JP4183809B2 - Mobile farm machine - Google Patents
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- JP4183809B2 JP4183809B2 JP29618098A JP29618098A JP4183809B2 JP 4183809 B2 JP4183809 B2 JP 4183809B2 JP 29618098 A JP29618098 A JP 29618098A JP 29618098 A JP29618098 A JP 29618098A JP 4183809 B2 JP4183809 B2 JP 4183809B2
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Description
【0001】
【発明の属する技術分野】
本発明は例えば圃場の穀稈を連続的に刈取って脱穀するコンバインなどの移動農機に関する。
【0002】
【従来の技術】
従来、左右走行クローラを装設したコンバインで圃場の未刈り穀稈列に沿わせて走行移動させ乍ら収穫作業を行うと共に、圃場枕地で前記コンバインを方向転換させて次工程の未刈り穀稈列に移動させていたが、エンジン出力を変速伝達するミッションケースの左右走行出力を左右サイドクラッチを介して左右走行クローラに伝達させ、左右サイドクラッチの継断操作により左右走行クローラの一方を一時的に停止させて旋回させることにより、左右サイドクラッチ操作と走行変速操作の両方を作業者が略同時期に行う必要があり、また圃場枕地で方向転換するときの旋回半径が大きくなる不具合があった。そこでエンジンの動力を各別に伝える左右油圧無段変速機を設けて左右走行クローラを駆動することにより、旋回時の減速並びに旋回半径の縮少などを容易に行えるが、直進性能が低下し易く、未刈り穀稈列に沿わせて走行移動させる操向操作が面倒になる不具合があった。また左右走行クローラにエンジン動力を変速伝達する単一の油圧無段変速機構と、旋回内側の走行クローラを減速しかつ旋回外側の走行クローラを増速させる油圧無段操向機構を設けることにより、直進性能を良好に維持でき、かつ旋回半径も容易に縮少できるが、走行速度を高速にすることによって旋回半径が大きくなったり、走行速度を低速にすることによって旋回半径が小さくなる不具合があり、例えば四輪自動車のように走行速度に関係なく旋回半径を略一定に保つ操舵感覚を得るには、走行変速操作時、走行速度の変化に応じて作業者が操舵操作量を感覚的に変更させる必要があり、直進走行によって行う農作業時に蛇行走行させて未刈り穀稈列または未耕地または作物畦から離れ易くなる等の取扱い上の問題がある。特に、丸形の操向ハンドルを設ける場合、左右サイドクラッチ及び左右サイドクラッチレバーを設ける操舵構造に比べて、走行速度を一定維持した状態で操舵性を向上させることができるが、走行変速によって蛇行し易く、四輪自動車の運転感覚での操舵を容易に行い得ず、走行変速操作及び操向操作など運転操作性の向上並びに操縦機能の向上などを容易に図り得ない等の問題があった。そこで当出願人はエンジンの駆動力を左右走行クローラに伝える差動機構と、左右走行クローラの駆動速度を無段階に変更させる変速部材と、左右走行クローラの駆動速度の差を無段階に変化させる操向部材を設ける移動農機において、操向操作具によって回転させる操向入力軸と、変速操作具によって回転させる変速入力軸と、変速入力軸を変速部材に連結させる変速機構と、操向入力軸を操向部材に連結させる操向機構を設け、変速機構動作量に比例させて操向機構操向量を変化させるように構成し、高速側走行変速によって操向量を自動的に拡大し、かつ低速側走行変速によって操向量を自動的に縮少し、操向操作具の一定量の操作によって走行速度に関係なく左右走行クローラの旋回半径を略一定に維持し、農作業走行速度の変更並びに作物列などに機体を沿わせる進路修正などを容易に行う技術を開発した。
【0003】
【発明が解決しようとする課題】
上記の技術は、要するに、運転席前方のステアリングコラムに旋回用HSTへの操向操作出力部と共に運転席側方のサイドコラムからの主変速操作入力部及び直進用HSTへの主変速操作出力部を設け、主変速操作を直接直進用HSTに伝えるのではなく、一旦ステアリングコラムに入力して直進用HSTに伝えるようにし、ステアリングコラムの内部機構によって入力された主変速操作量に比例させて操向操作量を変化させ、その操向操作を旋回用HSTに伝えるのであるが、サイドコラムからの主変速操作をステアリングコラムに伝える主変速操作伝達部材と、ステアリングコラムからの主変速操作及び操向操作を直進用HST及び旋回用HSTに伝える主変速操作伝達部材及び操向操作伝達部材等、比較的長い操作伝達部材が必要となり、これらの操作伝達部材を用いて適正に主変速操作及び操向操作を伝達できないと所望の機能を得られない。
【0004】
従って、本発明は、サイドコラムからステアリングコラムへの主変速操作とステアリングコラムから直進用HST及び旋回用HSTへの主変速操作及び操向操作を適正に伝えることができる移動農機を提供することを目的としている。
【0005】
【課題を解決するための手段】
上記目的を達成するための本発明の移動農機は、運転席前方の丸ハンドル式のステアリングコラムに旋回用HSTへの操向操作出力部と共に運転席側方のサイドコラムからの主変速操作入力部及び直進用HSTへの主変速操作出力部を設けた移動農機において、前記各HSTを搭載するミッションを前記サイドコラムの下方に配設し、機体左右方向に主変速操作伝達経路を形成する主変速操作横伝達部材と機体前後方向に主変速操作伝達経路を形成する長さ調節自在な主変速操作縦伝達部材を設け、サイドコラムから主変速操作横伝達部材及び主変速操作縦伝達部材を介してサイドコラムの運転席側外側で主変速操作をステアリングコラムの主変速操作入力部に伝達する。これによってステアリングコラムとサイドコラムと旋回用HST及び直進用HSTを搭載するミッションの三者を従来に比べ接近配置し、主変速操作及び操向操作の伝達距離の短縮を図り、これら操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。また主変速操作及び操向操作の伝達部材やその他サイドコラム内部機構に対する泥及び塵埃の付着をミッション及びミッション部の防塵カバーなどで防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らす。また主変速操作をその操作方向と同方向でサイドコラムからステアリングコラムに伝達し、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラムからステアリングコラムへの主変速操作伝達系のメンテナンスを運転席側から簡単に行え、これを常に適正状態に保ち、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。
【0006】
また、ミッションへのHST取付座にサイドコラムの支持フレームを連結すると共に、主変速操作横伝達部材の入力側端部を前記HST取付座に支持させ、主変速操作横伝達部材の出力側端部をシャーシフレームに支持させる。これによって主変速の操作部と被操作部を一体の構造物で支持し、またサイドコラムからステアリングコラムへの主変速操作系の支点部となる主変速操作横伝達部材も主変速の操作部と被操作部を支持する一体の構造物で支持し、主変速操作系の支持剛性を高め、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラムはステアリングコラムを支持しているシャーシフレームにも連結することによって、ステアリングコラムとサイドコラムと旋回用HST及び直進用HSTを搭載するミッションの三者が一体的に支持され、主変速操作系及び操向操作系両方の支持剛性を高め、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0007】
また、ステアリングコラムの操向操作出力部と旋回用HSTとの間の操向操作伝達経路を形成する長さ調節自在な操向操作伝達部材とステアリングコラムの主変速操作出力部と直進用HSTとの間の主変速操作伝達経路を形成する長さ調節自在な主変速操作伝達部材とを設け、運転席前方下方に張設する着脱自在なステップ板の下面側に主変速操作縦伝達部材及び操向操作伝達部材及び主変速操作伝達部材を配設し、且つ各伝達部材の長さ調節部を前記ステップ板の下面側に設ける。これによってサイドコラムからステアリングコラムへの主変速操作伝達部材とステアリングコラムから旋回用HST及び直進用HSTへの操向操作伝達部材及び主変速操作伝達部材の長さ調節を簡単に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0008】
また、サイドコラムの運転席側側壁を開閉自在に形成する。これによってミッション上側の旋回用HST及び直進用HSTの操向操作入力部及び主変速操作入力部及び主変速操作部及びその他サイドコラム内部機構などのメンテナンスが運転席側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。またステアリングコラムから旋回用HST及び直進用HSTへの操向操作伝達部材及び主変速操作伝達部材の長さ調節を、旋回用HST及び直進用HSTの操向操作入力部及び主変速操作入力部の状態を目視確認しながら適正に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0009】
本願明細書中の「HST」と言う用語は、油圧駆動装置(hydro−static transmission)を意味し、これは油圧を用いて動力伝達を行うもので、まず油圧ポンプを機関で駆動し、発生した圧力油を油圧モータに導き、動力を伝達する構造になっている。また速度の調節は、斜板とプランジャによる可変容量形ポンプを用いて油量を変化させることにより行う。
【0010】
【発明の実施の形態】
以下、本発明の実施例を図面に基づいて詳述する。図1はコンバインの全体側面図、図2は同平面図であり、図中(1)は左右一対の走行クローラ(2)を装設するトラックフレーム、(3)は前記トラックフレーム(1)に架設するシャーシフレーム、(4)はフィードチェン(5)を左側に張架し扱胴(6)及び処理胴(7)を内蔵している脱穀部、(8)は刈刃(9)及び穀稈搬送機構(10)などを備える刈取部、(11)は刈取フレーム(12)を介して刈取部(8)を昇降させる油圧シリンダ、(13)は排藁チェン(14)終端を臨ませる排藁処理部、(15)は脱穀部(4)からの穀粒を揚穀筒(16)を介して搬入する穀物タンク、(17)は前記タンク(15)の穀粒を機外に搬出する排出オーガ、(18)は丸形の操向ハンドル(19)及び運転席(20)などを備える運転操作部、(21)は運転席(20)下方に設けるエンジンであり、連続的に穀稈を刈取って脱穀するように構成している。
【0011】
さらに、図3に示す如く、前記走行クローラ(2)を駆動するミッション(22)は、1対の第1油圧ポンプ(23)及び第1油圧モータ(24)を備えて走行主変速用の油圧式無段変速機構を形成する直進用HST(25)と、1対の第2油圧ポンプ(26)及び第2油圧モータ(27)を備えて旋回用の油圧式無段変速機構を形成する旋回用HST(28)とを備え、前記エンジン(21)の出力軸(21a)に第1及び第2油圧ポンプ(23)(26)の入力軸(29a)(29b)を伝達ベルト(30a)(30b)によって連結させ、前記各油圧ポンプ(23)(26)を駆動するように構成している。
【0012】
また、前記第1油圧モータ(24)の出力軸(31)に、副変速機構(32)及び差動機構(33)を介して左右走行クローラ(2)の各駆動輪(34)を連動連結させるもので、前記差動機構(33)は左右対称の1対の遊星ギヤ機構(35)(35)を有し、各遊星ギヤ機構(35)は1つのサンギヤ(36)と、該サンギヤ(36)の外周で噛合う3つのプラネタリギヤ(37)と、これらプラネタリギヤ(37)に噛合うリングギヤ(38)などで形成している。
【0013】
前記プラネタリギヤ(37)はサンギヤ軸(39)と同軸線上とのキャリヤ軸(40)のキャリヤ(41)にそれぞれ回転自在に軸支させ、左右のサンギヤ(36)(36)を挾んで左右のキャリヤ(41)を対向配置させると共に、前記リングギヤ(38)は各プラネタリギヤ(37)に噛み合う内歯(38a)を有してサンギヤ軸(39)とは同一軸芯上に配置させ、キャリヤ軸(40)に回転自在に軸支させ、キャリヤ軸(40)を延設して車軸を形成して駆動輪(34)を軸支させている。
【0014】
また、直進用HST(25)は、第1油圧ポンプ(23)の回転斜板の角度変更調節により第1油圧モータ(24)の正逆回転と回転数の制御を行うもので、第1油圧モータ(24)の回転出力を出力軸(31)の伝達ギヤ(42)より各ギヤ(43)(44)(45)及び副変速機構(32)を介して、サンギヤ軸(39)に固定したセンタギヤ(46)に伝達してサンギヤ(36)を回転するように構成している。前記副変速機構(32)は、前記ギヤ(44)を有する副変速軸(47)と、前記ギヤ(45)を介してセンタギヤ(46)に噛合うギヤ(48)を有する駐車ブレーキ軸(49)とを備え、副変速軸(47)とブレーキ軸(49)間に各1対の低速用ギヤ(50)(51)・中速用ギヤ(52)(53)・高速用ギヤ(54)(48)を設けて、低中速スライダ(55)及び高速スライダ(56)のスライド操作によって副変速の低速・中速・高速の切換を行うように構成している。なお低速・中速間及び中速・高速間には中立を有する。また前記ブレーキ軸(49)に駐車ブレーキ(57)を設けると共に、刈取部(8)に回転力を伝達する刈取PTO軸(58)にギヤ(59)(60)及び一方向クラッチ(61)を介して副変速軸(47)を連結させ、刈取部(8)を車速同調速度で駆動している。
【0015】
上記のように、前記センタギヤ(46)を介しサンギヤ軸(39)に伝達された第1油圧モータ(24)からの駆動力を、左右の遊星ギヤ機構(35)を介して左右キャリヤ軸(40)に伝達させると共に、左右キャリヤ軸(40)に伝達された回転を左右の駆動輪(34)にそれぞれ伝え、左右走行クローラ(2)を駆動するように構成している。
【0016】
さらに、旋回用HST(28)は、第2油圧ポンプ(26)の回転斜板の角度変更調節により第2油圧モータ(27)の正逆回転と回転数の制御を行うもので、操向出力ブレーキ(62)を有するブレーキ軸(63)と、操向出力クラッチ(64)を有するクラッチ軸(65)と、前記の左右リングギヤ(38)の外歯(38b)に常時噛合させる左右入力ギヤ(66)(67)を設け、第2油圧モータ(27)の出力軸(68)に前記ブレーキ軸(63)及び操向出力クラッチ(64)を介してクラッチ軸(65)を連結させ、クラッチ軸(65)に正転ギヤ(69)を介して右入力ギヤ(67)を連結させ、またクラッチ軸(65)に正転ギヤ(69)及び逆転ギヤ(70)を介して左入力ギヤ(66)を連結させている。そして、副変速スライダ(55)(56)の中立によって前記ブレーキ(62)を入にしかつクラッチ(64)を切にする一方、前記中立以外の副変速出力時にブレーキ(62)を切にしかつクラッチ(64)を入にし、右側のリングギヤ(38)の外歯(38b)に正転ギヤ(69)を介してモータ(27)回転力を伝え、また左側のリングギヤ(38)の外歯(38b)に正転ギヤ(69)及び逆転ギヤ(70)を介してモータ(27)回転を伝え、第2油圧モータ(27)を正転(逆転)時、左右同一回転数で、左リングギヤ(38)を逆転(正転)させ、かつ右リングギヤ(38)を正転(逆転)とさせるように構成している。
【0017】
而して、旋回用の第2油圧モータ(27)を停止させて左右リングギヤ(38)を静止固定させた状態で、直進用の第1油圧モータ(24)を駆動すると、第1油圧モータ(24)からの回転出力はセンタギヤ(46)から左右のサンギヤ(36)に同一回転数で伝達され、左右遊星ギヤ機構(35)のプラネタリギヤ(37)・キャリヤ(41)を介して左右の走行クローラ(2)が左右同一回転方向で同一回転数によって駆動され、機体の前後方向直進走行が行われる。一方、直進用の第1油圧モータ(24)を停止させて左右のサンギヤ(36)を静止固定させた状態で、旋回用の第2油圧モータ(27)を正逆回転駆動すると、左側の遊星ギヤ機構(35)が正或いは逆回転、また右側の遊星ギヤ機構(35)が逆或いは正回転し、左右走行クローラ(2)を逆方向に駆動し、機体を左或いは右に旋回させる。また、直進用の第1油圧モータ(24)を駆動させながら、旋回用の第2油圧モータ(27)を駆動することにより、機体が左右に旋回して進路が修正されるもので、機体の旋回半径は第2油圧モータ(27)の出力回転数によって決定される。
【0018】
さらに、図2、図4乃至図13に示す如く、前記運転操作部(18)の前部上面にステアリングコラム(71)を立設固定させ、ステアリングコラム(71)上面上方側に操向ハンドル(19)を縦軸回りに回転自在に設けると共に、運転操作部(18)左側にサイドコラム(72)を設け、サイドコラム(72)下方にミッション(22)を配設させ、主変速レバー(73)、副変速レバー(74)、刈取クラッチレバー(75)、脱穀クラッチレバー(76)などを前記サイドコラム(72)に設ける。また前記ステアリングコラム(71)は、アルミニウム合金鋳物を成形加工して形成し、左右に分割自在な2つ割れ構造で複数のボルト(77)で締結して箱形に形成している。
【0019】
また、前記ステアリングコラム(71)上部にチルト台(78)を一体形成し、チルト台(78)に支点ボルト(79)を介してチルトブラケット(80)を回転自在に軸支させ、チルトレバー(81)によってチルトブラケット(80)を角度調節自在に固定させる。前記チルトブラケット(80)に軸ケース(82)下部を一体固定させ、コラム(71)上面に固定させる上面カバー(83)上方に軸ケース(82)を延設させ、軸ケース(82)内部に上ハンドル軸(84)を回転自在に軸支させ、上ハンドル軸(84)上端に操向ハンドル(19)を固定させ、チルトレバー(81)操作により支点ボルト(79)回りにハンドル(19)を前後方向に移動調節して一定位置に支持させ、ハンドル(19)取付け位置を前後方向に調節して作業者が操作し易い位置に固定させる。
【0020】
また、前記上ハンドル軸(84)の下端部に自在継手(85)を介して下ハンドル軸(86)上端側を連結させ、下ハンドル軸(86)をステアリングコラム(71)上部に回転自在に軸支させると共に、ステアリングコラム(71)上部に操向入力軸(87)上端部を回転自在に軸支させ、下ハンドル軸(86)のギヤ(88)と操向入力軸(87)のセクタギヤ(89)を噛合させて各軸(86)(87)を連結させ、ステアリングコラム(71)内部の略中央で上下方向に操向入力軸(87)を延設させる。
【0021】
さらに、前記ステアリングコラム(71)の左側面で上下幅略中間に軸受部(90)を一体形成し、変速入力軸(91)の一端部を軸受部(90)にボルト(92)を介して回転自在に片持ち支持させ、変速入力軸(91)を左右方向に略水平に軸支させると共に、操向入力軸(87)下端に自在継手(93)を介して入力支点軸(94)上端側を連結させ、入力支点軸(94)下端側を前記変速入力軸(91)に回転自在に軸支させる。また前記入力支点軸(94)上端側に操向入力部材(95)を固定させ、変速入力軸(91)上面と操向入力部材(95)下面の間に変速入力部材(96)を挾持させ、入力支点軸(94)回りに変速入力部材(96)を回転自在に取付けると共に、変速入力部材(96)に着脱自在に固定させる連係ボルト(97)によって前記各入力部材(95)(96)を連結させ、また変速入力軸(91)に設ける挾みバネ(98)の両端を変速入力部材(96)に係止させ、変速入力部材(96)を前記バネ(98)によって直進中立位置に支持させる。また、前記操向入力軸(87)の正逆転によって前記各入力部材(95)(96)をバネ(98)に抗して略垂直な入力軸(87)芯線回りに正逆転させると共に、前記変速入力軸(91)の正逆転によって略水平な左右方向の入力軸(91)芯線回りに入力支点軸(94)及び前記各入力部材(95)(96)を前後方向に傾動させるもので、垂直方向の操向入力軸(87)芯線と左右水平方向の変速入力軸(91)芯線とが直角交叉する交点に自在継手(93)を取付け、操向ハンドル(19)の操向入力軸(87)正逆転操作により操向入力軸(87)芯線回りに前記各入力部材(95)(96)を正逆転させる。
【0022】
さらに、前記ステアリングコラム(71)の下部前側にサイドコラム(72)からの主変速操作入力部である主変速軸(99)を回転自在に軸支させ、左右方向に略水平に横架させる主変速軸(99)の左側端をステアリングコラム(71)の左側外方に突設させると共に、サイドコラム(72)下方に設ける主変速操作横伝達部材である中介軸(100)に、リンク(101)(102)並びに長さ調節自在な主変速操作縦伝達部材である長さ調節ターンバックル(103)付きロッド(104)を介して主変速軸(99)を連結させる。また、サイドコラム(72)内部のレバー支点軸(105)に回転自在に支点板(106)を取付け、支点板(106)に筒軸(107)を介して主変速レバー(73)基部を左右方向に揺動自在に取付けると共に、支点板(106)にリンク(108)(109)を介して中介軸(100)を連結させ、主変速レバー(73)をレバー支点軸(105)回りに前後方向に揺動させる変速操作によって主変速軸(99)を正逆転させる。また、ロッド形主変速部材(110)及び上下リンク(111)(112)を介して変速入力軸(91)に主変速軸(99)を連結させ、主変速レバー(73)の主変速軸(99)正逆転操作により前記各入力部材(95)(96)を変速入力軸(91)芯線回りに前後に傾動させる。
【0023】
