Durability testing apparatus

Abstract

This invention provides a durability testing device for driving a height valve to perform fatigue testing. It includes a drive unit, a rotating component, and a connecting rod. By changing the position of the connecting rod connected in the axially arranged groove of the rotating component, the reciprocating swing angle range of the height valve drive rod can be adjusted to adapt to different specifications of height valves. The durability testing device also includes a control module and a pressure detection module. The control module is configured to control the operating frequency of the drive unit and includes an anomaly detection unit for determining whether the height valve has entered fatigue mode based on the detection data from the pressure detection module. The durability testing device also includes a base with a mounting plate. The mounting plate has mounting holes for fixing height valves of different specifications, and the mounting plate includes multiple working areas to simultaneously fix and test multiple height valves.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a durability testing device. Background Technology

[0002] The height valve durability test device is a key piece of equipment used to test the long-term reliability of the height valve in a vehicle air suspension system. Its core function is to simulate the inflation and deflation of the height valve under actual working conditions and verify its performance stability after high-frequency cycles.

[0003] Common height valve durability testing equipment is complex in structure, cumbersome to operate, and expensive. Currently, there are corresponding durability testing benches for different versions and models of height valves, which are used to test specific types of height valves. These different height valve durability testing benches are not interoperable, resulting in each durability testing bench being able to test only a limited range of height valves. The wide variety of height valve durability testing benches increases the design and production burden of durability testing benches. Utility Model Content

[0004] The purpose of this invention is to provide a durability testing device to solve the problems of limited testing objects and poor compatibility of existing high valve durability testing devices.

[0005] To solve the above-mentioned technical problems, this utility model provides a durability testing device for driving a height valve to perform durability testing. The height valve includes a valve body and a drive rod. The drive rod rotates to control the valve body to perform venting and inflation operations. The durability testing device includes a drive unit, a rotating component, and a connecting rod.

[0006] The drive rod is connected to the rotating component via the connecting rod; the rotating component, the connecting rod, and the drive rod are connected to form a linkage mechanism, and the drive unit is configured to drive the rotating component to rotate so as to drive the drive rod to reciprocate through the connecting rod;

[0007] The connecting rod is movably connected vertically relative to the rotating component, such that the connecting rod is horizontal and connected to the drive rod in the initial position.

[0008] Optionally, the rotating component has a slide groove arranged along the axial direction, and the connecting rod moves up and down in the slide groove to change its connection position with the rotating component, thereby changing the angular range of the reciprocating swing of the drive rod.

[0009] Optionally, the rotating component is provided with a locking component, which is configured to fix the connection position of the connecting rod and the rotating component in the slide groove when the angle of the reciprocating swing of the drive rod reaches the target range.

[0010] Optionally, the durability testing apparatus further includes a control module electrically connected to the drive unit and configured to control the rotational speed of the drive unit and record the number of reciprocating swings of the drive rod.

[0011] Optionally, the valve body is connected to a gas source via a pipeline, and the durability testing device further includes a gas pressure detection module, which includes a pressure sensor and a solenoid valve installed on the pipeline; wherein,

[0012] The pressure sensor is located between the valve body and the solenoid valve.

[0013] Optionally, the control module is also electrically connected to the pressure sensor and the solenoid valve, for receiving signals from the pressure sensor and controlling the opening and closing of the solenoid valve; wherein,

[0014] The control module includes an anomaly detection unit, which determines whether the height valve has entered fatigue mode based on whether the change in the pressure sensor data exceeds a preset threshold range within a preset time, and controls the drive unit to stop working when the height valve enters fatigue mode.

[0015] Optionally, the durability testing apparatus further includes a base with a mounting plate having multiple mounting holes to accommodate the installation of height valves of different specifications.

[0016] Optionally, the mounting plate includes multiple working areas for fatigue testing of multiple height valves, each working area being provided with a drive unit, a rotating component, and a connecting rod.

[0017] Optionally, the drive unit includes a servo motor, the output shaft of which is tightly connected to the rotating component.

[0018] Optionally, the connecting rod and the driving rod, as well as the connecting rod and the rotating component, are rotatably connected by the pin.

[0019] In summary, this utility model provides a durability testing device for fatigue testing of height valves. It includes a drive unit, a rotating component, and a connecting rod. By changing the position of the connecting rod connected in the axially arranged groove of the rotating component, the reciprocating swing angle range of the height valve drive rod can be adjusted to adapt to different specifications of height valves. The durability testing device also includes a control module and a pressure detection module. The control module is configured to control the operating frequency of the drive unit and includes an anomaly detection unit for determining whether the height valve has entered a fatigue mode based on the detection data from the pressure detection module. The durability testing device also includes a base with a mounting plate. The mounting plate has mounting holes for fixing height valves of different specifications, and the mounting plate includes multiple working areas to simultaneously fix and test multiple height valves.

