An airdroppable amphibious assault boat

Abstract

The invention discloses an airdrop amphibious assault boat, comprising an assault boat body; a front driving wheel installed at the front of the assault boat body; a front driving wheel lifting and driving mechanism installed at the front of the assault boat body for driving the front driving wheel to lift and lower; a rear driving wheel installed at the tail of the assault boat body; a rear driving wheel lifting and driving mechanism and a rear driving wheel rotating driving mechanism installed at the tail of the assault boat body for driving the rear driving wheel to lift and rotate. When the airdrop amphibious assault boat disclosed by the invention travels on the water surface, both the front and rear driving wheels can rise upward to be above the water surface, thereby reducing the resistance generated by the driving wheels and the water surface when the assault boat travels on the water surface. Furthermore, when traveling on land, the driving wheels can be lowered and contact the land. At the same time, since the driving wheels can turn, it is convenient for the assault boat to turn and travel in different directions when traveling on land.

Description

Technical Field

[0001] The invention relates to the technical field of assault boats, in particular to an airdroppable amphibious assault boat. Background Art

[0002] Amphibious assault boats are mainly used in water rescue and disaster relief or military beach landing and other fields. However, existing amphibious assault boats have the following disadvantages: since amphibious assault boats need to be able to travel on water and land, it is necessary to set driving wheels on the hull of the assault boat. However, when the existing assault boats are traveling on the water, their driving wheels are not easy to disassemble or cannot be retracted into the hull, so that when the assault boats are traveling on the water, the driving wheels interact with the water surface, generating a large resistance, which affects the speed of the assault boats on the water surface. At the same time, when traveling on the road, the existing assault boats can only move along the bow direction, making it inconvenient to turn and change the movement mode during the land driving process, thereby affecting its land driving performance. Summary of the invention

[0003] In view of the above problems, the present invention proposes an airdroppable amphibious assault boat.

[0004] The technical means adopted by the present invention are as follows:

[0005] An airdroppable amphibious assault boat, comprising:

[0006] Assault boat hull;

[0007] A front driving wheel installed at the bow of the speedboat;

[0008] A front driving wheel lifting drive mechanism installed at the front of the speedboat body for driving the front driving wheel to lift;

[0009] A rear drive wheel installed at the tail of the speedboat;

[0010] A rear drive wheel lifting drive mechanism installed at the tail of the speedboat body for driving the rear drive wheel to lift;

[0011] A rear drive wheel rotation drive mechanism installed at the rear of the speedboat body for driving the rear drive wheel to rotate; and

[0012] A propeller is installed on the hull of the speedboat and is used to drive the hull of the speedboat to move.

[0013] Furthermore, the rear drive wheel lifting drive mechanism includes a fixing plate, a mounting base, a card holder, a power device, a positioning tooth and a gear shifting mechanism;

[0014] The fixing plate is vertically fixed to the tail of the speedboat body;

[0015] The card holder is mounted on the fixed plate, and the card holder can move up and down along the vertical direction on the fixed plate;

[0016] The mounting base is fixedly mounted at the lower part of the card support and the mounting base is arranged horizontally, and the power device for driving the card support to move downward is installed between the card support and the fixing plate;

[0017] A toggle protrusion and a limit protrusion are sequentially arranged on one side of the card holder from top to bottom, a first reset wedge is arranged on the upper part of the limit protrusion, a limit clamping surface is arranged on the lower part of the limit protrusion, and a toggle stop surface is arranged on the lower part of the toggle protrusion;

[0018] The positioning tooth is hinged on one side of the fixing plate provided with a limiting protrusion, and the positioning tooth is provided with a limiting block and a triggering tooth;

[0019] The limit block is provided with a second reset wedge, and when the bracket moves upward relative to the fixed plate, the first reset wedge and the second reset wedge contact each other and drive the positioning tooth to rotate, and when the limit protrusion slides over the limit block, the limit clamping surface is clamped with the upper end surface of the limit block;

[0020] The gear shifter mechanism comprises a gear shifter and a gear shifter driving motor for driving the gear shifter to rotate;

[0021] The gear shifter comprises a triggering gear shifting tooth and a protruding block shifting tooth arranged along the axial direction of the gear shifter rod body, and the triggering gear shifting tooth and the protruding block shifting tooth are vertically arranged along the circumferential direction of the gear shifter rod body;

[0022] The trigger tooth and the trigger tooth are in the same plane, the protrusion tooth and the toggle protrusion are in the same plane, and when the gear shifter driving motor drives the gear shifter to rotate, the gear shifter can sequentially realize the action of the trigger tooth and the trigger tooth to drive the positioning tooth to rotate and the action of the protrusion tooth and the toggle protrusion to drive the card holder to move upward in the vertical direction.

