JP2001233290A - Hull propelling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small, lightweight and excellently manageable hull propelling machine. SOLUTION: A propelling part 106 for housing a motor-driven pump for arranging a water supply port and a water discharge port on both ends is arranged in a tip part of a rod part 104 freely rotatable around the extending directional axis by extending downward from a base part 103 installed on the hull 101 by an installing part, and the rod part 104 can be freely rotated by an operation part 105 arranged on the other end of the rod part 104. When starting the motor-driven pump, water supplied from the water supply port is sent to the water discharge port to thereby generate propulsion, and this propulsion can be made to act on the hull 101. The direction of the propelling part 106 is changed by rotating the rod part 104 around the axis by operation by the operation part 105 to thereby change the propelling direction of the hull 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hull propulsion device mounted on a hull to generate a propulsion force on the hull.

[0002]

2. Description of the Related Art Conventionally, as a propulsion device that generates a propulsion force by being attached to a hull such as a boat or a yacht, a propulsion device using a propulsion device such as a screw or a device called a jet jet type is known. is there.

In the case of a structure using a propulsion device such as a screw, the rotational force of an engine or an electric motor is transmitted to a screw disposed underwater, thereby obtaining a propulsion force. An example of such a structure is disclosed in Japanese Patent Laid-Open No. 9-1938.
No. 94 discloses an invention in which the rotational force of a motor installed on a hull is transmitted to a screw disposed underwater via a rod. In the present invention, the screw is housed in the housing. This makes it possible to provide a device with higher safety than a device in which the screw is exposed in the sea.

A jet-jet type propulsion device is a kind of axial-flow water pump, in which a rotating blade called an axial-flow impeller is attached to the tip of an impeller shaft which is driven to rotate by an engine, and water is sucked up from below. Water is jetted backward from a small-diameter nozzle to obtain propulsion.

[0005]

In a propulsion apparatus having a structure using a propulsion device such as a screw, a propulsion device such as a screw is connected to a motor disposed on a hull, and the motor disposed on such a hull. It is generally driven to rotate by receiving power transmission from the power source. Therefore, in order to adjust the angle of the propulsion device such as a screw to change the traveling direction,
The propulsion device must be rotated together with the prime mover arranged on the hull, and there is a problem that operability is poor.

Further, the jet-jet type propulsion device has a problem that the size of the device is inevitably increased and a large water flow resistance is received from the front during traveling. In other words, the efficiency is reduced by the water flow resistance. In addition, there is a problem that the apparatus is not suitable for mounting on a small boat, yacht, or the like because the apparatus becomes large.

On the other hand, in recent years, the number of people enjoying small boats and yachts has increased, and as a propulsion device for such a small hull, a small, lightweight, easily maneuverable and highly efficient propulsion device has been realized. Is desired.

An object of the present invention is to provide a hull propulsion device that is small, lightweight, and easy to handle.

It is another object of the present invention to provide an efficient hull propulsion device.

Another object of the present invention is to obtain a hull propulsion device having excellent durability.

Another object of the present invention is to provide a hull propulsion device which is easy to carry on land.

[0012]

According to a first aspect of the present invention, there is provided a hull propulsion apparatus comprising: a base provided with a mounting portion for a hull; and a direction extending downward from the base mounted on the hull. A rod portion rotatably attached to the base portion around an axis in an extending direction, and a rod portion provided at one end of the rod portion positioned on water with the base portion attached to the hull; An operating part for rotating operation around an axis, and another end of the rod part which is positioned in water with the base mounted on the hull are provided at another end, and a water supply port and a drain port are arranged at both ends. And a drive control circuit that is connected to the electric pump via a power supply line and a control line, and that drives and controls the electric pump.

Therefore, when the electric pump is started by the drive control of the drive control circuit, the water supplied from the water supply port is sent to the drain port, thereby generating a propulsive force, and the propulsive force acts on the hull. The attitude of the propulsion unit in which such an electric pump is housed changes by rotating the rod unit around its axis by an operation of the operation unit. That is, by rotating the rod portion about the axis in the extending direction, the propulsion portion turns left and right, and as a result, the propulsion direction of the hull can be changed.

According to a second aspect of the present invention, there is provided the hull propulsion device according to the first aspect, wherein the electric pump directs a fluid sucked from the water supply port to the drain port inside a cylindrical stator. This is an in-line pump in which a rotor having axial flow blades to be fed in an axial direction is rotatably provided.

Accordingly, the fluid is sent out from the water supply port to the drainage port by the rotation of the axial flow blade, thereby generating a propulsive force.

According to a third aspect of the present invention, there is provided the hull propulsion device according to the second aspect, wherein the in-line type pump rotates the fluid sent toward the drainage port by the axial flow blade of the rotor. A first pressure chamber that converts energy into static pressure energy, and a second pressure chamber that is disposed between the first pressure chamber and the drain port and is separated from the first pressure chamber by a partition wall. And a guide hole disposed on an outer peripheral portion of the partition wall and connecting between the first pressure chamber and the second pressure chamber.

Therefore, when the rotor is rotated, the fluid sucked from the water supply port is sent to the first pressure chamber by the axial flow blade, and the rotational kinetic energy is converted into static pressure energy in the first pressure chamber, Further, the water is discharged from the drain hole through the guide hole through the second pressure chamber.

According to a fourth aspect of the present invention, in the hull propulsion device according to the third aspect, in the in-line type pump, the rotation shaft of the rotor is rotatably supported at a center of the partition wall with a predetermined clearance. The sliding wall is provided, and a leakage flow path communicating the second pressure chamber and the inner peripheral surface of the sliding bearing is formed in the partition wall.

Therefore, the fluid in the second pressure chamber is interposed between the rotating shaft of the rotor and the sliding bearing with a uniform pressure distribution, so that the rotating shaft can be favorably maintained for a long period of time.

According to a fifth aspect of the present invention, in the hull propulsion device according to the third or fourth aspect, in the in-line type pump, the second pressure chamber has a second shaft that rotates integrally with the rotor. Flow vanes are provided.

Therefore, the fluid can be sent by dispersing the pressure by the axial flow blade provided inside the stator and the second axial flow blade provided in the second pressure chamber.

