JP5472648B2 - Work vehicle - Google Patents

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JP5472648B2
JP5472648B2 JP2011120265A JP2011120265A JP5472648B2 JP 5472648 B2 JP5472648 B2 JP 5472648B2 JP 2011120265 A JP2011120265 A JP 2011120265A JP 2011120265 A JP2011120265 A JP 2011120265A JP 5472648 B2 JP5472648 B2 JP 5472648B2
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fan
continuously variable
variable transmission
rotation
traveling
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JP2012245914A (en
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靖 藤田
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Iseki and Co Ltd
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Iseki and Co Ltd
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  • Combines (AREA)
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Description

本発明は、作業車輌、特に、コンバインに係るものである。   The present invention relates to a work vehicle, particularly, a combine.

従来、エンジンの外側にエンジンの冷却用のファンと防塵ネットを有するラジエーターカバーを設け、この冷却用ファンの回転を、二個のテンションプーリとファンベルトとの当接位置を変更することにより正回転と逆回転とに切り替える構成は、公知である（特許文献１）。
また、従来、エンジン冷却用のファンをファン無段変速装置の出力軸に設け、ファン無段変速装置により正回転と逆回転とに切り替える構成は、公知である（特許文献２）。 Conventionally, a radiator cover with an engine cooling fan and a dust-proof net has been installed outside the engine, and the cooling fan rotates forward by changing the contact position between the two tension pulleys and the fan belt. The configuration for switching to reverse rotation is known (Patent Document 1).
Conventionally, a configuration in which an engine cooling fan is provided on the output shaft of a fan continuously variable transmission and switched between forward rotation and reverse rotation by the fan continuously variable transmission is known (Patent Document 2).

特開平１１−３６７５４号公報JP 11-36754 A 特開２００８−８７７２３号公報JP 2008-87723 A

前記公知例のうち前者の構成では、冷却用ファンの回転を、二個のテンションプーリとファンベルトとの当接位置を変更することにより正回転と逆回転とに切り替える構成のため、ベルトの摩耗等の課題がある。
また、エンジンの出力回転速度に対する冷却用ファンの回転速度を変更することができず、エンジンに負荷が掛かり、エンジンの出力回転が低下した場合、冷却用ファンの回転速度もこれに伴って低下し、冷却用ファンによる冷却効率が悪化する問題がある。
前記公知例のうち後者の構成では、冷却用ファンをファン無段変速装置の出力軸に設け、ファン無段変速装置により正回転と逆回転とに切り替えるので、前記課題は解決しているが、冷却用ファンとエンジンの間の冷却用ファンの送風範囲内にファン無段変速装置が設けられることになり、ファン無段変速装置が冷却用ファンの送風の抵抗となって、冷却効率が低いという課題がある。
本願は、冷却用ファンの回転機構を工夫し、簡単にラジエーターカバーの防塵ネットの付着物を除去すると共に、冷却効率を向上するようにしたものである。 In the former configuration of the known examples, the rotation of the cooling fan is switched between forward rotation and reverse rotation by changing the contact position between the two tension pulleys and the fan belt. There are issues such as.
In addition, if the rotation speed of the cooling fan relative to the engine output rotation speed cannot be changed and a load is applied to the engine and the output rotation of the engine decreases, the rotation speed of the cooling fan also decreases accordingly. There is a problem that the cooling efficiency by the cooling fan deteriorates.
Among the known examples, in the latter configuration, the cooling fan is provided on the output shaft of the fan continuously variable transmission, and the fan continuously variable transmission is switched between forward rotation and reverse rotation. The fan continuously variable transmission will be provided within the cooling fan blowing range between the cooling fan and the engine, and the fan continuously variable transmission becomes the resistance of the cooling fan blowing and the cooling efficiency is low. There are challenges.
In the present application, the rotation mechanism of the cooling fan is devised to easily remove deposits on the dust-proof net of the radiator cover and improve the cooling efficiency.

