Dual chamber air spring cartridge and vehicle suspension system

Abstract

The application relates to a double-chamber air spring cartridge and a vehicle suspension system, the double-chamber air spring cartridge comprising a double-chamber air spring and a cartridge; the cartridge is fixedly connected with a corner module; a containing cavity is arranged in the cartridge and is used for containing the double-chamber air spring; the double-chamber air spring comprises a locking mechanism, a main chamber, a secondary chamber, an electromagnetic valve group and a self-sealing joint; the locking mechanism is arranged on the outer side of the double-chamber air spring and is used for being clamped with the cartridge so as to lock and connect the cartridge and the double-chamber air spring. The double-chamber air spring cartridge in the application can complete the mounting and dismounting of the double-chamber air spring in a very short time without any tool, and greatly improves the mounting and dismounting speed of the double-chamber air spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of double-chamber air springs, and in particular to a double-chamber air spring cartridge and a vehicle suspension system. BACKGROUND

[0002] A double-chamber air spring is one of the core components in a vehicle suspension system, has two independent chambers inside, and can adjust air pressure separately to change the hardness or height of the double-chamber air spring, thereby bearing the support and buffering of the vehicle.

[0003] In the related art, one end of the double-chamber air spring is connected to a suspension lower arm through a bolt or a ball head, the other end is connected to a vehicle body or a suspension support, and the double-chamber air spring is also connected to a gas tank outside the suspension through a pipeline.

[0004] However, the double-chamber air spring in the related art has the problems of complex structure and inconvenient assembly. SUMMARY

[0005] Therefore, it is necessary to provide a double-chamber air spring cartridge and a vehicle suspension system which are easy to assemble in view of the problems in the prior art.

[0006] In a first aspect, the present application provides a double-chamber air spring cartridge, which adopts the following technical scheme:

[0007] The double-chamber air spring cartridge comprises a double-chamber air spring and a cartridge.

[0008] The cartridge is used to be fixedly connected with an angle module, and the cartridge is provided with an accommodation cavity for accommodating the double-chamber air spring.

[0009] The double-chamber air spring comprises a locking mechanism, a main chamber, a secondary chamber, an electromagnetic valve group, and a self-sealing joint, the locking mechanism is arranged on the outside of the double-chamber air spring, and the locking mechanism is used to be clamped with the cartridge to lock and connect the cartridge and the double-chamber air spring.

[0010] In one embodiment, the locking mechanism comprises a plurality of locking bolts,

[0011] The cartridge is provided with a guide groove at a position corresponding to the locking bolt, the guide groove comprises a limiting portion and a locking portion, one end of the limiting portion is in communication with one end of the locking portion, and the limiting portion and the locking portion are perpendicular to each other.

[0012] The limiting portion is used to limit the locking bolt, so that the locking bolt enters the locking portion through the limiting portion.

[0013] The locking portion is used to be clamped with the locking bolt, so that the double-chamber air spring is locked and connected with the cartridge.

[0014] In one of the embodiments, the self-sealing connector comprises a female connector and a valve core, the female connector is arranged between the auxiliary chamber and the main chamber, and the valve core is embedded in the female connector;

[0015] The female connector and the valve core are used to cooperate with the male connector on the angle module air path plate to guide the main chamber and the system air path or guide the auxiliary chamber and the system air path when the cartridge is connected with the double-chamber air spring.

[0016] In one of the embodiments, the electromagnetic valve group comprises a communication valve and an exhaust valve, the electromagnetic valve group is installed between the main chamber and the auxiliary chamber, and the electromagnetic valve group is connected with the main chamber and the auxiliary chamber respectively;

[0017] The communication valve is used to communicate the main chamber and the auxiliary chamber based on the received first control signal;

[0018] The exhaust valve is used to guide the main chamber and the external environment or guide the auxiliary chamber and the external environment based on the received second control signal.

