JP2004166561A

JP2004166561A - Partial normal or reverse rotation rotary apparatus

Info

Publication number: JP2004166561A
Application number: JP2002334807A
Authority: JP
Inventors: Yohei Kanao; 洋平金尾; Eiji Yamazaki; 栄二山崎
Original assignee: Seirei Industry Co Ltd
Current assignee: Yanmar Agribusiness Co Ltd
Priority date: 2002-11-19
Filing date: 2002-11-19
Publication date: 2004-06-17
Anticipated expiration: 2022-11-19
Also published as: JP3990973B2

Abstract

<P>PROBLEM TO BE SOLVED: To readily change the operation blades of both internal and external rotary shafts into a position to wholly reverse the operation blades by simple structure in a partial normal or reverse rotation rotary apparatus with which the operation blades attached to the internal and external double rotary shafts are opposingly rotated. <P>SOLUTION: In the partial normal or reverse rotation rotary apparatus with which the operation blades attached to the internal and external double rotary shafts supported on a drive case are opposingly rotated, the operation blade fixed to the outer rotary shaft is adjacently arranged in the drive case and reversed and the operation blade fixed to the inner rotary shaft is arranged in a shaft cylinder attachable and detachable from the inner rotary shaft and normally rotated. The shaft cylinder is removed from the inner rotary shaft and the outer projection of the inner rotary shaft is covered with a covering member and the covering member is formed into an extended shaft cylinder equipped with the operation blades, connected and fixed to the outer rotary shaft side to carry out ground operation. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、部分正逆転ロ−タリ装置に関する。
【０００２】
【従来の技術】
ドライブケ−スに同芯状に支持した内外二重の内ロ−タリ軸と外ロ−タリ軸とを正転伝動系と逆転伝動系によって背反方向に回転させて、内ロ−タリ軸に装着した爪軸筒に設けられている耕耘爪と外ロ−タリ軸に装着した爪軸筒に設けられている耕耘爪とを同時に正逆転させて耕耘作業を行う部分正逆転ロ−タリ耕耘装置が知られている（例えば、特許文献１参照）。
そして、従来の部分正逆転ロ−タリ耕耘装置の中には、内ロ−タリ軸に装着した爪軸筒への伝動を断って、外ロ−タリ軸を駆動する逆転伝動系側に結合する回転方向切換手段を設けて、同手段の切換所作により、外ロ−タリ軸に装着した爪軸筒に設けられている耕耘爪と内ロ−タリ軸に装着した爪軸筒に設けられている耕耘爪の全てを逆転させて耕耘作業を行えるようにしたものがある（例えば、特許文献２参照）。
【０００３】
【特許文献１】
特開平８−１９１６０１号公報
【特許文献２】
特開平１０−１４６１０１号公報
【０００４】
【発明が解決しようとする課題】
前記特許文献２にみられるものは、内ロ−タリ軸に装着した爪軸筒の耕耘爪と外ロ−タリ軸に装着した爪軸筒の耕耘爪とを同時に正逆転させて耕耘作業する態勢と、内ロ−タリ軸に装着した爪軸筒及び外ロ−タリ軸に装着した爪軸筒の双方に設けられている全ての耕耘爪を逆転させて耕耘作業する態勢とに変換することができるけれども、そのために内ロ−タリ軸に装着する爪軸筒への伝動を断って外ロ−タリ軸に装着する爪軸筒を駆動する伝動系に結合するクラッチ等の回転方向切換手段を要するから前記伝動系が複雑になり、作業態勢を変換する所作も面倒な難点がある。
【０００５】
本発明は、ロ−タリ耕耘装置等の部分正逆転ロ−タリ装置において、内外両ロ−タリ軸に装着する爪軸筒に動力伝達する伝動系を複雑化させずに簡潔な構成でもって内ロ−タリ軸側の耕耘爪（作業ブレ−ド）と外ロ−タリ軸側の耕耘爪（作業ブレ−ド）とを同時に正逆転させて対地作業する態勢と、逆転する耕耘爪（作業ブレ−ド）のみにより対地作業する態勢とに変換することができ、しかも、逆転する作業ブレ−ドのみによって対地作業する態勢において対地作業幅を広狭に変更設定できるようにして逆転作業ブレ−ドによる対地作業の適応性を高めたものである。
【０００６】
【課題を解決するための手段】
請求項１に係る発明は、ドライブケ−スに支持した内外二重のロ−タリ軸を互いに反対方向に回転させて外ロ−タリ軸に取付けた作業ブレ−ドと内ロ−タリ軸に取付けた作業フレ−ドとを同時に正逆転させて対地作業を行う部分正逆転ロ−タリ装置において、外ロ−タリ軸に取付けた作業ブレ−ドをドライブケ−スに隣接する部位に配設して逆転させると共に、内ロ−タリ軸に取付ける作業ブレ−ドは内ロ−タリ軸に対し着脱自在な軸筒に配設して正転させ得るように構成し、正転する内ロ−タリ軸に対して着脱自在な前記軸筒を取外して外ロ−タリ軸から外方に突出する内ロ−タリ軸の外方突出部分を被包部材で被い、逆転する外ロ−タリ軸側の作業ブレ−ドのみによって対地作業できるようにしている。
【０００７】
請求項２に係る発明は、ドライブケ−スに支持した内外二重のロ−タリ軸を互いに反対方向に回転させて外ロ−タリ軸に取付けた作業ブレ−ドと内ロ−タリ軸に取付けた作業ブレ−ドとを同時に正逆転させて対地作業を行う部分正逆転ロ−タリ装置であって、外ロ−タリ軸に取付けた作業ブレ−ドをドライブケ−スに隣接する部位に配設して逆転させると共に、内ロ−タリ軸に取付ける作業ブレ−ドは内ロ−タリ軸に対し着脱自在な軸筒に配設して正転させ得るように構成し、正転する内ロ−タリ軸に対して着脱自在な前記軸筒を取外して外ロ−タリ軸から外方に突出する内ロ−タリ軸の外方突出部分を被包部材で被い、逆転する外ロ−タリ軸側の作業ブレ−ドのみによって対地作業できるようにしたものにおいて、前記内ロ−タリ軸の外方突出部分を被う被包部材を、外周に逆転用作業ブレ−ドが取付けられた延長軸筒に形成して、該延長軸筒を前記軸筒の外方突出部分に回転自在に外挿して支持させその延長軸筒の内端部を外ロ−タリ軸側にフランジ結合し外ロ−タリ軸と共に逆転させるようにして、外ロ−タリ軸側の作業ブレ−ドによる対地作業幅を拡幅できるようにしている。
【０００８】
請求項３に係る発明は、ドライブケ−スに支持した内外二重のロ−タリ軸を互いに反対方向に回転させて外ロ−タリ軸側に取付けた作業ブレ−ドと内ロ−タリ軸側に取付けた作業ブレ−ドとを同時に正逆転させて対地作業を行う部分正逆転ロ−タリ装置であって、外ロ−タリ軸側に取付けた作業ブレ−ドをドライブケ−スに隣接する部位に配設して逆転させるとともに、内ロ−タリ軸側に取付ける作業ブレ−ドは内ロ−タリ軸に対し着脱自在な軸筒に配設して正転させ得るように構成し、正転する内ロ−タリ軸に対して着脱自在な前記軸筒を取外してその外方突出部分へ、外周に作業ブレ−ドを備えた延長軸筒を回転自在に外挿して支持させ、その延長軸筒を外ロ−タリ軸側にフランジ結合して外ロ−タリ軸と共に逆転させるようにしたものにおいて、外ロ−タリ軸側に設置するフランジ体の接合面側に輪状凸部を形設して、内ロ−タリ軸にそれと共に回転する軸筒を装した場合には、同軸筒に設けた円盤体の内向き屈曲周縁部が前記輪状凸部にラビリンス構造に被冠重合し、延長軸筒を装した場合には、延長軸筒側のフランジ体の接合面に形成されている輪状凹部が前記輪状凸部にインロ−嵌合するようにしている。
【０００９】
【発明の実施の形態】
次に、部分正逆転ロ−タリ装置が、歩行型農作業車に連設されるロ−タリ耕耘装置である場合を示した実施例について図面を参照して説明する。
