Amphibious bicycle

Abstract

Amphibious bicycle (100) comprising a frame (1), wheels (3, 4), and front floats (5) suitable for floating the bicycle when the bicycle is placed on water; the amphibious bicycle (100) has a front connection and support assembly (6) that supports and movably connects each front float (5) to a steering assembly (2) of the amphibious bicycle (100), in such a way that each front float (5) can be alternately disposed in a retracted position, wherein the front float (5) is positioned close to and alongside the front wheel (3), and an extended position, wherein the front float (5) is in distal position with respect to the front wheel (3).

Description

[0001] AMPHIBIOUS BICYCLE

[0002] DESCRIPTION

[0003] The present patent application for industrial invention relates to an amphibious bicycle.

[0004] The field of reference of the present patent application is that of cycling.

[0005] As it is known, cycling is one of the most complete and beneficial sports for the body, as it has a positive effect on almost all aspects of health.

[0006] A conventional bicycle is provided with a frame, a saddle whereon the user sits, a steering handlebar held by the user, a front wheel connected to the steering handlebar, a rear wheel, pedals whereon the user's feet rest, and transmission means to transmit the motion of the pedals to the rear wheel.

[0007] As it is known, due to the provision of wheels, such a conventional bicycle can only be used and travel on solid ground, it being therefore impossible to use it in water.

[0008] However, “amphibious bicycles” suitable for being used both on road and water have been recently designed.

[0009] Said water bicycles are conventional bicycles that are equipped with floats to float on water and with water propulsion means to move forward on water.

[0010] By way of example, the propulsion means may consist of paddles connected to the rear wheel that operate on the water when the user pedals, or they may consist of turbines that are specially powered by a battery mounted on the bike.

[0011] Ultimately, amphibious bicycles are designed to offer a new dimension of freedom and adventure to users by combining the worlds of cycling and water sports.

[0012] An amphibious bicycle is the perfect vehicle for those who love nature and want to discover new places in an original fun way. In addition, such a type of bicycle is also an innovative solution for those who live in coastal or marshy areas and need a means of transportation to move around on soggy ground.

[0013] However, the amphibious bicycles that are currently available on the market are impaired by a problem that particularly concern the floats.

[0014] In fact, the floats protrude from the sides of the bicycle and are attached to the frame by means of complex and cumbersome mounting frames. In this regard, when it is used on the road, the bicycle is cumbersome and dangerous, and it is therefore necessary to attach and detach the frames each time, depending on whether the user intends to use the bicycle on land or on water.

[0015] Attaching and detaching the floats to / from the bicycle is a rather inconvenient practice that makes the amphibious bicycle impractical and unattractive to users.

[0016] The purpose of this invention is to overcome the drawbacks of the prior art by designing a new amphibious bicycle that, while keeping the floats attached to the bicycle, is not cumbersome when the bicycle is traveling on a road or ground.

[0017] A further purpose of the present invention is to devise a new amphibious bicycle that can be simply and quickly set by the user in land or water operation mode.

[0018] Another purpose of the present invention is to design an amphibious bicycle that is efficient, functional, robust, and inexpensive to manufacture.

[0019] These purposes are achieved in accordance with the invention with the characteristics listed in the attached independent claim 1 .

[0020] Advantageous embodiments appear from the dependent claims.

[0021] The amphibious bicycle according to the invention is defined by claim 1 .

[0022] For greater clarity, the description of the amphibious bicycle according to the invention continues with reference to the attached drawings, which are for illustrative purposes only and not limiting, wherein:

[0023] Fig. 1 is an axonometric view of the amphibious bicycle according to the invention;

[0024] Fig. 1 A is an enlarged view of the detail enclosed in circle A of Fig. 1 ;

[0025] Fig. 2 is a side view of the amphibious bicycle according to the invention with the floats in closed position;

[0026] Fig. 2A is a cross-sectional view of the amphibious bicycle of Fig. 2 taken along the plane ll-ll;

[0027] Fig. 2B is an enlarged view of a detail of Fig. 2A;

