Suspension system and vehicle

Abstract

The utility model discloses a suspension system and a vehicle, the suspension system comprises: a shock absorber, the shock absorber comprises a sleeve and a piston, the piston is movably installed in the sleeve to divide a first cavity and a second cavity, and the piston is connected with a piston rod penetrating through the first cavity; the driving pump is connected with the first cavity through a first flow path, the driving pump is connected with the second cavity through a second flow path, and the driving pump is constructed to be capable of switching the flow direction of the liquid medium between the first cavity and the second cavity; the energy accumulator module comprises a first energy storage cavity with variable volume, an air cavity and a second energy storage cavity, the volume of the air cavity is variable due to the variable volume of the first energy storage cavity and / or the second energy storage cavity, an inlet and an outlet of the first energy storage cavity are connected with the first flow path, and an inlet and an outlet of the second energy storage cavity are connected with the second flow path. Therefore, the suspension system can be conveniently switched among different modes, the multiple modes do not influence one another, and the reliability of the suspension system can be improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to a suspension system and a vehicle with the suspension system. Background Art

[0002] When a vehicle is driving on an uneven road, the suspension is vertically stimulated by the road surface, generating up and down motion, and transmitting the motion and force to the vehicle body. The suspension has an active mode and a passive mode. In the passive mode, the suspension can suppress and attenuate the vibration of the vehicle body through the tensile and compressive damping forces of the shock absorbers, and in the active mode, it can reduce the impact of the road surface and suppress the movement of the vehicle body by actively applying independent active forces to the four shock absorbers, thereby achieving excellent vehicle body stability. In the related art, it is usually difficult to switch between different modes of the suspension, and different modes are prone to mutual interference, so there is room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a suspension system that can be easily switched between different modes, and the multiple modes do not affect each other, and the reliability is high.

[0004] According to an embodiment of the utility model, the suspension system includes: a shock absorber, the shock absorber includes a sleeve and a piston, the piston is movably installed in the sleeve to separate a first chamber and a second chamber, and the piston is connected to a piston rod passing through the first chamber; a drive pump, the drive pump is connected to the first chamber through a first flow path, the drive is connected to the second chamber through a second flow path, and the drive pump is configured to switch the flow direction of the liquid medium between the first chamber and the second chamber pumps; an accumulator module, the accumulator module includes a first energy storage chamber with variable volume, an air chamber, and a second energy storage chamber, the volume of the first energy storage chamber and / or the second energy storage chamber is variable so that the volume of the air chamber is variable, the inlet and outlet of the first energy storage chamber are connected to the first flow path, and the inlet and outlet of the second energy storage chamber are connected to the second flow path.

[0005] According to the suspension system of the embodiment of the utility model, the working state of the driving pump can be adjusted to achieve convenient switching of the suspension system between different modes, and the multiple modes do not affect each other, which is beneficial to improving the reliability of the suspension system.

[0006] According to the suspension system of some embodiments of the present invention, the first flow path and the second flow path each include a first sub-flow path and a second sub-flow path in which the liquid medium flows in opposite directions.

[0007] According to the suspension system of some embodiments of the present invention, the liquid medium of the first sub-flow path flows from the drive pump to the first chamber or the second chamber, and the liquid medium of the second sub-flow path flows from the first chamber or the second chamber to the drive pump.

[0008] According to the suspension system of some embodiments of the present invention, the inlet and outlet of the first energy storage chamber are connected to the second sub-flow path of the first flow path.

[0009] According to the suspension system of some embodiments of the present utility model, a first one-way valve is provided between the connection between the first energy storage chamber and the second sub-flow path and the driving pump, and the first one-way valve guides liquid unidirectionally toward the driving pump.

[0010] According to the suspension system of some embodiments of the present invention, the inlet and outlet of the second energy storage chamber are connected to the second sub-flow path of the second flow path.

[0011] According to the suspension system of some embodiments of the present utility model, a first one-way valve is provided between the connection between the second energy storage chamber and the second sub-flow path and the driving pump, and the first one-way valve guides liquid unidirectionally toward the driving pump.

