Suspension system and vehicle

Abstract

The embodiment of the utility model provides a suspension system and a vehicle, and the suspension system comprises an elastic element, two ends of which are respectively connected with a sprung mass and an unsprung mass; the two ends of the damping mechanism are connected with the sprung mass and the unsprung mass respectively; the damping mechanism is provided with a cavity filled with a medium; an energy accumulator; an energy recovery mechanism; the first oil way is configured to enable a medium in the cavity to flow to the energy accumulator through the energy recovery mechanism; the second oil way is configured to enable the medium in the energy accumulator to flow to the cavity through the energy recovery mechanism; the first oil way and the second oil way are consistent in flow direction of media flowing through the energy recovery mechanism. In the embodiment of the utility model, the vibration mechanical energy can be converted into the electric energy to be recycled, and the economical efficiency and the driving range of the vehicle can be improved.

Description

Technical Field

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

[0002] The function of the suspension system is to transfer the force or torque between the sprung mass and the wheels, cushion the impact of road bumps on the vehicle body, and reduce the vibration of the vehicle body. The traditional suspension system converts the vibration mechanical energy into heat through the shock absorber and dissipates it. Studies have shown that for urban road conditions, this part of the dissipated energy accounts for about % of the vehicle's driving energy. Especially for heavy-duty off-road vehicles, when the vehicle is driving in off-road conditions with poor road conditions, the dissipated energy will account for a higher proportion of the vehicle's driving energy, resulting in energy loss, reducing the vehicle's cruising range, and being detrimental to the vehicle's economy. Utility Model Content

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a suspension system and a vehicle that overcome the above problems or at least partially solve the above problems.

[0004] In order to solve the above problems, the embodiment of the utility model discloses a suspension system, including:

[0005] A shock absorbing mechanism, wherein two ends of the shock absorbing mechanism are respectively used to connect with the sprung mass and the unsprung mass; the shock absorbing mechanism has a cavity filled with a medium;

[0006] Accumulator;

[0007] Energy recovery mechanism;

[0008] a first oil circuit, wherein the first oil circuit is configured so that the medium in the cavity flows to the accumulator via the energy recovery mechanism;

[0009] a second oil circuit, the second oil circuit being configured so that the medium in the accumulator flows to the cavity through the energy recovery mechanism;

[0010] The first oil circuit and the second oil circuit have the same flow direction of the medium flowing through the energy recovery mechanism.

[0011] Optionally, the energy recovery mechanism comprises at least one liquid inlet and at least one liquid outlet;

[0012] The first oil circuit and the second oil circuit are respectively connected to the liquid inlet, so that the energy recovery mechanism receives the medium in the cavity or the medium in the accumulator;

[0013] The first oil circuit and the second oil circuit are respectively connected to the liquid outlet, so that the medium passing through the energy recovery mechanism flows to the accumulator through the first oil circuit, and the medium passing through the energy recovery mechanism flows to the cavity through the second oil circuit.

[0014] Optionally, the first oil circuit includes a first sub-oil circuit and a second sub-oil circuit, and the second oil circuit includes a third sub-oil circuit and a fourth sub-oil circuit;

[0015] One end of the first sub-oil path is connected to the cavity, and the other end is connected to one of the liquid inlets of the energy recovery mechanism;

[0016] One end of the second sub-oil circuit is connected to one of the liquid outlets of the energy recovery mechanism, and the other end is connected to the accumulator;

[0017] One end of the third sub-oil channel is connected to the energy recovery mechanism, and the other end is connected to the cavity;

[0018] One end of the fourth oil sub-channel is connected to the accumulator, and the other end is connected to the energy recovery mechanism.

[0019] Optionally, the energy recovery mechanism includes a liquid inlet;

[0020] One end of the fourth sub-oil circuit away from the accumulator is connected to the first sub-oil circuit, and the medium in the cavity and the accumulator enters the energy recovery mechanism through the first sub-oil circuit.

[0021] Optionally, the suspension system comprises a first one-way valve and a fourth one-way valve, and a connection point between the first sub-oil circuit and the fourth sub-oil circuit is a first connection point;

[0022] The first one-way valve is arranged in the first sub-oil circuit and between the first connection point and the cavity. The first one-way valve is connected from the cavity to the energy recovery mechanism. The first one-way valve is used to control the medium in the cavity to flow into the energy recovery mechanism.

[0023] The fourth one-way valve is arranged in the fourth sub-oil circuit and between the first connection point and the accumulator. The fourth one-way valve is connected from the accumulator to the energy recovery mechanism. The fourth one-way valve is used to control the medium in the accumulator to flow into the energy recovery mechanism.

[0024] Optionally, the first sub-oil path includes a first end and a second end, the first end is connected to the cavity, and the second end is connected to the liquid inlet;

[0025] An end of the third sub-oil passage away from the energy recovery mechanism is connected to the first end, and a connection point between the third sub-oil passage and the first sub-oil passage is a second connection point;

[0026] An end of the fourth oil sub-circuit away from the accumulator is connected to the second end;

[0027] The first one-way valve is disposed between the first connection and the second connection.

[0028] Optionally, the fourth sub-oil circuit includes a third end and a fourth end, the third end is connected to the first sub-oil circuit, the fourth end is connected to the second sub-oil circuit, and the connection between the fourth end and the second sub-oil circuit is the third connection;

[0029] The fourth one-way valve is disposed between the first connection point and the third connection point.

[0030] Optionally, the energy recovery mechanism comprises two liquid inlets;

[0031] The first sub-oil circuit is connected to one of the liquid inlets, and the fourth sub-oil circuit is connected to the other liquid inlet.

[0032] Optionally, the energy recovery mechanism includes a liquid outlet;

[0033] One end of the third sub-oil passage away from the cavity is connected to the second sub-oil passage, and the medium in the energy recovery mechanism flows to the third sub-oil passage through the second sub-oil passage.

[0034] The suspension system further includes a second one-way valve and a third one-way valve, and the connection between the second sub-oil circuit and the fourth sub-oil circuit is a fourth connection;

[0035] The second one-way valve is arranged in the second sub-oil circuit and between the fourth connection point and the accumulator, and the second one-way valve is connected from the energy recovery mechanism to the accumulator to control the medium in the energy recovery mechanism to flow to the accumulator;

[0036] The third one-way valve is arranged in the third sub-oil circuit and between the fourth connection point and the cavity. The third one-way valve is connected from the energy recovery mechanism to the cavity. The third one-way valve is used to control the medium in the energy recovery mechanism to flow to the cavity.

[0037] Optionally, the energy recovery mechanism comprises two liquid outlets;

[0038] The second sub-oil path is connected to one of the liquid outlets, and the third sub-oil path is connected to the other liquid outlet.

[0039] Optionally, the shock absorbing mechanism comprises a piston movable in the cavity, and the piston divides the cavity into a first cavity and a second cavity;

[0040] The first cavity is connected to the first oil circuit and the second oil circuit respectively.

