Universal joint assembly and vehicle

Abstract

According to the universal joint assembly, an opponent piece comprises an opponent piece shell and a first shaft body, a shaft hole with an opening in one end is formed in the opponent piece shell, a universal joint comprises a universal joint shell with an inserting part, the inserting part is inserted into the shaft hole through the opening, and the first shaft body is arranged on the first shaft body. The first shaft body is sleeved with the insertion part, a torque transmission structure is arranged between the insertion part and the first shaft body, the insertion part and the first shaft body are connected through the connecting piece, the oil seal can be limited between the opponent piece shell and the universal joint shell, and the oil seal can seal a gap between the opponent piece shell and the universal joint shell. The insertion part and the first shaft body which are connected together are rotatably arranged in the shaft hole through a bearing assembly. According to the universal joint assembly, the connecting piece can be prevented from being exposed, when the universal joint and the opponent piece are assembled together only through the connecting piece, the number of parts is small, the assembling process is simple, time and labor are saved, and the arranged oil seal can well protect the bearing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a universal joint assembly. Meanwhile, the utility model also relates to a vehicle using the universal joint assembly. Background Art

[0002] The drive shaft is an important component of the automobile transmission system. Its main function is to transfer the torque and motion transmitted by the transfer case to the main reducer. The main reducer transmits the torque and motion to the wheels through the drive shaft to drive the wheels to move. When the drive shaft is connected to the main reducer or transfer case, it is generally connected through a universal joint. Specifically, the universal joint needs to be fastened to the flange of the transfer case or the front reducer by bolts or screws.

[0003] With the development of society, the requirements for the integration of vehicle transmission systems are getting higher and higher, which can reduce weight and save space for the layout of other components such as battery packs. At present, it is hoped that a smaller transmission will be arranged on the vehicle, which will result in a shorter distance between the input flange of the main reducer and the output flange of the transfer case, a compact layout of the transmission shaft, tool interference when tightening bolts or screws, difficult installation process, long installation time, and affect the production cycle.

[0004] In addition, the design of the front main reducer flange and transfer case flange in the transmission system results in a relatively large overall weight of the transmission system, which is not conducive to lightweighting of the entire vehicle. Utility Model Content

[0005] In view of this, the utility model aims to provide a universal joint assembly, so as to reduce the total weight, have fewer parts and components, and facilitate assembly.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A universal joint assembly, comprising a universal joint, a counter piece, a connecting piece, a bearing assembly and an oil seal;

[0008] The opponent piece comprises an opponent piece housing and a first shaft body, and an shaft hole with one end open is provided in the opponent piece housing;

[0009] The universal joint comprises a universal joint housing having an inserting portion, the inserting portion is inserted into the shaft hole through the opening, the inserting portion is sleeved outside the first shaft body, and a torque transmission structure is provided between the inserting portion and the first shaft body;

[0010] The connecting member connects the insert portion and the first shaft body, and can restrict the oil seal between the counterpart housing and the universal joint housing. The insert portion and the first shaft body connected together are rotatably disposed in the shaft hole through the bearing assembly.

[0011] Further, the connecting member includes a bolt connecting the first shaft and the inserting portion, and the bolt is threadedly connected to the first shaft;

[0012] An anti-loosening structure is provided between the insertion portion and the bolt, the anti-loosening structure comprising a first retaining spring groove provided in the insertion portion, and a first retaining spring embedded in the first retaining spring groove, the first retaining spring being blocked at one side of the bolt to prevent the bolt from being loosened; and / or,

[0013] A first tool fitting portion is provided at one end of the bolt away from the first shaft, and the first tool fitting portion is used to cooperate with an external tool to tighten or loosen the bolt.

[0014] Further, the bearing assembly includes a first bearing, a second bearing and a sleeve;

[0015] The first bearing is sleeved on the first shaft body, and the second bearing is sleeved on the insertion portion;

[0016] Two ends of the shaft sleeve are respectively pressed against the first bearing and the second bearing.

[0017] Furthermore, the portion where the inserting part is inserted into the oil seal is a sealing fitting section, a first end of the sealing fitting section is provided with a shaft shoulder, and a second end of the sealing fitting section is provided with a chamfer;

[0018] The portion where the insertion portion is inserted into the second bearing is a first insertion section, and the diameter of the sealing fit is greater than the diameter of the first insertion section.

