Hydraulic damper overhauling device

Abstract

The invention discloses a hydraulic damper overhauling device, and belongs to the technical field of hydraulic damper overhauling. The device comprises a frame, a pulling and pressing module, an unscrewing and screwing module, a hydraulic oil pumping and filling module and a display control module. By arranging the pulling and pressing module, the unscrewing and screwing module, the hydraulic oil pumping and filling module and the display control module, the maintenance efficiency and quality can be remarkably improved, and danger caused by manual operation is reduced. Automatic equipment can execute accurate operations such as automatic disassembly and assembly, accurate measurement of damping performance data, cleaning and liquid medium replacement, and personal errors are reduced. In addition, the automation equipment can monitor the state of the hydraulic damper through a sensor, obtain data in real time and carry out fault diagnosis and predictive analysis, and the accuracy and efficiency of fault detection are improved.

Description

Technical Field

[0001] The invention relates to the technical field of damper maintenance, and in particular to a hydraulic damper maintenance device. Background Art

[0002] Hydraulic dampers play a key role in many industrial fields. They are widely used in aviation, high-speed trains, bridges, buildings, vibrating equipment and engineering machinery to reduce the vibration, shock and vibration of structures and equipment. The proper operation of hydraulic dampers is essential to protect equipment, extend service life and ensure the safety of personnel and the environment.

[0003] During long-term use, hydraulic dampers may fail or degrade in performance due to working environment, load changes, and wear. In order to ensure the normal operation of hydraulic dampers, users need to regularly disassemble, maintain, and inspect hydraulic dampers according to maintenance requirements to ensure that they work properly. However, current repair and verification require manual intervention and time-consuming maintenance processes. These processes include disassembling hydraulic dampers, cleaning and replacing liquid media, inspecting and replacing seals, and reassembling. This not only requires a lot of manual labor and time, but also presents challenges in error and quality control. The shortcomings and disadvantages are: First, manually removing the end cover with a wrench can easily cause structural damage to the skid hydraulic damper. Second, the confidence of the verification results is low. The current verification method uses a 20Kg weight to gravity load the damper to be verified and manually time it with a stopwatch, which is not only time-consuming and labor-intensive, but also has low confidence in the verification results.

[0004] Therefore, it is necessary to develop a hydraulic damper maintenance device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic damper maintenance device which can significantly improve maintenance efficiency and quality, perform precise operations, and improve the accuracy and efficiency of fault detection.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A hydraulic damper maintenance device comprises a frame, a tension and compression module, an unscrewing and tightening module, a hydraulic oil pumping and filling module, and a display control module.

[0007] Specifically, the frame includes a top plate, four optical axes, a T-joint, a damper fixture groove, a base, a back plate, a triangular reinforcement rib and a bottom plate; a base is provided at the lower end of the bottom plate and is fixedly connected by bolts, the bottom plate is fixedly connected to the lower ends of the two lower optical axes by bolts, and the upper ends of the two upper optical axes are fixedly connected to one end of the top plate by bolts; one end of the T-joint is fixedly connected to the back plate by bolts, and the other end is connected to the opposite ends of the upper optical axis and the lower optical axis; the other end of the top plate is fixedly connected to the upper end of the back plate by bolts, and the lower end of the back plate is fixedly connected to the base by bolts; the short right-angled side of the triangular reinforcement rib is fixedly connected to the bottom plate by bolts, and the long right-angled side of the triangular reinforcement rib is fixedly connected to the back plate by bolts; the lower end of the damper fixture groove is fixedly connected to the bottom plate by bolts.

[0008] Specifically, the material of the frame is mainly composed of two materials: aluminum alloy profiles and No. 1 steel; among them, the material of the four optical axes is No. 1 steel, and the rest of the frames are made of aluminum alloy plates or profiles; the bottom plate and the top plate are provided with holes and grooves for installing parts, the four optical axes are connected to the back plate by T-joints, and the base is made of hard rubber material.

