An out-of-vehicle air supply device based on a vehicle-mounted central air source

Abstract

This invention relates to the field of in-vehicle gas tank installation technology, and in particular to an external gas supply device based on an on-board central gas source. The device includes an on-board central gas source with a solenoid valve interface and multiple gas supply holes; an installation assembly comprising a storage tank, an inlet pipe and an outlet pipe at both ends of the storage tank (the inlet pipe communicates with the gas supply holes), a fixing block on the outer wall of the inlet and outlet pipes, a piston rod on the outer wall of the fixing block, a welding block on the outer wall of the piston rod, the welding block being fixed to a truss within the vehicle frame, and a gas pipe connecting the welding block and the storage tank; and a shock-absorbing assembly comprising a two-way gas valve inside the welding block and a first elastic element between the welding block and the fixing block. This invention utilizes air pressure to lift the storage tank, creating variable damping between the piston and the two-way gas valve. During road impacts, the restricted gas flow and the elastic element work together to absorb energy, reducing shock while avoiding stress at the weld points.

Description

Technical Field

[0001] This invention relates to the field of in-vehicle gas cylinder installation technology, and in particular to an external gas supply device based on an on-board central gas source. Background Technology

[0002] With the increasing demands for intelligent, electric, and off-road performance in automobiles, vehicles are becoming increasingly reliant on compressed air systems. Traditional vehicle air supply systems often employ a decentralized layout, with each air-using subsystem (such as air suspension, seat adjustment, central tire inflation / deflation, and sensor cleaning) typically equipped with an independent small air compressor or high-pressure cylinder. While this structure has a clear function, it suffers from problems such as heavy weight, complex piping, high energy consumption, and difficult maintenance, making it difficult to meet the modern trends of lightweighting, integration, and intelligence in vehicles.

[0003] In recent years, vehicle-mounted central air supply systems have gradually gained attention as an alternative solution. This system centrally generates clean compressed air using efficient devices such as oil-free scroll air compressors and distributes it to various air-using terminals via a solenoid valve control module. It boasts advantages such as compact structure, stable output, fast response, and maintenance-free operation. Currently, central air supply systems are mostly used in high-end off-road vehicles or special vehicles to achieve functions such as tire inflation / deflation and air suspension adjustment. However, in practical applications, their external air supply capacity has not been fully expanded, especially in scenarios such as emergency rescue, outdoor operations, and high-altitude oxygen production, where efficient, safe, and controllable external air supply interfaces are lacking.

[0004] Furthermore, existing central gas supply systems mostly use rigid installation for their gas storage modules, lacking an effective buffer structure between the gas tank and the vehicle frame. This leads to stress concentration under complex road conditions, posing risks such as weld cracking and connection failure. Additionally, the gas outlet pipeline control method is simple and cannot automatically open and close based on pressure changes, easily resulting in gas waste or ineffective output, affecting system efficiency and safety. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an external air supply device based on a vehicle-mounted central air source, which includes a solenoid valve interface in the vehicle-mounted central air source and a plurality of air supply holes in the solenoid valve interface. The installation components include a storage tank, an air inlet pipe and an air outlet pipe located at both ends of the storage tank, the air inlet pipe communicating with the air supply port, a fixing block located on the outer wall of the air inlet pipe and the air outlet pipe, a piston rod located on the outer wall of the fixing block, a welding block located on the outer wall of the piston rod, the welding block being fixed on a truss inside the vehicle frame, and an air pipe for connecting the welding block and the storage tank. The shock absorption assembly includes a bidirectional air valve located inside the welded block and a first elastic element located between the welded block and the fixed block.

[0007] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: a hemispherical plug is rotatably provided inside the air outlet pipe, and an intercepting cylinder is provided inside the air outlet pipe.

[0008] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, a second elastic element is provided between the intercepting cylinder and the inner wall of the air outlet pipe.

