JP5445314B2

JP5445314B2 - Working part structure of work vehicle

Info

Publication number: JP5445314B2
Application number: JP2010106040A
Authority: JP
Inventors: 西崎　　宏; 淳水島; 次郎山本; 一実五島; 寛之森本
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2010-05-02
Filing date: 2010-05-02
Publication date: 2014-03-19
Anticipated expiration: 2030-05-02
Also published as: JP2011235663A

Description

この発明は、作業車輌の原動部構造に関するものである。 The present invention relates to a driving part structure of a work vehicle.

従来より、コンバイン等の作業車輌の原動部は、ラジエータの内側に冷却ファンを備え、該ラジエータの外側には前記冷却ファンの吸引作用によって吸入される外気を濾過する防塵網を備えた構成である。
しかしながら、作業中に発生する藁屑等の塵埃が、この防塵網の外側面に吸着されてこの濾過孔を塞ぎ、外気の吸入が阻害されてエンジンがオーバーヒートする問題があった。
そこで、下記特許文献１に開示されているように、ラジエータと防塵網との間に多孔板を配置し、この多孔板の外側面に、外気の吸入を許容する通気状態と、外気の吸入を阻止する遮蔽状態とに切り替えるシャッター板を重合させて配置する技術が試みられた。即ち、冷却ファンによる外気の吸入を一時的に阻止することで、防塵網および多孔板の外側面での吸着力をなくし、吸着されていた塵埃を脱落させようとするものである。
また、更に積極的に塵埃を除去するために、下記特許文献２に開示されているように、冷却ファンの翼角度を反転させる技術が試みられている。即ち、回転方向を同一方向としたまま翼角度を反転させることで、防塵網の内側から外側方へ塵埃除去用の風を吹き出させ、防塵網の外側面に吸着されていた塵埃を吹き飛ばそうとするものである。 2. Description of the Related Art Conventionally, a driving part of a work vehicle such as a combiner has a configuration in which a cooling fan is provided inside a radiator, and a dustproof net that filters outside air sucked by the suction action of the cooling fan is provided outside the radiator. .
However, dust such as soot generated during the operation is adsorbed on the outer surface of the dust screen and closes the filter hole, and the intake of outside air is obstructed, causing the engine to overheat.
Therefore, as disclosed in Patent Document 1 below, a perforated plate is disposed between the radiator and the dust net, and the outer surface of the perforated plate is provided with a ventilation state that allows inhalation of outside air, and inhalation of outside air. Attempts have been made to superimpose and arrange shutter plates that are switched to the blocking state for blocking. That is, by temporarily blocking the intake of outside air by the cooling fan, the adsorption force on the outer surface of the dustproof net and the perforated plate is eliminated, and the adsorbed dust is dropped.
Further, in order to remove dust more positively, as disclosed in Patent Document 2 below, a technique for reversing the blade angle of a cooling fan has been attempted. In other words, by reversing the blade angle while keeping the rotation direction in the same direction, the wind for dust removal is blown out from the inside of the dust screen to the outside, and the dust adsorbed on the outside surface of the dust screen is blown away. To do.

特開平７−９８６３号公報JP-A-7-9863 特開２００６−３７７４８号公報JP 2006-37748 A

しかしながら、上述の特許文献２に開示された技術では、冷却ファンの翼角度を反転させるための機構が複雑であるうえに、冷却ファンの翼角度を反転させて外側方へ風を吹き出している状態では、ラジエータ冷却用の外気が吸入されなくなり、エンジンがオーバーヒートしやすくなる問題がある。
また、上述の特許文献１に開示された技術でも、シャッター板によって遮蔽状態に切り替えた状態では、ラジエータ冷却用の外気が吸入されなくなり、エンジンがオーバーヒートしやすくなる問題がある。しかも、このように冷却ファンによる外気の吸入を一時的に阻止することで、防塵網および多孔板の外側面での吸着力をなくすだけでは、吸着されていた塵埃を積極的に除去することはできず、エンジンがオーバーヒートする問題を解消することはできない。 However, in the technique disclosed in Patent Document 2 described above, the mechanism for reversing the blade angle of the cooling fan is complicated, and the air is blown outward by reversing the blade angle of the cooling fan. Then, there is a problem that the outside air for cooling the radiator is not sucked and the engine is easily overheated.
Further, even the technique disclosed in Patent Document 1 described above has a problem in that the outside air for cooling the radiator is not sucked and the engine is easily overheated when the shutter plate is switched to the shielding state. In addition, by temporarily preventing the outside air from being sucked in by the cooling fan in this way, it is possible to positively remove the adsorbed dust simply by eliminating the suction force on the outer surface of the dustproof net and the perforated plate. The problem that the engine overheats cannot be solved.