[0012] According to the suspension system of some embodiments of the present invention, the first sub-flow path is provided with a second one-way valve for controlling the one-way flow of the liquid medium toward the shock absorber; the accumulator module is connected to the second sub-flow path, and the second sub-flow path is provided with a third one-way valve for controlling the one-way flow of the liquid medium toward the accumulator module.

[0013] According to the suspension system of some embodiments of the present invention, the second sub-flow path further includes a damping valve for adjusting fluid pressure.

[0014] According to the suspension system of some embodiments of the present invention, in the flow direction of the fluid, the damping valve is located downstream of the third one-way valve.

[0015] According to the suspension system of some embodiments of the present invention, the accumulator module is a three-chamber accumulator.

[0016] According to the suspension system of some embodiments of the utility model, the suspension system includes a passive mode, an active lifting mode and an active pressing mode. In the passive mode, the driving pump stops running, and the accumulator module is directly connected to the first chamber through the first flow path and to the second chamber through the second flow path; in the active lifting mode, the driving pump conveys liquid medium toward the second chamber, and the first chamber conveys liquid medium toward the driving pump; in the active pressing mode, the driving pump conveys liquid medium toward the first chamber, and the second chamber conveys liquid medium toward the driving pump.

[0017] According to the suspension system of some embodiments of the present invention, the shock absorber further includes: a sealing member, wherein the sealing member is sleeved on the outer peripheral wall of the piston to separate the first chamber and the second chamber.

[0018] The utility model also provides a vehicle.

[0019] A vehicle according to an embodiment of the utility model includes: a suspension system according to any one of the above embodiments.

[0020] The advantages of the vehicle and the suspension system compared to the prior art are the same and will not be elaborated here.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 Schematic diagram of a suspension system according to an embodiment of the present utility model.

[0024] Reference numerals:

[0025] Suspension system 100,

[0026] Shock absorber 1, sleeve 11, piston 12, first chamber 13, second chamber 14, piston rod 15,

[0027] Drive pump 2, accumulator module 3, first accumulator chamber 31, air chamber 32, second accumulator chamber 33,

[0028] The first flow path 4, the second flow path 5,

[0029] The first sub-flow path 61 , the second one-way valve 611 , the second sub-flow path 62 , the third one-way valve 621 , the damping valve 622 , and the first one-way valve 623 . DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Hereinafter, a suspension system 100 according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the suspension system 100 according to the embodiment of the utility model includes: a shock absorber 1, a drive pump 2 and an accumulator module 3, the shock absorber 1 includes a sleeve 11 and a piston 12, the piston 12 is movably installed in the sleeve 11 to separate a first chamber 13 and a second chamber 14, and the piston 12 is connected to a piston rod 15 that passes through the first chamber 13; the drive pump 2 is connected to the first chamber 13 through a first flow path 4, and the drive pump 2 is connected to the second chamber 14 through a second flow path 5, and the drive pump 2 is configured to switch the flow direction of the liquid medium between the first chamber 13 and the second chamber 14; the accumulator module 3 includes a first energy storage chamber 31 with variable volume, an air chamber 32 and a second energy storage chamber 33, the volume of the first energy storage chamber 31 and / or the second energy storage chamber 33 is variable so that the volume of the air chamber 32 is variable, the inlet and outlet of the first energy storage chamber 31 are connected to the first flow path 4, and the inlet and outlet of the second energy storage chamber 33 are connected to the second flow path 5.

[0035] In this way, the suspension system 100 can be conveniently switched between different modes without affecting each other, which is beneficial to improving the reliability of the suspension system 100 .

[0036] First, if Figure 1 As shown, the suspension system 100 includes a shock absorber 1, which includes a sleeve 11 and a piston 12. The piston 12 is movably installed in the sleeve 11 along the axial direction. The outer peripheral wall of the piston 12 is used to abut against the inner peripheral wall of the sleeve 11, so that the piston 12 can separate a first chamber 13 and a second chamber 14 with adjustable volumes. The piston 12 is connected to a piston rod 15 on the side facing the first chamber 13. The piston rod 15 can penetrate the first chamber 13 along the axial direction and extend to the outside of the sleeve 11. One end of the piston rod 15 extending out of the sleeve 11 is connected to one of the vehicle body and the wheel, and the sleeve 11 is connected to the other of the vehicle body and the wheel, so that the shock absorber 1 is installed between the vehicle body and the wheel, so that the shock absorber 1 can be used to absorb vibration transmitted from the wheel to the vehicle body.

