JP5968147B2 - Engine working machine - Google Patents

Description

  The present invention relates to an engine work machine, and more particularly to a soundproof structure in an engine work machine in which a work machine such as a generator, a compressor, a hydraulic unit, and a pump and an engine that drives the work machine are housed in a casing. .

  In an engine working machine in which a working machine such as a generator and an engine that drives the working machine are housed in a casing, a sound absorbing material is provided in the casing and the intake and exhaust ports so that the operating sound of the engine and the working machine does not leak to the outside. Adopting a soundproof structure such as sticking. In addition, the intake sound of the engine is reduced by connecting an open end of a branch pipe having one end opened and the other end closed in the middle of the intake pipe communicating with the air cleaner intake (for example, , See Patent Document 1). There is also known a structure in which an intake duct is provided on the inspection door. In this case, the duct provided on the inspection door cannot be made higher than the height of the opening for the inspection door. was there.

Japanese Patent Laid-Open No. 11-141425

  However, in the above-mentioned Patent Document 1, the length and the inner diameter of the branch pipe must be appropriately set according to the structure and the rotational speed of the engine, and a plurality of branch pipes are connected to the intake pipe. In addition, it took time and effort to install an intake pipe connected to a branch pipe having a length of about 1 m inside the casing. Further, when adopting the soundproof structure, it should not adversely affect general maintenance work, for example, filter maintenance work in an air cleaner.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an engine working machine having a simple structure and a soundproof structure capable of reducing engine intake noise.

  In order to achieve the above object, an engine working machine according to the present invention houses a working machine and an engine that drives the working machine inside a casing, and is provided with combustion and cooling on the side wall portion of the casing. In the engine working machine provided with an intake port for sucking air into the casing, a first duct for guiding the air sucked from the intake port toward the upper portion of the casing is passed through the first duct. A second duct for guiding the air toward the horizontal direction along the side wall provided with the air inlet at the upper part of the casing; and a second duct provided at the upper part of the casing in a direction parallel to the second duct. And a combustion air intake port of the engine is provided on the bottom surface of the third duct, and the air sucked from the intake port is provided in the first duct. Then, a part of the air passing through the second duct and flowing out from the end opening of the second duct flows into the third duct from the opening of the third duct, and is sucked into the combustion air intake port for combustion. The remaining air that flows out from the end opening of the second duct becomes cooling air.

  Further, the intake port is provided in an inspection door that opens and closes an inspection port provided in a side wall of the casing, the first duct is integrally provided on an inner side of the inspection door, and the second duct An opening communicating with the upper opening of the first duct is provided on the bottom surface, and the movement of the first duct accompanying opening and closing of the inspection door is permitted between the outer edge of the upper opening and the outer edge of the opening, and It is preferable to provide a packing that seals the outer edge of the upper opening and the outer edge of the opening when the inspection door is closed. Furthermore, it is preferable that the second duct and the third duct are provided above the work implement. The bottom plates of the second duct and the third duct may be located near the upper edge of the inspection port. Furthermore, an air cleaner provided with the combustion air intake port is provided inside the casing of the first duct, below the bottom plate of the second duct and the third duct, and has a filter mounted inside the air cleaner. It is preferable to form a lid that covers the opening to be taken in and out so as to be detachable from the inspection port.

  According to the engine working machine of the present invention, since the air sucked into the combustion air intake port of the engine passes through the first duct, the second duct, and the third duct from the intake port, the intake sound of the combustion air intake port is generated. It becomes difficult to leak from the air inlet to the outside. In addition, by providing packing between the outer edge of the upper opening of the first duct provided on the inner side of the inspection door and the outer edge of the opening provided on the bottom surface of the second duct, the opening and closing operation of the inspection door is adversely affected. In addition, sound insulation when the inspection door is closed can be improved. Moreover, each duct can be arrange | positioned, without enlarging a casing by providing a 2nd duct and a 3rd duct above the working machine with low height compared with an engine. Furthermore, the filter can be easily removed from the air cleaner by providing an air cleaner below the bottom plate of the second duct and the third duct so that the lid can be attached and detached from the inspection port.

