WO2015064152A1 - ブルドーザ - Google Patents
ブルドーザ Download PDFInfo
- Publication number
- WO2015064152A1 WO2015064152A1 PCT/JP2014/067763 JP2014067763W WO2015064152A1 WO 2015064152 A1 WO2015064152 A1 WO 2015064152A1 JP 2014067763 W JP2014067763 W JP 2014067763W WO 2015064152 A1 WO2015064152 A1 WO 2015064152A1
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- WO
- WIPO (PCT)
- Prior art keywords
- treatment device
- exhaust treatment
- engine
- mount bracket
- connection pipe
- Prior art date
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Classifications
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- 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
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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
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
-
- 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
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
-
- 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
- E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
-
- 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
-
- 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
- E02F9/16—Cabins, platforms, or the like, for drivers
- E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
- F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
- F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
-
- 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
-
- 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
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
- E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
- F01N2340/04—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/18—Structure or shape of gas passages, pipes or tubes the axis of inlet or outlet tubes being other than the longitudinal axis of apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2470/00—Structure or shape of gas passages, pipes or tubes
- F01N2470/22—Inlet and outlet tubes being positioned on the same side of the apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
- F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/103—Oxidation catalysts for HC and CO only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the present invention relates to a bulldozer that is one of work vehicles.
- Patent Document 1 discloses a bulldozer in which the upper surface of the engine cover is inclined forward and downward (see Patent Document 1). In this bulldozer, the operator can visually recognize the upper part of the blade of the work machine, so that workability is improved.
- the exhaust treatment device refers to, for example, a diesel particulate filter (Diesel Particulate Filter: DPF) device, a selective reduction catalyst (Selective Catalytic Reduction: SCR) device, a diesel oxidation catalyst (Diesel Oxidation Catalyst: DOC) device, and the like.
- DPF diesel particulate filter
- SCR selective reduction catalyst
- DOC diesel oxidation catalyst
- Recent work vehicles are required to be equipped with at least two types of exhaust treatment devices of these exhaust treatment devices or at least two different types of exhaust treatment devices.
- the upper surface of the engine cover In the above-described bulldozer, in order to store at least two exhaust treatment devices in the engine compartment, when these devices are arranged at the top of the engine, the upper surface of the engine cover must be raised. When the upper surface of the engine cover is raised, the area of the upper part of the blade of the working machine that can be visually recognized by the operator is reduced, and workability is lowered.
- the width of the engine room is widened, and the side area of the blade of the working machine that can be visually recognized by the worker is narrowed. Therefore, even with such an arrangement, workability is reduced.
- An object of the present invention is to provide a bulldozer that suppresses deterioration in workability even when at least two exhaust treatment devices are housed in an engine room.
- the bulldozer according to the first aspect of the present invention includes a blade, an engine, a first exhaust treatment device, a second exhaust treatment device, and an engine cover.
- the first exhaust treatment device and the second exhaust treatment device process exhaust from the engine.
- the first exhaust treatment device is disposed in front of the engine and below the upper surface of the engine.
- the second exhaust treatment device is disposed above the engine.
- the engine cover has an upper surface that is inclined forward and downward.
- the engine cover covers the engine, the first exhaust treatment device, and the second exhaust treatment device.
- the longitudinal direction of the first exhaust treatment device and the second exhaust treatment device is along the vehicle width direction.
- the second exhaust treatment device has a portion that overlaps with the engine in a top view of the vehicle. In the vehicle side view, the front end of the second exhaust treatment device is located in front of the rear end of the first exhaust treatment device.
- the upper end of the relay connection pipe may be positioned below the upper end of the second exhaust treatment device.
- the front end of the second exhaust treatment device is preferably located behind the rear end of the relay connection pipe.
- the second exhaust treatment device may have a portion that overlaps the relay connection pipe.
- the second exhaust treatment device may be positioned ahead of the center position in the front-rear direction of the engine.
- the aforementioned bulldozer may further include an air cleaner disposed above the engine and below the upper surface of the engine cover.
- the air cleaner may be positioned behind the center position in the front-rear direction of the engine.
- the front end of the relay connection pipe is preferably located behind the front end of the first exhaust treatment device.
- the engine cover may further include a front surface along the first exhaust treatment device and the relay connection pipe, and a curved surface that smoothly connects the upper surface and the front surface.
- the outer diameter of the relay connection pipe is preferably shorter than the outer diameter of the first exhaust treatment device and the outer diameter of the second exhaust treatment device.
- the aforementioned bulldozer may further include a blade driving mechanism that drives the blade.
- a blade driving mechanism that drives the blade.
- the front surface of the engine cover may be positioned forward and below the rear end of the blade drive mechanism.
- the aforementioned bulldozer may further include a hydraulic pump disposed behind the engine.
- the aforementioned bulldozer may further include a cab disposed behind the engine and above the hydraulic pump.
- the angle formed between the straight line connecting the point represented by the central axis of the first exhaust treatment device and the point represented by the central axis of the relay connecting pipe and the vertical direction is in the range of 0 to 20 degrees. Good.
- the angle formed between the straight line connecting the point represented by the central axis of the relay connection pipe and the point represented by the central axis of the second exhaust treatment device and the vertical direction is in the range of 40 degrees to 70 degrees.
- the angle formed between the straight line connecting the point represented by the central axis of the first exhaust treatment device and the point represented by the central axis of the second exhaust treatment device and the vertical direction is in the range of 10 degrees to 40 degrees. Good.
- the aforementioned bulldozer may further include a mount bracket, a first support bracket, and a second support bracket.
- the mounting bracket may be attached to the engine.
- the first support bracket may be attached to the mount bracket and support the first exhaust treatment device.
- the second support bracket may be attached to the mount bracket and support the second exhaust treatment device.
- the mount bracket may have a lower mounting portion, an upper mounting portion, and a wall portion.
- a first support bracket may be attached to the lower attachment portion.
- a second support bracket may be attached to the upper attachment portion.
- the wall portion may extend in the vertical direction from the rear end portion of the lower attachment portion to the front end portion of the upper attachment portion.
- the mount bracket may have a first connection portion, a second connection portion, and a third connection portion.
- the first connection part may be connected to the lower part of the engine.
- the second connection part may be connected to the upper part of the engine.
- the third connection part may be connected to an intermediate part of the engine between the upper part and the lower part.
- the first exhaust treatment device is disposed in front of the engine, and the second exhaust treatment device is disposed above the engine.
- the longitudinal direction of the first exhaust treatment device and the second exhaust treatment device is along the vehicle width direction.
- the front end of the second exhaust treatment device is located behind the rear end of the first exhaust treatment device.
- FIG. 1 is a left side view of a bulldozer according to an embodiment of the present invention.
- FIG. 2 is a top view showing a part of the bulldozer according to one embodiment of the present invention.
- FIG. 3 is a left side view showing the internal configuration of the engine compartment.
- FIG. 4 is a right side view showing the internal configuration of the engine compartment.
- FIG. 5 is a front view showing the internal configuration of the engine compartment.
- FIG. 6 is a left side view showing the positional relationship among the blade drive mechanism, the exhaust processing assembly, and the engine cover when the blade is raised.
- FIG. 7 is a left side view of the mount bracket, the first support bracket, and the second support bracket.
- FIG. 8 is a front view of the mount bracket, the first support bracket, and the second support bracket.
- FIG. 2 is a top view showing a part of a bulldozer according to an embodiment of the present invention.
- FIG. 2 shows the engine chamber 8 in a state where an engine cover 13 described later is removed.
- the front-rear direction means the front-rear direction of the bulldozer 1.
- the front-rear direction means the front-rear direction viewed from an operator seated in the cab (cab) 12.
- the left-right direction means a left-right direction viewed from an operator seated in the cab (operator's cab) 12.
- the side means the vehicle width direction of the bulldozer 1, that is, the left direction or the right direction described above.
- the bulldozer 1 includes a traveling device 2, a vehicle main body 3, and a work machine 4.
