JP2541576Y2 - Engine generator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator in which an air-cooled generator driven by an engine is covered by a sound insulating wall.

[0002]

2. Description of the Related Art An air-cooled engine generator 101 shown in FIG.
Is an air-cooled engine 102 and this engine body 103
, An air-cooled generator 106 connected to a crankshaft protruding from the other end of the engine main body 103, and an engine cooling fan 104 disposed between the engine main body 103 and the generator 106. A generator cooling fan 105, a frame 115 covering the engine 102 and the generator 106, and a sound insulating wall 107 attached to the frame and covering the generator 106.

The engine cooling fan 104 has a cover 1
08, a cooling air inlet 109 is provided below the cover 108, and an opening 108 a facing the cylinder portion 103 a of the engine body 103 is provided above the cover 108. As a result, when the engine cooling fan 104 rotates, the engine cooling air flows from one end of the engine main body 103 to the other end through the cylinder portion 103a as indicated by an arrow A in the drawing. Radiation fins are provided on the cylinder portion 103a.

[0004] A cooling air inlet 110 is provided at an end face of a casing 106a of the generator 106, and a cooling air inlet 111 is also provided at an end 107d of a sound insulating wall 107 facing the end face of the casing 106a of the generator 106. Is provided. The space between the two cooling air inlets 110 and 111 is covered by a cooling air guide duct 112. As a result, when the generator cooling fan 105 rotates, the generator cooling air flows from the generator 106 toward the other end of the engine body 103 as shown by the arrow B in the figure. The generator cooling air reaching the other end of the engine body is
6, an opening 106 provided on the outer periphery of the casing 106a.
b is discharged to the outside of the generator 106.

In the engine generator 101 as described above, the space surrounded by the sound insulating wall 107 around the generator 106 becomes high in temperature due to the heat released from the engine 102 and the generator 106. In order to prevent such space air from being introduced into the casing of the generator 103 as cooling air, an annular seal member 112 is integrated with the inner surface of the end sound insulation wall 107d, and this annular seal member is provided. One end of the guide duct 112 was inserted into the inner circumference of the guide 116. The end sound insulating wall 107d was attached to the frame 115 by bolts and nuts 118, and the other end of the guide duct 112 was attached to the end face of the generator 106 by bolts 117.

[0006]

In the conventional structure, the end sound insulating wall 107d is connected to the frame 115 by the bolts and nuts 11.
Before mounting with the guide 8, it was necessary to mount the guide duct 112 on the generator 106 with bolts 117 in advance, which was cumbersome to assemble and the number of parts was large. Further, since the annular seal member 116 is fixed to the end sound insulating wall 107, the annular seal member 116 may be damaged by a large vibration when the engine 102 starts and stops, or the guide duct 112 may be damaged.
And the sealing function is impaired.
However, there is a problem that the cooling effect is reduced.

An object of the present invention is to provide an engine generator capable of solving the above-mentioned problems of the prior art.

[0008]

SUMMARY OF THE INVENTION The present invention is characterized by an engine, an air-cooled generator connected to a crankshaft of the engine, a frame covering the generator, and a frame for the generator. An end sound insulating wall attached to face the end surface, and a cylindrical cooling air guide duct that covers between a cooling air inlet provided on the end sound insulating wall and a cooling air inlet provided on an end surface of the generator. In the engine generator having the above, the guide duct is integrated with the end sound insulation wall, the end of the generator is inserted into the guide duct, and between the inner circumference of the guide duct and the outer circumference of the generator. The point is that an elastic seal member is interposed.

[0009]

According to the structure of the present invention, the work of inserting the generator into the inner periphery of the guide duct via the seal member can be performed simultaneously with the work of attaching the sound insulation wall to the frame.

Further, since the seal member has elasticity and is interposed between the outer periphery of the generator and the inner periphery of the guide duct, the engine vibration can be absorbed by the seal member. Is not damaged, and the guide duct does not come off the seal member.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

Air-cooled engine generator 1 shown in FIGS.
Is an air-cooled engine 2, an engine cooling fan 3 arranged at one end of the engine body 2a, an air-cooled generator 5 connected to a crankshaft protruding from the other end of the engine body 2a, A generator cooling fan 4 is provided between the engine body 2a and the generator 5.

The engine 2 and the generator 5 are connected to a frame 1
The sound insulation wall 14 is attached to the frame 10 and is surrounded by the sound insulation wall 14. The sound insulating wall 14 is composed of an upper sound insulating wall 14a covering the upper part of the generator 5, a lower sound insulating wall 14b covering the lower part, a side sound insulating wall 14c covering both sides, and an end sound insulating wall 14d facing the end face. The end sound insulating wall 14d is formed by the bolts and nuts 18 in the frame 1.
It is attached to 0. In addition, the upper part of the engine 2
The engine 2 protrudes above the upper sound insulation wall 14a.
1, no sound insulation wall is attached to the right side.

The engine cooling fan 4 is connected to the crankshaft of the engine 2 and is covered by a cover 11. A cooling air inlet 11a is provided at a lower portion of the cover 11, and an opening 11b facing the cylinder portion 2a 'of the engine body 2a is provided at an upper portion of the cover 11. As a result, when the engine cooling fan 3 rotates, the engine cooling air flows from one end of the engine main body 2a to the other end through the cylinder portion 2a 'as shown by an arrow A in the drawing. A radiation fin is provided on the cylinder portion 2a '.

