JPH04358993A - Rudder unit of ship - Google Patents

Abstract

PURPOSE:To perform the forward, backward, stoppage and course change of a ship freely without changing the rotational direction of a propeller by symmetrically halving a rudder body being set up rearward on a propeller shaft center, and mailing each halved rudder part steerable separately. CONSTITUTION:A rudder body 1 being set up in a stem part 21 and in a rear position on a propeller shaft center is halved right and left, and a first split rudder plate 2 at the right is supported on a stern deck 22 via a hollow shaft body 4 free of rocking motion through a bearing. On the other hand, the second split rudder plate 3 at the left is supported by a support shaft body 6 being installed as inserted into the hollow shaft body 4, and these shaft bodies 4, 6 are made free of rotation with individual drive motors installed the stern part 21. At the time of rectilinear motion of a ship, both these split rudder bodies 2, 3 themselves are unitized as one body, and they are positioned straightly, while at the time of forward or backward movement, as shown in a virtual line, these split rudder plates 2, 3 are steered to the outside at an angle of about 115 deg. with each other, thus a water current is directed in the stern direction.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rudder device for a ship.

0002

2. Description of the Related Art Recently, some ships have two rudders attached to one propeller shaft in order to improve the maneuverability of the ship. This type of ship is often used for short shipping routes and frequent round trips.

[0003] The unique feature of this ship is that it can move forward, backward, stop, and change its course freely by keeping the rotational direction of the propeller constant and pointing the two rudders in the desired direction. be.

0004

[Problems to be Solved by the Invention] However, according to the above-mentioned ships, since there is no rudder at the rear of the propeller axis, there is a problem in that the hull efficiency is poor, and therefore the propulsion efficiency is poor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a rudder device for a ship that can solve the above problems.

[0006]

[Means for Solving the Problems] In order to solve the above problems, a rudder device for a ship according to the present invention includes a rudder body disposed at the rear on the propeller axis, and the rudder body divided into left and right halves. The vehicle is equipped with a steering device that separately steers the left and right divided rudder sections.

[0007]

[Operation] According to the above structure, by steering the two divided rudder parts outward and toward the bow side, the ship can move forward, backward, stop, etc. without changing the rotational direction of the propeller. You can change course to the left or right.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rudder device for a ship according to the present invention will be described below with reference to FIGS. 1 to 6. In FIGS. 1 to 4, reference numeral 1 denotes a rudder body disposed in the stern portion 21 at a rear position on the propeller axis, and is divided into left and right halves. For example, in FIG. 2, the first split rudder plate (split rudder section) 2 on the right side is swingably supported on the stern deck 22 via a hollow shaft 4 via a bearing 5, and the first split rudder plate (split rudder section) 2 on the left side The two-split rudder plate (split rudder section) 3 is supported by a support shaft 6 inserted through the hollow shaft 4 and supported by a support bracket 23 provided in the stern section 21 via a bearing 7. ing. In addition, Figure 3
2 shows the disassembled state of the rudder body 1.

Further, as shown in FIG. 2, the outer surface of each of the divided rudder plates 2 and 3 is formed into a gently curved surface with a concave central portion in order to change the direction of water flow. 1st above
A first
A driven gear 11 is attached, and a second driven gear 12 is attached to the upper part of the support shaft 6 that supports the second divided rudder plate 3.

A first drive motor 14 is mounted on a support member (for example, a partition wall) 24 in the stern section 21, and a first drive gear 13 that meshes with the first driven gear 11 is attached to its output shaft 14a. is installed, and the second
A second drive motor 16 is attached to which a second drive gear 15 that meshes with the driven gear 12 is attached to its output shaft 16a.

These driven gears 11, 12 and drive gear 13
, 15 and the drive motors 14, 16 constitute a steering device for each of the divided rudder plates 2, 3. Therefore, by operating each of the drive motors 14 and 16, as shown in FIG.
As shown in FIG.
It is made to be able to swing freely at an angle Θ (range of about 0 degrees to 115 degrees).

[0012] Here, the specific operation will be explained. First, when the ship is to go straight, both divided rudder plates 2 and 3 may be integrally straightened as shown by the solid line in FIG.

Next, when moving the ship astern or stopping, as shown by the imaginary lines in FIG. As shown, the water flow may be directed toward the bow side by using both divided rudder plates 2 and 3 that are opened in a fan shape.

Next, when the ship is to make a sharp turn from side to side, for example to the left, as shown in FIG.
4 and 16, move the right side first divided rudder plate 2 outward by 115
At the same time, the second divided rudder plate 3 on the left side is steered outward by 40 degrees. Then, the water current flows to the left as shown by arrow b, causing the bow to turn to the left.

Contrary to the above, when the ship is to make a sharp turn to the right, both drive motors 14, 1 are turned as shown in FIG.
6, the second divided rudder plate 3 on the left side is steered outward by 115 degrees, and the first divided rudder plate 2 on the right side is steered outward by 40 degrees. Then, the water current flows to the right as shown by arrow c, causing the bow to turn to the right.

Note that a normal course change is performed by steering the vehicle with both divided rudder plates 2 and 3 aligned, as shown by the solid line in FIG. In this way, with the rudder body placed at the rear position on the propeller axis, the two divided rudder plates are steered outward and toward the bow, so the direction of rotation of the propeller can be controlled. The ship can freely move forward, reverse, stop, and change course without changing or reducing propulsion efficiency.

In the above embodiment, a drive motor is used to steer each divided rudder plate, but a hydraulic actuator may also be used, for example.

[0018]

As described above, according to the configuration of the present invention, with the rudder body placed at the rear position on the propeller axis, the two divided rudder parts can be moved outward and toward the bow side. Since the ship can be steered, the ship can move forward, backward, stop, and change its course freely without changing the rotational direction of the propeller or reducing propulsion efficiency.

[Brief explanation of the drawing]

FIG. 1 is a side view of a rudder device for a ship according to an embodiment of the present invention.

FIG. 2 is a view taken along the line A-A in FIG. 1;

FIG. 3 is an exploded perspective view of the rudder body in the same embodiment.

FIG. 4 is a perspective view of the steering device in the rudder device of the same embodiment.

FIG. 5 is a plan view of the rudder body for explaining the operation in the same embodiment.

FIG. 6 is a plan view of the rudder body illustrating the operation of the same embodiment.

[Explanation of symbols]

1 Rudder main body 2 First divided rudder plate 3 Second divided rudder plate 4 Hollow shaft body 6 Support shaft body 14 First drive motor 16
Second drive motor 21
stern

Claims (1)

[Claims] Claim 1: A rudder body is disposed at the rear on the propeller axis, the rudder body is divided into left and right halves, and a steering device is provided for separately steering the divided rudder parts divided into left and right halves. A ship's rudder device characterized by: