Amphibious vehicle spare tire and sailing propulsion device

Abstract

The invention belongs to an amphibious vehicle spare tire and a sailing propulsion device in the technical field of amphibious vehicles. A servo motor (2-1) of the switching device (2) is connected with a screw rod (2-4), a connecting piece (2-3) is sleeved on the screw rod (2-4), a driving motor (2-5) is arranged at one end of the connecting piece (2-3), a connecting part (2-2) is connected with an upper positioning part (2-6) and a lower positioning part (2-7), the other end of the connecting piece (2-3) is clamped with the connecting part (2-2), and the screw rod (2-4) movably penetrates through the lower positioning part (2-7). And a propelling propeller (3-2) of the spare tire / sailing propelling device (3) is positioned on the inner ring of the tire (3-1). According to the amphibious vehicle spare tire and sailing propulsion device, the structure is simple, switching between the spare tire and the sailing propeller can be achieved, land operation of the vehicle is not affected when the spare tire is switched to the sailing propeller, the caster angle of the vehicle in water is increased when the sailing propeller is switched to the sailing propeller, meanwhile, water resistance is reduced, and the trafficability of the vehicle in water is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of amphibious vehicles, and more specifically, relates to a spare tire and a navigation propulsion device of an amphibious vehicle. Background Art

[0002] In vehicles, spare tires are usually used in emergencies and stored in the trunk or bottom of the vehicle. When the main tire is damaged, the driver needs to stop the car to replace it. However, this spare tire is idle in most cases, and its space and weight resources are not fully utilized. At the same time, for some special-purpose vehicles, such as amphibious vehicles such as floating vehicles on water, higher requirements are placed on propulsion capabilities in specific environments (such as waters). In summary, the defects of the prior art are: 1. Traditional spare tires are idle in most cases, and their space and weight resources are not fully utilized; 2. Traditional spare tires cannot provide vehicles with propulsion capabilities in specific environments (such as waters).

[0003] The prior art has a technology named "spare tire installation structure" and a publication (announcement) number "CN102470895A", in which the rim width (1) between the inner rim collar (17a) and the outer rim collar (18a) of the spare tire wheel (11) is substantially equal to the general total height (h1) of the tire body (12) placed substantially horizontally. The inner rim collar (17a) and the outer rim collar (18a) are respectively arranged on the inner drum part (17) and the outer drum part (18), and the inner drum part (17) and the outer drum part (18) are joined at a joint (19). The position of the joint is adjacent to the upper surface of the rear cross member (6) in the vertical direction of the vehicle. The wheel crack promotion member (20) protrudes from the rear surface (6a) of the rear cross member toward the spare tire installation area (9), and its acute angle end (20a) faces the inner drum part (17). When the spare wheel (11) is broken by the rear cross member (6) at the joint (19), the wheel breakage promoting member (20) easily deforms the inner drum part (17). However, this 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 prior art, a spare tire and a navigation propulsion device for an amphibious vehicle is provided, which has a simple structure and can realize switching between a spare tire and a navigation propulsion device. When switching to a spare tire, it does not affect the vehicle's movement on land. When switching to a propeller, it increases the vehicle's rearward tilt angle in water, while reducing water resistance and improving the vehicle's passability in water.

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

[0006] The present invention is a spare tire and navigation propulsion device for an amphibious vehicle. The switching device comprises a servo motor, a connecting component, a coupling, a screw rod, and a drive motor. The servo motor is connected to the screw rod, a coupling component is mounted on the screw rod, a drive motor is arranged at one end of the coupling component, the connecting component connects an upper positioning part and a lower positioning part, the connecting component is clamped at the other end of the coupling component, the screw rod movably passes through the lower positioning part, and the spare tire / navigation propulsion device comprises a wheel hub, a tire and a propulsion propeller, and the propulsion propeller is located at the inner ring of the tire.

[0007] The screw rod is screwed to connect the screw hole of the connecting piece.

[0008] The wheel hub of the spare tire / sailing propulsion device is provided with a mounting opening, and the rear part of the vehicle body is provided with a plurality of mounting screw holes.

[0009] The length of the motor shaft of the driving motor is greater than the sum of the thicknesses of the wheel hub and the propulsion propeller, and the motor shaft includes a threaded portion; the motor shaft passes through the wheel hub and is connected to the propulsion propeller, and a nut is screwed onto the threaded portion at the end of the motor shaft.

