One-way valves and shock absorbers

Abstract

A one-way valve and a vibration damper are disclosed. The one-way valve includes a cylinder and a seal. The cylinder includes a cylinder wall and a cylinder opening penetrating the cylinder wall. The seal is located inside the cylinder and includes a sealing portion covering the cylinder opening and a fitting portion surrounding the cylinder opening. The seal is configured to open the cylinder opening under the pressure of a fluid applied from the outside of the cylinder to the inside of the cylinder, and to seal the cylinder opening under the pressure of a fluid applied from the inside of the cylinder to the outside of the cylinder. The fitting portion fits onto the inner surface of the cylinder wall.

Description

Technical Field

[0001] At least one embodiment of this disclosure relates to a one-way valve and a vibration damper. Background Technology

[0002] In a car's suspension system, because the springs themselves reciprocate while filtering road vibrations, shock absorbers are typically installed to improve ride comfort and suppress the oscillations caused by the springs rebounding after absorbing shocks. Therefore, shock absorbers reduce vibrations in the chassis and body to improve ride comfort.

[0003] Shock absorbers dampen vibrations and improve vehicle ride comfort. The working principle of a shock absorber is that when the vehicle frame (or body) and axle vibrate and move relative to each other, the piston inside the shock absorber moves up and down. The oil in the shock absorber chamber repeatedly flows from one chamber to another through different orifices. At this time, the friction between the orifice walls and the oil, as well as the internal friction between oil molecules, creates a damping force on the vibration, converting the vehicle's vibration energy into heat energy in the oil, which is then absorbed by the shock absorber and dissipated into the atmosphere. Shock absorbers often incorporate multiple valves, such as check valves, to control the direction and flow rate of the oil, thereby regulating the damping effect. Summary of the Invention

[0004] At least one embodiment of this disclosure provides a one-way valve, which includes a cylinder and a seal. The cylinder includes a cylinder wall and a cylinder opening penetrating the cylinder wall; the seal is located inside the cylinder and includes a sealing portion covering the cylinder opening and a fitting portion surrounding the cylinder opening; the seal is configured to open the cylinder opening under the pressure of a fluid applied from the outside of the cylinder to the inside of the cylinder, and to seal the cylinder opening under the pressure of a fluid applied from the inside of the cylinder to the outside of the cylinder; the fitting portion fits against the inner surface of the cylinder wall.

[0005] For example, in a one-way valve provided in one embodiment of this disclosure, the fitting portion surrounds the entire opening of the cylinder; the fitting portion includes an inner edge portion surrounding and adjacent to the edge of the opening of the cylinder, the inner edge portion surrounding the entire edge of the opening of the cylinder; when the opening of the cylinder is in a sealed state, the inner edge portion is fitted to the inner surface of the cylinder wall.

[0006] For example, in a one-way valve provided in one embodiment of this disclosure, the area of ​​the fitting portion is larger than the opening area of ​​the cylinder opening.

[0007] For example, in a one-way valve provided in one embodiment of this disclosure, no other structure other than the fitting portion is provided in the region of the cylinder wall surrounding the edge of the cylinder opening and close to the edge of the cylinder opening.

[0008] For example, a one-way valve provided in one embodiment of this disclosure further includes a fixing structure, and the fitting portion further includes an outer edge portion surrounding the inner edge portion, the fixing structure being configured to fix the outer edge portion of the fitting portion of the seal to the cylinder wall.

[0009] For example, in a one-way valve provided in one embodiment of this disclosure, the fixing structure and the cylinder opening are spaced apart by a first distance along the circumference of the cylinder, and the first distance is greater than the radial dimension of the cylinder opening.

[0010] For example, in a one-way valve provided in one embodiment of this disclosure, the one-way valve includes a plurality of cylinder openings, and the first distance is greater than the circumferential distance between adjacent cylinder openings.

[0011] For example, in a one-way valve provided in one embodiment of this disclosure, the fixing structure includes a fixing member and a first fixing hole penetrating the fitting portion, the fixing member passing through the first fixing hole and being fixedly connected to the cylinder wall.

[0012] For example, in a one-way valve provided in one embodiment of this disclosure, the cylinder further includes a second fixing hole penetrating the cylinder wall, and the fixing member penetrates the second fixing hole and the first fixing hole.

[0013] For example, in a one-way valve provided in one embodiment of this disclosure, the fixing member is a protrusion protruding from the inner side of the cylinder wall, and the protrusion passes through the first fixing hole.

[0014] For example, in a one-way valve provided in one embodiment of this disclosure, the diameter of the first fixing hole is larger than the radial dimension of the fixing member.

[0015] For example, in a one-way valve provided in one embodiment of this disclosure, at the location of the fixing structure, there is a gap between the outer edge of the fitting portion and the inner surface of the cylinder wall.

[0016] For example, in a one-way valve provided in one embodiment of this disclosure, the sealing element is an integrally formed one-piece structure, which is a closed annulus or an open annulus.

