Detachable air spring

Abstract

The air spring comprises an upper air chamber, a piston assembly and a leather bag, the upper air chamber comprises an upper shell and a lower shell which are detachably connected, the piston assembly comprises a lower top seat and a piston body, the lower top seat is detachably installed on the piston body, one end of the leather bag is fixedly connected with the lower shell, and the other end of the leather bag is fixedly connected with the piston body. The other end of the leather bag is fixedly connected with the lower top seat; the leather bag is arranged between the upper air chamber and the piston assembly in a sealed mode and partially defines a working cavity filled with compressed air. According to the air spring, the upper air chamber is provided with the detachable upper shell and the lower shell, the piston assembly is provided with the detachable lower top seat and the piston body, the upper portion of the leather bag can be detached from the upper shell, the bottom of the leather bag can be detached from the piston body, meanwhile, loss parts such as a buffer block and top rubber can be detached from the air spring, local replacement is facilitated, and cost is saved.

Description

Technical Field

[0001] This utility model relates to air springs, and more particularly to a detachable air spring. Background Technology

[0002] Air springs provide better support and shock absorption for the vehicle chassis than ordinary coil springs. However, the bladder, as a very important component of an air spring, bears a great deal of function and role. But as a rubber part, the bladder is easily damaged when it is exposed to air for a long time and under constant bending and flexing.

[0003] In existing technologies, air springs, such as Figure 1 As shown, the air spring and piston are fixedly connected. Therefore, if the air spring is damaged, it cannot be disassembled and replaced, and the entire air spring must be replaced, resulting in high costs. To address this, we propose a detachable air spring. Utility Model Content

[0004] The purpose of this invention is to provide a detachable air spring to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: the air spring includes an upper air chamber, a piston assembly, and a bladder; the upper air chamber includes a detachably connected upper shell and a lower shell; the piston assembly includes a lower top seat and a piston body; the lower top seat is detachably mounted on the piston body; one end of the bladder is fixedly connected to the lower shell, and the other end of the bladder is fixedly connected to the lower top seat; wherein, the bladder is sealed between the upper air chamber and the piston assembly and partially defines the working chamber filled with compressed air;

[0006] Preferably, the upper top seat includes a detachably connected upper housing and a lower housing, the lower housing and the upper housing are connected by bolts and a first sealing ring is provided at the junction, wherein the sealing ring is used to seal the top of the working chamber;

[0007] Preferably, the lower top seat is fixed to the upper end of the piston body by a second fastener, the outer periphery of the lower top seat is fixedly connected to the bladder, and a fourth sealing ring is provided at the junction of the bottom of the lower top seat and the piston body;

[0008] Preferably, it also includes a protective sleeve, which is fixed to the outer periphery of the bladder by a support ring disposed inside the bladder;

[0009] Preferably, the upper housing is provided with a slot, and a top adhesive and a top cover are arranged sequentially from bottom to top in the slot. A second sealing ring is provided at the junction of the top cover and the bottom of the slot. A second annular groove is formed at the junction of the top cover and the top of the slot. A retaining spring is provided in the second annular groove for limiting the position of the top cover.

[0010] Preferably, a buffer block is fixedly connected to the bottom end of the lower housing;

[0011] Preferably, it also includes a shock absorber, which is fixedly disposed in the piston body, and the piston rod of the shock absorber passes through a buffer block, an upper housing, and a top rubber in sequence and is fixedly connected to the top rubber.

[0012] Preferably, the working chamber is formed by the cooperation and communication of the lower shell, the bladder, and the piston body. The bottom of the piston body is provided with a third sealing ring and a gasket from top to bottom, which seal the bottom of the working chamber.

[0013] Preferably, it also includes a dust cover, the two ends of which are fixedly connected to the protective sleeve and the bottom spring plate of the shock absorber, respectively;

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By setting the upper air chamber as a detachable upper and lower housing, and the piston assembly as a detachable lower top seat and piston body, the upper part of the bladder can be separated from the upper housing, and the bottom of the bladder can be separated from the piston body. At the same time, consumable parts such as the buffer block and top rubber can be removed from the air spring for partial replacement, saving costs. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the corresponding prior art in this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0018] Figure 3 This is a cross-sectional view of the present invention;

[0019] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0020] Figure 5 for Figure 3 Enlarged view of part B;

[0021] Figure 6 for Figure 3 A magnified view of a portion of the image, C;

[0022] Figure 7 This is a schematic diagram of the structure of the disassembled airbag of this utility model;

[0023] Figure 8 This is a schematic diagram of the disassembled top adhesive of this utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the buffer block after disassembly according to this utility model;

[0025] In the diagram: Top cover 1, upper air chamber 21, upper shell 211, lower shell 212, lower top seat 22, first fastener 23, bladder 3, piston 4, shock absorber 5, protective sleeve 6, dust cover 7, first sealing ring 8, snap ring 9, second sealing ring 10, top rubber 12, third sealing ring 13, washer 14, lower shell clamping ring 17, support ring 16, second fastener 24, fourth sealing ring 25, buffer block 11. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-7 This utility model provides a technical solution: a detachable air spring, the air spring including an upper air chamber 21, a piston 4, and a bladder 3. The upper air chamber 21 includes an upper shell 211 and a lower shell 212. The piston assembly includes a lower top seat 22 and a piston body 4. The lower top seat 22 is detachably mounted on the piston body 4. One end of the bladder 3 is fixedly connected to the upper shell 211, and the other end of the bladder 3 is fixedly connected to the lower top seat 22. The bladder 3 is sealed between the upper air chamber 21 and the piston assembly and partially defines the working chamber filled with compressed air.

