One-way valve, shock absorber, suspension system and vehicle

Abstract

The utility model discloses a one-way valve, a shock absorber, a suspension system and a vehicle. The one-way valve comprises a valve body and a valve plate. The valve body is provided with a circulation cavity, a through hole and a protruding part, and the protruding part protrudes and extends into the circulation cavity from the bottom wall of the circulation cavity. The valve plate is movably arranged in the circulation cavity, the cross section of the protruding part is gradually reduced in the direction from the bottom wall to the valve plate, and the valve plate is used for being matched with the protruding part to selectively open or close communication between the through hole and the circulation cavity. According to the one-way valve, compared with the situation that the cross section of the protruding part is kept unchanged in the direction from the bottom wall to the valve plate, the area S of the sealing face between the valve plate and the protruding part is smaller, so that the oil adhesive force between the valve body and the valve plate can be reduced, and the opening response speed of the one-way valve is increased; the phenomenon of clearance collision between a piston of the shock absorber and oil caused by untimely oil compensation is prevented, then abnormal acceleration fluctuation of a piston rod of the shock absorber can be avoided, vibration noise is reduced or even eliminated, and the user experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, and more particularly to a one-way valve, a shock absorber, a suspension system and a vehicle. BACKGROUND

[0002] In the related art, the wheel area of a vehicle is usually provided with a shock absorber, which can improve the smoothness of the vehicle in driving. Generally, the shock absorber, such as a cylinder type hydraulic shock absorber, includes a one-way valve for ensuring oil flow or compensation function, and the one-way valve adopts a valve body and a valve plate to cooperate for oil sealing. However, due to the large oil adhesion force between the valve body and the valve plate, the opening response of the one-way valve is poor, and the oil compensation is not timely, which will cause abnormal fluctuation of the piston rod acceleration of the shock absorber and generate vibration noise. SUMMARY

[0003] The present application provides a one-way valve, a shock absorber, a suspension system and a vehicle to solve at least one of the above technical problems.

[0004] The one-way valve of the present application includes a valve body and a valve plate. The valve body is provided with a flow-through cavity and a through hole, and the valve body is further provided with a protruding portion which protrudes and extends into the flow-through cavity from the bottom wall of the flow-through cavity. The valve plate is movably arranged in the flow-through cavity, and the cross section of the protruding portion gradually decreases in the direction from the bottom wall to the valve plate, and the valve plate is used to cooperate with the protruding portion to selectively open or close the communication between the through hole and the flow-through cavity.

[0005] In some embodiments, the valve plate (30) is configured to be capable of contacting one of the protruding portions (11) and forming a sealing surface, wherein S≤30mm 2 , S is the area of the sealing surface.

[0006] In some embodiments, S≥2mm 2 .

[0007] In some embodiments, the protruding portion includes two, and the two protruding portions are distributed in the radial direction of the valve body, and the through hole is arranged between the two protruding portions.

[0008] In some embodiments, in the radial direction of the valve body, the valve plate is configured to be capable of contacting two of the protruding portions and forming a first sealing surface and a second sealing surface respectively; the first sealing surface includes a first edge and a second edge opposite to each other, the second sealing surface includes a third edge and a fourth edge opposite to each other, the first sealing surface is closer to the center of the valve plate than the second sealing surface, the first edge is closer to the center of the valve plate than the second edge, and the third edge is closer to the center of the valve plate than the fourth edge.

[0009] In some embodiments, S1 = π(r2 2 -r1 2 ); S2 = π(r4 2 -r3 2 ); wherein r1 is the distance between the first side in the radial direction and the center of the valve plate; r2 is the distance between the second side in the radial direction and the center of the valve plate; r3 is the distance between the third side in the radial direction and the center of the valve plate; and r4 is the distance between the fourth side in the radial direction and the center of the valve plate.

[0010] In some embodiments,

[0011]

[0012] wherein r1 is the distance between the first side in the radial direction and the center of the valve plate; r2 is the distance between the second side in the radial direction and the center of the valve plate; r3 is the distance between the third side in the radial direction and the center of the valve plate; and r4 is the distance between the fourth side in the radial direction and the center of the valve plate.

[0013] In some embodiments, the one-way valve further comprises an elastic member, at least a portion of the elastic member is disposed in the flow cavity, and the elastic member is configured to provide an elastic force to the valve plate in a direction from the valve plate to the protrusion.

[0014] In some embodiments, the valve plate comprises a first side and a second side opposite to each other, and the first side of the valve plate is opposite to the through hole;

[0015] The valve plate opens the through hole when the force on the valve plate satisfies the following formula:

[0016] [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 ]-F1≥0;

[0017] The valve plate closes the through hole when the force on the valve plate satisfies the following formula:

[0018] [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 ]-F1≤0;

[0019] P1*r1 + P2*r2 = F1*r3 + F2*r4 wherein, P1 is the pressure of the first side of the valve plate; P2 is the pressure of the second side of the valve plate; r1 is the distance between the first edge and the center of the valve plate in the radial direction; r2 is the distance between the second edge and the center of the valve plate in the radial direction; r3 is the distance between the third edge and the center of the valve plate in the radial direction; r4 is the distance between the fourth edge and the center of the valve plate in the radial direction; F1 is the elastic force.

[0020] In some embodiments, the elastic force is greater than or equal to 5N and less than or equal to 10N.

[0021] In some embodiments, the protrusion comprises a matching surface for matching with the valve plate and a circumferential surface connecting the matching surface and the bottom wall of the flow passage, the circumferential surface being a curved surface or an inclined surface; wherein, h>x, h is the distance between the valve plate and the valve body when the valve plate matches with the matching surface; x is the distance between the connection between the circumferential surface and the bottom wall of the flow passage and the center of the matching surface in the radial direction of the valve body.

