Micro linear guide rail installed in clamping mode

Abstract

The invention relates to the technical field of micro linear guide rails, in particular to a micro linear guide rail installed in a clamped mode. A micro linear guide rail installed in a clamped mode comprises a linear rail and a sliding block module, the sliding block module is installed on the linear rail and can reciprocate relative to the linear rail, the sliding block module comprises a sliding block body, a return cover and two metal scrapers, and the positions, close to the edges of the two sides, of the bottom face of the sliding block body are each provided with a bearing boss. The two ends of the bearing boss exceed the two ends of the sliding block body to form four protrusions. The return cover is formed by splicing two L-shaped frames, each L-shaped frame comprises an end cover part and a side wall part, the end cover part of one L-shaped frame is in pin joint with the side wall part of the other L-shaped frame, the two metal scrapers are respectively clamped on the end cover parts of the two L-shaped frames, and the outer surfaces of the two metal scrapers and the outer end surfaces of the end cover parts are positioned on the same horizontal plane. According to the miniature linear guide rail, threaded holes do not need to be machined, screw assembly is avoided, and therefore assembly is easy, convenient and efficient, machining of all parts is simplified, and the manufacturing cost is low.

Description

Technical Field

[0001] The invention relates to the technical field of miniature linear guide rails, in particular to a miniature linear guide rail that is installed by snap-fitting. Background Art

[0002] The end faces of existing linear guides need to be threaded with return covers and other components, so threaded holes need to be processed. When the size / volume of the linear guide becomes smaller, the corresponding screws and threaded holes also need to become smaller. The smaller the threaded hole, the more difficult it is to process, and the corresponding manufacturing cost will be higher. At the same time, the efficiency of assembling a small linear guide will also slow down, resulting in increased working hours. The increase in cost will cause the product to lose its market price advantage. At present, the assembly height of linear guides used in the precision instrument industry is about 15mm, and the corresponding threaded hole size is smaller, which is more difficult to process. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the prior art in the above-mentioned background technology, a micro linear guide rail with snap-fit ​​installation is provided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a micro linear guide rail installed by clamping, including a linear track and a slider module, the slider module is installed on the linear track and can reciprocate relative to the linear track, the slider module includes: A slider body, wherein a bearing boss is disposed at the bottom surface of the slider body near the two side edges, and two ends of the bearing boss extend beyond the two ends of the slider body to form four protrusions; A return cover, the return cover is composed of two L-shaped frames, the L-shaped frames include end cover parts and side wall parts, the end cover part of one L-shaped frame is pin-connected with the side wall part of the other L-shaped frame, the end cover part is provided with a groove that matches the protrusion, and the side wall part is provided with a support plate that supports the bearing boss; Two metal scrapers are respectively engaged on the two L-shaped frame end cover parts, and the outer surfaces of the two metal scrapers are on the same horizontal plane as the outer end surfaces of the end cover parts.

[0005] Furthermore, the protrusion has a U-shaped upper surface, and the U-shaped upper surface is in contact with the upper surface of the first groove.

[0006] Furthermore, the lower surface of the bearing boss is in contact with the upper surface of the support plate.

[0007] Furthermore, a first convex strip is provided on the side wall portion along its length direction, a first C-shaped groove is opened on the first convex strip, and the lower part of the first convex strip extends horizontally to form a first supporting plate, and one end of the first supporting plate extends to below the groove.

[0008] Furthermore, a second C-shaped groove is formed in the end cap portion. One end of the second C-shaped groove extends horizontally to form a second support plate, and one end of the second support plate extends below the groove one.

[0009] Furthermore, concave arc channels are respectively arranged on both sides of the bearing boss. The concave arc channels and the first C-shaped groove and the second C-shaped groove respectively form two closed circulation channels.

[0010] Furthermore, a Gothic groove is formed in the protrusion. The Gothic groove and the concave arc channel are in arc transition.

[0011] Furthermore, steel balls and a cage are arranged in the closed circulation channels. An installation groove for the cage is formed in the end cap portion.

[0012] Further, one end of the side wall portion away from the end cap portion is a thick-wall thinning section. A first pin hole and a clamping groove are formed in the thick-wall thinning section.

[0013] Furthermore, a second pin hole matching with the first pin hole is formed in the outer wall of the end cap portion away from the side wall portion.

[0014] Furthermore, a cylindrical pin or a columnar pin with a hexagonal cross-section is inserted into the first pin hole and the second pin hole.

[0015] Furthermore, the cross-section of the metal scraping plate is in a "U" shape. It includes a cover plate and baffle plates located at both ends of the cover plate. The baffle plates are perpendicular to the cover plate, and clamping buckles matching with the clamping grooves are arranged on the baffle plates.

[0016] Furthermore, the clamping buckle is a wedge-shaped block or a strip-shaped block.