さらに、筒軸形の操向出力軸(113)を前記主変速軸(99)に回転自在に取付け、リンク形操向出力部材(114)を操向出力軸(113)に固定させると共に、ロッド形操向結合部材(115)の上端部を前記操向入力部材(95)に自在継手形操向入力連結部(116)を介して連結させ、球関継手形操向出力連結部(117)を介して操向結合部材(115)の下端部を操向出力部材(114)に連結させ、走行進路を変更させる操向機構(118)を構成している。
【0024】
さらに、前記操向出力軸(113)の上方で該軸(113)と略平行に変速出力軸(119)をステアリングコラム(71)内部に回転自在に軸支させ、リンク形変速出力部材(120)を変速出力軸(119)に固定させると共に、ロッド形変速結合部材(121)の上端部を前記変速入力部材(96)に自在継手形変速入力連結部(122)を介して連結させ、球関継手形変速出力連結部(123)を介して変速結合部材(121)の下端部を変速出力部材(120)に連結させ、走行速度の変更並びに前後進の切換を行う変速機構(124)を構成している。
【0025】
さらに、互に回転自在な二重軸構造の内側の変速操作軸(125)並びに外側の操向操作軸(126)をステアリングコラム(71)の下部後側で左右幅中央の軸受部(127)に回転自在に取付けるもので、長さ調節自在な球関継手軸(128)及び変速リンク(129)(130)を介して前記変速出力軸(119)に変速操作軸(125)上端部を連結させると共に、長さ調節自在な球関継手軸(131)及び操向リンク(132)(133)を介して前記操向出力軸(113)に操向操作軸(126)上端部を連結させる。
【0026】
また、前記各操作軸(125)(126)は同一軸芯上に略垂直にステアリングコラム(71)底部に立設させ、各操作軸(125)(126)上端部をステアリングコラム(71)内部に延設させて各出力軸(113)(119)に連結させると共に、ステアリングコラム(71)底面下方に各操作軸(125)(126)下端部を突設させ、前記運転台(18)の作業者搭乗用のステップ板(134)下面側に各操作軸(125)(126)下端側を延設させるもので、前記直進用HST(25)の主変速操作入力部である第1トラニオン(135)にトラニオンアーム(136)を固定させ、ステアリングコラム(71)と直進用HST(25)との間の長さ調節自在な主変速操作伝達部材であるターンバックル(137)付き長さ調節自在ロッド(138)及びリンク(139)を介してステアリングコラム(71)の主変速操作出力部である前記変速操作軸(125)下端部にトラニオンアーム(136)を連結させ、第1トラニオン(135)の正逆転操作により第1油圧ポンプ(23)の斜板角調節を行って第1油圧モータ(24)の回転数制御及び正逆転切換を行い、走行速度(車速)の無段階変更並びに前後進の切換を行う。また前記旋回用HST(28)の操向操作入力部である第2トラニオン(140)にトラニオンアーム(141)を固定させ、ステアリングコラム(71)と旋回用HST(28)との間の長さ調節自在な操向操作伝達部材であるターンバックル(142)付き長さ調節自在ロッド(143)及びリンク(144)を介してステアリングコラム(71)の操向操作出力部である操向操作軸(126)下端部にトラニオンアーム(141)を連結させ、第2トラニオン(140)の正逆転操作により第2油圧ポンプ(26)の斜板角調節を行って第2油圧モータ(27)の回転数制御及び正逆転切換を行い、操向角度(旋回半径)の無段階変更並びに左右旋回方向の切替を行う。
【0027】
さらに、前記ステアリングコラム(71)の右側外面にアクセルレバー(145)を前後方向回転自在に設け、エンジン(21)にアクセルレバー(145)を連結させるアクセルワイヤ(146)をステアリングコラム(71)前面内側に沿わせて下方から延出させ、アクセルレバー(145)によってエンジン(21)回転数を手動調節すると共に、前記ステアリングコラム(71)後面にメンテナンス窓(147)を開設させ、着脱自在な蓋(148)によってメンテナンス窓(147)を閉鎖している。
【0028】
さらに、図14、図15に示す如く、前記連係ボルト(97)を遊嵌挿通させる位相調節孔(149)を操向入力部材(95)に開設させると共に、操向入力軸(87)芯線を中心とする同一放射線上に複数(3個)のネジ孔(150)を設け、前記放射線を中心に操向入力軸(87)側を底辺とする台形に前記位相調節孔(149)を形成するもので、直進位置の操向ハンドル(19)を左右回転操作したとき、前記ネジ孔(150)に固定させた連係ボルト(97)が位相調節孔(149)縁に当接するまで、変速入力部材(96)を挾みバネ(98)によって一定位置に固定させた状態で、操向入力部材(95)だけを回転させ、走行速度を略一定に保ち乍ら左右に旋回させて進路を修正する。そして、連係ボルト(97)が位相調節孔(149)縁に当接したとき、操向ハンドル(19)をさらに同一方向に回転操作することにより、連係ボルト(97)の連結によって操向入力部材(95)と変速入力部材(96)の両方がバネ(98)に抗して回転し、走行速度を減速させ乍ら進路修正を行うもので、操向ハンドル(19)操作によって決定される旋回半径と走行速度の減速量が比例して変化すると共に、操向ハンドル(19)を直進位置に戻すことにより、挾みバネ(98)によって変速入力部材(96)が中立位置に戻され、元の走行速度に自動的に復帰する。また、連係ボルト(97)を各ネジ孔(150)に付け換えることにより、位相調節孔(149)縁に連係ボルト(97)が当接するまでの操向入力部材(95)の回転角度が変化し、操向ハンドル(19)操作による走行速度の減速開始時期を調整できると共に、操向ハンドル(19)を直進支持しているとき、挾みバネ(98)によって変速入力部材(96)が変速入力軸(91)に固定され、機械振動などによって変速入力部材(96)が遊動するのを防ぎ、変速入力部材(96)のふらつきによって走行速度が減速変化するのを阻止している。
【0029】
さらに、図16乃至図20に示す如く、前記ギヤ(88)は、270度の外周範囲に複数の歯(151)を形成し、90度の外周範囲を円弧(152)に形成し、操向ハンドル(19)の全回転角度を270度とし、左操向回転または右操向回転の角度を135度に設定し、操向ハンドル(19)回転操作を片手で作業者が容易に行えるように形成する。また、前記セクタギヤ(89)は、130度の外周範囲に複数の歯(153)を形成し、230度の外周範囲を円弧カム(154)に形成し、前記ギヤ(88)の歯(151)とセクタギヤ(89)の歯(153)を噛合せ、各ギヤ(88)(89)の最大正逆転時、前記円弧(152)両端のストッパ(155)と前記円弧カム(154)両端のストッパ(156)を当接させ、操向ハンドル(19)の回転を規制すると共に、操向入力軸(87)芯線回りに操向入力部材(95)及び変速入力部材(96)を65度の範囲で正転または逆転させ、各入力部材(95)が回転移動する平面上に変速入力軸(91)及び主変速部材(110)上端部を配置させる空間を確保し、変速入力軸(91)芯線上に操向入力連結部(116)を設ける構造、並びに同一円周上で前記各入力連結部(116)(122)を90度離間させる構造を容易に得られ、構造のコンパクト化、設計組立の簡略化などを図れるように構成している。
【0030】
また、前記セクタギヤ(89)の円弧カム(154)中央に直進ノッチ(157)を形成すると共に、前記ステアリングコラム(71)上面壁にデテント軸(158)を回転自在に軸支させ、デテント軸(158)下端部にデテントアーム(159)を固定させ、デテントアーム(159)にローラ軸(160)を介してデテントローラ(161)を回転自在に軸支させ、前記円弧カム(154)にデテントローラ(161)を当接させ、直進ノッチ(157)に係脱自在にデテントローラ(161)を係合させ、操向ハンドル(19)を直進位置に支持させる。また、前記デテント軸(158)上端側にデテントレバー(162)を固定させ、デテント軸(158)に巻装させる中立バネ(163)の一端をデテントレバー(162)に係止させ、ステアリングコラム(71)の受板(164)に中立バネ(163)の他端を当接させ、円弧カム(154)及び直進ノッチ(157)にデテントローラ(161)を中立バネ(163)によって弾圧当接させている。また、操向ハンドル(19)の直進位置をオンオフ切換によって電気的に検出するマイクロスイッチ型直進センサ(165)をデテントレバー(162)に取付けている。
【0031】
そして、前記主変速レバー(73)が中立のとき、操向ハンドル(19)の正転(逆転)操作により、操向入力軸(87)芯線回りに前記各入力部材(95)(96)及び各結合部材(115)(121)が円錐軌跡上で移動し、前記各出力部材(114)(120)及び各出力軸(113)(119)が停止した状態が維持される。
【0032】
また、主変速レバー(73)を前方(後方)に倒す前進(後進)操作により、前記各入力部材(95)(96)が変速入力軸(91)芯線回りに前方(後方)に傾き、操向入力連結部(116)が一定位置に停止した状態を維持し乍ら、変速入力連結部(122)を上方(下方)に移動させ、変速出力部材(120)の上方(下方)揺動によって変速出力軸(119)を正転(逆転)させ、直進用HST(25)の第1油圧ポンプ(23)の斜板角切換によって第1油圧モータ(24)を正転(逆転)させ、第1油圧モータ(24)の出力軸(31)の正転(逆転)によって左右走行クローラ(2)を前進(後進)駆動する。また、主変速レバー(73)の倒し角に比例して出力軸(31)の回転数が変化し、走行クローラ(2)の前進(後進)速度が無段階に変速される。
【0033】
さらに、主変速レバー(73)を前方(後方)に倒して前進(後進)操作を行っている状態下で、操向ハンドル(19)を左方向(右方向)に回転させることにより、変速入力軸(91)芯線回りに操向入力部材(95)が前方(後方)に傾いた姿勢で操向入力軸(87)芯線回りに正転(逆転)し、操向入力連結部(116)が下方(上方)に移動し、操向出力部材(114)の下方(上方)揺動によって操向出力軸(113)を正転(逆転)させ、旋回用HST(28)の第2油圧ポンプ(26)の斜板角切換によって第2油圧モータ(27)を正転(逆転)させ、第2油圧モータ(27)の出力軸(68)の正転(逆転)により、左走行クローラ(2)を減速(増速)させ、かつ右走行クローラ(2)を増速(減速)させ、左方向(右方向)に機体を旋回させて左方向(右方向)に進路を修正する。また、前記の進路修正動作と同時に、操向ハンドル(19)の左方向(右方向)回転により、変速入力軸(91)芯線回りに変速入力部材(96)が前方(後方)に傾いた状態で操向入力軸(87)芯線回りに正転(逆転)し、変速入力連結部(122)が下方(上方)に移動し、変速出力部材(120)の下方(上方)揺動によって変速出力軸(119)を逆転(正転)させ、直進用HST(25)を中立方向に戻す制御を行って出力軸(31)の回転数を低下させ、走行速度(車速)を減速させる。このように、走行移動中の操向ハンドル(19)の左右操向操作により、操向ハンドル(19)の回転角度に比例して、進路を修正する旋回半径(角度)と、走行速度の減速量が変化し、操向ハンドル(19)を大きく回転させることによって左右走行クローラ(2)の速度差を大きくして旋回半径を小さくすると同時に、走行速度の減速量が多くなって車速が遅くなると共に、前進時と後進時とでは、操向ハンドル(19)の回転に対して旋回入力連結部(116)の動きを逆方向にし、前後進の何れにおいても操向ハンドル(19)の回動操作方向と機体の旋回方向とを一致させ、回転操作する丸形の操向ハンドル(19)の回転操作によって例えばトラクタまたは田植機など四輪自動車と同様の運転感覚で進路修正及び方向転換などを行う。
【0034】
さらに、図19、図20は機体の左右旋回時における操向ハンドル(19)の切れ角と左右走行クローラ(2)の速度の関係を示すもので、ハンドル(19)の切れ角が大となる程左右走行クローラ(2)の速度差は大となると共に、左右走行クローラ(2)の平均速度となる機体中心速度も走行速度(高速・標準・低速)状態に応じて減速される。直進位置の操向ハンドル(19)を左方向(右方向)に約15度回転させると、前記位相調節孔(149)内を連係ボルト(97)が移動し、挾みバネ(98)によって変速入力部材(96)が直進と同一位置に維持されると共に、旋回用HST(28)の第2油圧ポンプ(26)によって第2油圧モータ(27)を正転(逆転)させる操向出力によって左方向(右方向)に旋回させ、未刈り穀稈(作物)列の湾曲に合せる進路修正を行う。このとき、旋回内側の走行クローラ(2)の減速量と、旋回外側の走行クローラ(2)の増速量が略等しくなり、機体中心速度が直進と略同一速度に保たれる。また、操向ハンドル(19)を直進位置から15度以上回転させると、挾みバネ(98)に抗して変速入力部材(96)が左旋回及び右旋回のいずれでも減速動作し、第1油圧ポンプ(23)及びモータ(24)の走行変速出力を減速させ、左右走行クローラ(2)を同一方向に回転駆動させて前進(または後進)させ、左右走行クローラ(2)の走行速度差により左方向(右方向)に旋回するブレーキターン動作を行わせ、未刈り穀稈(作物)列から外れたときに元の列に戻したり隣の列に移動させる進路修正を行う。さらに、操向ハンドル(19)を約135度回転させると、機体中心速度が直進時の約4分の1に減速され、旋回内側の走行クローラ(2)が逆転駆動され、旋回内側の走行クローラ(2)を中心として機体が旋回するスピンターン動作が行われ、左右走行クローラ(2)の左右幅だけ旋回方向にずらせて機体を180度方向転換させるもので、ハンドル角度0度からハンドル角度135度の範囲で操向ハンドル(19)を回転させて左または右方向の旋回操作を行い、直進位置を中心とした左右15度のハンドル(19)回転範囲で未刈り穀稈(作物)列に沿って移動する条合せ進路修正を、直進時の走行速度を維持し乍ら行うと共に、直進位置から左右135度のハンドル(19)回転により、圃場枕地で機体を方向転換させて次作業工程に移動させるスピンターン動作を、直進時の約4分の1の走行速度に自動的に減速して行う。
【0035】
さらに、副変速を標準(秒速1.5メートル)速度に保ち、操向ハンドル(19)を90度回転させたとき、主変速レバー(73)操作により主変速出力を高速及び3分の2及び3分の1に変更しても、機体の旋回半径が略一定に保たれた状態で、旋回速度(機体中心速度)だけを変化させる。また、直進位置を基準として連係ボルト(97)と位相調節孔(149)の設定範囲で第1油圧ポンプ(23)第1油圧モータ(24)を直進状態に維持させ、農作業中に作物列または畦などに機体を沿わせる操向操作を行っても走行速度が不均一に変化するのを防止し、略同一走行速度を保ち乍ら農作業中の進路修正を行え、作業者の運転感覚と機体の走行動作とを略一致させて適正な操向操作を行える。また、主変速レバー(73)の変速基準値を切換える副変速レバー(74)副変速操作の低速及び標準及び高速切換に比例させて旋回半径を小径乃至大径に変化させ、第1油圧ポンプ(23)及びモータ(24)と走行クローラ(2)間の減速比並びに第2油圧ポンプ(26)及びモータ(27)と走行クローラ(2)間の減速比の設定、或いはスピンターン動作に必要な小半径旋回に必要な走行駆動力の確保などを図ると共に、同一副変速操作位置で主変速レバー(73)を操作することによって旋回半径を略一定に保った状態で旋回時の走行速度を変化させ、作業者の熟練度などに応じた運転操作を行え、機動性の向上並びに運転操作性の向上などを図る。
【0036】
上記のように、エンジン(21)の駆動力を左右走行クローラ(2)に伝える差動機構(33)と、左右走行クローラ(2)の駆動速度を無段階に変更させる直進用HST(25)と、左右走行クローラ(2)の駆動速度の差を無段階に変化させる旋回用HST(28)を設ける移動農機において、操向操作具(19)によって回転させる操向入力軸(87)と、変速操作具(73)によって回転させる変速入力軸(91)と、変速入力軸(91)を変速部材(25)に連結させる変速機構(124)と、操向入力軸(87)を操向部材(28)に連結させる操向機構(118)を設け、変速機構(124)動作量に比例させて操向機構(118)操向量を変化させるように構成し、要するに、運転席(20)前方のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設け、主変速操作を直接直進用HST(25)に伝えるのではなく、一旦ステアリングコラム(71)に入力して直進用HST(25)に伝えるようにし、ステアリングコラム(71)の内部機構によって入力された主変速操作量に比例させて操向操作量を変化させ、その操向操作を旋回用HST(28)に伝えることによって、高速側走行変速によって操向量を自動的に拡大し、かつ低速側走行変速によって操向量を自動的に縮少し、操向ハンドル(19)の一定量の操作によって走行速度に関係なく左右走行クローラ(2)の旋回半径を略一定に維持し、農作業走行速度の変更並びに作物列などに機体を沿わせる進路修正などを容易に行うように構成している。
【0037】
図21乃至図41に示す如く、操向ハンドル(19)を設ける胴長のステアリングコラム(71)は、運転操作部(18)の下側左右側部に延設された左右のシャーシフレーム(3a)の先端側の間に下端部を固定支持するもので、そのステアリングコラム(71)と運転席(20)との間の運転操作部(18)底部とステアリングコラム(71)下部の左右両側にステップ板(134)を張設し、ステアリングコラム(71)の左右両側に作業者の両足を入れて載せることによって、運転操作部(18)の前後長を縮小し、機体の全長を縮小するように構成している。
【0038】
さらに、ステアリングコラム(71)の左側のステップ板(134)の横幅を右側のステップ板(134)の横幅より幅広に形成し、ステアリングコラム(71)とサイドコラム(72)との間に作業者の左足を入れて載せる充分なスペースを確保すると共に、ステアリングコラム(71)左側のステップ板(134)の刈取部(8)側への張り出しによって、刈取部(8)を最上昇位置に上昇させたとき、刈取部(8)右側のカバーなどがステップ板(134)に干渉するのを防止するため、ステップ板(134)前部を傾斜状に立上げ形成している。
【0039】
また、ステップ板(134)は、ステアリングコラム(71)の左右両側の前部左及び右ステップ部(134a)(134b)と、ステアリングコラム(71)より後部のステップ本体(134c)とに分割形成し、前部左及び右ステップ部(134a)(134b)をシャーシフレーム(3a)に常時固定とし、ステップ本体(134c)をシャーシフレーム(3a)に対し着脱自在に取付け、ステップ本体(134c)を取外すことにより、この下面側の構造のメンテナンスなどを簡単に行えるように構成している。
【0040】
前記ステップ板(134)の下面側に燃料タンク(200)を配設し、前記シャーシフレーム(3a)に燃料タンク(200)を固定支持させ、ステアリングコラム(71)と燃料タンク(200)との間にステアリングコラム(71)から前記変速操作軸(125)及び操向操作軸(126)を突出させ、前記ロッド(138)(143)をステップ板(134)と燃料タンク(200)との間に張架させ、且つ、ターンバックル(137)(142)をステップ板(134)と燃料タンク(200)との間に設けることによって、変速操作軸(125)及び操向操作軸(126)及びロッド(138)(143)及びターンバックル(137)(142)への泥及び塵埃の付着を燃料タンク(200)で防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らすように構成している。
【0041】
また、前記主変速軸(99)を、ステップ板(134)前部の立上げによって形成された前部左ステップ部(134a)下面側の余剰スペースにステアリングコラム(71)から突出させ、機体のコンパクト化を図ると共に、前記主変速軸(99)をステップ板(134)とシャーシフレーム(3a)との間に設け、外部から加えられる衝撃などから主変速軸(99)を保護し、主変速操作の伝達精度を下げる要因を減らすように構成している。
【0042】
サイドコラム(72)は、主変速レバー(73)、副変速レバー(74)、刈取クラッチレバー(75)、脱穀クラッチレバー(76)のレバー溝及び各種スイッチ、表示ランプ、表示モータなどを設けるサイドパネル(72a)と、サイドパネル(72a)を上面側に固定支持し、且つ各レバー(73)(74)(75)(76)のレバー支点軸などを取付けるサイドコラム(72)の支持フレーム構造(201)と、サイドコラム(72)の運転席(20)側に張設する側壁(202)とで構成され、主変速レバー(73)及び副変速レバー(74)などを設けて主変速操作部及び副変速操作部を形成するもので、サイドコラム(72)を運転操作部(18)の左側に配設し、そしてこのサイドコラム(72)の下方に、即ちサイドパネル(72a)の下方に各HST(25)(28)を搭載する前記ミッション(22)を配設し、支持フレーム構造(201)をステアリングコラム(71)を固定支持させる前記シャーシフレーム(3a)に固定支持させる。
【0043】
また、ミッション(22)の上面前部に搭載する旋回用HST(28)とミッション(22)の上面後部に搭載する直進用HST(25)とをミッション(22)に取付けるHST取付座(204)を設け、旋回用HST(28)と直進用HST(25)との間に所定の隙間を設けて、各HST(25)(28)を伝達ベルト(30a)(30b)の内側の面でミッション(22)に一体連結すると共に、これら三者を一体に連結し、一方のHST(25)の上面側で前記HST取付座(204)の上面と一体連結する支持座(205)にもサイドコラム(72)の支持フレーム構造(201)を固定支持させている。