- the traveling device 2 is a device for traveling the vehicle and has a crawler belt 11. The bulldozer 1 travels when the crawler belt 11 is driven.
- the vehicle body 3 includes a vehicle body frame 10 (see FIG. 2), a cab 12, an engine cover 13, and a cooling device 14 (see FIG. 1).
- the engine cover 13 is disposed in front of the cab 12.
- An engine chamber 8 (see FIG. 2) in which the engine 5 is housed is located in the engine cover 13.
- the upper surface 13a of the engine cover 13 is inclined rearward toward the upper side.
- the cooling device 14 is disposed behind the cab 12. Generally, in the bulldozer, the cooling device is disposed in front of the engine in the engine chamber 8 in front of the cab 12.
- the cooling device 14 includes, for example, a radiator that cools the coolant of the engine 5, an oil cooler that cools hydraulic oil, and a cooling fan that generates an air flow.
- the work machine 4 is provided in front of the engine cover 13.
- the work machine 4 includes a blade 15 and a blade drive mechanism 18.
- the central portion of the upper surface of the blade 15 extends upward compared to the left and right end portions of the upper surface of the blade, and functions as a spill guard that protects the hydraulic cylinder disposed on the rear surface of the blade 15.
- the blade drive mechanism 18 drives the blade 15.
- the blade drive mechanism 18 includes a hydraulic cylinder 16 and a blade support frame 17.
- the blade support frame 17 supports the blade 15 in a swingable manner.
- the hydraulic cylinder 16 includes a first cylinder 16a, a second cylinder 16b, a third cylinder 16c, and a fourth cylinder 16d.
- Both ends of the first cylinder 16a are rotatably connected to the blade support frame 17. Both ends of the second cylinder 16b are rotatably connected to the blade support frame 17. The first end of the third cylinder 16c is rotatably connected to the blade support frame 17. A second end of the third cylinder 16 c is connected to the blade 15. The first end of the fourth cylinder 16d is rotatably connected to the blade support frame 17. A second end of the fourth cylinder 16 d is connected to the blade 15.
- the first cylinder 16 a and the third cylinder 16 c are disposed on the left side of the engine cover 13.
- the second cylinder 16b and the fourth cylinder 16d are disposed on the right side of the engine cover 13.
- the first cylinder 16a and the second cylinder 16b move the blade 15 up and down.
- the third cylinder 16c and the fourth cylinder 16d change the posture of the blade 15. That is, the first cylinder 16a to the fourth cylinder 16d control the position or posture of the blade 15.
- FIG. 3 is a left side view showing the internal configuration of the engine compartment 8 in the engine cover 13.
- FIG. 4 is a right side view showing the internal configuration of the engine compartment 8 in the engine cover 13. The right side in FIG. 4 shows the front side of the vehicle.
- FIG. 5 is a front view showing the internal configuration of the engine compartment 8 in the engine cover 13.
- the vehicle body frame 10 and the engine cover 13 are shown by two-dot chain lines in FIGS. 3 and 4.
- the upper end of the vehicle body frame 10 and the engine cover 13 around the mount bracket 50 to be described later are shown by a two-dot chain line, and the outline of the engine 5 is shown by a dotted line. 2 to 5, a part of the configuration inside the engine chamber 8 is omitted as appropriate.
- the vehicle body 3 includes an engine 5, a flywheel housing 6, and a hydraulic pump 7.
- the engine 5 is disposed in the engine cover 13.
- the engine 5 is a diesel engine, and the output of the engine 5 is controlled by adjusting the fuel injection amount from a fuel injection pump (not shown).
- the engine 5 includes a crankcase 22, an oil pan 23, a cylinder body 24, a cylinder head 25, and a cylinder head cover 26.
- Engine 5 includes a crankshaft (not shown).
- the crankshaft extends in the vehicle front-rear direction.
- the engine 5 is a so-called vertical engine, and a long side is arranged in the vehicle front-rear direction and a short side is arranged in the vehicle width direction. With this arrangement, the width of the vehicle can be reduced, and thus visibility to the left and right lower ends of the blade 15 required for the bulldozer can be obtained.
- Ax4 indicates the center axis of the crankshaft.
- the crankcase 22 houses a crankshaft.
- a cam pulley (not shown) is disposed in front of the crankcase 22.
- the crankshaft is connected to the cam pulley.
- a belt 27 is wound around the cam pulley.
- the oil pan 23 is disposed below the crankcase 22.
- the cylinder body 24 is disposed on the upper side of the crankcase 22.
- the cylinder head 25 is disposed on the upper side of the cylinder body 24.
- the cylinder head cover 26 is disposed on the upper side of the cylinder head 25.
- the engine 5 includes a supercharger 28.
- the supercharger 28 is connected to the cylinder head 25 via an exhaust pipe (not shown) of the engine 5.
- the supercharger 28 is disposed on the side of the cylinder head 25 in the vehicle plan view. In the vehicle side view, at least a part of the supercharger 28 is located above the upper surface of the engine 5, that is, the upper surface of the cylinder head cover 26.
- the flywheel housing 6 is disposed behind the engine 5.
- the hydraulic pump 7 is disposed behind the flywheel housing 6 and is attached to the flywheel housing 6. That is, the hydraulic pump 7 is disposed behind the engine 5.
- the hydraulic pump 7 is connected to the output shaft of the engine 5 via a flywheel.
- the hydraulic pump 7 discharges hydraulic oil by being driven by a driving force from the engine 5.
- the cab 12 is disposed directly above the hydraulic pump 7. That is, the cab 12 is disposed behind the engine 5 and above the hydraulic pump 7.
- the vehicle body 3 includes an air cleaner 33 and a duct 34.
- the air cleaner 33 and the duct 34 are disposed below the upper surface 13 a of the engine cover 13.
- the air cleaner 33 is disposed above the engine 5.
- the air cleaner 33 is fixed to the engine cover 13.
- the air cleaner 33 has a cylindrical shape.
- a central axis Ax5 of the air cleaner 33 shown in FIG. 2 is arranged substantially horizontally along the vehicle width direction. Further, the air cleaner 33 is located behind the center position ML of the engine 5 in the vehicle front-rear direction. Specifically, the center axis Ax5 of the air cleaner 33 is located behind the center position ML of the engine 5 in the vehicle front-rear direction.
- the air cleaner 33 includes an intake port (not shown) and an exhaust port 331 (see FIGS.
- the intake port is connected to the head portion 35 (see FIG. 1) via a pipe member (not shown).
- the head portion 35 protrudes upward from the upper surface of the engine cover 13.
- the exhaust port 331 is provided on the side surface of the air cleaner 33. The exhaust port 331 is located above the supercharger 28 described above.
- the duct 34 connects the air cleaner 33 and the engine 5.
- the duct 34 extends downward from the exhaust port 331 of the air cleaner 33 and has a shape bent toward the supercharger 28.
- the duct 34 includes a first connection portion 36, a second connection portion 37, and a vibration absorbing portion 38.
- the first connection portion 36 is connected to the engine 5.
- the first connection portion 36 is connected to the supercharger 28.
- the second connection part 37 is connected to the air cleaner 33.
- the second connection portion 37 is connected to the exhaust port 331 of the air cleaner 33.
- the vibration absorbing portion 38 is located between the first connection portion 36 and the second connection portion 37 in the duct 34.
- the vibration absorber 38 has a bellows shape.
- the vehicle body 3 includes a first exhaust treatment device 41, a second exhaust treatment device 42, a relay connection pipe 43, a first connection pipe 45, and a second connection pipe 46.
- the first exhaust treatment device 41, the second exhaust treatment device 42, and the relay connection pipe 43 are collectively referred to as an exhaust treatment assembly 40.
- the first connection pipe 45 connects the engine 5 and the first exhaust treatment device 41. More specifically, the first connection pipe 45 connects the supercharger 28 and the first exhaust treatment device 41 described above.
