Pressure retaining valve, suspension assembly and vehicle

Abstract

The utility model relates to a pressure retaining valve, a suspension assembly and a vehicle. A sealing part is arranged in the pressure retaining valve, a gap is formed between the sealing part and a valve seat when the sealing part is in a first state, and an air hole is sealed when the sealing part is in a second state, so that a second air channel is communicated with or not communicated with the air hole, and opening and closing of the pressure retaining valve are achieved; compared with the technical scheme that the shape of a flow channel in the pressure retaining valve needs to be designed to limit a valve element in the pressure retaining valve in the related technology, the movement of the sealing piece in the pressure retaining valve is not limited by the shape of the first air channel or the second air channel, and therefore the shape of the first air channel and the shape of the second air channel are not limited in the pressure retaining valve; the first air channel and the second air channel do not need to be limited and reduced in size like a flow channel in a pressure retaining valve in the related technology, so that the resistance of a fluid path in the pressure retaining valve can be reduced, and the gas passing amount of the pressure retaining valve is increased.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a pressure-maintaining valve, a suspension assembly, and a vehicle. Background Art

[0002] Pressure maintaining valves are usually used in air suspension systems. The main reason is to maintain the residual pressure and limit pressure in the suspension system, thereby ensuring the reliability and safety of the suspension system.

[0003] The pressure-maintaining valve in the related technology is provided with multiple channels of different sizes and interconnected inside the valve body, so as to cooperate with the spring to limit the valve core within the valve body. When the pressure-maintaining valve is opened, it is necessary to use external components to overcome the resistance of the spring and the pressure inside the pressure-maintaining valve to passively push open the valve core inside the pressure-maintaining valve, so that the air shock absorber can be connected to the external environment through the pressure-maintaining valve. However, some of the internal channels of the pressure-maintaining valve of this structure are too small, resulting in a large resistance to the fluid path inside the pressure-maintaining valve, which in turn makes the gas flow rate of the pressure-maintaining valve of this structure small. Utility Model Content

[0004] The embodiments of the present application provide a pressure-maintaining valve, a suspension assembly, and a vehicle, aiming to solve the technical problem in related technologies that the pressure-maintaining valve has a large internal fluid path resistance due to its structural setting, thereby resulting in a small gas flow rate through the pressure-maintaining valve of this structure.

[0005] In order to achieve the above-mentioned object, according to a first aspect of the present application, a pressure-maintaining valve is provided, comprising:

[0006] The valve seat is provided with a first air passage and an air hole, wherein the air hole and the first air passage extend along a first direction and are interconnected;

[0007] a first valve body fixed on the valve seat, and provided with a second air passage extending along a first direction;

[0008] The sealing assembly includes a sealing member, the sealing member is arranged between the valve seat and the first valve body and is arranged opposite to the air hole, and the sealing member has a first state and a second state;

[0009] Among them, when the atmospheric pressure in the first air channel is greater than the first threshold value or the atmospheric pressure in the second air channel is greater than the second threshold value, the sealing member is in the first state and there is a gap between it and the valve seat, and the air hole is connected to the second air channel. When the atmospheric pressure in the first air channel is not greater than the first threshold value and the atmospheric pressure in the second air channel is not greater than the second threshold value, the sealing member is in the second state and covers the air hole, and the air hole is separated from the second air channel.

[0010] Optionally, the valve seat includes a valve seat body, and the first valve body is arranged on one side of the valve seat body in the first direction;

[0011] The valve seat body includes:

[0012] The main body, the air holes are correspondingly arranged on the main body;

[0013] The first convex portion and the second convex portion are both connected to the main body and are arranged on a side of the main body facing the first valve body in the first direction. The first convex portion and the second convex portion are spaced apart to form a third air channel, and the first convex portion encloses a fourth air channel.

[0014] When the seal is in the first state, there is a gap between the seal and the first convex portion, and the third air channel is connected with the fourth air channel; when the seal is in the second state, it abuts against the second convex portion, and the third air channel is spaced from the fourth air channel.

[0015] Optionally, it further includes a support member, the support member abuts against the main body and is located in the fourth airway;

[0016] Wherein, at least part of the sealing member is located between the second protrusion and the first valve body and between the support member and the first valve body.

[0017] Optionally, the seal comprises:

[0018] a sealing portion, the sealing portion and the first protrusion being arranged opposite to each other in a first direction;

[0019] The first fixing portion and the second fixing portion are respectively connected to the sealing portion. The first fixing portion is arranged between the support member and the first valve body, and the second fixing portion is arranged between the second convex portion and the first valve body.

[0020] Optionally, a dimension of the first fixing portion in the first direction is greater than a dimension of the sealing portion in the first direction;

[0021] At least one of the support member and the first valve body is provided with a first avoidance groove, and the first avoidance groove is configured to limit the first fixing portion.

[0022] Optionally, a dimension of the second fixing portion in the first direction is greater than a dimension of the sealing portion in the first direction;

[0023] At least one of the second protrusion and the first valve body is provided with a second avoidance groove, and the second avoidance groove is configured to limit the second fixing portion.