[0041] Optionally, the shock absorbing mechanism has a compression stroke and an extension stroke;

[0042] The piston moves along a first direction and compresses the first cavity, the damping mechanism switches to the compression stroke, and the medium in the first cavity flows into the energy recovery mechanism and the accumulator through the first oil passage;

[0043] The piston moves in a second direction and compresses the second cavity, the damping mechanism switches to the extension stroke, and the medium in the accumulator flows into the energy recovery mechanism and the first cavity through the second oil passage, wherein the second direction is opposite to the first direction.

[0044] Optionally, a damping hole is provided on the piston, and the damping hole connects the first cavity and the second cavity.

[0045] Optionally, the suspension system comprises an elastic element, and two ends of the elastic element are respectively used to connect with the sprung mass and the unsprung mass.

[0046] Optionally, the energy recovery mechanism comprises a hydraulic motor, a generator and a battery connected in sequence;

[0047] The hydraulic motor is arranged in the first oil circuit and the second oil circuit;

[0048] The medium in the cavity flows to the accumulator through the hydraulic motor;

[0049] The medium in the accumulator flows to the chamber through the hydraulic motor.

[0050] Optionally, the shock absorbing mechanism further comprises a piston rod and a cylinder body enclosing the cavity;

[0051] One end of the piston rod is disposed in the cylinder and connected to the piston;

[0052] The other end of the piston rod extends out of one end of the cylinder and is used to be connected to the sprung mass, and the other end of the cylinder is used to be connected to the unsprung mass.

[0053] In a second aspect, an embodiment of the utility model further discloses a vehicle, comprising: a sprung mass, an unsprung mass and the above suspension system;

[0054] The suspension system is disposed between the sprung mass and the unsprung mass.

[0055] The utility model embodiment includes the following advantages:

[0056] In the embodiment of the utility model, since the first oil circuit is configured so that the medium in the cavity flows to the accumulator through the energy recovery mechanism, and the second oil circuit is configured so that the medium in the accumulator flows to the cavity through the energy recovery mechanism, when the unsprung mass vibrates, when the pressure in the cavity is high, the pressure energy can be transmitted to the energy recovery mechanism for conversion to obtain electrical energy for storage, or the excess pressure energy can be transmitted to the accumulator for storage; when the pressure in the cavity is low, the accumulator can transmit the pressure energy to the energy recovery mechanism for conversion to obtain electrical energy for storage. In the embodiment of the utility model, the vibration mechanical energy can be converted into electrical energy for recycling, which can improve the economy and driving range of the vehicle. Moreover, the first oil circuit and the second oil circuit have the same flow direction of the medium flowing through the energy recovery mechanism, which can also improve the convenience of the energy recovery mechanism in generating electricity, thereby improving the energy recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 It is a partial structural schematic diagram of a suspension system of the utility model;

[0058] Figure 2 It is a structural schematic diagram of a suspension system of the utility model;

[0059] Figure 3 This is a working principle diagram of a compression stroke of a shock absorbing mechanism of the utility model;

[0060] Figure 4 The utility model is a working principle diagram of the extension stroke of a shock absorbing mechanism.

[0061] Description of reference numerals:

[0062] 11-sprung mass, 12-unsprung mass, 13-matching of tire and ground, 2-elastic element, 3-shock absorbing mechanism, 31-cavity, 311-first cavity, 312-second cavity, 32-piston, 321-damping hole, 33-piston rod, 34-buffer body, 35-cylinder, 4-energy recovery mechanism, 41-hydraulic motor, 42-generator, 43-converter, 44-battery, 5-accumulator, 61-first oil circuit, 611-first sub-oil circuit, 612-second sub-oil circuit, 62-second oil circuit, 621-third sub-oil circuit, 622-fourth sub-oil circuit, 71-first one-way valve, 72-second one-way valve, 73-third one-way valve, 74-fourth one-way valve, 8-installation ear. DETAILED DESCRIPTION

[0063] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0064] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] 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.

[0067] One of the core concepts of the embodiment of the utility model is to disclose a suspension system, which can be set in a vehicle, or can also be used in combination with other active suspension technologies. The suspension system can be set between the sprung mass 11 and the unsprung mass 12, and is a general term for all force transmission connection devices between the sprung mass 11 and the unsprung mass 12, wherein the vehicle can be divided into two parts, the sprung mass 11 and the unsprung mass 12. In the suspension system of a ground vehicle, the unsprung mass 12 (or unsprung weight) refers to the mass of the suspension, the wheels or rails (if applicable), and other parts directly connected thereto, excluding other parts supported by the suspension; the sprung mass 11 is the mass of the rest of the vehicle, generally including the frame, power system, transmission, occupants, etc.

[0068] Optionally, the suspension system may include an elastic element 2, two ends of the elastic element 2 are respectively used to connect with the sprung mass 11 and the unsprung mass 12, and the elastic element 2 can play a buffering role in the suspension system.

[0069] Specifically, the elastic element 2 may be a compression spring or a tension spring, etc., and the material of the elastic element 2 may be steel to increase the structural strength of the elastic element 2 .

[0070] Combination Figure 1 and Figure 2 As shown, the suspension system may specifically include: a shock absorbing mechanism 3, wherein both ends of the shock absorbing mechanism 3 are respectively used to connect with the sprung mass 11 and the unsprung mass 12; the shock absorbing mechanism 3 has a cavity 31 filled with a medium; an accumulator 5; an energy recovery mechanism 4; a first oil circuit 61, wherein the first oil circuit 61 is configured so that the medium in the cavity 31 flows to the accumulator 5 via the energy recovery mechanism 4; a second oil circuit 62, wherein the second oil circuit 62 is configured so that the medium in the accumulator 5 flows to the cavity 31 via the energy recovery mechanism 4; the first oil circuit 61 and the second oil circuit 62 are consistent in the flow direction of the medium flowing through the energy recovery mechanism 4.

[0071] In the embodiment of the utility model, since the first oil circuit 61 is configured so that the medium in the cavity 31 flows to the accumulator 5 through the energy recovery mechanism 4, and the second oil circuit 62 is configured so that the medium in the accumulator 5 flows to the cavity 31 through the energy recovery mechanism 4, when the unsprung mass 12 vibrates, when the pressure in the cavity 31 is high, the pressure energy can be transmitted to the energy recovery mechanism 4 for conversion to obtain electrical energy for storage, and the excess pressure energy can also be transmitted to the accumulator 5 for storage; when the pressure in the cavity 31 is low, the accumulator 5 can transmit the pressure energy to the energy recovery mechanism 4 for conversion to obtain electrical energy for storage. In the embodiment of the utility model, the vibration mechanical energy can be converted into electrical energy for recycling, which can improve the economy and driving range of the vehicle. Moreover, the first oil circuit 61 and the second oil circuit 62 have the same flow direction of the medium flowing through the energy recovery mechanism 4, which can also improve the convenience of the energy recovery mechanism 4 in generating electricity, thereby improving the energy recovery efficiency.

