JPS625999Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a remote control device for a prime mover, and more particularly to a remote control device for a marine diesel engine (hereinafter referred to as "marine main engine") mounted on a small fish boat or the like.

Conventionally, this type of remote control device is configured to drive a motor using a remote control unit connected to a cable, and adjust the fuel injection amount to the prime mover by moving the engine's speed governor lever with a wire. The governor lever is biased by a spring or the like in order to perform speed control operation, so when the speed control governor lever is activated, the reaction force of the governor lever is applied to the remote drive unit via the wire.
Conventionally, a worm reducer that does not reverse rotation is used to absorb the reaction force from the governor lever.

By the way, the function of preventing reverse rotation in a worm speed reducer is based on the contact friction force between the worm and the tooth surface of the worm gear. may reverse, and it is difficult to say that it will never reverse, especially when vibrations are applied.

In addition, the transmission efficiency of a worm reducer is considerably lower than other reducers made of spur gears, etc., and in order to obtain the same drive torque, the motor output must be increased by the amount that the efficiency is lower. However, there are problems such as an increase in the size of the motor and an increase in power consumption, and it cannot be said to be sufficient for use in small ships where installation space is limited.

The present invention was developed in view of the above, and aims to reliably receive the reaction force from the speed governor lever with a simple mechanism, increase transmission efficiency, and use a small motor. It is an object of the present invention to provide a remote control device for a main engine of a marine vessel, which is equipped with an electromagnetic brake that operates to lock the drive mechanism when the motor is stopped, on a drive mechanism provided with a drive arm.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows the configuration of a remote control device according to the present invention. A control device main body 1 is provided in a wheelhouse inside a ship, and the control device main body 1 is equipped with a governor handle 2 and a clutch handle 3. The main body 1 is designed to control the speed of the main marine engine and to switch clutches (omitted) for forward and reverse movement.

Further, a remote control section 5 is connected to the control device main body 1 via a cable 4 connected by a connector, and the speed control, clutch switching, and rudder angle control of the main engine can be performed by switching the remote control section 5. has been done. Therefore, even outside the wheelhouse,
The remote control unit 5 allows the ship to be operated.

The remote control of the main engine by the governor handle 2 or the remote control unit 5 is converted into the movement of the drive arm 6 within the control device main body 1, and the movement of the drive arm 6 is controlled by the push-pull wire 7 to control the speed control axis of the main engine. The speed control shaft 8 operates the fuel injection device of the main engine to change the fuel injection amount, thereby controlling the rotation of the main engine. Also, the governor lever 9 has a spring 10
The push-pull wire 7 is configured to generate a resistance against the rope movement so that the push-pull wire 7 can be returned to its initial position. Incidentally, the governor handle and the clutch handle may be provided in the middle of the push-pull wire.

FIG. 2 shows an embodiment of the present invention in the form of a mechanical block, and the drive mechanism provided within the control device main body 1 is clarified. Note that the connection to the manual mechanism using the governor handle is omitted, and the same parts as in FIG. 1 are denoted by the same reference numerals.

The drive mechanism for the drive arm 6 provided in the control device main body 1 consists of a motor 11 and reducers 12 and 13 connected to the output shaft of the motor 11, and controls the rotation of the motor 11 by several rpm of the drive arm 6. Decrease the speed so that the rotation speed is the same. In addition, an electromagnetic brake 16 is provided on the spur gear 15 that meshes with the spur gear 14 that is attached to the connecting shaft between the reducers 12 and 13, and is adapted to absorb the reaction force applied to the drive system by the spring 10 of the governor lever 9. There is. Although it is preferable to use model number CS-20 series manufactured by Harmonic Drive Systems Co., Ltd. as the reduction gears 12 and 13 in order to achieve miniaturization, it is preferable to use a reduction gear other than a worm using a spur gear train or the like. It's fine if it's a machine.

The motor 11 and electromagnetic brake 16 of the drive mechanism configured as described above are controlled by the control output of a controller 17 activated by a switch operation of the remote control unit 5, and a forward rotation or reverse rotation signal is applied to the motor 11. At this time, the electromagnetic coil 16a of the electromagnetic brake 16 is deenergized and the braking force is released, and when the drive signal to the motor 11 is cut off, the electromagnetic coil 16a is energized to attract and stop the spur gear 15. Then, via the spur gear 16, the reducer 12,
13.

