WO2016027344A1 - Industrial vehicle - Google Patents
Industrial vehicle Download PDFInfo
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- WO2016027344A1 WO2016027344A1 PCT/JP2014/071868 JP2014071868W WO2016027344A1 WO 2016027344 A1 WO2016027344 A1 WO 2016027344A1 JP 2014071868 W JP2014071868 W JP 2014071868W WO 2016027344 A1 WO2016027344 A1 WO 2016027344A1
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- WIPO (PCT)
- Prior art keywords
- exhaust gas
- vehicle body
- air passage
- engine
- gas purification
- Prior art date
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Classifications
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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
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Definitions
- the present invention relates to an industrial vehicle, and more particularly to an industrial vehicle such as a forklift or an excavator loader equipped with an engine as a power source and having a working device attached to the front part of the vehicle body.
- Some industrial vehicles such as forklifts and shovel loaders have a diesel engine as a power source.
- exhaust gas regulations are applied to diesel engine vehicles, and harmful substances such as particulate matter (PM), sulfur oxide and nitrogen oxide (NO X ) in exhaust gas are reduced below a predetermined reference value. It is mandatory. Therefore, even in an industrial vehicle equipped with a diesel engine, an exhaust gas purification device is attached upstream of the silencer of the exhaust pipe of the engine.
- a conventional forklift equipped with a diesel engine includes a working device at the front of the vehicle body, and a counterweight portion for balancing the load exerted on the working device at the rear of the vehicle body. It is attached to the vehicle body in front of the counterweight part (see, for example, Patent Documents 1 and 2). An air passage extending in the front-rear direction of the vehicle body is provided inside the counterweight portion.
- a radiator is disposed behind the engine and immediately before the front end opening of the air passage or in front of the air passage, and a radiator fan for cooling the radiator is disposed between the engine and the radiator. The airflow generated by the rotation of the radiator fan is discharged to the outside of the vehicle body through the air passage.
- the forklift is also supported by the vehicle body, and has an exhaust pipe whose one end is connected to the engine and the other end protrudes outside from the rear part of the vehicle body, and an exhaust gas purifying device and a silencer provided in the middle of the exhaust pipe.
- the exhaust gas purification device and the silencer usually have a cylindrical outer shape, and when the size of the forklift is small, the exhaust gas purification device and the silencer become a relatively large constituent unit in the forklift.
- the operating temperature of the exhaust gas purification device is quite high (about 400 to 800 ° C.), and the exhaust gas purification device is heated by the exhaust gas introduced into the exhaust gas purification device. It is preferable that it be arranged as close as possible to the exhaust manifold of the engine.
- the location of the engine exhaust system including the exhaust pipe, the exhaust gas purification device and the silencer is a problem in the vehicle body.
- the engine, the radiator, the radiator fan, and the counterweight unit are disposed on the vehicle body. It is desirable that (the mutual positional relationship) does not change the existing arrangement for the structural reasons of the forklift.
- the engine exhaust system is installed inside the counterweight part in consideration of compactness of the vehicle body, securing of the driver's view, prevention of burns of the driver, ease of maintenance of the exhaust gas purification device, etc.
- an exhaust gas purification device is disposed to face the rear surface of the radiator (see, for example, Patent Documents 1 and 2).
- the cooling air is directly blown from the rotating radiator fan to the exhaust gas purification device to cool the exhaust gas purification device, while the radiator receives the heat released from the exhaust gas purification device and heats it properly.
- the cooling efficiency of the engine cooling water by the radiator and the exhaust gas purification efficiency by the exhaust gas purification device are both deteriorated.
- an object of the present invention is to enable the engine exhaust system to be accommodated in the counterweight portion without reducing both the cooling efficiency by the radiator and the exhaust gas purification efficiency by the exhaust gas purification device.
- a working device attached to a front portion of a vehicle body, a counter weight portion disposed at a rear portion of the vehicle body, for balancing the load exerted on the working device,
- An air passage extending in the front-rear direction of the vehicle body, and an engine as a power source that is attached to the vehicle body and disposed in front of the counterweight portion.
- a radiator disposed behind the engine and immediately before the front end opening of the air passage or in front of the air passage; and a radiator fan disposed between the engine and the radiator for cooling the radiator. The air flow generated by the rotation of the radiator fan is exhausted to the outside of the vehicle body through the air passage.
- an exhaust pipe that is supported by the vehicle body, has one end connected to the engine, and has the other end protruding from the rear of the vehicle body to the outside, and an exhaust gas provided in the middle of the exhaust pipe
- a step is formed between a bottom surface of a front portion of the air passage and a bottom surface of a rear portion of the air passage, and the bottom surface of the rear portion is a bottom surface of the front portion.
- the exhaust gas purifying device and the silencer are arranged side by side in the rear part of the ventilation path so that the exhaust gas purifying device is below the silencer and the exhaust gas purifying device. Is disposed so as to be lower than the bottom surface of the front portion of the air passage.
- each of the exhaust gas purification device and the silencer has a cylindrical outer shape and extends in the left-right direction of the vehicle body.
- the radiator is erected on the bottom surface of the front portion of the air passage.
- the exhaust pipe extends from the engine to a position lower than a front portion of the air passage inside the counterweight portion to the exhaust gas purification device.
- a first portion, a second portion extending between the exhaust gas purifying device and the silencer, and extending upward from the silencer across the air passage and then projecting outward from the upper wall of the counterweight portion It consists of a third part.
- the industrial vehicle comprises a forklift.
- a step is formed between the front bottom surface and the rear bottom surface of the air passage provided in the counterweight portion of the industrial vehicle, and the rear bottom surface is lower than the front bottom surface.
- the exhaust gas purifying device and the silencer are arranged one above the other so that the exhaust gas purifying device is below the silencer at the rear of the vent passage, and the exhaust gas purifying device is more than the bottom of the front portion of the vent passage. Because it is placed at a low position, the exhaust gas purifier directly receives the cooling air from the radiator fan and the radiator receives the heat released from the exhaust gas purifier while the industrial vehicle is in operation. This eliminates wasteful cooling of the exhaust gas purification device and wasteful heating of the radiator.
- the exhaust system of the engine can be accommodated in the counterweight portion in a compact manner without reducing the exhaust gas purification efficiency by the exhaust gas purification device and the cooling efficiency by the radiator. Furthermore, the existing structure of the industrial vehicle is almost changed by using the rear part of the vent passage of the counterweight part, that is, the rear part of the counterweight part, as the storage space for the exhaust gas purification device and the silencer. Therefore, the present invention can be applied to existing industrial vehicles at a very low cost.
- FIG. 1 is a side view showing the overall configuration of an industrial vehicle in the form of a forklift according to one embodiment of the present invention.