[0019] Further, the oil seal has a first sealing lip and a second sealing lip;

[0020] The first sealing lip is pressed against the sealing fitting section, and the second sealing lip is pressed against the shaft shoulder.

[0021] Furthermore, there are a plurality of first sealing lips, and the plurality of first sealing lips are arranged at intervals along the axial direction of the oil seal;

[0022] One of the first sealing lips is sleeved with a fastening spring, and the fastening spring is used to clamp the first sealing lip tightly onto the sealing matching section.

[0023] Further, a drainage hole is provided on the bottom wall of the shaft hole, and the drainage hole is arranged close to the opening; and / or,

[0024] The universal joint housing is provided with a second tool matching portion, and the second tool matching portion is used to match with an external tool to install and remove the universal joint housing.

[0025] Furthermore, the universal joint assembly also includes a second shaft and a dustproof component;

[0026] One end of the second shaft is inserted into the inner star wheel of the universal joint, and a limiting structure is provided between the second shaft and the inner star wheel, and the limiting structure is used to prevent the second shaft from moving along its own axial direction;

[0027] The dustproof component is sleeved on the second shaft body, and two ends of the dustproof component are respectively connected to the universal joint housing and the second shaft body.

[0028] Further, the dustproof assembly includes a dustproof cover and a sheath;

[0029] The first end of the dust cover is provided with a first flange, the first end of the sheath is provided with a second flange, and the first flange and the second flange are hooked and connected together;

[0030] The second end of the dust cover is tightly clamped on the universal joint housing, and the second end of the sleeve is tightly clamped on the second shaft through a first clamp.

[0031] Compared with the prior art, the utility model has the following advantages:

[0032] The universal joint assembly described in the utility model, when the universal joint and the counterpart are assembled, the insertion part of the universal joint housing is inserted into the shaft hole, and the insertion part is sleeved outside the first shaft body, and the connecting piece is connected to the insertion part and the first shaft body, so that the connecting piece can be prevented from being exposed; no flange is required on the first shaft body, which is conducive to reducing weight, and the universal joint and the counterpart are assembled together through only one connecting piece, with fewer parts, simple assembly process, and time and labor saving; by arranging an oil seal, the gap between the insertion part and the first shaft body can be sealed, effectively preventing dust from entering the bearing assembly, and better preventing oil leakage, thereby having a better protective effect on the bearing assembly, and facilitating the smooth and smooth rotation of the first shaft body and the universal joint housing.

[0033] In addition, the connecting piece adopts bolts, which can adopt existing standard parts and have low cost. Compared with the existing connection scheme of arranging multiple bolts, the number of parts can be reduced and the total weight of the universal joint assembly can be reduced. The anti-loosening structure provided can effectively prevent the bolt from loosening, has a good anti-loosening effect, and is conducive to ensuring the sealing effect of the oil seal. The anti-loosening structure includes a first retaining ring groove and a first retaining ring, which has a simple structure and is easy to install. The first retaining ring can adopt existing standard parts to reduce production costs. The first tool matching part is provided on the bolt, which can facilitate the use of external tools to tighten or loosen the bolt.

[0034] In addition, the bearing assembly includes a first bearing and a second bearing, which facilitates the smooth rotation of the first shaft and the universal joint housing. The provided sleeve, in addition to limiting the axial installation position of the first bearing and the second bearing, can also provide a positioning function for the installation of the second bearing, making it convenient and quick to find the installation position of the second bearing.

[0035] A shaft shoulder is provided at one end of the seal matching section of the insertion part to facilitate matching with the oil seal, and a chamfer is provided to facilitate smooth insertion of the insertion part into the oil seal, thereby preventing damage to the oil seal during the insertion process. A first sealing lip and a second sealing lip are provided at the same time, and the first sealing lip and the second sealing lip are respectively pressed against the seal matching section and the shaft shoulder, both of which have a good effect of preventing oil leakage. Providing a plurality of first sealing lips can reliably prevent oil leakage, and providing a tightening spring to tighten the sealing lip to the seal matching section can further effectively prevent oil leakage.

