Hydraulic suspension system and vehicle having the same

Abstract

The present invention discloses a hydraulic suspension system and a vehicle having the same. The hydraulic suspension system includes: a plurality of height adjustment devices; a central control device, the central control device includes a shell and a moving part, the shell is divided into a first area and a second area in the moving direction of the moving part, the first area includes a first chamber and a second chamber that are isolated from each other, and the second area includes a third chamber and a fourth chamber that are isolated from each other; the wheels corresponding to the height adjustment devices connected to the first chamber and the second chamber are located on the diagonal line, and the wheels corresponding to the height adjustment devices connected to the third chamber and the fourth chamber are also located on the diagonal line. According to the hydraulic suspension system of the present invention, when a single wheel of the vehicle encounters an obstacle, the handling stability of the vehicle is increased.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to a hydraulic suspension system and a vehicle having the same. Background Art

[0002] The suspension system plays an important role in the safety and stability of the vehicle. However, the requirements for vehicle comfort and handling stability are conflicting. Most current suspension system designs tend to provide better comfort at the expense of certain handling stability. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a hydraulic suspension system, which is conducive to increasing the handling stability of a vehicle.

[0004] The present invention also provides a vehicle having the hydraulic suspension system.

[0005] According to an embodiment of the present invention, the hydraulic suspension system includes: a plurality of height adjustment devices, which are arranged one-to-one corresponding to a plurality of wheels of a vehicle; a central control device, wherein the central control device includes a shell and a moving part, the moving part is movably arranged in the shell and divides the shell into a first area and a second area in the moving direction of the moving part, the first area includes a first chamber and a second chamber isolated from each other, and the second area includes a third chamber and a fourth chamber isolated from each other; the first chamber, the second chamber, the third chamber and the fourth chamber are connected to the plurality of height adjustment devices one-to-one, and the wheels corresponding to the height adjustment devices connected to the first chamber and the second chamber are located on the diagonal line, and the wheels corresponding to the height adjustment devices connected to the third chamber and the fourth chamber are also located on the diagonal line.

[0006] According to the hydraulic suspension system of an embodiment of the present invention, when a single wheel of a vehicle encounters an obstacle, the height of the single wheel rises, thereby causing the medium in the height adjustment device corresponding to the single wheel to enter the central control device, causing the moving part to change, so that the medium enters the height adjustment device corresponding to the wheel on the other diagonal line, thereby lowering the wheel on the other diagonal line, thereby extending the time that the wheel on the other diagonal line leaves the ground, making it more difficult to leave the ground, and increasing the handling stability of the vehicle.

[0007] In some embodiments of the present invention, volume changes of the first chamber and the second chamber in the first region are opposite to volume changes of the third chamber and the fourth chamber in the second region.

[0008] In some embodiments of the present invention, the first chamber, the second chamber, the third chamber, and the fourth chamber are sequentially arranged along the moving direction of the moving member.

[0009] In some embodiments of the present invention, in an initial state, the first chamber has the same volume as the fourth chamber, and the second chamber has the same volume as the third chamber.

[0010] In some embodiments of the present invention, one of the front axle height adjustment device and the rear axle height adjustment device is connected to the first chamber and the third chamber, and the other of the front axle height adjustment device and the rear axle height adjustment device is connected to the second chamber and the fourth chamber.

[0011] In some embodiments of the present invention, one of the front axle height adjustment device and the rear axle height adjustment device is connected to the first chamber and the fourth chamber, and the other of the front axle height adjustment device and the rear axle height adjustment device is connected to the second chamber and the third chamber.

[0012] In some embodiments of the present invention, a first connecting port is provided on the central control device, the height adjustment device includes a liquid storage device and a shock absorber, the shock absorber is provided corresponding to the wheel, the liquid storage device is used to transport oil to the shock absorber, and the first connecting port is connected to the shock absorber; the first connecting port is provided with multiple and includes a first port, a second port, a third port and a fourth port, and the first port, the second port, the third port and the fourth port are respectively connected to the first chamber, the second chamber, the third chamber and the fourth chamber.

[0013] In some embodiments of the present invention, the central control device also includes a second connection port, which is suitable for connecting to the liquid storage device; the second connection port is provided with multiple and includes a fifth port, a sixth port, a seventh port and an eighth port, and the fifth port, the sixth port, the seventh port and the eighth port are respectively connected to the first chamber, the second chamber, the third chamber and the fourth chamber.

[0014] In some embodiments of the present invention, an axis of the first connecting port is perpendicular to an axis of the second connecting port.

[0015] In some embodiments of the present invention, the hydraulic suspension system also includes a first control valve, a second control valve, a third control valve and a fourth control valve, the first control valve is arranged between the fifth port and the liquid storage device, the second control valve is arranged between the sixth port and the liquid storage device, the third control valve is arranged between the seventh port and the liquid storage device, and the fourth control valve is arranged between the eighth port and the liquid storage device.

[0016] In some embodiments of the present invention, a first connecting channel is provided between the first control valve and the fourth control valve, a fifth control valve is provided on the first connecting channel, a second connecting channel is provided between the second control valve and the third control valve, a sixth control valve is provided on the second connecting channel.

[0017] In some embodiments of the present invention, the moving part includes a first part, a second part and a third part, the first part moves axially along the side wall of the shell to separate the shell into the first area and the second area, the second part is connected to one side of the first part and moves along the side wall of the shell to separate the first area into the first chamber and the second chamber, and the third part is connected to the other side of the first part and moves along the side wall of the shell to separate the second area into the third chamber and the fourth chamber.

[0018] In some embodiments of the present invention, the shell has a first cylinder, a second cylinder and a third cylinder arranged in sequence along the moving direction of the moving part, the inner diameter of the second cylinder is larger than the inner diameter of the first cylinder and larger than the inner diameter of the third cylinder, the first chamber is formed between the second part and the inner wall of the first cylinder, the first part contacts the inner wall of the second cylinder to separate the second cylinder into the second chamber and the third chamber, and the fourth chamber is formed between the third part and the inner wall of the third cylinder.

[0019] In some embodiments of the present invention, an extension direction of the first portion is perpendicular to an extension direction of the second portion, and an extension direction of the second portion and the third portion are symmetrically arranged with respect to the first portion.

[0020] In some embodiments of the present invention, a return spring is provided between the moving member and the end wall of the housing.

[0021] In some embodiments of the present invention, the shock absorber has a shock absorber housing, a piston and a piston rod, the shock absorber housing is suitable for being connected to a wheel, the piston is located in the shock absorber housing and cooperates with the shock absorber housing to define an upper chamber and a lower chamber, one end of the piston rod is connected to the piston, and the piston rod is suitable for being connected to a vehicle body, an oil channel is provided in the piston rod, the oil channel is connected to the lower chamber, and the liquid storage device is used to transport oil to the shock absorber through the oil channel.

[0022] In some embodiments of the present invention, the height adjustment device further comprises a connecting channel and an accumulator module, wherein the connecting channel is used to connect the central control device with the corresponding shock absorber;

[0023] The accumulator module includes a damping adjustment accumulator and an opening adjustment valve. The damping adjustment accumulator is connected between the shock absorber and the central control device, and the opening adjustment valve is arranged between the damping adjustment accumulator and the shock absorber.

[0024] In some embodiments of the present invention, the accumulator module also includes a stiffness adjustment accumulator and a stiffness adjustment valve, a stiffness adjustment connection point is provided on the connecting channel, the stiffness adjustment accumulator is connected to the stiffness adjustment connection point, and the stiffness adjustment valve is provided between the stiffness adjustment accumulator and the stiffness adjustment connection point.

[0025] In some embodiments of the present invention, the height adjustment device further includes a seventh control valve, and the seventh control valve is arranged between the stiffness adjustment connection point and the damping adjustment accumulator.

[0026] In some embodiments of the present invention, the central control device is a cylinder structure.

[0027] The vehicle according to the embodiment of the present invention comprises the hydraulic suspension system according to the above embodiment of the present invention.

[0028] The vehicle according to the embodiment of the present invention can play a role in suppressing the roll when the vehicle has a roll tendency. When the heights of the four tires of the vehicle are inconsistent, the vehicle body height can be adjusted to reduce the tilt amplitude of the vehicle and prevent the vehicle from rolling.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] Figure 1 and Figure 2 Schematic diagram of a hydraulic suspension system according to different embodiments of the present invention;

[0032] Figure 3 is a schematic diagram of a left front shock absorber assembly and a right front shock absorber assembly according to an embodiment of the present invention;

[0033] Figure 4 for Figure 3 A cross-sectional view of the shock absorber assembly shown;

[0034] Figure 5 is a cross-sectional view of a central control device according to an embodiment of the present invention;

[0035] Figure 6is a three-dimensional diagram of a central control device according to an embodiment of the present invention;

[0036] Figure 7 Schematic diagram of a metal bellows accumulator according to an embodiment of the present invention.