[0072] Specifically, the suspension system may include a shock absorbing mechanism 3, the two ends of which are respectively connected to the sprung mass 11 and the unsprung mass 12, and the shock absorbing mechanism 3 may provide a shock absorbing function in the suspension system. The shock absorbing mechanism 3 may have a cavity 31 filled with a medium.

[0073] Specifically, the accumulator 5 can be used to store a medium. Specifically, the embodiment of the utility model is only described by taking the medium as liquid oil as an example, and the corresponding accumulator 5 can be a hydraulic accumulator.

[0074] Specifically, the suspension system also includes an energy recovery mechanism 4, which converts pressure energy into electrical energy for storage, and can effectively recover vibration mechanical energy, thereby suppressing the vibration of the vehicle and improving the economy and driving range of the vehicle.

[0075] Specifically, the suspension system may include a first oil circuit 61 and a second oil circuit 62. The first oil circuit 61 may be configured so that the medium in the cavity 31 flows to the accumulator 5 via the energy recovery mechanism 4, that is, the first oil circuit 61 may respectively connect the cavity 31, the energy recovery mechanism 4 and the accumulator 5, so that the medium in the cavity 31 may first flow to the energy recovery mechanism 4 and then flow to the accumulator 5.

[0076] Specifically, the second oil circuit 62 can be configured so that the medium in the accumulator 5 flows to the cavity 31 via the energy recovery mechanism 4, that is, the second oil circuit 62 can respectively connect the cavity 31, the energy recovery mechanism 4 and the accumulator 5, so that the medium in the accumulator 5 can first flow to the energy recovery mechanism 4 and then flow to the cavity 31.

[0077] Specifically, the first oil circuit 61 and the second oil circuit 62 have the same flow direction of the medium flowing through the energy recovery mechanism 4, so that the medium flows into the energy recovery mechanism 4 from the same side of the energy recovery mechanism 4, which is convenient for simplifying the internal structure of the energy recovery mechanism 4, and can improve the convenience of converting electrical energy by the energy recovery mechanism 4 and improve the conversion efficiency.

[0078] Furthermore, when the pressure in the cavity 31 is relatively high, the medium in the cavity 31 can be discharged to the energy recovery mechanism 4, so that the energy recovery mechanism 4 can convert the pressure energy into electrical energy for storage, wherein the excess medium can be discharged to the accumulator 5 again to store the medium in the accumulator 5. When the pressure in the cavity 31 is relatively low, the medium in the accumulator 5 can flow to the energy recovery mechanism 4 for electrical energy conversion, and a part of the medium can flow back to the cavity 31. In this way, the unsprung mass 12 can generate vibration mechanical energy during the vibration process, and the vibration mechanical energy can be transmitted to the shock absorbing mechanism 3 to form pressure energy, and then the energy recovery mechanism 4 converts the pressure energy into electrical energy for storage, which can realize the effective recovery of the vibration mechanical energy, thereby suppressing the vibration of the vehicle and improving the economy and driving range of the vehicle.

[0079] Specifically, Figure 1 and Figure 2 As shown, the cooperation between the tire and the ground 13 illustrates that when the wheel encounters an uneven road surface, the unsprung mass 12 is driven to vibrate up and down to generate vibration mechanical energy; Figure 3 As shown, the elastic element 2 is compressed to absorb vibration energy, the shock absorbing mechanism 3 performs a compression stroke, and a high pressure is formed in the cavity 31. The medium in the cavity 31 can flow to the energy recovery mechanism 4, so that the energy recovery mechanism 4 can convert the pressure energy into electrical energy for storage.

[0080] like Figure 4 As shown, the elastic element 2 is reset, the shock absorbing mechanism 3 performs an extension stroke, a low pressure is formed in the cavity 31, and the medium in the accumulator 5 can flow to the energy recovery mechanism 4 to transmit pressure energy, so that the energy recovery mechanism 4 can convert the pressure energy into electrical energy for storage.

[0081] Optionally, the energy recovery mechanism 4 includes at least one liquid inlet; the first oil circuit 61 and the second oil circuit 62 can be connected to the liquid inlet respectively, that is, the energy recovery mechanism 4 is connected to the first oil circuit 61 and the second oil circuit 62 respectively through at least one liquid inlet, so that the energy recovery mechanism 4 receives the medium in the cavity 31 or the medium in the accumulator 5, which can improve the reliability of the energy recovery mechanism 4 in converting electrical energy.

[0082] Optionally, the energy recovery mechanism 4 includes at least one liquid outlet; the first oil circuit 61 and the second oil circuit 62 can be connected to the liquid outlet respectively, that is, energy recovery is connected to the first oil circuit 61 and the second oil circuit 62 respectively through at least one liquid outlet, so that the medium of the energy recovery mechanism 4 flows to the accumulator 5 or the cavity 31, which can improve the reliability of recovering excess medium.

[0083] Specifically, the number of liquid inlets of the energy recovery mechanism 4 can be one or two, and the number of liquid outlets can be one or two. In an embodiment of the utility model, the suspension system may include one liquid inlet and one liquid outlet, or one liquid inlet and two liquid outlets, or two liquid inlets and one liquid outlet, or two liquid inlets and two liquid outlets.

[0084] Optionally, the first oil circuit 61 may include a first sub-oil circuit 611 and a second sub-oil circuit 612; one end of the first sub-oil circuit 611 may be connected to the cavity 31, and the other end may be connected to the energy recovery mechanism 4; one end of the second sub-oil circuit 612 may be connected to the energy recovery mechanism 4, and the other end may be connected to the accumulator 5.

[0085] In an embodiment of the utility model, the medium in the cavity 31 can flow into the energy recovery mechanism 4 through the first sub-oil path 611, and then flow to the accumulator 5 through the second sub-oil path 612. In this way, the energy recovery mechanism 4 can convert more pressure energy into electrical energy, and the excess pressure energy will flow into the accumulator 5 for storage.

[0086] Optionally, the second oil circuit 62 can also include a third sub-oil circuit 621 and a fourth sub-oil circuit 622; one end of the third sub-oil circuit 621 is connected to the energy recovery mechanism 4, and the other end is connected to the cavity 31; one end of the fourth sub-oil circuit 622 is connected to the accumulator 5, and the other end is connected to the energy recovery mechanism 4.

[0087] In an embodiment of the utility model, the medium in the accumulator 5 can first be transmitted to the energy recovery mechanism 4 through the fourth sub-oil path 622, and then flow back to the cavity 31 through the third sub-oil path 621, so that the energy recovery mechanism 4 can convert more pressure energy into electrical energy.

[0088] Specifically, when the cavity 31 is at low pressure, the medium in the accumulator 5 can first be transmitted to the energy recovery mechanism 4 through the fourth sub-oil circuit 622, and then flow back to the cavity 31 through the third sub-oil circuit 621. As much pressure energy as possible can be transmitted to the energy recovery mechanism 4, and then the remaining pressure energy can be transmitted to the cavity 31, which can effectively improve the energy recovery efficiency.

