| 摘要 |
A wheel assembly includes first and second wheel halves each having an outer annular rim with a valley portion and an integral wall with external and internal surfaces. Each wheel half is shaped at its center to form an opening extending through said wall, with the wall defining the opening including a flange like portion extending in a direction normal to the plane of the external surface of said integral wall. The wall defining opening functions as an annular bearing seat. A bearing includes a pair of spaced generally cylindrical flanges of a first diameter joined by a generally cylindrical intermediate portion of a diameter somewhat smaller than the first diameter. The cylindrical flanges of the bearing are supported by the walls defining each opening. First antirotation elements are affixed to the bearing and second antirotation elements are affixed to the first and second wheel halves to cooperate with the first antirotation elements for substantially preventing rotation of the bearing relative to the walls defining each opening. The first and second wheel halves are joined to form a complete wheel assembly.
|