- FIG. 2 is a cross-sectional view taken along the central axis direction of the vehicle body, showing an outline of the structure of the counterweight portion of the forklift shown in FIG. 1. It is a perspective view which shows the main components inside the counterweight part shown by FIG.
- FIG. 1 is a side view schematically showing the overall configuration of an industrial vehicle according to an embodiment of the present invention.
- the industrial vehicle has the form of a forklift.
- a fork 2 as a working device is attached to the front part of a vehicle body 1 of a forklift, while a counterweight part 3 for balancing the load exerted on the fork 2 is attached to the rear part of the vehicle body 1.
- an engine (diesel engine) 4 as a power source is provided in front of the counterweight portion 3 in the vehicle body 1.
- FIG. 2 is a cross-sectional view taken along the central axis direction of the vehicle body 1 showing an outline of the structure of the counterweight portion 3 of the forklift.
- FIG. 3 is a schematic view of the main portion inside the counterweight portion 3 shown in FIG. It is a perspective view which shows a component.
- the counterweight portion 3 has an upper wall 3 a, a rear wall 3 b, and left and right side walls (not shown), and the counterweight portion 3 extends in the front-rear direction of the vehicle body 1.
- a vent path 5 is provided in which the front end opening forms the air inlet 5a and the rear end opening forms the air outlet 5b.
- the air outlet 5 b is provided on the rear wall 3 b of the counterweight portion 3.
- the ventilation path 5 is formed such that a step 14 is formed between the bottom surface 6 a of the front portion 6 and the bottom surface of the rear portion 7, and the bottom surface of the rear portion 7 is lower than the bottom surface 6 a of the front portion 6.
- the bottom surface 6a of the front portion 6 of the air passage 5 is formed from a part of the surface of the counterweight or the vehicle body 9, and the bottom surface of the rear portion 7 of the air passage 5 is open.
- a radiator 8 for cooling the engine coolant is disposed in the front portion 6 of the air passage 5.
- the radiator 8 is erected on the bottom surface 6 a of the front portion 6 of the air passage 5 so as to face the air inlet 5 a and the air outlet 5 b.
- the radiator 8 is disposed at the front portion 6 of the air passage 5, but if necessary, the radiator 8 is disposed behind the engine 4 and immediately before the air inlet 5 a of the air passage 5. You can also.
- a radiator fan 10 that cools the radiator 8 is disposed between the engine 4 and the radiator 8.
- the radiator fan 10 is disposed so as to face the front surface of the radiator 8, and its rotating shaft 10 a is connected to the engine 4.
- the radiator fan 10 is rotationally driven by the engine 4.
- the air flow generated by the rotation of the radiator fan 10 passes through the air passage 5 and is discharged from the air outlet 5b to the outside of the vehicle body 1.
- the forklift is further supported by the vehicle body 1, one end is connected to the engine 4, and the other end protrudes outside from the rear part of the vehicle body 1, and exhaust gas purification provided in the middle of the exhaust pipe 11.
- a device 12 and a silencer 13 are provided.
- the exhaust gas purification device 12 includes, for example, a DPF (Diesel Particulate Filter) and a DOC (Diesel Oxidation Catalyst).
- the exhaust gas purification device 12 and the silencer 13 each have a cylindrical outer shape.
- the exhaust gas purifying device 12 and the silencer 13 are arranged vertically in the rear portion 7 of the air passage 5 so that each extends in the left-right direction of the vehicle body 1 and the exhaust gas purifying device 12 is below the silencer 13.
- the exhaust gas purification device 12 is disposed at a position lower than the bottom surface of the front portion 6 of the ventilation path 5.
- the exhaust gas purification device 12 and the silencer 13 are fixed directly to the vehicle body 1 using bolts and nuts at predetermined positions, or are fixed to the vehicle body 1 via appropriate support members. ing.
- the exhaust pipe 11 passes from the engine 4 (exhaust manifold (not shown) of the engine 4) through a position lower than the front portion 6 of the air passage 5 inside the counterweight portion 3, and is connected to one of the exhaust gas purification devices 12.
- a first portion 11a extending to the end surface 12a, and a second portion 11b connecting the end surface 12b of the exhaust gas purification device 12 and the end surface 13b of the silencer 13 on the other end surface 12b side of the exhaust gas purification device 12,
- the third part 11c protrudes outward from the upper wall 3a of the counterweight part 3 after extending across the ventilation path 5 upward from the other end face 13a of the silencer 13.
- the tip end (exhaust port) of the exhaust pipe 11 protrudes upward from the upper wall 3a of the counterweight portion 3.
- the position where the tip end (exhaust port) of the exhaust pipe 11 projects from the vehicle body 1 is as follows.
- the front end (exhaust port) of the exhaust pipe 11 may protrude from a lower position of the rear portion of the vehicle body 1.
- the first to third portions 11a to 11c of the exhaust pipe 11 are all connected to the exhaust gas purifying device 12 and the end faces 12a and 12b; 13a and 13b of the silencer 13.
- the connection positions of the first to third portions 11a to 11c to the exhaust gas purification device 12 and the silencer 13 are not limited to this embodiment.
- the first to third portions 11a to 11c are connected to the exhaust gas purification device 12 and It is good also as a structure connected to the edge part peripheral surface of the silencer 13.
- the exhaust gas purifying device 12 and the silencer 13 are arranged one above the other in the rear portion 7 of the vent passage 5 so that the exhaust gas purifying device 12 is below the silencer 13 and the exhaust gas purifying device 12 is connected to the vent passage 5. Since it is disposed at a position lower than the bottom surface 6a of the front portion 6, the exhaust gas purification device 12 directly receives the cooling air from the radiator fan 10 during the operation of the forklift, and the radiator 8 is the exhaust gas purification device. Accordingly, the exhaust heat from the exhaust gas purifying device 12 and the wasteful heating of the radiator 8 can be minimized.
- the exhaust system of the engine 4 can be accommodated in the counterweight unit 3 in a compact manner without reducing the exhaust gas purification efficiency by the exhaust gas purification device 12 and the cooling efficiency by the radiator 8.
- the present invention can be applied to an existing forklift at an extremely low cost.
- the engine 4 exhaust manifold
- the exhaust gas purification device 12 can be connected at the shortest distance, and the portion 11a of the exhaust pipe 11 extending between the engine 4 and the exhaust gas purification device 12 is
- the exhaust gas can be disposed in a region that hardly receives the cooling air from the radiator fan 10, thereby supplying the exhaust gas from the engine 4 to the exhaust gas purification device 12 while maintaining the high temperature state.
- the exhaust gas purification efficiency by the device 12 can be further increased.
- the industrial vehicle is a forklift, but the industrial vehicle to which the present invention is applicable is not limited to a forklift.
