A torque limiter testing device

Abstract

The utility model relates to a kind of torque limiter testing device, including detection platform, the vertical installation frame of top surface center of detection platform, the top end side wall of installation frame is equipped with through-hole, and adjustable assembly is movably installed in through-hole inside, the center of adjustable assembly is also equipped with force arm, one end of force arm is equipped with counterweight, and the side close to counterweight of force arm is also equipped with angle sensor, the other end of force arm extends to rear and is equipped with automatic positioning assembly in end portion, and the top surface of detection platform is also equipped with conveying assembly;The utility model is matched with the arc-shaped groove of connecting plate using conveying belt, the batch ordered conveying of torque limiter is realized, cooperation detection platform bottom movable cylinder and V-shaped groove connecting seat, torque limiter can be vertically accurately jacked to the gap of automatic positioning assembly, without manual handling and alignment, completely replace traditional manual plug-in operation, adapt to large-scale batch production detection needs.

Description

Technical Field

[0001] This utility model relates to the technical field of torque limiter testing equipment, and specifically to a torque limiter testing device. Background Technology

[0002] As a core safety protection component in lifting machinery and engineering equipment, the reliability of torque limiters directly affects the operational safety and precision of the equipment. Key performance parameters such as angle detection error and load response threshold must be verified using specialized testing equipment to ensure accurate monitoring of the equipment's torque status after delivery, preventing structural damage or safety accidents caused by overload. With the increasing demands for industrial automation and mass production, traditional torque limiter testing equipment has gradually revealed problems such as poor adaptability, low testing efficiency, and insufficient accuracy and stability, making it difficult to meet the modern industrial requirements for efficient and intelligent testing processes. Specific technical pain points are as follows: Traditional torque limiter testing devices often employ fixed fixture structures, where the connection between the lever arm and the torque limiter relies on manual insertion / removal or bolt tightening. Operators must align each torque limiter with the lever arm's end interface and tighten the bolts with a wrench to complete the fixation. A single installation can take 3-5 minutes, and disassembly requires repeated loosening and unloosening of bolts. For batch scenarios with daily testing volumes exceeding 100 pieces, manual operation is not only inefficient but also prone to uneven installation force and alignment deviations, leading to excessive coaxiality between the lever arm and the torque limiter, which in turn causes distortion in angle testing data and affects test accuracy. Furthermore, fixed fixtures are only compatible with a single specification of torque limiter. When testing products of different sizes and interface types, the entire fixture must be replaced, and the relative positions of the lever arm and the shaft must be recalibrated, further increasing testing costs and time.

[0003] In terms of automation integration and data linkage, the traditional testing equipment has independent processes for conveying, installing and testing: the torque limiter to be tested needs to be manually moved to the testing station, and during the testing process, data such as angle and torque need to be manually recorded and then manually entered into the display for result analysis. This not only makes it easy for data recording errors to occur, but also makes it impossible to achieve a fully automated closed loop of "conveyance-installation-testing-sorting".

[0004] Therefore, there is an urgent need to develop a torque limiter testing device with automatic conveying and positioning, high-precision lever arm adjustment, and stable electrical connection functions to meet the needs of batch testing, while ensuring testing accuracy and operational safety, and promoting the development of torque limiter testing technology towards automation and intelligence. Utility Model Content

[0005] Based on the above description, this utility model provides a torque limiter testing device to solve the problems of existing lidar in terms of heat dissipation schemes, such as the contradiction between high power density and miniaturization, the conflict between heat dissipation efficiency and sealing protection, and insufficient structural compatibility and environmental adaptability.

[0006] This utility model is achieved through the following technical solution: A torque limiter testing device includes a testing platform. A mounting frame is vertically arranged at the center of the top surface of the testing platform. A through hole is opened on the top side wall of the mounting frame, and an adjustment component is movably installed inside the through hole. A lever arm is also provided at the center of the adjustment component. A counterweight is provided at one end of the lever arm, and an angle sensor is also provided on the side of the lever arm near the counterweight. The other end of the lever arm extends backward and has an automatic positioning component at its end. A conveying component is also provided on the top surface of the testing platform. Multiple torque limiters are arranged at intervals on the conveying component, and the torque limiters are sequentially conveyed into the automatic positioning component.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the adjustment assembly includes ball bearings disposed at both ends of the through hole, and the inner ring of the ball bearing is fixedly mounted with a rotating shaft via a spline structure. The rotating shaft is fixedly connected to the lever arm, and the outer ring of the ball bearing is fixedly connected to the inner wall of the through hole. One end of the rotating shaft extends to the end face of the mounting bracket and is provided with a worm gear on the outer side wall. A hydraulic motor is fixedly mounted on the side wall of the mounting bracket via a motor base. The output end of the hydraulic motor extends downward and is connected to a worm gear, which meshes with the worm gear.

