Housing, air pump, air suspension, and vehicle

Abstract

Provided are a housing (10), an air pump (100), an air suspension, and a vehicle. The housing (10) is used in the air pump (100). The housing (10) is provided with a central hole (11), five cylinder holes (12), five transmission air channels (13), and an air output channel (14), wherein each of the cylinder holes (12) is configured to receive an air cylinder (20); each of the transmission air channels (13) is configured for communication with two adjacent cylinder holes (12), and the five transmission air channels (13) and the five cylinder holes (12) jointly form an annular air channel connected end-to end; and the air output channel (14) is in communication with any one of the transmission air channels (13) and the external space. The air pump (100) with the housing (10) has high pumping efficiency.

Description

Housing, air pump, air suspension and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 22, 2023, with application number 202311791977.5 and invention name “Housing, Air Pump, Air Suspension and Vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present invention relates to the technical field of pistons, and in particular to a housing, an air pump, an air suspension and a vehicle. Background Art

[0003] The air suspension is composed of elastic elements, shock absorbers, guide mechanisms and other components. It is responsible for connecting the car body, chassis and wheels, transmitting their interacting forces and torques, and alleviating the impact from the road surface, which can significantly improve driving comfort and handling. Technical issues

[0004] During operation of the existing air suspension, the air pump has low air pumping efficiency. Technical Solutions

[0005] The purpose of the present invention is to provide a housing, an air pump, an air suspension and a vehicle to solve the problem of low air pumping efficiency.

[0006] To achieve the purpose of the present invention, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a housing for an air pump, wherein the housing is provided with:

[0008] Center hole;

[0009] five cylinder holes, one end of each of the five cylinder holes being connected to the central hole, the five cylinder holes being spaced apart in the circumferential direction of the central hole, and the cylinder holes being used to accommodate cylinders;

[0010] Five transmission air passages, each of the transmission air passages being used to connect two adjacent cylinder holes, the five transmission air passages being arranged along the circumference of the central hole, and the five transmission air passages and the five cylinder holes together forming an annular air passage connected end to end;

[0011] The air outlet channel is connected to any of the transmission air channels and the external space.

[0012] In one embodiment, the five cylinder holes are centrally symmetrical.

[0013] In one embodiment, the five transmission airways are centrally symmetrical.

[0014] In one embodiment, the inner wall surface of the cylinder hole and the inner wall surface of the center hole are smoothly transitioned.

[0015] In one embodiment, the shell is further provided with five matching holes, which are connected to the five cylinder holes in a one-to-one correspondence. The matching holes are located at one end of the cylinder hole away from the center hole, and are used to accommodate the cover body.

[0016] In one embodiment, the shell is adapted to be detachably connected to the cover.

[0017] In one embodiment, the shell is further provided with a receiving hole, and the receiving hole is used to install a plurality of solenoid valves, and the plurality of solenoid valves are correspondingly connected to the five transmission air channels, and the solenoid valves are used to control the gas flow in the transmission air channels.

[0018] In a second aspect, the present invention provides an air pump comprising:

[0019] The housing according to any one of the first aspects;

[0020] The five cylinders are accommodated in the five cylinder holes in a one-to-one correspondence.

[0021] In one embodiment, the air pump further includes a drive assembly, the drive assembly extends into the central hole, and the five cylinders are all connected to the drive assembly.

[0022] In one embodiment, the driving assembly includes a connecting rod shaft and an eccentric wheel, the eccentric wheel is connected to the connecting rod shaft, the connecting rod shaft extends into the center hole, and the five cylinders are all rotatably connected to the connecting rod shaft.

[0023] In one embodiment, the air pump further includes a fastening assembly connected to the five cylinders, and the fastening assembly is used to fix the cylinders in the radial direction of the connecting rod shaft.

[0024] In one embodiment, the cylinder includes a piston rod and a hook, the piston rod is rotatably connected to the connecting rod shaft, the hook is connected to the piston rod and forms a slot, and the opening of the slot faces away from the connecting rod shaft;

[0025] The fastening assembly includes a snap ring, which extends along the circumference of the connecting rod shaft and is received in the snap groove.