[0019] In one of the embodiments, the electromagnetic valve group is connected with the main chamber and the auxiliary chamber through an air passage, the distance of the air passage is less than 20 mm, and the volume of the air passage is less than 5 ml.

[0020] In one of the embodiments, the main chamber comprises an air bag, and the double-chamber air spring cartridge further comprises a piston disc, the piston disc is arranged on the side of the main chamber away from the cartridge, and the piston disc is movably connected with the air bag.

[0021] In one of the embodiments, the cartridge is provided with a Hall sensor, and the double-chamber air spring is provided with a magnet, the magnet is arranged on the side close to the cartridge, and the magnet is used to generate an in-place electric signal by inducting the Hall sensor when close to the cartridge.

[0022] In one of the embodiments, the cartridge is provided with a reader-writer, and the double-chamber air spring is provided with a radio frequency tag, the radio frequency tag is arranged on the side close to the cartridge, and the radio frequency tag is used to generate a radio frequency identification signal by radio frequency identification by the reader-writer when close to the cartridge.

[0023] In a second aspect, the application provides a vehicle suspension system comprising the double-chamber air spring cartridge of the first aspect.

[0024] In one of the embodiments, the vehicle suspension system further comprises an electronic control unit, the electronic control unit is communicatively connected with the reader-writer and the Hall sensor in the double-chamber air spring cartridge respectively;

[0025] The electronic control unit is used for identification matching processing according to the in-place electric signal sent by the Hall sensor and the radio frequency identification signal sent by the reader, and generates a first control signal and a second control signal; the first control signal is used for controlling the communication valve in the double-chamber air spring cassette to communicate the main chamber and the auxiliary chamber, and the second control signal is used for controlling the main chamber or the auxiliary chamber of the double-chamber air spring cassette to communicate with the external environment.

[0026] The double-chamber air spring cassette and the vehicle suspension system, when installed, the double-chamber air spring is pushed vertically into the cassette, and then the locking mechanism is connected with the cassette by rotating the double-chamber air spring, so as to lock and connect the cassette and the double-chamber air spring. When disassembled, the locking mechanism is unlocked with the cassette by reversing the rotation of the double-chamber air spring, so that the double-chamber air spring can be separated from the cassette. The double-chamber air spring cassette in the application can complete the installation and disassembly of the double-chamber air spring in a very short time without any tools, greatly improving the installation and disassembly speed of the double-chamber air spring. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is an overall structure schematic diagram of the double-chamber air spring cassette in an embodiment;

[0028] Figure 2 It is a cross-sectional structure schematic diagram of the double-chamber air spring cassette in an embodiment.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, double-chamber air spring; 2, cassette; 21, guide groove; 211, limiting part; 212, locking part; 3, locking mechanism; 4, main chamber; 5, auxiliary chamber; 6, electromagnetic valve group; 7, self-sealing joint; 8, piston disc; 9, dust cover. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application will be described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the application, therefore the application is not limited to the specific embodiments disclosed below.

[0032] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0033] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0035] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on" or "below" the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] It is to be noted that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms used herein are for purposes of description and are not meant to be limiting.

[0037] The following description is made in connection with the drawings identified below. Figure 1 and Figure 2 The embodiments of the present application are further described in detail.

[0038] Figure 1 The overall structure of the double-chamber air spring cartridge in an embodiment of the present application is shown in the schematic diagram; Figure 2 The cross-sectional structure of the double-chamber air spring cartridge in an embodiment of the present application is shown in the schematic diagram.

[0039] Referring to Figure 1 and Figure 2 The double-chamber air spring cartridge provided by an embodiment of the present application includes: a double-chamber air spring 1 and a cartridge 2; the cartridge 2 is used for fixedly connecting with a corner module, and the cartridge 2 is provided with a containing cavity for containing the double-chamber air spring 1; the double-chamber air spring 1 includes a locking mechanism 3, a main chamber 4, a secondary chamber 5, an electromagnetic valve group 6, and a self-sealing joint 7; the locking mechanism 3 is arranged on the outside of the double-chamber air spring 1, and is used for clamping with the cartridge 2 to lock and connect the cartridge 2 with the double-chamber air spring 1.