請求項１記載の発明は、エンジン１０の駆動回転を無段階に変速して走行装置２を駆動する走行用無段変速装置１１を備え、前記エンジン１０の外側には、冷却用ファン２０と、ラジエータ２１と、防塵ネット３７とを設け、前記冷却用ファン２０はファン用無段変速装置３０により正転および逆転駆動される構成とし、前記ファン用無段変速装置３０には、前記走行用無段変速装置１１の走行用ポンプ入力軸１４を介してエンジン１０の駆動回転を入力する構成とし、ファン用無段変速装置３０のファン用油圧モータ３２の出力プーリー４４とファン回転軸４０の入力プーリー４３との間にベルト４５を掛け回し、ファン用油圧モータ３２の出力軸４７の軸心方向視で、ファン用無段変速装置３０におけるファン回転軸４０とは反対側の面にファン用油圧ポンプ３１を変速するトラニオン軸７１を設けたことを特徴とする作業車輌としたものであり、通常ではエンジン１０の駆動回転を走行用無段変速装置１１の走行用ポンプ入力軸１４を介してファン用無段変速装置３０に伝達し、ファン用無段変速装置３０によって変速して冷却用ファン２０を正回転駆動して機体外部から機体内部方向へ送風させて、エンジン１０を冷却する。一方、ファン用無段変速装置３０を逆回転出力させて冷却用ファン２０を逆回転させると、機体内部から機体外部方向へ送風し、ラジエーターカバー２２の防塵ネット２４の付着物を除去する。
また、トラニオン軸７１を回転させてファン用無段変速装置３０を変速させ、ファン用無段変速装置３０のファン用油圧モータ３２の変速させた回転を出力プーリー４４からファン回転軸４０の入力プーリー４３にベルト４５を介して伝達し、冷却用ファン２０を正逆回転させる。
請求項２記載の発明は、前記走行用無段変速装置１１のケース３３から機体内側に突出する走行用ポンプ入力軸１４の内側端にエンジン１０の駆動回転を入力する入力プーリー１５を設け、前記走行用ポンプ入力軸１４の外側端を前記ケース３３から機体外側に延長させ、走行用ポンプ入力軸１４の外側端から前記ファン用無段変速装置３０のファン用油圧ポンプ３１に向けて駆動回転を出力する構成とし、前記走行用ポンプ入力軸１４の外側端には前記ファン用油圧ポンプ３１に向けて駆動回転を出力する中間出力プーリー３５またはファン用無段変速装置３０のファン用油圧ポンプ３１の入力軸４６に接続するカップリング機構６１を設けたことを特徴とする作業車輌としたものであり、ケース３３から内側に突出する走行用無段変速装置１１の走行用ポンプ入力軸１４の内側端にエンジン１０からの駆動回転を入力し、ケース３３の外側に突出する走行用ポンプ入力軸１４の外側端の出力回転をファン用無段変速装置３０のファン用油圧ポンプ３１に、中間出力プーリー３５またはカップリング機構６１によって伝達し、ファン用無段変速装置３０によって冷却用ファン２０を正回転駆動させると、エンジン１０を冷却し、ファン用無段変速装置３０を逆回転出力させると、冷却用ファン２０を逆回転させてラジエーターカバー２２の防塵ネット２４の付着物を除去する。
請求項３記載の発明は、前記冷却用ファン２０のファン回転軸４０は、前記エンジン１０の外側部に設けた冷却水を循環させるウォーターポンプ４１のポンプ入力軸４２に回転自在に軸受し、冷却用ファン２０が防塵ネット３７の外側から内側へ送風する正転状態において、ファン回転軸４０の回転方向とポンプ入力軸４２の回転方向とが一致する構成としたことを特徴とする作業車輌としたものであり、ファン用無段変速装置３０のファン用油圧ポンプ３１の駆動回転をファン回転軸４０に伝達して冷却用ファン２０を正逆回転させる。
ファン回転軸４０はウォーターポンプ４１のポンプ入力軸４２に支持されて回転し、冷却用ファン２０の正転時のとき、ファン回転軸４０の回転方向とポンプ入力軸４２の回転方向とが一致する。
請求項４記載の発明は、前記エンジン１０の上側に操縦部６を設け、前記ファン用無段変速装置３０は、操縦部６のステップ６３の下方空間内に配置したことを特徴とする作業車輌としたものであり、エンジン１０の駆動回転が走行用無段変速装置１１の走行用ポンプ入力軸１４に入力され、走行用無段変速装置１１の走行用ポンプ入力軸１４に入力された回転が走行用無段変速装置１１の側方となる操縦部６のステップ６３の下方空間内に配置したファン用無段変速装置３０のファン用油圧ポンプ３１に入力され、ファン用無段変速装置３０によって冷却用ファン２０を正回転させてエンジン１０を冷却し、または、冷却用ファン２０を逆回転させてラジエーターカバー２２の防塵ネット２４の付着物を除去する。 The invention according to claim 1 includes a continuously variable transmission 11 for traveling that drives the traveling device 2 by continuously changing the driving rotation of the engine 10, and a cooling fan 20 is provided outside the engine 10. A radiator 21 and a dust-proof net 37 are provided, and the cooling fan 20 is driven forward and reversely by a fan continuously variable transmission 30. The fan continuously variable transmission 30 includes The drive rotation of the engine 10 is input via the travel pump input shaft 14 of the step transmission 11, and the output pulley 44 of the fan hydraulic motor 32 of the fan continuously variable transmission 30 and the input pulley of the fan rotation shaft 40. 43, the belt 45 is wound around the fan 43, and the surface of the fan continuously variable transmission 30 opposite to the fan rotating shaft 40 as viewed in the axial direction of the output shaft 47 of the fan hydraulic motor 32. Is obtained by the working vehicle, characterized in that a trunnion shaft 71 to shift the hydraulic pump 31 for fan, the travel pump input shaft 14 of the traction continuously variable transmission 11 to drive rotation of the normal engine 10 Is transmitted to the fan continuously variable transmission 30 through which the speed is changed by the fan continuously variable transmission 30 and the cooling fan 20 is driven to rotate in the forward direction to blow air from the outside of the body toward the inside of the body to cool the engine 10. . On the other hand, when the fan continuously variable transmission 30 is reversely rotated and the cooling fan 20 is reversely rotated, air is blown from the inside of the machine body to the outside of the machine body, and the deposits on the dust-proof net 24 of the radiator cover 22 are removed.
Further, the trunnion shaft 71 is rotated to change the speed of the fan continuously variable transmission 30, and the rotational speed of the fan hydraulic motor 32 of the fan continuously variable transmission 30 is changed from the output pulley 44 to the input pulley of the fan rotating shaft 40. Then, the cooling fan 20 is rotated forward and backward.
The invention according to claim 2 is provided with an input pulley 15 for inputting the driving rotation of the engine 10 at the inner end of the traveling pump input shaft 14 protruding from the case 33 of the traveling continuously variable transmission 11 to the inside of the machine body, The outer end of the traveling pump input shaft 14 is extended from the case 33 to the outside of the machine body, and the drive rotation is performed from the outer end of the traveling pump input shaft 14 toward the fan hydraulic pump 31 of the fan continuously variable transmission 30. The traveling pump input shaft 14 is configured to output an intermediate output pulley 35 that outputs driving rotation toward the fan hydraulic pump 31 or a fan hydraulic pump 31 of the fan continuously variable transmission 30. A working vehicle characterized in that a coupling mechanism 61 connected to the input shaft 46 is provided, and a continuously variable transmission for traveling that protrudes inward from the case 33. The driving rotation from the engine 10 is input to the inner end of the traveling pump input shaft 14 and the output rotation of the outer end of the traveling pump input shaft 14 that protrudes outside the case 33 is input to the continuously variable transmission 30 for the fan. When it is transmitted to the fan hydraulic pump 31 by the intermediate output pulley 35 or the coupling mechanism 61 and the cooling fan 20 is driven to rotate forward by the fan continuously variable transmission 30, the engine 10 is cooled and the fan continuously variable transmission is performed. When the device 30 is reversely rotated, the cooling fan 20 is reversely rotated to remove the deposits on the dust-proof net 24 of the radiator cover 22.
According to a third aspect of the present invention, the fan rotation shaft 40 of the cooling fan 20 is rotatably supported by a pump input shaft 42 of a water pump 41 that circulates cooling water provided on the outer side of the engine 10 to cool the cooling fan 20. In the forward rotation state in which the fan 20 blows air from the outside to the inside of the dust-proof net 37, the working vehicle is characterized in that the rotation direction of the fan rotation shaft 40 and the rotation direction of the pump input shaft 42 coincide with each other. Therefore, the driving rotation of the fan hydraulic pump 31 of the fan continuously variable transmission 30 is transmitted to the fan rotating shaft 40 to rotate the cooling fan 20 forward and backward.
The fan rotation shaft 40 is supported by the pump input shaft 42 of the water pump 41 and rotates. When the cooling fan 20 is rotating forward, the rotation direction of the fan rotation shaft 40 matches the rotation direction of the pump input shaft 42. .
According to a fourth aspect of the present invention, the control unit 6 is provided above the engine 10, and the continuously variable transmission 30 for the fan is disposed in a space below the step 63 of the control unit 6. The driving rotation of the engine 10 is input to the traveling pump input shaft 14 of the traveling continuously variable transmission 11, and the rotation input to the traveling pump input shaft 14 of the traveling continuously variable transmission 11 is It is input to the fan hydraulic pump 31 of the fan continuously variable transmission 30 disposed in the space below the step 63 of the control unit 6 on the side of the traveling continuously variable transmission 11. The cooling fan 20 is rotated forward to cool the engine 10, or the cooling fan 20 is rotated backward to remove deposits on the dust-proof net 24 of the radiator cover 22.

