| 摘要 |
A shaft coupling unit is disclosed, which comprises a coupling disk ( 1 ), a disk ( 2 ), a spring ( 3 ), a concave member ( 4 ), a convex member ( 5 ) and a draw lever ( 14 ). The concave member ( 4 ) is press fitted against the convex member ( 5 ) to rotate circumferentially and to move axially with respect to one another. The concave member ( 4 ) is axially press fitted against the disk ( 2 ) to rotate circumferentially with respect to one another. An external coupling member ( 6 ) is disposed between the concave member ( 4 ) and a transmission member ( 7 ). The external coupling member ( 6 ) is radially press fitted against the concave member ( 4 ) to axially slide each other. The convex member ( 5 ) is mounted on the coupling disk ( 1 ). The spring ( 3 ) is joined to the disk ( 2 ) at an end, and joined to the draw lever ( 14 ) at the other end. The draw lever ( 14 ) is linked up with the coupling member ( 1 ) through the disk ( 2 ). The coupling disk ( 1 ) is mounted on an external transmission shaft ( 8 ), or attached to the latter through a shaft joining member ( 9 ) so as to form the shaft coupling unit of the invention for coupling the transmission member ( 7 ) with the external transmission shaft ( 8 ).
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