Suspension system, control method and vehicle based on active steering lift bridge

Abstract

The application discloses a suspension system based on an active steering lifting bridge, a control method and a vehicle. The suspension system comprises an active steering lifting bridge, a mounting support assembly, a gas supply mechanism and a control mechanism. The mounting support assembly comprises a front air bag assembly, a rear air bag assembly, a turnover assembly and a connecting arm assembly. The connecting arm assembly is fixed at the top of the active steering lifting bridge, and one end of the connecting arm assembly is fixedly connected with the bottom of the rear air bag assembly, and the other end of the connecting arm assembly is hingedly connected with the turnover assembly. The turnover assembly is fixedly connected with the two sides of the front air bag assembly. The top of the front air bag assembly and the top of the rear air bag assembly are fixedly connected with a vehicle frame respectively. The application can solve the problem of the minimum turning diameter of a long wheelbase vehicle, and make the active steering lifting bridge retractable and deployable according to working conditions, so that the technical problems of poor consistency of the suspension and the ground, reduced service life of parts and influence on the comfort of the whole vehicle are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a suspension system based on an active steering lifting axle, a control method and a vehicle. Background Art

[0002] Currently, a common method for reducing the turning diameter of long-wheelbase vehicles (such as 8x4m trucks) is to add active steering to the rear wheels and secure them to the vehicle frame using a fixed suspension. For example, the "Active Steering Lifting Axle Air Suspension," disclosed in Chinese Utility Model Patent No. CN200420057827.8, shifts the vehicle's turning center forward, significantly reducing the minimum turning diameter of long-wheelbase vehicles and improving overall vehicle maneuverability. However, the suspension used with active steering in these prior art systems is fixed, and its height differs from that of the rest of the vehicle's suspension. When the active steering system moves with the vehicle, especially when navigating uneven roads, the contact consistency between this suspension and the rest of the suspension with the ground becomes poor, resulting in impact stress during use, which reduces component life and affects vehicle comfort. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a suspension system, control method and vehicle based on an active steering lifting axle. On the basis of solving the problem of the minimum turning diameter of long-wheelbase vehicles, the active steering lifting axle can be retracted and lowered according to the working conditions. In this way, when the active rotation function is not needed, it is retracted and has no contact with the ground, which solves the technical problems in the prior art that the consistency of the suspension contact with the ground is poor, and the impact stress generated will reduce the life of parts and affect the comfort of the entire vehicle.

[0004] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0005] In a first aspect, the present invention provides a suspension system based on an active steering lifting axle, comprising:

[0006] Active steering lift axle;

[0007] A mounting bracket assembly includes a front airbag assembly, a rear airbag assembly, a flip assembly, and a connecting arm assembly. The connecting arm assembly is fixed to the top of the active steering lifting bridge, and one end of the connecting arm assembly is fixedly connected to the bottom of the rear airbag assembly, and the other end is hinged to the flip assembly. The flip assembly is fixedly connected to both sides of the front airbag assembly. The tops of the front airbag assembly and the rear airbag assembly are respectively fixedly connected to the vehicle frame;

[0008] An air supply mechanism and a control mechanism, wherein the air supply mechanism is communicated with the front airbag assembly and the rear airbag assembly respectively, and the control mechanism is connected with the air supply mechanism and the active steering lifting bridge signal respectively.

[0009] In some embodiments, the front airbag assembly includes a first fixing bracket, a second fixing bracket, a hanger, a crossbeam and a front airbag, the first fixing bracket and the second fixing bracket are fixed at both ends of the hanger, and the tops of the first fixing bracket and the second bracket are respectively fixed to the vehicle frame, the outer sides of the first fixing bracket and the second fixing bracket are respectively hinged to the flip assembly, the two ends of the crossbeam are respectively fixed on the two flip assemblies, the front airbag is arranged between the hanger and the crossbeam and the two ends are respectively fixedly connected to the hanger and the crossbeam.

[0010] In some embodiments, the front airbag assembly further includes a first connecting plate and a second connecting plate, wherein the two ends of the first connecting plate are respectively connected to the first fixing bracket and one end of the hanger, and the two ends of the second connecting plate are respectively connected to the second fixing bracket and the other end of the hanger.

