Air spring damper assembly, suspension system, and vehicle

Abstract

The application relates to an air spring shock absorber assembly, a suspension system and a vehicle, and the air spring shock absorber assembly comprises a shock absorber and an air spring assembly. The air spring assembly comprises a supporting seat, a first mounting seat and a sealing film, the supporting seat is used for being connected with a vehicle body, the supporting seat is provided with a avoiding hole, a piston rod of the shock absorber is arranged in the avoiding hole, the first mounting seat is arranged on the piston rod, the sealing film comprises an inner circumferential part, a film main body and an outer circumferential part which are sequentially connected, the inner circumferential part is connected with the first mounting seat, the outer circumferential part is connected with the supporting seat, and at least one of the supporting seat and the first mounting seat is integrally formed with the sealing film. The application aims to reduce the assembly steps of the air spring shock absorber assembly, so that the assembly efficiency of the air spring shock absorber assembly is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to an air spring shock absorber assembly, a suspension system, and a vehicle. Background Technology

[0002] In related technologies, a vehicle's suspension system includes an air spring damper assembly, which includes a damper and an air spring assembly. The air spring assembly includes a support, a first mounting base, and a sealing diaphragm. The support is used to connect to the vehicle body and has a clearance hole. The piston rod of the damper passes through the clearance hole, and the first mounting base is located on the piston rod.

[0003] However, during the assembly of the air spring damper assembly, the sealing diaphragm needs to be assembled with the support base and the first mounting base respectively, which makes the assembly of the air spring damper assembly more complicated and reduces the assembly efficiency of the air spring damper assembly. Utility Model Content

[0004] This application provides an air spring damper assembly, a suspension system, and a vehicle, aiming to reduce the assembly steps of the air spring damper assembly, thereby improving the assembly efficiency of the air spring damper assembly.

[0005] To achieve the above objectives, according to a first aspect of this application, an air spring damper assembly is provided, comprising:

[0006] Shock absorbers; and

[0007] An air spring assembly includes a support base, a first mounting base, and a sealing diaphragm. The support base is used to connect to the vehicle body and has a clearance hole. The piston rod of the shock absorber passes through the clearance hole, and the first mounting base is disposed on the piston rod.

[0008] The sealing membrane includes an inner peripheral portion, a membrane body, and an outer peripheral portion connected in sequence. The inner peripheral portion is connected to the first mounting base, and the outer peripheral portion is connected to the support base. At least one of the support base and the first mounting base is integrally formed with the sealing membrane.

[0009] Optionally, the first mounting base has a first groove, and the inner peripheral portion is disposed in the first groove.

[0010] Optionally, the first mounting base is disposed around the piston rod, and the first groove is formed on the inner peripheral side of the first mounting base. In the radial direction of the piston rod, the gap between the inner peripheral side of the first mounting base and the outer peripheral side of the piston rod is smaller than the size of the inner peripheral portion.

[0011] Optionally, the air spring damper assembly further includes a first sealing ring, which connects the inner circumferential side of the first mounting base and the outer circumferential side of the piston rod;

[0012] And / or, the sealing membrane is clearance-fitted with the piston rod.

[0013] Optionally, during the movement of the piston rod, the area where the first mounting seat can contact the membrane body is smoothly arranged.

[0014] Optionally, the support seat further includes a first annular portion and a second annular portion. Along the axial direction of the piston rod, the first annular portion and the second annular portion are connected in sequence. Both the first annular portion and the second annular portion surround the piston rod. The first annular portion has a first cavity, and the second annular portion has the clearance hole. The clearance hole communicates with the first cavity. The inner diameter of the clearance hole is smaller than the inner diameter of the first cavity. The outer peripheral portion is disposed in the first cavity.

[0015] Optionally, the air spring shock absorber assembly further includes a second mounting base, which is disposed in the first cavity, and the outer periphery is fixed to the support base by the second mounting base.

[0016] Optionally, along the axial direction of the piston rod, the second mounting seat presses the outer periphery against the second annular portion.

[0017] Optionally, along the axial direction of the piston rod, the second mounting seat is provided with a first fixing groove on the side near the second annular portion, and the outer peripheral portion is provided in the first fixing groove;

[0018] And / or, along the axial direction of the piston rod, the second annular portion is provided with a first sealing groove on the side near the second mounting seat, and the outer peripheral portion is provided in the first sealing groove.

[0019] Optionally, along the radial direction of the piston rod, the second mounting seat presses the outer peripheral portion against the first annular portion;

[0020] And / or, the second mounting base is provided with a second fixing groove, and the outer peripheral portion is fixed to the second fixing groove.

[0021] Optionally, the air spring damper assembly further includes a limiting member fixed to the support base. Along the axial direction of the piston rod, the opposite two ends of the mounting base contact the limiting member and the second annular portion, respectively.

[0022] Optionally, the inner circumferential side of the first annular portion is provided with a mounting groove, and the limiting member is disposed in the mounting groove.

[0023] Optionally, the air spring shock absorber assembly further includes a second sealing ring, which is disposed between the outer peripheral side of the second mounting base and the inner peripheral side of the first annular portion;

[0024] And / or, the air spring damper assembly further includes a third sealing ring along the axial direction of the piston rod, the third sealing ring being disposed between the second mounting and the second annular portion.

[0025] Optionally, the outer peripheral side of the second mounting base is connected to the inner peripheral side of the first annular portion by a thread;

[0026] And / or, during the movement of the piston rod, the area where the second mounting seat can contact the membrane body is smoothly arranged.

