A combination safety tong
By using a combined safety clamp design, multiple safety clamp components and linkage plates are used to achieve synchronous braking, which solves the problems of insufficient braking capacity and deviation in large-tonnage elevators, and achieves better braking effect and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENGDA FUJI ELEVATOR
- Filing Date
- 2025-05-19
- Publication Date
- 2026-06-16
AI Technical Summary
Existing elevator safety brakes have insufficient braking capacity in large-tonnage elevators and are prone to braking deviation, resulting in uneven deceleration and affecting the safety experience.
The system employs a combined safety clamp, which consists of multiple horizontally distributed safety clamp components connected by a linkage plate to achieve synchronous braking. The combination of guide wedges and damping layers enhances braking force and synchronicity.
It achieves sufficient braking force and smooth deceleration for large-tonnage elevators, thus improving the safety performance of elevators.
Smart Images
Figure CN224362340U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a safety clamp, and more particularly to a combined safety clamp. Background Technology
[0002] The elevator safety brake is a crucial safety protection device in an elevator system. Existing safety brakes feature movable lifting plates on both sides of the guide rails. Above these lifting plates is a lifting mechanism connected to the steel cable of the speed governor. The lever of the lifting mechanism is connected to the lifting plates. During normal elevator operation, the two lifting plates do not contact the guide rails, allowing the elevator to move freely up and down. When the elevator's speed exceeds the rated value, the speed governor stops rotating, and the steel cable on the speed governor also stops rotating. This causes the lever of the lifting mechanism to pull the lifting plates closer together, clamping them against the guide rails, thus slowing down or stopping the elevator and improving its safety.
[0003] For large-tonnage elevators, using a single safety clamp is insufficient in braking capacity and has a weak braking effect. Using multiple safety clamps can easily cause the braking actions of the multiple safety clamps to be out of sync, resulting in braking deviation. The elevator deceleration is not smooth enough, and the safety experience is poor. Utility Model Content
[0004] The purpose of this invention is to provide a combined safety clamp. This invention features sufficient braking force and synchronized braking.
[0005] The technical solution of this utility model is as follows: A combined safety clamp includes several safety clamp assemblies arranged in parallel in a horizontal direction. Each safety clamp assembly is provided with a first lifting plate and a second lifting plate located on both sides of a guide rail. A linkage plate is provided between each pair of adjacent safety clamp assemblies. One end of the linkage plate is hinged to the first lifting plate of one of the safety clamp assemblies, and the other end of the linkage plate is hinged to the second lifting plate of another safety clamp assembly, thereby driving multiple safety clamp assemblies to brake synchronously.
[0006] In the aforementioned combined safety clamp, the safety clamp assembly includes multiple clamp seats stacked vertically along the guide rail direction. Each clamp seat is provided with a pair of guide wedges, and a guide groove is formed between each guide wedge and the clamp seat. The first lifting plate and the second lifting plate extend and are movably connected in the guide grooves corresponding to all clamp seats.
[0007] In the aforementioned combined safety clamp, multiple linkage plates are distributed along the guide rail direction on the first and second lifting plates, and each linkage plate corresponds to the clamp seat.
[0008] In the aforementioned combined safety clamp, the clamp seat includes a main board, a top plate at the top of the main board, and a bottom plate at the bottom of the main board. The top plate of the lower clamp seat is connected to the bottom plate of the upper clamp seat. Both the top plate and the bottom plate are provided with through slots for the first lifting plate and the second lifting plate to pass through.
[0009] In the aforementioned combined safety clamp, a return spring is provided between the bottom of the first and second lifting plates and the bottom plate of the lowest clamp seat.
[0010] In the aforementioned combined safety clamp, each clamp base plate is equipped with a proximity sensor or pressure sensor corresponding to the linkage plate.
[0011] In the aforementioned combined safety clamp, the first and second lifting plates are provided with a damping layer on the side near the guide rail. The surface of the damping layer has a serrated structure. The guide wedge is provided with a groove on the side facing the guide rail. A rolling column with a protruding groove and in contact with the first or second lifting plate is rolled in the groove.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] This invention employs multiple safety clamp assemblies in the horizontal direction, in conjunction with multiple guide rails. By lifting the first and second lifting plates, the guide rails are clamped from both sides for braking, thus evenly distributing the elevator load. Adjacent safety clamp assemblies are linked by a linkage plate connecting adjacent lifting plates to achieve linkage. The first and second lifting plates on multiple safety clamp assemblies move simultaneously, producing a synchronous and uniform braking effect, resulting in sufficient braking force and better deceleration. This allows the car to decelerate smoothly, resulting in relatively good car safety performance, making it suitable for large-tonnage elevators.
