JP5804612B2 - Work vehicle - Google Patents

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Publication number
JP5804612B2
JP5804612B2 JP2014059426A JP2014059426A JP5804612B2 JP 5804612 B2 JP5804612 B2 JP 5804612B2 JP 2014059426 A JP2014059426 A JP 2014059426A JP 2014059426 A JP2014059426 A JP 2014059426A JP 5804612 B2 JP5804612 B2 JP 5804612B2
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pair
gear
frame
case
transmission
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JP2014129094A (en
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松岡 秀樹
秀樹 松岡
井上 誠
誠 井上
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Yanmar Co Ltd
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Yanmar Co Ltd
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本発明は例えば苗載台及び苗植付爪を備えて連続的に苗植作業を行う田植機またはトラクタまたはコンバインまたは土木建機などの作業車に関する。   The present invention relates to a work vehicle such as a rice transplanter, a tractor, a combine, or a civil construction machine that includes a seedling stage and a seedling planting claw and continuously performs seedling planting work.

本発明は、前後方向に沿って延びる左右一対の車体フレームと、前記一対の車体フレームに支持されたエンジンと、前記エンジンから回転動力を入力するミッションケースと、前記ミッションケースの左右の両側方に連結された左右一対のフロントアクスルケースと、前記左右一対のフロントアクスルケースに支持された左右一対の前輪と、前記ミッションケースから後方に離間配置されたリヤアクスルケースと、前記リヤアクスルケースに支持された左右一対の後輪とを備え、前記ミッションケースと前記左右一対のフロントアクスルケースと前記左右一対の前輪とがフロントアクスルアッセンブリを形成し、前記リヤアクスルケースと前記左右一対の後輪とがリヤアクスルアッセンブリを形成し、前記左右一対の車体フレームは、車体前後方向中間に位置し且つ前記一対のフロントアクスルケースに連結された左右一対の中間フレームと、後端部が前記左右一対の中間フレームのそれぞれに着脱自在に連結された左右一対の前部フレームと、前端部が前記左右一対の中間フレームのそれぞれに着脱自在に連結され且つ後端部が前記リヤアクスルアッセンブリに間接的に着脱自在に連結された左右一対の後部フレームとを有している作業車を提供する。
The present invention includes a pair of left and right body frames extending in the front-rear direction, an engine supported by the pair of body frames, a transmission case that inputs rotational power from the engine, and left and right sides of the transmission case. A pair of left and right front axle cases connected to each other, a pair of left and right front wheels supported by the pair of left and right front axle cases, a rear axle case spaced apart from the transmission case, and left and right sides supported by the rear axle case and a pair of rear wheels, and said transmission case and said pair of left and right front axle case and the pair of left and right front wheels form a front axle assembly, and the rear axle case and the pair of left and right rear wheels forming the rear axle assembly and the pair of left and right vehicle body frames, the body front A pair of left and right intermediate frame connected to the position and and the pair of front axle case in a direction intermediate, a pair of right and left front frame detachably coupled to the respective rear end portion the pair of left and right intermediate frame, the work vehicle front end portion and a respective detachably connected to and rear end indirectly detachably linked pair between the rear axle assembly rear frame of the pair of left and right intermediate frame provide.

好ましくは、前記一対の前部フレームは、車体前後方向前側において車体幅方向に延びる前フレームを介して互いに対して連結され且つ前記前フレームより車体前後方向後方側において車体幅方向に延びるベースフレームを介して互いに対して連結されることで、平面視四角状の枠体を形成し得る。
より好ましくは、前記エンジンは、前記枠体に支持され得る。
Preferably, the pair of front frames are connected to each other via a front frame extending in the vehicle body width direction on the vehicle body front-rear direction front side and a base frame extending in the vehicle body width direction on the vehicle body front-rear direction rear side from the front frame. By being connected to each other, a rectangular frame body in a plan view can be formed.
More preferably, the engine can be supported by the frame.

田植機の全体側面図。Whole side view of rice transplanter. 田植機の全体平面図。Overall plan view of rice transplanter. 走行車体の側面図。The side view of a traveling vehicle body. 走行車体の平面図。The top view of a traveling vehicle body. 車体フレームの側面図。The side view of a vehicle body frame. 駆動部の側面説明図。Side surface explanatory drawing of a drive part. 駆動部の平面説明図。Plane explanatory drawing of a drive part. サイドクラッチ操作系の側面説明図。Side surface explanatory drawing of a side clutch operation system. サイドクラッチ操作系の平面説明図。Plane explanatory drawing of a side clutch operation system. 車体の斜視説明図。FIG. ミッションケースの断面図。Sectional drawing of a mission case. 同拡大図。The enlarged view. 遊星ギヤ機構の説明図。Explanatory drawing of a planetary gear mechanism. ミッションケースの部分図。Partial view of the mission case. 遊星ギヤ機構の断面図。Sectional drawing of a planetary gear mechanism. 変速ペダル部の前方からの斜視図。The perspective view from the front of a speed-change pedal part. 変速ペダル部の後側上方からの斜視図。The perspective view from the rear upper side of a shift pedal part. ミッションケースのギヤ配列説明図。Gear arrangement explanatory drawing of a mission case. 油圧変速操作アーム部の側面図。The side view of a hydraulic transmission operation arm part. 遊星ギヤ機構の回転説明図。Rotation explanatory drawing of a planetary gear mechanism. エンジンの出力説明図。Engine output explanatory drawing. 油圧変速機構の出力説明図。The output explanatory view of a hydraulic speed change mechanism. 伝達ギヤ側の出力説明図。The output explanatory view by the side of the transmission gear. 合成出力軸の出力説明図。The output explanatory view of a synthetic output shaft. 変速ペダルの変速説明図。Shift explanatory drawing of a shift pedal. 油圧変速出力とギヤ変速出力の相関図。FIG. 4 is a correlation diagram between a hydraulic shift output and a gear shift output. 図26の出力と油圧損失及びギヤ損失の相関図。FIG. 27 is a correlation diagram between the output of FIG. 26, hydraulic pressure loss, and gear loss. ミッションケースの平面説明図。Plane explanatory drawing of a mission case. ミッションケースの平面断面図。The plane sectional view of a mission case. ミッションケースの側面断面図。Side surface sectional drawing of a mission case.