It is II sectional drawing of FIG. It is principal part sectional drawing of the engine working machine which shows the 1st example of this invention. It is a front view of an engine work machine similarly. It is a top view of an engine work machine similarly. It is principal part explanatory drawing of the engine working machine at the time of air filter replacement | exchange. It is VI-VI sectional drawing of FIG. It is a front view of the engine working machine which shows the 2nd form example of this invention.

  FIGS. 1 to 5 show a first embodiment of the present invention. The engine work machine 11 includes a front side wall 13a and a rear side wall that are provided upright from the four sides of a rectangular base 12 in plan view. 13b, a casing 13 formed in a rectangular parallelepiped shape by a control panel side wall 13c and an exhaust chamber side wall 13d, and a ceiling member 13e covering an upper opening surrounded by the side wall portion including the side walls 13a, 13b, 13c, 13d. , A generator 14 that is one of the working machines, an engine 15 that drives the generator 14, and equipment such as a fuel tank 16, an air cleaner 17, a radiator 18, and a muffler 19. A partition wall 20 fitted with a radiator 18 is provided between the engine 15 and the muffler 19, and the inside of the casing 13 accommodates the engine 15 and the generator 14 by the partition wall 20. And an equipment chamber 21 is partitioned into a Haifushitsu 22 accommodating the exhaust pipe including the muffler 19. An oil guard 12 a is provided inside the gantry 12 so as to surround the fuel tank 16.

  Of the side wall portions of the casing 13, the front side wall 13a and the rear side wall 13b are provided with inspection doors 23 and 24 for opening and closing inspection ports 13f and 13g for performing maintenance work of the engine 15 and the like. The inspection doors 23 and 24 are provided with intake ports 23a and 24a for taking in cooling air and combustion air inside the casing 13, respectively. Inside the inspection doors 23 and 24, there are provided first ducts 23b and 24b, respectively, for guiding the air sucked from the air inlets 23a and 24a to the upper inside of the casing 13 and separating rainwater accompanied by the air. It has been. In addition, a terminal block 25 is provided in a lower portion on one side of the rear side wall 13b in a state of being recessed from the rear side wall 13b, and an openable / closable terminal block cover 25a is attached to the front opening of the terminal block 25. Furthermore, a suspension fitting 26 for lifting the engine work machine 11 is provided at the center of the upper surface of the ceiling member 13e.

  Two partition walls 27a and 27b are suspended in a direction parallel to the front side wall 13a and the rear side wall 13b above the upper ends of the inspection ports 13f and 13g and below the ceiling member 13e located in the upper part of the generator 14. Between the partition wall 27a on the front side wall 13a side and the front side wall 13a, a second duct 28 located above the first duct 23b on the front side wall 13a side is provided, and the partition wall 27b on the rear side wall 13b side is provided. And a rear side wall 13b, a second duct 29 is provided above the first duct 24b of the rear side wall 13b, and between the partition walls 27a and 27b, the second ducts 28 and 29 are parallel to each other. A third duct 30 is provided in any direction.

  The second duct 28 on the front side wall 13a side includes a ceiling member 13e, a partition wall 27a, a partition wall 28a provided on the front side wall 13a side, a bottom plate 28b, and reinforcing members 28c and 28c provided on both end openings. Is formed so as to guide air in the horizontal direction along the front side wall 13a, and an opening 28d communicating with the upper opening 23c of the first duct 23b on the front side wall 13a side is formed in the bottom plate 28b. . The second duct 29 on the rear side wall 13b side includes a ceiling member 13e, a partition wall 27b, a partition wall 29a provided on the rear side wall 13b side, a bottom plate 29b, and reinforcing members 29c provided on both end openings. 29c is formed so as to guide the air in the horizontal direction along the rear side wall 13b. The bottom plate 29b is formed with an opening 29d communicating with the upper opening 24c of the first duct 24b on the rear side wall 13b side. ing.

  A first duct associated with opening / closing of the inspection doors 23 and 24 is provided on the outer edge portions of the upper openings 23c and 24c of the first ducts 23b and 24b and the outer edge portions of the openings 28d and 29d of the second ducts 28 and 29. A packing 31 is provided that allows the movement of 23b and 24b and seals between the outer edges of the upper openings 23c and 24c and the outer edges of the openings 28d and 29d when the inspection doors 23 and 24 are closed. .