The invention according to claim 6 is the invention according to claims 3 to 5
In the hull propulsion device according to any one of the above, in the in-line type pump, the diameter of the concave portion of the axial flow vane whose radius around the axis of the rotor is minimized is to support the sliding bearing. The diameter is set to be larger than the diameter of the support portion formed on the partition wall.

Therefore, it is possible to reduce the vortex loss due to the collision between the fluid sent by the axial flow blade and the supporting portion supporting the sliding bearing, and to prevent the occurrence of cavitation.

The invention described in claim 7 is the third invention to the sixth invention.
In the hull propulsion device according to any one of the above, in the in-line type pump, the axial flow blade has a shape in which a spiral groove is formed on a cylindrical or cylindrical outer periphery, and the width and the depth of the spiral groove Are set to values substantially equal to each other.

Therefore, by appropriately setting the relationship between the width and the depth of the spiral groove, the flow path resistance can be reduced and the generation of vortices can be suppressed. Thereby, the fluid can be sent more efficiently.

According to an eighth aspect of the present invention, in the hull propulsion device according to the second aspect, the in-line type pump includes a rotary motion of the fluid sent toward the drain port by the axial flow blade of the rotor. A pressure chamber for converting energy into static pressure energy, a centrifugal blade arranged in the pressure chamber and rotating integrally with the rotor, and the fluid sucked from the water supply port through the outer peripheral portion of the stator to receive the pressure. A suction flow path that is guided so as to be guided into a chamber and feeds the centrifugal blade toward a surface on the side opposite to the axial flow blade; and the rotation of the centrifugal blade causes the fluid in the pressure chamber to rotate around the outer periphery of the pressure chamber. And a guide passage leading from the section to the drain port.

Therefore, when the rotor is rotated, the fluid sucked in from the water supply port is sent to the pressure chamber by the axial flow blade, where the rotational kinetic energy is converted into static pressure energy by the pressure chamber. It is led to the pressure chamber via the suction channel. The fluid guided to the pressure chamber via the two paths is discharged from the drain through the guide passage by the rotation of the centrifugal blade. Thereby, a fluid can be sent efficiently. In this case, the centrifugal blade rotating integrally with the axial flow blade receives the pressure of the fluid sent by the axial flow blade and the pressure of the fluid sucked from the suction flow path, but in a direction in which the bidirectional pressures cancel each other. Since it acts, the thrust load given to the rotor by the fluid can be reduced, and the loss can be reduced.

According to a ninth aspect of the present invention, in the hull propulsion device according to the eighth aspect, in the in-line type pump, a connection portion between the guide passage and the pressure chamber has an energy of a fluid flowing through the rotor. Are determined so as to be substantially equal at a symmetric position about the axis.

Therefore, the radial load on the rotor can be reduced. Note that “fluid energy” is energy that can be represented by the product of the flow velocity and pressure of a fluid.

According to a tenth aspect of the present invention, there is provided the hull propulsion device according to any one of the first to ninth aspects, wherein the operation unit hermetically accommodates and holds the drive control circuit, The control line is wired in the rod portion.

Thus, the drive control circuit is compactly housed in the operation unit. Further, a power supply line and a control line connecting the drive control circuit and the electric pump are also hermetically stored in the rod portion.

According to an eleventh aspect of the present invention, in the hull propulsion device according to any one of the first to tenth aspects, the rod portion is attached to the base portion so as to be rotatable around a horizontal axis. The operating section is capable of rotating the rod section about the horizontal axis.

Thus, by rotating the rod around the horizontal axis while the base is attached to the hull, the propulsion unit can jump up from the water surface.

According to a twelfth aspect of the present invention, in the hull propulsion device according to the eleventh aspect, the base portion includes a battery accommodating portion for accommodating and holding a battery serving as a drive source of the electric pump, a wheel, and the propulsion device. A holding unit that holds the operation unit in a state where the unit is flipped up.

Thus, by holding the operating section on the holding section in a state where the propulsion section is flipped up, the operator can move the hull propulsion apparatus while gripping the rod section or the propulsion section. In this case, the wheels assist in easy movement of the hull propulsion device.

According to a thirteenth aspect of the present invention, in the hull propulsion device according to the twelfth aspect, the operating portion is rotatably attached to an end of the rod portion, and the holding portion includes Hold the operation unit in the folded state.

Thus, the operation unit is held in a compact state by the holding unit.

According to a fourteenth aspect of the present invention, in the hull propulsion device according to any one of the first to thirteenth aspects, the base includes a holding portion for holding a rear end edge of the hull.

Thus, the base portion can be easily attached to and detached from the hull by holding the rear end edge of the hull by the holding portion.

[0040]

An embodiment of the present invention will be described with reference to the drawings.

[Outline of Hull Propulsion Apparatus] First, the outline of the hull propulsion apparatus will be described with reference to FIGS.

FIG. 1 is an overall perspective view of a hull propulsion device 102 mounted on a boat 101 which is a hull. The hull propulsion device 102 includes a base 103 detachably mounted on the boat 101, and a pipe-shaped rod 10 extending substantially vertically downward from the base 103 mounted on the boat 101.
4 is provided at the upper end of the rod portion 104.
5. A propulsion unit 106 is attached to the lower end. In a normal use mode, the propulsion unit 106 is held in a state of being immersed below the water surface WS. Hereinafter, each component will be described in detail.

FIG. 2 is a perspective view of the hull propulsion device 102 showing a mounting structure on the boat 101, and FIG. 3 is a perspective view of the hull propulsion device 102 as viewed from the rear side. The base 103 is a mounting portion 1 as a holding portion for the rear edge 107 of the boat 101.
08. The mounting portion 108 is provided with a fixed wall 109 erected substantially vertically, a pair of clamp pieces 110 facing the fixed wall 109, and an abutting member formed by screwing and screwing into these clamp pieces 110. 111 is fixed wall 1
09 and a pair of clampers 112 approaching in the direction of 09. These clampers 112 have handles 113 for operation by an operator. Therefore, in order to mount the hull propulsion device 102 to the rear end edge 107 of the boat 101, the abutment body 111 of the clamper 112 is separated from the fixed wall 109 and is evacuated.
Trailing edge 10 of the boat 101 between the
The hull propulsion device 102 is set so as to sandwich the boat 7, the handle 113 is operated in this state, the clamper 112 is screwed in, and the contact body 111 is brought into contact with the rear edge 107 of the boat 101. Thereby, the trailing edge 107 of the boat 101
Is clamped by the clamper 112, and the hull propulsion device 102 is mounted on the boat 101.