以下、本発明の実施例を図面に基づいて詳述する。図1は全体の側面図、図2は同平面図、図3は車体フレームの側面図、図4は同平面図を示し、図中1は作業者が搭乗する走行車であり、エンジン2を車体フレーム3に搭載させ、ミッションケース4側方にフロントアクスルケース5を介して水田走行用前輪6を支持させると共に、前記ミッションケース4後方のリヤアクスルケース7に水田走行用後輪8を支持させる。そして前記エンジン2等を覆うボンネット9両側に予備苗載台10を取付けると共に、作業者が搭乗する車体カバー11によって前記ミッションケース4等を覆い、前記車体カバー11後側上方にシートフレーム12を介して運転席13を取付け、その運転席13の前方で前記ボンネット9後部に操向ハンドル14を設ける。   Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of the whole, FIG. 2 is a plan view of the same, FIG. 3 is a side view of a vehicle body frame, FIG. 4 is a plan view of the body, and 1 is a traveling vehicle on which an operator rides. Mounted on the vehicle body frame 3, the front wheel 6 for paddy field traveling is supported on the side of the transmission case 4 via the front axle case 5, and the rear wheel 8 for paddy field traveling is supported on the rear axle case 7 behind the transmission case 4. The spare seedling stage 10 is attached to both sides of the bonnet 9 that covers the engine 2 and the like, and the mission case 4 and the like are covered by a vehicle body cover 11 on which an operator rides, and a seat frame 12 is disposed above and behind the vehicle body cover 11 via a seat frame 12. A driver's seat 13 is attached, and a steering handle 14 is provided at the rear of the bonnet 9 in front of the driver's seat 13.

また、図中15は5条植え用の苗載台16並びに複数の苗植付爪17などを具備する植付部であり、前高後低の合成樹脂製の前傾式苗載台16を下部レール18及びガイドレール19を介して植付ケース20に左右往復摺動自在に支持させると共に、一方向に等速回転させるロータリケース21を前記植付ケース20に支持させ、該ケース21の回転軸芯を中心に対称位置に一対の爪ケース22・22を配設し、その爪ケース22・22先端に苗植付爪17・17を取付ける。   In the figure, reference numeral 15 denotes a planting part having a seedling mounting table 16 for five-row planting and a plurality of seedling planting claws 17. The planting case 20 is supported by the planting case 20 through the lower rail 18 and the guide rail 19 so as to be slidable in the left and right directions, and a rotary case 21 that rotates at a constant speed in one direction is supported by the planting case 20. A pair of nail cases 22 and 22 are arranged at symmetrical positions around the axis, and seedling planting nails 17 and 17 are attached to the tips of the nail cases 22 and 22.

また、前記植付ケース20前側のヒッチブラケット23をトップリンク24及びロワーリンク25を含む昇降リンク機構26を介し走行車1後側に連結させ、前記リンク機構26を介して植付部15を昇降させる油圧昇降シリンダ27をロワーリンク25に連結させ、前記前後輪6・8を走行駆動して移動すると同時に、左右に往復摺動させる苗載台16から一株分の苗を植付爪17によって取出し、連続的に苗を植える田植作業を行うように構成する。   Further, the hitch bracket 23 on the front side of the planting case 20 is connected to the rear side of the traveling vehicle 1 through an elevating link mechanism 26 including a top link 24 and a lower link 25, and the planting unit 15 is moved up and down via the link mechanism 26. The hydraulic lifting cylinder 27 is connected to the lower link 25, and the front and rear wheels 6 and 8 are driven to move, and at the same time, the seedlings 16 are slid back and forth, and one seedling is planted by the planting claws 17. It is configured to carry out rice transplanting work to take out and plant seedlings continuously.

また、図中28は主変速レバー、29は植付部15の昇降・植付クラッチの入切・マーカ操作を行う植付操作レバー、30はブレーキペダル、31は変速ペダル、32はデフロックペダル、33は感度調節レバー、34は植付部15を任意高さ位置に停止させるストップレバー、35はユニットクラッチレバー35であり、操向ハンドル14位置近傍に変速及び昇降レバー28・29やブレーキ及び変速ペダル30・31を配設すると共に、運転席13位置近傍に感度調節及びストップ及びユニットクラッチの各レバー33・34・35やデフロックペダル32を配設している。   In the figure, 28 is a main speed change lever, 29 is a planting operation lever for raising and lowering the planting part 15, planting clutch on / off, and marker operation, 30 is a brake pedal, 31 is a speed change pedal, 32 is a diff lock pedal, 33 is a sensitivity adjusting lever, 34 is a stop lever for stopping the planting portion 15 at an arbitrary height position, and 35 is a unit clutch lever 35. The shift and elevating levers 28 and 29, brakes and shifts are located near the steering handle 14 position. The pedals 30 and 31 are disposed, and the sensitivity adjustment and stop and unit clutch levers 33, 34, and 35 and the differential lock pedal 32 are disposed in the vicinity of the position of the driver's seat 13.

さらに、図中36は1条分均平用センタフロート、37は2条分均平用サイドフロート、38は肥料ホッパ39内の肥料を送風機40の送風力でフレキシブル形搬送ホース41を介しフロート36・37の側条作溝器42に排出させる5条用側条施肥機である。   Further, in the figure, 36 is a center float for leveling of one strip, 37 is a side float for leveling of two strips, 38 is a float 36 through the flexible conveying hose 41 by using the blowing force of the blower 40 for fertilizer in the fertilizer hopper 39. -It is a 5-way side strip fertilizer machine which makes it discharge to 37 side strip groover 42.

図3乃至図5に示す如く、前記車体フレーム3は前部フレーム43と中間フレーム44と後部フレーム45とに3分割させ、左右一対の前部フレーム43にエンジン2を、左右一対の中間フレーム44にフロントアクスルケース5を、左右一対の後部フレーム45にリヤアクスルケース7及びエンジン2に燃料を供給する燃料タンク46などを設けるもので、前部フレーム43の前側と中間に前フレーム47とベースフレーム48を連結させて平面視4角枠状に形成し、固定ブラケット49とベースフレーム48に防振ゴムを介しエンジン2を上載させる。   3 to 5, the vehicle body frame 3 is divided into a front frame 43, an intermediate frame 44, and a rear frame 45. The engine 2 is connected to the pair of left and right front frames 43, and the pair of left and right intermediate frames 44. A front axle case 5, a pair of left and right rear frames 45 are provided with a rear axle case 7 and a fuel tank 46 for supplying fuel to the engine 2. A front frame 47 and a base frame 48 are provided between the front side and the middle of the front frame 43. Are connected to form a quadrangular frame shape in plan view, and the engine 2 is mounted on the fixed bracket 49 and the base frame 48 via vibration-proof rubber.

