Valve body and air supply device for closed air suspension system

Abstract

The present application relates to a valve body and a gas supply device for a closed air suspension system. The valve body is configured as a gas supply device for a closed air suspension system, and a gas passage is configured in the valve body, which is communicated between a driving mechanism of the gas supply device and one or more air springs. The valve body comprises a plurality of sub-valve bodies stacked with each other, and a sealing ring is arranged on the surfaces adjacent to each other of each sub-valve body to seal the gas passage.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and more particularly to a valve body in an air supply device for a closed air suspension system. The invention also relates to an air supply device for a closed air suspension system including the valve body. Background Technology

[0002] The closed air suspension system is a core component of the vehicle chassis. By dynamically adjusting its own state, it directly determines the vehicle's comfort, handling, and off-road capability, and is a key support for achieving a high-performance driving experience.

[0003] A closed air suspension system generally consists of a sealed air chamber, air springs, and an air supply device. Air from the air chamber is supplied to the air springs via the air supply device to allow them to extend, increasing their stiffness and thus improving vehicle stability. Air from the air springs can also be released back into the air chamber for storage, causing them to contract and reducing their stiffness to better cushion the impact of bumpy roads.

[0004] However, the existing gas supply devices have a relatively complex structure, which makes their processing and assembly more complicated and their structure less compact.

[0005] Furthermore, because air supply systems generally have complex air passages, existing air supply systems are typically manufactured entirely of metal to facilitate the machining of these complex passages. However, metal air supply systems inevitably have a significant weight, which has a noticeable impact on vehicle energy consumption, handling balance, and load capacity. Summary of the Invention

[0006] This invention provides a valve body for an air supply device in a closed air suspension system, which can solve at least one of the above-mentioned problems. This invention also provides an air supply device for a closed air suspension system.

[0007] According to a first aspect of the invention, a valve body is provided in an air supply device for a closed air suspension system, the valve body being configured as an air supply device for a closed air suspension system, an air passage being constructed within the valve body, the air passage connecting the drive mechanism of the air supply device to one or more air springs, wherein the valve body includes a plurality of sub-valve bodies stacked on top of each other, and sealing rings are provided on adjacent surfaces of each sub-valve body to seal the air passage.

[0008] Preferably, the valve body includes an upper valve body, a middle valve body, and a lower valve body stacked on top of each other. The air passage includes: a first air passage extending longitudinally within the upper valve body, the upper end of the first air passage extending to the upper surface of the valve body and communicating with an air inlet, and the lower end communicating with the first piston chamber of the drive mechanism; a second air passage extending longitudinally within the middle valve body, the upper end of the second air passage communicating with the first piston chamber, and a one-way valve provided in the second air passage to allow gas to flow only from the first piston chamber to the second air passage; a third air passage extending laterally on the upper surface of the lower valve body, one end of the third air passage communicating with the lower end of the second air passage; a fourth air passage extending longitudinally obliquely within the upper and middle valve bodies, the lower end of the fourth air passage communicating with the other end of the third air passage; and a fifth air passage extending longitudinally obliquely within the upper valve body, the fourth air passage extending laterally obliquely within the middle valve body, the fourth air passage extending laterally obliquely within the middle valve body, and the fifth air passage extending laterally obliquely within the upper valve body. The upper end of the air passage and the upper end of the fifth air passage are connected to the drying box; a slot extending laterally on the lower surface of the upper valve body forms a sixth air passage when the upper valve body and the middle valve body are assembled together, and one end of the sixth air passage is connected to the lower end of the fifth air passage; a seventh air passage extending longitudinally within the middle valve body, the upper end of which is connected to the sixth air passage; an eighth air passage extending laterally on the upper surface of the lower valve body, one end of which is connected to the lower end of the seventh air passage, and a fifth solenoid valve is installed at the connection between the seventh and eighth air passages; and a ninth air passage extending longitudinally within the upper and middle valve bodies, the lower end of which is connected to the other end of the eighth air passage, and the upper end extending to the upper surface of the valve body and connected to the air storage chamber of the closed air suspension system.

[0009] Preferably, a waist-shaped first sealing ring is provided on the outer surface of the mating surface of the middle valve body. When the middle valve body is assembled with the upper valve body, the first sealing ring can ensure the sealing between the mating surface and the slot.

[0010] Preferably, the one or more air springs include a first air spring, a second air spring, a third air spring, and a fourth air spring. The air passage further includes: a fourteenth air passage extending longitudinally within the middle valve body, the upper end of the fourteenth air passage being connected to the other end of the sixth air passage; a fifteenth air passage extending laterally on the upper surface of the lower valve body, one end of the fifteenth air passage being connected to the lower end of the fourteenth air passage, and a sixth solenoid valve installed at the connection between the fifteenth air passage and the fourteenth air passage; a sixteenth air passage extending laterally on the upper surface of the lower valve body, one end of the sixteenth air passage being connected to one end of the fifteenth air passage; a seventeenth air passage extending laterally on the upper surface of the lower valve body, one end of the seventeenth air passage being connected to the middle of the sixteenth air passage, and the seventeenth air passage passing under the first piston chamber; an eighteenth air passage extending laterally on the upper surface of the lower valve body, the other end of the seventeenth air passage being connected to the middle of the eighteenth air passage; and a nineteenth air passage extending longitudinally within the upper valve body and the middle valve body. The system comprises the following air passages: The lower end of the nineteenth air passage is connected to one end of the eighteenth air passage, and the upper end is connected to the first air spring; a first solenoid valve is installed at the connection between the nineteenth and eighteenth air passages. The system also includes: a twentieth air passage extending longitudinally within the upper and middle valve bodies; the lower end of the twentieth air passage is connected to the other end of the eighteenth air passage, and the upper end is connected to the second air spring; a second solenoid valve is installed at the connection between the twentieth and eighteenth air passages. Furthermore, the system comprises: a twenty-first air passage extending longitudinally within the upper and middle valve bodies; the lower end of the twenty-first air passage is connected to the other end of the sixteenth air passage, and the upper end is connected to the third air spring; a third solenoid valve is installed at the connection between the twenty-first and sixteenth air passages. Finally, the system comprises: a twenty-second air passage extending longitudinally within the upper and middle valve bodies; the lower end of the twenty-second air passage is connected to one end of the sixteenth air passage, and the upper end is connected to the fourth air spring; a fourth solenoid valve is installed at the connection between the twenty-second and sixteenth air passages.

[0011] Preferably, the air passage further includes: a tenth air passage extending laterally on the upper surface of the lower valve body, one end of which is connected to one end of the eighth air passage and the lower end of the seventh air passage; an eleventh air passage extending longitudinally within the middle valve body, the lower end of which is connected to the other end of the tenth air passage, and the other end of which is connected to the second piston chamber of the drive mechanism; a twelfth air passage extending longitudinally within the middle valve body, the upper end of which is connected to the second piston chamber; and a thirteenth air passage extending laterally on the upper surface of the lower valve body, one end of which is connected to the lower end of the twelfth air passage, and the other end of which is connected to the other end of the third air passage.