[0024] Optionally, the sealing assembly further comprises an elastic member, which is disposed between the first valve body and the sealing element;

[0025] The sealing member has elasticity, one end of the elastic member in the first direction abuts against the sealing member, and the sealing member can abut against the first protrusion.

[0026] Optionally, the second protrusion has a height difference with the first protrusion in the first direction.

[0027] Optionally, a height difference between the second convex portion and the first convex portion in the first direction is defined as H; wherein H satisfies: 0.25 mm≤H≤0.45 mm.

[0028] Optionally, a first mounting groove is provided on a side of the first valve body close to the main body in the first direction;

[0029] The elastic member includes:

[0030] a sleeve movably disposed in the first mounting groove along a first direction, the sleeve including an abutting end in contact with the sealing member; and

[0031] The elastic member is arranged in the sleeve, and two ends of the elastic member in the first direction are respectively connected to the first valve body and the sleeve.

[0032] Optionally, a fifth air channel connected to the second air channel is provided on the support member, and a through hole connected to the fifth air channel is provided on the peripheral side of the support member, and the through hole is connected to the fourth air channel.

[0033] Optionally, at least a portion of the support member extends into the second air channel, and the fifth air channel extends into the second air channel.

[0034] Optionally, the valve seat further comprises a second valve body, and the second valve body is arranged on a side of the valve seat body facing away from the first valve body in the first direction;

[0035] The first air channel is correspondingly arranged on the second valve body.

[0036] Optionally, the valve seat body further comprises a hollow cylindrical portion, the main body portion is arranged in the cylindrical portion and connected to or abuts against the cylindrical portion;

[0037] Among them, a second installation groove and a third installation groove spaced apart from each other are formed between the two side walls of the main body in the first direction and the side walls of the cylinder. The first valve body is fixed in the second installation groove, and the second valve body is fixed in the third installation groove.

[0038] Optionally, the valve seat body, the first valve body and the second valve body are made of nylon and / or polyphenylene sulfide.

[0039] Optionally, a clamping groove is provided on the peripheral side of the first valve body, and the first valve body is connected to the air shock absorber through the clamping groove.

[0040] Optionally, the card slot includes:

[0041] a first slot section extending along a first direction;

[0042] A second groove section is spaced apart from the first groove section in the circumferential direction of the first valve body; and

[0043] a third slot section, located between the first slot section and the second slot section and communicating with the first slot section and the second slot section;

[0044] The dimension of the third slot segment in the first direction is smaller than the dimension of the second slot segment in the first direction.

[0045] According to a second aspect of the present application, a suspension assembly is provided, comprising:

[0046] pressure-maintaining valve; and

[0047] An air shock absorber is connected to the first valve body on the pressure maintaining valve.

[0048] According to a third aspect of the present application, a vehicle is also provided, comprising a suspension assembly.

[0049] In the pressure-maintaining valve of the embodiment of the present application, a sealing member is provided in the pressure-maintaining valve, and a gap is formed between the sealing member and the valve seat in the first state, and the sealing member seals the air hole in the second state, so that the second air channel can be connected or disconnected with the air hole to realize the switching of the pressure-maintaining valve. Compared with the technical solution in the related art that requires designing the shape of the flow channel in the pressure-maintaining valve to limit the valve core in the pressure-maintaining valve, the movement of the sealing member in the pressure-maintaining valve of the present application is not restricted by the shape of the first air channel or the second air channel. Therefore, the shape of the first air channel and the second air channel is not restricted in the present application, and the first air channel and the second air channel do not need to be limited in size like the flow channel in the pressure-maintaining valve in the related art, thereby reducing the resistance of the fluid path inside the pressure-maintaining valve to increase the gas flow rate of the pressure-maintaining valve.

[0050] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0052] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0053] Figure 1 is a schematic diagram of the three-dimensional structure of a pressure-maintaining valve provided in an exemplary embodiment of the present application;

[0054] Figure 2 is a schematic structural diagram of a pressure-maintaining valve provided in an exemplary embodiment of the present application;

[0055] Figure 3 is a schematic cross-sectional structural diagram of a pressure-maintaining valve provided in an exemplary embodiment of the present application;

[0056] Figure 4 is a schematic diagram of a three-dimensional structure of a valve seat body provided in an exemplary embodiment of the present application from one perspective;

[0057] Figure 5 is a schematic diagram of the three-dimensional structure of the valve seat body provided in an exemplary embodiment of the present application from another perspective;

[0058] Figure 6 is a schematic cross-sectional structural diagram of a valve seat body provided in an exemplary embodiment of the present application;

[0059] Figure 7 is a schematic diagram of the three-dimensional structure of a sealing member provided in an exemplary embodiment of the present application;

[0060] Figure 8 is a schematic cross-sectional structural diagram of a sealing member provided in an exemplary embodiment of the present application;

[0061] Figure 9 is a schematic cross-sectional structural diagram of a sleeve provided in an exemplary embodiment of the present application;

[0062] Figure 10 is a schematic cross-sectional structural diagram of a first valve body provided in an exemplary embodiment of the present application;

[0063] Figure 11 is a schematic diagram of the three-dimensional structure of a support member provided in an exemplary embodiment of the present application;

[0064] Figure 12 is a schematic cross-sectional structural diagram of a support member provided in an exemplary embodiment of the present application;

[0065] Figure 13 is a schematic diagram of the three-dimensional structure of the second valve body provided in an exemplary embodiment of the present application;

[0066] Figure 14 2 is a schematic cross-sectional structural diagram of a second valve body provided in an exemplary embodiment of the present application.