[0017] For example, in a one-way valve provided in one embodiment of this disclosure, the one-way valve includes a plurality of cylindrical openings, and the sealing element includes a plurality of sub-parts corresponding to the plurality of cylindrical openings, each sub-part including the sealing part and the fitting part; the plurality of sub-parts are spaced apart from each other, or adjacent sub-parts are connected to each other.

[0018] For example, in a one-way valve provided in one embodiment of this disclosure, the cylinder opening includes a plurality of opening units spaced apart from each other, each opening unit including a plurality of sub-openings close to each other; when the sealing member is an integrally formed one-piece structure, the sealing member covers the plurality of opening units; when the sealing member includes a plurality of sub-parts corresponding to the plurality of cylinder openings respectively, each sub-part covers a plurality of sub-openings in one opening unit, and the fixing structure is located at the edge of each sub-part.

[0019] For example, in a one-way valve provided in one embodiment of this disclosure, the sealing element is a sheet-like elastic element.

[0020] At least one embodiment of this disclosure also provides a vibration damper, which includes any one-way valve used in the embodiments of this disclosure, a first cylinder, a second cylinder, and a third cylinder. A piston assembly is disposed inside the first cylinder; the second cylinder is disposed outside the first cylinder, forming a first fluid channel between the second and the first cylinder; the third cylinder is disposed outside the second cylinder, forming a second fluid channel between the third and the second cylinder; the second cylinder serves as the cylinder of the one-way valve.

[0021] For example, in a vibration damper provided in one embodiment of this disclosure, the face of the seal facing the second cylinder is in contact with the inner wall of the second cylinder, the face of the seal facing the first cylinder is spaced apart from the first cylinder, and at each position, the distance between the face of the seal facing the first cylinder and the first cylinder is substantially equal.

[0022] For example, one embodiment of the present disclosure provides a vibration damper including a compression valve and a recovery valve, wherein a second cylinder is connected to the compression valve and the recovery valve; when the piston assembly performs a compression action, the compression valve opens, and fluid having a tendency to flow from the second fluid channel to the first fluid channel applies pressure to the seal from the second fluid channel to the first fluid channel, thereby opening the seal; when the piston assembly performs a recovery action, the recovery valve opens, and fluid having a tendency to flow from the first fluid channel to the second fluid channel applies pressure to the seal from the first fluid channel to the second fluid channel, thereby closing the seal. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of a one-way valve provided in one embodiment of the present disclosure;

[0025] Figure 2 yes Figure 1 The front view of the check valve shown;

[0026] Figure 3 It is along Figure 2 A schematic diagram of the cross-section of line AA in the diagram;

[0027] Figure 4 yes Figure 1 A schematic diagram of the cylinder of the one-way valve shown;

[0028] Figure 5 yes Figure 1 A schematic diagram of the sealing element of the one-way valve is shown.

[0029] Figure 6 This is a schematic diagram of another one-way valve provided in an embodiment of the present disclosure;

[0030] Figure 7 yes Figure 6 The front view of the check valve shown;

[0031] Figure 8 It is along Figure 7 A schematic diagram of the cross-section of line AA in the diagram;

[0032] Figure 9 yes Figure 6 A schematic diagram of the cylinder of the one-way valve shown;

[0033] Figure 10 yes Figure 6 A schematic diagram of the sealing element of the one-way valve is shown.

[0034] Figure 11 This is a schematic diagram of the external structure of a vibration damper provided in one embodiment of the present disclosure;

[0035] Figure 12 This is a schematic diagram of the first cross-section of a vibration damper provided in an embodiment of this disclosure;

[0036] Figure 13 This is a schematic diagram of the second cross-section of a vibration damper provided in one embodiment of the present disclosure;

[0037] Figure 14 yes Figure 12 This includes a partially enlarged schematic diagram of a one-way valve provided in an embodiment of this disclosure;

[0038] Figure 15 yes Figure 13 This includes a partially enlarged schematic diagram of a one-way valve provided in an embodiment of this disclosure. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "inner," "outer," "upper," and "lower" are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0041] The accompanying drawings in this disclosure are not drawn to scale. The number of openings in the cylinder, the number of opening units, and the number of sub-openings in the one-way valve are not limited to the quantities shown in the drawings. The specific dimensions and quantities of each structure can be determined according to actual needs. The accompanying drawings described in this disclosure are only structural schematic diagrams.

[0042] At least one embodiment of this disclosure provides a one-way valve, which includes a cylinder and a seal. The cylinder includes a cylinder wall and a cylinder opening penetrating the cylinder wall; the seal is located inside the cylinder and includes a sealing portion covering the cylinder opening and a fitting portion surrounding the cylinder opening; the seal is configured to open the cylinder opening under the pressure of a fluid applied from the outside of the cylinder to the inside of the cylinder, and to seal the cylinder opening under the pressure of a fluid applied from the inside of the cylinder to the outside of the cylinder; the fitting portion fits against the inner surface of the cylinder wall.

