JP3094479U - High speed boat - Google Patents

Abstract

(57) [Problem] To provide a high-speed boat capable of high-speed and stable navigation by providing a plurality of water pipes at the bottom and providing floating plates on both sides so as to be tiltable. SOLUTION: A plurality of parallel curved water pipes 7 extending from a bow 8 to a stern 9 are provided under a chassis 2 of a high-speed boat 1 provided with a floating plate 40 on both sides capable of tilt control. A screw 13 is provided in the water pipe 7, water is sucked from the bow 8 into each water pipe 7 as a water flow by the suction force of the screw 13, and this water flow is jetted out from the jet nozzle 10 of the stern 9 and propelled. Drive.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  The present invention relates to a high-speed boat, and in particular, it is provided with a plurality of water pipes and the water pipes are installed in the respective water pipes. By installing a liu, water can be drawn from the bow to each water pipe by the suction force of this screw. Intake (seawater, lake water, etc.), discharge this as a jet stream at the stern, and drive it at high speed. It concerns moving speed boats.

[0002]

[Prior art]

  Conventionally, a water jet that sucks water with an impeller and jets the water backward to propel it. Toe propulsion boats are known (for example, refer to Patent Document 1).

[0003]

[Patent Document 1]            JP, 2001-26990, A

[0004]

[Problems to be solved by the device]

  A conventional water jet ship uses a water jet near the stern as in the above-mentioned known example. There are many types that suck in from the bottom of the ship and eject at the stern. There were many small boats for leisure use. And the known water jet Is equipped with an impeller in one waterway, and is recommended as a small boat or small boat. It was the only one that was equipped with advancement.

[0005]   The present invention jets out a water flow applicable not only to small boats but also to medium-sized boats and large boats. The purpose is to realize a high-speed boat driven by propulsion. The title. (1) Plural extending from the bow to the stern, applicable to small, medium and large high speed boats To realize a high-speed water jet-driven high-speed boat having a water pipe with a screw (water channel).

[0006] (2) Tilt control levitation plates are installed on both sides of the high-speed boat to change the speed and direction. The floating force of the high-speed boat can be adjusted according to the row condition, so that it is smooth and stable. It enables navigation.

[0007] (3) The jet nozzles protruding from the stern of a plurality of water pipes are made movable from the base end, Like a fish's caudal fin, it adapts to changes in direction and reduces the fluid resistance of water. This improves power efficiency and stability of high-speed boats.

[0008] (4) A structure in which the driving of the screws in the plurality of water channels can be independently controlled by a clutch. As a result, make sure to make a small turn when changing routes while navigating or changing directions within the port. To

[0009]

[Means for Solving the Problems]

  SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a chassis for a high-speed boat. A plurality of curved water pipes extending from the bow to the stern and parallel to each other are installed in the A screw is installed in the pipe and the suction force of this screw causes the bow or stern Water is sucked into each water pipe as a water flow, and the water flow is jetted from the stern or the bow. Provided is a high-speed boat characterized by propelling and driving a hull.

[0010]   A pair of left and right levitation plates are provided on the left and right sides of the high-speed boat so that tilting can be controlled. It is characterized by

[0011]   At the rear end of the water pipe, a jet nozzle protruding rearward from the stern is formed. The jet nozzle has a bellows portion formed at its base end, and the bellows portion provides flexibility. It is characterized by

[0012]   On the upper surface and / or the lower surface of the jet nozzle, extending in the same direction as the axis of the nozzle, In addition, a vertical fin plate is integrally or separately provided.

[0013]   The above screws can be driven by the engine through the drive force distribution gear mechanism. It is connected to each screw and the clutch provided for each screw It is characterized in that its operation is independently controlled.

[0014]

[Embodiment of device]

  BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a high-speed boat according to the present invention will be described below with reference to the drawings based on examples. explain.

[0015]   The high-speed boat according to the present invention has a bottom portion of a chassis constituting the frame and platform of the high-speed boat. A plurality of water pipes parallel to each other are provided in the front-back direction (from the bow to the stern direction) on the lower surface of the A screw is installed in each water pipe, and the suction force of this screw causes the bow Intake water (seawater, lake water, etc.) into each water pipe from It is characterized by being ejected and capable of being driven and driven at high speed.

[0016] (Example)   An embodiment of a high-speed boat according to the present invention will be described with reference to FIGS. High-speed boat according to the present invention Are small boats, medium boats or large boats of various scales and various uses (tourism It can be used for recreation, leisure, security, etc.) The explanation is given assuming a medium-sized high-speed boat sailing for the purpose of light.