[0023] Furthermore, the rear drive wheel lifting and lowering drive mechanism also includes an elastic reset mechanism, which includes multiple groups of springs. The multiple groups of springs are arranged between the mounting base and the body of the speedboat. When the mounting base is driven to descend by the supporting member, the mounting base compresses the springs. When the mounting base is driven to rise by the supporting member, the restoring force of the springs drives the mounting base to rise.

[0024] Further, the rear drive wheel rotation drive mechanism includes a sprocket mechanism, a sprocket drive mechanism, a rear drive wheel support arm and a chain mechanism mounting seat;

[0025] The chain mechanism mounting seat is mounted on the mounting base, and the rear driving wheel support arm is fixedly mounted on one end of the chain mechanism mounting seat extending out of the speedboat body;

[0026] A rear drive wheel fork frame is installed on the rear drive wheel support arm, and the rear drive wheel fork frame is installed on the rear drive wheel;

[0027] The sprocket mechanism is installed on the chain mechanism mounting seat, and the sprocket mechanism includes a driving sprocket, a driven sprocket and a chain. The driven sprocket is installed on the chain mechanism mounting seat and is provided with one end of the rear drive wheel support arm, and the driven sprocket is connected to the rear drive wheel fork frame, and the driving sprocket is arranged at the other end of the chain mechanism mounting seat, and the driving sprocket and the driven sprocket are connected through the chain;

[0028] The sprocket drive mechanism is arranged at one end close to the driving sprocket, and the sprocket drive mechanism can drive the driving sprocket to rotate, and then the sprocket mechanism and the rear driving wheel fork frame drive the rear driving wheel to turn.

[0029] Further, the sprocket drive mechanism includes a gear, a rack and a second hydraulic cylinder;

[0030] The gear is coaxially fixedly connected with the driving sprocket, the second hydraulic cylinder is installed on the mounting base, the rack is fixedly installed on the hydraulic rod of the second hydraulic cylinder, the gear is meshed with the rack, and when the second hydraulic cylinder drives the rack to reciprocate in a linear direction, the rack drives the gear to rotate and then drives the driving sprocket to rotate.

[0031] Furthermore, contact switches are installed at both ends of the rack's linear motion stroke.

[0032] Furthermore, the front driving wheel lifting drive mechanism includes a front driving wheel support arm and a third hydraulic cylinder, one end of the front driving wheel support arm is hinged to the bow of the speedboat body, and the other end is equipped with the front driving wheel, one end of the third hydraulic cylinder is hinged to the bow of the speedboat body, and the other end is hinged to the front driving wheel support arm, and the extension and retraction of the piston rod of the third hydraulic cylinder can drive the front driving wheel support arm to swing in the vertical direction, thereby realizing the lifting and lowering of the front driving wheel.

[0033] Furthermore, the assault boat hull includes a deck, a rib plate, a keel plate and a hull pipe frame;

[0034] The deck, ribs and keel plates are installed on the boat body tube frame, and the deck, ribs and keel plates are mutually engaged through a slot structure;

[0035] A watertight cavity separated from each other is formed between the deck, the rib plate and the keel plate.

[0036] Furthermore, the body of the speedboat is made of high-density polyethylene material.

[0037] Furthermore, the front drive wheels and the rear drive wheels are hydraulic motor driven wheels.

[0038] Compared with the prior art, the airdroppable amphibious assault boat disclosed in the present invention has the following beneficial effects: since a front driving wheel lifting drive mechanism capable of driving the front driving wheel to lift and lower, a rear driving wheel lifting drive mechanism capable of driving the rear driving wheel to lift and rotate and a rear driving wheel rotation drive mechanism are provided, when the assault boat disclosed in the present application is traveling on the water surface, both the front and rear driving wheels can be lifted upward to be above the water surface, thereby reducing the resistance generated by the interaction between the driving wheels and the water surface when the assault boat is traveling on the water surface; further, when traveling on land, the driving wheels can be lowered and contact the land; at the same time, since the driving wheels can be turned, it is convenient for the assault boat to turn and travel in different ways (different directions of travel) when traveling on land. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is an axial view of the airdroppable amphibious assault boat disclosed in the present invention;

[0040] Figure 2 It is a side view of the airdroppable amphibious assault boat disclosed by the present invention;

[0041] Figure 3 A top view of the airdroppable amphibious assault boat disclosed in the present invention;

[0042] Figure 4 It is a rear view of the airdroppable amphibious assault boat disclosed by the present invention;

[0043] Figure 5 It is a front view of the airdroppable amphibious assault boat disclosed by the present invention;

[0044] Figure 6 It is an axial view of the hull of the airdroppable amphibious assault boat disclosed in the present invention;

[0045] Figure 7 It is an axial view of the hull of the airdroppable amphibious assault boat disclosed by the present invention, in which part of the deck is not shown;

[0046] Figure 8 It is a structural diagram of the connection between the middle rib plate and the keel plate of the airdroppable amphibious assault boat disclosed in the present invention;

