WO2014184977A1 - 作業車両 - Google Patents
作業車両 Download PDFInfo
- Publication number
- WO2014184977A1 WO2014184977A1 PCT/JP2013/081374 JP2013081374W WO2014184977A1 WO 2014184977 A1 WO2014184977 A1 WO 2014184977A1 JP 2013081374 W JP2013081374 W JP 2013081374W WO 2014184977 A1 WO2014184977 A1 WO 2014184977A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wall portion
- engine
- opening
- cooling chamber
- chamber
- Prior art date
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Classifications
-
- 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
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
- E02F3/764—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a vertical axis
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
- E02F3/7645—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a horizontal axis disposed parallel to the blade
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
- E02F3/765—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a horizontal axis disposed perpendicular to the blade
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
- E02F3/7654—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being horizontally movable into a position near the chassis
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
-
- 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
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0891—Lids or bonnets or doors or details thereof
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
- B60Y2200/411—Bulldozers, Graders
Definitions
- the present invention relates to a work vehicle, and particularly to a work vehicle equipped with an engine.
- a work vehicle such as a motor grader includes an engine, a heat exchanger used for cooling the engine, and a blower that supplies cooling air to the heat exchanger.
- a space in an exterior cover is partitioned by a partition plate into an engine room that houses an engine and a heat exchanger room that houses a cooling fan.
- the structure which sucks out the air in an engine room and discharges it outside by the discharge hose provided over the heat exchanger room is disclosed.
- the present invention has been made in view of the above problems, and an object of the present invention is to provide a work vehicle that can cool the engine compartment with a simple structure.
- the work vehicle includes a work machine, an engine, a blower, an exterior cover, and a partition wall.
- the exterior cover covers the engine and the blower.
- the partition partitions the internal space of the exterior cover into an engine chamber that houses the engine and a cooling chamber that houses the blower.
- the partition wall has a first wall portion having a first inclination angle with respect to the extending direction of the upper surface plate of the exterior cover located closer to the cooling chamber than the partition wall, and a second inclination angle with respect to the extending direction of the upper surface plate. And a second wall portion.
- the first tilt angle is larger than the second tilt angle.
- An intake hole that connects the external space and the internal space of the exterior cover is formed at a position of the top plate facing the second wall portion.
- An opening that connects the engine chamber and the cooling chamber is formed in the first wall portion.
- the pressure difference between the engine chamber and the cooling chamber is generated due to the flow of air generated in the cooling chamber, and the air in the engine chamber flows to the cooling chamber via the opening.
- the work vehicle includes a cooling unit disposed on the partition side with respect to the blower in the cooling chamber.
- the lower side of the second wall portion is inclined toward the cooling unit.
- the second wall portion is located on the cooling chamber side of the opening. Therefore, since rainwater or a foreign material can be prevented from entering the engine compartment, each device in the engine compartment can be more reliably protected.
- the angle formed by the first wall portion and the second wall portion is 20 ° or less.
- the height at which the second wall portion protrudes toward the cooling chamber with respect to the first wall portion is reduced, whereby the flow velocity of the air flowing along the first wall portion can be increased, and the engine chamber Since the ability to suck out air from the engine can be further improved, the engine compartment can be cooled more efficiently.
- the first wall portion includes an edge portion where the partition wall is connected to the upper surface plate.
- the first wall portion can be disposed closer to the intake hole, whereby the flow velocity of the air flowing along the first wall portion can be increased, and the ability to suck out air from the engine compartment can be further improved. Therefore, the engine compartment can be cooled more efficiently.
- the work vehicle includes a cooling unit disposed on the partition side with respect to the blower in the cooling chamber.
- the lower side of the first wall portion is inclined toward the cooling unit side. In this way, the flow rate of the air flowing into the cooling chamber can be increased. Therefore, the cooling capacity of various devices constituting the work vehicle can be further improved.
- the cooling efficiency in the engine compartment can be further improved.
- the work vehicle further includes a post-processing device that processes exhaust gas discharged from the engine.
- the post-processing device is arranged in a position closer to the opening than the engine in the engine compartment. In this way, since the post-processing apparatus is disposed in the vicinity of the opening, the post-processing apparatus can be efficiently air-cooled by forming an air flow around the post-processing apparatus. Therefore, overheating of the aftertreatment device can be prevented more reliably.
- the engine room can be cooled by ventilating the engine room with a simple structure, so that overheating of the equipment in the engine room can be prevented.
- FIG. 1 is a perspective view schematically showing a configuration of a motor grader 1 according to an embodiment of the present invention.
- FIG. 2 is a side view schematically showing the configuration of the motor grader 1.
- the motor grader 1 of the present embodiment mainly includes traveling wheels 11, 12, a body frame 2, a cab 3, and a work implement 4.
- the motor grader 1 includes components such as an engine disposed in the engine room 6.
- the work machine 4 includes a blade 42.
- the motor grader 1 can perform operations such as leveling work, snow removal work, light cutting, and material mixing with the blade 42.
- the traveling wheels 11 and 12 include a front wheel 11 and a rear wheel 12.
- a traveling wheel including two front wheels 11 each having one wheel on each side and four rear wheels 12 having two wheels on each side is shown, but the number and arrangement of the front wheels and the rear wheels are shown here. Not limited.
- the front-rear direction means the front-rear direction of the motor grader 1. That is, the front-rear direction means the front-rear direction viewed from the driver seated on the driver's seat of the cab 3.
- the left-right direction or the side means the vehicle width direction of the motor grader 1. That is, the left-right direction, the vehicle width direction, or the side means the left-right direction viewed from the driver seated on the driver's seat of the cab 3.