[0010] The servo motor is fixedly connected to the upper end of the upper positioning part through bolts, and the motor shaft of the servo motor is fixedly connected to the upper end of the screw rod.

[0011] The connecting component is fixedly connected to the mounting screw hole by means of bolts.

[0012] The front end of the driving motor is provided with a spare tire / sailing propulsion device positioning block and a spare tire / sailing propulsion device mounting screw hole, and a positioning groove is provided on the wheel hub.

[0013] When the servo motor drives the lead screw to rotate in one direction, the lead screw is configured to be a structure capable of driving the connecting piece to move downward.

[0014] When the servo motor drives the lead screw to rotate in another direction, the lead screw is configured to be a structure capable of driving the connecting piece to move upward.

[0015] The connecting component is fixedly connected with the upper positioning part and the lower positioning part by bolts, and the connecting piece is movably clamped in the connecting component.

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

[0017] The spare tire and navigation propulsion device of the amphibious vehicle described in the present invention are respectively provided with a switching device and a spare tire / navigation propulsion device. The switching device is used for switching the vehicle between land and water, and the spare tire / navigation propulsion device is used for the power propulsion of the vehicle traveling on the water. The switching device includes a servo motor, a connecting component, a coupling, a screw, and a driving motor. The servo motor is connected to the screw. The servo motor can drive the screw to rotate when controlling the rotation. The coupling is mounted on the screw. When the screw rotates, it acts on the coupling to realize the lifting action of the coupling. The lifting of the coupling drives the driving motor to lift. A driving motor is arranged at one end of the coupling, and the connecting component connects the upper positioning part and the lower positioning part. The connecting component is clamped at the other end of the coupling. The screw moves through the lower positioning part. The coupling limits the coupling to ensure that under the drive of the screw, the coupling can only be lifted up and down relative to the screw without rotating. The spare tire / navigation propulsion device includes a wheel hub, a tire, and a propulsion propeller. The propulsion propeller is located at the inner ring of the tire. The wheel hub is used to install the tire, and the propulsion propeller is connected to the driving motor. When the driving motor is controlled to rotate, the driving motor can drive the propulsion propeller to rotate. In this way, when the amphibious vehicle needs to travel on land, the control screw is rotated in one direction, and the screw drives the coupling to rise to the highest position, then the spare tire / navigation propulsion device rises to the highest position, will not touch the ground, and will not affect the vehicle's land travel. The wheel hub and the tire are connected to form a tire, and the tire is connected to the driving motor through the wheel hub, so that the tire and the switching device are fixedly connected, and it can be easily connected and disassembled, and used as a spare tire. When the amphibious vehicle needs to travel on the water, the control screw is rotated in another direction, and the screw drives the coupling to drop to the lowest position, then the spare tire / navigation propulsion device drops below the water surface, and then the control drive motor is started, and the driving motor drives the propulsion propeller to rotate, generating power, and realizing the vehicle's water surface travel propulsion. In the structure of the present invention, the vehicle body is connected to the switching device, and the switching device drives the coupling to move up and down relative to the screw through the servo motor, one end of the coupling is connected to the driving motor by bolts, and the front end of the driving motor is connected to the tire by bolts, and the propulsion propeller is located inside the tire and fixedly connected to the end of the driving motor shaft. When an amphibious vehicle enters the water, the switching device controls the spare tire to the lowest point through the servo motor to ensure that the spare tire is immersed in the water, and drives the propulsion propeller to rotate through the drive motor to provide additional propulsion force for the vehicle. Compared with the background technology, the structure of the present invention has the following beneficial effects: 1. When an amphibious vehicle is traveling on the water, the switching device and the removable spare tire both increase the rearward tilt angle of the amphibious vehicle in the water and reduce water resistance, thereby improving the passability of the amphibious vehicle in the water. 2. When the amphibious vehicle is traveling on land, the servo motor in the switching device lifts the connecting piece to the highest point through the screw rod. If there is a sudden damage to the wheel, the spare tire can be removed and replaced with the required tire. 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 This is a schematic diagram of the structure of the spare tire and the navigation propulsion device of the amphibious vehicle of the present invention when traveling on land;

[0020] Figure 2 It is a schematic diagram of the structure of the spare tire and the navigation propulsion device of the amphibious vehicle of the present invention when traveling in water;

[0021] Figure 3 It is a structural schematic diagram of the switching device of the spare tire and the navigation propulsion device of the amphibious vehicle according to the present invention;

