Air spring, vehicle body height adjusting system and vehicle body leveling method

Abstract

The invention discloses an air spring, a vehicle body height adjusting system and a vehicle body leveling method. The air spring comprises a bag skin seat used for forming a first containing cavity in an enclosing mode, a bag skin used for forming a second containing cavity in an enclosing mode and a movable part arranged in the first containing cavity, and the bag skin is connected with the bag skin seat. The movable part is in sliding sealing fit with the side wall of the bag seat and divides the first containing cavity into a first sub-cavity and a second sub-cavity. The first opening is used for communicating the first sub-cavity with the second containing cavity, the second opening is used for communicating the second sub-cavity with the outside, and the second opening is used for allowing an external pressure medium to enter and exit from the second sub-cavity so as to drive at least part of the movable part to slide, so that the volume of the first sub-cavity is reduced or increased. According to the air spring, the vehicle body height adjusting system and the vehicle body leveling method, the stability and reliability of vehicle body leveling can be improved, the vehicle is prevented from rolling and instability or rollover, and the reliability coefficient of vehicle operation is improved.

Description

Technical Field

[0001] This application belongs to the technical field of vehicle engineering, and particularly relates to an air spring, a vehicle body height adjustment system, and a vehicle body leveling method. Background Art

[0002] With the rapid development of the automotive industry, the requirements for the comfort and safety performance of vehicles are getting higher and higher. During driving, timely and efficient adjustment of the vehicle body posture can effectively reduce vehicle bumps and vibrations, thereby providing better ride comfort, driving stability, and reliability.

[0003] Currently, the method of inflating and deflating with an air pump is generally used in the market to adjust the vehicle body posture to meet the adjustment requirements of the vehicle body posture during driving. However, the method of inflating and deflating with an air pump has a slow adjustment speed. Especially when the vehicle encounters emergencies such as sharp turns or large tilts and needs to quickly adjust the vehicle body posture, it is unable to quickly adjust the vehicle body posture, so there are safety risks. Summary of the Invention

[0004] The embodiments of this application provide an air spring, a vehicle body height adjustment system, and a vehicle body leveling method, which can improve the smoothness and reliability of vehicle body leveling, prevent the vehicle from rolling over or tipping over, and improve the reliability coefficient of vehicle operation.

[0005] On the one hand, the embodiments of this application provide an air spring, including:

[0006] A bladder, enclosing to form a second accommodation cavity;

[0007] A bladder seat, enclosing to form a first accommodation cavity and connected to the bladder;

[0008] A movable member, disposed in the first accommodation cavity, the movable member is in sliding sealing cooperation with the side wall of the bladder seat and divides the first accommodation cavity into a first sub-cavity and a second sub-cavity;

[0009] The bladder seat is provided with a first opening for communicating the first sub-cavity and the second accommodation cavity and a second opening for communicating the second sub-cavity with the outside. The second opening is used for the external pressure medium to enter and exit the second sub-cavity to drive at least part of the movable member to slide, so that the volume of the first sub-cavity decreases or increases.

[0010] In a specific embodiment, the bladder seat includes a first wall located on one side of the side wall along the first direction, the first opening penetrates through the first wall, and the projection of the movable member in the first direction overlaps with the first wall; and / or,

[0011] The bladder seat includes a second wall located on one side of the side wall along the first direction. The second opening is provided through the second wall, and the projection of the movable member in the first direction overlaps with the second wall.

[0012] In a specific embodiment, the side wall includes a first part and a second part that are integrally connected. The two ends of the second part in the first direction are respectively connected to the first part and the first wall. The bladder includes a connecting portion disposed on the outer peripheral side of the second part around the first direction.

[0013] The air spring further includes a connecting member disposed on the side of the connecting portion facing away from the second part around the first direction to connect the connecting portion to the second part.

[0014] The connecting member is located inside the second accommodation cavity.

[0015] In a specific embodiment, the air spring further includes a tube body communicated with the second opening. The tube body is disposed inside the second opening, and the surface of the tube body facing the second sub-cavity is flush with the surface of the second wall facing the first wall.

[0016] In a specific embodiment, the first accommodation cavity and the first sub-cavity are configured to accommodate a gas medium, and the second sub-cavity is configured to accommodate a liquid medium.

[0017] In a specific embodiment, the gas medium includes air, and the liquid medium includes hydraulic oil.

[0018] In a specific embodiment, the movable member includes a body portion and a sealing portion. A receiving groove is recessed on the outer peripheral side of the body portion, and at least part of the sealing portion is located in the receiving groove and is in contact with the side wall.

[0019] On the other hand, an embodiment of the present application provides a vehicle body height adjustment system including a plurality of the above air springs.

[0020] In a specific embodiment, it further includes a storage member, a driving pump, a pipeline structure, and a control switch. The storage member is used to store a pressure medium. The pipeline structure includes a main pipeline structure and a plurality of branch pipeline structures. The storage member and the driving pump are both disposed on the main pipeline structure. The plurality of branch pipeline structures are connected in parallel to the main pipeline structure to form a plurality of loop structures.

[0021] Wherein, different branch pipeline structures are respectively communicated to the second openings of different air springs and are respectively provided with the control switch.

[0022] On the other hand, an embodiment of the present application provides a vehicle body leveling method, using the above-mentioned vehicle body height adjustment system, the vehicle body leveling method comprising:

[0023] Based on the inclination information of the vehicle body, determining a target air spring for adjusting the inclination information;

[0024] Controlling a target control switch corresponding to the target air spring to be turned on, so that the storage element transmits pressure medium to the target air spring through a pipeline structure;

[0025] When it is determined that the vehicle body is in a horizontal state, the target control switch is controlled to be closed.

[0026] The air spring, vehicle height adjustment system, and vehicle body leveling method of the embodiment of the present application adopt an air spring arranged at the bottom of the vehicle body. The air spring is provided with a first accommodating chamber formed by a bladder seat and a second accommodating chamber formed by a bladder seat. The two chambers are connected through a first opening, and the bladder seat is connected to an external pressure medium through a second opening. When the vehicle body posture is seriously tilted and needs to be leveled, the external pressure medium is supplied to the second sub-chamber at the lower part of the movable part through the second opening. The high-speed flowing pressure medium pushes the movable part to slide along the first direction, thereby compressing the volume of the first sub-chamber and the air inside it, thereby increasing the internal pressure of the second accommodating chamber. Under the push of high pressure, the second accommodating chamber is deformed and the volume increases, and the vehicle body is lifted, thereby achieving vehicle body leveling. When the vehicle body is adjusted, the air pressure inside the second accommodating chamber in the air spring pushes the movable part to the initial position at the bottom of the second sub-chamber, so as to facilitate the subsequent repeated leveling action.

