JPH08253196A - Water jet type outboard motor - Google Patents

Abstract

PURPOSE: To provide a water jet type outboard motor which is small and whose center of gravity is low and which can be installed in the rear of a transom plate. CONSTITUTION: An outboard motor 100 is installed on a transom plate 7 so that the whole of an outboard motor main body 130 is positioned in the rear of the transom plate 7 of the hull 6. In the outboard motor main body 130, a length in the horizontal direction (the lateral direction of the hull 6) is longer than a length in the vertical direction (the longitudinal direction of the hull 6). An engine is horizontally placed to the hull 6 in the outboard motor main body 130. A direction nozzle 153 and a reverse gate 156 of a jet nozzle 150 are operated by a steering bar 170. Exhaust air of the engine is diffused to the atmosphere through a silencer 160. Therefore, a vertical directional length of the outboard motor main body can be shortened, and since there is no need to arrange the outboard motor main body on the transom plate, a low and compact outboard motor can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship propulsion device, and more particularly to a water jet type outboard motor.

[0002]

2. Description of the Related Art Generally, ship propulsion devices include inboard motors that are often used for large ships and outboard motors that are often used for relatively small ships. The types of outboard motors are:
There are a screw type that uses a propeller and a water jet type that ejects a jet water stream.

Conventionally, a water jet type outboard motor 1, as shown in FIG. 12, has an internal combustion engine such as a single cylinder engine, an in-series multi-cylinder engine or a V-type engine (see FIG. 12).
Shows the case of the in-line multi-cylinder engine 2. ) Is stored in the outboard motor main body 3, a water intake port 4 for taking water into the outboard motor main body 3, and an impeller (not shown) in the outboard motor main body 3 that is taken in from the water intake port 4. It is configured with a jet nozzle 5 that ejects a jet water flow urged by rotation.

In the outboard motor 1, the screw portion of the conventional screw-type outboard motor is simply replaced with a pump, and the water intake port 4 and the bottom surface of the outboard motor need to be located at substantially the same height. A transom plate (stern plate) 7 provided at the rear portion of 6 is modified and attached. that time,
The upper front half of the outboard motor body 3 is placed on the transom plate 7. The reason is that the center of gravity of the outboard motor 1 needs to be moved to the front as far as possible in order to maintain the balance stability and maneuverability of the hull 6. That is, in both the water jet type and the screw type, in the conventional outboard motor 1, the heavy engine 2 is provided in the upper portion of the outboard motor main body 3, and the piston 2A and the cylinder 2B are arranged in the substantially front-back direction of the hull 6 (see FIG. Left and right direction of 12 drawings)
A state of being laid so as to follow (this is assumed to be vertical)
It is stored in. Therefore, the engine storage portion 3A of the outboard motor main body 3 is elongated in the front-back direction of the hull 6. Therefore, by disposing the front half portion of the engine storage portion 3A on the transom plate 7, the center of gravity is set to the front side. -ing

[0005]

However, in the conventional outboard motor 1, since the upper front half of the outboard motor body 3 is located on the transom plate 7, the center of gravity of the outboard motor 1 becomes high. Therefore, there is a problem that the stability of the ship when turning is not so good. In addition, the outboard motor 1 is also increased in height, and there is a drawback that it lacks compactness. For example, when the outboard motor 1 is detached from the hull 6 and is carried in the trunk of a car, the outboard motor 1 may or may not be installed depending on the size of the trunk. Must be laid aside, and oil and fuel from inside the engine 2 or water that has accumulated inside the outboard motor body 3 may enter the engine 2 through the exhaust port and cause troubles. There was inconvenience such as leakage to.

In order to solve the above-mentioned drawbacks, it may be possible to arrange the outboard motor body behind the transom plate instead of arranging it on the transom plate. However, in that case, since the engine is located behind the hull, the center of gravity of the ship is rearward compared to the case where it is located on the transom plate, and the strength of the transom plate is higher and the hull alone It is necessary to have a hull of a special design such that the center of gravity of the ship is located closer to the front or the center of gravity of the hull is located closer to the rear. That is, the above-mentioned outboard motor arranged behind the transom plate cannot be attached to the hull of a conventional screw type outboard motor, which is widely used, and has a drawback that it is not versatile.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a water jet type outboard motor which is small in size, has a low center of gravity, and can be mounted behind a transom plate.

