An elevator speed limiter

Abstract

The invention discloses an elevator overspeed governor. The elevator overspeed governor is characterized in that the governor comprises a rope sheave part, a rack and ratchet wheels which are fixedly connected with the rack; the rope sheave part comprises a rope sheave, a main rod arranged at the center of the rope sheave, centrifugal rods and self-locking hydraulic rods; spline shafts are fixedly welded to the two ends of the center of the rope sheave; the rope sheave is installed on the rack through a bearing, and the rope sheave and the ratchet wheels are concentric; spline grooves corresponding to the spline shafts are formed in a center hole of the main rod; the centrifugal rods are hinged to the two ends of the main rod correspondingly, the positions, located at the two sides of the center of the rope sheave, of the main rod are connected with the self-locking hydraulic rods separately, and the other end of each self-locking hydraulic rod is connected with the middle part of the corresponding centrifugal rod; the main rod is provided with a hydraulic controller, and the hydraulic controller is connected with hydraulic cylinders of the self-locking hydraulic rods; the input end of the hydraulic controller is connected with a peripheral control button in a wireless mode; and the ends, corresponding to the ratchet wheels, of the centrifugal rods are fixedly connected with ratchets.

Description

technical field [0001] The invention relates to an elevator safety device, in particular to an elevator speed governor. Background technique [0002] Existing elevator speed limiting protection devices all drive the safety gear of the braking device to act through the speed governor, so that the elevator decelerates and stops. The speed governor includes a sheave on which a wire rope connected to the elevator car is wound, so that the speed governor sheave can rotate at a speed corresponding to the speed of the car. The wire rope on the rope wheel connects the safety gear. When the rotation speed of the speed limiter sheave exceeds a certain speed, the centrifugal throwing block on the speed limiter sheave rotates with the help of the centrifugal force generated by the rotation of the sheave, driving the pressure claw and pawl on the sheave to move, so that the speed limiter The rope pressing block in the rope pressing part on the device presses the wire rope, the wire rop...

AI Technical Summary

Problems solved by technology

[0003] Existing elevator speed governors use springs to pull the centrifugal block or centrifugal rod, but the elasticity of the springs will change after repeated use or long-term placement, resulting in the ratchet not meshing with the ratchet in the event of an accident, or the sheave The centrifugal rod or centrifugal block has been released before the speed exceeds the speed;

[0004] Secondly, sometimes when the elevator needs emergency braking, people can only press the nearest button to stop. First, observe the elevator display showing the current floor, and then press the floor button below. When the elevator is running, the first floor The distance of the distance flashed by, and it was too late to observe the reading on the display screen before pressing the floor button

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