Dustproof sealing cross shaft universal joint assembly

Abstract

The utility model discloses a dustproof sealing cross shaft universal joint assembly which comprises a main body, connecting shafts are arranged on the periphery of the main body, oil seals and sleeves are sequentially connected outside the connecting shafts in a sleeved mode, an inward-retracting attaching portion is arranged between the main body and the connecting shafts, an end sleeve is arranged at the opening end of each sleeve, and the end sleeve is connected with the corresponding oil seal in a sleeved mode. The inner side of the end sleeve is attached to the outer surface of the oil seal, the end sleeve and the inward-retracting attaching part are sleeved with the same sealing assembly, the sealing assembly comprises a first sealing piece and a second sealing piece which are connected in a staggered and sleeved mode and is used for sealing and dust prevention between the universal joint assemblies, and the diameter of the sleeve is the same as that of the inward-retracting attaching part. A chamfer is arranged on the edge of the inward-contracting attaching part. According to the cross shaft universal joint assembly, the first sealing piece and the second sealing piece in the sealing assembly can be used for conducting dustproof treatment on the connecting end of the sleeve of the universal joint and the main body, and the sealing performance between the universal joint assemblies is improved through the transition piece and the guide strip in the main body.

Description

Technical Field

[0001] The utility model relates to a universal joint, in particular to a dustproof and sealed cross-shaft universal joint component. Background Art

[0002] A universal joint is a mechanical part that realizes variable-angle power transmission. It is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission device of the automobile drive system. A cross-axis universal joint, also known as a cross-axis universal joint, is a mechanical connection device whose main function is to realize power transmission between mutually perpendicular axes. It guides the relative rotation between the cross axis and the connecting axis through the internal ball cage structure.

[0003] At present, the main part of the cross-axis universal joint is composed of a cross-axis and the connecting shafts on its four sides. The outside of the connecting shaft is sleeved with an oil seal and a sleeve with balls in sequence. The sleeve and the oil seal are sealed by fitting the sleeve with the outer surface of the oil seal. However, the dustproof effect of this cross-axis universal joint is poor. Dust will be mixed in the connection between the sleeve and the oil seal, as well as the oil seal and the cross-axis, causing blockage at the connection, affecting the use of the cross-axis universal joint. Based on the above reasons, it is necessary to design a cross-axis universal joint assembly that can perform dustproof treatment between the various structures of the cross-axis universal joint and increase the sealing between the universal joint components. Utility Model Content

[0004] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a dustproof and sealed cross-axis universal joint assembly, which realizes the dustproof treatment of the structure between the cross-axis universal joint assemblies and increases the sealing performance between the universal joint assemblies.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A dustproof sealing cross-axis universal joint assembly comprises a main body, connecting shafts are arranged around the main body, and an oil seal and a sleeve are sequentially sleeved on the outside of the connecting shaft, an inward-retracted fitting portion is arranged between the main body and the connecting shaft, an end sleeve is arranged at the open end of the sleeve, and the inner side of the end sleeve is fitted with the outer surface of the oil seal, the end sleeve and the outer sleeve of the inward-retracted fitting portion are provided with the same sealing component, and the sealing component comprises a first sealing sheet and a second sealing sheet which are staggered and sleeved, and is used for sealing and dustproofing between universal joint components.

[0007] Preferably, the diameter of the sleeve is the same as the diameter of the inwardly-retracted fitting portion, and the edge of the inwardly-retracted fitting portion is provided with a chamfer.

[0008] Preferably, two ends of the end sleeve are respectively located at the inner and outer sides of the sleeve, and the end sleeve is made of rubber material.

[0009] Preferably, an edge portion is provided at the end of the end sleeve, and a plane portion is provided at one end of the end sleeve close to the sealing assembly.

