JP2005083356A - Sound insulation type engine driving work machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulation type engine driving work machine provided with an excellent sound insulation function and an efficient cooling function and capable of saving a space by reducing ground contact area. <P>SOLUTION: The inside of a sound insulation case C of the sound insulation type engine driving work machine 1 is divided into an upper part chamber and an engine chamber 2 which is a lower part chamber in the vertical direction by a lateral bulkhead 16. The upper part chamber is divided into a sound absorbing treatment chamber 3 and a heat exchanger chamber 4 by a longitudinal bulkhead 17. A cooling air intake 16a is provided on a sound absorbing treatment chamber 3 side of the lateral bulkhead 16. An air exhaust port 17a is provided in the longitudinal bulkhead 17. A cooling fan F is arranged at a position opposing to the cooling air intake 16a in the sound absorbing treatment chamber 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soundproof engine-driven work machine in which a work machine body such as a compressor, a generator, or a welder is housed in a soundproof case.

As shown in FIG. 4, the soundproof type engine driven work machine 101 includes an engine E ′, a work machine body G ′ driven by the engine E ′, a heat exchanger R ′, and the like housed in a soundproof case C ′. The heat exchanger R ′ such as a radiator or an oil cooler is cooled by a cooling fan F ′ attached to the engine E ′ or the electric motor D ′. In the configuration of the soundproof type engine driven work machine 101, conventionally, the cooling fan F ′ and the heat exchanger R ′ are installed facing each other, and the cooling air from the cooling fan F ′ is directly radiated from the heat exchanger R ′. A structure applied to the surface is known (for example, Patent Document 1). However, since the flow of the cooling air discharged from the cooling fan F ′ has a smaller air volume at the center than the air volume at the outer peripheral portion, the conventional soundproof type engine driven work machine 101 effectively uses the heat radiating surface of the heat exchanger R ′. Could not be used.
Therefore, as shown in FIG. 5, the flow of the cooling air from the cooling fan F ′ is dispersed by disposing the rectifying plate Fa ′ between the cooling fan F ′ and the heat exchanger R ′. An apparatus that evenly distributes cooling air to the entire heat radiation surface Ra ′ of the exchanger R ′ has been proposed (for example, Patent Document 2).
Japanese Patent Laying-Open No. 2002-004857 (paragraphs 0017 to 0057, FIG. 3) Japanese Patent Laying-Open No. 2003-214164 (paragraphs 0008 to 0009, FIG. 1)

  However, in the configuration in which the rectifying plate is interposed between the cooling fan and the heat exchanger described above, since the engine or the electric motor, the cooling fan, the rectifying plate, and the heat exchanger are arranged in parallel, the work machine body It has been an obstacle to miniaturization of. Further, when the cooling fan is provided close to the heat radiating surface of the heat exchanger in order to increase the cooling efficiency, there is a case where the wind noise of the cooling fan is generated.

  Further, in recent years, in the soundproof type engine-driven work machine, it is required to reduce the area of the grounding surface due to the installation in the building or the relationship between the floor area of the storage location, etc. It was difficult to meet such a request.

  The present invention is intended to solve the above-described problems, and has an excellent soundproofing function and an efficient cooling function, and is intended to save space by reducing the ground contact area. It is an object of the present invention to propose a soundproof type engine-driven work machine that can be used.

  In order to solve the above problems, the soundproof type engine-driven working machine according to the present invention has an interior of a soundproof case partitioned into an upper chamber and a lower chamber in a vertical direction by a horizontal partition, and the upper chamber is formed by a vertical partition. The soundproof case in the upper chamber, which is partitioned into a sound absorption chamber and a heat exchanger chamber, has an air suction port on a side surface of one of the soundproof cases in the lower chamber, and faces the side surface having the air suction port. The heat exchanger chamber is provided with a heat exchanger, and the lower chamber is provided with an engine and a work implement body driven by the engine. A soundproof type engine-driven working machine provided, wherein the horizontal partition wall is provided with a cooling air intake on the sound absorption processing chamber side, and the vertical partition wall is provided with an exhaust air discharge port. And cooling the sound absorption chamber A cooling fan at a position opposite to the inlet is characterized in that is provided.

  In the soundproof type engine-driven working machine, the heat exchanger is disposed at a position facing the exhaust air outlet in the heat exchanger chamber.

  Further, in the soundproof type engine-driven working machine, the horizontal partition wall is formed horizontally and the vertical partition wall is formed vertically.