- the second connection pipe 46 is connected to the second exhaust treatment device 42 and discharges the exhaust from the engine 5 processed by the second exhaust treatment device 42.
- the second connection pipe 46 is connected to the exhaust pipe 47 shown in FIG.
- the exhaust pipe 47 is disposed so as to protrude upward from the engine cover 13.
- the first exhaust treatment device 41 is, for example, a diesel oxidation catalyst (DOC) device, and processes exhaust from the engine 5 sent through the first connection pipe 45.
- the first exhaust treatment device 41 oxidizes and removes hydrocarbons (HC), carbon monoxide (CO), and soluble organic components (SOF) contained in the exhaust.
- DOC diesel oxidation catalyst
- the first exhaust treatment device 41 is disposed in front of the engine 5 and in the foremost position of the engine chamber 8. Such an arrangement is made possible by arranging the cooling device 14 not behind the engine compartment 8 but behind the cab 12. Further, the first exhaust treatment device 41 is disposed below the upper surface of the engine 5. Specifically, the first exhaust treatment device 41 is disposed below the upper surface of the cylinder head cover 26. The first exhaust treatment device 41 is disposed above the bottom surface of the oil pan 23.
- the first exhaust treatment device 41 has a substantially cylindrical outer shape.
- the vehicle width direction dimension of the first exhaust treatment device 41 is smaller than the vehicle width direction dimension of the engine 5. Further, the dimension in the vehicle width direction of the first exhaust treatment device 41 is smaller than the dimension in the vehicle width direction of the second exhaust treatment device 42.
- the first exhaust treatment device 41 is arranged such that its central axis Ax1 is along the vehicle width direction. That is, the longitudinal direction of the first exhaust treatment device 41 is along the vehicle width direction. Furthermore, the first exhaust treatment device 41 has a portion that overlaps with the engine 5 in a front view of the vehicle.
- the first exhaust treatment device 41 has a first connection port 41a and a second connection port 41b.
- the 1st connection pipe 45 is connected to the 1st connection port 41a.
- the relay connection pipe 43 is connected to the second connection port 41b.
- the first connection port 41a protrudes obliquely upward. Specifically, the first connection port 41a protrudes obliquely upward and toward the engine 5 side.
- the first connection pipe 45 extends obliquely downward from the connection position with the engine 5 toward the first exhaust treatment device 41.
- the first exhaust treatment device 41 is disposed at a position that does not overlap the engine 5 in a top view. That is, at least one of the first exhaust treatment device 41 and the second exhaust treatment device 42 is disposed at a position that does not overlap the engine 5 in a top view.
- the second connection port 41b is inclined slightly rearward from the vertical direction. Therefore, as shown in FIG. 2, the central axis Ax3 of the straight portion 43b (details will be described later) of the relay connecting pipe 43 is located slightly behind the central axis Ax1 in a top view.
- the relay connection pipe 43 connects the first exhaust treatment device 41 and the second exhaust treatment device 42. As shown in FIGS. 3 and 5, the outer diameter of the relay connection pipe 43 is smaller than the outer diameter of the first exhaust treatment device 41 and the outer diameter of the second exhaust treatment device 42. The first end of the relay connection pipe 43 is connected to the second connection port 41 b of the first exhaust treatment device 41. A second end opposite to the first end of the relay connection pipe 43 is connected to the third connection port 42 a of the second exhaust treatment device 42.
- the relay connection pipe 43 is disposed in front of the engine 5 and above the first exhaust treatment device 41. Furthermore, as shown in FIG. 5, the relay connection pipe 43 has a portion that overlaps with the engine 5 in a front view of the vehicle. The relay connection pipe 43 overlaps with a part of the first connection pipe 45 in the vehicle front view. As shown in FIG. 4, the relay connection pipe 43 passes through a position close to the first connection pipe 45.
- the relay connection pipe 43 includes a first bent portion 43a, a straight portion 43b, and a second bent portion 43c.
- the straight portion 43 b is located above the first exhaust treatment device 41.
- the linear part 43b is arrange
- the longitudinal direction of the relay connection pipe 43 is along the vehicle width direction.
- the first bent portion 43a connects the straight portion 43b and the second connection port 41b.
- the second bent portion 43 c connects the straight portion 43 b and the third connection port 42 a of the second exhaust treatment device 42.
- An injector 44 is attached to the first bent portion 43a.
- the injector 44 injects a reducing agent into the relay connection pipe 43.
- the reducing agent is, for example, urea water.
- the second exhaust treatment device 42 is, for example, a selective reduction catalyst device.
- the second exhaust processing device 42 processes the exhaust from the engine 5 processed by the first exhaust processing device 41.
- the second exhaust treatment device 42 selectively reduces nitrogen oxides NOx.
- the second exhaust treatment device 42 has a substantially cylindrical outer shape. As shown in FIGS. 3 to 5, the second exhaust treatment device 42 is disposed above the engine 5. As shown in FIG. 5, the second exhaust treatment device 42 is arranged such that the central axis Ax2 is along the vehicle width direction. Further, the second exhaust treatment device 42 is arranged such that the central axis Ax2 thereof is parallel to the central axis Ax1 of the first exhaust treatment device 41. That is, the longitudinal direction of the second exhaust treatment device 42 is along the vehicle width direction. Further, the second exhaust treatment device 42 is arranged so that the central axis Ax2 of the second exhaust treatment device 42 is above the upper end of the relay connection pipe 43.
- the upper end of the relay connection pipe 43 is positioned below the upper end of the second exhaust treatment device 42. Therefore, the first exhaust treatment device 41, the relay connection pipe 43, and the second exhaust treatment device 42 are arranged side by side in the vertical direction. In addition, the second exhaust treatment device 42 has a portion that overlaps the relay connection pipe 43 when viewed from the front of the vehicle.
- the second exhaust treatment device 42 is arranged so as to overlap a part of the engine 5 in a top view. That is, the second exhaust treatment device 42 has a portion that overlaps with the engine 5 in a top view of the vehicle. More specifically, as shown in FIGS. 3 and 4, the second exhaust treatment device 42 is disposed so as to overlap the belt 27 of the engine 5 in a top view.
- the second exhaust treatment device 42 is located in front of the center position ML of the engine 5 in the vehicle front-rear direction. Specifically, the rear end of the second exhaust treatment device 42 is located in front of the center position ML of the engine 5 in the vehicle front-rear direction.
- the front end F2 of the second exhaust treatment device 42 is located behind the rear end R1 of the first exhaust treatment device 41 in a side view of the vehicle. Furthermore, the front end F ⁇ b> 2 of the second exhaust treatment device 42 is located behind the rear end R ⁇ b> 3 of the relay connection pipe 43 in the vehicle side view. 3 and 4 show a straight line passing through the front end F1 of the first exhaust treatment device 41 and extending along the vertical direction by a dotted line. According to this, the front end F3 of the relay connection pipe 43 is located behind the front end F1 of the first exhaust treatment device 41 in the vehicle side view. In other words, the point represented by the central axis Ax3 of the relay connection pipe 43 is located behind the point represented by the central axis Ax1 of the first exhaust treatment device 41.
- the straight line VL passes through the point represented by the central axis Ax1 of the first exhaust treatment device 41 and is a straight line along the vertical direction.
- the straight line L1 is a straight line connecting a point represented by the central axis Ax1 of the first exhaust treatment device 41 and a point represented by the central axis Ax3 of the relay connection pipe 43.
- the straight line L2 is a straight line connecting the point represented by the central axis Ax3 of the relay connection pipe 43 and the point represented by the central axis Ax2 of the second exhaust treatment device 42.
- the straight line L3 is a straight line connecting the point represented by the central axis Ax1 of the first exhaust treatment device 41 and the point represented by the central axis Ax2 of the second exhaust treatment device 42.
- the straight line L1 is inclined backward by ⁇ 1 with respect to the straight line VL.
