Elevator car falling protection device

Abstract

The utility model discloses an elevator car falling protection device, which relates to the technical field of special equipment and comprises an elevator shaft, a car body, a stall sensor and a brake component, and the stall sensor is fixedly arranged in the car body. The brake assembly comprises a first hinge frame, a second hinge frame, a first brake plate, a second brake plate, a first telescopic rod and a second telescopic rod, the first hinge frame and the first telescopic rod are both fixedly connected with the elevator shaft, the second hinge frame and the second telescopic rod are both fixedly connected with the car body, and the top of the first brake plate is rotatably connected with the first hinge frame in a matched mode; and the bottom of the second brake plate is rotationally matched and connected with the second hinge frame. When the elevator car abnormally falls due to reasons, a stable braking structure is formed through mutual contact of the inclined first braking plate and the inclined second braking plate. And enough braking force is applied to the elevator car, so that rapid braking of the elevator car is realized, and people in the elevator car are prevented from danger.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of special equipment, concretely relates to elevator car falling protection device. BACKGROUND

[0002] Elevator, this indispensable vertical traffic tool in modern architecture, has penetrated into every corner of our daily life, from high-rise building to shopping mall hospital, everywhere provides the convenient up and down service for us. With the popularization of elevator use, its safety problem, is directly related to the safety of life and property of the masses.

[0003] Although the safety problem has been fully considered when designing the elevator, elevator accidents are still difficult to completely avoid, especially in the case of elevator car falling in high-rise, the traditional safety protection measures (such as the long-term use of safety tongs and other braking devices) often difficult to provide sufficient braking effect, because the elevator car does not have enough braking effect, easy to cause the personnel in the car dangerous.

[0004] Safety tongs as a passive safety device, when the elevator overspeed or falls, safety tongs can quickly clamp the guide rail, firmly fix the elevator car on the guide rail, thereby effectively preventing it from continuing to fall, protecting the life safety of passengers. However, the braking effect of safety tongs depends largely on the state of the guide rail. If the guide rail surface exists oil stain, dust or other impurities, it may affect the clamping effect of safety tongs, and even cause safety tongs to fail. The wear and deformation of guide rail may also affect the normal work of safety tongs. The long-term use of guide rail may appear wear and tear, causing the safety tongs to be unable to closely adhere to the guide rail, thereby reducing the braking effect. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the utility model provides elevator car falling protection device, and the elevator car falling protection device solves the problem that the personnel in the car are easy to be in danger because the elevator car does not have enough braking effect.

[0006] In order to achieve the above object, the elevator car falling protection device according to the first aspect of the utility model, including elevator shaft, car body, stall sensor and brake assembly, the stall sensor is fixedly arranged in the car body, the brake assembly includes first hinged frame, second hinged frame, first brake plate, second brake plate, first telescopic rod and second telescopic rod, the first hinged frame and the first telescopic rod are fixedly connected with the elevator shaft, the second hinged frame and the second telescopic rod are fixedly connected with the car body, the top of the first brake plate is rotationally and movably connected with the first hinged frame, the telescopic end of the first telescopic rod is movably connected with the bottom of the first brake plate, the bottom of the second brake plate is rotationally and movably connected with the second hinged frame, and the telescopic end of the second telescopic rod is movably connected with the top of the second brake plate.

[0007] As a further scheme of the utility model: the brake assembly further includes a first movable sliding seat, one end of the first movable sliding seat is movably connected with the bottom of the first brake plate, and the other end of the first movable sliding seat is hinged with the telescopic end of the first telescopic rod. The bottom of the first brake plate is provided with a first sliding groove, and the first movable sliding seat is movably arranged in the first sliding groove. The side of the first sliding groove is provided with a first clamping groove, and the side of the first movable sliding seat is fixedly provided with a first clamping block movably connected with the first clamping groove.

[0008] As a further scheme of the utility model: the brake assembly further includes a second movable sliding seat, one end of the second movable sliding seat is movably connected with the top of the second brake plate, and the other end of the second movable sliding seat is hinged with the telescopic end of the second telescopic rod. The top of the second brake plate is provided with a second sliding groove, and the second movable sliding seat is movably arranged in the second sliding groove. The side of the second sliding groove is provided with a second clamping groove, and the side of the second movable sliding seat is fixedly provided with a second clamping block movably connected with the second clamping groove.

