Air spring structure of integrated multi-cavity air chamber of control tower

Abstract

The invention relates to the technical field of air springs, in particular to an air spring structure with a control tower integrated with a multi-cavity air chamber, which comprises a control tower arranged at the top of an air spring main body, and a main air chamber arranged between the air spring main body and the control tower, the main air chamber comprises a first main air chamber arranged in an inner cavity of the air spring body, a second main air chamber integrally formed on the control tower and a communication assembly arranged between the first main air chamber and the second main air chamber, and a plurality of auxiliary air chambers which are formed in the control tower and are different in volume are arranged on the periphery of the second main air chamber. An energy storage air chamber is formed in one side of the top of the control tower. The vehicle bearing structure control tower and the air spring main body additional air chamber are integrated together, the limitation of space on the volume of an air spring cavity is eliminated, hoisting of the additional air chamber is avoided, vehicle equipment arrangement is greatly facilitated, meanwhile, the situation that the additional air chamber and the air spring main body structure are connected through a long pipeline is avoided, and the cost is reduced. And the air spring hysteresis effect influenced by the pipeline length is eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air spring, in particular to a tower integrated multi-cavity air chamber air spring structure. BACKGROUND

[0002] With the improvement of the shock absorbing performance requirements of the automobile, the application of the air suspension system is more and more widespread; in order to improve the stability and comfort of the vehicle under different working conditions, the active and semi-active suspension systems are also more and more popular. Therefore, the multi-chamber air spring system with adjustable stiffness appears. The main structure of the existing air spring system is usually divided into a main air chamber and one to two auxiliary air chambers, the communication between the main air chamber and the auxiliary air chamber is controlled by the electromagnetic valve, thereby the volume of the air spring participating in the work is controlled, so as to achieve the purpose of adjusting the stiffness of the air spring. However, due to the limitation of the installation space of the air spring, the volume of the main air chamber and the auxiliary air chamber is limited, and the number of auxiliary air chambers is small, so that the stiffness can be adjusted in a small range of four levels at most, which makes the stiffness adjustment have certain limitations. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides a tower integrated multi-cavity air chamber air spring structure, which solves the problem that the integration degree of the existing multi-cavity air chamber air spring structure is not high and is easily limited in space.

[0004] In order to solve the above technical problems, the present application provides the following technical scheme: a tower integrated multi-cavity air chamber air spring structure, comprising a tower arranged on the top of an air spring body, a main air chamber arranged between the air spring body and the tower, the main air chamber comprising a first main air chamber arranged in the inner cavity of the air spring body, a second main air chamber integrally formed on the tower, and a communication assembly arranged between the first main air chamber and the second main air chamber, the periphery of the second main air chamber is provided with a plurality of auxiliary air chambers with different volumes opened in the tower, an energy storage air chamber is opened on one side of the top of the tower, and an electromagnetic valve is arranged in communication on one side of the plurality of auxiliary air chambers and the energy storage air chamber.

[0005] As a further optimization scheme of the present application, the communication assembly comprises a ventilation pipe one fixedly communicated at one end of the top of the air spring body, a ventilation pipe two integrally formed with the tower is sleeved on the top of the ventilation pipe one, and the first main air chamber and the second main air chamber are communicated through the ventilation pipe one and the ventilation pipe two.

[0006] As a further optimization scheme of the present application, the top of the air spring body is movably inserted into the bottom of the tower, three threaded rods arranged in a circumferential array are fixed on the top of the air spring body, and a limiting vertical pipe fixed with the tower is sleeved on the outside of the threaded rods.

[0007] As a further optimization scheme of the present application, the threaded rod extends through the limiting vertical pipe to the top of the tower, and a nut seat in contact with the top of the tower is threadedly connected to the top of the threaded rod.

[0008] As a further optimization scheme of the present application, a solenoid is provided at the top of the electromagnetic valve, and an electronic control unit is electrically connected to the solenoid, and the electronic control unit is electrically connected to the automobile controller.

[0009] As a further optimization scheme of the present application, two air vent ends of the plurality of electromagnetic valves are respectively communicated with passage one and passage two, a plurality of passage twos are respectively communicated with a plurality of auxiliary air chambers and an energy storage air chamber, and the passage two is communicated with the second main air chamber.

