CN116409099A - Hydraulic suspension system and vehicle having same - Google Patents

Abstract

The invention discloses a hydraulic suspension system and a vehicle with the same. The hydraulic suspension system comprises a plurality of shock absorber assemblies, each shock absorber assembly comprises a shock absorber, a piston and a first cylinder body are matched to define an upper chamber and a lower chamber, and the upper end of a piston rod is suitable for being connected with a vehicle body; the upper chamber of the left front shock absorber assembly is communicated with the lower chamber of the left rear shock absorber assembly through a first pipeline, and the lower chamber of the left front shock absorber assembly is communicated with the upper chamber of the left rear shock absorber assembly through a second pipeline; the upper chamber of the right front shock absorber assembly is communicated with the lower chamber of the right rear shock absorber assembly through a third pipeline, and the lower chamber of the right front shock absorber assembly is communicated with the upper chamber of the right rear shock absorber assembly through a fourth pipeline. According to the hydraulic suspension system of the present invention, when the vehicle is subject to a pitch tendency, an anti-pitch force can be provided to avoid continued pitching of the vehicle.

Description

Hydraulic suspension system and vehicle having same

technical field

The invention relates to the field of vehicles, in particular to a hydraulic suspension system and a vehicle with the same.

Background technique

Suspension is a device that transmits the interaction force between the body and the axle. It is one of the four major components of the car and a key component that affects the driving performance of the car. The suspension can transmit the force and moment of road feedback, dampen the vibration of the wheel, alleviate the impact, improve the driver's driving experience, and enable the vehicle to obtain ideal sports characteristics and stable driving ability. The suspension of related art is mostly made up of spring, guiding mechanism and shock absorber etc., and the damping coefficient of shock absorber and spring stiffness are all fixed, only have damping function.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a hydraulic suspension system that can provide an anti-pitching force to avoid the vehicle from continuing to pitch.

The invention also proposes a vehicle with the above-mentioned hydraulic suspension system.

The hydraulic suspension system according to the embodiment of the present invention includes: a plurality of shock absorber assemblies, the plurality of shock absorber assemblies are divided into left front shock absorber assembly, left rear shock absorber assembly, right front shock absorber assembly assembly and the right rear shock absorber assembly, each set of the shock absorber assembly includes a shock absorber, the shock absorber includes a first cylinder, a piston and a piston rod, and the piston is located in the first cylinder The body cooperates with the first cylinder to define an upper chamber and a lower chamber, the piston rod is arranged on the piston and the upper end of the piston rod is suitable for connecting with the vehicle body; the left front shock absorber The upper chamber of the assembly communicates with the lower chamber of the left rear shock absorber assembly through a first pipeline, and the lower chamber of the left front shock absorber assembly communicates with a second pipeline It communicates with the upper chamber of the left rear shock absorber assembly; the upper chamber of the right front shock absorber assembly communicates with the lower chamber of the right rear shock absorber assembly through a third pipeline The lower chamber of the right front shock absorber assembly communicates with the upper chamber of the right rear shock absorber assembly through a fourth pipeline.

According to the hydraulic suspension system of the embodiment of the present invention, when the vehicle is prone to pitching, it can provide an anti-pitching force to prevent the vehicle from continuing to pitch, which can not only enhance the ride comfort of the vehicle, but also improve the driving stability and stability of the vehicle. safety.

In some embodiments of the present invention, the first pipeline communicates with the third pipeline through a first connecting pipeline to form a first loop, and the second pipeline communicates with the third pipeline through a second connecting pipeline. The fourth pipeline communicates to form the second circuit.

In some embodiments of the present invention, the hydraulic suspension system further includes a first regulating accumulator and a second regulating accumulator, the first regulating accumulator is connected to the first circuit, and the first regulating accumulator is connected to the first circuit. The oil inlet and outlet of a regulating accumulator is provided with a first regulating valve; the second regulating accumulator is connected to the second circuit, and the oil inlet and outlet of the second regulating accumulator are provided with a second regulator valve.

In some embodiments of the present invention, the first connecting pipeline is provided with a first on-off valve for conducting or blocking it, and the second connecting pipeline is provided with a second valve for conducting or blocking it. cut off valve.

In some embodiments of the present invention, the hydraulic suspension system further includes: a central control cylinder, the central control cylinder includes a second cylinder body and a moving part, and the moving part is movably arranged in the second cylinder body And cooperate with the second cylinder to define a first chamber, a second chamber, a third chamber and a fourth chamber, the first chamber, the second chamber, the third chamber The chamber and the fourth chamber are arranged sequentially in the moving direction of the moving member, the first chamber and the second chamber are distributed on one side of the middle contact portion of the moving member, so The third chamber and the fourth chamber are distributed on the other side of the middle contact part, and the middle contact part moves in cooperation with the inner wall of the second cylinder body; the left front shock absorber assembly The lower chamber is connected to one of the first chamber and the second chamber, and the lower chamber of the right rear shock absorber assembly is connected to the first chamber and the second chamber. The other of the second chambers is connected; the lower chamber of the left rear shock absorber assembly is connected with one of the third chamber and the fourth chamber, and the right front shock absorber The lower chamber of the device assembly is connected to the other of the third chamber and the fourth chamber.

In some embodiments of the present invention, in an initial state, the central control cylinder is arranged symmetrically with respect to the intermediate contact portion.

In some embodiments of the present invention, a through hole is formed in the piston rod, and the through hole passes through the piston rod to communicate with the lower chamber and the central control cylinder.

In some embodiments of the present invention, the hydraulic suspension system further includes a fluid supply circuit, the fluid supply circuit has a first branch, a second branch, a third branch and a fourth branch, the The first branch, the second branch, the third branch and the fourth branch communicate with the first chamber, the fourth chamber, the third chamber and the second chamber respectively, and the oil passes through the The central control cylinder communicates between the lower chamber of the shock absorber and the liquid supply oil passage.

In some embodiments of the present invention, a first control valve is provided on the first branch, a second control valve is provided on the second branch, a third control valve is provided on the third branch, and the A fourth control valve is arranged on the fourth branch.

In some embodiments of the present invention, a fifth control valve is provided between the first branch and the second branch, and a sixth control valve is provided between the third branch and the fourth branch .

In some embodiments of the present invention, a damping adjustment branch is provided between the central control cylinder and the lower chamber, and an opening adjustment valve is provided on the damping adjustment branch, and the hydraulic suspension system further includes A damping adjustment accumulator communicates with the damping adjustment branch.

In some embodiments of the present invention, each set of the shock absorber assembly includes a shock absorber spring, and the two ends of the shock absorber spring are adapted to be connected with the vehicle body and the axle.

In some embodiments of the present invention, the shock absorber spring cover of the left front shock absorber assembly is fixed on the shock absorber, and the shock absorber spring cover of the right front shock absorber assembly is fixed on On the shock absorber, the shock absorber spring of the left rear shock absorber assembly is arranged side by side with the shock absorber, and the shock absorber spring of the right rear shock absorber assembly and the shock absorber Vibrators are arranged side by side.

A vehicle according to an embodiment of the present invention includes the hydraulic suspension system according to the above-mentioned embodiments of the present invention.

According to the vehicle of the embodiment of the present invention, when the vehicle tends to pitch, an anti-pitch force can be provided to prevent the vehicle from continuing to pitch, which can not only enhance the comfort of the vehicle, but also improve the stability and safety of the vehicle.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and understandable from the description of the embodiments in conjunction with the following drawings, wherein:

1 is a schematic diagram of a hydraulic suspension system according to some embodiments of the present invention;

Fig. 2 is a schematic diagram of a hydraulic suspension system according to other embodiments of the present invention;

Fig. 3 is a schematic diagram of a hydraulic suspension system according to some other embodiments of the present invention;

Fig. 4 is a schematic diagram of a hydraulic suspension system according to still other embodiments of the present invention;

Fig. 5 is a schematic diagram of the hydraulic suspension system shown in Fig. 4 in a pressurized mode;

Fig. 6 is a schematic diagram of the hydraulic suspension system shown in Fig. 4 in a lifting mode;

Fig. 7 is a schematic diagram of the hydraulic suspension system shown in Fig. 4 in a height maintaining mode;

Fig. 8 is a schematic diagram of the hydraulic suspension system shown in Fig. 4 in a height lowering mode;

FIG. 9 is a schematic diagram of the hydraulic suspension system shown in FIG. 4 in an anti-roll mode;

FIG. 10 is a schematic diagram of the hydraulic suspension system shown in FIG. 4 in an anti-pitch mode;

FIG. 11 is a schematic diagram of the hydraulic suspension system shown in FIG. 4 in the anti-roll mode and the height maintenance mode;

12 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;

Fig. 13 is a sectional view of the shock absorber assembly shown in Fig. 12;

14 is a sectional view of a central control cylinder according to an embodiment of the present invention;

15 is a perspective view of a central control cylinder according to an embodiment of the present invention;

16 is a schematic diagram of a metal bellows accumulator according to an embodiment of the present invention.

