| 摘要 |
The coupling comprises a plate (1) mounted on the axle and provided with side arms (3a), a number of friction pieces (4) secured to the side arms, and fixing means for preventing the friction pieces moving from their positions on the arms. The fixing means comprises a first body secured to the plate and preventing movement of the friction piece in several directions, but allowing movement in one remaining direction, and a second body which can adopt a first position where it blocks movement of the friction piece in this remaining direction, or a second position where it allows movement of the friction piece in this direction. |
