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Asymmetric safety tongs and elevator

A safety gear, asymmetric technology, used in elevators, transportation and packaging, etc., can solve the problems of safety gear failure, wedge stuck and unable to move, etc.

Active Publication Date: 2022-03-01
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to realize the movement of the wedge in the safety gear, it is necessary to leave a gap in the slideway where the wedge is in contact with the clamp body, and the slideway is an open structure, which is very easy to be polluted by dust and other substances. The left and right wedges tilt and move, causing the wedges to be stuck and unable to move, the safety gear cannot move, and the safety gear has the risk of failure

Method used

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  • Asymmetric safety tongs and elevator
  • Asymmetric safety tongs and elevator
  • Asymmetric safety tongs and elevator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] like Figure 1~3 As shown, the asymmetrical safety tongs includes a tong body assembly, an upper guide groove 5, a lower guide groove 6 and a spring return structure;

[0058] The pliers body assembly includes a pliers body 2, a fixed wedge 30, a sliding wedge 3, a friction block 4, a disc spring 15, an upper guide post 8 and a lower guide post 9;

[0059] The pliers body 2 is a rectangular frame whose rear ends are connected and fixed together, and guide rail passing gaps are respectively formed in the middle of the front side of the upper frame wall and the lower frame wall for the guide rail to pass through;

[0060] A fixed wedge 30, a sliding wedge 3 and a friction block 4 are arranged in the rectangular frame of the pliers body 2;

[0061] The fixed wedge 30 is fixedly connected to the right frame wall of the pliers body 2;

[0062] The left inclined surface of the fixed wedge 30 is inclined from upper left to lower right;

[0063] The right slope of the slidin...

Embodiment 2

[0080] Based on the asymmetrical safety tongs of Embodiment 1, a friction plate 7 is fixed on the upper side of the upper frame wall of the tong body 2;

[0081] In the natural state, the pliers body assembly is subjected to gravity, the lower frame wall of the pliers body 2 is in direct contact with the lower guide groove 6, there is a gap of a set distance h between the friction plate 7 and the upper guide groove 5, and the upper guide column 8. The left and right guide ribs on the top have a gap greater than the set distance h on the left and right chute upper sides of the upper guide groove 5.

[0082] Preferably, an upper guide post 8 is fixedly connected to both sides of the gap on the upper frame wall of the pliers body 2;

[0083] Friction plates 7 are respectively fixed on both sides of the gap on the upper frame wall of the pliers body 2 .

[0084] Preferably, the set distance h is 0.1mm˜5mm.

[0085] In the asymmetrical safety tongs of Embodiment 2, when the eleva...

Embodiment 3

[0089] Based on the asymmetrical safety tongs of Embodiment 1, the horizontal guide ribs at the upper end of the friction block 4 are embedded in the left and right sliding grooves formed on the lower side of the right part of the gap on the upper frame wall of the pliers body 2, and the lateral guide ribs at the lower end The tendons are embedded in the left and right chute formed on the upper side of the notch right part of the lower frame wall of the pliers body 2 .

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Abstract

After a speed governor triggers the safety tongs to act, a sliding wedge block of the safety tongs is attached to the front-back vertical face of a guide rail, and when the sliding wedge block and a friction block of the safety tongs clamp the front-back vertical face of the guide rail, a tongs body, an upper guide column, a lower guide column and other tongs body assemblies of the safety tongs can move horizontally in a self-adaptive mode; the vertical column is not subjected to transverse force caused by action of the safety tongs, it can be effectively guaranteed that the center of the vertical column does not deviate relative to the guide rail, then the guide shoe is not subjected to transverse load caused by action of the safety tongs, compression deformation damage of the guide shoe is reduced, the service life of the guide shoe is prolonged, and the action reliability of the safety tongs is improved. The invention further discloses an elevator.

Description

technical field [0001] The invention relates to an elevator safety device, in particular to an asymmetrical safety gear and an elevator which can prevent the elevator or the counterweight from moving laterally when the elevator car or the counterweight is stopped. Background technique [0002] Safety gear is an indispensable part in elevator design and one of the core components to ensure elevator safety. Generally, safety gear refers to one-way safety gear, which is installed on the elevator car or counterweight, and is connected to the elevator car frame or counterweight. Heavy frame fastening. Safety gear generally consists of a clamp body, a movable wedge (or roller), a fixed wedge, a reset piece and other fasteners. A longitudinal passage is left between the two wedges so that the guide rail passes along the passage, and the clamping surfaces of the two wedges keep a certain distance from the guide rail to ensure that the elevator can pass through smoothly when it is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B5/18B66B5/22
CPCB66B5/18B66B5/22
Inventor 孙春双周大朝朱维良刘宗亮
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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