JP3896726B2

JP3896726B2 - Mobile farm machine

Info

Publication number: JP3896726B2
Application number: JP12732199A
Authority: JP
Inventors: 正文佐伯; 建之大内; 信山口; 和弘竹川; 善宏福村
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 1999-05-07
Filing date: 1999-05-07
Publication date: 2007-03-22
Anticipated expiration: 2019-05-07
Also published as: JP2000316329A

Description

【０００１】
【発明の属する技術分野】
この発明は、移動農機の走行装置の改良に関するものである。
【０００２】
【従来技術】
従来の移動農機には、エンジンの回転動力を走行車輪に伝達するために、走行ミッション装置が設けられていて、走行ミッション装置の主変速装置により高低に走行速度を変速すると共に、副変速装置を高低に変速して、道路での移動速度，圃場での作業速度，旋回速度を適正化していた。
【０００３】
【発明が解決しようとする問題点】
しかし、従来装置にあっては、移動農機を畦越えして隣の圃場に移動させる場合には、安全な低速走行ができず、また、畦越え時の操作も煩わしいという問題点があった。そこで、この発明はこのような問題点を解決しようとするものである。
【０００４】
【問題を解決するための手段】
このような技術的課題を解決するための請求項１の発明は、エンジン（３）からの動力を副変速装置（１３）、ミッションケース（１８）を介して左右の前輪（６）及び後輪（７）からなる走行車輪へ伝動する構成とし、後部に田植機（８）を昇降自在に連結した移動農機であって、ミッションケース（１８）内には、入力軸（１９）及び植付駆動軸（３２）を並列配置して軸架すると共に、前記入力軸（１９）の横側方には該入力軸（１９）の端部に設けたニードルベアリングを介して軸受され該入力軸（１９）と軸心一致状態となる変速軸（２０）を架設し、入力軸（１９）に入力ギヤ（２６）を設け、植付駆動軸（３２）に減速第一ギヤ（２７）及び減速第二ギヤ（２８）を遊転自在に設けると共に株間変速第二大・小ギヤ（３６ａ，３６ｂ）を摺動自在に設け、変速軸（２０）に小径ギヤ（２９）及び大径ギヤ（３０）と低速主変速ギヤ（３５）及び高速主変速ギヤ（３４）とを各々該軸方向に摺動自在に設けると共に株間変速第一大・小ギヤ（３３ａ，３３ｂ）を設け、入力軸（１９）から入力ギヤ（２６）を介して減速第一ギヤ（２７）へ伝動する構成とし、小径ギヤ（２９）及び大径ギヤ（３０）を摺動させることにより、小径ギヤ（２９）が減速第一ギヤ（２７）に噛み合って該小径ギヤ（２９）を介して変速軸（２０）へ伝動する状態から、大径ギヤ（３０）が減速第一ギヤ（２７）と一体の減速第二ギヤ（２８）に噛み合って該大径ギヤ（３０）を介して変速軸（２０）へ伝動する状態に減速伝動可能な減速装置（Ａ）を構成し、株間変速第二大・小ギヤ（３６ａ，３６ｂ）を摺動させることにより、株間変速第二小ギヤ（３６ｂ）が株間変速第一大ギヤ（３３ａ）に噛み合って変速軸（２０）から該株間変速第二小ギヤ（３６ｂ）を介して植付駆動軸（３２）へ伝動する状態と、株間変速第二大ギヤ（３６ａ）が株間変速第一小ギヤ（３３ｂ）に噛み合って変速軸（２０）から該株間変速第二大ギヤ（３６ａ）を介して植付駆動軸（３２）へ伝動する状態とに切り替えて植付株間を変更する構成とし、大ギヤ（４０）と小ギヤ（４１）とを有するセンターギヤ（４２）を設け、低速主変速ギヤ（３５）及び高速主変速ギヤ（３４）を摺動させることにより、低速主変速ギヤ（３５）が大ギヤ（４０）に噛み合って変速軸（２０）から走行車輪へ伝動する状態と、高速主変速ギヤ（３４）が小ギヤ（４１）に噛み合って変速軸（２０）から走行車輪へ伝動する状態とに切り替えできる主変速装置（Ｂ）を構成し、センターギヤ（４２）からの動力が入力される前輪差動装置（２３）から左右の横伝動軸（４８）及びミッションケース（１８）下端側に支持した左右の前輪伝動装置（５０）を介して左右各々の前輪（６）へ伝動される構成とし、減速装置（Ａ）をミッションケース（１８）における左右いずれかの側部に偏位して配置し、株間変速第二大・小ギヤ（３６ａ，３６ｂ）及び株間変速第一大・小ギヤ（３３ａ，３３ｂ）を主変速装置（Ｂ）に対して減速装置（Ａ）側に配置し、減速装置（Ａ）の切り替え操作をする超減速レバー（６２）と副変速装置（１３）の変速ベルト（１３ａ，１３ｂ）を緊張・弛緩する副変速クラッチ（１３ｃ，１３ｄ）を操作して走行伝動を入切操作するクラッチレバー（６４）とを、減速装置（Ａ）を偏位して配置した側に配置した移動農機とした。
【０００５】
【発明の作用及び効果】
請求項１の発明は、前記のように、田植機用の移動農機にあっては是非とも必要とする入力軸１９及び植付駆動軸３２を有効に活用して、入力軸１９の回転動力を変速して変速軸２０に減速伝動可能な減速装置Ａを構成し、前記入力軸１９の横側方には該入力軸１９の端部に設けたニードルベアリングを介して軸受され該入力軸１９と軸心一致状態となる変速軸２０を架設して、変速軸２０に変速を司る低速主変速ギヤ３５及び高速主変速ギヤ３４を設ける構成としたので、減速装置Ａ及び主変速装置Ｂを左右に並列配置することができて、ミッションケース１８を前後長を短くして簡潔な構成とし、軽量でコスト安の超減速伝動を実現することができた。
【０００６】