- the angle ⁇ 1 formed by the straight line VL and the straight line L1 is in the range of 0 ° to 20 °. That is, in the vehicle side view, the angle formed between the straight line connecting the point represented by the central axis Ax1 of the first exhaust treatment device 41 and the point represented by the central axis Ax3 of the relay connection pipe 43 and the vertical direction is 0 It is in the range of not less than 20 degrees and not more than 20 degrees.
- the straight line L2 is inclined backward by ⁇ 2 with respect to the straight line VL.
- the angle ⁇ 2 formed by the straight line VL and the straight line L2 is in the range of 40 degrees to 70 degrees. That is, in the vehicle side view, the angle formed by the straight line connecting the point represented by the central axis Ax3 of the relay connection pipe 43 and the point represented by the central axis Ax2 of the second exhaust treatment device 42 is 40 It is in the range of not less than 70 degrees and not more than 70 degrees.
- the straight line L3 is inclined backward by ⁇ 3 with respect to the straight line VL.
- the angle ⁇ 3 formed by the straight line VL and the straight line L3 is in the range of 10 degrees to 40 degrees.
- the angle formed by the straight line connecting the point represented by the central axis Ax1 of the first exhaust treatment device 41 and the point represented by the central axis Ax2 of the second exhaust treatment device 42 and the vertical direction is It is in the range of not less than 10 degrees and not more than 40 degrees.
- the second exhaust treatment device 42 has a third connection port 42a and a fourth connection port 42b.
- a relay connection pipe 43 is connected to the third connection port 42a.
- a second connection pipe 46 is connected to the fourth connection port 42b. That is, the second connection pipe 46 is connected to the second exhaust treatment device 42.
- the third connection port 42a is inclined downward from the horizontal direction toward the front.
- the fourth connection port 42b protrudes directly above.
- the second connecting pipe 46 projects upward above the engine 5.
- the upper part of the second connection pipe 46 protrudes upward from the engine cover 13.
- the engine 5, the first connection pipe 45, the first exhaust treatment device 41, the relay connection pipe 43, the second exhaust treatment device 42, the second connection pipe 46, and the exhaust pipe 47 are connected in series in order. Has been. Therefore, the exhaust from the engine 5 passes through the first connection pipe 45 and is sent to the first exhaust treatment device 41. In the first exhaust treatment device 41, mainly HC, CO, and SOF in the exhaust are removed. Next, the exhaust passes through the relay connection pipe 43 and is sent to the second exhaust treatment device 42. In the second exhaust treatment device 42, NOx is mainly reduced. Thereafter, the cleaned exhaust gas is discharged to the outside through the second connection pipe 46 and the exhaust pipe 47.
- the first exhaust treatment device 41, the relay connection pipe 43, the second exhaust treatment device 42, and the air cleaner 33 are arranged so as to surround the front and upper sides of the engine 5. Accordingly, the first exhaust treatment device 41, the relay connection pipe 43, the second exhaust treatment device 42, and the air cleaner 33 can be closely and closely arranged.
- the engine cover 13 covers the engine 5, the air cleaner 33, the first exhaust treatment device 41, the second exhaust treatment device 42, the relay connection pipe 43, and the injector 44.
- the upper surface 13 a of the engine cover 13 extends along the second exhaust treatment device 42 and the air cleaner 33.
- the front surface 13 b of the engine cover 13 extends along the first exhaust treatment device 41 and the relay connection pipe 43.
- the engine cover 13 further includes a curved surface 13c that smoothly connects the upper surface 13a and the front surface 13b. By providing the curved surface 13c, a region above the blade 15 that can be visually recognized by the operator is widened.
- FIG. 1 shows this content.
- FIG. 1 shows an upper region of the blade 15 viewed from the viewpoint 100 of an operator sitting on the cab 12 as a region between the straight lines 110 and 120.
- the viewpoint 100 corresponds to the light source position (filament position-centre-point: FPCP) defined in the ISO 5006 specification.
- the viewpoint 100 is a point that is raised by 680 mm in the vertical direction from the seat reference point (seat index point: SIP) defined in the ISO 5006 specification.
- a straight line 110 is a straight line connecting the viewpoint 100 and the upper end of the blade 15.
- a straight line 120 is a straight line passing through the viewpoint 100 and in contact with the engine cover 13.
- the straight line 120 is in contact with the curved surface 13 c, and it is understood that the region above the blade 15 that can be visually recognized by the operator is widened by providing the curved surface 13 c. As shown in FIG. 1, the straight line connecting the viewpoint 100 and the upper end of the blade 15 is located above the engine cover 13 in the vehicle side view.
- FIG. 6 is a left side view showing the positional relationship among the blade drive mechanism 18, the exhaust treatment assembly 40, and the engine cover 13 when the blade 15 is raised.
- illustration of the blade 15 is omitted.
- the blade drive mechanism 18 is separated from the engine cover by at least a distance d.
- the distance d is a margin provided so that the blade drive mechanism 18 does not collide with the engine cover 13.
- an imaginary line that passes through the rear end R4 of the blade driving mechanism when the blade 15 is raised most by the blade driving mechanism 18 and extends in the vertical direction is indicated by a one-dot chain line.
- the front surface 13 b of the engine cover 13 is positioned forward and below the rear end R ⁇ b> 4 of the blade drive mechanism. Further, the front end F1 of the first exhaust treatment device 41 is also positioned forward and below the rear end R4 of the blade drive mechanism 18.
- the vehicle main body 3 includes a mount bracket 50, a first support bracket 70, a second support bracket 80, a rear mount bracket 90, and dampers 31L, 31R, 32L, and 32R.
- the mount bracket 50 includes a lower mount bracket 51, an upper mount bracket 52, a left mount bracket 53, and a right mount bracket 54.
- the mount bracket 50 is disposed in the engine compartment 8.
- the left mount bracket 53, the right mount bracket 54, and the rear mount bracket 90 support the engine 5 on the vehicle body frame 10 via dampers 31L, 31R, 32L, and 32R.
- the mount bracket 50 is attached to the engine 5. Specifically, the left mount bracket 53 and the right mount bracket 54 are attached to the engine 5.
- the lower mount bracket 51 is attached to the left mount bracket 53 and the right mount bracket 54.
- the lower mount bracket 51 supports the first support bracket 70 and the upper mount bracket 52.
- the upper mount bracket 52 supports the second support bracket 80.
- the first support bracket 70 is attached to the mount bracket 50 and directly supports the first exhaust treatment device 41.
- the second support bracket 80 is attached to the mount bracket 50 and directly supports the second exhaust treatment device 42.
- FIG. 7 is a left side view of the mount bracket 50, the first support bracket 70, and the second support bracket 80.
- the left mount bracket 53 includes a left mount bracket base 53b, a left mount bracket attachment portion 53a, a left mount bracket extension 53e, and a left mount bracket connection portion 53c.
- the left mount bracket base 53 b is a flat plate-like member that is substantially parallel to the left side surface of the engine 5.
- the left mount bracket attachment portion 53a has, for example, an insertion hole for passing a bolt.
- the engine 5 has a screw hole into which a bolt is screwed at a position corresponding to the left mount bracket attachment portion 53a.
- the left mount bracket 53 is attached to the engine 5 by passing a bolt through the left mount bracket attachment portion 53a and screwing the bolt into the screw hole described above.
- the left mount bracket 53 is attached to the engine 5 by the left mount bracket attachment portion 53a.
- the left mount bracket extension 53e is a member extending leftward from the left mount bracket base 53b.
- the left mount bracket extension 53e has a left mounting hole 53h.
- a damper 31L is attached to the left attachment hole 53h.
- the damper 31L is supported by the mount bracket support portion 10a of the vehicle body frame 10.
- the right mount bracket 64 is configured substantially symmetrically with the left mount bracket 53. 4 and 7, the right mount bracket 54 includes a right mount bracket base portion 54b, a right mount bracket attachment portion 54a, a right mount bracket extension portion 54e, and a right mount bracket connection portion 54c.
