| 摘要 |
The safety coupling (10) has a first part (11) which works in conjunction with a torque and rotary movement transmitted to the coupling and a second part (12) functioning with a torque and rotary movement transmitted from the coupling. A securing unit (13) can adopt one of two adjustment positions, in the first of which torque and rotary movement can be transmitted between the two parts and a second position in which they cannot be transmitted between the two parts. - The second part has a number of axially directed tracks (12a) which enclose a hollow cylindrical part (13',13b,13b') expandable by pressure medium or a body of the securing unit or the whole or essentially the whole of the longitudinal extent of a cavity (13a). |