[0028] Fig. 3 is a side view of the amphibious bicycle according to the invention with the floats arranged in an intermediate position;

[0029] Fig. 3A is a cross-sectional view of the amphibious bicycle of Fig. 3 taken along the plane Ill-Ill;

[0030] Fig. 3B is an enlarged view of a detail of Fig. 3A; Fig. 4 is a side view of the amphibious bicycle according to the invention with the floats arranged in open position;

[0031] Fig. 4A is a cross-sectional view of the amphibious bicycle of Fig. 4 taken along the plane IV-IV;

[0032] Fig. 4B is an enlarged view of a detail of Fig. 4A;

[0033] Fig. 5 is an axonometric view of a float of the amphibious bicycle;

[0034] Fig. 5A is a sectional view of the float of Fig. 5 taken along the plane V-V of Fig. 5.

[0035] With reference to the attached figures, an amphibious bicycle generally indicated with reference numeral (100) is described.

[0036] With reference to Figs. 1 , 2, 3, and 4, the amphibious bicycle (100) comprises a frame (1 ) having a front part (1 1 ) and a rear part (12).

[0037] A steering assembly (2) is rotatably connected to the front part (11 ) of the frame (1 ) and comprises a handlebar (21 ), a fork (22), and a steering tube (23) connecting the handlebar (21 ) and the fork (22) to each other.

[0038] The amphibious bicycle (100) comprises a front wheel (3) and a rear wheel (4).

[0039] The front wheel (3) has a hub (30) rotatably connected to the fork (22) about an axis of rotation (X3), an outer rim (31 ) connected to the hub (30) by means of connection means, and a tire (32) arranged around the outer rim (31 ). The connection means that connect the outer rim (31 ) to the hub (30) consist of conventional spokes.

[0040] The rear wheel (4) has a hub (40) rotatably connected to the rear part (12) of the frame (1 ) around an axis of rotation (X4), an outer rim (41 ) connected to the hub (40) by means of connection means, and a tire (42) arranged around the outer rim (41 ).

[0041] Furthermore, the amphibious bicycle (100) comprises a saddle (S) connected to the frame (1 ) whereon a user's buttocks are suitable for resting and two pedals (P) rotatably connected to the frame (1 ) by means of respective pedal cranks (Px).

[0042] A transmission assembly (G) connects the pedals (P) to the rear wheel (4) to transmit the motion of the pedals (P) to the rear wheel (4).

[0043] The transmission assembly (G) is not shown in detail in the attached figures, it being known to a person skilled in the art. By way of example, the transmission assembly (G) may comprise a crown-pinion-chain system comprising a crown integral with the pedals (P), at least one pinion integral with the rear wheel (4), and a chain that surrounds the crown and the at least one pinion in such a way that the muscular driving force applied to the pedals by the user is transmitted to the rear wheel (4). The transmission assembly (G) may further comprise a plurality of pinions of different diameter integral with the rear wheel (4), and a gear system that allows the chain to be derailed onto one of said pinions to vary the transmission ratio between the pedals and the rear wheel (4).

[0044] Moreover, the amphibious bicycle (100) comprises two front floats (5) disposed in opposite position on either side of the front wheel (3) and suitable for making the amphibious bicycle (100) float when the amphibious bicycle (100) is placed on water, and two rear floats (8) disposed in opposite position on either side of the rear wheel (4) and suitable for assisting the front floats (5) in floating the amphibious bicycle (100) when the amphibious bicycle (100) is placed on water.

[0045] The amphibious bicycle (100) further comprises water propulsion means (7) configured to operate on water in order to set the amphibious bicycle (100) in motion when the amphibious bicycle (100) is placed on water.

[0046] The water propulsion means (7) comprise a plurality of paddles (70) that extend radially from the hub (40) of the rear wheel (4) to the outer rim (41 ) of the rear wheel (4). The paddles (70) of the water propulsion means (7) coincide with the connection means that connect the outer rim (41 ) and the hub (40) of the rear wheel (4) to each other.

