Patent ID: 9533563
Date: 2017-01-03
CPC Classifications: B60K,F16D,F16H

Claim:
1. A reduction gear comprising: a shaft including a gear portion; and a ring gear mounted to the shaft at a position away from the gear portion of the shaft, wherein the shaft has at the position in the outer periphery thereof a plurality of stepped first teeth arranged along the circumferential direction of the shaft, wherein each first tooth has a lower portion and a higher portion that is higher than and contiguous to the lower portion in the axial direction of the shaft, the higher portion having a step surface that is contiguous to the lower portion, wherein the ring gear has in the inner periphery thereof a plurality of second teeth arranged along the inner circumference of the ring gear, wherein the second teeth are fitted to grooves between the first teeth through splines; and wherein the second teeth are set in contact with the step surfaces of the first teeth.