【0044】
サイドコラム(72)の側壁(202)は開閉自在に蓋板などで形成し、サイドコラム内部機構及び各HST(25)(28)及びミッション(22)のメンテナンスを運転席(20)から簡単に行えるように構成している。なお、前記側壁(202)の前縁から前方に延出して作業者の左足の左側に張設するカバー(203)を設ける。
【0045】
主変速レバー(73)は前記のように、サイドコラム(72)の支持フレーム構造(201)に取付けたレバー支点軸(105)と、レバー支点軸(105)に回転自在に軸支させ、且つ、筒軸(107)を介して主変速レバー(73)基部を左右方向に揺動自在に取付ける支点板(106)と、リンク(109)(108)を介して支点板(106)を連結させる中介軸(100)と、中介軸(100)を主変速軸(99)に連結させるリンク(102)(101)及び長さ調節ターンバックル(103)付きロッド(104)とで形成する主変速操作伝達経路によって、主変速軸(99)と連結され、主変速レバー(73)の主変速操作が主変速軸(99)に伝達入力されるもので、前記中介軸(100)の主変速操作入力側端部を、サイドコラム(72)下方の前記HST取付座(204)の上面と一体連結した支持座(205)に固定する球関継手(206a)に軸受させると共に、前記中介軸(100)の主変速操作出力側端部を、サイドコラム(72)の右側のステップ板(134)下面側のシャーシフレーム(3a)に固定する球関継手(206b)に軸受けさせ、中介軸(100)を振動が異なるミッション(22)部とシャーシフレーム(3a)の間で機体左右方向に適正に軸支させ、中介軸(100)及びロッド(104)を介して主変速操作をサイドコラム(72)の右側外側でステアリングコラム(71)の主変速軸(99)に伝達するように構成している。なお、レバー支点軸(105)上に支点板(106)を挾持する摩擦板(213)(214)を設け、主変速レバー(73)の操作位置決めを行う。またデテント力はナット(215)の緩め締めでバネ(216)力を調節して行う。
【0046】
また、副変速操作入力部である副変速シフタ軸(207)を前記ミッション(22)の前面側に設けるもので、サイドコラム(72)の支持フレーム構造(201)に取付けたレバー支点軸(208)に、副変速軸(74)基部の筒軸(209)を回転自在に嵌合し、前記筒軸(209)からミッション(22)の前面側上方に副変速アーム(210)を一体延出させ、略垂直なロッド(211)及びリンク(212)を介して副変速アーム(210)を前記副変速シフタ軸(207)に連結させ、副変速レバー(74)をレバー支点軸(208)回りに前後方向に揺動させる変速操作をミッション(22)の前面側で副変速シフタ軸(207)に伝達し、副変速シフタ軸(207)を正逆転させ、副変速の切換を行うように構成している。
【0047】
さらに、運転操作部(18)に駐車ブレーキペダル(217)と駐車ブレーキレバー(218)とを備え、駐車ブレーキペダル(217)をステアリングコラム(71)とサイドコラム(72)との間の前部左ステップ部(134a)上面側に配設し、駐車ブレーキレバー(218)を運転操作部(18)の右側前部に配設するもので、ステップ板(134)の後左角部上面側にペダル支点軸(219)を機体左右方向に横架させ、シャーシフレーム(3a)に固定支持する筒軸(220)に前記ペダル支点軸(219)を回転自在に取付け、サイドコラム(72)の右外側のペダル支点軸(219)にペダルアーム(221)基部を係合軸支させ、ステップ板(134)の左端部で前記ペダルアーム(221)を前方に延出し、前部左ステップ部(134a)上方のペダルアーム(221)先端に駐車ブレーキペダル(217)を固定させる。一方右側のシャーシフレーム(3a)の前端部に固定支持する筒軸(223)にレバー支点軸(222)を回転自在に取付け、レバー支点軸(222)に駐車ブレーキレバー(218)基部を係合軸支させる。
【0048】
そして、前記ペダル支点軸(219)を側壁(202)の後部下縁に形成した切欠き部(224)からサイドコラム(72)内部に突入させ、サイドコラム(72)内部のペダル支点軸(219)軸端に駐車ブレーキ操作出力部である出力アーム(225)を設けるもので、駐車ブレーキアーム(221)と連動する前記出力アーム(225)に操作ワイヤ(226)及びリンク(229)を介してレバー支点軸(222)を連結し、駐車ブレーキペダル(217)の踏込みによる駐車ブレーキ操作と駐車ブレーキレバー(218)の傾倒操作による駐車ブレーキ操作を前記出力アーム(223)に伝達する。
【0049】
また前記出力アーム(223)にリターンバネ(228)力を付勢すると共に、サイドコラム(72)の支持フレーム構造(201)に取付けた支軸(229)に回転自在に支持する牽制操作板(230)を設け、前記出力アーム(223)を牽制操作板(230)にリンク又はターンバックル付きロッドの連結部材(231)を介して連結し、駐車ブレーキ操作入力部であるミッション(22)左側面の駐車ブレーキシフタ(232)に操作ワイヤ(233)を介して牽制操作板(230)を連結し、駐車ブレーキペダル(217)の踏込みによる駐車ブレーキ操作と駐車ブレーキレバー(218)の傾倒操作による駐車ブレーキ操作を前記出力アーム(223)から駐車ブレーキシフタ(232)に伝達し、前記駐車ブレーキ(57)を作動させるように構成している。なお、図中(237)は駐車ブレーキペダル(217)を踏込み位置に保持するための係合ロッドである。
【0050】
また、駐車ブレーキ(57)をかけた時、主変速レバー(73)を中立位置に保持(既に中立位置のとき)又は復帰保持(中立以外の位置にあるとき)させる牽制機構(233)を設けるもので、牽制機構(233)は牽制ローラ(234)と、牽制ローラ(234)を嵌合する溝孔(235)を有する牽制板(236)と、前記牽制操作板(230)とで構成し、牽制ローラ(234)を主変速操作系の支点板(106)に取付け、牽制板(236)を駐車ブレーキ操作系に組込む牽制操作板(230)に取付け、駐車ブレーキ(57)をかけていない時は溝孔(235)の大形部(235a)内部に牽制ローラ(234)を位置させ、主変速操作を許す一方、駐車ブレーキ(57)をかけた時主変速が中立のときの牽制ローラ(234)位置に溝孔(235)の小形部(235b)端部を移動させることによって、牽制ローラ(234)の中立位置からの移動を規制又は牽制ローラ(234)の中立位置への移動復帰後中立位置からの移動を規制するように構成している。
【0051】
また、駐車ブレーキ操作をサイドコラム(72)からミッション(22)の駐車ブレーキ(57)部に伝達する操作ワイヤ(233)は、直進用HST(25)と旋回用HST(28)との間を通し、牽制操作板(230)と駐車ブレーキシフタ(232)との間に張架するもので、前記HST取付座(204)の直進用HST(25)と旋回用HST(28)との隙間に対応する位置に孔(238)を開口し、HST取付座(204)の内面側からミッション(22)の左側面に前記操作ワイヤ(233)を通し、伝達ベルト(30a)(30b)の内側でミッション(22)左側面に沿わせて前記操作ワイヤ(233)を駐車ブレーキシフタ(232)に導くように構成している。
【0052】
さらに、前記HST取付座(204)には前記伝達ベルト(30a)(30b)のテンションローラ(239)(240)の同軸のテンションアーム支点(241)を取付けている。
【0053】
また、シャーシフレーム(3)(3a)及びそのシャーシフレーム(3)(3a)に溶接固定する固定物及び前記サイドコラム(72)をミッション(22)を車軸(242)を中心に回動させた軌跡外に配置し、メンテナンス組立、開発のときのチェックを簡単に行えるように構成している。なおミッション(22)と連結するサイドコラム(72)の支持フレーム構造(201)などの締結は長穴(243)を使用し、位置ズレに対応できるようにしている。
【0054】
運転席(20)前方のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設けた移動農機において、前記各HST(25)(28)を搭載するミッション(22)を前記サイドコラム(72)の下方に配設することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者を従来に比べ接近配置し、主変速操作及び操向操作の伝達距離の短縮を図り、これら操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。また主変速操作及び操向操作の伝達部材やその他サイドコラム内部機構に対する泥及び塵埃の付着をミッション(22)及びミッション部の防塵カバーなどで防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らす。さらに前記ミッション(22)に設ける駐車ブレーキ(57)をかけた時、サイドコラム(72)の主変速レバー(73)を中立位置に保持又は復帰保持させる牽制機構(233)を設ける。これによって駐停止時にサイドコラム(72)の主変速レバー(73)などの主変速操作部の誤操作を防止し、駐停止時に主変速操作部を確実に中立位置に保持し、誤った主変速操作がステアリングコラム(71)に伝えられ、ステアリングコラム内部機構を破損させたり機体を走行させるのを防止する。
【0055】
また、牽制機構(233)をサイドコラム(72)内部に設けることによって、ステアリングコラム内部機構をさらに複雑にするのを防止する。また主変速操作及び操向操作の伝達部材と同様に牽制機構(233)も泥及び塵埃の付着をミッション(22)及びミッション部の防塵カバーなどで防止し、牽制機構(233)の動作不良を防止する。
【0056】
また、サイドコラム(72)内部に駐車ブレーキ操作出力部(225)を設け、前記出力部(225)からミッション(22)側面に設ける駐車ブレーキ操作入力部(232)に駐車ブレーキ操作を伝達する駐車ブレーキ操作ワイヤ(233)を、旋回用HST(28)と直進用HST(25)との間を通して前記駐車ブレーキ操作出力部(225)と入力部(232)との間に張架することによって、駐車ブレーキ操作ワイヤ(233)をあまり蛇行させることなく張架し、駐車ブレーキ操作の伝達距離の短縮を図り、駐車ブレーキ操作系のコンパクト化及び操作の伝達精度を上げる、即ち駐車ブレーキ操作精度を上げる。
【0057】
また、ステアリングコラム(71)とサイドコラム(72)との間に設ける駐車ブレーキペダル(217)の踏込操作を前記駐車ブレーキ操作出力部(225)に与えることによって、ステアリングコラム(71)とサイドコラム(72)との間に作業者のサイドコラム(72)側の片足を入れて載せるスペースを有効に利用してコンパクト化を図りながら操作性に優れる駐車ブレーキ操作部を形成する。又はサイドコラム(72)と反対側の機体外側に設ける駐車ブレーキレバー(218)の傾倒操作を前記駐車ブレーキ操作出力部(225)に与えることによって、機体から降りた作業者でも操作可能な駐車ブレーキ操作部を形成する。又は前記駐車ブレーキペダル(217)と前記駐車ブレーキレバー(218)との2系統の駐車ブレーキ操作系を設けることによって、機体に乗っていても機体から降りていても何れでも操作可能な駐車ブレーキ操作部を形成する。
【0058】
また、サイドコラム(72)の運転席(20)側側壁(202)を開閉自在に形成することによって、ミッション(22)上側の旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)及び主変速操作部及び駐車ブレーキ操作系その他サイドコラム内部機構などのメンテナンスが運転席(20)側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作及び駐車ブレーキ操作の伝達精度を上げる、即ち主変速操作及び操向操作及び駐車ブレーキ操作精度を上げる。
【0059】
運転席(20)前方のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設けた移動農機において、前記各HST(25)(28)を搭載するミッション(22)を前記サイドコラム(72)の下方に配設する。又は運転席(20)前方のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設けた移動農機において、前記各HST(25)(28)を搭載するミッション(22)の上方に前記サイドコラム(71)を配設することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者を従来に比べ接近配置し、主変速操作及び操向操作の伝達距離の短縮を図り、これら操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。また主変速操作及び操向操作の伝達部材やその他サイドコラム内部機構に対する泥及び塵埃の付着をミッション(22)及びミッション部の防塵カバーなどで防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らす。
【0060】
また、ミッション(22)へのHST取付座(204)とサイドコラム(72)の支持フレーム(201)を連結することによって、主変速の操作部(73)と被操作部(135)を一体の構造物で支持し、主変速操作系の支持剛性を高め、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラム(72)はステアリングコラム(71)を支持しているシャーシフレーム(3a)にも連結することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者が一体的に支持され、主変速操作系及び操向操作系両方の支持剛性を高め、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0061】
また、ミッション(22)の前面側に副変速操作入力部(207)を設け、ミション(22)の前面側でサイドコラム(72)からの副変速操作を伝達することによって、副変速操作系が主変速操作及び操向操作の伝達精度を上げるための好ましい主変速操作系及び操向操作系の形成を妨げるのを防止する。一方サイドコラム(72)からミション(22)の副変速操作入力部(207)への副変速操作伝達を上下に直線的(垂直又は略垂直)に行え、また主変速と同様に副変速操作の操作部(74)と被操作部(207)も一体の構造物で支持されているので、副変速操作の伝達精度を上げる、即ち副変速操作精度を上げると共に、副変速操作系のコンパクト化を図り、ひいてはサイドコラム内部構造の簡素化を図る。
【0062】
また、サイドコラム(92)の運転席(20)側側壁を開閉自在に形成することによって、ミッション(22)上側の旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)及び主変速操作部及び副変速操作系その他サイドコラム内部機構などのメンテナンスが運転席(20)側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作及び副変速操作の伝達精度を上げる、即ち主変速操作及び操向操作及び副変速操作精度を上げる。またステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(143)及び主変速操作伝達部材(138)の長さ調節などを、旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)の状態を目視確認しながら適正に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作及び副変速操作精度を上げる。
【0063】
運転席(20)前方のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設けた移動農機において、前記各HST(25)(28)を搭載するミッション(22)を前記サイドコラム(72)の下方に配設し、機体左右方向に主変速操作伝達経路を形成する主変速操作横伝達部材(100)と機体前後方向に主変速操作伝達経路を形成する長さ調節自在な主変速操作縦伝達部材(104)を設け、サイドコラム(72)から主変速操作横伝達部材(100)及び主変速操作縦伝達部材(104)を介してサイドコラム(72)の運転席(20)側外側で主変速操作をステアリングコラム(71)の主変速操作入力部(99)に伝達することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者を従来に比べ接近配置し、主変速操作及び操向操作の伝達距離の短縮を図り、これら操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。また主変速操作及び操向操作の伝達部材やその他サイドコラム内部機構に対する泥及び塵埃の付着をミッション(22)及びミッション部の防塵カバーなどで防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らす。また主変速操作をその操作方向と同方向でサイドコラム(72)からステアリングコラム(71)に伝達し、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラム(72)からステアリングコラム(71)への主変速操作伝達系のメンテナンスを運転席(20)側から簡単に行え、これを常に適正状態に保ち、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。
【0064】
また、ミッション(22)へのHST取付座(204)にサイドコラム(72)の支持フレーム(201)を連結すると共に、主変速操作横伝達部材(100)の入力側端部を前記HST取付座(204)に支持させ、主変速操作横伝達部材(100)の出力側端部をシャーシフレーム(3a)に支持させるこちによって、主変速の操作部(73)と被操作部(135)を一体の構造物で支持し、またサイドコラム(72)からステアリングコラム(71)への主変速操作系の支点部となる主変速操作横伝達部材(100)も主変速の操作部(73)と被操作部(135)を支持する一体の構造物で支持し、主変速操作系の支持剛性を高め、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラム(72)はステアリングコラム(71)を支持しているシャーシフレーム(3a)にも連結することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者が一体的に支持され、主変速操作系及び操向操作系両方の支持剛性を高め、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0065】
また、ステアリングコラム(71)の操向操作出力部(126)と旋回用HST(28)との間の操向操作伝達経路を形成する長さ調節自在な操向操作伝達部材(143)とステアリングコラム(71)の主変速操作出力部(125)と直進用HST(25)との間の主変速操作伝達経路を形成する長さ調節自在な主変速操作伝達部材(138)とを設け、運転席(20)前方下方に張設する着脱自在なステップ板(134c)の下面側に主変速操作縦伝達部材(104)及び操向操作伝達部材(143)及び主変速操作伝達部材(138)を配設し、且つ各伝達部材(104)(143)(138)の長さ調節部(103)(142)(137)を前記ステップ板(134c)の下面側に設けることによって、サイドコラム(72)からステアリングコラム(71)への主変速操作伝達部材(104)とステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(43)及び主変速操作伝達部材(138)の長さ調節を簡単に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0066】
また、サイドコラム(72)の運転席(20)側側壁(202)を開閉自在に形成することによって、ミッション(22)上側の旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)及び主変速操作部及びその他サイドコラム内部機構などのメンテナンスが運転席(20)側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。またステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(143)及び主変速操作伝達部材(138)の長さ調節を、旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)の状態を目視確認しながら適正に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0067】
昇降する刈取部(8)側方に運転操作部(18)を配設したコンバインにおいて、運転操作部(18)のステップ板(134)前部を傾斜状に立ち上げることによって、最上昇位置に上昇させた刈取部(8)の運転席(20)側側部にステップ板(134)を干渉させるのを防止し、ステアリングコラム(71)とサイドコラム(72)との間に作業者の刈取部(8)側の片足を入れて載せる充分なスペースを確保し、運転操作部(18)の前後長を縮小し、ひいては機体の全長を縮小し、機体のコンパクト化を図る。また傾斜状に立ち上げたステップ板(134)前部は作業者の両足を載せ易く、作業姿勢の安定化を図る。
【0068】
