JP3056375B2 - Marine side thrusters - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marine side thruster which can be easily divided, is driven by a chain, and has a structure capable of adjusting the chain tension.

[0002]

2. Description of the Related Art In a conventional marine side thruster in which a screw propeller type propulsion device is provided in a tunnel provided below a water line and penetrating a hull, a propulsion shaft provided with a propulsion device and a propulsion shaft orthogonal thereto are provided. An input shaft extending outside the tunnel is connected via a bevel gear mechanism, and the rotation of the input shaft is transmitted to the propulsion device.

In this case, the rotation from the prime mover, which requires relatively high-speed rotation, is transmitted to a propulsion machine, which requires relatively low-speed rotation, at a reduced speed by a bevel gear mechanism. Because of the balance of the numbers, the size of the case that supports the propulsion shaft by the size of the bevel gear in the tunnel and that includes the bevel gear mechanism in a watertight manner is determined. This increases and narrows the cross-sectional area of the flow path in the tunnel, causing a reduction in efficiency. In addition, the bevel gear mechanism is expensive because it is structurally difficult to produce, and has the disadvantage of generating large vibration noise.

In recent years, a side thruster has been proposed in which power is transmitted between a drive shaft on the hull side and a propulsion shaft in a tunnel using a chain and a chain wheel. In order to reduce the cross-sectional area of the tunnel, it is advantageous to use a chain with a small pitch as much as possible, and to design the chain so that the required strength is obtained by giving the chain width in the longitudinal direction of the tunnel. However, if chains are used in parallel, inconveniences such as unbalanced load will occur.
For example, as proposed in Japanese Utility Model Application Laid-Open No. 58-164900, power from independent drive sources for each chain is simultaneously transmitted to a chain spanned over two chain wheels fixed to a propulsion shaft. The power transmission by the side thruster chain was performed efficiently and smoothly.

[0005] However, such power transmission by a chain still generates a large amount of noise and has a low power transmission efficiency. It is considered that this is because the tension of the chain used for power transmission of the side thrusters is not sufficiently adjusted, and the tension tends to decrease in general.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the tension used for the power transmission of the side thruster can be adjusted even after the chain is stretched. Increasing the tension of the tensioned chain,
An object of the present invention is to provide a marine side thruster structure that can be equalized. It is a further object of the present invention to provide a structure that can be easily attached and detached without requiring an oversized mechanism, and that can appropriately provide the tension of the drive chain.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned technical problems, and has a screw propeller type propulsion device disposed in a tunnel provided below a waterline and penetrating a hull. In the mounted marine side thruster, a chain wheel is fixed to a propulsion shaft equipped with the propulsion device,
A drive shaft mounted on a drive source provided outside the tunnel is disposed in parallel with the propulsion shaft, and a chain pinion is also fixed to the drive shaft, so that a drive shaft is connected between the chain wheel and the drive shaft chain pinion. A propulsion shaft case for a propeller, having a chain through hole, a support arm extending toward the drive shaft case, and a prop shaft case; A slide fitting mechanism is provided between the propulsion shaft case and the drive shaft case, and the height of the propulsion shaft case can be adjusted to adjust the tension of the stretched chain. Provide side thrusters.

[0008] The slide fitting mechanism is
It is preferable to use a ring mechanism, a bolt and a nut mechanism. Further, the propulsion shaft case is provided with a flange portion, whereby the propulsion shaft case can be easily detached and attached by fixing to the flange hole portion provided at the upper part of the tunnel.

[0009]

[Function] The structure of the marine side thruster of the present invention is made from the following viewpoints. That is, in general, a side thruster is a screw propeller type thruster provided in a tunnel provided under a waterline and penetrating a hull when a delicate and difficult rudder operation is required, for example, when a ship berths. And a screw propeller provided separately from the hull propeller screw propeller so that the head portion of the hull can be moved laterally right or left.

[0010] The propulsion shaft equipped with the screw propeller is rotated by externally applied power by a chain wheel. That is, a drive shaft mounted on a drive source provided outside the tunnel of the hull is disposed in parallel with the propeller propulsion shaft, a chain wheel is fixed to the propulsion shaft, and a chain pinion is fixed to the drive shaft outside the tunnel. , The chain is suspended between the chain wheels, the propulsion shaft is rotated and supported, and power is transmitted. Therefore, the chain for power transmission is provided through a support arm having a chain through hole connecting the propeller propulsion shaft storage case and the external motor case, and the chain wheel of the propeller propulsion shaft and the external drive are provided. The shaft chainwheel is connected.

