An amphibious vehicle with a liftable suspension

Abstract

The application discloses a amphibious vehicle with liftable suspension and relates to the field of amphibious vehicles.The amphibious vehicle with liftable suspension comprises a vehicle body, a driving unit, a front axle transmission unit and a rear axle transmission unit are internally installed in the vehicle body; the front axle transmission unit and the rear axle transmission unit are respectively located at two ends of the driving unit, and the driving unit is in transmission connection with the front axle transmission unit and the rear axle transmission unit.The amphibious vehicle with liftable suspension can drive the front axle transmission shaft assembly and the first rear axle transmission shaft in the front axle transmission unit and the rear axle transmission unit to perform transmission by using the driving unit, so that the vehicle body can perform four-wheel drive driving on land; meanwhile, the height of the front axle transmission shaft assembly and the first rear axle transmission shaft transmission part can be adjusted according to different road conditions by using the air spring and the worm gear, so that the ground clearance of the vehicle body can be adjusted, and different road conditions and different speeds can be adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of amphibious vehicles, in particular to an amphibious vehicle with liftable suspension. BACKGROUND

[0002] Amphibious vehicles are a new type of transportation tool, which can travel on water and land, and therefore have broad prospects in future development. First, amphibious vehicles can be used for rescue and emergency response. In the event of natural or man-made disasters, amphibious vehicles can quickly reach the scene and travel on water and land, thereby facilitating rescue and emergency response.

[0003] The transmission mode of the amphibious vehicle generally consists of an engine, a front axle, a rear axle and a turbine. When traveling on land, the engine drives the transmission components in the front axle and rear axle to drive the tires connected to the front axle and rear axle to rotate, thereby achieving the effect of traveling. When traveling in water, the turbine drives the propeller to rotate, thereby enabling travel in water.

[0004] However, the existing amphibious vehicles travel on complex road conditions. In order to carry more people, the existing amphibious vehicles have a longer body. If the suspension is low, the passability is low, and it is not convenient to travel on poor road conditions on land. However, if the suspension of the amphibious vehicle is high, when the travel speed needs to be increased on good road conditions on land, it is easy to cause the amphibious vehicle to shake or even overturn. Therefore, the present application provides an amphibious vehicle with liftable suspension. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an amphibious vehicle with liftable suspension, which solves the problem that the suspension of the amphibious vehicle is generally fixed and difficult to adapt to various complex road conditions.

[0006] To achieve the above purpose, the present application is implemented by the following technical scheme: an amphibious vehicle with liftable suspension, comprising a vehicle body, a driving unit, a front axle transmission unit and a rear axle transmission unit are installed inside the vehicle body;

[0007] The front axle transmission unit and the rear axle transmission unit are respectively located at both ends of the driving unit, and the driving unit is in transmission connection with the front axle transmission unit and the rear axle transmission unit;

[0008] The front axle transmission unit comprises:

[0009] A front axle transmission box is fixedly installed inside the vehicle body, both ends of the front axle transmission box are provided with a front axle transmission shaft assembly, and the front axle transmission shaft assembly is in transmission connection with the driving unit;

[0010] An air spring is arranged above the front axle transmission shaft assembly, used to realize adaptive adjustment of the height of the front axle, and automatically adjusts the height of the front axle according to different road conditions through connection with the vehicle control system;

[0011] The rear axle transmission unit comprises:

[0012] A rear axle transmission case is fixedly installed inside the vehicle body, and first rear axle transmission shafts are installed at both ends of the rear axle transmission case and are in transmission connection with the driving unit;

[0013] An electric worm gear lifting mechanism comprises a worm wheel, a worm gear and a driving motor, the worm wheel is rotatably installed inside the vehicle body and movably sleeved outside the end of the first rear axle transmission shaft, the worm gear is in meshing connection with the worm wheel, and the driving motor is connected with the worm gear to drive the worm wheel to rotate, thereby realizing accurate adjustment of the height of the rear axle, and automatically switching the height of the rear axle according to the water-land driving state through connection with the vehicle control system.

[0014] Preferably, the vehicle body comprises a streamlined body, a high-strength frame and hub-driven wheels, the streamlined body is fixedly sleeved outside the high-strength frame, the high-strength frame is installed outside the driving unit, the front axle transmission unit and the rear axle transmission unit, and the hub-driven wheels are in transmission connection with the front axle transmission shaft assembly and the first rear axle transmission shaft respectively, the hub is provided with a driving motor, and the driving torque of each wheel can be independently controlled according to driving requirements.

