Elevator landing door strength detection device

Abstract

The invention discloses an elevator landing door strength detection device, and relates to the technical field of elevator detection. The device comprises a rack, a bottom sliding rail, a top sliding rail, a limiting mechanism, a driving mechanism, two bearing frames and a driving part are arranged on the rack, top plates are arranged at the two ends of the top sliding rail, the limiting mechanism is used for limiting or releasing limiting of a door plate, the driving mechanism is used for driving the door plate to slide, one bearing frame is a fixed frame and fixedly arranged on the rack, and the other bearing frame is a movable frame and fixedly arranged on the rack. And the other bearing frame is a movable frame and is arranged on the rack in a sliding manner. When the elevator landing door strength detection device is used for detecting the strength of an elevator landing door, a static load and an instantaneous impact force can be applied to the center of a door plate and the position which is one fourth of the width away from the door edge, force possibly generated when passengers depend on or collide with luggage or a trolley is simulated, a five-detection-point double-detection mode is achieved, and the detection result is more comprehensive and accurate; and the overall safety performance of the landing door during complex impact in actual use can be fully evaluated, so that the method is more practical.

Description

An elevator landing door strength testing device Technical Field

[0001] This invention relates to the field of elevator testing technology, and specifically to an elevator landing door strength testing device. Background Technology

[0002] Elevator landing doors are a crucial safety device in elevator systems. Installed at the entrance to each floor's elevator lobby, they are located at the opening in the elevator shaft wall on each floor. Before the elevator car reaches that floor, the shaft opening is completely closed to prevent people or objects from accidentally falling into the shaft. When the elevator car accurately levels and stops at the floor, the landing door opens, providing passengers with access. Elevator landing door strength testing is a vital part of elevator safety testing. Its purpose is to ensure that the landing door has sufficient strength and rigidity to prevent excessive deformation, cracking, or detachment from the guide rails under accidental impact, thereby preventing passengers from falling into the shaft. In the event of a serious accident, the strength testing of elevator landing doors requires applying static loads and instantaneous impact forces to the landing doors to simulate the forces that may be generated by passengers leaning against them, luggage, or trolleys hitting them. The testing force needs to be applied to the center of the door panel and at a distance of one-quarter of the door edge. Existing elevator landing door strength testing devices usually have a single testing method, which can only apply a single testing force to the landing door. At the same time, the testing position is relatively fixed, making it difficult to conduct multi-point testing. This may result in incomplete and inaccurate test results, and it is impossible to fully assess the overall safety performance of the landing door when facing complex impacts in actual use. Therefore, an elevator landing door strength testing device is proposed. Summary of the Invention

[0003] The purpose of this invention is to address the technical problem that conventional detection methods are limited to a single detection force applied to the landing door, and the detection location is relatively fixed, making it difficult to perform multi-point detection. This may result in incomplete and inaccurate detection results, failing to fully assess the overall safety performance of the landing door when faced with complex impacts in actual use. This invention provides an elevator landing door strength detection device.

[0004] To achieve the above objectives, the present invention specifically adopts the following technical solution: an elevator landing door strength testing device, comprising a frame, on which a bottom slide rail, a top slide rail, a limiting mechanism, a driving mechanism, two support frames, and a driving component are provided. Both ends of the top slide rail are provided with top plates. The limiting mechanism is used to limit or release the door panel, and the driving mechanism is used to drive the door panel to slide. One support frame is a fixed frame and is fixed to the frame, while the other support frame is a movable frame and is slidably mounted on the frame. The driving component is used to drive the movable frame to slide along a rectangular trajectory. A sliding plate is slidably mounted on the support frame, and a compression spring is provided between the two. A hydraulic push rod is provided on the sliding plate, and a detection block with a frustum-shaped structure is provided at the movable end of the hydraulic push rod. The support frame is provided with a limiting component and a driving component. The limiting component is used to limit or release the sliding plate, and the driving component is used to drive the hydraulic push rod to move in one direction.

