CN-115783933-B - Double-control triggering anti-falling safety device

CN115783933BCN 115783933 BCN115783933 BCN 115783933BCN-115783933-B

Abstract

The invention discloses a double-control triggering anti-falling safety device, which relates to the technical field of elevator safety and comprises a shell, a brake drum, a gear shaft, a centrifugal seat, a centrifugal block, a push rod, a first trigger rod, a second trigger rod and a third trigger rod, wherein the first trigger rod is embedded in the brake drum, the second trigger rod and the third trigger rod are radially embedded in the center of the gear shaft, an elastic reset piece is further arranged on the third trigger rod, the push rod, the first trigger rod, the second trigger rod, the third trigger rod and the centrifugal block are sequentially connected in a head-to-tail contact mode, the push rod is triggered in an electric control or manual control mode to sequentially push the first trigger rod, the second trigger rod and the third trigger rod and then are transmitted to the centrifugal block until the centrifugal block is pushed to a braking position to trigger braking of the safety device, and after the safety device is braked, the elastic reset piece resets the first trigger rod, the second trigger rod and the third trigger rod. The invention realizes the electric control braking by retaining the condition that the existing safety device centrifugal block triggers the braking under the action of the rotating centrifugal force and also realizing the braking effect by an electric control or manual pushing multi-section pushing mechanism.

Inventors

MU MINGHAO
SONG DAWEN
DENG JIANGNAN
HAN WENHE
CHEN AIHUA
QIN XUETAO
LI MINGYANG
ZHOU HENG
WANG JIANJIAN
HUA JIE

Assignees

上海市建筑科学研究院科技发展有限公司

Dates

Publication Date: 20260505
Application Date: 20221206

Claims (9)

1. The double-control triggering anti-falling safety device comprises a shell (10), a gear shaft (15), a brake drum (9) and a centrifugal block (19), and is characterized in that, When the elevator provided with the anti-falling safety device stalls and falls to a certain extent, the rotating speed of the gear shaft (15) is increased, so that the centrifugal block (19) is engaged with the brake drum (9) under the action of centrifugal force and drives the brake drum (9) to rotate, the brake drum (9) approaches and contacts the shell (10) to generate a braking effect, The anti-falling safety device further comprises a push rod arranged at the rear cover (1) of the shell (10), a first trigger rod (12) is embedded in the brake drum (9), a second trigger rod (16) and a third trigger rod (18) are respectively embedded in the gear shaft (15) along the vertical central axis and the radial direction of the gear shaft, and an elastic reset piece is further arranged on the third trigger rod (18), wherein: The push rod, the first trigger rod (12), the second trigger rod (16), the third trigger rod (18) and the centrifugal block (19) are connected in a head-to-tail contact mode in sequence, the first trigger rod (12), the second trigger rod (16) and the third trigger rod (18) are triggered by an electric control mode or a manual control mode to push the first trigger rod, the second trigger rod and the third trigger rod to the centrifugal block (19) in sequence until the centrifugal block (19) is pushed to a braking position so as to trigger the braking of the safety device; after the safety device is braked, the elastic reset piece resets the trigger rod I (12), the trigger rod II (16) and the trigger rod III (18).
2. The double-control triggering safety catch according to claim 1, wherein the manner of electrically controlling the push rod is realized by an electric control device (3), and the push rod is connected to the driving end of the electric control device (3).
3. The double-control triggered safety catch according to claim 2, characterized in that the triggering pushing function of the electric control device (3) is realized by an electromagnet.
4. The double-control triggered safety catch according to claim 2, characterized in that the triggering pushing function of the electric control device (3) is realized by an electric cylinder.
5. The dual-control triggered safety brake of claim 1, wherein triggering the push rod pushing function is also accomplished with a spring.
6. The dual-control triggered safety brake of claim 1, wherein triggering the push rod pushing function is also achieved with an air cylinder.
7. The double-control triggering safety catch according to claim 1, wherein the push rod is manually controlled by arranging a manual push switch at one end of the push rod far away from the first triggering rod (12), and the operating end of the manual push switch is positioned outside the rear cover (1) of the shell (10).
8. A dual-control triggering safety catch according to claim 2 or 3, characterized in that the elastic restoring element is connected to one end of the third triggering lever (18) close to the centrifugal block (19), the elastic restoring element mainly comprises a jacking spring (20) and a spring baffle (17), and the jacking spring (20) is used for positioning the third triggering lever (18) and returning the first triggering lever (12), the second triggering lever (16) and the third triggering lever (18) to the original positions under the action of the jacking force.
9. The double-control triggered safety brake device according to claim 8, characterized in that the number of centrifugal blocks (19) is one, two or more.

