Car body suspension device for car assembly

Abstract

The invention relates to the technical field of automobile accessories, in particular to an automobile body suspension device for automobile assembly, which comprises a frame body assembly and a spring assembly, the spring assembly comprises a bracket, the bracket is connected to the frame body assembly, the upper end face of the bracket is connected with a frame plate, and the top end of the frame plate is provided with a bottom connecting disc; an air spring is installed on the upper end face of the bottom connecting disc, a top disc is connected to the top of the air spring, and a lifting assembly used for jacking the air spring upwards is arranged on the frame plate. Through the arrangement of the lifting assembly, when an air spring breaks down or leaks air, the driving motor can be rapidly started and push a connecting rod and hinge rod system to be unfolded, the jacking bin lifts the chassis upwards, the situation that the height of a vehicle body drops suddenly or the chassis makes contact with the ground is avoided, and the mechanism can temporarily replace the supporting function of the air spring; the height of a vehicle body is stabilized, the heat dissipation and the safety distance of a power system are maintained, it is ensured that the vehicle can still maintain the basic driving capacity in the fault state, and the road retention risk caused by sudden faults is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts, and particularly to a vehicle suspension device for vehicle assembly. Background Art

[0002] As an advanced automotive suspension system, the air suspension takes the air spring as the core component and realizes the dynamic adjustment of suspension stiffness and height by adjusting the air pressure inside the airbag. In recent years, with the rapid development of new energy vehicles, the application value of the air suspension has been further highlighted. The air suspension can actively adjust the vehicle body height, reduce air resistance during high-speed driving to improve the cruising range, and raise the chassis under complex road conditions to protect the battery pack from being scratched.

[0003] However, as the core component of the existing air suspension, the air spring is easily affected by environmental factors such as vibration, dust, and humidity for a long time, and problems such as airbag aging, air leakage, or valve body failure are likely to occur. Once the air spring fails, the traditional suspension system lacks an emergency support mechanism, resulting in a sudden drop in the vehicle body height, and even the chassis touching the ground in some terrains, making the vehicle unable to drive normally. For new energy vehicles, the chassis touching the ground may directly damage the battery pack, triggering serious safety hazards. In addition, the accumulation of dust or rainwater on the surface of the air spring will accelerate the wear of components and further shorten the service life. After a failure, it is necessary to rely on tow truck rescue or manual repair, and it is difficult to achieve the temporary driving ability in the failure state, seriously affecting the safety of the vehicle and the user experience.

[0004] Therefore, a vehicle suspension device for vehicle assembly is proposed. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a vehicle suspension device for vehicle assembly.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a body suspension device for automobile assembly, comprising a frame assembly and a spring assembly, the spring assembly comprising a bracket, the bracket is connected to the frame assembly, the upper end surface of the bracket is connected to a frame plate, the top end of the frame plate is provided with a bottom connecting plate, the upper end surface of the bottom connecting plate is installed with an air spring, the top of the air spring is connected with a top plate, and a lifting assembly for lifting the air spring upward is provided on the frame plate, the lifting assembly comprises a lifting bin, the lifting bin is arranged above the inner side of the frame plate, the bottom surface of the lifting bin is hinged with an articulated rod 1, the free end of the articulated rod 1 is hinged with a driving rod, the free end of the driving rod is connected with a rod shaft, and the rod shaft passes through a side surface of the frame plate. The end of the rod shaft outside the frame plate is connected with an articulated rod 2, the free end of the articulated rod 2 is hinged with a connecting rod, the free end of the connecting rod is sleeved with a sliding frame, and the side of the sliding frame facing away from the connecting rod is connected with a threaded tube, a driving motor is installed on the frame assembly, and the transmission shaft of the driving motor is connected with a screw, and the screw is threadedly connected to the threaded tube, a sleeve frame is connected to the side of the frame plate, a plug rod is sleeved in the sleeve frame, a convex plate is provided at the bottom end of the plug rod, and the top of the plug rod is connected to the bottom connecting plate, a fixed frame plate is connected to the connecting rod, the fixed frame plate is in contact with the plug rod, and a row of teeth is connected to one side of the fixed frame plate corresponding to the plug rod, and a plurality of tooth grooves suitable for the teeth are opened on the plug rod. The jacking bin includes two upper and lower corresponding bin plates, and a spring damping rod is installed between the bin plates.