Reference signs:

Hydraulic suspension system 1000,

Liquid storage pot 1,

Shock absorber assembly 2, shock absorber 200, first cylinder 201, upper chamber 2011, lower chamber 2012, piston 202, piston rod 203, through hole 204, damping spring 205,

The first control valve 3, the second control valve 4, the third control valve 5, the fourth control valve 6, the fifth control valve 7, the sixth control valve 8,

Opening regulating valve 80,

Damping adjustment accumulator 9,

Stiffness adjustment accumulator 10, metal bellows 101, stiffness adjustment valve 11, seventh control valve 12,

Central accumulator 13, central accumulator regulating valve 32,

The first regulating accumulator 16, the second regulating accumulator 17,

The first regulating valve 20, the second regulating valve 21,

The first on-off valve 22, the second on-off valve 23,

Central control cylinder 24, second cylinder body 240, moving member 241, moving body part 2410, intermediate contact part 2411, first chamber 243, second chamber 244, third chamber 245, fourth chamber 246, the first chamber A return spring 247, a second return spring 248, a guide assembly 249, a first guide 2490, a second guide 2491,

Control pump 26, control valve body 260, drive motor 261, oil return valve 27, check valve 28, pressure stabilizing accumulator 29, decompression accumulator 30, pressure relief valve 31.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The following describes a hydraulic suspension system 1000 according to an embodiment of the present invention with reference to FIGS. 1-16 , wherein the hydraulic suspension system 1000 is used on a vehicle, and the hydraulic suspension system 1000 is used to connect the axle and the body of the vehicle.

As shown in FIGS. 1-16 , a hydraulic suspension system 1000 according to an embodiment of the present invention includes: a plurality of shock absorber assemblies 2 . Multiple shock absorber assemblies 2 are divided into left front shock absorber assembly 2, left rear shock absorber assembly 2, right front shock absorber assembly 2 and right rear shock absorber assembly 2, each group of shock absorber assemblies 2 includes a shock absorber 200, the shock absorber 200 includes a first cylinder 201, a piston 202 and a piston rod 203, the piston 202 is located in the first cylinder 201 to cooperate with the first cylinder 201 to define an upper chamber 2011 and In the 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. It should be noted that, in the description of the present invention, the front refers to the direction towards the front of the vehicle, and the rear refers to the direction towards the rear of the vehicle. In the forward direction, the direction of the right hand of the main driver is the right side. Take the left hand direction of the main driver as the left side.

As shown in Figures 1-11, the upper chamber 2011 of the left front shock absorber assembly 2 communicates with the lower chamber 2012 of the left rear shock absorber assembly 2 through the first pipeline, and the left front shock absorber assembly 2 The lower chamber 2012 communicates with the upper chamber 2011 of the left rear shock absorber assembly 2 through a second pipeline.

The upper chamber 2011 of the right front shock absorber assembly 2 communicates with the lower chamber 2012 of the right rear shock absorber assembly 2 through the third pipeline, and the lower chamber 2012 of the right front shock absorber assembly 2 passes through the fourth pipeline It communicates with the upper chamber 2011 of the right rear shock absorber assembly 2 .

Specifically, when the vehicle has a pitching tendency, that is, one of the front side and the rear side of the hydraulic suspension system 1000 is compressed, for example, the left front shock absorber assembly and the right front shock absorber assembly are compressed, and the left front shock absorber assembly The oil in the lower chamber 2012 of the assembly 2 flows into the upper chamber 2011 of the left rear shock absorber assembly 2 through the second pipeline, and the oil in the lower chamber 2012 of the right front shock absorber assembly 2 It flows into the upper chamber 2011 of the right rear shock absorber assembly 2 through the fourth pipeline, so that the pistons of the left rear shock absorber assembly 2 and the right rear shock absorber assembly 2 descend, thereby making the left rear shock absorber The shock absorber assembly and the right rear shock absorber are also compressed, which in turn makes the front and rear in line to prevent the vehicle from continuing to pitch.

Of course, it can be understood that the above oil flow path description is only an exemplary description to introduce the anti-pitch principle, when the rear side is compressed and the front side is stretched, using the above-mentioned anti-pitch principle, the hydraulic suspension system 1000 can provide An anti-pitch force.

According to the hydraulic suspension system 1000 of the embodiment of the present invention, when the vehicle pitches, it can provide an anti-pitching force to avoid the vehicle from continuing to pitch, which can not only enhance the comfort of the vehicle, but also improve the stability of the vehicle. and security.

Further, as shown in Figures 1-11, the first pipeline communicates with the third pipeline through the first connecting pipeline to form a first circuit, and the second pipeline communicates with the fourth pipeline through the second connecting pipeline to form a second loop. It can be seen that by forming the first loop and the second loop, the right front shock absorber assembly 2, the right rear shock absorber assembly 2, the left front shock absorber assembly 2 and the left rear shock absorber assembly 2 can be realized. The linkage adjustment further ensures that the pitching moment can be provided to prevent the vehicle from continuing to pitch.

As shown in Figures 1-11, in a further embodiment of the present invention, the hydraulic suspension system 1000 further includes a first adjusting accumulator 16 and a second adjusting accumulator 17, the first adjusting accumulator 16 is connected to The first circuit, the oil inlet and outlet of the first regulating accumulator 16 is provided with a first regulating valve 20 . The second regulating accumulator 17 is connected to the second circuit, and the oil inlet and outlet of the second regulating accumulator 17 are provided with a second regulating valve 21 . It should be explained that the first regulating accumulator 16 and the second regulating accumulator 17 can play the role of energy storage, that is, oil can flow into the first regulating accumulator 16 and the second regulating accumulator 17 When the hydraulic suspension system 1000 needs it, the oil in the first adjusting accumulator 16 and the second adjusting accumulator 17 is discharged for replenishment. Specifically, the first regulating accumulator 16 and the second regulating accumulator 17 can adopt diaphragm accumulators, and diaphragm accumulators can achieve a higher pressure storage capacity in a short period of time. It should be noted that , the principle of the diaphragm accumulator is already in the prior art, and will not be described in detail here.

The stiffness of the hydraulic suspension system 1000 can be adjusted by controlling the opening and closing states of the first regulating valve 20 and the second regulating valve 21, for example, when the first regulating valve 20 and the second regulating valve 21 are closed, the first regulating energy storage The accumulator 16 is disconnected from the first circuit, and the second regulating accumulator 17 is disconnected from the second circuit, so that the stiffness of the hydraulic suspension system 1000 can be increased.

In some embodiments of the present invention, as shown in Fig. 1 and Fig. 2, a first on-off valve 22 for conducting or blocking is provided on the first connecting pipeline, and a first on-off valve 22 for conducting or shutting off is provided on the second connecting pipeline. Its second on-off valve 23 is closed. That is to say, when the first on-off valve 22 is closed, the first pipeline and the third pipeline are disconnected, and when the second on-off valve 23 is closed, the second pipeline and the fourth pipeline are disconnected. so that it can be determined according to actual needs whether multiple shock absorber assemblies 2 need to be linked.

As shown in FIGS. 3-11 , in some embodiments of the present invention, the hydraulic suspension system 1000 further includes a central control cylinder 24, wherein the central control cylinder 24 includes a second cylinder body 240 and a moving part 241, and the moving part 241 can Movably arranged in the second cylinder 240 and cooperate with the second cylinder 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, and the first chamber 243 and the second chamber 244 are distributed in the middle contact part of the moving part 241 On one side of 2411 , the third chamber 245 and the fourth chamber 246 are distributed on the other side of the middle contact part 2411 , and the middle contact part 2411 is in cooperation with the inner wall of the second cylinder 240 for movement.

The lower chamber 2012 of the left front shock absorber assembly 2 is connected with one of the first chamber 243 and the second chamber 244, and the lower chamber 2012 of the right rear shock absorber assembly 2 is connected with the first chamber 243 and the second chamber 244. The other of the second chambers 244 is connected. The lower chamber 2012 of the left rear shock absorber assembly 2 is connected to one of the third chamber 245 and the fourth chamber 246, and the lower chamber 2012 of the right front shock absorber assembly 2 is connected to the third chamber 245 and the fourth chamber 246. The other of the fourth chambers 246 is connected. For the convenience of description below, the lower chamber 2012 of the left front shock absorber assembly 2 is connected to the first chamber 243, the lower chamber 2012 of the right rear shock absorber assembly 2 is connected to the second chamber 244, and the left rear shock absorber assembly 2 is connected to the second chamber 244. The lower chamber 2012 of the shock absorber assembly 2 is connected to the third chamber 245, and the lower chamber 2012 of the right front shock absorber assembly 2 is connected to the fourth chamber 246 as an example to describe the principle.

Specifically, when the vehicle has a rolling 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 right front shock absorber assembly 2 and the right rear shock absorber assembly The piston rod 203 formed in two is 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, and the oil in the lower chamber 2012 of the left rear shock absorber assembly 2 The oil in the first chamber 243 is discharged to the third chamber 245. Since the first chamber 243 and the third chamber 245 are located on both sides of the middle contact portion 2411, the force of the oil in the first chamber 243 on the middle contact portion 2411 The direction is opposite to the direction of the acting force of the third chamber 245 on the middle contact portion 2411, and the acting forces of the two opposite directions cancel each other so that the moving member 241 does not move, so that the piston rod 203 of the left front shock absorber assembly 2 can be restrained And the movement of the piston rod 203 of the left rear shock absorber assembly 2 can play a role in suppressing roll.

