Air spring shock absorber assembly and vehicle

Abstract

The embodiment of the present application discloses an air spring shock absorber assembly and a vehicle, which relates to the field of automobile manufacturing technology and can solve the problems of complex structure, high manufacturing and maintenance costs, and inconvenient disassembly and maintenance. The air spring shock absorber assembly includes an air spring sub-assembly and a shock absorber sub-assembly, wherein the air spring sub-assembly includes an upper top seat assembly and a lower air spring assembly; the shock absorber sub-assembly is vertically fixedly connected to the air spring sub-assembly. The upper top seat assembly includes an upper top seat and a support member, and the upper top seat has a accommodating cavity for accommodating at least part of the piston rod of the shock absorber sub-assembly and a bushing sleeved on the piston rod; in addition, the support member has a through hole, and at least part of the upper top seat is sleeved in the through hole and is detachably connected to the support member. The air spring shock absorber assembly of the present application is used for vibration isolation and buffering during vehicle driving.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automobile manufacturing technology, and in particular to an air spring shock absorber assembly and a vehicle. Background Art

[0002] As cars become more and more popular, in addition to meeting traditional target functions, driving safety, strength and durability, people now have higher and higher requirements for car lightweight, driving comfort and noise reduction. In the actual driving process of cars, the road conditions involved are complex, and the impact of the road surface will be transmitted to the car body, affecting driving comfort. As an ideal vibration isolation element, air springs add compressed air to a flexible sealed container and use the nonlinear restoring force of air compression to achieve vibration isolation and buffering, so as to reduce the up and down bumps of the car body and improve driving comfort.

[0003] In view of the general trend of "soft and hard separation" in the disassembly of automobile assemblies, that is, the separation design of metal structural parts with high strength requirements and soft and vulnerable parts such as rubber, it is particularly necessary to design the detachable design of air springs with more complex structures. Since air springs are generally highly integrated, the structure of the upper seat itself is relatively complex. For example, the upper end of the upper seat is usually connected to the body, and the upper seat bushing and other components need to be installed in the inner cavity of the upper seat.

[0004] In the related art, the upper seat is generally a single metal one-piece molding design, which has a complex structure, high manufacturing and maintenance costs, and is not easy to disassemble and repair. Summary of the invention

[0005] In view of this, an embodiment of the present application provides an air spring damper assembly and a vehicle, which have the advantages of simple structure, low manufacturing and maintenance costs, and easy disassembly and maintenance.

[0006] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application provides an air spring shock absorber assembly, including an air spring sub-assembly and a shock absorber sub-assembly, wherein the air spring sub-assembly includes an upper top seat assembly and a lower air spring assembly; the shock absorber sub-assembly is vertically fixedly connected to the air spring sub-assembly. The upper top seat assembly includes an upper top seat and a support member, and the upper top seat has a receiving cavity for receiving at least part of the piston rod of the shock absorber sub-assembly and a bushing sleeved on the piston rod; in addition, the support member has a through hole, and at least part of the upper top seat is sleeved in the through hole, and is detachably connected to the support member.

[0007] Specifically, the upper top seat assembly does not adopt an integrated molding design, but the upper top seat assembly is divided into two parts, the upper top seat and the support member, which are processed and molded separately, that is, a split design. Since the structure of the upper top seat is relatively complex, for example, the related technology adopts a single aluminum material for integrated molding, and its process and technology are relatively complicated, and the integrated molding design is often a single material part, which is difficult to form a composite material upper top seat. After the present application splits it into two relatively simple parts, the upper top seat and the support member, on the one hand, the complex parts can be converted into parts with simple structures, reducing the process and thus reducing the manufacturing cost; on the other hand, the materials of the two sub-parts of the upper top seat and the support member can be different, for example, one of the upper top seat and the support member can be made of metal material, and the other can be made of non-metallic material, which can help the lightweight design of the upper top seat assembly. In addition, the support member has a through hole, at least part of the upper top seat is sleeved in the through hole, and is detachably connected to the support member. Here, the detachable design of the support member and the upper top seat facilitates the disassembly and maintenance of the upper top seat assembly, thereby reducing the maintenance cost. For example, when the accommodating cavity wall of the upper top seat in the upper top seat assembly is damaged, or when the supporting member is damaged, only one of the components needs to be replaced, and there is no need to replace the entire upper top seat assembly structure, which can further reduce maintenance costs.