[0036] As for the drainage hole provided on the bottom wall of the shaft hole, it is arranged close to the opening to prevent water accumulation in this part from damaging the oil seal, which is beneficial to extending the service life of the oil seal. The second tool matching portion provided can cooperate with an external tool to facilitate the installation and removal of the universal joint housing.

[0037] At the same time, the second shaft body is inserted into the inner star wheel of the universal joint, and a limit structure is provided, so that the second shaft body can be stably and reliably installed. By providing a dustproof component, dust can be better prevented from entering the universal joint housing, which is conducive to the stable and reliable operation of the universal joint. The dustproof component includes a dust cover and a sleeve, and the dust cover and the sleeve can be made of different materials respectively. The dust cover and the sleeve are connected by hooking the first flange and the second flange, which is convenient to connect and has high connection reliability.

[0038] Another object of the present invention is to provide a vehicle, on which the universal joint assembly as described above is provided.

[0039] The vehicle described in the utility model, by applying the aforementioned universal joint assembly, is light in weight and can also prevent the connecting parts from being exposed. When the universal joint and the counterpart are assembled together only through the connecting parts, there are fewer parts, the assembly process is simple, and time and labor are saved. The set oil seal can better protect the bearing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0041] Figure 1 This is a structural schematic diagram of the universal joint assembly described in Embodiment 1 of the present utility model;

[0042] Figure 2 for Figure 1 Schematic diagram of the structure from another perspective;

[0043] Figure 3 It is a cross-sectional view of the universal joint assembly described in the first embodiment of the utility model;

[0044] Figure 4 for Figure 3 A magnified view of part A;

[0045] Figure 5 for Figure 3 A magnified view of part B;

[0046] Figure 6 for Figure 1 Schematic diagram of the structure from another perspective.

[0047] Description of reference numerals:

[0048] 1. Universal joint; 101. Universal joint housing; 102. Inner star wheel; 103. Cage; 104. Ball; 1011. Insertion portion; 10111. First retaining ring groove; 10112. Seal fitting section; 10113. Chamfer; 10114. Shoulder; 1012. Second tool fitting portion; 1013. Groove; 1014. First insertion section; 1015. Second insertion section; 1016. Exposed section;

[0049] 2. Opposite piece; 201. Opposite piece housing; 202. First shaft body; 2011. Shaft hole; 2012. Opening; 2013. Drain hole;

[0050] 3. Connector; 4. Bearing assembly; 401. First bearing; 402. Second bearing; 403. Bushing;

[0051] 5. Oil seal; 501. First sealing lip; 502. Second sealing lip; 503. Fastening spring;

[0052] 6. First retaining spring; 7. Second shaft body;

[0053] 8. Dustproof assembly; 801. Dustproof cover; 8011. First flange; 802. Sheath; 8021. Second flange;

[0054] 9. Second retaining spring; 10. First clamp; 11. Second clamp; 12. Bellows. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0056] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0058] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0059] Embodiment 1

[0060] The present embodiment relates to a universal joint assembly with fewer parts, a simple assembly process, time-saving and labor-saving, good sealing effect, and less prone to oil leakage.

[0061] Based on the above design concept, an exemplary structure of the universal joint assembly of this embodiment is as follows: Figures 1 to 3 As shown, the universal joint assembly mainly includes a universal joint 1, a pair of parts 2, a connecting part 3, a bearing assembly 4 and an oil seal 5.

[0062] The counterpart 2 may be, for example, an existing speed reducer, transfer case, etc. The counterpart 2 specifically includes a counterpart housing 201 and a first shaft 202. A gear connected to other rotating components of the counterpart 2 is provided on the left side of the first shaft 202. A shaft hole 2011 with an opening 2012 at one end is provided in the counterpart housing 201. The universal joint 1 includes a universal joint housing 101 having an inserting portion 1011. The inserting portion 1011 is inserted into the shaft hole 2011 through the opening 2012. The inserting portion 1011 is sleeved outside the first shaft 202. A torque transmission structure is provided between the inserting portion 1011 and the first shaft 202. The torque transmission structure is preferably a spline.

[0063] The aforementioned connecting member 3 connects the insert part 1011 and the first shaft body 202, and can limit the oil seal 5 between the opponent part housing 201 and the universal joint housing 101. The oil seal 5 can seal the gap between the opponent part housing 201 and the universal joint housing 101. The insert part 1011 and the first shaft body 202 connected together are rotatably arranged in the shaft hole 2011 through the bearing assembly 4.