[0011] In some embodiments, the rear airbag assembly includes a first mounting bracket, a second mounting bracket, a connecting beam and a rear airbag, the first mounting bracket and the second mounting bracket are symmetrically fixed on both sides of the bottom of the frame, the tops of the two rear airbags are respectively connected to the bottoms of the first mounting bracket and the second mounting bracket, the two ends of the connecting beam are respectively connected to the two rear airbags, and the bottoms of the two rear airbags are respectively fixedly connected to the connecting arm assembly.

[0012] In some embodiments, the flip assembly includes a first flip plate and a second flip plate, the first flip plate is fixed to the outer side of the first fixed bracket, the second flip plate is fixed to the outer side of the second fixed bracket, and the first flip plate and the second flip plate are fixedly connected at both ends of the beam.

[0013] In some embodiments, the connecting arm assembly includes a first connecting arm assembly and a second connecting arm assembly, wherein:

[0014] The first connecting arm assembly includes a first connecting rod and a first fixing seat, one end of the first connecting rod is hinged to the first flap, and the other end is fixedly connected to one of the rear airbags, the first fixing seat is mounted on the first connecting rod, and the bottom of the first fixing seat is fixedly connected to the active steering lifting bridge;

[0015] The second connecting arm assembly includes a second connecting rod and a second fixed seat, one end of the second connecting rod is hinged to the second flap, and the other end is fixedly connected to another of the rear airbags, the second fixed seat is installed on the second connecting rod, and the bottom of the second fixed seat is fixedly connected to the active steering lifting bridge.

[0016] In some embodiments, the mounting bracket assembly also includes a steering gear fixing assembly, which includes a first surrounding beam, a second surrounding beam, a third surrounding beam, a front side beam, a rear side beam and a connecting beam. The first surrounding beam, the second surrounding beam and the third surrounding beam constitute an installation space, and the installation space is located on the inner side of the second connecting rod. The front side beam is fixed to the side of the third surrounding beam, and the rear side beam is fixed to the side of the first surrounding beam. The connecting beam is respectively arranged at both ends of the top of the front side beam and the rear side beam, and is used to fix the steering gear fixing assembly to the frame.

[0017] In some embodiments, the active steering lifting axle includes a steering gear, a dowel rod assembly, and a steering axle assembly. The steering gear is fixedly mounted on the steering axle assembly, the steering gear is drivingly connected to the dowel rod assembly, and the dowel rod assembly is rotatably connected to one end of the steering axle assembly. The steering axle assembly achieves active steering under the drive of the steering gear through the dowel rod assembly.

[0018] Wherein, the steering axle assembly is fixedly connected to the bottom of the connecting arm assembly.

[0019] In a second aspect, the present invention provides a suspension system control method based on an active steering lifting axle, which is used to control the suspension system based on the active steering lifting axle described in the first aspect of the present invention, comprising the following steps:

[0020] The air supply mechanism is controlled by the control mechanism to supply air to the front airbag assembly and the rear airbag assembly of the mounting bracket assembly respectively, so that the active steering lifting bridge is lowered or retracted around the flip assembly under the drive of the connecting arm assembly;

[0021] The active steering lifting axle is steered or returned to its original position by a control mechanism.

[0022] In a third aspect, the present invention provides a vehicle comprising the suspension system based on the active steering lifting axle according to the first aspect of the present invention.

[0023] Compared with the prior art, the present invention provides a suspension system, control method, and vehicle based on an active steering lifting axle. When active steering is required, the control mechanism controls the air supply mechanism to inflate the rear airbag assembly, which allows the active steering lifting axle to rotate around the flip assembly driven by the connecting arm assembly and then lower it to contact the ground. At the same time, the control mechanism controls the active steering lifting axle to steer. When the active steering function is not required, the control mechanism controls the air supply mechanism to inflate the front airbag assembly, which allows the active steering lifting axle to rotate around the flip assembly driven by the connecting arm assembly and then lift it off the ground. At the same time, the control mechanism controls the active steering lifting axle to return it to its original position. Therefore, when the steering function is not used as the vehicle moves, the present invention hides the active steering lifting axle at the bottom of the frame and has no contact with the ground. This effectively avoids the problem of poor consistency in the contact between the suspension and the ground in the prior art, reduces impact stress, thereby ensuring the service life of components and improving the comfort of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the suspension system of the present invention installed on a vehicle frame;

