JPS6218669Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling structure for a soundproofing device for an engine-driven welding machine, and more particularly to an improvement of a cooling circuit in a soundproofing device that accommodates the muffler of the engine together with the engine-driven welding machine.

A conventional method of this type is one in which the muffler, which becomes hot during engine operation, is housed in a soundproof box in addition to the engine-driven welding machine body, from the viewpoint of soundproofing effect and handling. The inside of the box is divided into several rooms such as the engine room, generator room, and radiator room to form ventilation ducts for cooling the main body of the equipment, and the opening and closing door for engine maintenance and inspection provided on the side of the box is divided into two rooms. The structure was very complicated because it had a layered structure and a cooling circuit was formed inside the box by using the voids in the layered structure. In other words, a series of continuous ducts from the intake port to the exhaust port via the cooling chamber containing the engine or other cooled device is formed separately from the box.
If the structure becomes complicated and the welding capacity differs, the cross-sectional diameter of the duct must be changed to change the suction amount, and a box body with a dedicated duct that matches the welding capacity must be manufactured, which is extremely expensive. Not only is it inconvenient, but when manufacturing soundproofing equipment,
Since the duct as described above must be formed, the welding must be performed sequentially according to a predetermined procedure, making the assembly work complicated.
Moreover, the work efficiency was extremely poor. Moreover, since the box has a structure in which a large number of air intake and exhaust ports are formed on the circumferential surface of the box, mechanical noise inside the box easily leaks to the outside, and the soundproofing effect is not good.

The present invention was developed in view of the above-mentioned drawbacks.The present invention aims to simplify the structure of the box by creating a duct with a sound path that curves only near the wind intake and exhaust ports. By making efficient use of the space available to store equipment such as engines and generators, engine-driven welding machines with different welding capacities can be mounted without significantly changing the design of the box, making it extremely convenient. Moreover, it is an object of the present invention to provide a soundproof device cooling structure for an engine-driven welding machine, which has a one-way intake/two-way exhaust configuration and can improve cooling efficiency even when the welding capacity differs.

In order to achieve the above object, the present invention provides a soundproofing device with a sealed structure in which a sound absorbing material is pasted to the inner surface of a steel plate to form a box. At the same time, a battery for starting the engine is arranged in a space on one side of the main body of the engine-driven welding machine, and a muffler is stored in the space inside the box above the battery for starting the engine. A small casing-like muffler soundproof duct is formed in communication with the box body, and an inlet is formed in the base of the box body to communicate with the box body and take in cold air from the bottom side of the base, and the inlet has a curved sound path. At the other end of the box body, an engine cooling radiator is installed at an appropriate distance from the rear wall of the box body, and the engine cooling radiator and the box body are connected to each other. A soundproofing device for an engine-driven welding machine with a one-way intake/two-way exhaust configuration, in which a soundproof exhaust duct is formed between the rear wall and the soundproof exhaust duct, which communicates with the outside and the muffler soundproof duct in a curved sound path shape. It features a cooling structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a soundproof device cooling structure for an engine-driven welding machine according to the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a box body that houses an engine-driven welding machine main body A that is started by a battery.
The box body 1 has opening/closing doors 2, 2 for maintenance and inspection of the generator and engine on both sides, and when the opening/closing doors 2, 2 are closed, a sound-absorbing material 4 is pasted on the inner surface of the iron plate 3 to seal the box. formed into a structure. Reference numeral 5 denotes a base of the box body 1. An engine 7 and a generator 8 are mounted on the inner surface of the base 5 via a vibration-proof rubber 6, and a radiator 9 for cooling the engine is arranged on the rear side of the inner surface of the base 5. It has a structure that allows In the engine-driven welding machine main body A, an engine 7 and a generator 8 rotationally driven by the engine 7 are directly connected.