また図10にも示す如く、前記後部フレーム45の中間立上り部50間をパイプフレーム51と門形フレーム52とで略平行に連結させると共に、リヤアクスルケース7に左右下端を固設する門形フレーム53の後端を一体連結させ、前記の左右の立上り部50間に燃料タンク46を配設する。   Further, as shown in FIG. 10, the intermediate rising portion 50 of the rear frame 45 is connected in a substantially parallel manner by a pipe frame 51 and a portal frame 52, and a portal frame 53 in which the left and right lower ends are fixed to the rear axle case 7. The fuel tank 46 is disposed between the left and right rising portions 50 by connecting the rear ends of the rear ends.

さらに、前部フレーム43後端と後部フレーム45前端に左右中間フレーム44の前後端をボルト54を介して取外し自在に固定させると共に、左右中間フレーム44の下面にボルト55を介して左右フロントアクスルケース5を取外し自在に固定させ、前記ミッションケース4に左右フロントアクスルケース5を接続固定させる。   Further, the front and rear ends of the left and right intermediate frame 44 are detachably fixed to the rear end of the front frame 43 and the front end of the rear frame 45 via bolts 54, and the left and right front axle cases are fixed to the lower surface of the left and right intermediate frames 44 via bolts 55. The left and right front axle case 5 is connected and fixed to the transmission case 4.

図6乃至図9に示す如く、前記ミッションケース4の前面左側にパワーステアリングケース56を設け、かつケース4の右側に無段油圧変速機構57を設け、油圧変速機構57の変速入力用ポンプ軸58を車体前方向に突出させ、エンジン2下側で前後方向の伝達軸59にポンプ軸58を連結させると共に、エンジン2の出力軸60に伝達ベルト61を介して前記伝達軸59を連結させ、エンジン2出力を油圧変速機構57に伝達する。   As shown in FIGS. 6 to 9, a power steering case 56 is provided on the front left side of the transmission case 4 and a continuously variable hydraulic transmission mechanism 57 is provided on the right side of the case 4. And the pump shaft 58 is connected to the transmission shaft 59 in the front-rear direction at the lower side of the engine 2, and the transmission shaft 59 is connected to the output shaft 60 of the engine 2 via the transmission belt 61. Two outputs are transmitted to the hydraulic transmission mechanism 57.

また、前記ミッションケース4とリヤアクスルケース7を車体の前後方向の中心ライン上でパイプ製の連結フレーム62によって一体連結させ、ミッションケース4後方にリヤ出力軸63及びPTO出力軸64を突出させ、リヤアクスルケース7前方に突出させるリヤ入力軸65にリヤ伝達軸66を介し前記リヤ出力軸63を連結させ、走行出力軸63から左右の後輪8に動力を伝える。またリヤアクスルケース7上部の軸受67に設ける中介軸68に自在継手軸69を介して前記PTO出力軸64を連結させ、前記植付ケース20の入力軸に自在継手軸を介して中介軸68を連結させ、PTO出力軸64から植付部15に動力を伝える。   Further, the transmission case 4 and the rear axle case 7 are integrally connected by a connecting frame 62 made of pipe on the center line in the longitudinal direction of the vehicle body, and the rear output shaft 63 and the PTO output shaft 64 are projected to the rear of the transmission case 4 so that the rear axle is The rear output shaft 63 is connected via a rear transmission shaft 66 to a rear input shaft 65 that protrudes forward of the case 7, and power is transmitted from the traveling output shaft 63 to the left and right rear wheels 8. Further, the PTO output shaft 64 is connected via a universal joint shaft 69 to an intermediate shaft 68 provided on the bearing 67 at the upper part of the rear axle case 7, and the intermediate shaft 68 is connected to the input shaft of the planting case 20 via a universal joint shaft. Power is transmitted from the PTO output shaft 64 to the planting unit 15.

さらに、図11乃至図20に示す如く、前記ミッションケース4は、本体胴部70と、前蓋部71と、後蓋部72を備え、前記胴部70の前後に各蓋部72を着脱自在にボルト固定させ、密閉箱形に形成すると共に、前記胴部70の内部を前後に分割する仕切り壁部73を設ける。また、前蓋部71前面に前記油圧変速機構57を取付け、ミッションケース4内に突出させるポンプ軸58に小径の伝達ギヤ74を係合軸支させ、伝達ギヤ74を前蓋部71にベアリング軸受し、後蓋部72後面に固定させるチャージポンプ75に伝達ギヤ74の動力をパイプ軸76を介して伝える。   Further, as shown in FIGS. 11 to 20, the transmission case 4 includes a main body barrel 70, a front lid 71, and a rear lid 72, and each lid 72 can be attached to and removed from the front and rear of the trunk 70. A partition wall portion 73 that divides the inside of the body portion 70 into the front and the rear is provided. Further, the hydraulic transmission mechanism 57 is attached to the front surface of the front lid portion 71, a small-diameter transmission gear 74 is supported on the pump shaft 58 that protrudes into the transmission case 4, and the transmission gear 74 is attached to the front lid portion 71 as a bearing bearing. Then, the power of the transmission gear 74 is transmitted via the pipe shaft 76 to the charge pump 75 that is fixed to the rear surface of the rear lid portion 72.

