Telescopic universal joint, drive shaft assembly and automobile

Abstract

The invention relates to the field of automobiles and provides a telescopic universal joint, a drive shaft assembly and an automobile. The telescopic universal joint comprises a driving shaft, a spider assembly connected to one end of the driving shaft, a driven shaft and a slide bushing connected to one end of the driven shaft, wherein the spider assembly comprises a spider comprising three hinge pins as well as three spherical rings arranged at end parts of the three hinge pins in a sleeving manner respectively, the slide bushing is sleeved with the spider assembly in a matched manner, and the three spherical rings can slide along corresponding slide ways in the slide bushing; and the end parts of the three hinge pins are formed as spheres or parts of the spheres, so that the hinge pins and the spherical rings can form a spherical hinge structure. The telescopic universal joint can obtain larger swing angle, better torque transmission effect and simpler and more reliable structure.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a telescopic universal joint, a drive shaft assembly and an automobile. Background technique [0002] For telescopic universal joints used in the drive shaft assembly of automobiles, the existing structure generally includes: a drive shaft, a tripod assembly connected to one end of the drive shaft, a driven shaft and a drive shaft connected to the driven shaft. The sliding sleeve at one end of the shaft, the tripod assembly includes a tripod, the tripod includes three pins, the tripod assembly also includes three ball rings respectively sleeved on the ends of the three pins, the tripod The components fit into the sliding sleeve and the three ball rings can slide along the corresponding slideways in the sliding sleeve; among them, the pin shaft of the tripod frame and the ball ring are connected by needle bearings, which is a cylindrical fit , the connecting kinematic pair is...

AI Technical Summary

Problems solved by technology

[0002] For telescopic universal joints used in the drive shaft assembly of automobiles, the existing structure generally includes: a drive shaft, a tripod assembly connected to one end of the drive shaft, a driven shaft and a drive shaft connected to the driven shaft. The sliding sleeve at one end of the shaft, the tripod assembly includes a tripod, the tripod includes three pins, the tripod assembly also includes three ball rings respectively sleeved on the ends of the three pins, the tripod The components fit into the sliding sleeve and the three ball rings can slide along the corresponding slideways in the sliding sleeve; among them, the pin shaft of the tripod frame and the ball ring are connected by needle bearings, which is a cylindrical fit , the connecting kinematic pair is a sliding pair. When the ball ring swings at a large angle relative to the tripod, the movement changes, which in turn causes an increase in the axial derived force between the ball ring and the sliding sleeve, so that the telescopic universal joint is in the torque transmission process. At the same time, because the kinematic pair connecting the tripod frame and the ball ring is a sliding pair in its structure, the ball ring can only move along the axis of the pin shaft of the tripod frame, and cannot realize the swing function, thus limiting The maximum swing angle of the universal joint, and there are many structural components that need needle roller bearings, and the assembly process is complicated. When the universal joint works at a large swing angle, the constant velocity performance is poor and the torque transmission efficiency is low

[0003] As people's requirements for vehicle passability continue to increase, the chassis of SUV models is also continuously improved, and the demand for vehicle turning radius is getting smaller and smaller. The maximum working swing angle of the above-mentioned existing telescopic universal joint is 22.5°, which is no longer possible. Satisfy the needs of large-angle steering and wheel run-out of automobiles, that is, the movement limit requirements of the high-chassis and large-travel SUV suspension run-out structure exceed the function of the traditional drive shaft moving joint; The non-uniform velocity performance of the vehicle is particularly obvious, which causes problems such as vibration and noise of the transmission system. In order to meet the NVH performance of the large-angle arrangement of the drive shaft of the vehicle and the requirements of large-stroke suspension and small turning radius, it is necessary to design a new type of telescopic type. Universal joint structure to eliminate or reduce the shortcomings of the existing structure, and better meet the design and layout development of the whole vehicle

Images