[0015] Preferably, the driving unit comprises:

[0016] A hybrid power system comprises an engine, a motor and a transfer case, the engine and the motor are in transmission connection with the transfer case, thereby realizing flexible distribution and switching of power;

[0017] A front axle transfer shaft is in transmission connection with the transfer case and the front axle transmission unit at both ends thereof;

[0018] A rear axle transfer shaft is in transmission connection with the transfer case and the rear axle transmission unit at both ends thereof.

[0019] Preferably, a retractable propeller is installed inside the high-strength frame, the end of the retractable propeller extends outward through the streamlined body, a jet pump transmission shaft is installed between the transfer case and the retractable propeller, used to provide power when driving on water, and the retractable propeller and the power output are controlled through the vehicle control system.

[0020] Preferably, the front axle transmission box is internally provided with a front axle transmission seat, the front axle transmission shaft assembly is connected with the front axle transmission seat through a universal joint to realize the angle self-adaptation between the front axle transmission shaft assembly and the front axle transmission seat, the other end of the front axle transmission shaft assembly extends outward and is connected with a front axle steering knuckle, the air spring is internally provided with an extension shaft, and the bottom end of the extension shaft extends downward and is rotatably arranged at the top of the front axle steering knuckle, and the height of the front axle can be self-adaptively adjusted by controlling the air pressure in the air spring.

[0021] Preferably, the front axle transmission shaft assembly comprises a first front axle transmission shaft, a second front axle transmission shaft and a third front axle transmission shaft, the second front axle transmission shaft is connected with the front axle transmission seat through a universal joint, the end of the third front axle transmission shaft penetrates through the front axle steering knuckle and is connected with the hub drive wheel, the second front axle transmission shaft and the third front axle transmission shaft are connected through a constant-velocity universal joint, and the transmission stability of the front axle transmission shaft assembly during steering and height adjustment is ensured.

[0022] Preferably, the side surface of the front axle transmission box is rotatably provided with a front axle upper swing arm and a front axle lower swing arm, the other end of the front axle upper swing arm and the other end of the front axle lower swing arm are respectively hingedly connected with the bottom end of the extension shaft and the bottom end of the front axle steering knuckle, the top of the front axle transmission box is fixedly provided with a fixed frame, and a front axle shock absorber with adjustable damping is arranged between the outer side of the fixed frame and the front axle upper swing arm, which is used for buffering the vibration of the front axle under different road conditions and adjusting the damping value in real time according to the instruction of the vehicle-mounted control system.

[0023] Preferably, the rear axle transmission box is internally provided with a rear axle transmission seat, the first rear axle transmission shaft is connected with the rear axle transmission seat through a universal joint to realize the angle self-adaptation between the first rear axle transmission shaft and the rear axle transmission seat, the other end of the first rear axle transmission shaft is drivingly connected with the second rear axle transmission shaft, the end of the second rear axle transmission shaft is drivingly connected with the third rear axle transmission shaft, the other end of the third rear axle transmission shaft is connected with the hub drive wheel, the outer side of the third rear axle transmission shaft movably sleeves the rear axle rotating joint, the side surface of the worm gear is hingedly connected with the top end and the bottom end of the rear axle rotating joint through a rear axle upper swing arm and a rear axle lower swing arm, and a rear axle shock absorber with adjustable damping is further arranged between the side surface of the worm gear and the outer side of the rear axle rotating joint, and the precise adjustment and buffering of the height of the rear axle can be realized through the cooperation of the electric worm gear and worm lifting mechanism and the swing arm suspension system.

[0024] Preferably, the first rear axle transmission shaft and the second rear axle transmission shaft, and the second rear axle transmission shaft and the third rear axle transmission shaft are connected through constant-velocity universal joints, and the transmission stability of the rear axle transmission shaft during height adjustment is ensured.

[0025] Preferably, the driving motor is a brushless motor, the rotation speed and torque of the brushless motor are accurately controlled by the vehicle-mounted control system, the worm is driven to rotate, the worm gear is further driven to rotate, the millimeter-level accurate adjustment of the rear axle height is realized, the height adjustment strategy is automatically switched according to the water-land driving conditions, and the passability and adaptability of the vehicle are improved.

