Air spring damper and vehicle

Abstract

The application relates to the technical field of shock absorbers, and discloses an air spring shock absorber and a vehicle, wherein the air spring shock absorber comprises a shock absorber body and an air spring assembly; the air spring assembly comprises a top base, a rubber capsule, a mounting block, a bottom base, a protective shell, a dust cover and a sheath; the mounting block is mounted on the shock absorber body; the bottom base is connected with the mounting block; the rubber capsule is connected with the bottom base and the top base; the sheath is sleeved on the bottom base; the sheath is in interference fit with the bottom base, so that an elastic fit surface is formed; and a plurality of hollow areas are arranged on the sheath. Through the arrangement of the sheath, the bottom base can reach the designed strength without thick and heavy materials, and the weight is reduced; the bottom base can bear the strength of the bottom base and can also buffer and absorb the vibration and impact force from the bottom base; the fit surface of the sheath and the bottom base is designed as a hollow reinforcing rib structure, so that the sheath has good strength and the shock absorption effect is better than that of a solid body; and the weight is reduced, and the overall failure caused by local damage is avoided.

Description

Technical Field

[0001] This invention relates to the field of shock absorber technology, specifically to an air spring shock absorber and a vehicle. Background Technology

[0002] The base for assembling the non-independent air spring (which replaces the external buffer spring and works with the telescopic shock absorber) with the outer cylinder of the shock absorber generally falls into two categories, such as... Figure 3 , 4 One type is made of thin-walled aluminum tube. This type of base has poor shock absorption. Also, because it is multi-diameter, thickening the tube wall would cause processing difficulties, high costs, and heavy weight. Therefore, it is almost always thin-walled and has weak strength. The other type is made of plastic. This type of base is heavy. Due to the material, its strength and durability are not ideal.

[0003] In addition, the airbag base is generally too short, and its own spring cushioning and shock absorption performance is not high. Most of the vibration received is transmitted to its mating parts, especially the mounting block, sealing ring, limit spring, etc. directly connected to it, which can easily cause air spring gas leakage.

[0004] O-rings are almost always used for sealing rubber rings, and the reliability of single-line sealing is not very good. This application is proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an air spring damper, which proposes a structure for assembling a non-independent air spring with the damper outer cylinder, and can meet the design strength without the need for a base made of heavy materials.

[0006] The present invention is achieved through the following technical solution.

[0007] An air spring vibration damper of the present invention includes a damper body and an air spring assembly. The air spring assembly includes a top seat, a rubber bladder, a mounting block, a base, a protective shell, a dust cover, and a protective sleeve. The mounting block is mounted on the damper body, the base is connected to the mounting block, the rubber bladder is connected to the base and the top seat, and the protective sleeve is fitted onto the base. The protective sleeve and the base are interference-fitted to form an elastic mating surface, and the protective sleeve is provided with a plurality of hollow areas.

[0008] Furthermore, the diameter of the sheath gradually decreases from one end near the top seat to the other end.

[0009] Furthermore, several of the hollowed-out areas are arranged on the axial inner wall of the sheath.

[0010] Furthermore, the depth of the hollowed-out area at different locations is proportional to the diameter of the sheath.

[0011] Furthermore, the hollowed-out area has an annular groove structure.

[0012] Furthermore, the base is provided with a sleeve mounting groove, and the sleeve is disposed in the sleeve mounting groove.

[0013] Furthermore, a first sealing ring is provided between the base and the mounting block, and a second sealing ring is provided between the mounting block and the shock absorber body.

[0014] Furthermore, the first sealing ring is a star-shaped sealing ring, and the first sealing ring forms at least two sealing surfaces with the base and the mounting block respectively.

[0015] Furthermore, one end of the base is connected to the mounting block, and the other end extends to a position flush with or beyond the piston extension end of the shock absorber body, with a gap between the inner wall of the base and the shock absorber body.

[0016] A vehicle equipped with the aforementioned air spring shock absorber.

[0017] The beneficial effects of this invention are:

[0018] With the addition of a protective sleeve, the base can achieve the designed strength without the need for heavy materials, resulting in a lighter weight. The sleeve and base have a smooth, elastic fit, which not only strengthens the base but also cushions and absorbs vibrations and impacts from it. The mating surfaces of the sleeve and base are designed with a hollowed-out reinforcing rib structure, providing excellent strength and shock absorption compared to solid materials. Furthermore, the weight reduction prevents overall failure due to surface damage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 A schematic diagram of an air spring vibration damper;

[0022] Figure 2 This is a schematic diagram of the first sealing ring structure;

[0023] Figure 3 This is a schematic diagram of an air spring vibration damper with a thin-walled aluminum tube base in the prior art;

[0024] Figure 4 This is a schematic diagram of an air spring vibration damper with a plastic base in the prior art. Detailed Implementation

[0025] The following is combined Figure 1-2 The present invention will be described in detail below.

[0026] An air spring damper of the present invention, such as Figure 1 The system includes a shock absorber and an air spring assembly. The shock absorber can be a single-tube or twin-tube type. The air spring assembly is mounted on the shock absorber body 201 (shock absorber housing). The air spring assembly includes a top seat 101, a rubber bladder 102, a mounting block 106, a base 110, a protective sleeve 104, a protective shell 103, and a dust cover 105. The mounting block 106 is mounted on the shock absorber body 201 and is generally annular. The cylindrical base 110 is connected to the mounting block 106. In this design, the base 110 is an elongated base, with one end connected to the mounting block 106. The other end extends to the piston rod 202 protruding end of the shock absorber body 201 (right end in the figure), which can be flush with or slightly longer than one end of the shock absorber body 201. The extended base can further improve the cushioning performance of the base. At the same time, since the extended part is located inside the original dust cover, it does not affect vehicle installation. The extended base is not a solid part and has internal space. The extra space after the extension is located in the air spring's air storage chamber, which increases the air spring's air storage chamber. The air spring's cushioning and shock absorption capabilities are greatly improved, the product life is longer, and the ride comfort is further improved.