[0043] In the one-way valve provided in this disclosure, the sealing of the cylinder opening is achieved by a fitting portion surrounding the cylinder opening and a sealing portion covering the cylinder opening, and the cylinder opening is opened under the pressure of fluid flowing in a specific direction, thus realizing one-way flow control of the fluid. That is, the fitting portion of the sealing element surrounds the cylinder opening and directly adheres to the inner wall of the cylinder. The size and coverage of the sealing element can be made larger, and there is no need to set a support member near the cylinder opening to fix the sealing element. Compared with the scheme of fixing one end of the sealing element to the inner side of the cylinder by a support and fixing member, and the edge of the non-fixed end of the sealing element overlapping the fitting surface on the inner side of the cylinder to achieve sealing, the structure of the one-way valve provided in this disclosure is greatly simplified, the types and number of parts are reduced, and the processing and installation are also easier. Furthermore, judging from the working effect of the one-way valve provided in the embodiments of this disclosure, under this design, the high-pressure fluid outside the cylinder can more easily cause the seal to deform and open the cylinder opening. When the high-pressure fluid inside the cylinder causes the seal to seal the cylinder opening, the fitting part around the cylinder opening can seal the cylinder opening more tightly. As a result, the one-way valve has stronger working reliability and stability.

[0044] For example, Figure 1 This is a schematic diagram of the structure of a one-way valve provided in one embodiment of the present disclosure. Figure 2 yes Figure 1 The front view of the check valve shown is shown. Figure 3 It is along Figure 2 A schematic diagram of the cross-section of line AA in the diagram. Figure 4 yes Figure 1 The diagram shown is a structural schematic of the cylinder of the one-way valve. Figure 5 yes Figure 1 The diagram shows the structural structure of the seal of the one-way valve.

[0045] refer to Figure 1-5 An embodiment of the present disclosure provides a one-way valve 10 including a cylinder 1 and a seal 2. The cylinder 1 includes a cylinder wall 11 and a cylinder opening 12 penetrating the cylinder wall 11; the seal 2 is located inside the cylinder and includes a sealing portion 21 covering the cylinder opening 12 and a fitting portion 22 surrounding the sealing portion 21; the seal 2 is configured to open the cylinder opening 12 under the pressure of a fluid applied from the outside of the cylinder 1 to the inside of the cylinder 1, and to seal the cylinder opening 12 under the pressure of a fluid applied from the inside of the cylinder 1 to the outside of the cylinder 1.

[0046] The fluid can be a liquid, such as hydraulic oil, or a gas, etc. The embodiments of this disclosure do not limit the specific form of the fluid.

[0047] The one-way valve 10 provided in this embodiment can be applied in a vibration damper to regulate the flow direction and flow rate of fluid, thereby damping the fluid flow process. The one-way valve 10 provided in this embodiment utilizes a fitting portion 22 surrounding the cylinder opening 12 in conjunction with a sealing portion 21 covering the cylinder opening 12 to seal the cylinder opening 12 and open the cylinder opening 12 under the pressure of fluid flowing in a specific direction, achieving one-way flow control of the fluid. That is, the fitting portion 22 of the sealing element 2 surrounds the cylinder opening 12, and the fitting portion 22 of the sealing element 2 directly adheres to the inner surface 11a of the cylinder wall 11. The size and coverage area of ​​the sealing element 2 can be made larger, eliminating the need for a support member near the cylinder opening 12 to fix the sealing element 2. Compared to a scheme where one end of the sealing element is fixed to the inner side of the cylinder by a support member, and the edge of the non-fixed end of the sealing element overlaps the fitting surface on the inner side of the cylinder to achieve a seal, the structure of the one-way valve provided in this embodiment is greatly simplified, the types and number of parts are reduced, and processing and installation are easier. Furthermore, judging from the working effect of the one-way valve 10 provided in the embodiments of this disclosure, under this design, the high-pressure fluid outside the cylinder 1 makes it easier for the sealing element 2 to deform and open the cylinder opening 12. When the high-pressure fluid inside the cylinder 1 causes the sealing element 2 to seal the cylinder opening 12, the fitting part 22 around the cylinder opening 12 can seal the cylinder opening 12 more tightly. As a result, the working reliability of the one-way valve 10 is stronger.

[0048] For example, the seal 2 is elastic. For example, the seal 2 is a sheet-like elastic element, such as a spring. After the seal 2 is placed on the inner surface of the cylinder wall 11, the sheet-like seal 2 can bend to adapt to the shape of the inner surface of the cylinder wall 11, and the seal 2 adheres to the inner surface 11a of the cylinder wall 11 under its own elasticity. When the fluid pressure on the outside of the cylinder 1 is greater than the pressure on the inside of the cylinder 1, the seal 2 undergoes elastic deformation under the pressure of the fluid applying pressure from the outside to the inside of the cylinder 1. At least the sealing part 21 is recessed towards the inside of the cylinder 1, thereby opening the cylinder opening 12 and allowing fluid to enter the inside of the cylinder 1 from the outside through the cylinder opening 12. When the fluid pressure on the inside of the cylinder 1 is greater than the pressure on the outside of the cylinder 1, at least the sealing part 21 moves towards the cylinder wall 11 under the pressure of the fluid applying pressure from the inside to the outside of the cylinder 1. The sealing part 21 seals the cylinder opening 12, and the fitting part 22 is tightly fitted to the inner surface 11a of the cylinder wall 11, sealing the cylinder opening 12 and preventing fluid from flowing through the cylinder opening 12.

