JPS63287693A - Steering structure of universal type propeller device - Google Patents

Abstract

PURPOSE:To improve a steering effect at a low speed by installing an auxiliary rudder to an outer cylinder covering a propeller shaft near the backside of the propeller, and interlocking the auxiliary rudder with a left and right turning movement of the propeller shaft. CONSTITUTION:A vertical fixed wing 9 is provided at the upper and lower sides of an outer cylinder 5 for covering the drive shaft 3 of a propeller 2, and the shaft 11 of an auxiliary rudder 8 is erected by extending a bracket 10 from the end of that wing. The propeller shaft 3 can be put in turning movement by an universal joint 4 toward left and right, and up and down. A link 14 is installed to a hull 1 and a sleeve 16 is provided at the fixed point supporter 15 of its top end, and the steering arm 12 of the auxiliary rudder shaft 11 is inserted therein so as to slide freely. Accordingly, in case of steering by giving turning movement to the propeller shaft 3 toward left and right, the steering arm 12 is always slided through the fixed point supporter 15, so that the auxiliary rudder 8 can move in the radial direction of a circle whose center is this supporter 15. Therefore, the auxiliary rudder 8 can be operated matching with the turning movement direction of the propeller shaft 3, and a steering effect can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a steering structure for a universal propeller device.

(b) Conventional technology A propeller shaft with a propeller attached to the rear end is connected to a propeller shaft fixed to the hull side using a universal joint, etc., and this part of the propeller shaft is connected to the left and right, up and down by hydraulic cylinders, etc. There is a known propeller device that can be freely moved to perform steering, depth and lotus adjustment, etc., and this is what is called a universal type propeller device.

(c) Problems that the invention aims to solve This propeller device has the advantage of being simple and lightweight because it can combine the propulsion function and the steering function into one set, but the propeller shaft is attached to a universal joint. Because of the connection, the bending angle is limited to about 15 degrees, which has the disadvantage that steering with a small turning radius is not possible.

To improve this, some ships have installed an auxiliary rudder on the propeller shaft in front of the propeller, but this still does not provide sufficient steering function when the ship is at low speed. This is because the water flow acting on this auxiliary rudder is only proportional to the speed of movement of the ship. If it is a steering structure of a normal propeller device to be installed.

Even if the speed of the ship is slow, the water current acting on the rudder is caused by the propeller.

It has a considerable water flow speed and performs the appropriate function)
. Therefore, although it has the above-mentioned significant advantages, it has been hindered from being widely used in ships that require sharp maneuverability at low speeds (for example, fishing boats).

(d) Means for Solving the Problems Therefore, the present invention involves inserting a universal joint in the middle of the propeller shaft to which the propeller is mounted at the rear end, and moving the propeller shaft horizontally, vertically, and vertically around the universal joint. In a universal propeller device that performs steering by rotating the propeller, an auxiliary rudder is provided behind the propeller or in the vicinity of the propeller and is attached to an outer cylinder that covers and protects the propeller shaft, and the auxiliary rudder is used for steering. The basic configuration is that the auxiliary rudder is linked to the rotation of the propeller shaft, and in this configuration, the auxiliary rudder is connected to a fixed point holding part that is constructed by extending the steering arm of the auxiliary rudder from the hull by a link, etc. The above-mentioned problems were solved by using a structure in which the rotation of the propeller shaft is linked to the rotation of the propeller shaft using a link mechanism that is slidably pivoted.

(E) Effect As a result, even if it is a universal type propeller device,
Since the auxiliary rudder is installed behind the propeller or near the propeller, water flow with sufficient speed acts on it, and there is no inferiority in steering performance. Since this is done in conjunction with the rotation, there is no need to separately provide a dedicated steering mechanism or the like.

(F) Examples Examples of the present invention will be described below with reference to the drawings.
Figures 1 to 3 are side views and rear views of the main parts of the first embodiment;
A plan view, FIGS. 4 to 6 are side views of main parts of the second embodiment,
They are a rear view and a plan view.

In the first embodiment shown in FIGS. 1 to 3, the universal propeller device protrudes from the hull 1 and is located midway through a propeller shaft 3 with a propeller 2 attached to the rear end (at a position that only slightly protrudes from the stern). (around) Universal joint 4 is inserted (however, most of the propeller shaft 3 is protected by the outer cylinder 5 which is a cover and is not exposed), therefore, the propeller shaft 3 is centered at this point. Hydraulic cylinders 6 and 7 are installed in the horizontal and vertical planes between the hull and the hull.
By interposing the hydraulic cylinders 6 and 7, the propeller shaft 3 can be changed horizontally and vertically to any desired angle, and can be maintained and fixed at that position. In addition,
When the propeller shaft 3 is rotated horizontally, steering is performed.
When rotated up and down, speed adjustment (the higher the speed, the higher the speed, and at the highest speed, the setting is made so that the outer periphery of the propeller 2 is just barely getting wet) and depth adjustment are performed.

