CN213655523U

CN213655523U - Universal joint with exhaust sealing structure

Info

Publication number: CN213655523U
Application number: CN202020614126.9U
Authority: CN
Inventors: 董小忠; 牛杰
Original assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Current assignee: Wanxiang Qianchao Co Ltd; Wanxiang Group Corp
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-07-09
Anticipated expiration: 2030-04-22

Abstract

The utility model discloses a seal structure universal joint can exhaust, mainly include cross, oil blanket, microgroove A, microgroove B etc. on the axle journal of cross the suit axle sleeve and install the kingpin between the two, the axle sleeve bottom is equipped with the gasket, install the oil blanket between axle sleeve oral area and the cross, the oil blanket passes through oil blanket skeleton interference and installs on the axle sleeve internal diameter, it realizes sealedly to be equipped with rubber lip interference contact cross on the oil blanket skeleton, a plurality of microgrooves A have been seted up on the internal diameter of axle sleeve, a plurality of microgrooves B are seted up to the oral area terminal surface position of axle sleeve. The utility model discloses a to the universal joint seal structure design optimization, set up the microgroove in axle sleeve and oil blanket cooperation department, constitute the aperture after the assembly, in time the pressure release when making the inside heating gas pressure intensity of bearing rise, guarantee that the inside and outside pressure of bearing equals, avoid strutting the oil blanket lip, cause the grease to leak; the sealing device can ensure the sealing performance of the bearing and timely remove gas and heat inside the bearing, improve the working environment of the bearing and prolong the service life of the bearing.

Description

Universal joint with exhaust sealing structure

Technical Field

The utility model relates to a field of universal joint, concretely relates to but exhaust seal structure universal joint.

Background

The universal joint comprises sealed parts such as a cross shaft, an oil seal, a shaft sleeve and the like, and functional parts such as a needle roller, a gasket and the like. The universal joint assembly has the advantages that lubrication is provided among the cross shaft, the roller pins and the shaft sleeve by virtue of lubricating grease, friction is reduced, the service life of the universal joint assembly is guaranteed, the sealing structure has the function of guaranteeing that grease inside the bearing does not leak and foreign matters such as external muddy water do not invade, and the quality of the sealing performance directly determines the service life of the universal joint. In the prior art, an oil seal framework is pressed into a shaft sleeve in an interference fit mode, and a rubber lip is in interference fit with a cross shaft, so that the inside and the outside are completely isolated to realize sealing. In the universal joint use, because there is contact friction between kingpin and cross axle journal and the axle sleeve, the inside temperature of bearing can rise, and because the change in bearing working process swing space, lead to the inside heat generation of bearing and pressure to rise, the inside pressure that produces of bearing forces seal lip and contact surface separation, the inside and outside complete isolation of bearing, deviate from with the design original intention, lead to the grease to spill, in the long term, after the grease volume leaks excessively, the bearing can not obtain sufficient lubrication, finally influence the universal joint life-span.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a novel seal structure universal joint can exhaust.

The purpose of the utility model is accomplished through following technical scheme: the universal joint with the exhaust sealing structure mainly comprises a cross shaft, an oil seal, a shaft sleeve, a roller pin, a gasket, an oil seal framework, a rubber lip, a small groove A and a small groove B, wherein the shaft sleeve is sleeved on a shaft neck of the cross shaft, the roller pin is arranged between the shaft sleeve and the shaft neck, the gasket is arranged at the bottom of the shaft sleeve, an oil seal is arranged between the opening part of the shaft sleeve and the cross shaft, the oil seal is arranged on the inner diameter of the shaft sleeve through the interference of the oil seal framework, the rubber lip is arranged on the oil seal framework and in interference contact with the cross shaft to realize sealing, the small grooves A are formed in the.

The small grooves A and the small grooves B are arranged along the circumferential direction.

The positions of the small grooves A and the positions of the small grooves B in the circumferential direction are staggered with each other to form a labyrinth structure.

The length of the small groove A is slightly longer than the length of the matching section of the oil seal framework, and the small groove A does not contact with the working area of the roller pin.

