WO2023145293A1 - 作業機械 - Google Patents
作業機械 Download PDFInfo
- Publication number
- WO2023145293A1 WO2023145293A1 PCT/JP2022/046426 JP2022046426W WO2023145293A1 WO 2023145293 A1 WO2023145293 A1 WO 2023145293A1 JP 2022046426 W JP2022046426 W JP 2022046426W WO 2023145293 A1 WO2023145293 A1 WO 2023145293A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- region
- air
- body cover
- vehicle body
- exhaust port
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims description 31
- 238000005192 partition Methods 0.000 claims description 22
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 239000003507 refrigerant Substances 0.000 claims description 10
- 230000004048 modification Effects 0.000 description 10
- 238000012986 modification Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 3
- 239000013529 heat transfer fluid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
Images
Classifications
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2095—Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
-
- 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
- E02F9/20—Drives; Control devices
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2062—Control of propulsion units
- E02F9/207—Control of propulsion units of the type electric propulsion units, e.g. electric motors or generators
-
- 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
- E02F9/20—Drives; Control devices
- E02F9/2058—Electric or electro-mechanical or mechanical control devices of vehicle sub-units
- E02F9/2091—Control of energy storage means for electrical energy, e.g. battery or capacitors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/40—Working vehicles
-
- 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
- B60Y2200/412—Excavators
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- This disclosure relates to working machines.
- Patent Document 1 discloses an electric excavator as an example of a working machine.
- An electric excavator is equipped with an electric motor driven by electric power stored in a battery device, instead of an engine included in a conventional hydraulic excavator.
- the electric motor drives a hydraulic pump for supplying pressure oil to hydraulic cylinders of the work machine.
- BTMS Battery Thermal Management System
- the BTMS when cooling the heat transfer fluid, the BTMS itself also exchanges heat, so if the exhaust from the BTMS flows into the battery device, the BTMS will increase the temperature control load of the battery device.
- An object of the present disclosure is to provide a working machine capable of reducing the temperature control load of the battery device.
- a work machine includes a first region in which a battery device is arranged, a second region in which a battery thermal management system that controls the temperature of the battery device is arranged, and the first region and the second region. It has a surrounding polyhedral body cover.
- the orientation of the surface on which the first air inlet for introducing air into the first region is formed differs from the orientation of the surface on which the second air outlet for leading air from the second region is formed.
- a working machine relates to the first aspect, and in the vehicle body cover, the direction of the surface on which the first exhaust port for leading air from the first region is formed is the second It differs from the orientation of the surface on which the second air inlet for introducing air into the region is formed.
- a work machine relates to the first or second aspect, and in the vehicle body cover, the surface on which the first air intake port is formed is the same as the surface on which the second air outlet is formed. Located opposite.
- a work machine relates to any one of the first to third aspects, wherein the first region contains hydraulic oil supplied to the work machine and refrigerant supplied to an air conditioner.
- a cooling unit that cools at least one is arranged, and the cooling unit is arranged downstream of the battery device in a direction in which air flows in the first region.
- a working machine according to a fifth aspect of the present disclosure, according to any one of the first to fourth aspects, further includes a cab arranged in front of the vehicle body cover.
- the surface on which the second exhaust port is formed is the front surface of the vehicle body cover, and at least a portion of the second exhaust port is separated from the cab when viewed from the front.
- a work machine relates to any one of the first to fifth aspects above, and includes an electric motor driven by electric power of the battery device and a hydraulic pump driven by the electric motor. It further comprises a third region and a first partition plate that partitions the first region and the third region.
- a work machine according to a seventh aspect of the present disclosure, according to any one of the first to sixth aspects, further includes a second partition plate that partitions the first area and the second area.
- a work machine according to an eighth aspect of the present disclosure, according to any one of the first to seventh aspects, further includes a straightening member.
- the battery thermal management system has an outlet for discharging air, and the straightening member directs the air discharged from the outlet of the battery thermal management system to the second outlet of the vehicle body cover. lead.
