Patent ID: 9010498
Filing Date: 2015-04-21
Classification: B66B

Abstract:
1. A screw-driven elevation structure, comprising: a first rail and a second rail parallel to each other and disposed on a fixing plane; a fixing unit for fixing the fixing plane or the first rail in place; a first screw nut assembly having a first screw and a first nut, the first screw having a top end fixedly connected to the fixing unit, and the first nut being disposed around the first screw and moving vertically along the first screw while the first nut and the first screw are rotating relative to each other; an elevator with two opposing ends having a first rail slot and a second rail slot, respectively, the first rail slot accommodating the first rail, and the second rail slot accommodating the second rail, thereby restricting the elevator to vertical movement along the first rail and the second rail; a power device disposed at the elevator and having a first driving portion and a second driving portion, the first driving portion being fixedly connected to the first nut and driving the first nut to rotate; a second screw nut assembly having a second screw and a second nut, the second screw having a top end fixedly connected to the second driving portion and being driven by the second driving portion to rotate, and the second nut being disposed around the second screw and moving vertically along the second screw while the second screw and the second nut are rotating relative to each other; and a moving body disposed between the first rail and the second rail and flanked by a third rail slot and a fourth rail slot, the third rail slot accommodating the first rail, and the fourth rail slot accommodating the second rail, thereby restricting the moving body to vertical movement along the first rail and the second rail, the moving body being fixedly connected to the second nut and moving along with the second nut, wherein the first driving portion and the second driving portion of the power device respectively drive the first nut and the second screw to rotate at a same time when the power device is started.