[0008] In a possible implementation of the present application, the accommodating cavity of the upper top seat is an annular structure, and the top end of the upper top seat is folded toward the outside of the accommodating cavity to have a flange perpendicular to the axis of the annular structure. The accommodating cavity is provided with a bearing portion, which is used to bear the bushing and the shock absorber subassembly, and the flange of the upper top seat is connected to the vehicle body through a connecting piece.

[0009] In a possible implementation of the present application, at least a portion of the outer wall of the upper top seat is in interference fit with the inner wall of the through hole of the support member. In this regard, since the inner wall of the support member needs to be in interference fit with the outer wall of the upper top seat, the inner wall of the support member needs to have high strength around it to prevent the inner wall from being damaged by excessive pressure. Therefore, reinforcing ribs can be placed on the inner wall of the through hole of the support member to improve the strength around the inner wall of the support member to prevent the inner wall of the support member from being squeezed and damaged.

[0010] In a possible implementation of the present application, the upper top seat is made of metal, the support member is made of elastic material, and the upper top seat and the support member are elastically interference fit. With such a design, since the support member is made of elastic material, the support member has the characteristic of being light in weight. Compared with the case where both the upper top seat and the support member are made of metal, it not only helps to reduce the weight of the air spring shock absorber assembly, but also reduces the manufacturing cost. In addition, the support member made of elastic material can withstand a certain amount of deformation. In this way, when the inner wall of the through hole of the support member and the outer wall of the annular structure of the upper top seat are elastically interference fit, it can avoid damage to the inner wall of the through hole of the support member caused by the upper top seat being pressed into the through hole of the support member.

[0011] In a possible implementation of the present application, the bushing includes a bushing inner tube and a bushing body, the bushing inner tube is sleeved on the piston rod, the bushing body is connected to the bushing inner tube, and the bushing is sleeved in the accommodating cavity and is detachably connected to the accommodating cavity. In this way, the bushing can be easily disassembled for maintenance or replacement, thereby further reducing the maintenance cost of the air spring damper assembly.

[0012] In a possible implementation of the present application, the inner tube of the bushing is made of metal, the bushing body is an elastomer, the bushing body is sleeved in the accommodating cavity, and the outer wall and inner wall of the bushing body are elastically interference fit. Here, compared with the interference fit between the bushing with a metal outer wall and the inner wall of the accommodating cavity, since the bushing body is an elastomer, when the bushing is pressed into the accommodating cavity, the bushing body and the inner wall of the accommodating cavity are elastically interference fit, which can reduce damage to the cavity wall surface, facilitate disassembly, and save maintenance costs.

[0013] In a possible implementation of the present application, the air spring damper assembly includes a retaining ring and an upper sealing cover, a first annular groove adapted to the retaining ring is provided on the inner wall of the accommodating cavity, at least a portion of the upper sealing cover is sleeved in the accommodating cavity and is gap-matched with the accommodating cavity, and a disassembly hole is provided on the upper top seat at a position on the side of the retaining ring away from the upper sealing cover, which is used to provide an operating space for a disassembly tool to remove the retaining ring. The retaining ring is provided to fix the upper sealing cover in the accommodating cavity, and the disassembly hole is provided to facilitate the removal of the retaining ring, thereby enabling the upper sealing cover to be taken out.

[0014] In a possible implementation of the present application, the disassembly hole passes through the top of the upper seat from top to bottom and extends to the same horizontal position as the upper seat and the retaining ring or below the same horizontal position. In this way, the operating end of the external disassembly tool can extend along the path of the disassembly hole to a position near the outer ring of the retaining ring so that the retaining ring can be disassembled.