- FIG. 1 is a perspective view of an electric excavator according to an embodiment
- FIG. 1 is a perspective view of an electric excavator according to an embodiment
- FIG. 1 is a front view of an electric excavator according to an embodiment
- FIG. It is a sectional view showing an air flow in the 1st field concerning an embodiment.
- FIG. 5 is a cross-sectional view showing airflow in a second region according to the embodiment;
- FIG. 14 is a schematic diagram showing a configuration within a second region according to Modification 7;
- FIG. 21 is a perspective view of a rectifying member according to Modification 7;
- FIG. 1 is a perspective view of the electric excavator 1 as seen from the rear right.
- FIG. 2 is a perspective view of the electric excavator 1 as seen from the rear left.
- FIG. 3 is a front view of the electric excavator 1.
- upper and lower mean upward and downward in the vertical direction.
- Front and rear refer to the front and rear of the electric excavator 1 in the longitudinal direction, and
- left and right refer to the left and right when the electric excavator 1 faces forward. means the direction
- the electric excavator 1 includes a lower traveling body 2, an upper revolving body 3, a working machine unit 4, and a cab 5.
- the undercarriage 2 has a track frame 20 , driving wheels 21 , driven wheels 22 and crawler belts 23 .
- the track frame 20 extends in the front-rear direction.
- the drive wheels 21 are supported by the rear end portion of the track frame 20 .
- a driven wheel 22 is supported at the front end of the track frame 20 .
- the crawler belt 23 is stretched over the driving wheels 21 and the driven wheels 22 .
- the upper revolving body 3 is arranged above the lower traveling body 2 .
- the upper revolving body 3 can be revolved with respect to the lower traveling body 2 .
- the upper revolving body 3 has a revolving frame 31 (an example of a “vehicle frame”) and a vehicle body cover 32 .
- the revolving frame 31 is arranged above the undercarriage 2 .
- the swing frame 31 is supported by the undercarriage 2 .
- the body cover 32 covers the space above the revolving frame 31.
- the vehicle body cover 32 is formed in a polyhedral shape. 1 and 2, the inside of the vehicle body cover 32 is shown transparently.
- the vehicle body cover 32 surrounds the first area S1, the second area S2 and the third area S3.
- a battery device 33 and a cooling unit 34 are arranged in the first area S1.
- the battery device 33 is arranged on the rear end of the revolving frame 31 .
- the battery device 33 includes a plurality of vertically stacked battery packs and a water jacket in which a heat transfer liquid circulates.
- a plurality of batteries are arranged inside each battery pack.
- Each battery is maintained within an appropriate temperature range (eg, 20° C. to 35° C.) by circulating the heat transfer fluid inside the water jacket.
- the battery device 33 also functions as a counterweight that a conventional hydraulic excavator has.
- the cooling unit 34 is arranged on the left end of the revolving frame 31 .
- the cooling unit 34 has a hydraulic oil cooling device and a refrigerant cooling device.
- the hydraulic oil cooling device cools the hydraulic oil supplied to the working machine drive section 41, which will be described later.
- the hydraulic oil cooling device includes an oil cooler through which hydraulic oil circulates and a cooling fan for blowing air to the oil cooler. Hydraulic oil circulating inside the oil cooler is cooled by blowing air from a cooling fan.
- the refrigerant cooling device cools the refrigerant supplied to the air conditioner arranged in the cab 5 .
- a refrigerant cooling device includes a condenser and a cooling fan for blowing air to the condenser. The refrigerant circulating inside the condenser is cooled by air blown by a cooling fan.
- the first area S1 is separated from the third area S3 by the first partition plate 35.
- the first partition plate 35 is formed in a plate shape.
- the shape of the first partition plate 35 is not particularly limited.
- the first partition plate 35 may not completely seal the space between the first region S1 and the third region S3, and the first region S1 and the third region S3 may be partially connected.
- the first area S1 is separated from the second area S2 by the second partition plate 36.
- the second partition plate 36 is formed in a plate shape.