FIG. 4 is a perspective view showing a state in which the propulsion unit 106 (not shown in FIG. 4) is flipped up. As shown in FIGS. 3 and 4, the rod portion 104 is attached to the base 103 so as to be rotatable around a horizontal axis 114. More specifically, a rod holder 115 is provided above the rod portion 104, and the rod holder 115
Are rotatably attached to the horizontal shaft 114. The horizontal shaft 1 is attached to the base 103 and the rod holder 115.
A lock mechanism 116 is provided for fixedly positioning the rod portion 104 rotated around 14 at a predetermined position. That is, the base 103 is provided with a pair of 1/4 sector-shaped lock plates 117 at its rear end, and these lock plates 117 are formed with grooves 118 corresponding to the lockable pitch of the rod 104. Have been. And
The rod holder 115 provided on the rod portion 104 includes:
Grooves 118 respectively formed in a pair of lock plates 117
The lock body 119 that fits into the connector is screwed. The locking body 119 does not show a screwing structure with respect to the rod holder 115, but the operator grips and rotates the knob 120 shown in FIGS. 3 and 4 to rotate the groove portions 118 formed on the pair of locking plates 117. It is of a structure that moves to a position where it fits in and a position where it fits out.

The rod portion 104 is formed so as to be rotatable around its axial direction. That is, the rod 104
Is rotatably held by the rod holder 115 in a state where its sliding movement in the axial direction is restricted. The structure for restraining the sliding movement in the axial direction may be, for example, a screw (not shown) provided at the other end of the fixed knob 121 shown in FIGS. A groove (not shown) is cut at a predetermined position on the outer peripheral portion of the rod portion 104, and the fixing knob 12
It is such that the tip of a screw (not shown) provided at the other end of the connector 1 is fitted. But rod part 10
As a structure for restricting the sliding movement of the rod 4 in the axial direction, in addition to such a structure, any known structure for restricting the sliding movement of the rod-shaped member can be applied. According to the structure of the present embodiment, the operator grasps the fixing knob 121 and screws it in until the tip of a screw (not shown) comes into contact with the rod portion 104 and pushes it in. Can also be restrained from relative rotation.

FIG. 5 is an exploded perspective view showing the storage state of the drive control circuit in the operation unit 105. Operation unit 105
As shown in FIGS. 3 and 4, a housing 122 is fixedly attached to the upper end of the rod portion 104, and a rod-like operation rod 123 attached to the housing 122. The housing 122 has a lid 1
A circuit board 126 on which a drive control circuit 125 is mounted, a volume 127 connected to the circuit board 126, and a battery (not shown) are hermetically stored and held. That is, the housing 122 has a waterproof structure, and protects the drive control circuit 125 and the like from moisture. The operating rod 123 is rotatably attached to the housing 122, and is configured so that its rotating operation can rotate a variable portion (not shown) of the volume 127 to change its resistance value. Have been. A waterproof structure is also provided between the operation rod 123 and the housing 122. A power supply line 128 and a control line 129 extend from the drive control circuit 125 to an in-line type pump P (to be described in detail later) as an electric pump incorporated in the propulsion unit 106. Line 129
Are wired to the propulsion unit 106 through the inside of the rod unit 104.

Here, the drive control circuit 125 drives and controls the in-line pump P using a battery (not shown) as a drive source. At this time, the resistance value of the volume 127 is changed by the rotation of the operation rod 123. Accordingly, the drive control circuit 125 performs PWM (pulse width modulation) control to control the input voltage input to the in-line pump P.

Next, the in-line pump P is provided with a water supply port 17 and a water discharge port 19, as will be described later.
It has a structure in which water sucked in from 7 is guided to a drain port 19 to obtain propulsion. Such an inline pump P is housed and held in the propulsion unit 106 such that the water supply port 17 faces forward in the traveling direction of the boat 101 and the drain port 19 faces rearward in the traveling direction of the boat 101. Less than,
6 to 15 show a hull propulsion device 1 according to the present embodiment.
Various in-line pumps P applicable to 02 are introduced.

[Embodiment of In-Line Pump P] A first embodiment of the in-line pump P will be described with reference to FIGS. Fig. 6 shows an inline pump P1
7, FIG. 7 is a sectional view taken along the line AA in FIG. 1, and FIG. 8 is a longitudinal sectional view showing a part of the rotor.

In FIG. 6, reference numeral 1 denotes a motor. The motor 1 includes a cylindrical stator 2 and a rotor 3. The stator 2 has a stator core 4 formed by laminating an annular iron core, a coil 5 wound around the stator core 4, and a resin layer 6 covering the coil 5 together with the end face of the stator core 4.

The rotor 3 has an axial blade 8 fixedly provided with a rotating shaft 7 at the center, and a magnetic pole 9 provided on a part of the outer periphery of the axial blade 8. The axial flow blade 8 in the present embodiment has a spiral groove 11 formed on the outer periphery of the cylindrical body 10, and as shown in FIG. 8, the width w and the depth h of the spiral groove 11 are set to substantially equal values. Have been.

A flange 12 is fixed to one end of the stator 2. The flange 12 has a dome-shaped support portion 14 for supporting the bearing 13 and an opening 15 opening around the support portion 14, and a plurality of rectifying plates 16 are radially formed in the opening 15. ing.

