Integrated pressure retaining valve, air suspension system, and vehicle

Abstract

An integrated pressure retaining valve, an air suspension system, and a vehicle, relating to the technical field of vehicles. An integrated pressure retaining valve (1) comprises a valve housing (10), a pressure retaining assembly, and a fixing assembly. The pressure retaining assembly comprises a valve core (21), a reset member (22), and a first sealing member (23), the first sealing member is fixed on the valve core, and the reset member is connected between the valve housing and the valve core; and the fixing assembly comprises a fixing member (31). In the mounting process of the air suspension system, the integrated pressure retaining valve is connected to an air port of an air spring (4), and the reset member of the integrated pressure retaining valve applies an acting force to the valve core, such that the first sealing member seals a first end (101), and the integrated pressure retaining valve is in a pressure retaining state, thereby ensuring the pressure of gas in the air spring, and avoiding adjusting the shape of the air spring; and then when the air spring is mounted on a vehicle frame, an air guide pipe (5) is directly inserted into the integrated pressure retaining valve, and the air guide pipe is fixed by the fixing member, so that the air guide pipe can be communicated with the air port of the air spring, thereby achieving time-saving and labor-saving in the mounting process of the air suspension system.

Description

Integrated pressure maintaining valve, air suspension system and vehicle Technical Field

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

[0002] With the rapid development of electrification and intelligence in automobile chassis, the application of air suspension is becoming more and more common. Air springs utilize the compressibility of gas to achieve consistency in the natural frequency of the vehicle body. By filling or discharging the air spring to change the internal pressure, the suspension height can be adjusted to improve the ride comfort of the vehicle.

[0003] Conventional air suspension systems include a vehicle frame, an air pump, an air tank, an air duct, and an air spring. To install an air suspension system, the air spring is first shaped and then mounted on the vehicle frame. The air pump and air tank are then mounted on the frame, and the air duct is connected between the air tank and the air spring.

[0004] However, the installation of the air suspension system is time-consuming and labor-intensive.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide an integrated pressure-maintaining valve, an air suspension system, and a vehicle to solve the problem of being time-consuming and labor-intensive during the installation of the air suspension system.

[0007] In a first aspect, an embodiment of the present application provides an integrated pressure-maintaining valve for use in an air suspension system of a vehicle, wherein the air suspension system includes an air spring and an air duct, and the integrated pressure-maintaining valve includes a valve housing, a pressure-maintaining assembly, and a fixing assembly.

[0008] The valve housing has a first end and a second end that are oppositely arranged in the axial direction of the integrated pressure-maintaining valve, and the valve housing is detachably connected to the air port of the air spring;

[0009] The pressure-maintaining assembly includes a valve core, a reset member, and a first sealing member. The valve core is located in the valve housing. The first sealing member is fixed to the valve core. The reset member is connected between the valve housing and the valve core. When the integrated pressure-maintaining valve is in a pressure-maintaining state, the reset member is configured to apply a force to the valve core so that the first sealing member seals the first end.

[0010] The fixing assembly includes a fixing part, which is located at least inside the valve housing. The fixing part is constructed to be detachably connected to the air conduit when the air conduit is inserted into the integrated pressure-maintaining valve, so that the air conduit can separate the first sealing part from the first end through the valve core and connect the air conduit with the air port of the air spring.

[0011] In one possible embodiment, the valve core has a gas channel and a conducting port, the gas channel passes through an end of the valve core away from the air spring in the axial direction of the integrated pressure-maintaining valve, the conducting port is in communication with the gas channel, and the gas channel can be in communication with the air duct;

[0012] The first sealing member is clamped on the valve core, the valve housing has a sealing surface, and the first sealing member contacts the sealing surface so that the conducting port of the valve core is located on a side of the first sealing member away from the air spring.

[0013] In a possible implementation, the reset member is a spring, a first step is provided inside the valve housing, the valve core has a valve core step, and the spring abuts between the first step and the valve core step.

[0014] In a possible embodiment, a second seal is further included, and a second step is provided inside the valve housing. The second step is farther away from the air spring in the axial direction of the integrated pressure-maintaining valve than the first step. The second seal is located between the pressure-maintaining assembly and the fixed assembly in the axial direction of the integrated pressure-maintaining valve, and the second seal abuts against the second step. When the air duct is inserted into the integrated pressure-maintaining valve, the inner side of the second seal abuts against the outer wall of the air duct, and the outer side of the second seal abuts against the inner wall of the valve housing.

[0015] In a possible embodiment, the fixing member can move in the axial direction of the integrated pressure-maintaining valve, and the fixing member includes a circular ring body, multiple cantilevers and multiple fixing protrusions. The multiple cantilevers and the multiple fixing protrusions are fixedly connected to the circular ring body in sequence along the circumferential direction of the circular ring body, and adjacent two cantilevers are arranged at intervals. At least one fixing protrusion is fixed on the inner side of each cantilever, and the fixing protrusion can squeeze the air duct.