[0009] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: the outer wall of the hemispherical plug is provided with a connecting rod, one end of the connecting rod extends to the outside of the air outlet pipe, and the end of the connecting rod away from the hemispherical plug is rotatably provided with a first sleeve. The inner wall of the first sleeve is provided with a first sliding groove, and the outer wall of the connecting rod is provided with a first slider that can slide along the inside of the first sliding groove.

[0010] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: both ends of the fixed block are provided with piston rods, the outer wall of the welded block is recessed inward to form a second sliding groove for the piston rods to slide, and the second sliding groove penetrates the welded block, and the air pipe is connected to the inside of the second sliding groove.

[0011] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: a second sleeve is sleeved on the outer wall of the piston rod, one end of the first elastic element is connected to the second sleeve, and the other end is connected to the welding block.

[0012] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: the inner wall of the second sleeve is provided with a limiting groove, and the outer wall of the piston rod is provided with a second slider that can slide along the inside of the limiting groove.

[0013] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: the limiting groove includes a flared opening and a spiral groove; The spiral groove includes a left point, a right point, and a slot.

[0014] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, the bidirectional air valve includes a blocking block, the blocking block includes a first movable channel and a second movable channel, the inner wall of the first movable channel is provided with a third elastic member, the other end of the third elastic member is connected to a ball plug, and the connection between the first movable channel and the second movable channel is chamfered to form a first inclined surface that can abut against the ball plug.

[0015] As a preferred embodiment of the vehicle external air supply device based on the vehicle central air source of the present invention, wherein: multiple first and second active channels are arrayed, and the number of second active channels facing the welding block is greater than the number facing the air pipe.

[0016] The beneficial effects of this invention are as follows: This invention utilizes air pressure to lift the storage tank, enabling the piston-bidirectional air valve to form variable damping. When the road surface is impacted, the gas flow is restricted and the elastic element works together to absorb energy, reducing shock and avoiding stress on the weld points. When the air pressure decreases and the storage tank falls, the hemispherical plug automatically closes the air outlet pipe to prevent ineffective exhaust, thereby improving gas usage efficiency and system lifespan. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the vehicle-mounted central air source structure in this invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a top view of the overall structure of the present invention; Figure 4 In this invention Figure 3 Schematic diagram of the cross-sectional structure of the middle BB section; Figure 5 In this invention Figure 3 A schematic diagram of the structure of one end of the air outlet pipe in the CC cross-section; Figure 6 This is a schematic diagram of the cross-sectional structure of the first sleeve in this invention; Figure 7 This is a schematic diagram of the piston rod structure in this invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the second sleeve in this invention; Figure 9 This is a schematic cross-sectional view of the bidirectional air valve structure in this invention.

[0019] In the diagram: A. Vehicle-mounted central air source; A1. Solenoid valve interface; A11. Air supply port; 1. Mounting assembly; 11. Storage tank; 111. Air inlet pipe; 112. Air outlet pipe; 12. Fixing block; 13. Piston rod; 14. Welding block; 141. Second slide groove; 15. Air pipe; 16. Hemispherical valve; 161. Connecting rod; 1611. First slider; 17. Interception cylinder; 18. Second elastic element; 19. First sleeve; 191. First slide groove; 2. Shock absorption assembly; 21. Two-way air valve; 211. Blocking block; 2111. First movable channel; 2112. Second movable channel; 2113. First inclined surface; 22. First elastic element; 23. Second sleeve; 231. Limiting groove; 2311. Trumpet mouth; 2312. U-shaped groove; 2313. Left side point; 2314. Right side point; 2315. Slot. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0022] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0023] Example 1 Reference Figures 1-5 This is the first embodiment of the present invention, which provides an external air supply device based on a vehicle-mounted central air source.