[0037] The suspension system 100 further includes a driving pump 2 and an accumulator module 3. The first end of the driving pump 2 (reference Figure 1 The a end shown in FIG. 1 is connected to the first chamber 13 through the first flow path 4, and the second end of the driving pump 2 (reference Figure 1 The end b shown in the figure is connected to the second chamber 14 through the second flow path 5, and the driving pump 2 can be used to switch the flow direction of the liquid medium between the first chamber 13 and the second chamber 14. It should be noted that the liquid medium can be lubricating oil.

[0038] The accumulator module 3 includes a first energy storage chamber 31 with variable volume, an air chamber 32, and a second energy storage chamber 33. The air chamber 32 stores gas (which may be an inert gas or air), and the first energy storage chamber 31 and the second energy storage chamber 33 are both used to store liquid media. The volume of the first energy storage chamber 31 and / or the second energy storage chamber 33 is variable so that the volume of the air chamber 32 is variable. The inlet and outlet of the first energy storage chamber 31 are connected to the first flow path 4, and the inlet and outlet of the second energy storage chamber 33 are connected to the second flow path 5.

[0039] Specifically, the volume of the first energy storage chamber 31 can be set to be variable so that the volume of the air chamber 32 can be variable; or, the volume of the second energy storage chamber 33 can be set to be variable so that the volume of the air chamber 32 can be variable; or, the volume of both the first energy storage chamber 31 and the second energy storage chamber 33 can be set to be variable so that the volume of the air chamber 32 can be variable.

[0040] That is to say, the amount of gas in the air cavity 32 remains unchanged, and the air cavity 32 can adjust the volume of the first energy storage chamber 31 and the second energy storage chamber 33 by changing the volume, balancing the pressure of the first energy storage chamber 31 and the pressure of the second energy storage chamber 33, thereby eliminating the pressure difference between the first flow path 4 and the second flow path 5.

[0041] Specifically, the driving pump 2 can be controlled to stop working, so that the first energy storage chamber 31 is connected to the first chamber 13 through the first flow path 4, and the second energy storage chamber 33 is connected to the second chamber 14 through the second flow path 5. In this way, when the wheel moves in the direction away from the vehicle body, the volume of the first chamber 13 decreases and the volume of the second chamber 14 increases, the liquid medium in the first chamber 13 can flow into the first energy storage chamber 31 through the first flow path 4, and the liquid medium in the second energy storage chamber 33 can flow into the second chamber 14 through the second flow path 5; when the wheel moves in the direction close to the vehicle body, the volume of the second chamber 14 decreases and the volume of the first chamber 13 increases, the liquid medium in the second chamber 14 can flow into the second energy storage chamber 33 through the second flow path 5, and the liquid medium in the first energy storage chamber 31 can flow into the first chamber 13 through the first flow path 4. With the reciprocating flow of the liquid medium, the shock absorber 1 can buffer and reduce vibration of the wheel. It should be emphasized that a damping valve 622 is provided on the flow path of the liquid medium. In this way, the passive mode of the suspension system 100 is realized.

[0042] Alternatively, the driving pump 2 can be controlled to pass liquid medium into the second chamber 14 through the second flow path 5, the pressure in the second chamber 14 increases, the volume of the second chamber 14 increases and the volume of the first chamber 13 decreases. Since the piston rod 15 is inserted into the first chamber 13, the liquid medium flowing into the second chamber 14 is more than the liquid medium flowing out of the first chamber 13. The liquid medium in the first chamber 13 and the liquid medium in the first energy storage chamber 31 can flow to the driving pump 2 through the first flow path 4 to balance the flow at both ends of the driving pump 2. In this way, the distance between the vehicle body and the wheel can be increased to lift the vehicle body, thereby realizing the active lifting mode of the suspension system 100.

