High-dust-proof rolling linear guide rail pair

Abstract

The invention relates to a high-dust-proof rolling linear guide rail pair which comprises a guide rail, a sliding block body and sealing reversers arranged at the two ends of the sliding block body, the guide rail and the sliding block body are matched with each other and connected in a sliding mode, a ball raceway is arranged between the guide rail and the sliding block body, and a ball flowing hole is formed in the sliding block body; each sealing reverser comprises a reverser, an end seal and a metal scraper, a reversing raceway communicated with the ball raceway and the ball flowing hole is arranged in the reverser, the ball raceway, the ball flowing hole and the reversing raceways in the sealing reversers at the two ends of the sliding block body form a circulating raceway, and balls are arranged in the circulating raceway; a groove is formed in the side, away from the sliding block body, of the reverser, the end seal is arranged in the groove and integrally formed with the reverser in an injection molding mode, the end seal makes contact with the guide rail and is in sliding connection with the guide rail, and the metal scraper is fixed to the side, away from the sliding block body, of the reverser and limits the end seal in the groove. The end seal and the reverser are integrally formed, so that the end seal and the guide rail can be accurately positioned, and a good sealing and dustproof effect is achieved.

Description

Technical Field

[0001] This invention relates to a high dustproof rolling linear guide pair, belonging to the technical field of linear guide pairs. Background Technology

[0002] Linear guide pairs typically consist of guide rails, sliders, return mechanisms, balls, and end seals. The end seals serve to prevent dust. However, due to insufficient manufacturing and installation precision of traditional end seals, the uniformity of the interference fit between the end seal and the guide rail is poor, resulting in an unsatisfactory sealing effect for the guide pair. In some relatively harsh working conditions, the lifespan of the guide pair can be significantly affected.

[0003] For example, a linear guide pair disclosed in patent CN201520974563.0 has end seals at both ends of the slider connected by bolts. Since the positioning is only achieved by bolts, the positioning accuracy between the end seals and the guide rail cannot be guaranteed, resulting in poor dustproof performance and thus causing problems such as short service life of the guide pair. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a high dustproof rolling linear guide pair with high end sealing positioning accuracy.

[0005] To achieve the above objectives, the technical solution proposed by this invention is as follows: a high dustproof rolling linear guide pair, comprising a guide rail and a slider body that are slidably connected to each other, wherein a ball raceway is provided between the guide rail and the slider body, and a ball hole is provided on the slider body; the guide rail pair further comprises sealing return devices disposed at both ends of the slider body, wherein the sealing return device comprises a return device, an end seal and a metal scraper, wherein a return raceway communicating with the ball raceway and the ball hole is provided in the return device, and the ball raceway, the ball hole and the return raceway in the sealing return device at both ends of the slider body constitute a circulating raceway, wherein a ball is provided in the circulating raceway; The return device has a groove on the side away from the slider body. The end seal is set in the groove and is integrally injection molded with the return device. The end seal contacts and slides with the guide rail. The metal scraper is fixed on the side of the return device away from the slider body and restricts the end seal in the groove.

[0006] A further design of the above technical solution is as follows: it also includes a return device tube, the return device tube including a positioning tube and a positioning sleeve disposed at one end of the positioning tube, the return device is provided with an embedding groove on the side near the slider body corresponding to the return raceway, the return raceway is provided with a protruding positioning arc at the opening corresponding to the ball hole, the positioning sleeve is embedded in the embedding groove, one end of the positioning tube and the positioning arc are respectively inserted into the positioning sleeve from both ends and abut against each other, the other end of the positioning tube is inserted into the ball hole, the ball raceway, the positioning tube and the return raceway in the sealed return device at both ends of the slider body constitute a circulating raceway.

[0007] The positioning sleeve has a positioning block on the side near the guide rail, and the side of the positioning block away from the guide rail is V-shaped. The end of the slider body has a V-shaped groove near the guide rail, and the positioning block is embedded in the V-shaped groove.

[0008] The return device and the end seal are integrally injection molded using a double-shot process.

[0009] The end seal is formed by injection molding of soft rubber. At the contact point between the end seal and the guide rail, an end seal lip is formed that extends obliquely toward the guide rail. The front angle of the end seal lip is greater than the rear angle.

[0010] The reversing device has a scraper groove on one side corresponding to the metal scraper, the side wall of the scraper groove forms a positioning surface, the metal scraper is embedded in the scraper groove and its four sides abut against the positioning surface.

