Elevator safety clamp braking response time testing device and testing method thereof

Abstract

The invention relates to an elevator safety clamp braking response time testing device and a testing method thereof, belongs to the technical field of elevator accessory detection, and aims to solve the problems that the initial state of an existing testing device is difficult to control and no failure protection exists. A baffle of the bearing part horizontally slides to bear and release the test plate, a bilateral synchronous power assembly drives the baffle to reduce lateral disturbance when the test plate is released, a protection part comprising a buffer plate and a buffer assembly is arranged, and the buffer assembly is matched with a compression spring through an inclined sliding hole to convert vertical impact into buffer resistance. According to the device, initial test conditions are accurately controlled, failure protection is provided, test repeatability and safety are improved, and the device is suitable for the field of elevator accessory detection and the like.

Description

Technical Field

[0001] This invention relates to the field of elevator component testing technology, and in particular to an elevator safety clamp braking response time testing device and its testing method. Background Technology

[0002] In the field of elevator safety brake testing, common testing methods usually revolve around how to simulate the falling conditions of an elevator car. A typical approach is to lift the simulated load equipped with the safety brake to a certain height manually or through a simple lifting mechanism, and then release it to observe whether the safety brake can complete braking on the preset guide rail. The technical focus of this approach is often whether the gravitational potential energy of the simulated load is sufficient to trigger the safety brake action. When implementing this type of test, the structural design of the test device faces some limitations because the test process needs to take into account both load release and braking trigger. For example, in order to facilitate load release, the supporting structure needs to be able to be quickly withdrawn. However, the introduction of the withdrawal action may cause slight changes in the initial state of load release (such as levelness and initial gap with the guide rail) that are difficult to control. In some cases, such slight differences in the initial state may interfere with the contact process between the safety clamp wedge and the guide rail, thereby affecting the repeatability of braking response time measurement. In addition, when the test load is raised to a high position, if the safety clamp fails completely during the test, the load will fall directly onto the rigid structure at the bottom, which poses a risk of damaging the test load and the device itself. This, to some extent, restricts the repeatability of the test process and the safe operating space for test personnel. Therefore, how to more accurately control the initial test conditions while simulating free fall conditions, and provide necessary failure protection during the test, is a direction that can be further considered in the structural design of related test devices. To address the aforementioned issues, this technical solution proposes an elevator safety brake response time testing device and its testing method. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of difficult initial state control and lack of failure protection in existing testing devices, and to propose an elevator safety clamp braking response time testing device and its testing method.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An elevator safety brake response time testing device includes a base plate, four support beams, and a top frame. The four support beams are fixed to the top of the base plate, and the top frame is fixedly connected to the top ends of the four support beams. The testing device further includes: The test plate is slidably mounted between the four support beams and is used to mount the safety clamp to be tested via a mounting bracket; A traction component, mounted on the top frame and connected to the test plate, is used to lift the test plate; A support component, mounted on the support beam, is used to support the test plate after the test plate is lifted, and the support component includes a horizontally sliding baffle; After the baffle is horizontally removed from below the test plate, the test plate falls freely to trigger the safety brake.

[0005] In one possible design, the traction component includes: A pivot is rotatably connected to the top of the top frame; A scroll is fixedly sleeved on the rotating shaft; The traction rope is fixed at one end to the reel and connected to the test plate at the other end. A drive motor is fixed to the top frame, and its output shaft is fixedly connected to the rotating shaft. The drive motor drives the rotating shaft and the reel to rotate, thereby winding or releasing the traction rope and thus lifting and pulling the test board.

[0006] In one possible design, the supporting component further includes: A support plate is fixed to the support beam. A through groove is provided on the support plate, and a baffle passes through and is slidably fitted into the through groove. A transmission rod passes through and is fixed to the baffle, with both ends extending to both sides of the top frame; The power assembly is installed on both sides of the top frame and connected to both ends of the transmission rod; The power component is used to drive the transmission rod to move the baffle horizontally within the through groove, so as to remove or reset it from under the test plate.