- the present invention can be applied to any industrial vehicle having a working device at the front portion of the vehicle body and a counterweight portion for balancing the load exerted on the working device at the rear portion of the vehicle body. .
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Transportation (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
This industrial vehicle is provided with a work apparatus in a front section of a vehicle body (1) and a counterweight unit (3) in a rear section of the vehicle body. The inside of the counterweight unit has an air passage (5). A step (14) is formed between the bottom surface (6a) of a front portion (6) and the bottom surface of a rear portion (7) of the air passage. The bottom surface of the rear portion of the air passage is positioned lower than the bottom surface of the front portion. An exhaust gas purification device (12) and a muffler (13) are arranged, vertically in sequence, in the rear portion of the air passage, such that the exhaust gas purification device is placed below the muffler. Also, the exhaust gas purification device is positioned lower than the bottom surface of the front portion of the air passage.
Description
本発明は、産業用車両、特に、動力源としてエンジンを備え、車体の前部に作業装置が取り付けられたフォークリフトやショベルローダーのような産業用車両に関するものである。
The present invention relates to an industrial vehicle, and more particularly to an industrial vehicle such as a forklift or an excavator loader equipped with an engine as a power source and having a working device attached to the front part of the vehicle body.
フォークリフトやショベルローダー等のような産業用車両の中には、動力源としてディーゼルエンジンを備えたものがある。
ところで、ディーゼルエンジン車には排気ガス規制が適用され、排気ガス中の粒子状物質(PM)、硫黄酸化物および窒素酸化物(NOX)等の有害物質を定められた基準値以下に低減させることが義務付けられている。
そのため、ディーゼルエンジンを搭載した産業用車両においても、エンジンの排気管の消音器の上流側に排気ガス浄化装置が取り付けられている。 Some industrial vehicles such as forklifts and shovel loaders have a diesel engine as a power source.
By the way, exhaust gas regulations are applied to diesel engine vehicles, and harmful substances such as particulate matter (PM), sulfur oxide and nitrogen oxide (NO X ) in exhaust gas are reduced below a predetermined reference value. It is mandatory.
Therefore, even in an industrial vehicle equipped with a diesel engine, an exhaust gas purification device is attached upstream of the silencer of the exhaust pipe of the engine.
ところで、ディーゼルエンジン車には排気ガス規制が適用され、排気ガス中の粒子状物質(PM)、硫黄酸化物および窒素酸化物(NOX)等の有害物質を定められた基準値以下に低減させることが義務付けられている。
そのため、ディーゼルエンジンを搭載した産業用車両においても、エンジンの排気管の消音器の上流側に排気ガス浄化装置が取り付けられている。 Some industrial vehicles such as forklifts and shovel loaders have a diesel engine as a power source.
By the way, exhaust gas regulations are applied to diesel engine vehicles, and harmful substances such as particulate matter (PM), sulfur oxide and nitrogen oxide (NO X ) in exhaust gas are reduced below a predetermined reference value. It is mandatory.
Therefore, even in an industrial vehicle equipped with a diesel engine, an exhaust gas purification device is attached upstream of the silencer of the exhaust pipe of the engine.
例えば、ディーゼルエンジンを搭載した従来のフォークリフトは、車体の前部に作業装置を備える一方、車体の後部に、作業装置に及ぼされる荷重にバランスさせるためのカウンターウェイト部を備えており、エンジンは、カウンターウェイト部の前方において車体に取り付けられている(例えば、特許文献1、2参照)。また、カウンターウェイト部の内部には、車体の前後方向にのびる通気路が設けられている。
For example, a conventional forklift equipped with a diesel engine includes a working device at the front of the vehicle body, and a counterweight portion for balancing the load exerted on the working device at the rear of the vehicle body. It is attached to the vehicle body in front of the counterweight part (see, for example, Patent Documents 1 and 2). An air passage extending in the front-rear direction of the vehicle body is provided inside the counterweight portion.
さらに、エンジンの後方で、かつ通気路の前端開口の直前または通気路の前部には、ラジエータが配置され、エンジンおよびラジエータ間に、ラジエータを冷却するラジエータファンが配置されている。そして、ラジエータファンの回転によって生じる気流が通気路を通って車体の外部に排出されるようになっている。
Furthermore, a radiator is disposed behind the engine and immediately before the front end opening of the air passage or in front of the air passage, and a radiator fan for cooling the radiator is disposed between the engine and the radiator. The airflow generated by the rotation of the radiator fan is discharged to the outside of the vehicle body through the air passage.
フォークリフトは、また、車体に支持されるとともに、一端がエンジンに接続され、他端が車体の後部から外部に突出した排気管と、排気管の途中に設けられた排気ガス浄化装置および消音器を備えている。
排気ガス浄化装置および消音器は、通常、円筒状の外形を有し、フォークリフトのサイズが小さい場合には、当該フォークリフトにおける相対的に大きな構成ユニットとなる。 The forklift is also supported by the vehicle body, and has an exhaust pipe whose one end is connected to the engine and the other end protrudes outside from the rear part of the vehicle body, and an exhaust gas purifying device and a silencer provided in the middle of the exhaust pipe. I have.
The exhaust gas purification device and the silencer usually have a cylindrical outer shape, and when the size of the forklift is small, the exhaust gas purification device and the silencer become a relatively large constituent unit in the forklift.
排気ガス浄化装置および消音器は、通常、円筒状の外形を有し、フォークリフトのサイズが小さい場合には、当該フォークリフトにおける相対的に大きな構成ユニットとなる。 The forklift is also supported by the vehicle body, and has an exhaust pipe whose one end is connected to the engine and the other end protrudes outside from the rear part of the vehicle body, and an exhaust gas purifying device and a silencer provided in the middle of the exhaust pipe. I have.
The exhaust gas purification device and the silencer usually have a cylindrical outer shape, and when the size of the forklift is small, the exhaust gas purification device and the silencer become a relatively large constituent unit in the forklift.
また、排気ガス浄化装置の作動温度はかなり高温(400~800℃程度)であり、しかも排気ガス浄化装置はそれに導入される排気ガスによって加熱されるようになっているので、排気ガス浄化装置はできるだけエンジンのエキゾーストマニホールドに近い位置に配置されることが好ましい。
Further, the operating temperature of the exhaust gas purification device is quite high (about 400 to 800 ° C.), and the exhaust gas purification device is heated by the exhaust gas introduced into the exhaust gas purification device. It is preferable that it be arranged as close as possible to the exhaust manifold of the engine.
