| 主权项 |
1. A drive apparatus for an endless track of a snowmobile, the track having an outer surface and an inner surface, a plurality of tread lugs extending outwardly from the outer surface, a plurality of drive lugs extending inwardly from the inner surface, and a plurality of openings, the drive apparatus comprising:
a drive shaft having a longitudinal axis; and a drive sprocket coupled to the drive shaft, the drive sprocket including:
a pair of outer drive members, each outer drive member including a body portion having a center opening located over the drive shaft, a plurality of teeth extending generally parallel to the longitudinal axis of the drive shaft, and a first connecting web extending between each of the teeth of outer drive member, the plurality of teeth of the outer drive members being configured to engage the drive lugs on the inner surface of the track to move the track upon rotation of the drive shaft, and the first connecting web having first and second side angled surfaces aligned an angle of less than 180° relative to each other to minimize snow build up on the outer drive members, anda center drive member located between the outer drive members, the center drive member including a body portion having a center opening located over the drive shaft, a plurality of teeth extending radially outwardly from the body portion transverse to the longitudinal axis of the drive shaft, and a second connecting web extending between each of the teeth of the center drive member, the plurality of teeth of the center drive member being configured to enter the openings formed in the track upon rotation of the drive shaft, and the second connecting web also having first and second side angled surfaces aligned an angle of less than 180° relative to each other to minimize snow build up on the center drive member. |