[0007] As a preferred technical solution of the present invention, a cleaning component is arranged on the bottom connecting plate, and the cleaning component includes an air cylinder ring, which is connected to the upper end surface of the bottom connecting plate, an air spring is located at the inner ring of the air cylinder ring, a one-way valve 1 is arranged on the top surface of the air cylinder ring, a one-way valve 2 is installed and connected to the bottom surface of the air cylinder ring, a piston ring is sleeved inside the air cylinder ring, a plug rod is connected to the top end of the piston ring, a through hole penetrating the plug rod is provided on the bottom surface of the piston ring at a position corresponding to the plug rod, the end of the plug rod is connected and connected to the one-way valve 1, the free end of the one-way valve 1 is connected and connected to a pressure cylinder, and the free end of the pressure cylinder is connected to the one-way valve 1. The end is connected to the top plate, and a plurality of fixed plates are connected in an annular manner to the top surface of the top plate. The free end of the fixed plate is bent downward, and a cleaning plate is connected to a side of the fixed plate corresponding to the air spring. An air hole is provided on the side of the cleaning plate corresponding to the air spring. The side of the pressure cylinder is connected and communicated with an inlet pipe, and the free end of the inlet pipe is connected and communicated with the cleaning plate at the corresponding position. A spacing is left between the inner ring of the air cylinder ring and the air spring, and a plurality of dust exhaust holes are provided at the position corresponding to the inner ring of the air cylinder ring on the bottom connecting plate. The free end of the second one-way valve is connected and communicated with a filter cylinder, and the bottom surface of the filter cylinder is open and connected with a screen.

[0008] As a preferred technical solution of the present invention, a limit assembly for fixing the longitudinal position of the air spring is arranged between the lifting assembly and the cleaning assembly, the limit assembly includes a medium cylinder, the medium cylinder is connected to the inside of the frame plate, a piston is sleeved in the medium cylinder, a push rod is connected to the end of the piston, the push rod passes through the medium cylinder, an injection pipe is connected and connected to the medium cylinder, the free end of the injection pipe is connected and connected to the upper side of the air cylinder ring, the free end of the push rod is rotatably connected to a roller, and the roller abuts against the hinge rod 1 and the driving rod.

[0009] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0010] 1. The present invention is provided with a lifting component. When the air spring fails or leaks, the driving motor can be quickly started to push the connecting rod and the articulated rod system to unfold, so that the lifting bin lifts the chassis upward to prevent the vehicle body from dropping suddenly or the chassis from touching the ground. This mechanism can temporarily replace the supporting function of the air spring, help stabilize the vehicle body height, maintain the heat dissipation and safety distance of the power system, ensure that the vehicle can still maintain basic driving ability in a fault state, reduce the risk of road detention due to sudden failures, and is particularly suitable for emergency escape scenarios of new energy vehicles under battery pack protection requirements.

[0011] 2. The cleaning component of the present invention uses the linkage structure of the cylinder ring, piston ring and pressure cylinder. During the daily inflation and deflation of the air spring, the directional flow of compressed air is transported to the air holes of the cleaning plate through the inlet pipe to continuously clean the outer surface of the air spring with wind. This process can effectively remove pollutants such as dust and mud, which helps to extend the service life of the air spring while reducing the maintenance frequency and cost.

[0012] 3. The limit assembly of the present invention transmits the pressure of the hydraulic oil in the medium cylinder, and synchronously pushes the push rod when the lifting assembly is actuated, thereby limiting the longitudinal displacement of the air spring, thereby further improving the driving stability of the vehicle body under the state of suspension failure, and avoiding the increase of vehicle body instability caused by the expansion and contraction of the air spring 15 due to vibration force when the vehicle body is driving.

