| 摘要 |
The disclosure relates to a wheel assembly (10) for a lawnmower, for example, comprising a wheel (100) and a hub (200). The hub has an aperture (203) for receiving an axle about whose axis the wheel assembly rotates in use. The hub and the wheel are configured for snap-fit engagement to form the wheel assembly. The snap-fit engagement is provided by projections (209) on the hub and by corresponding projections and recesses formed on the inside surface of the cylindrical wall (105) of the wheel. Each projection is located on a reduced-diameter section (208) of the surface of the hub, with surface sections of full diameter provided circumferentially in between. The assembly is also provided with locating means to correctly orientate the hub (200) in the wheel (100) during engagement, comprising axially extending ribs and channels. In order to facilitate insertion of the hub, orienting means are provided to guide the locating means into correct alignment. The orienting means comprises angled surfaces which form a V towards the channel and which engage the rib during engagement of the hub and wheel, causing rotation of the hub relative to the wheel until the rib and the channel are aligned. The invention allows the use of different hub configurations with a standard wheel design. The assembly of the hub and wheel is simplified by virtue of the snap-fit engagement of the hub into the wheel, avoiding the need for tools or fixings. |
