Synchronizers and Gearboxes

Abstract

The invention provides a synchronizer and a gearbox. The radial outer wall of a gear hub is provided with a boss extending to the direction of a middle ring. When the gearbox needs gear shift and a synchronizer gear sleeve drives an outer ring and the middle ring to move leftwards or rightwards to the neutral gear position, the boss limits continued motion of the middle ring to the direction of the gear hub, the outer ring can continue to move toward the direction of the gear hub, at the moment, a vacuum adsorption face appearing due to synchronous rotation between the middle ring and the outer ring is damaged, and the outer ring does not have rotation speed of a combined gear connected with the middle ring any longer after leaving the middle ring. Therefore, the outer ring drives the synchronizer gear sleeve and the gear hub to decrease speed together, after the rotation speed is decreased, gear engaging to another combined gear can be easy, large rotation speed difference appearing when the gear hub is connected to another combined gear directly when still having the rotation speed of the former combined gear is avoided, thus the conditions of difficult gear engaging or wrong gear are avoided, and driving safety is ensured.

Description

technical field [0001] The invention relates to the field of automobile manufacturing, and more specifically, to a synchronizer and a gearbox. Background technique [0002] At present, the three-piece set of the synchronizer is the necessary original for the gear shifting of the double-cone and above synchronizer, but it is easy to appear that the contact surface between the middle ring of the three-piece set and the inner and outer rings is firmly adsorbed and cannot be disengaged during the shifting process. In this case, the outer ring cannot be decelerated, and other gears cannot be shifted, or the wrong gear may occur, and when the middle ring cannot be separated from the inner and outer rings, the meshing conical surfaces are prone to serious consequences of burning and burning. And then affect driving safety. [0003] Therefore, it is a problem to be solved urgently to design a synchronizer and a gearbox that have a simple structure and can separate the intermediate ...

AI Technical Summary

Problems solved by technology

[0002] At present, the three-piece set of the synchronizer is the necessary original for the gear shifting of the double-cone and above synchronizer, but it is easy to appear that the contact surface between the middle ring of the three-piece set and the inner and outer rings is firmly adsorbed and cannot be disengaged during the shifting process. In this case, the outer ring cannot be decelerated, and other gears cannot be shifted, or the wrong gear may occur, and when the middle ring cannot be separated from the inner and outer rings, the meshing conical surfaces are prone to serious consequences of burning and burning. affect driving safety

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