When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is raised so that the compression range of the left front shock absorber assembly 2 is greater than the compression range of the left rear shock absorber assembly 2, from the left front shock absorber assembly 2 The amount of oil discharged 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, so that the moving member 241 moves rightward and squeezes the third chamber. The third chamber 245 and the fourth chamber 246, the oil in the third chamber 245 can be discharged into the lower chamber 2012 of the left rear shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, The oil in the fourth chamber 246 can be discharged into the lower chamber 2012 of the right front shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, thereby reducing the wheel separation between the left rear wheel and the right front wheel. ground risk, increasing vehicle stability.

Of course, it can be understood that the above situations are only exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel is raised, the left rear wheel is raised, etc., the oil will flow according to the above linkage principle to avoid the vehicle from appearing. Roll, here does not describe each working condition in detail.

In some embodiments of the present invention, in an initial state, the central control cylinder 24 is arranged symmetrically with respect to the middle contact portion 2411 . That is to say, in the initial state, the volume of the first region defined by the first chamber 243 and the second chamber 244 is the same as the volume of the second region defined by the third chamber 245 and the fourth chamber 246, Therefore, when the vehicle encounters a rolling tendency during driving, it can respond quickly to avoid the vehicle from rolling. It should be noted that the above "initial state" refers to the smooth running of the vehicle (that is, the left front shock absorber assembly 2, the right front shock absorber assembly 2, the right rear shock absorber assembly 2 and the left rear shock absorber assembly The piston rod 203 of the assembly 2 is at the same height) or the state when the vehicle is not running.

In a further embodiment of the present invention, as shown in FIGS. 1-13 , a through hole 204 is formed in the piston rod 203 , and the through hole 204 penetrates the piston rod 203 to communicate with the lower chamber 2012 and the central control cylinder 24 . That is to say, the oil in the lower chamber 2012 is discharged to the central control cylinder 24 through the through hole 204 in the piston rod 203, or the oil in the central control cylinder 24 is discharged to the lower chamber through the through hole 204 in the piston rod 203 chamber 2012, so that the through hole 204 is provided in the piston rod 203 to realize the oil liquid entering and exiting the lower chamber 2012, and the weight of the shock absorber 200 can be reduced. And because the top of the piston rod 203 is connected to the vehicle body (that is, the position of the top of the piston rod 203 and the vehicle body is relatively fixed), therefore, because the top of the piston rod 203 and the central control cylinder 24 are connected by an oil circuit, the junction of the oil circuit is relatively Stable, avoiding wear and tear due to vibration as much as possible, can make the oil discharge in or out more stable, and avoid unstable oil in and out due to body shaking.

In some embodiments of the present invention, as shown in Fig. 1-Fig. Four branches, the first branch, the second branch, the third branch and the fourth branch communicate with the first chamber 243, the fourth chamber 246, the third chamber 245 and the second chamber 244 respectively, The oil circulates between the lower chamber 2012 of the shock absorber 200 and the oil supply circuit through the central control cylinder 24 . It can be understood that the liquid supply circuit is connected to the liquid storage device, and the oil in the liquid storage device is discharged to the lower chamber 2012 of the shock absorber 200 and the central control cylinder 24 through the liquid supply circuit respectively. Thereby, an oil circuit circulation can be formed to ensure that the oil can enter or exit the central control cylinder 24, so that the moving part 241 of the central control cylinder 24 can move reliably.

Further, as shown in Figure 3-Figure 11, a first control valve 3 is provided on the first branch, a second control valve 4 is provided on the second branch, a third control valve 5 is provided on the third branch, and a fourth control valve 5 is provided on the fourth branch. A fourth control valve 6 is arranged on the branch. That is to say, the first control valve 3 can control the on-off of the first branch, the second control valve 4 can control the on-off of the second branch, the third control valve 5 can control the on-off of the third branch, and the second control valve 4 can control the on-off of the third branch. The four control valve 6 can control the on-off of the fourth branch, so that by controlling the operating states of the first control valve 3 to the fourth control valve 6, it is possible to control whether the central control cylinder 24 and the lower chamber 2012 of the shock absorber 200 Oil is provided inside. It can be understood that when the first control valve 3 to the fourth control valve 6 are all in the closed state, when the vehicle has a rolling tendency, the oil can pass through the corresponding branch in the lower chamber 2012 and the corresponding central control cylinder 24 The flow in the chamber makes the four shock absorber assemblies 2 linked, and the height of the vehicle can be adjusted to reduce the inclination of the vehicle and prevent the vehicle from rolling.

As shown in Fig. 2 and Fig. 4-Fig. 11, in some embodiments of the present invention, a fifth control valve 7 is arranged between the first branch and the second branch, and the third branch and the fourth branch A sixth control valve 8 is provided between them.

Specifically, when the fifth control valve 7 is opened, the first branch communicates with the second branch, and the lower chamber 2012 of the left front shock absorber assembly 2 communicates with the lower chamber 2012 of the right front shock absorber assembly 2; When the fifth control valve 7 is closed, the first branch and the second branch are disconnected, and the lower chamber 2012 of the left front shock absorber assembly 2 and the lower chamber 2012 of the right front shock absorber assembly 2 are not connected to each other. . When the sixth control valve 8 is opened, the third branch and the fourth branch are connected, and the lower chamber 2012 of the left rear shock absorber assembly 2 communicates with the lower chamber 2012 of the right rear shock absorber assembly 2; When the six control valve 8 is closed, the third branch and the fourth branch are not connected to each other, and the lower chamber 2012 of the left rear shock absorber assembly 2 and the lower chamber 2012 of the right rear shock absorber assembly 2 are not connected to each other .

When it is necessary to maintain the height of the vehicle body, the hydraulic suspension system 1000 can be switched into the height maintaining mode, the fifth control valve 7 and the sixth control valve 8 are both opened, the first branch and the second branch are connected, and the left front shock absorber The lower chamber 2012 of the assembly 2 communicates with the lower chamber 2012 of the right front shock absorber assembly 2; the lower chamber 2012 of the left rear shock absorber assembly 2 communicates with the lower chamber 2012 of the right rear shock absorber assembly 2 connected. That is to say, 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 linked state, and the piston rod 203 of the left rear shock absorber assembly 2 and the right rear shock absorber assembly The two piston rods 203 are in a linked state, so that the vehicle body can maintain the current height as much as possible.

In some embodiments of the present invention, as shown in FIG. 14 , the moving part 241 includes a moving body part 2410, and the intermediate contact part 2411 is an annular protrusion provided on the moving body part 2410. In the moving direction of the moving part 241, The second cylinder body 240 is provided with a central cavity, a left cavity and a right cavity, and the protruding entrance of the left cavity and the protruding entrance of the right cavity are located on the inner wall of the central cavity. The left end of the moving body part 2410 extends into the left cavity through the opening of the left cavity, and the right end of the moving body part 2410 extends into the right cavity through the opening of the right cavity.

A first chamber 243 is defined between the left end of the mobile body part 2410 and the left cavity, a part of the mobile body part 2410 is slidably fitted with the inner wall of the left cavity, and the middle contact part 2411 is slidably fitted with the inner wall of the middle cavity to define Out of the second chamber 244 and the third chamber 245 , a fourth chamber 246 is defined between the right end of the moving body part 2410 and the right cavity. This makes the structure of the central control cylinder 24 simple.

Further, as shown in FIG. 14 , the central control cylinder 24 also includes a first return spring 247 and a second return spring 248 , and the two ends of the first return spring 247 stop against the left end of the second cylinder body 240 and the moving member 241 respectively. , the two ends of the second return spring 248 abut against the second cylinder 240 and the right end of the moving piece 241 respectively, and the first return spring 247 and the second return spring 248 push the moving piece 241 to return toward the middle. Specifically, when the vehicle rolls so that the moving member 241 moves to the left, the first return spring 247 can push the moving member 241 to the right to return the moving member 241 . When the vehicle rolls so that the moving part 241 moves to the right, the second return spring 248 can push the moving part 241 to the left to reset the moving part 241 , thereby ensuring the reliability of the central control cylinder 24 .

In some examples of the present invention, as shown in FIG. 14, the central control cylinder 24 includes a guide assembly 249, the wire assembly includes a first guide 2490 and a second guide 2491, and the first guide 2490 and the second guide 2491 slide Cooperate, the first guide piece 2490 is fixed on the second cylinder body 240, the second guide piece 2491 is fixed on the moving piece 241, the first return spring 247 is sleeved on the guide assembly 249 on the left side and the first return spring 247 stops On the first guide 2490, the second return spring 248 is sleeved on the guide assembly 249 on the right side and the second return spring 248 stops against the first guide 2490, thus by setting the guide assembly 249 not only facilitates the first return spring The assembly of 247 and the second return spring 248 is also convenient to limit the degree of deformation of the first return spring 247 and the second return spring 248, so as to avoid failure due to excessive deformation of the first return spring 247 and the second return spring 248.

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 move and cooperate with the first guide member 2490 , so that the structure of the guide assembly 249 is simple and reliable.

As shown in FIG. 15 , the ports where the central control cylinder 24 is connected to the piston rods 203 of the four shock absorber assemblies 2 are located on the same side, so as to facilitate pipeline connection.