[0067] Description of reference numerals:

[0068] 1. Valve seat; 11. Valve seat body; 111. Main body; 112. First convex portion; 113. Second convex portion; 114. Cylinder; 12. Second valve body; 2. First air channel; 3. Air hole; 4. First valve body; 5. Second air channel; 6. Sealing assembly; 61. Sealing member; 611. Sealing portion; 612. First fixing portion; 613. Second fixing portion; 62. Elastic member; 621. Sleeve; 620. Abutment end; 622. Elastic member; 7. Third air channel; 8. Fourth air channel; 9. Support member; 10. An avoidance groove; 13. A second avoidance groove; 14. A first mounting groove; 15. A second mounting groove; 16. A third mounting groove; 17. A card slot; 171. A first slot section; 172. A second slot section; 173. A third slot section; 18. A fifth air duct; 19. A through hole; 20. A fourth mounting groove; 21. A sealing ring; 22. A first pressure relief hole; 23. A second pressure relief hole; 24. A fifth mounting groove; 25. A first side wall; 26. A second side wall; 27. A third side wall; 28. A glue reduction groove; 29. ​​A fourth side wall; 30. A fifth side wall. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0070] This application proposes a pressure maintaining valve. Figures 1 to 14 These are some embodiments of the present application.

[0071] See also Figures 1 to 3 In some embodiments of the present application, the pressure-maintaining valve includes a valve seat 1 and a first valve body 4, and the valve seat 1 and the first valve body 4 are interconnected in a first direction X to constitute the main structural part of the pressure-maintaining valve; wherein the first direction X is the axial direction of the pressure-maintaining valve.

[0072] The valve seat 1 is provided with a first air channel 2 and an air hole 3 which are interconnected, and a second air channel 5 is provided on the first valve body 4. When the pressure-maintaining valve is opened, the air hole 3 is connected with the second air channel 5 to realize the connection between the first air channel 2, the air hole 3 and the second air channel 5, so that the air shock absorber can be charged and discharged through the pressure-maintaining valve.

[0073] The pressure-maintaining valve also includes a sealing assembly 6, which includes a sealing member 61. The sealing member 61 is arranged between the valve seat 1 and the first valve body 4 and is arranged opposite to the air hole 3. The sealing member 61 has a first state and a second state; that is, there is a gap between the sealing member 61 and the air hole 3 in the first state, and can seal the air hole 3 in the second state so that the second air channel 5 is connected to or disconnected from the air hole 3.

[0074] When the atmospheric pressure in the first air channel 2 is greater than the first threshold value or the atmospheric pressure in the second air channel 5 is greater than the second threshold value, the sealing member 61 is in the first state and has a gap with the valve seat 1 so that the air hole 3 is connected with the second air channel 5. When the atmospheric pressure in the first air channel 2 is not greater than the first threshold value and the atmospheric pressure in the second air channel 5 is not greater than the second threshold value, the sealing member 61 is in the second state and covers the air hole 3 so that the air hole 3 is separated from the second air channel 5.

[0075] In the technical solution of the present application, a seal 61 is provided in the pressure-maintaining valve, and there is a gap between the seal 61 and the valve seat 1 in the first state. The seal 61 seals the air hole 3 in the second state, so that the second air channel 5 can be connected or disconnected with the air hole 3 to realize the switching of the pressure-maintaining valve. Compared with the technical solution in the related art that requires designing the shape of the flow channel in the pressure-maintaining valve to limit the valve core in the pressure-maintaining valve, the movement of the seal 61 in the pressure-maintaining valve of the present application is not restricted by the shape of the first air channel 2 or the second air channel 5. Therefore, in the present application, there is no restriction on the shape of the first air channel 2 and the second air channel 5. The first air channel 2 and the second air channel 5 do not need to be limited in size like the flow channel in the pressure-maintaining valve in the related art, thereby reducing the resistance of the fluid path inside the pressure-maintaining valve to increase the gas flow rate of the pressure-maintaining valve.