[0012] Preferably, the air passage further includes a twenty-fourth air passage extending longitudinally within the middle valve body, the lower end of the twenty-fourth air passage being connected to the middle of the seventeenth air passage, and the upper end being connected to the first piston chamber.

[0013] Preferably, the air path further includes a second thirteenth air path extending laterally on the upper surface of the lower valve body, one end of the second thirteenth air path being connected to the other end of the sixteenth air path, and a status sensor being installed at the other end. The status sensor is configured to detect the status parameters of the first air spring, the second air spring, the third air spring, the fourth air spring, and / or the air storage chamber.

[0014] Preferably, the air passage further includes a second fifth air passage extending longitudinally within the middle valve body and the upper valve body, the lower end of the second fifth air passage being connected to the middle of the third air passage, and the upper end of the second fifth air passage extending to the upper surface of the valve body to communicate with the environment.

[0015] Preferably, the sub-valve body includes a lower valve body, and the air passages on the lower valve body include a first air passage combination, a second air passage combination, and a third air passage combination. A second sealing ring surrounding the first air passage combination, the second air passage combination, and the third air passage combination is provided on the upper surface of the lower valve body. A third sealing ring surrounding the second air passage combination is provided on the upper surface of the lower valve body. A fourth sealing ring surrounding the third air passage combination is provided on the upper surface of the lower valve body.

[0016] Preferably, the air passages on the lower valve body include: a first air passage combination, which includes a third air passage and a thirteenth air passage; a second air passage combination, which includes an eighth air passage and a tenth air passage; and a third air passage combination, which includes a fifteenth air passage, a sixteenth air passage, a seventeenth air passage, an eighteenth air passage, and a twenty-third air passage; wherein a second sealing ring surrounding the first air passage combination, the second air passage combination, and the third air passage combination is provided on the upper surface of the lower valve body; wherein a third sealing ring surrounding the second air passage combination is provided on the upper surface of the lower valve body; and wherein a fourth sealing ring surrounding the third air passage combination is provided on the upper surface of the lower valve body.

[0017] According to a second aspect of the invention, an air supply device for a closed air suspension system is provided, comprising the valve body described above. Attached Figure Description

[0018] The invention will be described in more detail below with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of an embodiment of an air supply device for a closed air suspension system according to the present invention is shown.

[0020] Figure 2 A schematic diagram of the air circuit structure of an embodiment of an air supply device for a closed air suspension system according to the present invention is shown.

[0021] Figure 3 Shown from another angle Figure 2 A schematic diagram of the gas supply device's gas circuit structure.

[0022] Figure 4 A top view of an embodiment of an upper valve body in an air supply device for a closed air suspension system according to the present invention is shown.

[0023] Figure 5 Showing Figure 4 A bottom view of the upper valve body.

[0024] Figure 6 A schematic diagram of one embodiment of the central valve body in an air supply device for a closed air suspension system according to the present invention is shown.

[0025] Figure 7 A schematic diagram of a lower valve body in an air supply device for a closed air suspension system according to the present invention is shown.

[0026] Figure 8 A schematic diagram of another embodiment of the central valve body in an air supply device for a closed air suspension system according to the present invention is shown.

[0027] Figure 9 A schematic diagram of another embodiment of the lower valve body in an air supply device for a closed air suspension system according to the present invention is shown.

[0028] Figure 10 A schematic diagram of a structure of a drying box in an air supply device for a closed air suspension system according to the present invention is shown.

[0029] Figure 11 A schematic diagram of another embodiment of a drying box in an air supply device for a closed air suspension system according to the present invention is shown.

[0030] Figure 12 A first operating mode of an embodiment of a closed air suspension system according to the present invention is shown.

[0031] Figure 13 A second operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0032] Figure 14 A third operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0033] Figure 15 A fourth operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0034] Figure 16 The fifth operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0035] Figure 17 The sixth operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0036] Figure 18 The seventh operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0037] Figure 19 The eighth operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0038] Figure 20 The ninth operating mode of an embodiment of the closed air suspension system according to the present invention is shown.

[0039] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0040] The invention will now be further described with reference to the accompanying drawings.

[0041] The closed air suspension system of the present invention generally includes an air supply device 1, an air reservoir 50, and one or more air springs (e.g., a first air spring 60, a second air spring 70, a third air spring 80, and a fourth air spring 90). The air reservoir 50 may be an air tank, an air bottle, or any other suitable air storage device. Air reservoirs and air springs are known in the art and will not be described in detail here.

[0042] like Figure 1 As shown, the air supply device 1 includes a drive mechanism. This drive mechanism includes a motor 11 and a piston mechanism 12 coupled to the motor 11. The motor 11 can be a brushed motor or a brushless motor. The piston mechanism 12 includes a drive disc 121 connected to the output shaft of the motor 11. The axis of rotation of the drive disc 121 is coaxial with the axis of the output shaft of the motor 11. Thus, the motor 11 can drive the drive disc 121 to rotate about its axis. A drive rod extending axially (i.e., longitudinally) is constructed on the side of the drive disc 121 facing away from the motor 11. This drive rod is eccentrically arranged relative to the axis of the drive disc 121. Therefore, when the drive disc 121 rotates, the drive rod can follow the drive disc 121 in a circular motion.

[0043] The piston mechanism 12 also includes a pair of piston assemblies. Each piston assembly includes piston rods 122 and 124 extending in a direction perpendicular to the axial direction of the drive turntable 121 (hereinafter referred to as "lateral"). One end of the piston rods 122 and 124 is hinged to a drive rod, and the other end is hinged to a piston body 123 and 125. The pair of piston assemblies are arranged opposite to each other. The piston mechanism 12 also includes laterally extending piston housings 127 and 128. The piston housings 127 and 128 are arranged opposite to each other. The pair of piston assemblies extend within the piston housings 127 and 128 respectively, allowing the piston bodies 123 and 125 to slide in a sealing engagement with the piston housings 127 and 128. The piston housings 127 and 128 have closed ends. A closed piston chamber is formed between the piston housings 127 and 128 and the piston bodies 123 and 125, including a first piston chamber C1 and a second piston chamber C2.

[0044] The piston mechanism 12 also includes a connecting housing 126. The connecting housing 126 is connected to the piston housings 127 and 128 respectively, and is used to house the drive turntable 121. The motor 11 is mounted on the upper end of the connecting housing 126. Thus, when the drive mechanism is assembled together, it can form a pre-assembled, integral unit.

[0045] When motor 11 rotates, it drives drive turntable 121 to rotate, thereby causing piston rods 122 and 124 to alternately drive piston bodies 123 and 125 forward laterally (i.e., to move them towards the closed ends of piston housings 127 and 128). Thus, in the first driving state, the volume of the first piston chamber C1 decreases, while the volume of the second piston chamber C2 increases; in the second driving state, the volume of the first piston chamber C1 increases, while the volume of the second piston chamber C2 decreases.

[0046] The gas supply device 1 also includes a valve body 20. The valve body 20 includes a plurality of sub-valve bodies stacked sequentially from top to bottom along the aforementioned axial direction, including an upper valve body 21, a middle valve body 22, and a lower valve body 23.

