JPH0518238Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention relates to an elevating thruster.
In particular, the present invention relates to the structure of a marine thruster that can be raised and lowered and stored inside a ship when not in use.

(Prior Art) Fig. 3 shows a conventional example of such an elevating thruster, in which 1 is a propeller, 2 is a gearbox, 3 is a drive motor for rotationally driving the propeller 1, and 4 is for elevating and lowering the thruster. It is a hydraulic cylinder. The rotational force of the drive motor 3 is transmitted from the input shaft 5 to the input shaft 5a via the spline joint 6,
It is transmitted to the propeller 1 via gear 7. Reference numeral 8 denotes a support cylinder, which is connected to the piston rod of the cylinder 4 by a connecting body 9. When power is applied to the piston in the cylinder 4 for raising and lowering, the power is transferred to the supporting cylinder 8 through the connecting body 9. Reportedly, Propeller 1
and thrusters including gearbox 2 on hull A.
or store it inside the hull A.
Reference numeral 10 denotes a guide for smoothly guiding this ascending and descending movement, and is erected inside the room 11.

Problems with this type of conventional device are: (a) The power for the vertical movement is applied from both sides by the two cylinders 4, 4, so in order to perform the vertical movement smoothly, the two cylinders must be used. The operations of the cylinders must be synchronized, but this is difficult to achieve, and achieving perfect synchronization requires expensive incidental equipment costs.

(2) The presence of the guides 10, 10 makes the interior of the room 11 substantially narrow, which is very disadvantageous when, for example, it is desired to use the room 11 as a space for accommodating a hydraulic unit.

(3) Since oil is contained inside the gearbox 2, it is necessary to seal it at the upper end of the spline joint 6, but this is extremely difficult with this structure.

All of these issues remained as issues that needed to be resolved.

(Purpose of the invention) This invention was made to solve the above-mentioned problems with conventional lifting thrusters. It is an object of the present invention to provide an elevating thruster that can be smoothly operated, eliminates the installation of guides to guide the operation, saves space, and furthermore, seals the oil in the gearbox very easily. That is the purpose.

(Structure of the invention) As a means to achieve the above object, this invention is a thruster that is equipped with a turning means and a lifting means, and the lifting means allows it to be stored inside a ship when not in use. An elevator cylinder that can be raised and lowered and is equipped with a power source to rotate the rotating cylinder housed inside, and a gear box that can be raised and lowered together with the elevator cylinder and whose lower part rotatably holds the propeller. The piston sheath is located at a position concentrically enclosing a propeller drive input shaft extending from the inside of the ship to the outside of the ship. is fixed to the hull side and a piston is fixed thereto, the swing cylinder is arranged at a position where the internal space of the swing cylinder is divided by the piston, and pressure oil is introduced into the divided space. By operating the space as a hydraulic cylinder, the thruster is able to move up and down in the vertical direction with respect to the piston position.

Alternatively, a piston sheath 29 is fixed to the hull side by its upper end at a position concentric with the rotating cylinder 24, and an input shaft 5 whose upper end is connected to a propeller drive power source provided inside the hull. A spline joint 6 and an input shaft 5a are provided, respectively, which are inserted into the piston sheath 29 in a concentric position and engage with the input shaft 5 as a propeller drive shaft system, and drive the propeller 1 from the input shaft 5a via the gear 7. The shaft system is housed in the gearbox 2 at the bottom of the rotating cylinder 24, and the cylindrical space between the piston sheath 29 and the rotating cylinder 24 is used as a hydraulic cylinder, and the piston sheath 29 slides through the upper and lower ends thereof. The rotating cylinder 24 and the elevating cylinder 23 are sealed by leaving a hole for the piston sheath 29 and introducing pressure oil into the chamber of the hydraulic cylinder divided into upper and lower parts by the piston 28 fixed in the middle of the piston sheath 29. It can also be made to be able to go up and down.

(Operation) In order to use the thruster stored inside the ship by lowering it to the outside, pressure oil is introduced into the lower hydraulic cylinder of the rotating tube divided by the piston.
Drain the oil from the upper hydraulic cylinder. The rotating tube then descends together with the elevating tube, and the gearbox and propeller, which are integrally made with the rotating tube, also descend. At this time, the spline joint and the input shaft connected thereto also descend together with the rotating cylinder, but the space between the propeller drive input shaft, which extends outside the ship from the propeller drive power source installed inside the ship, and the spline joint is Since the engagement relationship is formed by splines machined into the rim, power can be transmitted between them without any problems, and the propeller drive can be continued in a stable state regardless of the elevation position.

Further, in order to rotate the rotating tube, the rotating power source provided in the elevator tube can be operated to rotate the rotating tube inside the elevator tube.

(Example) Next, an example of the device of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, and the same reference numerals as those in FIG. 3 shown as a conventional device indicate the same members as those in the same figure.

The elevating tube 23 can be moved up and down together with the rotating tube 24, and the rotating tube 24 is housed therein in a concentric relationship, and motors 27, 27 are provided at the upper part. Swivel tube 2
4 has a rotating gear wheel 25 fixed to the upper end, and pinions 26, 26 that mesh with this are rotated by motors 27, 27, so that regardless of the vertical position of the thruster device with respect to the rotating cylinder 24, A turning movement can be performed.