[0008]

In order to achieve the above object, in a water jet type outboard motor according to the present invention, as in the invention described in claim 1, an outboard motor main body incorporating an internal combustion engine. And a jet nozzle for taking in water into the outboard motor body, and a jet nozzle for jetting the water taken into the outboard motor body from the water intake port as a jet water flow, and are attached to the outside of the stern part. The outboard motor body is characterized in that the outboard motor body has a lateral length along the left and right of the hull that is longer than a lateral length along the front and rear of the hull.

In the present invention, as in the invention described in claim 2, the internal combustion engine is a single-cylinder engine including a single cylinder and pistons, or a multi-cylinder in which a plurality of sets of cylinders and pistons are arranged vertically in series. The engine may be arranged in the outboard motor body so that the reciprocating direction of the piston is substantially along the longitudinal direction of the outboard motor body.

Alternatively, as in the invention described in claim 3,
The internal combustion engine is a V-type engine in which at least two sets of cylinders and pistons are arranged in two rows having a substantially V-shaped planar shape, and the angle sandwiched by the two rows of substantially V-shaped cylinders is The engine has a size of 90 ° or less, and an imaginary center line passing through the center of the angle sandwiched by the substantially V-shaped two rows of cylinders is provided in the outboard motor body in the longitudinal direction of the outboard motor body. You may arrange | position so that it may follow substantially.

Further, as in the invention described in claim 4,
The internal combustion engine is a V-type engine in which at least two sets of cylinders and pistons are arranged in two rows having a substantially V-shaped planar shape, and the angle sandwiched by the two rows of substantially V-shaped cylinders is The engine has a size of 90 ° or more, and the engine has a virtual center line passing through the center of an angle sandwiched between the two rows of substantially V-shaped cylinders in the outboard motor body in the lateral direction of the outboard motor body. It may be arranged so as to substantially follow.

Further, as in the invention described in claim 5, the internal combustion engine is an opposed type engine in which at least two sets of cylinders and pistons are arranged in two rows so as to face each other in opposite directions. The engine may be arranged in the outboard motor body such that the reciprocating direction of the piston is substantially along the longitudinal direction of the outboard motor body.

Further, in the invention according to claim 1, 2, 3, 4 or 5, the outboard motor body is fixed to the outboard motor body as in the invention according to claim 6. The jet nozzle may be non-rotatably fixed to the outside of the stern plate by an attaching means, and the jet nozzle may be attached to the main body of the outboard motor so as to be rotatable in the lateral direction.

Further, in the invention described in claim 6, as in the invention described in claim 7, the jet nozzle is
It may be connected to a steering rod provided in the outboard motor main body via a jet nozzle connecting means, and may rotate in the left-right direction in conjunction with the operation of the steering rod.

Further, in the invention described in claim 7, as in the invention described in claim 8, the jet nozzle is provided with a reverse gate capable of converting the jetting direction of the jet water flow between the rear side and the front side of the hull. The reverse gate may be connected to the steering rod through a reverse gate connecting means, and the jet water jet direction may be switched back and forth in conjunction with the operation of the steering rod. .

Furthermore, claims 1, 2, 3, 4, 5,
In the invention described in claim 6, 7 or 8, as in the invention described in claim 9, a grid for preventing foreign matter from being sucked into the outboard motor body is hingedly connected to the water intake port. May be.

Further, claims 1, 2, 3, 4, 5, 6,
In the invention described in claim 7, 8 or 9, as in the invention described in claim 10, a silencer capable of reducing exhaust noise while exhausting exhaust gas toward the atmosphere is attached to the internal combustion engine. May be.

Further, claims 1, 2, 3, 4, 5, 6,
In the invention according to claim 7, 8 or 9, as in the invention according to claim 11, the outboard motor has fins protruding below the water surface for increasing straight running stability, and the exhaust gas of the internal combustion engine. However, it may pass through the inside of the fin and be discharged into the water.

Further, claim 1, 2, 3, 4, 5, 6,
In the invention described in 7, 8, 9 or 10, claim 12
According to the invention described in 1), the protruding height of the outboard motor body from the stern plate when attached to the hull is approximately ⅔ or less of the height of the engine housing portion of the outboard motor body. Good.

[0020]

According to the first aspect of the invention, the outboard motor body having the internal combustion engine built-in extends in the left-right direction of the hull rather than in the longitudinal direction of the hull (this is referred to as the longitudinal direction). (This is the horizontal direction.) Because the length of the outboard motor is longer, the center of gravity of this outboard motor is closer to the front than the conventional long outboard motor. The outboard motor does not have to be placed on the top, resulting in a compact and low outboard motor.

