WO2015174149A1 - 建設機械 - Google Patents
建設機械 Download PDFInfo
- Publication number
- WO2015174149A1 WO2015174149A1 PCT/JP2015/059792 JP2015059792W WO2015174149A1 WO 2015174149 A1 WO2015174149 A1 WO 2015174149A1 JP 2015059792 W JP2015059792 W JP 2015059792W WO 2015174149 A1 WO2015174149 A1 WO 2015174149A1
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- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- hydraulic pump
- engine
- aftertreatment device
- gas aftertreatment
- Prior art date
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
- B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
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- 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
Definitions
- the present invention relates to a construction machine.
- Patent Document 1 discloses a large hydraulic excavator provided with a cooling fan on the left side of the engine, a hydraulic pump on the right side of the engine, and an exhaust gas aftertreatment device above the hydraulic pump in the engine room. Is disclosed.
- a pump chamber is provided in the engine room so that heat does not flow around the hydraulic pump, and the hydraulic pump is isolated from the engine and the exhaust gas aftertreatment device, and also by a cooling fan. A part of the cooling air passes through the pump chamber and is discharged outside the vehicle. In the pump chamber, the cooling air passes below the hydraulic pump.
- An object of the present invention is to provide a construction machine that can reduce the influence of heat on a hydraulic pump.
- the construction machine of the present invention includes an engine room that houses an engine, a cooling unit, a hydraulic pump driven by the engine, and an exhaust gas aftertreatment device provided above the hydraulic pump.
- an engine room that houses an engine, a cooling unit, a hydraulic pump driven by the engine, and an exhaust gas aftertreatment device provided above the hydraulic pump.
- a ceiling portion that covers the engine and the exhaust gas aftertreatment device, and an exterior cover that covers sides of the exhaust gas aftertreatment device and the hydraulic pump, and the ceiling portion, the engine, and the A flow path is provided between the exhaust gas after-treatment device and the cooling air from the cooling unit to the hydraulic pump side.
- a cooling air flow path is provided, and a wind shielding plate for blocking the flow path is provided above the hydraulic pump.
- the cooling air flowing through the flow path passes between the ceiling of the engine room and the engine and the exhaust gas aftertreatment device, and after passing through the exhaust gas aftertreatment device, Wrap around to the other side.
- the engine and the exhaust gas aftertreatment device are heated, so that the cooling air flows while absorbing the heat of the engine and the exhaust gas aftertreatment device.
- the cooling air after passing through the engine and the exhaust gas aftertreatment device is at a high temperature.
- the high-temperature cooling air that has passed through the exhaust gas aftertreatment device and circulated to the other side of the engine eventually hits a wind shielding plate that blocks the flow path.
- the wind shielding plate is formed in a convex shape upward.
- the wind shielding plate is configured to be removable from the side of the engine room.
- the cooling air hits the wind shielding plate after flowing through the surfaces of the engine and the exhaust gas aftertreatment device, and passes through an exhaust port provided at the bottom of the engine room to the outside. Preferably it is discharged.
- the windshield plate is provided between the exhaust gas aftertreatment device and the exterior cover.
- FIG. 1 is a side view showing a hydraulic excavator according to an embodiment of the present invention. Sectional drawing seen from the cut surface which cuts an engine room in the front-back direction.
- FIG. 3 is an enlarged view around an exhaust gas aftertreatment device in FIG. 2. Sectional drawing which looked at the engine room from the IV direction of FIG. The perspective view of the apparatus in an engine room. The perspective view of a windshield.
- the front / rear / left / right / up / down directions refer to the front / rear / left / right / up / down directions when the operator seated on the operator seat 5 of the excavator 1 as a construction machine faces the front in the state shown in FIG.
- the left-right direction is the same as the vehicle width direction of the excavator 1.
- the front-rear direction and the left-right direction are represented using symbols F, B, L, R and arrows.
- a hydraulic excavator 1 is a vehicle classified as a small excavator, and includes a lower traveling body 2, an upper swing body 3 provided on the lower traveling body 2, a work machine that performs excavation of earth and sand, and the like. 4 is provided.
- the hydraulic excavator 1 has a canopy specification, and a roof 5 ⁇ / b> B supported by two struts 5 ⁇ / b> A erected on the upper swing body 3 is provided above the operator seat 5. Further, the hydraulic excavator 1 has a tilt-up floor 6 that is a floor surface of the operator seat 5, and the operator seat 5 can be tilted up and down together with the roof 5B.