また、運転操作部(18)の運転席(20)前方にステアリングコラム(71)を立設させると共に、運転操作部(18)の刈取部(8)側側部にサイドコラム(72)を設け、ステップ板(134)より低位のステアリングコラム(71)に旋回用HST(28)への操向操作出力部(126)と共にサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設け、旋回用HST(28)と直進用HST(25)を搭載するミッション(22)を前記サイドコラム(72)の下方に配設し、ステップ板(134)の下面側に操向操作伝達経路及び主変速操作伝達経路を形成し、操向操作伝達経路及び主変速操作伝達経路上面側のステップ板(134c)を着脱自在に設けることによって、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0069】
また、サイドコラム(72)の運転席(20)側側面を開閉自在に形成することによって、ミッション(22)上側の旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)及び主変速操作部及びその他サイドコラム内部機構などのメンテナンスが運転席(20)側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。またステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(143)及び主変速操作伝達部材(138)の長さ調節などを、旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)の状態を目視確認しながら適正に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0070】
また、ステップ板(134)前部の立ち上げによって形成されたサイドコラム(72)側のステアリングコラム(71)側部のステップ板(134)前部下面側の空間に主変速操作入力部(99)を設けることによって、余剰スペースを有効に利用して主変速操作入力部(99)を設け、機体のコンパクト化に寄与する。
【0071】
【発明の効果】
以上、実施例から明らかなように、本発明は、運転席(20)前方の丸ハンドル式のステアリングコラム(71)に、旋回用HST(28)への操向操作出力部(126)と共に運転席(20)側方のサイドコラム(72)からの主変速操作入力部(99)及び直進用HST(25)への主変速操作出力部(125)を設け、各HST(28)(25)を搭載したミッション(22)を前記サイドコラム(72)の下方に配設し、そのミッション ( 22)の旋回用HST ( 28)とステアリングコラム ( 71)の操向操作出力部 ( 126)との間の操向操作伝達経路を形成する長さ調節自在な操向操作伝達部材 ( 143)と、同ミッション ( 22)の直進用HST ( 25)とステアリングコラム ( 71)の主変速操作出力部 ( 125)との間の主変速操作伝達経路を形成する長さ調節自在な主変速操作伝達部材 ( 138)と、前記主変速操作入力部 ( 99)に連繋する主変速操作横伝達部材 ( 100)及び長さ調節自在の主変速操作縦伝達部材 ( 104)とを設けた移動農機において、前記各HST ( 28) ( 25)をミッション ( 22)へ取付けるHST取付座 ( 204)にサイドコラム ( 72)の支持フレーム ( 201)を連結すると共に、前記主変速操作横伝達部材 ( 100)の入力側端部をHST取付座 ( 204)に支持させ、同伝達部材 ( 100)の出力側端部をシャーシフレーム ( 3a)に支持させて設けて、主変速操作横伝達部材 ( 100)及び主変速操作縦伝達部材 ( 104)は、サイドコラム ( 72)の運転席 (20 )側の外側で主変速操作をステアリングコラム ( 71)の主変速操作入力部 ( 135)に伝達するように構成するとともに、この主変速操作横伝達部材 ( 100)及び主変速操作縦伝達部材 ( 104)と、前記操向操作伝達部材 ( 143)と、主変速操作伝達部材 ( 138)の全てを前記サイドコラム ( 72)の横側部に位置する前記運転席 ( 20)の前方下方に張設するステップ板 ( 134)の下方に位置させて各伝達部材 ( 104) ( 143) ( 138)の長さ調節部 ( 103) ( 142) ( 137)をステップ板 ( 134)の下面側に集約配置し、前記ステップ板 ( 134)とサイドコラム ( 72)の運転席 ( 20)側の側壁 ( 202)の双方を開閉自在に形成したことによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者を従来に比べ接近配置し、主変速操作及び操向操作の伝達距離の短縮を図り、これら操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。また主変速操作及び操向操作の伝達部材やその他サイドコラム内部機構に対する泥及び塵埃の付着をミッション(22)及びミッション部の防塵カバーなどで防止し、主変速操作及び操向操作の伝達精度を下げる要因を減らす。また主変速操作をその操作方向と同方向でサイドコラム(72)からステアリングコラム(71)に伝達し、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。
またサイドコラム(72)からステアリングコラム(71)への主変速操作伝達系のメンテナンスを運転席(20)側から簡単に行え、これを常に適正状態に保ち、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。
【0072】
また、ミッション(22)へのHST取付座(204)にサイドコラム(72)の支持フレーム(201)を連結すると共に、主変速操作横伝達部材(100)の入力側端部を前記HST取付座(204)に支持させ、主変速操作横伝達部材(100)の出力側端部をシャーシフレーム(3a)に支持させるこちによって、主変速の操作部(73)と被操作部(135)を一体の構造物で支持し、またサイドコラム(72)からステアリングコラム(71)への主変速操作系の支点部となる主変速操作横伝達部材(100)も主変速の操作部(73)と被操作部(135)を支持する一体の構造物で支持し、主変速操作系の支持剛性を高め、主変速操作の伝達精度を上げる、即ち主変速操作精度を上げる。またサイドコラム(72)はステアリングコラム(71)を支持しているシャーシフレーム(3a)にも連結することによって、ステアリングコラム(71)とサイドコラム(72)と旋回用HST(28)及び直進用HST(25)を搭載するミッション(22)の三者が一体的に支持され、主変速操作系及び操向操作系両方の支持剛性を高め、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0073】
また、ステアリングコラム(71)の操向操作出力部(126)と旋回用HST(28)との間の操向操作伝達経路を形成する長さ調節自在な操向操作伝達部材(143)とステアリングコラム(71)の主変速操作出力部(125)と直進用HST(25)との間の主変速操作伝達経路を形成する長さ調節自在な主変速操作伝達部材(138)とを設け、運転席(20)前方下方に張設する着脱自在なステップ板(134c)の下面側に主変速操作縦伝達部材(104)及び操向操作伝達部材(143)及び主変速操作伝達部材(138)を配設し、且つ各伝達部材(104)(143)(138)の長さ調節部(103)(142)(137)を前記ステップ板(134c)の下面側に設けることによって、サイドコラム(72)からステアリングコラム(71)への主変速操作伝達部材(104)とステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(43)及び主変速操作伝達部材(138)の長さ調節を簡単に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【0074】
また、サイドコラム(72)の運転席(20)側側壁(202)を開閉自在に形成することによって、ミッション(22)上側の旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)及び主変速操作部及びその他サイドコラム内部機構などのメンテナンスが運転席(20)側から簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。またステアリングコラム(71)から旋回用HST(28)及び直進用HST(25)への操向操作伝達部材(143)及び主変速操作伝達部材(138)の長さ調節を、旋回用HST(28)及び直進用HST(25)の操向操作入力部(140)及び主変速操作入力部(135)の状態を目視確認しながら適正に行え、主変速操作系及び操向操作系を適正に形成し、且つメンテナンスも簡単に行え、これらを常に適正状態に保ち、主変速操作及び操向操作の伝達精度を上げる、即ち主変速操作及び操向操作精度を上げる。
【図面の簡単な説明】
【図1】コンバインの全体側面図
【図2】コンバインの全体平面図
【図3】ミッション駆動系の説明図
【図4】走行変速及び操向操作部の説明斜視図
【図5】同部の作動説明図
【図6】ステアリングコラムの側面図
【図7】同上部拡大側面図
【図8】同下部拡大側面図
【図9】ステアリングコラムの正面図
【図10】同上部拡大正面図
【図11】同下部拡大正面図
【図12】図4の平面説明図
【図13】同拡大図
【図14】ステアリングコラム横断面図
【図15】図14の分解説明図
【図16】ステアリングコラム上部の部分平面図
【図17】同部分図
【図18】図17の作動説明図
【図19】主変速と操向ハンドル操作を表わす線図
【図20】副変速と操向ハンドル操作を表わす線図
【図21】運転操作部の右側面図
【図22】運転操作部の左側面図
【図23】同上部拡大側面図
【図24】同下部拡大側面図
【図25】サイドコラムの側面図
【図26】同平面図
【図27】同正面図
【図28】主変速操作系入力部の側面図
【図29】同平面図
【図30】同正面図
【図31】中介軸の平面図
【図32】主変速操作及び操向操作系の出力部の側面図
【図33】同平面図
【図34】同正面図
【図35】副変速操作系の側面図
【図36】同正面図
【図37】駐車ブレーキ操作系の側面図
【図38】同平面図
【図39】同正面図
【図40】牽制機構部の拡大側面図
【図41】ミッション上部の拡大側面図
【符号の説明】
(2) 走行クローラ
(3)(3a) シャーシフレーム
(8) 刈取部
(18) 運転操作部
(19) 操向ハンドル
(20) 運転席
(21) エンジン
(22) ミッション
(23) 第1油圧ポンプ
(24) 第1油圧モータ
(25) 直進用HST
(26) 第2油圧ポンプ
(27) 第2油圧モータ
(28) 旋回用HST
(47) 副変速軸
(49) 駐車ブレーキ軸
(57) 駐車ブレーキ
(71) ステアリングコラム
(72) サイドコラム
(73) 主変速レバー
(74) 副変速レバー
(99) 主変速軸(主変速操作入力部)
(100) 中介軸(主変速操作横伝達部材)
(103) ターンバック
(104) ロッド(主変速操作縦伝達部材)
(125) 変速操作軸(主変速操作出力部)
(126) 操向操作軸(操向操作出力部)
(134) ステップ板
(135) 第1トラニオン(主変速操作入力部)
(137) ターンバック
(138) ロッド(主変速操作伝達部材)
(140) 第2トラニオン
(142) ターンバック
(143) ロッド(操向操作伝達部材)
(202) サイドコラム側壁
(233) 牽制機構
(225) 出力アーム(駐車ブレーキ操作出力部)
(232) 駐車ブレーキシフタ(駐車ブレーキ操作入力部)
(217) 駐車ブレーキペダル
(218) 駐車ブレーキレバー
(204) HST取付座
(201) 支持フレーム構造
(207) 副変速シフタ軸(副変速操作入力部)
(233) 駐車ブレーキ操作ワイヤ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile agricultural machine such as a combine harvester that continuously harvests and thresh grain cereals in a field.
[0002]
[Prior art]
Conventionally, harvesting work is carried out while traveling along a row of uncut grain cereals in a field with a combine equipped with a left and right traveling crawler, and the combine is redirected at a field headland to change the direction of the next uncut grain. Although it was moved in a row, the left and right traveling output of the transmission case transmitting the engine output is transmitted to the left and right traveling crawlers via the left and right side clutches, and one of the left and right traveling crawlers is temporarily suspended by the intermittent operation of the left and right side clutches. When the vehicle is stopped and turned, it is necessary for the operator to perform both the left and right side clutch operations and the traveling speed change operation at substantially the same time, and the turning radius when turning in the field headland increases. there were. Therefore, by installing left and right hydraulic continuously variable transmissions that transmit engine power separately and driving the left and right crawlers, it is possible to easily reduce the turning radius and reduce the turning radius, etc. There was a problem that the steering operation for traveling along the uncut grain row was troublesome. In addition, by providing a single hydraulic continuously variable transmission mechanism that transmits engine power to the left and right traveling crawlers, and a hydraulic continuously variable steering mechanism that decelerates the traveling crawler on the inside of the turn and accelerates the traveling crawler on the outside of the turn, The straight running performance can be maintained well and the turning radius can be easily reduced, but there is a problem that the turning radius becomes larger by increasing the traveling speed or the turning radius becomes smaller by reducing the traveling speed. For example, to obtain a steering sensation that keeps the turning radius substantially constant regardless of the traveling speed, as in a four-wheeled vehicle, the operator sensibly changes the steering operation amount according to the change in the traveling speed during a traveling shift operation. There is a problem in handling such that it is easy to move away from an uncut grain row, an uncultivated land, or a crop row by meandering during agricultural work performed by straight traveling. In particular, when a round steering handle is provided, the steering performance can be improved while maintaining a constant traveling speed as compared with a steering structure having a left and right side clutch and a left and right side clutch lever. There is a problem that it is not easy to steer as if driving a four-wheeled vehicle, and it is not possible to easily improve driving operability such as driving speed change operation and steering operation and improvement of steering function. . Accordingly, the applicant of the present invention continuously changes the difference between the differential mechanism that transmits the driving force of the engine to the left and right traveling crawlers, the speed change member that changes the driving speed of the left and right traveling crawlers continuously, and the driving speed of the left and right traveling crawlers. In a mobile agricultural machine provided with a steering member, a steering input shaft that is rotated by a steering operation tool, a transmission input shaft that is rotated by a transmission operation tool, a transmission mechanism that connects the transmission input shaft to the transmission member, and a steering input shaft The steering mechanism is connected to the steering member, and the steering mechanism steering amount is changed in proportion to the operation amount of the speed change mechanism. The steering amount is automatically reduced by the side traveling shift, and the turning radius of the left and right traveling crawlers is maintained substantially constant regardless of the traveling speed by a certain amount of operation of the steering operation tool. Crops such as a column in the path modification be along the body and have developed easily performed technique.
