WO2021210361A1 - Engin de chantier - Google Patents

Engin de chantier Download PDF

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Publication number
WO2021210361A1
WO2021210361A1 PCT/JP2021/012032 JP2021012032W WO2021210361A1 WO 2021210361 A1 WO2021210361 A1 WO 2021210361A1 JP 2021012032 W JP2021012032 W JP 2021012032W WO 2021210361 A1 WO2021210361 A1 WO 2021210361A1
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WO
WIPO (PCT)
Prior art keywords
construction machine
dust
collection
intake
pocket
Prior art date
Application number
PCT/JP2021/012032
Other languages
English (en)
Japanese (ja)
Inventor
涼太 中原
林　秀樹
敦司 大森
賢次郎 組谷
佐藤　拓也
島田　学
Original Assignee
コベルコ建機株式会社
国立大学法人広島大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by コベルコ建機株式会社, 国立大学法人広島大学 filed Critical コベルコ建機株式会社
Publication of WO2021210361A1 publication Critical patent/WO2021210361A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/06—Guiding or ducting air to, or from, ducted fans

Definitions

  • the present invention relates to a construction machine including an engine chamber and a heat exchanger arranged in the engine chamber.
  • Patent Document 1 a construction machine having an engine chamber arranged at the rear of a vehicle of an upper swing body and having an engine, a heat exchanger, or the like arranged in the engine chamber is known (see, for example, Patent Document 1).
  • Patent Document 1 includes an intake duct arranged on the upstream side of the heat exchanger and the air intake duct in order to prevent dust contained in the outside air from clogging the heat exchanger and the like. Includes a dust filter provided to block the intake port of the intake duct. The dust filter removes foreign matter in the air, which allows clean air to be guided to the heat exchanger.
  • the dust filter has a mesh capable of capturing dust having a size that causes clogging in a heat exchanger or the like.
  • the increase in dust trapped in the mesh causes even small dust to adhere to the mesh. This blocks the holes in the mesh and prevents air from passing through the dust filter, causing overheating. It is necessary to clean the dust filter before such trouble occurs.
  • An object of the present invention is to provide a construction machine capable of suppressing a decrease in work efficiency due to cleaning of a dustproof filter.
  • a construction machine which is arranged in an engine chamber, an engine arranged in the engine chamber, and air outside the engine chamber arranged in the engine chamber into the engine chamber.
  • the cooling fan for suction, the heat exchanger arranged in the engine chamber so that the air sucked into the engine chamber by the cooling fan passes, and the heat exchanger on the upstream side of the heat exchanger in the flow direction of the air.
  • It includes an intake chamber that is arranged independently of the engine chamber and a dust collecting unit that is connected to the intake chamber.
  • the dust collecting unit includes a tubular body, a collecting pocket, and an air flow suppressing member.
  • the tubular body has both ends and bent portions located between the both ends.
  • Both ends form an intake port that opens to the outside of the intake chamber and a connection port that opens into the intake chamber at a position opposite to the intake port.
  • the tubular body has a shape that bends at the bent portion.
  • the collection pocket is located on the downstream side of the inner wall surface of the tubular body constituting the outer corner portion of the bent portion in the intake direction, which is the direction of the air flow from the intake port to the connection port.
  • a collection space that opens toward the outer corner portion is defined so as to collect dust separated from the air at the outer corner portion.
  • the airflow suppressing member is arranged in the collecting space so as to suppress the formation of the airflow in the collecting space.
  • FIG. 1 is a side view of a construction machine according to an embodiment of the present invention.
  • FIG. 2 is a rear view showing the inside of the upper swing body in the construction machine.
  • FIG. 3A is a diagram showing a cross section taken along the line 3A-3A in FIG.
  • FIG. 3B is a diagram showing a cross section taken along the line 3B-3B in FIG.
  • FIG. 4A is a diagram showing an air flow formed in the collection pocket according to the comparative example.
  • FIG. 4B is a diagram showing an air flow formed in the collection pocket according to the embodiment.
  • FIG. 5A is a cross-sectional view of the dust collecting unit according to the embodiment.
  • FIG. 5B is a perspective view of the dust collecting unit according to the embodiment as viewed from an obliquely upper position of a bent portion of the dust collecting unit.
  • FIG. 5C is a cross-sectional perspective view of the dust collecting unit according to the embodiment as viewed from a position diagonally above the intake port of the dust collecting unit.
  • FIG. 6A is a cross-sectional view showing a state in which the collection pocket of the dust collection unit is opened.
  • FIG. 6B is a perspective view of the state shown in FIG. 6A as viewed from an obliquely upper position of the bent portion.
  • FIG. 7A is a cross-sectional view showing a state in which the dust collecting case of the dust collecting unit is taken out.
  • FIG. 7B is a perspective view of the state shown in FIG.
  • FIG. 7A is viewed from an obliquely upper position of the bent portion.
  • FIG. 8 is a perspective view of the dust collecting unit of the construction machine according to the first modification, as viewed from a position diagonally above the intake port of the dust collecting unit.
  • FIG. 9 is a perspective view of the dust collecting unit of the construction machine according to the modified example 2 as viewed from a position diagonally above the intake port of the dust collecting unit.
  • FIG. 10 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the third modification.
  • FIG. 11 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 4.
  • FIG. 12 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 5.
  • FIG. 13 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 6.
  • FIG. 14 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 7.
  • FIG. 15 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 8.
  • FIG. 16 is a cross-sectional view of a dust collecting unit and an intake chamber in the construction machine according to the modified example 9.
  • FIG. 1 is a side view of the construction machine 10 according to the embodiment
  • FIG. 2 is a rear view showing the inside of the upper swing body 12 in the construction machine 10.
  • the directions described below correspond to the directions indicated by the arrows in FIGS. 1 and 2.
  • the construction machine 10 includes a crawler-type lower traveling body 11, the upper swivel body 20, and an attachment 13.
  • the upper swivel body 20 is mounted on the lower traveling body 11 so as to be swivelable.
  • the upper swing body 20 includes a cab 14, a machine room 15, and an upper frame 21.
  • the construction machine 10 is, for example, a small swivel type, and the upper swivel body 20 is configured to be relatively small so that the swivel radius is small.
  • the attachment 13 is attached to the front portion of the upper swing body 20.
  • the attachment 13 includes a boom 13a, an arm 13b, a bucket 13c, and a plurality of hydraulic cylinders 13d.
  • Each of the plurality of hydraulic cylinders 13d expands and contracts, and the boom 13a, the arm 13b, and the bucket 13c are interlocked with each other.