[0040] The cartridge 2 can be a hollow cylindrical structure, and the cartridge 2 as a whole can be formed of an aluminum alloy or a fiber-reinforced composite material.

[0041] In some embodiments, the outside of the double-chamber air spring 1 is further provided with a foolproof protrusion corresponding to a foolproof groove on the inside of the cartridge 2, so as to ensure the unique insertion angle of the double-chamber air spring 1.

[0042] The double-chamber air spring cartridge in the embodiment of the present application is installed by vertically pushing the double-chamber air spring 1 into the cartridge 2, and then rotating the double-chamber air spring 1 to clamp the locking mechanism 3 with the cartridge 2, so as to lock and connect the cartridge 2 with the double-chamber air spring 1. When the double-chamber air spring 1 is unloaded, the locking mechanism 3 is unlocked from the cartridge 2 by reversely rotating the double-chamber air spring 1, so that the double-chamber air spring 1 can be separated from the cartridge 2. The double-chamber air spring cartridge in the present application can complete the loading and unloading of the double-chamber air spring 1 in a very short time without any tool, and greatly improves the loading and unloading speed of the double-chamber air spring 1.

[0043] In one exemplary embodiment, continuing to refer to Figure 1 The locking mechanism 3 includes a plurality of locking bolts, and the cassette 2 is provided with a guide groove 21 at a corresponding position of the locking bolt, the guide groove 21 includes a limiting portion 211 and a locking portion 212, one end of the limiting portion 211 communicates with one end of the locking portion 212, and the limiting portion 211 and the locking portion 212 are perpendicular to each other; the limiting portion 211 is used for limiting the locking bolt, so that the locking bolt enters the locking portion 212 through the limiting portion 211; the locking portion 212 is used for clamping with the locking bolt, so that the double chamber air spring 1 is locked and connected with the cassette 2.

[0044] The guide groove 21 is formed on the side wall of the cassette 2, and the number of the guide groove 21 is consistent with that of the locking bolt. For example, the number of the guide groove 21 can be 2, which is symmetrically distributed on both sides of the cassette 2, or the number of the guide groove 21 can be 3, which is uniformly distributed along the circumferential side of the cassette 2. The locking bolt is made of M6 stainless steel, and one end of the locking bolt clamped with the guide groove 21 is provided with knurling, which is convenient for manual operation of the operator.

[0045] In some embodiments, the cassette 2 is formed with the guide groove 21 and the foolproof groove at the pressure casting stage, then the guide groove 21 is refined by machining, and the hard anodic oxidation treatment and deburring are performed, so as to ensure that the surface of the cassette 2 is smooth and wear-resistant; finally, the shell of the cassette 2 is comprehensively refined by numerical control machining, and the surface is treated by shot blasting before anodic oxidation, so as to provide excellent corrosion resistance and aesthetic degree.

[0046] The double chamber air spring cassette in the embodiment of the application is installed by vertically pushing the double chamber air spring 1 into the cassette 2 along the limiting portion 211 of the guide groove 21, and rotating the double chamber air spring 1 to make the head of the locking bolt clamped into the locking portion 212, so as to realize synchronous locking in the axial and circumferential dimensions, and ensure that the connection between the double chamber air spring 1 and the cassette 2 is stable and reliable. When replacing, the locking bolt is disengaged from the locking portion 212 by reversely rotating the double chamber air spring 1, the locking between the double chamber air spring 1 and the cassette 2 is released, and the double chamber air spring 1 can be pulled out of the cassette 2 along the limiting portion 211. The double chamber air spring cassette in the application can greatly reduce the assembly complexity of the double chamber air spring 1 and improve the assembly speed.