また、前記ミッションケース4内に突出させる油圧変速機構57のモータ軸77にサンギヤ78を係合軸支させ、サンギヤ78を前蓋部71にベアリング軸受すると共に、前記の小径の伝達ギヤ74に大径のキャリヤギヤ79を常に噛合させ、サンギヤ78のボス部にキャリヤギヤ79を遊転軸支させるもので、キャリヤギヤ79に3枚のプラネタリギヤ80を軸81を介して回転自在に設け、サンギヤ78にプラネタリギヤ80を噛合させると共に、プラネタリギヤ80に噛合させるリングギヤ82を設け、各ギヤ78・80・82によって遊星ギヤ機構83を形成する。   Further, a sun gear 78 is supported on the motor shaft 77 of the hydraulic transmission mechanism 57 that protrudes into the transmission case 4, and the sun gear 78 is bearing-supported on the front lid 71, and the small-diameter transmission gear 74 is large. The carrier gear 79 having a diameter is always meshed with the boss of the sun gear 78 and the carrier gear 79 is supported on the free rotation shaft. And a ring gear 82 that meshes with the planetary gear 80 is provided, and the planetary gear mechanism 83 is formed by the gears 78, 80, and 82.

また、前記サンギヤ78と後蓋部72に合成出力軸84の前後を回転自在に軸支させ、前記リングギヤ82を合成出力軸84に係合軸支させるもので、油圧変速機構57の油圧ポンプ85及び油圧モータ86の無段油圧変速出力である正逆回転出力と、伝達ギヤ74及びキャリヤギヤ79の減速回転出力(一方向の一定回転)とを、遊星ギヤ機構83のデフ作用によって合成し、ゼロ乃至最大速の一方向の回転力として合成出力軸84に伝える。   Further, the sun gear 78 and the rear cover portion 72 are rotatably supported on the front and rear of the combined output shaft 84, and the ring gear 82 is supported on the combined output shaft 84 to be engaged with the hydraulic pump 85 of the hydraulic transmission mechanism 57. And the forward / reverse rotation output, which is a continuously variable hydraulic shift output of the hydraulic motor 86, and the reduced rotation output (one-way constant rotation) of the transmission gear 74 and the carrier gear 79 are combined by the differential action of the planetary gear mechanism 83 to obtain zero. Or transmitted to the combined output shaft 84 as a rotational force in one direction at the maximum speed.

さらに、前記合成出力軸84に前進ギヤ87と後進ギヤ88を遊転軸支させ、合成出力軸84に各ギヤ87・88をスライダ89によって選択的に係合させ、前進または中立または後進の出力に切換えると共に、仕切り壁部73と後蓋部72に前記リヤ出力軸63をベアリング軸受する。また、差動ギヤ90を介して左右の前車軸91に動力を伝えるフロント出力軸92と、PTO変速ギヤ93を係合軸支させるカウンタ軸94を設け、前記のリヤ及びフロント出力軸63・92に出力ギヤ95・96を介して後進ギヤ88の後進動力を伝え、前後輪6・8を後進駆動させると共に、リヤ出力軸63に移動ギヤ97及び植付ギヤ98を遊転軸支させ、副変速スライダ99によって各ギヤ97・98をリヤ出力軸63に選択的に係合させる。   Furthermore, a forward gear 87 and a reverse gear 88 are supported on the combined output shaft 84 as idle shafts, and the gears 87 and 88 are selectively engaged with the combined output shaft 84 by a slider 89 to output forward, neutral or reverse. In addition, the rear output shaft 63 is bearing-bearing on the partition wall portion 73 and the rear lid portion 72. Further, a front output shaft 92 that transmits power to the left and right front axles 91 via a differential gear 90 and a counter shaft 94 that supports the PTO transmission gear 93 are provided, and the rear and front output shafts 63 and 92 are provided. The rear power of the reverse gear 88 is transmitted to the rear output shaft 95 through the output gears 95 and 96 to drive the front and rear wheels 6 and 8 in reverse, and the rear output shaft 63 is supported by the movable gear 97 and the planting gear 98 for rotation. The gears 97 and 98 are selectively engaged with the rear output shaft 63 by the speed change slider 99.

また、カウンタ軸94の高速用ギヤ100を介して前進ギヤ87に移動ギヤ97を常に噛合させると共に、カウンタ軸94の低速用のPTO変速ギヤ93に植付ギヤ98を常に噛合させ、各ギヤ100・93・98を介して前進ギヤ87の動力を前記各出力軸63・92に伝え、前後輪6・8を苗の植付け作業速度で前進駆動する。また、移動ギヤ97と植付ギヤ98の両方が遊転状態となり、植付爪17などを作業者が手で回転させて詰った苗の除去などを行えるように、PTO出力軸64の手動回転を可能にすると共に、前進ギヤ87の動力を各ギヤ100・97を介して各出力軸63・92に伝え、圃場間の路上移動などの高速の移動速度で前後輪6・8を前進駆動する。   Further, the moving gear 97 is always meshed with the forward gear 87 via the high speed gear 100 of the counter shaft 94, and the planting gear 98 is always meshed with the low speed PTO transmission gear 93 of the counter shaft 94. The power of the forward gear 87 is transmitted to the output shafts 63 and 92 through 93 and 98, and the front and rear wheels 6 and 8 are driven forward at the seedling planting operation speed. In addition, the PTO output shaft 64 is manually rotated so that both the moving gear 97 and the planting gear 98 are in an idle state, and the planting claw 17 and the like can be manually rotated by the operator to remove the seedling clogged. In addition, the power of the forward gear 87 is transmitted to the output shafts 63 and 92 via the gears 100 and 97, and the front and rear wheels 6 and 8 are driven forward at a high moving speed such as road movement between fields. .

