Return valve, hydraulic suspension system and vehicle

Abstract

The embodiment of the utility model provides a return valve, a hydraulic suspension system and a vehicle, and the return valve comprises a valve cover which is suitable for being arranged at one end of a valve sleeve of the return valve; the valve element is suitable for being arranged in an inner cavity of the valve sleeve; the valve cover is provided with a guide channel, the valve element is provided with a guide piece, the guide piece can slide along the guide channel to open or close a backflow channel of the backflow valve, and the valve element can be prevented from being clamped or stuck.

Description

Technical Field

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

[0002] With the development of vehicle technology, existing off-road vehicles are usually equipped with active hydraulic suspension systems to meet the needs of users in all-terrain off-road conditions. The working reliability of the hydraulic suspension system directly affects the active adjustment function of the vehicle's posture. Among them, the return valve is one of the key components in the hydraulic suspension system. However, the valve core of the existing return valve is easily affected by the impact of hydraulic oil during operation, resulting in stagnation or jamming. Utility Model Content

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a return valve, a hydraulic 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 utility model discloses a reflux valve, comprising:

[0005] A valve cover, the valve cover is suitable for being arranged at one end of the valve sleeve of the reflux valve;

[0006] A valve core, the valve core being adapted to be arranged in the inner cavity of the valve sleeve;

[0007] The valve cover is provided with a guide channel, and the valve core is provided with a guide member, and the guide member can slide along the guide channel to open or close the return channel of the return valve.

[0008] Optionally, the valve cover is provided with a return port which can be communicated with the inner cavity, and the valve sleeve is provided with an outlet port which is communicated with the inner cavity;

[0009] The reflux port, the outlet port and the inner cavity are combined to form at least a portion of the reflux channel.

[0010] Optionally, the reflux port may be in communication with the inner cavity via the guide member, and the guide member, the reflux port, the outlet port and the inner cavity may form at least a portion of the reflux channel in combination.

[0011] Optionally, the guide member has a first guide port and a first channel;

[0012] The first channel is communicated with the reflux port and the first guide port respectively;

[0013] The first guide port passes through the guide member and is used to connect the first channel and the inner cavity.

[0014] Optionally, the valve core has a first tapered portion, and the valve cover has a second tapered portion;

[0015] The first tapered portion and the second tapered portion are arranged opposite to each other;

[0016] When the guide member completely slides into the guide channel, the first conical portion and the second conical portion are in contact with each other, and the reflux channel is in a closed state; when the guide member at least partially slides out of the guide channel, the first conical portion and the second conical portion are spaced apart, and the reflux channel is in an open state.

[0017] Optionally, one of the first tapered portion and the second tapered portion is a tapered protrusion, and the other is a tapered groove.

[0018] Optionally, the reflux valve comprises a first elastic member, and two ends of the first elastic member are respectively connected to the valve core and the valve cover.

[0019] Optionally, the valve core includes a first connecting section and a second connecting section, and the second connecting section is connected between the first connecting section and the guide member;

[0020] The outer diameter of the second connecting section is smaller than the outer diameter of the first connecting section;

[0021] The first elastic member is sleeved on the second connecting section, and two ends of the first elastic member are respectively connected to the first connecting section and the valve cover.

[0022] Optionally, the reflux valve has an inlet channel that can communicate with the inner cavity;

[0023] When the inlet channel is open, the inlet channel is connected to the inner cavity, and the reflux channel is closed; when the inlet channel is closed, the inlet channel is disconnected from the inner cavity, and the reflux channel is opened.

[0024] Optionally, an inlet is provided at one end of the valve sleeve away from the valve cover;

[0025] The inlet, the valve core, the inner cavity and the outlet of the valve sleeve are combined to form the inlet channel.

[0026] Optionally, the valve core has a second flow guide port and a second channel;

[0027] The inlet is in communication with the second channel;

[0028] The second flow guide port passes through the valve core and is used for conducting the second channel and the inner cavity.

[0029] Optionally, the reflux valve further includes an output valve, and the output valve is movably connected in the second channel to open or close the second guide port.

[0030] Optionally, the output valve divides the second channel into a first sub-channel and a second sub-channel, the first sub-channel is connected to the inlet, and the second sub-channel is connected to the first channel of the guide member, and the medium in the first channel can push the output valve in the opposite direction while reflowing.

[0031] Optionally, the output valve comprises an inner valve tube and a valve head, and a third channel communicating with the inlet is provided in the inner valve tube;

[0032] The valve inner tube and the valve head are both arranged in the second channel;

[0033] The valve head is movably matched with the valve inner tube to open or close an end of the third channel away from the inlet.

[0034] Optionally, there is a gap between one end of the valve core away from the guide member and the valve sleeve;

[0035] One end of the valve inner tube away from the valve head abuts against the valve sleeve and is provided with an avoidance groove, wherein the avoidance groove communicates with the third channel and the gap.

[0036] Optionally, the output valve further includes a second elastic member, and two ends of the second elastic member are respectively connected to the valve head and the valve core.

[0037] Optionally, the valve head includes a first connecting portion and a second connecting portion;

[0038] The first connection part is arranged between the valve inner tube and the second connection part, and the outer diameter of the second connection part is smaller than the outer diameter of the first connection part;

[0039] The second elastic member is sleeved on the second connecting portion, and two ends of the second elastic member are respectively connected to the first connecting portion and the valve core.

[0040] Optionally, a plurality of spiral grooves arranged at intervals are provided on the outer periphery of one end of the valve core away from the guide member;

[0041] The spiral grooves extend along the circumferential direction and the axial direction of the valve core respectively.

[0042] Optionally, at least two annular grooves are provided on the outer periphery of one end of the valve core away from the guide member;

[0043] At least two of the annular grooves are spaced apart along the axial direction of the valve core.