[0010] As a further optimization scheme of the present application, the electromagnetic valve is communicated with or disconnected from the second main air chamber, and the electromagnetic valve is detachably mounted on the top of the tower, and the auxiliary air chamber is communicated with or disconnected from the atmosphere through one side of the electromagnetic valve.

[0011] As a further optimization scheme of the present application, one side of the energy storage air chamber is communicated with an air inlet fixed to the tower, and the air inlet is externally connected with an air compressor.

[0012] By the above technical scheme, the present application provides an air spring structure of a tower integrated with a multi-cavity air chamber, which has at least the following beneficial effects compared with the prior art: 1. The present application integrates the vehicle carrying structure tower and the air spring main body additional air chamber together, which avoids the limitation of space on the air spring cavity volume, avoids the hoisting of the additional air chamber, greatly facilitates the vehicle equipment arrangement, avoids the use of long pipeline to connect the additional air chamber and the air spring main body structure, and eliminates the air spring hysteresis effect influenced by the pipeline length.

[0013] 2. The present application sets the first main air chamber on the air spring main body structure and sets the second main air chamber on the tower, which avoids the limitation of the air spring installation space on the air chamber volume, and adjusts the first main air chamber volume through the second main air chamber, so that the air spring can be applied to some high axle load vehicles and maintain low stiffness, further improving the comfort of the vehicle.

[0014] 3. The number of auxiliary air chambers of the present application is not limited, and the volume is adjustable. By combining the on-off of multiple volume auxiliary air chambers, a wide range of air spring working volume and multi-gear high-speed adjustment can be realized, the customer's feeling of stiffness adjustment is more obvious, and through the electric control logic, the air spring stiffness is adjusted in real time according to different working conditions, so that it is possible to improve the vehicle running stability and comfort, and expand the application range of the air spring.

[0015] 4、The present application is provided with an energy storage air chamber, and single air spring rapid rising can be realized through simple electromagnetic valve switching, and the electromagnetic valve is communicated with the atmosphere, and air spring rapid falling can be realized through simple electromagnetic valve switching.

[0016] 5、The present application is provided with an air spring different from traditional multi-cavity integrated air spring and external additional air chamber air spring, and the structure is simple and easy to implement, and the control logic is simple and clear, so that the vehicle can have better stability, comfort, sportiness and passability. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is an explosive structure schematic diagram of the present application; Figure 3 It is a side sectional view of the present application; Figure 4 It is a top sectional view of the present application; Figure 5 It is a partial sectional view of the electromagnetic valve of the present application; Figure 6 It is a principle diagram of the communication path between the second main air chamber and the auxiliary air chamber of the present application; Figure 7 It is a principle diagram of the communication path between the second main air chamber and the atmosphere of the present application.

[0018] In the drawings: 1, air spring main body; 2, tower; 3, main air chamber; 31, first main air chamber; 32, second main air chamber; 321, auxiliary air chamber; 322, energy storage air chamber; 323, electromagnetic valve; 324, air inlet nozzle; 33, communication assembly; 331, air pipe two; 332, air pipe one; 4, threaded rod; 5, limiting vertical pipe; 6, nut seat; 7, solenoid; 8, passage one; 9, passage two. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] First embodiment The current air spring system can also be connected to an external multi-cavity auxiliary air chamber 321 through an air path. The auxiliary air chamber 321 can be suspended under the vehicle. The auxiliary air chamber 321 has multiple cavities and is connected to the main air chamber through an electromagnetic valve 323. The advantage of this scheme is that the auxiliary air chamber 321 does not occupy the air spring installation space, and the number of auxiliary air chambers 321 is large and the volume can be selected within a large range. However, since the auxiliary air chamber 321 needs to be suspended, it occupies the space of the under-vehicle equipment. Moreover, since the air path between the air spring and the auxiliary air chamber 321 is lengthened, the entire system has a hysteresis effect.