また、前記のように、ミッションケース１８の左右いずれかに偏位した側に、減速装置Ａ、超減速レバー６２、及び走行伝動を入切操作するクラッチレバー６４をまとめて配置し、株間変速第二大・小ギヤ３６ａ，３６ｂ及び株間変速第一大・小ギヤ３３ａ，３３ｂを主変速装置Ｂに対して減速装置Ａ側に配置したので、オペレ−タが機体から降りた状態での超減速走行時の畦越え操作が機体の左右一方側からこれらの操作を行なうことができて、畦越えのための操作が簡単化し、該操作を安全に且つ楽に行なうことができるものである。
【０００７】
【発明の実施の形態】
以下、移動農機の実施の形態について説明する。
移動農機１は、図１乃至図３に示すように、車体フレーム２の中央にエンジン３を搭載し、エンジン３の上側に操縦座席４を設け、車体フレーム２の前側部に操舵用のハンドル５を配置し、前部左右両側には左・右前輪６，６を配置し、後部左右両側には左・右後輪７，７を配置し、後部には田植機８を昇降自在に連結している。
【０００８】
走行ミッション装置９は、図２及び図３に示すように、前記エンジン３から入力された回転動力を左・右前輪６，６及び左・右後輪７，７に伝動するように、車体フレーム２の前側部に配置している。
主クラッチ装置１１は、図１，図２に示すように、前記エンジン３と走行ミッション装置９の中間入力軸１２との間に設けた伝動ベルト１１ａ，該伝動ベルト１１ａを緊張・弛緩するベルトテンション式のクラッチ１１ｂ，該クラッチ１１ｂを断続操作する主クラッチレバー（図示省略）により構成している。
【０００９】
副変速装置１３は、中間入力軸１２とミッションケース１８の入力軸１９との間に設けた高・低副変速ベルト１３ａ，１３ｂ、該高・低副変速ベルト１３ａ，１３ｂを択一的に緊張・弛緩するベルトテンション式の副変速クラッチ１３ｃ，１３ｄ、該副変速クラッチ１３ｃ，１３ｄを断続操作する副変速レバー６０により構成し、入力軸１９を高速伝動あるいは低速伝動する構成である。
【００１０】
そして、主クラッチレバー（図示省略）及び副変速レバー６０は、入り側にテンションスプリング（図示省略）によって押圧し、切り側には手動により操作する通常のテンションクラッチ操作レバーである。そして、主クラッチレバー（図示省略）及び副変速レバー６０は、クラッチを切り位置に移動した状態でロック装置（図示省略）によりロックできる構成である。なお、主クラッチレバー（図示省略）及び副変速レバー６０を足踏み式のぺダルに構成してもよい。
【００１１】
走行ミッション装置９は図３に示すように構成している。ミッションケース１８において、伝動上手側から、入力軸１９、植付杆駆動軸３２、入力軸１９の右側方に軸心一致状態に軸架している主変速軸２０（主変速軸２０の左側端部は、入力軸１９の右側端部のニードルベアリングを介して軸受されている。）、クラッチ軸２１、前輪ブレーキ軸２２、前輪差動装置２３、左・右ホイール伝動軸２４の順に軸架している。
【００１２】
そして、入力軸１９の外側には、高・低入力プーリ２５ａ，２５ｂを軸着して回転動力を入力する構成とし、入力軸１９のミッションケース１８内部には、入力ギヤ２６を設けている。前記植付杆駆動軸３２の左側部には、一体的に構成されている大径の減速第１ギヤ２７及び小径の減速第２ギヤ２８をベアリングを介して遊転自在に設けている。
【００１３】
主変速軸２０の左側端部には、一体的に構成している小径ギヤ２９と大径ギヤ３０とを軸方向に摺動自在に軸着し、超減速シフタ装置３１により摺動させるように構成としている。しかして、左側に摺動すると、小径ギヤ２９が前記減速第１ギヤ２７に噛み合って、入力軸１９の等速回転動力が主変速軸２０に伝動され、また、右側に摺動すると、大径ギヤ３０が前記減速第２ギヤ２８に噛み合って、主変速軸２０に減速された回転動力が伝動されるように、減速装置Ａを構成している。
【００１４】
また、主変速軸２０の小径ギヤ２９及び大径ギヤ３０の右側部には、少し径の異なる株間変速第１大・小ギヤ３３ａ，３３ｂを軸着し、その右側部には一体的な小径の低速主変速ギヤ３５及び大径の高速主変速ギヤ３４を摺動自在に軸着している。
植付駆動軸３２の前記減速第２ギヤ２８，減速第１ギヤ２７の右側部には、少し径の異なる一体的な株間変速第２大・小ギヤ３６ａ，３６ｂを摺動自在に取り付け、該株間変速第２大・小ギヤ３６ａ，３６ｂを左側に移動すると、株間変速第１大ギヤ３３ａと株間変速第２小ギヤ３６ｂとが噛み合い、また、株間変速第２大・小ギヤ３６ａ，３６ｂを右側に移動すると、株間変速第１小ギヤ３３ｂと株間変速第２大ギヤ３６ａとが噛み合い、主変速軸２０の回転動力が少し変速されて植付駆動軸３２に伝達され、田植機８の植付株間が変更される構成である。
【００１５】
また、植付駆動軸３２と主変速軸２０の右側端部には、株間変速第２装置３７が設けられていて、更に株間変速がされて、ギヤ３８を介して植付伝動軸３９に動力が伝達される構成である。
クラッチ軸２１の中央部には、図３に示すように、大ギヤ４０と小ギヤ４１とを有するセンターギヤ４２を軸着し、センターギヤ４２の小ギヤ４１は前記高速主変速ギヤ３４に噛み合ったり、また、センターギヤ４２の大ギヤ４０は前記低速主変速ギヤ３５に択一的に噛み合う構成である。
【００１６】
前記センターギヤ４２の両側には、軸方向に摺動自在の左・右サイドクラッチギヤを係合離脱自在に設けた左・右サイドクラッチ装置４３，４３を設けている。そして、左・右サイドクラッチ装置４３，４３の外側には、コーン式あるいはディスク式に構成した左・右サイドブレーキ装置４４，４４を夫れ夫れ設け、左・右サイドクラッチを切った後に、更に外側への移動を継続すればブレーキが作動し、左・右サイドクラッチギヤに制動力を与える構成としている。
【００１７】