[0020] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:

[0021] The connecting rod changes its connection position with the rotating component by moving up and down, thereby precisely controlling the swing angle range of the drive rod to adapt to different specifications of height valves and enhancing the compatibility of the durability testing device.

[0022] The mounting plate has multiple mounting holes for fixing height valves of different specifications, and the mounting plate includes multiple working areas to fix and test multiple height valves at the same time, which solves the problem of testing a single object and improves testing efficiency.

[0023] The control module precisely controls the test frequency and analyzes air pressure data, enabling timely fatigue assessment and improving test accuracy. Attached Figure Description

[0024] Figure 1 A schematic diagram of the durability testing device provided in this embodiment of the utility model;

[0025] The labels in the attached figures are explained as follows:

[0026] 1-Servo motor; 2-Rotating component; 3-Screw; 4-Slide groove; 5-Connecting rod; 6-Guide hole; 7-Pin; 8-Bolt; 100-Base; 110-Mounting plate; 120-Mounting hole; 200-Control module; 210-Pressure sensor; 220-Solenoid valve; 230-Pipeline; 300-Height valve; 310-Valve body; 320-Inlet port; 330-Air spring port; 340-Exhaust port; 350-Drive rod. Detailed Implementation

[0027] The fatigue testing device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise scales, used only to facilitate and clarify the explanation of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different figures may have different emphases and sometimes use different scales. It should be understood that relative terms such as "above," "below," "top," and "bottom" shown in the drawings can be used to describe the relationships between various elements. These relative terms are intended to cover different orientations of elements other than those depicted in the drawings. For example, if the device is inverted relative to the view in the drawings, an element described as "above" another element will now be below that element. It should also be understood that, unless specifically stated or indicated, the terms "first," "second," "third," etc., in the specification are only used to distinguish the various components, elements, steps, etc., in the specification, and are not used to indicate logical or sequential relationships between the various components, elements, steps, etc.

[0028] refer to Figure 1 The present invention provides a durability testing device for performing durability testing on a height valve 300. The height valve 300 includes a valve body 310 and a drive rod 350. The drive rod 350 rotates to control the valve body 310 to perform venting and inflation operations. The durability testing device includes a drive unit, a rotating component 2, and a connecting rod 5.

[0029] The drive rod 350 is connected to the rotating component 2 via the connecting rod 5; the rotating component 2, the connecting rod 5, and the drive rod 350 are connected to form a linkage mechanism, and the drive unit is configured to drive the rotating component 2 to rotate so as to drive the drive rod 350 to reciprocate through the connecting rod 5;

[0030] The connecting rod 5 is movably connected to the rotating component 2 in a vertical position, so that the connecting rod 5 is horizontal and connected to the driving rod 350 in the initial position.

[0031] In this embodiment, the connecting rod 5 changes its connection position with the rotating component 2 by moving up and down, thereby precisely controlling the swing angle range of the drive rod 350 to adapt to different specifications of height valves 300, thus enhancing the compatibility of the durability testing device.

[0032] The structure and working principle of the durability testing device proposed in this embodiment will be further described below with reference to the accompanying drawings.

[0033] Preferably, to improve the compatibility of the durability testing apparatus, this embodiment of the invention proposes that the durability testing apparatus can be adapted to height valves 300 of different specifications. That is, the durability testing apparatus provided by this embodiment of the invention can be adjusted to meet the requirements of the length and swing angle range of the drive rod 350 of different specifications of height valves 300. For example, referring to... Figure 1 As shown, the durability testing device provided in this embodiment of the present invention forms a linkage structure by connecting the rotating component 2 and the connecting rod 5 to the driving rod 350. The rotating component 2 has a sliding groove 4 arranged along the axial direction. The connecting rod 5 can move along the sliding groove 4 to change the connection position with the rotating component 2. When the connection position moves away from the rotation center to increase the swing angle of the driving rod 350, and when the connection position moves closer to the rotation center to decrease the swing angle of the driving rod 350, the output swing angle range can be adjusted by changing the position of the connection point on the rotating component 2, thereby adapting to the length and swing angle requirements of the driving rod 350 of different specifications of height valve 300. When the required reciprocating swing angle of the driving rod 350 of the height valve 300 to be tested is reached, the connection position of the connecting rod 5 with the rotating component 2 in the sliding groove 4 is fixed by a pin.

[0034] The durability testing apparatus provided in this embodiment includes a base 100. Preferably, the base 100 has a mounting plate 110 for supporting the height valve 300 to be tested. The mounting plate 110 has multiple mounting holes 120, each with internal threads. The height valve 300 is fixed to the mounting plate 110 by bolts 8, thus preventing the height valve 300 from loosening or accidentally detaching from the mounting plate 110 under continuous external force during testing. Since different specifications of height valves 300 have different outline dimensions, preferably, in this embodiment, the multiple mounting holes 120 are densely distributed on the mounting plate 110. By adjusting the installation position of different specifications of height valves 300, height valves 300 of different sizes can be matched with the densely distributed mounting holes 120 and fixed with bolts 8, thereby solving the problem of a single test object.