[0007] In one possible design, the power assembly includes: An electric actuator is fixed to one side of the top frame; The connecting rod is fixed to the output shaft of the electric push rod; The connecting rod is rotatably connected at both ends to the ends of the connecting rod and the transmission rod, respectively. The electric push rod drives the connecting rod to move vertically, and through the linkage, the vertical motion is converted into the horizontal motion of the transmission rod, thereby driving the baffle to slide.

[0008] In one possible design, the supporting component further includes: A support cover is fixed to one side of the support plate, and one end of the baffle extends into the support cover and is slidably connected to the support cover; A pressure sensor is installed on the inner wall of the support cover; The controller is electrically connected to the pressure sensor, the safety clamp, and the timer. When the baffle is fully retracted and presses against the pressure sensor, the pressure sensor sends a signal to the controller, which then triggers the safety clamp to brake and starts the timer.

[0009] In one possible design, the testing apparatus further includes: A protective component, mounted on the base plate, is used to cushion the falling test plate in the event of a safety clamp brake failure. The protective component includes: A transmission frame is fixed to the top of the base plate, and inclined sliding holes are provided on it; A buffer plate is slidably mounted between the four support beams and located below the test plate; A buffer assembly is installed at the bottom of the buffer plate and slides in conjunction with the sliding hole; When the falling test plate impacts the buffer plate, the buffer assembly slides along the sliding hole, converting the vertical impact into buffer resistance.

[0010] In one possible design, the buffer component includes: Mounting plate, fixed to the bottom of the buffer plate; A sliding rod is fixedly installed between the two mounting plates; A movable plate is slidably fitted onto the slide rod; The sliding plate has one end fixedly connected to the movable plate, and the other end passes through and slides into the sliding hole; A compression spring is sleeved on the slide rod, with its two ends abutting against the moving plate and the mounting plate, respectively; When the buffer plate moves downward, the sliding plate slides obliquely downward along the sliding hole, causing the moving plate to compress the compression spring, thereby absorbing the impact energy.

[0011] In one possible design, the protective component further includes multiple buffer air columns fixed to the top of the buffer plate, the buffer air columns being used to provide initial cushioning when the test plate comes into contact with the buffer plate.

[0012] In one possible design, two limiting guide rails fixed between the base plate and the top frame are also included. The limiting guide rails are used to cooperate with the working surface of the safety clamp to be tested, so as to guide and brake the test plate when the safety clamp is braked. Beneficial effects

[0013] 1. By setting a movable baffle to support and release the test board, the traditional method of directly unhooking or removing the support rod is replaced. The movement path of the baffle is more stable and controllable, which helps to reduce the initial attitude disturbance of the test board at the moment of release and provides more consistent initial conditions for the measurement of braking response time. 2. Using a dual-sided synchronous drive power component to drive the symmetrically arranged baffles can improve the problem of asynchronous withdrawal caused by friction in single-sided drive, further reduce the possibility of lateral disturbance when the test board is released, and improve the repeatability of the test. 3. By setting up protective components including buffer plates and buffer assemblies, the falling test plate can be buffered in the event of complete failure of the safety clamp, avoiding direct collision with the rigid base plate, reducing the risk of damage to the test device and load, and providing failure protection for the test process; 4. The buffer assembly adopts a structure that combines an inclined sliding hole with a compression spring, which can convert part of the vertical impact force into the horizontal spring compression force, so that it can provide a relatively large initial buffer resistance within a limited vertical buffer stroke, making the deceleration process smoother and improving the buffering effect. Attached Figure Description

