Split type air spring double-cavity structure

Abstract

According to the split type air spring double-cavity structure, an upper cavity structure of the split type air spring double-cavity structure comprises an upper air chamber upper cover and an upper air chamber lower cover, the upper air chamber lower cover is provided with a lower cavity air channel, and the lower cavity air channel directly penetrates out of the upper air chamber upper cover, so that a sealing ring is prevented from being used between the upper air chamber upper cover and the lower air chamber lower cover; the failure caused by factors such as aging of the sealing ring and expansion caused by heat and contraction caused by cold is also avoided; the electromagnetic valve structure comprises an electromagnetic valve, an electromagnetic valve check block and a dustproof ring, the dustproof ring is arranged on the upper end face of the electromagnetic valve, and the side face of the dustproof ring is matched with the side wall of the upper air chamber upper cover. The dustproof ring can deform accordingly, the side face of the dustproof ring is attached to the side wall of the upper air chamber upper cover all the time, and therefore sealing failure caused by the fact that muddy water enters the upper chamber structure in the using process is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a split air spring double-cavity structure. Background Art

[0002] The stiffness of an air spring is related to its internal volume. The larger the internal volume, the smaller the stiffness. Different road conditions have different requirements for the stiffness of air springs, so dual-chamber air springs have emerged, which can adapt to different driving conditions by switching between single and double chamber volumes.

[0003] A Chinese utility model patent discloses a double-chamber structure of a rear air spring (CN218063189U), the main structure of which includes: the upper and lower covers of the upper air chamber are connected by upper and lower sealing rings to achieve sealing at the junction, or the sealing at the junction is achieved by interference fit between the steel ring and the upper and lower mounting seats; the solenoid valve is axially fixed on the bottom end face of the lower mounting seat of the solenoid valve through the solenoid valve block and the retaining spring.

[0004] Sealing is an important characteristic that affects air springs. In the above scheme, the upper and lower sealing rings or steel rings have potential failure risks due to aging, thermal expansion and contraction, dimensional error, deformation, burrs, etc., which will cause the air spring to leak after failure; during the use of the air spring, due to vibration and the volume change of the air spring itself, muddy water will enter the upper sealing groove of the solenoid valve through the gap between the solenoid valve block and the upper mounting seat. After the muddy water enters the sealing groove, it will cause the seal to fail, resulting in the failure of the air spring. Therefore, the two structures between the upper and lower covers of the upper air chamber and between the solenoid valve block and the upper mounting seat correspond to the main chamber and the sub-chamber in the entire air spring. If the seal fails at any one of them, the entire double-chamber air spring will fail. How to control the sealing of these two structures is a problem that technicians are committed to solving. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a split air spring double-chamber structure with good structural sealing performance at two locations, between the upper and lower covers of the upper air chamber and between the electromagnetic valve stopper and the upper mounting seat.

[0006] The technical solution adopted by the utility model to solve the above problems is: a split air spring double-chamber structure, comprising:

[0007] The chamber structure is as follows:

[0008] an upper chamber structure, wherein the upper chamber structure comprises an upper air chamber upper cover and an upper air chamber lower cover; the upper air chamber lower cover has a lower chamber air path; the lower end of the lower chamber air path is arranged to communicate with the lower chamber structure, and the upper end is arranged to pass through the upper air chamber upper cover and communicate with the outside; and

[0009] A solenoid valve structure, wherein the solenoid valve structure is arranged between the lower chamber structure and the upper chamber structure so as to control the internal volume of the lower chamber structure and the upper chamber structure; the solenoid valve structure comprises a solenoid valve, a solenoid valve block and a dust ring; the solenoid valve is fixed to the upper air chamber cover through the solenoid valve block; the dust ring is arranged on the upper end surface of the solenoid valve, and the side surface of the dust ring is arranged to cooperate with the side wall of the upper air chamber cover to prevent mud and water from entering the upper chamber structure.