[0047] like Figure 4 and Figure 5 As shown, the upper valve body 21 is generally constructed as a flat plate with a rectangular profile. The upper valve body 21 is configured with an upper receiving cavity A11 for accommodating the drive mechanism. The upper receiving cavity A11 includes a cylindrical through-hole located in the center of the upper valve body 21, and grooves constructed on the lower surface of the upper valve body 21 extending laterally on opposite sides of the cylindrical through-hole. These grooves may have a generally semi-circular cross-section.

[0048] In addition, such as Figure 6As shown, the middle valve body 22 is generally constructed as a flat plate with a rectangular profile. The middle valve body 22 is configured with a lower receiving cavity A12 for accommodating the drive mechanism. The lower receiving cavity A12 includes a cylindrical hole (which can be a blind hole or a through hole) extending longitudinally downward from the upper surface of the middle valve body 22, and grooves constructed on the upper surface of the middle valve body 22 extending laterally on opposite sides of the cylindrical hole. These grooves may also have a generally semi-circular cross-section.

[0049] By assembling the upper valve body 21 and the middle valve body 22 together, the upper receiving cavity A11 and the lower receiving cavity A12 can be made to face each other and communicate, thereby forming the receiving cavity A1. The drive mechanism, which is assembled as an integral unit, can be easily installed into the receiving cavity A1, so as to be assembled with the valve body 20 in a simple and convenient manner.

[0050] Figure 2 and Figure 3 A schematic diagram of the air passage formed within the valve body 20 is shown. This will be explained in detail below.

[0051] The gas path includes a longitudinally extending first gas path P1. The first gas path P1 is formed in the upper valve body 21, with its lower end extending into the drive mechanism and communicating with the first piston chamber C1, and its upper end extending to the upper surface of the upper valve body 21 and communicating with the air inlet 30. A corresponding one-way valve may be provided in the first gas path P1 and / or the air inlet 30 to allow, and only allow, gas to enter the first piston chamber C1 through the first gas path P1.

[0052] The air passage also includes a longitudinally extending second air passage P2. The second air passage P2 is formed in the middle valve body 22, with its upper end extending into the drive mechanism and communicating with the first piston chamber C1, and its lower end extending to the lower surface of the middle valve body 22 and exposed to the upper surface of the lower valve body 23. A one-way valve V10 is provided in the second air passage P2 to ensure that fluid (gas) can only flow from the first piston chamber C1 to the second air passage P2. Furthermore, the second air passage P2 is offset from the first air passage P1 in the lateral direction (first lateral direction) to avoid cross-contamination between the air passages. The upper end of the second air passage P2 is connected to the foremost (endmost) end of the first piston chamber C1.

[0053] The gas path also includes a third, laterally extending gas path, P3. See also Figure 7 The third air passage P3 is formed on the upper surface of the lower valve body 23. The third air passage P3 includes a first segment P3' extending generally along a first transverse direction and a second segment P3' extending generally along a second transverse direction (perpendicular to the first transverse direction). One end of the first segment P3' is connected to the lower end of the second air passage P2, and the other end is connected to one end of the second segment P3'.

[0054] The air passage also includes a fourth air passage P4 that extends generally longitudinally. The fourth air passage P4 includes a first segment 221 that extends longitudinally within the central valve body 22. Figure 6 ) and the second segment 211, which extends longitudinally and obliquely within the upper valve body 21 ( Figure 5 The lower end of the first segment 221 extends to the lower surface of the middle valve body 22 and connects to the other end of the second segment P3” of the third air passage P3. The upper end of the first segment 221 extends to the upper surface of the middle valve body 22. The lower end of the second segment 211 extends to the lower surface of the upper valve body 21 and connects to the first segment 221 of the fourth air passage P4.

[0055] like Figure 4 As shown, a mounting portion 218 for mounting the drying box 40 is constructed on the upper surface of the upper valve body 21. The mounting portion 218 includes an outer cylinder portion and an inner cylinder portion that are concentrically fitted together, and the outer cylinder portion and the inner cylinder portion extend longitudinally. Figure 2 and Figure 3 As shown, a first connecting cavity C4 with an annular cross-section is formed between the outer cylinder portion and the inner cylinder portion. A second connecting cavity C5 with a circular cross-section is formed inside the inner cylinder portion. The first connecting cavity C4 and the second connecting cavity C5 are connected through the interior of the drying box 40. The first connecting cavity C4 is connected to the upper end of the second section 211 of the aforementioned fourth gas passage P4.

[0056] The air passage also includes a fifth air passage P5 extending longitudinally at an angle. The fifth air passage P5 is inclined in opposite directions to the fourth air passage P4 in the first transverse direction. The fifth air passage P5 is formed in the upper valve body 21. The upper end of the fifth air passage P5 is connected to the aforementioned second communicating cavity C5, and the lower end extends to the lower surface of the upper valve body 21.

[0057] like Figure 5 As shown, the air passage also includes a slot 219 extending laterally (preferably in a second lateral direction). The slot 219 is formed on the lower surface of the upper valve body 21. The lower end of the aforementioned fifth air passage P5 is located within this slot 219. When the upper valve body 21 and the middle valve body 22 are assembled together, the slot 219 and the mating surface 229 on the upper surface of the middle valve body ( Figure 6 These components work together to form the sixth air passage P6. One end of the sixth air passage P6 is connected to the lower end of the fifth air passage P5.

[0058] The air passage also includes a seventh air passage P7 extending longitudinally. The seventh air passage P7 is located within the middle valve body 22. The upper end of the seventh air passage P7 connects to the sixth air passage P6, and the lower end extends to the lower surface of the middle valve body 22. (Example...) Figure 3 and Figure 6 As shown, the upper end of the seventh gas passage P7 is connected to the middle of the mating surface 229, and thus connected to the middle of the sixth gas passage P6.

[0059] The air passage also includes an eighth air passage P8 extending laterally (preferably along the first lateral direction) on the upper surface of the lower valve body 23. One end of the eighth air passage P8 is connected to the lower end of the aforementioned seventh air passage P7.

[0060] The gas path also includes a longitudinally extending ninth gas path P9. The ninth gas path P9 may include a first segment 227 extending longitudinally within the middle valve body 22 and a second segment 217 extending longitudinally within the upper valve body 21. The lower end of the first segment 227 is connected to the other end of the aforementioned eighth gas path P8, and the upper end is connected to the lower end of the second segment 217. The upper end of the second segment 217 extends to the upper surface of the upper valve body 21 and can communicate with the gas storage chamber 50. The gas storage chamber 50 may be any suitable gas storage chamber known to exist.

[0061] The air passage also includes a laterally extending tenth air passage P10. The tenth air passage P10 extends generally along the first transverse direction on the upper surface of the lower valve body 23, and can be arranged at an angle for a compact design. Figure 3 As shown, one end of the tenth gas passage P10 is connected to one end of the eighth gas passage P8 and the lower end of the seventh gas passage P7, while the other end extends directly below the second piston chamber C2. A fifth solenoid valve V5 can be installed at the connection between the seventh gas passage P7, the eighth gas passage P8, and the tenth gas passage P10. The fifth solenoid valve V5 can be used to control the gas flow between the seventh gas passage P7, the eighth gas passage P8, and the tenth gas passage P10 without affecting the gas flow between the eighth gas passage P8 and the tenth gas passage P10.

