WO2021020168A1 - Driving device and mount for construction machine - Google Patents

Driving device and mount for construction machine Download PDF

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Publication number
WO2021020168A1
WO2021020168A1 PCT/JP2020/027824 JP2020027824W WO2021020168A1 WO 2021020168 A1 WO2021020168 A1 WO 2021020168A1 JP 2020027824 W JP2020027824 W JP 2020027824W WO 2021020168 A1 WO2021020168 A1 WO 2021020168A1
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WIPO (PCT)
Prior art keywords
engine
exhaust gas
mounting surface
top plate
gas treatment
Prior art date
Application number
PCT/JP2020/027824
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French (fr)
Japanese (ja)
Inventor
裕哉 森
翔汰 臼本
寛明 垰
健太 倉内
Original Assignee
コベルコ建機株式会社
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Application filed by コベルコ建機株式会社 filed Critical コベルコ建機株式会社
Publication of WO2021020168A1 publication Critical patent/WO2021020168A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
    • 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
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • 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

Definitions

  • the present invention relates to a drive device and a gantry for construction machinery.
  • an exhaust gas treatment device is generally installed in the exhaust system of the engine.
  • the conventional exhaust gas treatment device is integrally attached to the engine in the engine chamber.
  • a fan is provided in the engine chamber, and the fan generates cooling air to cool the engine.
  • the size and weight of the exhaust gas treatment device have increased in response to the recent tightening of exhaust gas regulations, which makes it difficult to integrally attach the exhaust gas treatment device to the engine. Further, the exhaust gas treatment device which is increased in size and provided on the downstream side of the engine prevents the cooling air from being satisfactorily discharged from the engine chamber.
  • Patent Document 1 an exhaust gas treatment device is provided in the house frame of a hydraulic excavator having an upper swivel body having a house frame, and a flow of cooling air regardless of the exhaust gas treatment device in the house frame. It is described that the air duct is formed, which makes it possible to secure.
  • the exhaust pipe path connecting the engine and the exhaust gas treatment device becomes longer, the exhaust temperature decreases and the denitration reaction efficiency of the selective catalytic reduction denitration device (SCR) decreases.
  • SCR selective catalytic reduction denitration device
  • the present invention is a drive device for a construction machine provided with an engine and an exhaust gas treatment device, which can keep the distance between the engine and the exhaust gas treatment device small and can effectively cool them, and the present invention. It is an object of the present invention to provide a gantry for supporting an exhaust gas treatment device.
  • a drive device for a construction machine an engine, a fan that generates cooling air for cooling the engine, an exhaust gas treatment device that processes the exhaust gas of the engine, and the exhaust gas. It comprises a pedestal that supports the treatment device at a position above the engine and in a coolable position that allows the cooling air to pass through at least a portion of the exhaust gas treatment device.
  • an engine an exhaust gas treatment device for treating the exhaust gas of the engine, and a cooling system including a cooling medium tank for cooling the engine with a cooling medium.
  • a frame for supporting the exhaust gas treatment device and the cooling medium tank, and a plurality of legs supporting the top plate and the top plate so as to form a space for accommodating the engine below the top plate.
  • the top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface. It includes a second mounting portion on which the cooling medium tank is mounted on the second mounting surface.
  • the first mounting portion is provided with a first through hole that penetrates the first mounting portion in the vertical direction, and the second mounting portion has a second that penetrates the second mounting portion in the vertical direction.
  • the first mounting surface is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine.
  • the second mounting surface is a position higher than the first height position, and the cooling medium tank mounted on the second mounting surface is positioned at the highest position in the cooling system. It is at 2 heights.
  • FIG. 1 is a plan view of a crane, which is a construction machine provided with a drive device according to an embodiment of the present invention.
  • FIG. 2 is a side view of the crane.
  • FIG. 3 is a side view showing an exterior cover included in the drive device.
  • FIG. 4 is a perspective view showing the elements of the drive device inside the exterior cover.
  • FIG. 5 is a side view showing the elements of the drive device inside the exterior cover.
  • FIG. 6 is a perspective view showing a frame included in the drive device.
  • FIGS. 4 and 5 show a drive device provided in the crane 1.
  • the drive device includes an engine 9, a fan 16 that generates cooling air 17 for cooling the engine 9, and an exhaust gas that processes exhaust gas discharged from the engine 9. It includes a gas treatment device 10, a cooling system for cooling the engine 9 with cooling water as a cooling medium, and a pedestal 20 for supporting the exhaust gas treatment device 10 at a position above the engine 9.
  • the gantry 20 supports the exhaust gas treatment device 10 at a position where the cooling air 17 can pass at least a part of the exhaust gas treatment device 10.
  • the gantry 20 includes a top plate 21 and a plurality of (four in this embodiment) legs 22 that support the top plate 21. The plurality of legs 22 support the top plate 21 so that a space for accommodating the engine 9 is formed below the top plate 21.
  • the top plate 21 has a first mounting portion 23 and a second mounting portion 24.
  • the first and second mounting portions 23 and 24 are aligned horizontally with each other, and in this embodiment, in the direction in which the fan 16 and the engine 9 are aligned, that is, in a direction parallel to the axial direction of the engine 9. line up.
  • the first mounting portion 23 has a first mounting surface 23a, which is the upper surface thereof, and the exhaust gas treatment device 10 is mounted on the first mounting surface 23a via a support member (not shown).
  • the second mounting portion 24 has a second mounting surface 24a which is the upper surface thereof, and the device attached to the engine 9 on the second mounting surface 24a, the intake device 14 and the intake device 14 in this embodiment.
  • the cooling water tank 15 is placed via a support member (not shown).
  • the first mounting portion 23 is provided with a first through hole 25 that penetrates the first mounting portion 23 in the vertical direction, and the second mounting portion 24 is provided with the second mounting portion 24 in the vertical direction.
  • a second through hole 26 is provided through the hole 26.
  • the first mounting surface 23a is at a first height position such that the exhaust gas treatment device 10 mounted on the first mounting surface 23a is brought close to the engine 9.
  • the first height position is a coolable position that allows the cooling air 17 to pass through at least a part of the exhaust gas treatment device 10.
  • the second mounting surface 24a is at a second height position higher than the first height position.
  • the second height position is a position where the equipment mounted on the second mounting surface 24a, that is, the intake device 14 and the cooling water tank 15, are separated from the engine 9.
  • the crane 1 includes a self-propelled crawler-type lower traveling body 2, an upper rotating body 30 provided on the lower traveling body 2 so as to be able to turn horizontally, and the upper turning body 2.
  • a boom 3 is provided on the body 30 so as to be rotatable in the vertical direction.
  • the upper swivel body 30 includes a cab 4 and an exterior cover 5.
  • a driver's seat (not shown) is provided inside the cab 4.
  • the exterior cover 5 covers a plurality of elements, and the plurality of elements are an engine 9, a hydraulic oil tank 6, a power divider 7 for dividing the power generated by the engine 9, and a hydraulic oil tank 6.
  • a hydraulic pump (not shown) that pressurizes and discharges the hydraulic oil inside, an exhaust gas treatment device 10 that processes the exhaust gas from the engine 9, a radiator 11 that is a heat exchanger for cooling the engine 9, and a gantry 20. including.
  • FIG. 2 is a side view of the crane 1.
  • the engine 9 is arranged in the space formed below the top plate 21 in the gantry 20, and the exhaust gas treatment device 10 is above the engine 9 by the gantry 20. Supported in position.
  • the gantry 20 enables the exhaust gas treatment device 10 to be arranged at a position above the engine 9, thereby effectively utilizing the space inside the exterior cover 5. It is possible to arrange the exhaust gas treatment device 10 at a position close to the engine 9. Further, by giving the gantry 20 high strength, it is possible to cope with the weight increase of the exhaust gas treatment device 10.
  • the exterior cover 5 protects the plurality of elements including the engine 9 by covering them.
  • the exterior cover 5 has an upper end portion provided with an exhaust opening 12.
  • the exhaust opening 12 is provided at the upper end of the top wall or side wall of the exterior cover 5 and communicates the inside and the outside of the exterior cover 5 with each other.
  • the exterior cover 5 has a box shape that is open downward.
  • the plurality of legs 22 of the gantry 20 are arranged so as to allow the engine 9 to be housed below the top plate 21.
  • the exhaust gas treatment device 10 has an exhaust pipe 13 and discharges the treated exhaust gas to the outside of the exterior cover 5 through the exhaust pipe 13.
