A variable volume damping double tube double chamber air spring structure

Abstract

The application discloses a double-tube double-chamber air spring structure with variable volume damping, which comprises a main air chamber, a compression throttling pipe, a stretching throttling pipe, a one-way valve, an additional air chamber, a water conveying pipe and a water storage tank, wherein the main air chamber is composed of an upper cover plate, a rubber skin bag and a piston base; the additional air chamber is arranged outside the main air chamber; the compression throttling pipe and the stretching throttling pipe are sealingly arranged on the outer upper end of the main air chamber and the additional air chamber to connect the two air chambers; the one-way valve is arranged in the middle end of the pipeline of the compression throttling pipe and the stretching throttling pipe; and the water conveying pipe is connected with the water storage tank and a sprayer in the additional air chamber. The application is suitable for vehicle application scenarios with high ride comfort requirements, has the functions of increasing the rebound damping, improving the damping ratio in the stretching stage and the compression stage of the air spring, and changing the air chamber volume, and has the characteristics of three-stage continuous variable stiffness.

Description

Technical Field

[0001] This invention patent belongs to the field of air spring technology, specifically relating to a variable volume damping double-tube double-chamber air spring structure. This novel air spring structure is suitable for vehicle application scenarios with high ride comfort requirements. Background Technology

[0002] Air springs are components used in vehicle suspensions to dampen vibrations, cushion impacts, and adjust suspension height. Different structures are employed for different applications. Dual-tube, dual-chamber air springs offer better air damping characteristics and lower dynamic stiffness compared to single-chamber air springs, making them more suitable for passenger vehicles. Most commercially available air springs use metal for the top cover and base, while the rubber bladder is made of rubber and nylon. Air springs are extremely important components; their quality and performance directly affect suspension characteristics. The selection and installation of air springs must be based on the actual interior space of the vehicle. The structure of the air spring is specifically adjusted according to the vehicle's ride comfort and driving handling requirements.

[0003] Existing air springs on the market cannot achieve continuously variable stiffness and have restoring damping greater than compression damping, which makes the suspension's shock absorption and cushioning capabilities weak and unable to meet the requirements for ride comfort. Summary of the Invention

[0004] The purpose of this invention is to provide a variable volume damping double-tube double-chamber air spring structure to solve the defects in the above-mentioned background technology, namely, the existing air springs cannot achieve continuous variable stiffness and the restoring damping is greater than the compression damping, resulting in weak vibration reduction and buffering capabilities.

[0005] To achieve the above objectives, this invention provides the following technical solution: a variable volume damping dual-tube dual-chamber air spring structure, comprising a main air chamber, a compression throttling tube, a tension throttling tube, a one-way valve, an auxiliary air chamber, a water supply pipe, and a water storage tank. The main air chamber consists of an upper cover plate, a rubber bladder, and a piston base. The auxiliary air chamber is a second chamber located outside the main air chamber. The compression throttling tube and the tension throttling tube are sealed and installed at the upper ends of the main air chamber and the auxiliary air chamber, connecting the two air chambers. The one-way valve is installed at the middle end of the compression throttling tube and the tension throttling tube. The water supply pipe connects the water storage tank to a sprayer installed in the auxiliary air chamber.

[0006] As a limitation, the main air chamber upper cover plate is sealed with openings and is connected to the compression throttling pipe and the tension throttling pipe.

[0007] As another limitation, the rubber bladder and piston base need to be clamped together to prevent them from falling off.

[0008] As another limitation, the rubber bladder needs to undergo high-temperature vulcanization treatment.

[0009] As another limitation, the rubber bladder has a composite layer structure and is made of rubber and nylon.

[0010] As another limitation, the main air chamber is equipped with a first-level drying layer, a waterproof and breathable membrane, and a second-level drying layer.

[0011] As another limitation, the first and second drying layers are made of high-density absorbent sponge.