[0017] Furthermore, a first oil inlet is formed in the cover plate.

[0018] Furthermore, a lubricating oil path and a second oil inlet corresponding to the first oil inlet are formed in the end cap portion. The second oil inlet is communicated with the lubricating oil path.

[0019] Advantages of the present invention: The micro linear guide rail of the present invention does not need to process threaded holes and is assembled without screws. Therefore, the assembly is simple and efficient, and the processing of each component is simplified, and the manufacturing cost is low; Compared with the prior art, two bearing bosses are arranged at the lower part of the slider body. The part of the bearing boss exceeding the slider body forms a protrusion. While the return cover is formed by splicing two L-shaped frames, the slider body is connected to the return cover through the bearing boss and the protrusion, and is connected to the return cover in a snap-fit manner through two metal scraping plates, forming a stable slider module; The cylindrical pin, the protrusion of the slider body and the groove of the return cover cooperate with each other, and the metal scraper buckle works together to completely fix the return cover; the metal scraper can prevent some foreign matter from entering the linear guide when it is working and affecting its movement; it can also hide the cylindrical pin, retainer, etc., so that the cylindrical pin is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the slider body in the present invention.

[0023] Figure 3 It is a structural schematic diagram of the end surface of the return cover in the present invention.

[0024] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle L-shaped frame end face.

[0025] Figure 5 yes Figure 4 main view.

[0026] Figure 6 yes Figure 4 Rear view of.

[0027] Figure 7 It is a schematic diagram of the connection structure between the return cover and the slider body of the present invention.

[0028] Figure 8 yes Figure 7 Schematic diagram of the assembled structure.

[0029] Fig. 9 It is a structural schematic diagram of a metal scraper in the present invention.

[0030] Fig.10 yes Figure 6 Side view of.

[0031] Fig.11 It is a structural schematic diagram of another metal scraper in the present invention.

[0032] In the figure: 1. Linear track; 2. Slide block body; 21. Bearing boss; 211. Concave arc channel; 22. Protrusion; 221. U-shaped upper surface; 222. Gothic channel; 3. Reverse cover; 31. L-shaped frame; 311. End cover part; 3111. First groove; 3112. Second C-shaped groove; 3113. Second pin hole; 3114. Lubricating oil path; 3115. Second oil inlet; 3116. Installation groove; 312. Side wall part; 3121. Support plate; 31211. First support plate; 31212. Second support plate; 3122. First rib; 31221. First C-shaped groove; 3123. Thick wall thinning section; 31231. First pin hole; 31232. Card slot; 4. Metal scraper; 41. Cover plate; 411. First oil inlet; 42. Baffle; 421. Buckle; 5. Cylindrical pin; 6. Steel ball; 7. Retainer. Detailed implementation mode

[0033] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0034] As Figure 1 shown, a micro linear guide rail with snap-in installation includes a linear track 1 and a slide block module. The slide block module is installed on the linear track 1 and can reciprocate relative to the linear track 1. The slide block module includes a slide block body 2, a reverse cover 3 and two metal scrapers 4. A bearing boss 21 is provided at each of the two sides near the bottom surface of the slide block body 2. The two ends of the bearing boss 21 extend beyond the two ends of the slide block body 2 to form four protrusions 22. The reverse cover 3 is formed by splicing two L-shaped frames 31. The L-shaped frame 31 includes an end cover part 311 and a side wall part 312. The end cover part 311 of one L-shaped frame 31 is pin-connected to the side wall part 312 of the other L-shaped frame 31. A first groove 3111 matching the protrusion 22 is opened on the end cover part 311, and a support plate 3121 for supporting the bearing boss 21 is provided on the side wall part 312. The two metal scrapers 4 are respectively snapped onto the end cover parts 311 of the two L-shaped frames 31, and their outer surfaces are on the same horizontal plane as the outer end surfaces of the end cover parts 311.

[0035] In the prior art, the slide block body 2 and the reverse cover 3 are connected by a snap-fastening method. A hook part is provided on the slide block body 2, and a groove is provided on the reverse cover 3. There is also prior art that discloses the reverse cover 3 being set as two frames spliced together. However, they are two frames with a "匚"-shaped structure. The two ends of the "匚"-shaped frame are directly connected to the slide block body 2 through a pin shaft, and a pin hole also needs to be opened on the slide block body 2. The processing and installation are relatively complex. The error range of these structures on a micro linear guide rail is smaller than that of a standard linear guide rail.

[0036] As Figure 2As shown, on the slider body 2, the protrusion 22 has a U-shaped upper surface 221, a Gothic groove 222 is opened on the protrusion 22, and a concave arc groove 211 is provided on both sides of the supporting boss 21. The Gothic groove 222 and the concave arc groove 211 are transitioned by a circular arc.