[0044] Optionally, the annular groove divides the spiral groove into a first sub-spiral groove and a second sub-spiral groove;

[0045] Along the axial direction of the valve core, the annular grooves at both ends are respectively a first annular groove and a second annular groove, the first annular groove is communicated with the first sub-spiral groove adjacent thereto, and the second annular groove is communicated with the second sub-spiral groove adjacent thereto.

[0046] In a second aspect, the utility model discloses a hydraulic suspension system, comprising the above-mentioned return valve.

[0047] In a third aspect, the utility model discloses a vehicle, comprising the above-mentioned return valve or the above-mentioned hydraulic suspension system.

[0048] The utility model embodiment includes the following advantages:

[0049] In an embodiment of the utility model, the valve core is provided with a guide member, and the valve cover is provided with a guide channel. The guide member can slide along the guide channel to open or close the reflux channel of the reflux valve. Since the guide member and the guide channel slide together, they can guide the movement of the valve core, thereby improving the reliability of the movement of the valve core, and further improving the reliability of opening or closing the reflux channel of the reflux valve, thereby avoiding the valve core from getting stuck or stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a cross-sectional structural schematic diagram of a reflux valve of the utility model;

[0051] Figure 2 This is a structural schematic diagram of a valve core of the utility model;

[0052] Figure 3 The utility model is a structural schematic diagram of a valve inner tube.

[0053] Description of reference numerals:

[0054] 1. Valve sleeve; 11. Inlet; 12. Outlet; 13. Inner cavity; 2. Valve core; 21. Guide; 211. First channel; 212. First guide port; 22. Second guide port; 23. First tapered portion; 24. Second channel; 241. First sub-channel; 242. Second sub-channel; 25. Spiral groove; 26. Annular groove; 27. First connecting section; 28. Second connecting section; 3. Valve cover; 32. Second tapered portion; 33. Return port; 4. Output valve; 41. Valve inner tube; 411. Third channel; 412. Avoidance groove; 413. Third tapered portion; 42. Valve head; 421. Fourth tapered portion; 422. First connecting section; 423. Second connecting section; 5. Filter; 61. First sealing ring; 62. Second sealing ring; 71. First elastic member; 72. Second elastic member; 8. Gap. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The utility model embodiment discloses a reflux valve, comprising: a valve cover 3, the valve cover 3 is suitable for being arranged at one end of a valve sleeve 1 of the reflux valve; a valve core 2, the valve core 2 is suitable for being arranged in an inner cavity 13 of the valve sleeve 1; the valve cover 3 is provided with a guide channel, the valve core 2 is provided with a guide member 21, and the guide member 21 can slide along the guide channel to open or close the reflux channel of the reflux valve.

[0060] In the embodiment of the utility model, the valve core 2 is provided with a guide member 21, and the valve cover 3 is provided with a guide channel. The guide member 21 can slide along the guide channel to open or close the reflux channel of the reflux valve. Since the guide member 21 and the guide channel slide together, they can guide the movement of the valve core 2, thereby improving the reliability of the movement of the valve core 2, and further improving the reliability of opening or closing the reflux channel of the reflux valve, thereby avoiding the valve core 2 from getting stuck or stuck.

[0061] In the embodiment of the utility model, the reflux valve comprises a valve sleeve 1, a valve core 2 and a valve cover 3. The valve sleeve 1 has an inner cavity 13. The valve cover 3 is connected to one end of the valve sleeve 1 and can seal the valve core 2 in the inner cavity 13. Specifically, the valve cover 3 can be fixedly connected to the valve sleeve 1.

[0062] Specifically, the valve core 2 is provided with a guide member 21, and the valve cover 3 is provided with a guide channel, and the guide member 21 and the guide channel can be slidably matched, so as to guide and limit the valve core 2 and control the movement path of the valve core 2. The guide member 21 can be integrally formed with the valve core 2, or the guide member 21 can be fixedly connected to the valve core 2, i.e., spliced.

[0063] Furthermore, the guide member 21 is arranged on the side of the valve core 2 facing the valve cover 3, the guide channel can be arranged on the side of the valve cover 3 facing the valve core 2, and at least part of the guide member 21 can be embedded in the guide channel to control the guide member 21 to always slide in the guide channel, thereby ensuring that the valve core 2 is guided and limited.

[0064] Specifically, the guide member 21 can slide along the axial direction of the valve core 2 to control the valve core 2 to reciprocate only along its axial direction, which can improve the reliability and stability of opening or closing the reflux channel.

[0065] Optionally, the valve cover 3 is provided with a reflux port 33 which can communicate with the inner cavity 13, and the valve sleeve 1 is provided with an outlet port 12 which communicates with the inner cavity 13; the reflux port 33, the outlet port 12 and the inner cavity 13 are combined to form at least a part of the reflux channel.

[0066] In the embodiment of the utility model, the reflux port 33, the outlet port 12 and the inner cavity 13 are combined to form at least a portion of the reflux channel, so that the medium can form a reflux path from the outlet port 12 to the inner cavity 13 and then to the reflux port 33, thereby ensuring the reliability of the medium flow and further ensuring the reliability of the operation of the reflux valve.

[0067] Specifically, the valve core 2 slides along its axial direction, which can drive the guide member 21 to open or close the reflux channel, and the valve cover 3 and the valve core 2 can be combined to form a reflux valve. Furthermore, the guide member 21 blocks the reflux port 33, that is, closes the reflux channel, so that the reflux valve can be closed, which can prevent the medium from flowing out of the reflux valve from the reflux port 33; the guide member 21 opens the reflux port 33, that is, opens the reflux channel, so that the reflux valve can be opened, and the medium can flow out of the reflux valve from the reflux port 33, which plays a role in pressure relief.

