Amphibious vehicle suspension system

Abstract

The invention belongs to an amphibious vehicle suspension system in the technical field of amphibious vehicles. Comprising a plurality of axles, the axles at the front end of the bottom of a vehicle body adopt double-wishbone independent suspensions, the axles at the rear end of the bottom of the vehicle body adopt single-trailing-arm independent suspensions, water-jet propellers (5) are arranged at the positions of the axles at the rear end, the bottom end of a single-trailing-arm hydro-pneumatic spring (17) is connected with a single-trailing-arm G end (24), and the top end of the single-trailing-arm hydro-pneumatic spring (17) is connected with a rear frame (18); the rear axle comprises single-trailing-arm independent suspensions which are symmetrically arranged, and the water-jet propeller (5) is arranged between the single-trailing-arm independent suspensions which are symmetrically arranged and connected with the rear frame (18). The amphibious vehicle suspension system is simple in structure, and the arrangement requirement of the water-jet propeller is met in space; the wheels are lifted, so that the wheels are hidden in the vehicle body when the special vehicle runs on water, the resistance of the wheels and a chassis suspension is reduced, and the water running speed and performance are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of amphibious vehicles, and more specifically, relates to an amphibious vehicle suspension system. Background Art

[0002] Amphibious wheeled vehicles are favored for their high-speed mobility and strong long-distance raiding capabilities. Among them, vehicles with 8×8 chassis have become the mainstream development direction of amphibious wheeled vehicles due to their excellent carrying capacity and passability. However, there is no amphibious wheeled vehicle that has high passability in complex environments, high-speed maneuverability on land, high-speed navigation on water, and large load capacity. The water speed of amphibious wheeled vehicles has always been an important factor limiting their performance. When amphibious vehicles travel in water, they rely on the water propulsion system to provide forward power. Common forms of water propulsion include tire propulsion, track propulsion, propeller propulsion, water jet propulsion, etc. Water jet propulsion is more efficient at high speeds, has better anti-cavitation performance, shallow draft, and small appendage resistance. It is an advanced propulsion method that integrates propulsion and control and has the characteristics of the times. It has the advantages of strong adaptability to variable working conditions and good control performance, which meets the increasing requirements of amphibious vehicles for indicators such as speed, quietness and maneuverability. At present, water jet propulsion is the mainstream form in the water jet propulsion family, and underwater water jet propulsion is more efficient. However, it occupies a large space and is located at the rear end of the chassis, which has a great impact on the chassis suspension structure. On the one hand, the large space it occupies is not conducive to layout, and on the other hand, the layout will affect the layout of other components.

[0003] In the prior art, there is a technology named "Suspension mechanism and amphibious vehicle" and the publication number is "CN215705519U", which provides a suspension mechanism and an amphibious vehicle, wherein the suspension mechanism includes: a load-bearing bracket; a swing cylinder, which is arranged on the load-bearing bracket; a rocker arm, one end of which is connected to the swing cylinder; a gas spring, one end of which is connected to the other end of the rocker arm; a wheel, which is connected to the other end of the gas spring, the rocker arm rotates to the first position, the length of the gas spring is the first length, the height of the wheel is the largest, and it is in a water driving state; the rocker arm rotates to the second position, the length of the gas spring is the second length, the height of the wheel is in the middle position, and the wheel is in a land driving state. In the technical solution of the present invention, a swing cylinder is used as a driving source for wheel retraction and extension, which has a compact layout, greater power, precise swing angle, simple structure, and no need to add additional deceleration and limiting mechanisms. In addition, the gas spring, as a load-bearing and shock-absorbing device, can provide a larger retraction and extension stroke, which is convenient for retracting or lowering the wheel, and is conducive to adjusting the posture of the whole vehicle. However, the technology does not involve the technical problems and technical solutions of the present application. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the shortcomings of the existing technology, a suspension system for an amphibious vehicle is provided which has a simple structure and can meet the spatial layout requirements of a water jet propulsion system; the wheels can be lifted so that the wheels are hidden in the vehicle body when the special vehicle is traveling on water, thereby reducing the resistance of the wheels and chassis suspension and improving the speed and performance of traveling on water.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0006] The present invention is an amphibious vehicle suspension system, comprising a plurality of axles, wherein a plurality of axles at the front end of the bottom of the vehicle body adopt a double wishbone independent suspension, and a plurality of axles at the rear end of the bottom of the vehicle body adopt a single longitudinal arm independent suspension, and water jet propulsion devices are arranged at a plurality of axle positions at the rear end, and the single longitudinal arm independent suspension comprises a single longitudinal arm oil-gas spring and a single longitudinal arm body 20, and the single longitudinal arm H end of the single longitudinal arm independent suspension is movably connected to a rear frame, and the single longitudinal arm F end 22 is connected to a wheel hub 23; the bottom end of the single longitudinal arm oil-gas spring is connected to the single longitudinal arm G end 24, and the top end of the single longitudinal arm oil-gas spring 17 is connected to a rear frame 18; the rear axles respectively comprise symmetrically arranged single longitudinal arm independent suspensions, and the water jet propulsion devices 5 are arranged between the symmetrically arranged single longitudinal arm independent suspensions, and the water jet propulsion devices 5 are connected to the rear frame.