  • the second mounting surface 24a of the top plate 21 is higher than the first mounting surface 23a.
  • the exhaust gas treatment device 10 for treating the gas discharged from the engine 9 as described above is arranged close to the engine 9. This is because the longer the exhaust pipe path connecting the engine 9 and the exhaust gas treatment device 10, the lower the temperature of the exhaust gas reaching the exhaust gas treatment device 10, and the selective catalytic reduction contained in the exhaust gas treatment device 10. This is because the reduction efficiency of the denitration device (SCR) is reduced.
  • SCR denitration device
  • the engine 9 is arranged below the top plate 21, it can be connected to the intake device 14 and the cooling water tank 15 mounted on the second mounting portion 24. is there. Specifically, the second through hole 26 formed in the second mounting portion 24 reaches the intake flow path 27 from the intake device 14 to the engine 9 and the cooling water tank 15 to the engine 9. The cooling water flow path 28 is allowed to pass through the second through hole 26.
  • the second through hole 26 enables sub-assembly of a plurality of devices on the top plate 21 in advance, and then the plurality of devices and the gantry 20 can be combined and assembled in the vicinity of the engine 9. To do. This makes it possible to improve the assembling property and the machine production efficiency as compared with the case where the plurality of devices and the gantry 20 are individually mounted on the upper swing body 30.
  • At least one of the intake device 14 and the cooling water tank 15 is mounted on the second mounting portion 24.
  • only one of the intake device 14 and the cooling water tank 15 may be mounted on the second mounting portion 24.
  • one of the devices is connected to the engine 9, and the second through hole 26 is the flow path connected to the one of the intake flow path 27 and the cooling water flow path 28. It suffices to have a shape that allows the passage through the second through hole 26.
  • the height position of the second mounting surface 24a is the cooling of the cooling water tank 15 mounted on the second mounting surface 24a including the cooling water tank 15. It is preferably a height position that is positioned at the highest position in the system. This makes it possible to easily bleed air from the cooling system and to easily secure the suction pressure of the cooling water pump included in the cooling system.
  • the cooling system is an assembly of a plurality of devices for cooling the engine 9 by a cooling medium, cooling water in this embodiment, and circulates the cooling water tank 15 for accommodating the cooling water and the cooling water.
  • the cooling water flow path 28 for the purpose and the cooling water pump for flowing cooling water through the cooling water flow path 28 are included at least.
  • the cooling system further preferably includes the radiator 11 that causes heat exchange between the cooling water and the cooling air 17.
  • the fact that the second mounting surface 24a is higher than the first mounting surface 23a means that the exhaust gas treatment device 10 mounted on the first mounting surface 23a is brought close to the engine 9 and the first mounting surface 23a is placed close to the engine 9. 2 It is possible to separate the intake device 14 and the cooling water tank 15 mounted on the mounting surface 24a upward from the engine 9.
  • the fan 16 is driven by the engine 9. That is, the fan 16 according to the present embodiment is driven by the engine 9 as a power source.
  • the present invention is not limited to this.
  • the fan 16 may be driven by a power source that uses oil or electricity other than the engine 9.
  • the fan 16 is driven by such a power source to allow outside air to enter the exterior cover 5 through a gap (not shown) between the exterior cover 5 and the floor or an intake opening (not shown) provided in the exterior cover 5. Takes in, thereby forming the cooling air 17.
  • the cooling air 17 generated by the fan 16 cools the engine 9, and further passes through the first through hole 25 to the exhaust gas treatment device 10 and instrumentation attached thereto.
  • the part 18 is cooled.
  • the first through hole 25 is arranged at a position that allows the cooling air 17 to flow from the fan 16 to the exhaust opening 12 through the first through hole 25.
  • the materials constituting the top plate 21 and the legs 22 are not particularly limited. However, in order to support the exhaust gas treatment device 10 and the like having a large weight, those having high strength such as a steel material are preferable.
  • the top plate 21 shown in FIG. 6 is composed of a plurality of plate-shaped members that are overlapped with each other, which enables the gantry 20 to have high strength.
  • the fan 16 is driven by the engine 9, which takes in air inside the exterior cover 5 to generate cooling air 17.
  • the cooling air 17 cools the engine 9 installed below the top plate 21 of the gantry 20.
  • the cooling air 17 further reaches above the top plate 21 through the first through hole 25 provided in the first mounting portion 23 of the top plate 21, and is provided on the exterior cover 5. It is exhausted to the outside through the exhaust opening 12.
  • the cooling air 17 may pass through at least a part of the exhaust gas treatment device 10 mounted on the first mounting surface 23a of the first mounting section 23 and the instrumentation section 18. It is possible, and thus the exhaust gas treatment device 10 and the instrumentation unit 18 can be cooled.
  • the drive device and construction of a construction machine having a mechanism for cooling the exhaust gas treatment device and the like after mounting the exhaust gas treatment device while dealing with the problem of the weight of the exhaust gas treatment device.
  • a gantry for supporting the exhaust gas treatment device of the machine can be provided.
  • a drive device for a construction machine equipped with an engine and an exhaust gas treatment device which can keep the distance between the engine and the exhaust gas treatment device small and can effectively cool them, and A gantry for supporting the exhaust gas treatment device is provided.
  • a drive device for a construction machine an engine, a fan that generates cooling air for cooling the engine, an exhaust gas treatment device that processes the exhaust gas of the engine, and the exhaust gas. It comprises a pedestal that supports the treatment device at a position above the engine and in a coolable position that allows the cooling air to pass through at least a portion of the exhaust gas treatment device.
  • the gantry By supporting the exhaust gas treatment device at a position above the engine, the gantry makes it possible to arrange the exhaust gas treatment device by utilizing the space above the engine. That is, the gantry allows the heavy weight exhaust gas treatment device to be placed above the engine rather than being supported by the engine. Further, the gantry utilizes the cooling air by supporting the exhaust gas processing device at a cooling position that allows the cooling air to pass through at least a part of the exhaust gas processing device. Allows the exhaust gas treatment equipment to be cooled. This prevents heat from being trapped in the exhaust gas treatment device and the equipment attached thereto, for example, the instrumentation unit including the sensor and the controller.
  • the drive device further includes an exterior cover that covers the entire engine, the exhaust gas treatment device, and the gantry, and the exterior cover has an upper end portion in which an exhaust opening is formed, and the gantry is provided.
  • the engine and the fan are arranged in the space below the top plate, and the top plate is formed with a first through hole that penetrates the top plate in the vertical direction. It is preferable that the first through hole is at a position that allows the cooling air to flow from the fan to the exhaust opening through the first through hole.
  • the first through hole cools the engine arranged below the top plate by allowing the cooling air of the fan to be discharged from the exhaust opening through the first through hole.
  • the cooling air makes it possible to further cool the exhaust gas treatment device on the top plate.
  • the drive device further includes an intake device connected to the engine, and a second through hole that penetrates the top plate in the vertical direction is formed in the top plate, and the second through hole is formed from the intake device. It is preferable that the intake flow path leading to the engine is passed through.
  • the second through hole that allows the insertion of the intake flow path in this way enables the intake device to be connected to the engine even after the exhaust gas treatment device is placed on the top plate. ..
  • the drive device further includes a cooling medium tank connected to the engine, and the top plate is formed with a second through hole that penetrates the top plate in the vertical direction, and the cooling water tank is formed in the second through hole. It is preferable that the cooling water flow path from the engine to the engine is passed through.
  • the second through hole that allows the cooling water flow path to be inserted in this way enables the cooling water tank to be connected to the engine even after the exhaust gas treatment device is mounted on the top plate. ..
  • Both the cooling water flow path and the intake flow path may be passed through the second through hole.
  • the top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface.
  • a second mounting portion on which the cooling water tank is mounted is provided on the second mounting surface, the first through hole is provided in the first mounting portion, and the second through hole is the above.
  • the first mounting surface provided in the second mounting portion is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine.
  • the second mounting surface is higher than the first height position, and the cooling water tank mounted on the second mounting surface is at the highest position in the cooling system including the cooling medium tank. It is preferably in the second height position.
  • the top plate having the first and second mounting surfaces having different heights as described above is the exhaust gas treatment device and the exhaust gas treatment device mounted on the first mounting surface at a relatively low position.
  • the exhaust pipe path connecting to the engine is shortened to suppress a decrease in the temperature of the exhaust gas introduced into the exhaust gas treatment device, and the exhaust gas is placed on the second mounting surface at a relatively high position.