[0062] The air passage also includes an eleventh air passage P11 extending longitudinally within the central valve body 22. For example... Figure 1 and Figure 3 As shown, the lower end of the eleventh gas passage P11 is connected to the other end of the tenth gas passage P10, and the other end is connected to the second piston chamber C2. A seventh solenoid valve V7 can be installed at the connection between the eleventh gas passage P11 and the tenth gas passage P10. The seventh solenoid valve V7 can be used to control the flow of gas between the eleventh gas passage P11 and the tenth gas passage P10.

[0063] The air passage also includes a twelfth air passage P12 extending longitudinally within the central valve body 22. For example... Figure 1 and Figure 2 As shown, the upper end of the twelfth gas passage P12 is connected to the second piston chamber C2, and the lower end extends to the lower surface of the middle valve body 22. The twelfth gas passage P12 is offset from the eleventh gas passage P11 by a certain distance in the lateral direction (first lateral direction). The upper end of the twelfth gas passage P12 is connected to the front end (far end) of the second piston chamber C2. A one-way valve V11 is provided in the twelfth gas passage P12 so that the fluid (gas) can only flow in the direction from the second piston chamber C2 to the twelfth gas passage P12.

[0064] The air passage also includes a thirteenth air passage P13 extending generally laterally (first laterally) on the upper surface of the lower valve body 23. One end of the thirteenth air passage P13 is connected to the lower end of the twelfth air passage P12, and the other end is connected to the other end of the second segment P3” of the aforementioned third air passage P3. An angle 231 is formed between the second segment P3” and the thirteenth air passage P13. At this angle 231, the aforementioned fourth air passage P4, the thirteenth air passage P13, and the second segment P3” of the third air passage are connected.

[0065] The air passage also includes a fourteenth air passage P14 extending longitudinally within the central valve body 22. For example... Figure 3 and Figure 6 As shown, the upper end of the fourteenth air passage P14 extends to the mating surface 229 and is connected to the other end of the aforementioned sixth air passage P6, while the lower end extends to the lower surface of the middle valve body 22.

[0066] The gas path also includes a fifteenth gas path P15 extending generally laterally (second laterally) on the upper surface of the lower valve body 23. One end of the fifteenth gas path P15 is connected to the lower end of the fourteenth gas path P14. A sixth solenoid valve V6 is installed at the connection between the fifteenth gas path P15 and the fourteenth gas path P14. The sixth solenoid valve V6 can be used to control the flow of gas between the fifteenth gas path P15 and the fourteenth gas path P14.

[0067] The air passage also includes a sixteenth air passage P16 and an eighteenth air passage P18 extending generally along a second transverse direction on the upper surface of the lower valve body 23, and a seventeenth air passage P17 extending generally along a first transverse direction. The sixteenth air passage P16 and the eighteenth air passage P18 are parallel to each other and are located on opposite sides of the first piston chamber C1 in the first transverse direction. The seventeenth air passage P17 extends perpendicular to the sixteenth air passage P16 and the eighteenth air passage P18, with one end connected to the middle of the sixteenth air passage P16 and the other end connected to the middle of the eighteenth air passage P18. The eighteenth air passage P18 crosses the first piston chamber C1 from below in the first transverse direction. Figure 7 As shown, one end of the sixteenth gas path P16 is connected to the other end of the fifteenth gas path P15, thereby enabling gas to flow from the fifteenth gas path P15 to the sixteenth gas path P16, the seventeenth gas path P17 and the eighteenth gas path P18, and vice versa.

[0068] The air passage also includes a longitudinally extending nineteenth air passage P19, a twentieth air passage P20, a twenty-first air passage P21, and a twenty-second air passage P22. The lower end of the nineteenth air passage P19 is connected to one end of the eighteenth air passage P18, and the upper end is connected to the first air spring 60. The nineteenth air passage P19 includes a longitudinally extending first section 222 formed within the middle valve body 22 and a longitudinally extending second section 212 formed within the upper valve body 21. The lower end of the twentieth air passage P20 is connected to the other end of the eighteenth air passage P18, and the upper end is connected to the second air spring 70. The twentieth air passage P20 includes a longitudinally extending first section 223 formed within the middle valve body 22 and a longitudinally extending second section 213 formed within the upper valve body 21. The lower end of the twenty-first air passage P21 is connected to the other end of the sixteenth air passage P18, and the upper end is connected to the third air spring 80. The twenty-first air passage P21 includes a longitudinally extending first section 224 formed within the middle valve body 22 and a longitudinally extending second section 214 formed within the upper valve body 21. The lower end of the twenty-second air passage P22 is connected to one end of the sixteenth air passage P18, and the upper end is connected to the fourth air spring 90. The twenty-second air passage P22 includes a longitudinally extending first section 225 formed within the middle valve body 22 and a longitudinally extending second section 215 formed within the upper valve body 21.

[0069] A first solenoid valve V1 is installed at the connection between the eighteenth gas passage P18 and the nineteenth gas passage P19. The first solenoid valve V1 can be used to control the flow of gas between the eighteenth gas passage P18 and the nineteenth gas passage P19.

[0070] A second solenoid valve V2 is installed at the connection between the eighteenth gas passage P18 and the twentieth gas passage P20. The second solenoid valve V2 can be used to control the flow of gas between the eighteenth gas passage P18 and the twentieth gas passage P20.

[0071] A third solenoid valve V3 is installed at the connection point between the sixteenth gas passage P16 and the twenty-first gas passage P21. The third solenoid valve V3 can be used to control the flow of gas between the sixteenth gas passage P16 and the twenty-first gas passage P21.

[0072] A fourth solenoid valve V4 is installed at the connection point between the sixteenth gas passage P16 and the twenty-second gas passage P22. The fourth solenoid valve V4 can be used to control the flow of gas between the sixteenth gas passage P16 and the twenty-second gas passage P22.

[0073] The air path also includes a twenty-third air path P23 extending laterally (generally along the second lateral direction) on the upper surface of the lower valve body 23. One end of the twenty-third air path P23 is connected to the other end of the aforementioned sixteenth air path P16, and the other end is equipped with a status sensor S. The status sensor S can be used to detect at least one status parameter (including temperature, pressure, and any other suitable status parameter) of the first air spring 60, the second air spring 70, the third air spring 80, the fourth air spring 90, and / or the air reservoir 50.

[0074] For the present invention, more or fewer air springs can be set, and the air passage in the valve body 20 can be adjusted as needed.

[0075] The air passage also includes a twenty-fourth air passage P24 extending longitudinally within the central valve body 22. The lower end of the twenty-fourth air passage P24 connects to the middle of the seventeenth air passage P17, and the upper end connects to the first piston chamber C1. (As follows...) Figure 1 As shown, the 24th gas passage P24 is spaced apart from the 2nd gas passage P2 in the second transverse direction and can be arranged opposite to the 1st gas passage P1 in the longitudinal direction. An 8th solenoid valve V8 is installed at the connection point between the 24th gas passage P24 and the 17th gas passage P17. The 8th solenoid valve V8 can be used to control the flow of gas between the 24th gas passage P24 and the 17th gas passage P17.