[0015] In a possible implementation of the present application, the lower air spring assembly includes an air bag and a fastener, and the air bag is detachably connected to the support member through the fastener. In this way, it is easy to disassemble and repair the air spring damper assembly, reducing the maintenance cost.

[0016] The second aspect of the embodiment of the present application provides a vehicle, comprising a vehicle body, a bogie, and any one of the air spring shock absorber assemblies in the first aspect. The bogie is arranged below the vehicle body, one end of the air spring shock absorber assembly is connected to the vehicle body, and the other end is connected to the bogie. The air spring shock absorber can reduce the vibration of the vehicle in poor road conditions by adjusting the damping, making the vehicle body more stable, and effectively improving the smoothness of the vehicle's driving. The lightweight and easy disassembly and maintenance characteristics of the air spring shock absorber assembly can improve the lightweight of the vehicle and reduce the maintenance cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A schematic diagram of the structure of an air spring damper assembly provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structure of an air spring sub-assembly provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of a shock absorber sub-assembly structure provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of an upper seat structure provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of a support structure provided in an embodiment of the present application;

[0022] Figure 6 A schematic diagram of the structure of a bushing provided in an embodiment of the present application, located in an upper seat accommodating cavity.

[0023] Reference numerals:

[0024] 1-upper sealing cover; 2-air spring sub-assembly; 21-upper top seat assembly; 211-upper top seat; 2111-flange; 2112-accommodating chamber; 2113-bearing part; 2114-disassembly hole; 2115-first annular groove; 2116-second annular groove; 212-support member; 2121-through hole; 213-first sealing ring; 22-upper buckling ring; 23-bushing; 231-bushing inner tube; 232-bushing body; 24-support ring; 25-buffer block; 26-lower buckling ring; 27-outer sheath; 28-air bag; 29-piston; 3-third sealing ring; 4-connecting member; 5-shock absorber sub-assembly; 51-shock absorber cylinder; 52-piston rod; 6-locking nut; 7-second sealing ring; 8-retaining ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0026] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0027] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0028] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0029] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] In the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplarily" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0031] The embodiment of the present application provides a vehicle, including a vehicle body, a bogie, and an air spring and shock absorber assembly. The bogie is arranged below the vehicle body, one end of the air spring and shock absorber assembly is connected to the vehicle body, and the other end is connected to the bogie. When the vehicle is in poor road conditions, the air spring and shock absorber can reduce the vibration of the vehicle by adjusting the damping, making the vehicle body more stable, and effectively improving the smoothness of the vehicle's driving.

[0032] In some embodiments, reference Figure 1 and Figure 3The air spring shock absorber assembly includes an air spring subassembly 2 and a shock absorber subassembly 5, wherein the air spring subassembly 2 includes an upper seat assembly 21 and a lower air spring assembly; the shock absorber subassembly 5 is vertically fixedly connected to the air spring subassembly 2. The upper seat assembly 21 includes an upper seat 211 and a support member 212, the upper seat 211 has a receiving cavity 2112, which is used to receive at least part of the piston rod 52 of the shock absorber subassembly 5 and the bushing 23 sleeved on the piston rod 52; in addition, the support member 212 has a through hole 2121, at least part of the upper seat 211 is sleeved in the through hole 2121, and is detachably connected to the support member 212.