請求項１記載の発明では、ファン用無段変速装置３０により冷却用ファン２０の回転方向を正回転状態と逆回転状態とに切替えることで、ラジエーター２１およびエンジン１０の冷却を行うと共に、ラジエーターカバー２２の防塵ネット２４の付着物を除去することができ、ファン用無段変速装置３０には走行用無段変速装置１１を介してエンジン１０の駆動回転を伝達するので、エンジン１０周辺のベルト伝動構成を簡素にでき、メンテナンス作業を容易にできる。
また、ベルト４５と反対側にトラニオン軸７１を設けているので、調節や設定作業およびメンテナンス作業を容易にすることができる。
請求項２記載の発明では、ケース３３の内側の走行用無段変速装置１１の走行用ポンプ入力軸１４の内側端から入力し、ケース３３の外側の走行用ポンプ入力軸１４の外側端から出力させた駆動回転をファン用無段変速装置３０のファン用油圧ポンプ３１に伝達するので、回転伝動構成を簡素にでき、メンテナンス作業も容易にできる。
請求項３記載の発明では、冷却用ファン２０のファン回転軸４０をウォーターポンプ４１のポンプ入力軸４２に軸受して支持しているので、構成を合理的に簡素化でき、また、冷却用ファン２０の正転時のとき、ファン回転軸４０の回転方向とポンプ入力軸４２の回転方向とを一致させているので、耐久性を向上させることができる。
請求項４記載の発明では、ファン用無段変速装置３０を操縦部６のステップ６３の下方空間を有効利用して設置できる。 According to the first aspect of the present invention, the radiator 21 and the engine 10 are cooled by switching the rotation direction of the cooling fan 20 between the forward rotation state and the reverse rotation state by the fan continuously variable transmission 30, and the radiator cover. 22 can be removed, and the driving rotation of the engine 10 is transmitted to the continuously variable transmission 30 for the fan via the continuously variable transmission 11 for traveling. Therefore, the belt transmission around the engine 10 is transmitted. The configuration can be simplified and maintenance work can be facilitated.
Further, since the trunnion shaft 71 is provided on the side opposite to the belt 45, adjustment, setting work and maintenance work can be facilitated.
According to the second aspect of the present invention, the signal is input from the inner end of the traveling pump input shaft 14 of the traveling continuously variable transmission 11 inside the case 33 and is output from the outer end of the traveling pump input shaft 14 outside the case 33. Since the driven rotation thus transmitted is transmitted to the fan hydraulic pump 31 of the fan continuously variable transmission 30, the rotation transmission configuration can be simplified and maintenance work can be facilitated.
According to the third aspect of the present invention, since the fan rotation shaft 40 of the cooling fan 20 is supported by being supported by the pump input shaft 42 of the water pump 41, the configuration can be rationally simplified, and the cooling fan At the time of 20 forward rotation, the rotation direction of the fan rotation shaft 40 and the rotation direction of the pump input shaft 42 are matched, so that durability can be improved.
According to the fourth aspect of the present invention, the fan continuously variable transmission 30 can be installed by effectively utilizing the space below the step 63 of the control unit 6.

コンバインの側面図。The side view of a combine. 冷却用ファンの伝動機構の概略を示した背面図。The rear view which showed the outline of the power transmission mechanism of the cooling fan. 同模式図。FIG. 同拡大背面図。FIG. 同側面図。The same side view. 冷却用ファンの伝動機構の他の実施例の背面図。The rear view of the other Example of the transmission mechanism of a cooling fan. 同側面図。The same side view. 同模式図。FIG. 操縦部の一部平面図。The partial top view of a control part. 走行速度の変化を示す模式図。The schematic diagram which shows the change of traveling speed. 伝動経路機構概略図。Schematic diagram of transmission path mechanism. 供給搬送チェンの逆転機構を示した概略図。Schematic which showed the reverse mechanism of a supply conveyance chain.

本発明の実施例を図面により説明すると、１はコンバインの機体フレーム、２は走行装置、３は走行装置２の上方の一側に設けた脱穀装置、４は刈取装置、５は脱穀装置４の側方に設けたグレンタンク、６は操縦部である。
走行装置２は、エンジン１０の駆動回転を無段階に変速する走行用無段変速装置（Ｈ．Ｓ．Ｔ）１１により駆動回転させ構成とし、走行用無段変速装置１１は、油圧ポンプ１２と油圧モータ１３を有して構成する。油圧ポンプ１２の走行用ポンプ入力軸１４には入力プーリー１５を設ける。入力プーリー１５にはエンジン１０の内側に設けたエンジン出力軸１６の内側出力プーリー１７との間にベルト１８を掛け回す。走行用無段変速装置１１は、図示は省略するが油圧モータ１３の出力回転をミッション（ミッションケース）１９に伝達して走行装置２を駆動させる。
前記エンジン１０は操縦部６の運転座席７の下方（後側）付近に設け、エンジン１０の外側（右側）にはエンジンの冷却用ファン２０を設ける（図２）。冷却用ファン２０の外側にラジエーター２１を設け、ラジエーター２１の外側には前記ラジエーターカバー２２を設ける。ラジエーターカバー２２に設けた開口部２３には防塵ネット２４を設ける。 An embodiment of the present invention will be described with reference to the drawings. 1 is a combiner body frame, 2 is a traveling device, 3 is a threshing device provided on one side of the traveling device 2, 4 is a reaping device, and 5 is a threshing device 4. A Glen tank 6 provided on the side is a control unit.
The traveling device 2 is configured to be driven and rotated by a traveling continuously variable transmission (HST) 11 that changes the driving rotation of the engine 10 steplessly. The traveling continuously variable transmission 11 includes a hydraulic pump 12 and It has a hydraulic motor 13. An input pulley 15 is provided on the traveling pump input shaft 14 of the hydraulic pump 12. A belt 18 is wound around the input pulley 15 and an inner output pulley 17 of an engine output shaft 16 provided inside the engine 10. The travel continuously variable transmission 11 transmits the output rotation of the hydraulic motor 13 to a mission (mission case) 19 to drive the travel device 2 although not shown.
The engine 10 is provided near the lower side (rear side) of the driver's seat 7 of the control unit 6, and an engine cooling fan 20 is provided on the outer side (right side) of the engine 10 (FIG. 2). A radiator 21 is provided outside the cooling fan 20, and the radiator cover 22 is provided outside the radiator 21. A dust-proof net 24 is provided in the opening 23 provided in the radiator cover 22.

前記冷却用ファン２０はエンジン１０の駆動回転を無段階に変速するファン無段変速装置（Ｈ．Ｓ．Ｔ）３０により正逆駆動回転させる。ファン用無段変速装置３０は、ファン用油圧ポンプ３１とファン用油圧モータ３２を有して構成する。
ファン用無段変速装置３０は、前記走行装置２を無段階に変速する走行用無段変速装置１１の走行用ポンプ入力軸１４から駆動回転を入力する構成とし、前記走行用無段変速装置１１の油圧ポンプ１２から外側に延長させた前記走行用ポンプ入力軸１４からの回転を伝達する。
前記走行用無段変速装置１１の走行用ポンプ入力軸１４はケース３３より内側に突出する一端（内側端）にエンジン１０からの回転を入力する前記入力プーリー１５を設け、前記ケース３３の外側に走行用ポンプ入力軸１４の他端（外側端）を延長させ、該走行用ポンプ入力軸１４の外側突出部から前記ファン用無段変速装置３０のファン用油圧ポンプ３１に向けて回転出力する構成とする。 The cooling fan 20 is rotated in the forward and reverse directions by a fan continuously variable transmission (HST) 30 that continuously changes the drive rotation of the engine 10. The fan continuously variable transmission 30 includes a fan hydraulic pump 31 and a fan hydraulic motor 32.
The continuously variable transmission 30 for a fan is configured to receive driving rotation from the traveling pump input shaft 14 of the continuously variable transmission 11 for continuously shifting the traveling device 2, and the continuously variable transmission 11 for traveling. The rotation from the traveling pump input shaft 14 extended outward from the hydraulic pump 12 is transmitted.
The traveling pump input shaft 14 of the traveling continuously variable transmission 11 is provided with the input pulley 15 for inputting rotation from the engine 10 at one end (inner end) protruding inward from the case 33, and outside the case 33. A configuration in which the other end (outer end) of the traveling pump input shaft 14 is extended and rotated and outputted from the outer projecting portion of the traveling pump input shaft 14 toward the fan hydraulic pump 31 of the fan continuously variable transmission 30. And