[0011] The metal scraper has a buckle at the bottom, and the reversing device has a slot that cooperates with the buckle at the corresponding position. The metal scraper, the reversing device, and the slider body each have a screw hole at the corresponding position. The metal scraper is fixed to the reversing device by the cooperation of the buckle and the slot and by the screw set in the screw hole. The reversing device is fixed to the slider body by the screw set in the screw hole.

[0012] The outer diameter of the positioning tube matches the inner diameter of the flow ball orifice, and the inner diameter of the positioning sleeve matches the outer diameter of the positioning tube.

[0013] Each of the two sealing return devices at both ends of the slider body is provided with a return device insertion tube, and the two positioning insertion tubes corresponding to each other in the two return device insertion tubes at both ends of the slider body are connected to each other in the corresponding flow ball holes.

[0014] The circulating raceway is provided in four sets, which are symmetrically arranged on both sides of the guide rail. The return tube has a symmetrical structure, and the positioning sleeves located on both sides of the guide rail are connected by connecting plates.

[0015] The beneficial effects of this invention are as follows: The linear guide pair of the present invention integrates the end seal and the return device by using a double-shot mold to inject different materials in two stages, thereby achieving a high degree of coaxiality between the end seal and the return device. Since the linear guide pair requires high positioning accuracy between the return device, the guide rail, and the slider during manufacturing, integrating the end seal and the return device into one piece ensures precise positioning between the end seal and the guide rail, resulting in a better sealing and dustproof effect.

[0016] In this invention, the lip of the end seal extends inclined towards the guide rail. The high positioning accuracy of the end seal and the guide rail can improve the sealing and dust removal effect, making it more suitable for applications with relatively harsh working conditions and achieving high dustproof performance of the guide rail pair.

[0017] In this invention, the reversing device insert is precisely positioned by the positioning insert, the flow ball hole of the slider body, and the reversing roller of the reversing device, and is positioned by the positioning block and the slider raceway, thereby achieving high-precision positioning of the reversing device and the slider body by the reversing block insert. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the high dustproof rolling guide pair structure of the present invention; Figure 2 This is a schematic diagram of the sealed return device structure; Figure 3 Schematic diagram of the end-sealing lip structure; Figure 4 Schematic diagram of the positioning structure for a metal scraper; Figure 5 This is a schematic diagram of the positioning structure of the reversible cannula and the slider; Figure 6 Schematic diagram of the sealing return device assembly; Figure 7 This is a schematic diagram of the positioning structure of the reversing device and the reversing device cannula. Figure 8 Schematic diagram of the positioning structure of the slider body and the reversing tube. In the diagram: 1-guide rail, 2-screw, 3-sealing return device, 4-return block insert, 5-slider body, 6-return device; 7-end seal, 8-metal scraper, 9-metal return device lip, 10-end seal lip, 11-front angle, 12-rear angle, 13 / 14 / 15-return device positioning surface, 16-buckle, 17-positioning insert, 18-V-groove, 19-positioning arc, 20-positioning sleeve, 21-flow ball hole, 22-positioning block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0020] like Figure 1 As shown, the high dustproof rolling linear guide pair of this embodiment includes a guide rail 1 and a slider body 5 that are slidably connected to each other, and sealing return devices 3 disposed at both ends of the slider body. A ball bearing raceway is provided between the guide rail 1 and the slider body 5, and a ball bearing hole is provided on the slider body; combined with... Figure 2 As shown, the sealing return device 3 includes a return device 6, an end seal 7, and a metal scraper 8. The return device 6 has a return raceway that communicates with the ball raceway and the ball hole. The ball raceway, the ball hole, and the return raceways in the sealing return device at both ends of the slider body together constitute a circulating raceway, and the circulating raceway contains balls.

[0021] like Figure 2As shown, the return valve 6 has a groove on the side away from the slider body. The end seal 7 is set in the groove and is integrally injection molded with the return valve 6 using a double-injection process. That is, the material for making the return valve 6 is first injected into the mold to form the return valve 6, and then the material for making the end seal 7 is injected a second time to form the end seal 7. Thus, the return valve 6 and the end seal 7 are integrally molded, giving them good coaxiality and achieving the same high precision manufacturing of the end seal 7 as the return valve. Figure 3 As shown, the end seal 7 is made of soft rubber. The end seal 7 contacts and slides with the guide rail 1. The end seal 7 forms an end seal lip 10 that extends obliquely towards the guide rail at the contact point (i.e., the inner edge) with the guide rail 1. The front angle 12 (angle a) of the end seal lip 10 is larger than the rear angle 11 (angle b), which makes the lip small and flexible, and the root large and strong, thereby achieving a high scraping effect and realizing the high dustproof performance of the guide rail pair.

