JPH0449035Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a propeller moving device for a ship that can move a propeller used to propel the ship in the left and right direction.

[Prior art] The same applicant as the present application filed Utility Application No. 1983-83071.
(Utility Model Application No. 61-198199), in order to increase the efficiency of ship maneuvering, the propeller of a ship is capable of turning the propeller in the left and right direction, thereby directing the propeller in the direction of travel of the ship. We are proposing a mobile device.

FIG. 3 is a schematic diagram showing a propeller moving device disclosed in Japanese Utility Model Application Publication No. Sho 61-198199. The illustrated propeller moving device 1 includes a propeller 2 used to propel a ship, a propeller shaft 3 provided integrally with the propeller, a drive shaft 4 rotationally driven by a drive source, and a universal joint 5. , a support bracket 6 , and a turning means 7 .

The drive shaft 4 projects from the stern of the hull 8 to the outside of the ship. The universal joint 5 is located outboard and transmits the rotation of the drive shaft 4 to the propeller shaft 3. Moreover, this universal joint 5 connects the drive shaft 4 and the propeller shaft 3 in a bendable manner.

The support bracket 6 includes an integrally provided pivot shaft 9, which is rotatably supported by the hull 8. Further, the support bracket 6 rotatably supports the propeller shaft 3 at its boss portion 6a.

The pivoting means 7 rotates the pivot shaft 9, thereby pivoting the support bracket 6 in a substantially horizontal plane.

Important features of the illustrated propeller moving device 1 include the bending center of the universal joint 5 and the support bracket 6.
The pivot axis of is located on the same line 10. Therefore, when the support bracket 6 is rotated by the rotation means 7, the propeller shaft 3 is bent relative to the drive shaft 4 and rotates together with the support bracket 6.

In this way, according to the illustrated propeller moving device 1, the propeller 2 can be turned left and right, so that the course of the ship can be changed smoothly and efficiently.

[Problems to be Solved by the Invention] However, there is still room for improvement in the propeller moving device 1 as described above.

First, in the propeller moving device 1 described above,
In order to enable the propeller shaft 3 to pivot in the left-right direction, the bending center of the universal joint 5 and the pivot axis of the support bracket 6 must be located on the same line 10. However, when actually assembling the propeller moving device and attaching it to the hull 8, it is difficult to position them on the same line 10.

Furthermore, in order to position the pivot axis of the support bracket 6 on the same line 10 as the bending center of the universal joint 5, the length of the support bracket 6 in the direction of movement of the ship must be increased. However, as this length increases, the fluid resistance that the support bracket 6 receives increases, which adversely affects the propulsion efficiency of the ship.

Furthermore, in the propeller moving device 1 described above, the rotation angle of the rotation shaft 9 and the rotation angle of the propeller shaft 3 are equal. Therefore, if a slight angular error occurs when the rotating shaft 9 is rotated by the rotating means 7, that angular error also appears on the propeller shaft 3 as it is. Further, the absolute displacement amount of the rotation shaft 9 is smaller than the absolute displacement amount of the propeller shaft 3. Therefore, when trying to adjust the displacement amount of the propeller shaft 3 within a small range, it is necessary to adjust the displacement amount of the rotation shaft 9 within a smaller minimum range.
In other words, in the propeller moving device 1 having the structure shown in FIG. 3, it is difficult to make minute angle adjustments of the propeller shaft 3.

Therefore, an object of the present invention is to provide a propeller moving device for a ship that is easy to assemble and attach to a ship, and also allows minute angle adjustments of the propeller shaft.

[Means for solving the problem] A propeller moving device for a ship according to this invention has the following features:
A propeller used to propel a ship, a propeller shaft provided integrally with the propeller,
It includes a drive shaft that extends from inside the ship to outside the ship and is rotationally driven by a drive source located inside the ship, and a universal joint that transmits the rotation of the drive shaft to the propeller shaft. The universal joint bendably connects the drive shaft and the propeller shaft. The propeller moving device further includes a sleeve that rotatably holds the propeller shaft and can slide on the propeller shaft; The sleeve is provided with a support member that rotatably supports the sleeve at the portion thereof, and a turning means that rotates the support member.

