Automotive transmission synchronizer

Abstract

The invention discloses an automotive transmission synchronizer which comprises a gear sleeve, a gear hub and a synchronizing ring. An inner spline and an outer spline are installed together in a matching mode, the synchronizing ring is arranged on the axial end face of the gear hub, gear sleeve grooves are evenly distributed in the inner peripheral wall of the gear sleeve, and L-shaped gear hub grooves are symmetrically formed in the gear hub, in the positions corresponding to the gear sleeve grooves and in the axial end face of the gear hub. Compression steel ball assemblies are arranged in the gear sleeve grooves, and a steel ball butts against the gear hub through the effect of the spring. Ejecting blocks are arranged in the gear hub grooves respectively, the surfaces of one ends of the ejecting blocks face to one end of the gear sleeve and are inclined faces with higher outer sides and lower inner sides, the surfaces can be contacted with the steel ball to receive pressure from the steel ball, the other ends of the ejecting blocks are arc faces, butt against the groove walls of the gear hub grooves, are rotated along with variation of stress of the inclined face ends, the outer side faces of the ejecting blocks are contacted with the end face of the synchronizing ring, so that the synchronizing ring is pushed. The automotive transmission synchronizer can thoroughly break an oil film of a synchronous conical face to increase a friction coefficient of the synchronous conical face.

Description

technical field [0001] The invention relates to an automobile transmission synchronizer. Background technique [0002] Synchronizers are often installed in automobile transmissions, and their function is to prevent the impact of the coupling teeth when the transmission shifts gears while the vehicle is moving, so as to prolong the life of the gear teeth and reduce noise. [0003] At present, the commonly used automobile synchronizers, especially the transmission synchronizers used in cars, mostly use the synchronizer slider to realize the synchronizer pre-synchronization function during the shifting process. The pre-synchronization is to position the gear ring and eliminate the gap between the synchronous cone surfaces At the same time, it destroys the oil film between the friction cones, so as to increase the friction coefficient of the synchronous cones. Since the destruction of the oil film requires a certain pressing force on the gear ring, the greater the pressing forc...

AI Technical Summary

Problems solved by technology

For the synchronizer using the synchronizer slider, the preload force of the synchronizer ring is mainly provided by the slider spring force, but due to its own structure and shifting force requirements, the value of the slider spring force There are certain limitations, resulting in incomplete destruction of the oil film and the inability to effectively increase the friction coefficient of the synchronous cone surface, which in turn leads to the inability to increase the preload of the synchronizer

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