A screw lifter

Abstract

The invention discloses a threaded rod lifter. The threaded rod lifter comprises a machine frame. A long-cylinder-shaped pipe is arranged on the machine frame. An internal thread pit slot transmission structure and a rolling guide device arranged in the long-cylinder-shaped pipe and matched with the internal thread pit slot transmission structure in a transmission manner are arranged on the inner wall of the long-cylinder-shaped pipe. The rolling guide device is connected with a lifting cylinder arranged in the long-cylinder-shaped pipe. A linear guide groove formed in the central axis direction is formed in the side portion of the long-cylinder-shaped pipe. The lifting cylinder is provided with a connection plate extending out of the linear guide groove and is fixedly connected with a lift car outside the long-cylinder-shaped pipe through the connection plate. The threaded rod lifter further comprises a transmission shaft penetrating the lifting cylinder and the rolling guide device, and a motor for driving the transmission shaft to rotate. The transmission shaft drives the rolling guide device to spirally rotate along the internal thread pit slot transmission structure and drives the lifting cylinder to linearly move along the linear guide groove at the same time. The motor is a servo motor with a power-off brake. The transmission shaft is a four-corner shaft. A lifter self-rescue device for fixedly connecting or separating and disengaging the servo motor and the transmission shaft is arranged between the servo motor and the transmission shaft.

Description

technical field [0001] The present invention relates to a lifting transmission mechanism, in particular to a screw lifting mechanism which uses a square shaft to drive a rolling guide device to spirally roll in a long cylindrical tube and drive a car to run along a straight line along the long cylindrical tube. device. Background technique [0002] In the prior art, the Chinese patent application number is 200410027840.3, the authorized announcement date is April 29, 2009, and the name is "Outer Rotor Rolling Elevator", which proposes a spiral lift elevator to replace the structure and scheme of the traditional steel wire elevator. The patent discloses that the elevating mechanism includes a guide tube, the guide tube is provided with a power lead-out groove along the axial direction, and a helical internal thread is provided inside the guide tube. The elevator with this structure uses the outer rotor motor to drive the spiral disc that matches the internal thread, and the ...

AI Technical Summary

Problems solved by technology

The screw lifter with this structure avoids the defect of huge friction in the patent of the prior art, and solves the irrational structure of the prior art and the defects that cannot be realized in application. The cooperation between the first roller and the internal thread pit transmission structure can truly realize The force point of the car and the transmission lift make the car run smoothly

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