Hydraulic suspension system and vehicle

Abstract

A hydraulic suspension system (100), comprising a single-axle integrated module (110). The single-axle integrated module (110) is adapted to be connected to two shock absorbers (120) located on a front axle or a rear axle of a vehicle (1000). The single-axle integrated module (110) comprises a valve block (10) and two first integrated ports (21). One of the two first integrated ports (21) is adapted to integrally connect the valve block (10) to one single-axle stiffness adjustment assembly (30), and the other one of the two first integrated ports (21) is adapted to integrally connect the valve block (10) to another single-axle stiffness adjustment assembly (30). Further disclosed is a vehicle (1000). The hydraulic suspension system (100) allows a driver to adjust the stiffness or damping of a chassis on the basis of the driver's own driving preference or road conditions.

Description

Hydraulic suspension system and vehicle

[0001] This application claims priority to Chinese patent application No. 202411999407.X, filed on December 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicle technology, and more particularly to a hydraulic suspension system and vehicle. Background Technology

[0003] The suspension system is an important component of the vehicle chassis, used to transmit forces and torques between the vehicle body and the axle. Vibrations from the road surface that are fed back to the axle can be attenuated by the suspension system before being transmitted to the vehicle body, enabling the vehicle to drive smoothly and improving the driver's driving experience. Summary of the Invention

[0004] This disclosure provides a hydraulic suspension system and a vehicle.

[0005] On one hand, a hydraulic suspension system is provided. The hydraulic suspension system includes a single-axle integrated module. The single-axle integrated module is adapted to connect to two shock absorbers located on the front or rear axle of a vehicle. The single-axle integrated module includes a valve block and two first integration ports. One of the two first integration ports is adapted to integrate the valve block with a single-axle stiffness adjustment assembly, and the other is adapted to integrate the valve block with another single-axle stiffness adjustment assembly.

[0006] On the other hand, a vehicle is also provided. This vehicle includes the aforementioned hydraulic suspension system. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 is a structural schematic diagram of the vehicle provided in an embodiment of this disclosure;

[0009] Figure 2 is a schematic diagram of the valve block provided in an embodiment of this disclosure;

[0010] Figure 3 is a schematic diagram of the hydraulic suspension system provided in an embodiment of this disclosure;

[0011] Figure 4 is a schematic diagram of the internal flow channel structure of the valve block provided in an embodiment of this disclosure;

[0012] Figure 5 is a schematic diagram of another flow channel structure inside the valve block provided in an embodiment of this disclosure;

[0013] Figure 6 is another structural schematic diagram of the valve block provided in an embodiment of this disclosure;

[0014] Figure 7 is another schematic diagram of the hydraulic suspension system provided in an embodiment of this disclosure;

[0015] Figure 8 is a schematic diagram of the structure of the filter assembly provided in an embodiment of this disclosure;

[0016] Figure 9 is a schematic diagram of the attitude control module provided in an embodiment of this disclosure;

[0017] Figure 10 is a schematic diagram of the valve block provided in an embodiment of this disclosure;

[0018] Figure 11 is a schematic diagram of the assembly structure of the cover and valve block provided in the embodiment of this disclosure;

[0019] Figure 12 is a schematic diagram of the structure of the cover provided in an embodiment of this disclosure;

[0020] Figure 13 is a schematic diagram of the valve body provided in an embodiment of this disclosure;

[0021] Figure 14 is a schematic diagram showing the positions of the monitoring port and the exhaust port provided in an embodiment of this disclosure;

[0022] Figure 15 is a schematic diagram of the structure of the single-axis integrated module provided in the embodiment of this disclosure;

[0023] Figure 16 is another structural schematic diagram of the single-axis integrated module provided in an embodiment of this disclosure.

[0024] Reference numerals: 1000, Vehicle; 100, Hydraulic suspension system; 110, Single-axle integrated module; 120, Shock absorber; 10, Valve block; 101, First pipeline; 1010, Main pipeline; 1011, First layer pipeline; 10111, First pipeline segment; 10112, Second pipeline segment; 1012, Second layer pipeline; 10121, Third pipeline segment; 10122, Fourth pipeline segment; 10123, Fifth pipeline segment; 1011A, First main pipeline section; 1011a, First main pipeline sub-section; 102, Third pipeline; 1021, Supply pipeline; 1022, Return pipeline; 103, Mounting cavity; 104, Inlet port; 105. 106. Liquid inlet; 1111. Disassembly port; 1112. First end face; 1113. Second end face; 1114. Third end face; 1114. Fourth end face; 1114a. First settling tank; 1114b. Second settling tank; 1114c. Third settling tank; 113. Cover; 114. Positioning cover plate; 115. Monitoring port; 116. Exhaust port; 12. Mounting bracket; 121. First mounting bracket; 122. Second mounting bracket; 13. Elastic element; 21. First integrated port; 211. First port; 212. Second port; 213. Third port; 22. Second integrated port; 221. Fourth port; 222. Fifth port; 23. Third integrated port; 24. Fourth integrated port; 241. Sixth port; 242. Seventh port; 25. Fifth integrated port; 30. Single-axis stiffness adjustment assembly; 31. First accumulator; 32. Second accumulator; 33. Third accumulator; 40. Single-axis damping adjustment assembly; 41. Damping dual valve; 50. First control valve assembly; 51. First control valve structure; 511. First control valve; 512. Second control valve; 52. Second control valve structure; 513. Third control valve; 53. Valve body; 54. Drive component; 540. Coil; 60. Second control valve assembly; 61. Fourth control valve; 62. Fifth control valve; 63. Sixth control valve; 64. Temperature and pressure sensor; 70. Liquid supply system; 71. Liquid storage device; 72. Pressure building device; 721. Motor; 722. Oil pump; 73. Return module; 731. Return valve; 74. Stabilizing accumulator; 80. Filter assembly; 81. Support cylinder; 811. Liquid inlet chamber; 812. Liquid outlet; 82. Filter screen; 83. Separator; 84. Fastening cylinder; 85. Filter element plug; 90. Attitude control module; 91. Second pipeline; 911. First pipeline section; 9111. First pipeline segment; 9112. Second pipeline segment; 912. Second pipeline section; 9121. Third pipeline segment; 9122. Fourth pipeline segment; 93. Base; 200. Vehicle body; 300. Axle; F1. First direction; F2. First direction; F3. First direction. Detailed Implementation

[0025] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0026] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0027] Referring to Figure 1, some embodiments of this disclosure provide a vehicle 1000, which can be a gasoline-powered vehicle, a pure electric vehicle, or a hybrid vehicle. The vehicle 1000 includes a hydraulic suspension system 100, a vehicle body 200, and an axle 300. The hydraulic suspension system 100 connects the vehicle body 200 and the axle 300, and is used to transmit forces and torques between the vehicle body 200 and the axle 300. Vibrations from the road surface fed back to the axle 300 can be attenuated by the hydraulic suspension system 100 before being transmitted to the vehicle body 200, enabling the vehicle 1000 to drive smoothly and improving the driver's driving experience.

[0028] The aforementioned hydraulic suspension system 100 allows the driver to adjust the chassis stiffness or damping according to their driving preferences or road conditions. For example, when the vehicle 1000 is traveling at high speed, the driver can set a higher stiffness or damping to improve the handling of the vehicle 1000 and prevent it from tilting; when the vehicle 1000 is traveling at low speed, the driver can set a lower stiffness or damping to better cushion road bumps and provide better comfort.

[0029] However, due to the large number of components and low integration of the hydraulic suspension system 100, it is not convenient for initial assembly and subsequent maintenance.

[0030] To address this technical problem, some embodiments of this disclosure provide a hydraulic suspension system 100, which includes a valve block 10, a control valve assembly, and a pressure-building device 72, a single-axis stiffness adjustment assembly 30, and a single-axis damping adjustment assembly 40 integrated on the valve block 10. The structure of the hydraulic suspension system 100 provided in some embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0031] Referring to Figures 2 and 3, the hydraulic suspension system 100 provided in some embodiments of this disclosure includes two single-axis integrated modules 110, which are respectively adapted to connect to two shock absorbers 120 located on the front and rear axles of a vehicle 1000. Each single-axis integrated module 110 may include a valve block 10, a first integrated port 21, and a second integrated port 22. The first integrated port 21 is adapted to integrate the valve block 10 with a single-axis stiffness adjustment assembly 30; the second integrated port 22 is adapted to integrate the valve block 10 with a single-axis damping adjustment assembly 40. A first conduit 101 is provided within the valve block 10, which is adapted to connect the single-axis stiffness adjustment assembly 30 and the single-axis damping adjustment assembly 40 to the corresponding shock absorbers 120.

[0032] Understandably, in some embodiments of this disclosure, a first pipeline 101 is provided inside the valve block 10, and a first integrated port 21 and a second integrated port 22 are provided on the outside of the valve block 10, so that the uniaxial stiffness adjustment component 30 and the uniaxial damping adjustment component 40 are both integrated on the valve block 10. The hydraulic oil and other fluid conduction medium in the first pipeline 101 are adjusted by the uniaxial stiffness adjustment component 30 and the uniaxial damping adjustment component 40 to realize the adjustment of the stiffness and damping of the hydraulic suspension system 100. In this way, the various adjustment components in the hydraulic suspension system 100 that are scattered in different positions no longer need to be connected by multiple connecting pipes, so that the integration of the hydraulic suspension system 100 is high, thereby facilitating the initial assembly and subsequent maintenance.

[0033] Furthermore, in traditional hydraulic suspension systems 100, sealing structures are typically required at the connection points of multiple connecting pipes. If these sealing structures fail, oil leakage risks may occur. However, some embodiments of this disclosure integrate the oil passages (i.e., the first pipe 101) within the valve block 10, eliminating the need for sealing structures between the oil passages and thus eliminating the risk of oil leakage. This ensures the operational stability of the hydraulic suspension system 100.

[0034] It should be noted that the connection between the first integrated port 21 and the single-axis stiffness adjustment component 30, or the connection between the second integrated port 22 and the single-axis damping adjustment component 40, can be a threaded connection, a compression fitting connection, or a flange connection, in order to ensure convenient assembly and good sealing.