[0013] 4. The present invention can fix the chassis position in a non-fault state through the meshing structure of the plug rod and the latch teeth, avoiding loosening of components due to vibration during vehicle driving, thereby improving the overall rigidity of the suspension system in normal and fault states, and can effectively suppress abnormal shaking in bumpy road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the spring assembly of the present invention;

[0016] Figure 3Schematic diagram of the bottom surface structure of the spring assembly of the present invention;

[0017] Figure 4 Schematic cross-sectional view of the frame plate of the present invention;

[0018] Figure 5 Schematic diagram of the rear side structure of the spring assembly of the present invention;

[0019] Figure 6 Schematic diagram of the internal structure of the cleaning assembly of the present invention.

[0020] Wherein: 10, frame body assembly; 11, spring assembly; 12, bracket; 13, frame plate; 14, bottom connection disk; 15, air spring; 16, top disk; 17, jacking bin; 18, first articulated rod; 19, drive rod; 20, rod shaft; 21, second articulated rod; 22, connecting rod; 23, sliding frame; 24, drive motor; 25, sleeve frame; 26, inserting rod; 27, fixed frame plate; 28, cogs; 29, spring damping rod; 30, air cylinder ring; 31, check valve one; 32, check valve two; 33, piston ring; 34, pressing cylinder; 35, fixing plate; 36, cleaning plate; 37, inlet pipe; 38, plug rod; 39, dust discharge hole; 40, filter cartridge; 41, medium cartridge; 42, push rod; 43, roller; 44, injection pipe. Specific embodiments

[0021] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative labor all belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0022] Example: As Figure 1As shown, a body suspension device for automobile assembly includes a frame component 10 and a spring component 11. The frame component 10 adopts a conventional structural design, which is not described in detail in this application. The spring component 11 is connected to the frame component 10. The spring component 11 includes a bracket 12, which is connected to the frame component 10 in an inclined state. The upper end surface of the bracket 12 is connected to a frame plate 13, and the frame plate 13 is U-shaped. A bottom connecting plate 14 is provided at the top of the frame plate 13. An air spring 15 is installed on the upper end surface of the bottom connecting plate 14, and a top plate 16 is connected to the top of the air spring 15. It should be noted that the air spring 15 is an existing well-known technology, an air bag is provided on the surface, and an air damping control valve is provided inside. It is an existing well-known technology and is not described in detail here. The air supply unit, sensor, control system and other control units of the air spring 15 all adopt existing well-known technologies and conventional settings, which are not described in detail here.

[0023] Specifically, after the frame assembly 10 is assembled on the vehicle body, the vehicle body is supported by the air spring 15 , and the control unit is used to control the inflation and deflation of the air spring 15 to buffer the vibration during the driving of the vehicle.

[0024] like Figure 1 , Figure 2 and Figure 4 As shown, a lifting assembly for lifting the air spring 15 upward is provided on the frame plate 13, and the lifting assembly includes a lifting bin 17, which is arranged above the inner side of the frame plate 13 and connected to the bottom connecting plate 14, and a hinge rod 18 is hinged on the bottom surface of the lifting bin 17, and the hinge rod 18 is arranged in an inclined manner, and a driving rod 19 is hinged at the free end of the hinge rod 18, and a rod shaft 20 is connected to the free end of the driving rod 19, and the rod shaft 20 passes through a side surface of the frame plate 13, and an end of the rod shaft 20 located outside the frame plate 13 is connected to a hinge rod 21, and the hinge rod 21 is inclined. The free end of the hinged rod 21 is hinged with a connecting rod 22, the cross-section of the free end of the connecting rod 22 is T-shaped, and the free end of the connecting rod 22 is sleeved with a sliding frame 23. The connecting rod 22 can slide in the sliding frame 23, and the side of the sliding frame 23 facing away from the connecting rod 22 is connected with a threaded tube. A driving motor 24 is installed on the frame assembly 10, and the driving motor 24 adopts a self-locking motor. It should be noted that the driving motor 24 is installed in the suspension system in the prior art on a structure not shown in this embodiment, and the transmission shaft of the driving motor 24 is connected with a screw, which is threadedly connected to the threaded tube.