According to the second aspect of the present invention, the internal combustion engine comprising a single-cylinder or in-series multi-cylinder engine is arranged inside the outboard motor body, and the reciprocating direction of the piston is substantially along the longitudinal direction of the outboard motor body. The outboard motor is compact because it is placed in a state (this is assumed to be horizontal when using a single-cylinder or in-line multi-cylinder engine), and the vertical length of the outboard motor body is short, resulting in a compact outboard motor. .

According to the invention of claim 3, the included angle is 90.
A state in which an internal combustion engine composed of a V-type engine whose temperature is less than or equal to 0 ° is arranged in the outboard motor main body so that a virtual center line passing through the center of the included angle is substantially along the longitudinal direction of the outboard motor main body (the narrow angle 90 ° The horizontal length of the V-type engine of less than or equal to (°) should be set horizontally.) Therefore, the length of the outboard motor body in the vertical direction can be short,
It becomes a compact outboard motor.

According to the invention of claim 4, the included angle is 90.
A state in which an internal combustion engine composed of a V-type engine having a temperature of 0 ° or more is inside the outboard motor body and a virtual center line passing through the center of the included angle is substantially along the lateral direction of the outboard motor body. Since it is placed horizontally in the case of a V-type engine of 90 ° or more.), The length of the outboard motor body in the vertical direction can be short,
It becomes a compact outboard motor.

According to the fifth aspect of the present invention, the internal combustion engine including the opposed engine in which the cylinder and the piston are arranged so as to face each other in opposite directions is provided inside the outboard motor body, and the reciprocating direction of the piston is outboard. The outboard motor body is compact and compact because it is arranged so that it extends substantially along the longitudinal direction of the outboard engine (this is the horizontal orientation in the case of an opposed engine). Outboard motor.

According to the sixth aspect of the present invention, the outboard motor body is fixed to the outside of the stern plate by the mounting means so as not to be rotatable, and the jet nozzle is rotatable laterally in the outboard motor body. Since it is mounted on the boat, it is only necessary to change the direction of the jet nozzle when the boat turns, and it is not necessary to rotate the laterally long outboard motor body.

According to the seventh aspect of the invention, the jet nozzle is adapted to rotate in the left-right direction in conjunction with the operation of the steering rod connected through the jet nozzle connecting means. The direction of travel of the ship can be changed to left or right simply by operating it.

According to the eighth aspect of the present invention, the reverse gate provided in the jet nozzle switches the jetting direction of the jet water flow back and forth in association with the operation of the steering rod connected through the reverse gate connecting means. Therefore, the forward / backward movement of the vessel can be switched simply by operating the steering rod.

According to the ninth aspect of the invention, since the lattice for preventing foreign matter inhalation provided at the water intake port is hinged so as to be openable and closable, the outboard motor main body is tilted up from the boat (outboard motor main body). By rotating it around the rotary shaft provided on the outboard motor main body to bring it forward.) By opening the lattice of the water intake port, maintenance such as removing foreign matter stuck in the water intake port can be easily performed.

According to the tenth aspect of the invention, since the internal combustion engine is provided with the silencer capable of discharging the exhaust gas toward the atmosphere and reducing the exhaust noise, the conventional structure for exhausting the gas into water is provided. It is possible to avoid inconveniences such as backflow of water into the engine, such as the outboard motors.

According to the eleventh aspect of the present invention, by mounting the fins on the outboard motor, the straight running stability of the hull is improved, and the exhaust gas of the internal combustion engine passes through the inside of the fins so that the water is discharged. When it is discharged to, the sound deadening effect is exerted.

According to the twelfth aspect of the present invention, the protruding height of the outboard motor body from the stern plate is approximately ⅔ or less of the height of the engine housing portion of the outboard motor body. The position of the center of gravity of the entire ship when the aircraft is installed is prevented from increasing, which not only increases stability during turning, but also secures a rear view and enhances safety during navigation. Further, since the outboard motor can be put into the trunk of the car without laying it over, it is possible to avoid the inconvenience such as leakage of oil or fuel from the inside of the engine.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a water jet type outboard motor according to the present invention will be described below with reference to FIGS. Among them, FIG. 1 is a view showing an example of a water jet type outboard motor, FIGS. 2 to 5 are views showing examples of arrangement of various engines, FIG. 6 is a view showing a state in which the outboard motor is tilted up, and FIG. FIG. 8 is an enlarged view of the water intake portion, and FIGS. 8 to 11 are views for explaining the steering operation. In the attached drawings, members having the same functions are designated by the same reference numerals.