As shown in Figures 1-11, in some embodiments of the present invention, each set of shock absorber assemblies 2 includes a shock absorber spring 205, and the two ends of the shock absorber spring 205 are suitable for connecting with the vehicle body and the axle. Therefore, by setting the damping spring 205, the buffering effect of each set of shock absorber assemblies 2 can be increased, and the bumping of the vehicle body during the running of the vehicle can be reduced.

Further, as shown in Figures 1-11, the shock absorber spring 205 of the left front shock absorber assembly 2 is fixed on the shock absorber 200, and the shock absorber spring 205 of the right front shock absorber assembly 2 is fixed on the shock absorber On the device 200, the damping spring 205 of the left rear shock absorber assembly 2 is arranged side by side with the shock absorber 200, and the shock absorber spring 205 of the right rear shock absorber assembly 2 is arranged side by side with the shock absorber 200.

As shown in FIGS. 1-11 , in some embodiments of the present invention, each shock absorber assembly 2 is correspondingly provided with a decompression accumulator 30 , and each decompression accumulator 30 is connected to a corresponding through hole 204 connected. Therefore, when the vehicle is running, if the vehicle is bumped and impacted, the oil in the lower chamber 2012 of each shock absorber assembly 2 can enter the decompression accumulator 30 through the through hole 204 for energy storage. , to achieve the purpose of fast step-down.

As shown in FIGS. 1-13 , in some embodiments of the present invention, a through hole 204 is provided in the piston rod 203 , and the through hole 204 communicates with the lower chamber 2012 . The hydraulic suspension system 1000 also includes a liquid storage pot 1. The liquid storage pot 1 is connected to the through hole 204 of the left front shock absorber assembly 2 through the first branch, and the liquid storage pot 1 is connected to the right front shock absorber assembly through the second branch. The two through holes 204 are connected, the liquid storage pot 1 is connected with the through hole 204 of the left rear shock absorber assembly 2 through the third branch, and the liquid storage pot 1 is connected with the right rear shock absorber assembly 2 through the fourth branch. The through hole 204 is connected, the first branch is provided with a first control valve 3 for conducting or shutting it off, the second branch is provided with a second control valve 4 for conducting or shutting it off, and the third branch is provided with a A fourth control valve 6 for conducting or shutting off the third control valve 5 is provided on the fourth branch.

That is to say, when the control valve corresponding to each group of shock absorber assemblies 2 cuts off the corresponding branch, the flow path between the liquid storage pot 1 and the through hole 204 of the corresponding shock absorber assembly 2 is disconnected, and the reservoir The oil in the liquid pot 1 will not flow into the corresponding shock absorber 200 , and the oil in the shock absorber 200 will not flow into the liquid storage pot 1 either.

Specifically, the hydraulic suspension system 1000 has a lifting mode and a lowering mode. In the lifting mode, oil can enter the through hole 204 of the left front shock absorber assembly 2 and the through hole of the right front shock absorber assembly 2. 204. In the through hole 204 of the left rear shock absorber assembly 2 and the through hole 204 of the right rear shock absorber assembly 2, the hydraulic oil entering each through hole 204 flows into the lower chamber 2012, so that The hydraulic pressure in the lower chamber 2012 increases to make the piston 202 move upward, and 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 right rear shock absorber assembly The piston rod 203 of 2 moves upwards to drive the vehicle body to move upwards, so as to realize the purpose of lifting the vehicle body.

In height lowering mode, the oil can flow from the through hole 204 of the left front shock absorber assembly 2, the through hole 204 of the right front shock absorber assembly 2, the through hole 204 of the left rear shock absorber assembly 2 and the right rear shock absorber The through hole 204 of the vibrator assembly 2 flows out to be discharged to the liquid storage pot 1, and the hydraulic pressure in the lower chamber 2012 of each shock absorber 200 is reduced so that the piston 202 moves downward, and the downward movement of the piston 202 drives the piston rod 203 to move downward. Move down. 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 right rear shock absorber The piston rod 203 of the device assembly 2 moves downward to drive the vehicle body to move downward, so as to achieve the purpose of reducing the height of the vehicle body.

During the running of the vehicle, various road conditions can be encountered. Once the suspension system of the vehicle of the related art is selected, it cannot be adjusted during the running of the vehicle, so that the traditional suspension can only ensure that the vehicle is in a certain position. Under a specific road and speed conditions, it can achieve the best performance matching, and can only passively bear the force of the ground on the body, but cannot change the suspension parameters according to the road and speed, let alone actively control the ground. force on the body.

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, it can enter the lifting mode, which can improve the center of mass of the vehicle and improve the stability of the vehicle. . When it is necessary to reduce the influence of the body on the driving speed, it can enter the height reduction mode, so that the center of mass of the vehicle is lowered. 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.

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 operating stability of the vehicle can be improved without compromising the comfort of the vehicle, effectively solving the problem between the comfort of the vehicle and the handling stability. contradiction. At the same time, the use of the hollow piston rod 203 can not only reduce the weight, but also use the through hole 204 defined by the hollow piston rod 203 to realize the discharge or discharge of oil to adjust the position of the piston rod 203, the adjustment method is simple, the reliability is high, and the cost is low , the corresponding speed is fast.

As shown in Figures 1-11, in some embodiments of the present invention, the liquid storage pot 1 has a liquid outlet and a liquid inlet, and the hydraulic suspension system 1000 also includes a control pump 26 and an oil return valve 27, and the control pump 26 Connected with the liquid outlet, the control valve 26 is respectively connected with the first branch to the fourth branch to guide the oil in the liquid storage pot 1 to the first branch to the fourth branch. The oil return valve 27 is respectively connected with the liquid inlet and the first branch to the fourth branch. When the oil return valve 27 is opened, the oil flows from at least one of the first branch to the fourth branch to the liquid inlet. That is to say, the liquid storage pot 1 has an independent liquid return channel and a liquid outlet channel. When liquid is required, for example, in the lifting mode, 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 shock absorber assembly 2. When liquid return is required, such as in height lowering mode, the control pump 26 is closed and the oil return valve 27 is opened, and the oil flowing out from each shock absorber assembly 2 can flow to the liquid storage pot 1 through the oil return valve 27 . Therefore, by setting two independent channels, the reliable operation of liquid outlet and liquid return is ensured.

In some examples of the present invention, as shown in Figures 1-11, 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, and the drive motor 261 rotates to control The valve is rotated to effect control of pump 26 on or off. Therefore, the opening or closing of the control pump 26 can be realized through the cooperation of the driving motor 261 and the valve, which can ensure the reliable operation of the control pump 26 and reduce the influence of oil on the opening or closing of the control pump 26 .

Further, as shown in Figures 1-11, the hydraulic suspension system 1000 also includes a one-way valve 28, which is set at the outlet end of the control pump 26 and conducts in one direction. The existence of the valve 28 can effectively prevent the oil from flowing to the control pump 26, and prevent the oil from flowing to the liquid outlet through the control pump 26 when an accident occurs in the control pump 26.

In some embodiments of the present invention, as shown in Fig. 1-Fig. The accumulator 29 can stabilize the pressure and eliminate flow fluctuations at the outlet port of the control pump 26 .

In some examples of the present invention, the pressure-stabilizing accumulator 29 may be a metal bellows accumulator. As shown in FIG. 16 , the metal bellows type accumulator consists of a cylinder assembly and a bellows assembly. The barrel assembly includes an upper cover, a sealing ring, a cylinder barrel, a snap ring and a sealing ring; the bellows assembly includes a sealing cover, a guide ring, a bellows and a lower cover. Metal bellows accumulators can replace bladders or diaphragms, using metal bellows 101 as a flexible separation element between fluid and gas. The bellows can be used in a very wide temperature range. The metal bellows are welded to the other components and are therefore completely airtight. It is able to move up and down inside the accumulator without any friction or wear and will run for a long time with just one adjustment.

According to some embodiments of the present invention, as shown in Fig. 1-Fig. When the pressure reaches a certain threshold, the pressure relief valve 31 is opened for pressure relief, so as to protect 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 in the prior art, and will not be described in detail here.

In some embodiments of the present invention, as shown in FIGS. 1-11 , each of the first branch to the fourth branch is provided with an opening regulating valve 80 for adjusting its flow rate. That is to say, the opening regulating valve 80 can adjust the oil flow of the corresponding branch, so the damping of the corresponding branch can be adjusted, and the purpose of adjusting the damping of the hydraulic suspension system 1000 can be realized, so that the hydraulic suspension can be adjusted according to the actual situation. The damping of the system 1000, for example, can be adjusted according to road conditions, etc., to ensure that the damping of the hydraulic suspension system 1000 can meet the vibration reduction requirements, effectively solving the contradiction between vehicle comfort and handling stability. In some examples of the present invention, the opening regulating 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 realize the adjustment of the flow rate. the goal of.