[0025] Specifically, when a failure occurs in the air spring 15 resulting in the lowering of the vehicle body, the drive motor 24 is activated. The drive shaft of the drive motor 24 rotates and drives the connecting rod 22 to move through a threaded connection. When the connecting rod 22 moves, it drives the second articulated rod 21 to rotate around the rod shaft 20. The connecting rod 22 adapts to the change in the height position on the second articulated rod 21 by sliding within the sliding frame 23. The drive rod 19 rotates along with the second articulated rod 21 and drives the first articulated rod 18 to expand from the retracted state. As a result, the lifting chamber 17 rises within the frame plate 13, generating a thrust on the bottom connection disk 14 to lift it, thereby lifting the vehicle body and enabling the vehicle body to recover from the tilted or low position state. To a certain extent, the driving function is restored, avoiding the problem that when the air spring 15 is damaged or fails, the vehicle cannot move or continues to move, resulting in greater risks.

[0026] As Figure 2 shown, a sleeve frame 25 is connected to the side of the frame plate 13. An insertion rod 26 is sleeved within the sleeve frame 25. A convex plate is provided at the bottom end of the insertion rod 26, and the top end of the insertion rod 26 is connected to the bottom connection disk 14. A fixed frame plate 27 is connected to the connecting rod 22, and the fixed frame plate 27 abuts against the insertion rod 26. A row of locking teeth 28 is connected to the side of the fixed frame plate 27 corresponding to the insertion rod 26, and a number of tooth grooves adapted to the locking teeth 28 are provided on the insertion rod 26.

[0027] Specifically, in the initial state, the lifting chamber 17 is located within the frame plate 13. The locking teeth 28 are inserted into the tooth grooves on the insertion rod 26 to fix the insertion rod 26, thereby fixing the position of the bottom connection disk 14 to ensure its stability. When it is necessary to lift the air spring 15, the connecting rod 22 moves, causing the locking teeth 28 to disengage from the insertion rod 26, allowing the insertion rod 26 to slide within the sleeve frame 25, so that the air spring 15 can be lifted upward.

[0028] As Figure 4 shown, the lifting chamber 17 includes two upper and lower corresponding chamber plates, and a spring damper rod 29 is installed between the chamber plates. The spring damper rod 29 is a well-known prior art and will not be elaborated here.

[0029] Specifically, after the air spring 15 is lifted, the spring damper rod 29 is placed between the air spring 15 and the first articulated rod 18. Utilizing the vibration damping and buffering function of the air spring 15, the continuous driving function of the vehicle is further ensured, and the instability of the vehicle during the failure or damage of the air spring 15 is reduced.

[0030] As Figure 1 、 Figure 3 and Figure 6As shown in the figure, a cleaning component is provided on the bottom connection plate 14. The cleaning component includes an air cylinder ring 30. The air cylinder ring 30 is connected to the upper end face of the bottom connection plate 14. The air spring 15 is located inside the inner ring of the air cylinder ring 30. A check valve 31 is provided on the top surface of the air cylinder ring 30. A check valve 32 is installed and communicated with the bottom surface of the air cylinder ring 30. Both the check valve 31 and the check valve 32 are well-known prior arts. The check valve 31 can allow the medium to flow to the outside of the air cylinder ring 30, and the check valve 31 can allow the medium to flow into the air cylinder ring 30. A piston ring 33 is sleeved inside the air cylinder ring 30. The top end of the piston ring 33 is connected to a piston rod 38. A through hole penetrating the piston rod 38 is provided at the position corresponding to the piston rod 38 on the bottom surface of the piston ring 33. The end of the piston rod 38 is connected and communicated with the check valve 31. The free end of the check valve 31 is connected and communicated with a pressure cylinder 34. The free end of the pressure cylinder 34 is connected to the top plate 16. A plurality of fixing plates 35 are annularly connected to the top surface of the top plate 16. The free ends of the fixing plates 35 are bent downward. A cleaning plate 36 is connected to the surface of the fixing plate 35 corresponding to the air spring 15. A through hole is provided on the surface of the cleaning plate 36 corresponding to the air spring 15. A guiding pipe 37 is connected and communicated with the side surface of the pressure cylinder 34. The free end of the guiding pipe 37 is connected and communicated with the cleaning plate 36 at the corresponding position.