この発明は、上記課題を解決するために、以下の技術的手段を講じる。
請求項１記載の発明は、ラジエータ（２４）の内側に冷却ファン（２２）を備え、該ラジエータ（２４）の外側には前記冷却ファン（２２）の吸引作用によって吸入される外気を濾過する濾過体（２９）を備えた作業車輌の原動部構造であって、前記ラジエータ（２４）と濾過体（２９）との間に、冷却ファン（２２）の吸引作用によって濾過体（２９）を通過してラジエータ（２４）側へ吸入される外気を遮蔽可能な遮風板（３０）を設け、該遮風板（３０）の一部には通風可能な通風部（３１）を形成し、該通風部（３１）を介して遮風板（３０）の外側方へ送風するファン（４１）を設け、前記冷却ファン（２２）による外気の吸入方向における遮風板（３０）とラジエータ（２４）との重合量を変更する方向へ該遮風板（３０）を移動自在な構成としたことを特徴とする作業車輌の原動部構造としたものである。
請求項２記載の発明は、前記ファン（４１）をエンジン（１４）及びラジエータ（２４）を覆う原動部カバー（１５）の外側の固定位置に設け、前記遮風板（３０）がラジエータ（２４）との重合量を増加させる方向へ移動した場合に、該遮風板（３０）の通風部（３１）とファン（４１）の送風部（３８）とが連通する構成としたことを特徴とする請求項１記載の作業車輌の原動部構造としたものである。
請求項３記載の発明は、前記遮風板（３０）がラジエータ（２４）との重合量を減少させる方向へ移動した場合に、ファン（４１）からの送風が遮風板（３０）の内側面で案内されてラジエータ（２４）側へ吸入される構成としたことを特徴とする請求項２記載の作業車輌の原動部構造としたものである。
請求項４記載の発明は、前記ファン（４１）をエンジン（１４）及びラジエータ（２４）を覆う原動部カバー（１５）の外側の固定位置に設け、前記通風部（３１）に、ファン（４１）からの送風を遮風板（３０）に対向する濾過体（２９）の内側面へ向けて斜めに案内するように傾斜した送風ダクト（３２）を設け、前記遮風板（３０）がラジエータ（２４）との重合量を増加させる方向へ移動した場合に、送風ダクト（３２）とファン（４１）の送風部（３８）とが連通し、遮風板（３０）がラジエータ（２４）との重合量を減少させる方向へ移動した場合には、送風ダクト（３２）とファン（４１）の送風部（３８）との連通が断たれ、ファン（４１）からの送風が送風ダクト（３２）下部の傾斜面（Ｓ）と遮風板（３０）の内側面で案内されてラジエータ（２４）側へ吸入される構成としたことを特徴とする請求項１記載の作業車輌の原動部構造としたものである。
請求項５記載の発明は、前記遮風板（３０）とラジエータ（２４）との重合量を減少させる方向へ遮風板（３０）をその移動端部まで移動させても、該遮風板（３０）の端部とラジエータ（２４）の一部との重合状態が維持される構成としたことを特徴とする請求項１または請求項２または請求項３または請求項４記載の作業車輌の原動部構造としたものである。
請求項６記載の発明は、前記濾過体（２９）を外側面に備えると共に遮風板（３０）を内蔵する第１吸気ダクト（２８）を前記原動部カバー（１５）の外側部に設け、該原動部カバー（１５）の前側に設けた吸気口（４２）から前記第１吸気ダクト（２８）における遮風板（３０）よりも内側の部位へ連通する第２吸気ダクト（４３）を設けたことを特徴とする請求項２または請求項３または請求項４記載の作業車輌の原動部構造としたものである。 In order to solve the above problems, the present invention takes the following technical means.
According to the first aspect of the present invention, the cooling fan (22) is provided inside the radiator (24), and the outside air sucked by the suction action of the cooling fan (22) is filtered outside the radiator (24). A working part drive vehicle structure including a body (29), wherein the filter (29) passes between the radiator (24) and the filter body (29) by a suction action of a cooling fan (22). An air shield plate (30) capable of shielding outside air sucked into the radiator (24) side is provided, and a ventilation portion (31) capable of passing air is formed in a part of the wind shield plate (30). A fan (41) for blowing air to the outside of the windshield plate (30) through the section (31), and the windshield plate (30) and the radiator (24) in the outside air suction direction by the cooling fan (22), Move the wind shield (30) in the direction to change the polymerization amount of Is obtained by a driving unit structure of a working vehicle, characterized in that a freely configured.
According to a second aspect of the present invention, the fan (41) is provided at a fixed position outside the prime mover cover (15) that covers the engine (14) and the radiator (24), and the wind shielding plate (30) is provided in the radiator (24). )), The ventilation portion (31) of the wind shielding plate (30) and the blower portion (38) of the fan (41) communicate with each other when the amount of polymerization is increased. According to a first aspect of the present invention, there is provided a driving part structure for a working vehicle.
According to a third aspect of the present invention, when the wind shield (30) moves in a direction to reduce the amount of polymerization with the radiator (24), the air from the fan (41) is blown into the wind shield (30). 3. The working portion structure for a working vehicle according to claim 2, wherein the structure is such that it is guided on a side surface and sucked into the radiator (24).
According to a fourth aspect of the present invention, the fan (41) is provided at a fixed position outside the prime mover cover (15) that covers the engine (14) and the radiator (24), and the fan (41) ) Is provided with an inclined air duct (32) that is inclined so as to guide obliquely toward the inner surface of the filter body (29) facing the windshield plate (30), and the windshield plate (30) is a radiator. When moving in the direction of increasing the polymerization amount with (24), the air duct (32) communicates with the air blowing section (38) of the fan (41), and the wind shield (30) is connected to the radiator (24). When it moves to the direction which reduces the superposition | polymerization amount, communication with the ventilation part (38) of a ventilation duct (32) and a fan (41) is interrupted | blocked, and ventilation from a fan (41) is sent to a ventilation duct (32). On the lower inclined surface (S) and the inner surface of the wind shield (30) Is inner is obtained by a driving unit structure of a working vehicle according to claim 1, characterized in that the structure to be sucked into the radiator (24) side.
According to the fifth aspect of the present invention, even if the windshield plate (30) is moved to its moving end in a direction to reduce the polymerization amount of the windshield plate (30) and the radiator (24), the windshield plate The working vehicle according to claim 1, 2, 3, or 4, wherein the polymerization state between the end of (30) and a part of the radiator (24) is maintained. It has a prime mover structure.
The invention according to claim 6 is provided with a first air intake duct (28) including the filter body (29) on an outer side surface and including a wind shielding plate (30) on an outer side portion of the driving part cover (15), A second air intake duct (43) is provided that communicates from the air inlet (42) provided on the front side of the driving section cover (15) to a portion of the first air intake duct (28) inside the wind shield (30). According to claim 2, claim 3, or claim 4, the working vehicle driving portion structure is provided.