[0035] In some embodiments, as shown in FIG9, the valve block 10 has a first end face 1111 and a second end face 1112 at opposite ends along a first direction F1 (i.e., left-right direction). One of the two first integration ports 21 is located on the first end face 1111 and the other is located on the second end face 1112, and the two first integration ports 21 are symmetrically arranged. Correspondingly, one of the two second integration ports 22 is adapted to integrate the valve block 10 with a uniaxial damping adjustment assembly 40, and the other is adapted to integrate the valve block 10 with another uniaxial damping adjustment assembly 40.

[0036] Thus, the two uniaxial damping adjustment components 40 are symmetrically arranged on the valve block 10 to adjust the stiffness and damping of the shock absorbers 120 located on the left and right sides of the front or rear axle, respectively.

[0037] Referring to Figures 4 and 15, in some embodiments, the valve block 10 is provided with two first pipelines 101, one of which is adapted to connect a uniaxial stiffness adjustment component 30, a uniaxial damping adjustment component 40, and a corresponding vibration damper 120. The other is adapted to connect another uniaxial stiffness adjustment component 30, another uniaxial damping adjustment component 40, and a corresponding vibration damper 120.

[0038] Thus, the two uniaxial stiffness adjustment components 30 and the two uniaxial damping adjustment components 40 located on both sides of the valve block 10 can be connected to the damper 120 on the corresponding side through the two first pipes 101, so as to provide a basis for the stiffness and damping adjustment of the damper 120.

[0039] In some embodiments, the uniaxial stiffness adjustment assembly 30 includes at least one accumulator, and the first integration port 21 includes at least one port adapted to integrate the valve block 10 with the at least one accumulator.

[0040] In some embodiments, the first control valve assembly 50 includes at least one control valve disposed in the first pipeline 101, the at least one control valve being adapted to control the on / off state of at least one accumulator and a corresponding damper 120.

[0041] Referring to Figures 4 and 15, in some embodiments, the second integration port 22 includes a fourth port 221 and a fifth port 222 disposed on the first pipeline 101, the fourth port 221 and the fifth port 222 being adapted to integrate the valve block 10 with both ends of the uniaxial damping adjustment assembly 40.

[0042] In some embodiments, as shown in FIG3, the uniaxial damping adjustment assembly 40 includes a damping dual valve 41, and a fourth port and a fifth port are adapted to integrate the valve block 10 with the two ends of the damping dual valve 41.

[0043] Thus, when subjected to impacts from road surfaces, the damping at the inlet and outlet of the shock absorber 120 can be set differently, i.e., two different damping forces can be set to adjust the damping force. On the other hand, when subjected to severe impacts from the road surface, the damping dual valve 41 continuously flows in and out of the shock absorber 120. At this time, by setting two damping forces through the damping dual valve 41, two damping forces can be controlled for both the inlet and outlet oil. That is, when oil is entering the system, the damping of the outlet oil can be quickly adjusted; when oil is exiting the system, the damping force of the inlet oil can be quickly set. This allows for faster damping adjustment.

[0044] Referring to Figures 4 and 7, in some embodiments, the single-axis integrated module 110 further includes a first control valve assembly 50 disposed in the first pipeline 101. The first control valve assembly 50 is adapted to control the on / off state of the single-axis stiffness adjustment assembly 30, the single-axis damping adjustment assembly 40, and the corresponding shock absorber 120. It should be noted that the first control valve assembly 50 can be an electromagnetic control valve, which is electrically connected to the vehicle infotainment system. In this way, the driver can control the opening and closing state of the electromagnetic control valve by operating the relevant buttons on the vehicle infotainment system to adjust the stiffness or damping of the hydraulic suspension system 100. Furthermore, when the vehicle 1000 is turning, the vehicle infotainment system can control the electromagnetic control valve to automatically adjust the stiffness or damping of the shock absorbers 120 on both sides of the hydraulic suspension system 100 according to the different force states of the tires on both sides, thereby helping to maintain the stability of the vehicle body 200 and preventing the vehicle 1000 from tilting.

[0045] Referring to Figures 4 and 7, in some embodiments, the first conduit 101 includes a first end and a second end opposite to each other, the second end being adapted to connect to a corresponding vibration damper. The first conduit 101 includes a first layer conduit 1011 and a second layer conduit 1012 stacked along a second direction F2, the first end being connected to the first layer conduit 1011, the second end being connected to the second layer conduit 1012, and one of the fourth port 221 and the fifth port 222 being connected to the first layer conduit 1011 and the other being connected to the second layer conduit 1012.

[0046] In this way, by stacking multiple layers of pipelines, the space inside the valve block 10 is fully utilized, which helps to reduce the volume of the valve block 10, thereby improving the integration of the single-axis integrated module 110.

[0047] In some embodiments, each control valve includes a first valve port and a second valve port, the first valve port of at least one control valve is disposed on the same layer as and connected to the first layer pipeline 1011, and the second valve port of at least one control valve is disposed on the same layer as and connected to the second layer pipeline 1012.

[0048] In some embodiments, as shown in Figures 2 and 3, the uniaxial stiffness adjustment assembly 30 includes a first accumulator 31, a second accumulator 32, and a third accumulator 33. The first integration port 21 includes a first port 211, a second port 212, and a third port 213. The first port 211, the second port 212, and the third port 213 are respectively adapted to integrate the valve block 10 with the first accumulator 31, the second accumulator 32, and the third accumulator 33. Thus, multiple accumulators can be integrated and connected to one side of the valve block through the first integration port 21.

[0049] In some embodiments, as shown in FIG4, the first control valve assembly 50 includes a first control valve 511, a second control valve 512, and a third control valve 513.

[0050] Referring to Figures 4, 7, and 16, in some embodiments, the first-layer pipeline 1011 includes a first pipeline segment 10111 and a second pipeline segment 10112. The second-layer pipeline 1012 includes a third pipeline segment 10121, a fourth pipeline segment 10122, and a fifth pipeline segment 10123. A first end is connected to the first pipeline segment 10111, which is connected to the first valve port of the first control valve 511 and the first valve port of the second control valve 512. The second pipeline segment 10112 is connected to the first valve port and the third port 213 of the third control valve 513. The third pipeline segment 10121 is connected to the second valve port and the first port 211 of the second control valve 512, the fourth pipeline segment 10122 is connected to the second valve port and the second port 212 of the first control valve 511, and the fifth pipeline segment 10123 is connected to the second valve port of the third control valve 513 and the second end of the first pipeline 101. The fourth port 221 is connected to the first position of the fourth pipeline segment 10122. The first position is located between one end of the fourth pipeline segment 10122 that connects to the second valve port of the first control valve 511 and one end of the fourth pipeline segment 10122 that connects to the second port 212. The fifth port 222 is connected to the second position of the second pipeline segment 10112. The second position is located between one end of the second pipeline segment 10112 that connects to the first valve port of the third control valve 513 and one end of the second pipeline segment 10112 that connects to the third port 213.

[0051] Thus, under the control of the first control valve 511, the second control valve 512 and the third control valve 513, the first layer pipeline 1011 and the second layer pipeline 1012 form multiple independent or interconnected pipelines, and the hydraulic oil can flow to the first accumulator 31, the second accumulator 32 and the third accumulator 33 under the guidance of the corresponding pipelines.

[0052] In some embodiments, as shown in FIG4, the first pipeline segment 10111 extends along the first direction F1, and the second pipeline segment 10112, the third pipeline segment 10121, the fourth pipeline segment 10122, and the fifth pipeline segment 10123 each include a first extension segment and a second extension segment connected in sequence. The first extension segment extends along the third direction F3, and the second extension segment extends along the first direction F1. The first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other.

[0053] In this way, the hydraulic oil can be directed to the target accumulator while ensuring that the layout of each pipeline section within the valve block is relatively regular.

[0054] Referring again to Figures 3, 4 and 7, in some embodiments, the first pipeline 101 includes a main pipeline 1010, which includes a first end and a second end opposite to each other. The first end is adapted to connect to the liquid supply system 70, and the second end is adapted to connect to the corresponding shock absorber 120.

[0055] It should be noted that the shock absorber 120 includes a shock absorber housing, a piston, and a piston rod. The shock absorber housing is connected to the axle 300. The piston is slidably disposed within the shock absorber housing, forming a hydraulic oil chamber at the bottom of the housing. One end of the piston rod is connected to the piston, and the other end is connected to the vehicle body 200. The piston rod is designed as a hollow structure to form an oil injection channel inside. The second end of the main pipeline 1010 is connected to the oil injection channel of the piston rod. When the main pipeline 1010 injects oil into the hydraulic oil chamber, causing the pressure in the lower hydraulic oil chamber to be greater than the pressure caused by the weight of the vehicle body 200, the height of the hydraulic suspension system 100 increases. When the main pipeline 1010 stops injecting oil into the hydraulic oil chamber, causing the pressure in the lower hydraulic oil chamber to be less than the pressure caused by the weight of the vehicle body 200, the height of the hydraulic suspension system 100 decreases.

[0056] Thus, the hydraulic oil supplied by the fluid supply system 70 flows in the main pipeline 1010 and, under the action of the first control valve assembly 50, selectively flows into at least one of the single-axis stiffness adjustment assembly 30 or the single-axis damping adjustment assembly 40 to regulate the pressure or flow rate of the hydraulic oil. The regulated hydraulic oil then enters the hydraulic oil chamber of the shock absorber 120 through the main pipeline 1010 and the oil injection channel, thereby changing the stiffness and damping force of the shock absorber 120.

[0057] Referring again to Figures 4 and 7, in some embodiments, the uniaxial stiffness adjustment assembly 30 includes a first accumulator 31. The first integration port 21 includes a first port 211 connected to the main pipeline 1010, the first port 211 being adapted to integrate the valve block 10 with the first accumulator 31.

[0058] It should be noted that the first accumulator 31 can be a rigid accumulator, and its type can be a diaphragm accumulator, a bellows accumulator, a piston accumulator or other types of accumulator.