こうして、排気管、排気ガス浄化装置および消音器からなるエンジン排気系を車体のどの場所に配置するのかが問題となるが、この場合、エンジン、ラジエータ、ラジエータファンおよびカウンターウェイト部の車体上の配置(相互の位置関係)は、フォークリフトの構造上の理由から、既存の配置に変更を加えないことが望ましい。
Thus, the location of the engine exhaust system including the exhaust pipe, the exhaust gas purification device and the silencer is a problem in the vehicle body. In this case, the engine, the radiator, the radiator fan, and the counterweight unit are disposed on the vehicle body. It is desirable that (the mutual positional relationship) does not change the existing arrangement for the structural reasons of the forklift.
そこで、従来技術においては、車体のコンパクト化、運転者の視界の確保、運転者の火傷防止、排気ガス浄化装置のメンテナンスのし易さ等を考慮して、エンジン排気系がカウンターウェイト部の内部に収容され、そして、排気ガス浄化装置がラジエータの後面に対向して配置される(例えば、特許文献1、2参照)。
Therefore, in the prior art, the engine exhaust system is installed inside the counterweight part in consideration of compactness of the vehicle body, securing of the driver's view, prevention of burns of the driver, ease of maintenance of the exhaust gas purification device, etc. And an exhaust gas purification device is disposed to face the rear surface of the radiator (see, for example, Patent Documents 1 and 2).
しかし、この構成によれば、回転するラジエータファンから冷却空気が排気ガス浄化装置に直接吹き付けて排気ガス浄化装置が冷却される一方、ラジエータは排気ガス浄化装置からの放出熱をまともに受けて加熱され、それによって、ラジエータによるエンジン冷却水の冷却効率および排気ガス浄化装置による排気ガス浄化効率がいずれも悪くなるという問題があった。
However, according to this configuration, the cooling air is directly blown from the rotating radiator fan to the exhaust gas purification device to cool the exhaust gas purification device, while the radiator receives the heat released from the exhaust gas purification device and heats it properly. As a result, the cooling efficiency of the engine cooling water by the radiator and the exhaust gas purification efficiency by the exhaust gas purification device are both deteriorated.
したがって、本発明の課題は、ラジエータによる冷却効率および排気ガス浄化装置による排気ガス浄化効率をいずれも低下させることなく、エンジンの排気系をカウンターウェイト部に収容できるようにすることにある。
Therefore, an object of the present invention is to enable the engine exhaust system to be accommodated in the counterweight portion without reducing both the cooling efficiency by the radiator and the exhaust gas purification efficiency by the exhaust gas purification device.
上記課題を解決するため、本発明によれば、車体の前部に取り付けられた作業装置と、前記車体の後部に配置され、前記作業装置に及ぼされる荷重にバランスさせるためのカウンターウェイト部と、を備え、前記カウンターウェイト部の内部には、前記車体の前後方向にのびる通気路が設けられており、さらに、前記車体に取り付けられて前記カウンターウェイト部の前方に配置された動力源としてのエンジンと、前記エンジンの後方でかつ前記通気路の前端開口の直前、または前記通気路の前部に配置されたラジエータと、前記エンジンおよび前記ラジエータ間に配置された、前記ラジエータを冷却するラジエータファンと、を備え、前記ラジエータファンの回転によって生じる気流が前記通気路を通って前記車体の外部に排出されるようになっており、さらに、前記車体に支持されるとともに、一端が前記エンジンに接続され、他端が前記車体の後部から外部に突出した排気管と、前記排気管の途中に設けられた排気ガス浄化装置および消音器と、を備えた産業用車両において、前記通気路の前部の底面と前記通気路の後部の底面との間に段差が形成されかつ前記後部の底面が前記前部の底面よりも低くなっており、前記排気ガス浄化装置および前記消音器が、前記通気路の後部において、前記排気ガス浄化装置が前記消音器の下になるように上下に並んでかつ前記排気ガス浄化装置が前記通気路の前部の底面よりも低い位置にあるように配置されていることを特徴とする産業用車両が提供される。
In order to solve the above problems, according to the present invention, a working device attached to a front portion of a vehicle body, a counter weight portion disposed at a rear portion of the vehicle body, for balancing the load exerted on the working device, An air passage extending in the front-rear direction of the vehicle body, and an engine as a power source that is attached to the vehicle body and disposed in front of the counterweight portion. A radiator disposed behind the engine and immediately before the front end opening of the air passage or in front of the air passage; and a radiator fan disposed between the engine and the radiator for cooling the radiator. The air flow generated by the rotation of the radiator fan is exhausted to the outside of the vehicle body through the air passage. And an exhaust pipe that is supported by the vehicle body, has one end connected to the engine, and has the other end protruding from the rear of the vehicle body to the outside, and an exhaust gas provided in the middle of the exhaust pipe In an industrial vehicle including a purification device and a silencer, a step is formed between a bottom surface of a front portion of the air passage and a bottom surface of a rear portion of the air passage, and the bottom surface of the rear portion is a bottom surface of the front portion. The exhaust gas purifying device and the silencer are arranged side by side in the rear part of the ventilation path so that the exhaust gas purifying device is below the silencer and the exhaust gas purifying device. Is disposed so as to be lower than the bottom surface of the front portion of the air passage.
本発明の好ましい実施例によれば、前記排気ガス浄化装置および前記消音器は、それぞれ、円筒状の外形を有し、前記車体の左右方向にのびている。
本発明の別の好ましい実施例によれば、前記ラジエータが前記通気路の前部の底面に立設されている。 According to a preferred embodiment of the present invention, each of the exhaust gas purification device and the silencer has a cylindrical outer shape and extends in the left-right direction of the vehicle body.
According to another preferred embodiment of the present invention, the radiator is erected on the bottom surface of the front portion of the air passage.
本発明の別の好ましい実施例によれば、前記ラジエータが前記通気路の前部の底面に立設されている。 According to a preferred embodiment of the present invention, each of the exhaust gas purification device and the silencer has a cylindrical outer shape and extends in the left-right direction of the vehicle body.
According to another preferred embodiment of the present invention, the radiator is erected on the bottom surface of the front portion of the air passage.
本発明のさらに別の好ましい実施例によれば、前記排気管は、前記エンジンから、前記カウンターウェイト部の内部の前記通気路の前部よりも低い位置を貫通して前記排気ガス浄化装置までのびる第1の部分と、前記排気ガス浄化装置および前記消音器間にのびる第2の部分と、前記消音器から上向きに前記通気路を横切ってのびた後、前記カウンターウェイト部の上壁から外部に突出する第3の部分とからなっている。
本発明のさらに別の好ましい実施例によれば、前記産業用車両がフォークリフトからなっている。 According to still another preferred embodiment of the present invention, the exhaust pipe extends from the engine to a position lower than a front portion of the air passage inside the counterweight portion to the exhaust gas purification device. A first portion, a second portion extending between the exhaust gas purifying device and the silencer, and extending upward from the silencer across the air passage and then projecting outward from the upper wall of the counterweight portion It consists of a third part.
