Overflow valve seat for shock absorber, flow regulating valve, shock absorber and vehicle

Abstract

The invention discloses an overflow valve seat for a shock absorber, a flow regulating valve, the shock absorber and a vehicle, the overflow valve seat comprises a valve seat abutting ring table, a valve seat abutting ring table, a valve seat abutting ring table and a valve seat abutting ring table, the valve seat abutting ring table is arranged on the side, facing an overflow valve body of the shock absorber, of the overflow valve seat; the valve seat flow guide face is arranged on the side, facing the overflow valve body, of the overflow valve seat, and the valve seat flow guide face is located on the radial outer side of the valve seat abutting ring table. According to the overflow valve seat, the flow resistance of fluid flowing through the flow regulating valve can be reduced, so that the flow of the fluid flowing through the flow regulating valve can be conveniently regulated, and the damping force of the shock absorber can be conveniently regulated.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Chinese patent application No. "202411402669.3" filed by BYD Co., Ltd. on September 30, 2024, entitled "Shock Absorber and Vehicle". Technical Field

[0002] The present invention relates to the technical field of vehicles, and in particular to an overflow valve seat for a shock absorber, a flow regulating valve, a shock absorber and a vehicle. Background Art

[0003] The flow regulating valve of the shock absorber in the related art is usually provided with an overflow valve seat. When the flow regulating valve is in the open state, the fluid can flow between the overflow valve seat and the overflow valve body, and the damping force of the shock absorber can be adjusted by controlling the flow of this part of the fluid. However, due to the unreasonable structural setting of the overflow valve seat in the related art, the flow resistance between the overflow valve seat and the overflow valve body is relatively large, which is not conducive to adjusting the flow of this part of the fluid, and thus is not conducive to adjusting the damping force of the shock absorber. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a relief valve seat for a shock absorber, which can reduce the flow resistance of a fluid flowing through a flow regulating valve, so as to adjust the flow rate of the fluid flowing through the flow regulating valve, thereby facilitating the adjustment of the damping force of the shock absorber.

[0005] The present invention also provides a flow regulating valve having the overflow valve seat.

[0006] The invention also provides a shock absorber having the flow regulating valve.

[0007] The present invention also provides a vehicle having the shock absorber.

[0008] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, an overflow valve seat for a shock absorber is proposed, comprising: a valve seat abutting ring, wherein the valve seat abutting ring is arranged on a side of the overflow valve seat facing the overflow valve body of the shock absorber; and a valve seat guide surface, wherein the valve seat guide surface is arranged on a side of the overflow valve seat facing the overflow valve body, and the valve seat guide surface is located radially outside the valve seat abutting ring.

[0009] In this way, the overflow valve seat according to the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve, so as to adjust the flow of the fluid flowing through the flow regulating valve, and further facilitate the adjustment of the damping force of the shock absorber.

[0010] According to some embodiments of the present invention, along the radial direction of the overflow valve seat, the distance between any point of the valve seat guide surface and the radial outer side of the valve seat abutting ring platform is X; along the axial direction of the overflow valve seat, the distance between any point of the valve seat guide surface and one end of the valve seat abutting ring platform facing the overflow valve body is Y; X and Y satisfy: Y / X>0.5.

[0011] According to some embodiments of the present invention, along the radial direction of the overflow valve seat, the radial thickness of the valve seat abutting against the ring platform is T, and T satisfies: T≤0.2 mm.

[0012] According to some embodiments of the present invention, along the radial direction of the overflow valve seat, the radial thickness of the valve seat abutting the annular platform is T, and T satisfies: T>0.15mm.

[0013] According to some embodiments of the present invention, the valve seat guide surface includes: a first step surface, the first step surface is connected to the radial outer side of the valve seat abutment ring and extends radially along the overflow valve seat, and the valve seat abutment ring exceeds the first step surface in a direction close to the overflow valve body; a second step surface, the second step surface is connected to the radial outer side of the first step surface and extends radially along the overflow valve seat, and the first step surface exceeds the second step surface in a direction close to the overflow valve body.

[0014] According to some embodiments of the present invention, the valve seat guide surface includes: a third step surface, the third step surface is connected to the radial outer side of the valve seat abutment ring and extends radially along the overflow valve seat, and the valve seat abutment ring exceeds the third step surface in a direction approaching the overflow valve body; and a slope, the slope is connected to the radial outer side of the third step surface and gradually moves away from the overflow valve body along the radial outward direction of the overflow valve seat.

[0015] According to some embodiments of the present invention, the valve seat guide surface includes an inclined surface, which is connected to the radial outer side of the valve seat abutting ring platform, and the inclined surface gradually moves away from the overflow valve body along the radial outward direction of the overflow valve seat; wherein, along the axial direction of the overflow valve seat approaching the overflow valve body, the valve seat abutting ring platform exceeds the end of the inclined surface adjacent to the overflow valve body.

[0016] According to some embodiments of the present invention, the valve seat guide surface includes a slope, which is connected to the radial outer side of the valve seat abutting ring platform, and gradually moves away from the overflow valve body along the radial outward direction of the overflow valve seat; wherein, along the axial direction of the overflow valve seat, one end of the slope adjacent to the overflow valve body is flush with one end of the valve seat abutting ring platform facing the overflow valve body.