This water jet type outboard motor 100
1 is an outboard motor mounted on the transom plate 7 so that the entire outboard motor body 130 is located behind the transom plate 7 of the hull 6, as shown in FIG. In FIG. 1, 1
30A is an engine housing portion, 140 is an outboard motor body 130
A water intake port for taking in water, 150 is a jet nozzle for ejecting a jet water flow, 160 is a muffler for discharging exhaust gas into the atmosphere while reducing exhaust noise of the engine,
Reference numeral 170 is a steering rod (tiller handle), and 180 is a clamp (mounting means) for fixing the outboard motor 100 to the transom plate 7, which are well known. In the present invention, the outboard motor body 130 is composed of an engine housing portion 130A, a water intake 140, a jet nozzle 150, a silencer 160, and the like. The steering rod (tiller handle) 170, clamp (mounting) Means) 180 is not included.

One of the characteristics of the outboard motor 100 is that, as shown in FIG. 2, the outboard motor body 130 is laterally (left and right of the hull 6) longer than the longitudinal direction (the direction along the front and rear of the hull 6). (Direction along) is that the length is longer. As shown in FIG. 2 as an example, the engine 120 is laterally placed inside the outboard motor body 130 with respect to the hull 6. Here, the engine 120 is a single-cylinder engine or an in-line multi-cylinder engine, and in this case, the horizontal placement of the engine means that the reciprocating movement direction of the piston 120A (shown by a chain line in FIG. 2) is the outboard motor main body. It means a state in which they are arranged substantially along the longitudinal direction (lateral direction) of 130.
In FIG. 2, 120B is a cylinder and 125 is a crankshaft.

Further, as shown in FIG. 3, in the case of the V-type engine 121 having a narrow included angle θ1 (90 ° or less), a virtual center line passing through the center of the included angle θ1 (shown by a chain line in FIG. 3). , With reference numeral a) are arranged substantially along the longitudinal direction of the outboard motor body 130.

Further, as shown in FIG. 4, in the case of the V-type engine 122 having a wide included angle θ2 (90 ° or more), a virtual center line passing through the center of the included angle θ2 (shown by a chain line in FIG. 4). , With the reference numeral B) are arranged substantially along the lateral direction of the outboard motor body 130.

Further, as shown in FIG. 5, in the case of the opposed engine 123, the reciprocating direction of the piston 120A (shown by the one-dot chain line in FIG. 5) is substantially along the longitudinal direction of the outboard motor body 130. Is arranged as.

That is, the outboard motor 100 can use various types of engines described above or other types of engines as an internal combustion engine, and any type of engine can be installed in the outboard motor body 130. The hull 6 is stored so that its length in the front-rear direction becomes shorter. As a result, the horizontal center-of-gravity position of the outboard motor 100 (indicated by + in FIG. 1) is similar to that of the conventional water jet type and screw type outboard motors (see FIG. The position of the center of gravity of the outboard motor is indicated by +.). Therefore, even if the entire outboard motor main body 130 is arranged behind the transom plate 7, the balance of the ship is maintained, and the outboard motor according to the present invention is applied to the hull of the conventional screw type outboard motor that is widely used. Can be attached.

As described above, as a merit of horizontally placing the engine 120 and the like with respect to the hull 6, the lower end of the transom plate 7 and the end of the water inlet 140 on the hull side are positioned at a distance l of 10 to 100 mm. It can be mentioned. The reason why the distance l is 10 to 100 mm is appropriate, because the water that has been pressed down by the bottom of the hull tries to rise upward as soon as the hull passes, and the water intake port 140 efficiently sucks the water at that timing. Because you can That is, if the distance l is too short,
The water suction port 140 cannot catch the rise of water, the water absorption efficiency is deteriorated, and there is a risk of sucking air if the distance 1 is too long. On the other hand, in the case of the conventional vertical placement, the distance 1 becomes about 150 mm or more, and the merit of the present invention cannot be obtained.

Another feature of the outboard motor 100 is that, as shown in FIG. 1, the amount of protrusion of the transom plate 7 from the upper end is significantly smaller than that of the conventional outboard motor (see FIG. 12). That is. For example, the protrusion amount can be suppressed to approximately 2/3 or less of the height of the engine housing portion 130A of the outboard motor body 130, and specifically, can be 50 cm or less. This is because the length of the outboard motor main body 130 in the direction along the front and rear of the hull 6 is shorter than before, and as described above, the horizontal center of gravity of the outboard motor 100 is different from that of the conventional outboard motor. Since the positions are similar, it is not necessary to dispose the upper portion of the outboard motor body 130 on the transom plate 7. As a result, as can be seen by comparing FIGS. 1 and 12, the vertical center of gravity of the outboard motor 100 is lower than that of the conventional outboard motor, and the outboard motor 100 is stationary and at the time of navigation, especially during turning. The effect is that stability is increased.