[0010] Preferably, the sealing assembly is made of elastic metal material, the first sealing sheet includes a first through sheet and a first cover ring fixed on the outside of the first through sheet, the second sealing sheet includes a second through sheet and a second cover ring fixed on the outside of the second through sheet, the first through sheet and the second through sheet are located between the inward fitting portion and the end sleeve, and the first through sheet and the second through sheet are fitted with the outer surfaces of the main body and the sleeve.

[0011] Preferably, the first penetration piece is sleeved in the second cover ring, and the second penetration piece is sleeved in the first cover ring.

[0012] Preferably, the main body is a hollow structure, transition pieces are arranged around the main body, the inner side of the transition pieces is inclined toward the connecting axis, and a guide strip is arranged through the main body.

[0013] Compared with the prior art, the dustproof sealing cross-axis universal joint assembly provided by the utility model can perform dustproof treatment on the gap between the cross-axis universal joint assemblies and increase the sealing performance between the universal joint assemblies. Specifically, the use of the sleeve and the end sleeve, and the setting of the sealing assembly between the sleeve and the inward fitting portion, facilitate the inner surface of the end sleeve to fit on the outer side of the oil seal, so as to achieve the inner sealing of the sleeve and the connecting shaft. The flat portion of the end sleeve can fit on the first through-piece and the second through-piece of the sealing assembly, so as not to affect the rotation of the sleeve, while the end of the sleeve is sealed. The staggered first and second sealing sheets cover the outer sides of the end sleeve and the inward fitting portion, so as to achieve the integrated fitting of the main body and the sleeve, thereby reducing the generation of gaps and achieving the dustproof use of the cross-axis universal joint assembly, which is very beneficial for the use of the cross-axis universal joint.

[0014] In addition, by using a transition piece near the connecting shaft of the main body and passing a guide strip through the main body, the lubricating oil in the main body can be guided to the surrounding sleeves, lubricating the gap between the sleeve and the connecting shaft while achieving sealing, which is very beneficial to the use of the cross-axis universal joint.

[0015] It should be understood that the general description and detailed description herein are exemplary and explanatory only and are not intended to restrict the present disclosure.

[0016] This application document provides various implementations or exemplary overviews of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the dustproof and sealed cross-axis universal joint assembly of the utility model;

[0018] Figure 2 This is an exploded view of the partial structure of the main body and the sleeve in the dust-proof and sealed cross universal joint assembly of the present utility model;

[0019] Figure 3 This is a cross-sectional view of the partial structure of the main body and the sleeve in the dust-proof and sealed cross universal joint assembly of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of another structural form of the dust-proof and sealed cross universal joint assembly of the present utility model;

[0021] Figure 5 is Figure 4 an enlarged view of the structure of A in;

[0022] Figure 6 This is a cross-sectional view of the main body in the dust-proof and sealed cross universal joint assembly of the present utility model.

[0023] Main reference numerals:

[0024] 1. Main body; 11. Connecting shaft; 111. Inner retracted fitting part; 12. Oil seal; 13. Sleeve; 2. End sleeve; 21. Edge part; 22. Flat part; 31. First sealing piece; 32. Second sealing piece; 311. First through piece; 312. First cover ring; 321. Second through piece; 322. Second cover ring; 41. Transition piece; 42. Guide strip. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the following further describes the embodiments of the present disclosure clearly and in detail with reference to the accompanying drawings of the present embodiment. Note: The described embodiments are part of the embodiments of the present disclosure, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0026] As shown in the attached Figure 1 and the attached Figure 2As shown, the dust-proof and sealed cross universal joint assembly provided by the embodiment of the present utility model is used for power transmission between mutually perpendicular shafts. The cross universal joint assembly includes a main body 1. Connecting shafts 11 are arranged around the main body 1. An oil seal 12 and a sleeve 13 are sequentially sleeved outside the connecting shaft 11. The oil seal 12 is used for the preliminary sealing between the sleeve 13 and the connecting shaft 11. Through the connection between the sleeve 13 and the connecting shaft 11, power transmission is carried out at the four shaft ends. Then, an inward-fitting portion 111 is arranged between the main body 1 and the connecting shaft 11, and the diameter of the inward-fitting portion 111 is set to be the same as the diameter of the sleeve 13, which is convenient for the integrated assembly of the sleeve 13 and the connecting shaft 11, and reduces the gap and drop between the various components of the cross universal joint. At the same time, the inner side of the end sleeve 2 is sleeved on the outer surface of the oil seal 12, so that the end sleeve 2 fits and presses against the outer surface of the oil seal 12, realizing the sealing between the sleeve 13, the oil seal 12 and the connecting shaft 11, and realizing the sealing treatment on the outside of the sleeve 13. Then, the same sealing assembly is sleeved outside the end sleeve 2 and the inward-fitting portion 111. The sealing assembly is composed of a first sealing piece 31 and a second sealing piece 32 that are alternately sleeved. When assembling the universal joint assembly, the sealing assembly can be sleeved between the end sleeve 2 and the inward-fitting portion 111 to realize the sealing treatment on the outside of the main body 1 and the sleeve 13, reduce the assembly gap, and improve the sealing effect between the cross universal joint assemblies.

[0027] In order to reduce the gap between the sleeve 13 and the main body 1, as Figure 2 and 3 shown, the sleeve 13 and the inward-fitting portion 111 can be set to have the same diameter, which is convenient for the integrated use when the sleeve 13 is connected to the main body 1. Also, through the chamfer setting at the edge of the inward-fitting portion 111, the acute angle end of the main body 1 can be reduced, which is convenient for the penetration of the sealing assembly. At the same time, the main body 1 and the sleeve 13 are sleeved to reduce the generation of gaps, prevent the entry of dust, and increase the connection sealing performance between the inward-fitting portion 111 and the sealing assembly.

[0028] In some embodiments, in order to better fit the sleeve 13 and the connecting shaft 11 and perform sealing treatment on the end of the sleeve 13, as Figure 3 and 4 shown, the end sleeve 2 can be arranged with a U-shaped cross-section on the inner and outer sides of the sleeve 13. By using the rubber material of the end sleeve 2, it can not only be more firmly connected to the connecting shaft 11, but also be used in combination with the oil seal 12 and the sealing assembly by using the rubber material of the end sleeve 2, thereby realizing the connection sealing performance of the universal joint assembly.

[0029] In order to further improve the connection sealing performance between the end sleeve 2 and the connecting shaft 11, as Figure 4As shown, an edge portion 21 can be provided at the end of the end sleeve 2, and the end of the end sleeve 2 close to the sealing assembly is provided as a flat portion 22, which can improve the connection sealing between the drum and the connecting shaft 11 while not affecting the rotation of the sleeve 13, thereby realizing the dust-proof treatment of the sleeve 13 and the main body 1.

[0030] Among them, it is worth noting that, as Figures 3 - 5 shown, the first sealing piece 31 is composed of a first through piece 311 and a first cover ring 312 fixed on the outer side of the first through piece 311. The second sealing piece 32 includes a second through piece 321 and a second cover ring 322 fixed on the outer side of the second through piece 321. The first through piece 311 and the second through piece 321 are located between the inward-fitting portion 111 and the end sleeve 2. The first cover ring 312 and the second cover ring 322 are attached to the outer surfaces of the main body 1 and the sleeve 13. Through the staggered sleeving of the first sealing piece 31 and the second sealing piece 32, it can be limited on the universal joint, and the gap of the universal joint assembly can be dust-proof treated. When the cross-axis universal joint is applied to a transmission machine, the outer side of the sleeve 13 is the connecting end of the universal joint, and the sealing assembly does not fit on the surface of the transmission machine.