The soundproof type engine-driven working machine of the present invention divides the inside of the soundproof case into an upper chamber and a lower chamber, thereby disposing the heat exchanger and the engine in the upper chamber and the lower chamber, and the bottom area of the soundproof case. Can be reduced, and the apparatus can be miniaturized.
Further, since the upper chamber is further divided into a sound absorption processing chamber and a heat exchanger chamber, noise due to engine driving and noise due to the flow of cooling air are absorbed in the sound absorption processing chamber, and further, in the heat exchanger chamber Noise absorption effect is added, so noise can be reduced.

  Further, in the soundproof type engine-driven working machine according to the present invention, the heat exchanger is disposed so as to face the exhaust air discharge port, and is not installed in proximity to the cooling fan disposed at the cooling air intake port. It has a structure. Therefore, since the cooling fan and the heat exchanger are arranged at a predetermined distance, the air velocity of the cooling air is less biased, and the heat radiation efficiency of the heat exchanger is reduced by the cooling air having a more uniform pressure distribution. Can be improved.

  Furthermore, the soundproof type engine-driven working machine according to the present invention has the horizontal partition wall formed horizontally and the vertical partition wall formed vertically, so that the cooling fan mounted on the horizontal partition wall and the vertical partition wall are mounted. The positional relationship of the heat exchangers is at right angles. Therefore, the cooling air sucked into the sound absorption processing chamber through the cooling air intake port by the action of the cooling fan changes its direction in the direction of the exhaust air exhaust port by approximately 90 degrees, and passes through the exhaust air exhaust port. The heat exchanger is discharged from the discharge port while cooling. Therefore, only a part of the heat radiating surface of the heat exchanger is prevented from being cooled, and the entire surface of the heat radiating surface of the heat exchanger is cooled by the cooling air having a more uniform pressure distribution. , Cooling efficiency can be improved.

DESCRIPTION OF EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the drawings. In the following description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
In addition, before and after in description, it shall respond | correspond with the direction in FIG.

<Configuration of soundproof engine driven work machine>
As shown in FIG. 1, a soundproof engine-driven work machine 1 according to the present embodiment includes an engine E, a work machine main body G driven by the engine E, a fuel tank T, an oil sub tank S, and a battery. B and the like have a bottom portion 10 (base), a rear surface portion 11 surrounding the four circumferences above the bottom portion 10, a front surface portion 12, left and right side surface portions 13 and 14 (see FIG. 2), and an upper surface portion 15 that closes the upper portion. It is formed in a rectangular parallelepiped shape and is housed inside the soundproof case C.

The soundproof case C is divided into an engine chamber 2 which is an upper chamber and a lower chamber by a horizontal transverse partition wall 16 which is horizontally provided in a portion slightly above the upper half. Furthermore, the upper chamber has a longitudinal partition wall 17 suspended downward at a position slightly closer to the front of the upper surface portion, so that the rear surface portion 11 side becomes the sound absorption processing chamber 3 and the front surface portion 12 side becomes the heat exchanger chamber 4. It is divided like this.
A sound absorbing material (not shown) is attached to the entire inner wall surface of the soundproof case C, the surface of the vertical partition walls, and the surface of the horizontal partition walls.

  Further, the bottom 10 of the soundproof case C is composed of a member formed in a rectangular parallelepiped whose upper surface is opened by processing a single steel plate, and in the vicinity of the middle of the side wall 10e of the bottom 10 in the height direction. A tank mounting plate 10b is disposed as a plate for mounting the tank T. The tank mounting plate 10b has a floor member (hereinafter referred to as a “lower floor member”) 10a and a predetermined space 10c of the bottom portion 10, a fuel tank T, an oil sub tank S, a tank mounting plate 10b, and a lower floor member. 10a and a double floor structure.

(1) Engine chamber An engine E is disposed on the front side in the front-rear direction of the upper surface of the fuel tank T in the engine chamber 2, and an actuator main body G is connected to the rear side of the engine E. . Further, on the front side of the engine E, an oil sub tank S is disposed on the upper surface of the tank mounting plate 10b via the mounting plate 21.

  In addition, an air inlet 11a is formed at the lower part of the rear surface part 11 corresponding to the engine room 2 of the soundproof case C, and an air outlet 12a is formed at the upper part of the front part 12 corresponding to the heat exchanger room 4. Yes. In addition, a maintenance inspection door 12b is formed on the front surface portion 12 below the exhaust port 12a so as to be freely opened and closed.

