Air spring assembly and automobile

Abstract

The present invention relates to an air spring assembly and a car. The air spring assembly includes an air spring, an air chamber and an isolation valve. The isolation valve is arranged between an air bag and a rigid air chamber of the air spring, and the isolation valve is used to control the on and off of the air bag and the air chamber. The isolation valve includes a valve body provided with a valve port and a valve sheet for opening and closing the valve port. When the valve port is opened, the valve port connects the air bag and the air chamber, and when the valve port is closed, the isolation valve separates the air bag and the air chamber. The car includes an air spring assembly and a controller for controlling the opening and closing of the isolation valve. The present invention can change the stiffness of the air spring assembly, so as to better take into account the different requirements of the air spring stiffness under braking conditions, steering conditions and straight driving conditions, and improve the comfort and maneuverability of the whole vehicle. The present invention can quickly change the stiffness of the air spring assembly by reasonably arranging the structure of the air chamber and the isolation valve, so that the response speed of the air spring assembly can meet the requirements of roll and pitch control.

Description

Technical Field

[0001] The invention relates to an automobile, in particular to an air spring assembly and an automobile. Background Art

[0002] The application of air springs in automobile suspension systems is becoming increasingly popular. Air springs are installed between the vehicle body and the suspension, and have advantages such as adjustable vehicle height and obvious nonlinear stiffness, which improves the vehicle's handling and comfort.

[0003] The air springs currently in practical use usually achieve slow adjustment by inflating and deflating the airbags, which has the following technical problems: since it takes a certain amount of time to inflate the airbags of the air springs using the inflation device, it is impossible to actively control fast-changing processes such as steering roll and braking pitch, resulting in a significant increase in the initial displacement of the car body in emergency steering or emergency braking conditions. The driver will feel that the suspension support is insufficient and his confidence is reduced.

[0004] For example, the air spring with independently adjustable height and stiffness and its control method disclosed in the patent application with application number CN201610230749.4, and the electronically controlled air suspension vehicle posture control system and method disclosed in the patent application with application number CN201810895423.2. In both of the above patent applications, the stiffness of the air spring is adjusted by inflation and deflation, and there is a problem of slow adjustment of the stiffness of the air spring, which makes it difficult to achieve active control of the vehicle's roll and pitch.

[0005] In some prior art, an air chamber and a solenoid valve are added to the existing air spring. The solenoid valve is arranged between the airbag and the air chamber of the air spring, and the solenoid valve can control the on and off of the airbag and the air chamber. Although the stiffness of the air spring can be adjusted more quickly by adding an air chamber and a solenoid valve, there are the following technical problems during use: the sudden change in the stiffness of the air spring causes jitter, which has an adverse effect on the performance and service life of the air spring; since the solenoid valve is used to control the on and off of the airbag and the air chamber, the airway connecting the airbag and the air chamber is long and the cross-sectional area of ​​the airway is small, and the slender airway will limit the flow rate of gas flow between the airbag and the air chamber, and damping effect and abnormal noise will be generated when the airflow passes through the slender airway quickly. In addition, due to the restriction of the airway on the flow rate of gas flow between the airbag and the air chamber, the volume ratio of the air chamber and the airbag in the prior art is usually not more than 1 / 4, resulting in a small stiffness adjustment range of the existing air spring. Summary of the invention

[0006] The object of the present invention is to provide an air spring assembly and a vehicle to alleviate or eliminate at least one of the above-mentioned technical problems.

[0007] An air spring assembly described in the present invention includes an air spring, an air chamber and an isolation valve, wherein the isolation valve is arranged between the airbag of the air spring and the air chamber, and the isolation valve is used to control the on and off of the airbag and the air chamber; the isolation valve includes a valve body provided with a valve port and a valve sheet for opening and closing the valve port, when the valve port is opened, the valve port connects the airbag and the air chamber, and when the valve port is closed, the isolation valve separates the airbag and the air chamber.

[0008] Optionally, the air chamber is a rigid air chamber.

[0009] Optionally, the volume ratio of the air chamber and the airbag is not less than 1 / 4.