Here, the outboard motor main body 130 includes the engine 120 (121, 122,
123) arranged as described above may be specially designed, or the engine storage portion of the conventional outboard motor may be used with its direction rotated by 90 degrees. Therefore, the horizontal placement of the engine according to the present invention can be applied to a screw type outboard motor.

Further, in this outboard motor 100, for example, FIG.
As shown in, the outboard motor body 130 can be tilted up. The tilt-up means that the outboard motor body 1 is attached to the clamp 180 fixed to the transom plate 7.
30 is rotatably supported by a rotary shaft 185, and the outboard motor main body 130 is rotated around the rotary shaft 185 to bring the outboard motor main body 130 to a forward tilted state. When you tilt up,
Since the water inlet 140 comes out above the surface of the water, it is convenient to perform maintenance such as removing foreign matter clogged in the water inlet 140 from the ship, which is convenient. The annoyance of having to maintain the water intake by overturning the hull or diving underwater is eliminated. The present invention is, of course, applicable to an outboard motor of a type that cannot be tilted up.

As shown in FIG. 7, a grid 145 serving as a filter for preventing foreign matter from flowing into the water intake port 140 is attached to the open end of the water intake port 140. One side of this lattice 145 (the lattice 1
Since 45 is left open, it is preferable that the side located on the lower side when tilting up. ) Is hinged to the open end of the water inlet 140 via a hinge pin 146 so as to be openable and closable. The lattice 145 is fixed to the open end of the water inlet 140 by a screw member 147 such as a thumbscrew. As described above, the structure in which the grid 145 can be opened and closed dramatically improves the maintainability of the water intake port as compared with the water jet type outboard motor in which the grid is attached by the conventional bolts or the like. .

Further, in the outboard motor 100, the outboard motor body 130 and the clamp 180 are non-rotatably integrated so that the outboard motor body 130 does not rotate with respect to the hull 6. There is. As a result, the piston 12 that acts on the outboard motor body 130 to rotate the outboard motor body 130
The effect of 0 A primary vibration is eliminated. In the conventional outboard motor, the boat is turned by rotating the outboard motor body with respect to the hull. As an alternative mechanism for turning the boat, the outboard motor 100 according to the present invention includes: A direction nozzle 153 is provided at the tip of the jet nozzle 150. The directional nozzle 153 has a free end rotatably mounted in the left-right direction around the base end of the directional nozzle 153. The directional nozzle 153 turns the vessel by changing the direction of the directional nozzle 153. Thus, the outboard body 130
Is fixed to the hull 6 in a non-rotatable manner, so that when the outboard motor body is rotated, it is not necessary to provide an escape allowance for escaping the collision between the outboard motor body and the transom plate.
The outboard motor body 130 can be brought as close as possible to the transom plate 7, that is, the center of gravity can be located as close to the front as possible.

The direction nozzle 153 is connected to the steering rod 170 via jet nozzle connecting means 190,
The direction is changed in association with the operation of the steering rod 170. In this example, for example, the jet nozzle connecting means 1
90 is rotatably attached to an appropriate position of the outboard motor main body 130 by a pin 199a serving as a rotation shaft, as shown in plan views of main parts in FIGS. 8 (when traveling straight) and 9 (when turning left). And a second operating piece 19 which is integrated with the steering rod 170 and moves together, and a second operating piece 19 which is integrated with the first operating piece 191 and transmits the movement of the first operating piece 191.
2 and a push bull rod 193 that moves back and forth by the second actuating piece 192. This push bull rod 1
93 is connected to the free end of the directional nozzle 153 via a connecting piece 194, and the direction of the directional nozzle 153 is changed by the forward / backward movement of the push bull rod 193. At the time of turning right, the steering rod 170 may be turned in the direction opposite to that in FIG. In addition, 199b, 199c and 154 are all pins serving as a rotating shaft.