[0068] Specifically, the reflux port 33 can be connected to an oil storage device to recycle the medium. The embodiment of the utility model only takes the medium as hydraulic oil as an example. The medium can also be a flame retardant liquid, etc. Other situations can refer to the settings.

[0069] In the embodiment of the utility model, the cooperation between the guide member 21 and the guide channel can effectively ensure the reliability of the axial movement of the valve core 2, thereby improving the reliability of the valve core 2 blocking the return port 33 and avoiding the valve core 2 from getting stuck or stuck.

[0070] Optionally, the reflux port 33 may be connected to the inner cavity 13 through the guide member 21 , and the guide member 21 , the reflux port 33 , the outlet port 12 and the inner cavity 13 may be combined to form at least a portion of the reflux channel.

[0071] In an embodiment of the utility model, the guide member 21, the reflux port 33, the outlet port 12 and the inner cavity 13 are combined to form at least a portion of the reflux channel, so that the medium flows from the outlet port 12 to the inner cavity 13, then to the guide member 21, and then to the reflux port 33, thereby forming the reflux path, which can further improve the reliability of the guide member 21 in opening or closing the reflux channel.

[0072] Specifically, the inner cavity 13 may be directly connected to the reflux port 33 , or may be indirectly connected to the reflux port 33 through the guide member 21 , and the specific selection may be made according to actual needs.

[0073] Optionally, the guide member 21 has a first guide port 212 and a first channel 211 ; the first channel 211 is connected to the return port 33 and the first guide port 212 respectively; the first guide port 212 passes through the guide member 21 to connect the first channel 211 and the inner cavity 13 .

[0074] In the embodiment of the utility model, the guide member 21 has a first guide port 212, so that when the guide member 21 slides out of the guide channel, it is convenient to connect the first guide port 212 to the first channel 211 and the inner cavity 13, thereby opening the reflux channel; when the guide member 21 slides into the guide channel, it is convenient to block the first guide port 212, separate the first channel 211 and the inner cavity 13, and then close the reflux channel.

[0075] Specifically, when the reflux valve is opened, the first guide port 212 is connected to the first channel 211 and the inner cavity 13 ; when the reflux valve is closed, the first channel 211 and the inner cavity 13 are separated.

[0076] Specifically, the first guide port 212 and the guide member 21 have a preset distance at the axial end of the valve core 2, and the preset distance can be selected according to actual needs. When the guide member 21 partially slides out of the guide channel, it can ensure that the first guide port 212 is connected to the first channel 211 and the inner cavity 13. When the guide member 21 completely or partially slides into the guide channel, it can ensure that the first guide port 212 is blocked, and the first channel 211 and the inner cavity 13 are separated.

[0077] Optionally, the valve core 2 has a first conical portion 23, and the valve cover 3 has a second conical portion 32; the first conical portion 23 and the second conical portion 32 are arranged opposite to each other; when the guide member 21 slides completely into the guide channel, the first conical portion 23 and the second conical portion 32 fit together, and the reflux channel is in a closed state; when the guide member 21 at least partially slides out of the guide channel, the first conical portion 23 and the second conical portion 32 are arranged at intervals, and the reflux channel is in an open state.

[0078] In the embodiment of the utility model, the first tapered portion 23 and the second tapered portion 32 fit together to achieve the sealing reliability between the valve core 2 and the valve cover 3, thereby improving the reliability of shutting off the reflux channel and the reliability of shutting off the reflux valve.

[0079] Specifically, when the first tapered portion 23 and the second tapered portion 32 are in contact with each other, the reflux valve is closed; when the first tapered portion 23 and the second tapered portion 32 are separated, the reflux valve is opened.

[0080] Specifically, the first conical portion 23 can be arranged at the end of the guide member 21 away from the valve cover 3, and the second conical portion 32 can be arranged at the end of the guide channel close to the valve core 2, so that when the first conical portion 23 and the second conical portion 32 are in contact, the guide member 21 can completely slide into the guide channel; when the first conical portion 23 and the second conical portion 32 are separated, part of the guide member 21 can slide out of the guide channel.

[0081] Optionally, one of the first tapered portion 23 and the second tapered portion 32 is a tapered protrusion, and the other is a tapered groove.

[0082] In the embodiment of the utility model, the conical protrusion is embedded in the conical groove, which can improve the tightness of the fit between the first conical portion 23 and the second conical portion 32, so as to further improve the reliability of shutting off the reflux channel.

[0083] Optionally, the reflux valve includes a first elastic member 71 , and two ends of the first elastic member 71 are respectively connected to the valve core 2 and the valve cover 3 .

[0084] In the embodiment of the utility model, the two ends of the first elastic member 71 are respectively connected to the valve core 2 and the valve cover 3, so that the rebound force of the first elastic member 71 can be used to drive the valve core 2 to move, thereby improving the convenience of opening or closing the reflux channel and further improving the response speed of the reflux valve.

[0085] Specifically, the valve core 2, the valve cover 3 and the first elastic member 71 together form a reflux valve. For example, when the valve core 2 is subjected to an external force, the first elastic member 71 is compressed, and the valve core 2 can close the reflux channel; after the external force on the valve core 2 disappears, the rebound force of the first elastic member 71 can drive the valve core 2 to reset and open the reflux channel. Similarly, the reverse is also possible, and the embodiments of the utility model will not be repeated.

[0086] Specifically, Figure 1 As shown, the external force drives the valve core 2 to move right, the first conical portion 23 of the valve core 2 and the second conical portion 32 of the valve cover 3 fit together, the reflux channel is closed, the reflux valve is closed, and the first elastic member 71 is compressed. After the external force disappears, the rebound force of the first elastic member 71 drives the valve core 2 to move left, the reflux channel opens, the reflux valve opens, the medium flows back from the reflux port 33 to the inner cavity 13, then enters the first channel 211 from the first guide port 212, and then flows out of the reflux valve from the reflux port 33.

