Rear air spring double-chamber structure

Abstract

The present invention provides a rear air spring double-chamber structure, which includes an upper solenoid valve mounting seat, a lower solenoid valve mounting seat, a solenoid valve, a bladder, and a lower end cover. The bladder, the lower solenoid valve mounting seat, the solenoid valve, and the lower end cover together form a sealed first air chamber, and the upper solenoid valve mounting seat, the lower solenoid valve mounting seat, and the solenoid valve together form a sealed second air chamber. A first segmented air passage is formed on the upper solenoid valve mounting seat, and a second segmented air passage is formed on the lower solenoid valve mounting seat. The first segmented air passage and the second segmented air passage together constitute a complete air passage for inflating the first air chamber, and an air passage sealing structure is provided at the junction of the first segmented air passage and the second segmented air passage. Through the design of the air passage sealing structure, the present invention seals the air passage to improve the airtightness of the air passage, ensures the absolute independence of the two air chambers, and will not affect the stiffness of the air spring when the air spring switches to the independent operation of the first air chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of air springs, and particularly to a double-chamber structure of a rear air spring. Background Art

[0002] An air spring is a non-metallic spring that realizes vibration isolation and buffering functions by adding high-pressure air into a flexible sealed container and utilizing the compressibility of air. Since a vehicle often quickly switches between different driving modes during driving, and the stiffness of the air spring corresponding to different driving modes is different, the air spring needs to react immediately to adapt to the rapid switching of the vehicle driving mode. Currently, a double-chamber air spring with adjustable stiffness has been developed. The problem of the existing double-chamber air spring is that the sealing performance of the two chambers is not good, resulting in the connection of the two chambers and the inability to form absolutely independent chambers. When the double-chamber air spring switches to single-chamber operation, it will affect the stiffness. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and propose a double-chamber structure of a rear air spring, which can improve the sealing performance of the air passage and form two absolutely independent chambers.

[0004] To achieve the above purpose, the present invention adopts the following specific technical solutions:

[0005] The double-chamber structure of the rear air spring provided by the present invention includes an electromagnetic valve upper mounting seat, an electromagnetic valve lower mounting seat, an electromagnetic valve, a bladder, and a lower end cover. Both ends of the bladder are respectively sealed and clamped on the outer walls of the electromagnetic valve lower mounting seat and the lower end cover. The electromagnetic valve is installed on the bottom end face of the electromagnetic valve lower mounting seat. The top end of the electromagnetic valve is hermetically connected to the electromagnetic valve upper mounting seat, and the bottom end of the electromagnetic valve is hermetically connected to the electromagnetic valve lower mounting seat. The bladder, the electromagnetic valve lower mounting seat, the electromagnetic valve, and the lower end cover jointly form a sealed first air chamber. The electromagnetic valve upper mounting seat, the electromagnetic valve lower mounting seat, and the electromagnetic valve jointly form a sealed second air chamber. The electromagnetic valve controls the connection and disconnection between the second air chamber and the first air chamber. A first segmented air passage is formed on the electromagnetic valve upper mounting seat, and a second segmented air passage is formed on the electromagnetic valve lower mounting seat. The first segmented air passage and the second segmented air passage jointly constitute a complete air passage for inflating the first air chamber. An air passage sealing structure is provided at the junction of the first segmented air passage and the second segmented air passage.

[0006] Preferably, the air passage sealing structure is an axial protrusion formed on the electromagnetic valve upper mounting seat and extending into the second segmented air passage. The sealing of the junction of the first segmented air passage and the second segmented air passage is achieved through the interference fit between the axial protrusion and the second segmented air passage.

[0007] Preferably, the airway sealing structure includes a first airway sealing ring, a second airway sealing ring, an airway upper seat, and an airway lower seat; wherein, the airway upper seat is threadedly connected to the first segmented airway, the airway lower seat is sleeved into the first segmented airway and the second segmented airway from top to bottom in sequence. Two sealing grooves are provided on the airway lower seat, and the first airway sealing ring and the second airway sealing ring are respectively installed in the two sealing grooves. The first airway sealing ring forms a sealed connection with the first segmented airway, and the second airway sealing ring forms a sealed connection with the second segmented airway. The sealed connection of the two realizes the sealing of the junction of the first segmented airway and the second segmented airway.

