Planet gear type speed reduction starter

摘要

A planetary gear system for the speed reduction out­put of a starter motor. The internal gear (3) is made of an elastic resin and is separated from the casing of the system or a metal ring (22) fitted in the casing by a predetermined gap (23). Thereby, the internal gear (3) can deform over a range of shocks but is prevented from deforming by the casing or metal ring (22) above this shock range.