[0014] Therefore, this utility model has the characteristics of sufficient braking force and synchronized braking. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model.
[0016] Figure 2 This is a schematic diagram of the connection structure between the first lifting plate and the bottom clamp seat.
[0017] Figure 3 This is a schematic diagram of the guide wedge block.
[0018] The labels in the attached diagram are as follows: 1. Safety clamp assembly; 11. First lifting plate; 12. Second lifting plate; 121. Return spring; 122. Damping layer; 13. Clamp seat; 131. Main board; 132. Top plate; 133. Bottom plate; 14. Guide wedge; 141. Groove; 142. Rolling column; 15. Proximity sensor; 2. Guide rail; 3. Linkage plate. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.
[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, a hinged connection, a rotating connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0021] Example:
[0022] like Figures 1-3 As shown, a combined safety clamp includes several safety clamp assemblies 1 arranged in parallel in a horizontal direction. Each safety clamp assembly 1 is provided with a first lifting plate 11 and a second lifting plate 12 located on both sides of a guide rail 2. A linkage plate 3 is provided between each two adjacent safety clamp assemblies 1. One end of the linkage plate 3 is hinged to the first lifting plate 11 of one of the safety clamp assemblies 1, and the other end of the linkage plate 3 is hinged to the second lifting plate 12 of another safety clamp assembly 1, thereby driving multiple safety clamp assemblies 1 to brake synchronously.
[0023] This invention employs multiple safety clamp assemblies 1 in the horizontal direction, in conjunction with multiple guide rails 2. By pulling the first lifting plate 11 and the second lifting plate 12, the elevator load is evenly distributed by clamping the guide rails 2 from both sides. Adjacent safety clamp assemblies 1 are linked by a linkage plate 3 to connect adjacent lifting plates, enabling simultaneous action of the first lifting plate 11 and the second lifting plate 12 on multiple safety clamp assemblies 1. This results in a synchronized and uniform braking effect, providing sufficient braking force and better deceleration. This allows the car to decelerate smoothly, resulting in relatively good car safety performance, making it suitable for large-tonnage elevators.
[0024] The safety clamp assembly 1 includes multiple clamp seats 13 stacked vertically along the guide rail 2. Each clamp seat 13 is provided with a pair of guide wedges 14. Each guide wedge 14 forms a guide groove with the clamp seat 13. The first lifting plate 11 and the second lifting plate 12 of each safety clamp assembly 1 extend and are movably connected in the guide grooves corresponding to all clamp seats 13.
[0025] This application also provides multiple clamp seats 13 in the vertical direction. The upper and lower clamp seats 13 are braked only by a pair of first lifting plates 11 and second lifting plates 12, which further distributes the elevator load evenly. While expanding the braking area and improving the braking capacity, the structure is simplified and the cost is saved.
[0026] Multiple linkage plates 3 are distributed along the guide rail 2 on the first lifting plate 11 and the second lifting plate 12, and each linkage plate 3 corresponds to the clamp seat 13. Multiple linkage plates 3 enhance the linkage and braking synchronization between the safety clamp assemblies 1.
[0027] The clamp 13 includes a main board 131, a top plate 132 at the top of the main board 131, and a bottom plate 133 at the bottom of the main board 131. The top plate 132 of the lower clamp 13 is bolted to the bottom plate 133 of the upper clamp 13. Both the top plate 132 and the bottom plate 133 are provided with through slots for the first lifting plate 11 and the second lifting plate 12 to pass through. The multiple clamps 13 are bolted together by the top plate 132 and the bottom plate 133, which provides good connection stability, compact structure, and saves space.
[0028] A return spring 121 is provided between the bottom of the first lifting plate 11 and the second lifting plate 12 and the bottom plate 133 of the lowest clamp seat 13. One end of the return spring 121 is connected to the bottom of the first lifting plate 11 or the second lifting plate 12, and the other end of the return spring 121 is connected to the bottom plate 133, which is used to automatically reset the first lifting plate 11 and the second lifting plate 12 after braking.
