Suspension device and vehicle

Abstract

A suspension device and a vehicle. The suspension device comprises a first suspension assembly and a liquid storage container; the first suspension assembly comprises a first shock absorber and a first adjustment assembly, wherein the first adjustment assembly is configured to adjust at least one of an active force and a damping force of the first shock absorber. The liquid storage container is configured to store a medium, and the liquid storage container is connected to the first adjustment assembly; when the medium in the liquid storage container is replenished into the first suspension assembly, the length of the first shock absorber increases; and when the medium in the first suspension assembly is discharged to the liquid storage container, the length of the first shock absorber decreases.

Description

Suspension system and vehicle

[0001] This application claims priority to Chinese patent application No. 202510123964.3, filed on January 24, 2025, 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 suspension system and a vehicle. Background Technology

[0003] The suspension system is a device connecting the vehicle body and wheels, primarily used to adjust the distance between the body and wheels to reduce body vibration and improve vehicle comfort and handling. Suspension systems can be hydraulic, typically consisting of a hydraulic cylinder and piston that can move relative to each other, and a piston rod connected to the piston. By adjusting the pressure of the hydraulic oil within the cylinder, the piston is driven to move relative to the cylinder, thereby adjusting the distance between the body and wheels. Summary of the Invention

[0004] This disclosure provides a suspension system and a vehicle designed to address the problem of insufficient adjustability in current suspension systems.

[0005] In a first aspect, a suspension device is provided, the suspension device including a reservoir and at least one first suspension assembly, each of the at least one first suspension assembly including a first shock absorber and a first adjustment assembly, the first adjustment assembly being configured to adjust at least one of the main force and damping force of the first shock absorber; the reservoir is configured to store a medium, the reservoir being connected to the first adjustment assembly, the length of the first shock absorber increasing when the medium in the reservoir is replenished into the first suspension assembly; and the length of the first shock absorber decreasing when the medium in the first suspension assembly is discharged into the reservoir.

[0006] The suspension device provided in some embodiments of this disclosure can replenish the first suspension assembly with a medium from the reservoir via a first adjusting component, thereby increasing the amount of medium in the first suspension assembly. This increased medium lengthens the first shock absorber, thus increasing the distance between the vehicle body and the wheels. Conversely, the amount of medium in the first suspension assembly can be reduced by draining it from the reservoir, thereby shortening the length of the first shock absorber and reducing the distance between the vehicle body and the wheels.

[0007] In this way, the suspension device proposed in some embodiments of this disclosure adopts a new suspension height adjustment method, which adjusts the distance between the vehicle body and the wheel by the flow of a medium between the liquid reservoir and the first suspension component, thereby realizing the active adjustment function of the suspension. Its adjustment capability is higher and the response is more timely.

[0008] In some embodiments, the first suspension assembly further includes an attitude control assembly capable of switching between an access state and a closed state; when the attitude control assembly is in the access state, the first suspension assembly is connected to the liquid storage container; when the attitude control assembly is in the closed state, the first suspension assembly is disconnected from the liquid storage container.

[0009] In some embodiments, the first damper includes a pressure cylinder and a pusher that are movable relative to each other, at least a portion of the pusher being located within the pressure cylinder and dividing the pressure cylinder into a first chamber and a second chamber; a first adjustment assembly is connected to the first chamber and the second chamber, respectively.

[0010] In some embodiments, the pusher includes a piston portion and a pusher portion. The piston portion is disposed inside the pressure cylinder and divides the pressure cylinder into a first chamber and a second chamber. One end of the pusher portion is connected to the piston portion, and the other end passes through the first chamber and extends to the outside of the pressure cylinder.

[0011] In some embodiments, the first adjustment assembly includes a first conduit, a second conduit, and a drive member. The first conduit is in communication with a first chamber; the second conduit is in communication with a second chamber; the drive member is connected between the first conduit and the second conduit, and the drive member is configured to replenish the medium in the reservoir into the first suspension assembly.

[0012] In some embodiments, the drive includes: a bidirectional hydraulic pump connected between a first pipeline and a second pipeline; and a bidirectional motor connected to the bidirectional hydraulic pump and configured to drive the bidirectional hydraulic pump to rotate, thereby causing the medium to flow between the first suspension assembly and the reservoir.

[0013] In some embodiments, the attitude control component includes a first switching valve and a second switching valve. The first switching valve is connected to a second port and is in reverse connection with one of a liquid storage container and a second chamber. The second switching valve is connected to a first pipeline and is in reverse connection with one of a second valve port and a first port. When the bidirectional hydraulic pump rotates in a first direction or in a second direction, the first switching valve is connected to the second port and the second chamber, and the second switching valve is connected to the first port and the first pipeline.

[0014] In some embodiments, the first regulating component includes an accumulator connected between a first line and a second line, and the accumulator is configured to stabilize the medium pressure of the first suspension component.

[0015] In some embodiments, the first suspension assembly further includes an attitude control assembly capable of switching between an access state and a closed state; when the attitude control assembly is in the access state, the drive member is in communication with the liquid storage container; when the attitude control assembly is in the closed state, the drive member is disconnected from the liquid storage container.

[0016] In some embodiments, the suspension device further satisfies at least one of the following: when the attitude control component is in the access state, the drive member operates to replenish the medium in the reservoir into the first pipeline, the medium in the first chamber also enters the first pipeline, a portion of the medium in the first pipeline enters the accumulator, and another portion enters the second chamber to push the push member to move away from the second chamber; and when the attitude control component is in the access state, the drive member is in the shutdown state, the medium in the second chamber and the medium in the accumulator enter the first pipeline, a portion of the medium in the first pipeline is discharged to the reservoir after passing through the attitude control component, and another portion enters the first chamber to move the push member toward the second chamber.

[0017] In some embodiments, after the pusher moves away from the second chamber to the first target position, or after the pusher moves toward the second chamber to the second target, the attitude control component switches to the closed state, and the accumulator maintains the medium pressure of the first suspension assembly to keep the position of the pusher.

[0018] In some embodiments, after the pusher moves away from the second chamber to the first target position, or after the pusher moves toward the second chamber to the second target, the drive member is in a stopped state, the attitude control component switches to the closed state, and the accumulator maintains the medium pressure of the first suspension component to keep the position of the pusher.

[0019] In some embodiments, the drive has a first port and a second port, the first port being connected to a first pipeline; the attitude control component includes a first switching valve, the first switching valve being connected to the second port, and the first switching valve being switched to be connected to one of the liquid storage container and the second pipeline.

[0020] In some embodiments, the first switching valve connects the second port to the liquid storage container so that the attitude control component is in the connected state. The drive unit can drive the medium in the liquid storage container to flow through the first switching valve and the drive unit in sequence and then enter the first pipeline. The medium in the first chamber also enters the first pipeline. A portion of the medium in the first pipeline enters the accumulator, and the other portion enters the second chamber through the second pipeline to push the pusher to move away from the second chamber.

[0021] In some embodiments, after the pusher moves away from the second chamber to the first target position, the first switching valve can switch to connect the second port and the second pipeline to keep the attitude control component in a closed state, and the accumulator maintains the pressure of the medium to keep the pusher in the first target position.

[0022] In some embodiments, the attitude control component further includes a reflux valve having a first valve port and a second valve port, the first valve port being connected to a liquid storage container; and the second valve port being connected to the first pipeline.

[0023] In some embodiments, the attitude control component further includes a second switching valve, which is connected to the first pipeline and is switched to be connected to one of the second valve port and the first port.

[0024] In some embodiments, the first switching valve connects the second port to the second pipeline, and the second switching valve connects the first pipeline to the return valve, so that the attitude control component is in the connected state; the drive is in the stopped state; the medium in the second chamber can flow through the second pipeline into the first pipeline, and part of the medium in the first pipeline flows through the second switching valve and the return valve in sequence into the liquid storage container, and the other part enters the first chamber, so that the pusher moves toward the second chamber.

[0025] In some embodiments, when the pusher moves toward the second chamber to the second target position, the first switching valve connects the second port to the second pipeline, and the second switching valve connects the first pipeline to the first port, so that the attitude control component is in the closed state, and the accumulator maintains the pressure of the medium so that the pusher is held in the second target position.

[0026] In some embodiments, the drive has a first port and a second port, the first port being connected to the first pipeline via a third pipe, and the second port being connected to the second pipeline via a fourth pipe; the attitude control component includes a first switching valve, which is connected between the liquid storage container and a first position of the fourth pipeline.

[0027] In some embodiments, the first switching valve is opened to put the attitude control component in the access state, and the drive member can drive the medium in the liquid storage container to flow sequentially through the first switching valve and the drive member into the first pipeline. The medium in the first chamber also enters the first pipeline. A portion of the medium in the first pipeline enters the accumulator, and another portion enters the second chamber through the second pipeline to push the push member to move away from the second chamber.

[0028] In some embodiments, after the pusher moves away from the second chamber to the first target position, the first switching valve closes to put the attitude control assembly in the closed state, and the accumulator maintains the pressure of the medium to keep the pusher in the first target position.

[0029] In some embodiments, the attitude control assembly further includes a second switching valve connected between the liquid storage container and a second position of the third pipeline.

[0030] In some embodiments, the first switching valve is closed and the second switching valve is open, so that the attitude control component is in the access state; the drive is in the stop state, the medium in the second chamber can flow through the second pipeline into the first pipeline, the medium in the accumulator enters the first pipeline, part of the medium in the first pipeline flows through the second switching valve into the liquid storage container, and the other part enters the first chamber, so that the pusher moves toward the second chamber.

[0031] In some embodiments, the attitude control assembly further includes a third check valve connected between the second switching valve and the liquid storage container, the third check valve being configured to allow the medium to flow from the second switching valve to the liquid storage container.

[0032] In some embodiments, the attitude control component further includes a third switching valve connected between the first position and the second pipeline.

[0033] In some embodiments, the first switching valve is open and the third switching valve is closed, so that the attitude control component is in the access state. The drive member can drive the medium in the liquid storage container to flow sequentially through the first switching valve and the drive member into the first pipeline. The medium in the first chamber also enters the first pipeline. A portion of the medium in the first pipeline enters the accumulator, and another portion enters the second chamber through the second pipeline, so as to push the push member to move away from the second chamber.

[0034] In some embodiments, the attitude control component further includes a fourth switching valve connected between the second position and the first port.

[0035] In some embodiments, the first switching valve is closed, the second switching valve is open, and the fourth switching valve is closed, so that the attitude control component is in the access state; the drive is in the stop state, the medium in the second chamber can flow through the second pipeline into the first pipeline, the medium in the accumulator enters the first pipeline, part of the medium in the first pipeline flows through the second switching valve into the liquid storage container, and the other part enters the first chamber, so that the pusher moves toward the second chamber.

[0036] In some embodiments, the attitude control component includes a first switching valve and a second switching valve. The first switching valve is connected to a second port and is in reverse connection with one of a liquid storage container and a second chamber. The second switching valve is connected to a first pipeline and is in reverse connection with one of a second valve port and a first port. When the bidirectional hydraulic pump rotates in a first direction or in a second direction, the first switching valve is connected to the second port and the second chamber, and the second switching valve is connected to the first port and the first pipeline.

