JPH041425A - Soundproofing type engine working machine - Google Patents

Abstract

PURPOSE:To attach and detach an exhaust muffler without attaching and detaching other equipment by integrating a case side fan duct with a soundproofing case to improve sealing and insulating properties, and also forming an opening part on the part of an engine side duct. CONSTITUTION:An engine E and a working machine D are fixedly connected to be arranged in the inside of a soundproofing case C. The exhausting wind of an engine cooling wind is introduced with an engine side duct 3. Moreover the exhausting wind of a working machine cooling air is guided by a working machine side duct 6. Both the exhausting winds are joined in a case side fan duct 1, in which an engine exhaust muffler is arranged in the inside, to be exhausted out of the soundproofing case C. In the above constitution, the case side fan duct 1 is made a duct, having constitution integrated with the soundproofing case C, to make the attaching and detaching of the soundproofing case C and the case side fan duct 1 impossible. An opening- and closing-possible opening part 3a is provided on the fitted part upper side of the cylinder head of an exhaust muffler base on the engine side duct 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a soundproof engine, which includes an engine and a working machine such as a generator that is operated using the engine as a power source, housed in a soundproof case. Regarding work equipment.

(B) Prior Art Conventionally, a technique has been known in which an engine working machine having an engine and a generator disposed inside is covered with a soundproof case and an exhaust duct is formed inside.

For example, Utility Model Application No. 62-76235, Utility Model Application No. 60
This technique is similar to the techniques described in Japanese Patent Publication No. 159838, Japanese Patent Publication No. 642769, and Japanese Utility Model Application Laid-Open No. 62-59728.

(C) Problems to be Solved by the Invention In the above conventional technology, the engine-side duct that guides the exhaust air from the engine side and the work machine-side duct that guides the exhaust air from the generator, which is the work machine, are integrated. It was constructed so that an exhaust duct that covered the outer circumference of the exhaust muffler and guided it to the opening of the soundproof case was installed separately.

The exhaust duct that houses the exhaust muffler was not fixed to the soundproof case, but was fixed to the engine side duct and extended.

Therefore, the problem is the seal that prevents exhaust air leakage at the joint between the engine side duct and the exhaust duct, and the seal that prevents exhaust air leakage between the exhaust duct and the wall of the soundproof case. It was.

In the present invention, the exhaust duct is integrated with the soundproof case to form a case-side exhaust duct, and the case-side exhaust duct is fixed to the soundproof case, and from the opposite side of the soundproof case, Insert the engine and generator assembly;
The engine side duct is configured to be inserted into the case side exhaust duct.

The connecting portion between the engine side duct and the case side exhaust duct is configured to be tightly sealed with an elastic sealing material.

In this way, if the exhaust duct is integrated with the soundproofing case and the engine side duct is integrated with the engine,
After the case-side exhaust duct and the engine-side duct are connected, it is necessary to take out the engine each time the exhaust muffler is attached or detached.

In the present invention, an opening 3a for inspection and repair is provided in the engine side duct so that the base portion of the exhaust muffler can be attached and detached from the outside of the soundproof case in such a case.

(d) Means for Solving the Problems The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be explained.

The engine and the work equipment are fixedly arranged inside a soundproof case, the engine cooling air is guided through the engine side duct, the work equipment cooling air is guided through the work equipment side duct, In a configuration where both flow into a case-side exhaust duct with an engine exhaust muffler placed inside, and are discharged outside the soundproof case, the case-side exhaust duct is integrated with the soundproof case, and the case side exhaust duct is integrated with the soundproof case. In addition to making it impossible to attach or detach the duct, an opening that can be opened and closed is provided above the attachment part of the cylinder head at the base of the exhaust muffler in the engine side duct.

(E) Embodiment The problems to be solved by the present invention and the means for solving them are as described above.Next, the structure of the embodiment shown in the attached drawings will be explained.

Fig. 1 is a front view of the soundproof engine working machine of the present invention;
The figures are the same front sectional view, FIG. 3 is the same plan sectional view, and FIG. 4 is the same (left side sectional view), and FIG. 5 is the same right side view.

As shown in FIG. 1, the soundproof engine working machine of the present invention has an engine E and a generator mounted on a base frame 15 supported by four wheels: rear wheels 7, 7 and front wheels 8, 8. I have posted what I have done.

When mounting, as shown in Fig. 4 and Fig. 5, the vibration isolating rubber 20, 20 below the engine E and the vibration isolating rubber 21, 21 below the generator are used to prevent the engine E, which is the source of vibration. The generator is suspended and supported so that vibrations from the generator are not transmitted to the base frame 15 and, by extension, to the soundproof case C.

