JPH09263293A - Oscillation damping device for vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start moving a flywheel up to a specified rotating speed in a short time, and also hardly dispose a vessel to impact due to waves while it is sailing. SOLUTION: This device is equipped with a flywheel 4 rotated around a vertical shaft 40, a gimbal 3 rotatably holding the shaft 40 of the flywheel 4, supports 2 rotatably holding a gimbal shaft 30, an internal combustion engine 5 applying torque to the flywheel 4, and with a torque transmitting mechanism 6 transmitting torque to the flywheel 4 from the internal combustion engine 5. The torque transmitting mechanism 6 has a continuously variable transmitting function, both the internal combustion engine 5 and the torque transmitting mechanism are held by the gimbal 3, damping means 20 are provided for the supports 2, and the load of the gimbal 3 is so constituted as to be transmitted to a support setting part through the damping means 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device for ships.

[0002]

2. Description of the Related Art Conventionally, as a vibration damping device for a ship, a vibration damping device as disclosed, for example, in JP-A-7-127685 is known. In this system, both horizontal shafts of a gimbal having a flywheel and a spin motor are rotatably supported by a support fixed to the hull, and this flywheel is rotated by a spin motor directly connected to the shaft.

[0003]

In the above-mentioned device, electric power for driving the motor is required, and in a motor boat or a recreational fishing boat, a generator with a main engine does not have sufficient capacity.
Therefore, it is not possible to exert a sufficient driving force as a motor. If the driving force is small, it takes time to start the flywheel up to a predetermined rotation speed. In addition, motor boats and recreational fishing boats are vulnerable to the impact of waves during sailing, which causes a problem that the vibration control device is easily damaged.

The present invention has been made in order to solve such a conventional problem, and it is possible to start the flywheel to a predetermined rotation speed in a short time, and to avoid the shock of waves during traveling. (EN) A vibration damping device for a ship that is difficult to receive.

[0005]

According to a first aspect of the present invention, there is provided a flywheel that rotates about a vertical axis, a gimbal that rotatably holds the axis of the flywheel, and a gimbal axis that rotates about a horizontal axis. A support that holds the flywheel rotatably, an internal combustion engine that applies rotational force to the flywheel, and a rotational force transmission mechanism that transmits rotational force from this internal combustion engine to the flywheel. Has at least one of a clutch and a continuously variable transmission for intermittently transmitting the transmission, and the internal combustion engine and the rotational force transmission mechanism are held by the gimbal.

According to the invention of claim 1, a large driving force can be generated because the driving force of the internal combustion engine is utilized.
Therefore, by transmitting this driving force to the flywheel via the clutch and the continuously variable transmission, the flywheel can be brought to a predetermined rotation speed in a short time.

According to a second aspect of the present invention, the support is provided with shock absorbing means, and the load of the gimbal is transmitted to the support installation portion via the shock absorbing means.

According to the second aspect of the present invention, the load is buffered by the buffer means of the support even when an impact load is applied, such as when a large wave hits the hull, and the vibration damping device is protected.

According to a third aspect of the present invention, the support is provided with rotation restraining means for restraining the gimbal from rotating around the gimbal axis.

According to the third aspect of the present invention, it is possible to prevent the vibration damping device from excessively rotating with respect to the support.

According to a fourth aspect of the present invention, the vibration suppressing device in which the gimbal shaft is oriented in the width direction of the ship and the vibration suppressing device in which the gimbal shaft is oriented in the length direction of the ship are installed on the hull.

According to the invention of claim 4, not only the rolling (rolling) of the ship but also the pitching can be suppressed.

[0013]

1 and 2, a vibration damping device 1 includes a flywheel 4 which rotates about a vertical axis.
A gimbal 3 that rotatably holds a shaft 40 of the flywheel 4, a support 2 that rotatably holds a shaft 30 of the gimbal 3, and an internal combustion engine 5 that applies a rotational force to the flywheel 4. A rotational force transmission mechanism 6 for transmitting rotational force from the internal combustion engine 5 to the flywheel 4 is provided, and the internal combustion engine 5 and the rotational force transmission mechanism 6 are held by the gimbal 3. The vibration damping device 1 is supported by the hull so that the gimbal shaft 30 faces the ship length direction. The rotational force transmission mechanism 6 has a continuously variable transmission 69 and an automatic centrifugal clutch 60. This continuously variable transmission 69
Is a drive-side sheave 61 attached to the drive shaft 50 of the internal combustion engine 5, a driven-side sheave 62 attached to the flywheel shaft 40, and a V-belt 63 stretched over the sheaves 61, 62. I have it. This drive side sheave 61
The driven sheave 62 is composed of a fixed sheave and a sliding sheave, respectively. The input side of the automatic centrifugal clutch 60 is connected to the driven side sheave 62. The shaft 40 of the flywheel 4 is connected to the output side of the automatic centrifugal clutch 60. Therefore, when the rotation of the driven sheave 62 exceeds a predetermined value, the automatic centrifugal clutch 60 is automatically engaged, and the rotation is transmitted to the shaft 40 of the flywheel 4. On the other hand, when the rotation of the driven sheave 62 is less than a predetermined value, the automatic centrifugal clutch 6
Since 0 is not connected, the shaft 40 of the flywheel 4 is stopped.