A water supply port 18 having a water supply port 17 for sucking a fluid is fixed to the surface of the flange 12. A peripheral edge of a cup-shaped drain port body 20 having a drain port 19 is fixedly joined to a peripheral edge of the other end of the stator 2, and a partition wall 21 is provided inside the drain port body 20. Although this partition wall 21 is formed integrally with the drain port body 20, it may be formed by a separate member and fixed to the drain port body 20. A first pressure chamber 22 is formed between the partition wall 21 and the ends of the stator 2 and the rotor 3, and the first pressure chamber 22 is formed.
And a second pressure chamber 23 is formed between
These pressure chambers 22 and 23 are connected by a plurality of guide holes 24 formed on the outer peripheral portion of the partition wall 21. As shown in FIG. 7, a rib 25 connecting the inner peripheral surface of the drain port body 20 and the outer peripheral edge of the partition wall 21 is provided at the center of the guide holes 24. The inclination angles of the axial flow blades 8 with respect to the rotating shaft 7 are determined so that the ribs 25 can correct the flow of the fluid in the swirling direction in the axial flow direction.

Further, as shown in FIG. 6, a support portion 27 for supporting the outer periphery of the slide bearing 26 is provided at the center of the partition wall 21.
And a leak passage 28 communicating the second pressure chamber 23 and the inner peripheral surface of the slide bearing 26.

The rotating shaft 7 of the rotor 3 is rotatably supported by a bearing 13 and a slide bearing 26. Further, the diameter of the concave portion (the bottom of the spiral groove 11 in this example) of the axial flow blade 8 having the minimum radius centered on the axis (rotation center) of the rotor 3 is set to be larger than the diameter of the support portion 27. I have.

In such a configuration, the water supply port 17 is connected to the fluid supply source, the drainage port 19 is connected to the fluid supply destination,
When a current is applied to the coil 5, the motor 1 is driven. That is, the rotor 3 having the axial flow blade 8 rotates. As a result, the fluid is sucked in from the water supply port 17, is rectified by the rectifying plate 16 formed in the opening 15 of the flange 12, is sent to the first pressure chamber 22 by the axial flow vanes 8, and is further fed through the guide hole 24. The water is discharged from the drain 19 through the second pressure chamber 23. In this case, although the fluid is sent while rotating by the rotation of the axial flow blade 8, the rotational kinetic energy is converted into static pressure energy in the first pressure chamber 22, so that the fluid can be efficiently sent out from the drain port 19. it can.

That is, the rotational speed of the fluid discharged from the spiral groove 11 becomes lower as the radius of the rotation becomes closer to the outer circumference, and the difference in the speed of the kinetic energy is converted into pressure.

In this embodiment, a slide bearing 26 is provided at the center of the partition wall 21 to rotatably support the rotating shaft 7 of the rotor 3 with a predetermined clearance. Since the leak passage 28 that connects the chamber 23 and the inner peripheral surface of the slide bearing 26 is formed, the second pressure chamber 2 is provided between the rotation shaft 7 of the rotor 3 and the slide bearing 26.
The fluid in 3 intervenes with a uniform pressure distribution. Therefore, the lubrication of the rotating shaft 7 can be favorably maintained for a long time.

Further, in the present embodiment, the diameter of the concave portion (the bottom of the spiral groove 11 in this example) of the axial flow blade 8 having the minimum radius centered on the axis of the rotor 3 is larger than the diameter of the support portion 27. Since the diameter is determined, the fluid can be easily guided to the outside of the first pressure chamber 22 in which the guide hole 24 is formed, and the fluid sent by the axial flow blade 8 and the sliding bearing 26 are formed. Loss due to collision with the supporting portion 27 to be supported can be reduced.

The concave portion of the axial flow blade having a diameter larger than the diameter of the support portion 27 is not limited to the above example. For example, as described in JP-A-10-246193, a plurality of core pieces are laminated to include a concave portion in an axial flow blade having salient poles and concave portions. In the case where an axial flow blade called a screw or an impeller having a plurality of inclined blades is used, the root of the blade with respect to the rotating shaft is a concave portion.

That is, making the diameter of the concave portion of the axial flow blade larger than the diameter of the support portion 27 means that the support portion 2
That is, the dimension and shape of the axial flow blade are determined so as to facilitate the flow of the fluid toward the outside in the radial direction of 7. The axial flow blade 8 satisfies this condition. By using the axial flow blade 8, loss due to collision between the sent fluid and the support portion 27 supporting the slide bearing 26 can be reduced.

As shown in FIG. 8, the axial flow blade 8 is
The spiral groove 11 is formed on the outer periphery of the zero. In this case, as w and h are made as large as possible, the flow path resistance is reduced and the efficiency is improved. However, when h is constant, w>
As w is increased so as to become h, the laminar flow normal state is disturbed, and a turbulent flow returning to the suction side behind the spiral groove 11 in the rotation direction is generated, and the efficiency is reduced. When w <h, the above turbulence does not occur, but the flow path resistance increases and the efficiency decreases. However, in the present embodiment, the spiral groove 11
Since the width w and the depth h are determined to be substantially equal,
The fluid can be sent more efficiently.

Next, a second embodiment of the in-line pump P will be described with reference to FIG. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 9 is a vertical sectional side view of the in-line pump P2.

In the in-line pump P2 according to this embodiment, the rotary shaft 7 of the rotor 3 extends to the second pressure chamber 23, and the second axial flow blade 29 is fixedly provided at the extended portion. ing. The second axial flow blade 29 uses an axial flow impeller having a plurality of blades.

In such a configuration, the fluid is sent by dispersing the pressure by the axial blade 8 provided inside the stator 2 and the second axial blade 29 provided in the second pressure chamber 23. be able to. Further, the power of the motor 1 can be dispersed. In this way, when the rotor 3 is downsized, the second axial blade 29 can compensate for the decrease in the fluid feeding performance of the axial blade 8. Thereby, the motor 1
The fluid can be sent efficiently while satisfying the requirement of miniaturization.

Next, a third embodiment of the in-line pump P will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted.
FIG. 10 is a vertical side view of the in-line pump P3, and FIG.
FIG. 11 is a longitudinal side view of the in-line pump P3 shown in FIG. 10 viewed from a direction different by 90 degrees.