[0025] Figure 2 yes Figure 1 A partial enlarged view of

[0026] Figure 3 is a schematic structural diagram of the suspension system of the present invention;

[0027] Figure 4 is a structural schematic diagram of the mounting bracket assembly of the present invention;

[0028] Figure 5 is a structural diagram of the first fixing bracket of the present invention;

[0029] Figure 6 is a structural diagram of the second fixing bracket of the present invention;

[0030] Figure 7 It is a structural diagram of the hanger of the present invention;

[0031] Figure 8 It is a structural diagram of the crossbeam of the present invention;

[0032] Figure 9 is a structural diagram of the front airbag of the present invention;

[0033] Figure 10 is a structural diagram of the first connecting plate of the present invention;

[0034] Figure 11 is a structural diagram of the second connecting plate of the present invention;

[0035] Figure 12is a structural diagram of the connecting beam of the present invention;

[0036] Figure 13 is a structural diagram of the rear airbag of the present invention;

[0037] Figure 14 is a structural diagram of the first flap of the present invention;

[0038] Figure 15 is a structural diagram of the second flap of the present invention;

[0039] Figure 16 is a structural diagram of the first connecting arm assembly of the present invention;

[0040] Figure 17 is a structural diagram of the second connecting arm assembly of the present invention;

[0041] Figure 18 It is a structural diagram of the third surrounding beam of the present invention;

[0042] Figure 19 is a structural diagram of the front side beam of the present invention;

[0043] Figure 20 It is a structural diagram of the rear measuring beam of the present invention;

[0044] Figure 21 This is a schematic structural diagram of the active steering lifting axle of the present invention;

[0045] Figure 22 is a general flow chart of the suspension system control method of the present invention;

[0046] Figure 23 It is a detailed flow chart of the suspension system control method of the present invention.

[0047] The following are the descriptions of the reference numerals:

[0048] 100, active steering lifting axle, 110, steering gear, 120, dowel rod assembly, 130, steering axle assembly;

[0049] 200, mounting bracket assembly, 210, front airbag assembly, 211, first fixing bracket, 212, second fixing bracket, 213, hanger, 214, crossbeam, 215, front airbag, 216, first connecting plate, 217, second connecting plate, 220, rear airbag assembly, 221, first mounting bracket, 222, second mounting bracket, 223, connecting beam, 224, rear airbag, 230, flip assembly, 231, first flip assembly Plate, 231, second flap, 240, connecting arm assembly, 241, first connecting arm assembly, 2411, first connecting rod, 2412, first fixing seat, 242, second connecting arm assembly, 2421, second connecting rod, 2422, second fixing seat, 250, steering gear fixing assembly, 251, first surrounding beam, 252, second surrounding beam, 253, third surrounding beam, 254, front side beam, 255, rear side beam, 256, connecting plate;

[0050] 300, frame;

[0051] 400, rear axle and suspension assembly;

[0052] 500, mid-bridge and suspension assembly;

[0053] 600, second steering axle and suspension assembly;

[0054] 700. First steering axle and suspension assembly. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0056] Figure 1 This is a schematic diagram of the chassis frame structure of an 8*4m truck. Figure 1 As shown, the chassis frame of such a long-wheelbase vehicle generally includes a first steering axle and suspension assembly 700, a second steering axle and suspension assembly 600, a middle axle and suspension assembly 500, a rear axle and suspension assembly 400, and a frame 300. The first steering axle and suspension assembly 700, the second steering axle and suspension assembly 600, the middle axle and suspension assembly 500, and the rear axle and suspension assembly 400 are sequentially arranged on the frame 300 from front to back. To reduce the turning diameter, existing solutions often add an active steering device and a supporting suspension to the rear axle and suspension assembly 400 of such a long-wheelbase vehicle. However, such a suspension is fixed. When steering is not required, the active steering device and the supporting suspension are at a different height from the other suspensions of the vehicle. This results in poor consistency in ground contact during vehicle movement, resulting in significant impact stress, which reduces the service life of components and affects the comfort of the vehicle.

