| 摘要 |
The drive device has a cam disc (18) which can be driven in a pulsed manner in a rotational direction (D) by means of an energy store in order to connect the power circuit breaker. An intermediate section (50) having a continuously reducing radius is adjacent to a first section (48) of the cam track (20) of the cam disc (18), in which first section (48) the radius increases as the azimuth angle increases counter to the rotational direction (D). This intermediate section (50) is followed by a second section (52) which runs approximately in the radial direction. As a result of the interaction of the first section (48) with the roller (22'), the triangular lever (76) is moved, together with the switching shaft (26), counter to the rotation direction (D) from the disconnected position into the connected position, and through an excess travel (U) beyond this point. When the intermediate section (50) moves past the roller (22'), the triangular lever (76) moves slowly back in the rotational direction (D) as a result of the force of the disconnection spring, which is now stressed, until its latching tab (78) rests against the connection latch (72). This slow backward movement results in the impact forces which act on the latch (34) being greatly reduced. <IMAGE> |