[0089] Specifically, when the cavity 31 is under high pressure, the medium in the cavity 31 is first transmitted to the energy recovery mechanism 4 through the first sub-oil circuit 611, and then transmitted to the accumulator 5 through the second sub-oil circuit 612. As much pressure energy as possible can be transmitted to the energy recovery mechanism 4, and then the remaining pressure energy can be transmitted to the accumulator 5 for storage, which can effectively improve the energy recovery efficiency.

[0090] Optionally, the energy recovery mechanism 4 may include a liquid inlet; the fourth sub-oil circuit 622 is connected to the first sub-oil circuit 611 at one end away from the accumulator 5, and the medium in the cavity 31 and the accumulator 5 can enter the energy recovery mechanism 4 through the first sub-oil circuit 611.

[0091] In an embodiment of the utility model, the fourth sub-oil circuit 622 is connected to the first sub-oil circuit 611 at one end away from the accumulator 5, so that the fourth sub-oil circuit 622 and the first sub-oil circuit 611 share a section, and the shared section is connected to the energy recovery mechanism 4, which can improve the reliability of the medium in the cavity 31 and the accumulator 5 flowing to the energy recovery mechanism 4 in the same direction; it is convenient to simplify the structural layout difficulty of the energy recovery mechanism 4, which can reduce the structural cost of the energy recovery mechanism 4 and further improve the energy recovery efficiency; the medium in the cavity 31 and the accumulator 5 can enter the energy recovery mechanism 4 from the same liquid inlet, which can reduce the number of liquid inlets of the energy recovery mechanism 4; the layout length of the fourth sub-oil circuit 622 can be reduced, and the structure of the suspension system can be simplified.

[0092] Optionally, the suspension system may include a first one-way valve 71 and a fourth one-way valve 74, and the connection between the first sub-oil circuit 611 and the fourth sub-oil circuit 622 is the first connection a; the first one-way valve 71 may be arranged in the first sub-oil circuit 611 and arranged between the first connection a and the cavity 31, the first one-way valve 71 is connected from the cavity 31 to the energy recovery mechanism 4, and the first one-way valve 71 is used to control the medium in the cavity 31 to flow into the energy recovery mechanism 4; the fourth one-way valve 74 is arranged in the fourth sub-oil circuit 622 and arranged between the first connection a and the accumulator 5, the fourth one-way valve 74 is connected from the accumulator 5 to the energy recovery mechanism 4, and the fourth one-way valve 74 is used to control the medium in the accumulator 5 to flow into the energy recovery mechanism 4.

[0093] In the embodiment of the utility model, when the first one-way valve 71 controls the medium in the cavity 31 to flow into the energy recovery mechanism 4, the fourth one-way valve 74 can block the medium from flowing to the accumulator 5; when the fourth one-way valve 74 controls the medium in the accumulator 5 to flow into the energy recovery mechanism 4, the first one-way valve 71 can block the medium from flowing to the cavity 31, thereby improving the reliability of the energy recovery mechanism 4 receiving the medium in the cavity 31 and the accumulator 5 respectively.

[0094] Optionally, the first sub-oil circuit 611 includes a first end and a second end, the first end is connected to the cavity 31, and the second end is connected to the liquid inlet; the end of the third sub-oil circuit 621 away from the energy recovery mechanism 4 is connected to the first end, and the connection between the third sub-oil circuit 621 and the first sub-oil circuit 611 is the second connection b; the end of the fourth sub-oil circuit 622 away from the accumulator 5 is connected to the second end; the first one-way valve 71 is arranged between the first connection a and the second connection b.

[0095] In the embodiment of the utility model, the first one-way valve 71 is arranged between the first connection a and the second connection b, which can improve the reliability of the first one-way valve 71 in introducing the medium in the cavity 31 into the energy recovery mechanism 4.

[0096] Optionally, the fourth sub-oil circuit 622 may include a third end and a fourth end, the third end is connected to the first sub-oil circuit 611, the fourth end is connected to the second sub-oil circuit 612, and the connection between the fourth end and the second sub-oil circuit 612 is the third connection c; the fourth one-way valve 74 is arranged between the first connection a and the third connection c.

[0097] In the embodiment of the utility model, the fourth one-way valve 74 is arranged between the first connection a and the third connection c, which can improve the reliability of the fourth one-way valve 74 in introducing the medium in the accumulator 5 into the energy recovery mechanism 4.

[0098] Optionally, the energy recovery mechanism 4 may include a liquid outlet; the end of the third sub-oil circuit 621 away from the cavity 31 may be connected to the second sub-oil circuit 612, and the medium in the energy recovery mechanism 4 flows to the third sub-oil circuit 621 through the second sub-oil circuit 612, and then flows to the cavity 31 through the third sub-oil circuit 621, and the energy recovery mechanism 4 may also flow to the accumulator 5 through the second sub-oil circuit 612, thereby improving the reliability of the medium in the energy recovery mechanism 4 flowing to the accumulator 5 or the cavity 31.

[0099] Specifically, one end of the third sub-oil passage 621 away from the cavity 31 can be connected to the second sub-oil passage 612 , which can reduce the arrangement length of the third sub-oil passage 621 and simplify the structure of the suspension system.

[0100] Optionally, the suspension system also includes a second one-way valve 72 and a third one-way valve 73, and the connection between the second sub-oil circuit 612 and the third sub-oil circuit 621 is a fourth connection d; the second one-way valve 72 is arranged in the second sub-oil circuit 612 and is arranged between the fourth connection d and the accumulator 5, the second one-way valve 72 is connected from the energy recovery mechanism 4 to the accumulator 5, and the second one-way valve 72 is used to control the medium in the energy recovery mechanism 4 to flow to the accumulator 5; the third one-way valve 73 is arranged in the third sub-oil circuit 621 and is arranged between the fourth connection d and the cavity 31, the third one-way valve 73 is connected from the energy recovery mechanism 4 to the cavity 31, and is used to control the medium in the energy recovery mechanism 4 to flow to the cavity 31.

[0101] In the embodiment of the utility model, when the cavity 31 is under high pressure, the medium in the cavity 31 can flow into the energy recovery mechanism 4, and then be introduced into the accumulator 5 by the second one-way valve 72; when the cavity 31 is under low pressure, the medium in the accumulator 5 can flow into the energy recovery mechanism 4, and then be introduced into the cavity 31 by the third one-way valve 73, which can improve the reliability of the medium in the energy recovery mechanism 4 flowing to the accumulator 5 or the cavity 31 respectively.

