Underwater running driving device and amphibious vehicle

Abstract

The utility model discloses an underwater driving device and an amphibious vehicle. The underwater driving device comprises a standby wheel assembly and a first position switching mechanism. The spare wheel assembly comprises spare wheels; the first position switching mechanism enables the standby wheel to be switched between the first switching position and the second switching position, and when the amphibious vehicle runs on the land, the standby wheel is located at the first switching position. And due to the arrangement of the first position switching mechanism, additional arrangement of an underwater propelling device is avoided, and the production cost of the vehicle is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of amphibious vehicles, in particular to an underwater driving device and an amphibious vehicle. Background Art

[0002] Amphibious vehicles have always been an important research direction in vehicle development.

[0003] In the related art, an amphibious vehicle will directly add a water propeller to enable the amphibious vehicle to have the ability to travel on water when floating on water. However, the water propeller will affect the travel of the amphibious vehicle on land. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an underwater driving device and an amphibious vehicle, so that the water propeller does not affect the driving of the amphibious vehicle on land.

[0005] According to the first aspect of the present invention, the underwater driving device comprises: a spare wheel assembly, a first position switching mechanism,

[0006] The spare wheel assembly includes a spare wheel;

[0007] The first position switching mechanism enables the spare wheel to switch between a first switching position and a second switching position. When the amphibious vehicle is traveling on land, the spare wheel is in the first switching position; when the amphibious vehicle is traveling in water, the spare wheel is in the second switching position, so that the spare wheel can provide thrust by paddling when rotating.

[0008] In this embodiment, the spare wheel is switched between the first switching position and the second switching position through the first position switching mechanism, thereby avoiding the need to provide an additional underwater propulsion device, reducing the production cost of the vehicle, and preventing the underwater propulsion device from affecting the normal driving of the vehicle on land.

[0009] According to some embodiments of the utility model, a second position switching mechanism is further included, and the second position switching mechanism adjusts the depth or posture of the spare wheel in the water. The second position switching mechanism adjusts the depth or posture of the spare wheel in the water, and can select a suitable depth or posture according to actual conditions, and can change the magnitude of the thrust of the rotating spare wheel in the water, and can avoid the spare wheel from contacting the bottom of the water, thereby avoiding the wear of the spare wheel, so that the spare wheel can better drive the vehicle to travel in the water.

[0010] According to some embodiments of the present invention, the first position switching mechanism includes a first linear drive mechanism, and the second position switching mechanism includes a second linear drive mechanism.

[0011] The output end of the second linear drive mechanism is connected to the spare wheel to adjust the depth of the spare wheel in the water, and the output end of the first linear drive mechanism is connected to the second linear drive mechanism to switch the spare wheel between the first switching position and the second switching position.

[0012] According to some embodiments of the present invention, the first position switching mechanism further includes a first locking member, and the first locking member is used to lock or unlock the output end of the first linear drive mechanism.

[0013] The second position switching mechanism further includes a second locking member, and the second locking member is used to lock or unlock the output end of the second linear drive mechanism.

[0014] According to some embodiments of the utility model, the first position switching mechanism includes a first screw mechanism, which includes a first screw, a first slider screwed to the first screw, and a first guide member, the first guide member is provided with a first anti-rotation portion, the first slider is provided with a first anti-rotation matching portion, and the first anti-rotation matching portion is anti-rotationally matched with the first anti-rotation portion.

[0015] According to some embodiments of the present invention, one of the first anti-rotation portion and the first anti-rotation matching portion is a long protrusion, the extension direction of the long protrusion is the same as the extension direction of the first screw, and the other is a groove, the groove is inserted and matched with the long protrusion, or,

[0016] One of the first anti-rotation portion and the first anti-rotation matching portion is a long groove, the extension direction of the long groove is the same as the extension direction of the first screw, and the other is a protrusion, which is inserted and matched with the long groove.

[0017] According to some embodiments of the present invention, the first position switching mechanism includes a hydraulic push rod or an electric push rod.

[0018] According to some embodiments of the present invention, the spare wheel comprises spokes, and the spokes are used for paddling water to provide thrust when the spare wheel rotates.

[0019] According to some embodiments of the present utility model, the spare wheel includes a rim and a blade-type spoke radially arranged at one end of the rim.

[0020] According to some embodiments of the present invention, the spare wheel assembly further includes a drive motor, and the drive motor drives the blade-type spokes to rotate.

[0021] The amphibious vehicle according to the embodiment of the second aspect of the utility model comprises the underwater driving device of the first aspect.

