Damper oil injection vacuum-pumping system

Abstract

The utility model discloses a shock absorber oiling and vacuumizing system which comprises a vacuum pump and a shock absorber body. A vacuum pumping system and a switch valve are sequentially connected between the vacuum pump and the shock absorber body through a vacuum pumping main pipe, and an oil discharging system connected with the vacuum pumping system in parallel is arranged on the portion, between the switch valve and the vacuum pump, of the vacuum pumping main pipe through an oil discharging pipe. The part, located between the switch valve and the shock absorber body, of the vacuumizing main pipe is communicated with the oil supply system through an oil injection pipe, and a circulating oil way is formed between the oil discharge system and the oil supply system through a backflow pipe. According to the utility model, the production and detection cost of enterprises can be reduced, and the subsequent detection efficiency of shock absorbers is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to an oil filling and vacuum pumping system for shock absorbers. Background Art

[0002] To rapidly attenuate vibrations between the vehicle frame and body, improving ride smoothness and comfort, automobile suspension systems are typically equipped with shock absorbers. Double-acting, cylindrical shock absorbers are widely used. Shock absorbers are vulnerable parts during vehicle use, and their performance directly impacts the vehicle's ride stability and the lifespan of other components. Therefore, it's crucial to test shock absorbers after production to ensure their performance meets test standards.

[0003] Existing shock absorbers lack a complete system that can both vacuum and oil the shock absorber during testing, resulting in high production and testing costs for enterprises and low efficiency in subsequent shock absorber testing. Therefore, this application provides a shock absorber oiling and vacuuming system to solve the above problems. Utility Model Content

[0004] In order to overcome the above shortcomings, the purpose of the present invention is to provide a shock absorber oil filling and vacuum pumping system, which can reduce the production and testing costs of the enterprise and improve the subsequent testing efficiency of the shock absorber.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a shock absorber oil filling and vacuum system, including a vacuum pump and a shock absorber body; the vacuum pump and the shock absorber body are connected in sequence with a vacuum system and a switch valve through a vacuum main pipe, and an oil discharge system connected in parallel with the vacuum system is provided on the vacuum main pipe between the switch valve and the vacuum pump through an oil discharge pipe. The part of the vacuum main pipe located between the switch valve and the shock absorber body is connected to the oil supply system through an oil filling pipe, and a circulating oil circuit is formed between the oil discharge system and the oil supply system through a return pipe.

[0006] Furthermore, the vacuum system includes a control valve 1, a vacuum tank 1, a control valve 2, and a pressure gauge, which are sequentially arranged toward the shock absorber body. A vacuum pressure sensor is disposed between the control valve 2 and the vacuum tank 1. When the vacuum system begins operation, both the control valve 1 and the control valve 2 are opened, the vacuum pump is turned on, and the on-off valve on the vacuum main pipe is opened. At this point, the interior of the shock absorber body can be vacuumed. During this process, oil extracted from the shock absorber body flows into the vacuum tank 1 and is collected. This prevents the oil from directly entering the vacuum pump through the vacuum main pipe and causing damage to the vacuum pump, while also reducing oil waste.

[0007] Furthermore, the oil supply system includes an oil tank, within which the oil filling pipe, at its end remote from the vacuum main pipe, is located. The oil filling pipe, facing toward the shock absorber body, is sequentially provided with an oil filling pump, a one-way valve, an oil filling pressure regulating assembly, and an on-off valve. After the shock absorber body is vacuumed, the on-off valve on the oil filling pipe opens, and the oil supply system begins operation. The oil filling pump draws oil from the tank into the shock absorber body through the oil filling pipe, allowing subsequent performance testing after the shock absorber body is filled with oil. After oil supply is complete, the on-off valve on the oil filling pipe is closed.