[0016] In a possible implementation, the fixing assembly further includes a clamping ring, which can be clamped on the plurality of cantilevers of the fixing member.

[0017] In a possible embodiment, the fixing member is fixed in the valve housing, and the fixing member includes a circular ring body and a plurality of cantilevers. The axis of the circular ring body is coaxially arranged with the axis of the valve core. The plurality of cantilevers are fixedly connected in sequence along the circumferential direction of the circular ring body, and adjacent two cantilevers are spaced apart. The cantilevers can squeeze the air duct.

[0018] In a possible implementation, the fixing assembly further includes a limiting ring, a fixing ring, and a disassembly sleeve. A third step and a fourth step are provided inside the valve housing. The limiting ring and the fixing ring are fixed between the third step and the fourth step. The annular body of the fixing member is clamped between the limiting ring and the fixing ring.

[0019] The disassembly sleeve is movably limited between the fixing ring and the fixing member. When the air duct is disassembled from the integrated pressure-maintaining valve, the disassembly sleeve squeezes the multiple cantilevers of the fixing member along the axial direction of the integrated pressure-maintaining valve to separate the multiple cantilevers of the fixing member from the air duct.

[0020] In a second aspect, an embodiment of the present application provides an air suspension system, comprising an air spring, an air duct, and the integrated pressure-maintaining valve as described above;

[0021] The integrated pressure maintaining valve is detachably installed between the air spring and the air duct.

[0022] In a third aspect, an embodiment of the present application provides a vehicle comprising the air suspension system as described above.

[0023] The embodiment of the present application provides an integrated pressure-maintaining valve, an air suspension system and a vehicle. During the installation of the air suspension system, the integrated pressure-maintaining valve is connected to the air port of the air spring, and the reset member of the integrated pressure-maintaining valve applies a force to the valve core, so that the first sealing member can seal the first end, and the integrated pressure-maintaining valve is in a pressure-maintaining state, thereby ensuring the internal gas pressure of the air spring, avoiding the need to adjust the shape of the air spring, and making the installation of the air spring time-saving and labor-saving. Thereafter, after the air spring is installed on the vehicle frame, the air duct is directly inserted into the integrated pressure-maintaining valve, and the air duct is fixed by the fixing member, so that the air duct and the air port of the air spring can be connected, thereby making the installation process of the air suspension system time-saving and labor-saving. In addition, when the air duct is disengaged from the integrated pressure-maintaining valve, the reset part of the integrated pressure-maintaining valve applies a force to the valve core, which can make the first sealing part seal the first end, and the integrated pressure-maintaining valve is in a pressure-maintaining state, ensuring the internal gas pressure of the air spring, thereby ensuring the driving safety of the vehicle; when testing the air tightness of the air spring, the air duct is removed, and the reset part of the integrated pressure-maintaining valve applies a force to the valve core, which can make the first sealing part seal the first end, and the integrated pressure-maintaining valve is in a pressure-maintaining state, ensuring the internal gas pressure of the air spring, thereby facilitating the testing of the air tightness of the air spring.

[0024] In addition, the integrated pressure-maintaining valve provided in the embodiment of the present application integrates the pressure-maintaining component and the fixing component on the valve housing, so that the integrated pressure-maintaining valve has pressure-maintaining and fixing functions. During the installation of the air suspension system, the integrated pressure-maintaining valve is connected to the air port of the air spring, and the integrated pressure-maintaining valve is in a pressure-maintaining state. When the air duct is directly inserted into the integrated pressure-maintaining valve, the air duct is fixed by the fixing part.

[0025] When the air duct is removed from the integrated pressure-maintaining valve, the air duct can be directly removed from the fixing part to complete the removal, thereby making the removal of the air duct simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] FIG1 is a schematic diagram of an air suspension system for a vehicle provided in an embodiment of the present application;

[0028] FIG2 is a schematic structural diagram of an integrated pressure-maintaining valve provided in Example 1 of the present application;

[0029] FIG3 is a schematic cross-sectional view of the integrated pressure-maintaining valve in FIG2 ;

[0030] FIG4 is an exploded schematic diagram of the integrated pressure-maintaining valve in FIG2 ;

[0031] FIG5 is a schematic cross-sectional view of the valve housing in FIG2 ;

[0032] FIG6 is a schematic cross-sectional view of the valve core in FIG2 ;

[0033] FIG7 is a schematic diagram of the fixing member in FIG3 from a first perspective;

[0034] FIG8 is a schematic diagram of the fixing member in FIG3 from a second perspective;

[0035] FIG9 is a schematic diagram of the integrated pressure-maintaining valve in FIG2 when not connected to the air duct;

[0036] FIG10 is a schematic diagram of the integrated pressure-maintaining valve in FIG9 when the retaining ring is not installed;

[0037] FIG11 is a schematic diagram of the integrated pressure-maintaining valve in FIG10 after the retaining ring is installed;

[0038] FIG12 is a schematic diagram of an integrated pressure-maintaining valve and an air duct after installation, provided in Example 2 of the present application;

[0039] FIG13 is a cross-sectional schematic diagram of the integrated pressure-maintaining valve and air conduit in FIG12 ;

[0040] FIG14 is a schematic cross-sectional view of the valve housing in FIG12 ;

[0041] FIG15 is a schematic structural diagram of the fixing member in FIG13;

[0042] FIG16 is a schematic structural diagram of the limiting ring in FIG13 ;

[0043] FIG17 is a schematic structural diagram of the fixing ring in FIG13;

[0044] FIG18 is a schematic structural diagram of the disassembly sleeve in FIG13.