  • the expansion / contraction operation is hydraulically controlled so that work such as excavation is performed according to the operation performed in the cab 14.
  • the upper frame 21 constitutes the lower part of the upper swing body 20, and the cab 14 and the machine room 15 are arranged on the upper frame 21.
  • the cab 14 constitutes, for example, a rectangular box-shaped cab at a position adjacent to the attachment 13.
  • the machine room 15 is formed at the rear portion of the upper swing body 20.
  • the machine room 15 is defined by a counterweight 22 and a machine room cover 16.
  • the counterweight 22 is arranged along the outer peripheral edge of the rear portion of the upper swing body 20.
  • the machine room cover 16 is arranged so as to cover the machine room 15 from above.
  • the counterweight 22 is arranged between the counterweight 22 and the attachment 13 to ensure a front-rear weight balance.
  • Maintenance openings 23 are formed on both sides of the counterweight 22, and maintenance of various devices arranged in the machine room 15 is performed through the maintenance openings 23.
  • a rear cover 24 for opening and closing the maintenance opening 23 is attached to the counterweight 22.
  • the engine 31, the hydraulic pump 32, and the cooling device are housed in the machine room 15.
  • the engine 31 has a drive shaft, and is arranged in the machine room 15 so that the drive shaft faces the left-right direction of the upper swing body 12.
  • the cooling device is a device for cooling the engine 31, and includes a heat exchanger 35, a cooling fan 33, a fan shroud 34, and an intake duct 40.
  • the intake duct 40, the heat exchanger 35, the cooling fan 33, the engine 31, and the hydraulic pump 32 are arranged side by side in order from the upstream side in the air flow direction in the machine room 15. There is.
  • a partition wall 17 is provided inside the machine room 15, and the partition wall 17 divides the machine room 15 into an engine room 15a and an intake room 15b.
  • the heat exchanger 35, the cooling fan 33, and the engine 31 are arranged in the engine chamber 15a, and the intake duct 40 is arranged in the intake chamber 15b.
  • the heat exchanger 35 has a core surface, and is arranged so that the core surface faces the vehicle in the left-right direction.
  • the heat exchanger 35 is composed of, for example, a radiator, and causes heat exchange between the air passing through the heat exchanger 35 and the refrigerant for cooling the engine 31.
  • the cooling fan 33 is connected to one end of the drive shaft of the engine 31, the left end in FIG. 2, and is interposed between the engine 31 and the heat exchanger 35.
  • the fan shroud 34 is arranged so as to surround the cooling fan 33, and guides the air that has passed through the heat exchanger 35 to the engine 31.
  • the hydraulic pump 32 is connected to the other end of the drive shaft of the engine 31, the right end in FIG.
  • the intake duct 40 surrounds the space on the downstream side of the heat exchanger 35 so as to seal the air flow direction in the machine room 15.
  • a dustproof filter 44 is attached to the intake duct 40.
  • the dust filter 44 is attached to the intake duct 40 so as to close the opening on the upstream side in the air flow direction, that is, the intake port, among the openings at both ends of the intake duct 40, and clogs the heat exchanger 35 and the like.
  • the dust having a size that causes the above-mentioned air is captured and removed from the air.
  • the construction machine 10 further includes a dust collecting unit 50.
  • the dust collecting unit 50 is connected to the intake chamber 15b.
  • the dust collecting unit 50 according to the present embodiment includes a tubular body TB, a collecting pocket 51, and an airflow limiting member.
  • the tubular body TB is connected to the intake chamber 15b while being arranged outside the intake chamber 15b. That is, the tubular body TB is an intake cylinder externally attached to the intake chamber 15b, and surrounds an intake passage 50d which is a flow path of air taken into the intake chamber 15b. Specifically, the tubular body TB has both end portions and bent portions 50c located between the both end portions. Both ends form an intake port 50a and a connection port 50b located on the opposite side thereof.
  • the tubular body TB has the machine room cover 16 so that the connection port 50b passes through the opening 16a formed in the machine room cover 16, that is, the connection port 50b opens into the intake chamber 15b. Connected to.
  • the machine room cover 16 includes an intake chamber side portion constituting the top wall of the intake chamber 15b, and the opening 16a is provided at an appropriate position of the intake chamber side portion, for example, the upper left side of the machine room cover 16.
  • the machine room cover 16 also includes an engine room side portion constituting the top wall of the engine room 15a, and an exhaust port 16b is provided at an appropriate position on the engine room side portion, for example, the upper right side of the machine room cover 16.
  • the tubular body TB has a shape that bends at the bent portion 50c located between the intake port 50a and the connection port 50b.
  • the collection pocket 51 is provided on the downstream side of the inner wall surface of the outer corner of the inner wall surface of the tubular body TB, which constitutes the outer corner portion 50f of the bent portion 50c, with respect to the air flow direction in the tubular body TB. Be done.
  • the outer corner portion 50f is a portion of the cylindrical wall of the tubular body TB constituting the bent portion 50c and located outside the intake passage 50d in the bending radial direction.
  • the collection pocket 51 defines a collection space inside the collection pocket 51.
  • the collection space opens upward in this embodiment toward the outer corner portion 50f so that dust separated from the air at the outer corner portion 50f is collected in the collection space. ..
  • the collection space is defined by, for example, an outer wall portion 53 of the tubular body TB and a partition wall 52, as shown in FIG.
  • the outer wall portion 53 is a portion of the peripheral wall constituting the downstream portion of the tubular body TB that extends from the outer corner portion 50f to the downstream side in the intake direction, and the downstream portion is the cylinder. It is a portion from the bent portion 50c to the connection port 50b in the shape TB.
  • the partition wall 52 divides the inside of the downstream side portion into an outer space on the side close to the outer corner portion 50f (right side space in FIG. 2) and an inner space on the opposite side (left side space in FIG. 2).
  • the outer space corresponds to the collection space.
  • the airflow suppression member includes a plurality of partition plates 65 as shown in FIGS. 3A and 3B, and the plurality of partition plates 65 suppress the formation of airflow in the collection space of the collection pocket 51. As described above, it is arranged in the collection space in the collection pocket 51.
  • the plurality of partition plates 65 include three partition plates 65. Each of the plurality of partition plates 65 is arranged so as to be parallel to or substantially parallel to the inflow direction in which the outside air flows into the collection pocket 51 through the intake port 50a.
  • the plurality of partition plates 65 are arranged at intervals in the space partition direction orthogonal to the intake direction, and in the left-right direction in FIGS. 3A and 3B, so that the space in the collection pocket 51, that is, the collection space Is partitioned into a plurality of small spaces 66 arranged in the space partition direction.