[0007] The double wishbone independent suspension comprises a double wishbone oil-gas spring, an upper wishbone, a lower wishbone, an upper main shaft, a lower main shaft and a steering knuckle. The upper wishbone A end of the double wishbone independent suspension is connected to the front frame, and the upper wishbone B end is connected to the steering knuckle; the lower wishbone D end is connected to the front frame, and the lower wishbone E end is connected to the steering knuckle; the upper end of the double wishbone oil-gas spring is connected to the front frame, and the lower end of the double wishbone oil-gas spring is connected to the lower wishbone C end. The front axle comprises a symmetrically arranged double wishbone independent suspension, and the steering rod is connected to the steering knuckle.

[0008] The axles include a first axle, a second axle, a third axle and a fourth axle, and the first axle, the second axle, the third axle and the fourth axle are arranged with gaps from the front end position of the bottom of the vehicle body to the rear end position of the bottom of the vehicle body.

[0009] The first axle and the second axle adopt double wishbone independent suspension, and the third axle and the fourth axle adopt single longitudinal arm independent suspension; water jet propulsion devices are arranged at the third axle and the fourth axle, and the water jet propulsion devices include multiple ones.

[0010] The A end of the upper swing arm is connected to the front frame through the upper swing arm fixing pin, and the B end of the upper swing arm is connected to the steering knuckle through the upper main shaft; the D end of the lower swing arm is connected to the front frame through the lower swing arm fixing pin, and the E end of the lower swing arm is connected to the steering knuckle through the lower main shaft; the upper end of the double swing arm oil and gas spring is connected to the front frame through the oil and gas spring fixing pin, and the lower end of the double swing arm oil and gas spring is connected to the C end of the lower swing arm through the oil and gas spring fixing pin; the steering rod is movably hinged to the steering knuckle.

[0011] The H end of the single longitudinal arm is connected to the rear frame through a single longitudinal arm fixing pin, and the F end of the single longitudinal arm is connected to the wheel hub by a high-strength bolt.

[0012] When the amphibious vehicle travels on water, the single longitudinal arm oil and gas spring contracts, and the single longitudinal arm body 20 is configured to be able to rotate around the single longitudinal arm fixed pin shaft, driving the wheel on the wheel hub 23 of the single longitudinal arm independent suspension to lift upward.

[0013] When the amphibious vehicle travels on water, the double swing arm oil-gas spring contracts, and the double swing arm oil-gas spring pulls the C end of the lower swing arm to lift upward, the A end of the upper swing arm is configured to be able to rotate around the upper swing arm fixed pin shaft, and the D end of the lower swing arm is configured to be able to rotate around the lower swing arm fixed pin shaft, thereby driving the wheel on the wheel hub of the double longitudinal arm independent suspension to lift upward.

