JP3365916B2 - Soundproof engine driven work equipment set - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof type engine-driven working machine set in which a single engine and a plurality of working machines driven by the engine are mounted in a soundproof case, and particularly to a first working machine. The present invention also relates to a soundproof engine-driven working machine set including a working machine with a power generation function including a rectifier, such as a generator or a welding machine.

[0002]

2. Description of the Related Art Conventionally, in this type of working machine set, an exhaust duct is installed for each engine and each working machine in order to discharge the cooling air after being used for cooling the engine and each working machine. As the cooling air intake structure, the cooling air intake ports of the engine and each working machine are provided on the side surface or the upper surface of the soundproof case.

Regarding cooling of a working machine with a power generation function having a rectifier, as described in Japanese Utility Model Publication No. 57-153589, a special generator cover is attached to the generator and the generator cover is attached. The shape and structure of (3) are devised so that the cooling air introduced from the outside concentrates on the rectifier part.

[0004]

[Problems to be Solved by the Invention]

(1) For exhausting cooling air of the engine and the working machine, if the exhaust ducts reaching the outside are individually installed, the soundproof case itself becomes large.

(2) If the working machine with a power generation function is provided with a special cover, the cost increases and the number of parts increases.

(3) When the cooling air is taken in from the side surface or the top surface of the soundproof case, noise inside the soundproof case easily leaks to the outside. In addition, if the work equipment is installed in a narrow place that obstructs the intake of each exhaust air or each cooling air, or in a position close to the wall of the building, the cooling function inside the soundproof case will not operate sufficiently. .

[0007]

In order to solve the above problems, the invention according to claim 1 of the present application is a soundproof type in which a single engine and a plurality of working machines driven by the engine are mounted in a soundproof case. In the engine driven work equipment set,
As the first working machine, a working machine with a power generation function having a rectifier is arranged in series with an engine and directly connected to an engine output shaft, and a second working machine is arranged in parallel with the engine and an engine is provided via a transmission mechanism. An exhaust air passage is provided which is connected to the output shaft and allows the exhaust air of the engine and the exhaust air of the work machine with the first power generation function to flow together. The downstream end of the exhaust air passage is communicated with the outside of the soundproof case. However, the cooling air intake for the working machine with the power generation function is formed at the bottom of the soundproof case near the rectifier of the working machine with the power generation function.

According to a second aspect of the present invention, in the soundproof type engine-driven working machine set according to the first aspect, an air compressor and an air tank are arranged as a second working machine, and an engine cooling air intake is provided at the bottom of the soundproof case. The cooling air intake for the air compressor is formed at the bottom of the soundproof case immediately below the air tank.

According to a third aspect of the present invention, in the soundproof type engine-driven working machine set according to the first or second aspect, the starter rope of the recoil starter of the engine is extended to the operation panel surface of the side wall of the soundproof case, and the knob thereof is provided. It is characterized by being attached to the operation panel so that it can be pulled out freely.

[0010]

1 is a schematic plan view showing a layout of a soundproof type engine-driven working machine set to which the present invention is applied, and an exhaust path and the like are partially shown in section. In FIG. 1, an air-cooled engine 3 is arranged in a box-shaped soundproof case 1. Assuming that the longitudinal direction of a crankshaft 18 of the air-cooled engine 3 is the front-back direction, the rear side of the engine 3 is As a first working machine with a power generation function, a welding machine 5 having a power generation function is arranged in series with the engine 3, and on the right side, an air compressor 6 is arranged in parallel with the engine 3 as a second working machine. An air tank 7 for the air compressor is arranged behind the air compressor 6.

On the front surface of the engine 3, a cooling fan 10 for cooling the engine, a drive side pulley 12 of a transmission mechanism for an air compressor, and a recoil starter 13 are sequentially provided, and a start rope 14 of the recoil starter 13 is directed to the right side. And extends across the inside of the soundproof case 1 to the right side surface of the soundproof case, that is, the operation panel surface 9, and the knob 15 is locked to the operation panel surface 9. Drive side pulley 12 is V
It is linked to a driven pulley 17 of the air compressor 6 via a belt 16. The cooling fan 10 is housed in the fan cover 20, and a large number of air holes 43 communicating with the inside of the fan cover 20 are formed on the outer circumference of the case of the recoil starter 13.