[0033] Specifically, the shock absorber subassembly 5 is vertically fixedly connected to the air spring subassembly 2, and the two are combined into a pillar-type air spring assembly for installation between the vehicle body and the bogie. In the present application, the upper top seat assembly 21 is not designed in an integrated form, but the upper top seat assembly 21 is divided into two parts, the upper top seat 211 and the support member 212, which are processed and formed separately, that is, a split design. Since the structure of the upper top seat 211 is relatively complex, for example, the related art adopts a single aluminum material for integrated molding, and its process and technology are relatively complex, and the integrated molding design is often a single material part, and it is difficult to form an upper top seat 211 with a composite material. After the present application separates the upper seat assembly 21 into two relatively simple parts, the upper seat 211 and the support member 212, on the one hand, the complex parts can be transformed into parts with simple structures, reducing the process and thus reducing the manufacturing cost; on the other hand, the materials of the two parts, the upper seat 211 and the support member 212, can be different. For example, one of the upper seat 211 and the support member 212 can be made of metal material, and the other can be made of non-metal material, which can help the lightweight design of the upper seat assembly 21. In addition, the support member 212 has a through hole 2121, and at least part of the upper seat 211 is sleeved in the through hole 2121 and is detachably connected to the support member 212. Here, the detachable design of the support member 212 and the upper seat 211 facilitates the disassembly and maintenance of the upper seat assembly 21, thereby reducing the maintenance cost. For example, when the wall of the accommodating cavity 2112 of the upper seat 211 in the upper seat assembly 21 is damaged, or when the support member 212 is damaged, only one of the components needs to be replaced, and there is no need to replace the entire upper seat assembly 21 structure.

[0034] Here, since the support member 212 is made of non-metallic material, such as elastic material such as rubber, it is difficult to have the same service life as the upper seat 211 made of metal, that is, during use, it is inevitable that one of them will be damaged first. In this way, a detachable design is very necessary to facilitate disassembly and replacement of one of the components when it is damaged. For example, when the support member 212 is damaged first, only the support member 212 needs to be disassembled and replaced, and there is no need to replace the entire upper seat assembly 21 structure. The above "soft and hard separation" design can facilitate disassembly and maintenance while reducing production costs.

[0035] It should be noted that the cross-sectional shape of the accommodating cavity 2112 of the upper seat 211 is not limited and can be circular, elliptical, square, etc. Preferably, the cross-sectional shape of the accommodating cavity 2112 of the upper seat 211 is circular. In comparison, the circular cross-section is easy to process and form, and the accommodating cavity 2112 needs to accommodate air spring elements such as the piston rod 52 and the bushing 23. The accommodating cavity 2112 with a circular cross-section is convenient for sealing a variety of air spring elements. Unless otherwise specified in this application, the accommodating cavity 2112 with a circular cross-section is used for description. In addition, the cross-sectional shape of the inner wall of the corresponding support member 212 is consistent with the cross-sectional shape of the accommodating cavity 2112, so that the two are connected by interference fit.

[0036] In some embodiments, reference Figure 1 , Figure 2 and Figure 4 The accommodating cavity 2112 of the upper top seat 211 is an annular structure. The top end of the upper top seat 211 is folded toward the outside of the accommodating cavity 2112 to form a flange 2111 perpendicular to the axis of the annular structure. The accommodating cavity 2112 has a bearing portion 2113. The bearing portion 2113 is used to bear the bushing 23 and the shock absorber subassembly 5. The flange 2111 of the upper top seat 211 is connected to the vehicle body through the connecting member 4. The specific structural form of the connecting member 4 is not limited. Preferably, a bolt connection is adopted, which is simple, reliable, and detachable. Bolt holes are provided on the flange 2111 of the upper top seat 211. Here, the number of bolt holes is not limited. Preferably, the number of bolt holes is two, which are symmetrically arranged on the flange 2111 structure of the upper top seat 211. In addition, the specific structural form of the connecting member 4 is not limited. Bolts matching the bolt holes pass through the bolt holes on the flange 2111 and are fastened to the vehicle body, so that the air spring damper assembly is connected to the vehicle body.

[0037] Reference Figure 1 , Figure 4 and Figure 5, at least part of the outer wall of the upper top seat 211 is interference fit with the inner wall of the through hole 2121 of the support member 212. In this, since the inner wall of the support member 212 needs to be interference fit with the outer wall of the upper top seat 211, the inner wall of the support member 212 needs to have high strength around it to prevent the inner wall from being damaged by excessive pressure. Therefore, reinforcing ribs can be arranged on the inner wall of the through hole 2121 of the support member 212 to improve the strength around the inner wall of the support member 212 to prevent the inner wall of the support member 212 from being squeezed and damaged.