[0031] Specifically, during the inflation and deflation process of the air spring 15, the end of the air spring 15 will drive the top plate 16 to rise and fall. When the top plate 16 rises, the piston ring 33 rises inside the air cylinder ring 30. The piston ring 33 draws air from the outside of the air cylinder ring 30 into the air cylinder ring 30 through the check valve 32. Then when the top plate 16 descends, the piston ring 33 squeezes the air inside the air cylinder ring 30 and presses it out through the through hole at the bottom. The compressed air passes through the check valve 31 and the pressure cylinder 34, and finally is discharged onto the air spring 15 through the cleaning plate 36, thereby performing wind cleaning on the outer wall of the air spring 15, improving the surface cleanliness of the air spring 15, and thus being beneficial to improving the service life of the air spring 15.

[0032] As Figure 3 shown, there is a gap between the inner ring of the air cylinder ring 30 and the air spring 15. A plurality of dust discharge holes 39 are provided on the bottom connection plate 14 at the position corresponding to the inner ring of the air cylinder ring 30.

[0033] Specifically, dust, rainwater, etc. are discharged through the dust discharge holes 39 under the wind cleaning of the air spring 15.

[0034] As Figure 3 shown, the free end of the check valve 32 is connected and communicated with a filter cylinder 40. The bottom surface of the filter cylinder 40 is open and connected with a screen.

[0035] Specifically, the air drawn in by the check valve II 32 is filtered through the filter cartridge 40 to improve the cleanliness of the air for cleaning. The opening of the filter cartridge 40 faces downward, and during the vehicle's driving, the filtered medium is shaken off through vibration, thereby increasing the service life of the filter cartridge 40.

[0036] As Figure 4 and Figure 5 shown, a limit component for fixing the longitudinal position of the air spring 15 is provided between the lifting component and the cleaning component. The limit component includes a medium cylinder 41, the medium cylinder 41 is connected inside the frame plate 13, a piston is sleeved inside the medium cylinder 41, a push rod 42 is connected to the end of the piston, the push rod 42 penetrates through the medium cylinder 41, a roller 43 is rotatably connected to the free end of the push rod 42, the roller 43 abuts against the first articulated rod 18 and the driving rod 19, an injection pipe 44 is connected and communicated with the medium cylinder 41, the free end of the injection pipe 44 is connected and communicated with the upper side of the air cylinder ring 30, and the medium cylinder 41 is filled with hydraulic oil.

[0037] Specifically, after the first articulated rod 18 and the driving rod 19 are straightened, the piston connected to the push rod 42 is pushed to squeeze the hydraulic oil in the medium cylinder 41, so that the medium cylinder 41 injects the hydraulic oil into the air cylinder ring 30 through the injection pipe 44. Then, the hydraulic oil applies pressure from above the piston ring 33 to restrict the upward movement of the piston ring 33, and thus the height of the air spring 15 is also fixed. Therefore, when the air spring 15 is damaged or fails, and when the lifting component replaces the air spring 15 to support, the air spring 15 connected to the vehicle body will not produce telescopic movement, thereby further improving the driving stability of the vehicle body and avoiding the increase in vehicle body instability caused by the telescopic vibration of the air spring 15 during vehicle driving.

[0038] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited thereto. Various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the art to which the present invention pertains.

Claims

1. A vehicle body suspension device for vehicle assembly, comprising a frame assembly (10) and a spring assembly (11), characterized in that, The spring assembly (11) comprises a bracket (12), the bracket (12) is connected to the frame assembly (10), the upper end surface of the bracket (12) is connected to a frame plate (13), the top end of the frame plate (13) is provided with a bottom connecting plate (14), the upper end surface of the bottom connecting plate (14) is installed with an air spring (15), the top of the air spring (15) is connected with a top plate (16), the frame plate (13) is provided with a lifting assembly for lifting the air spring (15) upward, the lifting assembly comprises a lifting bin (17), the lifting bin (17) is arranged on the upper inner side of the frame plate (13), the bottom surface of the lifting bin (17) is hinged with a hinged rod (18), the free end of the hinged rod (18) is hinged with a driving rod (19), the driving rod (19) is driven by the lifting bin (17), and the lifting bin (17) is connected to the frame plate (13). The free end of the rod (19) is connected to a rod shaft (20), the rod shaft (20) passes through a side surface of the frame plate (13), the end of the rod shaft (20) located outside the frame plate (13) is connected to a hinged rod 2 (21), the free end of the hinged rod 2 (21) is hinged to a connecting rod (22), the free end of the connecting rod (22) is sleeved with a sliding frame (23), the side of the sliding frame (23) facing away from the connecting rod (22) is connected to a threaded tube, a driving motor (24) is installed on the frame assembly (10), the transmission shaft of the driving motor (24) is connected to a screw, the screw is threadedly connected to the threaded tube, a cleaning assembly is arranged on the bottom connecting plate (14), and a limit assembly for fixing the longitudinal position of the air spring (15) is arranged between the lifting assembly and the cleaning assembly.