[0010] Optionally, the volume ratio of the air chamber and the airbag is not less than 2 / 3 and not greater than 1.

[0011] Optionally, the valve plate includes a plurality of movable valve plate units.

[0012] Optionally, a linear guide structure is provided between the plurality of valve sheet units and the valve body to guide the plurality of valve sheet units to move linearly along a plurality of radial directions of the valve port.

[0013] Optionally, the valve body is provided with a plurality of strip guide grooves extending in a plurality of radial directions of the valve port, and a plurality of valve sheet units are provided with guide parts, and the plurality of guide parts respectively cooperate with the plurality of strip guide grooves to respectively constitute a plurality of the linear guide structures.

[0014] Optionally, the isolation valve also includes a linkage ring, and a pushing structure is arranged between the multiple valve sheet units and the linkage ring. The multiple pushing structures are used to push the multiple valve sheet units respectively when the linkage ring rotates, so that the multiple valve sheet units can move linearly along multiple radial directions of the valve port respectively.

[0015] Optionally, a plurality of strip push grooves are provided on the linkage ring, and the lengths of the plurality of strip push grooves are gradually extended inward or outward along a circumferential direction of the valve port, and a matching part is provided on the plurality of valve sheet units, and the plurality of matching parts are respectively matched with the plurality of strip push grooves to respectively constitute a plurality of the pushing structures.

[0016] Optionally, multiple valve plate units are arranged in sequence in the circumferential direction of the valve port, and a first sealing groove is provided on one of the two splicing edges between two adjacent valve plate units, and a first sealing portion is provided on the other of the two splicing edges between two adjacent valve plate units. When the valve port is closed, the first sealing portion and the first sealing groove corresponding thereto are engaged to form a seal.

[0017] Optionally, the first sealing groove is a V-shaped groove, and the first sealing portion is configured as a wedge-shaped structure that matches the shape of the first sealing groove.

[0018] Optionally, the air spring assembly further includes a shock absorber, the valve body surrounds the outer periphery of the shock absorber, and the gap between the valve body and the shock absorber constitutes the valve port.

[0019] Optionally, a sealing ring is mounted on the shock absorber, a second sealing groove is provided on the outer side of the sealing ring, and second sealing parts are provided on the edges of multiple valve plate units on the side close to the sealing ring. When the valve port is closed, multiple second sealing parts are embedded in the second sealing groove to form a seal.

[0020] Optionally, the second sealing groove is a V-shaped groove, and the plurality of second sealing portions are each configured to have a wedge-shaped structure that matches the shape of the second sealing groove.

[0021] Optionally, an air chamber shell is fixedly connected to the periphery of the shock absorber, and the air chamber shell and the outer wall of the shock absorber form the air chamber.

[0022] Optionally, the isolation valve is mounted at an upper end of the air chamber housing.

[0023] Optionally, a driving motor for driving the isolation valve to open and close is provided in the air chamber.

[0024] An automobile according to the present invention comprises the air spring assembly described in any one of the above items and a controller for controlling the opening and closing of the isolation valve.

[0025] The present invention can change the stiffness of the air spring assembly, thereby better taking into account the different requirements of braking conditions, steering conditions and straight-ahead conditions for the stiffness of the air spring, thereby improving the comfort and maneuverability of the entire vehicle; the present invention can quickly change the stiffness of the air spring assembly by reasonably arranging the structure of the air chamber and the isolation valve, so that the response speed of the air spring assembly can meet the requirements of roll and pitch control. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the air spring assembly described in the specific implementation manner;

[0027] Figure 2 It is a schematic diagram of parts of the isolation valve described in the specific implementation manner;

[0028] Figure 3 is a cross-sectional view of the isolation valve described in the specific implementation manner;

[0029] Figure 4It is a structural schematic diagram of the base described in the specific implementation manner;

[0030] Figure 5 It is a structural schematic diagram of the valve sheet unit described in the specific implementation manner;

[0031] Figure 6 It is one of the structural schematic diagrams of the linkage ring described in the specific implementation manner;

