A hydraulic cylinder loading experiment device

Abstract

The present application relates to a kind of hydraulic cylinder loading experiment device applied to the technical field of hydraulic cylinder loading experiment, including motor drive mechanism and signal processing system, motor drive mechanism includes drive motor housing, drive motor being installed in the inside of drive motor housing, rotating disc being installed in the output end of drive motor, the side of rotating disc is provided with fixed rod A, fixed rod A is rotatably connected with first-stage transmission rod, first-stage transmission rod is hinged with second-stage transmission rod, the end of second-stage transmission rod is provided with pressure sensor, valve assembly is installed at the hydraulic oil inlet of hydraulic cylinder body;Signal processing system includes platform movement module and performance detection module, by the above structure, the method of air pressure detection is used to detect hydraulic cylinder air tightness, since no longer use hydraulic oil, so that experiment table is not easy to be contaminated, and still use the method of pressure monitoring to replace the original detection precision poor visual method, improve the accuracy of detection.

Description

Technical Field

[0001] This invention relates to a loading test apparatus, and more particularly to a hydraulic cylinder loading test apparatus applicable to the field of hydraulic cylinder loading test technology. Background Technology

[0002] Hydraulic cylinders are devices primarily used to convert hydraulic energy into linear motion mechanical energy. To ensure the stability of the hydraulic cylinder's operation, loading tests are required during production and testing. In existing technology, the structure of a hydraulic cylinder is as follows: Figure 1 As shown, the device includes a hydraulic cylinder telescopic rod, one end of which is located inside the hydraulic cylinder body. Hydraulic oil inlet A and hydraulic oil inlet B are respectively located on both sides of the hydraulic cylinder body. Currently, most hydraulic cylinder loading test devices require filling hydraulic oil into hydraulic oil inlet A and hydraulic oil inlet B to test the airtightness of the hydraulic cylinder. This method can lead to hydraulic oil overflow if the hydraulic cylinder has poor airtightness, easily contaminating the test bench. Furthermore, the hydraulic oil needs to be filled repeatedly to expel air from the hydraulic cylinder, resulting in low testing efficiency.

[0003] Chinese invention patent CN202110910386.X discloses a high-pressure leak detection device for hydraulic cylinder barrels. This invention includes a leak detection machine stand, which comprises a protective cover assembly. Inside the protective cover assembly is an auxiliary pad assembly for fixing the cylinder barrel. Inside the leak detection machine stand, and to one side of the auxiliary pad assembly, is a leak detection chamber assembly for detecting leaks in the cylinder barrel. In this invention, the cylinder barrel is placed in the leak detection chamber assembly. Position the fixture on the machine tool, manually close the protective door, press the start button, and the slide will send the positioning fixture and cylinder into the sealing head. The clamping mechanism will press the cylinder tightly, open the water inlet valve, and fill the leak detection chamber assembly with water. Then, open the high-pressure air valve to perform a high-pressure test on the cylinder. The pressure sensor will then check if the pressure is qualified. At the same time, visually inspect whether there are water bubbles in the leak detection chamber assembly. After it is determined to be qualified, the high-pressure compressed air in the cylinder cavity will be emptied, the water level in the leak detection chamber assembly will drop, and all mechanisms will return to their original positions, completing the high-pressure side leak test of the cylinder.

[0004] In conducting the above experiment, air was injected into the hydraulic oil inlet A and hydraulic oil inlet B of the hydraulic cylinder to determine whether the pressure detected by the pressure sensor was qualified. The cylinder barrel was also visually inspected for bubbles in the leak detection chamber assembly. However, the detection accuracy was poor. When the leak point was small, the bubbles coming out of the cylinder barrel were small and difficult to detect with the naked eye. Furthermore, it took a long time for the small bubbles to form larger bubbles that could be observed by the human eye. This resulted in a long observation time for the experimenters, making it easy to miss some leaks and affecting the detection results and efficiency. Summary of the Invention

[0005] The technical problem that this invention aims to solve in view of the above-mentioned prior art is that visual inspection of whether there are bubbles in the cylinder barrel in the leak detection chamber assembly has poor detection accuracy. When the leak point is small, the bubbles coming out of the cylinder barrel are small and difficult to detect with the naked eye. Moreover, it takes a long time for small bubbles to form larger bubbles that can be observed by the human eye, resulting in a long observation time for the experimenter and the possibility of missing some bubbles, which affects the detection results and detection efficiency.

