CN216009274U - Universal joint capable of exhausting gas and having long service life - Google Patents
Universal joint capable of exhausting gas and having long service life Download PDFInfo
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- CN216009274U CN216009274U CN202121629492.2U CN202121629492U CN216009274U CN 216009274 U CN216009274 U CN 216009274U CN 202121629492 U CN202121629492 U CN 202121629492U CN 216009274 U CN216009274 U CN 216009274U
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- outer ring
- bearing
- dust cover
- bearing outer
- oil seal
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Abstract
The utility model discloses a universal joint capable of exhausting air and having a long service life, which comprises a cross shaft, wherein a needle roller bearing is arranged on a journal of the cross shaft, an oil seal is arranged on the inner side of the opening part of a bearing outer ring of the needle roller bearing, a dust cover is arranged on the opening part of the bearing outer ring of the needle roller bearing, a needle roller check ring is arranged between a needle roller and the oil seal, a gasket is arranged between one side of the needle roller bearing, which is far away from the dust cover, and the inner wall of the bearing outer ring, one side of the opening part of the bearing outer ring, which is close to the oil seal, is provided with a bearing outer ring inner groove, and the outer side of the opening part of the bearing outer ring is provided with a bearing outer ring outer groove; and the outer end part of the dust cover is provided with a dust cover outer lip which is embedded into the outer groove of the bearing outer ring to fix the dust cover. The utility model effectively solves the problem of difficult air exhaust in the universal joint, and the exhaust micro-channel is formed by combining the aspects of the sealing element structure arrangement, the matching design of the inner circle of the bearing outer ring, the matching of the inner groove of the bearing outer ring and the arrangement of the dust cover cavity, so that redundant air in the universal joint can be exhausted through the micro-channel.
Description
Technical Field
The utility model relates to the field of universal joints, in particular to a universal joint capable of exhausting air and having a long service life.
Background
The universal joint is an important joint part on an automobile, and the universal joint is combined with a transmission shaft to realize shaft power output in different directions. The common universal joint generally comprises a cross shaft and a needle bearing sleeved on a journal of the cross shaft, wherein the outer end of the needle bearing is closed, the inner end of the needle bearing is opened, and a sealing ring is arranged at the opening. The universal joint needs to transmit power in the working process, the universal joint is complex in stressed movement due to the influence of angular velocity in the power transmission process, radial acting force and axial force are applied, the maximum acting force of the universal joint generates static torsional force for the universal joint, an upper shaft neck of the universal joint is generally contacted with an inner circle of a bearing in the use process, the end face of the universal joint is contacted with the bottom surface of the bearing, and the load received in the movement process is uneven, so that the universal joint is seriously abraded and loses efficacy, and the service life is short.
Prior art patent publication No. CN110043570A discloses a long-life universal joint capable of exhausting air and without oil leakage, which is mainly characterized in that an exhaust groove communicating the inside of a bearing with the outside is arranged in an oil seal for exhausting the air generated in the bearing to the outside. However, the oil seal is internally provided with the bent exhaust groove, so that the manufacturing difficulty is high.
Prior art publication No. CN104696380A discloses a long-life cross axle universal joint, cross axle body and armshaft formula structure as an organic whole, the armshaft includes axle journal and circular bead, the axle journal passes through circular bead and this body coupling of cross axle, the lateral surface of axle journal is the conical surface, the diameter of axle journal root is greater than the diameter of axle journal outer end, needle bearing's open end inboard is equipped with the sealing washer, the inboard and circular bead surface laminating contact of sealing washer, needle bearing's open end tip is equipped with the dust ring, it is good to have sealing performance, the influence of bearing inner ring inner wall contact of bearing needle and bearing inner race in the bearing has not been considered.
The prior art publication No. CN111442033A relates to a universal joint cross axle assembly for reducing the stress concentration of a universal joint, a shaft sleeve middle part micro-arc groove which is integrated with a shaft sleeve roller way and is concave inwards is arranged on a shaft sleeve roller way, and a shaft sleeve near root part micro-arc groove is arranged between the shaft sleeve middle part micro-arc groove and a compression spring washer. The device has the characteristics of compact structure, good operation stability and long service cycle. In order to solve the problem of stress concentration. The occurrence of failures such as indentation, sintering, fatigue spalling, breakage, defect and the like of the roller pin is avoided, and the service life of the cross shaft assembly is prolonged.