さらに、図12のように、PTO変速軸101及びPTO変速機構102を介してPTO変速ギヤ93の動力をPTO出力軸64に伝え、株間変速自在に植付部15を駆動すると共に、ミッションケース4に内設させるチェン103を介してPTO出力軸64に施肥出力軸104を連結させ、植付部15と同調させて施肥機38を駆動する。また、図13のように、ミッションケース4にオイルゲージ105を設けると共に、図14のように、前記各スライダ89・99を同一のシフトフォーク106に係止させ、変速レバー28の5位置切換によって前後進及び副変速(低高速)の切換を行う。また、図16乃至図18のように、油圧ポンプ85の斜板107に制御軸108を介して油圧変速操作アーム109を連結させ、該アーム109にロッド110を介して変速ペダル31を連結させると共に、ペダル31の足踏み解除によってペダル31を自動的に停止(速度ゼロ)位置に復帰動作させるバネ111を前記アーム109に連結させ、また定速作動部材であるオイルダンパ112を前記アーム109に連結させ、踏み込んでいたペダル31から足を離したとき、オイルダンパ112の抵抗とバネ111の復動力によりペダル31が緩やかな略一定速度で戻って除々に低速になる動作を行わせる。なお、オイルダンパ112に代え、ガススプリングなどによって定速作動部材を形成してもよい。   Further, as shown in FIG. 12, the power of the PTO transmission gear 93 is transmitted to the PTO output shaft 64 via the PTO transmission shaft 101 and the PTO transmission mechanism 102 to drive the planting portion 15 so as to be able to shift between the stocks. The fertilizer output shaft 104 is connected to the PTO output shaft 64 via the chain 103 installed in the plant, and the fertilizer machine 38 is driven in synchronization with the planting unit 15. Further, as shown in FIG. 13, the transmission case 4 is provided with an oil gauge 105, and as shown in FIG. 14, the sliders 89 and 99 are locked to the same shift fork 106, and the shift lever 28 is switched by five positions. Switch between forward / reverse and sub-shift (low / high speed). Further, as shown in FIGS. 16 to 18, the hydraulic speed change operation arm 109 is connected to the swash plate 107 of the hydraulic pump 85 via the control shaft 108, and the speed change pedal 31 is connected to the arm 109 via the rod 110. The spring 111 for automatically returning the pedal 31 to the stop (zero speed) position when the pedal 31 is released is connected to the arm 109, and the oil damper 112, which is a constant speed operating member, is connected to the arm 109. When the foot is released from the pedal 31 that has been stepped on, the pedal 31 returns at a gentle and substantially constant speed due to the resistance of the oil damper 112 and the return force of the spring 111, and the operation gradually decreases. Instead of the oil damper 112, a constant speed operation member may be formed by a gas spring or the like.

さらに、図20のように、前記ペダル31から足を離している状態でバネ111によってペダル31が停止(速度ゼロ)位置に戻っているとき、サンギヤ78は最高回転で時計回りに逆転してプラネタリギヤ80を反時計回りに自転させる動作を行わせると同時に、また伝達ギヤ74によってキャリヤギヤ79を回転させることにより、プラネタリギヤ80を時計方向に公転させて反時計回りに自転させる動作を行わせ、リングギヤ82の回転をゼロにし、合成出力軸84を停止維持する。また、ペダル31をバネ111に抗して中位置(中速域)に足で踏んだとき、サンギヤ78は停止し、伝達ギヤ74によってキャリヤギヤ79を回転させ、プラネタリギヤ80を時計方向に自転させ乍ら時計方向に公転させ、伝達ギヤ74のギヤ動力により合成出力軸84を回転させる。また、ペダル31を最大に踏み込んだとき、サンギヤ78は最高回転で反時計回りに正転し、プラネタリギヤ80を時計方向に自転させ乍ら伝達ギヤ74でキャリヤギヤ79を回転させることによって時計方向に公転させ、サンギヤ78からの油圧変速力と伝達ギヤ74動力を加算して合成出力軸84を回転させるもので、図21のように、エンジン2動力を伝達ギヤ74と油圧変速機構57とに伝えて遊星ギヤ機構83により合成して出力させ、ミッションケース4で前後進切換とPTO変速を行い、後進、低速前進(圃場植付走行)、高速前進(路上移動走行)の各動作を行わせる。   Further, as shown in FIG. 20, when the pedal 31 is returned to the stop (zero speed) position by the spring 111 with the foot off the pedal 31, the sun gear 78 reverses clockwise at the maximum rotation and the planetary gear. At the same time, the carrier gear 79 is rotated by the transmission gear 74 to rotate the planetary gear 80 in the counterclockwise direction, and the planetary gear 80 is rotated in the clockwise direction to rotate counterclockwise. , And the composite output shaft 84 is stopped and maintained. When the pedal 31 is stepped on to the middle position (medium speed range) against the spring 111, the sun gear 78 stops, the carrier gear 79 is rotated by the transmission gear 74, and the planetary gear 80 is rotated clockwise. Then, the combined output shaft 84 is rotated by the gear power of the transmission gear 74. Further, when the pedal 31 is fully depressed, the sun gear 78 rotates in the counterclockwise direction at the maximum rotation, and the planetary gear 80 rotates in the clockwise direction while the carrier gear 79 is rotated in the clockwise direction while rotating in the clockwise direction. The combined output shaft 84 is rotated by adding the hydraulic transmission force from the sun gear 78 and the transmission gear 74 power, and the engine 2 power is transmitted to the transmission gear 74 and the hydraulic transmission mechanism 57 as shown in FIG. The planetary gear mechanism 83 synthesizes and outputs, and the mission case 4 performs forward / reverse switching and PTO speed change to perform reverse, low speed forward (farm planting travel), and high speed forward (road movement travel) operations.

そして、例えば、図22のように、油圧変速操作アーム109の角度を−1乃至0乃至1に変化させることにより、モータ軸77が−1000乃至0乃至1000回転になるようにし、図23のように、前記アーム109の角度に関係なくギヤ74側を1000回転させた場合、図24のように、前記アーム109の角度に対して合成出力軸84が0乃至2000回転になるように、ギヤ74・79及び遊星ギヤ機構83を組成する。   Then, for example, as shown in FIG. 22, the angle of the hydraulic speed change operation arm 109 is changed from −1 to 0 to 1, so that the motor shaft 77 becomes −1000 to 0 to 1000 rotations, and as shown in FIG. Further, when the gear 74 side is rotated 1000 times regardless of the angle of the arm 109, the gear 74 is set so that the combined output shaft 84 is 0 to 2000 rotations relative to the angle of the arm 109 as shown in FIG. -Composition 79 and planetary gear mechanism 83.