  • the plurality of partition plates 65 are preferably connected to the bottom of the collection pocket 51 in a posture perpendicular to or substantially perpendicular to the bottom of the collection pocket 51 so as not to interfere with the collection of dust into the collection pocket 51. NS.
  • the dust collecting unit 50 of the present embodiment described above can effectively collect relatively large dust in the air sucked into the intake chamber 15b through the cylindrical body TB. Specifically, outside air flows into the tubular body TB through the intake port 50a of the tubular body TB in the dust collecting unit 50, and among the dust contained in the outside air, the heat exchanger 35 and the like are clogged. A part or all of the large-diameter dust having a size that causes the above-mentioned dust is separated from the outside air at the bent portion 50c by utilizing the large inertia of the dust, and is collected in the collection pocket 51.
  • a part or all of the large-diameter dust contained in the outside air is different from the outside air that sufficiently changes direction at the bent portion 50c as shown by a solid arrow in FIG. 2, and the large-diameter dust is large.
  • the inertia prevents a sufficient turn, which causes the bent portion 50c to collide with the inner wall surface of the outer corner portion 50f.
  • the large-diameter dust then proceeds to the downstream side in the intake direction along the inner wall surface as shown by the broken line arrow in FIG. 2, and is collected in the collection space in the collection pocket 51. This eliminates the need to frequently clean the dust adhering to the dust filter as in the conventional construction machine even when the construction machine 10 is used in an environment where a large amount of dust is suspended, and the cleaning is executed. Suppresses the decrease in work efficiency.
  • the airflow suppression member provided in the collection pocket 51 in this embodiment, the plurality of partition plates 65, suppresses the airflow formed in the collection space of the collection pocket 51, thereby suppressing the airflow. It suppresses the formation of a large vortex by the outside air flowing into the collection pocket 51. This prevents the dust once collected in the collection pocket 51 from flowing out from the collection pocket 51 due to the vortex of the air flow generated in the collection pocket 51.
  • the airflow suppression member may include only a single partition plate 65. That is, only the single partition plate 65 may be arranged in the collection space.
  • the single partition plate 65 can also suppress the formation of airflow by partitioning the collection space into a plurality of spaces.
  • FIG. 4A shows the airflow formed in the collection pocket 151 according to the comparative example with an arrow
  • FIG. 4B shows the airflow formed in the collection pocket 51 according to the present embodiment with an arrow.
  • the collection space in the collection pocket 151 according to the comparative example is not provided with a partition plate
  • the collection space in the collection pocket 51 according to the embodiment has three partition plates.
  • 65 is provided to divide the collection space into four small spaces 66 arranged in the spatial arrangement direction (horizontal direction in FIG. 4B).
  • the air that has entered the single large space 67, that is, the collection space, in the collection pocket 151 without a partition plate flows back as a large vortex, and the collection pocket There is a risk that the dust once collected in the 51 will flow out from the collection pocket 51.
  • the plurality of partition plates 65 provided in the collection space in the collection pocket 51 are such that the collection space is divided into a plurality of small spaces 66.
  • the airflow formed in the collection space can be limited to the small airflow in the small space, whereby the formation of an unfavorable airflow such as the large vortex can be suppressed.
  • the collection pocket 151 not provided with a partition plate dust is blown and accumulated at both ends of the collection pocket 151 in the longitudinal direction (left-right direction in FIG. 4A), and the dust is also collected by this. While it is easy to flow out from the collection pocket 151, the plurality of partition plates 65 for partitioning the collection space of the collection pocket 51 in the space partitioning direction corresponding to the longitudinal direction are formed in the longitudinal direction of the collection pocket 51. It is possible to prevent dust from being blown and accumulated at both ends of the space.
  • the cross section of the outer wall surface of the outer corner of the dust collecting unit 50 according to the present embodiment that is, the inner wall surface of the outer corner portion 50f of the bent portion 50c is arcuate. This suppresses the generation of a vortex in the vicinity of the inner wall surface of the outer corner, thereby suppressing the vortex from lowering the intake efficiency.
  • the tubular body TB of the dust collecting unit 50 is bent at a substantially right angle at the bent portion 50c, that is, at an angle of 90 ° or approximately 90 °.
  • a portion of the tubular body TB between the intake port 50a and the bent portion 50c, that is, an upstream portion is in a horizontal or substantially horizontal posture with the upper surface of the intake chamber 15b. Allows to be placed.
  • the bending angle of the tubular body TB at the bent portion 50c is preferably in the range of 85 ° or more and 95 ° or less, more preferably in the range of 87.5 ° or more and 92.5 °. More preferably, it is in the range of 89 ° or more and 91 ° or less.
  • the tubular body TB of the dust collecting unit 50 according to the construction machine 10 of the present embodiment has an inviting shape having a cross section that becomes smaller as the distance from the intake port 50a increases in the vicinity of the intake port 50a, that is, an intake path for outside air. It has a shape that attracts within 50d.
  • the invitation shape suppresses the occurrence of pressure loss during inspiration.
  • the collection space of the collection pocket 51 is the connection between the outer wall portion 53 extending from the outer corner portion 50f to the downstream side in the intake direction, the bending portion 50c, and the bending portion 50c. It is defined by a partition wall 52 that divides the space with the mouth 50b into an outer space and an inner space. This allows the collection pocket 51 to be formed with a simple structure.
  • the inner wall surface on the side closer to the intake port 50a is the inner inner wall surface (FIG.
  • the inner wall surface on the left side in 5A) is the inner end of both ends of the tubular body TB forming the connection port 50b (lower end in FIG. 5A), that is, the end closer to the intake port 50a. It is closer to the inner wall surface of the outer corner.
  • the downstream side portion is recessed in a direction closer to the outer corner portion 50f than the end portion of the connection port 50b on the side closer to the intake port 50a. This suppresses the generation of a vortex in the vicinity of the inner wall surface on the downstream side close to the intake port 50a, that is, the inner inner wall surface, and suppresses the vortex flow from lowering the intake efficiency. be able to.
  • the tubular body TB according to the present embodiment is connected to the intake chamber 15b while being arranged outside the intake chamber 15b, the dust collecting unit 50 can be easily installed. Further, that the downstream portion from the bent portion 50c to the connecting port 50b is connected to the intake chamber 15b in a posture perpendicular to or substantially perpendicular to the upper surface of the intake chamber 15b means that the bent portion 50c is connected to the intake chamber 15b. The dust after colliding with the inner wall surface of the outer corner portion 50f can be efficiently collected in the collection space of the collection pocket 51 by the gravity.