Therefore, the chain is housed in the arm case having the chain through hole. Therefore, it has been conventionally difficult to adjust the tension and tension of the chain. However, according to the present invention, a slide fitting mechanism is provided in the middle of the arm case, and the entire arm case is slid up and down to adjust the height and adjust the tension of the stretched chain. I did it.

The slide fitting mechanism according to the present invention can be operated by an O-ring mechanism and a mechanism for sliding the O-ring mechanism, for example, a combination mechanism of a fixed nut and a bolt. Generally, a plurality of such slide fitting mechanisms are provided around the arm case. They can generally be adjusted independently of each other,
Adjustment can be made so that the tension is not uneven in the left, right, front and back, and the like.

Further, in the marine side thruster according to the present invention, a flange portion (in the embodiment,
A flange portion and a fixing plate fixed to the flange portion are provided. Further, an opening is formed in the upper portion of the side thruster tunnel, and the propeller propulsion shaft case of the side thruster is passed therethrough to form a flange of the opening (i.e., a flange). ,
Around the opening), a flange portion provided on the arm case is fixed. Therefore, when there is a request for repair and repair, only the marine side thruster can be removed from the hull to repair or disassemble. The drive part of the marine side thruster, i.e. the motor part and the drive chain part, are thus also fixed to the hull.

Therefore, the upper opening of the side thruster tunnel is formed with a flange around it, and a plurality of bolt holes are provided so that the flange of the arm case can be just fixed.

The opening at the top of the tunnel must be large enough to allow the entire thruster propeller shaft portion of the side thruster to pass through. With such a structure, the side thruster of the present invention is detachable from the hull.

In the structure of the marine side thruster according to the present invention, the slide fitting mechanism is configured to slide with respect to the O-ring mechanism by a combination of a fixed nut and a bolt as described above. The chain tension can be adjusted by sliding using a combination mechanism of a screw and a thread cutter. A plurality of fixing nut and bolt mechanisms for this purpose can be provided around the supporting arm case and can be independently adjusted. Therefore, even if there are a plurality of chains, each tension can be equalized by adjusting each bolt and nut mechanism.

Next, the structure of the marine side thruster of the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.

[0018]

FIG. 1 is a partial cross-sectional view showing the entire structure of a marine side thruster according to the present invention as viewed from the side. And
FIG. 2 is a side view including a partial cross section of the side thruster of FIG. 1 viewed from the propeller side.

Reference numeral 1 denotes a hull, reference numeral 2 denotes a side thruster tunnel, and reference numeral 3 denotes grids provided at an entrance and an exit of the thruster tunnel for protecting a propeller. And 4
Is the opening 1 in the upper part of the side thruster tunnel.
Reference numeral 5 denotes a flange-like portion provided around the periphery 9, 5 denotes a fixing plate for detachably fixing the arm case 16 of the drive shaft case of the side thruster to the hull 1, and 6 denotes a hole 19.
And a bolt and a nut 6 for fixing the side thruster fixing plate 5 to the flange-like portion 4 around the periphery.

That is, the entire side thruster can be easily removed from the hull 1. Power is transmitted to the propeller propulsion shaft 8 by chains 10, 10 'via chain wheels 9, 9'. The power source is
The drive shaft 12 of the motor 18 and the chain pinion 1
With chains 10, 10 'hung on 1, 11',
The propulsion shaft is driven.

That is, a chain wheel 9, 9 ′ is fixed to the propulsion shaft 8 on which the propeller 7 is mounted, and the drive shaft 12 mounted on a drive source 18 provided outside the tunnel 2 is moved in parallel with the propulsion shaft 8. The chain pinions 11, 11 ′ are fixed to the drive shaft 12, and the chain wheels 9, 9 ′ of the propulsion shaft 8 and the chain pinions 11,
11 ′ and a structure for transmitting a rotational driving force to the propulsion shaft 8. Further, a propulsion shaft case 30 for a propeller having a chain through hole therein and a support arm 16 extending toward the drive shaft case 17 is provided.

Further, a slide fitting mechanism (O-ring 3) is provided between the propulsion shaft case 30 and the drive shaft case 17.
1 and a mechanism of fixing bolts 21, nuts 23 and 24 and a slide mechanism by the fixing point 20) are provided.
By adjusting the heights of 0 and 16, the tension of the stretched chain 10 can be adjusted.