[0045] Explanation of reference numerals: 1-integrated pressure-maintaining valve; 2-air pump; 3-air storage tank; 4-air spring; 5-air guide tube; 501-insertion mark; 10-valve housing; 101-first end; 1011-sealing surface; 102-second end; 103-sealing ring; 104-first step; 105-second step; 106-third step; 107-fourth step; 111-first section; 112-second section; 113-third section; 114-fourth section; 115-fifth section; 21-valve core; 211-gas channel; 212-conduction port; 213-slot; 214-valve core step; 22-reset member; 23-first sealing member; 31-fixing member; 311-annular body; 312-cantilever; 3121-cylindrical surface; 3122-conical surface; 3123-first limiting step; 313-fixing protrusion; 32-snapping ring; 33-limiting ring; 331-limiting surface; 34-fixing ring; 341-second limiting step; 35-disassembly sleeve; 351-matching step; 352-disassembly surface; 40-second sealing member. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] It should be noted that 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 the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise specified or limited, the terms "installed," "connected," "fixed," and the like should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication between them; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0049] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0050] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0051] As described in the background, the installation of air suspension systems is time-consuming and labor-intensive. The applicant's research revealed that this problem arises because, during installation, the air spring is deflated and empty of gas. This requires adjusting the air spring's shape to resemble that of a fully inflated one, a time-consuming and labor-intensive process.

[0052] In order to solve the above problems, the embodiments of the present application provide an integrated pressure-maintaining valve, an air suspension system and a vehicle. The integrated pressure-maintaining valve has a pressure-maintaining function and a fixing function. During the installation of the air suspension system, the integrated pressure-maintaining valve is connected to the air port of the air spring, and the integrated pressure-maintaining valve is in a pressure-maintaining state, which can ensure the internal gas pressure of the air spring, avoid adjusting the shape of the air spring, and make the installation of the air spring time-saving and labor-saving. After the air spring is installed on the vehicle frame, the air duct is directly inserted into the integrated pressure-maintaining valve, and the air duct is fixed by the integrated pressure-maintaining valve, so that the air duct can be connected to the air port of the air spring, thereby making the installation process of the air suspension system time-saving and labor-saving.

[0053] The integrated pressure-maintaining valve, air suspension system, and vehicle provided in the embodiments of the present application are described in detail below with reference to specific embodiments.

[0054] As shown in Figure 1, an embodiment of the present application provides an integrated pressure-maintaining valve 1, which is applied to the air suspension system of a vehicle. The air suspension system includes a vehicle frame, an air pump 2, an air tank 3, an air spring 4, and an air duct 5. The air pump 2, the air tank 3, and the air spring 4 are mounted on the vehicle frame, the air pump 2 is connected to the air tank 3, the air duct 5 is connected to the air tank 3, and the integrated pressure-maintaining valve 1 is detachably mounted between the air duct 5 and the air spring 4. When the air spring 4 needs to be inflated, the air pump 2 is started to inflate the air in the air tank 3 through the air duct 5 and the integrated pressure-maintaining valve 1; when the air spring 4 needs to be deflated, the gas in the air spring 4 is discharged into the air tank 3 through the integrated pressure-maintaining valve 1 and the air duct 5.

[0055] As shown in Figures 2 to 5, the integrated pressure-maintaining valve 1 includes a valve housing 10, a pressure-maintaining assembly and a fixing assembly; the valve housing 10 has a first end 101 and a second end 102 arranged opposite to each other in the axial direction of the integrated pressure-maintaining valve, and the valve housing 10 is detachably connected to the air port of the air spring 4; the pressure-maintaining assembly includes a valve core 21, a reset member 22 and a first sealing member 23, the valve core 21 is located in the valve housing 10, the first sealing member 23 is fixed on the valve core 21, the reset member 22 is connected between the valve housing 10 and the valve core 21, and the reset member 23 is fixed on the valve core 21. 22 is constructed to apply a force to the valve core 21 when the integrated pressure-maintaining valve 1 is in a pressure-maintaining state, so that the first sealing member 23 seals the first end 101; the fixing assembly includes a fixing member 31, and the fixing member 31 is located at least inside the valve housing 10. The fixing member 31 is constructed to be detachably connected to the air duct 5 when the air duct 5 is inserted into the integrated pressure-maintaining valve 1, so that the air duct 5 separates the first sealing member 23 from the first end 101 through the valve core 21, and connects the air duct 5 to the air port of the air spring 4.