[0017]   FIG. 1 is an overall perspective view of the appearance of this high-speed boat 1, and FIG. View from above the chassis to illustrate the drive force distribution gear mechanism for rotating Fig. 3 (a) is a perspective view (a view of the deck above the chassis and the guest room omitted). Screw drive mechanism (engine, drive force distribution gear) for rotating the screw Mechanism, clutch, etc.) and the related arrangement of the oil pump, steering mechanism, etc. FIG. 4 is a plan view seen from the upper side of the chassis, and FIG. 4 is a view seen from the side of the high-speed boat 1. 5 is a plan view of the high-speed boat 1 as seen from below. FIG. FIG. 6 is a block diagram showing the control system of this embodiment.

[0018]   As shown in FIGS. 1 to 3, this high-speed boat 1 constitutes its basic frame and platform. It has a chassis 2. The chassis 2 includes left and right bow side walls 3, a main body side wall 4, It is composed of a stern side wall 5 and a bottom portion 6.

[0019]   Above the bottom portion 6, an engine for rotating the screw 13 will be described in detail later. 26, driving force distribution gear mechanism 30, clutch (main clutch 28, screw drive) Drive mechanism 14 including an oil clutch 32), an oil pump 35, and a levitation A floating plate drive mechanism 37 including an oil motor for controlling the inclination of the plate 40; A steering mechanism 36 and the like are provided.

[0020]   A deck (floor plate) is arranged above the chassis 2, and The outer wall 15 and the ceiling wall 16 are provided, and the cabin of the high-speed boat 1 (the cab of the high-speed boat and the passengers Boat room used for rooms, etc.) is formed. On the front surface of the outer wall 15, a wave preventing portion 17 is formed. Is made. A window 18 is provided on the outer wall 15.

[0021]   As shown in FIGS. 1 to 3, on the lower surface of the bottom portion 6 of the chassis 2 of the high-speed boat 1, from the bow 8 Towards the stern 9, that is, to the front-back direction of the high-speed boat 1, a plurality of parallel (this embodiment Water pipes 7 (10 in the example) are arranged in parallel in the lateral direction of the high-speed boat 1. The plurality of water pipes 7 are shown on the bottom surface of the bottom portion 6 of the chassis 2 in FIGS. 3 (b) and 3 (c). It is supported so that it is wrapped from below by a mounting plate 48 formed of a steel plate, etc. It is mounted by fixing it with fasteners (not shown) such as bolts and nuts. It Water (seawater, etc.) enters between the water pipes 7, 7 that are adjacent to each other, and If the bearing / seal 21 of the chassis 2 is incomplete, it may get inside the boat. I will end up. Therefore, as shown in FIGS. 3 (b) and 3 (c), the water pipes 7 adjacent to each other, A seal material 49 is arranged between the seven.

[0022]   The water pipe 7 is formed in a generally curved shape (in a bow shape) from the bow 8 to the stern 9. In the stern 9, the stern 9 should be projected slightly downward toward the rear. It is provided. The cross section of the water pipe 7 allows the screw 13 to rotate on its inner circumference. It has a circular shape, but the entrance and exit parts of the bow 8 and the stern 9 at the front and rear ends Minutes is a rectangle (rectangle). The water pipe 7 is lightweight such as stainless steel and aluminum alloy Is a metal material with high toughness and excellent water resistance and corrosion resistance, or fiber-reinforced synthetic resin It is formed of material.

[0023]   The portion of the water pipe 7 protruding from the stern 9 is formed as the jet nozzle 10. ing. The base end 11 of the jet nozzle 10 is processed into a bellows shape, The nozzle 10 is normally located on the axial center of the water pipe 7, but is subject to external force (force due to water or the like). ) Is added to bend (bend) is configured. In short, the gush of the water pipe 7 The nozzle 10 is provided with appropriate flexibility (flexible property) by the bellows-shaped base end portion 11. Has been done.

[0024]   As a result, when the high-speed boat 1 is navigating, the direction of travel is bent or turned by steering. Even if it does, the spray nozzles of the plurality of water pipes 7 should be arranged so as to smoothly follow the traveling direction. Each of the 10 turns independently (the car following the train running on the curve becomes the lead car) On the other hand, an image that bends appropriately. ) Is formed. Therefore, the Further, the fluid resistance of the jet nozzle 10 with respect to water (sea water, lake water, etc.) becomes smaller, Efficient propulsion is performed, and the fuel efficiency of the engine 26 is reduced.