[0037] Reference numerals:

[0038] Hydraulic suspension system 1000,

[0039] Liquid storage pot 1,

[0040] Shock absorber assembly 2, shock absorber 200, shock absorber housing 201, upper chamber 2011, lower chamber 2012, piston 202, piston rod 203, oil channel 204, shock absorbing spring 205,

[0041] The first control valve 3, the second control valve 4, the third control valve 5, the fourth control valve 6,

[0042] The fifth control valve 7, the sixth control valve 8,

[0043] Opening regulating valve 80,

[0044] Damping adjustment accumulator 9,

[0045] Stiffness regulating accumulator 10, metal bellows 101,

[0046] Stiffness regulating valve 11,

[0047] Seventh control valve 12,

[0048] Central accumulator 13, central accumulator regulating valve 32,

[0049] Central control device 24, shell 240, moving member 241, first part 2410, second part 2411, third part 2412, first chamber 243, second chamber 244, third chamber 245, fourth chamber 246, first return spring 247, second return spring 248, guide assembly 249, first guide member 2490, second guide member 2491, first connecting port 2401, first port 24011, second port 24012, third port 24013, fourth port 24014, second connecting port 2402, fifth port 24021, sixth port 24022, seventh port 24023, eighth port 24024, first cylinder 2403, second cylinder 2404, third cylinder 2405,

[0050] Control pump 26 , control valve body 260 , drive motor 261 , oil return valve 27 , check valve 28 , pressure-stabilizing accumulator 29 , pressure-reducing accumulator 30 , pressure relief valve 31 . DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Reference below Figure 1-Figure 7 A hydraulic suspension system 1000 according to an embodiment of the present invention is described, wherein the hydraulic suspension system 1000 is used in a vehicle, and the hydraulic suspension system 1000 is used to connect an axle and a body of the vehicle.

[0055] like Figure 1-Figure 2 , Figure 5As shown, the hydraulic suspension system 1000 according to the embodiment of the present invention comprises: a plurality of height adjustment devices and a central control device 24, wherein the plurality of height adjustment devices are arranged one by one corresponding to the plurality of wheels of the vehicle, and each height adjustment device is connected to the vehicle body, specifically, the plurality of height adjustment devices comprise a front axle height adjustment device and a rear axle height adjustment device, the front axle height adjustment device is arranged corresponding to the left front wheel and the right front wheel respectively, and the rear axle height adjustment device is arranged corresponding to the left rear wheel and the right rear wheel respectively. In the description of the present invention, for the convenience of description, the height adjustment device corresponding to the left front wheel is referred to as the left front height adjustment device, the height adjustment device corresponding to the right front wheel is referred to as the right front height adjustment device, the height adjustment device corresponding to the left rear wheel is referred to as the left rear height adjustment device, and the height adjustment device corresponding to the right rear wheel is referred to as the right rear height adjustment device. The height adjustment device of the present invention is used to adjust the height of the vehicle, that is, to adjust the relative distance between the wheel and the vehicle body.

[0056] The central control device 24 includes a housing 240 and a moving member 241, wherein the moving member 241 is movably disposed in the housing 240 and the housing 240 is divided into a first area and a second area in the moving direction of the moving member 241, wherein the first area includes a first chamber 243 and a second chamber 244 that are isolated from each other, and the second area includes a third chamber 245 and a fourth chamber 246 that are isolated from each other. The first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 are suitable for filling with a medium. The present invention uses oil as a medium. In other embodiments, other media may also be used, which are consistent with the media in the height adjustment device.

[0057] Specifically, oil is provided in the first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246. When the amount of oil in the first region increases, a force to move toward the second region can be applied to the moving member 241. When the amount of oil in the second region increases, a force to move toward the first region can be applied to the moving member 241. In some specific examples of the present invention, the first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 are arranged in sequence along the moving direction of the moving member 241. Of course, it can be understood that the arrangement order of the first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 is not limited to this, as long as the first chamber 243 and the second chamber 244 are distributed in the first region, and the third chamber 245 and the fourth chamber 246 are distributed in the second region.

[0058] The first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 are connected to a plurality of height adjustment devices in a one-to-one correspondence. The wheels corresponding to the height adjustment devices connected to the first chamber 243 and the second chamber 244 are located on the diagonal line, and the wheels corresponding to the height adjustment devices connected to the third chamber 245 and the fourth chamber 246 are also located on the diagonal line.

[0059] Specifically, when the wheels corresponding to the height adjustment devices communicated with the first chamber 243 and the second chamber 244 are the left front wheel and the right rear wheel, the wheels corresponding to the height adjustment devices communicated with the third chamber 245 and the fourth chamber 246 may be the right front wheel and the left rear wheel. In this case, the first chamber 243 is communicated with one of the left front height adjustment device and the right rear height adjustment device, and the second chamber 244 is communicated with the other of the left front height adjustment device and the right rear height adjustment device. The third chamber 245 is communicated with one of the right front height adjustment device and the left rear height adjustment device, and the fourth chamber 246 is communicated with the other of the right front height adjustment device and the left rear height adjustment device.

[0060] When the wheels corresponding to the height adjustment devices communicated with the first chamber 243 and the second chamber 244 are the right front wheel and the left rear wheel, the wheels corresponding to the height adjustment devices communicated with the third chamber 245 and the fourth chamber 246 are the left front wheel and the right rear wheel. In this case, the first chamber 243 communicates with one of the right front height adjustment device and the left rear height adjustment device, and the second chamber 244 communicates with the other of the right front height adjustment device and the left rear height adjustment device. The third chamber 245 communicates with one of the left front height adjustment device and the right rear height adjustment device, and the fourth chamber 246 communicates with the other of the left front height adjustment device and the right rear height adjustment device.

[0061] It should also be noted that when one of the chambers of the central control device 24 is connected to the corresponding height adjustment device, the oil can flow between the chamber and the height adjustment device. When the distance between the wheel and the corresponding vehicle body changes, the oil in the height adjustment device can be discharged or discharged. In the embodiment of the present invention, the central control device 24 is a cylinder structure.

[0062] When a single wheel of a vehicle encounters an obstacle, the height of the single wheel rises, causing the oil in the height adjustment device corresponding to the single wheel to enter the central control device, causing the moving part to change, so that the medium enters the height adjustment device corresponding to the wheel on the other diagonal line, thereby lowering the wheel on the other diagonal line, prolonging the time that the wheel on the other diagonal line leaves the ground, making it more difficult to leave the ground, and increasing the handling stability of the vehicle.

[0063] For example, when the left front wheel encounters an obstacle, the left front wheel is raised, and during the continuous driving process, the center of gravity of the vehicle is raised, and the right front wheel and the left rear wheel are at risk of leaving the ground, thereby causing the vehicle to be at risk of losing control. However, the present invention sets a central control device, and when the left front wheel encounters an obstacle, the oil of the left front height adjustment device flows into the first area, and the oil flowing into the first area acts on the moving member 241, causing the moving member 241 to move into the second area, so that the oil in the second area is squeezed into the right front height adjustment device and the left rear height adjustment device, thereby increasing the distance between the right front wheel and the left rear wheel and the vehicle body, reducing the height of the right front wheel and the left rear wheel, thereby reducing the risk of the right front wheel and the left rear wheel leaving the ground, and increasing the handling stability of the vehicle.

[0064] On the other hand, when the vehicle has a tendency to roll, for example, the left front wheel and the left rear wheel are lifted, the left front height adjustment device and the left rear height adjustment device flow into the first area and the second area respectively, and the force exerted by the first area on the moving member 241 and the force exerted by the second area on the moving member 241 are opposite, and the two forces in opposite directions cancel each other out so that the moving member 241 does not move, that is, the oil path between the central control device 24 and the right front height adjustment device and the right rear height adjustment device does not flow, so that the right front height adjustment device and the right rear height adjustment device maintain the current height state, which can suppress the change in the distance between the right front wheel and the vehicle body, and suppress the change in the distance between the right rear wheel and the vehicle body, thereby playing a role in suppressing roll.

[0065] When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is lifted so that the oil in the left front height adjustment device is discharged to one of the first area and the second area, so that the movable member 241 can move, and then the oil in the other of the first area and the second area is discharged to the right front height adjustment device and the left rear height adjustment device, so that the distance between the right front wheel and the left rear wheel and the vehicle body is increased, so that the vehicle body height can be adjusted to reduce the tilt of the vehicle and prevent the vehicle from rolling.

[0066] Of course, it can be understood that the above-mentioned situations are merely exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel being lifted, the left rear wheel being lifted, etc., the oil flows according to the above-mentioned linkage principle to avoid the vehicle from rolling. Each working condition will not be described in detail here.

[0067] According to the hydraulic suspension system 1000 of the embodiment of the present invention, by providing the central control device 24 and multiple sets of height adjustment devices, when the vehicle has a tendency to roll, the roll can be suppressed. When the heights of the four wheels of the vehicle are inconsistent, the vehicle body height can be adjusted to reduce the tilt of the vehicle and prevent the vehicle from rolling.

[0068] In some embodiments of the present invention, the volume changes of the first chamber 243 and the second chamber 244 in the first region are opposite to the volume changes of the third chamber 245 and the fourth chamber 246 in the second region. That is, when the volumes of the first chamber 243 and the second chamber 244 increase, the volumes of the third chamber 245 and the fourth chamber 246 decrease. Or when the volumes of the first chamber 243 and the second chamber 244 decrease, the volumes of the third chamber 245 and the fourth chamber 246 increase. Thus, the reliable movement of the moving member 241 can be ensured, and the central control device 24 can play a role in suppressing the roll.

[0069] In some specific examples of the present invention, in the initial state, the first chamber 243 and the fourth chamber 246 have the same volume, and the second chamber 244 and the third chamber 245 have the same volume. Therefore, in the initial state, the moving member 241 is in the center position, ensuring that the response to each height adjustment device is the same.