[0027] The air spring in this application adopts a multi-stage leveling structure, and the leveling pressure can be released and increased step by step. Compared with the traditional air pump one-time pressure adjustment solution, this application has higher energy density, greater pressure, and better stability. It is especially suitable for emergency situations where the vehicle body and suspension need to be quickly adjusted to prevent the vehicle from becoming unstable or rolling over due to rollover. In addition, the air spring also has the advantages of simple structure, compact layout, easy processing, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of a vehicle in some embodiments of the present application;

[0030] Figure 2 Schematic diagram of an air spring in some embodiments of the present application;

[0031] Figure 3 Schematic diagram of the air spring in the first state in some embodiments of the present application;

[0032] Figure 4 Schematic diagram of the air spring in the second state in some embodiments of the present application;

[0033] Figure 5 Shows a schematic diagram of the vehicle body height adjustment system and the vehicle body in some embodiments of the present application under the horizontal state of the vehicle body;

[0034] Figure 6 Shows a schematic diagram of the vehicle body height adjustment system and the vehicle body in some embodiments of the present application under the initial roll state of the vehicle body;

[0035] Figure 7 Shows a schematic diagram of the vehicle body height adjustment system and the vehicle body in some embodiments of the present application under the initial leveling state of the vehicle body;

[0036] Figure 8 Shows a schematic diagram of the vehicle body height adjustment system and the vehicle body in some embodiments of the present application after the vehicle body leveling is completed under the vehicle body leveling state;

[0037] Figure 9 Shows a schematic diagram of the vehicle body height adjustment system and the vehicle body in some embodiments of the present application after the vehicle body leveling is completed;

[0038] Figure 10 Flow chart of the vehicle body leveling method in some embodiments of the present application.

[0039] The reference numerals in the accompanying drawings are as follows:

[0040] 1000, vehicle;

[0041] 100, vehicle body; 200, suspension; 300, air spring;

[0042] 10, bladder seat; 20, bladder; 30, movable part; 40, tilt detection module; 50, leveling drive device; 60, control component; 70, connecting piece; 80, connecting end cap;

[0043] 11, first accommodation cavity; 111, first sub-cavity; 112, second sub-cavity; 12, first opening; 13, second opening; 14, pipe body; 15, outer step surface; 101, side wall; 102, first wall; 103, second wall; 1011, first part; 1012, second part; 201, connecting part; 202, flexible part;

[0044] 21, second accommodation cavity; 22, inner step surface;

[0045] 31. Body part; 32. Sealing part; 311. Accommodating groove;

[0046] 51. Storage part; 52. Driving pump; 53. Pipeline structure; 54. Control switch; 531. Main pipeline structure; 532. Branch pipeline structure; 5321. First branch; 5322. Second branch; 541. First switch; 542. Second switch;

[0047] X. First direction; Y. Second direction; Z. Third direction; M. Central cross-section; N. Central longitudinal section; A. Detection reference plane. Detailed implementation mode

[0048] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present application more clearly, so they are only examples and cannot

[0049] be used to limit the protection scope of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise specifically defined.

[0052] Referring to "embodiment" herein means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0054] In the description of the embodiments of the present application, the term "plural" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0055] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top"

[0056] "Bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present application.

[0057] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0058] The applicant has noticed that the air pump inflation and deflation method is generally used in the market to adjust the vehicle body level. When the vehicle is in an emergency state and a rapid adjustment of the suspension posture is required, the traditional air pump inflation and deflation method cannot meet the requirements.

[0059] In view of this, in order to achieve that when the vehicle posture is severely tilted, the air pressure inside the air spring can be increased stably and reliably, and the vehicle can be lifted on one side, thereby reducing the risk of instability or rollover of the vehicle due to roll, the applicant has conducted in-depth research and designed an air spring applied to a vehicle. It adopts a multi-stage supercharging structure and realizes the lifting of the vehicle body after staged supercharging, with better stability. On the premise of meeting stability,

[0060] The supercharging intensity is greater, the response is faster and more agile, and the adjustment is more efficient.

[0061] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the vehicle 1000 in some embodiments of the present application.

[0062] In the embodiments of the present application, the vehicle 1000 can be a fuel vehicle, a gas vehicle, or an electric vehicle, and the electric vehicle can be a pure electric vehicle, a hybrid electric vehicle, an extended-range electric vehicle, etc. The vehicle 1000 is provided with an air spring 300, and the air spring 300 can be arranged at the bottom, side, head, or tail of the vehicle 1000. The air spring 300 can be used to level the vehicle so that it remains generally horizontal relative to the driving road surface.

[0063] Please refer to Figures 2 to 4 。 Figure 2 is a schematic diagram of the air spring in some embodiments of the present application; Figure 3 is a schematic diagram of the air spring in the first state in some embodiments of the present application; Figure 4 is a schematic diagram of the air spring in the second state in some embodiments of the present application.

[0064] The embodiments of the present application provide an air spring 300, which includes a bladder seat 10 for enclosing to form a first accommodation cavity 11, a bladder 20 for enclosing to form a second accommodation cavity 21, and a movable member 30 disposed inside the first accommodation cavity 11. The bladder 20 is connected to the bladder seat 10. The movable member 30 is slidably and sealingly engaged with the side wall 101 of the bladder seat 10 and divides the first accommodation cavity 11 into a first sub-cavity 111 and a second sub-cavity 112. The bladder seat 10 is provided with a first opening 12 for communicating the first sub-cavity 111 and the second accommodation cavity 21, and a second opening 13 for communicating the second sub-cavity 112 with the outside. The second opening 13 is used for the external pressure medium to enter and exit the second sub-cavity 112, so as to drive at least part of the movable member 30 to slide, so that the volume of the first sub-cavity 111 decreases or increases.

[0065] The air spring 300 provided in the embodiments of the present application can be applied to an automotive suspension system to adjust the height of the vehicle body 100 and the stiffness of the suspension 200, and improve the ride comfort and the passing performance of the vehicle 1000. Alternatively, the air spring 300 can also be used in the industrial field for shock absorption and vibration isolation of mechanical equipment to protect the equipment and reduce wear. Alternatively, the air spring 300 can also be applied in the aerospace field for aircraft landing gear shock absorption and in-cabin seat adjustment. For the convenience of describing the advantages and effects of the air spring 300 in the embodiments of the present application, the following will be described by taking the air spring 300 used in an automotive suspension system as an example.

[0066] Specifically, the air spring 300 includes a bladder 20 for forming a second accommodation chamber 21, and the second accommodation chamber 21 is used to accommodate a gas medium inside. After the second accommodation chamber 21 is filled with the gas medium, the gas medium forms a certain degree of expansion force on the bladder 20. When an external load acts on the bladder 20, the bladder 20 compresses the gas inside it, and then generates a certain elastic force to react against the external load, so as to reduce the influence of the external load on the bladder 20. When the external load disappears, under the action of the gas medium inside the bladder 20, the bladder 20 returns to its initial state. Exemplarily, the bladder 20 may include an elastic member, such as a rubber elastic member or a silica gel elastic member.

