JP3549830B2

JP3549830B2 - Mobile farm tread adjustment device

Info

Publication number: JP3549830B2
Application number: JP2000339912A
Authority: JP
Inventors: 省二寺元; 幸広福田
Original assignee: セイレイ工業株式会社
Priority date: 2000-11-08
Filing date: 2000-11-08
Publication date: 2004-08-04
Anticipated expiration: 2016-03-27
Also published as: JP2001171305A

Description

【０００１】
【発明が属する技術分野】
本発明は、球葱や人参などの根菜作物を圃場から掘り取る収穫機など移動農機のトレッド調整技術に関する。
【０００２】
【発明が解決しようとする課題】
一般に畦を跨いで走行しながら収穫作業を行う収穫機にあっては、畦幅に応じて左右の駆動車輪のトレッド調整を行う必要があるが、これを特別なシリンダ等の駆動部材を用いて行うと、コスト面で不利になる問題があった。
【０００３】
【課題を解決するための手段】
然るに、本発明は、請求項１に示す如く、駆動車輪に動力を伝達する伝動軸の回転運動を直線運動に変換して伝動軸とその伝動軸を内挿する伝動ケース及び後部横連結パイプに対してスライド部を伸縮させるねじ機構を備えると共に、前記伝動軸は、軸方向の摺動を許容して回転を伝える二重構造で中空の伸縮伝動軸とし、駆動軸に連結する内軸と、駆動車輪に連結する外軸から成り、前記ねじ機構は、前記伝動軸の中空に備え、内軸に形成するめねじと、外軸に内挿させてめねじに螺着させるおねじを外面に形成するおねじ軸とから成り、このおねじ軸をブレーキ機構によりロックすることによりねじ機構を働かせ、伝動軸の回転方向の切換えによってトレッドの拡大と縮少の切換えを行うことを特徴とする。
【０００４】
また、請求項２に示す如く、ブレーキ機構は、伝動軸を内挿する伝動ケースに連設するファイナルケースに構成し、ブレーキドラムに連結するおねじ軸をファイナルケースにロックすることを特徴とする。
【０００５】
また、請求項３に示す如く、ミッションケースから左右に延設する左右の伝動ケースと、各伝動ケースに連設する左右のファイナルケースと、各ファイナルケースに車軸を介して軸支する左右の駆動車輪とを備える移動農機のトレッド調整装置において、伝動ケースの一端側から中空パイプ状のスライド受部を同一軸芯上で機体一側に一体延設し、このスライド受部に中空パイプ状のスライド部を出入自在に嵌合させ、このスライド部の一端にファイナルケースを連結し、またスライド受部とスライド部に軸方向の摺動を許容して回転を伝える二重構造で中空の伸縮伝動軸を内挿し、伸縮伝動軸の内軸の一端に伝動ケースに内挿される駆動軸の一端を連結すると共に、伸縮伝動軸の外軸の一端にファイナルケースに内蔵される伝動機構を介して駆動車輪を連結し、少なくとも一方の伝動ケース並びにその伝動ケースに内挿される伸縮伝動軸を伸縮自在な構造とし、前記伸縮伝動軸の中空に該軸の回転を直線運動に変換するためのねじ機構を備え、該ねじ機構は内軸の一端内面に形成するめねじと、外軸に内挿させてめねじに螺着させるおねじを外面に形成するおねじ軸とから成り、このおねじ軸を外軸を貫通させてファイナルケースに構成するブレーキ機構のブレーキドラムに連結させ、ブレーキ機構によりおねじ軸をファイナルケースにロックすることにより、伸縮伝動軸の回転運動を直線運動に変換してファイナルケースに与え、少なくとも一方の伝動ケース並びにその伝動ケースに内挿される伸縮伝動軸を伸縮させることを特徴とする。
【０００６】
【発明の実施の形態】
以下、本発明の実施例について図面を参照して説明する。図１は全体の側面図、図２は同平面図、図３は同正面図、図４は伝動系統図、図５、図６、図７は作業状態説明図であり、自走車輛（１）と作業部（２）とで形成し、歩行型構造を構成している。前記自走車輛（１）は、エンジン（３）と、その出力部に連動する伝動機構を内装したミッションケース（４）と、ミッションケース（４）から左右に延設する伝動ケース（５）（６）と、各伝動ケース（５）（６）に連設する左右のファイナルケース（７）（８）と、各ファイナルケース（７）（８）に車軸（９ａ）（１０ａ）を介して軸支する駆動車輪（９）（１０）と、エンジン（３）、ミッションケース（４）、作業部駆動ケース（４ａ）を後部に一体に取付ける機体フレーム（１１）と、一方の駆動車輪（９）の前方延長線上に配置してフレーム（１１）に昇降調節可能に取り付けるゲージホイル（１２）と、フレーム（１１）から後上方に延設する操縦ハンドル（１３）などで構成されている。
【０００７】