The generator 5 has a cylindrical casing 5a.
And the engine 2
And a stator 5c fixed to a casing of the rotor 5b. A cooling air inlet 7 is provided at an end face of the casing 5a.
Further, a cooling air inlet 15 is provided in the end sound insulation wall 14b facing the end surface of the casing 5a. The space between the two cooling air inlets 7 and 15 is covered by a cooling air guide duct 16.

The generator cooling fan 4 is connected to the crankshaft of the engine 2 and has a casing 5 a of the generator 5.
Covered in. A plurality of openings 6 located outside the generator cooling fan 4 are provided on the outer periphery of the casing 5 a of the generator 5.

The tubular cooling air guide duct 16 is integrated with the end sound insulating wall 14d by welding. The end of the generator 5 is inserted into the guide duct 16, and an annular seal member 17 having elasticity is interposed between the inner periphery of the guide duct 16 and the outer periphery of the generator 5.

As a result, when the generator cooling fan 4 rotates, the generator cooling air is generated as shown by the arrow B in the figure.
Flows toward the other end of the engine body 2a. The generator cooling air reaching the other end of the engine body 2a is:
The electric power is discharged to the outside of the generator 5 from an opening 6 provided on the outer periphery of a casing 5 a of the generator 5.

A cooling air discharge guide 25 is arranged at the other end of the engine body 2a. The cooling air discharge guide 25 is fixed to the engine main body 2a by an appropriate means, and moves the engine cooling air and the generator cooling air reaching the other end of the engine main body 2a in the same direction (arrow C in FIG. 2).
Direction).

As shown in FIG. 4, the cooling air discharge guide 25 faces the engine main body 2a and the generator 5
Wall 25b in which an opening 25a into which is inserted is formed
From the outer peripheral edge of the first wall 25b.
and a second wall 25c extending toward “a”. The upper part 25c 'of the second wall 25c is
c ", and on the upper part 25c 'of the second wall 25c,
An opening 26a for discharging engine cooling air and an opening 26b for discharging generator cooling air are provided. The engine cooling air discharge opening 26a is located above the generator cooling air discharge opening 26b. The engine cooling air flows through the cylinder portion 2a 'of the engine body 2a and reaches the other end of the engine body 2a, and the generator cooling air flows through the inside of the casing 5a of the generator 5 below the cylinder portion 2a'. This is because it reaches the other end of 2a.
The two discharge openings 26a, 26b pass through the duct 27 as shown by phantom lines in FIG.
The cooling air is discharged from the cooling air discharge port 28 provided at the position c.

A plate-like partition member 30 is provided inside the cooling air discharge guide 25 between the upper and lower sides of the discharge openings 26a and 26b. The partition member 30
The flow of the engine cooling air reaching the other end of the engine body 2a and the flow of the generator cooling air are prevented from interfering with each other. Sound absorbing materials 31a and 31b such as urethane are attached to the upper and lower surfaces of the partition member 30.

According to the above configuration, the end sound insulating wall 14d is attached to the frame 10 by the bolt and nut 18, and the generator 5 is attached to the cooling air guide duct 16 by the sealing member 1.
7 can be simultaneously performed, and the efficiency of the assembling operation can be improved. Further, since the end sound insulating wall 14d and the cooling air guide duct 16 are integrated, the number of parts is reduced. Further, since the seal member 17 has elasticity, a large vibration when the engine 2 starts and stops can be absorbed, and the seal member 17 is not damaged.

The engine cooling air and the generator cooling air reaching the other end of the engine body 2a are guided in the same direction by a cooling air discharge guide 25. At this time, since the partition member 30 is provided in the cooling air discharge guide 25, the flow of the engine cooling air and the flow of the generator cooling air do not interfere with each other, and the efficiency of discharging each cooling air is improved, and And the cooling effect of the generator is improved. The vibrations of the engine cooling air and the generator cooling air are absorbed by the sound absorbing members 31a and 31b provided on the partition member 30, and the noise can be reduced.

[0024]

According to the engine generator of the present invention, the installation process of the cooling air guide duct and the sound insulation wall can be simplified, the number of parts can be reduced, and the confidentiality in the guide duct can be reliably maintained. Thus, the cooling effect of the generator can be prevented from being reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air-cooled engine generator according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a perspective view of the air-cooled engine generator according to the embodiment of the present invention;

FIG. 4 is a perspective view of a cooling air discharge guide according to the embodiment of the present invention;

FIG. 5 is a sectional view of a conventional air-cooled engine generator.

[Explanation of symbols]

 2 Engine 5 Generator 7 Cooling air inlet 10 Frame 14d End sound insulation wall 15 Cooling air inlet 16 Cooling air guide duct 17 Seal member

Claims (1)

(57) [Scope of request for utility model registration] 1. An engine, an air-cooled generator connected to a crankshaft of the engine, a frame covering the generator, an end sound insulating wall attached to the frame so as to face an end face of the generator, In an engine generator including a cooling air inlet provided in the end sound insulating wall and a cylindrical cooling air guide duct that covers a space between the cooling air inlet provided in the end face of the generator, The guide duct is integrated, an end of the generator is inserted into the guide duct, and an elastic sealing member is interposed between an inner periphery of the guide duct and an outer periphery of the generator. And engine generator.