[0009] Furthermore, the automatic positioning component includes a limiting seat disposed on the end face of the lever arm. The limiting seat is arranged in a ring structure and has a notch on its downward side. The notch is connected to the central hole of the limiting seat. An electronic lock is also provided at the notch. The electronic lock unfolds outward in an arc shape and forms a complete ring with the limiting seat.

[0010] Furthermore, a limiting groove is provided on the inner ring surface of the limiting seat, and an airbag is embedded in the limiting groove. The airbag expands outward and fits tightly against the outer wall of the torque limiter. Multiple airbags are interconnected and connected to an external air pump through an air supply pipe.

[0011] Furthermore, a pressure sensor is also provided on the surface of the airbag.

[0012] Furthermore, the conveying assembly includes a conveyor belt arranged longitudinally above the testing platform. The conveyor belt is provided with several connecting plates. Each connecting plate has a hollowed-out center and arc-shaped grooves at both ends. The two ends of the torque limiter overlap the bottom surface of the arc-shaped grooves and the main body is located in the hollowed-out area.

[0013] Furthermore, the bottom of the testing platform is also equipped with a movable cylinder, the top of the movable cylinder is equipped with a connecting seat, the center of the top surface of the connecting seat is provided with a V-shaped groove, and the connecting seat is located directly below the hollow part of the connecting plate.

[0014] Furthermore, the inner ring surface of the limiting seat is also provided with a spraying seat, and the end face of the spraying seat facing the center is provided with a spray hole, and the spraying seat also stores pigment.

[0015] Furthermore, an electric telescopic rod is embedded on the end face of both ends of the limiting seat, and a positioning plate is connected to the end of the electric telescopic rod. A conductive connector is fixedly installed at the center of the end face of the positioning plate. When the electric telescopic rod retracts, the positioning plate is tightly fitted with the end face of the limiting seat, and the conductive connector extends horizontally and is electrically connected to both ends of the torque limiter.

[0016] Furthermore, the testing platform is also equipped with a display, which is electrically connected to an electrical connector and an angle sensor via wires.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This application improves upon existing torque limiter testing equipment by using a conveyor belt and an arc-shaped groove in the connecting plate to achieve batch and orderly conveying of torque limiters. With the help of the movable cylinder at the bottom of the testing table and the V-groove connecting seat, the torque limiter can be vertically and accurately lifted into the notch of the automatic positioning component without the need for manual handling and alignment, completely replacing the traditional manual insertion and removal operation, and adapting to the needs of large-scale batch production testing. 2. In this application, the airbag body can be adapted to torque limiters of different diameters (e.g., 50-100mm) through pressure adjustment. The arc-shaped groove and V-shaped groove connecting seat of the connecting plate can be compatible with products of different lengths. Multi-specification testing can be completed without changing the fixture. The airbag bodies in the inner ring of the limit seat are interconnected. After inflation, they are evenly attached to the outer wall of the torque limiter, which can automatically correct the coaxiality deviation and achieve precise centering. It can also eliminate the gap of mechanical fixation through flexible wrapping. With the help of a pressure sensor to monitor the airbag pressure in real time, it can ensure that the fixing force is consistent each time and avoid torque transmission distortion caused by uneven fixation, effectively reducing the coaxiality deviation between the lever arm and the torque limiter. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the entire testing device in this embodiment; Figure 2 This is a front view of the detection device in this embodiment; Figure 3 This is a schematic diagram of the conductive connector in this embodiment; Figure 4 This is a partial structural diagram of the conveying component in this embodiment; Labels: 1. Testing table; 2. Mounting frame; 3. Adjustment assembly; 31. Ball bearing; 32. Rotary shaft; 33. Hydraulic motor; 34. Worm gear; 35. Worm; 4. Automatic positioning assembly; 41. Limit seat; 42. Electronic lock; 43. Airbag body; 44. Electric telescopic rod; 45. Conductive connector; 5. Conveying assembly; 51. Conveyor belt; 52. Movable cylinder; 53. Connecting plate; 6. Counterweight; 7. Angle sensor; 8. Lever arm. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, 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 belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] Combination Figure 1-4 As shown, a torque limiter testing device includes: Test stand 1 serves as the bottom support foundation for the entire testing device and is fixed to the ground or a designated platform by anchor bolts, ensuring that its top surface is horizontal. Mounting bracket 2 is vertically set at the center of the testing table 1, and has a through hole at the top center, which is used to flexibly assemble with lever arm 8; Adjustment component 3 is mounted on mounting bracket 2 and is connected to lever arm 8 via transmission. It is used to actively adjust the tilt angle of lever arm 8, thereby measuring the angle detection effect of torque limiter. Automatic positioning component 4 is located at the tail end of lever arm 8 to assist in the quick installation of torque limiter, so as to ensure the stability of torque limiter and reduce detection error; The conveying component 5 is located on the top surface of the testing table 1 and below the lever arm 8. Through continuous conveying, it works with the automatic positioning component 4 to quickly switch the torque limiter, thereby improving the testing efficiency.

