CN112721626A

CN112721626A - Commercial vehicle transmission shaft intermediate bearing assembly and machining process

Info

Publication number: CN112721626A
Application number: CN202110149611.2A
Authority: CN
Inventors: 公彦军; 李萌芳; 郭旺喜; 高蕊; 傅运军; 张玉辛; 管伟强; 李江辉; 周毅展
Original assignee: Sinotruk Jinan Power Co Ltd
Current assignee: Sinotruk Jinan Power Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2021-04-30

Abstract

The invention provides a middle support assembly of a transmission shaft of a commercial vehicle and a processing technology, wherein the support assembly comprises a support seat, a buffer disc, a bearing seat and a deep groove ball bearing; the supporting seat, the buffer disc and the bearing seat are of an integrated structure; the inner diameter of the bearing seat and the outer diameter of the outer ring of the deep groove ball bearing are both arc-surface structures and form a joint bearing structure, and a limiting mechanism for limiting the rotation of the outer ring of the deep groove ball bearing is arranged between the bearing seat and the deep groove ball bearing and can compensate the influence of assembly errors on the intermediate support assembly.

Description

Commercial vehicle transmission shaft intermediate bearing assembly and machining process

Technical Field

The invention relates to the technical field of a bearing assembly, in particular to a middle bearing assembly of a transmission shaft of a commercial vehicle and a processing technology, which is used for transmission shafts of trucks, dumpers and partial special vehicles.

Background

Due to the long wheel base of the truck, the dump truck and part of special vehicles, in order to improve the critical rotating speed of the transmission shaft, avoid resonance and consider the requirement of overall arrangement of the whole vehicle, 2 to 3 transmission shafts are generally arranged, and at the moment, an intermediate support assembly is required to be added. Due to the influence of matching design errors, manufacturing machining errors and assembly errors of the whole vehicle, the intermediate support assembly is often subjected to additional moment after being installed on the whole vehicle, so that abnormal abrasion is caused.

Disclosure of Invention

The invention aims to provide a middle bearing assembly of a transmission shaft of a commercial vehicle and a machining process, and solves the problem that the performance of the middle bearing assembly is influenced by matching design errors, manufacturing errors and assembly errors of the whole vehicle.

In order to achieve the purpose, the invention provides the following technical scheme: the invention provides a middle bearing assembly of a transmission shaft of a commercial vehicle, which comprises a supporting seat, a buffer disc, a bearing seat and a deep groove ball bearing, wherein the supporting seat is arranged on the middle bearing assembly; the supporting seat, the buffer disc and the bearing seat are of an integrated structure; the inner diameter of the bearing seat and the outer diameter of the outer ring of the deep groove ball bearing are both arc surface structures and form a joint bearing structure, and a limiting mechanism for limiting the rotation of the outer ring of the deep groove ball bearing is arranged between the bearing seat and the deep groove ball bearing.

As a further improvement of the technical scheme, the inner diameter of the bearing seat is provided with a limiting step, the outer ring of the deep groove ball bearing is provided with a limiting groove, and the limiting mechanism is arranged in the limiting step and the limiting groove.

As a further improvement of the technical scheme, the number of the limiting mechanisms is two, and the two limiting mechanisms are arranged in a bilateral symmetry mode.

As a further improvement of the above technical scheme, the limiting mechanism comprises a limiting steel ball and a limiting spring; the limiting steel balls are arranged at two ends of the limiting spring.

As a further improvement of the technical scheme, a plurality of damping grooves are arranged on the buffer disc.

As a further improvement of the above technical solution, four damping grooves are arranged along four directions of the circumference of the buffer disc.

As a further improvement of the technical scheme, the support seat is made of aluminum alloy.

As a further improvement of the technical scheme, the buffer disc is made of polyurethane.

As a further improvement of the technical scheme, the bearing seat is made of steel.