[0047] The paddles (70) have a concavity facing in the same direction of rotation in which the rear wheel (4) rotates when the amphibious bicycle (100) moves forward.

[0048] With reference to Figs. 1 , 1 A, 2A, 2B, 3A, 3B, 4A, and 4B, the amphibious bicycle (100) comprises a front connection and support assembly (6) that supports and movably connects each front float (5) to the steering assembly (2) in such a way that each front float (5) can be alternately disposed in a retracted position (shown in Figg. 2, 2A, 2B), wherein the front float (5) is positioned close to and alongside the front wheel (3), and in an extracted position (shown in Figg. 4, 4A, and 4B), wherein the front float (5) is in distal position with respect to the front wheel (3).

[0049] Moreover, the amphibious bicycle (100) comprises a rear connection and support assembly (9) that supports and movably connects each rear float (8) to the rear part (12) of the frame (1 ) in such a way that each rear float (8) can be alternately disposed in a retracted position (shown in Figg. 2, 2A, 2B), wherein the rear float (8) is positioned close to and alongside the rear wheel (4), and in an extended position (shown in Figg. 4, 4A, 4B), wherein the rear float (8) is in distal position with respect to the rear wheel (4).

[0050] With particular reference to Figs. 5 and 5A, each float (5, 8) has the shape of a solid having a first face (51 , 81 ) and a second face (52, 82) opposite each other and a perimeter edge (53, 83). When the float (5, 8) is in retracted position, said first face (51 , 81 ) and said second face (52, 82) are substantially orthogonal to the axis of rotation (X3, X4) of the wheel (3, 4) (see Fig. 2A), whereas when the float (5, 8) is in extended position (see Fig. 4A), said first face (51 , 81 ) and said second face (52, 82) are substantially parallel to the axis of rotation (X3, X4) of the wheel (3, 4).

[0051] Again with reference to Figs. 5 and 5A, the perimeter edge (53, 83) comprises a first section (531 , 831 ) suitable for facing the amphibious bicycle when the float (5, 8) is in extracted position, and a second section (532, 832) facing the opposite direction.

[0052] Preferably, the first face (51 , 81 ) and the second face (52, 82) are shaped as a segment of a circle, and said perimeter edge (53, 83) comprises a rectilinear section coinciding with said first section (531 , 831 ) of the perimeter edge (53, 83), and a curvilinear section shaped as an arc of a circle comprising said second section (532, 832) opposite said first section (531 , 831 ).

[0053] Each float (5, 8) may be hollow with a cavity that contains air, or it may be solid and made of a low-density material.

[0054] Each float (5, 8) has a channel (C) that crosses the float (5, 8) from the first section (531 , 831 ) of the perimeter edge (53, 83) to the second section (532, 832) of the perimeter edge (53, 83).

[0055] The channel (C) has a first opening (C1 ) which is formed on the first face (51 , 81 ) of the float (5, 8) and ends in the first section (531 , 831 ) of the perimeter edge (53, 83), and a second opening (C2) which is formed on the second face (52, 82) and ends in the second section (532, 832) of the perimeter edge (53, 83). The channel (C) is laterally defined by two inner surfaces (54, 84) of the float (5, 8) that are parallel and opposite each other.

[0056] With reference to Figs. 1 -4B, for each front float (5), the amphibious bicycle (100) also comprises a movable wing (59) that is movably connected to the respective front float (5) in such a way as to be alternately disposed in an idle position (see Fig. 2B), wherein the movable wing (59) is substantially parallel to the first face (51 ) and to the second face (52) of the front float (5), and in an operating position (see Fig. 4B), wherein the movable wing (59) protrudes orthogonally from the second face (52) of the front float (5) so as to operate as a rudder blade for the amphibious bicycle (100). The movable wing (59) that operates as a rudder blade is designed to deflect the water flow under the amphibious bicycle (100).

[0057] Preferably, the movable wing (59) is hinged to the front float (5) and rotates relative to the front float (5) between the idle position and the operating position.