[0032] Figure 7 This is the second structural schematic diagram of the linkage ring described in the specific implementation manner;

[0033] Figure 8 It is a schematic diagram of closing the isolation valve described in the specific implementation manner;

[0034] Fig. 9 It is a schematic diagram of the opening of the isolation valve described in the specific implementation manner;

[0035] Fig.10 It is a structural schematic diagram of the motor assembly and the linkage ring described in the specific implementation manner;

[0036] Fig.11 It is a structural schematic diagram of the sealing ring described in the specific implementation manner;

[0037] Fig.12 It is a schematic diagram of the cooperation between the sealing ring and the valve plate unit described in the specific implementation manner;

[0038] Fig.13 It is a schematic diagram of the installation of the motor assembly described in the specific implementation manner;

[0039] Fig.14 It is a schematic diagram of the installation of the sealing member described in the specific implementation manner.

[0040] In the figure: 1—shock absorber; 2—upper mounting seat; 3—airbag; 4—air chamber housing; 5—isolation valve; 6—motor assembly; 7—airbag cavity; 8—air chamber cavity;

[0041] 51 - pressure ring; 52 - base; 53 - valve unit; 54 - linkage ring; 55 - sealing ring;

[0042] 41—upper end surface; 42—wiring harness through hole; 43—step surface;

[0043] 511—pressing ring body; 512—pressing ring inner flange; 513—pressing ring center hole;

[0044] 521—strip guide groove; 522—center hole of base;

[0045] 531 - guide portion; 532 - matching portion; 533 - second sealing portion; 534 - first sealing portion; 535 - first sealing groove;

[0046] 541—strip push groove; 542—inner gear ring; 543—center hole of linkage ring;

[0047] 551—second sealing groove;

[0048] 61—driving motor; 62—gear; 63—mounting bracket; 64—wiring harness; 65—seal. DETAILED DESCRIPTION

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] like Figure 1 An air spring assembly shown includes an air spring, an air chamber and an isolation valve 5. The isolation valve 5 is arranged between the airbag 3 and the air chamber of the air spring. The isolation valve 5 is used to control the on and off of the airbag 3 and the air chamber. The isolation valve 5 includes a valve body provided with a valve port and a valve sheet for opening and closing the valve port. When the valve port is opened, the valve port connects the airbag 3 and the air chamber. When the valve port is closed, the isolation valve 5 separates the airbag 3 and the air chamber.

[0051] The above technical solution is adopted, by adding an air chamber and using the isolation valve 5 to control the on and off of the airbag 3 and the air chamber. When the car is in a straight-line driving condition, the isolation valve 5 is controlled to be opened, the airbag 3 and the air chamber are connected, the airbag cavity 7 inside the airbag 3 and the air chamber cavity 8 inside the air chamber together play the role of an air spring, and the air spring assembly is in a low-rigidity state, which can reduce the coupling of road vibration and impact to the vehicle body. When the car is in a steering or braking condition, the isolation valve 5 is controlled to be closed, the air chamber is isolated, and at this time only the airbag cavity 7 inside the airbag 3 plays the role of an air spring, and the air spring assembly is in a high-rigidity state, which can reduce the roll or pitch of the car. The roll or pitch process time is short, and the volume change of the airbag 3 can be regarded as an adiabatic process. According to the gas state equation, when the wheel bounces the same stroke (that is, the airbag 3 changes the same volume), the air pressure change amplitude inside the airbag 3 is greater than when the airbag 3 and the air chamber are connected, the change amplitude of the spring force is also greater, and the anti-roll moment obtained at the same angle of vehicle body roll is also greater. In specific design, by adjusting the volume ratio of the air chamber and the airbag 3, different stiffness increase characteristics can be obtained, thereby realizing a solution of a low-stiffness passive stabilizer bar + air spring or completely replacing the stabilizer bar.