According to still another preferred embodiment of the present invention, the industrial vehicle comprises a forklift.
本発明のさらに別の好ましい実施例によれば、前記産業用車両がフォークリフトからなっている。 According to still another preferred embodiment of the present invention, the exhaust pipe extends from the engine to a position lower than a front portion of the air passage inside the counterweight portion to the exhaust gas purification device. A first portion, a second portion extending between the exhaust gas purifying device and the silencer, and extending upward from the silencer across the air passage and then projecting outward from the upper wall of the counterweight portion It consists of a third part.
According to still another preferred embodiment of the present invention, the industrial vehicle comprises a forklift.
本発明によれば、産業用車両のカウンターウェイト部の内部に設けられた通気路の前部の底面と後部の底面との間に段差を形成しかつ後部の底面が前部の底面よりも低くなるようにし、排気ガス浄化装置および消音器を、通気路の後部において、排気ガス浄化装置が消音器の下になるように上下に並べてかつ排気ガス浄化装置が通気路の前部の底面よりも低い位置にあるように配置したので、産業用車両の運転中に、排気ガス浄化装置がラジエータファンからの冷却空気を直接受けること、およびラジエータが排気ガス浄化装置からの放出熱をまともに受けることがなくなり、排気ガス浄化装置の無駄な冷却およびラジエータの無駄な加熱が最小限に抑えられる。
According to the present invention, a step is formed between the front bottom surface and the rear bottom surface of the air passage provided in the counterweight portion of the industrial vehicle, and the rear bottom surface is lower than the front bottom surface. The exhaust gas purifying device and the silencer are arranged one above the other so that the exhaust gas purifying device is below the silencer at the rear of the vent passage, and the exhaust gas purifying device is more than the bottom of the front portion of the vent passage. Because it is placed at a low position, the exhaust gas purifier directly receives the cooling air from the radiator fan and the radiator receives the heat released from the exhaust gas purifier while the industrial vehicle is in operation. This eliminates wasteful cooling of the exhaust gas purification device and wasteful heating of the radiator.
こうして、排気ガス浄化装置による排気ガス浄化効率およびラジエータによる冷却効率を低下させることなく、エンジンの排気系をカウンターウェイト部の内部にコンパクトに収容することができる。
さらには、排気ガス浄化装置および消音器の収容スペースとして、カウンターウェイト部の通気路の後部、すなわち、カウンターウェイト部の後部の空間を利用したことで産業用車両の既存の構造に殆ど変更を加える必要がなく、そのため、本発明は既存の産業用車両に対しても極めて低コストで適用することができる。 Thus, the exhaust system of the engine can be accommodated in the counterweight portion in a compact manner without reducing the exhaust gas purification efficiency by the exhaust gas purification device and the cooling efficiency by the radiator.
Furthermore, the existing structure of the industrial vehicle is almost changed by using the rear part of the vent passage of the counterweight part, that is, the rear part of the counterweight part, as the storage space for the exhaust gas purification device and the silencer. Therefore, the present invention can be applied to existing industrial vehicles at a very low cost.
さらには、排気ガス浄化装置および消音器の収容スペースとして、カウンターウェイト部の通気路の後部、すなわち、カウンターウェイト部の後部の空間を利用したことで産業用車両の既存の構造に殆ど変更を加える必要がなく、そのため、本発明は既存の産業用車両に対しても極めて低コストで適用することができる。 Thus, the exhaust system of the engine can be accommodated in the counterweight portion in a compact manner without reducing the exhaust gas purification efficiency by the exhaust gas purification device and the cooling efficiency by the radiator.
Furthermore, the existing structure of the industrial vehicle is almost changed by using the rear part of the vent passage of the counterweight part, that is, the rear part of the counterweight part, as the storage space for the exhaust gas purification device and the silencer. Therefore, the present invention can be applied to existing industrial vehicles at a very low cost.
以下、添付図面を参照して本発明の好ましい実施例を説明する。
図1は、本発明の1実施例による産業用車両の全体の構成を概略的に示す側面図である。図1に示されるように、この実施例では、産業用車両はフォークリフトの形態を有している。
図1を参照して、フォークリフトの車体1の前部には、作業装置としてのフォーク2が取り付けられる一方、車体1の後部には、フォーク2に及ぼされる荷重にバランスさせるためのカウンターウェイト部3が配置される。また、車体1におけるカウンターウェイト部3の前方には、動力源としてのエンジン(ディーゼルエンジン)4が備えられる。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view schematically showing the overall configuration of an industrial vehicle according to an embodiment of the present invention. As shown in FIG. 1, in this embodiment, the industrial vehicle has the form of a forklift.
Referring to FIG. 1, afork 2 as a working device is attached to the front part of a vehicle body 1 of a forklift, while a counterweight part 3 for balancing the load exerted on the fork 2 is attached to the rear part of the vehicle body 1. Is placed. Further, an engine (diesel engine) 4 as a power source is provided in front of the counterweight portion 3 in the vehicle body 1.
図1は、本発明の1実施例による産業用車両の全体の構成を概略的に示す側面図である。図1に示されるように、この実施例では、産業用車両はフォークリフトの形態を有している。
図1を参照して、フォークリフトの車体1の前部には、作業装置としてのフォーク2が取り付けられる一方、車体1の後部には、フォーク2に及ぼされる荷重にバランスさせるためのカウンターウェイト部3が配置される。また、車体1におけるカウンターウェイト部3の前方には、動力源としてのエンジン(ディーゼルエンジン)4が備えられる。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view schematically showing the overall configuration of an industrial vehicle according to an embodiment of the present invention. As shown in FIG. 1, in this embodiment, the industrial vehicle has the form of a forklift.
Referring to FIG. 1, a
図2は、このフォークリフトのカウンターウェイト部3の構造の概略を示す車体1の中心軸方向に沿った断面図であり、図3は、図2に示されたカウンターウェイト部3の内部の主要な構成要素を示す斜視図である。
図2を参照して、カウンターウェイト部3は、上壁3a、後壁3bおよび左右の側壁(図示されない)を有しており、カウンターウェイト部3の内部には、車体1の前後方向にのび、前端開口が空気入口5aをなし、後端開口が空気出口5bをなす通気路5が設けられる。空気出口5bは、カウンターウェイト部3の後壁3bに設けられる。 FIG. 2 is a cross-sectional view taken along the central axis direction of thevehicle body 1 showing an outline of the structure of the counterweight portion 3 of the forklift. FIG. 3 is a schematic view of the main portion inside the counterweight portion 3 shown in FIG. It is a perspective view which shows a component.