[0047] In one exemplary embodiment, the self-sealing joint 7 includes a female end joint and a valve core, the female end joint is arranged between the auxiliary chamber 5 and the main chamber 4, and the valve core is embedded in the female end joint; the female end joint and the valve core are used for cooperating with the male end joint on the corner module air path plate in the state that the cassette 2 is locked and connected with the double chamber air spring 1, so as to conduct the main chamber 4 and the system air path, or conduct the auxiliary chamber 5 and the system air path.

[0048] The male connector is fixed to the air path plate of the corner module. The valve core adopts a spring-loaded normally closed structure.

[0049] In some embodiments, the opening pressure of the valve core is less than or equal to 0.05 MPa, and the valve core is equipped with a double-layer FKM (Fluororubber) sealing ring, which has pressure resistance, wear resistance and chemical corrosion resistance, can withstand harsh operating environments, and ensures long-term reliability.

[0050] Under normal working pressure, the valve core remains closed to isolate the double-chamber air spring 1 from the system air path. When the double-chamber air spring 1 needs to be connected to the system air path, the male connector is inserted into the female connector, the top rod on the male connector directly acts on the valve core in the female connector, the valve core is opened, and the main chamber 4 and the auxiliary chamber 5 are instantaneously connected to the system air path to complete system inflation or pressure transmission. When the connection needs to be disconnected, the male connector is separated from the female connector, and the valve core is quickly and automatically reset under the action of the built-in spring to complete complete sealing, ensuring high reliability of the double-chamber air spring 1 after disconnection.

[0051] In some embodiments, the valve core is machined by numerical control turning process to achieve high-precision dimensions and smooth surfaces, and the valve core surface is covered with a DLC (Diamond-Like Carbon coating) coating to significantly improve its wear resistance and corrosion resistance. The spring used to drive the valve core to reset is subjected to vacuum quenching to obtain the best hardness and strength, and is subjected to shot peening strengthening process to eliminate internal stress, improve the fatigue life and crack resistance of the spring. Moreover, the self-sealing connector 7 in the embodiments of the present application needs to pass strict overall air tightness test, and the pressure of 0.8 MPa is maintained for 30 seconds. During this process, no air bubbles are allowed to be detected, so as to ensure that the self-sealing connector 7 meets the strict air tightness requirement and ensures safe and reliable operation under various working conditions.

[0052] The self-sealing connector 7 in the embodiments of the present application can complete complete sealing within 0.1 seconds after the male connector and the female connector are disconnected, and the leakage rate is controlled to be less than or equal to 1×10 -5 Pa·m³ / s, which can effectively prevent air leakage and avoid secondary inflation and system pollution.

[0053] In an exemplary embodiment, the electromagnetic valve group 6 includes a communication valve and an exhaust valve, the electromagnetic valve group 6 is installed between the main chamber 4 and the auxiliary chamber 5, and the electromagnetic valve group 6 is connected with the main chamber 4 and the auxiliary chamber 5, respectively; the communication valve is used to communicate the main chamber 4 and the auxiliary chamber 5 based on a received first control signal; and the exhaust valve is used to conduct the main chamber 4 to the external environment or conduct the auxiliary chamber 5 to the external environment based on a received second control signal.

[0054] The communication valve and the exhaust valve can both adopt a 2 / 2 normally closed design. The first control signal and the second control signal are PWM signals output by an electronic control unit (ECU) of the vehicle. In some embodiments, the ECU is electrically connected to the electromagnetic valve group 6 through a wire harness connector, which can be a 4-pin waterproof quick connector meeting the IP67 protection level, to ensure that the electromagnetic valve group 6 can work stably and reliably in various harsh environments.