- the upper swing body 3 is provided so as to be rotatable with respect to the lower traveling body 2 by a swing hydraulic motor (not shown).
- the lower side of the upper swing body 3 includes a revo frame 30 that is a frame of the upper swing body 3, and a work machine 4 is provided at the front end of the revo frame 30.
- the work machine 4 is attached to the revo frame 30 so that it can swing up and down, an arm 15 attached to the tip of the boom 14 so as to swing up and down, and attached to the tip of the arm 15 so as to swing up and down.
- the boom 14, the arm 15, and the bucket 16 are connected to the tip ends of the cylinder rods of the boom cylinder 14A, the arm cylinder 15A, and the bucket cylinder 16A, which are hydraulic cylinders, and swing when the cylinder rods are expanded and contracted. Operate.
- the engine room 31 that houses the engine 7 that is a diesel engine is provided in the latter half of the revo frame 30, and a counterweight 32 is attached to the rear end of the revo frame 30.
- a step-up tilt-up floor 6 In the tilt-down state, the front half of the revo frame 30 and the upper part of the engine room 31 are covered with a step-up tilt-up floor 6.
- An operator seat 5 is provided on the upper part of the rear side of the tilt-up floor 6.
- a support plate 33 extending in the left-right direction is provided above the rear side of the engine room 31 (see FIG. 4).
- the support plate 33 is in contact with the lower surface of the tilt-up floor 6 in the tilt-down state, and supports the tilt-up floor 6 from below.
- the support plate 33 is fixed to the upper part of the counterweight 32 on both sides in the left-right direction, and constitutes the ceiling part of the engine room 31 together with the tilt-up floor 6.
- a plurality of openings are formed in the bottom surface of the engine room 31, and a louver 31B is provided in one of the openings.
- the louver 31 ⁇ / b> B serves as an exhaust port for the engine room 31. By using the louver 31B as the discharge port, intrusion of pebbles and the like from below is prevented.
- a cooling fan 8 as a cooling unit is provided on the right side of the engine 7, and a hydraulic pump 9 is provided on the lower left side of the engine 7.
- the cooling fan 8 is rotationally driven by the engine 7, draws outside air as cooling air from outside the engine room 31, supplies it to an engine radiator (not shown) provided outside the cooling fan 8, and passes through the engine radiator and the cooling fan 8.
- the cooled cooling air flows toward the engine 7.
- an exhaust gas aftertreatment device 10 connected to an exhaust pipe of the engine 7 is provided above the hydraulic pump 9.
- the exhaust gas aftertreatment device 10 is bolted to the upper surface of a flywheel case (not shown) of the engine 7 so that the longitudinal direction, that is, the exhaust gas flow direction is the front-rear direction.
- a cylindrical diesel particulate filter (hereinafter simply referred to as “filter”) (not shown) is accommodated in the cylindrical case of the exhaust gas aftertreatment device 10. This filter collects particulate matter in the exhaust gas that passes through it.
- the exhaust gas flowing into the exhaust gas aftertreatment device 10 passes through the filter to the rear side, and is then discharged to the outside through the tail pipe (not shown) from below the revo frame 30.
- the protective cover 11 includes a protective plate 11A, a protective pipe 11B that supports the protective plate 11A, and a heat insulating member 11C attached to the surface of the protective plate 11A.
- the protective plate 11 ⁇ / b> A is provided from the vicinity of the front edge of the support plate 33 to the vicinity of the upper surface of the revo frame 30.
- the protective pipe 11B is obtained by welding and joining a plate-like portion 11D to a steel pipe formed in a substantially L shape.
- the plate-like portion 11D covers the left side of the exhaust gas aftertreatment device 10 and prevents an operator from unintentionally touching the exhaust gas aftertreatment device 10 when the side cover 31A is removed.
- the heat insulating member 11C is formed of a glass fiber material having heat insulating properties and heat resistance, and is fixed to the protective plate 11A via a plurality of fixing fittings (not shown) penetrating the front and back surfaces.
- the hydraulic pump 9 is driven by the engine 7 and supplies pressurized hydraulic fluid to the traveling hydraulic motor, the turning hydraulic motor, the hydraulic cylinders 14A, 15A, and 16A (see FIG. 1) of the work machine 4, and the like.