Referring to FIG. 2, thecounterweight portion 3 has an upper wall 3 a, a rear wall 3 b, and left and right side walls (not shown), and the counterweight portion 3 extends in the front-rear direction of the vehicle body 1. A vent path 5 is provided in which the front end opening forms the air inlet 5a and the rear end opening forms the air outlet 5b. The air outlet 5 b is provided on the rear wall 3 b of the counterweight portion 3.
図2を参照して、カウンターウェイト部3は、上壁3a、後壁3bおよび左右の側壁(図示されない)を有しており、カウンターウェイト部3の内部には、車体1の前後方向にのび、前端開口が空気入口5aをなし、後端開口が空気出口5bをなす通気路5が設けられる。空気出口5bは、カウンターウェイト部3の後壁3bに設けられる。 FIG. 2 is a cross-sectional view taken along the central axis direction of the
Referring to FIG. 2, the
通気路5は、前部6の底面6aと後部7の底面との間に段差14が形成され、かつ、後部7の底面が前部6の底面6aよりも低くなるように形成される。なお、この実施例では、通気路5の前部6の底面6aは、カウンターウェイトまたは車体9の表面の一部から形成されており、通気路5の後部7の底面は開口している。
The ventilation path 5 is formed such that a step 14 is formed between the bottom surface 6 a of the front portion 6 and the bottom surface of the rear portion 7, and the bottom surface of the rear portion 7 is lower than the bottom surface 6 a of the front portion 6. In this embodiment, the bottom surface 6a of the front portion 6 of the air passage 5 is formed from a part of the surface of the counterweight or the vehicle body 9, and the bottom surface of the rear portion 7 of the air passage 5 is open.
通気路5の前部6には、エンジン冷却水を冷却するためのラジエータ8が配置されている。ラジエータ8は、空気入口5aおよび空気出口5bに対向する配置で、通気路5の前部6の底面6aに立設されている。
なお、この実施例では、ラジエータ8が通気路5の前部6に配置されるが、必要に応じて、ラジエータ8をエンジン4の後方でかつ通気路5の空気入口5aの直前に配置することもできる。 Aradiator 8 for cooling the engine coolant is disposed in the front portion 6 of the air passage 5. The radiator 8 is erected on the bottom surface 6 a of the front portion 6 of the air passage 5 so as to face the air inlet 5 a and the air outlet 5 b.
In this embodiment, theradiator 8 is disposed at the front portion 6 of the air passage 5, but if necessary, the radiator 8 is disposed behind the engine 4 and immediately before the air inlet 5 a of the air passage 5. You can also.
なお、この実施例では、ラジエータ8が通気路5の前部6に配置されるが、必要に応じて、ラジエータ8をエンジン4の後方でかつ通気路5の空気入口5aの直前に配置することもできる。 A
In this embodiment, the
エンジン4およびラジエータ8間には、ラジエータ8を冷却するラジエータファン10が配置されている。ラジエータファン10は、ラジエータ8の前面に対向して配置され、その回転軸10aがエンジン4に連結されている。ラジエータファン10はエンジン4によって回転駆動される。
こうして、ラジエータファン10の回転によって生じる気流は、通気路5を通って空気出口5bから車体1の外部に排出される。 Aradiator fan 10 that cools the radiator 8 is disposed between the engine 4 and the radiator 8. The radiator fan 10 is disposed so as to face the front surface of the radiator 8, and its rotating shaft 10 a is connected to the engine 4. The radiator fan 10 is rotationally driven by the engine 4.
Thus, the air flow generated by the rotation of theradiator fan 10 passes through the air passage 5 and is discharged from the air outlet 5b to the outside of the vehicle body 1.
こうして、ラジエータファン10の回転によって生じる気流は、通気路5を通って空気出口5bから車体1の外部に排出される。 A
Thus, the air flow generated by the rotation of the
フォークリフトは、さらに、車体1に支持されるとともに、一端がエンジン4に接続され、他端が車体1の後部から外部に突出した排気管11と、排気管11の途中に設けられた排気ガス浄化装置12および消音器13を備えている。
排気ガス浄化装置12は、例えば、DPF(Diesel Particulate Filter)およびDOC(Diesel Oxidation Catalyst)等からなっている。 The forklift is further supported by thevehicle body 1, one end is connected to the engine 4, and the other end protrudes outside from the rear part of the vehicle body 1, and exhaust gas purification provided in the middle of the exhaust pipe 11. A device 12 and a silencer 13 are provided.
The exhaustgas purification device 12 includes, for example, a DPF (Diesel Particulate Filter) and a DOC (Diesel Oxidation Catalyst).
排気ガス浄化装置12は、例えば、DPF(Diesel Particulate Filter)およびDOC(Diesel Oxidation Catalyst)等からなっている。 The forklift is further supported by the
The exhaust
この実施例では、排気ガス浄化装置12および消音器13はそれぞれ円筒状の外形を有している。そして、排気ガス浄化装置12および消音器13は、通気路5の後部7において、それぞれが車体1の左右方向にのびるとともに、排気ガス浄化装置12が消音器13の下になるように上下に並んで、かつ、排気ガス浄化装置12が通気路5の前部6の底面よりも低い位置にあるように配置される。
In this embodiment, the exhaust gas purification device 12 and the silencer 13 each have a cylindrical outer shape. The exhaust gas purifying device 12 and the silencer 13 are arranged vertically in the rear portion 7 of the air passage 5 so that each extends in the left-right direction of the vehicle body 1 and the exhaust gas purifying device 12 is below the silencer 13. In addition, the exhaust gas purification device 12 is disposed at a position lower than the bottom surface of the front portion 6 of the ventilation path 5.
図示はしないが、排気ガス浄化装置12および消音器13は、それぞれ、所定の位置において、ボルトおよびナットを用いて車体1に直接固定され、あるいは、適当な支持部材を介して車体1に固定されている。
Although not shown, the exhaust gas purification device 12 and the silencer 13 are fixed directly to the vehicle body 1 using bolts and nuts at predetermined positions, or are fixed to the vehicle body 1 via appropriate support members. ing.
排気管11は、エンジン4(エンジン4のエキゾーストマニホールド(図示されない))から、カウンターウェイト部3の内部の通気路5の前部6よりも低い位置を貫通して排気ガス浄化装置12の一方の端面12aまでのびる第1の部分11aと、排気ガス浄化装置12の他方の端面12b側において、排気ガス浄化装置12の端面12bと消音器13の端面13b同士を接続する第2の部分11bと、消音器13の他方の端面13aから上向きに通気路5を横切ってのびた後、カウンターウェイト部3の上壁3aから外部に突出する第3の部分11cとからなっている。
The exhaust pipe 11 passes from the engine 4 (exhaust manifold (not shown) of the engine 4) through a position lower than the front portion 6 of the air passage 5 inside the counterweight portion 3, and is connected to one of the exhaust gas purification devices 12. A first portion 11a extending to the end surface 12a, and a second portion 11b connecting the end surface 12b of the exhaust gas purification device 12 and the end surface 13b of the silencer 13 on the other end surface 12b side of the exhaust gas purification device 12, The third part 11c protrudes outward from the upper wall 3a of the counterweight part 3 after extending across the ventilation path 5 upward from the other end face 13a of the silencer 13.