At the tip of the directional nozzle 153, the reverse gate 1 for switching the direction of the jet water jet ejected back and forth.
56 is attached. This reverse gate 156
Is connected to the steering rod 170 via a reverse gate connecting means 195, and changes its direction in conjunction with the operation of the steering rod 170. In this example, for example, the reverse gate coupling means 195 is fixed to the base end of the steering rod 170 and rotates together, as shown in the side views of the main parts of FIG. 10 (when moving forward) and FIG. 11 (when moving backward). The first pulley 196, the wire 197 that moves by the rotation of the first pulley 196, and the reverse gate 15
The second pulley 198 is fixed to the side of the base end portion of 6 and is rotated by the movement of the wire 197. Figure 11
As shown in FIG. 11, when the free end of the steering rod 170 is raised, the operation is transmitted to the reverse gate 156 via the first pulley 196, the wire 197 and the second pulley 198, and is directed downward (to the reverse gate in FIG. 11) to the reverse gate. Rotational force (in the direction of rotation) acts. As a result, the tip of the direction nozzle 153 is covered by the reverse gate 156, and the direction of the jet water flow is reversed. As shown in FIG. 10, when the steering rod 170 is lowered from this state, an upward rotational force acts on the reverse gate 156 via the reverse gate connecting means 195, and the reverse gate 156 rises.
Note that both 199d and 199e are pins that serve as a rotating shaft.

As described above, in the outboard motor 100 according to the present invention, since steering operations such as left and right turning and forward / backward movement can be performed only by the steering rod 170, the outboard motor 100 and the hull 6 can be operated with one hand. It is possible to operate the steering rod 170 with the other hand while gripping, which increases safety during navigation.

The steering rod 170 is rotatably and fixedly attached to the first operating piece 191. Grooves are formed in the contact surfaces of the steering rod 170 and the first operating piece 191 so that the contact surfaces mesh with each other. Then, the steering rod 170 and the first operating piece 191 are integrated with each other by tightening with a screw or a bolt in a state of being meshed with each other. Therefore, by making the steering rod 170, which is normally used in the frontward direction, face the rearward direction, the outboard motor 100 becomes more compact, which is convenient for carrying the outboard motor 100 in the trunk of the vehicle.

The muffler 160 is not particularly limited as long as it is not submerged in water at the time of navigation.
It is located on the side of 0A. And the silencer 160
Are connected to the exhaust port of the engine 120 via an exhaust pipe (not shown). As a result, the engine 12
Inconveniences such as backflow of water into 0 are avoided. The outboard motor 100 may be provided with fins for increasing straight running stability, and the exhaust gas of the engine 120 may be passed through the fins to be exhausted into the water. With such a configuration, the straight-running stability of the hull 6 is improved, and the exhaust gas of the engine 120 is discharged into the water through the inside of the fins thereof, thereby exhibiting a sound deadening effect.

According to the above embodiment, the outboard motor main body 130.
However, since the length in the horizontal direction is longer than the length in the vertical direction, and the engine 120 is horizontally placed therein, the position of the center of gravity of the outboard motor 100 in the horizontal direction is set to the front side and the center of gravity in the vertical direction is set. The position is low. Therefore, even if the entire outboard motor main body 130 is arranged behind the transom plate 7, the horizontal center of gravity is at the same position as the conventional water jet type outboard motor, and the vertical center of gravity is at the conventional water jet type outboard motor. Since it is lower than the jet type outboard motor, a compact and highly stable outboard motor can be obtained. In addition, this outboard motor 100
Since it can be attached to a general hull without requiring a specially designed hull for installation, it has high versatility and can be used instead of the conventional screw-type outboard motor.

In the above embodiment, the steering rod 1
70 by the direction nozzle 153 and the reverse gate 156
I explained the outboard motor 100 of the type that operates the
The present invention has a steering room and the like. The direction of the direction nozzle 153 is changed by turning a steering wheel (rudder) provided in the steering room and the reverse gate 156 is operated by operating a reverse lever. It can also be applied to outboard motors that can be attached to moving hulls. In that case, the jet nozzle connecting means 190 may connect the directional nozzle 153 and the steering wheel, and the reverse gate connecting means 195 may connect the reverse gate 156 and the reverse lever.

[0052]

According to the first aspect of the present invention, the outboard motor body having the internal combustion engine built therein is longer in the lateral direction than in the longitudinal direction. Since the center of gravity is located closer to the front than the conventional vertically long outboard motor, the outboard motor body need not be placed on the transom plate, resulting in a compact and low outboard motor.

According to the second aspect of the present invention, since the internal combustion engine composed of a single-cylinder engine or an in-series multi-cylinder engine is horizontally installed inside the outboard motor body, the length of the outboard motor body in the vertical direction is short. And it becomes a compact outboard motor.

