Hydraulic suspension system and vehicle

Abstract

The utility model belongs to the technical field of suspension systems, and discloses a hydraulic suspension system and a vehicle, the suspension system comprises a shock absorber, a damping regulator and a bidirectional oil pump; the shock absorber comprises a first cylinder body and a second cylinder body, the second cylinder body is provided with an outer cylinder, an inner cylinder is arranged in the outer cylinder, one end of the first cylinder body extends into the inner cylinder, and a piston is arranged at the end of the first cylinder body. The damping regulator is provided with a first oil port and a second oil port, the first oil port is communicated with the outer cylinder, the second oil port is communicated with the inner cylinder, oil entering from the first oil port is located on one side of the piston, and oil entering from the second oil port is located on the other side of the piston; a first oil pumping port of the two-way oil pump is communicated with the first oil port, and a second oil pumping port of the two-way oil pump is communicated with the second oil port. The adjusting efficiency can be obviously improved, and the adjusting time of the height of the vehicle is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of suspension systems, and in particular relates to a hydraulic suspension system and a vehicle. Background Art

[0002] With the continuous development of vehicle technology, in order to meet the needs of vehicles in different driving conditions, designers began to seek active lifting of the suspension to achieve vehicle height adjustment. At present, the adjustment of vehicle height is generally achieved by changing the height of the air spring, and its rising speed is only 10-20mm / s, which is a slow rise. Therefore, it takes a long time to adjust the vehicle height. Utility Model Content

[0003] In order to solve the above technical problems, the utility model discloses a hydraulic suspension system and a wheel. The suspension system can significantly improve the adjustment efficiency and reduce the adjustment time of the vehicle height.

[0004] The specific technical solution of the utility model is as follows:

[0005] A hydraulic suspension system, comprising:

[0006] A shock absorber, the shock absorber comprising a first cylinder and a second cylinder, the second cylinder being provided with an outer cylinder, an inner cylinder being provided inside the outer cylinder, one end of the first cylinder extending into the inner cylinder, and a piston being provided at the end;

[0007] A damping regulator, wherein the damping regulator is provided with a first oil port and a second oil port, wherein the first oil port is communicated with the outer cylinder, and the second oil port is communicated with the inner cylinder, and the oil entering from the first oil port is located on one side of the piston, and the oil entering from the second oil port is located on the other side of the piston; and

[0008] A bidirectional oil pump, wherein the first pump oil port of the bidirectional oil pump is communicated with the first oil port, and the second pump oil port of the bidirectional oil pump is communicated with the second oil port.

[0009] The present application enables the oil to quickly enter the outer cylinder or the inner cylinder from the first oil port or the second oil port through the rapid forward and reverse rotation of the bidirectional oil pump, so that the piston moves quickly in the inner cylinder. When the second cylinder is relatively stationary, the first cylinder quickly pushes the sprung mass block and the unsprung mass block to move relative to or away from each other, thereby achieving adjustment of the vehicle height, thereby improving the adjustment efficiency.

[0010] Preferably, the first pump oil port is provided with a first switch valve, and the second pump oil port is provided with a second switch valve.

[0011] The first switch valve and the second switch valve can realize the connection or disconnection of the oil circuit of the two-way oil pump, so as to better meet the requirements of maintaining the stability of the vehicle height.

[0012] Preferably, a first pressure accumulator is provided at the first oil port, and a second pressure accumulator is provided at the second oil port.

[0013] The first accumulator and the second accumulator can store and discharge oil, and cooperate with the first switch valve and the second switch valve. When the first switch valve and the second switch valve are closed, the piston reciprocates in the inner cylinder according to the actual driving state of the wheel, so that one of the first accumulator and the second accumulator stores oil and the other discharges oil, thereby utilizing the oil in the suspension system to achieve adaptive suspension height adjustment.

[0014] Preferably, the damping regulator is provided with a third oil port and a fourth oil port; one end of the third oil port is connected to the first pump oil port, and the other end is connected to the first oil port; one end of the fourth oil port is connected to the second pump oil port, and the other end is connected to the second oil port;

[0015] A first damping valve is provided between the first oil port and the third oil port, and a second damping valve is provided between the second oil port and the fourth oil port.

[0016] The first damping valve and the second damping valve can control the valve opening, change the oil flow rate, and achieve damping adjustment.

[0017] Preferably, the first oil port and the second oil port are located on one side of the damping adjuster, and the third oil port and the fourth oil port are located on the other side of the damping adjuster.

[0018] The layout is simple and practical, and can avoid pipeline interference while ensuring that the damping adjuster has a small volume.