前輪ブレーキ軸２２は、図３に示すように、前記小ギヤ４１に噛み合いする伝動大ギヤ４６、及び、前記大ギヤ４０に噛み合い、且つ、伝動下手側にある前輪差動装置２３の伝動差動ギヤ２３ａに噛み合いする伝動小ギヤ４５を軸着し、前輪ブレーキ軸２２の一側部に外部から操作可能にブレーキ装置４７を構成している。
【００１８】
そして、左・右前輪６，６には、前記前輪差動装置２３から左・右横伝動軸４８，４８、左・右縦伝動軸４９，４９、左・右縦伝動軸４９，４９のケース下端側に操舵・旋回可能に嵌合支持した左・右前輪伝動装置５０，５０を介して、回転動力と前輪ブレーキ軸２２からの制動力が伝達できる構成としている。
なお、前輪差動装置２３は、差動ロック爪（図示省略）を備えており、差動ロック爪（図示省略）により、左・右前輪６，６が差動しないようにすることができる。この差動ロック爪（図示省略）は、機体の走行が超低速になるように超減速シフタ装置３１を操作すると、関連的に作動できるように構成されている。これにより、畦越え時等に左・右前輪６，６が差動することによる走行駆動力の低下や機体前進方向の急激な変化あるいは転倒等の危険を防止している。
【００１９】
左・右後輪７，７には、左・右サイドクラッチ装置４３，４３から左・右ホイールギヤ５３，５３を介しで伝達された回転動力が、左・右ホイール伝動軸２４，２４に伝達され、更に、左・右後輪伝動軸５２，５２を介して伝動する構成としている。しかして、左・右後輪７，７は、左・右サイドクラッチ装置４３，４３による動力の断続と、左・右サイドブレーキ装置４４，４４に基づく制動力が伝達される。
【００２０】
左・右クラッチぺダル５５，５５は、周知の構成と同様であり、操縦座席４の前側における右側に偏位した位置に配置し、前記左・右サイドクラッチ装置４３，４３及び左・右サイドブレーキ装置４４，４４に操作可能に連結している。そして、左・右クラッチぺダル５５，５５は、図５に示すように、左・右クラッチぺダル５５，５５は係合離脱自在の連杆５６によって連結できる構成としている。
【００２１】
次ぎに、前記構成の伝動状態について説明する。
まず、主クラッチレバー（図示省略）を入り位置に操作すると、エンジン３の回転動力は、主クラッチ装置１１，副変速装置１３を経て高・低入力プーリ２５ａ，２５ｂに伝動され、走行ミッション装置９の入力軸１９に伝達される。
次いで、回転動力は、入力軸１９の入力ギヤ２６から減速第１ギヤ２７、小径ギヤ２９、高速主変速ギヤ３４（あるいは低速主変速ギヤ３５）、センターギヤ４２の小ギヤ４１（あるいはセンターギヤ４２の大ギヤ４０）を経由した、通常回転動力が伝達されて、移動速度や作業速度の通常走行がなされる。
【００２２】
次ぎに、一方の左・右後輪７，７への伝動経路を説明すると、回転動力は、センターギヤ４２の両側に係合している左・右サイドクラッチ装置４３，４３によって、下手側の左・右ホイール伝動軸２４，２４の左・右ホイールギヤ５３，５３に伝達され、次いで、回転動力は更に後方に延長した左・右後輪伝動軸５２，５２を経て左・右後輪７，７に伝動される。
【００２３】
他方の左・右前輪６，６への回転動力は、センターギヤ４２の小ギヤ４１から伝動大ギヤ４６（あるいは、大ギヤ４０から伝動小ギヤ４５）、前輪ブレーキ軸２２、伝動小ギヤ４５、伝動作動ギヤ２３ａ、前輪差動装置２３、左・右横伝動軸４８，４８、左・右縦伝動軸４９，４９、左・右前輪伝動装置５０の順に伝動されて、左・右前輪６，６に伝達される。
【００２４】
次ぎに、大径の減速第１ギヤ２７，小径の減速第２ギヤ２８、及び、小径ギヤ２９，大径ギヤ３０から構成されている減速装置Ａを減速変速した伝動状態について説明する。
超減速シフタ装置３１により小径ギヤ２９，大径ギヤ３０を右側に摺動し、大径ギヤ３０を前記減速第２ギヤ２８に噛み合わせる。すると、小径の減速第２ギヤ２７から大径ギヤ３０に減速回転が伝達されて、主変速軸２０は減速回転し、更に、低速主変速ギヤ３５、大ギヤ４０を経てセンターギヤ４２が減速回転する。しかして、以下の伝動経路は前記と同様にして、左・右後輪７，７、左・右前輪６，６に伝達され、超低速で走行する。なお、この時には前輪差動装置２３の差動ロック爪（図示省略）が関連的に操作されて、左・右前輪６，６を差動しないようにロック状態となる。
【００２５】
前記のように、入力軸１９及び植付杆駆動軸３２を有効に利用して減速装置Ａを設け、入力軸１９の側方に軸心一致状態で配置した主変速軸２０には高・低主変速ギヤ３５，３４からなる主変速装置Ｂを設けたので、簡潔な構成で、軽量でコスト安の超減速伝動を実現することができた。
次ぎに、操作レバー類の構成について説明する。
【００２６】
主変速装置Ｂを構成する高・低速主変速ギヤ３４，３５を操作する主変速レバー５８は、図６に示すように、ハンドルポスト５９におけるハンドル５の左側部に設けられていて、移動速度位置、作業速度位置、中立位置、後進位置に夫れ夫れ操作できる。また、副変速装置１３を操作する副変速レバー６０も同様にハンドル５の左側部に設けられていて、高速位置、低速位置に操作できる構成である。また、株間変速レバー６１もハンドル５の左側部に設けられている。
【００２７】
機体の左側部には、前記減速装置Ａを操作する減速レバー６２を設け、左・右クラッチぺダル５５，５５を同様に機体の左側部に設けている。左・右クラッチぺダル５５，５５の側方にクラッチレバー６４を設けて、このクラッチレバー６４を副変速クラッチ１３ｃ，１３ｄに連係し、クラッチレバー６４の操作により副変速クラッチ１３ｃ，１３ｄを共に非作用状態にして走行伝動を断つことができる構成である。尚、クラッチレバ−６４は、操縦座席４の前側における左側に偏位した位置に設けたクラッチペダル７０に連係され、オペレ−タが操縦座席４に座っての通常作業時は該クラッチペダル７０の踏み込みにより操作できる。尚、クラッチレバ−６４に備える解除レバ−６５により、クラッチレバ−６４を下降させた位置すなわち伝動切りの位置に係止することができる構成としている。また、機体の前部には、Ｌ字形の畦越えアーム６３を設けている。この畦越えアーム６３は、実線で示す収納位置と、仮想線で示す前方に突出させた使用位置とに変更できる構成である。