[0028] Compared Figure 1 In the existing technology, the two ends of the bladder 3 are fixedly connected to the upper air chamber 21 and the piston body 4 respectively, making it impossible to disassemble the bladder locally. However, in this utility model, when the bladder 3 is damaged, the upper air chamber 21 can be separated into two parts, the upper shell 211 and the lower shell 212, to detach the upper shell 211 from the bladder 3. The piston body 4 in the piston assembly can be separated from the lower top seat 22 to detach the piston body 4 from the bladder 3. This makes it easier to remove vulnerable parts such as the bladder 3 from the air spring for local replacement and cost savings.

[0029] In a further embodiment, the upper air chamber 21 includes an upper shell 211 and a lower shell 212, which are engaged and connected by a plurality of first fasteners 23, which are bolts; a first sealing ring 8 is provided at the engagement point, and the lower end of the lower shell 212 is fixedly connected to the bladder 3.

[0030] By splitting the upper air chamber 21 into two parts, it is possible to easily separate the bladder 3 from the upper housing 211 when the bladder 3 is damaged, thereby reducing the need for replacement of parts. At the same time, the first sealing ring ensures the airtightness of the connection between the upper housing 211 and the lower housing 212, thereby further ensuring the sealing of the top of the working chamber.

[0031] In a further embodiment, the lower end of the lower housing 212 is inserted into the bladder 3, and the insertion point is provided with a serrated mating part, and the outer side of the bladder 3 is provided with an upper top seat buckling ring.

[0032] The lower housing 212 and the bladder are both provided with serrated parts that cooperate with each other for positioning, which further ensures the stability of the clamping and the sealing effect; at the same time, the lower housing clamping ring 17 further ensures the locking of the lower housing 212 and the bladder.

[0033] In a further embodiment, the lower top seat 22 is fixed to the upper end of the piston body 4 by a plurality of second fasteners 24, the second fasteners being bolts; the outer periphery of the lower top seat 22 is sleeved and connected to the bladder 3, and a fourth sealing ring is provided at the junction of the bottom of the lower top seat 22 and the piston body 4.

[0034] When the airbag needs to be replaced, the second fastener 24 can be removed to separate the airbag 3 from the piston body 4, making it easier to replace the airbag 3.

[0035] In a further embodiment, the bottom of the bladder 3 is sleeved on the outer peripheral surface of the lower top seat 22, and the sleeved part is a serrated mating part. The outer side of the bladder 3 is provided with a lower top seat buckling ring. The serrated parts that cooperate and position each other are provided on the outer peripheral surface of the lower top seat 22 and the insertion part of the bladder, which further ensures the connection stability.

[0036] In a further embodiment, a protective sleeve 6 is also included, which is fixed to the outer periphery of the skin 3 by a support ring 16 disposed inside the skin 3; that is, the protective sleeve on the outside of the skin 3 is limited and fixed by the support ring 16 disposed inside the skin 3.

[0037] In a further embodiment, a slot is provided on the upper housing 211, and a top adhesive 12 and a top cover 1 are arranged sequentially from bottom to top in the slot. A first annular groove is provided on the bottom of the outer periphery of the top cover 1, and a second sealing ring 10 is provided in the first annular groove. The junction of the outer periphery of the top cover and the top of the inner wall of the slot forms a second annular groove. A retaining spring 9 is provided in the second annular groove, wherein the retaining spring 9 limits the top cover in the slot.

[0038] That is, the second sealing ring 10 ensures the airtightness of the connection between the top cover 1 and the upper air chamber 21, and further ensures the sealing of the working chamber.

[0039] By incorporating a top mount 12, the impact from the piston rod is absorbed when the vehicle body vibrates, thereby reducing direct impact on the car and improving ride comfort. Simultaneously, since the top mount is used to absorb vehicle vibrations and is a consumable part, it can be replaced by pressing the top cover 1 to compress the top mount 12. The elasticity of the top mount 12 causes it to contract, resulting in the top cover 1 moving downwards. This allows the retaining spring 9 to be removed from the second annular groove, and further, the top cover to be removed from the groove. In other words, the retaining spring not only limits the position of the top cover 1 but also facilitates its removal from the upper housing, making it convenient for replacing the top mount assembly (e.g., ...). Figure 8 (This refers to the replaced top mount assembly).

[0040] In a further embodiment, a buffer block 11 is snapped onto the lower end of the lower housing 212;

[0041] The buffer block 11 is used to limit the suspension travel in order to absorb the impact load transmitted from the wheels to the vehicle body; at the same time, as a consumable part, the buffer block 11 can be replaced by removing the upper air chamber when it is worn out.