[0087] Optionally, the valve core 2 includes a first connecting section 27 and a second connecting section 28, the second connecting section 28 is connected between the first connecting section 27 and the guide member 21; the outer diameter of the second connecting section 28 is smaller than the outer diameter of the first connecting section 27; the first elastic member 71 is sleeved on the second connecting section 28, and the two ends of the first elastic member 71 are respectively connected to the first connecting section 27 and the valve cover 3.

[0088] In the embodiment of the utility model, the second connecting section 28 is connected between the first connecting section 27 and the guide member 21, the outer diameter of the second connecting section 28 is smaller than the outer diameter of the first connecting section 27, and the two ends of the first elastic member 71 are respectively connected to the first connecting section 27 and the valve cover 3, which can improve the convenience of installing the first elastic member 71 and facilitate the first elastic member 71 to apply a rebound force to the valve core 2.

[0089] Specifically, the second connecting section 28 is connected between the first connecting section 27 and the guide member 21, and the outer diameter of the first connecting section 27 can be greater than the outer diameter of the second connecting section 28, and the outer diameter of the second connecting section 28 can be greater than the outer diameter of the guide member 21, so that one end of the first elastic member 71 is connected to the first connecting section 27, and the other end is connected to the valve cover 3. The first elastic member 71 and the first connecting section 27 can be fixedly connected or abutted, and the first elastic member 71 and the valve cover 3 can be fixedly connected or abutted.

[0090] Specifically, Figure 1 As shown, the external force drives the valve core 2 to move rightward, and the first connecting section 27 and the valve cover 3 squeeze the first elastic member 71; when the external force disappears, the first elastic member 71 drives the valve core 2 to move leftward through the first connecting section 27.

[0091] Optionally, the reflux valve has an inlet channel that can be connected to the inner cavity 13; when the inlet channel is open, the inlet channel is connected to the inner cavity 13 and the reflux channel is closed; when the inlet channel is closed, the inlet channel is closed to the inner cavity 13 and the reflux channel is opened.

[0092] In the embodiment of the utility model, the inlet channel is opened so that the medium is discharged from the outlet 12 through the inlet channel, which can ensure the control reliability of the reflux valve.

[0093] Specifically, Figure 1 As shown, when the inlet channel is opened, the medium drives the valve core 2 to move right, so that the valve core 2 closes the return channel; when the inlet channel is closed, the driving force on the valve core 2 disappears, so that the valve core 2 can move left under the rebound force of the first elastic member 71 to open the return channel.

[0094] Optionally, an inlet 11 is provided at one end of the valve sleeve 1 away from the valve cover 3; the inlet 11, the valve core 2, the inner cavity 13 and the outlet 12 of the valve sleeve 1 are combined to form an inlet channel.

[0095] In the embodiment of the utility model, the medium first enters from the inlet 11, then enters the valve core 2, then enters the inner cavity 13, and then flows to the outlet 12, which can form a liquid inlet path to ensure the reliability of the reflux valve response.

[0096] Specifically, the valve sleeve 1 includes a first end and a second end opposite to each other along the axial direction of the valve core 2, the first end of the valve sleeve 1 is provided with an inlet 11, and the second end of the valve sleeve 1 is connected to the valve cover 3; the valve core 2 is arranged in the inner cavity 13 of the valve sleeve 1; the inlet 11, the valve core 2, the inner cavity 13 and the outlet 12 are combined to form an inlet channel; the outlet 12, the inner cavity 13, the guide member 21 and the reflux port 33 are combined to form a reflux channel; the medium enters from the inlet 11, the inlet channel is opened, and the reflux channel is closed; the medium stops entering the inlet 11, the inlet channel is closed, and the reflux channel is opened.

[0097] Specifically, the inlet 11 is used to receive the medium to obtain the driving force; the inlet 11 can be connected to the control pump. A filter 5 can be arranged in the inlet 11 to allow the filtered medium to enter the valve core 2. The outlet 12 can be connected to the hydraulic suspension, and the outlet 12 can be used to introduce the medium into the hydraulic suspension.

[0098] Optionally, the valve core 2 has a second flow guide port 22 and a second channel 24 ; the flow inlet 11 is in communication with the second channel 24 ; the second flow guide port 22 passes through the valve core 2 to connect the second channel 24 and the inner cavity 13 .

[0099] In the embodiment of the utility model, the opening or closing of the inlet channel can be controlled by controlling the opening or closing of the second guide port 22. The implementation method is relatively simple and convenient, which is convenient for simplifying the structure of the reflux valve and reducing the cost of the reflux valve.

[0100] Optionally, the reflux valve further includes an output valve 4 , which is movably connected to the second channel 24 to open or close the second guide port 22 .

[0101] In the embodiment of the utility model, the opening or closing of the second guide port 22 is controlled by the output valve 4, which is simple and convenient to implement, and is convenient for simplifying the structure of the reflux valve and reducing the cost of the reflux valve.

[0102] Optionally, the output valve 4 divides the second channel 24 into a first sub-channel 241 and a second sub-channel 242. The first sub-channel 241 is connected to the inlet, and the second sub-channel 242 is connected to the first channel 211 of the guide member 21. The medium in the first channel 211 can push the output valve 4 in the opposite direction while reflowing. In this way, when the reflux channel is opened, the medium in the first channel 211 can push the output valve 4 to quickly close the second guide port 22, thereby realizing the rapid closing of the inlet channel, which is convenient for improving the response speed of the reflux valve.

[0103] Specifically, the inlet 11 guides the medium into the first sub-channel 241, so that the medium can drive the output valve 4 to open, the second guide port 22 can guide the medium from the second channel 24 into the inner cavity 13, and the outlet 12 can guide the medium in the inner cavity 13 to the hydraulic suspension, so as to control the posture change of the vehicle. At the same time, the output valve 4 can drive the valve core 2 to move, so that the valve core 2 closes the return channel and the return valve is closed.