[0005] Furthermore, both the bottom slide rail and the top slide rail are constructed with multiple grooves, and rollers are rotatably arranged in the grooves.

[0006] Furthermore, the limiting mechanism includes a limiting frame slidably mounted on the frame, a cylinder push rod with a movable end connected to the limiting frame on the frame, and multiple limiting blocks of different lengths on the limiting frame.

[0007] Furthermore, the drive mechanism includes a lead screw rotatably mounted on a frame, a drive motor connected to the lead screw and an output shaft mounted on the frame, and a drive block slidably mounted on the frame and threadedly engaged with the lead screw.

[0008] Furthermore, the driving component includes four sprockets that are rotatably mounted on the frame and distributed in a rectangular shape. The frame is equipped with a fixed motor that is connected to one of the sprockets via an output shaft. A chain is wound around the four sprockets, and the moving frame is connected to the chain.

[0009] Furthermore, the limiting component includes an electromagnet mounted on a support frame, a limiting rod slidably mounted on the support frame and a compression spring between the two, one end of the limiting rod abutting against the sliding plate and the other end magnetically attracting the electromagnet.

[0010] Furthermore, the driving component includes a driving motor mounted on a support frame, a missing gear on the output shaft of the driving motor, and a fixed rack that meshes with the missing gear on the hydraulic push rod.

[0011] Furthermore, the support frame is slidably provided with contact plates that are spaced apart from the slide plate. The two ends of the compression spring are respectively connected to the support frame and the contact plates, and the slide plate and the contact plates abut and overlap.

[0012] Furthermore, the frame is equipped with a running switch, a controller, four stop switches, and four triggering mechanisms. The running switch and the stop switches are electrically connected to the controller, the controller is electrically connected to the fixed motor, and the triggering mechanisms are in contact with the moving frame and the stop switches.

[0013] Furthermore, the triggering mechanism includes a trigger rod slidably mounted on the frame, a conical block mounted on the trigger rod, a return spring mounted between the conical block and the frame, the conical block and the moving frame in contact, and the trigger rod and the stop switch in contact.

[0014] The beneficial effects of the present invention are as follows: When conducting strength testing of elevator landing doors, the present invention can apply static load and instantaneous impact force to the center of the door panel and a quarter width from the door edge, simulating the forces that may be generated by passengers leaning on the door, luggage or trolley impacts, etc., and realize a five-point dual testing method, making the test results more comprehensive and accurate. It can fully evaluate the overall safety performance of the landing door when facing complex impacts in actual use, and therefore is more practical. Attached Figure Description

[0015] Figure 1 is a perspective view of the structure of the present invention; Figure 2 is a partial perspective view of the structure of the present invention; Figure 3 is a perspective sectional view of Figure 2 of the present invention; Figure 4 is an enlarged view of point A in Figure 3 of the present invention; Figure 5 is another perspective view of the structure of the present invention; Figure 6 is yet another perspective view of the structure of the present invention; Figure 7 is an enlarged view of point B in Figure 6 of the present invention; Figure 8 is yet another perspective view of the structure of the present invention; Figure 9 is a perspective sectional view of Figure 8 of the present invention; Figure 10 is an enlarged view of point C in Figure 9 of the present invention.