図１は部分正逆転ロ−タリ装置を装備した歩行型農作業車の全体側面図、図２は同じく全体平面図、図３はロ−タリ耕耘装置を抽出し拡大した平面図、図４はロ−タリ耕耘装置の伝動断面図である。
【００１０】
先ず、歩行型農作業車の全体的な構成から説明すると、図１〜図２にみられるように歩行型農作業車は、左右一対の走行車輪（１０）（１０）を軸支した走行ミッションケ−ス（１１）と、走行ミッションケ−ス（１１）から前延するエンジンフレ−ム（１２）とを基体とし、この基体のエンジンフレ−ム（１２）に搭載するエンジン（１３）と、基体から後方に延設する操縦ハンドル（１４）と、基体の後部に連設するロ−タリ耕耘装置（１５）とを備える。
【００１１】
そして、前記エンジン（１３）の出力軸（１６）と走行ミッションケ−ス（１１）の入力軸（１７）間を主伝動ケ−ス（１８）に内蔵された主伝動機構で動力断続自在に連動連結して、入力軸（１７）に受動した動力を走行ミッションケ−ス（１１）内の変速伝動機構を経て前記走行車輪（１０）（１０）に伝達し、走行車輪（１０）（１０）を回転駆動して走行するようになっている。
また、走行ミッションケ−ス（１１）のＰＴＯ軸から作業出力ケ−ス（１９）内の出力伝動機構を経てロ−タリ耕耘装置（１５）の受動軸（２０）に動力伝達できるようになっている。
【００１２】
走行ミッションケ−ス（１１）は、上方の変速機構収容部と下方の最終伝動機構収容部とを左右幅の狭い中間部で連絡させて形成されている。そして、ケ−ス上方の変速機構収容部に前記入力軸（１７）と変速機構とが収容され、また、これ等に連動する最終伝動機構及び左右車軸（２１）（２１）がケ−ス下方の最終伝動機構収容部に収容支架されて、入力軸（１７）から左右の車軸（２１）（２１）へ各別に伝動する変速伝動装置（図示省略）がケ−ス内に構成されている。
【００１３】
左右の車軸（２１）（２１）は走行ミッションケ−ス（１１）の最終伝動機構収容部から左右横側方に延出されて、各々の車軸の延出部分に走行車輪（１０）（１０）が止着される。そして、走行車輪（１０）（１０）は、左右車軸（２１）（２１）の軸芯Ｂ−Ｂ（図２参照）に沿って取付位置を変更して、任意の轍間距離位置で固定できるようになっている。
【００１４】
なお、走行車輪（１０）（１０）の取付位置を変更するにあたっては、前述のように走行ミッションケ−ス（１１）の中間部が左右幅狭く形成されていることと、図１にみられる如く側面視で走行車輪（１０）（１０）が周辺の他部材に干渉しないようになっていることから、図２にみられる如く、両走行車輪（１０）（１０）を、エンジンを含む基体の横幅よりも狭い轍間距離にして取付けることができ、そのような狭い轍間距離に設定することで、畝間や作物条間をも支障なく走行できるものとなっている。
【００１５】
一方、走行ミッションケ−ス（１２）の上部、即ち、変速機構収容部の後背部分には作業機連結体（２２）が連設されて、この作業機連結体（２２）に前記ロ−タリ耕耘装置（１５）のドライブケ−ス（２３）の上部が直接に取付けられ、これによってロ−タリ耕耘装置（１５）が歩行型農作業車の基体に一体的に連設される。
【００１６】
なお、前記作業機連結体（２２）には変速ガイド板（図示省略）が設けられ、これに開設した案内溝に前記走行ミッションケ−ス（１１）の変速機構収容部から後方斜め上方に延出される走行変速レバ−（２４）が貫挿されて後方に伸延され、その走行変速レバ−（２４）を前記案内溝に沿って作動させて所望の掛止位置に移動させることによって、走行ミッションケ−ス（１１）内の変速伝動装置を変速及び前後進切換えできるようになっている。
【００１７】
また、作業機連結体（２２）の左右側面部には前記操縦ハンドル（１４）基部が取付角度調節自在に取付けられており、その操縦ハンドル（１４）部において、（２５）は主伝動ケ−スの主伝動機構を断続操作する主クラッチレバ−、（２６）は駐車ブレ−キレバ−、（２７）はサイドクラッチレバ−、（２８）は緊急停止デッドマンレバ−である。
【００１８】
歩行型農作業車に作業機連結体（２２）を介して一体的に連設されるロ−タリ耕耘装置（１５）は、前記ドライブケ−ス（２３）と、ドライブケ−ス（２３）に取付けられる作業部カバ−（２９）と、作業部カバ−（２９）の後方位に延設されるホルダ−に上下位置調節自在に取付けた尾輪装置（３０）等によって構成され、前記ドライブケ−ス（２３）の下部には対地作業用のロ−タリ軸がその軸芯Ｃ−Ｃを前記左右車軸（２１）（２１）の軸芯Ｂ−Ｂに平行させて横設されている。
なお、図示されている尾輪装置（３０）は左右一対の双輪（３０ａ）（３０ａ）を備えたものとなっているが、これは歩行型農作業車の車体中心線（Ａ−Ａ）の後方延長線上に位置する単輪（３０ｂ）とする場合もある。
【００１９】
ロ−タリ耕耘装置（１５）のドライブケ−ス（２３）は、図４にみられる如く、上方の切換機構収容部と下方のロ−タリ軸支承部とが、これらの両部よりも著しく左右幅の狭い中間部分によって一体に連絡されるものとなっており、左右のケ−ス半体を合接して形成されている。
【００２０】
そして、ケ−ス上部の切換機構収容部には、ドライブケ−ス（２３）に収容される伝動機構の入力軸である受動軸（２０）が左右横向きに軸受支承され、該受動軸（２０）が歩行型農作業車の右方側に延出されて、該延出部と前記走行ミッションケ−ス（１１）から右方側に延出されているＰＴＯ軸の延出部とが前出の作業出力ケ−ス（１９）内部の出力伝動機構によって連動連結される。
【００２１】
図４の上半部にみられるように、ドライブケ−ス（２３）上部の切換機構収容部には、前記受動軸（２０）が設けられるとともに、該受動軸（２２）に平行する回転軸（３１）が軸受支承されて、受動軸（２２）と回転軸（３１）にわたって正逆転切換伝動機構が組成される。
【００２２】
具体的には、前記受動軸（２０）に、遊転ギヤ（３２）と遊転スプロケット（３３）と両者の間に在って受動軸（２０）にスライド自在にスプライン嵌着される正逆転切換体（３４）とを設ける一方で、前記回転軸（３１）側に、前記遊転ギヤ（３２）に常時噛合する受動ギヤ（３５）と、遊転スプロケット（３３）に対応する受動スプロケット（３６）と、出力スプロケット（３７）とが一体になった伝動体を遊転状態に嵌着し、また、前記遊転スプロケット（３３）と受動スプロケット（３６）とにチエン（３８）を掛回して正逆転切換伝動機構が構成されている。
【００２３】
そして、正逆転切換体（３４）を受動軸（２０）の軸心方向にスライド移動操作して遊転ギヤ（３２）にクラッチ結合させると、受動軸（２０）の動力が正逆転切換体（３４）、遊転ギヤ（３２）を経て前記伝動体に伝動されて、その伝動体の出力スプロケット（３７）が正転する伝動状態になり、また、正逆転切換体（３４）を前述とは逆方向にスライド移動操作して遊転スプロケット（３３）にクラッチ結合させると、受動軸（２０）の動力が正逆転切換体（３４）、遊転スプロケット（３３）、チエン（３８）、受動スプロケット（３６）を経て伝動体に伝動されて伝動体の出力スプロケット（３７）が逆転する伝動状態となり、さらに、正逆転切換体（３４）を遊転ギヤ（３２）、遊転スプロケット（３３）のいずれにもクラッチ結合しない中立位置に保持すると、前記出力スプロケット（３７）からの伝動が停止されるようになっている。
【００２４】
前記正逆転切換伝動機構は、通常、伝動体の出力スプロケット（３７）が正転する伝動状態に切換保持しておき、必要に応じて出力スプロケット（３７）が逆転する伝動状態に切換えるのであり、出力スプロケット（３７）に伝達された正転方向又は逆転方向の回転動力はドライブケ−ス（２３）下部のロ−タリ軸支承部に収容されているロ−タリ軸駆動機構に伝達されるのであるが、該ロ−タリ軸駆動機構は、図４の下半部にみられるように構成されている。
【００２５】
図４は、正逆転切換伝動機構の出力スプロケット（３７）が正転する伝動状態を示しており、この図４においてドライブケ−ス（２３）下部のロ−タリ軸支承部には左右一対の外ロ−タリ軸（３９）（３９）と、それらの外ロ−タリ軸（３９）（３９）を相対回転自在に貫通して左右に延出する内ロ−タリ軸（４０）とが内外二重軸状に軸受支承されると共に、外ロ−タリ軸（３９）（３９）並びに内ロ−タリ軸（４０）より上方に在って両ロ−タリ軸（３９）（３９）、（４０）に平行する中間回転軸（４１）が回転自在に軸受支承されている。
【００２６】
そして、ロ−タリ軸支承部の内部における前記内ロ−タリ軸（４０）の軸心方向中央部にロ−タリ軸スプロケット（４２）がスプライン嵌着され、このロ−タリ軸スプロケット（４２）と前述した正逆転切換伝動機構の出力スプロケット（３７）とにチエン（４３）を巻き掛け、ドライブケ−ス（２３）の中間部に支承して前記チエン（４３）に掛回外側から噛合させるアイドルスプロケット（４４）でチエン張りして内ロ−タリ軸（４０）を前記正逆転切換伝動機構に連動連結し、これによって内ロ−タリ軸（４０）を図１の側面視状態において反時計回り（正転方向）に回転するように成されている。
【００２７】
また、中間回転軸（４１）の軸心方向中央部には、前記チエン（４３）の掛回内側に噛合する逆転入力スプロケット（４５）がスプライン嵌着され、チエン（４３）の回動に連れて中間回転軸（４１）を内ロ−タリ軸（４０）と同じく正転方向に回転させるようになっている。
【００２８】