[0022] In some embodiments, the valve body is further provided with a through hole in communication with the flow passage, the through hole being used for the fluid in the flow passage to flow out.

[0023] The shock absorber of the embodiments of the present application comprises the one-way valve of the above-mentioned embodiments.

[0024] The suspension system of the embodiments of the present application comprises the shock absorber of the above-mentioned embodiments.

[0025] The vehicle of the embodiments of the present application comprises the suspension system of the above-mentioned embodiments.

[0026] In the one-way valve, the shock absorber, the suspension system and the vehicle of the embodiments of the present application, the valve body is provided with a protrusion, and the cross section of the protrusion gradually decreases in the direction from the bottom wall to the valve plate, thereby, compared with the case where the cross section of the protrusion remains unchanged in the direction from the bottom wall to the valve plate, the sealing surface area between the valve plate and the protrusion is smaller, so that the oil adhesion between the valve body and the valve plate can be reduced, the opening response speed of the one-way valve is improved, that is, the speed of opening the communication between the through hole and the flow passage of the one-way valve is improved, the gap collision phenomenon between the piston and the oil of the shock absorber caused by the untimely compensation of the oil is prevented, and then the abnormal fluctuation of the piston rod acceleration of the shock absorber can be avoided, the vibration noise can be reduced or even eliminated, and the user experience is improved.

[0027] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is a schematic structural diagram of a vehicle according to certain embodiments of the present application;

[0030] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of a one-way valve of a shock absorber in a vehicle shown;

[0031] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of the one-way valve shown;

[0032] Figure 4 yes Figure 3 A magnified schematic diagram of position IV in the middle;

[0033] Figure 5 yes Figure 2 Schematic diagram of the planar structure of the one-way valve shown;

[0034] Figure 6 is a schematic diagram of a damping force curve of a shock absorber under triangular wave displacement excitation in certain embodiments of the present application;

[0035] Figure 7 yes Figure 6 Schematic diagram of damping force fluctuation at position VII under different sealing surface areas.

[0036] Description of main component symbols:

[0037] 600 vehicles; 500 suspension systems; 400 bodies; 300 wheels; 210 shock absorbers; 230 suspensions;

[0038] 100 one-way valve;

[0039] 10 valve body, 101 flow cavity, 1011 bottom wall, 103 through hole, 105 through hole, 11 protrusion, 111 mating surface, 113 side surface;

[0040] 30 valve plate, 31 first side, 33 second side; 50 elastic member. DETAILED DESCRIPTION

[0041] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0042] In the description of the present application, it needs to be understood that the terms "center", "length", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0044] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0046] Please refer to Figure 1 The vehicle 600 of the embodiment of the present application includes a suspension system 500, wherein the vehicle 600 includes but is not limited to a passenger vehicle such as a pure electric vehicle, a hybrid vehicle, etc., or a large engineering vehicle with not very harsh working conditions, etc.

[0047] Further, in some embodiments, the vehicle 600 further comprises a vehicle body 400 and a wheel 300, the wheel 300 is arranged on the vehicle body 400 and is movable relative to the vehicle body 400 to realize the movement (e.g. forward, backward or steering, etc.) of the vehicle 600. One end of the suspension system 500 is connected with the vehicle body 400, and the other end is connected with the wheel 300, the suspension system 500 is capable of adjusting the relative distance between the vehicle body 400 and the wheel 300 to improve the smoothness of the vehicle 600.

[0048] In the present embodiment, the vehicle 600 comprises the suspension system 500, and it can be understood that the vehicle 600 at least comprises the same beneficial effects as the suspension system 500. Therefore, the beneficial effects of the vehicle 600 are described below in the beneficial effects of the suspension system 500.

[0049] Please continue to refer to Figure 1 The suspension system 500 of the present embodiment comprises a shock absorber 210.

[0050] The shock absorber 210 is a device capable of absorbing vibration energy and accelerating vibration attenuation in the suspension system 500. In some embodiments of the present application, the suspension system 500 further comprises a suspension 230, the suspension 230 connects the vehicle body 400 and the wheel 300, and the shock absorber 210 is connected with the suspension 230. In the case that the wheel 300 is subjected to an impact force, the impact force can be transmitted through the suspension 230, and in this case, the shock absorber 210 can generate a damping force, which can offset or weaken the impact force, so as to reduce the impact force transmitted to the vehicle body 400, thereby improving the driving stability and ride comfort of the vehicle 600.

[0051] Specifically, in some embodiments, the shock absorber 210 comprises a cylinder and a piston arranged in the cylinder, the cylinder contains a fluid (e.g. oil, etc.), and the piston can separate the cavity inside the cylinder into a compression chamber and a recovery chamber, and the piston is connected with the suspension 230 through a piston rod. When the piston rod drives the piston to move up and down, the fluid can flow between the compression chamber and the recovery chamber and generate a damping force, thereby realizing the damping function.

[0052] In the present embodiment, the suspension system 500 comprises the shock absorber 210, and it can be understood that the suspension system 500 at least comprises the same beneficial effects as the shock absorber 210. Therefore, the beneficial effects of the suspension system 500 are described below in the beneficial effects of the shock absorber 210.

[0053] Please refer to Figure 1 and Figure 2The damper 210 of the embodiment of the present application comprises the check valve 100. Specifically, in some embodiments, the damper 210 further comprises a solenoid valve connected with the check valve 100. In this case, the fluid can flow between the compression chamber and the recovery chamber through the solenoid valve and the check valve 100.