[0056] The axial direction of the integrated pressure-maintaining valve 1 is the X-axis direction. The valve housing 10 has a cavity, which penetrates the valve housing 10 along the axial direction of the integrated pressure-maintaining valve 1 , and the cross section of the cavity may be circular.

[0057] In the axial direction of the integrated pressure maintaining valve 1 , the first end 101 of the valve housing 10 faces the air spring 4 , and the second end 102 is away from the air spring 4 .

[0058] As shown in FIG2 , a sealing ring 103 is provided on the valve housing 10. The sealing ring 103 may be made of rubber. When the valve housing 10 is connected to the air spring 4, the sealing ring 103 can contact the outer wall of the valve housing 10 and the inner wall of the air port of the air spring 4, ensuring the sealing between the valve housing 10 and the air spring 4.

[0059] The valve core 21 can move in the cavity of the valve housing 10. The first sealing member 23 can be made of rubber material. In some examples, the first sealing member 23 can be a rubber ring.

[0060] The connection between the first sealing member 23 and the valve core 21 includes, but is not limited to, snap connection and bonding.

[0061] The reset member 22 can be compressed after being subjected to an external force and can return to its initial state after the external force is removed. The initial state of the reset member 22 is a state in which no external force is applied. The reset member 22 can be a spring or an elastic rubber.

[0062] When the integrated pressure-maintaining valve 1 is installed on the air spring 4 and the air conduit 5 is not installed with the integrated pressure-maintaining valve 1, the integrated pressure-maintaining valve 1 is in a pressure-maintaining state, and the integrated pressure-maintaining valve 1 can seal the gas in the air spring 4, thereby maintaining the gas pressure inside the air spring 4. Specifically, as shown in Figure 4, when the integrated pressure-maintaining valve 1 is installed on the air spring 4 and the air conduit 5 is not installed with the integrated pressure-maintaining valve 1, the reset member 22 applies a force to the valve core 21, which can cause the first sealing member 23 to seal the first end 101 of the valve housing 10, thereby causing the first end 101 of the valve housing 10 to seal the air port of the air spring 4, thereby sealing the gas in the air spring 4 and maintaining the gas pressure inside the air spring 4.

[0063] When the integrated pressure-maintaining valve 1 is installed on the air spring 4 and the air duct 5 is installed with the integrated pressure-maintaining valve 1, the air duct 5 is inserted into the integrated pressure-maintaining valve 1, and the fixing member 31 fixes the air duct 5, so that the air duct 5 can separate the first sealing member 23 from the first end 101 through the valve core 21, that is, the first sealing member 23 does not seal the first end 101 of the valve housing 10, so that the air duct 5 can be connected with the air port of the air spring 4.

[0064] The integrated pressure-maintaining valve provided in the embodiment of the present application is connected to the air port of the air spring 4 through the integrated pressure-maintaining valve 1 during the installation of the air suspension system. The reset member 22 of the integrated pressure-maintaining valve 1 applies a force to the valve core 21, which can make the first sealing member 23 seal the first end 101. The integrated pressure-maintaining valve 1 is in a pressure-maintaining state, thereby ensuring the internal gas pressure of the air spring 4, avoiding the need to adjust the shape of the air spring 4, and making the installation of the air spring 4 time-saving and labor-saving. Afterwards, after the air spring 4 is installed on the vehicle frame, the air duct 5 is directly inserted into the integrated pressure-maintaining valve 1, and the air duct 5 is fixed by the fixing member 31, so that the air duct 5 can be connected to the air port of the air spring 4, thereby making the installation process of the air suspension system time-saving and labor-saving. In addition, when the air duct 5 is disengaged from the integrated pressure-maintaining valve 1, the reset part 22 of the integrated pressure-maintaining valve 1 applies a force to the valve core 21, which can make the first sealing part 23 seal the first end 101, and the integrated pressure-maintaining valve 1 is in a pressure-maintaining state, ensuring the internal gas pressure of the air spring 4, thereby ensuring the driving safety of the vehicle; when testing the air tightness of the air spring, the air duct 5 is removed, and ... facilitating the testing of the air tightness of the air spring 4.

[0065] In a possible embodiment, as shown in Figure 6, the valve core 21 has a gas channel 211 and a conducting port 212. The gas channel 211 passes through the end of the valve core 21 away from the air spring 4 in the axial direction of the integrated pressure maintaining valve 1. The conducting port 212 is connected to the gas channel 211, and the gas channel 211 can be connected to the air duct 5.

[0066] As shown in Figures 4 and 5, the first sealing member 23 is stuck on the valve core 21, and the valve housing 10 has a sealing surface 1011. The first sealing member 23 contacts the sealing surface 1011 so that the conducting port 212 of the valve core 21 is located on the side of the first sealing member 23 away from the air spring 4.

