Check valve, motor system and vehicle

Abstract

The utility model provides a check valve, a motor system and a vehicle. The check valve comprises a shell, and an inlet and an outlet are formed in the two ends of the shell correspondingly; the movable part is rotationally connected into the shell and is provided with an opening position and a closing position; and the non-return part is movably arranged in the shell, and the non-return part can be matched with the movable part, so that the movable part rotates from the opening position to the closing position, reverse flowing of fluid is prevented, and the action reliability of the non-return valve is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of control technology, and specifically relates to a check valve, a motor system and a vehicle. Background Art

[0002] As a device for controlling the unidirectional flow of fluid, check valve is widely used in various fluid control systems. In a closed flow channel, a mechanical check valve can effectively close the valve body when the fluid flows backward to achieve unidirectional flow control. However, the existing check valve design is mainly based on the environment where the fluid has a high unidirectional velocity and pressure.

[0003] However, in actual applications, the fluid in the flow channel often does not have a large one-way velocity and pressure. For example, the one-way velocity and pressure of the fluid in the motor cooling return path are small, which causes the traditional check valve to fail to work properly in these environments and easily causes oil backflow. Utility Model Content

[0004] One object of the utility model is to provide a new technical solution for a check valve, a motor system and a vehicle.

[0005] According to a first aspect of the utility model, a check valve is provided, comprising:

[0006] A shell, wherein two ends of the shell are respectively provided with an inlet and an outlet;

[0007] A movable part, the movable part is rotatably connected in the housing and has an open position and a closed position;

[0008] The check portion is movably disposed in the shell, and the check portion can cooperate with the movable portion to enable the movable portion to rotate from an open position to a closed position.

[0009] Optionally, the movable portion includes a stop structure and a counterweight structure, the stop structure is rotatably connected to the inner side of the inlet via a rotating shaft, and the counterweight structure is connected to an end of the stop structure close to the inlet.

[0010] Optionally, the counterweight structure includes a counterweight block, and the counterweight block is arranged at one end of the stop structure close to the inlet.

[0011] Optionally, the counterweight structure includes a first elastic member, one end of the first elastic member is connected to an end of the stop structure close to the inlet, and the other end of the first elastic member is connected to the inside of the housing;

[0012] When the movable portion is in the open position, the first elastic member is in a stretched state.

[0013] Optionally, the counterweight structure includes a first magnetic member, and a second magnetic member is disposed in the shell;

[0014] When the movable portion is in an open position, the first magnetic member is magnetically coupled with the second magnetic member, and when the movable portion is in a closed position, the first magnetic member is separated from the second magnetic member.

[0015] Optionally, the check portion includes a check ball, a hollow structure is formed on the outlet of the housing, and the check ball is movably arranged between the hollow structure and the inlet;

[0016] When the check ball moves toward the inlet, the check ball can push the movable part to rotate from the open position to the closed position.

[0017] Optionally, the check portion comprises a second elastic member, one end of the second elastic member is connected to an end of the stop structure away from the inlet, and the other end of the second elastic member is connected to the inside of the housing;

[0018] When the movable portion is in the open position, the second elastic member is in a stretched state.

[0019] Optionally, the non-return portion includes a slider, a slide groove is provided in the housing, and the slider is slidably matched with the slide groove;

[0020] When the slider slides along the slide groove toward the inlet, the slider can push the movable part to rotate from the open position to the closed position.

[0021] Optionally, a stop groove is provided in the shell, and when the movable part rotates from the open position to the closed position, the end of the movable part stops and cooperates with the stop groove.

[0022] Optionally, the housing comprises a first housing and a second housing, the first housing and the second housing are detachably connected to form a receiving cavity, and the check portion is disposed in the receiving cavity;

[0023] The inlet is located in the first shell, and the outlet is located in the second shell.

[0024] Optionally, a card slot is provided on the first shell, and a buckle is provided on the second shell, and the card slot is snap-fitted with the buckle.

[0025] According to a second aspect of the utility model, a motor system is provided, comprising a cooling oil circuit and the check valve described in the first aspect;

[0026] The check valve is connected in series in an inclined manner in the cooling oil circuit.

[0027] According to a third aspect of the present utility model, a vehicle is provided, comprising the motor system according to the second aspect; or,

[0028] It includes the check valve described in the first aspect.