[0022] Figure 4 A schematic structural diagram of the spare tire / sailing propulsion device of the amphibious vehicle spare tire and the sailing propulsion device of the present invention;

[0023] The marks in the accompanying drawings are respectively: 1. vehicle body; 1-1. rear part of vehicle body; 2. switching device; 2-1. servo motor; 2-2. connecting part; 2-3. connecting part; 2-4. screw rod; 2-5. driving motor; 2-6. upper positioning part; 2-7. lower positioning part; 2-8. motor shaft; 3. spare tire / navigation propulsion device; 3-1. tire; 3-2. propulsion propeller; 3-3. wheel hub; 3-4. installation opening. DETAILED DESCRIPTION

[0024] 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:

[0025] As attached Figure 1 -Attached Figure 4As shown, the present invention is an amphibious vehicle spare tire and navigation propulsion device, the switching device 2 includes a servo motor 2-1, a connecting component 2-2, a coupling 2-3, a screw 2-4, and a drive motor 2-5, the servo motor 2-1 is connected to the screw 2-4, the coupling 2-3 is mounted on the screw 2-4, the drive motor 2-5 is arranged at one end of the coupling 2-3, the connecting component 2-2 is connected to the upper positioning part 2-6 and the lower positioning part 2-7, the other end of the coupling 2-3 is clamped with the connecting component 2-2, the screw 2-4 moves through the lower positioning part 2-7, the spare tire / navigation propulsion device 3 includes a wheel hub 3-3, a tire 3-1 and a propulsion propeller 3-2, and the propulsion propeller 3-2 is located at the inner ring of the tire 3-1. The above structure proposes an improved technical solution to the deficiencies in the prior art. When the structure is set, a switching device 2 and a spare tire / sailing propulsion device 3 are respectively set. The switching device 2 is used to switch the vehicle between land and water, and the spare tire / sailing propulsion device 3 is used for the power propulsion of the vehicle traveling on the water. The switching device 2 includes a servo motor 2-1, a connecting component 2-2, a connecting piece 2-3, a screw rod 2-4, and a driving motor 2-5. The servo motor 2-1 is connected to the screw rod 2-4. The servo motor 2-1 can drive the screw rod 2-4 to rotate when controlling the rotation. The connecting piece 2-3 is mounted on the screw rod 2-4. When the screw rod 2-4 rotates, it acts on the connecting piece 2-3 to realize the lifting action of the connecting piece 2-3. The lifting of the connecting piece 2-3 drives the driving motor 2-5 to lift. A driving motor 2-5 is arranged at one end of the coupling 2-3, the connecting part 2-2 connects the upper positioning part 2-6 and the lower positioning part 2-7, the connecting part 2-2 is clamped at the other end of the coupling 2-3, the screw rod 2-4 moves through the lower positioning part 2-7, and the coupling 2-3 limits the coupling 2-3, ensuring that under the drive of the screw rod 2-4, the coupling 2-3 can only be raised and lowered relative to the screw rod 2-4, and will not rotate. The spare tire / navigation propulsion device 3 includes a wheel hub 3-3, a tire 3-1 and a propulsion propeller 3-2, and the propulsion propeller 3-2 is located on the inner ring of the tire 3-1. The wheel hub is used to install the tire 3-1, and the propulsion propeller 3-2 is connected to the driving motor 2-5. When the driving motor 2-1 is controlled to rotate, the driving motor can drive the propulsion propeller 3-2 to rotate. In this way, when the amphibious vehicle needs to travel on land, the control screw 2-4 is rotated in one direction, and the screw 2-4 drives the connecting piece 2-3 to rise to the highest position, so that the spare tire / navigation propulsion device 3 rises to the highest position and does not touch the ground, and does not affect the vehicle's travel on land. The wheel hub 3-3 and the tire 3-1 are connected to form a tire, and the tire is connected to the driving motor 2-5 through the wheel hub 3-3, so that the tire is fixedly connected to the switching device, and can be easily connected and disassembled, and used as a spare tire.When the amphibious vehicle needs to travel on the water surface, the screw rod 2-4 is controlled to rotate in another direction, and the screw rod 2-4 drives the coupling 2-3 to drop to the lowest position, then the spare tire / navigation propulsion device 3 drops below the water surface, and then the drive motor 2-5 is controlled to start, and the drive motor 2-5 drives the propulsion propeller 3-2 to rotate, generating power, and realizing the vehicle's water surface driving. In the structure of the present invention, the vehicle body 1 is connected to the switching device 2, and the switching device 2 drives the coupling 2-3 to move up and down relative to the screw rod through the servo motor, and one end of the coupling 2-3 is connected to the drive motor 2-5 by bolts, and the front end of the drive motor is connected to the tire (detachable spare tire, spare tire) by bolts, and the propulsion propeller 3-2 is located inside the tire and fixedly connected to the end of the drive motor 2-5 shaft. When the amphibious vehicle enters the water and travels, the switching device 2 controls the spare tire to drop to the lowest point through the servo motor 2-1 to ensure that the spare tire is immersed in the water, and drives the propulsion propeller 3-2 to rotate through the drive motor 2-5 to provide additional propulsion to the vehicle. Compared with the background technology, the structure of the present invention has the following beneficial effects: 1. When an amphibious vehicle is traveling on the water, the switching device 2 and the removable spare tire both increase the castor angle of the amphibious vehicle in the water and reduce water resistance, thereby improving the passability of the amphibious vehicle in the water. 2. When the amphibious vehicle is traveling on land, the servo motor 2-1 in the switching device 2 lifts the connecting piece 2-3 to the highest point through the screw rod 2-4. If there is a sudden damage to the wheel, the spare tire can be removed and replaced with the required tire. The amphibious vehicle spare tire and navigation propulsion device described in the present invention have a simple structure and can realize the switching between the spare tire and the navigation propulsion device. When switching to the spare tire, it does not affect the vehicle's operation on land. When switching to the propeller, it increases the castor angle of the vehicle in the water and reduces water resistance, thereby improving the passability of the vehicle in the water.