【００２８】
しかして、移動農機１を減速伝動して畦越えさせる場合には、副変速レバー６０を低速位置に操作して低速伝動に切り替え、主変速レバー５８を作業速度位置に操作して主変速装置Ｂを低速に切り替える。次いで、オペレータは移動農機１から降りて、機体の前部・左横側部に位置して、減速レバー６２を減速位置に操作して、Ａを減速側に切り替え、次いで、クラッチレバー６４を伝動切り位置から伝動入り位置に操作する。しかして、移動農機１を超低速で前進させ、オペレータは畦越えアーム６３により機体前部の浮き上がりを防止しつつ畦越えをさせる。
【００２９】
よって、オペレータは移動農機１から降りた状態で、機体の前部・左横側部から減速レバー６２及びクラッチレバー６４を操作できるので、これらの双方の操作を行うとき、オペレ−タが機体を迂回するように機体の周囲を移動して機体の左右に移動したり一度機体に搭乗したりする必要がなく、減速レバー６２及びクラッチレバー６４を操作することができる。
【００３０】
なお、クラッチレバー６４と前記前輪ブレーキ軸２２のブレーキ装置４７とは、連動部材６６を介し接続されているので、畦越え中にクラッチレバー６４を伝動切り位置に操作すると、左・右前輪６，６、に関連的にブレーキが作動し、畦越え中の移動農機１をその位置に停止させて、傾斜下位側への移動を阻止できて、安全を確保できる。
【図面の簡単な説明】
【図１】移動農機の全体側面図である。
【図２】移動農機の一部省略した全体平面図である。
【図３】走行ミッション装置の展開した切断面図である。
【図４】移動農機の全体平面図である。
【図５】要部の平面図である。
【図６】要部の平面図である。
【図７】要部の一部切断した平面図である。
【図８】要部の側面図である。
【図９】図３の要部の拡大図である。
【符号の説明】
１…移動農機、２…車体フレーム、３…エンジン、４…操縦座席、５…ハンドル、６…左・右前輪、７…左・右後輪、８…田植機、９…走行ミッション装置、１１…主クラッチ装置、１１ａ…伝動ベルト、１１ｂ…クラッチ、１２…中間入力軸、１３…副変速装置、１５…エンジン出力ベルト、１８…ミッションケース、１９…入力軸、２０…主変速軸、２１…クラッチ軸、２２…前輪ブレーキ軸、２３…前輪差動装置、２３ａ…伝動差動ギヤ、２４…左・右ホイール伝動軸、２５…入力プーリ、２６…入力ギヤ、２７…減速第１ギヤ、２８…減速第２ギヤ、２９…小径ギヤ、３０…大径ギヤ、３１…超減速シフタ、３２…植付杆駆動軸、３３ａ…株間変速第１大ギヤ、３３ｂ…株間変速第１小ギヤ、３４…高速主変速ギヤ、３５…低速主変速ギヤ、３６ａ…株間変速第２大ギヤ、３６ｂ…株間変速第２小ギヤ、３７…株間変速第２装置、３８…ギヤ、３９…植付伝動軸、４０…大ギヤ、４１…小ギヤ、４２…センターギヤ、４３…左・右サイドクラッチ装置、４４…左・右サイドブレーキ装置、４５…伝動小ギヤ、４６…伝動大ギヤ、４７…ブレーキ装置、４８…左・右横伝動軸、４９…左・右縦伝動軸、５０…左・右前輪伝動装置、５２…左・右後輪伝動装置、５３…左・右ホイールギヤ、５５…左・右クラッチぺダル、５６…連杆、５７…操作杆、５８…主変速レバー５９…ハンドルポスト、６０…副変速レバー、６１…株間変速レバー、６２…減速レバー、６３…畦越えアーム、６４…クラッチレバー、６５…解除レバー、６６…連動部材、Ａ…減速装置、Ｂ…主変速装置。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a traveling device for a mobile agricultural machine.
[0002]
[Prior art]
A conventional mobile agricultural machine is provided with a traveling mission device to transmit the rotational power of the engine to the traveling wheels, and the traveling speed of the main transmission device of the traveling mission device is changed to high and low, and the auxiliary transmission device is installed. Shifting to high and low, the speed on the road, work speed on the field, and turning speed were optimized.
[0003]
[Problems to be solved by the invention]
However, the conventional apparatus has a problem that when traveling over a mobile farm machine and moving to an adjacent farm field, safe low-speed traveling cannot be performed, and an operation at the time of crossing the fence is troublesome. Therefore, the present invention is intended to solve such problems.