[0067] Furthermore, in the embodiment of the present application, in order to improve the recovery rate of the bladder 20 after the action of an external load and improve the reaction degree of the air spring 300 against the external load, the air spring 300 provided in the embodiment of the present application further includes a bladder seat 10 for enclosing and forming a first accommodation chamber 11 and a movable member 30 disposed inside the first accommodation chamber 11. The movable member 30 divides the first accommodation chamber 11 into a non-communicating first sub-chamber 111 and second sub-chamber 112. At the same time, the first sub-chamber 111 communicates with the second accommodation chamber 21 through a first opening 12, and the second sub-chamber 112 communicates with an external pressure medium through a second opening 13.

[0068] The first sub-chamber 111 and the second accommodation chamber 21 communicate with each other, and the gas medium inside the second accommodation chamber 21 can flow into the first sub-chamber 111 through the first opening 12, and at the same time, it can also flow back to the second accommodation chamber 21 through the first opening 12. When there is a pressure difference between the first sub-chamber 111 and the second sub-chamber 112, at least a part of the movable member 30 slides inside the first accommodation chamber 11 under the action of this pressure difference. When the movable member 30 slides inside the first accommodation chamber 11, the sum of the volumes of the first sub-chamber 111 and the second sub-chamber 112 is a fixed value, and the sum of the volumes of the first sub-chamber 111 and the second sub-chamber 112 is always the volume of the first accommodation chamber 11 enclosed by the bladder seat 10.

[0069] Optionally, for the sliding of the movable member 30 inside the first accommodating cavity 11, a part of the movable member 30 is fixedly connected to the side wall of the first accommodating cavity 11, and a part of the movable member 30 can slide relative to the side wall of the first accommodating cavity 11 to change the volume of the first sub-cavity 111. Alternatively, the movable member 30 is slidably disposed relative to the first accommodating cavity 11 as a whole, and all structures of the movable member 30 slide inside the first accommodating cavity 11 to change the volume of the first sub-cavity 111. It should be noted that whether a part of the structure of the movable member 30 slides relative to the side wall of the first accommodating cavity 11 or all structures slide relative to the side wall of the first accommodating cavity 11, the peripheral side of the movable member 30 should be in sealed contact with the side wall of the first accommodating cavity 11 to ensure that the first accommodating cavity 11 is divided into a non-communicating first sub-cavity 111 and a second sub-cavity 112.

[0070] The air spring 300 includes a first state and a second state. In the first state, the movable member 30 is in the first position, and the movable member 30 is at one end of the first accommodating cavity 11 close to the second opening 13. In the second state, the movable member 30 is in the second position, and the movable member 30 is at one end of the first accommodating cavity 11 close to the first opening 12.

[0071] The air spring 300 is in the first state, the movable member 30 is at one end of the first accommodating cavity 11 close to the second opening 13. The volume of the first accommodating cavity 11 is the largest, the volume of the second accommodating cavity 21 is the smallest, the volume of the first sub-cavity 111 inside the first accommodating cavity 11 is larger than the volume of the second sub-cavity 112, and the gas medium is filled in the first sub-cavity 111 and the second accommodating cavity 21. When the air spring 300 is subjected to an external load, the bladder 20 is compressed to a certain extent.

[0072] When the external load on the air spring 300 suddenly increases, during the process of the bladder 20 reacting against the external load, the external pressure medium participates in the process of the bladder 20 reacting against the external load. Under the action of the external pressure medium, the pressure inside the second sub-cavity 112 increases. When the pressure inside the second sub-cavity 112 is greater than the pressure inside the first sub-cavity 111, it drives the movable member 30 to slide from the first position to the second position. During the sliding process of the movable member 30, the volume of the second sub-cavity 112 increases, and the volume of the first sub-cavity 111 decreases. In the embodiment of the present application, the movable member 30 can slide along the first direction X to the second position. When the sliding member is in the second position, the volume of the first sub-cavity 111 is the smallest, and the volume of the second sub-cavity 112 is the largest.

[0073] Correspondingly, during the process in which the bladder 20 reacts to an external load, the gas medium inside the bladder 20 within the second accommodation chamber 21 itself undergoes a certain degree of reaction. In combination with the sliding of the movable member 30, the volume of the first sub-chamber 111 is compressed, causing the gas medium inside the first sub-chamber 111 to flow into the second accommodation chamber 21 through the first opening 12, thereby increasing the gas medium capacity inside the second accommodation chamber 21. Furthermore, the force exerted by the gas medium inside the second accommodation chamber 21 on the bladder 20 is increased to overcome the effect of the external load acting on the bladder 20, so that the bladder 20 reacts to the external load to a greater extent. Through the provision of the bladder seat 10 and the movable member 30, during the process in which the bladder 20 reacts to an external load, the gas medium capacity inside the second accommodation chamber 21 can be increased by compressing the volume of the first sub-chamber 111, and furthermore, the force exerted by the gas medium inside the second accommodation chamber 21 on the bladder 20 can be increased to overcome the action of the external load on the bladder 20.

[0074] When the external load decreases or disappears, correspondingly, the external pressure medium also decreases or disappears, and the pressure inside the second sub-chamber 112 decreases. When the pressure inside the second sub-chamber 112 is less than the pressure inside the first sub-chamber 111, the movable member 30 slides to the first position, causing the air spring 300 to return to its initial state.

[0075] The bladder seat 10 and the movable member 30 are preferably made of a rigid material so that it is not easy for the bladder seat 10 and the movable member 30 to deform, ensuring a sealed contact between the movable member 30 and the side wall 101 of the bladder seat 10. Exemplarily, the bladder seat 10 and the movable member 30 can be prepared from rigid materials such as plastics, steel, alloys, etc. The first accommodation chamber 11 is preferably set as a chamber with a constant cross-section to facilitate ensuring that the movable member 30 can be in sealed contact with the side wall 101 of the bladder seat 10 when sliding inside the first accommodation chamber 11.

[0076] In summary, in the embodiment of the present application, the air spring 300 includes a bladder 20 for forming a second accommodation chamber 21, and the second accommodation chamber 21 is used to accommodate a gas medium inside. After the gas medium is filled inside the second accommodation chamber 21, the gas medium forms a certain degree of supporting force and expansion force on the bladder 20. When an external load acts on the bladder 20, the bladder 20 compresses the gas inside it, and then generates a certain elastic force to react against the external load to reduce the influence of the external load on the bladder 20. Further, the air spring 300 further includes a bladder seat 10 for enclosing and forming a first accommodation chamber 11 and a movable member 30 disposed inside the first accommodation chamber 11, and the movable member 30 divides the inside of the first accommodation chamber 11 into a non-communicating first sub-chamber 111 and a second sub-chamber 112. The first sub-chamber 111 communicates with the second accommodation chamber 21 through a first opening 12, and the second sub-chamber 112 communicates with an external pressure medium through a second opening 13. The external pressure medium is used to drive the movable member 30 to slide inside the first accommodation chamber 11, so as to improve the recovery rate of the bladder 20 after being acted upon by an external load and improve the reaction degree of the air spring 300 to the external load.