[Operation] When attempting to change the course of the ship, the support member is rotated by the rotating means. As the support member pivots, the sleeve also pivots, so that the propeller shaft is bent relative to the drive shaft and oriented in the direction of the propeller's course of the ship. Since the pivot axis of the support member and the bending center of the universal joint are not located on the same line, the sleeve slides on the propeller shaft with the pivoting operation.

[Example] If the height of the propeller is fixed, when the ship is navigating in shallow water or docking the ship, the propeller may come into contact with the ground or some other obstacle and be damaged. receive. Also, when a ship sails over a net set in the sea, the propeller gets caught in or cuts the net. In order to avoid such problems, there is a need for a device that can move the propeller in the vertical direction.

Therefore, in a preferred embodiment of this invention, in addition to being able to move the propeller in the left and right directions, it is also made to be able to move in the up and down directions. In addition,
The "vertical direction" used in this specification is a direction substantially perpendicular to the water surface, and the "horizontal direction" is the width direction of the ship.

FIG. 1 is a side view showing a preferred embodiment according to the invention.

A propeller shaft 13 is integrally provided with the propeller 12. Further, as shown in the figure, a drive shaft 14 that is rotatably driven by a drive source located inside the ship extends from inside the ship to outside the ship. This rotation of the drive shaft 14 is transmitted to the propeller shaft 13 via the universal joint 15. The universal joint 15 connects the drive shaft 14 and the propeller shaft 13 so as to be bendable in the vertical and horizontal directions.

The support member 17 is supported by the hull 19 so as to be able to rotate around an axis extending in the vertical direction. The sleeve 16 fitted onto the propeller shaft 13 rotatably holds the propeller shaft 13 and can slide on the propeller shaft 13. The lower end of the support member 17 and the sleeve 16 are connected via a spherical bearing. Further, the support member 17 integrally has a pivot shaft 17a extending in the vertical direction. Preferably, the support member 17 is shaped so that it can function as a rudder. in particular,
The support member 17 has a rudder plate shape in which a portion located in the sea extends long and narrow along the traveling direction of the ship.
In order to more fully function as a rudder, the support member 17 preferably has a fin 17b that extends rearward.

A turning means 18 for turning the support member 17 is arranged inside the ship. This turning means 18
is a hydraulic stroke rotary actuator 20
, a gear 22 fixedly attached to the spindle 21 of the actuator 20, and a gear 23 fixedly attached to the pivot shaft 17a of the support member 17. The gear 22 and the gear 23 are made to mesh with each other and are housed in the same case 24. The hydraulic stroke rotary actuator 20 rotates the spindle 21 and moves the spindle 21 in the vertical direction. When the spindle 21 moves vertically, the case 24 also moves vertically, and the pivot shaft 17a also moves vertically accordingly.

FIG. 2 is a plan view of the main parts of the embodiment shown in FIG. 1, viewed from above. With reference to FIGS. 1 and 2, the operation when turning the propeller shaft 13 in the left-right direction will first be described.

In this case, the spindle 21 is rotationally driven by the hydraulic stroke rotary actuator 20. The rotation of the spindle 21 is transmitted to the pivot shaft 17a of the support member 17 via gears 22 and 23. As a result, the support member 17 is
The propeller shaft 13 rotates around 7a, and the propeller shaft 13 also rotates accordingly. The propeller 12 is thus oriented in the direction of the ship's course. FIG. 2 shows the state after the propeller shaft 13 has turned.

Since the pivot axis of the support member 17 and the bending center of the universal joint 15 are not on the same line, the sleeve 16 slides on the propeller shaft 13 as the support member 17 and propeller shaft 13 rotate respectively. do.

As is clear from FIG. 2, the distance between the sleeve 16 and the bending center of the universal joint 15 is
It is larger than the distance between the sleeve 16 and the pivot axis of the support member 17. Therefore, the rotation angle φ of the support member 17 is larger than the rotation angle θ of the propeller shaft 13. For example, with the dimensional relationship as shown, the rotation angle φ of the support member 17 is approximately 50°, while the rotation angle θ of the propeller shaft 13 is approximately
It is 25°. This means the following.
That is, suppose that an angular error occurs when the turning means 18 attempts to turn the turning shaft 17a by a certain predetermined angle. The angular error does not directly appear as an angular error on the propeller shaft 13, but appears on the propeller shaft 13 as an error of 1/2 the size. Therefore, the propeller shaft 13
The error in the turning angle is not very large. Further, even when making a small turning angle adjustment to the propeller shaft 13, the turning angle can be adjusted to a relatively large value with respect to the support member 17, so that the small turning angle adjustment of the propeller shaft 13 can be easily performed. be able to.