[0026] In one embodiment, the air pump further includes a bearing, the bearing including an outer ring and an inner ring that are rotatably connected, the inner ring is sleeved on the connecting rod shaft and fixedly connected, and the outer ring is connected to the piston rod.

[0027] In one embodiment, the piston rod includes a rod body and a connecting portion, wherein the connecting portion is connected to an end of the rod body, the connecting portion is connected to the outer ring, and the hook is connected to the rod body and / or the connecting portion;

[0028] A connecting groove is formed on a surface of the connecting portion facing away from the rod body, and the outer ring is received in the connecting groove.

[0029] In one embodiment, the opening of the connecting groove faces the connecting rod shaft, and the bottom wall surface of the connecting groove is an arc surface.

[0030] In one embodiment, the connecting rod shaft and the eccentric wheel are connected by any one of screw connection, clamping connection and welding.

[0031] In one embodiment, the cylinder includes a cylinder body and a leather cup, the leather cup is arranged in the cylinder body, the end of the piston rod away from the connecting rod shaft is connected to the leather cup, and the leather cup is slidably connected to the cylinder body.

[0032] In one embodiment, the shell is made of any one of metal materials, high-strength plastics, and ceramics.

[0033] In a third aspect, the present invention provides an air suspension comprising an elastic element and an air pump as described in any one of the second aspects, wherein the air pump is used to compress the elastic element.

[0034] In a fourth aspect, the present invention provides a vehicle comprising an axle, a frame and the air suspension as described in the third aspect, wherein the air suspension is used to connect the axle and the frame. Beneficial effects

[0035] The shell of the air pump of the present invention is provided with five cylinder holes and a transmission air channel connecting two adjacent cylinder holes. There are five cylinders in the five cylinder holes. When the air pump is moving, the gas generated by the five cylinders is collected through the five transmission air channels and the five cylinder holes to form an annular air channel connected end to end and output through the air outlet channel connected to the external space and the transmission air channel, which greatly improves the working efficiency and inflation efficiency of the air pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] FIG1 is a cross-sectional view of an air pump according to an embodiment;

[0038] FIG2 is a perspective view of an air pump according to an embodiment;

[0039] FIG3 is a partial structural perspective view of an air pump according to an embodiment;

[0040] FIG4 is an exploded view of a partial structure of an air pump according to an embodiment;

[0041] FIG. 5 is a perspective view of a cylinder according to an embodiment.

[0042] Explanation of the reference numerals: 100-air pump, 10-housing, 11-center hole, 12-cylinder hole, 13-transmission air channel, 14-air outlet channel, 15-matching hole, 16-receiving hole, 20-cylinder, 21-piston rod, 211-rod body, 212-connecting part, 2121-connecting groove, 22-hook, 23-slot, 24-cylinder body, 25-leather cup, 26-cylinder head, 30-drive assembly, 31-connecting rod shaft, 32-eccentric wheel, 321-center part, 322-moving part, 323-connecting hole, 324-mounting hole, 33-mounting part, 40-fastening assembly, 41-snapping ring, 42-protective cover, 421-through hole, 50-bearing, 51-outer ring, 52-inner ring, 53-rolling element, 60-cover body, 70-solenoid valve, 80-seal

[0043] Implementation Methods of the Application

[0044] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0048] 1 and 2 , the present invention provides an air pump 100, comprising a housing 10 and five cylinders 20. The housing 10 is provided with a center hole 11, five cylinder holes 12, five transmission air passages 13 and an air outlet passage 14. One end of each of the five cylinder holes 12 is connected to the center hole 11, and the five cylinder holes 12 are spaced apart in the circumferential direction of the center hole 11, and the cylinder holes 12 are used to accommodate the cylinders 20. Each transmission air passage 13 is used to connect two adjacent cylinder holes 12, and the five transmission air passages 13 are arranged along the circumference of the center hole 11. The five transmission air passages 13 and the five cylinder holes 12 together form an annular air passage connected end to end. The air outlet passage 14 connects any transmission air passage 13 with the external space. The five cylinders 20 are accommodated in the five cylinder holes 12 in a one-to-one correspondence.