[0022] Specifically, in this embodiment, the testing equipment is mainly suitable for testing torque limiters with a single specification and a large batch size. Therefore, in this structure, the conveying component 5 should be a conveyor belt 51 arranged longitudinally above the testing table 1, and several connecting plates 53 should be provided on the conveyor belt 51—a chain plate type conveyor belt 51, or a mold for preliminary positioning of the torque limiter can be directly provided above a conventional conveyor belt 51. Each connecting plate 53 has a hollowed-out center and arc-shaped grooves at both ends, for example, attached Figure 4 As shown, the torque limiter ensures that it can be placed horizontally by means of the curved surface and the length of the adapted curved groove.

[0023] In addition, when the two ends of the torque limiter overlap the bottom surface of the arc-shaped groove, its main body should be positioned exactly at the hollowed-out area. The top surface of the testing table 1 is also equipped with a movable cylinder 52. The top of the movable cylinder 52 is fixed with a connecting seat. The top surface of the connecting seat is also provided with a V-shaped groove, ensuring that the connecting seat is smaller than the hollowed-out area of ​​the connecting plate 53 and is aligned vertically with the torque limiter. Therefore, when the conveyor belt 51 is conveyed to the designated position (using step conveying and positioning it directly below the lever arm 8), the movable cylinder 52 lifts upwards to position the torque limiter in the V-shaped groove until it is lifted into the automatic positioning component 4 at the end of the lever arm 8, thereby fixing it and completing the single installation.

[0024] This structure eliminates the need for manual handling and alignment, completely replacing traditional manual insertion and removal operations. The time required for a single positioning is reduced to within 10 seconds, and the inspection capacity per hour is increased to more than 360 pieces, making it suitable for large-scale batch production and inspection needs.

[0025] The automatic positioning component 4 includes a limiting seat 41 disposed on the end face of the lever arm 8. The limiting seat 41 is arranged in a ring structure and has a notch on the downward side. The notch is connected to the central hole of the limiting seat 41. An electronic lock 42 is also provided at the notch. The electronic lock 42 unfolds outward in an arc shape and forms a complete ring with the limiting seat 41. Therefore, when the torque limiter passes through the notches at both ends and is inside the limiting seat 41, the electronic lock 42 is quickly activated, thereby positioning the two ends of the torque limiter. At this time, when the movable cylinder 52 retracts downward, the torque limiter will still remain inside the limiting seat 41 for subsequent detection work.

[0026] In addition, a limiting groove is provided on the inner ring surface of the limiting seat 41, and an airbag 43 is embedded in the limiting groove. The airbag 43 expands outward and fits tightly against the outer wall of the torque limiter. Multiple airbags 43 are interconnected and connected to an external air pump through an air supply pipe. When the torque limiter is positioned and locked inside the limiting seat 41, the airbag 43 expands rapidly and, through compression, the torque sensor can be fixed inside the limiting seat 41. Furthermore, this flexible clamping structure can not only be adapted to torque limiters of various sizes through pressure adjustment, but also prevent the torque limiter from shifting when the lever arm 8 rotates and generates centrifugal force.