[0104] Optionally, the output valve 4 includes a valve inner tube 41 and a valve head 42, and a third channel 411 connected to the inlet 11 is arranged in the valve inner tube 41; the valve inner tube 41 and the valve head 42 are both arranged in the second channel 24; the valve head 42 and the valve inner tube 41 are movably matched to open or close the end of the third channel 411 away from the inlet 11.

[0105] In the embodiment of the utility model, the opening or closing of the inlet channel can be controlled by utilizing the movable cooperation between the valve head 42 and the valve inner tube 41, and the implementation method is relatively simple and convenient.

[0106] Specifically, since the third channel 411 is connected to the inlet 11, the valve head 42 and the valve inner tube 41 are tightly matched, and the third channel 411 can be closed, so that the medium cannot enter the inner cavity 13 through the second guide port 22, and the inlet channel is closed, thereby realizing the closing of the output valve 4; the valve head 42 is away from the valve inner tube 41, and the third channel 411 can be opened, so that the medium can enter the inner cavity 13 through the second guide port 22, and the inlet channel is opened, thereby realizing the opening of the output valve 4.

[0107] Specifically, Figure 1 As shown, the medium enters the second channel 24 from the inlet 11, which can squeeze the valve head 42, so that the valve head 42 moves right to open the third channel 411. The second guide port 22 can guide the medium from the third channel 411 into the inner cavity 13, so that the medium flows out from the outlet 12, the inlet channel is opened, and the output valve 4 is opened. At the same time, the valve head 42 can also squeeze the valve core 2 to drive the valve core 2 to move right, the guide member 21 completely slides into the first channel 211, the first guide port 212 is blocked, the reflux channel is closed, and the reflux valve is closed.

[0108] Specifically, the second guide port 22 may be disposed corresponding to an end of the third channel 411 away from the inlet port 11 , so as to facilitate the reliability of the valve head 42 in opening or closing the inlet channel.

[0109] Specifically, the inner tube 41 of the valve can be fixedly connected or rotatably connected to the valve core 2. A limiting protrusion is provided on the inner wall of the valve core 2. The limiting protrusion can limit the inner tube 41 of the valve to facilitate the fixed connection between the inner tube 41 of the valve and the valve core 2. Alternatively, the inner tube 41 of the valve can also be fixed to the valve core 2 by bonding or the like.

[0110] Specifically, the valve head 42 can slide along the axial direction of the valve core 2. When the valve head 42 is in contact with the valve inner tube 41, the inlet channel can be closed; when the valve head 42 is separated from the valve inner tube 41, the third channel 411 and the second guide port 22 can be connected.

[0111] Optionally, a third conical portion 413 may be provided at one end of the valve head 42 facing the valve inner tube 41, and a fourth conical portion 421 may be provided at one end of the valve inner tube 41 facing the valve head 42. When the third conical portion 413 and the fourth conical portion 421 are in contact with each other, the output valve 4 can be closed; when the third conical portion 413 and the fourth conical portion 421 are separated, the output valve 4 can be opened.

[0112] Specifically, the third tapered portion 413 and the fourth tapered portion 421 fit together, which can improve the sealing between the valve head 42 and the valve inner tube 41 , thereby preventing the medium in the third channel 411 from leaking from the second guide port 22 to the inner cavity 13 .

[0113] Optionally, one of the third tapered portion 413 and the fourth tapered portion 421 may be a tapered protrusion, and the other may be a tapered groove.

[0114] Optionally, combined Figure 1 and Figure 3 As shown, there is a gap 8 between the end of the valve core 2 away from the guide member 21 and the valve sleeve 1; the end of the valve inner tube 41 away from the valve head 42 abuts against the valve sleeve 1 and is provided with an avoidance groove 412, which connects the third channel 411 and the gap 8.

[0115] In the embodiment of the utility model, after the medium enters from the inlet 11, a part of it can enter the second channel 24, and the other part can enter the gap 8 from the avoidance groove 412, so that the two ends of the valve core 2 quickly generate a pressure difference and move, which can improve the response speed of the reflux valve.

[0116] Specifically, at least part of the valve inner tube 41 extends out of the second channel 24 and abuts against the valve sleeve 1; an avoidance groove 412 is provided at the end of the valve inner tube 41 abutting against the valve sleeve 1, and the avoidance groove 412 runs through the valve inner tube 41, and the avoidance groove 412 is used to connect the first channel 211 and the gap 8.

[0117] Optionally, the output valve 4 further includes a second elastic member 72 , and two ends of the second elastic member 72 are respectively connected to the valve head 42 and the valve core 2 .

[0118] In the embodiment of the utility model, the rebound force of the second elastic member 72 can be used to drive the valve head 42 to move, thereby improving the response speed of the reflux valve.

[0119] Specifically, Figure 1 As shown, the external force drives the valve head 42 to move right, the third channel 411 opens, so that the inlet channel is opened, and the second elastic member 72 is compressed. Moreover, since the two ends of the second elastic member 72 are respectively connected to the valve head 42 and the valve core 2, the second elastic member 72 can also drive the valve core 2 to move right; when the external force disappears, the second elastic member 72 drives the valve head 42 to move left, and the third channel 411 is closed, so that the inlet channel is closed.

[0120] Optionally, the valve head 42 includes a first connecting portion 422 and a second connecting portion 423; the first connecting portion 422 is arranged between the valve inner tube 41 and the second connecting portion 423, and the outer diameter of the second connecting portion 423 is smaller than the outer diameter of the first connecting portion 422; the second elastic member 72 is sleeved on the second connecting portion 423, and the two ends of the second elastic member 72 are respectively connected to the first connecting portion 422 and the valve core 2.