[0027] Optionally, during the movement of the piston rod, the area where the second annular portion can contact the membrane body is smoothly arranged.

[0028] Optionally, the membrane body is at least partially disposed within the clearance hole.

[0029] Optionally, the portion of the membrane body disposed within the clearance hole is bent.

[0030] Optionally, the first mounting base can enter and exit the clearance hole, and when the first mounting base is at least partially inserted into the clearance hole, the single-sided gap between the outer peripheral side of the first mounting base and the hole wall of the clearance hole is between 4 mm and 6 mm.

[0031] Optionally, the support seat further includes a third annular portion along the axial direction of the piston rod. The second annular portion is disposed between the first annular portion and the third annular portion. The third annular portion surrounds the piston rod and has a second cavity. The two ends of the clearance hole are respectively connected to the first cavity and the second cavity. One of the first cavity and the second cavity is configured as an air cavity, and the other is configured as a vibration isolation cavity.

[0032] Optionally, the air spring damper assembly further includes a vibration isolation member disposed in the vibration isolation cavity along the axial direction of the piston rod, with both sides of the first mounting seat contacting the vibration isolation member and the piston rod respectively.

[0033] Optionally, the support base is provided with a second groove, and the outer peripheral portion is disposed in the second groove.

[0034] Optionally, the vibration damper is configured as an electronically controlled vibration damper;

[0035] And / or, at least one of the support and the first mounting base is integrally formed with the sealing film by vulcanization.

[0036] According to a second aspect of this application, a suspension system is provided, including the aforementioned air spring damper assembly.

[0037] According to a third aspect of this application, a vehicle is also provided, including the aforementioned suspension system.

[0038] In the air spring damper assembly of this application embodiment, if the support base and the sealing membrane are integrally formed, then there is no need to assemble the support base and the sealing membrane separately during assembly; similarly, if the first mounting base and the sealing membrane are integrally formed, the corresponding assembly steps can also be omitted; similarly, if both the support base and the first mounting base are integrally formed with the sealing membrane, the corresponding assembly steps can also be omitted; even if only one of them is integrally formed with the sealing membrane, at least one assembly step can be reduced, thereby simplifying the assembly process and significantly improving the assembly efficiency of the air spring damper assembly.

[0039] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0042] Figure 1 This is a schematic diagram of the overall structure of the air spring damper assembly provided in the exemplary first embodiment of this disclosure.

[0043] Figure 2 yes Figure 1 Partial sectional view of the air spring shock absorber assembly;

[0044] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0045] Figure 4 This is a partial cross-sectional view of the air spring damper assembly provided in the exemplary second embodiment of this disclosure;

[0046] Figure 5 Yes, yes Figure 4 Enlarged view of point B in the middle;

[0047] Figure 6This is a partial cross-sectional view of the air spring damper assembly provided in the exemplary third embodiment of this disclosure;

[0048] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0049] Figure 8 This is a partial cross-sectional view of the air spring damper assembly provided in the exemplary fourth embodiment of this disclosure;

[0050] Figure 9 This is a partial cross-sectional view of the air spring damper assembly provided in the exemplary fifth embodiment of this disclosure.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100. Air spring shock absorber assembly; 200. Shock absorber; 210. Piston rod; 211. First rod section; 212. Second rod section; 300. Air spring assembly; 400. Support base; 410. First annular portion; 411. First cavity; 412. Mounting groove; 420. Second annular portion; 421. Clearance hole; 422. First sealing groove; 423. Second recess; 430. Third annular portion; 431. Second cavity; 500. First mounting base; 510. First recess; 520. Second sealing groove; 600, Sealing membrane; 610, Inner circumference; 620, Membrane body; 630, Outer circumference; 710, Second mounting base; 711, First fixing groove; 712, Second fixing groove; 720, Limiting component; 730, First sealing ring; 740, Second sealing ring; 750, Third sealing ring; 760, Vibration isolation component; 761, Outer frame; 762, Top adhesive; 763, Inner frame; 810, Screw; 820, Upper clamping ring; 830, Bladder skin; 840, Bladder skin guide sleeve; 850, Dust cover; 860, Lower fork. Detailed Implementation

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0054] According to the first aspect of this application, referring to Figures 1 to 3This disclosure provides an air spring shock absorber assembly 100. The air spring shock absorber assembly 100 includes a shock absorber 200 and an air spring assembly 300. The air spring assembly 300 includes a support base 400, a first mounting base 500, and a sealing membrane 600. The support base 400 is used for connection to the vehicle body and has a clearance hole 421. The piston rod 210 of the shock absorber 200 passes through the clearance hole 421. The first mounting base 500 is disposed on the piston rod 210. The sealing membrane 600 includes an inner peripheral portion 610, a membrane body 620, and an outer peripheral portion 630 connected in sequence. The inner peripheral portion 610 is connected to the first mounting base 500, and the outer peripheral portion 630 is connected to the support base 400. At least one of the support base 400 and the first mounting base 500 is integrally formed with the sealing membrane 600.

[0055] In related technologies, the sealing membrane 600 needs to be assembled separately with the support base 400 and the first mounting base 500, which involves two independent assembly operations and is cumbersome. In this solution, if the support base 400 and the sealing membrane 600 are integrally formed, then there is no need to assemble the support base 400 and the sealing membrane 600 separately during assembly; similarly, if the first mounting base 500 and the sealing membrane 600 are integrally formed, the corresponding assembly steps can also be omitted; similarly, if both the support base 400 and the first mounting base 500 are integrally formed with the sealing membrane 600, the corresponding assembly steps can also be omitted; even if only one of them is integrally formed with the sealing membrane 600, at least one assembly step can be reduced, thereby simplifying the assembly process and significantly improving the assembly efficiency of the air spring shock absorber assembly 100.

