JPH06156379A - Reduction gear for jet propulsion boat - Google Patents

Abstract

PURPOSE:To enable bucket operations for deceleration with an operating handle held as is. CONSTITUTION:In a jet propulsion boat equipped with a jet propulsion engine which produces propulsive force by sucking water in from the ship's bottom so as to jet water afterward through a nozzle, a bucket 8 which decelerates the boat by leading water jetted out of the nozzle 7 forward, is mounted in such a way that the outlet of the nozzle 7 is opened/closed. A closing-force transmitting means for opening/closing the bucket 8 is provided, and an operating handle 2 is provided with a throttle lever 22 for operating the jet propulsion engine, and with an operating lever 24 for opening/closing the aforesaid bracket 8 through the closing force transmitting means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed reducer for a jet propulsion watercraft equipped with a jet propulsion device which sucks water from the bottom of the ship and jets the water rearward through a nozzle to generate a propulsive force.

[0002]

2. Description of the Related Art Recently, jet propulsion boats, which are equipped with jet propulsion devices and are capable of gliding on water and performing various movements, have been widely used. A bucket designed to generate a braking force by receiving water jetted from a nozzle and guiding it forward is attached to the jet propulsion boat so as to open and close the outlet of the nozzle. I am trying to brake.

[0003]

The jet propulsion boat slides on the water at a high speed, and releases the hand holding the operation handle to operate the bucket in order to perform various movements such as a sharp turn. This is inconvenient for driving.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and provides a speed reducer for a jet propulsion boat which allows a driver to operate a bucket while holding an operation handle. That is the purpose.

[0005]

The present invention relates to a jet propulsion watercraft equipped with a jet propulsion device which sucks water from the bottom of the ship and jets the water rearward through a nozzle to generate a propulsion force. A bucket for generating a deceleration force of the boat by guiding the water to the front is attached so as to open and close the outlet of the nozzle, an opening and closing force transmitting means for opening and closing the bucket is provided, and the opening and closing force is provided on the operation handle. An operation lever for opening and closing the bucket is provided via a transmission means.

The operating handle is formed such that the grip portion is projected to both sides, a throttle lever for operating the engine of the jet propulsion machine is provided near one grip portion, and the operation lever is near the other grip portion. It is preferable that the configuration is provided.

[0007]

In the above structure, since the operation handle is provided with the operation lever for opening and closing the bucket, when the bucket is closed to decelerate the hull, the driver holds the operation handle while holding the operation lever. The operation handle can be operated, and therefore, the operation of the operation handle at the time of turning can be performed very easily.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a hull member 1 constituting a ship bottom plate.
1 and the deck member 12 constituting the deck are FR
The hull 1 is configured integrally with P or the like, and they are joined together at the peripheral edge portion 13. A seat 3 is formed on the center line of the hull 1 on the rear side of the center of the deck, and both sides of the seat 3 are recessed to form a foot deck 4.
The outer side thereof further rises to form a gun flannel 5. The seat 3 is a deck member 1 between the foot decks 4.
2 is composed of a seat base 41 formed upright and a cushion body 30 installed thereon. An operation handle 2 installed on a handle base 14 is provided on the front side of the seat 3 and a grip portion of the operation handle 2 is formed so as to project to both sides. A throttle lever 22 is provided near one grip portion 21. An operating lever 24 for a speed reducer, which will be described later, is provided near the other grip 23. A person sitting on the seat 3 places his / her foot on the foot deck 4 and holds the operation handle 2 to drive.

The speed reducer is constructed as shown in FIGS. That is, the nozzle 7 is attached to the rear portion of the jet propulsion device main body 6 so as to be rotatable around a vertical axis 72,
Buckets 8 are attached to both front side portions of the nozzle 7 so as to be rotatable around a horizontal shaft 82. The nozzle 7 has an outlet 70 that opens rearward, and a flow path 71 that opens forward is formed in the lower portion of the nozzle 7.
Is configured so that it can close the outlet 70 of the nozzle as shown in FIG. A pair of springs 77 are connected to the front end portion of the bucket 8, and the other end portion of the spring 77 is connected to a fixing member 67 attached to the jet propulsion machine main body 6, and the spring 77 causes the bucket 8 to move toward the bucket 8. The counterclockwise rotating force is applied to retract the bucket 8 above the nozzle 7.