また、前記アーム109の全制御範囲を−1乃至0乃至1としたとき、図19に示す如く、前記アーム109の低速(ゼロ速度)側及び高速側の制御動作をボルト型低速及び高速ストッパ113・114によって規制し、図25のように、前記各ストッパ113・114によって調節自在な実際のアーム109の操作範囲を−0.8乃至0.6にして、0乃至1.4m/Sの作業速度を得ることにより、油圧変速機構57の組立誤差などによって生じる出力特性のバラツキに対して前記各ストッパ113・114により調整すると共に、例えば前記アーム109の−1乃至0.8の位置を調整域とし、速度をゼロにすることができ、仮りにアーム109が−1でも速度がゼロにならない不具合をなくしている。図26及び図27のように、一般的な作業速度において、油圧変速機構57とギヤ74側の動力分担比が60パーセント以上にし、油圧変速機構57の有効動力に対し、ギヤ74側の有効動力の割合を大きくし、湿田での走破性を向上させ、湿田での作業能率を向上させ、また耕盤の段差に対して余裕の脱出能力を持たせる。   Further, when the entire control range of the arm 109 is set to −1 to 0 to 1, as shown in FIG. 19, the control operation on the low speed (zero speed) side and high speed side of the arm 109 is changed to the bolt type low speed and high speed stopper 113.・ Controlled by 114, and as shown in FIG. 25, the operation range of the actual arm 109 adjustable by the stoppers 113 and 114 is set to −0.8 to 0.6, and the work of 0 to 1.4 m / S is performed. By obtaining the speed, adjustment is made by the stoppers 113 and 114 with respect to variations in output characteristics caused by assembly errors of the hydraulic transmission mechanism 57 and the position of the arm 109, for example, -1 to 0.8 is adjusted. Thus, the speed can be made zero, and the problem that the speed does not become zero even if the arm 109 is −1 is eliminated. As shown in FIGS. 26 and 27, at a general work speed, the power sharing ratio between the hydraulic transmission mechanism 57 and the gear 74 is set to 60% or more, and the effective power on the gear 74 side with respect to the effective power of the hydraulic transmission mechanism 57. Increase the ratio of the paddy field, improve the running performance in the wet field, improve the working efficiency in the wet field, and give the escape level enough for the step of the cultivator.

図15にも示す如く、前記遊星ギヤ機構83のキャリヤギヤ79に噛合せて該ギヤ79を駆動する伝達ギヤ74の一側を、前記ポンプ軸58のスプライン軸58aに取外し自在に嵌合させると共に、ギヤ74の他側にパイプ軸76を嵌合固定させて、油圧変速機構57と遊星ギヤ機構83との合成出力を形成する複合変速機構115を設けている。そして、油圧変速機構57の入力軸であるポンプ軸58及びパイプ軸76に遊星ギヤ機構83の駆動用ギヤである伝達ギヤ74を設けることによって、油圧変速機構57のポンプ軸58とは別個に遊星ギヤ機構83を駆動するための駆動ギヤ専用のギヤ軸を別個所に設置する構造の複雑さを解消させ、油圧変速機構57のポンプ軸58を利用した簡単な構成手段のもので、各駆動部に高い伝達効率の複合変速機構115の変速出力を有効に伝達させることができる。   As shown in FIG. 15, one side of the transmission gear 74 that meshes with the carrier gear 79 of the planetary gear mechanism 83 to drive the gear 79 is detachably fitted to the spline shaft 58a of the pump shaft 58, and A complex transmission mechanism 115 is provided on the other side of the gear 74 by fitting and fixing a pipe shaft 76 to form a combined output of the hydraulic transmission mechanism 57 and the planetary gear mechanism 83. Then, by providing the pump shaft 58 that is the input shaft of the hydraulic transmission mechanism 57 and the transmission gear 74 that is the driving gear of the planetary gear mechanism 83 on the pipe shaft 76, the planetary gear is separated from the pump shaft 58 of the hydraulic transmission mechanism 57. It eliminates the complexity of a structure in which a gear shaft dedicated to the drive gear for driving the gear mechanism 83 is installed at a separate location, and is a simple means using the pump shaft 58 of the hydraulic transmission mechanism 57. Therefore, it is possible to effectively transmit the shift output of the complex transmission mechanism 115 having a high transmission efficiency.

また、油圧変速機構57のポンプ軸58と、該ポンプ軸58と同一軸芯上に設ける油圧変速機構57など油圧機構に油圧を供給するポンプ75を駆動させるための駆動軸であるパイプ軸76とを利用して、強度且つ安定良好に伝達ギヤ74を支持可能とさせると共に、ポンプ75駆動部をコンパクトに配置することも可能とさせることがきる。   Also, a pump shaft 58 of the hydraulic transmission mechanism 57 and a pipe shaft 76 that is a drive shaft for driving a pump 75 that supplies hydraulic pressure to a hydraulic mechanism such as the hydraulic transmission mechanism 57 provided on the same axis as the pump shaft 58; By using this, it is possible to support the transmission gear 74 with high strength and stability, and it is possible to arrange the pump 75 drive unit in a compact manner.

また、油圧変速機構57の出力軸であるモータ軸77上に遊星ギヤ機構83を設けるもので、サンギヤ78の一側内面部をモータ軸77のスプライン軸77aに取外し自在に嵌合させると共に、一側外面部をベアリング116を介し前蓋部71に回転自在に支持させ、サンギヤ78の他側を合成出力軸84に軸受部材117を介して遊転支持させるように構成している。そして油圧変速機構57のモータ軸77とポンプ軸58の延長方向に遊星ギヤ機構83とこの駆動用ギヤ74を設けて、油圧変速機構57の形状を軸方向に若干延設させた大きさで複合変速機構115を横巾の狭い小型コンパクトなものに形成可能とさせるもので、油圧変速機構83のモータ軸77に遊星ギヤ機構83を設けることによって、ミッションケース4内に小型コンパクトに遊星ギヤ機構83を組込んで、ミッションケース4の小型軽量化を容易に可能とさせるように構成している。   Further, a planetary gear mechanism 83 is provided on a motor shaft 77 that is an output shaft of the hydraulic transmission mechanism 57. One side inner surface portion of the sun gear 78 is detachably fitted to the spline shaft 77a of the motor shaft 77, and The side outer surface portion is rotatably supported by the front lid portion 71 via a bearing 116, and the other side of the sun gear 78 is idled and supported by the composite output shaft 84 via a bearing member 117. A planetary gear mechanism 83 and a driving gear 74 are provided in the extension direction of the motor shaft 77 and the pump shaft 58 of the hydraulic transmission mechanism 57, and the shape of the hydraulic transmission mechanism 57 is slightly extended in the axial direction. The transmission mechanism 115 can be formed into a compact and compact one with a narrow width. By providing the planetary gear mechanism 83 on the motor shaft 77 of the hydraulic transmission mechanism 83, the planetary gear mechanism 83 is compactly and compactly provided in the transmission case 4. Is incorporated so that the mission case 4 can be easily reduced in size and weight.