- the front-rear direction is indicated by an arrow X
- the left-right direction is indicated by an arrow Y
- the up-down direction is indicated by an arrow Z in the figure.
- the vehicle body frame 2 includes a rear frame 21, a front frame 22, and an exterior cover 25.
- the rear frame 21 supports the exterior cover 25 and components such as an engine disposed in the engine compartment 6.
- the exterior cover 25 covers the engine chamber 6.
- the exterior cover 25 is formed with an upper opening 26, a side opening 27, and a rear opening described later.
- the upper opening 26, the side opening 27, and the rear opening are formed through the exterior cover 25 in the thickness direction.
- each of the four rear wheels 12 described above is attached to the rear frame 21 so as to be rotationally driven by a driving force from the engine.
- the front frame 22 is attached in front of the rear frame 21.
- the two front wheels 11 described above are rotatably attached to the front end portion of the front frame 22.
- the cab 3 is placed on the front frame 22. Inside the cab 3, there are provided operating sections (not shown) such as a handle, a speed change lever, an operating lever of the work machine 4, a brake, an accelerator pedal, an inching pedal, and the like.
- the cab 3 may be placed on the rear frame 21.
- the work machine 4 mainly has a draw bar 40, a circle 41, a blade 42, a hydraulic motor 49, and various hydraulic cylinders 44 to 48.
- the front end of the draw bar 40 is swingably attached to the front end of the front frame 22.
- the rear end portion of the draw bar 40 is supported on the front frame 22 by a pair of lift cylinders 44 and 45.
- the rear end portion of the draw bar 40 can be moved up and down with respect to the front frame 22 by the synchronized expansion and contraction of the pair of lift cylinders 44 and 45.
- the draw bar 40 can swing up and down around an axis along the vehicle traveling direction by different expansion and contraction of the lift cylinders 44 and 45.
- a drawbar shift cylinder 46 is attached to the front frame 22 and the side end of the drawbar 40.
- the draw bar 40 can move to the left and right with respect to the front frame 22 by the expansion and contraction of the draw bar shift cylinder 46.
- the circle 41 is rotatably attached to the rear end portion of the draw bar 40.
- the circle 41 can be driven to rotate clockwise or counterclockwise by the hydraulic motor 49 as viewed from above the vehicle with respect to the draw bar 40.
- the blade 42 is supported so as to be slidable in the left-right direction with respect to the circle 41 and swingable up and down around an axis parallel to the left-right direction.
- the blade shift cylinder 47 is attached to the circle 41 and the blade 42, and is disposed along the longitudinal direction of the blade 42. The blade shift cylinder 47 allows the blade 42 to move in the left-right direction with respect to the circle 41.
- a tilt cylinder 48 is attached to the circle 41 and the blade 42. By extending and retracting the tilt cylinder 48, the blade 42 can swing around the axis parallel to the left and right direction with respect to the circle 41 and change the direction in the vertical direction. Thereby, the tilt cylinder 48 can change the inclination angle with respect to the traveling direction of the blade 42.
- the blade 42 can move up and down with respect to the vehicle, change the inclination with respect to the traveling direction, change the inclination with respect to the lateral direction, rotate, and shift in the left-right direction via the draw bar 40 and the circle 41. It is configured.
- FIG. 3 is a partial cross-sectional view schematically showing the configuration of the engine chamber 6 and the cooling chamber 7.
- the exterior cover 25 is supported by the rear frame 21.
- the exterior cover 25 includes an upper surface plate 25a, a rear plate 25c, and a pair of side plates.
- the top plate 25a, the rear plate 25c, and the side plates have a plate shape.
- the space surrounded by the upper surface plate 25a, the rear plate 25c, and the side plates is formed hollow.
- An upper opening 26 is formed in the upper surface plate 25a.
- the upper opening 26 is formed so as to penetrate the upper surface plate 25a in the thickness direction, and communicates the internal space of the exterior cover 25 with the outside.
- a side opening 27 is formed in the side plate.
- the side opening 27 is formed so as to penetrate the side plate in the thickness direction, and communicates the internal space of the exterior cover 25 with the outside.
- a rear opening 28 is formed in the rear plate 25c.
- the rear opening 28 is formed so as to penetrate the rear plate 25c in the thickness direction, and communicates the internal space of the exterior cover 25 with the outside.
- the upper opening 26, the side opening 27, and the rear opening 28 connect the external space of the exterior cover 25 and the internal space of the exterior cover 25.
- the internal space of the exterior cover 25 is partitioned by a partition wall 60 in the front-rear direction.
- the space on the front side of the partition wall 60 is the engine chamber 6, and the space on the rear side of the partition wall 60 is the cooling chamber 7.
- the engine room 6 and the cooling room 7 constitute a machine room mounted on the motor grader 1.
- An engine 31 that generates a driving force for operating the motor grader 1 is accommodated in the engine chamber 6.
- the engine 31 is placed on the rear frame 21.
- a blower 51 is accommodated in the cooling chamber 7.
- the blower 51 is, for example, a propeller fan, and is supported by the rear frame 21 via a support structure (not shown).
- the partition wall 60 partitions the internal space of the exterior cover 25 into an engine chamber 6 that houses the engine 31 and a cooling chamber 7 that houses the blower 51.
- the upper surface plate 25a of the exterior cover 25 covers the engine 31 and the blower 51.
- the side plate of the exterior cover 25 covers the engine 31 and the blower 51.
- the engine 31 and the air blower 51 are covered with an outer cover 25 and are surrounded by the outer cover 25.