[0024] Specifically, the vehicle-mounted central air source A includes a solenoid valve interface A1, and the solenoid valve interface A1 includes multiple air supply ports A11. The installation assembly includes a storage tank 11, an air inlet pipe 111 and an air outlet pipe 112 located at both ends of the storage tank 11, the air inlet pipe 111 being connected to the air supply port A11, a fixing block 12 located on the outer wall of the air inlet pipe 111 and the air outlet pipe 112, a piston rod 13 located on the outer wall of the fixing block 12, a welding block 14 located on the outer wall of the piston rod 13, the welding block 14 being fixed on the truss inside the frame, and an air pipe 15 for connecting the welding block 14 and the storage tank 11. The shock-absorbing component 2 includes a two-way air valve 21 located inside the welding block 14 and a first elastic element 22 located between the welding block 14 and the fixed block 12.

[0025] The vehicle-mounted central air source A is a device that provides stable and clean compressed air to multiple air-using subsystems inside the vehicle through an oil-free scroll air compressor and other devices. In this scheme, the vehicle-mounted central air source A provides compressed air to the storage tank 11. One end of the storage tank 11 is equipped with an inlet pipe 111, and the other end is equipped with an outlet pipe 112. The inlet pipe 111 is connected to the air supply hole A11 on the outer wall of the solenoid valve interface A1 through an air pipe 15. The solenoid valve interface A1 controls the opening and closing of the air supply hole A11 through a solenoid valve, thereby controlling the gas supply to the storage tank 11. The outlet pipe 112 is connected to an external air-using structure, such as an external air filling gun. Fixing blocks 12 are fixedly connected to the outer walls of both the inlet pipe 111 and the outlet pipe 112. A piston rod 13 is connected below the fixing blocks 12. A piston is fixedly connected to the lower end of the piston rod 13, and a welding block 14 is slidably connected to the lower end of the piston rod 13. It should be noted that the welding block 14 here serves as a supporting carrier, welded to the truss of the inner wall of the automobile frame. Simultaneously, the welding block 14 is connected to the interior of the storage tank 11 via an air pipe 15 below it. That is, the air pressure inside the storage tank 11 is synchronized with the air pressure inside the welding block 14. Furthermore, the piston at the lower end of the piston rod 13 can slide inside the welding block 14. The advantage of this design is that when the air pressure inside the storage tank 11 begins to rise, the air pressure pushes against the piston rod 13, simultaneously supporting the storage tank 11. Additionally, a two-way air valve 21 is fixedly installed inside the welding block 14. The function of the two-way air valve 21 is to achieve bidirectional airflow while reducing the cross-sectional area of ​​the airflow, i.e., the cross-sectional area of ​​the airflow is smaller than the cross-sectional area of ​​the piston sliding. One end of the first elastic element 22 is fixedly connected to the surface of the welding block 14, and the other end is fixedly connected to the surface of the fixed block 12. The first elastic element 22 is a compression spring.

[0026] During installation, welding block 14 is welded to the frame truss. Then, piston rods 13 below the fixing blocks 12 at both ends of storage tank 11 are inserted into welding block 14. Next, the first elastic element 22 is welded. Compressed air is then supplied to storage tank 11 via the vehicle's central air source A. As the air pressure increases, the increased internal pressure of storage tank 11 creates a lifting force on storage tank 11 and a pulling force on the first elastic element 22. When the vehicle encounters uneven road surfaces, the vehicle vibrates. Since storage tank 11 is not welded to the frame, this vibration causes the storage tank 11 to vibrate, reducing stress at the weld and preventing breakage. Simultaneously, when storage tank 11 vibrates upwards, the piston rod 13 moves upwards. At this time, the fixing blocks 12 stretch the first elastic element 22. The upward movement of the piston rod 13... The space between the plug and the two-way valve 21 will increase, causing the gas below the two-way valve 21 to surge upwards. Since the sliding cross section of the piston rod 13 is larger than the air passage cross section of the valve, it will limit the gas flow rate per unit time, forming a buffering effect in conjunction with the first elastic element 22. Similarly, when the fluctuation is small, the piston rod 13 moves downwards using the weight of the storage tank 11. The piston rod 13 pushes the internal gas to surge downwards towards the two-way valve 21. Since the gas flow rate per unit time is smaller, it will create a certain resistance, slowing down the falling speed. The two-way valve 21 and the first elastic element 22 work together to achieve buffering, reducing the damage to the storage tank 11 caused by fluctuations. At the same time, the internal air pressure of the storage tank 11, combined with the weight of the storage tank 11, forms a balance, which can both realize the installation of the storage tank 11 and achieve its own shock absorption.