[0055] In some embodiments, the valve body of the communication valve and the exhaust valve is first subjected to die casting, then deburring, and finally nickel plating on the surface to enhance its corrosion resistance and wear resistance. The coil part of the communication valve and the exhaust valve is subjected to a vacuum paint dipping process and a curing treatment at 120°C to ensure its insulation performance and long-term stability. The communication valve and the exhaust valve in the embodiments of the application have also been subjected to a full test of continuous operation of 1 million times at a square wave signal of 1 Hz to ensure that there is no jamming phenomenon in the entire life cycle of the communication valve and the exhaust valve, thereby ensuring the stable performance and long service life of the electromagnetic valve group 6 in actual application.

[0056] For example, the communication valve is in a normally closed state, the main chamber 4 and the auxiliary chamber 5 are in an isolated state, and the gas is more difficult to compress under pressure, so the double-chamber air spring 1 has a higher stiffness; when the ECU of the vehicle receives a driving instruction or a road condition change signal, it generates a first control signal, and the communication valve connects the main chamber 4 and the auxiliary chamber 5 based on the received first control signal, rapidly increases the effective volume of the double-chamber air spring 1, and the stiffness of the double-chamber air spring 1 decreases, so that the vehicle suspension system becomes softer and provides a more comfortable driving experience.

[0057] For another example, when the ECU of the vehicle detects a fault, it generates a second control signal, and the exhaust valve opens based on the second control signal to discharge part of the air, thereby playing a role of rapid pressure relief and improving safety.

[0058] In a possible implementation, the electromagnetic valve group 6 is connected to the main chamber 4 and the auxiliary chamber 5 through an air passage, the distance of the air passage is less than 20 mm, and the volume of the air passage is less than 5 ml.

[0059] In the embodiments of the application, by precisely controlling the electromagnetic valve group 6 and minimizing the volume of the air passage, the distance and volume required for air transmission are greatly shortened, thereby ensuring a millisecond-level response from the issuance of the instruction from the ECU to the change of the stiffness of the double-chamber air spring 1, and realizing real-time adjustment of the state of the vehicle.

[0060] In an exemplary embodiment, the main chamber 4 includes an air bag, and the double-chamber air spring cartridge further includes: a piston disc 8 arranged on the side of the main chamber 4 away from the cartridge 2, and the piston disc 8 is movably connected with the air bag.

[0061] The piston disc 8 can be a hollow structure, and the center through hole can have a precision of H7 to ensure smooth operation of the piston. The surface of the piston disc 8 is coated with a wear-resistant coating of PTFE (Polytetrafluoroethylene) and MoS2 (Molybdenum Disulfide), and the coating thickness can be 30 microns. The wear-resistant coating has excellent self-lubricating, low-friction and high-wear-resistant properties, which provides reliable protection for the reciprocating motion of the piston disc 8. The piston disc 8 in the embodiment of the application is verified by dynamic sealing bench test, and the wear amount of the wear-resistant coating is less than 5 microns after 1 million cycles of reciprocating motion, thereby effectively protecting the service life of the double-chamber air spring 1 and ensuring the performance stability during long-term use.

[0062] In a possible implementation, the piston disc 8 is provided with two annular sealing ring grooves at one end close to the air bag, for installing sealing members to achieve sealed connection between the piston and the air bag.

[0063] Exemplarily, under the action of air pressure, the piston disc 8 slides up and down with the air pressure difference, achieving a displacement of ±80 millimeters, thereby adjusting the effective volume of the main chamber 4 and affecting the stiffness of the double-chamber air spring 1.

[0064] In some embodiments, the piston disc 8 is manufactured by one-time die casting process, and then subjected to T6 heat treatment to optimize its mechanical properties, and two annular sealing ring grooves are accurately machined by numerical control precision turning process. In terms of wear resistance, the wear-resistant coating is uniformly sprayed on the surface of the piston disc 8 by plasma spraying process, and is subjected to solidification treatment at 220°C for 2 hours to ensure firm bonding and maximum performance of the wear-resistant coating. The piston disc 8 in the application is subjected to dynamic sealing bench test, and is tested for 1 million cycles at a frequency of 1 Hz under a pressure of 0.6 MPa to ensure that its sealing performance and durability meet the design requirements, thereby ensuring the reliability of the double-chamber air spring 1.