- the shape of the second partition plate 36 is not particularly limited.
- the second partition plate 36 may not completely seal the space between the first region S1 and the second region S2, and the first region S1 and the second region S2 may be partially connected.
- the second area S2 is provided above the first area S1.
- a BTMS (Battery Thermal Management System, an example of a battery thermal management system) 61 and a DC/DC converter 62 are arranged in the second area S2.
- the BTMS 61 controls the temperature of the battery device 33.
- BTMS 61 includes a chiller, a circulation pump, a compressor, a condenser, a blower and a heater.
- the circulation pump sends the heat transfer fluid cooled by the compressor, condenser and blower or heated by the heater to the water jacket of the battery device 33 .
- each battery of the battery device 33 is maintained in an appropriate temperature range (for example, 20° C. to 35° C.), and thermal deterioration of each battery is suppressed.
- the DC/DC converter 62 drops the voltage of the DC power supplied from the battery device 33.
- the third area S3 is provided to the right of the first area S1 and the second area S2.
- An inverter 71, an electric motor 72, a hydraulic pump 73, and a control valve 74 are arranged in the third area S3.
- the inverter 71 converts the DC power supplied from the DC/DC converter 62 into AC power of a desired frequency.
- the electric motor 72 is driven by AC power supplied from the inverter 71 .
- the electric motor 72 operates the lower traveling body 2 and the work implement unit 4 .
- the electric motor 72 operates the lower traveling body 2 and the working machine unit 4 by driving a hydraulic pump 73 for supplying pressure oil to the lower traveling body 2 and the working machine unit 4 .
- the hydraulic pump 73 supplies pressure oil to the undercarriage 2 and the work implement unit 4 via the control valve 74 .
- the work machine unit 4 has a work machine 40 and a work machine drive section 41 .
- Work implement 40 includes a boom 42 , an arm 43 and a bucket 44 .
- the work machine driving portion 41 includes a boom cylinder 45 , an arm cylinder 46 and a bucket cylinder 46 .
- the boom cylinder 45 , the arm cylinder 46 and the bucket cylinder 46 are operated by pressure oil supplied from the hydraulic pump 73 .
- the cab 5 is arranged on the front end of the revolving frame 31 . Inside the cab 5, there are arranged a seat on which the driver sits, and various operation levers for operating the lower traveling body 2, the working machine unit 4, and the like.
- the vehicle body cover 32 is formed in a polyhedral shape.
- the vehicle body cover 32 has a plurality of outer surfaces.
- the body cover 32 has a first rear surface T11, a second rear surface T12, a front surface T2, a first left surface T31, a second left surface T32, a first right surface T41, a second right surface T42, an upper surface T5, and a lower surface T6.
- Each surface is an example of the surface of the vehicle body cover 32 .
- Each face may be partially or wholly curved or curved.
- the first rear surface T11 and the second rear surface T12 are surfaces facing rearward.
- the front surface T2 is a surface facing forward.
- the first left surface T31 and the second left surface T32 are surfaces facing left.
- the first right surface T41 and the second right surface T42 are surfaces facing right.
- the upper surface T5 is an upward surface.
- the lower surface T6 is a downward surface.
- the orientation of the surface means the orientation from the inside to the outside of the body cover.
- the first rear surface T11 is located behind the first region S1 and the third region S3.
- the first rear surface T11 is connected to respective rear end portions of the first left surface T31 and the first right surface T41.
- the second rear surface T12 is located behind the second region S2.
- the second rear surface T12 is located above the first rear surface T11.
- the second rear surface T12 is connected to rear ends of the second left surface T32 and the second right surface T42.
- the first rear surface T11 and the second rear surface T12 are located on opposite sides of the front surface T2.
- the front surface T2 is connected to front ends of the first left surface T31, the first right surface T41, the second left surface T32, and the second right surface T42.
- the first left surface T31 is located to the left of the first area S1.
- the second left surface T32 is located to the left of the second region S2.
- the second left surface T32 is located above the first left surface T31.
- the first right surface T41 is located to the right of the third region S3.
