JPS61244692A - Small speedboat - Google Patents

Abstract

PURPOSE:To reduce effects given to the balance of a hull by changes of the storage quantity of fuel, oil, etc. in a tank by arranging a storage tank main body of fuel, engine oil, etc. directly in front of a bulkhead in an engine room. CONSTITUTION:A fuel tank 9 is constituted with a tank main body 9a and an auxiliary tank section 9b, and the tank main body 9a is arranged directly in front of a bulkhead 8 in an engine room 2'. The auxiliary tank 9b is extended backward across the upper end of the bulkhead 8 from the tank main body 9a and is buried in a foaming material 5. A semi-circular opening section 10, with its lower end opened, is provided at the front half portion of the bottom section of the tank main body 9a, and this opening section 10 is concurrently used as the cover body of a coupling 20.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a tank for storing fuel and engine oil i for a small personal watercraft that glides on water using a propulsion device using a gasoline engine or the like. .

(Prior Art) Conventionally, in this type of small personal watercraft, a fuel tank has been installed at the front end in the engine room, and therefore, changes in the amount of fuel in the tank affect the longitudinal balance of the hull. was.

In particular, small personal watercraft like this are often used primarily for leisure sports, and are frequently operated with intensity such as sharp turns and sudden starts, so it is necessary to maintain a stable balance by keeping the center of gravity constant. It is desirable to

In addition, engine room disease is subject to limitations on the capacity of the fuel tank due to the fact that various equipment, including the engine and its auxiliary equipment, are installed.

(Problems to be Solved by the Invention) This invention has been made in view of the above-mentioned points, and by arranging the tank at or near the center of gravity of the ship, the storage capacity of fuel and oil in the tank can be reduced. The purpose of this project is to provide a tank that can eliminate the effects on the balance of the hull and the balance of the ship.

In addition, the bottom of the tank is equipped with a
Serves as a cover for the coupling between the engine drive shaft and the impeller shaft, LI:, 4::
:2〒22ににnee, 7.6. By overhanging the tank, the purpose is to increase tank capacity and enable long-duration navigation.

(Means for solving the problem) “The structure of this invention that achieves the above object is a small size with engine oil in front of the PAL outer head located approximately in the center of the hull, and a seat in the center of the deck behind it. In a personal watercraft, a tank main body for storing fuel, engine oil, etc. is provided immediately in front of the bulkhead in the engine room, and a coupling connects a part of the bottom of the tank main body to an engine drive shaft and an impeller shaft. The gist is that the cover is integrally formed with the cover.

(, Function □) According to the small personal watercraft of the present invention, even if the amount of fuel, oil, etc. stored in the tank changes significantly, the center of gravity of the entire ship hardly changes. A portion acts as a coupling cover.

(Example) Below, examples of this invention will be explained based on the drawings.
I will clarify.

Figure 1 is a central sectional view of a small personal watercraft, Figure 2 is the n of Figure 1.
-tr line sectional view, the third is a perspective view of Tajik.

In FIG. 1, 21 is a small personal watercraft, and equipment such as an engine 3 is mounted in an engine room 2' in the front half of the hull 2.

Reference numeral 4 denotes a deck inside the engine room 2, and a pedestal 5 for a seat 6 is formed in the center of the deck 4 in an upwardly protruding manner.

A seat 6 is attached to the rear end of the pedestal 5 with its rear end held by a pivot fitting 7, so that the seat 6 can be rotated backwards and upwards.

Further, a bulkhead 8 is attached to the boundary between the inside of the deck 4 and the engine room 2°, and the empty spaces in the deck 4 and the pedestal 5 are filled with foam materials 4° and 5° as buoyant bodies.

9 is a fuel tank consisting of a tank body 9a and an auxiliary tank part 9b, and the tank body 9a has a side strip mounting band (not shown) located just before the bulkhead in the engine room 2'.
The auxiliary tank part 9b is fixed to the bulkhead 8 through the tank body 9a and extends rearward beyond the upper end of the bulkhead 8. will be buried in , .