[0054] For example, when the vehicle 600 is running, the wheel 300 is impacted by the road surface, the wheel 300 jumps up, at this time, the suspension 230 can move upward together with the wheel 300, in this case, the piston rod of the damper 210 moves downward and drives the piston to move downward, the fluid in the compression chamber can flow to the recovery chamber at least through the orifice valve system (including the solenoid valve and the check valve 100, etc.), thereby generating a damping force to buffer the vibration of the suspension 230 and improve the driving performance of the vehicle 600; in the case of the wheel 300 jumping down, the suspension 230 can move downward together with the wheel 300, in this case, the piston rod of the damper 210 moves upward and drives the piston to move upward, the fluid in the recovery chamber can flow to the compression chamber at least through the orifice valve system (including the solenoid valve and the check valve 100, etc.), thereby generating a damping force to buffer the vibration of the suspension 230 and improve the driving performance of the vehicle 600.

[0055] In some embodiments, the vehicle 600 can further comprise a detection device capable of detecting information such as the road surface state, the speed of the vehicle 600 and the acceleration of the vehicle 600, and adjusting the size of the electromagnetic force according to the information, thereby controlling the flow of the fluid, and further realizing adjustable damping force, effectively meeting the demand for driving comfort of the vehicle 600.

[0056] In this embodiment, the damper 210 comprises the check valve 100, and it can be understood that the damper 210 at least comprises the same beneficial effects as the check valve 100, therefore, the beneficial effects of the damper 210 please refer to the beneficial effects of the check valve 100 introduced below.

[0057] Please refer to Figure 2 and Figure 3 The check valve 100 of the embodiment of the present application comprises a valve body 10 and a valve sheet 30, the valve body 10 is further provided with a protruding part 11 protruding and extending into the flow-through cavity 101 from the bottom wall 1011 of the flow-through cavity 101. The valve body 10 is provided with a flow-through cavity 101 and a through hole 103. The valve sheet 30 is movably arranged in the flow-through cavity 101, in the direction from the bottom wall 1011 to the valve sheet 30, the cross section of the protruding part 11 gradually decreases, and the valve sheet 30 is used to cooperate with the protruding part 11 to selectively open or close the communication between the through hole 103 and the flow-through cavity 101. It should be noted that in some embodiments, the direction from the bottom wall 1011 to the valve sheet 30 is parallel to the axial direction X of the valve body 10.

[0058] The valve body 10 is a structure for loading and protecting the valve disc 30 and other devices in the one-way valve 100. The material of the valve body 10 includes but is not limited to cast iron, cast steel, stainless steel, etc. For example, the material of the valve body 10 includes cast iron, which has good mechanical properties and corrosion resistance, so that the valve body 10 can be suitable for various fluids and working environments. In some embodiments of the present application, the cross section of the protrusion 11 gradually decreases in the direction from the bottom wall 1011 to the valve disc 30, and the protrusion 11 is generally in a conical structure. In this way, compared with the case where the cross section of the protrusion 11 remains unchanged in the direction from the bottom wall 1011 to the valve disc 30, the sealing surface formed by the contact between the valve disc 30 and the protrusion 11 is smaller, that is, the sealing between the valve disc 30 and the protrusion 11 can be changed from a surface type sealing to a linear type sealing, or from a surface type sealing to an approximately linear type sealing, so that the sealing effect of the valve disc 30 can be ensured while reducing the oil adhesion between the valve body 10 and the valve disc 30.

[0059] Please refer to Figure 5 In some embodiments, the through hole 103 includes one or more. In the case where the through hole 103 includes multiple, the multiple through holes 103 are uniformly spaced on the valve body 10; or, the multiple through holes 103 are non-uniformly spaced on the valve body 10.

[0060] Specifically, in one embodiment, the through hole 103 includes one, and the cross-sectional shape of the through hole 103 is generally annular. The valve body 10 is provided with two protrusions 11, which are spaced apart along the radial direction Y of the valve body 10, and the through hole 103 is located between the two protrusions 11. The cross-sectional shape of the protrusion 11 is generally annular. In another embodiment, the through hole 103 includes multiple, and the cross-sectional shape of the multiple through holes 103 includes but is not limited to circular, square, and racetrack-shaped, etc. The valve body 10 is provided with two protrusions 11, which are spaced apart along the radial direction Y of the valve body 10, and the multiple through holes 103 are located between the two protrusions 11. The cross-sectional shape of the protrusion 11 is generally annular. In still another embodiment, the through hole 103 includes multiple, and the cross-sectional shape of the multiple through holes 103 includes but is not limited to circular, square, and racetrack-shaped, etc. The valve body 10 is provided with multiple protrusions, which all protrude from the bottom wall 1011 of the flow cavity 101 into the flow cavity 101 and surround the multiple through holes 103, respectively. The opposite sides of the protrusion in the radial direction Y are configured as the two protrusions 11 in the above-mentioned embodiments, and the cross-sectional shape of the protrusion is generally the same as that of the through hole 103.

[0061] For ease of understanding, the following embodiments are described by way of example with the through hole 103 including multiple, the valve body 10 being provided with two protrusions 11, which are spaced apart along the radial direction Y of the valve body 10, and the through hole 103 being located between the two protrusions 11.