[0049] refer to Figure 5For example, the material of the seal 2 includes metallic materials, such as metals, alloys, stainless steel, etc. For instance, the thickness of the sheet-like elastic element is 0.1mm to 0.5mm. Of course, the material and thickness of the seal 2 are not limited to the types of materials and thickness ranges listed above. The material, thickness, and dimensions of the elastic element can be designed according to the specific flow control requirements of the fluid to achieve a predetermined opening and closing threshold pressure and opening / closing degree, thereby regulating the fluid flow. This disclosure does not limit these specific parameters of the seal.

[0050] For example, refer to Figure 1 and Figure 5 The fitting portion 22 surrounds the entire opening 12 of the cylinder, that is, it fits and covers the outer periphery of the entire edge of the opening 12 of the cylinder. (Reference) Figure 5 The fitting portion 22 includes an inner edge portion 221 that surrounds and is adjacent to the edge of the cylinder opening 12. The inner edge portion 221 surrounds and is adjacent to the entire edge of the cylinder opening 12. It can be understood that the inner edge portion 221 is a ring-shaped portion that surrounds the entire circle, and it is an integral part with the outer edge portion mentioned below. When the cylinder opening 12 is in a sealed state, the inner edge portion 221 is fitted onto the inner surface 11a of the cylinder wall 11. As a result, the seal can fit and cover the entire periphery of the cylinder opening 12. With this design, the high-pressure fluid outside the cylinder 1 can more easily cause the seal 2 to deform and open the cylinder opening 12. When the high-pressure fluid inside the cylinder 1 causes the seal 2 to seal the cylinder opening 12, the fitting portion 22 surrounding the cylinder opening 12 can seal the cylinder opening 12 more tightly. As a result, the working reliability of the one-way valve 10 is stronger.

[0051] For example, the area of ​​the fitting portion 22 is larger than the opening area of ​​a cylindrical opening 12. For instance, the area of ​​the fitting portion 22 is significantly larger than the opening area of ​​a cylindrical opening 12, for example, more than 10 times or 20 times the area of ​​a cylindrical opening 12. A sub-opening 120 in the following text corresponds to a cylindrical opening. The larger fitting portion 22 allows the one-way valve to achieve unidirectional flow of the control fluid without relying on a support to fix one end of the seal or to some extent limit the deformation and movement range of the seal. This is achieved solely through the cooperation of the cylindrical body 1 and the elastic seal 2, which adheres to the inner surface 11a of the cylindrical body wall 11.

[0052] For example, in the area of ​​the cylinder wall 11 surrounding and adjacent to the edge of the cylinder opening 12, no other structure other than the fitting part 22 is provided. For example, "the area adjacent to or adjacent to the edge of the cylinder opening 12" refers to the area within a first dimension range in the radial direction from the edge of the cylinder opening 12, where the first dimension is greater than or equal to the radial dimension of one cylinder opening 12. That is, the area of ​​the fitting part is relatively large, and it is attached to the inner surface 11a of the cylinder wall 11 around the cylinder opening 12, which has a large area. It is not necessary to provide a support member near the edge of the cylinder opening 12 to fix the fitting part 22, which greatly simplifies the structure of the one-way valve, reduces the difficulty of manufacturing and assembly, and improves the smoothness and reliability of operation.

[0053] For example, refer to Figure 1-2 The cylinder 1 is bent axially, that is, bent circumferentially. For example, refer to... Figure 2 The two dashed lines represent the first edge E1 and the second edge E2 of the seal 2, extending circumferentially. Axially, the cylindrical opening 12 has a first edge H1 and a second edge H2 that are opposite each other. It is understood that when the cylindrical opening 12 is circular, the first edge H1 and the second edge H2 can be points (e.g., the two endpoints of a diameter along the axial direction) or arc segments that are opposite each other axially. The first edge E1 and the second edge E2 are opposite each other axially, with the first edge E1 of the seal 2 close to the first edge H1 of the cylindrical opening 12, and the second edge H2 of the seal 2 close to the second edge H2 of the cylindrical opening 12. For example, the axial distance d1 between the first edge E1 of the seal 2 and the first edge H1 of the cylindrical opening 12 is greater than the axial radial width of the cylindrical opening 12, for example, greater than N times the axial radial width of the cylindrical opening 12, where N is greater than 0. For example, N is less than or equal to 10. For example, N is less than or equal to 20. Of course, N can also be greater than 10 or greater than 20. This embodiment does not limit the specific value of N, and it can be designed according to needs to achieve the required adjustment of the damping of the fluid in conjunction with other parameters. This results in a relatively large contact area, much larger than the opening area of ​​the cylinder opening. The contact part 22 is attached to the inner surface 11a of the cylinder wall 11, which covers a large area around the cylinder opening 12. Therefore, it is not necessary to set up support members near the edge of the cylinder opening 12 to fix the contact part 22, greatly simplifying the structure of the one-way valve, reducing manufacturing and assembly difficulty, and improving operational stability and reliability.