[0004]
[Means for solving problems]
In order to solve such a technical problem, the invention according to claim 1 is characterized in that the power from the engine (3 ) is transmitted to the left and right front wheels (6) and the rear wheels via the auxiliary transmission (13) and the transmission case (18). (7) It is the structure which transmits to the driving | running | working wheel which consists of (7), It is a mobile farm machine which connected the rice transplanter (8) to the rear part so that raising / lowering was possible, Comprising: In a mission case (18) , an input shaft (19) and planting drive together with the shaft (32) axially rack arranged in parallel, said input shaft (19) lateral side the input shaft to the (19) via a needle bearing provided on the end portion is bearing the input shaft of the (19 ) and bridged transmission shaft as a shaft center coincides state (20), the input shaft (19) to provided an input gear (26), reduction first gear to planting drive shaft (32) (27) and the deceleration second A gear (28) is provided so as to be freely rotatable, and a stock shift second large / small gear (36a, 6b) is slidably provided, and a small-diameter gear (29) and a large-diameter gear (30), a low-speed main transmission gear (35), and a high-speed main transmission gear (34) are respectively provided in the axial direction on the transmission shaft (20). It is provided slidably and is provided with a first inter-stock shift first large / small gear (33a, 33b) to transmit from the input shaft (19) to the reduction first gear (27) via the input gear (26). By sliding the gear (29) and the large-diameter gear (30), the small-diameter gear (29) meshes with the first reduction gear (27) and is transmitted to the transmission shaft (20) via the small-diameter gear (29). The large diameter gear (30) meshes with the reduction second gear (28) integral with the reduction first gear (27) and is transmitted to the transmission shaft (20) via the large diameter gear (30). The speed reducer (A) that can be decelerated and transmitted to the stock, the stock shift second large / small gear (3 a, 36b) is slid, the inter-stock shift second small gear (36b) meshes with the inter-stock shift first large gear (33a), and the inter-stock shift second small gear (36b) is moved from the speed change shaft (20). Through the planting drive shaft (32), and the inter-stock transmission second large gear (36a) meshes with the inter-organization transmission first small gear (33b) so that the inter-stock transmission second large gear is transmitted from the transmission shaft (20). The center gear (42) having a large gear (40) and a small gear (41) is configured to change between the planting stocks by switching to a state of transmission to the planting drive shaft (32) via (36a). The low-speed main transmission gear (35) and the high-speed main transmission gear (34) are slid and provided so that the low-speed main transmission gear (35) meshes with the large gear (40) and is transmitted from the transmission shaft (20) to the traveling wheel. And the high-speed main transmission gear (34) is a small gear (4 1) A main transmission (B) that engages with the transmission shaft (20) and can be switched to a state in which it is transmitted from the transmission shaft (20) to the traveling wheel is configured, and a front wheel differential (23) to which power from the center gear (42) is input To the left and right front wheels (6) through the left and right lateral transmission shafts (48) and the left and right front wheel transmission devices (50) supported on the lower end side of the transmission case (18). Is shifted to either the left or right side of the transmission case (18), and the stock shift second large / small gear (36a, 36b) and the stock shift first large / small gear (33a, 33b) are mainly used. A super deceleration lever (62) for switching the reduction gear (A) and a transmission belt (13a, 13b) of the auxiliary transmission (13) are arranged on the reduction gear (A) side with respect to the transmission (B). Sub-transmission clutch (1 c, and a clutch lever (64) to turn on and off operation of the traveling transmission by operating the 13d), and a reduction device (mobile agricultural machine arranged on the side which is disposed eccentrically to A).
[0005]
[Action and effect of the invention]
As described above, the invention of claim 1 effectively uses the input shaft 19 and the planting drive shaft 32 that are absolutely necessary for a mobile agricultural machine for rice transplanters, and the rotational power of the input shaft 19 is increased. A speed reduction device A is configured which can change speed and transmit the speed reduction to the speed change shaft 20. The input shaft 19 is supported laterally by a needle bearing provided at an end of the input shaft 19. Since the transmission shaft 20 that is in an axially aligned state is installed and the transmission shaft 20 is provided with the low-speed main transmission gear 35 and the high-speed main transmission gear 34 that control the transmission , the reduction gear A and the main transmission B are moved left and right. The transmission case 18 could be arranged in parallel, and the transmission case 18 was shortened in the front-rear length to have a simple configuration, so that it was possible to realize a light-weight and low-cost super-deceleration transmission.
[0006]
Also, as described above, the side left and offset to one of the transmission case 18, the deceleration device A, and are collectively arranged clutch lever 64 to turn on and off operation super deceleration lever 62, and the traveling transmission, strains shift the Since the two large and small gears 36a and 36b and the inter-stock shift first large and small gears 33a and 33b are arranged on the reduction gear A side with respect to the main transmission B , the super-operator in a state where the operator has descended from the airframe. The overpass operation at the time of decelerating can be performed from one of the left and right sides of the machine body, so that the operation for overpass can be simplified and the operation can be performed safely and easily.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the mobile agricultural machine will be described.
As shown in FIGS. 1 to 3, the mobile agricultural machine 1 has an engine 3 mounted in the center of the body frame 2, a steering seat 4 is provided on the upper side of the engine 3, and a steering handle 5 is provided on the front side of the body frame 2. Left and right front wheels 6, 6 on the left and right sides of the front, left and right rear wheels 7, 7 on the left and right sides of the rear, and a rice transplanter 8 that can be moved up and down freely ing.
[0008]
As shown in FIGS. 2 and 3, the traveling mission device 9 is configured to transmit the rotational power input from the engine 3 to the left / right front wheels 6, 6 and the left / right rear wheels 7, 7. 2 on the front side.
1 and 2, the main clutch device 11 includes a transmission belt 11a provided between the engine 3 and the intermediate input shaft 12 of the traveling mission device 9, and a belt tension for tensioning / relaxing the transmission belt 11a. And a main clutch lever (not shown) for intermittently operating the clutch 11b.
[0009]
The auxiliary transmission 13 alternatively tensions the high / low auxiliary transmission belts 13a, 13b and the high / low auxiliary transmission belts 13a, 13b provided between the intermediate input shaft 12 and the input shaft 19 of the transmission case 18. The belt tension type auxiliary transmission clutches 13c and 13d that are relaxed and the auxiliary transmission lever 60 that intermittently operates the auxiliary transmission clutches 13c and 13d, and the input shaft 19 is transmitted at high speed or low speed.