[0059] Thus, the first accumulator 31 is integrated onto the valve block 10 via the first port 211, and the energy storage oil chamber in the first accumulator 31 and the hydraulic oil chamber in the shock absorber 120 can be connected via the main pipeline 1010. When the oil in the shock absorber 120 enters the first accumulator 31, the first accumulator 31 stores energy, the hydraulic pressure in the hydraulic suspension system 100 is low, and the compressibility of the oil circuit is high, resulting in lower stiffness of the hydraulic suspension system 100; conversely, when the oil in the first accumulator 31 enters the shock absorber 120, the first accumulator 31 releases oil pressure to replenish the main pipeline 1010 and the shock absorber 120, the hydraulic pressure in the main pipeline 1010 is high, and the compressibility of the oil circuit is low, resulting in higher stiffness of the hydraulic suspension system 100.

[0060] Referring again to Figures 4 and 7, in some embodiments, the section of the main pipeline 1010 located between the first port 211 and the second end is designated as the first main pipeline section 1011A. The first control valve assembly 50 includes a first control valve structure 51, which is disposed between at least one of the first main pipeline section 1011A or the main pipeline 1010 and the first port 211.

[0061] In this way, the oil circuit between the shock absorber 120 and the first accumulator 31 can be controlled by the first control valve structure 51. When the first control valve structure 51 is open, the first accumulator 31 can intervene in the stiffness adjustment of the shock absorber 120; when the first control valve structure 51 is closed, the first accumulator 31 stops adjusting the stiffness of the shock absorber 120.

[0062] Referring again to Figures 4 and 7, in some embodiments, the uniaxial stiffness adjustment assembly 30 further includes a second accumulator 32. The first integration port 21 also includes a second port 212 connected to the main pipeline 1010, the second port 212 being adapted to integrate the valve block 10 with the second accumulator 32.

[0063] It should be noted that the second accumulator 32 can be a damping accumulator. The second accumulator 32 is integrated into the valve block 10 through the second port 212. The energy storage chamber in the second accumulator 32 and the hydraulic oil chamber in the shock absorber 120 can be connected through the main pipeline 1010. Understandably, the more accumulators involved in the main pipeline 1010, the more energy storage chambers connected to the hydraulic oil chamber of the shock absorber 120, the lower the hydraulic pressure in the main pipeline 1010, the greater the compressibility of the oil circuit, and the lower the stiffness of the hydraulic suspension system 100. Thus, the second accumulator 32 can cooperate with the first accumulator 31 to form different stiffness levels, jointly adjusting the stiffness of the hydraulic suspension system 100.

[0064] Referring again to Figures 4 and 7, in some embodiments, the section of the first main pipeline section 1011A located between the second port 212 and the second end is designated as the first main pipeline sub-section 1011a. The first control valve assembly 50 further includes a second control valve structure 52, which is disposed between at least one of the first main pipeline sub-section 1011a or the main pipeline 1010 and the second port 212.

[0065] In this way, the oil circuit between the shock absorber 120 and the second accumulator 32 can be controlled by the second control valve structure 52. When the second control valve structure 52 is open, the second accumulator 32 can intervene in the stiffness adjustment of the shock absorber 120; when the second control valve structure 52 is closed, the second accumulator 32 stops adjusting the stiffness of the shock absorber 120.

[0066] Referring again to Figures 4 and 7, in some embodiments, the first control valve structure 51 includes a first control valve 511 and a second control valve 512. The first control valve 511 is located in the first main pipeline section 1011A and between the first port 211 and the second port 212. The second control valve 512 is located between the main pipeline 1010 and the first port 211.

[0067] Understandably, some embodiments of this disclosure have a normal lifting mode and a rapid lifting mode: In the normal lifting mode, when both the first control valve 511 and the second control valve 512 are open, some hydraulic oil is diverted to the storage chamber of the first accumulator 31 as the hydraulic oil flows through the main pipeline 1010 to the hydraulic oil chamber of the shock absorber 120. This reduces the flow rate of hydraulic oil into the shock absorber 120, requiring a longer time to adjust the hydraulic suspension system 100 to the preset height. In the rapid lifting mode, when the first control valve 511 is open and the second control valve 512 is closed, [the hydraulic oil flow rate is reduced]. The hydraulic oil flowing into the shock absorber 120 has a large flow rate, which can adjust the hydraulic suspension system 100 to the preset height in a short time. After the height adjustment is completed, the first control valve 511 is closed and the second control valve 512 is opened, so that the fluid supply system 70 replenishes the first accumulator 31 until the hydraulic pressure in the accumulator oil chamber in the first accumulator 31 is equal to the pressure in the hydraulic oil chamber in the shock absorber 120. Then the first control valve 511 is opened to prevent the hydraulic oil in the shock absorber 120 from flowing back to the first accumulator 31, which would cause the height of the hydraulic suspension system 100 to decrease after the adjustment is completed.

[0068] Referring again to Figure 3, in some embodiments, the second control valve structure 52 includes a third control valve 513, which is located between the main pipeline 1010 and the second port 212. Thus, the opening and closing state of the third control valve 513 can control whether the second accumulator 32 intervenes in the regulation of the hydraulic suspension system 100. Combined with the regulation of the first accumulator 31 by the first control valve 511 and the second control valve 512, various different stiffness levels can be achieved.

[0069] It should be noted that the difference between the second accumulator 32, which acts as a damping accumulator, and the first accumulator 31, which acts as a stiffness accumulator, is that the second accumulator 32 is normally connected to the main oil circuit so that it can absorb the impact pressure and pulsating pressure of the hydraulic oil in the main oil circuit 1010 in real time. The first accumulator 31, on the other hand, is connected to the main oil circuit according to the user's needs.

[0070] Referring again to Figures 4 and 7, in some embodiments, the uniaxial stiffness adjustment assembly 30 further includes a third accumulator 33. The first integration port 21 also includes a third port 213 connected to the main pipeline 1010, the third port 213 being adapted to integrate the valve block 10 with the third accumulator 33.

[0071] It should be noted that the third accumulator 33 is a pressure-reducing accumulator, located on the side of the main pipeline 1010 near the shock absorber 120. Thus, when the amplitude of the piston inside the shock absorber 120 is large, causing the hydraulic oil pressure in the main pipeline 1010 to exceed the preset pressure, hydraulic oil can enter the third accumulator 33 from the main pipeline 1010 to reduce the oil pressure inside the main pipeline 1010, preventing excessive oil pressure from damaging the main pipeline 1010 and the components connected to it.

[0072] It should also be noted that the third control valve 513 can also be positioned in the section of the main pipeline 1010 between the shock absorber 120 and the third accumulator 33. In this case, the third control valve 513 can function as a lock-up valve (see Figure 4) to control the connection or disconnection between the shock absorber 120 and the main oil circuit. When it is necessary to adjust the stiffness or damping of the shock absorber 120, the third control valve 513 can be opened to allow hydraulic oil to flow between the shock absorber 120 and the main oil circuit. When the adjustment is complete and the shock absorber 120 needs to maintain this stable state, the lock-up valve can be closed to cut off the oil connection between the shock absorber 120 and the main oil circuit.

[0073] Referring again to Figures 3 and 4, in some embodiments, the second integration port 22 includes a fourth port 221 and a fifth port 222 located on the main pipeline 1010. The fourth port 221 and the fifth port 222 are adapted to integrate the valve block 10 with both ends of the single-axis damping adjustment assembly 40. That is, the single-axis damping adjustment assembly 40 is connected in series on the main oil line through the fourth port 221 and the fifth port 222 so as to regulate the damping force of the hydraulic suspension system 100 by controlling the flow rate of the hydraulic oil flowing to the shock absorber 120.

[0074] Referring again to Figures 3 and 4, in some embodiments, there are two of each of the first integrated port 21, the second integrated port 22, the first pipeline 101, and the first control valve assembly 50. The two first integrated ports 21 are respectively adapted to integrate and connect the valve block 10 with the two uniaxial stiffness adjustment assemblies 30. The two second integrated ports 22 are respectively adapted to integrate and connect the valve block 10 with the two uniaxial damping adjustment assemblies 40. The two first pipelines 101 are respectively adapted to connect the two uniaxial stiffness adjustment assemblies 30 and the two uniaxial damping adjustment assemblies 40 to the two vibration dampers 120. The two first control valve assemblies 50 are respectively disposed on the two first pipelines 101, and the two first control valve assemblies 50 are adapted to control the on / off states of the two uniaxial stiffness adjustment assemblies 30 and the two uniaxial damping adjustment assemblies 40 to the two vibration dampers 120.

[0075] In this way, some embodiments of the present disclosure integrate two single-axis stiffness adjustment components 30 and two single-axis damping adjustment components 40 onto a single valve block 10. The flow channel structure within the valve block 10 can be symmetrically arranged, allowing some embodiments of the present disclosure to simultaneously regulate the stiffness and damping force of the two shock absorbers 120 located at both ends of the axle 300 through a single-axis integrated module 110, thereby improving the integration of the hydraulic suspension system 100.

[0076] In some embodiments, two first pipes 101 are spaced apart along a first direction F1 and are symmetrically arranged. Thus, the space between the two first pipes 101 can be used to integrate other components in a single-axis integrated valve block.

[0077] In some embodiments, as shown in Figures 4 and 6, one end face of the valve block 10 along the second direction F2 is a third end face 1113, and at least one control valve of the first control valve assembly 50, the fourth port 221, the fifth port 222, the damping double valve 41 connected between the fourth port 221 and the fifth port 222, and the liquid inlet end of the first pipeline 101 are all disposed on the third end face 1113.

[0078] In some embodiments, as shown in FIG4, two first control valve assemblies 50 are spaced apart along a first direction F1 and are symmetrically arranged. Alternatively, two uniaxial damping adjustment assemblies 40 are spaced apart along the first direction F1 and are symmetrically arranged. Alternatively, two first control valve assemblies 50 are spaced apart along the first direction F1 and are symmetrically arranged, and two uniaxial damping adjustment assemblies 40 are spaced apart along the first direction F1 and are symmetrically arranged.

[0079] In this way, the space on the valve block 10 can be used to arrange the parts. The hydraulic oil in the valve block 10 can be easily flowed to the left and right wheels respectively to the opposite sides through the regulation of the symmetrically arranged first control valve assembly 50 and single-axis damping adjustment assembly 40.

[0080] In some embodiments, as shown in FIG4, the first control valve assembly 50 and the uniaxial damping adjustment assembly 40 are arranged along a third direction F3. The third direction F3 is perpendicular to the second direction F2. This makes the layout of the components compact, which helps to reduce the size of the valve block 10.