[0065] In a possible implementation, the double-chamber air spring 1 further includes a dust cover 9, which is sleeved on the outside of the piston disc 8 and the main chamber 4.

[0066] The dust cover 9 can be a corrugated pipe made of thermoplastic polyurethane (TPU) material, and has an automatic stretching and retracting function. One end of the dust cover 9 is connected with the corner module, and the other end is connected with the main chamber 4, and cooperates with the displacement of the piston to automatically stretch and retract, which can effectively prevent dust, impurities and other pollutants from entering the inside of the double-chamber air spring 1, and plays a role of protecting the internal piston disc 8, the main chamber 4 and other components, and can prolong the service life of the double-chamber air spring cartridge.

[0067] In an exemplary embodiment, the cartridge 2 is provided with a Hall sensor, and the double-chamber air spring 1 is provided with a magnet, which is arranged on the side close to the cartridge 2. The magnet is used to generate an in-place electric signal with the Hall sensor when it is close to the cartridge 2.

[0068] The magnet has a unique polarity, and the Hall sensor adopts a patch type package with a working voltage of 3.3V. In some embodiments, the Hall sensor is mounted on the cartridge 2 by surface mount technology (SMT), and is treated with three-proof paint for moisture-proof, salt mist-proof and mildew-proof, so as to enhance its protection ability in harsh environment.

[0069] In a possible implementation, the cartridge 2 is further provided with a reader-writer, and the double-chamber air spring 1 is provided with a radio frequency tag, which is arranged on the side close to the cartridge 2. The radio frequency tag is used to generate a radio frequency identification signal for the reader-writer to perform radio frequency identification when it is close to the cartridge 2.

[0070] The radio frequency tag stores key information such as product model and cumulative mileage. The reader-writer communicates with the vehicle ECU through a serial peripheral interface (SPI) bus to realize high-speed exchange of data.

[0071] In some embodiments, the radio frequency tag is encoded by laser during production, and then is encapsulated by epoxy to ensure the persistence of data storage and the physical stability of the radio frequency tag.

[0072] In some embodiments, before the whole vehicle is completed, the ECU of all vehicles will be uniformly programmed through a controller area network (CAN) bus to match the preset running map of the double-chamber air spring 1, so as to accurately interact and control the Hall sensor and the radio frequency tag.

[0073] Exemplarily, the ECU can identify the in-place state of the double-chamber air spring 1 and the operating mode thereof through the information of the Hall sensor and the reader / writer, and output accurate control instructions accordingly. When the vehicle is in a specific working condition, the Hall sensor detects the magnet and outputs an in-place electrical signal, such as a high-level signal; the ECU receives the in-place electrical signal, and determines that the double-chamber air spring 1 is in place. The ECU reads the information in the radio frequency tag through the radio frequency identification signal sent by the reader / writer, and based on the read information, such as the product model and the accumulated mileage, the ECU can call a preset internal map. The internal map can include suspension parameter settings for different working conditions, such as "city mode" or "high-speed mode". The ECU can output corresponding control signals according to the selected map, accurately control the opening and closing of the electromagnetic valve group 6, and drive the double-chamber air spring 1 to realize millisecond-level stiffness switching.

[0074] In combination Figure 1 and Figure 2 As shown in FIGS. 1, 2 and 3, an embodiment of the present application provides a double-chamber air spring cartridge, which comprises a double-chamber air spring 1 and a cartridge 2.

[0075] The cartridge 2 is used for fixed connection with an angle module, and the cartridge 2 is provided with a containing cavity for containing the double-chamber air spring 1.

[0076] The double-chamber air spring 1 comprises a locking mechanism 3, a main chamber 4, a secondary chamber 5, an electromagnetic valve group 6 and a self-sealing connector 7. The locking mechanism 3 is arranged on the outside of the double-chamber air spring 1, and is used for clamping connection with the cartridge 2, so as to lock and connect the cartridge 2 and the double-chamber air spring 1.

