Passenger car air spring upper support seal decoupling device

Abstract

The utility model provides a kind of passenger car air spring upper support sealing decoupling device, it can be suitable for metal, aluminium plastic composite etc. Upper support structure simultaneously, and sealing is reliable, easy to realize product platform and serialization. It includes upper support body, top glue and baffle, the first through-hole is equipped in the upper support body middle part, the second through-hole is equipped in the top glue, after the first through-hole of top glue installation, the top glue is fixed on the first through-hole by baffle, shock absorber piston rod is passed out to air spring outside by the second through-hole, the top glue includes limit plate, rubber body and metal lining, limit plate, rubber body and metal lining are all cylindrical, the limit plate is located above the metal lining, the top of rubber body is connected with the inside of limit plate, the bottom of rubber body is connected with the periphery of metal lining.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive parts, and in particular to a support sealing decoupling device for air springs in passenger vehicles. Background Technology

[0002] With the rapid development of the automotive industry, air springs for passenger vehicles, as a new type of suspension system, have gradually gained market attention and recognition. Air springs adjust suspension height using air pressure to provide a more comfortable driving experience. This technology meets consumers' growing demand for improved ride comfort. Air springs not only offer precise adjustment and height control but also provide excellent shock absorption performance. Their internal air chambers absorb and disperse impact energy from the road surface, significantly reducing the amount of vibration transmitted to the vehicle body, thereby improving ride comfort.

[0003] Ensuring gas tightness is a fundamental performance requirement for air springs and the basis for achieving other functions. Vehicle front suspension air springs are typically used in conjunction with shock absorbers (integrated spring-machine mechanism). Based on the type of shock absorber, integrated spring-machine mechanism air springs are further divided into top-closed and top-open types. Top-closed air springs are generally used when the shock absorber piston rod does not need to be exposed. This type of structure commonly uses a sealing cap and a single sealing ring for sealing. The top sealing of this type of air spring is relatively simple, mature, and reliable. However, top-open air springs are generally used when the shock absorber piston rod needs to be exposed, such as when the matched shock absorber is an electronically controlled shock absorber with an internal control structure. The sealing of this type of air spring is relatively complex. The lower end of the air spring is connected to the suspension arm, and the upper end of the air spring is connected and fixed to the vehicle body through an upper support sealing mechanism. The piston rod is slidably inserted in the middle of the upper support. Currently, there are few sealing examples, and the universality of different types of upper support sealing structures is poor.

[0004] Currently, the top-open structure air spring support and sealing structure in passenger vehicles can be categorized into two types. One type uses O-rings to seal both the inner and outer skeletons of the top mount with the corresponding components. This structure is only suitable for top mounts with an outer skeleton; it cannot seal top mounts without an outer skeleton, limiting its applicability. The other type uses a sealing diaphragm structure. This structure is generally used for top mounts with an outer skeleton, limiting its application scenarios. Furthermore, it is complex, has many parts, and is costly. The sealing diaphragm is essentially a small airbag, which is technically challenging and expensive. Summary of the Invention

[0005] This utility model provides a sealing decoupling device for the upper support of air springs in passenger vehicles, which can be applied to upper support structures such as metal and aluminum-plastic composite, and has reliable sealing, making it easy to realize product platformization and serialization.

[0006] This utility model solves the above-mentioned technical problems through the following technical solutions. A sealing and decoupling device for an air spring in a passenger vehicle includes an upper support body, a top rubber, and a retaining ring. The upper support body has a first through hole in its middle, and the top rubber has a second through hole. The top rubber cover is located behind the first through hole and is fixed to the first through hole by the retaining ring. The shock absorber piston rod passes through the second through hole to the outside of the air spring. The top rubber includes a limiting plate, a rubber body, and a metal liner. The limiting plate, the rubber body, and the metal liner are all cylindrical. The limiting plate is located above the metal liner. The top of the rubber body is connected to the inside of the limiting plate, and the bottom of the rubber body is connected to the outside of the metal liner.

[0007] The aforementioned air spring support sealing decoupling device for passenger vehicles consists of a limiting plate, a rubber body, and a metal liner connected together by a vulcanization process.

[0008] The aforementioned air spring upper support sealing decoupling device for passenger vehicles includes an aluminum alloy inner skeleton and a nylon outer cladding layer, which are bonded together by injection molding.