[0081] In some embodiments, along the first direction F1, the first ends of the two first pipelines 101 are located between the two first control valve assemblies 50, so that the flow state of hydraulic oil in the two first pipelines 101 can be controlled by the two first control valve assemblies 50 respectively.

[0082] In some embodiments, as shown in FIG9, the single-axis integrated module 110 further includes an attitude control module 90 disposed on the third end face 1113. The attitude control module 90 is capable of switching between a first state, a second state, and a third state. When the attitude control module 90 is in the first state, it controls the supply of liquid to one of the two first pipes 101. When the attitude control module 90 is in the second state, it controls the supply of liquid to the other of the two first pipes 101. When the attitude control module 90 is in the third state, it controls the supply of liquid to both first pipes 101.

[0083] In some embodiments, the attitude control module 90 includes a base 93, a second pipeline 91, and a second control valve assembly 60. The second pipeline 91 is disposed within the base 93 and has a third end and two fourth ends. The two fourth ends of the second pipeline 91 are respectively opposite to and connected to the first ends of two first pipelines 101. The second control valve assembly 60 is disposed in the second pipeline 91 and is used to control the connection and disconnection between the third end and the two fourth ends of the second pipeline 91, so that the attitude control module 90 switches between a first state, a second state, and a third state.

[0084] In other words, the attitude control module 90 in some embodiments of this disclosure can selectively connect or disconnect the second pipe 91 from the two first pipes 101 respectively. When the second pipe 91 is connected to the first pipe 101, the reservoir 71 can supply oil to the shock absorber 120 through the second pipe 91 and the first pipe 101 in sequence, so that the pressure of the hydraulic oil chamber below the shock absorber 120 is greater than the pressure caused by the weight of the vehicle body 200 above the shock absorber 120. The distance between the chassis and the road surface increases, avoiding the scraping of the chassis by protrusions on the road surface, so that the vehicle 1000 can drive smoothly on rough roads. At the same time, the hydraulic oil in the shock absorber 120 can return to the reservoir 71 through the first pipe 101 and the second pipe 91, so that the pressure of the hydraulic oil chamber below the shock absorber 120 is less than the pressure caused by the weight of the vehicle body 200 above the shock absorber 120. The distance between the chassis and the road surface decreases, thereby lowering the center of gravity of the vehicle 1000, which is beneficial for the vehicle 1000 to maintain stability when driving at high speed.

[0085] When the second pipeline 91 is disconnected from the first pipeline 101, the hydraulic oil between the reservoir 71 and the shock absorber 120 is not connected, and the oil pressure in the hydraulic oil chamber of the shock absorber 120 remains relatively stable, so that the body 200 maintains a relatively stable posture.

[0086] In some embodiments, as shown in FIG3, the second conduit 91 includes a first conduit portion 911 and a second conduit portion 912. The first conduit portion 911 is disposed between a third end and a fourth end, and the second conduit portion 912 is disposed between the third end and another fourth end. The second control valve assembly 60 is adapted to implement independent on / off control of the first conduit portion 911 and the second conduit portion 912.

[0087] In some embodiments, as shown in FIG3, the first pipeline section 911 includes a first pipeline segment 9111 and a second pipeline segment 9112, and the second pipeline section 912 includes a third pipeline segment 9121 and a fourth pipeline segment 9122. The first pipeline segment 9111 and the third pipeline segment 9121 are both connected to a third end and belong to the same pipeline segment. The second pipeline segment 9112 is connected between a fourth end and the first pipeline segment 9111, and the fourth pipeline segment 9122 is connected between another fourth end and the second pipeline segment 9112 (or it can be connected to another fourth end of the third pipeline segment 9121). The second control valve assembly 60 includes a fourth control valve 61 and a fifth control valve 62. The fourth control valve 61 is located in the second pipeline segment 9112, and the fifth control valve 62 is located in the fourth pipeline segment 9122.

[0088] In this way, the conduction status of the second pipeline 91 and the two first pipelines 101 can be independently controlled by the fourth control valve 61 and the fifth control valve 62, respectively, so as to avoid the operation status of one first pipeline 101 affecting the operation status of the other first pipeline 101.

[0089] Understandably, the first pipeline section 9111 and the third pipeline section 9121 are combined into the same pipeline section, which can shorten the length of the oil pipeline and reduce the workload in the manufacturing process of the valve block 10. In addition, the fourth control valve 61 located on the second pipeline section 9112 controls the connection or disconnection between the first pipeline 101 and one of the second pipelines 91 by controlling the conduction state of the first pipeline section 911; the fifth control valve located on the fourth pipeline section 9122 controls the connection or disconnection between the first pipeline 101 and another of the second pipelines 91 by controlling the conduction state of the second pipeline section 912.

[0090] Referring to Figures 3 and 9, in some embodiments, the second control valve assembly 60 further includes a sixth control valve 63, which is located in the first pipeline section 9111.

[0091] Understandably, when the vehicle 1000 is in off-road conditions, the piston in the shock absorber 120 has a large amplitude, causing the hydraulic oil to oscillate and impact in the oil circuit. This may cause the fourth control valve 61 or the fifth control valve 62 to open in reverse, and the hydraulic oil enters the reservoir 71, causing the pressure in the hydraulic oil chamber of the shock absorber 120 to drop sharply, which in turn causes the vehicle body 200 to lower its posture, which can easily lead to a safety accident.

[0092] In some embodiments of this disclosure, a sixth control valve 63 is provided in the first pipeline section 9111, so that after the fourth control valve 61 and the fifth control valve 62 are opened in reverse, the hydraulic oil is cut off at the position of the sixth control valve 63 in the first pipeline section 9111, thereby maintaining the stability of the hydraulic oil chamber and oil circuit in the shock absorber 120, and thus maintaining the stability and reliability of the vehicle body 200 attitude.

[0093] Referring to Figures 3 and 5, in some embodiments, the valve block 10 is further provided with a second pipeline 91, which is adapted to supply or return liquid to the two first pipelines 101. For example, the liquid supply system 70 includes a liquid storage device 71, and the second pipeline 91 includes a liquid supply pipeline 1021, which includes a third end and a fourth end opposite to each other. The third end is adapted to connect to the liquid storage device 71, and the fourth end is adapted to connect to the two first pipelines 101.

[0094] In this way, during the fluid supply process, the hydraulic oil in the storage device 71 can enter the first pipeline 101 through the fluid supply pipeline 1021, and then enter the shock absorber 120 through the first pipeline 101; during the fluid return process, the hydraulic oil in the shock absorber 120 can enter the fluid supply pipeline 1021 through the first pipeline 101, and then flow back to the storage device 71 through the fluid supply pipeline 1021.

[0095] It should be noted that if the liquid storage device 71 and the liquid supply line 1021 cannot be directly connected due to structural limitations, a connecting hose can be used to connect the liquid storage device 71 and the liquid supply line 1021, so that the hydraulic oil in the liquid storage device 71 can enter the liquid supply line 1021 through the connecting hose.

[0096] Referring again to Figures 2, 3, and 5, in some embodiments, the fluid supply system 70 further includes a pressure-building device 72, and the single-axis integrated module 110 further includes a third integrated port 23 located in the fluid supply line 1021. The third integrated port 23 is adapted to integrate the valve block 10 with the pressure-building device 72, so that the pressure-building device 72 can also be integrated onto the valve block 10. The pressure-building device 72 may include a motor 721 and an oil pump 722. The motor 721 can drive the oil pump 722 to pump the hydraulic oil in the reservoir 71 into the fluid supply line 1021, providing power for the regulation of the hydraulic suspension system 100.

[0097] Furthermore, since the hydraulic suspension system 100 of some embodiments of this disclosure requires two single-axle integrated modules 110, respectively installed on the front and rear axles of the vehicle 1000, the motor 721 and oil pump 722 in the single-axle integrated module 110 installed on the front axle can supply hydraulic oil to the two front shock absorbers 120, and the motor 721 and oil pump 722 in the single-axle integrated module 110 installed on the rear axle can supply hydraulic oil to the two rear shock absorbers 120. Therefore, compared with the conventional structure in which one motor 721 and one oil pump 722 simultaneously supply hydraulic oil to four shock absorbers 120, the oil pump 722 of the hydraulic suspension system 100 provided in some embodiments of this disclosure can supply hydraulic oil to the shock absorbers 120 more quickly, resulting in a faster lifting speed of the shock absorbers 120 and thus improving the response speed of the hydraulic suspension system 100.

[0098] Referring to Figures 4 and 6, in some embodiments, the single-axis integrated module 110 further includes a fourth integrated port 24 located in the liquid supply line 1021. The fourth integrated port 24 is located between the third end and the third integrated port 23. The fourth integrated port 24 is adapted to integrate the valve block 10 with the return module 73, so that hydraulic oil can enter the liquid storage device 71 through the return module 73 during the return process.

[0099] Referring again to Figure 3, in some embodiments, the fourth integrated port 24 includes an inlet port, a return port, and a common port. The inlet port and the common port are connected to the supply line 1021. The second line 91 also includes a return line 1022, one end of which is connected to the return port, and the other end is adapted to connect to the storage device 71. Thus, during the supply process, the hydraulic oil in the storage device 71 can sequentially enter the supply line 1021 through the inlet port and the common port; during the return process, the hydraulic oil can enter the return line 1022 through the common port and the return port, so as to flow back to the storage device 71 through the return line 1022.

[0100] Referring again to Figures 3 and 4, in some embodiments, the return module 73 may include a return valve 731 to achieve the above-mentioned flow path control, so that the return process of hydraulic oil remains smooth and the oil pump 722 is prevented from being driven in reverse.

[0101] Referring again to Figures 3, 4, and 6, in some embodiments, the single-axis integrated module 110 further includes a fifth integrated port 25, connected to a portion of the fluid supply line 1021 between the common port and the fourth end. The fifth integrated port 25 is adapted to integrate the valve block 10 with the voltage accumulator 74. Understandably, the hydraulic oil may experience pressure pulsations during operation of the oil pump 722, while the voltage accumulator 74 can reduce these pressure pulsations, providing stable oil pressure to the hydraulic suspension system 100.