[0062] The valve piece 30 is a structure in the one-way valve 100 for cooperating with the protrusion 11 to control the opening or closing of the through hole 103. The material of the valve piece 30 includes but is not limited to metal or ceramic, etc. In some embodiments of the present application, the cross section of the valve piece 30 is substantially the same as that of the flow passage 101, so as to ensure the stability of the valve piece 30 moving in the flow passage 101 relative to the valve body 10. For example, the valve piece 30 can be a ring structure. In the case that the valve piece 30 moves relative to the valve body 10 in a direction away from the bottom wall 1011 of the flow passage 101, the valve piece 30 can open the through hole 103, in which case the through hole 103 is in communication with the flow passage 101, and the fluid can flow into the flow passage 101 through the through hole 103; in the case that the valve piece 30 moves relative to the valve body 10 in a direction close to the bottom wall 1011 of the flow passage 101 and contacts the protrusion 11, the valve piece 30 can close the through hole 103, in which case the through hole 103 is not in communication with the flow passage 101, and the fluid cannot flow into the flow passage 101 through the through hole 103. It should be noted that in some embodiments, the fluid includes but is not limited to oil (such as hydraulic oil) or magnetorheological fluid, etc.; the direction in which the valve piece 30 moves relative to the valve body 10 is the same as the axial direction X of the valve body 10.

[0063] In some embodiments, the valve piece 30 is configured to be able to contact and form a sealing surface with one protrusion 11, wherein S≤30mm 2 , S is the area of the sealing surface. It should be noted that in some embodiments, the sealing surface between the valve piece 30 and the protrusion 11 can be a contact surface between the valve piece 10 and the protrusion 11 for preventing fluid leakage.

[0064] wherein S≤30mm 2 , so as to ensure that a linear sealing is formed between the valve piece 30 and the protrusion 11; or a linear sealing is substantially formed, so as to be able to reduce the oil adhesion between the valve body 10 and the valve piece 30 while ensuring the sealing effect of the valve piece 30, improve the opening response speed of the one-way valve 100, prevent the gap collision phenomenon between the piston of the shock absorber 210 and the oil due to the untimely compensation of the oil, and thus avoid the abnormal fluctuation of the piston rod acceleration of the shock absorber 210, reduce or even eliminate the vibration noise, and improve the user experience.

[0065] Further, in some embodiments, S≥2mm 2 . It should be noted that in some embodiments, the area S of the sealing surface can be 2mm 2 , 4mm 2 , 6mm 2 , 8mm 2 , 10mm 2 , 12mm 2 , 14mm2 , 16mm 2 , 18mm 2 , 20mm 2 , 22mm 2 , 24mm 2 , 26mm 2 , 28mm 2 and 30mm 2 , or any value between any two values.

[0066] In some embodiments of the present application, 2mm 2 ≤ S ≤ 30mm 2 , thereby avoiding excessive contact stress between the valve plate 30 and the valve body 10 due to too small contact area between the valve plate 30 and the valve body 10, reducing the possibility of contact damage to the valve plate 30 or the valve body 10, and prolonging the service life of the one-way valve 100; on the other hand, it can reduce the oil adhesion between the valve body 10 and the valve plate 30, thereby improving the opening response speed of the one-way valve 100, preventing the piston of the shock absorber 210 from colliding with the oil due to insufficient oil compensation, thereby avoiding abnormal fluctuations in the acceleration of the piston rod of the shock absorber 210, reducing or even eliminating vibration noise, and improving user experience.

[0067] In some embodiments of the present application, the protrusions 11 include two, the two protrusions 11 are distributed along the radial direction Y of the valve body 10 (perpendicular to the axial direction X of the valve body 10), and the through hole 103 is arranged between the two protrusions 11. The valve plate 30 is configured to be in contact with the two protrusions 11 and form a first sealing surface and a second sealing surface, respectively. It should be noted that in some embodiments, the first sealing surface can be the contact surface between one of the two protrusions 11 and the valve plate 10 for preventing fluid leakage; the second sealing surface can be the contact surface between the other of the two protrusions 11 and the valve plate 10 for preventing fluid leakage. It can be understood that the first sealing surface and the second sealing surface are only distinguished from the sealing surface, and they are not necessarily different from the sealing surface.

[0068] Specifically, in some embodiments, when the valve plate 30 moves relative to the valve body 10 and is in contact with the two protrusions 11, the valve plate 30 can close the communication between the through hole 103 and the flow passage 101; when the valve plate 30 moves relative to the valve body 10 and is spaced apart from the two protrusions 11, the valve plate 30 can open the communication between the through hole 103 and the flow passage 101. It can be understood that in the axial direction X of the valve body 10, the heights of the two protrusions 11 are the same, so that the valve plate 30 can be in contact with the two protrusions 11 at the same time, and the sealing effect of the valve plate 30 is improved.

[0069] More specifically, in some embodiments, S1≤30mm2 ; or, S2≤30mm 2 , S1 is the area of the first sealing surface; and S2 is the area of the second sealing surface.

[0070] wherein, if S1 or S2 is greater than 30mm 2 , the contact area between the valve disc 30 and the valve body 10 is too large, which will result in a large oil adhesion force between the valve disc 30 and the valve body 10, poor opening response of the check valve 100, and untimely oil compensation, thereby causing abnormal fluctuation of the piston rod acceleration of the shock absorber 210 and generating vibration noise. In the present application, S1≤30mm 2 ; or, S2≤30mm 2 , which can ensure that the valve disc 30 and the convex portion 11 form a linear sealing; or, approximately form a linear sealing, so as to reduce the oil adhesion force between the valve body 10 and the valve disc 30, improve the opening response speed of the check valve 100, prevent the piston of the shock absorber 210 from colliding with the oil due to untimely oil compensation, thereby avoiding abnormal fluctuation of the piston rod acceleration of the shock absorber 210, reducing or even eliminating vibration noise, and improving user experience.