[0064] As a preferred embodiment, the connecting member 3 includes a bolt connecting the first shaft body 202 and the inserting portion 1011, and the bolt is threadedly connected to the first shaft body 202. In the existing structure, during the assembly process of the universal joint 1 and the counterpart 2 such as the flange of the final reducer or the transfer case, the universal joint 1 and the counterpart 2 are connected by bolts or screws to compress the seal. Once the bolt is loosened, the connection part between the universal joint 1 and the counterpart 2 is prone to oil leakage.

[0065] Therefore, an anti-loosening structure is provided between the inserting portion 1011 and the bolt, and the anti-loosening structure is used to prevent the bolt from being loosened, which is beneficial to improving the stability and reliability of the connection between the first shaft body 202 and the inserting portion 1011, and can also prevent the bolt from being loosened after installation, thereby preventing the first shaft body 202 from loosening and causing abnormal noise, so as not to affect the driving feeling of the whole vehicle. In addition, the anti-loosening structure can make the universal joint housing 101 always press the oil seal 5, thereby ensuring the sealing effect.

[0066] In a preferred embodiment, the anti-loosening structure includes a first retaining spring groove 10111 provided in the insertion portion 1011, and a first retaining spring 6 embedded in the first retaining spring groove 10111, and the first retaining spring 6 is disposed on one side of the bolt to prevent the bolt from being loosened. Here, the anti-loosening structure includes the first retaining spring groove 10111 and the first retaining spring 6, which has a simple structure and is easy to install. The first retaining spring 6 can use existing standard parts to reduce production costs. The anti-loosening structure can effectively prevent the bolt from being loosened, has a good anti-loosening effect, and is conducive to ensuring the sealing effect of the oil seal 5.

[0067] It should be understood that in addition to the above anti-loosening structure, other anti-loosening structures can of course be used. For example, when the bolt and the first shaft 202 are screwed together, adding a fastener between the two can further improve the anti-loosening effect.

[0068] As a preferred embodiment, a first tool matching portion is provided at one end of the bolt away from the first shaft 202, and the first tool matching portion is used to match with an external tool to tighten or loosen the bolt. In this embodiment, the first tool matching portion can be, for example, a groove formed at the outer end of the bolt head, such as a hexagonal groove, and an external tool such as a wrench can be inserted into the groove to facilitate tightening or loosening the bolt.

[0069] It should be understood that the connecting member 3 is preferably a bolt, which can be an existing standard part, with low cost. Compared with the existing connection scheme of arranging multiple bolts, it can reduce the number of parts and reduce the total weight of the universal joint assembly. The first tool matching portion is provided on the bolt to facilitate the use of an external tool to tighten or loosen the bolt.

[0070] It should be noted that the connector 3 may be a nut in addition to a bolt. For example, the first shaft 202 may be extended to the right so that the nut is connected to the first shaft 202. However, this requires a larger layout space than a structure using bolts. For another example, the connector 3 may be a retaining spring, and the inner edge and outer edge of the retaining spring are respectively embedded in the grooves of the first shaft 202 and the inserting portion 1011.

[0071] As a preferred embodiment, the bearing assembly 4 includes a first bearing 401, a second bearing 402 and a sleeve 403. The first bearing 401 is sleeved on the first shaft body 202, the second bearing 402 is sleeved on the insertion part 1011, and the two ends of the sleeve 403 are respectively pressed against the first bearing 401 and the second bearing 402. As in this embodiment, the sleeve 403 is partially sleeved outside the first shaft body 202 and partially sleeved outside the insertion part 1011. When the insertion length of the insertion part 1011 is short, the sleeve 403 can also be partially sleeved outside the first shaft body 202.

[0072] In this structure, the bearing assembly 4 includes a first bearing 401 and a second bearing 402, which is beneficial to the smooth rotation of the first shaft body 202 and the universal joint housing 101. The sleeve 403 is provided, which can not only limit the axial installation position of the first bearing 401 and the second bearing 402, specifically refers to the axial installation position of the inner ring of the first bearing 401 and the inner ring of the second bearing 402, thereby preventing the bearing failure caused by axial displacement of the inner ring, but also provide a positioning function for the installation of the second bearing 402, so as to quickly and easily find the installation position of the second bearing 402.