In the present invention, as shown in FIGS. 2 and 3, an engine-driven generator main body A is installed on the inner surface of the base 5 so as to be shifted to one side from the front and rear center line of the box body 1, and a third Engine 7 as shown in the figure
A battery 10 for starting the welding machine is installed in a space formed by the arrangement of the engine-driven welding machine main body A. The engine 7 has a fan 11 that blows cooling air to the radiator 9 when driven by the engine 7, and the generator 8 also has a fan 12 that cools the inside of the generator 8 when driven by the fan 11. The base 5 has a concave portion 15 located on the front and rear center line and having a predetermined width extending from the front wall 35 side of the box body 1 to the rear wall 14 side.
is formed. A through hole 13 is bored at a position closer to the front wall 35 than the center of the concave portion 15 to communicate the inside and outside of the box body 1. A baffle plate 16 bent into a U-shape is attached to the bottom surface of the base 5 so as to cover the through hole 13. Therefore, air intake ports 17, 17 communicating with the through hole 13 are formed at both ends of the baffle plate 16. A sound absorbing material 14 is adhered to the inner surface of the baffle plate 16. A partition plate 18 that is inclined obliquely upward from the rear edge of the through hole 13 is fitted into the recessed part 15 , and a rear wall 35 of the box body 1 is inserted from the upper end of the partition plate 18 .
It is covered so as to cover the concave portion 15 extending to the side. As a result, a suction duct 19 having a curved sound path is formed at a portion extending from each of the suction ports 17, 17 through the through hole 13 to the inside of the concave portion 15. The partition plate 18 is provided so that the engine 7, especially the oil pan section, can be effectively cooled by cooling air. A partition wall 20 to which a sound absorbing material 4 is attached is provided within the box body 1 at an appropriate distance from the rear wall 14, and a soundproof exhaust duct 21 is provided between the partition wall 20 and the rear wall 14. A radiator 9 is attached to the partition wall 20, and the radiator 9 is ventilated by the fan 11. The rear wall 14 is designed so that the wind from the radiator 9 flows through the soundproof exhaust duct 21 and is discharged to the outside.
Numerous exhaust holes 2 at positions offset from the radiator 9
2 is drilled. If the wind passing through the radiator 9 curves inside the soundproof exhaust duct 21 and is discharged to the outside from the exhaust hole 21, it becomes a curved sound path for the noise generated from the engine 7 and the generator 8. It is possible to reduce the On the back surface of the top wall 23 of the box body 1 above the battery 10,
A muffler storage case 27 in which a muffler 24 is stored is attached. The inside of the muffler storage case 27 is communicated with the inside of the soundproof exhaust duct 21 through a through hole 25 provided on one side of the upper part of the partition wall 20, and the muffler storage case 27 is designed to prevent noise generated from the engine-driven welding machine main body A from turning. It is provided as a muffler soundproof duct 26. The muffler soundproof duct 2 is located on the top wall 23 of the box body 1 which forms the muffler soundproof duct 26 together with the muffler storage case 27.
A large number of exhaust holes 28 are provided to discharge the wind inside the muffler 6 and the exhaust gas discharged from the muffler 24. Furthermore, when a large-capacity engine-driven welding machine body is mounted in the box body 1' as shown in FIG. If a part of the box 23' is projected outward, the dimensions of the engine will only increase slightly, and the dimensions of other equipment such as the radiator will not change, so there is no need to change the width or length of the box 1'. In addition, in FIGS. 1 to 3, reference numeral 29 denotes hinges for attaching the opening/closing doors 2, 2 for inspecting the engine 7 and the power generating section 8 to both sides of the box body 1;
30 is a switchboard, 31 is a muffler exhaust port, 32 is a radiator stand, 33 is a fuel tank, and 34 is a wheel.

The above soundproofing device cooling structure of the present invention has a fan 1
1 and 12 from the intake ports 17 and 17 is introduced into the box body 1 through the intake duct 19, and is inside and outside of the engine-driven welding machine main body A, and furthermore, the fuel tank 33. After being evenly cooled, it enters the soundproof exhaust duct 21 through the radiator 9, flows through the soundproof exhaust duct 21, and is discharged to the outside from the exhaust hole 22, and some of the cooling air inside the soundproof exhaust duct 21 is It enters the muffler soundproof duct 26 through the through hole 25, cools the muffler 24, and is discharged to the outside through the exhaust hole 28. Exhaust gas discharged from the muffler 24 is also discharged to the outside from the exhaust hole 28.