[0014] The upper swing arm of the double wishbone independent suspension is a double A-arm structure of unequal length, and the lower swing arm is a double A-arm structure of unequal length, and the size of the upper swing arm is smaller than that of the lower swing arm.

[0015] The upper swing arm and the lower swing arm of the double swing arm body of the double wishbone independent suspension are an integrated structure, and the upper swing arm and the lower swing arm are forged from titanium alloy; the single longitudinal arm body of the single longitudinal arm independent suspension is forged from titanium alloy.

[0016] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0017] The amphibious vehicle suspension system of the present invention adopts double wishbone independent suspension (such as the first axle and the second axle) at the front end of the bottom of the vehicle body, and adopts single longitudinal arm independent suspension (such as the third axle and the fourth axle) at the rear end of the bottom of the vehicle body. In this way, the independent suspension structure is designed with two different independent suspensions, and the single longitudinal arm independent suspension can reliably meet the spatial arrangement of the water jet propulsion device, and the independent suspension structure of the double wishbone independent suspension plus the single longitudinal arm independent suspension can ensure the passability, high-speed maneuverability and high load-bearing capacity in the complex environment on land. When the special vehicle is traveling on water, when the single longitudinal arm oil and gas spring contracts, the single longitudinal arm body rotates around the single longitudinal arm fixed pin shaft, which can make the wheel installed on the wheel hub lift up, reduce the water resistance, and improve the water maneuverability of the amphibious vehicle. When the vehicle needs to travel to land, the single longitudinal arm oil and gas spring extends, and the single longitudinal arm body rotates in another direction around the single longitudinal arm fixed pin shaft, which can make the wheel installed on the wheel hub fall down, and the amphibious vehicle meets the maneuverability of driving on land. When the special vehicle is traveling on water, the whole vehicle floats on the water, the double wishbone oil-gas spring contracts, and the double wishbone oil-gas spring pulls the C end of the lower swing arm upward, and the A end of the upper swing arm and the D end of the lower swing arm rotate on the fixed pin shaft, so that the wheels installed on the wheel hub of the axle at the front position are lifted upward, reducing water resistance and improving the water maneuverability of the amphibious vehicle. When the vehicle needs to drive to land, the double wishbone oil-gas spring extends, and the A end of the upper swing arm and the D end of the lower swing arm rotate in the other direction on the fixed pin shaft, so that the wheels installed on the wheel hub of the axle at the front position fall downward, and the amphibious vehicle meets the maneuverability of driving on land. When the vehicle is turned, the steering rod is pulled by the steering system, pulling the steering knuckle to rotate around the upper spindle and the lower spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and symbols in the drawings of this specification:

[0019] Figure 1 It is a schematic diagram of the overall arrangement structure of the amphibious vehicle suspension system of the present invention;

[0020] Figure 2-1 It is a schematic structural diagram of a double wishbone independent suspension of an amphibious vehicle suspension system according to the present invention;

[0021] Figure 2-2 It is a schematic structural diagram of a double wishbone independent suspension of an amphibious vehicle suspension system according to the present invention;

[0022] Figure 3-1 It is a schematic diagram of the upper swing arm structure of the double wishbone independent suspension of the amphibious vehicle suspension system of the present invention;

[0023] Figure 3-2 It is a schematic structural diagram of a lower arm of a double wishbone independent suspension of an amphibious vehicle suspension system according to the present invention;

[0024] Figure 4 It is a structural schematic diagram of a single trailing arm independent suspension of an amphibious vehicle suspension system according to the present invention;

[0025] Figure 5 It is a structural schematic diagram of a single trailing arm body of an amphibious vehicle suspension system according to the present invention;

