High-low pressure gas spring oil seal tightness test box for automobile suspension system

Abstract

The invention belongs to the technical field of oil seal leakproofness test, and particularly relates to a high-low pressure gas spring oil seal leakproofness test box for an automobile suspension system, the high-low pressure gas spring oil seal leakproofness test box comprises a seal test device and a pressure balance system, the seal test device comprises a box body, a partition plate, an upper cover plate, a lower sleeve and a reinforcing mechanism; a box plate is in shaft connection with the upper portion of the box body, a display screen and a plurality of buttons are fixed to one side of the box body, the partition plate is fixedly installed on the inner wall of the box body, the lower sleeve is fixedly installed in the middle of the partition plate, the inner wall of the partition plate is slidably connected with an air pressure plate, an air pressure rod is fixed to the lower portion of the air pressure plate, and a hole is formed in the middle of the partition plate. According to the device, the problems that the test quality is influenced by a gap generated between an oil seal and a simulated gas spring due to the inaccurate simulation environment of the gas spring oil seal during the current oil seal tightness test, and the accuracy of a test result is greatly influenced by looseness caused by the fact that the simulated gas spring cannot be reinforced in the process are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil seal sealing test, and in particular relates to a high and low pressure gas spring oil seal sealing test box for an automobile suspension system. Background Art

[0002] The main function of the gas spring oil seal test is to ensure its sealing performance and durability, so as to ensure the normal operation of the gas spring and extend its service life. However, for this kind of test, such as the high and low pressure gas spring oil seal durability and sealing test box with application number 202410458987.5, it is impossible to make corresponding protective measures for the instantaneous high pressure and gradual pressurization during the test. The two tests of instantaneous high pressure and gradual pressurization can further improve the test quality of the oil seal. This leads to the influence of the tightness of the simulated gas spring during the high pressure test, resulting in looseness, which greatly affects the accuracy of the test results. This phenomenon has become a problem that needs to be solved urgently by people in this field. Summary of the invention

[0003] The object of the present invention is to provide a high and low pressure gas spring oil seal sealing test box for automobile suspension system to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a high and low pressure gas spring oil seal sealing test box for automobile suspension system, comprising a sealing test device and a pressure balance system, wherein the sealing test device comprises a box body, a partition, an upper cover plate, a lower sleeve and a reinforcement mechanism; the upper shaft of the box body is connected with a box plate, a display screen and a plurality of buttons are fixed on one side of the box body, the partition plate is fixedly installed on the inner wall of the box body, the lower sleeve is fixedly installed in the middle of the partition plate, and the inner wall is slidably connected with a gas pressure plate, a gas pressure rod is fixed below the gas pressure plate, a hole is provided in the middle of the partition plate, and the gas pressure rod is slidably connected in the hole, a gas pressure pump is connected to the bottom pipeline of the lower sleeve, a placement groove is provided on the upper surface of the lower sleeve, an oil seal is placed in the placement groove, a docking groove is provided at the bottom of the upper cover plate, and is located directly above the lower sleeve, the lower sleeve is connected to the upper cover plate through a reinforcement mechanism, and the reinforcement mechanism is connected to the inner wall of the box body, and a liquid inlet pipe and a liquid outlet pipe are connected above the box body.

[0005] The present invention further illustrates that the reinforcement mechanism includes four clamping parts, and the four clamping parts each include a connecting block 1, a connecting block 2, a connecting rod, a slide rail, a slider, a push-pull plate, a hydraulic chamber, a hydraulic plate and a hydraulic rod; the connecting block 1 is axially connected to one side of the upper cover plate, a through hole is provided in the middle of the connecting block 1, the upper surface of the connecting block 2 and the bottom of the lower sleeve are in contact with each other, and are slidably connected to the inner wall of the through hole of the connecting block 1 through the connecting rod, four notches are evenly opened around the surface of the partition, the slide rail is fixedly installed in the notch, the slider is slidably connected to the inner wall of the slide rail, and a support rod is axially connected between the top and the bottom of the connecting block 2, the push-pull plate is fixedly installed at the bottom of the slider, the hydraulic chamber is fixedly installed on the inner wall of the box, the hydraulic plate is slidably connected to the inner wall of the hydraulic chamber, the inner side of the hydraulic plate is fixedly connected to the outer side of the push-pull plate through the hydraulic rod, and the outer pipeline of the hydraulic chamber is connected to a hydraulic pump.

