| 摘要 |
Disclosed herein is a manual transmission synchronizer for automobiles. The manual transmission synchronizer is operated in such a way that a sleeve engaged with a clutch hub is moved in the direction of the manipulation of a gearshift lever by the manipulation of the gearshift lever, synchronizer keys push a synchronizer ring due to the movement of the sleeve, the synchronizer ring is brought into tight contact with and synchronized with the cone portion of a clutch gear by the pushing of the synchronizer ring, and the gear portions of the synchronizer ring and the clutch gear are moved into and engaged with the inner gear portion of the sleeve, thereby performing the shifting of gears. In the manual transmission synchronizer, the gear portion of the clutch hub is formed such that a part of the gear sub-portions situated between each pair of neighboring grooves of the clutch hub is extended to its both sides by a predetermined length, and the gear portions of the synchronizer rings are formed such that the gear sub-portions of the gear portions of the two synchronizer rings situated inside of each extended gear sub-portion of the clutch hub when the synchronizer rings are assembled with the clutch hub are not geared.
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