[0070] In some embodiments of the present invention, one of the front axle height adjustment device and the rear axle height adjustment device is in communication with the first chamber 243 and the third chamber 245, and the other of the front axle height adjustment device and the rear axle height adjustment device is in communication with the second chamber 244 and the fourth chamber 246. Specifically, the left front height adjustment device is in communication with the first chamber 243, the right front height adjustment device is in communication with the third chamber 245, the left rear height adjustment device is in communication with the fourth chamber 246, and the right rear height adjustment device is in communication with the second chamber 244.

[0071] When the vehicle has a pitch tendency, for example, emergency braking causes the vehicle to nod, that is, the distance between the front vehicle body and the wheel corresponding to the front axle height adjustment device becomes smaller, the oil of the left front height adjustment device and the right front height adjustment device are discharged to the first chamber 243 and the third chamber 245 respectively, and the force of the first area on the moving part 241 and the force of the second area on the moving part 241 are opposite, and the two opposite forces cancel each other out so that the moving part 241 does not move, that is, the oil path between the central control device 24 and the right rear height adjustment device and the left rear height adjustment device does not flow, so that the left rear height adjustment device and the right rear height adjustment device maintain the current height state, which can inhibit the distance between the left rear wheel and the vehicle body from changing, and inhibit the distance between the right rear wheel and the vehicle body from changing, thereby playing a role in inhibiting nodding, that is, the vehicle has an anti-pitch function.

[0072] Of course, it is understandable that the above description of the flow of oil is only an exemplary description to introduce the anti-pitch principle. When the vehicle is started in an emergency so that the vehicle has a head-up phenomenon or has a pitch tendency under other working conditions, the hydraulic suspension system 1000 can provide an anti-pitch force by utilizing the above anti-pitch principle.

[0073] In some embodiments of the present invention, one of the front axle height adjustment device and the rear axle height adjustment device is in communication with the first chamber 243 and the fourth chamber 246, and the other of the front axle height adjustment device and the rear axle height adjustment device is in communication with the second chamber 244 and the third chamber 245. Specifically, the left front height adjustment device is in communication with the first chamber 243, the right front height adjustment device is in communication with the fourth chamber 246, the left rear height adjustment device is in communication with the third chamber 245, and the right rear height adjustment device is in communication with the second chamber 244.

[0074] When the vehicle has a tendency to roll, for example, the distance between the left front wheel and the body becomes smaller, and the distance between the left rear wheel and the body becomes smaller, the oil flowing out of the left front height adjustment device is discharged to the first chamber 243, and the oil discharged from the left rear height adjustment device flows to the third chamber 245, that is, the force of the first area on the moving part 241 and the force of the second area on the moving part 241 are opposite, and the two forces in opposite directions cancel each other out so that the moving part 241 does not move, that is, the oil path between the central control device 24 and the right front height adjustment device and the right rear height adjustment device does not flow, so that the right front height adjustment device and the right rear height adjustment device maintain the current height state, which can suppress the change in the distance between the right front wheel and the body, and suppress the change in the distance between the right rear wheel and the body, thereby playing a role in suppressing roll.

[0075] Of course, it can be understood that the above description of oil flow is only an exemplary description to introduce the anti-roll principle. When the vehicle encounters other rolling conditions, the hydraulic suspension system 1000 can provide an anti-roll force by utilizing the above anti-roll principle.

[0076] In some embodiments of the present invention, Figure 1-Figure 2 , Figure 5 and Figure 6 As shown, the central control device 24 is provided with a first connection port 2401, the height adjustment device includes a liquid storage device and a shock absorber 200, the shock absorber 200 is provided corresponding to the wheel, the liquid storage device is used to transport oil to the shock absorber 200, and the first connection port 2401 is connected with the shock absorber 200. The first connection port 2401 is provided with a plurality of ports and includes a first port 24011, a second port 24012, a third port 24013 and a fourth port 24014, and the first port 24011, the second port 24012, the third port 24013 and the fourth port 24014 are respectively connected with the first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246. The provision of the first connection port 2401 realizes the connection between the plurality of shock absorbers 200 and the central control device 24, and also realizes the connection between different height adjustment devices and the central control device 24.

[0077] Furthermore, if Figure 1-Figure 2 , Figure 5 and Figure 6 As shown, the central control device 24 also includes a second connection port 2402, and the second connection port 2402 is suitable for connecting to the liquid storage device. The second connection port 2402 is provided with a plurality of ports including a fifth port 24021, a sixth port 24022, a seventh port 24023 and an eighth port 24024, and the fifth port 24021, the sixth port 24022, the seventh port 24023 and the eighth port 24024 are respectively connected to the first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246. Thus, the oil in the liquid storage device can pass through the central control device 24 and then enter the height adjustment device, thereby realizing the height adjustment when the vehicle is in a non-horizontal state. When the vehicle is in a non-horizontal state, the state of each height adjustment device is different. At this time, the liquid storage device passes the liquid to each height adjustment device through the central control device. The setting of the moving part 241 will automatically distribute the oil entering each height adjustment device, so that there is no need to calculate the amount of oil that needs to be passed into each height adjustment device according to the state of the vehicle, which is simple and convenient.

[0078] like Figure 6 As shown, in some examples of the present invention, the axis of the first connection port 2401 is perpendicular to the axis of the second connection port 2402. Thus, the peripheral space of the central control device 24 can be reasonably utilized, making the hydraulic suspension system 1000 more compact.

[0079] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the hydraulic suspension system 1000 further includes a first control valve 3, a second control valve 4, a third control valve 5 and a fourth control valve 6. The first control valve 3 is arranged between the fifth port 24021 and the liquid storage device, the second control valve 4 is arranged between the sixth port 24022 and the liquid storage device, the third control valve 5 is arranged between the seventh port 24023 and the liquid storage device, and the fourth control valve 6 is arranged between the eighth port 24024 and the liquid storage device. Thus, by controlling the operating states of the first control valve 3 to the fourth control valve 6, it is possible to control whether the oil in the liquid storage device needs to enter the height adjustment device through the central control device.

[0080] Furthermore, the control valve includes a first control valve 3, a second control valve 4, a third control valve 5 and a fourth control valve 6, and the control valve is used to selectively connect the second connection port 2402 and one of the shock absorbers to the liquid storage device. The channel switching in the control valve here can realize the liquid storage device directly to the height adjustment device, and can also realize the liquid storage device to the height adjustment device through the central control device. Therefore, there is no need to set up two branches and two valves to respectively realize the liquid storage device directly to the height adjustment device and the liquid storage device to the height adjustment device through the central control device.

[0081] Of course, in other embodiments, this can also be achieved by providing two branches and two valves.

[0082] In some embodiments of the present invention, a first connecting channel is arranged between the first control valve 3 and the fourth control valve 6, and a fifth control valve 7 is arranged on the first connecting channel; a second connecting channel is arranged between the second control valve 4 and the third control valve 5, and a sixth control valve 8 is arranged on the second connecting channel.

[0083] Specifically, when the fifth control valve 7 is opened, the fifth port 24021 is connected to the eighth port 24024, so that the first chamber 243 is connected to the fourth chamber 246. When the sixth control valve 8 is opened, the sixth port 24022 is connected to the seventh port 24023, so that the second chamber 244 is connected to the third chamber 245, so that multiple height adjustment devices are connected, and the purpose of maintaining the height of the vehicle body can be achieved.

[0084] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the moving member 241 includes a first portion 2410, a second portion 2411 and a third portion 2412, the first portion 2410 moves axially along the side wall of the housing 240 to separate the housing 240 into a first area and a second area, the second portion 2411 is connected to one side of the first portion 2410 and moves along the side wall of the housing 240 to separate the first area into a first chamber 243 and the second chamber 244, and the third portion 2412 is connected to the other side of the first portion 2410 and moves along the side wall of the housing 240 to separate the second area into a third chamber 245 and a fourth chamber 246. Thus, the structure of the moving member 241 is simple.

[0085] Further, the housing 240 has a first cylinder 2403, a second cylinder 2404 and a third cylinder 2405 which are sequentially arranged along the moving direction of the moving member 241, the inner diameter of the second cylinder 2404 is larger than the inner diameter of the first cylinder 2403 and larger than the inner diameter of the third cylinder 2405, a first chamber 243 is formed between the second portion 2411 and the inner wall of the first cylinder 2403, the first portion 2410 contacts the inner wall of the second cylinder 2404 to separate the second cylinder 2404 into the second chamber 244 and the third chamber 245, and a fourth chamber 246 is formed between the third portion 2412 and the inner wall of the third cylinder 2405. Thus, the structure of the central control device 24 is simple.

[0086] In some examples of the present invention, the extension direction of the first portion 2410 is perpendicular to the extension direction of the second portion 2411, and the extension direction of the second portion 2411 and the third portion 2412 are symmetrically arranged about the first portion 2410. Thus, the volumes of the first region and the second region are ensured to be the same.

[0087] In some embodiments of the present invention, a return spring is disposed between the moving member 241 and the end wall of the housing 240, so as to push the moving member 241 to return to the middle position.

[0088] Furthermore, if Figure 5 As shown, the central control device 24 also includes a first return spring 247 and a second return spring 248, the two ends of the first return spring 247 are respectively stopped at the left end of the housing 240 and the moving member 241, and the two ends of the second return spring 248 are respectively stopped at the right end of the housing 240 and the moving member 241, and the first return spring 247 and the second return spring 248 push the moving member 241 to reset toward the middle. Specifically, when the vehicle rolls and causes the moving member 241 to move to the left, the first return spring 247 can push the moving member 241 to the right to reset the moving member 241. When the vehicle rolls and causes the moving member 241 to move to the right, the second return spring 248 can push the moving member 241 to the left to reset the moving member 241, thereby ensuring the reliability of the central control device 24.