[0047] Fig. 9It is a structural diagram of the rear drive wheel assembly of the airdroppable amphibious assault boat disclosed in the present invention, including a rear drive wheel, a rear drive wheel lifting drive mechanism and a rear drive wheel rotating drive mechanism;

[0048] Fig.10 for Fig. 9 A top view of

[0049] Fig.11 for Fig. 9 Axis view of

[0050] Fig.12 It is an axial view of the rear drive wheel lifting drive mechanism;

[0051] Fig.13 The structure diagram of the card holder;

[0052] Fig.14 This is a structural diagram of the gear shifter;

[0053] Fig.15 It is the structural diagram of the positioning gear;

[0054] Fig.16 This is a diagram of the first working state of the rear drive wheel lifting drive mechanism in the present invention. At this time, the rear drive wheel is in a lifted state, and the gear shifter rotates under the drive of the gear shifter drive motor, so that the triggering tooth and the triggering tooth are in a just-contact state;

[0055] Fig.17 This is a second working state diagram of the rear driving wheel lifting drive mechanism in the present invention. At this time, the gear shifter rotates under the drive of the gear shifter driving motor, so that the triggering tooth and the triggering tooth act on each other to rotate the positioning tooth, thereby causing the limit block to move away from the limit protrusion, and the hydraulic cylinder starts to drive the card support member downward;

[0056] Fig.18 This is a diagram of the third working state of the rear drive wheel lifting drive mechanism in the present invention. At this time, the gear shifter continues to rotate under the drive of the gear shifter driving motor, and the triggering gear shifter is separated from the triggering gear, and the hydraulic cylinder continues to drive the card support downward, thereby causing the rear drive wheel to fall;

[0057] Fig.19 This is a fourth working state diagram of the rear driving wheel lifting drive mechanism in the present invention, at which the gear shifter rotates under the drive of the gear shifter driving motor, and the convex shifting teeth of the gear shifter contact with the shifting stop surface of the shifting convex block to realize that the gear shifter drives the card holder to rise;

[0058] Fig. 20 This is a fifth working state diagram of the rear drive wheel lifting drive mechanism in the present invention, at which the gear shifter rotates under the drive of the gear shifter driving motor, and the convex shifting teeth of the gear shifter contact with the shifting stop surface of the shifting convex block to realize that the gear shifter drives the card holder to rise, and the first reset wedge and the second reset wedge contact to drive the positioning tooth to rotate;

[0059] Fig.21 A top view of the rear drive wheel rotation drive mechanism of the present invention;

[0060] Fig. 22 It is a bottom view of the rear drive wheel rotation drive mechanism in the present invention.

[0061] In the figure: 1, assault boat hull, 10, deck, 100, groove, 11, rib, 110, boss, 12, keel plate, 13, hull pipe frame, 14, watertight cavity, 15, slot structure, 150, opening slot, 2, front drive wheel, 3, front drive wheel lifting drive mechanism, 30, front drive wheel support arm, 300, front drive wheel support arm mounting seat, 31, third hydraulic cylinder, 4, rear drive wheel, 5, rear drive wheel lifting drive mechanism, 50, fixing plate, 500, stop column, 51, mounting base, 52, support member, 520, toggle convex block, 521, limit convex block, 5210, first reset oblique split, 5211, limit clamping surface, 5200, toggle stop surface, 522, slide groove, 53, power device, 54, gear shifter mechanism, 540, gear shifter, 5400 , trigger tooth shifting tooth, 5401, protruding block shifting tooth, 542, gear shifter mounting plate, 55, positioning tooth, 550, limit block, 551, trigger tooth, 5500, second reset wedge, 56, spring reset mechanism, 560, spring, 561, spring holder, 6, rear drive wheel rotation drive mechanism, 60, sprocket mechanism, 600, active sprocket, 601, driven sprocket, 602, chain, 61, sprocket drive mechanism, 610, gear, 611, rack, 612, second hydraulic cylinder, 613, contact switch, 62, rear drive wheel support arm, 63, chain mechanism mounting seat, 64, rear drive wheel fork frame, 640, fork frame body, 641, fork frame shaft, 65, sprocket drive mechanism mounting seat, 66, wedge block, 7, propeller, 70, impeller, 8, hydraulic motor. DETAILED DESCRIPTION

[0062] like Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 The invention discloses an air-droppable amphibious assault boat, comprising:

[0063] Speedboat body 1;

[0064] A front driving wheel 2 installed at the bow of the speedboat body 1;

[0065] A front driving wheel lifting drive mechanism 3 installed at the front of the speedboat body 1 for driving the front driving wheel 2 to lift;

[0066] A rear driving wheel 4 installed at the tail of the speedboat body 1;

[0067] A rear drive wheel lifting drive mechanism 5 installed at the rear of the speedboat body 1 and used for driving the rear drive wheel 4 to lift;

[0068] A rear drive wheel rotation drive mechanism 6 installed at the rear of the speedboat body 1 for driving the rear drive wheel 4 to rotate; and

[0069] A propeller 7 is installed on the speedboat body 1 and is used to drive the speedboat body 1 to move.