[0058] In particular, the movable wing (59) is hinged to the two parallel and opposite inner surfaces (54, 84) of the float (5, 8) close to the second section (532) of the perimeter edge around a transverse axis of rotation (R59), preferably perpendicular to the longitudinal axis of the channel (C). When the movable wing (59) is in idle position, said movable wing (59) is completely recessed inside the channel (C) and does not protrude from the second face (52) of the front float (5).

[0059] Said front connection and support assembly (6) is connected to the movable wing (59) in such a way to also operate the movable wing (59) so that: when the front float (5) is in extended position, the movable wing (59) is in operating position; when the front float (5) is in retracted position, the movable wing (59) is in idle position.

[0060] With reference to Figs. 1 , 1A, 2A, 2B, and 2C, each front and rear connection assembly (6, 9) comprises: a support frame (6a, 9a) integrally mounted to the steering assembly (2) or to the rear part (12) of the amphibious bicycle (100); at least one pantograph kinematic mechanism (6b, 9b), also known as a “lazy tong”, connected to the support frame (6a, 9a) and to the float (5, 8) and suitable for being extended or retracted in order to roto-translate the float (5, 8) between the extended position and the retracted position; actuator means (6c, 9c) connected to the support frame (6a, 9a) and to the pantograph kinematic mechanism (6b, 9b) to operate and move the pantograph kinematic mechanism (6b, 9b) in extension and retraction. Preferably, for each float (5, 8), the front and rear connection assembly (6, 9) comprises two identical pantograph kinematic mechanisms (6b, 9b) opposed and parallel to each other.

[0061] The two pantograph kinematic mechanisms (6b, 9b) cross the channel (C), one being located near one of the two inner surfaces (54, 84) of the float (5, 8) and the other being located near the other inner surface (54, 84) of the float (5, 8).

[0062] With reference to Fig. 4, the support frame (6a) of the front connection and support assembly (6) comprises a fixing body (60) that is fixed to the steering assembly (2), a pair of steering columns (61 ) located on one side of the front wheel (3), and a pair of steering columns (61 ) located on the other side of the front wheel (3). The steering columns (61 ) extend inferiorly from the fixing body (60).

[0063] Still with reference to Fig. 4, the support frame (9a) of the rear connection and support assembly (9) comprises a fixing body (90) that is fixed to the rear part (12) of the amphibious bicycle (100), a pair of steering columns (91 ) located on one side of the rear wheel (4) and a pair of steering columns (91 ) located on the other side of the rear wheel (4). The steering columns (91 ) extend inferiorly from the fixing body (90).

[0064] With reference to Figs. 2B, 3B, and 4B, the pantograph kinematic mechanism (6b, 9b) of each connection group (6, 9) comprises: a first lever (L1 ) comprising a first end (L11 ) hinged to a lower end of the steering column (61 , 91 ) by means of a first pin (P1 ), a second end (L12) and an intermediate portion (L13); a second lever (L2) crossed with the first lever (L1 ), having a first end (L21 ) hinged to a carriage mounted to slide along the steering column (61 , 91 ) by means of a second pin (P2), a second end (L22) and an intermediate portion (L23) hinged to the intermediate portion (L13) of the first lever (L1 ) by means of a third pin (P3); a third lever (L3) integrally fixed to the float (5, 8) (namely, to the inner surface (54, 84) of the float), and comprising a first end (L31 ) whereto the second end (L22) of the second lever (L2) is hinged by means of a fourth pin (P4), a second end (L32) and an intermediate portion (L33); a fourth lever (L4) crossed with the third lever (L3), having a first end (L41 ) hinged to the second end (L12) of the first lever (L1 ) by means of a fifth pin (P5), a second end (L42), and an intermediate portion (L43) that is hinged to the intermediate portion (L33) of the third lever (L3) by means of a sixth pin (P6).

[0065] For each float (5, 8), the actuator means (6c, 9c) comprise a cylinderpiston assembly (G) having a cylinder and a piston, one of which is hinged to the support frame (6a) by means of a fixed pin (PF) and the other one is hinged to the first lever (L1 ) by means of a movable pin (PM).

