An elevator safety gear for emergency braking of elevators

Abstract

The invention relates to the field of elevator equipment, and discloses an elevator safety tongs used for elevator emergency braking, comprising a tong body frame and an elevator guide rail, the tong body frame is fixedly installed on the elevator car, and the elevator guide rail is located on the front of the tong body frame , the inside of the caliper frame is provided with a first brake clip and a second brake clip located on both sides of the elevator guide rail, and the top and bottom of the first brake clip and the second brake clip are both Make contact with the top of the clamp body frame. The elevator safety pliers used for emergency braking of the elevator, through the design of the first brake clip, the second brake clip, the wedge block, the limit frame and the limit block, through the action of a clamp rod, the first The brake clips and the second brake clips act at the same time to clamp the elevator guide rail for emergency braking. Under the condition that the clamp rod moves up the same distance, the first brake clip and the second brake clip are in contact with the elevator guide rail. The contact area is larger, so that the braking effect is improved.

Description

technical field [0001] The invention relates to the field of elevator equipment, in particular to an elevator safety gear used for elevator emergency braking. Background technique [0002] The safety gear is the safety protection device of the elevator. When the speed of the elevator exceeds the limit speed set by the elevator speed limiter, or when the suspension rope breaks and relaxes, it will stop the car in an emergency and clamp it on the guide rail, so as to prevent Accidents happen. [0003] The working principle of existing elevator safety gear is as follows (refer to Figure 4-5 ), when the elevator overspeeds, the pliers bar 7 moves up relative to the caliper body frame 1, and the pliers bar 7 pulls the linkage block 701 to move up, so that the first brake clip 2 and the second brake clip 3 on the front of the linkage block 701 Under the action of the wedge block 4 on the side of the first brake clip 2 and the second brake clip 3, the first brake clip 2 and the s...

AI Technical Summary

Problems solved by technology

[0004] However, during the braking process of the existing elevator safety tongs, the first brake clip 2 and the second brake clip 3 not only move up, but also move laterally under the action of the wedge 4, and the caliper rod 7 pulls The force point where the first brake clip 2 and the second brake clip 3 move up is located on the side where the first brake clip 2 and the second brake clip 3 are close to the inside, and the first brake clip 2 And the second brake clip 3 also has a force towards the front, and at the same time, the wedge block 4 is an obliquely downward force on the second brake clip 3, which makes the upward movement of the caliper rod 7 overcome the resistance. The action of emergency braking is unstable, and it is easy to cause unbalanced force on the upper and lower ends of the first brake clip 2 and the second brake clip 3, which reduces the gap between the first brake clip 2 and the elevator guide rail 8. The degree of fit affects the braking effect of the elevator safety pliers, and the first brake clip 2 and the second brake clip 3 move up to clamp the elevator guide rail 8. When the volume of the clamp body frame 1 is constant , the contact surface between the first brake clip 2 and the second brake clip 3 and the elevator guide rail 8 is small, resulting in increased braking distance and poor braking effect

Images