JP2000185693A - Double steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide high lift and low lift, by maintaining a flap steering function that rotates a sub steering plate with rotation of a main steering plate by an angle different form the main steering plate constrained to a link mechanism, and simultaneously rotating the sub steering plate independently. SOLUTION: A hinge shaft 22 is rotatably and vertically placed at the back of a main steering plate 10 with similarly penetrating through a steering head machine 14, a sub steering plate 12 is mounted to this hinge shaft 22 in a state that it connects to the back of the main steering plate 10. When a hydraulic cylinder is expanded or shrunk, a link pin 28 moves from a neutral position to a certain position, following this a link fork 26 rotates about the hinge shaft 22, and therefore the sub steering plate 12 rotates by a steering angle independently of the main steering plate 10. As a result, rotation of only the sub steering plate 12 can provide a steering function of low lift, and a flap steering function of high lift can be provided by the main steering plate 10 and the sub steering plate 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dual rudder device having excellent steering performance.

[0002]

2. Description of the Related Art A sub rudder plate is mounted on a hinge shaft rotatably supported at the rear of a main rudder plate rotatable about a rudder shaft, and a link mechanism is provided between the sub rudder plate and the main rudder plate. A rudder device in which the auxiliary rudder plate is restrained by the link mechanism by the rotation of the main rudder plate and rotates at a different angle from the main rudder plate is known as a so-called flap rudder. In this case, the auxiliary rudder plate (flap) swings in a direction to further increase the swing of the main rudder plate, and thus has a reputation as a rudder device for generating high lift.

[0003]

However, in the case of a corrective steering for a target direction, such as when a ship is sailing with an autopilot, steering with such a high lift rudder will cause the target direction to pass. In order to correct this, it will be in a state of sailing constantly wobbling. For this reason, situations such as wasteful consumption of fuel, delay in reaching the destination, poor ride comfort, and exhaustion of equipment are caused. The present invention solves such a problem, and has a high lift,
It is designed to output both low lift.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention provides an auxiliary steering wheel mounted on a hinge shaft rotatably supported at the rear of a main steering wheel rotatable about a rudder shaft. The shaft is extended above the sub rudder plate, and a link fork having a front portion formed in a fork groove is attached thereto, and a link mechanism is provided in which a link pin provided in a fixed position in the fork groove is inserted. In a rudder device that exhibits a flap rudder function that rotates the sub rudder plate at an angle different from that of the main rudder plate restrained by the link mechanism, the sub rudder plate can be rotated independently while maintaining the flap rudder function A double rudder device is provided.

According to the dual rudder system described above, when low lift is sufficient, as in the case of autopilot running, the main rudder can be fixed at a rudder angle of 0 and only the sub rudder can be steered. When a high lift is required as in the case of emergency or emergency avoidance, the position of the link pin may be fixed to exert the flap steering function. Further, also in this case, since the auxiliary rudder can be steered in the direction of increasing or decreasing the steering angle of the main rudder, the lift can be adjusted in any manner.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings, taking an example in which a rudder plate is viewed directly from the bottom of a ship in order to minimize water resistance. FIG.
FIG. 2 is a partial sectional side view of the double rudder device according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a sectional view taken along line AA of FIG. And a rudder plate 12. At the top of the main rudder plate 10, a rudder 14 having a circular shape in a plan view is provided. The rudder 14 is rotatably supported by a bearing 18 on a bottom wall 16 of the hull.

In this case, the lower surface of the rudder disc 14, that is, the top of the main rudder plate 10 is set to have substantially the same line as the lower surface of the bottom wall 16, and, in addition, a link for steering the sub rudder plate 12, which will be described later. The mechanism and the like are provided in the hull above the rudder disc 14.
Therefore, the link mechanism and the like do not exist in the water, and embody a high-efficiency steering device with extremely low water resistance. A rudder shaft 20 integrated with the main rudder plate 10 is vertically provided through the center of the rudder disc 14, and a main rudder plate driving mechanism (rotating the main rudder plate to an upper exposed portion thereof). (Not shown) is attached.

A hinge shaft 22 is vertically provided at the rear of the main rudder plate 10 so as to be rotatable through the rudder head 14.
The auxiliary rudder plate 12 is attached to the hinge shaft 22 so as to be continuous to the rear of the main rudder plate 10. Secondary rudder plate 1 in this case
The wing area of No. 2 is considerably smaller than the wing area of the main rudder plate 10.