[0014] Figure 1 This is a first-view three-dimensional structural schematic diagram of an elevator safety clamp braking response time testing device proposed in this invention. Figure 2 This is a three-dimensional schematic diagram of the second-view structure of an elevator safety clamp braking response time testing device proposed in this invention. Figure 3 This is a three-dimensional structural diagram from a third-view perspective of an elevator safety clamp braking response time testing device proposed in this invention; Figure 4 This is a three-dimensional schematic diagram of the top frame, two electric push rods, two transmission rods and two baffles connection structure of an elevator safety clamp braking response time testing device proposed in this invention; Figure 5 This is a three-dimensional schematic diagram of the connection structure of two electric push rods, two transmission rods, two baffles and two support covers of an elevator safety clamp braking response time testing device proposed in this invention; Figure 6 This is a three-dimensional schematic diagram of the connection structure of the buffer plate and two transmission frames of an elevator safety clamp braking response time testing device proposed in this invention; Figure 7 This is a three-dimensional schematic diagram of the connection structure of the slide bar, two moving plates and transmission frame of the elevator safety clamp braking response time testing device proposed in this invention.

[0015] In the diagram: 1. Base plate; 2. Support beam; 3. Top frame; 4. Test plate; 5. Rotating shaft; 6. Reel; 7. Drive motor; 8. Traction rope; 9. Support plate; 10. Cover; 11. Baffle; 12. Transmission rod; 13. Connecting rod; 14. Electric push rod; 15. Connecting rod; 16. Pressure sensor; 17. Buffer plate; 18. Buffer air column; 19. Control display screen; 20. Mounting plate; 21. Slide rod; 22. Moving plate; 23. Transmission frame; 24. Slide hole; 25. Slide plate; 26. Compression spring; 27. Limit guide rail; 28. Mounting frame. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] In one embodiment: Refer to Figure 1-7 A testing device includes a base plate 1. Four vertical support beams 2 are fixedly mounted on the top of the base plate 1 using anchor bolts. These four support beams 2 collectively support a top frame 3. The top frame 3 is fixedly connected to the tops of the four support beams 2 by welding or high-strength bolts, forming a stable portal frame structure.

[0018] like Figure 1-2 As shown, the test plate 4 is located within the space enclosed by four support beams 2. Guide sliders are installed at its four corners, and these guide sliders slide in conjunction with vertical grooves on the support beams 2, allowing the test plate 4 to move only vertically up and down. Two mounting brackets 28 are symmetrically welded to the bottom of the test plate 4 for mounting the safety clamp to be tested (not shown in the figure) using bolts. At the top of the base plate 1, corresponding to the positions of the two mounting brackets 28, two limiting guide rails 27 are symmetrically fixedly installed. The top ends of these two limiting guide rails 27 are also fixedly connected to the bottom of the top frame 3, with their verticality tolerance controlled within 0.5 mm / m. After the safety clamp is installed, its wedge working surface remains parallel to the working surface of the corresponding limiting guide rail 27, with the gap typically adjusted to 1-3 mm to simulate the actual fit between the elevator car and the guide rail.

[0019] like Figure 1-2As shown, the traction component is mounted on the top frame 3. Specifically, a rotating shaft 5 is rotatably connected to the top of the top frame 3 via two bearings. A reel 6 is fixedly mounted on the rotating shaft 5. The reel 6 can be a steel drum with a diameter of 150mm. A traction rope 8, such as a 6mm diameter steel wire rope, has one end fixed to the reel 6 via a pressure plate, and the other end extends downward, passes through a guide pulley on the top frame 3, and is connected to the lifting ring on the top of the test plate 4 via a shackle. A drive motor 7, such as a 1.5kW servo motor, is fixedly mounted on one side of the top of the top frame 3 via a flange, and its output shaft is fixedly connected to one end of the rotating shaft 5 via a coupling. Starting the drive motor 7 can drive the rotating shaft 5 and the reel 6 to rotate, thereby winding or releasing the traction rope 8 to achieve the lifting and pulling of the test plate 4.