[0049] The housing 10 is made of a material with high structural strength, specifically metal, high-strength plastic, ceramic, etc. The metal material is, for example, aluminum, aluminum alloy, magnesium alloy, iron, iron alloy, etc.

[0050] The shell 10 is divided into a bottom plate and side plates. The bottom plate is a regular pentagon and there are five side plates. The shell 10 can be an integrated structure, that is, the bottom plate and the side plates are an integrated structure made by an integrated molding process. The integrated molding process can be stamping, casting, etc., without limitation. The shell 10 can also be a split structure. The side plates and the bottom plate can be connected and fixed by welding, bonding, clamping, screwing, etc. Adjacent side plates can also be connected by screwing, clamping, etc. The wall thickness of the shell 10 can be roughly uniform, that is, the thickness of the side plates can be roughly uniform, and the thickness of the bottom plate and the side plates can also be roughly the same. The bottom plate and the side plates are an integrated structure to improve production efficiency, and the bottom plate and the side plates are a split structure to facilitate the disassembly and maintenance of the air pump 100.

[0051] The transmission air channel 13 can be a straight pipe or a curved pipe without limitation.

[0052] The shape of the center hole 11 can be circular, rectangular, etc. without limitation.

[0053] When the number of cylinder holes 12 and cylinders 20 is less than 5, the motor utilization efficiency and the pumping efficiency of the air pump 100 are low; when the number of cylinder holes 12 and cylinders 20 is greater than 5, the air pressure will affect the operation of the cylinder 20, which will reduce the pumping efficiency of the air pump 100; when the number of cylinder holes 12 and cylinders 20 is 5, the motor utilization rate of the air pump 100 is high, and the air pressure generated by the operation of the cylinder 20 will not have a counter-effect on the cylinder 20.

[0054] The shell 10 of the air pump 100 of the present invention is provided with five cylinder holes 12 and a transmission air channel 13 connecting two adjacent cylinder holes 12. There are five cylinders 20 in the five cylinder holes 12. When the air pump 100 moves, the gas generated by the five cylinders 20 is collected through the five transmission air channels 13 and the five cylinder holes 12 to form an annular air channel connected end to end and output through the outlet channel 14 connected to the external space and the transmission air channel 13, which greatly improves the working efficiency and inflation efficiency of the air pump 100.

[0055] 1 , in one embodiment, the five cylinder holes 12 are centrosymmetrical. The five centrosymmetrical cylinder holes 12 simplify the structure of the housing 10 and facilitate the production of the housing 10.

[0056] In one embodiment, the five transmission gas channels 13 are centrally symmetrical. The centrally symmetrical transmission gas channels 13 facilitate gas circulation, avoid excessive gas pressure in a particular transmission gas channel 13, and simplify the structure of the housing 10 and facilitate production.

[0057] 1 , in one embodiment, the inner wall surface of the cylinder hole 12 and the inner wall surface of the center hole 11 are smoothly transitioned.

[0058] The wall surface where the cylinder hole 12 contacts the center hole 11 is an arc surface, which reduces the friction between the cylinder 20 and the cylinder hole 12 and the center hole 11 when the cylinder 20 is working, thereby increasing the service life of the cylinder 20 and the air pump 100.

[0059] 1 and 2 , in one embodiment, the housing 10 further defines five mating holes 15 , which are connected to the five cylinder holes 12 in a one-to-one correspondence. The mating holes 15 are located at one end of the cylinder holes 12 away from the center hole 11 , and are used to accommodate the cover 60 .

[0060] One end of the fitting hole 15 communicates with the cylinder hole 12 , and the other end of the fitting hole 15 communicates with the external space.

[0061] A sealing member 80 is further provided between the cover 60 and the housing 10 to ensure a good sealing effect of the air pump 100 .