[0019] Preferably, the first pressure accumulator is located between the first damping valve and the first switching valve, and the second pressure accumulator is located between the second damping valve and the second switching valve.

[0020] When the first switch valve and the second switch valve are closed, the oil first passes through the damping valve and then enters the accumulator. On the contrary, when the oil flows out of the accumulator, it first passes through the damping valve and then flows to the shock absorber, thereby maintaining the damping consistency during the vehicle driving process through the damping valve.

[0021] Preferably, the damping adjuster is provided with an oil filling port for connecting to an external hydraulic oil pump, and the oil filling port is connected to the first oil port and the second oil port.

[0022] The oil filling port can be used to fill the system with hydraulic oil in an initial state.

[0023] Preferably, a fifth oil port and a sixth oil port are provided on a side wall of one end of the outer cylinder away from the first cylinder body;

[0024] The fifth oil port extends into the inner side of the outer cylinder and is connected to the end of the inner cylinder, which is away from the first cylinder, so that the oil entering from the first oil port flows to the side of the piston close to the fifth oil port;

[0025] An oil passage is formed between the inner cylinder and the outer cylinder, and a seventh oil port is provided on the side wall of one end of the inner cylinder close to the first cylinder body. The oil passage is connected to the sixth oil port and the seventh oil port so that the oil entering from the second oil port flows to the side of the piston away from the fifth oil port.

[0026] The structure can well realize active driving of the piston, thereby realizing active adjustment of the vehicle height, and the structure is stable and easy to realize.

[0027] Preferably, it also includes:

[0028] A barrel joint, wherein the fifth oil port is arranged on the barrel joint, at an end of the second barrel away from the first barrel, the barrel joint seals the outer barrel and communicates with the inner barrel;

[0029] An end cover is arranged at one end of the second cylinder body close to the first cylinder body, and the piston rod of the first cylinder body extends into the inner cylinder from the end cover.

[0030] The provision of the cylinder joint can reduce the design cost and manufacturing cost of the second cylinder, and can more easily realize the assembly between the second cylinder and the first cylinder, thereby meeting the requirements for vehicle height adjustment.

[0031] A vehicle comprises a hydraulic suspension system as described above.

[0032] Compared with the prior art, the utility model can not only adjust the height of the vehicle, but also increase the lifting speed. It not only meets the use requirements of conventional road conditions, but also can get out of mud pits and deserts, improve off-road passing performance, and increase the driving pleasure of off-road enthusiasts. At the same time, the utility model also realizes the passive flow of hydraulic oil and retains the damping and vibration reduction function. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of an embodiment of the utility model;

[0034] Figure 2 It is a front view of the damping regulator in the embodiment of the utility model;

[0035] Figure 3 It is a rear view of the damping adjuster in the embodiment of the utility model;

[0036] Figure 4 A top view of the damping regulator in the embodiment of the utility model;

[0037] Figure 5 for Figure 3AA section view;

[0038] Figure 6 for Figure 3 BB cross-sectional view;

[0039] Figure 7 for Figure 4 CC section view;

[0040] Figure 8 for Figure 4 DD cross-sectional view;

[0041] Fig. 9 It is a front view of the shock absorber in the embodiment of the utility model;

[0042] Fig.10 A top view of the shock absorber in the embodiment of the utility model;

[0043] Fig.11 for Fig.10 EE cross-sectional view.

[0044] In the figure: 100-shock absorber; 101-first cylinder; 102-second cylinder; 200-damping adjuster; 300-two-way oil pump; 1-outer cylinder; 2-inner cylinder; 3-piston; 4-first oil port; 5-second oil port; 6-first switch valve; 7-second switch valve; 8-first accumulator; 9-second accumulator; 10-first damping valve; 11-second damping valve; 12-third oil port; 13-fourth oil port; 14-oil filling port; 15-fifth oil port; 16-sixth oil port; 17-oil passage; 18-seventh oil port; 19-body; 20-piston rod; 21-cylinder joint; 22-end cover; 23-hanging ear. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0046] This embodiment is used for a vehicle, including a hydraulic suspension system. Each wheel of the vehicle is provided with a hydraulic suspension system, so that when the suspension system is in effect, each wheel has independent adjustment capability.