[0066] By extending or contracting the cylinder-piston assembly (G), the first lever (L1 ) is pulled or pushed, thus moving all the other levers (L2, L3, L4) and therefore the float (5, 8) between the retracted position and the extracted position.

[0067] With reference to Figs. 2B, 3B, and 4B, evidently, the actuation of the cylinder-piston assembly (G) involves the entire actuation and movement of the levers (L1 , L2, L3, L4) of the pantograph kinematic mechanism (6b, 9b).

[0068] The cylinder-piston assemblies (G) of the actuator means (6c, 9c) of the connection assemblies (6, 9) are of pneumatic or hydraulic type and are all actuated by a single pump or compressor that is in turn actuated by an electric motor mounted on board the amphibious bicycle (100) and not shown in the attached figures. Said electric motor is powered by a conventional battery, which is also not shown in the attached figures. Therefore, by activating the electric motor, the pump or compressor is activated, which in turn simultaneously activates all four cylinder-piston assemblies (G), thus obtaining a simultaneous movement of the floats (5, 8) between the retracted and extracted position.

[0069] With reference to Figs. 2B, 3B, and 4B, in addition to the first lever (L1 ), the second lever (L2), the third lever (L3) and the fourth lever (L4), each pantograph kinematic mechanism (6b) of the front connection and support assembly (6) comprises additional levers (L5, L6) suitable for operating and moving the movable wing (59) between the idle position and the operating position.

[0070] In particular, each pantograph kinematic mechanism (6b) of the front connection and support assembly (6) comprises: a fifth lever (L5) having a first end (L51 ) hinged to the second end (L42) of the fourth lever (L4) by means of a seventh pin (P7), and a second end (L52); a sixth lever (L6) integrally fixed to the movable wing (59) and comprising a first end (L61 ) hinged to the second end (L52) of the fifth lever (L5) by means of an eighth pin (P8), and a second end (L62) hinged to the front float (5) (namely to the inner surface of the front float (5)) by means of a ninth pin (P9) that allows the movable wing (59) to rotate about said axis of rotation (R59) transverse to the longitudinal axis of the channel (C).

[0071] The pantograph kinematic mechanisms (9b) of the rear connection and support assembly (9) may comprise the fifth and sixth levers (L5, L6) or, being devoid of the movable wing (59), they may also be devoid of the fifth and sixth lever (L5, L6).

[0072] Following the above description, the advantages of the present invention are now evident.

[0073] In fact, the new amphibious bicycle (100) equipped with the connection groups (6, 9) allows the floats to be positioned in a compact configuration so that they are not cumbersome when the bicycle is traveling on a road or ground. Furthermore, the amphibious bicycle (100) according to the invention allows a user to set the bicycle in “ground” or “water” operating mode in an extremely quick and easy way.

[0074] Another purpose of the present invention is to devise an amphibious bicycle that is efficient, functional, robust, and inexpensive to manufacture.

[0075] Numerous modifications can be made to the present embodiment of the invention, which are within the reach of an expert of the field and fall in any case within the scope of the invention as disclosed by the attached claims.