  • the cooling water tank is positioned at the highest position in the cooling system so that the suction pressure of the cooling medium pump included in the cooling system can be easily secured.
  • an engine an exhaust gas treatment device for treating the exhaust gas of the engine, and a cooling system including a cooling medium tank connected to the engine to cool the engine with a cooling medium. It is a stand for supporting the exhaust gas treatment device and the cooling medium tank of the construction machine provided, and the top plate is provided so as to form a top plate and a space for accommodating the engine below the top plate. It is provided with a plurality of supporting legs.
  • the top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface. It includes a second mounting portion on which the cooling medium tank is mounted on the second mounting surface.
  • the first mounting portion is provided with a first through hole that penetrates the first mounting portion in the vertical direction, and the second mounting portion has a second that penetrates the second mounting portion in the vertical direction.
  • a through hole is provided.
  • the first mounting surface is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine.
  • the second mounting surface is a position higher than the first height position, and the cooling medium tank mounted on the second mounting surface is positioned at the highest position in the cooling system. It is at 2 heights.
  • the gantry By forming a space below the top plate for accommodating the engine, the gantry utilizes the space above the engine without supporting the exhaust gas treatment device having a large weight by the engine. Allows for placement. Further, in the first through hole provided in the first mounting portion of the top plate, the cooling air supplied to the engine below the top plate passes through the first through hole in the first mounting surface. It is possible to pass through the exhaust gas treatment device mounted on the above, thereby cooling the exhaust gas treatment device by utilizing the cooling air.
  • the cooling system is an assembly of a plurality of devices for cooling the engine with a cooling medium, the cooling medium tank for accommodating the cooling medium, the cooling medium flow path for circulating the cooling medium, and the cooling medium flow path.
  • a cooling medium pump for flowing the cooling medium through the cooling medium flow path is included.
  • the cooling system may further include, for example, a radiator, a thermostat, etc. that allow heat exchange between the cooling medium and the cooling air.

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

Abstract

Provided are a driving device and a mount for a construction machine. The driving device is provided with: an engine; a fan that generates cooling wind for cooling the engine; an exhaust gas processing device that processes an exhaust gas from the engine; and a mount that supports the exhaust gas processing device above the engine. The mount supports the exhaust gas processing device in a coolable position in which the cooling wind can pass through at least a part of the exhaust gas processing device.

Description

建設機械の駆動装置及び架台Drives and mounts for construction machinery
　本発明は、建設機械の駆動装置及び架台に関する。 The present invention relates to a drive device and a gantry for construction machinery.
　油圧ショベルなどの建設機械にディーゼルエンジン（以下、エンジンという）が採用される場合、エンジンの排気系には排気ガス処理装置が設置されるのが一般的である。従来の排気ガス処理装置は、エンジン室内においてエンジンに一体的に取り付けられる。当該エンジン室内にはファンが設けられ、このファンは冷却風を生成して上記エンジンを冷却する。 When a diesel engine (hereinafter referred to as an engine) is adopted for construction machinery such as a hydraulic excavator, an exhaust gas treatment device is generally installed in the exhaust system of the engine. The conventional exhaust gas treatment device is integrally attached to the engine in the engine chamber. A fan is provided in the engine chamber, and the fan generates cooling air to cool the engine.
　しかし、近年の排気ガス規制強化に対応して排気ガス処理装置の寸法及び重量が増大し、これにより、排気ガス処理装置をエンジンに一体的に取り付けることは困難となっている。また、このように大型化してエンジンの下流側に設けられる排気ガス処理装置は、エンジン室から良好に冷却風が排出されることを妨げる。 However, the size and weight of the exhaust gas treatment device have increased in response to the recent tightening of exhaust gas regulations, which makes it difficult to integrally attach the exhaust gas treatment device to the engine. Further, the exhaust gas treatment device which is increased in size and provided on the downstream side of the engine prevents the cooling air from being satisfactorily discharged from the engine chamber.
　特許文献１は、ハウスフレームを有する上部旋回体を備えた油圧ショベルの当該ハウスフレームに排気ガス処理装置を配設すること、及び、このハウスフレーム内の排気ガス処理装置にかかわらず冷却風の流れを確保することを可能にする導風路を形成すること、が記載されている。 In Patent Document 1, an exhaust gas treatment device is provided in the house frame of a hydraulic excavator having an upper swivel body having a house frame, and a flow of cooling air regardless of the exhaust gas treatment device in the house frame. It is described that the air duct is formed, which makes it possible to secure.
　しかし、エンジンの下流側にパワーディバイダなどの装置が設置されている建設機械、例えばクレーン、では、上記特許文献１に記載されるようなハウスフレームのためのスペース、つまり排気ガス処理装置を設置するためのスペース、を取ることが難しい。 However, in a construction machine in which a device such as a power divider is installed on the downstream side of the engine, for example, a crane, a space for a house frame as described in Patent Document 1, that is, an exhaust gas treatment device is installed. Space for, difficult to take.
　また、エンジンと排気ガス処理装置とを接続する排気管経路が長くなるのに伴って排気温度が下がり選択触媒還元脱硝装置（ＳＣＲ）の脱硝反応効率が低下する。
  Further, as the exhaust pipe path connecting the engine and the exhaust gas treatment device becomes longer, the exhaust temperature decreases and the denitration reaction efficiency of the selective catalytic reduction denitration device (SCR) decreases.
特開２０１４－１４８８５８号公報Japanese Unexamined Patent Publication No. 2014-148858
　本発明は、エンジン及び排気ガス処理装置を備えた建設機械の駆動装置であって、上記エンジンと上記排気ガス処理装置との距離を小さく抑えかつこれらの有効な冷却が可能であるもの、及び当該排気ガス処理装置を支持するための架台を提供することを目的とする。 The present invention is a drive device for a construction machine provided with an engine and an exhaust gas treatment device, which can keep the distance between the engine and the exhaust gas treatment device small and can effectively cool them, and the present invention. It is an object of the present invention to provide a gantry for supporting an exhaust gas treatment device.
　提供されるのは、建設機械の駆動装置であって、エンジンと、上記エンジンを冷却するための冷却風を生成するファンと、上記エンジンの排気ガスを処理する排気ガス処理装置と、上記排気ガス処理装置を上記エンジンの上方の位置であって上記冷却風が上記排気ガス処理装置の少なくとも一部を通過することを可能にする冷却可能位置に支持する架台と、を備える。 Provided are a drive device for a construction machine, an engine, a fan that generates cooling air for cooling the engine, an exhaust gas treatment device that processes the exhaust gas of the engine, and the exhaust gas. It comprises a pedestal that supports the treatment device at a position above the engine and in a coolable position that allows the cooling air to pass through at least a portion of the exhaust gas treatment device.
　また、提供されるのは、エンジンと、上記エンジンの排気ガスを処理する排気ガス処理装置と、冷却媒体タンクを含んで上記エンジンを冷却媒体により冷却する冷却系統と、を備えた建設機械の上記排気ガス処理装置及び上記冷却媒体タンクを支持するための架台であって、天板と、上記天板の下方に上記エンジンを収容するスペースを形成するように上記天板を支持する複数の脚部と、を備える。上記天板は、第１載置面を有して当該第１載置面の上に上記排気ガス処理装置が載置される第１載置部と、第２載置面を有して当該第２載置面の上に上記冷却媒体タンクが載置される第２載置部と、を含む。上記第１載置部には当該第１載置部を上下方向に貫通する第１貫通孔が設けられ、上記第２載置部には当該第２載置部を上下方向に貫通する第２貫通孔が設けられる。上記第１載置面は、当該第１載置面の上に載置される上記排気ガス処理装置を上記エンジンに近接させる第１高さ位置にある。上記第２載置面は、上記第１高さ位置よりも高い位置であって上記第２載置面の上に載置される上記冷却媒体タンクを上記冷却系統における最上の位置に位置させる第２高さ位置にある。 Also provided is an engine, an exhaust gas treatment device for treating the exhaust gas of the engine, and a cooling system including a cooling medium tank for cooling the engine with a cooling medium. A frame for supporting the exhaust gas treatment device and the cooling medium tank, and a plurality of legs supporting the top plate and the top plate so as to form a space for accommodating the engine below the top plate. And. The top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface. It includes a second mounting portion on which the cooling medium tank is mounted on the second mounting surface. The first mounting portion is provided with a first through hole that penetrates the first mounting portion in the vertical direction, and the second mounting portion has a second that penetrates the second mounting portion in the vertical direction. A through hole is provided. The first mounting surface is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine. The second mounting surface is a position higher than the first height position, and the cooling medium tank mounted on the second mounting surface is positioned at the highest position in the cooling system. It is at 2 heights.