[0067] The valve core 21 may be cylindrical in shape, and at least a portion of the valve core 21 is in contact with the inner wall of the valve housing 10 , with the axis of the valve core 21 coinciding with the axis of the integrated pressure-maintaining valve 1 .

[0068] The gas channel 211 may be cylindrical in shape.

[0069] The shape of the conducting opening 212 is not specifically set here. The number of the conducting opening 212 can be one or more.

[0070] The first sealing member 23 is a rubber ring. A clamping groove 213 is provided on the valve core 21, and the rubber ring is clamped in the clamping groove 213.

[0071] The reset member 22 is a spring. A first step 104 is provided inside the valve housing 10 . The valve core 21 has a valve core step 214 . The spring abuts between the first step 104 and the valve core step 214 .

[0072] The sealing surface 1011 is located at the first end 101 of the valve housing 10. As shown in FIG4 , when the integrated pressure-maintaining valve 1 is installed on the air spring 4 and the air conduit 5 is not installed with the integrated pressure-maintaining valve 1, the integrated pressure-maintaining valve 1 is in a pressure-maintaining state, and the first sealing member 23 contacts the sealing surface 1011, so that the conducting port 212 of the valve core 21 is located on the side of the first sealing member 23 away from the air spring 4. In other words, the conducting port 212 of the valve core 21 is not in communication with the air port of the air spring 4.

[0073] When the integrated pressure-maintaining valve 1 is installed on the air spring 4 and the air duct 5 is installed with the integrated pressure-maintaining valve 1, the air duct 5 is inserted into the integrated pressure-maintaining valve 1, the air duct 5 pushes the valve core 21, the valve core 21 compresses the spring, and the valve core 21 moves toward the air port of the air spring 4, so that the air duct 5 can separate the first sealing component 23 from the sealing surface 1011 through the valve core 21, the gas channel 211 of the valve core 21 is connected to the air duct 5, the conducting port 212 of the valve core 21 is connected to the air port of the air spring 4, and the fixing part 31 fixes the air duct 5.

[0074] In a possible embodiment, as shown in Figures 3 and 4, the integrated pressure-maintaining valve 1 also includes a second sealing member 40, and a second step 105 is provided inside the valve housing 10. The second step 105 is farther away from the air spring 4 than the first step 104 in the axial direction of the integrated pressure-maintaining valve 1. The second sealing member 40 is located between the pressure-maintaining assembly and the fixed assembly in the axial direction of the integrated pressure-maintaining valve 1, and the second sealing member 40 is in contact with the second step 105.

[0075] When the air duct 5 is inserted into the integrated pressure-maintaining valve 1, the inner side of the second sealing member 40 abuts against the outer wall of the air duct 5, while the outer side of the second sealing member 40 abuts against the inner wall of the valve housing 10. This arrangement improves the sealing between the air duct 5 and the integrated pressure-maintaining valve 1, preventing air leakage between the air duct 5 and the integrated pressure-maintaining valve 1.

[0076] The second sealing member 40 may be made of a rubber material. In some examples, the second sealing member 40 may be a rubber ring.

[0077] The number of the second sealing member 40 may be one or more, which is not specifically set here.

[0078] In one possible embodiment, as shown in Figures 7 and 8, the fixing member 31 can move upward along the axis of the integrated pressure-maintaining valve 1. The fixing member 31 includes a circular ring body 311, multiple cantilevers 312 and multiple fixing protrusions 313. The multiple cantilevers 312 and the multiple fixing protrusions 313 are fixedly connected in sequence along the circumferential direction of the circular ring body 311. Adjacent cantilevers 312 are spaced apart. At least one fixing protrusion 313 is fixed on the inner side of each cantilever 312, and the fixing protrusion 313 can squeeze the air duct 5.

[0079] As shown in Figure 5, the cavity of the valve housing 10 includes a first section 111, a second section 112, a third section 113, a fourth section 114 and a fifth section 115, which are connected in sequence along the axial direction of the integrated pressure-maintaining valve 1. The inner walls of the first section 111, the second section 112, the third section 113 and the fifth section 115 are all cylindrical, and the inner wall of the fourth section 114 is conical. The diameter of the first section 111 is smaller than the diameter of the second section 112, the diameter of the second section 112 is smaller than the diameter of the third section 113, the diameter of the third section 113 is larger than the diameter of the fifth section 115, and the diameter of the fourth section 114 gradually decreases from the third section 113 to the direction of the fifth section 115. A first step 104 is formed between the first section 111 and the second section 112, a second step 105 is formed between the second section 112 and the third section 113, and a third step 106 is formed between the fourth section 114 and the fifth section 115.

[0080] The annular body 311 of the fixing member 31 is located outside the valve housing 10 and can abut against the second end 102 of the valve housing 10 . The multiple cantilevers 312 and multiple fixing protrusions 313 of the fixing member 31 are located inside the valve housing 10 .

[0081] The cantilever 312 has a cylindrical surface 3121 , a conical surface 3122 and a first limiting step 3123 . The cylindrical surface 3121 fits against the inner wall of the third section 113 , and the conical surface 3122 fits against the inner wall of the fourth section 114 .