[0026] The screw rod 2-4 is screwed to connect the screw hole of the connecting member 2-3. In the above structure, the screw rod and the connecting member 2-3 are matched with the screw rod and the screw hole. When the screw rod 2-4 rotates, the connecting member 2-3 is limited by the connecting component 2-2, so that the connecting member 2-3 can only move up and down.

[0027] The wheel hub 3-3 of the spare tire / sailing propulsion device 3 is provided with a mounting opening 3-4, and the rear body 1-1 of the vehicle body 1 is provided with a plurality of mounting screw holes. In the above structure, the opening 3-4 is used for bolts to pass through, and the bolts connect the wheel hub 3-3 with the threaded hole of the spare tire / sailing propulsion device at the front end of the drive motor to achieve a fixed connection of the spare tire, and the motor shaft of the drive motor 2-5 is connected to the propulsion propeller 3-2, and when the drive motor 2-5 rotates, the propulsion propeller 3-2 is driven to rotate, thereby increasing the thrust for traveling on the water surface. The mounting screw holes provided at the rear body 1-1 of the vehicle body 1 are used for bolts to pass through, and are used to connect the connecting component 2-2 and the rear body 1-1.

[0028] The length of the motor shaft 2-8 of the driving motor 2-5 is greater than the sum of the thicknesses of the wheel hub 3-3 and the propulsion propeller 3-2, and the motor shaft 2-8 includes a threaded portion; the motor shaft 2-8 passes through the wheel hub 3-3 to connect to the propulsion propeller 3-2, and the threaded portion is screwed with a nut. In the above structure, the motor shaft 2-8 passes through the wheel hub 3-3 to connect to the propulsion propeller 3-2, and then the nut is screwed, and the propulsion propeller 3-2 is fixedly connected to the motor shaft 2-8. The motor shaft 2-8 movably passes through the center hole on the wheel hub 3-3, and the diameter of the center hole is greater than the diameter of the motor shaft 2-8, and the wheel hub 3-3 does not affect the rotation of the motor shaft 2-8. When the amphibious vehicle travels on the water, the control component controls the action of the device of the present invention, controls the rotation of the driving motor 2-5, and the motor shaft 2-8 drives the propulsion propeller 3-2 to rotate.

[0029] The servo motor 2-1 is fixedly connected to the upper end of the upper positioning part 2-6 by bolts, and the motor shaft of the servo motor 2-1 is fixedly connected to the upper end of the screw rod 2-4. In the above structure, the servo motor 2-1 is a fixed connection structure, and the motor shaft of the servo motor 2-1 is fixedly connected to the upper end of the screw rod 2-4. When the servo motor 2-1 is controlled to rotate, the screw rod 2-4 is driven to achieve synchronous and unidirectional rotation.

