| 摘要 |
A plastic wheel assembly ( 122, 222 ) and wheel mounting sleeve ( 127, 227 ) used to releasably secure the wheel ( 122, 222 ) onto an axle ( 123, 223 ). The wheel mounting sleeve ( 127, 227 ) includes an axle stabilizing opening ( 100, 200 ) positioned in an end wall ( 158, 258 ) of the sleeve which receives an axle outer end or axle stub ( 199, 299 ) that supports the axle ( 123, 223 ) against lateral loading and stabilizes it to reduce wobble, chatter and vibration. The opening ( 100, 200 ) permits visual confirmation of proper section of the axle outer end ( 199, 299 ) in the opening ( 100, 200 ). A universal axle ( 223, 223 a) is also provided which can be used to couple wheels ( 122, 222 ) having shaped axle bores ( 139, 239 ) to the axle using wheel mounting sleeves ( 127, 227 ), as well as being used to couple wheels ( 420 ), having straight or substantially cylindrical bores ( 439 ), to the axle using conventional fasteners ( 450, 461, 470 ).
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