Amphibious vehicle with liftable suspension

Abstract

The invention discloses an amphibious vehicle with a liftable suspension, and relates to the field of amphibious vehicles. The amphibious vehicle with the liftable suspension comprises a vehicle body, and a driving unit, a front axle transmission unit and a rear axle transmission unit are installed in the vehicle body. The front axle transmission unit and the rear axle transmission unit are located at the two ends of the driving unit respectively, and the driving unit is in transmission connection with the front axle transmission unit and the rear axle transmission unit. According to the amphibious vehicle with the liftable suspension, the arranged driving unit can drive a front axle transmission shaft assembly and a first rear axle transmission shaft in the front axle transmission unit and the rear axle transmission unit to conduct transmission, and therefore the vehicle body can conduct four-wheel-drive running on the land; meanwhile, according to different road conditions, the heights of the front axle transmission shaft assembly and the first rear axle transmission shaft transmission part can be adjusted through an air spring and a worm gear, then the height of the vehicle body above the ground is adjusted, and the vehicle can adapt to different road conditions and different vehicle speeds conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of amphibious vehicles, in particular to an amphibious vehicle with a lifting suspension. Background Art

[0002] Amphibious vehicles are a new type of transportation that can travel on both water and land, so they have broad prospects for future development. First, amphibious vehicles can be used for rescue and emergency response. When natural disasters or man-made disasters occur, amphibious vehicles can quickly reach the scene and travel on both water and land, thus facilitating rescue and emergency response.

[0003] The transmission method of an amphibious vehicle generally consists of an engine, a front axle, a rear axle and a turbine. When it needs to travel on land, the engine drives the transmission components in the front axle and the rear axle, which in turn drives the tires connected to the front axle and the rear axle to rotate, thereby achieving the purpose of driving. When it needs to travel in water, the turbine drives the blades to rotate, so that it can travel in water.

[0004] However, the road conditions for existing amphibious vehicles are relatively complicated. In order to carry more people, the existing amphibious vehicles have longer bodies. If the suspension is low, the passability is low, and it is inconvenient to drive on land with poor road conditions. However, if the suspension of the amphibious vehicle is high, when it is necessary to increase its driving speed on land with good road conditions, it is easy to cause the amphibious vehicle to shake or even roll over. Therefore, the present application proposes an amphibious vehicle with a liftable suspension. Summary of the invention

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

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an amphibious vehicle with a liftable suspension, comprising a vehicle body, wherein a drive 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 two ends of the driving unit, and the driving unit is drivingly connected 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, which is fixedly installed inside the vehicle body, with front axle drive shaft assemblies installed at both ends of the front axle transmission box, and the front axle drive shaft assembly is drivingly connected to the drive unit;

[0010] Air spring, which is installed above the front axle drive shaft assembly and is used to achieve adaptive adjustment of the front axle height. It is connected to the vehicle control system to automatically adjust the front axle height according to different road conditions.

[0011] The rear axle transmission unit comprises:

[0012] A rear axle transmission box, the rear axle transmission box is fixedly installed inside the vehicle body, both ends of the rear axle transmission box are installed with a first rear axle transmission shaft, and the first rear axle transmission shaft is drivingly connected to the drive unit;

[0013] The electric worm gear lifting mechanism includes a worm wheel, a worm and a driving motor. The worm wheel is rotatably installed inside the vehicle body, and the worm wheel is movably sleeved on the outer side of the end of the first rear axle transmission shaft. The worm is meshingly connected with the worm wheel, and the driving motor is connected with the worm to drive the worm wheel to rotate, thereby realizing precise adjustment of the rear axle height, and automatically switching the rear axle height according to the water and land driving status by connecting with the vehicle-mounted control system.

[0014] Preferably, the vehicle body includes a streamlined body, a high-strength frame and hub-driven wheels, the streamlined body is fixedly sleeved on the outside of the high-strength frame, and the high-strength frame is installed on the outside of the drive unit, the front axle transmission unit and the rear axle transmission unit, the hub-driven wheels are respectively connected to the front axle drive shaft assembly and the first rear axle drive shaft, and the wheel hub has a built-in drive motor, which can independently control the driving torque of each wheel according to driving requirements.

[0015] Preferably, the driving unit comprises:

[0016] The hybrid power system includes an engine, a motor and a transfer case. Both the engine and the motor are connected to the transfer case to achieve flexible distribution and switching of power.