[0017] According to some embodiments of the present invention, along the axial direction of the overflow valve seat approaching the overflow valve body, the dimension of the valve seat abutting ring platform beyond the valve seat guide surface adjacent to the overflow valve body is B, and B satisfies: 0.4mm≤B≤0.6mm.

[0018] According to some embodiments of the present invention, an angle between the inclined surface and a radial direction of the overflow valve seat is β, and β satisfies: 35°≤β≤55°.

[0019] According to a second aspect of the present invention, a flow regulating valve for a shock absorber is proposed, and the flow regulating valve comprises: the overflow valve seat according to the first aspect of the present invention; an overflow valve body, which is movably arranged on one side of the overflow valve seat; and an overflow valve plate, which is movably arranged between the overflow valve body and the overflow valve seat, and the overflow valve plate abuts against the valve seat abutment ring.

[0020] The flow regulating valve described in the second aspect embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve by utilizing the overflow valve seat described in the first aspect embodiment of the present invention, so as to facilitate the adjustment of the fluid flow through the flow regulating valve, and further facilitate the adjustment of the damping force of the shock absorber.

[0021] According to some embodiments of the present invention, along the radial outward direction of the overflow valve seat, the outer circumferential surface of the overflow valve plate exceeds the outer circumferential surface of the valve seat abutting the ring platform by a distance A, and A satisfies 0.15mm≤A≤0.5mm.

[0022] According to some embodiments of the present invention, the overflow valve seat is provided with a first flow channel, which is suitable for being connected to the compression chamber of the shock absorber; a second flow channel is formed between the overflow valve plate and the overflow valve body, and a third flow channel is formed between the overflow valve plate and the overflow valve seat, and the second flow channel and the third flow channel are respectively connected to the first flow channel and are both connected to the recovery chamber of the shock absorber; wherein, the second flow channel and / or the third flow channel are opened and closed by the movement of the overflow valve body.

[0023] According to some embodiments of the present invention, the overflow valve plate is configured with at least one communicating hole, and the second flow channel is connected to the first flow channel through the communicating hole.

[0024] According to a third aspect of the present invention, a shock absorber is proposed, comprising: a cylinder; a piston, the piston is movably arranged in the cylinder, and the piston separates a compression chamber and a recovery chamber in the cylinder; a flow regulating valve according to the second aspect of the present invention, the flow regulating valve is arranged in the piston and is respectively connected to the compression chamber and the recovery chamber; a control valve, the control valve is arranged in the piston, and the control valve adjusts the fluid flow between the compression chamber and the recovery chamber by controlling the flow regulating valve.

[0025] The shock absorber described in the third aspect embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve by utilizing the flow regulating valve described in the second aspect embodiment of the present invention, so as to facilitate the adjustment of the fluid flow through the flow regulating valve, and further facilitate the adjustment of the damping force of the shock absorber.

[0026] According to a fourth aspect of the present invention, a vehicle is provided. The vehicle comprises the shock absorber according to the third aspect of the present invention.

[0027] The vehicle described in the fourth aspect of the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve by utilizing the shock absorber described in the third aspect of the embodiment of the present invention, so as to facilitate the adjustment of the fluid flow through the flow regulating valve, and further facilitate the adjustment of the damping force of the shock absorber.

[0028] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a schematic structural diagram of a shock absorber according to an embodiment of the present invention; Figure 2 is a structural schematic diagram of a flow control valve according to an embodiment of the present invention, when the initial position is in an open valve state and the working condition is restored; Figure 3 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in an open valve state at an initial position; Figure 4 It is a structural schematic diagram of the flow control valve according to an embodiment of the present invention, when the initial position is in a closed valve state and the working condition is restored; Figure 5 is a structural schematic diagram of a compression condition when the flow control valve according to an embodiment of the present invention is in a closed valve state at an initial position; Figure 6is a cross-sectional view of a flow control valve according to an embodiment of the present invention; Figure 7 yes Figure 6 Detailed view of C; Figure 8 is a cross-sectional view of the flow control valve according to an embodiment of the present invention when the second flow channel is opened; Fig. 9 yes Figure 8 Detailed view of D; Fig.10 is a cross-sectional view of the flow control valve according to an embodiment of the present invention when the third flow channel is opened; Fig.11 is a partial structural schematic diagram of a relief valve seat according to an embodiment of the present invention; Fig.12 is a cross-sectional view of a relief valve seat according to a first embodiment of the present invention; Fig.13 is a cross-sectional view of a relief valve seat according to a second embodiment of the present invention; Fig.14 is a cross-sectional view of a relief valve seat according to a third embodiment of the present invention; Fig.15 is a sectional view of a relief valve seat according to a fourth embodiment of the present invention.

[0030] Reference numerals 1. Shock absorber; 100, cylinder; 110, inner cylinder; 111, compression chamber; 112, recovery chamber; 120, outer cylinder; 121, liquid storage chamber; 130, bottom valve assembly; 200, piston; 300, flow control valve; 310, overflow valve body; 311, second flow channel; 320, overflow valve seat; 321, first flow channel; 322, third flow channel; 325, valve seat abutting ring platform; 326, valve seat guide surface; 3261, inclined surface; 3262, third step surface; 328, first step surface; 329, second step surface; 330, overflow valve plate; 331, communicating hole; 400. Control valve. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0033] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0034] In the description of the present invention, "plurality" means two or more than two, and "several" means one or more.