[0052] In the above technical solution, a valve plate type isolation valve 5 is used to control the on-off of the airbag 3 and the air chamber, which can realize a valve port with a larger opening size, and the length of the valve port in the direction of airflow is very small, which can realize the rapid on-off of the valve port, and can realize the rapid and full connection between the airbag 3 and the air chamber. The valve port can be quickly closed under steering or braking conditions to realize the rapid adjustment of the stiffness of the air spring assembly, which is conducive to the active and immediate control of the roll and pitch of the vehicle, so that the response speed of the stiffness adjustment of the air spring assembly can meet the requirements of the roll and pitch control of the vehicle. On the other hand, since the opening size of the valve port is large and the length of the valve port in the direction of airflow is very small, when the valve port is opened, the airflow can pass through the valve port smoothly, which can prevent the damping effect and abnormal noise, and is also conducive to improving the comfort of the air spring assembly in a low stiffness state.

[0053] In some embodiments, the air chamber is a rigid air chamber. After being connected to the airbag 3, the rigid air chamber can reduce the air pressure change amplitude inside the airbag 3; after being separated from the airbag 3, the rigid air chamber will not be deformed, and the rigid air chamber will not play the role of an air spring. At this time, only the airbag cavity 7 inside the airbag 3 plays the role of an air spring, that is, the use of a rigid air chamber is conducive to quickly and significantly changing the stiffness of the air spring assembly.

[0054] In some embodiments, the volume ratio of the air chamber and the airbag 3 is not less than 1 / 4. By adopting a valve plate type isolation valve 5, a faster and larger flow of gas can be achieved between the airbag 3 and the air chamber, which provides the possibility of setting a larger volume air chamber. As a preferred embodiment, through specific experimental verification, the valve plate type isolation valve proposed in this application can be used to set the volume ratio of the air chamber and the airbag 3 to not less than 2 / 3. When the volume ratio of the air chamber and the airbag 3 is set to 2 / 3, the stiffness of the air spring assembly after closing the isolation valve can reach 1.7 times the stiffness of the air spring assembly before closing the isolation valve. In specific implementation, the volume ratio of the air chamber and the airbag 3 is usually set to not more than 1. When the volume ratio of the air chamber and the airbag 3 is 1, the ratio of the stiffness of the air spring assembly after closing the isolation valve to the stiffness of the air spring assembly before closing the isolation valve is greater than 1.7.

[0055] In some embodiments, Figure 2 As shown, the valve plate includes multiple movable valve plate units 53. The valve plate is composed of multiple valve plate units 53. The multiple valve plate units 53 can control the opening and closing of the valve port by moving a small distance respectively, which is beneficial to improving the response speed of the isolation valve 5 and reducing the volume of the isolation valve 5.

[0056] In some embodiments, Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a linear guide structure is provided between the multi-valve unit 53 and the valve body to guide the multi-valve unit 53 to move linearly along multiple radial directions of the valve port. By providing the linear guide structure, the moving path of the multi-valve unit 53 can be accurately controlled, which is conducive to ensuring the performance of the isolation valve 5 and also provides a basis for the linkage of the multi-valve unit 53.

[0057] In some embodiments, Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the valve body is provided with a plurality of strip guide grooves 521, each of which is extended in a plurality of radial directions of the valve port, and the plurality of valve plate units 53 are provided with guide portions 531, and the plurality of guide portions 531 are respectively matched with the plurality of strip guide grooves 521 to respectively form a plurality of linear guide structures. As a specific embodiment, the guide portions 531 on the valve plate unit 53 are rectangular or cubic protrusions provided on the valve plate unit 53. As a preferred embodiment, the plurality of strip guide grooves 521 are arranged at equal intervals in the circumferential direction of the valve port.

[0058] In some embodiments, Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 As shown, the isolation valve 5 further includes a linkage ring 54, and a driving structure is disposed between the multiple valve plate units 53 and the linkage ring 54. The multiple driving structures are used to respectively drive the multiple valve plate units 53 when the linkage ring 54 rotates, so that the multiple valve plate units 53 move linearly along multiple radial directions of the valve port. By providing the linkage ring 54, the multiple valve plate units 53 can share a driving motor 61.