[0026] The accompanying drawings are marked as follows: 1, first axle, 2, second axle, 3, third axle, 4, fourth axle, 5, water jet propulsion, 6, double wishbone oil and gas spring, 7, upper swing arm, 8, front frame, 9, oil and gas spring fixing pin, 10, upper swing arm fixing pin, 11, lower swing arm fixing pin, 12, lower swing arm, 13, upper spindle, 14, lower spindle, 15, steering knuckle, 16, steering tie rod , 17. Single longitudinal arm oil-gas spring, 18. Rear frame, 19. Single longitudinal arm fixing pin, 20. Single longitudinal arm body; 21. Single longitudinal arm H end; 22. Single longitudinal arm F end; 23. Wheel hub; 24. Single longitudinal arm G end; 25. Upper swing arm A end; 26. Upper swing arm B end; 27. Lower swing arm D end; 28. Lower swing arm E end; 29. ​​Lower swing arm C end; 30. High-strength bolts; 31. Wheel. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0028] As attached Figure 1 -Attached Figure 5As shown, the present invention is an amphibious vehicle suspension system, including multiple axles, multiple axles at the front end of the bottom of the vehicle body adopt double wishbone independent suspension, multiple axles at the rear end of the bottom of the vehicle body adopt single longitudinal arm independent suspension, water jet propulsion 5 is arranged at multiple axle positions at the rear end, the single longitudinal arm independent suspension includes a single longitudinal arm oil and gas spring 17, a single longitudinal arm body 20, the single longitudinal arm H end 21 of the single longitudinal arm independent suspension is movably connected to the rear frame 18, and the single longitudinal arm F end 22 is connected to the wheel hub 23; the bottom end of the single longitudinal arm oil and gas spring 17 is connected to the single longitudinal arm G end 24, and the top end of the single longitudinal arm oil and gas spring 17 is connected to the rear frame 18; the rear axles respectively include symmetrically arranged single longitudinal arm independent suspensions, the water jet propulsion 5 is arranged between the symmetrically arranged single longitudinal arm independent suspensions, and the water jet propulsion 5 is connected to the rear frame 18. The above structure proposes an improved technical solution for the deficiencies in the prior art. Multiple axles at the front end of the bottom of the vehicle body adopt double wishbone independent suspension (such as the first axle and the second axle), and multiple axles at the rear end of the bottom of the vehicle body adopt single longitudinal arm independent suspension (such as the third axle and the fourth axle). In this way, the independent suspension structure is designed with two different independent suspensions, and the single longitudinal arm independent suspension can reliably meet the spatial arrangement of the water jet propulsion device, and the independent suspension structure of the double wishbone independent suspension plus the single longitudinal arm independent suspension can ensure the passability, high-speed maneuverability and high load-bearing capacity in the complex environment on land. When the special vehicle is traveling on water, when the single longitudinal arm oil and gas spring 17 is contracted, the single longitudinal arm body rotates around the single longitudinal arm fixed pin shaft, which can make the wheel 31 installed on the wheel hub 23 lift upward, reduce water resistance, and improve the water maneuverability of the amphibious vehicle. When the vehicle needs to travel to land, the single longitudinal arm oil and gas spring 17 is extended, and the single longitudinal arm body 20 rotates in another direction around the single longitudinal arm fixed pin shaft, which can make the wheel 31 installed on the wheel hub 23 fall downward, and the amphibious vehicle meets the maneuverability of driving on land. When the special vehicle is traveling on water, the whole vehicle floats on the water. At this time, the double wishbone oil-gas spring contracts, and the double wishbone oil-gas spring pulls the lower swing arm C end upward, and the upper swing arm A end and the lower swing arm D end rotate on the fixed pin shaft, which can make the wheel installed on the wheel hub of the axle at the front position lift upward, reduce water resistance, and improve the water maneuverability of the amphibious vehicle. When the vehicle needs to travel on land, when the double wishbone oil-gas spring is extended, the upper swing arm A end and the lower swing arm D end rotate in the other direction on the fixed pin shaft, which can make the wheel 31 installed on the wheel hub 23 of the axle at the front position fall downward, and the amphibious vehicle meets the maneuverability of driving on land. When the vehicle is turned, the steering tie rod 16 is subjected to the pulling force from the steering system, pulling the steering knuckle to rotate around the upper spindle and the lower spindle. The amphibious vehicle suspension system described in the present invention has a simple structure and can meet the spatial layout requirements of the water jet propulsion system; the wheels are lifted so that the wheels are hidden in the vehicle body when the special vehicle is traveling on water, reducing the resistance of the wheels and chassis suspension and improving the speed and performance of traveling on water.