[0071] Further, S1≥2mm 2 . It should be noted that, in some embodiments, the area S1 of the first sealing surface can be any one value or any numerical value between any two values in the range of 2mm 2 , 4mm 2 , 6mm 2 , 8mm 2 , 10mm 2 , 12mm 2 , 14mm 2 , 16mm 2 , 18mm 2 , 20mm 2 , 22mm 2 , 24mm 2 , 26mm 2 , 28mm 2 , and 30mm 2 .

[0072] If S1 is less than 2mm 2 , the contact area between the valve disc 30 and the convex portion 11 is too small, which will result in excessive contact stress between the valve disc 30 and the valve body 10, causing damage to the valve disc 30 or the valve body 10, and affecting the service life of the check valve 100. In combination with the above, in some embodiments of the present application, 2mm 2 ≤S1≤30mm 2Therefore, the contact area between the valve disc 30 and the valve body 10 can be avoided to be too small, so that the contact stress between the valve disc 30 and the valve body 10 can be avoided to be too large, thereby reducing the possibility of damage of the valve disc 30 or the valve body 10, prolonging the service life of the check valve 100; on the other hand, the adhesion of the oil between the valve body 10 and the valve disc 30 can be reduced, thereby improving the opening response speed of the check valve 100, preventing the piston of the shock absorber 210 from colliding with the oil due to the delay of the oil compensation, thereby avoiding the abnormal fluctuation of the acceleration of the piston rod of the shock absorber 210, reducing or even eliminating the vibration noise, and improving the user experience.

[0073] Similarly, in some embodiments of the present application, S2≥2mm 2 It should be noted that in some embodiments, the area S2 of the second sealing surface can be any one of 2mm 2 , 4mm 2 , 6mm 2 , 8mm 2 , 10mm 2 , 12mm 2 , 14mm 2 , 16mm 2 , 18mm 2 , 20mm 2 , 22mm 2 , 24mm 2 , 26mm 2 , 28mm 2 and 30mm 2 or any value between any two values.

[0074] If S2 is less than 2mm 2 , the contact area between the valve disc 30 and the convex portion 11 is too small, so that the contact stress between the valve disc 30 and the valve body 10 will be too large, causing damage to the valve disc 30 or the valve body 10, affecting the service life of the check valve 100. As known from the above, in some embodiments of the present application, 2mm 2 ≤S2≤30mm 2 , thereby avoiding the contact area between the valve disc 30 and the valve body 10 to be too small, so that the contact stress between the valve disc 30 and the valve body 10 can be avoided to be too large, thereby reducing the possibility of damage of the valve disc 30 or the valve body 10, prolonging the service life of the check valve 100; on the other hand, the adhesion of the oil between the valve body 10 and the valve disc 30 can be reduced, thereby improving the opening response speed of the check valve 100, preventing the piston of the shock absorber 210 from colliding with the oil due to the delay of the oil compensation, thereby avoiding the abnormal fluctuation of the acceleration of the piston rod of the shock absorber 210, reducing or even eliminating the vibration noise, and improving the user experience.

[0075] In the one-way valve 100 of the embodiments, the valve body 10 is provided with the protrusion 11, and the cross section of the protrusion 11 gradually decreases in the direction from the bottom wall 1011 to the valve disc 30. Thus, compared with the case where the cross section of the protrusion 11 remains unchanged in the direction from the bottom wall 1011 to the valve disc 30, the sealing surface area S between the valve disc 30 and the protrusion 11 is smaller, that is, the sealing between the valve disc 30 and the protrusion 11 can be changed from surface sealing to linear sealing or from surface sealing to approximately linear sealing. Thus, the oil adhesion between the valve body 10 and the valve disc 30 can be reduced, the opening response speed of the one-way valve 100 can be improved, that is, the speed at which the one-way valve 100 opens the through hole 103 to connect the through hole 103 with the flow passage 101 can be improved, and the gap collision between the piston and the oil of the shock absorber 210 caused by the oil compensation not being in time can be prevented, so that the abnormal fluctuation of the piston rod acceleration of the shock absorber 210 can be avoided, the vibration noise can be reduced or even eliminated, and the user experience can be improved.

[0076] The one-way valve 100 will be further described below with reference to the accompanying drawings.

[0077] Please refer to Figure 3 and Figure 4 In some embodiments, in the radial direction Y of the valve body 10, the first sealing surface includes opposite first and second edges, and the second sealing surface includes opposite third and fourth edges, the first sealing surface is closer to the center of the valve disc 30 than the second sealing surface, the first edge is closer to the center of the valve disc 30 than the second edge, and the third edge is closer to the center of the valve disc 30 than the fourth edge.

[0078] Specifically, in some embodiments, when the valve disc 30 is annular, the first and second sealing surfaces are both annular, in which case, the first, second, third and fourth edges form a circular shape, and the radius of the circle formed by the first edge is smaller than the radius of the circle formed by the second edge, and the radius of the circle formed by the third edge is smaller than the radius of the circle formed by the fourth edge.

[0079] Further, in some embodiments,

[0080] S1 = π(r2 2 -r1 2 );

[0081] S2 = π(r4 2 -r3 2 );

[0082] wherein, r1 is the distance between the first edge and the center of the valve disc 30 in the radial direction Y (i.e. the radius of the circle formed by the first edge); r2 is the distance between the second edge and the center of the valve disc 30 in the radial direction Y (i.e. the radius of the circle formed by the second edge); r3 is the distance between the third edge and the center of the valve disc 30 in the radial direction Y (i.e. the radius of the circle formed by the third edge); and r4 is the distance between the fourth edge and the center of the valve disc 30 in the radial direction Y (i.e. the radius of the circle formed by the fourth edge).