[0006] The present invention further illustrates that the pressure balance system is arranged in the display screen and is electrically connected to the button. The pressure balance system includes an air pressure control module and a hydraulic control module. The air pressure control module is electrically connected to the air pressure pump, the hydraulic control module is electrically connected to the hydraulic pump, and the air pressure control module is electrically connected to the hydraulic control module; the hydraulic control module is used to control the hydraulic value of the hydraulic pump, and the air pressure control module is used to control the air pressure value of the air pressure pump.

[0007] The present invention further describes that the hydraulic control module includes a hydraulic measuring unit and an air pressure mode unit, the hydraulic measuring unit is electrically connected to the air pressure mode unit, the air pressure mode unit is used to measure the air pressure mode of the air pump, including gradual increase in air pressure and instantaneous increase in air pressure, and the hydraulic measuring unit is used to calculate the hydraulic size of the hydraulic pump according to the two air pressure modes.

[0008] The present invention further illustrates that the conversion method between the hydraulic pressure measurement unit and the air pressure mode unit is: , is the hydraulic pressure size of the hydraulic pump, is the maximum hydraulic pressure of the hydraulic pump, The air pressure of the air pump is gradually increased. is the maximum air pressure of the air pump, It is the air pressure generated by the instantaneous increase in air pressure of the air pump.

[0009] The present invention further illustrates that a toothed disk is fixed to the bottom end of the pneumatic rod, and eight push rods are evenly fixed to the outside of the pneumatic rod, wherein large balls are fixed to the upper ends of four of the push rods, and small balls are fixed to the upper ends of the other four push rods, the large balls are adjacent to the small balls, and a top groove is provided on the surface of the push-pull plate, and the inner side of the top groove is arc-shaped, and after the top groove moves inward and the push rod moves upward, the large balls and the small balls contact the arc shape of the top groove; a motor is fixed to the bottom of the inner wall of the box body, and a gear is fixedly connected to the output end of the motor, and the gear is meshed with the toothed disk, and the thickness of the gear is greater than the thickness of the toothed disk.

[0010] The present invention further illustrates that the air pressure mode unit is electrically connected to the motor, and the air pressure mode unit is also used to control the rotation angle of the motor according to two modes: gradual increase in air pressure and instantaneous increase in air pressure.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention injects gas into the lower sleeve through an air pressure pump, and air pressure is generated at the bottom of the air pressure plate, thereby moving upward along the inner wall of the lower sleeve, so that the air pressure plate generates pressure, thereby performing a high-pressure test on the gas spring oil seal, and conversely, after the gas at the bottom of the air pressure plate is extracted, low pressure is generated above the air pressure plate, thereby performing a low-pressure test on the gas spring oil seal, and by identifying whether there are bubbles in the soapy water, it is determined whether the oil seal will leak, and the sealing performance of the gas spring oil seal in high and low pressure environments is tested, and the gas spring simulation environment is automatically started by the air pressure pump and the hydraulic pump, and the efficiency of the automated test is greatly improved, and the upper cover plate and the lower sleeve are closed by hydraulic pressure, and the tightness is greatly improved, so that the sealing performance is greatly improved, so that the test data is more accurate; Through the pressure balance system, during high-pressure testing, the high-pressure simulation mode can be selected through button control. You can choose between instantaneous high-pressure testing and gradual high-pressure testing. The instantaneous high-pressure test is when the air pump injects gas pressure into the lower sleeve and increases instantly. The gradual high-pressure test is when the air pump gradually injects gas into the lower sleeve and the air pressure gradually increases. The oil seal sealing performance of instantaneous high pressure and gradual pressurization under high-pressure environment can be measured respectively, and the test effect is better. On the one hand, when the air pressure of the air pump gradually increases, the tightness of the upper cover plate and the lower sleeve can be guaranteed, and the two will not loosen. On the other hand, when the pressure of the air pump increases instantly, the upper cover plate and the lower sleeve will not loosen either, which can fully guarantee the accuracy of the test environment. The arc-shaped part of the top groove is squeezed by a large ball or a small ball, so that the push-pull plate is moved further inward, thereby further strengthening the tightness of the upper cover plate and the lower sleeve through connecting blocks 1 and 2, further improving the accuracy of the test environment, and as the high-voltage test proceeds, the upward force on the upper cover plate gradually increases, which can greatly strengthen the fastening force on the upper cover plate and the lower sleeve and fully prevent the loosening of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the box of the present invention; Figure 3 It is a structural schematic diagram of the reinforcement mechanism of the present invention; Figure 4 is a schematic diagram of the internal structure of the lower sleeve of the present invention; Figure 5 It is a schematic diagram of the meshing relationship between the gear and the toothed disc of the present invention; Figure 6 It is a schematic diagram of the structural operation process of the present invention; Figure 7 It is a schematic diagram of the module connection relationship of the pressure balance system of the present invention; In the figure: 1. box body; 11. box plate; 2. partition; 21. notch; 3. upper cover; 31. docking groove; 32. connecting block 1; 4. lower sleeve; 41. air pressure plate; 42. air pressure rod; 421. gear plate; 422. push rod; 423. big ball; 424. small ball; 43. placement groove; 44. connecting block 2; 5. display screen; 6. button; 7. support rod; 8. connecting rod; 81. slide rail; 811. slider; 812. push-pull plate; 82. hydraulic chamber; 821. hydraulic plate; 822. hydraulic rod; 83. top groove; 9. motor; 91. gear. DETAILED DESCRIPTION