In some embodiments of the present invention, a damping adjustment branch is provided between the central control cylinder 21 and the lower chamber 2012, an opening adjustment valve 80 is provided on the damping adjustment branch, and the hydraulic suspension system 1000 also includes a damping adjustment energy storage The damping adjustment accumulator 9 communicates with the damping adjustment branch. Specifically, each group of shock absorber assemblies 2 is correspondingly provided with a damping adjustment accumulator 9 , and the opening adjustment valve 80 is located between the damping adjustment accumulator 9 and the lower chamber 2012 . That is to say, the damping adjustment accumulator 9 can store energy. When the opening of the opening adjustment valve 80 is reduced so that the amount of oil that can flow through the branch is reduced, the oil in the shock absorber flows to the damping adjustment branch. The channel of the shock absorber becomes narrower and the damping of the shock absorber becomes larger. When the opening of the opening regulating valve 80 increases, the passage to the damping regulating branch in the shock absorber becomes wider at this time, and the damping of the shock absorber becomes smaller, so the accumulator 9 and the opening regulating valve are adjusted through the damping The joint cooperation of 80 ensures the reliability of the damping adjustment of the hydraulic suspension system 1000, and ensures that the amount of oil circulating in the branch circuit matches the required damping.

In some embodiments of the present invention, as shown in Fig. 1 and Fig. 3, the accumulator module includes a stiffness adjusting accumulator 10, and each group of shock absorber assemblies 2 is provided with a stiffness adjusting accumulator 10 correspondingly, and the stiffness adjusting The accumulator 10 is connected with the branch circuit, and the oil inlet and outlet of the stiffness adjusting accumulator 10 are provided with a stiffness adjusting valve 11, and the first control valve 3 to the fourth control valve 6 are all located at the corresponding stiffness adjusting accumulator 10 and the accumulator. Between the liquid pot 1. Specifically, when the stiffness adjustment valve 11 is opened and the first control valve 3 to the fourth control valve 6 are all opened, the oil in the liquid storage pot 1 can enter the stiffness adjustment accumulator 10 for energy storage. When the first control valve 3 to the fourth control valve 6 are all closed and the stiffness adjustment valve 11 is opened, the oil in each stiffness adjustment accumulator 10 can be discharged into the through hole 204 in the corresponding shock absorber assembly 2 , so that the piston rod 203 rises. When it is necessary to increase the stiffness, 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 to increase the suspension stiffness.

It can be understood that each stiffness adjustment valve 11 can be adjusted independently, so that the stiffness of the front side and the rear side of the hydraulic suspension system 1000 can be made inconsistent to meet the requirements of different working conditions. For example, in the anti-nodding and anti-rolling conditions of the vehicle, the front axle needs to provide greater stiffness, so the stiffness adjustment valves 11 corresponding to the left front shock absorber assembly 2 and the right front shock absorber assembly 2 can be closed , the stiffness adjustment valve 11 corresponding to the right rear shock absorber assembly 2 and the left rear shock absorber assembly 2 is in an open state.

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 type accumulator. Compared with a metal bellows accumulator, a diaphragm type accumulator has Faster pressure storage capacity and more pressure storage capacity. The diaphragm accumulator can achieve a higher pressure storage capacity in a short time, so the stiffness adjustment accumulator 10 uses the diaphragm accumulator to store the pressure of each suspension so as to realize the lifting of the vehicle body. It should be noted that the energy storage principles of the metal bellows accumulator and the diaphragm accumulator are both prior art, and will not be described in detail here.

In some embodiments of the present invention, as shown in FIG. 1 , a seventh control valve 12 for conducting or blocking it is provided on the branch, and the seventh control valve 12 is located between the stiffness adjustment accumulator 10 and the through hole 204 . Specifically, the hydraulic suspension system 1000 can have a pressurized mode. In the pressurized mode, the first control valve 3 to the fourth control valve 6 are all open, the seventh control valve 12 is closed, and the stiffness adjustment valve 11 is opened. The oil in the pot 1 enters the stiffness adjustment accumulator 10 for energy storage.

When it is necessary to switch to the lifting mode, the first control valve 3 to the fourth control valve 6 are closed, the seventh control valve 12 is opened, and the stiffness adjustment valve 11 is opened, and the oil in the stiffness adjustment accumulator 10 enters the through hole 204 This causes the piston 202 to rise.

When it is necessary to switch to the height reduction mode, the first control valve 6 to the fourth control valve 6 are all opened, the seventh control valve 12 is opened, and the stiffness adjustment valve 11 is closed, and the oil flow discharged from the through hole 204 of the shock absorber 200 Return to the reservoir 1. Therefore, by setting the seventh control valve 12, the stiffness adjustment valve 11 can be stored first, and when lifting or stiffness adjustment is required, it can be realized by opening or closing the stiffness adjustment valve 11, and the response speed is fast and reliable.

Further, the hydraulic suspension system 1000 can also have braking anti-dive and acceleration anti-dive modes, and during the running of the vehicle, it can control the first control valve to the fourth control valve corresponding to each group of shock absorber assemblies 2 One is closed, the seventh control valve 12 is opened and the stiffness adjustment valve 11 is closed, and the through hole 204 of each shock absorber assembly 2 communicates with the damping adjustment accumulator 9, and the damping adjustment accumulator 9 can adjust the corresponding shock absorber Oil quantity within 200. Therefore, the shock absorber 200 corresponding to each group of shock absorber assembly 2 has a reaction force to the movement tendency of the vehicle body at the corresponding position, so that the hydraulic suspension system 1000 has braking anti-nodding and acceleration anti-nodding modes.

As shown in Fig. 2, Fig. 4-Fig. 11, in some embodiments of the present invention, the accumulator module includes a central accumulator 13, and the first control valve 3 to the fourth control valve 6 are respectively connected with the central accumulator 13 connected. 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 open, the oil in the central accumulator 13 can flow into the through hole 204 of each shock absorber assembly 2, so that by setting the central accumulator 13, Pressurization and energy storage can be carried out first to ensure that the oil can reliably flow to each group of shock absorber assemblies 2 , which is convenient for further adjustment of the damping system and stiffness coefficient of the hydraulic suspension system 1000 .

The hydraulic suspension system 1000 according to several specific embodiments of the present invention will be described in detail below with reference to FIGS. Exemplary modifications are made to each embodiment.

Example 1:

As shown in Figure 1, a 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, liquid storage pot 1, control pump 26, oil return valve 27, one-way valve 28, pressure stabilizing accumulator 29, pressure relief valve 31 and opening regulating valve 80, damping regulating accumulator 9, stiffness regulating accumulator Accumulator 10 and decompression accumulator 30.

Both the left front shock absorber assembly 2 and the right front shock absorber assembly 2 include a shock absorber 200 and a shock absorber spring 205 , and the shock absorber 205 is overlaid and 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 absorber spring 205, the shock absorber spring 205 and the shock absorber 200 are arranged side by side, and the left rear shock absorber assembly 2 The two ends of the damping spring 205 are respectively connected with the vehicle body and the vehicle axle. The two ends of the damping spring 205 of the right rear shock absorber assembly 2 are respectively connected with the vehicle body and the vehicle axle. Each shock absorber 200 includes a first cylinder 201, a piston rod 203 and a piston 202, the piston rod 203 is connected with the piston 202, and the piston 202 is movably arranged in the first cylinder 201 to define an upper chamber 2011 and a lower chamber. In the chamber 2012 , a through hole 204 is provided in the piston rod 203 , and the through hole 204 communicates with the lower chamber 2012 .

The through hole 204 of the left front shock absorber assembly 2 is connected with the liquid storage pot 1 through the first branch, and the first control valve 3 is connected in series on the first branch, and the through hole 204 of the right front shock absorber assembly 2 passes through the second branch. The road is connected with the liquid storage pot 1, the second control valve 4 is connected in series on the second branch, the through hole 204 of the left rear shock absorber assembly 2 is connected with the liquid storage pot 1 through the third branch, and the third branch is connected in series The third control valve 5 and the through hole 204 of the right rear shock absorber assembly 2 are connected with the liquid storage pot 1 through the fourth branch, and the fourth control valve 6 is connected in series on the fourth branch.

The hydraulic suspension system 1000 includes a common flow path and four branch flow paths. The common flow path cooperates with the plurality of branch flow paths to define the first branch to the fourth branch path. The four branch flow paths are connected with multiple shock absorbers respectively. The through holes 204 of the assembly 2 are connected. The one-way valve 28 and the oil return valve 27 are respectively connected with the common flow path. The pressure relief valve 31 is connected to the common flow path.

The liquid storage pot 1 has a liquid outlet and a liquid inlet, and the control pump 26 is respectively connected to the liquid outlet and the common flow path to guide the oil in the liquid storage pot 1 from the first branch to the fourth branch. When the oil return valve 27 is opened, oil flows from the public flow path to the liquid inlet. The one-way valve 28 is arranged at the outlet end of the control pump 26 and conducts in one direction. The pressure stabilizing accumulator 29 is arranged at the outlet end of the control pump 26 and 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 .

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

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

Each shock absorber assembly 2 is correspondingly provided with a decompression accumulator 30, and the decompression accumulator 30 corresponding to the left front shock absorber assembly 2 is directly connected with the piston rod 203 to communicate with the corresponding through hole 204, and the right front shock absorber assembly 2 is directly connected to the corresponding through hole 204. The decompression accumulator 30 corresponding to the vibrator assembly 2 is directly connected to the piston rod 203 so as to communicate with the corresponding through hole 204 . The decompression accumulator 30 corresponding to the left rear shock absorber assembly 2 is connected to the corresponding branch flow path, and the decompression accumulator 30 corresponding to the right rear shock absorber assembly 2 is directly connected to the corresponding branch flow path.