図１は、本発明の一実施形態に係る駆動装置を備えた建設機械であるクレーンの平面図である。FIG. 1 is a plan view of a crane, which is a construction machine provided with a drive device according to an embodiment of the present invention. 図２は、上記クレーンの側面図である。FIG. 2 is a side view of the crane. 図３は、上記駆動装置に含まれる外装カバーを示す側面図である。FIG. 3 is a side view showing an exterior cover included in the drive device. 図４は、上記外装カバーの内部における上記駆動装置の要素を示す斜視図である。FIG. 4 is a perspective view showing the elements of the drive device inside the exterior cover. 図５は、上記外装カバーの内部における上記駆動装置の要素を示す側面図である。FIG. 5 is a side view showing the elements of the drive device inside the exterior cover. 図６は、上記駆動装置に含まれる架台を示す斜視図である。FIG. 6 is a perspective view showing a frame included in the drive device.
　以下、適宜図面を参照しつつ、本発明の実施の形態を詳説する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
　図１及び図２は、上記実施の形態に係る建設機械であるクレーン１を示し、図４及び図５は上記クレーン１に設けられる駆動装置を示す。 1 and 2 show a crane 1 which is a construction machine according to the above embodiment, and FIGS. 4 and 5 show a drive device provided in the crane 1.
　図４及び図５に示すように、上記駆動装置は、エンジン９と、当該エンジン９を冷却するための冷却風１７を生成するファン１６と、上記エンジン９から排出される排気ガスを処理する排気ガス処理装置１０と、上記エンジン９を冷却媒体である冷却水により冷却する冷却系統と、上記排気ガス処理装置１０を上記エンジン９の上方の位置に支持する架台２０と、を備える。上記架台２０は、上記冷却風１７が上記排気ガス処理装置１０の少なくとも一部を通過することが可能となる位置に当該排気ガス処理装置１０を支持する。図６に示すように、上記架台２０は、天板２１と、上記天板２１を支持する複数の（この実施の形態では４本の）脚部２２と、を備える。上記複数の脚部２２は、上記天板２１の下方に上記エンジン９を収容するためのスペースが形成されるように上記天板２１を支持する。 As shown in FIGS. 4 and 5, the drive device includes an engine 9, a fan 16 that generates cooling air 17 for cooling the engine 9, and an exhaust gas that processes exhaust gas discharged from the engine 9. It includes a gas treatment device 10, a cooling system for cooling the engine 9 with cooling water as a cooling medium, and a pedestal 20 for supporting the exhaust gas treatment device 10 at a position above the engine 9. The gantry 20 supports the exhaust gas treatment device 10 at a position where the cooling air 17 can pass at least a part of the exhaust gas treatment device 10. As shown in FIG. 6, the gantry 20 includes a top plate 21 and a plurality of (four in this embodiment) legs 22 that support the top plate 21. The plurality of legs 22 support the top plate 21 so that a space for accommodating the engine 9 is formed below the top plate 21.
　上記天板２１は、第１載置部２３と第２載置部２４とを有する。上記第１及び第２載置部２３，２４は互いに水平方向に並び、この実施の形態では、上記ファン１６と上記エンジン９とが並ぶ方向、すなわち上記エンジン９の軸方向、と平行な方向に並ぶ。上記第１載置部２３は、その上面である第１載置面２３ａを有し、当該第１載置面２３ａの上に図示されない支持部材を介して上記排気ガス処理装置１０が載置される。上記第２載置部２４は、その上面である第２載置面２４ａを有し、当該第２載置面２４ａの上に上記エンジン９に付属する機器、この実施の形態では吸気装置１４及び冷却水タンク１５、が図示されない支持部材を介して載置される。上記第１載置部２３には当該第１載置部２３を上下方向に貫通する第１貫通孔２５が設けられ、上記第２載置部２４には当該第２載置部２４を上下方向に貫通する第２貫通孔２６が設けられている。 The top plate 21 has a first mounting portion 23 and a second mounting portion 24. The first and second mounting portions 23 and 24 are aligned horizontally with each other, and in this embodiment, in the direction in which the fan 16 and the engine 9 are aligned, that is, in a direction parallel to the axial direction of the engine 9. line up. The first mounting portion 23 has a first mounting surface 23a, which is the upper surface thereof, and the exhaust gas treatment device 10 is mounted on the first mounting surface 23a via a support member (not shown). To. The second mounting portion 24 has a second mounting surface 24a which is the upper surface thereof, and the device attached to the engine 9 on the second mounting surface 24a, the intake device 14 and the intake device 14 in this embodiment. The cooling water tank 15 is placed via a support member (not shown). The first mounting portion 23 is provided with a first through hole 25 that penetrates the first mounting portion 23 in the vertical direction, and the second mounting portion 24 is provided with the second mounting portion 24 in the vertical direction. A second through hole 26 is provided through the hole 26.
　上記第１載置面２３ａは、その上に載置される上記排気ガス処理装置１０を上記エンジン９に近接させるような第１高さ位置にある。当該第１高さ位置は、さらに、上記排気ガス処理装置１０の少なくとも一部を上記冷却風１７が通過することを可能にする冷却可能位置である。上記第２載置面２４ａは、上記第１高さ位置よりも高い第２高さ位置にある。当該第２高さ位置は、上記第２載置面２４ａの上に載置される上記機器、すなわち上記吸気装置１４及び上記冷却水タンク１５、を上記エンジン９から離隔する位置である。 The first mounting surface 23a is at a first height position such that the exhaust gas treatment device 10 mounted on the first mounting surface 23a is brought close to the engine 9. The first height position is a coolable position that allows the cooling air 17 to pass through at least a part of the exhaust gas treatment device 10. The second mounting surface 24a is at a second height position higher than the first height position. The second height position is a position where the equipment mounted on the second mounting surface 24a, that is, the intake device 14 and the cooling water tank 15, are separated from the engine 9.
　図１に示すように、上記クレーン１は、自走可能なクローラ式の下部走行体２と、この下部走行体２上に水平方向に旋回可能に設けられた上部旋回体３０と、上記上部旋回体３０に上下方向に回動可能に設けられたブーム３と、を備える。上記上部旋回体３０はキャブ４及び外装カバー５を含む。上記キャブ４の内部には図示されない運転席が設けられている。上記外装カバー５は、複数の要素を覆い、当該複数の要素は、動力源である上記エンジン９、作動油タンク６、上記エンジン９が生成する動力を分割するパワーディバイダ７、上記作動油タンク６内の作動油を加圧して吐出する図示されない油圧ポンプ、上記エンジン９からの排気ガスを処理する排気ガス処理装置１０、上記エンジン９を冷却するための熱交換器であるラジエータ１１、及び架台２０を含む。 As shown in FIG. 1, the crane 1 includes a self-propelled crawler-type lower traveling body 2, an upper rotating body 30 provided on the lower traveling body 2 so as to be able to turn horizontally, and the upper turning body 2. A boom 3 is provided on the body 30 so as to be rotatable in the vertical direction. The upper swivel body 30 includes a cab 4 and an exterior cover 5. A driver's seat (not shown) is provided inside the cab 4. The exterior cover 5 covers a plurality of elements, and the plurality of elements are an engine 9, a hydraulic oil tank 6, a power divider 7 for dividing the power generated by the engine 9, and a hydraulic oil tank 6. A hydraulic pump (not shown) that pressurizes and discharges the hydraulic oil inside, an exhaust gas treatment device 10 that processes the exhaust gas from the engine 9, a radiator 11 that is a heat exchanger for cooling the engine 9, and a gantry 20. including.