[0102] Specifically, taking a liquid inlet as an example, an end of the third sub-oil path 621 away from the energy recovery mechanism 4 can be connected to the first end of the first sub-oil path 611, such as Figure 2 As shown, the first one-way valve 71 is disposed between the first connection a and the second connection b; or, the end of the third sub-oil path 621 away from the energy recovery mechanism 4 can also be directly connected to the cavity 31, and the first one-way valve 71 is disposed between the first connection a and the cavity 31. The first one-way valve 71 is used to control the medium in the cavity 31 to flow to the energy recovery mechanism 4 in one direction, so as to increase the pressure energy converted by the energy recovery mechanism 4 and improve the energy recovery efficiency.

[0103] Similarly, taking a liquid inlet as an example, the fourth end of the fourth sub-oil circuit 622 is connected to the second sub-oil circuit 612, and the fourth one-way valve 74 is arranged between the first connection a and the third connection c; or, the fourth end of the fourth sub-oil circuit 622 is directly connected to the accumulator 5, and the fourth one-way valve 74 is arranged between the first connection a and the accumulator 5.

[0104] Specifically, taking one liquid outlet as an example, the fourth end of the fourth sub-oil path 622 can be connected to the second sub-oil path 612, such as Figure 2 As shown, the second one-way valve 72 is disposed between the fourth connection d and the third connection c; or, the fourth end of the fourth sub-oil path 622 is directly connected to the accumulator 5, and the second one-way valve 72 is disposed between the fourth connection d and the accumulator 5. The second one-way valve 72 is used to control the medium in the energy recovery mechanism 4 to flow to the accumulator 5 in one direction, so as to pre-store more pressure energy, increase the subsequent accumulator 5 to transmit more pressure energy to the energy recovery mechanism 4, so that the energy recovery mechanism 4 can convert more pressure energy and improve the energy recovery efficiency.

[0105] Similarly, taking one liquid outlet as an example, the third one-way valve 73 is arranged between the fourth connection d and the second connection b; or, the third one-way valve 73 is arranged between the fourth connection d and the cavity 31. The third one-way valve 73 is used to control the medium in the accumulator 5 to flow to the energy recovery mechanism 4 in one direction; the fourth one-way valve 74 is arranged between the first connection a and the third connection c, and is used to control the medium in the accumulator 5 to flow to the energy recovery mechanism 4 in one direction, so that the energy recovery mechanism 4 can convert more pressure energy and improve the energy recovery efficiency.

[0106] Specifically, the first one-way valve 71 and the second one-way valve 72 have the same flow direction to control the medium in the cavity 31 to flow into the energy recovery mechanism 4 and the accumulator 5 in sequence, which can improve the reliability of the medium in the cavity 31 flowing to the accumulator 5 through the energy recovery mechanism 4.

[0107] Similarly, the fourth one-way valve 74 and the third one-way valve 73 have the same flow direction, which is used to control the medium in the accumulator 5 to flow into the energy recovery mechanism 4 and the cavity 31 in sequence, so as to improve the reliability of the medium in the accumulator 5 flowing to the cavity 31 through the energy recovery mechanism 4.

[0108] Specifically, the first one-way valve 71, the second one-way valve 72, the third one-way valve 73, and the fourth one-way valve 74 have simple structures and simple control methods, which facilitates simplifying the structure of the suspension system, reducing costs, and improving the convenience of application of the suspension system.

[0109] Specifically, the first one-way valve 71, the second one-way valve 72, the third one-way valve 73 and the fourth one-way valve 74 are all one-way valves, also known as check valves or non-return valves. The specific models of the first one-way valve 71, the second one-way valve 72, the third one-way valve 73 and the fourth one-way valve 74 can be the same or different.

[0110] Specifically, taking one liquid inlet and one liquid outlet, the end of the third sub-oil path 621 away from the energy recovery mechanism 4 is connected to the first end of the first sub-oil path 611, and the fourth end of the fourth sub-oil path 622 is connected to the second sub-oil path 612 as an example. Figure 2 As shown, the first one-way valve 71 is arranged in the first sub-oil circuit 611 and is located between the first connection a and the second connection b, the second one-way valve 72 is arranged in the second sub-oil circuit 612 and is located between the fourth connection d and the third connection c, the third one-way valve 73 is arranged in the third sub-oil circuit 621 and is located between the fourth connection d and the second connection b, and the fourth one-way valve 74 is arranged in the fourth sub-oil circuit 622 and is located between the first connection a and the third connection c. Under the action of the four one-way valves, the medium in the cavity 31 flows unidirectionally in sequence to the energy recovery mechanism 4 and the accumulator 5, and the medium in the accumulator 5 flows unidirectionally in sequence to the energy recovery mechanism 4 and the cavity 31.

[0111] Optionally, the suspension system may include a first three-way reversing valve, which may be connected to the first connection a, and the first check valve 71 and the fourth check valve 74 may be cancelled, so that the first three-way reversing valve directly replaces the first check valve 71 and the fourth check valve 74, thereby controlling the reliability of the first sub-oil circuit 611 or the fourth sub-oil circuit 622 in introducing the medium into the energy recovery mechanism 4.

[0112] Optionally, the suspension system may further include a second three-way reversing valve, which may be connected to the third connection c, and the second one-way valve 72 and the fourth one-way valve 74 may be cancelled, so that the second three-way reversing valve directly replaces the second one-way valve 72 and the fourth one-way valve 74, thereby controlling the reliability of the second sub-oil circuit 612 to introduce the medium into the accumulator 5, or the fourth sub-oil circuit 622 to export the medium in the accumulator 5.

[0113] Optionally, the suspension system may further include a third three-way reversing valve, which may be connected to the second connection b, and the first one-way valve 71 and the third one-way valve 73 may be cancelled, so that the third three-way reversing valve directly replaces the first one-way valve 71 and the third one-way valve 73, thereby controlling the reliability of the first sub-oil circuit 611 to export the medium out of the cavity 31, or the third sub-oil circuit 621 to import the medium into the cavity 31.

[0114] Optionally, the suspension system may further include a fourth three-way reversing valve, which may be connected to the fourth connection d, and the second one-way valve 72 and the third one-way valve 73 may be cancelled, so that the fourth three-way reversing valve directly replaces the second one-way valve 72 and the third one-way valve 73, thereby controlling the second sub-oil circuit 612 or the third sub-oil circuit 621 to export the medium out of the energy recovery mechanism 4.

[0115] Specifically, the first, second, third and fourth three-way reversing valves can all be three-way reversing valves, which can be controlled by a controller.

[0116] Optionally, the energy recovery mechanism 4 may include two liquid inlets; the first sub-oil path 611 may be connected to one of the liquid inlets, and the fourth sub-oil path 622 may be connected to the other of the liquid inlets.

[0117] In an embodiment of the utility model, the first sub-oil circuit 611 and the fourth sub-oil circuit 622 can be independently arranged, the medium in the cavity 31 can flow into the energy recovery mechanism 4 from one liquid inlet, and the medium in the accumulator 5 can flow into the energy recovery mechanism 4 from another liquid inlet, thereby ensuring the reliability of the energy recovery mechanism 4 receiving the medium in the cavity 31 and the accumulator 5 respectively.