[0029] Each clamp seat 13 has a base plate 133 equipped with a proximity sensor 15 or pressure sensor corresponding to the linkage plate 3. The base plates 133 of the two side clamp seats 13 each have a proximity sensor 15 or pressure sensor corresponding to the linkage plate 3, while the base plate 133 of the middle clamp seat 13 has two proximity sensors 15 or pressure sensors corresponding to the two side linkage plates 3 respectively. This ensures that each end of each linkage plate 3 has two proximity sensors 15 or pressure sensors, used to detect the distance between the linkage plate 3 and the base plate 133 or the pressure exerted by the linkage plate 3 on the base plate 133. If the values detected by the proximity sensors 15 or pressure sensors at both ends of the linkage plate 3 are consistent, it indicates that the linkage plate 3 is in a horizontal state, the braking synchronization between adjacent safety clamp assemblies 1 is good, and the reset is in place. If the values detected by the proximity sensors 15 or pressure sensors at both ends of the linkage plate 3 are inconsistent, it indicates that the linkage plate 3 is in a tilted state, the braking performance between the two safety clamp assemblies 1 connected to the linkage plate 3 is deviated, or the reset is not complete, requiring adjustment.
[0030] The first lifting plate 11 and the second lifting plate 12 are provided with a damping layer 122 on the side near the guide rail 2. The surface of the damping layer 122 has a serrated structure. The guide wedge 14 is provided with a groove 141 on the side facing the guide rail 2. A rolling column 142 protruding from the groove 141 and in contact with the first lifting plate 11 or the second lifting plate 12 is rolled within the groove 141. The damping layer 122 can generate a large frictional force with the elevator guide rail 2, thereby enabling the first lifting plate 11 and the second lifting plate 12 to decelerate and stop the elevator from overspeeding or running away. The serrated surface of the damping layer 122 is designed to increase the frictional force between the damping layer 122 and the elevator guide rail 2, thus achieving better braking. The designed rolling column 142 causes rolling friction between the first lifting plate 11 and the second lifting plate 12 and the guide wedge 14, reducing friction and making the movement of the first lifting plate 11 and the second lifting plate 12 smoother when braking.
[0031] The parts of this utility model not described in detail are existing technologies and therefore will not be specifically described here.
Claims
1. A combination safety clamp, characterized in that: It includes several horizontally parallel safety clamp assemblies (1). Each safety clamp assembly (1) is provided with a first lifting plate (11) and a second lifting plate (12) located on both sides of the guide rail (2). A linkage plate (3) is provided between each pair of adjacent safety clamp assemblies (1). One end of the linkage plate (3) is hinged to the first lifting plate (11) of one of the safety clamp assemblies (1), and the other end of the linkage plate (3) is hinged to the second lifting plate (12) of another safety clamp assembly (1), thereby driving multiple safety clamp assemblies (1) to brake synchronously.
2. The combined safety clamp according to claim 1, characterized in that: The safety clamp assembly (1) includes multiple clamp seats (13) stacked vertically along the guide rail (2). Each clamp seat (13) is provided with a pair of guide wedges (14). Each guide wedge (14) forms a guide groove with the clamp seat (13). The first lifting plate (11) and the second lifting plate (12) extend and are movably connected in the guide grooves corresponding to all clamp seats (13).
3. A combined safety clamp according to claim 2, characterized in that: Multiple linkage plates (3) are distributed along the direction of the guide rail (2) on the first lifting plate (11) and the second lifting plate (12), and each linkage plate (3) corresponds to the clamp seat (13).
4. A combined safety clamp according to claim 2, characterized in that: The clamp (13) includes a main board (131), a top plate (132) on the top of the main board (131), and a bottom plate (133) at the bottom of the main board (131). The top plate (132) of the lower clamp (13) is connected to the bottom plate (133) of the upper clamp (13). Both the top plate (132) and the bottom plate (133) are provided with through slots for the first lifting plate (11) and the second lifting plate (12) to pass through.
5. A combined safety clamp according to claim 4, characterized in that: A return spring (121) is provided between the bottom of the first lifting plate (11) and the second lifting plate (12) and the bottom plate (133) of the lowest clamp (13).
6. A combined safety clamp according to claim 4, characterized in that: Each clamp (13) has a proximity sensor (15) or pressure sensor on its base plate (133) that corresponds to the linkage plate (3).
7. A combined safety clamp according to claim 2, characterized in that: The first lifting plate (11) and the second lifting plate (12) are provided with a damping layer (122) on the side near the guide rail (2). The surface of the damping layer (122) is a sawtooth structure. The guide wedge (14) is provided with a groove (141) on the side facing the guide rail (2). A rolling column (142) with a protruding groove (141) and in contact with the first lifting plate (11) or the second lifting plate (12) is rolled in the groove (141).