The invention provides a processing technology of a middle support assembly of a transmission shaft of a commercial vehicle, wherein a supporting seat and a bearing seat are respectively and independently processed, and the inner diameter of the bearing seat is ground into an arc surface and two bilaterally symmetrical limiting steps are machined; the supporting seat and the bearing seat are integrally vulcanized and molded with the polyurethane material of the buffer disc after being manufactured; and grinding the outer diameter of the outer ring of the deep groove ball bearing into a cambered surface, machining two limiting grooves which are bilaterally symmetrical, and assembling the deep groove ball bearing with the supporting seat, the buffer disc and the bearing seat vulcanization assembly after a limiting spring and two limiting steel balls are placed into each limiting groove.

Compared with the prior art, the invention has the beneficial effects that: the joint bearing structure formed by the inner diameter of the steel bearing seat and the outer diameter of the outer ring of the deep groove ball bearing can compensate the influence of assembly errors on the middle supporting assembly, and the limiting mechanism can limit the outer ring of the deep groove ball bearing to only swing and cannot rotate in the circumferential direction.

Drawings

FIG. 1 is a front view, partially in section, of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a partial cutaway isometric view of the present invention;

FIG. 4 is a left side elevational view, in full section, of the present invention;

fig. 5 is a top view of the present invention.

Reference numerals: the device comprises a support seat 1, a buffer disc 2, a bearing seat 3, a deep groove ball bearing 4, a limiting steel ball 5, a limiting spring 6 and a damping groove 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5 together, on one hand, the invention discloses a middle support assembly of a transmission shaft of a commercial vehicle, which comprises a support seat 1, a buffer disc 2, a bearing seat 3, a deep groove ball bearing 4 and a limiting mechanism; the supporting seat 1, the buffer disc 2 and the bearing seat 3 are of an integrated structure, and the supporting seat 1, the buffer disc 2 and the bearing seat 3 are vulcanized into a whole when being integrally formed, wherein the supporting seat 1 is made of aluminum alloy, and the supporting seat 1 is made of aluminum alloy, so that the weight of the assembly can be reduced; the buffer disc 2 is made of polyurethane, and the corrosion resistance and the high resilience of the buffer disc 2 can be improved by adopting the polyurethane; the bearing seat 3 is made of steel.

As a further improvement of the technical scheme, the inner diameter of the bearing seat 3 and the outer diameter of the outer ring of the deep groove ball bearing 4 are both arc structures and form a joint bearing structure, and after the middle support assembly is installed on the whole vehicle, the deep groove ball bearing 4 can swing freely to compensate the influence of assembly errors on the middle support assembly, so that abnormal abrasion caused by additional moment on the buffer disc 2 is avoided.

As a further improvement of the above technical solution, a limiting mechanism is arranged between the bearing seat 3 and the deep groove ball bearing 4 for limiting the rotation of the outer ring of the deep groove ball bearing 4, wherein a limiting step is arranged on the inner diameter of the bearing seat 3, a limiting groove is arranged on the outer ring of the deep groove ball bearing 4, and the limiting mechanism is arranged in the limiting step and the limiting groove.

As a further improvement of the technical scheme, the number of the limiting mechanisms is two, and the two limiting mechanisms are arranged in a bilateral symmetry manner; the limiting mechanism comprises a limiting steel ball 5 and a limiting spring 6; the limiting steel balls 5 are arranged at two ends of the limiting springs 6, the outer ring of the deep groove ball bearing 4 can only swing under the action of the limiting steel balls 5 and the limiting springs 6 in the working process, and the rotation of the outer ring of the deep groove ball bearing 4 can be limited due to the fact that the outer ring can not rotate circumferentially.

As a further improvement of the above technical solution, a plurality of damping grooves 7 are provided on the buffer disc 2, four damping grooves 7 are provided along four directions of the circumference of the buffer disc 2, and the damping grooves 7 play a role in damping.