[0062] A matching hole 15 is provided corresponding to the cylinder hole 12 for receiving the cover 60 to seal the air pump 100 .

[0063] In one embodiment, the housing 10 is adapted to be detachably connected to the cover 60 .

[0064] The connection between the cover 60 and the housing 10 can be screw connection, clamp connection, etc., without limitation. Specifically, the housing 10 is provided with a threaded hole, and the cover 60 is provided with a matching threaded member.

[0065] The cover 60 of the air pump 100 of the present invention is detachable, which facilitates replacement of vulnerable parts in the air pump 100 and increases the service life of the air pump 100.

[0066] 2 , in one embodiment, the housing 10 further defines a receiving hole 16 for mounting a plurality of solenoid valves 70 . The plurality of solenoid valves 70 are connected to the five transmission airways 13 , and the solenoid valves 70 are used to control the gas flow in the transmission airways 13 .

[0067] There are multiple receiving holes 16, and the receiving holes 16 can also be used to install sensors.

[0068] The solenoid valve 70 is connected to the control board and is used to control the flow of gas in the transmission gas channel 13 .

[0069] 1 and 2 , in one embodiment, the air pump 100 further includes a drive assembly 30 . The drive assembly 30 extends into the central hole 11 , and the five cylinders 20 are all connected to the drive assembly 30 .

[0070] The driving assembly 30 may be fully extended into the housing 10 or partially extended into the housing 10 .

[0071] The solenoid valve 70 and the drive assembly 30 are respectively located on opposite sides of the housing 10, which facilitates the connection of the solenoid valve 70 with the control board located below the air pump 100, thereby reducing the assembly working space of the air pump 100 and reducing costs.

[0072] The driving assembly 30 can be driven by a motor, a hydraulic drive, etc., without limitation. The driving assembly 30 includes a driving member and a driving rod, wherein the driving member is used to drive the driving rod to move.

[0073] The driving assembly 30 can also be fixed relative to the central hole 11 , and the driving assembly 30 drives the cylinder 20 to move relative to the driving assembly 30 .

[0074] The movement of the five cylinders 20 in the air pump 100 is achieved by sharing a driving assembly 30, thereby achieving the effect of reducing production costs.

[0075] 1 and 3 , in one embodiment, the drive assembly 30 includes a connecting rod shaft 31 and an eccentric wheel 32 . The eccentric wheel 32 is connected to the connecting rod shaft 31 . The connecting rod shaft 31 extends into the center hole 11 . The five cylinders 20 are all rotatably connected to the connecting rod shaft 31 .

[0076] The five cylinders 20 are evenly spaced apart in the circumferential direction of the connecting rod shaft 31 .

[0077] The eccentric wheel 32 is a cam structure and includes a central portion 321 and a moving portion 322. The central portion 321 is connected to the moving portion 322. The central portion 321 can be fan-shaped, while the moving portion 322 can have a circular cross-section. The central portion 321 defines a connecting hole 323, through which a drive rod is inserted and fixed to the eccentric wheel 32, thereby driving the eccentric wheel 32. The connection between the eccentric wheel 32 and the drive rod can be threaded. Specifically, the connecting hole 323 can be a threaded hole, with threads provided at the location where the drive rod connects to the connecting hole 323.

[0078] The moving portion 322 is provided with a mounting hole 324, through which the connecting rod shaft 31 is fixedly mounted and fixed to the eccentric wheel 32. The driving rod drives the eccentric wheel 32 to move, and the eccentric wheel 32 drives the connecting rod shaft 31 and the cylinder 20 connected to the connecting rod shaft 31 to move. The connection between the connecting rod shaft 31 and the eccentric wheel 32 can be screwed, clamped, welded, etc., without limitation.

[0079] The connecting rod shaft 31 and the eccentric wheel 32 are made of materials with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials such as aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc. are not limited.

[0080] After the drive assembly 30 is started, the five cylinders 20 work simultaneously. The increase in the number of cylinders 20 of the air suspension greatly improves the pumping efficiency of the air pump 100, and the five cylinders 20 share one drive assembly 30 to achieve the effect of reducing production costs.