[0043] Alternatively, the driving pump 2 can be controlled to pass the liquid medium into the first chamber 13 through the first flow path 4, the pressure in the first chamber 13 increases, the volume of the first chamber 13 increases and the volume of the second chamber 14 decreases. Since the piston rod 15 is inserted into the first chamber 13, the liquid medium flowing out of the second chamber 14 is more than the liquid medium flowing into the first chamber 13. The liquid medium flowing out of the second chamber 14 can be divided into two parts, one part flows through the first flow path 4 to flow to the first chamber 13, and the other part can be stored in the second energy storage chamber 33 to balance the flow at both ends of the driving pump 2. In this way, the distance between the wheel and the vehicle body can be shortened to press down the vehicle body, realizing the active downward pressure mode of the suspension system 100.

[0044] Through the above settings, multiple modules can be quickly switched, and multiple modes do not affect each other, which is beneficial to improving the reliability of the suspension system 100. In addition, in the passive mode, the pressure on both sides of the drive pump 2 is equal, and there is no need to lock the drive pump 2, which is beneficial to reducing the development difficulty, and can reduce the back pressure change caused by the volume change of the accumulator module 3, and the wheel center stiffness change is small; while in the active lifting mode and the active pressing mode, the suspension system 100 has a fast response and high system efficiency.

[0045] According to the suspension system 100 of the embodiment of the utility model, the working state of the driving pump 2 can be adjusted to realize convenient switching of the suspension system 100 between different modes, and the multiple modes do not affect each other, which is beneficial to improving the reliability of the suspension system 100.

[0046] In some embodiments of the present invention, the first flow path 4 and the second flow path 5 both include a first sub-flow path 61 and a second sub-flow path 62 with opposite flow directions of the liquid medium.

[0047] For example, refer to Figure 1 As shown, the first flow path 4 can be set to include a first sub-flow path 61 and a second sub-flow path 62. The first sub-flow path 61 and the second sub-flow path 62 of the first flow path 4 are arranged in parallel, and the liquid media of the first sub-flow path 61 and the second sub-flow path 62 flow in opposite directions. The liquid medium can flow into the first cavity 13 through the first sub-flow path 61 of the first flow path 4, and the liquid medium in the first cavity 13 can flow out through the second sub-flow path 62 of the first flow path 4.

[0048] At the same time, the second flow path 5 can be set to include a first sub-flow path 61 and a second sub-flow path 62. The first sub-flow path 61 and the second sub-flow path 62 of the first flow path 4 are arranged in parallel, and the liquid medium in the first sub-flow path 61 and the second sub-flow path 62 flow in opposite directions. The liquid medium can flow into the second cavity 14 through the first sub-flow path 61 of the second flow path 5, and the liquid medium in the second cavity 14 can flow into the second energy storage cavity 33 through the second sub-flow path 62 of the second flow path 5.

[0049] Through the above arrangement, the liquid medium flowing into the shock absorber 1 and the liquid medium flowing out of the shock absorber 1 can have different flow paths, which is beneficial to improving the stability of the suspension system 100 when switching between different modes.

[0050] In some embodiments of the present invention, the liquid medium of the first sub-flow path 61 flows from the driving pump 2 to the first chamber 13 or the second chamber 1 , and the liquid medium of the second sub-flow path 62 flows from the first chamber 13 or the second chamber 14 to the driving pump 2 .

[0051] For example, refer to Figure 1As shown, the liquid medium of the first sub-flow path 61 of the first flow path 4 can be set to flow from the driving pump 2 to the first chamber 13, and the liquid medium of the second sub-flow path 62 of the first flow path 4 can be set to flow from the first chamber 13 to the driving pump 2. At the same time, the liquid medium of the first sub-flow path 61 of the second flow path 5 can be set to flow from the driving pump 2 to the second chamber 14, and the liquid medium of the second sub-flow path 62 of the second flow path 5 can be set to flow from the second chamber 14 to the driving pump 2.

[0052] Through the above arrangement, the flow stability of the liquid medium can be improved, which is beneficial to reducing the fluctuation of the shock absorber 1 when the suspension system 100 switches between different modes.