また、右のファイナルケース（８）及び右の駆動車輪（１０）は、図２及び図３にみられるように、左のファイナルケース（７）及び駆動車輪（９）よりも大きく機体右側方に偏寄して設けることによって、双方の駆動車輪（９）（１０）が畦（１４）の両側の谷部を移行できるように形成している。また、一方のファイナルケース（８）及び駆動車輪（１０）を支持する伝動ケース（６）とそれに内蔵される伝動機構、並びに両端に左右のファイナルケース（７）（８）をアーム（７０）（７１）を介して連結している機体フレーム（１１）の後部横連結パイプ（７２）に対して伸縮自在な構造とし、右のファイナルケース（８）及び右の駆動車輪（１０）を車軸方向に移動させ、左右車輪（９）（１０）間隔（トレッド）を変更させ、畦（１４）幅の異なりに応じて駆動車輪（１０）の位置を調節し、畦（１４）を跨いで走行するように構成している。
【０００８】
さらに、機体フレーム（１１）に種々の構成要素を組付けて作業部（２）が構成されるもので、作業部（２）は、前低後高に傾設される引抜き搬送部材（１６）と引抜き搬送部材（１６）の下方にあって引抜き搬送部材（１６）よりも緩い傾斜角度で設けられる下部搬送装置（１７）とからなる移送装置（１８）と、畦（１４）に列状に植立する玉ネギなどの根菜作物（１９）群を掘り取る掘取装置（２０）と、下部搬送装置（１７）の移送中途部で引抜き搬送部材（１６）よりも下方部位に配設する切断装置（２１）とを備え、これらによって根菜作物（１９）を収穫する作業部（２）が構成されている。
【０００９】
引抜き搬送部材（１６）は、左右に並設した軟弾性の搬送無端帯（２３）（２３）を各々掛回張設し、両搬送無端帯（２３）（２３）間に形成される挾持移送経路に前記根菜作物（１９）の茎葉部（１９ａ）の先端寄り部分を挾持して移送するように構成される。また、左の引抜き搬送部材（１６）の移送終端部には、図２にみられるように平面視で左横側方に屈曲形成させた茎葉放出装置（２４）を設け、根菜作物（１９）が畦（１４）上面に放出されるのに対して切断分離した茎葉部（１９ａ）を畦（１４）左側の谷部に放出させるように構成している。
【００１０】
また、引抜き搬送部材（１６）の搬送始端側には、弾性搬送突起（２５ａ）…付の無端帯（２５）（２５）を備えた左右一対の掻込み部材（２６）（２６）が装設されると共に、掻込み部材（２６）（２６）の進行方向前方部位には、畦（１４）に植立する複数列の根菜作物（１９）の茎葉部（１９ａ）を左右に分け捌くための縦回し型分草引起し部材（２７）が装設されており、また各分草引起し部材（２７）の下部には先端側を各列の根菜作物（１９）間の地中部分に突入させて進行させ、根菜作物（１９）の根切りと土割りを縦方向に行う縦根切り棒（５２）が設けられ、さらに、引抜き搬送部材（１６）の搬送始端部の下方部位には、縦回し型分草引起し部材（２７）間に導入される根菜作物（１９）の地中部分の適宜下方部位を掘削しながら進行する掘取り装置（２０）が設けられ、その掘取装置（２０）は、正面視Ｌ字形の左右一対の振動ブレード（２８）（２８）を備えている。
【００１１】
一方、下部搬送装置（１７）は、図８に示す如く、左右一対の軟弾性搬送無端帯（２９）（２９）が形成する挾持移送経路によって前記根菜作物（１９）の首部（１９ｂ）を挾持して移送するように構成されるものであり、下部搬送装置（１７）の移送終端部を放出コンベア（３０）の移送中間部上方に臨ませ、下部搬送装置（１７）下方側に吊下げた作物（１９）を放出コンベア（３０）上面に受取ると共に、下部搬送装置（１７）移送終端部の横倒ホイル（３１）及び横倒ガイド（３２）によって作物（１９）の首部（１９ｂ）を左側方に倒し、放出コンベア（３０）上の一側に形成する凹部（３０ａ）に作物（１９）の球部を入り込ませた状態で左方向に横倒し姿勢に支持させ、作物（１９）を左方向に倒した姿勢で畦（１４）上面に落下させるように構成している。
【００１２】
また、下部搬送装置（１７）の上方で引抜き搬送部材（１６）よりも下方の部位には、下部搬送装置（１７）により首部（１９ｂ）を挾持されかつ引抜き搬送部材（１６）によって茎葉部（１９ａ）を挾持されている根菜作物（１９）の茎葉部（１９ａ）を切り離すための電動モータ（２１ａ）で駆動される切断装置（２１）が配設されるもので、該切断装置（２１）は、図示のもののように回転刃を駆動する構造でもよく、またレシプロ刃等の駆動型切断刃であってもよい。
【００１３】
以上のように組成される作業部（２）の構成要素のうち、動力で駆動されるもの、すなわち、移送装置（１８）の引抜き搬送部材（１６）と下部搬送装置（１７）および移送装置（１８）の前部に連係装設される掻込み部材（２６）（２６）と縦回し型分草引起し部材（２７）、掘取装置（２０）、などは、図４に示すような伝動構造でもって駆動されるもので、ミッションケース（４）からクラッチ（３３）を介して前方に延設される作業出力軸（３４）が前後方向の伝動筒（３５）内を経て作業部駆動ケース（４ａ）に突入され、作業部駆動ケース（４ａ）に内挿されている駆動軸（３６）に連動連結されている。
【００１４】