[0035] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0036] like Figure 1-Figure 5 As shown, the shock absorber 1 according to the embodiment of the present invention includes a cylinder 100 , a piston 200 , a flow regulating valve 300 and a control valve 400 .

[0037] The piston 200 is movably disposed on the cylinder 100, and the piston 200 separates a compression chamber 111 and a recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is disposed in the piston 200 and is respectively connected to the compression chamber 111 and the recovery chamber 112. The control valve 400 is disposed on the piston 200. The control valve 400 adjusts the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300.

[0038] The compression chamber 111 and the recovery chamber 112 may store fluid, such as fluid with a certain pressure and inert gas.

[0039] Among them, the shock absorber 1 also includes a bottom valve assembly 130, the cylinder 100 includes an outer cylinder 120 and an inner cylinder 110, the inner cylinder 110 extends into the outer cylinder 120, and a liquid storage chamber 121 is formed between the outer cylinder 120 and the inner cylinder 110. The piston 200 is movably arranged in the inner cylinder 110 and separates a compression chamber 111 and a recovery chamber 112 in the inner cylinder 110. The bottom valve assembly 130 is installed on the inner cylinder 110 or the outer cylinder 120, and the fluid in the compression chamber 111 flows into the liquid storage chamber 121 through the bottom valve assembly 130, or the fluid in the liquid storage chamber 121 flows into the compression chamber 111 through the bottom valve assembly 130.

[0040] In the present invention, the flow control valve 300 is in an open valve state at the initial position, which means that the flow control valve 300 is in an open initial state when there is no external pressure squeezing the flow control valve 300 and no fluid flows in the flow control valve 300. Also, the flow control valve 300 is in a closed valve state at the initial position, which means that the flow control valve 300 is squeezed by an external force, and the overflow valve seat 320 and the overflow valve body 310 of the flow control valve 300 are in abutment and closed initial state.

[0041] For example, in some embodiments, when the valve core assembly 500 is energized, it squeezes the flow regulating valve 300. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is not energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in abutment and closed initial state.

[0042] Alternatively, in other embodiments, the flow regulating valve 300 will be squeezed when the valve core assembly 500 is not energized. At this time, the flow regulating valve 300 is in an open valve state at the initial position, which means that the valve core assembly 500 is energized and there is no fluid flowing in the flow regulating valve 300, and the flow regulating valve 300 is in an open initial state. At this time, the flow regulating valve 300 is in a balanced state; and, the flow regulating valve 300 is in a closed valve state at the initial position, which means that the valve core assembly 500 is not energized and the overflow valve seat 320 and the overflow valve body 310 of the flow regulating valve 300 are in an abutment and closed initial state.

[0043] According to the shock absorber 1 of the embodiment of the present invention, the piston 200 is movably arranged on the cylinder 100, and the piston 200 separates the compression chamber 111 and the recovery chamber 112 in the cylinder 100. The flow regulating valve 300 is arranged on the piston 200 and is connected to the compression chamber 111 and the recovery chamber 112 respectively.

[0044] In this way, when the shock absorber 1 is in a compression condition, the piston 200 compresses the volume of the compression chamber 111, and the volume of the recovery chamber 112 will increase accordingly. At this time, the fluid in the compression chamber 111 will flow to the recovery chamber 112 through the flow regulating valve 300, and when the shock absorber 1 is in a recovery condition, the piston 200 compresses the volume of the recovery chamber 112, and the volume of the compression chamber 111 will increase accordingly. At this time, the fluid in the recovery chamber 112 will flow to the compression chamber 111 through the flow regulating valve 300. In the above process, by repeatedly changing the moving direction of the piston 200, the fluid repeatedly flows between the compression chamber 111 and the recovery chamber 112, and the friction between the fluid and the shock absorber 1 generates heat, which can convert the kinetic energy of the piston 200 into the thermal energy of the fluid, thereby reducing the power of the piston 200.

[0045] Therefore, when the cylinder 100 and the piston 200 of the shock absorber 1 are respectively connected to two objects (such as a vehicle frame and a wheel), when one of the two objects vibrates, the vibration force transmitted to the other object can be reduced by the presence of the shock absorber 1, thereby achieving a vibration reduction effect.

[0046] In addition, the control valve 400 is disposed on the piston 200 , and the control valve 400 adjusts the fluid flow between the compression chamber 111 and the recovery chamber 112 by controlling the flow regulating valve 300 .

[0047] In this way, when the piston 200 moves, the control valve 400 can be used to adjust the fluid flow rate flowing back and forth between the compression chamber 111 and the recovery chamber 112 at the same time. When the fluid flow rate flowing through the flow regulating valve 300 is large, the damping force of the shock absorber 1 can be small, that is, the shock absorber 1 can appear "soft", and when the fluid flow rate flowing through the flow regulating valve 300 is small, the damping force of the shock absorber 1 can be large, that is, the shock absorber 1 can appear "hard", and the control valve 400 can continuously adjust the size of the fluid flow rate flowing through the flow regulating valve 300, so that the shock absorber 1 can achieve continuous adjustment of the damping force, which is beneficial to improving the ride comfort and handling stability of the vehicle.