[0027] Furthermore, a pressure sensor should be installed on the outer wall of the airbag body 43 to monitor the compressive force of the airbag body 43 in real time, so as to avoid excessive pressure from damaging the torque sensor.

[0028] Meanwhile, an electric telescopic rod 44 is also embedded on the end face of the limit seat 41 at both ends, and a positioning plate is connected to the end of the electric telescopic rod 44. A conductive connector 45 is fixedly installed at the center of the end face of the positioning plate. When the electric telescopic rod 44 retracts, the airbag 43 is continuously squeezed by the arc surface, so that the torque sensor is positioned and fixed at the center. Then the positioning plate is tightly attached to the end face of the limit seat 41, and the conductive connector 45 can extend in the horizontal direction and be electrically connected to both ends of the torque limiter, thereby realizing "flexible fixing + centering adjustment + electrical connection" in one click, which greatly reduces the installation and debugging time.

[0029] The adjusting assembly 3 includes ball bearings 31 disposed at both ends of the through hole. The inner ring of the ball bearings 31 is fixedly mounted with a rotating shaft 32 via a spline structure. The rotating shaft 32 is fixedly connected to the lever arm 8 and serves as a fulcrum. The outer ring of the ball bearings 31 is fixedly connected to the inner wall of the through hole. One end of the rotating shaft 32 extends to the end face of the mounting bracket 2 and has a worm gear 34 on its outer side wall. A hydraulic motor 33 is fixedly mounted on the side wall of the mounting bracket 2 via a motor base. The output end of the hydraulic motor 33 extends horizontally and is connected to a worm gear 35. The worm gear 35 meshes with the worm gear 34. This adjusting structure not only has smooth transmission and small gaps, but also has a reverse self-locking characteristic. The rotation angle adjustment accuracy of the lever arm 8 can reach ±0.05°, effectively avoiding the offset problem of traditional gear transmission.

[0030] An angle sensor 7 is also provided at the end of the lever arm 8 away from the torque sensor, and a counterweight 6 is provided at the end. The angle sensor 7 can collect data in real time and transmit it to the display to form a standard angle reference, which can accurately compare the angle detection error of the torque limiter and has strong traceability of test accuracy.

[0031] In addition, to facilitate the sorting and recycling of torque limiters on conveyor belt 51 (qualified and defective products) by staff after inspection, a spraying seat can be set on the inner ring surface of the limit seat 41, and a spray hole is provided on the end face of the spraying seat facing the center direction, and the spraying seat also stores pigment.

[0032] The automated detection steps for the above structure are as follows: Preparation before testing 1. Check the status of the device: Turn on the power of the test bench 1 and confirm that the hydraulic motor 33, conveyor belt 51, movable cylinder 52, electronic lock 42, air bag body 43 and other components are operating normally, without jamming, abnormal noise or air leakage; check the display to see if the angle sensor 7 and pressure sensor data are zeroed, the conductive connector 45 is in good contact, and the paint on the spraying seat is sufficient.

[0033] 2. Prepare standard accessories: Select a standard counterweight 6 with a known weight (accuracy ±0.01kg) and fix it to the mounting position at one end of the lever arm 8, ensuring that the bolts are tight and not loose; according to the specifications of the torque limiter to be tested, confirm that the arc groove of the connecting plate 53 and the V-groove connecting seat are compatible and there is no dimensional interference.

[0034] 3. Parameter preset: Input the rated parameters of the torque limiter under test (such as range, permissible error), the weight of the standard counterweight 6 and the effective length of the lever arm 8 into the display, set the inflation pressure of the airbag 43 (0.8-1.2MPa), the preset rotation angle of the lever arm 8 (such as 0°, 30°, 60°, 90°) and the number of test cycles.

[0035] Inspection of parts loading and positioning 1. Batch loading: Place multiple torque limiters to be inspected on the connecting plate 53 of the conveyor belt 51 in a uniform posture (with the wiring end facing the positioning plate). The two ends of the torque limiter overlap in the arc-shaped groove, and the main body is embedded in the hollow part to ensure that the posture is stable and without deviation.