- the second right surface T42 is located to the right of the second region S2.
- the second right surface T42 is located above the first right surface T41.
- the upper surface T5 is connected to upper ends of the second rear surface T12, the front surface T2, the second left surface T32, and the second right surface T42.
- the upper surface T5 is located on the opposite side of the lower surface T6.
- the lower surface T6 is connected to lower ends of the first rear surface T1, the front surface T2, the first left surface T31, and the first right surface T41.
- the first rear surface T1 is formed with a first intake port P1 for introducing air into the first region S1.
- the first intake port P1 opens rearward. Outside air is drawn into the first region S1 through the first air inlet P1 by the suction force of the cooling fan included in the cooling unit 34 described above. Outside air is taken into the first area S1 from the rear.
- the second rear surface T2 is formed with a second intake port P2 for introducing air into the second region S2.
- the second intake port P2 opens rearward. Outside air is taken into the second region S2 through the second air inlet P2 by the suction force of the blower of the BTMS 61 described above. Outside air is taken into the second area S2 from the rear.
- the second right surface T42 is formed with a third intake port P3 for introducing air into the second region S2.
- the third intake port P3 opens rightward. Outside air is taken into the second region S2 through the third air inlet P3 by the suction force of the blower of the BTMS 61 described above. Outside air is taken into the second area S2 from the right side.
- the first left surface T3 is formed with a first exhaust port Q1 for guiding air from the first region S1.
- the first exhaust port Q1 opens leftward.
- the inside air in the first region S1 blown out from the cooling fan included in the cooling unit 34 is discharged to the outside through the first exhaust port Q1.
- the inside air in the first region S1 is discharged leftward from the first exhaust port Q1.
- the front surface T2 is formed with a second exhaust port Q2 for leading air from the second region S2.
- the second exhaust port Q2 opens forward.
- the inside air in the second region S2 blown out from the blower of the BTMS 61 described above is discharged to the outside through the second exhaust port Q2.
- the internal air in the second region S2 is discharged forward from the second exhaust port Q2.
- the entire second exhaust port Q ⁇ b>2 is separated from the cab 5 when the vehicle body cover 32 is viewed from the front. That is, the second exhaust port Q2 does not overlap the cab 5 when the vehicle body cover 32 is viewed from the front.
- FIG. 4 is a cross-sectional view showing the air flow in the first region S1 with arrows
- FIG. 5 is a cross-sectional view showing the air flow in the second region S2 with arrows.
- outside air taken into the first region S1 from the first air inlet P1 formed in the first rear surface T11 passes through the cooling unit 34 after passing through the battery device 33, and flows through the first left surface T11. It is discharged to the outside from the first exhaust port Q1 formed at T31.
- outside air taken into the second region S2 from the second air intake P2 formed in the second rear surface T12 and the third air intake P3 formed in the second right surface T42 passes through the BTMS 61. After that, it is discharged to the outside from the second exhaust port Q2 formed in the front surface T2.
- the orientation of the first rear surface T11 where the first air inlet P1 is formed differs from the orientation of the front surface T2 where the second air outlet Q2 is formed.
- Inside air in the second area S2 is discharged forward, and outside air is taken in from the rear in the first area S1. Therefore, it is possible to prevent the warm air discharged from the second area S2 from being taken into the first area S1.
- the temperature control load of the battery device 33 by the BTMS 61 can be reduced.
- the first rear surface T11 in which the first air inlet P1 is formed is located on the opposite side of the front surface T2 in which the second air outlet Q2 is formed, air is discharged from the second region S2. It is easy to prevent the warm air from entering the first region S1.
- the orientation of the first left surface T31 where the first exhaust port Q1 is formed is different from the orientation of the second rear surface T1 where the second intake port P2 is formed, and the direction of the second rear surface T1 where the third intake port P3 is formed. It is different from the direction of the right surface T42.
- Inside air in the first area S1 is discharged to the left, and outside air is taken in from the rear and right in the second area S2. Therefore, it is possible to prevent the warm air discharged from the first area S1 from being taken into the second area S2.