[0056] The airtight connection between the sealing membrane 600 and the support base 400 and the first mounting base 500 is crucial for ensuring the normal operation of the air spring. Traditional assembly methods may lead to air leakage due to loose connections or gaps, affecting the performance of the air spring. One-piece molding, however, firmly integrates the sealing membrane 600 with the corresponding components to form a unified structure, effectively eliminating gaps at the connection points, greatly improving sealing performance, reducing the risk of leakage, and ensuring the stable operation of the air spring assembly 300.

[0057] By adopting a one-piece molding process, at least one of the support base 400 and the first mounting base 500 forms a more stable connection with the sealing membrane 600, enhancing the overall structural strength and rigidity. During vehicle operation, the air spring damper assembly 100 is subjected to various forces due to road bumps, etc. Traditionally assembled connections may loosen or wear under these forces. The one-piece molding structure can better withstand these forces, reducing relative movement and wear between components, thereby improving the structural stability and service life of the entire air spring damper assembly 100 and enhancing its reliability. Furthermore, one-piece molding can reduce the machining precision required for the inner circumference 610 and / or the outer circumference 630.

[0058] In the first embodiment, the first mounting base 500 has a first groove 510, and the inner peripheral portion 610 is disposed in the first groove 510.

[0059] The first groove 510 provides a precise installation and positioning space for the inner circumference 610 of the sealing membrane 600.

[0060] In one example, during the vulcanization process, the first groove 510 allows for a larger contact area and a tighter fit between the inner circumference 610 and the first mounting base 500, preventing the inner circumference 610 from shifting or loosening during assembly or use. The first groove 510 creates a mechanical interlocking effect, which, combined with the chemical bonding force of the vulcanization process, further enhances the connection strength between the inner circumference 610 and the first mounting base 500. Especially when the vehicle is bumpy, it can effectively resist the tensile or compressive stress caused by air pressure changes in the sealing film 600, reducing the risk of detachment.

[0061] In the first embodiment, a first mounting base 500 is arranged around the piston rod 210, and a first groove 510 is provided on the inner peripheral side of the first mounting base 500. In the radial direction of the piston rod 210, the gap between the inner peripheral side of the first mounting base 500 and the outer peripheral side of the piston rod 210 is smaller than the size of the inner peripheral portion 610.

[0062] During vehicle operation, the piston rod 210 may experience radial oscillation due to vibration. If there is a large gap between the inner circumference 610 and the surrounding structure, it may shift with the oscillation, or even dislodge from the first groove 510. In this design, the gap between the inner circumference of the first mounting base 500 and the outer circumference of the piston rod 210 is smaller than the size of the inner circumference 610. The inner circumference 610 is confined between the first mounting base 500 and the piston rod 210, and its radial displacement is strictly limited. Even if the piston rod 210 oscillates slightly, the inner circumference 610 can be stably constrained within the first groove 510, preventing loosening of the connection due to displacement.

[0063] In the first embodiment, the air spring damper assembly 100 further includes a first sealing ring 730, which connects the inner peripheral side of the first mounting base 500 and the outer peripheral side of the piston rod 210.

[0064] The air spring assembly 300 needs to maintain a certain air pressure to achieve the function of buffering and damping. If the seal between the first mounting base 500 and the piston rod 210 is not good, it may lead to internal gas leakage or external dust, moisture and other substances entering.

[0065] The first sealing ring 730 fills the gap between the two through elastic deformation, forming a reliable sealing barrier that effectively prevents the internal gas of the air spring assembly 300 from leaking out, while preventing external contaminants from entering, thus ensuring the normal operating pressure and service life of the air spring assembly 300.

[0066] In one example, the piston rod 210 includes a first rod segment 211 and a second rod segment 212 connected in sequence. The outer diameter of the first rod segment 211 is larger than that of the second rod segment 212. The first mounting base 500 is provided with a stepped hole, which includes a first hole segment and a second hole segment. The diameter of the first hole segment is larger than that of the second hole segment. The first rod segment 211 is located in the first hole segment, and the second rod segment 212 is located in the second hole segment. The first rod segment 211 is also positioned opposite to the bottom of the hole in the first hole segment. A second sealing groove 520 is formed on the inner circumferential side of the first hole segment, and a first sealing ring 730 is located in the second sealing groove 520.

[0067] In the first embodiment, the sealing membrane 600 is clearance-fitted with the piston rod 210.

[0068] Thus, the sealing membrane 600 and the piston rod 210 will not form a seal, preventing the sealing membrane 600 from affecting the sealing test results of the first sealing ring 730. It is understandable that the aging rate of the sealing membrane 600 and the first sealing ring 730 may be faster than the aging rate of the first sealing ring 730 itself. If the first sealing ring 730 and the piston rod 210 are interference-fitted, the failure of the first sealing ring 730 may go undetected, leading to the first sealing ring 730 being mistakenly considered intact. Once the first sealing ring 730 ages, it will cause gas leakage within the air spring assembly 300, affecting the normal operation of the air spring assembly 300.

[0069] In the first embodiment, during the movement of the piston rod 210, the area of ​​the first mounting seat 500 that can contact the membrane body 620 is smoothly arranged.