即ち、走行用無段変速装置１１の走行用ポンプ入力軸１４は、走行用ポンプ入力軸１４の一端１４Ａに前記入力プーリー１５を設け、走行用ポンプ入力軸１４の中間部は走行用無段変速装置１１のケース３３を貫通させ、走行用ポンプ入力軸１４の他端１４Ｂは油圧ポンプ１２（ケース３３）よりも外側に延長させて突出させ、この走行用ポンプ入力軸１４の他端１４Ｂに中間出力プーリー３５を設け、中間出力プーリー３５と前記ファン用油圧ポンプ３１の入力プーリー３６との間にベルト３７を掛け回す。
そのため、走行用無段変速装置１１に伝達する回転伝動機構を利用してファン用無段変速装置３０のファン用油圧ポンプ３１に回転を入力するので、エンジン１０周辺のベルト伝動構成を簡素にし、メンテナンス作業を容易にする。
ファン用無段変速装置３０への回転伝達を一本のベルト３７で行えるので、この点でも、構成を簡素にしてメンテナンス作業を容易にする。 That is, the traveling pump input shaft 14 of the traveling continuously variable transmission 11 is provided with the input pulley 15 at one end 14A of the traveling pump input shaft 14, and the intermediate portion of the traveling pump input shaft 14 is the traveling continuously variable transmission. The other end 14B of the traveling pump input shaft 14 is extended outward from the hydraulic pump 12 (case 33) and protrudes through the case 33 of the device 11, and is intermediate to the other end 14B of the traveling pump input shaft 14. An output pulley 35 is provided, and a belt 37 is wound around the intermediate output pulley 35 and the input pulley 36 of the fan hydraulic pump 31.
Therefore, since rotation is input to the fan hydraulic pump 31 of the fan continuously variable transmission 30 using the rotation transmission mechanism that transmits to the traveling continuously variable transmission 11, the belt transmission configuration around the engine 10 is simplified. Make maintenance work easier.
Since the rotation transmission to the fan continuously variable transmission 30 can be performed by the single belt 37, the configuration is simplified and the maintenance work is facilitated also in this respect.

前記冷却用ファン２０のファン回転軸４０は、前記エンジン１０の所定位置に設けた冷却水を循環させるウォーターポンプ４１のポンプ入力軸４２に二重軸状態に回転自在に嵌合させて軸装する。前記冷却用ファン２０のファン回転軸４０には入力プーリー４３を設け、前記ファン用油圧モータ３２の回転が出力される出力プーリー４４との間にベルト４５を掛け回す。
したがって、エンジン１０に軸装したファン回転軸４０の軸心から外れた位置にファン用無段変速装置３０を設け、冷却用ファン２０の送風範囲外に設置させられる（図４）。
この場合、冷却用ファン２０が防塵ネット３７の外側から内側へ送風する正転状態において、ファン回転軸４０の回転方向とポンプ入力軸４２の回転方向とを一致させる。 The fan rotation shaft 40 of the cooling fan 20 is rotatably mounted in a double-axis state on a pump input shaft 42 of a water pump 41 that circulates cooling water provided at a predetermined position of the engine 10. . An input pulley 43 is provided on the fan rotation shaft 40 of the cooling fan 20, and a belt 45 is wound around the output pulley 44 from which the rotation of the fan hydraulic motor 32 is output.
Therefore, the fan continuously variable transmission 30 is provided at a position off the axis of the fan rotation shaft 40 mounted on the engine 10 and is installed outside the blowing range of the cooling fan 20 (FIG. 4).
In this case, in the normal rotation state where the cooling fan 20 blows air from the outside to the inside of the dust-proof net 37, the rotation direction of the fan rotation shaft 40 and the rotation direction of the pump input shaft 42 are matched.

また、ファン回転軸４０およびポンプ入力軸４２は、エンジン１０の側面視上下および左右中間に配置し、ファン用無段変速装置３０をエンジン１０の外周所定位置に取付けると、冷却用ファン２０の送風範囲外の設置となる。
また、エンジン１０の前面側とミッションケース１９との間にファン用無段変速装置３０を設けると（図５）、冷却用ファン２０の送風範囲から外せると共に、ミッションケース１９からのベルト３７の配置を合理的にでき、ファン用無段変速装置３０のメンテナンスも容易になる。
４６はファン用油圧ポンプ３１の入力軸、４８はファン用油圧モータ３２の出力軸４７に設けた出力歯車４８、４９は中間軸４９、５０は中間軸４９に固定の中間歯車５０、５１は出力軸、５２はウォーターポンプ４１のポンプ入力軸４２に設けたエンジン１０の回転を入力する入力プーリー５２、５４は前記エンジン１０の出力軸５３に設けた出力プーリー５４、５５はベルト、５６はジェネレータ入力プーリーである。 Further, the fan rotation shaft 40 and the pump input shaft 42 are arranged in the upper and lower sides and the left and right middle in the side view of the engine 10, and when the fan continuously variable transmission 30 is mounted at a predetermined position on the outer periphery of the engine 10, Installation is out of range.
Further, when a fan continuously variable transmission 30 is provided between the front side of the engine 10 and the transmission case 19 (FIG. 5), the cooling fan 20 can be removed from the air blowing range and the belt 37 from the transmission case 19 can be arranged. And the maintenance of the fan continuously variable transmission 30 is facilitated.
46 is an input shaft of the fan hydraulic pump 31, 48 is an output gear 48 provided on the output shaft 47 of the fan hydraulic motor 32, 49 is an intermediate shaft 49, 50 is an intermediate gear 50 fixed to the intermediate shaft 49, 51 is an output The shaft 52 is an input pulley 52, 54 for inputting the rotation of the engine 10 provided on the pump input shaft 42 of the water pump 41, the output pulleys 54, 55 provided on the output shaft 53 of the engine 10 is a belt, and 56 is a generator input. It is a pulley.