The motor 1 according to the present embodiment has a cylinder 30 that covers the outer periphery of the stator 2. At one end (the lower end in FIGS. 10 and 11) of the motor 1 is a connection port 3
1 is fixed. The connection port body 31 is separated from a pressure chamber 32 that converts the rotational kinetic energy of the fluid sucked by the axial flow vanes 8 of the rotor 3 into static pressure energy by 180 degrees at an outer peripheral portion of the pressure chamber 32. And two pipe-shaped guide passages 33 projecting downward from the position. These guide passages 33 are joined on an extension of the center of the rotor 3, and the drain 1
9 are formed. The pressure chamber 32 has the rotor 3
A centrifugal blade 35 fixed to the lower end of the rotary shaft 7 is provided. One end of the rotating shaft 7 penetrating through the centrifugal blade 35 is rotatably supported by a bearing 37 supported by a support portion 36 provided at the center of the connection port body 31.

Reference numeral 38 denotes a suction case formed in a container shape. The opening surface of the suction case 38 has a water supply port 1 at the center.
7 is covered by the suction port body 40 formed. The motor 1 and a part of the connection port 31 are housed in a suction case 38.

FIG. 12 is a bottom view of the in-line pump P3 viewed from the direction of arrow B in FIG. In the figure, 32
a is a bottom surface of the pressure chamber 32, and the bottom surface 32a is formed in a disk shape in accordance with the bottom surface of the cylindrical motor 1. However, only the guide flow path 33 is exposed below the suction case 38. It is formed in a shape.

The outer periphery of the motor 1 and the connection port 31
A suction passage 41 for sucking fluid is formed between the outer periphery of the suction case and the inner surface of the suction case 38. This suction channel 41 is
As shown by arrows in FIGS.
The path is determined so that the fluid sucked in from 7 is guided to the pressure chamber 32 via the outer peripheral portion of the stator 2 and is sent toward the surface of the centrifugal blade 35 on the side opposite to the axial flow blade 8.
That is, as shown in FIG.
A connection portion 41a is provided which is connected to two connection holes 42 formed at symmetrical positions on the bottom of the pressure chamber 32 of the connection port body 31 with the center of the rotation shaft 7 therebetween. This connecting portion 41a
As is apparent from FIG. 10, the connection port 31 is disposed so as to slip through between the bottom surface 32 a of the pressure chamber 32 and the guide channel 33.

In such a configuration, when the rotor 3 is rotated, the fluid sucked from the water supply port 17 is rectified by the rectifying plate 16 formed in the opening 15 of the flange 12, and the pressure chamber is formed by the axial flow blade 8. The rotational kinetic energy is converted to static pressure energy in the pressure chamber 32 and is guided to the pressure chamber 32 via a suction passage 41 of another system. The fluid guided to the pressure chamber 32 via these two paths is discharged from the drain port 19 via the guide passage 33 by the rotation of the centrifugal blade 35. Thereby, a fluid can be sent efficiently.

In this case, the centrifugal blade 35 that rotates integrally with the axial flow blade 8 receives the pressure of the fluid sent by the axial flow blade 8 on the upper surface in FIGS. 10 and 11, and passes through the connection portion 41 a of the suction flow path 41. The pressure of the sent fluid is received on the lower surface. That is, since the bidirectional pressures act in directions that cancel each other, the thrust load that the fluid exerts on the rotor 3 can be reduced.

Most of the suction passage 41 formed between the motor 1 and the outer periphery of the pressure chamber 32 has an annular shape and a uniform passage cross-sectional area.
The connection portion 41a and the guide flow path 33 of the connection port body 31 which are a part of the connector 1 are formed with symmetrical shapes and dimensions at symmetrical positions about the axis of the rotating shaft 7 of the rotor 3. That is, the suction flow path 41 and the guide flow path 33 are determined so that the energy of the flowing fluid is substantially equal at a symmetric position about the axis of the rotor 3. Therefore,
The radial load on the rotor 3 can be reduced. Thereby, the life of the bearings 13 and 37 and the rotating shaft 7 can be increased, and the motor 1 can be smoothly rotated for a long period of time.

Next, a preferred embodiment of the in-line pump P will be described with reference to FIGS. The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof is omitted. 13 is a longitudinal side view of the in-line pump P4, FIG. 14 is a longitudinal side view of the in-line pump P4 shown in FIG. 13 viewed from a direction different by 90 degrees, and FIG. 15 is a view taken along line CC in FIG. .

The in-line pump P4 of the present embodiment
Has the same basic configuration as the in-line pump P3 introduced as the third embodiment. The difference is
It is only the shape of the suction case 38. In other words, the suction case 38 has a smooth shape on the water supply port 17 side and the drain port 19 side, and is formed so as to reduce the resistance of the fluid. In other respects, there is no difference from the in-line pump P introduced as the third embodiment, and the description thereof will be omitted.

[Operation] The hull propulsion device 10 of the present embodiment
2 will be described.

When the power switch (not shown) is turned on and the in-line pump P is started by drive control by the drive control circuit 125, the in-line pump P, which is an electric motor, is drive-controlled to start operation. That is, the water sucked in from the water supply port 17 is rectified by the rectifying plate 16 formed in the opening 15 of the flange 12, is pressure-fed by the axial flow blade 8, and is discharged from the drain port 19. At this time, each of the in-line pumps P from the first embodiment to the preferred embodiment described above is used for the hull propulsion device 1 of the present embodiment.
02, the respective in-line pumps P operate as described above. As a result, a thrust is generated in the in-line pump P, and this thrust acts on the boat 101. Propulsion unit 106 that accommodates such an in-line pump P
The posture is changed by rotating the rod portion 104 around its axis by the operation of the operation portion 105 while gripping the operation rod 123. That is, by rotating the rod portion 104 about its axis, the propulsion portion 106 turns left and right, and as a result, the propulsion direction of the boat 101 can be changed.

In order to vary the output of the in-line pump P, the operation rod 123 of the operation section 105 may be rotated. Thereby, the resistance value of the volume 127 is changed, and the drive control circuit 125 receiving the signal
Controls the input voltage input to the in-line pump P by performing PWM (pulse width modulation) control, and varies the output of the in-line pump P. Since the propulsive force of the in-line pump P fluctuates by variably controlling the output of the in-line pump P, the operator operates the operation unit 105.
By rotating the operation rod 123 in the boat 1, the boat 1
01 can be freely controlled.