[0037] In some embodiments, the suspension device further satisfies at least one of the following: the attitude control component is in the closed state, the bidirectional motor drives the bidirectional hydraulic pump to rotate in a first direction to drive the medium in the second chamber to flow through the bidirectional hydraulic pump and enter the first pipeline, a portion of the medium in the first pipeline enters the first chamber to push the pusher member toward the second chamber, and another portion of the medium in the first pipeline enters the accumulator to balance the medium pressure in the first suspension assembly; and the attitude control component is in the closed state, the bidirectional motor drives the bidirectional hydraulic pump to rotate in a second direction to drive the medium in the first chamber to flow through the bidirectional hydraulic pump and enter the second pipeline, at least a portion of the medium in the second pipeline enters the second chamber to push the pusher member away from the second chamber, and the medium in the accumulator flows through the first pipeline into the bidirectional hydraulic pump to balance the medium pressure in the first suspension assembly.

[0038] In some embodiments, the accumulator is provided with an energy storage chamber and a pressure regulating chamber, the energy storage chamber being connected between the first pipeline and the second pipeline; the pressure regulating chamber is provided with compressed gas, and the compressed gas in the pressure regulating chamber can be mutually compressed with the medium in the energy storage chamber.

[0039] In some embodiments, the suspension device further satisfies at least one of the following: the first conduit includes a first pipe and a first valve assembly, the first valve assembly being connected between the first pipe and the accumulator, and the first chamber and the drive member being in communication with the first pipe; and the second conduit includes a second pipe and a second valve assembly, the second valve assembly being connected between the second pipe and the accumulator, and the second chamber and the drive member being in communication with the second pipe.

[0040] In some embodiments, the first pipeline includes a first pipe and a first valve assembly, and the second pipeline includes a second pipe and a second valve assembly; the first valve assembly includes a first damping valve and a first check valve connected in parallel between the first pipe and the accumulator; the second valve assembly includes a second damping valve and a second check valve connected in parallel between the second pipe and the accumulator.

[0041] In some embodiments, during the process of the pusher being forced to move toward the second chamber, the medium inside the second chamber is squeezed, so that the medium enters the second damping valve through the second pipe. A portion of the medium entering the second damping valve enters the accumulator, and the other portion flows sequentially through the first check valve and the first pipe into the first chamber. During the process of the pusher being forced to move away from the second chamber, the medium inside the first chamber is squeezed, so that the medium enters the first damping valve through the first pipe. The medium entering the first damping valve flows sequentially through the second check valve and the second pipe into the second chamber.

[0042] In some embodiments, the first shock absorber further includes a tower top assembly and a connecting arm, the tower top assembly being connected to a push member and adapted to connect one of a wheel and a vehicle body; the connecting arm being connected to a pressure cylinder and adapted to connect the other of a wheel and a vehicle body.

[0043] In some embodiments, the first damper further includes an elastic element connected between the tower top assembly and the pressure cylinder.

[0044] In a second aspect, a vehicle is provided that includes a suspension system.

[0045] In some embodiments, the vehicle further includes a body and at least one wheel, the at least one wheel being disposed on the underside of the body; the suspension device is connected between the body and the at least one wheel.

[0046] In some embodiments, the at least one wheel includes a plurality of wheels; the at least one first suspension assembly includes a plurality of first suspension assemblies, any one of the plurality of first suspension assemblies being connected between the vehicle body and a corresponding wheel among the plurality of wheels.

[0047] In some embodiments, the vehicle further includes a controller connected to the suspension assembly, and the controller is configured to control the suspension assembly to replenish the first suspension assembly with the medium in the reservoir, or to control the suspension assembly to discharge the medium in the first suspension assembly into the reservoir.

[0048] It should be noted that the technical effects of the second implementation method can be found in the technical effects of the corresponding implementation method in the first aspect, and will not be repeated here. Attached Figure Description

[0049] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 is a structural schematic diagram of a vehicle according to some embodiments;

[0051] Figure 2 is a schematic diagram of the first shock absorber in the suspension system of the vehicle shown in Figure 1.

[0052] Figure 3 is a schematic diagram of a suspension device in the vehicle shown in Figure 1;

[0053] Figure 4 is a schematic diagram of the suspension device shown in Figure 3, in which the first switching valve is connected to the second port and the second pipeline, and the second switching valve is connected to the first pipeline and the return valve.

[0054] Figure 5 is a schematic diagram of the structure of the suspension device shown in Figure 3, in which the first switching valve is connected to the second port and the second pipeline, and the second switching valve is connected to the first pipeline and the first port.

[0055] Figure 6 is a schematic diagram of another structure of the suspension device in the vehicle shown in Figure 1;

[0056] Figure 7 is a structural schematic diagram of the suspension device shown in Figure 6 when the third and fourth switching valves are installed.

[0057] Reference numerals: 1000, vehicle; 100, wheel; 200, body; 300, suspension system; 10, first shock absorber; 20, accumulator; 201, accumulator chamber; 202, pressure regulating chamber; 30, attitude control assembly; 301, drive component; 3011, first port; 3012, second port; 3013, bidirectional hydraulic pump; 3014, bidirectional motor; 302, first switching valve; 303, return valve; 3031, first valve port; 3032, second valve port; 304, second switching valve; 305, first switching valve; 306, second switching valve; 307, third check valve; 308, third switching valve; 309, fourth switching valve; 1, pressure cylinder; 1A, first chamber; 1B, second chamber; 1C, through hole; 2, pusher; 21, piston part; 22, pusher part; 3, connecting arm; 4. Tower top assembly; 41. Mounting base; 42. Buffer bushing; 5. First pipeline; 51. First pipe; 52. First valve assembly; 521. First damping valve; 522. First check valve; 6. Second pipeline; 61. Second pipe; 62. Second valve assembly; 621. Second damping valve; 622. Second check valve; 7. Liquid storage container; 8. Third pipeline; 9. Fourth pipeline. Detailed Implementation

[0058] 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.

[0059] 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.

[0060] 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.

[0061] The suspension system in the relevant technology has insufficient adjustment capability and cannot meet actual needs.

[0062] To address the aforementioned issues, please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 according to some embodiments. This disclosure provides a vehicle 1000 in some embodiments. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, a range-extended electric vehicle, a gasoline vehicle, etc. The vehicle 1000 can also be a sedan, truck, bus, lorry, trailer, etc. This disclosure does not limit the type of vehicle 1000.

[0063] Vehicle 1000 may include wheels 100, body 200 and suspension device 300. Wheels 100 are located on the underside of body 200, and suspension device 300 is connected between body 200 and wheels 100. Suspension device 300 is configured to buffer the impact force transmitted to body 200 from uneven road surfaces to ensure the smoothness of vehicle 1000 and improve driving comfort.

[0064] Please refer to Figures 1 and 2. Figure 2 is a structural schematic diagram of the first shock absorber of the suspension device 300 in the vehicle 1000 shown in Figure 1. The suspension device 300 may include a first suspension assembly. The first suspension assembly is connected between the wheel 100 and the vehicle body 200, and the first suspension assembly is configured to adjust the distance between the wheel 100 and the vehicle body 200.

[0065] In some embodiments, the number of first suspension assemblies can be multiple. The number of wheels 100 can also be multiple. One first suspension assembly is connected between one wheel and the vehicle body.

[0066] In some embodiments, the first suspension assembly includes a first shock absorber 10. The first shock absorber 10 includes a pressure cylinder 1 and a pusher 2 that are movable relative to each other.

[0067] The pusher 2 can be connected to one of the wheel 100 and the body 200, and the pressure cylinder 1 can be connected to the other of the wheel 100 and the body 200. In this way, during the relative movement of the pressure cylinder 1 and the pusher 2, a thrust can be generated on the body 200, causing the body 200 and the wheel 100 to move relative to each other, thereby adjusting the distance between the body 200 and the wheel 100, so as to keep the body 200 stable when the vehicle 1000 is driving on bumpy roads and improve the driving comfort of the vehicle 1000.

[0068] In some examples, pressure cylinder 1 can be directly connected to the other of wheel 100 and body 200. For example, pressure cylinder 1 can be connected to the other of wheel 100 and body 200 by welding, snap-fitting, screwing, or other methods.

[0069] In other examples, the pressure cylinder 1 may also be indirectly connected to the other of the wheel 100 and the body 200. For example, the first shock absorber 10 also includes a connecting arm 3, which is connected to the pressure cylinder 1 and to the other of the wheel 100 and the body 200. In this way, the pressure cylinder 1 is connected to the other of the wheel 100 and the body 200 through the connecting arm 3, which makes the connection between the pressure cylinder 1 and the other of the wheel 100 and the body 200 more convenient.

[0070] In some examples, the pusher 2 can be directly connected to one of the wheel 100 and the body 200. For example, the pusher 2 can be connected to one of the wheel 100 and the body 200 by welding, snap-fitting, screwing, or other methods.

[0071] In other examples, the pusher 2 may also be indirectly connected to one of the wheel 100 and the body 200. For example, the first shock absorber 10 also includes a tower mount assembly 4. The tower mount assembly 4 is connected to the pusher 2 and to one of the wheel 100 and the body 200. Thus, connecting the pusher 2 to one of the wheel 100 and the body 200 via the tower mount assembly 4 makes it easier to connect the pusher 2 to either the wheel 100 or the body 200.

[0072] Some embodiments of this disclosure are illustrated by way of example, with a pressure cylinder 1 connected to a wheel 100 via a connecting arm 3 and a pusher 2 connected to a vehicle body 200 via a tower top assembly 4. This should not be considered a special limitation of this disclosure.

[0073] In some examples, the tower top assembly 4 includes a mounting base 41 and a buffer bushing 42. The mounting base 41 is fixedly connected to the pusher 2 and to the vehicle body 200. The buffer bushing 42 is fixedly connected to the mounting base 41 and surrounds the pusher 2. For example, the buffer bushing 42 abuts against the pusher 2.

[0074] When the pusher 2 and the pressure cylinder 1 move relative to each other to adjust the distance between the body 200 and the wheel 100, the buffer bushing 42 can play a buffering role when the pusher 2 pushes the body 200, so as to make the adjustment of the distance between the body 200 and the wheel 100 more stable.

[0075] In some examples, the material of the cushioning bushing 42 can be rubber, latex, silicone, etc.

[0076] In some embodiments, the first damper 10 further includes an elastic element. The elastic element is connected between the tower top assembly 4 and the pressure cylinder 1. In some examples, the elastic element may be sleeved on the outside of the pressure cylinder 1.

[0077] During the driving of vehicle 1000, the relative movement of pressure cylinder 1 and pusher 2 due to road bumps can adjust the distance between body 200 and wheel 100 to ensure the stability of body 200; elastic element is configured to buffer the force transmission between wheel 100 and body 200.

[0078] In some examples, the elastic element can be a helical spring, an air spring, etc., and the helical spring can be a cylindrical helical spring, which is sleeved around the pressure cylinder 1. In some embodiments, the elastic element can also be a tower spring, a disc spring, etc. Some embodiments of this disclosure are illustrated by way of example using a cylindrical helical spring as the elastic element, which should not be considered as a special limitation of this disclosure.

[0079] In some embodiments, at least a portion of the pusher 2 is located within the pressure cylinder 1, and the pressure cylinder 1 is divided into a first chamber 1A and a second chamber 1B.