[0027] Example 2 Reference Figures 1-9 This is the second embodiment of the present invention, which is implemented based on the previous embodiment.

[0028] Specifically, a hemispherical plug 16 is provided inside the vent pipe 112, and an intercepting cylinder 17 is provided inside the vent pipe 112.

[0029] A hemispherical plug 16 is rotatably installed inside the vent pipe 112. At the same time, an intercepting cylinder 17 is slidably installed on the side of the hemispherical plug 16 near the inside of the storage tank 11. An annular sealing gasket is fixedly installed on the outer surface of the intercepting cylinder 17. During installation, the annular sealing gasket is squeezed by the inner wall of the vent pipe 112 and the outer wall of the intercepting cylinder 17, thereby making it fit more closely to the inner wall of the vent pipe 112 and the outer wall of the intercepting cylinder 17, thus achieving a seal. Meanwhile, one end of the intercepting cylinder 17 fits against the outer wall of the hemispherical plug 16, and the hemispherical plug 16 can block the intercepting cylinder 17, thereby closing the vent pipe 112.

[0030] Preferably, a second elastic element 18 is provided between the interceptor cylinder 17 and the inner wall of the vent pipe 112.

[0031] A second elastic element 18 is fixedly installed between the intercepting cylinder 17 and the inner wall of the vent pipe 112. One end of the second elastic element 18 is fixedly connected to the intercepting cylinder 17, and the other end is fixedly connected to the inner wall of the vent pipe 112. When the hemispherical plug 16 is rotated, if the intercepting cylinder 17 is displaced, it can be adjusted by the second elastic element 18, so that it can be re-fitted to the outer surface of the hemispherical plug 16, thereby re-blocking the vent pipe 112.

[0032] The outer wall of the hemispherical plug 16 is provided with a connecting rod 161. One end of the connecting rod 161 extends to the outside of the air outlet pipe 112, and the end of the connecting rod 161 away from the hemispherical plug 16 is rotatably provided with a first sleeve 19. The inner wall of the first sleeve 19 is provided with a first sliding groove 191, and the outer wall of the connecting rod 161 is provided with a first slider 1611 that can slide along the inside of the first sliding groove 191.

[0033] The hemispherical plug 16 is a hemisphere with its surface covered by a soft material to ensure sealing. A connecting rod 161 is fixedly installed on one side of the hemispherical plane. The connecting rod 161 extends into an exhaust pipe 112 towards the welding block 14, and the connecting rod 161 and the exhaust pipe 112 are connected by a bearing to enable the rotation of the connecting rod 161. The first sleeve 19 and the welding block 14 are detachably installed by screw connection. The welding block 14 is welded to the truss. When installing the storage tank 11, the first sleeve 19 can be rotated synchronously to install the first sleeve 19 on the surface of the welding block 14. The inner wall surface of the first sleeve 19 is provided with a first sliding groove 191, which is a spiral groove. When the first slider 1611 fixed to the outer wall of the connecting rod 161 slides along the inside of the first sliding groove 191, it will drive the connecting rod 161 to rotate.

[0034] Preferably, the fixed block 12 is provided with piston rods 13 at both ends, and the outer wall of the welding block 14 is recessed inward to form a second sliding groove 141 for the piston rods 13 to slide, and the second sliding groove 141 passes through the welding block 14, and the air pipe 15 is connected to the inside of the second sliding groove 141.