- heating of the BTMS 61 can be suppressed, the temperature control load of the battery device 33 by the BTMS 61 can be further reduced.
- the cooling unit 34 is arranged downstream of the battery device 33 in the direction in which the air flows in the first region S1. Therefore, when the outside air temperature is high, the air cooled by passing through the battery device 33 whose temperature is controlled by the BTMS 61 can be supplied to the cooling unit 34. Therefore, the cooling efficiency of the hydraulic oil and refrigerant in the cooling unit 34 can be improved. can be improved. In addition, when the outside air temperature is low, since the air heated by passing through the battery device 33 temperature-controlled by the BTMS 61 can be supplied to the cooling unit 34, overcooling of the cooling unit 34 can be suppressed. .
- the second exhaust port Q2 is separated from the cab 5 when the vehicle body cover 32 is viewed from the front. Therefore, it is possible to prevent the cab 5 from being heated by the exhaust heat from the second region S2.
- the first intake port P1 is formed in the first rear surface T11 and the second exhaust port Q2 is formed in the front surface T2, but this is not the only option.
- the orientation of the surface on which the first air inlet P1 is formed and the orientation of the surface on which the second air outlet Q2 is formed are different, the surfaces on which the first air inlet P1 and the second air outlet Q2 are formed are , can be arbitrarily selected from a plurality of surfaces of the body cover 32 .
- the first exhaust port Q1 is formed in the first left surface T31 and the second intake port P2 is formed in the first rear surface T11, but this is not the only option.
- the orientation of the surface on which the first exhaust port Q1 is formed and the orientation of the surface on which the second intake port P2 is formed are different, the surfaces on which the first exhaust port Q1 and the second intake port P2 are formed are , can be arbitrarily selected from a plurality of surfaces of the body cover 32 .
- the entire second exhaust port Q2 is separated from the cab 5 when viewed from the front of the vehicle body cover 32, but only a part of the second exhaust port Q2 may be separated from the cab 5. . If at least part of the second exhaust port Q2 is separated from the cab 5, heating of the cab 5 can be suppressed.
- cooling unit 34 cools both the hydraulic oil and the refrigerant in the above embodiment, it may cool either the hydraulic oil or the refrigerant.
- the working machine may be any machine that operates with the electric power of the battery device, and examples of such working machine include an electric wheel loader and a motor grader.
- FIG. 6 is a schematic diagram showing another configuration of the second region S2.
- the arrows indicate the wind flow.
- the BTMS 61 has a first inlet a1, a second inlet a2 and an outlet a3.
- the air taken into the second region S2 through the second air intake port P2 of the vehicle body cover 32 flows into the BTMS 61 through the first air intake port a1.
- the air taken into the second region S2 through the third air intake port P3 of the vehicle body cover 32 flows into the BTMS 61 through the second air intake port a2.
- the air that has flowed into the BTMS 61 from the first intake port a1 and the second intake port a2 is discharged to the outside of the BTMS 61 through the discharge port a3.
- the air discharged from the exhaust port a3 is discharged to the outside of the vehicle body cover 32 through the second exhaust port Q2 of the vehicle body cover 32.
- the electric excavator 1 may include a straightening member 8 arranged between the exhaust port a3 of the BTMS 61 and the second exhaust port Q2 of the vehicle body cover 32.
- the straightening member 8 guides the air discharged from the exhaust port a3 of the BTMS 61 to the second exhaust port Q2 of the vehicle body cover 32 .
- FIG. 7 is a perspective view of the rectifying member 8.
- the straightening member 8 has a pair of fixed portions 81 , a pair of leg portions 82 , a first straightening plate 83 and a second straightening plate 84 .
- the pair of fixing parts 81 are fixed to the second partition plate 36 by bolts (not shown).
- the pair of leg portions 82 are erected on the pair of fixed portions 81 .
- the first current plate 83 is supported by a pair of leg portions 82 .
- the first current plate 83 is formed in a plate shape.