[0003]
[Problems to be solved by the invention]
In short, the above-described technique basically includes a main shift operation input unit from the side column on the driver's seat side and a main shift operation output unit to the straight traveling HST, together with the steering operation output unit to the turning HST on the steering column in front of the driver's seat. The main shift operation is not directly transmitted to the straight traveling HST, but is once input to the steering column and transmitted to the straight traveling HST, and is operated in proportion to the main shift operation amount inputted by the internal mechanism of the steering column. The steering operation amount is changed and the steering operation is transmitted to the turning HST. The main transmission operation transmission member that transmits the main transmission operation from the side column to the steering column, and the main transmission operation and the steering operation from the steering column. A relatively long operation transmission member such as a main transmission operation transmission member and a steering operation transmission member for transmitting the operation to the straight traveling HST and the turning HST is required. Can not be obtained the desired function can not be properly transmitted to the main speed change operation and steering operation by using these operation transmitting member.
[0004]
Accordingly, the present invention provides a mobile agricultural machine capable of appropriately transmitting the main shift operation from the side column to the steering column and the main shift operation and the steering operation from the steering column to the straight traveling HST and the turning HST. It is aimed.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a mobile agricultural machine of the present invention includes a main steering operation input unit from a side column on the side of the driver's seat along with a steering operation output unit to the turning HST on a round handle type steering column in front of the driver's seat. In a mobile agricultural machine provided with a main shift operation output unit to the straight traveling HST, a main shift that forms a main shift operation transmission path in the left-right direction of the machine body by arranging a mission for mounting each HST below the side column. The main transmission operation vertical transmission member that can adjust the length of the operation lateral transmission member and the main transmission operation transmission path in the longitudinal direction of the machine body is provided, and the main transmission operation lateral transmission member and the main transmission operation vertical transmission member are provided from the side column. The main speed change operation is transmitted to the main speed change operation input portion of the steering column outside the driver seat side of the side column. As a result, the three missions equipped with the steering column, side column, turning HST, and straight traveling HST are placed closer together than before, and the transmission distance of the main shift operation and steering operation is shortened. In other words, the main shift operation and the steering operation accuracy are increased. In addition, the transmission of the main gear shift operation and steering operation and other side column internal mechanisms can be prevented from adhering mud and dust with the dust cover of the mission and the mission section, etc. cut back. In addition, the main transmission operation is transmitted from the side column to the steering column in the same direction as the operation direction, thereby increasing the transmission accuracy of the main transmission operation, that is, increasing the main transmission operation accuracy. In addition, maintenance of the main transmission operation transmission system from the side column to the steering column can be easily performed from the driver's seat side, and this is always maintained in an appropriate state to increase the transmission accuracy of the main transmission operation, that is, increase the main transmission operation accuracy.
[0006]
Also, the side frame support frame is connected to the HST mounting seat to the transmission, and the input side end of the main transmission operation lateral transmission member is supported by the HST mounting seat, and the output side end of the main transmission operation lateral transmission member. Is supported by the chassis frame. As a result, the main transmission operating portion and the operated portion are supported by an integral structure, and the main transmission operation lateral transmission member serving as a fulcrum portion of the main transmission operating system from the side column to the steering column is also the main transmission operating portion. It is supported by an integral structure that supports the operated portion, thereby increasing the support rigidity of the main transmission operation system and increasing the transmission accuracy of the main transmission operation, that is, increasing the main transmission operation accuracy. The side column is also connected to the chassis frame that supports the steering column, so that the three components of the steering column, the side column, the turning HST and the straight traveling HST are integrally supported, and the main shift operation The support rigidity of both the system and the steering operation system is increased, and the transmission accuracy of the main transmission operation and the steering operation is increased, that is, the main transmission operation and the steering operation accuracy are increased.
[0007]
Further, a steering operation transmission member having an adjustable length that forms a steering operation transmission path between the steering column steering operation output section and the turning HST, a main transmission operation output section of the steering column, and a straight traveling HST A main transmission operation transmission member that is adjustable in length and that forms a main transmission operation transmission path between the main transmission operation longitudinal transmission member and the operation unit on the lower surface side of a detachable step plate that extends in front of the driver's seat. A direction operation transmission member and a main speed change operation transmission member are disposed, and a length adjusting portion of each transmission member is provided on the lower surface side of the step plate. This makes it possible to easily adjust the lengths of the main transmission operation transmission member from the side column to the steering column, the steering operation transmission member from the steering column to the turning HST and the straight traveling HST, and the main transmission operation transmission member. System and steering operation system are properly formed, and maintenance can be easily performed, and these are always kept in an appropriate state to increase the transmission accuracy of the main shift operation and the steering operation, that is, the main shift operation and the steering operation accuracy are improved. increase.
[0008]
Further, the side wall of the driver's seat on the side column is formed to be openable and closable. As a result, maintenance of the steering operation input unit, main transmission operation input unit, main transmission operation unit, and other side column internal mechanisms of the turning upper HST and the straight traveling HST can be easily performed from the driver's seat side. Maintaining the proper state, the transmission accuracy of the main shift operation and the steering operation is increased, that is, the main shift operation and the steering operation accuracy are increased. Further, the length adjustment of the steering operation transmission member and the main transmission operation transmission member from the steering column to the turning HST and the straight traveling HST is performed, and the steering operation input unit and the main transmission operation input unit of the turning HST and the straight traveling HST are adjusted. Appropriately performed while visually checking the state, the main shift operation system and the steering operation system are properly formed, and maintenance can be easily performed. These are always kept in an appropriate state, and the transmission accuracy of the main shift operation and the steering operation is maintained. In other words, the main shift operation and the steering operation accuracy are increased.
[0009]
The term “HST” in the specification of the present application means a hydraulic drive unit (hydro-static transmission), which transmits power using hydraulic pressure, and is first generated by driving a hydraulic pump with an engine. The structure is such that pressure oil is guided to the hydraulic motor to transmit power. The speed is adjusted by changing the amount of oil using a variable displacement pump composed of a swash plate and a plunger.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is an overall side view of the combine, and FIG. 2 is a plan view thereof. In FIG. 1, (1) is a track frame on which a pair of left and right traveling crawlers (2) are installed, and (3) is the track frame (1). A chassis frame to be installed, (4) is a threshing section that stretches the feed chain (5) to the left and incorporates a handling cylinder (6) and a processing cylinder (7), (8) is a cutting blade (9) and grains A cutting part provided with a reed transport mechanism (10), (11) is a hydraulic cylinder that raises and lowers the reeding part (8) via a cutting frame (12), and (13) is a discharge part that faces the end of the waste chain (14). A cocoon processing unit, (15) is a cereal tank that carries the grain from the threshing unit (4) through the milling cylinder (16), and (17) carries the cereal of the tank (15) out of the machine. The discharge auger (18) has a round steering handle (19) and a driver seat (20). Driving operation unit, and configured to threshing harvests (21) the driver's seat (20) an engine provided below, continuously culms.
[0011]
Further, as shown in FIG. 3, the transmission (22) for driving the traveling crawler (2) includes a pair of first hydraulic pump (23) and a first hydraulic motor (24), and a hydraulic pressure for traveling main transmission. Turning that forms a hydraulic continuously variable transmission mechanism for turning by including a straight HST (25) that forms a continuously variable transmission mechanism, a pair of second hydraulic pump (26), and a second hydraulic motor (27) HST (28), and the output shaft (21a) of the engine (21) is connected to the input shafts (29a) and (29b) of the first and second hydraulic pumps (23) and (26) with the transmission belt (30a) ( 30b) and the hydraulic pumps (23) and (26) are driven.
[0012]
Further, the drive wheels (34) of the left and right traveling crawler (2) are interlockedly connected to the output shaft (31) of the first hydraulic motor (24) via the subtransmission mechanism (32) and the differential mechanism (33). The differential mechanism (33) has a pair of symmetrical planetary gear mechanisms (35) (35), and each planetary gear mechanism (35) includes one sun gear (36) and the sun gear ( 36) three planetary gears (37) meshing with the outer periphery of the
[0013]
The planetary gear (37) is rotatably supported by the carrier (41) of the carrier shaft (40) coaxial with the sun gear shaft (39), and the left and right sun gears (36) (36) are sandwiched between the left and right carriers. The ring gear (38) has an inner tooth (38a) that meshes with each planetary gear (37) and is arranged on the same axis as the sun gear shaft (39), so that the carrier shaft (40 The carrier shaft (40) is extended to form an axle to support the drive wheel (34).
[0014]
The straight traveling HST (25) controls the forward and reverse rotation and the rotational speed of the first hydraulic motor (24) by adjusting the angle change of the rotary swash plate of the first hydraulic pump (23). The rotational output of the motor (24) is fixed to the sun gear shaft (39) from the transmission gear (42) of the output shaft (31) via the gears (43) (44) (45) and the auxiliary transmission mechanism (32). The sun gear (36) is rotated by being transmitted to the center gear (46). The sub-transmission mechanism (32) includes a sub-transmission shaft (47) having the gear (44) and a parking brake shaft (49) having a gear (48) meshing with the center gear (46) via the gear (45). ), And a pair of low speed gears (50) (51), medium speed gears (52) (53), and high speed gears (54) between the auxiliary transmission shaft (47) and the brake shaft (49). (48) is provided, and the sub-shift is switched between low speed, medium speed, and high speed by the sliding operation of the low and medium speed slider (55) and the high speed slider (56). There is neutrality between low speed and medium speed and between medium speed and high speed. In addition, a parking brake (57) is provided on the brake shaft (49), and gears (59) (60) and a one-way clutch (61) are provided on a cutting PTO shaft (58) that transmits rotational force to the cutting portion (8). The sub-transmission shaft (47) is coupled to the cutting part (8) at the vehicle speed synchronization speed.
[0015]
As described above, the driving force from the first hydraulic motor (24) transmitted to the sun gear shaft (39) via the center gear (46) is transmitted to the left and right carrier shafts (40) via the left and right planetary gear mechanisms (35). ) And the rotation transmitted to the left and right carrier shafts (40) to the left and right drive wheels (34), respectively, to drive the left and right traveling crawler (2).
[0016]
Further, the turning HST (28) controls the forward / reverse rotation and the rotational speed of the second hydraulic motor (27) by adjusting the angle change of the rotary swash plate of the second hydraulic pump (26). A brake shaft (63) having a brake (62), a clutch shaft (65) having a steering output clutch (64), and left and right input gears that are always meshed with the external teeth (38b) of the left and right ring gear (38). 66) (67), the clutch shaft (65) is connected to the output shaft (68) of the second hydraulic motor (27) via the brake shaft (63) and the steering output clutch (64), and the clutch shaft The right input gear (67) is coupled to (65) via the forward rotation gear (69), and the left input gear (66) is coupled to the clutch shaft (65) via the forward rotation gear (69) and the reverse rotation gear (70). ). Then, the brake (62) is turned on and the clutch (64) is turned off by the neutral of the auxiliary transmission sliders (55) and (56), while the brake (62) is turned off and the clutch is turned off at the time of the auxiliary transmission other than the neutral. (64) is turned on, the rotational force of the motor (27) is transmitted to the external teeth (38b) of the right ring gear (38) via the forward rotation gear (69), and the external teeth (38b) of the left ring gear (38) ) Is transmitted to the rotation of the motor (27) via the forward rotation gear (69) and the reverse rotation gear (70), and when the second hydraulic motor (27) rotates forward (reverse rotation), the left ring gear (38 ) In the reverse direction (forward rotation) and the right ring gear (38) in the forward direction (reverse rotation).
[0017]
Thus, when the first hydraulic motor (24) for straight running is driven in a state where the second hydraulic motor (27) for turning is stopped and the left and right ring gears (38) are stationary and fixed, the first hydraulic motor ( The rotational output from 24) is transmitted from the center gear (46) to the left and right sun gears (36) at the same rotational speed, and the left and right traveling crawlers are transmitted via the planetary gear (37) and carrier (41) of the left and right planetary gear mechanism (35). (2) is driven at the same rotational speed in the same rotational direction on the left and right, and the machine body travels straight forward and backward. On the other hand, when the second hydraulic motor (27) for rotation is driven to rotate in the forward / reverse direction with the first hydraulic motor (24) for rectilinear movement stopped and the left and right sun gears (36) stationary and fixed, the left planet The gear mechanism (35) rotates forward or backward, and the right planetary gear mechanism (35) rotates backward or forward, driving the left and right traveling crawler (2) in the reverse direction and turning the aircraft to the left or right. Further, by driving the second hydraulic motor (27) for turning while driving the first hydraulic motor (24) for straight traveling, the aircraft turns left and right to correct the course. The turning radius is determined by the output rotational speed of the second hydraulic motor (27).
[0018]
Further, as shown in FIGS. 2 and 4 to 13, a steering column (71) is vertically fixed on the upper surface of the front portion of the driving operation portion (18), and a steering handle ( 19) is provided so as to be rotatable about the vertical axis, a side column (72) is provided on the left side of the operating portion (18), a transmission (22) is provided below the side column (72), and a main transmission lever (73 ), An auxiliary transmission lever (74), a cutting clutch lever (75), a threshing clutch lever (76), and the like are provided on the side column (72). The steering column (71) is formed by molding an aluminum alloy casting, and is formed into a box shape by fastening with a plurality of bolts (77) in a split structure that can be divided into left and right.
[0019]
Further, a tilt base (78) is integrally formed on the steering column (71), and a tilt bracket (80) is rotatably supported on the tilt base (78) via a fulcrum bolt (79). The tilt bracket (80) is fixed by 81) so that the angle can be adjusted. The lower part of the shaft case (82) is integrally fixed to the tilt bracket (80), the shaft case (82) is extended above the upper surface cover (83) to be fixed to the upper surface of the column (71), and the shaft case (82) is disposed inside. The upper handle shaft (84) is rotatably supported, the steering handle (19) is fixed to the upper end of the upper handle shaft (84), and the handle (19) around the fulcrum bolt (79) is operated by the tilt lever (81). Is moved and adjusted in the front-rear direction to be supported at a fixed position, and the handle (19) mounting position is adjusted in the front-rear direction to be fixed at a position that is easy for the operator to operate.
[0020]
Further, the upper end side of the lower handle shaft (86) is connected to the lower end portion of the upper handle shaft (84) via a universal joint (85) so that the lower handle shaft (86) can be rotated to the upper portion of the steering column (71). The upper end of the steering input shaft (87) is rotatably supported on the upper part of the steering column (71), and the gear (88) of the lower handle shaft (86) and the sector gear of the steering input shaft (87) are supported. (89) is engaged to connect the shafts (86) and (87), and the steering input shaft (87) is extended in the vertical direction substantially at the center inside the steering column (71).
[0021]
Further, a bearing portion (90) is integrally formed on the left side surface of the steering column (71) in the middle of the vertical width, and one end portion of the transmission input shaft (91) is connected to the bearing portion (90) via a bolt (92). The shift input shaft (91) is pivotally supported in a cantilever manner so as to be rotatable, and the upper end of the input fulcrum shaft (94) is connected to the lower end of the steering input shaft (87) via a universal joint (93). The lower end side of the input fulcrum shaft (94) is rotatably supported on the transmission input shaft (91). Further, the steering input member (95) is fixed to the upper end side of the input fulcrum shaft (94), and the transmission input member (96) is held between the upper surface of the transmission input shaft (91) and the lower surface of the steering input member (95). The transmission input member (96) is rotatably attached around the input fulcrum shaft (94), and the input members (95) (96) are connected to the transmission input member (96) by linking bolts (97). And both ends of a kneading spring (98) provided on the speed change input shaft (91) are locked to the speed change input member (96), and the speed change input member (96) is moved to the straight forward neutral position by the spring (98). Support. In addition, by rotating the steering input shaft (87) forward and backward, the input members (95) and (96) are rotated forward and backward around the core line of the substantially vertical input shaft (87) against the spring (98). The input fulcrum shaft (94) and the input members (95) and (96) are tilted in the front-rear direction about the substantially horizontal input shaft (91) core line by forward and reverse rotation of the speed change input shaft (91). A universal joint (93) is attached to the intersection point where the vertical steering input shaft (87) core wire and the horizontal shifting input shaft (91) core wire intersect at right angles, and the steering input shaft ( 87) The input members (95) and (96) are rotated in the forward and reverse directions about the steering input shaft (87) about the core line by forward and reverse operations.
[0022]
Further, a main transmission shaft (99), which is a main transmission operation input portion from the side column (72), is rotatably supported on the lower front side of the steering column (71), and is horizontally mounted horizontally in the left-right direction. The left end of the transmission shaft (99) protrudes outward from the left side of the steering column (71), and the link (101) is connected to the intermediate shaft (100), which is a main transmission operation lateral transmission member provided below the side column (72). ) (102) and the main transmission shaft (99) are connected via a rod (104) with a length-adjusting turnbuckle (103) which is a length-adjustable main transmission operation longitudinal transmission member. Further, a fulcrum plate (106) is rotatably attached to the lever fulcrum shaft (105) inside the side column (72), and the base of the main transmission lever (73) is moved to the fulcrum plate (106) via the cylindrical shaft (107). The pivot shaft (100) is connected to the fulcrum plate (106) via the links (108) and (109), and the main transmission lever (73) is moved back and forth around the lever fulcrum shaft (105). The main transmission shaft (99) is rotated in the forward and reverse directions by a shifting operation that swings in the direction. The main transmission shaft (99) is connected to the transmission input shaft (91) via the rod-shaped main transmission member (110) and the upper and lower links (111) (112), and the main transmission shaft ( 99) The input members (95) and (96) are tilted back and forth about the center line of the transmission input shaft (91) by forward and reverse operations.
