Composite differential device for four-drive transmission system

Abstract

The invention discloses a differential mechanism in transmission system of four wheel driving vehicle, comprising compound differential mechanism and rear axle differential mechanism. The compound differential mechanism comprises inter-axle differential mechanism and front-bridge differential mechanism. The rear axle differential mechanism adopts no-slip differential mechanism. In the technological scheme of invention the whole compound differential mechanism takes a place of separated inter-axle differential mechanism and front-bridge differential mechanism. The technological scheme provided in the invention is set in vehicle gearbox so as to make the chassis structure of four wheel driving vehicle compact. Viscous coupling is set in independent box and the viscous coupling is mated with compound differential mechanism to use. Before dynamic distribution the power of driving bridge can improve the cross-country performance of four wheel driving vehicle.

Description

technical field [0001] The invention relates to the technical field of four-drive drive train manufacturing, and more specifically relates to a compound differential device used in the four-drive drive train. technical background [0002] At present, the ordinary differential gear used in four-wheel drive vehicles is mainly composed of cross shafts, side gears, planetary bevel gears, and differential housings. This kind of differential is only "not torsion at differential speed", and the characteristic of "not torsion at differential speed" has an adverse effect on the driving of the vehicle. For example, when one side of the wheel is stuck in mud, it will slip due to insufficient adhesion. At this time, the driving force of the other wheel will not increase, but will decrease, resulting in a significant reduction in the traction force of the whole machine. [0003] In order to improve the passing performance of the four-wheel drive vehicle, a differential is installed betw...

AI Technical Summary

Problems solved by technology

[0003] In order to improve the passing performance of the four-wheel drive vehicle, a differential is installed between the front axle, the rear axle and the front and rear axles, and the front and rear axle differentials are anti-slip differentials, which effectively solves the phenomenon of "differential speed without twisting". , but the power transmission structure of this structure is complex and takes up a lot of space, which affects the layout space of the chassis system; and when the front axle differential adopts a non-slip differential, if the front wheel on one side of the vehicle loses adhesion, this type of non-slip differential will be damaged. The differential will be locked, and once the differential is temporarily locked, the vehicle will lose its steering function, which will lead to an accident in severe cases

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