Description

Double-control triggering anti-falling safety device Technical Field The invention relates to the technical field of elevator safety, in particular to a double-control triggering anti-falling safety device. Background The anti-falling safety device is the most important safety device in the construction elevator, and along with the development of the construction machinery technology, a user also puts forward higher requirements on the anti-falling safety device. The patent of the utility model of China, publication No. CN 205739867U, discloses a fall arrester and fall arrester assembly, comprising a shell, a brake drum accommodated in the shell, an end cover connected at one end of the shell, wherein the fall arrester further comprises a connecting gear, the connecting gear comprises a main shaft and a gear, a first end of the main shaft is supported by an inner hole of the brake drum, a second end of the main shaft is supported by a central hole of the end cover, the gear is arranged at the second end of the main shaft, a centrifugal seat and a centrifugal block are arranged between the first end and the second end of the main shaft, the end cover is provided with an outer side face facing the gear and an inner side face facing the centrifugal seat, an outer annular counter bore is arranged on the outer side face of the end cover, and an outer end face bearing is arranged in the outer annular counter bore. The anti-falling safety device is simple in structure, good in sealing, reliable in positioning and easy to maintain. However, the anti-falling safety device in the technical scheme can only simply realize mechanical braking, and has a narrow application range, and based on the anti-falling safety device, the anti-falling safety device triggered by double control is designed to solve the problems. Disclosure of Invention The invention aims to solve the defects in the prior art, and provides the double-control triggering anti-falling safety device which is simple in structure, stable and reliable, and can automatically control and actively trigger braking through external power on the basis of keeping the mechanical braking of the existing safety device, wherein the external power can be electric, starting, spring force or manual thrust. In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a two anti-falling safety devices that control triggered, includes casing, brake drum and centrifugal piece, still including setting up in the push rod of casing back lid department, the brake drum is embedded to have a trigger lever one, the tooth axle is embedded respectively along its vertical central axis, radial trigger lever two, trigger lever three, still is equipped with the elasticity piece that resets on the trigger lever three, wherein: The push rod, the first trigger rod, the second trigger rod, the third trigger rod and the centrifugal block are sequentially connected in an end-to-end contact mode, the push rod is triggered in an electric control or manual control mode to sequentially push the first trigger rod, the second trigger rod and the third trigger rod and transmit the first trigger rod, the second trigger rod and the third trigger rod to the centrifugal block until the centrifugal block is pushed to a braking position so as to trigger braking of the safety device; After the safety device is braked, the elastic reset piece resets the first trigger rod, the second trigger rod and the third trigger rod. Further, the mode of electrically controlling the push rod is realized by adopting an electric control device, and the push rod is connected to the driving end of the electric control device. Furthermore, the triggering and pushing functions of the electric control device are realized by adopting electromagnets. Furthermore, the triggering and pushing functions of the electric control device are realized by adopting an electric cylinder. Furthermore, the triggering of the push rod pushing function is realized by a spring. Further, the triggering of the push rod pushing function is realized by adopting an air cylinder. Further, the manual control mode of the push rod is that a manual push switch is arranged at one end, far away from the first trigger rod, of the push rod, and the operating end of the manual push switch is located outside the rear cover of the shell. Further, the elastic reset piece is connected to one end of the trigger rod III, which is close to the centrifugal block, and the elastic reset piece mainly comprises a jacking spring and a spring baffle, wherein the jacking spring is used for positioning the trigger rod III and returning the trigger rod I, the trigger rod II and the trigger rod III to the original positions under the action of jacking force after braking. Further, the number of the centrifugal blocks is one, two or more. Compared with the prior art, the invention has the beneficial effects that: The