[0053] In some embodiments of the present invention, Figure 1 As shown, the inlet and outlet of the first energy storage chamber 31 are connected to the second sub-flow path 62 of the first flow path 4, and the liquid medium of the second sub-flow path 62 flows from the shock absorber 1 to the driving pump 2. In this way, when the suspension system 100 is switched to the passive mode, the liquid medium in the first chamber 13 can flow directly into the first energy storage chamber 31 through the second sub-flow path 62 of the first flow path 4, and when the suspension system 100 is switched to the active lifting mode, the liquid medium in the first energy storage chamber 31 can flow directly to the driving pump 2 through the second sub-flow path 62 of the first flow path 4. In this way, the reaction speed of the suspension system 100 can be improved, and the design rationality of the suspension system 100 is improved.

[0054] In some embodiments of the present invention, Figure 1 As shown, a first one-way valve 623 is provided between the connection of the first energy storage chamber 31 and the second sub-flow path 62 and the driving pump 2, and the first one-way valve 623 guides the liquid unidirectionally toward the driving pump 2. Through the above arrangement, when the suspension system 100 is switched to the active downward pressure mode, the liquid medium can be prevented from flowing directly from the first end of the driving pump 2 to the first energy storage chamber 31, which is conducive to improving the operating stability of the suspension system 100.

[0055] In some embodiments of the present invention, Figure 1 As shown, the inlet and outlet of the second energy storage chamber 33 can be connected to the second sub-flow path 62 of the second flow path 5, and the liquid medium of the second sub-flow path 62 flows from the shock absorber 1 to the driving pump 2. In this way, when the suspension system 100 is switched to the passive mode or the active downward pressure mode, the liquid medium in the second chamber 14 can flow directly into the second energy storage chamber 33 through the second sub-flow path 62 of the second flow path 5. In this way, the response speed of the suspension system 100 can be improved, and the design rationality of the suspension system 100 is improved.

[0056] In some embodiments of the present invention, a first one-way valve 623 may be provided between the connection between the second energy storage chamber 33 and the second sub-flow path 62 and the driving pump 2, and the first one-way valve 623 guides the liquid unidirectionally toward the driving pump 2. Through the above arrangement, when the suspension system 100 is switched to the active lifting mode, the liquid medium can be prevented from flowing directly from the second end of the driving pump 2 to the second energy storage chamber 33, which is conducive to improving the operating stability of the suspension system 100.

[0057] In some embodiments of the present invention, the inlet and outlet of the second energy storage chamber 33 are respectively connected to the first sub-flow path 61 and the second sub-flow path 62 of the second flow path 5. Figure 1 As shown, the inlet and outlet of the second energy storage chamber 33 can be connected to the first sub-flow path 61 and the second sub-flow path 62 of the second flow path 5, respectively, and the liquid medium in the second energy storage chamber 33 can flow into the second chamber 14 through the first sub-flow path 61 of the second flow path 5, and the liquid medium in the second chamber 14 can flow into the second energy storage chamber 33 through the second sub-flow path 62 of the second flow path 5. In this way, the flow stability of the liquid medium can be improved, which is conducive to reducing the impact on the accumulator module 3 when the suspension system 100 switches between different modes.

[0058] In some embodiments of the utility model, the first sub-flow path 61 is provided with a second one-way valve 611 for controlling the one-way flow of the liquid medium toward the shock absorber 1; the accumulator module 3 is connected to the second sub-flow path 62, and the second sub-flow path 62 is provided with a third one-way valve 621 for controlling the one-way flow of the liquid medium toward the accumulator module 3.

[0059] Specifically, Figure 1 As shown, a second one-way valve 611 may be provided on the first sub-flow path 61 of the first flow path 4, and the second one-way valve 611 is used to control the one-way flow of the liquid medium toward the first chamber 13 of the shock absorber 1, and a third one-way valve 621 is provided on the second sub-flow path 62 of the first flow path 4, and the third one-way valve 621 is used to control the one-way flow of the liquid medium toward the first energy storage chamber 31 of the accumulator module 3. At the same time, a second one-way valve 611 may be provided on the first sub-flow path 61 of the second flow path 5, and the second one-way valve 611 is used to control the one-way flow of the liquid medium toward the second chamber 14 of the shock absorber 1, and a third one-way valve 621 is provided on the second sub-flow path 62 of the second flow path 5, and the third one-way valve 621 is used to control the one-way flow of the liquid medium toward the second energy storage chamber 33 of the accumulator module 3.