[0013] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and 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.

[0014] See also Figure 1-Figure 7 The present invention provides a technical solution: a high and low pressure gas spring oil seal sealing test box for automobile suspension system, including a sealing test device and a pressure balance system, the sealing test device includes a box body 1, a partition plate 2, an upper cover plate 3, a lower sleeve 4 and a reinforcement mechanism; The upper axis of the box body 1 is connected to the box plate 11, a display screen 5 and a plurality of buttons 6 are fixed to one side of the box body 1, the partition 2 is fixedly installed on the inner wall of the box body 1, the lower sleeve 4 is fixedly installed in the middle of the partition 2, and the inner wall is slidably connected to the air pressure plate 41, a pneumatic rod 42 is fixed below the air pressure plate 41, a hole is provided in the middle of the partition 2, and the pneumatic rod 42 is slidably connected in the hole, the bottom pipe of the lower sleeve 4 is connected to the air pressure pump, the upper surface of the lower sleeve 4 is provided with a placement groove 43, an oil seal is placed in the placement groove 43, a docking groove 31 is provided at the bottom of the upper cover plate 3, and is located directly above the lower sleeve 4, the lower sleeve 4 is connected to the upper cover plate 3 through a reinforcement mechanism, and the reinforcement mechanism is connected to the inner wall of the box body 1, and a liquid inlet pipe and a liquid outlet pipe are connected above the box body 1.

[0015] The reinforcement mechanism includes four clamping parts, each of which includes a connecting block 1 32, a connecting block 2 44, a connecting rod 8, a slide rail 81, a slider 811, a push-pull plate 812, a hydraulic chamber 82, a hydraulic plate 821 and a hydraulic rod 822; The connecting block 1 32 is axially connected to one side of the upper cover plate 3, a through hole is provided in the middle of the connecting block 1 32, the upper surface of the connecting block 2 44 fits with the bottom of the lower sleeve 4, and is slidably connected to the inner wall of the through hole of the connecting block 1 32 through the connecting rod 8, four notches 21 are evenly opened around the surface of the partition 2, the slide rail 81 is fixedly installed in the notch 21, the slider 811 is slidably connected to the inner wall of the slide rail 81, and a support rod 7 is axially connected between the top and the bottom of the connecting block 2 44, the push-pull plate 812 is fixedly installed at the bottom of the slider 811, the hydraulic chamber 82 is fixedly installed on the inner wall of the box body 1, the hydraulic plate 821 is slidably connected to the inner wall of the hydraulic chamber 82, the inner side of the hydraulic plate 821 is fixedly connected to the outer side of the push-pull plate 812 through the hydraulic rod 822, and the outer pipeline of the hydraulic chamber 82 is connected to the hydraulic pump; Put the oil seal into the placement groove 43, then press the button 6, soapy water is injected into the box body 1 through the liquid inlet pipe, so that it covers the upper cover plate 3, the hydraulic pump is running, and liquid is injected into the hydraulic chamber 82, and hydraulic pressure is generated on the outer side of the hydraulic plate 821, so that the push-pull plate 812 is driven to move inward through the hydraulic rod 822, and the push-pull plate 812 drives the slider 811 to slide inward along the inner wall of the slide rail 81, and the connecting block 2 44 is supported by the support rod 7, so that the connecting block 2 44 is rotated through the axis, and the inner end of the connecting block 2 44 squeezes the bottom of the lower sleeve 4 to make it move upward, and at the same time, the connecting block 2 44 drives the connecting block 1 32 through the connecting rod 8, so that the connecting block 1 32 is rotated through the axis Rotate, thereby pulling the upper cover plate 3 to move downward, the upper cover plate 3 and the lower sleeve 4 squeeze the oil seal, and thus merge to seal, simulating a gas spring, and then the air pressure pump runs, injecting gas into the lower sleeve 4, and air pressure is generated at the bottom of the air pressure plate 41, so that it moves upward along the inner wall of the lower sleeve 4, so that the air pressure plate 41 generates pressure, thereby performing a high-pressure test on the gas spring oil seal, on the contrary, after the gas at the bottom of the air pressure plate 41 is extracted, low pressure is generated above the air pressure plate 41, thereby performing a low-pressure test on the gas spring oil seal, by identifying whether there are bubbles in the soapy water, it is possible to determine whether the oil seal will leak, and the sealing performance of the gas spring oil seal under high and low pressure environments is tested; The pneumatic pump and the hydraulic pump are used to automatically start the gas spring simulation environment, which greatly improves the efficiency of the automated test. The upper cover plate 3 and the lower sleeve 4 are closed by hydraulic pressure, which greatly improves the tightness and the sealing, thereby making the test data more accurate.

