| 摘要 |
<p>A ground engaging member comprises a circular pad, preferably a pneumatic pad, adapted to be supported from a vehicle so as to present a circular surface towards the ground, the pad being tilted so that the circular surface is angled with respect to the ground whereby a lateral portion of the circumferential region of the pad contacts the ground surface to support a vehicle on which the member is fitted for motion over the ground. In one embodiment, moving means is incorporated to selectively move the pad between the tilted position and a horizontal position which provides an automatic braking facility. Steering can be incorporated by selectively varying the radial plane of the tilt angle of the pad. The invention is described with reference to its use as a ground engaging member for a helicopter undercarriage; however, it can be used on any vehicle and has particular application on vehicles required to move in any direction and in a confined space.</p> |