[0060] Through the above arrangement, the flow stability of the liquid medium can be ensured, and the structures of the first flow path 4 and the second flow path 5 can be simplified, thereby improving the design rationality of the suspension system 100.

[0061] In some embodiments of the present invention, Figure 1As shown, the second sub-flow path 62 also includes a damping valve 622 for adjusting the fluid pressure. It should be noted that the damping valve 622 can be set as a throttle valve. Specifically, the damping valve 622 arranged in the first flow path 4 can reduce the pressure of the liquid medium flowing out of the first chamber 13 to reduce the impact on the first energy storage chamber 31 and realize the vibration reduction function; the damping valve 622 arranged in the second flow path 5 can reduce the pressure of the fluid in the second chamber 14 to reduce the impact on the second energy storage chamber 33 and realize the vibration reduction function. In this way, the accumulator module 3 can be prevented from being subjected to high-pressure impact, the operating stability of the accumulator module 3 is improved, and the operating stability of the suspension system 100 is improved.

[0062] In some embodiments of the present invention, Figure 1 As shown, in the flow direction of the fluid, the damping valve 622 can be arranged downstream of the third one-way valve 621. Through the above arrangement, it can be ensured that the liquid medium flowing to the damping valve 622 flows unidirectionally toward the accumulator module 3, so that the damping valve 622 can be constructed as a one-way damping valve, which is conducive to reducing costs.

[0063] In a specific working process, when the suspension system 100 is switched to the passive mode, if the wheel moves in a direction away from the vehicle body, the volume of the first chamber 13 decreases and the volume of the second chamber 14 increases, and the liquid medium in the first chamber 13 can flow through the third one-way valve 621 and the damping valve 622 of the first flow path 4 to flow into the first energy storage chamber 31, and the liquid medium in the second energy storage chamber 33 can flow through the first one-way valve 623 and the second one-way valve 611 of the second flow path 5 to flow into the second chamber 14; and when the wheel moves in a direction close to the vehicle body, the volume of the second chamber 14 decreases and the volume of the first chamber 13 increases, and the liquid medium in the second chamber 14 can flow through the third one-way valve 621 and the damping valve 622 of the second flow path 5 to flow into the second energy storage chamber 33, and the liquid medium in the first energy storage chamber 31 can flow through the first one-way valve 623 and the second one-way valve 611 to flow into the first chamber 13, so that the shock absorber 1 can buffer and reduce vibration of the wheel.

[0064] When the suspension system 100 switches to the active lifting mode, the driving pump 2 can pass the liquid medium from the second end toward the second flow path 5, and the liquid medium flowing into the second flow path 5 can flow into the second chamber 14 through the second one-way valve 611 of the second flow path 5; the liquid medium in the first chamber 13 can flow through the third one-way valve 621, the damping valve 622 and the first one-way valve 623 of the first flow path 4 to flow into the first end of the driving pump 2, and the liquid medium in the first energy storage chamber 31 can flow to the first end of the driving pump 2 through the first one-way valve 623 to balance the flow at both ends of the driving pump 2.

[0065] When the suspension system 100 switches to the active downward pressure mode, the driving pump 2 can pass the liquid medium from the first end to the first flow path 4, and the liquid medium passed into the first flow path 4 can flow into the first chamber 13 through the second one-way valve 611 of the first flow path 4; the liquid medium flowing out of the second chamber 14 can be divided into two parts, one part flows through the third one-way valve 621, the damping valve 622 and the first one-way valve 623 of the second flow path 5 to flow into the second end of the driving pump 2, and the other part flows through the third one-way valve 621 and the damping valve 622 of the second flow path 5 to flow into the second energy storage chamber 33, so as to balance the flow at both ends of the driving pump 2.

[0066] Through the above arrangement, the suspension system 100 can be stably switched between different modes, which is beneficial to improving the flow stability of the liquid medium in the suspension system 100 and improving the reliability of the suspension system 100.

