Metal rubber based shock absorbing elevator safety gear

Abstract

The application relates to a metal-rubber-based damping and buffering elevator safety clamp, which comprises a shell, two symmetrical clamping plates are arranged in the shell, a pushing plate is connected to the side of each clamping plate through a metal-rubber-based damping and buffering unit, and the pushing plates on the two sides are driven to move towards or away from each other through a cam transmission mechanism. Compared with a traditional elevator safety clamp, the used structure is a movement mode that a sliding block moves along a wedge-shaped block, the action is relatively violent in the initial stage of elevator speed loss, and the car has relatively obvious vibration. The application improves the stability in the movement process through the cam transmission mode; the metal-rubber-based damping and buffering unit is adopted, has relatively large damping characteristics, can absorb energy through the friction between the metal rubbers, and greatly improves the damping effect of the damping device, slows down the instability of the contact between the clamping plates and the elevator guide rails, and enables the elevator to run relatively stably in the clamping process of the safety clamp.

Description

Technical Field

[0001] This invention relates to a vibration-damping and buffering elevator safety clamp based on metal rubber, and relates to the field of elevator safety braking and vibration damping. Background Technology

[0002] Elevator safety clamps, as a safety protection device, are an indispensable component in the elevator industry. They are widely used in elevators to ensure safety performance. Their function is to quickly lock the elevator car in the event of an accident, preventing it from falling freely and ensuring passenger safety.

[0003] However, elevator cars experience bumps and swaying during high-speed ascents or sudden descents, which can negatively impact the physical and mental health of passengers and damage the elevator's structure and equipment. Traditional safety clamp devices typically use a slider that moves along a wedge-shaped block, squeezing the guide rail for braking. The buffer units used are often disc springs or U-shaped springs. Disc springs require high precision in their fit with the spindle, resulting in unstable parameters and poor repeatability and stability; U-shaped springs are large and stiff, but their buffering effect is generally poor. Therefore, these materials are not ideal for vibration reduction and cannot effectively mitigate elevator bumps and swaying. Furthermore, current safety clamp patent technologies often only add buffer springs or support plates to improve buffering capacity, without significantly altering the transmission and contact methods compared to traditional safety clamps. This results in problems such as high impact force at contact and high instability, failing to effectively address the bumps and swaying caused by emergency braking in the event of an elevator accident.

[0004] To address this issue, a vibration-damping elevator safety clamp based on metal rubber is proposed, primarily solving the problems existing in vibration damping of traditional elevator safety clamps. Metal rubber material possesses excellent elasticity and heat resistance; its application in the vibration damping device of elevator safety clamps offers advantages such as good vibration reduction effect, high durability, and reliable safety. It can more effectively absorb and dissipate the impact and vibration energy generated during elevator braking, improving the smoothness and safety of elevator operation. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a vibration damping and buffering elevator safety clamp based on metal rubber.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is: a vibration damping and buffering elevator safety clamp based on metal rubber, including a housing, wherein two symmetrical clamping plates are provided inside the housing, and the sides of the clamping plates are connected to a push plate through a metal rubber vibration damping and buffering unit. The push plates on both sides are driven by a cam transmission mechanism to move towards or away from each other.

[0007] Preferably, the housing includes a base, and a support plate is fixed to the front of the base by pins to form a mounting chamber for the components inside the base.

[0008] Preferably, the cam transmission mechanism includes a rotating unit located beside each push plate. The rotating unit is mounted on the base and the inner side of the support plate via a camshaft and an oil-free bushing. A push cam is fixed on the camshaft by a fixing pin. A rotating shaft is fixed inside the push cam by a threaded connection. A lifting rod located outside the housing is fixed to the rotating shaft by a washer and a nut. When the lifting rod is pulled upward, it can drive the rotating shaft to rotate along the clearance arc groove opened on the support plate, and at the same time drive the push cam to rotate.

[0009] Preferably, the rotating shaft is connected to one end of the rocker arm and is limited by a retaining ring. The other end of the rocker arm is connected to a rolling wheel, which is installed inside the sliding block. The sliding block slides up and down along a guide rod installed inside the housing. The sliding block is pushed by a rotating cam, which is installed on the output shaft of a drive motor. The drive motor is installed on a motor mounting plate, which is installed on a base. The drive motor drives the rotation of the rotating cam, which in turn drives the rocker arm to rotate, and then drives the rotation of the push cam.