Although not shown, the front end of the cylinder and the cylinder head of the engine 3 communicate with the inside of the fan cover 20, and a cooling air passage is formed through the engine 3 to the rear end of the engine. The outlet of the rear end of the cooling air passage is an exhaust duct 2 provided at the rear of the engine.
It communicates with 1.

An air cleaner 23 is provided at the left front portion of the engine 3.
Is provided, and an exhaust muffler 24 is provided at the left rear,
The exhaust muffler 24 is arranged in the exhaust muffler chamber 22 formed at the lower left of the welding machine 5. Exhaust muffler chamber 2
A rear end portion of the exhaust muffler 24 communicates with an inside of an exhaust pipe chamber 26 formed on a rear surface of the rear case portion 1a of the soundproof case 1, and the exhaust extension pipe 25 of the exhaust muffler 24 surrounds the exhaust muffler 24 several times. After being wound, it passes through the exhaust pipe chamber 26 to the right and reaches the outside.

The rotating shaft 28 of the welding machine 5 is arranged on the same axis O as the crankshaft 18 of the engine 3 and is directly connected to the crankshaft 18. A cooling fan 30 and a fan cover 31 that covers the cooling fan 30 are provided on the front surface of the welding machine 5. The fan cover 31 has a large number of air exhaust holes 32 on its outer peripheral surface and is surrounded by an air exhaust guide 33. The left end outlet 33a of the exhaust guide 33 communicates with the exhaust duct 21 of the engine 3. That is, the exhaust duct 21, the exhaust muffler chamber 22 and the exhaust pipe chamber 26 that follow the exhaust duct 21 constitute an exhaust passage for combining and exhausting the exhaust air of the engine 3 and the exhaust air of the working machine with a power generation function. .

A rectifier 35 is provided at the rear end of the welding machine 5, and the rectifier 35 projects rearward from the rear case 1a and is surrounded by a rectifier cover 38. The rectifier cover 38 is arranged in the exhaust pipe chamber 26 and fixed to the rear case portion 1a.

A cooling fan 41 facing the air tank 7 is arranged at the rear of the air compressor 6, and an exhaust duct 4 for the air compressor is provided in the discharge direction (front) of the fan 41.
Two are provided. The air discharged from the cooling fan 41 and cooled around the air compressor 6 is discharged to the outside from the exhaust duct 42 through the front opening of the soundproof case 1.

An air intake 45 for cooling the air compressor is formed on the bottom plate of the soundproof case 1 immediately below the air tank 7, and the air for cooling the air compressor is supplied from the air intake 45 around the lower end of the air tank 7. It is adapted to be sucked by the cooling fan 41 through the gap.

An air cleaner 47 for an air compressor is arranged on the air compressor 6, and an intake pipe 48 of the air cleaner 47 extends downward and forward, and an intake guide pipe 44 provided at a front end portion of the soundproof case 1. Wants on. The intake guide pipe 44 extends downward and opens downward from the bottom plate of the soundproof case 1.

FIG. 5 is a plan view of the bottom plate 1b of the soundproof case 1. A plurality of rectangular cooling air inlets 50 and 51 are provided below the engine 3 and directly below the welding machine 5, respectively.
In addition to this, a plurality of rectangular air intakes 52 are formed at a position in front of the engine 3 corresponding to the recoil starter and the air cleaner 23.
An air inlet 53 for cooling the welder is also formed immediately below the rear part of the welder 5.

A guide box 55, which covers the respective air intakes 50, 51, 52 at intervals from above,
56 and 57 are arranged and fixed to the bottom plate 1b of the soundproof case 1.

FIG. 2 is a view corresponding to the II-II section of FIG.
The engine 3 and the welder 5 are not shown in cross section.
The engine cooling guide box 55 has a front end opened, the welder cooling guide box 56 has a rear end opened, and the front guide box 57 has an outlet hole 57a formed on the upper surface and the front end is opened. With these, the labyrinth is configured from the respective air intake ports 50, 51, 52 to the soundproof case 1.

A plurality of main air intakes 54 for cooling the rectifiers are formed on the lower plate of the rectifier cover 38, and the cross section is L-shaped so as to cover the air intakes 54 from below at intervals. The shielding plate 49 of is fixed. Also,
An air hole 58 is formed in the rear case portion 1 a at a position corresponding to the lower end of the rectifier cover 38.
Is the air inlet 51 for the welder and the air inlet 53
The air sucked from is guided into the rectifier cover 38.