[0081] 3 and 4 , in one embodiment, the air pump 100 further includes a fastening assembly 40 , which is connected to the five cylinders 20 . The fastening assembly 40 is used to fix the cylinders 20 in the radial direction of the connecting rod shaft 31 .

[0082] The air pump 100 of the present invention is provided with five cylinders 20 and a fastening assembly 40. When the air pump 100 is working, part of the structure of the five cylinders 20 is connected to the eccentric wheel 32 to perform a circular motion around the connecting rod shaft 31. The fastening assembly 40 fixes the cylinder 20 in the radial direction of the connecting rod shaft 31 to prevent the cylinder 20 and the connecting rod shaft 31 from falling off when the air pump 100 moves at high speed, thereby enhancing the connection stability of the air pump 100 and improving the safety of the air pump 100.

[0083] 3, 4, and 5, in one embodiment, the cylinder 20 includes a piston rod 21 and a hook 22. The piston rod 21 is rotatably connected to the connecting rod shaft 31. The hook 22 is connected to the piston rod 21 and forms a slot 23. The opening of the slot 23 faces away from the connecting rod shaft 31. The fastening assembly 40 includes a snap ring 41. The snap ring 41 extends along the circumference of the connecting rod shaft 31 and is received in the slot 23.

[0084] The snap ring 41 can be connected end to end or not connected end to end, without limitation. The snap ring 41 can be a spring buckle or a spring ring, and the material of the snap ring 41 can be rubber, plastic, nylon, etc. with certain elastic deformation properties, without limitation.

[0085] The hook 22 is provided at the end of the piston rod 21 near the connecting rod shaft 31. The bottom wall of the slot 23 is an arcuate surface, which is used to reduce friction between the slot 23 and the snap ring 41, thereby increasing the service life of the snap ring 41. The snap ring 41 is received in the slot 23, and there is a gap between the snap ring 41 and the top surface of the slot 23.

[0086] 4 and 5 , in one embodiment, the hook 22 has a protrusion, which faces away from the connecting rod shaft 31 and has a gap with the piston rod 21 . The gap between the piston rod 21 and the connecting rod shaft 31 forms a slot 23 , the opening of the slot 23 faces away from the connecting rod shaft 31 , and the snap ring 41 is accommodated in the slot 23 .

[0087] The retaining ring 41 is accommodated in the retaining groove 23 of the five cylinders 20, and fixes the multiple cylinders 20 in the radial direction of the connecting rod shaft 31, preventing the cylinder 20 and the connecting rod shaft 31 from falling off when the air pump 100 moves at high speed, thereby enhancing the connection stability of the air pump 100 and improving the safety of the air pump 100.

[0088] 4 , in one embodiment, the air pump 100 further includes a bearing 50 , which includes an outer ring 51 and an inner ring 52 rotatably connected. The inner ring 52 is sleeved on and fixedly connected to the connecting rod shaft 31 , and the outer ring 51 is connected to the piston rod 21 .

[0089] Bearing 50 also includes rolling elements 53 and a cage. Rolling elements 53 are positioned between inner ring 52 and outer ring 51 to bear the load between the inner ring 52 and outer ring 51. The cage separates rolling elements 53 to reduce friction, evenly distributes rolling elements 53 to optimize load, guides unloaded rolling elements 53, and prevents them from scattering during installation or removal of bearing 50.

[0090] The drive assembly 30 also includes a mounting portion 33. The mounting portion 33 is annular and is sleeved around the connecting rod shaft 31 and fixedly connected to the connecting rod shaft 31. The radial dimension of the mounting portion 33 is larger than the radial dimension of the connecting rod shaft 31. One end of the mounting portion 33 abuts the outer ring 51 of the bearing 50, and the end of the mounting portion 33 away from the outer ring 51 is connected to the center portion 321 of the eccentric wheel 32. The provision of the mounting portion 33 creates a gap between the cylinder 20 and the eccentric wheel 32 in the axial direction of the eccentric wheel 32. This reduces contact friction between the piston rod 21 and the eccentric wheel 32 when the cylinder 20 moves, thereby increasing the service life of the air pump 100.