[0025]   4D and 4E show another embodiment of the ejection nozzle 10. This gush On the upper surface and / or the lower surface of the nozzle 10 (the upper surface and the lower surface in the figure), a jet nozzle A fin plate 12 extending in the same direction as the axial center of the le 10 is integrally or separately provided. Is.

[0026]   With this structure, the fin plate 12 is positively oriented like a fish's caudal fin. It does not have a function to convert, but when changing the course during navigation, as described below, the ejection nozzle When 10 bends along the direction change, fin plate 12 also advances in the direction along this. , Function to change direction smoothly and stably. In addition, the fin plate 12 By interlocking with the steering mechanism described later, the course change operation of the high-speed boat by steering can be performed. Be more certain.

[0027]   As shown in FIGS. 2 and 3 (a), the screws 13 are installed in the plurality of water pipes 7. It is placed. The screw 13 provided in the water pipe 7 is It is rotationally driven by the view drive mechanism 14.

[0028]   The screw 13 provided in each water pipe 7 is a rear end portion of the screw drive shaft 22. Is attached to. The tip of the screw drive shaft 22 is attached to the side wall of the bow of the chassis 2. It is rotatably mounted on the inner surface of the bearing 3 by a bearing 20. Screw drive shaft 2 The rear part 2 extends through the bottom part 6 of the chassis 2 and extends into the water pipe 7. screw The portion of the drive shaft 22 that penetrates the bottom portion 6 is made watertight by the seal 21 that also serves as a bearing. It is rotatably supported.

[0029]   The output shaft 29 of the engine 26 installed on the upper surface of the bottom portion 6 of the chassis 2 is Drives the drive force distribution gear mechanism 30 via the clutch 28. It is connected to the gear 32. The engine 26 or the clutch 28 is not shown A forward / reverse rotation gear mechanism is attached, and the configuration is such that forward / reverse rotation can be selected. ing.

[0030]   As shown in FIGS. 2 and 3, the driving force distribution gear mechanism 30 includes the output shaft 2 of the engine 26. The driving force output from the screw 9 is applied to the screw 1 of each water pipe 7 via the clutch 28. It is a mechanism for distributing and transmitting to three. The driving force distribution gear mechanism 30 includes the output shaft 2 Drive gear 31 provided at the tip of 9 and front and rear attached to each screw drive shaft 22 Input gear 23, output gear 24 (screw drive shafts 22 at the left and right ends in FIG. 3A) Regarding the input gear 23 only) and the intermediate gear 50 (in FIG. 2, the intermediate teeth on the lower side). The car 50 is drawn in imaginary lines, and the intermediate gear on the upper side is complicated, so pull it forward. It is shown with a bare imaginary line. ) And.

[0031]   As shown in FIG. 2 and FIG. 3A, the drive gear 31 is located on the left and right of the output shaft 29. Meshing with the respective input gears 23 of the screw drive shaft 22. Also, the screw -The output gear 24 of the drive shaft 22 is located outside the screw drive shaft 22. It meshes with the input gear 23 of the clew drive shaft 22 via an intermediate gear 50. Servant Therefore, the rotational force of the engine 35 is input from the drive gear 31 to the screw drive shaft 22. Screw drive further outside via gear 23, intermediate gear 50 and output gear 24 It is sequentially transmitted to the shaft 22.

[0032]   According to such a driving force distribution gear mechanism 30, the high speed boat 1 is arranged in parallel in the lateral width direction. The plurality of screw drive shafts 22 to 13 rotate in one direction. That is, Of the input gear 23 and the output gear 24 of the two screw drive shafts 22 adjacent to each other Since the intermediate gear 50 is provided in between, the rotation direction of the input gear 23 and the rotation of the output gear 24 Since the directions are the same, all the screw drive shafts 22 are driven to rotate in one direction. The full output is used to propel the high speed boat in one direction (forward or backward).

[0033]   In this embodiment, the output gear 24 of the screw drive shaft 22 (left and right in FIG. 3A) For the screw drive shaft 22 at the end, a screw is installed between the input gear 23) and the seal 21. A clutch 32 for Liu is provided, and this screw clutch 32 is selectively connected. By selectively rotating the screw 13 by changing the direction, It is also possible to have a configuration in which the output can be adjusted when the steering is delicate. More If a normal / reverse rotation conversion mechanism is attached to the screw clutch 32 of The drive shaft 22 to the screw 13 can be selectively rotated in the forward or reverse direction, and is especially fine in the port. It is effective for strange steering. Of course, there is no screw clutch 32 It goes without saying that the configuration may be omitted.