[0089] In some examples of the present invention, Figure 5 As shown, the central control device 24 includes a guide assembly 249, and the guide assembly 249 includes a first guide member 2490 and a second guide member 2491. The first guide member 2490 and the second guide member 2491 are slidably matched, the first guide member 2490 is fixed on the shell 240, and the second guide member 2491 is fixed on the moving member 241. The first return spring 247 is sleeved on the left guide assembly 249 and the first return spring 247 is stopped on the first guide member 2490, and the second return spring 248 is sleeved on the right guide assembly 249 and the second return spring 248 is stopped on the first guide member 2490. Therefore, by setting the guide assembly 249, not only the assembly of the first return spring 247 and the second return spring 248 is facilitated, but also the deformation degree of the first return spring 247 and the second return spring 248 is limited, so as to avoid failure of the first return spring 247 and the second return spring 248 due to excessive deformation.

[0090] Furthermore, the second guide member 2491 is a screw, and one end of the second guide member 2491 extends into the first guide member 2490 to moveably cooperate with the first guide member 2490, thereby making the structure of the guide assembly 249 simple and reliable.

[0091] like Figure 1-Figure 7 As shown, the hydraulic suspension system 1000 according to an embodiment of the present invention includes: a central control device 24, four groups of shock absorber assemblies 2 and a liquid storage device, the liquid storage device includes a liquid storage pot 1, wherein the height adjustment device includes the shock absorber assembly, and the liquid storage devices of the multiple groups of height adjustment devices are the same, thereby saving costs and making the hydraulic suspension system 1000 more compact.

[0092] The central control device 24 includes a shell 240 and a moving part 241. The moving part 241 is movably arranged in the shell 240 and cooperates with the shell 240 to define a first chamber 243, a second chamber 244, a third chamber 245 and a fourth chamber 246. The first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 are arranged sequentially in the moving direction of the moving part 241. The first chamber 243 and the second chamber 244 are distributed on one side of the first part 2411 of the moving part 241, and the third chamber 245 and the fourth chamber 246 are distributed on the other side of the first part 2411. The first part 2411 is movably cooperated with the inner wall of the shell 240.

[0093] The four groups of shock absorber assemblies 2 are divided into a left front shock absorber assembly 2, a left rear shock absorber assembly 2, a right front shock absorber assembly 2 and a right rear shock absorber assembly 2. Each group of shock absorber assemblies 2 includes a shock absorber 200. The shock absorber 200 includes a shock absorber housing 201, a piston 202 and a piston rod 203. The piston 202 is located in the shock absorber housing 201 to cooperate with the shock absorber housing 201 to define an upper chamber 2011 and a lower chamber 2012. The piston rod 203 is arranged on the piston 202 and the upper end of the piston rod 203 is suitable for connecting with the vehicle body. An oil channel 204 is arranged in the piston rod 203, and the oil channel 204 is connected with the lower chamber 2012. It should be noted that in the description of the present invention, the front refers to the direction toward the front of the vehicle, and the rear refers to the direction toward the rear of the vehicle. In the front direction, the right hand direction of the main driver is the right side, and the left hand direction of the main driver is the left side.

[0094] The oil channel 204 of the left front shock absorber assembly 2 is connected to one of the first chamber 243 and the second chamber 244, and the oil channel 204 of the right rear shock absorber assembly 2 is connected to the other of the first chamber 243 and the second chamber 244. The oil channel 204 of the left rear shock absorber assembly 2 is connected to one of the third chamber 245 and the fourth chamber 246, and the oil channel 204 of the right front shock absorber assembly 2 is connected to the other of the third chamber 245 and the fourth chamber 246. For the convenience of description, the principle description is given by taking the example that the oil channel 204 of the left front shock absorber assembly 2 is connected to the first chamber 243, the oil channel 204 of the right rear shock absorber assembly 2 is connected to the second chamber 244, the oil channel 204 of the left rear shock absorber assembly 2 is connected to the third chamber 245, and the oil channel 204 of the right front shock absorber assembly 2 is connected to the fourth chamber 246.

[0095] Specifically, when the vehicle has a roll tendency, for example, the piston rods 203 of the left front shock absorber assembly 2 and the left rear shock absorber assembly 2 are compressed, and the piston rods 203 of the right front shock absorber assembly 2 and the right rear shock absorber assembly 2 are stretched. At this time, the oil in the lower chamber 2012 of the left front shock absorber assembly 2 is discharged to the first chamber 243 through the oil channel 204, and the oil in the lower chamber 2012 of the left rear shock absorber assembly 2 is discharged to the third chamber 245 through the oil channel 204. 243 and the third chamber 245 are located on both sides of the first part 2411. The direction of the force exerted by the oil in the first chamber 243 on the first part 2411 is opposite to the direction of the force exerted by the third chamber 245 on the first part 2411. The two opposite forces cancel each other out so that the moving part 241 does not move, thereby suppressing the movement of the piston rod 203 of the left front shock absorber assembly 2 and the piston rod 203 of the left rear shock absorber assembly 2, thereby suppressing the roll.

[0096] When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is lifted so that the compression amplitude of the left front shock absorber assembly 2 is greater than the compression amplitude of the left rear shock absorber assembly 2, and the amount of oil discharged from the left front shock absorber assembly 2 into the first chamber 243 is greater than the amount of oil discharged from the left rear shock absorber assembly 2 into the third chamber 245, thereby causing the moving member 241 to move rightward to squeeze the third chamber 245 and the fourth chamber 246, and the oil in the third chamber 245 can be discharged into the lower chamber 2012 of the left rear shock absorber assembly 2 to move the piston rod 203 upward, and the oil in the fourth chamber 246 can be discharged into the lower chamber 2012 of the right front shock absorber assembly 2 to move the piston rod 203 upward, thereby reducing the possibility of the left rear wheel and the right front wheel leaving the ground and improving the vehicle stability.

[0097] Of course, it can be understood that the above-mentioned situations are merely exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel being lifted, the left rear wheel being lifted, etc., the oil will flow according to the above-mentioned linkage principle to improve the vehicle stability. Each working condition will not be described in detail here.

[0098] According to the hydraulic suspension system 1000 of the embodiment of the present invention, by providing a central control device 24 and four groups of shock absorber assemblies, each group of shock absorber assemblies 2 is provided with an oil channel 204, which can play a role in suppressing the roll when the vehicle has a roll tendency. When the heights of the four tires of the vehicle are inconsistent, the vehicle body height can be adjusted to reduce the tilt amplitude of the vehicle to prevent the vehicle from tilting.

[0099] like Figure 1 and Figure 2As shown, the liquid reservoir 1 is connected to the central control device via a third connecting channel, and the first control valve 3 to the fourth control valve 6 are respectively arranged on the corresponding third connecting channel for conducting or cutting off the corresponding third connecting channel. That is to say, when the control valve corresponding to each group of shock absorber assemblies 2 cuts off the corresponding third connecting channel, the flow channels between the liquid reservoir 1 and the corresponding first chamber, second chamber, third chamber and fourth chamber of the central control device are disconnected, and the oil in the liquid reservoir 1 will not flow into the corresponding central control device.

[0100] Specifically, the hydraulic suspension system 1000 has a lifting mode and a height lowering mode. In the lifting mode, the oil can enter the oil channel 204 of the left front shock absorber assembly 2, the oil channel 204 of the right front shock absorber assembly 2, the oil channel 204 of the left rear shock absorber assembly 2, and the oil channel 204 of the right rear shock absorber assembly 2. The hydraulic oil entering each oil channel 204 flows into the lower chamber 2012, thereby increasing the hydraulic pressure in the lower chamber 2012 and causing the piston 202 to move upward. The upward movement of the piston 202 drives the piston rod 203 to move upward. The piston rod 203 of the left front shock absorber assembly 2 moves upward, the piston rod 203 of the right front shock absorber assembly 2 moves upward, the piston rod 203 of the left rear shock absorber assembly 2 moves upward, and the piston rod 203 of the right rear shock absorber assembly 2 moves upward to drive the vehicle body to move upward, thereby achieving the purpose of lifting the vehicle body.

[0101] In the height reduction mode, the oil can flow out from the oil channel 204 of the left front shock absorber assembly 2, the oil channel 204 of the right front shock absorber assembly 2, the oil channel 204 of the left rear shock absorber assembly 2, and the oil channel 204 of the right rear shock absorber assembly 2 to the reservoir 1, and the hydraulic pressure of the lower chamber 2012 of each shock absorber 200 is reduced so that the piston 202 moves downward, and the piston 202 moves downward to drive the piston rod 203 to move downward. The piston rod 203 of the left front shock absorber assembly 2 moves downward, the piston rod 203 of the right front shock absorber assembly 2 moves downward, the piston rod 203 of the left rear shock absorber assembly 2 moves downward, and the piston rod 203 of the right rear shock absorber assembly 2 moves downward to drive the vehicle body to move downward, thereby achieving the purpose of reducing the height of the vehicle body.

[0102] When a vehicle is driving, it will encounter various road conditions. Once the suspension system of a vehicle with related technology is selected, it cannot be adjusted during the driving process of the vehicle. As a result, the traditional suspension can only ensure that the vehicle achieves the best performance match under a specific road and speed condition, and can only passively withstand the force of the ground on the vehicle body, but cannot change the suspension parameters according to different roads and vehicle speeds, and cannot actively control the force of the ground on the vehicle body.