　図２は、上記クレーン１の側面図である。図２に示すように、上記エンジン９は上記架台２０において上記天板２１の下方に形成された上記スペースに配置され、上記排気ガス処理装置１０は、上記架台２０によって、上記エンジン９の上方の位置に支持されている。このように、上記架台２０は、上記エンジン９の上方での位置に排気ガス処理装置１０が配置されるすことを可能にし、これにより、上記外装カバー５の内側の空間を有効に利用して上記エンジン９に近接する位置に上記排気ガス処理装置１０を配置することを可能にする。また、架台２０に高い強度を与えることにより、排気ガス処理装置１０の重量化にも対応することができる。 FIG. 2 is a side view of the crane 1. As shown in FIG. 2, the engine 9 is arranged in the space formed below the top plate 21 in the gantry 20, and the exhaust gas treatment device 10 is above the engine 9 by the gantry 20. Supported in position. In this way, the gantry 20 enables the exhaust gas treatment device 10 to be arranged at a position above the engine 9, thereby effectively utilizing the space inside the exterior cover 5. It is possible to arrange the exhaust gas treatment device 10 at a position close to the engine 9. Further, by giving the gantry 20 high strength, it is possible to cope with the weight increase of the exhaust gas treatment device 10.
　図３に示すように、上記外装カバー５は、上記エンジン９を含む上記複数の要素を覆うことによりこれらを保護する。上記外装カバー５は、排気用開口１２が設けられた上端部を有する。具体的に、上記排気用開口１２は、上記外装カバー５の天壁又は側壁の上端部に設けられて上記外装カバー５の内部と外部とを相互に連通する。上記外装カバー５は、下向きに開放された箱状をなす。 As shown in FIG. 3, the exterior cover 5 protects the plurality of elements including the engine 9 by covering them. The exterior cover 5 has an upper end portion provided with an exhaust opening 12. Specifically, the exhaust opening 12 is provided at the upper end of the top wall or side wall of the exterior cover 5 and communicates the inside and the outside of the exterior cover 5 with each other. The exterior cover 5 has a box shape that is open downward.
　図４に示すように、上記架台２０の上記複数の脚部２２は、上記エンジン９が上記天板２１の下方に収容されることを可能にするように配置されている。上記排気ガス処理装置１０は排気管１３を有し、処理した排気ガスを上記排気管１３を通じて上記外装カバー５の外部に放出する。上述のように、上記天板２１の上記第２載置面２４ａは上記第１載置面２３ａよりも高い。 As shown in FIG. 4, the plurality of legs 22 of the gantry 20 are arranged so as to allow the engine 9 to be housed below the top plate 21. The exhaust gas treatment device 10 has an exhaust pipe 13 and discharges the treated exhaust gas to the outside of the exterior cover 5 through the exhaust pipe 13. As described above, the second mounting surface 24a of the top plate 21 is higher than the first mounting surface 23a.
　上述のようにエンジン９から排出されるガスを処理する上記排気ガス処理装置１０は、上記エンジン９に近接して配置されることが好ましい。なぜなら、上記エンジン９と上記排気ガス処理装置１０とをつなぐ排気管経路が長いほど上記排気ガス処理装置１０に到達する排気ガスの温度が低下し、上記排気ガス処理装置１０に含まれる選択触媒還元脱硝装置（ＳＣＲ）の還元効率が低下するからである。 It is preferable that the exhaust gas treatment device 10 for treating the gas discharged from the engine 9 as described above is arranged close to the engine 9. This is because the longer the exhaust pipe path connecting the engine 9 and the exhaust gas treatment device 10, the lower the temperature of the exhaust gas reaching the exhaust gas treatment device 10, and the selective catalytic reduction contained in the exhaust gas treatment device 10. This is because the reduction efficiency of the denitration device (SCR) is reduced.
　上記エンジン９は、上記天板２１の下方に配置されるにもかかわらず、上記第２載置部２４に載置される上記吸気装置１４及び上記冷却水タンク１５に接続されることが可能である。具体的に、上記第２載置部２４に形成されている上記第２貫通孔２６は、上記吸気装置１４から上記エンジン９に至る吸気流路２７及び上記冷却水タンク１５から上記エンジン９に至る冷却水流路２８が当該第２貫通孔２６を通ることを許容する。この第２貫通孔２６は、事前に上記天板２１上で複数の機器のサブ組み立てをし、その後に当該複数の機器と架台２０とを合わせて上記エンジン９の近傍に組付けることを可能にする。このことは、上記複数の機器及び上記架台２０を個別に上記上部旋回体３０に搭載する場合に比べて組み立て性及び機械生産効率を上げることを可能にする。 Although the engine 9 is arranged below the top plate 21, it can be connected to the intake device 14 and the cooling water tank 15 mounted on the second mounting portion 24. is there. Specifically, the second through hole 26 formed in the second mounting portion 24 reaches the intake flow path 27 from the intake device 14 to the engine 9 and the cooling water tank 15 to the engine 9. The cooling water flow path 28 is allowed to pass through the second through hole 26. The second through hole 26 enables sub-assembly of a plurality of devices on the top plate 21 in advance, and then the plurality of devices and the gantry 20 can be combined and assembled in the vicinity of the engine 9. To do. This makes it possible to improve the assembling property and the machine production efficiency as compared with the case where the plurality of devices and the gantry 20 are individually mounted on the upper swing body 30.
　上記第２載置部２４には、上記吸気装置１４及び上記冷却水タンク１５のうちの少なくとも一方の機器が載置されることが好ましい。換言すれば、上記第２載置部２４には上記吸気装置１４及び上記冷却水タンク１５のうちのいずれか一方の機器のみが載置されてもよい。この場合、当該一方の機器が上記エンジン９に接続されていればよく、上記第２貫通孔２６は、上記吸気流路２７及び上記冷却水流路２８のうち当該一方の機器につながる流路が当該第２貫通孔２６を通ることを許容する形状を有していればよい。 It is preferable that at least one of the intake device 14 and the cooling water tank 15 is mounted on the second mounting portion 24. In other words, only one of the intake device 14 and the cooling water tank 15 may be mounted on the second mounting portion 24. In this case, it is sufficient that one of the devices is connected to the engine 9, and the second through hole 26 is the flow path connected to the one of the intake flow path 27 and the cooling water flow path 28. It suffices to have a shape that allows the passage through the second through hole 26.
　上記第２載置面２４ａの高さ位置、すなわち上記第２高さ位置、は当該第２載置面２４ａの上に載置される上記冷却水タンク１５を当該冷却水タンク１５を含む上記冷却系統における最上の位置に位置させる高さ位置であることが好ましい。このことは、上記冷却系統からのエア抜きを容易にし、また当該冷却系統に含まれる冷却水ポンプの吸い込み圧力を容易に確保することを、可能にする。 The height position of the second mounting surface 24a, that is, the second height position is the cooling of the cooling water tank 15 mounted on the second mounting surface 24a including the cooling water tank 15. It is preferably a height position that is positioned at the highest position in the system. This makes it possible to easily bleed air from the cooling system and to easily secure the suction pressure of the cooling water pump included in the cooling system.
　上記冷却系統は、冷却媒体、この実施の形態では冷却水、によって上記エンジン９を冷却するための複数の機器の集合体であり、冷却水を収容する上記冷却水タンク１５、冷却水を循環させるための上記冷却水流路２８、当該冷却水流路２８に冷却水を流す上記冷却水ポンプを少なくとも含む。上記冷却系統は、さらに好ましくは、上記冷却水と上記冷却風１７との間で熱交換を行わせる上記ラジエータ１１を含む。 The cooling system is an assembly of a plurality of devices for cooling the engine 9 by a cooling medium, cooling water in this embodiment, and circulates the cooling water tank 15 for accommodating the cooling water and the cooling water. The cooling water flow path 28 for the purpose and the cooling water pump for flowing cooling water through the cooling water flow path 28 are included at least. The cooling system further preferably includes the radiator 11 that causes heat exchange between the cooling water and the cooling air 17.
　上記第２載置面２４ａが上記第１載置面２３ａよりも高いことは、当該第１載置面２３ａの上に載置された排気ガス処理装置１０を上記エンジン９に近接させながら上記第２載置面２４ａの上に載置された上記吸気装置１４及び上記冷却水タンク１５を上記エンジン９から上方に離隔させることを可能にする。 The fact that the second mounting surface 24a is higher than the first mounting surface 23a means that the exhaust gas treatment device 10 mounted on the first mounting surface 23a is brought close to the engine 9 and the first mounting surface 23a is placed close to the engine 9. 2 It is possible to separate the intake device 14 and the cooling water tank 15 mounted on the mounting surface 24a upward from the engine 9.