[0047] like Figures 1 to 11As shown, a hydraulic suspension system includes a shock absorber 100, a damping adjuster 200 and a two-way oil pump 300; the shock absorber 100 includes a first cylinder 101 and a second cylinder 102, the second cylinder 102 is provided with an outer cylinder 1, an inner cylinder 2 is provided in the outer cylinder 1, one end of the first cylinder 101 extends into the inner cylinder 2, and a piston 3 is provided at the end; the damping adjuster 200 is provided with a first oil port 4 and a second oil port 5, the first oil port 4 is connected to the outer cylinder 1, the second oil port 5 is connected to the inner cylinder 2, the oil entering from the first oil port 4 is located on one side of the piston 3, and the oil entering from the second oil port 5 is located on the other side of the piston 3; the first pump oil port of the two-way oil pump 300 is connected to the first oil port 4, and the second pump oil port of the two-way oil pump 300 is connected to the second oil port 5.

[0048] In this embodiment, one of the first cylinder 101 and the second cylinder 102 is connected to the sprung mass of the vehicle, and the other is connected to the unsprung mass of the vehicle. In this embodiment, the first cylinder 101 is connected to the sprung mass of the vehicle, and the second cylinder 102 is provided with a hanging ear 23, which is connected to the unsprung mass of the vehicle through the hanging ear 23. The first cylinder 101 and the second cylinder 102 have relative sliding ability, such as Figure 4 , Figure 5 , Fig.11 As shown, when the oil entering the second cylinder 102 is located on the unsprung mass side, the piston 3 moves toward the sprung mass side to achieve vehicle elevation, and when the oil entering the second cylinder 102 is located on the sprung mass side, the piston 3 moves toward the unsprung mass side to reduce the height of the vehicle. In other words, when the two-way oil pump 300 pumps oil through the first pump port, the height of the vehicle increases, and when the two-way oil pump 300 pumps oil through the second pump port, the height of the vehicle decreases. It should be noted that the direction marked by the bold line in the figure is only one of the flow directions of the oil. It can be understood without a doubt that the flow direction of the oil is bidirectional flow. The same applies to the following embodiments and will not be repeated.

[0049] In this embodiment, the first pump oil port is provided with a first switch valve 6, and the second pump oil port is provided with a second switch valve 7. When the first switch valve 6 and the second switch valve 7 are opened, the vehicle height can be quickly raised or lowered, and when the first switch valve 6 and the second switch valve 7 are closed, the amount of oil in the shock absorber 100 and the damping adjuster 200 is constant, and the vehicle height can be well maintained. Further, the first oil port 4 is also provided with a first accumulator 8, and the second oil port 5 is also provided with a second accumulator 9. Since the first accumulator 8 and the second accumulator 9 can store and discharge oil, when the first switch valve 6 and the second switch valve 7 are closed, the first accumulator 8 and the second accumulator 9 can store and discharge oil passively. Specifically, when the first switch valve 6 and the second switch valve 7 are closed, there is a certain amount of oil in the first accumulator 8 and the second accumulator 9. When the sprung mass and the unsprung mass move in opposite directions, the oil enters the unsprung mass side of the inner tube 2, the piston 3 moves toward the sprung mass side, and the oil flows into the second accumulator 8 and the second accumulator 9. The second accumulator 9 stores, and at this time, the inner cylinder 2 on the unsprung mass side has a lower pressure, and the first accumulator 8 discharges oil outwards, and flows into the inner cylinder 2 cavity on the unsprung mass side for replenishment; similarly, when the sprung mass and the unsprung mass move toward each other, the oil enters the sprung mass side of the inner cylinder 2, and the piston 3 moves toward the unsprung mass side, and the oil flows into the first accumulator 8 for storage. At this time, the inner cylinder 2 on the sprung mass side has a lower pressure, and the second accumulator 9 discharges oil outwards, and flows into the inner cylinder 2 cavity on the sprung mass side for replenishment. Through the above process, the vehicle's damping adjustment is achieved, and the vehicle's vibration reduction is achieved.

[0050] It is known that in the above embodiment, the damping is not adjustable while the vehicle height is maintained, and its vibration reduction effect is relatively certain. Therefore, in some vehicle driving conditions, it is still not possible to provide passengers with a comfortable riding state. Therefore, in this embodiment, a first damping valve 10 and a second damping valve 11 are provided. In addition, in this embodiment, the first accumulator 8 is located between the first damping valve 10 and the first switch valve 6, and the second accumulator 9 is located between the second damping valve 11 and the second switch valve 7. Such a setting can improve the response speed of damping vibration reduction, and maintain the consistency of damping when the first switch valve 6 and the second switch valve 7 are closed. Therefore, further, the damping adjuster 200 is provided with a third oil port 12 and a fourth oil port 13; one end of the third oil port 12 is connected to the first pump oil port, and the other end is connected to the first oil port 4; one end of the fourth oil port 13 is connected to the second pump oil port, and the other end is connected to the second oil port 5; a first damping valve 10 is provided between the first oil port 4 and the third oil port 12, and a second damping valve 11 is provided between the second oil port 5 and the fourth oil port 13.