[0016] Reference numerals: 1. Frame; 2. Bottom slide rail; 3. Top slide rail; 4. Support frame; 5. Top plate; 6. Slide plate; 7. Compression spring; 8. Hydraulic push rod; 9. Detection block; 10. Groove; 11. Roller; 12. Limit frame; 13. Cylinder push rod; 14. Limit block; 15. Lead screw; 16. Drive motor; 17. Drive block; 18. Sprocket; 19. Fixed motor; 20. Chain; 21. Electromagnet; 22. Limit rod; 23. Compression spring; 24. Drive motor; 25. Gear missing; 26. Fixed rack; 27. Contact plate; 28. Run switch; 29. ​​Controller; 30. Stop switch; 31. Trigger rod; 32. Conical block; 33. Return spring. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] As shown in Figures 1-10, an embodiment of the present invention provides an elevator landing door strength testing device, comprising a frame 1. The frame 1 is equipped with a bottom slide rail 2, a top slide rail 3, a limiting mechanism, a driving mechanism, two support frames 4, and a driving component. The bottom slide rail 2 and the top slide rail 3 are both horizontal and fixed to the frame 1. Both the bottom slide rail 2 and the top slide rail 3 are constructed with U-shaped grooves for door panel sliding. Top plates 5 are provided at both ends of the top slide rail 3, and the top plates 5 are vertical and fixed to the top slide rail 3. The limiting mechanism is used to limit or release the door panel, and the driving mechanism is used to drive the door panel to slide. One support frame 4 is a fixed frame and is fixed to the frame 1, while the other support frame 4 is a... A movable frame is slidably mounted on the frame 1. A drive unit is used to drive the movable frame to slide along a rectangular track. A slide plate 6 is slidably mounted on the support frame 4, and a compression spring 7 is provided between the two. The slide plate 6 slides in the horizontal direction, and the compression spring 7 is in the horizontal direction. A hydraulic push rod 8 is provided on the slide plate 6. The hydraulic push rod 8 is in the horizontal direction and fixed on the slide plate 6. A detection block 9 with a frustum-shaped structure is provided at the movable end of the hydraulic push rod 8. The detection block 9 is in the horizontal direction and fixed at the movable end of the hydraulic push rod 8. The small end of the detection block 9 faces the door panel. A limiter and a drive unit are provided on the support frame 4. The limiter is used to limit or release the slide plate 6, and the drive unit is used to drive the hydraulic push rod 8 to move in one direction.In the initial state, the slide plate 6 is in its initial position, and is limited by the limiting component. The compression spring 7 is in its natural state, and the movable end of the hydraulic push rod 8 is retracted. In use, the door panel is placed vertically with its bottom in the groove of the bottom slide rail 2. This operation can be performed by a robotic arm or other transfer device. The door panel contacts one of the top plates 5, and the drive mechanism drives the door panel to slide horizontally. During this process, the limiting mechanism first initially limits the door panel, preventing it from sliding further in the previous direction. Then, the limiting mechanism performs a second limiting, preventing the door panel from sliding again. At this time, the top of the door panel is located at the top... The door panel is positioned in the groove of the slide rail 3. Then, a strength test is performed. First, the movable end of the hydraulic push rod 8 corresponding to the fixing frame extends, driving the detection block 9 to contact the door panel and apply a continuous static load to the center of the door panel. After a period of time, the movable end of the hydraulic push rod 8 retracts, driving the detection block 9 away from the center of the door panel. The center of the door panel is then observed for deformation, cracking, or other phenomena. Next, the sliding plate 6 on the fixing frame is released from its limit position by the limiting component. The hydraulic push rod 8 is then driven to move unidirectionally by the driving component, causing the sliding plate 6 to slide together. The compression spring 7 is compressed. When the hydraulic push rod 8 reaches its extreme position... When the position is limited, the drive mechanism disengages, and the compression spring 7 returns to its natural state. Through elastic potential energy, the hydraulic push rod 8 and the sliding plate 6 quickly return to their original positions. The detection block 9 applies a momentary impact force to the center of the door panel, and the center of the door panel is observed again for deformation, cracking, or other phenomena. This allows for a strength test of the door panel's center. Subsequently, the drive mechanism drives the moving frame to slide along a rectangular trajectory. Whenever the moving frame reaches a point one-quarter the width from the door edge, it stops sliding. This process is repeated to perform a strength test at the point one-quarter the width from the door edge. This completes the strength test process. Finally, the test is performed... The limiting mechanism releases the door panel from its limit, and the driving mechanism drives the door panel to slide horizontally until it contacts another top plate 5. Then, the door panel is moved to the bottom exit groove of the bottom slide rail 2. In summary, when conducting strength testing of elevator landing doors, this invention can apply static loads and instantaneous impact forces to the center of the door panel and at a point one-quarter the width from the door edge, simulating forces that may be generated by passengers leaning against it, luggage, or trolley impacts. This achieves a five-point dual-detection method, making the test results more comprehensive and accurate. It can fully assess the overall safety performance of the landing door under complex impacts in actual use, thus making it more practical.