[0080] In some examples, the pusher 2 includes a piston portion 21 and a pusher portion 22. The piston portion 21 is disposed inside the pressure cylinder 1 and divides the pressure cylinder 1 into a first chamber 1A and a second chamber 1B. For example, the piston portion 21 is sealed to the inner wall of the pressure cylinder 1, thereby dividing the internal space of the pressure cylinder 1 into the first chamber 1A and the second chamber 1B with the piston portion 21 as the boundary.

[0081] The arrangement direction of the first chamber 1A and the second chamber 1B is consistent with the movement direction of the piston part 21 in the pressure cylinder 1, that is, it can be consistent with the height direction of the vehicle 1000.

[0082] Part of the pusher 22 is located in the first chamber 1A. One end of the pusher 22 is connected to the piston 21, and the other end of the pusher 22 opposite to the first end is located outside the pressure cylinder 1.

[0083] That is, one end of the pusher 22 is connected to the piston 21, and the other end of the pusher 22, opposite to the first chamber 1A, extends through the first chamber 1A and out of the pressure cylinder 1. The other end of the pusher 22 can be connected to the vehicle body 200, for example, the other end of the pusher 22 is connected to the vehicle body 200 through the tower top assembly 4.

[0084] In some examples, the actuating part 22 can be a rod-shaped structure, a plate-shaped structure, etc.

[0085] In some examples, the pressure cylinder 1 is provided with a through hole 1C. The through hole 1C is located on the side of the first chamber 1A opposite to the second chamber 1B and communicates with the first chamber 1A. The pushing part 22 passes through the through hole 1C and is sealed to the wall surface of the through hole 1C.

[0086] In some examples, the first chamber 1A can be filled with a medium to generate a thrust on the pusher 2 through the medium within the first chamber 1A, causing the pusher 2 to move in a direction opposite to the first chamber 1A. The second chamber 1B can also be filled with a medium to generate a thrust on the pusher 2 through the medium within the second chamber 1B, causing the pusher 2 to move in a direction opposite to the second chamber 1B.

[0087] The medium can be a gaseous medium, such as air, nitrogen, helium, etc. The medium can also be a liquid medium, such as hydraulic oil, water, etc.

[0088] Alternatively, the pusher 2 and the pressure cylinder 1 can be moved relative to each other by applying an external force to the pusher 2 or the pressure cylinder 1. For example, when the vehicle 1000 is impacted by the road surface, the wheel 100 generates an impact force on the pressure cylinder 1, thereby pushing the pressure cylinder 1 and the pusher 2 to move relative to each other.

[0089] In some embodiments, please refer to FIG3, which is a structural schematic diagram of the suspension device 300 in the vehicle 1000 shown in FIG1. ​​To facilitate adjustment of the media within the first chamber 1A and the second chamber 1B to move the pusher 2 relative to the pressure cylinder 1, the first suspension assembly further includes a first adjustment assembly. The first adjustment assembly is configured to adjust at least one of the main force and damping force of the first shock absorber 10.

[0090] The suspension device 300 also includes a liquid storage container 7. The liquid storage container 7 is configured to store a medium. The liquid storage container 7 can be an oil tank, an oil can, etc.

[0091] The liquid storage container 7 is connected to the first adjustment component. When the medium in the liquid storage container 7 is replenished into the first suspension component, the length of the first shock absorber 10 increases; when the medium in the first suspension component is discharged into the liquid storage container 7, the length of the first shock absorber 10 decreases.

[0092] It should be noted that the length increase of the first damper 10 refers to the movement of the pusher 2 in the direction away from the second chamber 1B, thereby increasing the overall length of the pressure cylinder 1 and the pusher 2. The length decrease of the first damper 10 refers to the movement of the pusher 2 toward the second chamber 1B, thereby decreasing the overall length of the pressure cylinder 1 and the pusher 2.

[0093] With the above configuration, the medium in the reservoir 7 can be added to the first suspension assembly via the first adjustment component, increasing the amount of medium in the first suspension assembly. This increased medium lengthens the first shock absorber, thereby increasing the distance between the vehicle body 200 and the wheel 100. Conversely, the amount of medium in the first suspension assembly can be reduced by draining it from the reservoir 7, shortening the length of the first shock absorber and thus reducing the distance between the vehicle body 200 and the wheel 100.

[0094] This disclosure provides some embodiments of a suspension device that employs a novel suspension height adjustment method. The distance between the vehicle body and the wheels is adjusted by a medium flowing between a reservoir and a first suspension assembly. Compared to related technologies, the suspension device in some embodiments of this disclosure has higher active adjustment capability and more timely response.

[0095] Understandably, the distance between the vehicle body and the wheels is adjusted by the flow of a medium between the reservoir 7 and the first suspension assembly. When the medium needs to be replaced, it is only necessary to drain the medium into the reservoir 7 and then replace it with a new medium. Similarly, when the first suspension assembly needs to be repaired, it is only necessary to drain the medium into the reservoir 7. This makes it convenient to replace the medium in the first suspension assembly and to repair the first suspension assembly.

[0096] When there are multiple first suspension assemblies, each of the multiple first suspension assemblies can be connected to a single reservoir 7 to replenish the medium to the multiple first suspension assemblies through the single reservoir 7. Alternatively, multiple reservoirs 7 can be provided, with one reservoir 7 corresponding to one first suspension assembly.

[0097] In some embodiments, the vehicle 1000 further includes a controller. The controller is connected to the suspension assembly and is configured to control the suspension assembly to replenish the medium in the reservoir 7 into the first suspension assembly. Alternatively, the controller is configured to control the suspension assembly to discharge the medium in the first suspension assembly into the reservoir 7.

[0098] The controller allows for easy control of the flow of the medium between the first suspension assembly and the reservoir 7, thereby facilitating the adjustment of the length of the first shock absorber 10 and the adjustment of the distance between the vehicle body 200 and the wheel 100.

[0099] In some embodiments, the first adjustment assembly is connected to the first chamber 1A and the second chamber 1B, respectively. This allows the medium to be added to the first suspension assembly when it is being replenished, so that the medium can be added to the second chamber 1B, causing the pusher 2 to move away from the second chamber 1B under the action of the medium, thereby increasing the length of the first shock absorber. When the medium in the first suspension assembly is discharged to the reservoir 7, the medium in the second chamber 1B can also be discharged to the reservoir 7, reducing the thrust of the medium in the second chamber 1B on the pusher 2, thereby shortening the length of the first suspension assembly under the action of the vehicle body.

[0100] In some embodiments, the first adjustment assembly includes a first conduit 5, a second conduit 6, and a drive member 301. The first conduit 5 communicates with a first chamber 1A. The second conduit 6 communicates with a second chamber 1B. The drive member 301 is connected between the first conduit 5 and the second conduit 6, and is configured to replenish the medium in the liquid storage container 7 into the first suspension assembly.

[0101] In some embodiments, the drive unit can be connected to a controller. When it is necessary to replenish the first suspension assembly with medium, the controller can control the drive unit to operate, causing the drive unit to drive the medium in the reservoir 7 into the first suspension assembly. When it is necessary to discharge the medium in the first suspension assembly into the reservoir 7, the controller can control the drive unit to be in a stopped state, so that the medium in the first suspension assembly flows back into the reservoir 7.

[0102] In this way, the medium can be easily flowed between the liquid storage container 7 and the first suspension assembly through the drive component.

[0103] In some embodiments, the suspension device 300 may further include an accumulator 20. The accumulator 20 is connected between the first line 5 and the second line 6, and is configured to stabilize the medium pressure of the first suspension assembly.

[0104] In other words, the accumulator 20 is connected to the first chamber 1A via the first pipe 5 and to the second chamber 1B via the second pipe 6. The accumulator 20 can stabilize the pressure of the medium in the first suspension assembly, thereby making the length adjustment of the first shock absorber more stable.

[0105] In some embodiments, the first suspension assembly further includes an attitude control component 30. The attitude control component 30 is capable of switching between an engaged state and a disengaged state. When the attitude control component 30 is in the engaged state, the drive element 301 is in communication with the liquid storage container 7. When the attitude control component 30 is in the disengaged state, the drive element 301 is disconnected from the liquid storage container 7.

[0106] The attitude control component 30 can be connected to a controller so that the controller can control the attitude control component 30 to switch between an access state and a closed state.

[0107] When the attitude control component 30 is in the connected state, the drive unit 301 is connected to the liquid storage container 7. At this time, the drive unit 301 can be activated to replenish the medium in the liquid storage container 7 into the first pipeline 5. Part of the medium in the first pipeline 5 enters the accumulator 20, and the other part enters the second chamber 1B to push the pusher 2 to move away from the second chamber 1B, thereby raising the pusher to the first target position and increasing the length of the first shock absorber.

[0108] Furthermore, the movement of the pusher 2 away from the second chamber 1B allows the medium in the first chamber 1A to also enter the first pipeline 5, where it merges with the medium replenished into the first pipeline 5 by the liquid storage container 7. Part of the medium enters the accumulator 20, and the other part enters the second chamber 1B.

[0109] Furthermore, to lower the vehicle body height, the attitude control component 30 can be engaged, connecting the drive unit 301 to the liquid storage container 7. At this time, the drive unit 301 is in a stopped state, and the medium in the second chamber 1B and the medium in the accumulator 20 enter the first pipe 5. A portion of the medium in the first pipe 5 is discharged to the liquid storage container 7 after passing through the attitude control component 30. With the reduced medium in the second chamber 1B, the pusher 2 can move towards the second chamber 1B under the action of the vehicle body, lowering the pusher 2 to the second target position and reducing the length of the first shock absorber.

[0110] Furthermore, the movement of the pusher toward the second chamber 1B also allows another part of the medium in the first pipeline 5 to enter the first chamber 1A, generating a thrust on the pusher 2 so that the pusher 2 moves toward the second chamber 1B.

[0111] After the pusher 2 moves away from the second chamber 1B to the first target position, or after the pusher 2 moves towards the second chamber 1B to the second target position, the attitude control component 30 can be switched to a closed state, disconnecting the drive component 301 from the reservoir 7. At this time, the first suspension assembly is disconnected from the reservoir 7, becoming a closed system. Thus, the medium within the first suspension assembly can maintain the pusher at the first or second target position, thereby maintaining the vehicle's height and improving its passability.

[0112] Furthermore, the accumulator 20 is connected to the first chamber 1A through the first pipe 5 and to the second chamber 1B through the second pipe 6. After the adjusting push member 2 moves relative to the pressure cylinder 1 to the first target position or the second target position, the attitude control component 30 can be switched to the closed state, and the pressure of the medium in the first suspension component can be stabilized through the accumulator 20, that is, the pressure of the medium in the first suspension component remains unchanged. This allows the push member 2 to remain in a certain position relative to the pressure cylinder 1 for a longer period of time, thereby improving the function of the suspension device 300 and improving the passability of the vehicle 1000.

[0113] Since the accumulator 20 stores some medium, and the accumulator 20 is connected to both the first pipeline 5 and the second pipeline 6, the medium in the accumulator 20 is connected to the medium in the first pipeline 5, the second pipeline 6, the drive component 301, the first chamber 1A and the second chamber 1B. This allows the medium pressure of the entire first suspension assembly to be equal and stable everywhere, thereby allowing the position of the push component 2 relative to the hydraulic cylinder to remain stable for a long time, and even the height of the vehicle body 200 to remain stable for a long time.