[0118] Specifically, the fourth sub-oil circuit 622 is arranged in parallel with one end of the energy recovery mechanism 4 and the first sub-oil circuit 611 is arranged in parallel with one end of the energy recovery mechanism 4, so that the media in the fourth sub-oil circuit 622 and the first sub-oil circuit 611 can flow into the energy recovery mechanism 4 in the same direction, which is convenient for simplifying the difficulty of structural arrangement of the energy recovery mechanism 4, can reduce the structural cost of the energy recovery mechanism 4, and can further improve the energy recovery efficiency.

[0119] Optionally, the energy recovery mechanism 4 may include two liquid outlets; the second sub-oil path 612 is connected to one of the liquid outlets, and the third sub-oil path 621 is connected to the other liquid outlet.

[0120] In an embodiment of the utility model, the second sub-oil circuit 612 and the third sub-oil circuit 621 are independently arranged, and the medium in the energy recovery mechanism 4 can flow into the second sub-oil circuit 612 from one of the liquid outlets and flow into the third sub-oil circuit 621 from the other liquid outlet, thereby ensuring the reliability of the medium in the energy recovery mechanism 4 flowing to the cavity 31 and the accumulator 5 respectively.

[0121] Optionally, the shock absorbing mechanism 3 may include a piston 32 movable in the cavity 31, and the piston 32 may divide the cylinder 35 into a first cavity 311 and a second cavity 312; the piston 32 moves in the cavity 31, and may change the volume of the first cavity 311 and the second cavity 312, thereby changing the pressure in the first cavity 311 and the second cavity 312.

[0122] Optionally, the first cavity 311 may be connected to the first oil circuit 61 and the second oil circuit 62 respectively, so as to adjust the medium in the first cavity 311 or the accumulator 5 to flow to the energy recovery mechanism 4 through the pressure change in the first cavity 311 .

[0123] Specifically, the first cavity 311 and the second cavity 312 may be filled with a medium, which may be a gas or a liquid, etc. Under the movement of the piston 32, the pressure in the first cavity 311 and the second cavity 312 may be adjusted. For example, the piston 32 squeezes the first cavity 311, which may increase the pressure in the first cavity 311 and reduce the pressure in the second cavity 312; or the piston 32 squeezes the second cavity 312, which may increase the pressure in the second cavity 312 and reduce the pressure in the first cavity 311.

[0124] Specifically, during the vibration of the unsprung mass 12 , the elastic element 2 can be driven to expand and contract, thereby driving the piston 32 to move in the cylinder 35 .

[0125] Specifically, when the elastic element 2 is in the initial state, the corresponding piston 32 can be located in the middle position of the cylinder 35, so that the volumes of the first cavity 311 and the second cavity 312 are the same; when the elastic element 2 is compressed, the piston 32 squeezes the first cavity 311, and the volume of the first cavity 311 can be smaller than the volume of the second cavity 312; when the elastic element 2 is extended, the piston 32 squeezes the second cavity 312, and the volume of the second cavity 312 can be smaller than the volume of the first cavity 311.

[0126] Optionally, the shock absorbing mechanism 3 may have a compression stroke and an extension stroke; the piston 32 moves along the first direction and compresses the first cavity 311, the shock absorbing mechanism 3 may switch to the compression stroke, and the medium in the first cavity 311 flows into the energy recovery mechanism 4 and the accumulator 5 through the first oil circuit 61; the piston 32 moves along the second direction and compresses the second cavity 312, the shock absorbing mechanism 3 switches to the extension stroke, and the medium in the accumulator 5 flows into the energy recovery mechanism 4 and the first cavity 311 through the second oil circuit 62, wherein the second direction is opposite to the first direction.

[0127] In the embodiment of the utility model, when the shock absorbing mechanism 3 is in the compression stroke, the medium in the first cavity 311 enters the energy recovery mechanism 4 through the first oil path 61; when the shock absorbing mechanism 3 is in the extension stroke, the medium in the accumulator 5 can enter the energy recovery mechanism 4 through the second oil path 62, so that during the process of the shock absorbing mechanism 3 expanding and contracting, the energy recovery mechanism 4 can convert the pressure energy into electrical energy for storage. In the embodiment of the utility model, the vibration mechanical energy can be converted into electrical energy for recycling, so that the vibration of the vehicle can be suppressed and the economy and driving range of the vehicle can be improved.

[0128] Specifically, when the unsprung mass 12 vibrates, the elastic element 2 undergoes telescopic deformation and can drive the piston 32 to move.

[0129] Optionally, a damping hole 321 may be provided on the piston 32, and the damping hole 321 may connect the first cavity 311 and the second cavity 312, so that under the action of the damping hole 321, the medium in the first cavity 311 and the second cavity 312 may be transmitted to each other, and the damping hole 321 may damp the medium, thereby facilitating the generation of a pressure difference between the first cavity 311 and the second cavity 312.

[0130] Specifically, the medium in the first cavity 311 and the second cavity 312 may be liquid oil, and the damping hole 321 may have a good damping effect on the flow of the liquid. Furthermore, due to the existence of the damping hole 321, the viscosity of the damping oil is relatively high, which facilitates the generation of a pressure difference between the first cavity 311 and the second cavity 312. For example, Figure 3 As shown, the volume of the first cavity 311 is reduced, and the first cavity 311 can form a high-pressure cavity; Figure 4 As shown, the volume of the first cavity 311 increases, so that the first cavity 311 can form a low-pressure cavity.

[0131] Specifically, the number of the damping holes 321 can be set according to actual needs, and the embodiment of the utility model does not specifically limit this.

[0132] Optionally, the energy recovery mechanism 4 may include a hydraulic motor 41, a generator 42 and a battery 44 connected in sequence; the hydraulic motor 41 is arranged in the first sub-oil circuit 611 and the fourth sub-oil circuit 622; the medium in the cavity 31 flows to the accumulator 5 through the hydraulic motor 41; the medium in the accumulator 5 flows to the cavity 31 through the hydraulic motor 41.

[0133] In an embodiment of the utility model, the hydraulic motor 41 can receive the medium through the first sub-oil circuit 611 and the second sub-oil circuit 612 respectively, so that the high-pressure medium can drive the hydraulic motor 41, the hydraulic motor 41 can drive the generator 42 to generate electricity, and the battery 44 can store electrical energy, which facilitates the energy recovery mechanism 4 to convert pressure energy into electrical energy and store it.

[0134] Specifically, the medium in the first oil circuit 61 and the second oil circuit 62 flows in the same direction through the hydraulic motor 41, so that the hydraulic motor 41 can always rotate in one direction, which can simplify the structure of the energy recovery mechanism 4 and reduce the design cost of the suspension system.

[0135] Specifically, the suspension system further includes a converter 43 , which is connected to the generator 42 and the battery 44 respectively. The converter 43 can convert and output a stable voltage.