In FIG. 4 showing the right operation panel surface 9 of the soundproof case 1, the shield plate 49 is open at both left and right ends, and air for cooling the welding machine is opened from the openings at the left and right ends and the gap between the front ends. Can be incorporated.

On the operation panel surface 9, most operation parts and display parts for welding machines, air compressors, and engines are centrally arranged. An air hose joint 61, a pressure gauge 62, an hour meter 63 and a clutch lever 64 are provided for the air compressor, a choke 65, a recoil knob 15 and an engine switch 67 are provided for the engine, and an AC outlet 68 and a welding cable connection for the welding machine. A terminal 69 is provided. The air panel 71 including the air hose joint 61 and the like is detachably attached to the soundproof case 1 and is provided at a position corresponding to the air tank 7 in FIG. 1. Therefore, by removing the air panel 71, the vicinity of the air tank is obtained. The unloader pilot valve for adjusting the air discharge pressure and the safety valve provided in the can be easily adjusted.

FIG. 3 is a vertical sectional front view, in which the starter rope 14 of the recoil starter 13 extends slightly downward to the right and reaches the operation panel surface 9. In addition, soundproof case 1
Wheels 73 for movement are provided at the bottom of the.

The flow of engine-related cooling air will be described. In FIG. 1, when the engine 3 is operated, the cooling fan 10 rotates, so that the cooling air is sucked into the fan cover 20 through the air holes 43 of the recoil starter 13 and the combustion air is sucked from the air cleaner 23. However, the air required for these is the air intake 50 directly below the engine and the air intake 52 at the front in FIG.
Taken from. The air sucked from the air intake 50 just below the engine is guided forward by the guide box 55, and part of the air is sucked from the air hole 43 to the recoil starter 13.
It is sucked in and a part of it flows along the oil pan portion of the engine 3 to cool it. The air sucked from the front air intake 52 is guided by the guide box 57, part of which is sucked into the recoil starter 13 through the air hole 43, and part of which is sucked into the air cleaner 23 of the engine 3.

In FIG. 1, the air supplied from the fan cover 20 to the cooling air passage in the engine cools the cylinder and the cylinder head, and then is collected in the exhaust duct 21 and supplied to the exhaust muffler chamber 22. . Then, after cooling the exhaust muffler 24 in the exhaust muffler chamber 22, the exhaust muffler 24 is discharged to the outside through the exhaust pipe chamber 26 and the opening 37.

The flow of cooling air for the welding machine will be described. In FIG. 2, when the cooling fan 30 of the welding machine 5 rotates, cooling air is sucked into the rectifier cover 38 through the air holes 54 from the openings at the left and right ends of the shield plate 49 and the gaps at the front and lower ends due to its suction force. While being sucked, cooling air is also sucked into the rectifier cover 38 from the air inlet 51 immediately below the welding machine and the air inlet 53 at the rear thereof via the air holes 58. The cooling air that has entered the rectifier cover 38 first cools the rectifier 35, then cools the welder 5 by passing through the cooling air passage of the welder 5, and is sucked into the fan cover 31. Air is exhausted from the inside of the fan cover 31 in the radial direction, is sent into the air exhaust guide 33 through the air holes 32, and as shown in FIG.
It is sent from a to the exhaust duct 21 of the engine 3 and merges with the engine exhaust. After that, it is exhausted to the outside through the exhaust muffler chamber 22, the exhaust pipe chamber 26, and the opening 37 together with the engine exhaust air.

The flow of the cooling air of the air compressor 6 will be described. In FIG. 1, as the cooling fan 41 of the air compressor 6 rotates, the outside air is sucked from the air intake 45 immediately below the air tank, and is sucked into the cooling fan 41 through the gap on the lower surface of the air tank 7 and the outer periphery of the lower end. After cooling the air compressor 6, the air is discharged from the opening through the front air exhaust guide 42.

[0030]

[Other Embodiments]

(1) The present invention can be applied to a working machine set having a simple generator as the first working machine with a power generation function.

(2) As the second working machine, the present invention can be applied to a working machine set equipped with a hydraulic pump or a hydraulic pump in addition to the air compressor.

(3) As the transmission mechanism for interlockingly connecting the engine and the second working machine, various transmission mechanisms such as a chain transmission mechanism and a gear transmission mechanism can be applied in addition to the belt transmission mechanism.

