JPH07165186A - Vessel equipped with propulsion device - Google Patents

Abstract

PURPOSE:To provide a vessel equipped with a propulsion device which can increase the length and capacity of an exhaust system by utilizing the conventional members. CONSTITUTION:As for a vessel equipped with a propulsion device 6 which is constituted so that a box body bracket 2 is installed on a hull 1, and the propulsion device 6 is installed on the box body bracket 2, and an engine 9 is arranged in the upper part inside the casing 8 of the propulsion device 6, and the exhaust passage 12 of the engine 9 is installed in the lower part inside the casing 8, the exhaust passage 12 and the inside space 3 of the box body bracket 2 are allowed to communicate through a communication pipe 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship provided with a propulsion device on a box bracket provided on the hull.

[0002]

2. Description of the Related Art A ship is provided with a box bracket at the rear of a hull, a propulsion device is attached to the box bracket, an engine is arranged in an upper part of a casing of the propulsion device, and an engine is arranged in a lower part of the casing. Some have an exhaust passage.

In a ship equipped with a propulsion device as described above, an exhaust passage is provided, for example, inside a casing, and exhaust gas is mainly discharged into water at high speed, and exhaust gas is mainly discharged into the air at low speed to muffle noise. I am letting you.

[0004]

By the way, there are cases where it is desired to increase the length and capacity of the exhaust system in order to improve the sound deadening effect depending on the type of the propulsion device and the ship. Since the structure is formed, there is a certain limit in increasing the length and capacity of the exhaust system.

Therefore, for example, an exhaust pipe may be provided auxiliary to the outside of the casing, but the number of parts is increased and it is not preferable externally to attach the exhaust pipe.

The present invention has been made in view of the above problems, and an object thereof is to provide a ship provided with a propulsion device capable of increasing the length and capacity of an exhaust system by utilizing existing members. .

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a box bracket on a hull, and a propulsion device is attached to the box bracket. In a ship provided with a propulsion device having an engine arranged in an upper part and an exhaust passage of the engine in a lower part of the casing, the exhaust passage and the internal space of the box bracket are communicated with each other through a communication pipe. Is characterized by.

The invention according to claim 2 is characterized in that the internal space of the box bracket is communicated with the atmosphere or water.

According to the third aspect of the present invention, the propulsion device is configured to be tiltable up and down with respect to the hull about a laterally extending tilt shaft, while the communication pipe is flexible. It is characterized by being composed of a pipe.

[0010]

According to the first aspect of the invention, the existing box bracket is used by connecting the exhaust passage of the engine and the internal space of the box bracket to the lower part in the casing of the propulsion device through the communication pipe. Then, the length and capacity of the exhaust system are increased according to the model of the propulsion device and the ship to improve the silencing effect.

According to the second aspect of the present invention, the internal space of the box bracket is communicated with the atmosphere or water, and the length and capacity of the exhaust system are increased according to the type of the propulsion device and the ship to reduce noise. Is improving.

Further, in the third aspect of the present invention, since the communication pipe is made of a flexible pipe, the propulsion device can be smoothly tilted with respect to the hull.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a ship equipped with the propulsion device of the present invention will be described below in detail with reference to the drawings. 1 is a side view of a ship equipped with a propulsion device, and FIG. 2 is a rear view of a ship equipped with a propulsion device.

A box bracket 2 is provided on the hull 1 of a small boat, and the inside of the box bracket 2 is a space 3. A clamp bracket 4 is fixed to the box bracket 2. A swivel bracket 5 is attached to the clamp bracket 4 so as to be vertically rotatable about the tilt shaft 30, and a propulsion device 6 is attached to the swivel bracket 5 so as to be rotatable in the left-right direction. Is configured to be vertically tiltable with respect to the hull 1 about a tilt shaft 30 extending in the lateral direction. Also,
The propulsion device 6 is equipped with a propeller 7.

The propulsion device 6 has a casing 8,
An engine 9 is arranged in the upper part of the casing 8. A drive shaft 10 is connected to the engine 9. The drive shaft 10 is vertically arranged in a casing 8. The lower part of the drive shaft 10 is connected to a propeller shaft 11 via a forward / reverse switching mechanism (not shown). Axis 1
The propeller 7 is rotated by 1 to obtain the propulsion force. At the time of low speed of this ship, it is the position of the water surface L1, and at the time of high speed, it is the water surface L2.

An exhaust passage 12 is provided in the lower part of the casing 8, and exhaust gas is exhausted from the exhaust pipe 13 connected to the engine 9 to the exhaust passage 12. The exhaust passage 12 is provided with an exhaust expansion chamber 14 that communicates with outside water, and at high speed, exhaust gas from the exhaust expansion chamber 14 is mainly an underwater exhaust port 15.
Discharged into water. Further, an air exhaust port 16 communicating with the air is formed in the casing 8, and exhaust gas is exhausted into the air through the air exhaust port 16 at low speed.

