A TRACTOR UNIT DRIVE GEAR ENGAGEMENT DEVICE

摘要

A travel drive gear (310) engagement mechanism for a tractor unit (300) includes a clutch lever (320) that has a cam portion (320A). The clutch lever (320) is configured to rotate between a first position and a second position at a point that is offset from a center of an elongated portion of the cam portion (320A). The engagement mechanism also includes a connecting member (311) that operatively connects the cam portion (320A) of the clutch lever (320) to a drive gear (310) of a tractor unit (300). The connecting member (311) is operatively connected to the cam portion (320A) at the offset point. The clutch level (320) and connecting member (311) are configured such that the drive gear (310) engages a track gear (310) when the clutch lever is in the first position and disengages from the track gear (130) when the clutch lever (320) is in the second position.