[0034]   If a transmission mechanism (not shown) is connected to the output shaft 29 of the engine 26, the It is possible to accelerate and decelerate. A speed change mechanism may be provided on each screw drive shaft 22. Yes. As a result, in addition to the acceleration and deceleration of the engine 26 itself, Multiple screws 13 can be rotated at independent speeds to speed up, decelerate, It is also possible to stop or reverse.

[0035]   Further, an oil pump 35 is connected to the engine 26. This oil port The pump 35 includes an oil pipe for the steering mechanism 36 for operating the direction snake 38 and the floating plate drive mechanism 37. The steering mechanism 36 and the floating plate drive mechanism 37 are connected to each other by a hydraulic pressure operation 42. It becomes the oil pressure generation source for.

[0036]   As shown in FIGS. 1, 4 and 5, below the bottom 6 of the chassis 2 The direction vertical stabilizer 25 is vertically installed so as to extend in the front-back direction along the center line 19 of the There is. This directional vertical stabilizer 25 rotates when the high speed boat changes direction while traveling. It is intended to prevent instability such as falling off, and strength is necessary, but water resistance In order to reduce the number, it is made of a thin steel material or a plate material such as resin. This direction vertical stabilizer 25 , Two on either side of the centerline 19 for mounting on the bottom 6 of the chassis 2. Secured to the bottom 6 of the chassis 2 via a mounting vertical plate 27 extending between the water pipes Has been done. This direction vertical stabilizer 25 reduces the rolling of the high speed boat, It has a function to maintain a stable state.

[0037]   At the rear end of the vertical stabilizer 25 and below the jet nozzle 10 of the water pipe 7, A snake 38 is rotatably mounted. The base end of the direction snake 38 rotates about the axis. The steering shaft 39 is mounted on the bottom portion 6 of the chassis 2. The direction steering wheel 38 is steered by being rotationally driven by the arranged rudder steering mechanism 36. . In this steering mechanism 36, a hydraulic motor and hydraulic pressure (not shown) from the oil pump 35 are used. A hydraulic drive device such as a piston is used to rotate the steering shaft 39.

[0038]   As shown in FIGS. 1 to 4, a pair of left and right floating plates 40 are provided on both left and right outer sides of the high-speed boat 1. Is attached. The left and right levitation plates 40 are attached to the tips of the levitation plate drive shafts 41, respectively. It is attached and can be tilted by the rotation of the levitation plate drive shaft 41. Levitation The moving shaft 41 is driven by the floating plate driving mechanism 37 provided on the left and right sides of the bottom portion 6 of the chassis 2. Is driven and rotated. This specific structure will be described.

[0039]   Pulleys formed watertightly on the left and right body side walls 4 of the chassis 2 of the high-speed boat 1, respectively. -The top of the case 33 is fixed. The lower part of this pulley case 33 is a water pipe 7 to the side or even below. With the upper part of this pulley case 33 An output shaft 44 and a levitation plate drive shaft 41 of the levitation plate drive mechanism are provided at the lower part of the chassis 2 and With the bearings 34 and 45 attached to the pulley case 33, which also function as watertight seals. It is rotatably attached.

[0040]   A pulley 46 with a gear is fixed to each of the output shaft 44 and the levitation plate drive shaft 41. And a transmission chain 47 is attached between these pulleys 46, 46. There is. The base end side of the output shaft 44 is watertightly supported by the bearing 34, and It extends inward and is rotatably connected to the levitation plate drive mechanism 37.

[0041]   The levitation plate drive mechanism 37 is composed of a hydraulic motor (not shown) and a reduction gear (not shown). Upon receiving the hydraulic pressure from the ill pump 35, the hydraulic motor rotates, and this rotation power is used to reduce the speed. The output shaft 44 can be rotated via the vehicle. This rotation of the output shaft 44 causes It is transmitted to the levitation plate drive shaft 41 via the pulleys 46, 46 and the transmission chain 47. As a result, the levitation plate 40 is tilted about the levitation plate drive shaft 41.

[0042]   The levitation plate 40 basically imparts levitation force (buoyancy) to the high-speed boat 1 during navigation, It enables smooth navigation, and its inclination angle is related to the navigation speed. Is operated and adjusted so that the optimum levitation force is obtained. And are preferred.