[0016] The pressure balance system is arranged in the display screen 5 and is electrically connected to the button 6. The pressure balance system includes an air pressure control module and a hydraulic control module. The air pressure control module is electrically connected to the air pressure pump, the hydraulic control module is electrically connected to the hydraulic pump, and the air pressure control module is electrically connected to the hydraulic control module. The hydraulic control module is used to control the hydraulic pressure value of the hydraulic pump, and the air pressure control module is used to control the air pressure value of the air pressure pump.

[0017] The hydraulic control module includes a hydraulic pressure calculation unit and an air pressure mode unit. The hydraulic pressure calculation unit is electrically connected to the air pressure mode unit. The air pressure mode unit is used to calculate the air pressure mode of the air pressure pump, including gradual air pressure increase and instantaneous air pressure increase. The hydraulic pressure calculation unit is used to calculate the hydraulic pressure size of the hydraulic pump according to the two air pressure modes. By pressing button 6, the pressure balance system is operated, the hydraulic control module is operated first, and the hydraulic pump is controlled, so as to close the upper cover plate 3 and the lower sleeve 4, close the oil seal, and simulate the test environment, and then the air pressure control module is operated to control the air pressure pump, so as to perform the sealing test of the high and low pressure gas spring oil seal; During high-pressure testing, the high-pressure simulation mode is selected through button 6 control, and you can choose between instantaneous high-pressure testing and gradual high-pressure testing. The instantaneous high-pressure test is when the air pressure pump injects gas into the lower sleeve 4 and the pressure increases instantly. The gradual high-pressure test is when the air pressure pump gradually injects gas into the lower sleeve 4 and the air pressure increases gradually. The oil seal sealing performance under instantaneous high pressure and gradual pressurization under high-pressure environment can be measured respectively, and the test effect is better.

[0018] The conversion method between hydraulic pressure measurement unit and air pressure mode unit is: , is the hydraulic pressure size of the hydraulic pump, is the maximum hydraulic pressure of the hydraulic pump, The air pressure of the air pump is gradually increased. is the maximum air pressure of the air pump, The air pressure generated by the instantaneous increase in air pressure of the air pump; The two modes of gradually increasing the pressure and instantly increasing the pressure of the air pump increase the hydraulic value of the hydraulic pump accordingly. By combining the two data of gradually increasing the pressure and instantly increasing the pressure of the air pump, the greater the pressure of the air pump, the greater the hydraulic pressure of the hydraulic pump. At the same time, the pressure of the air pump is further enhanced by combining the gradual increase of the pressure and the instantaneous increase of the pressure, so that the hydraulic pressure of the hydraulic pump is greatly improved, and the hydraulic pressure of the hydraulic pump is strengthened to the greatest extent. On the one hand, when the air pressure of the air pump is gradually increased, the tightness of the upper cover plate 3 and the lower sleeve 4 can be guaranteed, and the two will not loosen. On the other hand, when the pressure of the air pump is instantly increased, the upper cover plate 3 and the lower sleeve 4 will not loosen, which can fully guarantee the accuracy of the test environment.