[0070] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the assault boat body 1 is made of high-density polyethylene material, and the assault boat body 1 includes a deck 10, a rib plate 11, a keel plate 12 and a boat body pipe frame 13; the deck 10, the rib plate 11 and the keel plate 12 are installed on the boat body pipe frame 13, and the deck 10, the rib plate 11 and the keel plate 12 are mutually engaged through a slot structure 15. In this embodiment, Figure 6 , Figure 7 and Figure 8 As shown, the ribs 11 and the keel plates 12 are both processed with a plurality of open grooves 150, and the open grooves 150 on the ribs 11 and the keel plates 12 can be engaged with each other to form a cross clamp structure, a plurality of bosses 110 are processed on the upper edges of the ribs 11 and / or the keel plates, and a plurality of grooves 100 are processed on the deck 10, and when the deck 10 is installed on the ribs 11, the bosses 110 on the ribs 11 are inserted into the grooves 100 on the deck 10; and a watertight cavity 14 separated from each other is formed between the deck 10, the ribs 11 and the keel plates 12. A cross clamp structure is formed between the rib plate 11 and the keel plate 12 through the open groove 150, and the deck is clamped with the rib plate and / or the keel plate through the boss and groove structure, which can improve the strength of the boat body and prevent the rib plate from moving back and forth along the horizontal plane. A watertight cavity is formed between the deck 10, the rib plate 11 and the keel plate 12, and the watertight cavities are not connected to each other, which can maximize the buoyancy. At the same time, the speedboat body 1 is made of high-density polyethylene material with a lighter overall weight, which is more suitable for airdrops than traditional speedboats. A boat body pipe rack is installed on the outside of the boat body. The boat body pipe rack is a circular tube with a hollow interior, which can effectively reduce the force on the hull during a collision.

[0071] like Figure 2As shown, a front driving wheel lifting drive mechanism 3 is installed at the bow of the speedboat hull 1. In this embodiment, the front driving wheel lifting drive mechanism 3 is installed on the hull pipe frame 13 at the bow of the boat. The front driving wheel lifting drive mechanism 3 includes a front driving wheel support arm 30 and a third hydraulic cylinder 31. One end of the front driving wheel support arm 30 is hinged to the bow of the speedboat hull 1, that is, a front driving wheel support arm mounting seat 300 is fixed on the hull pipe frame 13, and one end of the front driving wheel support arm 30 is mounted on the front hull pipe frame 13 through a rotating shaft. On the driving wheel support arm mounting seat 300, the other end of the front driving wheel support arm 30 is a fork frame structure, and the front driving wheel 2 is mounted on the fork frame structure. One end of the third hydraulic cylinder 31 is hinged to the bow of the assault boat body 1 (the boat body pipe frame 13) through the hydraulic cylinder mounting seat, and the other end is hinged to the front driving wheel support arm 30. The extension and retraction of the piston rod of the third hydraulic cylinder 31 can drive the front driving wheel support arm 30 to swing in the vertical direction, thereby realizing the lifting and lowering of the front driving wheel 2.

[0072] like Fig. 9 , Fig.10 , Fig.11 as well as Fig.12 As shown, the rear driving wheel lifting drive mechanism 5 includes a fixing plate 50, a mounting base 51, a card holder 52, a power device 53, a positioning tooth 55 and a gear shifting mechanism 54;

[0073] The fixing plate 50 is vertically fixed to the tail of the speedboat hull 1. In this embodiment, the fixing plate 50 is vertically installed in the inner cavity of the tail end of the hull pipe frame 13;

[0074] like Fig.13 As shown, the card support 52 is installed on the fixed plate 50, and the card support 52 can move up and down along the vertical direction on the fixed plate 50. Specifically, a cylindrical stopper 500 is provided on the fixed plate 50, and a slide groove 522 is provided on the card support 52 along the vertical direction. The card support 52 can be installed on the fixed plate 50 through a conventional sliding connection structure such as a guide rail, and the stopper 500 is inserted into the slide groove 522;

[0075] The mounting base 51 is fixedly mounted on the lower part of the card support 52 and the mounting base 51 is horizontally arranged. The power device 53 for driving the card support 52 to move downward is installed between the card support 52 and the fixed plate 50. The mounting base 51 is used to install the rear drive wheel rotation drive mechanism 6. In this embodiment, the power device 53 is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixedly mounted on the mounting base or the card support. The end of the piston rod of the hydraulic cylinder abuts against the stop column. Preferably, a T-shaped abutment plate is provided at the end of the piston rod of the hydraulic cylinder to facilitate the abutment of the piston rod end against the stop column. When the piston rod of the hydraulic cylinder is extended, the piston rod drives the card support and the mounting base to move downward relative to the fixed plate.