[0070] The membrane body 620 is typically made of flexible elastic materials (such as rubber or composite elastomers), which are relatively soft and sensitive to mechanical damage. When the piston rod 210 moves (such as axial extension or radial micro-oscillation), if the contact area of ​​the first mounting seat 500 has sharp edges, protrusions, or rough surfaces, the membrane body 620 is easily scratched or cut when it comes into contact with that area, or it may become locally thinned and age faster due to repeated friction, which may eventually lead to air leakage or structural failure.

[0071] Smooth designs (such as rounded corners and polished surfaces) reduce sharp structures and ensure a continuous contour in the contact area, significantly reducing mechanical damage to the membrane body 620. Even when the two are in frequent contact during movement, it is only a low-friction contact between a flexible material and a smooth, hard surface, significantly reducing the wear rate of the membrane body 620 and extending the service life of the sealing membrane 600.

[0072] In one example, the first mounting base 500 has a first end side, a first inner peripheral side, and a first outer peripheral side. The first end side connects the first inner peripheral side and the first outer peripheral side. A first groove 510 is formed on the first inner peripheral side. The first end side is disposed opposite to the membrane body 620. Both the first inner peripheral side and the first outer peripheral side have a smooth transition with the first end side. In one example, a rounded corner is provided at the connection between the first inner peripheral side and the first end side to make the first inner peripheral side and the first end side a smooth transition. A rounded corner is also provided at the connection between the first outer peripheral side and the first end side to make the first outer peripheral side and the first end side a smooth transition.

[0073] In the first embodiment, the support base 400 further includes a first annular portion 410 and a second annular portion 420. Along the axial direction of the piston rod 210, the first annular portion 410 and the second annular portion 420 are connected in sequence. Both the first annular portion 410 and the second annular portion 420 surround the piston rod 210. The first annular portion 410 has a first cavity 411, and the second annular portion 420 has a clearance hole 421. The clearance hole 421 communicates with the first cavity 411. The inner diameter of the clearance hole 421 is smaller than the inner diameter of the first cavity 411. The outer peripheral portion 630 is provided in the first cavity 411.

[0074] Thus, the radial dimension of the first cavity 411 is relatively large, which facilitates the layout of the outer periphery 630 and helps to improve the assembly efficiency of the air spring damper assembly 100.

[0075] In the first embodiment, the air spring damper assembly 100 further includes a second mounting base 710, which is disposed in the first cavity 411, and the outer peripheral portion 630 is fixed to the support base 400 through the second mounting base 710.

[0076] It is understandable that the outer periphery 630 is fixed to the support base 400 by the second mounting base 710, which helps to reduce the structural complexity of the support base 400 and thus reduce the manufacturing difficulty of the support base 400.

[0077] In the first embodiment, along the axial direction of the piston rod 210, the second mounting seat 710 presses the outer peripheral portion 630 against the second annular portion 420.

[0078] The second mounting base 710 axially presses the outer peripheral portion 630 tightly against the second annular portion 420, which is equivalent to applying a continuous axial preload to the outer peripheral portion 630. This constraint can effectively resist the axial tension generated by the membrane body 620 when the air spring is inflated or deflated, as well as the axial vibration load when the vehicle is bumpy, and prevent the outer peripheral portion 630 from axially moving within the first cavity 411, ensuring that it is always in the designed sealed position.

[0079] After the outer peripheral portion 630 is axially pressed, it will generate greater contact pressure with the second annular portion 420. This pressure will cause the outer peripheral portion 630 to undergo elastic deformation, thereby filling any tiny gaps that may exist on the contact surface (such as residual textures from the machining of the support base 400, or minor unevenness of the outer peripheral portion 630 itself), further blocking the gas leakage path, and significantly improving the sealing performance, especially under high-pressure conditions of the air spring.

[0080] In the first embodiment, along the axial direction of the piston rod 210, the second mounting base 710 is provided with a first fixing groove 711 on the side near the second annular portion 420, and the outer peripheral portion 630 is provided in the first fixing groove 711.

[0081] The bottom of the first fixing groove 711 engages with the second annular portion 420, restricting the movement of the outer peripheral portion 630 in the axial direction of the piston rod 210; the two side walls of the first fixing groove 711 restrict the expansion or contraction of the outer peripheral portion 630 in the radial direction of the piston rod 210.

[0082] In the first embodiment, along the axial direction of the piston rod 210, the second annular portion 420 is provided with a first sealing groove 422 on the side near the second mounting base 710, and the outer peripheral portion 630 is provided in the first sealing groove 422.

[0083] The bottom of the first sealing groove 422 engages with the second mounting base 710, restricting the movement of the outer peripheral portion 630 in the axial direction of the piston rod 210; the two side walls of the first sealing groove 422 restrict the expansion or contraction of the outer peripheral portion 630 in the radial direction of the piston rod 210.

[0084] Furthermore, the air spring assembly 300 needs to maintain a certain air pressure to achieve its cushioning and vibration damping function. If the sealing membrane 600 and the support base 400 do not seal properly, internal gas leakage or intrusion of external dust, moisture, etc., may occur. The outer peripheral portion 630 is located in the first sealing groove 422, forming a reliable sealing barrier that effectively prevents internal gas leakage from the air spring assembly 300 and prevents external contaminants from entering, ensuring the normal operating pressure and service life of the air spring assembly 300.

[0085] In the first embodiment, the air spring damper assembly 100 further includes a limiting member 720, which is fixed to the support base 400. Along the axial direction of the piston rod 210, the opposite ends of the mounting base contact the limiting member 720 and the second annular portion 420, respectively.