[0026] The amphibious vehicle with liftable suspension has the following beneficial effects:

[0027] 1. In the process of using the amphibious vehicle with liftable suspension, the driving unit can drive the front axle transmission shaft assembly and the first rear axle transmission shaft in the front axle transmission unit and the rear axle transmission unit to transmit power, so that the vehicle body can drive on land in four-wheel drive mode, the height of the front axle transmission shaft assembly and the first rear axle transmission shaft transmission part can be adjusted according to different road conditions by using the air spring and the worm gear, and the ground clearance of the vehicle body can be adjusted, so that the vehicle can adapt to different road conditions and different speeds.

[0028] 2. When the driving motor works, the worm can be driven to rotate, and the worm gear can be further driven to rotate. When the worm gear rotates, the rear axle rotating joint on the side of the worm gear moves in an arc shape, and the rear axle upper swing arm, the rear axle lower swing arm, the rear axle shock absorber, the second rear axle transmission shaft and the third rear axle transmission shaft between the rear axle rotating joint and the worm gear move, so that the height of the rear axle rotating joint is adjusted. The driving motor is a brushless motor, the rotation speed and torque of the brushless motor are accurately controlled by the vehicle-mounted control system, the worm is driven to rotate, the worm gear is further driven to rotate, the millimeter-level accurate adjustment of the rear axle height is realized, the height adjustment strategy is automatically switched according to the water-land driving conditions, and the passability and adaptability of the vehicle are improved.

[0029] The amphibious vehicle with liftable suspension, the side of the worm gear is hinged with the top end and the bottom end of the rear axle rotating joint, the rear axle upper swing arm and the rear axle lower swing arm are arranged between the side of the worm gear and the top end and the bottom end of the rear axle rotating joint, and the rear axle shock absorber with adjustable damping is arranged between the side of the worm gear and the outside of the rear axle rotating joint. Through the cooperation of the electric worm gear and worm lifting mechanism and the swing arm suspension system, the accurate adjustment and buffering of the height of the rear axle can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0031] Figure 1 The structure of the present application is shown in the figure;

[0032] Figure 2 Structure diagram of the frame, driving unit, front axle transmission unit and rear axle transmission unit of the application;

[0033] Figure 3 Structure diagram of the driving unit, front axle transmission unit and rear axle transmission unit of the application;

[0034] Figure 4 Structure diagram of the frame and front axle transmission unit of the application;

[0035] Figure 5 Structure diagram of the front axle transmission unit of the application;

[0036] Figure 6 Structure diagram of the front axle transmission unit of the application;

[0037] Figure 7 Structure diagram of the frame and rear axle transmission unit of the application;

[0038] Figure 8 Structure diagram of the rear axle transmission unit of the application;

[0039] Figure 9 Structure diagram of the rear axle transmission unit of the application;

[0040] Figure 10 Structure diagram of the rear axle transmission unit of the application;

[0041] In the figure: 1, vehicle body; 11, streamlined body; 12, high-strength frame; 13, wheel hub drive wheel; 2, driving unit; 21, engine; 22, transfer case; 23, front axle transmission shaft; 24, pump transmission shaft; 25, rear axle transmission shaft; 26, retractable propeller; 3, front axle transmission unit; 31, front axle transmission case; 32, front axle transmission seat; 33, front axle transmission shaft assembly; 331, first front axle transmission shaft; 332, second front axle transmission shaft; 333, third front axle transmission shaft; 34, front axle knuckle; 35, air spring; 36, extension shaft; 37, fixing frame; 38, front axle upper swing arm; 381, front axle shock absorber; 39, front axle lower swing arm; 4, rear axle transmission unit; 41, rear axle transmission case; 42, rear axle transmission seat; 43, first rear axle transmission shaft; 44, second rear axle transmission shaft; 45, third rear axle transmission shaft; 46, rear axle knuckle; 461, rear axle upper swing arm; 462, rear axle lower swing arm; 463, rear axle shock absorber; 47, worm gear; 48, driving motor; 49, worm. DETAILED DESCRIPTION

[0042] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] The amphibious vehicle with liftable suspension provided in the embodiments of the present application solves the problem that the suspension of the amphibious vehicle is generally fixed and difficult to adapt to various complex road conditions. In use, the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 in the front axle transmission unit 3 and the rear axle transmission unit 4 can be driven by the driving unit 2 to realize four-wheel drive driving of the vehicle body 1 on land. The height of the transmission part of the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 can be adjusted according to different road conditions by using the air spring 35 and the worm gear 47, so as to adjust the ground clearance of the vehicle body 1 and facilitate adaptation to different road conditions and different speeds.