[0048] Moreover, by controlling the flow regulating valve 300 through the control valve 400, the fluid flow structure between the compression chamber 111 and the recovery chamber 112 of the shock absorber 1 is simple, thereby simplifying the adjustment structure of the damping force of the shock absorber 1, so as to facilitate the adjustment of the damping force of the shock absorber 1, and the adjustment is simpler and more convenient.

[0049] In this way, the shock absorber 1 according to the embodiment of the present invention can continuously adjust the damping force by adjusting the fluid flow between the compression chamber 111 and the restoring chamber 112, which is beneficial to improving the riding comfort and the handling performance of the vehicle. In addition, the shock absorber 1 has a simple structure and is easy to adjust.

[0050] The overflow valve seat 320 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0051] like Figure 1-Figure 15 As shown, the overflow valve seat 320 according to the embodiment of the present invention comprises a valve seat abutting ring platform 325 and a valve seat guide surface 326. The valve seat abutting ring platform 325 in the present invention is the first abutting ring platform in the priority application, and the valve seat guide surface 326 in the present invention is the guide surface in the priority application.

[0052] The valve seat abutting ring 325 is arranged on the side of the overflow valve seat 320 facing the overflow valve body 310 of the shock absorber 1 , and the valve seat guide surface 326 is arranged on the side of the overflow valve seat 320 facing the overflow valve body 310 , and the valve seat guide surface 326 is located radially outside the valve seat abutting ring 325 .

[0053] In this way, the overflow valve seat 320 can be abutted against the overflow valve body 310 through the valve seat abutment ring 325, and the valve seat guide surface 326 can be separated from the overflow valve body 310. By arranging the valve seat guide surface 326 on the outer side of the valve seat abutment ring 325, the valve seat guide surface 326 can be used to reduce the flow resistance of the fluid flowing through the overflow valve seat 320 and the overflow valve body 310. In this way, when the flow control valve 300 is in the valve opening state, the fluid flowing through the overflow valve seat 320 and the overflow valve body 310 can be guided by the valve seat guide surface 326, so as to adjust the fluid flow through the overflow valve seat 320 and the overflow valve body 310, thereby facilitating the adjustment of the damping force of the shock absorber 1.

[0054] Thus, the overflow valve seat 320 according to the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve 300 , so as to adjust the fluid flow through the flow regulating valve 300 , and further adjust the damping force of the shock absorber 1 .

[0055] In some specific embodiments of the present invention, Figure 7 As shown, along the radial direction of the overflow valve seat 320, the distance between any point of the valve seat guide surface 326 and the radial outer side of the valve seat abutting ring platform 325 is X; Along the axial direction of the relief valve seat 320 , the distance between any point of the valve seat guide surface 326 and one end of the valve seat abutting ring 325 facing the relief valve body 310 is Y, and X and Y satisfy: Y / X>0.5.

[0056] The X value of the selected point can be 0.5 mm, 1 mm or 1.5 mm. In addition, it should be noted that the units of X and Y are the same, both in millimeters.

[0057] This arrangement can avoid the interval between the valve seat guide surface 326 and the overflow valve body 310 being too small, so that the fluid can flow into between the valve seat guide surface 326 and the overflow valve body 310, that is, it is easy to guide the fluid through the valve seat guide surface 326, thereby reducing the flow resistance of the fluid and making the fluid flow more smooth.

[0058] In some specific embodiments of the present invention, Figure 7 As shown, along the radial direction of the overflow valve seat 320, the radial thickness of the valve seat abutting the ring platform 325 is T, and T satisfies: T≤0.2mm.

[0059] Furthermore, if Figure 7 As shown, along the radial direction of the overflow valve seat 320, the radial thickness of the valve seat abutting the ring platform 325 is T, and T satisfies: T>0.15mm. For example, the radial thickness T of the valve seat abutting the ring platform 325 can be 0.16mm, 0.17mm, 0.18mm, 0.19mm or 0.2mm.

[0060] It should be noted that the thickness T of the valve seat abutment ring 325, as well as X and Y, will affect the flow area of ​​the fluid between the valve seat abutment ring 325 and the relief valve body 310, that is, it will affect the flow area of ​​the fluid at the third flow channel 322. It can be seen from the Bernoulli principle that under the same streamline, the greater the flow rate, the smaller the pressure, which makes it difficult for the relief valve body 310 to open under the action of fluid force, and is prone to "adsorption", affecting the consistency of the damping force with the design value. Therefore, the smaller the thickness T of the valve seat abutment ring 325, the better. To ensure strength and durability, the thickness T of the valve seat abutment ring 325 must be at least 10 / material yield strength. For steel, it is more appropriate for the thickness T of the valve seat abutment ring 325 to be above 0.15 mm. If T is too small, the machining tolerance of the parts must be precise, and the manufacturing cost of the parts must be high.