[0059] In some embodiments, Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the linkage ring 54 is provided with a plurality of strip-shaped push grooves 541, the lengths of which are gradually extended inwardly along one direction of the circumference of the valve port, or the lengths of which are gradually extended outwardly along one direction of the circumference of the valve port, and the plurality of valve plate units 53 are provided with matching parts 532, which are respectively matched with the plurality of strip-shaped push grooves 541 to respectively form a plurality of push structures. When the linkage ring 54 rotates forward, the strip-shaped push grooves 541 can apply thrust to the matching parts 532 to push the valve plate unit 53 to move in one direction of the corresponding strip-shaped guide groove 521, and when the linkage ring 54 rotates reversely, the strip-shaped push grooves 541 can apply thrust to the matching parts 532 to push the valve plate unit 53 to move in another direction of the corresponding strip-shaped guide groove 521, thereby realizing the control of the valve plate unit 53 to move back and forth along the strip-shaped guide groove 521. As a specific embodiment, the matching portion 532 is a cylindrical protrusion provided on the valve plate unit 53. In specific implementation, by reasonably designing the radial span and circumferential span of both ends of the strip-shaped pushing groove 541, the required opening and closing speed of the valve plate unit 53 can be obtained.

[0060] In some embodiments, Figure 5 , Figure 8 and Fig. 9 As shown, multiple valve sheet units 53 are sequentially arranged in the circumferential direction of the valve port, and a first sealing groove 535 is arranged on one of the two splicing edges for splicing each other between two adjacent valve sheet units 53, and a first sealing portion 534 is arranged on the other of the two splicing edges for splicing each other between two adjacent valve sheet units 53. When the valve port is closed, the first sealing portion 534 and the first sealing groove 535 corresponding thereto are engaged to form a seal. The first sealing portion 534 and the first sealing groove 535 can be provided to improve the sealing performance between the valve sheet units 53, which is conducive to improving the ability of the valve sheet to separate the airbag 3 and the air chamber when the valve port is closed.

[0061] In some embodiments, the first sealing groove 535 is a V-shaped groove, and the first sealing portion 534 is configured to be a wedge-shaped structure that matches the shape of the first sealing groove 535. By properly configuring the shapes of the first sealing groove 535 and the first sealing portion 534, when there is a pressure difference between the upper and lower surfaces of the valve plate, the inclined surface of the first sealing groove 535 and the inclined surface of the first sealing portion 534 are pressed tightly, thereby forming a good seal.

[0062] In some embodiments, Figure 1 , Figure 8 and Fig. 9As shown, the air spring assembly further includes a shock absorber 1, the valve body surrounds the outer periphery of the shock absorber 1, and the gap between the valve body and the shock absorber 1 constitutes a valve port. The provision of the shock absorber 1 is helpful in reducing the difficulty of arranging the air chamber. Obviously, in other embodiments, the air spring assembly may not be provided with the shock absorber 1.

[0063] In some embodiments, Figure 8 , Fig. 9 , Fig.11 and Fig.12 As shown, the shock absorber 1 is provided with a sealing ring 55, and the outer side of the sealing ring 55 is provided with a second sealing groove 551, and the edges of the multi-piece valve plate unit 53 on the side close to the sealing ring 55 are all provided with a second sealing portion 533, and when the valve port is closed, the multiple second sealing portions 533 are all embedded in the second sealing groove 551 to form a seal. By providing the sealing ring 55, on the one hand, the sealing performance between the valve plate unit 53 and the shock absorber 1 can be improved, and on the other hand, the sealing ring 55 can play a buffering role for the multi-piece valve plate unit 53, which is conducive to reducing noise and ensuring the service life of the valve plate unit 53.

[0064] In some embodiments, Figure 8 , Fig. 9 , Fig.11 and Fig.12 As shown, the second sealing groove 551 is a V-shaped groove, and the plurality of second sealing portions 533 are all configured to be wedge-shaped structures that match the shape of the second sealing groove 551. By properly configuring the shapes of the second sealing groove 551 and the second sealing portion 533, when there is a pressure difference between the upper and lower surfaces of the valve plate, the inclined surface of the second sealing groove 551 and the inclined surface of the second sealing portion 533 are pressed tightly, thereby forming a good seal.