[0019] As shown in Figure 4, a further technical solution of the present invention is disclosed. Both the bottom slide rail 2 and the top slide rail 3 are constructed with multiple grooves 10. The multiple grooves 10 are evenly distributed in the horizontal direction and are all connected to the slide groove. Rollers 11 are rotatably arranged in the grooves 10, and the axis of the rollers 11 is in the horizontal direction. Referring to the above, when the door panel slides horizontally, it will contact the multiple rollers 11. Through the rolling contact action of the multiple rollers 11, not only can friction be reduced, making the sliding of the door panel smoother, but also the wear on the bottom slide rail 2 and the top slide rail 3 can be reduced.

[0020] Figure 5 shows the specific structure of the limiting mechanism of the present invention. The limiting mechanism includes a limiting frame 12 slidably mounted on a frame 1. The limiting frame 12 slides horizontally. A cylinder push rod 13 with its movable end connected to the limiting frame 12 is mounted on the frame 1. The cylinder push rod 13 is horizontal and fixed on the frame 1. The limiting frame 12 is provided with multiple limiting blocks 14 of different lengths. All the limiting blocks 14 are horizontal and fixed on the limiting frame 12. In this embodiment, there are four limiting blocks 14 arranged in a rectangular array. Two of the limiting blocks 14 are longer and located on the same side, while the other two are shorter and located on the other side. Referring to the above, in the initial state, the movable end of the cylinder push rod 13 extends out, the limiting frame 12 is in the middle position, and the two... The longer limiting block 14 blocks the sliding path of the door panel. When the door panel slides horizontally, one side will abut against the two longer limiting blocks 14 to achieve initial limiting of the door panel, preventing the door panel from continuing to slide in the previous direction. Then, the movable end of the cylinder push rod 13 is fully extended, driving the limiting frame 12 to slide from the middle position to the limit position. The two longer limiting blocks 14 continue to block the door panel, and the two shorter limiting blocks 14 abut against the other side of the door panel. At this time, the door panel cannot slide, thus achieving secondary limiting of the door panel. Conversely, the movable end of the cylinder push rod 13 is fully retracted, driving the limiting frame 12 to slide from the limit position to the initial position. All four limiting blocks 14 are away from the door panel, allowing the door panel to slide horizontally, thus releasing the door panel from the limiting position.

[0021] Figure 4 shows the specific structure of the drive mechanism of the present invention. The drive mechanism includes a lead screw 15 rotatably mounted on a frame 1, the axis of which is horizontal. A drive motor 16, connected to the lead screw 15 and with an output shaft, is mounted on the frame 1. The drive motor 16 is horizontal and fixed on the frame 1. A drive block 17, threadedly engaged with the lead screw 15, is slidably mounted on the frame 1. The drive block 17 is U-shaped and slides horizontally. Referring to the above, in the initial state, the drive block 17 is located in the initial position. In use, the drive motor 16 is turned on, the output shaft rotates forward, driving the lead screw 15 to rotate together. The drive block 17 will slide due to the thread action. The drive block 17 contacts the door panel and pushes the door panel to slide horizontally. When the door panel is limited by the limiting mechanism, the drive motor 16 stops working, the lead screw 15 stops rotating, and the drive block 17 stops sliding. When the drive mechanism releases the door panel from the limit, the drive motor 16 continues to work, the lead screw 15 continues to rotate, and the drive block 17 pushes the door panel to continue sliding, thus driving the door panel to slide.