[0029] The double wishbone independent suspension comprises a double wishbone oil-gas spring 6, an upper wishbone 7, a lower wishbone 12, an upper spindle 13, a lower spindle 14 and a steering knuckle 15. The upper wishbone A end 25 of the double wishbone independent suspension is connected to the front frame 8, the upper wishbone B end 26 is connected to the steering knuckle 15; the lower wishbone D end 27 is connected to the front frame 8, and the lower wishbone E end 28 is connected to the steering knuckle 15; the upper end of the double wishbone oil-gas spring 6 is connected to the front frame 8, the lower end of the double wishbone oil-gas spring 6 is connected to the lower wishbone C end 29, the front axle comprises a symmetrically arranged double wishbone independent suspension, and the steering tie rod 16 is connected to the steering knuckle 15. With the above structure, the whole special vehicle floats on the water. When driving on the water, the double wishbone oil-gas spring contracts, the double wishbone oil-gas spring pulls the lower wishbone C end upward, and the upper wishbone A end and the lower wishbone D end rotate on the fixed pin shaft to lift the wheel upward. The double wishbone and double main axle design enables the vehicle to absorb impact forces from different directions when encountering uneven roads, and the vehicle can demonstrate good stability on complex road conditions.

[0030] The axles include a first axle 1, a second axle 2, a third axle 3, and a fourth axle 4, and the first axle 1, the second axle 2, the third axle 3, and the fourth axle 4 are arranged in a gap from the front end position of the bottom of the vehicle body to the rear end position of the bottom of the vehicle body. The first axle 1 and the second axle 2 adopt a double wishbone independent suspension, and the third axle 3 and the fourth axle 4 adopt a single longitudinal arm independent suspension; the water jet propulsion device 5 is arranged at the third axle 3 and the fourth axle 4, and the water jet propulsion device 5 includes multiple. The above structure, as a specific embodiment, the first axle and the second axle adopt a double wishbone independent suspension, and the third axle and the fourth axle adopt a single longitudinal arm independent suspension, and the water jet propulsion device is arranged between the third axle and the fourth axle. In this way, the independent suspension structure is designed with two different independent suspensions, and the single longitudinal arm independent suspension can reliably meet the spatial arrangement of the water jet propulsion device, and the independent suspension structure of the double wishbone independent suspension plus the single longitudinal arm independent suspension can ensure the passability, high-speed maneuverability and high load-bearing capacity in a complex land environment.

[0031] The upper swing arm A end 25 is connected to the front frame 8 through the upper swing arm fixed pin shaft 10, and the upper swing arm B end 26 is connected to the steering knuckle 15 through the upper main shaft 13; the lower swing arm D end 27 is connected to the front frame 8 through the lower swing arm fixed pin shaft 11, and the lower swing arm E end 28 is connected to the steering knuckle 15 through the lower main shaft 14; the upper end of the double swing arm oil and gas spring 6 is connected to the front frame 8 through the oil and gas spring fixed pin shaft 9, and the lower end of the double swing arm oil and gas spring 6 is connected to the lower swing arm C end 29 through the oil and gas spring fixed pin shaft; the steering tie rod 16 is movably hinged to the steering knuckle 15. The above structure realizes the active connection of related components through the pin shaft to ensure that the related components can realize reliable rotation.