Pipes from the fuel tank 57 and the oil tank 58, and other wirings are passed through the gimbal shaft 30 or along the gimbal shaft 30 and guided to the carburetor 59 of the internal combustion engine 5 or the like. When the gimbal 3 rotates around the gimbal shaft 30, the piping and wiring are prevented from hitting other parts and being damaged. FIG.
The clutch in 1 is an automatic centrifugal clutch, but may be a manual type.

Horizontal gimbal shafts 30 are provided on both sides of the gimbal 3, and the gimbal shafts 30 are rotatably held by bearings 22 on the support 2.
The support 2 is a lower support 23 installed on the hull 10 and an upper support 2 mounted on the lower support 23 via a cushioning material (buffering means) 20 such as rubber.
And the bearing 22 on the upper support 21.
Is installed. Therefore, the flywheel 4,
The loads of the internal combustion engine 5 and the rotational force transmission mechanism 6 are supported by the gimbal bearing 22 via the gimbal shaft 30, and the load from the gimbal bearing 22 is transmitted to the hull 10 via the buffer means 20. The vibration damping device 1 is supported by the hull so that the gimbal shaft 30 faces the width direction of the ship.

The shaft 40 of the flywheel 4 is oriented in the vertical direction, and is rotatably held by the lower and upper members of the gimbal 3. The flywheel 4 and the internal combustion engine 5 are arranged in the gimbal 3 such that the center of gravity is located below the axis connecting the gimbal shafts 30 on both sides. By thus disposing the rotational force transmission mechanism 6 on the upper side and the flywheel 4 and the internal combustion engine 5 on the lower side,
The weight is well balanced and the maintainability of the device is good. Further, instead of providing the cushioning means 20 between the upper support 21 and the lower support 23 as described above,
You may comprise a support only with the buffer means 20. In addition,
The torque transmission mechanism 6 may be configured to prevent the internal combustion engine from stopping due to the rotational torque of the flywheel 4 when transmitting power to the flywheel 4.
Instead of having both the clutch and the continuously variable transmission 69, the clutch is not a simple on / off type but a mechanism having a transition region for gradually transmitting the rotational force by sliding the clutch is adopted to continuously change the speed. It is also possible to abolish the machine.

The support may be provided with rotation suppressing means as shown in FIG. FIG. 3A shows the upper support 2.
A through hole 25 is formed below the mounting portion of the first gimbal shaft 30, and a locking hole 31 is formed on a side surface of the gimbal 3 at a position facing the through hole 25. In this configuration, the gimbal 3 can be prevented from swinging by inserting the stop pin 24 through the through hole 25 and fitting the tip end thereof into the locking hole 31. FIG. 3 (b)
Is a friction member 7 that extends the end of the gimbal shaft 30 to the outside of the bearing 22, attaches the disc 32 to this extension, and presses the outer peripheral surface of the disc 32 to generate rotational resistance in the gimbal shaft 30. Are arranged. In this configuration,
By increasing or decreasing the pressing force of the friction member 7, the gimbal 3
It is possible to continuously change the force that suppresses the swing of the.

FIG. 4 shows another example of the rotation suppressing means. A disc 36 is attached to the shaft end of the gimbal shaft 30, and a pair of arms 33 extending in opposite directions are attached to the disc 36. Each of the arms 33 has an air damper 7
1 are connected. In this configuration, the pair of air dampers 71 generate rotation resistance with respect to the arm 33 to suppress the rotation of the gimbal shaft 30. An oil-filled damper may be used instead of the air damper 71.

FIG. 5 shows still another example of the rotation suppressing means. In the bearing 22 of the gimbal shaft 30, a disc 32 is arranged at the shaft end, and the outer peripheral surface of the disc 32 is pressed to provide rotation resistance. A friction member 72 to be generated is arranged.

FIG. 6 shows still another example of the rotation suppressing means. A gear 35 is attached to the shaft end of the gimbal shaft 30,
A gear 74 attached to the shaft end of the rotary shaft damper 73 is meshed with the gear 35. In this configuration, the rotational resistance of the rotary shaft damper 73 itself and the gear 35 and the gear 74
A rotation resistance force is generated in the gimbal shaft 30 in accordance with the gear ratio of.