Next, depending on the situation, there is a case where it is desired that the propulsion unit 106 be jumped up and out of the water surface WS. For example, if you want to propel the boat 101 by rowing,
This is the case where the hull propulsion device 102 is to be attached to or detached from one. In such a case, by releasing the lock in the lock mechanism 116, the propulsion unit 106 can be easily flipped up. To release the lock in the lock mechanism 116, as described above, it is only necessary to rotate the knob 120 in the direction of grasping and loosening. Thereby, the lock body 119
Is dropped from the groove 118 of the lock plate 117 and the rod 1
04 is rotatable about a horizontal axis 114.

In this embodiment, the operation unit 10
5 is a drive control circuit 125 inside the housing 122.
And the power supply line 128 and the control line 129.
The drive control circuit 125 is compactly housed in the operation unit 105 because is wired inside the rod unit 104. The power supply line 128 and the control line 129 are also stored inside the rod 104 without waste.

Further, the base 103 is provided with the mounting portion 10 functioning as a holding portion for holding the rear end edge 107 of the boat 101.
8, the rear edge 107 of the boat 101 is sandwiched by the mounting portion 108, so that the base 1
03 can be easily attached and detached.

Next, another embodiment of the present invention will be described with reference to FIG.
18 will be described with reference to FIG. The same parts as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, the battery 103 is attached to the base 103.
1 is provided, and a holding section 203 is provided for holding the operation section 105 in a state where the propulsion section 106 is flipped up, so that such a base section 103 can be easily transported. Hull propulsion device 10
2.

First, the base 103 has a housing-like housing structure provided with a battery housing 202 for housing and holding the battery 201.
4 is detachably attached. And the base 10
A mounting portion 108 as a holding portion for a rear end edge 107 of the boat 101 (see FIGS. 1 and 2) is fixed to one side wall of the boat 3 by welding or the like. This mounting part 108
Has the same structure as the above-described embodiment except that the mounting direction of the clamper 112 is reversed. That is, as shown in FIG.
13 is located inside the boat 101 in the above-described embodiment, whereas in the present embodiment, 13 is disposed outside the boat 101 on the rear side in the traveling direction.

The housing structure of the base 103 accommodates a drive control circuit 125 (see FIG. 5) which is located below the battery accommodating portion 202 for the battery 201 and is not shown in FIGS. ing.

Next, the operation section 105 is moved to the rod section 104.
And has a rod-like shape having substantially the same diameter as that of the rod-shaped portion, and is connected to the rod portion 104 via a joint 205 so as to be rotatable 180 degrees. 16 and FIG. 1 are attached to the base lid 204 of the base 103.
8, the rod portion 104 and the operating portion 105 rotated 180 degrees with respect to the rod portion 104 are held in a state where the rod portion 104 is rotated about a horizontal axis 114 and the propulsion portion 106 is flipped up. A holding section 203 is provided.

Further, the base 103 is provided with a pair of wheels 206 in a housing structure portion thereof. These wheels 20
6, the rod unit 10 and the operating unit 105 are held by the holding unit 203 as shown in FIG.
The hull propulsion device 102 is rotatably mounted at a position where the hull propulsion device 102 can be easily transported on land by lifting the distal end side or the propulsion portion 106.

In such a configuration, the basic functions and effects of the hull propulsion device 102 of the present embodiment are the same as those of the above-described embodiment, and therefore description thereof will be omitted. On the other hand, in the present embodiment, the rod portion 10
By lifting the distal end side of the rod portion 104 or the propulsion portion 106 with the holding portion 4 and the operation portion 105 held by the holding portion 203, the hull propulsion device 102
It can be easily transported. Moreover, since the holding section 203 holds the operation section 105 in a folded state, the operation section 105 is held by the holding section 203 in a compact state, and assists on-land transportation.

[0089]

According to the invention of the hull propulsion device according to the first aspect,
A base portion having a mounting portion for the hull, a rod portion attached to the base portion in a direction extending downward from the base portion mounted on the hull and rotatably around an axis in the extending direction; An operating unit for rotating the rod unit around its axis, the operating unit being provided at one end of the rod unit positioned on the water while the base unit is mounted on the hull, and the base unit being mounted on the hull. A propulsion unit that is provided at another end of the rod unit that is positioned in the water in a state where the water supply port and the drain port are disposed at both ends, and a power supply line and a control line are connected to the electric pump. And a drive control circuit for controlling the drive of the electric pump, so that the direction of the propulsion unit is changed to the left and right by rotating the rod part around the axis in the direction of extension, and thereby the hull Propulsion direction It can be easily changed.
Therefore, it is possible to obtain a hull propulsion device that is small, lightweight, and easy to handle.

According to a second aspect of the present invention, in the hull propulsion device according to the first aspect, the electric pump directs a fluid sucked from the water supply port to the drain port inside a cylindrical stator. Is an in-line type pump having a rotatable rotor having axial flow blades for sending out in the axial direction. Therefore, the positional relationship between the water supply port and the drainage port is suitable as an electric pump to be applied to the present invention. The part can be easily configured.

On the other hand, in the in-line type pump having such a configuration, rotational kinetic energy is given to the fluid by the axial flow blade, and the kinetic energy is not converted into the static pressure energy, and the frictional loss is generated in the inner peripheral wall and the drain. It is sent after being lost as eddy loss due to turbulence or turbulence, so it has one aspect that the efficiency as a pump is poor. In this regard, the invention according to claim 3 is the hull propulsion device according to claim 2, wherein the in-line type pump rotates the fluid that is sent toward the drainage port by the axial flow blade of the rotor. A first pressure chamber that converts energy into static pressure energy, and a second pressure chamber that is disposed between the first pressure chamber and the drain port and is separated from the first pressure chamber by a partition wall. And a guide hole arranged on the outer peripheral portion of the partition wall to connect between the first pressure chamber and the second pressure chamber, so that it is sent toward the drain port by the axial flow blade. By converting the rotational kinetic energy of the fluid into static pressure energy by the first pressure chamber, the fluid can be sent efficiently, thereby increasing the energy efficiency. Therefore, large energy can be generated by a small and light electric pump, and an efficient hull propulsion device can be obtained.