Furthermore, as shown in FIG. 1, since it is not necessary to position the pivot axis of the support member 17 and the bending center of the universal joint 15 on the same line, the length of the support member 17 in the ship's traveling direction can be made relatively short. can do. If this length is shortened, the fluid resistance that the support member 17 receives will also be reduced, and the propulsion efficiency of the ship will not be adversely affected. Moreover, by shortening this length, the rigidity of the support member 17 also increases.
Therefore, unlike the device shown in FIG. 3, there is no need to provide a member to support the sleeve 16 from below.

Next, referring to FIG. 1, the operation when moving the propeller shaft 13 in the vertical direction will be described. In this case, the hydraulic stroke rotary actuator 20 moves the spindle 21 in the vertical direction. As the spindle 21 moves up and down, the case 24 also moves up and down, and as a result, the pivot shaft 17a also moves up and down. Accordingly, the propeller shaft 13 and the propeller 12 also move in the vertical direction. In FIG. 1, the positions where the propeller shaft 13 and the propeller 12 have moved up and down are shown by imaginary lines.

The propeller moving device 11 shown in FIGS. 1 and 2 is only one example of embodying this idea.
Therefore, within the scope of equivalents of this invention,
Various modifications and variations are possible. For example, in the illustrated embodiment, the propeller 12 is movable vertically and horizontally, but as a modification, the propeller 12 may be movable only horizontally. In addition, the support member 17
Although the hydraulic stroke rotary actuator 20 is used as the turning means 18 for turning the support member 17, as a modification, a hydraulic cylinder or the like may be used to turn the support member 17.

[Effects of the invention] As described above, according to this invention, it is not necessary to position the pivot axis of the support member and the bending center of the universal joint on the same line, making it easier to assemble the device and attach it to the ship's hull. can be done. Further, since the rotation angle of the support member is larger than the rotation angle of the propeller shaft, the rotation angle with respect to the propeller shaft can be accurately adjusted, and even minute angle adjustments can be made.

[Brief explanation of the drawing]

FIG. 1 is a side view of one embodiment of this invention. FIG. 2 is a plan view of the main parts of the embodiment shown in FIG. 1, viewed from above. Figure 3 shows the Utility Model 61-
FIG. 2 is a side view of a propeller moving device disclosed in Japanese Patent No. 198199. In the figure, 11 is a propeller moving device, 12 is a propeller, 13 is a propeller shaft, 14 is a drive shaft, 1
5 is a universal joint, 16 is a sleeve, 17 is a support member, and 18 is a pivoting means. In addition, in each figure, the same number indicates the same or equivalent element.

Claims (1)

[Scope of claims for utility model registration] (1) A propeller used to propel a ship, a propeller shaft provided integrally with the propeller, and a drive source extending from inside the ship to outside the ship and located inside the ship. a drive shaft rotationally driven by a drive shaft; and transmitting the rotation of the drive shaft to the propeller;
and a universal joint that bendably connects the drive shaft and the propeller; a sleeve that rotatably holds the propeller shaft and can slide on the propeller shaft; and a sleeve that rotates around an axis extending in the vertical direction. A propeller moving device for a ship, comprising: a support member that is supported by a ship body so as to be able to rotate the sleeve at its lower end; and a turning means that turns the support member. (2) The propeller moving device for a ship according to claim 1, wherein the support member has a rudder plate shape in which a portion located underwater is elongated in the direction of travel of the ship. (3) The propeller moving device for a ship according to claim 1 or 2, wherein the support member has a fin that extends rearward in an elongated manner. (4) The support member and the sleeve are connected via a spherical bearing, and the support member is supported by the hull so as to be able to move up and down. A propeller moving device for a ship according to any of Item 3.