[0022] According to some embodiments of the present utility model, the underwater driving device includes a spare wheel assembly, and the spare wheel assembly is installed on the rear side of the amphibious vehicle.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] Figure 1 is a schematic diagram of a spare wheel of an underwater driving device according to an embodiment of the utility model being in a first switching position;

[0026] Figure 2 is a schematic diagram of a spare wheel of an underwater driving device according to an embodiment of the utility model being in a second switching position;

[0027] Figure 3 is a schematic diagram of an underwater driving device according to an embodiment of the utility model;

[0028] Figure 4 Schematic diagram of the first and second position switching mechanism according to an embodiment of the utility model

[0029] Figure 5 yes Figure 4 Explosion hint Figure 1 ;

[0030] Figure 6 yes Figure 4 Explosion hint Figure 2 ;

[0031] Figure 7 is a schematic diagram of the first and second screw mechanisms according to an embodiment of the utility model;

[0032] Figure 8 The spare wheel according to the embodiment of the utility model is schematically shown in FIG. Figure 1 ;

[0033] Fig. 9 The spare wheel according to the embodiment of the utility model is schematically shown in FIG. Figure 2 ;

[0034] Fig.10is a schematic diagram of the posture adjustment of the spare wheel according to an embodiment of the utility model;

[0035] Reference numerals:

[0036] A first position switching mechanism 10, a first screw mechanism 11, a first screw 111, a first slider 112, a first anti-rotation fitting portion 1121, a first guide member 113, a first anti-rotation portion 1131, and a first motor 12;

[0037] A second position switching mechanism 20, a second screw mechanism 21, a second screw 221, a second slider 222, a second guide member 223, and a second motor 22;

[0038] A spare wheel assembly 30, a spare wheel 31, a rim 311, a blade-type spoke 312, a drive motor 32, and a connecting frame 33;

[0039] Support frame 40 and cover 50. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0041] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0042] like Figure 1-Figure 10 As shown, the underwater driving device according to the embodiment of the first aspect of the utility model includes: a spare wheel assembly 30 and a first position switching mechanism 10.

[0043] The spare wheel assembly 30 includes a spare wheel 31. The first position switching mechanism 10 enables the spare wheel 31 to switch between a first switching position and a second switching position. When the amphibious vehicle is traveling on land, the spare wheel 31 is in the first switching position; when the amphibious vehicle is traveling in water, the spare wheel 31 is in the second switching position, so that the spare wheel 31 provides thrust by paddling when rotating.

[0044] It should be noted that the underwater driving device can be installed on the rear side of an amphibious vehicle. For example, the underwater driving device can be installed on the trunk lid of an amphibious vehicle, the underwater driving device can be installed on the rear side of the chassis of an amphibious vehicle, etc. These embodiments are not listed one by one.

[0045] The first position switching mechanism 10 has a first switching position and a second switching position. When the amphibious vehicle is traveling on land, Figure 1 As shown, the spare wheel 31 is in the first switching position. In the current position, the spare wheel 31 will not affect the normal driving of the vehicle on land; when the amphibious vehicle is driving in water, such as Figure 2 As shown, the spare wheel 31 switches from the first switching position to the second switching position, and the spare wheel 31 rotating at the current moment provides thrust by paddling, so that the vehicle can travel in the water. In this way, the spare wheel 31 can be used as a spare wheel 31 for the vehicle when traveling on land. For example, if one of the two front wheels is leaking, the spare wheel 31 can be replaced, or if one of the two rear wheels is leaking, the spare wheel 31 can be replaced; on the other hand, the spare wheel 31 can be used as a driving device for the vehicle to travel in the water. In other words, the water propulsion device in the related art is integrated with the spare wheel 31 to avoid the additional setting of the water propulsion device, reduce the production cost of the vehicle, and avoid the water propulsion device affecting the normal travel of the vehicle on land.

[0046] Furthermore, the second position switching mechanism 20 adjusts the depth at which the spare wheel 31 is located in the water or the posture at which the spare wheel 31 is located in the water.

[0047] The second position switching mechanism 20 can adjust the depth of the spare wheel 31 in the water. For example, the spare wheel 31 is adjusted to a first preset depth, and the distance between the first preset depth and the bottom of the water is d1, so that the spare wheel 31 can be prevented from contacting the bottom of the water, thereby preventing the spare wheel 31 from being worn; or, the spare wheel 31 is adjusted to a second preset depth, so that the magnitude of the thrust of the rotating spare wheel 31 in the water can be changed.