[0031] As Figure 4 and 5 shown, when the sealing assembly is in use, the second sealing piece 32 will be sleeved on the main body 1 first, and then the first sealing piece 31 will be sleeved on the outer side of the second sealing piece 32, so that the first through piece 311 is sleeved in the second cover ring 322, and the second through piece 321 is sleeved in the first cover ring 312.

[0032] Similarly, in some embodiments, the inner side of the cross-axis universal joint assembly can be sealed by filling lubricating oil inside. As Figure 6 shown, before the cross-axis universal joint is used, lubricating oil can be filled in the hollow structure of the main body 1. Then, transition pieces 41 are provided around the inside of the main body 1, and the inner side of the transition piece 41 inclines towards the outer end of the connecting shaft 11 to facilitate the interception of lubricating oil and avoid excessive leakage of lubricating oil. Then, guiding strips 42 are provided in the main body 1, and the guiding strips 42 penetrate through the connecting shafts 11 on four sides to realize the transportation of lubricating oil, providing favorable conditions for the inner sealing of the connecting shafts 11 and the sleeve 13 on four sides. When the cross-axis universal joint is in use, the inner side of the main body 1 can be provided with cavities of different volumes for storing lubricating oil according to the application occasion. The penetration of the guiding strips 42 through the main body 1 facilitates guiding the lubricating oil in the middle of the main body 1 to the edge of the connecting shaft 11, lubricating the sleeve 13 and sealing the gap between the sleeve 13 and the connecting shaft 11 at the same time.

[0033] Of course, the above description is the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A dust-proof sealed cross universal joint assembly, comprising a main body (1), connecting shafts (11) are arranged around the main body (1), an oil seal (12) and a sleeve (13) are sequentially sleeved outside the connecting shafts (11), and it is characterized in that: An inwardly converging fitting part (111) is arranged between the main body (1) and the connecting shafts (11), an end sleeve (2) is arranged at the open end of the sleeve (13), and the inner side of the end sleeve (2) is in fit with the outer surface of the oil seal (12), and a same sealing assembly is sleeved outside the end sleeve (2) and the inwardly converging fitting part (111); The sealing assembly includes first sealing pieces (31) and second sealing pieces (32) which are staggeredly sleeved, and is used for sealing and dust-proof between the universal joint assemblies.

2. The dust-proof sealed cross universal joint assembly according to claim 1, characterized in that, The diameter of the sleeve (13) is the same as that of the inwardly converging fitting part (111), and a chamfer is arranged at the edge of the inwardly converging fitting part (111).

3. The dust-proof sealed cross universal joint assembly according to claim 1, wherein, Both ends of the end sleeve (2) are respectively located inside and outside the sleeve (13), and the end sleeve (2) is made of rubber material.

4. The dust-proof sealed cross universal joint assembly according to claim 2, wherein An edge part (21) is arranged at the end of the end sleeve (2), and a flat part (22) is arranged at one end of the end sleeve (2) close to the sealing assembly.

5. The dust-proof sealed cross universal joint assembly according to claim 1, characterized in that The sealing assembly is made of elastic metal material, the first sealing piece (31) includes a first through piece (311) and a first cover ring (312) fixedly arranged outside the first through piece (311), the second sealing piece (32) includes a second through piece (321) and a second cover ring (322) fixedly arranged outside the second through piece (321), the first through piece (311) and the second through piece (321) are located between the inwardly converging fitting part (111) and the end sleeve (2), and the first through piece (311) and the second through piece (321) are in fit with the outer surfaces of the main body (1) and the sleeve (13).

6. The dust-proof sealed cross shaft universal joint assembly according to claim 5, wherein The first through piece (311) is sleeved in the second cover ring (322), and the second through piece (321) is sleeved in the first cover ring (312).

7. The dust-proof sealed cross universal joint assembly according to claim 1, characterized in that, The main body (1) is of a hollow structure, transition pieces (41) are arranged around the main body (1), the inner sides of the transition pieces (41) incline towards the connecting shafts (11), and a guiding strip (42) is arranged through the main body (1).

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