[0073] As a preferred embodiment, Figure 4 As shown, the portion where the inserting portion 1011 is inserted into the oil seal 5 is the sealing matching section 10112, the first end of the sealing matching section 10112 is provided with a shaft shoulder 10114, and the second end of the sealing matching section 10112 is provided with a chamfer 10113. Here, the shaft shoulder 10114 is provided at one end of the sealing matching section 10112 of the inserting portion 1011 to facilitate matching with the oil seal 5, and the chamfer 10113 is provided to facilitate smooth insertion of the inserting portion 1011 into the oil seal 5, and to prevent scratching of the oil seal 5 during the insertion process.

[0074] In a preferred embodiment, still refer to Figure 3As shown, the portion where the insertion portion 1011 is inserted into the second bearing 402 is called the first insertion section 1014. The diameter of the sealing fitting section 10112 is larger than the diameter of the first insertion section 1014, which has a better effect of preventing dust from entering between the universal joint housing 101 and the opponent housing 201, thereby facilitating the smooth rotation of the first shaft body 202 and the universal joint housing 101.

[0075] Continue to refer to Figure 3 As shown, the insertion part 1011 also has a second insertion section 1015. Along the direction of the insertion part 1011 into the axial hole 2011, that is, the free left direction, the second insertion section 1015, the sealing fitting section 10112 and the first insertion section 1014 are arranged in sequence. The diameter of the second insertion section 1015 is larger than the diameter of the sealing fitting section 10112, and the second insertion section 1015 is clearance-fitted with the opponent housing 201. This can also better prevent dust from entering between the universal joint housing 101 and the opponent housing 201.

[0076] The universal joint housing 101 also has an exposed section 1016. In a preferred embodiment, the diameter of the exposed section 1016 is larger than the diameter of the second inserted section 1015, and the diameter of the exposed section 1016 is roughly consistent with the outer diameter of the portion of the opponent housing 201 where the axial hole 2011 is provided, and along the axial direction of the axial hole 2011, the gap between the exposed section 1016 and the opponent housing 201 is small, which further helps to improve the effect of preventing dust from entering between the inserted portion 1011 and the opponent housing 201.

[0077] As a preferred embodiment, the oil seal 5 has a first sealing lip 501 and a second sealing lip 502, wherein the first sealing lip 501 is pressed against the sealing matching section 10112, and the second sealing lip 502 is pressed against the shaft shoulder 10114. Here, the first sealing lip 501 and the second sealing lip 502 are provided at the same time, and the first sealing lip 501 and the second sealing lip 502 are pressed against the sealing matching section 10112 and the shaft shoulder 10114 respectively, both of which have a good effect of preventing oil leakage.

[0078] As a preferred embodiment, there are multiple first sealing lips 501, and the multiple first sealing lips 501 are arranged at intervals along the axial direction of the oil seal 5. A fastening spring 503 is sleeved on one of the first sealing lips 501. The fastening spring 503 is used to tighten the first sealing lip 501 on the sealing matching section 10112, which can provide a lasting radial force to the first sealing lip 501. Even if it runs for a long time, there is no need to worry about the sealing failure of the first sealing lip 501.

[0079] In this embodiment, the first sealing lip 501 near the bearing assembly 4 is a main sealing lip, and a fastening spring 503 is sleeved on the main sealing lip. In this embodiment, the oil seal 5 is provided with two first sealing lips 501 and one second sealing lip 502. The three sealing lips cooperate to effectively prevent foreign matter from entering the vicinity of the main sealing lips.

[0080] In the above structure, the first sealing lip 501 is provided in plurality, which can reliably prevent oil leakage, and the fastening spring 503 is provided to clamp the sealing lip on the sealing matching section 10112, which can further effectively prevent oil leakage.

[0081] In a preferred embodiment, a frame is embedded inside the oil seal 5 . The frame can be made of metal material to increase the rigidity of the oil seal 5 , prevent the oil seal 5 from deforming due to long-term operation, and provide a better sealing effect on the inside of the hand piece 2 .