　上記ファン１６は、上記エンジン９により駆動される。すなわち、本実施形態に係る上記ファン１６は上記エンジン９を動力源として駆動される。しかし、本発明はこれに限定されない。例えば、上記ファン１６は上記エンジン９とは別の油圧や電気などを利用した動力源により駆動されてもよい。上記ファン１６は、このような動力源によって駆動されることにより、外装カバー５と床との隙間（図示しない）、あるいは外装カバー５に設けられた図示されない吸気開口を通じて外気を外装カバー５内に取り込み、これにより上記冷却風１７を形成する。 The fan 16 is driven by the engine 9. That is, the fan 16 according to the present embodiment is driven by the engine 9 as a power source. However, the present invention is not limited to this. For example, the fan 16 may be driven by a power source that uses oil or electricity other than the engine 9. The fan 16 is driven by such a power source to allow outside air to enter the exterior cover 5 through a gap (not shown) between the exterior cover 5 and the floor or an intake opening (not shown) provided in the exterior cover 5. Takes in, thereby forming the cooling air 17.
　図５に示すように、上記ファン１６により生成された冷却風１７は、上記エンジン９を冷却し、さらに上記第１貫通孔２５を通って上記排気ガス処理装置１０及びこれに添えられた計装部１８を冷却する。詳しくは、上記第１貫通孔２５は、当該第１貫通孔２５を通じて上記ファン１６から上記排気用開口１２に上記冷却風１７が流れることを許容する位置に配置されている。このように冷却風１７の通過を許容する第１貫通孔２５を有する第１載置部２３の第１載置面２３ａの上に上記排気ガス処理装置１０を載置することにより、上記冷却風１７を利用して上記排気ガス処理装置１０及び上記計装部１８を適切に冷却する機構を構築することができる。 As shown in FIG. 5, the cooling air 17 generated by the fan 16 cools the engine 9, and further passes through the first through hole 25 to the exhaust gas treatment device 10 and instrumentation attached thereto. The part 18 is cooled. Specifically, the first through hole 25 is arranged at a position that allows the cooling air 17 to flow from the fan 16 to the exhaust opening 12 through the first through hole 25. By mounting the exhaust gas treatment device 10 on the first mounting surface 23a of the first mounting portion 23 having the first through hole 25 that allows the cooling air 17 to pass through in this way, the cooling air 17 can be used to construct a mechanism for appropriately cooling the exhaust gas treatment device 10 and the instrumentation unit 18.
　図６に示される上記架台２０において、上記天板２１及び上記脚部２２を構成する材料は特に限定されない。しかし、大きな重量をもつ排気ガス処理装置１０その他を支持するためには鉄鋼材料などの高い強度を有するものが好ましい。図６に示される上記天板２１は、互いに重ね合わされる複数の板状部材により構成され、これにより、架台２０が高い強度を有することを可能にしている。 In the gantry 20 shown in FIG. 6, the materials constituting the top plate 21 and the legs 22 are not particularly limited. However, in order to support the exhaust gas treatment device 10 and the like having a large weight, those having high strength such as a steel material are preferable. The top plate 21 shown in FIG. 6 is composed of a plurality of plate-shaped members that are overlapped with each other, which enables the gantry 20 to have high strength.
　次に、上述のように構成された建設機械の駆動装置の動作を説明する。 Next, the operation of the drive device of the construction machine configured as described above will be described.
　まず、上記ファン１６が、上記エンジン９により駆動され、これにより上記外装カバー５の内側に空気を取り込んで冷却風１７を発生させる。上記冷却風１７は、上記架台２０の上記天板２１の下方に設置された上記エンジン９を冷却する。上記冷却風１７は、さらに、上記天板２１の上記第１載置部２３に設けられた第１貫通孔２５を通って上記天板２１の上方に至り、上記外装カバー５に設けられた上記排気用開口１２を通じて外部に排気される。このとき、上記冷却風１７は、上記第１載置部２３の上記第１載置面２３ａに載置された上記排気ガス処理装置１０の少なくとも一部及び上記計装部１８を通過することが可能であり、よって当該排気ガス処理装置１０及び当該計装部１８を冷却することができる。 First, the fan 16 is driven by the engine 9, which takes in air inside the exterior cover 5 to generate cooling air 17. The cooling air 17 cools the engine 9 installed below the top plate 21 of the gantry 20. The cooling air 17 further reaches above the top plate 21 through the first through hole 25 provided in the first mounting portion 23 of the top plate 21, and is provided on the exterior cover 5. It is exhausted to the outside through the exhaust opening 12. At this time, the cooling air 17 may pass through at least a part of the exhaust gas treatment device 10 mounted on the first mounting surface 23a of the first mounting section 23 and the instrumentation section 18. It is possible, and thus the exhaust gas treatment device 10 and the instrumentation unit 18 can be cooled.
　上述のような本実施形態によれば、排気ガス処理装置の重量の問題に対応し、かつ排気ガス処理装置搭載後の排気ガス処理装置などを冷却する機構を有した建設機械の駆動装置及び建設機械の排気ガス処理装置を支持するための架台を提供することができる。 According to the present embodiment as described above, the drive device and construction of a construction machine having a mechanism for cooling the exhaust gas treatment device and the like after mounting the exhaust gas treatment device while dealing with the problem of the weight of the exhaust gas treatment device. A gantry for supporting the exhaust gas treatment device of the machine can be provided.
　以上のように、エンジン及び排気ガス処理装置を備えた建設機械の駆動装置であって、上記エンジンと上記排気ガス処理装置との距離を小さく抑えかつこれらの有効な冷却が可能であるもの、及び当該排気ガス処理装置を支持するための架台が、提供される。 As described above, a drive device for a construction machine equipped with an engine and an exhaust gas treatment device, which can keep the distance between the engine and the exhaust gas treatment device small and can effectively cool them, and A gantry for supporting the exhaust gas treatment device is provided.
　提供されるのは、建設機械の駆動装置であって、エンジンと、上記エンジンを冷却するための冷却風を生成するファンと、上記エンジンの排気ガスを処理する排気ガス処理装置と、上記排気ガス処理装置を上記エンジンの上方の位置であって上記冷却風が上記排気ガス処理装置の少なくとも一部を通過することを可能にする冷却可能位置に支持する架台と、を備える。 Provided are a drive device for a construction machine, an engine, a fan that generates cooling air for cooling the engine, an exhaust gas treatment device that processes the exhaust gas of the engine, and the exhaust gas. It comprises a pedestal that supports the treatment device at a position above the engine and in a coolable position that allows the cooling air to pass through at least a portion of the exhaust gas treatment device.
　上記架台は、上記エンジンの上方の位置に上記排気ガス処理装置を支持することにより、当該エンジンの上方のスペースを活用して上記排気ガス処理装置を配置することを可能にする。すなわち、上記架台は、大きな重量をもつ上記排気ガス処理装置をエンジンに支持させるのではなく当該エンジンの上方に配置することを可能にする。また、上記架台は、上記冷却風が上記排気ガス処理装置の少なくとも一部を通過することを可能にする冷却可能位置に上記排気ガス処理装置を支持することにより、上記冷却風を利用して上記排気ガス処理装置を冷却することを可能にする。このことは、排気ガス処理装置及びこれに付属された機器、例えばセンサやコントローラを含む計装部、に熱が籠ることを防止する。 By supporting the exhaust gas treatment device at a position above the engine, the gantry makes it possible to arrange the exhaust gas treatment device by utilizing the space above the engine. That is, the gantry allows the heavy weight exhaust gas treatment device to be placed above the engine rather than being supported by the engine. Further, the gantry utilizes the cooling air by supporting the exhaust gas processing device at a cooling position that allows the cooling air to pass through at least a part of the exhaust gas processing device. Allows the exhaust gas treatment equipment to be cooled. This prevents heat from being trapped in the exhaust gas treatment device and the equipment attached thereto, for example, the instrumentation unit including the sensor and the controller.