[0076] The gas path also includes a longitudinally extending twenty-fifth gas path P25. The twenty-fifth gas path P25 includes a first section 226 formed in the middle valve body 22 and a second section 216 formed in the upper valve body 21. The lower end of the twenty-fifth gas path P25 communicates with the third gas path P3 (preferably at the junction between the first section P3' and the second section P3"), and the upper end communicates with the upper surface of the upper valve body 21 to communicate with the environment. This upper end may also communicate with the upper surface of the upper valve body 21 to communicate with an exhaust port for discharging gas from the gas path into the environment. A ninth solenoid valve V9 is installed at the junction between the twenty-fifth gas path P25 and the third gas path P3. The ninth solenoid valve V9 can be used to control the flow of gas between the twenty-fifth gas path P25 and the third gas path P3.

[0077] The valve body 20 described above adopts a split design consisting of an upper valve body 21, a middle valve body 22, and a lower valve body 23. The majority of the laterally extending air passages are distributed on the upper surface of the lower valve body 23. The upper valve body 21 and the middle valve body 22 mainly contain longitudinally extending air passages, with only a small number of inclined and lateral air passages distributed in the upper valve body 21. This split design and air passage structure allow the valve body 20 of this invention to be manufactured by injection molding, eliminating the need for complex cross-hole machining. This makes the manufacturing process of the valve body 20 easier and more cost-effective.

[0078] The valve body 20 can be made of plastic, such as plastic materials including, but not limited to, one or more of the following: PA6, PA66, PA6I, PA6T, PA9T and their copolymers, polycarbonate (PC), polyoxymethylene (POM), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), modified polyphenylene ether (MPPO / PPE), polyphenylene sulfide (PPS), polyetheretherketone (PEEK), polyetherketoneketone (PEKK), polyimide (PI), polyetherimide (PEI), polyamide-imide (PAI), liquid crystal polymer (LCP), polysulfone (PSU), polyethersulfone (PES), polyarylate (U-Polymer), and any one or more of the above fiber-reinforced modified materials, plastic alloys, or blends. This allows for a significant reduction in the manufacturing cost of the valve body 20 (approximately 3 / 4 reduction) and a significant reduction in its weight (approximately 70% reduction).

[0079] In addition, the motor 11 and the piston mechanism are made of metallic materials, including but not limited to one or more of the following: gray cast iron, ductile cast iron, vermicular graphite cast iron, malleable cast iron, carbon structural steel, high-quality carbon structural steel, alloy structural steel, carbon tool steel, spring steel, bearing steel; chromium steel, chromium-molybdenum steel, chromium-nickel-molybdenum steel, chromium-manganese-titanium steel, austenitic stainless steel, martensitic stainless steel, precipitation-hardening stainless steel, ferritic stainless steel, cast aluminum alloy, wrought aluminum alloy, aluminum-silicon alloy, aluminum-magnesium alloy, brass, bronze, cupronickel, copper-chromium alloy, copper-chromium-zirconium alloy, magnesium alloy; titanium alloy, industrial pure titanium, zinc alloy, iron-based powder metallurgy materials, copper-based powder metallurgy materials, stainless steel powder metallurgy materials, soft magnetic composite materials, nickel-based high-temperature alloys, cobalt-based high-temperature alloys, and iron-nickel-based high-temperature alloys. Alternatively, the motor 11 and the piston mechanism can be made of any one or more of the above materials through electroplating, chemical plating, anodizing, thermal spraying, carburizing, nitriding, or composite processes. This helps with high-temperature resistance, ensures the sealing performance of the piston mechanism, and avoids wear.

[0080] Furthermore, for the closed air suspension system of the present invention, the above-described air path design allows components requiring frequent maintenance and repair, such as the motor 11, air inlet 30, air outlet, dryer box 40, air reservoir 50, first air spring 60, second air spring 70, third air spring 80, and fourth air spring 90, to be installed on one side of the valve body 20 (i.e., the side where the upper surface of the upper valve body 21 is located). Circuit components (e.g., circuit boards) can be installed on the other side of the valve body 20 (i.e., the side where the lower surface of the lower valve body 23 is located). Solenoid valves (including the first solenoid valve V1, second solenoid valve V2, third solenoid valve V3, fourth solenoid valve V4, fifth solenoid valve V5, sixth solenoid valve V6, seventh solenoid valve V7, eighth solenoid valve V8, and ninth solenoid valve V9) are all installed in the longitudinal through-holes of the lower valve body 23, thereby allowing the solenoid valves to be easily electrically connected to the circuit components located on the other side of the valve body 20.

[0081] This arrangement makes the closed air suspension system of the present invention more compact and easier to maintain on site.

[0082] Furthermore, for valve body 20, each longitudinally extending air passage in the middle valve body 22 has a sealing ring installed at its corresponding surface joint. Specifically, a generally circular sealing ring (e.g., an O-ring) is provided around the upper end of the first section 221, 222, 223, 224, 225, 226, and 227 of each air passage in the middle valve body 22. This ensures the airtightness of the air passage.

[0083] In addition, such as Figure 6 As shown, a generally waist-shaped first sealing ring R1 is constructed on the mating surface 229 of the middle valve body 22 that mates with the slot 219. Thus, when the middle valve body 22 is assembled with the upper valve body 21, the sealing ring R1 can be used to ensure the sealing between the mating surface 229 and the slot 219, thereby ensuring the sealing of the sixth air passage P6.

[0084] In addition, such as Figure 7 As shown, on the upper surface of the lower valve body 23, corresponding sealing rings are provided for each air passage or air passage combination. Specifically, the air passages on the lower valve body 23 generally form three sets of air passage combinations, which are: the first air passage combination, including the third air passage P3 and the thirteenth air passage P13; the second air passage combination, including the eighth air passage P8 and the tenth air passage P10; and the third air passage combination, including the fifteenth air passage P15, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, and the twenty-third air passage P23.

[0085] To seal the air passages, a second sealing ring R2 is provided on the upper surface of the lower valve body 23, which surrounds all air passages (including the third air passage P3, the thirteenth air passage P13, the eighth air passage P8, the tenth air passage P10, the fifteenth air passage P15, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, and the twenty-third air passage P23). Additionally, a third sealing ring R3 and a fourth sealing ring R4 are provided on the upper surface of the lower valve body 23, which surround the second air passage combination. These third sealing rings P3 and R4 are surrounded by the second sealing ring R2. This ensures effective sealing of the air passages on the lower valve body 23.

[0086] exist Figures 4 to 7 In the embodiment shown, the upper valve body 21, the middle valve body 22, and the lower valve body 23 in the valve body 20 are all constructed as solid.

[0087] In another embodiment, such as Figure 8 and Figure 9 As shown, one or more of the upper valve body 21, middle valve body 22, and lower valve body 23 in the valve body 20 can be constructed as hollow. To ensure the strength of the valve body 20, stabilizing ribs for support can be formed in the valve body 20 (upper valve body 21, middle valve body 22, and lower valve body 23) to ensure the strength of the valve body 20. This hollow structure is more conducive to reducing the weight of the valve body 20 (e.g., reducing it by about 75%-80%).