  • the intake duct 40 surrounds the upstream space so as to seal the upstream space of the heat exchanger 35 in the intake chamber 15b, and the intake duct 40 of the intake duct 40.
  • the dust filter 44 which is mounted so as to block the intake port, captures large-diameter dust having a size that causes clogging in the heat exchanger 35 and the like, and removes the large-diameter dust from the air. Prevents large-diameter dust from entering the heat exchanger 35 and the like.
  • the collection pocket 51 is preferably configured to allow the dust collected in the collection pocket 51 to be taken out to the outside. This can prevent the amount of dust collected in the collection pocket 51 from increasing and the dust from easily jumping out of the collection pocket 51.
  • 5A, 5B and 5C are a cross-sectional view of the dust collecting unit 50, a perspective view of the dust collecting unit 50 viewed from an obliquely upper position of the bent portion 50c, and the dust collecting unit 50 of the intake port 50a. It is a perspective view seen from the diagonally upper position.
  • 6A and 6B are a cross-sectional view showing a state in which the collection pocket 51 of the dust collection unit 50 is opened, and a perspective view of the state as viewed from an obliquely upper position of the bent portion 50c.
  • 7A and 7B are a cross-sectional view showing a state in which the dust collecting case of the dust collecting unit 50 has been taken out, and a perspective view of the state as viewed from an obliquely upper position of the bent portion 50c, respectively.
  • the dust collecting unit 50 has a tubular body TB and a collecting pocket 51 like the dust collecting unit 50 shown in FIG.
  • the tubular body TB has a shape that bends at a bent portion 50c located between the intake port 50a and the connecting port 50b, and the collecting pocket 51 is an inner wall surface of an outer corner portion 50f at the bent portion 50c. It is provided on the downstream side of the intake direction to define the collection space.
  • the dust collecting unit 50 further has a connection base 60, and the connection base 60 is located below the connection port 50b.
  • the connection base 60 has a through hole 60a, and communicates the connection port 50b and the inside of the intake chamber 15b below the connection port 50b with each other through the through hole 60a.
  • the connection base 60 has a fastening bolt 59, and is attached to the upper surface of the intake chamber 15b (upper part of the machine room cover 16) by the fastening bolt 59.
  • the dust collecting unit 50 has a partition wall 52 similar to the dust collecting unit 50 shown in FIG. 2, and the partition wall 52 provides an internal space of a downstream portion from the bent portion 50c to the connection port 50b. It is divided into an outer space close to the outer wall portion 53 and an inner space on the opposite side thereof, which corresponds to the collection space. That is, the collection pocket 51 is formed by the partition wall 52 and the outer wall portion 53 extending downstream from the outer corner portion 50f in the intake direction.
  • the outer wall portion 53 is configured so that the collection space can be opened to the outside. Specifically, the outer wall portion 53 is separated from a portion of the tubular wall of the tubular body TB other than the outer wall portion 53. That is, the tubular body TB is formed with a take-out opening 50h having a shape corresponding to the shape of the outer wall portion 53, and the outer wall portion 53 has a shape capable of opening and closing the take-out opening 50h.
  • the dust collecting unit 50 further includes a pair of hinge members 54, a pair of locked members 55, and a pair of locking members 56.
  • the pair of hinge members 54 are arranged at intervals in the horizontal direction, and connect the lower end of the outer wall portion 53 and the connecting base 60.
  • the outer wall portion 53 is thereby supported by the connecting base 60 via the pair of hinge members 54 so as to be rotatable around the pair of hinge members 54.
  • the outer wall portion 53 can move between a closed position for closing the take-out opening 50h and an opening position for opening the take-out opening 50h. ..
  • the pair of locked members 55 are arranged at the upper ends of the outer wall portion 53 at intervals in the horizontal direction, and the pair of locking members 56 are bent portions of the cylindrical wall of the cylindrical body TB. They are arranged at intervals in the horizontal direction in the portions constituting the 50c.
  • the pair of locking members 56 can be engaged with the pair of locked members 55, respectively, and the engagement locks the outer wall portion 53 to the closed position.
  • the dust collecting unit 50 further includes a dust collecting case 57.
  • the dust collection case 57 is arranged in the collection pocket 51 so as to be removable from the collection pocket 51, and houses the dust 90 collected in the collection pocket 51.
  • the dust collecting case 57 is sandwiched between the outer wall portion 53 fixed at the closed position by engaging the pair of locked members 55 and the pair of locking members 56, and the partition wall 52. As a result, it is fixed at a fixed fixed position in the collection pocket 51.
  • the outer wall portion 53 preferably further includes a support portion 58 that holds the dust collecting case 57 in the fixed position.
  • the lower portion of the partition wall 52 is inclined toward the outer wall portion 53 so that the collection pocket 51 has a downwardly squeezed shape, and the partition wall of the dust collection case 57 is aligned with the partition wall 52. It is preferable that the portion closer to 52 is also inclined. This makes it possible to position the dust collecting case 57 by the weight of the dust collecting case 57 and the weight of the dust 90 contained therein.
  • the airflow suppressing member for example, a plurality of partition plates 65
  • the plurality of partition plates 65 are arranged so as to be parallel to or substantially parallel to the inflow direction of the outside air, and include a plurality of spaces inside the dust collecting case 57, that is, a space included in the collecting space. It is arranged so as to partition into the area of.
  • the inflow direction is a direction in which outside air flows into the collection pocket 51 through the intake port 50a.
  • the plurality of partition plates 65 may be connected to the bottom of the dust collecting case 57 in a posture perpendicular to or substantially perpendicular to the bottom of the dust collecting case 57 so as not to hinder the collection of dust into the dust collecting case 57. preferable.
  • the pair of dust collecting units 50 in order to perform normal intake air through the tubular body TB, as shown in FIGS. 5A, 5B and 5C, the pair of dust collecting units 50
  • the outer wall portion 53 is fixed at the closed position, that is, the position where the take-out opening 50h is closed by the locked member 55 and the pair of locking members 56.
  • the pair of locked members 55 and the pair of locking members 56 are used. The engagement is disengaged and the outer wall portion 53 is rotated to the opening position around the pair of hinge members 54.
  • the dust collecting case 57 preferably rotates to the opening position integrally with the outer wall portion 53.
  • the dust collecting case 57 can be removed from the collecting pocket 51, which means that the dust 90 in the dust collecting case 57 can be easily discarded. Allows to be done.
  • the dust 90 contained in the dust collecting case 57 can be easily taken out by a simple operation of moving the outer wall portion 53 from the closed position to the open position and opening the taking-out opening 50h. can.
