| 摘要 |
<p>A load displacement apparatus (10) to displace a mobile platform (20) along a structure (22) includes a worm screw (24) mounted on the platform (20) for rotation about its axis (26) that meshes with a plurality of support blocs (28) mounted on the structure (22). The support blocs (28) are spaced apart from one another along the structure (22) to be successively engaged by the worm screw (24). Each support bloc (28) includes at least one bearing ball (34) freely movably supported therein to selectively and movably engage the worm screw (24) over at least an arc segment (33) thereof such that the worm screw (24) is always in meshing engagement with at least one of the support blocs (28). The invention also refers to a scaffolding system (12) incorporating the apparatus (10).</p> |