[0065] In some embodiments, Figure 1 As shown, the periphery of the shock absorber 1 is fixedly connected with an air chamber housing 4, and the air chamber housing 4 and the outer wall of the shock absorber 1 form an air chamber. Arranging the air chamber at the periphery of the shock absorber 1 can save space on the one hand, and facilitate the direct connection between the air chamber and the airbag 3 on the other hand.

[0066] In a specific embodiment, the air chamber shell 4 is made of a rigid material, and the air chamber shell 4 and the shock absorber 1 form a rigid air chamber. The rigid air chamber shell 4 can be used to support the airbag 3.

[0067] In a specific embodiment, Figure 1As shown, the shock absorber 1 includes a shock absorber cylinder, a shock absorber piston, a shock absorber piston rod and an upper mounting seat 2, the upper mounting seat 2 is connected to the upper end of the shock absorber piston rod, the lower end of the air chamber shell 4 is welded to the periphery of the shock absorber cylinder, the upper end of the airbag 3 is connected to the periphery of the upper mounting seat 2, the lower end of the airbag 3 is connected to the periphery of the upper end of the air chamber shell 4, and the lower end of the airbag 3 is directly connected to the upper end of the air chamber shell 4, which is beneficial to improving the response speed of adjusting the stiffness of the air spring assembly.

[0068] In some embodiments, Figure 1 As shown, the isolation valve 5 is installed at the upper end of the air chamber housing 4. Specifically, as Figures 1 to 12 As shown, the isolation valve 5 includes the above-mentioned valve body, multiple valve plate units 53 and a linkage ring 54, the valve body includes a pressure ring 51 and a base 52, multiple strip guide grooves 521 are all arranged on the base 52, the pressure ring 51 includes a pressure ring body 511 fixedly connected to the outer periphery of the upper end of the air chamber shell 4 and a pressure ring inner flange 512 arranged on the inner side of the pressure ring body 511, the connection method between the pressure ring body 511 and the air chamber shell 4 can be threaded connection, interference fit press fitting and welding, the base 52 is clamped between the pressure ring inner flange 512 and the upper end surface 41 of the air chamber shell 4, a step surface 43 for supporting the linkage ring 54 is arranged in the air chamber shell 4, the linkage ring 54 is rotatably supported on the step surface 43, and multiple valve plate units 53 can be movably clamped between the lower side surface of the base 52 and the upper side surface of the linkage ring 54. As a preferred embodiment, the pressure ring 51, the base 52 and the linkage ring 54 are all annular structures, the pressure ring 51 surrounds the pressure ring center hole 513, the base 52 surrounds the base center hole 522, and the linkage ring 54 surrounds the linkage ring center hole 543. The pressure ring center hole 513, the base center hole 522 and the linkage ring center hole 543 constitute a valve port, and the multiple valve plate units 53 extend into the valve port and are spliced ​​together to close the valve port; the multiple valve plate units 53 exit the valve port to open the valve port. It should be noted that the present application reasonably arranges the structure, linear guide structure and pushing structure of the multiple valve plate units 53, so that the multiple valve plate units 53 move linearly along multiple radial directions of the valve port to open and close the valve port, which on the one hand ensures that the valve port can be opened and closed quickly, and on the other hand provides convenience for setting a sealing structure between the valve plate units 53, and for setting a sealing structure between the valve plate units 53 and the shock absorber 1, which can prevent interference between the valve plate units 53 and the shock absorber 1.