[0035] Preferably, to improve the testing efficiency of the durability testing device, this embodiment of the invention provides a durability testing device capable of multi-station parallel testing. Specifically, the durability testing device provided in this embodiment includes at least two working areas to simultaneously perform durability tests on two height valves 300. See details [link to specific documentation]. Figure 1As shown, in this embodiment, the mounting plate 110 includes two working areas, each fixing two height valves 300. Each working area is equipped with a servo motor 1, a rotating component 2, a connecting rod 5, and a control module 200. Each working area undergoes an independent durability test. It should be noted that this embodiment does not limit the working area of ​​the mounting plate 110. That is, the mounting plate 110 provided in this embodiment as a reference includes two working areas. In other embodiments, the mounting plate 110 can be expanded to divide more working areas so that more height valves 300 can be tested simultaneously.

[0036] refer to Figure 1 As shown, as a preferred embodiment, the durability testing device provided by this utility model can use a servo motor 1 as the drive unit. The output shaft of the servo motor 1 is tightly connected to the rotating component 2 by screws 3. Guide holes 6 are provided at both ends of the connecting rod 5. Guide holes 6 are also provided at the connection between the drive rod 350 and the connecting rod 5. A pin 7 is set in the guide hole 6 to hinge the connecting rod 5, the drive rod 350, and the rotating component 2 to form a linkage mechanism. When the servo motor 1 is in working state, the output shaft rotates, which drives the rotating component 2, which is tightly connected to it, to rotate around the screw 3. The rotation of the rotating component 2 drives the linkage mechanism to move, which drives the drive rod 350 to reciprocate and swing to simulate the height change of the height valve 300 in actual operation.

[0037] Furthermore, to precisely control the testing frequency, refer to Figure 1 As shown, in a preferred embodiment of the present invention, the durability testing device includes a control module 200, which is electrically connected to the servo motor 1 and configured to control the test frequency. That is, the test frequency is adjusted by changing the rotation speed of the servo motor 1 to change the reciprocating swing frequency of the drive rod 350. In addition, the control module 200 can also be configured to record the number of reciprocating swings of the drive rod 350, with one reciprocating swing of the height valve 300 drive rod 350 constituting one test cycle, thereby recording the service life of the height valve 300.

[0038] Continue to refer to Figure 1 As shown, the height valve 300 under test includes a drive rod 350, a valve body 310, an air inlet port 320, a spring-loaded port 330, and an exhaust port 340. As a preferred embodiment, when performing a durability test on the height valve 300, the spring-loaded port 330 is connected to an air storage cylinder to simulate an air spring, the air inlet port 320 is connected to an air source through a pipe 230 to provide compressed air, and the drive rod 350 reciprocates to simulate changes in height.

[0039] Preferably, the durability testing apparatus provided in this embodiment of the present invention includes a pressure detection module, as shown in the reference. Figure 1As shown, the air pressure detection module includes a pressure sensor 210 and a solenoid valve 220 installed on a pipe 230 connected to the air inlet port 320. The pressure sensor 210 is installed between the air inlet port 320 and the solenoid valve 220. Both the solenoid valve 220 and the pressure sensor 210 are electrically connected to the control module 200.

[0040] To reduce testing errors and promptly detect the status of the height valve 300, preferably, in this embodiment, the control module 200 may further include an anomaly detection unit. The anomaly detection unit determines whether the height valve 300 under test has entered a fatigue mode based on whether the change in data from the pressure sensor 210 exceeds a preset threshold range within a preset time. When the height valve 300 enters a fatigue mode, the drive unit is controlled to stop the test. For example, in this embodiment, the anomaly detection unit is configured to test the airtightness of the valve body 310, with a detection interval set to 5000 test cycles. That is, every 5000 test cycles, the anomaly detection unit performs an airtightness test on the height valve 300 under test. In this embodiment, during the airtightness test, the drive rod 350 of the height valve 300 is in the initial position, the inlet valve and exhaust valve inside the valve body 310 are closed, the control module 200 controls the servo motor 1 to pause the durability test, and opens the solenoid valve 220 to pressurize the inlet port 320. When the pressure reaches 600 kPa, the solenoid valve 220 closes to maintain the pressure in the valve body 310, and the pressure leakage is detected by the pressure sensor 210. The fatigue mode judgment principle and process are as follows:

[0041] During testing, the intake and exhaust valves are closed. Gas entering through the intake port 320 cannot enter the valve body 310 due to the intake valve's action. The solenoid valve 220 is opened to allow gas to pressurize the pipeline 230 connected to the intake port 320. Once the target pressure difference is reached, the solenoid valve 220 is closed to maintain the pressure in the pipeline 230. At this time, the pressure leakage detected by the pressure sensor 210 is used to determine whether the intake valve is damaged, resulting in compromised airtightness. If the pressure sensor 210 detects a pressure leakage of less than 3 kPa / min, the airtightness is normal, and the durability test continues. If the pressure sensor 210 detects a pressure leakage of more than 3 kPa / min, the airtightness is abnormal, the test is stopped, and the service life of the height valve 300 is recorded.