[0077] In some embodiments, the bladder seat 10 includes a first wall 102 located on one side of the side wall 101 along the first direction X, the first opening 12 is disposed through the first wall 102, and the projection of the movable member 30 in the first direction X overlaps with the first wall 102. And / or, the bladder seat 10 includes a second wall 103 located on one side of the side wall 101 along the first direction X, the second opening 13 is disposed through the second wall 103, and the projection of the movable member 30 in the first direction X overlaps with the second wall 103.

[0078] During the sliding process of the movable member 30 along the first direction X, a sealed contact is always maintained between the movable member 30 and the side wall 101. The first wall 102 is disposed on one side of the side wall 101 along the first direction X, and the projection of the movable member 30 in the first direction X overlaps with the first wall 102, which can use the setting of the first wall 102 to limit the sliding of the movable member 30 in the first direction X to improve the stability of the sliding of the movable member 30 inside the first accommodation chamber 11. Further, setting the first opening 12 on the first wall 102 can avoid the influence of the first opening 12 on the side wall 101 to ensure the sliding of the movable member 30 relative to the side wall 101. The setting method and beneficial effects of the second wall 103 are similar to those of the first wall 102 and will not be elaborated here.

[0079] Further, the bladder 20 is connected to one side of the bladder seat 10 along the first direction X. The second accommodation cavity 21 inside the bladder 20 communicates with the first sub-cavity 111 inside the bladder seat 10 through the first opening 12 on the first wall 102. Through the above arrangement, the gas inside the first sub-cavity 111 and the second accommodation cavity 21 can flow smoothly along the first direction X through the first opening 12 during the flow process, improving the gas flow rate, and thus improving the recovery rate of the bladder 20 after being acted upon by an external load.

[0080] Optionally, the projections of the second opening 13, the first opening 12, and the second accommodation cavity 21 in the first direction X overlap, so as to facilitate the smooth transmission of pressure along the first direction X. Further, the projection of the second opening 13 in the first direction X is located inside the projection of the first opening 12 in the first direction X, and the projection of the first opening 12 in the first direction X is located inside the projection of the second accommodation cavity 21 in the first direction X.

[0081] In some embodiments, the second accommodation cavity 21 and the first sub-cavity 111 are configured to accommodate a gas medium, and the second sub-cavity 112 is configured to accommodate a liquid medium. The external pressure medium is a liquid medium. During the transition of the air spring 300 from the first state to the second state, the liquid medium enters the second sub-cavity 112, and the liquid medium drives the movable member 30 to slide from the first position to the second position. By flowing the liquid medium into the second sub-cavity 112 and contacting the movable member 30 to drive the movable member 30 to slide, compared with directly connecting the movable member 30 to a fixed rod to drive the slide, a relatively gentle transmission force can be formed on the movable member 30 during the stable driving of the movable member 30 to slide, reducing the damage to the movable member 30 and the bladder seat 10.

[0082] In some embodiments, the gas medium includes air, and the liquid medium includes hydraulic oil. Air is filled inside the second accommodation cavity 21 and the first sub-cavity 111, and hydraulic oil is filled in the second sub-cavity 112. The movable member 30 separates the air and the hydraulic oil. During the transition of the air spring 300 from the first state to the second state, the hydraulic oil enters the second sub-cavity 112 and exerts a certain effect on the movable member 30, causing the movable member 30 to slide. During the sliding of the movable member 30 from the first position to the second position, the volume inside the first sub-cavity 111 decreases, and the air flows from the first sub-cavity 111 to the inside of the second accommodation cavity 21 and exerts a certain force on the bladder 20, thereby overcoming the action of the external load on the bladder 20. As a common gas, air has a low cost. Using air as the gas medium filled inside the second accommodation cavity 21 and the first sub-cavity 111 can reduce the manufacturing cost of the air spring 300. Using hydraulic oil as the liquid medium filled in the second sub-cavity 112 can provide good liquid pressure to ensure the driving effect on the movable member 30.

[0083] In some embodiments, the air spring 300 further includes a tube body 14 communicating with the second opening 13. The tube body 14 is disposed inside the second opening 13, and the surface of the tube body 14 facing the second subchamber 112 is flush with the surface of the second wall 103 facing the first wall 102.

[0084] In order to ensure that the liquid medium can flow smoothly and stably into the second subchamber 112, a tube body 14 is provided at the second opening 13 of the bladder seat 10. The tube body 14 is disposed inside the second opening 13, so that when the liquid medium flows into the second accommodating cavity 21 from the inside of the tube body 14, it can directly enter the second accommodating cavity 21, reducing the impact of the liquid medium on the connection position between the tube body 14 and the bladder seat 10, and reducing the influence of the liquid medium on the connection stability between the tube body 14 and the bladder seat 10.

[0085] At the same time, considering the sliding of the moving member 30 in the first direction X, the surface of the tube body 14 facing the second subchamber 112 does not protrude from the surface of the second wall 103 facing the first wall 102, so as to reduce the influence of the tube body 14 on the sliding of the moving member 30. Taking into account the above two aspects, the surface of the tube body 14 facing the second subchamber 112 is set to be flush with the surface of the second wall 103 facing the first wall 102.

[0086] In some embodiments, the side wall 101 includes a first part 1011 and a second part 1012 integrally connected. The two ends of the second part 1012 in the first direction X are respectively connected to the first part 1011 and the first wall 102, and the wall thickness of the first part 1011 is greater than the wall thickness of the second part 1012. Wherein, the inner surface of the second part 1012 is flush with the inner surface of the first part 1011, and the outer surface of the second part 1012 is recessed relative to the outer surface of the first part 1011.

[0087] During the sliding process of the moving member 30 inside the bladder seat 10, the first accommodating cavity 11 is divided into a first subchamber 111 and a second subchamber 112. The first subchamber 111 is configured to accommodate a gas medium, and the second subchamber 112 is configured to accommodate a liquid medium. Correspondingly, the first part 1011 of the side wall 101 is located on the side facing the second wall 103, and the second part 1012 of the side wall 101 is located on the side facing the first wall 102. When the liquid medium is inside the second subchamber 112, it is preferentially surrounded by the first part 1011. When the gas medium is inside the first subchamber 111, it is preferentially surrounded by the second part 1012. Thickening the wall thickness of the first part 1011 enables the first part 1011 to withstand a relatively large internal pressure, that is, the internal pressure brought by the liquid medium, so as to ensure the smooth operation of the bladder seat 10.

[0088] Furthermore, in order not to affect the smooth sliding of the movable member 30 inside the bladder seat 10 and the smooth flow of the pressure medium inside the bladder seat 10, the inner surface of the second part 1012 is set flush with the inner surface of the first part 1011, so that the movable member 30 can slide smoothly between the first part 1011 and the second part 1012.