[0029] A technical effect of the utility model is:

[0030] An embodiment of the present application provides a check valve, which includes a shell, wherein two ends of the shell respectively have an inlet and an outlet; a movable part, which is rotatably connected to the shell and has an open position and a closed position; and a check part, which is movably arranged in the shell, and the check part can cooperate with the movable part to enable the movable part to rotate from the open position to the closed position, thereby preventing the reverse flow of the fluid and ensuring the reliability of the check valve operation.

[0031] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0033] Figure 1 A three-dimensional diagram of a check valve provided in one embodiment of the utility model;

[0034] Figure 2 A cross-sectional view of a check valve provided in one embodiment of the utility model;

[0035] Figure 3 A schematic diagram of a movable portion of a check valve provided by an embodiment of the utility model being in an open position;

[0036] Figure 4 A schematic diagram of a movable portion of a check valve provided by an embodiment of the utility model being in a closed position;

[0037] Figure 5 A schematic diagram of a first housing of a check valve provided in one embodiment of the utility model;

[0038] Figure 6 A cross-sectional view of the interior of a first housing of a check valve provided by one embodiment of the utility model;

[0039] Figure 7 A schematic diagram of the interior of a first housing of a check valve provided by one embodiment of the utility model;

[0040] Figure 8 A schematic diagram of a second housing of a check valve provided by an embodiment of the utility model;

[0041] Fig. 9 A schematic diagram of the assembly structure of a first housing and a second housing of a check valve provided by an embodiment of the utility model;

[0042] Fig.10 A schematic diagram of cooling oil return of a motor system provided by an embodiment of the utility model.

[0043] Wherein: 100, check valve; 1, housing; 11, inlet; 12, outlet; 13, hollow structure; 14, first housing; 141, slot; 15, second housing; 151, buckle; 16, stopper slot; 17, boss; 2, movable part; 21, stopper structure; 22, counterweight structure; 23, rotating shaft; 3, check part;

[0044] 200. Cooling oil circuit; 300. Pump body; 400. Oil collecting tank. DETAILED DESCRIPTION

[0045] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0046] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0047] 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 application, unless otherwise specified, "plurality" 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.

[0048] In the description of the present application, 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 application 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 application.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 this application can be understood according to specific circumstances.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] Reference Figure 1 and Figure 2 , an embodiment of the present application provides a check valve, the check valve comprising:

[0052] A shell 1, with an inlet 11 and an outlet 12 at two ends of the shell 1;

[0053] The movable part 2 is rotatably connected to the housing 1 and has an open position and a closed position;

[0054] The check portion 3 is movably disposed in the housing 1 , and the check portion 3 can cooperate with the movable portion 2 to enable the movable portion 2 to rotate from an open position to a closed position.

[0055] In this embodiment, the inlet 11 and the outlet 12 on the housing 1 are respectively the fluid inlet and the fluid outlet. For example, the inlet 11 and the outlet 12 are respectively located on opposite sides of the housing 1. When the fluid flows forward from the inlet 11 to the outlet 12, the check valve can be opened normally. At this time, the movable part 2 is in the open position, and at least part of the movable part 2 is away from the inlet 11. The check valve can ensure the passage of the fluid. Figure 3As shown; since the check portion 3 is movably arranged in the housing 1, when it is necessary to prevent the fluid from flowing back, the check portion 3 moves to contact with the movable portion 2, for example, when the check portion 3 pulls or pushes the movable portion 2 to the closed position, the movable portion 2 rotates from the open position to the closed position to block the inlet 11, so that the reverse flow of the fluid can be prevented, such as Figure 4 shown.

[0056] In one embodiment, the check valve is used to check the return of cooling oil in the motor cooling oil path of the vehicle. When the cooling oil refluxes to cool the motor, the cooling oil flows from the inlet 11 to the outlet 12, and the check valve can be opened normally. At this time, the movable part 2 is in the open position, and the check valve can ensure the passage of the cooling oil to provide cooling for the motor through the cooling oil.

[0057] When the vehicle deviates or vibrates, the check part 3 can push the valve flap structure formed by the movable part 2 to close, that is, the check part 3 pushes the movable part 2 to rotate from the open position to the closed position, thereby blocking the inlet 11 through the movable part 2 to prevent the cooling oil from flowing in the opposite direction, thereby preventing the cooling oil from carrying impurities such as iron filings and flowing in the opposite direction to the motor part, thereby causing problems such as poor heat dissipation and insulation damage of the motor, thereby ensuring the safety and stability of the motor operation.