[0010] Compared with the prior art, the upper chamber structure of the utility model includes an upper air chamber upper cover and an upper air chamber lower cover, the upper air chamber lower cover has a lower chamber air path, and the lower chamber air path directly passes through the upper air chamber upper cover, thereby avoiding the use of a sealing ring between the upper and lower covers of the upper air chamber, and also avoiding failure caused by factors such as aging of the sealing ring, thermal expansion and contraction; the solenoid valve structure includes a solenoid valve, a solenoid valve block and a dust ring, the dust ring is arranged on the upper end face of the solenoid valve, and the side of the dust ring is matched with the side wall of the upper air chamber cover. When the air spring vibrates and changes in volume during use, the dust ring can be deformed accordingly and the side of the dust ring is always in contact with the side wall of the upper air chamber cover, thereby preventing mud and water from entering the upper chamber structure during use, causing sealing failure.

[0011] The utility model discloses a split air spring double-chamber structure, wherein the upper air chamber upper cover has an air path through hole; the lower chamber air path is arranged to pass through the air path through hole; the air path through hole includes a sealing portion arranged at at least one end; the sealing portion is used to fill the gap between the air path through hole and the lower chamber air path.

[0012] The utility model discloses a split air spring double-chamber structure, wherein the upper air chamber upper cover and the upper air chamber lower cover are set to be metal materials; the sealing part is produced by welding the upper air chamber upper cover and the upper air chamber lower cover.

[0013] The utility model discloses a split air spring double-chamber structure, wherein the upper air chamber upper cover comprises a conical portion; the dust ring is arranged to be fixed on the conical portion; the side surface of the dust ring is a conical surface and is interference fit with the side surface of the conical portion.

[0014] The utility model discloses a split air spring double-chamber structure, wherein the dust ring includes a first tension layer and a second tension layer; the force between the first tension layer and the conical portion is set to be smaller than the force between the second tension layer and the conical portion, so that when the conical portion vibrates or deforms, the first tension layer deforms before the second tension layer.

[0015] The utility model provides a split air spring double-chamber structure, wherein the solenoid valve structure further comprises at least one sealing ring; the sealing ring is arranged between the conical portion and the side wall of the solenoid valve.

[0016] The utility model provides a split air spring double-chamber structure, wherein the upper chamber structure further comprises:

[0017] a piston sleeve, wherein the piston sleeve is arranged outside the lower cover of the upper air chamber;

[0018] an upper dust cover, wherein the upper dust cover is arranged outside the piston sleeve;

[0019] a dust cover gasket, wherein the dust cover gasket is disposed at a lower end of the upper dust cover; and

[0020] An upper clamp, wherein the upper clamp is arranged at the lower end of the upper dust cover so as to connect the upper dust cover with a dust cover gasket.

[0021] The utility model discloses a split air spring double-chamber structure, wherein the lower chamber structure comprises:

[0022] a bag of skin;

[0023] An upper air chamber buckling ring, wherein the upper air chamber buckling ring is used to fix the bladder skin to the lower end of the upper air chamber lower cover;

[0024] a casing, wherein the casing is disposed outside the bladder skin;

[0025] a lower seat; the lower end of the bag skin is arranged on the lower seat;

[0026] A bladder skin stacking ring; the lower end of the bladder skin is fixed to the lower seat through the bladder skin stacking ring;

[0027] a lower dust cover, wherein the lower dust cover is disposed outside the lower end of the bag skin, and the lower end of the lower dust cover is fixedly connected to the lower seat; and

[0028] A lower clamp; the lower clamp is used to fix the upper end of the lower dust cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0030] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0031] Figure 3 It is a partial enlarged schematic diagram of the gas path of the lower chamber;

[0032] Figure 4It is a three-dimensional schematic diagram of the dust ring;

[0033] Figure 5 It is a cross-sectional schematic diagram of the dust ring;

[0034] Figure 6 It is a cross-sectional schematic diagram of the solenoid valve structure. DETAILED DESCRIPTION

