| 摘要 |
PCT No. PCT/NO82/00026 Sec. 371 Date Dec. 21, 1982 Sec. 102(e) Date Dec. 21, 1982 PCT Filed May 11, 1982 PCT Pub. No. WO82/04022 PCT Pub. Date Nov. 25, 1982.A terrain-traveling motor vehicle (1) has twin caterpillar tracks and bogie assemblies (2) pivotally attached to the frame (3) of the vehicle, comprising a rear pair of drive wheels (5) mounted on the frame (3) of the vehicle and a pair of front wheels (7) each of which is supported on a pivotable belt-tensioning arm (9) disposed on the forward end of a bogie arm (8) found on each bogie assembly (2). The rearward end of the bogie arm (8) is supported by shaft journals (4) proximate to and in front of the center axis of the pair of rear wheels (5). The bogie arms (8) are movable in the vertical plane by hydraulic pressure cylinders (6) controllable from the cab of the vehicle for upward and downward pivoting of the bogie assemblies simultaneously or independently of each other, and for tautening the bogie tracks. The belt-tensioning arms (9) are movable independently of the bogie arms (8) by means of respective hydraulic pressure cylinders (10) which are pressurized at a desired adjustable pressure for maintaining a desired tautness in the belt during the pivoting movement of the bogie arm (8), as well as during the continual changes in the configuration of the lower perimeter of the belt which arise as the track passes over irregular ground terrain. |
