JP2002362488A - Electrically operated propulsive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve the operating performance of a ship. SOLUTION: The propulsive device 12 comprises a motor 14 mounted on a hull 3, a battery for supplying electric power to the motor 14, jetting means 20 supported at the rear part of the hull 3 for jetting a water 2 to the rear side of the hull 3 in linkage with the motor 14, and a riding seat 38 supported on the midway in the longitudinal direction of the hull 3. The battery 16 is arranged so that its rear end is located on the rear side of the front end of a seated face 41 of the seat 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting water toward the rear of a hull by driving force of an electric motor.
The present invention relates to an electric propulsion device for a small boat in which the hull is propelled forward.

[0002]

2. Description of the Related Art A conventional electric propulsion device for a small boat is disclosed in Japanese Patent Application Laid-Open No. 5-85471.

[0003] According to the above publication, the marine vessel has an electric motor mounted on the hull, a battery capable of supplying electric power to the electric motor, and a hull supported at the rear of the hull and interlocked with the electric motor. And a saddle-ride type seat that is supported at an intermediate portion of the hull in the front-rear direction.

The jet injection means is provided at a rear portion of the hull, extends in the front-rear direction, and communicates a lower portion of the hull with a rear portion of the hull, and is disposed substantially on the hole center of the water passage. A bearing case supported by the hull; and an impeller supported by the bearing case so as to be rotatable about an axis located substantially on the hole center.

When the electric motor is driven and the impeller of the jet injection means is rotated in conjunction with the electric motor, water located below the hull is sucked into the water passage.
The water sucked into the water passage is jetted toward the rear of the hull, and the boat is propelled forward on the water surface by the reaction force of the jet.

Here, when the ship is propelled forward, the hull takes a reaction force from the surface of the water and assumes a forward-upward posture. It is possible to smoothly glide on the water surface, which is preferable in terms of the driving performance of the ship.

[0007]

However, in the above prior art, a heavy battery is disposed in front of the front end of the seating surface of the seat, that is, a rider seated on the seating surface of the seat. Since the heavy object is disposed on the front side, the overall center of gravity of the ship is closer to the front, and therefore, when the ship is propelled, it may be difficult to make the hull in the forward-upward posture at a desired angle. Therefore, the above-described conventional technique is not preferable in terms of the kinetic performance of the ship.

On the other hand, the electric motor tends to be heated to a high temperature due to its driving, which is not preferable in terms of life. Therefore, it is desired to cool the electric motor.
However, in the above-described conventional technique, the electric motor is housed in a closed room inside the hull, so that it is not easy to cool the electric motor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and is intended to further improve the operation performance of a ship, and to provide a motor having a simple structure with a simple configuration of an electric motor serving as a propulsion drive source of the ship. It is an object of the present invention to make it possible to cool the steel.

[0010]

An electric propulsion device for a small boat according to the present invention for solving the above problems is as follows.

As shown in the drawings, a motor 14 mounted on a hull 3 and a motor 14
And a jet-injecting means 2 supported at the rear of the hull 3 and capable of injecting water 2 toward the rear of the hull 3 in conjunction with the electric motor 14.
0 and a saddle-riding type seat 38 supported at a middle part of the hull 3 in the front-rear direction.

The battery 16 is arranged such that the rear end of the battery 16 is located behind the front end of the seating surface 41 of the seat 38.

As shown in FIGS. 2 to 5, the invention according to a second aspect of the present invention includes a motor 14 mounted on the hull 3, and a rear portion of the hull 3 supported by the rear portion of the hull 3 and interlocked with the motor 14. Jetting means 2 for jetting water 2 toward
0, and the jet injection means 20 is mounted on the hull 3
And a water passage 22 extending in the front-rear direction and extending below the hull 3 and communicating with the rear of the hull 3.
A small boat provided with a bearing case 26 supported by the bearing case 26 and an impeller 29 supported by the bearing case 26 so as to be rotatable about an axis 27 located substantially on the hole 23.