[0020] like Figure 5 As shown, the supporting component is used to position and support the test plate 4 before testing. This component includes two L-shaped support plates 9, which are welded to two sets of opposing support beams 2. Each support plate 9 has a 30mm wide slot in its horizontal portion. A rectangular baffle 11 passes through this slot and can slide horizontally within it. The baffle 11 is made of 15mm thick 45# steel plate, and its portion extending beyond the support plate 9 is located directly below the test plate 4 to support it. A transmission rod 12 is welded to the end of the baffle 11 furthest from the test plate 4, with both ends extending to the sides of the top frame 3. In this embodiment, the fit clearance between the baffle 11 and the slot of the support plate 9 is 0.1-0.3mm. If this clearance is too large, the baffle 11 will tilt under load, affecting the levelness of the test plate 4; if the clearance is too small, it may cause slippage due to processing errors or thermal expansion and contraction.

[0021] like Figure 5As shown, the power assembly is used to drive the baffle 11 to retract. A power assembly is installed on each side of the top frame 3. Each power assembly includes a vertically mounted electric push rod 14 with a stroke of 200 mm and a thrust of 500 N. A horizontal connecting rod 15 is fixedly connected to the output shaft of the electric push rod 14. Each end of the connecting rod 15 is rotatably connected to a connecting rod 13 via a first hinge seat. The other end of each connecting rod 13 is rotatably connected to the end of the corresponding transmission rod 12 via a second hinge seat. When the two electric push rods 14 are started synchronously and push the connecting rods 15 downwards, the two transmission rods 12 are driven by the connecting rods 13 on both sides to move the two baffles 11 horizontally away from the center of the test plate 4 until they are completely retracted from the bottom of the test plate 4. The use of dual-sided synchronous drive instead of single-sided drive is based on considerations of the synchronicity of the baffle 11 retraction. If driven from only one side, friction between the baffle 11 and the through slot may cause the baffle 11 to retract asynchronously, resulting in a slight lateral disturbance to the test board 4 at the moment of release.

[0022] like Figure 1-2 As shown, to precisely control the start time of the test, a support cover 10 is bolted to one side of the support plate 9. When the baffle 11 retracts, part of its structure slides into the support cover 10. A pressure sensor 16 with a range of 0-1000N is installed on the inner wall of the support cover 10 facing the direction of movement of the baffle 11. When the baffle 11 is fully retracted and contacts the pressure sensor 16, a pressure signal is generated. A controller and a timer are installed in the control display screen 19 located on the support beam 2. The pressure sensor 16, the electric push rod 14, the drive motor 7, and the trigger circuit of the safety clamp under test (not shown) are all electrically connected to the controller. The start and stop of the timer are controlled by the controller. Its working logic is as follows: when the controller receives a signal from the pressure sensor 16 that it has reached a preset threshold (e.g., 50N), it determines that the baffle 11 has been fully retracted, and the test plate 4 begins free fall. At this time, the controller immediately sends an action command to the trigger circuit of the safety clamp and simultaneously starts the timer.

[0023] like Figure 6-7As shown, the protective component is mounted on the base plate 1 to provide cushioning in the event of complete failure of the safety brake. This component includes two symmetrically welded transmission frames 23 to the top of the base plate 1. Each transmission frame 23 has two inclined sliding holes 24, with the sliding holes 24 forming an angle of 30 degrees with the vertical direction. A buffer plate 17 is located between four support beams 2, and its four corners are also equipped with guide sliders that slide in engagement with another set of vertical sliding grooves on the support beams 2. Two sets of buffer assemblies are symmetrically mounted on the bottom of the buffer plate 17. Each buffer assembly includes two mounting plates 20 bolted to the bottom of the buffer plate 17. A linear shaft 21 with a diameter of 20mm is fixedly mounted between the two mounting plates 20. Two movable plates 22 are slidably fitted onto the sliding rod 21 via linear bearings. A sliding plate 25 is welded to one side of each movable plate 22, the sliding plate 25 passing through the corresponding sliding hole 24 on the transmission frame 23 and sliding in engagement with the inner wall of the sliding hole 24. On the slide bar 21, between the moving plate 22 and the mounting plate 20, a compression spring 26 is fitted on each side. The two ends of the compression spring 26 are connected to hooks welded to the moving plate 22 and the mounting plate 20 respectively via their built-in hooks. The stiffness coefficient of the compression spring 26 is selected based on the total mass of the test plate 4 and the safety clamp; for example, when the total mass is 200 kg, a spring with a stiffness coefficient of 50 N / mm can be selected.