また、前記サンギヤ78の一側をミッションケース4の前蓋部71に、他側を合成出力軸84に支持させると共に、サンギヤ78の外周面に遊転支持させるキャリヤギヤ79と出力軸84にスプライン84a嵌合させるリングギヤ82間にプラネタリギヤ80を配設して、遊星ギヤ機構83の軸方向の距離を短かして複合変速機構115の一層のコンパクト化を図るように構成している。   Further, one side of the sun gear 78 is supported by the front lid portion 71 of the transmission case 4 and the other side is supported by the composite output shaft 84, and the carrier gear 79 and the output shaft 84 are supported by the outer peripheral surface of the sun gear 78 and the spline 84a. A planetary gear 80 is arranged between the ring gears 82 to be fitted, and the planetary gear mechanism 83 is shortened in the axial direction so that the composite transmission mechanism 115 can be made more compact.

図6に示す如く、前車体カバー11a及び後車体カバー11bに分割形成する車体カバー11の前車体カバー11aの下側に油圧変速機構57を平面視でラップさせ、エンジン2やベルト61などのメンテナンス時に前車体カバー11aを取外すだけで、この変速機構57のメンテナンスも容易に可能とさせると共に、重量物の変速機構57をミッションケース4の前側位置に配置させて、機体の前後バランスを良好とさせるように構成している。   As shown in FIG. 6, a hydraulic transmission mechanism 57 is wrapped in a plan view below the front vehicle body cover 11a of the vehicle body cover 11 that is dividedly formed into the front vehicle body cover 11a and the rear vehicle body cover 11b, and maintenance of the engine 2 and the belt 61 is performed. Sometimes, the maintenance of the transmission mechanism 57 can be easily performed only by removing the front vehicle body cover 11a, and the heavy-duty transmission mechanism 57 is arranged at the front side position of the transmission case 4 to improve the front-rear balance of the aircraft. It is configured as follows.

図11、図12、図28乃至図30に示す如く、前記ミッションケース4は遊星ギヤ機構83を有する遊星ギヤ室118と、前後進ギヤ87・88やPTO変速機構102など有する変速ギヤ室119と、差動ギヤ90など有する差動ギヤ室120を内設するもので、各機能ごとに区画された3つのギヤ室118・119・120を有し、図29に示す如く平面視で遊星ギヤ室118の後側及び左側に変速ギヤ室119及び差動ギヤ室120を配設させ、遊星ギヤ機構83の左側に差動ギヤ90を近接配置させて、ミッションケース4の前後幅を短縮させて小型化するように構成している。   As shown in FIGS. 11, 12, and 28 to 30, the transmission case 4 includes a planetary gear chamber 118 having a planetary gear mechanism 83, a transmission gear chamber 119 having forward / reverse gears 87 and 88, a PTO transmission mechanism 102, and the like. A differential gear chamber 120 having a differential gear 90 and the like is provided, and has three gear chambers 118, 119, and 120 divided for each function, and a planetary gear chamber in a plan view as shown in FIG. The transmission gear chamber 119 and the differential gear chamber 120 are disposed on the rear side and the left side of the 118, and the differential gear 90 is disposed close to the left side of the planetary gear mechanism 83, so that the front-rear width of the transmission case 4 is shortened and reduced in size. It is configured to become.

また、前記差動ギヤ室120に接続固定する左フロントアクスルケース5の接続ケース121にサクション口122を設け、前記チャージポンプ75などに油圧ホース123を介しサクション口122を連通接続させて、ミッションケース4内に貯留する作動油をチャージポンプ75を介し油圧変速機構57などに供給するように構成している。   In addition, a suction port 122 is provided in a connection case 121 of the left front axle case 5 that is fixedly connected to the differential gear chamber 120, and the suction port 122 is connected to the charge pump 75 or the like via a hydraulic hose 123 so that a transmission case is provided. 4 is configured to supply hydraulic oil stored in 4 to the hydraulic transmission mechanism 57 and the like via a charge pump 75.

そして、前記遊星ギヤ室118に設ける油圧変速機構57の油圧戻り口124などより遠隔した位置にサクション口122を設けて、油の泡立ちなど有効に防止すると共に、遊星ギヤ室118と変速ギヤ室119及び変速ギヤ室119と差動ギヤ室120を仕切る仕切り壁部73・125に油の流通口126・127を適宜開設して、遊星ギヤ室118内に貯留される作動油を流通口126・127を介して変速ギヤ室119及び差動ギヤ室120に順次送り込んでサクション口122より吸出させて、油の泡立ちを一層防止しチャージポンプ75などに対する油圧の良好な供給を行うように構成している。   A suction port 122 is provided at a position remote from the hydraulic return port 124 of the hydraulic transmission mechanism 57 provided in the planetary gear chamber 118 to effectively prevent oil bubbles and the like, and the planetary gear chamber 118 and the transmission gear chamber 119. In addition, oil circulation ports 126 and 127 are appropriately opened in the partition wall portions 73 and 125 partitioning the transmission gear chamber 119 and the differential gear chamber 120, and the hydraulic oil stored in the planetary gear chamber 118 is supplied to the circulation ports 126 and 127. Are sequentially fed into the transmission gear chamber 119 and the differential gear chamber 120 and sucked out from the suction port 122 to further prevent the foaming of oil and to supply the hydraulic pressure to the charge pump 75 and the like in a satisfactory manner. .

なお、前記接続ケース121のサクション口122とは反対側位置に差動ギヤ90のデフロック機構128を入切操作するデフロックレバー129(前記デフロックペダル32に図示せぬ連動機構を介して連動)を設けると共に、前記ブレーキペダル30にブレーキレバー軸130及びブレーキレバー131を介し連結させる走行用ブレーキ132をフロント出力軸92に設けている。   A differential lock lever 129 (interlocked with the differential lock pedal 32 via an interlocking mechanism not shown) for turning on and off the differential lock mechanism 128 of the differential gear 90 is provided at a position opposite to the suction port 122 of the connection case 121. In addition, a traveling brake 132 is provided on the front output shaft 92 to be connected to the brake pedal 30 via a brake lever shaft 130 and a brake lever 131.