[0089] Furthermore, the thickness dimension of the movable member 30 along the first direction X is set to be greater than the dimension of the second part 1012 along the first direction X. Through the above settings, on the one hand, the movable member 30 has a certain thickness dimension and can withstand a relatively large pressure. On the other hand, when the movable member 30 abuts against the first wall 102, the side surface of the movable member 30 facing away from the first wall 102 is located on the side of the second part 1012 facing away from the first wall 102 and towards the first part 1011. The liquid medium is still surrounded and accommodated by the relatively thick first part 1011 to avoid contact between the relatively thin second part 1012 and the liquid medium, so that the bladder seat 10 operates smoothly.

[0090] In some embodiments, the bladder 20 includes a connecting portion 201 disposed on the outer peripheral side of the second part 1012 along the first direction X. The air spring 300 includes a connecting member 70, and the connecting member 70 is disposed along the first direction X and connected to the side facing away from the second part 1012 to connect the connecting portion 201 to the second part 1012. The connecting member 70 is located inside the second accommodation chamber 21.

[0091] The thickness difference between the first part 1011 and the second part 1012 forms an inner stepped surface 22 at the connection position between the first part 1011 and the second part 1012, and the bladder 20 is connected to the inner stepped surface 22. The connecting member 70 surrounds the side of the connecting portion 201 facing away from the second part 1012, and the connecting member 70 exerts a force on the surface of the connecting portion 201 facing away from the second part 1012, so that the connecting portion 201 fits against the second part 1012 to ensure the connection between the bladder 20 and the bladder seat 10.

[0092] During the operation of the air spring 300, the pressure in the second accommodation chamber 21 inside the bladder 20 may change, which may affect the connection between the connecting portion 201 and the second part 1012. In order to reduce the influence of the pressure change inside the bladder 20 on the connection strength between the connecting portion 201 and the second part 1012, the connecting member 70 is disposed inside the second accommodation chamber 21.

[0093] Under normal circumstances, the connecting member 70 contacts the surface of the connecting portion 201 facing away from the second portion 1012, so that the connecting portion 201 is pressed against the second portion 1012. The connecting member 70 is disposed inside the second receiving cavity 21, which is equivalent to the gas medium inside the second receiving cavity 21 being on the side of the connecting member 70 facing away from the connecting portion 201. The connecting member 70 receives the gas pressure generated by the gas medium inside the second receiving cavity 21 and can further fit against the connecting portion 201, thereby further improving the connection strength between the connecting portion 201 and the second portion 1012.

[0094] In some embodiments, the bladder 20 further includes a flexible portion 202 integrally connected to the connecting portion 201. A part of the flexible portion 202 abuts against the first portion 1011, and the surface of the connecting portion 201 away from the second portion 1012 is located on the side of the surface of the flexible portion 202 away from the first portion 1011 facing the first receiving cavity 11.

[0095] When the gas pressure inside the second receiving cavity 21 changes, the flexible portion 202 undergoes a certain degree of tensile deformation, and the volume of the gas inside the flexible portion 202 changes. Since a part of the flexible portion 202 abuts against the first portion 1011, this part will unfold or fold along the surface of the first portion 1011 to guide the deformation of the flexible portion 202 to a certain extent. The gas medium generates a certain flow effect along the inner surface of the bladder 20. Setting the surface of the connecting portion 201 away from the second portion 1012 on the side of the surface of the flexible portion 202 away from the first portion 1011 facing the first receiving cavity 11 can reduce the influence of the gas medium on the connecting member 70 when flowing along the surface of the flexible portion 202, so as to ensure the connection stability between the connecting portion 201 and the second portion 1012.

[0096] In some embodiments, the movable member 30 includes a body portion 31 and a sealing portion 32. A receiving groove 311 is formed by recessing the outer peripheral side of the body portion 31, and the sealing portion 32 is at least partially located in the receiving groove 311 and is in contact with the side wall 101.

[0097] In this embodiment, the pushing surface of the body portion 31 facing the first opening 12 can be, but is not limited to, a plane, an inclined plane, or a protrusion facing the first opening 12. When a protrusion structure is adopted, the protrusion can be larger than the size of the first opening 12, or at least partially adapted to the first opening 12. The acting surface of the body portion 31 facing the second opening 13 can be, but is not limited to, a plane or an inclined plane. Compared with the piston link structure driven by gas on the market, the first receiving cavities 11 located on both sides of the movable member 30 separated by the movable member 30 in the embodiment of the present application can accommodate two different types of pressure media, so that the pressure coefficients on both sides can be adjusted, and combined pressure regulation can be performed. Multiple adjustment requirements can be set for different vehicle models, the adjustment range is larger, and the adjustment is more efficient.

[0098] The sealing portion 32 on the outer periphery of the movable member 30 may include a sealing groove, which may be provided at one, two or more places. A sealing ring is provided in each sealing groove, and the movable member 30 is hermetically connected to the second accommodation cavity 21 through the sealing ring to prevent pressure leakage during sliding.

[0099] In addition, the present application also provides a vehicle body height adjustment system, which includes a plurality of the above-mentioned air springs 300 and a vehicle body 100 connected to the plurality of above-mentioned air springs at the same time. The vehicle body 100 is connected to the side of the bladder 20 away from the bladder seat 10 along the first direction.

[0100] Combined Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 。A connection end cover 80 is provided at one end of the bladder 20 facing away from the bladder seat 10. The connection end cover 80 is located at the top of the entire air spring 300, and one end of the bladder seat 10 facing away from the bladder 20 is located at the bottom of the entire air spring 300. The connection end cover 80 located at the top of the air spring 300 is fixedly connected to the vehicle body 100 through a fastener, and the bottom of the air spring 300 is connected to the suspension 200 through a fastener. Thus, the air spring 300 forms a substantially vertically distributed structure along the first direction X, so as to quickly and accurately respond to the adjustment requirements of the posture of the vehicle body 100.

[0101] During the smooth driving or stationary process of the vehicle, the plurality of air springs 300 support the vehicle body 100, and the supporting force of the air springs 300 on the vehicle body 100 is balanced with the gravity of the vehicle body 100, and the vehicle body 100 has a certain flatness. The air spring 300 is used as a part of the suspension 200 and is used to connect the vehicle body 100 and the axle. When the vehicle is turning, due to the moving inertia of the vehicle body 100 and the action of the turning centrifugal force, the vehicle body 100 tilts to a certain extent, which will squeeze the air spring 300 on the outer side of the turn and relax the air spring 300 on the inner side of the turn. After the turn is completed, the vehicle body 100 gradually returns to the flat state under the action of the air spring 300, and the supporting force of the air spring 300 on the vehicle body 100 is rebalanced with the gravity of the vehicle body 100, and the vehicle continues to drive smoothly. However, if the turning angle of the vehicle is too large, the vehicle body 100 will tilt to a large extent. The vehicle body height adjustment system provided by the embodiment of the present application can quickly adjust the tilted vehicle body 100 based on the air spring 300 provided by the embodiment of the present application, and reduce the probability of danger due to excessive tilting of the vehicle body 100.