[0033]

As described above, according to the present invention, (1) the exhaust path of the cooling air of the engine 3 and the exhaust path of the first working machine directly connected to the engine are joined to each other, and Since the air is exhausted to the air, it is possible to simplify the air exhaust path to make the working machine set compact, and it is also possible to save the number of parts for the air exhaust.

(2) As the first working machine, such as a welding machine, which is equipped with a working machine with a power generation function having a rectifier, the cooling air intake for the first working machine is provided with sound insulation near the rectifier. Formed on the bottom of the case, the air from the outside is used efficiently for cooling the rectifier first, and then the first working machine itself is cooled. Therefore, the cooling efficiency is improved by improving the utilization efficiency of the cooling air. At the same time, unlike the conventional case, a special generator cover or the like is not required, so that the cost can be reduced and the number of parts can be reduced.

(3) In the invention according to claim 2, in addition to forming the cooling air intake 51 of the first working machine at the bottom of the soundproof case 1, the engine cooling air intake 50 is provided in the soundproof case 1. The cooling air intake 45 for the air compressor is formed on the bottom, and the soundproof case 1 directly below the air tank 7 is also formed.
Since it is formed on the bottom part of the soundproof case 1, it is possible to suppress the noise in the soundproof case from leaking outside from the air intake, as compared with the conventional example in which the air intake is formed on the side surface or the upper surface of the soundproof case 1. Further, even when the working machine set is arranged in a narrow place or a place in contact with the wall of the building, the cooling air can be taken in efficiently by appropriately performing the exhaust air treatment.

(4) In the invention according to claim 3, the starter rope 14 of the recoil starter 13 of the engine 3 is extended to the operation panel surface 9 of the side wall of the soundproof case 1, and the knob 15 thereof can be pulled out to the operation panel surface 9. Since it is attached to, the operability by the operator is improved. In particular, it is convenient as a working machine set to be mounted on a vehicle.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing a layout of a soundproof engine drive working machine set to which the present invention is applied.

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

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a right side view of the same working machine set as in FIG.

FIG. 5 is a partial plan view of a bottom plate of the soundproof case.

[Explanation of symbols]

1 Soundproof Case 1b Bottom Plate of Soundproof Case (Bottom of Soundproof Case) 3 Engine 5 Welder (Working Machine with First Power Generation Function) 6 Air Compressor (Second Working Machine) 7 Air Tank 9 Operation Panel Surface 10 Cooling Fan for Engine 12 , 16, 17 Drive side pulley, V belt, Driven side pulley (transmission mechanism) 13 Recoil starter 14 Starter rope 15 Knob 18 Crank shaft 21, 22, 26 Exhaust duct, exhaust muffler chamber, exhaust pipe chamber (exhaust passage) ) 30 Welder cooling fan 35 Rectifier 45 Air compressor cooling air inlet 50, 52 Engine cooling air inlet 51, 53 Welder cooling air inlet

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F02B 77/13 F01P 11/10 F02B 63/04 F02B 63/06 F02B 67/00 F02N 3/02 F02B 63 / 00

Claims (3)

(57) [Claims] 1. A soundproof engine-driven working machine set comprising a single engine and a plurality of working machines driven by the engine in a soundproof case, wherein the first working machine has a rectifier and a power generation function. The work implement is arranged in series with the engine and is directly connected to the engine output shaft, and the second work implement is arranged in parallel with the engine and is also interlocked with the engine output shaft through a transmission mechanism to prevent exhaust air from the engine and 1
Of the working machine with a power generating function is provided with an exhaust path for circulation and the downstream end of the exhaust path is communicated with the outside of the soundproof case, and the bottom of the soundproof case near the rectifier of the working machine with a power generating function is provided. A soundproof engine-driven working machine set characterized in that a cooling air intake for a working machine with a power generation function is formed in the. 2. The soundproof engine-driven working machine set according to claim 1, wherein an air compressor and an air tank are arranged as a second working machine, and an engine cooling air intake is formed at the bottom of the soundproof case. A soundproof engine-driven working machine set characterized in that a cooling air intake for use is formed at the bottom of the soundproof case directly below the air tank. 3. The soundproof engine-driven working machine set according to claim 1 or 2, wherein the starter rope of the recoil starter of the engine is extended to the operation panel surface on the side wall of the soundproof case, and the knob can be pulled out to the operation panel surface. A sound-proof engine-driven working machine set characterized by being mounted on.