しかして、中間回転軸（４１）部において、逆転入力スプロケット（４５）の左右両脇部には逆転駆動ギヤ（４６）（４６）が各々スプライン取付けされ、各々の逆転駆動ギヤ（４６）（４６）が、前記左右の外出力軸（３９）（３９）の内端部に設けられている逆転被動ギヤ（４７）（４７）に各々噛合され、左右の外出力軸（３９）（３９）を内ロ−タリ軸（４０）とは反対の時計回り方向（逆転方向）に回転させるようになっている。
【００２９】
なお、左右の外ロ−タリ軸（３９）（３９）には、それぞれの外方軸端部から外嵌して外ロ−タリ軸（３９）（３９）にスプライン結合する第１軸筒（４８）（４８）が設けられ、各々の第１軸筒（４８）（４８）の軸心方向内端寄り部分を、前記ロ−タリ軸支承部に形成されている左右の軸承部に差込んで各々を軸受（４９）（４９）で回転自在に支持させている。
言い換えると、前述した第１軸筒（４８）（４８）の支持によってロ−タリ軸支承部への外ロ−タリ軸（３９）（３９）の支持が行われ、また、外ロ−タリ軸（３９）（３９）に貫通された内ロ−タリ軸（４０）のロ−タリ軸支承部への支持もが果されるようになっている。
【００３０】
ドライブケ−ス（２３）のロ−タリ軸支承部から左右に突出する外ロ−タリ軸（３９）（３９）と共に回転する第１軸筒（４８）（４８）には、必要数のブレ−ド取付座（５０）（５０）が設けられて、各々のブレ−ド取付座（５０）に、図１の側面視状態において時計回り方向（逆転方向）に回転する作業ブレ−ド（耕耘爪５１）が挿し込まれてボルト（５２）で止着される。
【００３１】
また、第１軸筒（４８）（４８）の軸芯方向外端部には円板状のフランジ体（５３）がそれぞれ固着されるが、このフランジ体（５３）は前記ブレ−ド取付座（５０）の外側面に接合して設けられる。
そして、前記ボルト（５２）と重合する部分は凹欠または開孔（５３ａ）されていて、前記ボルト（５２）の締め弛め所作をフランジ体（５３）の外側から行えるようにしてあり、又、フランジ体（５３）の外側面（接合面側）には外向きに突出する輪状凸部（５３ｂ）が形設され、その輪状凸部（５３ｂ）の外径は、前記第１軸筒（４８）の外径よりもやや径大とされている。
【００３２】
他方、左右の外出力軸（３９）（３９）および第１軸筒（４８）（４８）の外端より横外方に突出した内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）には各々の外端側から外挿する第２軸筒（５４）（５４）を装して前記延出部（４０ａ）（４０ａ）に刻設されている雄スプラインにスプライン結合させ、第２軸筒（５４）（５４）の外端側から内挿して内ロ−タリ軸（４０）に穿設されている雌ネジに螺合する固定ボルト（５５）（５５）で抜け止め固定される。
【００３３】
また、各々の第２軸筒（５４）（５４）の内端部には、周縁が内向きに屈曲した円盤体（５６）が固設されて、第２軸筒（５４）（５４）が前述の所定状態に装されたときに円盤体（５６）の屈曲周縁部が輪状凸部（５３ｂ）の外径に被冠し、屈曲周縁部と輪状凸部（５３ｂ）とがラビリンス構造に重合して、第１軸筒（４８）と第２軸筒（５４）とが相隣接する部分への草藁等の巻付きを防止するとともに、内ロ−タリ軸（４０）と外ロ−タリ軸（３９）との嵌合部ならびに外ロ−タリ軸（３９）と第１軸筒（４８）との嵌合部への草藁等の侵入を防止するようになっている。
【００３４】
そして、左右それぞれの第２軸筒（５７）（５７）の外周にも所用数のブレ−ド取付座（５８）（５８）が設けられて、各々のブレ−ド取付座（５８）（５８）に、図１の側面視状態において反時計回り方向（正転方向）に回転する作業ブレ−ド（耕耘爪５９）が取付けられてボルト止めされている。
【００３５】
図４の実施例においては、左右の第２軸筒（５７）（５７）に取付けられている作業ブレ−ド（５９）群の左右各々の作業域（Ｌ１）（Ｌ２）のほうがドライブケ−ス（２３）の両脇部に位置する左右の第１軸筒（４８）（４８）に取付けられている作業ブレ−ド（５１）群の総和作業域（Ｌ３）よりも広くなるように設定されており、この設定状態において、左側の第１軸筒（４８）の作業ブレ−ド（５１）群による作業域と左側の第２軸筒（５７）の作業ブレ−ド（５９）群による作業域との境界、及び右側の第１軸筒（４８）の作業ブレ−ド（５１）群による作業域と右側の第２軸筒（５７）の作業ブレ−ド（５９）群による作業域との境界が、それぞれ轍間距離を最小幅にした時の左右走行車輪（１０）（１０）の轍内又はその近傍に位置するようになっている（図２参照）。
【００３６】
また、作業部カバ−（２９）の後方に位置する尾輪装置（３０）が双輪（３０ａ）（３０ａ）を備える場合は、左右の双輪（３０ａ）（３０ａ）はそれぞれ前述した左右の作業域（Ｌ１）（Ｌ２）の後方を追従し、また、尾輪装置（３０）が単輪（３０ｂ）の場合には、その単輪（３０ｂ）は前述した総和作業域（Ｌ３）の中央後方部分を追従するようになっている。
なお、左右の第２軸筒（５７）の作業ブレ−ド（５９）群による左右それぞれの作業幅（作業域Ｌ１、Ｌ２）は、軸長を異ならせて構成した第２軸筒（５７）を選択的に内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）に装することで任意幅に変更設定することができる。
【００３７】
外ロ−タリ軸（３９）（３９）と共に回転する第１軸筒（４８）（４８）に装着されて時計回り方向（逆転方向）に回転する作業ブレ−ド（５１）群と、前記内ロ−タリ軸（４０）によって回転駆動される第２軸筒（５７）（５７）に装着されて反時計回り方向（正転方向）に回転する作業ブレ−ド（５９）群双方の回転圏の上方及び左右両側方は前出の作業部カバ−（２９）によって覆われる。
また、尾輪装置（３０）を支持するホルダ−は、作業部カバ−（２９）とは別個に前記ドライブケ−ス（２３）に取付けられて後方に延出される。
【００３８】
作業部カバ−（２９）は、前記作業ブレ−ド（５１）（５９）の回転圏から適宜上方に離間した部位において前記ドライブケ−ス（２３）に固装するカバ−基体（６０）と、カバ−基体（６０）の左右の縁辺部にそれぞれヒンジ（６１）（６１）を介して上下回動可能に装着する左右の天板部（６２）（６２）と、左右の天板部（６２）（６２）の遊端側にそれぞれ連設する左右の側板部（６３）（６３）とから成る。
【００３９】
また、前記カバ−基体（６０）の前端部には、前方に向いて張り出す前方延長カバ−体（６４）が着脱自在又は一体的に設けられ、該カバ−体（６４）が、外ロ−タリ軸（３９）（３９）と共に回転する第１軸筒（４８）（４８）に装着されて時計回り方向（逆転方向）に回転する作業ブレ−ド（５１）によって前方向きに跳ね上げられる耕土等の前方飛散を効果的に阻止するようにされている。
【００４０】
そして、上述した左右の天板部（６２）（６２）は、それらの上外面側において両者に跨って組成されている開度調節固定機構（６５）によって通常はカバ−基体（６０）と略一直線状となる水平状に保たれ、必要に応じて開度調節固定機構（６５）を操作することにより、前記ヒンジ（６１）（６１）の回動軸芯（６１ａ）（６１ａ）を支点に上方に回動させて任意角度に開き保持できるようになっている。
【００４１】
なお、前記左右のヒンジ（６１）（６１）の回動軸芯（６１ａ）（６１ａ）は、図４にみられるように、左側の第１軸筒（４８）の作業ブレ−ド（５１）群による作業域と左側の第２軸筒（５７）の作業ブレ−ド（５９）群による作業域との境界を通って上方に伸延する仮想延長線付近と、右側の第１軸筒（４８）の作業ブレ−ド（５１）群による作業域と右側の第２軸筒（５７）の作業ブレ−ド（５９）群による作業域との境界を通って上方に伸延する仮想延長線付近に位置している。
【００４２】
このように構成されたロ−タリ耕耘装置が図４の伝動状態にある時には、先にも記述したように、外ロ−タリ軸（３９）（３９）側の作業ブレ−ド（５１）が時計回り方向（逆転方向）に回転し、内ロ−タリ軸（４０）側の作業ブレ−ド（５９）群が反時計回り方向（正転方向）に回転して、互いに反対方向に回転する両作業ブレ−ド（５１）（５９）群によって所定幅（Ｌ１＋Ｌ２＋Ｌ３）の耕耘作業が行われるのであるが、対地作業が土入れ作業である場合には、図５〜６に示しているように態勢変更して対地作業を行うのである。
【００４３】
すなわち、土入れ作業の場合には、図４において内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）に嵌装されている第２軸筒（５４）（５４）を抜き外し、左右延出部（４０ａ）（４０ａ）に図５のように延長軸筒（６６Ａ）（６６Ａ）を自由回転状態に外挿し支持させ、各々の延長軸筒（６６Ａ）（６６Ａ）を外ロ−タリ軸（３９）（３９）側の第１軸筒（４８）（４８）に結合して第１軸筒（４８）（４８）と共に時計回り方向（逆転方向）に回転させるようにして、延長軸筒（６６Ａ）（６６Ａ）に装着する作業ブレ−ド（６７）（６７）も前記第１軸筒（４８）に装着されている作業ブレ−ド（５１）群と共に逆転する態勢にし、作業部カバ−（２９）の左右天板部（６２）（６２）を図５に仮想線で示しているように適宜角度に開き保持して対地作業を行う。
【００４４】
なお、前記延長軸筒（６６Ａ）（６６Ａ）は、第２軸筒（５４）（５４）を抜き外した内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）を被包する被包体を兼ねており、各々の延長軸筒（６６Ａ）の内端部に固設したフランジ体（６８）を前述した第１軸筒（４８）側のフランジ体（５３）に合接し、両フランジ体（６８）（５３）を複数本のボルト（６９）で締結固定して取付けられ、各々の延長軸筒（６６Ａ）の外端側はそれと一体的な蓋（７０）によって閉塞されている。