- post-processing devices 32 and 34 for treating and purifying exhaust gas discharged from the engine 31 are provided.
- the engine 31 and the aftertreatment device 34 are connected by a first exhaust pipe (not shown).
- the post-processing devices 32 and 34 are connected by a second exhaust pipe (not shown).
- the aftertreatment devices 32 and 34 are provided connected to the exhaust pipe of the engine 31. Exhaust gas discharged from the engine 31 passes through the aftertreatment devices 34 and 32 in order, and is discharged out of the motor grader 1.
- the post-processing device 34 is, for example, a diesel particulate filter device.
- the aftertreatment device 32 is, for example, a selective catalytic reduction type denitration device.
- An electronic device 33 is provided in the engine room 6 in the vicinity of the post-processing device 32.
- the electronic device 33 includes a sensor for detecting the temperature of the exhaust gas passing through the aftertreatment device 32 and the nitrogen oxide concentration and oxygen concentration in the exhaust gas.
- the electronic device 33 also includes a control device for injecting a reducing agent such as urea upstream of the post-processing device 32. Nitrogen oxides contained in the exhaust gas are reduced in the post-processing device 32, whereby the nitrogen oxides are chemically changed to harmless nitrogen gas, thereby reducing the nitrogen oxide concentration in the exhaust gas. it can.
- the post-processing devices 32 and 34 and the electronic device 33 are disposed in the engine chamber 6 at a position closer to the partition wall 60 than the engine 31.
- the center position C of the engine compartment 6 is shown.
- the center position C indicates the center position of the engine compartment 6 in the front-rear direction, the left-right direction, and the up-down direction.
- the post-processing devices 32 and 34 and the electronic device 33 are disposed at a position closer to the partition wall 60 than the center position C of the engine chamber 6.
- a cooling unit 52 is provided in the cooling chamber 7.
- the cooling unit 52 is disposed on the front side of the blower 51 in the cooling chamber 7.
- the cooling unit 52 is disposed in the cooling chamber 7 at a position closer to the partition wall 60 than the blower 51.
- the cooling unit 52 includes a radiator that cools the cooling water flowing to the engine 31, an intercooler that cools the air supplied to the engine 31, an oil cooler that cools the hydraulic fluid of the transmission, a condenser that condenses the air conditioning refrigerant, and the hydraulic cylinder 44.
- a hydraulic oil cooler for cooling the hydraulic oil for driving .about.48 is included.
- the blower 51 generates an air flow that passes through the cooling chamber 7.
- an air flow that flows from the front toward the rear through the blower 51 is generated.
- the upper opening 26 and the side opening 27 have a function as an intake hole for introducing air into the cooling chamber 7.
- the air that has flowed into the cooling chamber 7 flows out of the cooling chamber 7 via the rear opening 28.
- the rear opening 28 has a function as an exhaust hole for exhausting air from the cooling chamber 7.
- air passes through the cooling unit 52 and the blower 51 in order.
- the cooling water of the engine 31 is cooled by heat exchange between the air flowing through the cooling unit 52 and the cooling water of the engine 31.
- the blower 51 generates an air flow for cooling the engine 31.
- the partition wall 60 has a plate-like shape and is arranged to extend in the vertical direction from the upper surface plate 25 a of the exterior cover 25 to the rear frame 21.
- the partition wall 60 is disposed from the left side plate to the right side plate in the left-right direction.
- the partition wall 60 divides the engine chamber 6 and the cooling chamber 7, thereby suppressing noise generated by the engine 31 from leaking to the outside from the rear opening 28.
- the partition wall 60 further suppresses the air flowing in the cooling chamber 7 from being heated by the heat generated by the engine 31 by the operation of the blower 51, thereby keeping the temperature of the air in the cooling chamber 7 low and cooling the air.
- the heat exchange efficiency between the heat medium and air in the unit 52 is improved.
- the partition wall 60 has a flat plate-like upright wall portion 61 and a flat plate-like inclined wall portion 62.
- the upright wall 61 extends along the vertical direction indicated by the arrow Z in FIG.
- the inclined wall portion 62 inclines with respect to the vertical direction indicated by the arrow Z in FIG.
- the partition wall 60 has a bent shape as a whole in which the upright wall portion 61 and the inclined wall portion 62 are joined at the respective edge portions.
- the partition wall 60 has an upper edge portion 60 a connected to the upper surface plate 25 a of the exterior cover 25 and a lower edge portion 60 b connected to the rear frame 21.
- the upright wall portion 61 includes a lower edge portion 60 b of the partition wall 60.
- the inclined wall portion 62 includes an upper edge portion 60 a of the partition wall 60.
- the inclined wall portion 62 is inclined with respect to the vertical direction and the front-rear direction so as to go forward as it goes upward.
- the lower side of the inclined wall portion 62 is inclined toward the blower 51 and the cooling unit 52.
- the upper surface plate 25 a of the exterior cover 25 extends along the front-rear direction indicated by the arrow X.
- the inclined wall portion 62 is inclined with respect to the upper surface plate 25a of the outer cover 25 so as to face the engine chamber 6 side from the cooling chamber 7 side as approaching the upper edge portion 60a connected to the upper surface plate 25a. .
- An opening 64 is formed in the inclined wall portion 62.
- the opening 64 penetrates the flat inclined wall portion 62 constituting a part of the partition wall 60 in the thickness direction.
- the opening 64 connects the engine chamber 6 and the cooling chamber 7.
- the partition wall 60 further has an inclined wall portion 66.
- the inclined wall portion 66 has a portion that is inclined with respect to the vertical direction indicated by the arrow Z in FIG.
