| 摘要 |
<p>A manually adjustable wheel for a vehicle e.g. an agricultural tractor comprising a rim (10) to receive a tyre, the rim (10) having at least one cylindrical portion (16 or 18); a plurality of channel-shaped lugs (12) spaced apart around the radially inner surface of a said cylindrical portion (16 or 18) of the rim (10), the channel in each lug (12) extending perpendicular to the rotary axis of the wheel and receiving a pair of circumferentially spaced apart bolts (36) extending transversely across the channel and through the walls (28) thereof, each lug (17) having flanges (30) extending circumferentially of the wheel rim (10) and being attached by welding to said radially inner surface of a said cylindrical portion (16 or 18) of the rim (10); and a wheel disc (14) for connection to a hub of the vehicle, the disc (14) having substantially the shape of a square with the corners removed to provide an irregular generally octagonal shape having four longer sides and four shorter sides arranged alternately around the periphery of the octagon each shorter side being juxtaposed against a lug (12), the disc (14) and lugs (12) being arranged so that the disc (14) may be selectively secured to the lugs (12) by the bolts (36) in either of two positions, the bolts (36) being located along the shorter sides of the disc (14) only and, at each of the shorter sides comprising the pair of bolts (36) each passing through the disc (14) and through a lug (12) juxtaposed to the shorter side. <IMAGE></p> |