[0103] According to the hydraulic suspension system 1000 of the embodiment of the present invention, the height of the vehicle body can be adjusted according to the road conditions, for example, when passing through a relatively rugged mountain road, the vehicle body can enter the lifting mode, which can increase the center of mass of the vehicle and improve the stability of the vehicle. When it is necessary to reduce the impact of the vehicle body on the driving speed, the height reduction mode can be entered to reduce the center of mass of the vehicle. Of course, it can be understood that the above is only an exemplary description, and the height of the vehicle body can also be adjusted according to actual needs during driving.

[0104] According to the hydraulic suspension system 1000 of the embodiment of the present invention, the height of the vehicle body can be adjusted, and the operational stability of the vehicle can be improved without damaging the comfort of the vehicle, effectively solving the contradiction between the comfort and the handling stability of the vehicle. At the same time, the hollow piston rod 203 can not only reduce the weight, but also use the oil channel 204 defined by the hollow piston rod 203 to achieve the discharge or discharge of oil to adjust the position of the piston rod 203, and the adjustment method is simple, reliable, low cost, and fast response speed.

[0105] like Figure 1-Figure 2 As shown, in some embodiments of the present invention, the liquid reservoir 1 has a liquid outlet and a liquid inlet, and the liquid storage device further includes a control pump 26 and an oil return valve 27. The control pump 26 is respectively connected to the liquid outlet and the third connecting channel to guide the oil in the liquid reservoir 1 to the third connecting channel. The oil return valve 27 is respectively connected to the liquid inlet and the third connecting channel. When the oil return valve 27 is opened, the oil flows from the third connecting channel to the liquid inlet. In other words, the liquid reservoir 1 has an independent liquid return channel and a liquid outlet channel. When liquid needs to be discharged, the control pump 26 is turned on and the oil return valve 27 is in a closed state, and the control pump 26 guides the oil to each group of shock absorber assemblies 2. When liquid return is required, the control pump 26 is closed and the oil return valve 27 is opened, and the oil flowing out of each group of shock absorber assemblies 2 can flow to the liquid reservoir 1 through the oil return valve 27. Thus, by setting two independent channels, the reliable discharge and return of liquid are guaranteed.

[0106] In some examples of the present invention, Figure 1-Figure 2 As shown, the control pump 26 includes a control valve body 260 and a drive motor 261. The drive motor 261 is electrically connected to the valve in the control valve body 260. The drive motor 261 rotates to control the valve to turn on or off the control pump 26. Thus, by using the drive motor 261 and the valve to cooperate to open or close the control pump 26, the control pump 26 can be operated more reliably, and the influence of oil on the opening or closing of the control pump 26 can be reduced.

[0107] Furthermore, if Figure 1-Figure 2As shown, the hydraulic suspension system 1000 also includes a one-way valve 28, which is arranged at the outlet end of the control pump 26 and is unidirectional. Therefore, when returning the liquid, due to the presence of the one-way valve 28, the oil can be effectively prevented from flowing to the control pump 26, and the oil can be prevented from flowing to the outlet through the control pump 26 when an accident occurs to the control pump 26.

[0108] In some embodiments of the present invention, Figure 1-Figure 2 As shown, the hydraulic suspension system 1000 further includes a pressure-stabilizing accumulator 29 , which is disposed at the outlet of the control pump 26 , so that the pressure-stabilizing accumulator 29 can stabilize the pressure and eliminate flow fluctuations at the outlet of the control pump 26 .

[0109] In some examples of the present invention, the pressure stabilizing accumulator 29 may be a metal bellows accumulator, such as Figure 7 As shown, the metal bellows accumulator consists of a barrel assembly and a bellows assembly. The barrel assembly includes an upper cover, a sealing ring, a cylinder, a retaining ring and a sealing ring; the bellows assembly includes a sealing cover, a guide ring, a bellows and a lower cover. The metal bellows accumulator can replace the airbag or diaphragm, using the metal bellows 101 as a flexible separation element between the fluid and the gas. The bellows can be used in a very wide temperature range. The metal bellows is welded to other components and is therefore completely airtight. It is able to move up and down inside the accumulator without any friction or wear, and can run for a long time with only one adjustment.

[0110] According to some embodiments of the present invention, Figure 1-Figure 2 As shown, the hydraulic suspension system 1000 further includes a pressure relief valve 31, which is located at the outlet port of the control pump 26. When the outlet pressure of the control pump 26 reaches a certain threshold, the pressure relief valve 31 opens to release pressure, thereby protecting the hydraulic suspension system 1000 within a normal pressure range. It should be noted that the working principle of the pressure relief valve 31 is already a prior art and will not be described in detail herein.

[0111] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the hydraulic suspension system 1000 also includes a first connecting channel and a second connecting channel, the first connecting channel is respectively connected to the oil channel 204 of the left front shock absorber assembly 2 and the oil channel 204 of the right front shock absorber assembly 2, and the first connecting channel is provided with a fifth control valve 7 for opening or closing it.

[0112] The second connecting channel is connected to the oil channel 204 of the left rear shock absorber assembly 2 and the oil channel 204 of the right rear shock absorber assembly 2 respectively, and a sixth control valve 8 for opening or closing the second connecting channel is provided on the second connecting channel.

[0113] Specifically, when the fifth control valve 7 is opened, the first connection channel is connected; when the fifth control valve 7 is closed, the first connection channel is blocked. When the sixth control valve 8 is opened, the second connection channel is connected; when the sixth control valve 8 is closed, the second connection channel is blocked.

[0114] When the height of the vehicle body needs to be maintained, the hydraulic suspension system 1000 can be switched to the height maintenance mode, the fifth control valve 7 and the sixth control valve 8 are both opened, the first connecting channel and the second connecting channel are connected, the oil channel 204 of the left front shock absorber assembly 2 is connected with the oil channel 204 of the right front shock absorber assembly 2; the oil channel 204 of the left rear shock absorber assembly 2 is connected with the oil channel 204 of the left rear shock absorber assembly 2. In other words, the piston rod 203 of the left front shock absorber assembly 2 and the piston rod 203 of the right front shock absorber assembly 2 are in a linkage state, and the piston rod 203 of the left rear shock absorber assembly 2 and the piston rod 203 of the left rear shock absorber assembly 2 are in a linkage state, so that the vehicle body can maintain the current height as much as possible.

[0115] In some embodiments of the present invention, Figure 1-Figure 2 As shown, the height adjustment device also includes a connecting channel and an accumulator module, the connecting channel is connected between the central control device and the corresponding shock absorber, the accumulator module includes a damping adjustment accumulator 9 and an opening adjustment valve 80, the damping adjustment accumulator 9 is connected between the shock absorber and the central control device, and the opening adjustment valve 80 is arranged between the damping adjustment accumulator 9 and the shock absorber. By adjusting the oil flow in the corresponding connecting channel, the damping of the corresponding connecting channel can be adjusted to achieve the purpose of adjusting the damping of the hydraulic suspension system 1000, so that the damping of the hydraulic suspension system 1000 can be adjusted according to actual conditions, for example, according to road conditions, etc., to ensure that the damping of the hydraulic suspension system 1000 can meet the vibration reduction requirements, and effectively solve the contradiction between vehicle comfort and handling stability. In some examples of the present invention, the opening adjustment valve 80 includes a first motor and a first valve body, and the first motor can control the movement of the valve in the first valve body to change the flow area of ​​the first valve body to achieve the purpose of adjusting the flow.

[0116] When the opening of the opening regulating valve 80 is reduced so that the amount of oil that can flow through the connecting channel is reduced, the flow channel of the shock absorber entering the connecting channel becomes narrower, and the damping of the shock absorber becomes larger. When the opening of the opening regulating valve 80 is increased, the flow channel of the shock absorber entering the connecting channel becomes wider, and the damping of the shock absorber becomes smaller. Therefore, through the cooperation of the damping regulating accumulator 9 and the opening regulating valve 80, the reliability of the damping adjustment of the hydraulic suspension system 1000 is guaranteed, and the amount of oil flowing in the connecting channel is guaranteed to match the required damping.

[0117] In some embodiments of the present invention, Figure 1-Figure 2As shown, the accumulator module includes a stiffness adjustment accumulator 10, and each group of shock absorber assemblies 2 is provided with a stiffness adjustment accumulator 10, which is connected to the connection channel at the stiffness adjustment connection point, and a stiffness adjustment valve 11 is provided between the stiffness adjustment accumulator 10 and the stiffness adjustment connection point, and the oil in the reservoir 1 can enter the stiffness adjustment accumulator 10 for energy storage. When the stiffness needs to be increased, the first control valve 3 to the fourth control valve 6 are all closed and the stiffness adjustment valve 11 is closed, so that the stiffness adjustment accumulator 10 is disconnected from the corresponding shock absorber 200, and the suspension stiffness is increased.

[0118] It is understandable that each stiffness regulating valve 11 can be adjusted independently, so that the stiffness of the front and rear sides of the hydraulic suspension system 1000 can be inconsistent to meet the requirements of different working conditions. For example, in the anti-nodding working condition and the turning anti-roll working condition of the vehicle, the front axle needs to provide greater stiffness, so the stiffness regulating valves 11 corresponding to the left front shock absorber assembly 2 and the right front shock absorber assembly 2 can be closed, and the stiffness regulating valves 11 corresponding to the right rear shock absorber assembly 2 and the left rear shock absorber assembly 2 can be opened.

