| 摘要 |
PURPOSE:To enable cushioning without reducing the engagement accuracy by providing a toothed wheel loose-fittedly supported on a supporting shaft and a boss part fixed on the supporting shaft so as to be adjacent, and combining the space between a ring-shaped outer ring projectedly formed from the side of the toothed wheel and the outer surface of the boss part with a damper rubber. CONSTITUTION:In a reduction gear 6d, the space between the boss part B press-fitted on an output shaft 6b and a toothed wheel R is combined with a baked rubberlike elastic body E. An end plate 63 extending from the end of the toothed wheel R toward inside prevents the shaft center of the toothed wheel R and that of the boss part B from becoming eccentric by a transmission force. A restricting device 8 is made up of recesses 64 on the end plate 63 and projections 65 on the boss part B, and it is so arranged that each of the recesses 64 and the projections 65 when assembled has clearances 66 on both sides. Accordingly, when the deformation of the elastic body E during power transmission is within the range of the clearances 66, the restriction is not caused, and when the deformation of the elastic body E becomes large enough, the projections 65 are brought into contact with the inner walls of the recesses 64 to prevent further turning, and the sudden change in the driving force acting on a rearwheel driving system can be relieved. |
