Linear movement guide unit

Abstract

The utility model relates to a linear movement guide unit. The device comprises a linear guide rail, wherein first rail surfaces are respectively formed on two side surfaces along the length direction of the linear guide rail; the sliding block body comprises two arm parts transversely erected on the linear guide rail, the sliding block body forms a second rail surface opposite to the first rail surface, each arm part comprises a second rail surface opposite to the first rail surface, and a rail path is formed by the first rail surface and the second rail surface; the plurality of rollers are movably arranged in the track path; the retaining plate is arranged along the track path and used for retaining the roller on the sliding block body, and the retaining plate is integrally formed; the retaining plate is provided with a conical counterbore for fixing the retaining plate on the sliding block body; a through hole is reserved in the retaining plate in the length direction of the retaining plate, and a cross recess countersunk head fixing bolt penetrates through the conical countersunk head hole and is screwed into the internal thread on the arm portion. The retaining plate of the linear movement guide unit can be regarded as a part, and a plurality of parts do not need to be stacked, so that the structure is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling linear guide rail pairs, in particular to a linear motion guiding unit. Background Art

[0002] The patent with the publication number CN 108980204A discloses a linear motion guide unit, the key of which is a retaining plate, which is composed of three parts, namely, a retaining member, a metal fixing member and a metal block member, which are simply stacked.

[0003] However, the above structure has the following problems: the number of guide units is large and the stability of the entire unit is poor; there are additional mounting holes for fixing bolts on the outside of the slider body, which are prone to accumulation of debris; the bolts used are relatively long, resulting in a longer processing time for the slider body, and also affecting the overall aesthetics. Summary of the invention

[0004] To this end, the utility model provides a linear motion guide unit that can better keep the roller as a rolling body moving smoothly inside the slider body, and the linear motion guide unit has a stable structure and is more convenient to use and install.

[0005] In order to solve the above technical problems, the utility model provides a linear motion guide unit, comprising:

[0006] The linear guide rail has two side surfaces along its length direction respectively forming first track surfaces;

[0007] A slider body, comprising two arms horizontally mounted on the linear guide rail, wherein the slider body forms a second track surface facing the first track surface, each of the arms comprises a second track surface arranged opposite to the first track surface, and a track path is formed by the first track surface and the second track surface;

[0008] A plurality of rollers are movably disposed in the track path;

[0009] A retaining plate, arranged along the track path and retaining the roller on the slider body, the retaining plate being integrally formed;

[0010] Wherein, the retaining plate is provided with a pair of first guide surfaces extending along its length direction and used for guiding one end surface of the roller;

[0011] The retaining plate is provided with a tapered countersunk hole for fixing the retaining plate on the slider body;

[0012] The retaining plate is provided with a through hole along its length direction to avoid the cross-slot countersunk fixing bolt that needs to pass through when the retaining plate is fixed on the slider body. The cross-slot countersunk fixing bolt passes through the conical countersunk hole and is screwed into the internal thread on the arm.

[0013] In an implementation manner of the present utility model, the retaining plate is made of synthetic resin material.

[0014] In one embodiment of the utility model, it also includes end covers respectively attached to the end faces, and the rollers roll on a circulation path formed by the track path, the return path, and a turning path connecting the track path and the return path and formed on the end covers.

[0015] In one embodiment of the utility model, the end cover includes an end cover body formed on the outer peripheral surface of the turning path and a first spacer and a second spacer embedded in a recess formed by the shell side end surface of the end cover body, and an end seal is provided on the end surface of the end cover.

[0016] In an embodiment of the present invention, the return path is formed on the arm portion, and the return path is provided with an insertion tube, and the insertion tube is inserted into an insertion hole formed on the arm portion.

[0017] In one embodiment of the present invention, a lower surface seal is provided between the lower surface of the arm and the linear guide rail.

[0018] In one embodiment of the utility model, the cross-section of the retaining plate is V-shaped, including a convex top, two first guide surfaces symmetrically arranged on the top along the length direction of the retaining plate, and the second rail surface is formed with a concave locking groove along its length direction, and the top is clamped in the concave locking groove.

[0019] In an embodiment of the present invention, the arm portion forms a second guide surface relative to the first guide surface, and two end surfaces of the roller are in rolling contact with the first guide surface and the second guide surface respectively.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The linear motion guide unit described in the utility model has a retaining plate which can be regarded as one part, and does not need to be stacked with multiple parts, so that the structure is more stable.