[0042] It should be noted that this application does not limit the detection interval and detection requirements. That is, in this embodiment, the detection interval is set to 5000 test cycles and the airtightness abnormality threshold is set to 3 kPa / min. In some other embodiments, the detection interval can be set according to the expected service life of the height valve 300, and the detection requirements can also be set according to the actual performance requirements of the height valve 300.

[0043] In summary, this utility model provides a durability testing device for fatigue testing of height valves. The height valve includes a drive rod, and the durability testing device includes a servo motor, a rotating component, and a connecting rod. The connecting rod is rotatably connected to the drive rod and the rotating component via a pin. By changing the position of the connecting rod connected in the axially arranged groove of the rotating component, the reciprocating swing angle range of the height valve drive rod can be adjusted to adapt to different specifications of height valves. The durability testing device may also include a control module and a pressure detection module. The control module is configured to control the operating frequency of the drive unit and includes an anomaly detection unit for determining whether the height valve has entered fatigue mode based on the detection data from the pressure detection module. The durability testing device also includes a base with a mounting plate. The mounting plate has mounting holes for fixing height valves of different specifications, and the mounting plate includes multiple working areas to simultaneously fix multiple height valves for simultaneous independent testing of multiple height valves. This solves the problems of limited testing objects and poor compatibility in existing height valve durability testing devices and improves testing efficiency.

[0044] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A durability testing apparatus for driving a height valve to perform a durability test, the height valve comprising a valve body and a drive rod, the drive rod controlling the valve body to perform an air venting and inflation operation by rotation, characterized in that, The durability testing device includes: a drive unit, a rotating component, and a connecting rod; The drive rod is connected to the rotating component via the connecting rod; the rotating component, the connecting rod, and the drive rod are connected to form a linkage mechanism, and the drive unit is configured to drive the rotating component to rotate so as to drive the drive rod to reciprocate through the connecting rod; The connecting rod is movably connected vertically relative to the rotating component, such that the connecting rod is horizontal and connected to the drive rod in the initial position.

2. The durability testing apparatus according to claim 1, characterized in that, The rotating component has a sliding groove arranged along the axial direction. The connecting rod moves up and down in the sliding groove to change its connection position with the rotating component, thereby changing the angle range of the reciprocating swing of the drive rod.

3. The durability testing apparatus according to claim 2, characterized in that, The rotating component is provided with a locking component, which is configured to fix the connection position of the connecting rod and the rotating component in the slide groove when the angle of the reciprocating swing of the drive rod reaches the target range.

4. The durability testing apparatus according to claim 1, characterized in that, The durability testing apparatus also includes a control module electrically connected to the drive unit and configured to control the rotational speed of the drive unit and record the number of reciprocating swings of the drive rod.

5. The durability testing apparatus according to claim 4, characterized in that, The valve body is connected to a gas source via a pipeline. The durability testing device also includes a gas pressure detection module, which comprises a pressure sensor and a solenoid valve installed on the pipeline. The pressure sensor is located between the valve body and the solenoid valve.

6. The durability testing apparatus according to claim 5, characterized in that, The control module is also electrically connected to the pressure sensor and the solenoid valve, and is used to receive signals from the pressure sensor and control the opening and closing of the solenoid valve; wherein, The control module includes an anomaly detection unit, which determines whether the height valve has entered fatigue mode based on whether the change in the pressure sensor data exceeds a preset threshold range within a preset time, and controls the drive unit to stop working when the height valve enters fatigue mode.

7. The durability testing apparatus according to claim 1, characterized in that, The durability testing apparatus also includes a base with a mounting plate having multiple mounting holes to accommodate the installation of height valves of different specifications.

8. The durability testing apparatus according to claim 7, characterized in that, The mounting plate includes multiple working areas for fatigue testing of multiple height valves, and each working area is provided with a drive unit, a rotating component and a connecting rod.

9. The durability testing apparatus according to claim 1, characterized in that, The drive unit includes a servo motor, and the output shaft of the servo motor is tightly connected to the rotating component.

10. The durability testing apparatus according to claim 1, characterized in that, The connecting rod and the driving rod, as well as the connecting rod and the rotating component, are rotatably connected by pins.

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