According to a fourth aspect of the present invention, there is provided the hull propulsion apparatus according to the third aspect, wherein in the in-line type pump, a rotation shaft of the rotor is rotatably supported at a center of the partition wall with a predetermined clearance. Is provided, and the partition wall is formed with a leak passage communicating the second pressure chamber and the inner peripheral surface of the slide bearing. Therefore, the fluid in the second pressure chamber can be interposed with a uniform pressure distribution, and therefore, the lubrication of the rotating shaft can be favorably maintained for a long time, and a hull propulsion device excellent in durability can be obtained.

According to a fifth aspect of the present invention, in the hull propulsion device according to the third or fourth aspect, in the in-line type pump, the second pressure chamber has a second shaft which rotates integrally with the rotor. Since the flow blade is provided, the fluid can be sent by dispersing the pressure by the axial flow blade provided inside the stator and the second axial flow blade provided in the second pressure chamber. Therefore, when the rotor is downsized,
The decrease in the fluid feeding performance of the axial flow blade can be compensated for by the second axial flow blade. As a result, the fluid can be sent efficiently while satisfying further miniaturization,
An efficient hull propulsion device can be obtained.

The invention according to claim 6 provides the invention according to claims 3 to 5
In the hull propulsion device according to any one of the above, in the in-line type pump, the diameter of the concave portion of the axial flow vane whose radius around the axis of the rotor is minimized is to support the sliding bearing. Since the diameter is set to be larger than the diameter of the support portion formed on the partition wall, loss due to collision between the fluid sent by the axial flow blade and the support portion supporting the sliding bearing can be reduced, and therefore, the efficiency is high. A hull propulsion device can be obtained.

The invention according to claim 7 provides the invention according to claims 3 to 6
In the hull propulsion device according to any one of the above, in the in-line type pump, the axial flow blade has a shape in which a spiral groove is formed in a cylindrical or cylindrical outer periphery, the width of the spiral groove and Since the depth is set to substantially the same value, the flow path resistance can be reduced and the generation of eddies can be suppressed. This allows
The fluid can be sent more efficiently, and a more efficient hull propulsion device can be obtained.

According to an eighth aspect of the present invention, in the hull propulsion device according to the second aspect, the in-line type pump includes a rotary motion of the fluid sent toward the drainage port by the axial flow blade of the rotor. A pressure chamber for converting energy into static pressure energy, a centrifugal blade arranged in the pressure chamber and rotating integrally with the rotor, and the fluid sucked from the water supply port through the outer peripheral portion of the stator to receive the pressure. A suction flow path that is guided so as to be guided into a chamber toward the surface of the centrifugal impeller opposite to the axial flow impeller, and the rotation of the centrifugal impeller causes the fluid in the pressure chamber to rotate around the outer periphery of the pressure chamber. And a guide passage leading from the section to the drain, so that the rotational kinetic energy of the fluid sucked from the water inlet and sent toward the drain by the axial flow blade is guided to the pressure chamber and converted into static pressure energy. It can deliver the fluid efficiently by. In addition, since the pressure acting on the centrifugal vanes from the fluid sent by the axial flow vanes and the pressure acting on the centrifugal vanes from the fluid passing through the suction flow path are offset, the thrust load given to the rotor by the fluid is reduced. Can be reduced. For this reason, large energy can be generated by the small and light electric pump, and an efficient hull propulsion device can be obtained.

According to a ninth aspect of the present invention, in the hull propulsion device according to the eighth aspect, in the in-line type pump, a connection portion of the guide passage with the pressure chamber is configured such that energy of a flowing fluid is equal to that of the rotor. It is determined to be substantially equal at the symmetrical position about the axis of, so that the load on the rotor in the radial direction can be reduced,
Therefore, an efficient hull propulsion device can be obtained.

According to a tenth aspect of the present invention, in the hull propulsion device according to any one of the first to ninth aspects, the operating section hermetically accommodates and holds the drive control circuit, Since the control line is wired in the rod portion, the drive control circuit can be compactly stored in the operation portion, and the power supply line and the control line connecting the drive control circuit and the electric pump are also provided in the rod portion. Therefore, it is possible to further reduce the size.

According to an eleventh aspect of the present invention, in the hull propulsion device according to any one of the first to tenth aspects, the rod is attached to the base so as to be rotatable around a horizontal axis. Since the operating portion is capable of rotating the rod portion around the horizontal axis, the propulsion portion bounces from the water surface by rotating the rod portion around the horizontal axis while the base is attached to the hull. It is possible to increase the variation of the usage mode.

According to a twelfth aspect of the present invention, in the hull propulsion device according to the eleventh aspect, the base portion includes a battery accommodating portion for accommodating and holding a battery serving as a drive source of the electric pump, a wheel, and the propulsion device. Since the holding unit holds the operating unit in a state where the unit is flipped up, the operator holds the operating unit in the holding unit in a state where the propulsion unit is flipped up, so that the operator can move the rod unit or the propulsion unit. The hull propulsion device can be moved while being gripped, so that a hull propulsion device that is easy to carry on land can be obtained.

According to a thirteenth aspect of the present invention, in the hull propulsion device according to the twelfth aspect, the operating part is rotatably attached to an end of the rod part, and the holding part is Since the operating section is held in a folded state, the operating section can be held by the holding section in a compact state, and therefore, further downsizing can be achieved.

According to a fourteenth aspect of the present invention, there is provided the hull propulsion device according to any one of the first to thirteenth aspects, wherein the base has a clamping portion for clamping a rear end edge of the hull. The base can be easily attached to and detached from the hull by holding the rear end edge of the hull.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing a state mounted on a hull (boat) as an embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting structure on a hull.

FIG. 3 is a perspective view seen from the back side.

FIG. 4 is a perspective view showing a state in which a propulsion device (not shown in FIG. 4) is flipped up.

FIG. 5 is an exploded perspective view showing a stored state of a drive control circuit in the operation unit.