[0091] A bearing 50 is provided, and the outer ring 51 of the bearing 50 is connected to the piston rod 21, and the inner ring 52 of the bearing 50 is fixed to the connecting rod shaft 31, so that the piston rod 21 can rotate relative to the connecting rod shaft 31, playing a certain buffering role during the movement of the air pump 100.

[0092] 4 and 5 , in one embodiment, the piston rod 21 includes a rod body 211 and a connecting portion 212. The connecting portion 212 is connected to the end of the rod body 211 and is connected to the outer ring 51. The hook 22 is connected to the rod body 211 and / or the connecting portion 212. A connecting groove 2121 is defined on the surface of the connecting portion 212 facing away from the rod body 211, and the outer ring 51 is received in the connecting groove 2121.

[0093] The cross section of the rod body 211 can be rectangular, circular, trapezoidal, etc., without limitation.

[0094] The rod body 211 , the connecting portion 212 and the hook 22 may be an integrated structure, which may be prepared by processes such as stamping and grinding.

[0095] The end surface of the hook 22 close to the connecting rod shaft 31 may be flush with the end surface of the connecting portion 212 close to the connecting rod shaft 31, or may not be flush; the end surface of the hook 22 away from the connecting rod shaft 31 may be flush with the end surface of the connecting portion 212 away from the connecting rod shaft 31, or may not be flush, without limitation.

[0096] When the hook 22 is connected to the rod body 211 , the hook 22 and the connecting portion 212 may be connected and fixed to two opposite side surfaces of the rod body 211 .

[0097] When the hook 22 is connected to the connecting portion 212 , the side wall surface of the locking groove 23 can be connected to the connecting portion 212 , and the connecting portion 212 is connected to the rod body 211 .

[0098] The end surface of the hook 22 close to the connecting rod shaft 31 can be an arc surface, and the end surface of the connecting part 212 close to the connecting rod shaft 31 can also be an arc surface. There is a gap between the hook 22 and the connecting rod shaft 31, and a gap between the connecting part 212 and the mounting part 33. This reduces the friction between the hook 22 and the connecting rod shaft 31, and the connecting part 212 and the mounting part 33, and can improve the service life of various components in the air pump 100.

[0099] The opening of the connecting groove 2121 faces the connecting rod shaft 31. The bottom wall of the connecting groove 2121 is an arc surface, which is used to reduce the friction between the connecting groove 2121 and the outer ring 51 of the bearing 50, thereby increasing the service life of the bearing 50. The side wall of the connecting groove 2121 can be one end of the hook 22.

[0100] The hook 22 is connected to the fastening assembly 40, and the connecting portion 212 is connected to the outer ring 51 of the bearing 50. This allows the piston rod 21, connected to the eccentric wheel 32, to rotate around the connecting rod shaft 31 without falling off the connecting rod shaft 31, thereby improving the structural stability of the air pump 100. The connecting groove 2121 is used to connect the outer ring 51 of the bearing 50 to the piston rod 21. When the air pump 100 is in operation, the piston rod 21, connected to the eccentric wheel 32, rotates around the connecting rod shaft 31, and reduces friction between the piston rod 21 and the bearing 50.

[0101] 4 , in one embodiment, the fastening assembly 40 further includes a protective cover 42 . The protective cover 42 is disposed on the snap ring 41 and the hooks 22 of the five cylinders 20 .

[0102] The cross section of the protective cover 42 is circular and defines a through hole 421 through which the connecting rod shaft 31 passes.

[0103] The protective cover 42 is provided on the snap ring 41 and the hooks 22 of the five cylinders 20 to prevent the snap ring 41 from being separated from the hooks 22 and to achieve a double fastening effect to prevent the piston rod 21 from falling off during high-speed movement.