[0023]
Further, a cylindrical shaft-shaped steering output shaft (113) is rotatably attached to the main transmission shaft (99), the link-type steering output member (114) is fixed to the steering output shaft (113), and the rod An upper end portion of the shape steering coupling member (115) is connected to the steering input member (95) via a universal joint type steering input connecting portion (116), and a ball joint type steering output connecting portion (117) is connected. A steering mechanism (118) is configured to connect the lower end portion of the steering coupling member (115) to the steering output member (114) via the sway to change the traveling path.
[0024]
Further, a shift output shaft (119) is rotatably supported inside the steering column (71) above the steering output shaft (113) and substantially in parallel with the shaft (113), so that a link type shift output member (120 ) Is fixed to the speed change output shaft (119), and the upper end of the rod-type speed change coupling member (121) is connected to the speed change input member (96) via the universal joint type speed change input connecting portion (122). A transmission mechanism (124) for connecting the lower end portion of the transmission coupling member (121) to the transmission output member (120) via the joint-type transmission output connecting portion (123) and changing the traveling speed and switching between forward and backward travel. It is composed.
[0025]
Furthermore, the inner shift operation shaft (125) and the outer steering operation shaft (126) of the double shaft structure that can rotate with each other are connected to the bearing portion (127) at the center of the left and right width on the lower rear side of the steering column (71). The upper end of the speed change operation shaft (125) is connected to the speed change output shaft (119) via the ball joint shaft (128) and the speed change links (129) (130) which are adjustable in length. At the same time, the upper end portion of the steering operation shaft (126) is connected to the steering output shaft (113) via the ball joint shaft (131) and the steering links (132) (133) that are adjustable in length.
[0026]
The operation shafts (125) (126) are erected on the bottom of the steering column (71) substantially vertically on the same axis, and the upper ends of the operation shafts (125) (126) are located inside the steering column (71). The lower end of each operation shaft (125) (126) protrudes below the bottom surface of the steering column (71), and is connected to each output shaft (113) (119). The lower end side of each operation shaft (125) (126) is extended on the lower surface side of the step board (134) for boarding the worker, and the first trunnion (the main transmission operation input part of the straight traveling HST (25)) 135), the trunnion arm (136) is fixed, and the length adjustment with a turnbuckle (137), which is a main transmission operation transmission member whose length is adjustable between the steering column (71) and the straight traveling HST (25). A trunnion arm (136) is connected to a lower end portion of the speed change operation shaft (125), which is a main speed change operation output portion of the steering column (71), via a universal rod (138) and a link (139). ) To adjust the swash plate angle of the first hydraulic pump (23) to control the rotational speed of the first hydraulic motor (24) and to switch between forward and reverse, steplessly changing the running speed (vehicle speed) and before and after Switch the decimal. Further, the trunnion arm (141) is fixed to the second trunnion (140) which is the steering operation input part of the turning HST (28), and the length between the steering column (71) and the turning HST (28) is fixed. A steering operation shaft (steering operation output part) of the steering column (71) via a length adjustable rod (143) with a turnbuckle (142) which is an adjustable steering operation transmission member and a link (144). 126) The trunnion arm (141) is connected to the lower end portion, and the swash plate angle of the second hydraulic pump (26) is adjusted by forward / reverse operation of the second trunnion (140) to rotate the second hydraulic motor (27). Control and forward / reverse switching are performed to change the steering angle (turning radius) continuously and to change the left / right turning direction.
[0027]
Further, an accelerator lever (145) is provided on the right outer surface of the steering column (71) so as to be rotatable in the front-rear direction. Extending from below along the inside, manually adjusting the engine (21) rotation speed by the accelerator lever (145), and opening a maintenance window (147) on the rear surface of the steering column (71) The maintenance window (147) is closed by (148).
[0028]
Further, as shown in FIGS. 14 and 15, a phase adjusting hole (149) for loosely inserting and inserting the linkage bolt (97) is opened in the steering input member (95), and the steering input shaft (87) core wire is connected. A plurality of (three) screw holes (150) are provided on the same radiation centered, and the phase adjustment hole (149) is formed in a trapezoidal shape with the steering input shaft (87) side as the base centering on the radiation. Thus, when the steering handle (19) in the straight traveling position is rotated left and right, the speed change input member until the linkage bolt (97) fixed to the screw hole (150) contacts the edge of the phase adjustment hole (149). In a state in which (96) is fixed at a certain position by the kneading spring (98), only the steering input member (95) is rotated, and the traveling speed is maintained to be substantially constant, and the left and right are turned to correct the course. . When the linkage bolt (97) contacts the edge of the phase adjusting hole (149), the steering handle (19) is further rotated in the same direction, whereby the steering input member is connected by the linkage bolt (97). (95) and the speed change input member (96) both rotate against the spring (98) to reduce the traveling speed and correct the course, and turn determined by operating the steering handle (19). While the radius and the speed reduction amount change proportionally, the steering handle (19) is returned to the straight-ahead position, whereby the shift input member (96) is returned to the neutral position by the kneading spring (98). It automatically returns to the running speed. Further, by changing the connecting bolt (97) to each screw hole (150), the rotation angle of the steering input member (95) until the connecting bolt (97) contacts the edge of the phase adjusting hole (149) changes. When the steering handle (19) is operated, the deceleration start timing of the traveling speed can be adjusted, and when the steering handle (19) is supported linearly, the speed change input member (96) is shifted by the kneading spring (98). It is fixed to the input shaft (91) and prevents the shift input member (96) from floating due to mechanical vibration or the like, and prevents the running speed from decelerating due to the wobbling of the shift input member (96).
[0029]
Further, as shown in FIG. 16 to FIG. 20, the gear (88) forms a plurality of teeth (151) in an outer peripheral range of 270 degrees, and forms an outer peripheral range of 90 degrees in an arc (152). The total rotation angle of the handle (19) is set to 270 degrees, the angle of left steering rotation or right steering rotation is set to 135 degrees, and the steering handle (19) can be rotated easily with one hand. Form. Further, the sector gear (89) forms a plurality of teeth (153) in an outer peripheral range of 130 degrees, forms an outer peripheral range of 230 degrees in an arc cam (154), and teeth (151) of the gear (88) Are engaged with the teeth (153) of the sector gear (89), and when the maximum forward / reverse rotation of each gear (88) (89), the stoppers (155) on both ends of the arc (152) and the stoppers on both ends of the arc cam (154) ( 156) and restricting the rotation of the steering handle (19), and the steering input member (95) and the transmission input member (96) are set in a range of 65 degrees around the steering input shaft (87) core. A space for arranging the speed change input shaft (91) and the upper end of the main speed change member (110) on the plane on which each input member (95) rotates is secured by rotating forward or reverse, and on the speed change input shaft (91) core line Is provided with a steering input connecting portion (116) And a structure in which the input connecting portions (116) and (122) are separated by 90 degrees on the same circumference can be easily obtained, and the structure can be made compact and the design and assembly can be simplified. .
[0030]
A straight notch (157) is formed at the center of the circular arc cam (154) of the sector gear (89), and a detent shaft (158) is rotatably supported on the upper surface wall of the steering column (71). 158) The detent arm (159) is fixed to the lower end, the detent arm (159) is rotatably supported by the detent arm (159) via the roller shaft (160), and the arc cam (154) is detent-rolled. (161) is brought into contact, and the detent roller (161) is detachably engaged with the rectilinear notch (157) to support the steering handle (19) in the rectilinear position. The detent lever (162) is fixed to the upper end side of the detent shaft (158), and one end of a neutral spring (163) wound around the detent shaft (158) is locked to the detent lever (162) to 71) is brought into contact with the receiving plate (164) of the neutral spring (163), and the detent roller (161) is brought into elastic contact with the arc cam (154) and the straight notch (157) by the neutral spring (163). ing. Further, a microswitch type rectilinear sensor (165) that electrically detects the rectilinear position of the steering handle (19) by switching on and off is attached to the detent lever (162).
[0031]
When the main speed change lever (73) is neutral, the input members (95) (96) and 96 around the core of the steering input shaft (87) by the forward (reverse) operation of the steering handle (19). Each coupling member (115) (121) moves on a conical locus, and the output members (114) (120) and the output shafts (113) (119) are stopped.
[0032]
Further, by the forward (reverse) operation of tilting the main transmission lever (73) forward (rearward), the input members (95) (96) are tilted forward (rearward) around the core line of the speed change input shaft (91) and operated. While maintaining the state where the direction input connecting portion (116) is stopped at a certain position, the shift input connecting portion (122) is moved upward (downward), and the shift output member (120) is swung upward (downward). The transmission output shaft (119) is rotated forward (reverse), and the first hydraulic motor (24) is rotated forward (reverse) by switching the swash plate angle of the first hydraulic pump (23) of the straight traveling HST (25). 1 The left and right traveling crawler (2) is driven forward (reverse) by forward rotation (reverse rotation) of the output shaft (31) of the hydraulic motor (24). Further, the rotation speed of the output shaft (31) changes in proportion to the tilt angle of the main transmission lever (73), and the forward (reverse) speed of the traveling crawler (2) is steplessly changed.
[0033]
Further, under the condition that the main shift lever (73) is moved forward (rearward) and the forward (reverse) operation is performed, the steering handle (19) is rotated leftward (rightward) to thereby input the shift. The steering input member (95) rotates forward (reversely) about the steering input shaft (87) around the core line in a posture in which the steering input member (95) is tilted forward (rearward) around the axis (91), and the steering input connecting portion (116) is The steering output shaft (113) is normally rotated (reversed) by the downward (upward) swing of the steering output member (114), and the second hydraulic pump of the turning HST (28) ( 26) forward rotation (reverse rotation) of the second hydraulic motor (27) by switching the swash plate angle, and left rotation crawler (2) by forward rotation (reverse rotation) of the output shaft (68) of the second hydraulic motor (27). Is decelerated (accelerated) and the right traveling crawler (2) is accelerated (decelerated) to the left (right Direction) to pivot the body to correct the path to the left (right direction). Simultaneously with the course correcting operation, the shift input member (96) is tilted forward (rear) around the core line of the shift input shaft (91) by the leftward (rightward) rotation of the steering handle (19). The steering input shaft (87) rotates forward (reversely) around the core wire, the shift input connecting portion (122) moves downward (upward), and the shift output (120) swings downward (upward) to produce shift output. The shaft (119) is reversely rotated (forward rotation), and control for returning the straight traveling HST (25) to the neutral direction is performed to reduce the rotational speed of the output shaft (31), thereby reducing the traveling speed (vehicle speed). As described above, by the left / right steering operation of the steering handle (19) during traveling, the turning radius (angle) for correcting the course is proportional to the rotation angle of the steering handle (19), and the traveling speed is reduced. By changing the amount and rotating the steering handle (19) largely, the speed difference between the left and right traveling crawlers (2) is increased to reduce the turning radius, and at the same time, the amount of deceleration of the traveling speed increases and the vehicle speed decreases. At the time of forward movement and backward movement, the movement of the turning input connecting portion (116) is reversed with respect to the rotation of the steering handle (19), and the steering handle (19) is rotated in both forward and backward movements. By adjusting the operation direction and the turning direction of the aircraft and rotating the round steering handle (19) to rotate, for example, a course correction and a direction change with a driving feeling similar to that of a four-wheeled vehicle such as a tractor or a rice transplanter. Cormorant.
[0034]
19 and 20 show the relationship between the turning angle of the steering handle (19) and the speed of the left and right traveling crawler (2) when the aircraft is turning left and right. The turning angle of the handle (19) is large. As the speed difference between the left and right traveling crawlers (2) increases, the body center speed, which is the average speed of the left and right traveling crawlers (2), is also reduced according to the traveling speed (high speed, standard, low speed) state. When the steering handle (19) in the straight traveling position is rotated about 15 degrees leftward (rightward), the linkage bolt (97) moves in the phase adjusting hole (149), and the speed is changed by the kneading spring (98). The input member (96) is maintained at the same position as the straight travel, and left by the steering output that causes the second hydraulic motor (27) to rotate forward (reverse) by the second hydraulic pump (26) of the turning HST (28). Turn in the direction (right direction) and correct the course to match the curve of the uncut grain row. At this time, the deceleration amount of the traveling crawler (2) inside the turning and the acceleration amount of the traveling crawler (2) outside the turning become substantially equal, and the body center speed is kept at substantially the same speed as the straight traveling. Further, when the steering handle (19) is rotated by 15 degrees or more from the straight traveling position, the speed change input member (96) decelerates in both the left turn and the right turn against the kneading spring (98). 1 The traveling shift output of the hydraulic pump (23) and the motor (24) is decelerated, the left and right traveling crawlers (2) are rotationally driven in the same direction to advance (or reverse), and the traveling speed difference between the left and right traveling crawlers (2) A brake turn operation that turns leftward (rightward) is performed, and when it is removed from the uncut grain culm (crop) row, the route is returned to the original row or moved to the next row. Further, when the steering handle (19) is rotated about 135 degrees, the center speed of the aircraft is reduced to about one fourth of the straight traveling speed, the traveling crawler (2) inside the turning is driven in reverse, and the traveling crawler inside the turning is driven. A spin turn operation is performed in which the aircraft turns around (2), and the aircraft is turned 180 degrees by shifting the lateral width of the left and right traveling crawler (2) in the turning direction. Rotate the steering handle (19) in the range of degrees to turn left or right, and turn to the uncut grain culm (crop) row in the rotation range of the handle (19) left and right of 15 degrees around the straight position In addition to maintaining the traveling speed while moving straight, the alignment course that moves along the road is changed and the body is turned on the field headland by turning the handle (19) left and right from the straight position to the next work. The spin turn operation to move and automatically decelerated to about a quarter of the speed of straight running performed.
[0035]
Further, when the sub-shift is maintained at a standard speed (1.5 meters per second) and the steering handle (19) is rotated by 90 degrees, the main shift output is set to a high speed and two-thirds by operating the main shift lever (73). Even if it is changed to 1/3, only the turning speed (aircraft center speed) is changed in a state where the turning radius of the airframe is kept substantially constant. Further, the first hydraulic pump (23) and the first hydraulic motor (24) are maintained in a straight traveling state within a set range of the linkage bolt (97) and the phase adjusting hole (149) with reference to the straight traveling position, and the crop row or Even if a steering operation is carried out along the dredger, etc., the running speed is prevented from changing unevenly, and the course can be corrected during farm work while maintaining the same running speed. It is possible to perform an appropriate steering operation by substantially matching the traveling operation of the vehicle. Further, the sub-shift lever (74) for switching the shift reference value of the main shift lever (73) changes the turning radius from a small diameter to a large diameter in proportion to the low speed, standard and high speed switching of the sub-shift operation, and the first hydraulic pump ( 23) and the reduction ratio between the motor (24) and the traveling crawler (2) and the reduction ratio between the second hydraulic pump (26) and the motor (27) and the traveling crawler (2), or necessary for the spin turn operation. While ensuring the driving force required for small radius turning, and operating the main speed change lever (73) at the same sub-shift operation position, the running speed during turning is changed with the turning radius kept substantially constant. Thus, the driving operation can be performed according to the skill level of the worker, and the mobility and the driving operability are improved.
[0036]
As described above, the differential mechanism (33) that transmits the driving force of the engine (21) to the left and right traveling crawler (2), and the straight traveling HST (25) that continuously changes the driving speed of the left and right traveling crawler (2). And a steering input shaft (87) that is rotated by a steering operation tool (19) in a mobile agricultural machine provided with a turning HST (28) that changes the difference in driving speed between the left and right traveling crawlers (2) steplessly, A transmission input shaft (91) rotated by a transmission operation tool (73), a transmission mechanism (124) for connecting the transmission input shaft (91) to the transmission member (25), and a steering input shaft (87) as a steering member. The steering mechanism (118) connected to (28) is provided, and the steering mechanism (118) is configured to change the steering amount in proportion to the operation amount of the transmission mechanism (124). Steering column (7 ) To the main shift operation input section (99) from the side column (72) on the side of the driver's seat (20) and the straight travel HST (25) together with the steering operation output section (126) to the turning HST (28). The main shift operation output section (125) is provided so that the main shift operation is not directly transmitted to the straight traveling HST (25), but is input to the steering column (71) and transmitted to the straight traveling HST (25). By changing the steering operation amount in proportion to the main shift operation amount input by the internal mechanism of the steering column (71) and transmitting the steering operation to the turning HST (28), the steering operation amount is controlled by the high-speed side traveling shift. The direction amount is automatically increased and the steering amount is automatically reduced by the low speed side shifting, and the left and right traveling crawler (2) is turned by a certain amount of operation of the steering handle (19) regardless of the traveling speed. Maintaining the size substantially constant, and configured to easily perform such route modifications be along the body such as the changes and the crop string in farming running speed.
[0037]
As shown in FIGS. 21 to 41, the body-length steering column (71) provided with the steering handle (19) has left and right chassis frames (3a) extending to the lower left and right sides of the driving operation section (18). ) Is fixedly supported between the front end side of the driving unit (18) between the steering column (71) and the driver's seat (20) and on the left and right sides of the lower part of the steering column (71). The step plate (134) is stretched, and the operator's feet are placed on both the left and right sides of the steering column (71) to reduce the front-rear length of the driving operation portion (18) and the overall length of the aircraft. It is configured.
[0038]
Further, the width of the left step plate (134) of the steering column (71) is made wider than the width of the right step plate (134), and the operator is placed between the steering column (71) and the side column (72). The left leg of the steering column (71) and the step plate (134) on the left side of the steering column (134) are extended to the cutting part (8) side to raise the cutting part (8) to the highest position. In order to prevent the right side cover or the like of the cutting portion (8) from interfering with the step plate (134), the front portion of the step plate (134) is formed to be inclined.
[0039]
The step plate (134) is divided into a front left and right step portions (134a) (134b) on both the left and right sides of the steering column (71) and a step body (134c) on the rear side of the steering column (71). The front left and right step portions (134a) and (134b) are always fixed to the chassis frame (3a), the step body (134c) is detachably attached to the chassis frame (3a), and the step body (134c) is attached. By removing it, the structure on the lower surface side can be easily maintained.
