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Gradual safety tongs

A safety gear, a progressive technology, applied in the direction of elevators, transportation and packaging, etc., can solve the problems of increased stopping time, safety accidents, multiple stopping times, etc., and achieve the effect of ensuring stability and timeliness

Active Publication Date: 2019-05-17
HENGDA FUJI ELEVATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the progressive safety gear requires more braking time than the instantaneous safety gear, and even the aging of some components greatly increases the braking time, which is easy to cause safety accidents in some situations

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A progressive safety tongs, comprising a main body 1, tong arms 2 arranged on both sides of the main body 1, a balance spring connecting the rear ends of the two tong arms 2, and a main tong arranged at the front end of the tong arms 2 Block 3, the auxiliary tong block 4 that is slidably connected to the main tong block 3, the joystick 5 that is located at the upper end of the auxiliary tong block 4, the bottom of the main tong block 3 is provided with a locking mechanism, and the locking mechanism It includes a telescopic opening on the side of the main tong block 3 that fits the auxiliary tong block 4, an accommodating cavity that is located in the main tong block 3 and communicates with the telescopic opening, and is located in the accommodating cavity. A lock block 61 and a spring 62 placed in the cavity; at least two opposite side walls in the accommodating cavity are provided with a one-way limiting groove 63, and the lock block 61 is provided with a telescopic Li...

Embodiment 2

[0023] On the basis of Embodiment 1, the side wall of the one-way limiting groove 63 close to the telescopic opening is an arc surface, and the side wall away from the telescopic opening is a vertical surface, and the telescopic limiting tongue has Adapt to the shape of the one-way limiting groove 63 . The structure ensures the one-way limit of the telescopic limit tongue, that is, the one-way limit of the lock block, preventing it from retracting into the accommodating cavity, so as to ensure the reliability of braking. The lower parts of the opposite sides of the two main tong blocks 3 are integrally formed with accommodating blocks 7, the accommodating blocks 6 are connected to the lower side of the tong arm 2, and the accommodating blocks 7 are provided with the accommodating blocks 7. cavity. The structure is simple and reasonable, and at the same time has high stability. The surface of the auxiliary jaw block 4 and the main jaw block 3 is an inclined surface, and the v...

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Abstract

The invention relates to gradual safety tongs, and belongs to the technical field of towing lifts. The gradual safety tongs comprise a main body part, tong arms located on two sides of the main body part, a balance spring which is connected with the rear ends of the two tong arms, main tong blocks each of which is located at the front end of the corresponding tong arm, auxiliary tong blocks each of which is in sliding connection to the corresponding main tong block, and control rods each of which is located at the upper end of the corresponding auxiliary tong block, wherein a locking mechanismis arranged at the lower part of each main tong block, and comprises an expanding and contracting opening which is located on the corresponding main tong block and is jointed with the side surface ofthe corresponding auxiliary plier block, an accommodating cavity which is located in the corresponding main tong block and communicates with the corresponding expanding and contracting opening, a locking block which is located in the corresponding accommodating cavity and a spring which is located in the corresponding accommodating cavity; one-way limiting grooves are formed in at least two opposite side walls in each accommodating cavity; and an expanding and contracting limiting bolt which cooperates with a corresponding positioning groove is arranged in each locking block. Through the adoption of the gradual safety tongs disclosed by the invention, the stability and the timeliness of braking and stopping of a lift cage can be guaranteed at the same time.

Description

technical field [0001] The invention relates to the technical field of traction elevators, in particular to a progressive safety gear. Background technique [0002] Safety gear is an important safety component of elevator equipment, which can play an important role in safety when the elevator is overspeed and out of control. The action of the safety gear device is to make the rope clamp clamp the speed limiter rope through the action of the speed limiter. As the car runs downward, the speed limiter rope pulls the safety gear linkage mechanism, and the safety gear linkage mechanism moves to drive The braking element of the safety gear is in contact with the guide rail, so that the safety gear on both sides of the guide rail is clamped on the guide rail at the same time, so that the car is stopped. [0003] According to regulations, if the rated speed of the elevator is greater than 0.63m / s, progressive safety gear should be used to ensure the stability and safety of the car'...

Claims

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Application Information

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IPC IPC(8): B66B5/22
Inventor 雷猛陈锋朱洪兴
Owner HENGDA FUJI ELEVATOR
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