JP3197906U - Linear guide and its passage module - Google Patents

Abstract

A linear guide capable of effectively improving the problem of a step in a micro linear guide and a passage module therefor are provided. A linear guide passage module includes a slider, two circulation bases, and two steel wire retainers. The slider is provided with two opposing inner load surfaces 22. Each circulation base includes an outer load surface 311 and two direction change portions each extending from two opposite edges of the outer load surface toward two opposite edges of the inner load surface. In each direction change portion, a direction change surface 321 and a connection surface 322 are sequentially formed from the corresponding edge of the outer load surface toward the edge of the inner load surface. In each direction change portion, a step S is formed between the edge of the direction change surface connected to the connection surface and the adjacent inner load surface, and the connection surface is located at the step and the corresponding inner load surface. And without a gap. [Selection] Figure 3B

Description

  The present invention relates to a linear guide, and more particularly to a microminiature linear guide and a passage module thereof.

  The so-called microminiature linear guide is a linear guide that is usually provided with a steel wire cage in addition to being defined by dimensions. In microminiature linear guides, the relative position of the balls used is not maintained by the chain belt. Furthermore, in the conventional micro linear guide, the circulation path is formed by surrounding the slider, the circulation base and the steel wire holder together, and the circulation base is directly pressed and fixed to the slider. However, since the direction change portions are provided at both ends of the circulation base and a step is formed between each direction change portion and the slider adjacent to the direction change portions, the ball rolls in the circulation passage. In addition, there is a problem that the step does not collide or operate smoothly due to the effect of the step.

  An object of the present invention is to provide a linear guide capable of effectively improving the problem of the step in the conventional micro linear guide and a passage module thereof.

  The linear guide according to the present invention has a long rail and a rail groove that is movably covered with the rail, and is formed on two inner surfaces of the rail groove facing each other. A slider provided with an inner load surface parallel to the longitudinal direction, and two circulations mounted on the two opposite outer sides of the rail groove of the slider and connected to the two inner load surfaces of the rail groove, respectively. An outer load surface that is located outside the corresponding inner load surface and surrounds the outer passage, and two opposite ends of the inner load surface from the two opposite edges of the outer load surface, respectively. The direction change surface and the connection surface are formed sequentially from the edge of the corresponding outer load surface to the edge of the inner load surface, and are connected to the connection surface. A step is formed between the edge of the direction change surface and the adjacent inner load surface, and the connection surface is located at the step and is connected to the corresponding inner load surface without a gap. And two steel wire retainers that are provided in correspondence with the two inner load surfaces and that form the inner passage in cooperation with the corresponding inner load surfaces, and move to the rail. Two direction change position restricting grooves are formed on the surface adjacent to the slider, and two direction change position restricting grooves are inserted in the surface adjacent to the slider. As a result, a direction change passage is configured jointly by each direction change portion and its corresponding direction change position restricting groove, and each inner passage and its corresponding two direction change passages, the outer passage. Circulation passage jointly Te comprises two end caps constructed, and a plurality of rolling members rollably accommodated in each of the two circulating passage, the.

  Preferably, J-shaped barbs are formed at opposite ends of each steel wire cage, and each end cap is formed with two barbs recessed on the surface away from the slider. The barbs are respectively accommodated in the return grooves so as to maintain the relative positions of the two steel wire cages with respect to the plurality of rolling members.

  The linear guide passage module according to the present invention includes a slider in which a rail groove is formed in a recessed manner and inner load surfaces are provided on two inner surfaces of the rail groove facing each other. Two circulation bases mounted on two opposite outer sides of the rail groove and connected to the two inner load surfaces of the rail groove, respectively, located outside the corresponding inner load surface, and an outer passage An outer load surface that surrounds the outer load surface and extending from two opposite edges of the outer load surface toward two opposite edges of the inner load surface, respectively, and corresponding edges of the outer load surface The direction change surface and the connection surface are sequentially formed from the edge toward the edge of the inner load surface, and a step is formed between the edge of the direction change surface connected to the connection surface and the adjacent inner load surface. And two recirculation bases, each of which is provided corresponding to two inner load surfaces, each of which includes a connection surface located at a step and two direction change portions connected to the corresponding inner load surface without a gap. And two steel wire retainers that together with its corresponding inner load surface constitute an inner passage.