　上記駆動装置は、上記エンジン、上記排気ガス処理装置及び上記架台の全体を覆う外装カバーをさらに備えており、上記外装カバーは、排気用開口が形成された上端部を有しており、上記架台は、載置面を有して上記載置面の上に上記排気ガス処理装置が載置される天板とこの天板の下方にスペースを形成するように上記天板を支持する複数の脚部とを有しており、上記エンジン及び上記ファンが、上記天板の下方の上記スペースに配置されており、上記天板には当該天板を上下方向に貫通する第１貫通孔が形成されていて当該第１貫通孔は当該第１貫通孔を通じて上記ファンから上記排気用開口に上記冷却風が流れることを許容する位置にあることが好ましい。上記第１貫通孔は、上記ファンの上記冷却風が当該第１貫通孔を通して上記排気用開口から放出されることを許容することにより、上記天板の下方に配置される上記エンジンを冷却した上記冷却風がさらに上記天板上の上記排気ガス処理装置を冷却することを可能にする。 The drive device further includes an exterior cover that covers the entire engine, the exhaust gas treatment device, and the gantry, and the exterior cover has an upper end portion in which an exhaust opening is formed, and the gantry is provided. Has a mounting surface and a top plate on which the exhaust gas treatment device is mounted on the mounting surface described above, and a plurality of legs supporting the top plate so as to form a space below the top plate. The engine and the fan are arranged in the space below the top plate, and the top plate is formed with a first through hole that penetrates the top plate in the vertical direction. It is preferable that the first through hole is at a position that allows the cooling air to flow from the fan to the exhaust opening through the first through hole. The first through hole cools the engine arranged below the top plate by allowing the cooling air of the fan to be discharged from the exhaust opening through the first through hole. The cooling air makes it possible to further cool the exhaust gas treatment device on the top plate.
　上記駆動装置は、上記エンジンに接続される吸気装置をさらに備え、上記天板には当該天板を上下方向に貫通する第２貫通孔が形成されて当該第２貫通孔に上記吸気装置から上記エンジンに至る吸気流路が通されていることが好ましい。このように上記吸気流路の挿通を許容する上記第２貫通孔は、上記排気ガス処理装置を上記天板に載置した後でもに上記エンジンに上記吸気装置が接続されることを可能にする。 The drive device further includes an intake device connected to the engine, and a second through hole that penetrates the top plate in the vertical direction is formed in the top plate, and the second through hole is formed from the intake device. It is preferable that the intake flow path leading to the engine is passed through. The second through hole that allows the insertion of the intake flow path in this way enables the intake device to be connected to the engine even after the exhaust gas treatment device is placed on the top plate. ..
　上記駆動装置は、上記エンジンに接続される冷却媒体タンクをさらに備え、上記天板には当該天板を上下方向に貫通する第２貫通孔が形成されて当該第２貫通孔に上記冷却水タンクから上記エンジンに至る冷却水流路が通されていることが好ましい。このように上記冷却水流路の挿通を許容する上記第２貫通孔は、上記排気ガス処理装置を上記天板に載置した後でも上記エンジンに上記冷却水タンクが接続されることを可能にする。 The drive device further includes a cooling medium tank connected to the engine, and the top plate is formed with a second through hole that penetrates the top plate in the vertical direction, and the cooling water tank is formed in the second through hole. It is preferable that the cooling water flow path from the engine to the engine is passed through. The second through hole that allows the cooling water flow path to be inserted in this way enables the cooling water tank to be connected to the engine even after the exhaust gas treatment device is mounted on the top plate. ..
　上記第２貫通孔には上記冷却水流路と上記吸気流路の双方が通されてもよい。 Both the cooling water flow path and the intake flow path may be passed through the second through hole.
　上記天板が、第１載置面を有して当該第１載置面の上に上記排気ガス処理装置が載置される第１載置部と、第２載置面を有して当該第２載置面の上に上記冷却水タンクが載置される第２載置部と、を含み、上記第１貫通孔が上記第１載置部に設けられ、上記第２貫通孔が上記第２載置部に設けられ、上記第１載置面が、当該第１載置面の上に載置される上記排気ガス処理装置を上記エンジンに近接させる第１高さ位置にあり、上記第２載置面が、上記第１高さ位置よりも高い位置であって当該第２載置面の上に載置される上記冷却水タンクを当該冷却媒体タンクを含む冷却系統における最上の位置に位置させる第２高さ位置にあることが好ましい。このように互いに高さの異なる第１及び第２載置面を有する上記天板は、相対的に低い位置にある上記第１載置面の上に載置された上記排気ガス処理装置と上記エンジンとを接続する排気管経路を短くして当該排気ガス処理装置に導入される排気ガスの温度の低下を抑制しながら、相対的に高い位置にある上記第２載置面の上に載置される上記冷却水タンクを上記冷却系統における最上の位置に位置させて上記冷却系統に含まれる冷却媒体ポンプの吸い込み圧力が容易に確保されることを可能にする。 The top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface. A second mounting portion on which the cooling water tank is mounted is provided on the second mounting surface, the first through hole is provided in the first mounting portion, and the second through hole is the above. The first mounting surface provided in the second mounting portion is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine. The second mounting surface is higher than the first height position, and the cooling water tank mounted on the second mounting surface is at the highest position in the cooling system including the cooling medium tank. It is preferably in the second height position. The top plate having the first and second mounting surfaces having different heights as described above is the exhaust gas treatment device and the exhaust gas treatment device mounted on the first mounting surface at a relatively low position. The exhaust pipe path connecting to the engine is shortened to suppress a decrease in the temperature of the exhaust gas introduced into the exhaust gas treatment device, and the exhaust gas is placed on the second mounting surface at a relatively high position. The cooling water tank is positioned at the highest position in the cooling system so that the suction pressure of the cooling medium pump included in the cooling system can be easily secured.
　また、提供されるのは、エンジンと、上記エンジンの排気ガスを処理する排気ガス処理装置と、上記エンジンに接続される冷却媒体タンクを含んで上記エンジンを冷却媒体により冷却する冷却系統と、を備えた建設機械の上記排気ガス処理装置及び上記冷却媒体タンクを支持するための架台であって、天板と、上記天板の下方に上記エンジンを収容するスペースを形成するように上記天板を支持する複数の脚部と、を備える。上記天板は、第１載置面を有して当該第１載置面の上に上記排気ガス処理装置が載置される第１載置部と、第２載置面を有して当該第２載置面の上に上記冷却媒体タンクが載置される第２載置部と、を含む。上記第１載置部には当該第１載置部を上下方向に貫通する第１貫通孔が設けられ、上記第２載置部には当該第２載置部を上下方向に貫通する第２貫通孔が設けられる。上記第１載置面は、当該第１載置面の上に載置される上記排気ガス処理装置を上記エンジンに近接させる第１高さ位置にある。上記第２載置面は、上記第１高さ位置よりも高い位置であって上記第２載置面の上に載置される上記冷却媒体タンクを上記冷却系統における最上の位置に位置させる第２高さ位置にある。 Also provided are an engine, an exhaust gas treatment device for treating the exhaust gas of the engine, and a cooling system including a cooling medium tank connected to the engine to cool the engine with a cooling medium. It is a stand for supporting the exhaust gas treatment device and the cooling medium tank of the construction machine provided, and the top plate is provided so as to form a top plate and a space for accommodating the engine below the top plate. It is provided with a plurality of supporting legs. The top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted and a second mounting surface. It includes a second mounting portion on which the cooling medium tank is mounted on the second mounting surface. The first mounting portion is provided with a first through hole that penetrates the first mounting portion in the vertical direction, and the second mounting portion has a second that penetrates the second mounting portion in the vertical direction. A through hole is provided. The first mounting surface is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine. The second mounting surface is a position higher than the first height position, and the cooling medium tank mounted on the second mounting surface is positioned at the highest position in the cooling system. It is at 2 heights.
　上記架台は、上記天板の下方に上記エンジンを収容するためのスペースを形成することにより、大きな重量をもつ排気ガス処理装置を上記エンジンに支持させることなく当該エンジンの上方のスペースを活用して配置することを可能にする。また、上記天板の上記第１載置部に設けられた上記第１貫通孔は、上記天板の下方のエンジンに供給される冷却風が当該第１貫通孔を通して上記第１載置面の上に載置された上記排気ガス処理装置を通過することを可能にし、これにより、当該冷却風を利用して上記排気ガス処理装置を冷却することを可能にする。 By forming a space below the top plate for accommodating the engine, the gantry utilizes the space above the engine without supporting the exhaust gas treatment device having a large weight by the engine. Allows for placement. Further, in the first through hole provided in the first mounting portion of the top plate, the cooling air supplied to the engine below the top plate passes through the first through hole in the first mounting surface. It is possible to pass through the exhaust gas treatment device mounted on the above, thereby cooling the exhaust gas treatment device by utilizing the cooling air.