[0009] As a further scheme of the utility model: the brake assembly is provided with four groups, and is arranged on the two sides of the car body in a matrix symmetry.

[0010] As a further scheme of the utility model: the first hinged frame, the first brake plate and the first telescopic rod are provided with a plurality of, and the first hinged frame and the first telescopic rod are fixedly arranged in the elevator shaft of the corresponding floor, and the first brake plate is movably connected with the corresponding first hinged frame and first telescopic rod.

[0011] As a further scheme of the utility model: the first telescopic rod and the second telescopic rod are electric telescopic rods, and are electrically connected with the stall sensor.

[0012] The utility model has the beneficial effects that compared with the prior art:

[0013] Through real-time monitoring of the stall sensor and rapid action of the brake assembly, the device can provide timely brake protection in the moment when the elevator car abnormally falls, effectively shortens the brake response time and improves the brake efficiency. When the elevator car abnormally falls due to some reasons, the first brake plate and the second brake plate are in contact with each other through the inclination, forming a stable brake structure. The brake force is applied to the elevator car, so that the rapid brake of the elevator car is realized, and the personnel in the elevator car is prevented from being in danger.

[0014] Additional aspects and advantages of the present application will be described in the following description, some of which will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0016] Figure 1 is a schematic view of the three-dimensional structure of the elevator car falling protection device.

[0017] Figure 2 is a schematic view of the structure of the brake assembly in the normal operation of the elevator.

[0018] Figure 3 is a schematic view of the structure of the brake assembly when the elevator abnormally falls.

[0019] Figure 4 is a sectional view of the structure of the first brake plate.

[0020] The reference signs include:

[0021] 1, elevator shaft; 2, car body; 3, stall sensor; 4, brake assembly; 5, first hinged frame; 6, second hinged frame; 7, first brake plate; 8, second brake plate; 9, first telescopic rod; 10, second telescopic rod; 11, first movable sliding seat; 12, second movable sliding seat; 13, first sliding groove; 14, second sliding groove; 15, first clamping groove; 16, first clamping block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0023] As Figures 1 to 4As shown, the elevator car falling protection device comprises an elevator shaft 1, a car body 2, a stall sensor 3 and a brake assembly 4. The stall sensor 3 is fixedly arranged in the car body 2 and monitors the acceleration change of the car in real time. The brake assembly 4 comprises a first hinged frame 5, a second hinged frame 6, a first brake plate 7, a second brake plate 8, a first telescopic rod 9 and a second telescopic rod 10. The first hinged frame 5 and the first telescopic rod 9 are fixedly connected with the elevator shaft 1. The second hinged frame 6 and the second telescopic rod 10 are fixedly connected with the car body 2. The top of the first brake plate 7 is rotationally and matchingly connected with the first hinged frame 5. The telescopic end of the first telescopic rod 9 is matchingly connected with the bottom of the first brake plate 7. The bottom of the second brake plate 8 is rotationally and matchingly connected with the second hinged frame 6. The telescopic end of the second telescopic rod 10 is matchingly connected with the top of the second brake plate 8. The first telescopic rod 9 and the second telescopic rod 10 are electric telescopic rods and are electrically connected with the stall sensor 3.

[0024] During the normal operation of the elevator car, the stall sensor 3 continuously monitors the acceleration change of the car to ensure the smooth operation of the elevator. The first brake plate 7 and the second brake plate 8 are kept vertical and parallel to each other and do not interfere with the normal lifting of the car in the elevator shaft 1.

[0025] Once the elevator car abnormally falls due to any reason, the stall sensor 3 can immediately detect that the running speed of the car exceeds the preset safety threshold. The first telescopic rod 9 and the second telescopic rod 10 quickly extend. The first telescopic rod 9 pushes the bottom of the first brake plate 7 to move outward, and the first hinged frame 5 is used as a rotating fulcrum to make the first brake plate 7 change to an inclined state. At the same time, the second telescopic rod 10 pushes the top of the second brake plate 8 to move outward, and the second hinged frame 6 is used as a rotating fulcrum to make the second brake plate 8 also change to an inclined state.

[0026] With the continuous falling of the elevator car, the inclined first brake plate 7 and the second brake plate 8 finally contact each other to form a stable braking structure. This structure uses the principle of friction to exert sufficient braking force on the elevator car to quickly slow down and eventually stop the car from falling, thereby effectively protecting the safety of the passengers in the car.