  In the linear guide and the passage module according to the present invention, the connecting surface and the inner load surface are mutually connected without a gap so as to compensate for the step between the edge of the direction changing surface and the adjacent inner load surface. By being connected, the rolling member can be smoothly rolled from the direction changing surface along the connecting surface to the inner load surface.

It is a perspective view of the linear guide which concerns on this invention. It is the perspective view seen from the viewpoint different from FIG. It is sectional drawing along the XX line of FIG. It is an enlarged view of the 3B part in FIG. 3A. It is sectional drawing along the YY line of FIG. FIG. 2 is an exploded view of FIG. 1 (rails omitted). It is the perspective view which showed the circulation base of the linear guide which concerns on this invention. It is the figure which showed the combination of the circulation base and slider of the linear guide which concerns on this invention. It is the figure which showed the slider of FIG. FIG. 8 is an exploded view of the circulation base of FIG. 7.

  1 to 9 show an embodiment of the present invention. The numbers and outlines referred to in the drawings corresponding to the drawings in the present embodiment are merely taken to specifically describe the embodiments of the present invention so that the contents of the present invention can be understood. There is no limit.

  In addition to FIG. 1 and FIG. 2, it demonstrates using FIG. 3A and FIG. 4 suitably. The linear guide 100 according to the present embodiment is particularly a micro linear guide 100, but is not limited thereto. The linear guide 100 includes a rail 1, a slider 2, two circulation bases 3, two steel wire cages 4, two end caps 5, a dustproof base 6, and a plurality of rolling members 7. The rail 1 has a long shape having a longitudinal direction L. Two circulation bases 3 and two end caps 5 are attached to the slider 2, and two steel wire retainers 4 are attached to the two end caps 5, so that two circulation passages C are jointly formed by the above-described elements. Is done. In this embodiment, each of the plurality of rolling members 7 is a spherical ball, and is accommodated in the two circulation passages C so as to be able to roll. The slider 2 and the element provided on the slider 2 are movably mounted on the rail 1 along the longitudinal direction L. Hereinafter, the specific structure of each element of the linear guide 100 according to the present embodiment will be described first, and then the mutual connection relationship between the elements will be described as appropriate.

  As shown in FIG. 5, a rail groove 21 is formed in the slider 2 so as to be parallel to the longitudinal direction L described above. The slider 2 has a π-shape whose cross section perpendicular to the length direction is substantially symmetrical (see FIG. 4). The rail groove 21 of the slider 2 described above is movably covered with the rail 1, and inner load surfaces 22 that are parallel to the longitudinal direction L are provided on two inner surfaces facing each other. Furthermore, notches 23 are respectively provided at two opposing edges (the left and right corners of the slider 2 in FIG. 8) corresponding to the respective inner load surfaces 22 in the slider 2.

  As shown in FIG. 4, each inner load surface 22 includes two arc-shaped first inner side surfaces 221 and an arc-shaped second inner side surface 222 positioned between the two first inner side surfaces 221. And have. The curvature radius of each first inner surface 221 is substantially equal to the radius of the rolling member 7 (ball) and is larger than the curvature radius of each second inner surface 222. As a result, the rolling member 7 rolls in contact with the two first inner side surfaces 221 of the inner load surface 22 and does not come into contact with the second inner side surface 222.

  As shown in FIG. 5, the two circulation bases 3 are mounted on two opposite outer sides of the rail groove 21 of the slider 2 (the left outer side and the right outer side of the rail groove 21 in FIG. Connected to the two inner load surfaces 22 of the groove 21. That is, each circulation base 3 corresponds to one inner load surface 22. In the present embodiment, the two circulation bases 3 have substantially the same structure. Therefore, for convenience of explanation, only the structure and relative relationship of one of the two circulation bases 3 and the corresponding inner load surface 22 will be described below.

  As shown in FIG. 6, the circulation base 3 includes a long main body portion 31 and two direction changing portions 32 extending from both ends of the main body portion 31. The main body portion 31 is formed with an outer passage C1 that passes therethrough. That is, as shown in FIG. 4, the main body 31 has an outer load surface 311 that surrounds and configures the outer passage C1. The outer load surface 311 is located substantially outside the corresponding inner load surface 22.