[0076] In some embodiments of the present application, the first valve body 4 is connected to the air shock absorber. When the atmospheric pressure in the first air duct 2 is not greater than the first threshold value and the atmospheric pressure in the second air duct 5 is not greater than the second threshold value, the seal 61 is in the second state and the pressure maintaining valve is closed, and the gas in the air shock absorber is in a sealed environment; when the atmospheric pressure in the first air duct 2 is greater than the first threshold value, the seal 61 is in the first state and the pressure maintaining valve is open, and the air shock absorber can realize inflation operation through the pressure maintaining valve; when the atmospheric pressure in the second air duct 5 is greater than the second threshold value, the seal 61 is in the second state and the pressure maintaining valve is open, and the air shock absorber can realize deflation operation through the pressure maintaining valve.

[0077] The first threshold value may be equal to or different from the second threshold value; the numerical ranges of the first threshold value and the second threshold value may be set according to the design requirements of the air inlet and outlet of the air shock absorber.

[0078] It should be noted that there is no limitation on the form in which the seal 61 seals the pore 3. In one embodiment, the seal 61 may directly cover the periphery of the pore 3 to achieve the spacing between the pore 3 and the second air duct 5; in another embodiment, the seal 61 may separate the air duct connected to the pore 3 and the second air duct 5 to achieve the spacing between the pore 3 and the second air duct 5.

[0079] In some embodiments of the present application, the air hole 3 and the first air channel 2 are interconnected in the first direction X, so that the gas flow between the air hole 3 and the first air channel 2 will not be obstructed due to the structural design of the pressure maintaining valve, thereby improving the smoothness of the gas flow in the pressure maintaining valve.

[0080] See also Figures 4 to 6 In some embodiments of the present application, the valve seat 1 includes a valve seat body 11, which includes a main body 111, a first convex portion 112, and a second convex portion 113. The air holes 3 are correspondingly arranged on the main body 111. The first convex portion 112 and the second convex portion 113 are both connected to the main body 111 and are arranged on one side of the main body 111 facing the first valve body 4 in the first direction X. The first convex portion 112 and the second convex portion 113 are spaced apart to form a third air channel 7, and the first convex portion 112 encloses a fourth air channel 8; wherein, the sealing member When the sealing member 61 is in the first state, there is a gap between it and the first protrusion 112, so that the third air channel 7 and the fourth air channel 8 are connected; when the sealing member 61 is in the second state, it abuts against the second protrusion 113, so that the third air channel 7 and the fourth air channel 8 are separated; in this embodiment, the main body 111, the first protrusion 112 and the second protrusion 113 are integrally formed, so that the third air channel 7, the fourth air channel 8 and the air hole 3 are all formed on the same component and the third air channel 7 remains connected with the air hole 3, thereby reducing the internal components of the pressure maintaining valve.

[0081] Among them, the number of air holes 3 located on the main body 111 is not limited and can be one or more; in order to reduce the resistance of the internal fluid path of the pressure maintaining valve, in one embodiment of the present application, the number of air holes 3 located on the main body is set to six.

[0082] In addition, in one embodiment of the present application, the material of the valve seat body 11 is plastic. By designing the material of the valve seat body 11 to be plastic, the weight of the pressure-maintaining valve can be effectively reduced; accordingly, the material of the first protrusion 112 is also plastic. Since the seal 61 continuously abuts against the first protrusion 112 when switching between the first state and the second state, when the material of the first protrusion 112 is plastic, the impact force and thermal impact of the first protrusion 112 on the seal 61 can be effectively reduced, thereby ensuring the long-term use accuracy and life of the pressure-maintaining valve.

[0083] A plurality of glue reducing grooves 28 are also provided on the main body 111. The design of the glue reducing grooves 28 can reduce the amount of material used on the main body 111 to reduce the weight of the valve seat body 11 and prevent the valve seat body 11 from shrinking during the cooling process, thereby improving the quality and consistency of the valve seat body 11.

[0084] In some embodiments of the present application, the first protrusion 112 and the second protrusion 113 are both arranged in a ring shape.

[0085] In some embodiments of the present application, the pressure-maintaining valve further comprises a support member 9, which abuts against the main body 111 and is located in the fourth air channel 8; wherein, at least part of the sealing member 61 is located between the second protrusion 113 and the first valve body 4 and between the support member 9 and the first valve body 4; that is, in this embodiment, the sealing member 61 is fixed by abutting against each other in the first direction X between the first valve body 4 and the support member 9, and between the first valve body 4 and the second protrusion 113; and since the first protrusion 112 is located between the second protrusion 113 and the support member 9, the sealing member 61 also covers the first protrusion 112 in the first direction X, and the part of the sealing member 61 opposite to the first protrusion 112 in the first direction X abuts against the first protrusion 112 or has a gap with the first protrusion 112, so as to achieve spacing and communication between the third air channel 7 and the fourth air channel 8.

[0086] See also Figures 7 and 8 In some embodiments of the present application, the sealing member 61 includes a sealing portion 611, a first fixing portion 612 and a second fixing portion 613. The sealing portion 611 and the first protrusion 112 are arranged opposite to each other in the first direction X; the first fixing portion 612 and the second fixing portion 613 are respectively connected to the sealing portion 611, the first fixing portion 612 is arranged between the support member 9 and the first valve body 4, and the second fixing portion 613 is arranged between the second protrusion 113 and the first valve body 4; that is, in this embodiment, the sealing portion 611 is limited between the first valve body 4 and the valve seat body 11 by the first fixing portion 612 and the second fixing portion.