[0038] It should be noted that the specific structure of the reinforcing ribs and their materials are not limited, as long as they meet the strength requirements of the support member 212. Preferably, the reinforcing rib structure may include a plurality of longitudinal ribs and annular ribs, and the plurality of annular ribs are fixed to the inner wall of the support member 212, arranged along the axial direction of the inner wall of the support member 212, and connected to the plurality of longitudinal ribs. In addition, preferably, the reinforcing ribs are made of a carbon fiber composite material that is lightweight and high in strength.

[0039] In some embodiments, reference Figure 1 , Figure 4 and Figure 5 , the upper seat 211 is made of metal, the support member 212 is made of elastic material, and the upper seat 211 and the support member 212 are elastically interference fit. With such a design, since the support member 212 is made of elastic material, the support member 212 has the characteristic of being light in weight. Compared with the case where both the upper seat 211 and the support member 212 are made of metal, it not only helps to reduce the weight of the air spring shock absorber assembly, but also reduces the manufacturing cost. In addition, the support member 212 made of elastic material can withstand a certain amount of deformation. In this way, when the inner wall of the through hole 2121 of the support member 212 is elastically interference fit with the outer wall of the annular structure of the upper seat 211, it can be avoided that the inner wall of the through hole 2121 is damaged when the upper seat 211 is pressed into the through hole 2121 of the support member 212.

[0040] It should be noted that the specific material of the support member 212 is not limited, and it can be elastic, light and high-strength, such as carbon fiber composite material, polyurethane composite material, polyolefin elastic material, etc. Preferably, the support member 212 is made of glass fiber reinforced nylon, which has many advantages compared to metal materials, such as low density, light weight, good elastic deformation and insulation, easy processing and molding, reduced noise, reduced vibration, and low cost. In the upper top seat assembly 21, the metal upper top seat 211 can be made of aluminum by forging or cold heading.

[0041] In some embodiments, reference Figure 1 and Figure 6The bushing 23 includes a bushing inner tube 231 and a bushing body 232. The bushing inner tube 231 is sleeved on the piston rod 52. The bushing body 232 is connected to the bushing inner tube 231. The bushing 23 is sleeved in the accommodating cavity 2112 and is detachably connected to the accommodating cavity 2112. In this way, the bushing 23 can be easily disassembled for maintenance or replacement, thereby further reducing the maintenance cost of the air spring damper assembly.

[0042] Continue, refer to Figure 1 and Figure 6 The bushing inner tube 231 is made of metal, the bushing body 232 is an elastic body, the bushing body 232 is sleeved in the accommodating cavity 2112, and the outer wall and the inner wall of the bushing body 232 are elastically interference fit. Here, compared with the interference fit between the bushing 23 with a metal outer wall and the inner wall of the accommodating cavity 2112, since the bushing body 232 is an elastic body, when the bushing 23 is pressed into the accommodating cavity 2112, the bushing body 232 and the inner wall of the accommodating cavity 2112 are elastically interference fit, which can reduce damage to the cavity wall surface, facilitate disassembly, and save maintenance costs.

[0043] It should be noted that the material of the bushing body 232 is not specifically limited, and it only needs to be elastic and have high strength. For example, it can be a polyurethane elastomer, which has both the high elasticity of rubber and the high strength of plastic, and has excellent oil resistance, impact resistance, oil resistance, heat insulation and other properties, or it can be rubber, etc. Here, preferably, the bushing body 232 is formed by bonding nylon and rubber. For the formation of the bushing body 23, specifically, a series of surface treatments can be performed on the nylon, and then an adhesive can be applied, and then the mixed rubber sheet can be attached to the nylon and heated and pressurized for vulcanization to achieve bonding, thereby forming a strong combination.