Specifically, the hydraulic suspension system 1000 has a boost mode, a lift mode, a height reduction mode, and an anti-pitch mode. In the boost mode, the first control valve 3 to the fourth control valve 6 are all open and the seventh control valve 12 is closed. , the stiffness adjustment valve 11 is opened, and the control pump 26 operates so that the oil in the liquid storage pot 1 flows into the corresponding stiffness adjustment accumulator 10 through the four branch flow paths for energy storage. After each stiffness adjusting accumulator 10 is charged, the stiffness adjusting valve 11 is closed.

In the lifting mode, the oil in the reservoir 1 or the oil in the accumulator can enter the through hole 204 of the left front shock absorber assembly 2, the through hole 204 of the right front shock absorber assembly 2, the left rear shock absorber The through hole 204 of the vibrator assembly 2 and the through hole 204 of the right rear shock absorber assembly 2, the hydraulic oil entering each through hole 204 flows into the lower chamber 2012, so that the lower chamber 2012 The hydraulic pressure increases to make the piston 202 move upward, and 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 right rear shock absorber assembly The piston rod 203 of 2 moves upwards to drive the vehicle body to move upwards, so as to realize the purpose of lifting the vehicle body.

In height lowering mode, the oil can flow from the through hole 204 of the left front shock absorber assembly 2, the through hole 204 of the right front shock absorber assembly 2, the through hole 204 of the left rear shock absorber assembly 2 and the right rear shock absorber The through hole 204 of the shock absorber assembly 2 flows out, and the hydraulic pressure in the lower chamber 2012 of each shock absorber 200 decreases to make the piston 202 move downward, and the downward movement of the piston 202 drives 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 right rear shock absorber The piston rod 203 of the device assembly 2 moves downward to drive the vehicle body to move downward, so as to achieve the purpose of reducing the height of the vehicle body. It can be understood that, in the height lowering mode, the oil discharged from each shock absorber assembly 2 can be directly discharged to the liquid storage pot 1, or can be discharged to the accumulator for energy storage, or simultaneously discharged to the Liquid storage pot 1 and accumulator.

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

If the pressure in the hydraulic suspension system 1000 is still high or the pressure is high during operation after the pressure relief, you can use the pressure relief valve 31 to open for pressure relief, so as to ensure the reliable operation of the entire hydraulic suspension system 1000 .

During the running of the vehicle, if the damping of the hydraulic suspension system 1000 is large, it will make the vehicle body more bumpy and affect the comfort, you can adjust the amount of oil in each branch flow path through the opening adjustment valve 80 to adjust the hydraulic pressure. For the damping of the suspension system 1000, when the opening of the opening adjustment valve 80 is reduced so that the amount of oil that can flow through the branch is reduced, the passage in the shock absorber that flows to the damping adjustment branch is narrowed, and the shock absorber The damping becomes larger. When the opening of the opening adjustment valve 80 increases, the passage in the shock absorber to the damping adjustment branch 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.

When the stiffness of the hydraulic suspension system 1000 is too high to reduce the comfort of the vehicle, the stiffness adjustment valve 11 can be controlled to open, and the oil in the stiffness adjustment accumulator 10 can be added to each branch flow path, thereby reducing the hydraulic suspension. The rigidity of the suspension system 1000 can increase the cushioning effect of the hydraulic suspension system 1000 on bumps.

During the running of the vehicle, if the vehicle is subject to bumps and shocks, the oil in the lower chamber 2012 of each shock absorber assembly 2 can enter the decompression accumulator 30 through the through hole 204 for energy storage. To achieve 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 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 through hole 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 through hole 204, so as to realize rapid pressure relief.

The upper chamber 2011 of the left front shock absorber assembly 2 communicates with the lower chamber 2012 of the left rear shock absorber assembly 2 through the first pipeline, and the lower chamber 2012 of the left front shock absorber assembly 2 passes through the second pipeline It communicates with the upper chamber 2011 of the left rear shock absorber assembly 2 .

The upper chamber 2011 of the right front shock absorber assembly 2 communicates with the lower chamber 2012 of the right rear shock absorber assembly 2 through the third pipeline, and the lower chamber 2012 of the right front shock absorber assembly 2 passes through the fourth pipeline It communicates with the upper chamber 2011 of the right rear shock absorber assembly 2 . The first pipeline communicates with the third pipeline through the first connecting pipeline to form a first loop, and the second pipeline communicates with the fourth pipeline through the second connecting pipeline to form a second loop. The hydraulic suspension system 1000 also includes a first adjusting accumulator 16 and a second adjusting accumulator 17, the first adjusting accumulator 16 is connected to the first circuit, and the oil inlet and outlet of the first adjusting accumulator 16 are provided with The first regulating valve 20. The second regulating accumulator 17 is connected to the second circuit, and the oil inlet and outlet of the second regulating accumulator 17 are provided with a second regulating valve 21 . A first on-off valve 22 is provided on the first connecting pipeline for conducting or blocking it, and a second on-off valve 23 for conducting or blocking it is provided on the second connecting pipeline.

Specifically, when the vehicle has a pitching tendency, that is, one of the front side and the rear side of the hydraulic suspension system 1000 is compressed, such as 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 . The piston rod 203 is compressed, the piston rod 203 of the left rear shock absorber assembly 2 and the piston rod 203 of the right rear shock absorber assembly 2 are stretched, the oil in the lower chamber 2012 of the left front shock absorber assembly 2 The oil flows into the upper chamber 2011 of the left rear shock absorber assembly 2 through the second pipeline, and the oil in the lower chamber 2012 of the right front shock absorber assembly 2 flows into the right rear shock absorber through the fourth pipeline. In the upper chamber 2011 of the shock absorber assembly 2, the piston of the left rear shock absorber assembly and the piston of the right rear shock absorber assembly descend, so that the left rear shock absorber assembly and the right rear shock absorber assembly Both are compressed to make the front and rear consistent, so the hydraulic suspension system 1000 can provide an anti-pitch force to avoid the vehicle from continuing to pitch.

By forming the first loop and the second loop, the linkage adjustment of the right front shock absorber assembly 2, the right rear shock absorber assembly 2, the left front shock absorber assembly 2 and the left rear shock absorber assembly 2 can be realized, further Guaranteed to provide an anti-pitch moment to prevent the vehicle from continuing to pitch. The stiffness of the hydraulic suspension system 1000 can be adjusted by controlling the opening and closing states of the first regulating valve 20 and the second regulating valve 21. For example, when the first regulating valve 20 and the second regulating valve 21 are closed, the hydraulic suspension can be increased. The stiffness of rack system 1000.

When the first on-off valve 22 is closed, the first pipeline and the third pipeline are disconnected, and when the second on-off valve 23 is closed, the second pipeline and the fourth pipeline are disconnected, so that Whether it is necessary to make multiple shock absorber assemblies 2 to be linked is determined according to actual needs.

Of course, it can be understood that the above oil flow path description is only an exemplary description to introduce the anti-pitch principle, when the rear side is compressed and the front side is stretched, using the above-mentioned anti-pitch principle, the hydraulic suspension system 1000 can provide An anti-pitch force.

Example 2:

As shown in Figure 2, compared with Embodiment 1, the hydraulic suspension system 1000 according to the embodiment of the present invention is not provided with a stiffness adjustment accumulator 10, and the hydraulic suspension system 1000 according to the embodiment of the present invention also includes a central accumulator 13. The first height maintaining branch and the second height maintaining branch, the first height maintaining branch is respectively connected with the through hole 204 of the left front shock absorber assembly 2 and the through hole 204 of the right front shock absorber assembly 2 (ie The first height maintaining branch is connected with the first control valve 3 and the second control valve 4 respectively), and the fifth control valve 7 for conducting or blocking it is arranged on the first height maintaining branch.

The second height maintaining branch is connected with the through hole 204 of the left rear shock absorber assembly 2 and the through hole 204 of the right rear shock absorber assembly 2 respectively (that is, the second height maintaining branch is connected with the third control valve 5 and the third control valve 5 respectively. The fourth control valve 6 is connected), and the second height maintaining branch is provided with the sixth control valve 8 for conducting or blocking it.

Specifically, when the fifth control valve 7 is opened, the first height maintaining branch is conducted; when the fifth control valve 7 is closed, the first height maintaining branch is cut off. When the sixth control valve 8 is opened, the second height maintaining branch is conducted; when the sixth control valve 8 is closed, the second height maintaining branch is cut off.

When it is necessary to maintain the height of the vehicle body, the hydraulic suspension system 1000 can be switched into the height maintaining mode, the fifth control valve 7 and the sixth control valve 8 are both opened, the first height maintaining branch circuit and the second height maintaining branch circuit are conducted, The through hole 204 of the left front shock absorber assembly 2 communicates with the through hole 204 of the right front shock absorber assembly 2; the through hole 204 of the left rear shock absorber assembly 2 communicates with the through hole 204 of the right rear shock absorber assembly 2 connected. That is to say, 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 linked state, and the piston rod 203 of the left rear shock absorber assembly 2 and the right rear shock absorber assembly The two piston rods 203 are in a linked state, so that the vehicle body can maintain the current height as much as possible.

