JPH05330486A - Water jet propulsion device - Google Patents

Abstract

PURPOSE:To provide watertightness in a simple and sure manner of a housing connecting part to a hull part and facilitate the visual confirmation of the water suction side through a housing. CONSTITUTION:A mount rubber 30 of U-shaped section is mounted on end parts 8A, 9A of the respective walls forming holes 10, 11 of a bottom wall 8 and a stern wall 9, and connected by using bolt 33 so as to hold the mount rubber 30 by the housing end parts 1A, 1B and a suppressing member 32. A water suction port inspecting means where the water suction port 5 side can be visually confirmed from above is provided, and this water suction port inspecting means is provided at the position which is deviated by the specified angle relative to the axial line of the transmission shaft 2 and the perpendicular line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jet propulsion device, and more particularly, to improvement of a housing connecting structure constituting the water jet propulsion device.

[0002]

2. Description of the Related Art In a water jet propulsion device that obtains propulsive force by rotating an impeller, the impeller and a transmission shaft that supports the impeller are housed in a housing, and the housing is formed in a bottom wall and a stern wall, respectively. The holes are connected so as to communicate with each other.

FIG. 11 shows a conventional example of the water jet propulsion device. In this figure, the propulsion device includes a housing 1, a transmission shaft 2 housed in the housing 1, and an impeller 3 provided on the outer peripheral surface side of the transmission shaft 2. The transmission shaft is connected to an output shaft of an engine (not shown), and the driving of the engine causes the transmission shaft 2 and the impeller 3 to rotate, so that the water absorbed from the water intake port 5 can be drained from the drain port 6. ing.

The housing 1 is connected so as to communicate between the holes 10 and 11 formed in the bottom wall 8 and the stern wall 9, and the housing 1 and the walls 8 and 9 are connected to each other. The sealant 13 is applied, and the sealant 13 is used to prevent water from entering the ship.

A water inlet inspection means 15 is provided on the upper portion of the housing 1 so that the water inlet 5 side can be visually recognized. The water inlet inspection means 15 is provided with a hole 16 formed in the housing 1, a cylindrical portion 17 protruding upward so as to surround the hole 16, and locked to an upper end of the cylindrical portion 17. The cover member 20 fixed by the wing nut 18 is removed, and the cover member 20 is removed to inspect for clogging of foreign matter in the sea clogged in the protective member 21 such as a lattice installed in the water inlet 5. However, the necessary removal work can be performed.

[0006]

However, in the water jet propulsion device in the conventional example,
There were the following inconveniences.

That is, since the housing 1 is connected through the sealant 13, it is possible to prevent water from entering the ship to some extent. However, the application of the sealant 13 is required. Is troublesome,
Since the sealing effect greatly depends on the coating technique of the operator, there is a disadvantage that the sealing effect varies depending on the coating operator. Moreover, once the housing 1 is joined, the housing cannot be easily removed, which makes the work difficult when a repair work or the like becomes necessary. Further, since the vibration generated in the propulsion device during traveling is directly transmitted to the hull, there is a disadvantage that it causes noise and vibration of the hull.

Further, since the water inlet inspection means 15 is located right above the transmission shaft 2, when the lid member 20 is removed and the water inlet 5 side is viewed, the transmission shaft 2 can see its field of view. There is an inconvenience of partially blocking the view. In particular, as shown in FIGS. 12 and 13, when the transmission shaft housing 24 surrounding the transmission shaft 2 is provided, the view is further blocked and the water intake port 5 side is blocked. It was difficult to see. Therefore, the water intake 5
There is an inconvenience that it is not possible to clearly confirm the state where foreign matter such as seaweed is clogged in the protective member 21 provided on the side.

[0009]

SUMMARY OF THE INVENTION The first object of the present invention is to improve the disadvantages of the conventional example, and in particular, it is possible to maintain a constant waterproof effect of the housing connecting portion with respect to the ship bottom wall and the stern wall, and to easily remove the housing. To be able to
Another object of the present invention is to provide a water jet propulsion device capable of absorbing noise and vibration generated by the propulsion device as much as possible.