[0044] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings and specific embodiments of the present application.

[0045] The embodiments of the present application disclose an amphibious vehicle with liftable suspension, according to the accompanying Figures 1-10 As shown in the drawings, the amphibious vehicle comprises a vehicle body 1, and a driving unit 2, a front axle transmission unit 3 and a rear axle transmission unit 4 are installed inside the vehicle body 1.

[0046] The front axle transmission unit 3 and the rear axle transmission unit 4 are respectively located at two ends of the driving unit 2, and the driving unit 2 is in transmission connection with the front axle transmission unit 3 and the rear axle transmission unit 4.

[0047] The front axle transmission unit 3 comprises:

[0048] The front axle transmission unit 3 comprises:

[0049] The air spring 35 is arranged above the front axle transmission shaft assembly 33, and is used for realizing self-adaptive adjustment of the front axle height. The air spring 35 is connected with a vehicle-mounted control system, and automatically adjusts the front axle height according to different road conditions. The vehicle-mounted control system is a mature technology, and will not be described herein.

[0050] The rear axle transmission unit 4 comprises:

[0051] The rear axle transmission case 41 is fixedly installed in the interior of the vehicle body 1, and both ends of the rear axle transmission case 41 are provided with the first rear axle transmission shaft 43, which is in transmission connection with the driving unit 2;

[0052] The electric worm gear lifting mechanism comprises a worm wheel 47, a worm gear 49 and a driving motor 48. The worm wheel 47 is rotatably installed in the interior of the vehicle body 1, and is movably sleeved on the outside of the end of the first rear axle transmission shaft 43. The worm gear 49 is in meshing connection with the worm wheel 47. The driving motor 48 is connected with the worm gear 49, and is used for driving the worm wheel 47 to rotate, so as to realize the accurate adjustment of the height of the rear axle, and the height of the rear axle is automatically switched according to the water-land driving state through the connection with the vehicle-mounted control system.

[0053] In use, the driving unit 2 can drive the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 in the front axle transmission unit 3 and the rear axle transmission unit 4 to realize the four-wheel driving of the vehicle body 1 on land. Meanwhile, the height of the transmission part of the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 can be adjusted according to the road conditions by using the air spring 35 and the worm wheel 47, so as to adjust the ground clearance of the vehicle body 1 and adapt to different road conditions and different speeds.

[0054] When the driving motor 48 works, the worm gear 49 can be driven to rotate, and the worm wheel 47 can be driven to rotate accordingly. When the worm wheel 47 rotates, the rear axle rotating joint 46 on the side of the worm wheel 47 moves in an arc shape, and the rear axle upper swing arm 461, the rear axle lower swing arm 462, the rear axle shock absorber 463, the second rear axle transmission shaft 44 and the third rear axle transmission shaft 45 between the rear axle rotating joint 46 and the worm wheel 47 move accordingly, so as to adjust the height.

[0055] Further, the vehicle body 1 comprises a streamlined body 11, a high-strength frame 12 and a hub driving wheel 13. The streamlined body 11 is fixedly sleeved on the outside of the high-strength frame 12, and the high-strength frame 12 is installed on the outside of the driving unit 2, the front axle transmission unit 3 and the rear axle transmission unit 4. The hub driving wheel 13 is in transmission connection with the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 respectively. The hub driving wheel 13 is a prior art, and a driving motor is arranged in the hub thereof. The driving torque of each wheel can be independently controlled according to the driving requirement.

[0056] In particular, the driving unit 2 comprises:

[0057] The hybrid power system comprises an engine 21, a motor and a transfer case 22. The engine 21 and the motor are in transmission connection with the transfer case 22. The engine 21 and the motor are matched with the transfer case 22 to realize the flexible distribution and switching of power.

[0058] The front axle propeller shaft 23 is in transmission connection with the transfer case 22 and the front axle transmission unit 3 at both ends.