The motor 1 is mounted inside the bearing case 26.
4 and the impeller 29 is connected to the electric motor 14 in an interlocking manner.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment)

FIG. 1 shows a first embodiment.

In the drawing, reference numeral 1 denotes a saddle-riding small boat, in other words, a high-speed gliding small boat, floating on two surfaces of water. The arrow Fr indicates the forward direction of the boat 1 in the propulsion direction.

The hull 3 of the marine vessel 1 has a hull 4 that constitutes a lower part thereof and floats on the water 2 surface, a deck 5 that constitutes an upper part of the hull 3 and is supported by an upper end of the hull 4,
A gunnel 6 that connects the upper end of the hull 4 and the outer edge of the deck 5 to each other, and a chamber 7 inside the hull 3 is divided into a front chamber 8 and a rear chamber 9 and the hull 4 and the deck 5 are connected. And a partition wall 10.

An electric propulsion device 12 mounted on the hull 3 and propelling the hull 3 is provided. The propulsion device 12 includes an electric motor 14 housed in the front chamber 8 of the chamber 7 and supported at the bottom of the hull 4 via a buffer 13.
The electric motor 14 is housed in the front chamber 8 of the chamber 7 and
A battery 16 such as a fuel cell, which is supported on the bottom of the hull 4 via a buffer 15 near the front of the hull 4 and is capable of supplying electric power to the electric motor 14, is housed in the front chamber 8 of the chamber 7, and A controller 1 that is disposed above the battery 14 and the battery 16 and is supported by the hull 3 and receives electric power from the battery 16 to control the motor 14.
7 and an electric wire 18 for connecting the electric motor 14, the battery 16 and the controller 17 to each other.

The propulsion device 12 is supported by a rear portion of the hull 3 and is interlocked with the electric motor 14. The propulsion device 12 sucks the water 2 from below the hull 3 in conjunction with the electric motor 14, and 2 is provided with a jet injecting means 20 for injecting the jet 2 toward the rear of the hull 3.

The jet injection means 20 includes the hull 3
A water pipe 21 is provided at the rear of the vessel 3 and extends in the front-rear direction. The interior of the water pipe 21 is a water passage 22 that communicates a lower rear portion of the hull 3 with the rear of the hull 3.
The water passage 22 also extends in the front-rear direction, and each section in the longitudinal direction has a circular shape. It is open.

The hole 23 at the rear of the water passage 22 extends substantially horizontally in the front-rear direction, and a bearing case 26 is provided substantially on the hole 23 at the rear of the water passage 22. The bearing case 26 extends longitudinally in the front-rear direction and has a circular section at each part in the longitudinal direction.
3 above.

An annular water passage is formed between a rear inner peripheral surface of the water pipe 21 and an outer peripheral surface of the bearing case 26, and this water passage forms a part of the water passage 22. ing. The bearing case 26 is supported by the hull 3 via the flowing water pipe 21 by a plurality of stationary blades 28 extending in the front-rear direction and radially from the bearing case 26.

The jet injection means 20 includes the shaft center 2
An impeller 29 is provided on the bearing case 26 so as to be rotatable about the shaft center 27 and located on the shaft 7. Although not shown in FIG. 1, reference numerals 31 to 34 described below support a pair of front and rear bearings 32, 32 in the inner space 31 of the bearing case 26 on the shaft center 27. The impeller 29 is rotated by the bearings 32 so as to be rotatable about the axis 27.
6, and an impeller body 34 that is disposed near the front of the bearing case 26 and the stationary blade 28, is supported by the front end of the rotating shaft 33, and rotates together with the rotating shaft 33. The rotation shaft 33 is linked to the electric motor 14 by a power transmission shaft 35.

A steering device 36 is provided near the rear of the opening at the rear end of the water passage 22. The steering device 36 is supported on the hull 3 so as to rotate vertically and horizontally. On the other hand, a steering wheel 37 for steering operation is provided at the front of the deck 5 of the hull 3.
Is rotatably supported, and the steering device 36 is connected to the handle 37 by a wire or the like.

