elevator safety device

A technology of elevator safety device and guide rail, applied in the field of elevator control, can solve problems such as inability to continuously adjust, inability to apply safety devices, and increasing complexity.

Active Publication Date: 2021-03-16
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to be able to adjust smoothly in a wide range, the elastic body must be divided into multiple segments, otherwise the adjustment of the braking force can only be adjusted in a limited manner, and cannot be adjusted continuously
The segmented elastic body also increases the complexity of processing and manufacturing, and is not suitable for safety devices in the form of disc springs and coil springs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] Such as figure 2 , image 3 , Figure 4 , Figure 5 and Figure 6 As shown, the elevator safety device includes a frame 1, a brake body 2, a guide body 3, a first elastic body 4, a limit wedge 5, and an adjustment wedge 6;

[0119] The frame 1 is used to be installed on the lifting body guided by the guide rail 91 arranged in the lifting channel, and the guide rail 91 is located in the approximate middle of one side of the frame 1;

[0120] The brake body 2 is suspended on the lifting body, and is located between the guide body 3 and the guide rail 91;

[0121] The brake body 2 is wedge-shaped with a narrow top and a wide bottom. The side near the guide rail 91 is a braking vertical surface 2a, and the side far from the guide rail 91 is a braking slope 2b;

[0122] The guide body 3 is arranged in the frame 1 and can move left and right along the frame 1;

[0123] Described guide body 3, its near guide rail side is the guide slope far away from the guide rail up and...

Embodiment 2

[0144] including such as Figure 7 Figure 8 As shown, the elevator safety device includes a frame 1, a brake body 2, a guide body 3, a first elastic body 4, a fixed limit plate 51, an adjustment wedge 6, and a guide wedge 31;

[0145] The frame 1 is used to be installed on the lifting body guided by the guide rail 91 arranged in the lifting passage, and the guide rail 91 is located in the middle of one side of the frame 1;

[0146] The brake body 2 is suspended on the lifting body, and is located between the guide body 3 and the guide rail 91;

[0147] The brake body 2 is wedge-shaped with a narrow top and a wide bottom. The side near the guide rail 91 is a braking vertical surface 2a, and the side far from the guide rail 91 is a braking slope 2b;

[0148] The guide body 3 is arranged in the frame 1 and can move left and right and up and down;

[0149] Described guide body 3, its near guide rail side is the guide slope far away from the guide rail up and down, and its far ...

Embodiment 3

[0171] Such as Figure 9 , Figure 10 As shown, the elevator safety device includes a frame 1, a brake body 2, a reverse wedge 61, a guide body 3, a first elastic body 4, a second elastic body 40, a connecting plate 42, and a limiting body 43;

[0172] The frame 1 is used to be installed on the lifting body guided by the guide rail 91 arranged in the lifting passage, and the guide rail 91 is located in the middle of one side of the frame 1;

[0173] The braking body 2 is suspended on the lifting body, and is located between the reverse wedge 61 and the guide rail 91;

[0174] The brake body 2 is wedge-shaped with a narrow top and a wide bottom. The side near the guide rail 91 is a braking vertical surface 2a, and the side far from the guide rail is a braking slope 2b;

[0175] The guide body 3 is arranged in the frame 1 and can move left and right along the frame;

[0176] Described guide body 3, its near guide rail side is the guide inclined plane far away from the guide r...

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PUM

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Abstract

The invention discloses four elevator safety devices. When a lifting body descends in a speed over a specified speed due to an accident, a brake body is pressed on a guide rail, braking force is generated by relative sliding of the brake body and the guide rail, so that the lifting body is decelerated until stopping; when the braking force is increased due to the decrease of the speed and the like, positive pressure can be automatically controlled, when the braking force exceeds a specified value, the pressure of an elastic body is transmitted to a frame, and the braking force is continuouslyadjusted within a larger range; and in the braking process, when a friction coefficient increases due to the decrease of the speed, the braking force can still be automatically kept at the specified value, so that the braking deceleration speed is generally kept constant, the impact on passengers is reduced, and the risk of the accidental injury to the passengers is reduced.

Description

technical field [0001] The invention relates to elevator control technology, in particular to an elevator safety device. 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 car, as the car i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B5/22
CPCB66B5/22
Inventor 杨银国徐若育冯洋倪云浩
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD
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