[0136] Specifically, high-pressure oil drives the hydraulic motor 41, and the mechanical output shaft of the hydraulic motor 41 can be connected to the mechanical input shaft of the generator 42 through a coupling, so that the hydraulic motor 41 can drive the generator 42 to generate electricity. The converter 43 is connected to the generator 42 and outputs a stable voltage through DC / DC, and finally the electrical energy is stored in the battery 44.

[0137] Specifically, the generator 42 may be a direct current generator, and the converter 43 may be a DC / DC converter.

[0138] Specifically, Figure 3 As shown, the shock absorbing mechanism 3 performs a compression stroke, the piston 32 moves downward, the volume of the first cavity 311 decreases, so that the first cavity 311 forms a high-pressure cavity, and the high-pressure medium flows to the hydraulic motor 41 through the first one-way valve 71. The hydraulic motor 41 drives the generator 42 to generate electricity, and the converter 43 outputs a stable voltage, so that the electric energy can be stored in the battery 44. Afterwards, the high-pressure medium can flow to the accumulator 5 through the second one-way valve 72, and the remaining pressure energy can be temporarily stored in the accumulator 5.

[0139] Specifically, Figure 4 As shown, the shock absorbing mechanism 3 performs an extension stroke, the piston 32 moves upward, the volume of the first cavity 311 increases, so that the first cavity 311 forms a low-pressure cavity, and a pressure difference can be generated at both ends of the hydraulic motor 41. The pressure energy temporarily stored in the accumulator 5 can flow to the hydraulic motor 41 through the fourth one-way valve 74 to drive the hydraulic motor 41 to rotate, and at the same time drive the DC generator 42 to generate electricity. Similarly, the pressure energy is converted into electrical energy and stored in the battery 44. Afterwards, the low-pressure oil can return to the first cavity 311 through the third one-way valve 73.

[0140] Furthermore, the above two strokes constitute a working cycle of the suspension system. The compression stroke and the extension stroke of the shock absorbing mechanism 3 can both drive the generator 42 to generate electricity. During the whole process, the vibration mechanical energy of the vehicle can be first converted into medium pressure energy and then converted into electrical energy. The vibration mechanical energy can be effectively recovered, the vehicle vibration can be suppressed, and the economy and driving range of the vehicle can be improved.

[0141] Optionally, the shock absorbing mechanism 3 may also include a piston rod 33 and a cylinder 35 enclosing the cavity 31; one end of the piston rod 33 is arranged in the cylinder 35 and connected to the piston 32; the other end of the piston rod 33 extends out of one end of the cylinder 35 and is connected to the sprung mass 11, and the other end of the cylinder 35 can be connected to the unsprung mass 12.

[0142] In the embodiment of the utility model, the other end of the piston rod 33 extends out from one end of the cylinder 35 and is connected to the sprung mass 11, and the other end of the cylinder 35 can be connected to the unsprung mass 12. In this way, when the unsprung mass 12 vibrates and drives the elastic element 2 to expand and contract, it is easy to drive the piston rod 33 to move relative to the cylinder 35, so that the piston rod 33 can drive the piston 32 to move in the cylinder 35, so that a pressure difference is generated between the first cavity 311 and the second cavity 312.

[0143] Specifically, the piston rod 33 and the piston 32 may be fixedly connected, or may be integrally formed.

[0144] Specifically, at least a portion of the piston rod 33 may be disposed in the cylinder 35 , and the piston rod 33 may be sealed and movably connected to the cylinder 35 .

[0145] Specifically, one end of the piston rod 33 is located in the cylinder 35, and the other end of the piston rod 33 extends out of the cylinder 35 and can be fixedly connected to the sprung mass 11. Figure 1 As shown, the end of the piston rod 33 extending out of the cylinder 35 can be installed on the sprung mass 11 through the mounting ear 8, and the end of the piston rod 33 extending out of the cylinder 35 can also be provided with a buffer body 34.

[0146] Specifically, the other end of the cylinder 35 may be fixedly connected to the unsprung mass 12 .

[0147] In the embodiment of the utility model, the pressure difference generated by the movement of the piston 32 in the shock absorbing mechanism 3 is utilized through the energy recovery mechanism 4 and four one-way valves to drive the hydraulic motor 41 to move. The structure is simple, the relative transmission suspension system requires less modification, the cost is low, and it is easy to be put into application in engineering.

[0148] The suspension system described in the embodiment of the utility model has at least the following advantages:

[0149] In the embodiment of the utility model, since the first oil circuit is configured so that the medium in the cavity flows to the accumulator through the energy recovery mechanism, and the second oil circuit is configured so that the medium in the accumulator flows to the cavity through the energy recovery mechanism, when the unsprung mass vibrates, when the pressure in the cavity is high, the pressure energy can be transmitted to the energy recovery mechanism for conversion to obtain electrical energy for storage, or the excess pressure energy can be transmitted to the accumulator for storage; when the pressure in the cavity is low, the accumulator can transmit the pressure energy to the energy recovery mechanism for conversion to obtain electrical energy for storage. In the embodiment of the utility model, the vibration mechanical energy can be converted into electrical energy for recycling, which can improve the economy and driving range of the vehicle. Moreover, the first oil circuit and the second oil circuit have the same flow direction of the medium flowing through the energy recovery mechanism, which can also improve the convenience of the energy recovery mechanism in generating electricity, thereby improving the energy recovery efficiency.

[0150] In a second aspect, an embodiment of the utility model further discloses a vehicle, which may include a sprung mass 11 , an unsprung mass 12 and the above-mentioned suspension system: the suspension system may be arranged between the sprung mass 11 and the unsprung mass 12 .

[0151] In the embodiment of the utility model, the suspension system is arranged between the sprung mass 11 and the unsprung mass 12, which can provide buffering and shock absorption effects, and can convert vibration mechanical energy into pressure energy and then into electrical energy, so as to effectively recover the vibration mechanical energy and improve the economy and driving range of the vehicle.

[0152] The vehicle described in the embodiment of the utility model has at least the following advantages:

[0153] In the embodiment of the utility model, since the first oil circuit is configured so that the medium in the cavity flows to the accumulator through the energy recovery mechanism, and the second oil circuit is configured so that the medium in the accumulator flows to the cavity through the energy recovery mechanism, when the unsprung mass vibrates, when the pressure in the cavity is high, the pressure energy can be transmitted to the energy recovery mechanism for conversion to obtain electrical energy for storage, or the excess pressure energy can be transmitted to the accumulator for storage; when the pressure in the cavity is low, the accumulator can transmit the pressure energy to the energy recovery mechanism for conversion to obtain electrical energy for storage. In the embodiment of the utility model, the vibration mechanical energy can be converted into electrical energy for recycling, which can improve the economy and driving range of the vehicle. Moreover, the first oil circuit and the second oil circuit have the same flow direction of the medium flowing through the energy recovery mechanism, which can also improve the convenience of the energy recovery mechanism in generating electricity, thereby improving the energy recovery efficiency.