[0022] The retaining plate of the utility model is a single part when in use, and is more convenient to install with higher installation efficiency.

[0023] The manufacturing process of the retaining plate of the utility model is more advanced and can realize an automated production mode, reduce processing time, improve production efficiency, and thus reduce production costs.

[0024] The outer side of the slide block body of the utility model has no bolt holes, is not easy to accumulate chips, and is more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0026] Figure 1 It is a perspective view showing a cross section of a linear motion guide unit of the present invention which is partially cut away.

[0027] Figure 2 It is a cross-sectional view of the linear motion guide unit of the utility model.

[0028] Figure 3 yes Figure 2 Cross-sectional view along EE direction.

[0029] Figure 4 This is a cross-sectional view showing a state where the retaining plate is fixed to the housing by fixing bolts.

[0030] Figure 5 It is a three-dimensional diagram of the retaining plate of the present utility model.

[0031] Figure 6 yes Figure 5 Cross-sectional view along FF direction.

[0032] Figure 7 is a cross-sectional view of the retaining plate.

[0033] Figure 8 It is a structural diagram of the retaining plate.

[0034] Fig. 9 yes Figure 8 Cross-sectional view along the HH direction.

[0035] Description of the Figures in the Specification:

[0036] 1. Linear guide; 10. First spacer; 11. Second spacer; 12. Housing; 13. Core; 14. Track path; 15. Return path; 16. Turning path; 17. Circulation path;

[0037] 2. Slider body; 21. First track surface; 22. Second track surface; 23. Side surface; 25. End surface;

[0038] 3. End cover; 30. Through hole; 31. Second guide surface; 32. First guide surface; 34. First mounting hole; 36. Concave locking groove;

[0039] 4. End seal; 40. Cross recessed countersunk fixing bolt; 41. Conical countersunk hole; 47. Top;

[0040] 5. Roller; 56. Insertion hole; 57. Threaded hole; 58. Installation hole;

[0041] 6. Lower surface seal; 65. Arm;

[0042] 7. Keep the board;

[0043] 8. Intubation. DETAILED DESCRIPTION

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0045] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0046] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0048] Reference Figure 1As shown, the linear motion guide unit includes a linear guide rail 1 and a slider body 2. The linear guide rail 1 has first track surfaces 21 formed on two side surfaces 23 along the length direction, and two arm portions 65 of the slider body 2 are horizontally mounted on the linear guide rail 1. The slider body 2 forms second track surfaces 22 facing the first track surfaces 21, and the slider body 2 moves relative to the first track surfaces 21 through a plurality of rollers 5 serving as rolling bodies rolling on a track path 14 formed by the first track surface 21 and the second track surface 22.

[0049] The cross-sectional shape of the slider body 2 is an inverted U-shape, and it has a second track surface 22 and a return path 15 extending parallel to the second track surface 22; the end cover 3 is respectively closely attached to the two end surfaces 26 of the slider body 2 in the length direction; the end seal 4 is arranged on the end surface of the end cover 3;

[0050] The roller 5 rolls on a circulation path 17 formed by a track path 14, a return path 15, and a turning path 16 connecting the track path 14 and the return path 15 and formed on the end cover 3; the retaining plate 7 is configured along the track path 14 and retains the roller 5 on the slider body 2.

[0051] The linear guide 1 is provided with a mounting hole 58, and when the linear guide 1 is mounted on a matching component such as a base, a foundation, or a machine table, a bolt (not shown) is inserted into the mounting hole 58. In addition, the slider body 2 is provided with a mounting threaded hole 57 for mounting a matching component such as a workpiece or a machine thereon. The end cover 3 and the end seal 4 are fixed to the slider body 2 by fixing bolts 60.

[0052] like Figure 2 As shown, a four-row linear motion guide unit is provided with four track paths 14. The slider body 2 includes a main body 64 provided with a threaded hole 57 and a pair of arm parts 65 hanging down from both ends of the main body 64. The two arm parts 65 of the slider body 2 are formed with a return path 15 for the roller 5 to roll without load. The return path 15 is formed in the insert tube 8, and the insert tube 8 is inserted into the insertion hole 56 formed on the arm part 65 of the slider body 2. On the arm part 65 of the slider body 2, a concave locking groove 36 is formed between the upper and lower second track surfaces 22.

