A shifting system

Abstract

The invention relates to a power conversion device of a mechanical transmission system, more particularly to a shifting system of an automobile transfer case. In the shifting system, drive pinion external splines, input shaft shifting external splines, shifting engagement sleeve internal splines and drive gearwheel external splines all employ the splines with the same modulus and teeth number, tooth crests of the engagement sleeve internal splines, the drive pinion external splines and the drive gearwheel external splines shrink inwards, the end face line, from the tooth crest to tooth root, of each spline positioned on the end face is processed from a shape of minus sign into a shape of reversed V, and the shifting engagement sleeve internal splines, the drive pinion shifting external splines, the input shaft shifting external splines and the drive gearwheel shifting external splines are regulated in the thickness of tooth thereof in the direction of axis. The head of the spline is designed with particular angle and shape, which can ensure fast positioning during the bonding of the splines, without the phenomenon of 'gear sliding' and 'out of gear'.

Description

technical field [0001] The invention relates to a power conversion device of a mechanical transmission system, in particular to a gear shifting system of an automobile transfer case. Background technique [0002] The existing shifting system of the automobile transfer case processes the splines of the shifting system in the following two ways: [0003] 1. The most common method is that the internal and external splines of the shifting system adopt a large tooth width and narrow tooth thickness structure in the tooth width direction. Oval; [0004] 2. For the inner and outer splines of the gear shifting system, long and short tooth spacing structures are adopted in the tooth length direction, and the heads of the long teeth of the outer splines or the long teeth of the inner splines of the gear shifting system can also be processed into arc shapes. [0005] Although these two methods are simple and economical to process, the shifting performance is not good. The main reason...

AI Technical Summary

Problems solved by technology

The shifting system adopts the second method, although the shifting performance is improved compared with the first one, but when the arc-shaped key head is in contact, the sliding direction of the inner and outer splines at the contact point and the angle of the force are too large large, thus limiting the increase in shift portability

Therefore, in the existing shift system, the end face teeth often have impact deformation and cannot be shifted.

In addition, because the inner and outer tooth surfaces of the shifting system are parallel to the axis and there is a sliding gap between the inner and outer splines of the coupling sleeve, when large torque is transmitted, the existing shifting system is prone to slipping and loosening of the inner and outer splines, resulting in "off-gear" , "stopping" phenomenon

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