| 摘要 |
<p>The load-shifting mechanism has two or more clamps moved to and from each other by an actuator along a guide such as a rope, one gripping the guide while the other is released from and moves along it. The actuator mechanism comprises two rams (17, 18), acting respectively via first and second levers (19, 20) on the two clamps (1, 2). The two levers can be coupled to each other via a spring component (21). The rams can be single-acting, and the levers double-armed. The spring component can be a spring-loaded lever pivoting on the first lever and coupled to the second one, bearing against one of the arms of the latter.</p> |