そして、前記駆動軸（３６）にウォーム（３７）及びウォームホイール（３８）を介して連動連結した上部搬送駆動軸（３９）を上向きに突設し、上部搬送駆動軸（３９）でもって引抜き搬送部材（１６）における左右一対の軟弾性搬送無端帯（２３）（２３）を各々所定の方向に回転駆動すると共に、掻込み部材（２６）（２６）は、前記軟弾性搬送無端帯（２３）（２３）を掛回する輪体を備えた前方軸（４０）（４０）で共通に回転駆動するようにしてあり、下部搬送装置（２９）（２９）も前方軸（４０）（４０）に連動連結した伝動軸（４１）（４１）でもって回転駆動するように構成している。
【００１５】
さらに、駆動軸（３６）の左右端部にはクランク（４２）（４２）が設けられ、それぞれに後方端部を接続したピットマン（４３）（４３）の前端部を、掘取装置（２０）の振動ブレード（２８）（２８）に接続して振動ブレード（２８）（２８）を前後方向に往復振動させるもので、振動ブレード（２８）（２８）は、支点軸（４５）でもってフレーム（１１）に取り付けられ、支点軸（４５）を中心にしてその上方部分と下方部分とが背反に前後揺動するようになっている。
【００１６】
また、前記駆動軸（３６）にベベルギヤ（４６）などを介して放出コンベア（３０）を連結させると共に、左側の搬送無端帯（２３）に茎葉放出装置（２４）を連結させている。
【００１７】
さらに、前後方向に略水平に延設させる引起し入力軸（４７）の後端を前記駆動軸（３６）右側端にベベルギヤ（４８）を介して連結させると共に、２条分３本の引起し部材（２７）…を駆動する引起し駆動軸（４９）の右側端にベベルギヤ（５０）を介して引起し入力軸（４７）の前端を連結させている。
【００１８】
また、図９から明らかなように、右伝動ケース（６）の右端側と、後部横連結パイプ（７２）の右端側から中空パイプ状のスライド受部（８０）（８１）を同一軸芯上で機体右側に一体延設し、このスライド受部（８０）（８１）に中空パイプ状のスライド部（８２）（８３）を出入自在に嵌合させ、この各スライド部（８２）（８３）の右端に右のファイナルケース（８）を連結するもので、スライド部（８２）（８３）をスライド受部（８０）（８１）に対する出入れによって右の伝動ケース（６）及び後部横連結パイプ（７２）を固定側とすることで、右のファイナルケース（８）と駆動車輪（１０）が車軸方向に移動できる、即ちトレッドが調整できるようになっている。
【００１９】
図１０に示す如く、上記のトレッド調整は右の駆動車輪（１０）の駆動力を利用して行うもので、左右の伝動ケース（５）（６）に内挿される駆動軸（８４）の左端に左のファイナルケース（７）に内蔵されるチェン伝動機構（８５）を介して左の車軸（９ａ）を連動連結し、ミッションケース（４）より左の駆動車輪（９）に動力を伝達する一方、スライド受部（８０）とスライド部（８２）に軸方向の摺動を許容して回転を伝えることができる二重構造で中空の伸縮伝動軸（８６）を内挿し、伸縮伝動軸（８６）の内軸（８６ａ）の左端を駆動軸（８４）の右端に連動連結すると共に、伸縮伝動軸（８６）の外軸（８６ｂ）右端に右のファイナルケース（８）に内蔵されるチェン伝動機構（８７）を介して右の車輪（１０）を連動連結し、ミッションケース（４）より右の駆動車輪（１０）に動力を伝達する構造とし、前記伸縮伝動軸（８６）の中空に該軸（８６）の回転を直線運動に変換するためのねじ機構（８８）を備え、該ねじ機構（８８）は内軸（８６ａ）の右端内面に形成するめねじ（８９）と、外軸（８６ｂ）に内挿されめねじ（８９）に螺着させるおねじ（９０）を外面に形成するおねじ軸（９１）とから成り、このおねじ軸（９０）を外軸（８６ｂ）を貫通させて右のファイナルケース（８）の外側に構成するブレーキ機構（９２）のブレーキドラム（９３）に連結させ、ブレーキ機構（９２）をオンとしておねじ軸（９１）右のファイナルケース（８）にロックすることにより、ねじ機構（８８）を働かせ、伸縮伝動軸（８６）の回転を直線運動に変換して右のファイナルケース（８）に与え、トレッド調節を行うように構成している。
【００２０】
尚、伝動軸（８４）の回転方向の切換えによってトレッドの拡大と縮少の切換えが行えると共に、伸縮伝動軸（８６）内にねじ機構（８８）、即ちトレッド伸縮装置が構成できコンパクトであり、過負荷となったときは、ブレーキ機構（９２）部での滑りにより負荷が抜けるので伝動機構の損傷を防止でき、また各部品を小さくでき、さらにブレーキを加減することにより右のファイナルケース（８）の押引き力及びスピードを調整できるので、トレッドの微調節も可能となり操作性に秀れるものである。
【００２１】
【発明の効果】