[0044] Further, refer to Figure 1 and Figure 6 The nylon material side of the bushing body 232 is fixedly connected to the outer wall of the metal bushing inner tube 231 , and the rubber material part of the bushing body 232 is elastically interference fit with the inner wall of the accommodating cavity 2112 . In this way, since nylon has good wear resistance and lubrication properties, the service life of the bushing body 232 can be increased; in the related art, the bushing 23 usually adopts rubber bonding of the inner metal frame and the outer metal frame, that is, the bushing inner tube 231 and the bushing outer tube are both metal frames, and the bushing 23 is often pressed into the upper top seat 211 accommodating cavity 2112 by interference fit, and this matching method has the following shortcomings. First, since the bushing outer tube of the metal frame is squeezed and contacted with the inner wall of the accommodating cavity 2112, a large pressing force is required when the bushing 23 is pressed out, which will cause the bushing outer tube or the accommodating cavity 2112 to be damaged and deformed; second, it is difficult to disassemble; third, when the bushing outer tube is radially interference fit in the accommodating cavity 2112, the cavity wall is thicker after the contact parts of the two are superimposed, resulting in material waste.

[0045] In the present application, the bushing 23 cancels the metal outer tube, and the rubber material part of the bushing body 232 directly contacts the inner wall of the accommodating cavity 2112. In addition, the rubber material has good elasticity. When the bushing 23 is pressed into the accommodating cavity 2112, the rubber material part of the bushing body 232 and the inner wall of the accommodating cavity 2112 are elastic interference fit. Compared with the outer wall of the bushing 23 being made of metal, it can reduce the damage to the cavity wall surface, and is easy to disassemble and save costs. In addition, in the present application, the bushing 23 can be assembled in place together with the tightening process of the locking nut 6 through the bushing inner tube, thereby reducing the process of pressing the bushing 23 into the upper seat 211 by the equipment in the related art, thereby reducing the production cost.

[0046] The piston rod 52 of the shock absorber subassembly 5 passes through the piston, buffer block 25 and bushing 23 of the air spring subassembly 2 and is fastened to the bushing 23 of the upper top seat 211 by the locking nut 6 .

[0047] In some embodiments, reference Figure 1 , Figure 2 and Figure 4 The air spring damper assembly includes a retaining ring 8 and an upper sealing cover 1. A first annular groove 2115 adapted to the retaining ring 8 is provided on the inner wall of the accommodating cavity 2112. At least part of the upper sealing cover 1 is sleeved in the accommodating cavity 2112 and is in clearance with the accommodating cavity 2112. A disassembly hole 2114 is provided on the upper seat 211 at a position on the side of the retaining ring 8 away from the upper sealing cover 1, which is used to provide an operating space for the disassembly tool to disassemble the retaining ring 8. The retaining ring 8 is used to fix the upper sealing cover 1 in the accommodating cavity 2112, and the disassembly hole 2114 is provided to facilitate the disassembly of the retaining ring 8, thereby enabling the upper sealing cover 1 to be taken out.

[0048] Further, refer to Figure 1 , Figure 2 and Figure 4 The disassembly hole 2114 penetrates the top of the upper seat 211 from top to bottom and extends to the same level as or below the upper seat 211 and the retaining ring 8. In this way, the operating end of the external disassembly tool can extend along the path of the disassembly hole 2114 to a position near the outer ring of the retaining ring 8 so that the retaining ring 8 can be disassembled.

[0049] It should be noted that the specific structural form of the retaining ring 8 is not limited here. For example, it can be an ordinary steel wire retaining ring, a flattened steel wire retaining ring and an elastic retaining ring. Preferably, a hole-forming steel wire retaining ring can be used, which has strong stability, high strength and no lug interference.