[0067] In some embodiments of the present invention, the accumulator module 3 is configured as a three-chamber accumulator, which includes a first accumulator chamber 31, an air chamber 32, and a second accumulator chamber 33, and the air chamber 32 is located between the first accumulator chamber 31 and the second accumulator chamber 33. This helps reduce the structural complexity of the suspension system 100.

[0068] Of course, the present invention is not limited thereto, and the accumulator module 3 may also include two accumulators, one of the two accumulators is provided with a first accumulator chamber 31 and a gas chamber, and the other is provided with a second accumulator chamber 33 and a gas chamber, and the gas chambers of the two accumulators are connected to form a gas chamber 32. Thus, the cost can be reduced.

[0069] In some embodiments of the present invention, Figure 1 As shown, the suspension system 100 may be configured to include a passive mode, an active lifting mode, and an active pressing mode.

[0070] In the passive mode, the driving pump 2 stops running, and the accumulator module 3 is directly connected to the first chamber 13 through the first flow path 4 and is connected to the second chamber 14 through the second flow path 5. In this way, when the wheel moves in the direction away from the vehicle body, the volume of the first chamber 13 decreases and the volume of the second chamber 14 increases, the liquid medium in the first chamber 13 can flow into the first energy storage chamber 31 through the first flow path 4, and the liquid medium in the second energy storage chamber 33 can flow into the second chamber 14 through the second flow path 5; when the wheel moves in the direction close to the vehicle body, the volume of the second chamber 14 decreases and the volume of the first chamber 13 increases, the liquid medium in the second chamber 14 can flow into the second energy storage chamber 33 through the second flow path 5, and the liquid medium in the first energy storage chamber 31 can flow into the first energy storage chamber 31 through the first flow path 4. With the reciprocating flow of the liquid medium, the shock absorber 1 can buffer and reduce the vibration of the wheel.

[0071] In the active lifting mode, the driving pump 2 delivers liquid medium toward the second chamber 14, the pressure in the second chamber 14 increases, the volume of the second chamber 14 increases, and the volume of the first chamber 13 decreases, and the first chamber 13 delivers liquid medium toward the driving pump 2. Since the piston rod 15 is inserted into the first chamber 13, the liquid medium flowing into the second chamber 14 is more than the liquid medium flowing out of the first chamber 13, and the liquid medium in the first energy storage chamber 31 can flow to the driving pump 2 through the first flow path 4, so that the flow at both ends of the driving pump 2 is balanced.

[0072] In the active downward pressure mode, the driving pump 2 delivers the liquid medium toward the first chamber 13, the pressure in the first chamber 13 increases, the volume of the first chamber 13 increases, and the volume of the second chamber 14 decreases, and the second chamber 14 delivers the liquid medium toward the driving pump 2. Since the piston rod 15 is provided in the first chamber 13, the liquid medium flowing out of the second chamber 14 is more than the liquid medium flowing into the first chamber 13, and the excess liquid medium can be stored in the second energy storage chamber 33 to balance the flow at both ends of the driving pump 2.

[0073] Through the above configuration, quick switching of various modules can be achieved, and the suspension system 100 can operate stably in different modes, which is beneficial to improving the reliability of the suspension system 100.

[0074] In some embodiments of the utility model, the shock absorber 1 further includes: a seal, which is in the shape of a sleeve, and is disposed on the outer peripheral wall of the piston 12, and the outer peripheral wall of the seal is used to abut against the inner peripheral wall of the sleeve 11 to separate the first cavity 13 and the second cavity 14. Specifically, the seal can be made of elastic materials such as rubber. Through the above arrangement, the sealing between the first cavity 13 and the second cavity 14 can be improved to avoid leakage of the liquid medium, thereby improving the working reliability of the suspension system 100.

[0075] The utility model also provides a vehicle.

[0076] A vehicle according to an embodiment of the present utility model includes: a suspension system 100 according to any one of the above embodiments.