  The third duct 30 located between the second ducts 28 and 29 is directed in a direction parallel to the second ducts 28 and 29 by the ceiling member 13e, the pair of partition walls 27a and 27b, and the bottom plate 30a. It is formed so as to guide air. The cross-sectional areas of these ducts 23b, 24b, 28, 29, and 30 in the air flow direction are set according to the opening areas of the intake ports 23a and 24a.

  The air cleaner 17 of the engine 15 is provided below the bottom plates 28b, 29b, and 30a so as to fit between the first ducts 23b and 24b above the generator 14 while avoiding the upper part of the engine 15 having a high height. It has been. The combustion air intake port 17 a of the air cleaner 17 is provided so as to pass through an opening 30 b formed in the bottom plate 30 a of the third duct 30 and open to the lower portion of the third duct 30, and is mounted inside the air cleaner 17. The lid 17c that covers the opening through which the filter 17b is inserted and removed is formed so as to be detachable from the front inspection port 13f.

  In the engine generator 11 thus formed, the air sucked into the intake ports 23a and 24a flows from the first ducts 23b and 24b to the upper openings 23c and 24c and the openings 28d and 29d as shown by the arrow A in FIG. Then, the air flows into the second ducts 28 and 29, is guided in the horizontal direction parallel to the front side wall 13a and the rear side wall 13b, and flows into the inside of the casing 13 from the end openings 28e and 29e of the second ducts 28 and 29. A portion of the air that has flowed into the casing 13 from the ends of the second ducts 28 and 29, as shown by the arrow B in FIGS. 2 and 4, passes from the end opening 30c of the third duct 30 to the third duct 30. And is sucked into the combustion air intake port 17a opened in the opening 30b formed in the central portion of the bottom plate 30a to become combustion air. Further, the remaining air that has not flowed into the third duct 30 becomes cooling air, and is sucked into the radiator fan 18a and cooled by the radiator 18 as shown by an arrow C in FIGS. The air is exhausted from the upper part of the casing 11 through the air exhaust chamber 22.

  The intake sound generated at the combustion air intake port 17a is attenuated while passing through long paths of the third duct 30, the second ducts 28 and 29, and the first ducts 23b and 24b, and is further provided with a sound absorbing material provided in each duct. Since it is absorbed by (not shown), it is possible to greatly reduce the intake noise leaking outside through the intake ports 23a, 24a. Since the upper openings 23c, 24c of the first ducts 23b, 24b and the openings 28d, 29d of the second ducts 28, 29 are connected via the packing 31, the upper openings 23c, 24c and the openings 28d, The noise can be prevented from leaking to the outside from the space 29d, and the opening and closing of the inspection doors 23, 24 is not hindered.

  Furthermore, by arranging the second ducts 28, 29, the third duct 30, and the air cleaner 17 using the upper space of the generator 14 that is lower than the engine 15, the casing 13 can be increased in size. And an increase in weight can be suppressed. And since each duct can be formed only by assembling the partition wall and bottom plate which gave the simple process, workability | operativity is also favorable and the increase in material cost can also be suppressed.

  In addition, the air cleaner 17 is disposed below the second ducts 28 and 29 and the third duct 30 between the first ducts 23b and 24b provided on the inspection doors 23 and 24, respectively, and the lid 17c is disposed on the inspection port. Since it can be detached from 13f, as shown in FIG. In maintenance work of the air cleaner 17, the filter 17b can be easily taken out by opening the inspection door 23 and removing the lid 17c via the inspection port 13f.

  Similarly, the second ducts 28 and 29 and the third duct 30 are formed so as not to protrude greatly downward from the upper edges of the inspection ports 13f and 13g of the casing 13 but to fit within the upper side of the inspection ports 13f and 13g. By positioning the bottom plates 28b, 29b, 30a of the second ducts 28, 29 and the third duct 30 in the vicinity of the upper edges of the inspection ports 13f, 13g, the inspection ports 13f, 13g are formed in the same size as the conventional ones. The maintenance work of the engine 15 and the generator 14 from the inspection ports 13f and 13g can be performed in the same manner as before.

  6 and 7 show a second embodiment of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. .

