| 摘要 |
In a clutch arrangement for coupling together two members which move rectilinearly or rotate relative to one another, one member (10) is provided with guide means having mutually parallel guide surfaces along which a coupling element (13,14,16) is slidingly guided, with each of two gripping surfaces (15,16a), each abutting a respective guide surface (20,21) when the other of the members acts in one direction upon a lever-forming and power-transmitting part (13) of the coupling element, and is clamped firmly against the guide surfaces when the lever-forming part is acted upon in the opposite direction. The two gripping surfaces (15,16a) of the coupling element may be located on two mutually separated main components (14,16) of the coupling element which are movable relative to one another and which have a common centre of rotation (22) lying close to or in a plane passing through one guide surface (20) of the guide means. The coupling element (13,14,16) and its gripping surfaces are also so formed and arranged that the gripping surfaces have a direction of movement extending at right angles to the guide surfaces from the moment of sliding in abutment with the guide surfaces (20,21) to the moment of being firmly clamped therebetween. |