[0006] To address the aforementioned problems, this invention provides a hydraulic cylinder loading experimental device, comprising a motor drive mechanism and a signal processing system. The motor drive mechanism includes a drive motor housing, a drive motor installed inside the drive motor housing, and a rotating disk installed at the output end of the drive motor. A fixed rod A is provided on one side of the rotating disk, and a primary transmission rod is rotatably connected to the fixed rod A. A secondary transmission rod is hinged to the primary transmission rod, and a pressure sensor is provided at the end of the secondary transmission rod. A secondary transmission housing is fitted around the outer ring of the secondary transmission rod. A primary transmission housing is provided at one end of the secondary transmission housing, and an end housing is provided at the other end of the primary transmission housing. A control panel is installed on the outside of the end housing. Valve assemblies are installed at both the hydraulic oil inlet A and hydraulic oil inlet B of the hydraulic cylinder body. The signal processing system includes a platform movement module and a performance detection module. The platform movement module is electrically connected to the control panel, the motor drive platform, and the hydraulic cylinder support platform, respectively. The performance detection module is electrically connected to the pressure sensor and the control panel, respectively.

[0007] In the above-mentioned hydraulic cylinder loading test device, the air pressure detection method is used to test the air tightness of the hydraulic cylinder, and the pressure monitoring method is also used for verification, which improves the accuracy of the device and makes the test platform less susceptible to contamination.

[0008] As a further improvement of this application, the motor drive mechanism is fixed on the motor drive platform, which includes two motor support columns. Each of the two motor support columns has an adjusting gear A at its lower end. The middle part of the adjusting gear A is threadedly connected to the motor support column through a stud. A support plate is provided below the motor support column, and the motor support column is movably inserted into the support column movable hole on the support plate.

[0009] As a further improvement of this application, a vertical adjustment motor A is fixed to the bottom of the support plate. The output end of the vertical adjustment motor A is connected to a drive rod A. Two drive gears A are installed on the drive rod A. Both drive gears A mesh with the adjustment gears A. The platform moving module is electrically connected to the vertical adjustment motor A.

[0010] As a further improvement of this application, the hydraulic cylinder support platform includes four hydraulic cylinder support columns and a hydraulic cylinder support plate. The four hydraulic cylinder support columns are all installed at the bottom of the hydraulic cylinder support plate. A vertical adjustment motor B is installed at the bottom of the hydraulic cylinder support plate. The output end of the vertical adjustment motor B is connected to a drive rod B. Two drive gears B are provided on the drive rod B. An adjustment gear B is meshed at the bottom end of the drive gear B. The middle part of the adjustment gear B is threadedly connected to the support column inside the hydraulic cylinder through a stud. The platform moving module is electrically connected to the vertical adjustment motor B.

[0011] As another improvement of this application, the hydraulic cylinder support column includes an outer hydraulic cylinder support column and an inner hydraulic cylinder support column disposed inside the outer hydraulic cylinder support column. A moving motor B is disposed at the bottom of the inner hydraulic cylinder support column, a moving gear B is installed at the output end of the moving motor B, an adjusting gear B is disposed at the top of the inner hydraulic cylinder support column, and the platform moving module is electrically connected to the moving motor B.

[0012] As a further improvement to this application, a moving motor A is provided on the support plate, and a moving gear A is provided below each moving motor A. Both moving gear A and moving gear B mesh with a rack on the sliding rail, and the platform moving module is electrically connected to the moving motor A.

[0013] As a further improvement to this application, the valve assembly includes a valve body, a valve plug body is disposed inside the valve body, an elastic element is disposed inside the valve plug body, a pressure detection device is fixed at the lower end of the elastic element, a plurality of detection device fixing parts surround the outer ring of the pressure detection device, and the end of the detection device fixing part away from the pressure detection device is fixed to the inner wall of the valve body, and the performance testing module is electrically connected to the pressure detection device.

[0014] As another improvement of this application, a fixing rod B is laterally inserted into one end of the primary transmission rod near the secondary transmission rod, and the fixing rod B is inserted into the end of the secondary transmission rod.

