CN209800530U - Thrust tapered roller bearing special for steering knuckle - Google Patents

Abstract

The utility model provides a special thrust tapered roller bearing of knuckle, includes race, tapered roller, shell, and the bottom of race is equipped with annular seat circle recess, and the shell is cyclic annular, the bottom embedding of shell in the seat circle recess, the shell is integrative with the pressure equipment of seat circle to the shell lateral wall leaves the clearance with the lateral wall of race, so that the race is nimble to be rotated and prevent that the large granule from getting into inside the bearing, and the inboard of race and race is equipped with annular raceway, and the inclination of the bottom of raceway is the same with the inclination of tapered roller's side, and the lateral wall of raceway is the flange, and tapered roller fills in the raceway of race and race. The double-roller path of the thrust tapered roller bearing special for the steering knuckle can ensure that the bearing can be used for a long time under severe working environment; the triple protection of shell, outer oil seal circle, interior oil seal circle can block that rubble, sewage, dust etc. get into the bearing, can effectively reduce spilling over of bearing lubricating grease simultaneously.

Description

Thrust tapered roller bearing special for steering knuckle

Technical Field

The utility model relates to an automobile bearing field especially relates to a special thrust tapered roller bearing of knuckle.

Background

The bearings used in front axle knuckles of heavy truck vehicles are typically exposed to the surrounding environment. In particular, mine vehicles, road debris, sewage and environmental dust can have a great influence on the use of bearings. In the prior art, a bearing of a front axle steering knuckle comprises a thrust ball bearing, a sliding sheet thrust bearing, a single-raceway thrust tapered roller bearing and the like. The thrust ball bearing has poor bearing capacity and high requirement on environmental quality, and the requirement cannot be met frequently; the sliding sheet thrust bearing has large friction resistance, is particularly obvious after being used for a period of time, and has bad influence on the steering performance of the automobile; the bearing capacity of the single-raceway tapered roller thrust bearing is improved to a certain extent, but early fatigue and fracture failure of the raceway flange often occur in the use process.

Disclosure of Invention

The utility model discloses not enough to prior art appears, provide a longer knuckle special thrust tapered roller bearing of life.

A thrust tapered roller bearing special for a steering knuckle comprises a shaft ring, a seat ring, a tapered roller, a shell, an inner oil seal ring and an outer oil seal ring, wherein an annular seat ring groove is formed in the bottom of the seat ring, the shell is annular, the bottom of the shell is embedded into the seat ring groove, the shell and the seat ring are pressed into a whole, a gap is reserved between the side wall of the shell and the side wall of the shaft ring so that the shaft ring can flexibly rotate and large particles can be prevented from entering the bearing, an annular roller path is arranged on the inner sides of the shaft ring and the seat ring, the inclination angle of the bottom of the roller path is the same as that of the side face of the tapered roller, the side wall of the roller path is a flange, the tapered roller is fully arranged in the roller path of the shaft ring and the seat ring, the outer side of the tapered roller is in contact with the flange, the upper end of the side wall of the shell is pressed inwards so that the seat ring and the shaft, during interior oil blanket embedding groove platform, outer oil blanket was the elastic component, and outer oil blanket block is in the clearance department between the shaft collar in the tapered roller outside and the seat circle to prevent inside little granule debris such as water, dust got into the bearing, prevent simultaneously that bearing grease from spilling over.

Preferably, the outer side of the outer oil seal ring is provided with an annular seal ring groove.

Has the advantages that: the double-roller path of the thrust tapered roller bearing special for the steering knuckle can ensure that the bearing can be used for a long time under severe working environment; the triple protection of shell, outer oil seal circle, interior oil seal circle can block that rubble, sewage, dust etc. get into the bearing, can effectively reduce spilling over of bearing lubricating grease simultaneously.

Drawings

Fig. 1 is a schematic sectional structure view of the tapered roller thrust bearing dedicated for a knuckle of the present invention.

Fig. 2 is a schematic sectional structure view of the race and the race of the tapered roller thrust bearing for a knuckle according to the present invention.