[0024] When the safety clamp fails and the test plate 4 continues to fall, the mounting bracket 28 will first impact the buffer plate 17. The buffer plate 17 moves downwards upon impact, causing the sliding plates 25 of the two buffer components to move obliquely downwards along the inclined sliding holes 24. This oblique movement is decomposed into a vertically downward displacement and a horizontal displacement, thereby forcing the moving plate 22 to slide on the sliding rod 21 towards the mounting plate 20, thus compressing the two compression springs 26. The compression springs 26 store energy and gradually release it, achieving buffering and absorption of the falling impact force. The use of an inclined sliding hole combined with springs, rather than a simple vertical spring buffer, is due to considerations of the non-linearity of the buffer stroke and buffer force. A simple vertical spring has a small force in the initial compression stage, which may lead to a "hard-on-hard" secondary impact; while this structure converts part of the vertical impact force into a horizontal spring compression force through the inclined sliding hole, providing greater initial buffer resistance within a shorter vertical stroke, making the deceleration process smoother. Calculations show that without such a buffer structure, if a 200kg test plate 4 falls freely from a height of 2 meters onto a rigid base plate, the impact force between it and the base plate can instantly reach tens of kilonewtons, which could easily cause plastic deformation or cracking of the test plate 4, mounting bracket 28, or safety clamp housing.

[0025] like Figure 6-7As shown, to further disperse the impact force and prevent the sharp parts of the mounting bracket 28 from directly impacting the steel plate surface of the buffer plate 17, multiple buffer air columns 18 are also glued at equal intervals on the top of the buffer plate 17. These buffer air columns 18 are columnar airbags, approximately 50 mm in height, and their internal air pressure can be adjusted between 0.1 and 0.3 MPa as needed. They provide initial soft cushioning at the moment of contact.

[0026] This application can be used in the field of elevator parts testing technology, or in other fields applicable to this application.

[0027] In another embodiment: Reference Figure 6-7 Based on the above embodiments, an improvement is made to an elevator safety clamp braking response time testing device, which is applied to the field of elevator component testing technology. Considering testing environment or cost limitations, the buffer assembly can have other structural forms. For example, the inclined sliding hole 24 can be changed to a vertical direction, and a hydraulic damper (not shown in the figure) can be set between the sliding plate 25 and the transmission frame 23. The sliding plate 25 is hinged to the top of the piston rod of the hydraulic damper, and the bottom of the cylinder of the hydraulic damper is hinged to the transmission frame 23. When the buffer plate 17 is pressed down, the sliding plate 25 is driven vertically downward through the connecting rod, driving the piston rod of the hydraulic damper to contract, and the impact energy is consumed by the throttling effect of the hydraulic oil. This method has more stable buffering characteristics, but in low-temperature environments, changes in the viscosity of the hydraulic oil may affect the buffering performance, and the maintenance cost is relatively high. Therefore, this solution is more suitable for indoor constant temperature applications where the consistency of buffering performance is required.

[0028] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor 7, electric push rod 14, pressure sensor 16, control display screen 19, controller and timer are conventional means or common knowledge, and will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0029] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An elevator safety brake response time testing device, comprising a base plate (1), four support beams (2), and a top frame (3), wherein the four support beams (2) are fixed to the top of the base plate (1), and the top frame (3) is fixedly connected to the top ends of the four support beams (2), characterized in that, The testing apparatus also includes: The test plate (4) is slidably mounted between the four support beams (2) and is used to mount the safety clamp to be tested via the mounting bracket (28); A traction component is installed on the top frame (3) and connected to the test plate (4) for lifting the test plate (4). A support component, installed on the support beam (2), is used to support the test plate (4) after the test plate (4) is lifted. The support component includes a horizontally sliding baffle (11). Wherein, after the baffle (11) is horizontally removed from below the test plate (4), the test plate (4) falls freely to trigger the safety brake.