[0035] The fixing block 12 is fixedly connected to the upper surface of the air inlet pipe 111 and the air outlet pipe 112, and extends to both ends. Piston rods 13 are connected at both ends of the fixing block 12. Meanwhile, the second sliding groove 141 passes through the welding block 14, allowing the piston rods 13 to slide inside. The advantage of this design is that it increases the number of support points and stabilizes the installation of the storage tank 11.

[0036] The advantage of this design is that by using both ends of the fixed block 12 to support the storage tank 11, it is equivalent to having support force at both ends of the fixed block 12. Through the two fulcrums, balance can be achieved, preventing the storage tank 11 from shifting. Simultaneously, an intercepting cylinder 17 is installed inside the vent pipe 112, which, together with the hemispherical plug 16, enables the opening and closing of the vent pipe 112. After installation, when high-pressure gas forms inside the storage tank 11, it will lift the piston rod 161 upwards a certain distance. Simultaneously, the connecting rod 161 will slide upwards, and the first slider 1611 on the outer wall of the connecting rod 161 will slide along the inside of the first sliding groove 191. At this time, the hemispherical plug 16 will... The interceptor cylinder 17 opens to the side, and the exhaust pipe 11 opens. When the internal gas is consumed to a certain extent, the pressure decreases, and the weight of the storage tank 11 decreases only slightly. Therefore, under the influence of gravity, the storage tank 11 begins to slide downwards. At the same time, the first slider 1611 on the outer wall of the connecting rod 161 slides along the inside of the first sliding groove 191, which then drives the hemispherical plug 16 to rotate. Subsequently, the interceptor cylinder 17 is closed, and the exhaust pipe 112 of the storage tank 11 is shut off. The internal pressure decreases, and the output gas pressure is insufficient, resulting in ineffective gas. Therefore, the exhaust pipe 112 is closed at this time to avoid the discharge of ineffective gas and the waste of gas source. Then, the internal air pressure is judged by the sensor and fed back to the vehicle central air source A, which then replenishes the internal gas. The air pressure increases, the supporting force on the piston rod 13 increases, and the storage tank 11 is lifted a distance again. Then, the hemispherical plug 16 opens, and effective gas can continue to be released.

[0037] Example 3 Reference Figures 1-9 This is the third embodiment of the present invention, which is implemented based on the previous embodiment.

[0038] Specifically, a second sleeve 23 is fitted on the outer wall of the piston rod 13, and one end of the first elastic element 22 is connected to the second sleeve 23, while the other end is connected to the welding block 14.

[0039] The second sleeve 23 is disposed between the fixed block 12 and the welding block 14, and can be sleeved on the outer surface of the piston rod 13. Meanwhile, one end of the first elastic element 22 is fixedly connected to the outer wall of the second sleeve 23, and the other end is fixedly connected to the outer wall of the welding block 14. At the same time, the piston rod 13 can slide through the second sleeve 23 along the inside of the second sliding groove 141. Simultaneously, the piston rod 13 can slide up and down together with the second sleeve 23.

[0040] Furthermore, the inner wall of the second sleeve 23 is provided with a limiting groove 231, and the outer wall of the piston rod 13 is provided with a second slider 131 that can slide along the inside of the limiting groove 231.

[0041] The inner wall of the second sleeve 23 is provided with a limiting groove 231. When the piston rod 13 passes through the second sleeve 23, the second slider 131 fixed on the outer wall of the piston rod 13 will be inserted into the limiting groove 231, so as to connect the piston rod 13 with the second sleeve 23. In this scheme, the piston rod 13 is rotatably connected to the fixed block 12.

[0042] Preferably, the limiting groove 231 includes a flared opening 2311 and a spiral groove 2312; The groove 2312 includes a left point 2313, a right point 2314, and a slot 2315.