[0017] Front axle transfer shaft, both ends of which are drivingly connected to the transfer case and the front axle transmission unit;

[0018] The rear axle transfer shaft has two ends which are respectively connected to the transfer case and the rear axle transmission unit.

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

[0020] Preferably, a front axle drive seat is installed inside the front axle transmission box, and the front axle drive shaft assembly is connected to the front axle drive seat through a universal joint to achieve angle adaptation between the front axle drive shaft assembly and the front axle drive seat, and the other end of the front axle drive shaft assembly extends outward and is connected to the front axle steering knuckle, and an extension shaft is installed inside the air spring, and the bottom end of the extension shaft extends downward and is rotatably set on the top of the front axle steering knuckle, and the front axle height can be adaptively adjusted by controlling the air pressure in the air spring.

[0021] Preferably, the front axle drive shaft assembly includes a first front axle drive shaft, a second front axle drive shaft and a third front axle drive shaft, the second front axle drive shaft is connected to the front axle drive seat through a universal joint, the end of the third front axle drive shaft passes through the front axle steering knuckle and is connected to the wheel hub driving wheel, and the second front axle drive shaft and the third front axle drive shaft are connected through a constant velocity universal joint to ensure the transmission stability of the front axle drive shaft assembly during steering and height adjustment.

[0022] Preferably, the side 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 ends of the front axle upper swing arm and the front axle lower swing arm are respectively hinged to the bottom end of the extension shaft and the bottom end of the front axle steering knuckle, and a fixing frame is fixedly installed on the top of the front axle transmission box, and a front axle shock absorber with adjustable damping is arranged between the outer side of the fixing 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 instructions of the vehicle-mounted control system.

[0023] Preferably, a rear axle drive seat is installed inside the rear axle transmission case, and the first rear axle drive shaft is connected to the rear axle drive seat through a universal joint to achieve angle adaptation between the first rear axle drive shaft and the rear axle drive seat, the other end of the first rear axle drive shaft is transmission-connected to the second rear axle drive shaft, the end of the second rear axle drive shaft is transmission-connected to the third rear axle drive shaft, the other end of the third rear axle drive shaft is connected to the wheel hub driving wheel, and a rear axle rotating joint is movably sleeved on the outer side of the third rear axle drive shaft, a rear axle upper swing arm and a rear axle lower swing arm are respectively hinged between the side surface of the worm wheel and the top and bottom ends of the rear axle rotating joint, and a rear axle shock absorber with adjustable damping is also arranged between the side surface of the worm wheel and the outer side of the rear axle rotating joint, and accurate adjustment and buffering of the rear axle height can be achieved through the cooperation of an electric worm gear lifting mechanism and a swing-arm suspension system.

[0024] Preferably, the first rear axle drive shaft and the second rear axle drive shaft, and the second rear axle drive shaft and the third rear axle drive shaft are connected via constant velocity universal joints to ensure smooth transmission of the rear axle drive shafts during height adjustment.

[0025] Preferably, the drive motor is a brushless motor, and the speed and torque of the brushless motor are precisely controlled by the vehicle-mounted control system to drive the worm to rotate, and then drive the worm wheel to rotate, thereby achieving 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.

[0026] The present invention discloses an amphibious vehicle with a liftable suspension, which has the following beneficial effects:

[0027] 1. The amphibious vehicle with a liftable suspension can, during use, drive the front axle transmission unit and the rear axle transmission unit to drive the front axle transmission shaft assembly and the first rear axle transmission shaft to perform transmission, thereby realizing four-wheel drive of the vehicle body on land. At the same time, the air spring and the worm gear can be used to adjust the height of the front axle transmission shaft assembly and the first rear axle transmission shaft transmission part according to different road conditions, thereby realizing the adjustment of the height of the vehicle body from the ground, which is convenient for adapting to different road conditions and different vehicle speeds.

[0028] 2. The amphibious vehicle with liftable suspension can drive the worm to rotate when the driving motor is working, and then drive the worm wheel to rotate accordingly. When the worm wheel rotates, the rear axle rotating joint on its side moves in an arc shape, and at the same time, the rear axle upper swing arm, rear axle lower swing arm, rear axle shock absorber, second rear axle drive shaft and third rear axle drive shaft between the rear axle rotating joint and the worm wheel move accordingly, thereby achieving the adjustment of the height. The driving motor is a brushless motor. The speed and torque of the brushless motor are precisely controlled by the vehicle-mounted control system to drive the worm to rotate, and then drive the worm wheel to rotate, thereby achieving millimeter-level precise adjustment of the rear axle height, and automatically switching the height adjustment strategy according to the amphibious driving conditions, thereby improving the vehicle's passability and adaptability.