[0008] Preferably, the airway sealing structure is a steel ring, and the steel ring is sleeved into the first segmented airway and the second segmented airway from top to bottom in sequence. Through the interference fit of the steel ring with the first segmented airway and the second segmented airway, the sealing of the junction of the first segmented airway and the second segmented airway is realized.

[0009] Preferably, a wire harness groove is provided on the top end face of the mounting seat of the solenoid valve, and the wire harness groove is provided with a stepped structure for waterproofing.

[0010] Preferably, the rear air spring double-chamber structure further includes a protective cylinder, an upper dust cover, an upper dust cover gasket, and a lower dust cover; wherein, the protective cylinder is sleeved on the outer periphery of the bladder and is fixedly clamped with the bladder; the upper dust cover is sleeved on the outer periphery of the protective cylinder, the upper end of the upper dust cover is fixedly connected to the mounting seat of the solenoid valve, and the lower end of the upper dust cover is fixedly connected to the upper dust cover gasket; the upper dust cover gasket is an annular structure composed of two semi-circular structures, and a gasket groove is provided on the outer wall of the protective cylinder, and the annular structure is inserted into the gasket groove; the lower dust cover is sleeved on the outer periphery of the bladder and the part not protected by the protective cylinder, the lower end of the lower dust cover is fixedly connected to the lower end cover, and the upper end of the lower dust cover is fixedly connected to the protective cylinder.

[0011] Preferably, the protective cylinder is fixedly clamped inside the bladder through a protective cylinder clamping ring; the protective cylinder forms a local special-shaped structure for adjusting the internal clearance of the rear air spring double-chamber structure and the external clearance between the rear air spring double-chamber structure and the suspension peripheral parts; the upper end of the upper dust cover is clamped and fixed to the mounting seat of the solenoid valve, and the lower end of the upper dust cover is fixedly connected to the upper dust cover gasket through an upper hoop; the lower end of the lower dust cover is clamped and fixed to the lower end cover, and the upper end of the lower dust cover is fixedly connected to the lower end of the protective cylinder through a lower hoop. The lower end of the protective cylinder is bent outward to form a limiting protrusion for limiting the lower hoop; a circle of threads is provided on the lower end cover, and one end of the bladder is clamped tightly on the threads of the lower end cover through a lower end cover clamping ring, and a steel ring for enhancing strength is embedded at the threads of the lower end cover; the base gasket ring is sleeved on the outer periphery of the lower end cover clamping ring, and the bottom surface of the base gasket ring abuts against the lower end cover; the longitudinal section of the base gasket ring is a smooth right triangle, and the surface of the base gasket ring in contact with the bladder is an arc surface or a flat surface.

[0012] Preferably, a spring washer is sleeved on the mounting seat of the solenoid valve. The spring washer completely wraps the clamping joint between the upper dust cover and the mounting seat of the solenoid valve. The upper end structure of the spring washer matches the body interface. The lower end of the spring washer is bent inward to form an inward protrusion, and the inward protrusion is clamped and matched with the upper dust cover; the upper end edge of the spring washer is bent to form a wire harness protrusion for matching the routing of the vehicle wiring harness.

[0013] Preferably, the solenoid valve is axially fixed on the bottom end face of the lower mounting seat of the solenoid valve through a solenoid valve stopper and a wire spring clip. The top end of the solenoid valve is hermetically connected to the upper mounting seat of the solenoid valve through a first sealing ring; the bottom end of the solenoid valve is hermetically connected to the lower mounting seat of the solenoid valve through a second sealing ring; both the upper mounting seat and the lower mounting seat of the solenoid valve are aluminum parts. The top end of the lower mounting seat of the solenoid valve is inserted into and welded to the upper mounting seat of the solenoid valve to seal the second air chamber.