[0021] In order to make the integration of the air spring higher and not be limited in space, with reference to Figure 1 Figure 7 The embodiment provides an air spring structure of a tower integrated multi-cavity air chamber, which is composed of an air spring body 1 and a tower 2 integrated with a multi-cavity air chamber. The tower 2 is arranged at the top of the air spring body 1. The structure of the air spring body can adopt an integrated single-cavity air spring with a shock absorber. The tower 2 serves as a bearing structure member for transmitting the load of the vehicle body to the structure of the air spring body 1 for support and transmitting the load to the wheels and the road surface through the structure of the air spring body 1. Meanwhile, the tower 2 is integrated with an additional air chamber of the air spring, thereby shortening the pipeline distance to avoid the hysteresis of the air path, avoiding suspension through integrated design and saving space, and the volume of the air chamber is not limited by the installation space of the air spring.

[0022] The air spring body 1 and the tower 2 are provided with a main air chamber 3. The main air chamber 3 comprises a first main air chamber 31, a second main air chamber 32 and a communication assembly 33. The first main air chamber 31 is arranged in the inner cavity of the air spring body 1. The volume of the first main air chamber 31 is always involved in the damping and vibration isolation work of the air spring structure. The volume of the first main air chamber 31 is relatively fixed because it is limited by the installation space of the structure of the air spring body 1. The second main air chamber 32 is integrally formed on the tower 2. The second main air chamber 32 can be designed according to the performance requirements of the air spring. The second main air chamber 32 is in communication with the first main air chamber 31 in the structure of the air spring body 1 through the communication assembly 33. The volume of the second main air chamber 32 is not limited by space and is always involved in the damping and vibration isolation work of the air spring.

[0023] The communication assembly 33 is arranged between the first main air chamber 31 and the second main air chamber 32. The communication assembly 33 connects the first main air chamber 31 and the second main air chamber 32 in the tower 2 integrated with the multi-cavity air chamber and guarantees the sealing property. The communication assembly 33 comprises a first air pipe 332 fixedly connected to one end of the top of the air spring body 1. The top of the first air pipe 332 is sleeved with a second air pipe 331 integrally formed with the tower 2. The first main air chamber 31 and the second main air chamber 32 are in communication through the first air pipe 332 and the second air pipe 331, so that the air path is in a communication state. The sealing modes including but not limited to O-shaped sealing rings and threaded seals are used to guarantee the air tightness of the overall structure.​

[0024] The second main air chamber 32 is provided with four sub-air chambers 321 of different volumes on the tower 2, respectively, and the four sub-air chambers 321 are respectively a first sub-air chamber 321, a second sub-air chamber 321, a third sub-air chamber 321 and a fourth sub-air chamber 321. An energy storage chamber 322 is provided on one side of the top of the tower 2. The four sub-air chambers 321 and the energy storage chamber 322 are provided with electromagnetic valves 323 on one side in communication. The electromagnetic valves 323 are used to independently control the opening and closing of the air path between the second main air chamber 32 and each sub-air chamber 321. The electromagnetic valves 323 are connected to or disconnected from the second main air chamber 32, and the electromagnetic valves 323 are fixed by riveting or screwing into the top of the tower 2. The sub-air chambers 321 are connected or disconnected to the atmosphere through the electromagnetic valves 323 on one side, thereby changing the volume of the damping and vibration isolation working volume of the air spring, changing the stiffness of the air spring, and improving the comfort of the vehicle under different working conditions.

[0025] In this embodiment, four sub-air chambers 321 of different volumes are provided, and the air path is controlled by the electromagnetic valves 323 to change the stiffness of the air spring. Assuming that the volume of the main air chamber is Vmain1+Vmain2=1200ml, and the volumes of the four sub-air chambers 321 are Vsub1=100ml, Vsub2=200ml, Vsub3=400ml and Vsub4=600ml, then through the combination of the opening and closing of each sub-air chamber 321, the air spring working volume can be formed as shown in Table 1 below: The above table is the air spring working volume adjustment range. According to the above table, a volume adjustment range from 1200ml to 2500ml, a stiffness adjustment mode with a step of 100ml and a total of 14 gears can be formed. Through the above scheme, the stability and comfort of the vehicle can be greatly improved.