- the inclined wall portion 66 protrudes toward the cooling chamber 7 with respect to the inclined wall portion 62.
- the inclined wall portion 66 is disposed so as to be closer to the upper surface plate 25 a of the exterior cover 25 compared to the inclined wall portion 62.
- the inclined wall portion 66 is disposed so as to be closer to the air blowing device 51 as compared with the inclined wall portion 62.
- the inclined wall portion 66 is disposed so as to cover the opening 64 formed in the inclined wall portion 62 from the cooling chamber 7 side.
- the inclined wall portion 66 is located on the cooling chamber 7 side of the opening 64.
- the upper opening 26 of the upper surface plate 25a of the exterior cover 25 is formed at a position facing the inclined wall 66 when viewed in the vertical direction.
- FIG. 4 is a perspective view showing the configuration of the inclined wall portions 62 and 66 that constitute a part of the partition wall 60.
- FIG. 5 is a perspective view illustrating a configuration of a main part of the inclined wall portions 62 and 66. As shown in FIG. 4, the inclined wall portions 62 and 66 may be coupled to the inclined wall portion 62 using bolts, or may be integrally formed by welding or the like.
- the inclined wall portion 66 has a plate-like flat plate portion 67 and a pair of plate-like connecting portions 68.
- the flat plate portion 67 has a rectangular shape.
- the connecting portion 68 has a triangular shape.
- the flat plate portion 67 is inclined with respect to the inclined wall portion 62 so that one of the long sides of the rectangle is joined to the inclined wall portion 62 and is separated from the inclined wall portion 62 as it approaches the other of the long sides. .
- the rectangular short side of the flat plate portion 67 is joined to the connecting portion 68.
- the apex angle of the triangle of the connecting portion 68 is in contact with the joint portion between the flat plate portion 67 and the inclined wall portion 62.
- the base of the triangle of the connecting portion 68 corresponds to the distance between the other long side of the rectangular shape of the flat plate portion 67 and the inclined wall portion 62.
- the flat plate portion 67 is inclined with respect to the upper surface plate 25a so as to face the engine chamber 6 side from the cooling chamber 7 side as approaching the upper surface plate 25a of the exterior cover 25.
- the lower side of the flat plate portion 67 is inclined toward the blower 51 and the cooling unit 52.
- the long side that is not joined to the inclined wall portion 62 is disposed at a position away from the inclined wall portion 62.
- an opening 69 surrounded by the flat plate portion 67, the pair of connecting portions 68, and the inclined wall portion 62 is formed. Has been.
- the opening 69 communicates with the opening 64 penetrating the inclined wall portion 62.
- the engine chamber 6 and the cooling chamber 7 are in communication with each other through openings 64 and 69.
- the openings 64 and 69 contribute to communication between the engine chamber 6 and the cooling chamber 7.
- the inclined wall portion 66 is joined to the inclined wall portion 62 at the upper end, and the opening 69 is provided at the lower end of the inclined wall portion 66.
- the opening 69 opens toward the lower side of the cooling chamber 7.
- the opening 69 opens in a direction facing the blower 51 with respect to the inclined wall portion 66 in the vertical direction.
- FIG. 6 is a schematic diagram showing an inclination angle between the first wall portion 101 and the second wall portion 102.
- a straight line V extending in the left-right direction in FIG. 6 virtually indicates a direction in which the upper surface plate 25a of the exterior cover 25 extends.
- the inclined wall portions 62 and 66 when viewed from the side are shown in a simplified manner.
- the angle ⁇ indicates an angle formed by the straight line V and the inclined wall portion 62.
- the angle ⁇ indicates the angle of inclination of the inclined wall portion 62 with respect to the direction in which the upper surface plate 25a located on the cooling chamber 7 side with respect to the partition wall 60 extends.
- the angle ⁇ indicates an angle formed by the straight line V and the inclined wall portion 66 (that is, the flat plate portion 67 shown in FIGS. 4 and 5).
- the angle ⁇ indicates the angle of inclination of the inclined wall portion 66 with respect to the direction in which the upper surface plate 25a located on the cooling chamber 7 side with respect to the partition wall 60 extends.
- An angle ⁇ indicates an angle between the inclined wall portion 62 and the inclined wall portion 66 (flat plate portion 67).
- the position closer to the cooling chamber 7 than the partition wall 60 is a position closer to the cooling chamber 7 than the upper edge portion 60 a where the partition wall 60 is connected to the upper surface plate 25 a of the exterior cover 25.
- the angle ⁇ is larger than the angle ⁇ .
- the inclined wall portion 62 has a larger inclination with respect to the extending direction of the upper surface plate 25 a of the outer cover 25 than the inclined wall portion 66.
- the inclined wall portion 62 and the inclined wall portion 66 are arranged so that the angle ⁇ is 20 ° or less.
- the inclined walls 62 and 66 may be positioned so that the angle ⁇ is 17 °.
- the inclined wall portion 62 constitutes the first wall portion 101 having a relatively large inclination with respect to the extending direction of the upper surface plate 25a of the outer cover 25 located on the cooling chamber 7 side than the partition wall 60 in the first embodiment.
- the inclined wall portion 66 constitutes the second wall portion 102 having a relatively small inclination with respect to the extending direction of the upper surface plate 25a of the exterior cover 25 located on the cooling chamber 7 side than the partition wall 60 in the first embodiment.
- the relatively large first inclination angle is the angle ⁇
- the relatively small second inclination angle is the angle ⁇ .