[0114] Thus, when vehicle 1000 needs to maintain its body 200 at a certain height for an extended period, such as when traversing a long stretch of uneven road, to avoid the road surface impacting the chassis, the body 200 needs to be raised and maintained for a sufficient time to ensure that vehicle 1000 can pass through the road section without impacting the chassis. With the cooperation of the attitude control component 30 and the energy accumulator 20, the body 200 can be maintained at a certain height for an extended period to ensure the vehicle 1000's passability.

[0115] In some embodiments, referring to FIG3, the attitude control component 30 includes a first switching valve 302. The drive component 301 has a first port 3011 and a second port 3012, the first port 3011 being connected to a first pipeline 5. The first switching valve 302 is connected to the second port 3012 and is switched to be connected to one of the liquid storage container 7 and the second pipeline 6.

[0116] The drive element 301 is configured to drive the flow of the medium. The first switching valve 302 is configured to switch the second port 3012 of the drive element 301 to connect with the liquid storage container 7, or to switch the second port 3012 of the drive element 301 to connect with the second pipeline 6. That is, when the second port 3012 of the drive element 301 is connected to the liquid storage container 7 through the first switching valve 302, the second port 3012 of the drive element 301 is disconnected from the second pipeline 6 through the first switching element. When the second port 3012 of the drive element 301 is connected to the second pipeline 6 through the first switching valve 302, the second port 3012 of the drive element 301 is disconnected from the liquid storage container 7 through the first switching element.

[0117] In this way, when the first switching valve 302 is connected to the second port 3012 and the liquid storage container 7, the first switching valve 302 is not connected to the second pipeline 6, thus preventing the first switching valve 302 from connecting to the second chamber 1B. At this time, the driving component 301 can drive the medium in the liquid storage container 7 to flow sequentially through the first switching valve 302 and the driving component 301 into the first pipeline 5. The medium in the first chamber 1A also enters the first pipeline 5. Part of the medium in the first pipeline 5 enters the accumulator 20, and the other part enters the second chamber 1B through the second pipeline 6, thereby pushing the pushing component 2 to move away from the second chamber 1B. In this way, the pushing component 2 can push the vehicle body 200 to rise, thereby adjusting the height of the vehicle body 200 when the vehicle 1000 goes over potholes or other road conditions to maintain the stability of the vehicle body 200.

[0118] Based on this, when the pusher 2 moves to the first target position with its back to the second chamber 1B, that is, when the vehicle body 200 rises to the first target height, the first switching valve 302 can switch to connect the second port 3012 and the second pipeline 6, and the accumulator 20 maintains the pressure of the medium so that the pusher 2 remains in the first target position.

[0119] In this way, the second port 3012 of the drive component 301 is connected to the second pipeline 6, while the second port 3012 of the drive component 301 is not connected to the liquid storage container 7. Thus, the accumulator 20, the first pipeline 5, the second pipeline 6, the first switching valve 302, the drive component 301, the first chamber 1A, and the second chamber 1B form a first pipeline system. This first pipeline system is a closed system, and the medium pressure within the entire first pipeline system is consistent with and stable compared to the medium pressure within the accumulator 20. Therefore, the pusher 2 can remain stable at the first target position, thereby stabilizing the vehicle body 200 at the first target height. Furthermore, as long as the system pressure does not decrease, the height of the vehicle body 200 will not change, allowing the vehicle body 200 to remain stable at the first target height for an extended period.

[0120] By switching the first switching valve 302 to the second port 3012 of the drive unit 301, which connects to the liquid storage container 7, the drive unit 301 can easily transport the medium in the liquid storage container 7 to the aforementioned first pipeline system, thus facilitating the adjustment of the vehicle body 200's height. Furthermore, once the vehicle body 200's height is adjusted to the first target position, simply switching the first switching valve 302 to the second port 3012 to connect to the second pipeline 6 disconnects the liquid storage container 7 from the first pipeline system. Under the action of the accumulator 20, the pressure of the medium in the first pipeline system can be quickly stabilized, thereby rapidly maintaining the vehicle body 200's height at the first target height for a relatively long period.

[0121] In some embodiments, when the vehicle body 200 is stable at the first target height, the parameters of the suspension device 300 satisfy the following:

[0122] (P1-P0)×(A2-A1)×n=(k1×n 2 +k2)×x1, where x1 is the first target position, P0 is the pressure of the medium in the first suspension assembly when the pusher 2 is at the 0 point position relative to the pressure cylinder 1, and the distance between the 0 point position and the lower limit position of the pusher 2 is equal to the distance between the 0 point position and the upper limit position of the pusher 2.

[0123] P1 is the pressure of the medium in the first suspension assembly when the pusher 2 is located at the first target position x1, A1 is the cross-sectional area of ​​the space in the first chamber 1A used to contain the medium, A2 is the cross-sectional area of ​​the second chamber 1B, k1 is the stiffness of the elastic element, k2 is the stiffness of the buffer bushing 42, and n is the leverage ratio of the suspension device 300.

[0124] It should be noted that since the pushing part 22 of the pusher 2 passes through the first chamber 1A, the pushing part 22 occupies part of the space in the first chamber 1A. As a result, the medium in the first chamber 1A surrounds the pushing part 22. Therefore, the space in the first chamber 1A used to contain the medium is the space of the first chamber 1A minus the space occupied by the pushing part 22. The cross-section of the space in the first chamber 1A used to contain the medium and the cross-section of the second chamber 1B are both perpendicular to the moving direction of the pusher 2 relative to the pressure cylinder 1.

[0125] Furthermore, when the inner cavity of the pressure cylinder 1 is a cylindrical cavity structure, the axis of the cylindrical cavity structure is consistent with the direction of movement of the pusher 2 relative to the pressure cylinder 1. Since the pusher 22 occupies the space of the first chamber 1A, the cross-sectional area of ​​the space in the first chamber 1A used to contain the medium is smaller than the cross-sectional area of ​​the second chamber 1B. Therefore, after the drive member 301 transports the medium in the liquid storage container 7 into the first pipeline system, the pressure in the first pipeline system will rise, and the medium entering the second chamber 1B will generate a larger thrust on the pusher 2, thereby pushing the pusher 2 to move away from the second chamber 1B, so that the vehicle body 200 is raised.

[0126] It should also be noted that adjusting the height of the vehicle body 200 by delivering the medium in the liquid storage container 7 to the first pipeline system via the drive component 301 and maintaining the height of the vehicle body 200 at the first target height is mainly done when the vehicle 1000 is stationary. For example, when the vehicle 1000 is in welcome mode, the suspension device 300 automatically adjusts the height of the vehicle body 200 so that the height of the vehicle body 200 is suitable for drivers and passengers, such as taller people, so as to facilitate drivers and passengers getting in and out of the vehicle and improve their experience.

[0127] Of course, adjustments can also be made while the vehicle 1000 is in motion. For example, if the vehicle 1000 detects a mountain road or a road surface with significant undulations ahead, the height of the vehicle body 200 can be adjusted in advance and maintained at the first target height. However, when the vehicle 1000 is traveling on a mountain road or a road surface with significant undulations, the shock absorption and buffering performance of the suspension device 300 will cause the pusher 2 to move back and forth relative to the pressure cylinder 1 near the first target position.

[0128] In some examples, when the medium is liquid, the drive unit 301 can be a hydraulic pump, which can be driven by an electric motor. When the medium is gaseous, the drive unit 301 can be a fan.

[0129] In some examples, the first switching valve 302 can be a two-position three-way valve, a three-way directional valve, a four-way directional valve, etc.

[0130] Furthermore, the liquid storage container 7 can be connected to the outside environment to maintain the pressure inside the liquid storage container 7 at the same level as atmospheric pressure. The medium inside the liquid storage container 7 is used to replenish the medium in the aforementioned first pipeline system or to recover the medium discharged from the aforementioned first pipeline system.

[0131] If it is necessary to lower the height of the vehicle body 200, i.e., to move the vehicle body 200 toward the wheels 100, the first switching valve 302 can be switched to connect the second port 3012 and the liquid storage container 7, and the drive unit 301 can be stopped. At this time, the pressure of the medium in the first pipeline system will be higher than the pressure in the liquid storage container 7. Therefore, the medium in the first pipeline system will flow back to the liquid storage container 7 through the drive unit 301 and the first switching valve 302. That is, the medium in the second chamber 1B will flow through the second pipeline 6 and merge with the medium flowing out of the accumulator 20, and then flow back to the liquid storage container 7 through the first pipeline 5, the drive unit 301, and the first switching valve 302 in sequence, thereby reducing the pressure of the medium in the first pipeline system. At this time, the pusher 2 will move toward the second chamber 1B under the pressure of the vehicle body 200 to lower the height of the vehicle body 200. In addition, during the above process, some of the medium entering the first pipeline 5 will enter the first chamber 1A.

[0132] However, the medium in the first pipeline system mentioned above flows back to the liquid storage container 7 through the drive component 301. Since the drive component 301 has a large resistance, it affects the efficiency of the suspension device 300 in adjusting the height of the vehicle body 200.

[0133] Based on this, in some embodiments, please continue to refer to FIG3, the attitude control component 30 further includes a return valve 303 and a second switching valve 304. The return valve 303 has a first valve port 3031 and a second valve port 3032. The first valve port 3031 is connected to the liquid storage container 7. The second valve port 3032 is connected to the first pipeline 5.

[0134] In this way, when the first switching valve 302 connects the second port 3012 and the liquid storage container 7, the drive unit 301 is in a stopped state, and the medium in the second chamber 1B can flow into the liquid storage container 7 in sequence through the second pipeline 6, the first pipeline 5 and the return valve 303, and the medium in the accumulator 20 flows into the liquid storage container 7 in sequence through the first pipeline 5 and the return valve 303, so that the pusher 2 moves toward the second chamber 1B.

[0135] Thus, the medium enters the return valve 303 through the first pipeline 5, and then flows back to the liquid storage container 7 through the return valve 303. The resistance encountered during the return process is small, which can increase the rate of medium return and improve the efficiency of the suspension device 300 in adjusting the body 200.

[0136] In some embodiments, the second switching valve 304 is connected to the first pipeline 5 and is switched to be connected to one of the second valve port 3032 and the first port 3011.

[0137] The second switching valve 304 is configured to switch the first pipeline 5 to connect with the second valve port 3032 of the return valve 303, or to switch the first pipeline 5 to connect with the first port 3011 of the drive member 301. That is, when the first pipeline 5 is connected to the second valve port 3032 of the return valve 303 through the second switching valve 304, the first pipeline 5 is disconnected from the first port 3011 of the drive member 301 through the second switching member. When the first pipeline 5 is connected to the first port 3011 of the drive member 301 through the second switching valve 304, the first pipeline 5 is disconnected from the second valve port 3032 of the return valve 303 through the first switching member.

[0138] Therefore, please refer to Figure 4, which is a schematic diagram of the structure of the suspension device 300 shown in Figure 3, in which the first switching valve 302 is connected to the second port 3012 and the second pipeline 6, and the second switching valve 304 is connected to the first pipeline 5 and the return valve 303.

[0139] When the first switching valve 302 connects the second port 3012 to the second pipeline 6, and the second switching valve 304 connects the first pipeline 5 to the second valve port 3032 of the return valve 303, the drive unit 301 is in a stopped state. The medium in the second chamber 1B can flow through the second pipeline 6 into the first pipeline 5, and the medium in the accumulator 20 enters the first pipeline 5. Part of the medium in the first pipeline 5 flows through the second switching valve 304 and the return valve 303 in sequence into the liquid storage container 7, and the other part enters the first chamber 1A, so that the pusher 2 moves toward the second chamber 1B.