[0022] like Figure 4 As shown, the metal scraper 8 is fixed to the side of the return device 6 away from the slider body 5 and the end seal 7 is confined in the groove. The inner edge of the metal scraper 8 is also provided with a metal return device lip 9. The return device 6 is provided with a scraper groove on the side of the metal scraper. The side wall of the scraper groove forms multi-directional positioning surfaces 13, 14 and 15. The metal scraper 8 is embedded in the scraper groove and the corresponding side abuts against the positioning surface for precise positioning, so that the metal scraper 8 obtains a good positioning effect. This results in a high-precision relative positional relationship between the metal return device lip 9 and the end seal lip 10, which makes the fit between the metal scraper and the guide rail high, the scraping effect on the guide rail good, and the dustproof performance good.

[0023] Combination Figure 6 As shown, the metal scraper 8 has a buckle at its bottom, and the return device 6 has a groove 16 at the corresponding position that cooperates with the buckle. The metal scraper, the return device, and the slider body each have screw holes at the corresponding positions. The metal scraper is fixed to the return device by the cooperation of the buckle and the groove and by the screws set in the screw holes. The return device is fixed to the slider body by the screws set in the screw holes. Thus, the return device 6, the end seal 7, and the metal scraper 8 form an integrated sealing return device assembly. When assembling the guide rail pair, this integrated sealing return device assembly is directly installed onto the guide rail pair as a whole, which improves the assembly efficiency and sealing assembly accuracy, and achieves high dustproof performance of the guide rail pair. Example 2

[0024] This embodiment is a further design based on Embodiment 1, specifically combined with... Figure 1 , Figure 5 and Figure 7As shown, this embodiment also includes a reversing device tube 4, which includes a positioning tube 17 and a positioning sleeve 20 disposed at one end of the positioning tube 17. The reversing device 6 has an embedding groove on the side near the slider body 5 corresponding to the reversing raceway. The reversing raceway in the reversing device 6 has a protruding positioning arc 19 at the opening corresponding to the ball hole 21. During installation, one end of the positioning tube 17 is inserted into the ball hole 21, and the other end is inserted into the positioning sleeve 20. Then, the reversing device 6 is connected to the positioning sleeve 20, so that the positioning arc is inserted into the positioning sleeve 20 from the other end of the positioning sleeve 20, thereby making one end of the positioning tube and the positioning sleeve 20 fit together. The arcs are inserted into the positioning sleeves from both ends and abut against each other, so that the positioning sleeves 20 are embedded in the embedding grooves; the outer diameter of the positioning tube 17 matches the inner diameter of the ball hole 21, and the inner diameter of the positioning sleeve matches the outer diameter of the positioning tube; each of the two sealing return devices at both ends of the slider body 5 is provided with a return device tube 4, and the two positioning tubes 17 corresponding to each other in the two return device tubes 4 at both ends of the slider body are connected to each other in the corresponding ball hole 21, so that the channel formed by the two positioning tubes 17 is smoothly connected. In this embodiment, the ball raceway, the positioning tube 17 and the return raceway in the sealing return device at both ends of the slider body 5 together constitute the circulating raceway.

[0025] Combination Figure 8 As shown, the positioning sleeve 20 has a positioning block 22 on the side near the guide rail 1. The positioning block protrudes towards the side near the slider body 5. The protruding part of the positioning block 22 is V-shaped away from the guide rail 1. The end of the slider body 5 near the guide rail (between the two raceways) has a V-groove, and the positioning block 22 is embedded in the V-groove. The return block insertion tube 4 integrates the return block 6 and the positioning insertion tube into a single structure. The positioning insertion tube 17 is precisely positioned with the ball hole 21 of the slider body 5, and is precisely positioned at the precision-ground slider raceway of the slider body 5 by the positioning block 22. Thus, the return block insertion tube 4 achieves high-precision positioning between the return block 6 and the slider body 5, improving the sealing effect of the integrated sealing return device assembly.

[0026] In this embodiment, there are four sets of circulating raceways, which are symmetrically arranged on both sides of the guide rail 1. The corresponding return tube 4 has a symmetrical structure, and the positioning sleeves located on both sides of the guide rail are connected by connecting plates.

