CN117003079A

CN117003079A - Elevator safety braking device and elevator

Info

Publication number: CN117003079A
Application number: CN202310982942.3A
Authority: CN
Inventors: 方建明; 章兢; 麻旺勇
Original assignee: Zhejiang Tichuang Digital Technology Co ltd
Current assignee: Zhejiang Tichuang Digital Technology Co ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2023-11-07

Abstract

The application discloses an elevator safety braking device and an elevator, and the application provides the following technical scheme: the elevator safety braking device comprises a detection mechanism and a parking mechanism, wherein the detection mechanism and the parking mechanism are arranged at the output end of a hoisting machine, and the detection mechanism is used for driving the parking mechanism to lock the output end exceeding a preset rotating speed. According to the elevator safety braking device and the elevator, the sensor is abandoned, the abnormal rotating speed of the output end of the elevator is detected by the mechanical structure, and when the rotating speed detected by the detecting mechanism exceeds the preset rotating speed, the parking mechanism is driven to lock the output end of the elevator, so that emergency danger avoidance is carried out.

Description

Elevator safety braking device and elevator

Technical Field

The application relates to the technical field of elevators, in particular to an elevator safety braking device and an elevator.

Background

Elevators are of great concern as a means of transportation in everyday life, as well as safety and reliability. People have a self-help experience on the safety of the elevator, and the elevator safety braking device is taken as an important component of an elevator guarantee system and plays a vital role on the safety of the elevator.

The traditional elevator braking is mostly completed by adopting an electromagnetic brake or a mechanical brake, and the basic principle is that the elevator slowly stops by resisting the ascending or descending inertia force of the elevator through electromagnetic force or a mechanical structure. However, the conventional elevator brake has limitations in terms of response speed and accuracy, and the brake has high loss and failure rate, which easily affects the safety performance of the elevator.

With the continued advancement of modern technology, hydraulic brakes and magnetic levitation brakes are new options for elevator safety braking devices. Hydraulic brakes, which utilize the force of high-pressure fluid to achieve braking, are widely used in high-speed elevators because they can rapidly provide high braking force and high accuracy. The magnetic suspension brake realizes braking by utilizing electromagnetic buoyancy, has no physical contact, and therefore has higher reliability and service life.

In addition to safety brake devices, elevators are also required to be equipped with other safety systems. For example, elevator buffer systems protect passengers by slowing down the speed of elevator motion; the car overload protector automatically stops when the elevator is overloaded, so that the elevator is prevented from falling; the electric protector is responsible for monitoring the problems of short circuit, electric leakage and the like of the circuit so as to prevent electric accidents.

In a word, the elevator safety braking device is a key technology for improving the safety performance of the elevator, and can ensure smooth, safe and reliable operation of the elevator by being matched with other safety guarantee systems. The modern high-speed elevator needs to have higher comprehensive performance in the aspects of safety, precision, speed and the like, and the adopted safety guarantee system is more and more complex and is continuously pushed and continuously improved by technical innovation.

Disclosure of Invention

The application aims to provide an elevator safety braking device and an elevator, which are used for solving the problems.

In order to achieve the above object, the present application provides the following technical solutions: the elevator safety braking device comprises a detection mechanism and a parking mechanism, wherein the detection mechanism and the parking mechanism are arranged at the output end of a hoisting machine, and the detection mechanism is used for driving the parking mechanism to lock the output end exceeding a preset rotating speed.

Preferably, the device further comprises a buffer mechanism for decelerating the output end in the atmosphere exceeding the preset rotating speed.

Preferably, the parking device further comprises a transmission shaft, and the detection mechanism, the parking mechanism and the buffer mechanism are all assembled on the transmission shaft.

Preferably, the detecting mechanism comprises a disc arranged on the transmission shaft, a mounting groove arranged in a circumferential array is formed in the disc, a resistance spring is arranged in the mounting groove, and a centrifugal block is arranged at one end of the resistance spring.

Preferably, the buffer mechanism comprises a mounting seat, a friction plate and a synchronous wheel;

the outer wall of the synchronous wheel is provided with a protruding part, the protruding part is provided with a connecting rod, the connecting rod is connected with the mounting seat, and in a default state, the minimum included angle of the connecting rod is 15 degrees;

the disc is coaxial with the synchronizing wheel and is in the same horizontal plane.

Preferably, friction lugs are arranged in the mounting seat, and the friction lugs are arranged towards one side of the friction plate.

Preferably, the parking mechanism comprises a synchronizing plate arranged adjacent to and synchronizable with the synchronizing wheel.

Preferably, the parking mechanism further comprises a base and symmetrically arranged brake flaps, one ends of the brake flaps are arranged on a rotating seat arranged on the base, and the other ends of the brake flaps are in rotating connection with the output end of an air cylinder arranged on the base;

the synchronizing plate is connected with the base.

