SNOWMOBILE CHAIN TENSIONING DEVICE

摘要

Disclosed herein is a snowmobile including first and second idler members respectively located exteriorly of the opposite runs of a flexible endless member trained about driving and driven members supported by a chassis at a fixed distance from each other, means co-axially mounting the idler members for pivotal movement into engagement with the outer surface of the flexible endless member, and a unitary helical spring biasing the idler members in opposite rotative directions toward each other so as to engage the idler members with the outer surface of the flexible endless member and thereby to tension the flexible endless member.