[0102] Referring to Figures 6 and 7, in some embodiments, the valve block 10 is further provided with a mounting cavity 103, which is located in the portion of the fluid supply line 1021 between the third integrated port 23 and the third end. The single-axis integrated module 110 also includes a filter assembly 80, which is detachably disposed within the mounting cavity 103. Thus, on the one hand, the hydraulic oil can be filtered by the filter assembly 80 before entering the oil pump 722, removing impurities and ensuring stable operation of the oil pump 722. On the other hand, the filter assembly 80 can be easily removed from the valve block 10 for convenient periodic replacement and maintenance.

[0103] Referring again to Figures 6 and 7, in some embodiments, the valve block 10 further includes a liquid inlet hole 104, which is connected to the liquid supply pipeline 1021. As shown in Figure 8, the filter assembly 80 includes a support cylinder 81 and a filter screen 82. The support cylinder 81 has a liquid inlet chamber 811 connected to the pressure building device 72, and the side wall of the support cylinder 81 has at least one liquid outlet hole 812 connected to the liquid inlet chamber 811, and the liquid outlet hole 812 communicates with the liquid inlet hole 104. The filter screen 82 is sleeved on the outer periphery of the support cylinder 81, and the surface area of ​​the filter screen 82 is larger than the surface area of ​​the liquid inlet hole 104.

[0104] Understandably, since the traditional filter screen 82 is located at the inlet hole 104, this leads to two adverse effects: First, the area of ​​the filter screen 82 is limited by the inlet hole 104, and when the cleanliness of the hydraulic oil is poor, the filter screen 82 is easily clogged, which may cause wear and failure of the oil pump 722 and stall and burnout of the motor 721; Second, when the filter screen 82 is clogged, the suspension control pump with reservoir assembly needs to be removed from the vehicle, and the pump inside the assembly needs to be disassembled to clean the filter screen 82, which makes the disassembly process difficult and can easily cause secondary pollution.

[0105] In some embodiments of this disclosure, the pressure building device 72 can first pump the oil in the storage device 71 into the inlet chamber 811 in the support cylinder 81, and then flow out of the support cylinder 81 through the outlet hole 812 on the side wall of the support cylinder 81. Then, the hydraulic oil is filtered by the filter screen 82 located on the outer periphery of the support cylinder 81. The filtered hydraulic oil can enter the supply pipeline 1021 through the inlet hole 104 under the action of the oil pump 722.

[0106] In this way, the surface area of ​​the filter screen 82 is no longer limited by the liquid inlet hole, but can be arranged around the support cylinder 81, maximizing the area of ​​the filter screen 82 per unit space. This improves the filtration efficiency of the hydraulic oil and reduces the probability of clogging of the oil pump 722. Disassembly is also simple; the support cylinder 81 can be pulled out of the mounting cavity 103 of the valve block 10, effectively reducing the workload and facilitating subsequent maintenance by the user.

[0107] Referring again to Figures 7 and 8, in some embodiments, the valve block 10 is further provided with two inlet holes 105. One end of each inlet hole 105 is connected to the pressure building device 72, and the other end is connected to the inlet chamber 811. Along the axial direction of the support cylinder 81, the two inlet holes 105 are located on opposite sides of the outlet hole 812. In this way, hydraulic oil flows into the inlet chamber 811 from both ends of the support cylinder 81 and flows out from the outlet hole 812 located in the middle of the support cylinder 81. This improves the hydraulic oil inlet efficiency and helps maintain the air pressure balance inside and outside the support cylinder 81, ensuring smooth oil venting.

[0108] Referring to Figures 7 and 8, in some embodiments, the filter assembly 80 further includes a separator 83 sleeved on the outer peripheral surface of the support cylinder 81, and the separator 83 is disposed between the liquid inlet 105 and the liquid outlet 812 along the axial direction of the support cylinder 81. For example, the separator 83 includes a first separator 83 and a second separator 83, the first separator 83 being located between the upper liquid inlet 105 and the middle liquid outlet 812, and the second separator 83 being located between the lower liquid inlet 105 and the middle liquid outlet 812.

[0109] Thus, the mounting cavity 103 can be divided into three parts by the separator 83. The portion of the mounting cavity 103 between the upper inlet hole 105 and the first separator 83 is the first part; the portion of the mounting cavity 103 between the lower inlet hole 105 and the second separator 83 is the second part; the hydraulic oil located in the first and second parts is the unfiltered hydraulic oil; and the portion of the mounting cavity 103 between the first and second separators 83 is the third part; the hydraulic oil located in the third part is the filtered hydraulic oil. The first and second separators 83 can separate the unfiltered and filtered hydraulic oil, preventing them from flowing into each other and causing filtration failure.

[0110] Referring again to Figures 7 and 8, in some embodiments, the filter assembly 80 further includes a fastening cylinder 84. The inner wall of the fastening cylinder 84 is fitted around the filter screen 82, and the fastening cylinder 84 is used to apply a clamping force to the filter screen 82 in the direction of the support cylinder 81, so that the filter screen 82 is in close contact with the support cylinder 81. In this way, the impact force exerted on the filter screen 82 when the hydraulic oil flows through the outlet hole 812 can be avoided, which would cause the position of the filter screen 82 to change, thereby ensuring the stability of the filtration effect.

[0111] Referring again to Figures 7 and 8, in some embodiments, the fastening cylinder 84 can move axially along the support cylinder 81, allowing the user to remove and install the filter screen 82 by operating the fastening cylinder 84. When it is necessary to remove the filter screen 82 from the support cylinder 81, the user can drive the fastening cylinder 84 downward along the support cylinder 81, causing the inner wall surface of the fastening cylinder 84 to separate from the outer periphery of the filter screen 82. After the filter screen 82 loses the constraint of the fastening cylinder 84, it can fall off the outer periphery of the support cylinder 81. When it is necessary to install the filter screen 82 on the support cylinder 81, the user can drive the fastening cylinder 84 upward along the support cylinder 81, causing the inner wall surface of the fastening cylinder 84 to contact the outer periphery of the filter screen 82. At this time, the filter screen 82 can be stably connected to the outer periphery of the support cylinder 81 under the constraint of the fastening cylinder 84.

[0112] Referring again to Figures 6 and 7, in some embodiments, the valve block 10 is further provided with a disassembly port 106 communicating with the mounting cavity 103. As shown in Figure 8, the filter assembly 80 also includes a filter element plug 85, which is disposed in the disassembly port 106, and at least a portion of the filter element plug 85 is located in the mounting cavity 103 so that the filter element plug 85 abuts against the fastening cylinder 84.

[0113] Thus, under normal use, the filter plug 85 can stably abut against the fastening cylinder 84, preventing the fastening cylinder 84 from sliding relative to the support cylinder 81 during vibration, which could cause the filter screen 82 to loosen. At the same time, it prevents external debris from entering the hydraulic oil in the mounting cavity 103 through the disassembly port 106. When disassembly is required, the user can pull out the filter plug 85, insert the disassembly sleeve into the mounting cavity 103 through the disassembly port 106, connect the disassembly sleeve to the fastening cylinder 84, and then pull down the disassembly sleeve to separate the fastening cylinder 84 from the filter screen 82, thereby conveniently completing the disassembly process.

[0114] There are several ways to connect the disassembly sleeve and the fastening sleeve 84. For example, at least a portion of the outer circumferential surface of the fastening sleeve 84 may be provided with external threads, and the inner circumferential surface of the disassembly sleeve may have internal threads. The user can rotate the disassembly sleeve to make the internal threads of the disassembly sleeve engage with the external threads of the fastening sleeve 84, thereby achieving a stable connection between the disassembly sleeve and the fastening sleeve 84. Alternatively, a connecting groove can be provided on the outer circumferential surface of the fastening sleeve 84, and a hook can be provided on the disassembly sleeve. The stable connection between the disassembly sleeve and the fastening sleeve 84 can be achieved through the engagement of the hook and the groove.

[0115] Referring to Figures 9 and 10, in some embodiments, the fourth end face 1114 is provided with a first sink 1114a and a second sink 1114b, the first control valve assembly 50 is disposed in the first sink 1114a, the base 93 is disposed in the second sink 1114b, and the second control valve assembly 60 is disposed on the side of the base opposite to the bottom wall of the second sink 1114b.

[0116] In this way, when the base 93 is embedded in the valve block 10, the first pipe section 9111 of the second pipe 91 is connected to the first pipe 101, the second pipe section 9112 is connected to one of the first pipes 101, and the fourth pipe section 9122 is connected to the other first pipe 101. Thus, by controlling the opening and closing state of the second control valve assembly 60 located in each section of the second pipe 91, the conduction state between the second pipe 91 and the two first pipes 101 can be controlled, thereby enabling overall control of the hydraulic suspension system 100.

[0117] Referring to Figures 3 and 9, in some embodiments, a temperature and pressure sensor 64 located on the second pipeline 91 is also provided on the base 93 to monitor the temperature and pressure of the hydraulic oil in the attitude control module 90 in real time, so as to avoid the valve block 10 structure being damaged due to excessive hydraulic oil pressure, or the hydraulic oil characteristics being affected by abnormal temperature, thereby enhancing the stability of the hydraulic suspension system 100.

[0118] It should be noted that in the assembly process, the fourth control valve 61, the fifth control valve 62, and the temperature and pressure sensor 64 are all riveted structures. In order to facilitate replacement and maintenance, they can be modularly integrated and installed on the base 93.

[0119] It should also be noted that the attitude control module 90 can be positioned with the valve block 10 through the pin hole, which improves the installation position accuracy of the coil 540 (as shown in Figure 12), and is locked onto the valve block 10 with screws.

[0120] In some embodiments, as shown in FIG11, the valve block 10 further includes a cover 113, which is disposed on the fourth end face 1114 and covers the opening of the first sink 1114a and the opening of the second sink 1114b.

[0121] In some embodiments, as shown in Figures 12 and 13, the control valve of the first control valve assembly 50 and the control valve of the second control valve assembly 60 both include a valve body 53 and a drive member 54. The valve body 53 is disposed on the valve block 10 or the base 93, and the drive member 54 is disposed on the cover 113. The drive member 54 is used to control the opening and closing of the valve body 53.

[0122] In some embodiments, the hydraulic suspension system 100 further includes an external connector electrically connected to a circuit board, the external connector being adapted to input or output signals.

