Rolling spline pair and universal shaft convenient to repair

Abstract

The utility model discloses a rolling spline pair and a cardan shaft convenient to repair, and relates to the technical field of transmission equipment, the spline pair comprises a spline shaft, a spline housing, a first fixing ring, a second fixing ring, a rolling shaft, an inner clamping ring and a plurality of screws. According to the rolling spline pair, the annular oil storage groove is formed in the outer wall of the outer circle of the rolling shaft, lubricating grease can be stored, it is guaranteed that the rolling shaft can be fully lubricated when rolling in the installation cavity, friction and abrasion are further reduced due to addition of the lubricating grease, and the durability and the transmission efficiency of the rolling spline pair are improved. Torque is transmitted through rolling of the rolling shaft in the mounting cavity, compared with a traditional sliding friction mode, higher transmission efficiency and lower energy loss are achieved, the risk of jamming during stretching and retracting is reduced, and the jamming possibility is further reduced through clearance fit and sufficient lubrication; meanwhile, the matching design among the rolling shaft, the spline shaft and the spline sleeve ensures the rolling smoothness, and the reliability and the stability of the spline pair are improved.

Description

Technical Field

[0001] This utility model relates to the field of transmission equipment technology, specifically a rolling spline pair and a universal joint that is easy to repair. Background Technology

[0002] In complex mechanical transmission systems, universal joints serve as key components for connecting and transmitting power, and their performance is crucial to the stability and efficiency of the entire transmission system. However, existing universal joint designs, especially their internal splined joints, have revealed a series of problems in practical applications.

[0003] While traditional involute or rectangular splines ensure transmission accuracy, their small tooth backlash and insufficient grease reserves lead to severe wear during long-term high-load operation, resulting in decreased transmission efficiency and shortened equipment life.

[0004] In addition, when existing spline pairs transmit torque, friction and wear cause changes in the fit clearance. Coupled with poor lubrication, this can easily lead to poor expansion and contraction or even jamming, which seriously affects the normal operation of the equipment and causes inconvenience to customers.

[0005] Even more seriously, the existing spline joint structure is complex and difficult to repair locally after wear, often requiring the entire structure to be scrapped, increasing maintenance costs and wasting resources.

[0006] Based on this, a rolling spline pair and an easy-to-repair universal joint are now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0007] The purpose of this invention is to provide a rolling spline pair and a universal joint that is easy to repair, so as to solve the problems of insufficient lubrication, poor extension and retraction, and inconvenient maintenance of existing spline pairs in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rolling spline assembly includes a spline shaft, a spline sleeve, a first retaining ring, a second retaining ring, a roller, an inner retaining ring, and several screws. The outer wall of the spline shaft has several external grooves formed at equal angles, and the inner wall of the spline sleeve has several internal grooves formed at equal angles. Each external groove corresponds to an internal groove and forms a mounting cavity. One end of the first retaining ring has several first mounting holes formed at equal angles on its inner circumferential surface, and one end of the second retaining ring has several second mounting holes formed at equal angles. The first and second mounting holes correspond to the mounting cavity. A roller is disposed inside the mounting cavity. The outer wall of the roller is fixed with an outer diameter matching the mounting cavity. One end of the roller is fixed with a first mounting shaft matching the first mounting hole, and the other end of the roller is fixed with a second mounting shaft matching the second mounting hole.

[0010] Preferably, the outer wall of the roller has an annular oil storage groove.

[0011] Preferably, the outer circumferential surface of one end of the fixing ring is provided with several through holes at equal angles, and the end of the spline sleeve near the fixing ring is provided with several screw holes at equal angles. Each through hole corresponds to a screw hole. One end of the screw passes through the through hole, and the outer wall of the screw is threaded to the inner wall of the screw hole.

[0012] Preferably, the other end of the second fixing ring is provided with an inner retaining ring, the spline sleeve has an inner hole, the inner wall of the inner hole has a retaining ring groove, the outer wall of the second fixing ring is fixed with a fixing ring outer circle, the outer circle of the fixing ring matches the inner hole, and the inner retaining ring matches the retaining ring groove.

[0013] Preferably, there is a significant difference between the hardness of the outer circle of the roller and the hardness of the mounting cavity formed by the outer and inner grooves.

[0014] Preferably, the universal joint has a built-in rolling spline pair conforming to any one of the above.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model has a ring-shaped oil storage groove on the outer wall of the outer circle of the roller, which can store lubricating grease and ensure that the roller can be fully lubricated when it rolls in the mounting cavity. The addition of lubricating grease further reduces friction and wear, and improves the durability and transmission efficiency of the rolling spline pair.

