| 摘要 |
The track system includes a plurality of track assemblies, each having track; a frame structure to mount the track to the vehicle; and inner wheels in contact with an inner surface of the track. The track assembly also includes two drive gears disposed externally to the track and configured to frictionally engaged an outer surface of a corresponding one of the tires. The drive gears are drivingly connected with the track for transmitting power thereto. Each one of the drive gears has a rotation axis, a plurality of elongated traction bars extending substantially parallel and circumferentially to the rotation axis, and open ends. The elongated traction bars are spaced-apart from one another and define channels therebetween allowing granular and liquid materials to flow inwardly towards the rotation axis, and outwardly of the drive gears through the apertured ends.
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