[0010] Preferably, the push plate includes a push plate one and a push plate two. The push cam is in contact with the push plate one. The push plate one is equipped with a displacement sensor. The displacement sensor and the push plate two maintain a certain installation distance. The push plate one and the vibration damping unit are connected by a bolt assembly and in contact by a metal rubber assembly. The metal rubber assembly is composed of several vertically arranged metal rubber columns arranged closely together and installed inside the vibration damping unit.

[0011] Preferably, the first push plate is connected to the base via a fixed spring threaded pin, a common spring, and an adjustable spring threaded pin. The second push plate and the upper and lower ends of the first push plate within the vibration damping unit have protrusions that are embedded in grooves inside the base, allowing them to slide along the grooves. The second push plate is connected to the clamping plate via a connecting assembly and an oil-free bushing. The clamping plate can rotate to a certain extent, and a dead stop is installed on the clamping plate to limit its rotation range. A fixed spring threaded pin, a common spring, and an adjustable spring threaded pin are also installed between the clamping plate and the second push plate. An electromagnet is installed in the middle of the clamping plate; the electromagnet's magnetic force can be changed by controlling the current. An acceleration sensor is installed on the side of the base to detect changes in the car's acceleration and provide a detection signal.

[0012] Preferably, the cross-section of the metal rubber column is a right triangle with two equal right-angled sides, and the sides of two adjacent metal rubber columns are in close contact. The metal rubber assembly is composed of metal rubber columns arranged in a quadrilateral shape and installed inside the second push plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] (1) Compared with the traditional elevator safety clamp, the structure used is a sliding block moving along a wedge block. The movement is relatively violent in the initial stage of elevator stall, which will cause the car to vibrate more obviously. The present invention improves the stability of the movement process by using cam transmission.

[0015] (2) The metal rubber damping buffer unit is adopted, which has a large damping characteristic. It can absorb energy through the friction between the metal rubber, thereby greatly improving the damping effect of the damping device, reducing the instability of the contact between the clamping plate and the elevator guide rail, and enabling the elevator to run relatively smoothly during the clamping process of the safety clamp.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 The schematic diagram illustrates the overall structure of the present invention;

[0018] Figure 2 The diagram illustrates the front view of the present invention.

[0019] Figure 3 It indicated Figure 2 AA sectional view;

[0020] Figure 4 It indicated Figure 3 BB cross-sectional diagram;

[0021] Figure 5 It indicated Figure 3 CC cross-sectional view;

[0022] Figure 6 It indicated Figure 3 DD cross-sectional view;

[0023] Figure 7 The schematic diagram illustrates the structure of the rotating unit of the present invention;

[0024] Figure 8 The schematic diagram illustrates the structure of the motor drive unit of the present invention;

[0025] Figure 9 The schematic diagram illustrates the structure of the vibration damping buffer unit of the present invention;

[0026] Figure 10 The diagram illustrates a cross-sectional view of the metal-rubber assembly in an embodiment of the present invention.

[0027] In the diagram: 1. Base; 2. Support plate; 3. Pin; 4. Rotating unit; 401. Oil-free bushing one; 402. Camshaft; 403. Propulsion cam; 404. Rotating shaft; 405. Fixing pin; 406. Lifting rod; 407. Washer; 408. Nut; 409. Shaft retaining ring; 5. Vibration damping and buffer unit; 501. Dead stop; 502. Oil-free bushing two; 503. Connecting assembly; 504. Propulsion plate two; 505. Adjustable spring threaded pin two; 506. Ordinary spring two; 50 7. Fixed spring threaded pin II; 508. Clamping plate; 509. Electromagnet; 6. Motor drive unit; 601. Drive motor; 602. Rolling wheel; 603. Motor mounting plate; 604. Rotating cam; 605. Sliding block; 606. Rocker arm; 607. Guide rod; 7. Push plate I; 8. Bolt assembly; 9. Fixed spring threaded pin I; 10. Ordinary spring I; 11. Adjustable spring threaded pin I; 12. Displacement sensor; 13. Metal-rubber assembly; 14. Accelerometer. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] like Figures 1-10 As shown, this embodiment provides a vibration-damping and buffering elevator safety clamp based on metal rubber, which improves the vibration-damping and buffering capacity of the safety clamp and solves the problem that commonly used progressive safety clamps cannot effectively reduce car bumps and vibrations during braking. The safety clamp includes a housing, inside which are two symmetrical clamping plates. The sides of each clamping plate are connected to a push plate via a metal rubber vibration-damping and buffering unit. The push plates on both sides are driven by a cam transmission mechanism to move closer or further apart.

