Bi-directional safety tongs

Abstract

The invention relates to a pair of bi-directional safety tongs. The bi-directional safety tongs comprises a support with a guide rail groove, a flat tongs body, a wedged tongs body assembly and a double-wedge block, wherein the flat tongs body and the wedged tongs body assembly are installed on the two sides of the guide rail groove of the support respectively, the double-wedge block is installed on the support in a sliding manner and used in cooperation with the wedged tongs body assembly. The wedged tongs body assembly comprises an upper wedged tongs body and a lower wedged tongs body, wherein the upper wedged tongs body and the lower wedged tongs body are symmetrically arranged. Correspondingly, the double-wedge block is provided with two guide wedge surfaces, wherein one guide wedge surface is matched with the upper wedged tongs body, and the other guide wedge surface is matched with the lower wedged tongs body. The upper wedged tongs body and the lower wedged tongs body are connected through a linkage rod. The flat tongs body is provided with two clamp wedge surfaces which are symmetrically arranged, and is rotationally connected with the support through a pivot. One wedged tongs body is connected with the pivot through a transmission mechanism, and the wedged tongs body slides to drive the flat tongs body to rotate when braking is carried out, so that the clamp wedge surfaces are closely attached to a guide rail. The support is further provided with a reset mechanism for acting on the wedged tongs bodies and acting on the pivot through the transmission mechanism. According to the bi-directional safety tongs, two-directional braking is achieved, the guide rail is protected to the maximum degree, and meanwhile, a lift car is more comfortable for passengers when the safety tongs move.

Description

technical field [0001] The invention relates to the field of safety gear for elevators, in particular to a two-way safety gear. Background technique [0002] Conventional safety gears currently on the market are installed on the elevator car or the counterweight, and are provided with guide rail grooves in the longitudinal direction, and wedge blocks are provided on one or both sides. When the elevator car is in normal running state, keep a certain distance between the wedge and the guide rail. [0003] When the upward or downward speed of the car reaches a certain upper limit speed, the speed limiter pulls the speed limiter rope, and the speed limiter rope drives the lifting mechanism of the safety gear, and the lifting mechanism pulls the movable wedge upward or downward to make the movable wedge move The gap between the wedge and the guide rail disappears, and friction is generated after the movable wedge contacts the guide rail to continue to drive the movable wedge to ...

AI Technical Summary

Problems solved by technology

[0004] Although the safety gear in the prior art can prevent the lateral displacement of the car or the deformation of the guide rail when the safety gear is working, it cannot realize bidirectional braking at the same time. In actual use, multiple safety gears in different directions need to be installed, which not only takes up space but complex structure

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