[0077] The locking mechanism 3 comprises a plurality of locking bolts, and the cartridge 2 is provided with a guide groove 21 at a corresponding position of the locking bolts. The guide groove 21 comprises a limiting portion 211 and a locking portion 212. One end of the limiting portion 211 is in communication with one end of the locking portion 212, and the limiting portion 211 and the locking portion 212 are perpendicular to each other. The limiting portion 211 is used for limiting the locking bolts, so that the locking bolts enter the locking portion 212 through the limiting portion 211. The locking portion 212 is used for clamping connection with the locking bolts, so as to lock and connect the double-chamber air spring 1 and the cartridge 2.

[0078] The self-sealing connector 7 comprises a female connector and a valve core. The female connector is arranged between the secondary chamber 5 and the main chamber 4, and the valve core is embedded in the female connector. The female connector and the valve core are used for cooperating with a male connector on a gas circuit board of the angle module in a state that the cartridge 2 and the double-chamber air spring 1 are locked and connected, so as to conduct the main chamber 4 and a system gas circuit, or conduct the secondary chamber 5 and the system gas circuit.

[0079] The electromagnetic valve group 6 includes a communication valve and an exhaust valve, is installed between the main chamber 4 and the auxiliary chamber 5, and is connected with the main chamber 4 and the auxiliary chamber 5 respectively; the communication valve is used for communicating the main chamber 4 and the auxiliary chamber 5 based on a received first control signal; and the exhaust valve is used for conducting the main chamber 4 to the external environment or conducting the auxiliary chamber 5 to the external environment based on a received second control signal.

[0080] The electromagnetic valve group 6 is connected with the main chamber 4 and the auxiliary chamber 5 through air passages, the distance of the air passages is less than 20 mm, and the volume of the air passages is less than 5 ml.

[0081] The main chamber 4 includes an air bag, and the double-chamber air spring cartridge further includes a piston disc 8 arranged on the side of the main chamber 4 away from the cartridge 2, and the piston disc 8 is movably connected with the air bag.

[0082] The cartridge 2 is provided with a Hall sensor, and the double-chamber air spring 1 is provided with a magnet arranged on the side close to the cartridge 2, the magnet is used for generating an in-place electric signal with the Hall sensor when close to the cartridge 2.

[0083] The cartridge 2 is provided with a reader-writer, and the double-chamber air spring 1 is provided with a radio frequency tag arranged on the side close to the cartridge 2, the radio frequency tag is used for generating a radio frequency identification signal with the reader-writer when close to the cartridge 2.

[0084] In an exemplary embodiment, a vehicle suspension system is provided, which can include the double-chamber air spring cartridge in the above embodiments.

[0085] In an exemplary embodiment, the vehicle suspension system further includes an electronic control unit ECU in communication connection with the reader-writer and the Hall sensor in the double-chamber air spring cartridge respectively; the electronic control unit ECU is used for performing identification matching processing according to the in-place electric signal sent by the Hall sensor and the radio frequency identification signal sent by the reader-writer, and generating a first control signal and a second control signal; the first control signal is used for controlling the communication valve in the double-chamber air spring cartridge to communicate the main chamber 4 and the auxiliary chamber 5, and the second control signal is used for controlling the exhaust valve in the double-chamber air spring cartridge to conduct the main chamber 4 to the external environment or conduct the auxiliary chamber 5 to the external environment.

[0086] In the description of the present specification, the description of the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0087] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations do not conflict with each other, they should be considered to be within the scope of the present disclosure.

