Falling protector for elevator
By introducing elastic components and ball/bead groove structure into the elevator fall-off device, the problem of excessive impact force during emergency braking of existing elevator safety pliers is solved, which improves braking stability and reduces the risk of wire rope breakage, ensuring that The safety of the elevator.
Patent Information
- Application Number
- CN202420775281.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The existing elevator safety clamps lack a buffering mechanism during emergency braking, resulting in excessive impact force, reducing braking stability and increasing the risk of wire rope breakage.
An elevator fall-off preventer is designed. By setting an elastic element between the fixed part and the movable part of the movable pliers, the elastic element is used to slow down the impact force when the elevator car falls, and a ball and a Bead grooves to reduce resistance and ensure cushioning effect.
Effectively slow down the feeling of cumulativeness when the elevator car falls, improve the stability of the braking process, avoid excessive tension on the wire rope, reduce the risk of wire rope breaking, and enhance the braking effect of the fall-proof device.
Smart Images
Figure CN222249630U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevator safety protection, in particular to a fall arrester for an elevator. Background Art
[0002] The elevator anti-fall device is a safety device designed to prevent the elevator from falling when a malfunction occurs, thereby protecting the lives of passengers. When an abnormality occurs in the elevator, such as a broken wire rope or loss of traction, the anti-fall device will quickly activate and prevent the elevator from further falling through friction or other mechanical forces.
[0003] There are many types of elevator fall arresters, among which the elevator safety clamp is one of the key safety devices in the elevator system. Its function is to stop the car urgently and clamp it on the guide rail through the operation of the speed limiter when the elevator running speed exceeds the speed limit set by the speed limiter, or when the suspension rope breaks and loosens. This process can effectively prevent the risk of falling caused by elevator failure and ensure the safety of passengers.
[0004] However, the existing safety clamp design has certain limitations. When the wedge of the safety clamp quickly clamps the guide rail to achieve emergency braking, due to the lack of a buffer mechanism, a large impact force will be generated during the braking process. This rapid and strong locking action not only reduces the stability of the braking process, but may also cause excessive tension on the elevator wire rope, thereby posing a risk of breakage. Therefore, we provide an elevator fall arrester with a buffering effect. Utility Model Content
[0005] The purpose of the utility model is to provide an elevator anti-fall device, which is used to solve the problems raised in the above background technology.
[0006] The utility model is realized by the following technical solutions:
[0007] A fall arrester for an elevator, installed between an elevator car and a guide rail, the fall arrester comprising a clamp seat fixed to the elevator car and a movable clamp block movably arranged on the clamp seat and capable of clamping on the guide rail when the elevator falls unexpectedly, the movable clamp block comprising a fixed part, a movable part slidably connected to the fixed part along the movement direction of the elevator car relative to the fixed part, and an elastic element arranged therebetween, the elastic element being constructed to be able to apply an elastic force to the movable part in the direction of the elevator car falling.
[0008] Optionally, two movable jaws are provided, the jaw seat has a mounting cavity for mounting the two movable jaws, the two movable jaws are spaced apart and symmetrically arranged in the mounting cavity, and the jaw seat is provided with a notch corresponding to the gap position between the two movable jaws.
[0009] Optionally, it also includes a fixed clamp block, which is fixed on the clamp seat, and the fixed clamp block and the movable clamp block are both wedges, and the movable clamp block is connected to the speed limiter wire rope of the elevator through a lifting mechanism.
[0010] Optionally, the lifting mechanism includes a pull rod and a connecting rod fixed at one end of the pull rod, the connecting rod is provided with a sliding hole, and the fixed part of the movable clamp is provided with a slider that can slide with the sliding hole along a direction perpendicular to the movement direction of the elevator car.
[0011] Optionally, the elastic element is a compression spring, the movable part is provided with a cylindrical connecting block, the fixed part is provided with a connecting hole which is slidably connected to the connecting block along the moving direction of the elevator car, and the compression spring is arranged in the connecting hole and pressed against the compression spring.
[0012] Optionally, balls are provided on the fixed parts located on both sides of the connecting hole, and ball grooves are provided on the movable part and arranged along the moving direction of the elevator car.
[0013] Optionally, an anti-slip structure is provided on a side of the fixing portion facing the guide rail when the fixing portion is installed.
[0014] Compared with the prior art, the utility model provides an elevator anti-fall device, which has the following beneficial effects:
[0015] The utility model arranges an elastic element between the fixed part and the movable part of the movable clamp block. When the elevator car falls unexpectedly, the movable part can move relative to the fixed part in the direction opposite to the falling direction of the elevator car under the action of friction. At this time, the impact force generated by the fall of the elevator car can act on the elastic element. The elastic element can effectively reduce the sense of frustration when the elevator car falls, improve the stability of the braking process, avoid excessive tension on the steel rope of the elevator, and reduce the risk of steel rope breakage.