[0014] Preferably, the double-chamber structure of the rear air spring further includes an upper seat clamping ring, a top seat cushion ring and a piston; wherein, the upper seat clamping ring is a ring structure and is sleeved on the outer wall of the bladder, clamping the bladder tightly on the thread at the lower end of the lower mounting seat of the solenoid valve; the piston is sleeved on the outer wall of the lower mounting seat of the solenoid valve, and the piston is fixedly connected to the lower mounting seat of the solenoid valve in an interference fit manner; the top seat cushion ring is a ring structure and is sleeved on the outer periphery of the upper seat clamping ring. The top seat cushion ring is provided with a radial protrusion, and the radial protrusion is in interference fit with the outer wall of the upper seat clamping ring; the upper surface of the top seat cushion ring abuts against the lower end surface of the piston, and the slope of the upper end of the outer contour of the top seat cushion ring is the same as that of the outer contour of the piston.

[0015] The present invention can achieve the following technical effects:

[0016] 1. Through the design of the air passage sealing structure, the air passage is sealed to improve the airtightness of the air passage, ensure the absolute independence of the two air chambers, and will not affect the stiffness of the air spring when the air spring switches to the first air chamber to work independently;

[0017] 2. The spring washer completely wraps the clamping joint between the upper dust cover and the mounting seat of the solenoid valve, which can prevent water from entering the upper dust cover from this clamping joint;

[0018] 3. Both the body connection part and the upper mounting seat of the solenoid valve are aluminum parts, and the cylindrical part of the upper mounting seat of the solenoid valve has an opening structure. The spring washer can play a waterproof role, and the spring washer is a flexible material, which can avoid direct contact between aluminum parts and avoid bumping;

[0019] 4. The protection cylinder can be designed into a locally special-shaped structure according to the movement stroke of the air spring, which can adjust the internal clearance of the air spring and the external clearance between the air spring and the surrounding parts of the suspension;

[0020] 5. The top seat cushion ring can smoothly transition the bladder to the piston, avoid the generation of friction force and extrusion force when the bladder contacts the bottom end of the piston, and improve the service life of the bladder;

[0021] 6. The base gasket can prevent relative movement between the bladder and the outer wall of the lower end cover crimping ring, and prevent damage caused by friction or extrusion between the up-and-down movement of the bladder and the lower end cover crimping ring. Description of the Drawings

[0022] Figure 1 is a schematic structural view of the rear air spring dual-chamber structure provided in Embodiment 1 of the present invention;

[0023] Figure 2 is a schematic structural view of the wire harness groove provided in Embodiment 1 of the present invention;

[0024] Figure 3 is a schematic structural view of the spring pad provided in Embodiment 1 of the present invention;

[0025] Figure 4 is a schematic structural view of the rear air spring dual-chamber structure provided in Embodiment 2 of the present invention;

[0026] Figure 5 is a schematic structural view of the rear air spring dual-chamber structure provided in Embodiment 3 of the present invention.

[0027] The reference numerals therein include: solenoid valve upper mounting seat 1, solenoid valve lower mounting seat 2, solenoid valve 3, bladder 4, lower end cover 5, first air chamber 6, second air chamber 7, air passage 8, first air passage sealing ring 9, second air passage sealing ring 10, air passage upper seat 11, air passage lower seat 12, solenoid valve stopper 13, wire spring clip 14, first sealing ring 15, second sealing ring 16, wire harness groove 17, protective cylinder 18, upper dust cover 19, upper dust cover gasket 20, lower dust cover 21, protective cylinder crimping ring 22, upper hoop 23, lower hoop 24, base gasket 25, lower end cover crimping ring 26, spring pad 27, upper seat crimping ring 28, top seat gasket 29, piston 30, axial protrusion 31, steel ring 32, wire harness protrusion 33. Detailed Embodiments

[0028] In the following, embodiments of the present invention will be described with reference to the drawings. In the following description, the same modules are denoted by the same reference numerals. In the case of the same reference numerals, their names and functions are also the same. Therefore, their detailed descriptions will not be repeated.

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation to the present invention.

[0030] Embodiment 1

[0031] Figure 1Shows the rear air spring double - chamber structure provided according to Embodiment 1 of the present invention.