[0083] Specifically, as known from the above, the shapes formed by the first edge, the second edge, the third edge and the fourth edge are all circles, and thus the area S1 of the first sealing surface can be the difference between the area of the circle formed by the second edge and the area of the circle formed by the first edge, and the area S2 of the second sealing surface can be the difference between the area of the circle formed by the fourth edge and the area of the circle formed by the third edge.

[0084] In some embodiments,

[0085]

[0086] wherein, r1 is the distance between the first edge and the center of the valve disc 30 in the radial direction Y; r2 is the distance between the second edge and the center of the valve disc 30 in the radial direction Y; r3 is the distance between the third edge and the center of the valve disc 30 in the radial direction Y; and r4 is the distance between the fourth edge and the center of the valve disc 30 in the radial direction Y.

[0087] It should be noted that, in the case where the relationship between (r2-r1) and (r4-r3) satisfies the above formula, the contact area S between the valve disc 30 and the valve body 10 satisfies 2mm 2 ≤S≤30mm 2 Thus, on the one hand, it can avoid the contact area between the valve disc 30 and the valve body 10 being too small to cause the contact stress between the valve disc 30 and the valve body 10 being too large, reduce the possibility of the valve disc 30 or the valve body 10 being damaged by contact, and prolong the service life of the check valve 100; on the other hand, it can reduce the oil adhesion between the valve body 10 and the valve disc 30, improve the opening response speed of the check valve 100, prevent the gap collision phenomenon between the piston of the shock absorber 210 and the oil from occurring due to the oil compensation not being timely, avoid the abnormal fluctuation of the piston rod acceleration of the shock absorber 210, and reduce or even eliminate the vibration noise.

[0088] Please refer to Figure 3 In some embodiments, the check valve 100 further comprises an elastic member 50, at least a part of the elastic member 50 is arranged in the flow passage 101, and the elastic member 50 is configured to provide an elastic force to the valve disc 30 in the direction from the valve disc 30 to the protruding part 11.

[0089] Specifically, in some embodiments, when the force generated by the fluid in the through hole 103 and the fluid in the flow cavity 101 together on the valve sheet 30 is greater than the elastic force exerted by the elastic member 50 on the valve sheet 30, the valve sheet 30 can move relative to the valve body 10 away from the bottom wall 1011 of the flow cavity 101 to open the through hole 103, i.e., the valve sheet 30 can move in the flow cavity 101 relative to the valve body 10 away from the protruding part 11 to be spaced from the protruding part 11 under the action of the elastic force, in which case the fluid can flow into the flow cavity 101 through the through hole 103; when the force generated by the fluid in the through hole 103 and the fluid in the flow cavity 101 together on the valve sheet 30 is less than the elastic force exerted by the elastic member 50 on the valve sheet 30, the valve sheet 30 can move relative to the valve body 10 towards the bottom wall 1011 of the flow cavity 101 to close the through hole 103 under the action of the elastic force, i.e., the valve sheet 30 can move in the flow cavity 101 relative to the valve body 10 towards the protruding part 11 to be in contact with the protruding part 11 under the action of the elastic force, in which case the fluid cannot flow into the flow cavity 101 through the through hole 103. It should be noted that, in some embodiments, the elastic member 50 includes but is not limited to a compression spring, a tension spring, a flat spring, or a torsion spring, etc.

[0090] More specifically, please refer to Figure 4 In some embodiments, the valve sheet 30 includes a first side 31 and a second side 33 opposite to each other, and the first side 31 of the valve sheet 30 is opposite to the through hole 103;

[0091] When the force on the valve sheet 30 satisfies the following formula, the valve sheet 30 opens the through hole 103:

[0092] [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 )]-F1≥0;

[0093] When the force on the valve sheet 30 satisfies the following formula, the valve sheet 30 closes the through hole 103:

[0094] [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 )]-F1≤0;

[0095] P1*r1 + P2*r2 = P1*r3 + P1*r4 + F1

[0096] In some embodiments, the elastic force is greater than or equal to 5N and less than or equal to 10N. That is, 5N≤F1≤10N. Specifically, in some embodiments, the value of F1may be any one of 5N, 6N, 7N, 8N, 9N and 10N or any numerical value between any two of them.

[0097] If F1is less than 5N, the elastic force generated by the elastic member 50 on the valve disc 30 is too small, and the fluid in the flow cavity 101 can flow out of the one-way valve 100 through the through hole 103 in the opposite direction, affecting the stability and reliability of the one-way valve 100. If F1is greater than 10N, the elastic force generated by the elastic member 50 on the valve disc 30 is too large, and it is difficult for the fluid to flow into the flow cavity 101 through the through hole 103, and the oil compensation is not timely, which will cause the piston of the shock absorber 210 to collide with the oil, and then cause the piston rod acceleration of the shock absorber 210 to abnormally fluctuate, the structure vibration noise is large, which affects the user experience. In some embodiments of the present application, 5N≤F1≤10N, thereby on the one hand, it can avoid the elastic force of the elastic member 50 being too small to cause the fluid in the flow cavity 101 to flow out of the one-way valve 100 through the through hole 103 in the opposite direction, thereby improving the stability and reliability of the one-way valve 100; on the other hand, it can avoid the elastic force of the elastic member 50 being too large to cause the fluid to be difficult to flow into the flow cavity 101 through the through hole 103, prevent the oil compensation from being not timely to cause the piston of the shock absorber 210 to collide with the oil, thereby avoiding the piston rod acceleration of the shock absorber 210 to abnormally fluctuate, reducing or even eliminating the vibration noise, and improving the user experience.