[0008] Furthermore, the oil drain system includes a third control valve, a second vacuum tank, and a fourth control valve, which are connected by an oil drain pipe and arranged in sequence toward the shock absorber body. A vacuum pressure sensor is provided between the second vacuum tank and the fourth control valve. After the shock absorber body is inspected, the oil drain system begins to operate, draining the oil from the shock absorber body. The first control valve of the vacuum system is closed. At this time, the third and fourth control valves of the oil drain system are both opened, and the vacuum pump draws the oil from the shock absorber body through a portion of the vacuum main pipe and the oil drain pipe into the second vacuum tank for centralized collection, thereby avoiding waste of the oil extracted from the shock absorber body.

[0009] Furthermore, a return pipe 1 and a return pipe 2 are respectively provided at the bottom of the vacuum tank 1 and vacuum tank 2. The ends of the return pipe 1 and return pipe 2 away from the vacuum tank 1 and vacuum tank 2 are both connected to the return pipe, and the ends of the return pipe away from the return pipe 1 and return pipe 2 are located in the oil tank. The return pipe 1 and return pipe 2 can respectively transport and collect the oil stored in the vacuum tank 1 and vacuum tank 2 to the return pipe, and then return it to the oil tank through the return pipe, realizing the recycling of the oil and effectively reducing the production and testing costs of the enterprise.

[0010] Furthermore, a liquid level sensor is provided inside each of the vacuum tanks 1 and 2.

[0011] Furthermore, each of the return pipe 1 and the return pipe 2 is provided with a control valve 5. A liquid level sensor can sense the height of the oil in the vacuum tank 1 and the vacuum tank 2. When the oil level reaches a set value, the control valve 5 opens, and the oil in the vacuum tank 1 and the vacuum tank 2 can automatically flow into the oil tank through the return pipe 1 and the return pipe 2, respectively, to achieve oil recycling.

[0012] Furthermore, the vacuum main pipe and the oil filling pipe are each equipped with a primary filter at one end near the vacuum pump and the oil filling pump, respectively. A high-pressure filter is installed at one end of the return pipe near the oil tank and on the oil filling pipe between the one-way valve and the oil filling pressure regulating assembly. At least one accumulator is installed on the vacuum main pipe between the on-off valve and the shock absorber body. Both the primary and high-pressure filters are designed to maintain the cleanliness of the test oil, ensuring that it consistently meets the shock absorber's testing and use standards, and preventing impurities in the oil from affecting the shock absorber's internal structure and its test results. The accumulator is designed to ensure the required energy for the entire vacuum system.

[0013] Beneficial effects of the utility model:

[0014] The vacuum pumping system, oil supply system and oil draining system of the present invention are integrated together. When inspecting the shock absorber body, the shock absorber body can be vacuumed, the oil supply is inspected and the oil is drained in sequence. The oil used for the oil supply inspection can be directly returned to the common system through the oil draining system, which reduces the waste of oil, effectively reduces the production and inspection costs of the enterprise, and improves the subsequent inspection efficiency of the shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a working principle diagram of an embodiment of the utility model;

[0016] In the figure: 1. Shock absorber body; 2. Shock absorber oil filling port; 3. Vacuum system; 31. Control valve 1; 32. Vacuum tank 1; 33. Vacuum pressure sensor; 34. Control valve 2; 4. Vacuum pump; 5. Primary filter; 6. High-pressure filter; 7. Accumulator; 8. Oil supply system; 81. Oil tank; 82. Oil filling pump; 83. Oil filling pipe; 84. Oil filling pressure regulating assembly; 85. Check valve; 9. Oil discharge system; 91. Control valve 3; 92. Vacuum tank 2; 93. Control valve 4; 94. Return pipe 1; 95. Return pipe 2; 96. Control valve 5; 11. Vacuum main pipe; 12. Oil discharge pipe; 13. Liquid level sensor. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0018] See attached Figure 1As shown, a shock absorber oil filling and vacuuming system in this embodiment includes a vacuum pump 4 and a shock absorber body 1; the vacuum pump 4 and the shock absorber body 1 are connected in sequence with a vacuum system 3 and a switch valve through a vacuum main pipe 11, and an oil discharge system 9 in parallel with the vacuum system 3 is provided on the vacuum main pipe 11 between the switch valve and the vacuum pump 4 through an oil discharge pipe 12. The opening or closing of the switch valve can control whether to vacuum the shock absorber body 1 or whether to extract the oil in the shock absorber body 1; the parallel arrangement of the vacuum system 3 and the oil discharge system 9 can ensure that the two systems can operate independently under the action of the vacuum pump 4 without interfering with each other, so that the two processes of vacuuming and oil discharge can be carried out step by step.