[0048] Of course, it is understandable that Fig.10 As shown, the second position switching mechanism 20 can adjust the posture of the spare wheel 31 in the water. For example, the angle between the axis of the spare wheel 31 and the water surface is adjusted to α, so that the thrust of the rotating spare wheel 31 can be changed, or the spare wheel 31 can be prevented from contacting the bottom of the water, thereby avoiding the wear of the spare wheel 31.

[0049] To summarize, in this embodiment, the first position switching mechanism 10 enables the spare wheel 31 to switch between the first switching position and the second switching position, thereby avoiding the additional provision of an underwater propulsion device, reducing the production cost of the vehicle, and also avoiding the water propulsion device from affecting the normal driving of the vehicle on land; the second position switching mechanism 20 adjusts the depth or posture of the spare wheel 31 in the water, and can select a suitable depth or posture according to actual conditions, and can change the size of the paddling thrust of the rotating spare wheel 31, and can avoid the spare wheel 31 from contacting the bottom of the water, thereby avoiding wear of the spare wheel 31, so that the spare wheel 31 can better drive the vehicle to travel in the water.

[0050] In some embodiments of the utility model, the first position switching mechanism 10 includes a first linear drive mechanism, the second position switching mechanism 20 includes a second linear drive mechanism, the output end of the second linear drive mechanism is connected to the spare wheel 31, and the depth of the spare wheel 31 in the water is adjusted. The output end of the first linear drive mechanism is connected to the second linear drive mechanism so that the spare wheel 31 switches between the first switching position and the second switching position.

[0051] It should be noted that the first linear drive mechanism can make the motion trajectory of the spare wheel 31 a straight line, shorten the trajectory between the first switching position and the second switching position, and improve the switching efficiency. The first linear drive mechanism can be a gear rack mechanism, a crank connecting rod mechanism, or a screw drive mechanism, which converts the rotational motion into a linear motion through the cooperation of the helical line and the screw, for example, a screw mechanism; ..., which are not listed one by one in this embodiment.

[0052] Similarly, the second linear drive mechanism may be the same as the first linear drive mechanism, and thus will not be described in detail.

[0053] Of course, it is understandable that the first position switching mechanism 10 can also be other mechanisms, for example, one end of the swing arm is hinged and the other end is connected to the spare wheel 31, so that the spare wheel 31 can switch between the first switching position and the second switching position. Similarly, the second position switching mechanism 20 can also be other mechanisms.

[0054] Furthermore, the first position switching mechanism 10 further includes a first locking member, and the first locking member is used to lock or unlock the output end of the first linear drive mechanism.

[0055] It can be understood that: when the spare wheel 31 is in the first switching position or the second switching position, the first locking piece cooperates with the output end of the first linear drive mechanism so that the spare wheel 31 can be stably in the first switching position or the second switching position; when the spare wheel 31 is ready to switch between the first switching position and the second switching position, the first locking piece disengages or releases the cooperation with the output end of the first linear drive mechanism so that the spare wheel 31 can freely move in the first switching position and switch between the second switching position.

[0056] The second position switching mechanism 20 further includes a second locking member, which is used to lock or unlock the output end of the second linear drive mechanism.

[0057] It is understandable that a suitable depth or posture can be selected according to actual conditions, and when the spare wheel 31 is at a preset depth or a preset posture, the second locking member cooperates with the output end of the second linear drive mechanism to keep the spare wheel 31 in a stable position without changing the depth or posture. When the depth or posture of the spare wheel 31 needs to be adjusted again, the second locking member is disengaged or released from the output end of the second linear drive mechanism.

[0058] Alternatively, if Figure 4-Figure 7 As shown, the first position switching mechanism 10 and the second position switching mechanism 20 are the same. Figure 7 As shown, the first position switching mechanism 10 includes a first screw mechanism 11 and a first motor 12. The first screw mechanism 11 includes a first screw 111, a first slider 112 screwed to the first screw 111, and a first guide member 113. The first guide member 113 is provided with a first anti-rotation portion 1131. The first slider 112 is provided with a first anti-rotation matching portion 1121. The first anti-rotation matching portion 1121 is anti-rotationally matched with the first anti-rotation portion 1131. The output shaft of the first motor 12 transmits power to the first screw 111 through a first belt mechanism. The first screw mechanism 11 is connected to a support frame 40, and the support frame 40 is connected to a vehicle, as shown in FIG. Figure 3 , Figure 4 shown.