Claims

CLAIMS1. Amphibious bicycle (100) comprising:- a frame (1 ) having a front part (11 ) and a rear part (12);- a steering assembly (2) rotatably connected to the front part (11 ) of the frame (1 ) and comprising a handlebar (21 ) and a fork (22);- a front wheel (3) having a hub (30) rotatably connected to the fork (22) about an axis of rotation (X3), an outer rim (31 ) connected to the hub (30), and a tire (32) arranged around the outer rim (31 );- a rear wheel (4) having a hub (40) rotatably connected to the rear part (12) of the frame (1 ) about an axis of rotation (X4), an outer rim (41 ) connected to the hub (40), and a tire (42) arranged around the outer rim (41 );- two pedals (P) rotatably connected to the frame (1 ) by respective pedal cranks (Px);- a transmission assembly (G) connecting the pedals (P) to the rear wheel (4) to transmit the movement of the pedals (P) to the rear wheel (4);- two front floats (5) disposed in opposite position on either side of the front wheel (3) and suitable for making the amphibious bicycle (100) float when the amphibious bicycle (100) is placed on water;- water propulsion means (7) arranged on the rear wheel (4) and configured to operate on water to set the amphibious bicycle (100) in motion when the amphibious bicycle (100) is placed on water; characterized by the fact that it comprises a front connection and support assembly (6) that supports and movably connects each front float (5) to the steering assembly (2) in such a way that each front float (5) can be alternately disposed in a retracted position, wherein the front float (5) is positioned close to and alongside the front wheel (3), and in an extracted position, wherein the front float (5) is in distal position with respect to the front wheel (3).

2. The amphibious bicycle (100) according to claim 1 , comprising two rear floats (8) disposed in opposite position on either side of the rear wheel (4); wherein said amphibious bicycle (100) comprises a rear connection and support assembly (9) that supports and movably connects each rear float (8) to the rear part (12) of the frame (1 ) in such a way that each rear float (8) can be alternately disposed in a retracted position, wherein the rear float (8) is positioned close toand alongside the rear wheel (4), and in an extracted position, wherein the rear float (8) is in distal position with respect to the rear wheel (4).

3. The amphibious bicycle (100) according to claim 1 or 2, wherein each float (5, 8) has the shape of a solid having a first face (51 , 81 ) and a second face (52, 82) opposite each other and a perimeter edge (53, 83); wherein, when said float (5, 8) is in retracted position, said first face (51 , 81 ) and said second face (52, 82) are substantially orthogonal to the axis of rotation (X3, X4) of the wheel (3, 4), whereas, when the float (5, 8) is in extended position, said first face (51 , 81 ) and said second face (52, 82) are substantially parallel to the axis of rotation (X3, X4) of the wheel (3, 4); wherein said perimeter edge (53, 83) comprises a first section (531 , 831 ) suitable for facing the amphibious bicycle (100) when the float (5, 8) is in extracted position, and a second section (532, 832) facing the opposite direction.

4. The amphibious bicycle (100) according to claim 3, wherein said first face (51 , 81 ) and said second face (52, 82) are shaped as a segment of a circle and said perimeter edge (53, 83) comprises a rectilinear section coinciding with said first section (531 , 831 ) of the perimeter edge (53, 83), and a curvilinear section shaped as an arc of a circle comprising said second section (532, 832) opposite said first section (531 , 831 ).

5. The amphibious bicycle (100) according to claim 3 or 4, wherein each float (5, 8) has a channel (C) that crosses the float (5, 8) from the first section (531 , 831 ) of the perimeter edge (53, 83) to the second section (532, 832) of the perimeter edge (53, 83); wherein said channel (C) has a first opening (C1 ) which is formed on the first face (51 , 81 ) of the float (5, 8) and ends in the first section (531 , 831 ) of the perimeter edge (53, 83), and a second opening (C2) which is formed on the second face (52, 82) and ends in the second section (532, 832) of the perimeter edge (53, 83); wherein said channel (C) is laterally defined by two inner surfaces (54, 84) of the float (5, 8) that are parallel and opposite each other.

6. The amphibious bicycle (100) according to any of the preceding claims, comprising a movable wing (59) for each front float (5), said movable wing (59) being movably connected to the respective front float (5) in such a way as to be alternately disposed in:- an idle position, wherein the movable wing (59) is substantially parallel to the second face (52) of the front float (5); and- an operating position, wherein the rotating wing (59) protrudes orthogonally from the second face (52) of the front float (5) so as to operate as a rudder blade for the amphibious bicycle (100).

7. The amphibious bicycle (100) according to claim 6, wherein said movable wing (59) is hinged to the front float (5) so as to rotate relative to the front float (5) between the idle position and the operating position.