[0082] As a preferred embodiment, a drainage hole 2013 is provided on the bottom wall of the shaft hole 2011, and the drainage hole 2013 is arranged close to the opening 2012. Figure 6 As shown, in this embodiment, the drainage hole 2013 is specifically a notch provided at the opening 2012. After being arranged on the vehicle, the notch is arranged downward. In this structure, the drainage hole 2013 provided on the bottom wall of the shaft hole 2011 is arranged close to the opening 2012, which can prevent the accumulated water in this part from damaging the oil seal 5, thereby extending the service life of the oil seal 5.

[0083] As a preferred embodiment, a second tool matching portion 1012 is provided on the universal joint housing 101, and the second tool matching portion 1012 is used to match with an external tool to install and remove the universal joint housing 101. In this embodiment, the second tool matching portion 1012 is specifically a groove body formed on the surface of the universal joint housing 101 and concave toward the center. The groove body is arranged circumferentially around the universal joint housing 101, so that an external tool can be embedded in the groove body, so that the external tool has a lever position, which facilitates the installation and removal of the universal joint housing 101, and can improve the convenience of installation and maintenance.

[0084] Here, the second tool matching portion 1012 can be matched with an external tool to facilitate the assembly and disassembly of the universal joint housing 101. It should be understood that the groove body here can surround the entire circumference of the universal joint housing 101, that is, the groove body is annular, and can also surround a portion of the circumference of the universal joint housing 101, that is, the groove body is arc-shaped.

[0085] As a preferred embodiment, the universal joint assembly further includes a second shaft body 7 and a dustproof component 8, wherein one end of the second shaft body 7 is inserted into the inner star wheel 102 of the universal joint, and a limiting structure is provided between the second shaft body 7 and the inner star wheel 102, and the limiting structure is used to prevent the second shaft body 7 from moving along its own axial direction. In this embodiment, the limiting structure specifically includes a second retaining spring groove and a second retaining spring 9,

[0086] Specifically, the inner star wheel 102 and the second shaft body 7 are both formed with a second retaining spring groove, the outer edge of the second retaining spring 9 is embedded in the second retaining spring groove of the inner star wheel 102, and the inner edge of the second retaining spring 9 is embedded in the second retaining spring groove of the second shaft body 7. In the above structure, the second shaft body 7 is inserted into the inner star wheel 102 of the universal joint, and a limiting structure is provided, so that the second shaft body 7 can be stably and reliably installed.

[0087] As a preferred embodiment, the dustproof component 8 is sleeved on the second shaft body 7, and the two ends of the dustproof component 8 are respectively connected to the universal joint housing 101 and the second shaft body 7. In this embodiment, by providing the dustproof component 8, dust can be better prevented from entering the universal joint housing 101, which is conducive to the stable and reliable operation of the universal joint 1.

[0088] In a preferred embodiment, Figure 5 As shown, the dustproof assembly 8 includes a dust cover 801 and a sleeve 802. The first end of the dust cover 801 is provided with a first flange 8011, and the folding angle of the first flange 8011 is 180°. The first end of the sleeve 802 is provided with a second flange 8021, and the folding angle of the second flange 8021 is 180°, so that the sleeve 802 has a groove body with a "U"-shaped cross-section. The first flange 8011 and the second flange 8021 are hooked together, and the second end of the dust cover 801 is tightly clamped on the universal joint housing 101, and the second end of the sleeve 802 is tightly clamped on the second shaft body 7 through the first clamp 10.

[0089] In the above structure, the first flange 8011 and the second flange 8021 are hooked and connected, and the cross section of the slot body is "U" shaped. After dust, dirt, etc. enter the slot body, these debris can be thrown out under the action of centrifugal force, thereby effectively preventing the debris from entering the universal joint housing 101. It should be noted that, preferably, a groove 1013 is provided on the outer surface of the universal joint housing 101, and the groove 1013 is arranged around the circumference of the universal joint housing 101. After the second end of the dust cover 801 is tightly clamped on the universal joint housing 101, it is partially embedded in the groove 1013 to improve the connection reliability between the dust cover 801 and the universal joint housing 101.

[0090] It is worth mentioning here that the dustproof component 8, in addition to including the dustproof cover 801 and the sleeve 802, can of course also adopt a single component, for example, a sleeve 802 made of rubber material only. When configured in this way, one end of the sleeve 802 is fastened to the universal joint housing 101 by a clamp, and the other end of the sleeve 802 is fastened to the second shaft 7 by a clamp.