[0053] The retaining plate 7 for retaining the roller 5 on the slider body 2 is provided with a top portion 47 of a flat surface as a convex portion having a V-shaped cross section along the length direction, and the top portion 47 of the retaining plate 7 is engaged with the concave engaging groove 36 of the slider body 2 to dispose the retaining plate 7 on the slider body 2. The assembly is performed in such a manner that the guide surface 32 of the retaining plate 7 guides one end surface 25 of the roller 5, and the second guide surface 31 of the slider body 2 guides the other end surface 25 of the roller 5. A lower surface seal 6 is provided between the lower surface of the arm portion 65 and the linear guide 1. The end cover 3 includes an end cover body 9 having an outer peripheral surface formed with a deflection path 16, and a first spacer 10 and a second spacer 11 ( Figure 3 ).

[0054] exist Figure 3 The figure shows a circulation path 17 in which the roller 5 as a rolling body rolls endlessly. The circulation path 17 is composed of a track path 14 formed between the first track surface 21 of the linear guide 1 and the second track surface 22 of the slider body 2, a return path 15 formed in the insert 8 inside the slider body 2, and a turning path 16 provided on the end cover 4.

[0055] In addition, if Figure 2 and Figure 4 As shown in the linear motion guide unit, the top 47 of the V-shaped cross section of the holding plate 7 as a convex portion is formed between the upper and lower first guide surfaces 32 of the holding plate 7 along the length direction, and as shown in FIG. Figure 2 As shown, the top portion 47 is embedded in a V-shaped concave retaining groove 36 formed along the length direction of the slider body 2 between the upper and lower second track surfaces 22 of the slider body 2. The cross-slotted countersunk fixing bolt 40 passes through the conical countersunk hole 41 formed on the metal structure of the core 13 of the retaining plate 7 and is screwed into the internal thread 34 on the arm 65 of the slider body 2. The internal thread 34 can be machined by a machine tool equipped with a 90° angle head. Thus, the retaining plate 7 is fixed to the slider body 2.

[0056] The linear motion guide unit of the present invention particularly has a retaining plate 7 for retaining the roller 5 on the slider body 2. Figure 5 , Figure 6 and Figure 7As shown, the core 13 of the retaining plate 7 is made of metal, such as 304 stainless steel, and the outer periphery of the metal material is wrapped with a shell 12 made of engineering plastics such as PA66. The shell 12 made of engineering plastics has a pair of first guide surfaces 32 extending along the length direction and guiding one end face 25 of the roller 5 respectively. The core 13 made of metal extends along the length direction from the inside of the retaining plate 7 to support the shell 12 made of engineering plastics, so that the shell 12 is not easily deformed, and forms a tapered countersunk hole 41 required for fixing the retaining plate 7 on the slider body 2. Because the core 13 is made of metal, the tightening force of the cross-slot countersunk fixing bolt 40 can be prevented from directly acting on the shell 12. The shell 12 made of engineering plastics has a through hole 30 reserved at a predetermined position along the length direction to avoid the cross-slot countersunk fixing bolt 40 that needs to pass through when the retaining plate 7 is fixed on the slider body 2. As shown Figure 4 As shown, an internal thread 34 for mounting a threaded hole is formed on the arm 65 of the slider body 2, and a through hole 30 is formed at multiple locations (two locations in the embodiment) separated by a specified interval on the outer shell 12 of the retaining plate 7. A conical countersunk hole 41 is formed at multiple locations (two locations in the embodiment) separated by a specified interval on the core 13 of the retaining plate 7, arranged at a position opposite to the internal thread 34 for mounting the slider body 2, and separated in the length direction. The manufacturing of the retaining plate 7 adopts a complex production process, which generally includes the preparation of the metal raw material of the core 13, the preparation of the engineering plastic raw material of the outer shell 12, the preparation of the injection mold, the positioning of the metal raw material, the injection of the engineering plastic, and other process flows. After the manufacturing is completed, the two materials used for the core 13 and the outer shell 12 are tightly fitted and inseparable, avoiding deformation caused by the injection molding of the engineering plastic. Therefore, the retaining plate 7 will not be deformed due to the injection molding of the engineering plastic and the tightening force, and the rolling state of the roller 5 is not hindered, so that the roller 5 can roll smoothly on the track path 14.