[0069] In some embodiments, Figure 1 and Fig.13As shown, a driving motor 61 for driving the isolation valve 5 to open and close is provided in the air chamber, and the driving motor 61 can be a servo motor. In specific implementation, the driving motor 61 can be fixedly installed in the air chamber cavity 8 through a mounting bracket 63, and the mounting bracket 63 can be welded on the shock absorber. A gear 62 is installed on the output shaft of the driving motor 61, and an inner gear ring 542 is provided on the linkage ring 54. Fig.10 As shown, the gear 62 is meshed with the inner gear ring 542, and the driving motor 61 drives the linkage ring 54 to rotate forward and reverse, thereby driving the isolation valve 5 to open and close. Fig.14 As shown, the wire harness 64 of the drive motor 61 can pass through the air chamber housing 4 through the wire harness through hole 42 on the air chamber housing 4, and a seal 65 can be provided on the wire harness 64 and the wire harness through hole 42, and the seal 65 can be a rubber plug. The drive motor 61, the gear 62, the mounting bracket 63, the wire harness 64 and the seal 65 constitute the motor assembly 6.

[0070] In some embodiments, the gear 62 is made of nylon to reduce vibration and rotational inertia.

[0071] In some embodiments, the valve unit 53 is made of nylon to reduce the inertia of the valve unit 53 and the impact when the valve unit 53 is opened and closed, thereby improving the response speed.

[0072] In some embodiments, applying grease on the surfaces of the valve plate unit 53 and the linkage ring 54 can reduce friction and eliminate noise.

[0073] An automobile of the present invention comprises any of the above-mentioned air spring assemblies and a controller for controlling the opening and closing of the isolation valve 5. The controller is connected to the CAN line of the automobile, and collects automobile operation information through the CAN line of the automobile. The automobile operation information includes but is not limited to a vehicle speed signal, a steering wheel angle signal, a vehicle brake deceleration signal, a vehicle lateral acceleration signal, and a brake light switch signal. The controller calculates and compares each signal and each pre-stored threshold value, converts the calculation and comparison results into an angular displacement signal on the output shaft of the servo motor to control the rotation of the servo motor, and determines the opening and closing state of the isolation valve 5 by monitoring the angle signal of the servo motor. Specifically, the controller can obtain the lateral acceleration of the vehicle, and the controller can obtain the braking deceleration of the vehicle; the controller can control the isolation valve 5 to close in response to the lateral acceleration of the vehicle being greater than or equal to a preset lateral acceleration threshold value, so as to disconnect the airbag 3 and the air chamber; the controller can control the isolation valve 5 to close in response to the braking deceleration of the vehicle being greater than or equal to a preset braking deceleration threshold value, so as to disconnect the airbag 3 and the air chamber; after controlling the isolation valve 5 to close, the controller can monitor the steering wheel angle and brake light status of the vehicle, and the controller can control the isolation valve 5 to open in response to the steering wheel angle being less than the preset steering wheel angle threshold value and the brake light status being off, so as to connect the airbag 3 and the air chamber.

[0074] In a specific embodiment, the controller includes at least one processor and at least one memory coupled to the at least one processor, the memory storing instructions executable by the at least one processor, and the instructions performing the following steps when executed by the at least one processor: obtaining the lateral acceleration of the vehicle and obtaining the braking deceleration of the vehicle; in response to the lateral acceleration of the vehicle being greater than or equal to a preset lateral acceleration threshold, controlling the isolation valve 5 to close so that the airbag 3 and the air chamber are disconnected; in response to the braking deceleration of the vehicle being greater than or equal to a preset braking deceleration threshold, controlling the isolation valve 5 to close so that the airbag 3 and the air chamber are disconnected; after controlling the isolation valve 5 to close, monitoring the steering wheel angle and brake light status of the vehicle, and in response to the steering wheel angle being less than the preset steering wheel angle threshold and the brake light status being off, controlling the isolation valve 5 to open so that the airbag 3 and the air chamber are connected.