[0091] As in the above structure, the dustproof component 8 includes a dustproof cover 801 and a sleeve 802. The dustproof cover 801 and the sleeve 802 can be made of different materials respectively. For example, the dustproof cover 801 can be made of metal material, and the sleeve 802 can be made of rubber material. The dustproof cover 801 and the sleeve 802 are hooked and connected by the first flange 8011 and the second flange 8021. The connection is convenient and the connection reliability is high.

[0092] Finally, it should be noted that a bellows 12 is sleeved outside the second shaft body 7 , one end of the bellows 12 is clamped on the second shaft body 7 by a second clamp 11 , and the other end is connected to an external component.

[0093] In this embodiment, when assembling the universal joint assembly, the counterpart housing 201 is placed on the tooling, and then the first bearing 401 and the first shaft body 202 are pressed onto the counterpart housing 201, and then the shaft sleeve 403 is installed in place, and then the oil seal 5 is installed in place, and then the universal joint housing 101 is pressed into place, and then the first shaft body 202 is connected and fastened with the insertion part 1011 by bolts. The first shaft body 202 and the insertion part 1011 are mainly connected by splines, and the bolts mainly play the role of preventing the first shaft body 202 and the universal joint housing 101 from axial movement.

[0094] Next, the components of the universal joint 1, such as the inner star wheel 102, the cage 103 and the ball 104, are installed in place, and then the dust cover 801 connected with the sleeve 802 is pressed onto the universal joint housing 101. Then the second shaft body 7 is inserted into the inner star wheel 102. The second shaft body 7 and the inner star wheel 102 are connected by splines, and because of the aforementioned limiting structure, a click sound is heard after insertion, indicating that it has been installed in place.

[0095] Then, the sheath 802 is clamped onto the second shaft body 7 by the first clamp 10 to achieve the universal joint sealing. Finally, the bellows 12 is installed onto the second shaft body 7 and tightened by the second clamp 11 to complete the assembly of the universal joint assembly.

[0096] The universal joint assembly of this embodiment can reduce the installation process and installation man-hours when the universal joint 1 is assembled with the counterpart, and is relatively easy to install using tools. The insertion portion 1011 of the universal joint housing 101 is inserted into the shaft hole 2011, and the insertion portion 1011 is sleeved outside the first shaft body 202, and the connecting member 3 connects the insertion portion 1011 and the first shaft body 202, which can prevent the connecting member 3 from being exposed, thereby enhancing the refinement of the vehicle. No flange is required on the first shaft body 202, which is beneficial to reducing weight and thus contributing to lightweighting of the entire vehicle.

[0097] The universal joint and the counterpart are assembled together through only one connecting piece 3, with fewer parts and components, a simple assembly process, and time and labor saving. By setting an oil seal 5, the gap between the insert portion 1011 and the first shaft body 202 can be sealed, effectively preventing dust from entering the bearing assembly 4 and better preventing oil leakage, thereby providing better protection for the bearing assembly 4 and facilitating the smooth and stable rotation of the first shaft body 202 and the universal joint housing 101.

[0098] Embodiment 2

[0099] This embodiment relates to a vehicle, on which is provided a universal joint assembly as described in the first embodiment.

[0100] The vehicle of this embodiment, by applying the universal joint assembly of the first embodiment, can prevent the connecting part 3 from being exposed, thereby enhancing the refinement of the vehicle. When the universal joint 1 and the counterpart 2 are assembled together only by the connecting part 3, there are fewer parts, the assembly process is simple, and time and labor are saved. The provided oil seal 5 can provide better protection for the bearing assembly 4.

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A universal joint assembly, characterized in that: It comprises a universal joint (1), a pair of parts (2), a connecting part (3), a bearing assembly (4) and an oil seal (5); The opponent (2) comprises an opponent housing (201) and a first shaft (202); an axial hole (2011) with an opening (2012) at one end is provided in the opponent housing (201); The universal joint (1) comprises a universal joint housing (101) having an inserting portion (1011), wherein the inserting portion (1011) is inserted into the shaft hole (2011) through the opening (2012), the inserting portion (1011) is sleeved outside the first shaft body (202), and a torque transmission structure is provided between the inserting portion (1011) and the first shaft body (202); The connecting member (3) connects the insert part (1011) and the first shaft body (202), and is capable of restricting the oil seal (5) between the counterpart housing (201) and the universal joint housing (101). The insert part (1011) and the first shaft body (202) connected together are rotatably arranged in the shaft hole (2011) via the bearing assembly (4).