2. The elevator safety clamp braking response time testing device according to claim 1, characterized in that, The traction component includes: The pivot (5) is rotatably connected to the top of the top frame (3); A scroll (6) is fixedly sleeved on the rotating shaft (5); The traction rope (8) is fixed at one end to the reel (6) and connected at the other end to the test plate (4); A drive motor (7) is fixed to the top frame (3), and its output shaft is fixedly connected to the rotating shaft (5); The drive motor (7) drives the rotating shaft (5) and the reel (6) to rotate, thereby winding or releasing the traction rope (8) to achieve lifting and pulling of the test plate (4).

3. The elevator safety clamp braking response time testing device according to claim 1, characterized in that, The supporting component also includes: A support plate (9) is fixed to the support beam (2). A through groove is provided on the support plate (9), and the baffle (11) passes through and slides in the through groove. A transmission rod (12) passes through and is fixed to the baffle (11), with both ends extending to the sides of the top frame (3); The power assembly is installed on both sides of the top frame (3) and connected to both ends of the transmission rod (12); The power component is used to drive the transmission rod (12) to move the baffle (11) horizontally within the through groove, so as to remove or reset it from below the test plate (4).

4. The elevator safety clamp braking response time testing device according to claim 3, characterized in that, The power assembly includes: An electric push rod (14) is fixed to one side of the top frame (3); The connecting rod (15) is fixed to the output shaft of the electric push rod (14); The connecting rod (13) is rotatably connected at both ends to the ends of the connecting rod (15) and the transmission rod (12), respectively; The electric push rod (14) drives the connecting rod (15) to move vertically, and through the transmission of the connecting rod (13), the vertical motion is converted into the horizontal motion of the transmission rod (12) to drive the baffle (11) to slide.

5. The elevator safety clamp braking response time testing device according to claim 3, characterized in that, The supporting component also includes: A support cover (10) is fixed to one side of the support plate (9), and one end of the baffle (11) extends into the support cover (10) and is slidably connected to the support cover (10). A pressure sensor (16) is installed on the inner wall of the support (10); The controller is electrically connected to the pressure sensor (16), the safety clamp, and the timer; When the baffle (11) is completely withdrawn and presses against the pressure sensor (16), the pressure sensor (16) sends a signal to the controller, and the controller then triggers the safety clamp to brake and starts the timer.

6. The elevator safety clamp braking response time testing device according to claim 1, characterized in that, The testing apparatus also includes: The protective component is installed on the base plate (1) and is used to cushion the falling test plate (4) when the safety clamp brake fails. The protective component includes: The transmission frame (23) is fixed to the top of the base plate (1) and has an inclined sliding hole (24) on it. A buffer plate (17) is slidably mounted between the four support beams (2) and located below the test plate (4); A buffer assembly is installed at the bottom of the buffer plate (17) and slides in cooperation with the sliding hole (24); When the falling test plate (4) hits the buffer plate (17), the buffer assembly slides along the sliding hole (24) to convert the vertical impact into buffer resistance.

7. The elevator safety clamp braking response time testing device according to claim 6, characterized in that, The buffer component includes: Mounting plate (20) is fixed to the bottom of the buffer plate (17); The slide bar (21) is fixedly installed between the two mounting plates (20); The movable plate (22) is slidably sleeved on the slide rod (21); The slide plate (25) is fixedly connected at one end to the movable plate (22), and the other end passes through and slides into the sliding hole (24). A compression spring (26) is sleeved on the slide rod (21), and its two ends abut against the moving plate (22) and the mounting plate (20) respectively; When the buffer plate (17) moves down, the slide plate (25) slides obliquely downward along the sliding hole (24), causing the moving plate (22) to compress the compression spring (26), thereby absorbing the impact energy.

