| 摘要 |
A belt tensioning mechanism (31) is provided for use with a vehicle (10) having an axle (20) pivotably connected to a frame (14) of the vehicle with inextensible belts (26, 28) entrained about wheel assemblies (22, 24, 22 min , 24 min ) mounted on either side of the vehicle for transmitting tractive effort to the earth. An axle (20) is connected to a frame (14) by a swivel bearing (36) being slidably disposed on a pin (34), such that, the axle (20) moves longitudinally relative to the frame (14) while still being able to swivel about the pin (34). Furthermore, an adjusting mechanism (42) is provided to produce the force necessary to sufficiently tension the belts (26, 28) to provide frictional drive between the belts (26, 28) and the drive wheel assemblies (24, 24 min ). |
