| 摘要 |
The rotor is composed of four different pieces which are assembled rigidly coaxially with one another. The pinion (1) is cut together with a pivot (2), a collar (3) and a tail shaft (4). The cylindrical magnet (5) made of a sintered rare earth composition is mounted on the tail shaft (4). The adaptor (6) is formed of a pivot (7) and a disc (8). When placed on the magnet (5) its pivot is coaxial with the pivot (2). These three pieces are assembled by means of an aluminium drum (9), one end of which is stamped and crimped by its internal edge to the collar (3) whilst the other end is bent over the edge of the disc (8). <IMAGE>
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