以上実施例から明らかなように本発明は、請求項１に示す如く、駆動車輪（９）（１０）に動力を伝達する伝動軸（８６）の回転運動を直線運動に変換して伝動軸（８６）とその伝動軸（８６）を内挿する伝動ケース（６）及び後部横連結パイプ（７２）に対してスライド部（８２）（８３）を伸縮させるねじ機構（８８）を備えると共に、前記伝動軸（８６）は、軸方向の摺動を許容して回転を伝える二重構造で中空の伸縮伝動軸とし、駆動軸（８４）に連結する内軸（８６ａ）と、駆動車輪（１０）に連結する外軸（８６ｂ）から成り、前記ねじ機構（８８）は、前記伝動軸（８６）の中空に備え、内軸（８６ａ）に形成するめねじ（８９）と、外軸（８６ｂ）に内挿させてめねじ（８９）に螺着させるおねじ（９０）を外面に形成するおねじ軸（９１）とから成り、このおねじ軸（９１）をブレーキ機構（９２）によりロックすることによりねじ機構（８８）を働かせ、伝動軸（８６）の回転方向の切換えによってトレッドの拡大と縮少の切換えを行うもので、特別なシリンダ等の駆動部材を用いることなく駆動車輪（１０）の駆動力を利用してトレッドの調整（拡大と縮少）を行うことができ、コストの増大を押さえることができると共に、コンパクト化を容易に図ることができるものである。
【００２２】
また、請求項２に示す如く、ブレーキ機構（９２）は、伝動軸（８６）を内挿する伝動ケース（６）に連設するファイナルケース（８）に構成し、ブレーキドラム（９３）に連結するおねじ軸（９１）をファイナルケース（８）にロックするもので、ねじ機構（８８）に対する伝動軸（８６）の回転運動を継断自在に伝達するブレーキ機構（９２）をねじ軸（９１）の端部に設け、過負荷をブレーキ機構（９２）で吸収できると共に、摩耗等に対しても交換が容易でメンテナンス性に秀れるこのである。
【００２３】
また、請求項３に示す如く、ミッションケース（４）から左右に延設する左右の伝動ケース（５）（６）と、各伝動ケース（５）（６）に連設する左右のファイナルケース（７）（８）と、各ファイナルケース（７）（８）に車軸（９ａ）（１０ａ）を介して軸支する左右の駆動車輪（９）（１０）とを備える移動農機のトレッド調整装置において、伝動ケース（６）の一端側から中空パイプ状のスライド受部（８０）を同一軸芯上で機体一側に一体延設し、このスライド受部（８０）に中空パイプ状のスライド部（８２）を出入自在に嵌合させ、このスライド部（８２）の一端にファイナルケース（８）を連結し、またスライド受部（８０）とスライド部（８２）に軸方向の摺動を許容して回転を伝える二重構造で中空の伸縮伝動軸（８６）を内挿し、伸縮伝動軸（８６）の内軸（８６ａ）の一端に伝動ケース（６）に内挿される駆動軸（８４）の一端を連結すると共に、伸縮伝動軸（８６）の外軸（８６ｂ）の一端にファイナルケース（８）に内蔵される伝動機構（８７）を介して駆動車輪（１０）を連結し、少なくとも一方の伝動ケース（６）並びにその伝動ケース（６）に内挿される伸縮伝動軸（８６）を伸縮自在な構造とし、前記伸縮伝動軸（８６）の中空に該軸（８６）の回転を直線運動に変換するためのねじ機構（８８）を備え、該ねじ機構（８８）は内軸（８６ａ）の一端内面に形成するめねじ（８９）と、外軸（８６ｂ）に内挿させてめねじ（８９）に螺着させるおねじ（９０）を外面に形成するおねじ軸（９１）とから成り、このおねじ軸（９１）を外軸（８６ｂ）を貫通させてファイナルケース（８）に構成するブレーキ機構（９２）のブレーキドラム（９３）に連結させ、ブレーキ機構（９２）によりおねじ軸（９１）をファイナルケース（８）にロックすることにより、伸縮伝動軸（８６）の回転運動を直線運動に変換してファイナルケース（８）に与え、少なくとも一方の伝動ケース（６）並びにその伝動ケース（６）に内挿される伸縮伝動軸（８６）を伸縮させるもので、特別なシリンダ等の駆動部材を用いることなく駆動車輪（１０）の駆動力を利用してトレッドの調整（拡大と縮少）を行うことができ、コストの増大を押さえることができると共に、コンパクト化を容易に図ることができるものである。
【図面の簡単な説明】
【図１】全体の左側面図。
【図２】同平面図。
【図３】同正面図。
【図４】駆動系統図。
【図５】作業状態説明図。
【図６】作業状態説明図。
【図７】作業状態説明図。
【図８】下部搬送装置部の平面図。
【図９】駆動車輪部の平面図。
【図１０】トレッド調節説明図。
【図１１】全体の概略正面図。
【図１２】同背面図。
【図１３】同左側面図。
【図１４】同右側面図。
【図１５】同平面図。
【図１６】同底面図。
【符号の説明】
（４）ミッションケース
（５）（６）伝動ケース
（７）（８）ファイナルケース
（９）（１０）駆動車輪
（９ａ）（１０ａ）車軸
（７２）後部横連結パイプ
（８０）スライド受部
（８２）（８３）スライド部
（８４）駆動軸
（８６）伝動軸
（８６ａ）内軸
（８６ｂ）外軸
（８７）伝動機構
（８８）ねじ機構
（８９）めねじ
（９０）おねじ
（９１）おねじ軸
（９２）ブレーキ機構
（９３）ブレーキドラム[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tread adjustment technique for a mobile agricultural machine such as a harvester for digging root crops such as onions and carrots from a field.