[0043] Among them, such as Figure 8 As shown, the limiting groove 231 includes a flared opening 2311 and a sliding groove that opens to both sides. The flared opening 2311 connects the loop groove 2312 to the outside. There are two limiting grooves 231, with the two flared openings 2311 interconnected on both sides. The advantage of this design is that when the second slider 131 passes through the second sleeve 23, the second slider 131 slides along the inner wall of the flared opening 2311 and then falls into the loop groove 2312, facilitating installation without requiring special alignment. Furthermore, as... Figure 8As shown, the loop groove 2312 includes a left-side point 2313 offset to the left, a right-side point 2314 offset to the left, and an upward-offset slot 2315. The advantage of this design is that when the second slider 131 slides into the loop groove 2312 along the inner wall of the flared opening 2311, it slides along the right side and then slides into the right-side point 2314. Because the point is slightly offset to the left, when the piston rod 13 slides upward, it moves along the inner wall of the loop groove 2312 towards the slot 2315. When the piston rod 13 moves downward, it moves towards the left-side point 2313. Then, when it slides upward again, it returns to the flared opening 2311, thus disengaging the piston rod 13 from the second sleeve 23. That is, during installation, the second slider 131 on the outer wall of the piston rod 13 slides along the flared opening 2311... The cylinder slides into point 2314 on the right side and then begins to inflate the storage tank 11. As the air pressure increases, it pushes the piston rod 13 upward. Then, the second slider 131 slides into the slot 2315. Due to the pulling force of the first elastic element 22, the second sleeve 23 has a downward force, and the piston rod 13 has an upward force pulling the second sleeve 23, forming a pull and connecting the second sleeve 23 with the piston rod 13. The advantage of this design is that it replaces the first elastic element 22 and directly connects to the outer surface of the welding block 14 and the fixing block 12. During maintenance, the storage tank 11 can be disassembled. If the storage tank 11 leaks or is damaged, the storage tank 11 can be disassembled or individual components such as the two-way air valve 21 can be replaced. This avoids hard disassembly, which would make maintenance and component replacement difficult. It should be noted that when the internal air pressure of the storage tank 11 decreases, after the air outlet pipe 112 is closed, the storage tank 11 will not fall to the point 2313 on the left side. Only when maintenance or replacement of parts is required, the internal air pressure of the storage tank 11 is released, and then the storage tank 11 falls, causing the second slider 131 on the outer wall of the piston rod 13 to slide to the point 2313 on the left side. Then the first sleeve 19 is removed, and the storage tank 11 is lifted up to replace or maintain other parts of the storage tank 11.

[0044] The two-way air valve 21 includes a blocking block 211, which includes a first movable channel 2111 and a second movable channel 2112. The inner wall of the first movable channel 2111 is provided with a third elastic element 24, and the other end of the third elastic element 24 is connected to a ball plug 25. The connection between the first movable channel 2111 and the second movable channel 2112 is chamfered to form a first inclined surface 2113 that can abut against the ball plug 25.

[0045] The blocking block 211 is a cylindrical structure and is fixed to the inner wall of the second slide groove 141. The first movable channel 2111 and the second movable channel 2112 are both cylindrical through holes, and the radius of the first movable channel 2111 is larger than that of the second movable channel 2112. A third elastic element 24 is provided on the inner wall of the first movable channel 2111. The third elastic element 24 is a conical spring, and a ball plug 25 is fixedly connected to the other end of the third elastic element 24. At the same time, it can abut against the first inclined surface 2113 at the connection of the first movable channel 2111 and the second movable channel 2112 to form a one-way gas channel.

[0046] Multiple first active channels 2111 and second active channels 2112 are arranged in an array, and the number of second active channels 2112 facing the welding block 14 is greater than the number facing the air pipe 15.

[0047] The array includes multiple first active channels 2111 and second active channels 2112. The second active channel 2112 faces the welding block 14, and the ball plug 25 is located at the end closest to the welding block 14. That is, gas can only flow through the storage tank 11 to the upper end of the blocking block 211, and conversely, it can only flow through the upper end of the blocking block 211 to the lower end, thereby realizing gas exchange between the upper and lower ends of the bidirectional gas valve 21. At the same time, when the gas flows upward, the cross-section it passes through is larger than the cross-section it flows downward.