[0035] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited in its application to the construction and arrangement details of the components described below or illustrated in the following figures. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0036] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0037] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

[0038] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0039] See also Figure 1-6The split air spring double chamber structure shown in the figure includes a lower chamber structure 1, an upper chamber structure 2 and a solenoid valve structure 3; wherein the upper chamber structure 2 includes an upper air chamber upper cover 21 and an upper air chamber lower cover 22; the upper air chamber lower cover 22 has a lower chamber air path 221; the lower end of the lower chamber air path 221 is arranged to communicate with the lower chamber structure 1, and the upper end is arranged to pass through the upper air chamber upper cover 21 and communicate with the outside; wherein the solenoid valve structure 3 is arranged in the lower chamber Structure 1 and the upper chamber structure 2 so as to control the content volume of the lower chamber structure 1 and the upper chamber structure 2; the solenoid valve structure 3 includes a solenoid valve 31, a solenoid valve block 32 and a dust ring 33; the solenoid valve 31 is fixed to the upper air chamber cover 21 through the solenoid valve block 32; the dust ring 33 is arranged on the upper end surface of the solenoid valve 31, and the side surface of the dust ring 33 is arranged to cooperate with the side wall of the upper air chamber cover 21 to prevent mud and water from entering the upper chamber structure 2.

[0040] In actual use, the upper chamber structure 2 of the utility model includes an upper air chamber upper cover 21 and an upper air chamber lower cover 22. The upper air chamber lower cover 22 has a lower chamber air path 221, and the lower chamber air path 221 directly passes through the upper air chamber upper cover 21, thereby avoiding the use of a sealing ring between the upper and lower covers of the upper air chamber, and also avoiding failure caused by factors such as aging of the sealing ring, thermal expansion and contraction; the solenoid valve structure 3 includes a solenoid valve 31, a solenoid valve block 32 and a dust ring 33. The dust ring 33 is arranged on the upper end face of the solenoid valve 31, and the side of the dust ring 33 cooperates with the side wall of the upper air chamber cover 21. When the air spring vibrates and changes in volume during use, the dust ring 33 can be deformed accordingly and the side of the dust ring 33 is always in contact with the side wall of the upper air chamber cover 21, thereby preventing mud and water from entering the upper chamber structure 2 during use, causing sealing failure.

[0041] Please continue reading Figure 2 , Figure 3 , wherein the upper air chamber cover 21 has an air path through hole 211; the lower chamber air path 221 is configured to pass through the air path through hole 211; the air path through hole 211 includes a sealing portion 2111 arranged at at least one end; the sealing portion 2111 is used to fill the gap between the air path through hole 211 and the lower chamber air path 221.

[0042] Specifically, the sealing between the upper and lower covers of the upper air chamber in the prior art relies on two upper and lower sealing rings, which will cause air leakage when the sealing rings fail. However, the lower chamber air path 221 of the utility model is configured to pass through the air path through hole 211, omitting the sealing ring used in the prior art, thereby avoiding the risk of failure caused by aging of the sealing ring, thermal expansion and contraction, dimensional error, deformation, burrs, etc.; instead, the utility model adopts a sealing portion 2111 and is arranged at at least one end of the air path through hole 211, thereby ensuring sealing.

[0043] Please read further Figure 2 , Figure 3 In some embodiments, the upper air chamber upper cover 21 and the upper air chamber lower cover 22 are set to be made of metal material; the sealing part 2111 is produced by welding the upper air chamber upper cover 21 and the upper air chamber lower cover 22.

[0044] Furthermore, the sealing part 2111 is arranged at the upper and lower ends of the air path through hole 211. Since the sealing part 2111 is welded by metal instead of an independently installed component, it can avoid problems such as thermal expansion and contraction, dimensional error, deformation, burrs, etc., thereby improving the sealing degree; in addition, the sealing part 2111 welded by metal also helps to improve the structural strength.