[0029] The amphibious vehicle with a liftable suspension has a rear axle upper swing arm and a rear axle lower swing arm hinged between the side of the worm wheel and the top and bottom ends of the rear axle rotating joint, respectively, and a rear axle shock absorber with adjustable damping is also provided between the side of the worm wheel and the outer side of the rear axle rotating joint. Through the cooperation of the electric worm gear lifting mechanism and the swing arm suspension system, precise adjustment and buffering of the rear axle height can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the vehicle frame, the drive unit, the front axle transmission unit and the rear axle transmission unit of the present invention;

[0033] Figure 3 It is a schematic structural diagram of the drive unit, the front axle transmission unit and the rear axle transmission unit of the present invention;

[0034] Figure 4 It is a structural schematic diagram of the vehicle frame and the front axle transmission unit of the present invention;

[0035] Figure 5 It is a structural schematic diagram of the front axle transmission unit of the present invention;

[0036] Figure 6 It is a partial structural schematic diagram of the front axle transmission unit of the present invention;

[0037] Figure 7 It is a structural schematic diagram of the vehicle frame and rear axle transmission unit of the present invention;

[0038] Figure 8 It is a structural schematic diagram of the rear axle transmission unit of the present invention;

[0039] Fig. 9 This is a partial structural schematic diagram of a rear axle transmission unit of the present invention;

[0040] Fig.10 This is the second partial structural schematic diagram of the rear axle transmission unit of the present invention.

[0041] In the figure: 1. body; 11. streamlined body; 12. high-strength frame; 13. wheel hub drive wheel; 2. drive unit; 21. engine; 22. transfer case; 23. front axle transfer shaft; 24. jet pump drive shaft; 25. rear axle transfer shaft; 26. retractable propeller; 3. front axle drive unit; 31. front axle drive box; 32. front axle drive seat; 33. front axle drive shaft assembly; 331. first front axle drive shaft; 332. second front axle drive shaft; 333. third front axle drive shaft; 34. front axle steering 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 box; 42, rear axle transmission seat; 43, first rear axle drive shaft; 44, second rear axle drive shaft; 45, third rear axle drive shaft; 46, rear axle rotating joint; 461, rear axle upper swing arm; 462, rear axle lower swing arm; 463, rear axle shock absorber; 47, worm gear; 48, drive motor; 49, worm. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] The embodiment of the present application solves the problem that the suspension of amphibious vehicles is generally fixed and difficult to adapt to various complex road conditions by providing an amphibious vehicle with a liftable suspension. In the process of use, the drive 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 drive, so that the vehicle body 1 can drive four-wheel drive on land. At the same time, the air spring 35 and the worm gear 47 can be used to adjust the height of the transmission part of the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 according to different road conditions, thereby adjusting the height of the vehicle body 1 from the ground, which is convenient for adapting to different road conditions and different vehicle speeds.

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] The embodiment of the present invention discloses an amphibious vehicle with a liftable suspension. Figure 1-10 As shown, it includes a vehicle body 1, inside of which a drive unit 2, a front axle transmission unit 3 and a rear axle transmission unit 4 are installed;

[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 drivingly connected with the front axle transmission unit 3 and the rear axle transmission unit 4;

[0047] The front axle transmission unit 3 includes:

[0048] A front axle transmission box 31, which is fixedly installed inside the vehicle body 1, and a front axle transmission shaft assembly 33 is installed at both ends of the front axle transmission box 31, and the front axle transmission shaft assembly 33 is transmission-connected with the drive unit 2;

[0049] The air spring 35 is disposed above the front axle drive shaft assembly 33 and is used to realize adaptive adjustment of the height of the front axle. The air spring 35 is connected to the vehicle-mounted control system to automatically adjust the height of the front axle according to different road conditions. The vehicle-mounted control system is an existing mature technology and will not be described in detail in this embodiment.