[0012] As another limitation, the outer sides of the first-stage drying layer and the second-stage drying layer are designed with mounting grooves that connect to the annular protruding limiting block located inside the rubber bladder of the main air chamber.

[0013] As another limitation, the waterproof and breathable membrane is stretchable and is glued to the inside of the main air chamber rubber bladder.

[0014] As another limitation, the diameter of the compression throttling tube is slightly smaller than that of the stretching throttling tube, and the pipeline of the compression throttling tube is designed as a serpentine curve.

[0015] As another limitation, the one-way valve is installed in the middle of the overall pipeline of the compression throttling pipe and the extension throttling pipe, and the one-way valves corresponding to the compression throttling pipe and the extension throttling pipe allow the gas to flow in opposite directions.

[0016] As another limitation, the top opening of the additional air chamber is sealed and connected to the compression throttle tube and the tension throttle tube.

[0017] As another limitation, the additional air chamber housing is made of aluminum alloy.

[0018] As another limitation, the additional air chamber is axially opened with three separate chambers of unequal volume, and the gas exchange between the three chambers is through a throttling orifice at the center of the air chamber partition.

[0019] As another limitation, a sprayer is installed near the connection of the tension throttle tube in the axial top chamber of the auxiliary air chamber, and water mist is sprayed into the auxiliary air chamber only during the air spring tensioning phase.

[0020] As another limitation, the additional air chamber has a rotary motor that works in conjunction with a rotary cover to control the opening size of the throttling orifice.

[0021] As another limitation, the rotating cover plate is tightly fitted to the air chamber partition, and no air leakage occurs between the chambers when the throttling orifice is closed.

[0022] The technological advancements achieved by this invention patent compared to existing patent technologies are as follows:

[0023] This invention patent discloses a variable volume damping dual-tube dual-chamber air spring structure, which sequentially comprises a main air chamber, a compression throttling tube, a tension throttling tube, a one-way valve, an auxiliary air chamber, a water supply pipe, and a water storage tank. The main air chamber consists of a top cover plate with a limiting buffer block, a rubber bladder, and a piston base. The main air chamber contains a first-stage drying layer, a waterproof and breathable membrane, a second-stage drying layer, and an annular protruding limiting block. This design effectively dries the humid gas entering the main air chamber during the tensioning stage of the air spring. The top cover plate of the main air chamber has an opening for sealing connection between the compression throttling tube and the tension throttling tube. The compression throttling tube has a small diameter and is a serpentine curved pipe, while the tension throttling tube has a large diameter and is a straight pipe. This design effectively improves the efficiency of the tensioning and compression stages under medium-frequency excitation. The damping ratio is controlled by a one-way valve connecting the compression throttle tube and the extension throttle tube. This design prevents the gas from reciprocating in the pipeline and effectively reduces the inertial force of the gas flow in the pipeline. The ends of both throttle tubes are sealed to the auxiliary air chamber. The outer shell of the auxiliary air chamber is made of aluminum alloy, which ensures the strength of the auxiliary air chamber and prevents damage to the auxiliary air chamber. A sprayer is installed inside the auxiliary air chamber. This design can humidify the gas in the pipe during the extension stage, thereby improving the recovery damping. The auxiliary air chamber has two layers of air chamber partitions and two throttle holes at the center, two rotating cover plates and two rotating motors. This design allows the effective volume of the air spring to change continuously in three stages, thereby making the stiffness continuously variable.

[0024] The variable damping volume dual-tube dual-chamber air spring structure of this invention patent has the functions of increasing the recovery damping, improving the damping ratio of the air spring in the tension and compression stages, and changing the size of the air chamber, thus having the characteristic of three-level continuously variable stiffness compared with the common air springs on the market.