[0017] 2. This utility model transmits torque by rolling the roller within the mounting cavity. Compared with the traditional sliding friction method, it has higher transmission efficiency and lower energy loss. It not only reduces the risk of jamming during extension and retraction, but also further reduces the possibility of jamming through clearance fit and sufficient lubrication. At the same time, the matching design between the roller, spline shaft and spline sleeve ensures smooth rolling and improves the reliability and stability of the spline pair.

[0018] 3. This utility model simplifies the installation and removal of the fixing ring by using a screw and threaded connection, and allows for independent replacement of the rollers, greatly facilitating maintenance. After wear, there is no need to disassemble or replace the entire universal joint; only the rollers need to be replaced. Furthermore, by optimizing the material hardness difference, wear is concentrated on the easily replaceable rollers, extending the life of the spline sleeve and spline shaft, making maintenance more economical and efficient, and facilitating the repair of the universal joint. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the universal joint structure of this utility model.

[0020] Figure 2This is a schematic diagram of the spline shaft of this utility model.

[0021] Figure 3 This is a schematic diagram of the spline sleeve of this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the first fixing ring and the second fixing ring of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the roller of this utility model.

[0024] Figure reference numerals: 1. Splined shaft; 11. Outer groove; 2. Splined sleeve; 21. Snap ring groove; 22. Inner groove; 23. Inner hole; 24. Screw hole; 3. Retaining ring one; 31. Through hole; 32. Mounting hole one; 4. Retaining ring two; 41. Mounting hole two; 42. Outer circle of retaining ring; 5. Roller; 51. Mounting shaft one; 52. Annular oil reservoir; 53. Mounting shaft two; 54. Outer circle of roller; 6. Inner snap ring; 7. Screw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, such as Figures 1-5 As shown, a rolling spline assembly includes a spline shaft 1, a spline sleeve 2, a first fixing ring 3, a second fixing ring 4, a roller 5, an inner retaining ring 6, and several screws 7. The outer wall of the spline shaft 1 has several outer grooves 11 formed at equal angles, and the inner wall of the spline sleeve 2 has several inner grooves 22 formed at equal angles. Each outer groove 11 corresponds to an inner groove 22 and forms a mounting cavity. One end of the first fixing ring 3 has several mounting holes 32 formed at equal angles on its inner circumferential surface, and one end of the second fixing ring 4 has several mounting holes 41 formed at equal angles. The mounting holes 32 and 41 correspond to the mounting cavity. The mounting cavity contains a roller 5, and the outer wall of the roller 5 is fixed with an outer circle 54 that matches the mounting cavity. One end of the roller 5 is fixed with a mounting shaft 51 that matches the mounting hole 32, and the other end of the roller 5 is fixed with a mounting shaft 53 that matches the mounting hole 41.

[0027] In this embodiment, when the spline shaft 1 is subjected to torque, this torque is transmitted to the spline sleeve 2 through the engagement of the outer groove 11 and the inner groove 22, as well as the rolling of the roller 5. Since the roller 5 rolls within the mounting cavity, this transmission method is more efficient than the traditional sliding friction method.

[0028] In an optional embodiment, an annular oil reservoir 52 is formed on the outer wall of the outer circle 54 of the roller.

[0029] It should be noted that by opening an annular oil reservoir 52 on the outer wall of the roller 5, this helps to lubricate the roller 5, reduce friction and wear, and improve the service life of the rolling spline pair.

[0030] In an optional embodiment, a plurality of through holes 31 are provided at equal angles on the outer circumferential surface of one end of the fixing ring 3, and a plurality of screw holes 24 are provided at equal angles on one end of the spline sleeve 2 near the fixing ring 3. Each through hole 31 corresponds to a screw hole 24. One end of the screw 7 passes through the through hole 31, and the outer wall of the screw 7 is threadedly connected to the inner wall of the screw hole 24.

[0031] It should be noted that the threaded connection between screw 7 and screw hole 24 makes the installation and removal of retaining ring 3 relatively simple. When maintenance or replacement of components such as rollers is required, retaining ring 3 can be easily removed simply by unscrewing screw 7, greatly reducing maintenance costs and time costs.