[0121] In the embodiment of the utility model, the outer diameter of the second connecting part 423 is smaller than the outer diameter of the first connecting part 422, and the second elastic member 72 is sleeved on the second connecting part 423, so that the two ends of the second elastic member 72 are respectively connected to the first connecting part 422 and the valve core 2, thereby facilitating the second elastic member 72 to apply a rebound force to the valve head 42.

[0122] Specifically, Figure 1 As shown, the external force drives the valve head 42 to move right, so that the first connecting part 422 and the valve core 2 squeeze the second elastic member 72, the second elastic member 72 is compressed, and the output valve 4 is opened; after the external force disappears, the second elastic member 72 drives the valve head 42 to move left through the first connecting part 422, and the output valve 4 is closed.

[0123] Specifically, Figure 1 As shown, at least a portion of the first connection portion 422 of the valve head 42 is embedded in the third channel 411 , so that the third channel 411 can limit and guide the first connection portion 422 , thereby preventing the valve head 42 from getting stuck or stuck.

[0124] Specifically, both ends of the second elastic member 72 are connected to the first connection portion 422 and the valve core 2 respectively, the second elastic member 72 and the first connection portion 422 may be fixedly connected or abutted, and the second elastic member 72 and the valve core 2 may be fixedly connected or abutted.

[0125] Alternatively, if Figure 2 As shown, a plurality of spiral grooves 25 arranged at intervals are provided on the outer periphery of one end of the valve core 2 away from the guide member 21 ; the spiral grooves 25 extend along the circumferential direction and the axial direction of the valve core 2 respectively.

[0126] In the embodiment of the utility model, after the avoidance groove 412 guides the medium into the gap 8, the medium can continue to flow into the spiral groove 25. Since the spiral groove 25 extends along the circumference and axial direction of the valve core 2 respectively, the medium in the spiral groove 25 drives the valve core 2 to move along its circumference and axial direction. During the sliding process of the valve core 2, a uniform oil pressure is generated in the circumference of the valve core 2, which can improve the uniformity of the force on the valve core 2 and thereby avoid the valve core 2 from getting stuck or stuck.

[0127] Specifically, during the circumferential rotation of the valve core 2, the outer periphery of the first connecting section 27 and the valve sleeve 1 are evenly worn, thereby avoiding offset wear of the valve core 2 and increasing the service life of the entire reflux valve.

[0128] Specifically, the shape of the spiral groove 25 is spiral, and the number of the spiral grooves 25 can be selected according to actual needs, which is not specifically limited in the embodiment of the utility model.

[0129] Optionally, a plurality of spiral grooves 25 may be evenly spaced along the circumference of the valve core 2 to further improve the force uniformity of the valve core 2 and avoid offset wear of the valve core 2 .

[0130] Optionally, at least two annular grooves 26 are provided on the outer periphery of one end of the valve core 2 away from the guide member 21 ; and the at least two annular grooves 26 are spaced apart along the axial direction of the valve core 2 .

[0131] In the embodiment of the utility model, the annular groove 26 can store medium, and the medium in the annular groove 26 can uniformly apply pressure to the valve core 2 along the circumference of the valve core 2, which can prevent the pressure loss from being too fast when the valve core 2 slides and reduce efficiency loss.

[0132] Specifically, the specific number of the annular grooves 26 can be set according to actual needs, and the embodiment of the utility model does not make any specific limitation on this.

[0133] Specifically, the medium of the spiral groove 25 can form uniform oil pressure in the circumferential direction of the valve core 2, and can also generate uniform oil pressure in the axial direction of the valve core 2. The annular groove 26 can generate uniform oil pressure in the axial direction of the valve core 2 to drive the valve core 2 to rotate while sliding along its axial direction.

[0134] Optionally, the annular groove 26 divides the spiral groove 25 into a first sub-spiral groove and a second sub-spiral groove; along the axial direction of the valve core 2, the annular grooves 26 located at both ends are respectively the first annular groove and the second annular groove, the first annular groove is connected to the first sub-spiral groove adjacent to it, and the second annular groove is connected to the second sub-spiral groove adjacent to it.

[0135] In the embodiment of the utility model, the annular groove 26 can be arranged between the first sub-spiral groove and the second sub-spiral groove, which can further improve the effect of preventing the pressure loss from being too fast during the sliding process of the valve core 2.

[0136] Specifically, the working principle of the reflux valve described in the embodiment of the utility model includes:

[0137] like Figure 1 As shown, the medium enters the third channel 411 from the inlet 11 and drives the valve head 42 to move rightward, the second elastic member 72 is compressed, the third channel 411 is connected to the inner cavity 13 through the second guide port 22, the inlet channel is opened, the output valve 4 is opened, and the medium enters the hydraulic suspension through the outlet 12. At the same time, the medium can flow from the avoidance groove 412 to the gap 8, and then flow into the spiral groove 25 and the annular groove 26, so that the two ends of the valve core 2 instantly generate a pressure difference, which can drive the valve core 2 to move rightward, the first conical portion 23 of the valve core 2 and the second conical portion 32 of the valve cover 3 are fitted, the first guide port 212 is blocked, the reflux channel is closed, the reflux valve is closed, and the first elastic member 71 is compressed.

[0138] like Figure 1As shown, after the medium is stopped from being input into the inlet 11, the driving force on the valve head 42 disappears, and the rebound force of the second elastic member 72 can drive the valve head 42 to move in the opposite direction, so that the valve head 42 moves to the left and fits with the inner tube 41 of the valve, the second guide port 22 is blocked, the inlet channel is closed, and the output valve 4 is closed. At the same time, the rebound force of the first elastic member 71 drives the valve core 2 to move to the left, the second guide port 22 connects the inner cavity 13 and the second channel 24, the reflux channel is opened, and the reflux valve is opened, and the medium enters the inner cavity 13 from the outlet 12, and then enters the second channel 24 through the second guide port 22, and then is discharged to the oil storage pot through the reflux port 33.