The utility model has the advantages that: the utility model discloses a to the universal joint seal structure design optimization, set up the microgroove in axle sleeve and oil blanket cooperation department, constitute the aperture after the assembly, in time the pressure release when making the inside heating gas pressure intensity of bearing rise, guarantee that the inside and outside pressure of bearing equals, avoid strutting the oil blanket lip, cause the grease to leak; the positions of the small grooves in the inner diameter of the shaft sleeve and the positions of the small grooves on the end face are staggered to form a labyrinth structure, different flow phases and viscous tension differences of gas and liquid are ingeniously utilized, and therefore not only can grease leakage and foreign matters such as external muddy water be effectively prevented from entering, but also gas discharge can be guaranteed; the sealing device can ensure the sealing performance of the bearing and timely remove gas and heat inside the bearing, improve the working environment of the bearing and prolong the service life of the bearing.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a partially enlarged view of a portion B in fig. 3.

Fig. 5 is a schematic view of the shaft sleeve structure of the present invention.

Description of reference numerals: the universal joint pin comprises a universal joint pin 1, an oil seal 2, a shaft sleeve 3, a roller pin 4, a gasket 5, an oil seal framework 6, a rubber lip 7, a small groove A8 and a small groove B9.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawing, the universal joint with the exhaust sealing structure mainly comprises a cross shaft 1, an oil seal 2, a shaft sleeve 3, a roller pin 4, a gasket 5, an oil seal framework 6, a rubber lip 7, a small groove A8 and a small groove B9, wherein the shaft sleeve 3 is sleeved on a shaft neck of the cross shaft 1, the roller pin 4 is installed between the shaft sleeve and the cross shaft 1, the gasket 5 is arranged at the bottom of the shaft sleeve 3, the oil seal 2 is installed between a mouth part of the shaft sleeve 3 and the cross shaft 1, the oil seal 2 is installed on the inner diameter of the shaft sleeve 3 in an interference mode through the oil seal framework 6, the rubber lip 7 is arranged on the oil seal framework 6 and contacts with the cross shaft 1 to realize sealing, a plurality of small grooves A8 are formed in the inner diameter of the shaft sleeve 3, a plurality of small grooves B. When the gas pressure of the inner roller pin cavity is increased, redundant gas can be discharged in time to realize pressure relief, and the inner pressure and the outer pressure are ensured to be equal. The small groove A8 and the small groove B9 are circumferentially offset from each other to form a labyrinth structure. The small grooves A8 and B9 are extremely small in size and form a labyrinth, so that grease does not leak from the small grooves A8 and B9 due to the surface tension of the liquid, external muddy water does not enter, air can be discharged from the small grooves A8 and B9, and the internal pressure and the external pressure are kept equal. The length of the small groove A8 is slightly longer than the length of the matching section of the oil seal framework 6, and the small groove A8 does not contact the working area of the roller pin 4 and has no influence on the normal bearing of the roller pin 4.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. The utility model provides a but exhaust seal structure universal joint which characterized in that: the sealing device mainly comprises a cross shaft (1), an oil seal (2), a shaft sleeve (3), a roller pin (4), a gasket (5), an oil seal framework (6), a rubber lip (7), a small groove A (8) and a small groove B (9), wherein the shaft neck of the cross shaft (1) is sleeved with the shaft sleeve (3) and the roller pin (4) is installed between the shaft sleeve and the cross shaft (1), the gasket (5) is arranged at the bottom of the shaft sleeve (3), the oil seal (2) is installed between the opening of the shaft sleeve (3) and the cross shaft (1), the oil seal (2) is installed on the inner diameter of the shaft sleeve (3) in an interference mode through the oil seal framework (6), the rubber lip (7) is arranged on the oil seal framework (6) and is in interference contact with the cross shaft (1) to realize sealing, the small grooves A (8) are formed in.

2. A ventable seal structure gimbal according to claim 1, wherein: the small grooves A (8) and the small grooves B (9) are arranged along the circumferential direction.

3. A ventable seal structure gimbal according to claim 1 or 2, wherein: the positions of the small grooves A (8) and the positions of the small grooves B (9) are staggered in the circumferential direction.

4. A ventable seal structure gimbal according to claim 3, wherein: the length of the small groove A (8) is slightly longer than the length of a matching section of the oil seal framework (6), and the small groove A does not contact with the working area of the rolling needle (4).