[0032] As Figure 1 Shown, the rear air spring double - chamber structure provided in Embodiment 1 of the present invention includes an electromagnetic valve upper mounting seat 1, an electromagnetic valve lower mounting seat 2, an electromagnetic valve 3, a bladder 4, and a lower end cover 5. Both ends of the bladder 4 are respectively sealed and clamped on the outer walls of the electromagnetic valve lower mounting seat 2 and the lower end cover 5. The electromagnetic valve 3 is installed on the bottom end face of the electromagnetic valve lower mounting seat 2. The top end of the electromagnetic valve 3 is hermetically connected to the electromagnetic valve upper mounting seat 1, and the bottom end of the electromagnetic valve 3 is hermetically connected to the electromagnetic valve lower mounting seat 2.

[0033] The bladder 2, the electromagnetic valve lower mounting seat 2, the electromagnetic valve 3, and the lower end cover 5 together form a sealed first air chamber 6 with a volume of V1. The electromagnetic valve upper mounting seat 1, the electromagnetic valve lower mounting seat 2, and the electromagnetic valve 3 together form a sealed second air chamber 7 with a volume of V2. The electromagnetic valve 3 is used to control the connection and disconnection between the second air chamber 7 and the first air chamber 6. A first segmented air passage is formed on the electromagnetic valve upper mounting seat 1, and a second segmented air passage is formed on the electromagnetic valve lower mounting seat 2. The first segmented air passage and the second segmented air passage together constitute a complete air passage 8 for inflating the first air chamber 6, and an air passage sealing structure is provided at the junction of the first segmented air passage and the second segmented air passage.

[0034] The air passage sealing structure includes a first air passage sealing ring 9, a second air passage sealing ring 10, an air passage upper seat 11, and an air passage lower seat 12. Among them, the air passage upper seat 11 is threadedly connected to the first segmented air passage. The air passage lower seat 12 is sleeved into the first segmented air passage and the second segmented air passage from top to bottom. The air passage upper seat 11 is located above the air passage lower seat 12. After tightening the air passage upper seat 11, the lower end face of the air passage upper seat 11 abuts against the upper end face of the air passage lower seat 12, thereby axially fixing the air passage lower seat 12 on the second segmented air passage. Sealing grooves are respectively opened on the air passage lower seat 12 corresponding to the first segmented air passage and the second segmented air passage. The first air passage sealing ring 9 is installed in the sealing groove corresponding to the first segmented air passage, and the first air passage sealing ring 9 forms a sealed connection with the first segmented air passage. The second air passage sealing ring 10 is installed in the sealing groove corresponding to the second segmented air passage, and the second air passage sealing ring 10 forms a sealed connection with the second segmented air passage. The sealing of the junction of the first segmented air passage and the second segmented air passage is achieved through two sealed connections.

[0035] When the electromagnetic valve 3 is not powered on, it is in the normally open mode. At this time, the first air chamber 6 is connected to the second air chamber 7. When inflating the first air chamber 6 through the air passage, the total volume of the air spring is V = V1 + V2. When the electromagnetic valve is powered on, the valve port of the electromagnetic valve is closed. At this time, the first air chamber 6 is not connected to the second air chamber 7. When inflating the first air chamber 6 through the air passage 8, the total volume of the air spring is V = V1.

[0036] Therefore, the total volume of the air spring can be selected as V1 + V2 or V1; when V = V1 is selected, the air spring has a large stiffness and is suitable for the sports mode; when V = V1 + V2 is selected, the air spring has a small stiffness and is suitable for the comfort mode. By connecting or disconnecting the second chamber 7, the switching of the air spring between the comfort and sports modes can be achieved.

[0037] In an example of the present invention, the solenoid valve 3 is axially fixed to the bottom end face of the lower mounting seat 2 of the solenoid valve through the solenoid valve stopper 13 and the wire spring clip 14. The top end of the solenoid valve 3 is hermetically connected to the upper mounting seat 1 of the solenoid valve through the first sealing ring 15; the bottom end of the solenoid valve 3 is hermetically connected to the lower mounting seat 2 of the solenoid valve through the second sealing ring 16; both the upper mounting seat 1 and the lower mounting seat 2 of the solenoid valve are aluminum parts. The top end of the lower mounting seat 2 of the solenoid valve is sleeved into the upper mounting seat 1 of the solenoid valve and welded to the upper mounting seat 1 of the solenoid valve to form a sealed second air chamber V2.