[0045] Please continue reading Figure 4-6 , wherein the upper air chamber cover 21 includes a conical portion 212 ; the dust ring 33 is configured to be fixed to the conical portion 212 ; the side surface of the dust ring 33 is a conical surface, and is interference fit with the side surface of the conical portion 212 .

[0046] It is worth mentioning that the dust ring 33 is made of a deformable elastic material. The interference fit between the dust ring 33 and the upper air chamber cover 21 allows the side of the dust ring 33 and the side of the conical portion 212 to always remain in contact under vibration conditions. The setting of the conical surfaces of the two is conducive to the installation of the dust ring 33 and their mutual fixation.

[0047] Please continue reading Figure 4 , Figure 5 The dust ring 33 includes a first tension layer 331 and a second tension layer 332; the force between the first tension layer 331 and the conical portion 212 is set to be smaller than the force between the second tension layer 332 and the conical portion 212, so that when the conical portion 212 vibrates or deforms, the first tension layer 331 deforms before the second tension layer 332.

[0048] Specifically, the dual-chamber air spring is used in the chassis of a car. During the driving of the car, the car itself will vibrate, which will also cause the dual-chamber air spring to contract, thereby driving the upper air chamber cover 21 to vibrate and deform; when the upper air chamber cover 21 vibrates and deforms, the first tension layer 331 will deform before the second tension layer 332, so as to absorb the vibration and deformation generated by the upper air chamber cover 21 through deformation, and ensure that the second tension layer 332 always remains in contact with the upper air chamber cover 21, thereby preventing mud and water from seeping in from between the solenoid valve block and the upper mounting seat.

[0049] Please continue reading Figure 6, wherein the solenoid valve structure 3 further includes at least one sealing ring 34; the sealing ring 34 is arranged between the conical portion 212 and the side wall of the solenoid valve 31. By setting at least one sealing ring 34, the sealing performance between the solenoid valve block and the upper mounting seat can be improved, further playing a role in preventing mud and water from seeping in.

[0050] Please read further Figure 1 , Figure 2 , wherein the upper chamber structure 2 further includes a piston sleeve 23, an upper dust cover 24, a dust cover gasket 25 and an upper clamp 26; wherein the piston sleeve 23 is arranged outside the upper air chamber lower cover 22; wherein the upper dust cover 24 is arranged outside the piston sleeve 23; wherein the dust cover gasket 25 is arranged at the lower end of the upper dust cover 24; wherein the upper clamp 26 is arranged at the lower end of the upper dust cover 24 so as to connect the upper dust cover 24 and the dust cover gasket 25.

[0051] Please read further Figure 1 , Figure 2 , wherein the lower chamber structure 1 includes a bladder skin 11, an upper air chamber pressing ring 12, a protective tube 13, a lower seat 14, a bladder skin stacking ring 15, a lower dust cover 16 and a lower clamp 17; wherein the upper air chamber pressing ring 12 is used to fix the bladder skin 11 to the lower end of the upper air chamber lower cover 22; wherein the protective tube 13 is arranged outside the bladder skin 11; the lower end of the bladder skin 11 is arranged on the lower seat 14; the lower end of the bladder skin 11 is fixed to the lower seat 14 through the bladder skin stacking ring 15; wherein the lower dust cover 16 is arranged outside the lower end of the bladder skin 11, and the lower end of the lower dust cover 16 is fixedly connected to the lower seat 14; the lower clamp 17 is used to fix the upper end of the lower dust cover 16.

[0052] The above description is only for the best embodiment of the utility model, but it cannot be understood as a limitation of the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.