[0015] In summary, this invention eliminates the need for additional hydraulic oil injection into the hydraulic cylinder. Before testing, the hydraulic cylinder support platform and motor drive platform are adjusted to appropriate positions via the control panel to facilitate cylinder installation. Valve assemblies are installed at both hydraulic oil inlet A and hydraulic oil inlet B, and the secondary transmission rod is connected to the hydraulic cylinder telescopic rod. At the start of testing, the drive motor first drives the hydraulic cylinder telescopic rod to a certain position and then locks it. This causes a change in the air pressure inside the hydraulic cylinder, which exerts a force on the telescopic rod. By monitoring the changes in the air pressure detection device and pressure sensor readings over a period of time, the air tightness of the hydraulic cylinder can be determined. This method utilizes air pressure detection to test the air tightness of the hydraulic cylinder and also employs pressure monitoring for verification, improving the accuracy of the device and making the test bench less susceptible to contamination. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a hydraulic cylinder in the prior art;

[0017] Figure 2 This is a three-dimensional structural diagram of the hydraulic cylinder loading experimental device according to the first embodiment of this application;

[0018] Figure 3 This is an exploded view of the motor drive device according to the first embodiment of this application;

[0019] Figure 4 This is an exploded view of the motor drive platform according to the first embodiment of this application;

[0020] Figure 5 This is an exploded view of the hydraulic cylinder support platform according to the first embodiment of this application;

[0021] Figure 6 This is an exploded view of the hydraulic cylinder support column according to the first embodiment of this application;

[0022] Figure 7 This is an exploded view of the valve according to the second embodiment of this application;

[0023] Figure 8 This is a cross-sectional view of the valve according to the second embodiment of this application;

[0024] Figure 9 This is a block diagram illustrating the control principle of the signal processing system according to the second embodiment of this application.

[0025] Explanation of the labels in the diagram:

[0026] 1. Motor drive mechanism; 2. Motor drive platform; 3. Hydraulic cylinder support platform; 4. Hydraulic cylinder; 5. Sliding rail; 111. Drive motor housing; 112. Drive motor; 113. Rotary disk; 114. Fixed rod A; 121. End housing; 122. Primary transmission housing; 123. Secondary transmission housing; 124. Control panel; 131. Primary transmission rod; 132. Fixed rod B; 133. Secondary transmission rod; 134. Pressure sensor; 21. Motor support column; 22. Support column movable hole; 23. Support plate; 24. Moving motor A; 25. Moving gear A; 26. Adjusting gear A; 27. Drive rod A; 28. 1. Drive gear A; 29. ​​Vertical adjustment motor A; 31. Hydraulic cylinder support plate; 32. Hydraulic cylinder support column; 41. Hydraulic cylinder telescopic rod; 42. Hydraulic cylinder body; 43. Hydraulic oil inlet A; 44. Hydraulic oil inlet B; 46. Valve assembly; 321. External support column of hydraulic cylinder; 322. Internal support column of hydraulic cylinder; 323. Moving motor B; 324. Moving gear B; 325. Drive gear B; 326. Vertical adjustment motor B; 327. Drive rod B; 328. Adjusting gear B; 461. Valve body; 462. Valve plug; 463. Elastic element; 464. Air pressure detection device; 465. Detection device fixing component. Detailed Implementation

[0027] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] First implementation method:

[0029] Please see Figure 2 , Figure 3 and Figure 9A hydraulic cylinder loading experimental device includes a motor drive mechanism 1 and a signal processing system. The motor drive mechanism 1 includes a drive motor housing 111, a drive motor 112 installed inside the drive motor housing 111, and a rotating disk 113 installed at the output end of the drive motor 112. A fixed rod A114 is provided on one side of the rotating disk 113. A primary transmission rod 131 is rotatably connected to the fixed rod A114. A secondary transmission rod 133 is hinged to the primary transmission rod 131. A fixed rod B132 is laterally inserted into the end of the primary transmission rod 131 near the secondary transmission rod 133. The fixed rod B132 is inserted into the end of the secondary transmission rod 133. A pressure sensor 134 is provided at the end of the secondary transmission rod 133. The secondary transmission rod 133 is connected to the hydraulic cylinder telescopic rod 41. A secondary transmission housing 123 is fitted around the outer ring of the secondary transmission rod 133. A primary transmission housing 122 is located at one end of the secondary transmission housing 123, and an end housing 121 is located at the other end of the primary transmission housing 122. This structure enables the drive motor 112 to drive the hydraulic cylinder telescopic rod 41 of the hydraulic cylinder under test. The force on the hydraulic cylinder telescopic rod 41 is also detected by the pressure sensor 134. A control panel 124 is installed on the outside of the end housing 121. Valve assemblies 46 are installed at both the hydraulic oil inlet A43 and hydraulic oil inlet B44 of the hydraulic cylinder body 42. (The structure of the hydraulic cylinder is existing technology, such as...) Figure 1 (As shown); the signal processing system includes a platform movement module and a performance detection module. The platform movement module is electrically connected to the control panel 124, the motor-driven platform 2, and the hydraulic cylinder support platform 3, respectively. Through the above structure, the horizontal distance and vertical height of the hydraulic cylinder support platform 3 and the motor-driven platform 2 can be adjusted using the control panel 124. The performance detection module is electrically connected to the pressure sensor 134 and the control panel 124, respectively, and the control panel 124 is used to detect and display the results.