[0059] The rear axle propeller shaft 25 is in transmission connection with the transfer case 22 and the rear axle transmission unit 4 at both ends.

[0060] In particular, the high-strength frame 12 is internally mounted with a retractable propeller 26, the end of the retractable propeller 26 extends outward through the streamlined body 11, and the transfer case 22 and the retractable propeller 26 are mounted with a jet pump transmission shaft 24, which is used to provide power when driving on water, and the retractable propeller is controlled by the vehicle-mounted control system. The power output is controlled.

[0061] The transfer case 22 is a structure, the engine 21 can be in transmission connection with the front axle propeller shaft 23, the rear axle propeller shaft 25 and the jet pump transmission shaft 24 through the transfer case 22, when driving on land, the engine 21 can drive the front axle propeller shaft 23 and the rear axle propeller shaft 25 to rotate, when driving in water, the engine 21 can drive the jet pump transmission shaft 24 to rotate, and the retractable propeller 26 can be used to drive in water when the jet pump transmission shaft 24 rotates.

[0062] Further, the front axle transmission case 31 is internally mounted with a front axle transmission seat 32, the front axle transmission shaft assembly 33 is connected with the front axle transmission seat 32 through a universal joint, realizing the angle self-adaptation between the front axle transmission shaft assembly 33 and the front axle transmission seat 32, the other end of the front axle transmission shaft assembly 33 extends outward and is connected with the front axle knuckle 34, the air spring 35 is internally mounted with the extension shaft 36, and the bottom end of the extension shaft 36 extends downward and is rotatably arranged on the top of the front axle knuckle 34, by controlling the air pressure in the air spring 35, the height of the front axle can be self-adaptively adjusted.

[0063] By using the air spring 35, the extension shaft 36 can be vertically moved when the air spring 35 works, when the extension shaft 36 moves downward, the front axle knuckle 34 can be moved downward, and when the front axle knuckle 34 moves upward, the front axle knuckle 34 can be moved upward, so that the height of the front axle knuckle 34 can be freely adjusted.

[0064] In particular, the front axle transmission shaft assembly 33 includes a first front axle transmission shaft 331, a second front axle transmission shaft 332 and a third front axle transmission shaft 333, the second front axle transmission shaft 332 is connected with the front axle transmission seat 32 through a universal joint, the end of the third front axle transmission shaft 333 penetrates through the front axle knuckle 34 and is connected with the hub drive wheel 13, the second front axle transmission shaft 332 and the third front axle transmission shaft 333 are in transmission connection through a constant velocity universal joint, ensuring the transmission stability of the front axle transmission shaft assembly 33 during steering and height adjustment.

[0065] The second front axle shaft 332 and the third front axle shaft 333 are connected through a constant velocity universal joint, so that the height of the third front axle shaft 333 is adjusted, and the second front axle shaft 332 can still achieve the transmission effect after angular rotation, and the end of the third front axle shaft 333 penetrates the front axle knuckle 34 and is connected with the hub drive wheel 13.

[0066] Further, the side of the front axle transmission box 31 is rotatably provided with a front axle upper swing arm 38 and a front axle lower swing arm 39, the other end of the front axle upper swing arm 38 and the front axle lower swing arm 39 are respectively hinged with the bottom end of the extension shaft 36 and the bottom end of the front axle knuckle 34, and the top of the front axle transmission box 31 is fixedly provided with a fixed frame 37, and the outer side of the fixed frame 37 and the front axle upper swing arm 38 are provided with a front axle shock absorber 381 with adjustable damping, which is used to buffer the vibration of the front axle under different road conditions, and adjust the damping value in real time according to the instruction of the vehicle-mounted control system.

[0067] The front axle upper swing arm 38, the front axle lower swing arm 39 and the front axle shock absorber 381 can connect and damp the front axle knuckle 34 and the front axle transmission box 31 during driving.

