JPH08207895A - Steering device for ship - Google Patents

Abstract

PURPOSE: To increase the propelling performance of a ship and also increase the steering performance of it. CONSTITUTION: A strut 10 is suspended from a stern part 9, and supported rotatably on a bearing 11. Also a vertical shaft 20 is arranged inside the strut 10 and supported on it rotatably. An outer propeller shaft 3 of which front side propeller 5 is fixed at the rear end part and an inner propeller shaft 4 of which rear side propeller shaft 6 is fixed at the rear end part are pivoted in a propeller pot 15 fixed to the end part of the strut 10. Then the lower end of the vertical shaft 20 is connected to the front end part of two propeller shafts 3 and 4 through bevel gears 18, 19, and 21 so as to form a counter- rotating propeller device 2. To the strut 10, a ring gear 12 is installed. In addition, a pinion 14 attached to the output shaft of a swing motor 13 is meshed with the ring gear 12 so as to form a swing mechanism 8. By the rotational driving of the swing motor 13 of the swing mechanism 8, the propellers 5 and 6 are rotated in horizontal plane through the strut 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus for a ship equipped with one turning propulsion device which allows a propeller to turn horizontally to operate a ship.

[0002]

2. Description of the Related Art An ordinary ship is equipped with a propeller for propelling and a rudder behind the propeller, and transmits power from a main engine to the propeller for propelling to rotate the propeller to generate thrust and operate the rudder. By doing so, the direction of propulsion is changed.

However, in this type of ship, a rudder with a larger rudder angle is required to laterally convert the thrust generated by the propeller for propelling, and a rudder with a wide rudder angle requires propulsion resistance during sailing. There is a problem that

For this reason, a ship equipped with a turning propulsion device of a type that allows the propeller for propelling to turn in a horizontal plane and can change the propelling direction by turning the propeller and omits a rudder has appeared.

Among the ships equipped with such a turning propulsion device, only the outboard motors shown in FIGS. 3 and 4 are known as those equipped with only one turning propulsion device.

The outboard motor shown in FIGS. 3 and 4 has an engine a.
A power transmission shaft (not shown) for transmitting power from the engine is connected to an input shaft equipped at the upper end of the propulsion device b through a universal joint (not shown). The propulsion device b is provided with a rotation provided on the mounting collar c. By tilting the steering arm e, which is connected to the lower end of the shaft d and connected to the upper end of the rotary shaft d, in the left-right direction via a steering cable (not shown), the propulsion device b turns left and right at the same angle as the tilt angle of the steering arm e. A hole is formed in the hull transom f, the hull transom f is passed through the hole, and the mounting collar c is attached to the hull transom f so that the hull transom f can be installed on the hull. In the propeller b, a propeller shaft (not shown) is rotatably supported in a propeller pot g, and a propeller h is fixed to the rear end of the propeller shaft.
Further, a vertical axis for power transmission is connected to the front end portion of the propeller shaft and the input shaft via a worm gear or the like, and the propeller h is rotated by the power from the engine a to generate thrust. . i is the bottom of the ship.

[0007]

However, in the case of the outboard motor shown in FIGS. 3 and 4 in which one hull is equipped with one turning propulsion device, the steering arm e is operated to change the propulsion direction of the hull. When changing to the left or right direction, the tilt angle of the steering arm e is about 30 degrees to 35 degrees to the left or right, and the horizontal turning angle of the propeller h is 30 degrees to 35 degrees to the left, or to the right. It has a very small turning angle of 30 to 35 degrees, and it is not possible to turn 180 degrees or more, and there is a problem that the maneuverability is poor.

Therefore, according to the present invention, as a ship equipped with only one turning propulsion device in the ship, the marine vessel maneuvering performance can be improved, and the propulsion performance can also be improved by reversing the propeller. It is intended to provide what you have done.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is arranged such that the upper end portion of one strut having a propeller pot fixed to the lower end of the hull is rotatably attached to the hull. The struts can be rotated by a turning drive installed inside the hull, and the input shaft is rotatably supported inside the hull so that the power is transmitted from the input shaft to rotate. The vertical shaft is rotatably supported inside the strut, and further, in the propeller pot, a propeller shaft having a propeller fixed to the rear end is rotatably supported, and the rotational force of the vertical shaft is The lower end of the vertical shaft is connected to the propeller shaft so that it can be transmitted to the propeller shaft, and the power from the input shaft is transmitted to the vertical shaft to rotate the propeller and generate propulsive force, and the swing drive device A main engine equipped with a revolving propeller having a contra-rotating propeller in which the propeller is rotated horizontally to steer by rotating the engine. The structure is connected to.

[0010]

When the turning drive device is driven to rotate the strut, the propeller pot fixed to the lower end of the strut turns, so that the propeller can turn 180 degrees or more in the horizontal plane, and the propelling of the ship. The direction can be changed arbitrarily. With the counter-rotating propeller system, the propulsion performance of the ship can be improved.