[0032] In this embodiment of the invention, the housing includes a base 1, and a support plate 2 is fixed to the front of the base 1 by pins 3 to form an installation chamber for components inside the base 1.

[0033] In this embodiment of the invention, the cam transmission mechanism includes a rotating unit 4 located beside each push plate. The rotating unit 4 is mounted on the base 1 and the inner side of the support plate 2 via a camshaft 402 and an oil-free bushing 401. A push cam 403 is fixed on the camshaft 402 by a fixing pin 405. A rotating shaft 404 is fixed inside the push cam 403 by a threaded connection. A lifting rod 406 located outside the housing is fixed to the rotating shaft 404 by a washer 407 and a nut 408. When the lifting rod 406 is pulled upward, it can drive the rotating shaft 404 to rotate along the clearance arc groove opened on the support plate 2, and at the same time drive the push cam 403 to rotate.

[0034] In this embodiment of the invention, the rotating shaft 404 and the rocker arm 606 are connected at one end and limited by the shaft retaining ring 409. The other end of the rocker arm 606 is connected to the rolling wheel 602. The rolling wheel 602 is installed inside the sliding block 605. The sliding block 605 slides up and down along the guide rod 607 installed inside the housing. The sliding block 605 is pushed by the rotating cam 604. The rotating cam 604 is installed on the output shaft of the drive motor 601. The drive motor 601 is installed on the motor mounting plate 603. The motor mounting plate 603 is installed on the base 1. The rotation of the rotating cam 604 is driven by the drive motor 601, which in turn drives the rocker arm 606 to rotate, and drives the rotation of the push cam 403.

[0035] In this embodiment of the invention, the push plate includes a first push plate 7 and a second push plate 504. The push cam 403 is in contact with the first push plate 7. The first push plate 7 is equipped with a displacement sensor 12. The displacement sensor 12 and the second push plate 504 maintain a certain installation distance. The first push plate 7 and the vibration damping buffer unit 5 are connected by a bolt assembly 8 and in contact by a metal rubber assembly 13. The metal rubber assembly 13 is composed of several vertically arranged metal rubber columns arranged closely together and installed inside the vibration damping buffer unit 5.

[0036] In this embodiment of the invention, the push plate 7 is connected to the base 1 via a fixed spring threaded pin 9, a common spring 10, and an adjustable spring threaded pin 11. The upper and lower ends of the push plate 7 and the second push plate 504 within the vibration damping unit 5 have protrusions. These protrusions are embedded in grooves inside the base 1 and can slide along the grooves. The second push plate 504 is connected to the clamping plate 508 via a connecting assembly 503 and an oil-free bushing 502. The clamping plate 508 can rotate to a certain extent. A dead stop 501 is installed on the clamping plate 508 to limit its rotation range. A fixed spring threaded pin 507, a common spring 506, and an adjustable spring threaded pin 505 are also installed between the clamping plate 508 and the second push plate 504. An electromagnet 509 is installed in the middle of the clamping plate 508. The electromagnet 509 can change its magnetic force by controlling the current. An acceleration sensor 14 is installed on the side of the base 1 to detect changes in the car's acceleration and provide a detection signal.

[0037] The displacement sensor is installed at a certain distance from the second propeller plate to detect the compression of the metal rubber during vibration damping. Based on the compression of the metal rubber, it provides a variable magnetic force to the electromagnet, thereby adjusting the friction between the second propeller plate and the track, and thus adjusting the braking effect. The magnetic force of the electromagnet is gradually increased during the compression of the metal rubber to prevent damage due to excessive vibration exceeding its load-bearing limit, thereby increasing the lifespan of the metal rubber and enhancing braking capability.