In the altitude holding mode, each of the first control valve 3 to the fourth control valve 6 is controlled, and the seventh control valve 12 is kept closed.

In this embodiment, in the boost mode, each of the first control valve 3 to the fourth control valve 6 is closed, and the oil in the reservoir 1 is discharged to the central accumulator 13 for energy storage.

Example 3:

As shown in FIG. 3 , in this embodiment, compared with Embodiment 1, the hydraulic suspension system 1000 according to the embodiment of the present invention further includes a central control cylinder 24 .

The central control cylinder 24 includes a second cylinder body 240 and a moving part 241. The moving part 241 is movably arranged in the second cylinder body 240 and cooperates with the second cylinder body 240 to define a first chamber 243, a second chamber 244, the third chamber 245 and the 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 A chamber 243 and a second chamber 244 are distributed on one side of the middle contact portion 2411 of the moving member 241, a third chamber 245 and a fourth chamber 246 are distributed on the other side of the middle contact portion 2411, and the middle contact portion 2411 It cooperates with the movement of the inner wall of the second cylinder body 240 .

The through hole 204 of the left front shock absorber assembly 2 is connected with one of the first chamber 243 and the second chamber 244, and the through hole 204 of the right rear shock absorber assembly 2 is connected with the first chamber 243 and the second chamber 243. The other of the chambers 244 is connected. The through hole 204 of the left rear shock absorber assembly 2 is connected with one of the third chamber 245 and the fourth chamber 246, and the through hole 204 of the right front shock absorber assembly 2 is connected with the third chamber 245 and the fourth chamber 245. The other of the chambers 246 is connected. For the convenience of description below, the through hole 204 of the left front shock absorber assembly 2 is connected with the first chamber 243, the through hole 204 of the right rear shock absorber assembly 2 is connected with the second chamber 244, and the left rear shock absorber assembly 2 is connected with the second chamber 244. The through hole 204 of the assembly 2 is connected to the third chamber 245 , and the through hole 204 of the right front shock absorber assembly 2 is connected to the fourth chamber 246 as an example to describe the principle.

Specifically, when the vehicle has a rolling 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 right front shock absorber assembly 2 and the right rear shock absorber assembly The piston rod 203 formed in 2 is 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 through hole 204, and the lower chamber 2012 of the left rear shock absorber assembly 2 The oil in the chamber 2012 is discharged to the third chamber 245 through the through hole 204. Since the first chamber 243 and the third chamber 245 are located on both sides of the middle contact portion 2411, the oil in the first chamber 243 is relatively The direction of the acting force of the middle contact part 2411 is opposite to the direction of the acting force of the third chamber 245 on the middle contact part 2411, and the two opposite acting forces cancel each other out so that the moving part 241 does not move, so that the left front vibration damping can be suppressed The movement of the piston rod 203 of the shock absorber assembly 2 and the piston rod 203 of the left rear shock absorber assembly 2 can play a role in suppressing roll.

When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is raised so that the compression range of the left front shock absorber assembly 2 is greater than the compression range of the left rear shock absorber assembly 2, from the left front shock absorber assembly 2 The amount of oil discharged 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, so that the moving member 241 moves rightward and squeezes the third chamber. The third chamber 245 and the fourth chamber 246, the oil in the third chamber 245 can be discharged into the lower chamber 2012 of the left rear shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, The oil in the fourth chamber 246 can be discharged into the lower chamber 2012 of the right front shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, thereby reducing the wheel separation between the left rear wheel and the right front wheel. ground risk, increasing vehicle stability.

Of course, it can be understood that the above situations are only exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel is raised, the left rear wheel is raised, etc., the oil will flow according to the above linkage principle to avoid the vehicle from appearing. Roll, here does not describe each working condition in detail.

It can be understood that the hydraulic suspension system 1000 of this embodiment also has the anti-pitch mode described in Embodiment 1, and details will not be repeated here.

Example 4:

As shown in Figures 4-11, in this embodiment, compared with Embodiment 1, the hydraulic suspension system 1000 according to the embodiment of the present invention cancels the stiffness adjustment accumulator 10, and the hydraulic suspension according to the embodiment of the present invention The system 1000 provides a central accumulator 13, a central control cylinder 24, a first altitude maintaining branch and a second altitude maintaining branch.

The oil inlet and outlet of the central accumulator 13 is connected with a central energy storage regulating valve 32, and the central energy storage regulating valve 32 is connected to the public flow path.

The central control cylinder 24 includes a second cylinder body 240 and a moving part 241. The moving part 241 is movably arranged in the second cylinder body 240 and cooperates with the second cylinder body 240 to define a first chamber 243, a second chamber 244, the third chamber 245 and the 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 A chamber 243 and a second chamber 244 are distributed on one side of the middle contact portion 2411 of the moving member 241, a third chamber 245 and a fourth chamber 246 are distributed on the other side of the middle contact portion 2411, and the middle contact portion 2411 It cooperates with the movement of the inner wall of the second cylinder body 240 .

The through hole 204 of the left front shock absorber assembly 2 is connected with one of the first chamber 243 and the second chamber 244, and the through hole 204 of the right rear shock absorber assembly 2 is connected with the first chamber 243 and the second chamber 243. The other of the chambers 244 is connected. The through hole 204 of the left rear shock absorber assembly 2 is connected with one of the third chamber 245 and the fourth chamber 246, and the through hole 204 of the right front shock absorber assembly 2 is connected with the third chamber 245 and the fourth chamber 245. The other of the chambers 246 is connected.

The first height maintaining branch is connected to the through hole 204 of the left front shock absorber assembly 2 and the through hole 204 of the right front shock absorber assembly 2 respectively, the first height maintaining branch is provided with a fifth channel for conducting or blocking it. Control valve 7.

The second height maintaining branch is connected to the through hole 204 of the left rear shock absorber assembly 2 and the through hole 204 of the right rear shock absorber assembly 2 respectively, and the second height maintaining branch is provided with a switch for conducting or blocking it. Sixth control valve 8 .

Specifically, for the convenience of description below, the through hole 204 of the left front shock absorber assembly 2 is connected to the first chamber 243, the through hole 204 of the right rear shock absorber assembly 2 is connected to the second chamber 244, and the left rear shock absorber assembly 2 is connected to the second chamber 244. The through hole 204 of the shock absorber assembly 2 is connected to the third chamber 245 , and the through hole 204 of the right front shock absorber assembly 2 is connected to the fourth chamber 246 as an example to describe the principle.

Specifically, as shown in FIG. 5 , the hydraulic suspension system 1000 enters the pressurized mode, the central accumulator regulating valve 32 is opened and the first control valve 3 to the fourth control valve 6 are closed, the fifth control valve 7 is closed and the sixth control valve is closed. The control valve 8 is closed, and the oil flowing out from the reservoir 1 is discharged to the central accumulator 13 for energy storage.

As shown in FIG. 6 , when the vehicle enters the lifting mode, the central accumulator regulating valve 32 is opened, the first control valve 3 to the fourth control valve 6 are opened, the fifth control valve 7 is closed, and the sixth control valve 8 is closed.

The oil discharged from the central accumulator 13 and/or the oil discharged from the reservoir 1 respectively enters the through holes 204 of the four shock absorber assemblies 2 through the four branch flow paths, and the oil in the through holes 204 Oil enters into the lower chamber 2012 to make the piston rod 203 move up to raise the vehicle body.

As shown in Figure 7, when it is necessary to maintain the height of the vehicle body, the hydraulic suspension system 1000 can be switched into the height maintenance mode, the fifth control valve 7 and the sixth control valve 8 are both open, and the first control valve 3 to the fourth control valve 6 is closed, the first height maintaining branch circuit and the second height maintaining branch circuit are conducting, and the through hole 204 of the left front shock absorber assembly 2 communicates with the through hole 204 of the right front shock absorber assembly 2; the left rear shock absorber assembly The two through holes 204 communicate with the through holes 204 of the right rear shock absorber assembly 2 . That is to say, 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 linked state, and the piston rod 203 of the left rear shock absorber assembly 2 and the right rear shock absorber assembly The two piston rods 203 are in a linked state, so that the vehicle body can maintain the current height as much as possible.

As shown in FIG. 8 , when the vehicle enters the height lowering mode, the central accumulator regulating valve 32 is closed, the first control valve 3 to the fourth control valve 6 are opened, the fifth control valve 7 is closed, and the sixth control valve 8 is closed.

The oil discharged from the lower chamber 2012 of each shock absorber assembly 2 flows back into the liquid storage pot 1 through the branch circuit and the oil return valve 27 , so that each piston rod 203 moves down to lower the vehicle body height.

As shown in FIG. 9 , the central energy storage regulating valve 32 is closed, the first height regulating valve 6 is closed, the second height regulating valve 7 is closed, and the first control valve 3 to the fourth control valve 6 are closed.