[0059] like Figure 7 As shown, the second position switching mechanism 20 includes a second screw mechanism 21 and a second motor 22. The second screw mechanism 21 includes a second screw 221, a second slider 222 screwed to the second screw 221, and a second guide 223. The second guide 223 is provided with a second anti-rotation portion (not marked), and the second slider 222 is provided with a second anti-rotation matching portion (not marked). The second anti-rotation matching portion is anti-rotationally matched with the second anti-rotation portion. The output shaft of the second motor 22 and the second screw 221 transmit power through a second belt mechanism. The cover 50 covers the first and second belt mechanisms mentioned above.

[0060] like Figure 5-Figure 7 As shown, the first position switching mechanism 10 and the second position switching mechanism 20 are arranged along the C2 direction. The first slider 112 is connected to the second screw mechanism 21, and the second slider 222 is connected to the spare wheel assembly 30. The first slider 112 moves along the vertical direction C1 to make the spare wheel 31 of the spare wheel assembly 30 switch back and forth between the first switching position and the second switching position; the second slider 222 moves along the vertical direction C1 to adjust the depth of the spare wheel 31 in the water.

[0061] Among them, the first screw mechanism 11 and the second screw mechanism 21 have the advantages of high transmission efficiency, smooth and accurate movement, which helps the spare wheel 31 to accurately reach the first switching position or the second switching position. At the same time, the small size helps to integrate the spare wheel 31. In addition, it also has self-locking properties, that is, the first screw mechanism 11 itself has a first locking member, and the second screw mechanism 21 itself has a second locking member. The first screw mechanism 11 and the second screw mechanism 21 are arranged along the C2 direction, while increasing the movement stroke of the spare wheel 31, the length of each screw mechanism is shortened, so that the first screw mechanism 11, the second screw mechanism 12 and the spare wheel assembly 30 are designed as a whole.

[0062] Among them, Figure 7 As shown, the first anti-rotation portion 1131 is a long groove, and the extension direction of the long groove is the same as the extension direction of the first lead screw 111. The first anti-rotation matching portion 1121 is a protrusion, and the protrusion is inserted and matched with the long groove. Through the insertion and matching of the protrusion and the long groove, the first slider 112 is prevented from rotating relative to the first lead screw 111 when sliding on the first lead screw 111, and then the first slider 112 only slides back and forth along the first lead screw 111.

[0063] Of course, it can be understood that one of the first anti-rotation portion 1131 and the first anti-rotation matching portion 1121 is a long protrusion, the extension direction of the long protrusion is the same as the extension direction of the first screw 111, and the other is a groove, which is inserted and matched with the long protrusion.

[0064] Similarly, the second anti-rotation portion and the second anti-rotation matching portion refer to the above description, so they are not repeated here.

[0065] It should be noted that the first screw mechanism 11 may also be a planetary roller screw or a ball screw; the second screw mechanism 21 may also be a planetary roller screw or a ball screw.

[0066] Optionally, the first position switching mechanism 10 may be a hydraulic push rod or an electric push rod.

[0067] Optionally, the second position switching mechanism 20 may be a hydraulic push rod or an electric push rod.

[0068] It should be noted that electric and hydraulic push rods have the advantages of small size, large thrust and good self-locking performance; in addition, hydraulic push rods can work normally in high and low temperature environments and are dustproof and waterproof, and can adapt to various harsh environments.

[0069] In some embodiments of the present invention, Figure 8 , Fig. 9 As shown, the spare wheel assembly 30 further includes a connecting frame 33 and a driving motor 32. The second slider 222 is connected to the connecting frame 33 of the spare wheel assembly 30, and the spare wheel 31 includes a rim 311 and a blade-type spoke 312 radially arranged at one end of the rim 311. The driving motor 32 drives the blade-type spoke 312 to rotate, and the rotating blade-type spoke 312 paddles water to provide thrust.

[0070] It should be noted that when the vehicle is traveling in the water, as the spare wheel 31 rotates, the blade-type spokes 312 arranged on the rim 311 rotate under the drive of the drive motor 32, and the blade-type spokes 312 exert a force on the water, and the reaction force of the water also acts on the blade-type spokes 312. Relying on the reaction force exerted on the blade-type spokes 312, the spare wheel 31 drives the vehicle to move in the water, and then the spare wheel 31 can be rotated forward and backward to realize the forward and reverse movement of the vehicle in the water.

[0071] The amphibious vehicle according to the embodiment of the second aspect of the utility model comprises the underwater driving device of the first aspect.

[0072] The spare wheel assembly 30 of the underwater driving device is installed on the rear side of the amphibious vehicle. For example, the underwater driving device can be installed on the trunk cover of the amphibious vehicle, the underwater driving device can be installed on the rear side of the chassis of the amphibious vehicle, etc. This embodiment is not listed one by one.