Claims

1. A split air spring double chamber structure, characterized in that: include: A chamber structure (1); an upper chamber structure (2), wherein the upper chamber structure (2) comprises an upper air chamber upper cover (21) and an upper air chamber lower cover (22); the upper air chamber lower cover (22) has a lower chamber air path (221); the lower end of the lower chamber air path (221) is arranged to communicate with the lower chamber structure (1), and the upper end is arranged to pass through the upper air chamber upper cover (21) and communicate with the outside; and A solenoid valve structure (3), wherein the solenoid valve structure (3) is arranged between the lower chamber structure (1) and the upper chamber structure (2) so as to control the internal volume of the lower chamber structure (1) and the upper chamber structure (2); the solenoid valve structure (3) comprises a solenoid valve (31), a solenoid valve stopper (32) and a dust ring (33); the solenoid valve (31) is fixed to the upper air chamber cover (21) through the solenoid valve stopper (32); the dust ring (33) is arranged on the upper end surface of the solenoid valve (31), and the side surface of the dust ring (33) is arranged to cooperate with the side wall of the upper air chamber cover (21) so as to prevent muddy water from entering the upper chamber structure (2).

2. The split air spring dual-chamber structure according to claim 1 is characterized in that: The upper air chamber cover (21) has an air path through hole (211); the lower chamber air path (221) is arranged to pass through the air path through hole (211); the air path through hole (211) comprises a sealing portion (2111) arranged at at least one end; the sealing portion (2111) is used to fill the gap between the air path through hole (211) and the lower chamber air path (221).

3. The split air spring dual-chamber structure according to claim 2 is characterized in that: The upper air chamber upper cover (21) and the upper air chamber lower cover (22) are configured to be made of metal material; the sealing portion (2111) is produced by welding the upper air chamber upper cover (21) and the upper air chamber lower cover (22).

4. The split air spring dual-chamber structure according to claim 1 is characterized in that: The upper air chamber cover (21) comprises a conical portion (212); the dust ring (33) is arranged to be fixed on the conical portion (212); the side surface of the dust ring (33) is a conical surface and is interference fit with the side surface of the conical portion (212).

5. The split air spring dual-chamber structure according to claim 4 is characterized in that: The dustproof ring (33) includes a first tension layer (331) and a second tension layer (332); the force between the first tension layer (331) and the conical portion (212) is set to be smaller than the force between the second tension layer (332) and the conical portion (212), so that when the conical portion (212) vibrates or deforms, the first tension layer (331) is deformed before the second tension layer (332).

6. The split air spring dual-chamber structure according to claim 5 is characterized in that: The solenoid valve structure (3) further comprises at least one sealing ring (34); the sealing ring (34) is arranged between the conical portion (212) and the side wall of the solenoid valve (31).

7. The split air spring dual-chamber structure according to claim 1 is characterized in that: The upper chamber structure (2) further comprises: a piston sleeve (23), wherein the piston sleeve (23) is arranged outside the upper air chamber lower cover (22); an upper dust cover (24), wherein the upper dust cover (24) is arranged outside the piston sleeve (23); a dust cover gasket (25), wherein the dust cover gasket (25) is disposed at the lower end of the upper dust cover (24); and An upper clamp (26), wherein the upper clamp (26) is arranged at the lower end of the upper dust cover (24) so ​​as to connect the upper dust cover (24) with a dust cover gasket (25).

8. The split air spring dual-chamber structure according to claim 1 is characterized in that: The lower chamber structure (1) comprises: a sac of skin (11); an upper air chamber buckling ring (12), wherein the upper air chamber buckling ring (12) is used to fix the bladder skin (11) to the lower end of the upper air chamber lower cover (22); a protective sleeve (13), wherein the protective sleeve (13) is arranged outside the bladder skin (11); a lower seat (14); the lower end of the bag skin (11) is arranged on the lower seat (14); a bladder skin stacking ring (15); the lower end of the bladder skin (11) is fixed to the lower seat (14) through the bladder skin stacking ring (15); a lower dust cover (16), wherein the lower dust cover (16) is arranged outside the lower end of the bag skin (11), and the lower end of the lower dust cover (16) is fixedly connected to the lower seat (14); and A lower clamp (17); the lower clamp (17) is used to fix the upper end of the lower dust cover (16).

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