[0002]
[Problems to be solved by the invention]
Generally, in a harvesting machine that performs harvesting work while traveling across a ridge, it is necessary to adjust the tread of the left and right drive wheels according to the ridge width, but this is done using a special cylinder or other driving member. Doing so has a disadvantage in terms of cost.
[0003]
[Means for Solving the Problems]
However, the present invention provides a transmission shaft, a transmission case for inserting the transmission shaft, and a rear lateral connecting pipe by converting the rotational motion of the transmission shaft for transmitting power to the drive wheels into a linear motion. Along with a screw mechanism for expanding and contracting the slide portion, the transmission shaft is a hollow telescopic transmission shaft having a double structure that transmits rotation while allowing axial sliding, and an inner shaft connected to the drive shaft, An external shaft connected to a drive wheel is formed, and the screw mechanism is provided with a female screw formed on the internal shaft and a male screw inserted into the external shaft and screwed to the female screw provided in the hollow of the transmission shaft. And a locking mechanism that locks the male screw shaft with a brake mechanism to operate the screw mechanism, and switches between the expansion and contraction of the tread by switching the rotation direction of the transmission shaft.
[0004]
Further, as set forth in claim 2, the brake mechanism is configured as a final case connected to a transmission case in which the transmission shaft is inserted, and a male screw shaft connected to the brake drum is locked to the final case. .
[0005]
Further, as set forth in claim 3, left and right transmission cases extending left and right from the transmission case, left and right final cases connected to the respective transmission cases, and left and right drives pivotally supported on each final case via an axle. In a tread adjusting device of a mobile agricultural machine having wheels, a hollow pipe-shaped slide receiving portion is integrally extended from one end side of the transmission case to one body on the same axis, and a hollow pipe-shaped slide is mounted on the slide receiving portion. The sliding part is fitted freely so that the final case can be connected to one end of this slide part. The double-structured hollow telescopic transmission shaft has a double structure that transmits the rotation by allowing the slide receiving part and the slide part to slide in the axial direction. And one end of the inner shaft of the telescopic transmission shaft is connected to one end of the drive shaft inserted into the transmission case, and at the other end of the outer shaft of the telescopic transmission shaft via the transmission mechanism built in the final case. A screw mechanism for connecting the drive wheels and having at least one of the transmission case and a telescopic transmission shaft inserted in the transmission case so as to be extendable and retractable, and having the hollow of the telescopic transmission shaft convert rotation of the shaft into linear motion; The screw mechanism comprises a female screw formed on the inner surface at one end of the inner shaft, and a male screw shaft formed on the outer surface of a male screw inserted into the outer shaft and screwed to the female screw. The outer case is connected to the brake drum of the brake mechanism that constitutes the final case by passing through the outer shaft, and the male screw shaft is locked to the final case by the brake mechanism. , And at least one of the transmission cases and a telescopic transmission shaft inserted in the transmission case are expanded and contracted.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is an overall side view, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, FIG. 4 is a transmission system diagram, FIG. 5, FIG. 6, and FIG. ) And the working part (2) to form a walking type structure. The self-propelled vehicle (1) includes an engine (3), a transmission case (4) having a transmission mechanism interlocked with an output portion thereof, and a transmission case (5) ( 6), left and right final cases (7) and (8) connected to the transmission cases (5) and (6), and axles via the axles (9a) and (10a) to the final cases (7) and (8). A drive frame (11) for supporting the drive wheels (9) and (10) to be supported, an engine (3), a transmission case (4), and a working unit drive case (4a) integrally with a rear portion, and one drive wheel (9). And a control handle (13) extending rearward and upward from the frame (11).
[0007]
The right final case (8) and the right drive wheel (10) are larger than the left final case (7) and the drive wheel (9) on the right side of the fuselage, as shown in FIGS. By eccentric arrangement, both drive wheels (9) and (10) are formed so as to be able to move between the valleys on both sides of the ridge (14). In addition, a transmission case (6) supporting one final case (8) and a driving wheel (10) and a transmission mechanism built therein, and left and right final cases (7) and (8) at both ends are provided with arms (70) ( The right final case (8) and the right driving wheel (10) are configured to be extensible with respect to the rear horizontal connecting pipe (72) connected to the body frame (11) via the base frame 71). To change the distance (tread) between the left and right wheels (9) and (10), adjust the position of the driving wheel (10) according to the difference in the width of the ridge (14), and run across the ridge (14). It is configured as follows.
[0008]
Further, the working unit (2) is configured by assembling various components on the body frame (11), and the working unit (2) is a pull-out conveying member (16) that is inclined to the front, the rear, and the rear. And a lower transport device (17) provided below the pull-out transport member (16) and provided at a smaller inclination angle than the pull-out transport member (16), and a row in a row (14). A digging device (20) for digging a group of root vegetable crops (19) such as onions to be planted, and a cutting device arranged below the pulling and conveying member (16) in the middle of the transfer of the lower conveying device (17). A working unit (2) for harvesting root crops (19).
[0009]
The pulling-out conveying member (16) stretches and stretches soft elastic endless belts (23) (23) juxtaposed on the left and right, respectively, and clamps and transfers formed between the two endless conveying belts (23) (23). The root vegetable crop (19) is configured to be transported by sandwiching a portion near the tip of the foliage (19a) of the root vegetable crop (19). Further, as shown in FIG. 2, a foliage releasing device (24) bent leftward and laterally in a plan view is provided at a transfer end portion of the left pull-out and conveying member (16), and a root crop (19) is provided. Is released to the upper surface of the ridge (14), while the cut foliage (19a) is released to the valley on the left side of the ridge (14).