上記からも明らかなように、油圧変速機構75の変速出力をミッションケース4内で遊星ギヤ機構83、変速ギヤ機構である前後進ギヤ87・88、デフ機構である差動ギヤ90を介し車輪である前輪6の駆動を行う作業車において、前記遊星ギヤ機構83、前後進ギヤ87・88、差動ギヤ90をミッションケース4内の区画した区画室118・119・120に設けることによって、各機能別のギヤ87・88、90や機構83の配置を行って、構造のシンプル化や組立ての容易化を図ると共に、剛性を保った状態でミッションケース4の肉厚も薄くしてミッションケース4の軽量化も容易に可能にできる。   As is clear from the above, the transmission output of the hydraulic transmission mechanism 75 is transmitted to the wheels through the planetary gear mechanism 83 in the mission case 4, the forward / reverse gears 87 and 88 as the transmission gear mechanism, and the differential gear 90 as the differential mechanism. In a work vehicle for driving a certain front wheel 6, the planetary gear mechanism 83, the forward / reverse gears 87 and 88, and the differential gear 90 are provided in partitioned compartments 118, 119, and 120 in the mission case 4, thereby providing each function. Another gear 87, 88, 90 and mechanism 83 are arranged to simplify the structure and facilitate the assembly, and reduce the thickness of the mission case 4 while maintaining the rigidity. It is possible to easily reduce the weight.

また、ミッションケース4内に貯留させる作動油を各ギヤ機構室である遊星ギヤ室118、変速ギヤ室119、差動ギヤ室120を介してフロントアクスルケース5の油出口であるサクション口122に流通させて取出すことによって、区画された各ギヤ室118・119・120を順次流通させ、油の戻り口124からサクション口122を遠く離して、油の泡立ちを有効に防止して、油圧ポンプ85による良好な油の吸出などを容易に可能とさせて、油圧変速機構57の性能の安定保持を図ることができる。   Further, the hydraulic oil stored in the transmission case 4 is circulated to the suction port 122 which is the oil outlet of the front axle case 5 through the planetary gear chamber 118, the transmission gear chamber 119, and the differential gear chamber 120 which are each gear mechanism chamber. By removing the oil, the divided gear chambers 118, 119, and 120 are sequentially circulated, and the suction port 122 is moved away from the oil return port 124 to effectively prevent foaming of the oil. It is possible to easily perform good oil suction and the like, and the performance of the hydraulic transmission mechanism 57 can be stably maintained.

2 エンジン
3 車体フレーム
4 ミッションケース
5 フロントアクスルケース
6 前輪
7 リヤアクスルケース
8 後輪
43 前部フレーム
44 中間フレーム
45 後部フレーム
47 前フレーム
48 ベースフレーム
2 Engine 3 Body frame 4 Mission case 5 Front axle case 6 Front wheel 7 Rear axle case 8 Rear wheel 43 Front frame 44 Intermediate frame 45 Rear frame 47 Front frame 48 Base frame

Claims (3)

前後方向に沿って延びる左右一対の車体フレームと、前記一対の車体フレームに支持されたエンジンと、前記エンジンから回転動力を入力するミッションケースと、前記ミッションケースの左右の両側方に連結された左右一対のフロントアクスルケースと、前記左右一対のフロントアクスルケースに支持された左右一対の前輪と、前記ミッションケースから後方に離間配置されたリヤアクスルケースと、前記リヤアクスルケースに支持された左右一対の後輪とを備え、
前記ミッションケースと前記左右一対のフロントアクスルケースと前記左右一対の前輪とがフロントアクスルアッセンブリを形成し、
前記リヤアクスルケースと前記左右一対の後輪とがリヤアクスルアッセンブリを形成し、
前記左右一対の車体フレームは、車体前後方向中間に位置し且つ前記一対のフロントアクスルケースに連結された左右一対の中間フレームと、後端部が前記左右一対の中間フレームのそれぞれに着脱自在に連結された左右一対の前部フレームと、前端部が前記左右一対の中間フレームのそれぞれに着脱自在に連結され且つ後端部が前記リヤアクスルアッセンブリに間接的に着脱自在に連結された左右一対の後部フレームとを有していることを特徴とする作業車。
A pair of left and right body frames extending along the front-rear direction, an engine supported by the pair of body frames, a transmission case for inputting rotational power from the engine, and a left and right connected to the left and right sides of the transmission case A pair of front axle cases, a pair of left and right front wheels supported by the pair of left and right front axle cases, a rear axle case spaced rearward from the transmission case, and a pair of left and right rear wheels supported by the rear axle case And
Said transmission case and said pair of left and right front axle case and the pair of left and right front wheels form a front axle assembly,
The rear axle case and the pair of left and right rear wheels form a rear axle assembly,
The pair of left and right body frames are located in the middle of the vehicle longitudinal direction and are detachably connected to the pair of left and right intermediate frames connected to the pair of front axle cases and the rear end portions of the pair of left and right intermediate frames. has been left and a pair of front frame, the front end respectively to detachably linked and rear end the rear axle assembly indirectly detachably connected between the the pair of right and left rear portion of the pair of left and right intermediate frame A work vehicle comprising a frame.
前記一対の前部フレームは、車体前後方向前側において車体幅方向に延びる前フレームを介して互いに対して連結され且つ前記前フレームより車体前後方向後方側において車体幅方向に延びるベースフレームを介して互いに対して連結されることで、平面視四角状の枠体を形成していることを特徴とする請求項1に記載の作業車。   The pair of front frames are connected to each other via a front frame extending in the vehicle body width direction on the front side in the vehicle longitudinal direction, and are mutually connected via a base frame extending in the vehicle width direction on the rear side in the vehicle longitudinal direction from the front frame. The work vehicle according to claim 1, wherein the work vehicle is connected to form a rectangular frame in plan view. 前記エンジンは、前記枠体に支持されていることを特徴とする請求項2に記載の作業車。   The work vehicle according to claim 2, wherein the engine is supported by the frame body.
JP2014059426A 2014-03-24 2014-03-24 Work vehicle Expired - Lifetime JP5804612B2 (en)

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JPH11127625A (en) * 1997-10-28 1999-05-18 Mitsubishi Agricult Mach Co Ltd Traveling vehicle for working use
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