  An intake duct 33 is provided inside the air inlet 11a of the soundproof case C. The intake duct 33 has a cross section formed by an L-shaped member 31 having a substantially L-shaped cross section formed by a horizontal wall 31a and a vertical wall 31b, and a vertical wall 32b connecting the upper and lower horizontal walls 32a and 32c and the two horizontal walls. And an S-shaped member 32 having a crank shape.

  The front end of the lateral wall 31 a of the L-shaped member 31 is in contact with the inner surface of the rear surface portion 11. The S-shaped member 32 has the tip of the upper lateral wall 32a abutting against the rear surface portion 11 so that a desired space is formed between the upper lateral wall 32a and the upper end of the vertical wall 31b of the L-shaped member 31. It is touched. The length in the front-rear direction of the lateral wall 32 a on the upper side of the S-shaped member 32 is approximately twice the length in the front-rear direction of the lateral wall 31 a of the L-shaped member 31, and the vertical wall 31 b of the L-shaped member 31 and the S-shaped member 32. A space is formed between the vertical wall 32b and the vertical wall 32b. The S-type member 32 has a vertical wall 32b of the S-type member 32 so that the lower side wall 32c forms a wind guide path with a desired distance from the upper surface of the fuel tank T. Is formed so as to protrude forward. Further, an opening 32d is formed in the upper side wall 32a of the S-shaped member 32, and a part of the cooling air is discharged from the opening 32d.

  The fuel tank T is attached to the tank attachment plate 10b, and is stored in a space 10c formed between the tank attachment plate 10b and the lower floor member 10a. The shape of the fuel tank T is formed in a thin rectangular parallelepiped, and the thickness is formed to be slightly thinner than the space 10c formed between the tank mounting plate 10b and the lower floor member 10a. Further, the length in the front-rear direction is shorter than the length in the front-rear direction of the soundproof case C, and the fuel tank T is arranged slightly rearward from the center in the front-rear direction, so that the front side of the fuel tank T in the space 10c Thus, a place where desired piping is possible is secured below the oil sub tank S. The width in the left-right direction is slightly shorter than the width of the soundproof case C, and is installed in a state spaced from the left and right side surfaces 13, 14 of the bottom 10. The plane area of the fuel tank T is formed larger than the plane area of the engine E and the work implement main body G, and is formed in a shape that covers the lower surfaces of the engine E and the work implement main body G in the installed state. .

Between the engine E and the front surface portion 12 of the soundproof case C, an oil sub-tank S is disposed on the tank mounting plate 10b via a mounting plate 21 whose side section is formed in a box shape. The oil sub-tank S is connected to an oil pan attached to the lower part of the engine E by an oil return pipe 40.
The oil sub-tank S covers the front surface (left-right direction) of the engine E, and the fuel tank T covers the lower surface of the engine E, so that substantially the entire lower surface of the engine E and the work implement main body G and the front side of the side. It is shielded and has a sound insulation structure.
A battery B is disposed on the right upper side of the oil sub tank S via a battery mounting base 22 and a battery seat 22a.

(2) Sound absorption processing chamber The sound absorption processing chamber 3 is a chamber having a function for effectively attenuating the noise of the engine E as a expansion chamber of the silencer.
As shown in FIGS. 1 and 2, a cooling air intake 16a, which is a circular opening substantially equal to the rotation radius of the cooling fan F, is formed at a position corresponding to the sound absorption processing chamber 3 on the horizontal wall, and the engine The chamber 2 and the sound absorption processing chamber 3 communicate with each other. And the cooling fan F is horizontally arrange | positioned so that a rotating shaft may become a perpendicular direction through the attachment bracket directly on the cooling wind inlet 16a. The vertical partition wall 17 is also formed with a rectangular exhaust outlet 17a corresponding to the size of the cooling surface of the radiator (heat exchanger) R.
Since the sound absorption processing chamber 3 plays a role for attenuating the noise of the engine E, no device other than the cooling fan F is arranged.

(3) Heat exchanger chamber On the wall surface of the vertical partition wall 17 on the heat exchanger chamber 4 side, a radiator R connected to the engine E is arranged so that the heat radiating surface corresponds to the exhaust air outlet. ing. Further, a muffler M connected to the engine E is installed horizontally in a state of being close to the exhaust port 12a.