[0010]
A pair of left and right scraping members (26) (26) having endless bands (25) (25) with elastic transport projections (25a) are provided on the transport start end side of the pull-out transport member (16). At the same time, at the front part in the traveling direction of the raking members (26) and (26), the foliage (19a) of a plurality of rows of root crops (19) to be planted on the ridge (14) is divided into right and left. A vertically-rotating weed raising member (27) is provided, and the tip of the lower part of each weed raising member (27) rushes into the underground portion between the root crops (19) in each row. A vertical root cutting rod (52) for vertically cutting and dividing the root vegetable crop (19) is provided, and further, at a portion below the transport start end of the pull-out transport member (16), Excavation is appropriately made under the underground portion of the root crop (19) introduced between the vertical rotation type weed raising members (27). Progressive Drilling-up device (20) is provided with its photo device (20) is provided with a pair of right and left vibration blade front view L-shape (28) (28).
[0011]
On the other hand, as shown in FIG. 8, the lower transfer device (17) holds the neck portion (19b) of the root crop (19) by a holding transfer path formed by a pair of left and right soft elastic transfer endless bands (29). The lower end of the lower conveying device (17) is suspended above the intermediate transfer portion of the discharge conveyor (30), and is suspended below the lower conveying device (17). The crop (19) is received on the upper surface of the discharge conveyor (30), and the neck (19b) of the crop (19) is moved to the left side by the lower transporting device (17) and the horizontal foil (31) and the horizontal guide (32) at the transfer end. The crop (19) in the recessed direction (30a) formed on one side of the discharge conveyor (30), with the sphere portion of the crop (19) inserted into the recess (30a). On the top of the ridge (14) Is configured so as to please.
[0012]
A neck (19b) is clamped by the lower transport device (17) at a position above the lower transport device (17) and below the pull-out transport member (16), and the foliage ( A cutting device (21) driven by an electric motor (21a) for separating the foliage (19a) of the root crop (19) holding the root crop (19a) is provided. The cutting device (21) May be a structure for driving a rotary blade as shown in the figure, or may be a driven cutting blade such as a reciprocating blade.
[0013]
Among the components of the working unit (2) composed as described above, those driven by power, that is, the pull-out transport member (16) and the lower transport device (17) of the transport device (18) and the transport device ( The raking members (26) and (26), the vertical rotation type weeding raising member (27), the digging device (20), etc., which are provided in the front part of (18) in cooperation with each other, have a transmission as shown in FIG. A work output shaft (34) extending forward from a transmission case (4) via a clutch (33) through a transmission tube (35) in the front-rear direction. (4a) and is interlockingly connected to a drive shaft (36) inserted in the working unit drive case (4a).
[0014]
An upper transfer drive shaft (39) interlockingly connected to the drive shaft (36) via a worm (37) and a worm wheel (38) is projected upward, and pulled out and transferred by the upper transfer drive shaft (39). The pair of left and right soft elastic transport endless belts (23) and (23) of the member (16) are respectively driven to rotate in predetermined directions, and the scraping members (26) and (26) are connected to the soft elastic transport endless belt (23). The front shafts (40) and (40) each having a ring around which (23) is wound are driven to rotate in common, and the lower transporting devices (29) and (29) are also mounted on the front shafts (40) and (40). It is configured to be rotationally driven by the transmission shafts (41) (41) that are linked and connected.
[0015]
Further, cranks (42) and (42) are provided at the left and right ends of the drive shaft (36), and the front ends of the pitmen (43) and (43) having the rear ends connected to the excavator (20). The vibrating blades (28) and (28) are connected to the vibrating blades (28) and (28) to reciprocate the vibrating blades (28) and (28) in the front-rear direction. 11), and the upper part and the lower part thereof swing back and forth around the fulcrum shaft (45) contrary to each other.
[0016]
Further, a discharge conveyor (30) is connected to the drive shaft (36) via a bevel gear (46) and the like, and a foliage discharge device (24) is connected to the left transfer endless belt (23).
[0017]
Further, the rear end of the elevating input shaft (47) extending substantially horizontally in the front-rear direction is connected to the right end of the drive shaft (36) via a bevel gear (48). The right end of the drive shaft (49) for driving the members (27) is connected to the front end of the input shaft (47) via a bevel gear (50).
[0018]
As is clear from FIG. 9, the right pipe of the right transmission case (6) and the hollow pipe-shaped slide receiving portions (80) and (81) from the right end of the rear horizontal connecting pipe (72) are coaxial. , The hollow pipe-shaped slide portions (82) and (83) are fitted to the slide receiving portions (80) and (81) so as to be able to freely enter and exit, and the respective slide portions (82) and (83) The right final case (8) is connected to the right end of the right transmission case, and the right transmission case (6) and the rear horizontal connection pipe are connected by moving the slide portions (82) and (83) into and out of the slide receiving portions (80) and (81). By setting (72) to the fixed side, the right final case (8) and the drive wheel (10) can move in the axle direction, that is, the tread can be adjusted.