[0057] The linear motion guide unit of the utility model discloses in the above-mentioned embodiment that two through holes 30 and two tapered countersunk holes 41 are set in the length direction of the retaining plate 7, but the number and spacing of the through holes and the tapered countersunk holes are not limited to being set in the length direction. An appropriate number can be set according to the length of the retaining plate 7, that is, one, three or four or more can be set according to the length of the retaining plate 7. In this case, it is only necessary to form a corresponding number of through holes 30 on the outer shell 12 of the retaining plate 7 and to form tapered countersunk holes 41 for installation on the core 13.

[0058] In other embodiments, reference Figure 8 and Fig. 9 The retaining plate 7 of the linear motion guide unit eliminates the metal core 13 and uses a synthetic resin material with high hardness as the whole. That is, the whole retaining plate 7 has a Fig. 9 The two tapered countersunk holes 41 are shown. According to the length of the retaining plate 7, one, three or four tapered countersunk holes 41 can be set, and only a corresponding number of internal threads 34 need to be formed on the arm 65 of the slider body 2. The retaining plate 7 can be regarded as a single part, without stacking multiple parts, so that the structure is more stable. Since the retaining plate 7 is a single part when in use, it is more convenient to install and the installation efficiency is higher.

[0059] The linear motion guide unit of the utility model can be used for sliding components in various devices having relative sliding components in machine tools, semiconductor manufacturing devices, precision measuring devices, etc.

[0060] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A linear motion guide unit, characterized in that: include: The linear guide rail (1) has two side surfaces (23) along its length direction respectively forming first track surfaces (21); A slider body (2) comprises two arms (65) mounted horizontally on the linear guide rail (1); the slider body (2) forms a second track surface (22) facing the first track surface (21); each of the arms (65) comprises a second track surface (22) arranged opposite to the first track surface (21); and a track path (14) is formed by the first track surface (21) and the second track surface (22); A plurality of rollers (5) movably arranged in the track path (14); a retaining plate (7) disposed along the track path (14) and retaining the roller (5) on the slider body (2), the retaining plate (7) being integrally formed; The retaining plate (7) is provided with a pair of first guide surfaces (32) extending along its length direction and used to guide an end surface (25) of the roller (5); The retaining plate (7) is provided with a tapered countersunk hole (41) for fixing the retaining plate (7) on the slider body (2); The retaining plate (7) is provided with a through hole (30) along its length direction to avoid the need for a cross-slotted countersunk fixing bolt (40) to pass through when the retaining plate (7) is fixed to the slider body (2); the cross-slotted countersunk fixing bolt (40) passes through the conical countersunk hole (41) and is screwed into the internal thread on the arm portion (65).

2. A linear motion guide unit according to claim 1, characterized in that: The retaining plate (7) is made of synthetic resin material.

3. A linear motion guide unit according to claim 1, characterized in that: It also includes end covers (3) respectively in close contact with the end surfaces (25), and the rollers (5) roll on a circulation path (17) formed by the track path (14), the return path (15), and a turning path (16) connecting the track path (14) and the return path (15) and formed on the end covers (3).

4. A linear motion guide unit according to claim 3, characterized in that: The end cover (3) comprises an end cover (3) body formed on the outer peripheral surface of the turning path (16), and a first spacer (10) and a second spacer (11) embedded in a recess formed by a shell side end surface (25) of the end cover (3) body, and an end seal (4) is provided on the end surface (25) of the end cover (3).

5. A linear motion guide unit according to claim 3, characterized in that: The return path (15) is formed on the arm portion (65), and the return path (15) is provided with an insertion tube (8), and the insertion tube (8) is inserted into an insertion hole (56) formed on the arm portion (65).

6. A linear motion guide unit according to claim 1, characterized in that: A lower surface seal (6) is provided between the lower surface of the arm portion (65) and the linear guide rail (1).

7. A linear motion guide unit according to claim 1, characterized in that: The retaining plate (7) has a V-shaped cross section and comprises a convex top portion (47). Two first guide surfaces (32) are symmetrically arranged on the top portion (47) along the length direction of the retaining plate (7). The second track surface (22) is formed with a concave locking groove (36) along its length direction. The top portion (47) is locked in the concave locking groove (36).

8. The linear motion guide unit according to claim 1, characterized in that: The arm portion (65) forms a second guide surface (31) relative to the first guide surface (32), and the two end surfaces (25) of the roller (5) (5) are in rolling contact with the first guide surface (32) and the second guide surface (31), respectively.

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