[0054] For example, the shape of the cylinder 1 is generally a cylinder with the axial direction as the central axis. Of course, it is not limited to a cylindrical shape. Using a cylindrical shape facilitates the processing of the cylinder and facilitates the flow of fluid. Correspondingly, the sealing element that fits on the inner surface 11a of the cylinder wall 11 is also curved in an arc shape corresponding to the inner surface 11a of the cylinder wall 11.

[0055] For example, refer to Figure 1 and Figure 5 The one-way valve 10 also includes a fixing structure 3. The fitting part 22 also includes an outer edge part 222 surrounding the inner edge part 221. The fixing structure 3 is configured to fix the outer edge part 222 of the fitting part 22 of the seal 2 to the cylinder wall 11, thereby keeping the position of the seal 2 fixed and preventing it from slipping during operation.

[0056] The fixing structure 3 is located a considerable distance from the cylinder opening. For example, the fixing structure 3 is spaced a first distance from the cylinder opening 12 along the circumference of the cylinder. This first distance is greater than the radial dimension of the cylinder opening 12, for example, greater than the radial dimension of the cylinder opening 12 in any direction. It is understood that when the cylinder opening 12 is circular, its radial dimensions are equal in all directions. The shape of the cylinder opening 12 can also be a rectangle, a polygon, an ellipse, or an irregular shape, with different radial dimensions in different directions.

[0057] For example, the one-way valve 10 includes a plurality of cylindrical openings 12, the first distance being greater than the circumferential distance between adjacent cylindrical openings 12. "Circumferential distance between adjacent cylindrical openings 12" refers to the circumferential distance between the closest edges of adjacent cylindrical openings 12, or the circumferential distance between the geometric centers of adjacent cylindrical openings 12.

[0058] For example, refer to Figure 1 The fixing structure 3 includes a fixing member 31 and a first fixing hole 32 penetrating the fitting portion 22. The fixing member 31 passes through the first fixing hole 32 and is fixedly connected to the cylinder wall 11 to fix the sealing member 2 to the cylinder 1. For example, the first fixing hole 32 penetrates the outer edge portion 222 of the fitting portion 22. The fixed connection between the sealing member 2 and the cylinder 1 means that the overall position of the sealing member 2 is fixed relative to the cylinder 1, rather than that the sealing member 2 cannot move at all relative to the cylinder 1. For example, the sealing member 2 can undergo a small range of elastic deformation.

[0059] For example, refer to Figure 4 The cylinder 1 also includes a second fixing hole 13 penetrating the cylinder wall 11, and a fixing member 31 penetrating the second fixing hole 13 and the first fixing hole 32 to fix the sealing member 2 to the cylinder 1. For example, the fixing member 31 can be a screw or a bolt.

[0060] Alternatively, in other embodiments, the fixing member 31 is a protrusion protruding from the inner side of the cylinder 1 and extending through the first fixing hole 32 to fix the sealing member 2 to the cylinder 1. For example, the protrusion is integrally formed with the cylinder 1, or the protrusion is welded to the cylinder 1.

[0061] For example, the diameter of the first fixing hole 32 is larger than the radial dimension of the fixing member 31, so there is a margin between the first fixing hole 32 and the fixing member 31, that is, there is a gap between the hole wall of the first fixing hole 32 and the fixing member 31. Since the sheet-like sealing member 2 itself is elastic, the sealing member 2 adheres to the inner surface of the cylinder wall 11. Near the columnar fixing member 31, since there is a gap between the hole wall of the first fixing hole 32 and the fixing member 31, the sealing member 2 tends to return to its natural state, thereby generating elastic force. Thus, at the location of the fixing structure 3, there is a gap S between the outer edge portion 222 of the fitting portion 22 and the inner surface 11a of the cylinder wall 11.

[0062] When the fluid outside the cylinder 1 applies pressure to the seal 2, the seal 2 undergoes elastic deformation. During this process, the gap S gradually decreases, which facilitates the sealing portion 21 covering the cylinder opening 12 to recess towards the inside of the cylinder 1, or the inner edge portion 221 of the fitting portion adjacent to the edge of the cylinder opening 12 to also be adjacent to the inner edge portion 221 of the cylinder opening 12, thereby opening the cylinder opening 12. Fluid then enters the inside of the cylinder 1 from the outside through the cylinder opening 12. The gap S helps the sealing portion 21 to more easily undergo elastic deformation under the pressure of the fluid outside the cylinder 1, thus making it easier to open the cylinder opening 12.

[0063] For example, seal 2 can be a one-piece structure that is integrally molded and is a closed ring. Alternatively, seal 2 can be a one-piece structure that is not a closed ring.

[0064] For example, the one-way valve 10 includes multiple cylindrical openings 12, and the seal covering the multiple cylindrical openings 12 is an integrally formed one-piece structure; the seal covering the multiple cylindrical openings 12 is a closed annulus, or, or an open annulus, that is, while ensuring that the above technical features are met, the seal does not necessarily have to be a closed annulus structure.