[0030] Please see Figure 2 and Figures 4-6The motor drive mechanism 1 is fixed on the motor drive platform 2. The motor drive platform 2 includes two motor support columns 21. Each of the two motor support columns 21 has an adjusting gear A26 at its lower end. The middle part of the adjusting gear A26 is threadedly connected to the motor support column 21 through a stud. A support plate 23 is provided below the motor support column 21. The motor support column 21 is movably inserted into the support column movable hole 22 on the support plate 23. A vertical adjustment motor A29 is fixed at the bottom of the support plate 23. The output end of the vertical adjustment motor A29 is connected to a drive rod A27. Two drive gears A28 are installed on the drive rod A27. Both drive gears A28 mesh with the adjusting gears A26. The platform moving module is connected to the vertical adjustment motor A29. 9. Electrical connection: Through the above structure, the power supply of the vertical adjustment motor A29 can be switched on and off by the platform movement module. When the vertical adjustment motor A29 is energized and rotates, the drive rod A27 and the drive gear A28 also rotate. Because the drive gear A28 meshes with the adjustment gear A26, the adjustment gear A26 rotates. The thread of the adjustment gear A26 is screwed out or screwed in from the motor support column 21 as it rotates, thereby realizing the up and down movement of the motor drive mechanism 1. The hydraulic cylinder support platform 3 includes four hydraulic cylinder support columns 32 and a hydraulic cylinder support plate 31. The four hydraulic cylinder support columns 32 are all installed at the bottom of the hydraulic cylinder support plate 31. The vertical adjustment motor B326 is installed at the bottom of the hydraulic cylinder support plate 31. The output end of the machine B326 is connected to a drive rod B327. Two drive gears B325 are mounted on the drive rod B327, and an adjusting gear B328 meshes with the bottom of each drive gear B325. The platform moving module is electrically connected to the vertical adjustment motor B326. This structure allows the platform moving module to control the power supply to the vertical adjustment motor B326. When the vertical adjustment motor B326 is energized and rotates, the drive rod B327 and drive gears B325 also rotate. Because the drive gears B325 mesh with the adjusting gears B328, the adjusting gears B328 rotate. As the adjusting gears B328 rotate, their threads screw in or out of the support column 322 inside the hydraulic cylinder. This enables the hydraulic cylinder support plate 3... The vertical movement of hydraulic cylinder 4 is achieved by mounting feet on the cylinder body 42 of hydraulic cylinder 4, which fix the hydraulic cylinder 4 as a whole on the hydraulic cylinder support plate 31. The hydraulic cylinder support column 32 includes an outer hydraulic cylinder support column 321 and an inner hydraulic cylinder support column 322 located inside the outer hydraulic cylinder support column 321. A moving motor B323 is installed at the bottom of the inner hydraulic cylinder support column 322. A moving gear B324 is installed at the output end of the moving motor B323. An adjusting gear B328 is installed at the top of the inner hydraulic cylinder support column 322. The middle part of the adjusting gear B328 is threadedly connected to the inner hydraulic cylinder support column 322 through a stud. The platform moving module is electrically connected to the moving motor B323.A movable motor A24 is mounted on the support plate 23. Below each movable motor A24 is a movable gear A25. Both movable gears A25 and B324 mesh with a rack on the sliding rail 5. The platform moving module is electrically connected to the movable motor A24. This structure allows the platform moving module to control the energization and de-energization of movable motors A24 and B323. When movable motors A24 and B323 are energized and rotate, they respectively drive movable gears A25 and B324 to rotate. Since movable gears A25 and B324 mesh with the rack on the sliding rail 5, this rotational force is converted into a force that drives the platform 2 and the hydraulic cylinder-supported platform 3 to move, thereby adjusting the horizontal distance between the hydraulic cylinder-supported platform 3 and the motor-driven platform 2.