  In the engine work machine 11 of this embodiment, the inspection door 24 having the air inlet 24a is provided only on the rear side wall 13b of the casing 13, and the ceiling member 13e communicates with the first duct 24b on the rear side wall 13b. A second duct 29 is provided, and a box-shaped third duct 30 is provided adjacent to the second duct 29. Also, both ends of the third duct 30 are closed, and a combustion air inflow opening 27c is provided in the partition wall 27b on the front side wall 13a side, and is sucked into the intake port 24a as shown by arrows A and B. A part of the air flowing out from the end opening 29e of the second duct 29 flows into the third duct 30 from the combustion air inflow opening 27c so as to go around the outer periphery of the third duct 30, and the third duct 30. Is sucked into the air cleaner 17 from the bottom.

  As described above, the second duct may be provided according to the position and the number of intake ports provided in the side wall portion of the casing 13 including the inspection door, and the combustion air inflow opening 27c of the third duct 30 is also appropriately set. Can be provided at any position. Further, the length and the cross-sectional area of the second duct and the third duct can be appropriately set according to the state of the air flow. Furthermore, when an air inlet is provided in a side wall other than the inspection door, the upper opening of the first duct and the opening of the second duct may be directly connected.

  DESCRIPTION OF SYMBOLS 11 ... Engine working machine, 12 ... Mount, 12a ... Oil guard, 13 ... Casing, 13a ... Front side wall, 13b ... Rear side wall, 13c ... Control panel side side wall, 13d ... Exhaust chamber side side wall, 13e ... Ceiling member, 13f , 13g ... Inspection port, 14 ... Generator, 15 ... Engine, 16 ... Fuel tank, 17 ... Air cleaner, 17a ... Combustion air inlet, 17b ... Filter, 18 ... Radiator, 18a ... Radiator fan, 19 ... Muffler, 20 ... partition wall, 21 ... equipment room, 22 ... air exhaust room, 23, 24 ... inspection door, 23a, 24a ... inlet, 23b, 24b ... first duct, 23c, 24c ... upper opening, 25 ... terminal block, 25a ... Terminal block cover, 26 ... Suspension fitting, 27a, 27b ... Partition wall, 27c ... Combustion air inflow opening, 28, 29 ... Second duct, 28a, 29a ... Partition wall, 28b, 9b ... bottom plate, 28c, 29c ... reinforcing member, 28d, 29d ... opening, 28e, 29e ... end opening, 30 ... third duct, 30a ... bottom plate, 30b ... opening, 31 ... packing

Claims (5)

An engine working machine that houses a working machine and an engine that drives the working machine inside the casing, and that includes an intake port that sucks combustion and cooling air into the casing on the side wall of the casing. The first duct for guiding the air sucked from the air inlet toward the upper part of the casing, and the side wall provided with the air inlet at the upper part of the casing. A second duct that is guided in a horizontal direction along the portion, and a third duct that is provided in an upper part of the casing in a direction parallel to the second duct, and the bottom surface of the third duct An engine combustion air intake port is provided, and air sucked from the intake port passes through the second duct through the first duct, and the end opening of the second duct is opened. Part of the air that has flowed out of the air flows into the third duct through the opening of the third duct, is sucked into the combustion air intake port, becomes combustion air, and flows out of the end opening of the second duct The engine working machine, wherein the remainder of the air is used as cooling air. The intake port is provided in an inspection door that opens and closes an inspection port provided in a side wall of the casing, and the first duct is integrally provided on an inner side of the inspection door, and is provided on a bottom surface of the second duct. An opening communicating with the upper opening of the first duct is provided, the first duct is allowed to move along with opening and closing of the inspection door between the outer edge of the upper opening and the outer edge of the opening, and the inspection is performed. 2. The engine working machine according to claim 1, further comprising a packing for sealing the outer edge of the upper opening and the outer edge of the opening when the door is closed. The bottom plate of the second duct and the third duct 2 Symbol placement engine working machine according to claim, characterized in that it is located at the edge near over the inspection port. The air cleaner provided with the combustion air intake port is provided inside the casing of the first duct and below the bottom plate of the second duct and the third duct, and takes in and out a filter attached to the inside of the air cleaner. 4. The engine working machine according to claim 2 , wherein a lid covering the opening is formed so as to be detachable from the inspection port . The engine work machine according to any one of claims 1 to 4, wherein the second duct and the third duct are provided above the work machine.

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