[0040]
A fuel tank (200) is disposed on the lower surface side of the step plate (134), the fuel tank (200) is fixedly supported on the chassis frame (3a), and the steering column (71) and the fuel tank (200) In the meantime, the shift operation shaft (125) and the steering operation shaft (126) are projected from the steering column (71), and the rods (138) and (143) are placed between the step plate (134) and the fuel tank (200). And a turnbuckle (137) (142) is provided between the step plate (134) and the fuel tank (200), so that the speed change operation shaft (125), the steering operation shaft (126) and The fuel tank (200) prevents mud and dust from adhering to the rods (138) (143) and turnbuckles (137) (142), and the main speed change operation and steering operation. It is configured to reduce the factors that reduce the transfer accuracy.
[0041]
Further, the main transmission shaft (99) protrudes from the steering column (71) into an excess space on the lower surface side of the front left step portion (134a) formed by raising the front portion of the step plate (134). The main transmission shaft (99) is provided between the step plate (134) and the chassis frame (3a) to protect the main transmission shaft (99) from external impacts and the like. It is configured to reduce factors that lower the transmission accuracy of operations.
[0042]
The side column (72) is provided with a main transmission lever (73), an auxiliary transmission lever (74), a harvesting clutch lever (75), a lever groove of the threshing clutch lever (76), various switches, a display lamp, a display motor, and the like. Support frame structure of the side column (72) for fixing and supporting the panel (72a) and the side panel (72a) on the upper surface side and mounting the lever fulcrum shafts of the levers (73) (74) (75) (76) (201) and a side wall (202) extending to the driver seat (20) side of the side column (72), and a main transmission lever (73), an auxiliary transmission lever (74) and the like are provided to perform a main transmission operation. A side column (72) is arranged on the left side of the driving operation unit (18), and below the side column (72), that is, a side panel. The transmission (22) for mounting each HST (25) (28) is disposed below the (72a), and the support frame structure (201) is fixed to the chassis frame (3a) for supporting the steering column (71). Fixed support.
[0043]
Further, an HST mounting seat (204) for mounting the turning HST (28) mounted on the front upper portion of the mission (22) and the straight HST (25) mounted on the rear upper surface of the mission (22) on the mission (22). And a predetermined gap is provided between the turning HST (28) and the straight traveling HST (25), and each HST (25) (28) is transmitted on the inner surface of the transmission belt (30a) (30b). The side column is also connected to the support seat (205) which is integrally connected to (22) and is connected to the upper surface of the HST mounting seat (204) on the upper surface side of one HST (25). The support frame structure (201) (72) is fixedly supported.
[0044]
The side wall (202) of the side column (72) is formed of a lid plate that can be freely opened and closed, and maintenance of the side column internal mechanism and each HST (25) (28) and transmission (22) can be easily performed from the driver seat (20). It is configured to do so. A cover (203) extending forward from the front edge of the side wall (202) and extending to the left side of the operator's left foot is provided.
[0045]
As described above, the main transmission lever (73) is rotatably supported by the lever fulcrum shaft (105) attached to the support frame structure (201) of the side column (72) and the lever fulcrum shaft (105), and The fulcrum plate (106) for pivotally mounting the base of the main transmission lever (73) in the left-right direction via the cylindrical shaft (107) and the fulcrum plate (106) via the links (109) (108) are connected. Main transmission operation formed by the intermediate shaft (100), the links (102) (101) for connecting the intermediate shaft (100) to the main transmission shaft (99) and the rod (104) with a length adjusting turnbuckle (103). The main transmission shaft (99) is connected by a transmission path, and the main transmission operation of the main transmission lever (73) is transmitted to the main transmission shaft (99). The side edge The bearing is supported by a ball joint (206a) fixed to a support seat (205) integrally connected to the upper surface of the HST mounting seat (204) below the columnar (72), and the main transmission operation output side of the intermediate shaft (100) The end portion is supported by a ball joint (206b) that is fixed to the chassis frame (3a) on the lower surface side of the step plate (134) on the right side of the side column (72), and the intermediate shaft (100) has a different transmission (22 ) And the chassis frame (3a) are properly pivoted in the left-right direction of the fuselage, and the main shift operation is performed via the middle shaft (100) and the rod (104) outside the right side of the side column (72). 71) is transmitted to the main transmission shaft (99). In addition, friction plates (213) and (214) that hold the fulcrum plate (106) are provided on the lever fulcrum shaft (105), and the main transmission lever (73) is operated and positioned. The detent force is adjusted by loosely tightening the nut (215) and adjusting the spring (216) force.
[0046]
Further, a sub shift shifter shaft (207), which is a sub shift operation input portion, is provided on the front side of the transmission (22), and a lever fulcrum shaft (208) attached to the support frame structure (201) of the side column (72). ), The cylinder shaft (209) at the base of the auxiliary transmission shaft (74) is rotatably fitted, and the auxiliary transmission arm (210) is integrally extended from the cylindrical shaft (209) to the upper front side of the transmission (22). The sub-transmission arm (210) is connected to the sub-transmission shifter shaft (207) via the substantially vertical rod (211) and link (212), and the sub-transmission lever (74) is rotated around the lever fulcrum shaft (208). A shift operation for swinging back and forth is transmitted to the auxiliary transmission shifter shaft (207) on the front side of the mission (22), and the auxiliary transmission shifter shaft (207) is rotated forward and backward to switch the auxiliary transmission. is doing.
[0047]
Further, the driving operation unit (18) includes a parking brake pedal (217) and a parking brake lever (218), and the parking brake pedal (217) is disposed between the steering column (71) and the side column (72). The left step portion (134a) is disposed on the upper surface side, and the parking brake lever (218) is disposed on the right front portion of the driving operation portion (18). The pedal fulcrum shaft (219) is horizontally mounted in the left-right direction of the machine body, and the pedal fulcrum shaft (219) is rotatably attached to the cylinder shaft (220) fixedly supported on the chassis frame (3a). The pedal arm (221) base is engaged with the outer pedal fulcrum shaft (219), and the pedal arm (221) is extended forward at the left end of the step plate (134), so that the front left step Flop unit (134a) above the pedal arm (221) to fix the parking brake pedal (217) at the tip. On the other hand, the lever fulcrum shaft (222) is rotatably attached to the cylindrical shaft (223) fixedly supported on the front end of the right chassis frame (3a), and the parking brake lever (218) base is engaged with the lever fulcrum shaft (222). Let it pivot.
[0048]
Then, the pedal fulcrum shaft (219) is inserted into the side column (72) from a notch (224) formed in the lower rear edge of the side wall (202), and the pedal fulcrum shaft (219) inside the side column (72) is inserted. ) An output arm (225) which is a parking brake operation output unit is provided at the shaft end. The output arm (225) interlocked with the parking brake arm (221) is connected to the output arm (225) via an operation wire (226) and a link (229). The lever fulcrum shaft (222) is connected to transmit the parking brake operation by depressing the parking brake pedal (217) and the parking brake operation by tilting the parking brake lever (218) to the output arm (223).
[0049]
Also, a return spring (228) force is urged to the output arm (223), and a check operation plate (which is rotatably supported by a support shaft (229) attached to the support frame structure (201) of the side column (72)). 230), the output arm (223) is connected to the check operation plate (230) via a link or a connecting member (231) of a rod with a turnbuckle, and the left side of the mission (22) as a parking brake operation input unit The parking brake shifter (232) is connected with a check operation plate (230) via an operation wire (233), and parking brake operation by depressing the parking brake pedal (217) and parking by tilting the parking brake lever (218) are performed. The brake operation is transmitted from the output arm (223) to the parking brake shifter (232), and the parking brake (57) is It is configured to movement. In the figure, reference numeral (237) denotes an engagement rod for holding the parking brake pedal (217) in the depressed position.
[0050]
Also provided is a check mechanism (233) for holding the main transmission lever (73) in the neutral position (when already in the neutral position) or returning (when in a position other than neutral) when the parking brake (57) is applied. The check mechanism (233) includes a check roller (234), a check plate (236) having a slot (235) for fitting the check roller (234), and the check operation plate (230). The check roller (234) is attached to the fulcrum plate (106) of the main transmission operation system, the check plate (236) is attached to the check operation plate (230) incorporated in the parking brake operation system, and the parking brake (57) is not applied. When the check roller (234) is positioned inside the large portion (235a) of the slot (235) to allow main shift operation, the check roller when the main shift is neutral when the parking brake (57) is applied (234) By moving the end of the small portion (235b) of the slot (235) to a position, the movement from the neutral position of the check roller (234) is regulated or the neutral position after the return to the neutral position of the check roller (234) It is configured to restrict movement from
[0051]
The operation wire (233) for transmitting the parking brake operation from the side column (72) to the parking brake (57) portion of the mission (22) is between the straight HST (25) and the turning HST (28). And is stretched between the check operation plate (230) and the parking brake shifter (232). In the gap between the straight HST (25) and the turning HST (28) of the HST mounting seat (204). A hole (238) is opened at a corresponding position, the operation wire (233) is passed from the inner surface side of the HST mounting seat (204) to the left side surface of the mission (22), and inside the transmission belt (30a) (30b). The operation wire (233) is guided to the parking brake shifter (232) along the left side of the mission (22).
[0052]
Further, a coaxial tension arm fulcrum (241) of the tension rollers (239) and (240) of the transmission belts (30a) and (30b) is attached to the HST mounting seat (204).
[0053]
Further, the chassis frame (3) (3a), a fixed object to be fixed to the chassis frame (3) (3a) by welding, and the side column (72) were rotated about the axle (242) of the transmission (22). It is arranged off the trajectory and is configured so that it can be easily checked during maintenance assembly and development. In addition, the fastening of the support frame structure (201) of the side column (72) connected to the mission (22) uses a long hole (243) so as to cope with the positional deviation.
[0054]
The main shift operation input unit from the side column (72) on the side of the driver seat (20) together with the steering operation output unit (126) to the turning HST (28) on the steering column (71) in front of the driver seat (20) (99) and a mobile agricultural machine provided with a main shift operation output unit (125) to the straight traveling HST (25), the transmission (22) on which each HST (25) (28) is mounted is connected to the side column (72). By placing the steering column (71), the side column (72), the turning HST (28), and the transmission (22) carrying the straight traveling HST (25), the three members are closer to each other. Then, the transmission distance of the main transmission operation and the steering operation is shortened, and the transmission accuracy of these operations is increased, that is, the main transmission operation and the steering operation accuracy are increased. In addition, the transmission (22) and the dust cover of the transmission section prevent mud and dust from adhering to the transmission member of the main shift operation and steering operation and other side column internal mechanisms. Reduce factors to lower. Furthermore, a check mechanism (233) is provided for holding or returning the main transmission lever (73) of the side column (72) to the neutral position when the parking brake (57) provided in the mission (22) is applied. This prevents erroneous operation of the main transmission operation section such as the main transmission lever (73) of the side column (72) during parking stop, and ensures that the main transmission operation section is securely held in the neutral position when parking is stopped. Is transmitted to the steering column (71) to prevent the internal mechanism of the steering column from being damaged or the vehicle from running.
[0055]
Further, by providing the check mechanism (233) inside the side column (72), it is possible to prevent the steering column internal mechanism from being further complicated. In addition, like the main transmission operation and steering operation transmission member, the check mechanism (233) also prevents mud and dust from adhering with the mission (22) and the dust cover of the mission section, and the check mechanism (233) malfunctions. To prevent.
[0056]
In addition, a parking brake operation output part (225) is provided inside the side column (72), and parking brake operation is transmitted from the output part (225) to a parking brake operation input part (232) provided on the side of the mission (22). By stretching the brake operation wire (233) between the parking brake operation output unit (225) and the input unit (232) through between the turning HST (28) and the straight traveling HST (25), The parking brake operation wire (233) is stretched without meandering so as to shorten the transmission distance of the parking brake operation, make the parking brake operation system more compact and increase the operation transmission accuracy, that is, increase the parking brake operation accuracy. .
[0057]
Further, a stepping operation of a parking brake pedal (217) provided between the steering column (71) and the side column (72) is given to the parking brake operation output unit (225), thereby the steering column (71) and the side column. A parking brake operation part that is excellent in operability is formed while making the space compact by effectively utilizing the space on which one foot on the side column (72) side of the operator is put and placed between (72). Alternatively, a parking brake that can be operated even by an operator who has descended from the airframe by giving a tilting operation of a parking brake lever (218) provided outside the airframe opposite to the side column (72) to the parking brake operation output section (225). An operation unit is formed. Alternatively, by providing two parking brake operation systems, that is, the parking brake pedal (217) and the parking brake lever (218), the parking brake operation can be operated either on the aircraft or off the aircraft. Forming part.
[0058]
Further, by forming the side wall (202) on the driver seat (20) side of the side column (72) so that it can be opened and closed, the steering operation of the turning HST (28) and the straight traveling HST (25) on the upper side of the mission (22). Maintenance of the input unit (140), the main transmission operation input unit (135), the main transmission operation unit, the parking brake operation system, and other side column internal mechanisms can be easily performed from the driver seat (20) side, and these are always in an appropriate state. The transmission accuracy of the main shift operation, the steering operation, and the parking brake operation is increased, that is, the main shift operation, the steering operation, and the parking brake operation accuracy are increased.
[0059]
The main shift operation input unit from the side column (72) on the side of the driver seat (20) together with the steering operation output unit (126) to the turning HST (28) on the steering column (71) in front of the driver seat (20) (99) and a mobile agricultural machine provided with a main shift operation output unit (125) to the straight traveling HST (25), the transmission (22) on which each HST (25) (28) is mounted is connected to the side column (72). It arranges below. Alternatively, the main shift operation input from the side column (72) on the side of the driver's seat (20) together with the steering operation output unit (126) to the turning HST (28) is input to the steering column (71) in front of the driver's seat (20). In the mobile agricultural machine provided with the main shift operation output unit (125) to the section (99) and the straight traveling HST (25), the side column is disposed above the mission (22) on which the HST (25) (28) is mounted. By arranging (71), the three of the steering column (71), the side column (72), the turning HST (28), and the transmission (22) equipped with the straight traveling HST (25) are brought closer than before. It is arranged to shorten the transmission distance of the main transmission operation and the steering operation, and increase the transmission accuracy of these operations, that is, the main transmission operation and the steering operation accuracy. In addition, the transmission (22) and the dust cover of the transmission section prevent mud and dust from adhering to the main transmission operation and steering operation transmission members and other side column internal mechanisms, thereby improving the transmission accuracy of the main transmission operation and steering operation. Reduce factors to lower.
[0060]
Further, by connecting the HST mounting seat (204) to the mission (22) and the support frame (201) of the side column (72), the operation part (73) for the main shift and the operated part (135) are integrated. It is supported by a structure to increase the support rigidity of the main transmission operation system and increase the transmission accuracy of the main transmission operation, that is, increase the main transmission operation accuracy. The side column (72) is also connected to the chassis frame (3a) supporting the steering column (71), so that the steering column (71), the side column (72), the turning HST (28), and the straight traveling Three of the missions (22) equipped with the HST (25) are integrally supported to increase the support rigidity of both the main transmission operation system and the steering operation system, and increase the transmission accuracy of the main transmission operation and the steering operation. That is, the accuracy of the main speed change operation and the steering operation is increased.
[0061]
Further, the auxiliary transmission operation input section (207) is provided on the front side of the mission (22), and the auxiliary transmission operation system is transmitted by transmitting the auxiliary transmission operation from the side column (72) on the front side of the mission (22). It is possible to prevent the formation of a preferable main transmission operation system and steering operation system for increasing the transmission accuracy of the main transmission operation and the steering operation. On the other hand, transmission of the sub-shift operation from the side column (72) to the sub-shift operation input unit (207) of the mission (22) can be performed linearly (vertically or substantially vertically), and the sub-shift operation can be performed in the same manner as the main shift. Since the operating portion (74) and the operated portion (207) are also supported by an integral structure, the transmission accuracy of the auxiliary transmission operation is increased, that is, the auxiliary transmission operation accuracy is improved and the auxiliary transmission operation system is made compact. Plans and, in turn, simplifies the internal structure of the side column.
[0062]
Further, by forming the side wall of the side column (92) on the side of the driver's seat (20) so as to be freely opened and closed, the steering operation input units (the turning HST (28) on the upper side of the mission (22) and the straight traveling HST (25)) ( 140), the main transmission operation input section (135), the main transmission operation section, the auxiliary transmission operation system, and other side column internal mechanisms can be easily maintained from the side of the driver seat (20). The transmission accuracy of the shift operation, the steering operation, and the auxiliary transmission operation is increased, that is, the accuracy of the main transmission operation, the steering operation, and the auxiliary transmission operation is increased. Further, the length adjustment of the steering operation transmission member (143) and the main transmission operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed. 28) and the steering operation input unit (140) and the main transmission operation input unit (135) of the straight traveling HST (25) can be properly performed while visually confirming the state, and the main transmission operation system and the steering operation system are properly controlled. It is formed and can be easily maintained, and these are always kept in an appropriate state to increase the transmission accuracy of the main transmission operation and the steering operation, that is, the accuracy of the main transmission operation, the steering operation, and the auxiliary transmission operation.
[0063]
The main shift operation input unit from the side column (72) on the side of the driver seat (20) together with the steering operation output unit (126) to the turning HST (28) on the steering column (71) in front of the driver seat (20) (99) and a mobile agricultural machine provided with a main shift operation output unit (125) to the straight traveling HST (25), the transmission (22) on which each HST (25) (28) is mounted is connected to the side column (72). And a main transmission operation lateral transmission member (100) that forms a main transmission operation transmission path in the left-right direction of the machine body and a main transmission operation vertical length that is adjustable in length that forms a main transmission operation transmission path in the longitudinal direction of the machine body. A transmission member (104) is provided on the outer side of the driver's seat (20) side of the side column (72) from the side column (72) via the main transmission operation lateral transmission member (100) and the main transmission operation longitudinal transmission member (104). Main gear shifting Is transmitted to the main shift operation input section (99) of the steering column (71), thereby mounting the steering column (71), the side column (72), the turning HST (28), and the straight traveling HST (25). The three of (22) are placed closer to each other than before, the transmission distance of the main transmission operation and the steering operation is shortened, and the transmission accuracy of these operations is increased, that is, the main transmission operation and the steering operation accuracy are increased. In addition, the transmission (22) and the dust cover of the transmission section prevent mud and dust from adhering to the main transmission operation and steering operation transmission members and other side column internal mechanisms, thereby improving the transmission accuracy of the main transmission operation and steering operation. Reduce factors to lower. Further, the main transmission operation is transmitted from the side column (72) to the steering column (71) in the same direction as the operation direction, thereby increasing the transmission accuracy of the main transmission operation, that is, increasing the main transmission operation accuracy. In addition, maintenance of the main transmission operation transmission system from the side column (72) to the steering column (71) can be easily performed from the driver seat (20) side, and this is always maintained in an appropriate state to improve transmission accuracy of the main transmission operation. That is, the main shift operation accuracy is increased.