FIG. 1 shows the manner in which the chain 10 is hooked, and the support arm case portion, the drive case portion, and a part obtained by cutting the fixing mechanism so that the fixing mechanism of the propulsion shaft case 30 and the support arm case 16 can be seen. Shown in cross section.

That is, the propulsion shaft 8 supporting the propeller 7 is
As shown, it is fixed to the case 30 by a bearing mechanism. Arm case 16 extending upward from case 30
, The chains 10, 10 ′ of the chain wheels 9, 9 ′ of the propulsion shaft 8 extend to the drive shaft 12.
The arm case 16 has a flange portion 33 in which a threaded hole 34 (see FIG. 3) is provided.

As shown in detail in FIG. 3, the threaded bolt 14 passes through the flange member 13 and the fixing plate 5 and is fixed to the threaded hole 34. And the flange member 13
A color member 35 is provided to maintain a predetermined interval between the fixing plate 5 and the fixing plate 5. Therefore, as shown, the threaded bolt 14 fixes the flange member 13, the fixing plate 5, and the arm case flange portion 33.

FIG. 2 is a side view of the apparatus shown in FIG. 1 as viewed from the propeller direction, but is shown in a partial cross section so as to show a slide fitting mechanism according to the present invention. That is, the propeller 7 is power-transmitted by the chain 10 to give a flow to the water in the tunnel 2 of the hull, and to easily move the hull in the lateral direction. As shown in FIG. 1, the thruster for this is fixed by fixing the fixed plate 5 to the flange portion 4 of the hull with bolts and nuts via the flange portion 33 of the support case 16 of the side thruster. Fixed to the hull 1. And it is sealed with water by the O-ring 32.

Further, as shown in FIG. 2, the arm case 16 is sealed with the drive system case 17 by an O-ring 31, and the arm case 16 and the drive system case 17 can slide with each other. The bolt 21 fixed to the drive system case 17 by the pin 20 can penetrate the flange member 13 as shown in the figure, and can be stopped at a desired position by rotating the nuts 23 and 24 above and below. The pin 20 is a fixing pin for preventing rotation such as a bolt.

FIG. 3 is an enlarged sectional view of a part of FIG. 1 to show a method of fixing the arm case 16. That is, a flange member 13 is provided around the supporting arm case 16, bolt holes are provided on both sides thereof, that is, at a plurality of locations, nuts 15 and bolts 14 are provided, and the fixing member 5 is penetrated.
It is fixed to a threaded hole 34 provided in a flange portion 33 of the support case 16. Further, the bolt 14 includes a collar member 35 in order to maintain a space between the flange member 13 and the fixing plate 15 at a predetermined position.

Further, between the fixing plate and the arm case 16,
An O-ring 32 is provided to seal from seawater. Also,
An O-ring mechanism 31 seals between the support case 16 and the drive system case 17. That is, the O-ring 31
Has the function of preventing leakage of lubricating oil. Oil is contained in the inside of the arm case 16.

FIG. 4 is an enlarged view showing the slide fitting mechanism according to the present invention in detail.
FIG. 2 is an enlarged cross-sectional view taken along a plane passing through 0, 21, 23, and 24, but is a cross-sectional view as viewed from the same direction as FIG. 20,
21, 23, and 24 are 13, 14, 15 shown in FIG.
3 is different from FIG. 3 in the cut surface.

That is, the bolt 21 fixed to the drive system case 17 by the pin 20 penetrates through the flange member 13 and adjusts the two nuts 23 and 24 to appropriate positions as shown in FIG. The position and height of the arm case 16 can be adjusted. Therefore, the chain 10 is connected to the chain pinions 9, 9 'and the chain wheels 11, 11'.
After that, rotate the nuts 23 and 24,
When the height difference between the drive system case 17 and the arm case 16 is adjusted, that is, when the nuts 23 and 24 are lowered, the height difference between the drive system case 17 and the arm case 16 increases, and the chain 1
The tension applied to zero can be increased, and the height of the arm case 16 can be adjusted, whereby the chain tension can be adjusted.