[0038] The acceleration sensor is used to detect changes in acceleration during car operation, providing signals for fault diagnosis, real-time monitoring of the elevator, and feedback to the motor drive unit for motor braking, thus achieving intelligent control.

[0039] In this embodiment of the invention, the cross-section of the metal rubber column is a right triangle with two equal right-angled sides, and the sides of two adjacent metal rubber columns are in close contact. The metal rubber assembly is composed of metal rubber columns arranged in a quadrilateral shape and installed inside the second push plate.

[0040] In this embodiment of the invention, the working process is as follows: the metal rubber-based vibration damping and buffer elevator safety clamp is installed at both ends of the lower crossbeam of the elevator car, and is connected to the lifting rod of the safety clamp lifting mechanism through a fork. The safety clamp lifting mechanism is connected to the speed governor. When the elevator car descends at excessive speed or falls due to an accident, the acceleration sensor detects the abnormal acceleration of the car first, quickly causing the motor drive unit to brake. The rotating cam 604 pushes the sliding block 605 downwards, thereby rotating the swing arm 606. The rotation of the swing arm 606 causes the push cam 403 to rotate. Subsequently, the elevator speed limiter activates, causing the safety clamp lifting mechanism to actuate. The lifting mechanism drives the safety clamp lifting rod 406 to rotate around the camshaft 402. The camshaft 402 drives the push cam 403 to rotate, and the push cam 403 contacts the push plate 7, thus pushing the push plate 7 to move horizontally. The push plate 7 is connected to the vibration damping unit 5, thus causing the vibration damping unit 5 to move horizontally. When the clamping plate 508 contacts the elevator guide rail, due to… Due to the instability of the contact surface, the clamping plate 508 will rotate to a certain extent. Under the balancing action of the ordinary spring 506, it will make stable contact with the elevator guide rail and then stop moving. The push plate 7 will continue to move horizontally to compress the metal rubber assembly 13, which will play a role in vibration reduction. While the metal rubber assembly 13 is being compressed, the displacement sensor 12 detects the compression process of the metal rubber. The feedback information causes the electromagnet 509 to generate magnetic force, thereby increasing the friction between the push plate 504 and the guide rail and accelerating the stopping of the car. At the same time, when the metal rubber reaches the compression limit, the magnetic force of the electromagnet 509 is increased to ensure that there is a sufficiently large friction between it and the guide rail. After the car stops moving, the contraction action of the ordinary spring 10 will cause the vibration damping buffer unit 5 and the push plate 7 to return to their original installation positions.

[0041] In this embodiment of the invention, the acceleration sensor 14 is used to detect the acceleration change of the elevator car and serve as a signal for fault detection. The maximum acceleration of the elevator car during normal operation is V1. When the acceleration V2 detected by the acceleration sensor 14 is greater than V1, it is determined that the car has stalled and a fault has occurred, requiring emergency braking, which in turn causes the motor drive unit to perform braking behavior.

[0042] In this embodiment of the invention, both motor-driven braking and wire rope braking are used simultaneously. In the initial stage of elevator stall, the rapid action of the motor-driven braking can be used to brake first, thereby preventing the car from falling at high speed. After the motor braking is activated, the wire rope braking is then applied, which provides a dual protection for the car's safety braking. While improving safety, the braking process is also more stable because the car does not undergo prolonged acceleration and its speed is relatively low.

[0043] In this embodiment of the invention, the lifting rod 406 and the swing rod 606 drive the push cam 403 to rotate to achieve the clamping process. The push cam 403 and the push plate 7 are in contact with each other. By adopting the cam transmission method, the clamping movement of the safety clamp can be made more stable and smooth, ensuring that the clamping plate 508 moves quickly while improving the stability of the overall structure.

[0044] In this embodiment of the invention, when the clamping plate 508 just comes into contact with the elevator guide rail, the clamping plate 508 will make micro-adjustments based on its own rotation characteristics and the connecting ordinary spring 506 according to the instability of contact with the guide rail, so as to play a certain buffering role, reduce the vibration characteristics when the clamping plate 508 first contacts the guide rail, and ensure the stability of the car.