[0038] A circle of threads is provided on the lower end cover 5. One end of the bladder 4 is tightened on the threads of the lower end cover 5 through the lower end cover clamping ring 26. A steel ring for enhancing strength is embedded at the threads of the lower end cover 5. The lower end cover 5 is made of plastic material. The steel ring embedded at the threads can enhance the strength of the threads and prevent the lower end cover 5 from deforming or cracking during clamping.

[0039] A wire harness groove 17 is provided on the top end face of the upper mounting seat 1 of the solenoid valve. As Figure 2 shown, the wire harness groove 17 is used to place the solenoid valve wire harness. A stepped structure is provided on the wire harness groove 17, that is, the bottom of the wire harness groove 17 is non-horizontal, which can achieve the function of waterproofing.

[0040] The double-chamber structure of the rear air spring provided in Embodiment 1 of the present invention further includes a protective cylinder 18, an upper dust cover 19, an upper dust cover gasket 20, a lower dust cover 21, a protective cylinder clamping ring 22, an upper hoop 23 and a lower hoop 24; wherein, the bladder 4 has a certain burst diameter and burst volume, and the protective cylinder 18 is sleeved on the outer periphery of the bladder 4, covering the outer wall of the airbag formed by the bladder 4, and restricting the expansion outer diameter of the bladder. The protective cylinder 18 and the bladder 4 are fixed by an internal clamping method through the protective cylinder clamping ring 22, forming a structure of the protective cylinder clamping ring 22, the airbag and the protective cylinder 18 from the inside to the outside in sequence, and the diameter of the protective cylinder clamping ring 22 remains unchanged before and after clamping. The upper dust cover 19 is sleeved on the outer periphery of the protective cylinder 18, the upper end of the upper dust cover 19 is fixed to the solenoid valve upper mounting seat 1 by means of clamping or the like, the lower end of the upper dust cover 10 is fixed to the outer wall of the protective cylinder 18 by connecting parts such as the upper hoop 23, and the function of the upper dust cover 19 is to prevent dust and water, and protect the bladder 4 from being damaged by being knocked by sharp foreign objects outside. More specifically, the lower end of the upper dust cover 19 is fixed to the upper dust cover gasket 20 by the upper hoop 23. A groove is formed in the protective cylinder 19, and the upper dust cover gasket 20 is a ring structure composed of two semi-circular structures. The upper dust cover gasket 20 is sleeved into the groove of the protective cylinder 19, so that the upper dust cover gasket 20 is fixedly sleeved on the protective cylinder 19.

[0041] The upper dust cover gasket 20 is also provided with labyrinth-shaped ventilation holes to prevent sand and stones from entering the upper dust cover 19.

[0042] The lower dust cover 21 is sleeved on the outer periphery of the airbag and the part not protected by the protective cylinder 18. The lower end of the lower dust cover 21 is fixed to the lower end cover 5 by means of clamping or the like, and the upper end of the lower dust cover 21 is fixed to the outer periphery of the protective cylinder 18 by connecting parts such as the lower hoop 24. Moreover, the lower end of the protective cylinder 18 is bent outward to form a limiting protrusion for limiting the lower hoop 24 and better fixing the lower dust cover 21.

[0043] The base gasket 25 is used to prevent relative movement between the bladder 4 and the outer wall of the lower end cover clamping ring 26. Specifically, the base gasket 25 is sleeved on the outer periphery of the lower end cover clamping ring 26, and the bottom surface of the base gasket 25 abuts against the lower end cover 5; the longitudinal section of the base gasket 25 is a smooth right-angled triangle. The function of the base gasket 25 is to prevent the airbag from being damaged due to friction or extrusion with the lower end cover clamping ring 26 during the working process. The surface of the base gasket 25 in contact with the airbag is an arc surface or a plane and has a certain inclination angle, which can relieve the swinging force and the like received by the airbag, and enable the airbag to move correspondingly on the inclined plane along the direction of the force.

[0044] The protective cylinder 18 can be designed into a partially special-shaped structure according to the movement stroke of the air spring, and the special-shaped structure can be used to adjust the internal clearance of the air spring and the external clearance between the air spring and the peripheral parts of the suspension.