[0043]   A control device 43 is provided in a driving operation room (not shown) of the high-speed boat 1. Figure As shown in FIG. 6, the control device 43 includes an engine 26, a main clutch 28, and a screw. Of the vehicle clutch 32, the oil pump 35, the steering mechanism 36, and the floating plate drive mechanism 37 They are electrically connected to each other by signal lines or wirelessly. Functions to control the mechanism. The oil pump 35 also includes a steering mechanism 36 and a floating mechanism. An oil pipe 42 is connected to each of the upper plate drive mechanisms 37.

[0044]   A driver driving and navigating this high-speed boat 1 decides to operate a control panel for driving. The control device 43 is controlled to control the engine 26, the main clutch 28, and the screw. The vehicle clutch 32, the oil pump 35, the steering mechanism 36, and the floating plate drive mechanism 37. Each can be controlled and operated.

[0045] (Action)   At the time of navigation, the driver operates the operation panel to control the control device 43 to control the engine 2 6 is started and the main clutch 28 is engaged, the rotational force of the engine 26 changes its output shaft. 29 is transmitted to the driving force distribution gear mechanism 30, and the plurality of screw drive shafts 22 are connected to each other. Rotate in the direction. Each of the screw drive shafts 22 has a clutch 32 which is engaged or disengaged. Since it is a structure that can be selectively rotated, a plurality of screws 13 of the high-speed boat 1 can be selectively Thus, the output of the high-speed boat 1 as a whole and its width direction can be finely adjusted.

[0046]   When moving the high-speed boat 1 forward (during normal navigation), the engine 26 or If the forward / reverse rotation mechanism attached to the latch 28 is selected for normal rotation, the high-speed boat 1 The screw drive shaft 22 to the screw 13 rotate in the forward direction. And Water is drawn into the water pipe 7 from the opening of the water pipe 7 on the bow 8 side and flows through the water pipe 7. A water flow is generated, and this water flow is ejected from the ejection nozzle 10 of the stern 9. This gush The high-speed boat 1 can be driven and moved forward by the jetting force generated by.

[0047]   When the high speed boat 1 is retracted, it is attached to the engine 26 or the clutch 28 described above. If the forward / reverse rotation mechanism is selected for reverse rotation, the high-speed boat 1 will move backwards. The clew drive shaft 22 to the screw 13 rotate. And the stern 9 of the water pipe 7 Water should be sucked in from the jet nozzle 10 and discharged from the opening of the bow 8. Yes.

[0048]   Further, the plurality of screw drive shaft clutches 32 are selectively controlled independently of each other. However, it is possible to independently rotate or stop each of the plurality of screws 13. Wear. This makes it possible to make turns while traveling, change routes, and make detailed steering operations in the port. It is possible to make good use of small turns when changing the direction when berthing, turning, etc. .

[0049]   If the driver wants to increase the levitation force with the levitation plate 40, the operator can control the levitation force with the operation panel. 43 to control the hydraulic motor of the levitation plate drive mechanism 37 through the oil pipe 42. The hydraulic pressure from the pump 35 is sent, the hydraulic motor is rotated, and output via the reduction gear. The shaft 44, the chain 47, and the levitation plate drive shaft 41 are made rotatable, and the tip of the levitation plate 40 is fixed. Tilt slightly upward.

[0050]   The operation of the levitation plate drive mechanism 37 is controlled so that the left and right sides can be controlled independently. When changing the direction of travel or turning, the levitation force is determined by each of the left and right levitation plates 40. Fine controllability provides high speed boat stability when changing direction and turning. It

[0051]   Further, the operation of the levitation plate drive mechanism 37 gives an optimum levitation force in relation to the navigation speed. So that it is automatically controlled by the control device 43 in association with the navigation speed measuring device, The inclination angle of the levitation plate 40 may be automatically operated.

[0052]   The embodiment of the high-speed boat according to the present invention has been described above based on the examples. Is not particularly limited to such an embodiment, but the scope of claims for utility model It goes without saying that there are various embodiments within the scope of the technical matters described in 1.

[0053]

[Effect of device]

  Since the high-speed boat according to the present invention has the structure described above, the following effects can be obtained. Occurs. (1) The present invention has a plurality of water pipes with screws extending from the bow to the stern Since a water jet drive device can be installed to increase the propulsion force, Therefore, it is also applicable to medium-sized boats and large boats.