Furthermore, as shown in detail in FIGS. 2 and 3, a semi-circular opening 10 with an open lower end is provided in the first half of the bottom of the tank body 9a, and this opening 10 is provided with a cup which will be described later. Also serves as an integral part of the ring cover. Further, an insertion hole 11 for an impeller shaft, which will be described later, is formed by the hole wall, penetrating inside the tank body 9a from the center portion of the opening 10 toward the rear. Reference numeral 12 denotes a cable insertion hole, which will be described later, and this insertion hole 12 is formed by a hole wall and passes through the tank body 9a at an angle rearward and downward from the center of the upper surface of the tank body 9a. 13 is an oil supply pipe for tank 9, and this oil supply pipe 1
3 is provided protrudingly within the front end of the bottom of the seat 6. Therefore, the refueling operation is performed with the seat 6 opened upward. Reference numeral 14 denotes a fuel outlet, and this outlet 14 is provided on one side of the upper surface of the tank body 9a, and is connected to the fuel vibrator 14a.
is sent to a carburetor (not shown).

In FIG. 1, reference numeral 15 denotes a jet propulsion device installed at the stern of the ship's bottom, and a steering nozzle 16 that can swing left and right is provided at the rear end of this propulsion device 15. This nozzle 16 is connected via a cable 18 to a handle 17 provided on the upper surface of the substantially central portion of the hull 2, and the cable 18 is passed through the insertion hole 12.

Reference numeral 19 denotes an impeller shaft of the propulsion device 15, and the impeller shaft 19 passes through the bulkhead 8 and the insertion hole 12 and is connected to the drive shaft 3a of the engine 3 by a coupling 20. is located just within said opening 10 and said opening 1
0 acts as a coupling cover to prevent water collected at the bottom of the engine room from scattering to the surroundings when the coupling rotates 20 times. Also,
Reference numeral 21 is a bearing for the impeller shirt eye 9, and this bearing 21
is disposed within the insertion hole 11.

In this embodiment, the tank 9 is constructed as a fuel-only tank, but a part of the tank 9, for example, the auxiliary tank section 9b, is separated from the tank main body 9a, and a dedicated oil filler port is provided so that it can be used for engine oil. It may also be configured as a tank.

(Effects) As explained above, since the small personal watercraft of the present invention has the above-described configuration, it has the following effects.

(1) Since the tank body is located at or near the center of gravity of the ship, even if the amount of fuel or oil stored in the tank changes significantly, the center of gravity of the ship as a whole will not change.
Therefore, there is no effect on driving and running.

(2) The bottom of the tank can also be used as a cover for the coupling between the engine drive shaft and the impeller shaft in the engine room.

(3) Since a part of the tank is formed by extending rearward from the engine room, the space occupied by the tank in the engine room is reduced compared to a conventional tank with the same tank capacity, and conversely, it Compared to other ships, the tank capacity can be significantly larger, making it possible to sail for longer periods of time.

[Brief explanation of the drawing]

FIG. 1 is a central sectional view of a small personal watercraft showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line nn in FIG. 1, and FIG. 3 is a perspective view of a tank. 1...Small planing boat, 2...Hull, 2゛...Engine room, 3...Engine, 4...Deck, 6...
・Seat, 9...tank, 9a...tank body, 9
b... Auxiliary tank part, 10... Semicircular arc opening, 2
0...Coupling.

Claims (2)

[Claims] (1) In a small personal watercraft that has an engine room in front of the bulkhead at approximately the center of the hull and a seat in the center of the deck behind it, fuel, engine oil, etc. are stored in the engine room just ahead of the bulkhead. A small personal watercraft characterized in that a tank body is provided and a part of the bottom of the tank body is formed as a cover body of a coupling that connects an engine drive shaft and an impeller shaft. (2) The small personal watercraft according to claim 1, wherein an auxiliary tank portion extends from the tank body beyond the upper end of the bulkhead and overhangs between the seat and the deck.