<Action and effect>
Various actions and effects of the soundproof type engine driven working machine 1 of the present invention will be described.
As shown in FIG. 3 (reference numeral W indicates the flow of cooling air), the cooling air W sucked into the intake duct 33 from the air intake port 11a by the action of the cooling fan F in the sound absorption processing chamber 3 is an L-shaped member. Guided upward from 31 and guided to the lower part of the soundproof case C by the S-shaped member 32. The cooling air W guided to the lower part spreads over the entire upper surface of the tank mounting plate 10b and the fuel tank T. Then, while cooling the engine E, the work implement main body G, the oil sub tank S, the oil return pipe 40 and the like disposed on the upper surface of the tank mounting plate 10b and the fuel tank T in the engine chamber 2, the interior of the engine chamber 2 is Ascending and guided to the sound absorption chamber 3. Further, the cooling air W guided upward is mixed with the cooling air W discharged from the opening 32d of the S-shaped member 32, whereby the temperature thereof is lowered, and the sound absorption process is performed through the cooling air intake port 16a. Inhaled into chamber 3. Then, the direction is changed by approximately 90 degrees in the direction of the exhaust air discharge port 17a, and the radiator R is discharged through the exhaust air port 12a while cooling the radiator R.

Therefore, according to the soundproof type engine-driven generator 1, the entire cooling surface of the radiator R is cooled by the cooling air W having a uniform pressure distribution, thereby improving the cooling efficiency of the radiator R. Can be made.
In addition, the radiator R is disposed opposite to the exhaust air discharge port 17a, and is not installed adjacent to the cooling fan F disposed in the cooling air intake port 16a. Since the cooling fan F and the radiator R are disposed at a predetermined distance, the rectifying effect of the cooling air W is increased, so that the heat dissipation efficiency of the radiator R can be improved.

Further, since the noise of the engine E tends to leak from the open portion of the soundproof case C, it passes through the cooling air intake 16 a at the top of the engine chamber 2 and is guided to the sound absorption processing chamber 3. Then, it is rapidly expanded in the sound absorption processing chamber 3, reflected on the inner wall surface, and absorbed by the sound absorbing material, and after being reduced in sound, is guided to the heat exchanger chamber 4 and further absorbed. It is discharged from the air vent 12a.
Therefore, an excellent soundproofing effect can be exhibited.

As mentioned above, although an example about a suitable embodiment was explained about the present invention, the present invention is not restricted to the embodiment concerned, and design change is possible suitably in the range which does not deviate from the meaning of the present invention.
For example, the positions of the air inlet and the air outlet are not limited as long as the cooling air discharged from the air outlet is arranged so as not to be directly sucked from the air inlet.
Further, the positions and sizes of the upper chamber and the lower chamber are not limited.

It is side sectional drawing of the soundproof type engine drive working machine of this invention. It is XX sectional drawing in FIG. It is the sectional side view which showed the flow of the cooling air in a soundproof type engine drive working machine It is side sectional drawing of the conventional soundproof type engine drive working machine. It is a sectional side view which shows the cooling structure of the other conventional soundproof type engine drive working machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soundproof type engine drive working machine 2 Engine room 3 Sound absorption processing room 4 Heat exchanger room 11 Rear surface part 11a Air intake port 12 Front part 12a Air exhaust port 16 Horizontal partition 16a Cooling air intake port 17 Vertical partition wall 17a Exhaust air exhaust port C Soundproof case E Engine F Cooling fan G Work implement body R Radiator (heat exchanger)

Claims (3)

The interior of the soundproof case is partitioned into an upper chamber and a lower chamber in the vertical direction by a horizontal partition, and
The upper chamber is partitioned into a sound absorption chamber and a heat exchanger chamber by a vertical partition;
A side surface of one of the soundproof cases in the lower chamber has an air inlet, and a side surface of the soundproof case in the upper chamber facing the side surface having the air inlet,
The heat exchanger chamber is provided with a heat exchanger,
The lower chamber is a soundproof engine-driven work machine in which an engine and a work machine main body driven by the engine are disposed,
A cooling air intake is provided on the sound absorption processing chamber side of the horizontal partition wall, and an exhaust air discharge port is provided on the vertical partition wall,
A soundproof type engine-driven working machine, wherein a cooling fan is disposed at a position facing the cooling air inlet in the sound absorption processing chamber.   The soundproof engine-driven work machine according to claim 1, wherein the heat exchanger is disposed at a position facing the exhaust air discharge port in the heat exchanger chamber. The soundproof type engine-driven working machine according to claim 1 or 2, wherein the horizontal partition wall is horizontal and the vertical partition wall is vertical.

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