[0031] In summary, this implementation method does not require additional gas injection into the hydraulic cylinder 4. Before testing, the hydraulic cylinder support platform 3 and the motor drive platform 2 are adjusted to a suitable position via the control panel 124 to facilitate the installation of the hydraulic cylinder 4. Valve assemblies 46 are installed on both hydraulic oil inlets A43 and B44. The valve assemblies 46 can detect the air pressure inside the hydraulic cylinder body 42, and the secondary transmission rod 133 is connected to the hydraulic cylinder telescopic rod 41. At the start of testing, the drive motor 112 will first drive the hydraulic cylinder telescopic rod 41 to a certain position and then lock it. Since the hydraulic cylinder telescopic rod 41 is connected to a piston, the piston is driven by... Driven by the motor 112, the air on one side of the piston is compressed and the other side is pulled up. At this time, the air pressure inside the hydraulic cylinder body 42 will change, and this change will generate force on the hydraulic cylinder extension rod 41. By monitoring whether the air pressure value detected by the valve assembly 46 and the pressure value of the pressure sensor 134 change over a period of time, it is determined whether the air tightness of the hydraulic cylinder 4 is qualified, and the detection result is displayed on the control panel 124. In this way, the air tightness of the hydraulic cylinder 4 is detected by air pressure detection method, and the air pressure monitoring method is also used for verification, thereby improving the accuracy of the device.

[0032] Second implementation method:

[0033] Please see Figure 7 and Figure 8Unlike the first embodiment, the valve assembly 46 includes a valve housing 461, a valve plug 462 is disposed inside the valve housing 461, an elastic element 463 is disposed inside the valve plug 462, a pressure detection device 464 is fixed to the lower end of the elastic element 463, and a plurality of detection device fixing parts 465 surround the outer ring of the pressure detection device 464. The end of the detection device fixing part 465 away from the pressure detection device 464 is fixed to the inner wall of the valve housing 461. The performance testing module is electrically connected to the pressure detection device 464. With the above structure, when gas is used to charge the hydraulic cylinder 4, the airflow pushes the valve plug 462, thereby compressing the elastic element 463 and allowing gas to enter. When the gas pressure inside the hydraulic cylinder 4 is high, the gas inside the cylinder pushes the valve plug 462 to lock onto the valve housing 461, preventing gas leakage.

[0034] In summary, this implementation method requires additional gas injection into the hydraulic cylinder 4. During testing, the hydraulic cylinder support platform 3 and motor drive platform 2 are first adjusted to a suitable position via the control panel 124 to facilitate the installation of the hydraulic cylinder 4. Valve assemblies 46 are installed on both hydraulic oil inlets A43 and B44, and the secondary transmission rod 133 is connected to the hydraulic cylinder telescopic rod 41. After the test begins, the drive motor 112 is locked directly, and air is injected into the hydraulic cylinder 4 through the valve assembly 46. Different amounts of gas are injected into both sides of the piston during gas injection, resulting in different air pressures on both sides of the hydraulic cylinder body 42. This will generate force on the hydraulic cylinder telescopic rod 41. Subsequently, the values ​​of the air pressure detection device 464 and pressure sensor 134 are monitored for changes over a period of time to determine whether the air tightness of the hydraulic cylinder 4 is qualified. The test results are displayed on the control panel 124. This method achieves the air tightness test of the hydraulic cylinder 4 using air pressure detection. Unlike the first method, this method can test the mechanical strength of the hydraulic cylinder 4 by injecting air to achieve the corresponding working conditions of the hydraulic cylinder 4.