[0037] like Figure 3 to Figure 6 As shown, on the return cover 3, the side wall portion 312 is provided with a first convex strip 3122 along its length direction, the first convex strip 3122 is provided with a first C-shaped groove 31221, the lower part of the first convex strip 3122 extends horizontally to form a first support plate 31211, and one end of the first support plate 31211 extends below the groove 1 3111. The end of the side wall portion 312 away from the end cover portion 311 is a thick-walled thinning section 3123, and the thick-walled thinning section 3123 is provided with a first pin hole 31231 and a clamping groove 31232.

[0038] The end cover 311 is provided with a second C-shaped groove 3112, one end of which horizontally extends to form a second support plate 31212, and one end of which extends below the first groove 3111. A second pin hole 3113 matching the first pin hole 31231 is provided on the outer wall of the end cover 311 away from the side wall 312. A lubricating oil path 3114 and a second oil inlet 3115 are provided on the end cover 311, and the second oil inlet 3115 is connected to the lubricating oil path 3114.

[0039] like Figure 7 and Figure 8 As shown, when the slider body 2 and the return cover 3 are connected, the protrusion 22 is inserted into the groove 1 3111, ensuring that the U-shaped upper surface 221 is completely fitted with the upper surface of the groove 1 3111, the lower surface of the bearing boss 21 is fitted with the support plate 3121, and the arc surfaces of the upper and lower ends of the Gothic groove 222 on the protrusion 22 are fitted with the arc surfaces of the groove 1 3111. The complete fit and joint action of several surfaces play the role of installation, positioning and fixing for the return cover 3. The first pin hole 31231 of the thick-walled thinning section 3123 on one L-shaped frame 31 of the return cover 3 overlaps with the second pin hole 3113 of the upper end cover 311 of the other L-shaped frame 31. At this time, the cylindrical pin 5 is inserted into the overlapping pin hole to fix the return cover 3 so that it does not move.

[0040] The concave arc channel 211 of the slider body 2 and the first C-shaped groove 31221 and the second C-shaped groove 3112 respectively form two closed circulation channels. Steel balls 6 and a cage 7 are arranged in the closed circulation channels. An installation groove 3116 for the cage 7 is formed on the end cover portion 311. During operation, the steel balls 6 roll infinitely in the closed circulation channels to support the linear motion of the slider module on the linear track 1. The cage 7 can prevent the steel balls 6 from falling off when the slider module disengages from the linear track 1. In this embodiment, the cage 7 is a ball retaining wire with bent portions at both ends, and the bent portions are installed in the installation groove 3116.

[0041] In addition, the cylindrical pin 5 can be a cylindrical pin with a hexagonal cross-section, and the contact surface is hexagonal, providing more contact area than a circle, which helps to provide better stability and load-bearing capacity during connection.

[0042] As Fig. 9 and Fig.10 shown, the cross-section of the metal scraper 4 is in a "U" shape, which includes a cover plate 41 and baffles 42 located at both ends of the cover plate 41. The baffles 42 are perpendicular to the cover plate 41. A buckle 421 that cooperates with the card slot 31232 is provided on the baffle 42. The buckle 421 is a wedge-shaped block. A first oil inlet 411 is formed on the cover plate 41, which corresponds to the second oil inlet 3115.

[0043] The card slot 31232 of the return cover 3 and the buckle 421 of the metal scraper 4 are engaged with each other, fixing the metal scraper 4 and also providing secondary reinforcement for the return cover 3. The cylindrical pin 5, the protrusion 22 of the slider body 2 that cooperate with the groove of the return cover 3, and the buckle 421 of the metal scraper 4 work together to completely fix the return cover 3; the metal scraper 4 can prevent some foreign objects from entering during the operation of the linear guide and affecting its movement; it can also hide the cylindrical pin 5, the cage 7, etc., making the cylindrical pin 5 not easily fall off.

[0044] Fig.11 shown, the cross-section of the metal scraper 4 is in a "U" shape, which includes a cover plate 41 and baffles 42 located at both ends of the cover plate 41. The baffles 42 are perpendicular to the cover plate 41. A buckle 421 that cooperates with the card slot 31232 is provided on the baffle 42. The buckle 421 is a strip-shaped block.

[0045] During assembly, first assemble the slider body 2 with an L-shaped frame 31, connect the two L-shaped frames 31 through the cylindrical pin 5, put the steel ball 6 into the closed circulation channel on one side, and after the steel ball 6 is placed, fix the steel ball 6 through the retainer 7 to prevent it from falling, and then install the steel ball 6 on the other side. After the steel ball 6 and the retainer 7 are installed, install and fix the metal scraper 4, and finally install the entire slider module on the linear rail 1. The entire installation process is completed within 10 to 20 seconds, and after a large number of running tests, there is no looseness.

