JPS6243397A - Rudder - Google Patents

Abstract

PURPOSE:To eliminate an independent driving source serving to swirl a front and a rear flap, by a method wherein both the front and the rear flap are swirled through steering of a main rudder plate. CONSTITUTION:Since, when a main rudder plate 3 is rotated by theta1 countclockwise around a rudder shaft 2, a front shaft 5 is moved leftward as one faces the advancing direction of a ship, a font lever 10 is swirled by theta5 counterclockwise around a front lever swirl center pin 15. Since an angle theta5 is lower than an angle theta1, a front flap 4 is steered by the difference angle theta4 therebetween clockwise from the main rudder shaft 3. Since, when the front lever 10 is rotated by theta5 counterclockwise, a rear lever swirl center pin 16 is moved leftward as one faces the advancing direction of the ship, a rear lever 13 is rotated by an angle counterclockwise from the main rudder plate 3 around a rear shaft 8, and finally a rear flap 7 is steered in the advancing direction of a ship by an angle theta3 being the sum of the angle theta2 and the angle theta1.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to a rudder used on a ship.

[Prior Art] A conventional rudder used on a ship is a single plate-shaped rudder.

However, in the case of a single plate-shaped rudder, the steering angle is small and the ship maneuverability is poor.

Therefore, as a solution to these recent drawbacks, Fig. 8,
A rudder having a configuration as shown in FIG. 9 has been considered. In other words, the turning performance of the rudder is improved by using a rudder composed of a main rudder plate a, and front flaps b and rear flaps C that are pivotally connected to the front and rear ends of the main rudder plate a, respectively. In addition to making it possible to make sharp turns, the turning performance is improved even when turning at a small angle or when sailing at slow speeds.

In such a rudder, as shown in Fig. 9, the main rudder plate a is aligned with the rudder axis d.
The front flap b is pivoted to the front end of the main rudder plate a by a vertical front axis e, and the rear flap C is attached to the front end of the main rudder plate a by a vertical front axis e. It is pivotally connected to the 1st and 2nd ends of the main rudder plate a by a shaft t.

The front hydraulic motor h and the rear hydraulic motor i, which are driven by pressure oil supplied from the hydraulic piping 9, are built into the front flap b, (Q section flap C, , the rear flaps C can each be turned relative to the main rudder plate a.

[Problems to be Solved by the Invention] In the systems shown in FIGS. 8 and 9 described above, the outflow direction of the water flow is changed by the main rudder plate a, the front flap b, and the rear flap C, so that the water flow is smooth. The hydraulic piping 9 is routed through the rudder axle d and the main rudder plate a to provide front hydraulic pressure. Motor h, rear hydraulic motor! The construction was complicated because piping had to be installed in the main rudder plate a, and in addition to the drive power source for the rudder shaft d of the main rudder plate a, two hydraulic drive power sources were required.

It is an object of the present invention to provide a rudder that improves these points and allows the drive UJd structure and drive power source to be reduced to 111M.

[Means for Solving the Problems] The present invention includes a main rudder plate that is vertically mounted approximately at the center and pivots about the rudder axis, and a main rudder plate that pivots at the front end of the rudder plate by a vertical front axis. a front flap pivoted to the rear end of the main rudder board by a vertical rear shaft; a front lever whose front end is fixed to the front flap via the front shaft; a rear lever fixed to the rear flap via a rear shaft; and v! of the front lever. A pin hole is provided at the end into which a front lever turning center pin protruding from the rear hull behind the rudder shaft is fitted, and a pin hole is provided at the front end of the rear lever at a position rearward from the rudder shaft. The rudder is provided with a pin hole into which a rear lever turning center pin protruding from either the rear hull or the front lever is inserted.

[Function] When the main rudder plate is turned, the front flap turns in the opposite direction to the main rudder plate, and the rear flap turns in the same direction as the main rudder plate, reducing the outflow of the water flow generated by the propeller. The direction will change smoothly.

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

As shown in FIG. 1, a vertical rudder shaft 2 is rotatably attached to the rear hull 1. At the lower end of the rudder shaft 2 (well, the main rudder plate 3
The center of the main rudder plate 3 is fixedly fixed, and by rotating the rudder shaft 2, the main rudder plate 3 can be turned around the rudder shaft 2.

Reference numeral 4 denotes a front flap, and a front shaft 5.5 projects from the upper surface and the lower surface so as to be aligned vertically in a straight line. The upper and lower sides of the main rudder plate 3 mentioned above extend forward (to the right in Fig. 1), forming a bearing 6.6, and the front shaft 5 integrated with the front flap 4 is vertically extended. It is rotatably supported in this state.

Reference numeral 7 denotes a rear flap, and a rear shaft 8 is provided so as to protrude from the upper surface and the lower surface so as to be aligned vertically in a straight line. The upper surface side and the lower surface side of the main steering plate 3 extend rearward (to the left in FIG. 1), and bearings 9, 9 are formed, and the rear shaft 8 integrated with the rear flap 7 is in a vertical state. It is rotatably supported.

The front end (the right end in FIG. 1) of a front lever 10 is fixed to the upper front shaft 5, and as shown in FIG. A hole 11 is drilled therein, and the middle portion of the front lever 10 is widened, and an arc-shaped opening 12 centered on the front shaft 5 is provided. The rudder shaft 2 passes through the opening 12.

The rear end of a rear lever 13 (left Ql: in FIGS. 1 and 2) is fixed to the upper rear shaft 8, and the rear lever 13 is connected to the lower side of the upper lever 10 as described above in 1) to the rudder shaft. It extends to the front of nearly 2. A long hole 14 extending in the front-rear direction is bored near the front end of the rib lever 13.