  • At least the upstream end that is, the end near the bent portion 50c, is inclined along the bent portion 50c. preferable. This widens the entrance of the collection pocket 51, whereby the dust that collides with the inner wall surface of the outer corner portion 50f of the bent portion 50c and bounces off the collection pocket 51 (the dust collection case 57 If there is, it is easy to enter the dust collecting case 57).
  • FIG. 8 is a cross-sectional perspective view of the dust collecting unit 50A according to the first modification seen from a position diagonally above the intake port 50a.
  • the same components as those included in the above-described embodiment shown in FIG. 5C are designated by the same reference numerals.
  • the dust collecting unit 50A according to the first modification is different from the dust collecting unit 50 according to the above-described embodiment only in the following points. That is, the dust collecting unit 50A includes a plurality of partition plates 65A like the dust collecting unit 50, but as shown in FIG. 8, the plurality of partition plates 65 form a tubular body TB in the dust collecting unit 50A. It extends to the outside of the collection pocket 51 along the inner wall surface of the outer corner portion 50f.
  • the plurality of partition plates 65A according to the first modification make it possible to obtain the same effect as that of the above-described embodiment, and in addition, improve the rectifying action in the dust collecting unit 50A to obtain dust. Allows for increased recovery.
  • FIG. 9 is a cross-sectional perspective view of the dust collecting unit 50B according to the modified example 2 as viewed from a position diagonally above the intake port 50a.
  • the same components as those included in the above-described embodiment shown in FIG. 5C are designated by the same reference numerals.
  • the dust collecting unit 50B according to the second modification is different from the dust collecting unit 50 according to the above-described embodiment only in the following points. That is, the dust collecting unit 50B includes a plurality of partition plates 65B like the dust collecting unit 50, but as shown in FIG. 9, the plurality of partition plates 65B are tubular bodies in the dust collecting unit 50B. A space extending to the outside of the collection pocket 51 along the inner wall surface of the outer corner portion 50f of the TB, and the plurality of partition plates 65B extending from the inside of the collection pocket 51 to the vicinity of the intake port 50a. Is divided into multiple small spaces.
  • the plurality of partition plates 65B according to the present modification 2 make it possible to obtain the same effect as the effect of the above-described embodiment, and in addition, the rectifying action in the dust collecting unit 50B is performed in the above-mentioned modification 1. It is possible to further improve the dust collecting unit 50A according to the above and further increase the dust recovery rate.
  • the plurality of partition plates 65A and 65B according to the first modification and the second modification increase the pressure loss by extending to the outside of the collection pocket 51, but there is a trade-off between the pressure loss and the dust recovery rate. It is possible to determine the shape, arrangement form, etc. of the partition plate 65 in consideration of the off.
  • FIG. 10 shows a cross section of the dust collecting unit 50C and the intake chamber 15b according to the third modification.
  • the same components as those included in the above-described embodiment shown in FIG. 2 are designated by the same reference numerals.
  • the dust collecting unit 50C according to the third modification is different from the dust collecting unit 50 according to the above-described embodiment only in the following points. That is, the dust collecting unit 50C further includes an auxiliary fan 61 shown in FIG. 10 in addition to the cooling fan 33 shown in FIG.
  • the auxiliary fan 61 is a fan smaller than the cooling fan 33 shown in FIG. 2, and collects outside air sucked through the intake port 50a of the tubular body TB in the dust collecting unit 50C into the inside of the collecting pocket 51. It is arranged to suck further.
  • the auxiliary fan 61 suppresses the dust once collected in the collection pocket 51 from being scattered out of the collection pocket 51 again.
  • the auxiliary fan 61 is arranged as shown in FIG. 10, for example. That is, it is preferable that an opening 62 leading to the outside is provided at the bottom of the collection pocket 51, and the auxiliary fan 61 is arranged at or near the opening 62. This makes it possible for the dust to be discharged to the outside as it is together with the air sucked into the collection pocket 51, thereby saving the trouble of discarding the dust collected in the collection pocket 51. to enable.
  • the opening 62 is preferably provided, for example, in a portion of the outer wall portion 53 of the tubular body TB in the vicinity of the connection port 50b.
  • FIG. 11 shows a cross section of the dust collecting unit 50D and the intake chamber 15b according to the modified example 4.
  • the same components as those included in the above-described embodiment shown in FIG. 2 are designated by the same reference numerals.
  • the dust collecting unit 50D according to the present modification 4 is different from the dust collecting unit 50 according to the above-described embodiment only in the following points. That is, the dust collecting unit 50D further includes a return flow path 70 as shown in FIG.
  • the return flow path 70 extends along the inner wall surface of the outer corner portion 50f of the tubular body TB in the dust collection unit 50D, and communicates the inside of the collection pocket 51 with the space in the vicinity of the intake port 50a.
  • the air in the collection pocket 51 is allowed to return to the vicinity of the intake port 50a through the return flow path 70, and the pressure in the collection pocket 51 is reduced.
  • a passage wall 71 as shown in FIG. 11 is provided inside the tubular body TB.
  • the passage wall 71 is provided from the inside of the collection pocket 51 to the vicinity of the intake port 50a along the inner wall surface of the outer corner with a space between the inner wall surface of the outer corner portion 50f, that is, the inner wall surface of the outer corner. It extends all the way to, thereby partitioning the space inside the tubular body TB into the return passage 70 near the inner wall surface of the outer corner and the intake passage 50d inside the return passage 70.
  • the ends located in the collection pocket 51 define the inlet 72 of the return flow path 70, and the end near the intake port 50a is the outlet of the return flow path 70. 73 is defined.
  • the return flow path 70 makes it possible to further improve the dust recovery efficiency by reducing the pressure in the collection pocket 51. Specifically, if the pressure in the collection pocket 51 rises without being reduced, (1) it becomes difficult for dust to enter the collection pocket 51, and (2) dust once collected in the collection pocket 51 May be pushed out of the collection pocket 51 by the wind pressure in the collection pocket 51, but the return flow path 70 for reducing the pressure in the collection pocket 51 as described above is described in (1). ) And (2) can be suppressed from occurring.
  • the pressure in the tubular body TB becomes lower as it approaches the intake port 50a, it is located near the inlet 72 of the return flow path 70 located inside the collection pocket 51 and the intake port 50a.
  • the pressure difference between the outlet 73 of the return flow path 70 and the outlet 73 is large. This makes it possible to effectively reduce the pressure in the collection pocket 51.
  • the opening surface of the outlet 73 is preferably perpendicular to or substantially perpendicular to the opening surface of the intake port 50a. This prevents the flow of air discharged from the outlet 73 from obstructing the flow of outside air taken in through the intake port 50a, thereby suppressing a decrease in intake efficiency.