[0065] For example, in Figure 1-5 In the illustrated embodiment, the one-way valve 10 includes a plurality of cylindrical openings 12, and the seal 2 includes a plurality of sub-parts corresponding to the plurality of cylindrical openings 12, each sub-part including a sealing part 21 and a fitting part 22. For example, adjacent sub-parts can be connected to each other, for example, by means of a fixing structure 3.

[0066] For example, refer to Figure 5The seal 2 comprises multiple sub-parts, including a first sub-part 2a and a second sub-part 2b. For example, the first sub-part 2a and the second sub-part 2b are adjacent and connected to each other by a fixing structure 3. For example, the first sub-part 2a has a first fixing hole 32a and a second fixing hole 32c respectively penetrating its two ends of the outer edge portion 222, and the second sub-part 2b has a first fixing hole 32b and a second fixing hole 32d respectively penetrating its two ends of the outer edge portion 222. Figure 1 The two ends of the first sub-part 2a and the second sub-part 2b are fixed by two fasteners 31 respectively. The first fastener 31 passes through the first fixing hole 32a and the first fixing hole 32b to connect the first end of the first sub-part 2a and the first end of the second sub-part 2b and fix them to the cylinder wall 11. The second fastener 31 passes through the first fixing hole 32c and the first fixing hole 32d to connect the second end of the first sub-part 2a and the second end of the second sub-part 2b and fix them to the cylinder wall 11.

[0067] It should be noted that the first end and the second end of the first sub-part 2a are the two ends of the first sub-part 2a in the circumferential direction, and the first end and the second end of the second sub-part 2b are the two ends of the second sub-part 2b in the circumferential direction.

[0068] For example, refer to Figure 1-5 The cylinder opening 12 includes a plurality of opening units OP arranged at intervals between each other, and each opening unit OP includes a plurality of sub-openings 120 close to each other. Figure 5 The dashed lines in the diagram represent portions of seal 2 corresponding to the multiple sub-openings 120.

[0069] In other embodiments, where the seal 2 is a one-piece structure integrally formed, the seal 2 covers multiple opening units OP.

[0070] refer to Figure 1-5 In the case where the sealing member 2 includes multiple sub-parts corresponding to multiple cylindrical openings 12, each sub-part of the sealing member 2 covers multiple sub-openings 120 of an opening unit OP, and the fixing structure 3 is located at the edges of both ends of each sub-part to fix both ends of each sub-part to the cylindrical wall 11 by means of the fixing structure. For example, refer to Figure 4 The multiple opening units OP include a first opening unit OP1 and a second opening unit OP2. A first sub-part 2a covers multiple sub-openings 120 of the first opening unit OP1, and a second sub-part 2b covers multiple sub-openings 120 of the second opening unit OP2.

[0071] Figure 1-5The illustrated embodiment uses two opposing opening units OP of the cylindrical opening 12 as an example. The number of opening units is not limited to two; for example, it can be one, three, four, etc. The position of the opening units or the position of a single cylindrical opening is not limited to the position shown in the figure. Those skilled in the art can design the number and position of the cylindrical units, or the number and position of a single cylindrical opening, according to specific needs.

[0072] Figure 6 This is a schematic diagram of another one-way valve provided in an embodiment of the present disclosure; Figure 7 yes Figure 6 The front view of the check valve shown; Figure 8 It is along Figure 7 A schematic diagram of the cross-section of line AA in the diagram; Figure 9 yes Figure 6 A schematic diagram of the cylinder of the one-way valve shown; Figure 10 yes Figure 6 The diagram shows the structural structure of the seal of the one-way valve.

[0073] Figure 6-10 The illustrated embodiments and Figure 1-5 The illustrated embodiments have the following differences. (See reference) Figure 6-10 Multiple sub-parts of the sealing element 2 are spaced apart and abutted against the inner surface 11a of the cylinder wall 11. For example, both ends of each sub-part are fixed to the cylinder wall 11 by a fixing structure. Exemplarily, the multiple opening units OP include a first opening unit OP1 and a second opening unit OP2. The first sub-part 2a covers multiple sub-openings 120 of the first opening unit OP1, and the second sub-part 2b covers multiple sub-openings 120 of the second opening unit OP2. The first sub-part 2a has a first fixing hole 32e and a second fixing hole 32f respectively penetrating its outer edge portions 222 at both ends, and the second sub-part 2b has a first fixing hole 32g and a second fixing hole 32h respectively penetrating its outer edge portions 222 at both ends. Figure 6 Two fasteners 31a and 31b pass through the first fixing hole 32e and the second fixing hole 32f, respectively, to fix both ends of the first sub-part 2a to the cylinder wall 11; another two fasteners 31c and 31d pass through the first fixing hole 32g and the second fixing hole 32h, respectively, to fix both ends of the second sub-part 2b to the cylinder wall 11. The first sub-part 2a and the second sub-part 2b, which are attached to the cylinder wall 11, are spaced apart.