[0077] According to the vehicle of the embodiment of the utility model, the working state of the drive pump 2 can be adjusted to realize convenient switching of the suspension system 100 between different modes, and the multiple modes do not affect each other, which is beneficial to improving the reliability of the suspension system 100 and enhancing the overall performance of the vehicle.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0079] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A suspension system (100), characterized in that: include: A shock absorber (1), the shock absorber (1) comprising a sleeve (11) and a piston (12), the piston (12) being movably mounted in the sleeve (11) to separate a first chamber (13) and a second chamber (14), and the piston (12) being connected to a piston rod (15) penetrating the first chamber (13); a driving pump (2), the driving pump (2) being connected to the first chamber (13) via a first flow path (4), the driving pump (2) being connected to the second chamber (14) via a second flow path (5), the driving pump (2) being configured to switch the flow direction of the liquid medium between the first chamber (13) and the second chamber (14); An accumulator module (3), the accumulator module (3) comprising a first energy storage chamber (31) with variable volumes, an air chamber (32) and a second energy storage chamber (33), the volumes of the first energy storage chamber (31) and / or the second energy storage chamber (33) being variable so that the volume of the air chamber (32) is variable, the inlet and outlet of the first energy storage chamber (31) being connected to the first flow path (4) and the inlet and outlet of the second energy storage chamber (33) being connected to the second flow path (5).

2. The suspension system (100) according to claim 1, characterized in that: The first flow path (4) and the second flow path (5) both include a first sub-flow path (61) and a second sub-flow path (62) in which the liquid medium flows in opposite directions.

3. The suspension system (100) according to claim 2, characterized in that: The liquid medium of the first sub-flow path (61) flows from the driving pump (2) to the first chamber (13) or the second chamber (14), and the liquid medium of the second sub-flow path (62) flows from the first chamber (13) or the second chamber (14) to the driving pump (2).

4. The suspension system (100) according to claim 2, characterized in that: The inlet and outlet of the first energy storage chamber (31) are connected to the second sub-flow path (62) of the first flow path (4).

5. The suspension system (100) according to claim 4, characterized in that: A first one-way valve (623) is provided between the connection point between the first energy storage chamber (31) and the second sub-flow path (62) and the driving pump (2), and the first one-way valve (623) guides liquid in a one-way direction toward the driving pump (2).

6. The suspension system (100) according to claim 2, characterized in that: The inlet and outlet of the second energy storage chamber (33) are connected to the second sub-flow path (62) of the second flow path (5).

7. The suspension system (100) according to claim 6, characterized in that: A first one-way valve (623) is provided between the connection point between the second energy storage chamber (33) and the second sub-flow path (62) and the driving pump (2), and the first one-way valve (623) guides liquid in a one-way direction toward the driving pump (2).

8. The suspension system (100) according to claim 2, characterized in that: The first sub-flow path (61) is provided with a second one-way valve (611) for controlling the one-way flow of the liquid medium toward the shock absorber (1); The accumulator module (3) is connected to the second sub-flow path (62), and the second sub-flow path (62) is provided with a third one-way valve (621) for controlling the one-way flow of liquid medium toward the accumulator module (3).

9. The suspension system (100) according to claim 8, characterized in that: The second sub-flow path (62) further includes a damping valve (622) for adjusting fluid pressure.

10. The suspension system (100) according to claim 9, characterized in that: In the flow direction of the fluid, the damping valve (622) is located downstream of the third one-way valve (621).

11. The suspension system (100) according to claim 1, characterized in that: The accumulator module (3) is a three-chamber accumulator.

12. The suspension system (100) according to any one of claims 1 to 11, characterized in that: The suspension system (100) comprises a passive mode, an active lifting mode and an active pressing mode, In the passive mode, the driving pump (2) stops running, and the accumulator module (3) is directly connected to the first chamber (13) through the first flow path (4) and is connected to the second chamber (14) through the second flow path (5); In the active lifting mode, the driving pump (2) delivers liquid medium toward the second chamber (14), and the first chamber (13) delivers liquid medium toward the driving pump (2); In the active downward pressure mode, the driving pump (2) delivers liquid medium toward the first chamber (13), and the second chamber (14) delivers liquid medium toward the driving pump (2).

13. The suspension system (100) according to claim 1, characterized in that The shock absorber (1) further comprises: a sealing member, the sealing member being disposed on the outer peripheral wall of the piston (12) to separate the first chamber (13) from the second chamber (14).

14. A vehicle, characterized in that: include: The suspension system (100) according to any one of claims 1-13.

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