[0036] 2. Precise conveying: Start the conveyor belt 51 to convey the first torque limiter to be inspected to the inspection station (directly above the V-groove connecting seat). The conveyor belt 51 will automatically stop after triggering the limit switch (positioning equipment such as laser positioning instrument (Keyence LK-G80, accuracy ±0.5μm) can be used for auxiliary distance measurement to ensure precise alignment).

[0037] 3. Vertical lifting: The movable cylinder 52 (SMC MGPM series) is activated, the top connecting seat rises, and the V-groove lifting torque limiter is vertically lifted until the torque limiter enters the notch of the limit seat 41 and the bottom is in contact with the positioning step of the limit seat 41. The cylinder stops rising and remains in position.

[0038] 4. Mechanical fixing and centering: When the electronic lock 42 receives the positioning signal, the arc-shaped lock tongue unfolds outward and forms a complete ring with the limit seat 41. It is inserted into the lock hole of the torque limiter to complete the axial anti-disengagement. The airbag 43 inflates and expands, evenly conforming to the outer wall of the torque limiter, automatically correcting the coaxiality deviation. The inflation stops after the pressure sensor feedback that the pressure has reached the standard.

[0039] 5. Electrical connection: When the electric telescopic rod 44 retracts, the drive positioning plate and the end face of the limit seat 41 are in contact, the conductive connector 45 is precisely connected to both ends of the torque limiter, the display shows "connection successful", and the test stage begins.

[0040] Angle and gravity synchronous detection 1. Reference angle detection (0° horizontal position): The hydraulic motor 33 drives the worm gear 35 and worm wheel 34 to rotate the lever arm 8 to the 0° horizontal position. The angle sensor 7 locks the current angle value and transmits it to the display. The system automatically calculates the weight (G=mg) and theoretical torque of the counterweight 6, and simultaneously collects the weight detection value and angle detection value of the torque limiter and records them on the display.

[0041] 2. Multi-angle dynamic detection: Drive the boom to rotate sequentially according to preset angles. After each angle, the hydraulic motor 33 is self-locked and fixed. After the data from the angle sensor 7 stabilizes (fluctuation ≤ ±0.1° for 3 consecutive seconds), the gravity component detection value and angle detection value at that angle are collected. During this period, the pressure of the airbag 43 is monitored in real time. If the pressure drops by more than 0.05MPa, the airbag is automatically replenished and recorded.

[0042] 3. Data comparison and analysis: The display automatically compares the error between the "standard value and the detected value" at each angle, calculates the absolute error and relative error, and determines whether it is within the allowable range; it also verifies the dynamic response speed of the torque limiter and records the time taken to switch from angle to data stability.

[0043] Comprehensive performance verification 1. Repeatability test: Repeat the "angle switching - data acquisition" process according to the preset number of cycles to verify the repeatability of the test data of the same torque limiter in different cycles. The deviation must be ≤ ±0.5%.

[0044] 2. Electrical connection reliability test: During the test, a slight vibration interference is simulated on the display (or a momentary power outage and power restoration is triggered), and the connection between the torque limiter and the conductive connector 45 is observed to be stable, with no data interruption or false triggering.

[0045] 3. Overload simulation test (optional): Replace with a heavier standard counterweight 6 (e.g., 120% of the rated load), rotate lever arm 8 to 30°, and test whether the torque limiter can accurately identify the overload state and whether it triggers the preset alarm or protection mechanism.

[0046] Test Result Judgment and Labeling 1. Result Judgment: After the test is completed, the display generates a comprehensive test report, which includes the angle error, gravity detection error, repeatability and response speed of each angle; if all indicators meet the preset standards, it is judged as "qualified", otherwise it is marked as "unqualified" and the items exceeding the standard are noted.

[0047] 2. Automatic marking: Qualified products trigger the spraying unit to spray markings (such as colored dots) onto the end face of the torque limiter; unqualified products are not marked, which facilitates subsequent sorting.

[0048] 3. Unlocking and unloading: The airbag 43 deflates and retracts, the electronic lock 42 is de-energized and unlocked, and the electric telescopic rod 44 is reset; the movable cylinder 52 descends, putting the torque limiter back into the connecting plate 53, the conveyor belt 51 starts, and the inspected parts are transported to the sorting area. At the same time, the next part to be inspected is transported to the inspection station to enter the next round of inspection.

