JPS642769B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to portable engine working machines such as generators, welding machines, and compressors that operate using a small engine (internal combustion engine) as a power source.

This type of portable engine working machine needs to be constructed as compactly as possible in order to improve portability and handling. In addition, quietness is required due to the location and time of use, and at the same time, it is common to cover the entire device with a box to protect it from rough handling.

In view of the above problems, the present invention has been devised to improve portability, ease of handling, and the arrangement of the engine, work equipment, auxiliary equipment attached to the engine, fuel tank, etc.
The purpose of the present invention is to obtain a small engine working machine that is quiet and effective in suppressing temperature rise inside a soundproof box.

In order to achieve the above object, the present invention includes an engine 1 and a working machine 2 driven by the engine 1.
In a portable engine working machine in which the output shaft of the engine 1 and the main shaft of the working machine 2 are coupled on the same axis and housed and supported in a soundproof box 5, the cylinder 1A of the engine 1 is connected in a plane orthogonal to the axis. At the same time, the muffler 3 is arranged in a space on the side where the cylinder 1A is inclined and is located at a higher position than the work equipment 2 on the side of the work equipment 2, and the muffler 3 and the above-mentioned Cooling air guide duct 12 and cover 11 that open the cylinder 1A to the outside of the soundproof box 5
By surrounding the muffler 3, a cooling air passage is formed to isolate the high-heat parts 1A and 3 from the internal space of the soundproof box 5. A fuel tank 4 is arranged in the space, and a power supply battery 23 for the starter motor is arranged in a space below the muffler 3 and to the side of the working machine 2.

Engine 1 carburetor 6, air cleaner 7,
The spark plug 8 etc. is installed in the inclined cylinder 1.
Work equipment 2 is placed next to the cylinder head 1B of A.
and on the opposite side.

The cooling fan 9 of the engine 1 is a fan cover 10
The suction port 10A of the fan cover 10 opens to the bottom surface 5A of the box 5. An air guide cover 11 surrounding the cylinder 1A is provided so as to be continuous with the fan cover 10, and the cooling air guide duct 12 surrounding the muffler 3 is continuous with the air guide cover 11. There is. The end of the duct 12 opens facing the exhaust hole 13 on the side of the box 5, and the tail pipe 3A of the muffler 3 protrudes from the side of the box 5.

The duct 12 is made of a heat-insulating and sound-insulating material such as a glass wool mat attached to a steel plate, and there is a ventilation gap between the muffler 3 and the duct 12.

A discharge port 15 of the cooling air taken in by the work machine 2 by the fan 14 is opened near the joint between the work machine 2 and the engine 1, and another duct is provided that communicates the discharge port 15 with the inside of the duct 12 surrounding the muffler 3. There are 16.

The box 5 is made of a steel plate, and a fuel supply port 1 covered with a lid 18 supported by a hinge 17 so as to be openable and closable is located directly above the tank cap 4A on the top surface.
9 is provided. Further, a door 20 for internal inspection is attached to the side surface of the box 5 on the side where the cylinder 1A is inclined so as to be openable and closable with a hinge 21.

When the working machine 2 is a generator or a compressor, a control device is attached, and the control device 22 is preferably placed in a wide space created above the engine 1 due to the inclination of the cylinder 1A.

A power source battery 23 for the starter motor is placed and supported on the bottom surface 5A of the box 5. The internal inspection door 20 also faces the front of the battery 23. The bottom surface 5A of the box 5 is reinforced by a bottom frame not shown in the figure. In the figure, reference numeral 24 denotes a moving wheel, which is equipped with a brake or a wheel stop. Reference numeral 25 denotes an intake hole provided at the lower side of the box 5 on the working machine 2 side, and may also be provided on the side of the fan cover 10 on the engine 1 side. 26, 27
is a ventilation hole provided using reinforcing channel material 28 attached to the top surface of the box 5 along the back surface thereof,
Both holes 26 and 27 are opened in a staggered manner. The heat trapped in the box 5 is transferred to the holes 26 and 27 by natural convection.
run away from

When the engine 1 is operated, the work equipment 2 is also operated, and the fan 9 on the engine side sucks outside air into the fan cover 10 from the suction port 10A, and transfers it to the air guiding cover 1.
The cylinder 1A, the cylinder head 1B, and the muffler 3 are cooled while being discharged from the exhaust hole 13 through a cooling air passage consisting of a duct 12 connected to the cylinder 1A and its cover 11. At the same time, the fan 14 on the work machine side
In addition, the cooling air that comes out of the exhaust port 15 cools the cylinder 1A and the cylinder head 1B, joins the cooling air that flows toward the muffler 3, and flows through the muffler. Participate in cooling step 3.