As shown in FIG. 1, a front lever turning center pin 15 is provided to protrude downward from a portion rearward of the position where the rudder shaft 2 of the rear hull 1 is provided, and a long hole 11 of the front lever 10 is provided.
is inserted into. Further, a rear lever pivot center pin 16 is provided to protrude downward from a portion between the elongated hole 11 and the opening 12 of the front lever 10, and is fitted into the elongated hole 14 of the rear lever 13.

2 and 3 show a case where the steering angle is zero, and the main rudder plate 3, front flap 4, and rear flap 7 are all aligned in a straight line in the longitudinal direction. In this state, rotate the rudder shaft 2 counterclockwise and move the main rudder plate 3 to the rudder shaft 2 as shown in FIGS. 4 and 5.
When the front shaft 5 is steered counterclockwise by an angle θ1 around , the front shaft 5 moves to the left in the direction of travel of the ship.
The front lever 10 pivots counterclockwise by an angle θ5 about the front lever pivot center pin 15. Since the front flap 4 and the front lever 10 are integrally fixed via the front shaft 5, the front flap 4 also rotates counterclockwise along with the front lever 10 about the front lever pivot center pin 15. It will rotate by an angle θ5. However, the angle θ5
is smaller than the angle θ1, so the front flap 4 is steered clockwise with respect to the main steering plate 3 by the angle θ4 of the difference.

As described above, when the front lever 10 rotates counterclockwise around the front lever rotation center pin 15 by an angle θ5,
Since the rear lever turning center pin 16 moves to the left in the direction of travel of the ship, the rear lever 13 rotates counterclockwise by an angle θ2 with respect to the main rudder plate 3 around the rear shaft 8.
As a result, the rear flap 7 is steered by an angle θ3, which is the sum of this angle θ2 and the angle θ cage at which the main rudder plate 3 is steered, with respect to the traveling direction of the ship. At this time, the front flap 4,
The orientation of the main rudder plate 3 and rear flap 7 is as shown in Figure 5, and the wake of the propeller is sequentially changed to the lateral direction, so the water flow changes smoothly, there is less resistance generated by the rudder, and there is no vibration. It becomes less. This reduces the generation of vortices caused by water colliding with the rudder, reduces the turning torque of the steering gear, reduces driving horsepower, and improves the driving efficiency of each steering wheel.

In addition, as shown in FIG. 3 and FIG. Axis 5 and rear lever pivot center pin 1
By selecting the distance L3 between the shaft centers between the rudder shaft 2 and the front lever turning center pin 15, and the distance L4 between the shaft centers between the rudder shaft 2 and the front lever turning center pin 15, the mutual relationships between θ3/θ1 and θ5/θ1 can be determined. You can decide.

6 and 7 show a further embodiment of the present invention, and the same parts as in FIGS. 1 and 4 are given the same reference numerals. In the embodiment shown in FIGS. 6 and 7, the rear lever pivot center pin 16 is provided to protrude from the rear hull 1 behind the rudder shaft 2, and passes through the opening 12 of the front lever 10 to the front end of the rear lever 13. It is fitted into the elongated hole 14 of. In this embodiment as well, when the main rudder plate 3 is steered counterclockwise by the rudder shaft 2 as shown in FIG. 7, the front flap 4 rotates clockwise relative to the main rudder plate 3. The rear flap 7 is the main rudder plate 3.
It will rotate counterclockwise. In this embodiment, the position of the front lever turning center pin 15 and the position of the rear lever turning center pin 16 can be arbitrarily attached to the rear hull 1, and the selection range of θ3/θ1 and θ5/θ1 is further expanded. It's wider and has more freedom.

[Effects of the Invention] In the present invention, both the front flap and the rear flap turn by steering the main rudder plate, so an independent drive source for turning the front flap and the rear flap is not required, and the structure is simplified. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Fig. 2 is a plan view taken along the line ■-■ in Fig. 1, and Fig. 3 is a plane showing the direction of the main rudder plate and flaps in the state shown in Fig. 2. Fig. 4 is a plan view when the steering is changed from Fig. 2, Fig. 5 is a plan view showing the direction of the first rudder plate and flap in the state shown in Fig. 4, and Fig. 6 is another embodiment of the present invention. A side view of the example, Fig. 7 is a plan view of the one shown in Fig. 6 in the steered state taken along line V■-■, Fig. 8 is a side view of the hull,
FIG. 9 is a side view of a rudder that has been recently considered. 1 is the rear hull, 2 is the rudder shaft, 3 is the main rudder plate, 4 is the front flap, 5 is the front shaft, 7 is the rear flap, 8 is the rear shaft, 10
13 is a front lever, 13 is a rear lever, 15 is a front lever turning center pin, and 16 is a rear lever turning center pin. Patent application Hitoshikawajima Ichima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) A main rudder plate that pivots around a rudder axle vertically mounted substantially at the center, a front flap pivoted to the front end of the main rudder plate by a vertical front axis, and the main rudder plate. a rear flap pivotally connected to the rear end by a vertical rear axis; a front lever fixed at the front end to the front flap via the front axis; and a rear flap at the rear end via the rear axis; a rear lever fixed to the front lever, and a pin hole is provided at the rear end of the front lever into which a front lever turning center pin protruding from the rear hull behind the rudder shaft is inserted; , the front end of the rear lever is provided with a pin hole into which a rear lever turning center pin, which projects from either the rear hull or the front lever at a position rearward of the rudder shaft, is inserted. Rudder to do.