[0009] The aforementioned air spring support sealing decoupling device for passenger vehicles has an outer sealing groove at the bottom of the limiting plate, and an outer sealing ring is fitted inside the outer sealing groove.

[0010] The aforementioned air spring support sealing decoupling device for passenger vehicles has an inner sealing groove on the inner wall of the metal liner, and an inner sealing ring is fitted inside the inner sealing groove.

[0011] The aforementioned air spring support sealing and decoupling device for passenger vehicles has a stepped inner wall in the first through hole that matches the shape of the top rubber. From top to bottom, the first through hole comprises a fixing area, a sealing area, and a pressing area. The inner wall of the fixing area is an aluminum alloy inner skeleton. The sealing and pressing areas are covered with nylon outer layers. The upper part of the limiting plate has a fixing section, and the lower part has a decoupling section. The outer diameter of the fixing section is slightly larger than the outer diameter of the sealing end. After assembly... The top of the outer edge of the limiting plate is clearance-fitted with the first through hole, and the bottom edge of the fixing section is pressed against the top of the nylon outer layer of the sealing area; The decoupling section and the clamping area have a gap or an overfit. The lower part of the rubber body is located in the rubber body compression zone and is an interference fit.

[0012] Compared with the prior art, this utility model is widely applicable to the upper support sealing decoupling structure of air springs with integrated machine spring top open structure. It connects the limiting plate, rubber body and metal liner into one piece through rubber vulcanization process, which solves the problem of difficult sealing of top rubber for top open type air springs without outer frame. It can be applied to upper support structures such as metal and aluminum-plastic composite, with reliable sealing and easy to realize product platformization and serialization. Attached Figure Description

[0013] Figure 1 This is a schematic diagram (axial sectional view) of the structure of this utility model. Figure 2 This is a schematic diagram of the top adhesive of this utility model; Figure 3 This is a schematic diagram of the upper support structure of this utility model; Figure 4 This is a schematic diagram of the structure of the metal upper support of this utility model; The markings in the attached diagram represent: 1. Upper support body, 2. Top rubber, 3. Retaining ring, 4. First through hole, 5. Second through hole, 6. Vibration damper piston rod, 7. Limiting plate, 8. Rubber body, 9. Metal liner, 10. Aluminum alloy inner skeleton, 11. Nylon outer layer, 12. Outer sealing ring, 13. Inner sealing ring, 14. Fixing area, 15. Sealing area, 16. Pressing area, 17. Fixing section, 18. Decoupling section. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model.

[0015] like Figures 1 to 4 This utility model includes an upper support body 1, a top adhesive 2, and a retaining ring 3. The upper support body 1 has a first through hole 4 in its middle, and the top adhesive 2 has a second through hole 5. The top adhesive 2 covers the first through hole 4 and is fixed to the first through hole 4 by the retaining ring 3. The shock absorber piston rod 6 passes through the second through hole 5 to the outside of the air spring. The top adhesive 2 includes a limiting plate 7, a rubber body 8, and a metal liner 9. The limiting plate 7, rubber body 8, and metal liner 9 are all cylindrical. The limiting plate 7 is located above the metal liner 9. The top of the rubber body 8 is connected to the inside of the limiting plate 7, and the bottom of the rubber body 8 is connected to the outer wall of the metal liner 9. This forms a rubber isolation layer between the piston rod and the upper support body 1. Utilizing the deformation characteristics of rubber, the sealing characteristics can be enhanced and the sealing effect improved by interference fit between components during assembly, while also reducing vibration transmission.

[0016] To ensure the airtightness of the connection between the limiting plate 7, the rubber body 8, and the metal liner 9, the limiting plate 7, the rubber body 8, and the metal liner 9 are connected as one unit through a vulcanization process to enhance airtightness.

[0017] The upper support 1 includes an aluminum alloy inner skeleton 10 and a nylon outer cladding 11, which are bonded together by injection molding.

[0018] To ensure the airtightness of the connection between the first through hole 4 and the top adhesive 2, the bottom of the limiting plate 7 is provided with an outer sealing groove, and an outer sealing ring 12 is fitted inside the outer sealing groove.