[0009] Specifically, the tension and compression module, the unscrewing and tightening module, the hydraulic oil pumping module and the display control module specifically include: a slide, a stepper motor, a pressure sensor, a U-shaped part, a support shaft, a cover opening device, a planetary gear reducer, a brushless motor, a linear bearing, a small peristaltic oil pump, a touch screen, and a chassis; one side of the slide is slidably connected to the back plate, the lower end of the slide is fixedly connected to the stepper motor by bolts, the upper end of the slide is provided with a through hole, and the cylindrical sleeve at the upper end of the stepper motor is arranged in the through hole at the upper end of the slide; the upper end of the pressure sensor is fixedly connected to the stepper motor by bolts The lower end of the pressure sensor is fixedly connected to the upper end of the U-shaped part by bolts; the upper end of the support shaft is clamped on the T-shaped joint, and the lower end of the support shaft is fixedly connected to the bottom plate by bolts; the two sides of the cover opening device are respectively sleeved on the two optical axes above, and linear bearings are also provided on both sides of the cover opening device and are respectively sleeved on the two optical axes above, and the upper end of the cover opening device is provided with a planetary gear reducer and a brushless motor; the upper end of the touch display screen is fixedly connected to the top plate by bolts; the lower end of the chassis is fixedly connected to the bottom plate by bolts; the small peristaltic oil pump is fixedly arranged on one side of the chassis.

[0010] Specifically, the cover opening device includes a large gear, a pin hole is provided in the large gear, a small gear is connected to the large gear, and a ball bearing is provided in the small gear.

[0011] Specifically, the touch display screen is electrically connected to the chassis, and the control system in the chassis uses an STM32 single-chip microcomputer as a main control chip.

[0012] Specifically, the edges of the components are rounded.

[0013] The beneficial effects of the present invention are: This application can significantly improve maintenance efficiency and quality and reduce the dangers caused by manual operation by setting up a tension and compression module, an unscrewing and tightening module, a hydraulic oil pumping and filling module, and a display control module. Automated equipment can perform precise operations, such as automatic disassembly and assembly, accurate measurement of damping performance data, cleaning and liquid medium replacement, reducing human errors. In addition, automated equipment can also monitor the status of hydraulic dampers through sensors, obtain data in real time, and perform fault diagnosis and predictive analysis to improve the accuracy and efficiency of fault detection.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a hydraulic damper maintenance device shown in one embodiment of the present invention; Figure 2 It is a structural schematic diagram of a framework shown in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a cover opening device shown in one embodiment of the present invention; Figure 4 This is an incremental PID control structure diagram shown in one embodiment of the present invention; Figure 5 The present invention is a flowchart of an operation of a hydraulic damper maintenance device according to an embodiment of the present invention.

[0016] Figure numerals: 1. frame; 101. top plate; 102. optical axis; 103. T-joint; 104. damper fixture groove; 105. base; 106. back plate; 107. triangular reinforcement rib; 108. bottom plate; 2. slide; 3. stepper motor; 4. pressure sensor; 5. U-shaped part; 6. support shaft; 7. cover opening device; 701. large gear; 702. pin hole; 703. small gear; 704. ball bearing; 8. planetary gear reducer; 9. brushless motor; 10. linear bearing; 11. small peristaltic oil pump; 12. touch display screen; 13. chassis. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] See also Figure 1~Figure 2 The present invention provides a hydraulic damper maintenance device, including a frame 1, a tension and compression module, an unscrewing and tightening module, a hydraulic oil pumping and filling module, and a display control module.