[0049] During the above process, the entire device automatically cycles through the "feeding-positioning-detection-judgment-unloading" process until all torque limiters to be tested have been tested.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this utility model.

Claims

1. A torque limiter testing device, characterized by, The test platform (1) includes a test stand (1), on which a mounting frame (2) is vertically installed at the center of the top surface. The top side wall of the mounting frame (2) has a through hole, and an adjustment component (3) is movably installed inside the through hole. A lever arm (8) is also provided at the center of the adjustment component (3). One end of the lever arm (8) is provided with a counterweight (6), and an angle sensor (7) is also provided on the side of the lever arm (8) close to the counterweight (6). The other end of the lever arm (8) extends backward and is provided with an automatic positioning component (4) at the end. The top surface of the test platform (1) is also provided with a conveying component (5). Multiple torque limiters are arranged at intervals on the conveying component (5) and the torque limiters are conveyed to the automatic positioning component (4) in sequence.

2. The torque limiter testing device of claim 1, wherein, The adjustment assembly (3) includes ball bearings (31) disposed at both ends of the through hole, and the inner ring of the ball bearings (31) is fixedly mounted with a rotating shaft (32) through a spline structure. The rotating shaft (32) is fixedly connected to the lever arm (8), and the outer ring of the ball bearings (31) is fixedly connected to the inner wall of the through hole. One end of the rotating shaft (32) extends to the end face of the mounting bracket (2) and a worm gear (34) is provided on the outer side wall. The side wall of the mounting bracket (2) is fixedly mounted with a hydraulic motor (33) through a motor seat. The output end of the hydraulic motor (33) extends downward and is connected to a worm (35) for transmission. The worm (35) and the worm gear (34) are engaged in transmission.

3. The torque limiter testing device of claim 2, wherein, The automatic positioning component (4) includes a limiting seat (41) disposed on the end face of the lever arm (8). The limiting seat (41) is arranged in a ring structure and has a notch on the downward side. The notch is connected to the central hole of the limiting seat (41). An electronic lock (42) is also provided at the notch. The electronic lock (42) unfolds outward in an arc shape and forms a complete ring with the limiting seat (41).

4. The torque limiter testing device of claim 3, wherein, The inner ring surface of the limiting seat (41) is also provided with a limiting groove, and an airbag (43) is embedded in the limiting groove. The airbag (43) expands outward and fits tightly against the outer wall of the torque limiter. Multiple airbags (43) are interconnected and connected to an external air pump through an air supply pipe.

5. The torque limiter testing device of claim 4, wherein, The surface of the airbag (43) is also provided with a pressure sensor.

6. The torque limiter testing device of claim 5, wherein, The conveying assembly (5) includes a conveyor belt (51) arranged longitudinally above the testing table (1). The conveyor belt (51) is provided with several connecting plates (53). Each connecting plate (53) has a hollowed-out center and arc-shaped grooves at both ends. The two ends of the torque limiter overlap the bottom surface of the arc-shaped grooves and the main body is located in the hollowed-out area.

7. The torque limiter testing device according to claim 6, characterized in that, The bottom of the testing platform (1) is also provided with a movable cylinder (52), the top of the movable cylinder (52) is provided with a connecting seat, the center of the top surface of the connecting seat is provided with a V-shaped groove, and the connecting seat is located directly below the hollow part of the connecting plate (53).

8. The torque limiter testing device according to claim 7, characterized in that, The inner ring surface of the limiting seat (41) is also provided with a spraying seat, and the end face of the spraying seat facing the center is provided with a spray hole, and the spraying seat also stores pigment.

9. The torque limiter testing device according to claim 8, characterized in that, An electric telescopic rod (44) is also embedded on the end face of the limiting seat (41) at both ends, and the end of the electric telescopic rod (44) is connected to a positioning plate. A conductive connector (45) is fixedly installed at the center of the end face of the positioning plate. When the electric telescopic rod (44) retracts, the positioning plate is tightly fitted to the end face of the limiting seat (41), and the conductive connector (45) extends in the horizontal direction and is electrically connected to both ends of the torque limiter.

10. The torque limiter testing device according to claim 9, characterized in that, The testing station (1) is also equipped with a display, which is electrically connected to the electrical connector and the angle sensor (7) via wires.

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