- the right mount bracket base 54 b is a flat plate member that is substantially parallel to the right side surface of the engine 5.
- the right mount bracket attachment portion 54a has, for example, an insertion hole for passing a bolt.
- the engine 5 has a screw hole into which a bolt is screwed at a position corresponding to the right mount bracket mounting portion 54a. A bolt is passed through the right mount bracket attaching portion 54a, and the right mount bracket 54 is attached to the engine 5 by screwing the bolt into the screw hole described above.
- the right mount bracket 54 is attached to the engine 5 by the right mount bracket attachment portion 54a.
- the right mount bracket extension 54e is a member that extends rightward from the right mount bracket base 54b.
- the right mount bracket extension 54e has a right mounting hole 54h.
- the damper 31R is attached to the right attachment hole 54h.
- the damper 31R is supported by the mount bracket support portion 10b of the vehicle body frame 10.
- the mount bracket 50 is attached to the vehicle body frame 10 via the dampers 31L and 31R.
- the dampers 31L and 31R include elastic bodies such as rubber inside. Therefore, the mount bracket 50 is elastically supported by the mount bracket support portions 10a and 10b of the vehicle body frame 10 via the damper 31L and the damper 31R. Further, the left mounting hole 53h and the right mounting hole 54h are arranged away from each other in the vehicle width direction. That is, the dampers 31L and 31R are arranged away from each other in the vehicle width direction.
- the left mount bracket attachment portion 53a and the right mount bracket attachment portion 54a are referred to as a first connection portion.
- the mount bracket 50 includes a first connection portion.
- the first connection part is connected to the lower part of the engine 5.
- the lower portion of the engine 5 is, for example, a portion corresponding to a height lower than the cylinder body 24 of the engine 5.
- the engine 5 is elastically supported by the vehicle body frame 10 via the mount bracket 50 and the dampers 31L and 31R.
- the left mount bracket connecting portion 53c is connected to the lower mount bracket left connecting portion 51c of the lower mount bracket 51.
- the lower mount bracket left connection portion 51c has an insertion hole for allowing a bolt to pass therethrough, and the left mount bracket connection portion 53c has a screw hole into which the bolt is screwed. Then, a bolt is passed through the lower mount bracket left connecting portion 51c, and the lower mount bracket 51 is attached to the left mount bracket 53 by screwing the bolt into the screw hole described above.
- the right mount bracket connection portion 54c is connected to the lower mount bracket right connection portion 51d of the lower mount bracket 51.
- the lower mount bracket right connection portion 51d has, for example, an insertion hole for passing a bolt, and the right mount bracket connection portion 54c has a screw hole into which the bolt is screwed. Then, a bolt is passed through the lower mount bracket right connection portion 51d, and the lower mount bracket 51 is attached to the right mount bracket 54 by screwing the bolt into the screw hole described above.
- FIG. 8 is a front view of the mount bracket 50, the first support bracket 70, and the second support bracket 80. 7 and 8, the lower mount bracket 51 is separated from the left mount bracket 53 and the right mount bracket 54 from the lower mount bracket left connecting portion 51c and the lower mount bracket right connecting portion 51d (mounted on the bulldozer 1). Forward direction) and upward.
- the lower mount bracket 51 includes a plurality of reinforcing plates 51e and an upper surface 51u in addition to the lower mount bracket left connecting portion 51c and the lower mount bracket right connecting portion 51d.
- a lower attachment portion 52b of the upper mount bracket 52 is attached to the upper surface 51u. In the example of FIG. 8, the upper surface 51u and the lower attachment portion 52b are fixed by a plurality of screws.
- the upper mount bracket 52 includes a lower attachment portion 52b, an upper attachment portion 52u, and a wall portion 520.
- the lower mounting portion 52b is a flat plate member.
- the length of the lower mounting portion 52b in the front-rear direction is substantially equal to the length of the diameter of the first exhaust treatment device 41. Referring to FIG. 5, the length of the lower mounting portion 52b in the vehicle width direction is substantially equal to the length of the first exhaust treatment device 41 in the direction of the central axis Ax1.
- the lower attachment portion 52b is attached to the lower mount bracket 51, and the first support bracket 70 is attached to the lower attachment portion 52b.
- the lower mounting portion 52b, the upper surface 51u of the lower mount bracket 51, and the first support bracket 70 have an insertion hole for inserting a bolt and a screw hole provided at a position corresponding to the insertion hole.
- Bolts are passed through the aforementioned insertion holes, and the bolts are screwed into the aforementioned screw holes, whereby the lower mounting portion 52b, the upper surface 51u of the lower mount bracket 51, and the first support bracket 70 are fixed to each other with bolts.
- the wall portion 520 extends in the vertical direction from the rear end portion of the lower attachment portion 52b to the front end portion of the upper attachment portion 52u.
- the rear end portion of the lower attachment portion 52b is a portion of the lower attachment portion 52b that is behind the first support bracket 70 attached to the lower attachment portion 52b and is adjacent to the first support bracket 70.
- the front end portion of the upper attachment portion 52u is a portion of the upper attachment portion 52u adjacent to the second support bracket 80 in front of the second support bracket 80 attached to the upper attachment portion 52u.
- the wall 520 includes a flat base 521, front and rear reinforcing plates 522 and 523, a left reinforcing plate 524, and a right reinforcing plate 525.
- the front and rear reinforcing plates 522 and 523 are flat members along the vehicle front-rear direction.
- the reinforcing plates 522 and 523 have extending portions 522e and 523e that extend forward below the center axis Ax1 of the first exhaust treatment device 41.
- the left reinforcing plate 524 is a flat plate-like member extending leftward from the front / rear reinforcing plate 522.
- the right reinforcing plate 525 is a flat plate member that extends rightward from the front and rear reinforcing plates 523. As shown in FIG. 7, the left reinforcing plate 524 is bent forward and below the center axis Ax1 of the first exhaust treatment device 41, and is bent downward near the front end of the extending portion 522e.
- the right reinforcing plate 525 is also bent in the forward direction below the central axis Ax1 of the first exhaust treatment device 41, and is bent downward in the vicinity of the front end of the extending portion 523e.
- the front and rear reinforcing plates 523 extend further upward than the upper mounting portion 52u.
- An attachment hole 529 for attaching a load hanging hook is formed at the upper end of the front and rear reinforcing plate 523.
- the upper mounting portion 52 u is located above the wall portion 520. That is, the upper mounting portion 52u is supported by the wall portion 520 below the upper mounting portion 52u.
- the base portion 521 of the wall portion 520 is connected to the front end portion of the upper mounting portion 52u.
- the upper attachment portion 52u is a flat plate-like member extending rearward from the front end portion.
- the wall portion 520 includes an auxiliary support portion 526 extending rearward from the base portion 521.
- the upper attachment portion 52u is attached to the auxiliary support portion 526 by welding.
- the second support bracket 80 is attached to the upper attachment portion 52u by welding.
- the mount bracket 50 further includes a first intermediate connection portion 61, a second intermediate connection portion 62, and a third intermediate connection portion 63.
- the first intermediate connection portion 61, the second intermediate connection portion 62, and the third intermediate connection portion 63 are connected to different portions of the intermediate portion of the engine 5.
- the intermediate portion of the engine 5 is, for example, a portion that is higher than the crankcase 22 of the engine 5 and lower than the upper surface of the cylinder head cover 26. If the upper part of the engine 5 includes the upper surface of the cylinder head cover 26 of the engine 5 and is higher than the upper surface of the cylinder head cover 26, the intermediate part of the engine 5 is located between the upper part and the lower part of the engine.
- first intermediate connection portion 61, the second intermediate connection portion 62, and the third intermediate connection portion 63 are collectively referred to as a third connection portion.
- the first intermediate connection portion 61, the second intermediate connection portion 62, and the third intermediate connection portion 63 have corresponding insertion holes for inserting bolts, the bolts are passed through the insertion holes, and the bolts are passed to the engine.