請求項１記載の発明によると、通常作業時には、遮風板（３０）とラジエータ（２４）との重合量を減少させる方向へ該遮風板（３０）を移動させることで、冷却ファン（２２）によって吸入される外気の量を増大させて、ラジエータ（２４）およびエンジンの冷却効率を高めることができる。また、遮風板（３０）とラジエータ（２４）との重合量を増加させる方向へ該遮風板（３０）を移動させれば、この遮風板（３０）の外側に対向する濾過体（２９）の部位から吸入される外気の流速が低下し、この濾過体（２９）の外側面に塵埃が吸着されにくくなる。更に、この遮風板（３０）に形成した通風部（３１）からファン（４１）によって送られる風が濾過体（２９）の内側から外側へ吹き出すように作用し、濾過体（２９）の外側面に吸着されていた塵埃が吹き飛ばされる。これによって、濾過体（２９）が目詰まりしにくくなり、ラジエータ（２４）およびエンジンの冷却効率の低下を防止して作業車輌の作業能率を高めることができる。
請求項２記載の発明によると、上記請求項１記載の発明の効果を奏するうえで、遮風板（３０）がラジエータ（２４）との重合量を増加させる方向へ移動した場合に、該遮風板（３０）の通風部（３１）とファン（４１）の送風部とが連通する構成としたので、遮風板（３０）を移動させる構造を利用してファン（４１）からの送風が外側方へ吹き出す状態に切り替えることができ、構造の簡素化によって故障の発生が少なくなり、耐久性および品質信頼性を高めることができる。
請求項３記載の発明によると、上記請求項２記載の発明の効果を奏するうえに、遮風板（３０）がラジエータ（２４）との重合量を減少させる方向へ移動した場合には、ファン（４１）からの送風が遮風板（３０）の内側面で案内されてラジエータ（２４）側へ吸入されるので、冷却ファン（２２）による吸入風にファン（４１）による送風が加わり、ラジエータ（２４）へ送られる冷却風量が増大することで、通常作業時における冷却風量を適正に維持してエンジンのオーバーヒートを防止することができる。
請求項４記載の発明によると、上記請求項１記載の発明の効果を奏するうえに、遮風板（３０）がラジエータ（２４）との重合量を増加させる方向へ移動した場合に、送風ダクト（３２）とファン（４１）の送風部とが連通し、ファン（４１）からの送風が送風ダクト（３２）から濾過体（２９）へ向けて斜めに吹き出し、濾過体（２９）の外側面に吸着されていた塵埃が吹き飛ばされる。これによって、濾過体（２９）の目詰まりが少なくなり、ラジエータ（２４）およびエンジン（１４）の冷却効率の低下を防止して作業車輌の作業能率を高めることができる。また、遮風板（３０）がラジエータ（２４）との重合量を減少させる方向へ移動した場合には、ファン（４１）からの送風が送風ダクト（３２）下部の傾斜面（Ｓ）と遮風板（３０）の内側面で案内されてラジエータ（２４）側へ吸入されるので、冷却ファン（２２）による吸入風にファン（４１）による送風が加わり、ラジエータ（２４）へ送られる冷却風量が増大することで、通常作業時における冷却風量を適正に維持してエンジン（１４）のオーバーヒートを防止することができる。
請求項５記載の発明によると、請求項１または請求項２または請求項３または請求項４記載の発明の効果を奏するうえに、遮風板（３０）とラジエータ（２４）との重合量を減少させる方向へ遮風板（３０）をその移動端部まで移動させても、該遮風板（３０）の端部とラジエータ（２４）の一部との重合状態が維持されるので、ファン（４１）からの送風が遮風板（３０）の内側面で案内されてラジエータ（２４）側へ吸入され、冷却ファン（２２）による吸入風にファン（４１）による送風が加わり、ラジエータ（２４）へ送られる冷却風量が確保されることで、通常作業時における冷却風量を適正に維持してエンジン（１４）のオーバーヒートを防止することができる。
請求項６記載の発明によると、請求項２または請求項３または請求項４記載の発明の効果を奏するうえに、濾過体（２９）の外側面に吸着された塵埃を除去するべく遮風板（３０）とラジエータ（２４）との重合量を増加させる方向へ遮風板（３０）を移動させても、原動部カバー（１５）の前側に設けた吸気口（４２）から迂回して吸入される外気によってラジエータ（２４）側に吸入される冷却風量の低下を防止することができる。 According to the first aspect of the present invention, the cooling fan (22) is moved by moving the wind shield plate (30) in a direction to reduce the polymerization amount of the wind shield plate (30) and the radiator (24) during normal operation. ) To increase the amount of outside air sucked in, thereby improving the cooling efficiency of the radiator (24) and the engine. In addition, if the wind shield plate (30) is moved in a direction to increase the polymerization amount of the wind shield plate (30) and the radiator (24), a filter body facing the outside of the wind shield plate (30) ( 29) The flow rate of the outside air sucked from the portion 29) is reduced, and it is difficult for the dust to be adsorbed on the outer surface of the filter body (29). Further, the air sent by the fan (41) from the ventilation portion (31) formed on the air shield plate (30) acts so as to blow out from the inside of the filter body (29) to the outside of the filter body (29). The dust adsorbed on the side surface is blown away. As a result, the filter body (29) is less likely to be clogged, and a reduction in cooling efficiency of the radiator (24) and the engine can be prevented to increase the working efficiency of the work vehicle.
According to the invention described in claim 2, in order to achieve the effect of the invention described in claim 1, when the wind shielding plate (30) moves in a direction to increase the polymerization amount with the radiator (24), the shielding is performed. Since the ventilation part (31) of the wind plate (30) and the air blowing part of the fan (41) communicate with each other, the air from the fan (41) is blown using the structure for moving the wind shielding plate (30). It is possible to switch to a state of blowing outward, and the simplification of the structure reduces the occurrence of failure, thereby improving durability and quality reliability.
According to the third aspect of the present invention, in addition to the effects of the second aspect of the invention, when the wind shield (30) moves in a direction to reduce the amount of polymerization with the radiator (24), the fan Since the air from (41) is guided by the inner surface of the wind shield (30) and sucked into the radiator (24), the air from the fan (41) is added to the air sucked by the cooling fan (22), and the radiator By increasing the amount of cooling air sent to (24), it is possible to appropriately maintain the amount of cooling air during normal work and prevent overheating of the engine.
According to the invention of claim 4, in addition to the effect of the invention of claim 1, when the wind shield (30) moves in the direction of increasing the polymerization amount with the radiator (24), the air duct (32) communicates with the air blowing part of the fan (41), and the air blown from the fan (41) blows obliquely from the air duct (32) toward the filter body (29), and the outer surface of the filter body (29). Dust adsorbed on the surface is blown away. As a result, clogging of the filter body (29) is reduced, and a reduction in the cooling efficiency of the radiator (24) and the engine (14) can be prevented, and the working efficiency of the work vehicle can be increased. In addition, when the wind shield (30) moves in a direction to reduce the amount of polymerization with the radiator (24), the air from the fan (41) is blocked from the inclined surface (S) below the air duct (32). Since the air is guided to the radiator (24) by being guided by the inner surface of the wind plate (30), the air blown by the fan (41) is added to the air sucked by the cooling fan (22), and the amount of cooling air sent to the radiator (24) As a result of the increase, the amount of cooling air during normal operation can be maintained appropriately, and overheating of the engine (14) can be prevented.
According to the invention described in claim 5, in addition to the effects of the invention described in claim 1 or claim 2, or claim 3 or claim 4, the polymerization amount of the wind shielding plate (30) and the radiator (24) is Even if the windshield plate (30) is moved to its moving end in the decreasing direction, the overlapping state between the end portion of the windshield plate (30) and a part of the radiator (24) is maintained. The air blown from (41) is guided by the inner surface of the wind shielding plate (30) and sucked into the radiator (24), and the air blown by the fan (41) is added to the air sucked by the cooling fan (22). ) Is ensured, the amount of cooling air during normal work can be maintained appropriately, and overheating of the engine (14) can be prevented.
According to the invention described in claim 6, in addition to the effects of the invention described in claim 2, 3 or 4, the wind shielding plate is used to remove dust adsorbed on the outer surface of the filter body (29). Even if the windshield plate (30) is moved in the direction to increase the amount of polymerization between the (30) and the radiator (24), the intake is bypassed from the intake port (42) provided on the front side of the prime cover (15). It is possible to prevent a decrease in the amount of cooling air sucked into the radiator (24) by the outside air.

コンバインの右側面図である。It is a right view of a combine. 通常作業状態における原動部の説明用正面図である。It is a front view for description of the drive part in a normal working state. 通常作業状態における原動部の説明用側面図である。It is a side view for description of the drive part in a normal working state. 塵埃除去状態における原動部の説明用正面図である。It is a front view for description of a drive part in a dust removal state. 塵埃除去状態における原動部の説明用側面図である。It is a side view for explanation of a prime mover in a dust removal state. 原動部の説明用概略平面図である。It is a schematic plan view for description of a driving part. 原動部の説明用正面図である。It is a front view for description of a driving part. 原動部の説明用側面図である。It is a side view for description of a driving part. 原動部の要部の拡大正面図である。It is an enlarged front view of the principal part of a drive part. 原動部の要部の拡大側面図である。It is an enlarged side view of the principal part of a drive part. 参考例における要部の正面図である。It is a front view of the principal part in a reference example. 参考例における要部の側面図である。It is a side view of the principal part in a reference example.