[0076] One side of the card holder 52 is provided with a toggle protrusion 520 and a limiting protrusion 521 in sequence from top to bottom. The limiting protrusion 521 is provided with a first reset wedge 5210 at the upper part, and a limiting clamping surface 5211 is provided at the lower part of the limiting protrusion 521. The lower part of the toggle protrusion 520 is provided with a toggle stop surface 5200. In this embodiment, the cross-sectional shape of the toggle protrusion 520 and the limiting protrusion 521 is approximately a right-angled trapezoidal structure, and the hypotenuse of the right-angled trapezoid is inclined downward.

[0077] like Fig.15 As shown, the positioning tooth 55 is hinged on one side of the fixing plate 50 provided with the limiting protrusion 521, and the positioning tooth 55 is provided with a limiting block 550 and a triggering tooth 551. Specifically, the limiting block and the triggering tooth are plate structures arranged at a certain angle, and the thickness of the limiting block is greater than the thickness of the triggering tooth so that the upper end surface of the limiting block forms a structure capable of being engaged with the limiting protrusion;

[0078] The limit block 550 is provided with a second reset wedge 5500. When the card holder 52 moves upward relative to the fixed plate 50, the first reset wedge 5210 and the second reset wedge 5500 contact each other and drive the positioning tooth 55 to rotate. When the limit protrusion 521 slides over the limit block 550, the limit clamping surface 5211 is clamped with the upper end surface of the limit block 50.

[0079] like Fig.14 As shown, the gear shifter mechanism 54 includes a gear shifter 540 and a gear shifter driving motor (not shown in the figure) for driving the gear shifter 540 to rotate. In this embodiment, the gear shifter 540 and the gear shifter driving motor are fixed to the body of the speedboat through a gear shifter mounting plate 542;

[0080] The gear shifter 540 comprises a trigger tooth shifter 5400 and a protruding block shifter 5401 arranged along the axial direction of the gear shifter rod body, the trigger tooth shifter 5400 and the protruding block shifter 5401 are arranged vertically along the circumferential direction of the gear shifter rod body, specifically, the gear shifter is a cylindrical rod body structure, the cylindrical rod body is provided with two rod structures arranged along the axial direction to form the trigger tooth shifter and the protruding block shifter respectively, the length of the trigger tooth shifter is less than the length of the protruding block shifter, the trigger tooth shifter and the protruding block shifter are not in the same plane and are arranged at an interval of 90 degrees, preferably, the trigger tooth shifter and the protruding block shifter each have two groups;

[0081] The trigger tooth shifting tooth 5400 and the trigger tooth 551 are in the same plane, and the protrusion shifting tooth 5401 and the shifting protrusion 520 are in the same plane. When the gear shifting device driving motor drives the gear shifting device 540 to rotate, the gear shifting device 54 can sequentially realize the action of the trigger tooth shifting tooth 5400 and the trigger tooth 551 to drive the positioning tooth 55 to rotate and the action of the protrusion shifting tooth 5401 and the shifting stop surface 5200 of the shifting protrusion 520 to drive the card support 52 to move upward in the vertical direction.

[0082] The process of the rear driving wheel lifting drive mechanism 5 disclosed in the present invention driving the rear driving wheel to lift is as follows:

[0083] Descending process: Fig.16 The rear drive wheel lifting mechanism is shown in the schematic diagram when the rear drive wheel is in the raised state. At this time, the limit block 550 of the positioning tooth 55 is located at the lower side of the limit protrusion 521, and the upper end surface 5501 of the limit block 550 abuts against the lower end surface (limit clamping surface 5211) of the limit protrusion 521 to form a clamping structure. The limit block of the positioning tooth can limit the downward movement of the clamping member. Fig.16 , Fig.17 as well as Fig.18 As shown, when the card holder and the mounting base need to move downward, the gear shifter driving motor drives the gear shifter to rotate, and the trigger gear and the trigger gear act together to drive the positioning gear to rotate. Fig.16 The state is transformed into Fig.17 In this process, the gear shifter rotates in the direction of arrow A in the figure, and the positioning tooth rotates in the direction of arrow B in the figure under the drive of the gear shifter, so that the limit block is away from the limit protrusion of the card holder. At the same time, the piston rod of the hydraulic cylinder (power device) extends outward, and the end of the piston rod abuts against the stop column, and then the hydraulic cylinder drives the card holder and the mounting base to move downward ( Fig.17 The hydraulic cylinder drives the card holder and the mounting base to move downward to the lower limit position, and the rear drive wheel mounted on the mounting base falls down to contact the land. At the same time, the gear shifter rotates further, so that the triggering gear is separated from the triggering gear, and the positioning gear is reset under the gravity of the limit block, and the limit block enters between the shifting protrusion and the limit protrusion.