[0073] The amphibious vehicle has the advantages of an underwater driving device. The spare wheel 31 is switched between the first switching position and the second switching position through the first position switching mechanism 10, avoiding the need for an additional underwater propulsion device, reducing the production cost of the vehicle, and avoiding the water propulsion device from affecting the normal driving of the vehicle on land; the second position switching mechanism 20 adjusts the depth or posture of the spare wheel 31 in the water, and can select a suitable depth or posture according to actual conditions, and can change the size of the paddling thrust of the rotating spare wheel 31, and can avoid the spare wheel 31 from contacting the bottom of the water, thereby avoiding wear of the spare wheel 31, so that the spare wheel 31 can better drive the vehicle to travel in the water.

[0074] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0075] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0076] In the description of the present invention, "plurality" means two or more.

[0077] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0078] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", "some examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A driving device for underwater travel, characterized in that: include: A spare wheel assembly (30), the spare wheel assembly (30) comprising a spare wheel (31); A first position switching mechanism (10), wherein the first position switching mechanism (10) enables the spare wheel (31) to switch between a first switching position and a second switching position; when the amphibious vehicle is traveling on land, the spare wheel (31) is in the first switching position; when the amphibious vehicle is traveling in water, the spare wheel (31) is in the second switching position, so that the spare wheel (31) provides thrust by paddling when rotating.

2. The underwater driving device according to claim 1, characterized in that: It also includes a second position switching mechanism (20), wherein the second position switching mechanism (20) adjusts the depth of the spare wheel (31) in the water or the posture of the spare wheel (31) in the water.

3. The underwater driving device according to claim 2, characterized in that: The first position switching mechanism (10) comprises a first linear drive mechanism, and the second position switching mechanism (20) comprises a second linear drive mechanism. The output end of the second linear drive mechanism is connected to the spare wheel (31) to adjust the depth of the spare wheel (31) in the water, and the output end of the first linear drive mechanism is connected to the second linear drive mechanism to switch the spare wheel (31) between the first switching position and the second switching position.

4. The underwater driving device according to claim 3, characterized in that: The first position switching mechanism (10) further comprises a first locking member, the first locking member being used to lock or unlock the output end of the first linear drive mechanism. The second position switching mechanism (20) further comprises a second locking member, wherein the second locking member is used to lock or unlock the output end of the second linear drive mechanism.

5. The underwater driving device according to claim 4, characterized in that: The first position switching mechanism (10) comprises a first screw mechanism (11), the first screw mechanism (11) comprises a first screw (111), a first slider (112) screwed to the first screw (111), and a first guide member (113), the first guide member (113) is provided with a first anti-rotation portion (1131), the first slider (112) is provided with a first anti-rotation matching portion (1121), and the first anti-rotation matching portion (1121) is anti-rotation matched with the first anti-rotation portion (1131).

6. The underwater driving device according to claim 5, characterized in that: One of the first anti-rotation portion (1131) and the first anti-rotation matching portion (1121) is a long protrusion, the extension direction of the long protrusion is the same as the extension direction of the first screw (111), and the other is a groove, the groove is inserted and matched with the long protrusion, or, One of the first anti-rotation portion (1131) and the first anti-rotation fitting portion (1121) is a long groove, the extension direction of the long groove is the same as the extension direction of the first screw (111), and the other is a protrusion, which is inserted and fitted into the long groove.

7. The underwater driving device according to claim 4, characterized in that: The first position switching mechanism (10) comprises a hydraulic push rod or an electric push rod.

8. The underwater driving device according to any one of claims 1 to 7, characterized in that: The spare wheel (31) comprises spokes, and the spokes are used to paddle water to provide thrust when the spare wheel (31) rotates.

9. The underwater driving device according to claim 8, characterized in that: The spare wheel (31) comprises a wheel rim (311) and a blade-type wheel spoke (312) radially arranged at one end of the wheel rim (311).

10. The underwater driving device according to claim 9, characterized in that: The spare wheel assembly (30) further includes a drive motor (32), and the drive motor (32) drives the blade-type spokes (312) to rotate.

11. An amphibious vehicle, characterized in that: The invention comprises the underwater driving device according to any one of claims 1 to 10.

12. The amphibious vehicle according to claim 11, characterized in that: The underwater driving device comprises a spare wheel assembly (30), and the spare wheel assembly (30) is installed on the rear side of the amphibious vehicle.

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