[0045] In this embodiment of the invention, after the clamping plate 508 contacts the elevator guide rail, the contact surface begins to generate friction with the guide rail. As the cam rotates, the push plate 7 continuously squeezes the vibration damping buffer unit 5, causing the friction of the contact surface to continuously increase. At this time, the push plate 7 begins to compress the metal rubber component 13 inside the push plate 504. At the same time, the displacement sensor 12 detects the amount of compression of the metal rubber and feeds back information to make the electromagnet 509 generate magnetic force, further increasing the friction between it and the guide rail. During the compression of the metal rubber, the surfaces of the metal rubber columns rub against each other. As the left and right movements of the metal rubber component are constrained, the metal wires that slip on the inner and outer surfaces of the metal rubber are constrained more. The metal wires between the layers become denser and denser, and the squeezing between the metal wires becomes more and more obvious. Its damping characteristics gradually increase and its stiffness gradually increases. The vibration damping effect and load-bearing capacity of the metal rubber gradually increase. The remaining vibration energy can be absorbed by the metal rubber component to make the whole system reach a stable state.

[0046] In this embodiment of the invention, after the car comes to a smooth stop, the safety clamp needs to be returned to its initial operating position. The ordinary spring 10 plays the role of returning, and through its contraction action, it pulls the push plate 7 and the vibration damping buffer unit 5 back to their initial positions, so that the clamping plate 508 and the elevator guide rail do not get stuck, thus ensuring the cyclic use of the safety clamp.

[0047] During structural installation, the safety clamp controls the installation length of adjustable spring threaded pin 11 and adjustable spring threaded pin 2 505, allowing ordinary springs 10 and 2 506 to generate a certain preload, thus achieving preload on the entire structure. During operation, the smoothness of the cam motion is first utilized to propel the clamping plate 508. Then, the rotational characteristics of the clamping plate 508 and the ordinary spring 2 506 are used for fine-tuning, reducing vibration when the clamping plate 508 initially contacts the guide rail, ensuring the stability of the elevator car. During the compression and friction phase between the clamping plate 508 and the guide rail, the pusher plate 7 compresses the metal-rubber assembly 13, enabling the safety clamp to quickly absorb large impact forces. Simultaneously, the displacement sensor 12 detects the compression of the metal-rubber and provides real-time feedback to apply a continuously increasing current to the electromagnet 509, continuously increasing the friction between it and the guide rail. After the metal-rubber reaches its compression limit, the greater magnetic force of the electromagnet 509 ensures sufficient friction with the guide rail, preventing excessive compression and damage to the metal-rubber while allowing the elevator car to stop smoothly. This rotatable and adjustable clamping plate avoids excessive impact force at the moment of contact with the guide rail and quickly dissipates impact energy within a limited stroke, allowing the elevator car to stop more smoothly and reducing damage to the elevator and passengers during large impacts. Furthermore, by employing a method of braking the motor first and then the wire rope, measures are taken at the initial stage of car stall to prevent excessive stall and severe vibration during braking, ensuring the reliability of dual braking. Moreover, by detecting the car's acceleration signal and monitoring the compression of the metal rubber, a degree of intelligent control is achieved, significantly improving the braking capacity, safety performance, and cushioning performance of the safety clamp. In addition, this invention uses metal rubber, a component with excellent damping and vibration reduction properties, enabling the safety clamp to adapt well to various harsh environments, solving the problems of poor damping performance and easy damage of traditional safety clamps, and greatly improving the vibration reduction and cushioning capacity of the progressive safety clamp.

[0048] Based on the excellent vibration damping and buffering properties of metal rubber and its strong environmental adaptability (resistant to high and low temperatures, anti-aging, and non-volatile), this invention utilizes metal rubber to achieve a progressive safety clamp with better vibration damping and buffering effect. At the same time, it combines motor braking and wire rope braking, and adopts cam drive. By utilizing the smoothness of cam drive and the active adjustment performance of clamping plate, it reduces the violent vibration of the car during braking, so that the car can brake more smoothly in the event of an accident.

[0049] Compared to traditional elevator safety clamps, which use a sliding block that moves along a wedge, this invention features a more drastic movement during the initial stage of elevator stall, causing noticeable vibrations in the car. This invention improves the smoothness of the movement by using a cam drive.