[0025] In summary, the variable volume damping dual-tube dual-chamber air spring structure of this invention is easy to install, has good vibration damping and buffering capabilities, improves suspension performance, enhances vehicle ride comfort, and is suitable for all types of passenger vehicles. Attached Figure Description

[0026] The following describes embodiments of the present invention patent, wherein,

[0027] Figure 1 This is a schematic diagram of the structure of the present invention patent;

[0028] Figure 2 This is a schematic diagram of the electronic control components of this invention patent;

[0029] Figure 3 This is a schematic diagram of the main air chamber according to an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of an additional air chamber in an embodiment of the present invention.

[0031] Figure 5 This is a schematic diagram of another structure of the additional air chamber in an embodiment of the present invention.

[0032] Figure 6 This is a schematic diagram of a one-way valve according to an embodiment of the present invention.

[0033] Components marked: 1-Main air chamber, 101-Upper cover plate, 102-Rubber bladder, 103-Piston base, 104-First-stage drying layer, 105-Waterproof and breathable membrane, 106-Second-stage drying layer, 107-Annular protruding limiting block, 2-Compression throttling tube, 3-Tension throttling tube, 4-One-way valve, 5-Auxiliary air chamber, 501-Sprayer, 502-Rotary motor, 503-Rotating cover plate, 504-Air chamber partition, 505-Throttle orifice, 6-Water supply pipe, 7-Water storage tank. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0035] An embodiment of a variable volume damping dual-tube dual-chamber air spring structure.

[0036] This embodiment discloses a variable volumetric damping dual-tube dual-chamber air spring structure, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the device includes a dual-tube, dual-chamber air spring structure. This structure sequentially comprises a main air chamber 1, a compression throttle tube 2, a tension throttle tube 3, a one-way valve 4, and an auxiliary air chamber 5. The main air chamber 1 includes a top cover plate 101 with a limiting buffer block, a rubber bladder 102, a first-stage drying layer 104, a waterproof and breathable membrane 105, a second-stage drying layer 106, and a piston base 103. The top cover plate 101 of the main air chamber 1 has an opening for sealing and connects to the compression throttle tube 2 and the tension throttle tube 3. The outer sides of the first-stage drying layer 104 and the second-stage drying layer 106 are designed with mounting grooves that connect with the annular protruding limiting block 107 located inside the rubber bladder 102. Connections; the compression throttling pipe 2 has a small diameter and is a serpentine curved pipe, while the extension throttling pipe 3 has a large diameter and is a straight pipe. This configuration improves the damping ratio of the air spring during the extension and compression stages under medium-frequency excitation. A one-way valve 4 connects the compression throttling pipe 2 and the extension throttling pipe 3. This configuration prevents the gas from reciprocating in the pipeline and delays the isolation between the main air chamber 1 and the auxiliary air chamber 5. The ends of both throttling pipes are sealed to the auxiliary air chamber 5. An atomizer 501 is installed inside the auxiliary air chamber 5. This configuration allows for humidification of the gas inside the pipe only during the extension stage. The water supply pipe 6 connects the water storage tank 7 to the atomizer 501. Assuming the air spring is initially in the extension stage... As the piston base 103 moves downward, the rubber bladder 102 is stretched, increasing the volume of the main air chamber 1 and reducing its internal pressure. Due to the restriction of the one-way valve 4, the gas flows from the auxiliary air chamber 5 to the main air chamber 1 only through the stretching throttle tube 3. The water mist sprayed by the atomizer 501 in the auxiliary air chamber 5 is drawn into the stretching throttle tube 3 by the airflow, humidifying the air inside and increasing the recovery damping. After entering the main air chamber 1, the humidified gas moves towards the bottom due to airflow inertia, undergoing the first drying stage 104 for initial drying. Upon passing through the waterproof and breathable membrane 105, the moisture in the humid air remains on the membrane, marking the second drying process. The air film 105 moves downward due to the airflow and comes into contact with the second-stage drying layer 106 to achieve the third drying of the humid air; then it enters the compression stage, the piston base 103 moves upward, and the gas in the main air chamber moves upward due to the pressure difference, passes through the second-stage drying layer 106 for the fourth drying, and then passes through the waterproof and breathable membrane 105 for the fifth drying. The waterproof and breathable membrane 105 moves upward under the action of the airflow and its surface touches the first-stage drying layer 104. The moisture remaining on the membrane surface during the stretching stage is absorbed. Finally, the gas passes through the first-stage drying layer 104 for the sixth drying and enters the compression throttle tube 2 and is carried to the auxiliary air chamber 5. At this point, one working cycle of the air spring is completed.The auxiliary air chamber is equipped with two layers of air chamber baffles 504, two throttling orifices 505 at their center, two rotating cover plates 503, and two rotating motors 502. The rotating cover plates 503 are tightly fitted with the air chamber baffles 504. Assuming that the rotating motors 502 are controlled and apply torque to drive the rotating cover plates 503 to rotate, the opening of the throttling orifices 505 at the center of the air chamber baffles 504 will decrease or increase, thereby changing the airflow exchange rate between the chambers, thus achieving continuous variable volume in three stages.