[0016] The utility model can effectively reduce the resistance when relative movement occurs between the fixed part and the movable part through the arrangement of the ball and the ball groove, thereby ensuring the buffering effect when the elevator car falls;
[0017] The utility model provides an anti-skid structure on the side facing the guide rail when the fixing part is installed, and the braking effect of the fall arrester can be further ensured by the provision of the anti-skid structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;
[0020] Figure 3 It is a schematic diagram of the connection structure between the movable clamp block and the lifting mechanism of the utility model;
[0021] Figure 4 It is a schematic diagram of one axis side of the movable clamp block of the utility model after explosion;
[0022] Figure 5 It is another axial side schematic diagram of the movable clamp block of the utility model after explosion.
[0023] In the figure: 1, clamp seat; 10, mounting cavity; 11, notch; 2, movable clamp block; 20, fixed part; 200, slider; 201, connecting hole; 21, movable part; 210, connecting block; 211, anti-slip groove; 212, ball groove; 3, compression spring; 4, fixed clamp block; 5, pull rod; 6, connecting rod; 60, sliding hole; 7, ball. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0025] Example: See Figures 1 to 5 According to an embodiment of the utility model, a technical solution is provided: an elevator fall arrester, installed between the elevator car and the guide rail, the fall arrester comprises a clamp seat 1 fixed to the elevator car and a movable clamp block 2 movably arranged on the clamp seat 1 and capable of clamping on the guide rail when the elevator falls accidentally, the movable clamp block 2 comprises a fixed part 20, a movable part 21 slidably connected to the fixed part 20 along the movement direction of the elevator car relative to the fixed part 20, and an elastic element arranged therebetween, the elastic element being constructed to be able to apply an elastic force to the movable part 21 in the direction of the elevator car falling. When the elevator car falls unexpectedly, the movable clamp block 2 clamps the guide rail, and the movable part 21 of the movable clamp block 2 is in direct contact with the guide rail. Under the action of friction, the movable part 21 moves relative to the fixed part 20 in the direction opposite to the falling direction of the elevator car. At this time, the impact force generated by the fall of the elevator car can act on the elastic element, which can effectively reduce the sense of frustration when the elevator car falls, improve the stability of the braking process, avoid excessive tension on the elevator wire rope, and reduce the risk of wire rope breakage.
[0026] In this exemplary embodiment, two movable jaws 2 are provided, and the jaw seat 1 has a mounting cavity 10 for mounting the two movable jaws 2. The two movable jaws 2 are spaced apart and symmetrically arranged in the mounting cavity 10, and the jaw seat 1 is provided with a notch 11 corresponding to the gap position of the two movable jaws 2. The two movable jaws 2 and the notch 11 on the jaw seat 1 form a linear channel. When installed, the elevator slide rail is placed in the linear channel. When the elevator car falls due to an accident, the two movable jaws 2 can be clamped on the guide rail at the same time to improve the braking effect.
[0027] In this exemplary embodiment, a fixed clamp block 4 is also included. The fixed clamp block 4 is fixed on the clamp seat 1. The fixed clamp block 4 and the movable clamp block 2 are both wedges. The movable clamp block 2 is connected to the speed limiter wire rope of the elevator through a lifting mechanism. It can be understood that when the elevator running speed exceeds the rated speed, the speed limiter will trigger the action. At this time, the brake rope block of the speed limiter will apply pressure to the speed limiter wire rope to stop it from moving, and drive the movable clamp block 2 to move in the opposite direction of the elevator car falling direction through the lifting mechanism. Since the fixed clamp block 4 and the movable clamp block 2 are both wedges, the movable clamp block 2 will also move in the direction close to the guide rail at the same time, thereby achieving clamping and braking of the guide rail. Of course, as long as the movable clamp block 2 can be driven to move and finally clamped to the guide rail when the elevator car falls accidentally, there is no special restriction on the specific driving method of the movable clamp block 2.
[0028] In this exemplary embodiment, the lifting mechanism includes a pull rod 5 and a connecting rod 6 fixed at one end of the pull rod 5, a sliding hole 60 is provided on the connecting rod 6, and a slider 200 is provided on the fixed portion 20 of the movable clamp block 2, which can slide with the sliding hole 60 in a direction perpendicular to the moving direction of the elevator car. In specific implementation, the other end of the connecting rod 6 is connected to the speed limiter wire rope. When the elevator car falls accidentally, the brake rope block of the speed limiter will apply pressure to the speed limiter wire rope to stop it from moving. At this time, the speed limiter wire rope will apply a pulling force in the direction opposite to the falling direction of the elevator car to the connecting rod 6, thereby pulling the movable clamp block 2 close to and clamping it to the elevator slide rail, thereby achieving the anti-fall braking effect of the elevator. Of course, as long as the movable clamp block 2 can be pulled close to and clamped to the elevator slide rail when the elevator car falls accidentally, there is no special restriction on the specific structural form of the lifting mechanism.