Preferably, the brake valve is respectively provided with a first deflection piece and a second deflection piece in a rotating way, the first deflection piece is meshed with the second deflection piece, and the first deflection piece and the second deflection piece are arranged close to the axle center under the action of a torsion spring on the first deflection piece;

wherein rotation of the base centrifugally deflects the first and second deflectors to cause the cylinder passage;

the brake valve further comprises a cam arranged at the end part of the transmission shaft, and the two brake valves are arranged in a circumferential array relative to the cam.

Preferably, a damping spring is further included for maintaining a predetermined distance between the two brake flaps.

An elevator comprising an elevator safety brake device as described in the above-mentioned solution.

In the technical scheme, the elevator safety braking device and the elevator provided by the application have the following beneficial effects: the sensor is abandoned, the abnormal rotating speed of the output end of the elevator is detected by the mechanical structure, and when the rotating speed obtained by the detection mechanism exceeds the preset rotating speed, the parking mechanism is driven to lock the output end of the elevator, so that emergency danger avoidance is carried out.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

FIG. 1 is a schematic view of the overall structure provided by an embodiment of the present application;

FIG. 2 is a schematic view of an explosion structure according to an embodiment of the present application

FIG. 3 is a schematic diagram of an explosion structure of a detection mechanism and a buffer mechanism according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a disc structure according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a parking mechanism according to an embodiment of the present application.

Reference numerals illustrate:

1. a detection mechanism; 11. a disc; 12. a mounting groove; 13. a resistance spring; 14. a centrifugal block; 2. a parking mechanism; 21. a synchronizing plate; 22. a base; 221. a rotating seat; 222. a cylinder; 23. a brake valve; 231. a first deflector; 232. a second deflector; 233. a torsion spring; 3. a buffer mechanism; 31. a mounting base; 32. a friction plate; 33. a synchronizing wheel; 331. a boss; 34. a connecting rod; 331. a boss; 4. a transmission shaft; 41. a cam; 100. friction bump; 500. damping spring.

Detailed Description

In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.

As shown in fig. 1-5, an elevator safety brake device and an elevator comprise a detection mechanism 1 and a parking mechanism 2 which are arranged at the output end of a hoisting machine, wherein the detection mechanism 1 is used for driving the parking mechanism 2 to lock the output end exceeding a preset rotating speed.

The device also comprises a buffer mechanism 3, wherein the buffer mechanism 3 is used for reducing the speed of an output end in an atmosphere exceeding a preset rotating speed.

And the detection mechanism 1, the parking mechanism 2 and the buffer mechanism 3 are all assembled on the transmission shaft 4.

Specifically, in the above embodiment, when the rotation speed of the output end of the elevator exceeds the preset rotation speed, the detection mechanism 1 is driven by the output end, the buffer mechanism 3 at this time starts to provide damping for the output end, and after a few seconds, the parking mechanism 2 starts to provide locking to stop the rotation of the output end.

In the above technology, the sensor is abandoned to detect the abnormal rotation speed of the output end of the elevator by using the mechanical structure, and when the detection mechanism 1 detects that the acquired rotation speed exceeds the preset rotation speed, the parking mechanism 2 is driven to lock the output end of the elevator, so that emergency avoidance is performed.

As a further provided embodiment of the application, the detection mechanism 1 comprises a disc 11 arranged on the transmission shaft 4, the disc 11 is provided with mounting grooves 12 arranged in a circumferential array, a blocking spring 13 is arranged in the mounting groove 12, and one end of the blocking spring 13 is provided with a centrifugal block 14.

Specifically, in the embodiment, when the rotation speed of the output end of the elevator reaches a predetermined value, the centrifugal block 14 at the end of the resistance spring 13 is driven to move toward the edge of the disc 11 by the high-speed rotation of the disc, and reaches the end of the mounting groove 12.

As still another embodiment provided further by the present application, the buffer mechanism 3 includes a mount 31, a friction plate 32, and a synchronizing wheel 33;

the outer wall of the synchronizing wheel 33 is provided with a protruding part 331, the protruding part 331 is provided with a connecting rod 34, the connecting rod 34 is connected with the mounting seat 31, and in a default state, the minimum included angle of the connecting rod 34 is 15 degrees;

the disc 11 is coaxial with the synchronizing wheel 33 and is in the same horizontal plane.

Further, a friction bump 100 is disposed in the mounting seat 31, and the friction bump 100 is disposed toward the friction plate 32.

Specifically, when the rotation speed of the output end of the elevator reaches a preset value, the disc rotates at a high speed to drive the centrifugal block 14 at the end of the resistance spring 13 to move towards the edge of the disc 11 and reach the end of the mounting groove 12. At this time, the synchronizing wheel 33 is driven by the centrifugal block 14 to rotate, and as the synchronizing wheel 33 is driven, the connecting rod 34 deflects, so that the minimum included angle of the connecting rod 34 increases. The friction plate 32 at this time is brought into contact with the boss 331 and pushed so that the synchronizing wheel 33 radially moves by a predetermined length to push the friction plate 32 against the friction bump 100 to thereby exert a friction increasing effect, thereby providing a damping force to the propeller shaft 4.