[0068] In particular, the rear axle transmission seat 42 is installed in the inside of the rear axle transmission box 41, the first rear axle shaft 43 is connected with the rear axle transmission seat 42 through a universal joint, the angle between the first rear axle shaft 43 and the rear axle transmission seat 42 is self-adapted, the other end of the first rear axle shaft 43 is connected with the second rear axle shaft 44 in transmission, the end of the second rear axle shaft 44 is connected with the third rear axle shaft 45 in transmission, the other end of the third rear axle shaft 45 is connected with the hub drive wheel 13, the outer side of the third rear axle shaft 45 movably sleeves the rear axle rotating joint 46, the side of the worm gear 47 is hinged with the rear axle upper swing arm 461 and the rear axle lower swing arm 462 between the top end and the bottom end of the rear axle rotating joint 46, and the side of the worm gear 47 and the outer side of the rear axle rotating joint 46 are further provided with the rear axle shock absorber 463 with adjustable damping, through the cooperation of the electric worm gear lifting mechanism and the swing arm suspension system, the precise adjustment and buffering of the rear axle height can be realized.

[0069] Further, the first rear axle shaft 43 and the second rear axle shaft 44, and the second rear axle shaft 44 and the third rear axle shaft 45 are connected through constant velocity universal joints, to ensure the smooth transmission of the rear axle shaft during height adjustment.

[0070] The second rear axle shaft 44 and the third rear axle shaft 45 are connected through constant velocity universal joints, to facilitate the adjustment of the angle and height of the second rear axle shaft 44 and the third rear axle shaft 45.

[0071] Further, the driving motor 48 is a brushless motor, the rotation speed and torque of the brushless motor 48 are accurately controlled through the vehicle-mounted control system, the worm 49 is driven to rotate, the worm gear 47 is driven to rotate, the millimeter-level accurate adjustment of the rear axle height is realized, the height adjustment strategy is automatically switched according to the water-land running working condition, and the passability and adaptability of the vehicle are improved.

[0072] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An amphibious vehicle with a liftable suspension, comprising a vehicle body (1), characterized in that, The vehicle body (1) is equipped with a drive unit (2), a front axle transmission unit (3) and a rear axle transmission unit (4). The front axle transmission unit (3) and the rear axle transmission unit (4) are located at both ends of the drive unit (2), and the drive unit (2) is connected to the front axle transmission unit (3) and the rear axle transmission unit (4) in a transmission connection. The front axle drive unit (3) includes: The front axle transmission box (31) is fixedly installed inside the vehicle body (1). Both ends of the front axle transmission box (31) are equipped with front axle drive shaft assemblies (33), and the front axle drive shaft assemblies (33) are connected to the drive unit (2) in a transmission connection. An air spring (35) is located above the front axle drive shaft assembly (33) to achieve adaptive adjustment of the front axle height and to automatically adjust the front axle height according to different road conditions by connecting with the vehicle control system. The rear axle drive unit (4) includes: The rear axle transmission box (41) is fixedly installed inside the vehicle body (1). The two ends of the rear axle transmission box (41) are equipped with the first rear axle drive shaft (43), which is connected to the drive unit (2) for transmission. The electric worm gear lifting mechanism includes a worm wheel (47), a worm (49) and a drive motor (48). The worm wheel (47) is rotatably installed inside the vehicle body (1) and is movably sleeved on the outside of the end of the first rear axle drive shaft (43). The worm (49) is meshed with the worm wheel (47). The drive motor (48) is connected to the worm (49) to drive the worm wheel (47) to rotate, thereby achieving precise adjustment of the rear axle height. It is also connected to the vehicle control system to automatically switch the rear axle height according to the water and land driving conditions. The rear axle transmission housing (41) is equipped with a rear axle transmission seat (42). The first rear axle transmission shaft (43) is connected to the rear axle transmission seat (42) via a universal joint, realizing adaptive angle between the first rear axle transmission shaft (43) and the rear axle transmission seat (42). The other end of the first rear axle transmission shaft (43) is connected to a second rear axle transmission shaft (44). The end of the second rear axle transmission shaft (44) is connected to a third rear axle transmission shaft (45). The other end of the third rear axle transmission shaft (45) is connected to the hub drive wheel (1). 3) Connected to each other, and the rear axle rotating joint (46) is movably sleeved on the outside of the third rear axle drive shaft (45). The upper rear axle swing arm (461) and the lower rear axle swing arm (462) are respectively hinged between the side of the worm wheel (47) and the top and bottom of the rear axle rotating joint (46). An adjustable damping rear axle shock absorber (463) is also provided between the side of the worm wheel (47) and the outside of the rear axle rotating joint (46). Through the cooperation of the electric worm gear lifting mechanism and the swing arm suspension system, the rear axle height can be precisely adjusted and buffered.