[0074] Figure 6-10 Other technical features and corresponding technical effects of the embodiments shown are similar to those of the embodiments shown. Figure 1-5 The embodiments shown are the same; please refer to the previous description, and will not be repeated here.

[0075] At least one embodiment of this disclosure also provides a shock absorber, which includes any of the one-way valves provided in the embodiments of this disclosure. This shock absorber can be applied to transportation equipment, such as to various types of vehicles, for vehicle vibration reduction and to improve vehicle ride comfort.

[0076] For example, Figure 11 This is a schematic diagram of the external structure of a vibration damper provided in one embodiment of the present disclosure; Figure 12 This is a schematic diagram of the first cross-section of a vibration damper provided in an embodiment of this disclosure; Figure 13 This is a schematic diagram of the second cross-section of a vibration damper provided in one embodiment of the present disclosure; Figure 14 yes Figure 12 This includes a partially enlarged schematic diagram of a one-way valve provided in an embodiment of this disclosure; Figure 15 yes Figure 13 This includes a partially enlarged schematic diagram of a one-way valve provided in an embodiment of this disclosure.

[0077] refer to Figure 11-15 The vibration damper 500 provided in at least one embodiment of this disclosure includes a first cylinder 110, a second cylinder 120, and a third cylinder 130. A piston assembly 101 is disposed inside the first cylinder 110; the second cylinder 120 is disposed outside the first cylinder 110, forming a first fluid channel L1 between the second and third cylinders; the third cylinder 130 is disposed outside the second cylinder 120, forming a second fluid channel L2 between the third and third cylinders. The second cylinder 120 serves as the cylinder with the opening described above in the one-way valve 10.

[0078] In the vibration damper provided in at least one embodiment of this disclosure, the sealing of the cylinder opening is achieved by utilizing a fitting portion surrounding the cylinder opening in conjunction with a sealing portion covering the cylinder opening. The cylinder opening is also opened under the pressure of fluid flowing from the second fluid channel L2 to the first fluid channel L1, achieving unidirectional fluid flow control. The fitting portion of the seal surrounds the cylinder opening and directly adheres to the inner wall of the second cylinder. The size and coverage of the seal can be made larger, eliminating the need for a support near the cylinder opening to fix the seal. This greatly simplifies the structure of the vibration damper, reduces the types and number of components, and makes processing and installation easier. Furthermore, the one-way valve has higher operational reliability. In terms of the vibration damper's performance, this design makes it easier for the high-pressure fluid in the second fluid channel L2 to deform the seal and open the cylinder opening. During the process of the high-pressure fluid in the first fluid channel L1 sealing the cylinder opening, the fitting portion surrounding the cylinder opening can seal it more tightly. Therefore, the vibration damper has higher operational reliability and stability.

[0079] Figure 12 and Figure 13This is a schematic diagram of the cross-section of the vibration damper 500 at two different locations. Figure 12 and Figure 14 The outer edge portion 222 of the seal 2 of the one-way valve 10 installed in the shock absorber 500 and the fastener 31 connected to the outer edge portion 222 are shown. Figure 13 and Figure 15 The seal 2 and the cylinder opening 12 are shown.

[0080] For example, refer to Figure 15 The surface of the seal 2 facing the second cylinder 120 is in contact with the inner wall of the second cylinder 120, and the surface of the seal 2 facing the first cylinder 110 is spaced apart from the first cylinder 110. At each position, the spacing between the surface of the seal 2 facing the first cylinder 110 and the first cylinder 110 is basically equal. That is, the entire seal 2 is basically evenly and flatly attached to the inner surface of the second cylinder 120 facing the first cylinder 110, which is conducive to achieving the above-mentioned higher working reliability and stability.

[0081] For example, refer to Figure 11 The shock absorber 500 includes a compression valve F1 and a recovery valve F2, and a second cylinder 120 and a third cylinder 130 are connected to the compression valve F1 and the recovery valve F2. (Reference) Figure 12 During the compression action of the piston assembly 101, the piston rod 102 and the piston assembly 101 move in... Figure 12 When the piston moves to the left, the compression valve F1 opens. Fluid with a tendency to flow from the second fluid channel L2 to the first fluid channel L1 applies pressure to the seal 2, allowing fluid to flow from the second fluid channel L2 to the first fluid channel L1. The flow rate through the one-way valve 10, including the seal 2, can be adjusted by specific design parameters to regulate the damping of the fluid. During the piston assembly 101's return action, the piston rod 102 and the piston assembly 101... Figure 12 When the fluid moves to the right, the recovery valve F2 opens, and the fluid, which tends to flow from the first fluid channel L1 to the second fluid channel L2, applies pressure to the seal 2 from the first fluid channel L1 to the second fluid channel L2. The seal 2 then closes, preventing the fluid from flowing from the first fluid channel L1 to the second fluid channel L2.

[0082] The following points also need to be explained:

[0083] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0084] (2) For clarity, the thickness of layers or regions in the drawings used to describe embodiments of the present disclosure is enlarged or reduced, i.e., these drawings are not drawn to actual scale.