[0054] (2) Tilt control levitation plates are installed on both sides of the high-speed boat to allow different navigation speeds and turning. The floating force of the high-speed boat can be adjusted according to the sailing condition such as the change of direction As a result, smooth and stable navigation is possible. Moreover, this levitation plate is It can be easily controlled by driving.

[0055] (3) Each operation or control such as rotation or stop of screws in a plurality of water pipes is performed individually. Since it is configured so that it can stand upright, it is possible to change the course and turn while sailing, It is possible to operate with a very small turn when turning.

[0056] (4) The base end of the jet nozzle projecting from the stern of a plurality of water pipes has a bellows shape, Since it is movable from the base end, it can adapt to changing directions like a fish's caudal fin, By reducing the fluid resistance of water, power efficiency is improved and the safety of high-speed boats is reduced. Qualitativeness can be improved.

[0057] (5) Because the propulsion device for high-speed boats is simply configured to have a screw inside the water pipe. , Especially because it has a simple structure, not a complicated structure such as a jet injection device. It can be applied to various high-speed boats regardless of the purpose.

[Brief description of drawings]

FIG. 1 is a perspective view showing the external appearance of an embodiment of a high-speed boat according to the present invention.

FIG. 2 is a perspective view illustrating a screw drive mechanism.

FIG. 3A is a plan view illustrating a screw drive mechanism, and FIGS. 3B and 3C are diagrams illustrating an arrangement structure of a water pipe.

FIG. 4A is a side view of an embodiment of a high-speed boat according to the present invention, FIG. 4B is a view showing a configuration inside a pulley case, and FIG. And
(D), (e) is a figure showing the front and the side explaining another mode of an ejection nozzle.

FIG. 5 is a plan view of the high-speed boat according to the present invention as seen from below.

FIG. 6 is a block diagram showing a control system of the embodiment.

[Explanation of symbols]

1 high-speed boat 2 chassis 3 Bow side wall 4 Main body side wall 5 Stern side wall 6 Bottom of chassis 7 water pipe 8 bow 9 stern 10 jet nozzle 11 Base end of jet nozzle 12 Fin plate suspended from the jet nozzle 13 screws 14 Screw drive mechanism 15 Outer wall (outer wall forming the cabin of a high-speed boat) 16 ceiling 17 Wave protection 18 windows 19 center line 20 bearings 21 Bearing bearing seal 22 screw drive shaft 23 Screw drive shaft input gear 24 Screw drive shaft output gear 25 direction vertical stabilizer 26 engine Vertical plate for attaching 27-direction vertical stabilizer 28 Main clutch 29 Engine output shaft 30 Drive force distribution gear mechanism 31 Drive gear for output shaft of engine 32 Screw drive shaft clutch 33 pulley case 34 Bearings that also serve as seals 35 oil pump 36 Steering mechanism 37 Floating plate drive mechanism 38-way snake 39 Steering axis 40 floating plate 41 Floating plate drive shaft 42 oil pipe 43 Control device 44 Output shaft of levitation plate drive mechanism 45 Bearings that also serve as seals 46 pulley with gears 47 transmission chain 48 mounting plate 49 Seal material 50 intermediate gear

Claims (5)

[Scope of utility model registration request] 1. A plurality of curved water pipes extending from the bow to the stern and parallel to each other are provided at the lower part of a chassis constituting a frame of a high-speed boat, and screws are provided in the respective water pipes.
A high-speed boat characterized by sucking water as a water flow into the respective water pipes from the bow or stern by the suction force of the screw, and jetting the water flow from the stern or the bow to drive the hull for propulsion. 2. A high-speed boat according to claim 1, wherein a pair of left and right levitation plates are provided on the left and right sides of the high-speed boat so that tilting control is possible. 3. A jet nozzle projecting rearward from the stern is formed at the rear end of the water pipe, and the jet nozzle has a bellows portion formed at the base end thereof, and the bellows portion is flexible. The high-speed boat according to claim 1 or 2, wherein the high-speed boat is provided with a property. 4. The fin plate, which extends in the same direction as the axis of the nozzle and is vertical, is integrally or separately provided on the upper surface and / or the lower surface of the jet nozzle. The high-speed boat described in 2 or 3. 5. The plurality of screws are connected to be driven by an engine via a driving force distribution gear mechanism, and the operation thereof is independently controlled by a clutch provided corresponding to each screw. The high-speed boat according to claim 1, 2, 3, or 4, characterized in that