[0035] In light of current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Various changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A hydraulic cylinder loading experimental device, characterized in that, It includes: Motor drive mechanism (1) and signal processing system; The motor drive mechanism (1) includes a drive motor housing (111), a drive motor (112) installed inside the drive motor housing (111), and a rotating disk (113) installed at the output end of the drive motor (112). A fixed rod A (114) is provided on one side of the rotating disk (113). The fixed rod A (114) is rotatably connected to a primary transmission rod (131). A secondary transmission rod (133) is hinged to the primary transmission rod (131). The end of the secondary transmission rod (133) is provided with... The pressure sensor (134) is provided with a secondary transmission housing (123) on the outer ring of the secondary transmission rod (133). A primary transmission housing (122) is provided at one end of the secondary transmission housing (123), and an end housing (121) is provided at the other end of the primary transmission housing (122). A control panel (124) is installed on the outside of the end housing (121). A valve assembly (46) is installed at both the hydraulic oil inlet A (43) and the hydraulic oil inlet B (44) of the hydraulic cylinder body (42). The signal processing system includes a platform moving module and a performance detection module. The platform moving module is electrically connected to the control panel (124), the motor-driven platform (2), and the hydraulic cylinder support platform (3), respectively. The performance detection module is electrically connected to the pressure sensor (134) and the control panel (124), respectively. The valve assembly (46) includes a valve housing (461), a valve plug (462) is provided inside the valve housing (461), an elastic element (463) is provided inside the valve plug (462), a pressure detection device (464) is fixed at the lower end of the elastic element (463), a plurality of detection device fixing parts (465) surround the outer ring of the pressure detection device (464), and the end of the detection device fixing part (465) away from the pressure detection device (464) is fixed to the inner wall of the valve housing (461). The performance testing module is electrically connected to the pressure detection device (464).

2. The hydraulic cylinder loading experimental device according to claim 1, characterized in that: The motor drive mechanism (1) is fixed on the motor drive platform (2). The motor drive platform (2) includes two motor support columns (21). The lower ends of the two motor support columns (21) are provided with adjustment gears A (26). The two motor support columns (21) are respectively set in the corresponding support column movable holes (22) on the support plate (23).

3. The hydraulic cylinder loading test device according to claim 2, characterized in that: A vertical adjustment motor A (29) is fixed at the bottom of the support plate (23). The output end of the vertical adjustment motor A (29) is connected to a drive rod A (27). Two drive gears A (28) are installed on the drive rod A (27). Both drive gears A (28) are meshed with adjustment gears A (26). The platform moving module is electrically connected to the vertical adjustment motor A (29).

4. The hydraulic cylinder loading test device according to claim 1, characterized in that: The hydraulic cylinder support platform (3) includes four hydraulic cylinder support columns (32) and a hydraulic cylinder support plate (31). The four hydraulic cylinder support columns (32) are all installed at the bottom of the hydraulic cylinder support plate (31). A vertical adjustment motor B (326) is installed at the bottom of the hydraulic cylinder support plate (31). The output end of the vertical adjustment motor B (326) is connected to a drive rod B (327). Two drive gears B (325) are provided on the drive rod B (327). An adjustment gear B (328) meshes at the bottom end of the drive gear B (325). The platform moving module is electrically connected to the vertical adjustment motor B (326).

5. The hydraulic cylinder loading test device according to claim 4, characterized in that: The hydraulic cylinder support column (32) includes an outer hydraulic cylinder support column (321) and an inner hydraulic cylinder support column (322) disposed inside the outer hydraulic cylinder support column (321). A moving motor B (323) is provided at the bottom of the inner hydraulic cylinder support column (322). A moving gear B (324) is installed at the output end of the moving motor B (323). An adjusting gear B (328) is provided at the top of the inner hydraulic cylinder support column (322). The platform moving module is electrically connected to the moving motor B (323).

6. The hydraulic cylinder loading test device according to claim 2, characterized in that: The support plate (23) is provided with a moving motor A (24), and each moving motor A (24) is provided with a moving gear A (25) below it. The moving gear A (25) and the moving gear B (324) are both meshed with the rack on the sliding rail (5). The platform moving module is electrically connected to the moving motor A (24).

7. The hydraulic cylinder loading experimental device according to claim 1, characterized in that: A fixing rod B (132) is laterally inserted into one end of the primary transmission rod (131) near the secondary transmission rod (133), and the fixing rod B (132) is inserted into the end of the secondary transmission rod (133).

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