[0058] The check valve provided in the embodiment of the present application includes a shell 1, wherein the two ends of the shell 1 respectively have an inlet 11 and an outlet 12; a movable part 2, which is rotatably connected to the shell 1 and has an open position and a closed position; a check part 3, which is movably arranged in the shell 1, and the check part 3 can cooperate with the movable part 2 to make the movable part 2 rotate from the open position to the closed position to prevent the reverse flow of the fluid, thereby ensuring the reliability of the check valve operation.

[0059] In one embodiment, see Figure 2 , Figures 5 to 7 The movable part 2 includes a stop structure 21 and a counterweight structure 22 . The stop structure 21 is rotatably connected to the inner side of the inlet 11 through a rotating shaft 23 , and the counterweight structure 22 is connected to one end of the stop structure 21 close to the inlet 11 .

[0060] In this embodiment, the stop part of the stop structure 21 and the counterweight structure 22 can be located on both sides of the rotating shaft 23, so that a seesaw structure is formed on both sides of the rotating shaft 23 through the stop part of the stop structure 21 and the counterweight structure 22, and the volume or density of the counterweight structure 22 is greater than the stop part of the stop structure 21, so that the stop part of the stop structure 21 can be tilted up by the counterweight structure 22, so that the stop part of the stop structure 21 is away from the inlet 11, and the check valve can ensure the passage of the fluid, such as Figure 3As shown, the large impact force of the fluid to open the check valve is avoided, so that the fluid can pass through the check valve, and the smoothness of the forward flow of the check valve (the direction of flow from the inlet 11 to the outlet 12) is improved.

[0061] When the check valve needs to prevent the fluid from flowing back, the check portion 3 moves to contact the stop portion of the stop structure 21, such as pushing the stop portion of the stop structure 21 to rotate to block the inlet 11, so as to prevent the fluid from flowing back. Figure 4 As shown, the reliability of the check valve in preventing the reverse flow of the fluid is ensured.

[0062] In one embodiment, the counterweight structure 22 includes a counterweight block, and the counterweight block is disposed at one end of the stop structure 21 close to the inlet 11 .

[0063] In this embodiment, the counterweight block can be a metal block, the density of the counterweight block is greater than the density of the stop structure, and the center of gravity of the counterweight block is biased toward the direction in which the fluid flows in from the inlet 11, so that the counterweight block can be used to keep the movable part 2 in the open position when the fluid flows normally, thereby achieving stable opening of the check valve.

[0064] In one embodiment, the weight structure 22 includes a first elastic member, one end of which is connected to an end of the stop structure 21 close to the inlet 11, and the other end of the first elastic member is connected to the inside of the housing 1;

[0065] When the movable portion 2 is in the open position, the first elastic member is in a stretched state.

[0066] In this embodiment, the first elastic member may be a metal spring or a polymer elastic strip. When the movable part 2 is in the open position, the first elastic member is stretched to pull the movable part 2 through the stretching force of the first elastic member, so that the movable part 2 remains in the open position.

[0067] When the check part 3 is actuated and causes the movable part 2 to rotate from the open position to the closed position, the first elastic member can be further stretched. Since the action of the check part 3 is stronger than the effect of the first elastic member resisting the stretching, the movable part 2 can be kept in the closed position. Moreover, the further stretching of the first elastic member can facilitate the switching of the movable part 2 from the closed position to the open position after the check part 3 is separated from the movable part 2, thereby improving the efficiency of the check valve action.

[0068] In one embodiment, the weight structure 22 includes a first magnetic member, and a second magnetic member is disposed in the housing 1;

[0069] When the movable part 2 is in the open position, the first magnetic part and the second magnetic part are magnetically matched, and when the movable part 2 is in the closed position, the first magnetic part and the second magnetic part are separated.

[0070] In this embodiment, when the movable part 2 is in the open position, the first magnetic part and the second magnetic part cooperate with each other by magnetic attraction, so as to pull the movable part 2 by the magnetic attraction force of the first magnetic part and the second magnetic part, so that the movable part 2 is kept in the open position. When the check part 3 is actuated and the movable part 2 is rotated from the open position to the closed position, the first magnetic part and the second magnetic part are separated, so that the movable part 2 can be kept in the closed position; and the magnetic attraction of the first magnetic part and the second magnetic part can facilitate the switching of the movable part 2 from the closed position to the open position after the check part 3 is separated from the movable part 2.