[0102] Since the air spring 300 has a certain elastic variable, and the chamber inside the air spring 300 is a cavity with a variable volume. During vehicle driving, relying on the elastic deformation performance of the air spring 300, stretching or compression can be achieved to a certain extent, and the volume of the chamber 301 inside the air spring 300 changes. Thus, during vehicle driving, the position of the vehicle body 100 can be dynamically adjusted, the vehicle body 100 can float, and during the adjustment process of the vehicle body 100, the vehicle body 100 can be lifted relying on the elastic deformation performance of the air spring 300.

[0103] The vehicle body height adjustment system provided by the embodiment of the present application has the above-mentioned air spring 300, can quickly and accurately adjust the vehicle body 100 to a horizontal attitude, can quickly and accurately adjust the attitude of one side of the vehicle body 100 to horizontal, has a simple structure, a compact layout, is arranged at the bottom of the vehicle body 100, does not occupy the internal space of the vehicle, and is sensitive in response, accurate in adjustment, and high in reliability.

[0104] Furthermore, a plurality of air springs 300 are respectively arranged at intervals side by side in the second direction Y and the third direction Z, and the first direction X, the second direction Y, and the third direction Z intersect pairwise. Among them, at least part of the air springs 300 are symmetrically arranged relative to the vehicle body 100 in the second direction Y; and / or, at least part of the air springs 300 are symmetrically arranged relative to the vehicle body 100 in the third direction Z.

[0105] Combined with Figure 1 and Figure 2 . The first direction X, the second direction Y, and the third direction Z can be respectively the height direction (i.e., the X direction), the length direction (i.e., the Y direction), and the width direction (i.e., the Z direction) of the vehicle body 100 shown in the figure.

[0106] In order to achieve the leveling of different parts of the vehicle body 100, the number of air springs 300 can be set to multiple according to actual needs, and the installation positions of the air springs 300 can be arranged in an array, such as a rectangular array, a circular array, a polygonal array arrangement, etc., can also be arranged in a grid, or irregularly distributed, or combinedly distributed.

[0107] Optionally, the air springs 300 are arranged in a rectangular array. In order to ensure the leveling accuracy, part of the air springs 300 can be symmetrically arranged along the second direction Y and relative to the central cross-section M of the vehicle body (such as Figure 1 the M cross-section in Figures 5 to 9 ), and part of the air springs 300 can be symmetrically arranged along the third direction Z and relative to the central longitudinal section N of the vehicle body (such as Figures 5 to 9 the N cross-section in Figures 5 to 9 ). Thus, the vehicle body 100 can be symmetrically lifted and leveled, improving the accuracy and stability of the lifting and leveling.

[0108] Regarding the number and position of the air springs 300, in an alternative embodiment, the air springs 300 are provided in two groups of four, symmetrically distributed in pairs with respect to the central cross-section M and the central longitudinal section N. The air springs 300 are disposed between the vehicle body and the suspension, that is, the tops of the two air springs 300 in the first group are fixedly connected to the vehicle body 100, and their bottoms are fixedly connected to the front axle. The tops of the two air springs 300 in the second group are fixedly connected to the vehicle body 100, and their bottoms are fixedly connected to the rear axle.

[0109] With such an arrangement, the vehicle body structure can be reasonably utilized, and there is no need to provide additional installation space for the air springs 300. They can be directly installed between the vehicle body and the axle through fasteners, which is more convenient for installation and more cost-saving.

[0110] In addition, the air springs 300 can also be provided in three groups of six, that is, an additional group of two is added in the middle position of the vehicle body 100 to achieve leveling of the middle area of the vehicle body 100. The specific number and distribution position of the air springs 300 can be set according to actual requirements and are not limited in this article.

[0111] Regarding the driving method of the air springs 300 in this application, a non-contact driving scheme can be adopted, such as pneumatic or hydraulic, and a direct-contact driving scheme can also be adopted. When a contact driving structure is adopted, the air springs 300 can include linear driving structures such as pneumatic push rods and hydraulic push rods, which are connected to the air springs 300 through connectors, and the air springs 300 apply linear driving forces. In addition, an electric driving method can also be adopted, such as motor driving.

[0112] When a pneumatic or hydraulic structure is adopted, the second opening 13 at the bottom of the second accommodation chamber 21 is connected to an external ventilation source or liquid source through a pipe body 14 to realize the supply of the pressure source. The leveling driving method will be described below in terms of the hydraulic method.

[0113] The vehicle body height adjustment system in this application further includes a storage member 51, a driving pump 52, a pipeline structure 53, and a control switch 54. The storage member 51 is used for storing a pressure medium. The pipeline structure 53 includes a main pipeline structure 531 and a plurality of branch pipeline structures 532. The storage member 51 and the driving pump are both arranged on the main pipeline structure 531, and the plurality of branch pipeline structures 532 are connected in parallel to the main pipeline structure 531 to form a plurality of loop structures; among them, the number of air springs 300 is multiple, and different branch pipeline structures 532 are respectively connected to the second openings 13 of different air springs 300 and are respectively provided with control switches 54.

[0114] The storage member 51 is communicated with each air spring 300 through the main path structure 531 and each branch path structure 532 to form a liquid supply loop, so as to form a centralized liquid supply structure. A liquid is disposed in the storage member 51. The driving pump 52 is communicated with the storage member 51 through the main path. The driving pump 52 can supply the liquid in the storage member 51 into the second accommodation cavity 21 of the air spring 300. The control switches 54 between each pressure regulating member and the driving pump 52 and between the storage member 51 and the pressure regulating member can be valve bodies, such as solenoid valves and / or regulating valves. The valve body is communicatively connected with an external control system.

[0115] In the normal driving state of the vehicle, the control switch 54 between the second opening 13 and the storage member 51 is in an open state, and the control switch 54 between the second opening 13 and the driving pump 52 is in a closed state. At this time, due to the air pressure in the air spring 300, the liquid in the second accommodation cavity 21 is pressed back into the storage member 51, as Figure 5 shown.

[0116] When the vehicle body 100 rolls, when the control component 60 determines through the height signal that the system needs to work, the driving pump 52 starts to work. At the same time, the states of the two control switches 54 connected to the air spring 300 to be lifted are switched. The state of the control switch 54 connected to the driving pump 52 is switched from closed to open, and the state of the control switch 54 connected to the storage member 51 is switched from open to closed. Liquid is injected into the compressed air spring 300 to push the sliding movable member 30 to compress the gas in the second accommodation cavity 21, so as to increase the internal pressure of the air spring 300 and realize the lifting of the vehicle 1000, as Figure 6 and Figure 7 shown.