[0050] This invention uses metal rubber as a damping and vibration reduction buffer material. The cross-sectional profile of the metal rubber assembly is composed of individual metal rubber columns with right-angled triangular cross sections, which has large damping characteristics and can absorb energy through friction between the metal rubbers, thereby greatly improving the vibration reduction effect of the vibration reduction device.

[0051] This invention employs a combination of motor braking and wire rope braking, with the motor braking first and the wire rope braking later. This allows for braking measures to be taken at the initial stage of car stall, preventing the car from falling at high speed. This not only provides dual protection for the car's safety braking, but also makes the braking process smoother because the car does not undergo prolonged acceleration and its speed is relatively low.

[0052] The clamping plate and the push plate of this invention are connected by a rotation, allowing them to rotate freely to a certain extent. At the same time, a common spring is connected in the middle, which can reduce the instability of the contact between the clamping plate and the elevator guide rail when the clamping plate contacts the elevator guide rail, so that the elevator can run more smoothly during the clamping process of the safety clamp.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A vibration-damping and buffering elevator safety clamp based on metal rubber, characterized in that: The device includes a housing with two symmetrical clamping plates inside. Each clamping plate has a push plate connected to its side via a metal-rubber vibration-damping unit. The push plates are driven by a cam transmission mechanism to move closer or further apart. The housing also includes a base with a support plate fixed to its front by pins, forming a mounting chamber for components inside the base. The cam transmission mechanism includes a rotating unit located beside each push plate. The rotating unit is mounted inside the base and support plate via a camshaft and an oil-free bushing. A push cam is fixed to the camshaft by a fixing pin, and a rotating shaft is fixed inside the push cam by a threaded connection. The rotating shaft is secured by a washer and a nut. A lifting rod is located outside the housing. When the lifting rod is pulled upward, it can drive the rotating shaft to rotate along the clearance arc groove opened on the support plate, and at the same time drive the propulsion cam to rotate. The rotating shaft is connected to one end of the rocker arm and is limited by the shaft retaining ring. The other end of the rocker arm is connected to the rolling wheel, which is installed inside the sliding block. The sliding block slides up and down along the guide rod installed inside the housing. The sliding block is pushed by the rotating cam, which is installed on the output shaft of the drive motor. The drive motor is installed on the motor mounting plate, which is installed on the base. The drive motor drives the rotation of the rotating cam, which in turn drives the rocker arm to rotate, and drives the propulsion cam to rotate.

2. The vibration-damping and buffering elevator safety clamp based on metal rubber according to claim 1, characterized in that: The propulsion plate includes a propulsion plate one and a propulsion plate two. The propulsion cam is in contact with the propulsion plate one. The propulsion plate one is equipped with a displacement sensor. The displacement sensor and the propulsion plate two maintain a certain installation distance. The propulsion plate one and the vibration damping unit are connected by a bolt assembly and in contact by a metal rubber assembly. The metal rubber assembly is composed of several vertically arranged metal rubber columns arranged closely together and installed inside the vibration damping unit.

3. The vibration-damping and buffering elevator safety clamp based on metal rubber according to claim 2, characterized in that: The first propulsion plate is connected to the base via a fixed spring threaded pin, a common spring, and an adjustable spring threaded pin. The second propulsion plate and the upper and lower ends of the first propulsion plate within the vibration damping unit have protrusions that are embedded in grooves inside the base, allowing them to slide along the grooves. The second propulsion plate is connected to the clamping plate via a connecting assembly and an oil-free bushing. The clamping plate can rotate to a certain extent, and a dead stop is installed on it to limit the range of rotation. A fixed spring threaded pin, a common spring, and an adjustable spring threaded pin are also installed between the clamping plate and the second propulsion plate. An electromagnet is installed in the middle of the clamping plate; the electromagnet's magnetic force can be changed by controlling the current. An acceleration sensor is installed on the side of the base to detect changes in the car's acceleration and provide a detection signal.

4. The vibration-damping and buffering elevator safety clamp based on metal rubber according to claim 2, characterized in that: The cross-section of the metal rubber column is a right triangle with two equal right-angled sides. The sides of two adjacent metal rubber columns are in close contact. The metal rubber assembly is composed of metal rubber columns arranged in a quadrilateral shape and installed inside the second propulsion plate.

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