【００４５】
また、延長軸筒（６６Ａ）の内端部に固設されるフランジ体（６８）の内面側（フランジ体５３に接合する側）には、前記フランジ体（５３）に形設されている輪状凸部（５３ｂ）に対応する輪状凹部が形成されていて、両フランジ体（６８）（５３）が合接されると輪状凹部が輪状凸部（５３ｂ）にインロ−嵌合する。
【００４６】
また、延長軸筒（６６Ａ）に装着する作業ブレ−ド（６８）は、延長軸筒（６６Ａ）外周に固設されているブレ−ド取付座（７１）に挿し込んでボルト（７２）で締付固定して取付けられるのであるが、延長軸筒（６６Ａ）の最内端に位置するブレ−ド取付座（７１ａ）は延長軸筒（６６Ａ）内端のフランジ体（６８）外面に接合して設けられてフランジ体（６８）に重合するので、該ブレ−ド取付座（７１ａ）に挿し込まれた作業ブレ−ド（６８）を締付けるボルト（７２ａ）は、接合した前記両フランジ体（６８）（５３）をも共締めするものにしてある。
【００４７】
図５のように態勢変更して作業する場合、延長軸筒（６６Ａ）（６６Ａ）は内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）に外挿して支持されると共に、インロ−嵌合構造の両フランジ体（６８）（５３）によって第１軸筒（４８）側に結合されるので支持が堅牢なものとなる。
そして、この場合に図５に仮想線で示しているように走行車輪（１０）（１０）の轍間距離を最狭に変更しておけば、歩行型農作業車は畝（Ｕ）（Ｕ）の間を支障なく走行でき、ロ−タリ耕耘装置（１５）は畝間に対応位置するのであり、この際、第１軸筒（４８）に装着されている作業ブレ−ド（５１）群と延長軸筒（６６Ａ）（６６Ａ）に装着した作業ブレ−ド（６７）（６７）の全てが逆転方向（走行車輪１０の回転方向とは逆の方向）にアップカット回転して耕土を前方上向きに跳ね上げ、その耕土が適宜に開き角度に保持されている作業部カバ−（２９）の左右天板部（６２）（６２）に沿って移行されて両側の畝（Ｕ）（Ｕ）の上方に効果的に放擲されるのである。
【００４８】
図７はもう一つの態勢変更例を示しており、この例では、第２軸筒（５４）（５４）を抜き外した内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）を被包体（６６）（６６）で被って、逆転する外ロ−タリ軸（３９）（３９）側の第１軸筒（４８）（４８）に装着されている作業ブレ−ド（５１）（５１）群のみによって対地作業できるようにしているのであり、この場合には、逆転する作業ブレ−ド（５１）群による対地作業幅が最小幅となって、幅狭部分の土入れ作業が行えるほか、図７に仮想線で示しているように作溝作業をすることもできることとなる。
【００４９】
なお、図７においては、被包体（６６）を前述した延長軸筒（６６Ａ）（６６Ａ）のと同じように内ロ−タリ軸（４０）の左右延出部（４０ａ）（４０ａ）に自由回転状態に外挿し支持させ、それをフランジ結合で第１軸筒（４８）側に止着するようにしているが、この被包体（６６）は、例えば内ロ−タリ軸（４０）側に止着する構造にするなど他の如何なる支持止着構造で設けられてもよいものである。
【００５０】
また、図示の実施例のものは、ドライブケ−ス（２３）上部の切換機構収容部に正逆転切換伝動機構を備えているので、この正逆転切換伝動機構の正逆転切換体（３４）を遊転スプロケット（３３）にクラッチ結合させて出力スプロケット（３７）が反対回転するように切り換えることによって、図４の態勢において外ロ−タリ軸（３９）（３９）側の第１軸筒（４８）（４８）に装着されている作業ブレ−ド（５１）群を正転させ、内ロ−タリ軸（４０）側の第２軸筒（５７）（５７）に装着されている作業ブレ−ド（５９）群を逆転させて作業することができ、また、図５〜６および図７の態勢において全ての作業ブレ−ドを正転させて作業することもできるのである。
【００５１】
【発明の効果】
本発明に係る部分正逆転ロ−タリ装置は、以上に説明したように構成しているので、内外両ロ−タリ軸に装着する爪軸筒に動力伝達する伝動系を複雑化させずに簡潔な構成でもって内ロ−タリ軸側の作業ブレ−ドと外ロ−タリ軸側の作業ブレ−ドとを同時に正逆転させて対地作業する態勢と、逆転する作業ブレ−ドのみにより対地作業する態勢とに容易に変換することができ、また、逆転する作業ブレ−ドによって対地作業する場合に対地作業幅を広狭に変更設定できて対地作業の適応性が高まることとなった。
【図面の簡単な説明】
【図１】部分正逆転ロ−タリ装置を装備した歩行型農作業車の全体側面図である。
【図２】同じく全体平面図である。
【図３】ロ−タリ耕耘装置を抽出し拡大した平面図である。
【図４】ロ−タリ耕耘装置の伝動断面図である。
【図５】ロ−タリ耕耘装置の作業態勢変更例を示す部分図である。
【図６】図５を左方からみた側面部分図である。
【図７】ロ−タリ耕耘装置の他の作業態勢変更例を示す部分図である。
【符号の説明】
２３ドライブケ−ス
３９外ロ−タリ軸
４０内ロ−タリ軸
４０ａ外方突出部分
５１作業ブレ−ド
５３フランジ体
５３ｂ輪状凸部
５４軸筒
５６円盤体
５９作業ブレ−ド
６６被包体
６８フランジ体
６６Ａ延長軸筒[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a partially forward / reverse rotary device.
[0002]
[Prior art]
The inner and outer double inner and outer rotary shafts supported concentrically on the drive case are rotated in opposite directions by a forward rotation transmission system and a reverse rotation transmission system. Partial forward / reverse rotary tilling device that performs tilling work by simultaneously and reversely rotating the tilling claw provided on the mounted claw shaft cylinder and the cultivating claw provided on the claw shaft cylinder mounted on the outer rotary shaft Is known (for example, see Patent Document 1).
In the conventional partial forward / reverse rotary tilling apparatus, the transmission to the claw shaft cylinder mounted on the inner rotary shaft is cut off and connected to the reverse rotation transmission system driving the outer rotary shaft. Rotation direction switching means is provided, and by the switching action of the means, the rotation direction switching means is provided on the tillage claw provided on the claw shaft cylinder mounted on the outer rotary shaft and on the claw shaft cylinder mounted on the inner rotary shaft. There is one in which all of the tilling claws are reversed so that tilling work can be performed (for example, see Patent Document 2).
[0003]
[Patent Document 1]
JP-A-8-191601
[Patent Document 2]
JP-A-10-146101
[0004]
[Problems to be solved by the invention]