[0032] The H end 21 of the single longitudinal arm is connected to the rear frame 18 through the single longitudinal arm fixing pin 19, and the F end 22 of the single longitudinal arm is connected to the wheel hub 23 by a high-strength bolt 30. In the above structure, the single longitudinal arm body is directly connected to the rear frame 18 and the wheel hub 23, which can reduce the roll of the vehicle when turning, avoid the risk of vehicle rollover, and ensure the driving stability of the vehicle; because the designed single longitudinal arm body occupies a small space, more space can be reserved for arranging the water jet propulsion.

[0033] When the amphibious vehicle travels on water, the single longitudinal arm oil and gas spring 17 contracts, and the single longitudinal arm body 20 is configured to be able to rotate around the single longitudinal arm fixed pin 19, driving the wheel on the wheel hub 23 of the single longitudinal arm independent suspension to lift upward. The above structure lifts the wheel upward when the special vehicle travels on water, reduces water resistance, and improves water maneuverability.

[0034] When the amphibious vehicle travels on water, the double swing arm oil-gas spring 6 contracts, and the double swing arm oil-gas spring 6 pulls the lower swing arm C end 29 to lift upward, the upper swing arm A end 25 is configured to be able to rotate around the upper swing arm fixed pin 10, and the lower swing arm D end 27 is configured to be able to rotate around the lower swing arm fixed pin 11, driving the wheel on the wheel hub 23 of the double trailing arm independent suspension to lift upward. The above structure, when the special vehicle travels on water, causes the wheel to lift upward and be stowed inside the vehicle body, thereby reducing water resistance and improving water maneuverability.

[0035] The upper swing arm 7 of the double wishbone independent suspension is a double A-arm structure of unequal length, and the lower swing arm 12 is a double A-arm structure of unequal length, and the upper swing arm 7 is smaller than the lower swing arm 12. The upper swing arm 7 and the lower swing arm 12 of the double swing arm body of the double wishbone independent suspension are an integrated structure, and the upper swing arm 7 and the lower swing arm 12 are forged from titanium alloy; the single longitudinal arm body 20 of the single longitudinal arm independent suspension is forged from titanium alloy. In the above structure, the upper swing arm and the lower swing arm of the double wishbone independent suspension are double A-arm structures of unequal length, and the upper swing arm 7 is shorter than the lower swing arm 12, and its appearance structure is as follows: Figure 3-1 , Figure 3-2 As shown in the figure, the upper and lower swing arms are made of titanium alloy forging, and CAE strength analysis confirms that they meet the strength requirements of the operating conditions. Compared with steel with the same strength requirements, their weight can be reduced by 40%, meeting the lightweight requirements. In addition, titanium alloy materials have good corrosion resistance and are not easily reduced in structural strength due to rust. Figure 5 As shown, the single longitudinal arm material is forged from titanium alloy, and through CAE strength analysis, it meets the strength requirements of the operating conditions. Compared with steel with the same strength requirements, its weight can be reduced by 40%, meeting the lightweight requirements. In addition, titanium alloy materials have good corrosion resistance and are not easily reduced in structural strength due to rust.