On the other hand, this universal type propeller device is generally equipped with an auxiliary rudder 8, but in this example, the auxiliary rudder 8 has a normal shape of a vertically long flat plate, which is attached to the outer cylinder 5 and is attached to the propeller 2. It is installed behind the. That is,
Vertical fixed wings 9 are formed above and below the outer cylinder 5, and brackets 10 are extended backward from each wing tip.
The rudder shaft 11 of the auxiliary rudder 8 is set upright relative to the auxiliary rudder 8. Note that a steering arm 12 is attached to the rudder shaft 11, and steering can be performed by rotating the steering arm 12.

The auxiliary rudder 8 must operate in a direction that facilitates steering by rotating the propeller shaft 3 in the horizontal plane.
Here, this is made possible by the following link mechanism 13. That is, the two linkages 4 are extended backward from the hull 1 in an isosceles triangular shape so that their tips intersect on the propeller shaft 3.

A sleeve 16 is installed at the fixed point holding portion 15 which is the intersection point, and the steering arm 12 of the auxiliary rudder 8 is slidably fitted into this sleeve 16. As a result, when steering is attempted by rotating the propeller shaft 3 in a horizontal plane, the steering arm 12 is always held at this fixed point holding portion 1.
5, the auxiliary rudder 8 is oriented in the radial direction of a circle centered on the fixed point holding portion 15, and coincides with the rotating direction (steering direction) of the propeller shaft 3 (see FIG. 3). However, in one or more configurations, the propeller shaft 3 also rotates in the vertical direction, so the link 14 described above must allow this movement (see FIG. 1).

Note that it is sufficient for the auxiliary rudder 8 to rotate around the center of the fixed point holding section 15 within a range of 90 degrees.

The second embodiment shown in FIGS. 4 to 6 has the same structure as the first embodiment, except that the auxiliary rudder 8 has an inverted U-shape when viewed from the rear, and the position above the propeller 2 is In this propeller 2
The only difference is that it is provided so as to surround the Furthermore, due to these differences in installation location and shape,
While the auxiliary rudder 8 of the first embodiment is for low speed use, the rudder of the second embodiment is for high speed use.

(g) Effects of the invention Since this invention is as described above, that is,
In a so-called universal type propeller device, an auxiliary rudder 8 is provided behind the propeller 2 or in the vicinity of the propeller 2 by being attached to an outer cylinder 5 that covers and protects the propeller shaft 3.

Since the steering by the auxiliary rudder 8 is linked to the rotation of the propeller shaft 3, it is possible to improve the steering performance at low speeds while maintaining the advantages of this propeller device, such as simplicity and light weight. . In other words, the auxiliary rudder 8 operates by applying a water flow having a sufficient speed by the action of the propeller 2 to perform a steering function that is insufficient by the rotation of the propeller shaft 3 alone.
As a result, the steering performance is superior to that of ordinary steering devices. Of course, even with this arrangement, the steering operation is the same as in the past, and only involves turning the propeller shaft 3 left and right, up and down, that is, extending and contracting the hydraulic cylinders 6 and 7, and this does not impair the operability in any way. isn't it. Further, in this case, a link mechanism 1 in which the steering arm 12 of the auxiliary rudder 8 is slidably pivoted to a fixed point holding part 15 configured by extending a link 14 etc. from the hull 1
3 to interlock with the rotation of the propeller shaft 3, this becomes possible with a simple structure.

[Brief explanation of the drawing]

The drawings show embodiments of the invention. Figures 1 to 3 are side views and rear views of the main parts of the first embodiment;
A plan view, FIGS. 4 to 6 are side views of main parts of the second embodiment,
They are a rear view and a plan view. (Symbol) 1.Hull 2..Propeller 3..Propeller shaft 4..Universal joint 5..Outer tube 8..Auxiliary rudder 12..Steering arm 13..Link mechanism 14..Link 15..Fixed point Holding Department Patent Applicant: Nakashima Propeller Co., Ltd. (1 other person) Agent: Yoshio Itano, Patent Attorney Figure 5 Figure 6 Procedure auxiliary device (voluntary) 1. Display of the case 1985 Patent Application No. 124713 26 Name of the invention Steering structure for universal type propeller device 3, Person making the amendment Relationship to the case Patent applicant Address 688-1, Kamimichi Kitagata, Okayama City Name Representative of Nakashima Propeller Co., Ltd. Teruo Nakajima 5,? ! Date of the positive order The phrase ``problem that the invention seeks to arise'' is amended to read ``(c) problem that the invention seeks to solve.''

Claims (2)

[Claims] (1), the propeller shaft (2) that attaches the propeller (2) to the rear end (
3) Insert a universal joint (4) halfway, and connect this propeller shaft (3) to the universal joint (4).
) In a universal propeller device that steers by turning left and right and up and down around the propeller (2), an auxiliary rudder (
8) and an outer cylinder (3) that covers and protects the propeller shaft (3).
5) A steering structure for a universal propeller device, characterized in that the steering by the auxiliary rudder (8) is linked to the rotation of the propeller shaft (3). (2) The auxiliary rudder (8) can be freely slid into the fixed point holding part (15) formed by extending the steering arm (12) of the auxiliary rudder (8) from the hull (1) through a link (14), etc. The propeller shaft (3) is connected to the propeller shaft (3) by a link mechanism (13)
A steering structure for a universal propeller device according to claim 1, characterized in that the steering structure is linked to the rotation of the universal propeller device.