[0154] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0155] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0156] The above is a detailed introduction to a suspension system and a vehicle provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A suspension system, characterized in that: include: A shock absorbing mechanism, wherein two ends of the shock absorbing mechanism are respectively used to connect with the sprung mass and the unsprung mass; the shock absorbing mechanism has a cavity filled with a medium; Accumulator; Energy recovery mechanism; a first oil circuit, wherein the first oil circuit is configured so that the medium in the cavity flows to the accumulator via the energy recovery mechanism; a second oil circuit, the second oil circuit being configured so that the medium in the accumulator flows to the cavity through the energy recovery mechanism; The first oil circuit and the second oil circuit have the same flow direction of the medium flowing through the energy recovery mechanism.

2. The suspension system according to claim 1, characterized in that: The energy recovery mechanism comprises at least one liquid inlet and at least one liquid outlet; The first oil circuit and the second oil circuit are respectively connected to the liquid inlet, so that the energy recovery mechanism receives the medium in the cavity or the medium in the accumulator; The first oil circuit and the second oil circuit are respectively connected to the liquid outlet, so that the medium passing through the energy recovery mechanism flows to the accumulator through the first oil circuit, and the medium passing through the energy recovery mechanism flows to the cavity through the second oil circuit.

3. The suspension system according to claim 1, characterized in that: The first oil circuit includes a first sub-oil circuit and a second sub-oil circuit, and the second oil circuit includes a third sub-oil circuit and a fourth sub-oil circuit; One end of the first sub-oil channel is connected to the cavity, and the other end is connected to the energy recovery mechanism; One end of the second sub-oil circuit is connected to the energy recovery mechanism, and the other end is connected to the accumulator; One end of the third sub-oil channel is connected to the energy recovery mechanism, and the other end is connected to the cavity; One end of the fourth oil sub-channel is connected to the accumulator, and the other end is connected to the energy recovery mechanism.

4. The suspension system according to claim 3, characterized in that: The energy recovery mechanism includes a liquid inlet; One end of the fourth sub-oil circuit away from the accumulator is connected to the first sub-oil circuit, and the medium in the cavity and the accumulator enters the energy recovery mechanism through the first sub-oil circuit.

5. The suspension system according to claim 4, characterized in that: The suspension system comprises a first one-way valve and a fourth one-way valve, and the connection between the first sub-oil circuit and the fourth sub-oil circuit is a first connection; The first one-way valve is arranged in the first sub-oil circuit and between the first connection point and the cavity. The first one-way valve is connected from the cavity to the energy recovery mechanism. The first one-way valve is used to control the medium in the cavity to flow into the energy recovery mechanism. The fourth one-way valve is arranged in the fourth sub-oil circuit and between the first connection point and the accumulator. The fourth one-way valve is connected from the accumulator to the energy recovery mechanism. The fourth one-way valve is used to control the medium in the accumulator to flow into the energy recovery mechanism.

6. The suspension system according to claim 5, characterized in that: The first sub-oil path comprises a first end and a second end, the first end is connected to the cavity, and the second end is connected to the liquid inlet; An end of the third sub-oil passage away from the energy recovery mechanism is connected to the first end, and a connection point between the third sub-oil passage and the first sub-oil passage is a second connection point; An end of the fourth oil sub-circuit away from the accumulator is connected to the second end; The first one-way valve is disposed between the first connection and the second connection.

7. The suspension system according to claim 5, characterized in that: The fourth sub-oil path comprises a third end and a fourth end, the third end is connected to the first sub-oil path, the fourth end is connected to the second sub-oil path, and the connection between the fourth end and the second sub-oil path is a third connection; The fourth one-way valve is disposed between the first connection point and the third connection point.

8. The suspension system according to claim 3, characterized in that: The energy recovery mechanism includes two liquid inlets; The first sub-oil circuit is connected to one of the liquid inlets, and the fourth sub-oil circuit is connected to the other liquid inlet.

9. The suspension system according to any one of claims 3 to 8, characterized in that: The energy recovery mechanism includes a liquid outlet; One end of the third sub-oil passage away from the cavity is connected to the second sub-oil passage, and the medium in the energy recovery mechanism flows to the third sub-oil passage through the second sub-oil passage.

10. The suspension system according to claim 9, characterized in that The suspension system further includes a second one-way valve and a third one-way valve, and the connection between the second sub-oil circuit and the third sub-oil circuit is a fourth connection; The second one-way valve is arranged in the second sub-oil circuit and between the fourth connection point and the accumulator, and the second one-way valve is connected from the energy recovery mechanism to the accumulator to control the medium in the energy recovery mechanism to flow to the accumulator; The third one-way valve is arranged in the third sub-oil circuit and between the fourth connection point and the cavity. The third one-way valve is connected from the energy recovery mechanism to the cavity. The third one-way valve is used to control the medium in the energy recovery mechanism to flow to the cavity.

11. The suspension system according to any one of claims 3 to 8, characterized in that: The energy recovery mechanism includes two liquid outlets; The second sub-oil path is connected to one of the liquid outlets, and the third sub-oil path is connected to the other liquid outlet.

12. The suspension system according to claim 1, characterized in that The shock absorbing mechanism comprises a piston movable in the cavity, and the piston divides the cavity into a first cavity and a second cavity; The first cavity is connected to the first oil circuit and the second oil circuit respectively.

13. The suspension system according to claim 12, characterized in that The shock absorbing mechanism has a compression stroke and an extension stroke; The piston moves along a first direction and compresses the first cavity, the damping mechanism switches to the compression stroke, and the medium in the first cavity flows into the energy recovery mechanism and the accumulator through the first oil passage; The piston moves in a second direction and compresses the second cavity, the damping mechanism switches to the extension stroke, and the medium in the accumulator flows into the energy recovery mechanism and the first cavity through the second oil passage, wherein the second direction is opposite to the first direction.

14. The suspension system according to claim 12, characterized in that The piston is provided with a damping hole, and the damping hole communicates with the first cavity and the second cavity.

15. The suspension system according to claim 1, characterized in that The suspension system comprises an elastic element, and two ends of the elastic element are respectively used to connect with the sprung mass and the unsprung mass.

16. The suspension system according to claim 1, characterized in that The energy recovery mechanism includes a hydraulic motor, a generator and a battery connected in sequence; The hydraulic motor is arranged in the first oil circuit and the second oil circuit; The medium in the cavity flows to the accumulator through the hydraulic motor; The medium in the accumulator flows to the chamber through the hydraulic motor.

17. The suspension system of claim 1, wherein: The shock absorbing mechanism also includes a piston rod and a cylinder body enclosing the cavity; One end of the piston rod is disposed in the cylinder and connected to the piston; The other end of the piston rod extends out of one end of the cylinder and is used to be connected to the sprung mass, and the other end of the cylinder is used to be connected to the unsprung mass.

18. A vehicle, characterized in that: include: The sprung mass, the unsprung mass and the suspension system according to any one of claims 1 to 17; The suspension system is disposed between the sprung mass and the unsprung mass.

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