[0061] Therefore, by limiting T≤0.2 mm, it is possible to avoid the radial thickness of the valve seat abutting the ring platform 325 being too large, thereby avoiding the adsorption force of the overflow valve seat 320 and the overflow valve body 310 being too large, so as to facilitate opening of the flow control valve 300.

[0062] By limiting T>0.15 mm, the radial thickness of the valve seat abutting ring platform 325 can be prevented from being too small, so as to ensure that the structural strength of the valve seat abutting ring platform 325 is high and avoid damage to the overflow valve seat 320.

[0063] In some specific embodiments of the present invention, Fig.12 As shown, the valve seat guide surface 326 includes a first step surface 328 and a second step surface 329. The first step surface 328 in the present invention is the reinforced step in the priority application.

[0064] The first step surface 328 is connected to the radial outer side of the valve seat abutting ring platform 325 and extends radially along the overflow valve seat 320, and the valve seat abutting ring platform 325 exceeds the first step surface 328 in the direction approaching the overflow valve body 310, and the second step surface 329 is connected to the radial outer side of the first step surface 328 and extends radially along the overflow valve seat 320, and the first step surface 328 exceeds the second step surface 329 in the direction approaching the overflow valve body 310.

[0065] With such an arrangement, the first step surface 328 can be used to improve the structural strength of the valve seat abutting ring platform 325, the valve seat abutting ring platform 325 is not easy to be deformed and damaged, and the contact area between the valve seat abutting ring platform 325 and the overflow valve body 310 can be small, so as to facilitate opening of the flow control valve 300, or the contact area between the valve seat abutting ring platform 325 and the overflow valve plate 330 can be small, so as to avoid excessive pressure difference between the upper and lower parts of the overflow valve plate 330, so as to facilitate opening of the flow control valve 300.

[0066] In other specific embodiments of the present invention, Fig.13 As shown, the valve seat guide surface 326 includes a third step surface 3262 and an inclined surface 3261 .

[0067] The third step surface 3262 is connected to the radial outer side of the valve seat abutting ring platform 325 and extends radially along the overflow valve seat 320, and the valve seat abutting ring platform 325 exceeds the third step surface 3262 in the direction approaching the overflow valve body 310, and the inclined surface 3261 is connected to the radial outer side of the third step surface 3262, and gradually moves away from the overflow valve body 310 along the radial outward of the overflow valve seat 320.

[0068] In this way, along the radial outward direction of the overflow valve seat 320, the distance between the inclined surface 3261 and the overflow valve body 310 can gradually increase, further reducing the fluid flow resistance between the inclined surface 3261 and the overflow valve body 310, making the fluid flow smoother and the valve seat guide surface 326 having a better fluid guidance effect.

[0069] In other specific embodiments of the present invention, Fig.14 As shown, the valve seat guide surface 326 includes an inclined surface 3261 , which is connected to the radial outer side of the valve seat abutting ring 325 , and gradually moves away from the relief valve body 310 along the radial outward direction of the relief valve seat 320 .

[0070] In which, along the axial direction of the relief valve seat 320 approaching the relief valve body 310 , the valve seat abuts against the end of the ring platform 325 that exceeds the inclined surface 3261 and is adjacent to the relief valve body 310 .

[0071] With this arrangement, not only can the fluid be guided by the inclined surface 3261 to reduce the flow resistance of the fluid, but the end of the inclined surface 3261 adjacent to the overflow valve body 310 can be spaced apart from the overflow valve body 310, thereby ensuring that the distance between the inclined surface 3261 and the overflow valve body 310 can be set larger, further reducing the flow resistance of the fluid flowing through the inclined surface 3261 and the overflow valve body 310, and the fluid flows more smoothly.

[0072] In other specific embodiments of the present invention, Fig.15 As shown, the valve seat guide surface 326 includes an inclined surface 3261 , which is connected to the radial outer side of the valve seat abutting ring 325 , and gradually moves away from the relief valve body 310 along the radial outward direction of the relief valve seat 320 .

[0073] In which, along the axial direction of the relief valve seat 320 , one end of the inclined surface 3261 adjacent to the relief valve body 310 is flush with one end of the valve seat abutting ring 325 facing the relief valve body 310 .

[0074] Such an arrangement can not only guide the fluid through the inclined surface 3261 to reduce the flow resistance of the fluid, but also simplify the structure of the inclined surface 3261 and the valve seat abutting ring platform 325, that is, the structure of the valve seat guide surface 326 and the valve seat abutting ring platform 325 can be simplified, and the structure of the overflow valve seat 320 can be simpler and easier to process.

[0075] In some specific embodiments of the present invention, Figure 12-14 As shown, along the axial direction of the relief valve seat 320 toward the relief valve body 310, the dimension of the valve seat abutting ring 325 beyond the valve seat guide surface 326 adjacent to the relief valve body 310 is B, and B satisfies: 0.4mm≤B≤0.6mm. For example, B can be 0.4mm, 0.45mm, 0.5mm, 0.55mm or 0.6mm.