[0140] Thus, as the medium in the second chamber 1B and the accumulator 20 flows back into the storage container 7, the medium pressure in the second pipeline system formed by the accumulator 20, the first pipeline 5, the second pipeline 6, the first switching valve 302, the second switching element, the driving element 301, the first chamber 1A, and the second chamber 1B decreases. Under the pressure of the vehicle body 200, the pushing element 2 moves towards the second chamber 1B, thereby causing the vehicle body 200 to move towards the wheel 100, i.e., the height of the vehicle body 200 decreases. When the vehicle 1000 goes up steps or other road conditions, the height of the vehicle body 200 can be adjusted to maintain the stability of the vehicle body 200.

[0141] Furthermore, the medium in the aforementioned second pipeline system flows back to the liquid storage container 7 through the second switching valve 304 and the return valve 303. The resistance encountered during the return process is small, thereby increasing the rate of medium return and improving the efficiency of the suspension device 300 in adjusting the vehicle body 200.

[0142] Based on this, please refer to Figure 5, which is a schematic diagram of the structure of the suspension device 300 shown in Figure 3, in which the first switching valve 302 is connected to the second port 3012 and the second pipeline 6, and the second switching valve 304 is connected to the first pipeline 5 and the first port 3011.

[0143] When the pusher 2 moves toward the second chamber 1B to the second target position, the first switching valve 302 connects the second port 3012 and the second pipeline 6, the second switching valve 304 connects the first pipeline 5 and the first port 3011, and the accumulator 20 maintains the pressure of the medium so that the pusher 2 is kept in the second target position.

[0144] In this way, the first port 3011 of the drive component 301 is connected to the first pipeline 5, and the second port 3012 of the drive component 301 is connected to the second pipeline 6. Thus, the second pipeline system formed by the accumulator 20, the first pipeline 5, the second pipeline 6, the first switching valve 302, the second switching valve 304, the drive component 301, the first chamber 1A, and the second chamber 1B is a closed pipeline system. The medium pressure in the entire second pipeline system is consistent with the medium pressure in the accumulator 20 and remains stable. As a result, the pusher 2 can remain stable at the second target position, thereby stabilizing the vehicle body 200 at the second target height. Furthermore, as long as the system pressure does not decrease, the height of the vehicle body 200 will not change, thus allowing the vehicle body 200 to remain stable at the second target height for a long time.

[0145] By switching the first switching valve 302 to connect the second port 3012 of the drive unit 301 to the second pipeline 6, and switching the second switching valve 304 to connect the first pipeline 5 to the return valve 303, and keeping the drive unit 301 in a stopped state, the medium in the second pipeline system can be quickly returned to the storage container 7, thereby quickly lowering the vehicle body 200 to the second target height for easy height adjustment. Furthermore, after the vehicle body 200 height is adjusted to the second target position, simply switching the first switching valve 302 to connect the second port 3012 to the second pipeline 6, and switching the second switching valve 304 to connect the first port 3011 to the first pipeline 5, disconnecting the storage container 7 from the second pipeline system, allows the pressure of the medium in the second pipeline system to be quickly stabilized under the action of the accumulator 20, thus quickly maintaining the vehicle body 200 at the second target height for a relatively long period.

[0146] In some embodiments, when the vehicle body 200 is stable at the second target height, the parameters of the suspension device 300 satisfy the following:

[0147] (P0-P2)×(A2-A1)×n=(k1×n 2 +k2)×x2, where x2 is the second target position, P0 is the pressure of the medium in the first suspension assembly when the pusher 2 is at position 0 relative to the pressure cylinder 1; P2 is the pressure of the medium in the first suspension assembly when the pusher 2 is at the second target position x1, A1 is the cross-sectional area of ​​the space in the first chamber 1A used to contain the medium, A2 is the cross-sectional area of ​​the second chamber 1B, k1 is the stiffness of the elastic element, k2 is the stiffness of the buffer bushing 42, and n is the lever ratio of the suspension device 300.

[0148] It should be noted that the height of the vehicle body 200 is lowered by returning the medium in the second pipeline system to the liquid storage container 7, and the height of the vehicle body 200 is maintained at the second target height mainly by adjusting the vehicle 1000 when it is stationary. For example, when the vehicle 1000 is in welcome mode, the suspension device 300 automatically adjusts the height of the vehicle body 200 so that the height of the vehicle body 200 is suitable for passengers, such as children, so as to facilitate passengers getting in and out of the vehicle and improve the passengers' experience.

[0149] Of course, adjustments can also be made while the vehicle 1000 is in motion. For example, when the vehicle 1000 detects a low underpass ahead, the height of the vehicle body 200 can be adjusted in advance and kept at the second target height to avoid the vehicle 1000 scraping against the top of the underpass when passing through it.

[0150] Furthermore, when the attitude control component 30 includes a first switching valve 302, a second switching valve 304, and a return valve 303, if it is necessary to raise the vehicle body 200 to the first target height, the first switching valve 302 needs to be switched to the second port 3012 of the drive member 301 to connect with the liquid storage container 7, and the first switching valve 302 needs to be switched to the first port 3011 of the drive member 301 to connect with the first pipeline 5, while the return valve 303 is closed. At this time, the drive member 301 operates, drawing the medium in the liquid storage container 7, so that the medium in the liquid storage container 7 flows sequentially through the second switching valve 304, the drive member 301, and the second switching valve 304 before entering the first pipeline 5. The medium in the first chamber 1A also enters the first pipeline 5. Part of the medium in the first pipeline 5 enters the accumulator 20, and the other part flows through the second pipeline 6 into the second chamber 1B to provide a thrust to the push member 2 against the second chamber 1B, thereby pushing the vehicle body 200 to rise.

[0151] When the vehicle body 200 is raised to the first target height, the first switching valve 302 switches to the second port 3012 of the drive component 301 and connects to the second pipeline 6, and the second switching valve 304 switches to the first port 3011 of the drive component 301 and connects to the first pipeline 5, so that the vehicle body 200 is kept at the first target height.

[0152] In some examples, the second switching valve 304 can be a two-position three-way valve, a three-way directional valve, a four-way directional valve, etc.

[0153] In some examples, the reflux valve 303 can be an electrically controlled regulating valve, a solenoid valve, etc.

[0154] In some embodiments, the suspension device 300, in addition to adjusting the height of the vehicle body 200 and maintaining it at the adjusted height, can also actively adjust the distance between the vehicle body 200 and the wheels 100 to keep the vehicle body 200 stable when the vehicle 1000 is in motion. For example, when the vehicle 1000 is traveling on a bumpy road, the vehicle body 200 and the wheels 100 will constantly move away from or closer to each other. In order to maintain the stability of the vehicle body 200, it is necessary to continuously adjust the distance between the vehicle body 200 and the wheels 100. This adjustment process can be performed when the vehicle body 200 is maintained at a first target height or a second target height, or when the pusher 2 is at the 0 position.

[0155] In some embodiments, the drive unit 301 includes a bidirectional hydraulic pump 3013 and a bidirectional motor 3014. The bidirectional hydraulic pump 3013 has a first port 3011 and a second port 3012, which are also the first port 3011 and the second port 3012 of the drive unit 301. The first port 3011 is connected to the first pipeline 5, and the second port 3012 is connected to the second pipeline 6.

[0156] A bidirectional motor 3014 is connected to a bidirectional hydraulic pump 3013, and the bidirectional motor 3014 is configured to drive the bidirectional hydraulic pump 3013 to rotate. The bidirectional motor 3014 has two opposite directions of rotation; that is, the bidirectional motor 3014 can rotate in both directions. The bidirectional hydraulic pump 3013 also has two opposite directions of rotation, namely a first direction and a second direction.

[0157] The bidirectional motor 3014, when rotating forward, drives the bidirectional hydraulic pump 3013 to rotate in a first direction; when rotating in reverse, it drives the bidirectional hydraulic pump 3013 to rotate in a second direction. The opposite rotation directions of the bidirectional hydraulic pump 3013 result in opposite flow directions of the medium.

[0158] The bidirectional motor 3014 can drive the bidirectional hydraulic pump 3013 to rotate in the first direction, so as to drive the medium in the second chamber 1B to flow through the bidirectional hydraulic pump 3013 and enter the first pipeline 5. A part of the medium in the first pipeline 5 enters the first chamber 1A to push the pusher 2 to move toward the second chamber 1B. Another part of the medium in the first pipeline 5 enters the accumulator 20 to balance the pressure of the medium in the first suspension assembly.

[0159] It should be noted that since the cross-sectional area of ​​the second chamber 1B is larger than the cross-sectional area of ​​the space in the first chamber 1A used to contain the medium, there is still some medium remaining after it enters the first chamber 1A from the second chamber 1B into the bidirectional hydraulic pump 3013. The remaining part will enter the accumulator 20 for storage.

[0160] The bidirectional motor 3014 drives the bidirectional hydraulic pump 3013 to rotate in the second direction, so as to drive the medium in the first chamber 1A to flow through the bidirectional hydraulic pump 3013 and enter the second pipeline 6. At least part of the medium in the second pipeline 6 enters the second chamber 1B to push the pusher 2 to move away from the second chamber 1B. The medium in the accumulator 20 flows through the first pipeline 5 and enters the bidirectional hydraulic pump 3013 to balance the pressure of the medium in the first suspension assembly.

[0161] It should be noted that since the cross-sectional area of ​​the second chamber 1B is larger than the cross-sectional area of ​​the space in the first chamber 1A used to contain the medium, the amount of medium entering the bidirectional hydraulic pump 3013 from the first chamber 1A cannot meet the medium demand of the second chamber 1B. At this time, the medium in the accumulator 20 will also flow into the bidirectional hydraulic pump 3013 and into the second chamber 1B to supplement the medium demand of the second chamber 1B.

[0162] With the above settings, when the vehicle 1000 is driving on a bumpy road, the bidirectional motor 3014 can drive the bidirectional hydraulic pump 3013 to continuously switch between rotating in the first direction and rotating in the second direction, so as to continuously adjust the distance between the body 200 and the wheel 100, thereby ensuring the stability of the body 200 and improving the driving experience of the vehicle 1000.

[0163] Furthermore, when the bidirectional hydraulic pump 3013 rotates in the first direction, the medium entering the first chamber 1A generates a thrust on the pusher 2 towards the second chamber 1B. Additionally, the medium flowing out of the second chamber 1B also generates a suction force on the pusher 2, thereby accelerating the movement of the pusher 2 and enabling the suspension device 300 to respond quickly, thus improving the adjustment efficiency of the suspension device 300 in adjusting the distance between the vehicle body 200 and the wheels 100. Similarly, when the bidirectional hydraulic pump 3013 rotates in the second direction, it also enables the suspension device 300 to respond quickly, improving the adjustment efficiency of the suspension device 300 in adjusting the distance between the vehicle body 200 and the wheels 100.

