The invention provides a lead screw elevator. The elevator comprises an elevator car and a lifting device, wherein the lifting device comprises a motor, a nut and a lead screw; the motor comprises a revolving shaft; the revolving shaft comprises an axial through hole; the nut is fixed in the axial through hole; a perforative axial threaded hole is arranged in the nut; an external thread is arranged on the outer wall of the lead screw; the axial threaded hole of the nut is matched and meshed with the external thread of the lead screw; the lead screw penetrates through the axial through hole; the elevator comprises a fuse nut as well; the fuse nut is fixedly and coaxially connected with the revolving shaft; the fuse nut comprises a perforative axial threaded hole; the fuse nut and the nut all comprise internal threads; the inner diameter of the internal thread of the fuse nut is smaller than the inner diameter of the internal thread of the nut and is smaller than the outer diameter of the external thread of the lead screw. Compared with the prior art, the lead screw elevator guarantees the safety of passengers or cargo in the elevator car and improves the safety standard of the lead screw elevator by adding the fuse nut.
Lead screw elevator
2015-08-26
Patent
Electronic Resource
English
IPC: | B66B Aufzüge , ELEVATORS |