Synchronous ring for synchronizer and method for manufacturing synchronous ring

Abstract

The invention discloses a synchronous ring for a synchronizer and a method for manufacturing the synchronous ring. The synchronous ring comprises a synchronous ring base, and a friction plate is arranged in the synchronous ring base and consists of a flexible base layer and a friction layer which are compounded. A combined structure consisting of the flexible base layer and the friction layer replaces an existing machined friction layer structure, a hard friction material without elasticity and toughness is improved to form a bendable adhesive friction material without being machined, and a friction abrasion performance and reliability of the synchronous ring are improved. In addition, an oil drainage groove is directly pressed on the friction layer, process is simplified, and cost is lowered. Besides, the platy friction plate can be cut into various shapes according to actual needs, the process is simple, machining is omitted, materials are saved, and the synchronous ring is applicable to synchronizers.

Description

technical field [0001] The invention relates to a synchronizer friction element, in particular to a synchronizer ring for a synchronizer and a manufacturing method thereof. Background technique [0002] The synchronizing ring is an important part of the synchronizer, and it is the friction element of the synchronizer set by the automobile transmission to make the gear shift light and silent and prolong the life of the coupling teeth. It generates frictional torque with the matched conical surface to synchronize the active and passive elements in an instant, so as to realize the non-impact and light and silent shifting of the active and passive gear ends. [0003] At present, the manufacturing methods of the synchronous ring mainly include the following: forging brass machining spiral, molybdenum thermal spraying, bronze sintering, carbon-based pressing and firing process, etc. [0004] 1. Forged brass machining spirals - the earliest developed and put into production applic...

AI Technical Summary

Problems solved by technology

It has the advantages of simple manufacturing process and good wear resistance, but has the disadvantages of expensive molybdenum, insufficient friction coefficient and poor overload resistance;

[0006] 3. Bronze sintering -- the technology of sintered bronze material used in the friction ring of synchronizer is developed by German Hoerbiger Company and applied in mass production. It is wear-resistant, high production efficiency and low cost, but there is insufficient dynamic friction coefficient and chemical reaction with oil. shortcoming;

This kind of synchronous ring has the advantages of high dynamic friction coefficient and wear resistance, but its material utilization rate is low, more than 80% of the friction material is removed by machining, and the bonding reliability between the friction layer and the synchronous ring base is poor

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