| 摘要 |
<p>Wheeled vehicles, such as wheelchairs 100, that are adapted to traverse obstacles are provided. The wheeled vehicles 100 include a frame 102, drive wheels 132, front anti-tip wheels 120, 212 positioned in front of the drive wheels 132 and rear anti-tip wheels 108 positioned behind the drive wheels. One exemplary vehicle includes front anti-tip wheels 120, 121 supported by rigid arms 191 that are fixed to the frame 102 and drive assemblies 104, 105 that are independently suspended from the frame 102. Another exemplary vehicle includes a linkage 1709 that links the front 120, 121 and rear 108 anti-tip wheels, such that movement of one of the front or rear anti-tip wheel relative to the frame 102 causes movement of the other wheel relative to the frame. 132 , 102 172 104 j 120 1 1 :1 0; - 106 FIG. lB 104 106 12- 192/170 120 191 114130 184 173 134 174</p> |