[0071] In one embodiment, see Figure 3 and Figure 4 The check portion 3 includes a check ball, a hollow structure 13 is formed on the outlet 12 of the housing 1, and the check ball is movably arranged between the hollow structure 13 and the inlet 11;

[0072] When the check ball moves toward the inlet 11 , the check ball can push the movable part 2 to rotate from the open position to the closed position.

[0073] In this embodiment, the check valve can be installed at a small angle to the horizontal plane, such as Figure 3 The middle check valve is inclined at an angle α to the horizontal plane. The check valve is inclined so that the left side is lower and the right side is higher, so that the gravity of the check ball and the pressure of the forward flow of the fluid can push the check ball back to the left bottom of the cavity in the shell 1. At this time, the movable part 2 is in the open position, the check valve is open and ensures the smooth forward flow of the fluid.

[0074] The hollow structure 13 is located at the outlet 12 on the left side of the shell 1. On the one hand, the hollow structure 13 can ensure that the forward flow of the fluid is not affected. On the other hand, it can keep the check ball inside the shell 1 when the fluid flows normally without affecting the movable part 2 in the open position.

[0075] When the fluid may flow in the reverse direction, the check ball is subjected to a force exerted by the fluid in the same direction as the reverse flow, and the check ball can roll toward the stop structure 21. The material of the check ball can be oil-corrosion-resistant material and the radius of the check ball is larger than the height of the stop structure 21 when it is opened, so that the check ball can push the stop structure 21 to close the inlet 11, thereby achieving the purpose of preventing reverse flow.

[0076] In one embodiment, the check valve is used to check the cooling oil in the motor cooling oil path of the vehicle. When the vehicle resumes normal driving, since the cooling oil channel has a certain small slope, the axis of the check valve during installation is consistent with the extension direction of the cooling oil channel, so that the check valve can be inclined at a small angle with the horizontal plane, which facilitates the separation of the check part 3 and the movable part 2 and keeps the movable part 2 in the open position.

[0077] In one embodiment, the check ball is a hollow metal sphere to enhance its oil corrosion resistance while achieving lightweight of the check valve.

[0078] In one embodiment, the check portion 3 includes a second elastic member, one end of the second elastic member is connected to an end of the stop structure 21 away from the inlet 11, and the other end of the second elastic member is connected to the inside of the housing 1;

[0079] When the movable portion 2 is in the open position, the second elastic member is in a stretched state.

[0080] In this embodiment, the second elastic member can be a metal spring or a polymer elastic strip. When the movable part 2 is in the open position, the second elastic member is stretched; when the check part 3 is actuated and the movable part 2 is rotated from the open position to the closed position, the second elastic member can be reset to a natural extended state or a compressed state, so that the movable part 2 can remain in the closed position.

[0081] In one embodiment, the check portion 3 includes a slider, a slide groove is provided in the housing 1, and the slider is slidably matched with the slide groove;

[0082] When the slider slides along the slide groove toward the inlet 11 , the slider can push the movable portion 2 to rotate from the open position to the closed position.

[0083] In this embodiment, the setting of the slide groove can provide guidance for the sliding of the slider and ensure the directional stability of the sliding of the slider; when the slider slides along the slide groove toward the inlet 11, for example, the slider is subjected to a force exerted by the fluid in the same direction as the reverse flow, the slider can slide toward the stop structure 21, so that the slider pushes the stop structure 21 to close the inlet 11, thereby achieving the purpose of preventing reverse flow.

[0084] In one embodiment, see Figure 4 A stop groove 16 is provided in the housing 1 , and when the movable part 2 rotates from the open position to the closed position, the end of the movable part 2 stops and cooperates with the stop groove 16 .

[0085] In this embodiment, the movable part 2 can rotate in the shell 1 to achieve the switching of the movable part 2 between the open position and the closed position; and when the check part 3 is actuated and causes the movable part 2 to rotate from the open position to the closed position, in order to avoid excessive rotation of the movable part 2 and cause a gap between the movable part 2 and the inlet 11, and to ensure the stability of the movable part 2 in the closed position, the end of the movable part 2 can be stopped by the stop groove 16 to limit the movable part 2 from continuing to rotate after rotating from the open position to the closed position, thereby ensuring that the movable part 2 blocks the inlet 11 to achieve the stability of the check efficiency of the check valve.

[0086] In one embodiment, see Figure 3The housing 1 includes a first housing 14 and a second housing 15, the first housing 14 and the second housing 15 are detachably connected to form a receiving cavity, and the check portion 3 is disposed in the receiving cavity;

[0087] The inlet 11 is located in the first housing 14 , and the outlet 12 is located in the second housing 15 .