FIG. 6 is a longitudinal sectional side view showing an in-line pump used in the hull propulsion device of the present invention.

FIG. 7 is a sectional view taken along line AA of FIG. 6;

FIG. 8 is a vertical sectional side view showing a part of a rotor.

FIG. 9 is a vertical sectional side view showing another in-line pump used in the hull propulsion device of the present invention.

FIG. 10 is a vertical sectional side view of another in-line pump used in the hull propulsion device of the present invention.

11 is a vertical side view of the in-line pump shown in FIG. 10 viewed from a direction different by 90 degrees.

FIG. 12 is a bottom view of the in-line pump as viewed from the direction of arrow B in FIG. 10;

FIG. 13 is a vertical sectional side view showing a preferred embodiment of an inline pump used in the hull propulsion device of the present invention.

FIG. 14 is a longitudinal sectional side view of the in-line pump shown in FIG. 13 viewed from a direction different by 90 degrees.

FIG. 15 is a view taken along line CC in FIG. 13;

FIG. 16 is a perspective view showing another embodiment of the hull propulsion device of the present invention.

FIG. 17 is an exploded perspective view showing the battery storage section in the base by disassembling the base.

FIG. 18 is a perspective view showing a state where the propulsion device is flipped up.

[Explanation of symbols]

Reference Signs List 2 Stator 3 Axial blade 10 Cylindrical body 11 Spiral groove 17 Water supply port 19 Drain port 21 Partition wall 22 First pressure chamber 23 Second pressure chamber 24 Guide hole 26 Sliding bearing 27 Support section 28 Leak flow path 29 Second Axial flow blade 32 Pressure chamber 33 Guide flow path 35 Centrifugal blade 41 Suction flow path 101 Hull (boat) 103 Base 104 Rod section 105 Operation section 106 Propulsion section 108 Mounting section, clamping section 114 Horizontal axis 125 Drive control circuit 128 Power supply line 129 Control line 201 Battery 202 Battery housing 203 Holder 206 Wheel P, P1, P2, P3, P4 Electric pump (in-line pump)

Claims (14)

[Claims] 1. A base provided with a mounting portion for a hull, and a base extending downward from the base mounted on the hull and being attached to the base so as to be rotatable around an axis in the extending direction. A rod part, provided at one end of the rod part which is positioned on the water with the base mounted on the hull, and an operation part for rotating the rod part around its axis; and A propulsion unit that is provided at another end of the rod unit that is positioned in the water while being mounted on the hull, and that accommodates an electric pump having a water supply port and a drain port disposed at both ends; and a power supply line to the electric pump. And connected via a control line,
A hull propulsion device comprising: a drive control circuit that drives and controls the electric pump. 2. The in-line electric pump according to claim 1, wherein the electric pump has a rotatable rotor having an axial flow vane for axially sending fluid sucked from the water supply port toward the water discharge port inside the cylindrical stator. The hull propulsion device according to claim 1, which is a type pump. 3. The first in-line pump, wherein the first pressure chamber converts rotational kinetic energy of the fluid sent toward the drainage port by the axial flow blade of the rotor into static pressure energy, and A second pressure chamber disposed between the pressure chamber and the drain port, the first pressure chamber being partitioned by a partition wall, and the first pressure chamber being disposed on an outer peripheral portion of the partition wall. The hull propulsion device according to claim 2, further comprising: a guide hole connecting between the first pressure chamber and the second pressure chamber. 4. In the in-line type pump, a slide bearing is provided at a center of the partition wall to rotatably support a rotating shaft of the rotor with a predetermined clearance.
4. The hull propulsion device according to claim 3, wherein a leak flow path communicating the second pressure chamber and an inner peripheral surface of the slide bearing is formed in the partition wall. 5. 5. The hull propulsion device according to claim 3, wherein in the in-line pump, the second pressure chamber is provided with a second axial blade that rotates integrally with the rotor. 6. In the in-line type pump, a diameter of a concave portion of the axial flow vane having a minimum radius centered on an axis of the rotor is a supporting portion formed on the partition wall for supporting the sliding bearing. The hull propulsion device according to any one of claims 3 to 5, wherein the diameter of the hull propulsion device is larger than the diameter of the hull. 7. In the in-line type pump, the axial flow blade has a shape in which a spiral groove is formed on a cylindrical or cylindrical outer periphery, and a width and a depth of the spiral groove are set to substantially equal values. The hull propulsion device according to any one of claims 3 to 6, wherein: 8. The pressure-chamber, wherein the in-line pump is arranged in the pressure chamber for converting rotational kinetic energy of the fluid sent to the drain port by the axial flow blade of the rotor into static pressure energy, and the pressure chamber. A centrifugal blade that rotates integrally with the rotor, and guides the fluid sucked from the water supply port to the pressure chamber via an outer peripheral portion of the stator, on a surface of the centrifugal blade opposite to the axial flow blade. 3. The suction channel according to claim 2, further comprising: a suction flow path having a path defined so as to feed the fluid into the pressure chamber; Hull propulsion device. 9. In the in-line type pump, a connection portion of the guide passage with the pressure chamber is determined such that energy of a flowing fluid is substantially equal at a symmetric position about the axis of the rotor. The hull propulsion device according to claim 8. 10. The operation unit according to claim 1, wherein the operation control unit hermetically accommodates and holds the drive control circuit, and the power supply line and the control line are wired in the rod unit. Hull propulsion device. 11. The apparatus according to claim 1, wherein the rod portion is attached to the base so as to be rotatable around a horizontal axis, and the operating portion is capable of rotating the rod portion around the horizontal axis. 11. The hull propulsion device according to any one of 10 above. 12. The base unit includes a battery housing unit for housing and holding a battery serving as a drive source of the electric pump, a wheel, and a holding unit for holding the operation unit in a state where the propulsion unit is flipped up. The hull propulsion device according to claim 11, comprising: 13. The hull propulsion device according to claim 12, wherein the operation unit is rotatably attached to an end of the rod unit, and the holding unit holds the operation unit in a folded state. . 14. The hull propulsion device according to claim 1, wherein the base has a holding portion for holding a rear end edge of the hull.