[0084] Ascending process: Fig.19 As shown, when the rear driving wheel needs to be raised from the falling state, the gear shifter driving motor drives the gear shifter to rotate. At this time, the protruding gear and the shifting protrusion (shifting stop surface 5200) act to drive the card holder to move upward ( Fig.19 At the same time, the piston rod of the hydraulic cylinder contracts and moves, thereby realizing the lifting of the rear drive wheel. In the process of the card holder rising upward under the drive of the gear shifter, as shown in FIG. Fig. 20As shown, the second reset wedge 5500 of the limit block contacts the first reset wedge 5210 of the limit protrusion and drives the positioning tooth to rotate (in the direction shown by arrow B in the figure). When the supporting part rises to a certain height, the limit protrusion separates from the limit block, and the positioning tooth is reset under the action of the limit block so that the limit block is stuck in the lower part of the limit protrusion. At the same time, the protruding teeth of the gear shifter are separated from the shifting protrusion, and the upper end face of the limit block is engaged with the lower end face of the limit protrusion (limiting engaging surface), thereby preventing the supporting part from falling. At this time, the rear drive wheel is in a raised state and above the water surface.

[0085] Furthermore, the rear drive wheel lifting drive mechanism 5 also includes an elastic reset mechanism 56, which includes multiple groups of springs 560. The multiple groups of springs 560 are arranged between the mounting base 51 and the body of the speedboat. When the mounting base is driven to descend by the bracket, the mounting base compresses the spring. When the mounting base is driven to rise by the bracket, the restoring force of the spring drives the mounting base to rise. In this embodiment, the spring 560 is installed in the boat body pipe frame 13 through the spring bracket 561. By setting multiple groups of springs, the restoring force of the spring can assist the gear shifter mechanism to drive the bracket to rise, thereby ensuring the smooth lifting of the rear drive wheel.

[0086] like Fig.21 and Fig. 22 As shown, the rear drive wheel rotation driving mechanism 6 includes a sprocket mechanism 60, a sprocket drive mechanism 61, a rear drive wheel support arm 62 and a chain mechanism mounting seat 63;

[0087] The chain mechanism mounting seat 63 is mounted on the mounting base 51, and the rear driving wheel support arm 62 is fixedly mounted on one end of the chain mechanism mounting seat 63 extending out of the speedboat body 1;

[0088] A rear driving wheel fork frame 64 is mounted on the rear driving wheel support arm 62, and the rear driving wheel fork frame 64 is mounted on the rear driving wheel 4;

[0089] The sprocket mechanism 60 is installed on the chain mechanism mounting seat 63, and the sprocket mechanism 60 includes a driving sprocket 600, a driven sprocket 601 and a chain 602. The driven sprocket 601 is installed on the chain mechanism mounting seat 63 and is provided with one end of the rear drive wheel support arm 62, and the driven sprocket 601 is connected to the rear drive wheel fork frame 64. The driving sprocket 600 is arranged at the other end of the chain mechanism mounting seat 63, and the driving sprocket 600 and the driven sprocket 601 are connected through the chain 602.

[0090] The sprocket drive mechanism 61 is disposed at one end close to the driving sprocket 600 , and the sprocket drive mechanism 61 can drive the driving sprocket 600 to rotate, and then the sprocket mechanism 60 and the rear driving wheel fork 64 drive the rear driving wheel 4 to turn.

[0091] In this embodiment, the chain mechanism mounting seat 63 is a long box structure that can be buckled up and down, and the sprocket mechanism 60 is arranged in the long box structure. The rear drive wheel support arm 62 is a square frame structure. One end of the chain mechanism mounting seat 63 is inserted into the square frame structure (rear drive wheel support arm 62) and fixedly connected. The lower end of the rear drive wheel support arm 62 is provided with a rear drive wheel fork frame 64, and the rear drive wheel fork frame 64 includes a fork frame body 640 and a fork frame shaft 641. The rear drive wheel 4 is installed on the fork frame body 640, and the fork frame shaft 641 is fixed on the fork frame body 640, and the fork frame shaft 641 passes through the rear drive wheel support arm 62 and the chain mechanism mounting seat 63 and is connected to the driven sprocket 601. The driven sprocket 601 is installed on the fork frame shaft 641, and the driven sprocket 601 can drive the fork frame shaft 641 to rotate, thereby driving the rear drive wheel to rotate. The other end of the chain mechanism mounting seat 63 is installed with a driving sprocket 600 through a rotating shaft.

[0092] Further, the sprocket drive mechanism 61 includes a gear 610, a rack 611 and a second hydraulic cylinder 612;

[0093] The gear 610 is coaxially fixedly connected with the driving sprocket 600, the second hydraulic cylinder 612 is installed on the mounting base 51, the rack 611 is fixedly installed on the hydraulic rod of the second hydraulic cylinder 612, the gear 610 is meshed with the rack 611, and when the second hydraulic cylinder 612 drives the rack 611 to reciprocate in a straight line direction, the rack 611 drives the gear 610 to rotate and then drives the driving sprocket 600 to rotate.