As can be seen from the drawing, the bolt and nut mechanisms provided on both sides of the supporting arm case 16 can be adjusted independently. Therefore, for example, it is easy to equalize the tension applied to the chain 10 by adjusting the illustrated left and right bolt and nut mechanisms. The support case 16 has a structure that can be freely slid by the O-ring mechanism 31 between the support case 16 and the drive system case 17.

The drive shaft 12 driven by the hydraulic motor 18 is fixed to a drive system case 17 by a bearing mechanism as shown in the figure.

Therefore, with the structure of the marine side thruster of the present invention, adjustment and repair after installation, which were almost impossible in the past, can be easily performed.

[0035]

The structure of the marine side thruster of the present invention has the following technical effects by the structure shown in the drawing. That is, firstly, it is possible to obtain a marine side thruster capable of adjusting the tension even after the chain used for power transmission of the side thruster is stretched, and in particular, increasing and equalizing the tension of the stretched chain. Was done. Second
In addition, a structure that can be easily attached and detached without requiring an oversized mechanism and that can appropriately provide the tension of the drive chain is obtained.

Third, the present invention provides a side thruster structure which is separable, can be easily attached to and detached from a hull, and can be easily repaired. Fourth, even when there are a plurality of chains, the tension applied to the chains can be easily equalized. That is, even in the configuration using the chain connection, the error and the difference in elongation with time can be easily corrected and compensated. That is, even if the imbalance occurs in the load sharing between the two chains, the structure can be easily corrected. It is. Fifth, the present invention provides a structure of a marine side thruster that can be simplified and has a simple structure as a drive mechanism, so that cost can be easily reduced.

[Brief description of the drawings]

FIG. 1 is a partial sectional view for explaining an example of the structure of a marine side thruster according to the present invention.

FIG. 2 is a side view of the structure of the marine side thruster of FIG. 1 as viewed from the side.

FIG. 3 is an enlarged sectional view in which a part of FIG. 1 is enlarged.

FIG. 4 is an enlarged sectional view of the side thruster of FIG. 1 viewed from a different plane from FIG. 3;

[Explanation of symbols]

Reference Signs List 1 Side thruster installation part of hull 2 Side thruster tunnel 3 Side thruster grid 4 Side thruster mounting flange (hull) 5 Fixing plate 6 Mounting bolt and nut 7 Propeller 8 Propulsion shaft 9 Chain pinion 10 Drive chain 11 Drive chain wheel 12 Hydraulic Drive shaft 13 Flange member 14, 15 Support arm case fixing bolt and nut 16 Chain storage support arm case 17 Hydraulic drive shaft storage case 18 Hydraulic motor 20 Fixing pin 21 Height adjustment bolt 23, 24 Flange height adjustment nut 30 Propulsion shaft storage Case 31, 32 O-ring mechanism 33 Flange part of arm case

Continuation of the front page (56) References JP-A-52-35095 (JP, A) JP-A-49-110095 (JP, A) JP-A-54-67996 (JP, A) JP-A-6-174021 (JP) JP-A-6-6953 (JP, A) JP-A 63-22453 (JP, U) JP-A 63-177347 (JP, U) JP-A 2-105913 (JP, U) JP-A 48-5184 (JP, U) Japanese Utility Model 62-25999 (JP, Y2) US Patent 3,707,939 (US, A) UK Patent 9,860,95 (GB, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) B63H 25/42 F16H 7/14

Claims (3)

(57) [Claims] 1. A marine side thruster in which a screw propeller type propulsion device is provided in a tunnel provided below a water line and penetrating a hull, wherein a chain wheel is fixed to a propulsion shaft on which the propulsion device is mounted. A drive shaft mounted on a drive source provided outside the tunnel is disposed in parallel with the propulsion shaft, and a chain pinion is also fixed to the drive shaft, so that a drive shaft is connected between the chain wheel and the drive shaft chain pinion. A propulsion shaft case for a propeller having a chain through hole therein and a support arm case extending toward the drive shaft case. A slide fitting mechanism is provided between the propulsion shaft case and the drive shaft case, and the height of the propulsion shaft case can be adjusted to adjust the tension of the stretched chain. The marine side thruster, characterized in that: 2. The marine side thruster according to claim 1, wherein the slide fitting mechanism comprises an O-ring mechanism, a fixing nut and a bolt combination mechanism. 3. The marine side thruster according to claim 1, wherein the propulsion shaft case has a flange member, whereby the propulsion shaft case is detachably connected to a tunnel upper wall portion.