  • the position of the outlet 73 is not limited to the vicinity of the intake port 50a.
  • the outlet 73 can be provided at an arbitrary position in the dust collection unit 50 outside the collection pocket 51 and in a region where the pressure is lower than the inside of the collection pocket 51.
  • the return passage 70 is not limited to the one defined by the inner wall surface of the outer corner portion 50f and the passage wall 71.
  • the return flow path 70 can be configured by a tube or the like arranged so as to extend from the inside to the outside of the collection pocket 51 in the tubular body TB.
  • FIG. 12 shows a cross section of the dust collecting unit 50E and the intake chamber 15b according to the modified example 5.
  • the same components as those included in the above-described embodiment shown in FIG. 2 are designated by the same reference numerals.
  • the feature of the dust collecting unit 50E according to the present modification 5 is that at least the upstream side portion of the tubular body TB in the dust collecting unit 50, that is, the portion from the intake port 50a to the bent portion 50c. , Is smaller than the area of the rotating surface of the cooling fan 33 shown in FIG.
  • the rotating surface is a circular surface corresponding to the rotation loci of a plurality of blades constituting the cooling fan 33 when the cooling fan 33 is viewed from the rotation axis direction of the cooling fan 33.
  • the tubular body TB having the cross-sectional area as described above can increase the flow velocity of the air sucked through the intake port 50a, whereby more dust can be collected from the bent portion 50c of the dust collecting unit 50E. It is possible to collide with the inner wall surface of the outer corner portion 50f of the. As a result, more dust can be collected in the collection pocket 51.
  • the cross-sectional area of the downstream portion from the bent portion 50c to the connection port 50b is the area of the rotating surface of the cooling fan 33. It is preferable that it is smaller than and larger than the cross-sectional area of the portion from the intake port 50a to the bent portion 50c, that is, the upstream side portion. This further increases the flow velocity of the air sucked through the intake port 50a, allowing more dust to collide with the inner wall surface of the outer corner portion 50f of the bent portion 50c, thereby allowing more dust to collide with the inner wall surface of the outer corner portion 50f of the bent portion 50c. Allows more dust to be collected in the collection pocket 51.
  • the present invention also includes the following forms.
  • the construction machine 10 includes an attachment 13 including a bucket 13c, but the present invention is not limited to the construction machine 10, and the outside air taken into the engine chamber and the engine chamber is not limited to the construction machine 10. It can be applied to construction machinery with heat exchangers arranged to pass through.
  • the present invention can be applied to a construction machine having an attachment other than the attachment including a bucket.
  • the airflow suppressing member according to the present invention that is, the member that suppresses the formation of airflow in the collecting space defined by the collecting pocket is not limited to the plurality of partition plates 65.
  • the shape, number of arrangements, arrangement orientation, arrangement interval, etc. of the airflow suppression member depend on the size of the collection pocket defining the collection space, the speed of the outside air flowing in through the intake port, the particle size of the dust contained in the outside air, and the like. Can be set as appropriate.
  • at least one rod-shaped member or the like may be arranged in the collection space.
  • the at least one partition plate may include a partition plate in which a bend, a hole, or the like is formed.
  • a bend that enhances the effect of suppressing the formation of airflow in the collection space defined by the collection pocket.
  • a hole in the partition plate so as to prevent centralized accumulation and overflow of dust in a specific area in the collection pocket.
  • the partition plate may be a punched plate.
  • the position of the upper end of the partition plate may be lower than the position of the upper end of the collection pocket or the dust collection case, or a gap may be provided between the lower end of the partition plate 65 and the bottom of the collection pocket 51 or the dust collection case 57. The same effect as described above can be obtained by doing so.
  • the inner wall surface of the outer corner portion 50f of the bent portion 50c of the dust collecting unit 50 according to the above-described embodiment has an arcuate cross section, but the specific shape of the inner wall surface is not limited.
  • a baffle plate 80 that covers the corner portion from the inside is provided. By doing so, it is possible to suppress the generation of a vortex in the bent portion 50c and prevent the vortex from lowering the intake efficiency.
  • FIG. 13 the same components as those included in the above-described embodiment shown in FIG. 2 are designated by the same reference numerals.
  • the dust collecting unit 50 is connected to the upper surface of the intake chamber 15b, but in the present invention, the location where the dust collecting unit is connected to the intake chamber is not particularly limited.
  • the dust collecting unit 50G according to the modified example 7 shown in FIG. 14 is connected to the left side surface of the intake chamber 15b.
  • an opening 16a is provided in a portion of the machine room cover 16 that constitutes the left side wall of the intake chamber 15b, and the connection port 50b of the dust collecting unit 50G passes through the opening 16a.
  • the dust collecting unit 50G is attached to the machine room cover 16. In the example shown in FIG.
  • a posture in which the downstream portion of the tubular body TB of the dust collecting unit 50G from the bent portion 50c to the connection port 50b is perpendicular to or substantially perpendicular to the left side surface of the intake chamber 15b. That is, it is connected to the intake chamber 15b in a substantially horizontal posture, and the upstream portion from the intake port 50a to the bent portion 50c in the dust collecting unit 50G is parallel to or substantially equal to the left side surface of the intake chamber 15b. It is in a parallel position, that is, a substantially vertical position. Also in this dust collecting unit 50G, the collecting pocket 51 is located on the downstream side (right side in FIG.
  • the dust collecting case 57 shown in FIGS. 5 to 7 is not essential. Instead, for example, the dust may be collected directly into the collection pocket 51 without going through the dust collection case 57, and the dust may be pulled out from the collection pocket 51 as it is, or the collection pocket may be used as it is. 51 may be configured to be detachable from the tubular body TB.
  • the collection pocket 51 is provided inside the tubular body TB of the dust collection unit 50, but the collection pocket is arranged in the outer corner portion of the bent portion of the tubular body. It can be arbitrarily set within the range on the downstream side of the wall surface.
  • the collection pocket may be arranged outside the tubular body, or may be arranged at a position in the intake chamber near the connection port of the dust collection unit.
  • the tubular body TB according to the above-described embodiment is arranged outside the intake chamber 15b, but instead, the tubular body may be arranged inside the intake chamber.
  • the tubular body in the dust collecting unit 50H according to the modified example 8 shown in FIG. 15, the tubular body has the intake port 50a of the tubular body TB facing horizontally and the connection port 50b facing downward in the intake chamber 15b.
  • the entire TB is arranged inside the intake chamber 15b.