Japanese Unexamined Patent Application Publication No. 2004-115,086 discloses an arrangement in which a cultivating work is performed by simultaneously rotating a cultivating claw of a claw shaft cylinder mounted on an inner rotary shaft and a cultivating claw of a claw shaft cylinder mounted on an outer rotary shaft in normal and reverse directions. And, it is possible to convert all the tilling claws provided on both the claw shaft cylinder mounted on the inner rotary shaft and the claw shaft cylinder mounted on the outer rotary shaft into a state of performing the tilling work by reversing. If possible, however, rotation direction switching means, such as a clutch, is required to cut off transmission to the pawl barrel mounted on the inner rotary shaft and couple to a transmission system for driving the pawl barrel mounted on the outer rotary shaft. Therefore, the transmission system becomes complicated, and the operation of changing the working posture has a troublesome point.
[0005]
The present invention relates to a rotary tilling device and other partial forward / reverse rotary devices having a simple structure without complicating a power transmission system for transmitting power to a claw shaft cylinder mounted on both the inner and outer rotary shafts. The tilling claw (working blade) on the rotary shaft side and the cultivating claw (working blade) on the outer rotary shaft side are simultaneously rotated in the normal and reverse directions, and the tilling claw (working blade) is reversed. ) Can be converted into a posture for ground work only, and the ground work width can be set to be wider and narrower in a posture for ground work only by the reversing work blade. The adaptability of ground work was improved.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is characterized in that the inner and outer dual rotary shafts supported by the drive case are rotated in opposite directions to each other to attach the work blade and the inner rotary shaft mounted on the outer rotary shaft. In a partial forward / reverse rotary apparatus for simultaneously performing forward / reverse rotation of an attached work blade and performing ground work, a work blade attached to an outer rotary shaft is disposed at a position adjacent to a drive case. The work blade attached to the inner rotary shaft is arranged on a shaft cylinder that is detachable from the inner rotary shaft so that it can be rotated forward. An outer rotary shaft that is detachable from the outer rotary shaft by removing the shaft cylinder that is detachable from the tally shaft and covering the outer protruding portion of the inner rotary shaft that protrudes outward from the outer rotary shaft with a covering member. Ground work can be performed only by the work blade on the side.
[0007]
According to a second aspect of the present invention, there is provided a work blade and an inner rotary shaft mounted on an outer rotary shaft by rotating the inner and outer dual rotary shafts supported by a drive case in mutually opposite directions. A partial forward / reverse rotary device for simultaneously performing forward / reverse rotation of an attached work blade and performing ground work, wherein a work blade attached to an outer rotary shaft is attached to a portion adjacent to a drive case. The work blade mounted on the inner rotary shaft is arranged on a shaft cylinder that is detachable from the inner rotary shaft and can be rotated forward. The outer cylinder, which is detachable from the rotary shaft, is detached, and the outer protruding portion of the inner rotary shaft protruding outward from the outer rotary shaft is covered with a covering member, and the outer rotor is rotated in the reverse direction. The grounding work can be performed only by the work blade on the side of the tally shaft. The enclosing member for covering the protruding portion is formed as an extension shaft cylinder having a reversing work blade attached to the outer periphery, and the extension shaft cylinder is rotatably inserted into an outwardly projecting portion of the shaft cylinder. The inner end of the extended shaft cylinder is flange-coupled to the outer rotary shaft and is rotated in reverse with the outer rotary shaft, so that the working blade on the outer rotary shaft can be widened to the ground. I can do it.