[0088] In this embodiment, when the fluid flows forward from the inlet 11 to the outlet 12, the check valve can be opened normally. At this time, the movable part 2 is in the open position, and the forward flow of the fluid in the accommodating chamber can push the check part 3 away from the inlet 11, and the check valve can ensure the passage of the fluid; and because the check part 3 is movably arranged in the shell 1, when it is necessary to prevent the fluid from flowing back, the reverse flow of the fluid in the accommodating chamber drives the check part 3 to move, and the check part 3 pushes the movable part 2 to rotate from the open position to the closed position. The movable part 2 blocks the inlet 11, so that the flow of the fluid can be checked, thereby ensuring the stability of the check valve operation.

[0089] In one embodiment, see Figure 8 and Fig. 9 A card slot 141 is provided on the first shell 14, and a buckle 151 is provided on the second shell 15. The card slot 141 and the buckle 151 are engaged with each other, so that the first shell 14 and the second shell 15 are tightly connected to form a accommodating cavity, avoiding the formation of a gap between the first shell 14 and the second shell 15 at the connection position.

[0090] In this embodiment, when the check valve is installed, the check ball is first placed in the hollow structure 13 of the second shell 15, and the elastic buckle 151 on the second shell 15 is engaged with the slot 141 on the first shell 14 to connect the hollow cavity in the hollow structure 13 with the space in the first shell 14, and the raised portion on the hollow structure 13 and the corresponding groove portion of the first shell 14 can form a positioning, so that the shape of the hollow cavity can fit with the first shell 14, thereby ensuring the structural integrity of the check valve.

[0091] In one embodiment, see, 10, an embodiment of the present application provides a motor system, the motor system includes a cooling oil circuit 200 and the above-mentioned check valve 100;

[0092] The check valve 100 is connected in series in an inclined manner in the cooling oil circuit 200 .

[0093] In this embodiment, the motor includes a pump body 300 and an oil collecting tank 400, the pump body 300 and the oil collecting tank 400 are arranged in the cooling oil circuit 200, the check valve 100 is arranged between the pump body 300 and the oil collecting tank 400, and can make the cooling oil in the oil collecting tank 400 flow back to the pump body 300.

[0094] When the motor system is designed, the return cooling oil circuit 200 has a certain slope. Similarly, after the check valve 100 is installed, the return oil cavity of the check valve 100 is aligned with the cooling oil circuit 200 and tilted, so that there should be a certain slope between the cooling oil flow inlet and outlet of the check valve 100, so that the check part 3 can be located at the hollow structure 13 under the action of gravity and the reflux of the cooling oil, and when the cooling oil flows back, the check part 3 can move to the stop structure 21 and make the movable part 2 close the inlet 11.

[0095] In one embodiment, see Figure 6 The housing 1 is provided with a connecting boss 17, which is positioned and installed at the notch of the oil collecting tank 400 of the motor. The pump body 300 pumps the cooling oil into the cooling oil circuit 200 of the motor. After cooling the motor components, the cooling oil in the cooling oil circuit 200 flows back to the oil collecting tank 400 at the gear box. The cooling oil in the oil collecting tank 400 flows back to the pump body 300 through the check valve 100, completing the circulation of the cooling oil in the motor cooling circuit.

[0096] When the cooling oil flows through the cooling oil passage 200 to the pump body 300, Fig.10 When the oil flows from right to left, due to the operation of the pump body 300 and the pressure difference formed by the cooling oil on both sides of the movable part 2, and the existence of the counterweight structure 22, the movable part 2 will be opened when the cooling oil flows in the forward direction. The flow of the cooling oil and the slope of the cavity will place the check ball at the bottom of the hollow structure 13. Since the diameter of the check ball is smaller than the inner diameter of the oil channel in the hollow structure 13, the check ball will not block the hollow structure 13, and the cooling oil can flow normally from the oil collecting tank 400 to the pump body 300. At this time, the cooling oil completes the entire cycle normally.

[0097] When the vehicle deviates or vibrates and the cooling oil tends to flow back to the oil collecting tank 400, the check ball and the cooling oil will be subjected to a force from left to right. At this time, the check ball is subjected to the force and rolls toward the movable part 2. The check ball squeezes the movable part 2 and causes the movable part 2 to rotate from the open position to the closed position, thereby achieving the effect of checking the cooling oil.