[0057] In response to the above technical problems, on the first aspect, this embodiment relates to a suspension system based on an active steering lifting axle. The design concept is to lower or retract the suspension that is matched with the active steering device in the prior art. However, since the active steering device and the suspension are in a corresponding relationship, the active steering device also needs to be redesigned when the suspension is redesigned. That is, the main design structure of the suspension system described in this embodiment includes an active steering lifting axle 100 and a mounting bracket assembly 200 (the mounting bracket assembly 200 is essentially a suspension that matches the active steering lifting axle 100).

[0058] like Figure 1-3 As shown, the suspension system based on the active steering lifting axle provided in this embodiment includes an active steering lifting axle 100, a mounting bracket assembly 200, an air supply mechanism and a control mechanism, wherein the mounting bracket assembly 200 includes a front airbag assembly 210, a rear airbag assembly 220, a flip assembly 230 and a connecting arm assembly 240, wherein the connecting arm assembly 240 is fixed on the top of the active steering lifting axle 100, and one end is fixedly connected to the bottom of the rear airbag assembly 220, and the other end is hinged to the flip assembly 230, and the flip assembly 230 is fixedly connected to both sides of the front airbag assembly 210, and the tops of the front airbag assembly 210 and the rear airbag assembly 220 are respectively fixedly connected to the vehicle frame 300; the air supply mechanism is respectively connected to the front airbag assembly 210 and the rear airbag assembly 220, and the control mechanism is respectively connected to the air supply mechanism and the active steering lifting axle 100 for signals.

[0059] In this embodiment, the suspension system as a whole is arranged on the frame 300 located behind the rear axle and the suspension assembly 400. When the active steering function needs to be used, the control mechanism controls the air supply mechanism to inflate the rear airbag assembly 220, so that the active steering lifting bridge 100 can move downward around the flip assembly 230 under the drive of the connecting arm assembly 240 until it contacts the ground. At the same time, the active steering lifting bridge 100 is controlled by the control mechanism to steer; when the active steering function is not needed, the control mechanism controls the air supply mechanism to inflate the front airbag assembly 210, so that the active steering lifting bridge 100 can move around the flip assembly 230 under the drive of the connecting arm assembly 240, so that the active steering lifting bridge 100 is lifted off the ground and retracted. At the same time, the control mechanism controls the active steering lifting bridge 100 to return to the center. In this way, when the steering function is not used during the movement of the entire vehicle, the active steering lifting axle of the present invention is hidden at the bottom of the frame and has no contact with the ground, effectively avoiding the problem of poor consistency in contact between the suspension and the ground in the prior art, reducing impact stress, thereby ensuring the service life of components and improving the comfort of the entire vehicle.

[0060] The specific structure of the suspension system based on the active steering lifting axle described in this embodiment is described in detail below.

[0061] In one embodiment, Figure 4 As shown (and combined with Figure 5-Figure 11 ), the front airbag assembly 210 includes a first fixed bracket 211, a second fixed bracket 212, a hanger 213, a crossbeam 214 and a front airbag 215, the first fixed bracket 211 and the second fixed bracket 212 are fixed at both ends of the hanger 213, and the tops of the first fixed bracket 211 and the second fixed bracket 212 are respectively fixed to the vehicle frame 300, the outer sides of the first fixed bracket 211 and the second fixed bracket 212 are respectively hinged to the flip assembly 230, the two ends of the crossbeam 214 are respectively fixed on the two flip assemblies 230, the front airbag 215 is arranged between the hanger 213 and the crossbeam 214, and the two ends are respectively fixedly connected to the hanger 213 and the crossbeam 214.

[0062] In one embodiment, the front airbag assembly 210 further includes a first connecting plate 216 and a second connecting plate 217, wherein the two ends of the first connecting plate 216 are respectively connected to the first fixed bracket 211 and one end of the hanger 213, and the two ends of the second connecting plate 217 are respectively connected to the second fixed bracket 212 and the other end of the hanger 213.

[0063] In this embodiment, the air pipe of the air supply mechanism is connected to the front airbag 215. When the air supply mechanism is controlled by the control mechanism to inflate the front airbag 215, the crossbeam 214 can be pushed to move downward around the flip assembly 230, thereby driving the active steering lifting bridge 100 to move downward.