[0010]
The main clutch lever (not shown) and the auxiliary transmission lever 60 are normal tension clutch operation levers that are pressed by a tension spring (not shown) on the entry side and manually operated on the cut side. The main clutch lever (not shown) and the sub-transmission lever 60 can be locked by a lock device (not shown) in a state where the clutch is moved to the disengaged position. The main clutch lever (not shown) and the auxiliary transmission lever 60 may be configured as a foot pedal.
[0011]
The traveling mission device 9 is configured as shown in FIG. In the transmission case 18, the main transmission shaft 20 (the left end of the main transmission shaft 20) that is axially aligned with the input shaft 19, the planting drive shaft 32, and the right side of the input shaft 19 from the transmission upper side. Are supported via a needle bearing at the right end of the input shaft 19.), a clutch shaft 21, a front wheel brake shaft 22, a front wheel differential 23, and a left / right wheel transmission shaft 24 in this order. ing.
[0012]
In addition, high and low input pulleys 25 a and 25 b are attached to the outside of the input shaft 19 to input rotational power, and an input gear 26 is provided inside the transmission case 18 of the input shaft 19. A large-diameter reduction first gear 27 and a small-diameter reduction second gear 28, which are integrally formed, are provided on the left side of the planting rod drive shaft 32 via bearings so as to be freely rotatable.
[0013]
A small-diameter gear 29 and a large-diameter gear 30 that are integrally formed are attached to the left end portion of the main transmission shaft 20 so as to be slidable in the axial direction, and are slid by the super-deceleration shifter device 31. It has a configuration. When sliding to the left, the small-diameter gear 29 meshes with the first reduction gear 27, and the constant speed rotational power of the input shaft 19 is transmitted to the main transmission shaft 20, and when sliding to the right, the large diameter The reduction gear A is configured such that the gear 30 is engaged with the reduction second gear 28 and the reduced rotational power is transmitted to the main transmission shaft 20.
[0014]
Further, the first large and small gear shifts 33a and 33b having slightly different diameters are attached to the right side portions of the small diameter gear 29 and the large diameter gear 30 of the main transmission shaft 20, and an integral small diameter is mounted on the right side portion thereof. The low-speed main transmission gear 35 and the large-diameter high-speed main transmission gear 34 are slidably mounted on the shaft.
On the right side portions of the speed reduction second gear 28 and the speed reduction first gear 27 of the planting drive shaft 32, integral stock shift second large / small gears 36a and 36b having slightly different diameters are slidably attached. When the inter-stock shift second large / small gears 36a, 36b are moved to the left side, the inter-stock shift first large gear 33a and the inter-stock shift second small gear 36b are engaged, and the inter-stock shift second large / small gears 36a, 36b are engaged. When moving to the right, the inter-stock shift first small gear 33b and the inter-stock shift second large gear 36a mesh with each other, and the rotational power of the main transmission shaft 20 is slightly shifted and transmitted to the planting drive shaft 32. It is a configuration in which the amount between stocks is changed.
[0015]
Further, a second inter-gear shift device 37 is provided at the right end of the planting drive shaft 32 and the main transmission shaft 20, and further, inter-gear transmission is performed, and power is transmitted to the planting transmission shaft 39 via the gear 38. Is transmitted.
As shown in FIG. 3, a center gear 42 having a large gear 40 and a small gear 41 is attached to the center of the clutch shaft 21, and the small gear 41 of the center gear 42 meshes with the high-speed main transmission gear 34. In addition, the large gear 40 of the center gear 42 is configured to selectively mesh with the low-speed main transmission gear 35.
[0016]
On both sides of the center gear 42, left and right side clutch devices 43, 43 are provided in which left and right side clutch gears slidable in the axial direction are provided so as to be freely disengaged. Then, outside the left and right side clutch devices 43, 43, left and right side brake devices 44, 44 configured in a cone type or a disc type are provided respectively, and after the left and right side clutches are disengaged, Furthermore, if the movement to the outside is continued, the brake is activated, and the braking force is applied to the left and right side clutch gears.
[0017]
As shown in FIG. 3, the front wheel brake shaft 22 is engaged with the transmission large gear 46 that meshes with the small gear 41 and the transmission differential of the front wheel differential device 23 that meshes with the large gear 40 and that is on the lower transmission side. A small transmission gear 45 that meshes with the gear 23a is attached to a shaft, and a brake device 47 is configured on one side of the front wheel brake shaft 22 so as to be operable from the outside.
[0018]
The left and right front wheels 6 and 6 are provided with cases of left and right lateral transmission shafts 48 and 48, left and right longitudinal transmission shafts 49 and 49, and left and right longitudinal transmission shafts 49 and 49 from the front wheel differential 23. Rotational power and braking force from the front wheel brake shaft 22 can be transmitted via left and right front wheel transmission devices 50 and 50 that are fitted and supported on the lower end side so as to be steerable and turnable.
The front wheel differential device 23 includes a differential lock claw (not shown), and the left and right front wheels 6 and 6 can be prevented from being differentially operated by the differential lock claw (not shown). This differential lock claw (not shown) is configured to be operated in association with the operation of the super-deceleration shifter device 31 so that the vehicle travels at an ultra-low speed. This prevents dangers such as a decrease in driving force due to the differential movement of the left and right front wheels 6 and 6 when the vehicle crosses over, a sudden change in the forward direction of the aircraft, or a fall.
[0019]
Rotational power transmitted from the left and right side clutch devices 43 and 43 to the left and right rear wheels 7 and 7 via the left and right wheel gears 53 and 53 is transmitted to the left and right wheel transmission shafts 24 and 24. Further, the left and right rear wheel transmission shafts 52 and 52 are used for transmission. Thus, the left and right rear wheels 7 and 7 are transmitted with power by the left and right side clutch devices 43 and 43 and the braking force based on the left and right side brake devices 44 and 44.
[0020]
The left and right clutch pedals 55 and 55 have the same configuration as that of the known configuration, and are arranged at a position deviated to the right side on the front side of the control seat 4, and the left and right side clutch devices 43 and 43 and the left and right side are arranged. The brake devices 44 and 44 are operably connected. As shown in FIG. 5, the left and right clutch pedals 55 and 55 are configured such that the left and right clutch pedals 55 and 55 can be connected by a detachable linkage 56.