[0022] Specifically, the frame 1 includes a top plate 101, four optical axes 102, a T-joint 103, a damper fixture slot 104, a base 105, a back plate 106, a triangular reinforcing rib 107 and a bottom plate 108. The bottom end of the bottom plate 108 is provided with the base 105 and fixedly connected by bolts, the bottom plate 108 is fixedly connected to the lower ends of the two lower optical axes 102 by bolts, and the upper ends of the two upper optical axes 102 are fixedly connected to one end of the top plate 101 by bolts. One end of the T-joint 103 is fixedly connected to the back plate 106 by bolts, and the other end is connected to the opposite ends of the upper optical axis 102 and the lower optical axis 102. The other end of the top plate 101 is fixedly connected to the upper end of the back plate 106 by bolts, and the lower end of the back plate 106 is fixedly connected to the base 105 by bolts. The short right-angled side of the triangular reinforcing rib is fixedly connected to the bottom plate 108 by bolts, and the long right-angled side of the triangular reinforcing rib is fixedly connected to the back plate 106 by bolts. The lower end of the damper fixture slot 104 is fixedly connected to the bottom plate 108 by bolts.

[0023] Specifically, the material of the frame 1 is mainly composed of two materials: aluminum alloy profile and 45# steel. Among them, the material of the linear optical axis 102 is 45# steel, and the rest of the frame 1 is made of 6061 aluminum alloy plate or profile. And the boundaries of each component are rounded to avoid stress concentration on the one hand, and to avoid accidental injury to the operator when the equipment is disassembled and assembled on the other hand. The bottom plate 108 and the top plate 101 are punched with holes and grooves for installing various components. The aluminum alloy profile back plate 106 and the triangular reinforcement ribs improve the overall stability of the mechanism when performing impact and tightening actions. The linear optical axis 102 is connected to the back plate 106 by a T-joint 103, which mainly provides longitudinal support for the tightening mechanism. The base 105 is made of hard rubber material, which can effectively reduce the vibration generated during the working process.

[0024] Specifically, the tension and compression module, the unscrewing and tightening module, the hydraulic oil pumping module and the display control module specifically include: a slide 2, a stepper motor 3, a pressure sensor 4, a U-shaped part 5, a support shaft 6, a cover opening device 7, a planetary gear reducer 8, a brushless motor 9, a linear bearing 10, a small peristaltic oil pump 11, a touch screen 12, and a chassis 13. One side of the slide 2 is slidably connected to the back plate 106, and the lower end of the slide 2 is fixedly connected to the stepper motor 3 by bolts. A through hole is opened at the upper end of the slide 2, and the cylindrical sleeve at the upper end of the stepper motor 3 is arranged in the through hole at the upper end of the slide 2. The upper end of the pressure sensor 4 is fixedly connected to the stepper motor 3 by bolts, and the lower end of the pressure sensor 4 is fixedly connected to the upper end of the U-shaped part 5 by bolts. The upper end of the support shaft 6 is clamped on the T-shaped joint 103, and the lower end of the support shaft 6 is fixedly connected to the bottom plate 108 by bolts. The two sides of the cover opening device 7 are respectively sleeved on the two optical axes 102 above, and linear bearings 10 are also provided on both sides of the cover opening device 7 and are respectively sleeved on the two optical axes 102 above. The upper end of the cover opening device 7 is provided with a planetary gear reducer 8 and a brushless motor 9. The upper end of the touch display screen 12 is fixedly connected to the top plate 101 by bolts. The lower end of the chassis 13 is fixedly connected to the bottom plate 108 by bolts. A small peristaltic oil pump 11 is fixedly set on one side of the chassis 13. The control system and power supply for this device are provided in the chassis 13.

[0025] Please refer to Figure 3 The cover opening device 7 includes a large gear 701, a pin hole 702 is provided in the large gear 701, a small gear 703 is connected to the large gear 701, and a ball bearing 704 is provided in the small gear 703; there are two pin holes 702 on the surface of the large gear 701, and the pins are inserted to closely match the end cover of the hydraulic damper, so as to realize the function of unscrewing and tightening the end cover of the hydraulic damper. In addition, linear bearings 10 are provided on both sides of the cover opening device 7 to meet the linear displacement of the end cover of the hydraulic damper during the loosening and tightening process.