2. An amphibious vehicle with a liftable suspension according to claim 1, characterized in that, The vehicle body (1) includes a streamlined body (11), a frame (12) and hub drive wheels (13). The streamlined body (11) is fixedly mounted on the outside of the frame (12), and the frame (12) is mounted on the outside of the drive unit (2), the front axle drive unit (3) and the rear axle drive unit (4). The hub drive wheels (13) are connected to the front axle drive shaft assembly (33) and the first rear axle drive shaft (43) respectively. The hub has a built-in drive motor, which can independently control the driving torque of each wheel according to driving requirements.

3. An amphibious vehicle with a liftable suspension according to claim 2, characterized in that, The driving unit (2) includes: The hybrid power system includes an engine (21), an electric motor and a transfer case (22). Both the engine (21) and the electric motor are connected to the transfer case (22) for transmission, so as to realize flexible power distribution and switching. The front axle transfer shaft (23) is connected at both ends to the transfer case (22) and the front axle transmission unit (3). The rear axle transfer shaft (25) is connected at both ends to the transfer case (22) and the rear axle transmission unit (4).

4. An amphibious vehicle with a liftable suspension according to claim 3, characterized in that, The frame (12) is equipped with a retractable thruster (26), the end of which extends outward through the streamlined body (11), and a jet pump drive shaft (24) is installed between the transfer case (22) and the retractable thruster (26) to provide power when traveling on water, and to control the retraction and extension of the thruster and the power output through the vehicle control system.

5. An amphibious vehicle with a liftable suspension according to claim 3, characterized in that, The front axle drive housing (32) is installed inside the front axle drive box (31). The front axle drive shaft assembly (33) is connected to the front axle drive housing (32) through a universal joint, so as to realize the adaptive angle between the front axle drive shaft assembly (33) and the front axle drive housing (32). The other end of the front axle drive shaft assembly (33) extends outward and is connected to the front axle steering knuckle (34). The air spring (35) has an extension shaft (36) installed inside, and the bottom end of the extension shaft (36) extends downward and is rotatably set on the top of the front axle steering knuckle (34). By controlling the air pressure in the air spring (35), the adaptive adjustment of the front axle height can be realized.

6. An amphibious vehicle with a liftable suspension according to claim 5, characterized in that, The front axle driveshaft assembly (33) includes a first front axle driveshaft (331), a second front axle driveshaft (332), and a third front axle driveshaft (333). The second front axle driveshaft (332) is connected to the front axle drive seat (32) via a universal joint. The end of the third front axle driveshaft (333) passes through the front axle steering knuckle (34) and is connected to the wheel hub drive wheel (13). The second front axle driveshaft (332) and the third front axle driveshaft (333) are connected by a constant velocity universal joint to ensure the smooth transmission of the front axle driveshaft assembly (33) during steering and height adjustment.

7. An amphibious vehicle with a liftable suspension according to claim 5, characterized in that, The front axle transmission box (31) is rotatably equipped with a front axle upper swing arm (38) and a front axle lower swing arm (39). The other ends of the front axle upper swing arm (38) and the front axle lower swing arm (39) are respectively hinged to the bottom end of the extension shaft (36) and the bottom end of the front axle steering knuckle (34). A fixed frame (37) is fixedly installed on the top of the front axle transmission box (31). An adjustable damping front axle shock absorber (381) is provided between the outer side of the fixed frame (37) and the front axle upper swing arm (38) to buffer the vibration of the front axle under different road conditions and adjust the damping value in real time according to the instructions of the vehicle control system.

8. An amphibious vehicle with a liftable suspension according to claim 7, characterized in that, The first rear axle drive shaft (43) and the second rear axle drive shaft (44), and the second rear axle drive shaft (44) and the third rear axle drive shaft (45) are all connected by constant velocity universal joints to ensure the smooth transmission of the rear axle drive shaft during height adjustment.

9. An amphibious vehicle with a liftable suspension according to claim 1, characterized in that, The drive motor (48) is a brushless motor. The speed and torque of the brushless motor (48) are precisely controlled by the vehicle control system, which drives the worm (49) to rotate, thereby driving the worm wheel (47) to rotate, realizing millimeter-level precise adjustment of the rear axle height, and automatically switching the height adjustment strategy according to the water and land driving conditions, thereby improving the vehicle's passability and adaptability.

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