On the other hand, the battery 9 that supplies power to the starting motor Mo of the engine E, the fuel tank 14, and the soundproof case C are directly supported on the base frame 5.

The case-side exhaust duct 1, which is the main part of the present invention, is integrally fixed to the soundproof case C. Furthermore, the exhaust air from the case-side exhaust duct 1 is fixed to the soundproof case C. The external exhaust duct 5 that leads to the side is a soundproof case C.
It can be attached and detached using bolts 5a. On the other hand, the case side exhaust duct 1 and the soundproof case C are integrated by a fastening method such as welding that cannot be easily removed, and cannot be attached or detached.

A hanging locking rod 19 is protruded from the upper part of the soundproof case C,
Further, a front handle 17 is disposed on the side surface of the soundproof case C above the front wheels 8, 8, and a rear handle 18 is disposed on the side surface of the soundproof case C above the external exhaust duct 5.

An inspection/repair opening 26a is provided on the side surface of the engine E portion of the soundproof case C, and the inspection/repair opening 26a is closed by an opening cover 26.

By removing the frontage cover 26, the engine E part inside the soundproof case C can be inspected and repaired.
When attaching and detaching the cylinder head 12 using the fastening bolts 4b, it is not possible to simply remove the opening cover 26.

In order to attach and detach the mounting bracket 4a to the cylinder head 12, it is necessary to remove either the engine side duct 3 or the case side exhaust duct 1. In this case, the case side exhaust duct 1 is integrated with the soundproof case C. Therefore, it is necessary to remove the engine side duct 3 or take out the engine E and the engine side duct 3 to the outside, and then attach and detach the mounting bracket 4a.

The present invention provides an opening 3a in the engine side duct 3 so that the mounting bracket l-4a and the cylinder head 12 can be attached and detached, and the opening 3a is normally kept blind i1.
It is closed due to 6.

Therefore, as shown in Fig. 3, the external exhaust duct 5 attached to the external lever of the soundproof case C can be removed by removing the bolts 5a.
Next, remove the opening cover 26 and the opening 3a, and then remove the mounting bracket 4.
Loosen the fastening pole 4b that fastens the exhaust muffler 4, insert a box wrench into the opening on the side of the external exhaust duct 5, and loosen and remove the fastening pole 4b. It can be taken out from the opening of the duct 5.

Conversely, when installing the exhaust muffler 4, connect the exhaust muffler 4 and mounting bracket 4a from the opening of the external exhaust duct 5.
After inserting the part 4b into the opening 3a and temporarily fixing the fastening pole 4b, it can be tightened using a box wrench inserted through the opening of the external ventilation duct 5.

The configuration of the exhaust duct will be explained with reference to FIGS. 2 and 3.

The entire structure is sealed with a soundproof case C to improve the soundproofing effect, but the cooling exhaust air from the engine E,
The cooling exhaust air from the generator must be discharged to the outside.
If this part had a large opening to the outside, the effect of covering the soundproof case C would not be achieved. Therefore, the engine exhaust air and the generator exhaust air are merged into the case side exhaust duct L, and this allows the inside By arranging the exhaust muffler 4, the exhaust muffler 4 is configured to suppress noise.

After cooling the exhaust muffler 4, the exhaust air collectively passes through the external exhaust duct 5 and is discharged toward the lower side in a direction that reduces noise as much as possible.

Engine cooling air is blown by the engine cooling fan 11 in the fan case F, passes through the fins of the cylinder head 12 along the engine side duct 3, and is guided into the case side exhaust duct 1. It is.

In addition, the cooling air for the generator is blown by the generator cooling fan 10, passes through the inside of the generator case, cools the generator, and then comes out of the work machine side duct 6.
While passing under the generator in the spiral shape, it merges into the case side exhaust duct 1 from a direction perpendicular to the connecting portion between the engine side duct 3 and the case side exhaust duct 1.

The working machine side duct 6 is also integrated with the engine side duct 3 and is fixedly installed on the engine E side.

The integrated part of the engine side duct 3 and the work machine side duct 6 integrates the engine E and the generator.
On the other hand, the case side exhaust duct 1 is integrated into the soundproof case C side.

Therefore, the engine E and the generator are supported by the base frame 15 via the vibration isolating rubbers 20, 20 and 21, 21, and the soundproof case C is directly supported by the base frame 15. Since the vibrations of the two are different, the connection between the case-side exhaust duct 1 and the engine-side duct 3 cannot be fixed, so an elastic heat insulating material 27 is interposed as shown in FIG. They are connected in close contact.