[0029] In this exemplary embodiment, the elastic element is a compression spring 3, a columnar connection block 210 is provided on the movable part 21, a connection hole 201 is provided on the fixed part 20, and the connection block 210 is slidably connected to the connection hole 201 along the moving direction of the elevator car. The compression spring 3 is arranged in the connection hole 201 and presses against the compression spring 3. When the movable part 21 moves relative to the fixed part 20 in the direction opposite to the falling direction of the elevator car, the impact force generated by the falling of the elevator car can act on the compression spring 3, and the compression spring 3 is used to reduce the sense of frustration when the elevator car falls, thereby improving the stability of the braking process. Of course, as long as the elastic force in the falling direction of the elevator car can be applied to the movable part 21, there is no special restriction on the specific structural form of the elastic element.
[0030] In this exemplary embodiment, balls 7 are provided on the fixed part 20 located on both sides of the connection hole 201, and ball grooves 212 are provided on the movable part 21 along the moving direction of the elevator car. The balls 7 and the ball grooves 212 can effectively reduce the resistance when relative movement occurs between the fixed part 20 and the movable part 21, thereby ensuring the buffering effect when the elevator car falls.
[0031] In this exemplary embodiment, an anti-skid structure is provided on the side of the fixing part 20 facing the guide rail when it is installed. Specifically, the anti-skid structure can be an anti-skid pattern or anti-skid material provided on the fixing part 20. Specifically in this embodiment, the anti-skid structure is three anti-skid grooves 211 provided on the fixing part 20. By providing the anti-skid structure, the braking effect of the anti-fall device can be ensured.
[0032] Working principle: First, the clamp seat 1 of the anti-fall device is fixedly installed on the elevator car, so that the elevator slide rail is between the two movable clamp blocks 2, and the pull rod 5 of the anti-fall device is connected to the wire rope of the speed limiter. When the elevator car is operating normally, the wire rope of the speed limiter and the elevator car move synchronously. When the elevator car falls due to an accident, the speed limiter of the elevator will be triggered. At this time, the brake rope block of the speed limiter will exert pressure on the wire rope of the speed limiter to stop it from moving, and drive the movable clamp block 2 to move in the opposite direction of the elevator car falling direction through the lifting mechanism. Due to the fixed clamp block 4 and the movable The clamp blocks 2 are all wedges, so that the two movable clamp blocks 2 will move towards the direction close to the guide rail at the same time, thereby achieving clamping and braking of the guide rail. During the braking process, the movable part 21 of the movable clamp block 2 is in direct contact with the guide rail. Under the action of friction, the movable part 21 moves relative to the fixed part 20 in the direction opposite to the direction of the elevator car falling. At this time, the impact force generated by the fall of the elevator car can act on the compression spring 3. The compression spring 3 can effectively reduce the sense of frustration when the elevator car falls, improve the stability of the braking process, avoid excessive tension on the elevator wire rope, and reduce the risk of wire rope breakage.
[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An elevator anti-fall device, installed between the elevator car and the guide rail, characterized in that: The fall arrester comprises a clamp seat (1) fixed to the elevator car and a movable clamp block (2) movably arranged on the clamp seat (1) and capable of clamping the guide rail when the elevator falls accidentally, the movable clamp block (2) comprising a fixed part (20), a movable part (21) slidably connected to the fixed part (20) along the moving direction of the elevator car relative to the fixed part (20), and an elastic element arranged therebetween, the elastic element being configured to apply an elastic force to the movable part (21) in the falling direction of the elevator car.
2. The elevator anti-fall device according to claim 1, characterized in that: Two movable jaws (2) are provided, the jaw seat (1) has a mounting cavity (10) for mounting the two movable jaws (2), the two movable jaws (2) are spaced apart and symmetrically arranged in the mounting cavity (10), and the jaw seat (1) is provided with a notch (11) corresponding to the gap position between the two movable jaws (2).
3. The elevator anti-fall device according to claim 1, characterized in that: It also comprises a fixed clamp block (4), the fixed clamp block (4) being fixedly arranged on the clamp seat (1), the fixed clamp block (4) and the movable clamp block (2) being both wedges, and the movable clamp block (2) being connected to the speed limiter wire rope of the elevator via a lifting mechanism.
4. The elevator anti-fall device according to claim 3, characterized in that: The lifting mechanism comprises a pull rod (5) and a connecting rod (6) fixed to one end of the pull rod (5), the connecting rod (6) being provided with a sliding hole (60), and the fixed portion (20) of the movable clamp block (2) being provided with a sliding block (200) which can slide with the sliding hole (60) in a direction perpendicular to the moving direction of the elevator car.
5. The elevator anti-fall device according to claim 1, characterized in that: The elastic element is a compression spring (3); a columnar connection block (210) is provided on the movable portion (21); a connection hole (201) is provided on the fixed portion (20) and is slidably connected to the connection block (210) along the moving direction of the elevator car; and the compression spring (3) is arranged in the connection hole (201) and pressed against the compression spring (3).
6. The elevator anti-fall device according to claim 5, characterized in that: Balls (7) are provided on the fixed portion (20) located on both sides of the connection hole (201), and a ball groove (212) arranged along the moving direction of the elevator car is provided on the movable portion (21).
7. An elevator anti-fall device according to any one of claims 1 to 6, characterized in that: When the fixing portion (20) is installed, a side facing the guide rail is provided with an anti-slip structure.