[0085] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0086] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A one-way valve, comprising: A cylindrical body, including a cylindrical body wall and a cylindrical body opening penetrating the cylindrical body wall; as well as A sealing element is located inside the cylinder and includes a sealing portion covering the opening of the cylinder and a fitting portion surrounding the opening of the cylinder; The seal is configured to open the cylinder opening under the pressure of a fluid applied from the outside of the cylinder to the inside of the cylinder, and to seal the cylinder opening under the pressure of a fluid applied from the inside of the cylinder to the outside of the cylinder. The bonding part is bonded to the inner surface of the cylinder wall; The fitting portion surrounds the entire opening of the cylindrical body; The fitting portion includes an inner edge portion that surrounds and is adjacent to the edge of the cylinder opening, the inner edge portion surrounding the entire edge of the cylinder opening; When the opening of the cylinder is sealed, the inner edge portion is attached to the inner surface of the cylinder wall; The one-way valve also includes: A fixing structure, wherein the fitting portion further includes an outer edge portion surrounding the inner edge portion, the fixing structure being configured to fix the outer edge portion of the fitting portion of the seal to the cylinder wall; The fixing structure is spaced apart from the opening of the cylinder by a first distance along the circumference of the cylinder, and the first distance is greater than the radial dimension of the opening of the cylinder; The fixing structure includes a fixing member and a first fixing hole penetrating the fitting part. The fixing member passes through the first fixing hole and is fixedly connected to the cylinder wall. The diameter of the first fixing hole is larger than the radial dimension of the fixing member; At the location of the fixing structure, there is a gap between the outer edge of the fitting part and the inner surface of the cylinder wall; when the fluid on the outside of the cylinder applies pressure to the seal, the seal undergoes elastic deformation. During this process, the gap gradually decreases, so that the sealing part covering the opening of the cylinder is recessed toward the inside of the cylinder.

2. The one-way valve according to claim 1, wherein, The area of ​​the bonding portion is larger than the opening area of ​​the cylinder opening.

3. The one-way valve according to claim 1, wherein, In the region of the cylindrical wall surrounding the edge of the cylindrical opening and immediately adjacent to the edge of the cylindrical opening, no other structure other than the fitting portion is provided.

4. The one-way valve according to claim 1, wherein, The one-way valve includes a plurality of cylinder openings, wherein the first distance is greater than the circumferential distance between adjacent cylinder openings.

5. The one-way valve according to claim 1, wherein, The cylinder also includes a second fixing hole that penetrates the cylinder wall, and the fixing member penetrates the second fixing hole and the first fixing hole.

6. The one-way valve according to claim 1, wherein, The fastener is a protrusion that extends outward from the inner side of the cylinder wall and passes through the first fixing hole.

7. The one-way valve according to claim 1, wherein, The sealing element is a one-piece structure that is integrally molded, and can be either a closed ring or an open ring.

8. The one-way valve according to claim 1, wherein, The one-way valve includes a plurality of cylindrical openings, and the sealing element includes a plurality of sub-parts corresponding to the plurality of cylindrical openings, each sub-part including the sealing part and the fitting part; The plurality of sub-parts are spaced apart from each other, or adjacent sub-parts are connected to each other.

9. The check valve according to claim 7 or 8, wherein, The cylindrical opening includes a plurality of opening units spaced apart from each other, and each opening unit includes a plurality of sub-openings close to each other; When the seal is a one-piece structure integrally formed, the seal covers the plurality of opening units; In the case where the seal includes a plurality of sub-parts corresponding to a plurality of the cylindrical openings, each of the sub-parts covers a plurality of sub-openings in one of the opening units, and the fixing structure is located at the edge of each of the sub-parts.

10. The check valve according to any one of claims 1-8, wherein, The seal is a sheet-like elastic element.

11. A vibration damper, comprising: The check valve according to any one of claims 1-10; The first cylinder has a piston assembly installed inside; The second cylinder is disposed outside the first cylinder, forming a first fluid channel between them. The third cylinder is disposed outside the second cylinder, forming a second fluid channel between them. The second cylinder serves as the cylinder of the one-way valve.

12. The vibration damper according to claim 11, wherein, The face of the seal facing the second cylinder is in contact with the inner wall of the second cylinder, and the face of the seal facing the first cylinder is spaced apart from the first cylinder. At each position, the distance between the face of the seal facing the first cylinder and the first cylinder is substantially equal.

13. The vibration damper according to claim 11, comprising a compression valve and a recovery valve, wherein, The second cylinder is connected to the compression valve and the recovery valve; When the piston assembly performs a compression action, the compression valve opens, and the fluid with a tendency to flow from the second fluid channel to the first fluid channel applies pressure to the seal from the second fluid channel to the first fluid channel, causing the seal to open. When the piston assembly performs its return action, the return valve opens, and fluid with a tendency to flow from the first fluid channel to the second fluid channel applies pressure to the seal from the first fluid channel to the second fluid channel, causing the seal to close.

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