Further, one end of an inner cable 75 of a push-pull cable is connected to the front end of the bucket 8 through a locking pin 76, and an outer pipe 79 of the push-pull cable is used for the jet propulsion machine main body 6 and other appropriate parts. The other end of the inner cable 75 is connected to one end of the transmission link 74. An intermediate portion of the transmission link 74 is held by a support shaft 73 so as to be rotatable about its axis, and one end of a transmission cable 28 is connected to the other end of the transmission link 74. The other end of the transmission cable 28 is guided to the operation handle 2 and connected to an operation lever 24 installed near the grip portion 23, which constitutes an opening / closing force transmission means. The operating lever 24 is the throttle lever 22.
Is formed longer than.

The length of the arm from the rotation center (support shaft 73) of the transmission link 74 is shorter on the transmission cable 28 side than on the inner cable 75 side, so that the operation stroke of the operation lever 24 is short. The bucket 8 can be moved largely so that a large deceleration force can be obtained in a short time. Further, instead of the push-pull cable or the like as the transmission means, a hydraulic system such as a hydraulic means or a hydraulic cable may be adopted.

In the above structure, a person sits on the seat 3 and puts his / her feet on the foot deck 4 and grips the grips 21 and 23 of the operation handle 2 to drive the hull 1 to run. When the jet propulsion device is driven, water is introduced from the bottom of the ship and the water is jetted backward from the outlet 70 of the nozzle 7 to drive the hull 1, and the operating handle 2 is operated to transmit a transmission means (not shown). The nozzle 7 is rotated around the shaft 72 via the to direct the nozzle 7 in a predetermined direction, and the hull 1 is swung. The throttle lever 22 is operated with the hand holding the grip portion 21, and the operation lever 24 is operated with the hand holding the grip portion 23.

When the operating lever 24 is operated by being pulled in the direction shown by the arrow in FIG. 2, the operating lever 24 is pulled by the transmission cable 28 and the transmission link 74 is moved around the support shaft 73 as shown by the phantom line in FIG. It rotates clockwise, which causes the bucket 8 via the inner cable 75 to rotate clockwise against the force of the spring 77, thereby closing the outlet 70 of the nozzle 7 as shown in FIG. become.
Therefore, the water sprayed into the nozzle 7 is blocked by the bucket 8 and is sent forward through the flow path 71. Therefore, the forward propulsive force disappears, and the rearward propulsive force is generated, so that the hull 1 is decelerated or braked. When the user releases the operating lever 24, the force of the spring 77 causes the bucket 8 to rotate counterclockwise, return to the position shown in FIG. 3, and enter the forward drive state. It should be noted that the flow path 71 is not formed in the nozzle 7 and a gap is formed between the outlet 70 of the nozzle and the bucket 8 in the closed state so that water can be sent forward from this gap. May be.

Since the operation lever 24 for operating the speed reducer is installed near the grip portion 23 of the operation handle 2 as described above, the driver operates the operation lever 24 while holding the grip portion 23. It can be carried out and therefore the operation can be carried out quickly and safely.

[0015]

As described above, according to the present invention, since the operation handle is provided with the operation lever for opening and closing the bucket, when the bucket is closed and the hull is decelerated, the driver is Since the operation lever can be operated while holding the operation handle, it is possible to operate the operation handle when turning, for example, very easily.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire hull showing an embodiment of the present invention.

FIG. 2 is a plan view of a speed reducer.

FIG. 3 is a side view illustrating a forward operation state of a bucket portion of the speed reducer.

FIG. 4 is a side view illustrating a decelerating operation state of a bucket portion of the reduction gear transmission.

[Explanation of symbols]

 1 Hull 2 Operation Handle 3 Seat 6 Jet Propulsion Machine Main Body 7 Nozzle 8 Bucket 21, 23 Grip 22 Throttle Lever 24 Operation Lever

Claims (2)

[Claims] 1. In a jet propulsion boat equipped with a jet propulsion device that generates a propulsive force by sucking water from the bottom of the ship and injecting the water rearward through a nozzle, guiding the water jetted from the nozzle forward. A bucket for generating the deceleration force of the boat is attached so as to open and close the outlet of the nozzle, and an opening / closing force transmitting means for opening / closing the bucket is provided. A speed reducer for a jet propulsion boat, which is provided with an operating lever for opening and closing. 2. The operating handle is formed such that a grip portion is projected to both sides, a throttle lever for operating an engine of a jet propulsion machine is provided near one grip portion, and the operation portion is near the other grip portion. The speed reducer for a jet propulsion watercraft according to claim 1, further comprising a lever.