[0082] The first limiting step 3123 can abut against the third step 106 to limit the fixing member 31 from being separated from the valve housing 10 .

[0083] The number of cantilevers 312 and fixing protrusions 313 is not specifically set. In some examples, the fixing protrusions 313 are connected to the cantilevers 312 at an angle, and the number of cantilevers 312 is four, and the number of fixing protrusions 313 is four.

[0084] The cantilever 312 can be made of plastic, and the fixing protrusion 313 can be made of metal. The air duct 5 is made of plastic. It should be noted that an insertion mark 501 is provided on the air duct 5. In other words, the portion between the inserted end of the air duct 5 and the insertion mark 501 is where the air duct 5 is inserted into the integrated pressure-maintaining valve 1.

[0085] As shown in Figure 9, when the air duct 5 is installed with the integrated pressure-maintaining valve 1, the fixing part 31 pushes toward the air spring 4, so that the annular body 311 abuts against the second end 102 of the valve housing 10. At this time, the cylindrical surface 3121 fits against the inner wall of the third section 113. Afterwards, as shown in Figure 10, the inserted end of the air duct 5 is inserted into the integrated pressure-maintaining valve 1. The air duct 5 contacts and pushes the valve core 21. The valve core 21 compresses the spring, and the valve core 21 moves toward the air port of the air spring 4. The first sealing part 23 disengages from the sealing surface 1011, and the gas channel 211 of the valve core 21 is connected with the air duct 5. The conducting port 212 of the valve core 21 is connected with the air port of the air spring 4. When the insertion mark 501 enters the inner of the integrated pressure-maintaining valve 1 When the first stop step 3123 abuts the third step 106, the insertion of the air duct 5 is stopped. Thereafter, the fixing member 31 is pulled out away from the air spring 4. The conical surface 3122 of the fixing member 31 slides along the inner wall of the fourth section 114 of the valve housing 10. The cantilever 312 of the fixing member 31 is squeezed by the inner wall of the fourth section 114, and the cantilever 312 of the fixing member 31 is deformed toward the air duct 5. The fixing protrusion 313 of the fixing member 31 squeezes the air duct 5, causing a depression on the surface of the air duct 5. When the first limiting step 3123 abuts the third step 106, the pulling of the fixing member 31 is stopped. At this time, the cylindrical surface 3121 is in contact with the inner wall of the third section 113, and the conical surface 3122 is in contact with the inner wall of the fourth section 114. The fixing member 31 fixes the air duct 5, and the air duct 5 is installed. It should be noted that when the air duct 5 is installed in the integrated pressure-maintaining valve 1, the axis of the air duct 5 is coaxial with the axis of the valve core 21.

[0086] When the air duct 5 is removed from the integrated pressure-maintaining valve 1, the fixing member 31 pushes toward the air spring 4, and the conical surface 3122 of the fixing member 31 slides along the inner wall of the fourth section 114 of the valve housing 10, and the fixing protrusion 313 of the fixing member 31 gradually disengages from the air duct 5. When the annular body 311 abuts against the second end 102 of the valve housing 10, the fixing protrusion 313 of the fixing member 31 disengages from the air duct 5, that is, the fixing member 31 is no longer in contact with the air duct 5, that is, the fixing member 31 unlocks the air duct 5. At this time, the air duct 5 is pulled out of the integrated pressure-maintaining valve 1, and the air duct 5 is completely disassembled.

[0087] In one possible embodiment, as shown in FIG11 , the fixing assembly further includes a retaining ring 32, which can be retained on the multiple cantilever arms 312 of the fixing member 31. When the air conduit 5 is mounted on the integrated pressure-maintaining valve 1, the retaining ring 32 is retained on the multiple cantilever arms 312 of the fixing member 31. The retaining ring 32 abuts against the annular body 311 and the second end 102 of the valve housing 10, respectively, thereby preventing the fixing member 31 from moving toward the air spring 4 and ensuring that the integrated pressure-maintaining valve 1 is stably fixed to the air conduit 5.

[0088] Among them, when the air duct 5 is disassembled from the integrated pressure-maintaining valve 1, the retaining ring 32 is first removed from the fixing part 31, and then the fixing part 31 is pushed toward the air spring 4, and the annular body 311 abuts against the second end 102 of the valve housing 10. Then, the air duct 5 is pulled out from the integrated pressure-maintaining valve 1, and the air duct 5 is disassembled.

[0089] The integrated pressure-maintaining valve 1 in the second embodiment differs from the integrated pressure-maintaining valve 1 in the first embodiment in that the valve housing 10 and the fixing assembly are different. The pressure-maintaining assembly of the integrated pressure-maintaining valve 1 in the second embodiment is the same as that of the integrated pressure-maintaining valve 1 in the first embodiment.