[0050] Further, it should be noted that the cross-sectional shape of the disassembly hole 2114 is not limited, and can be semicircular, square, circular, polygonal, etc. The size of the disassembly hole 2114 is also not limited, and the appropriate size and cross-sectional shape of the disassembly hole 2114 can be matched according to the structure of the disassembly tool. For example, when the cross-sectional shape of the operating end of the disassembly tool is circular, a circular hole that matches its cross-sectional shape can be selected. The disassembly hole 2114 can also have a certain bending portion that can match the outer contour of the operating end of the disassembly tool. In addition, the number of disassembly holes 2114 is not limited. Preferably, the number of disassembly holes 2114 is two, symmetrically arranged on the upper top seat 211.

[0051] In addition, due to the complex road conditions involved in the actual driving process of the vehicle, the air spring shock absorber assembly needs to be sealed in order to cope with various complex road conditions to prevent air leakage and thus exert its application performance. Therefore, the air spring shock absorber assembly needs to be well sealed.

[0052] For example, in some embodiments, reference Figure 1 , Figure 2 and Figure 4 The air spring sub-assembly 2 includes a first sealing ring 213, and the first sealing ring 213 is provided between the bottom surface of the flange 2111 structure of the upper top seat 211 and the upper surface of the support member 212. Specifically, the first sealing ring 213 can be sleeved on the outer wall of the accommodating cavity 2112 and abut against the upper surface of the support member 212. The first sealing ring 213 is used to prevent air leakage from the air spring sub-assembly 2 after the upper top seat 211 is sleeved on the through hole 2121 of the support member 212. Among them, the type of the first sealing ring 213 is not limited, and it can be an O-ring, a square sealing ring, a star-shaped sealing ring, etc. Preferably, the first sealing ring 213 is a star-shaped sealing ring, which, in comparison, forms a lubrication cavity between the sealing lips, has smaller friction resistance, a longer service life, and a better sealing effect.

[0053] Continue, refer to Figure 1 , Figure 2 and Figure 4 The air spring sub-assembly 2 also includes a second sealing ring 7, which is arranged between the upper sealing cover 1 and the accommodating chamber 2112. Specifically, a second annular groove 2116 adapted to the second sealing ring 7 is opened on the inner wall of the accommodating chamber 2112. The second sealing ring 7 is used to be installed in the second annular groove 2116. Since the upper sealing cover 1 and the accommodating chamber 2112 are clearance fits, air leakage is more likely to occur compared to interference fits. The second sealing ring 7 can be used to seal the upper sealing cover 1 and the accommodating chamber 2112 to prevent air leakage. Among them, the second sealing ring 7 can adopt an O-ring with low cost and good sealing effect.

[0054] Further, refer to Figure 1 , Figure 2 and Figure 4 The shock absorber subassembly 5 includes a shock absorber cylinder 51, and the air spring subassembly 2 includes a third sealing ring 3. The shock absorber cylinder 51 and the lower end of the piston 29 are sealed by the third sealing ring 3. The third sealing ring 3 is elastically interference fit with the shock absorber cylinder 51 and the lower end of the piston 29, respectively. Such a design facilitates the disassembly and maintenance of the shock absorber subassembly 5, thereby reducing maintenance costs.

[0055] In addition, refer to Figure 1 and Figure 2 , the lower air spring assembly includes an airbag 28, a support ring outer sheath 27, a support ring 24 and a fastener, and the airbag 28 is detachably connected to the support member 212 through the fastener. Here, the specific structural form of the fastener is not limited, and the fastener is sufficient to fasten the airbag 28 to the outer peripheral side wall of the support member 212. Preferably, there are two fasteners, namely an upper buckling ring 22 and a lower buckling ring 26. Specifically, the airbag 28 is tightly clamped on the outer peripheral side wall of the support member 212 by the upper buckling ring 22, and the support member 212 and the airbag 28 are sealed by the upper buckling ring 22, and the airbag 28 and the upper port of the piston 29 are tightly clamped by the lower buckling ring 26, and the outer sheath 27 is plastically deformed by buckling to wrap the support ring and the airbag 28.