In general, the existing long-life gimbal structure mainly has the following defects:
1. after the universal joint is assembled, certain air exists in the universal joint and is difficult to discharge, or after the universal joint is improved, a bent exhaust groove is formed in the oil seal, but the manufacturing difficulty is high;
2. the outer opening part of the bearing outer ring is a chamfer, and sharp edges exist, so that the rubber part of the dust cover is quickly worn when the universal joint is used, the failure of a sealing system is early, and the service life of the universal joint is shortened;
3. the contact surface of the inner circle of the bearing outer ring and the roller pin has sharp edges, so that stress concentration is easy to occur, and early abrasion and looseness are caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the universal joint capable of exhausting air and having a long service life, which is easy to manufacture and convenient to assemble, solves the problem of difficult air exhaust in the universal joint, and prolongs the service life of the universal joint.
The purpose of the utility model is achieved by the following technical scheme: the universal joint capable of exhausting air and having a long service life comprises a cross shaft, wherein a needle roller bearing is arranged on a shaft neck of the cross shaft, an oil seal is arranged on the inner side of an opening part of a bearing outer ring of the needle roller bearing, a dustproof cover is arranged on the opening part of the bearing outer ring of the needle roller bearing, a needle roller check ring is arranged between a needle roller and the oil seal, a gasket is arranged between one side of the needle roller bearing, which is far away from the dustproof cover, and the inner wall of the bearing outer ring, an inner bearing outer ring groove is arranged on one side of the opening part of the bearing outer ring, which is close to the oil seal, and an outer bearing outer ring groove is arranged on the outer side of the opening part of the bearing outer ring; the oil seal is in interference fit with the journal of the cross shaft, one side of the oil seal close to the bearing outer ring is provided with an oil seal framework, the opening part of the oil seal framework is outwards turned to form a framework outwards turning part, and the framework outwards turning part is clamped into an inner groove of the bearing outer ring to position and fix the oil seal; the outer end of the dust cover is provided with a dust cover outer lip, the dust cover outer lip is embedded into the outer groove of the bearing outer ring to fix the dust cover, the inner end of the dust cover is provided with a dust cover inner lip, the dust cover inner lip and the outward turning part of the framework are in interference fit to form sealing, and a dust cover cavity is arranged at the contact position of the inner wall of the dust cover and the opening of the bearing outer ring.
According to the preferable technical scheme, the outer circle of the oil seal framework is in clearance fit with the inner circle surface of the bearing outer ring, and an exhaust passage is formed between the inner groove of the bearing outer ring and the dust cover cavity.
As a preferred technical scheme, the inner circular surface of the bearing outer ring is provided with convexity, the convexity a is 10 'to 60', and the convexity length L is 0.2 to 2 mm.
As the preferred technical scheme, the oil seal framework is provided with the bulges which are in interference fit with the inner circle surface of the bearing outer ring, and the quantity of the bulges on the oil seal framework is determined according to the size of a product.
According to a preferable technical scheme, fillets are arranged on the inner side and the outer side of the opening of the bearing outer ring.
Preferably, the needle roller bearing is a round needle roller.
As a preferable technical scheme, the oil seal adopts a pre-tightening oil seal structure.
The utility model has the beneficial effects that:
1. the problem of difficult air exhaust in the universal joint is solved, and the air exhaust micro-channel is formed by combining the aspects of sealing element structure arrangement, matching design of an inner circle of a bearing outer ring, matching of an inner groove of the bearing outer ring and arrangement of a dust cover cavity, so that redundant air in the universal joint can be exhausted through the micro-channel, meanwhile, external foreign matters cannot enter the universal joint through the air exhaust micro-channel, and a better environment is provided for internal lubrication of the universal joint;
2. when the dust cover is used, the dust cover is a weak link in a universal joint assembly and is easy to fail in early stage, and the chamfer angle of the opening part of the bearing outer ring is improved into an R fillet, so that the matched wear of the dust cover can be greatly improved, and the service life is prolonged;
3. the design of the convexity at the edge of the inner circle surface of the bearing avoids the problem that the contact of the inner circle of the bearing and the roller pin easily causes stress concentration due to sharp edges.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of fig. 1.
Fig. 3 is a schematic structural diagram of a bearing outer ring.
Fig. 4 is a partially enlarged view of the area a in fig. 3.
Fig. 5 is a schematic structural view of the oil seal.
Fig. 6 is a schematic structural view of the dust cover.