2. The universal joint assembly according to claim 1, characterized in that: The connecting member (3) comprises a bolt connecting the first shaft (202) and the inserting portion (1011), and the bolt is threadedly connected to the first shaft (202); An anti-loosening structure is provided between the insertion portion (1011) and the bolt, the anti-loosening structure comprising a first retaining spring groove (10111) provided on the insertion portion (1011), and a first retaining spring (6) embedded in the first retaining spring groove (10111), the first retaining spring (6) being blocked on one side of the bolt to prevent the bolt from being loosened; and / or, A first tool fitting portion is provided at one end of the bolt away from the first shaft (202), and the first tool fitting portion is used to cooperate with an external tool to tighten or loosen the bolt.

3. The universal joint assembly according to claim 1, characterized in that: The bearing assembly (4) comprises a first bearing (401), a second bearing (402) and a shaft sleeve (403); The first bearing (401) is sleeved on the first shaft (202), and the second bearing (402) is sleeved on the insertion portion (1011); Two ends of the shaft sleeve (403) are respectively pressed against the first bearing (401) and the second bearing (402).

4. The universal joint assembly according to claim 3, characterized in that: The portion where the insertion portion (1011) is inserted into the oil seal (5) is a sealing fitting section (10112), a first end of the sealing fitting section (10112) is provided with a shaft shoulder (10114), and a second end of the sealing fitting section (10112) is provided with a chamfer (10113); The portion where the insertion portion (1011) is inserted into the second bearing (402) is the first insertion section (1014), and the diameter of the sealing fitting section (10112) is greater than the diameter of the first insertion section (1014).

5. The universal joint assembly according to claim 4, characterized in that: The oil seal (5) has a first sealing lip (501) and a second sealing lip (502); The first sealing lip (501) is pressed against the sealing fitting section (10112), and the second sealing lip (502) is pressed against the shaft shoulder (10114).

6. The universal joint assembly according to claim 5, characterized in that: There are a plurality of first sealing lips (501), and the plurality of first sealing lips (501) are arranged at intervals along the axial direction of the oil seal (5); One of the first sealing lips (501) is sleeved with a fastening spring (503), and the fastening spring (503) is used to tighten the first sealing lip (501) onto the sealing matching section (10112).

7. The universal joint assembly according to claim 1, characterized in that: A drainage hole (2013) is provided on the bottom wall of the shaft hole (2011), and the drainage hole (2013) is arranged close to the opening (2012); and / or, The universal joint housing (101) is provided with a second tool matching portion (1012), and the second tool matching portion (1012) is used to match with an external tool to assemble and disassemble the universal joint housing (101).

8. The universal joint assembly according to any one of claims 1 to 7, characterized in that: The universal joint assembly also includes a second shaft (7) and a dustproof component (8); One end of the second shaft (7) is inserted into the inner star wheel (102) of the universal joint, and a limiting structure is provided between the second shaft (7) and the inner star wheel (102), wherein the limiting structure is used to prevent the second shaft (7) from moving along its own axial direction; The dustproof component (8) is sleeved on the second shaft (7), and two ends of the dustproof component (8) are respectively connected to the universal joint housing (101) and the second shaft (7).

9. The universal joint assembly according to claim 8, characterized in that: The dustproof component (8) comprises a dustproof cover (801) and a protective sleeve (802); The first end of the dust cover (801) is provided with a first flange (8011), and the first end of the sheath (802) is provided with a second flange (8021), and the first flange (8011) and the second flange (8021) are hooked and connected together; The second end of the dust cover (801) is tightly clamped on the universal joint housing (101), and the second end of the sleeve (802) is tightly clamped on the second shaft (7) through a first clamp (10).

10. A vehicle, characterized in that: The vehicle is provided with a universal joint assembly according to any one of claims 1 to 9.

Images