[0022] As shown in Figure 6, the specific structure of the driving component of the present invention is disclosed. The driving component includes four sprockets 18 that are rotatably mounted on the frame 1 and distributed in a rectangular shape. The axes of the sprockets 18 are horizontal. A fixed motor 19 is mounted on the frame 1, with an output shaft connected to one of the sprockets 18. The fixed motor 19 is horizontal and fixed on the frame 1. A chain 20 is wound around the four sprockets 18. The movable frame is connected to the chain 20, and the movable frame and the chain 20 are fixedly connected. Referring to the above, in use, the fixed motor 19 is turned on, the output shaft rotates, and one of the sprockets 18 and the chain 20 rotate together. The chain 20 drives the other three sprockets 18 to rotate together. When the chain 20 rotates, it drives the movable frame to slide along a rectangular trajectory. When the movable frame is at a distance of one-quarter of the width from the door edge, the fixed motor 19 stops working, and the movable frame stops sliding.

[0023] Figure 10 shows the specific structure of the limiting member of the present invention. The limiting member includes an electromagnet 21 mounted on a support frame 4. The electromagnet 21 is fixedly mounted on the support frame 4. A limiting rod 22 is slidably mounted on the support frame 4, and a compression spring 23 is provided between the two. The sliding direction of the limiting rod 22 is perpendicular to the sliding direction of the slide plate 6. The two ends of the compression spring 23 are fixedly connected to the limiting rod 22 and the support frame 4, respectively. One end of the limiting rod 22 abuts against the slide plate 6, and the other end is magnetically attracted to the electromagnet 21. Referring to the above, in the initial state, the electromagnet 21... When the power is off, the limiting rod 22 is in its initial position with one end in contact with the slide plate 6, and the compression spring 23 is in its natural state. Due to the obstruction of the limiting rod 22, the slide plate 6 cannot slide, thus limiting the slide plate 6. In use, the electromagnet 21 is energized to generate magnetic force. Through the magnetic attraction, the limiting rod 22 is driven to slide to its limit position, the compression spring 23 is stretched, one end of the limiting rod 22 moves away from the slide plate 6, and the other end is in contact with the electromagnet 21. At this time, due to the removal of the obstruction of the limiting rod 22, the slide plate 6 can slide, thus releasing the slide plate 6 from the limit.

[0024] Figure 8 shows the specific structure of the driving component of the present invention. The driving component includes a driving motor 24 mounted on a support frame 4. The driving motor 24 is fixed on the support frame 4. A missing gear 25 is provided on the output shaft of the driving motor 24. The missing gear 25 is coaxially fixed on the output shaft of the driving motor 24. A fixed rack 26 that meshes with the missing gear 25 is provided on the hydraulic push rod 8. The fixed rack 26 is horizontal and fixed on the hydraulic push rod 8. Referring to the above, in the initial state, the missing gear 25... The hydraulic push rod 8 is not engaged with the fixed rack 26 and is in the initial position. When in use, the drive motor 24 is activated, and the output shaft rotates one revolution, driving the missing gear 25 to rotate together. During this process, the missing gear 25 first engages with the fixed rack 26, and through the engagement, it drives the fixed rack 26 and the hydraulic push rod 8 to move together to the limit position. After that, the missing gear 25 and the fixed rack 26 disengage, and the hydraulic push rod 8 moves back to the initial position due to elastic potential energy, so as to realize the unidirectional movement of the hydraulic push rod 8.