[0117] When the vehicle 1000 returns to the normal driving state, the driving pump 52 stops working. At the same time, the states of the two control switches 54 connected to the lifted air spring 300 are switched. The liquid pressure medium inside the air spring 300 is pushed back into the storage member 51 by the air pressure, and the movable member 30 is reset, as Figure 8 and Figure 9 shown.

[0118] Therefore, in the embodiment of the present application, the storage member 51 and the driving pump 52 are arranged on the main path. Only one storage member 51 and one driving pump 52 are needed to supply liquid to all the air springs 300, which saves space. Each air spring 300 is connected in parallel through its respective branch path structure 532, and each branch path structure 532 is controlled by a control switch 54 to independently control the liquid supply to each air spring. Thus, space can be saved and it is more efficient.

[0119] In a specific embodiment, the branch structure 532 includes a first branch 5321 communicating with the outlet end of the driving pump 52 and the second opening 13, and a second branch 5322 communicating with the inlet end of the storage member 51 and the second opening 13; the control switch 54 includes a first switch 541 disposed on the first branch 5321 and a second switch 542 disposed on the second branch 5322, and the first switch 541 and the second switch 542 are driven independently of each other. In addition, a pipeline structure is included, and the pipeline structure communicates with the second opening to convey a liquid medium to the first accommodating cavity.

[0120] The second opening 13 of the air spring is respectively connected to the first branch 5321 and the second branch 5322 through the first main path. The first branch 5321 is connected to the outlet end of the storage member 51, the second branch 5322 is connected to the outlet end of the driving pump 52, and switches are disposed on both the first branch 5321 and the second branch 5322 to control the liquid supply flow rate.

[0121] Based on the above embodiments of the present application, an inclination detection module 40 can be provided at a position of the vehicle body 100 corresponding to each air spring 300. The inclination detection module 40 detects the inclination information of the vehicle body, and the inclination detection module 40 is connected to an external control system. The control system adjusts the vehicle body posture based on the detection result of the vehicle body inclination state by the inclination detection module 40.

[0122] Specifically, the inclination detection module 40 can be fixedly connected between the vehicle body 100 and the suspension 200. The inclination detection module 40 is used to detect the inclination information of the vehicle body 100 corresponding to each air spring 300. The inclination information can be the height information of the connection position of the air spring 300 corresponding to the vehicle body 100, or the inclination angle information of the vehicle body 100 relative to the horizontal reference plane. Taking the inclination detection module 40 detecting the height information of the vehicle body 100 as an example, the vehicle body 100 leveling control process will be described below.

[0123] The inclination detection module 40 is used to detect the height value of the connection part of the vehicle body 100 corresponding to each air spring 300 from the detection reference plane A, and transmit the height value to the control component 60. When the control component 60 detects that the vehicle body 100 is inclined, the control component 60 controls the leveling drive device 50 to provide a driving force to the movable member 30 in the air spring 300 on the inclined side according to the calculated lifting height value, so that the movable member 30 compresses the gas in the chamber 301 to lift the vehicle body 100 to a horizontal state; the control component 60 controls the leveling drive device 50 to drive the movable member 30 to reset.

[0124] That is to say, the inclination detection module 40 is used to detect the height value from the distance detection reference plane, so that the height of the vehicle body 100 at the position where each air spring 300 is located can be measured. The inclination detection module 40 is communicatively connected to an external control component 60, and the measured height value is transmitted to the control component 60 in real time. The control component 60 obtains the height values corresponding to the respective air springs 300, thereby measuring the inclination position and inclination height of the vehicle body 100, and then controlling the inclination part of the vehicle body 100 to achieve lifting.

[0125] In order to improve the accuracy of the vehicle body 100 height detection, the number of inclination detection modules 40 can be set according to the number of air springs 300 so that the two numbers are equal, and each air spring 300 is matched with an inclination detection module 40 to achieve targeted detection of the height at the location of each air spring 300.

[0126] Specifically, when four air springs 300 are arranged on the vehicle body 100, four vehicle body height detection modules are correspondingly arranged for the inclination detection module 40, and each vehicle body height detection module is respectively arranged corresponding to and at the same height as each air spring 300. When detecting the height of the vehicle body 100, the inclination detection module 40 independently detects the position height of the air spring 300, so as to accurately obtain the height data of the detection position of the vehicle body 100 and ensure the accuracy of the leveling result.

[0127] Furthermore, in order to ensure the accuracy of the height value detection, in a specific embodiment, two air springs 300 in the same group are horizontally distributed. Optionally, the two air springs 300 in the same group are symmetrically distributed with respect to the central longitudinal section N of the vehicle body 100. That is, the two air springs 300 in the first group arranged on the front side of the vehicle body 100 are symmetrically distributed with respect to the central longitudinal section N of the vehicle body 100. Further, the two air springs 300 in the second group arranged on the rear side of the vehicle body 100 are symmetrically distributed with respect to the central longitudinal section N of the vehicle body 100, so that the height information of the symmetric positions of the vehicle body 100 can be obtained, and the height detection requirements of the vehicle body 100 in the four directions of front, rear, left, and right can be met, ensuring the accuracy of the adjustment. In addition, a group of two air springs 300 can also be arranged in the middle of the vehicle body 100. Correspondingly, an inclination detection module 40 is arranged for each air spring 300 to meet the height detection requirements of the middle position.

[0128] Therefore, the vehicle body height adjustment system provided by the embodiments of the present application adopts an air spring 300 with adjustable volume. The cavity inside the air spring 300 is separated by a movable part 30. Liquid is injected into the liquid cavity part through an external hydraulic source to change the volume inside the air spring 300, quickly adjust the air pressure inside the air spring 300, and then dynamically control the vehicle attitude. When the vehicle has an excessive roll state, by controlling the hydraulic source to quickly inject liquid into the air spring 300, the support of the air spring 300 can be increased and lifting can be achieved, thereby suppressing the roll of the vehicle. At the same time, when the adjustable air spring 300 does not need to work, by controlling the pressure of the external hydraulic source, the movable part 30 is pressed back to its original position based on the internal pressure of the air spring 300, thereby restoring the leveling system state to the initial state.

[0129] Reference Figure 10 In addition, the present application also provides a vehicle body leveling method applied to the above vehicle body height adjustment system. The vehicle body leveling method includes:

[0130] S1. Based on the tilt information of the vehicle body, determine the target air spring for adjusting the tilt information;

[0131] S2. Control the target control switch 54 corresponding to the target air spring to open, so that the storage part 51 transmits the pressure medium to the target air spring through the pipeline structure 53;

[0132] S3. When it is determined that the vehicle body is in a horizontal state, control the target control switch 54 to close.

[0133] In step S1, the actual tilt parameters of the vehicle body can be obtained by using the tilt detection module 40, so as to obtain the tilt information, and based on the detected tilt information, determine the target air spring 300 that needs to be activated.