　上記冷却系統は、上記エンジンを冷却媒体により冷却するための複数の機器の集合体であり、上記冷却媒体を収容する上記冷却媒体タンク、上記冷却媒体を循環させるための冷却媒体流路、及び当該冷却媒体流路に上記冷却媒体を流す冷却媒体ポンプを含む。当該冷却系統は、例えば、上記冷却媒体と上記冷却風との間で熱交換を行わせるラジエータ、サーモスタット、などをさらに含んでもよい。 The cooling system is an assembly of a plurality of devices for cooling the engine with a cooling medium, the cooling medium tank for accommodating the cooling medium, the cooling medium flow path for circulating the cooling medium, and the cooling medium flow path. A cooling medium pump for flowing the cooling medium through the cooling medium flow path is included. The cooling system may further include, for example, a radiator, a thermostat, etc. that allow heat exchange between the cooling medium and the cooling air.

Claims (7)

  1. 　エンジンと、
    　上記エンジンを冷却するための冷却風を生成するファンと、
    　上記エンジンの排気ガスを処理する排気ガス処理装置と、
    　上記エンジンの上方の位置であって上記冷却風が上記排気ガス処理装置の少なくとも一部を通過することが可能な冷却可能位置に上記排気ガス処理装置を支持する架台と、
    を備える建設機械の駆動装置。     With the engine
    With a fan that generates cooling air to cool the engine,
    An exhaust gas treatment device that treats the exhaust gas of the above engine and
    A gantry that supports the exhaust gas treatment device at a position above the engine and at a cooling position where the cooling air can pass at least a part of the exhaust gas treatment device.
    A drive device for construction machinery.
  2. 　請求項１に記載の建設機械の駆動装置であって、上記エンジン、上記排気ガス処理装置及び上記架台の全体を覆う外装カバーをさらに備えており、上記外装カバーは、排気用開口が形成された上端部を有しており、上記架台は、載置面を有して上記載置面の上に上記排気ガス処理装置が載置される天板とこの天板の下方にスペースを形成するように上記天板を支持する複数の脚部とを有しており、上記エンジン及び上記ファンが上記天板の下方の上記スペースに配置されており、上記天板には当該天板を上下方向に貫通する第１貫通孔が形成されていて当該第１貫通孔は当該第１貫通孔を通じて上記ファンから上記排気用開口に上記冷却風が流れることを許容する位置にある建設機械の駆動装置。 The drive device for a construction machine according to claim 1, further comprising an exterior cover that covers the entire engine, the exhaust gas treatment device, and the gantry, and the exterior cover is formed with an exhaust opening. The gantry has an upper end portion, and the gantry has a mounting surface so as to form a space below the top plate on which the exhaust gas treatment device is mounted and the top plate described above. It has a plurality of legs that support the top plate, and the engine and the fan are arranged in the space below the top plate, and the top plate is placed on the top plate in the vertical direction. A drive device for a construction machine in which a first through hole is formed and the first through hole is positioned to allow the cooling air to flow from the fan to the exhaust opening through the first through hole.
  3. 　請求項２に記載の建設機械の駆動装置であって、上記エンジンに接続される吸気装置をさらに備え、上記天板には第２貫通孔が形成されて当該第２貫通孔に上記吸気装置から上記エンジンに至る吸気流路が通されている建設機械の駆動装置。 The drive device for a construction machine according to claim 2, further comprising an intake device connected to the engine, a second through hole is formed in the top plate, and the second through hole is formed from the intake device. A drive device for construction machinery through which an intake flow path leading to the engine is passed.
  4. 　請求項２記載の建設機械の駆動装置であって、上記エンジンに接続される冷却媒体タンクをさらに備え、上記天板には当該天板を上下方向に貫通する第２貫通孔が形成されて当該第２貫通孔に上記冷却媒体タンクから上記エンジンに至る冷却媒体流路が通されている建設機械の駆動装置。 The drive device for a construction machine according to claim 2, further provided with a cooling medium tank connected to the engine, and the top plate is formed with a second through hole that penetrates the top plate in the vertical direction. A drive device for a construction machine through which a cooling medium flow path from the cooling medium tank to the engine is passed through a second through hole.
  5. 　請求項４に記載の建設機械の駆動装置であって、上記エンジンに接続される吸気装置をさらに備え、上記第２貫通孔に上記冷却媒体流路と上記吸気装置から上記エンジンに至る吸気流路とが通されている建設機械の駆動装置。 The drive device for a construction machine according to claim 4, further comprising an intake device connected to the engine, the cooling medium flow path in the second through hole, and the intake flow path from the intake device to the engine. Drive device for construction machinery that is passed through.
  6. 　請求項４または５に記載の建設機械の駆動装置であって、上記天板が、第１載置面を有して当該第１載置面の上に上記排気ガス処理装置が載置される第１載置部と、第２載置面を有して当該第２載置面の上に上記冷却媒体タンクが載置される第２載置部と、を含み、上記第１貫通孔は上記第１載置部に設けられ、上記第２貫通孔は上記第２載置部に設けられ、上記第１載置面は、当該第１載置面の上に載置される上記排気ガス処理装置を上記エンジンに近接させる第１高さ位置にあり、上記第２載置面は、上記第１高さ位置よりも高い位置であって上記第２載置面に載置される上記冷却媒体タンクを冷却系統における最上の位置に位置させる第２高さ位置にあり、上記冷却系統は上記エンジンを冷却媒体により冷却するための系統であって上記冷却媒体タンクを含む建設機械の駆動装置。 The drive device for a construction machine according to claim 4 or 5, wherein the top plate has a first mounting surface, and the exhaust gas treatment device is mounted on the first mounting surface. The first through hole includes a first mounting portion and a second mounting portion having a second mounting surface and on which the cooling medium tank is mounted on the second mounting surface. The exhaust gas is provided in the first mounting portion, the second through hole is provided in the second mounting portion, and the first mounting surface is mounted on the first mounting surface. The cooling is located at a first height position that brings the processing device close to the engine, and the second mounting surface is higher than the first height position and is mounted on the second mounting surface. It is located at a second height position that positions the medium tank at the highest position in the cooling system, and the cooling system is a system for cooling the engine by the cooling medium and is a drive device for a construction machine including the cooling medium tank.
  7. 　エンジンと、上記エンジンの排気ガスを処理する排気ガス処理装置と、冷却媒体タンクを含んで上記エンジンを冷却媒体により冷却する冷却系統と、を備える建設機械の上記排気ガス処理装置及び上記冷却媒体タンクを支持するための架台であって、
    　天板と、
    　上記天板の下方に上記エンジンを収容するスペースを形成するように当該天板を支持する複数の脚部と、を備えており、
    　上記天板が、第１載置面を有して当該第１載置面上に上記排気ガス処理装置が載置される第１載置部と、第２載置面を有して当該第２載置面上に上記冷却媒体タンクが載置される第２載置部と、を含み、
    　上記第１載置部には当該第１載置部を上下方向に貫通する第１貫通孔が設けられ、
    　上記第２載置部には当該第２載置部を上下方向に貫通する第２貫通孔が設けられ、
    　上記第１載置面は、当該第１載置面の上に載置される上記排気ガス処理装置を上記エンジンに近接させる第１高さ位置にあり、
    　上記第２載置面は、上記第１高さ位置よりも高い位置であって上記第２載置面の上に載置される上記冷却媒体タンクを上記冷却系統における最上の位置に位置させる第２高さ位置にある架台。     The exhaust gas treatment device and the cooling medium tank of a construction machine including an engine, an exhaust gas treatment device for treating the exhaust gas of the engine, and a cooling system for cooling the engine with a cooling medium including a cooling medium tank. It is a stand to support
    Top plate and
    It is provided with a plurality of legs that support the top plate so as to form a space for accommodating the engine below the top plate.
    The top plate has a first mounting surface and has a first mounting portion on which the exhaust gas treatment device is mounted, and a second mounting surface. 2 Includes a second mounting portion on which the cooling medium tank is mounted on the mounting surface.
    The first mounting portion is provided with a first through hole that penetrates the first mounting portion in the vertical direction.
    The second mounting portion is provided with a second through hole that penetrates the second mounting portion in the vertical direction.
    The first mounting surface is at a first height position in which the exhaust gas treatment device mounted on the first mounting surface is brought close to the engine.
    The second mounting surface is a position higher than the first height position, and the cooling medium tank mounted on the second mounting surface is positioned at the highest position in the cooling system. A stand at 2 heights.
PCT/JP2020/027824 2019-07-31 2020-07-17 Driving device and mount for construction machine WO2021020168A1 (en)

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JP2014065441A (en) * 2012-09-26 2014-04-17 Kubota Corp Service car
JP5363681B1 (en) * 2012-10-26 2013-12-11 株式会社小松製作所 Work vehicle
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