According to the invention of claim 3, the included angle is 90.
Since the internal combustion engine composed of a V-type engine having a temperature of 0 ° or less is horizontally installed in the outboard motor main body, the length of the outboard motor main body in the vertical direction can be short, resulting in a compact outboard motor.

According to the invention of claim 4, the included angle is 90.
Since the internal combustion engine composed of the V-type engine having a temperature of 0 ° or more is horizontally installed inside the outboard motor body, the length of the outboard motor body in the vertical direction can be short, resulting in a compact outboard motor.

According to the fifth aspect of the invention, since the internal combustion engine composed of the opposed engine is horizontally placed inside the outboard motor body, the length of the outboard motor body in the vertical direction can be short and compact. Outboard motor.

According to the sixth aspect of the present invention, the outboard motor body is fixed to the outside of the stern plate by the mounting means so that the outboard motor body cannot rotate, and the jet nozzle can rotate in the lateral direction in the outboard motor body. Since it is attached to the ship, it is only necessary to change the direction of the jet nozzle when the ship turns, and it is possible to turn without turning the laterally long outboard motor body.

According to the seventh aspect of the invention, since the jet nozzle is adapted to rotate in the left-right direction in association with the operation of the steering rod connected through the jet nozzle connecting means, The direction of travel of the ship can be changed between left and right simply by operating it.

According to the eighth aspect of the present invention, the reverse gate provided in the jet nozzle switches the jetting direction of the jet water flow back and forth in association with the operation of the steering rod connected through the reverse gate connecting means. Therefore, it is possible to switch between forward and backward movement of the vessel simply by operating the steering rod.

According to the ninth aspect of the invention, since the lattice for preventing foreign matter suction provided at the water intake port is hinged so as to be openable and closable, the outboard motor main body is tilted up from the boat to raise the water intake port. By opening the grate, it is possible to easily perform maintenance such as removing foreign matter clogged at the water inlet.

According to the tenth aspect of the present invention, since the internal combustion engine is provided with the silencer capable of discharging the exhaust gas toward the atmosphere and reducing the exhaust noise, the conventional structure for exhausting the gas into water is provided. It is possible to avoid inconveniences such as backflow of water into the engine, such as the outboard motors.

According to the eleventh aspect of the present invention, by mounting the fins on the outboard motor, the straight running stability of the hull is improved, and the exhaust gas of the internal combustion engine passes through the inside of the fins so that the water is discharged. When it is discharged to, the sound deadening effect is exerted.

According to the twelfth aspect of the present invention, the protruding height of the outboard motor body from the stern plate is approximately ⅔ or less of the height of the engine housing portion 130A of the outboard motor body 130. It prevents the center of gravity of the entire vessel from becoming high when the outboard motor is installed, which not only increases stability during turning, but also
Rear visibility is also secured, increasing safety during navigation. Also,
Since the outboard motor can be put in the trunk of the car without laying it over, it is possible to avoid inconveniences such as leakage of oil and fuel from the inside of the engine.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a water jet type outboard motor according to the present invention.

FIG. 2 is a schematic diagram showing a first example of engine arrangement of the outboard motor.

FIG. 3 is a schematic diagram showing a second example of engine arrangement of the outboard motor.

FIG. 4 is a schematic diagram showing a third example of engine arrangement of the outboard motor.

FIG. 5 is a schematic diagram showing a fourth example of engine arrangement of the outboard motor.

FIG. 6 is a view showing a state in which the outboard motor is tilted up.

FIG. 7 is an enlarged view of a water intake portion of the outboard motor.

FIG. 8 is a diagram illustrating a steering operation of the outboard motor when it goes straight.

FIG. 9 is a diagram illustrating a steering operation when the outboard motor turns left.

FIG. 10 is a diagram illustrating a steering operation when the outboard motor is moving forward.

FIG. 11 is a diagram illustrating a steering operation when the outboard motor moves backward.

FIG. 12 is a view showing a conventional water jet type outboard motor.

