Progressive elevator safety tongs

Abstract

The invention discloses progressive elevator safety tongs, and belongs to the field of elevator accessories. The progressive elevator safety tongs comprise a supporting frame, supporting plates, U-shaped plate springs, guide blocks, positioning pins and limiting blocks, wherein the supporting plates are positioned on the inner side of the supporting frame, the U-shaped plate springs are positionedin the supporting frame and correspond to the upper parts of the supporting plates, the guide blocks are symmetrically installed on the inner sides of the U-shaped plate springs, the positioning pinsare used for fixing the U-shaped plate springs and the guide blocks to the supporting frame, and the limiting blocks are used for limiting the movement of the U-shaped plate springs. The positioningpins sequentially penetrate through the supporting frame and the U-shaped plate springs and are fixedly connected with guide rails, first through holes and second through holes for the positioning pins to penetrate through are formed in the positions, corresponding to the positioning pins, of the supporting frame and the U-shaped plate springs respectively, and the diameters of the first through holes and the second through holes are at least larger than those of fixed pins; a jaw is formed in the supporting frame; and at least two fixed pins are arranged between the guide rails and the supporting frame. The elevator safety tongs are simple and stable in structure, the stability of the installation positions of the plate springs can be effectively kept, the deformation risk of the positioning pins is reduced, and the elevator safety tongs is safe to use.

Description

technical field [0001] The invention belongs to the technical field of progressive elevator safety gear, and in particular relates to a progressive elevator safety gear. Background technique [0002] The safety gear is the safety protection device of the elevator. When the elevator exceeds the limit speed set by the elevator speed limiter or the suspension rope breaks and relaxes, the safety gear will stop the air intake of the car under the control of the speed limiter and stop it. A safety device clamped on a rail. It provides effective protection for the safe operation of the elevator. [0003] Such as Figure 4 and Figure 5 As shown, the traditional progressive elevator safety gear includes a support frame 1', a support plate 2' located inside the support frame 1', a U-shaped leaf spring 3' located above the corresponding support plate 2' inside the support frame 1', symmetrical The guide block 6' installed on the inner side of the U-shaped leaf spring 3' and the wed...

AI Technical Summary

Problems solved by technology

[0005] However, when the elevator is decelerated or stopped, the wedge moves and clamps on the guide rail of the car, and the instantaneous force impact is too large, which will cause the U-shaped leaf spring to rotate due to inertia, and at the same time impact the fixed pin, resulting in deformation and damage to the fixed pin , so that the U-shaped leaf spring moves up or down, and the installation position of the U-shaped leaf spring changes, which will easily lead to changes in the clamping force output by the leaf spring and affect the safety of use.

Images