  • the entire tubular body TB faces the intake air so that the intake port 50a faces upward and the connection port 50b faces the horizontal direction in the intake chamber 15b. It is arranged inside the chamber 15b.
  • the dust collected in the respective collection pockets 51 of the dust collection units 50H and 50I can be collected, for example, through the maintenance opening 23 opened and closed by the rear cover 24 shown in FIG.
  • FIGS. 15 and 16 the same components as those included in the above-described embodiment shown in FIG. 2 are designated by the same reference numerals.
  • a construction machine which is arranged in an engine chamber, an engine arranged in the engine chamber, and air outside the engine chamber arranged in the engine chamber into the engine chamber.
  • the cooling fan for suction, the heat exchanger arranged in the engine chamber so that the air sucked into the engine chamber by the cooling fan passes, and the heat exchanger on the upstream side of the heat exchanger in the flow direction of the air.
  • It includes an intake chamber that is arranged independently of the engine chamber and a dust collecting unit that is connected to the intake chamber.
  • the dust collecting unit includes a tubular body, a collecting pocket, and an air flow suppressing member.
  • the tubular body has both ends and bent portions located between the both ends.
  • Both ends form an intake port that opens to the outside of the intake chamber and a connection port that opens into the intake chamber at a position opposite to the intake port.
  • the tubular body has a shape that bends at the bent portion.
  • the collection pocket is located on the downstream side of the inner wall surface of the tubular body constituting the outer corner portion of the bent portion in the intake direction, which is the direction of the air flow from the intake port to the connection port.
  • a collection space that opens toward the outer corner portion is defined so as to collect dust separated from the air at the outer corner portion.
  • the airflow suppressing member is arranged in the collecting space so as to suppress the formation of the airflow in the collecting space.
  • the heat exchanger and the like are relatively large in size that cause clogging.
  • Part or all of the large-diameter dust is separated from the outside air on the inner wall surface of the outer corner portion of the bent portion by utilizing the inertia of the large-diameter dust, and is placed in the collection pocket on the downstream side of the inner wall surface. Can be recovered.
  • a part or all of the large-diameter dust cannot sufficiently change direction at the bent portion, and the outer corner of the bent portion cannot be sufficiently changed.
  • the airflow suppressing member arranged in the collecting pocket suppresses the formation of the airflow in the collecting space in the collecting pocket, so that the outside air flowing into the collecting pocket is a large vortex. It is possible to prevent the dust once collected in the collection pocket from flowing out from the collection pocket due to the vortex.
  • the airflow suppressing member preferably includes at least one partition plate, and the partition plate is arranged parallel to or substantially parallel to the inflow direction in which the outside air flows into the collection pocket through the intake port.
  • the collection space in the collection pocket is divided into a plurality of spaces.
  • the at least one partition plate can prevent the formation of an air flow that forms a large vortex and flows backward in the collection space, and can limit the formation region of the air flow in the small space partitioned by the partition plate. .. That is, it is possible to prevent the formation of a large air flow that causes the dust once collected in the collection pocket to flow out of the collection pocket again.
  • the at least one partition plate includes a partition plate connected to the bottom portion in a posture perpendicular to or substantially perpendicular to the bottom portion of the collection pocket.
  • the partition plate connected to the bottom in this way does not easily hinder the collection of dust into the collection space.
  • the at least one partition plate may also include a partition plate extending from the inside of the collection pocket to the outside of the collection pocket along the inner wall surface of the outer corner portion of the bent portion.
  • the partition plate extending in this way can improve the rectifying action in the cylindrical body and increase the dust recovery rate.
  • the partition plate extending to the outside of the collection pocket as described above divides the space inside the cylinder from the collection pocket to the vicinity of the intake port into a plurality of regions, rectification inside the cylinder. The action can be further improved and the dust recovery rate can be further increased.
  • the inner wall surface of the outer corner portion is, for example, an arc shape.
  • Such an arc-shaped inner peripheral surface can suppress the generation of a vortex in the vicinity of the inner wall surface and prevent the vortex from lowering the intake efficiency.
  • the inner wall surface of the outer corner portion may have a corner portion.
  • the dust collecting unit further includes a baffle plate arranged in the bent portion so as to cover the corner portion from the inside, so that the dust collecting unit is inside the outer corner portion regardless of the presence of the corner portion. It is possible to suppress the generation of a vortex in the vicinity of the wall surface, thereby suppressing the vortex from lowering the intake efficiency.
  • the tubular body is preferably bent to a right angle at the bent portion. "Up to a right angle” does not require that the bending angle at the bent portion exactly matches 90 °, and even if it deviates slightly from 90 ° due to manufacturing / mounting errors, etc., it is substantially “90". Widely includes what can be regarded as "°".
  • the tubular body that is bent to a right angle at the bent portion in this way can sufficiently separate the dust by utilizing the inertia of the dust. Further, the tubular body can suppress the occurrence of pressure loss at the time of inspiration as compared with the tubular body having an acute angle of bending at the bent portion.
  • the bending angle of the dust collecting unit at the bent portion is preferably in the range of 85 ° or more and 95 ° or less, more preferably in the range of 87.5 ° or more and 92.5 °, and further preferably in the range of 87.5 ° or more and 92.5 °. It is preferable to set it in the range of 89 ° or more and 91 ° or less.
  • the dust collecting unit is a fan different from the cooling fan, and is an auxiliary fan arranged so as to further suck the outside air flowing into the tubular body through the intake port into the collecting space of the collecting pocket. Further inclusion is preferred.
  • the auxiliary fan can suppress the dust collected in the collection space from scattering outside the collection space.
  • the collection pocket is provided with an opening that communicates the inside and the outside of the collection pocket, and the auxiliary fan is arranged in or near the opening.
  • the auxiliary fan arranged in this way can be sucked into the collection space of the collection pocket by the auxiliary fan, and dust can be discharged to the outside through the opening together with air. This makes it possible to save the trouble of disposing of the dust collected in the collection pocket.
  • the dust collecting unit further includes a return flow path that reduces the pressure in the collecting pocket by communicating the inside of the collecting pocket and the outside of the collecting pocket with each other.
  • the return flow path can suppress a decrease in dust recovery efficiency due to an increase in pressure in the collection pocket.
  • the return flow path is (1) that the increase in pressure in the collection pocket prevents dust from entering the collection pocket, and (2) once it is collected in the collection pocket. Prevents dust from being pushed out of the collection pocket by wind pressure.
