| 摘要 |
A bearing assembly comprises a shaft (11) journalling a gear wheel (14). The bore (15) of the gear wheel has a land portion (16) which is force fitted into an annular recess (13) in the shaft (11). To assist the force fitting step, the land has a tapered surface at one end and the shaft has a rounded edge (18). The gear wheel is composed of synthetic resin. The land may be formed in the shaft and the recess in the bore of the gear if desired. A tapered or curved surface is formed on at least one of the land portion and a part of the shaft or rotatably supported member defining the annular recess, which part is brought into contact with the raised portion upon assembly of the rotatably supporting structure. The rotatably supported member is supported at both sides of the raised portion. <IMAGE>
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