Behind the handle 37, a saddle-ride type seat 38 that extends long in the front-rear direction is supported on the upper surface side of the deck 5 of the hull 3 in the front-rear direction. The front portion of the seat 38 is a rider seat 39, the rear portion is a tandem seat 40, and the upper surface is a seating surface 41. The handle 37 can be gripped by a rider seated on the rider seat 39, and an operation lever is attached to a grip on the right side of the handle 37, and the controller 17 is electrically connected to the operation lever.
Also, on the deck 5 near the rear of the handle 37,
A main switch 43 for turning on and off the battery 16 and the controller 17 is attached.

The electric motor 14 is driven, and the impeller 2 of the jet injection means 20 is connected to the electric motor 14 via the power transmission shaft 35.
When the water 9 is rotated in conjunction with the water 9, the water 2 located below the hull 3 is sucked into the water passage 22, while the water 2 sucked into the water passage 22 is directed toward the rear of the hull 3. The marine vessel 1 is propelled forward on the surface of the water 2 by the reaction force of the injection.

When the steering wheel 37 is operated during the propulsion of the boat 1, the steering device 36 is rotated in a predetermined direction and the boat 1 is steered in a desired direction.
Further, by operating the operation lever attached to the handle 37, the rotation speed of the electric motor 14 is controlled via the controller 17, whereby the propulsion speed of the boat 1 is made variable.

In addition, the motor 14, the battery 16,
And the controller 17 are connected to the jet injection unit 20.
Is cooled by a part of the water 2 injected by the water. An opening for maintenance and inspection of the electric motor 14 and the like is formed in the portion of the deck 5 above the electric motor 14, the battery 16, and the controller 17, and the opening can be opened and closed by the seat 38. Is closed.

In the above configuration, the electric motor 14 mounted on the hull 3, a battery 16 capable of supplying power to the electric motor 14, and the electric motor 14 supported by the rear portion of the hull 3 and interlocking with the electric motor 14 In a small boat equipped with a jet jetting means 20 capable of jetting water 2 toward the rear and a saddle-ride type seat 38 supported at a middle part of the hull 3 in the front-rear direction, a seating surface 41 of the seat 38 The rear end of the battery 16 is located behind the front end of the
Battery 16 and electric motor 1 so that
4 is arranged.

For this reason, the overall center of gravity of the boat 1 is closer to the rear as compared with the prior art in which the heavy battery is disposed in front of the front end of the seating surface of the seat. The reaction force received from the surface of the water 2 during the propulsion of the boat 1 makes it easier to bring the hull 3 to a desired forward-upward posture.

Therefore, the operation performance of the boat 1 can be further improved, for example, the boat 1 can smoothly slide on the surface of the water 2.

In the above case, the battery 16 is arranged so that the front end of the battery 16 is located on the front side of the front end of the seating surface 41 of the seat 38, and the ship 1
The overall center of gravity is prevented from being too rearward.

In the above configuration, the center of gravity of the battery 16 and the handle 3
The positions of the center of gravity of the rider holding the gripper 7 in the front-rear direction are substantially matched with each other. In addition, the electric motor 14 is arranged near the rear of the battery 16, and the controller 17 is arranged between the electric motor 14 and the battery 16 in the front-rear direction, near the upper part of the battery 16, and The rider's seat 39 is arranged near the seating surface 41 below.

For this reason, the heavy objects 14, 16 and 17 in the marine vessel 1 including the rider are brought close to each other in the front-rear direction and the vertical direction, and the concentration of the mass is achieved. Is further improved.

As described above, the controller 17
Is disposed above the chamber 7 in the hull 3 above the electric motor 14 and the battery 16.

For this reason, the controller 17 is largely separated upward from the water 2 that may be stored in the lower part of the chamber 7, so that the water is more reliably waterproofed and the electric motor 14
Is prevented, which is beneficial for the operation of the marine vessel 1.