[0026] Specifically, the touch screen 12 is electrically connected to the chassis 13, and the control system in the chassis 31 uses an STM32 single-chip microcomputer as the main control chip. The STM32 single-chip microcomputer is responsible for receiving and processing signals from sensors and operation interfaces. At the same time, the entire display control module is provided with limit switches and emergency stop knobs at multiple locations to facilitate the staff to disconnect the equipment in an emergency or restart. At the same time, the system can be redeveloped, and all programs are written in C language to monitor and adjust the operating status of the equipment, and control the operation of motors, oil pumps and other equipment as needed.

[0027] See also Figure 4 The tension and compression module is designed with an incremental PID controller, which can provide a constant tension and pressure of 200N to meet the mechanical requirements of the test.

[0028] ; Formula (1) in, , and are the proportional, integral, and differential coefficients of the PID controller, and is the error at the current moment.

[0029] The control accuracy of the force sensor used is 7%, and the average error of the pulling force can be controlled within ±14 N. The control unit of the STM32 microcontroller is used to achieve automatic control, and the code comment rate is above 90%, which is enough to meet the needs of users for secondary development.

[0030] When preparing for tension and compression testing, first pass the hydraulic damper to be tested through the hole reserved in the large gear 701 in the cover opening device 7, and then use pins to connect the damper fixture slot 104 and the hydraulic damper. If the gap in the fixture slot is too large, a protective pad needs to be added. Before connecting, ensure that the positions of the optical axes 102 on both sides are horizontal and parallel. Then, operate the stepper motor 3 through the control system to lower the slide 2 to the appropriate position, that is, the position where the pin hole 702 of the U-shaped part 5 coincides with the pin hole 702 at the top of the damper, insert the pin, and install a dust cover on the slide 2 and the worm to ensure the stability of the equipment in extreme environments and avoid the influence of various dust on the accuracy of the worm. The tooling is completed. After that, the damper performance test can be carried out.

[0031] When the tension and compression module is working, the closed-loop system composed of the stepper motor 3, the pressure sensor 4 and the control system provides a constant tension of 200N, and the slide 2 connected to the stepper motor 3 drives the hydraulic damper piston rod to achieve upward movement. During the operation, the real-time tension, rising distance and response time are collected as output signals to determine whether the hydraulic damper has reached the condition requiring maintenance; at the same time, the real-time force feedback is used as the cutoff condition and a threshold of 50N is reserved. When the threshold is exceeded, the stop condition is met. When the compression action is performed, the constant tension provided by the stepper motor 3 becomes a constant pressure, and the slide 2 drops accordingly, driving the hydraulic damper piston rod to complete the contraction action. The pressure value of 350N is used as the stop condition for the downward action. When the condition is met, it is considered that the piston rod is pressed down to the specified position, and the tensile test can be carried out.

[0032] The stepper motor 3 is selected as the power unit. The closed-loop system composed of the stepper motor 3, the pressure sensor 4 and the control system has the advantages of high-precision position control capability, stable driving force, high response characteristics, high reliability and the like. At the same time, the stepper motor 3 runs smoothly and has low noise regardless of high or low speed operation. Compared with other control forms, the electric drive has the advantages of simple structure and easy control. The slide 2 is used to drive the lifting movement, and the pressure sensor 4 on each side can ensure the horizontal position of the loading process, thereby ensuring the stability of the loading direction. At the same time, it can effectively ensure that the driving force and loading speed are carried out according to the settings. The vertical loading form will greatly save the space occupied by the whole, which is conducive to reducing the weight of the whole machine. The design of the U-shaped connecting buckle will simplify the installation and unloading process and facilitate the operation of the staff.

[0033] When preparing for the tightening work, after the pulling and pressing work is completed, remove the two pins inserted into the damper joint bearing, turn on the lighting inside the U-shaped part 5, hold the damper with a centering fixture for centering, and facilitate the insertion of the pins into the pin holes on the damper end cover. Manually adjust the position of the pin holes in the large gear 701 to align with the pin holes of the damper end cover, insert two pins, so that the cover opening device 7 and the damper end cover can effectively cooperate, and the entire installation process is completed.