[0045] A spring washer is sleeved on the mounting seat 1 of the solenoid valve. As Figure 3 shown, the spring washer 27 completely wraps the clamping joint between the upper dust cover 19 and the solenoid valve mounting seat 1. The upper end structure of the spring washer 27 matches the body interface. The lower end of the spring washer bends inward to form an inward bulge, and the inward bulge is clamped and matched with the upper dust cover 19, which can play a fixing role in the installation of the spring washer 27. At the same time, the clamping fit can limit the rebound of the wire harness to a certain extent. The upper end edge of the spring washer 27 bends to form a wire harness bulge 33, and the wire harness bulge 33 can be set to match the angle of the vehicle wire harness in the axial direction. Both the body connection and the solenoid valve mounting seat 1 are aluminum parts, and the cylindrical part of the solenoid valve mounting seat 1 has an opening structure. The spring washer 27 can play a waterproof role, and the spring washer 27 is made of elastic material, which can avoid the direct contact between the aluminum body connection and the solenoid valve mounting seat 1, thus avoiding the collision between the body connection and the solenoid valve mounting seat 1.

[0046] The double-chamber structure of the rear air spring provided in Embodiment 1 of the present invention further includes an upper seat clamping ring 28 and a piston 30. Among them, the upper seat clamping ring 28 is a ring structure, and the upper seat clamping ring 28 is sleeved on the outer wall of the bladder 4 and clamps the bladder 4 on the thread of the solenoid valve lower mounting seat 3. The piston 30 is sleeved on the outer wall of the solenoid valve lower mounting seat 3 in an interference fit manner.

[0047] Embodiment 2

[0048] The difference between Embodiment 2 and Embodiment 1 lies in the different airway sealing structures and the addition of a top seat cushion ring compared to Embodiment 1. The other structures of the double-chamber structure of the rear air spring are the same as those in Embodiment 1.

[0049] As Figure 4 shown, the airway sealing structure provided in Embodiment 2 is an axial protrusion 31 formed on the solenoid valve upper mounting seat 1. The axial protrusion 31 extends into the second segmented airway and is in interference fit with the second segmented airway. Through the interference fit between the axial protrusion 9 and the second segmented airway, the sealing of the junction of the first segmented airway and the second segmented airway is achieved.

[0050] The top seat cushion ring 29 is a ring structure. The top seat cushion ring 29 is sleeved on the outer circumference of the upper seat clamping ring 28. The inner wall of the top seat cushion ring 28 has a radial protrusion, and through the radial protrusion, an interference fit is formed between the outer wall of the top seat cushion ring 29 and the outer wall of the upper seat clamping ring 28, forming a structure that is successively the bladder 4, the upper seat clamping ring 28, and the top seat cushion ring 29 from the inside to the outside. The upper surface of the top seat cushion ring 29 abuts against the lower end surface of the piston 30. The slope of the upper end of the outer contour of the top seat cushion ring 29 is the same as the slope of the outer contour of the piston 30. In this way, the outer surface of the piston 30 has an inclination, and the outer surface of the top seat cushion ring 29 also has the same inclination, enabling a smooth transition between the two.

[0051] Specifically, the top seat cushion ring 29 is a plastic part, and the inner wall convex part of the top seat cushion ring 29 is installed in an interference fit with the upper seat clamping ring 28. If the top seat cushion ring 29 is not installed, when the lower end diameter of the piston 30 is more than 8 mm larger than the diameter of the upper seat clamping ring 28, the folding radius of the bladder skin 4 here is too small, resulting in a large frictional force and extrusion force at the contact between the upward movement of the bladder skin 4 and the bottom end of the piston 30, which will reduce the durability of the bladder skin 4; if the top seat cushion ring 29 is installed, when the bladder skin 4 moves upward, it will fit and move along the top seat cushion ring 29. The outer cross-sectional shape of the connection between the top seat cushion ring 29 and the piston 30 is the same, and the lower end of the top seat cushion ring 29 is a smooth rounded corner, which can enable the bladder skin 4 to transition smoothly from the top seat cushion ring 29 to the piston 30, avoiding the generation of the above-mentioned frictional force and extrusion force, and improving the service life of the bladder skin 4.