- the mount bracket 50 is fixed to an intermediate portion of the engine 5 by screwing with the provided screw hole.
- the mount bracket 50 further includes a second connection portion 64. As shown in FIG. 7, the second connection portion 64 is connected to the upper portion of the engine 5 described above. The front end of the second connection portion 64 is attached to the upper attachment portion 52u.
- the mount bracket 50 further includes a relay connection pipe support portion 65.
- the relay connection pipe support portion 65 is a substantially L-shaped member that protrudes forward from the front and rear reinforcing plate 523.
- the relay connection pipe support portion 65 is connected to the right side surface of the front and rear reinforcing plate 523.
- the relay connection pipe support portion 65 includes an arcuate support surface 66 corresponding to the side surface shape of the relay connection pipe 43.
- a first fixing member 67 having a U-shaped shape can be attached to the relay connection pipe support portion 65.
- the relay connection pipe 43 is fixed by being fastened by the support surface 66 and the first fixing member 67.
- a lower mounting portion 52b, an upper mounting portion 52u, and a wall portion 520 are integrally formed. If the bolts on the lower mounting portion 52b and the upper surface 51u of the lower mounting bracket are removed, the exhaust treatment assembly 40 can be removed by the load hanging hook while being attached to the upper mounting bracket 52 using the mounting holes 529 at the upper ends of the front and rear reinforcing plates 523. It is. Therefore, maintenance of the exhaust treatment assembly 40 is facilitated.
- the mount bracket 50 is attached at a plurality of locations of the engine 5 by the second connection portion 64 and the third connection portion (the first intermediate connection portion 61, the second intermediate connection portion 62, and the third intermediate connection portion 63). . Since the mount bracket 50 has a heavy object (second exhaust treatment device 42) attached to the upper part, vibrations at the upper part of the mount brackets 50, particularly vibrations in the front-rear direction, are likely to increase. Since the second connection part 64 and the third connection part fix the upper mount bracket 52 to a plurality of locations of the engine 5, vibrations in the front-rear direction of the upper part of the mount bracket 50 are reduced.
- the first support bracket 70 further includes a first left support portion 73 and a first right support portion 74.
- the first left support portion 73 and the first right support portion 74 have an arcuate upper surface corresponding to the cylindrical side surface of the first exhaust treatment device 41.
- the first exhaust treatment device 41 is placed on the first left support portion 73 and the first right support portion 74.
- a second fixing member 78 having a U-shaped curve can be attached to the first left support portion 73.
- a third fixing member 79 having a U-shaped curve can be attached to the first right support portion 74.
- the first exhaust treatment device 41 is fixed to the first support bracket 70 by fastening the second fixing member 78 to the first left support portion 73 and fastening the third fixing member 79 to the first right support portion 74.
- the first exhaust treatment device 41 is attached to the first support bracket 70 and supported by the engine 5 via the mount bracket 50. That is, the first exhaust treatment device 41 is supported by the engine 5 via the first support bracket 70 and the mount bracket 50.
- the mount bracket 50 is elastically supported by the vehicle body frame 10. Therefore, the first exhaust treatment device 41 is elastically supported by the vehicle body frame 10 via the first support bracket 70 and the mount bracket 50.
- the second support bracket 80 further includes a second left support portion 83 and a second right support portion 84.
- the second left support portion 83 and the second right support portion 84 have an arcuate upper surface corresponding to the cylindrical side surface of the second exhaust treatment device 42.
- the second exhaust treatment device 42 is placed on the second left support portion 83 and the second right support portion 84.
- a fourth fixing member 88 having a U-shaped curved shape can be attached to the second left support portion 83.
- a fifth fixing member 89 having a U-shaped curved shape can be attached to the second right support portion 84.
- the second exhaust treatment device 42 is fixed to the second support bracket 80 by fastening the fourth fixing member 88 to the second left support portion 83 and fastening the fifth fixing member 89 to the third right support portion 84.
- the second exhaust treatment device 42 is attached to the second support bracket 80 and supported by the engine 5 via the mount bracket 50. That is, the second exhaust treatment device 42 is supported by the engine 5 via the second support bracket 80 and the mount bracket 50.
- the mount bracket 50 is elastically supported by the vehicle body frame 10. Accordingly, the second exhaust treatment device 42 is elastically supported by the vehicle body frame 10 via the second support bracket 80 and the mount bracket 50.
- the rear mount bracket 90 is attached to the rear surface of the flywheel housing 6. That is, the rear mount bracket 90 is disposed rearward of the mount bracket 50.
- the rear mount bracket 90 extends upward from the flywheel housing 6. That is, at least a part of the rear mount bracket 90 is located above the flywheel housing 6.
- the rear mount bracket 90 is located above the hydraulic pump 7.
- the rear mount bracket 90 is located below the upper surface of the cylinder head cover 26.
- the rear mount bracket 90 is located below the cab 12.
- the vertical positions of the mount bracket 50 and the rear mount bracket 90 are based on the vertical center of each bracket. Alternatively, the position of the seating surface of each bracket may be used as a reference.
- the damper 32L is supported by the mount bracket support portion 10c of the vehicle body frame 10.
- the damper 32 ⁇ / b> R is supported by the mount bracket support portion 10 d of the vehicle body frame 10. That is, the rear mount bracket 90 is attached to the vehicle body frame 10 via the dampers 32L and 32R.
- the damper 32L and the damper 32R are disposed away from each other in the vehicle width direction.
- the dampers 32L and 32R include elastic bodies such as rubber inside. Therefore, the rear mount bracket 90 is elastically supported by the mount bracket support portions 10c and 10d of the vehicle body frame 10 via the damper 32L and the damper 32R.
- the engine 5 is connected to the rear mount bracket 90 via the flywheel housing 6. Therefore, the engine 5 is elastically supported by the vehicle frame 10 via the rear mount bracket 90 and the dampers 32L and 32R.
- the bulldozer 1 has the following features. (1) In the bulldozer 1, the first exhaust treatment device 41 is disposed in front of the engine 5, and the second exhaust treatment device 42 is disposed above the engine 5. The longitudinal directions of the first exhaust treatment device 41 and the second exhaust treatment device 42 are along the vehicle width direction. Further, the front end F2 of the second exhaust treatment device 42 is located behind the rear end R1 of the first exhaust treatment device 41 in a side view of the vehicle. For this reason, even if the engine cover 13 has the upper surface 13a inclined forward and downward, the upper surface can be obtained by storing the first exhaust treatment device 41 and the second exhaust treatment device 42 in the engine chamber 8. It is not necessary to raise 13a significantly. As a result, the area of the upper part of the blade 15 of the work machine 4 that can be visually recognized by the worker is widened, and the deterioration of workability can be suppressed.
- the front end F2 of the second exhaust treatment device 42 is located behind the rear end R3 of the relay connection pipe 43. Therefore, the second exhaust treatment device 42 is disposed at a more rearward position in the engine chamber 8 where the height of the engine cover 13 is increased. Therefore, the height of the engine cover 13 can be further reduced. As a result, the worker can visually recognize a wider area above the blade 15 of the work machine 4.
- the second exhaust treatment device 42 has a portion that overlaps the relay connection pipe 43. That is, since the height of the second exhaust treatment device 42 is reduced, the height of the engine cover 13 can be further reduced. As a result, the worker can visually recognize a wider area above the blade 15 of the work machine 4.
- the second exhaust treatment device 42 is located in front of the center position ML in the front-rear direction of the engine 5. Therefore, since the piping between the relay connection pipe 43 and the second exhaust treatment device 42 can be shortened, the exhaust treatment assemblies 40 can be densely arranged. Therefore, maintenance of the exhaust treatment assembly 40 is facilitated.