The invention discloses a processing technology of a commercial vehicle transmission shaft intermediate support assembly, wherein a supporting seat and a bearing seat are respectively and independently processed, and the inner diameter of the bearing seat needs to be ground into an arc surface and two bilaterally symmetrical limiting steps are machined; the supporting seat and the bearing seat are vulcanized and molded together with the polyurethane material of the buffer disc into a whole after being manufactured; and grinding the outer diameter of the outer ring of the deep groove ball bearing into a cambered surface, machining two limiting grooves which are bilaterally symmetrical, and assembling the deep groove ball bearing with the supporting seat, the buffer disc and the bearing seat vulcanization assembly after a limiting spring and two limiting steel balls are placed into each limiting groove.

In conclusion, the joint bearing structure formed by the inner diameter of the steel bearing seat and the outer diameter of the outer ring of the deep groove ball bearing can compensate the influence of assembly errors on the middle bearing assembly, and the limiting spring and the limiting steel ball can limit the outer ring of the deep groove ball bearing to only swing and not to circumferentially rotate.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A commercial vehicle drive shaft intermediate support assembly, characterized in that it comprises a support seat (1), a buffer disk (2), a bearing seat (3) and a deep groove ball bearing (4); the support seat (1) ), the buffer disc (2) and the bearing seat (3) are integrated; the inner diameter of the bearing seat (3) and the outer diameter of the outer ring of the deep groove ball bearing (4) are both arc structures and form a joint bearing structure, A limiting mechanism for restricting the rotation of the outer ring of the deep groove ball bearing (4) is arranged between the bearing seat (3) and the deep groove ball bearing (4).

2 . The intermediate support assembly of a commercial vehicle transmission shaft according to claim 1 , wherein the inner diameter of the bearing seat ( 3 ) is provided with a limiting step, and the outer ring of the deep groove ball bearing ( 4 ) has a limit step. 3 . A limit groove is provided, and the limit mechanism is arranged in the limit step and the limit groove.

3 . The intermediate support assembly for a drive shaft of a commercial vehicle according to claim 2 , wherein there are two limiting mechanisms, and the two limiting mechanisms are arranged symmetrically from left to right. 4 .

4. A commercial vehicle drive shaft intermediate support assembly according to claim 3, wherein the limit mechanism comprises a limit steel ball (5) and a limit spring (6); the limit steel The balls (5) are arranged at both ends of the limit spring (6).

5 . The intermediate support assembly of a commercial vehicle transmission shaft according to claim 1 , wherein a plurality of shock-absorbing grooves ( 7 ) are provided on the buffer plate ( 2 ). 6 .

6 . The intermediate support assembly of a commercial vehicle transmission shaft according to claim 5 , wherein the shock-absorbing groove ( 7 ) is provided along the circumference of the buffer disc ( 2 ) in four directions: up, down, left, and right. 7 . four.

7 . The intermediate support assembly of a commercial vehicle transmission shaft according to claim 1 , wherein the material of the support seat ( 1 ) is aluminum alloy. 8 .

8 . The intermediate support assembly of a commercial vehicle transmission shaft according to claim 1 , wherein the buffer disc ( 2 ) is made of polyurethane. 9 .

9 . The intermediate support assembly of a commercial vehicle drive shaft according to claim 1 , wherein the bearing seat ( 3 ) is made of steel. 10 .

10. A processing technology for the intermediate support assembly of a commercial vehicle drive shaft, characterized in that the support seat and the bearing seat are processed separately, the inner diameter of the bearing seat is ground into an arc surface and two limit steps are machined symmetrically on the left and right; the support seat The outer diameter of the outer ring of the deep groove ball bearing is ground into an arc surface and two limit grooves are machined symmetrically on the left and right, and each limit groove is placed in the After inserting a limit spring and two limit steel balls, assemble the deep groove ball bearing with the support seat, buffer disc and bearing seat vulcanized assembly.