioning hole, and the R-shaped latch is vertically penetrated through the fixing pin for abutting the front end portion, the middle portion or the bracket. 8. A three-grinding disc combined floor grinder according to claim 1, characterized in that the auxiliary grinding disc is covered with a dustproof shell, and a compensation structure is provided between the dustproof shell and the bracket, and the compensation structure includes a fixed hanging ear provided on the bracket, and a floating hanging ear provided on the dustproof shell, and the floating hanging ear floats on the fixed hanging ear at a short frequency. 9. A three-grinding-disk combined floor grinding machine according to claim 1, characterized in that the front end portion is provided with a second walking structure. 10. A three-grinding-disc combined floor grinding machine according to claim 1, characterized in that the main grinding disc and the two auxiliary grinding discs are driven by motors independently arranged from each other.