[0034] When the unscrewing and tightening module is working, press the unscrewing key to start the brushless motor 9, and the gears are driven to rotate through the cooperation of the brushless motor 9 and the reducer. The control interface of the touch display screen 12 is provided with a fast gear and a slow gear. The torque of the slow gear is large, but the speed is slow. The termination condition is that the current is 0.4A or the opening time reaches 15s. When the slow unscrewing process is completed, it is adjusted to the fast gear to achieve fast unscrewing. The termination condition is that the current is 1A or the time reaches 110s until the uncapping process is completed. When tightening, the brushless motor 9 is started through the tightening key of the control panel. The unscrewing and tightening module is provided with fast and slow gears. The termination condition of the fast gear is that the current is 0.55A or the time reaches 110s, and the termination condition of the slow gear is that the current is 0.13A until the tightening process is completed. In addition, the linear bearings 10 located on both sides will move up and down accordingly. This movement is mainly used to meet the linear displacement generated during the rotation of the end cover to ensure that the whole process can be carried out smoothly, stably and accurately.

[0035] The unscrewing and tightening modules have the following main features: 1. The shaft and hole are matched, and installation and removal can be easily completed without any tools; 2. Mainly adopts the gear transmission mode, the transmission ratio is accurate and stable, can ensure accurate speed and torque transmission, can achieve higher transmission efficiency, reduce energy loss. The structure is relatively simple, the operation is reliable, and the service life is long. The working environment is applicable to a wide range; 3. Linear bearings 10 are used on both sides to achieve precise linear motion, ensuring the accuracy and stability of the unscrewing and tightening modules. The friction coefficient is small, reducing energy loss and wear. In addition, the movement process is more stable and smooth, reducing vibration and noise. While maintenance is simple, linear bearings 10 of the same specifications have good interchangeability; 4. The pin connection between the large gear 701 and the hydraulic damper is made of a material with a relatively low hardness. When a large extrusion force is received, the pin is deformed first to avoid extrusion deformation of the protective upper end cover hole; 5. The module has a simple structure, requires fewer parts to support, and has a compact structure, which can further reduce the overall weight of the machine.

[0036] The hydraulic oil pumping and filling module is mainly composed of two completely independent and mutually separated small peristaltic oil pumps 11, which can avoid cross contamination that may occur during the oil pumping and transportation process.

[0037] When the hydraulic oil pumping and filling module is working, first insert a transparent oil pumping tube with a diameter of 4mm into the damper with the end cover unscrewed, and start pumping and filling by pressing the pumping and filling keys on the control panel. The oil pumping line and the oil delivery line are separated from each other. This separation design can significantly reduce the risk of cross contamination of hydraulic oil. The contamination level of the hydraulic oil entering the damper shall not exceed 7 / A according to the pollutant level specified in GJB420B-2006. The filter used has extremely efficient filtering ability and a large enough capacity to fully meet the flow requirements and contamination requirements.

[0038] The control system in the display control module is divided into five parts: "Installation / disassembly", "Stretching detection", "Unscrewing / tightening", "Hydraulic oil replacement" and "Settings".

[0039] When in use, entering the "installation / disassembly" sub-interface can control the stepper motor 3 and the brushless motor 9, that is, complete the lifting and lowering of the tension and compression module and the unscrewing and tightening of the tightening module. The interface provides a manual operation button to facilitate the operator to perform manual operation. The sub-interface of the stretch detection provides buttons for initializing the hydraulic damper piston rod position and the pressure sensor 4. After initializing the system, click Next to start the stretch detection step of the hydraulic damper piston rod. The interface will display the data of the piston rod stroke, force value and time, so that the operator can judge whether the damper has reached the maintenance conditions. In addition, the setting interface can modify the value of the stepper motor 3 tension. Clicking Next again will jump to the unscrewing / tightening control interface. At the same time, you can also directly enter the unscrewing / tightening control interface from the main menu. In addition to the relevant control buttons, the unscrewing / tightening control interface also sets an overload prompt to prevent the motor from being damaged due to overloading for too long. The hydraulic oil replacement interface will display the oil injection amount and oil extraction amount, so that the operator can pay attention to the hydraulic oil extraction process in real time.