[0123] In some embodiments, the single-axis integrated module 110 further includes a positioning cover plate 114, which is disposed between the circuit board and the valve body 53. The positioning cover plate 114 has a plurality of first positioning mounting holes, and a plurality of driving components 54 are respectively installed in the plurality of first positioning mounting holes.

[0124] In some embodiments, a potting cavity is formed between the positioning cover plate 114 and the cover body 113, and the potting cavity is filled with sealant, with the circuit board located inside the potting cavity.

[0125] In some embodiments, the third end face 1113 is further provided with a third recess 1114c. A damping dual valve 41 is disposed within the third recess 1114c, and a cover 113 also covers the opening of the third recess 1114c. A portion of the circuit board is disposed between the damping dual valve 41 and the cover 113, and the damping dual valve 41 is electrically connected to the circuit board. A portion of the positioning cover 114 is located between the damping dual valve 41 and the circuit board, and the positioning cover 114 is further provided with a second positioning mounting hole, in which the end of the damping dual valve 41 facing the circuit board is accommodated.

[0126] In some embodiments, the single-axis integrated module 110 further includes a third integrated port 23, a fourth integrated port 24, and a third conduit 102. The third integrated port 23 is adapted to integrate the valve block 10 with the liquid storage device 71. The fourth integrated port 24 is adapted to integrate the valve block 10 with the pressure building device 72. The third conduit 102 is adapted to connect the liquid storage device 71, the pressure building device 72, and the third end of the second conduit 91.

[0127] In some embodiments, the pressure-building device 72 includes an oil pump 722. The third line 102 includes a liquid supply line, and the fourth integration port 24 includes a sixth port 241 (as shown in FIG. 5) connected to the liquid supply line 1021. The sixth port 241 is adapted to integrate the valve block 10 with the oil pump 722.

[0128] In some embodiments, the pressure building device 72 further includes a voltage accumulator 74, and the fourth integrated port 24 further includes a seventh port 242 connected to the liquid supply line, and the seventh port 242 is adapted to integrate the valve block 10 with the voltage accumulator 74.

[0129] In some embodiments, along the extension direction of the supply line, the seventh port 242 is closer to the third end of the second line 91 than the sixth port 241.

[0130] In some embodiments, the single-axis integrated module 110 further includes a fifth integrated port 25 disposed in the liquid supply line 1021, and the third line 102 further includes a return line 1022. One end of the return line 1021 is connected to the liquid storage device 71, and the other end is connected to the fifth integrated port 25. The fifth integrated port 25 is adapted to integrate the valve block 10 with the return module 73. The return module 73 is adapted to allow liquid in the liquid storage device 71 to flow unidirectionally along the liquid supply line 1021 to the third end of the second line 91, and to allow liquid at the third end of the second line 91 to flow unidirectionally along the liquid supply line 1021 to the return line.

[0131] In some embodiments, the valve block 10 is further provided with a mounting cavity 103 located in the third pipeline 102. The single-axis integrated module 110 also includes a filter assembly 80, which is detachably disposed in the mounting cavity 103.

[0132] In some embodiments, the valve block 10 further includes an inlet port 104 located in the third pipeline 102. The filter assembly 80 includes a support cylinder 81 and a filter screen 82. The support cylinder 81 has an inlet chamber 811 connected to the third pipeline 102, and the side wall of the support cylinder 81 has at least one outlet port 812 connected to the inlet chamber 811, and the outlet port 812 is connected to the inlet port 104. The filter screen 82 is sleeved on the outer periphery of the support cylinder 81, and the surface area of ​​the filter screen 82 is larger than the surface area of ​​the inlet port 104.

[0133] In some embodiments, the valve block 10 is further provided with two liquid inlet holes 105, one end of which is connected to the third pipeline 102 and the other end is connected to the liquid inlet chamber 811. And along the axial direction of the support cylinder 81, the two liquid inlet holes 105 are respectively located on opposite sides of the liquid outlet hole 812.

[0134] In some embodiments, the valve block 10 further includes a fourth end face opposite to the third end face, and the liquid storage device 71 is disposed on the third end face.

[0135] In some embodiments, as shown in FIG16, the single-axis integrated module 110 further includes a mounting bracket 12, which is disposed on the valve block 10 and adapted to be fixed on the vehicle frame.

[0136] Referring to Figure 16, in some embodiments, the mounting bracket 12 includes a first mounting bracket 121 and a second mounting bracket 122 that are arranged opposite to each other and spaced apart. The first mounting bracket 121 and the second mounting bracket 122 form a receiving space, and the liquid storage device 71 is disposed in the receiving space.

[0137] In some embodiments, the single-axis integrated module 110 further includes an elastic element 13, which is elastically supported between the mounting bracket 12 and the valve block 10.

[0138] Referring to Figures 3 and 6, in some embodiments, the single-axis integrated module 110 further includes a liquid storage device 71, which is located on the side facing the third end face 1113 and is fixedly connected to the valve block 10. Integrating the liquid storage device 71 onto the valve block 10 in this way helps to shorten the distance between the liquid storage device 71 and the liquid supply line 1021, thereby improving the response speed of the hydraulic suspension system 100.

[0139] Referring again to Figures 3 and 9, in some embodiments, the valve block 10 also includes a fourth end face 1114 opposite to the third end face 1113. Two first integration ports 21 are arranged opposite to each other on the left and right sides of the fourth end face 1114. Correspondingly, two single-axis damping adjustment components 40 are also symmetrically arranged on the valve block 10, so that the overall oil passage layout inside the valve block 10 is compact and neat.

[0140] Referring to Figures 9 and 10, in some embodiments, the fourth end face 1114 is provided with a first recess 1114a and a second recess 1114b. The first control valve assembly 50 is disposed in the first recess 1114a, the base 93 is disposed in the second recess 1114b, and the second control valve assembly 60 is disposed on the side of the base 93 opposite to the bottom wall of the second recess 1114b. Thus, the first control valve assembly 50 can be stably installed in the valve block 10, and the second control valve assembly 60 can be stably installed in the base 93. After the first and second control valve assemblies 50 and 60 are installed, the fourth end face 1114 can remain relatively flush, which facilitates the installation of other components on the fourth end face 1114.

[0141] Referring to Figures 9, 10, and 11, in some embodiments, the valve block 10 further includes a cover 113, which is disposed on the fourth end face 1114 and covers the openings of the first recess 1114a and the second recess 1114b. Thus, the valve block 10, the base 93, and the cover 113 form a closed installation space, providing a stable operating environment for the first control valve assembly 50 and the second control valve assembly 60, while preventing external debris from entering the hydraulic oil lines within the valve block 10.

[0142] Referring to Figures 9, 12, and 13, in some embodiments, the control valve of the first control valve assembly 50 and the control valve of the second control valve assembly 60 both include a valve body 53 and a drive element 54. The valve body 53 is disposed on the valve block 10 or the base 93, and the drive element 54 is disposed on the cover 113. The drive element 54 is used to control the opening and closing of the valve body 53. It should be noted that the drive element 54 here can be a coil 540. The electromagnetic force generated when the coil 540 is energized can drive the solenoid valve core inside the valve body 53 to move. When the coil 540 is not energized, the solenoid valve core avoids the flow path inside the valve body 53, and the hydraulic oil circuit where the control valve is located can remain unobstructed. When the coil 540 is energized, the solenoid valve core blocks the flow path inside the valve body 53, and the hydraulic oil circuit where the control valve is located can be cut off.

[0143] In some embodiments, the single-axis integrated module 110 further includes a circuit board disposed between the cover 113 and the drive member 54, and the drive members 54 of the control valves in the first control valve assembly 50 and the second control valve assembly 60 are electrically connected to the circuit board.

[0144] Understandably, since the coils 540 of multiple control valves are all integrated in the cover 113, the common pins of multiple coils 540, such as the power supply pins of each coil 540, can be connected in parallel, and the power supply pins at different locations can be uniformly gathered on the connector terminal of the circuit board through internal wiring. In this way, the common pins of multiple coils 540 can be led out at the same position through the connector terminal, which can effectively reduce the number of wire harnesses, wire cores and connectors, thereby facilitating the assembly process.

[0145] Referring again to Figure 12, in some embodiments, the single-axis integrated module 110 further includes a positioning cover plate 114 disposed on the side of the circuit cover plate opposite to the cover body 113. The positioning cover plate 114 is provided with multiple positioning mounting holes, and multiple coils 540 can be respectively installed in the multiple positioning mounting holes. The outer peripheral surface of each coil 540 is in contact with the inner peripheral surface of the positioning mounting hole, effectively controlling the installation accuracy and relative position accuracy of each coil 540. This ensures that after the cover body 113 and the valve block 10 are assembled, the multiple coils 540 in the cover body 113 can be connected and assembled with the multiple solenoid valve cores in the valve block 10, so as to ensure the normal operation of the control valve.

[0146] Furthermore, since the control valve generates heat during operation, the heat accumulates within the coil 540, causing its temperature to rise. Meanwhile, the valve block 10 is cooled by the hydraulic oil inside, resulting in a relatively lower temperature. Therefore, the positioning cover 114 of this disclosure can contact both the valve block 10 and the coil 540, allowing the heat from the high-temperature coil 540 to first migrate to the positioning cover 114, which then transfers the heat to the low-temperature valve block 10. The large contact area between the positioning cover 114 and the valve block 10 effectively improves the heat dissipation of the coil 540.

[0147] In some embodiments, the positioning cover plate 114 is further provided with an injection hole and a vent hole. After the cover body 113, positioning cover plate 114, circuit board, coil 540, and sealing ring are assembled, adhesive can be injected through the injection hole. The adhesive fills the gaps between the parts, while excess gas is discharged through the vent hole. Understandably, because the injection eliminates the gaps between the parts within the cover body 113, the relative positions of the parts can remain stable, preventing damage to the parts due to collisions during vibration.

[0148] Referring to Figure 14, in some embodiments, the valve block 10 is further provided with multiple monitoring ports 115 and vent ports 116. The monitoring ports 115 can be connected to the threaded end of the pressure sensor via internal threads to monitor the pressure of the hydraulic suspension system 100. The vent ports 116 are used to expel air bubbles present in the hydraulic oil, preventing air bubbles from causing vibration and noise in the oil lines during the operation of the hydraulic suspension system 100. In addition, the hydraulic oil can also be discharged through the vent ports 116, making it convenient for users to observe the cleanliness of the hydraulic oil and determine whether the oil needs to be replaced for maintenance.