- the hydraulic pump 9 one having an appropriate structure can be applied according to required performance, such as a constant capacity type, an oblique axis type variable capacity type, and a swash plate type variable capacity type.
- a hydraulic pump 9 is provided up to a position protruding leftward from the exhaust gas aftertreatment device 10.
- the hydraulic pump 9 is connected to hoses and piping for supplying hydraulic oil to other hydraulic equipment and collecting hydraulic oil from other hydraulic equipment.
- Each connection portion is provided with a rubber O-ring for obtaining a sealing effect. Therefore, when the cooling air to which the hydraulic pump 9 is exposed is at a high temperature, the surface of the hydraulic pump 9 and the temperature of the hydraulic oil are increased, so that the deterioration of the O-ring is accelerated and the sealing performance is lowered. As a result, there is a concern that hydraulic fluid may leak.
- the hydraulic excavator 1 includes a wind shielding plate 40 described below.
- the hydraulic excavator 1 includes a wind shielding plate 40 between the exhaust gas post-treatment device 10 and the side cover 31A above a portion of the hydraulic pump 9 that protrudes to the left from the exhaust gas post-treatment device 10 ( (See FIGS. 2 to 4).
- the wind shield plate 40 is made of a thin steel plate, and includes a main body portion 50 formed by pressing or the like, and a fixing portion 60 welded to the main body portion 50.
- FIG. 6 shows the wind shield plate 40 alone.
- the main body 50 is formed in an upwardly convex shape as a whole, and includes a horizontal plane part 51, a front inclined surface part 52 that is connected to the front end of the horizontal plane part 51 and is bent downward and inclined with respect to the horizontal plane part 51.
- the rear inclined surface portion 53 connected to the rear end of the horizontal plane portion 51 and bent downward with respect to the horizontal plane portion 51, and the left end edge of the horizontal plane portion 51, the front inclined surface portion 52, and the rear inclined surface portion 53 It is comprised from the side part 54 which continued and bent upwards with respect to them, and was inclined.
- the front inclined surface portion 52 extends forward beyond the front portion of the hydraulic pump 9, and the rear inclined surface portion 53 extends rearward beyond the rear portion of the hydraulic pump 9.
- the center of the horizontal plane portion 51 in the front-rear direction is on the rear side of the center of the hydraulic pump 9, and the front inclined surface portion 52 is formed longer than the rear inclined surface portion 53.
- the angle formed with respect to the horizontal surface portion 51 of the front inclined surface portion 52 is substantially equal to the angle formed with respect to the horizontal surface portion 51 of the rear inclined surface portion 53.
- the fixing portion 60 is a belt-like member having a predetermined longitudinal length and vertical width, and the rear end is welded over a bent portion between the horizontal plane portion 51 and the front inclined surface portion 52. Further, two through holes 61 arranged in the front-rear direction are formed on the front end side of the fixed portion 60.
- the wind shield plate 40 is fixed to the protective pipe 11 ⁇ / b> B of the protective cover 11 from the left by the two bolts 13 inserted through the through holes 61 of the fixing portion 60.
- the wind shield plate 40 can be detached from the front or the upper side of the engine room 31 when the tilt-up floor 6 is in the tilt-up state, and can be detached from the side by removing the side cover 31A even in the tilt-down state.
- the wind shield plate 40 can be easily attached and detached, the maintainability of the hydraulic pump 9 is not impaired even if the wind shield plate 40 is provided.
- the cooling air whose flow direction has been changed downward is lowered along the side cover 31A along the vertical flow path 22 which is a flow path formed between the exhaust gas aftertreatment device 10 and the hydraulic pump 9 and the back surface of the side cover 31A. And eventually reaches the wind shielding plate 40 that blocks a part of the vertical flow path 22. Since the wind shielding plate 40 is formed in an upwardly convex shape, most of the cooling air hitting the wind shielding plate 40 is distributed in the front-rear direction, and the remaining part gets over the side surface portion 54 and is on the side cover 31A side. Flowing into.
- the front inclined surface portion 52 of the wind shielding plate 40 extends beyond the front portion of the hydraulic pump 9, and the rear inclined surface portion 53 extends beyond the rear portion of the hydraulic pump 9.
- the cooling air flowing through the flow path 22 flows downward so as to avoid the hydraulic pump 9.