[0164] In some embodiments, the attitude control assembly 30 includes a first switching valve 302 and a second switching valve 304. The first switching valve 302 is connected to a second port 3012 and is in reverse connection with one of the liquid storage container 7 and the second chamber 1B; the second switching valve 304 is connected to a first pipeline 5 and is in reverse connection with one of the second valve port 3032 and the first port 3011. When the bidirectional hydraulic pump 3013 rotates in a first direction or in a second direction, the first switching valve 302 connects to the second port 3012 and the second chamber 1B, and the second switching valve 304 connects to the first port 3011 and the first pipeline 5.

[0165] In this way, during the process of adjusting the distance between the vehicle body 200 and the wheel 100 by continuously switching between the first and second direction rotation of the bidirectional hydraulic pump 3013, the second pipeline system is not connected to the liquid storage container 7, thereby maintaining the medium pressure in the second pipeline system at a constant level. Thus, after the distance between the vehicle body 200 and the wheel 100 is adjusted, the height of the vehicle body 200 can be maintained at the height before the distance between the vehicle body 200 and the wheel 100 was adjusted, thereby improving the passability, handling and comfort of the vehicle 1000.

[0166] In some embodiments, the vehicle 1000 also has a damping adjustment mode. For example, when the vehicle 1000 is on a gravel road, it will frequently and rapidly bump. At this time, the suspension device 300 needs to provide damping to the body 200 after being subjected to road impact force to reduce the bumping of the body 200.

[0167] In some examples, the first conduit 5 includes a first pipe 51 and a first valve assembly 52, the first valve assembly 52 being connected between the first pipe 51 and the accumulator 20, and one end of the first chamber 1A and the drive 301 being connected to the first pipe 51.

[0168] In this way, when the vehicle 1000 is impacted by the road surface and the wheel 100 jumps, it will generate an upward thrust on the pressure cylinder 1 of the first shock absorber 10, which will cause the pusher 2 to squeeze the medium in the second chamber 1B. Under the pressure, the medium in the second chamber 1B will flow out from the second chamber 1B to the second pipeline 6, and then part of it will enter the accumulator 20, and the other part will flow through the first valve assembly 52 and the first pipeline 51 in sequence into the first chamber 1A.

[0169] During this process, the flow rate of the medium can be controlled by adjusting the first valve assembly 52 to improve the damping performance of the pusher 2 and the pressure cylinder 1, thereby preventing the medium in the second chamber 1B from flowing out too quickly and causing the body 200 to move too fast toward the wheel 100, so as to avoid the body 200 shaking too much and affecting the driving experience.

[0170] When the vehicle 1000 is impacted, causing the wheel 100 to bounce, it will generate a downward pulling force on the pressure cylinder 1 of the first shock absorber 10, which will cause the pusher 2 to squeeze the medium in the first chamber 1A. Under the pressure, the medium in the first chamber 1A will flow out from the first chamber 1A to the first pipe 51, and after flowing through the first valve assembly 52, it will flow through the second pipe 6 into the second chamber 1B. At this time, part of the medium in the accumulator 20 can also enter the second chamber 1B through the second pipe 6.

[0171] During this process, the flow rate of the medium can be controlled by adjusting the first valve assembly 52 to improve the damping performance of the pusher 2 and the pressure cylinder 1, thereby preventing the medium in the first chamber 1A from flowing out too quickly and causing the vehicle body 200 to move too fast away from the wheel 100, so as to avoid the vehicle body 200 shaking too much and affecting the driving experience.

[0172] In addition, during the upward and downward jumping of the wheel 100, some medium will flow through the drive member 301 between the first chamber 1A and the second chamber 1B. At this time, the controller can control the drive member 301 to not rotate, so as to minimize the amount of medium flowing through the drive member 301 and reduce the impact of the medium flowing through the drive member 301 on the damping performance of the first shock absorber 10.

[0173] In some examples, the second conduit 6 includes a second pipe 61 and a second valve assembly 62 connected between the second pipe 61 and the accumulator 20, and the other end of the second chamber 1B and the drive 301 are both connected to the second pipe 61.

[0174] At this time, when wheel 100 bounces up or down, the damping performance of the first shock absorber 10 can be adjusted by adjusting the size of the second valve assembly 62 to prevent excessive shaking of the vehicle body 200. The adjustment process can refer to the adjustment process of the first valve assembly 52 in the first pipeline 5, and will not be described in detail here.

[0175] In some examples, the first conduit 5 includes a first pipe 51 and a first valve assembly 52, the first valve assembly 52 being connected between the first pipe 51 and the accumulator 20, and one end of the first chamber 1A and the attitude control assembly 30 being connected to the first pipe 51. Furthermore, the second conduit 6 includes a second pipe 61 and a second valve assembly 62, the second valve assembly 62 being connected between the second pipe 61 and the accumulator 20, and the other end of the second chamber 1B and the attitude control assembly 30 being connected to the second pipe 61.

[0176] At this point, the damping performance of the first shock absorber 10 can be adjusted by adjusting at least one of the first valve assembly 52 and the second valve assembly 62 to prevent excessive shaking of the vehicle body 200. The adjustment process can be referred to the adjustment process of the first valve assembly 52 in the first pipeline 5, and will not be described in detail here.

[0177] In some embodiments, the first valve assembly 52 includes a first damping valve 521 and a first check valve 522 connected in parallel between the first pipe 51 and the accumulator 20. The second valve assembly 62 includes a second damping valve 621 and a second check valve 622 connected in parallel between the second pipe 61 and the accumulator 20.

[0178] The first check valve 522 is configured to allow the medium to flow from the second line 6 to the first line 51. The second check valve 622 is configured to allow the medium to flow from the first line 5 to the second line 61.

[0179] In this way, as the pusher 2 moves toward the second chamber 1B under force, for example, during the upward movement of the wheel 100, the pusher 2 compresses the medium in the second chamber 1B and enters the second damping valve 621 through the second pipe 61. Part of the medium entering the second damping valve 621 enters the accumulator 20, and the other part flows sequentially through the first one-way valve 522 and the first pipe 51 into the first chamber 1A.

[0180] At this point, the flow rate of the medium can be adjusted by regulating the opening of the second damping valve 621, thereby regulating the outflow speed of the medium in the second chamber 1B, and adjusting the damping performance of the first shock absorber 10 to prevent excessive body swaying and affect the driving experience. The second damping valve 621 can precisely regulate the flow rate of the medium and keep the pressure of the medium in the first suspension assembly relatively stable to ensure the stability of the medium flow, thereby ensuring the stability of the movement of the pusher 2 relative to the pressure cylinder 1 and reducing body swaying.

[0181] Furthermore, through the cooperation of the first one-way valve 522 and the second damping valve 621, the response speed of the suspension device 300 can be improved while ensuring the damping performance of the first shock absorber 10.

[0182] During the process of the pusher 2 moving away from the second chamber 1B under force, for example, during the process of the wheel 100 being lowered, the pusher 2 squeezes the medium in the first chamber 1A and enters the first damping valve 521 through the first pipe 51. The medium entering the first damping valve 521 flows through the second one-way valve 622 and the second pipe 61 in sequence into the second chamber 1B.

[0183] Furthermore, during this process, a portion of the medium in the accumulator 20 may flow sequentially through the second one-way valve 622 and the second pipe 61 into the second chamber 1B.

[0184] At this time, the flow rate of the medium can be adjusted by regulating the opening of the first damping valve 521, thereby regulating the outflow speed of the medium in the first chamber 1A, and thus adjusting the damping performance of the first shock absorber to prevent excessive shaking of the vehicle body 200 from affecting the driving experience. The first damping valve 521 can precisely regulate the flow rate of the medium and keep the pressure of the medium in the first shock absorber assembly relatively stable to ensure the stability of the medium flow, thereby ensuring the stability of the movement of the pusher 2 relative to the pressure cylinder 1 and reducing the shaking of the vehicle body 200.

[0185] Furthermore, by cooperating with the second one-way valve 622 and the first damping valve 521, the response speed of the suspension device 300 can be improved while ensuring the damping performance of the first shock absorber 10.

[0186] In some embodiments, as the pusher 2 moves toward the second chamber 1B under force (e.g., the impact force of the road surface), it squeezes the medium in the second chamber 1B so that the medium enters the second damping valve 621 through the second pipe 61. A portion of the medium entering the second damping valve 621 enters the accumulator 20, and the other portion flows sequentially through the first check valve 522 and the first pipe 51 into the first chamber 1A.

[0187] During the process of the pusher 2 moving away from the second chamber 1B under force (e.g., the impact force of the road surface), it squeezes the medium in the first chamber 1A, so that the medium enters the first damping valve 521 through the first pipe 51. The medium entering the first damping valve 521 flows through the second check valve 622 and the second pipe 61 in sequence into the second chamber 1B.

[0188] In this way, when the vehicle is subjected to external forces such as road impact, the pusher 2 can move within the pressure cylinder, thereby causing the medium in the first chamber 1A and the second chamber 1B to flow, thereby generating a damping force on the vehicle body to reduce the vibration of the vehicle body.

[0189] In some embodiments, the attitude control component 30 includes a first switching valve 302 and a second switching valve 304. The first switching valve 302 is connected to a second port 3012 and is in reverse connection with one of the liquid storage container 7 and the second chamber 1B. The second switching valve 304 is connected to a first pipeline 5 and is in reverse connection with one of the second valve port 3032 and the first port 3011. During the process of the pusher 2 moving towards the second chamber 1B under force or during the process of the pusher 2 moving away from the second chamber 1B under force, the first switching valve 302 connects the second port 3012 and the second pipeline 6, and the second switching valve 304 connects the first port 3011 and the first pipeline 5.

[0190] In this way, during the process of the pusher 2 moving towards the second chamber 1B under force or moving away from the second chamber 1B under force, the second pipeline system is not connected to the liquid storage container 7, thereby maintaining the medium pressure in the second pipeline system unchanged. Thus, after the distance between the vehicle body 200 and the wheel 100 is adjusted, the height of the vehicle body 200 can be maintained at the height before the distance between the vehicle body 200 and the wheel 100 was adjusted, improving the passability, handling and comfort of the vehicle 1000.

[0191] In some embodiments, the accumulator 20 is provided with an energy storage chamber 201 and a pressure regulating chamber 202. The energy storage chamber 201 is connected to a first chamber 1A through a first pipeline 5 and to a second chamber 1B through a second pipeline 6. The pressure regulating chamber 202 is provided with compressed gas, which can be compressed against the medium in the energy storage chamber 201.

[0192] In some embodiments, the internal space of the accumulator 20 can be divided into two independent enclosed chambers by a flexible partition: one is the energy storage chamber 201, and the other is the pressure regulating chamber 202. When a medium enters the energy storage chamber 201 of the accumulator 20, the pressure inside the energy storage chamber 201 increases, which squeezes the compressed gas in the pressure regulating chamber 202, thereby compressing the compressed gas and increasing the space inside the energy storage chamber 201 to accommodate more medium.

[0193] When the medium pressure in the suspension device 300 decreases, the compressed gas in the pressure regulating chamber 202 will squeeze the medium in the energy storage chamber 201, so that the medium in the energy storage chamber 201 flows out of the energy storage chamber 201 to replenish the medium in the first chamber 1A or the second chamber 1B.

[0194] The accumulator 20 can store or replenish the system with a medium when the suspension device 300 is working, so as to maintain the stability of the system pressure and ensure the performance of the suspension device 300.