As still another embodiment further provided by the present application, the parking mechanism 2 includes the synchronizing plate 21, and the synchronizing plate 21 is disposed near the synchronizing wheel 33 and can be synchronized with the synchronizing wheel 33.

Further, the parking mechanism 2 further comprises a base 22 and symmetrically arranged brake flaps 23, one end of each brake flap 23 is installed on a rotating seat 221 arranged on the base 22, and the other end of each brake flap 23 is rotationally connected with an output end of an air cylinder 222 arranged on the base 22;

the synchronization plate 21 is connected to the base 22.

Because the friction plate 32 contacts with the boss 331 and is pushed to move the synchronizing wheel 33 radially by a predetermined length to push the friction plate 32 to rub against the friction bump 100, the cylinder 222 is triggered, the output end contracts to contract the two brake flaps 23 toward the axis to hoop the cam 41 at the end of the transmission shaft 4, and the transmission shaft 4 after being lowered is locked and stopped.

As a further provided embodiment of the present application, the brake valve 23 is rotatably provided with a first deflection member 231 and a second deflection member 232, respectively, and the first deflection member 231 and the second deflection member 232 are engaged and are acted by a torsion spring 233 on the first deflection member 231, so that the first deflection member 231 and the second deflection member 232 are arranged near the axle center;

wherein rotation of the base 22 centrifugally deflects the first and second deflectors 231, 232 to allow passage of the air cylinder 222;

also included are cams 41 disposed at the ends of the drive shaft 4, with the two brake lobes 23 being disposed in a circumferential array about the cams 41.

A damper spring 200 is included, the damper spring 200 serving to maintain a predetermined distance between the two brake flaps 23.

When the fault is removed, the parts are reset under the action of the damping spring 200 and the torsion spring 233, and the original state is returned.

While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.

Claims

1. The elevator safety braking device is characterized by comprising a detection mechanism (1) and a parking mechanism (2) which are arranged at the output end of a hoisting machine, wherein the detection mechanism (1) is used for driving the parking mechanism (2) to lock the output end exceeding a preset rotating speed.

2. An elevator safety brake device according to claim 1, characterized by further comprising a buffer mechanism (3), said buffer mechanism (3) being adapted to slow down said output beyond a predetermined speed atmosphere.

3. An elevator safety brake device according to claim 1, characterized by a drive shaft (4), and by a detection mechanism (1), a parking mechanism (2) and a buffer mechanism (3) being fitted to the drive shaft (4).

4. A safety brake device for an elevator according to claim 3, characterized in that the detecting mechanism (1) comprises a disc (11) arranged on the transmission shaft (4), the disc (11) is provided with a mounting groove (12) arranged in a circumferential array, a blocking spring (13) is arranged in the mounting groove (12), and a centrifugal block (14) is arranged at one end of the blocking spring (13).

5. A safety brake arrangement of an elevator according to claim 3, characterized in that the buffer mechanism (3) comprises a mounting (31), a friction plate (32) and a synchronizing wheel (33);

the outer wall of the synchronous wheel (33) is provided with a protruding part (331), the protruding part (331) is provided with a connecting rod (34), the connecting rod (34) is connected with the mounting seat (31), and in a default state, the minimum included angle of the connecting rod (34) is 15 degrees;

the disc (11) is coaxial with the synchronizing wheel (33) and is in the same horizontal plane.

6. The elevator safety brake device according to claim 5, characterized in that a friction bump (100) is provided in the mounting seat (31), the friction bump (100) being arranged toward the friction plate (32) side.

7. An elevator safety brake device according to claim 1, characterized in that the parking mechanism (2) comprises a synchronizing plate (21), which synchronizing plate (21) is arranged close to the synchronizing wheel (33) and can be synchronized with the synchronizing wheel (33).

8. The elevator safety brake device according to claim 7, wherein the parking mechanism (2) further comprises a base (22) and symmetrically arranged brake flaps (23), one end of the brake flaps (23) is mounted on a rotating seat (221) arranged on the base (22), and the other end is rotationally connected with an output end of a cylinder (222) arranged on the base (22);

the synchronizing plate (21) is connected with the base (22).

9. The elevator safety brake device according to claim 8, wherein the brake flap (23) is rotatably provided with a first deflection member (231) and a second deflection member (232), respectively, the first deflection member (231) and the second deflection member (232) are engaged and acted by a torsion spring (233) on the first deflection member (231), so that the first deflection member (231) and the second deflection member (232) are arranged near the axle center;

wherein rotation of the base (22) centrifugally deflects the first and second deflectors (231, 232) to open the air cylinder (222);

the brake device further comprises a cam (41) arranged at the end part of the transmission shaft (4), and the two brake petals (23) are arranged in a circumferential array relative to the cam (41).

10. Elevator, characterized by comprising an elevator safety brake device according to any one of claims 1-9.