[0088] In addition, when the valve body 20 is hollowed out, the thickness of the tube portion surrounding each air passage is, for example, between 1 and 10 mm, preferably between 2 and 8 mm, and more preferably between 3 and 6 mm.

[0089] In one example, the perforated valve body 20 can be sealed using a sealing ring. In this case, the thickness of the tube portion surrounding each air passage is approximately 6 mm to ensure the structural strength and sealing performance of the air passage.

[0090] In another example, the perforated valve body 20 can be connected and sealed by welding (e.g., thermoelectric welding). In this case, the thickness of the tubular portion surrounding each air passage only needs to be about 2-3 mm. This helps to further reduce the weight of the valve body 20. Figure 8 As shown, in this case, the mating surface 229 of the middle valve body 22 is replaced by the mating profile 229'.

[0091] Other methods may be used to seal the valve body 20 as needed.

[0092] Figure 10An embodiment of the drying box 40 of the present invention is shown. The drying box 40 includes a generally cylindrical outer cylinder 41. The outer cylinder 41 includes cylindrical sidewalls and a top wall connected to one end of the sidewalls. The top wall and the sidewalls may be integrally formed or connected together by welding, bonding, screws or any other suitable means. A threaded connection portion 411 is formed at the other end of the sidewall of the outer cylinder 41. The threaded connection portion 411 may be formed with external threads on the outer surface of the sidewall or with internal threads on the inner surface of the sidewall. The drying box 40 may be mounted at the mounting portion 218 mentioned above and threadedly connected to the outer cylinder portion of the mounting portion 218 via the threaded connection portion 411. If necessary, other means may also be used to connect the drying box 40 to the mounting portion 218.

[0093] The drying box 40 may further include an inner cylinder 42 concentrically fitted within the outer cylinder 41. The upper end of the inner cylinder 42 is connected to the top wall of the outer cylinder 41. When the drying box 40 is assembled onto the valve body 20, the inner cylinder 42 contacts the inner cylinder portion of the mounting portion 218. In one example, a seal (e.g., an O-ring) is provided between the inner cylinder 42 and the inner cylinder portion of the mounting portion 218 to ensure a sealing fit between the inner cylinder 42 and the inner cylinder portion. This helps to reduce thread stress at the threaded connection portion 411. In another example, the inner cylinder 42 is made of elastically deformable plastic. When the drying box 40 is mounted onto the valve body 20, the inner cylinder 42 abuts tightly against the inner cylinder portion of the mounting portion 218, causing the inner cylinder 42 and / or the inner cylinder portion to elastically deform, thereby ensuring a sealing fit between the inner cylinder 42 and the inner cylinder portion.

[0094] Additionally, a generally annular receiving space 43 is formed between the outer cylinder 41 and the inner cylinder 42 of the drying box 40. The drying box 40 also includes a desiccant filled within the receiving space 43. The desiccant may be pre-formed from compressed blocks or filter paper.

[0095] When the drying box 40 is assembled on the valve body 20, the aforementioned accommodating space 43 is connected to the first communicating cavity C4 at its lower end, while the inner cavity of the inner cylinder 42 is connected to the second communicating cavity C5 at its lower end.

[0096] exist Figure 10 In the illustrated embodiment, a radially penetrating flow hole 421 is constructed at the top of the inner cylinder 42, which communicates the receiving space 43 with the inner cavity of the inner cylinder 42. When multiple flow holes 421 are provided, they are evenly distributed circumferentially on the sidewalls of the inner cylinder 42. The flow holes 421 can have a semi-circular, circular, elliptical, rectangular, triangular, or any other suitable cross-section. This allows the gas to have the longest possible flow path within the drying box 40.

[0097] exist Figure 11In the illustrated embodiment, a plurality of flow holes 421 are constructed longitudinally on the side wall of the inner cylinder 42. The flow holes 421 near the lower end of the inner cylinder 42 have a smaller diameter, while the flow holes 421 near the upper end of the inner cylinder 42 have a larger diameter. This facilitates increased gas flow within the inner cylinder 42.

[0098] All of the aforementioned drying boxes 40 exhibit good gas drying performance. Furthermore, the design of the drying box 40 allows for easy installation and removal from the valve body 20 via a simple twisting motion. Users can easily replace the drying box 40.

[0099] The closed air suspension system of this invention has multiple operating modes. The following will combine... Figures 12 to 20 The operating mode of the closed air suspension system of the present invention will be described in detail.

[0100] Figure 12 The first operating mode of the closed air suspension system of the present invention is shown, which can be used to inject gas from the environment into the air storage chamber 50 for storage.

[0101] In the first operating mode, the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the sixth solenoid valve V6, the seventh solenoid valve V7, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the fifth solenoid valve V5 is in the open state. Gas from the environment can enter the gas storage chamber 50 through the air inlet 30, the first gas passage P1, the first piston chamber C1, the second gas passage P2, the third gas passage P3, the fourth gas passage P4, the first connecting chamber C4, the drying box 40, the second connecting chamber C5, the fifth gas passage P5, the sixth gas passage P6, the seventh gas passage P7, the eighth gas passage P8, and the ninth gas passage P9.

[0102] Figure 13 The second operating mode of the closed air suspension system of the present invention is shown, which can be used to discharge gas from the air reservoir 50 into the environment.

[0103] In the second operating mode, the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the sixth solenoid valve V6, the seventh solenoid valve V7, and the eighth solenoid valve V8 are in the closed state, while the fifth solenoid valve V5 and the ninth solenoid valve V9 are in the open state. The gas in the gas storage chamber 50 can be released into the environment through the ninth gas passage P9, the eighth gas passage P8, the seventh gas passage P7, the sixth gas passage P6, the fifth gas passage P5, the second connecting chamber C5, the drying box 40, the first connecting chamber C4, the fourth gas passage P4, the second section of the third gas passage P3", the twenty-fifth gas passage P25, and the exhaust nozzle.

[0104] Figure 14The third operating mode of the closed air suspension system of the present invention is shown, which can be used to inject gas directly into the air spring from the environment to adjust the stiffness of the air spring.

[0105] In the third operating mode, the fifth solenoid valve V5, the seventh solenoid valve V7, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, and the sixth solenoid valve V6 are in the open state. Gas from the environment can be injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 through the air inlet 30, the first air passage P1, the first piston chamber C1, the second air passage P2, the third air passage P3, the fourth air passage P4, the first connecting chamber C4, the drying box 40, the second connecting chamber C5, the fifth air passage P5, the sixth air passage P6, the fourteenth air passage, the fifteenth air passage P15, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, the nineteenth air passage P19, the twentieth air passage P20, the twenty-first air passage P21, and the twenty-second air passage P22.

[0106] It should be understood that the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 can be selectively opened and closed as needed to selectively inject gas into one or more of the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90. The amount of gas injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can also be adjusted by opening and closing the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4.

[0107] Figure 15 The fourth operating mode of the closed air suspension system of the present invention is shown, which can be used to inject gas from the air reservoir 50 into the air spring to adjust the stiffness of the air spring. This mode allows for rapid injection of air into the air spring, enabling quick adjustment of the air spring stiffness.