8. The amphibious bicycle (100) according to claim 7 when dependent on claim 5, wherein said movable wing (59) is hinged to the two parallel and opposite inner surfaces (54, 84) of the float (5, 8) close to the second section (532) of the perimeter edge around an axis of rotation (R59) transverse to the longitudinal axis of the channel (C); wherein, when said movable wing (59) is in idle position, said movable wing (59) is completely recessed in the channel (C) and does not protrude from the second face (52) of the front float (5).

9. The amphibious bicycle (100) according to any of claims 6 to 8, wherein said front connection and support assembly (6) is connected to the movable wing (59) in such a way as to also operate the movable wing (59) so that: when the front float (5) is in extended position, the movable wing (59) is in operating position; when the front float (5) is in retracted position, the movable wing (59) is in idle position.

10. The amphibious bicycle (100) according to any of the preceding claims, wherein each connection assembly (6, 9) comprises: a support frame (6a, 9a) integrally mounted to the steering assembly (2) or to the rear part (12) of the amphibious bicycle (100); at least one pantograph kinematic mechanism (6b, 9b) connected to the support frame (6a, 9a) and to the float (5, 8) and suitable for being extended or retracted in order to roto-translate the float (5, 8) between the extended position and the retracted position; actuator means (6c, 9c) connected to the support frame (6a, 9a) and to the pantograph kinematic mechanism (6b, 9b) to operate and move the pantograph kinematic mechanism (6b, 9b) in extension and retraction.

11. The amphibious bicycle (100) according to claim 10 when dependent on claim 5, wherein the at least one pantograph kinematic mechanism (6b, 9b) crosses the channel (C).

12. The amphibious bicycle (100) according to claim 1 1 or 10, wherein the support frame (6a, 9a) of the connecting assembly (6, 9) comprises a fixing body (90) that is fixed to the steering assembly (2) of the amphibious bicycle (100) or to the rear part (12) of the amphibious bicycle (100) and at least one steering column (61 , 91 ) located on one side of the front wheel (3, 4) and a steering column (61 , 91 ) located on the other side of the wheel (3, 4); wherein the pantograph kinematic mechanism (6b, 9b) of each connecting assembly (6, 9) comprises: a first lever (L1 ) comprising a first end (L11 ) hinged to a lower end of the steering column (61 , 91 ) by means of a first pin (P1 ), a second end (L12) and an intermediate portion (L13); a second lever (L2), crossed with the first lever (L1 ), having a first end (L21 ) hinged to a carriage mounted to slide along the steering column (61 , 91 ) by means of a second pin (P2), a second end (L22) and an intermediate portion (L23) hinged to the intermediate portion (L13) of the first lever (L1 ) by means of a third pin (P3); a third lever (L3) integrally fixed to the float (5, 8) and comprising a first end (L31 ) whereto the second end (L22) of the second lever (L2) is hinged by means of a fourth pin (P4), a second end (L32) and an intermediate portion (L33); a fourth lever (L4) crossed with the third lever (L3), having a first end (L41 ) hinged to the second end (L12) of the first lever (L1 ) by means of a fifth pin (P5), a second end (L42), and an intermediate portion (L43) that is hinged to the intermediate portion (L33) of the third lever (L3) by means of a sixth pin (P6); wherein, for each float (5, 8), the actuator means (6c, 9c) comprise a cylinder-piston assembly (G) hinged to the support frame (6a) by means of a fixed pin (PF) and to the first lever (L1 ) by means of a movable pin (PM).

13. The amphibious bicycle (100) according to claim 12, wherein, in addition to the first lever (L1 ), the second lever (L2), the third lever (L3) and the fourth lever (L4), each pantograph kinematic mechanism (6b) of the front connection assembly (6) comprises additional levers (L5, L6) suitable for operating and moving the movable wing (59) between the idle position and the operating position.

14. The amphibious bicycle (100) according to any of the preceding claims, wherein said water propulsion means (7) comprise a plurality of paddles(70) extending radially from the hub (40) of the rear wheel (4) to the outer rim (41 ) of the rear wheel (4).

Images