[0090] In a possible embodiment, as shown in Figures 12 to 15, the fixing member 31 is fixed in the valve housing 10, and the fixing member 31 includes a circular ring body 311 and a plurality of cantilevers 312. The axis of the circular ring body 311 is coaxially arranged with the axis of the valve core 21. The plurality of cantilevers 312 are fixedly connected to the circular ring body 311 in sequence along the circumferential direction of the circular ring body 311. Adjacent two cantilevers 312 are arranged at intervals, and the cantilevers 312 can squeeze the air duct 5.

[0091] As shown in FIG15 , one end of the cantilever 312 away from the annular body 311 is inclined toward the axis of the annular body 311 .

[0092] As shown in Figures 13 and 14, the fixing assembly also includes a limiting ring 33, a fixing ring 34 and a disassembly sleeve 35. A third step 106 and a fourth step 107 are provided inside the valve housing. The limiting ring 33 and the fixing ring 34 are fixed between the third step 106 and the fourth step 107. The multiple cantilevers 312 of the fixing member 31 are located in the limiting ring 33, and the circular ring body 311 of the fixing member 31 is clamped between the limiting ring 33 and the fixing ring 34, so that the fixing member 31 can be fixed in the valve housing 10.

[0093] As shown in FIG. 16 , the limiting ring 33 has a limiting surface 331 , and the limiting surface 331 is a conical surface.

[0094] The disassembly sleeve 35 is movably limited between the fixing ring 34 and the fixing part 31. When the air duct 5 is disassembled from the integrated pressure-maintaining valve 1, the disassembly sleeve 35 squeezes the multiple cantilevers 312 of the fixing part 31 along the axial direction of the integrated pressure-maintaining valve 1 to separate the multiple cantilevers 312 of the fixing part 31 from the air duct 5.

[0095] As shown in FIG. 17 and FIG. 18 , the fixing ring 34 has a second limiting step 341 , and the disassembly sleeve 35 has a matching step 351 . The matching step 351 can engage with the second limiting step 341 to limit the disassembly sleeve 35 from being separated from the valve housing 10 .

[0096] As shown in FIG18 , the disassembly sleeve 35 also has a disassembly surface 352 , which is a conical surface. The disassembly surface 352 is used to separate the multiple cantilevers 312 of the fixing member 31 from the air duct 5 when the air duct 5 is disassembled from the integrated pressure-maintaining valve 1 , so as to disassemble the air duct 5 .

[0097] The cantilever 312 can be made of metal. The air duct 5 is made of plastic. It should be noted that the air duct 5 is provided with an insertion mark 501 (see FIG9 ). In other words, the portion between the inserted end of the air duct 5 and the insertion mark 501 is where the air duct 5 is inserted into the integrated pressure-maintaining valve 1.

[0098] As shown in Figure 12, when the air duct 5 is installed with the integrated pressure-maintaining valve 1, the disassembly sleeve 35 is pulled in the direction away from the air spring 4, and the matching step 351 of the disassembly sleeve 35 is abutted against the second limiting step 341. At this time, the disassembly surface 352 of the disassembly sleeve 35 does not contact the cantilever 312 of the fixing member 31; thereafter, the inserted end of the air duct 5 is inserted into the integrated pressure-maintaining valve 1, and the cantilever 312 of the fixing member 31 squeezes the air duct 5 and causes a depression on the surface of the air duct 5. The air duct 5 contacts and pushes the valve core 21. The valve core 21 compresses the spring, and the valve core 21 moves toward the air port of the air spring 4. The first sealing member 23 is separated from the sealing surface 1011, and the gas channel 211 of the valve core 21 is connected to the air duct 5. The conducting port 212 of the valve core 21 is connected to the air port of the air spring 4. When the insertion mark 501 enters the interior of the integrated pressure-maintaining valve 1, the insertion of the air duct 5 is stopped. At this time, the fixing member 31 fixes the air duct 5, and the installation of the air duct 5 is completed. It should be noted that, when the air conduit 5 is installed to the integrated pressure-maintaining valve 1 , the axis of the air conduit 5 can be coaxial with the axis of the valve core 21 .

[0099] When the air duct 5 is removed from the integrated pressure-maintaining valve 1, the disassembly sleeve 35 is pushed toward the air spring 4. The disassembly surface 352 of the disassembly sleeve 35 contacts the multiple cantilever arms 312 of the fixing member 31. The disassembly surface 352 presses the cantilever arms 312 toward the limiting surface 331 of the limiting ring 33. When the cantilever arms 312 contact the limiting surface 331, the multiple cantilever arms 312 of the fixing member 31 are separated from the air duct 5. At this time, the air duct 5 is pulled out of the integrated pressure-maintaining valve 1, and the air duct 5 is completely removed. The limiting surface 331 of the limiting ring 33 can limit the multiple cantilever arms 312 of the fixing member 31, thereby preventing excessive deformation of the multiple cantilever arms 312 of the fixing member 31.