[0108] In the fourth operating mode, the seventh solenoid valve V7, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the fifth solenoid valve V5, and the sixth solenoid valve V6 are in the open state. The gas in the gas storage chamber 50 can be injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 through the ninth air passage P9, the eighth air passage P8, the seventh air passage P7, the sixth air passage P6, the fourteenth air passage P14, the fifteenth air passage P15, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, the nineteenth air passage P19, the twentieth air passage P20, the twenty-first air passage P21, and the twenty-second air passage P22.

[0109] It should be understood that the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 can be selectively opened and closed as needed to selectively inject gas into one or more of the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90. The amount of gas injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can also be adjusted by opening and closing the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4.

[0110] Figure 16 The fifth operating mode of the closed air suspension system of the present invention is shown, which can be used to inject further pressurized gas from the air reservoir 50 into the air spring to adjust the stiffness of the air spring. This mode allows for the rapid injection of pressurized air into the air spring to quickly increase its stiffness.

[0111] In the fifth operating mode, the fifth solenoid valve V5, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the sixth solenoid valve V6, and the seventh solenoid valve V7 are in the open state. The gas in the gas storage chamber 50 can be injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 through the ninth air passage P9, the eighth air passage P8, the tenth air passage P10, the eleventh air passage P11, the second piston chamber C2, the twelfth air passage P12, the thirteenth air passage P13, the fourth air passage P4, the first connecting chamber C4, the drying box 40, the second connecting chamber C5, the fifth air passage P5, the sixth air passage P6, the fourteenth air passage P14, the fifteenth air passage P15, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, the nineteenth air passage P19, the twentieth air passage P20, the twenty-first air passage P21, and the twenty-second air passage P22.

[0112] It should be understood that the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 can be selectively opened and closed as needed to selectively inject gas into one or more of the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90. The amount of gas injected into the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can also be adjusted by opening and closing the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4.

[0113] Figure 17 The sixth operating mode of the closed air suspension system of the present invention is shown, which can be used to transport the gas in the air spring back to the air storage chamber 50 and pressurize and store it.

[0114] In the sixth operating mode, the sixth solenoid valve V6, the seventh solenoid valve V7, and the ninth solenoid valve V9 are in the closed state, while the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the fifth solenoid valve V5, and the eighth solenoid valve V8 are in the open state. The gas in the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can enter the gas storage chamber 50 through the nineteenth gas passage P19, the twentieth gas passage P20, the twenty-first gas passage P21, the twenty-second gas passage P22, the sixteenth gas passage P16, the seventeenth gas passage P17, the eighteenth gas passage P18, the twenty-fourth gas passage P24, the first piston chamber C1, the second gas passage P2, the third gas passage P3, the fourth gas passage P4, the first connecting chamber C4, the drying box 40, the second connecting chamber C5, the fifth gas passage P5, the sixth gas passage P6, the seventh gas passage P7, the eighth gas passage P8, and the ninth gas passage P9.

[0115] It should be understood that the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 can be selectively opened and closed as needed to selectively discharge gas from one or more of the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90. The amount of gas discharged from the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can also be adjusted by opening and closing the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4.

[0116] Figure 18 The seventh operating mode of the closed air suspension system of the present invention is shown, which can be used to quickly expel gas from the air spring into the environment.

[0117] In the seventh operating mode, the fifth solenoid valve V5, the seventh solenoid valve V7, and the eighth solenoid valve V8 are in the closed state, while the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the sixth solenoid valve V6, and the ninth solenoid valve V9 are in the open state. The gas in the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can be released into the environment through the nineteenth air passage P19, the twentieth air passage P20, the twenty-first air passage P21, the twenty-second air passage P22, the sixteenth air passage P16, the seventeenth air passage P17, the eighteenth air passage P18, the fifteenth air passage P15, the fourteenth air passage P14, the sixth air passage P6, the fifth air passage P5, the second connecting cavity C5, the drying box 40, the first connecting cavity C4, the fourth air passage P4, the second section of the third air passage P3", the twenty-fifth air passage P25, and the exhaust nozzle.

[0118] It should be understood that the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 can be selectively opened and closed as needed to selectively discharge gas from one or more of the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90. The amount of gas discharged from the first air spring 60, the second air spring 70, the third air spring 80, and the fourth air spring 90 can also be adjusted by opening and closing the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4.

[0119] Figure 19 The eighth operating mode of the closed air suspension system of the present invention is shown, which can be used to detect the state parameters of the air spring. Figure 19 An example of state parameter detection for the first air spring 60 is shown. However, those skilled in the art will understand that one or more of the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, and the fourth solenoid valve V4 may be selectively opened as needed for detection of one or more of the corresponding first air spring 60, second air spring 70, third air spring 80, and fourth air spring 90.

[0120] exist Figure 19 In the eighth operating mode shown, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the fifth solenoid valve V5, the sixth solenoid valve V6, the seventh solenoid valve V7, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the first solenoid valve V1 is in the open state. The first air spring 60 can be connected to the status sensor S through the nineteenth air passage P19, the eighteenth air passage P18, the seventeenth air passage P17, the sixteenth air passage P16, and the twenty-third air passage P23. Therefore, the pressure, temperature, and / or other status parameters of the first air spring 60 can be detected by the status sensor S.

[0121] Figure 20 The ninth operating mode of the closed air suspension system of the present invention is shown, which can be used to detect the status parameters of the air storage chamber 50.

[0122] exist Figure 20 In the ninth operating mode shown, the first solenoid valve V1, the second solenoid valve V2, the third solenoid valve V3, the fourth solenoid valve V4, the seventh solenoid valve V7, the eighth solenoid valve V8, and the ninth solenoid valve V9 are in the closed state, while the fifth solenoid valve V5 and the sixth solenoid valve V6 are in the open state. The gas storage chamber 50 can be connected to the status sensor S via the ninth gas path P9, the eighth gas path P8, the seventh gas path P7, the sixth gas path P6, the fourteenth gas path P14, the fifteenth gas path P15, the sixteenth gas path P16, and the twenty-third gas path P23. Therefore, the pressure, temperature, and / or other status parameters of the gas storage chamber 50 can be detected by the status sensor S.

[0123] The method for manufacturing an air supply device 1 for a closed air suspension system according to the present invention includes the following steps: Each sub-valve body (including upper valve body 21, middle valve body 22 and lower valve body 23) is manufactured by injection molding to form an air passage in each sub-valve body. An upper receiving cavity A11 is formed on the upper valve body 21 and a lower receiving cavity A12 is formed on the middle valve body 22.

[0124] The individual sub-valve bodies are assembled together to form a complete valve body. When the upper valve body 21 and the middle valve body 22 are assembled together, the upper receiving cavity A11 and the lower receiving cavity A12 combine to form a receiving cavity A1 for accommodating the drive mechanism, and the drive mechanism is installed into the receiving cavity A1.

[0125] The aforementioned drive mechanism can be pre-assembled in the factory or installed on the construction site.

[0126] In this invention, the sealing ring can be disposed in the corresponding sealing groove and protrude slightly relative to the sealing groove.