[0086] The limiting member 720 and the second annular portion 420 axially secure the second mounting base 710 in a preset position. The limiting member 720 restricts the second mounting base 710 from moving away from the second annular portion 420, while the second annular portion 420 restricts its movement in the opposite direction.

[0087] This bidirectional constraint can effectively resist the alternating axial force during the inflation and deflation of the air spring, the impact load generated by vehicle vibration, and even the shrinkage force generated after the sealing film 600 ages, preventing the second mounting seat 710 from axially loosening or shifting within the first cavity 411.

[0088] In the first embodiment, the inner circumferential side of the first annular portion 410 is provided with a mounting groove 412, and the limiting member 720 is provided in the mounting groove 412.

[0089] The mounting groove 412 provides a receiving space and positioning reference for the limiting member 720, and its dimensions can match the shape of the limiting member 720 (e.g., the width and depth correspond to the thickness and height of the limiting member 720). After the limiting member 720 is embedded in the mounting groove 412, it ensures that the axial distance between the limiting member 720 and the second annular portion 420 is constant, providing a stable bidirectional clamping reference for the second mounting base 710.

[0090] In the first embodiment, during the movement of the piston rod 210, the area where the second mounting seat 710 can contact the membrane body 620 is smoothly arranged.

[0091] The membrane body 620 is typically made of flexible elastic materials (such as rubber or composite elastomers), which are relatively soft and sensitive to mechanical damage. When the piston rod 210 moves (such as axial extension or radial micro-oscillation), if the contact area of ​​the second mounting seat 710 has sharp edges, protrusions, or rough surfaces, the membrane body 620 is easily scratched or cut when it comes into contact with that area, or it may become locally thinned and age faster due to repeated friction, which may eventually lead to air leakage or structural failure.

[0092] Smooth designs (such as rounded corners and polished surfaces) reduce sharp structures and ensure a continuous contour in the contact area, significantly reducing mechanical damage to the membrane body 620. Even when the two are in frequent contact during movement, it is only a low-friction contact between a flexible material and a smooth, hard surface, significantly reducing the wear rate of the membrane body 620 and extending the service life of the sealing membrane 600.

[0093] In one example, the second annular portion 420 has a second end side, a third end side, and a second inner peripheral side, with at least one of the second end side and the third end side having a smooth transition with the second inner peripheral side.

[0094] In the first embodiment, during the movement of the piston rod 210, the area of ​​the second annular portion 420 that can contact the membrane body 620 is smoothly arranged.

[0095] The membrane body 620 is typically made of flexible elastic materials (such as rubber or composite elastomers), which are relatively soft and sensitive to mechanical damage. When the piston rod 210 moves (such as axial extension or radial micro-oscillation), if the contact area of ​​the second annular portion 420 has sharp edges, protrusions, or rough surfaces, the membrane body 620 is easily scratched or cut when it comes into contact with that area, or it may become locally thinned and age faster due to repeated friction, which may eventually lead to air leakage or structural failure.

[0096] Smooth designs (such as rounded corners and polished surfaces) reduce sharp structures and ensure a continuous contour in the contact area, significantly reducing mechanical damage to the membrane body 620. Even when the two are in frequent contact during movement, it is only a low-friction contact between a flexible material and a smooth, hard surface, significantly reducing the wear rate of the membrane body 620 and extending the service life of the sealing membrane 600.

[0097] In one example, the second annular portion 420 has a second end side, a third end side, and a second inner peripheral side. The second inner peripheral side has a clearance hole 421. At least one of the second end side and the third end side is smoothly transitioned to the second inner peripheral side. A rounded corner is provided at the connection between the second end side and the second inner peripheral side to ensure a smooth transition. A rounded corner is also provided at the connection between the third end side and the second inner peripheral side to ensure a smooth transition.

[0098] In the first embodiment, the membrane body 620 is at least partially disposed within the clearance hole 421. This makes full use of the space in the clearance hole 421, resulting in a more compact air spring assembly 300.

[0099] In the first embodiment, the portion of the membrane body 620 located within the clearance hole 421 is bent. This allows the membrane body 620 to follow the piston rod 210 along a preset trajectory.

[0100] In the first embodiment, the first mounting base 500 can enter and exit the clearance hole 421. When the first mounting base 500 is at least partially inserted into the clearance hole 421, the single-sided gap between the outer peripheral side of the first mounting base 500 and the hole wall of the clearance hole 421 is between 4 mm and 6 mm.

[0101] The first mounting base 500 moves axially along the piston rod 210, and the piston rod 210 may experience slight radial oscillation when the vehicle vibrates. If the clearance is too small, the outer periphery of the first mounting base 500 may rigidly collide and rub against the inner periphery of the clearance hole 421 due to the machining tolerance of the first mounting base 500 or the clearance hole 421, or the radial runout of the piston rod 210, causing wear or jamming of the components, hindering the movement of the piston rod 210, and affecting the function of the shock absorber 200.

[0102] The 4mm to 6mm single-sided clearance provides ample tolerance for such motion errors and runout: even with machining deviations or vibration runout, the first mounting base 500 can move freely within the clearance hole 421, avoiding rigid contact, ensuring smooth extension and retraction of the piston rod 210, and guaranteeing the response speed and buffering effect of the vibration damper 200. Furthermore, the 4mm to 6mm clearance can fully accommodate the deformation of the membrane body 620.

[0103] In one example, the value of the single-sided gap may be, but is not limited to, 4mm, 4.5mm, 5mm, 5.5mm or 6mm.