[0139] The reflux valve described in the embodiment of the utility model has at least the following advantages:

[0140] In the embodiment of the utility model, the valve core 2 is provided with a guide member 21, and the valve cover 3 is provided with a guide channel. The guide member 21 can slide along the guide channel to open or close the reflux channel of the reflux valve. Since the guide member 21 and the guide channel slide together, they can guide the movement of the valve core 2, thereby improving the reliability of the movement of the valve core 2, and further improving the reliability of opening or closing the reflux channel of the reflux valve, thereby avoiding the valve core 2 from getting stuck or stuck.

[0141] In a second aspect, an embodiment of the utility model further discloses a hydraulic suspension system, which may include the above-mentioned return valve.

[0142] Specifically, the hydraulic suspension system may include a control pump, an oil storage device, a hydraulic suspension, and the return valve of the above embodiment. The inlet 11 of the return valve may be connected to the control pump via an oil inlet pipeline, the outlet 12 of the return valve may be connected to the hydraulic suspension via an oil outlet pipeline, and the return port 33 of the return valve may be connected to the oil storage device via an oil return pipeline. The oil storage device may be an oil tank or an oil pot, etc. The hydraulic suspension may include a posture control valve.

[0143] Optionally, the control pump can be sleeved on one end of the valve sleeve 1 of the reflux valve, and a first sealing ring 61 can be provided between the control pump and the valve sleeve 1 to prevent pressure leakage of the control pump input, so that the medium can flow reliably in the inlet channel. Figure 1 As shown, a first annular groove is arranged outside the valve sleeve 1, and at least a part of the first sealing ring 61 can be embedded in the first annular groove.

[0144] Optionally, the hydraulic suspension can be sleeved on the end of the valve sleeve 1 away from the control pump, and a second sealing ring 62 can be provided between the hydraulic suspension and the valve sleeve 1 to improve the reflux channel to reliably guide the medium into the shock absorber and avoid leakage to the oil storage device.

[0145] The hydraulic suspension system described in the embodiment of the utility model can achieve the beneficial effects that can be achieved by the above-mentioned return valve, which will not be described in detail.

[0146] In a third aspect, an embodiment of the utility model further discloses a vehicle, which may include the above-mentioned return valve or the above-mentioned hydraulic suspension system.

[0147] Specifically, the vehicle includes a controller, a control pump, a shock absorber and a hydraulic suspension system. When the reflux valve in the embodiment of the utility model is applied to a vehicle, taking a four-wheel vehicle as an example, its working principle is as follows:

[0148] like Figure 1 As shown, after the controller receives the instruction for the hydraulic suspension to raise its posture, the controller controls the motor to power on, controls the pump to start working, controls the medium output by the pump to enter from the inlet 11, and then enters the third channel 411 after being filtered by the filter 5, the valve head 42 moves to the right, the output valve 4 opens, and the second guide port 22 guides the medium from the third channel 411 into the inner cavity 13; at the same time, the avoidance groove 412 guides the medium into the gap, so that the medium can instantly fill the spiral groove 25 and the annular groove 26, and a pressure difference is generated at both ends of the valve core 2 and moves to the right, and the reflux valve is closed; the outlet 12 can guide the medium in the inner cavity 13 into the hydraulic suspension, and enter the posture control valve of the hydraulic suspension, and then be diverted to the four-wheel shock absorber in the vehicle to support the vehicle posture to rise.

[0149] Specifically, after the ascent is completed, the controller controls the motor to cut off the power and controls the pump to stop outputting the medium. The oil pressure in the third channel 411, the spiral groove 25 and the annular groove 26 is reduced, and the valve core 2 moves to the left under the push of the first elastic member 71, and the reflux valve opens. At the same time, the valve head 42 moves to the left under the push of the second elastic member 72, the oil pressure in the valve inner tube 41 is balanced, and the output valve 4 is closed.

[0150] Specifically, when the vehicle posture is maintained, the posture control valve is powered off and closed, the hydraulic oil in the four-wheel shock absorber maintains pressure, and the control pump and the return valve do not work to maintain the vehicle posture.

[0151] Specifically, when the vehicle posture descends, the posture control valve is powered on and opened. Under the pressure generated by the vehicle's gravity, the hydraulic oil of the four-wheel shock absorber flows back to the outlet 12 of the reflux valve through the posture control valve, enters the inner cavity 13, and then passes through the reflux port 33, that is, it can enter the oil storage device through the reflux channel.

[0152] The vehicle described in the embodiment of the utility model can achieve the beneficial effects that can be achieved by the above-mentioned return valve or hydraulic suspension system, which will not be described in detail.

[0153] 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.

[0154] 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.

[0155] The above is a detailed introduction to a return valve, a hydraulic 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 reflux valve, characterized in that: include: A valve cover (3), wherein the valve cover (3) is suitable for being arranged at one end of the valve sleeve (1) of the reflux valve; A valve core (2), the valve core (2) being adapted to be arranged in an inner cavity (13) of the valve sleeve (1); The valve cover (3) is provided with a guide channel, and the valve core (2) is provided with a guide member (21). The guide member (21) can slide along the guide channel to open or close the return channel of the return valve.

2. The reflux valve according to claim 1, characterized in that: The valve cover (3) is provided with a return port (33) which can be communicated with the inner cavity (13), and the valve sleeve (1) is provided with an outlet port (12) which is communicated with the inner cavity (13); The reflux port (33), the outlet port (12) and the inner cavity (13) are combined to form at least a portion of the reflux channel.

3. The reflux valve according to claim 2, characterized in that: The reflux port (33) can be connected to the inner cavity (13) through the guide member (21); the guide member (21), the reflux port (33), the outlet port (12) and the inner cavity (13) are combined to form at least part of the reflux channel.