[0087] In addition, to ensure that the sealing portion 611 is firmly fixed between the first valve body 4 and the valve seat body 11, at least a portion of the first fixing portion 612 is interference fit with the support member 9 and the first valve body 4, and at least a portion of the second fixing portion 613 is interference fit with the second protrusion 113 and the first valve body 4, to ensure that the sealing portion 61 is firmly fixed between the first valve body 4 and the valve seat body 11.

[0088] Among them, when the seal 61 is in the first state and the second state, the relative position relationship between the sealing portion 611 and the first protrusion 112 in the first direction X is different, that is, when the seal 61 switches between the first state and the second state, the sealing portion 611 can move in the first direction X.

[0089] In some embodiments of the present application, the dimension of the first fixing portion 612 in the first direction X is greater than the dimension of the sealing portion 611 in the first direction X, and at least one of the support member 9 and the first valve body 4 is provided with a first avoidance groove 10, and the first avoidance groove 10 is configured to limit the first fixing portion 612; the first fixing portion 612 is limited by the first avoidance groove 10, and in the radial direction of the pressure maintaining valve, the first fixing portion 612 abuts against the groove wall of the first avoidance groove 10, thereby preventing the first fixing portion 612 from falling out of the first avoidance groove 10 on the basis of the mutual abutment between the support member 9 and the first valve body 4 in the first direction X, so as to ensure that the sealing member 61 is firmly fixed between the support member 9 and the first valve body 4.

[0090] It can be understood that in one embodiment of the present application, a first avoidance groove 10 may be provided on the support member 9; in another embodiment of the present application, a first avoidance groove 10 may be provided on the first valve body 4; in another embodiment of the present application, a first avoidance groove 10 may be provided on both the support member 9 and the first valve body 4.

[0091] In some embodiments of the present application, the size of the second fixing portion 613 in the first direction X is larger than the size of the sealing portion 611 in the first direction X, and a second avoidance groove 13 is provided between the second protrusion 113 and at least one of the first valve body 4, and the second avoidance groove 13 is configured to limit the second fixing portion 613; the second avoidance groove 13 limits the second fixing portion 613, and in the radial direction of the pressure maintaining valve, the second fixing portion 613 abuts against the groove wall of the second avoidance groove 13, thereby preventing the second fixing portion 613 from falling out of the second avoidance groove 13 on the basis of the mutual abutment between the second protrusion 113 and the first valve body 4 in the first direction X, so as to ensure that the sealing member 61 is firmly fixed between the second protrusion 113 and the first valve body 4.

[0092] It can be understood that in one embodiment of the present application, a second avoidance groove 13 may be provided on the second protrusion 113; in another embodiment of the present application, a first avoidance groove 10 may be provided on the first valve body 4; in another embodiment of the present application, a second avoidance groove 13 may be provided on both the second protrusion 113 and the first valve body 4.

[0093] In one embodiment of the present application, the seal 61 is arranged in a ring shape, the first fixing portion 612 is located on the inner side of the seal 61, and the second fixing portion 613 is located on the outer side of the seal 61. Since the inner and outer sides of the seal 61 are firmly fixed, it can be ensured that the gas in the third air duct 7 and the gas in the fourth air duct 8 will not leak.

[0094] In some embodiments of the present application, the sealing assembly 6 further includes an elastic member 62, which is disposed between the first valve body 4 and the sealing member 61; the sealing member 61 is elastic, and one end of the elastic member 62 in the first direction X abuts against the sealing member 61, and the sealing member 61 may abut against the first protrusion 112. That is, in this embodiment, when the gas pressure in the first air channel 2 or the second air channel 5 breaks through the elastic resistance of the elastic member 62, the sealing member 61 is in a first state and a gap is formed between the sealing member 61 and the first protrusion 112, so that the third air channel 7 and the fourth air channel 8 are connected; when the gas pressure in the first air channel 2 or the second air channel 5 is insufficient to break through the elastic resistance of the elastic member 62, the sealing member 61 is in a second state and abuts against the first protrusion 112, so that the third air channel 7 and the fourth air channel 8 are separated.

[0095] In one embodiment of the present application, a height difference is formed between the second protrusion 113 and the first protrusion 112 in the first direction X; that is, in this embodiment, the height difference is formed between the first protrusion 112 and the second protrusion 113, so that the seal 61 is always in a tensioned state, ensuring a good sealing effect of the seal 61 while also accurately controlling the air pressure required to open the pressure-maintaining valve. If there is no height difference between the first protrusion 112 and the second protrusion 113, when the elastic member 62 abuts the seal 61 against the first protrusion 112, the seal 61 may be in a relaxed state, and the part of the seal 61 not supported by the first protrusion 112 and the second protrusion 113 may be deformed and wrinkled, thereby affecting the sealing effect of the seal 61, and thus also affecting the response speed of the pressure-maintaining valve.