[0098] It can be understood that at the moment when the one-way valve 100 is opened (i.e., the moment when the valve disc 30 moves relative to the valve body 10 in the direction away from the protruding portion 11), a narrow gap is formed between the valve disc 30 and the protruding portion 11. At this time, the fluid on the side of the narrow gap can flow into the inside of the narrow gap, and the fluid has a certain speed. According to Bernoulli's principle:

[0099]

[0100] Wherein, v is the flow velocity of the fluid; g is the acceleration of gravity; P is the pressure of the fluid in the narrow gap; p is the density of the fluid. It can be known from the above formula that, in the case of increasing the flow velocity of the fluid, the pressure of the fluid in the narrow gap decreases; if the size of the narrow gap is too large, the pressure of the fluid in the narrow gap will be reduced to P3, and P2>P3, so the valve plate 30 will also be subjected to additional adhesion force:

[0101] (P2-P3)*π(r2 2 -r1 2 )+(P2-P3)*π(r4 2 -r3 2 );

[0102] It can be known from the above that, the larger the area of the first sealing surface and the second sealing surface, the greater the additional adhesion force that the valve plate 30 is subjected to. In the embodiments of the present application, the valve plate 30 and the convex portion 11 are linearly sealed or approximately linearly sealed, compared with the case that the valve plate 30 and the convex portion 11 are face-type sealed, the size of the first sealing surface and the second sealing surface is smaller, so as to reduce the additional adhesion force that the valve plate 30 is subjected to, and improve the opening response speed of the one-way valve 100, that is, improve the speed of the one-way valve 100 to open the through hole 103 to make the through hole 103 communicate with the flow passage 101, prevent the gap collision phenomenon between the piston of the shock absorber 210 and the oil from occurring due to the oil compensation not being in time, and further avoid the abnormal fluctuation of the piston rod acceleration of the shock absorber 210, reduce or even eliminate the vibration noise, and improve the user experience.

[0103] Please refer to Figure 3 and Figure 4 In some embodiments, the convex portion 11 comprises a matching surface 111 and a peripheral side surface 113, the matching surface 111 is used to cooperate with the valve plate 30, the peripheral side surface 113 connects the matching surface 111 and the bottom wall 1011 of the flow passage 101, and the peripheral side surface 113 is a curved surface structure or an inclined surface structure; wherein, h>x, h is the distance between the valve plate 30 and the valve body 10 when the valve plate 30 cooperates with the matching surface 111; x is the distance between the connection between the peripheral side surface 113 and the bottom wall 1011 of the flow passage 101 and the center of the matching surface 111 in the radial direction Y of the valve body 10.

[0104] Specifically, in some embodiments, the matching surface 111 is used to cooperate with the first side 31 of the valve plate 30, and is configured to participate in forming the first sealing surface or the second sealing surface. Wherein, the peripheral side surface 113 is a curved surface structure or an inclined surface structure, and h>x, so as to increase the opening degree between the valve body 10 and the valve plate 30 at the sealing outlet, thereby reducing the flow velocity of the fluid flowing into the flow passage 101, preventing the fluid flow from being unstable due to the excessive flow velocity of the fluid, and further avoiding the problems of structural vibration and unstable flow, and improving the stability and reliability of the one-way valve 100.

[0105] See also Figure 3 and Figure 5 In some embodiments, the valve body 10 is further provided with a through hole 105 , which is connected to the circulation chamber 101 , and the through hole 105 is used to allow the fluid in the circulation chamber 101 to flow out.

[0106] Specifically, in some embodiments, the through hole 105 can also be connected to the recovery chamber or the compression chamber. In this way, when the fluid flows into the connecting chamber through the through hole 103, the fluid can flow out of the circulation chamber 101 to the recovery chamber or the compression chamber through the through hole 105, thereby realizing the fluid circulation or compensation function.

[0107] It should be noted that Figure 6 The figure is a schematic diagram of the damping force curve of the shock absorber under triangular wave displacement excitation, where the amplitude is ±24mm and the frequency is 2Hz. Specifically, Figure 6 The figure below shows the relationship between the displacement of the piston rod and time; Figure 6 The upper figure in the figure shows the relationship between the damping force of the shock absorber and time. Figure 7 It is a schematic diagram of the fluctuation of damping force under different sealing surface areas. Specifically, Figure 7 The sealing surface area S between the valve plate 30 and the protrusion 11 in Figure (a) is 35 mm 2 ; Figure 7 The sealing surface area S between the valve plate 30 and the protrusion 11 in Figure (b) is 30 mm 2 ; Figure 7 The sealing surface area S between the valve plate 30 and the protrusion 11 in Figure (a) is 25 mm 2 .

[0108] Please combine Figure 6 and Figure 7 In Figure (a), the sealing surface area S between the valve plate 30 and the protrusion 11 is 35mm 2 (ie S1 is 35mm 2 ; or, S2 is 35mm 2 ), the damping force of the shock absorber fluctuates, which will cause the piston rod to form a large vibration acceleration, thereby generating vibration noise; please combine Figure 6 ,as well as Figure 7 Figure (b) and Figure 7 In Figure (c), the sealing surface area S between the valve plate 30 and the protrusion 11 is less than or equal to 30mm 2 (ie S1 is less than or equal to 30mm 2 ; or, S2 is less than or equal to 30mm 2In this way, the damping force of the shock absorber fluctuates less, so that the piston rod can avoid forming a larger vibration acceleration, and thus the vibration noise can be reduced or even eliminated, and the user experience can be improved. In addition, in order to prevent the contact between the valve body 10 and the valve plate 30 from being damaged due to the contact stress caused by the small sealing surface area between the valve plate 30 and the convex portion 11, the sealing surface area S between the valve plate 30 and the convex portion 11 should be greater than or equal to 2mm 2 (i.e., S1 is greater than or equal to 2mm 2 , and S2 is greater than or equal to 2mm 2 ).

