| 摘要 |
FIELD: construction.SUBSTANCE: support comprises wedges installed on a fixed base and capable of mutual displacement along truncated planes, and also comprises a helical device, in the form of a support part fixed relative to the moved item with an inner threaded hole, perpendicular to direction of item movement and moving in this hole with a screw and a head, which contacts with its inner (rear) surface with the wedge installed on the fixed base, and in the wedges there are cylindrical grooves provided so that in the assembled condition the supports form a hole for axial displacement of the screw. Smoothness of item lifting level variation when using the proposed invention depends on appropriate selection of a threaded joint pitch. At the same time the finer the thread, the lower is the height of item lift per one rotation of the screw head.EFFECT: item may be lifted at any thread pitch absolutely smoothly.3 dwg |