[0048] The advantage of this design is that the shock absorption component 2 can be disassembled and assembled, which facilitates subsequent maintenance or disassembly. At the same time, when encountering fluctuations, since the first elastic element 22 already has tension, the upward flow of gas will be smoother than the downward flow of gas. This reduces the upward resistance when encountering fluctuations, preventing the connection from breaking due to sudden upward tension. In addition, the gas flow is smaller when falling, preventing the components from separating due to inertia from falling too violently.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An external air supply device based on a vehicle-mounted central air source, characterized in that: The vehicle-mounted central air source (A) includes a solenoid valve interface (A1), and the solenoid valve interface (A1) includes multiple air supply ports (A11). The mounting assembly (1) includes a storage tank (11), an air inlet pipe (111) and an air outlet pipe (112) located at both ends of the storage tank (11), a fixing block (12) located on the outer wall of the air inlet pipe (111) and the air outlet pipe (112), a piston rod (13) located on the outer wall of the fixing block (12), a welding block (14) located on the outer wall of the piston rod (13), and an air pipe (15) for connecting the welding block (14) and the storage tank (11). The welding block (14) is fixed to the truss inside the frame; The air intake pipe (111) is connected to the air supply port (A11); The shock absorption assembly (2) includes a two-way air valve (21) disposed inside the welding block (14) and a first elastic member (22) disposed between the welding block (14) and the fixed block (12). The vent pipe (112) is provided with a hemispherical plug (16) inside, and the vent pipe (112) is provided with an intercepting cylinder (17). A second elastic element (18) is provided between the interceptor tube (17) and the inner wall of the outlet pipe (112). The outer wall of the hemispherical plug (16) is provided with a connecting rod (161), one end of the connecting rod (161) extends to the outside of the air outlet pipe (112), and the end of the connecting rod (161) away from the hemispherical plug (16) is rotatably provided with a first sleeve (19). The inner wall of the first sleeve (19) is provided with a first sliding groove (191), and the outer wall of the connecting rod (161) is provided with a first slider (1611) that can slide along the inside of the first sliding groove (191). Both ends of the fixed block (12) are provided with piston rods (13), and the outer wall of the welding block (14) is recessed inward to form a second sliding groove (141) for the piston rod (13) to slide. The second sliding groove (141) passes through the welding block (14), and the air pipe (15) is connected to the inside of the second sliding groove (141). The piston rod (13) is fitted with a second sleeve (23) on its outer wall. One end of the first elastic element (22) is connected to the second sleeve (23), and the other end is connected to the welding block (14).

2. The vehicle external air supply device based on a vehicle-mounted central air source as described in claim 1, characterized in that: The inner wall of the second sleeve (23) is provided with a limiting groove (231), and the outer wall of the piston rod (13) is provided with a second slider (131) that can slide along the inside of the limiting groove (231).

3. The vehicle external air supply device based on a vehicle-mounted central air source as described in claim 2, characterized in that: The limiting groove (231) includes a flared opening (2311) and a spiral groove (2312). The groove (2312) includes a left point (2313), a right point (2314), and a slot (2315).

4. The vehicle external air supply device based on a vehicle-mounted central air source as described in claim 3, characterized in that: The bidirectional air valve (21) includes a blocking block (211), which includes a first movable channel (2111) and a second movable channel (2112). The inner wall of the first movable channel (2111) is provided with a third elastic element (24), and the other end of the third elastic element (24) is connected to a ball plug (25). The connection between the first movable channel (2111) and the second movable channel (2112) is chamfered to form a first inclined surface (2113) that can abut against the ball plug (25).

5. The vehicle external air supply device based on a vehicle-mounted central air source as described in claim 4, characterized in that: The first active channel (2111) and the second active channel (2112) are each arrayed with multiple channels, and the number of the second active channels (2112) facing the welding block (14) is greater than the number facing the air pipe (15).

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