  As shown in FIG. 7, the two direction change portions 32 are formed to bend and extend from two opposite edges of the outer load surface 311 toward two opposite edges of the inner load surface 22. At the same time, they are positioned substantially between the virtual extending surfaces of both the outer load surface 311 and the inner load surface 22. Each direction changing portion 32 is formed with an arcuate direction changing surface 321 and a connecting surface 322 extending from the corresponding edge of the outer load surface 311 toward the edge of the inner load surface 22.

  In each direction change part 32, the cross section of the direction change surface 321 exhibits a semicircle of about 180 degrees. A step S is formed between the edge of the direction change surface 321 connected to the connection surface 322 (the right end edge of the direction change surface 321 in FIG. 3B) and the adjacent inner load surface 22. Supplementally, the step S corresponds to a position where the connection surface 322 of the present embodiment is present. That is, in this embodiment, the connection surface 322 is positioned at the step S and is connected to the inner load surface 22 without a gap, so that the step S is compensated for, so that the rolling member 7 changes its direction. It is possible to smoothly roll from the surface 321 to the inner load surface 22 via the connection surface 322.

  Each connection surface 322 includes two first connection surfaces 3221 having an arc shape and an arc-shaped second connection surface 3222 positioned between the two first connection surfaces 3221. The curvature radius of each first connection surface 3221 is larger than the curvature radius of each second connection surface 3222. The two first connection surfaces 3221 of each connection surface 322 described above are connected to the two first inner surfaces 221 of the corresponding inner load surface 22. The second connection surface 3222 of each connection surface 322 is connected to the second inner surface 222 of the corresponding inner load surface 22. As a result, the rolling member 7 abuts on the two first connection surfaces 3221 of the connection surface 322 and rolls, and does not contact the second connection surface 3222.

  Furthermore, as shown in FIGS. 6 to 9, in this embodiment, each circulation base 3 has two circulation sub-bases 3a and 3b which are combined with each other. A site where the two circulation sub-bases 3 a and 3 b are combined with each other is located substantially in the center of the main body 31. That is, each circulation base 3 can be separated into two circulation sub-bases 3a and 3b from the approximate center of the main body 31 so that one direction changing part 32 is provided in each circulation sub-base 3a and 3b.

  As shown in FIG. 9, in each circulation base 3, the circulation sub-base among the portions where the two circulation sub-bases 3 a and 3 b are connected to each other (that is, the end face where the two circulation sub-bases 3 a and 3 b are connected to each other). A positioning groove 312 and a displacement prevention column 313 are formed on the base 3a side, and a positioning column 314 and a displacement prevention groove 315 are formed on the circulation sub-base 3b side. Each of the positioning groove 312 and the positioning column 314 surrounds the outer edge of the outer passage C1, and has a structure that can be fitted to each other. The misalignment prevention column 313 and the misalignment prevention groove 315 are positioned at the periphery of the positioning groove 312 and the positioning column 314, respectively, and have a structure that can be inserted and connected to each other.

  Further, a fixed connection portion 323 that can be in close contact with the notch 23 of the slider 2 is provided at a position corresponding to the connection surface 322 of the direction changing portion 32 in each of the circulation sub-bases 3a and 3b. Furthermore, the main body portion 31 and the two direction changing portions 32 of each circulation base 3 have a substantially U-shaped structure and collectively enclose an accommodation groove 33 (see FIG. 6). The fixed connection portion 323 described above protrudes into the accommodation groove 33. Further, at least a part of the connection surface 322 is an outer surface of the fixed connection portion 323.

  As a result, as shown in FIGS. 7 to 9, the two circulation sub-bases 3 a and 3 b of each circulation base 3 are mounted in the accommodation groove 33 at the portion where the inner load surface 22 of the slider 2 is provided. In this way, the sliders 2 are attached to the slider 2 so as to be parallel to the longitudinal direction L from opposite ends of the corresponding inner load surface 22. At this time, the positioning column 314 is inserted into the positioning groove 312, the misalignment prevention column 313 is inserted into the misalignment prevention groove 315, and the fixed connection portion 323 is inserted into each notch 23. The corresponding inner load surface 22 is connected without a gap.