[0036] The amphibious vehicle suspension system of the present invention adopts double wishbone independent suspension (such as the first axle and the second axle) at the front end of the bottom of the vehicle body, and adopts single longitudinal arm independent suspension (such as the third axle and the fourth axle) at the rear end of the bottom of the vehicle body. In this way, the independent suspension structure is designed with two different independent suspensions, and the single longitudinal arm independent suspension can reliably meet the spatial arrangement of the water jet propulsion device, and the independent suspension structure of the double wishbone independent suspension plus the single longitudinal arm independent suspension can ensure the passability, high-speed maneuverability and high load-bearing capacity in the complex environment on land. When the special vehicle is traveling on water, when the single longitudinal arm oil and gas spring contracts, the single longitudinal arm body rotates around the single longitudinal arm fixed pin shaft, which can make the wheel installed on the wheel hub lift up, reduce the water resistance, and improve the water maneuverability of the amphibious vehicle. When the vehicle needs to travel to land, the single longitudinal arm oil and gas spring extends, and the single longitudinal arm body rotates in another direction around the single longitudinal arm fixed pin shaft, which can make the wheel installed on the wheel hub fall down, and the amphibious vehicle meets the maneuverability of driving on land. When the special vehicle is traveling on water, the whole vehicle floats on the water, the double wishbone oil-gas spring contracts, and the double wishbone oil-gas spring pulls the C end of the lower swing arm upward, and the A end of the upper swing arm and the D end of the lower swing arm rotate on the fixed pin shaft, so that the wheels installed on the wheel hub of the axle at the front position are lifted upward, reducing water resistance and improving the water maneuverability of the amphibious vehicle. When the vehicle needs to drive to land, the double wishbone oil-gas spring extends, and the A end of the upper swing arm and the D end of the lower swing arm rotate in the other direction on the fixed pin shaft, so that the wheels installed on the wheel hub of the axle at the front position fall downward, and the amphibious vehicle meets the maneuverability of driving on land. When the vehicle is turned, the steering rod is pulled by the steering system, pulling the steering knuckle to rotate around the upper spindle and the lower spindle.

[0037] To sum up, the amphibious vehicle suspension system described in the present invention adopts a double suspension system with different structures in the overall layout. The single longitudinal arm independent suspension occupies a small space and can meet the spatial arrangement of the underwater water jet propulsion device near the position of the single longitudinal arm independent suspension system; in order to achieve high-speed driving on water, both the single longitudinal arm independent suspension and the double wishbone independent suspension can be lifted, so that when the vehicle is driving on water, the wheels can be hidden in the vehicle body, reducing the resistance of the wheels when driving on water; and the key swing arm of the double wishbone independent suspension adopts a design combining unequal length double A structure and upper and lower main shafts, which can buffer the force of vehicle body bumps on complex roads; the actual solution of the single longitudinal arm can control the roll of the vehicle when turning and avoid the risk of vehicle rollover. The swing arm material is forged with titanium alloy, which meets the strength requirements of the working conditions and the lightweight requirements, and the titanium alloy material has good corrosion resistance and is not easy to reduce the structural strength due to rust.

[0038] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An amphibious vehicle suspension system, characterized in that: The vehicle comprises a plurality of axles, wherein the plurality of axles at the front end of the bottom of the vehicle body adopts a double wishbone independent suspension, and the plurality of axles at the rear end of the bottom of the vehicle body adopts a single longitudinal arm independent suspension. A water jet propulsion device (5) is arranged at the plurality of axle positions at the rear end. The single longitudinal arm independent suspension comprises a single longitudinal arm oil-gas spring (17) and a single longitudinal arm body (20). The single longitudinal arm H end (21) of the single longitudinal arm independent suspension is movably connected to a rear vehicle frame (18), and the single longitudinal arm F end (22) is connected to a wheel hub (23); the bottom end of the single longitudinal arm oil-gas spring (17) is connected to the single longitudinal arm G end (24), and the top end of the single longitudinal arm oil-gas spring (17) is connected to the rear vehicle frame (18); the rear axles respectively comprise symmetrically arranged single longitudinal arm independent suspensions, the water jet propulsion device (5) is arranged between the symmetrically arranged single longitudinal arm independent suspensions, and the water jet propulsion device (5) is connected to the rear vehicle frame (18).

2. The amphibious vehicle suspension system according to claim 1, characterized in that: The double wishbone independent suspension comprises a double wishbone oil-gas spring (6), an upper wishbone (7), a lower wishbone (12), an upper main shaft (13), a lower main shaft (14) and a steering knuckle (15); the upper wishbone arm A end (25) of the double wishbone independent suspension is connected to the front frame (8), and the upper wishbone arm B end (26) is connected to the steering knuckle (15); the lower wishbone arm D end (27) is connected to the front frame (8), and the lower wishbone arm E end (28) is connected to the steering knuckle (15); the upper end of the double wishbone oil-gas spring (6) is connected to the front frame (8), and the lower end of the double wishbone oil-gas spring (6) is connected to the lower wishbone arm C end (29); the front axle comprises a symmetrically arranged double wishbone independent suspension, and the steering tie rod (16) is connected to the steering knuckle (15).

