JPH0229892U

JPH0229892U -

Info

Publication number: JPH0229892U
Application number: JP10882288U
Authority: JP
Priority date: 1988-08-18
Filing date: 1988-08-18
Publication date: 1990-02-26
Anticipated expiration: 2003-08-18
Also published as: JPH0615834Y2

Description

[Brief explanation of drawings]

第１図はこの考案に係るウオータジエツト推進
装置の、バケツトを小型滑走艇の前進位置にした
状態の縦断面図、第２図はバケツトを静止位置に
した状態の縦断面図、第３図はバケツトを後進位
置にした状態の縦断面図、第４図は第１図の―
線矢視図、第５図は第３図の―線矢視図、
第６図はバケツトの操作シフトレバーを示す正面
図、第７図はバケツトと操作シフトレバーとの分
解斜視図、第８図は従来のウオータジエツト推進
装置の一例を示す縦断面図である。１……船体、２……ダクト、４……インペラ、
５……ポンプケーシング、６……ポンプノズル、
７……凹所、８……ステアリングノズル、８ａ…
…後面側の噴射口、８ｂ……下面側の噴射口、１
０……ポンプカバー、１０ａ……支持部材、１２
……バケツト、１５……操作シフトレバー。 Figure 1 is a longitudinal cross-sectional view of the waterjet propulsion system according to this invention, with the bucket belt in the forward position of a small personal watercraft, Figure 2 is a vertical cross-sectional view with the bucket jet in the rest position, and Figure 3 is a vertical cross-sectional view of the water jet propulsion device with the bucket jet in the forward position of a small personal watercraft. A vertical cross-sectional view of the vehicle in the reverse position, Figure 4 is the same as in Figure 1.
Figure 5 is a view from the line arrow in Figure 3.
FIG. 6 is a front view showing the operating shift lever of the bucket cart, FIG. 7 is an exploded perspective view of the bucket cart and the operating shift lever, and FIG. 8 is a longitudinal sectional view showing an example of a conventional water jet propulsion device. 1...hull, 2...duct, 4...impeller,
5...Pump casing, 6...Pump nozzle,
7... Recess, 8... Steering nozzle, 8a...
...Injection port on the rear side, 8b...Injection port on the bottom side, 1
0... Pump cover, 10a... Support member, 12
...Bucket, 15...Operation shift lever.

Claims

[Claims for Utility Model Registration] 1. An impeller connected to an engine via a drive shaft, a pump casing surrounding the impeller, a pump nozzle connected to the pump casing, and a pump nozzle that rotates horizontally. In a water jet propulsion device equipped with a steering nozzle rotatably mounted on a shaft, the rear part of the steering nozzle is formed into an inverted U shape when viewed from the rear, and injection ports are provided on the rear side and the bottom side, and A recess with the rear and lower surfaces open is provided at the rear end, at least a part of the steering nozzle is inserted into the recess, and a bucket for forward/reverse switching having a semi-circular cross section is inserted in the vertical direction. When the bucket is in the uppermost position, the injection port on the rear side of the steering nozzle is opened, and when the bucket is in an intermediate position, the injection port on the rear side of the steering nozzle is opened. A water jet propulsion device characterized by being covered with a bucket belt, and further configured such that when the bucket jet is at the lowest position, the rear lower part of the injection port on the rear side of the steering nozzle and the injection port on the lower side are covered with the bucket. 2. A pump cover is attached to the hull from the lower surface of the pump casing to the recess, and on supporting members erected on both sides of the rear end of the pump cover,
2. A water jet propulsion device according to claim 1, wherein said bucket cart is pivotally mounted to be rotatable in the vertical direction.