したがって、ウォーターポンプ４１と冷却用ファン２０は同一軸心で支持され、ウォーターポンプ４１と冷却用ファン２０の支持構成を兼用する。
図６は、ファン用無段変速装置３０の他の実施例を示し、走行用無段変速装置１１の走行用ポンプ入力軸１４の内側の一端１４Ａに前記入力プーリー１５を設け、走行用無段変速装置１１のケース３３を貫通させて外側に延長させて突出させた走行用ポンプ入力軸１４の他端１４Ｂと、ファン用無段変速装置３０のファン用油圧ポンプ３１の入力軸６０とを同心上に配置し、走行用無段変速装置１１の走行用ポンプ入力軸１４の他端１４Ｂと入力軸６０とをカップリング機構６１により接続する。
そのため、走行用無段変速装置１１に伝達する回転伝動機構を利用してファン用無段変速装置３０のファン用油圧ポンプ３１に回転を入力し、しかも、走行用無段変速装置１１の走行用ポンプ入力軸１４の回転をベルトを介さずにファン用無段変速装置３０のファン用油圧ポンプ３１に伝達するので、伝動構成を簡素にし、メンテナンス作業を容易にする。 Therefore, the water pump 41 and the cooling fan 20 are supported by the same axis, and the supporting structure of the water pump 41 and the cooling fan 20 is also used.
FIG. 6 shows another embodiment of the continuously variable transmission 30 for the fan. The input pulley 15 is provided at one end 14A inside the traveling pump input shaft 14 of the traveling continuously variable transmission 11, and the traveling continuously variable transmission The other end 14 </ b> B of the traveling pump input shaft 14 that protrudes by extending through the case 33 of the transmission 11 and the input shaft 60 of the fan hydraulic pump 31 of the fan continuously variable transmission 30 are concentric. The other end 14 </ b> B of the traveling pump input shaft 14 of the traveling continuously variable transmission 11 is connected to the input shaft 60 by a coupling mechanism 61.
Therefore, rotation is input to the fan hydraulic pump 31 of the fan continuously variable transmission 30 using a rotation transmission mechanism that transmits to the continuously variable transmission 11 for traveling. Since the rotation of the pump input shaft 14 is transmitted to the fan hydraulic pump 31 of the fan continuously variable transmission 30 without using a belt, the transmission configuration is simplified and maintenance work is facilitated.

また、前記冷却用ファン２０のファン回転軸４０は、前記エンジン１０の所定位置に設けた冷却水を循環させるウォーターポンプ４１のポンプ入力軸４２に二重軸状態に回転自在に嵌合させて軸装する。
したがって、この点でも、伝動構成を簡素にし、メンテナンス作業を容易にする。
また、ファン用無段変速装置３０は、操縦部６のステップ６３の下方空間内に開口部７０に臨ませて設けると（図１，図７）、冷却用ファン２０との距離も近く、空間を有効利用できて、好適である。
ファン用無段変速装置３０のファン用油圧ポンプ３１を変速するトラニオン軸７１とトラニオンアーム７２は、前記ファン用油圧モータ３２の回転が伝達されるベルト４５とは反対側に設ける（図７）。
ファン用無段変速装置３０の出力は、所定時間毎に正逆転の切り替え制御を行う。例えば、ファン用無段変速装置３０が正回転出力を５分継続した後、１０秒の逆回転出力するように設定し、この正回転出力と逆回転出力との切替えを反復し、また、状況に応じて、正回転出力と逆回転出力との設定時間を変更する。 The fan rotation shaft 40 of the cooling fan 20 is rotatably fitted in a double shaft state to a pump input shaft 42 of a water pump 41 that circulates cooling water provided at a predetermined position of the engine 10. Disguise.
Therefore, also in this respect, the transmission configuration is simplified and maintenance work is facilitated.
In addition, when the fan continuously variable transmission 30 is provided in the space below the step 63 of the control unit 6 so as to face the opening 70 (FIGS. 1 and 7), the distance from the cooling fan 20 is short, and the space Can be used effectively.
The trunnion shaft 71 and the trunnion arm 72 for shifting the fan hydraulic pump 31 of the fan continuously variable transmission 30 are provided on the opposite side of the belt 45 to which the rotation of the fan hydraulic motor 32 is transmitted (FIG. 7).
The output of the fan continuously variable transmission 30 performs forward / reverse switching control every predetermined time. For example, the fan continuously variable transmission 30 is set to output a reverse rotation for 10 seconds after continuing the normal rotation output for 5 minutes, and repeatedly switching between the normal rotation output and the reverse rotation output. The set time for the forward rotation output and the reverse rotation output is changed according to.

しかして、走行装置２は、操縦部６に設けた主変速レバー８０により速度調節機構（図示省略）で走行用無段変速装置１１をコントロールして走行する（図９）。
この場合、前記操縦部６には、微速モードスイッチ８２を設け、微速モードスイッチ８２により前記速度調節機構の微速モードを入切する構成とする。
また、微速モードでは主変速レバー８０による操作における速度設定を行う速度設定ダイヤル８３により設定される最低車速より低い走行速度となるように設定する。
そのため、車への積み降ろしや畦越え等を容易に行える。
図１０のＳのラインは路上走行における走行速度を示し、Ｆのラインは作業速度における最高速設定の速度上昇を示し、Ｌのラインは作業速度における最低速設定の速度上昇を示し、Ｂのラインは微速モードにおける走行速度を示している。
前記脱穀装置３へ穀稈を搬送供給する穀稈供給搬送装置８５は、所定位置に設けた緊急スイッチ（図示省略）により穀稈供給搬送装置８５の回転を低速による逆回転させる構成とする（図１１，図１２）。 Thus, the traveling device 2 travels by controlling the traveling continuously variable transmission 11 with a speed adjusting mechanism (not shown) by the main transmission lever 80 provided in the control unit 6 (FIG. 9).
In this case, the control unit 6 is provided with a slow speed mode switch 82, and the slow speed mode switch 82 is used to turn on and off the slow speed mode of the speed adjusting mechanism.
In the fine speed mode, the traveling speed is set to be lower than the minimum vehicle speed set by the speed setting dial 83 for setting the speed in the operation by the main speed change lever 80.
For this reason, it is possible to easily load and unload vehicles, cross over a ridge, and the like.
The S line in FIG. 10 indicates the traveling speed in the road traveling, the F line indicates the maximum speed setting speed increase in the working speed, the L line indicates the minimum speed setting speed increase in the working speed, and the B line. Indicates the traveling speed in the slow speed mode.
The cereal supply / conveyance device 85 that conveys and supplies cereal to the threshing device 3 is configured to reverse the rotation of the cereal supply / conveyance device 85 at a low speed by an emergency switch (not shown) provided at a predetermined position (see FIG. 11, FIG. 12).

即ち、通常、穀稈供給搬送装置８５は、その供給搬送チェン８７が脱穀装置３の始端側から終点側へ穀稈を供給搬送させるが、緊急時に所定位置に設けた緊急スイッチ（図示省略）を操作すると、供給搬送チェン８７を逆転させ、移動方向を終端側から始端側に移動させる。
そのため、供給搬送チエン８７に挟まれた異物を速やかに除去することができる。
前記供給搬送チェン８７を逆転させる逆転機構８８を、穀稈供給搬送装置８５の回転伝達経路中に設ける。逆転機構８８はギヤケース８９に入力軸９０を軸装し、入力軸９０に第一歯車９１と第二歯車９２を設ける。ギヤケース８９には中間軸９３を軸装し、中間軸９３には正転歯車９４と逆転歯車９５を遊嵌状態に軸装し、正転歯車９４と逆転歯車９５の間に切り替えクラッチ９６を設け、クラッチ９６のシフタ（図示省略）と前記緊急スイッチとを連結する。
そのため、クラッチ９６を切り替えることによりギヤケース８９の出力軸９７の回転方向を正逆に切り換えられる。
９８Ａは中間出力プーリー、９８Ｂは入力プーリーである。 In other words, the cereal supply and transport device 85 normally feeds and transports the cereal from the start end side to the end point side of the threshing device 3, but the emergency switch (not shown) provided at a predetermined position in an emergency. When operated, the supply conveyance chain 87 is reversed and the movement direction is moved from the end side to the start side.
Therefore, the foreign matter sandwiched between the supply and conveyance chains 87 can be quickly removed.
A reversing mechanism 88 for reversing the supply / conveyance chain 87 is provided in the rotation transmission path of the grain supply / conveyance device 85. The reverse rotation mechanism 88 includes an input shaft 90 mounted on a gear case 89, and a first gear 91 and a second gear 92 are provided on the input shaft 90. An intermediate shaft 93 is mounted on the gear case 89, a normal rotation gear 94 and a reverse rotation gear 95 are axially mounted on the intermediate shaft 93, and a switching clutch 96 is provided between the normal rotation gear 94 and the reverse rotation gear 95. The shifter (not shown) of the clutch 96 is connected to the emergency switch.
Therefore, the rotation direction of the output shaft 97 of the gear case 89 can be switched between forward and reverse by switching the clutch 96.
98A is an intermediate output pulley, and 98B is an input pulley.