なお、この実施例では、排気管11の先端(排気口)がカウンターウェイト部3の上壁3aから上方に突出しているが、排気管11の先端(排気口)を車体1から突出させる位置はこの実施例に限定されず、例えば、排気管11の先端(排気口)が車体1の後部の低い位置から突出する構成としてもよい。
In this embodiment, the tip end (exhaust port) of the exhaust pipe 11 protrudes upward from the upper wall 3a of the counterweight portion 3. However, the position where the tip end (exhaust port) of the exhaust pipe 11 projects from the vehicle body 1 is as follows. For example, the front end (exhaust port) of the exhaust pipe 11 may protrude from a lower position of the rear portion of the vehicle body 1.
また、この実施例では、排気管11の第1~第3の部分11a~11cがいずれも排気ガス浄化装置12および消音器13の端面12a、12b;13a、13bに接続されているが、第1~第3の部分11a~11cの排気ガス浄化装置12および消音器13に対する接続位置はこの実施例に限定されず、例えば、第1~第3の部分11a~11cが排気ガス浄化装置12および消音器13の端部周面に接続される構成としてもよい。
Further, in this embodiment, the first to third portions 11a to 11c of the exhaust pipe 11 are all connected to the exhaust gas purifying device 12 and the end faces 12a and 12b; 13a and 13b of the silencer 13. The connection positions of the first to third portions 11a to 11c to the exhaust gas purification device 12 and the silencer 13 are not limited to this embodiment. For example, the first to third portions 11a to 11c are connected to the exhaust gas purification device 12 and It is good also as a structure connected to the edge part peripheral surface of the silencer 13. FIG.
こうして、排気ガス浄化装置12および消音器13を、通気路5の後部7において、排気ガス浄化装置12が消音器13の下になるように上下に並べてかつ排気ガス浄化装置12が通気路5の前部6の底面6aよりも低い位置にあるように配置したので、フォークリフトの運転中に、排気ガス浄化装置12がラジエータファン10からの冷却空気を直接受けること、およびラジエータ8が排気ガス浄化装置12からの放出熱をまともに受けることがなく、排気ガス浄化装置12の無駄な冷却およびラジエータ8の無駄な加熱が最小限に抑えられる。そして、排気ガス浄化装置12による排気ガス浄化効率およびラジエータ8による冷却効率を低下させることなく、エンジン4の排気系をカウンターウェイト部3の内部にコンパクトに収容することができる。
Thus, the exhaust gas purifying device 12 and the silencer 13 are arranged one above the other in the rear portion 7 of the vent passage 5 so that the exhaust gas purifying device 12 is below the silencer 13 and the exhaust gas purifying device 12 is connected to the vent passage 5. Since it is disposed at a position lower than the bottom surface 6a of the front portion 6, the exhaust gas purification device 12 directly receives the cooling air from the radiator fan 10 during the operation of the forklift, and the radiator 8 is the exhaust gas purification device. Accordingly, the exhaust heat from the exhaust gas purifying device 12 and the wasteful heating of the radiator 8 can be minimized. The exhaust system of the engine 4 can be accommodated in the counterweight unit 3 in a compact manner without reducing the exhaust gas purification efficiency by the exhaust gas purification device 12 and the cooling efficiency by the radiator 8.
また、排気ガス浄化装置12および消音器13の収容スペースとして、カウンターウェイト部3の通気路5の後部7、すなわち、カウンターウェイト部3の後部空間を利用したことでフォークリフトの既存の構造に殆ど変更を加える必要がなく、そのため、本発明は既存のフォークリフトに対しても極めて低コストで適用することができる。
Further, as the accommodation space for the exhaust gas purification device 12 and the silencer 13, the rear portion 7 of the air passage 5 of the counterweight portion 3, that is, the rear space of the counterweight portion 3 is used, so that it is almost changed to the existing structure of the forklift. Therefore, the present invention can be applied to an existing forklift at an extremely low cost.
加えて、この実施例によれば、エンジン4(エキゾーストマニホールド)および排気ガス浄化装置12間を最短距離で接続できるとともに、排気管11のエンジン4および排気ガス浄化装置12間にのびる部分11aを、ラジエータファン10からの冷却空気を殆ど受けない領域に配置することができ、それによって、エンジン4からの排気ガスを高温状態に維持した状態で排気ガス浄化装置12に供給することで、排気ガス浄化装置12による排気ガス浄化効率をより一層高めることができる。
In addition, according to this embodiment, the engine 4 (exhaust manifold) and the exhaust gas purification device 12 can be connected at the shortest distance, and the portion 11a of the exhaust pipe 11 extending between the engine 4 and the exhaust gas purification device 12 is The exhaust gas can be disposed in a region that hardly receives the cooling air from the radiator fan 10, thereby supplying the exhaust gas from the engine 4 to the exhaust gas purification device 12 while maintaining the high temperature state. The exhaust gas purification efficiency by the device 12 can be further increased.
なお、この実施例では産業用車両はフォークリフトからなっているが、本発明が適用可能な産業用車両はフォークリフトに限定されない。そして、本発明は、車体の前部に作業装置を備え、車体の後部には、作業装置に及ぼされる荷重にバランスさせるためのカウンターウェイト部を備えた任意の産業用車両に適用することができる。
In this embodiment, the industrial vehicle is a forklift, but the industrial vehicle to which the present invention is applicable is not limited to a forklift. The present invention can be applied to any industrial vehicle having a working device at the front portion of the vehicle body and a counterweight portion for balancing the load exerted on the working device at the rear portion of the vehicle body. .