[0042] In a further embodiment, a shock absorber 5 is also included. The shock absorber 5 is fixedly disposed inside the piston body 4. The piston rod of the shock absorber 5 passes through the buffer block 11, the upper housing 211, and the top rubber 12 in sequence and is fixedly connected to the top rubber 12.

[0043] By connecting the shock absorber to the buffer block 11 and the top rubber 12 in sequence, the NVH performance of the whole vehicle can be better improved when the vehicle body vibrates.

[0044] In a further embodiment, a dust cover 7 is also included, with its two ends fixedly connected to the protective sleeve 6 and the shock absorber 5, respectively. By covering the outside of the air spring with a dust cover, mud and sand can be prevented from entering the interior of the air spring and causing wear to the air spring's bladder 3.

[0045] In a further embodiment, the working chamber is formed by the lower housing 212, the bladder 3, and the piston body 4 connected together. The shock absorber 5 is fitted with a washer 14 and a third sealing ring 13 from bottom to top, and the bottom of the working chamber is sealed by the third sealing ring 13 and the washer 14.

[0046] That is, the sealing of the working chamber is ensured by providing a washer 14 and a third sealing ring 13 at the bottom of the piston body 4; at the same time, when the vehicle body vibrates, the compressed air in the working chamber squeezes the washer 14 and the third sealing ring 13, causing them to deform, which further improves the sealing of the piston body 4.

[0047] In a further embodiment, a spring disc is welded to the bottom of the shock absorber (5), the top of the spring disc abuts against the washer 14, the dust cover 7 is corrugated, and the spring disc engages with the inner wall of a section of the corrugated tube in the dust cover 7; this further ensures the sealing performance and improves the connection stability of the dust cover 7.

[0048] The working principle of this utility model is as follows: When the bladder 3 is damaged, by disassembling the first fastener 23 at the top of the bladder 3 and the second fastener at the bottom of the bladder 3, the top of the bladder 3 is separated from the upper shell 211, and the bottom of the bladder 3 is separated from the piston body 4. The remaining parts can then be removed, allowing only the attached components to be removed. Figure 4 The air spring assembly can be removed and replaced. At the same time, consumable parts such as buffer block 11 and top rubber 12 can also be replaced to avoid the situation where consumable parts such as air spring 3, buffer block 11, and top rubber 12 cannot be partially disassembled and can only be replaced by replacing the entire air spring when they are damaged.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable air spring, characterized in that, The air spring includes an upper air chamber (21), a piston assembly, and a bladder (3). The upper air chamber (21) includes a detachably connected upper housing (211) and a lower housing (212). The piston assembly includes a lower top seat (22) and a piston body (4). The lower top seat (22) is detachably mounted on the piston body (4). One end of the bladder (3) is fixedly connected to the lower housing (212), and the other end of the bladder (3) is fixedly connected to the lower top seat (22). The bladder (3) is sealed between the upper air chamber (21) and the piston assembly and partially defines the working chamber filled with compressed air.

2. The detachable air spring according to claim 1, characterized in that: The upper housing (211) and the lower housing (212) are connected by bolts and a first sealing ring (8) is provided at the junction, wherein the sealing ring (8) is used to seal the top of the working chamber.

3. A detachable air spring according to claim 1, characterized in that: The lower top seat (22) is fixed to the upper end of the piston body (4) by the second fastener (24). The outer periphery of the lower top seat (22) is fixedly connected to the bladder (3). A fourth sealing ring (25) is provided at the junction of the bottom of the lower top seat (22) and the piston body (4).

4. A detachable air spring according to claim 1, characterized in that: It also includes a protective sleeve (6), which is fixed to the outer periphery of the sac (3) by a support ring (16) disposed inside the sac (3).

5. A detachable air spring according to claim 1, characterized in that: The upper housing (211) has a slot, and a top adhesive (12) and a top cover (1) are arranged in the slot from bottom to top. A second sealing ring (10) is provided at the junction of the top cover (1) and the bottom of the slot. The top cover (1) and the top of the slot are fitted together to form a second annular groove. A retaining spring (9) for limiting the top cover (1) is provided in the second annular groove.

6. A detachable air spring according to claim 5, characterized in that: A buffer block (11) is fixedly connected to the bottom end of the lower housing (212).

7. A detachable air spring according to claim 6, characterized in that: It also includes a shock absorber (5), which is fixedly installed inside the piston body (4). The piston rod of the shock absorber (5) passes through the buffer block (11), the upper shell (211), and the top rubber (12) in sequence and is fixedly connected to the top rubber (12).

8. A detachable air spring according to claim 1, characterized in that: The working chamber is formed by the lower shell (212), the bladder (3), and the piston body (4) in a coordinated manner. The bottom of the piston body (4) is provided with a third sealing ring (13) and a gasket (14) from top to bottom, which seal the bottom of the working chamber.

9. A detachable air spring according to claim 1, characterized in that: It also includes a dust cover (7), the two ends of which are fixedly connected to the protective sleeve (6) and the bottom spring plate of the shock absorber (5), respectively.

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