[0094] In this embodiment, the chain mechanism mounting seat 63 is provided with a sprocket drive mechanism mounting seat 65 at the lower side of one end of the driving sprocket 600, and the sprocket drive mechanism mounting seat 65 is provided with a receiving groove, and the sprocket drive mechanism 61 is provided in the receiving groove. The second hydraulic cylinder 612 is fixed in the receiving groove of the chain mechanism mounting seat 63, and a rack 611 is fixedly installed on the hydraulic rod of the second hydraulic cylinder 612. The rotating shaft on which the driving sprocket 600 is installed extends downward and is inserted into the receiving groove of the chain mechanism mounting seat 63, and a gear is installed on the rotating shaft. 610, when the gear 610 is meshed with the rack 611, and the second hydraulic cylinder 612 drives the rack 611 to reciprocate in a straight line direction (as shown by the AA arrow in the figure), the rack 611 drives the gear 610 to rotate and then drives the driving sprocket 600 to rotate (as shown by the BB arrow in the figure), so that the sprocket drive mechanism can drive the rear drive wheel 4 to rotate (as shown by the CC arrow in the figure), thereby changing the travel direction of the rear drive wheel 4, so that the speedboat can move in any direction on land.

[0095] Further, contact switches 613 are installed at both ends of the linear motion stroke of the rack 611 to limit the motion range of the rack, thereby limiting the rotation angle of the rear drive wheel. Further, in the present application, the rear drive wheel lifting drive mechanism and the rear drive wheel rotation drive mechanism are installed in the boat body pipe frame for easy installation.

[0096] Furthermore, the front driving wheel and the rear driving wheel are hydraulic motor driven wheels, and a propeller 7 is installed at the rear part of the speedboat body. A hydraulically driven impeller 70 is provided at the lower end of the propeller 7. The rotation of the impeller 70 can drive the speedboat to move on the water. At the same time, the propeller can also drive the hydraulic motors on the front and rear driving wheels to rotate, and then the hydraulic motor drives the front and rear driving wheels to rotate, thereby realizing the movement of the speedboat on land.

[0097] The working process of the airdroppable amphibious assault boat disclosed in the present invention is as follows: 1. When the assault boat is moving on water, the front driving wheel lifting drive mechanism and the rear driving wheel lifting drive mechanism respectively drive the front driving wheel and the rear driving wheel to rise upward, so that the front and rear driving wheels are above the water surface. At this time, the propeller drives the impeller to rotate, and then the impeller drives the assault boat to travel on the water surface; 2. When the assault boat is traveling on land, the front driving wheel lifting drive mechanism and the rear driving wheel lifting drive mechanism respectively drive the front driving wheel and the rear driving wheel to descend downward, so that the front and rear driving wheels are in contact with the ground. At this time, the propeller drives the hydraulic motors of the front and rear driving wheels to rotate, and then the hydraulic motor drives the front and rear driving wheels to rotate, so that the assault boat can travel on land; 3. When the assault boat needs to turn or change the travel mode when traveling on land, the rear driving wheel rotation drive mechanism drives the rear driving wheel to rotate, so as to change the travel direction or travel mode of the assault boat (from traveling in the direction of the bow to a direction perpendicular to the bow, that is, lateral movement).