[0096] In some embodiments of the present application, the height difference between the second protrusion 113 and the first protrusion 112 in the first direction X is defined as H; wherein H satisfies: 0.25mm≤H≤0.45mm; in this embodiment, H is designed to satisfy this interval range so that the seal 61 is in a tensioned state, which can ensure a good sealing effect of the seal 61 while also accurately controlling the air pressure required to open the pressure-maintaining valve; if H is less than 0.25mm, the seal 61 may be in a relaxed state, and the unsupported part of the seal 61 may be deformed and wrinkled, thereby affecting the sealing effect of the seal 61, and thus also affecting the response speed of the pressure-maintaining valve; if H is greater than 0.45mm, the seal 61 may be over-tensioned, causing the seal 61 to deform, thereby affecting the sealing effect of the seal 61.

[0097] In some embodiments of the present application, a first mounting groove 14 is provided on a side of the first valve body 4 proximate to the main body 111 in the first direction X. The elastic member 62 includes a sleeve 621 and an elastic member 622. The sleeve 621 is movably disposed within the first mounting groove 14 along the first direction X. The elastic member 622 is elastically deformable in the first direction X and disposed within the sleeve 621. The ends of the elastic member 622 in the first direction X are respectively connected to or abutted against the first valve body 4 and the sleeve 621. The first mounting groove 14 provides installation space for the sleeve 621, thereby effectively utilizing the internal space of the protective valve.

[0098] Among them, the elastic member 622 is located between the first valve body 4 and the sleeve 621 and is limited so that the elastic member 622 can move against the sleeve 621; and the connection method between the elastic member 622 and the first valve body 4 and the sleeve 621 is not limited. The elastic member 622 can be arranged between the first valve body 4 and the sleeve 621, and at this time, there is no fixed connection relationship between the elastic member 622 and the first valve body 4 and the sleeve 621; or at least one end of the elastic member 622 can be connected to the first valve body 4 and the sleeve 621, and at this time, the elastic member 622 has a fixed connection relationship with at least one of the first valve body 4 and the sleeve 621.

[0099] See also Figure 9 The sleeve 621 includes an abutting end 620 , and the abutting end 620 contacts the sealing member 61 to abut against the sealing member 61 .

[0100] In addition, the outer periphery of the sleeve 621 is in contact with the wall of the first installation groove 14 , so that the first installation groove 14 restricts the sleeve 621 from moving only along the first direction X.

[0101] It should be supplemented that the design of the first avoidance groove 10 and the second avoidance groove 13 can prevent the gas in the third air channel 7 and the fourth air channel 8 from entering the first installation groove 14 .

[0102] See also Figure 10 In one embodiment of the present application, a fifth mounting groove 24 is further provided at the bottom end of the first mounting groove 14 , and the fifth mounting groove 24 limits one end of the elastic member 622 , and the elastic member 622 can drive the sleeve 621 to move along the extension direction of the first mounting groove 14 .

[0103] See also Figures 11 to 12 Since the sealing member 61 is arranged in a ring shape, the support member 9 is located in the middle position of the sealing member 61. To ensure that the support member 9 does not affect the connection between the second air channel 5 and the fourth air channel 8, in some embodiments of the present application, a fifth air channel 18 connected to the second air channel 5 is provided on the support member 9, and a through hole 19 connected to the fifth air channel 18 is provided on the peripheral side of the support member 9, and the through hole 19 is connected to the fourth air channel 8.

[0104] In some embodiments of the present application, at least a portion of the support member 9 extends into the second air duct 5 so that the fifth air duct 18 extends into the second air duct 5; that is, in this embodiment, gas leakage from the connection between the fifth air duct 18 and the second air duct 5 to the first mounting groove 14 can be avoided.

[0105] A sink is further provided at a position of the main body 111 corresponding to the support member 9 to limit the support member 9 , making it easier for operators or operating tools to assemble the first valve body 4 , the valve seat body 11 and the support member 9 .

[0106] In some embodiments of the present application, the valve seat 1 also includes a second valve body 12, which is arranged on the side of the valve seat body 11 away from the first valve body 4 in the first direction X; the first air channel 2 is correspondingly arranged on the second valve body 12; that is, in this embodiment, the main part of the pressure maintaining valve is composed of the first valve body 4, the second valve body 12 and the valve seat 1.

[0107] In some embodiments of the present application, the valve seat body 11 further includes a hollow cylindrical portion 114, with the main body 111 disposed within and connected to the cylindrical portion 114. A second mounting groove 15 and a third mounting groove 16 are formed between the side walls of the main body 111 in the first direction X and the side walls of the cylindrical portion 114, respectively. The first valve body 4 is secured within the second mounting groove 15, and the second valve body 12 is secured within the third mounting groove 16. The provision of the second mounting groove 15 and the third mounting groove 16 ensures sufficient overlap, thereby ensuring that the first valve body 4, the second valve body 12, and the valve seat body 11 are securely fixed.