Description of reference numerals: the dustproof cover comprises a cross shaft 1, a needle bearing 2, a bearing outer ring 3, a bearing outer ring inner groove 3-1, a bearing outer ring outer groove 3-2, a bearing outer ring inner circular surface 3-3, convexity 3-4, a fillet 3-5, an oil seal 4, an oil seal framework 4-1, a framework outward turning part 4-2, a bulge 4-3, a needle roller check ring 5, a gasket 6, a dustproof cover 7, a dustproof cover outer lip 7-1, a dustproof cover inner lip 7-2 and a dustproof cover cavity 7-3.
Detailed Description
The utility model will be described in detail below with reference to the following drawings:
example (b): as shown in the attached figure 1, the universal joint capable of exhausting air and having a long service life comprises a cross shaft 1, wherein a needle bearing 2 is arranged on a journal of the cross shaft 1, an oil seal 4 is arranged on the inner side of a mouth part of a bearing outer ring 3 of the needle bearing 2, a dust cover 7 is arranged on the mouth part of the bearing outer ring 3 of the needle bearing 2, a needle roller retainer ring 5 is arranged between a needle roller and the oil seal 4, a gasket 6 is arranged between one side of the needle bearing 2, which is far away from the dust cover 7, and the inner wall of the bearing outer ring 3, a bearing outer ring inner groove 3-1 is formed on one side of the mouth part of the bearing outer ring 3, which is close to the oil seal 4, and a bearing outer ring outer groove 3-2 is formed on the outer side of the mouth part of the bearing outer ring 3; the oil seal 4 is in interference fit with a shaft neck of the cross shaft 1, an oil seal framework 4-1 is arranged on one side, close to the bearing outer ring 3, of the oil seal 4, the opening of the oil seal framework 4-1 is outwards turned to form a framework outwards turned part 4-2, and the framework outwards turned part 4-2 is clamped into the bearing outer ring inner groove 3-1 to position and fix the oil seal 4. Referring to the attached figure 6, the outer end of the dust cover 7 is provided with a dust cover outer lip 7-1, the dust cover outer lip 7-1 is embedded into the bearing outer ring outer groove 3-2 to fix the dust cover 7, the inner end of the dust cover 7 is provided with a dust cover inner lip 7-2, the dust cover inner lip 7-2 is pressed against the framework outward turning part 4-2, the dust cover outer lip and the framework outward turning part are in interference fit to form a seal, and the inner wall of the dust cover 7 is in clearance fit with the opening part of the bearing outer ring 3 to form a dust cover cavity 7-3.
As shown in figure 2, the outer ring of the oil seal framework 4-1 is in clearance fit with the inner circular surface 3-3 of the bearing outer ring, and an exhaust micro-channel is formed between the inner groove 3-1 of the bearing outer ring and the dust cover cavity 7-3. Can make the inside unnecessary gas of universal joint pass through the microchannel and discharge, outside foreign matter can not get into inside the universal joint through exhaust microchannel simultaneously, provides better environment for the inside lubrication of universal joint.
As shown in FIG. 4, the inner circular surface 3-3 of the bearing outer ring is provided with a convexity 3-4, the convexity a is 10 'to 60', and the convexity length L is 0.2 to 2 mm. The problem that stress concentration is easily caused by sharp edges when the inner circle of the bearing is in contact with the roller pin is avoided.
As shown in figure 5, the oil seal framework 4-1 is provided with the bulges 4-3, the bulges 4-3 are in interference fit with the inner circular surface 3-3 of the bearing outer ring, and the number of the bulges is set according to the actual requirement of a product. Preferably, the oil seal 4 can be used in combination with a pre-tightening oil seal in the prior art to achieve a better sealing effect.
As shown in FIG. 3, fillets 3-5 are arranged on the inner side and the outer side of the opening of the bearing outer ring 3, so that abrasion of the dust cover can be reduced, and the service life of the dust cover is prolonged.
Preferably, the needle roller bearing 2 adopts a round needle roller, so that the contact stress between the sharp corner of the inner circle of the bearing outer ring and the needle roller can be reduced, and the service life is prolonged. The oil seal 4 adopts a pre-tightening oil seal structure to obtain better sealing effect.