  • the return flow path preferably extends along the inner wall surface of the outer corner portion and communicates with each other between the inside of the collection pocket and the space in the vicinity of the intake port. Since the pressure in the tubular body becomes lower as it approaches the intake port, the inlet (that is, the capture) of the return flow path that communicates with each other between the inside of the collection pocket and the space in the vicinity of the intake port as described above. A large pressure difference is created between the inside of the collection pocket) and the outlet (that is, near the intake port), and the pressure difference makes it possible to effectively reduce the pressure in the collection pocket.
  • the outlet in the return flow path in the vicinity of the intake port is opened in a direction perpendicular to or substantially perpendicular to the opening surface of the intake port. This prevents the flow of air discharged from the outlet near the intake port in the return flow path from obstructing the flow of outside air flowing into the cylindrical body through the intake port, thereby reducing the intake efficiency. Can be suppressed.
  • the portion of the cylindrical body from the intake port to the bent portion has elasticity smaller than the area of the rotating surface of the cooling fan. This increases the flow velocity of the air flowing into the tubular body through the intake port, allowing more dust to collide with the inner wall surface of the outer corner portion of the bend, thereby making it more. Allows a large amount of dust to be collected in the collection pocket.
  • the portion of the tubular body from the bent portion to the connecting port is smaller than the area of the rotating surface of the cooling fan, and is larger than the cross-sectional area of the portion from the intake port to the bent portion. It is preferable to have a large cross-sectional area. This further increases the flow velocity of the air flowing into the tubular body through the air intake port, allowing more dust to collide with the inner wall surface of the outer corner portion, thereby allowing more dust. Allows to be collected in the collection pocket.
  • the portion of the tubular body in the vicinity of the intake port has an inviting shape having a cross-sectional area that becomes smaller as the distance from the intake port increases.
  • the invitation shape can suppress the occurrence of pressure loss during inspiration.
  • the collection pocket is configured so that the dust collected in the collection pocket can be taken out of the collection pocket. This can prevent the amount of dust collected in the collection pocket from increasing and the dust from easily jumping out of the collection pocket.
  • the collection space is defined by an outer wall portion of the cylindrical body and a partition wall.
  • the outer wall portion is located on the downstream side of the outer corner portion of the wall portion constituting the downstream side portion from the bent portion to the connection port in the cylindrical body, and the partition wall is the partition wall. It is arranged in the tubular body so as to partition the space in the tubular body into an outer space facing the outer wall portion and an inner space on the opposite side thereof.
  • the outer wall portion and the partition wall can form the collection pocket with a simple structure.
  • the dust collecting unit further includes a dust collecting case arranged in the collecting pocket and accommodating dust collected in the collecting pocket, and the outer wall portion includes the dust collecting case.
  • a dust collecting case arranged in the collecting pocket and accommodating dust collected in the collecting pocket
  • the outer wall portion includes the dust collecting case.
  • At least the end portion of the partition wall on the side close to the bent portion may be inclined corresponding to the bent portion. This widens the entrance of the collection pocket, thereby making it easier for dust that collides with and bounces off the inner wall surface of the outer corner portion of the bent portion to enter the collection pocket.
  • the inner wall surface on the side closer to the intake port is more than the end of the connection port on the side closer to the intake port. It is preferable that the inner wall surface of the downstream side portion is closer to the inner wall surface on the side closer to the outer corner portion.
  • the tubular body is arranged outside the intake chamber and connected to the intake chamber.
  • the tubular body can be easily installed.
  • the portion of the cylindrical body from the bent portion to the connection port is connected to the upper surface in a posture perpendicular to or substantially perpendicular to the upper surface of the intake chamber.
  • the cylindrical body arranged in this way enables dust after colliding with the inner wall surface of the outer corner portion of the bent portion to be efficiently collected in the collection pocket by the gravity acting on the dust. do.
  • the construction machine is arranged in the intake chamber and surrounds the space on the upstream side of the heat exchanger in the air flow direction in the intake chamber so as to seal the space, and the duct so as to close the intake port of the duct. It is preferable to further include a dustproof filter mounted on the.
  • the dust filter can capture the large-diameter dust that causes clogging in the heat exchanger or the like and is not collected in the collection pocket and remove it from the air.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

La présente invention concerne un engin de chantier apte à supprimer une diminution de l'efficacité de travail due au nettoyage d'un filtre à poussière. L'engin de chantier est équipé d'une chambre de moteur (15a), d'une chambre d'admission d'air (15b) et d'une unité de capture de poussière (50) reliée à la chambre d'admission d'air (15b). L'unité de capture de poussière (50) comprend un corps tubulaire (TB), une poche de capture (51) et un élément de suppression d'écoulement d'air. Le corps tubulaire (TB) a des sections d'extrémité sur ses deux côtés qui forment respectivement un orifice d'admission d'air (50a) et un orifice de connexion (50b), a une section incurvée (50c) entre celles-ci et est façonné de façon à incurver au niveau de ladite section incurvée (50c). La poche de capture (51) est positionnée sur le côté aval de la surface de paroi interne d'une section coin externe (50f) de la section incurvée (50c) et délimite l'espace de capture où la poussière séparée de l'air extérieur est capturée. L'élément de suppression d'écoulement d'air supprime la formation d'écoulement d'air et est positionné à l'intérieur de l'espace de capture.
PCT/JP2021/012032 2020-04-16 2021-03-23 Engin de chantier WO2021210361A1 (fr)

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JP2020-073328 2020-04-16
JP2020073328A JP7104093B2 (ja) 2020-04-16 2020-04-16 建設機械

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JP2023088019A (ja) * 2021-12-14 2023-06-26 国立大学法人広島大学 建設機械の集塵機構及びこれを備えた建設機械

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0546528U (ja) * 1991-11-29 1993-06-22 住友建機株式会社 建設機械の吸気ダクト装置
JPH09150636A (ja) * 1995-11-29 1997-06-10 Sumitomo Constr Mach Co Ltd エンジンの冷却風吸入ダクト
JP2014144678A (ja) * 2013-01-28 2014-08-14 Hitachi Constr Mach Co Ltd 作業機械
JP2017007579A (ja) * 2015-06-24 2017-01-12 株式会社神戸製鋼所 建設機械の吸気構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0546528U (ja) * 1991-11-29 1993-06-22 住友建機株式会社 建設機械の吸気ダクト装置
JPH09150636A (ja) * 1995-11-29 1997-06-10 Sumitomo Constr Mach Co Ltd エンジンの冷却風吸入ダクト
JP2014144678A (ja) * 2013-01-28 2014-08-14 Hitachi Constr Mach Co Ltd 作業機械
JP2017007579A (ja) * 2015-06-24 2017-01-12 株式会社神戸製鋼所 建設機械の吸気構造

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