4. The reflux valve according to claim 3, characterized in that: The guide member (21) has a first guide port (212) and a first channel (211); The first channel (211) is communicated with the reflux port (33) and the first flow guide port (212) respectively; The first guide port (212) passes through the guide member (21) and is used to connect the first channel (211) and the inner cavity (13).

5. The reflux valve according to claim 3, characterized in that: The valve core (2) has a first tapered portion (23), and the valve cover (3) has a second tapered portion (32); The first tapered portion (23) and the second tapered portion (32) are arranged opposite to each other; When the guide member (21) completely slides into the guide channel, the first conical portion (23) and the second conical portion (32) fit together, and the reflux channel is in a closed state; when the guide member (21) at least partially slides out of the guide channel, the first conical portion (23) and the second conical portion (32) are spaced apart, and the reflux channel is in an open state.

6. The reflux valve according to claim 5, characterized in that: One of the first tapered portion (23) and the second tapered portion (32) is a tapered protrusion, and the other is a tapered groove.

7. The reflux valve according to any one of claims 1 to 6, characterized in that: The return valve comprises a first elastic member (71), and two ends of the first elastic member (71) are respectively connected to the valve core (2) and the valve cover (3).

8. The reflux valve according to claim 7, characterized in that: The valve core (2) comprises a first connecting section (27) and a second connecting section (28), wherein the second connecting section (28) is connected between the first connecting section (27) and the guide member (21); The outer diameter of the second connecting section (28) is smaller than the outer diameter of the first connecting section (27); The first elastic member (71) is sleeved on the second connecting section (28), and two ends of the first elastic member (71) are respectively connected to the first connecting section (27) and the valve cover (3).

9. The reflux valve according to any one of claims 1 to 6, characterized in that: The reflux valve has an inlet channel that can communicate with the inner cavity (13); When the inlet channel is open, the inlet channel is connected to the inner cavity (13), and the reflux channel is closed; when the inlet channel is closed, the inlet channel is disconnected from the inner cavity (13), and the reflux channel is opened.

10. The reflux valve according to claim 9, characterized in that: An inlet (11) is provided at one end of the valve sleeve (1) away from the valve cover (3); The inlet port (11), the valve core (2), the inner cavity (13) and the outlet port (12) of the valve sleeve (1) are combined to form the inlet channel.

11. The reflux valve according to claim 10, characterized in that: The valve core (2) has a second flow guide port (22) and a second channel (24); The inlet (11) is in communication with the second channel (24); The second flow guide port (22) passes through the valve core (2) and is used to connect the second channel (24) and the inner cavity (13).

12. The reflux valve according to claim 11, characterized in that: The reflux valve further comprises an output valve (4), wherein the output valve (4) is movably connected to the second channel (24) to open or close the second flow guide port (22).

13. The reflux valve according to claim 12, characterized in that: The output valve (4) divides the second channel (24) into a first sub-channel (241) and a second sub-channel (242); the first sub-channel (241) is connected to the inlet (11), and the second sub-channel (242) is connected to the first channel (211) of the guide member (21); the medium in the first channel (211) can push the output valve (4) in the reverse direction while flowing back.

14. The reflux valve according to claim 12, characterized in that: The output valve (4) comprises an inner valve tube (41) and a valve head (42); a third channel (411) communicating with the inlet (11) is provided in the inner valve tube (41); The valve inner tube (41) and the valve head (42) are both arranged in the second channel (24); The valve head (42) is movably matched with the valve inner tube (41) to open or close an end of the third channel (411) away from the inlet (11).

15. The reflux valve according to claim 14, characterized in that There is a gap between the end of the valve core (2) away from the guide member (21) and the valve sleeve (1); One end of the valve inner tube (41) away from the valve head (42) abuts against the valve sleeve (1) and is provided with an avoidance groove (412), wherein the avoidance groove (412) communicates with the third channel (411) and the gap.

16. The reflux valve according to claim 14, characterized in that The output valve (4) further comprises a second elastic member (72), and two ends of the second elastic member (72) are respectively connected to the valve head (42) and the valve core (2).

17. The reflux valve according to claim 16, characterized in that The valve head (42) comprises a first connecting portion (422) and a second connecting portion (423); The first connecting portion (422) is arranged between the valve inner tube (41) and the second connecting portion (423), and the outer diameter of the second connecting portion (423) is smaller than the outer diameter of the first connecting portion (422); The second elastic member (72) is sleeved on the second connecting portion (423), and two ends of the second elastic member (72) are respectively connected to the first connecting portion (422) and the valve core (2).

18. The reflux valve according to any one of claims 1 to 6, characterized in that: The outer periphery of one end of the valve core (2) away from the guide member (21) is provided with a plurality of spiral grooves (25) arranged at intervals; The spiral groove (25) extends along the circumferential direction and the axial direction of the valve core (2) respectively.

19. The reflux valve according to claim 18, characterized in that At least two annular grooves (26) are provided on the outer periphery of one end of the valve core (2) away from the guide member (21); At least two annular grooves (26) are arranged at intervals along the axial direction of the valve core (2).

20. The reflux valve according to claim 19, characterized in that The annular groove (26) divides the spiral groove (25) into a first sub-spiral groove and a second sub-spiral groove; Along the axial direction of the valve core (2), the annular grooves (26) located at both ends are respectively a first annular groove and a second annular groove, the first annular groove is connected to the first sub-spiral groove adjacent to it, and the second annular groove is connected to the second sub-spiral groove adjacent to it.

21. A hydraulic suspension system, characterized in that: The invention comprises a reflux valve as described in any one of claims 1 to 20.

22. A vehicle, characterized in that: It comprises the return valve according to any one of claims 1 to 20 or the hydraulic suspension system according to claim 21.

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