この発明を実施するコンバインの構成について説明する。尚、以下の記述における「左側」および「右側」とは、コンバインの前進方向に沿う方向を基準とするものであり、操縦部に搭乗した操縦者の視線に沿う表現としている。 The structure of the combine which implements this invention is demonstrated. In the following description, “left side” and “right side” are based on the direction along the forward direction of the combine, and are expressed along the line of sight of the operator who has boarded the control unit.

図１に示すように、コンバインの機体は、走行装置１を備えた機台２の左側の部位に脱穀装置３を搭載し、機台２の右側の部位には穀粒貯留装置４を搭載し、この穀粒貯留装置４の前側に操縦部５を設け、この操縦部５と脱穀装置３の前側に刈取装置６を設けて構成する。 As shown in FIG. 1, the combine body has a threshing device 3 mounted on a left side portion of a machine base 2 provided with a traveling device 1, and a grain storage device 4 mounted on a right side portion of the machine base 2. The control unit 5 is provided on the front side of the grain storage device 4, and the reaping device 6 is provided on the front side of the control unit 5 and the threshing device 3.

前記走行装置１は、機台２の前部に取り付けたミッションケース７から駆動される左右の駆動輪８，８と、左右の転輪フレーム９に軸受された多数の転輪１０にわたってクローラ１１，１１を巻き掛けて構成する。 The traveling device 1 includes crawlers 11 extending over left and right drive wheels 8 and 8 driven from a transmission case 7 attached to the front of the machine base 2 and a large number of wheels 10 supported by left and right wheel frames 9. 11 is wound around.

前記機台２は、角パイプを平面視で矩形状に枠組みして構成する。 The machine base 2 is configured by a rectangular pipe framed in a rectangular shape in plan view.

前記脱穀装置３は、扱胴や処理胴を備えた上側の扱室と、揺動選別棚と唐箕と１番移送螺旋と２番移送螺旋を備えた下側の選別室とから構成する。前記扱室の左外側には、刈取装置６側の引継搬送装置の終端部から刈取穀稈を引き継いで搬送するフィードチェンを備える。尚、この脱穀装置の後部には、脱穀後の排藁を細かく切断して排出する排藁カッター（図示省略）を設ける。 The threshing device 3 includes an upper handling chamber provided with a handling cylinder and a processing cylinder, and a lower sorting chamber provided with a swing sorting shelf, a red pepper, a first transfer spiral, and a second transfer spiral. A feed chain is provided on the left outer side of the handling chamber to take over and carry the harvested cereal meal from the end of the take-up and transfer device on the mowing device 6 side. In addition, the rear part of this threshing apparatus is provided with a waste cutter (not shown) that cuts and discharges the waste after the threshing.

前記穀粒貯留装置４は、底部に排出螺旋を備えた容器である。前記脱穀装置３の１番移送螺旋によって回収された穀粒を、１番揚穀筒（図示省略）を介して該穀粒貯留装置４に投入して貯留する。また、この穀粒貯留装置４の後側には、縦軸中心に旋回自在の揚穀筒１２を設け、この揚穀筒１２の上端部に排出筒１３の基部を上下回動自在に接続する。尚、上記１番揚穀筒と揚穀筒１２と排出筒１３には、移送用の螺旋を夫々内装している。 The grain storage device 4 is a container having a discharge spiral at the bottom. The grain recovered by the No. 1 transfer helix of the threshing device 3 is input and stored in the grain storage device 4 via the No. 1 lifting cylinder (not shown). Further, on the rear side of the grain storage device 4, a swivelable milling cylinder 12 is provided around the vertical axis, and the base of the discharge cylinder 13 is connected to the upper end of the milling cylinder 12 so as to be rotatable up and down. . The No. 1 cereal cylinder, the cereal cylinder 12 and the discharge cylinder 13 are each provided with a transfer spiral.