[0149] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0150] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0151] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0152] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0153] In this disclosure, the terms "exemplarily" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts by way of example.

[0154] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0155] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0156] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A hydraulic suspension system (100) including a single-axle integrated module (110) adapted to connect to two shock absorbers (120) located on the front or rear axle of a vehicle (1000), said single-axle integrated module (110) comprising: Valve block (10); as well as Two first integration ports (21), one of which is adapted to integrate the valve block (10) with a uniaxial stiffness adjustment assembly (30), and the other of which is adapted to integrate the valve block (10) with another uniaxial stiffness adjustment assembly (30).

2. The hydraulic suspension system (100) according to claim 1, wherein, The valve block (10) has a first end face (1111) and a second end face (1112) at opposite ends along the first direction. One of the two first integrated ports (21) is located on the first end face (1111) and the other is located on the second end face (1112), and the two first integrated ports (21) are symmetrically arranged.

3. The hydraulic suspension system (100) according to claim 1 or 2, wherein, The single-axis integrated module (110) also includes: Two second integration ports (22), one of which is adapted to integrate the valve block (10) with a uniaxial damping adjustment assembly (40), and the other of which is adapted to integrate the valve block (10) with another uniaxial damping adjustment assembly (40).

4. The hydraulic suspension system (100) according to claim 3, wherein, The valve block (10) is provided with two first pipelines (101), one of which is adapted to connect the one uniaxial stiffness adjustment component (30), the one uniaxial damping adjustment component (40) to one of the two dampers (120); the other is adapted to connect the other uniaxial stiffness adjustment component (30), the other uniaxial damping adjustment component (40) to the other of the two dampers (120).

5. The hydraulic suspension system (100) according to claim 4, wherein, The single-axis integrated module (110) further includes two first control valve assemblies (50), one of which is located in one of the two first pipelines (101) and is adapted to control the on / off state of the single-axis stiffness adjustment assembly (30) connected to the one first pipeline (101) and the vibration damper (120); the other of which is located in the other of the two first pipelines (101) and is adapted to control the on / off state of the single-axis stiffness adjustment assembly (30) connected to the other first pipeline (101) and the vibration damper (120).

6. The hydraulic suspension system (100) according to claim 5, wherein, The uniaxial stiffness adjustment assembly (30) includes at least one accumulator, and the first integration port (21) includes at least one port adapted to integrate the valve block (10) with the at least one accumulator.

7. The hydraulic suspension system (100) according to claim 6, wherein, The first control valve assembly (50) includes at least one control valve disposed in the first pipeline (101), the at least one control valve being adapted to control the on / off state of the at least one accumulator and the corresponding damper (120) of the two dampers (120).

8. The hydraulic suspension system (100) according to claim 7, wherein, The second integration port (22) includes a fourth port (221) and a fifth port (222) disposed on the first pipeline (101), the fourth port (221) and the fifth port (222) being adapted to integrate the valve block (10) with both ends of the uniaxial damping adjustment assembly (40).

9. The hydraulic suspension system (100) according to claim 8, wherein, The single-axis damping adjustment assembly (40) includes a damping double valve (41), and the fourth port (221) and the fifth port (222) are adapted to integrate the valve block (10) with the two ends of the damping double valve (41).

10. The hydraulic suspension system (100) according to claim 8 or 9, wherein, The first conduit (101) includes a first end and a second end opposite to each other, the second end being adapted to connect to a corresponding shock absorber (120); The first pipeline (101) includes a first layer pipeline (1011) and a second layer pipeline (1012) stacked along the second direction. The first end is connected to the first layer pipeline (1011), the second end is connected to the second layer pipeline (1012), and one of the fourth port (221) and the fifth port (222) is connected to the first layer pipeline (1011) and the other is connected to the second layer pipeline (1012).

11. The hydraulic suspension system (100) according to claim 10, wherein, Each of the at least one control valve includes a first valve port and a second valve port. The first valve port of the at least one control valve is disposed on the same layer as and connected to the first layer pipeline (1011), and the second valve port of the at least one control valve is disposed on the same layer as and connected to the second layer pipeline (1012).

12. The hydraulic suspension system (100) according to claim 10 or 11, wherein, The single-axis stiffness adjustment component (30) includes a first accumulator (31), a second accumulator (32), and a third accumulator (33); the first integrated port (21) includes a first port (211), a second port (212), and a third port (213); The first port (211), the second port (212), and the third port (213) are respectively adapted to integrate the valve block (10) with the first accumulator (31), the second accumulator (32), and the third accumulator (33).

13. The hydraulic suspension system (100) according to claim 12, wherein, The first control valve assembly (50) includes a first control valve (511), a second control valve (512), and a third control valve (513).

14. The hydraulic suspension system (100) according to claim 13, wherein, The first layer of pipeline (1011) includes a first pipeline segment (10111) and a second pipeline segment (10112); the second layer of pipeline (1012) includes a third pipeline segment (10121), a fourth pipeline segment (10122) and a fifth pipeline segment (10123); The first end is connected to the first pipeline segment (10111), and the first pipeline segment (10111) is connected to the first valve port of the first control valve (511) and the first valve port of the second control valve (512); the second pipeline segment (10112) is connected to the first valve port of the third control valve (513) and the third port (213); The third pipeline segment (10121) connects the second valve port of the second control valve (512) and the first port (211), the fourth pipeline segment (10122) connects the second valve port of the first control valve (511) and the second port (212), and the fifth pipeline segment (10123) connects the second valve port of the third control valve (513) and the second end; The fourth port (221) is connected to the first position of the fourth pipeline segment (10122), the first position being located between one end of the fourth pipeline segment (10122) connected to the second valve port of the first control valve (511) and one end of the fourth pipeline segment (10122) connected to the second port (212). The fifth port (222) is connected to the second position of the second pipeline segment (10112), the second position being located between one end of the second pipeline segment (10112) connected to the first valve port of the third control valve (513) and one end of the second pipeline segment (10112) connected to the third port (213).

15. The hydraulic suspension system (100) according to claim 14, wherein, The first pipeline segment (10111) extends along a first direction, and the second pipeline segment (10112), the third pipeline segment (10121), the fourth pipeline segment (10122) and the fifth pipeline segment (10123) each include a first extension segment and a second extension segment connected in sequence, the first extension segment extends along a third direction, and the second extension segment extends along the first direction; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

16. The hydraulic suspension system (100) according to claim 9, wherein, The first pipeline (101) includes a main pipeline (1010), the two opposite ends of the main pipeline (1010) are a first end and a second end, and the second end of the main pipeline (1010) is adapted to connect to the corresponding shock absorber (120).

17. The hydraulic suspension system (100) according to claim 16, wherein, The uniaxial stiffness adjustment assembly (30) includes a first accumulator (31); the first integration port (21) includes a first port (211) connected to the main pipeline (1010), the first port (211) being adapted to integrate the valve block (10) with the first accumulator (31).

18. The hydraulic suspension system (100) according to claim 17, wherein, The section of the main road (1010) located between the first port (211) and the second end of the main road (1010) is the first main road section (1011A); The first control valve assembly (50) includes a first control valve structure (51) disposed between at least one of the first main pipeline section (1011A) or the main pipeline (1010) and the first port (211).

19. The hydraulic suspension system (100) according to claim 18, wherein, The uniaxial stiffness adjustment assembly (30) further includes a second accumulator (32); the first integration port (21) further includes a second port (212) connected to the first main pipeline section (1011A), the second port (212) being adapted to integrate the valve block (10) with the second accumulator (32).

20. The hydraulic suspension system (100) according to claim 19, wherein, The section of the main road (1010) located between the second port (211) and the second end of the main road (1010) is the first main road sub-section (1011a); The uniaxial stiffness adjustment assembly (30) further includes a third accumulator (33); the first integration port (21) further includes a third port (213) connected to the first main pipeline section (1011a), the third port (213) being adapted to integrate the valve block (10) with the third accumulator (33).

21. The hydraulic suspension system (100) according to claim 20, wherein, The first control valve assembly (50) further includes a second control valve structure (52), which is disposed between at least one of the first main pipeline subsection (1011a) or the main pipeline (1010) and the second port (212).

22. The hydraulic suspension system (100) according to claim 21, wherein, The second integration port (22) includes a fourth port (221) and a fifth port (222) located on the main pipeline (1010), the fourth port (221) and the fifth port (222) being adapted to integrate the valve block (10) with both ends of the uniaxial damping adjustment assembly (40).

23. The hydraulic suspension system (100) according to any one of claims 4 to 22, wherein, The two first pipes (101) are spaced apart along the first direction and are arranged symmetrically.

24. The hydraulic suspension system (100) according to claim 9, wherein, The valve block (10) has a third end face (1113) along the second direction. The at least one control valve of the first control valve assembly (50), the fourth port (221), the fifth port (222), the damping double valve (41) connected between the fourth port (221) and the fifth port (222), and the liquid inlet end of the first pipeline (101) are all located on the third end face (1113).

25. The hydraulic suspension system (100) according to any one of claims 3 to 24, satisfying at least one of the following: The two first control valve assemblies (50) are spaced apart along a first direction, and the two first control valve assemblies (50) are symmetrically arranged; or, The two single-axis damping adjustment components (40) are spaced apart along the first direction and are arranged symmetrically.

26. The hydraulic suspension system (100) according to claim 24 or 25, wherein, The first control valve assembly (50) and the single-axis damping adjustment assembly (40) are arranged along a third direction; wherein the third direction is perpendicular to the second direction.

27. The hydraulic suspension system (100) according to claim 25, wherein, Along the first direction, the first ends of the two first pipelines (101) are located between the two first control valve assemblies (50).

28. The hydraulic suspension system (100) according to claim 24, wherein, The single-axis integrated module (110) also includes: An attitude control module (90) is provided on the third end face (1113), and the attitude control module (90) can switch between a first state, a second state and a third state; When the attitude control module (90) is in the first state, the attitude control module (90) is configured to control the supply of liquid to one of the two first pipelines (101); When the attitude control module (90) is in the second state, the attitude control module (90) is configured to control the supply of liquid to the other of the two first pipelines (101); When the attitude control module (90) is in the third state, the attitude control module (90) is configured to control the supply of liquid to the two first pipelines (101).