The exhaust expansion chamber 14 of the exhaust passage 12 and the internal space 3 of the box bracket 2 are communicated with each other through a communication pipe 17, and the length and capacity of the exhaust system are increased according to the model of the propulsion device 6 and the vessel. This improves the sound deadening effect.
The communication pipe 17 is formed of a rubber bellows, and the communication pipe 17 expands and contracts or bends to allow the tilting and trimming operations of the propulsion device 6.

As described above, by using the existing box bracket 2, the length and capacity of the exhaust system can be increased according to the model of the propulsion device 6 and the vessel without increasing the number of parts. Further, since no exhaust pipe or the like is attached to the outside of the casing 8, it is not preferable in appearance. Further, since the communication pipe 17 is made of a flexible pipe, the propulsion device 6 can be smoothly tilted with respect to the hull 1.

In this embodiment, the communication pipe 17 is provided on the left side of the propulsion device 6 with respect to the traveling direction of the ship, but it may be provided on the right side or both the left and right sides.

An outlet 31 is provided on the lower surface of the box bracket 2.
Can be provided and this outlet 31 is provided on the hull centerline. As described above, by providing the outlet 31 on the lower surface of the box bracket 2, exhaust gas is less likely to be applied to the propulsion device 6, so that the propulsion device 6 can be prevented from becoming dirty. Further, since the exhaust gas is sucked by the water flow flowing along the lower surface of the box bracket 2, the exhaust can be smoothly performed.

On the rear surface of the box bracket 2,
An outlet 33 can be provided below the water surface L1 at low speed and above the cavitation plate 32, and the outlet 33 is also provided on the hull centerline. As described above, the outlet 33 is provided on the rear surface of the box bracket 2 and below the water surface L1 at low speed and above the cavitation plate 32.
By providing the exhaust gas, the exhaust gas is released into the water at a low speed, so that noise can be reduced. Further, the cavitation plate 32 can prevent the exhaust gas from flowing toward the propeller 7 side and the propeller 7 from entraining the exhaust gas, and the propulsion efficiency can be maintained high.

FIG. 3 is a side view of another embodiment of a ship equipped with a propulsion device. In this embodiment, the same structures as those in FIGS. 1 and 2 are designated by the same reference numerals and the description thereof will be omitted. In this embodiment, an underwater exhaust pipe 21 that communicates with water is provided at the bottom of the box bracket 2, and this underwater exhaust pipe 21
Alternatively, the internal space 3 may be communicated with water to increase the length and capacity of the exhaust system according to the model of the propulsion device 6 and the ship to improve the sound deadening effect.

[0023]

As described above, according to the first aspect of the invention, the exhaust passage of the engine and the internal space of the box bracket are communicated with each other through the communication pipe in the lower portion of the casing of the propulsion device. By using the box bracket,
The length and capacity of the exhaust system can be increased according to the model of the propulsion device and the ship without increasing the number of parts.
This improves the sound deadening effect and is also preferable in appearance.

According to the second aspect of the invention, since the internal space of the box bracket is communicated with the atmosphere or water,
Furthermore, the length and capacity of the exhaust system can be increased according to the model of the propulsion device and the vessel, which improves the silencing effect.

According to the third aspect of the present invention, since the communication pipe is made of a flexible pipe, the propulsion device can be smoothly tilted with respect to the hull.

[Brief description of drawings]

FIG. 1 is a side view of a ship equipped with a propulsion device.

FIG. 2 is a rear view of a ship equipped with a propulsion device.

FIG. 3 is a side view of another embodiment of a ship equipped with a propulsion device.

[Explanation of symbols]

 1 Hull 2 Box Bracket 3 Internal Space 6 Propulsion Device 8 Casing 9 Engine 12 Exhaust Passage 17 Communication Pipe

Claims (3)

[Claims] 1. A box bracket is provided on a hull, a propulsion device is attached to the box bracket, an engine is arranged in an upper part of a casing of the propulsion device, and an exhaust passage of the engine is provided in a lower part of the casing. A ship provided with the propulsion device, wherein the exhaust passage and the internal space of the box bracket are communicated with each other through a communication pipe. 2. The ship provided with the propulsion device according to claim 1, wherein the internal space of the box bracket is communicated with the atmosphere or water. 3. The propulsion device is configured to be tiltable up and down with respect to the hull about a tilt shaft extending in a lateral direction, and the communication pipe is configured by a flexible pipe. A ship provided with the propulsion device according to claim 1.