[0119] In some examples of the present invention, the damping adjustment accumulator 9 adopts a metal bellows accumulator, and the stiffness adjustment accumulator 10 adopts a diaphragm accumulator. The diaphragm accumulator has a faster pressure storage capacity and a larger pressure storage capacity than the metal bellows accumulator. The diaphragm accumulator can reach a higher pressure storage capacity in a shorter time, so the stiffness adjustment accumulator 10 adopts a diaphragm accumulator to store pressure in each suspension to achieve vehicle body lifting. It should be noted that the energy storage principles of the metal bellows accumulator and the diaphragm accumulator are both existing technologies and will not be described in detail here.

[0120] In some embodiments of the present invention, Figure 1 As shown, the height adjustment device further includes a seventh control valve 12, which is arranged between the stiffness adjustment connection point and the damping adjustment accumulator 9. Specifically, the hydraulic suspension system 1000 may have a boost mode, in which the first control valve 3 to the fourth control valve 6 are all opened, the seventh control valve 12 is closed, and the stiffness adjustment valve 11 is opened, and the oil in the reservoir 1 enters the stiffness adjustment accumulator 10 for energy storage.

[0121] When it is necessary to switch to the lifting mode, the first control valve 3 to the fourth control valve 6 are all closed, the seventh control valve 12 is opened, and the stiffness regulating valve 11 is opened, and the oil in the stiffness regulating accumulator 10 enters the oil channel 204 to make the piston 202 rise. When it is necessary to switch to the height reduction mode, the first control valve 3 to the fourth control valve 6 are all opened, the seventh control valve 12 is opened, and the stiffness regulating valve 11 is closed, and the oil discharged from the oil channel 204 of the shock absorber 200 flows back into the liquid storage pot 1. Therefore, by setting the seventh control valve 12, the stiffness regulating valve 11 can be stored first, and when lifting or stiffness adjustment is required, it can be achieved by opening or closing the stiffness regulating valve 11, and the response speed is fast and reliable.

[0122] Furthermore, the hydraulic suspension system 1000 may also have a braking anti-nodding and acceleration anti-lifting modes. During the driving process of the vehicle, one of the first control valve 3 to the fourth control valve 6 corresponding to each shock absorber assembly 2 may be controlled to be closed, the seventh control valve 12 may be opened, and the stiffness regulating valve 11 may be closed. The oil channel 204 of each shock absorber assembly 2 is connected to the damping regulating accumulator 9, and the damping regulating accumulator 9 may adjust the amount of oil in the corresponding shock absorber 200. Therefore, the shock absorber 200 corresponding to each shock absorber assembly 2 has a reaction force on the movement trend of the vehicle body at the corresponding position, so that the hydraulic suspension system 1000 has a braking anti-nodding and acceleration anti-lifting modes.

[0123] like Figure 2 As shown, in some embodiments of the present invention, the liquid storage device also includes a central accumulator 13, and the first control valve 3 to the fourth control valve 6 corresponding to the multiple groups of shock absorber assemblies 2 are all connected to the central accumulator 13. That is to say, when the first control valve 3 to the fourth control valve 6 are all closed, the oil in the liquid storage pot 1 can enter the central accumulator 13 for energy storage. When the first control valve 3 to the fourth control valve 6 are all opened, the oil in the central accumulator 13 can flow to the oil channel 204 of each group of shock absorber assemblies 2, so that by setting the central accumulator 13, pressurization and energy storage can be performed first, ensuring that the oil can reliably flow to each group of shock absorber assemblies 2, so as to facilitate further adjustment of the damping system and stiffness coefficient of the hydraulic suspension system 1000. As shown Figure 2 As shown, in the lifting mode, the oil in the central accumulator 13 may be discharged into each oil channel 204 .

[0124] like Figure 1-Figure 2 As shown, in some embodiments of the present invention, each shock absorber assembly 2 is provided with a corresponding pressure reducing accumulator 30, and each pressure reducing accumulator 30 is connected with a corresponding oil channel 204. Therefore, during the driving process of the vehicle, if the vehicle is subjected to bumps and shocks, the oil in the lower chamber 2012 of each shock absorber assembly 2 can enter the pressure reducing accumulator 30 through the oil channel 204 for energy storage, thereby achieving the purpose of rapid pressure reduction.

[0125] like Figure 1-Figure 4 As shown, in some embodiments of the present invention, each set of shock absorber assemblies 2 includes a shock absorbing spring 205, and both ends of the shock absorbing spring 205 are suitable for connecting with the vehicle body and the axle. Therefore, by providing the shock absorbing spring 205, the buffering effect of each set of shock absorber assemblies 2 can be increased, and the bumps on the vehicle body during the driving process of the vehicle can be reduced.

[0126] Furthermore, if Figure 1-Figure 4 The outer sleeve of the shock absorber spring 205 of the left front shock absorber assembly 2 is fixed on the shock absorber 200, the outer sleeve of the shock absorber spring 205 of the right front shock absorber assembly 2 is fixed on the shock absorber 200, the shock absorber spring 205 of the left rear shock absorber assembly 2 is arranged in parallel with the shock absorber 200, and the shock absorber spring 205 of the right rear shock absorber assembly 2 is arranged in parallel with the shock absorber 200.

[0127] Reference below Figure 1-Figure 2 The hydraulic suspension system 1000 according to two specific embodiments of the present invention is described in detail. It can be understood that each of the above embodiments is only an exemplary description rather than a restrictive description, and each embodiment can be exemplarily modified according to actual conditions.

[0128] Embodiment 1:

[0129] like Figure 1 As shown, the hydraulic suspension system 1000 according to an embodiment of the present invention includes a left front shock absorber assembly 2, a right front shock absorber assembly 2, a left rear shock absorber assembly 2, a right rear shock absorber assembly 2, a liquid storage pot 1, a control pump 26, an oil return valve 27, a one-way valve 28, a pressure-stabilizing accumulator 29, a pressure relief valve 31 and an opening regulating valve 80, a damping regulating accumulator 9, a stiffness regulating accumulator 10, a pressure reducing accumulator 30, a central control device 24, a first connecting channel and a second connecting channel.

[0130] The left front shock absorber assembly 2 and the right front shock absorber assembly 2 both include a shock absorber 200 and a shock absorbing spring 205, and the shock absorbing spring 205 is fixed on the shock absorber 200. The left rear shock absorber assembly 2 and the right rear shock absorber assembly 2 both include a shock absorber 200 and a shock absorbing spring 205, and the shock absorbing spring 205 and the shock absorber 200 are arranged in parallel, and the two ends of the shock absorbing spring 205 of the left rear shock absorber assembly 2 are respectively connected to the vehicle body and the axle. The two ends of the shock absorbing spring 205 of the right rear shock absorber assembly 2 are respectively connected to the vehicle body and the axle. Each shock absorber 200 includes a shock absorber housing 201, a piston rod 203 and a piston 202. The piston rod 203 is connected to the piston 202. The piston 202 is movably arranged in the shock absorber housing 201 to define an upper chamber 2011 and a lower chamber 2012. An oil channel 204 is arranged in the piston rod 203, and the oil channel 204 is connected to the lower chamber 2012. The central control device is connected to the liquid storage pot 1 through the third connecting channel, and the first control valve 3 to the fourth control valve 6 are respectively arranged on the corresponding third connecting channels.

[0131] The liquid reservoir 1 has a liquid outlet and a liquid inlet, and the control pump 26 is connected to the liquid outlet and the third connecting channel respectively to guide the oil in the liquid reservoir 1 to the third connecting channel. The return valve 27 is connected to the liquid inlet and the third connecting channel respectively. When the return valve 27 is opened, the oil flows from the third connecting channel to the liquid inlet. The one-way valve 28 is arranged at the outlet end of the control pump 26 and is unidirectional. The pressure-stabilizing accumulator 29 is arranged at the outlet end of the control pump 26 and is located between the one-way valve 28 and the control pump 26. The pressure-stabilizing accumulator 29 can stabilize and eliminate the flow fluctuation at the outlet end of the control pump 26.

[0132] The hydraulic suspension system 1000 includes a common flow path and four branch flow paths, and the four branch flow paths are respectively connected to the oil channels 204 of the four shock absorber assemblies 2. The one-way valve 28 and the oil return valve 27 are respectively connected to the common flow path. The pressure relief valve 31 is connected to the common flow path.

[0133] The first control valve 3 to the fourth control valve 6 are respectively connected in series on the four branch flow paths in a one-to-one correspondence, and the first control valve 3 to the fourth control valve 6 are respectively used to control the conduction or cutoff of the corresponding branch flow paths.

[0134] The stiffness regulating accumulator 10 corresponding to each shock absorber assembly 2 is connected to the corresponding branch flow path, and the oil inlet and outlet of the stiffness regulating accumulator 10 are provided with a stiffness regulating valve 11, and the stiffness regulating valve 11 is in a normally closed state.

[0135] Each branch flow path is also provided with an opening regulating valve 80, a damping regulating accumulator 9 and a seventh control valve 12. The opening regulating valve 80 is used to adjust the flow through the corresponding branch flow path to adjust the damping of the hydraulic suspension system 1000. The damping regulating accumulator 9 can store energy. The seventh control valve 12 is provided between the damping regulating accumulator 9 and the stiffness regulating accumulator 10.

[0136] Each shock absorber assembly 2 is provided with a corresponding decompression accumulator 30. The decompression accumulator 30 corresponding to the left front shock absorber assembly 2 is directly connected to the piston rod 203 to communicate with the corresponding oil channel 204. The decompression accumulator 30 corresponding to the right front shock absorber assembly 2 is directly connected to the piston rod 203 to communicate with the corresponding oil channel 204. The decompression accumulator 30 corresponding to the left rear shock absorber assembly 2 is connected to the corresponding branch flow path. The decompression accumulator 30 corresponding to the right rear shock absorber assembly 2 is directly connected to the corresponding branch flow path.

