Torsion protector for a start gear box of an engine of a radio control model

摘要

A torsion protector for a start gear box of a radio control model includes a stopper securely sleeved on an input shaft that is connected to the start gear box. A resilient member is sleeved on the input shaft and abuts the stopper. A resistant axle seat is movably sleeved on the input shaft and abuts resilient such that the resilient member is pre-compressively mounted between the resistant axle seat and the stopper. A drive axle seat is pivotally mounted to a distal end of the input shaft for driving the resistant axle seat. The drive axle selectively pushes the resistant axle seat to make the resistant axle seat be disengaged from the input shaft for protecting the start gear box when a counterforce from the input shaft is greater than a restitution force of the resilient member.