[0019]
As shown in FIG. 10, the above-described tread adjustment is performed using the driving force of the right driving wheel (10), and the left end of the driving shaft (84) inserted into the left and right transmission cases (5) and (6). And a left axle (9a) interlockingly connected via a chain transmission mechanism (85) built in the left final case (7) to transmit power to the left drive wheel (9) from the transmission case (4). On the other hand, a hollow telescopic transmission shaft (86) having a double structure capable of transmitting rotation while allowing sliding in the axial direction to the slide receiving portion (80) and the slide portion (82) is inserted, and the telescopic transmission shaft ( 86), the left end of the inner shaft (86a) is operatively connected to the right end of the drive shaft (84), and a chain built in the right final case (8) at the right end of the outer shaft (86b) of the telescopic transmission shaft (86). The right wheel (10) is linked and connected via the transmission mechanism (87). A structure for transmitting power to the drive wheel (10) on the right side of the transmission case (4) is provided. A screw mechanism (88) is provided in the hollow of the telescopic transmission shaft (86) for converting rotation of the shaft (86) into linear motion. The screw mechanism (88) includes a female screw (89) formed on the inner surface of the right end of the inner shaft (86a), and a male screw (90) inserted into the outer shaft (86b) and screwed to the female screw (89). ) Is formed on the outer surface, and a male screw shaft (91) is formed on the outer surface, and the brake mechanism (92) is formed by passing the male screw shaft (90) through the outer shaft (86b) and outside the right final case (8). By turning on the brake mechanism (92) and locking it to the final case (8) on the right side of the male screw shaft (91), the screw mechanism (88) is operated and the telescopic transmission shaft (86) is turned on. ) Is converted to linear motion Giving the final casing (8) of, and configured to perform a tread regulation.
[0020]
It is to be noted that, by switching the rotation direction of the transmission shaft (84), the tread can be switched between enlargement and contraction, and a screw mechanism (88), that is, a tread extension device can be formed in the telescopic transmission shaft (86). When an overload occurs, the load is released due to slipping at the brake mechanism (92), thereby preventing damage to the power transmission mechanism, reducing the size of each component, and further adjusting the brake to adjust the right final case (8). Since the push-pull force and speed can be adjusted, fine adjustment of the tread is also possible, resulting in excellent operability.
[0021]
【The invention's effect】
As is clear from the above embodiment, the present invention converts the rotational motion of the transmission shaft (86) for transmitting power to the drive wheels (9) and (10) into linear motion and converts the rotation to the transmission shaft (1). 86), a transmission case (6) into which the transmission shaft (86) is inserted, and a screw mechanism (88) for extending and contracting the slide portions (82) and (83) with respect to the rear horizontal connecting pipe (72). The transmission shaft (86) is a hollow telescopic transmission shaft having a double structure that allows rotation in the axial direction and transmits rotation, and has an inner shaft (86a) connected to the drive shaft (84) and a drive wheel (10). The screw mechanism (88) is provided in the hollow of the transmission shaft (86), and has a female screw (89) formed on the inner shaft (86a) and an outer shaft (86b) connected to the outer shaft (86b). A male screw (90) to be inserted and screwed to the female screw (89) is formed on the outer surface. And a screw shaft (91). The male screw shaft (91) is locked by a brake mechanism (92) to activate a screw mechanism (88), and by changing the rotation direction of the transmission shaft (86), the tread is enlarged. Switching of reduction can be performed, and tread adjustment (enlargement and reduction) can be performed using the driving force of the driving wheel (10) without using a driving member such as a special cylinder or the like, thereby increasing cost. Can be suppressed, and compactness can be easily achieved.
[0022]
Further, as set forth in claim 2, the brake mechanism (92) is constituted by a final case (8) connected to the transmission case (6) into which the transmission shaft (86) is inserted, and connected to the brake drum (93). And a brake mechanism (92) for transmitting the rotational movement of the transmission shaft (86) with respect to the screw mechanism (88) so as to be able to freely cut off the screw shaft (91). ), The overload can be absorbed by the brake mechanism (92), and it is easy to replace against abrasion and the like, and is excellent in maintainability.
[0023]
Further, as shown in claim 3, right and left transmission cases (5) and (6) extending left and right from the transmission case (4), and left and right final cases (5 and 6) connected to the respective transmission cases (5) and (6). 7) (8) and a tread adjusting device for a mobile agricultural machine having left and right driving wheels (9) and (10) supported on respective final cases (7) and (8) via axles (9a) and (10a). A hollow pipe-shaped slide receiving portion (80) is integrally extended from one end side of the transmission case (6) to one side of the fuselage on the same axis, and a hollow pipe-shaped slide portion (80) is attached to the slide receiving portion (80). 82) is fitted so that it can freely enter and exit, a final case (8) is connected to one end of the slide portion (82), and the slide receiving portion (80) and the slide portion (82) are allowed to slide in the axial direction. The hollow telescopic transmission shaft (86 And one end of an inner shaft (86a) of the telescopic transmission shaft (86) is connected to one end of a drive shaft (84) inserted into the transmission case (6), and the outer shaft (86) of the telescopic transmission shaft (86) is connected. The drive wheel (10) is connected to one end of 86b) via a transmission mechanism (87) built in the final case (8), and is inserted into at least one transmission case (6) and the transmission case (6). The telescopic transmission shaft (86) has a telescopic structure, and has a screw mechanism (88) in the hollow of the telescopic transmission shaft (86) for converting rotation of the shaft (86) into linear motion. Reference numeral 88) denotes a male screw (89) formed on the inner surface of one end of the inner shaft (86a) and a male screw (90) inserted into the outer shaft (86b) and screwed to the female screw (89). And a screw shaft (91). b) is penetrated and connected to the brake drum (93) of the brake mechanism (92) constituting the final case (8), and the male screw shaft (91) is locked to the final case (8) by the brake mechanism (92). Thus, the rotational motion of the telescopic transmission shaft (86) is converted into a linear motion and applied to the final case (8), and at least one of the transmission case (6) and the telescopic transmission shaft (6) inserted into the transmission case (6). 86), the tread can be adjusted (enlarged and reduced) by using the driving force of the driving wheel (10) without using a driving member such as a special cylinder. It can be held down and can be easily made compact.