[0026] The energy storage chamber 322 is connected to the air inlet 324 fixed to the tower 2 on one side, and the air inlet 324 is connected to the air compressor. The air compressor charges the air inlet 324 and adjusts the air pressure of the energy storage chamber 322, so that it can adapt to various loads and road conditions while maintaining the comfort and stability of the vehicle, providing better driving experience and performance. And the energy storage chamber 322 accumulates a large amount of high-pressure air. When the vehicle needs to improve the passability and the suspension is raised, the electromagnetic valve 323 connecting the energy storage chamber 322 and the main air chamber is opened, so that the high-pressure air in the energy storage chamber 322 enters the main air chamber through the pressure difference, achieving the purpose of quickly raising the suspension. At the same time, when there is no request for suspension heightening, the air compressor is used to inject high-pressure air into the energy storage chamber 322 for next use.

[0027] The electromagnetic valve 323 on the tower 2 is connected with the atmosphere, and any gas chamber is connected with the atmosphere except the energy storage gas chamber 322. When the suspension needs to be lowered, the electromagnetic valve 323 is opened, so that the gas in the main gas chamber is discharged to the atmosphere through the pressure difference, the purpose of rapid lowering of the suspension is achieved, and the adjustment speed of the vehicle suspension is greatly improved.

[0028] Second embodiment In order to ensure the stability of the fixation between the air spring body 1 and the tower 2 and improve the support strength of the whole air spring structure, with reference to Figures 2-4 In this embodiment, the top of the air spring body 1 is movably inserted into the inside of the bottom of the tower 2, the top of the air spring body 1 is fixed with three threaded rods 4 arranged in a circular array, the outside of the threaded rods 4 is sleeved with a limiting vertical pipe 5 fixed with the tower 2, the threaded rods 4 extend to the top of the tower 2 through the limiting vertical pipe 5, and the top of the threaded rods 4 is threadedly connected with a nut seat 6 in contact with the top of the tower 2.

[0029] In assembly, the top of the air spring body 1 is inserted into the inside of the bottom of the tower 2, the three threaded rods 4 are inserted into the limiting vertical pipe 5 and extend to the top of the tower 2, and the threaded rods 4 are fixed on the tower 2 through the nut seat 6, so that the air spring body 1 and the tower 2 are stably fixed.

[0030] Third embodiment In order to make the vehicle have better stability, comfort, sportiness and passability, with reference to Figure 7 In this embodiment, the top of the electromagnetic valve 323 is provided with a solenoid 7, the solenoid 7 is electrically connected with an electronic control unit, the electronic control unit is electrically connected with a vehicle controller, the electromagnetic valve 323 is controlled to open and close by the solenoid 7, the solenoid 7 is electrically connected with the electronic control unit, the opening and closing of the electromagnetic valve 323 is controlled according to the operating condition requirement of the whole vehicle, so as to adjust the appropriate stiffness, charge and discharge air, and the purpose of raising and lowering the air spring is achieved, so that the vehicle has better stability, comfort, sportiness and passability.

[0031] Two air passage ends of the five electromagnetic valves 323 are respectively communicated with a passage one 8 and a passage two 9, the five passage twos 9 are respectively communicated with the four auxiliary gas chambers 321 and the energy storage gas chamber 322, the passage two 9 is communicated with the second main gas chamber 32, the electromagnetic valve 323 is used for connecting and disconnecting the energy storage gas chamber 322 and each gas chamber, high-pressure air is pre-injected into the energy storage gas chamber 322, and when connected, the purpose of rapid air supplement of the air spring rising is achieved.

[0032] The application integrates the vehicle carrying structure tower 2 and the additional air chamber of the air spring body 1 together, gets rid of the space limitation of the air spring chamber volume, avoids the hoisting of the additional air chamber, greatly facilitates the vehicle equipment arrangement, avoids the use of long pipeline to connect the additional air chamber and the air spring body 1 structure, and can adjust the stiffness of the air spring according to the actual use demand.

[0033] The volume of the first main air chamber 31 formed by the air spring structure is limited by the air spring installation space, and the volume is compensated by the second main air chamber 32 integrated on the tower 2 through the connecting assembly. Since the volume of the second main air chamber 32 can be designed at will, the design of the air spring body 1 structure is simpler and more free, and the air spring can be designed to be shorter and smaller, so that the space is saved. Meanwhile, the structure enables the air spring to be applied to some heavy load vehicles.