The rotating cylinder 24 has a lower portion that is integrally formed with a gear box 2 that rotatably holds the propeller 1, and a drive shaft system for the propeller 1 is housed inside. That is, the input shaft 5 has its upper end connected to the propeller drive motor 3 provided inside the hull, and its upper end surface is inserted into a piston sheath 29 fixed to the hull at a position concentric with the piston sheath 29, and serves as the input shaft as a propeller drive shaft system. The propeller 1 is connected to a gear 7 through a spline joint 6 that engages with the spline joint 5 and an input shaft 5a that is coupled thereto, and drives the propeller 1 to rotate.

The piston sheath 29 has a piston 28 on its outer peripheral surface.
is fixed, and the piston 28 is disposed in such a position that it can slide on the inner peripheral surface of the rotating cylinder 24 in an oil-tight manner. Further, the rotating cylinder 24 has an upper surface sealed oil-tightly by a gear wheel 25, a lower surface oil-tightly sealed by a lid 32, and a piston sheath 29 slidingly passing through the center of each. Hydraulic cylinders 35 and 36 are formed above and below the piston 28, respectively, by leaving and sealing the holes 33 and 34 for allowing the piston 28, and a means for introducing pressure oil into each hydraulic cylinder is provided. There is.

FIG. 2 shows an example in which the configuration of FIG. 1 is embodied as a device that can be used more practically.
In FIG. 2, a piston sheath 29 fixed to the hull A has passages 30, 3 for letting pressure oil in and out.
1 is bored, and when the pressure oil in the passage 30 is introduced, the cylinder below the piston 28 is filled with pressure oil, thereby lowering the thruster device. Conversely, when pressure oil is introduced into the passage 31, the piston 28
The upper cylinder is filled with pressure oil so that the thruster device can be raised.

(Effects of the invention) Since the elevating thruster according to this invention is constructed as described above, it has the following excellent effects.

(a) Due to the structure in which a hydraulic cylinder is formed inside the rotating cylinder, sealing against oil in the gearbox can be achieved very simply and easily, and the problem of sealing, which was an issue with conventional equipment, has been solved. be done.

(b) Since the activation position of the elevating motion of the thruster device is aligned with the center of the input shaft of the thruster, there is no need to install multiple sets of elevating means in parallel for elevating the thruster device; There is no need to take difficult countermeasures such as making them synchronize with each other. Further, the lifting and lowering operations can be performed smoothly, and therefore there is no need to install a guide or the like to guide the movement, and space can be saved accordingly.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the inventive device, FIG. 2 is a sectional view of another embodiment of the inventive device, and FIG. 3 is a sectional view of a conventional device. 1...Propeller, 2...Gearbox, 3...
Drive motor, 5, 5a...Input shaft, 6...Spline joint, 7...Gear, 23...Elevating cylinder, 24...
...Swivel tube, 25...Gear wheel, 26...Pinion, 27...Motor, 28...Piston, 29
... Piston sheath, 30, 31 ... Passage, 32 ...
Lid, 33, 34... Hole, 35, 36... Hydraulic cylinder.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A thruster that is equipped with a turning means and an elevating means and can be stored inside a ship when not in use by means of the elevating means, which can be raised and lowered and stored inside the thruster. It is constructed integrally with an elevating tube that is provided with a power source for rotating the rotating tube, and a gear box that can move up and down together with the elevating tube and whose lower part rotatably holds a propeller. It is equipped with a rotating cylinder that can be rotated inside the elevating cylinder by a power source, and a piston sheath is fixed to the hull side in a position that concentrically encloses a propeller drive input shaft extending from the inside of the ship to the outside of the ship. A piston is fixed to the swivel cylinder, the swivel cylinder is arranged at a position where the piston divides the space inside the swiveling cylinder, and pressure oil is introduced into the divided space to operate the space as a hydraulic cylinder. An elevating thruster characterized in that the thruster can be moved up and down in the vertical direction based on the piston position. (2) A piston sheath 29 is fixed to the hull side by its upper end at a position concentric with the rotating cylinder 24, and an input shaft 5 whose upper end is connected to a propeller drive power source provided inside the hull. is inserted into the piston sheath 29 concentrically with the piston sheath 29, and is provided with a spline joint 6 and an input shaft 5a, respectively, which engage with the input shaft 5 as a propeller drive shaft system,
The shaft system that drives the propeller 1 from the input shaft 5a via the gear 7 is the gear box 2 at the bottom of the rotating tube 24.
The cylindrical space between the piston sheath 29 and the rotating cylinder 24 is used as a hydraulic cylinder, and the upper and lower ends thereof are closed off, leaving holes for the piston sheath 29 to slide through. Scope of Utility Model Registration Claim 1: The rotating cylinder 24 can be raised and lowered together with the elevating cylinder 23 by introducing hydraulic pressure into the chamber of a hydraulic cylinder divided into upper and lower parts by a piston 28 fixed in the middle of the cylinder 29. Lifting thruster as described.