[0019] Before testing, the shock absorber body 1 needs to be vacuumed to completely expel the air inside. This prevents subsequent oil from entering the shock absorber body 1 and coming into contact with the air, causing it to foam and affect the resistance value of the shock absorber body 1, thereby causing the shock absorber to fail or damage. Specifically, the vacuum pump 4 starts operating, the on-off valve opens, and a vacuum is drawn inside the shock absorber body 1 through the vacuum main pipe 11. After the vacuum is completed, the on-off valve on the vacuum main pipe 11 closes.

[0020] In some embodiments, the switch valve is an electromagnetic ball valve, and both ends of the oil drain pipe 12 are connected to the vacuum main pipe 11. Specifically, one end is located between the switch valve and the second controller, and the other end is located between the control valve 1 31 and the vacuum pump 4.

[0021] The portion of the vacuum main pipe 11 located between the on-off valve and the shock absorber body 1 is connected to the oil supply system 8 via an oil filling pipe 83. The oil discharge system 9 forms an oil circulation circuit with the oil supply system 8 via a return pipe. After the vacuum system 3 completes vacuuming of the shock absorber body 1, the on-off valve on the oil filling pipe 83 opens, allowing oil to be injected into the shock absorber body 1. After the oil supply is completed, the shock absorber body 1 is then tested for performance via an external testing mechanism. It should be noted that after oil supply is completed, the on-off valve on the oil filling pipe 83 closes.

[0022] The oil can be circulated between the oil discharge system 9 and the oil supply system 8. Specifically, after the switch valve on the oil supply system 8 is closed, the switch valve on the vacuum main pipe 11 is opened. At this time, the vacuum system 3 does not work, and the oil discharge system 9 connected in parallel with it starts to work, and the vacuum pump 4 runs. The oil in the shock absorber body 1 can be sucked into the oil discharge system 9 through the oil discharge pipe 12 and the vacuum main pipe 11 connected thereto, and finally returned to the oil supply system 8 through the return pipe for subsequent recycling, which can effectively reduce the company's oil loss and reduce the company's production and testing costs.

[0023] It should be noted that the vacuum main pipe 11 is connected to the shock absorber oil filling port 2 on the shock absorber body 1 .

[0024] The vacuum system 3 includes a control valve 1 31, a vacuum tank 1 32, a control valve 2 34, and a pressure gauge, arranged in sequence toward the shock absorber body 1. A vacuum pressure sensor 33 is located between the control valve 2 34 and the vacuum tank 1 32. When the vacuum system 3 begins operation, both the control valve 1 31 and the control valve 2 34 are opened, the vacuum pump 4 is turned on, and the on-off valve on the vacuum main pipe 11 is opened. At this point, the interior of the shock absorber body 1 is vacuumed. During this process, oil drawn from the shock absorber body 1 flows into the vacuum tank 1 32 and is collected. This prevents oil from directly entering the vacuum pump 4 along the vacuum main pipe 11 and potentially damaging it, while also reducing oil waste.

[0025] The vacuum pressure sensor 33 can sense the air pressure in the shock absorber body 1 in real time. When the sensed air pressure reaches the vacuum value, the vacuum system 3 stops working, and the control valve 1 31, the control valve 2 34 and the switch valve on the vacuum main 11 are all closed.