- the first straightening plate 83 has a first straightening surface 83a.
- the first straightening surface 83a is an upward surface. In FIG. 7, the first straightening surface 83a is inclined with respect to the horizontal direction. It can be changed as appropriate according to the vertical position of the lower side of each of the exhaust ports Q2.
- the second straightening plate 84 is arranged on one end of the first straightening plate 83 .
- the second current plate 84 is formed in a plate shape.
- the second straightening plate 84 has a second straightening surface 84a.
- the second rectifying surface 84a is a leftward surface.
- the first current plate 83 is arranged between the exhaust port a3 of the BTMS 61 and the second exhaust port Q2 of the vehicle body cover 32 when viewed from above.
- the first straightening plate 83 covers the lower part of the gap space between the exhaust port a3 of the BTMS 61 and the second exhaust port Q2 of the vehicle body cover 32 . This can prevent the warm air discharged from the discharge port a3 of the BTMS 61 from returning to the inside of the second area S2. Also, when there is a gap between the vehicle body cover 32 and the second partition plate 36, it is possible to prevent warm air discharged from the discharge port a3 of the BTMS 61 from flowing into the first region S1. Note that the first current plate 83 may cover part or all of the lower part of the gap space.
- the second current plate 84 is arranged between the exhaust port a3 of the BTMS 61 and the second exhaust port Q2 of the vehicle body cover 32 in top view.
- the second straightening plate 84 covers the lateral side (the right side in the example shown in FIG. 6) of the clearance space between the outlet a3 of the BTMS 61 and the second outlet Q2 of the vehicle body cover 32 . This can prevent the warm air discharged from the discharge port a3 of the BTMS 61 from returning to the inside of the second area S2.
- the second current plate 84 may cover a part of the lateral side of the gap space, or may cover the entire side thereof.
- Second partition Plate 4 Work machine unit 40 Work machine 41 Work machine drive unit 5 Cab 61 BTMS 62 DC/DC converter 71 Inverter 72 Electric motor 73 Hydraulic pump 74 Control valve P1 First intake port P2 Second intake port P3 Third intake port Q1 First exhaust port Q2 Second exhaust port S1 First region S2 Second region , S3...Third region, T11...First rear surface, T12...Second rear surface, T2...Front surface, T31...First left surface, T32...Second left surface, T41...First right surface, T42...Second right surface, T5...Top surface , T6... bottom surface
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- Chemical & Material Sciences (AREA)