[0108] Among them, a first pressure relief hole 22 is provided on the valve seat body 11, and a second pressure relief hole 23 is provided on the first valve body 4. The first pressure relief hole 22 and the second pressure relief hole 23 are connected, and the second pressure relief hole 23 is connected to the first mounting groove 14, so that the first mounting groove 14 is always connected to the external environment, avoiding the formation of back pressure in the first mounting groove 14 and affecting the opening of the pressure maintaining valve.

[0109] In one embodiment of the present application, the outer periphery of the first valve body 4 is provided with a first side wall 25, a second side wall 26 and a third side wall 27 whose outer diameters decrease in sequence. The second side wall 26 is used to form a transition guide when the first valve body 4 and the valve seat body 11 are interference pressed. The first side wall 25 is interference sealed with the side of the valve seat body 11, and the second pressure relief hole 23 is provided on the third side wall 26, thereby forming a pressure relief transition zone between the valve seat body 11.

[0110] See also Figures 13 and 14In some embodiments of the present application, a fourth side wall 29 for press-fitting transition with the valve seat body 11 and a fifth side wall 30 for interference sealing with the valve seat body 11 are formed on the outer side of the second valve body 12 .

[0111] In some embodiments of the present application, the valve seat body 11 , the first valve body 4 and the second valve body 12 are all made of nylon and / or polyphenylene sulfide; and the valve seat body 11 , the first valve body 4 and the second valve body 12 are all laser welded.

[0112] In some embodiments of the present application, the valve seat body 11 , the first valve body 4 and the second valve body 12 can also be made of other plastic materials with a certain rigidity, as long as the rigidity requirements of the pressure-maintaining valve are met.

[0113] Among them, the valve seat body 11, the first valve body 4 and the second valve body 12 are laser welded. To ensure that the valve seat body 11, the first valve body 4 and the second valve body 12 are firmly welded, the valve seat body 11 is made of translucent material, and the first valve body 4 and the second valve body 12 are made of opaque material.

[0114] In some embodiments of the present application, a card slot 17 is provided on the peripheral side of the first valve body 4, and the first valve body 4 is connected to the air shock absorber through the card slot 17; that is, the air shock absorber and the pressure maintaining valve are connected through the card slot 17, so that the air shock absorber and the pressure maintaining valve are easy to disassemble and assemble.

[0115] In some embodiments of the present application, the clamping groove 17 includes a first groove section 171, a second groove section 172 and a third groove section 173, the first groove section 171 extends along the first direction X; the second groove section 172 is spaced apart from the first groove section 171 in the circumferential direction of the first valve body 4; the third groove section 173 is located between the first groove section 171 and the second groove section 172 and connects the first groove section 171 and the second groove section 172; wherein the size of the third groove section 173 in the first direction X is smaller than the size of the second groove section 172 in the first direction X; that is, in this embodiment, after being fixed between the air shock absorber and the pressure maintaining valve, the clamping portion of the air shock absorber is located in the second groove section 172, thereby limiting the separation of the air shock absorber and the pressure maintaining valve.

[0116] In some embodiments of the present application, the first valve body 4 is further provided with a fourth mounting groove 20 on the lower side of the card groove 17, and a sealing ring 21 is installed in the fourth mounting groove 20 to ensure the sealing of the connection between the air shock absorber and the first valve body 4.

[0117] The present application also proposes a suspension assembly, including a pressure-maintaining valve and an air shock absorber, wherein the air shock absorber is connected to the first valve body 4 on the pressure-maintaining valve. The pressure-maintaining valve is as described above. Since the present suspension assembly adopts all the technical solutions of all the above-mentioned embodiments, it has at least the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0118] The present application also proposes a vehicle including a suspension assembly. The suspension assembly is as described above. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0119] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and this disclosure does not make any specific limitations on this.

[0120] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0121] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0122] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0123] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A pressure-maintaining valve, characterized in that: include: The valve seat is provided with a first air channel and an air hole, wherein the air hole and the first air channel extend along a first direction and are connected to each other; a first valve body fixed on the valve seat, wherein the first valve body is provided with a second air passage extending along the first direction; A sealing assembly, comprising a sealing member, the sealing member being disposed between the valve seat and the first valve body and opposite to the air hole, the sealing member having a first state and a second state; Among them, when the atmospheric pressure of the first air duct is greater than the first threshold value or the atmospheric pressure of the second air duct is greater than the second threshold value, the sealing member is in the first state and has a gap with the valve seat, and the air hole is connected to the second air duct; when the atmospheric pressure of the first air duct is not greater than the first threshold value and the atmospheric pressure of the second air duct is not greater than the second threshold value, the sealing member is in the second state and covers the air hole, and the air hole is spaced from the second air duct.