[0026] In some embodiments, a pneumatically controlled ball valve is further provided on the top of the vacuum tank 32, and when the vacuum pumping system 3 is working, the pneumatically controlled ball valve is in a closed state.

[0027] The oil supply system 8 includes an oil tank 81. The end of the oil filling pipe, remote from the vacuum main pipe 11, is located within the oil tank 81. The oil filling pipe 83, facing toward the shock absorber body 1, is equipped with an oil filling pump 82, a one-way valve 85, an oil filling pressure regulating assembly 84, and an on-off valve. After the shock absorber body 1 is vacuumed, the on-off valve on the oil filling pipe opens, and the oil supply system 8 begins operation. The oil filling pump 82 draws the oil from the oil tank 81 into the shock absorber body 1 through the oil filling pipe 83, allowing subsequent performance testing after the shock absorber body 1 is filled with oil. After the oil supply is completed, the on-off valve on the oil filling pipe is closed.

[0028] The provision of the one-way valve 85 can prevent the oil in the shock absorber body 1 from flowing back into the oil tank 81 and affecting the detection of the shock absorber body 1 .

[0029] In some embodiments, the oil injection pressure regulating assembly 84 includes a pressure switch and a proportional relief valve, and the oil injection pressure regulating assembly 84 can stabilize the oil pressure in the entire oil supply system 8. When the oil supply system 8 is ready to supply oil, the oil injection pressure regulating assembly 84 adjusts the oil pressure to 3 MPa.

[0030] The oil drain system 9 includes a control valve 3 91, a vacuum tank 2 92, and a control valve 4 93, which are connected by an oil drain pipe 12 and arranged in sequence toward the shock absorber body 1. A vacuum pressure sensor 33 is provided between the vacuum tank 2 92 and the control valve 4 93. After the shock absorber body 1 is inspected, the oil drain system 9 begins to operate, draining the oil from the shock absorber body 1. The control valve 1 31 of the vacuum system 3 is closed. At this time, the control valve 3 91 and the control valve 4 93 of the oil drain system 9 are both open, and the vacuum pump 4 draws the oil from the shock absorber body 1 through the partial vacuum main pipe 11 and the oil drain pipe 12 into the vacuum tank 2 92 for unified collection, thus avoiding waste of the oil extracted from the shock absorber body 1.

[0031] In some embodiments, a pneumatically controlled ball valve is also provided on the top of the second vacuum tank 92 , and when the oil discharge system 9 is working, the pneumatically controlled ball valve is in a closed state.

[0032] It should be noted that during the entire operation of the shock absorber body 1, the vacuum system 3 and the oil drain pipe 12 system can work at different times by controlling the opening and closing of the control valve 1 31 and the control valve 3 91.

[0033] A return pipe 1 94 and a return pipe 2 95 are respectively provided at the bottom of vacuum tank 1 32 and vacuum tank 2 92. The ends of return pipe 1 94 and return pipe 2 95, which are remote from vacuum tank 1 32 and vacuum tank 2 92, are both connected to the return pipes. The ends of the return pipes, which are remote from return pipe 1 94 and return pipe 2 95, are located within oil tank 81. Return pipe 1 94 and return pipe 2 95 can respectively transport and collect the oil stored in vacuum tank 1 32 and vacuum tank 2 92 to the return pipes, and then return it to oil tank 81 through the return pipes, thus achieving oil recycling and effectively reducing the company's production and testing costs.

[0034] A liquid level sensor 13 is disposed inside each of the vacuum tank 1 32 and the vacuum tank 2 92 .

[0035] Both return pipe 1 94 and return pipe 2 95 are equipped with a control valve 5 96 . The liquid level sensor 13 senses the oil level in vacuum tank 1 32 and vacuum tank 2 92 . When the oil level reaches a set value, control valve 5 96 opens, allowing the oil in vacuum tank 1 32 and vacuum tank 2 92 to automatically flow into the oil tank 81 through return pipe 1 94 and return pipe 2 95 , respectively, achieving oil recycling.