In this way, since the electromagnetic brake 16 locks the reducers 12 and 13 when the motor 11 stops, the spring 1 of the governor lever 9
Even if it receives a reaction force due to zero, the drive mechanism does not reverse, and the rotational speed of the main engine adjusted by the remote control unit 5 can be maintained.

Furthermore, as is clear from FIG. 2, the electromagnetic brake 16 is provided at a position where the rotation speed is relatively high between the reducers 12 and 13, and when the drive current to the motor 11 is cut off, The motor 11 has a sufficiently high responsiveness to perform brake operation even against high-speed inertial rotation, so when the drive current to the motor 11 is cut off, the drive system can be reliably stopped without producing excess rotation. can. Furthermore, since the rotational speed of the electromagnetic brake 16 is high, the torque at the mounting position of the electromagnetic brake 16 is sufficiently small compared to the torque at the drive arm 6. Therefore, the braking suction force of the electromagnetic brake can be small, and a small electromagnetic brake 16 can be used. be able to. The fact that the electromagnetic brake 16 can be made smaller is also advantageous in that it can reduce the influence of leakage magnetic flux on a magnetic compass or the like installed near the main body of the control device. On the other hand, regarding the reaction force applied to the electromagnetic brake 16 by the spring 10 of the governor lever 9, the reaction torque is attenuated via the reducer 13, so even if the electromagnetic brake 16 is downsized, the reaction force can be sufficiently absorbed. Can be done.

Figure 3 shows another embodiment of the present invention.
The electromagnetic brake 1 is applied to the electromagnetic brake 1 through a spur gear 14 that is attached to the output shaft of the motor 11 and a spur gear 15 that meshes with the spur gear 14.
6 is provided, and an electromagnetic brake is applied directly to the output shaft of the motor 11. In this embodiment, the rotation speed of the spur gear 15 is
Since the rotation is at a high speed corresponding to the rotation speed of 1, the braking torque itself can be further reduced compared to the case shown in FIG.

Of course, the installation position of the electromagnetic brake 16 is not limited to the above embodiment, and it can be installed at any appropriate drive reduction stage from the motor 11 to the drive arm 6.

In addition, as is clear from the above examples, since the reduction gear uses a harmonic drive reduction gear or a reduction gear with a spur gear train, the transmission efficiency is extremely high compared to the conventional worm reduction gear, and the reduction Since the loss due to
Therefore, the control device main body 1 shown in FIG. 1 can be made smaller and lighter.

In addition, although the above-mentioned embodiment took a marine motor as an example, it is not limited to this, and can be applied as it is as a remote control device for a motor used for an appropriate purpose.

As explained above, the marine main engine remote control device of the present invention is equipped with an electromagnetic brake in the drive mechanism whose drive source is a motor that remotely controls the rotation of the main engine using a cable-connected portable operation unit, and controls the speed governor lever. The spring absorbs the reaction force applied to the drive mechanism and is configured to reliably prevent the motor from returning due to the reaction force when the drive current is cut off, allowing rotation from either direction of the main axis or slave axis. Since it becomes possible to use a speed reducer and high transmission efficiency is achieved, the motor as a drive source can be downsized, making it possible to make the device smaller, lighter, and even lower in power consumption. The electromagnetic brake locks the drive mechanism, making it possible to more reliably control the main engine rotational speed when the governor lever is operated.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the device configuration of the present invention, Fig. 2 is a mechanical block diagram showing one embodiment of the present invention, and Fig. 3 is a mechanical block diagram showing another embodiment of the present invention. be. 1... control device body, 2... governor handle,
3...Clutch handle, 4...Cable, 5...
...Remote control unit, 6...Drive arm, 7...Push-pull wire, 8...Speed control axis, 9...
Governor lever, 10... spring, 11... motor,
12, 13...Reducer, 14,15...Spur gear,
16... Electromagnetic brake, 16a... Electromagnetic coil.

Claims (1)

[Scope of Claim for Utility Model Registration] A drive mechanism that transmits the rotational force of a motor from the output shaft side to a drive arm via a rotatable spur gear or a harmonic reduction gear, and the drive arm is used to control the speed of a marine main engine. In a remote control device for a marine main engine, which is connected to a governor lever by a wire, and the governor lever is remotely controlled by the motor using a remote control unit that is removably connected by a cable, the present invention prevents return due to a reaction force received from the governor lever via the wire. A marine main engine remote control device characterized in that an electromagnetic brake is provided in the drive mechanism.