[0088] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A dual chamber air spring cartridge, comprising: The double-chamber air spring cartridge comprises a double-chamber air spring and a cartridge. The cartridge is used for fixed connection with an angle module, and a containing cavity is arranged in the cartridge and used for containing the double-chamber air spring. The double-chamber air spring comprises a locking mechanism, a main chamber, a secondary chamber, an electromagnetic valve group and a self-sealing joint, the locking mechanism is arranged outside the double-chamber air spring, and the locking mechanism is used for clamping the cartridge to lock and connect the cartridge and the double-chamber air spring. The locking mechanism comprises a plurality of locking bolts, the cartridge is provided with a guide groove at a corresponding position of the locking bolt, the guide groove comprises a limiting portion and a locking portion, one end of the limiting portion is communicated with one end of the locking portion, and the limiting portion and the locking portion are perpendicular to each other; the limiting portion is used for limiting the locking bolt, so that the locking bolt enters the locking portion through the limiting portion; and the locking portion is used for clamping the locking bolt, so that the double-chamber air spring is locked and connected with the cartridge. The self-sealing joint comprises a female joint and a valve core, the female joint is arranged between the secondary chamber and the main chamber, the valve core is embedded in the female joint, and the female joint and the valve core are used for cooperating with a male joint on an angle module air circuit board in a state that the cartridge is locked and connected with the double-chamber air spring, so as to conduct the main chamber and a system air circuit or conduct the secondary chamber and the system air circuit. A Hall sensor is arranged on the cartridge, a magnet is arranged on the double-chamber air spring, the magnet is arranged on a side close to the cartridge, and the magnet is used for sensing the Hall sensor when being close to the cartridge, so that the Hall sensor generates an in-place electric signal. A reader / writer is arranged on the cartridge, and a radio frequency tag is arranged on the double-chamber air spring, the radio frequency tag is arranged on a side close to the cartridge, and the radio frequency tag is used for being identified by the reader / writer to generate a radio frequency identification signal when being close to the cartridge.

2. The dual chamber air spring cartridge of claim 1, wherein, The electromagnetic valve group comprises a communication valve and an exhaust valve, the electromagnetic valve group is installed between the main chamber and the secondary chamber, and the electromagnetic valve group is connected with the main chamber and the secondary chamber respectively. The communication valve is used for communicating the main chamber and the secondary chamber based on a received first control signal. The exhaust valve is used for conducting the main chamber and an external environment or conducting the secondary chamber and the external environment based on a received second control signal.

3. The dual chamber air spring cartridge of claim 1, wherein, The electromagnetic valve group is connected with the main chamber and the secondary chamber through an air channel, the distance of the air channel is less than 20 mm, and the volume of the air channel is less than 5 ml.

4. The dual chamber air spring cartridge of claim 1, wherein, The main chamber comprises an air bag, and the double-chamber air spring cartridge further comprises a piston disc, the piston disc is arranged on a side of the main chamber away from the cartridge, and the piston disc is movably connected with the air bag.

5. The dual chamber air spring cartridge of any of claims 1-4, wherein, The cartridge is a hollow cylindrical structure, and the cartridge is formed by aluminum alloy or fiber reinforced composite material.

6. The dual chamber air spring cartridge of any of claims 1-4, wherein, A foolproof convex is further arranged outside the double-chamber air spring, and the foolproof convex corresponds to a foolproof groove inside the cartridge.

7. A vehicle suspension system characterized by, The double-chamber air spring cassette comprises the double-chamber air spring cassette according to any one of claims 1-6.

8. The vehicle suspension system of claim 7, wherein, The vehicle suspension system further comprises an electronic control unit, which is in communication connection with the reader and the Hall sensor in the double-chamber air spring cassette respectively; The electronic control unit is used for carrying out identification matching processing according to the in-place electric signal sent by the Hall sensor and the radio frequency identification signal sent by the reader, and generating a first control signal and a second control signal; the first control signal is used for controlling the communication valve in the double-chamber air spring cassette to communicate the main chamber and the auxiliary chamber, and the second control signal is used for controlling the double-chamber air spring cassette to guide the main chamber to the external environment or guide the auxiliary chamber to the external environment.

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