3. The amphibious vehicle suspension system according to claim 1 or 2, characterized in that: The axles include a first axle (1), a second axle (2), a third axle (3), and a fourth axle (4). The first axle (1), the second axle (2), the third axle (3), and the fourth axle (4) are arranged with gaps from the front end position of the bottom of the vehicle body to the rear end position of the bottom of the vehicle body.

4. The amphibious vehicle suspension system according to claim 3, characterized in that: The first axle (1) and the second axle (2) adopt double wishbone independent suspension, and the third axle (3) and the fourth axle (4) adopt single longitudinal arm independent suspension; the water jet propulsion device (5) is arranged at the position of the third axle (3) and the fourth axle (4), and the water jet propulsion device (5) includes a plurality of water jet propulsion devices.

5. The amphibious vehicle suspension system according to claim 2, characterized in that: The upper swing arm A end (25) is connected to the front frame (8) through the upper swing arm fixing pin shaft (10), and the upper swing arm B end (26) is connected to the steering knuckle (15) through the upper main shaft (13); the lower swing arm D end (27) is connected to the front frame (8) through the lower swing arm fixing pin shaft (11), and the lower swing arm E end (28) is connected to the steering knuckle (15) through the lower main shaft (14); the upper end of the double swing arm oil and gas spring (6) is connected to the front frame (8) through the oil and gas spring fixing pin shaft (9), and the lower end of the double swing arm oil and gas spring (6) is connected to the lower swing arm C end (29) through the oil and gas spring fixing pin shaft; the steering tie rod (16) is movably hinged to the steering knuckle (15).

6. The amphibious vehicle suspension system according to claim 1 or 2, characterized in that: The H end (21) of the single longitudinal arm is connected to the rear frame (18) via a single longitudinal arm fixing pin (19), and the F end (22) of the single longitudinal arm is connected to the wheel hub (23) via a high-strength bolt (30).

7. The amphibious vehicle suspension system according to claim 1 or 2, characterized in that: When the amphibious vehicle travels on water, the single longitudinal arm oil and gas spring (17) contracts, and the single longitudinal arm body (20) is configured to be able to rotate around the single longitudinal arm fixed pin shaft (19), thereby driving the wheel on the wheel hub (23) of the single longitudinal arm independent suspension to lift upward.

8. The amphibious vehicle suspension system according to claim 2, characterized in that: When the amphibious vehicle travels on water, the double swing arm oil-gas spring (6) contracts, and the double swing arm oil-gas spring (6) pulls the lower swing arm C end (29) to lift upward, the upper swing arm A end (25) is configured to be able to rotate around the upper swing arm fixed pin shaft (10), and the lower swing arm D end (27) is configured to be able to rotate around the lower swing arm fixed pin shaft (11), thereby driving the wheel on the wheel hub (23) of the double trailing arm independent suspension to lift upward.

9. The amphibious vehicle suspension system according to claim 2, characterized in that: The upper swing arm (7) of the double wishbone independent suspension is a double A-arm structure of unequal lengths, and the lower swing arm (12) is a double A-arm structure of unequal lengths, and the size of the upper swing arm (7) is smaller than that of the lower swing arm (12).

10. The amphibious vehicle suspension system according to claim 2, characterized in that: The upper swing arm (7) and the lower swing arm (12) of the double swing arm body of the double wishbone independent suspension are an integrated structure, and the upper swing arm (7) and the lower swing arm (12) are forged from titanium alloy; the single longitudinal arm body (20) of the single longitudinal arm independent suspension is forged from titanium alloy.

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