- FIG. 7 is a schematic diagram showing the air flow inside the exterior cover 25. As described above, by driving the air blower 51 shown in FIG. Outside air flows into. In FIG. 7, the flow of outside air flowing into the cooling chamber 7 is indicated by white arrows. The air flowing into the cooling chamber 7 flows along the inclined wall portion 62. By operating the blower 51, an air flow along the inclined wall portion 62 as the first wall portion 101 is generated.
- the outside air that flows into the cooling chamber 7 via the upper opening 26 is the atmospheric temperature.
- the engine 31, the post-processing devices 32 and 34, and the electronic device 33 arranged in the engine chamber 6 are all heat generating devices that generate heat.
- the air in the engine compartment 6 is heated by these heat generating devices, and the temperature rises.
- the air flowing from the engine chamber 6 to the cooling chamber 7 through the openings 64 and 69 has a relatively high temperature as compared with the outside air that is the atmospheric temperature. That is, air that is hotter than the outside air that flows into the cooling chamber 7 through the upper opening 26 by the driving of the blower 51 flows from the engine chamber 6 into the cooling chamber 7 through the openings 64 and 69. It will be.
- the opening 64 of the inclined wall portion 62 is desirably formed relatively small with respect to the upper opening portion 26 formed in the upper surface plate 25a of the exterior cover 25.
- the opening 64 and the upper opening 26 may be formed so that the ratio of the opening area of the opening 64 to the opening area of the upper opening 26 is 1: 4.
- the opening 69 between the inclined wall portion 62 and the inclined wall portion 66 is preferably formed to be relatively small with respect to the opening 64 formed in the inclined wall portion 62.
- the openings 64 and 69 may be formed so that the ratio of the opening area of the opening 69 to the opening area of the opening 64 is 1: 4.
- the opening 64 and the opening 69 may be formed in a shape extending in the left-right direction.
- the opening 69 may have a slit shape extending in the left-right direction.
- FIG. 8 is a perspective view illustrating a configuration of a main part of the inclined wall portions 62 and 66 according to the second embodiment.
- the inclined wall portion 66 is configured to include the rectangular flat plate portion 67, but is not limited to this example.
- the inclined wall portion 66 may have a bent plate portion 67 a having a shape in which a rectangular plate is curved instead of the flat plate portion 67.
- the opening 69 is formed by arranging the edge of the bent plate portion 67a opposite to the edge joined to the inclined wall 62 at a position away from the inclined wall 62. Is formed.
- the engine chamber 6 and the cooling chamber 7 are communicated with each other through openings 64 and 69, and thereby, a configuration capable of generating a flow of air flowing from the engine chamber 6 to the cooling chamber 7 through the openings 64 and 69. It is said that.
- FIG. 9 is a cross-sectional view schematically showing the configuration of the partition wall 60 of the third embodiment. 9 schematically shows only a part of the upper surface plate 25a of the exterior cover 25 and a part of the partition wall 60 in the vicinity of the upper surface plate 25a.
- the partition wall 60 has an upright wall portion 61 and an inclined wall portion 62 joined at each edge portion, and further, the inclined wall portion 62 and the upright wall portion 63 joined at each edge portion so as to be bent twice. , As a whole.
- the upright wall portion 63 includes an upper edge portion 60 a of the partition wall 60.
- An opening 64 is formed in the upright wall portion 63.
- the opening 64 penetrates the flat upright wall portion 63 constituting a part of the partition wall 60 in the thickness direction.
- the opening 64 connects the engine chamber 6 and the cooling chamber 7.
- the inclined wall portion 66 has a portion extending along a direction inclined with respect to the vertical direction and the front-rear direction.
- the inclined wall portion 66 is located on the cooling chamber 7 side of the opening 64 formed in the upright wall portion 63 and is disposed so as to cover the opening 64 from the cooling chamber 7 side.
- the upper opening 26 of the upper surface plate 25a of the exterior cover 25 is formed at a position facing the inclined wall 66 when viewed in the vertical direction.
- 9 indicates an angle between the direction in which the upper surface plate 25a of the outer cover 25 on the cooling chamber 7 side of the partition wall 60 extends and the upright wall portion 63.
- 9 is an angle between the direction in which the upper surface plate 25a of the exterior cover 25 extends closer to the cooling chamber 7 than the partition wall 60 and the inclined wall portion 66 (the flat plate portion 67 shown in FIGS. 4 and 5).
- the angle ⁇ is a right angle and the angle ⁇ is an acute angle.
- the angle ⁇ is larger than the angle ⁇ .
- the upright wall portion 63 has a larger inclination with respect to the extending direction of the upper surface plate 25 a located on the cooling chamber 7 side than the partition wall 60 compared to the inclined wall portion 66.
- the upright wall portion 63 constitutes the first wall portion 101 having a relatively large inclination with respect to the extending direction of the upper surface plate 25a of the outer cover 25 located on the cooling chamber 7 side than the partition wall 60 in the third embodiment.
- the inclined wall portion 66 constitutes the second wall portion 102 having a relatively small inclination with respect to the extending direction of the upper surface plate 25a of the exterior cover 25 located on the cooling chamber 7 side with respect to the partition wall 60 in the third embodiment.
- An opening 64 that penetrates the partition wall 60 in the thickness direction is formed in the upright wall portion 63 as the first wall portion 101.
- the relatively large first inclination angle is the angle ⁇
- the relatively small second inclination angle is the angle ⁇ .
- FIG. 10 is a cross-sectional view schematically showing the configuration of the partition wall 60 of the fourth embodiment.