（実施例の作用）
エンジン１０を始動して、走行装置２により走行し、走行中に刈取装置４で刈取った穀稈を脱穀装置で脱穀する。
エンジン１０を始動すると、エンジン１０の回転がファン用無段変速装置３０に伝達され、ファン用無段変速装置３０が無段階に変速して冷却用ファン２０を正回転させ、ラジエーターカバー２２の防塵ネット２４から外気を吸引し、吸引した外気はラジエーター２１を通過してエンジン１０の冷却用の冷却水を冷却すると共に、エンジン１０の外周を冷却しながら吹き抜ける。
刈取脱穀作業を続けると、ラジエーターカバー２２の防塵ネット２４の表側に藁屑や塵埃等の付着物が付着するので、ファン用無段変速装置３０により冷却用ファン２０を逆回転させて、機体内部から機体外部方向へ送風させ、吹散させて除去する。 (Operation of Example)
The engine 10 is started, the vehicle travels with the traveling device 2, and the cereals harvested by the reaping device 4 during traveling are threshed by the threshing device.
When the engine 10 is started, the rotation of the engine 10 is transmitted to the fan continuously variable transmission 30, and the fan continuously variable transmission 30 shifts continuously to rotate the cooling fan 20 in the normal direction, and the dust cover of the radiator cover 22 is protected. Outside air is sucked from the net 24, and the sucked outside air passes through the radiator 21 to cool the cooling water for cooling the engine 10 and blows out while cooling the outer periphery of the engine 10.
When the mowing and threshing operation is continued, deposits such as sawdust and dust adhere to the front side of the dust-proof net 24 of the radiator cover 22, so that the cooling fan 20 is rotated reversely by the fan continuously variable transmission 30, The air is blown away from the aircraft and then blown away.

前記冷却用ファン２０はエンジン１０の駆動回転を無段階に変速するファン無段変速装置（Ｈ．Ｓ．Ｔ）３０により正逆駆動回転し、ファン用無段変速装置３０は走行装置２を無段階に変速する走行用無段変速装置１１の走行用ポンプ入力軸１４から駆動回転を入力する構成としているので、走行用無段変速装置１１に伝達する回転伝動機構を利用してファン用無段変速装置３０のファン用油圧ポンプ３１に回転を入力でき、エンジン１０周辺のベルト伝動構成を簡素にし、メンテナンス作業を容易にする。
前記走行用無段変速装置１１の走行用ポンプ入力軸１４はケース３３より内側に突出する一端にエンジン１０から回転入力する入力プーリー１５を設け、ケース３３の外側に走行用ポンプ入力軸１４の他端を延長させ、該走行用ポンプ入力軸１４の外側突出部から前記ファン用無段変速装置３０のファン用油圧ポンプ３１に向けて回転出力する構成としているので、ファン用無段変速装置３０への回転伝達を一本のベルト３７で行えるので、この点でも、構成を簡素にしてメンテナンス作業を容易にする。 The cooling fan 20 is driven to rotate forward and reverse by a fan continuously variable transmission (HST) 30 that continuously changes the drive rotation of the engine 10, and the fan continuously variable transmission 30 eliminates the traveling device 2. Since the driving rotation is input from the traveling pump input shaft 14 of the traveling continuously variable transmission 11 that shifts in stages, the fan continuously variable transmission is transmitted to the traveling continuously variable transmission 11. Rotation can be input to the fan hydraulic pump 31 of the transmission 30 to simplify the belt transmission configuration around the engine 10 and facilitate maintenance work.
The traveling pump input shaft 14 of the traveling continuously variable transmission 11 is provided with an input pulley 15 for rotational input from the engine 10 at one end protruding inward from the case 33, and the traveling pump input shaft 14 is provided outside the case 33. Since the end is extended and the rotation is output from the outer projecting portion of the traveling pump input shaft 14 toward the fan hydraulic pump 31 of the fan continuously variable transmission 30, the fan continuously variable transmission 30 is provided. Since this rotation transmission can be performed by one belt 37, the configuration is simplified and the maintenance work is facilitated also in this respect.

即ち、エンジン１０のエンジン出力軸１６の出力回転が、内側出力プーリー１７とベルト１８と入力プーリー１５を介して走行用ポンプ入力軸１４に伝達されて走行用無段変速装置１１の油圧ポンプ１２に入力され、油圧ポンプ１２と油圧モータ１３により変速されて走行装置２を駆動させ、一方、走行用ポンプ入力軸１４の回転がそのまま中間出力プーリー３５に出力され、中間出力プーリー３５とベルト３７と入力プーリー３６を介してファン用無段変速装置３０のファン用油圧ポンプ３１に入力され、ファン用無段変速装置３０のファン用油圧ポンプ３１とファン用油圧モータ３２により変速されて冷却用ファン２０を回転させる。
したがって、ファン用無段変速装置３０は、冷却用ファン２０の送風範囲外に設けることができ、ファン用無段変速装置３０の存在が冷却用ファン２０の送風の抵抗とならず、冷却効率を低下させない。 That is, the output rotation of the engine output shaft 16 of the engine 10 is transmitted to the traveling pump input shaft 14 via the inner output pulley 17, the belt 18 and the input pulley 15, and is transmitted to the hydraulic pump 12 of the traveling continuously variable transmission 11. It is inputted and shifted by the hydraulic pump 12 and the hydraulic motor 13 to drive the traveling device 2. On the other hand, the rotation of the traveling pump input shaft 14 is directly outputted to the intermediate output pulley 35, and the intermediate output pulley 35 and the belt 37 are input. The cooling fan 20 is input to the fan hydraulic pump 31 of the fan continuously variable transmission 30 via the pulley 36 and is shifted by the fan hydraulic pump 31 and the fan hydraulic motor 32 of the fan continuously variable transmission 30. Rotate.
Therefore, the fan continuously variable transmission 30 can be provided outside the blowing range of the cooling fan 20, and the presence of the fan continuously variable transmission 30 does not become a resistance to blowing of the cooling fan 20, and cooling efficiency is improved. Do not decrease.