- the air cleaner 33 is disposed above the engine 5 and below the upper surface 13a of the engine cover 13. Therefore, by arranging the air cleaner 33 in the empty space of the engine chamber 8 that is obtained by housing the first exhaust treatment device 41 and the second exhaust treatment device 42 in the engine chamber 8, the package volume can be reduced. It can be used effectively. That is, the engine compartment 8 can be reduced in size by filling the parts with high density inside the engine compartment 8. As a result, the worker can visually recognize a wide area of the blade 15 of the work machine 4.
- the front end F3 of the relay connection pipe 43 is located behind the front end F1 of the first exhaust treatment device 41.
- the front surface 13b and / or the curved surface 13c of the engine cover 13 can be provided rearward.
- the worker can visually recognize a wider area above the blade 15 of the work machine 4.
- the engine cover 13 has a curved surface 13c that smoothly connects the front surface 13b and the upper surface 13a. For this reason, compared with the case where the front surface 13b and the upper surface 13a are directly connected, the worker can visually recognize a wider area on the upper portion of the blade 15 of the work machine 4.
- the outer diameter of the relay connection pipe 43 is shorter than the outer diameter of the first exhaust treatment device 41 and the outer diameter of the second exhaust treatment device 42.
- the curvature of the curved surface 13c of the engine cover 13 can be lowered. That is, the radius of the arc that forms the curved surface 13c can be increased. Therefore, the worker can visually recognize a wider area above the blade 15 of the work machine 4.
- the bulldozer 1 includes a blade driving mechanism 18 that drives the blade 15.
- the front surface 13 b of the engine cover 13 is positioned forward and below the rear end R ⁇ b> 4 of the blade drive mechanism 18.
- the front end F1 of the first exhaust treatment device 41 is also positioned forward and below the rear end R4 of the blade drive mechanism 18.
- the first exhaust treatment device 41 can be disposed in a space in front of the engine 5 that does not affect the operation region of the blade drive mechanism 18. Therefore, even if the exhaust treatment device is disposed in front of the engine 5, the blade 15 can be disposed at a position close to the cab 12.
- the hydraulic pump 7 is disposed behind the engine 5.
- the engine cover 13 needs to be extended forward, and visibility of the upper part of the blade 15 of the work machine 4 is lowered.
- the hydraulic pump 7 is disposed behind the engine 5 and the first exhaust treatment device 41 is disposed in front of the engine 5.
- the longitudinal direction of the first exhaust treatment device 41 is along the vehicle width direction, the length of the space in which the first exhaust treatment device 41 is disposed in the front-rear direction can be small. Therefore, the front extension of the engine cover 13 can be suppressed. As a result, the worker can visually recognize a wider area above the blade 15 of the work machine 4.
- the cab 12 is disposed behind the engine 5 and above the hydraulic pump 7.
- the cab 12 is positioned above the hydraulic pump 7, so there is no dead space above the hydraulic pump 7. Therefore, in the bulldozer 1, the method of this embodiment in which the exhaust treatment assembly 40 is disposed above or in front of the engine 5 is effective.
- the first support bracket 70 that supports the first exhaust treatment device 41 and the second support bracket 80 that supports the second exhaust treatment device 42 are attached to the mount bracket 50.
- the first exhaust treatment device 41 and the second exhaust treatment device 42 can be attached or removed while the support brackets are attached to the corresponding exhaust treatment devices. Therefore, attachment and removal operations are facilitated.
- the mount bracket 50 includes a lower mounting portion 52b, an upper mounting portion 52u, and a wall portion 520 extending in the vertical direction from the rear end portion of the lower mounting portion 52b to the front end portion of the upper mounting portion 52u.
- the first exhaust treatment device 41 and the second exhaust treatment device 42 can be arranged side by side in the vertical direction, so that the engine chamber 8 can be prevented from being enlarged.
- the mount bracket 50 is connected to the lower portion of the engine 5 by the first connection portion (left mount bracket attachment portion 53a, right mount bracket attachment portion 54a).
- the mount bracket 50 is connected to the upper portion of the engine 5 by the second connection portion 64.
- the mount bracket 50 is connected to the intermediate portion of the engine 5 by the third connection portion (the first intermediate connection portion 61, the second intermediate connection portion 62, and the third intermediate connection portion 63). Therefore, the mount bracket 50 is fixed to the engine 5 in a compact manner. Thereby, the amount of protrusion of the upper surface 13a, the front surface 13b, and the curved surface 13c of the engine cover 13 can be suppressed.
- the shapes of the mounting bracket 50 and the rear mounting bracket 90 are not limited to the above shapes, and may be changed as appropriate.
- the shape of the 1st support bracket 70 and the 2nd support bracket 80 is not restricted to said shape, You may change suitably.
- the mount bracket 50, the first support bracket 70, and the second support bracket 80 may be formed as one piece, not as separate parts.
- the first exhaust treatment device 41 is described as a diesel oxidation catalyst device
- the second exhaust treatment device 42 is described as a selective reduction catalyst device.
- the first exhaust treatment device 41 may be a selective reduction catalyst device
- the second exhaust treatment device 42 may be a diesel oxidation catalyst device.
- the exhaust from the engine is preferably sent to the oxidation catalyst device for diesel first, in this case, the order and direction of the pipes connected to the first exhaust treatment device 41 and the second exhaust treatment device 42 are reversed. It becomes.
- the first exhaust treatment device 41 may be a diesel particulate filter device instead of the diesel oxidation catalyst device.
- the first exhaust treatment device 41 and the second exhaust treatment device 42 are not limited to a cylindrical shape or the like, and may have other shapes such as an elliptical cylindrical shape or a rectangular parallelepiped shape.
- the shapes of the support portions (73, 74) for supporting the first exhaust treatment device 41 and the support portions (83, 84) for supporting the second exhaust treatment device 42 are respectively the first exhaust treatment device 41.
- the shape of the side surface of the second exhaust treatment device 42 are respectively the first exhaust treatment device 41.
- the number of dampers 31L, 31R, 32L, 32R is arbitrary. However, it is desirable that the same number of dampers be provided in the left-right direction.
- the number of support portions (73, 74) that support the first exhaust treatment device 41, the number of support portions (83, 84) that support the second exhaust treatment device 42, and a fixing member that fixes the first exhaust treatment device 41 ( 78, 79) and the number of fixing members (88, 89) for fixing the second exhaust treatment device 42 are not limited to two, but may be one or three or more.
- the number and position of the holes for mounting the components included in the mount bracket 50, the first support bracket 70, and the second support bracket 80 can be changed as appropriate.
- the fixing method shown in the embodiment is merely an example, and components may be attached to the mount bracket 50, the first support bracket 70, and the second support bracket 80 by other fixing methods.
- a fixing means such as a hook or welding may be used.
- the present invention it is possible to provide a bulldozer that suppresses deterioration in workability even when at least two exhaust treatment devices are housed in the engine compartment.