[0027] A first sealing ring 107 is provided between the base 110 and the mounting block 106, and a second sealing ring 109 is provided between the mounting block 106 and the shock absorber body 201. The second sealing ring 109 is an O-ring rubber seal, and the first sealing ring 107 is a star-shaped seal. Figure 2 The first sealing ring 107 forms at least two sealing surfaces with the base 110 and the mounting block 106 respectively. Compared with the traditional O-ring, it changes from a single-line seal to a double-line seal, which greatly improves the sealing performance. Moreover, because it is a double-line compression seal, its buffering performance is stronger and it will not fail even if the single line is damaged, resulting in a longer product life.

[0028] The rubber bladder 102 is connected to the base 110 and the top seat 101, the piston rod 202 is connected to the top seat 101, the protective shell 103 is connected to the dust cover 105, the dust cover 105 is installed on the base 110, the protective shell 103 is connected to the rubber bladder 102, and the sheath 104 is fitted onto the base 110. The sheath 104 and the base 110 are interference-fitted to form an elastic mating surface 108, and the sheath 104 is provided with several hollow areas 111. In this embodiment, both the sheath 104 and the base 110 can be made of plastic, wherein the material of the sheath 104 is preferably PA66 (polyhexamethylene adipamide, commonly known as nylon-66), with a certain amount of glass fiber added (generally 20-30%).

[0029] like Figure 1 The diameter of the sheath 104 gradually decreases from one end near the top seat 101 to the other end. The wall thickness of the sheath 104 increases with the increase of the diameter of the sheath 104. Several hollow areas 111 are arranged on the axial inner wall of the sheath 104. In this embodiment, the hollow areas 111 are shaped as annular grooves on the inner wall of the sheath 104, forming a reinforcing rib structure 112 between adjacent hollow areas 111. The shape of the hollow areas can also be adjusted according to different performance requirements. The depth of the hollow areas 111 at different positions is proportional to the diameter of the sheath 104, such as... Figure 1 The depth of the hollowed-out area 111 gradually increases from left to right, thus forming energy-absorbing areas with different properties, which have the effect of efficiently absorbing vibration.

[0030] Optionally, both ends of the sheath 104 are in a free state and do not interfere with other structures, thus ensuring vibration absorption performance.

[0031] When the base is impacted, it will expand and vibrate. Since the sleeve and the base are tightly fitted, the vibration is naturally absorbed. Because the base is an elastic material, it quickly recovers after expansion, then expands again, and recovers again... Because the sleeve and the base are elastically tightly fitted, they will produce non-vibrational vibration phenomena with the base. In the process of continuous contact and separation with the base, it absorbs vibration and buffers the force from the base.

[0032] Therefore, by using a protective sleeve, the base can achieve the designed strength without the need for heavy materials, thus reducing weight. The sleeve and base have a smooth, elastic fit, which not only strengthens the base but also cushions and absorbs vibrations and impacts from it. The mating surfaces of the sleeve and base are designed with a hollow reinforcing rib structure, which provides excellent strength and shock absorption compared to solid materials. Furthermore, while reducing weight, it prevents overall failure due to surface damage.

[0033] Preferably, such as Figure 1 The base 110 is provided with a protective sleeve mounting groove 112, and the protective sleeve 104 is placed in the protective sleeve mounting groove 112. The protective sleeve mounting groove 112 facilitates the installation of the protective sleeve 104.

[0034] A vehicle equipped with the aforementioned air spring shock absorber.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An air spring vibration damper, characterized in that: The device includes a shock absorber body (201) and an air spring assembly. The air spring assembly includes a top mount (101), a rubber bladder (102), a mounting block (106), a base (110), a protective shell (103), a dust cover (105), and a protective sleeve (104). The mounting block (106) is mounted on the shock absorber body (201). The base (110) is connected to the mounting block (106). The rubber bladder (102) is connected to both the base (110) and the top mount (101). The protective sleeve (104) is fitted onto the base (110) and is interference-fitted with the base (110) to form an elastic mating surface (108). The sheath (104) is provided with a plurality of hollow areas (111); the diameter of the sheath (104) gradually decreases from one end near the top seat (101) to the other end; the plurality of hollow areas (111) are arranged on the axial inner wall of the sheath (104); the depth of the hollow areas (111) at different positions is proportional to the diameter of the sheath (104); one end of the base (110) is connected to the mounting block (106), and the other end extends to a position flush with or beyond the piston extension end of the shock absorber body (201), and there is a gap between the inner wall of the base (110) and the shock absorber body (201).

2. The air spring vibration damper according to claim 1, characterized in that: The hollow area (111) is an annular groove structure.

3. An air spring vibration damper according to claim 2, characterized in that: The base (110) is provided with a sleeve mounting groove (112), and the sleeve (104) is disposed in the sleeve mounting groove (112).

4. An air spring vibration damper according to any one of claims 1-3, characterized in that: A first sealing ring (107) is provided between the base (110) and the mounting block (106), and a second sealing ring (109) is provided between the mounting block (106) and the damper body (201).

5. An air spring vibration damper according to claim 4, characterized in that: The first sealing ring (107) is a star-shaped sealing ring, and the first sealing ring (107) forms at least two sealing surfaces with the base (110) and the mounting block (106).

6. A vehicle, characterized in that: The vehicle is equipped with an air spring damper as described in any one of claims 1-5.

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