A second object of the present invention is to make it easier to inspect or remove foreign matter from the protective member provided on the water intake side by making it visible with a wider field of view when inspecting the water intake side. It is to provide a water jet propulsion device expected to come.

[0011]

According to the present invention, there is provided a housing connected so as to communicate between the holes provided in the bottom wall and the stern wall, and a transmission shaft housed in the housing.
With an impeller provided on the outer peripheral surface side of this transmission shaft,
In the water jet propulsion device that obtains a predetermined propulsive force by the rotation of the impeller, the housing is coupled with a mount rubber interposed at least at the coupling portion between the bottom wall and the housing. This is intended to achieve the first object.

Further, according to the present invention, water inlet inspection means for visually recognizing the water inlet side is provided in the housing portion above the transmission shaft, and the central axis of the water inlet inspection means is perpendicular to the axis of the transmission shaft. Is provided so as to extend at a predetermined angle with respect to the axis line intersecting with the
To achieve the purpose of.

[0013]

With the mount rubber interposed between the bottom wall of the ship and the housing, water can be surely prevented from intruding from the part, and noise and vibration of the propulsion device can be absorbed. Is effectively avoided. In addition, even if the water jet propulsion device is provided with a transmission shaft housing, the water intake side can be visually recognized without being blocked by the transmission shaft housing, by arranging the water intake port inspection means at a predetermined angle. You can

[0014]

Embodiments of the present invention will be described below with reference to the drawings. Here, the same reference numerals will be used for the same or equivalent components as those of the conventional structure, and the description thereof will be omitted or simplified.

FIG. 1 shows an overall schematic configuration showing an embodiment of the present invention. For convenience of explanation, the suction port inspection means is shown in a mode not shown. In this figure, the end portion 8A forming the hole 10 of the ship bottom wall 8 is
The mount rubber 30 is provided so as to be slightly recessed in the ship via the step portion 8B, and a mount rubber 30 having a U-shaped cross section is mounted so as to surround the end portion 8A. On the other hand, the mount rubber 30 is similarly attached to the formation end portion 9A of the hole 11 of the stern wall 9.

As shown in FIG. 2, the mount rubber 30 has a rectangular opening 30A and is formed into a closed loop shape as a whole, and is bent halfway to form a horizontal portion 30B and an inclined portion 30C. It has a shape with. The horizontal portion 30B is attached to the end portion 8A of the ship bottom wall 8 and the inclined portion 30B is attached to the end portion 9A of the stern wall 9. The outer surface of the mount rubber 30 on the inner side of the ship is joined in a state where the end portions 1A and 1B of the housing 1 are in contact with each other, and the outer surface of the outer side of the ship cooperates with the housing end portions 1A and 1B to mount rubber 30. The holding member 32 for sandwiching is held together. Then, the housing ends 1A and 1B and the pressing member 32
And are firmly connected by a bolt 33.

The pressing member 32 is provided by die casting in this embodiment, and as shown in FIG. 3, has a plurality of pieces having a shape substantially corresponding to the mount rubber 30. Each of these pieces corresponds to the mount rubber 30.
It has a shape including a thin wall portion 32A that sandwiches the wall portion and a thick wall portion 32B that has a surface that directly abuts and is coupled to the housing end portions 1A and 1B. A plurality of bolt insertion holes 32C are formed in the thick portion 32B.
The bolt 33 is inserted into C.

Therefore, according to the above construction in which the mount rubber 30 is interposed in the joint portion, the work of applying the sealant can be eliminated, and a constant waterproof effect can be obtained as compared with the sealant. There is. Further, since the mount rubber 30 has the entire shape forming the closed loop as described above, it can be easily attached and detached, and the effect that the attaching and detaching work in the maintenance and inspection work of the propulsion device can be performed easily and quickly. ..

Further, due to the elasticity characteristic of the mount rubber 30, it can be expected that noise and vibration generated from the propulsion device can be absorbed well.

In the embodiment shown in FIGS. 4 to 6, the mount rubber 30 as described above is attached only to the bottom wall 8 and the rubber seal member having a general shape is provided on the stern wall 9 side. An example in which 35 is provided is shown. Even with such an embodiment, it is possible to obtain substantially the same effect as the above-mentioned embodiment.