A link mechanism 2 for controlling the rotation of the auxiliary rudder plate 12 when the main rudder plate 10 is rotated is connected to the hinge shaft 22.
4 are provided. The link mechanism 24 according to the present embodiment includes a link fork 26 and a link pin 28. The link fork 26 has a rear portion fixed to the hinge shaft 22 and a front portion formed with a fork groove 30 having an open front end. The link pin 28 is inserted into the fork groove 30, and its upper and lower parts are oriented in a direction perpendicular to the hull axis (hereinafter, referred to as a left-right direction) by a bracket 32 having both ends fixed to the bottom wall 16 or the like. Erect upper support plate 3
4 and the lower support plate 36 are slidably supported in the left-right direction.

More specifically, long holes 38, 40 are formed in the upper support plate 34 and the lower support plate 36, respectively, in the left-right direction, and the link pins 28 are inserted through the long holes 38, 40 to form upper and lower surfaces. And the abutment plates 42a, 42b, 44a, 44b are applied thereto. Such contact plates 42a, 42
The reason for using b, 44a, and 44b is to enhance the slidability of the link pin 28. On the other hand, hydraulic cylinders 46, 48 are attached to the end side of the upper support plate 34 and the like, and the rods 46a, 48a are pivotally attached to the corresponding plates 42a, 42b.
In the case of the present example, the upper support plate 34 is supported by a rear bracket 50 fixed to the bottom wall 16 or the like to enhance its rigidity.

FIG. 4 is an explanatory view of the case where the auxiliary rudder plate 12 is rotated by the above configuration.
By expanding and contracting 6, 48 (if one expands, the other shrinks in synchronism with it.
The use of two 48 is for the purpose of providing a margin for the output, and of course, one may be used.
8 moves from the neutral position (a) to a certain position (b), and the link fork 26 pivots about the hinge shaft 22 accordingly, so that the auxiliary rudder plate 12 is independently controlled by the main rudder plate 19. Rotates by an angle α.

On the other hand, when the link pin 28 is fixed at the neutral position (a) and the main rudder plate 10 is rotated, the link operates as a conventional flap rudder. FIG. 5 is an explanatory view showing this. When the rudder shaft 20 is driven to rotate the main rudder plate 10 by the rudder angle β, the hinge shaft 22 moves from the neutral position (c) to a certain position (d). Therefore, the auxiliary rudder plate 12 rotates at a steering angle γ connecting the position (d) and the link pin 28. In this case, since only the auxiliary rudder plate 12 can be rotated by operating the hydraulic cylinders 46 and 48, for example, it is also possible to rotate to the steering angle δ.

FIG. 6 is a plan view of a main part of another example of moving the link pin 28, and FIG. 7 is a side view of the main part.
The pivot plate 54 is rotatably attached to a support 52 standing upright from the bottom wall 16 or the like, and the link pin 28 is hung down from the pivot plate 54 and inserted into the fork groove 30 of the link fork 26. The plate 54 is rotated by hydraulic cylinders 46 and 48. According to this example, there is an advantage that the structure for moving the link pin 28 is simplified.

FIG. 8 shows that the auxiliary rudder 1 is rotated by rotating the hinge shaft 22.
FIG. 5 is a partial cross-sectional side view of still another example of steering the steering wheel 2, in which a mounting member 58 that rotatably holds the hinge shaft 22 with a bearing 56 is mounted on the rudder 14. , A rotary motor 60 such as a hydraulic motor is attached to a mounting member 58 so that the hinge shaft 22 is directly rotated.
The link mechanism is substantially unnecessary. As a result, when a drive command is given to the rotary prime mover 60, the sub rudder 1
2 rotates to a desired angle.

In a general flap rudder, the auxiliary rudder plate 12 is rotated at a steering angle approximately twice as large as the rudder angle of the main rudder plate 10. In order to exert the above, the rotation angle of the rotary motor 60 is output with respect to the steering angle of the main rudder plate 10 so as to satisfy the above relationship. Of course, the auxiliary rudder plate 12 may be rotated at other angles. When the auxiliary rudder plate 12 is rotated by a certain angle,
Since it is necessary to maintain the angle due to the resistance of water and the like, the rotary type prime mover 60 employs a brake-equipped prime mover. If a worm mechanism is used as the reduction mechanism,
There is no reversal from the load side.