[0027] Through the real-time monitoring of the stall sensor 3 and the rapid action of the brake assembly 4, the device can provide timely braking protection at the moment when the elevator car abnormally falls, effectively shorten the braking response time and improve the braking efficiency. When the elevator car abnormally falls due to any reason, the inclined first brake plate 7 and the second brake plate 8 contact each other to form a stable braking structure. Sufficient braking force is exerted on the elevator car to achieve rapid braking of the elevator car and avoid danger to the personnel in the elevator car.

[0028] Reference Figure 2As shown, in some specific embodiments, the brake assembly 4 further comprises a first movable sliding seat 11, one end of which is in sliding fit connection with the bottom of the first brake plate 7, and the other end of which is hingedly connected with the telescopic end of the first telescopic rod 9. The bottom of the first brake plate 7 is provided with a first sliding groove 13, and the first movable sliding seat 11 is slidingly arranged in the first sliding groove 13. In the case of abnormal falling of the elevator car, after the stall sensor 3 detects the abnormality, the first telescopic rod 9 rapidly extends, pushes the first movable sliding seat 11 to slide along the first sliding groove 13, and drives the first brake plate 7 to tilt. The side of the first sliding groove 13 is provided with a first clamping groove 15, and the side of the first movable sliding seat 11 is fixedly provided with a first clamping block 16 in sliding fit connection with the first clamping groove 15. Through the sliding fit of the first clamping groove 15 and the first clamping block 16, the stability of the sliding of the first movable sliding seat 11 in the first sliding groove 13 can be enhanced, and the shaking of the first brake plate 7 during braking due to uneven force or external interference can be prevented.

[0029] Reference Figure 3 As shown, in some specific embodiments, the brake assembly 4 further comprises a second movable sliding seat 12, one end of which is in sliding fit connection with the top of the second brake plate 8, and the other end of which is hingedly connected with the telescopic end of the second telescopic rod 10. The top of the second brake plate 8 is provided with a second sliding groove 14, and the second movable sliding seat 12 is slidingly arranged in the second sliding groove 14. In the case of abnormal falling of the elevator car, after the stall sensor 3 detects the abnormality, the second telescopic rod 10 rapidly extends, pushes the second movable sliding seat 12 to slide along the second sliding groove 14, and drives the second brake plate 8 to tilt. The side of the second sliding groove 14 is provided with a second clamping groove, and the side of the second movable sliding seat 12 is fixedly provided with a second clamping block in sliding fit connection with the second clamping groove. Through the sliding fit of the second clamping groove and the second clamping block, the stability of the sliding of the second movable sliding seat 12 in the second sliding groove 14 can be enhanced, and the shaking of the second brake plate 8 during braking due to uneven force or external interference can be prevented.

[0030] Reference Figure 1 As shown, in some specific embodiments, the brake assembly 4 is provided in four groups and is arranged in matrix symmetry on both sides of the car body 2. Since the brake assembly 4 is arranged in matrix symmetry, the four groups of brake plates can maintain a balanced force state during tilting, avoiding brake failure or instability due to uneven force. At the same time, such symmetrical arrangement also helps to improve the uniformity and efficiency of the braking process, making the braking more stable, rapid and controllable.

[0031] In some specific embodiments, a plurality of first hinged frames 5, first brake plates 7 and first telescopic rods 9 are provided, and the first hinged frames 5 and the first telescopic rods 9 are fixedly arranged in the elevator shaft 1 of the corresponding floor, and the first brake plates 7 are respectively connected with the corresponding first hinged frames 5 and first telescopic rods 9.

[0032] The corresponding first hinged frames 5 and first telescopic rods 9 are fixedly arranged in the elevator shaft 1 of each floor or a specific floor interval. The number of these components matches the number of floors or floor intervals, ensuring comprehensive coverage of the brake system in the elevator shaft 1.

[0033] Once the elevator car falls abnormally due to any reason, the overspeed sensor 3 will immediately detect the abnormal speed and trigger the activation of the brake assembly 4. At this time, the first telescopic rod 9 of the corresponding floor or floor interval will quickly extend and push the respective first brake plate 7 to perform an inclined movement. Since the brake assembly 4 is distributed over multiple floors, they can choose the most suitable braking position according to different falling situations, thereby achieving precise braking of the elevator car.

[0034] In order to facilitate the understanding of the working principle of the embodiments of the present scheme by those skilled in the art, the working principle of the embodiments of the present scheme will be described in combination with specific application scenarios:

[0035] The overspeed sensor 3 is fixedly arranged in the car body 2 and monitors the acceleration change of the car in real time, ensuring the stability of the elevator during normal operation. When the elevator car is running normally, the first brake plate 7 and the second brake plate 8 are both kept vertical and parallel to each other, without causing any interference to the normal lifting of the car.

[0036] Once the elevator car falls abnormally due to any reason, the overspeed sensor 3 can immediately detect that the running speed of the car exceeds the preset safety threshold. At this time, the first telescopic rod 9 and the second telescopic rod 10 quickly extend and push the first brake plate 7 and the second brake plate 8 to perform an inclined movement, respectively.

[0037] The first telescopic rod 9 pushes the first movable sliding seat 11 to slide in the first sliding groove 13, and uses the first hinged frame 5 as a rotating fulcrum to make the first brake plate 7 change to an inclined state. At the same time, the second telescopic rod 10 pushes the second movable sliding seat 12 to slide in the second sliding groove 14, and uses the second hinged frame 6 as a rotating fulcrum to make the second brake plate 8 also present an inclined state. With the continuous falling of the elevator car, the inclined first brake plate 7 and the second brake plate 8 finally contact each other, forming a stable braking structure. A sufficient braking force is applied to the elevator car to quickly slow down and eventually stop the car from falling.

[0038] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. An elevator car fall protection device, characterized in that, The system includes an elevator shaft (1), a car body (2), a stall sensor (3), and a braking assembly (4). The stall sensor (3) is fixedly installed inside the car body (2). The braking assembly (4) includes a first hinge frame (5), a second hinge frame (6), a first brake plate (7), a second brake plate (8), a first telescopic rod (9), and a second telescopic rod (10). The first hinge frame (5) and the first telescopic rod (9) are both fixedly connected to the elevator shaft (1). The second hinge frame (6) and the second telescopic rod (10) are both fixedly connected to the car body (2). The top of the first brake plate (7) is rotatably connected to the first hinge frame (5). The telescopic end of the first telescopic rod (9) is connected to the bottom of the first brake plate (7). The bottom of the second brake plate (8) is rotatably connected to the second hinge frame (6). The telescopic end of the second telescopic rod (10) is connected to the top of the second brake plate (8).

2. The elevator car fall protection device according to claim 1, characterized in that, The braking assembly (4) further includes a first movable slide (11), one end of which is slidably connected to the bottom of the first brake plate (7), and the other end of which is hinged to the telescopic end of the first telescopic rod (9).

3. The elevator car fall protection device according to claim 2, characterized in that, The bottom of the first brake plate (7) is provided with a first groove (13), and the first movable slide (11) is slidably disposed in the first groove (13).

4. The elevator car fall protection device according to claim 3, characterized in that, The first slide groove (13) has a first slot (15) on its side, and the first movable slide block (11) has a first block (16) fixedly provided on its side, which is slidably connected to the first slot (15).

5. The elevator car fall protection device according to claim 1, characterized in that, The braking assembly (4) further includes a second movable slide (12), one end of which is slidably connected to the top of the second brake plate (8), and the other end of which is hinged to the telescopic end of the second telescopic rod (10).

6. The elevator car fall protection device according to claim 5, characterized in that, The top of the second brake plate (8) is provided with a second groove (14), and the second movable slide block (12) is slidably disposed in the second groove (14).

7. The elevator car fall protection device according to claim 6, characterized in that, The second slide groove (14) has a second slot on its side, and the second movable slide block (12) has a second block fixedly provided on its side that is slidably connected to the second slot.

8. The elevator car fall protection device according to claim 1, characterized in that, The braking components (4) are provided in four sets and are arranged in a matrix symmetrical arrangement on both sides of the car body (2).

9. The elevator car fall protection device according to claim 1, characterized in that, The first hinge frame (5), the first brake plate (7) and the first telescopic rod (9) are provided in several units. The first hinge frame (5) and the first telescopic rod (9) are respectively fixedly installed in the elevator shaft (1) of the corresponding floor. The first brake plate (7) is connected to the corresponding first hinge frame (5) and the first telescopic rod (9).

10. The elevator car fall protection device according to claim 1, characterized in that, The first telescopic rod (9) and the second telescopic rod (10) are both electric telescopic rods and are electrically connected to the stall sensor (3).

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