[0051] Therefore, if Figure 7 , Figure 8 , Fig.11As shown, when the sprung mass and the unsprung mass move in opposite directions, the oil enters the unsprung mass side of the inner tube 2, and the piston 3 moves toward the sprung mass side. At this time, the oil on the sprung mass side passes through the second damping valve 11, generating shock absorber damping, and the oil flows into the second accumulator 9 for storage. At this time, the inner tube pressure of the inner tube 2 on the unsprung mass side is relatively low, and the first accumulator 8 discharges the oil outward and flows into the cavity of the inner tube 2 on the unsprung mass side for fluid replenishment; similarly, when the sprung mass and the unsprung mass move in opposite directions, the oil enters the sprung to both sides of the inner tube 2, and the piston 3 moves toward the unsprung mass side. At this time, the oil on the unsprung mass side passes through the first damping valve 10, generating shock absorber damping, and the oil flows into the first accumulator 8 for storage. At this time, the inner tube pressure of the inner tube 2 on the sprung mass side is relatively low, and the second accumulator 9 discharges the oil outward and flows into the cavity of the inner tube 2 on the sprung mass side for fluid replenishment. It can be known that in the above process, since the first damping valve 10 and the second damping valve 11 can be adjusted in real time according to the signals they receive, the flow rate of oil passing through is changed after the opening of the control valve port, thereby meeting the damping adjustment requirements, thereby meeting the vehicle's vibration reduction needs in different driving conditions.

[0052] In this embodiment, the first oil port 4 and the second oil port 5 are located on one side of the damping adjuster 200, and the third oil port 12 and the fourth oil port 13 are located on the other side of the damping adjuster 200. The damping adjuster 200 is provided with an oil injection port 14 for externally connecting a hydraulic oil pump, and the oil injection port 14 is connected to the first oil port 4 and the second oil port 5. The oil injection port 14 is located on the same side of the third oil port 12 and the fourth oil port 13, and it is known that a one-way valve is provided between the first oil port 4 and the oil injection port 14, and between the second oil port 5 and the oil injection port 14 to prevent the oil injected into the system from flowing back.

[0053] like Figures 9 to 11 In this embodiment, a fifth oil port 15 and a sixth oil port 16 are provided on the side wall of the outer cylinder 1 at one end away from the first cylinder body 101; the fifth oil port 15 extends into the inner side of the outer cylinder 1 and is connected to the end of the inner cylinder 2, which is away from the first cylinder body 101, so that the oil entering from the first oil port 4 flows to the side of the piston 3 close to the fifth oil port 15; an oil passage 17 is formed between the inner cylinder 2 and the outer cylinder 1, and a seventh oil port 18 is provided on the side wall of the inner cylinder 2 at one end close to the first cylinder body 101, and the oil passage 17 is connected to the sixth oil port 16 and the seventh oil port 18, so that the oil entering from the second oil port 5 flows to the side of the piston 3 away from the fifth oil port 15.

[0054] The first cylinder 101 includes a body 19, a piston rod 20 and a piston 3; the body 19 is a cylindrical structure, one end of the piston rod 20 is connected to the body 19, and the other end is connected to the piston 3. The end carries the piston 3 and extends into the inner cylinder 2. The piston 3 is slidably connected to the inner cylinder 2. It can be seen that there is a strong sealing between the outer wall of the piston 3 and the inner wall of the inner cylinder 2, which can avoid the cross flow of oil on both sides of the piston 3. Therefore, through the connected first oil port 4 and the fifth oil port 15, the oil can be moved to the unsprung mass side of the piston 3, and through the second oil port 5, the sixth oil port 16, the oil passage 17 and the seventh oil port 18, the oil can be moved to the sprung mass side of the piston 3. The first oil port 4 and the second oil port 5 form a passive adjustment oil circuit and an active adjustment oil circuit through the first accumulator 8 and the second accumulator 9, or the two-way oil pump 300, thereby meeting the actual use requirements of the vehicle.