[0025] As shown in Figure 8, a further technical solution of the present invention is disclosed. Abutment plates 27, spaced apart from the slide plate 6, are slidably disposed on the support frame 4. The abutment plates 27 slide horizontally. Both ends of the compression spring 7 are connected to the support frame 4 and the abutment plates 27 respectively, and are fixedly connected to the support frame 4 and the abutment plates 27 respectively. The slide plate 6 and the abutment plates 27 abut and overlap. Referring to the above, in the initial state, the compression spring 7 is in its natural state, and both the slide plate 6 and the abutment plates 27 are in their initial positions and spaced apart. When the slide plate 6 slides to… At the extreme position, it will contact and overlap with the abutment plate 27, forcing the abutment plate 27 to slide to the extreme position. The abutment plate 27 will compress the compression spring 7. When the driving component releases the hydraulic push rod 8, the compression spring 7 will return to its natural state. The abutment plate 27 and the slide plate 6 will quickly return to their original positions due to elastic potential energy. Afterward, the slide plate 6 and the abutment plate 27 will maintain a distance. When the detection block 9 applies a momentary impact force to the door panel, the slide plate 6 will slide a certain distance due to the recoil force. During this time, the recoil force will be offset by friction, thus preventing the detection block 9 from causing a secondary impact on the door panel.

[0026] As shown in Figures 6 and 7, a further technical solution of the present invention is disclosed. A running switch 28, a controller 29, four stop switches 30, and four triggering mechanisms are provided on the frame 1. The running switch 28, controller 29, and stop switches 30 are all fixed on the frame 1. The running switch 28 and stop switches 30 are electrically connected to the controller 29, and the controller 29 is electrically connected to the fixed motor 19. The triggering mechanisms, the moving frame, and the stop switches 30 are all in contact with each other. Referring to the above, in the initial state, the moving frame is in its initial position, and the triggering mechanisms, the moving frame, and the stop switches 30 are not in contact with each other. In use, pressing the running switch 28 will activate the signal. The signal is transmitted to the controller 29, which controls the fixed motor 19 to run, driving the movable frame to slide along a rectangular track. When the movable frame is at a distance of one-quarter of the width from the door edge, it will contact the trigger mechanism, which in turn contacts the stop switch 30. The stop switch 30 transmits a closing signal to the controller 29, which then controls the fixed motor 19 to stop moving, and the movable frame stops sliding, thus achieving automatic positioning of the movable frame and making it more convenient to use. In this embodiment, the model of the run switch 28 is a Mitsubishi FX3S series RUN terminal, the model of the controller 29 is a Mitsubishi FX3S series PLC, and the model of the stop switch 30 is 216525 M22-PV / KC11 / IY.

[0027] As shown in Figure 7, the specific structure of the triggering mechanism of the present invention is disclosed. The triggering mechanism includes a trigger rod 31 slidably disposed on the frame 1. The sliding direction of the trigger rod 31 is perpendicular to the sliding direction of the slide plate 6. A conical block 32 is disposed on the trigger rod 31. The conical block 32 is fixed on the trigger rod 31, and the two form a stepped structure. A return spring 33 is disposed between the conical block 32 and the frame 1. The return spring 33 is sleeved on the trigger rod 31, and its two ends are fixedly connected to the conical block 32 and the frame 1, respectively. The conical block 32 abuts against the moving frame, and the trigger rod 31 abuts against the stop switch 30. Referring to the above, in the initial state... In the initial state, both the trigger rod 31 and the cone block 32 are in their initial positions. The trigger rod 31, the moving frame, and the stop switch 30 are not in contact. The return spring 33 is in its natural state. When the moving frame is at a distance of one-quarter of the door edge, it will contact the cone block 32. Through the transition effect of the inclined plane, the trigger rod 31 and the cone block 32 are forced to move together to the limit position. The return spring 33 is compressed, and the trigger rod 31 and the stop switch 30 contact each other. Conversely, when the moving frame slides away from the cone block 32, the return spring 33 returns to its natural state, and the trigger rod 31 and the cone block 32 move together to the initial position.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for testing the strength of elevator landing doors, characterized in that, The device includes a frame (1), on which a bottom slide rail (2), a top slide rail (3), a limiting mechanism, a driving mechanism, two support frames (4), and a driving component are provided. Both ends of the top slide rail (3) are provided with top plates (5). The limiting mechanism is used to limit or release the door panel, and the driving mechanism is used to drive the door panel to slide. One of the support frames (4) is a fixed frame and is fixed on the frame (1), and the other support frame (4) is a movable frame and is slidably set on the frame (1). The driving component is used to drive the movable frame to slide along a rectangular track. A slide plate (6) is slidably set on the support frame (4), and a compression spring (7) is set between the two. A hydraulic push rod (8) is set on the slide plate (6). The movable end of the hydraulic push rod (8) is provided with a detection block (9) with a frustum-shaped structure. The support frame (4) is provided with a limiting component and a driving component. The limiting component is used to limit or release the slide plate (6), and the driving component is used to drive the hydraulic push rod (8) to move in one direction.