[0050] The rear axle transmission unit 4 comprises:

[0051] A rear axle transmission box 41, which is fixedly installed inside the vehicle body 1, and a first rear axle transmission shaft 43 is installed at both ends of the rear axle transmission box 41, and the first rear axle transmission shaft 43 is transmission-connected to the drive unit 2;

[0052] 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 the worm wheel 47 is movably sleeved on the outer side of the end of the first rear axle drive shaft 43. The worm 49 is meshingly connected with the worm wheel 47, and the drive motor 48 is connected with the worm 49 to drive the worm wheel 47 to rotate, thereby realizing precise adjustment of the rear axle height, and automatically switching the rear axle height according to the water and land driving status by connecting with the vehicle-mounted control system.

[0053] During use, the drive 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 perform transmission, thereby realizing the vehicle body 1 to perform four-wheel drive driving on land. At the same time, the air spring 35 and the worm gear 47 can be used to adjust the height of the transmission parts of the front axle transmission shaft assembly 33 and the first rear axle transmission shaft 43 according to different road conditions, thereby realizing the adjustment of the height of the vehicle body 1 from the ground, which is convenient for adapting to different road conditions and different vehicle speeds.

[0054] When the driving motor 48 is working, it can drive the worm 49 to rotate, and then drive the worm wheel 47 to rotate accordingly. When the worm wheel 47 rotates, the rear axle rotating joint 46 on its side will move in an arc shape. At the same time, the rear axle upper swing arm 461, the rear axle lower swing arm 462, the rear axle shock absorber 463, the second rear axle drive shaft 44 and the third rear axle drive shaft 45 between the rear axle rotating joint 46 and the worm wheel 47 will move accordingly, thereby achieving their height adjustment.

[0055] Furthermore, the vehicle body 1 includes a streamlined body 11, a high-strength frame 12 and a hub-driven wheel 13. The streamlined body 11 is fixedly mounted on the outside of the high-strength frame 12, and the high-strength frame 12 is installed on the outside of the drive unit 2, the front axle transmission unit 3 and the rear axle transmission unit 4. The hub-driven wheel 13 is respectively connected to the front axle drive shaft assembly 33 and the first rear axle drive shaft 43. The hub-driven wheel 13 is a prior art, and a drive motor is built in its wheel hub, which can independently control the driving torque of each wheel according to driving requirements.

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

[0057] The hybrid power system includes an engine 21, a motor and a transfer case 22. The engine 21 and the motor are both connected to the transfer case 22 in a transmission manner. The engine 21 and the motor cooperate with the transfer case 22 to realize flexible distribution and switching of power.

[0058] A front axle transfer shaft 23, both ends of which are drivingly connected to a transfer case 22 and a front axle transmission unit 3;

[0059] The rear axle transfer shaft 25 has two ends which are respectively connected to the transfer case 22 and the rear axle transmission unit 4 in driving connection.

[0060] It is particularly disclosed that a retractable propeller 26 is installed inside the high-strength frame 12, and the end of the retractable propeller 26 extends outward through the streamlined body 11, and a jet pump drive shaft 24 is installed between the transfer case 22 and the retractable propeller 26, which is used to provide power when traveling on water, and the retraction and extension of the propeller and the power output are controlled by the vehicle-mounted control system.

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

[0062] Furthermore, a front axle transmission seat 32 is installed inside the front axle transmission box 31, and the front axle drive shaft assembly 33 is connected to the front axle transmission seat 32 through a universal joint to achieve angle adaptation between the front axle drive shaft assembly 33 and the front axle transmission seat 32. The other end of the front axle drive shaft assembly 33 extends outward and is connected to the front axle steering knuckle 34. An extension shaft 36 is installed inside the air spring 35, 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, adaptive adjustment of the front axle height can be achieved.

[0063] By utilizing the set air spring 35, when the air spring 35 is working, it can drive the extension shaft 36 to move vertically. When the extension shaft 36 moves downward, it can drive the front axle steering knuckle 34 to move downward. When the front axle steering knuckle 34 moves upward, it can drive the front axle steering knuckle 34 to move upward, so that the height of the front axle steering knuckle 34 can be freely adjusted.

[0064] Specifically disclosed, the front axle drive shaft assembly 33 includes a first front axle drive shaft 331, a second front axle drive shaft 332 and a third front axle drive shaft 333. The second front axle drive shaft 332 is connected to the front axle drive seat 32 through a universal joint, and the end of the third front axle drive shaft 333 passes through the front axle steering knuckle 34 and is connected to the hub drive wheel 13. The second front axle drive shaft 332 and the third front axle drive shaft 333 are connected through a constant velocity universal joint to ensure the transmission stability of the front axle drive shaft assembly 33 during steering and height adjustment.