In the figure: the bearing ring comprises a shaft ring 10, a seat ring 20, a seat ring groove 201, a tapered roller 30, a raceway 301, a rib 302, a shell 40, an inner oil seal ring 50, a groove platform 501, an outer oil seal ring 60 and a seal ring groove 601.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Referring to fig. 1 and 2, a tapered roller thrust bearing for a steering knuckle includes a race 10, a race 20, tapered rollers 30, a housing 40, an inner oil seal ring 50, and an outer oil seal ring 60, wherein the bottom of the race 20 is provided with an annular race groove 201, the housing 40 is annular, the bottom of the housing 40 is embedded in the race groove 201, the housing 40 and the race 20 are press-fitted together, a gap is left between the sidewall of the housing 40 and the sidewall of the race 10 to allow the race 10 to rotate flexibly and prevent large particles from entering the bearing, annular raceways 301 are provided on the inner sides of the race 10 and the race 20, the inclination of the bottom of the raceway 301 is the same as that of the side surfaces of the tapered rollers 30, the sidewall of the raceway 301 is a rib 302, the tapered rollers 30 are fully installed in the raceways 301 of the race 10 and the race 20, the outer side of the tapered rollers 30 is in contact with the rib 302, the upper end of the sidewall of the housing 40 is pressed inward to wrap the race 20 and the race 10 of the bearing in the housing 40, the inner sides of the shaft ring 10 and the seat ring 20 are also provided with a groove platform 501 for installing the inner oil seal ring 50, the inner oil seal ring 50 is embedded into the groove platform 501, the outer oil seal ring 60 is an elastic part, and the outer oil seal ring 60 is clamped in a gap between the shaft ring 10 and the seat ring 20 outside the tapered roller 30 so as to prevent small-particle impurities such as water, dust and the like from entering the inside of the bearing and prevent lubricating grease of the bearing from overflowing.

The full complement roller bearing is formed by fully filling the tapered rollers 30 in the raceways 301 of the shaft washer 10 and the race 20, the full complement roller bearing is not provided with a retainer, and compared with a bearing with a retainer, the full complement roller bearing has higher bearing capacity, smaller radial section and space saving under the same width.

In the thrust tapered roller bearing with a single raceway in the prior art, only the raceway 301 is arranged on the race 20, and the working surface of the shaft ring 10 is a plane without the raceway 301. Thus, the axial force experienced by the bearing will produce a component force on the rib 302 of the raceway 301. Generally, the width of the rib 302 of the bearing is narrow, so that large stress is generated on the rib 302, and according to the tracking analysis of the single-roller-path 301 product, the early fatigue and fracture failure of the rib 302 is the most main failure mode of the bearing. In the present invention, the inner sides of the shaft ring 10 and the seat ring 20 are both provided with raceways 301 to form double raceways 301, so that the bearing has two flanges 302. The two ribs 302 can share the axial force of the tapered roller 30, and the stress borne by the ribs 302 is reduced, so that the service life of the bearing is prolonged.

In a preferred embodiment, the inner oil seal ring 50 is a plastic product. The main function of the inner oil seal ring 50 is to prevent contamination of the bearing due to improper handling, installation, etc. before use, and also to retain bearing grease.

In a preferred embodiment, the outer oil seal 60 is a rubber product.

Further, an annular seal groove 601 is formed on the outer side of the outer oil seal 60.

The outer oil seal ring 60 is clamped at the gap between the shaft ring 10 and the seat ring 20 outside the tapered roller 30 by means of elasticity of the outer oil seal ring 60, the outer oil seal ring 60 is deformed after being installed in place, the seal ring groove 601 can remove pressure generated when the outer oil seal ring 60 is installed through extrusion deformation of the seal ring groove 601, if the seal ring groove 601 is not formed, the size requirement on the outer oil seal ring 60 is high, and the outer oil seal ring 60 cannot be easily installed due to overlarge size. However, in the case where the seal groove 601 is present, the deformation of the outer oil seal 60 is only to reduce the clearance of the seal groove 601, and the dimensional requirements for the outer oil seal 60 are relatively wide.

The tapered roller thrust bearing special for the steering knuckle can effectively block broken stone, sewage, dust and the like outside through triple protection of the shell 40, the outer oil seal ring 60 and the inner oil seal ring 50, meanwhile, the overflow of bearing lubricating grease can be reduced, and the service life of the bearing is prolonged.

Claims (2)

1. The utility model provides a special thrust tapered roller bearing of knuckle which characterized in that: the oil seal structure comprises a shaft ring, a seat ring, a tapered roller, a shell, an inner oil seal ring and an outer oil seal ring, wherein the bottom of the seat ring is provided with an annular seat ring groove, the shell is annular, the bottom of the shell is embedded into the seat ring groove, the shell and the seat ring are pressed into a whole, a gap is reserved between the side wall of the shell and the side wall of the shaft ring, an annular roller path is arranged on the inner side of the shaft ring and the seat ring, the inclination angle of the bottom of the roller path is the same as that of the side face of the tapered roller, the side wall of the roller path is a flange, the tapered roller is fully arranged in the roller path of the shaft ring and the seat ring, the outer side of the tapered roller is in contact with the flange, the upper end of the side wall of the shell is pressed inwards, the inner side of the shaft ring and the seat ring is also provided with a groove platform for installing the inner oil seal ring, the inner oil seal.

2. The tapered roller thrust bearing for a knuckle according to claim 1, wherein: and an annular seal ring groove is formed in the outer side of the outer oil seal ring.