[0056] Therefore, when the air spring shock absorber assembly fails, after disassembling the air spring sub-assembly 2 and the shock absorber sub-assembly 5, the upper sealing cover 1, the upper top seat 211, the bushing 23, the support 212 and the airbag 28 and the piston buckling assembly and other parts can also be disassembled. Among them, the bushing 23, the support 212, the airbag 28, the first sealing ring 213, the second sealing ring 7, etc. are the soft parts in the "soft and hard separation", that is, the consumable parts. The above parts usually have a short service life. In order to facilitate maintenance and replacement, the present application has made these consumable parts detachable to reduce maintenance costs.

[0057] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An air spring damper assembly, characterized in that: include: An air spring subassembly, the air spring subassembly comprising an upper top seat assembly and a lower air spring assembly; A shock absorber sub-assembly, vertically fixedly connected to the air spring sub-assembly; The upper seat assembly comprises an upper seat and a support member, wherein the upper seat has a receiving cavity for receiving at least a portion of a piston rod of the shock absorber subassembly and a bushing sleeved on the piston rod; the receiving cavity is an annular structure; The support member has a through hole, and at least a portion of the upper seat is sleeved in the through hole and is detachably connected to the support member; The bushing comprises a bushing inner tube and a bushing body, the bushing inner tube is sleeved on the piston rod, the bushing body is connected to the bushing inner tube, the bushing is sleeved in the accommodating cavity, and is detachably connected to the accommodating cavity; The bushing is fastened to the piston rod through the bushing inner tube and the locking nut; the bushing can enter the accommodating cavity through the bushing inner tube and the locking nut is tightened to be assembled in place; The inner tube of the bushing is made of metal, the bushing body is an elastomer, the bushing body is sleeved in the accommodating cavity, the inner circumferential wall of the bushing body connected to the bushing inner tube contains nylon material, the outer circumferential wall of the bushing body elastically interference fit with the inner circumferential wall of the accommodating cavity contains rubber material, and the entire outer circumferential wall of the bushing body is elastically interference fit with the inner circumferential wall of the accommodating cavity in an annular structure.

2. The air spring damper assembly according to claim 1, characterized in that: The top end of the upper seat is folded toward the outside of the accommodating cavity to form a flange perpendicular to the axis of the annular structure. The accommodating cavity has a bearing portion for bearing the bushing and the shock absorber subassembly. The flange of the upper seat is connected to the vehicle body through a connecting piece.

3. The air spring damper assembly according to claim 2, characterized in that: At least a portion of the outer wall of the upper seat is interference-fitted with the inner wall of the through hole of the support member.

4. The air spring damper assembly according to claim 3, characterized in that: The upper seat is made of metal, the support member is made of elastic material, and the upper seat and the support member are elastically interference fit.

5. The air spring damper assembly according to claim 1, characterized in that: It includes a retaining ring and an upper sealing cover, the inner wall of the accommodating cavity is provided with a first annular groove adapted to the retaining ring, at least part of the upper sealing cover is sleeved in the accommodating cavity and cooperates with the clearance of the accommodating cavity, and the upper top seat is provided with a disassembly hole at a position on the side of the retaining ring away from the upper sealing cover, which is used to provide an operating space for a disassembly tool to remove the retaining ring.

6. The air spring damper assembly according to claim 5, characterized in that: The disassembly hole passes through the top of the upper seat from top to bottom, and extends to the same horizontal position of the upper seat and the retaining ring or below the same horizontal position.

7. The air spring damper assembly according to claim 6, characterized in that: The lower air spring assembly includes an air bag and a fastener, and the air bag is detachably connected to the support member through the fastener.

8. A vehicle, characterized in that: include: Vehicle body; A bogie, arranged below the vehicle body; The air spring damper assembly according to any one of claims 1 to 7, wherein one end of the air spring damper assembly is connected to the vehicle body, and the other end is connected to the bogie.

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