When the vehicle has a rolling 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 of the right front shock absorber assembly 2 and the right rear shock absorber assembly 2 The rod 203 is 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 through hole 204, and the oil in the lower chamber 2012 of the left rear shock absorber assembly 2 The oil in the first chamber 243 is discharged to the third chamber 245 through the through hole 204. Since the first chamber 243 and the third chamber 245 are located on both sides of the middle contact part 2411, the oil in the first chamber 243 is on the middle contact part 2411 The direction of the acting force of the third chamber 245 is opposite to the direction of the acting force of the third chamber 245 on the middle contact portion 2411, and the two opposing forces cancel each other so that the moving member 241 does not move, so that the left front shock absorber assembly 2 can be restrained. The movement of 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 can play a role in suppressing roll.

When the left front wheel of the vehicle encounters an obstacle such as a stone, the left front wheel is raised so that the compression range of the left front shock absorber assembly 2 is greater than the compression range of the left rear shock absorber assembly 2, from the left front shock absorber assembly 2 The amount of oil discharged 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, so that the moving member 241 moves rightward and squeezes the third chamber. The third chamber 245 and the fourth chamber 246, the oil in the third chamber 245 can be discharged into the lower chamber 2012 of the left rear shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, The oil in the fourth chamber 246 can be discharged into the lower chamber 2012 of the right front shock absorber assembly 2 so that the piston rod 203 moves up to raise the vehicle body, thereby reducing the wheel separation between the left rear wheel and the right front wheel. ground risk, increasing vehicle stability.

Of course, it can be understood that the above situations are only exemplary descriptions. When the vehicle encounters other working conditions such as the right front wheel is raised, the left rear wheel is raised, etc., the oil will flow according to the above linkage principle to avoid the vehicle from appearing. Roll, here does not describe each working condition in detail.

As shown in Figure 10, the first regulating valve 20 is opened, the second regulating valve 21 is open, the central energy storage regulating valve 32 is closed, the first height regulating valve 6 is closed, the second height regulating valve 7 is closed, the first control valve 3 to The fourth control valve 6 is closed, the first on-off valve 22 is opened and the second on-off valve 23 is opened.

When the vehicle has a tendency to pitch, that is, one of the front and rear sides of the hydraulic suspension system 1000 is compressed, for example, 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 compressed. compression, the oil in the lower chamber 2012 of the left front shock absorber assembly 2 flows into the upper chamber 2011 of the left rear shock absorber assembly 2 through the second pipeline, and the lower chamber of the right front shock absorber assembly 2 The oil in the chamber 2012 flows into the upper chamber 2011 of the right rear shock absorber assembly 2, so that the left rear shock absorber assembly 2 and the right rear shock absorber assembly are compressed, so that the front and rear are consistent, so as to avoid The vehicle continues to pitch.

By forming the first loop and the second loop, the linkage adjustment of the right front shock absorber assembly 2, the right rear shock absorber assembly 2, the left front shock absorber assembly 2 and the left rear shock absorber assembly 2 can be realized, further Guaranteed to provide an anti-pitch moment to prevent the vehicle from continuing to pitch. The stiffness of the hydraulic suspension system 1000 can be adjusted by controlling the opening and closing states of the first regulating valve 20 and the second regulating valve 21, for example, when the first regulating valve 20 and the second regulating valve 21 are closed, the hydraulic suspension can be increased. The stiffness of rack system 1000.

Of course, it can be understood that the above oil flow path description is only an exemplary description to introduce the anti-pitch principle, when the rear side is compressed and the front side is stretched, using the above-mentioned anti-pitch principle, the hydraulic suspension system 1000 can provide An anti-pitch force.

It can be understood that when the hydraulic suspension system 1000 according to the embodiment of the present invention is applied to an off-road vehicle, in order to improve the off-road RTI index, as shown in FIG. The energy storage regulating valve 32 is closed, the first control valve 3 to the fourth control valve 6 are closed, the first on-off valve 22 is closed, and the second on-off valve 23 is closed. The first height adjustment valve 6 is open and the second height adjustment valve 7 is open.

Utilizing the anti-rolling and height-maintaining principles described above, the hydraulic suspension system 1000 can provide anti-rolling force and vehicle height maintaining force when the off-road vehicle passes through a rugged mountain road, so it is not easy to roll.

It should be noted that the above-mentioned four embodiments are only exemplary descriptions, and each embodiment does not exhaustively describe the modes of the hydraulic suspension system 1000. The above-mentioned four embodiments all have a lifting mode, a height The lowering mode, damping adjustment, etc. will not be described in detail in each embodiment here.

The vehicle according to the embodiment of the present invention includes the hydraulic suspension system 1000 according to any one of the above embodiments of the present invention.

According to the vehicle of the embodiment of the present invention, when the vehicle tends to pitch, an anti-pitch force can be provided to prevent the vehicle from continuing to pitch, which can not only enhance the comfort of the vehicle, but also improve the stability and safety of the vehicle.

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

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (14)

1. A hydraulic suspension system, comprising:

The shock absorber comprises a first cylinder body, a piston and a piston rod, wherein the piston is positioned in the first cylinder body to be matched with the first cylinder body to define an upper cavity and a lower cavity, and the piston rod is arranged on the piston and the upper end of the piston rod is suitable for being connected with a vehicle body;

the upper chamber of the left front shock absorber assembly is communicated with the lower chamber of the left rear shock absorber assembly through a first pipeline, and the lower chamber of the left front shock absorber assembly is communicated with the upper chamber of the left rear shock absorber assembly through a second pipeline;

the upper chamber of the right front shock absorber assembly is communicated with the lower chamber of the right rear shock absorber assembly through a third pipeline, and the lower chamber of the right front shock absorber assembly is communicated with the upper chamber of the right rear shock absorber assembly through a fourth pipeline.

2. The hydraulic suspension system of claim 1, wherein the first conduit communicates with the third conduit through a first connecting conduit to form a first circuit and the second conduit communicates with the fourth conduit through a second connecting conduit to form a second circuit.

3. The hydraulic suspension system of claim 2, further comprising a first adjustment accumulator and a second adjustment accumulator, the first adjustment accumulator connected to the first circuit, an oil inlet and outlet of the first adjustment accumulator provided with a first adjustment valve; the second adjusting energy accumulator is connected to the second loop, and an oil inlet and an oil outlet of the second adjusting energy accumulator are provided with second adjusting valves.

4. The hydraulic suspension system according to claim 2, wherein the first connection line is provided with a first on-off valve for turning on or off the first connection line, and the second connection line is provided with a second on-off valve for turning on or off the second connection line.

5. The hydraulic suspension system of claim 1, further comprising: the central control cylinder comprises a second cylinder body and a moving member, the moving member is movably arranged in the second cylinder body and is matched with the second cylinder body to define a first chamber, a second chamber, a third chamber and a fourth chamber, the first chamber, the second chamber, the third chamber and the fourth chamber are sequentially arranged in the moving direction of the moving member, the first chamber and the second chamber are distributed on one side of a middle contact part of the moving member, the third chamber and the fourth chamber are distributed on the other side of the middle contact part, and the middle contact part is in moving fit with the inner wall of the second cylinder body;

The lower chamber of the left front shock absorber assembly is connected to one of the first chamber and the second chamber, and the lower chamber of the right rear shock absorber assembly is connected to the other of the first chamber and the second chamber;

the lower chamber of the left rear shock absorber assembly is connected to one of the third chamber and the fourth chamber, and the lower chamber of the right front shock absorber assembly is connected to the other of the third chamber and the fourth chamber.

6. The hydraulic suspension system according to claim 5 wherein in an initial state, the central control cylinder is symmetrically disposed about the intermediate contact.

7. The hydraulic suspension system of claim 5 wherein a through bore is formed in the piston rod, the through bore extending through the piston rod to communicate the lower chamber with the central control cylinder.

8. The hydraulic suspension system of claim 5 further comprising a fluid supply circuit having a first branch, a second branch, a third branch, and a fourth branch, the first branch, the second branch, the third branch, and the fourth branch being in communication with the first chamber, the fourth chamber, the third chamber, and the second chamber, respectively, the fluid being circulated between the lower chamber of the shock absorber and the fluid supply circuit via the central control cylinder.

9. The hydraulic suspension system of claim 8, wherein the first branch is provided with a first control valve, the second branch is provided with a second control valve, the third branch is provided with a third control valve, and the fourth branch is provided with a fourth control valve.

10. The hydraulic suspension system of claim 8, wherein a fifth control valve is disposed between the first and second branches, and a sixth control valve is disposed between the third and fourth branches.

11. The hydraulic suspension system of claim 8, wherein a damping adjustment branch is provided between the central control cylinder and the lower chamber, the damping adjustment branch being provided with an opening adjustment valve, the hydraulic suspension system further comprising a damping adjustment accumulator in communication with the damping adjustment branch.

12. The hydraulic suspension system of claim 1, wherein each set of damper assemblies includes a damper spring having opposite ends adapted to be coupled to a vehicle body and an axle.

13. The hydraulic suspension system of claim 12 wherein said damper spring housing of said left front damper assembly is secured to said damper and said damper spring housing of said right front damper assembly is secured to said damper, said damper spring of said left rear damper assembly being juxtaposed to said damper, said damper spring of said right rear damper assembly being juxtaposed to said damper.

14. A vehicle comprising a hydraulic suspension system according to any one of claims 1-13.

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