Patent ID: 9550536
Date: 2017-01-24
CPC Classifications: B62D

Claim:
1. An idler group for a mobile machine having a tracked undercarriage with an endless track, the idler group comprising: an idler configured to guide the endless track; an axle disposed through a central opening in the idler and configured to permit the idler to rotate relative to the axle; and a retainer disposed on the axle and within an opening in the idler, the retainer configured to achieve an interference fit with the idler sufficient to hold the retainer within the opening of the idler during operation of the mobile machine; wherein the idler includes an inner surface having an inner diameter, the retainer includes an outer surface having an outer diameter greater than the inner diameter, both of the outer and inner surfaces including threads that cooperatively engage each other, and the outer and inner surfaces contact one another to achieve the interference fit when the retainer is disposed within the opening of the idler.