前記操縦部５は、機台２の右側前部に搭載したエンジン１４を覆う原動部カバー１５の上部に、操縦者が着座する操縦席１６を取り付け、この操縦席１６の前方に前部操作台１７を設け、操縦席１６の左側には側部操作台１８を設けて構成する。前記操縦席１６と前部操作台１７の前後間隔部の右側から、操縦者が乗り降りする構成としている。尚、前記前部操作台１７の上部には、操舵レバー１９と、モニターを備えたメータパネルと、ハンドル２０を設ける。また、前記側部操作台１８の上部には、前側から後側へ向かって、副変速レバーと、主変速レバー２１と、刈取クラッチレバーと、脱穀クラッチレバーを設ける。（副変速レバーと刈取クラッチレバーと脱穀クラッチレバーは図示省略している。）前記操舵レバー１９は、左右方向へ倒すことで左右の駆動輪８，８の回転速度に差を生じさせて機体を旋回させるように連繋している。また、操舵レバー１９を前後方向へ倒すことで、油圧シリンダ（図示省略）を伸縮させて刈取装置６を昇降させるように連繋している。
しかして、図２、図３に示すように、エンジン１４を、その出力軸が左右左右方向を向く姿勢で、前記機台２の右側前部に防振マウント（図示省略）を介して搭載する。これによって、エンジン１４に備えた冷却ファン２２が機体外側（エンジン１４の右側）に配置され、エンジン１４の出力軸に備えたフライホール２３が機体内側（エンジン１４の左側）に配置される。
そして、前記冷却ファン２２の機体外側（右側）の部位には、エンジン１４冷却用のラジエータ２４を、その長辺部を機体前後方向に沿わせて縦姿勢で搭載する。該ラジエータ２４は、機台２および該機台２に固定したフレームによって支持され、その注水口を上部に備え、冷却水の出入り口を上部および下部に備えている。
前記原動部カバー１５は、エンジン１４およびラジエータ２４の前側を覆う前側壁体２５と、エンジン１４およびラジエータ２４の上側を覆う上側壁体２６と、エンジン１４およびラジエータ２４の後側を覆う後側壁体２７と、ラジエータ２４の外側方を覆うラジエータカバー（第１吸気ダクト）２８とを一体に備えて構成する。
前記上側壁体２６の上面には操縦席１６を取り付ける。
前記ラジエータカバー２８は、鉄板または合成樹脂によって風洞状に構成し、図３に示すように、その上部側ほど前後方向幅が狭くなるように上部を傾斜させて形成する。そして、該ラジエータカバー２８の外側面には、その上下方向中間部から上端部にかけて、目抜き板（多孔板）状の濾過体（防塵網）２９を設ける。該濾過体２９の上部も、ラジエータカバー２８の形状に沿って、その上部側ほど前後方向幅が狭くなるように上部を傾斜させて形成する。濾過体２９とラジエータ２４と冷却ファン２２とエンジン１４とを、機体側面視で重合するように配置する。該ラジエータカバー２８は、前記前側壁体２５、上側壁体２６、後側壁体２７とは独立して、機体外側方（右側方）へ傾倒するように開放可能に、機体前後方向の軸心Ｑ周りに回動自在に取り付ける。
前記ラジエータカバー２８の内部には、冷却ファン２２の吸引作用によって濾過体２９を通過してラジエータ２４側へ吸入される外気を遮蔽可能な遮風板３０を設ける。該遮風板３０は矩形状の無孔の鉄板であり、その上端部に矩形の孔を形成し、この孔を通風可能な通風部３１として備える。
また、この通風部３１には、内側上方へ向けて傾斜した断面矩形の筒状の送風ダクト３２を一体に形成する。該送風ダクト３２の内側端は蓋板３２ａによって閉塞し、該蓋板３２ａには、円形の孔である吹き込み口３２ｂを形成する。
そして、図９、図１０に示すように、該遮風板３０の前後両縁部には、上下方向のラック部３３，３３を設け、ラジエータカバー２８内に設けた電動モータ３４によって駆動される機体前後方向の駆動軸３５の前後２箇所にはギヤ３６，３６を取り付け、該ギヤ３６，３６を前記ラック３３，３３に夫々噛み合わせる。尚、図示省略しているが、遮風板３０を上下移動自在に案内するレールを、該遮風板３０の前後両側部に備えている。以上の構成により、電動モータ３４を正転させると、遮風板３０が上方へ移動して移動ストロークの上端部でリミットスイッチ（図示省略）の作動により停止し、電動モータ３４を逆転させると、遮風板３０が下方へ移動して移動ストロークの下端部でリミットスイッチ（図示省略）の作動により停止する。尚、前記電動モータ３４の正転と逆転は、エンジン１４の稼動中、コントローラによって一定時間ごとに交互に繰り返す構成としている。
また、前記ラジエータカバー２８の上部を上側壁体２６よりも上方へ突出させ、この突出部の内側壁３７に円形の孔である送風部３８を形成し、この送風部３８の周囲には、左右方向に所定の幅を有する円筒状のファンケーシング３９の右側端部を固定する。該ファンケーシング３９内には、電動モータ４０で駆動されるファン４１を設け、電動モータ４０の駆動によって該ファン４１が回転し、外気を送風部３８からラジエータカバー２８の内部へ吹き込む構成とする。尚、前記電動モータ４０は、エンジン１４の稼動中、常時同方向へ回転させる構成としている。
しかして、図２、図３に示すように、前記電動モータ３４を正転させ、遮風板３０が上方へ移動して移動ストロークの上端部でリミットスイッチの作動により停止した状態（冷却ファン２２による外気の吸入方向における遮風板３０とラジエータ２４との重合量を減少させる方向へ該遮風板３０を移動させた状態）では、遮蔽板３０の下端部がラジエータ２４の上端部のみを覆う位置まで上昇すると共に、前記送風ダクト３２の内側端部に形成した吹き込み口３２ｂがファン４１の送風部３８よりも高い位置まで上昇することで、該吹き込み口３２ｂと送風部３８とが連通しない状態となる。これによって、ファン４１による送風部３８からの送風が送風ダクト３２下部の傾斜面Ｓとこの下端に続く遮風板３０の内側面で案内されてラジエータ２４側へ吸入されるので、冷却ファン２２による吸入風にファン４１よる送風が加わり、ラジエータ２４へ送られる冷却風量が増大することで、通常作業時における冷却風量を適正に維持してエンジン１４のオーバーヒートを防止することができる。
一方、図４、図５に示すように、前記電動モータ３４を逆転させ、遮風板３０が下方へ移動して移動ストロークの下端部でリミットスイッチの作動により停止した状態（冷却ファン２２による外気の吸入方向における遮風板３０とラジエータ２４との重合量を増加させる方向へ該遮風板３０を移動させた状態）では、遮風板３０の下端部がラジエータ２４の上下方向中央部までを覆う位置まで下降する。これによって、この遮風板３０の外側に対向する濾過体２９の部位から吸入される外気の流速が低下し、この濾過体２９の外側面に塵埃が吸着されにくくなる。これと共に、送風ダクト３２の内側端部に形成した吹き込み口３２ｂがファン４１の送風部３８と一致することで、該吹き込み口３２ｂと送風部３８とが連通する。これによって、ファン４１からの送風が送風ダクト３２から濾過体２９へ向けて斜めに吹き出し、濾過体２９の外側面に吸着されていた塵埃が吹き飛ばされる。これによって、濾過体２９の目詰まりが少なくなり、ラジエータ２４およびエンジン１４の冷却効率の低下を防止して作業車輌の作業能率を高めることができる。尚、遮風板３０の下降途中において、送風ダクト３２の吹き込み口３２ｂとファン４１の送風部３８とが完全に一致せず、例えばその断面積の一部だけ連通する状態も生じる。このような状態では、ファン４１からの送風が、送風ダクト３２から濾過体２９へ向けて斜めに吹き出す風と、送風ダクト３２下部の傾斜面とこの下端に続く遮風板３０の内側面で案内されてラジエータ２４側へ吸入される風とに分かれ、夫々の送風量の比率が変化することとなる。即ち、遮風板３０が下降するほど、送風ダクト３２の吹き込み口３２ｂとファン４１の送風部３８とが連通する風路の断面積が大きくなり、送風ダクト３２から濾過体２９へ向けて斜めに吹き出す風量が増大する。
また、図４、図５、図６に示すように、原動部カバー１５の前側壁体２５には矩形の吸気口４２を設け、該吸気口４２から前記ラジエータカバー（第１吸気ダクト）２８における遮風板３０よりも内側の部位へ連通する第２吸気ダクト４３を設ける。これによって、濾過体２９の外側面に吸着された塵埃を除去するために遮風板３０を下降させても、吸気口４２から迂回して吸入される外気によって、ラジエータ２４側に吸入される冷却風量の低下を防止することができる。
また、図７、図８、図９、図１０に示すように、前記ファン４１部を閉塞する状態に囲うボックス４４を、ラジエータカバー２８の上部の内側壁３７に取り付けてもよい。これにより、遮風板３０が上方へ移動して移動ストロークの上端位置で停止した状態では、ファン４１の吸引力によって濾過体２９の上部から外気が吸入され、この外気が通風部３１および送風ダクト３２内を逆流してボックス４４内に流れ込み、このボックス４４内を迂回してファン１に吸い込まれ、ファン４１による送風部３８からの送風が送風ダクト３２下部の傾斜面とこの下端に続く遮風板３０の内側面で案内されてラジエータ２４側へ吸入される。これにより、冷却ファン２２による吸入風にファン４１よる送風が加わり、ラジエータ２４へ送られる冷却風量が増大することで、通常作業時における冷却風量を適正に維持してエンジン１４のオーバーヒートを防止することができる。
また、図３、図５、図８、図１０に示すように、いずれの実施例においても、ファン４１は操縦席１６の後側に配置する。これによって、操縦席１６とファン４１部とを機体正面視でオーバーラップさせて配置でき、コンパクトにレイアウトすることができる。
尚、前記ファン４１とその駆動用の電動モータ４０を送風ダクト３２側に一体に取り付け、遮風板３０と共に上下移動する構成としてもよい。
また、前記遮風板３０の移動方向は上下方向に限らず、前後方向、斜め上下方向とするもよい。
また、前記冷却ファン２２を電動モータで駆動する構成とするもよく、ファン４１をエンジン１４の駆動力で駆動する構成としてもよい。
次に、図１１、図１２に示す参考例について説明する。
エンジン１４の冷却ファン駆動軸に円筒状の回転筒４５を取り付け、該回転筒４５の周面に等間隔で６つの孔を穿ち、該６つの孔に、内周面に雌螺子を形成したボス４６を夫々嵌め込んで取り付ける。この６つのボス４６に対して、外側端部に翼板４８を備えた雄螺子軸４７をボス４６の外側から挿し込むように螺合させて取り付け、該雄螺子軸４７の内側端部にウエイト４９を取り付け、該ウエイト４９とボス４６との間の雄螺子軸４７上の部位にバランススプリング５０を装着する。
この構成により、エンジン１４が高速回転している状態では、ウエイト４９に掛かる遠心力でバランススプリング５０の弾発力に抗して該ウエイト４９と雄螺子軸４７が放射方向に押され、該雄螺子軸４７とボス４６の雌螺子との螺合関係によって雄螺子軸４７が自転する。これによって、雄螺子軸４７と一体の翼板４８の角度が変化し、この６つの翼板４８によって機体外側から内側へ外気が吸入され、ラジエータ２４およびエンジン１４側へ冷却風が送られる状態となる。一方、エンジン１４の回転速度が低下すると、ウエイト４９に掛かる遠心力が減少し、バランススプリング５０の弾発力によって雄螺子軸４７が引き戻され、該雄螺子軸４７とボス４６の雌螺子との螺合関係によって雄螺子軸４７が上記と逆の方向へ自転する。これによって、雄螺子軸４７と一体の翼板４８の角度が逆向きに変化し、エンジン１４の冷却ファン駆動軸が同一方向に回転しているにもかかわらず、６つの翼板４８によって機体内側から外側方へ風が吹き出し、濾過体の外側面に吸着されていた塵埃を吹き飛ばすことができる。
尚、上述のエンジン１４の高速回転状態とは、コンバインによる刈取脱穀作業に適した毎分約２６００回転の定格回転状態を指し、上述のエンジン１４の低速回転状態とは、エンジン１４をアイドリング状態とした毎分約１５００回転を指す。これにより、刈取脱穀作業中は、６つの翼板４８によって機体外側から内側へ外気を吸入してラジエータ２４およびエンジン１４を冷却し、刈取脱穀作業を行わない待機時に、６つの翼板４８によって機体内側から外側方へ風を吹き出して濾過体の外側面に吸着されていた塵埃を吹き飛ばすことができる。
また、脱穀クラッチや穀粒排出クラッチを接続操作した場合に、エンジン１４の回転速度をアイドリング回転速度から定格回転速度まで自動的に上昇させる制御装置を備えたコンバインでは、この脱穀クラッチや穀粒排出クラッチを遮断操作することでエンジン１４の回転速度がアイドリング回転速度まで自動的に低下する途中で、翼板４８の角度が逆向きに変化した回転速度を数秒間だけ保持し、その後、アイドリング回転速度まで低下させるように制御してもよい。これによって、機体内側から外側方へ吹き出す風の風量を大きくでき、濾過体の外側面に吸着されていた塵埃の除去効果が高まる。 The control unit 5 is provided with a control seat 16 on which a driver sits on an upper part of a driving unit cover 15 that covers an engine 14 mounted on the right front portion of the machine base 2, and a front operation table in front of the control seat 16. 17 and a side operation table 18 is provided on the left side of the cockpit 16. The driver gets on and off from the right side of the front-rear spacing portion of the cockpit 16 and the front operation console 17. A steering lever 19, a meter panel provided with a monitor, and a handle 20 are provided on the upper portion of the front operation console 17. Further, an auxiliary transmission lever, a main transmission lever 21, a cutting clutch lever, and a threshing clutch lever are provided on the upper side of the side operation console 18 from the front side to the rear side. (The sub-transmission lever, the mowing clutch lever, and the threshing clutch lever are not shown.) The steering lever 19 is tilted in the left-right direction to cause a difference in the rotational speed of the left and right drive wheels 8, 8, thereby It is connected to make it turn. Further, by tilting the steering lever 19 in the front-rear direction, the hydraulic cylinder (not shown) is expanded and contracted so as to move the reaping device 6 up and down.
As shown in FIGS. 2 and 3, the engine 14 is mounted on the right front portion of the machine base 2 via a vibration-proof mount (not shown) with the output shaft facing left, right, left and right. . As a result, the cooling fan 22 provided in the engine 14 is disposed on the outside of the body (right side of the engine 14), and the fly hole 23 provided on the output shaft of the engine 14 is disposed on the inside of the body (left side of the engine 14).