[0104] In the first embodiment, the support base 400 further includes a third annular portion 430. Along the axial direction of the piston rod 210, a second annular portion 420 is disposed between the first annular portion 410 and the third annular portion 430. The third annular portion 430 surrounds the piston rod 210 and has a second cavity 431. The two ends of the clearance hole 421 are respectively connected to the first cavity 411 and the second cavity 431. The first cavity 411 is configured as an air cavity, and the second cavity 431 is configured as a vibration isolation cavity.

[0105] Thus, the outer periphery 630 is located in the air cavity, which helps to improve the space utilization of the air cavity.

[0106] In the first embodiment, the air spring damper assembly 100 further includes a vibration isolation member 760, which is disposed in the vibration isolation cavity. Along the axial direction of the piston rod 210, the two sides of the first mounting seat 500 are in contact with the vibration isolation member 760 and the piston rod 210, respectively.

[0107] The vibration isolator 760 blocks the vibrations and impacts transmitted to the vehicle body by the shock absorber 200, reducing vehicle body vibration and improving ride comfort. In addition, the vibration isolator 760 also cooperates with the piston rod 210 to prevent the first mounting seat 500 from moving axially on the piston rod 210.

[0108] In one example, the vibration isolator 760 includes an inner frame 763, a top rubber 762, and an outer frame 761. The outer frame 761 is mounted on the inner circumference of the vibration isolation cavity, the inner frame 763 is disposed on the piston rod 210, and the top rubber 762 is disposed between the outer frame 761 and the inner frame 763, connecting the outer frame 761 and the inner frame 763. Along the piston axial direction, both sides of the first mounting seat 500 contact the inner frame 763 and the first rod segment 211 of the piston rod 210, respectively. The vibration isolator 760 not only performs the function of buffering and isolating vibrations but also performs a sealing function to maintain a certain air pressure inside the air spring assembly 300. Thus, the sealing film 600 can isolate the air spring assembly 300 from other substances and oil vapor evaporation, thereby reducing erosion of the top rubber 762 and extending its service life.

[0109] In the first embodiment, the vibration damper 200 is configured as an electronically controlled vibration damper 200. In one example, the vibration damper 200 is configured as a built-in electronically controlled vibration damper 200. It should be noted that the solenoid valve of the built-in electronically controlled vibration damper 200 is inside the vibration damper 200.

[0110] In the first embodiment, the air spring assembly 300 further includes a screw 810, an upper clamping ring 820, a spring skin 830, a spring skin guide sleeve 840, and a dust cover 850. The mounting positions and methods of the screw 810, upper clamping ring 820, spring skin 830, spring skin guide sleeve 840, and dust cover 850 can be, but are not limited to, referring to related technologies, and will not be described in detail here. The air spring shock absorber assembly 100 also includes a lower fork 860, which is connected to the shock absorber 200.

[0111] In the first embodiment, at least one of the support base 400 and the first mounting base 500 is integrally vulcanized with the sealing film 600. Integral vulcanization connects at least two components through chemical bonding, resulting in a high-strength structure after integral molding.

[0112] However, this design is not limited to this. In some other embodiments, the integral molding method can be, but is not limited to, referring to relevant technologies. It is not limited here, as long as at least one of the support base 400 and the first mounting base 500 can be integrally molded with the sealing film 600.

[0113] Reference Figure 4 and 5 This disclosure also provides a second embodiment, in which the similarities between the second embodiment and the first embodiment can be referred to the first embodiment. The differences between the second embodiment and the first embodiment are described below.

[0114] In the second embodiment, the outer peripheral side of the second mounting base 710 is connected to the inner peripheral side of the first annular portion 410 by a thread.

[0115] The threaded connection tightly locks the second mounting base 710 and the first annular portion 410 together through a helical pair. Compared with simple snap-fit ​​or crimping, it can provide greater axial preload and ensure the stable position of the second mounting base 710.

[0116] During assembly, simply screw the second mounting base 710 into the first annular part 410. With the guiding effect of the thread, positioning and fixing can be easily completed without the need for complex tooling.

[0117] Reference Figure 6 and 7 This disclosure also provides a third embodiment. The similarities between the third embodiment and the first embodiment can be referred to the first embodiment. The differences between the third embodiment and the first embodiment are described below.

[0118] In the third embodiment, the support base 400 is provided with a second groove 423, and the outer peripheral portion 630 is provided in the second groove 423.

[0119] The second groove 423 provides a precise installation positioning space for the inner circumference 610 of the sealing membrane 600.

[0120] In one example, during vulcanization molding, the second groove 423 allows for a larger contact area and tighter fit between the outer periphery 630 and the support 400, preventing misalignment or loosening of the outer periphery 630 during assembly or use. The second groove 423 creates a mechanical interlocking effect, which, combined with the chemical bonding force of the vulcanization process, further enhances the connection strength between the outer periphery 630 and the support 400. Especially when the vehicle is bumpy, it can effectively resist the tensile or compressive stress of the sealing film 600 caused by air pressure changes, reducing the risk of detachment. The second annular portion 420 has the second groove 423.

[0121] Reference Figure 8 This disclosure also provides a fourth embodiment, in which the similarities between the fourth embodiment and the first embodiment can be referred to the first embodiment. The differences between the fourth embodiment and the first embodiment are described below.