[0137] Specifically, the hydraulic suspension system 1000 has a boost mode, a lifting mode, and a height reduction mode. In the boost mode, the first control valve 3 to the fourth control valve 6 are all opened and the seventh control valve 12 is closed, the stiffness adjustment valve 11 is opened, and the control pump 26 is operated so that the oil in the reservoir 1 flows through four branch flow paths to the corresponding stiffness adjustment accumulators 10 for energy storage. After each stiffness adjustment accumulator 10 is stored, the stiffness adjustment valve 11 is closed.

[0138] In the lifting mode, the oil in the reservoir 1 can enter the oil channel 204 of the left front shock absorber assembly 2, the oil channel 204 of the right front shock absorber assembly 2, the oil channel 204 of the left rear shock absorber assembly 2, and the oil channel 204 of the right rear shock absorber assembly 2. The hydraulic oil entering each oil channel 204 flows into the lower chamber 2012, thereby increasing the hydraulic pressure in the lower chamber 2012 and causing the piston 202 to move upward. The upward movement of the piston 202 drives the piston rod 203 to move upward. The piston rod 203 of the left front shock absorber assembly 2 moves upward, the piston rod 203 of the right front shock absorber assembly 2 moves upward, the piston rod 203 of the left rear shock absorber assembly 2 moves upward, and the piston rod 203 of the right rear shock absorber assembly 2 moves upward to drive the vehicle body to move upward, thereby achieving the purpose of lifting the vehicle body.

[0139] In the height reduction mode, the oil can flow out from the oil channel 204 of the left front shock absorber assembly 2, the oil channel 204 of the right front shock absorber assembly 2, the oil channel 204 of the left rear shock absorber assembly 2, and the oil channel 204 of the right rear shock absorber assembly 2, respectively. The hydraulic pressure of the lower chamber 2012 of each shock absorber 200 is reduced so that the piston 202 moves downward, and the piston 202 moves downward to drive the piston rod 203 to move downward. The piston rod 203 of the left front shock absorber assembly 2 moves downward, the piston rod 203 of the right front shock absorber assembly 2 moves downward, the piston rod 203 of the left rear shock absorber assembly 2 moves downward, and the piston rod 203 of the right rear shock absorber assembly 2 moves downward to drive the vehicle body to move downward, thereby achieving the purpose of reducing the height of the vehicle body. It is understandable that, in the height reduction mode, the oil discharged from each shock absorber assembly 2 can be discharged directly into the fluid reservoir 1, or discharged into the accumulator assembly for energy storage, or discharged into the fluid reservoir 1 and the accumulator assembly at the same time.

[0140] When the pressure in the hydraulic suspension system 1000 is relatively high, for example, when the pressure at the outlet of the detection control pump 26 reaches a certain threshold (30 MPa), the return oil valve 27 opens to release pressure to protect the hydraulic suspension system 1000 within a normal pressure range. At this time, the oil in each shock absorber 200 can flow into the liquid storage pot 1.

[0141] If the pressure in the hydraulic suspension system 1000 is still high after pressure relief or the pressure is high during operation, the pressure relief valve 31 can be opened to relieve pressure to ensure reliable operation of the entire hydraulic suspension system 1000 .

[0142] During vehicle driving, if the damping of the hydraulic suspension system 1000 is large, the vehicle body will be bumpy and the comfort will be affected. The damping of the hydraulic suspension system 1000 can be adjusted by adjusting the oil volume in each branch flow path through the opening regulating valve 80. When the opening of the opening regulating valve 80 is reduced, the flow path of the shock absorber entering the connecting channel becomes narrower, and the damping of the shock absorber becomes larger. When the opening of the opening regulating valve 80 is increased, the flow path of the shock absorber entering the connecting channel becomes wider, and the damping of the shock absorber becomes smaller, so that the damping of the hydraulic suspension system 1000 can be reliably adjusted.

[0143] When the stiffness of the hydraulic suspension system 1000 greatly reduces the comfort of the vehicle, the stiffness regulating valve 11 can be controlled to open, and the oil in the stiffness regulating accumulator 10 can be replenished into each branch flow path, thereby reducing the stiffness of the hydraulic suspension system 1000 and increasing the buffering effect of the hydraulic suspension system 1000 on bumps.

[0144] During the driving process of the vehicle, if the vehicle is subjected to bumps and shocks, the oil in the lower chamber 2012 of each shock absorber assembly 2 can enter the pressure reduction accumulator 30 through the oil channel 204 to store energy, thereby achieving the purpose of rapid pressure reduction. Since the front axle of the vehicle needs to ensure driving stability and the rear axle of the vehicle mainly needs to ensure comfort, the pressure reduction accumulator 30 corresponding to the left front shock absorber assembly 2 is directly connected to the piston rod 203 to communicate with the corresponding oil channel 204, and the pressure reduction accumulator 30 corresponding to the right front shock absorber assembly 2 is directly connected to the piston rod 203 to communicate with the corresponding oil channel 204, so that rapid pressure relief can be achieved.

[0145] The central control device 24 includes a shell 240 and a moving part 241. The moving part 241 is movably arranged in the shell 240 and cooperates with the shell 240 to define a first chamber 243, a second chamber 244, a third chamber 245 and a fourth chamber 246. The first chamber 243, the second chamber 244, the third chamber 245 and the fourth chamber 246 are arranged sequentially in the moving direction of the moving part 241. The first chamber 243 and the second chamber 244 are distributed on one side of the first part 2411 of the moving part 241, and the third chamber 245 and the fourth chamber 246 are distributed on the other side of the first part 2411. The first part 2411 is movably cooperated with the inner wall of the shell 240.

[0146] The oil channel 204 of the left front shock absorber assembly 2 is connected to one of the first chamber 243 and the second chamber 244, and the oil channel 204 of the right rear shock absorber assembly 2 is connected to the other of the first chamber 243 and the second chamber 244. The oil channel 204 of the left rear shock absorber assembly 2 is connected to one of the third chamber 245 and the fourth chamber 246, and the oil channel 204 of the right front shock absorber assembly 2 is connected to the other of the third chamber 245 and the fourth chamber 246. For the convenience of description, the principle description is given by taking the example that the oil channel 204 of the left front shock absorber assembly 2 is connected to the first chamber 243, the oil channel 204 of the right rear shock absorber assembly 2 is connected to the second chamber 244, the oil channel 204 of the left rear shock absorber assembly 2 is connected to the third chamber 245, and the oil channel 204 of the right front shock absorber assembly 2 is connected to the fourth chamber 246.

[0147] Specifically, when the vehicle has a roll tendency, for example, the piston rods 203 of the left front shock absorber assembly 2 and the left rear shock absorber assembly 2 are compressed, and the piston rods 203 of the right front shock absorber assembly 2 and the right rear shock absorber assembly 2 are stretched. At this time, the oil in the lower chamber 2012 of the left front shock absorber assembly 2 is discharged to the first chamber 243 through the oil channel 204, and the oil in the lower chamber 2012 of the left rear shock absorber assembly 2 is discharged to the third chamber 245 through the oil channel 204. 243 and the third chamber 245 are located on both sides of the first part 2411. The direction of the force exerted by the oil in the first chamber 243 on the first part 2411 is opposite to the direction of the force exerted by the third chamber 245 on the first part 2411. The two opposite forces cancel each other out so that the moving part 241 does not move, thereby suppressing the movement of the piston rod 203 of the left front shock absorber assembly 2 and the piston rod 203 of the left rear shock absorber assembly 2, thereby suppressing the roll.

[0148] When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is lifted so that the compression amplitude of the left front shock absorber assembly 2 is greater than the compression amplitude of the left rear shock absorber assembly 2, and the amount of oil discharged from the left front shock absorber assembly 2 into the first chamber 243 is greater than the amount of oil discharged from the left rear shock absorber assembly 2 into the third chamber 245, thereby causing the moving member 241 to move rightward to squeeze the third chamber 245 and the fourth chamber 246, and the oil in the third chamber 245 can be discharged into the lower chamber 2012 of the left rear shock absorber assembly 2 to move the piston rod 203 upward, and the oil in the fourth chamber 246 can be discharged into the lower chamber 2012 of the right front shock absorber assembly 2 to move the piston rod 203 upward, thereby increasing the distance between the right front wheel and the left rear wheel and the vehicle body to reduce the tilt amplitude of the vehicle and prevent the vehicle from rolling over.

[0149] Of course, it can be understood that the above-mentioned situations are merely exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel being lifted, the left rear wheel being lifted, etc., the oil flows according to the above-mentioned linkage principle to avoid the vehicle from rolling. Each working condition will not be described in detail here.

[0150] The first connecting channel is connected to the oil channel 204 of the left front shock absorber assembly 2 and the oil channel 204 of the right front shock absorber assembly 2 respectively, and a fifth control valve 7 for opening or closing the first connecting channel is provided on the first connecting channel.

[0151] The second connecting channel is connected to the oil channel 204 of the left rear shock absorber assembly 2 and the oil channel 204 of the right rear shock absorber assembly 2 respectively, and a sixth control valve 8 for opening or closing the second connecting channel is provided on the second connecting channel.