[0034] The vehicle carrying component tower is integrated with the multi-cavity air chamber, and the additional air chamber does not need to be hoisted and arranged with independent installation space, which is beneficial to the arrangement of the vehicle equipment. The number and volume of the auxiliary air chambers 321 on the tower 2 integrated with the multi-cavity air chamber can be designed according to the demand. The distance between the additional air chamber and the air spring body 1 structure is greatly shortened, and the hysteresis effect caused by the long communication pipeline is avoided.

[0035] By controlling the communication between the main air chamber and each auxiliary air chamber 321, and by arranging and combining the communication states of the main air chamber and the auxiliary air chambers 321 with different volumes, the multi-stage large-range adjustment of the working volume of the air spring is realized, and then the multi-stage large-range instantaneous adjustment of the stiffness of the air spring is realized.

[0036] By controlling the electromagnetic valve 323 to be directly communicated with the atmosphere, the gas in the air spring is discharged, the line length is short, and the flow resistance is small, so that the rapid decline is achieved. By controlling the electromagnetic valve 323 to communicate with the main air chamber, the excess gas in the energy storage air chamber 322 is transmitted into the first main air chamber 31 through the pressure difference, so that the rapid rise is achieved.

[0037] It should be noted that in this text, the term "includes" "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0038] Although the embodiments of the application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A structure of air spring of tower integrated multi-cavity air chamber, comprising a tower (2) arranged at the top of an air spring main body (1), characterized in that: The air spring body (1) and the tower (2) are provided with a main air chamber (3), the main air chamber (3) includes a first main air chamber (31) arranged in the inner cavity of the air spring body (1), a second main air chamber (32) integrally formed on the tower (2), and a communication assembly (33) arranged between the first main air chamber (31) and the second main air chamber (32). The periphery of the second main air chamber (32) is provided with a plurality of auxiliary air chambers (321) with different volumes opened on the tower (2), and an energy storage air chamber (322) is opened on one side of the top of the tower (2), and the plurality of auxiliary air chambers (321) and one side of the energy storage air chamber (322) are both communicated with an electromagnetic valve (323).

2. The air spring structure of claim 1, wherein: The communication assembly (33) includes a ventilation pipe one (332) fixedly communicated at one end of the top of the air spring body (1), and the top of the ventilation pipe one (332) is sleeved with a ventilation pipe two (331) integrally formed with the tower (2), and the first main air chamber (31) and the second main air chamber (32) are communicated through the ventilation pipe one (332) and the ventilation pipe two (331).

3. The air spring structure of claim 1, wherein: The top of the air spring body (1) is movably inserted into the bottom inner side of the tower (2), and the top of the air spring body (1) is fixed with three threaded rods (4) arranged in a circular array, and the outer side of the threaded rod (4) is sleeved with a limiting vertical pipe (5) fixed with the tower (2).

4. The air spring structure of claim 3, wherein: The threaded rod (4) extends through the limiting vertical pipe (5) to the top of the tower (2), and the top of the threaded rod (4) is threadedly connected with a nut seat (6) in contact with the top of the tower (2).

5. The air spring structure of claim 1, wherein: The top of the electromagnetic valve (323) is provided with a solenoid (7), and the solenoid (7) is electrically connected with an electronic control unit, and the electronic control unit is electrically connected with a vehicle controller.

6. The air spring structure of claim 1, wherein: Two ventilation ends of the plurality of electromagnetic valves (323) are respectively communicated with a passage one (8) and a passage two (9), a plurality of passage two (9) are respectively communicated with a plurality of auxiliary air chambers (321) and an energy storage air chamber (322), and the passage two (9) is communicated with the second main air chamber (32).

7. The air spring structure of claim 1, wherein: The electromagnetic valve (323) is communicated or disconnected with the second main air chamber (32), and the electromagnetic valve (323) is detachably installed on the top of the tower (2), and the auxiliary air chamber (321) is communicated or disconnected with the atmosphere through the electromagnetic valve (323) on one side.

8. The air spring structure of claim 1, wherein: One side of the energy storage air chamber (322) is communicated with an air inlet (324) fixed with the tower (2), and the air inlet (324) is externally connected with an air compressor.

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