[0052] Embodiment 3

[0053] The difference between Embodiment 3 and Embodiment 1 lies only in the different structures of the air passage sealing structure, and the other structures of the double-chamber structure of the rear air spring are the same as those in Embodiment 1.

[0054] As Figure 5 shown, the air passage sealing structure provided by Embodiment 3 is a steel ring 32. The steel ring 32 is sleeved into the first segmented air passage and the second segmented air passage from top to bottom in sequence. The steel ring 32 is in an interference fit with both the first segmented air passage and the second segmented air passage. Through the interference fit between the steel ring 32 and the first segmented air passage and the second segmented air passage, the sealing of the junction of the first segmented air passage and the second segmented air passage is realized.

[0055] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0057] The specific embodiments of the present invention described above do not limit the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A rear air spring double-chamber structure, characterized in that It includes an upper mounting seat of the solenoid valve, a lower mounting seat of the solenoid valve, the solenoid valve, a bladder skin and a lower end cover. Both ends of the bladder skin are respectively sealed and clamped on the outer walls of the lower mounting seat of the solenoid valve and the lower end cover. The solenoid valve is installed on the bottom end face of the lower mounting seat of the solenoid valve. The top end of the solenoid valve is hermetically connected to the upper mounting seat of the solenoid valve, and the bottom end of the solenoid valve is hermetically connected to the lower mounting seat of the solenoid valve; The bladder skin, the lower mounting seat of the solenoid valve, the solenoid valve and the lower end cover jointly form a sealed first air chamber. The upper mounting seat of the solenoid valve, the lower mounting seat of the solenoid valve and the solenoid valve jointly form a sealed second air chamber. The solenoid valve controls the connection and disconnection between the second air chamber and the first air chamber; A first segmented air passage is formed on the upper mounting seat of the solenoid valve, and a second segmented air passage is formed on the lower mounting seat of the solenoid valve. The first segmented air passage and the second segmented air passage jointly constitute a complete air passage for inflating the first air chamber. An air passage sealing structure is arranged at the junction of the first segmented air passage and the second segmented air passage.

2. The double-chamber structure of the rear air spring according to claim 1, wherein The air passage sealing structure is an axial protrusion formed on the upper mounting seat of the solenoid valve and extending into the second segmented air passage. Through the interference fit between the axial protrusion and the second segmented air passage, the sealing of the junction of the first segmented air passage and the second segmented air passage is realized.

3. The double-chamber structure of the rear air spring according to claim 1, characterized in that, The air passage sealing structure includes a first air passage sealing ring, a second air passage sealing ring, an upper air passage seat and a lower air passage seat. Among them, the upper air passage seat is threadedly connected to the first segmented air passage. The lower air passage seat is sleeved into the first segmented air passage and the second segmented air passage from top to bottom in sequence. Two circles of sealing grooves are formed on the lower air passage seat. The first air passage sealing ring and the second air passage sealing ring are respectively installed in the two circles of sealing grooves. The first air passage sealing ring forms a sealed connection with the first segmented air passage, and the second air passage sealing ring forms a sealed connection with the second segmented air passage. The sealing of the junction of the first segmented air passage and the second segmented air passage is realized through two sealed connections.

4. The double-chamber structure of the rear air spring according to claim 1, characterized in that, The air passage sealing structure is a steel ring. The steel ring is sleeved into the first segmented air passage and the second segmented air passage from top to bottom in sequence. Through the interference fit between the steel ring and the first segmented air passage and the second segmented air passage, the sealing of the junction of the first segmented air passage and the second segmented air passage is realized.

5. The double-chamber structure of the rear air spring according to any one of claims 1 to 4, characterized in that, A wire harness groove is formed on the top end face of the upper mounting seat of the solenoid valve, and the wire harness groove is provided with a stepped structure for waterproofing.

