CN214404321U

CN214404321U - Transmission shaft intermediate structure

Info

Publication number: CN214404321U
Application number: CN202120054387.4U
Authority: CN
Inventors: 陈龙
Original assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Current assignee: Wanxiang Group Corp; Wanxiang Qianchao Transmission Shaft Co Ltd
Priority date: 2021-01-08
Filing date: 2021-01-08
Publication date: 2021-10-15
Anticipated expiration: 2031-01-08

Abstract

The utility model discloses a transmission shaft intermediate structure relates to the automotive transmission shaft field, including intermediate junction fork, middle integral key shaft, support and ring, intermediate junction fork and middle integral key shaft pass through spline fit to be connected, all suit a ring on the axle journal of intermediate junction fork and middle integral key shaft, install the support bearing between two rings, the support mounting is on the support bearing, and the upper and lower both ends of this support are close to ring department and have the rubber seal lip, each rubber seal lip and the ring contact seal who corresponds. The utility model has the advantages that: and the heat treatment deformation of the spline is prevented from being transmitted to the sealing contact part. In addition, the ring is made of non-steel materials (such as nylon and the like), the contact friction sound of rubber and the ring is smaller, the sealing interference range can be designed to be increased, and the muddy water prevention performance is enhanced.

Description

Transmission shaft intermediate structure

Technical Field

The utility model relates to a field of car transmission shaft, concretely relates to transmission shaft intermediate structure.

Background

The middle connecting part of the existing multi-section transmission shaft consists of a middle spline shaft, a bracket and a middle connecting fork. The rubber sealing lip of the bracket is contacted with the middle spline shaft and the outer circular iron journal of the middle connecting fork to form sealing, so that muddy water is prevented from entering the inside of the bracket.

In order to meet the requirements of rotation and torque, the middle connection fork and the middle spline shaft are in spline fit, the outer spline of the middle spline shaft needs to be subjected to heat treatment, the heat treatment deformation is large, after press fitting, the deformation error is transmitted to the outer circular surface of the middle connection fork, the coaxiality difference between the lip of the support and the outer circular surface of the middle connection fork is caused, the interference magnitude of one side is larger than a designed value, friction noise occurs during rotation, the interference magnitude of one side is smaller than the designed value, and muddy water enters the inside.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a transmission shaft intermediate structure, solved current transmission shaft intermediate structure's shortcoming, satisfied the functional requirement again.

The purpose of the utility model is accomplished through following technical scheme: the middle structure of the transmission shaft comprises a middle connection fork, a middle spline shaft, a support and rings, wherein the middle connection fork is connected with the middle spline shaft in a spline fit mode, the shaft necks of the middle connection fork and the middle spline shaft are respectively sleeved with one ring, a support bearing is arranged between the two rings, the support is arranged on the support bearing, rubber sealing lips are arranged at the positions, close to the rings, of the upper end and the lower end of the support, and each rubber sealing lip is in contact sealing with the corresponding ring.

As a further technical scheme, each circular ring is matched with an assembly excircle of the support bearing so as to ensure the coaxiality.

As a further technical scheme, the circular ring is made of a nylon material.

The utility model has the advantages that: and the heat treatment deformation of the spline is prevented from being transmitted to the sealing contact part. In addition, the ring is made of non-steel materials (such as nylon and the like), the contact friction sound of rubber and the ring is smaller, the sealing interference range can be designed to be increased, and the muddy water prevention performance is enhanced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: the middle connecting fork 1, the middle spline shaft 2, the bracket 3, the circular ring 4, the bracket bearing 5 and the rubber sealing lip 6.

Detailed Description

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

example (b): as shown in fig. 1, the transmission shaft intermediate structure includes an intermediate connection fork 1, an intermediate spline shaft 2, a bracket 3 and rings 4, wherein the intermediate connection fork 1 and the intermediate spline shaft 2 are connected in a spline fit manner, the journals of the intermediate connection fork 1 and the intermediate spline shaft 2 are respectively sleeved with one ring 4, a bracket bearing 5 is installed between the two rings 4, the bracket 3 is installed on the bracket bearing 5, rubber sealing lips 6 are arranged at the upper end and the lower end of the bracket 3 near the rings 4, and each rubber sealing lip 6 is in contact sealing with the corresponding ring 4. Preferably, each ring 4 cooperates with the fitting outer circle of the support bearing 5 to ensure coaxiality. The circular ring 4 is made of nylon material (or other non-steel materials).

The utility model discloses a transmission shaft intermediate structure has newly increased two rings. And the heat treatment deformation of the spline is prevented from being transmitted to the sealing contact part. In addition, the ring is made of non-steel materials (such as nylon and the like), the contact friction sound of rubber and the ring is smaller, the sealing interference range can be designed to be increased, and the muddy water prevention performance is enhanced. To sum up, the utility model discloses when solving current transmission shaft intermediate structure defect, strengthened the functional requirement again, have good application prospect.

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. A transmission shaft intermediate structure is characterized in that: including intermediate junction fork (1), middle integral key shaft (2), support (3) and ring (4), intermediate junction fork (1) and middle integral key shaft (2) are connected through spline fit, all suit one ring (4) on the axle journal of intermediate junction fork (1) and middle integral key shaft (2), install support bearing (5) between two ring (4), install on support bearing (5) support (3), the upper and lower both ends of this support (3) are close to ring (4) and locate to have rubber seal lip (6), and each rubber seal lip (6) is sealed with ring (4) contact that corresponds.

2. The propeller shaft intermediate structure according to claim 1, wherein: each ring (4) is matched with the assembly excircle of the bracket bearing (5) to ensure the coaxiality.

3. The propeller shaft intermediate structure according to claim 1 or 2, wherein: the circular ring (4) is made of nylon materials.