29. The hydraulic suspension system (100) according to claim 28, wherein, The attitude control module (90) includes: Base (93); A second conduit (91) is disposed within the base (93). The second conduit (91) has a third end and two fourth ends. The two fourth ends of the second conduit (91) are respectively opposite to and connected to the first ends of the two first conduits (101); and A second control valve assembly (60) is disposed in the second pipeline (91). The second control valve assembly (60) is configured to control the opening and closing of the third end of the second pipeline (91) and the two fourth ends of the second pipeline (91) so that the attitude control module (90) switches between the first state, the second state and the third state.

30. The hydraulic suspension system (100) according to claim 29, wherein, The second pipeline (91) includes a first pipeline section (911) and a second pipeline section (912); the first pipeline section (911) is located between the third end and one of the two fourth ends, and the second pipeline section (912) is located between the third end and the other of the two fourth ends; The second control valve assembly (60) is adapted to realize independent on / off control of the first pipeline section (911) and the second pipeline section (912).

31. The hydraulic suspension system (100) according to claim 30, wherein, The first pipeline section (911) includes a first pipeline segment (9111) and a second pipeline segment (9112), and the second pipeline section (912) includes a third pipeline segment (9121) and a fourth pipeline segment (9122); The first pipeline section (9111) and the third pipeline section (9121) are both connected to the third end and are the same pipeline section. The second pipeline section (9112) is connected between the first pipeline section (9111) and one of the fourth ends. The fourth pipeline section (9122) is connected between the third pipeline section (9121) and another of the fourth ends. The second control valve assembly (60) includes a fourth control valve (61) and a fifth control valve (62), wherein the fourth control valve (61) is located in the second pipeline section (9112) and the fifth control valve (62) is located in the fourth pipeline section (9122).

32. The hydraulic suspension system (100) according to claim 31, wherein, The second control valve assembly (60) further includes a sixth control valve (63), which is located in the first pipeline section (9111).

33. The hydraulic suspension system (100) according to any one of claims 29 to 32, wherein, The valve block (10) also includes a fourth end face (1114) opposite to the third end face (1113). The fourth end face (1114) is provided with a first sink groove (1114a) and a second sink groove (1114b). The first control valve assembly (50) is disposed in the first sink groove (1114a), the base (93) is disposed in the second sink groove (1114b), and the second control valve assembly (60) is disposed on the side of the base (93) opposite to the bottom wall of the second sink groove (1114b).

34. The hydraulic suspension system (100) according to claim 33, wherein, The valve block (10) also includes a cover (113), which is located on the fourth end face (1114) and covers the opening of the first sink (1114a) and the opening of the second sink (1114b).

35. The hydraulic suspension system (100) according to claim 34, wherein, The control valve of the first control valve assembly (50) and the control valve of the second control valve assembly (60) both include a valve body (53) and a drive member (54). The valve body (53) is disposed on the valve block (10) or the base (93), and the drive member (54) is disposed on the cover (113). The drive member (54) is configured to control the opening and closing of the valve body (53).

36. The hydraulic suspension system (100) according to claim 35, wherein, The single-axis integrated module (110) also includes a circuit board, which is disposed between the cover (113) and the drive member (54). The drive members (54) of the control valves in the first control valve assembly (50) and the second control valve assembly (60) are electrically connected to the circuit board.

37. The hydraulic suspension system (100) according to claim 36, further comprising: An external connector is electrically connected to the circuit board and is adapted to input or output signals.

38. The hydraulic suspension system (100) according to claim 36 or 37, wherein, The single-axis integrated module (110) also includes a positioning cover plate (114), which is disposed between the circuit board and the valve body (53); The positioning cover plate (114) is provided with a plurality of first positioning mounting holes, and a plurality of drive components (54) in the control valves of the first control valve assembly (50) and the second control valve assembly (60) are respectively installed in the plurality of first positioning mounting holes.

39. The hydraulic suspension system (100) according to claim 38, wherein, The positioning cover plate (114) and the cover body (113) form a potting cavity, and the potting cavity is filled with sealant, and the circuit board is located in the potting cavity.

40. The hydraulic suspension system (100) according to claim 39, wherein, The fourth end face (1114) is also provided with a third settling groove (1114c); The damping double valve (41) is located inside the third sink (1114c), and the cover (113) also covers the opening of the third sink (1114c). A portion of the circuit board is located between the damping double valve (41) and the cover (113), and the damping double valve (41) is electrically connected to the circuit board. A portion of the positioning cover plate (114) is located between the damping double valve (41) and the circuit board. The positioning cover plate (114) is also provided with a second positioning mounting hole, and the end of the damping double valve (41) facing the circuit board is accommodated in the second positioning mounting hole.

41. The hydraulic suspension system (100) according to any one of claims 29 to 40, wherein, The single-axis integrated module (110) also includes: The third integration port (23) is suitable for integrating the valve block (10) with the liquid storage device (71); A fourth integration port (24) is adapted to integrate the valve block (10) with the pressure building device (72); and A third pipeline (102) is adapted to connect the liquid storage device (71), the pressure building device (72) to the third end of the second pipeline (91).

42. The hydraulic suspension system (100) according to claim 41, wherein, The pressure building device (72) includes an oil pump (722); the third pipeline (102) includes a liquid supply pipeline (1021); and the fourth integrated port (24) includes a sixth port (241) connected to the liquid supply pipeline (1021). The sixth port (241) is adapted to integrate the valve block (10) with the oil pump (722).

43. The hydraulic suspension system (100) according to claim 42, wherein, The pressure building device (72) further includes a voltage accumulator (74), and the fourth integrated port (24) further includes a seventh port (242) connected to the liquid supply line (1021), and the seventh port (242) is adapted to integrate the valve block (10) with the voltage accumulator (74).

44. The hydraulic suspension system (100) according to claim 43, wherein, Along the extension direction of the liquid supply line (1021), the seventh port (242) is closer to the third end of the second line (91) than the sixth port (241).

45. The hydraulic suspension system (100) according to any one of claims 42 to 44, wherein, The single-axis integrated module (110) further includes: a fifth integrated port (25) located in the liquid supply pipeline (1021); the third pipeline (102) further includes a return pipeline (1022); one end of the return pipeline (1022) is connected to the liquid storage device (71), and the other end is connected to the fifth integrated port (25); the fifth integrated port (25) is adapted to integrate the valve block (10) with the return module (73). The return module (73) is adapted to allow the liquid in the storage device (71) to flow unidirectionally along the supply line (1021) to the third end of the second line (91), and to allow the liquid at the third end of the second line (91) to flow unidirectionally along the supply line (1021) to the return line (1022).

46. ​​The hydraulic suspension system (100) according to any one of claims 41 to 45, wherein, The valve block (10) is also provided with an installation cavity (103) located in the third pipeline (102); The single-axis integrated module (110) also includes a filter assembly (80), which is detachably disposed within the mounting cavity (103).

47. The hydraulic suspension system (100) according to claim 46, wherein, The valve block (10) further includes: a liquid inlet port (104), the liquid inlet port (104) being located in the third pipeline (102); the filter assembly (80) includes: A support cylinder (81) is provided with an inlet chamber (811) connected to the third pipeline (102), and the side wall of the support cylinder (81) is provided with at least one outlet hole (812) connected to the inlet chamber (811), and the outlet hole (812) communicates with the inlet through hole (104); and A filter screen (82) is fitted around the outer periphery of the support cylinder (81), and the surface area of ​​the filter screen (82) is greater than the surface area of ​​the liquid inlet hole (104).

48. The hydraulic suspension system (100) according to claim 47, wherein, The valve block (10) is also provided with two liquid inlet holes (105), one end of which is connected to the third pipeline (102) and the other end is connected to the liquid inlet chamber (811); and along the axial direction of the support cylinder (81), the two liquid inlet holes (105) are located on opposite sides of the liquid outlet hole (812).

49. The hydraulic suspension system (100) according to claim 48, wherein, The filter assembly (80) further includes a separator (83) sleeved on the outer peripheral surface of the support cylinder (81), and the separator (83) is disposed between the liquid inlet (105) and the liquid outlet (812) along the axial direction of the support cylinder (81).

50. The hydraulic suspension system (100) according to any one of claims 47 to 49, wherein, The filter assembly (80) further includes a fastening cylinder (84), the inner wall of which is fitted around the periphery of the filter screen (82), and the fastening cylinder (84) is configured to apply a clamping force to the filter screen (82) in the direction of the support cylinder (81) so that the filter screen (82) and the support cylinder (81) are in contact.

51. The hydraulic suspension system (100) according to claim 50, wherein, The fastening cylinder (84) is axially movable along the support cylinder (81) so that the filter screen (82) can be removed from the support cylinder (81).

52. The hydraulic suspension system (100) according to claim 50 or 51, wherein, The valve block (10) is also provided with a disassembly port (106) communicating with the mounting cavity (103); the filter assembly (80) also includes a filter element plug (85), the filter element plug (85) is provided in the disassembly port (106), and at least a portion of the filter element plug (85) is located in the mounting cavity (103) so that the filter element plug (85) contacts the fastening cylinder (84).

53. The hydraulic suspension system (100) according to any one of claims 41 to 52, wherein, The valve block (10) also includes a fourth end face (1114) opposite to the third end face (1113), and the liquid storage device (71) is disposed on the fourth end face (1114).

54. The hydraulic suspension system (100) according to claim 53, wherein, The single-axis integrated module (110) also includes a mounting bracket (12), which is disposed on the valve block (10) and is adapted to be fixed on the vehicle frame.

55. The hydraulic suspension system (100) according to claim 54, wherein, The mounting bracket (12) includes a first mounting bracket (121) and a second mounting bracket (122) that are arranged opposite to each other and spaced apart. The first mounting bracket (121) and the second mounting bracket (122) form a receiving space, and the liquid storage device (71) is disposed in the receiving space.

56. The hydraulic suspension system (100) according to claim 55, wherein, The single-axis integrated module (110) also includes an elastic element (13) which is elastically supported between the mounting bracket (12) and the valve block (10).

57. A vehicle (1000) comprising a hydraulic suspension system (100) according to any one of claims 1 to 56.

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