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Abstract
Description
本実施形態に係る電動式ショベル1(「作業機械」の一例)の構成について図面を参照しながら説明する。
図1~3に示すように、車体カバー32は、多面体形状に形成される。車体カバー32は、複数の外面を有する。具体的には、車体カバー32は、第1後面T11と第2後面T12と前面T2と第1左面T31と第2左面T32と第1右面T41と第2右面T42と上面T5と下面T6を有する。各面は、車体カバー32の面の一例である。各面は、部分的或いは全体的に湾曲又は屈曲していてもよい。
以上、本発明の実施の形態について説明したが、本発明はこれに限定されることなく、その発明の技術的思想を逸脱しない範囲で適宜変更可能である。
上記実施形態において、第1吸気口P1は第1後面T11に形成され、第2排気口Q2は前面T2に形成されることとしたがこれに限られない。第1吸気口P1が形成される面の向きと第2排気口Q2が形成される面の向きとが異なっている限り、第1吸気口P1及び第2排気口Q2それぞれが形成される面は、車体カバー32の複数の面から任意に選択できる。
上記実施形態において、第1排気口Q1は第1左面T31に形成され、第2吸気口P2は第1後面T11に形成されることとしたがこれに限られない。第1排気口Q1が形成される面の向きと第2吸気口P2が形成される面の向きとが異なっている限り、第1排気口Q1及び第2吸気口P2それぞれが形成される面は、車体カバー32の複数の面から任意に選択できる。
上記実施形態において、第2領域S2は、第1領域S1の上方に設けられることとしたが、第1領域S1の下方に設けられてもよい。
上記実施形態では、車体カバー32の前面視において、第2排気口Q2の全体がキャブ5から離れていることとしたが、第2排気口Q2の一部のみがキャブ5から離れていてもよい。第2排気口Q2の少なくとも一部がキャブ5から離れていれば、キャブ5の加熱を抑制できる。
上記実施形態において、冷却ユニット34は、作動油及び冷媒の両方を冷却することとしたが、作動油及び冷媒のいずれか一方を冷却してもよい。
上記実施形態では、作業機械の一例として電動式ショベルについて説明したが、作業機械はこれに限られない。作業機械は、バッテリ装置の電力で作業機を作動させるものであればよく、そのような作業機械としては、電動式のホイールローダ、モータグレーダなどが挙げられる。
図6は、第2領域S2の他の構成を示す模式図である。図6では、矢印で風流れが示されている。
Claims (8)
- バッテリ装置の電力で作業機を作動させる作業機械であって、
前記バッテリ装置が配置される第1領域と、
前記バッテリ装置を温度管理するバッテリ熱管理システムが配置される第2領域と、
前記第1領域及び前記第2領域を取り囲む多面体形状の車体カバーと、
を備え、
前記車体カバーにおいて、前記第1領域に空気を導入するための第1吸気口が形成される面の向きは、前記第2領域から空気を導き出すための第2排気口が形成される面の向きと異なる、
作業機械。 - 前記車体カバーにおいて、前記第1領域から空気を導き出すための第1排気口が形成される面の向きは、前記第2領域に空気を導入するための第2吸気口が形成される面の向きと異なる、
請求項1に記載の作業機械。 - 前記車体カバーにおいて、前記第1吸気口が形成される面は、前記第2排気口が形成される面の反対側に位置する、
請求項1又は2に記載の作業機械。 - 前記第1領域には、前記作業機に供給される作動油及び空調装置に供給される冷媒の少なくとも一方を冷却する冷却ユニットが配置され、
前記冷却ユニットは、前記第1領域内を空気が流れる方向において、前記バッテリ装置の下流側に配置される、
請求項1に記載の作業機械。 - 前記車体カバーの前方に配置されるキャブを更に備え、
前記第2排気口が形成される面は、前記車体カバーの前面であり、
前面視において、前記第2排気口の少なくとも一部は、前記キャブから離れている、
請求項1に記載の作業機械。 - 前記バッテリ装置の電力で駆動する電動モータと、
前記電動モータによって駆動される油圧ポンプが配置される第3領域と、
前記第1領域と前記第3領域を仕切る第1仕切り板と、
を更に備える、
請求項1に記載の作業機械。 - 前記第1領域と前記第2領域を仕切る第2仕切り板を更に備える、
請求項1に記載の作業機械。 - 整流部材を更に備え、
前記バッテリ熱管理システムは、空気を排出するための排出口を有し、
前記整流部材は、前記バッテリ熱管理システムの前記排出口から排出される空気を、前記車体カバーの前記第2排気口に導く、
請求項1に記載の作業機械。
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2011149157A (ja) * | 2010-01-19 | 2011-08-04 | Hitachi Constr Mach Co Ltd | 建設機械の冷却構造 |
JP2016030923A (ja) * | 2014-07-28 | 2016-03-07 | 日立建機株式会社 | ハイブリッド式作業機 |
JP2019056236A (ja) * | 2017-09-21 | 2019-04-11 | 日立建機株式会社 | ハイブリッド式作業機械 |
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JP5814577B2 (ja) | 2011-03-24 | 2015-11-17 | 株式会社小松製作所 | 電動式作業車両及びそのバッテリ保持構造 |
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JP2011149157A (ja) * | 2010-01-19 | 2011-08-04 | Hitachi Constr Mach Co Ltd | 建設機械の冷却構造 |
JP2016030923A (ja) * | 2014-07-28 | 2016-03-07 | 日立建機株式会社 | ハイブリッド式作業機 |
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