6. The double-chamber structure of the rear air spring according to any one of claims 1 to 4, characterized in that, It further includes a protective cylinder, an upper dust cover, an upper dust cover gasket and a lower dust cover; among them, The protective cylinder is sleeved on the outer periphery of the bladder skin and is clamped and fixed to the bladder skin; The upper dust cover is sleeved on the outer periphery of the protective cylinder. The upper end of the upper dust cover is fixedly connected to the upper mounting seat of the solenoid valve, and the lower end of the upper dust cover is fixedly connected to the upper dust cover gasket; The upper dust cover gasket is an annular structure composed of two semicircular structures. A gasket groove is formed on the outer wall of the protective cylinder, and the annular structure is inserted into the gasket groove; The lower dust cover is sleeved on the outer periphery of the bladder and the part not protected by the protection cylinder. The lower end of the lower dust cover is fixedly connected to the lower end cover, and the upper end of the lower dust cover is fixedly connected to the protection cylinder.

7. The double-chamber structure of the rear air spring according to claim 6, wherein The protection cylinder is fixedly clamped inside the bladder through a protection cylinder clamping ring; The protection cylinder forms a partial special-shaped structure for adjusting the internal clearance of the rear air spring double-chamber structure and the external clearance between the rear air spring double-chamber structure and the suspension peripheral parts; The upper end of the upper dust cover is clamped and fixed to the solenoid valve upper mounting seat, and the lower end of the upper dust cover is fixedly connected to the upper dust cover gasket through an upper hoop; The lower end of the lower dust cover is clamped and fixed to the lower end cover, and the upper end of the lower dust cover is fixedly connected to the lower end of the protection cylinder through a lower hoop. The lower end of the protection cylinder is bent outward to form a limiting protrusion for limiting the lower hoop; A circle of threads is provided on the lower end cover. One end of the bladder is tightened on the threads of the lower end cover through a lower end cover clamping ring, and a steel ring for enhancing strength is embedded at the threads of the lower end cover; The rear air spring double-chamber structure further includes a base gasket ring. The base gasket ring is sleeved on the outer periphery of the lower end cover clamping ring, and the bottom surface of the base gasket ring abuts against the lower end cover; the longitudinal section of the base gasket ring is a smooth right triangle, and the surface of the base gasket ring in contact with the bladder is an arc surface or a flat surface.

8. The double-chamber structure of the rear air spring according to claim 6, characterized in that, A spring gasket is sleeved on the solenoid valve upper mounting seat. The spring gasket completely wraps the clamping connection between the upper dust cover and the solenoid valve upper mounting seat. The upper end structure of the spring gasket matches the body interface. The lower end of the spring gasket is bent inward to form an inward protrusion, and the inward protrusion is clamped and matched with the upper dust cover; the upper end edge of the spring gasket is bent to form a wire harness protrusion for matching the vehicle wiring harness routing.

9. The double-chamber structure of the rear air spring according to any one of claims 1 to 4, characterized in that, The solenoid valve is axially fixed to the bottom end surface of the solenoid valve lower mounting seat through a solenoid valve stopper and a wire spring clip. The top end of the solenoid valve is hermetically connected to the solenoid valve upper mounting seat through a first sealing ring; the bottom end of the solenoid valve is hermetically connected to the solenoid valve lower mounting seat through a second sealing ring; both the solenoid valve upper mounting seat and the solenoid valve lower mounting seat are aluminum parts. The top end of the solenoid valve lower mounting seat is inserted into and welded to the solenoid valve upper mounting seat to seal the second air chamber.

10. The double-chamber structure of the rear air spring according to claim 1 or 2, characterized in that, It further includes an upper seat clamping ring, a top seat gasket ring and a piston; among them, The upper seat clamping ring is a ring structure and is sleeved on the outer wall of the bladder, clamping the bladder tightly on the threads at the lower end of the solenoid valve lower mounting seat; The piston is sleeved on the outer wall of the solenoid valve lower mounting seat, and the piston is fixedly connected to the solenoid valve lower mounting seat in an interference fit manner; The top seat gasket ring is a ring structure and is sleeved on the outer periphery of the upper seat clamping ring. The top seat gasket ring is provided with a radial protrusion, and the radial protrusion is in interference fit with the outer wall of the upper seat clamping ring; the upper surface of the top seat gasket ring abuts against the lower end surface of the piston, and the slope of the upper end of the outer contour of the top seat gasket ring is the same as that of the outer contour of the piston.

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