[0019] To ensure airtightness between the piston rod and the top rubber 2, the inner wall of the metal liner 9 is provided with an inner sealing groove, and an inner sealing ring 13 is fitted inside the inner sealing groove.

[0020] The inner wall of the first through hole 4 is stepped and matches the shape of the top adhesive 2. The first through hole 4 is provided with a fixing area 14, a sealing area 15 and a pressing area 16 from top to bottom. The inner wall of the fixing area 14 is an aluminum alloy inner skeleton 10. The sealing area 15 and the pressing area 16 are covered with a nylon outer layer 11. The upper part of the limiting plate 7 is provided with a fixing section 17 and the lower part is provided with a decoupling section 18. The outer diameter of the fixing section 17 is slightly larger than the outer diameter of the sealing end. After assembly: The top of the outer edge of the limiting plate 7 is fitted with the first through hole 4 with a clearance, and the bottom edge of the fixing section 17 is pressed against the top of the nylon outer layer 11 of the sealing area 15. The decoupling section 18 and the pressing area 16 are clearance fit or overfit. By setting the decoupling section, the movement of the air spring and the shock absorber piston rod can be decoupled, reducing the drawbacks of action coupling.

[0021] The bottom of the decoupling section 18 is located in the compression area 16 of the rubber body 8 and is an interference fit. On the one hand, it compensates for the axial installation error of the limiting plate 7, and on the other hand, it acts as an axial limit when the metal liner 9 of the sealing decoupling structure moves downward.

[0022] See Figure 3 and Figure 4 This utility model is also applicable to the all-metal upper support body 1 currently on the market.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sealing decoupling device for an air spring support in a passenger vehicle, characterized in that, The device includes an upper support (1), a top adhesive (2), and a retaining ring (3). The upper support (1) has a first through hole (4) in the middle, and the top adhesive (2) has a second through hole (5). The top adhesive (2) is installed in the first through hole (4) and fixed to the first through hole (4) by the retaining ring (3). The shock absorber piston rod (6) passes through the second through hole (5) to the outside of the air spring. The top adhesive (2) includes a limiting plate (7), a rubber body (8), and a metal liner (9). The limiting plate (7), the rubber body (8), and the metal liner (9) are all cylindrical. The limiting plate (7) is located above the metal liner (9). The top of the rubber body (8) is connected to the inside of the limiting plate (7), and the bottom of the rubber body (8) is connected to the outside of the metal liner (9).

2. The air spring upper support sealing decoupling device for passenger vehicles as described in claim 1, characterized in that, The limiting plate (7), rubber body (8) and metal liner (9) are connected as one unit through a vulcanization process.

3. The air spring upper support sealing decoupling device for passenger vehicles as described in claim 2, characterized in that, The upper support (1) includes an aluminum alloy inner skeleton (10) and a nylon outer cladding (11), which are bonded together by injection molding.

4. The air spring upper support sealing decoupling device for passenger vehicles as described in claim 3, characterized in that, The bottom of the limiting plate (7) is provided with an outer sealing groove, and an outer sealing ring (12) is fitted inside the outer sealing groove.

5. The air spring upper support sealing decoupling device for passenger vehicles as described in claim 4, characterized in that, The inner wall of the metal liner (9) is provided with an inner sealing groove, and an inner sealing ring (13) is fitted inside the inner sealing groove.

6. The air spring upper support sealing decoupling device for passenger vehicles as described in claim 5, characterized in that, The inner wall of the first through hole (4) is stepped and matches the shape of the top adhesive (2). The first through hole (4) is provided with a fixing area (14), a sealing area (15) and a pressing area (16) from top to bottom. The inner wall of the fixing area (14) is an aluminum alloy inner skeleton (10). The sealing area (15) and the pressing area (16) are covered with a nylon outer layer (11). The upper part of the limiting plate (7) is provided with a fixing section (17) and the lower part is provided with a decoupling section (18). The outer diameter of the fixing section (17) is slightly larger than the outer diameter of the sealing end. After assembly, The top of the outer edge of the limiting plate (7) is fitted with the first through hole (4) with a clearance, and the bottom edge of the fixing section (17) is pressed against the top of the nylon outer layer (11) of the sealing area (15); The decoupling section (18) and the clamping area (16) are clearance fit or overfit. The bottom of the decoupling section (18) is located in the compression area (16) of the rubber body (8) and is an interference fit.

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