[0122] In the fourth embodiment, the support base 400 further includes a third annular portion 430. Along the axial direction of the piston rod 210, a second annular portion 420 is disposed between the first annular portion 410 and the third annular portion 430. The third annular portion 430 surrounds the piston rod 210 and has a second cavity 431. The two ends of the clearance hole 421 are respectively connected to the first cavity 411 and the second cavity 431. The first cavity 411 is configured as a vibration isolation cavity, and the second cavity 431 is configured as an air cavity.

[0123] Thus, the outer periphery 630 is located in the vibration isolation cavity, which helps to improve the space utilization of the vibration isolation cavity.

[0124] In the fourth embodiment, along the radial direction of the piston rod 210, the second mounting seat 710 presses the outer peripheral portion 630 against the first annular portion 410.

[0125] The second mounting base 710 radially presses the outer peripheral portion 630 tightly against the first annular portion 410, which is equivalent to applying a continuous radial preload to the outer peripheral portion 630. This constraint can effectively resist the radial tension generated by the membrane body 620 when the air spring is inflated or deflated, as well as the radial vibration load when the vehicle is bumpy, and prevent the outer peripheral portion 630 from radially moving within the first cavity 411, ensuring that it is always in the designed sealed position.

[0126] After the outer peripheral portion 630 is radially pressed, it will generate greater contact pressure with the first annular portion 410. This pressure will cause the outer peripheral portion 630 to undergo elastic deformation, thereby filling any tiny gaps that may exist on the contact surface (such as residual textures from the machining of the support base 400, or minor unevenness of the outer peripheral portion 630 itself), further blocking the gas leakage path, and significantly improving the sealing performance, especially under high-pressure conditions of the air spring.

[0127] In the fourth embodiment, the air spring damper assembly 100 further includes a second sealing ring 740, which is disposed between the outer peripheral side of the second mounting base 710 and the inner peripheral side of the first annular portion 410.

[0128] The air spring assembly 300 needs to maintain a certain air pressure to achieve the function of buffering and vibration reduction. If the second mounting base 710 and the first annular part 410 are not properly sealed, it may lead to internal gas leakage or external dust, moisture and other substances entering.

[0129] The second sealing ring 740 fills the gap between the two through elastic deformation, forming a reliable sealing barrier that effectively prevents the internal gas of the air spring assembly 300 from leaking out, while preventing external contaminants from entering, thus ensuring the normal operating pressure and service life of the air spring assembly 300.

[0130] It can be understood that the second sealing ring 740 achieves a seal between the second mounting seat 710 and the first annular portion 410 in the radial direction of the piston rod 210.

[0131] Reference Figure 9 This disclosure also provides a fifth embodiment. The similarities between the fifth embodiment and the first embodiment can be referred to the first embodiment. The differences between the fifth embodiment and the first embodiment are described below.

[0132] In the fifth embodiment, the support base 400 further includes a third annular portion 430. Along the axial direction of the piston rod 210, a second annular portion 420 is disposed between the first annular portion 410 and the third annular portion 430. The third annular portion 430 surrounds the piston rod 210 and has a second cavity 431. The two ends of the clearance hole 421 are respectively connected to the first cavity 411 and the second cavity 431. The first cavity 411 is configured as a vibration isolation cavity, and the second cavity 431 is configured as an air cavity.

[0133] Thus, the outer periphery 630 is located in the vibration isolation cavity, which helps to improve the space utilization of the vibration isolation cavity.

[0134] In the fifth embodiment, the second mounting base 710 is provided with a second fixing groove 712, and the outer peripheral portion 630 is fixed in the second fixing groove 712. In this way, the outer portion is fixed in the second fixing groove 712, which helps to improve the connection stability between the second mounting base 710 and the outer peripheral portion 630.

[0135] In the fifth embodiment, the air spring damper assembly 100 further includes a third sealing ring 750, which is disposed between the second mounting and the second annular portion 420 along the axial direction of the piston rod 210.

[0136] The air spring assembly 300 needs to maintain a certain air pressure to achieve the function of buffering and vibration reduction. If the seal between the second mounting base 710 and the second annular part 420 is not good, it may lead to internal gas leakage or external dust, moisture and other substances entering.

[0137] The third sealing ring 750 fills the gap between the two through elastic deformation, forming a reliable sealing barrier that effectively prevents gas leakage from the air spring assembly 300 and prevents external contaminants from entering, ensuring the normal operating pressure and service life of the air spring assembly 300.

[0138] It is understood that the third sealing ring 750 achieves a seal between the second mounting seat 710 and the second annular portion 420 in the axial direction of the piston rod 210.

[0139] According to a second aspect of this application, a suspension system is provided, including the aforementioned air spring shock absorber assembly 100.

[0140] According to a third aspect of this application, a vehicle is also provided, including the aforementioned suspension system.

[0141] According to a second aspect of this disclosure, a suspension system is provided that includes the aforementioned air spring damper assembly 100. This suspension system possesses all the beneficial effects of the aforementioned air spring damper assembly 100, which will not be elaborated further herein.

[0142] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned suspension system. The vehicle possesses all the beneficial effects of the aforementioned suspension system, which will not be elaborated further herein.

[0143] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.

[0144] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0145] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0146] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0147] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An air spring shock absorber assembly characterized by, include: Vibration damper; as well as An air spring assembly includes a support base, a first mounting base, and a sealing diaphragm. The support base is used to connect to the vehicle body and has a clearance hole. The piston rod of the shock absorber passes through the clearance hole, and the first mounting base is disposed on the piston rod. The sealing membrane includes an inner peripheral portion, a membrane body, and an outer peripheral portion connected in sequence. The inner peripheral portion is connected to the first mounting base, and the outer peripheral portion is connected to the support base. At least one of the support base and the first mounting base is integrally formed with the sealing membrane.