Further, a heat insulating material 2 is wrapped around the case side exhaust duct 1 over the front surface thereof.

13 is an air cleaner.

Also, as shown in Figures 1 and 2, the front wheels 8 and 8
is pivotally supported on the rear end of the base frame 15, but the rear wheel 7
・7 is the center of gravity G of the aircraft than the front end of the base frame 15
It is pivoted at a location close to.

Ratio of the distance X from the center of gravity G to the rear wheels 7 and 7 and the distance Y from the center of gravity G to the front wheels 8 and 8, distance Y/distance X = 2
．． It is configured to have a value of 0 to 3.5.

In the conventional technology, distance X = distance Y, but in this case, when trying to change direction by holding the front handle 17 or rear handle 18, the front handle 17 or the rear handle 18 is used to lift the front or rear part. When pushing down the aircraft by holding the front handle F or the rear handle 18, if there are front wheels 8, 8 and rear wheels 7, 7 on both ends of the base frame 150, the distance from the center of gravity G to the wheel that is the fulcrum. Because it was far away, the turning operation to lift the other end of the aircraft was heavy and difficult.

In order to make turning easier and lighter, use front wheels 8.8 and rear wheels 7.7.
It would be possible to place them close together, but this would cause the aircraft to fall over.

In the present invention, instead of bringing both front wheels 8, 8 and rear wheels 7, 7 closer to the center of gravity G, only one rear wheel 7, 7 is brought closer to the center of gravity GL and the rear handle 18 is pushed down. Using the rear wheels 7, 7 as a fulcrum, the center of gravity G is lifted over a short distance to the center of gravity G, so it is relatively easy to lift the front wheels 8, 8 and turn around the rear wheels 7, 7. It is possible to do so.

When turning, it is necessary to push down the rear handle 18, lift the front wheels 8, 8, and perform a turning operation centering on the rear wheels 7, 7.

Further, in this configuration, the battery 9 is arranged in a space below the inclined cylinder head 12 side of the engine E.

The cylinder head 12 is not supported by the engine E, but is placed directly on the base frame 15.

In addition, as shown by the broken line in FIG. 4, the inclined cylinder head 1
A configuration in which the engine E is mounted on the cylinder block of the engine E on the side opposite to the side shown in FIG. 2 is also disclosed.

Conventionally, in order to start engine E, high rotation was required, so the starting motor MO also required a powerful motor.
A large battery was used, and it was not one that could be placed between engine E and soundproof case C.

In the present invention, the starting rotation speed of the engine E is set to 35 Or
By making it possible to start at a low rotation speed of pm or less, the starting force of the starting motor MO can be reduced, and the battery 9 that supplies power to the starting motor MO can also be small.
It can be placed between the soundproof case C on the side of the engine E.

(f) Effects of the Invention Since the present invention is constructed as described above, it has been able to achieve the following effects.

First, by integrating the case side exhaust duct 1 with the soundproof case C, the possibility of attachment and detachment is reduced, so the insulation material 2 can be wrapped around the whole, improving sealing performance.
This made it possible to improve the heat insulation properties.

Secondly, by opening the opening 3a in the engine side duct 3, even though the case side exhaust duct 1 has a structure that is difficult to remove, by inserting your hand through the opening 3a,
It is now possible to remove the fastening bolts 4b of the mounting bracket 4a, and by inserting a box wrench from the external exhaust duct 5, the exhaust muffler 4 can be attached and detached without having to attach or detach other devices. be.

[Brief explanation of the drawing]

Fig. 1 is a front view of the soundproof engine working machine of the present invention;
The drawings are also a front sectional view, FIG. 3 is a plan sectional view, FIG. 4 is a left side sectional view, and FIG. 5 is a right side view.・Engine・・Generator・・Soundproof case・・Fan case・・Case side exhaust duct・・Engine side duct・・Work equipment side duct・Opening・Opening lid Applicant Yanmar Diesel Co., Ltd. Agent Patent Attorney Hisashi Yano

Claims (1)

[Claims] The engine and the work equipment are arranged in a solid state inside a soundproof case, the exhaust air of the engine cooling air is guided through the engine side duct, the exhaust air of the work equipment cooling air is guided through the work equipment side duct, In a configuration where both flow into the case-side exhaust duct, which has an engine exhaust muffler inside, and are discharged outside the soundproof case, the case-side exhaust duct is integrated with the soundproof case, and the soundproof case and case side A soundproof engine working machine characterized in that the exhaust duct cannot be attached or detached, and an opening that can be opened and closed is provided above the attachment part of the exhaust muffler base to the cylinder head in the engine side duct.