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Elevator Safety Devices and Elevators

A technology of elevator safety device and wedge, which is used in transportation and packaging, lifting equipment in mines, elevators, etc., can solve problems such as heavy elevator design, accidental injury, and difficulty in safety device design.

Active Publication Date: 2021-10-08
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Excessive deceleration will not only bring discomfort to passengers, even accidental injury, but also bring difficulties to the design of safety devices. To ensure safety, car components and safety devices must be designed according to the maximum force, so that This makes the design of the elevator cumbersome and costly. At the same time, the relationship between the average deceleration and the maximum deceleration must be considered when initially adjusting the set braking force to meet the requirements of the national standard for the average deceleration. This gives the designer It has brought great difficulties. It is necessary to find a suitable setting method through a large number of experiments, which requires a lot of manpower and material resources.
[0003] In the existing safety device technology, the elastic body presses the brake body to slide on the guide rail to generate braking force, the positive pressure on the brake body is constant, but the friction coefficient changes due to the change of the speed of the car or counterweight , the braking force can only change with the
Or a complex method must be used for adjustment, such as an adjustment method disclosed in Chinese patent CN01139661.X, which adopts a hydraulic control method and has a complicated structure

Method used

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  • Elevator Safety Devices and Elevators
  • Elevator Safety Devices and Elevators
  • Elevator Safety Devices and Elevators

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Such as Figure 1 to Figure 7 As shown, the elevator safety device includes a frame 2, a brake body 5, a guide wedge 6, a first elastic body 3, an adjustment body 7, an adjustment wedge 11, a rear guide 4, a connecting body 14, and an adjustment bolt 13 ;

[0065] The frame 2 is used to be installed on the lifting body guided by the guide rail 1 arranged in the lifting passage, and the guide rail 1 is located on the front side of the frame 2;

[0066] The frame 2 includes an upper plate 21, a middle plate 22, a side plate 24 and a fixing seat 25;

[0067] The upper end of the side plate 24 is fixedly connected to the upper plate 21;

[0068] The end of the middle plate 22 is fixedly connected to the side plate 24;

[0069] The lower side of the front part of the upper plate 21 and the upper side of the front part of the middle plate 22 are correspondingly provided with grooves 26 in the left and right directions;

[0070] The fixing seat 25 is vertically fixed betwe...

Embodiment 2

[0097] Based on the elevator safety device of Embodiment 1, such as Image 6As shown, when the brake body 5 rises to a predetermined position, the contact point between the guide wedge 6 and the adjustment body 7 is located at the junction of the vertical high section 72 and the vertical transition section 73, and the first elastic body 3 is The distance of the deformation to the far side of the guide rail is D, the front and rear compression distance of the second elastic body 9 relative to the initial state is B, and a gap with a front and rear width of B is formed between the front side of the rear guide 4 and the fixed seat 25.

Embodiment 3

[0099] Based on the elevator safety device of the second embodiment, the height difference A between the vertical high section 72 and the vertical low section 74 of the adjustment body 7 is smaller than D.

[0100] Preferably, the vertical transition section 73 has a certain inclination angle, and the included angle with the vertical high section 72 and the vertical low section 74 is between 10° and 80°.

[0101] In the elevator safety device of Embodiment 3, the braking body 5 continues to rise to drive the connecting body 14 and the adjusting bolt 13 to rise together, push the support rod 15 to rise, and push the rear guide 4 and the first elastic body 3 backward through the action of the slope move, so that the adjustment body 7 moves together, the contact point between the guide wedge 6 and the adjustment body 7 changes from the vertical high section 72 to the vertical transition section 73, and the vertical transition section 73 has a certain inclination angle, due to the ...

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Abstract

The invention discloses an elevator safety device. When the braking force increases due to reasons such as a decrease in speed, and the braking force exceeds a set value, the first elastic body can be moved backward through a feedback device, thereby reducing the impact on the braking body. The pressure of the guide rail can automatically control the size of the braking force to generate a suitable braking force. The braking force can be continuously adjusted within a large range. Even if the friction coefficient increases due to the decrease of the speed during the braking process, the braking force can still be automatically adjusted. Keep it at the specified value to keep the braking deceleration roughly constant, reduce the impact on passengers, reduce the risk of accidental injury to passengers, greatly reduce the maximum force on the elevator car components, and avoid damage to the car and counterweight components. The elevator safety device has a compact and simple structure, can continuously adjust the braking force within a wide range, automatically maintain the braking force at a specified value, and keep the braking deceleration roughly constant. The invention also discloses an elevator comprising the elevator safety device.

Description

technical field [0001] The invention relates to elevator control technology, in particular to an elevator safety device and an elevator. Background technique [0002] When the elevator overspeeds due to an accident, the elevator safety device brakes the car or the counterweight. In the Chinese national standard for elevators, the average deceleration of the car or counterweight with the rated load is required to be 0.2g to 1.0g when braking. But we know that the braking force of the safety device is not constant, and the braking force is related to the friction coefficient and positive pressure. Generally, the progressive safety device applies positive pressure to the brake element through the elastic element, and the friction between the brake element and the guide rail produces a braking force, but the friction coefficient is related to the speed. Generally speaking, as the speed decreases, the friction coefficient increases. Therefore, during the braking process of the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/18B66B5/04B66B17/12
CPCB66B5/04B66B5/18B66B17/12
Inventor 杨银国徐若育冯洋倪云浩
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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