[0152] Specifically, when the fifth control valve 7 is opened, the first connection channel is connected; when the fifth control valve 7 is closed, the first connection channel is blocked. When the sixth control valve 8 is opened, the second connection channel is connected; when the sixth control valve 8 is closed, the second connection channel is blocked.

[0153] When the height of the vehicle body needs to be maintained, the hydraulic suspension system 1000 can be switched to the height maintenance mode, the fifth control valve 7 and the sixth control valve 8 are both opened, the first connecting channel and the second connecting channel are connected, the oil channel 204 of the left front shock absorber assembly 2 is connected with the oil channel 204 of the right front shock absorber assembly 2; the oil channel 204 of the left rear shock absorber assembly 2 is connected with the oil channel 204 of the left rear shock absorber assembly 2. In other words, the piston rod 203 of the left front shock absorber assembly 2 and the piston rod 203 of the right front shock absorber assembly 2 are in a linkage state, and the piston rod 203 of the left rear shock absorber assembly 2 and the piston rod 203 of the left rear shock absorber assembly 2 are in a linkage state, so that the vehicle body can maintain the current height as much as possible.

[0154] Embodiment 2:

[0155] like Figure 2 As shown, in this embodiment, compared with the first embodiment, the hydraulic suspension system 1000 according to the embodiment of the present invention is not provided with the seventh control valve 12 , and the hydraulic suspension system 1000 includes a central accumulator 13 .

[0156] It should be noted that, in this embodiment, in the boost mode, the oil in the liquid storage pot 1 flows to the central accumulator 13 and the stiffness adjustment accumulator 10 for energy storage.

[0157] The hydraulic suspension system 1000 of this embodiment has the same mode as that of Embodiment 1, and will not be described here.

[0158] The vehicle according to the embodiment of the present invention comprises the hydraulic suspension system 1000 according to any one of the above embodiments of the present invention.

[0159] According to the vehicle of the embodiment of the present invention, by providing the central control device 24 and the plurality of height adjustment devices, when the vehicle has a tendency to roll, the roll can be suppressed. When the heights of the four wheels of the vehicle are inconsistent, the vehicle body height can be adjusted to reduce the tilt of the vehicle and prevent the vehicle from rolling.

[0160] Other components of the vehicle according to the embodiment of the present invention, such as the brake system and operations, are well known to those skilled in the art and will not be described in detail here.

[0161] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0162] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A hydraulic suspension system, characterized in that: include: A plurality of height adjustment devices are provided corresponding to a plurality of wheels of the vehicle; A central control device, the central control device comprising a housing and a moving member, the moving member being movably disposed in the housing and dividing the housing into a first area and a second area in a moving direction of the moving member, the first area comprising a first chamber and a second chamber isolated from each other, and the second area comprising a third chamber and a fourth chamber isolated from each other; The first chamber, the second chamber, the third chamber and the fourth chamber are connected to the plurality of height adjustment devices in a one-to-one correspondence, the wheels corresponding to the height adjustment devices connected to the first chamber and the second chamber are located on a diagonal line, and the wheels corresponding to the height adjustment devices connected to the third chamber and the fourth chamber are also located on a diagonal line; A medium is provided in the height adjustment device. When a single height adjustment device is adjusted in height, the corresponding wheel rises, the medium enters the central control device, the moving member moves, and the medium enters the height adjustment device corresponding to the wheel on another diagonal line, so that the wheel on another diagonal line is lowered; The height adjustment device also includes a connecting channel and an accumulator module. The accumulator module also includes a stiffness adjustment accumulator and a stiffness adjustment valve. A stiffness adjustment connection point is provided on the connecting channel. The stiffness adjustment accumulator is connected to the stiffness adjustment connection point. The stiffness adjustment valve is provided between the stiffness adjustment accumulator and the stiffness adjustment connection point.

2. The hydraulic suspension system according to claim 1, characterized in that: The volume changes of the first chamber and the second chamber in the first region are opposite to the volume changes of the third chamber and the fourth chamber in the second region.

3. The hydraulic suspension system according to claim 1, characterized in that: The first chamber, the second chamber, the third chamber and the fourth chamber are arranged in sequence along the moving direction of the moving member.

4. The hydraulic suspension system according to claim 1, characterized in that: In an initial state, the first chamber has the same volume as the fourth chamber, and the second chamber has the same volume as the third chamber.

5. The hydraulic suspension system according to claim 1, characterized in that: One of the front axle height adjustment device and the rear axle height adjustment device is communicated with the first chamber and the third chamber, and the other of the front axle height adjustment device and the rear axle height adjustment device is communicated with the second chamber and the fourth chamber.

6. The hydraulic suspension system according to claim 1, characterized in that: One of the front axle height adjustment device and the rear axle height adjustment device is communicated with the first chamber and the fourth chamber, and the other of the front axle height adjustment device and the rear axle height adjustment device is communicated with the second chamber and the third chamber.

7. The hydraulic suspension system according to claim 1, characterized in that: The central control device is provided with a first connection port, the height adjustment device includes a liquid storage device and a shock absorber, the shock absorber is provided corresponding to the wheel, the liquid storage device is used to transport oil to the shock absorber, and the first connection port is communicated with the shock absorber; The first connection ports are provided in plurality and include a first port, a second port, a third port and a fourth port, and the first port, the second port, the third port and the fourth port are communicated with the first chamber, the second chamber, the third chamber and the fourth chamber respectively.

8. The hydraulic suspension system according to claim 7, characterized in that: The central control device further comprises a second connection port, wherein the second connection port is suitable for connecting to the liquid storage device; The second connection ports are provided in plurality and include a fifth port, a sixth port, a seventh port and an eighth port, and the fifth port, the sixth port, the seventh port and the eighth port are respectively connected to the first chamber, the second chamber, the third chamber and the fourth chamber.

9. The hydraulic suspension system according to claim 8, characterized in that: The axis of the first connection port is arranged perpendicular to the axis of the second connection port.

10. The hydraulic suspension system according to claim 8, characterized in that: The hydraulic suspension system also includes a first control valve, a second control valve, a third control valve and a fourth control valve. The first control valve is arranged between the fifth port and the liquid storage device, the second control valve is arranged between the sixth port and the liquid storage device, the third control valve is arranged between the seventh port and the liquid storage device, and the fourth control valve is arranged between the eighth port and the liquid storage device.

11. The hydraulic suspension system according to claim 10, characterized in that: The control valve includes the first control valve, the second control valve, the third control valve and the fourth control valve, and the control valve is used to selectively connect one of the second connecting port and the shock absorber to the liquid storage device.

12. The hydraulic suspension system according to claim 10, characterized in that: A first connecting channel is provided between the first control valve and the fourth control valve, and a fifth control valve is provided on the first connecting channel. A second connecting channel is provided between the second control valve and the third control valve, and a sixth control valve is provided on the second connecting channel.

13. The hydraulic suspension system according to claim 1, characterized in that: The moving part includes a first part, a second part and a third part, the first part moves axially along the side wall of the shell to separate the shell into the first area and the second area, the second part is connected to one side of the first part and moves along the side wall of the shell to separate the first area into the first chamber and the second chamber, and the third part is connected to the other side of the first part and moves along the side wall of the shell to separate the second area into the third chamber and the fourth chamber.

14. The hydraulic suspension system according to claim 13, characterized in that: The shell has a first cylinder, a second cylinder and a third cylinder arranged in sequence along the moving direction of the moving part, the inner diameter of the second cylinder is larger than the inner diameter of the first cylinder and larger than the inner diameter of the third cylinder, the first chamber is formed between the second part and the inner wall of the first cylinder, the first part contacts the inner wall of the second cylinder to separate the second cylinder into the second chamber and the third chamber, and the fourth chamber is formed between the third part and the inner wall of the third cylinder.

15. The hydraulic suspension system according to claim 13, characterized in that: An extension direction of the first portion is perpendicular to an extension direction of the second portion, and an extension direction of the second portion and the third portion are symmetrically arranged with respect to the first portion.

16. The hydraulic suspension system according to claim 13, characterized in that: The first chamber and the second chamber are located on one side of the first portion, and the third chamber and the fourth chamber are located on the other side of the first portion.

17. The hydraulic suspension system according to claim 1, characterized in that: A return spring is arranged between the moving member and the end wall of the shell.

18. The hydraulic suspension system according to claim 7, characterized in that: The shock absorber comprises a shock absorber housing, a piston and a piston rod. The shock absorber housing is suitable for being connected to a wheel. The piston is located in the shock absorber housing and cooperates with the shock absorber housing to define an upper chamber and a lower chamber. One end of the piston rod is connected to the piston, and the piston rod is suitable for being connected to a vehicle body. An oil channel is provided in the piston rod, and the oil channel is connected to the lower chamber. The liquid storage device is used to transport oil to the shock absorber through the oil channel.

19. The hydraulic suspension system according to claim 7, characterized in that: The connecting channel is used to connect the central control device with the corresponding shock absorber; The accumulator module includes a damping adjustment accumulator and an opening adjustment valve. The damping adjustment accumulator is connected between the shock absorber and the central control device, and the opening adjustment valve is arranged between the damping adjustment accumulator and the shock absorber.

20. The hydraulic suspension system according to claim 19, characterized in that: The height adjustment device further includes a seventh control valve, which is disposed between the stiffness adjustment connection point and the damping adjustment accumulator.

21. The hydraulic suspension system according to any one of claims 1 to 19, characterized in that: The central control device is a cylinder structure.

22. A vehicle, characterized in that: A hydraulic suspension system comprising any one of claims 1-21.

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