As described above, the portable engine working machine of the present invention has the following features:
A portable engine working machine in which an engine 1 and a working machine 2 driven by the engine 1 are housed and supported in a soundproof box 5 with the output shaft of the engine 1 and the main shaft of the working machine 2 connected on the same axis, engine 1
The cylinder 1A is arranged to be inclined laterally in a plane perpendicular to the axis, and the cylinder 1A is arranged sideways on the side where the cylinder 1A is inclined and the work machine 2 is located on the side of the work machine 2.
Since the muffler 3 is placed in a higher space, the exhaust passage from the cylinder 1A to the muffler 3 is shorter and the exhaust flow is directed upward, which eliminates resistance to the exhaust flow and improves engine performance. . The height of the space occupied by the engine 1 and the working machine 2 is reduced, and the overall height of the engine working machine including the muffler 3 is also kept low.

By surrounding the muffler 3 and the cylinder 1A with a cooling air guiding duct 12 and a cover 11 that open toward the outside of the soundproof box 5, the portion 1A that becomes hot,
3 from the internal space of the soundproof box 5, the cooling air passage also faces upward in parallel with the exhaust passage forming the upward piping, and the cooling air flows smoothly, resulting in good cooling efficiency. Therefore, the temperature rise in the working machine 2 and the soundproof box 5 due to radiant heat from the muffler 3 after the engine is stopped is small.

Since the fuel tank 4 is arranged in the space above the working machine 2 on the side of the part of the duct 12 that surrounds the muffler 3, the empty space above the working machine 2 can be used effectively, and engine work can be carried out. A large capacity fuel tank 4 can be installed without particularly increasing the height of the machine, and the packaging density inside the soundproof box 5 can be increased.

If the height of the soundproof box 5 allows, a part of the fuel tank 4 may be extended above the cooling air guide duct 12 surrounding the muffler 3, as shown in FIG. Capacity can be further increased.

Further, since the power source battery 23 of the starter motor is arranged below the muffler 3 by utilizing the space on the side of the working machine 2, the heavy battery can be stably supported on the bottom surface 5A of the box 5. The auxiliary equipment 6 to 8 related to the engine 1 other than the muffler 3 are located near the cylinder 1A and the cylinder head 1B, so there is no problem in downsizing the entire machine, and the space formed in the box 5 By making effective use of this, a small engine working machine with excellent portability, ease of handling, and quietness can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of a portable engine working machine of the present invention, FIG. 2 is a longitudinal sectional side view on the working machine side, and FIG. 3 is a longitudinal sectional side view on the engine side. 1 is a cylinder inclined type engine, 1A is a cylinder, 2 is a working machine, 3 is a muffler, 4 is a fuel tank,
5 is a box, 22 is a control device.

Claims (1)

[Claims] 1. In a portable engine working machine in which an engine and a working machine driven by the engine are housed and supported in a soundproof box with the output shaft of the engine and the main shaft of the working machine connected on the same axis, the cylinder of the engine is The muffler is arranged so as to be inclined laterally in a plane orthogonal to the axis, and the muffler is arranged in a space on the side where the cylinder is inclined and at a higher position than the work equipment on the side of the work equipment. By surrounding the cylinder with a cooling air guide duct that opens toward the outside of the soundproof box and a cover, a cooling air passage is formed that isolates the high-heat area from the internal space of the soundproof box, and surrounds the muffler of the duct. Portable engine work characterized by arranging the fuel tank in the space above the work machine on the side of the part where the engine is running, and arranging the power supply battery for the starter motor in the space below the muffler and on the side of the work machine. Machine.