[Explanation of symbols]

1 Outboard Motor 2 Engine 2A Piston 2B Cylinder 3 Outboard Motor Body 3A Engine Storage Part 4 Water Intake Port 5 Jet Nozzle 6 Hull 7 Transom Plate 100 Water Jet Outboard Motor 120, 121, 122, 123 Engine 120A Piston 120B Cylinder 125 Crankshaft 130 Outboard motor body 130A Engine storage part 140 Water inlet 145 Lattice 146 Hinge pin 147 Screw member 150 Jet nozzle 153 Directional nozzle 154 Pin 156 Reverse gate 160 Silencer 170 Steering rod 180 Clamp (mounting means) 185 Rotating shaft 190 Jet nozzle Connecting means 191 First operating piece 192 Second operating piece 193 Pushable rod 194 Connecting piece 195 Reverse gate connecting means 196 First pulley 19 Wire 198 second pulleys 199a, 199b, 199c, 199d, 199e
pin

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Soichi Ide 2nd floor, 2-1-24 Yaguchi, Ota-ku, Tokyo 1st floor, Aizawa Building KB Food Co., Ltd. Tokyo Sales Office

Claims (12)

[Claims] 1. An outboard motor body having a built-in internal combustion engine, a water intake port for taking water into the outboard motor body, and water taken into the outboard motor body through the water intake port is jetted as a jet water flow. An outboard motor equipped with a jet nozzle that is attached to the outside of the stern, wherein the outboard motor body has a lateral length along the left and right of the hull rather than a length along the front and rear of the hull. The waterjet outboard motor is characterized by a long length. 2. The internal combustion engine is a single-cylinder engine including a single cylinder and a piston or a multi-cylinder engine in which a plurality of sets of cylinders and pistons are arranged in series in a vertical direction, and the engine is inside the outboard motor body. The water jet type outboard motor according to claim 1, wherein the reciprocating movement direction of the piston is arranged substantially along the longitudinal direction of the outboard motor body. 3. The internal combustion engine is a V-type engine in which at least two sets of cylinders and pistons are arranged in two rows that are substantially V-shaped in a plan view, and the two rows of cylinders that are substantially V-shaped. The angle between the two is less than 90 °, and the engine is installed in the main body of the outboard motor as described above.
2. The water jet type outboard according to claim 1, wherein an imaginary center line passing through the center of an angle sandwiched by the two columns of V-shaped cylinders is arranged substantially along the longitudinal direction of the outboard motor body. Machine. 4. The internal combustion engine is a V-type engine in which at least two sets of cylinders and pistons are arranged in two rows having a substantially V-shaped planar shape, and the two rows of substantially V-shaped cylinders are provided. The angle between the two is 90 ° or more, and the engine is installed in the main body of the outboard motor as described above.
2. The water jet type ship according to claim 1, wherein an imaginary center line passing through the center of the angle sandwiched by the two columns of V-shaped cylinders is arranged substantially along the lateral direction of the outboard motor body. Outside machine. 5. The internal combustion engine is an opposed type engine in which at least two sets of cylinders and pistons are arranged in two rows so as to face each other in opposite directions, and the engine is provided in the outboard motor body. The water jet type outboard motor according to claim 1, wherein the reciprocating movement direction of the piston is arranged substantially along the longitudinal direction of the outboard motor body. 6. The outboard motor main body is non-rotatably fixed to the outside of the stern plate by an attachment means fixed to the outboard motor main body, and the jet engine is attached to the outboard motor main body. The water jet outboard motor according to claim 1, 2, 3, 4, or 5, wherein the nozzle is attached so as to be rotatable in the left and right lateral directions. 7. The jet nozzle is connected to a steering rod provided on the outboard motor body via a jet nozzle connecting means, and is rotated in the left-right direction in conjunction with the operation of the steering rod. The water jet type outboard motor according to claim 6, wherein: 8. The jet nozzle is provided with a reverse gate capable of converting the jet direction of the jet water flow to the rear side and the front side of the hull, and the reverse gate is connected to the steering rod through a reverse gate connecting means. 8. The water jet type outboard motor according to claim 7, wherein the water jet type outboard motor is connected to each other, and the jetting direction of the jet water flow is switched back and forth in conjunction with the operation of the steering rod. 9. A grate for preventing foreign matter from being sucked into the outboard motor body is hinged to the water intake port so as to be openable and closable.
The water jet type outboard motor according to 5, 6, 7 or 8. 10. The silencer capable of reducing exhaust noise while exhausting exhaust gas into the atmosphere is attached to the internal combustion engine.
The water jet outboard motor according to 3, 4, 5, 6, 7, 8 or 9. 11. The outboard motor has fins projecting below the surface of the water for increasing straight running stability, and exhaust gas of the internal combustion engine passes through the fins and is discharged into the water. Claims 1, 2, 3, 4, 5, 6, characterized in that
The water jet outboard motor according to item 7, 8 or 9. 12. The protruding height of the outboard motor body from the stern plate when attached to the hull is about ⅔ or less of the height of the engine housing portion of the outboard motor body. The water jet type outboard motor according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11.