[0040] In summary, after the hydraulic damper is installed on the inspection device shown in this application, it is necessary to first perform a constant force tensile test according to the operating manual to determine whether it meets the use standards. If the tensile force is 200N, the time it takes for the damper piston rod to be pulled from the lowest position to the highest position is between 11 and 13 seconds, it can be determined that the damper meets the use standards, and the damper can be directly removed and continued to be used. Otherwise, the end cover can be unscrewed through the tightening device, and the hydraulic oil can be replaced and continued to test until it meets the use standards. Rubber gloves must be worn throughout the operation process. For details, please refer to Figure 5 .

[0041] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A hydraulic damper maintenance device, characterized in that: It includes a frame, a tension and compression module, an unscrewing and tightening module, a hydraulic oil pumping and filling module, and a display control module.

2. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: The frame includes a top plate, four optical axes, a T-joint, a damper fixture slot, a base, a back plate, a triangular reinforcing rib and a bottom plate; a base is provided at the lower end of the bottom plate and is fixedly connected by bolts, the bottom plate is fixedly connected to the lower ends of the two optical axes below by bolts, and the upper ends of the two optical axes above are fixedly connected to one end of the top plate by bolts; One end of the T-joint is fixedly connected to the back plate by bolts, and the other end is connected to the opposite ends of the upper optical axis and the lower optical axis; the other end of the top plate is fixedly connected to the upper end of the back plate by bolts, and the lower end of the back plate is fixedly connected to the base by bolts; the short right-angled side of the triangular reinforcement rib is fixedly connected to the bottom plate by bolts, and the long right-angled side of the triangular reinforcement rib is fixedly connected to the back plate by bolts; the lower end of the damper clamp groove is fixedly connected to the bottom plate by bolts.

3. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: The material of the frame is mainly composed of aluminum alloy profiles and No. 1 steel; among them, the material of the four optical axes is No. 1 steel, and the rest of the frame is made of aluminum alloy plates or profiles; the bottom plate and the top plate are provided with holes and grooves for installing parts, the four optical axes are connected to the back plate by T-joints, and the base is made of hard rubber material.

4. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: The tension and compression module, the unscrewing and tightening module, the hydraulic oil pumping module and the display control module specifically include: a slide, a stepper motor, a pressure sensor, a U-shaped part, a support shaft, a cover opening device, a planetary gear reducer, a brushless motor, a linear bearing, a small peristaltic oil pump, a touch display screen, and a chassis. One side of the slide is slidably connected to the back plate, the lower end of the slide is fixedly connected to the stepper motor by bolts, the upper end of the slide is provided with a through hole, and the cylindrical sleeve at the upper end of the stepper motor is arranged in the through hole at the upper end of the slide; The upper end of the pressure sensor is fixedly connected to the stepper motor by bolts, and the lower end of the pressure sensor is fixedly connected to the upper end of the U-shaped part by bolts; the upper end of the support shaft is clamped on the T-joint, and the lower end of the support shaft is fixedly connected to the bottom plate by bolts; the two sides of the cover opening device are respectively sleeved on the two optical axes above, and linear bearings are also provided on both sides of the cover opening device and are respectively sleeved on the two optical axes above, and the upper end of the cover opening device is provided with a planetary gear reducer and a brushless motor; the upper end of the touch display screen is fixedly connected to the top plate by bolts; the lower end of the chassis is fixedly connected to the bottom plate by bolts; the small peristaltic oil pump is fixedly set on one side of the chassis.

5. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: The cover opening device comprises a large gear, a pin hole is arranged in the large gear, a small gear is connected with the large gear, and a ball bearing is arranged in the small gear.

6. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: The touch display screen is electrically connected to the chassis, a control system and a power supply are arranged in the chassis, and the control system adopts an STM32 single-chip microcomputer as a main control chip.

7. A hydraulic damper maintenance device as claimed in claim 1, characterized in that: Round the edges of each component.

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