[0104] 1 and 3 , in one embodiment, the cylinder 20 includes a cylinder body 24 and a leather cup 25 . The leather cup 25 is disposed in the cylinder body 24 . The end of the piston rod 21 away from the connecting rod shaft 31 is connected to the leather cup 25 . The leather cup 25 is slidably connected to the cylinder body 24 .

[0105] Cylinder body 24 is a hollow tubular structure. Cylinder body 24 is made of a material having high structural strength, such as metal, high-strength plastic, ceramic, etc. Metal materials include aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys. Cylinder body 24 can be a one-piece structure manufactured by an integrated molding process, such as stamping, casting, etc., without limitation.

[0106] The material of the leather cup 25 can be plastic, rubber, etc. with certain elasticity, compression deformation and wear resistance, without limitation. The leather cup 25 can be an integral structure of integral injection molding.

[0107] The leather cup 25 can be divided into a bowl-shaped leather cup 25 and an annular leather cup 25 according to the cross-sectional shape of the cylinder body 24. Specifically, it can be a liquid-conducting bowl type, a liquid-conducting ring type, a pressure-bearing ring type, a positioning ring type, a "C" type, a reverse hole type, etc., without limitation.

[0108] Referring to Figure 1 , in one embodiment, the cylinder 20 further includes a cylinder head 26, which is connected to the end of the cylinder body 24 away from the connecting rod shaft 31. A sealing ring is also provided between the cylinder head 26 and the cylinder body 24 to enhance the sealing effect of the cylinder 20. When the air pump 100 compresses gas, the piston rod 21 drives the leather cup 25 to move closer to the cylinder head 26.

[0109] When the cylinder 20 is working, the driving assembly 30 drives the piston rod 21 to drive the leather cup 25 to move relative to the cylinder body 24. The leather cup 25 is arranged inside the cylinder body 24 to ensure that the cylinder 20 has a certain return ability and sealing ability during use, and can prevent air return when the air pump 100 is working.

[0110] The present invention provides an air suspension, comprising an elastic element and an air pump 100 as described in any one of the aforementioned embodiments, wherein the air pump 100 is used to compress the elastic element.

[0111] The air suspension also includes a damping element, an air supply unit, a controller, and sensors. The elastic element, which can be a coil spring, leaf spring, or air spring, provides cushioning, vibration reduction, and load-bearing functions. The damping element works in conjunction with the elastic element to dampen vibrations and enhance ride smoothness over rough roads. The air supply unit, which includes an air pump 100, a distribution valve, and a mount, adjusts the elastic element's expansion and contraction. The controller and sensors control the air supply unit and shock absorber in real time to adjust the air spring stiffness, shock absorber damping force, and transmit vehicle status. The air suspension utilizes the air pump 100 of the present invention. When the air pump 100 is operating, the partial structure of the five cylinders 20, connected to the eccentric wheel 32, rotates around the connecting rod shaft 31. The gas generated by the five cylinders 20 is collected through the five transmission air passages 13 and the five cylinder bores 12, forming a circular air passage that connects end to end. The gas is then output through the outlet passage 14, which is connected to the external space and the transmission air passage 13. This improves the pumping efficiency of the air pump 100. Furthermore, the five cylinders 20 are secured to the drive assembly 30 via the fastening assembly 40, which improves the structural stability of the air pump 100 and significantly enhances the efficiency and stability of the corresponding air suspension. Furthermore, the cover 60 of the air pump 100 is removable, facilitating replacement of vulnerable components within the air pump 100 and extending the service life of the air suspension.

[0112] The present invention provides a vehicle comprising an axle, a frame, and an air suspension as described in any of the aforementioned embodiments, the air suspension being used to connect the axle and the frame. The vehicle can be a rail transit vehicle or a road transit vehicle, without limitation. The air suspension used in the vehicle can mitigate impacts from the road surface, significantly improving ride comfort and controllability.