[0021]
Next, the transmission state of the above configuration will be described.
First, when the main clutch lever (not shown) is operated to the in-position, the rotational power of the engine 3 is transmitted to the high / low input pulleys 25a and 25b via the main clutch device 11 and the auxiliary transmission device 13, and the traveling mission device 9 To the input shaft 19.
Subsequently, the rotational power is transmitted from the input gear 26 of the input shaft 19 to the first reduction gear 27, the small-diameter gear 29, the high-speed main transmission gear 34 (or the low-speed main transmission gear 35), and the small gear 41 (or the center gear 42) of the center gear 42. The normal rotational power is transmitted via the large gear 40), and the traveling speed and the normal traveling speed are performed.
[0022]
Next, the transmission path to one of the left and right rear wheels 7 and 7 will be described. The rotational power is transmitted to the lower side by the left and right side clutch devices 43 and 43 engaged with both sides of the center gear 42. The left and right rear wheels 7 are transmitted to the left and right wheel gears 53 and 53 of the left and right wheel transmission shafts 24 and 24, and then the rotational power is further extended to the rear via the left and right rear wheel transmission shafts 52 and 52. , 7.
[0023]
Rotational power to the other left and right front wheels 6 and 6 is transmitted from the small gear 41 of the center gear 42 to the transmission large gear 46 (or from the large gear 40 to the transmission small gear 45), the front wheel brake shaft 22, the transmission small gear 45, The transmission gear 23a, the front wheel differential 23, the left / right lateral transmission shafts 48, 48, the left / right longitudinal transmission shafts 49, 49, and the left / right front wheel transmission device 50 are sequentially transmitted to the left / right front wheels 6, 6 is transmitted.
[0024]
Next, a description will be given of a transmission state in which the reduction gear A configured by the large-diameter first reduction gear 27, the small-diameter reduction second gear 28, the small-diameter gear 29, and the large-diameter gear 30 is decelerated and shifted.
The small-diameter gear 29 and the large-diameter gear 30 are slid rightward by the super-deceleration shifter device 31, and the large-diameter gear 30 is engaged with the second reduction gear 28. Then, the reduced rotation is transmitted from the small-diameter second reduction gear 27 to the large-diameter gear 30, the main transmission shaft 20 rotates at a reduced speed, and the center gear 42 rotates at a reduced speed through the low-speed main transmission gear 35 and the large gear 40. To do. Thus, the following transmission path is transmitted to the left and right rear wheels 7 and 7 and the left and right front wheels 6 and 6 in the same manner as described above, and travels at an extremely low speed. At this time, a differential lock claw (not shown) of the front wheel differential device 23 is operated in a related manner, and the left and right front wheels 6 and 6 are locked so as not to be differentially operated.
[0025]
As described above, the speed reduction device A is provided by effectively using the input shaft 19 and the planting rod drive shaft 32, and the main transmission shaft 20 arranged in a state where the shaft centers coincide with the side of the input shaft 19 is high and low. Since the main transmission B consisting of the main transmission gears 35 and 34 is provided, a super-reduction transmission that is light in weight and low in cost can be realized with a simple configuration.
Next, the configuration of the operation levers will be described.
[0026]
The main transmission lever 58 for operating the high and low speed main transmission gears 34 and 35 constituting the main transmission B is provided on the left side of the handle 5 in the handle post 59 as shown in FIG. The operation speed position, neutral position, and reverse position can be operated. Similarly, the sub-transmission lever 60 for operating the sub-transmission device 13 is also provided on the left side of the handle 5, and can be operated to a high speed position and a low speed position. An inter-stock shift lever 61 is also provided on the left side of the handle 5.
[0027]
A deceleration lever 62 for operating the reduction gear A is provided on the left side of the aircraft, and left and right clutch pedals 55 and 55 are similarly provided on the left side of the aircraft. A clutch lever 64 is provided on the side of the left and right clutch pedals 55, 55, and the clutch lever 64 is linked to the auxiliary transmission clutches 13 c, 13 d, and both the auxiliary transmission clutches 13 c, 13 d are not operated by operating the clutch lever 64. It is the structure which can cut | disconnect driving | running | working transmission in an action state. The clutch lever 64 is linked to a clutch pedal 70 provided at a position deviated to the left on the front side of the control seat 4, and the clutch pedal 70 of the clutch pedal 70 is operated during normal operation while the operator is sitting on the control seat 4. Can be operated by stepping on. The release lever 65 provided in the clutch lever 64 is configured to be able to be locked at the position where the clutch lever 64 is lowered, that is, the transmission cut position. In addition, an L-shaped heel overarm 63 is provided at the front of the machine body. The heel overarm 63 is configured to be changeable between a storage position indicated by a solid line and a use position projected forward indicated by a virtual line.
[0028]
Therefore, when the mobile agricultural machine 1 is decelerated and transmitted over the eaves, the sub-transmission lever 60 is operated to the low speed position to switch to the low speed transmission, and the main transmission lever 58 is operated to the work speed position and the main transmission B. Switch to low speed. Next, the operator gets off the mobile agricultural machine 1 and is positioned on the front / left side of the machine body, operates the deceleration lever 62 to the deceleration position, switches A to the deceleration side, and then transmits the clutch lever 64. Operate from the cut position to the transmission position. Thus, the mobile agricultural machine 1 is advanced at an ultra-low speed, and the operator causes the heel overarm 63 to pass over the heel while preventing the front of the machine body from lifting.
[0029]
Therefore, since the operator can operate the deceleration lever 62 and the clutch lever 64 from the front side and the left side portion of the machine while getting off the mobile farm machine 1, when performing both of these operations, the operator moves the machine. The decelerating lever 62 and the clutch lever 64 can be operated without having to move around the aircraft so as to bypass and move to the left or right of the aircraft or board the aircraft once.
[0030]
The clutch lever 64 and the brake device 47 of the front wheel brake shaft 22 are connected via an interlocking member 66. Therefore, if the clutch lever 64 is operated to the transmission cut position during overrunning, the left and right front wheels 6, The brake is actuated in relation to No. 6, and the mobile agricultural machine 1 passing over the fence is stopped at that position, so that the movement to the lower side of the slope can be prevented, and safety can be ensured.