2. The pressure-maintaining valve according to claim 1, characterized in that: The valve seat comprises a valve seat body, and the first valve body is arranged on one side of the valve seat body in the first direction; The valve seat body comprises: a main body, wherein the air holes are correspondingly arranged on the main body; A first convex portion and a second convex portion are both connected to the main body and are arranged on a side of the main body facing the first valve body in the first direction, the first convex portion and the second convex portion are spaced apart to form a third air channel, and the first convex portion encloses a fourth air channel; When the seal is in the first state, there is a gap between the seal and the first protrusion, and the third air channel is connected to the fourth air channel; when the seal is in the second state, it abuts against the second protrusion, and the third air channel is separated from the fourth air channel.

3. The pressure-maintaining valve according to claim 2, characterized in that: Also included is a support member, the support member abutting against the main body and located in the fourth air passage; Wherein, at least part of the sealing member is located between the second protrusion and the first valve body and between the support member and the first valve body.

4. The pressure-maintaining valve according to claim 3, characterized in that: The sealing member comprises: a sealing portion, the sealing portion and the first protrusion being arranged opposite to each other in the first direction; The first fixing portion and the second fixing portion are respectively connected to the sealing portion. The first fixing portion is arranged between the support member and the first valve body, and the second fixing portion is arranged between the second convex portion and the first valve body.

5. The pressure-maintaining valve according to claim 4, characterized in that: The dimension of the first fixing portion in the first direction is greater than the dimension of the sealing portion in the first direction; At least one of the support member and the first valve body is provided with a first avoidance groove, and the first avoidance groove is configured to limit the first fixing portion.

6. The pressure-maintaining valve according to claim 4, characterized in that: The size of the second fixing portion in the first direction is larger than the size of the sealing portion in the first direction; At least one of the second protrusion and the first valve body is provided with a second avoidance groove, and the second avoidance groove is configured to limit the second fixing portion.

7. The pressure-maintaining valve according to claim 3, characterized in that: The sealing assembly further includes an elastic member disposed between the first valve body and the sealing member; The sealing member has elasticity, one end of the elastic member in the first direction abuts against the sealing member, and the sealing member can abut against the first protrusion.

8. The pressure-maintaining valve according to claim 7, characterized in that: The second convex portion has a height difference with the first convex portion in the first direction.

9. The pressure-maintaining valve according to claim 8, characterized in that: The height difference between the second convex portion and the first convex portion in the first direction is defined as H; wherein H satisfies: 0.25 mm ≤ H ≤ 0.45 mm.

10. The pressure-maintaining valve according to claim 7, characterized in that: A first mounting groove is provided on one side of the first valve body close to the main body in the first direction; The elastic member comprises: a sleeve movably disposed in the first mounting groove along the first direction, the sleeve comprising an abutting end, the abutting end being in contact with the sealing member; and An elastic member is disposed in the sleeve, and two ends of the elastic member in the first direction are respectively connected to or abutted against the first valve body and the sleeve.

11. The pressure-maintaining valve according to claim 3, characterized in that: The support member is provided with a fifth air channel connected to the second air channel, and a through hole connected to the fifth air channel is provided on a peripheral side of the support member, and the through hole is connected to the fourth air channel.

12. The pressure-maintaining valve according to claim 11, characterized in that: At least a portion of the support member extends into the second air channel, and the fifth air channel extends into the second air channel.

13. The pressure-maintaining valve according to claim 2, wherein: The valve seat further includes a second valve body, which is arranged on a side of the valve seat body away from the first valve body in the first direction; The first air channel is correspondingly arranged on the second valve body.

14. The pressure-maintaining valve according to claim 13, characterized in that: The valve seat body further comprises a hollow cylindrical portion, wherein the main body is disposed in the cylindrical portion and connected to the cylindrical portion; Among them, a second installation groove and a third installation groove spaced apart from each other are formed between the two side walls of the main body in the first direction and the side walls of the cylinder, the first valve body is fixed in the second installation groove, and the second valve body is fixed in the third installation groove.

15. The pressure-maintaining valve according to claim 14, characterized in that: The valve seat body, the first valve body and the second valve body are made of nylon and / or polyphenylene sulfide.

16. The pressure-maintaining valve according to claim 1, wherein: A clamping groove is provided on the circumferential side of the first valve body, and the first valve body is connected to the air shock absorber through the clamping groove.

17. The pressure-maintaining valve according to claim 16, characterized in that: The card slot includes: a first slot section extending along the first direction; a second groove section, spaced apart from the first groove section in the circumferential direction of the first valve body; and a third slot section, located between the first slot section and the second slot section and communicating with the first slot section and the second slot section; The dimension of the third slot segment in the first direction is smaller than the dimension of the second slot segment in the first direction.

18. A suspension assembly, characterized in that: include: The pressure maintaining valve according to any one of claims 1 to 17; and An air shock absorber is connected to the first valve body on the pressure maintaining valve.

19. A vehicle, characterized in that: Comprising the suspension assembly as claimed in claim 18.

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