[0109] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure. Meanwhile, other embodiments can be derived from the above-described embodiments, so that structural and logical substitutions and changes can be made without departing from the scope of the present disclosure.

[0110] The above-described embodiments only express several embodiments of the present application, and the description is specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A one-way valve (100), characterized in that: include: A valve body (10), the valve body (10) being provided with a circulation cavity (101) and a through hole (103), the valve body (10) being further provided with a protrusion (11), the protrusion (11) protruding and extending from a bottom wall (1011) of the circulation cavity (101) into the circulation cavity (101); and A valve plate (30) is movably arranged in the circulation cavity (101), and the cross-section of the protrusion (11) gradually decreases along the direction from the bottom wall (1011) to the valve plate (30). The valve plate (30) is used to cooperate with the protrusion (11) to selectively open or close the communication between the through hole (103) and the circulation cavity (101).

2. The one-way valve (100) according to claim 1, characterized in that The valve plate (30) is configured to be able to contact with one of the protrusions (11) and form a sealing surface, wherein S≤30mm 2 , S is the area of ​​the sealing surface.

3. The one-way valve (100) according to claim 2, characterized in that S≥2mm 2 。 4. The one-way valve (100) according to any one of claims 1 to 3, characterized in that: The protrusions (11) include two, the two protrusions (11) are spaced apart and distributed along the radial direction of the valve body (10), and the through hole (103) is provided between the two protrusions (11).

5. The one-way valve (100) according to claim 4, characterized in that: The valve plate (30) is configured to be able to contact the two protrusions (11) and form a first sealing surface and a second sealing surface respectively; In the radial direction of the valve body (10), the first sealing surface includes a first side and a second side opposite to each other, the second sealing surface includes a third side and a fourth side opposite to each other, the first sealing surface is closer to the center of the valve plate (30) than the second sealing surface, the first side is closer to the center of the valve plate (30) than the second side, and the third side is closer to the center of the valve plate (30) than the fourth side.

6. The one-way valve (100) according to claim 5, characterized in that S1＝π(r2 2 -r1 2 )； S2＝π(r4 2 -r3 2 )； Wherein, r1 is the distance between the first side and the center of the valve plate (30) in the radial direction; r2 is the distance between the second side and the center of the valve plate (30) in the radial direction; r3 is the distance between the third side and the center of the valve plate (30) in the radial direction; and r4 is the distance between the fourth side and the center of the valve plate (30) in the radial direction.

7. The one-way valve (100) according to claim 5, characterized in that Wherein, r1 is the distance between the first side and the center of the valve plate (30) in the radial direction; r2 is the distance between the second side and the center of the valve plate (30) in the radial direction; r3 is the distance between the third side and the center of the valve plate (30) in the radial direction; and r4 is the distance between the fourth side and the center of the valve plate (30) in the radial direction.

8. The one-way valve (100) according to claim 5, characterized in that The one-way valve (100) further comprises: An elastic member (50), at least a portion of which is disposed in the circulation cavity (101), and the elastic member (50) is used to provide an elastic force to the valve plate (30) in a direction from the valve plate (30) to the protrusion (11).

9. The one-way valve (100) according to claim 8, characterized in that The valve plate (30) comprises a first side (31) and a second side (33) opposite to each other, and the first side (31) of the valve plate (30) is opposite to the through hole (103); When the force applied to the valve plate (30) satisfies the following formula, the valve plate (30) opens the through hole (103): [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 )]-F1≥0; When the force applied to the valve plate (30) satisfies the following formula, the valve plate (30) closes the through hole (103): [P1*π(r3 2 -r2 2 )-P2*π(r4 2 -r1 2 )]-F1≤0; Wherein, P1 is the pressure of the first side (31) of the valve plate (30); P2 is the pressure of the second side (33) of the valve plate (30); r1 is the distance between the first side and the center of the valve plate (30) in the radial direction; r2 is the distance between the second side and the center of the valve plate (30) in the radial direction; r3 is the distance between the third side and the center of the valve plate (30) in the radial direction; r4 is the distance between the fourth side and the center of the valve plate (30) in the radial direction; F1 is the elastic force.

10. The one-way valve (100) according to claim 8, characterized in that The elastic force is greater than or equal to 5N and less than or equal to 10N.

11. The one-way valve (100) according to claim 1, characterized in that The protrusion (11) includes a mating surface (111) and a peripheral side surface (113), wherein the mating surface (111) is used to mate with the valve disc (30), and the peripheral side surface (113) connects the mating surface (111) and the bottom wall (1011) of the circulation cavity (101), and the peripheral side surface (113) is a curved surface structure or an inclined surface structure; wherein, h≥x, h is the distance between the valve disc (30) and the valve body (10) when the valve disc (30) is mated with the mating surface (111); and x is the distance between the connection between the peripheral side surface (113) and the bottom wall (1011) of the circulation cavity (101) and the center of the mating surface (111) in the radial direction of the valve body (10).

12. The one-way valve (100) according to claim 1, characterized in that The valve body (10) is further provided with a through hole (105), the through hole (105) being in communication with the circulation cavity (101), and the through hole (105) is used for allowing the fluid in the circulation cavity (101) to flow out.

13. A vibration damper (210), characterized in that: include: The one-way valve (100) according to any one of claims 1 to 12.

14. A suspension system (500), characterized in that: include: The vibration absorber (210) as claimed in claim 13.

15. A vehicle (600), characterized in that include: The suspension system (500) of claim 14.

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