[0064]
Further, the support frame (201) of the side column (72) is connected to the HST mounting seat (204) to the mission (22), and the input side end of the main transmission operation lateral transmission member (100) is connected to the HST mounting seat. (204), and the output side end of the main transmission operation lateral transmission member (100) is supported by the chassis frame (3a), thereby integrating the main transmission operation section (73) and the operated section (135). The main transmission operation lateral transmission member (100) which is supported by the structure of FIG. 5 and serves as a fulcrum part of the main transmission operation system from the side column (72) to the steering column (71) is also connected to the main transmission operation unit (73). It is supported by an integral structure that supports the operation portion (135), and the support rigidity of the main transmission operation system is increased, and the transmission accuracy of the main transmission operation is increased, that is, the main transmission operation accuracy is increased. The side column (72) is also connected to the chassis frame (3a) supporting the steering column (71), so that the steering column (71), the side column (72), the turning HST (28), and the straight traveling Three of the missions (22) equipped with the HST (25) are integrally supported to increase the support rigidity of both the main transmission operation system and the steering operation system, and increase the transmission accuracy of the main transmission operation and the steering operation. That is, the accuracy of the main speed change operation and the steering operation is increased.
[0065]
Further, the steering operation transmission member (143) having an adjustable length and forming the steering operation transmission path between the steering operation output section (126) of the steering column (71) and the turning HST (28) and the steering. An adjustable main transmission operation transmission member (138) that forms a main transmission operation transmission path between the main transmission operation output section (125) of the column (71) and the straight traveling HST (25) is provided for driving. The main transmission operation longitudinal transmission member (104), the steering operation transmission member (143), and the main transmission operation transmission member (138) are provided on the lower surface side of the detachable step plate (134c) that is stretched forward and under the seat (20). The side column (72) is provided by arranging the length adjusting portions (103) (142) (137) of the transmission members (104) (143) (138) on the lower surface side of the step plate (134c). From Steering operation transmission member (43) and main transmission operation transmission from main steering operation transmission member (104) to steering column (71) and steering column (71) to turning HST (28) and straight traveling HST (25) The length of the member (138) can be easily adjusted, the main transmission operation system and the steering operation system can be properly formed, and maintenance can be easily performed. Transmission accuracy, that is, main shift operation and steering operation accuracy.
[0066]
Further, by forming the side wall (202) on the driver seat (20) side of the side column (72) so that it can be opened and closed, the steering operation of the turning HST (28) and the straight traveling HST (25) on the upper side of the mission (22). Maintenance of the input unit (140), the main transmission operation input unit (135), the main transmission operation unit, and other side column internal mechanisms can be easily performed from the driver seat (20) side, and these are always kept in an appropriate state to maintain the main transmission. The transmission accuracy of the operation and the steering operation is increased, that is, the main shift operation and the steering operation accuracy are increased. Further, the length adjustment of the steering operation transmission member (143) and the main transmission operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed. ) And the steering operation input unit (140) and the main transmission operation input unit (135) of the straight traveling HST (25) can be appropriately performed while visually confirming, and the main transmission operation system and the steering operation system are appropriately formed. In addition, the maintenance can be easily performed, and these are always kept in an appropriate state to increase the transmission accuracy of the main shift operation and the steering operation, that is, the main shift operation and the steering operation accuracy.
[0067]
In the combine in which the driving operation part (18) is arranged on the side of the lifting and lowering cutting part (8), the front part of the step plate (134) of the driving operation part (18) is raised in an inclined manner to the highest position. The stepped plate (134) is prevented from interfering with the side portion of the raised mowing unit (8) on the driver's seat (20), and the operator mowing between the steering column (71) and the side column (72). A sufficient space for placing and placing one foot on the part (8) side is secured, the front-rear length of the driving operation part (18) is reduced, and the overall length of the aircraft is reduced, thereby making the aircraft more compact. In addition, the front part of the step plate (134) raised up in an inclined manner makes it easy to place both feet of the operator and stabilizes the working posture.
[0068]
Further, the steering column (71) is erected in front of the driver seat (20) of the driving operation unit (18), and a side column (72) is provided on the side of the cutting unit (8) side of the driving operation unit (18). The steering column (71) lower than the step plate (134), the steering operation output unit (126) to the turning HST (28), the main transmission operation input unit (99) from the side column (72), and the straight traveling A main shift operation output section (125) to the HST (25) is provided, and a mission (22) for mounting a turning HST (28) and a straight traveling HST (25) is disposed below the side column (72). A steering operation transmission path and a main transmission operation transmission path are formed on the lower surface side of the step plate (134), and a step plate (134c) on the upper surface side of the steering operation transmission path and the main transmission operation transmission path is detachably provided. In Therefore, the main transmission operation system and the steering operation system are properly formed, and maintenance can be easily performed. These are always kept in an appropriate state, and the transmission accuracy of the main transmission operation and the steering operation is increased, that is, the main transmission operation. And improve steering operation accuracy.
[0069]
Further, by forming the side column (72) on the side of the driver's seat (20) so that it can be freely opened and closed, the steering operation input sections of the turning HST (28) and the straight traveling HST (25) on the upper side of the mission (22) ( 140), the main transmission operation input unit (135), the main transmission operation unit, and other internal mechanisms of the side column can be easily maintained from the driver seat (20) side, and these are always kept in an appropriate state to maintain the main transmission operation and operation. The transmission accuracy of the direction operation is increased, that is, the main shift operation and the steering operation accuracy are increased. Further, the length adjustment of the steering operation transmission member (143) and the main transmission operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed. 28) and the steering operation input unit (140) and the main transmission operation input unit (135) of the straight traveling HST (25) can be properly performed while visually confirming the state, and the main transmission operation system and the steering operation system are properly controlled. It is formed and can be easily maintained, and these are always kept in an appropriate state to increase the transmission accuracy of the main shift operation and the steering operation, that is, the main shift operation and the steering operation accuracy.
[0070]
Further, a main transmission operation input section (99) is formed in the space on the lower side of the front section of the step plate (134) on the side of the steering column (71) on the side column (72) side formed by raising the front section of the step plate (134). ), The main transmission operation input unit (99) is provided by effectively using the surplus space, contributing to the compactness of the aircraft.
[0071]
【The invention's effect】
As can be seen from the above embodiments, the present invention is applied to the round handle type steering column (71) in front of the driver seat (20).,A steering operation output unit (126) to the turning HST (28) and a main transmission operation input unit (99) from the side column (72) on the side of the driver's seat (20) and a main to the straight traveling HST (25) A shift operation output unit (125) is provided.,Equipped with each HST (28) (25)didA mission (22) is arranged below the side column (72),The mission ( 22) HST for turning ( 28) and steering column ( 71) Steering operation output section ( 126) and a steering operation transmission member that is adjustable in length and forms a steering operation transmission path between ( 143) and the same mission ( 22) Straight HST ( 25) and steering column ( 71) main shift operation output section ( 125) and a main speed change transmission member that can adjust the length of the main speed change transmission path. ( 138) and the main shift operation input unit ( 99) main transmission operation lateral transmission member linked to ( 100) and length-adjustable main transmission operation longitudinal transmission member ( 104), each HST ( 28) ( 25) Mission ( 22) HST mounting seat ( 204) side column ( 72) Support frame ( 201) and the main transmission operation lateral transmission member ( 100) input side end of the HST mounting seat ( 204), and the transmission member ( 100) the output side end of the chassis frame ( 3a) is supported by a main transmission operation lateral transmission member ( 100) and the main transmission operation longitudinal transmission member ( 104) is the side column ( 72) Driver's seat (20 ) Main shift operation on the outside of the steering column ( 71) Main transmission operation input section ( 135) and the main transmission operation lateral transmission member. ( 100) and the main transmission operation longitudinal transmission member ( 104) and the steering operation transmission member ( 143) and the main transmission operation transmission member ( 138) all the side columns ( 72) on the side of the driver's seat ( 20) A step plate stretched to the front lower side ( 134) and each transmission member ( 104) ( 143) ( 138) Length adjusting part ( 103) ( 142) ( 137) on the step plate ( 134) and arranged on the lower surface side of the step plate ( 134) and side column ( 72) Driver's seat ( 20) Side wall ( 202) are formed to be openable and closable.As a result, the three of the steering column (71), the side column (72), the turning HST (28) and the transmission (22) equipped with the straight traveling HST (25) are arranged closer to each other than before, and the main shift operation and The transmission distance of the steering operation is shortened, and the transmission accuracy of these operations is increased, that is, the main shift operation and the steering operation accuracy are increased. In addition, the transmission (22) and the dust cover of the transmission section prevent mud and dust from adhering to the main transmission operation and steering operation transmission members and other side column internal mechanisms, thereby improving the transmission accuracy of the main transmission operation and steering operation. Reduce factors to lower. Further, the main transmission operation is transmitted from the side column (72) to the steering column (71) in the same direction as the operation direction, thereby increasing the transmission accuracy of the main transmission operation, that is, increasing the main transmission operation accuracy.
In addition, maintenance of the main transmission operation transmission system from the side column (72) to the steering column (71) can be easily performed from the driver seat (20) side, and this is always maintained in an appropriate state to improve transmission accuracy of the main transmission operation. That is, the main shift operation accuracy is increased.
[0072]
Further, the support frame (201) of the side column (72) is connected to the HST mounting seat (204) to the mission (22), and the input side end of the main transmission operation lateral transmission member (100) is connected to the HST mounting seat. (204), and the output side end of the main transmission operation lateral transmission member (100) is supported by the chassis frame (3a), thereby integrating the main transmission operation section (73) and the operated section (135). The main transmission operation lateral transmission member (100) which is supported by the structure of FIG. 5 and serves as a fulcrum part of the main transmission operation system from the side column (72) to the steering column (71) is also connected to the main transmission operation unit (73). It is supported by an integral structure that supports the operation portion (135), and the support rigidity of the main transmission operation system is increased, and the transmission accuracy of the main transmission operation is increased, that is, the main transmission operation accuracy is increased. The side column (72) is also connected to the chassis frame (3a) supporting the steering column (71), so that the steering column (71), the side column (72), the turning HST (28), and the straight traveling Three of the missions (22) equipped with the HST (25) are integrally supported to increase the support rigidity of both the main transmission operation system and the steering operation system, and increase the transmission accuracy of the main transmission operation and the steering operation. That is, the accuracy of the main speed change operation and the steering operation is increased.
[0073]
Further, the steering operation transmission member (143) having an adjustable length and forming the steering operation transmission path between the steering operation output section (126) of the steering column (71) and the turning HST (28) and the steering. An adjustable main transmission operation transmission member (138) that forms a main transmission operation transmission path between the main transmission operation output section (125) of the column (71) and the straight traveling HST (25) is provided for driving. The main transmission operation longitudinal transmission member (104), the steering operation transmission member (143), and the main transmission operation transmission member (138) are provided on the lower surface side of the detachable step plate (134c) that is stretched forward and under the seat (20). The side column (72) is provided by arranging the length adjusting portions (103) (142) (137) of the transmission members (104) (143) (138) on the lower surface side of the step plate (134c). From Steering operation transmission member (43) and main transmission operation transmission from main steering operation transmission member (104) to steering column (71) and steering column (71) to turning HST (28) and straight traveling HST (25) The length of the member (138) can be easily adjusted, the main transmission operation system and the steering operation system can be properly formed, and maintenance can be easily performed. Transmission accuracy, that is, main shift operation and steering operation accuracy.
[0074]
Further, by forming the side wall (202) on the driver seat (20) side of the side column (72) so that it can be opened and closed, the steering operation of the turning HST (28) and the straight traveling HST (25) on the upper side of the mission (22). Maintenance of the input unit (140), the main transmission operation input unit (135), the main transmission operation unit, and other side column internal mechanisms can be easily performed from the driver seat (20) side, and these are always kept in an appropriate state to maintain the main transmission. The transmission accuracy of the operation and the steering operation is increased, that is, the main shift operation and the steering operation accuracy are increased. Further, the length adjustment of the steering operation transmission member (143) and the main transmission operation transmission member (138) from the steering column (71) to the turning HST (28) and the straight traveling HST (25) is performed. ) And the steering operation input unit (140) and the main transmission operation input unit (135) of the straight traveling HST (25) can be appropriately performed while visually confirming, and the main transmission operation system and the steering operation system are appropriately formed. In addition, the maintenance can be easily performed, and these are always kept in an appropriate state to increase the transmission accuracy of the main shift operation and the steering operation, that is, the main shift operation and the steering operation accuracy.
[Brief description of the drawings]
FIG. 1 is an overall side view of a combine.
FIG. 2 is an overall plan view of the combine.
FIG. 3 is an explanatory diagram of a mission drive system
FIG. 4 is an explanatory perspective view of a travel shift and steering operation unit.
FIG. 5 is an operation explanatory diagram of the same part.
FIG. 6 is a side view of a steering column.
FIG. 7 is an enlarged side view of the upper part.
FIG. 8 is an enlarged side view of the lower part.
FIG. 9 is a front view of a steering column.
FIG. 10 is an enlarged front view of the upper part.
FIG. 11 is an enlarged front view of the lower part.
12 is an explanatory plan view of FIG. 4;
FIG. 13 is an enlarged view of the same.
FIG. 14 is a cross-sectional view of a steering column
15 is an exploded explanatory view of FIG. 14;
FIG. 16 is a partial plan view of the upper part of the steering column.
FIG. 17 is a partial view thereof.
18 is an operation explanatory diagram of FIG.
FIG. 19 is a diagram showing main shift and steering handle operation.
FIG. 20 is a diagram showing sub-shifting and steering handle operation.
FIG. 21 is a right side view of the driving operation unit.
FIG. 22 is a left side view of the driving operation unit.
FIG. 23 is an enlarged side view of the upper part.
FIG. 24 is an enlarged side view of the lower part.
FIG. 25 is a side view of a side column.
FIG. 26 is a plan view thereof.
FIG. 27 is a front view of the same.
FIG. 28 is a side view of the main transmission operation system input unit.
FIG. 29 is a plan view thereof.
FIG. 30 is a front view of the same.
FIG. 31 is a plan view of a middle shaft.
FIG. 32 is a side view of the output section of the main speed change operation and steering operation system.
FIG. 33 is a plan view thereof.
FIG. 34 Front view
FIG. 35 is a side view of the auxiliary transmission operation system.
FIG. 36 is a front view of the same.
FIG. 37: Side view of parking brake operation system
FIG. 38 is a plan view thereof.
FIG. 39 same front view
FIG. 40 is an enlarged side view of the check mechanism.
41 is an enlarged side view of the top of the mission
[Explanation of symbols]
(2) Traveling crawler
(3) (3a) Chassis frame
(8) Mowing section
(18) Driving control section
(19) Steering handle
(20) Driver's seat
(21) Engine
(22) Mission
(23) First hydraulic pump
(24) First hydraulic motor
(25) Straight HST
(26) Second hydraulic pump
(27) Second hydraulic motor
(28) HST for turning
(47) Sub-transmission shaft
(49) Parking brake shaft
(57) Parking brake
(71) Steering column
(72) Side column
(73) Main transmission lever
(74) Sub-shift lever
(99) Main transmission shaft (Main transmission operation input section)
(100) Intermediate shaft (main transmission operation lateral transmission member)
(103) Turnback
(104) Rod (main transmission operation longitudinal transmission member)
(125) Speed change operation shaft (main speed change operation output unit)
(126) Steering operation axis (steering operation output unit)
(134) Step board
(135) First trunnion (main transmission operation input unit)
(137) Turnback
(138) Rod (main transmission operation transmission member)
(140) Second trunnion
(142) Turnback
(143) Rod (steering operation transmission member)
(202) Side column side wall
(233) Checking mechanism
(225) Output arm (parking brake operation output part)
(232) Parking brake shifter (parking brake operation input part)
(217) Parking brake pedal
(218) Parking brake lever
(204) HST mounting seat
(201) Support frame structure
(207) Sub shift shifter shaft (sub shift operation input section)
(233) Parking brake operation wire
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29618098A JP4183809B2 (en) | 1998-10-02 | 1998-10-02 | Mobile farm machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29618098A JP4183809B2 (en) | 1998-10-02 | 1998-10-02 | Mobile farm machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000110933A JP2000110933A (en) | 2000-04-18 |
JP4183809B2 true JP4183809B2 (en) | 2008-11-19 |
Family
ID=17830209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP29618098A Expired - Fee Related JP4183809B2 (en) | 1998-10-02 | 1998-10-02 | Mobile farm machine |
Country Status (1)
Country | Link |
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JP (1) | JP4183809B2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008196649A (en) * | 2007-02-15 | 2008-08-28 | Mitsubishi Agricult Mach Co Ltd | Work vehicle |
JP2017079605A (en) * | 2015-10-23 | 2017-05-18 | ヤンマー株式会社 | combine |
JP2017046621A (en) * | 2015-09-01 | 2017-03-09 | ヤンマー株式会社 | Combine-harvester |
WO2017038639A1 (en) * | 2015-09-01 | 2017-03-09 | ヤンマー株式会社 | Combine harvester |
-
1998
- 1998-10-02 JP JP29618098A patent/JP4183809B2/en not_active Expired - Fee Related
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JP2000110933A (en) | 2000-04-18 |
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