Next, a water inlet inspection means for visually recognizing the water inlet 5 side of the housing 1 will be described with reference to FIGS. 7 and 8. The mount rubber 30 is not shown here for convenience of description.

In FIG. 7, the transmission shaft 2 is housed in a transmission shaft housing 24. The transmission shaft housing 24
The water inlet inspection means 15 is arranged in the housing 1 portion which is the upper position of the. This water inlet inspection means 15
As shown in FIG. 8, a pair is provided at symmetrical positions with the transmission shaft 2 and the transmission shaft housing 24 interposed therebetween. The water inlet inspection means 15 in the present embodiment is provided at a position where its central axis C is inclined by a predetermined angle α with respect to an axis L perpendicular to the axis of the transmission shaft 2. The basic constituent members of each water inlet inspection means 15 are substantially the same as the conventional structure shown in FIGS.

Therefore, according to the water intake port inspection means 15 as described above, since the water intake port inspection means 15 is arranged with the inclination angle α,
It is possible to avoid the possibility that the field of view is blocked by the transmission shaft 2 or the transmission shaft housing 24 as in the conventional case, and the grid-like protective member 21 provided on the side of the water inlet 5 is clogged with foreign matter such as undersea suspended matter. There is an effect that it is possible to clearly see whether or not there is.

Moreover, in the present embodiment, since the water inlet inspection means 15 is provided at two locations, even if there is a region that cannot be visually recognized by one water inlet inspection means 15, the other water inlet inspection is performed. There is an effect that it can be clearly seen by the means. However, when the present invention is carried out, sufficient visual recognition can be expected without necessarily providing the water inlet inspection means at two locations.

As shown in FIG. 9, in the case of a water jet propulsion device of the type in which the water suction port 5 is divided into two, the same arrangement as that described above is obtained by the arrangement configuration shown in FIG. The effect can be obtained.

[0026]

The present invention is constructed as described above, and
As a result, it is possible to maintain a constant waterproof effect of the housing connecting portion on the ship bottom wall and the stern wall, absorb noise and vibration generated from the propulsion device as much as possible, and further inspect the water intake side. In this case, it is expected that it will be possible to more easily detect foreign substances in the protective member installed on the water intake side by making it visible with a wider field of view, and to provide a superior water jet propulsion device that has never existed before. can do.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a water jet propulsion device according to the present invention.

FIG. 2 is a perspective view showing a mount rubber in the embodiment.

FIG. 3 is a perspective view showing a mount rubber pressing member in the embodiment.

FIG. 4 is a schematic configuration diagram showing a modified example of the embodiment shown in FIG.

FIG. 5 is a perspective view showing a mount rubber according to the modified example.

FIG. 6 is a perspective view showing a mount rubber pressing member in the modified example.

FIG. 7 is an overall configuration diagram for explaining a water inlet inspection means according to the present invention.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a perspective view of the water intake port, which is divided into two parts and is viewed from below the hull.

10 is a cross-sectional view taken along the line BB of FIG.

FIG. 11 is a schematic configuration diagram showing a conventional water jet propulsion device.

FIG. 12 is a schematic configuration diagram for explaining a conventional water inlet inspection means.

13 is a cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

 1 Housing 1A, 1B Housing end 2 Transmission shaft 3 Impeller 5 Water intake 8 Ship bottom wall 8A End 9 Stern wall 9A End 10, 11 hole 15 Water intake inspection means 21 Protective member

Claims (2)

[Claims] 1. A housing coupled to communicate between holes provided in a ship bottom wall and a stern wall, a transmission shaft housed in the housing, and an impeller provided on an outer peripheral surface side of the transmission shaft. In a water jet propulsion device that obtains a predetermined propulsive force by the rotation of the impeller, a water jet propulsion device characterized in that the housing is coupled at least at a coupling portion between the ship bottom wall and the housing with a mount rubber interposed. apparatus. 2. A housing part at a position above the transmission shaft is provided with a water inlet inspection means capable of visually recognizing the water inlet side, and a central axis of the water inlet inspection means is an axis line perpendicular to the axis of the transmission shaft. The water jet propulsion device according to claim 1, wherein the water jet propulsion device is extended at a predetermined angle with respect to.