[0027] This embodiment adopts an integrated component design for the return device, end seal, and metal scraper seal, which significantly improves the precision compared to traditional processes, achieving high dustproof performance of the guide rail pair. It also employs precision positioning assembly to achieve accurate matching between the seal and the guide rail, improving the sealing and scraping effect, making it more adaptable to relatively harsh operating conditions and achieving high dustproof performance of the guide rail pair.

[0028] The technical solutions of the present invention are not limited to the above embodiments. All technical solutions obtained by equivalent substitution fall within the scope of protection claimed by the present invention.

Claims

1. A high dustproof rolling linear guide pair, comprising a guide rail and a slider body that are slidably connected to each other, wherein a ball bearing raceway is provided between the guide rail and the slider body, and a ball bearing hole is provided on the slider body; characterized in that: It also includes sealing return devices disposed at both ends of the slider body. The sealing return device includes a return device, an end seal, and a metal scraper. The return device has a return raceway that communicates with the ball raceway and the ball hole. The ball raceway, the ball hole, and the return raceway in the sealing return device at both ends of the slider body constitute a circulating raceway, and the circulating raceway contains balls. The return device has a groove on the side away from the slider body. The end seal is disposed in the groove and is integrally injection molded with the return device. The end seal contacts and slides with the guide rail. The metal scraper is fixed on the side of the return device away from the slider body and restricts the end seal within the groove.

2. The high dustproof rolling linear guide pair according to claim 1, characterized in that: It also includes a reversing device tube, which includes a positioning tube and a positioning sleeve disposed at one end of the positioning tube. The reversing device has an embedding groove on the side near the slider body corresponding to the reversing raceway. The reversing raceway has a protruding positioning arc at the opening corresponding to the ball hole. The positioning sleeve is embedded in the embedding groove. One end of the positioning tube and the positioning arc are respectively inserted into the positioning sleeve from both ends and abut against each other. The other end of the positioning tube is inserted into the ball hole. The ball raceway, the positioning tube, and the reversing raceway in the sealed reversing device at both ends of the slider body constitute a circulating raceway.

3. The high dustproof rolling linear guide pair according to claim 2, characterized in that: The positioning sleeve has a positioning block on the side near the guide rail, and the side of the positioning block away from the guide rail is V-shaped. The end of the slider body has a V-shaped groove near the guide rail, and the positioning block is embedded in the V-shaped groove.

4. The high dustproof rolling linear guide pair according to claim 3, characterized in that: The return device and the end seal are integrally injection molded using a double-shot process.

5. The high dustproof rolling linear guide pair according to claim 4, characterized in that: The end seal is formed by injection molding of soft rubber. At the contact point between the end seal and the guide rail, an end seal lip is formed that extends obliquely toward the guide rail. The front angle of the end seal lip is greater than the rear angle.

6. The high dustproof rolling linear guide pair according to claim 5, characterized in that: The reversing device has a scraper groove on one side corresponding to the metal scraper, the side wall of the scraper groove forms a positioning surface, the metal scraper is embedded in the scraper groove and its four sides abut against the positioning surface.

7. The high dustproof rolling linear guide pair according to claim 6, characterized in that: The metal scraper has a buckle at the bottom, and the reversing device has a slot that cooperates with the buckle at the corresponding position. The metal scraper, the reversing device, and the slider body each have a screw hole at the corresponding position. The metal scraper is fixed to the reversing device by the cooperation of the buckle and the slot and by the screw set in the screw hole. The reversing device is fixed to the slider body by the screw set in the screw hole.

8. The high dustproof rolling linear guide pair according to claim 7, characterized in that: The outer diameter of the positioning tube matches the inner diameter of the flow ball orifice, and the inner diameter of the positioning sleeve matches the outer diameter of the positioning tube.

9. The high dustproof rolling linear guide pair according to claim 8, characterized in that: Each of the two sealing return devices at both ends of the slider body is provided with a return device insertion tube, and the two positioning insertion tubes corresponding to each other in the two return device insertion tubes at both ends of the slider body are connected to each other in the corresponding flow ball holes.

10. The high dustproof rolling linear guide pair according to claim 9, characterized in that: The circulating raceway is provided in four sets, which are symmetrically arranged on both sides of the guide rail. The return tube has a symmetrical structure, and the positioning sleeves located on both sides of the guide rail are connected by connecting plates.

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