[0046] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A snap-fitted miniature linear guide rail, comprising a linear rail (1) and a slider module, wherein the slider module is mounted on the linear rail (1) and can reciprocate relative to the linear rail (1), characterized in that: The slider module comprises: A slider body (2), wherein a bearing boss (21) is provided on the bottom surface of the slider body (2) near two side edges, and two ends of the bearing boss (21) extend beyond two ends of the slider body (2) to form four protrusions (22); A return cover (3), the return cover (3) being formed by assembling two L-shaped frames (31), the L-shaped frame (31) comprising an end cover portion (311) and a side wall portion (312), the end cover portion (311) of one L-shaped frame (31) being pin-connected to the side wall portion (312) of the other L-shaped frame (31), the end cover portion (311) being provided with a groove (3111) cooperating with the protrusion (22), and the side wall portion (312) being provided with a support plate (3121) supporting the bearing boss (21); Two metal scrapers (4), the two metal scrapers (4) are respectively engaged on the end cover parts (311) of the two L-shaped frames (31), and the outer surfaces of the two metal scrapers are on the same horizontal plane as the outer end surfaces of the end cover parts (311).

2. The micro linear guide rail according to claim 1, characterized in that: The protrusion (22) has a U-shaped upper surface (221), and the U-shaped upper surface (221) is in contact with the upper surface of the first groove (3111).

3. The micro linear guide rail according to claim 1, characterized in that: The lower surface of the bearing boss (21) is in contact with the upper surface of the support plate (3121).

4. The micro linear guide rail according to claim 1, characterized in that: The side wall portion (312) is provided with a first convex strip (3122) along its length direction, the first convex strip (3122) is provided with a first C-shaped groove (31221), the lower part of the first convex strip (3122) extends horizontally to form a first supporting plate (31211), and one end of the first supporting plate (31211) extends to below the groove 1 (3111).

5. The micro linear guide rail for snap-fit ​​installation according to claim 4, characterized in that: A second C-shaped groove (3112) is provided on the end cover portion (311), one end of the second C-shaped groove (3112) extends horizontally to form a second support plate (31212), and one end of the second support plate (31212) extends below the first groove (3111).

6. The micro linear guide rail for snap-fit ​​installation according to claim 5, characterized in that: An inner concave arc groove (211) is provided on both sides of the bearing boss (21), and the inner concave arc groove (211) and the first C-shaped groove (31221) and the second C-shaped groove (3112) respectively form two closed circulation channels.

7. The micro linear guide rail according to claim 6, characterized in that: A Gothic-style groove (222) is provided on the protrusion (22), and the Gothic-style groove (222) and the inner concave arc groove (211) are transitioned through an arc.

8. The snap-fit ​​mounted miniature linear guide according to claim 6, characterized in that: A steel ball (6) and a retainer (7) are arranged in the closed circulation channel, and a mounting groove (3116) for the retainer (7) is provided on the end cover portion (311).

9. The snap-fit ​​mounted miniature linear guide rail according to claim 1, characterized in that: One end of the side wall portion (312) away from the end cover portion (311) is a thick-walled thinned section (3123), and a first pin hole (31231) and a clamping groove (31232) are provided on the thick-walled thinned section (3123).

10. The snap-fit ​​mounted miniature linear guide rail according to claim 9, characterized in that: A second pin hole (3113) matching with the first pin hole (31231) is formed on the outer wall of the end cover portion (311) away from the side wall portion (312).

11. The snap-fit ​​mounted miniature linear guide rail according to claim 9, characterized in that: A cylindrical pin (5) or a cylindrical pin with a hexagonal cross section is inserted into the first pin hole (31231) and the second pin hole (3113).

12. The snap-fit ​​mounted miniature linear guide according to claim 9, characterized in that: The cross-section of the metal scraping plate (4) is in a "U" shape, which includes a cover plate (41) and baffle plates (42) located at both ends of the cover plate (41). The baffle plates (42) are perpendicularly arranged with respect to the cover plate (41), and a buckle (421) that cooperates with the card slot (31232) is provided on the baffle plate (42).

13. The snap-fit ​​mounted miniature linear guide rail according to claim 12, characterized in that: The buckle (421) is a wedge-shaped block or a strip-shaped block.

14. The snap-fit ​​mounted miniature linear guide rail according to claim 12, characterized in that: A first oil inlet (411) is formed on the cover plate (41).

15. The snap-fit ​​mounted miniature linear guide according to claim 14, characterized in that: A lubricating oil passage (3114) and a second oil inlet (3115) corresponding to the first oil inlet (411) are formed on the end cover part (311), and the second oil inlet (3115) is communicated with the lubricating oil passage (3114).

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