A radiator 24 for cooling the engine 14 is mounted in a vertical position on the outer side (right side) of the cooling fan 22 with its long side portion along the longitudinal direction of the body. The radiator 24 is supported by the machine base 2 and a frame fixed to the machine base 2, and has a water inlet at the upper part and a cooling water inlet / outlet at the upper part and the lower part.
The driving part cover 15 includes a front side wall body 25 that covers the front side of the engine 14 and the radiator 24, an upper side wall body 26 that covers the upper side of the engine 14 and the radiator 24, and a rear side wall body that covers the rear side of the engine 14 and the radiator 24. 27 and a radiator cover (first intake duct) 28 that covers the outside of the radiator 24 are integrally provided.
A cockpit 16 is attached to the upper surface of the upper wall body 26.
The radiator cover 28 is formed in a wind tunnel shape using an iron plate or a synthetic resin, and as shown in FIG. 3, the upper portion thereof is inclined so that the width in the front-rear direction becomes narrower. On the outer surface of the radiator cover 28, a filter plate (dustproof net) 29 in the form of a cut-out plate (perforated plate) is provided from the vertical middle portion to the upper end portion. The upper portion of the filter body 29 is also formed along the shape of the radiator cover 28 with the upper portion inclined so that the width in the front-rear direction becomes narrower toward the upper portion side. The filter body 29, the radiator 24, the cooling fan 22, and the engine 14 are arranged so as to be superposed in a side view of the airframe. The radiator cover 28 is independent of the front side wall body 25, the upper side wall body 26, and the rear side wall body 27 and can be opened so as to tilt toward the outer side (right side) of the machine body. Attach it around it.
Inside the radiator cover 28, there is provided a wind shield plate 30 that can block the outside air that passes through the filter body 29 and is sucked into the radiator 24 by the suction action of the cooling fan 22. The air shield plate 30 is a rectangular non-porous iron plate, and a rectangular hole is formed at an upper end portion thereof, and the air shield plate 30 is provided as a ventilation portion 31 that can ventilate the hole.
In addition, the ventilation portion 31 is integrally formed with a cylindrical air duct 32 having a rectangular cross section that is inclined inward and upward. The inner end of the air duct 32 is closed by a cover plate 32a, and a blow port 32b which is a circular hole is formed in the cover plate 32a.
As shown in FIGS. 9 and 10, the front and rear edges of the wind shield plate 30 are provided with vertical rack portions 33, 33, which are driven by an electric motor 34 provided in the radiator cover 28. Gears 36 and 36 are attached to two front and rear positions of the drive shaft 35 in the longitudinal direction of the machine body, and the gears 36 and 36 are engaged with the racks 33 and 33, respectively. Although not shown, rails that guide the wind shield 30 so as to be movable up and down are provided on both front and rear sides of the wind shield 30. With the above configuration, when the electric motor 34 is rotated forward, the wind shielding plate 30 is moved upward, stopped by the operation of a limit switch (not shown) at the upper end of the moving stroke, and when the electric motor 34 is reversed, The wind shielding plate 30 moves downward and stops at the lower end of the moving stroke by the operation of a limit switch (not shown). The forward rotation and the reverse rotation of the electric motor 34 are alternately repeated at regular intervals by the controller while the engine 14 is operating.
Further, the upper portion of the radiator cover 28 is protruded upward from the upper wall body 26, and a blower portion 38 that is a circular hole is formed on the inner wall 37 of the projecting portion. A right end portion of a cylindrical fan casing 39 having a predetermined width in the direction is fixed. A fan 41 driven by an electric motor 40 is provided in the fan casing 39, and the fan 41 is rotated by driving the electric motor 40, so that outside air is blown into the radiator cover 28 from the blower portion 38. The electric motor 40 is always rotated in the same direction during operation of the engine 14.
As shown in FIGS. 2 and 3, the electric motor 34 is rotated forward, the wind shield 30 is moved upward, and is stopped by the operation of the limit switch at the upper end of the moving stroke (cooling fan 22). In the state in which the wind shield plate 30 is moved in a direction that reduces the amount of polymerization between the wind shield plate 30 and the radiator 24 in the direction of outside air intake by the air), the lower end portion of the shield plate 30 covers only the upper end portion of the radiator 24. As the air inlet 32b formed at the inner end of the air blowing duct 32 rises to a position higher than the air blowing portion 38 of the fan 41, the air blowing port 32b and the air blowing portion 38 do not communicate with each other. It becomes. As a result, the air blown from the blower section 38 by the fan 41 is guided by the inclined surface S below the blower duct 32 and the inner side surface of the wind shielding plate 30 following this lower end, and is sucked into the radiator 24 side. By adding air blown by the fan 41 to the intake air and increasing the amount of cooling air sent to the radiator 24, the amount of cooling air during normal operation can be properly maintained and overheating of the engine 14 can be prevented.
On the other hand, as shown in FIGS. 4 and 5, the electric motor 34 is rotated in the reverse direction, and the wind shield 30 is moved downward and stopped by the operation of the limit switch at the lower end of the moving stroke (the outside air by the cooling fan 22). In the state in which the wind shield plate 30 is moved in the direction in which the amount of polymerization between the wind shield plate 30 and the radiator 24 in the suction direction increases, the lower end of the wind shield plate 30 extends to the center in the vertical direction of the radiator 24. Move down to the covering position. As a result, the flow rate of the outside air sucked from the portion of the filter body 29 facing the outside of the wind shield plate 30 is reduced, and it is difficult for dust to be adsorbed to the outer surface of the filter body 29. At the same time, the blowing port 32b formed at the inner end of the blower duct 32 matches the blower unit 38 of the fan 41, so that the blower port 32b and the blower unit 38 communicate with each other. As a result, the air from the fan 41 is blown obliquely from the air duct 32 toward the filter body 29, and the dust adsorbed on the outer surface of the filter body 29 is blown off. As a result, clogging of the filter body 29 is reduced, and a reduction in the cooling efficiency of the radiator 24 and the engine 14 can be prevented and the work efficiency of the work vehicle can be increased. In addition, in the middle of the descent of the wind shielding plate 30, the blowing port 32b of the blower duct 32 and the blower portion 38 of the fan 41 do not completely coincide with each other, and for example, a state in which only a part of the cross-sectional area communicates may occur. In such a state, the air blown from the fan 41 is guided by the air blown obliquely from the air duct 32 toward the filter body 29, the inclined surface at the lower portion of the air duct 32, and the inner surface of the wind shield plate 30 following this lower end. Then, it is divided into the wind sucked into the radiator 24 side, and the ratio of the respective blown air amounts changes. In other words, the lower the wind shield plate 30 is, the larger the cross-sectional area of the air passage connecting the air inlet 32b of the air duct 32 and the air blowing portion 38 of the fan 41 becomes, so that the air passage is inclined from the air duct 32 toward the filter body 29. The amount of air blown out increases.