As described above, the controller 17
Is separated by a partition wall 10 from the jet injection means 20 side.

Therefore, water leakage from the jet injection means 20 to the front chamber 8 containing the controller 17 is prevented by the partition wall 10, and in this respect, the controller 17 is more reliably waterproofed.

As shown by a dashed line in FIG. 1, the controller 17
May be supported on the upper surface of the battery 16 or may be supported on the side surface of the battery 16 as described above. Further, the controller 17 may be provided between the electric motor 14 and the battery 16 in the front-rear direction as indicated by C, so that the wiring work of the electric wires 18 can be easily performed.

The following figures show the second and third embodiments. Each of these embodiments has many points in common with the first embodiment in configuration, operation, and effect.
Therefore, these common components are denoted by the same reference numerals in the drawings, and redundant description thereof will be omitted, and different points will be mainly described. Further, the configuration of each part in each of the embodiments may be variously combined in view of the problems and effects of the present invention.

(Second Embodiment)

FIGS. 2 to 4 show a second embodiment.

According to this, the motor 14 is housed on the shaft 27 inside the bearing case 26. In this case, the motor 14 has a housing forming an outer shell integrally formed with the bearing case 26, and an output shaft of the motor 14 is integrally formed with the impeller 29, and the impeller 29 is connected to the motor 14 in an interlocking manner. In addition, the motor 14
Includes a rotor 46 attached to the rotating shaft 33 of the impeller 29 serving as an output shaft thereof, and a stator 47 attached to an inner surface of a housing integrally formed with the bearing case 26. The motor 14, the stator 47, and the battery The electric wire 18 for connecting the controller 16 and the controller 17 to each other is wired through a through hole 48 formed in the stationary blade 28.

According to the above configuration, when the electric motor 14 is driven and the impeller 29 is rotated in conjunction therewith, the boat 1 is propelled in the same manner as described in the above embodiment.

The electric motor 14 tends to generate heat and become high in temperature when driven. Since the electric motor 14 is housed inside a bearing case 26 arranged in the water passage 22, the electric motor 14 The water 2 is cooled by the water 2 flowing through the water passage 22 through the bearing case 26.

Therefore, the electric motor 14 is sufficiently cooled by a simple structure without requiring a special water cooling device, which is beneficial for the life of the electric motor 14.

Further, as described above, since the motor 14 is housed inside the bearing case 26, a long power transmission shaft 35 for connecting the motor 14 and the impeller 29 is unnecessary.

For this reason, first, the number of parts of the propulsion device 12 is reduced, and the configuration is simplified.

Second, as described above, the motor 14
Since these are accommodated inside the bearing case 26, they become compact, and these 14, 26 and the impeller 29
Both are compactly arranged.

Therefore, the battery 16 can be arranged further rearward by utilizing the space for disposing the conventional electric motor 14, so that the overall center of gravity of the boat 1 can be made closer to the rear. For this reason, the hull 3 at the time of propulsion can be more easily set to a desired forward-upward posture, and the driving performance of the marine vessel 1 can be further improved as in the above-described embodiment.

As shown by the dashed line in FIG. 2, the controller 17 may be arranged at the rear of the chamber 7 as indicated by D.

Although the above description is based on the illustrated example, the electric motor 14 may be housed in the internal space 31 of the bearing case 26 separately from the bearing case 26 and the impeller 29.

(Third Embodiment)

FIG. 5 shows a third embodiment.

According to this, the inner peripheral surface of the rear part of the water passage 22 and the bearing case 26 are each a side cross-sectional view (FIG. 5).
Therefore, the flow path of the water 2 at the rear part of the water passage 22 is more smoothly formed.

[0058]

The effects of the present invention are as follows.

According to a first aspect of the present invention, there is provided an electric motor mounted on a hull, a battery capable of supplying electric power to the electric motor,
A jet-injecting unit supported at a rear portion of the hull and capable of injecting water toward the rear of the hull in conjunction with the electric motor; and a saddle-ride type seat supported at an intermediate portion in the front-rear direction of the hull. Small boat,

The battery is arranged such that the rear end of the battery is located behind the front end of the seating surface of the seat.