[0195] In some embodiments, please refer to FIG6, which is a schematic diagram of another structure of the suspension device in the vehicle shown in FIG1. ​​The drive member 301 has a first port 3011 and a second port 3012. The first port 3011 is connected to the first pipe 5 through a third pipe 8, and the second port 3012 is connected to the second pipe 6 through a fourth pipe 9.

[0196] The attitude control assembly 30 includes a first switching valve 305, which is connected between the liquid storage container 7 and a first position of the fourth pipeline 9. The first switching valve 305 is configured to connect the fourth pipeline to the liquid storage container 7 or disconnect the fourth pipeline from the liquid storage container 7. For example, the first switching valve 305 can be an electric regulating valve, a butterfly valve, a ball valve, a two-position one-way valve, etc.

[0197] The first switching valve 305 opens, allowing the attitude control component 30 to be in the connected state. At this time, the fourth pipeline is connected to the liquid storage container 7, thereby connecting the drive component 301 to the liquid storage container 7 via the fourth pipeline.

[0198] The drive unit 301 can drive the medium in the storage container 7 to flow sequentially through the first switching valve 305 and the drive unit 301 into the first pipeline 5. The medium in the first chamber 1A also enters the first pipeline 5. Part of the medium in the first pipeline 5 enters the accumulator 20, and the other part enters the second chamber 1B through the second pipeline 6, so as to push the pusher 2 to move away from the second chamber 1B. In this way, the pusher 2 can push the vehicle body 200 to rise, thereby adjusting the height of the vehicle body 200 when the vehicle 1000 goes over potholes or other road conditions to maintain the stability of the vehicle body 200.

[0199] Based on this, after the pusher 2 moves away from the second chamber 1B to the first target position, the first switching valve 305 closes, so that the attitude control assembly 30 is in a closed state. That is, the fourth pipeline is disconnected from the liquid storage container 7, thereby disconnecting the first suspension assembly from the liquid storage container 7, so that the first suspension assembly is in a closed state. At this time, the accumulator 20 maintains the pressure of the medium to keep the pusher 2 in the first target position.

[0200] Due to the pressure stabilization performance of the accumulator 20, the pressure of the first suspension assembly can be kept stable for a long time, thereby keeping the pusher 2 in the first target position for a long time and improving the vehicle's passability.

[0201] If you want to lower the height of the vehicle body, you can open the first switch valve 305 to control the drive unit 301 to be in a stopped state. At this time, the medium in the second chamber 1B will flow back into the liquid storage container 7, thereby lowering the height of the vehicle body.

[0202] In some embodiments, referring to FIG6, the attitude control assembly 30 further includes a second switching valve 306. The second switching valve 306 is connected between the liquid reservoir 7 and a second position of the third pipeline 8. The second switching valve 306 is configured to connect the liquid reservoir 7 and the third pipeline, or to disconnect the connection between the liquid reservoir 7 and the third pipeline. For example, the second switching valve 306 can be an electrically operated regulating valve, a butterfly valve, a ball valve, a two-position one-way valve, etc.

[0203] The first switching valve 305 is closed and the second switching valve 306 is open, allowing the attitude control component 30 to be in the engaged state. At this time, the first suspension assembly is connected to the liquid storage container 7, allowing the drive component 301 to be in the stopped state. The medium in the second chamber 1B can flow through the second pipeline 6 into the first pipeline 5, and the medium in the accumulator 20 enters the first pipeline 5. Part of the medium in the first pipeline 5 flows through the second switching valve 306 into the liquid storage container 7, while the other part enters the first chamber 1A, causing the pusher 2 to move towards the second chamber 1B.

[0204] In this way, the medium can flow back to the reservoir 7 through the first pipe 5, the third pipe 8 and the second switch valve 306 in sequence, thereby reducing the amount of medium flowing back to the reservoir 7 through the drive component 301, making the resistance encountered by the medium in the return process smaller, thereby increasing the rate of medium return and improving the efficiency of the suspension device 300 in adjusting the body 200.

[0205] In some embodiments, referring to FIG6, the attitude control assembly 30 further includes a third check valve 307. The third check valve 307 is connected between the second switching valve 306 and the liquid storage container 7, and is configured to allow the medium to flow from the second switching valve 306 to the liquid storage container 7.

[0206] By setting the third one-way valve 307, when the attitude control component 30 is in the connected state, during the process of the medium in the reservoir 7 being transported to the first suspension component by the drive component 301, the liquid reservoir 7 and the third pipe 8 are more completely shut off, and the medium is prevented from circulating between the liquid reservoir 7, the fourth pipe, the drive component 301 and the third pipe 8, so as to improve the efficiency of replenishing the medium to the first suspension component.

[0207] In some embodiments, please refer to FIG7, which is a structural schematic diagram of the suspension device shown in FIG6 with a third switching valve and a fourth switching valve. The attitude control assembly 30 also includes a third switching valve 308. The third switching valve 308 is connected between the first position and the second pipeline 6. The third switching valve 308 is configured to connect the first position of the fourth pipeline and the second pipeline 6, or to disconnect the connection between the first position of the fourth pipeline and the second pipeline 6. For example, the third switching valve 308 can be an electrically adjustable valve, a butterfly valve, a ball valve, a two-position one-way valve, etc.

[0208] The first switching valve 305 is opened and the third switching valve 308 is closed, so that the attitude control component 30 is in the connected state. At this time, the drive unit 301 is connected to the liquid storage container 7 through the fourth pipe, and the fourth pipe is disconnected from the second pipe, so that the drive unit 301 is disconnected from the second pipe.

[0209] The drive unit 301 can drive the medium in the liquid storage container 7 to flow sequentially through the first switch valve 305 and the drive unit 301 into the first pipeline 5. The medium in the first chamber 1A also enters the first pipeline 5. Part of the medium in the first pipeline 5 enters the accumulator 20, and the other part enters the second chamber 1B through the second pipeline 6, so as to push the pusher 2 to move away from the second chamber 1B, thereby increasing the height of the vehicle body.

[0210] Furthermore, during the aforementioned process, since the third switching valve 308 disconnects the connection between the drive unit 301 and the sixth pipeline, the drive unit 301 will not extract the medium in the second chamber 1B during operation, thereby improving the efficiency of replenishing the medium to the second chamber 1B and improving the efficiency of the suspension device 300 in adjusting the vehicle body 200.

[0211] In some embodiments, referring to FIG7, the attitude control assembly 30 further includes a fourth switching valve 309. The fourth switching valve 309 is connected between the second position and the first port 3011. The fourth switching valve 309 is configured to connect the second position of the third pipe 8 and the first port 3011 of the actuator 301, or to disconnect the connection between the second position of the third pipe 8 and the first port 3011 of the actuator 301. For example, the fourth switching valve 309 can be an electrically operated regulating valve, a butterfly valve, a ball valve, a two-position one-way valve, etc.

[0212] The first switching valve 305 is closed, the second switching valve 306 is open, and the fourth switching valve 309 is closed, so that the attitude control component 30 is in the connected state. At this time, the fourth pipeline is connected to the liquid storage container 7, but the fourth pipeline is disconnected from the drive component, and the first switching valve 305 is closed to disconnect the liquid storage container 7 from the second pipeline 6.

[0213] When the drive unit 301 is in the stopped state, the medium in the second chamber 1B can flow through the second pipeline 6 into the first pipeline 5. The medium in the accumulator 20 enters the first pipeline 5. Part of the medium in the first pipeline 5 flows through the second switch valve 306 and then into the liquid storage container 7, while the other part enters the first chamber 1A, so that the pusher 2 moves toward the second chamber 1B.

[0214] During the above process, since the first switching valve 305 and the fourth switching valve 309 are closed, the medium will not flow back to the storage container 7 through the driving component 301 during the reflux process. Instead, it will flow back to the storage container 7 through the second switching valve 306, thereby reducing the resistance during medium reflux and improving the reflux efficiency of the medium.

[0215] It should be noted that the third switch valve 308 can be closed or opened.

[0216] 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 suspension device, comprising: At least one first suspension assembly, any one of the at least one first suspension assemblies comprising a first shock absorber (10) and a first adjustment assembly, the first adjustment assembly being configured to adjust at least one of the main force and damping force of the first shock absorber (10); and A liquid storage container (7) is configured to store a medium. The liquid storage container (7) is connected to the first adjustment component. When the medium in the liquid storage container (7) is replenished into the first suspension component, the length of the first shock absorber (10) increases. When the medium in the first suspension component is discharged into the liquid storage container (7), the length of the first shock absorber (10) decreases.

2. The suspension device according to claim 1, wherein, The first suspension assembly further includes an attitude control assembly (30) capable of switching between an engaged state and a disengaged state; When the attitude control component (30) is in the access state, the first suspension component is connected to the liquid storage container (7); when the attitude control component (30) is in the closed state, the first suspension component is disconnected from the liquid storage container (7).

3. The suspension device according to claim 2, wherein, The first shock absorber (10) includes a pressure cylinder (1) and a pusher (2) that are movable relative to each other, at least a portion of the pusher (2) being located within the pressure cylinder (1) and dividing the pressure cylinder (1) into a first chamber (1A) and a second chamber (1B); The first adjustment component is connected to the first chamber (1A) and the second chamber (1B) respectively.

4. The suspension device according to claim 3, wherein, The pusher (2) includes: A piston section (21) is disposed within the pressure cylinder (1) and divides the pressure cylinder (1) into a first chamber (1A) and a second chamber (1B); and The pusher (22) has one end connected to the piston (21), and the other end of the pusher (22) opposite to the first end passes through the first chamber (1A) and extends to the outside of the pressure cylinder (1).

5. The suspension device according to claim 4, wherein, The first adjustment component includes: The first pipeline (5) is connected to the first chamber (1A); A second conduit (6) is connected to the second chamber (1B); and A drive unit (301) is connected between the first pipeline (5) and the second pipeline (6), and the drive unit (301) is configured to replenish the medium in the liquid storage container (7) into the first suspension assembly.

6. The suspension device according to claim 5, wherein, The drive unit (301) includes: A bidirectional hydraulic pump (3013) is connected between the first pipeline (5) and the second pipeline (6); and A bidirectional motor (3014) is connected to the bidirectional hydraulic pump (3013), and the bidirectional motor (3014) is configured to drive the bidirectional hydraulic pump (3013) to rotate, thereby causing the medium to flow between the first suspension assembly and the liquid storage container (7).

7. The suspension device according to claim 6, wherein, The first adjustment component further includes: An accumulator (20) is connected between a first pipeline (5) and a second pipeline (6), and the accumulator (20) is configured to stabilize the medium pressure of the first suspension assembly.

8. The suspension device according to claim 7, further satisfying at least one of the following: When the attitude control component (30) is in the access state, the drive (301) operates, replenishing the medium in the liquid storage container (7) into the first pipeline (5). A portion of the medium in the first pipeline (5) enters the accumulator (20), and another portion enters the second chamber (1B), thereby pushing the pusher (2) to move away from the second chamber (1B); and When the attitude control component (30) is in the access state, the drive component (301) is in the shutdown state. The medium in the second chamber (1B) and the medium in the accumulator (20) enter the first pipeline (5). Part of the medium in the first pipeline (5) is discharged to the liquid storage container (7) after passing through the attitude control component (30), and the other part enters the first chamber (1A) so that the pusher (2) moves toward the second chamber (1B).