[0076] Such arrangement can, on the one hand, prevent the dimension B of the valve seat abutting ring platform 325 beyond the valve seat guide surface 326 adjacent to the overflow valve body 310 from being too small, that is, prevent the gap between the valve seat guide surface 326 and the overflow valve body 310 from being too small, so as to ensure that the flow resistance of the fluid flowing through the valve seat guide surface 326 and the overflow valve body 310 can be small. On the other hand, it can prevent the dimension B of the valve seat abutting ring platform 325 beyond the valve seat guide surface 326 adjacent to the overflow valve body 310 from being too large, that is, prevent the length of the valve seat abutting ring body 325 from being too long, so that the structural strength of the valve seat abutting ring platform 325 can be higher, and the valve seat abutting ring platform 325 is not easily deformed and damaged.

[0077] In some specific embodiments of the present invention, Figure 13-Figure 15 As shown, the angle between the inclined surface 3261 and the radial direction of the overflow valve seat 320 is β, and β satisfies: 35°≤β≤55°. In this way, the structural strength of the overflow valve seat 320 can be higher, and the inclined surface 3261 has a better guiding effect on the fluid, the fluid flow resistance can be smaller, the flow is smoother, and it is convenient for the fluid to flow along the guiding surface 326 and push the flow control valve 300 to open.

[0078] The flow control valve 300 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0079] like Figure 1-Figure 10 As shown, the flow control valve 300 includes a relief valve seat 320 , a relief valve body 310 and a relief valve plate 330 according to the above-mentioned embodiment of the present invention.

[0080] The overflow valve body 310 is movably disposed on one side of the overflow valve seat 320 , the overflow valve plate 330 is movably disposed between the overflow valve body 310 and the overflow valve seat 320 , and the overflow valve plate 330 abuts against the valve seat abutting ring 325 .

[0081] When the overflow valve body 310 and the overflow valve seat 320 are respectively in contact with the overflow valve plate 330, the flow regulating valve 300 is closed; and when at least one of the overflow valve body 310 and the overflow valve seat 320 is separated from the overflow valve plate 330, the flow regulating valve 300 is opened.

[0082] Specifically, Figure 1 , Figure 6 , Figure 8 and Fig.10 As shown, the overflow valve seat 320 is constructed with a first flow channel 321, which is suitable for communicating with the compression chamber 111 of the shock absorber 1; and a second flow channel 311 is formed between the overflow valve plate 330 and the overflow valve body 310, and a third flow channel 322 is formed between the overflow valve plate 330 and the overflow valve seat 320, the second flow channel 311 and the third flow channel 322 are respectively communicated with the first flow channel 321 and are both communicated with the recovery chamber 112 of the shock absorber 1; wherein the second flow channel 311 and / or the third flow channel 322 are opened and closed by the movement of the overflow valve body 310.

[0083] Among them, when the second flow channel 311 is opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the second flow channel 311; when the third flow channel 322 is opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the third flow channel 322; when the second flow channel 311 and the third flow channel 322 are both opened, the fluid between the compression chamber 111 and the recovery chamber 112 can flow through the first flow channel 321 and the second flow channel 311, and can flow through the first flow channel 321 and the third flow channel 322.

[0084] By dividing the flow regulating valve 300 into the overflow valve body 310, the overflow valve plate 330 and the overflow valve seat 320, the control valve 400 can control the relative movement of the overflow valve body 310 relative to the overflow valve seat 320, so that the second flow channel 311 and the third flow channel 322 can be closed. At this time, the fluid in the recovery chamber 112 and the compression chamber 111 cannot flow through the first flow channel 321 and the second flow channel 311 or the third flow channel 322; or, the second flow channel 311 and / or the third flow channel 322 can be opened so that the fluid in the recovery chamber 112 and the compression chamber 111 can flow through the first flow channel 321 and the second flow channel 311 and / or the third flow channel 322, and by controlling the opening and closing size of the second flow channel 311 and / or the third flow channel 322, the flow rate of the fluid between the compression chamber 111 and the recovery chamber 112 can be changed to adjust the damping force of the shock absorber 1, and the pressure between the compression chamber 111 and the recovery chamber 112 can be balanced.

[0085] In addition, by adding a movable overflow valve plate 330 between the overflow valve body 310 and the overflow valve seat 320, when the flow regulating valve 300 is in the closed state at the initial position and the shock absorber 1 is in the recovery state, the overflow valve body 310 and the overflow valve seat 320 can first abut on the opposite sides of the overflow valve plate 330, and the fluid can push open the overflow valve body 310, and the overflow valve body 310 and the overflow valve plate 330 move relative to each other, and the second flow channel 311 is opened. At this time, the fluid in the recovery chamber 112 can pass through the second flow channel 311 and the first flow channel 321. Flows into the compression chamber 111; when the flow regulating valve 300 is in a closed state at the initial position and the shock absorber 1 is in a compression condition, the overflow valve body 310 and the overflow valve seat 320 can first abut against the opposite sides of the overflow valve plate 330, and the fluid can push open the overflow valve body 310 and the overflow valve plate 330, that is, the overflow valve plate 330 and the overflow valve body 310 move together relative to the overflow valve seat 320, and the third flow channel 322 opens. At this time, the fluid in the compression chamber 111 can flow into the recovery chamber 112 through the third flow channel 322 and the first flow channel 321.