[0098] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An airdroppable amphibious assault boat, characterized in that: include, Assault boat hull; A front driving wheel installed at the bow of the speedboat; A front driving wheel lifting drive mechanism installed at the front of the speedboat body for driving the front driving wheel to lift; A rear drive wheel installed at the tail of the speedboat; A rear drive wheel lifting drive mechanism installed at the tail of the speedboat body for driving the rear drive wheel to lift; A rear drive wheel rotation drive mechanism installed at the rear of the speedboat body for driving the rear drive wheel to rotate; as well as, A propeller installed on the hull of the speedboat and used to drive the hull of the speedboat to move; The rear drive wheel lifting and driving mechanism comprises a fixing plate, a mounting base, a card holder, a power device, a positioning tooth and a gear shifting mechanism; The fixing plate is vertically fixed to the tail of the speedboat body; The card holder is mounted on the fixed plate, and the card holder can move up and down along the vertical direction on the fixed plate; The mounting base is fixedly mounted at the lower part of the card support and the mounting base is arranged horizontally, and the power device for driving the card support to move downward is installed between the card support and the fixing plate; A toggle protrusion and a limit protrusion are sequentially arranged on one side of the card holder from top to bottom, a first reset wedge is arranged on the upper part of the limit protrusion, a limit clamping surface is arranged on the lower part of the limit protrusion, and a toggle stop surface is arranged on the lower part of the toggle protrusion; The positioning tooth is hinged on one side of the fixing plate provided with a limiting protrusion, and the positioning tooth is provided with a limiting block and a triggering tooth; The limit block is provided with a second reset wedge, and when the bracket moves upward relative to the fixed plate, the first reset wedge and the second reset wedge contact each other and drive the positioning tooth to rotate, and when the limit protrusion slides over the limit block, the limit clamping surface is clamped with the upper end surface of the limit block; The gear shifter mechanism comprises a gear shifter and a gear shifter driving motor for driving the gear shifter to rotate; The gear shifter comprises a triggering gear shifting tooth and a protruding block shifting tooth arranged along the axial direction of the gear shifter rod body, and the triggering gear shifting tooth and the protruding block shifting tooth are vertically arranged along the circumferential direction of the gear shifter rod body; The trigger tooth shifting teeth and the trigger tooth are in the same plane, the convex block shifting teeth and the toggling convex block are in the same plane, and when the gear shifting device driving motor drives the gear shifting device to rotate, the gear shifting device can sequentially realize that the trigger tooth shifting teeth and the trigger tooth act to drive the positioning tooth to rotate and the convex block shifting teeth and the toggling stop surface of the toggling convex block act to drive the card holder to move upward in the vertical direction; The front driving wheels and the rear driving wheels are hydraulic motor driven wheels.

2. The airdroppable amphibious assault boat according to claim 1, characterized in that: The rear drive wheel lifting and lowering drive mechanism also includes an elastic reset mechanism, which includes multiple groups of springs. The multiple groups of springs are arranged between the mounting base and the body of the speedboat. When the mounting base is driven to descend by the bracket, the mounting base compresses the springs. When the mounting base is driven to rise by the bracket, the restoring force of the springs drives the mounting base to rise.

3. The airdroppable amphibious assault boat according to claim 1 or 2, characterized in that: The rear drive wheel rotation driving mechanism comprises a sprocket mechanism, a sprocket drive mechanism, a rear drive wheel support arm and a chain mechanism mounting seat; The chain mechanism mounting seat is mounted on the mounting base, and the rear driving wheel support arm is fixedly mounted on one end of the chain mechanism mounting seat extending out of the speedboat body; A rear drive wheel fork frame is installed on the rear drive wheel support arm, and the rear drive wheel fork frame is installed on the rear drive wheel; The sprocket mechanism is installed on the chain mechanism mounting seat, and the sprocket mechanism includes a driving sprocket, a driven sprocket and a chain. The driven sprocket is installed on the chain mechanism mounting seat and is provided with one end of the rear drive wheel support arm, and the driven sprocket is connected to the rear drive wheel fork frame, and the driving sprocket is arranged at the other end of the chain mechanism mounting seat, and the driving sprocket and the driven sprocket are connected through the chain; The sprocket drive mechanism is arranged at one end close to the driving sprocket, and the sprocket drive mechanism can drive the driving sprocket to rotate, and then the sprocket mechanism and the rear driving wheel fork frame drive the rear driving wheel to turn.

4. The airdroppable amphibious assault boat according to claim 3, characterized in that: The sprocket drive mechanism includes a gear, a rack and a second hydraulic cylinder; The gear is coaxially fixedly connected with the driving sprocket, the second hydraulic cylinder is installed on the mounting base, the rack is fixedly installed on the hydraulic rod of the second hydraulic cylinder, the gear is meshed with the rack, and when the second hydraulic cylinder drives the rack to reciprocate in a linear direction, the rack drives the gear to rotate and then drives the driving sprocket to rotate.

5. The airdroppable amphibious assault boat according to claim 4, characterized in that: Contact switches are installed at both ends of the rack's linear motion stroke.

6. The airdroppable amphibious assault boat according to claim 1, characterized in that: The front driving wheel lifting drive mechanism includes a front driving wheel support arm and a third hydraulic cylinder, one end of the front driving wheel support arm is hinged to the bow of the speedboat body, and the other end is equipped with the front driving wheel, one end of the third hydraulic cylinder is hinged to the bow of the speedboat body, and the other end is hinged to the front driving wheel support arm, and the extension and retraction of the piston rod of the third hydraulic cylinder can drive the front driving wheel support arm to swing in the vertical direction, thereby realizing the lifting and lowering of the front driving wheel.

7. The airdroppable amphibious assault boat according to claim 1, characterized in that: The assault boat hull comprises a deck, ribs, a keel plate and a hull pipe frame; The deck, ribs and keel plates are installed on the boat body tube frame, and the deck, ribs and keel plates are mutually engaged through a slot structure; A watertight cavity separated from each other is formed between the deck, the rib plate and the keel plate.

8. The airdroppable amphibious assault boat according to claim 1, characterized in that: The body of the speedboat is made of high-density polyethylene.

Images