4, 5, and 6, a rectangular intake port 42 is provided in the front side wall body 25 of the prime mover cover 15, and the radiator cover (first intake duct) 28 extends from the intake port 42. A second intake duct 43 that communicates with a portion inside the wind shield 30 is provided. As a result, even if the wind shielding plate 30 is lowered to remove the dust adsorbed on the outer surface of the filter body 29, the cooling air sucked into the radiator 24 by the outside air that is bypassed and sucked from the air inlet 42. It is possible to prevent a decrease in air volume.
Further, as shown in FIGS. 7, 8, 9, and 10, a box 44 that surrounds the fan 41 may be attached to the inner wall 37 at the top of the radiator cover 28. Thereby, in a state where the wind shield plate 30 moves upward and stops at the upper end position of the moving stroke, the outside air is sucked from the upper part of the filter body 29 by the suction force of the fan 41, and this outside air is sucked into the ventilation section 31 and the air duct. 32 flows backward into the box 44, bypasses the box 44 and is sucked into the fan 1, and the air blown from the blower 38 by the fan 41 continues to the lower surface of the blower duct 32 and the lower end thereof. It is guided by the inner surface of the plate 30 and sucked into the radiator 24 side. As a result, air blown by the fan 41 is added to the air sucked by the cooling fan 22 and the amount of cooling air sent to the radiator 24 is increased, so that the amount of cooling air during normal operation is properly maintained and overheating of the engine 14 is prevented. Can do.
Further, as shown in FIGS. 3, 5, 8, and 10, the fan 41 is disposed on the rear side of the cockpit 16 in any of the embodiments. As a result, the cockpit 16 and the fan 41 can be arranged so as to overlap with each other when viewed from the front of the body, and the layout can be made compact.
The fan 41 and the electric motor 40 for driving the fan 41 may be integrally attached to the air duct 32 and moved up and down together with the wind shielding plate 30.
Further, the moving direction of the wind shield plate 30 is not limited to the vertical direction, and may be the front-rear direction and the oblique vertical direction.
The cooling fan 22 may be driven by an electric motor, and the fan 41 may be driven by the driving force of the engine 14.
Next, reference examples shown in FIGS. 11 and 12 will be described.
A boss in which a cylindrical rotary cylinder 45 is attached to a cooling fan drive shaft of the engine 14, six holes are formed at equal intervals on the peripheral surface of the rotary cylinder 45, and female screws are formed on the inner peripheral surface in the six holes. 46 is fitted and attached. A male screw shaft 47 having a blade 48 on the outer end is screwed onto the six bosses 46 so as to be inserted from the outside of the boss 46, and a weight is attached to the inner end of the male screw shaft 47. 49 is attached, and a balance spring 50 is attached to a portion on the male screw shaft 47 between the weight 49 and the boss 46.
With this configuration, when the engine 14 is rotating at a high speed, the weight 49 and the male screw shaft 47 are pushed in the radial direction against the elastic force of the balance spring 50 by the centrifugal force applied to the weight 49, and the male The male screw shaft 47 rotates due to the screwing relationship between the screw shaft 47 and the female screw of the boss 46. As a result, the angle of the blade 48 integrated with the male screw shaft 47 is changed, and outside air is sucked in from the outside to the inside of the fuselage by the six blades 48, and cooling air is sent to the radiator 24 and the engine 14 side. Become. On the other hand, when the rotational speed of the engine 14 decreases, the centrifugal force applied to the weight 49 decreases, the male screw shaft 47 is pulled back by the elastic force of the balance spring 50, and the male screw shaft 47 and the female screw of the boss 46 are connected. Due to the screwing relationship, the male screw shaft 47 rotates in the opposite direction. As a result, the angle of the blade 48 integrated with the male screw shaft 47 changes in the opposite direction, and the six blades 48 are used for the inner side of the fuselage even though the cooling fan drive shaft of the engine 14 rotates in the same direction. The wind blows outward from the air, and the dust adsorbed on the outer surface of the filter body can be blown off.
The above-mentioned high-speed rotation state of the engine 14 refers to a rated rotation state of about 2600 rotations per minute suitable for harvesting and threshing work by a combine. The above-mentioned low-speed rotation state of the engine 14 refers to the engine 14 in an idling state. Refers to about 1500 revolutions per minute. Thus, during the mowing and threshing operation, the six blades 48 suck the outside air from the outside of the machine body to the inside to cool the radiator 24 and the engine 14, and during the standby time when the mowing and threshing work is not performed, the six blades 48 use the machine body. It is possible to blow off the dust adsorbed on the outer surface of the filter body by blowing air from the inside to the outside.
In a combine equipped with a control device that automatically increases the rotational speed of the engine 14 from the idling rotational speed to the rated rotational speed when the threshing clutch or the grain discharging clutch is connected, the threshing clutch or the grain discharging While the rotational speed of the engine 14 is automatically reduced to the idling rotational speed by operating the clutch to be disengaged, the rotational speed at which the angle of the blade plate 48 is changed in the opposite direction is maintained for a few seconds, and then the idling rotational speed. It may be controlled so as to be lowered. As a result, the amount of air blown from the inside of the machine body to the outside can be increased, and the effect of removing dust adsorbed on the outside surface of the filter body is enhanced.