この場合、冷却用ファン２０のファン回転軸４０は、エンジン１０内の所定位置に設けたウォーターポンプ４１のポンプ入力軸４２に二重軸状態に回転自在に嵌合させて軸装しているので、エンジン１０にファン回転軸４０を軸装させながら冷却用ファン２０をファン用無段変速装置３０により逆転・変速回転可能となる。
そのため、冷却用ファン２０の軸心を、エンジン１０に対して冷却効率の良好となる、エンジン１０の上下左右中間位置に配置でき、冷却用ファン２０の変速逆転と冷却効率とを両立させられ、好適である。
また、冷却用ファン２０の正転時のとき、ファン回転軸４０の回転方向とポンプ入力軸４２の回転方向とを一致させると、ファン回転軸４０とポンプ入力軸４２の間に設けた軸受の耐久性を向上させることができる。
また、ファン回転軸４０およびポンプ入力軸４２は、エンジン１０の側面視上下および左右中間に配置し、ファン用無段変速装置３０をエンジン１０の外周所定位置に取付けると、冷却用ファン２０の送風範囲外の設置とウォーターポンプ４１の回転入力構成の兼用とを簡単に構成できる。 In this case, the fan rotating shaft 40 of the cooling fan 20 is mounted so as to be rotatably fitted in a double shaft state to a pump input shaft 42 of a water pump 41 provided at a predetermined position in the engine 10. The cooling fan 20 can be rotated in reverse and variable speed by the fan continuously variable transmission 30 while the fan rotation shaft 40 is mounted on the engine 10.
Therefore, the axial center of the cooling fan 20 can be arranged at the upper, lower, left and right intermediate positions of the engine 10 where the cooling efficiency is good with respect to the engine 10, and both the reverse rotation of the cooling fan 20 and the cooling efficiency can be achieved. Is preferred.
Further, when the cooling fan 20 is rotating forward, if the rotation direction of the fan rotation shaft 40 coincides with the rotation direction of the pump input shaft 42, the bearing provided between the fan rotation shaft 40 and the pump input shaft 42 is replaced. Durability can be improved.
Further, the fan rotation shaft 40 and the pump input shaft 42 are arranged in the upper and lower sides and the left and right middle in the side view of the engine 10, and when the fan continuously variable transmission 30 is mounted at a predetermined position on the outer periphery of the engine 10, The installation outside the range and the combined use of the rotational input configuration of the water pump 41 can be easily configured.

また、エンジン１０の前面側とミッションケース１９との間にファン用無段変速装置３０を取付けているので、冷却用ファン２０の送風範囲から外せると共に、ミッションケース１９からのベルト３７の配置を合理的にでき、ファン用無段変速装置３０のメンテナンスも容易になる。
この場合、ファン用無段変速装置３０は、操縦部６のステップ６３の下方空間内に開口部７０に臨ませて設けているので、冷却用ファン２０との距離も近く、空間を有効利用できて、好適である。
ファン用無段変速装置３０のファン用油圧ポンプ３１を変速するトラニオン軸７１とトラニオンアーム７２は、前記ファン用油圧モータ３２の回転が伝達されるベルト４５とは反対側に設けているので、調節や設定作業およびメンテナンス作業を容易に行える。 Further, since the fan continuously variable transmission 30 is attached between the front side of the engine 10 and the transmission case 19, it can be removed from the air blowing range of the cooling fan 20 and the arrangement of the belt 37 from the transmission case 19 is rational. Therefore, maintenance of the fan continuously variable transmission 30 is also facilitated.
In this case, since the continuously variable transmission 30 for the fan is provided in the space below the step 63 of the control unit 6 so as to face the opening 70, the distance from the cooling fan 20 is close and the space can be used effectively. It is preferable.
The trunnion shaft 71 and the trunnion arm 72 for shifting the fan hydraulic pump 31 of the fan continuously variable transmission 30 are provided on the side opposite to the belt 45 to which the rotation of the fan hydraulic motor 32 is transmitted. And setting work and maintenance work can be done easily.

即ち、機体右側方に立ち、開口部７０からステップ６３の下方空間に手を入れてメンテナンスを行う（図７）。
図６のファン用無段変速装置３０の他の実施例では、ファン用無段変速装置３０のファン用油圧ポンプ３１の入力軸６０を走行用無段変速装置１１の走行用ポンプ入力軸１４と同心上に配置し、入力軸６０と走行用無段変速装置１１の走行用ポンプ入力軸１４とをカップリング機構６１により接続しているので、走行用無段変速装置１１に伝達する回転伝動機構を利用してファン用無段変速装置３０のファン用油圧ポンプ３１に回転を入力し、しかも、走行用無段変速装置１１の走行用ポンプ入力軸１４の回転をベルトを介さずにファン用無段変速装置３０のファン用油圧ポンプ３１に伝達するので、伝動構成を簡素にし、メンテナンス作業を容易にする。
なお、前記した各実施例は、理解を容易にするために、個別または混在させて図示および説明しているが、これらの各図の実施例は夫々種々組合せ可能であり、一部図示を他の実施例と共用している場合もあり、これらの表現によって、構成・作用等が限定されるものではなく、また、相乗効果を奏する場合も勿論存在する。 That is, standing on the right side of the machine body, the maintenance is performed by placing a hand in the space below the step 63 from the opening 70 (FIG. 7).
In another embodiment of the fan continuously variable transmission 30 in FIG. 6, the input shaft 60 of the fan hydraulic pump 31 of the fan continuously variable transmission 30 is connected to the traveling pump input shaft 14 of the traveling continuously variable transmission 11. Since the input shaft 60 and the traveling pump input shaft 14 of the traveling continuously variable transmission 11 are connected to each other by the coupling mechanism 61, the rotational transmission mechanism that transmits to the traveling continuously variable transmission 11 is disposed. Is used to input rotation to the fan hydraulic pump 31 of the fan continuously variable transmission 30 and the rotation of the traveling pump input shaft 14 of the traveling continuously variable transmission 11 is not connected to the fan. Since transmission is performed to the fan hydraulic pump 31 of the step transmission 30, the transmission configuration is simplified and maintenance work is facilitated.
Each of the above-described embodiments is illustrated and described separately or mixed for easy understanding, but the embodiments in each of these drawings can be combined in various ways, and some of the drawings may be partially illustrated. These expressions may not be used to limit the structure / action and the like, and of course there may be synergistic effects.