[0075] By adopting the above scheme, the opening and closing of the isolation valve 5 are both at the beginning and after the end of the vehicle's roll and pitch. Therefore, there will be no pressure difference between the upper and lower surfaces of the valve unit 53 during opening and closing, which can ensure that the valve unit 53 has flexible opening and closing responses and reliable operation, thus providing convenience for the use of the valve plate type isolation valve 5.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics combined with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

Claims

1. An air spring assembly, characterized in that: The invention comprises an air spring, an air chamber and an isolation valve, wherein the isolation valve is arranged between the air bag of the air spring and the air chamber, and the isolation valve is used to control the on-off of the air bag and the air chamber; the isolation valve comprises a valve body provided with a valve port and a valve sheet used to open and close the valve port, when the valve port is opened, the valve port connects the air bag and the air chamber, and when the valve port is closed, the isolation valve separates the air bag and the air chamber; The valve plate includes a plurality of movable valve plate units; A linear guide structure is provided between the plurality of valve sheet units and the valve body to guide the plurality of valve sheet units to move linearly along a plurality of radial directions of the valve port; The air spring assembly further includes a shock absorber, the valve body surrounds the outer periphery of the shock absorber, and the gap between the valve body and the shock absorber constitutes the valve port.

2. The air spring assembly according to claim 1, characterized in that: The air chamber is a rigid air chamber.

3. The air spring assembly according to claim 2, characterized in that: The volume ratio of the air chamber and the airbag is not less than 1 / 4.

4. The air spring assembly according to claim 3, characterized in that: The volume ratio of the air chamber to the airbag is not less than 2 / 3 and not more than 1.

5. The air spring assembly according to claim 1, characterized in that: The valve body is provided with a plurality of strip guide grooves extending in a plurality of radial directions of the valve port, and a plurality of valve sheet units are provided with guide parts, and the plurality of guide parts respectively cooperate with the plurality of strip guide grooves to respectively constitute a plurality of the linear guide structures.

6. The air spring assembly according to claim 1, characterized in that: The isolation valve also includes a linkage ring, and a pushing structure is arranged between the multiple valve sheet units and the linkage ring. The multiple pushing structures are used to push the multiple valve sheet units respectively when the linkage ring rotates, so that the multiple valve sheet units can move linearly along multiple radial directions of the valve port respectively.

7. The air spring assembly according to claim 6, characterized in that: A plurality of strip push grooves are arranged on the linkage ring, and the lengths of the plurality of strip push grooves are gradually extended inward or outward along one direction of the circumference of the valve port, and a matching part is arranged on the plurality of valve sheet units, and the plurality of matching parts are respectively matched with the plurality of strip push grooves to respectively constitute a plurality of the push structures.

8. The air spring assembly according to claim 1, characterized in that: Multiple valve plate units are arranged in sequence on the circumference of the valve port, a first sealing groove is arranged on one of the two splicing edges between two adjacent valve plate units, and a first sealing portion is arranged on the other of the two splicing edges between two adjacent valve plate units. When the valve port is closed, the first sealing portion and the first sealing groove corresponding thereto are engaged to form a seal.

9. The air spring assembly according to claim 8, characterized in that: The first sealing groove is a V-shaped groove, and the first sealing portion is configured as a wedge-shaped structure matching the shape of the first sealing groove.

10. The air spring assembly according to claim 1, characterized in that: A sealing ring is mounted on the shock absorber, and a second sealing groove is arranged on the outer side of the sealing ring. Second sealing parts are arranged on the edges of the plurality of valve plate units on the side close to the sealing ring. When the valve port is closed, the plurality of second sealing parts are embedded in the second sealing groove to form a seal.

11. The air spring assembly according to claim 10, characterized in that: The second sealing groove is a V-shaped groove, and the plurality of second sealing portions are all configured to be a wedge-shaped structure matching the shape of the second sealing groove.

12. The air spring assembly according to claim 1, characterized in that: An air chamber shell is fixedly connected to the periphery of the shock absorber, and the air chamber shell and the outer wall of the shock absorber form the air chamber.

13. The air spring assembly according to claim 12, characterized in that: The isolation valve is mounted on the upper end of the air chamber housing.

14. The air spring assembly according to claim 1, characterized in that: A driving motor for driving the isolation valve to open and close is arranged in the air chamber.

15. A car, characterized in that: The invention comprises the air spring assembly according to any one of claims 1 to 14 and a controller for controlling the opening and closing of the isolation valve.

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