In addition, in this embodiment, some brackets 62 are extended rearward of the main rudder plate 10 so that the auxiliary rudder plate 1
2 is rotatably supported. Further, the above-mentioned hinge shaft 22 is divided into several parts in the vertical direction, so that the ease of assembly is ensured. Further, the front and rear widths of the main rudder plate 10 and the sub rudder plate 12 are made narrower as going downward, and the strength is taken into consideration. In addition, the auxiliary rudder plate 12 is provided with several end plates 64 projecting horizontally to secure the strength and to achieve laminar flow of water.

According to each of the above examples, only the sub rudder plate (hereinafter referred to as the sub rudder) 12 can be rotated to exhibit the function of the rudder with a low lift, and the main rudder plate (hereinafter referred to as the main rudder plate). It is also possible to exhibit the function of a high-lift flap rudder by the main rudder 10 and the sub rudder 12. Therefore, the selection can be made according to the required rudder function. As described above, the low lift rudder is most suitable for autopilot running, etc., and FIG. 9 shows an operation flow thereof.

According to this, when the traveling by the sub rudder is selected, the steering angle of the main rudder is set to 0 and the autopilot is turned on. Then, under the condition that the rudder angle of the main rudder is 0 and the autopilot is on, the marine vessel runs by operating only the drive mechanism (hydraulic cylinder) of the sub rudder. Therefore, the hull does not zigzag while traveling in the target direction due to the low lift of the secondary rudder.

On the other hand, when some emergency steering command is issued and a high-lift steering performance is required, the sub- rudder is returned to the neutral position on the condition that the main rudder is being steered, and the driving mechanism of the sub-rudder is off. At the same time, the drive mechanism of the main rudder is turned on, and the steering by turning the main rudder is enabled on condition that the autopilot is turned off. Therefore, the hull can be sharply steered by receiving high lift by the main rudder and the sub rudder. In addition, in this case, the sub-rudder drive mechanism can be turned on to steer the sub-rudder, so that the lift can be further adjusted. In the above operation flow, the operation of * is performed automatically, and the other operations are performed manually.

[0020]

As described above, the present invention has been described above. In other words, when low lift is required as in the case of autopilot cruising, the main rudder is fixed to the rudder angle 0 and only the sub rudder is used. By steering, zig-zag cruising is abolished, and the coursekeeping ability is increased. On the other hand, at the time of approaching or leaving the shore or at the time of avoiding an emergency, by acting as a flap rudder by the main rudder and the sub rudder, a high lift is exhibited and steering performance is enhanced.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view of a double rudder device showing an example of the present invention.

FIG. 2 is a partially sectional plan view of a dual rudder device showing an example of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2 showing an example of the present invention.

FIG. 4 is an explanatory diagram showing an operation state of a dual rudder device showing an example of the present invention.

FIG. 5 is an explanatory diagram showing an operation state of a dual rudder device showing an example of the present invention.

FIG. 6 is a main part plan view of a dual rudder device showing another example of the present invention.

FIG. 7 is a side view of a main part of a dual rudder device showing another example of the present invention.

FIG. 8 is a partial cross-sectional side view of a main part of a dual rudder device showing another example of the present invention.

FIG. 9 is an operation flowchart of a dual rudder device showing another example of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Main rudder plate 12 Secondary rudder plate 14 Rudder plate 16 Bottom wall 20 Rudder shaft 22 Hinge shaft 24 Link mechanism 26 Link fork 28 Link pin 30 Fork groove

Claims (4)

[Claims] 1. A sub rudder plate is mounted on a hinge shaft rotatably supported at a rear portion of a main rudder plate rotatable about a rudder shaft, and the hinge shaft is extended above the sub rudder plate to form a front portion. A link fork formed in the fork groove is attached, and a link mechanism in which a link pin provided fixedly in the fork groove is provided, and the sub rudder plate is restrained by the link mechanism by the rotation of the main rudder plate. A dual rudder device wherein a sub rudder plate is independently rotatable while maintaining a flap rudder function, in a rudder device exhibiting a flap rudder function of rotating at a different angle from the main rudder plate. 2. The dual rudder device according to claim 1, wherein the auxiliary rudder plate is rotated by rotating the link fork about the hinge axis by moving the link pin. 3. The dual rudder device according to claim 1, wherein the auxiliary rudder plate is rotated by directly rotating the hinge shaft. 4. The system according to claim 1, wherein the lower surface of the rudder provided on the top of the main rudder plate is set to be substantially the same as the lower surface of the bottom wall of the hull, and the link mechanism is provided above the rudder. A double rudder device according to any of the claims.