[Brief description of the drawings]
FIG. 1 is an overall left side view.
FIG. 2 is a plan view of the same.
FIG. 3 is a front view of the same.
FIG. 4 is a drive system diagram.
FIG. 5 is a work state explanatory view.
FIG. 6 is an explanatory view of a working state.
FIG. 7 is a work state explanatory view.
FIG. 8 is a plan view of a lower transport unit.
FIG. 9 is a plan view of a driving wheel unit.
FIG. 10 is an explanatory view of tread adjustment.
FIG. 11 is an overall schematic front view.
FIG. 12 is a rear view of the same.
FIG. 13 is a left side view of the same.
FIG. 14 is a right side view of the same.
FIG. 15 is a plan view of the same.
FIG. 16 is a bottom view of the same.
[Explanation of symbols]
(4) Transmission case (5) (6) Transmission case (7) (8) Final case (9) (10) Drive wheel (9a) (10a) Axle (72) Rear horizontal connecting pipe (80) Slide receiving part ( 82) (83) Slide part (84) Drive shaft (86) Transmission shaft (86a) Inner shaft (86b) Outer shaft (87) Transmission mechanism (88) Screw mechanism (89) Female thread (90) Male thread (91) Male screw shaft (92) Brake mechanism (93) Brake drum

Claims

A drive shaft (86) for transmitting power to the drive wheels (9) (10), a rotary motion of the drive shaft (86) being converted into a linear motion, and a drive shaft (86) and a drive case (6) in which the drive shaft (86) is inserted; Rutotomoni comprising a screw mechanism (88) for expanding and contracting slide portion (82) (83) against the rear transverse connecting pipe (72), said transmission shaft (86), the rotation by allowing the sliding in the axial direction The transmission mechanism is a hollow telescopic transmission shaft having a double structure, and comprises an inner shaft (86a) connected to the drive shaft (84) and an outer shaft (86b) connected to the drive wheel (10). A female screw (89) formed in the inner shaft (86a) and a male screw (90) inserted in the outer shaft (86b) and screwed to the female screw (89) in the hollow of the transmission shaft (86). And a male screw shaft (91) formed on the outer surface. Exert a screw mechanism (88) by locking the structure (92), transmission shaft (86) tread adjusting apparatus for a mobile agricultural machine is characterized in that for switching expansion and scaled down the tread by the rotation direction of the switching of.

The brake mechanism (92) is configured as a final case (8) connected to the transmission case (6) in which the transmission shaft (86) is inserted. The tread adjusting device for a mobile agricultural machine according to claim 1, wherein the tread adjusting device is locked to the case (8).

Left and right transmission cases (5) and (6) extending left and right from the transmission case (4), left and right final cases (7) and (8) connected to each transmission case (5) and (6), and each final One end side of a transmission case (6) in a tread adjusting device for a mobile agricultural machine including left and right drive wheels (9) and (10) supported on axles (9a) and (10a) via cases (7) and (8). And a hollow pipe-shaped slide receiving portion (80) is integrally extended on one side of the fuselage on the same axis, and a hollow pipe-shaped slide portion (82) is fitted to the slide receiving portion (80) so as to be able to enter and exit freely. The final case (8) is connected to one end of the slide portion (82), and the slide receiving portion (80) and the slide portion (82) are allowed to slide in the axial direction and have a double structure for transmitting rotation. The telescopic transmission shaft (86) is inserted and the telescopic transmission shaft (8) is inserted. ) Is connected to one end of a drive shaft (84) inserted into the transmission case (6) to one end of an inner shaft (86a), and is connected to one end of an outer shaft (86b) of the telescopic transmission shaft (86). ), The drive wheels (10) are connected via a transmission mechanism (87) built in, and at least one transmission case (6) and a telescopic transmission shaft (86) inserted in the transmission case (6) can be extended and contracted. And a screw mechanism (88) for converting the rotation of the shaft (86) into a linear motion is provided in the hollow of the telescopic transmission shaft (86), and the screw mechanism (88) is provided with an inner shaft (86a). A female screw (89) formed on the inner surface at one end, and a male screw shaft (91) formed on the outer surface with a male screw (90) inserted into the outer shaft (86b) and screwed to the female screw (89), This male screw shaft (91) passes through the outer shaft (86b) to Case is connected to the brake drum (93) of the brake mechanism constituting (92) in (8), by locking the male screw shaft (91) to the final case (8) by the brake mechanism (92), telescopic transmission shaft ( the rotational movement of 86) converted into a linear motion imparted to the final case (8), the expanding and contracting telescopic transmission shaft which is inserted into the at least one of the transmission case (6) and its transmission case (6) (86) A tread adjustment device for mobile agricultural machines.