[0011]

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

1 and 2 show, as an embodiment of a steering apparatus for a ship according to the present invention, a front propeller 5 and a rear propeller are respectively provided at rear end portions of an outer propeller shaft 3 and an inner propeller shaft 4 having a double structure. 6 is fixed, and the double propeller device 2 in which the front propeller 5 and the rear propeller 6 are rotated in opposite directions by the rotational driving force of the diesel main engine 7 to generate propulsive force. A turning propulsion device 1 configured to be turned horizontally by a turning mechanism 8 and steered is configured, and the turning propulsion device 1 is installed in one ship.

More specifically, as shown in the outline of an example in FIG. 2, the swivel-type propulsion apparatus 1 has an upper end portion of one strut 10 suspended from a stern portion 9 located on the center line of the hull. The struts 10 are rotatably supported in the portion 9 via bearings 11, and the ring gear 12 is attached to the outer peripheral surface of the upper end portion of the strut 10.
And a swing motor 13 as a swing drive device is fixedly installed in the stern 9, and the pinion 14 attached to the tip end of the output shaft of the swing motor 13 is meshed with the ring gear 12 to drive the swing motor 13. The swivel mechanism 8 is constructed by which the strut 10 can be rotated by
Further, a streamlined propeller pot 15 is fixed to the lower end portion of the strut 10, and the propeller pot 15 is fixed.
Inside, the outer propeller shaft 3 with the front propeller 5 fixed to the rear end portion and the inner propeller shaft 4 with the rear propeller 6 attached to the rear end portion are arranged in a double manner to form bearings 16,
17 to form a contra-rotating propeller device 2 rotatably supported by the bevel gears 18 and 19 mounted on the front ends of the outer and inner propeller shafts 3 and 4, respectively, while vertically mounted in the one strut 10. A bevel gear 21 is attached to a lower end portion of a vertical shaft 20 which is arranged and rotatably supported, and a bevel gear 21 at the lower end of the vertical shaft 20 and a bevel gear 18 attached to the outer and inner propeller shafts 3 and 4; 19
Are engaged with each other and the vertical shaft 20 is rotated so that the two propeller shafts 3 and 4 rotate in mutually opposite directions. An input shaft 23 connected to the main engine 7 via an intermediate shaft 22 is rotatably installed inside the stern portion 9, and the inner diameter of the input shaft 23 is set to be slightly smaller than the outer diameter of the input shaft 23. The hollow shaft 24 for forward rotation and the hollow shaft 25 for reverse rotation, which are made larger and have bevel gears 26 and 27 respectively attached to one end, are fitted to each other, and the bevel gears 26 and 27 of the two hollow shafts 24 and 25 are set to the above-mentioned. The hollow shafts 24, 25 are supported by bearings 29, 30 while meshing with a bevel gear 28 attached to the upper end of the vertical shaft 20, and further in the gap between the outer peripheral surface of the input shaft 23 and the hollow shaft 24 for forward rotation. The forward rotation clutch 31 and the reverse rotation clutch 32 are respectively inserted in the gap between the outer peripheral surface of the input shaft 23 and the reverse rotation hollow shaft 25, and the reverse rotation clutch 32 is disengaged before the forward rotation clutch. By installing 31 the counter-rotating propeller 2 is rotated forward, on the contrary, the contra-rotating propeller unit 2 by turn off the clutch 31 of the forward rotation add clutch 32 for reverse rotation is configured such that so as to reverse.

In the above, the forward rotation clutch 31 is used.
An interlock mechanism is provided between the clutch 32 for reverse rotation and the clutch 32 for reverse rotation so that both clutches do not fit at the same time. When either one clutch is engaged, the other clutch is engaged. Is in an idle state.

When the swivel-type propulsion device 1 is driven to generate a propulsive force, a hollow shaft 24 for forward rotation and an input shaft 23 are provided.
A forward rotation clutch 31 interposed between and is fitted (clutch “on”) to integrate the forward rotation hollow shaft 24 and the input shaft 23. In this case, since the hollow shaft 25 for reverse rotation is in an idling state together with the bevel gear 27, the driving force from the main engine 7 is the input shaft 23, the hollow shaft 24 for forward rotation, and the bevel gear 2.
6, transmitted to the vertical shaft 20 via the bevel gear 28 at the upper end of the vertical shaft 20, and further from the vertical shaft 20 to the bevel gears 21, 1
After being transmitted to the outer and inner propeller shafts 3 and 4 via 8 and 19, the front propeller 5 and the rear propeller 6 are rotated in opposite directions to generate propulsive force of the ship.
At this time, since the contra-rotating propeller device 2 is used, the propulsion performance of the ship can be significantly improved.