  Unlike the conventional circulation base that is directly pressed and fixed to the slider by the above-described configuration, each circulation base 3 of the present embodiment is parallel to the longitudinal direction L via the two circulation sub-bases 3a and 3b. Thus, it is possible to avoid an assembly error that may occur when the conventional circulation base is directly pressed and fixed to the slider, and the assembly between the circulation base 3 and the slider 2 can be avoided. The accuracy and speed can be effectively improved.

  As shown in FIGS. 3A to 5, the steel wire retainer 4 includes a straight portion 41 and two J-shaped barbs 42 each bent and extended perpendicularly from both ends of the straight portion 41. That is, J-shaped barbs 42 are formed at opposite ends of each steel wire retainer 4. Further, the two steel wire cages 4 are provided corresponding to the two inner load surfaces 22 described above, and the linear portion 41 described above is substantially parallel to the longitudinal direction L. When the straight portion 41 of each steel wire retainer 4 is opposed to the corresponding inner load surface 22, the opposed region is substantially located on the second inner surface 222, and the plane on which each barb 42 is located is the longitudinal direction described above. It is substantially perpendicular to the direction L.

  Thereby, the linear part 41 of each steel wire holder | retainer 4 and its corresponding inner side load surface 22 comprise the inner side channel | path C2 together. The two first inner side surfaces 221 of each steel wire retainer 4 and its corresponding inner load surface 22 are 3 so that the plurality of rolling members 7 can stably roll in the inner passage C2. It contacts the rolling member 7 by a point positioning method.

  The combination of the slider 2, the circulation base 3, and the steel wire retainer 4 in the embodiment of the present invention can also be called a passage module (not shown) of the linear guide 100. Similarly, the passage module of the linear guide 100 here refers to the passage module of the micro linear guide 100 in particular, but is not limited thereto.

  The two end caps 5 are movably covered on the rail 1 and are fixed to opposite ends of the slider 2 (the left end and the right end of the slider 2 in FIG. 3A). Each end cap 5 is formed by recessing two arc-shaped direction change position limiting grooves 51 separated from each other on the surface adjacent to the slider 2 (the right surface of the left end cap 5 in FIG. 3A). Yes. Each end cap 5 is formed with two J-shaped return grooves 52 formed on the surface away from the slider 2 (the left surface of the left end cap 5 in FIG. 3A). The outer shape of the return groove 52 corresponds to the return 42 of the steel wire retainer 4.

  More specifically, when the two end caps 5 are fixed to the opposite ends of the slider 2, the direction change passages C <b> 3 are configured by the direction change portions 32 and the corresponding direction change position restriction grooves 51. As described above, the direction change portions 32 of the two circulation bases 3 described above are inserted into the direction change position restriction grooves 51 of the two end caps 5, respectively. Each inner passage C2 and the two corresponding direction change passages C3 and outer passage C1 together constitute the circulation passage C described above. Further, each of the barbs 42 is housed in the barb 52, so that the J-shaped barb 42 and the J-shaped barb 52 are fitted to each other, so that the barb 42 is unlikely to fall off the end cap 5. In addition, the relative position of the two steel wire retainers 4 described above with respect to the plurality of rolling members 7 can be more stably retained.

The dustproof base 6 has an integrally molded structure, and includes two substantially U-shaped end dustproof pieces 61 and two long bottom dustproof pieces 62 connecting the two end dustproof pieces 61. The two end dustproof pieces 61 are fixedly connected to the surfaces of the two end caps 5 away from the slider 2 (corresponding to the surface of the end cap 5 where the return groove 52 is formed). The inner edge of the end dustproof piece 61 contacts the surface of the rail 1. The return grooves 52 are each shielded by the two end dustproof pieces 61 described above so that the return 42 is sandwiched between the end cap 5 and the end dustproof piece 61 described above. The length direction of the bottom dust-proof piece 62 is substantially parallel to the longitudinal direction L, and the edges of the two bottom dust-proof pieces 62 facing each other abut both opposite surfaces of the rail 1.
<Industrial applicability>
As described above, the linear guide and the passage module thereof according to the present invention have a gap between the connection surface and the inner load surface so as to compensate for a step between the edge of the direction changing surface and the adjacent inner load surface. By being connected to each other without any problem, the ball can smoothly roll from the direction change surface along the connection surface to the inner load surface.