[0019] A toothed disc 421 is fixed to the bottom end of the gas pressure rod 42, and eight push rods 422 are evenly fixed to the outside of the gas pressure rod 42, wherein large balls 423 are fixed to the upper ends of four push rods 422, and small balls 424 are fixed to the upper ends of the other four push rods 422, and the large balls 423 are adjacent to the small balls 424. A top groove 83 is provided on the surface of the push-pull plate 812, and the inner side of the top groove 83 is in an arc shape. After the top groove 83 moves inward and the push rod 422 moves upward, the large balls 423 and the small balls 424 are in contact with the arc shape of the top groove 83; A motor 9 is fixed to the bottom of the inner wall of the box body 1, and a gear 91 is fixedly connected to the output end of the motor 9, and the gear 91 is meshed with the toothed disc 421, and the thickness of the gear 91 is greater than the thickness of the toothed disc 421; During the high-pressure test, as the amount of gas injected into the lower sleeve 4 by the air pressure pump increases, the air pressure plate 41 slides upward along the inner wall of the lower sleeve 4, driving the air pressure rod 42 to move upward, and the air pressure rod 42 drives the toothed disc 421 to move upward. Since the thickness of the gear 91 is greater than the thickness of the toothed disc 421, the toothed disc 421 will not be disengaged from the gear 91. During this process, the air pressure rod 42 drives the top rod 422 to move upward, thereby driving the large ball 423 or the small ball 424 to move upward and enter the top groove 83. The large ball 423 or the small ball 424 squeezes the arc portion of the top groove 83, thereby moving the push-pull plate 812 further inward, thereby further strengthening the tightness of the upper cover plate 3 and the lower sleeve 4 through the connecting block 1 32 and the connecting block 2 44, and further improving the accuracy of the test environment; As the high-voltage test proceeds, the upward force on the upper cover plate 3 gradually increases, thereby greatly strengthening the fastening force on the upper cover plate 3 and the lower sleeve 4, and fully preventing the two from loosening.

[0020] The air pressure mode unit is electrically connected to the motor 9, and the air pressure mode unit is also used to control the rotation angle of the motor 9 according to two modes: gradual increase of air pressure and instantaneous increase of air pressure; The motor 9 is controlled by two modes of gradual increase of air pressure and instantaneous increase of air pressure measured by the air pressure mode unit; When the air pressure gradually increases: the motor 9 remains stationary, and the ball 424 enters the top groove 83 at this time. The fastening force between the upper cover plate 3 and the lower sleeve 4 is relatively small, so as to avoid excessive pressure causing increased wear of the structure and the bottom of the lower sleeve 4 and affecting the service life. Anyway, after the lower sleeve 4 is excessively worn, the connecting block 2 44 slips, making it impossible to close the upper cover plate 3 and the lower sleeve 4; When the air pressure increases instantaneously: the motor 9 rotates forty-five degrees, and the large ball 423 enters the top groove 83 at this time. The fastening force between the upper cover plate 3 and the lower sleeve 4 is relatively large, which avoids the loosening between the upper cover plate 3 and the lower sleeve 4 caused by instantaneous impact, thereby ensuring the accuracy of the test environment. After the high-pressure test is completed, when the low-pressure test is carried out, the motor 9 is controlled to reset.

[0021] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. High and low pressure gas spring oil seal sealing test box for automobile suspension system, including sealing test equipment and pressure balance system, characterized by: The sealing test equipment comprises a box body (1), a partition (2), an upper cover plate (3), a lower sleeve (4) and a reinforcement mechanism; The upper axis of the box body (1) is connected to a box plate (11), a display screen (5) and a plurality of buttons (6) are fixed to one side of the box body (1), the partition (2) is fixedly mounted on the inner wall of the box body (1), the lower sleeve (4) is fixedly mounted in the middle of the partition (2), and the inner wall is slidably connected to a gas pressure plate (41), a gas pressure rod (42) is fixed below the gas pressure plate (41), a hole is provided in the middle of the partition (2), and the gas pressure rod (42) is slidably connected to the inner wall In the hole, a bottom pipe of the lower sleeve (4) is connected to an air pressure pump, an upper surface of the lower sleeve (4) is provided with a placement groove (43), an oil seal is placed in the placement groove (43), a docking groove (31) is provided at the bottom of the upper cover plate (3) and is located directly above the lower sleeve (4), the lower sleeve (4) is connected to the upper cover plate (3) via a reinforcement mechanism, and the reinforcement mechanism is connected to the inner wall of the box body (1), and a liquid inlet pipe and a liquid outlet pipe are connected above the box body (1).

2. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 1, characterized in that: The reinforcement mechanism comprises four clamping parts, each of which comprises a connecting block 1 (32), a connecting block 2 (44), a connecting rod (8), a slide rail (81), a sliding block (811), a push-pull plate (812), a hydraulic chamber (82), a hydraulic plate (821) and a hydraulic rod (822); The connecting block 1 (32) is axially connected to one side of the upper cover plate (3); a through hole is provided in the middle of the connecting block 1 (32); the upper surface of the connecting block 2 (44) is fitted with the bottom of the lower sleeve (4) and is slidably connected to the inner wall of the through hole of the connecting block 1 (32) via a connecting rod (8); four notches (21) are evenly arranged around the surface of the partition plate (2); the slide rail (81) is fixedly installed in the notch (21); and the slider (811) is slidably connected to the slide rail (81). The push-pull plate (812) is fixedly mounted on the bottom of the slider (811); the hydraulic chamber (82) is fixedly mounted on the inner wall of the box body (1); the hydraulic plate (821) is slidably connected to the inner wall of the hydraulic chamber (82); the inner side of the hydraulic plate (821) is fixedly connected to the outer side of the push-pull plate (812) via a hydraulic rod (822); and the outer pipeline of the hydraulic chamber (82) is connected to a hydraulic pump.

3. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 2, characterized in that: The pressure balance system is arranged in the display screen (5) and is electrically connected to the button (6), the pressure balance system comprises an air pressure control module and a hydraulic control module, the air pressure control module is electrically connected to the air pressure pump, the hydraulic control module is electrically connected to the hydraulic pump, and the air pressure control module is electrically connected to the hydraulic control module; The hydraulic control module is used to control the hydraulic pressure value of the hydraulic pump, and the air pressure control module is used to control the air pressure value of the air pressure pump.

4. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 3, characterized in that: The hydraulic control module includes a hydraulic measurement unit and an air pressure mode unit. The hydraulic measurement unit is electrically connected to the air pressure mode unit. The air pressure mode unit is used to measure the air pressure mode of the air pump, including gradual increase in air pressure and instantaneous increase in air pressure. The hydraulic measurement unit is used to calculate the hydraulic size of the hydraulic pump according to the two air pressure modes.

5. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 4, characterized in that: The conversion method between the hydraulic pressure measurement unit and the air pressure mode unit is: , is the hydraulic pressure size of the hydraulic pump, is the maximum hydraulic pressure of the hydraulic pump, The air pressure of the air pump is gradually increased. is the maximum air pressure of the air pump, It is the air pressure generated by the instantaneous increase in air pressure of the air pump.

6. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 5, characterized in that: A toothed disc (421) is fixed at the bottom end of the pneumatic rod (42), and eight push rods (422) are evenly fixed on the outer side of the pneumatic rod (42), wherein large balls (423) are fixed at the upper ends of four of the push rods (422), and small balls (424) are fixed at the upper ends of the other four of the push rods (422), wherein the large balls (423) are adjacent to the small balls (424), and a top groove (83) is provided on the surface of the push-pull plate (812), wherein the inner side of the top groove (83) is in an arc shape, and when the top groove (83) moves inward and the push rod (422) moves upward, the large balls (423) and the small balls (424) contact the arc shape of the top groove (83); A motor (9) is fixed to the bottom of the inner wall of the box body (1); a gear (91) is fixedly connected to the output end of the motor (9); the gear (91) and the toothed disc (421) are meshed with each other; and the thickness of the gear (91) is greater than the thickness of the toothed disc (421).

7. The high and low pressure gas spring oil seal sealing test box for automobile suspension system according to claim 6, characterized in that: The air pressure mode unit is electrically connected to the motor (9), and the air pressure mode unit is also used to control the rotation angle of the motor (9) according to two modes: gradual increase in air pressure and instantaneous increase in air pressure.

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