[0008]
According to a third aspect of the present invention, there is provided a working blade and an inner rotary shaft mounted on the outer rotary shaft side by rotating the inner and outer dual rotary shafts supported by the drive case in opposite directions. This is a partial forward / reverse rotary device for simultaneously performing normal / reverse rotation of the work blade mounted on the outer side and ground work, wherein the work blade mounted on the outer rotary shaft side is adjacent to the drive case. The work blade mounted on the inner rotary shaft side is arranged on a shaft cylinder that is detachable from the inner rotary shaft, and can be rotated forward. The shaft barrel detachable from the normally rotating inner rotary shaft is removed, and an extended shaft barrel having a work blade on the outer periphery is rotatably inserted and supported on the outwardly projecting portion thereof. The extension shaft cylinder is flanged to the outer rotary shaft side to be reversed with the outer rotary shaft. In the case where a ring-shaped convex portion is formed on the joint surface side of the flange body installed on the outer rotary shaft side and a shaft cylinder rotating with the inner rotary shaft is mounted on the inner rotary shaft, a coaxial cylinder is formed. When the inwardly bent peripheral portion of the provided disk body overlaps the annular convex portion in a labyrinth structure and is provided with an extension barrel, the annular shape formed on the joint surface of the flange body on the extension barrel side is provided. The concave portion is adapted to fit in the ring-shaped convex portion.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment showing a case where the partial forward / reverse rotary device is a rotary tilling device connected to a walking type agricultural work vehicle will be described with reference to the drawings.
1 is an overall side view of a walking type agricultural work vehicle equipped with a partial forward / reverse rotary device, FIG. 2 is an overall plan view thereof, FIG. 3 is an enlarged plan view of the rotary tillage device extracted, and FIG. -It is a transmission sectional view of a tall tilling device.
[0010]
First, the overall configuration of a walking type agricultural work vehicle will be described. As shown in FIGS. 1 and 2, the walking type agricultural work vehicle is a traveling mission car that supports a pair of left and right traveling wheels (10) (10). An engine frame (12) extending from the traveling mission case (11) as a base, an engine (13) mounted on the engine frame (12) of the base, and an engine (13). A steering handle (14) extending rearward from the rear, and a rotary tillage device (15) connected to the rear of the base.
[0011]
The power transmission between the output shaft (16) of the engine (13) and the input shaft (17) of the traveling transmission case (11) can be freely switched by a main transmission mechanism built in the main transmission case (18). Interlockingly connected, power transmitted to the input shaft (17) is transmitted to the traveling wheels (10) and (10) via a transmission mechanism in the traveling mission case (11), and the traveling wheels (10) and (10) are transmitted. ) Is driven to rotate.
Further, power can be transmitted from the PTO shaft of the traveling transmission case (11) to the passive shaft (20) of the rotary tilling device (15) via the output transmission mechanism in the work output case (19). ing.
[0012]
The traveling transmission case (11) is formed by connecting an upper transmission mechanism accommodating section and a lower final transmission mechanism accommodating section at an intermediate portion having a narrow lateral width. The input shaft (17) and the speed change mechanism are housed in the speed change mechanism housing portion above the case, and the final transmission mechanism and the left and right axles (21) (21) interlocking with the input shaft (17) are located below the case. A transmission (not shown) which is housed and supported by the final transmission mechanism accommodating portion and which is separately transmitted from the input shaft (17) to the left and right axles (21) (21) is formed in the case.
[0013]
The left and right axles (21) and (21) extend laterally left and right from the final transmission mechanism accommodating portion of the traveling transmission case (11), and the traveling wheels (10) (10) extend to the extending portions of each axle. ) Is fixed. Then, the running wheels (10) (10) can be fixed at an arbitrary rut distance by changing the mounting position along the axis BB (see FIG. 2) of the left and right axles (21) (21). It has become.
[0014]
In changing the mounting position of the traveling wheels (10), it can be seen in FIG. 1 that the middle portion of the traveling transmission case (11) is formed narrower in the left and right directions as described above. As shown in FIG. 2, the traveling wheels (10) and (10) do not interfere with other surrounding members as viewed from the side, so that both traveling wheels (10) and (10) are attached to the base including the engine. Can be installed with a smaller distance between the ruts than the width of the rail, and by setting such a narrow distance between the ruts, it is possible to travel without difficulty even between furrows and between crop lines.
[0015]
On the other hand, an upper part of the traveling transmission case (12), that is, a rear part of the transmission mechanism accommodating portion, is connected with a working machine connecting body (22). The upper part of the drive case (23) of the tilling device (15) is directly attached, whereby the rotary tilling device (15) is integrally connected to the base of the walking type agricultural work vehicle.
[0016]
A shift guide plate (not shown) is provided on the work machine coupling body (22), and extends in a guide groove formed in the work implement coupling body (22) obliquely rearward and upward from the transmission mechanism housing portion of the traveling transmission case (11). The traveling transmission lever (24) is inserted and extended rearward, and the traveling transmission lever (24) is actuated along the guide groove to move to a desired engaging position. The speed change transmission in the case (11) can be switched between speed change and forward / reverse.
[0017]
The base of the steering handle (14) is attached to the left and right side surfaces of the work machine coupling body (22) so that the mounting angle can be adjusted. In the steering handle (14), (25) is a main drive cable. (26) is a parking brake lever, (27) is a side clutch lever, and (28) is an emergency stop deadman lever.
[0018]
A rotary tilling device (15) integrally connected to a walking type agricultural work vehicle via a working machine coupling body (22) includes a drive case (23) and a drive case (23). A drive unit cover (29) to be attached, a tail wheel device (30) attached to a holder extending in the rear direction of the work unit cover (29) so as to be vertically adjustable, and the like. A rotary shaft for ground work is provided horizontally below the base (23) so that its axis CC is parallel to the axis BB of the left and right axles (21) and (21).
The illustrated tail wheel device (30) is provided with a pair of left and right twin wheels (30a) (30a), which are located behind the vehicle body center line (AA) of the walking agricultural work vehicle. It may be a single wheel (30b) located on the extension line.
[0019]
As shown in FIG. 4, the drive case (23) of the rotary tillage device (15) has an upper switching mechanism accommodating portion and a lower rotary shaft bearing portion significantly more than these two portions. The left and right narrow intermediate portions are integrally connected to each other, and are formed by joining the left and right case halves together.
[0020]
A passive shaft (20), which is an input shaft of a power transmission mechanism housed in a drive case (23), is supported by bearings in the left and right lateral directions in the switching mechanism housing portion at the upper part of the case. ) Is extended to the right side of the walkable agricultural work vehicle, and the extending portion and the extending portion of the PTO shaft extending to the right side from the traveling mission case (11) extend forward. The work output case (19) is interlocked and connected by an output transmission mechanism inside.
[0021]
As shown in the upper half of FIG. 4, the switching mechanism accommodating portion above the drive case (23) is provided with the passive shaft (20) and a rotating shaft parallel to the passive shaft (22). (31) is supported by bearings, and a forward / reverse switching transmission mechanism is formed over the passive shaft (22) and the rotating shaft (31).
[0022]
Specifically, the idler gear (32) and the idler sprocket (33) are interposed between the idler gear (32) and the idler shaft (20), and are spline-fitted to the idler shaft (20) so as to be freely slidable. While a switching body (34) is provided, a passive gear (35) constantly meshing with the idle gear (32) and a passive sprocket (33) corresponding to the idle sprocket (33) are provided on the rotation shaft (31) side. 36) and an output sprocket (37) are integrally fitted with a transmission in an idle state, and a chain (38) is wound around the idle sprocket (33) and the passive sprocket (36). Thus, a forward / reverse switching transmission mechanism is configured.