１…機体フレーム、２…走行装置、３…脱穀装置、４…刈取装置、５…グレンタンク、６…操縦部、１０…エンジン、１１…走行用無段変速装置、１２…油圧ポンプ、１３…油圧モータ、１４…走行用ポンプ入力軸、１５…入力プーリー、１６…エンジン出力軸、１８…ベルト、１７…内側出力プーリー、１９…ミッションケース、２０…冷却用ファン、２１…ラジエーター、２３…開口部、２４…防塵ネット、３０…ファン用無段変速装置、３１…ファン用油圧ポンプ、３２…ファン用油圧モータ、３３…ケース、３５…中間出力プーリー、３６…入力プーリー、３７…ベルト、４０…ファン回転軸、４１…ウォーターポンプ、４２…ポンプ入力軸、４３…入力プーリー、４４…出力プーリー、４５…ベルト、４７…出力軸、４８…出力歯車、４９…中間軸、５０…中間歯車、５１…出力軸、５２…入力プーリー、６０…入力軸、６１…カップリング機構、６３…ステップ、７０…開口部、７１…トラニオン軸、７２…トラニオンアーム、８０…主変速レバー、８２…微速モードスイッチ、８３…速度設定ダイヤル、８５…穀稈供給搬送装置、８７…供給搬送チェン、８８…逆転機構、８９…ギヤケース、９０…入力軸、９１…第一歯車、９２…第二歯車、９３…中間軸、９４…正転歯車、９５…逆転歯車、９６…クラッチ、９７…出力軸。   DESCRIPTION OF SYMBOLS 1 ... Airframe frame, 2 ... Traveling device, 3 ... Threshing device, 4 ... Mowing device, 5 ... Glen tank, 6 ... Steering part, 10 ... Engine, 11 ... Continuously variable transmission for traveling, 12 ... Hydraulic pump, 13 ... Hydraulic motor, 14 ... travel pump input shaft, 15 ... input pulley, 16 ... engine output shaft, 18 ... belt, 17 ... inner output pulley, 19 ... transmission case, 20 ... cooling fan, 21 ... radiator, 23 ... opening , 24 ... dust-proof net, 30 ... continuously variable transmission for fan, 31 ... hydraulic pump for fan, 32 ... hydraulic motor for fan, 33 ... case, 35 ... intermediate output pulley, 36 ... input pulley, 37 ... belt, 40 ... fan rotation shaft, 41 ... water pump, 42 ... pump input shaft, 43 ... input pulley, 44 ... output pulley, 45 ... belt, 47 ... output shaft, 48 ... output teeth 49 ... intermediate shaft, 50 ... intermediate gear, 51 ... output shaft, 52 ... input pulley, 60 ... input shaft, 61 ... coupling mechanism, 63 ... step, 70 ... opening, 71 ... trunnion shaft, 72 ... trunnion arm , 80 ... main speed change lever, 82 ... fine speed mode switch, 83 ... speed setting dial, 85 ... cereal supply and transfer device, 87 ... supply and transfer chain, 88 ... reverse rotation mechanism, 89 ... gear case, 90 ... input shaft, 91 ... first One gear, 92 ... second gear, 93 ... intermediate shaft, 94 ... forward gear, 95 ... reverse gear, 96 ... clutch, 97 ... output shaft.

Claims (4)

エンジン（１０）の駆動回転を無段階に変速して走行装置（２）を駆動する走行用無段変速装置（１１）を備え、前記エンジン（１０）の外側には、冷却用ファン（２０）と、ラジエータ（２１）と、防塵ネット（３７）とを設け、前記冷却用ファン（２０）はファン用無段変速装置（３０）により正転および逆転駆動される構成とし、前記ファン用無段変速装置（３０）には、前記走行用無段変速装置（１１）の走行用ポンプ入力軸（１４）を介してエンジン（１０）の駆動回転を入力する構成とし、ファン用無段変速装置（３０）のファン用油圧モータ（３２）の出力プーリー（４４）とファン回転軸（４０）の入力プーリー（４３）との間にベルト（４５）を掛け回し、ファン用油圧モータ（３２）の出力軸（４７）の軸心方向視で、ファン用無段変速装置（３０）におけるファン回転軸（４０）とは反対側の面にファン用油圧ポンプ（３１）を変速するトラニオン軸（７１）を設けたことを特徴とする作業車輌。 A continuously variable transmission (11) for driving to drive the traveling device (2) by continuously changing the drive rotation of the engine (10) is provided, and a cooling fan (20) is provided outside the engine (10). A radiator (21) and a dust-proof net (37), and the cooling fan (20) is driven forward and reversely by a fan continuously variable transmission (30). a transmission (30), a configuration for inputting the rotation of the engine (10) through said traveling continuously variable transmission (11) driving pump input shaft (14), continuously variable transmission fan ( 30) A belt (45) is hung between the output pulley (44) of the fan hydraulic motor (32) and the input pulley (43) of the fan rotation shaft (40) to output the fan hydraulic motor (32). In the axial direction view of the shaft (47), Working vehicle, characterized by comprising trunnion shaft for shifting the hydraulic pump fan (31) on the opposite side (71) of the fan rotation axis in the continuously variable transmission for § emissions (30) (40). 請求項１記載の作業車輌において、前記走行用無段変速装置（１１）のケース（３３）から機体内側に突出する走行用ポンプ入力軸（１４）の内側端にエンジン（１０）の駆動回転を入力する入力プーリー（１５）を設け、前記走行用ポンプ入力軸（１４）の外側端を前記ケース（３３）から機体外側に延長させ、走行用ポンプ入力軸（１４）の外側端から前記ファン用無段変速装置（３０）のファン用油圧ポンプ（３１）に向けて駆動回転を出力する構成とし、前記走行用ポンプ入力軸（１４）の外側端には前記ファン用油圧ポンプ（３１）に向けて駆動回転を出力する中間出力プーリー（３５）またはファン用無段変速装置（３０）のファン用油圧ポンプ（３１）の入力軸（４６）に接続するカップリング機構（６１）を設けたことを特徴とする作業車輌。   The working vehicle according to claim 1, wherein the driving rotation of the engine (10) is applied to an inner end of a traveling pump input shaft (14) protruding from the case (33) of the traveling continuously variable transmission (11) to the inside of the machine body. An input pulley (15) for input is provided, the outer end of the traveling pump input shaft (14) is extended from the case (33) to the outside of the machine body, and the outer end of the traveling pump input shaft (14) is used for the fan. Drive rotation is output toward the fan hydraulic pump (31) of the continuously variable transmission (30), and the outer end of the traveling pump input shaft (14) is directed toward the fan hydraulic pump (31). A coupling mechanism (61) that is connected to the input shaft (46) of the intermediate output pulley (35) that outputs the drive rotation or the fan hydraulic pump (31) of the continuously variable transmission (30) for the fan. Special Working vehicle to be. 請求項１または請求項２記載の作業車輌において、前記冷却用ファン（２０）のファン回転軸（４０）は、前記エンジン（１０）の外側部に設けた冷却水を循環させるウォーターポンプ（４１）のポンプ入力軸（４２）に回転自在に軸受し、冷却用ファン（２０）が防塵ネット（３７）の外側から内側へ送風する正転状態において、ファン回転軸（４０）の回転方向とポンプ入力軸（４２）の回転方向とが一致する構成としたことを特徴とする作業車輌。   The working vehicle according to claim 1 or 2, wherein the fan rotation shaft (40) of the cooling fan (20) is a water pump (41) that circulates cooling water provided in an outer portion of the engine (10). In the forward rotation state where the cooling fan (20) blows air from the outside to the inside of the dust-proof net (37) and the rotation direction of the fan rotation shaft (40) and the pump input A working vehicle having a configuration in which the rotation direction of the shaft (42) coincides. 請求項１または請求項２または請求項３記載の作業車輌において、前記エンジン（１０）の上側に操縦部（６）を設け、前記ファン用無段変速装置（３０）は、操縦部（６）のステップ（６３）の下方空間内に配置したことを特徴とする作業車輌。   The working vehicle according to claim 1, claim 2, or claim 3, wherein a steering part (6) is provided on the upper side of the engine (10), and the continuously variable transmission for a fan (30) includes the steering part (6). A working vehicle, which is disposed in a lower space of step (63).
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