Patent ID: 6261004
Filing Date: 2001-07-17
Classification: F16C,F16D,F16H,Y10T

Abstract:
A main shaft gear mechanism for automobile speed changers comprising an auxiliary shaft operatively connected to an input shaft associated with an automobile engine, an auxiliary shaft gear mounted on an auxiliary shaft, a main shaft operatively connected to an output shaft associated with the driving wheels, a main shaft gear which has a toothed portion integrally formed on its outer peripheral surface and constantly meshing with the auxiliary shaft gear and which has a raceway surface on its inner peripheral surface, a tapered roller bearing interposed between the main shaft and the main shaft gear, an imbalance means which produces a circumferential weight imbalance in the assembly of the tapered rollers and cage of the tapered roller bearing, a clutch gear connected to the main shaft gear, and a synchromechanism which effects or interrupts transmission of engine torque between the main shaft gear and the main shaft through the clutch gear by the action of a selector, wherein at least one of the roughness of the cone back face of the bearing inner ring and the roughness of the large end faces of the tapered rollers of the tapered roller bearing is not more than 0.05 .mu.mRa.