- the cooling air flowing to the bottom side of the engine room 31 is discharged to the outside from the louvers 31B provided on the bottom surface.
- the wind shield plate 40 is provided above the hydraulic pump 9, so that the cooling air that has become a high temperature due to absorption of heat from the engine 7 and the exhaust gas aftertreatment device 10 can be obtained. Direct exposure of the hydraulic pump 9 is avoided. Therefore, the temperature of the hydraulic pump 9 can be suppressed below the upper limit value, and the operating state of the hydraulic pump 9 can be maintained well.
- the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
- the main body portion 50 of the wind shield plate 40 is formed in an upwardly convex shape having the front inclined surface portion 52 and the rear inclined surface portion 53, but the entire upper surface is a front inclined surface or a rear inclined surface. You may form in the flat form which is a surface.
- the wind shielding plate 40 is bolted to the protective cover 11, the fixing destination and the fixing method may be other appropriate methods. However, a configuration in which the wind shield plate 40 can be easily detached from the side of the engine room 31 is preferable.
- the excavator 1 has the tilt-up floor 6, but may have a fixed floor.
- the excavator 1 includes the exhaust gas aftertreatment device 10, but may further include a selective catalytic reduction device using urea water or the like as a reducing agent.
- the present invention can be used not only for hydraulic excavators but also for wheel loaders.
- SYMBOLS 1 Hydraulic excavator (construction machine), 6 ... Tilt-up floor (ceiling part), 7 ... Engine, 8 ... Cooling fan (cooling unit), 9 ... Hydraulic pump, 10 ... Exhaust gas aftertreatment device, 21 ... Horizontal flow path (Flow path), 22 ... vertical flow path (flow path), 31 ... engine room, 31A ... side cover (exterior cover), 31B ... louver (discharge port), 33 ... support plate (ceiling part), 40 ... wind shielding Board.
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- Combustion & Propulsion (AREA)
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- Component Parts Of Construction Machinery (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
以下の説明において、前後・左右・上下方向とは、図1に示す状態において、建設機械である油圧ショベル1のオペレータシート5に着座したオペレータが正面を向いた状態における前後・左右・上下方向を言い、左右方向は油圧ショベル1の車幅方向と同意である。また、図中において、前後方向、左右方向を符号F、B、L、Rと矢印とを用いて表す。
本実施形態に係る油圧ショベル1は、小型ショベルに分類される車両であり、下部走行体2と、下部走行体2の上に設けられた上部旋回体3と、土砂の掘削等を行う作業機4とを備えている。油圧ショベル1はキャノピ仕様であり、オペレータシート5の頭上には、上部旋回体3に立設された2本の支柱5Aによって支持されるルーフ5Bが設けられている。また、油圧ショベル1は、オペレータシート5の床面であるチルトアップフロア6を有し、オペレータシート5をルーフ5Bとともにチルトアップおよびチルトダウンさせることが可能である。
油圧ポンプ9は、エンジン7により駆動され、走行用油圧モータ、旋回用油圧モータ、および作業機4の各油圧シリンダ14A,15A,16A(図1参照)等に昇圧された作動油を供給する。油圧ポンプ9としては、定容量型、斜軸式の可変容量型、斜板式の可変容量型など、要求される性能等に応じて適宜な構造のものを適用できる。このような油圧ポンプ9は、図2に示すように、排気ガス後処理装置10よりも左方に突出した位置まで設けられている。