[0030] The connecting member 2-2 is fixedly connected to the mounting screw hole by bolts. The above structure can realize the connection between the connecting member 2-2 and the rear part 1-1 of the vehicle body by bolts, realize the reliable connection of the switching device 2 to the vehicle body 1, and will not be easily loosened or swung, which is convenient for the spare tire arrangement.

[0031] The front end of the driving motor 2-5 is provided with a spare tire / sailing propulsion device positioning block and a spare tire / sailing propulsion device mounting screw hole, and the wheel hub 3-3 is provided with a positioning groove. With the above structure, after the wheel hub is installed in place, the positioning groove and the positioning block are clamped to reliably realize the positioning of the wheel hub and the driving motor, ensuring that the wheel hub and the driving motor will not rotate, and the two are fixedly connected by bolts.

[0032] When the servo motor 2-1 drives the screw rod 2-4 to rotate in one direction, the screw rod 2-4 is configured to be able to drive the connecting piece 2-3 to move downward. When the servo motor 2-1 drives the screw rod 2-4 to rotate in another direction, the screw rod 2-4 is configured to be able to drive the connecting piece 2-3 to move upward. The above structure can drive the screw rod 2-4 to rotate in different directions by controlling the motor shaft of the servo motor 2-1 to rotate in different directions through the control component, and then drive the connecting piece 2-3 to achieve lifting and lowering. The lifting and lowering of the connecting piece 2-3 drives the spare tire to achieve lifting and lowering.

[0033] The connecting component 2-2 is fixedly connected to the upper positioning part 2-6 and the lower positioning part 2-7 by bolts, and the connecting component 2-3 is movably clamped to the connecting component 2-2. In the above structure, the connecting component 2-2 is fixedly connected to the switching device on the one hand, and the connecting component 2-2 is connected to the rear part of the vehicle body on the other hand. The connecting component also limits the connecting component 2-3 to ensure that the connecting component 2-3 can only move up and down.

[0034] The amphibious vehicle spare tire and navigation propulsion device of the present invention are respectively provided with a switching device 2 and a spare tire / navigation propulsion device 3, wherein the switching device 2 is used for switching the vehicle between land and water, and the spare tire / navigation propulsion device 3 is used for power propulsion of the vehicle traveling on the water. The switching device 2 comprises a servo motor 2-1, a connecting component 2-2, a coupling 2-3, a screw rod 2-4, and a driving motor 2-5, wherein the servo motor 2-1 is connected to the screw rod 2-4, and the servo motor 2-1 can drive the screw rod 2-4 to rotate when controlling the rotation, and the coupling 2-3 is mounted on the screw rod 2-4, and when the screw rod 2-4 rotates, it acts on the coupling 2-3 to realize the lifting action of the coupling 2-3, and the lifting of the coupling 2-3 drives the driving motor 2-5 to lift. A driving motor 2-5 is arranged at one end of the coupling 2-3, the connecting part 2-2 connects the upper positioning part 2-6 and the lower positioning part 2-7, the connecting part 2-2 is clamped at the other end of the coupling 2-3, the screw rod 2-4 moves through the lower positioning part 2-7, and the coupling 2-3 limits the coupling 2-3, ensuring that under the drive of the screw rod 2-4, the coupling 2-3 can only be raised and lowered relative to the screw rod 2-4, and will not rotate. The spare tire / navigation propulsion device 3 includes a wheel hub 3-3, a tire 3-1 and a propulsion propeller 3-2, and the propulsion propeller 3-2 is located on the inner ring of the tire 3-1. The wheel hub is used to install the tire 3-1, and the propulsion propeller 3-2 is connected to the driving motor 2-5. When the driving motor 2-1 is controlled to rotate, the driving motor can drive the propulsion propeller 3-2 to rotate. In this way, when the amphibious vehicle needs to travel on land, the control screw 2-4 is rotated in one direction, and the screw 2-4 drives the coupling 2-3 to rise to the highest position, then the spare tire / navigation propulsion device 3 rises to the highest position, does not touch the ground, and does not affect the vehicle's land travel. The wheel hub 3-3 and the tire 3-1 are connected to form a tire, and the tire is connected to the drive motor 2-5 through the wheel hub 3-3, so that the tire and the switching device are fixedly connected, and it can be easily connected and disassembled to be used as a spare tire. When the amphibious vehicle needs to travel on the water, the control screw 2-4 is rotated in another direction, and the screw 2-4 drives the coupling 2-3 to drop to the lowest position, then the spare tire / navigation propulsion device 3 drops below the water surface, and then the control drive motor 2-5 is started, and the drive motor 2-5 drives the propulsion propeller 3-2 to rotate, generating power, and realizing the vehicle's water surface travel propulsion. In the structure of the present invention, the vehicle body 1 is connected to the switching device 2, the switching device 2 drives the coupling 2-3 to move up and down relative to the screw rod through the servo motor, one end of the coupling 2-3 is connected to the driving motor 2-5 through bolts, the front end of the driving motor is connected to the tire (detachable spare tire, spare tire) through bolts, and the propulsion propeller 3-2 is located inside the tire and fixedly connected to the end of the shaft of the driving motor 2-5. When the amphibious vehicle enters the water, the switching device 2 controls the spare tire to the lowest point through the servo motor 2-1 to ensure that the spare tire is immersed in the water, and drives the propulsion propeller 3-2 to rotate through the driving motor 2-5 to provide additional propulsion to the vehicle.Compared with the background technology, the structure of the present invention has the following beneficial effects: 1. When the amphibious vehicle is traveling on the water, the switching device 2 and the removable spare tire both increase the rearward tilt angle of the amphibious vehicle in the water and reduce the water resistance, thereby improving the passability of the amphibious vehicle in the water. 2. When the amphibious vehicle is traveling on land, the servo motor 2-1 in the switching device 2 raises the connecting piece 2-3 to the highest point through the screw rod 2-4. If there is a sudden damage to the wheel, the spare tire can be removed and replaced with the required tire.

