| 摘要 |
The support arrangement a swinging arm(22) pivoting on the frame(20) of the vehicle, a support frame(30) with an intermediate section(36) mounted on the swinging arm close to the swinging arm's free end(28) so as to provide a swivelling movement of the support frame relative to the swinging arm, and a number of rollers(40) fitted on the support frame and for revolving contact with a track(14) or chain of the vehicle. The swinging arm pivots downwards from a normal position through a range of positions to keep the rollers in contact with the track when passing over uneven sections of the ground. |