[0032] In an optional embodiment, the other end of the second fixing ring 4 is provided with an inner retaining ring 6, the spline sleeve 2 has an inner hole 23, the inner wall of the inner hole 23 has a retaining ring groove 21, the outer wall of the second fixing ring 4 is fixed with a fixing ring outer circle 42, the fixing ring outer circle 42 matches the inner hole 23, and the inner retaining ring 6 matches the retaining ring groove 21.

[0033] It should be noted that the inner retaining ring 6 serves to fix and lock the position of the retaining ring 4 in the spline sleeve 2.

[0034] In an optional embodiment, there is a significant difference between the hardness of the outer circle 54 of the roller and the hardness of the mounting cavity formed by the outer groove 11 and the inner groove 22.

[0035] It should be noted that the wear is mainly caused on the outer diameter 54 of the roller, thereby effectively extending the service life of the splined shaft 1 and the splined sleeve 2.

[0036] The above embodiments disclose a rolling spline pair and a universal joint that is easy to repair. When the spline shaft 1 is subjected to torque, the torque is transmitted to the spline sleeve 2 through the cooperation of the outer groove 11 and the inner groove 22, and the rolling of the roller 5. An annular oil reservoir 52 is provided on the outer wall of the roller 5 to help lubricate the roller 5 and reduce friction and wear. The first fixing ring 3 and the second fixing ring 4 are connected to the threaded hole 24 of the spline sleeve 2 by screws 7 to fix the rolling spline pair. The threaded connection between the screws 7 and the threaded hole 24 makes the installation and removal of the fixing rings relatively simple. The inner retaining ring 6 provided at the other end of the second fixing ring 4 matches the retaining ring groove 21 inside the spline sleeve 2, which serves to fix and lock the position of the second fixing ring 4 in the spline sleeve 2. There is a significant difference in hardness between the outer circle 54 of the roller and the mounting cavity formed by the outer groove 11 and the inner groove 22, ensuring that wear mainly occurs on the outer circle 54 of the roller. Roller 5 is a wear part and can be replaced independently. When the outer circle 54 of the roller is worn to a certain extent, the working performance of the rolling spline pair can be restored simply by replacing the roller.

[0037] In an optional embodiment, the universal joint has a built-in rolling spline pair conforming to any of the above descriptions.

[0038] It should be noted that this universal joint can effectively meet the needs of various working conditions and extend the life of the equipment.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rolling spline pair, characterized in that Including spline shaft (1), spline sleeve (2), fixed ring one (3), fixed ring two (4), roller (5), inner snap ring (6) and several screws (7), the spline shaft (1) outer wall equal angle is provided with several outer grooves (11), the spline sleeve (2) inner wall equal angle is provided with several inner grooves (22), each outer groove (11) with one inner groove (22) position corresponding, and form an installation cavity;The fixed ring one (3) one end inner circumferential surface equal angle is provided with several mounting hole one (32), the fixed ring two (4) one end equal angle is provided with several mounting hole two (41), several mounting hole one (32), mounting hole two (41) with installation cavity position corresponding, the installation cavity is equipped with roller (5), the roller (5) outer wall is fixed with the roller outer circle (54) matched with installation cavity, the roller (5) one end is fixed with the mounting shaft one (51) matched with mounting hole one (32), the roller (5) other end is fixed with the mounting shaft two (53) matched with mounting hole two (41).

2. A rolling spline pair according to claim 1, wherein The roller outer circle (54) outer wall is provided with annular oil storage groove (52).

3. A rolling spline pair according to claim 1, wherein The fixed ring one (3) one end outer circumferential surface equal angle is provided with several through holes (31), the spline sleeve (2) is close to the one end of fixed ring one (3) equal angle is provided with several screw holes (24), each through hole (31) with one screw hole (24) corresponding, the screw (7) one end passes through the through hole (31), and the screw (7) outer wall is connected with the screw hole (24) inner wall thread.

4. A rolling spline pair according to claim 1, wherein The fixed ring two (4) other end is provided with inner snap ring (6), the spline sleeve (2) is provided with inner hole (23) inside, the inner hole (23) inner wall is provided with snap ring groove (21), the fixed ring two (4) outer wall is fixed with fixed ring outer circle (42), the fixed ring outer circle (42) is matched with inner hole (23), the inner snap ring (6) is matched with snap ring groove (21).

5. A rolling spline pair according to claim 1, wherein The roller outer circle (54) hardness and the installation cavity formed by outer groove (11) and inner groove (22) exist significant difference.

6. A universal shaft equipped with the rolling spline pair according to any one of claims 1 to 5, which is easy to repair, characterized by The universal shaft is built in the rolling spline pair according to any one of the above.

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