[0035] 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 spare tire and navigation propulsion device, characterized in that: The switching device (2) comprises a servo motor (2-1), a connecting component (2-2), a coupling component (2-3), a screw rod (2-4), and a drive motor (2-5); the servo motor (2-1) is connected to the screw rod (2-4); the coupling component (2-3) is mounted on the screw rod (2-4); the drive motor (2-5) is arranged at one end of the coupling component (2-3); the connecting component (2-2) is connected to an upper positioning part (2-6) and a lower positioning part (2-7); the connecting component (2-2) is clamped at the other end of the coupling component (2-3); the screw rod (2-4) movably passes through the lower positioning part (2-7); and the spare tire / navigation propulsion device (3) comprises a wheel hub (3-3), a tire (3-1), and a propulsion propeller (3-2); the propulsion propeller (3-2) is located at the inner ring of the tire (3-1).

2. The amphibious vehicle spare tire and navigation propulsion device according to claim 1, characterized in that: The screw rod (2-4) is screwed into the screw hole portion of the connecting member (2-3).

3. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: A mounting opening (3-4) is arranged on the wheel hub (3-3) of the spare tire / navigation propulsion device (3), and a plurality of mounting screw holes are arranged on the rear part (1-1) of the vehicle body (1).

4. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: The length of the motor shaft (2-8) of the driving motor (2-5) is greater than the sum of the thicknesses of the wheel hub (3-3) and the propulsion propeller (3-2), and the motor shaft (2-8) comprises a threaded portion; the motor shaft (2-8) passes through the wheel hub (3-3) and is connected to the propulsion propeller (3-2), and the threaded portion is screwed with a nut.

5. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: The servo motor (2-1) is fixedly connected to the upper end of the upper positioning portion (2-6) via bolts, and the motor shaft of the servo motor (2-1) is fixedly connected to the upper end of the screw rod (2-4).

6. The amphibious vehicle spare tire and navigation propulsion device according to claim 3, characterized in that: The connecting component (2-2) is fixedly connected to the mounting screw hole by means of bolts.

7. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: A spare tire / sailing propulsion device positioning block (2-8) and a spare tire / sailing propulsion device mounting screw hole are arranged at the front end of the driving motor (2-5), and a positioning groove is arranged on the wheel hub (3-3).

8. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: When the servo motor (2-1) drives the screw rod (2-4) to rotate in one direction, the screw rod (2-4) is configured to be a structure capable of driving the connecting member (2-3) to move downward.

9. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: When the servo motor (2-1) drives the screw rod (2-4) to rotate in another direction, the screw rod (2-4) is configured as a structure capable of driving the connecting member (2-3) to move upward.

10. The amphibious vehicle spare tire and navigation propulsion device according to claim 1 or 2, characterized in that: The connecting component (2-2) is fixedly connected to the upper positioning part (2-6) and the lower positioning part (2-7) by means of bolts, and the connecting piece (2-3) is movably clamped to the connecting component (2-2).

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