[0134] In this step, the tilt information may include the tilt height and / or tilt angle. The tilt height may include the tilt height of the vehicle body air spring connection part from the reference height, and the tilt angle may include the tilt angle of the vehicle body air spring connection part relative to the reference plane (such as the central cross-section M and / or the central longitudinal section N). In addition, the tilt level of the vehicle body (such as level one, level two, level three, etc.) can also be determined according to the tilt information, and the air springs that need to participate can be determined.

[0135] In step S2, after determining the participating air springs 300, control the target control switch 54 on the pipeline corresponding to the participating air springs 300 to open by the control component 60, inject the liquid pressure medium into the air springs 300, change the volume inside the air springs 300, and then change the leveling pressure and thus realize the adjustment of the whole vehicle attitude.

[0136] During this process, when the vehicle body 100 is tilted, the control component 60 controls the leveling drive device 50 to act according to the calculated lifting height value. The leveling drive device 50 provides a driving force to the movable member 30 in the air spring 300 on the tilted side, driving the movable member 30 to move upward, compressing the gas inside the first accommodation chamber 11, increasing the air pressure, and thus lifting the tilted part of the vehicle body 100 until the entire vehicle body 100 is generally in a horizontal state. After the leveling is completed, the control component 60 adjusts the leveling drive device 50 to drive the movable member 30 to reset.

[0137] In this embodiment, the basis for determining the tilt of the vehicle body 100 is that the measured tilt parameter obtained by calculation is compared with the tilt parameter value pre-stored inside the control component 60. When the measured tilt parameter value exceeds the numerical range pre-stored inside the control component 60, it is determined that the vehicle body 100 is tilted to one side. When driving the movable member 30, the power can be pneumatic, hydraulic, or mechanical power. The air pressure inside the air spring 300 increases under the pressure of its movable member 30, and based on the calculated height difference, the air spring 300 expands to lift the vehicle body 100 on the tilted side until it is restored to a generally horizontal state.

[0138] In step S3, when it is determined that the vehicle body is in a horizontal state, the control switch 54 that is controlled to be turned on is closed. When the control ends, by reducing the pressure of the hydraulic system, the inside of the air spring 300 can be restored to its initial state. During this process, when the vehicle body 100 is generally horizontal, the air spring 300 operates normally, and the gas in the first accommodation chamber 11 fills the entire cavity of the air spring 300, pushing the movable member 30 to the limit position at the bottom of the second accommodation chamber 21 to achieve reset, preparing for the next adjustment, as shown in the figure. Thereafter, the above steps S1 to S3 can be repeatedly executed.

[0139] Furthermore, after step S1: Based on the tilt information of the vehicle body 100, determining the target air spring for adjusting the tilt information, an early warning can be further included, that is, after the tilt detection module 40 detects and obtains the tilt information of the vehicle body corresponding to each air spring 300, including tilt parameters, etc., the tilt information is transmitted to the control component 60. When the tilt parameter is greater than or equal to the early warning value, the control component 60 controls the alarm device to emit an alarm signal and controls the vehicle body to decelerate.

[0140] In summary, the air spring, vehicle body height adjustment system, and vehicle body leveling method provided by this application can gradually and steadily increase the air pressure inside the air spring 300 when the attitude of the vehicle 1000 is severely tilted, lift one side of the vehicle 1000, and at the same time increase the stiffness of the air spring 300, prevent the vehicle 1000 from losing balance or tipping over, and improve the reliability of the operation of the vehicle 1000.

[0141] It should be noted that when a component is referred to as being "fixed to" or "secured to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", "front", "rear" and similar expressions used in the description of this application are only for illustrative purposes and do not represent the only implementation. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined. Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0142] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. An air spring, characterized in that: include: The capsule skin is enclosed to form a second accommodating cavity; A bladder skin seat, enclosing to form a first accommodating cavity and connected to the bladder skin; A movable member is disposed in the first accommodating cavity, the movable member is slidably and sealingly matched with the side wall of the bag skin seat and divides the first accommodating cavity into a first sub-cavity and a second sub-cavity; The bag skin seat is provided with a first opening for connecting the first sub-cavity and the second accommodating cavity and a second opening for connecting the second sub-cavity with the outside. The second opening is used for allowing external pressure medium to enter and exit the second sub-cavity to drive at least partial sliding of the movable part, so that the volume of the first sub-cavity is reduced or increased.

2. The air spring according to claim 1, characterized in that: The bag skin seat comprises a first wall located on one side of the side wall along a first direction, the first opening is arranged through the first wall, and the projection of the movable part in the first direction is arranged to overlap with the first wall; and / or, The bag skin seat includes a second wall located at one side of the side wall along the first direction, the second opening is arranged through the second wall, and the projection of the movable part in the first direction is arranged to overlap with the second wall.

3. The air spring according to claim 2, characterized in that: The side wall includes a first part and a second part connected in an integral manner, two ends of the second part in the first direction are connected to the first part and the first wall respectively, and the bag skin includes a connecting portion arranged on the outer peripheral side of the second part in the first direction; The air spring further includes a connecting piece, the connecting piece is arranged in the first direction on a side of the connecting portion away from the second portion, so as to connect the connecting portion to the second portion; The connecting member is located inside the second accommodating cavity.

4. The air spring according to claim 3, characterized in that: The air spring further includes a tube body connected to the second opening. The tube body is inserted into the second opening. A surface of the tube body facing the second sub-cavity is flush with a surface of the second wall facing the first wall.

5. The air spring according to claim 1, characterized in that: The second containing chamber and the first sub-chamber are configured to contain a gas medium, and the second sub-chamber is configured to contain a liquid medium.

6. The air spring according to claim 5, characterized in that: The gaseous medium includes air, and the liquid medium includes hydraulic oil.

7. The air spring according to claim 1, characterized in that: The movable part comprises a main body and a sealing part. The outer peripheral side of the main body is recessed to form a receiving groove. The sealing part is at least partially located in the receiving groove and is arranged in contact with the side wall.

8. A vehicle height adjustment system, characterized in that: The invention comprises a plurality of air springs according to any one of claims 1 to 7.

9. The vehicle height adjustment system according to claim 8, characterized in that: It also includes a storage component, a driving pump, a pipeline structure and a control switch, wherein the storage component is used to store pressure medium, the pipeline structure includes a main structure and a plurality of branch structures, the storage component and the driving pump are both arranged on the main structure, and the plurality of branch structures are connected in parallel to the main structure to form a plurality of loop structures; Among them, different branch structures 532 are respectively connected to the second openings of different air springs, and are respectively provided with the control switches.

10. A vehicle body leveling method, characterized in that: Using the vehicle body height adjustment system as claimed in claim 9, the vehicle body leveling method comprises: Based on the inclination information of the vehicle body, determining a target air spring for adjusting the inclination information; Controlling a target control switch corresponding to the target air spring to be turned on, so that the storage element transmits pressure medium to the target air spring through a pipeline structure; When it is determined that the vehicle body is in a horizontal state, the target control switch is controlled to be closed.

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