The utility model effectively solves the problem of difficult air exhaust in the universal joint, and the exhaust micro-channel is formed by combining the aspects of the sealing element structure arrangement, the matching design of the inner circle of the bearing outer ring, the matching of the inner groove of the bearing outer ring and the arrangement of the dust cover cavity, so that redundant air in the universal joint can be exhausted through the micro-channel, and meanwhile, external foreign matters can not enter the universal joint through the exhaust micro-channel, thereby providing a better environment for the internal lubrication of the universal joint; when the dust cover is used, the dust cover is a weak link in a universal joint assembly and is easy to fail in early stage, and the chamfer angle of the opening part of the bearing outer ring is improved into an R fillet, so that the matched wear of the dust cover can be greatly improved, and the service life is prolonged; the design of the convexity at the edge of the inner circle surface of the bearing avoids the problem that the contact of the inner circle of the bearing and the roller pin easily causes stress concentration due to sharp edges.
It should be understood that equivalent alterations and modifications of the technical solution and the inventive concept of the present invention by those skilled in the art should fall within the scope of the appended claims.
Claims (6)
1. The utility model provides a can exhaust long-life universal joint, includes cross (1), be provided with bearing (2) on the axle journal of cross (1), oil blanket (4) are installed to bearing inner race (3) oral area inboard of this bearing (2), and there is dust cover (7) bearing inner race (3) oral area of bearing (2), and needle ring (5) are located between kingpin and oil blanket (4), set up gasket (6) between one side that dust cover (7) were kept away from in bearing (2) and the inner wall of bearing inner race (3), its characterized in that: an inner bearing outer ring groove (3-1) is formed in one side, close to the oil seal (4), of the opening of the bearing outer ring (3), and an outer bearing outer ring groove (3-2) is formed in the outer side of the opening of the bearing outer ring (3); the oil seal (4) is in interference fit with a shaft neck of the cross shaft (1), an oil seal framework (4-1) is arranged on one side, close to the bearing outer ring (3), of the oil seal (4), the opening of the oil seal framework (4-1) is turned outwards to form a framework outward turning part (4-2), and the framework outward turning part (4-2) is clamped into an inner groove (3-1) of the bearing outer ring to position and fix the oil seal (4); the outer end of the dust cover (7) is provided with a dust cover outer lip (7-1), the dust cover outer lip (7-1) is embedded into the bearing outer ring outer groove (3-2) to fix the dust cover (7), the inner end of the dust cover (7) is provided with a dust cover inner lip (7-2), the dust cover inner lip (7-2) and the framework outward turning part (4-2) are in interference fit to form sealing, and a dust cover cavity (7-3) is arranged at the contact position of the inner wall of the dust cover (7) and the opening of the bearing outer ring (3).
2. The ventable long life gimbal of claim 1, wherein: the outer circle of the oil seal framework (4-1) is in clearance fit with the inner circle surface (3-3) of the bearing outer ring, and an exhaust passage is formed between the inner groove (3-1) of the bearing outer ring and the dust cover cavity (7-3).
3. The ventable long life gimbal of claim 2, wherein: and the inner circular surface (3-3) of the bearing outer ring is provided with a convexity (3-4), the convexity a is 10 'to 60', and the convexity length L is 0.2 to 2 mm.
4. The ventable long life gimbal of claim 2, wherein: the oil seal framework (4-1) is provided with bulges (4-3), the bulges (4-3) are in interference fit with the inner circular surface (3-3) of the bearing outer ring, and the quantity of the bulges on the oil seal framework is determined according to the size of a product.
5. The ventable long life gimbal of claim 1, wherein: and fillets (3-5) are arranged on the inner side and the outer side of the opening part of the bearing outer ring (3).
6. The ventable long life gimbal of claim 1, wherein: the oil seal (4) adopts a pre-tightening oil seal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629492.2U CN216009274U (en) | 2021-07-16 | 2021-07-16 | Universal joint capable of exhausting gas and having long service life |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629492.2U CN216009274U (en) | 2021-07-16 | 2021-07-16 | Universal joint capable of exhausting gas and having long service life |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216009274U true CN216009274U (en) | 2022-03-11 |
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ID=80529146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121629492.2U Active CN216009274U (en) | 2021-07-16 | 2021-07-16 | Universal joint capable of exhausting gas and having long service life |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216009274U (en) |
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2021
- 2021-07-16 CN CN202121629492.2U patent/CN216009274U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 311215 Wanxiang Road, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Wanxiang Qianchao Co.,Ltd. Patentee after: WANXIANG GROUP Co.,Ltd. Address before: No.1 Wanxiang Road, Xiaoshan Economic and Technological Development Zone, Hangzhou City, Zhejiang Province Patentee before: WANXIANG QIANCHAO Co.,Ltd. Patentee before: WANXIANG GROUP Co.,Ltd. |