[0065] The second front axle drive shaft 332 and the third front axle drive shaft 333 are connected via a constant velocity universal joint. When the height of the third front axle drive shaft 333 is adjusted, the second front axle drive shaft 332 can still achieve the transmission function after the angle is rotated. The end of the third front axle drive shaft 333 passes through the front axle steering knuckle 34 and is connected to the wheel hub driving wheel 13.

[0066] Furthermore, a front axle upper swing arm 38 and a front axle lower swing arm 39 are rotatably provided on the side of the front axle transmission box 31, and 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, and a fixing frame 37 is fixedly installed on the top of the front axle transmission box 31, and a front axle shock absorber 381 with adjustable damping is provided between the outer side of the fixing frame 37 and the front axle upper swing arm 38, 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 instructions of the vehicle 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 play a role in connecting and damping the front axle steering knuckle 34 and the front axle transmission box 31 during driving.

[0068] Specifically disclosed, a rear axle transmission seat 42 is installed inside the rear axle transmission box 41, and a first rear axle transmission shaft 43 is connected to the rear axle transmission seat 42 through a universal joint to achieve angle adaptation 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 transmission-connected to the second rear axle transmission shaft 44, the end of the second rear axle transmission shaft 44 is transmission-connected to the third rear axle transmission shaft 45, the other end of the third rear axle transmission shaft 45 is connected to the wheel hub driving wheel 13, and a rear axle rotating joint 46 is movably sleeved on the outer side of the third rear axle transmission shaft 45, a rear axle upper swing arm 461 and a rear axle lower swing arm 462 are respectively hinged between the side of the worm gear 47 and the top and bottom ends of the rear axle rotating joint 46, and a rear axle shock absorber 463 with adjustable damping is also arranged between the side of the worm gear 47 and the outer side of the rear axle rotating joint 46, 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 achieved.

[0069] Furthermore, the first rear axle drive shaft 43 and the second rear axle drive shaft 44, as well as the second rear axle drive shaft 44 and the third rear axle drive shaft 45 are connected via constant velocity universal joints, thereby ensuring smooth transmission of the rear axle drive shafts during height adjustment.

[0070] The second rear axle drive shaft 44 and the third rear axle drive shaft 45 are connected via a constant velocity universal joint, so that the angle and height of the second rear axle drive shaft 44 and the third rear axle drive shaft 45 can be adjusted easily.

[0071] Furthermore, the drive motor 48 is a brushless motor, and the speed and torque of the brushless motor 48 are precisely controlled by the vehicle control system, driving the worm 49 to rotate, and then driving the worm wheel 47 to rotate, thereby achieving 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.

[0072] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An amphibious vehicle with a liftable suspension, comprising a vehicle body (1), characterized in that: A drive unit (2), a front axle transmission unit (3) and a rear axle transmission unit (4) are installed inside the vehicle body (1); The front axle transmission unit (3) and the rear axle transmission unit (4) are respectively located at two ends of the drive unit (2), and the drive unit (2) is transmission-connected to the front axle transmission unit (3) and the rear axle transmission unit (4); The front axle transmission unit (3) comprises: A front axle transmission box (31), the front axle transmission box (31) is fixedly installed inside the vehicle body (1), both ends of the front axle transmission box (31) are installed with front axle transmission shaft assemblies (33), and the front axle transmission shaft assembly (33) is drivingly connected to the drive unit (2); An air spring (35), the air spring (35) is arranged above the front axle drive shaft assembly (33), and is used to realize adaptive adjustment of the height of the front axle, and is connected to the vehicle control system to automatically adjust the height of the front axle according to different road conditions; The rear axle transmission unit (4) comprises: A rear axle transmission box (41), the rear axle transmission box (41) is fixedly installed inside the vehicle body (1), and first rear axle transmission shafts (43) are installed at both ends of the rear axle transmission box (41), and the first rear axle transmission shaft (43) is drivingly connected to the drive unit (2); The electric worm gear lifting mechanism comprises a worm wheel (47), a worm (49) and a driving motor (48), wherein the worm wheel (47) is rotatably mounted inside a vehicle body (1), and the worm wheel (47) is movably sleeved on the outer side of the end of a first rear axle transmission shaft (43), the worm (49) is meshingly connected with the worm wheel (47), and the driving motor (48) is connected with the worm (49) to drive the worm wheel (47) 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 and land driving state by connecting with a vehicle-mounted control system.