[0127] In this document, when it is mentioned that the air passage is formed in the valve body, it can be understood that the air passage can be formed directly in the valve body 20, or it can be formed in the valve body 20 through the piston housing 127, 128 or other housing provided in the valve body 20, or it can be formed partially directly in the valve body 20 and partially formed in the piston housing 127, 128 or other housing provided in the valve body 20.

[0128] In this article, "longitudinal tilt extension" refers to a situation that extends generally along the longitudinal direction and is at least partially tilted. For example, longitudinal tilt extension can include a situation where the entire structure is tilted or a situation where a section of the structure is tilted.

[0129] Although the invention has been described with reference to preferred embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A valve body configured as an air supply device for a closed air suspension system, wherein an air passage is constructed within the valve body, the air passage connecting a drive mechanism of the air supply device to one or more air springs, wherein, The valve body includes multiple sub-valve bodies stacked on top of each other, and sealing rings are provided on the adjacent surfaces of each sub-valve body to seal the air passage.

2. The valve body according to claim 1, characterized in that, The valve body includes an upper valve body, a middle valve body, and a lower valve body stacked on top of each other, and the air passage includes: A first air passage extends longitudinally within the upper valve body, with its upper end extending to the upper surface of the valve body and communicating with the air inlet, and its lower end communicating with the first piston chamber of the drive mechanism. A second air passage extends longitudinally within the valve body, the upper end of which is connected to the first piston chamber. A one-way valve is provided in the second air passage so that gas can only flow in the direction from the first piston chamber to the second air passage. A third air passage extends laterally on the upper surface of the lower valve body, and one end of the third air passage is connected to the lower end of the second air passage. A fourth air passage extends longitudinally and obliquely within the upper and middle valve bodies, the lower end of which is connected to the other end of the third air passage. The fifth air passage extends longitudinally and obliquely within the upper valve body, and the upper ends of the fourth air passage and the fifth air passage are connected to the drying box. A slot extending laterally on the lower surface of the upper valve body forms a sixth air passage when the upper valve body and the middle valve body are assembled together. One end of the sixth air passage is connected to the lower end of the fifth air passage. A seventh air passage extends longitudinally within the valve body, and the upper end of the seventh air passage is connected to the sixth air passage. An eighth air passage extends laterally on the upper surface of the lower valve body, one end of which is connected to the lower end of the seventh air passage. A fifth solenoid valve is installed at the connection between the seventh and eighth air passages. A ninth air passage extends longitudinally within the upper and middle valve bodies. The lower end of the ninth air passage is connected to the other end of the eighth air passage, and the upper end extends to the upper surface of the valve body and is connected to the air storage chamber of the closed air suspension system.

3. The valve body according to claim 2, characterized in that, A waist-shaped first sealing ring is provided on the outer surface of the mating surface of the middle valve body. When the middle valve body is assembled with the upper valve body, the first sealing ring can ensure the sealing between the mating surface and the slot.

4. The valve body according to claim 2 or 3, characterized in that, The one or more air springs include a first air spring, a second air spring, a third air spring, and a fourth air spring, and the air passage further includes: The fourteenth air passage extends longitudinally within the middle valve body, and the upper end of the fourteenth air passage is connected to the other end of the sixth air passage. A fifteenth air passage extends laterally on the upper surface of the lower valve body. One end of the fifteenth air passage is connected to the lower end of the fourteenth air passage. A sixth solenoid valve is installed at the connection between the fifteenth air passage and the fourteenth air passage. A sixteenth air passage extends laterally on the upper surface of the lower valve body, and one end of the sixteenth air passage is connected to one end of the fifteenth air passage; A seventeenth air passage extends laterally on the upper surface of the lower valve body, one end of which is connected to the middle of the sixteenth air passage, and the seventeenth air passage crosses below the first piston chamber; The eighteenth air passage extends laterally on the upper surface of the lower valve body, and the other end of the seventeenth air passage is connected to the middle of the eighteenth air passage; The nineteenth air passage extends longitudinally within the upper valve body and the middle valve body. The lower end of the nineteenth air passage is connected to one end of the eighteenth air passage, and the upper end is connected to the first air spring. A first solenoid valve is installed at the connection between the nineteenth air passage and the eighteenth air passage. The twentieth air passage extends longitudinally within the upper valve body and the middle valve body. The lower end of the twentieth air passage is connected to the other end of the eighteenth air passage, and the upper end is connected to the second air spring. A second solenoid valve is installed at the connection between the twentieth air passage and the eighteenth air passage. The 21st air passage extends longitudinally within the upper valve body and the middle valve body. The lower end of the 21st air passage is connected to the other end of the 16th air passage, and the upper end is connected to the third air spring. A third solenoid valve is installed at the connection between the 21st air passage and the 16th air passage. A 22nd air passage extends longitudinally within the upper and middle valve bodies. The lower end of the 22nd air passage is connected to one end of the 16th air passage, and the upper end is connected to the fourth air spring. A fourth solenoid valve is installed at the connection between the 22nd and 16th air passages.

5. The valve body according to claim 4, characterized in that, The gas path also includes: A tenth air passage extends laterally on the upper surface of the lower valve body, one end of which is connected to one end of the eighth air passage and the lower end of the seventh air passage. The eleventh air passage extends longitudinally within the valve body. The lower end of the eleventh air passage is connected to the other end of the tenth air passage, and the other end is connected to the second piston chamber of the drive mechanism. The twelfth air passage extends longitudinally within the middle valve body, and its upper end is connected to the second piston chamber. A thirteenth air passage extends laterally on the upper surface of the lower valve body. One end of the thirteenth air passage is connected to the lower end of the twelfth air passage, and the other end is connected to the other end of the third air passage.

6. The valve body according to claim 5, characterized in that, The gas path also includes: The 24th air passage extends longitudinally within the middle valve body. The lower end of the 24th air passage is connected to the middle of the 17th air passage, and the upper end is connected to the first piston chamber.

7. The valve body according to claim 5 or 6, characterized in that, The gas path also includes: A second thirteenth air passage extends laterally on the upper surface of the lower valve body. One end of the second thirteenth air passage is connected to the other end of the sixteenth air passage, and a status sensor is installed at the other end. The status sensor is configured to detect the status parameters of the first air spring, the second air spring, the third air spring, the fourth air spring, and / or the air storage chamber.

8. The valve body according to any one of claims 5 to 7, characterized in that, The gas path also includes: The second fifth air passage extends longitudinally within the middle valve body and the upper valve body. The lower end of the second fifth air passage is connected to the middle of the third air passage, and the upper end of the second fifth air passage extends to the upper surface of the valve body to communicate with the environment.

9. The valve body according to any one of claims 1 to 8, characterized in that, The sub-valve body includes a lower valve body, and the air passage on the lower valve body includes a first air passage combination, a second air passage combination, and a third air passage combination. A second sealing ring is provided on the upper surface of the lower valve body to surround the first air passage combination, the second air passage combination, and the third air passage combination. A third sealing ring surrounding the second air passage assembly is provided on the upper surface of the lower valve body. A fourth sealing ring is provided on the upper surface of the lower valve body to surround the third air passage assembly.

10. An air supply device for a closed air suspension system, comprising a valve body according to any one of claims 1 to 9.

Images