[0055] In this embodiment, a cylinder joint 21 is also included, and the fifth oil port 15 is arranged on the cylinder joint 21. At one end of the second cylinder 102 away from the first cylinder 101, the cylinder joint 21 seals the outer cylinder 1 and communicates with the inner cylinder 2; an end cover 22 is arranged at one end of the second cylinder 102 close to the first cylinder 101, and the piston rod 20 of the first cylinder 101 extends into the inner cylinder 2 from the end cover 22. Thus, the second cylinder 102 includes the inner cylinder 2, the outer cylinder 1, the cylinder joint 21 and the end cover 22. One end of the inner cylinder 2 and one end of the outer cylinder 1 are connected through the end cover 22, and the end cover 22 realizes the sealing of the end of the outer cylinder 1 and reserves a channel for the sliding of the piston rod 20; the other end of the inner cylinder 2 and the other end of the outer cylinder 1 are connected through the cylinder joint 21, and the cylinder joint 21 realizes the sealing of the end of the outer cylinder 1 and communicates with the end of the inner cylinder 2 through the fifth oil port 15. In addition, the hanging ear 23 is arranged on the cylinder joint 21. Therefore, such an assembly combination form is simple, easy to assemble and disassemble, and easy to implement for the overall structure.

[0056] Therefore, in this embodiment, if the height of the vehicle needs to be adjusted, the first switch valve 6 and the second switch valve 7 are opened to allow the oil to flow back and forth in the two-way oil pump 300 to quickly adjust the height of the vehicle; when the vehicle is maintained at a certain height, the first switch valve 6 and the second switch valve 7 are closed to allow the oil to flow back and forth in the first accumulator 8 and the second accumulator 9, thereby achieving damping and vibration reduction under the condition of determining the height of the vehicle body. At this time, the two-way oil pump 300 does not need to be started, which can save energy consumption.

[0057] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic suspension system, characterized in that: include: A shock absorber, the shock absorber comprising a first cylinder and a second cylinder, the second cylinder being provided with an outer cylinder, an inner cylinder being provided inside the outer cylinder, one end of the first cylinder extending into the inner cylinder, and a piston being provided at the end; A damping regulator, wherein the damping regulator is provided with a first oil port and a second oil port, wherein the first oil port is communicated with the outer cylinder, and the second oil port is communicated with the inner cylinder, and the oil entering from the first oil port is located on one side of the piston, and the oil entering from the second oil port is located on the other side of the piston; and A bidirectional oil pump, wherein the first pump oil port of the bidirectional oil pump is communicated with the first oil port, and the second pump oil port of the bidirectional oil pump is communicated with the second oil port.

2. A hydraulic suspension system as claimed in claim 1, characterized in that: The first pump oil port is provided with a first switch valve, and the second pump oil port is provided with a second switch valve.

3. A hydraulic suspension system as claimed in claim 2, characterized in that: A first pressure accumulator is also provided at the first oil port, and a second pressure accumulator is also provided at the second oil port.

4. A hydraulic suspension system as claimed in claim 3, characterized in that: The damping regulator is provided with a third oil port and a fourth oil port; one end of the third oil port is connected to the first pump oil port, and the other end is connected to the first oil port; one end of the fourth oil port is connected to the second pump oil port, and the other end is connected to the second oil port; A first damping valve is provided between the first oil port and the third oil port, and a second damping valve is provided between the second oil port and the fourth oil port.

5. A hydraulic suspension system as claimed in claim 4, characterized in that: The first oil port and the second oil port are located on one side of the damping adjuster, and the third oil port and the fourth oil port are located on the other side of the damping adjuster.

6. A hydraulic suspension system as claimed in claim 5, characterized in that: The first pressure accumulator is located between the first damping valve and the first switching valve, and the second pressure accumulator is located between the second damping valve and the second switching valve.

7. A hydraulic suspension system as claimed in claim 1, characterized in that: The damping adjuster is provided with an oil filling port for externally connecting a hydraulic oil pump, and the oil filling port is connected with the first oil port and the second oil port.

8. A hydraulic suspension system as claimed in claim 1, characterized in that: The side wall of the outer cylinder at one end away from the first cylinder body is provided with a fifth oil port and a sixth oil port; The fifth oil port extends into the inner side of the outer cylinder and is connected to the end of the inner cylinder, which is away from the first cylinder, so that the oil entering from the first oil port flows to the side of the piston close to the fifth oil port; An oil passage is formed between the inner cylinder and the outer cylinder, and a seventh oil port is provided on the side wall of one end of the inner cylinder close to the first cylinder body. The oil passage is connected to the sixth oil port and the seventh oil port so that the oil entering from the second oil port flows to the side of the piston away from the fifth oil port.

9. A hydraulic suspension system as claimed in claim 8, characterized in that: Also includes: A barrel joint, wherein the fifth oil port is arranged on the barrel joint, at an end of the second barrel away from the first barrel, the barrel joint seals the outer barrel and communicates with the inner barrel; An end cover is arranged at one end of the second cylinder body close to the first cylinder body, and the piston rod of the first cylinder body extends into the inner cylinder from the end cover.

10. A vehicle, characterized in that: It comprises a hydraulic suspension system as claimed in any one of claims 1 to 9.

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