2. The amphibious vehicle with a liftable suspension according to claim 1, characterized in that: The vehicle body (1) comprises a streamlined vehicle body (11), a high-strength vehicle frame (12) and a wheel hub driven wheel (13); the streamlined vehicle body (11) is fixedly sleeved on the outside of the high-strength vehicle frame (12), and the high-strength vehicle frame (12) is installed on the outside of a drive unit (2), a front axle transmission unit (3) and a rear axle transmission unit (4); the wheel hub driven wheel (13) is respectively connected to a front axle transmission shaft assembly (33) and a first rear axle transmission shaft (43) in a transmission manner; the wheel hub has a built-in drive motor, and the drive torque of each wheel can be independently controlled according to driving requirements.

3. The amphibious vehicle with a liftable suspension according to claim 2, characterized in that: The driving unit (2) comprises: A hybrid power system comprises an engine (21), an electric motor and a transfer case (22), wherein the engine (21) and the electric motor are both in transmission connection with the transfer case (22) to achieve flexible distribution and switching of power; A front axle transfer shaft (23), both ends of which are drivingly connected to a transfer case (22) and a front axle transmission unit (3); The rear axle transfer shaft (25) has two ends which are respectively connected in driving connection with the transfer case (22) and the rear axle transmission unit (4).

4. The amphibious vehicle with a liftable suspension according to claim 3, characterized in that: A retractable propeller (26) is installed inside the high-strength frame (12), and the end of the retractable propeller (26) extends outward through the streamlined body (11). A jet pump drive shaft (24) is installed between the transfer case (22) and the retractable propeller (26) for providing power when traveling on water, and the retraction and extension of the propeller and the power output are controlled by the vehicle-mounted control system.

5. The amphibious vehicle with a liftable suspension according to claim 3, characterized in that: A front axle transmission seat (32) is installed inside the front axle transmission box (31), and the front axle transmission shaft assembly (33) is connected to the front axle transmission seat (32) through a universal joint to achieve 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 to a front axle steering knuckle (34). An extension shaft (36) is installed inside the air spring (35), and the bottom end of the extension shaft (36) extends downward and is rotatably arranged on the top of the front axle steering knuckle (34). By controlling the air pressure in the air spring (35), self-adaptive adjustment of the height of the front axle can be achieved.

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

7. The amphibious vehicle with a liftable suspension according to claim 5, characterized in that: 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) on the side thereof, the other ends of the front axle upper swing arm (38) and the front axle lower swing arm (39) being respectively hinged to the bottom end of the extension shaft (36) and the bottom end of the front axle steering knuckle (34), a fixing frame (37) is fixedly installed on the top of the front axle transmission box (31), and a front axle shock absorber (381) with adjustable damping is provided between the outer side of the fixing frame (37) and the front axle upper swing arm (38), 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.

8. The amphibious vehicle with a liftable suspension according to claim 2, characterized in that: A rear axle transmission seat (42) is installed inside the rear axle transmission box (41); a first rear axle transmission shaft (43) is connected to the rear axle transmission seat (42) via a universal joint to achieve angle self-adaptation 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 transmission-connected to a second rear axle transmission shaft (44); the end of the second rear axle transmission shaft (44) is transmission-connected to a third rear axle transmission shaft (45); the other end of the third rear axle transmission shaft (45) is connected to a wheel hub driving wheel (1 3), and a rear axle rotating joint (46) is movably sleeved on the outer side of the third rear axle transmission shaft (45), a rear axle upper swing arm (461) and a rear axle lower swing arm (462) are respectively hinged between the side of the worm wheel (47) and the top and bottom ends of the rear axle rotating joint (46), and a rear axle shock absorber (463) with adjustable damping is also arranged between the side of the worm wheel (47) and the outer side of the rear axle rotating joint (46), and the electric worm gear lifting mechanism and the swing arm suspension system can realize accurate adjustment and buffering of the height of the rear axle.

9. The amphibious vehicle with a liftable suspension according to claim 8, 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 via constant velocity universal joints, thereby ensuring the transmission stability of the rear axle drive shafts during height adjustment.

10. The amphibious vehicle with a liftable suspension according to claim 1, characterized in that: The driving motor (48) is a brushless motor. The rotation speed and torque of the brushless motor (48) are precisely controlled by the vehicle-mounted control system to drive the worm (49) to rotate, thereby driving the worm wheel (47) to rotate, thereby achieving millimeter-level precise adjustment of the height of the rear axle, 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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