2. The air spring shock absorber assembly of claim 1, wherein, The first mounting base has a first groove, and the inner circumference is located in the first groove.

3. The air spring shock absorber assembly of claim 2, wherein, The first mounting base is arranged around the piston rod, and the first groove is formed on the inner circumferential side of the first mounting base. In the radial direction of the piston rod, the gap between the inner circumferential side of the first mounting base and the outer circumferential side of the piston rod is smaller than the size of the inner circumferential portion.

4. The air spring shock absorber assembly of claim 3, wherein, The air spring damper assembly also includes a first sealing ring, which connects the inner circumferential side of the first mounting base and the outer circumferential side of the piston rod; And / or, the sealing membrane is clearance-fitted with the piston rod.

5. The air spring shock absorber assembly of claim 2, wherein, During the movement of the piston rod, the area where the first mounting seat can contact the membrane body is smoothly arranged.

6. The air spring shock absorber assembly of claim 1, wherein, The support base further includes a first annular portion and a second annular portion. Along the axial direction of the piston rod, the first annular portion and the second annular portion are connected in sequence. Both the first annular portion and the second annular portion surround the piston rod. The first annular portion has a first cavity, and the second annular portion has the clearance hole. The clearance hole communicates with the first cavity. The inner diameter of the clearance hole is smaller than the inner diameter of the first cavity. The outer peripheral portion is provided in the first cavity.

7. The air spring shock absorber assembly of claim 6, wherein, The air spring shock absorber assembly also includes a second mounting base, which is disposed in the first cavity, and the outer periphery is fixed to the support base by the second mounting base.

8. The air spring shock absorber assembly of claim 7, wherein, Along the axial direction of the piston rod, the second mounting seat presses the outer peripheral portion against the second annular portion.

9. The air spring shock absorber assembly of claim 8, wherein, Along the axial direction of the piston rod, the second mounting seat is provided with a first fixing groove on the side near the second annular portion, and the outer peripheral portion is provided in the first fixing groove; And / or, along the axial direction of the piston rod, the second annular portion is provided with a first sealing groove on the side near the second mounting seat, and the outer peripheral portion is provided in the first sealing groove.

10. The air spring shock absorber assembly of claim 7, wherein, Along the radial direction of the piston rod, the second mounting seat presses the outer peripheral portion against the first annular portion; And / or, the second mounting base is provided with a second fixing groove, and the outer peripheral portion is fixed to the second fixing groove.

11. The air spring shock absorber assembly of claim 7, wherein, The air spring damper assembly also includes a limiting member, which is fixed to the support base. Along the axial direction of the piston rod, the opposite two ends of the mounting base contact the limiting member and the second annular portion, respectively.

12. The air spring shock absorber assembly of claim 11, wherein, The inner circumferential side of the first annular portion is provided with a mounting groove, and the limiting member is provided in the mounting groove.

13. The air spring shock absorber assembly of claim 7, wherein, The air spring damper assembly also includes a second sealing ring, which is disposed between the outer peripheral side of the second mounting base and the inner peripheral side of the first annular portion; And / or, the air spring damper assembly further includes a third sealing ring along the axial direction of the piston rod, the third sealing ring being disposed between the second mounting and the second annular portion.

14. The air spring shock absorber assembly of claim 7, wherein, The outer peripheral side of the second mounting base is connected to the inner peripheral side of the first annular portion by a thread; And / or, during the movement of the piston rod, the area where the second mounting seat can contact the membrane body is smoothly arranged.

15. The air spring shock absorber assembly of claim 6, wherein, During the movement of the piston rod, the area where the second annular portion can contact the membrane body is smoothly arranged.

16. The air spring shock absorber assembly of claim 15, wherein, The membrane body is at least partially disposed within the clearance hole.

17. The air spring shock absorber assembly of claim 16, wherein, The portion of the membrane body located within the clearance hole is bent.

18. The air spring shock absorber assembly of claim 16, wherein, The first mounting base can enter and exit the clearance hole. When the first mounting base is at least partially inserted into the clearance hole, the single-sided gap between the outer peripheral side of the first mounting base and the hole wall of the clearance hole is between 4 mm and 6 mm.

19. The air spring damper assembly according to claim 6, characterized in that, The support also includes a third annular portion along the axial direction of the piston rod. The second annular portion is disposed between the first annular portion and the third annular portion. The third annular portion surrounds the piston rod and has a second cavity. The two ends of the clearance hole are respectively connected to the first cavity and the second cavity. One of the first cavity and the second cavity is configured as an air cavity, and the other is configured as a vibration isolation cavity.

20. The air spring shock absorber assembly of claim 19, wherein, The air spring damper assembly also includes a vibration isolation component, which is disposed in the vibration isolation cavity along the axial direction of the piston rod. The two sides of the first mounting seat are in contact with the vibration isolation component and the piston rod, respectively.

21. The air spring shock absorber assembly of claim 1, wherein, The support base is provided with a second groove, and the outer peripheral portion is provided in the second groove.

22. The air spring shock absorber assembly of any one of claims 1 to 21, wherein, The vibration damper is configured as an electronically controlled vibration damper; And / or, at least one of the support and the first mounting base is integrally formed with the sealing film by vulcanization.

23. A suspension system characterized by, Includes the air spring damper assembly as described in any one of claims 1 to 22.

24. A vehicle characterized by Including the suspension system as described in claim 23.

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