- FIG. 10 only a part of the upper surface plate 25a of the outer cover 25 and a part of the partition wall 60 in the vicinity of the upper surface plate 25a are schematically illustrated.
- the 10 includes a flat plate-like upright wall portion 61 and a flat plate-like inclined wall portion 62.
- the fourth embodiment shown in FIG. The upright wall 61 extends along the vertical direction.
- the inclined wall portion 62 extends along a direction inclined with respect to the vertical direction and the front-rear direction.
- the partition wall 60 has a bent shape as a whole in which the upright wall portion 61 and the inclined wall portion 62 are joined at the respective edge portions.
- the inclined wall portion 62 includes an upper edge portion 60 a of the partition wall 60.
- An opening 64 is formed in the upright wall portion 61.
- the opening 64 penetrates the flat upright wall portion 61 constituting a part of the partition wall 60 in the thickness direction.
- the opening 64 connects the engine chamber 6 and the cooling chamber 7.
- the opening 64 is formed through the upright wall 61 in the vicinity of the edge where the upright wall 61 joins the inclined wall 62.
- the upper opening 26 of the upper surface plate 25a of the exterior cover 25 is formed at a position facing the inclined wall portion 62 when viewed in the vertical direction.
- FIG. 10 indicates the angle between the direction in which the upper surface plate 25a of the exterior cover 25 on the cooling chamber 7 side of the partition wall 60 extends and the upright wall portion 61.
- An angle ⁇ in FIG. 9 indicates an angle between the direction in which the upper surface plate 25 a of the outer cover 25 on the cooling chamber 7 side of the partition wall 60 extends and the inclined wall portion 62.
- the angle ⁇ is a right angle and the angle ⁇ is an acute angle.
- the angle ⁇ is larger than the angle ⁇ .
- the upright wall portion 61 has a larger inclination with respect to the extending direction of the upper surface plate 25 a located on the cooling chamber 7 side than the partition wall 60 compared to the inclined wall portion 66.
- the upright wall 61 constitutes the first wall 101 having a relatively large inclination with respect to the extending direction of the upper surface plate 25a of the outer cover 25 located on the cooling chamber 7 side than the partition wall 60 in the fourth embodiment.
- the inclined wall portion 62 constitutes the second wall portion 102 having a relatively small inclination with respect to the extending direction of the upper surface plate 25a of the exterior cover 25 located on the cooling chamber 7 side than the partition wall 60 in the fourth embodiment.
- An opening 64 that penetrates the partition wall 60 in the thickness direction is formed in the upright wall portion 61 as the first wall portion 101.
- the relatively large first inclination angle is the angle ⁇
- the relatively small second inclination angle is the angle ⁇ .
- the partition wall 60 that partitions the engine chamber 6 and the cooling chamber 7 is an upper surface plate of the exterior cover 25 that is located closer to the cooling chamber 7 than the partition wall 60. It has the 1st wall part 101 whose inclination angle with respect to the extending direction of 25a is angle (alpha), and the 2nd wall part 102 whose inclination angle is angle (beta).
- the angle ⁇ is larger.
- An upper opening 26 that connects the external space and the internal space of the exterior cover 25 is formed in the upper surface plate 25 a of the exterior cover 25.
- the upper opening 26 is formed at a position facing the second wall 102 and at a position closer to the cooling chamber 7 than the upper edge 60a where the partition wall 60 is connected to the upper surface plate 25a.
- An opening 64 that connects the engine chamber 6 and the cooling chamber 7 is formed in the first wall portion 101.
- a cooling unit 52 disposed on the partition wall 60 side with respect to the blower 51 is provided in the cooling chamber 7.
- the second wall portion 102 is inclined with respect to the upper surface plate 25a so as to face the engine chamber 6 side from the cooling chamber 7 side as approaching the upper surface plate 25a.
- the second wall portion 102 is inclined at the lower side toward the cooling unit 52. Since the air flowing into the cooling chamber 7 from the upper opening 26 is guided by the second wall portion 102 and flows, the inflow of air from the opening 64 into the engine chamber 6 is suppressed.
- the inclined wall portion 66 constituting the second wall portion 102 is located on the cooling chamber 7 side of the opening 64. Since the second wall portion 102 that is inclined with respect to the upper surface plate 25a is located on the cooling chamber 7 side of the opening 64, exposure of the opening 64 to the upper opening portion 26 formed in the upper surface plate 25a is suppressed. ing. Thereby, even when rainwater or foreign matter flows into the cooling chamber 7 via the upper opening 26, it is possible to suppress the rainwater or foreign matter from entering the engine chamber 6. Therefore, each device in the engine compartment 6 can be more reliably protected.
- the angle formed by the first wall portion 101 and the second wall portion 102 is 20 ° or less.
- the angle ⁇ shown in FIG. 6 is 20 ° or less.
- the first wall portion 101 includes an upper edge portion 60 a in which the partition wall 60 is connected to the upper surface plate 25 a of the exterior cover 25. If it does in this way, the 1st wall part 101 can be arrange
- the first wall portion 101 has an upper surface plate so that the partition wall 60 is directed from the cooling chamber 7 side to the engine chamber 6 side as approaching the upper edge portion 60a connected to the upper surface plate 25a.
- the lower side of the first wall portion 101 is inclined to the cooling unit 52 side.
- the upper opening 26 formed in the upper surface plate 25a can be expanded forward in accordance with the inclination of the first wall 101, and the opening area of the upper opening 26 can be increased.
- the distance between the upper opening 26 and the cooling unit 52 in the front-rear direction can be increased by forming the upper opening 26 at a position further away from the blower 51.