[0037] The above content is an example of specific embodiments of the present invention. For principles and structures not described in detail, it should be understood that they are implemented using general principles and structures already existing in the field.

[0038] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A variable volumetric damped double-tube double-chamber air spring structure, characterized in that, The variable volume damping double-tube double-chamber air spring structure includes a main air chamber (1), a compression throttling pipe (2), a tension throttling pipe (3), a one-way valve (4), an auxiliary air chamber (5), a water supply pipe (6), and a water storage tank (7). The main air chamber (1) consists of an upper cover plate (101) with a limiting buffer block, a rubber bladder (102) with a rubber cord composite layer structure, and a piston base (103). The main air chamber (1) has been perforated and sealed and is connected to the compression throttling pipe (2) and the tension throttling pipe (3). The main air chamber (1) is equipped with a first-stage drying layer (104), a waterproof and breathable membrane (105), a second-stage drying layer (106), and an annular protruding limiting block (107). The outer surfaces of the first-stage drying layer (104) and the second-stage drying layer (106) inside the main air chamber (1) have mounting slots and are located inside the rubber bladder (102). The annular protrusion limiting block (107) of the part is connected; a sprayer (501) is installed in the interior of the auxiliary air chamber (5) near the connection of the tension throttling tube (3); a rotary motor (502), a rotary cover plate (503) and an air chamber partition plate (504) are provided in the auxiliary air chamber (5); the two ends of the water supply pipe (6) are respectively connected to the sprayer (501) and the water storage tank (7); the output shaft of the rotary motor (502) cooperates with the rotary cover plate (503) to drive the rotary cover plate (503) to rotate; the air chamber partition plate (504) is provided with two layers to divide the auxiliary air chamber into three chambers with different volumes; the rotary cover plate (503) is tightly attached to the air chamber partition plate (504), and the opening of the throttling hole (505) on the air chamber partition plate (504) is changed by the rotation of the rotary cover plate (503) to realize the adjustment of the volume of the auxiliary air chamber (5).

2. The variable volume damping double-tube double-chamber air spring structure according to claim 1, characterized in that, The first drying layer (104) and the second drying layer (106) are made of high-density absorbent sponge.

3. The variable volume damping double-tube double-chamber air spring structure according to claim 1, characterized in that, The waterproof and breathable membrane (105) is bonded to the inner surface of the rubber bladder (102), and its structure is extensible.

4. The variable volume damping double-tube double-chamber air spring structure according to claim 1, characterized in that, The compression throttling tube (2) has a smaller diameter than the stretching throttling tube (3), and the pipeline of the compression throttling tube (2) is a serpentine curve.

5. The variable volume damping double-tube double-chamber air spring structure according to claim 1, characterized in that, The sprayer (501) sprays water mist into the auxiliary air chamber (5) only during the air spring stretching phase.

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