[0098] When the electric vehicle is running normally, the state of the check valve 100 will return to the open state. Due to the inclination of the oil return cavity in the check valve 100 and the oil pressure differential caused by the pump body 300, the check ball will return to the bottom of the hollow structure 13, and the movable part 2 will be in the open position again due to the counterweight structure 22, so as to ensure the positive flow of the cooling oil, that is, the cooling oil flows from the oil collecting tank 400 through the check valve 100 to the pump body 300, and then is pumped into the cooling oil circuit 200 of the motor and then flows into the oil collecting tank 400, completing the circulation of the cooling oil.

[0099] An embodiment of the present application provides a vehicle, the vehicle comprising the above-mentioned motor system; or,

[0100] It includes the check valve 100 mentioned above.

[0101] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A check valve, characterized in that: include: A housing (1), wherein two ends of the housing (1) respectively have an inlet (11) and an outlet (12); A movable part (2), the movable part (2) is rotatably connected to the housing (1) and has an open position and a closed position; A check portion (3), the check portion (3) being movably arranged in the housing (1), and the check portion (3) being capable of cooperating with the movable portion (2) so as to enable the movable portion (2) to rotate from an open position to a closed position.

2. The check valve according to claim 1, characterized in that: The movable part (2) comprises a stop structure (21) and a counterweight structure (22); the stop structure (21) is rotatably connected to the inner side of the inlet (11) via a rotating shaft (23); and the counterweight structure (22) is connected to one end of the stop structure (21) close to the inlet (11).

3. The check valve according to claim 2, characterized in that: The counterweight structure (22) comprises a counterweight block, and the counterweight block is arranged at one end of the stop structure (21) close to the inlet (11).

4. The check valve according to claim 2, characterized in that: The counterweight structure (22) comprises a first elastic member, one end of the first elastic member is connected to an end of the stop structure (21) close to the inlet (11), and the other end of the first elastic member is connected to the inside of the housing (1); When the movable portion (2) is in the open position, the first elastic member is in a stretched state.

5. The check valve according to claim 2, characterized in that: The counterweight structure (22) comprises a first magnetic component, and a second magnetic component is arranged in the shell (1); When the movable part (2) is in an open position, the first magnetic part and the second magnetic part are magnetically matched, and when the movable part (2) is in a closed position, the first magnetic part and the second magnetic part are separated.

6. The check valve according to claim 1, characterized in that: The check portion (3) comprises a check ball, a hollow structure (13) is formed on the outlet (12) of the housing (1), and the check ball is movably arranged between the hollow structure (13) and the inlet (11); When the check ball moves toward the inlet (11), the check ball can push the movable part (2) to rotate from an open position to a closed position.

7. The check valve according to claim 2, characterized in that: The check portion (3) comprises a second elastic member, one end of the second elastic member is connected to an end of the stop structure (21) away from the inlet (11), and the other end of the second elastic member is connected to the inside of the housing (1); When the movable portion (2) is in the open position, the second elastic member is in a stretched state.

8. The check valve according to claim 1, characterized in that: The non-return portion (3) comprises a sliding block, a sliding groove is provided in the housing (1), and the sliding block is slidably matched with the sliding groove; When the slider slides along the slide groove toward the inlet (11), the slider can push the movable part (2) to rotate from an open position to a closed position.

9. The check valve according to claim 1, characterized in that: A stop groove (16) is provided in the housing (1), and when the movable part (2) rotates from an open position to a closed position, the end of the movable part (2) stops and cooperates with the stop groove (16).

10. The check valve according to claim 1, characterized in that: The housing (1) comprises a first housing (14) and a second housing (15); the first housing (14) and the second housing (15) are detachably connected to form a receiving cavity; the check portion (3) is arranged in the receiving cavity; The inlet (11) is located in the first shell (14), and the outlet (12) is located in the second shell (15).

11. The check valve according to claim 10, characterized in that: The first shell (14) is provided with a card slot (141), and the second shell (15) is provided with a buckle (151), and the card slot (141) and the buckle (151) are engaged with each other.

12. A motor system, characterized in that: It comprises a cooling oil circuit (200) and a check valve (100) according to any one of claims 1 to 11; The check valve is connected in series in an inclined manner in the cooling oil circuit (200).

13. A vehicle, characterized in that: A motor system comprising the motor system of claim 12; or The invention comprises the check valve (100) as claimed in any one of claims 1 to 11.

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