1 車体
2 フォーク(作業装置)
3 カウンターウェイト部
3a 上壁
3b 後壁
4 エンジン
5 通気路
5a 空気入口
5b 空気出口
6 前部
6a 底面
7 後部
8 ラジエータ
9 カウンターウェイトまたは車体
10 ラジエータファン
10a 回転軸
11 排気管
11a 第1の部分
11b 第2の部分
11c 第3の部分
12 排気ガス浄化装置
12a、12b 端面
13 消音器
13a、13b 端面
14 段差 1Body 2 Fork (Working device)
3Counterweight part 3a Upper wall 3b Rear wall 4 Engine 5 Ventilation path 5a Air inlet 5b Air outlet 6 Front part 6a Bottom face 7 Rear part 8 Radiator 9 Counterweight or vehicle body 10 Radiator fan 10a Rotating shaft 11 Exhaust pipe 11a First part 11b 2nd part 11c 3rd part 12 Exhaust- gas purification apparatus 12a, 12b End surface 13 Silencer 13a, 13b End surface 14 Level difference
2 フォーク(作業装置)
3 カウンターウェイト部
3a 上壁
3b 後壁
4 エンジン
5 通気路
5a 空気入口
5b 空気出口
6 前部
6a 底面
7 後部
8 ラジエータ
9 カウンターウェイトまたは車体
10 ラジエータファン
10a 回転軸
11 排気管
11a 第1の部分
11b 第2の部分
11c 第3の部分
12 排気ガス浄化装置
12a、12b 端面
13 消音器
13a、13b 端面
14 段差 1
3
Claims (5)
- 車体の前部に取り付けられた作業装置と、
前記車体の後部に配置され、前記作業装置に及ぼされる荷重にバランスさせるためのカウンターウェイト部と、を備え、前記カウンターウェイト部の内部には、前記車体の前後方向にのびる通気路が設けられており、さらに、
前記車体に取り付けられて前記カウンターウェイト部の前方に配置された動力源としてのエンジンと、
前記エンジンの後方でかつ前記通気路の前端開口の直前、または前記通気路の前部に配置されたラジエータと、
前記エンジンおよび前記ラジエータ間に配置された、前記ラジエータを冷却するラジエータファンと、を備え、前記ラジエータファンの回転によって生じる気流が前記通気路を通って前記車体の外部に排出されるようになっており、さらに、
前記車体に支持されるとともに、一端が前記エンジンに接続され、他端が前記車体の後部から外部に突出した排気管と、
前記排気管の途中に設けられた排気ガス浄化装置および消音器と、を備えた産業用車両において、
前記通気路の前部の底面と前記通気路の後部の底面との間に段差が形成されかつ前記後部の底面が前記前部の底面よりも低くなっており、前記排気ガス浄化装置および前記消音器が、前記通気路の後部において、前記排気ガス浄化装置が前記消音器の下になるように上下に並んでかつ前記排気ガス浄化装置が前記通気路の前部の底面よりも低い位置にあるように配置されていることを特徴とする産業用車両。 A working device attached to the front of the vehicle body;
A counterweight portion disposed at a rear portion of the vehicle body for balancing the load exerted on the working device, and an air passage extending in the front-rear direction of the vehicle body is provided inside the counterweight portion. In addition,
An engine as a power source attached to the vehicle body and disposed in front of the counterweight part;
A radiator disposed behind the engine and immediately before the front end opening of the air passage, or in front of the air passage;
A radiator fan disposed between the engine and the radiator for cooling the radiator, and an air flow generated by the rotation of the radiator fan is discharged to the outside of the vehicle body through the air passage. In addition,
An exhaust pipe that is supported by the vehicle body, one end of which is connected to the engine, and the other end of the vehicle body that protrudes from the rear portion;
In an industrial vehicle comprising an exhaust gas purification device and a silencer provided in the middle of the exhaust pipe,
A step is formed between the bottom surface of the front part of the ventilation path and the bottom surface of the rear part of the ventilation path, and the bottom surface of the rear part is lower than the bottom surface of the front part, and the exhaust gas purification device and the muffler In the rear part of the air passage so that the exhaust gas purifying device is located below the silencer and the exhaust gas purifying device is lower than the bottom surface of the front part of the air passage An industrial vehicle characterized by being arranged as described above. - 前記排気ガス浄化装置および前記消音器は、それぞれ、円筒状の外形を有し、前記車体の左右方向にのびていることを特徴とする請求項1に記載の産業用車両。 The industrial vehicle according to claim 1, wherein each of the exhaust gas purifying device and the silencer has a cylindrical outer shape and extends in a left-right direction of the vehicle body.
- 前記ラジエータが前記通気路の前部の底面に立設されていることを特徴とする請求項1または請求項2に記載の産業用車両。 The industrial vehicle according to claim 1 or 2, wherein the radiator is erected on a bottom surface of a front portion of the air passage.
- 前記排気管は、前記エンジンから、前記カウンターウェイト部の内部の前記通気路の前部よりも低い位置を貫通して前記排気ガス浄化装置までのびる第1の部分と、前記排気ガス浄化装置および前記消音器間にのびる第2の部分と、前記消音器から上向きに前記通気路を横切ってのびた後、前記カウンターウェイト部の上壁から外部に突出する第3の部分とからなっていることを特徴とする請求項1~請求項3のいずれかに記載の産業用車両。 The exhaust pipe extends from the engine through a position lower than the front portion of the ventilation path inside the counterweight portion to the exhaust gas purification device, the exhaust gas purification device, and the A second portion extending between the silencers, and a third portion protruding outward from the upper wall of the counterweight portion after extending across the ventilation path upward from the silencer. The industrial vehicle according to any one of claims 1 to 3.
- 前記産業用車両がフォークリフトからなっていることを特徴とする請求項1~請求項4のいずれかに記載の産業用車両。 The industrial vehicle according to any one of claims 1 to 4, wherein the industrial vehicle is a forklift.
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JP2009292363A (en) * | 2008-06-06 | 2009-12-17 | Komatsu Utility Co Ltd | Working vehicle |
JP2010209814A (en) * | 2009-03-11 | 2010-09-24 | Yanmar Co Ltd | Combine harvester |
JP2010216389A (en) * | 2009-03-17 | 2010-09-30 | Yanmar Co Ltd | Engine device to be mounted on work vehicle |
JP2012106836A (en) * | 2010-11-17 | 2012-06-07 | Tcm Corp | Diesel particulate filter mounting structure for industrial vehicle |
JP2012184602A (en) * | 2011-03-07 | 2012-09-27 | Hitachi Constr Mach Co Ltd | Work machine |
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2014
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- 2014-08-21 WO PCT/JP2014/071868 patent/WO2016027344A1/en active Application Filing
Patent Citations (6)
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JP2009292363A (en) * | 2008-06-06 | 2009-12-17 | Komatsu Utility Co Ltd | Working vehicle |
JP2010209814A (en) * | 2009-03-11 | 2010-09-24 | Yanmar Co Ltd | Combine harvester |
JP2010216389A (en) * | 2009-03-17 | 2010-09-30 | Yanmar Co Ltd | Engine device to be mounted on work vehicle |
JP2012106836A (en) * | 2010-11-17 | 2012-06-07 | Tcm Corp | Diesel particulate filter mounting structure for industrial vehicle |
JP2012184602A (en) * | 2011-03-07 | 2012-09-27 | Hitachi Constr Mach Co Ltd | Work machine |
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