  The circulation base of the present invention is fixedly connected to the slider so as to be parallel to the longitudinal direction via two circulation sub-bases, thereby avoiding assembly errors that may have occurred in the past, and The assembly accuracy and speed between the circulation base and the slider can be effectively improved.

  In addition, according to the present invention, the J-shaped barb of the steel wire retainer and the J-shaped barb of the end cap are fitted to make it difficult for the barbage of the steel wire retainer to fall off the end cap. The relative position of the steel wire retainer described above with respect to the rolling member can be more stably retained.

  The above are only preferred embodiments of the present invention, and do not limit the scope of the utility model registration request of the present invention. Accordingly, all equivalent changes and modifications made based on the claims of the utility model registration of the present invention are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 100 ... Linear guide, 1 ... Rail, 2 ... Slider, 21 ... Rail groove, 22 ... Inside load surface, 221 ... 1st inside surface, 222 ... 2nd inside surface, 23 ... Notch, 3 ... Circulation base, 3a 3b ... circulation sub-base, 31 ... main body, 311 ... outer load surface, 312 ... positioning groove, 313 ... shift prevention column, 314 ... positioning column, 315 ... shift prevention groove, 32 ... direction change portion, 321 ... direction change. Surface, 322 ... connection surface, 3221 ... first connection surface, 3222 ... second connection surface, 323 ... fixed connection part, 33 ... housing groove, 4 ... steel wire retainer, 41 ... linear part, 42 ... return, 5 ... End cap, 51 ... Direction change position limiting groove, 52 ... Return groove, 6 ... Dust-proof base, 61 ... End dust-proof piece, 62 ... Bottom dust-proof piece, 7 ... Rolling member, L ... Longitudinal direction, C ... Circulation Passage C1, outer passage, C2 inner passage, C ... diverting passage, S ... step

Claims (10)