[0036] A primary filter 5 is installed on both the vacuum main pipe 11 and the oil filling pipe 83, near one end of the vacuum pump 4 and the oil filling pump 82, respectively. A high-pressure filter 6 is installed on one end of the return pipe near the oil tank 81 and on the oil filling pipe 83, between the one-way valve 85 and the oil filling pressure regulating assembly 84. At least one accumulator 7 is installed on the vacuum main pipe 11, between the switch valve and the shock absorber body 1. The primary filter 5 and the high-pressure filter 6 are provided to maintain the cleanliness of the test oil, ensuring that the oil cleanliness always meets the inspection and use standards of the shock absorber body 1, and preventing impurities in the oil from affecting the interior of the shock absorber body 1 and its test results. The accumulator 7 is provided to ensure the required energy usage of the entire vacuum system 3.

[0037] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A shock absorber oil filling and vacuum system, characterized by: It includes a vacuum pump and a shock absorber body; the vacuum pump and the shock absorber body are connected in sequence to a vacuum system and a switch valve through a vacuum main pipe; an oil discharge system connected in parallel with the vacuum system is provided on the vacuum main pipe between the switch valve and the vacuum pump through an oil discharge pipe; the part of the vacuum main pipe located between the switch valve and the shock absorber body is connected to the oil supply system through an oil filling pipe, and a circulating oil circuit is formed between the oil discharge system and the oil supply system through a return pipe.

2. The shock absorber oil filling and vacuum pumping system according to claim 1, characterized in that: The vacuum pumping system includes a control valve 1, a vacuum tank 1, a control valve 2 and a pressure gauge which are sequentially arranged in a direction close to the shock absorber body, and a vacuum pressure sensor is arranged between the control valve 2 and the vacuum tank 1.

3. The shock absorber oil filling and vacuum pumping system according to claim 1, characterized in that: The oil supply system includes an oil tank, and the end of the oil filling pipe away from the vacuum main pipe is located in the oil tank. The oil filling pipe is sequentially provided with an oil filling pump, a one-way valve, an oil filling pressure regulating assembly and a switch valve in the direction close to the shock absorber body.

4. The shock absorber oil filling and vacuum pumping system according to claim 1, characterized in that: The oil drainage system includes a control valve 3, a vacuum tank 2 and a control valve 4 which are connected through an oil drainage pipe and arranged in sequence in a direction close to the shock absorber body. A vacuum pressure sensor is arranged between the vacuum tank 2 and the control valve 4.

5. The shock absorber oil filling and vacuum pumping system according to claim 2, characterized in that: A return pipe 1 and a return pipe 2 are respectively provided at the bottom of the vacuum tank 1 and the vacuum tank 2. The ends of the return pipe 1 and the return pipe 2 away from the vacuum tank 1 and the vacuum tank 2 are connected to the return pipe, and the ends of the return pipe away from the return pipe 1 and the return pipe 2 are located in the oil tank.

6. The shock absorber oil filling and vacuum pumping system according to claim 2, characterized in that: A liquid level sensor is provided inside each of the vacuum tanks 1 and 2.

7. The shock absorber oil filling and vacuum pumping system according to claim 5, characterized in that: The return pipe 1 and the return pipe 2 are both provided with a control valve 5.

8. The shock absorber oil filling and vacuum pumping system according to claim 3, characterized in that: A primary filter is provided on one end of the vacuum main pipe and the oil filling pipe, respectively, close to the vacuum pump and the oil filling pump. A high-pressure filter is provided on one end of the return pipe, close to the oil tank, and on the oil filling pipe, between the one-way valve and the oil filling pressure regulating assembly. At least one accumulator is provided on the vacuum main pipe, between the switch valve and the shock absorber body.

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