| 摘要 |
PURPOSE: A synchronizer extends life thereof and improves gearshift quality by forming a friction part of a synchronizer ring as a doubled structure. CONSTITUTION: The friction part of a synchronizer ring(20) comprises the first friction part(26) and the second friction part(28). The first friction part(26) is formed on the inner peripheric surface of the synchronizer ring(20) with equal interval to perform frictional operation with a cone part in the beginning. When the first friction part(26) is worn by the frictional operation thereof, the second friction part(28) formed between the first friction parts performs frictional operation secondly with the cone part. Thus, life of a synchronizer is extended and gearshift quality is improved by doubled structure of the synchronizer.
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