[0064] In one embodiment, Figure 4 and combined Figure 12-13 As shown, the rear airbag assembly 220 includes a first mounting bracket 221, a second mounting bracket 222, a connecting beam 223 and a rear airbag 224. The first mounting bracket 221 and the second mounting bracket 222 are symmetrically fixed on both sides of the bottom of the frame 300. The tops of the two rear airbags 224 are respectively connected to the bottoms of the first mounting bracket 221 and the second mounting bracket 222. The two ends of the connecting beam 223 are respectively connected to the two rear airbags 224, and the bottoms of the two rear airbags 224 are respectively fixedly connected to the connecting arm assembly 240.

[0065] In this embodiment, the air pipe of the air supply mechanism is connected to the rear airbag 224. When the air supply mechanism is controlled by the control mechanism to inflate the two rear airbags 224, the connecting arm assembly 240 can move downward around the flip assembly 230, thereby causing the previously lowered active steering lifting bridge 100 to be retracted upward.

[0066] In one embodiment, Figure 4 and combined Figure 15-16 As shown, the flip assembly 230 includes a first flip plate 231 and a second flip plate 232, the first flip plate 231 is fixed to the outer side of the first fixed bracket 211, the second flip plate 232 is fixed to the outer side of the second fixed bracket 212, and the first flip plate 231 and the second flip plate 232 are fixedly connected at both ends of the beam 214.

[0067] In one embodiment, Figure 4 and combined Figure 16-17 As shown, the connecting arm assembly 240 includes a first connecting arm assembly 241 and a second connecting arm assembly 242, wherein:

[0068] The first connecting arm assembly 241 includes a first connecting rod 2411 and a first fixed seat 2412. One end of the first connecting rod 2411 is hinged to the first flap 231, and the other end is fixedly connected to one of the rear airbags 224. The first fixed seat 2412 is installed on the first connecting rod 2411, and the bottom of the first fixed seat 2412 is fixedly connected to the active steering lifting bridge 100.

[0069] The second connecting arm assembly 242 includes a second connecting rod 2421 and a second fixed seat 2422, one end of the second connecting rod 2421 is hinged to the second flap 232, and the other end is fixedly connected to another of the rear airbags 224, the second fixed seat 2422 is installed on the second connecting rod 2421, and the bottom of the second fixed seat 2422 is fixedly connected to the active steering lifting bridge 100.

[0070] In one embodiment, Figure 4 and combined Figure 17-20 As shown, the mounting bracket assembly 200 also includes a steering gear fixing assembly 250, and the steering gear fixing assembly 250 includes a first surrounding beam 251, a second surrounding beam 252, a third surrounding beam 253, a front side beam 254, a rear side beam 255 and a connecting plate 256. The first surrounding beam 251, the second surrounding beam 252 and the third surrounding beam 253 constitute an installation space, and the installation space is located on the inner side surface of the second connecting rod 2421. The front side beam 254 is fixed to the side of the third surrounding beam 253, and the rear side beam 255 is fixed to the side of the first surrounding beam 251. The connecting plates 256 are respectively arranged at both ends of the top of the front side beam 254 and the rear side beam 255, and are used to fix the steering gear fixing assembly 250 to the frame 300.

[0071] In one embodiment, Figure 21As shown, the active steering lifting axle 100 includes a steering gear 110, a dowel rod assembly 120 and a steering axle assembly 130. The steering gear 110 is fixedly mounted on the steering axle assembly 130. The steering gear 110 is driven and connected to the dowel rod assembly 120. The dowel rod assembly 120 is rotatably connected to one end of the steering axle assembly 130. The steering axle assembly 130 realizes active steering through the dowel rod assembly 120 under the drive of the steering gear 110, wherein the steering axle assembly 130 is fixedly connected to the bottom of the connecting arm assembly 240.

[0072] In this embodiment, the steering gear 110 is an electric steering gear commonly used in the art, and the dowel rod assembly 120 is a connecting rod structure commonly used in the art. The structures of the dowel rod assembly 120 and the steering axle assembly 130 are described in the appendix of the specification. Figure 21 The steering gear 110 is mounted in the steering gear fixing assembly 250, and the steering axle assembly 130 is fixed to the bottom of the connecting arm assembly 240. Thus, when the connecting arm assembly 240 is driven to move by the inflation of the front airbag assembly 210 or the rear airbag assembly 220, it can drive the steering axle assembly 130 to move synchronously, achieving the lowering and retracting action. At the same time, the control mechanism controls the steering gear 110 to drive the force transmission rod assembly 120 to move, thereby achieving the steering and return of the steering axle assembly 130.