[Brief description of the drawings]
FIG. 1 is an overall side view of a mobile agricultural machine.
FIG. 2 is an overall plan view in which a part of the mobile agricultural machine is omitted.
FIG. 3 is a developed sectional view of a traveling mission device.
FIG. 4 is an overall plan view of a mobile agricultural machine.
FIG. 5 is a plan view of a main part.
FIG. 6 is a plan view of a main part.
FIG. 7 is a plan view with a part cut away of a main part.
FIG. 8 is a side view of the main part.
FIG. 9 is an enlarged view of a main part of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mobile farm machine, 2 ... Body frame, 3 ... Engine, 4 ... Steering seat, 5 ... Handle, 6 ... Left / right front wheel, 7 ... Left / right rear wheel, 8 ... Rice transplanter, 9 ... Traveling mission device, 11 ... main clutch device, 11a ... transmission belt, 11b ... clutch, 12 ... intermediate input shaft, 13 ... sub-transmission device, 15 ... engine output belt, 18 ... transmission case, 19 ... input shaft, 20 ... main transmission shaft, 21 ... Clutch shaft, 22 ... front wheel brake shaft, 23 ... front wheel differential, 23a ... transmission differential gear, 24 ... left / right wheel transmission shaft, 25 ... input pulley, 26 ... input gear, 27 ... reduction first gear, 28 ... Reduction second gear, 29 ... Small diameter gear, 30 ... Large diameter gear, 31 ... Super deceleration shifter, 32 ... Planting rod drive shaft, 33a ... Stock shift first large gear, 33b ... Stock shift first small gear, 34 ... High-speed main transmission gear, 35 ... Low-speed main change Gear, 36a ... Stock shift second large gear, 36b ... Stock shift second small gear, 37 ... Stock shift second device, 38 ... Gear, 39 ... Planting transmission shaft, 40 ... Large gear, 41 ... Small gear, 42 ... center gear, 43 ... left / right side clutch device, 44 ... left / right side brake device, 45 ... small transmission gear, 46 ... large transmission gear, 47 ... brake device, 48 ... left / right lateral transmission shaft, 49 ... Left / Right vertical transmission shaft, 50 ... Left / Right front wheel transmission device, 52 ... Left / Right rear wheel transmission device, 53 ... Left / Right wheel gear, 55 ... Left / Right clutch pedal, 56 ... Ridge, 57 ... Operation lever 58, main transmission lever 59, handle post, 60, auxiliary transmission lever, 61 ... inter-stock transmission lever, 62 ... deceleration lever, 63 ... arm over arm, 64 ... clutch lever, 65 ... release lever, 66 ... interlocking member A ... Deceleration device, B ... Main transmission

Claims

The power from the engine (3) is transmitted to the traveling wheels consisting of the left and right front wheels (6) and the rear wheels (7) via the auxiliary transmission (13) and the transmission case (18). 8) is a mobile agricultural machine that can be freely moved up and down, and in the mission case (18) , an input shaft (19) and a planting drive shaft (32) are arranged in parallel and mounted on the input shaft ( the horizontal side 19) bridged the input shaft (19) via a needle bearing provided on the end portion is bearing the input shaft and (19) shifting axis as the axis match state (20), the input The shaft (19) is provided with an input gear (26), and the planting drive shaft (32) is provided with a reduction first gear (27) and a reduction second gear (28) so as to be freely rotatable, and the inter-stock shift second large / small Gears (36a, 36b) are slidably provided, and a small-diameter gear (2 ) And a large-diameter gear (30), a low-speed main transmission gear (35), and a high-speed main transmission gear (34) are provided slidably in the axial direction, and the inter-stock transmission first large / small gear (33a, 33b) Is provided, and is transmitted from the input shaft (19) to the reduction first gear (27) via the input gear (26), and the small diameter gear (29) and the large diameter gear (30) are slid to reduce the small diameter. From the state in which the gear (29) meshes with the reduction first gear (27) and is transmitted to the transmission shaft (20) via the small diameter gear (29), the large diameter gear (30) is connected to the reduction first gear (27). A reduction gear transmission (A) that can be reduced and transmitted in a state of being engaged with the integral second reduction gear (28) and being transmitted to the transmission shaft (20) via the large diameter gear (30) is configured. -By shifting the small gears (36a, 36b), the second small shift between stocks (36b) meshes with the first inter-gear transmission first large gear (33a) and is transmitted from the transmission shaft (20) to the planting drive shaft (32) via the second inter-gear transmission second small gear (36b); A state in which the second large gear (36a) meshes with the inter-stock transmission first small gear (33b) and is transmitted from the transmission shaft (20) to the planting drive shaft (32) via the inter-stock transmission second large gear (36a). And a center gear (42) having a large gear (40) and a small gear (41) is provided, and a low-speed main transmission gear (35) and a high-speed main transmission gear (34). , The low-speed main transmission gear (35) meshes with the large gear (40) and is transmitted from the transmission shaft (20) to the traveling wheel, and the high-speed main transmission gear (34) is the small gear (41). In the state of being transmitted to the traveling wheel from the transmission shaft (20) Main transmission (B) that can be switched to the state, from the front wheel differential (23) to which the power from the center gear (42) is input, the left and right lateral transmission shaft (48) and the lower end of the transmission case (18) The left and right front wheels (6) supported on the side are transmitted to the left and right front wheels (6), and the speed reducer (A) is displaced to either the left or right side of the transmission case (18). The inter-stock shift second large / small gear (36a, 36b) and the inter-stock shift first large / small gear (33a, 33b) are disposed on the reduction gear (A) side with respect to the main transmission (B). Then, the super-deceleration lever (62) for switching the reduction gear (A) and the auxiliary transmission clutch (13c, 13d) for tensioning / relaxing the transmission belt (13a, 13b) of the auxiliary transmission (13) are operated. Clutch for turning on / off the driving force Bar (64) and a reduction gear (A) mobile agricultural machine is arranged on the side which is disposed deviated a.