[0023]
Then, when the forward / reverse switching unit (34) is slid in the axial direction of the passive shaft (20) to be clutch-coupled to the idle gear (32), the power of the passive shaft (20) is changed to the forward / reverse switching unit ( 34), the transmission is transmitted to the transmission via the idler gear (32), and the output sprocket (37) of the transmission is in a transmission state in which the transmission rotates in the forward direction. When the sliding movement is performed in the reverse direction and the free sprocket (33) is clutch-coupled, the power of the passive shaft (20) is changed to the forward / reverse switching body (34), the free sprocket (33), the chain (38), and the passive sprocket. The transmission sprocket (37) is transmitted to the transmission body via (36), so that the output sprocket (37) of the transmission body is in a transmission state in which it rotates in the reverse direction. Both clutched When held in a neutral position not, transmission from the output sprocket (37) is adapted to be stopped.
[0024]
The forward / reverse switching transmission mechanism normally switches to a transmission state in which the output sprocket (37) of the transmission body rotates forward, and switches to a transmission state in which the output sprocket (37) reversely rotates as necessary. The forward or reverse rotational power transmitted to the output sprocket (37) is transmitted to a rotary shaft drive mechanism housed in a rotary shaft support at the lower part of the drive case (23). However, the rotary shaft drive mechanism is configured as seen in the lower half of FIG.
[0025]
FIG. 4 shows a transmission state in which the output sprocket (37) of the forward / reverse switching transmission mechanism rotates forward. In FIG. 4, a pair of left and right rotary shaft supports at the lower part of the drive case (23) is provided. The outer rotary shafts (39) and (39) and the inner rotary shaft (40) extending right and left through the outer rotary shafts (39) and (39) so as to be relatively rotatable. The two rotary shafts (39), (39), (29) are located above the outer rotary shafts (39) and (39) and the inner rotary shaft (40), and are supported in a double shaft shape. An intermediate rotating shaft (41) parallel to 40) is rotatably supported by a bearing.
[0026]
A rotary shaft sprocket (42) is spline-fitted to the center of the inner rotary shaft (40) in the axial center inside the rotary shaft support portion, and the rotary shaft sprocket (42). The chain (43) is wound around the output sprocket (37) of the above-mentioned forward / reverse switching power transmission mechanism, and is supported on the intermediate portion of the drive case (23) to engage with the chain (43) from outside. The inner rotary shaft (40) is linked to the forward / reverse switching transmission mechanism by chain tensioning with an idle sprocket (44), whereby the inner rotary shaft (40) is counterclockwise in the side view state of FIG. It is configured to rotate around (forward rotation direction).
[0027]
A reverse input sprocket (45) meshing with the inside of the chain (43) is spline-fitted to the center of the intermediate rotary shaft (41) in the axial direction, and is rotated by the rotation of the chain (43). Thus, the intermediate rotation shaft (41) is rotated in the forward direction similarly to the inner rotary shaft (40).
[0028]
In the intermediate rotation shaft (41), reverse drive gears (46) and (46) are spline-mounted on both left and right sides of the reverse input sprocket (45), respectively, and the respective reverse drive gears (46) and (46). ) Are engaged with the reverse driven gears (47) (47) provided at the inner ends of the left and right outer output shafts (39) and (39), respectively, to connect the left and right outer output shafts (39) and (39). It is designed to rotate in the clockwise direction (reverse direction) opposite to the inner rotary shaft (40).
[0029]
The left and right outer rotary shafts (39) and (39) are externally fitted from their outer shaft ends and spline-connected to the outer rotary shafts (39) and (39). 48) and (48) are provided, and the portions of the first shaft cylinders (48) and (48) near the inner end in the axial direction are inserted into left and right bearings formed on the rotary shaft bearing. Are rotatably supported by bearings (49) and (49).
In other words, the outer rotary shafts (39) and (39) are supported on the rotary shaft support by the support of the first barrels (48) and (48), and the outer rotary shaft is also supported. (39) The inner rotary shaft (40) penetrated through (39) is also supported by the rotary shaft support.
[0030]
The first barrels (48) (48) rotating together with the outer rotary shafts (39) (39) protruding left and right from the rotary shaft support of the drive case (23) have a required number of shakes. A work blade (tiling) is provided on each blade mounting seat (50), which rotates clockwise (reverse direction) in the side view state of FIG. The claws 51) are inserted and fastened with bolts (52).
[0031]
A disk-shaped flange body (53) is fixed to an outer end of the first barrel (48) (48) in the axial direction, and the flange body (53) is attached to the blade mounting seat. It is provided by bonding to the outer surface of (50).
The portion overlapping with the bolt (52) is notched or opened (53a) so that the bolt (52) can be tightened and loosened from outside the flange body (53). An outwardly projecting annular projection (53b) is formed on the outer surface (joining surface side) of the flange body (53), and the outer diameter of the annular projection (53b) is equal to the first shaft cylinder (53). 48) is slightly larger than the outer diameter.
[0032]
On the other hand, the right and left outer output shafts (39) and (39) and the left and right extending portions (40a) of the inner rotary shaft (40) projecting laterally outward from the outer ends of the first barrels (48) and (48). (40a) is equipped with second barrels (54) (54) to be extrapolated from the respective outer ends and spline-coupled to the male splines engraved on the extending portions (40a) (40a). , Are secured by fixing bolts (55) and (55) which are inserted from the outer end side of the second barrels (54) and (54) and screwed into female screws formed in the inner rotary shaft (40). Fixed.
[0033]
At the inner end of each of the second barrels (54) and (54), a disk body (56) whose periphery is bent inward is fixed, and the second barrels (54) and (54) are fixed. When the disk body (56) is mounted in the above-described predetermined state, the bent peripheral portion covers the outer diameter of the annular convex portion (53b), and the bent peripheral portion and the annular convex portion (53b) overlap with a labyrinth structure. Thus, the first barrel (48) and the second barrel (54) prevent wrapping of grass and the like around adjacent portions, and the inner rotary shaft (40) and the outer rotary The intrusion of grass and the like into the fitting portion between the shaft (39) and the fitting portion between the outer rotary shaft (39) and the first barrel (48) is prevented.
[0034]
The required number of blade mounting seats (58) and (58) are also provided on the outer periphery of the left and right second shaft cylinders (57) and (57), and the respective blade mounting seats (58) and (58) are provided. ), A work blade (tiling claw 59) that rotates in a counterclockwise direction (forward rotation direction) in the side view state of FIG. 1 is attached and bolted.
[0035]
In the embodiment shown in FIG. 4, the right and left working areas (L1) and (L2) of the working blade (59) group attached to the left and right second barrels (57) and (57) are the drive cases. Set to be wider than the total working area (L3) of the working blades (51) group attached to the left and right first barrels (48) and (48) located on both sides of the shaft (23). In this setting state, the work area of the left first shaft cylinder (48) with the work blade (51) group and the left work area of the second shaft cylinder (57) with the work blade (59) group. Boundary to the work area, and the work area of the right first barrel (48) with the work blades (51) and the work area of the right second barrel (57) with the work blades (59). In or near the ruts of the left and right running wheels (10) and (10) when the distance between the ruts is minimized. Is adapted to position (see FIG. 2).
[0036]
When the tail wheel device (30) located behind the working unit cover (29) includes the two wheels (30a) and (30a), the left and right two wheels (30a) and (30a) are respectively the left and right working areas described above. (L1) Following the rear of (L2), and when the tail wheel device (30) is a single wheel (30b), the single wheel (30b) is a central rear portion of the above-described total working area (L3). Is to follow.