- the direction in which the first wall portion 101 extends can be made closer to the flow direction of the air generated by the blower 51. That is, the angle of the flow direction of the air flowing along the first wall portion 101 with respect to the air flow direction generated by the blower 51 is reduced. Further, the first wall portion 101 is disposed outside the curve of the streamline of the air flow flowing into the cooling chamber 7 from the upper opening portion 26. Accordingly, the flow velocity of the air flowing along the first wall portion 101 can be further increased, and the ability to suck out air from the engine chamber 6 can be further improved, so that the cooling efficiency in the engine chamber 6 can be further improved.
- the motor grader 1 further includes a post-processing device 32 that processes exhaust gas discharged from the engine 31.
- the post-processing device 32 is disposed in the engine chamber 6 at a position closer to the opening 64 than the engine 31. In this way, since the post-processing device 32 that generates heat and becomes high temperature is disposed in the vicinity of the opening 64, the post-processing device 32 is efficiently made by forming an air flow around the post-processing device 32. Can be air-cooled. Therefore, overheating of the post-processing device 32 and the electronic device 33 in the vicinity of the post-processing device 32 can be more reliably prevented.
- the upper surface plate 25a of the exterior cover 25 is arranged extending in the front-rear direction indicated by the arrow X in the drawing, but the upper surface plate 25a may be disposed inclined with respect to the front-rear direction. Good. Even if the upper surface plate 25a is inclined, the partition wall 60 having the first wall portion 101 and the second wall portion 102 that are relatively different in inclination with respect to the extending direction of the upper surface plate 25a is provided. If the wall portion 101 is formed with an opening 64 that penetrates the partition wall 60 in the thickness direction, an effect of cooling the inside of the engine compartment 6 by generating an air flow through the opening 64 can be obtained similarly. it can.
- the second wall portion 102 is disposed at a position facing the upper opening portion 26 formed in the upper surface plate 25a of the outer cover 25, the present invention is not limited to this configuration. If the second wall portion 102 is disposed so as to face the opening of the exterior cover 25 that functions as an intake hole for introducing air into the cooling chamber 7, the second wall portion 102 has a different arrangement from the above embodiment. May be.
- the second wall 102 may be disposed so as to face the side opening 27 formed in the side plate of the exterior cover 25.
- the suction hole is formed in the floor plate of the cooling chamber 7, the second wall portion 102 may be disposed so as to face the suction hole.
- the partition wall 60 includes a first wall portion 101 having a relatively large inclination with respect to a direction in which one plate portion of the exterior cover 25 is positioned closer to the cooling chamber 6 than the partition wall 60 and a second wall having a relatively small inclination.
- Part 102 may be included.
- the opening 69 formed between the first wall portion 101 and the second wall portion 102 is open in a direction away from the air intake hole formed in the exterior cover 25.
- the second wall portion 102 is provided to face the side opening 27 formed on the right side plate of the exterior cover 25, it is desirable that the opening 69 is open toward the left side.
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- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
まず本発明の思想を適用可能な作業車両の一例として、モータグレーダの構成について説明するが、本発明はホイールローダ、ブルドーザなどの各種の作業車両に適用可能である。
図1は、本発明の一実施形態におけるモータグレーダ1の構成を概略的に示す斜視図である。図2は、モータグレーダ1の構成を概略的に示す側面図である。図1および図2を参照して、本実施形態のモータグレーダ1は、走行輪11,12と、車体フレーム2と、キャブ3と、作業機4とを主に備えている。また、モータグレーダ1は、エンジン室6に配置されたエンジンなどの構成部品を備えている。作業機4は、ブレード42を含んでいる。モータグレーダ1は、ブレード42で整地作業、除雪作業、軽切削、材料混合などの作業を行なうことができる。