When the propulsive force is generated, the clutch 31 for forward rotation is disengaged (clutch "disengaged"), and then the clutch for reverse rotation is interposed between the hollow shaft 25 for reverse rotation and the input shaft 23. When 32 is fitted, the hollow shaft 24 for normal rotation is in an idling state, and the driving force from the main engine 7 is transmitted to the vertical shaft 20 via the input shaft 23, the bevel gears 27, 28, and the vertical shaft 20. Is reversely rotated, and is further transmitted from the vertical shaft 20 to the propeller shafts 3 and 4 so that the propellers 5 and 6 are rotated in the opposite direction to the above-described direction, so that the ship can be propelled rearward.

When it is desired to change the course of a ship during navigation, the turning motor 13 of the turning mechanism 8 is normally or reversely rotated to rotate the strut 10, and the propellers 5 and 6 are rotated about the vertical axis 20. Turn on the required angle on a horizontal plane. As a result, the direction of the propeller wake, which is the propulsive force of the ship, can be changed to the propulsion direction of the ship.

In this case, since the propellers 5 and 6 can be turned by 90 degrees or more in the left and right sides of the hull, the full propulsive force can be generated even in the lateral direction of the hull. Therefore, if a bow thruster (not shown) is installed on the bow and the bow thruster and the turning propulsion device 1 are used in combination, lateral movement of the ship becomes possible and maneuverability at the time of berthing and berthing in the port is improved. It can be dramatically improved.

In the present invention, as described above, the propellers 5 and 6 can be horizontally swung, and the propellers 5 and 6 can be rotated in the reverse direction. Therefore, it is not necessary to provide a thruster, and therefore, the propulsion resistance is reduced and the directional deviation of the propulsion force is eliminated when the boat is traveling straight, and the vibration force generated in the propellers 5 and 6 is reduced. The ship has low vibration and low noise, improving the habitability inside the ship and
The maintainability of various equipment such as the hull and outfitting is improved.

In the above embodiment, the case where the diesel main engine 7 is used as the source of the rotational driving force of the propellers 5 and 6 is shown. However, the drive source is a motor, a gas turbine, a steam turbine, a hydraulic motor, or the like. It is needless to say that the number of units can be changed as appropriate and that the present invention can be variously changed without departing from the scope of the invention.

[0021]

As described above, according to the steering apparatus for a ship of the present invention, the propeller pot is fixed to the lower end of the strut which is hung from the stern of the ship and rotatably supported. In addition, the outer propeller shaft with the front propeller fixed to the rear end and the inner propeller shaft with the rear propeller fixed to the rear end are doubly supported so that they can rotate freely. The lower end of the vertical shaft, which is received and rotatably supported, is connected to the outer and inner propeller shafts via a bevel gear, and the propeller is rotated through the input shaft, the vertical shaft, and the propeller shaft to obtain propulsion force. The above propulsion device is equipped with one swivel propulsion device capable of swiveling by rotating the strut by the swivel drive device, and the swivel propulsion device is swung to change the thrust direction. Since it is configured to steer, the course of the ship can be arbitrarily changed by changing the direction of the fixed propeller, thus rudder is unnecessary and the propulsion resistance of the ship is reduced and the ship goes straight. In this case, the directional deviation of the propulsion force of the ship does not occur, so the ship maneuvering performance can be improved without impairing the propulsion performance of the ship, and the counter-rotating propeller device is used. As a result, the propulsion performance of the ship can be significantly improved, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a steering apparatus for a ship according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a turning type propulsion device which is the main feature of the present invention.

FIG. 3 is a schematic side view showing an example in which one conventional turning propulsion device is attached to a ship.

FIG. 4 is a schematic plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swing-type propulsion device 2 Double reversal propeller device 3 Outer propeller shaft 4 Inner propeller shaft 5 Front propeller 6 Rear propeller 8 Swing mechanism 9 Stern 10 Strut 11 Bearing 12 Ring gear 13 Swing motor 14 Pinion 15 Propeller pot 18,19 Umbrella Gear 20 Vertical axis 21 Bevel gear

Claims (1)

[Claims] 1. An upper end portion of one strut that hangs down from a position on a center line of the hull and has a propeller pot fixed to a lower end thereof is rotatably supported on the hull, and a strut drive device installed in the hull allows the strut to move. A vertical shaft, which is rotatable and has an input shaft rotatably supported in the hull, is adapted to be rotated by receiving power from the input shaft and rotatably supported inside the strut. Further, in the propeller pot, a propeller shaft having a propeller fixed to the rear end is rotatably supported, and the lower end of the vertical shaft is connected to the propeller shaft so as to transmit the rotational force of the vertical shaft to the propeller shaft. , The power from the input shaft is transmitted to the vertical shaft to rotate the propeller to generate propulsive force, and the turning drive device rotates the strut to horizontally rotate the propeller. A steering apparatus for a ship, comprising a turning propulsion device having a contra-rotating propeller configured to be steered, and the turning propulsion device being connected to a main engine mounted in one hull.