As a result, the overall center of gravity of the boat is closer to the rear as compared with the prior art in which a heavy battery is disposed in front of the front end of the seating surface of the seat. The hull can be more easily brought into a desired forward-upward posture due to the reaction force received from the water surface during propulsion.

Therefore, the operation performance of the ship can be further improved, for example, the ship can smoothly slide on the water surface.

According to a second aspect of the present invention, there is provided an electric motor mounted on a hull, and a jet injection means supported by a rear portion of the hull and capable of injecting water toward the rear of the hull in conjunction with the electric motor. A water passage which is provided at a rear portion of the hull and extends in the front-rear direction and communicates a lower portion of the hull with the rear of the hull; A small case equipped with a bearing case supported by the bearing case and an impeller supported by the bearing case so as to be rotatable around an axis located substantially on the hole center.

The motor is housed in the bearing case, and the impeller is connected to the motor in an interlocked manner.

For this reason, if the motor is driven and the impeller is rotated in conjunction with the motor, the boat is propelled in the same manner as described in the above embodiment.

The electric motor tends to generate heat and become high in temperature when it is driven. However, since the electric motor is housed in a bearing case arranged in a water passage, the electric motor passes through the bearing case. The water is cooled by vigorously flowing water in the water passage.

Therefore, the electric motor is sufficiently cooled by a simple structure without requiring a special water cooling device, which is beneficial for the life of the electric motor.

As described above, since the motor is housed in the bearing case, a long power transmission shaft for connecting the motor and the impeller is unnecessary.

For this reason, first, the number of parts of the propulsion device is reduced, and the configuration is simplified.

Second, since the motors are accommodated in the bearing case as described above, they become compact, and both these and the impeller are compactly arranged.

Therefore, the battery can be arranged more rearward by utilizing the conventional motor arrangement space, and the overall center of gravity of the boat can be made closer to the rear, so that the propulsion can be made accordingly. The hull at that time can be more easily set to a desired forward-upward posture, and the driving performance of the marine vessel can be further improved as in the first aspect of the present invention.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of an entire side surface of a marine vessel according to a first embodiment.

FIG. 2 is a diagram corresponding to FIG. 1 in a second embodiment.

FIG. 3 is a partially enlarged sectional view of FIG. 2 in a second embodiment.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3 in the second embodiment.

FIG. 5 is a diagram corresponding to FIG. 3 in a third embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 ship 2 water 3 hull 7 room 12 propulsion device 14 electric motor 16 battery 17 controller 20 jet injection means 22 water passage 23 hole center 26 bearing case 27 shaft center 28 stationary blade 29 impeller 31 internal space 32 bearing 33 rotation shaft 34 impeller main body 35 Power transmission shaft 38 Seat 39 Rider seat 40 Tandem seat 41 Seating surface

Claims (2)

[Claims] An electric motor mounted on a hull, a battery capable of supplying electric power to the electric motor, and water being supported at a rear portion of the hull and interlocking with the electric motor to spray water toward the rear of the hull. And a saddle-ride type seat supported at a middle part of the hull in the front-rear direction, wherein a rear end of the battery is located rearward of a front end of a seating surface of the seat. An electric propulsion device in a small boat in which this battery is disposed so as to be located. 2. An electric motor mounted on a hull, and jetting means supported by a rear portion of the hull and capable of jetting water toward the rear of the hull in conjunction with the electric motor,
The jet injection means is provided at a rear portion of the hull, extends in the front-rear direction, communicates a lower portion of the hull with the rear of the hull, and is disposed substantially on the hole center of the water passage, and is provided on the hull. In a small boat having a supported bearing case and an impeller supported by the bearing case so as to be rotatable about an axis located substantially on the hole center, the motor is housed inside the bearing case. An electric propulsion device for a small boat in which the impeller is linked to the electric motor.