A long rail,
A rail groove that is movably covered on the rail is formed to be recessed, and inner load surfaces that are parallel to the longitudinal direction of the rail are respectively provided on two inner surfaces of the rail groove that face each other. A slider and
Two circulation bases which are respectively mounted on the two opposite outer sides of the rail groove of the slider and connected to the two inner load surfaces of the rail groove, respectively, of the corresponding inner load surface An outer load surface that is located outside and surrounds the outer passage, and extends from two opposite edges of the outer load surface toward two opposite edges of the inner load surface. The direction change surface and the connection surface are sequentially formed from the corresponding edge of the outer load surface toward the edge of the inner load surface, and adjacent to the edge of the direction change surface connected to the connection surface. A step is formed between the inner load surface and the connection surface is located at the step and is connected to the corresponding inner load surface without a gap; Including And two of circulation base,
Two steel wire retainers which are provided corresponding to the two inner load surfaces, respectively, and which form an inner passage in cooperation with the corresponding inner load surfaces;
Two direction changing positions that are movably covered with the rails, are fixed to opposite ends of the slider, and the direction changing portions of the two circulation bases are respectively inserted on surfaces adjacent to the slider. By forming the restriction groove so as to be recessed, each of the direction change portions and the corresponding direction change position restriction groove constitutes a direction change passage, and each of the inner passages and the corresponding two of the above-mentioned change directions. Two end caps in which a circulation passage is jointly formed by the direction change passage and the outer passage;
A plurality of rolling members each accommodated in two circulation passages so as to be capable of rolling;
A linear guide comprising: Each of the circulation bases has two circulation subbases combined with each other, and each of the circulation subbases is provided with one direction changing unit, and each of the two circulation subbases of each of the circulation bases has its The linear guide according to claim 1, wherein the linear guide is attached to the slider so as to be parallel to the longitudinal direction from opposite ends of the corresponding inner load surface. The slider is provided with notches at two opposite edges of each inner load surface,
Each circulation sub-base is provided with a fixed connection portion at a position corresponding to the connection surface of the direction changing portion,
The fixed connection portions are respectively inserted into the notches so that each of the connection surfaces and the corresponding inner load surface do not have a gap through mutual fitting of the fixed connection portions and the notches. The linear guide according to claim 2, wherein the linear guide is connected. In each of the circulation bases, one of the portions where the two circulation sub-bases are connected to each other is formed with a positioning groove and a displacement prevention column, and the other is formed with a positioning column and a displacement prevention groove. ,
The positioning groove and the positioning column each surround an outer edge of the outer passage,
The slip prevention column and the slip prevention groove are located on the periphery of the positioning groove and the positioning column, respectively.
The said positioning column is inserted in the said positioning groove when two said circulation sub-bases are mutually connected, The said slip prevention pillar is inserted in the said slip prevention groove, The Claim 3 characterized by the above-mentioned. Linear guide. The plurality of rolling members are all spherical balls,
Each of the inner load surfaces has two arc-shaped first inner surfaces and an arc-shaped second inner surface positioned between the two first inner surfaces, and each of the first inner surfaces. Is substantially equal to the radius of any ball, and is larger than the radius of curvature of each of the second inner surfaces,
Each of the connection surfaces has two first connection surfaces having an arc shape, and an arc-shaped second connection surface positioned between the two first connection surfaces, and each of the first connections. A radius of curvature of the surface is greater than a radius of curvature of each of the second connecting surfaces,
The two first connection surfaces of each connection surface are respectively connected to the two first inner surfaces of the corresponding inner load surface, and the second connection surfaces of the connection surfaces correspond to the first connection surfaces. The linear guide according to claim 1, wherein the linear guide is connected to the second inner surface of the inner load surface. The cross section of each of the direction change surfaces has a semicircular shape of about 180 degrees,
When each steel wire retainer faces its corresponding inner load surface, the facing area is substantially located on the second inner surface,
The two first inner surfaces of each steel wire retainer and its corresponding inner load surface have a three-point positioning system so that the ball can roll stably in the inner passage. The linear guide according to claim 5, wherein the linear guide abuts against the ball. J-shaped barbs are formed at opposite ends of each steel wire cage,
Each end cap is formed with two return grooves recessed on the surface away from the slider,
The barbs are respectively accommodated in the barbs so as to hold the relative positions of the two steel wire cages with respect to the plurality of rolling members. Linear guide as described in   The linear guide according to claim 7, further comprising a dustproof base that is fixedly connected to surfaces of the two end caps away from the slider and shields the return groove. A slider in which a rail groove is formed in a recessed manner, and an inner load surface is provided on each of two opposite inner surfaces of the rail groove;
Two circulation bases which are respectively mounted on the two opposite outer sides of the rail groove of the slider and connected to the two inner load surfaces of the rail groove, respectively, of the corresponding inner load surface An outer load surface that is located outside and surrounds the outer passage, and extends from two opposite edges of the outer load surface toward two opposite edges of the inner load surface. The direction change surface and the connection surface are sequentially formed from the corresponding edge of the outer load surface toward the edge of the inner load surface, and adjacent to the edge of the direction change surface connected to the connection surface. A step is formed between the inner load surface and the connection surface is located at the step and is connected to the corresponding inner load surface without a gap; Including And two of circulation base,
Two steel wire retainers which are provided corresponding to the two inner load surfaces, respectively, and which form an inner passage in cooperation with the corresponding inner load surfaces;
A linear guide passage module comprising: Each of the circulation bases has two circulation sub-bases combined with each other, and each of the circulation sub-bases is provided with one of the direction change portions,
The slider is provided with notches at two opposite edges of each inner load surface,
Each circulation sub-base is provided with a fixed connection portion at a position corresponding to the connection surface of the direction changing portion,
The two circulation sub-bases of each circulation base are respectively attached to the slider from opposite ends of the corresponding inner load surface;
The fixed connection portions are respectively inserted into the notches so that each of the connection surfaces and the corresponding inner load surface do not have a gap through mutual fitting of the fixed connection portions and the notches. The linear guide passage module according to claim 9, wherein the linear guide passage module is connected.

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