[0100] An embodiment of the present application provides an air suspension system, including an air spring 4 , an air duct 5 and an integrated pressure-maintaining valve 1 ; the integrated pressure-maintaining valve 1 is detachably installed between the air spring 4 and the air duct 5 .

[0101] Among them, the integrated pressure-maintaining valve 1 in this embodiment has the same structure as the integrated pressure-maintaining valve provided in any of the above embodiments, and can bring the same or similar technical effects. They will not be described one by one here, and the details can be referred to the description of the above embodiments.

[0102] An embodiment of the present application provides a vehicle, including an air suspension system.

[0103] Among them, the air suspension system in this embodiment has the same structure as the air suspension system provided in any of the above embodiments, and can bring the same or similar technical effects. They will not be described one by one here, and the details can be referred to the description of the above embodiments.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated pressure-holding valve is applied to the air suspension system of a vehicle. The air suspension system includes an air spring and an air duct, and is characterized in that, The integrated pressure-holding valve includes a valve housing, a pressure-holding component, and a fixing component; The valve housing has a first end and a second end oppositely arranged in the axial direction of the integrated pressure-holding valve, and the valve housing is detachably connected to the air port of the air spring; The pressure-holding component includes a valve core, a reset member, and a first seal. The valve core is located at the first end of the valve housing, the first seal is fixed on the valve core, the reset member is connected between the valve housing and the valve core, and the reset member is configured to apply a force to the valve core when the integrated pressure-holding valve is in a pressure-holding state, so that the first seal seals the first end; The fixing component includes a fixing member, at least part of the fixing member is located inside the valve housing, and the fixing member is configured to be detachably connected to the air duct when the air duct is inserted into the integrated pressure-holding valve, so that the air duct disengages the first seal from the first end through the valve core and conducts the air duct to the air port of the air spring.

2. The integrated pressure holding valve according to claim 1, wherein, The valve core has a gas passage and a conduction port. The gas passage axially penetrates through the end of the valve core away from the air spring in the integrated pressure-holding valve, the conduction port is communicated with the gas passage, and the gas passage can be communicated with the air duct; The first seal is stuck on the valve core, the valve housing has a sealing surface, and the first seal contacts the sealing surface so that the conduction port of the valve core is located on the side of the first seal away from the air spring.

3. The integrated pressure holding valve according to claim 2, wherein The reset member is a spring. A first step is provided inside the valve housing, the valve core has a valve core step, and the spring abuts between the first step and the valve core step.

4. The integrated pressure holding valve according to claim 3, characterized in that, It further includes a second seal. A second step is provided inside the valve housing, and the second step is farther away from the air spring than the first step in the axial direction of the integrated pressure-holding valve. The second seal is axially located between the pressure-holding component and the fixing component, and the second seal abuts against the second step. When the air duct is inserted into the integrated pressure-holding valve, the inner side of the second seal abuts against the outer wall of the air duct, and the outer side of the second seal abuts against the inner wall of the valve housing.

5. The integrated pressure maintaining valve according to any one of claims 1-4, characterized in that, The fixing member can move along the axial direction of the integrated pressure-holding valve. The fixing member includes a circular ring body, a plurality of cantilevers, and a plurality of fixing protrusions. The plurality of cantilevers and the plurality of fixing protrusions are sequentially fixedly connected along the circumferential direction of the circular ring body, and adjacent two cantilevers are spaced apart. At least one fixing protrusion is fixed on the inner side of each cantilever, and the fixing protrusion can squeeze the air duct.

6. The integrated pressure holding valve according to claim 5, wherein, The fixing component further includes a snap ring, and the snap ring can be stuck on the plurality of cantilevers of the fixing member.

7. The integrated pressure-holding valve according to any one of claims 1-4, characterized in that, The fixing member is fixed inside the valve housing. The fixing member includes a circular ring body and a plurality of cantilevers. The axis of the circular ring body is coaxially arranged with the axis of the valve core. The plurality of cantilevers are sequentially fixedly connected to the circular ring body along the circumferential direction of the circular ring body, and adjacent two cantilevers are spaced apart. The cantilever can squeeze the air duct.

8. The integrated pressure-holding valve according to claim 7, characterized in that, The fixed component further includes a limiting ring, a fixing ring and a dismounting sleeve. A third step and a fourth step are provided inside the valve housing. The limiting ring and the fixing ring are fixed between the third step and the fourth step, and the circular ring body of the fixing member is clamped between the limiting ring and the fixing ring; The dismounting sleeve is movably limited between the fixing ring and the fixing member. When the air duct is detached from the integrated pressure maintaining valve, the dismounting sleeve axially presses a plurality of cantilevers of the fixing member along the integrated pressure maintaining valve, so that the plurality of cantilevers of the fixing member are separated from the air duct.

9. An air suspension system, characterized in that, It includes an air spring, an air duct and the integrated pressure maintaining valve according to any one of claims 1-8; The integrated pressure maintaining valve is detachably installed between the air spring and the air duct.

10. A vehicle, characterized in that, It includes the air suspension system according to claim 9.

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