| 摘要 |
A compound bearing assembly for a swing arm is disclosed, which comprises a stepped shaft 1 having a large-diameter portion 1a and a small-diameter portion 1b, the large-diameter portion 1a having an inner raceway groove 2a directly formed in the inner periphery, a sleeve-like outer race ring 5 surrounding the stepped shaft 1 and having a distinct-member outer race ring 3 provided adjacent one end and also having an outer raceway groove directly formed in the inner periphery of a portion adjacent the outer end, a plurality of balls 4 provided between the inner raceway groove 2a directly formed in the large-diameter portion 1a and an outer raceway groove 2a formed in the distinct-member outer race ring 3, and a plurality of other balls 8a provided between an inner raceway groove formed in an inner race ring 7a fitted on the small-diameter portion 1b of the stepped shaft 1 and the outer raceway groove 2b directly formed in the inner periphery of the sleeve-like outer race ring 5.
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