[0086] With such an arrangement, when the shock absorber 1 is in a compression condition or a recovery condition, the overflow valve body 310 and the overflow valve seat 320 can be more easily moved relative to each other, that is, the overflow valve plate 330 can assist in opening the overflow valve body 310 and the overflow valve seat 320 to facilitate the connection between the compression chamber 111 and the recovery chamber 112.

[0087] The flow regulating valve 300 according to the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve 300 by utilizing the overflow valve seat 320 according to the above-mentioned embodiment of the present invention, so as to facilitate the adjustment of the fluid flow through the flow regulating valve 300, and further facilitate the adjustment of the damping force of the shock absorber 1.

[0088] In some specific embodiments of the present invention, Fig. 9 As shown, along the radial outward direction of the overflow valve seat 320, the distance that the outer circumference of the overflow valve plate 330 exceeds the outer circumference of the valve seat abutting the ring platform 325 is A, and A satisfies 0.15mm≤A≤0.5mm.

[0089] For example, the distance A that the outer circumference of the overflow valve plate 330 exceeds the outer circumference of the valve seat abutting ring platform 325 may be 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or 0.5 mm.

[0090] Such arrangement can, on the one hand, prevent the outer circumference of the overflow valve disc 330 from exceeding the outer circumference of the valve seat abutting the annular platform 325 by too small a distance A, and can reduce the machining accuracy requirements for the overflow valve disc 330 and the overflow valve seat 320, which is beneficial to saving the manufacturing cost of parts and components. Moreover, when the flow regulating valve 300 is in a closed state at the initial position and the shock absorber 1 is in a compression condition, the fluid can flow along the guide surface 326 to the side of the outer edge of the overflow valve disc 330 facing the overflow valve seat 320, so as to facilitate pushing the overflow valve disc 330 to open. On the other hand, it can prevent the outer circumference of the overflow valve disc 330 from exceeding the outer circumference of the valve seat abutting the annular platform 325 by too large a distance A, and thus prevent the outer diameter of the overflow valve disc 330 from being too large, which is convenient for assembly.

[0091] In some specific embodiments of the present invention, Figure 6 , Figure 8 and Fig.10 As shown, the overflow valve plate 330 is configured with at least one communicating hole 331 , and the second flow channel 311 is communicated with the first flow channel 321 through the communicating hole 331 .

[0092] In this way, when the overflow valve body 310 is separated from the overflow valve plate 330 and the overflow valve seat 320 is in contact with the overflow valve plate 330, that is, the second flow channel 311 is opened and the third flow channel 322 is closed, the second flow channel 311 can be connected with the first flow channel 321 through the connecting hole 331, and the structural setting is more reasonable, so that the fluid in the recovery chamber 112 and the compression chamber 111 can flow through the second flow channel 311, the connecting hole 331 and the first flow channel 321.

[0093] In addition, there may be a plurality of communicating holes 331 , and the plurality of communicating holes 331 may be arranged at intervals along the circumferential direction of the overflow valve plate 330 .

[0094] A vibration absorber 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0095] The shock absorber 1 includes a cylinder 100 , a piston 200 , a flow regulating valve 300 according to the above embodiment of the present invention, and a control valve.

[0096] The shock absorber 1 according to the embodiment of the present invention can reduce the flow resistance of the fluid flowing through the flow regulating valve 300 by utilizing the flow regulating valve 300 according to the above-mentioned embodiment of the present invention, so as to adjust the fluid flow through the flow regulating valve 300, and further facilitate the adjustment of the damping force of the shock absorber 1.

[0097] A vehicle according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The vehicle includes the shock absorber 1 according to the above-described embodiment of the present invention.

[0098] According to the vehicle of the embodiment of the present invention, by utilizing the shock absorber 1 according to the above-mentioned embodiment of the present invention, the flow resistance of the fluid flowing through the flow regulating valve 300 can be reduced, so as to facilitate the adjustment of the fluid flow through the flow regulating valve 300, and further facilitate the adjustment of the damping force of the shock absorber 1.

[0099] The overflow valve seat 320 for the shock absorber, the flow regulating valve 300, the shock absorber 1 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0100] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0101] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A relief valve seat (320) for a shock absorber, characterized in that: include: A valve seat abutting ring platform (325), wherein the valve seat abutting ring platform (325) is arranged on a side of the overflow valve seat (320) facing the overflow valve body (310) of the shock absorber (1); A valve seat guide surface (326), the valve seat guide surface (326) being arranged on a side of the overflow valve seat (320) facing the overflow valve body (310), and the valve seat guide surface (326) being located radially outside the valve seat abutting ring platform (325).

2. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: Along the radial direction of the overflow valve seat (320), the distance between any point of the valve seat guide surface (326) and the radial outer side of the valve seat abutting ring platform (325) is X; Along the axial direction of the overflow valve seat (320), the distance between any point of the valve seat guide surface (326) and the end of the valve seat abutting ring platform (325) facing the overflow valve body (310) is Y; X and Y satisfy: Y / X>0.

5.

3. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: Along the radial direction of the overflow valve seat (320), the radial thickness of the valve seat abutting the annular platform (325) is T, and T satisfies: T≤0.2 mm.

4. The overflow valve seat (320) for a shock absorber according to claim 3, characterized in that: Along the radial direction of the overflow valve seat (320), the radial thickness of the valve seat abutting the annular platform (325) is T, and T satisfies: T>0.15 mm.

5. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: The valve seat guide surface (326) comprises: a first step surface (328), the first step surface (328) being connected to the radial outer side of the valve seat abutting ring platform (325) and extending in the radial direction of the overflow valve seat (320), and the valve seat abutting ring platform (325) exceeds the first step surface (328) in a direction approaching the overflow valve body (310); A second step surface (329), the second step surface (329) is connected to the radial outer side of the first step surface (328) and extends radially along the overflow valve seat (320), and the first step surface (328) exceeds the second step surface (329) in a direction approaching the overflow valve body (310).

6. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: The valve seat guide surface (326) comprises: a third step surface (3262), the third step surface (3262) being connected to the radial outer side of the valve seat abutting ring platform (325) and extending in the radial direction of the overflow valve seat (320), and the valve seat abutting ring platform (325) exceeds the third step surface (3262) in a direction approaching the overflow valve body (310); An inclined surface (3261), wherein the inclined surface (3261) is connected to the radial outer side of the third step surface (3262), and gradually moves away from the overflow valve body (310) along the radial direction outward of the overflow valve seat (320).

7. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: The valve seat guide surface (326) comprises an inclined surface (3261), the inclined surface (3261) being connected to the radial outer side of the valve seat abutting ring platform (325), and the inclined surface (3261) gradually moves away from the overflow valve body (310) along the radial outward direction of the overflow valve seat (320); Wherein, along the axial direction of the overflow valve seat (320) approaching the overflow valve body (310), the valve seat abuts against an end of the ring platform (325) that exceeds the inclined surface (3261) and is adjacent to the overflow valve body (310).

8. The overflow valve seat (320) for a shock absorber according to claim 1, characterized in that: The valve seat guide surface (326) comprises an inclined surface (3261), the inclined surface (3261) being connected to the radial outer side of the valve seat abutting ring platform (325), and gradually moving away from the overflow valve body (310) along the radial direction outward of the overflow valve seat (320); Wherein, along the axial direction of the overflow valve seat (320), one end of the inclined surface (3261) adjacent to the overflow valve body (310) is flush with one end of the valve seat abutting ring platform (325) facing the overflow valve body (310).

9. The overflow valve seat (320) for a shock absorber according to any one of claims 5 to 7, characterized in that: Along the axial direction of the overflow valve seat (320) toward the overflow valve body (310), the dimension of the valve seat abutting ring platform (325) beyond the valve seat guide surface (326) at one end adjacent to the overflow valve body (310) is B, and B satisfies: 0.4 mm ≤ B ≤ 0.6 mm.

10. The overflow valve seat (320) for a shock absorber according to any one of claims 6 to 8, characterized in that: The angle between the inclined surface (3261) and the radial direction of the overflow valve seat (320) is β, and β satisfies: 35°≤β≤55°.

11. A flow control valve (300) for a shock absorber (1), characterized in that: include: The overflow valve seat (320) according to any one of claims 1 to 10; A relief valve body (310), the relief valve body (310) being movably disposed on one side of the relief valve seat (320); The overflow valve plate (330) is movably disposed between the overflow valve body (310) and the overflow valve seat (320), and the overflow valve plate (330) abuts against the valve seat abutment ring (325).

12. The flow control valve (300) for a shock absorber (1) according to claim 11, characterized in that: Along the radially outward direction of the overflow valve seat (320), the distance by which the outer circumferential surface of the overflow valve plate (330) exceeds the outer circumferential surface of the valve seat abutting ring platform (325) is A, and A satisfies 0.15 mm≤A≤0.5 mm.

13. The flow control valve (300) for a shock absorber (1) according to claim 11, characterized in that: The overflow valve seat (320) is provided with a first flow channel (321), and the first flow channel (321) is suitable for communicating with the compression chamber (111) of the shock absorber (1); A second flow channel (311) is formed between the overflow valve plate (330) and the overflow valve body (310), and a third flow channel (322) is formed between the overflow valve plate (330) and the overflow valve seat (320), the second flow channel (311) and the third flow channel (322) being respectively connected to the first flow channel (321) and are both connected to the recovery chamber (112) of the shock absorber (1); The second flow channel (311) and / or the third flow channel (322) are opened and closed by the movement of the overflow valve body (310).

14. The flow control valve (300) for a shock absorber (1) according to claim 13, characterized in that: The overflow valve plate (330) is configured with at least one communicating hole (331), and the second flow channel (311) is connected to the first flow channel (321) through the communicating hole (331).

15. A shock absorber (1), characterized in that: include: Cylinder (100); A piston (200), the piston (200) being movably disposed on the cylinder (100), and the piston (200) separating a compression chamber (111) and a recovery chamber (112) in the cylinder (100); The flow regulating valve (300) according to any one of claims 11 to 14, wherein the flow regulating valve (300) is arranged in the piston (200) and is respectively connected to the compression chamber (111) and the recovery chamber (112); A control valve (400) is provided on the piston (200), and the control valve (400) adjusts the fluid flow between the compression chamber (111) and the recovery chamber (112) by controlling the flow regulating valve (300).

16. A vehicle, characterized in that: Comprising a vibration damper (1) according to claim 15.

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