図8は、第二実施形態の傾斜壁部62,66の要部の構成を示す斜視図である。図5に示す第一実施形態では、傾斜壁部66は、矩形状の平板部67を有して構成されていたが、この例に限られるものではない。傾斜壁部66は、図8に示すように、平板部67に替えて、矩形板が湾曲した形状の曲げ板部67aを有していてもよい。この構成であっても、傾斜壁部62と接合する側の縁部と反対側の曲げ板部67aの縁部が、傾斜壁部62から離れた位置に配置されていることにより、開口69が形成されている。エンジン室6と冷却室7とは開口64,69を介して連通されており、これにより、開口64,69を経由してエンジン室6から冷却室7へ流入する空気の流れを発生可能な構成とされている。
図9は、第三実施形態の隔壁60の構成を概略的に示す断面図である。なお図9には、外装カバー25の上面板25aの一部と、上面板25aの近傍の隔壁60の一部のみが、模式的に図示されている。
図10は、第四実施形態の隔壁60の構成を概略的に示す断面図である。なお図10には、外装カバー25の上面板25aの一部と、上面板25aの近傍の隔壁60の一部のみが、模式的に図示されている。
Claims (8)
- 作業機と、
エンジンと、
送風装置と、
前記エンジンおよび前記送風装置を覆う外装カバーと、
前記外装カバーの内部空間を、前記エンジンを収容するエンジン室、および前記送風装置を収容する冷却室に仕切る、隔壁とを備え、
前記隔壁は、前記隔壁よりも前記冷却室側に位置する前記外装カバーの上面板の延びる方向に対する傾斜が第1の傾斜角度を有する第一壁部と、前記上面板の延びる方向に対する傾斜が第2の傾斜角度を有する第二壁部とを有し、前記第1の傾斜角度は前記第2の傾斜角度よりも大きく、
前記上面板の、前記第二壁部に対向する位置に、前記外装カバーの外部空間と前記内部空間とを繋ぐ吸気孔が形成されており、
前記第一壁部に、前記エンジン室と前記冷却室とを繋ぐ開口が形成されている、作業車両。 - 前記冷却室内において前記送風装置に対し前記隔壁側に配置された冷却ユニットを備え、
前記第二壁部は、下側が前記冷却ユニット側に傾斜している、請求項1に記載の作業車両。 - 前記第二壁部は、前記開口の前記冷却室側に位置している、請求項1または2に記載の作業車両。
- 前記第一壁部と前記第二壁部とのなす角度は、20°以下である、請求項1~3のいずれか1項に記載の作業車両。
- 前記第一壁部は、前記隔壁が前記上面板に接続している縁部を含んでいる、請求項1~4のいずれか1項に記載の作業車両。
- 前記冷却室内において前記送風装置に対し前記隔壁側に配置された冷却ユニットを備え、
前記第一壁部は、下側が前記冷却ユニット側に傾斜している、請求項1~5のいずれか1項に記載の作業車両。 - 前記エンジンから排出される排気ガスを処理する後処理装置をさらに備え、
前記後処理装置は、前記エンジン室内において前記エンジンよりも前記開口に近い位置に配置されている、請求項1~6のいずれか1項に記載の作業車両。 - 前記送風装置の駆動によって、前記吸気孔を経由して前記冷却室内へ外気が流入し、前記外気よりも高温の空気が前記開口を経由して前記エンジン室から前記冷却室へ流れる、請求項1~7のいずれか1項に記載の作業車両。
Priority Applications (5)
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CN201380005421.7A CN104093949B (zh) | 2013-11-21 | 2013-11-21 | 作业车辆 |
DE112013000377.5T DE112013000377T5 (de) | 2013-11-21 | 2013-11-21 | Arbeitsfahrzeug |
US14/366,084 US9186981B2 (en) | 2013-11-21 | 2013-11-21 | Work vehicle |
JP2014502682A JP5612793B1 (ja) | 2013-11-21 | 2013-11-21 | 作業車両 |
PCT/JP2013/081374 WO2014184977A1 (ja) | 2013-11-21 | 2013-11-21 | 作業車両 |
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PCT/JP2013/081374 WO2014184977A1 (ja) | 2013-11-21 | 2013-11-21 | 作業車両 |
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US (1) | US9186981B2 (ja) |
JP (1) | JP5612793B1 (ja) |
CN (1) | CN104093949B (ja) |
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JP2015217829A (ja) * | 2014-05-19 | 2015-12-07 | 本田技研工業株式会社 | 車両の冷却構造 |
US9581071B2 (en) * | 2014-09-25 | 2017-02-28 | Hyster-Yale Group, Inc. | Cooling system for industrial vehicle |
JP6322151B2 (ja) * | 2015-03-12 | 2018-05-09 | 株式会社Kcm | 作業機械の冷却構造及び作業機械 |
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JP2004169518A (ja) * | 2002-11-22 | 2004-06-17 | Komatsu Ltd | 建設機械の冷却装置 |
JP2007283801A (ja) * | 2006-04-12 | 2007-11-01 | Hitachi Constr Mach Co Ltd | 建設機械 |
JP2011178178A (ja) * | 2008-06-30 | 2011-09-15 | Komatsu Ltd | 作業車両 |
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JPS578114U (ja) | 1980-06-17 | 1982-01-16 | ||
JPH02103819U (ja) * | 1989-02-03 | 1990-08-17 | ||
JPH07158111A (ja) | 1993-12-07 | 1995-06-20 | Hitachi Constr Mach Co Ltd | 油圧作業機のエンジン・ポンプルーム |
US20090249657A1 (en) * | 2006-05-11 | 2009-10-08 | Matthew Freeman | Detachable snow plow for passenger vehcile |
US7836967B2 (en) | 2008-07-28 | 2010-11-23 | Caterpillar Inc | Cooling system packaging arrangement for a machine |
JP5131410B2 (ja) * | 2010-08-03 | 2013-01-30 | トヨタ自動車株式会社 | 車両用冷却構造 |
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2013
- 2013-11-21 WO PCT/JP2013/081374 patent/WO2014184977A1/ja active Application Filing
- 2013-11-21 JP JP2014502682A patent/JP5612793B1/ja active Active
- 2013-11-21 CN CN201380005421.7A patent/CN104093949B/zh active Active
- 2013-11-21 DE DE112013000377.5T patent/DE112013000377T5/de not_active Withdrawn
- 2013-11-21 US US14/366,084 patent/US9186981B2/en active Active
Patent Citations (5)
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JPS56149022U (ja) * | 1980-04-08 | 1981-11-09 | ||
JPH0284721U (ja) * | 1988-12-20 | 1990-07-02 | ||
JP2004169518A (ja) * | 2002-11-22 | 2004-06-17 | Komatsu Ltd | 建設機械の冷却装置 |
JP2007283801A (ja) * | 2006-04-12 | 2007-11-01 | Hitachi Constr Mach Co Ltd | 建設機械 |
JP2011178178A (ja) * | 2008-06-30 | 2011-09-15 | Komatsu Ltd | 作業車両 |
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CN104093949B (zh) | 2015-08-19 |
JP5612793B1 (ja) | 2014-10-22 |
CN104093949A (zh) | 2014-10-08 |
DE112013000377T5 (de) | 2015-06-03 |
JPWO2014184977A1 (ja) | 2017-02-23 |
US9186981B2 (en) | 2015-11-17 |
US20150151628A1 (en) | 2015-06-04 |
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