油圧ショベル1は、油圧ポンプ9の排気ガス後処理装置10よりも左方に突出して設けられた部分の上方の排気ガス後処理装置10とサイドカバー31Aとの間に遮風板40を備える(図2~図4参照)。遮風板40は、薄い鋼鈑製であり、プレス加工等によって形成される本体部50と、本体部50に溶接接合された固定部60とを有する。
本体部50は、全体が上向きに凸状に形成されており、水平面部51と、水平面部51の前端に接続し水平面部51に対して下側に折曲して傾斜した前側傾斜面部52と、水平面部51の後端に接続し水平面部51に対して下側に折曲して傾斜した後側傾斜面部53と、水平面部51、前側傾斜面部52、および後側傾斜面部53の左端縁と連続し、それらに対して上側に折曲して傾斜した側面部54とから構成されている。
図2ないし図4に基づき、エンジンルーム31内における冷却風の経路について説明する。図2ないし図4中における矢印は、エンジンルーム31内における冷却風の経路を示すものである。
油圧ショベル1の運転中において、冷却ファン8によってエンジン7に向けて流された冷却風の一部は、エンジン7のシリンダヘッド周辺の熱を吸収しながら、エンジン7の上面とチルトアップフロア6の下面および支持プレート33の下面との間に形成された流路である水平流路21を左方に流れる。水平流路21を左方に流れる冷却風は、やがて排気ガス後処理装置10に達し、排気ガス後処理装置10からさらに熱を吸収する。排気ガス後処理装置10の熱を吸収してさらに高温になった冷却風は、排気ガス後処理装置10の円筒状のケースおよびエンジンルーム31の隅部に形成された曲面に沿って流れ方向を下向きに変える。
例えば、前記実施形態では、遮風板40の本体部50が、前側傾斜面部52と後側傾斜面部53とを有する上向きに凸状に形成されていたが、上面全体が前方傾斜面または後方傾斜面である平板状に形成されていてもよい。
また、遮風板40は、保護カバー11にボルト固定されていたが、固定先および固定方法は他の適当な方法でもよい。ただし、エンジンルーム31の側方から遮風板40の脱着が容易に行える構成が好ましい。
前記実施形態では、油圧ショベル1が排気ガス後処理装置10を備えているが、それに加えて尿素水等を還元剤とする選択触媒還元装置を備えていてもよい。
Claims (5)
- エンジンと、クーリングユニットと、前記エンジンによって駆動される油圧ポンプと、前記油圧ポンプの上方に設けられた排気ガス後処理装置とを収容するエンジンルームを備え、
前記エンジンルームには、前記エンジンおよび前記排気ガス後処理装置の上方を覆う天井部と、前記排気ガス後処理装置および前記油圧ポンプの側方を覆う外装カバーとが設けられ、
前記天井部と前記エンジンおよび前記排気ガス後処理装置との間には前記クーリングユニットからの冷却風を前記油圧ポンプ側に導く流路が設けられ、さらに、前記排気ガス後処理装置の通過後に前記外装カバーに沿って車体の下方に向かう冷却風の流路が設けられ、
前記油圧ポンプの上方には、前記流路を遮る遮風板が設けられている
ことを特徴とする建設機械。 - 請求項1に記載の建設機械において、
前記遮風板は、上向きに凸状に形成されている
ことを特徴とする建設機械。 - 請求項1または請求項2に記載の建設機械において、
前記遮風板は、前記エンジンルームの側方から脱着可能に構成されている
ことを特徴とする建設機械。 - 請求項1ないし請求項3の何れか一項に記載の建設機械において、
前記冷却風は、前記流路を流れた後に前記遮風板に当たり、前記エンジンルームの底部に設けられた排出口を通って外部に排出される
ことを特徴とする建設機械。 - 請求項1ないし請求項4の何れか一項に記載の建設機械において、
前記遮風板は、前記排気ガス後処理装置と前記外装カバーとの間に設けられている
ことを特徴とする建設機械。
Priority Applications (4)
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DE112015000080.1T DE112015000080B4 (de) | 2015-03-27 | 2015-03-27 | Baumaschine |
CN201580000988.4A CN105339559A (zh) | 2015-03-27 | 2015-03-27 | 建筑机械 |
JP2015545544A JP5947467B2 (ja) | 2015-03-27 | 2015-03-27 | 建設機械 |
PCT/JP2015/059792 WO2015174149A1 (ja) | 2015-03-27 | 2015-03-27 | 建設機械 |
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2015
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JP2001303614A (ja) * | 2000-04-20 | 2001-10-31 | Komatsu Ltd | 油圧ショベルの遮蔽板 |
JP2005068810A (ja) * | 2003-08-25 | 2005-03-17 | Hitachi Constr Mach Co Ltd | 建設機械の遮蔽装置 |
JP2010058591A (ja) * | 2008-09-02 | 2010-03-18 | Caterpillar Japan Ltd | 作業機械のエンジンルームの整流板,作業機械のエンジンルームの整流板の製造方法及び作業機械のエンジンルーム構造 |
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DE112015000080T5 (de) | 2016-01-28 |
JP5947467B2 (ja) | 2016-07-06 |
CN105339559A (zh) | 2016-02-17 |
DE112015000080B4 (de) | 2018-08-16 |
JPWO2015174149A1 (ja) | 2017-04-20 |
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