１４エンジン
１５原動部カバー
２２冷却ファン
２４ラジエータ
２８ラジエータカバー（第１吸気ダクト）
２９濾過体
３０遮風板
３１通風部
３２送風ダクト
３８送風部
４１ファン
４２吸気口
４３第２吸気ダクト
Ｓ傾斜面 14 Engine 15 Driving part cover 22 Cooling fan 24 Radiator 28 Radiator cover (first intake duct)
29 Filter body 30 Air shield plate 31 Ventilation part 32 Blower duct 38 Blower part 41 Fan 42 Intake port 43 Second intake duct S Inclined surface

Claims

A work including a cooling fan (22) inside the radiator (24) and a filter body (29) for filtering outside air sucked by the suction action of the cooling fan (22) outside the radiator (24). This is a driving part structure of a vehicle, and passes through the filter body (29) by the suction action of the cooling fan (22) between the radiator (24) and the filter body (29) and sucks into the radiator (24) side. A wind shielding plate (30) capable of shielding the outside air is provided, and a ventilation portion (31) capable of ventilating is formed in a part of the wind shielding plate (30), and is shielded through the ventilation portion (31). A fan (41) for blowing air to the outside of the wind plate (30) is provided, and the amount of polymerization of the wind shield plate (30) and the radiator (24) in the outside air suction direction by the cooling fan (22) is changed. The wind shield (30) is configured to be movable. Engine section structure of a working vehicle, characterized.

The fan (41) is provided at a fixed position outside the driving part cover (15) that covers the engine (14) and the radiator (24), and the wind shield (30) increases the amount of polymerization with the radiator (24). The working vehicle according to claim 1, characterized in that, when moved in the direction, the ventilation section (31) of the wind shielding plate (30) communicates with the blowing section (38) of the fan (41). The structure of the motor.

When the wind shield (30) moves in a direction to reduce the amount of polymerization with the radiator (24), the air blown from the fan (41) is guided on the inner surface of the wind shield (30) and the radiator (24 3. A driving part structure for a working vehicle according to claim 2, wherein the driving part is sucked into the) side.

The fan (41) is provided at a fixed position outside the driving part cover (15) that covers the engine (14) and the radiator (24), and the air from the fan (41) is blown to the ventilation part (31). An air duct (32) that is inclined so as to be obliquely guided toward the inner surface of the filter body (29) facing (30) is provided, and the amount of polymerization of the windshield plate (30) with the radiator (24) is increased. When moving in the increasing direction, the air duct (32) and the air blowing part (38) of the fan (41) communicate with each other, and the air shielding plate (30) reduces the amount of polymerization with the radiator (24). When moved, the communication between the air duct (32) and the air blowing part (38) of the fan (41) is cut off, and the air from the fan (41) is sent to the inclined surface (S) below the air duct (32). Radiator (Guided on the inner surface of the wind shield (30)) Engine section structure of a working vehicle according to claim 1, characterized in that the structure to be sucked into 4) side.

Even if the windshield plate (30) is moved to its moving end in a direction to reduce the amount of polymerization between the windshield plate (30) and the radiator (24), the end portion of the windshield plate (30) and the radiator The structure of the driving portion of the working vehicle according to claim 1, wherein the polymerization state with a part of (24) is maintained.

A first intake duct (28) including the filter body (29) on the outer surface and incorporating a wind shield (30) is provided on the outer side of the driving part cover (15), and the driving part cover (15) The second intake duct (43) communicating from the intake port (42) provided on the front side to a portion inside the wind shield (30) in the first intake duct (28) is provided. The working part structure of the working vehicle according to claim 2 or claim 3 or claim 4.