The above-mentioned rotation restraining means are the gimbal shaft 3
It may be provided only at one end of 0, or at both ends. A braking device may be provided at the end (upper and lower supporting portions) of the shaft 40 of the flywheel 4 so that the rotation speed of the flywheel 4 can be controlled by this braking device.

In the above structure, since the driving force of the internal combustion engine 5 is utilized, a large driving force can be generated. Therefore, by transmitting this driving force to the flywheel via the clutch and the continuously variable transmission. The flywheel 4 can be brought to a predetermined rotation speed in a short time. Further, since the vibration damping device 1 is provided with the shock absorbing means 20 and the load of the gimbal 3 is supported through the shock absorbing means 20, the shock load such as when a large wave hits the hull. Even when is applied, the load is buffered by the buffering means 20, and the vibration damping device 1 is protected. Further, when the support is provided with rotation suppressing means for suppressing the gimbal 3 from rotating around the gimbal shaft 30, it is possible to suppress the vibration damping device 1 from excessively rotating with respect to the support. You can

Further, in the case where the vibration damping device 1 in which the gimbal shaft 30 faces the ship width direction and the vibration damping device 1 in which the gimbal shaft 30 faces the ship length direction are installed on the hull 10, the flywheel 4 rotates. Gimbal 3
Of the hull 10 is suppressed by rotating around the gimbal shaft 30 extending in the ship width direction, and in the vibration damping device 1 in which the gimbal shaft 30 extends in the ship length direction, the flywheel 4 rotates. When the gimbal 3 rotates around the gimbal shaft 30 in the state where the hull is in the vertical position, the pitching of the hull is suppressed. Therefore, not only the rolling (rolling) of the hull 10 but also the pitching can be suppressed.

Since the rolling and pitching of the hull need to be suppressed especially when the boat arrives at the fishing ground and is stopped, the vibration damping device 1 needs to be operated especially in this state. Therefore, the rotation suppressing means is activated during the movement to the fishing ground, and is released when the ship arrives at the fishing ground and is stopped. Further, the rotation suppressing means may be configured to be automatically activated when the speed of the hull is above a certain level and automatically released when the speed is below the certain level.

[0025]

According to the invention of claim 1, a large driving force can be generated because the driving force of the internal combustion engine is utilized. Therefore, this driving force is transmitted to the flywheel through the clutch and the continuously variable transmission. The transmission enables the flywheel to reach a predetermined rotation speed in a short time.

According to the second aspect of the present invention, the load is buffered by the buffer means of the support even when an impact load is applied, such as when a large wave hits the hull, and the vibration damping device is protected.

According to the third aspect of the present invention, it is possible to prevent the vibration damping device from excessively rotating with respect to the support.

According to the invention of claim 4, not only the rolling (rolling) of the ship but also the pitching (pitching) can be suppressed.

[Brief description of drawings]

FIG. 1 is a front view of an apparatus showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

3 (a) and 3 (b) are perspective explanatory views each showing an example of a rotation suppressing means of the above apparatus.

FIG. 4 is a perspective explanatory view showing another example of the rotation suppressing means of the above apparatus.

FIG. 5 is a perspective explanatory view showing still another example of the rotation suppressing means of the above apparatus.

FIG. 6 is a perspective explanatory view showing still another example of the rotation suppressing means of the above apparatus.

FIG. 7 is a perspective view of an apparatus showing another embodiment of the present invention.

[Explanation of symbols]

 1 Device Main Body 2 Support 3 Gimbal 4 Flywheel 5 Internal Combustion Engine 6 Continuously Variable Transmission 7 Friction Member 10 Hull 20 Buffer Means 22 Bearing 30 Gimbal Shaft 40 Flywheel Shaft

Claims (4)

[Claims] 1. A flywheel that rotates about a vertical axis, a gimbal that rotatably holds the axis of the flywheel, a support that holds the gimbal axis rotatably about a horizontal axis, and the fly. An internal combustion engine that applies a rotational force to a wheel and a rotational force transmission mechanism that transmits a rotational force from the internal combustion engine to a flywheel are provided. The rotational force transmission mechanism includes a clutch that intermittently transmits the rotational force and a continuously variable transmission. A vibration damping device for a ship, comprising at least one of the above, and wherein the internal combustion engine and the torque transmission mechanism are held by the gimbal. 2. The support is provided with cushioning means,
The vibration damping device for a ship according to claim 1, wherein the gimbal load is configured to be transmitted to the support installation portion via the buffer means. 3. The vibration damping device for a ship according to claim 1, wherein the support is provided with rotation suppressing means for suppressing rotation of the gimbal around the gimbal axis. 4. The ship according to claim 1, wherein the vibration damping device in which the gimbal shaft is oriented in the width direction of the ship and the vibration damping device in which the gimbal shaft is oriented in the length direction of the ship are installed on the hull. Vibration control device.