As described above, according to the soundproof device cooling structure for an engine-driven welding machine according to the present invention, the inlet is provided at the base of the box body, and the curved sound path is only provided near the inlet and on the radiator exhaust side. The rest is sealed with a box made of iron plates covered with sound-absorbing material, and like the conventional method, the box is divided into several rooms where the engine and generator are housed, and there is also a box for opening/closing doors, etc. If the body has a double structure and the gap in the double structure is used as a duct dedicated to the cooling circuit, it is not only easier to assemble and manufacture, but also the suction port is located almost below the generator. Therefore, not only is the cooling air introduced towards the generator itself to cool it, but the cooling air introduced from the intake port is also introduced below the engine along the slope of the partition plate. The engine, especially the oil pan at the bottom of the engine, can be effectively cooled. In addition, the engine, which produces the most noise, is installed offset from the intake port, so the sound is absorbed and reflected by the sound-absorbing material inside the box, and the intake port has a baffle plate, so the inside Noise pollution is prevented from leaking directly to the outside from the intake port. Furthermore, inside the conventional box of a certain size,
When installing an engine-driven welding machine with a different welding capacity, especially a large welding capacity, the cross-sectional diameter of the dedicated duct must be increased because cold air must be introduced to match the welding capacity. There are no problems that require design changes, and engine-driven welding machines with different welding capacities can be easily installed. In other words, in this invention, the areas with high air resistance are only near the inlet and on the exhaust side, and the passage lengths near the inlet and on the exhaust side are shorter than the length of the passage inside the box. Even if the main body of an engine-driven welding machine with a large welding capacity is housed in a box, a sufficient amount of cooling air can be obtained, and the cooling efficiency is extremely good. Moreover, the structure inside the box is extremely simple, and the engine-driven welding machine main body, battery, etc. are installed by effectively utilizing the inside of the box, so it can be made compact. Furthermore, since the muffler is housed inside the muffler soundproof duct, the muffler can also be cooled, and the muffler soundproof duct is installed in the dead space above the engine starting battery.
Even with the formation of the muffler soundproof duct, the box body does not become large, and the one-way intake/two-way exhaust type provides better soundproofing compared to the conventional method of providing multiple intakes and exhaust ports on the box body. It has great effects, such as good effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the soundproofing device cooling structure for an engine-driven welding machine according to the present invention, and FIG. 1 is a longitudinal sectional view thereof, and FIG. 2 is a partially cutaway view of the soundproofing device cooling structure in FIG. A plan view, FIG. 3 is a partially cutaway rear view of the soundproofing device cooling structure in FIG. 1, and FIG. 4 is a partially cutaway rear view of main parts showing another embodiment. A...Engine-driven welding machine body, 1...Box body, 3...Iron plate, 4...Sound absorbing material, 5...Base,
9...Radiator for engine cooling, 10...Battery for engine starting, 17,17...Intake port, 2
1... Soundproof exhaust duct, 24... Muffler, 26...
...Muffler soundproof duct.

Claims (1)

[Scope of utility model registration request] In a soundproofing device cooling structure for an engine-driven welding machine having a sealed structure in which a sound absorbing material is pasted to the inner surface of a steel plate to form a box, a plate-shaped base is provided at the bottom of the box, and a plate-shaped base is provided at the center of the base. has a recess extending from the front wall to the rear wall of the box body, and on the base inside the box body is an engine and a generator directly connected to the engine in a straight line, which is slightly shifted from the center to one side wall of the box body. The generator is installed on the front wall of the box, the engine is installed on the rear wall of the box, and the battery for starting the engine is stored in the empty space on the other side wall of the box. An inlet for introducing outside air into the box is formed in the concave part of the base near the front wall of the box and approximately below the generator, and a sound path is formed by bending into the inlet. Attach a baffle board to prevent
The concave part of the base is covered with a partition plate with an inclined surface that rises from the edge of the intake port to the bottom of the engine, and the radiator is placed on the opposite side from where the generator of the engine is directly connected. A fan is installed to blow air towards the box, and a radiator is placed on the base close to the fan. A soundproof exhaust duct is formed between the air exhaust side of the radiator and the rear wall of the box. An exhaust hole is formed on the rear wall at a position that is not in line with the direction of exhaust air from the radiator by the fan and communicates with the inside of the soundproof exhaust duct, and a muffler is installed in the empty space inside the box above the engine starting battery. A muffler soundproof duct in which the muffler is housed is formed in a longitudinal shape along the side wall of the box, and the muffler soundproof duct and the soundproof exhaust duct are orthogonally communicated with each other at a position on the upper inner surface where the rear wall and the side wall of the box join. , an exhaust hole communicating with the inside of the muffler soundproof duct is formed in the top wall of the box above the muffler soundproof duct, and the exhaust hole has a one-way intake, two-way exhaust configuration. A soundproof device cooling structure for an engine-driven welding machine.