[0073] Second, as Figure 22 As shown, this embodiment also provides a suspension system control method based on active steering lifting axle, comprising the following steps:

[0074] S1, controlling the air supply mechanism through the control mechanism to supply air to the front airbag assembly 210 and the rear airbag assembly 220 of the mounting bracket assembly 200, respectively, so that the active steering lifting bridge 100 is lowered or retracted around the flip assembly 230 under the drive of the connecting arm assembly 240;

[0075] S2, controlling the active steering lifting axle 100 to turn or return to the center position through the control mechanism.

[0076] In one embodiment, the control method further includes: acquiring a current rotation angle of the vehicle and transmitting the obtained angle to the control mechanism, wherein the control mechanism controls the active steering lifting axle 100 to rotate according to the current rotation angle.

[0077] In one embodiment, the control method further includes: setting a switch button in the cab for controlling the lowering and retracting (lifting) of the mounting bracket assembly 200 , and setting a switch button for controlling the starting and shutting down of the steering machine 110 .

[0078] In one embodiment, the control method further includes: after the vehicle is ignited, the system automatically detects whether there is a fault in the steering gear 110. If there is a fault, the active steering lifting bridge 100 is forcibly lifted, and the switch button is locked.

[0079] In one embodiment, the control method further includes: before lowering the active steering lifting axle 100, it is necessary to determine the vehicle speed, and when the vehicle speed is less than 20 km / h, the active steering lifting axle 100 is allowed to be lowered to use the active steering function.

[0080] In a third aspect, this embodiment further provides a vehicle, comprising the suspension system based on the active steering lifting axle provided in the first aspect of this embodiment.

[0081] like Figure 23 As shown, the control process of the suspension system based on the active steering lifting axle provided in this embodiment is as follows:

[0082] After the vehicle is ignited, the system automatically detects whether there is a fault in the steering gear 110. If so, the steering lift axle will be forced to lift, and the lift switch is in a locked state. If not, it can be used normally. When the vehicle speed is less than 20 km / h, the lowering switch button is turned on to inflate the rear airbag assembly 220 through the air supply mechanism. Then, the active steering lift axle 100 is lowered to contact the ground under the drive of the connecting arm assembly 240. At the same time, the control mechanism determines whether to enter the steering state according to the rotation angles of the first steering axle and suspension assembly 700 and the second steering axle and suspension assembly 600. In the state, if the input conditions meet the requirements of the active steering setting, the steering gear 110 rotates according to the angle signal sent by the control mechanism. After the steering operation is completed, the steering gear 110 returns to the center position. At the same time, the lifting switch button is turned on to inflate the front airbag assembly 210 through the air supply mechanism. Then, the active steering lifting bridge 100 is lifted and retracted under the drive of the connecting arm assembly 240 and hidden at the bottom of the frame 300. On the basis of ensuring the minimum turning diameter, it will not affect the consistency of the vehicle during driving, protects the components, extends the service life and improves the comfort of the vehicle.

[0083] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A suspension system based on an active steering lifting axle, characterized in that: include: Active steering lift axle; A mounting bracket assembly includes a front airbag assembly, a rear airbag assembly, a flip assembly, and a connecting arm assembly. The connecting arm assembly is fixed to the top of the active steering lifting bridge, and one end of the connecting arm assembly is fixedly connected to the bottom of the rear airbag assembly, and the other end is hinged to the flip assembly. The flip assembly is fixedly connected to both sides of the front airbag assembly. The tops of the front airbag assembly and the rear airbag assembly are respectively fixedly connected to the vehicle frame; An air supply mechanism and a control mechanism, wherein the air supply mechanism is connected to the front airbag assembly and the rear airbag assembly respectively, and the control mechanism is connected to the air supply mechanism and the active steering lifting bridge signal respectively; wherein, The front airbag assembly includes a first fixing bracket, a second fixing bracket, a hanger, a crossbeam, and a front airbag, wherein the first fixing bracket and the second fixing bracket are fixed at both ends of the hanger, and the tops of the first fixing bracket and the second bracket are respectively fixed to the vehicle frame, the outer sides of the first fixing bracket and the second fixing bracket are respectively hinged to the flip assembly, the two ends of the crossbeam are respectively fixed to the two flip assemblies, the front airbag is arranged between the hanger and the crossbeam, and the two ends are respectively fixedly connected to the hanger and the crossbeam; The flip assembly includes a first flap and a second flap, the first flap is fixed to the outer side of the first fixing bracket, the second flap is fixed to the outer side of the second fixing bracket, and the first flap and the second flap are fixedly connected to both ends of the beam.