[0113] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" is based on the orientation or positional relationship described in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0114] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A housing for an air pump, wherein: The housing is provided with: Center hole; Five cylinder holes, one end of each of the five cylinder holes is connected to the central hole, the five cylinder holes are arranged at intervals in the circumferential direction of the central hole, and the cylinder holes are used to accommodate cylinders; Five transmission air passages, each of which is used to connect two adjacent cylinder holes, the five transmission air passages are arranged along the circumference of the central hole, and the five transmission air passages and the five cylinder holes together form an annular air passage connected end to end; The air outlet channel is connected to any of the transmission air channels and the external space.

2. The housing according to claim 1, wherein: The five cylinder holes are centrally symmetrical.

3. The housing according to claim 1, wherein: The five transmission airways are centrally symmetrical.

4. The housing according to claim 1, wherein: The inner wall surface of the cylinder hole and the inner wall surface of the center hole are smoothly transitioned.

5. The housing according to claim 1, wherein: The shell is further provided with five matching holes, which are connected to the five cylinder holes in a one-to-one correspondence. The matching holes are located at one end of the cylinder hole away from the center hole, and are used to accommodate the cover body.

6. The housing according to claim 5, wherein: The shell is suitable for being detachably connected to the cover.

7. The housing according to claim 1, wherein: The shell is also provided with a receiving hole, and the receiving hole is used to install a plurality of solenoid valves. The plurality of solenoid valves are connected to the five transmission air channels correspondingly, and the solenoid valves are used to control the gas flow in the transmission air channels.

8. An air pump comprising: The housing according to any one of claims 1 to 7; The five cylinders are accommodated in the five cylinder holes in a one-to-one correspondence.

9. The air pump according to claim 8, wherein: The air pump also includes a driving assembly, which extends into the central hole, and the five cylinders are all connected to the driving assembly.

10. The air pump according to claim 9, wherein: The driving assembly comprises a connecting rod shaft and an eccentric wheel, the eccentric wheel is connected to the connecting rod shaft, the connecting rod shaft extends into the central hole, and the five cylinders are all rotatably connected to the connecting rod shaft.

11. The air pump according to claim 10, wherein The air pump further comprises a fastening assembly, wherein the fastening assembly is connected to the five cylinders and is used for fixing the cylinders in the radial direction of the connecting rod shaft.

12. The air pump according to claim 11, wherein The cylinder comprises a piston rod and a hook, wherein the piston rod is rotatably connected to the connecting rod shaft, the hook is connected to the piston rod and forms a slot, and the opening of the slot faces away from the connecting rod shaft; The fastening assembly includes a snap ring, which extends along the circumference of the connecting rod shaft and is received in the snap groove.

13. The air pump according to claim 12, wherein: The air pump further comprises a bearing, wherein the bearing comprises an outer ring and an inner ring which are rotatably connected, the inner ring is sleeved on the connecting rod shaft and fixedly connected, and the outer ring is connected to the piston rod.

14. The air pump according to claim 13, wherein The piston rod comprises a rod body and a connecting portion, wherein the connecting portion is connected to the end of the rod body, the connecting portion is connected to the outer ring, and the hook is connected to the rod body and / or the connecting portion; A connecting groove is formed on a surface of the connecting portion facing away from the rod body, and the outer ring is received in the connecting groove.

15. The air pump according to claim 14, wherein The opening of the connecting groove faces the connecting rod shaft, and the bottom wall surface of the connecting groove is an arc surface.

16. The air pump according to claim 10, wherein The connecting rod shaft and the eccentric wheel are connected in any one of a screw connection, a clamp connection and a welding connection.

17. The air pump according to claim 12, wherein: The cylinder comprises a cylinder body and a leather cup, wherein the leather cup is arranged in the cylinder body, one end of the piston rod away from the connecting rod shaft is connected to the leather cup, and the leather cup is slidably connected to the cylinder body.

18. The air pump according to claim 8, wherein The shell includes any one of metal material, plastic and ceramic.

19. An air suspension comprising an elastic element and an air pump according to any one of claims 8 to 18, wherein the air pump is used to compress the elastic element.

20. A vehicle comprising an axle, a frame and the air suspension according to claim 19, wherein the air suspension is used to connect the axle and the frame.

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