9. The suspension device according to claim 8, wherein, After the pusher (2) moves away from the second chamber (1B) to the first target position, or after the pusher (2) moves toward the second chamber (1B) to the second target position, the attitude control component (30) switches to the closed state, and the energy accumulator (20) maintains the medium pressure of the first suspension component to keep the position of the pusher (2).

10. The suspension device according to claim 9, wherein, After the pusher (2) moves away from the second chamber (1B) to the first target position, or after the pusher (2) moves towards the second chamber (1B) to the second target position, the drive (301) is in a stopped state, the attitude control component (30) switches to the closed state, and the accumulator (20) maintains the medium pressure of the first suspension component to keep the position of the pusher (2).

11. The suspension device according to claim 9 or 10, wherein, The drive unit (301) has a first port (3011) and a second port (3012), and the first port (3011) is connected to the first pipeline (5); The attitude control component (30) includes a first switching valve (302), which is connected to the second port (3012) and is switched to one of the liquid storage container (7) and the second pipeline (6).

12. The suspension device according to claim 11, wherein, The first switching valve (302) connects the second port (3012) to the liquid storage container (7) so that the attitude control component (30) is in the access state; the driving member (301) can drive the medium in the liquid storage container (7) to flow through the first switching valve (302) and the driving member (301) in sequence and then enter the first pipeline (5). The medium in the first chamber (1A) also enters the first pipeline (5). A part of the medium in the first pipeline (5) enters the accumulator (20), and another part enters the second chamber (1B) through the second pipeline (6) so as to push the pushing member (2) to move away from the second chamber (1B).

13. The suspension device according to claim 12, wherein, After the pusher (2) moves to the first target position with its back to the second chamber (1B), the first switching valve (302) can switch to connect the second port (3012) and the second pipeline (6) so that the attitude control component (30) is in the closed state, and the accumulator (20) maintains the pressure of the medium so that the pusher (2) is kept in the first target position.

14. The suspension device according to any one of claims 11-13, wherein, The attitude control component (30) further includes: A reflux valve (303) has a first valve port (3031) and a second valve port (3032). The first valve port (3031) is connected to the liquid storage container (7), and the second valve port (3032) is connected to the first pipeline (5).

15. The suspension device according to claim 14, wherein, The attitude control component (30) further includes: The second switching valve (304) is connected to the first pipeline (5) and is switched to one of the second valve port (3032) and the first port (3011).

16. The suspension device according to claim 15, wherein, The first switching valve (302) connects the second port (3012) to the second pipeline (6), and the second switching valve (304) connects the first pipeline (5) to the return valve (303) so that the attitude control component (30) is in the access state; When the drive unit (301) is in a stopped state, the medium in the second chamber (1B) can flow through the second pipeline (6) into the first pipeline (5). The medium in the accumulator (20) enters the first pipeline (5). Part of the medium in the first pipeline (5) flows through the second switching valve (304) and the return valve (303) in sequence into the liquid storage container (7), and the other part enters the first chamber (1A) so that the pusher (2) moves toward the second chamber (1B).

17. The suspension device according to claim 16, wherein, When the pusher (2) moves toward the second chamber (1B) to the second target position, the first switching valve (302) connects the second port (3012) and the second pipeline (6), and the second switching valve (304) connects the first pipeline (5) and the first port (3011) so that the attitude control component is in the closed state, and the accumulator (20) maintains the pressure of the medium so that the pusher (2) is held in the second target position.

18. The suspension device according to any one of claims 5-17, wherein, The drive unit (301) has a first port (3011) and a second port (3012). The first port (3011) is connected to the first pipeline (5) through a third pipe (8), and the second port (3012) is connected to the second pipeline (6) through a fourth pipe (9). The attitude control component (30) includes a first switching valve (305) connected between the liquid storage container (7) and a first position of the fourth pipe (9).

19. The suspension device according to claim 18, wherein, The first switching valve is opened so that the attitude control component (30) is in the access state. The drive (301) can drive the medium in the liquid storage container (7) to flow sequentially through the first switching valve (305) and the drive (301) into the first pipeline (5). The medium in the first chamber (1A) also enters the first pipeline (5). A portion of the medium in the first pipeline (5) enters the accumulator (20) of the first regulating component, and another portion enters the second chamber (1B) through the second pipeline (6) to push the pusher (2) to move away from the second chamber (1B).

20. The suspension device according to claim 19, wherein, After the pusher (2) moves to the first target position with its back to the second chamber (1B), the first switch valve closes so that the attitude control assembly (30) is in the closed state, and the accumulator (20) maintains the pressure of the medium so that the pusher (2) remains in the first target position.

21. The suspension device according to claim 19 or 20, wherein, The attitude control component (30) further includes a second switching valve (306), which is connected between the liquid storage container (7) and the second position of the third pipe (8).

22. The suspension device according to claim 21, wherein, The first switching valve (305) is closed and the second switching valve (306) is open, so that the attitude control component (30) is in the access state; When the drive unit (301) is in a stopped state, the medium in the second chamber (1B) can flow through the second pipeline (6) into the first pipeline (5). The medium in the accumulator (20) enters the first pipeline (5). Part of the medium in the first pipeline (5) flows through the second switch valve (306) into the liquid storage container (7), and the other part enters the first chamber (1A) so that the pusher (2) moves toward the second chamber (1B).

23. The suspension device according to claim 21 or 22, wherein, The attitude control assembly (30) further includes a third check valve (307) connected between the second switching valve (306) and the liquid storage container (7), and the third check valve (307) is configured to allow the medium to flow from the second switching valve (306) to the liquid storage container (7).

24. The suspension device according to any one of claims 21-23, wherein, The attitude control component (30) further includes a third switching valve (308) connected between the first position and the second pipeline (6).

25. The suspension device according to claim 24, wherein, The first switching valve (305) is opened and the third switching valve (308) is closed, so that the attitude control component (30) is in the access state. The drive (301) can drive the medium in the liquid storage container (7) to flow sequentially through the first switching valve (305) and the drive (301) into the first pipeline (5). The medium in the first chamber (1A) also enters the first pipeline (5). A portion of the medium in the first pipeline (5) enters the accumulator (20), and another portion enters the second chamber (1B) through the second pipeline (6) to push the pusher (2) to move away from the second chamber (1B).

26. The suspension device according to claim 24 or 25, wherein, The attitude control component (30) further includes a fourth switching valve (309) connected between the second position and the first port (3011).

27. The suspension device according to claim 26, wherein, The first switching valve (305) is closed, the second switching valve (306) is open, and the fourth switching valve (309) is closed, so that the attitude control component (30) is in the access state; When the drive unit (301) is in a stopped state, the medium in the second chamber (1B) can flow through the second pipeline (6) into the first pipeline (5). The medium in the accumulator (20) enters the first pipeline (5). Part of the medium in the first pipeline (5) flows through the second switch valve (306) into the liquid storage container (7), and the other part enters the first chamber (1A) so that the pusher (2) moves toward the second chamber (1B).

28. The suspension device according to any one of claims 6-27, further satisfying at least one of the following: The attitude control component (30) is in the closed state. The bidirectional motor (3014) of the drive member (301) drives the bidirectional hydraulic pump (3013) to rotate in the first direction, so as to drive the medium in the second chamber (1B) to flow through the bidirectional hydraulic pump (3013) and enter the first pipeline (5). A portion of the medium in the first pipeline (5) enters the first chamber (1A) to push the push member (2) towards the second chamber (1B). Another portion of the medium in the first pipeline (5) enters the accumulator (20) of the first adjustment component to balance the medium pressure in the first suspension component. The attitude control component (30) is in the closed state. The bidirectional motor (3014) drives the bidirectional hydraulic pump (3013) to rotate in the second direction, so as to drive the medium in the first chamber (1A) to flow through the bidirectional hydraulic pump (3013) and enter the second pipeline (6). At least part of the medium in the second pipeline (6) enters the second chamber (1B) to push the pusher (2) to move away from the second chamber (1B). The medium in the accumulator (20) flows through the first pipeline (5) and enters the bidirectional hydraulic pump (3013) to balance the medium pressure in the first suspension component.

29. The suspension device according to any one of claims 7-28, wherein, The accumulator (20) of the first regulating component is provided with an energy storage chamber (201) and a pressure regulating chamber (202), and the energy storage chamber (201) is connected between the first pipeline (5) and the second pipeline (6); The pressure regulating chamber (202) is equipped with compressed gas, which can be squeezed against the medium in the energy storage chamber (201).

30. The suspension device according to any one of claims 7-29, further satisfying at least one of the following: The first pipeline (5) includes a first pipe (51) and a first valve assembly (52), the first valve assembly (52) being connected between the first pipe (51) and the accumulator (20) of the first regulating assembly, and the first chamber (1A) and the drive unit (301) are both in communication with the first pipe (51); and The second pipeline (6) includes a second pipe (61) and a second valve assembly (62), the second valve assembly (62) being connected between the second pipe (61) and the accumulator (20), and the second chamber (1B) and the drive unit (301) being in communication with the second pipe (61).

31. The suspension device according to claim 30, wherein, The first pipeline (5) includes a first pipe (51) and a first valve assembly (52), and the second pipeline (6) includes a second pipe (61) and a second valve assembly (62); The first valve assembly (52) includes a first damping valve (521) and a first check valve (522) arranged in parallel between the first pipeline (51) and the accumulator (20); The second valve assembly (62) includes a second damping valve (621) and a second check valve (622) arranged in parallel between the second pipe (61) and the accumulator (20).

32. The suspension device according to claim 31, wherein, During the process of the pusher (2) being forced to move toward the second chamber (1B), the medium in the second chamber (1B) is squeezed so that the medium enters the second damping valve (621) through the second pipe (61). Part of the medium entering the second damping valve (621) enters the accumulator (20), and the other part flows through the first check valve (522) and the first pipe (51) in sequence into the first chamber (1A). During the process of the pusher (2) moving away from the second chamber (1B) under force, the medium in the first chamber (1A) is squeezed so that the medium enters the first damping valve (521) through the first pipe (51). The medium entering the first damping valve (521) flows through the second check valve (622) and the second pipe (61) in sequence into the second chamber (1B).

33. The suspension device according to any one of claims 3-32, wherein, The first shock absorber (10) further includes: A tower top assembly (4), said tower top assembly (4) being connected to said pusher (2) and adapted to connect one of a wheel and a vehicle body; and A connecting arm (3) is connected to the pressure cylinder (1) and is adapted to connect the wheel and the other of the vehicle body.

34. The suspension device according to claim 33, wherein, The first damper (10) also includes an elastic element connected between the tower top assembly (4) and the pressure cylinder (1).

35. A vehicle comprising a suspension system according to any one of claims 1-34.

36. The vehicle according to claim 35, further comprising: Body; as well as At least one wheel, said at least one wheel being disposed on the underside of the vehicle body; The suspension system is connected between the vehicle body and at least one wheel.

37. The vehicle according to claim 36, wherein, The at least one wheel includes multiple wheels; The at least one first suspension assembly includes a plurality of first suspension assemblies, any one of the plurality of first suspension assemblies being connected between the vehicle body and a corresponding wheel among the plurality of wheels.

38. The vehicle according to claim 36, further comprising a controller connected to the suspension device, the controller being configured to control the suspension device to replenish the first suspension assembly with the medium in the reservoir (7), or to control the suspension device to discharge the medium in the first suspension assembly to the reservoir (7).

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