2. The suspension system based on active steering lifting axle according to claim 1, characterized in that: The front airbag assembly also includes a first connecting plate and a second connecting plate, wherein two ends of the first connecting plate are respectively connected to the first fixing bracket and one end of the hanger, and two ends of the second connecting plate are respectively connected to the second fixing bracket and the other end of the hanger.

3. The suspension system based on active steering lifting axle according to claim 2, characterized in that: The rear airbag assembly includes a first mounting bracket, a second mounting bracket, a connecting beam and a rear airbag. The first mounting bracket and the second mounting bracket are symmetrically fixed on both sides of the bottom of the frame. The tops of the two rear airbags are respectively connected to the bottoms of the first mounting bracket and the second mounting bracket. The two ends of the connecting beam are respectively connected to the two rear airbags, and the bottoms of the two rear airbags are respectively fixedly connected to the connecting arm assembly.

4. The suspension system based on active steering lifting axle according to claim 3, characterized in that: The connecting arm assembly includes a first connecting arm assembly and a second connecting arm assembly, wherein: The first connecting arm assembly includes a first connecting rod and a first fixing seat, one end of the first connecting rod is hinged to the first flap, and the other end is fixedly connected to one of the rear airbags, the first fixing seat is mounted on the first connecting rod, and the bottom of the first fixing seat is fixedly connected to the active steering lifting bridge; The second connecting arm assembly includes a second connecting rod and a second fixed seat, one end of the second connecting rod is hinged to the second flap, and the other end is fixedly connected to another of the rear airbags, the second fixed seat is installed on the second connecting rod, and the bottom of the second fixed seat is fixedly connected to the active steering lifting bridge.

5. The suspension system based on active steering lifting axle according to claim 4, characterized in that: The mounting bracket assembly also includes a steering gear fixing assembly, which includes a first surrounding beam, a second surrounding beam, a third surrounding beam, a front side beam, a rear side beam and a connecting beam. The first surrounding beam, the second surrounding beam and the third surrounding beam constitute an installation space, and the installation space is located on the inner side of the second connecting rod. The front side beam is fixed to the side of the third surrounding beam, and the rear side beam is fixed to the side of the first surrounding beam. The connecting beams are respectively arranged at both ends of the top of the front side beam and the rear side beam, and are used to fix the steering gear fixing assembly to the frame.

6. The suspension system based on active steering lifting axle according to claim 1, characterized in that: The active steering lifting axle includes a steering gear, a dowel rod assembly and a steering axle assembly. The steering gear is fixedly mounted on the steering axle assembly. The steering gear is drivingly connected to the dowel rod assembly. The dowel rod assembly is rotatably connected to one end of the steering axle assembly. The steering axle assembly realizes active steering under the drive of the steering gear through the dowel rod assembly. Wherein, the steering axle assembly is fixedly connected to the bottom of the connecting arm assembly.

7. A suspension system control method based on active steering lifting axle, characterized in that: It is used to control the suspension system based on the active steering lifting axle according to any one of claims 1 to 6, and the control method includes the following steps: The air supply mechanism is controlled by the control mechanism to supply air to the front airbag assembly and the rear airbag assembly of the mounting bracket assembly respectively, so that the active steering lifting bridge is lowered or retracted around the flip assembly under the drive of the connecting arm assembly; The active steering lifting axle is steered or returned to its original position by a control mechanism.

8. A vehicle, characterized in that: The vehicle comprises the suspension system based on an active steering lifting axle according to any one of claims 1-6.

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