2. The vehicle body suspension device for vehicle assembly according to claim 1, characterized in that, The side of the frame plate (13) is connected to a sleeve frame (25), an insertion rod (26) is sleeved in the sleeve frame (25), a convex plate is provided at the bottom end of the insertion rod (26), the top end of the insertion rod (26) is connected to the bottom connection plate (14), a fixed frame plate (27) is connected to the connecting rod (22), the fixed frame plate (27) abuts against the insertion rod (26), a row of latching teeth (28) is connected to one side of the fixed frame plate (27) corresponding to the insertion rod (26), and a plurality of tooth grooves adapted to the latching teeth (28) are provided on the insertion rod (26).

3. The vehicle body suspension device for vehicle assembly according to claim 2, characterized in that, The lifting bin (17) comprises two upper and lower corresponding bin plates, and a spring damping rod (29) is installed between the bin plates.

4. A vehicle body suspension device for vehicle assembly according to claim 2, characterized in that, The cleaning assembly includes an air cylinder ring (30). The air cylinder ring (30) is connected to the upper end surface of the bottom connection disk (14). The air spring (15) is located inside the inner circle of the air cylinder ring (30). A check valve one (31) is arranged on the top surface of the air cylinder ring (30). A check valve two (32) is installed and communicated at the bottom surface of the air cylinder ring (30). A piston ring (33) is sleeved inside the air cylinder ring (30). The top end of the piston ring (33) is connected to a plug rod (38). A through hole penetrating the plug rod (38) is opened at the bottom surface of the piston ring (33) corresponding to the position of the plug rod (38). The end of the plug rod (38) is connected and communicated with the check valve one (31). The free end of the check valve one (31) is connected and communicated with a pressure cylinder (34). The free end of the pressure cylinder (34) is connected to the top disk (16). A plurality of fixing plates (35) are annularly connected to the top surface of the top disk (16). The free ends of the fixing plates (35) are bent downward. A cleaning plate (36) is connected to one side of the fixing plates (35) corresponding to the air spring (15). Air holes are opened on one side of the cleaning plate (36) corresponding to the air spring (15). A guiding pipe (37) is connected and communicated to the side surface of the pressure cylinder (34). The free end of the guiding pipe (37) is connected and communicated with the cleaning plate (36) at the corresponding position.

5. The vehicle body suspension device for vehicle assembly according to claim 4, characterized in that, The limiting assembly includes a medium cylinder (41). The medium cylinder (41) is connected inside the frame plate (13). A piston is sleeved inside the medium cylinder (41). The end of the piston is connected to a push rod (42). The push rod (42) penetrates through the medium cylinder (41). An injection pipe (44) is connected and communicated to the medium cylinder (41). The free end of the injection pipe (44) is connected and communicated to the upper side of the air cylinder ring (30).

6. The vehicle body suspension device for vehicle assembly according to claim 5, characterized in that, A roller (43) is rotatably connected to the free end of the push rod (42). The roller (43) abuts against the hinge rod one (18) and the driving rod (19).

7. A vehicle body suspension device for vehicle assembly according to claim 4, characterized in that, A gap is left between the inner circle of the air cylinder ring (30) and the air spring (15). A plurality of dust exhaust holes (39) are opened at the position of the bottom connection disk (14) corresponding to the inner circle of the air cylinder ring (30).

8. A vehicle body suspension device for vehicle assembly according to claim 4, characterized in that, The free end of the check valve two (32) is connected and communicated with a filter cylinder (40). The bottom surface of the filter cylinder (40) is open and connected with a screen.

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