2. The elevator landing door strength testing device according to claim 1, characterized in that, Both the bottom slide rail (2) and the top slide rail (3) are constructed with multiple grooves (10), and rollers (11) are rotatably arranged in the grooves (10).

3. The elevator landing door strength testing device according to claim 1, characterized in that, The limiting mechanism includes a limiting frame (12) that is slidably mounted on the frame (1). The frame (1) is provided with a cylinder push rod (13) whose movable end is connected to the limiting frame (12). The limiting frame (12) is provided with a plurality of limiting blocks (14) of different lengths.

4. The elevator landing door strength testing device according to claim 1, characterized in that, The drive mechanism includes a lead screw (15) rotatably mounted on a frame (1), a drive motor (16) with an output shaft connected to the lead screw (15) is mounted on the frame (1), and a drive block (17) that is threadedly engaged with the lead screw (15) is slidably mounted on the frame (1).

5. The elevator landing door strength testing device according to claim 1, characterized in that, The driving component includes four sprockets (18) that are rotatably mounted on the frame (1) and arranged in a rectangular shape. The frame (1) is provided with a fixed motor (19) connected to an output shaft and one of the sprockets (18). A chain (20) is wound around the four sprockets (18). The moving frame is connected to the chain (20).

6. The elevator landing door strength testing device according to claim 1, characterized in that, The limiting component includes an electromagnet (21) mounted on a support frame (4), a limiting rod (22) is slidably mounted on the support frame (4) and a compression spring (23) is provided between the two, one end of the limiting rod (22) abuts against the sliding plate (6) and the other end is magnetically attracted to the electromagnet (21).

7. The elevator landing door strength testing device according to claim 1, characterized in that, The driving component includes a driving motor (24) mounted on a support frame (4), a missing gear (25) is mounted on the output shaft of the driving motor (24), and a fixed rack (26) that meshes with the missing gear (25) is mounted on the hydraulic push rod (8).

8. The elevator landing door strength testing device according to claim 1, characterized in that, The support frame (4) is slidably provided with contact plates (27) spaced apart from the slide plate (6). The two ends of the compression spring (7) are connected to the support frame (4) and the contact plates (27) respectively. The slide plate (6) and the contact plates (27) abut against each other.

9. The elevator landing door strength testing device according to claim 5, characterized in that, The frame (1) is equipped with a running switch (28), a controller (29), four stop switches (30) and four triggering mechanisms. The running switch (28) and the stop switches (30) are electrically connected to the controller (29). The controller (29) is electrically connected to the fixed motor (19). The triggering mechanisms, the moving frame and the stop switches (30) are all in contact with each other.

10. The elevator landing door strength testing device according to claim 9, characterized in that, The triggering mechanism includes a trigger rod (31) slidably mounted on the frame (1), a conical block (32) is mounted on the trigger rod (31), a reset spring (33) is mounted between the conical block (32) and the frame (1), the conical block (32) and the moving frame are in contact, and the trigger rod (31) and the stop switch (30) are in contact.

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