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Abstract
Description
本発明の一実施形態に係るブルドーザ1の左側面図を図1に示す。本発明の一実施形態に係るブルドーザの一部を示す上面図を図2に示す。図2では、後述するエンジンカバー13が取り外された状態のエンジン室8を示している。なお、以下の説明において、前後方向とは、ブルドーザ1の前後方向を意味する。言い換えれば、前後方向とは、キャブ(運転室)12に着座したオペレータから見た前後方向を意味する。また、左右方向とは、キャブ(運転室)12に着座したオペレータから見た左右方向を意味する。側方とは、ブルドーザ1の車幅方向、すなわち、前述の左方向もしくは右方向のいずれかを意味する。
図3は、エンジンカバー13内のエンジン室8の内部構成を示す左側面図である。図4は、エンジンカバー13内のエンジン室8の内部構成を示す右側面図である。図4での右側が、車両の前側を示す。図5は、エンジンカバー13内のエンジン室8の内部構成を示す正面図である。なお、理解の容易のため、図3及び図4では、車体フレーム10及びエンジンカバー13が二点鎖線で図示されている。図5では、後述するマウントブラケット50周辺における車体フレーム10の上端とエンジンカバー13とが二点鎖線で図示されており、エンジン5の概略的な外形が点線で図示されている。また、図2~図5において、エンジン室8内の構成の一部を適宜省略している。図2~図4に示すように、車両本体3は、エンジン5と、フライホイールハウジング6と、油圧ポンプ7とを含む。エンジン5は、エンジンカバー13内に配置されている。
車両本体3は、第1排気処理装置41、第2排気処理装置42、中継接続管43、第1接続管45、及び、第2接続管46を含む。なお、第1排気処理装置41、第2排気処理装置42、及び中継接続管43を総称して、排気処理アセンブリ40と呼ぶ。第1接続管45は、エンジン5と第1排気処理装置41とを接続する。より詳細には、第1接続管45は、前述した過給器28と第1排気処理装置41とを接続する。第2接続管46は、第2排気処理装置42に接続し、第2排気処理装置42に処理されたエンジン5からの排気を排出する。第2接続管46は、図1に示される排気管47に接続されている。排気管47は、エンジンカバー13から上方に突出するように配置されている。
図2~図4に示すように、第1排気処理装置41、中継接続管43、第2排気処理装置42、及び、エアークリーナ33は、エンジン5の前方及び上方を取り囲むように配置される。これによって、第1排気処理装置41、中継接続管43、第2排気処理装置42、及び、エアークリーナ33を、近づけて密に配置することができる。
図3及び図4に示すように、車両本体3は、マウントブラケット50、第1支持ブラケット70、第2支持ブラケット80、後マウントブラケット90、及びダンパー31L,31R,32L,32Rを含む。マウントブラケット50は、下マウントブラケット51、上マウントブラケット52、左マウントブラケット53、及び右マウントブラケット54を含む。マウントブラケット50は、エンジン室8内に配置されている。左マウントブラケット53と右マウントブラケット54と後マウントブラケット90とは、ダンパー31L,31R,32L,32Rを介して、エンジン5を車体フレーム10上で支持している。
本実施形態に係るブルドーザ1は、以下の特徴を有する。
(1)ブルドーザ1では、第1排気処理装置41が、エンジン5の前方に配置され、第2排気処理装置42は、エンジン5の上方に配置される。第1排気処理装置41及び第2排気処理装置42の長手方向は、車幅方向に沿っている。また、車両側面視において、第2排気処理装置42の前端F2は、第1排気処理装置41の後端R1より後方に位置する。このため、エンジンカバー13が前方且つ下方に向かって傾斜する上面13aを有していても、第1排気処理装置41と第2排気処理装置42とをエンジン室8に収納することによって、当該上面13aを大幅に上昇しなくてもよい。その結果、作業者が視認できる作業機4のブレード15の上部の領域が広がり、作業性の低下を抑えることができる。
以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。
Claims (16)
- ブレードと、
エンジンと、
前記エンジンの前方、且つ、前記エンジンの上面より下方に配置され、前記エンジンからの排気を処理する第1排気処理装置と、
前記エンジンの上方に配置され、前記エンジンからの排気を処理する第2排気処理装置と、
前方且つ下方に向かって傾斜する上面を有し、前記エンジン、前記第1排気処理装置、及び前記第2排気処理装置を覆うエンジンカバーと、
を備え、
前記第1排気処理装置及び前記第2排気処理装置の長手方向は、車幅方向に沿っており、
前記第2排気処理装置は、車両上面視において、前記エンジンと重畳する部分を有し、
車両側面視において、前記第2排気処理装置の前端は、前記第1排気処理装置の後端より後方に位置する、
ブルドーザ。
- 前記第1排気処理装置の上方に配置され、前記第1排気処理装置と前記第2排気処理装置とを接続する中継接続管をさらに備え、
前記中継接続管の上端は、前記第2排気処理装置の上端よりも下方に位置する、
請求項1に記載のブルドーザ。
- 前記第2排気処理装置の前端は、前記中継接続管の後端より後方に位置する、
請求項2に記載のブルドーザ。
- 車両正面視において、前記第2排気処理装置は、前記中継接続管と重畳する部分を有する、請求項2に記載のブルドーザ。
- 前記第2排気処理装置は、前記エンジンの前後方向の中央位置よりも前方に位置する、請求項2に記載のブルドーザ。
- 前記エンジンよりも上方、且つ、前記エンジンカバーの前記上面よりも下方に配置されるエアークリーナをさらに備え、
前記エアークリーナは、前記エンジンの前後方向の中央位置よりも後方に位置する、
請求項1に記載のブルドーザ。
- 前記中継接続管の前端は、前記第1排気処理装置の前端よりも後方に位置する、請求項2に記載のブルドーザ。
- 前記エンジンカバーは、
前記第1排気処理装置及び前記中継接続管に沿う前面と、
前記上面と前記前面とを滑らかに接続する曲面と、
をさらに有する、請求項2に記載のブルドーザ。
- 前記中継接続管の外径は、前記第1排気処理装置の外径及び前記第2排気処理装置の外径よりも短い、請求項7に記載のブルドーザ。
- 前記ブレードを駆動するブレード駆動機構をさらに備え、
前記ブレード駆動機構によって、前記ブレードを最も上昇させたときに、前記エンジンカバーの前面は、前記ブレード駆動機構の後端よりも前方且つ下方に位置する、
請求項1に記載のブルドーザ。
- 前記エンジンの後方に配置される油圧ポンプをさらに備える、
請求項1から10のいずれかに記載のブルドーザ。
- 前記エンジンの後方、且つ、前記油圧ポンプの上方に配置される、キャブをさらに備える、請求項11に記載のブルドーザ。
- 車両側面視において、前記第1排気処理装置の中心軸線により表される点と前記中継接続管の中心軸線により表される点とを結ぶ直線と鉛直方向とのなす角は、0度以上20度以下の範囲内であり、
車両側面視において、前記中継接続管の中心軸線により表される点と前記第2排気処理装置の中心軸線により表される点とを結ぶ直線と前記鉛直方向とのなす角は、40度以上70度以下の範囲内にあり、
車両側面視において、前記第1排気処理装置の中心軸線により表される点と前記第2排気処理装置の中心軸線により表される点とを結ぶ直線と前記鉛直方向とのなす角は、10度以上40度以下の範囲にある、
請求項2に記載のブルドーザ。
- 前記エンジンに取り付けられるマウントブラケットと、
前記マウントブラケットに取り付けられ、前記第1排気処理装置を支持する第1支持ブラケットと、
前記マウントブラケットに取り付けられ、前記第2排気処理装置を支持する第2支持ブラケットと、をさらに備える、請求項1に記載のブルドーザ。
- 前記マウントブラケットは、
前記第1支持ブラケットを取り付ける下取付部と、
前記第2支持ブラケットを取り付ける上取付部と、
前記下取付部の後端部から前記上取付部の前端部まで鉛直方向に伸びる壁部と、
を含む、請求項14に記載のブルドーザ。
- 前記マウントブラケットは、
前記エンジンの下部と接続する第1接続部と、
前記エンジンの上部と接続する第2接続部と、
前記上部と前記下部との間の前記エンジンの中間部と接続する第3接続部と、
を含む、請求項14に記載のブルドーザ。
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CN201480001037.4A CN105283643B (zh) | 2014-07-03 | 2014-07-03 | 推土机 |
US14/389,513 US9809954B2 (en) | 2014-07-03 | 2014-07-03 | Bulldozer |
JP2014533308A JP5698420B1 (ja) | 2014-07-03 | 2014-07-03 | ブルドーザ |
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JP2011047390A (ja) * | 2009-08-29 | 2011-03-10 | Iseki & Co Ltd | 作業車両 |
WO2011152306A1 (ja) * | 2010-05-31 | 2011-12-08 | 株式会社小松製作所 | 作業車両 |
JP2013227729A (ja) * | 2012-04-24 | 2013-11-07 | Komatsu Ltd | ブルドーザ |
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US9809954B2 (en) | 2017-11-07 |
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CN105283643B (zh) | 2017-10-20 |
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