8. The elevator safety clamp braking response time testing device according to claim 7, characterized in that, The protective component also includes a plurality of buffer air columns (18) fixed to the top of the buffer plate (17), the buffer air columns (18) being used to provide initial cushioning when the test plate (4) comes into contact with the buffer plate (17).

9. An elevator safety clamp braking response time testing device according to any one of claims 2 to 8, characterized in that, It also includes two limiting guide rails (27) fixed between the base plate (1) and the top frame (3). The limiting guide rails (27) are used to cooperate with the working surface of the safety clamp to be tested, so as to guide and brake the test plate (4) when the safety clamp is braked.

10. A testing method, applied to the elevator safety clamp braking response time testing device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Installation preparation: Install the safety clamp on the two mounting brackets (28) at the bottom of the test plate (4), and ensure that the safety clamp is in sync with the two limit guide rails (27) symmetrically fixed on the top of the base plate (1). At the same time, check whether the connection of each component of the test device is secure, including the traction component, the support component, the protective component, etc. S2, Traction test plate: Start the drive motor (7), the drive motor (7) drives the rotating shaft (5) to rotate, the rotating shaft (5) drives the reel (6) to rotate, the traction rope (8) is wound on the reel (6), and the test plate (4) is pulled upward by the traction rope (8) until the test plate (4) moves above the part that the supporting component can support; S3, Supporting the test plate: The two baffles (11) of the supporting component support the test plate (4). At this time, the test plate (4) stops moving upward. The drive motor (7) is started to drive the rotating shaft (5) to rotate in the opposite direction and release the traction rope (8), so that the traction rope (8) loses its traction force on the test plate (4), but the test plate (4) is still supported by the baffle (11). S4. Prepare for free fall: Start the electric push rod (14) of the two power components. The electric push rod (14) drives the connecting rod (15) to move downward. The connecting rod (15) drives the two transmission rods (12) to move away from each other through the two connecting rods (13). The transmission rods (12) drive the two baffles (11) to move away from each other until the baffles (11) move to the bottom of the test plate (4) and disengage. S5. Triggering the safety clamp and timing: After the baffle (11) moves to the position where it is separated from the test plate (4), it generates pressure on the pressure sensor (16) on the inner wall of the cover (10). After the pressure sensor (16) senses the pressure, it starts the safety clamp through the controller. At the same time, the controller starts the timer to start timing the running time of the safety clamp. S6. Test the safety clamp braking response time: The test plate (4) moves downward in free fall under the action of gravity, simulating the situation of the elevator falling downward. After the safety clamp is triggered, it clamps and brakes the limit guide rail (27) to stop the test plate (4) from falling. When the safety clamp clamps and positions itself on the limit guide rail (27), the timer stops and the control display screen (19) displays the time. This time is the response time of the safety clamp. S7. Safety Protection (If the safety clamp fails to brake): If the safety clamp fails and loses its braking effect on the test plate (4), the test plate (4) continues to fall, and the two mounting brackets (28) fall on the buffer plate (17), causing the two buffer components to move downward. The slide plate (25) of the buffer component moves diagonally downward along the corresponding sliding hole (24), causing the moving plate (22) to move along the sliding rod (21), compressing the compression spring (26), and using the elastic force of the compression spring (26) to buffer and support the buffer plate (17). At the same time, the multiple buffer air columns (18) on the top of the buffer plate (17) support the test plate (4), avoiding direct contact between the two mounting brackets (28) and the buffer plate (17), and preventing damage to the safety clamp that has failed. S8. Inspection and Repeat Testing: Inspect the faulty safety gear. After the inspection is completed, repeat the above steps S1-S7 to conduct multiple tests to obtain more accurate safety gear braking response time data.

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