The left and right working widths (working areas L1, L2) of the working blades (59) group of the left and right second barrels (57) have different shaft lengths. Can be changed and set to an arbitrary width by selectively mounting on the left and right extending portions (40a) (40a) of the inner rotary shaft (40).
[0037]
A group of work blades (51) mounted on first shaft cylinders (48) and (48) that rotate together with the outer rotary shafts (39) and (39) and rotating clockwise (reverse rotation); The rotating spheres of both the working blades (59) group mounted on the second barrels (57) (57) driven to rotate by the rotary shaft (40) and rotating in the counterclockwise direction (forward rotation direction). The upper part and the left and right sides of the work part are covered by the working part cover (29).
A holder for supporting the tail wheel device (30) is attached to the drive case (23) separately from the working unit cover (29) and extends rearward.
[0038]
The working unit cover (29) includes a cover base (60) fixedly mounted on the drive case (23) at a position appropriately separated upward from the rotation zone of the working blades (51) and (59). Left and right top plates (62) and (62), which are mounted on the left and right edges of the cover base (60) via hinges (61) and (61) so as to be vertically rotatable, and left and right top plates (62). 62) and left and right side plate portions (63) and (63) respectively connected to the free end side of (62).
[0039]
At the front end of the cover base body (60), a front extension cover body (64) projecting forward is detachably or integrally provided, and the cover body (64) is attached to the outer body. A work blade (51) mounted on the first barrels (48) and (48) rotating together with the tally shafts (39) and (39) and rotating clockwise (reversely) to flip forward. It is designed to effectively prevent forward scattering of arable soil and the like.
[0040]
The above-mentioned left and right top plates (62) (62) are usually substantially the same as the cover base (60) by the opening adjustment fixing mechanism (65) formed over the upper and outer surfaces thereof. It is kept horizontal so as to be in a straight line, and by operating the opening adjustment and fixing mechanism (65) as necessary, the pivots (61a) (61a) of the hinges (61) (61) can be used as fulcrums. It can be rotated upward and held at an arbitrary angle.
[0041]
The pivot shafts (61a) (61a) of the left and right hinges (61) (61) are, as shown in FIG. 4, the working blades (51) of the left first barrel (48). The vicinity of a virtual extension extending upward through the boundary between the work area of the group and the work blade (59) of the second barrel (57) on the left side, and the first barrel (48) on the right side. ) Near an imaginary extension extending upward through the boundary between the work area of the work blade (51) group and the work area of the right second barrel (57) of the work blade (59) group. positioned.
[0042]
When the rotary tilling apparatus thus configured is in the transmission state shown in FIG. 4, as described above, the working blade (51) on the outer rotary shaft (39) (39) side is moved. The work blades (59) on the inner rotary shaft (40) side rotate in the counterclockwise direction (forward direction) and rotate in opposite directions. Tilling work of a predetermined width (L1 + L2 + L3) is performed by the two working blades (51) and (59). If the ground work is a soiling work, as shown in FIGS. You change your posture and do ground work.
[0043]
That is, in the case of the earthing work, the second shaft cylinders (54) (54) fitted in the left and right extending portions (40a) (40a) of the inner rotary shaft (40) in FIG. The extended shaft barrels (66A) and (66A) are inserted into the left and right extending portions (40a) and (40a) in a freely rotating state as shown in FIG. 5 and supported, and the respective extended shaft barrels (66A) and (66A) are removed. The rotary shafts (39) and (39) are connected to the first barrels (48) and (48), and are rotated together with the first barrels (48) and (48) in a clockwise direction (reverse direction). The work blades (67) and (67) mounted on the extension barrels (66A) and (66A) are also ready to be rotated together with the work blades (51) group mounted on the first barrel (48). The left and right top plates (62) and (62) of the working unit cover (29) are suitable as shown by phantom lines in FIG. Do the ground work to hold open to the angle.
[0044]
The extension barrels (66A) and (66A) enclose the left and right extending portions (40a) (40a) of the inner rotary shaft (40) from which the second barrels (54) and (54) are removed. A flange body (68) fixed to the inner end of each extension shaft cylinder (66A) is joined to the above-described flange body (53) on the first shaft cylinder (48) side. The two flange bodies (68) and (53) are fastened and fixed with a plurality of bolts (69), and the outer end side of each extension shaft cylinder (66A) is closed by a lid (70) integral therewith. ing.
[0045]
Further, on the inner surface side (the side joined to the flange body 53) of the flange body (68) fixed to the inner end of the extension shaft cylinder (66A), a ring-like shape formed on the flange body (53) is provided. A ring-shaped concave portion corresponding to the convex portion (53b) is formed, and when the two flange bodies (68) and (53) are joined together, the ring-shaped concave portion is seated in the ring-shaped convex portion (53b).
[0046]
The work blade (68) mounted on the extension shaft cylinder (66A) is inserted into a blade mounting seat (71) fixedly mounted on the outer periphery of the extension shaft cylinder (66A) and is bolted (72). The blade mounting seat (71a) located at the innermost end of the extension barrel (66A) is joined to the outer surface of the flange body (68) at the inner end of the extension barrel (66A). The bolt (72a) for tightening the work blade (68) inserted into the blade mounting seat (71a) is overlapped with the flange body (68). (68) (53) is also tightened together.
[0047]
When the operation is performed with the posture changed as shown in FIG. 5, the extension shaft cylinders (66A) and (66A) are supported by being externally inserted into the left and right extending portions (40a) and (40a) of the inner rotary shaft (40). Since the flanges (68) and (53) of the spigot-fitting structure are connected to the first barrel (48) side, the support becomes robust.
In this case, if the distance between the ruts of the traveling wheels (10) and (10) is changed to the minimum as shown by the imaginary line in FIG. The rotary tilling device (15) is located in the furrow, and at this time, it extends with the working blades (51) group mounted on the first barrel (48). All of the work blades (67) and (67) mounted on the shaft cylinders (66A) and (66A) are up-cut in the reverse direction (the direction opposite to the rotation direction of the traveling wheel 10) to rotate the cultivated soil forward and upward. It is flipped up and moved along the left and right top plates (62) and (62) of the working section cover (29) where the cultivated soil is appropriately held at an open angle, and above the ridges (U) and (U) on both sides. Is effectively thrown at
[0048]
FIG. 7 shows another example of the attitude change. In this example, the left and right extending portions (40a) (40a) of the inner rotary shaft (40) from which the second barrels (54) and (54) are removed. ) With the envelopes (66) and (66), and the working blades (48) and (48) mounted on the first shaft cylinders (48) and (48) on the side of the rotating outer rotary shafts (39) and (39). 51) The ground work can be performed only by the (51) group. In this case, the ground work width by the reversing work blade (51) group becomes the minimum width, and the narrow part is buried. In addition to performing the work, it is also possible to perform a groove forming work as shown by a virtual line in FIG.
[0049]
In FIG. 7, the envelope (66) is attached to the left and right extending portions (40a) (40a) of the inner rotary shaft (40) in the same manner as the extension shaft barrels (66A) (66A). It is inserted and supported in a free rotation state, and it is fixed to the first barrel (48) by flange connection. The envelope (66) is, for example, an inner rotary shaft (40). It may be provided with any other support fastening structure such as a structure fastening to the side.
[0050]
In the illustrated embodiment, since the switching mechanism accommodating portion above the drive case (23) is provided with the forward / reverse switching transmission mechanism, the forward / reverse switching body (34) of the forward / reverse switching transmission mechanism is provided. By switching the output sprocket (37) so that it rotates in the opposite direction by clutching the idle sprocket (33), the first shaft cylinder (48) on the outer rotary shaft (39) (39) side in the state of FIG. The work blades (51) mounted on the (48) are rotated forward and the work blades mounted on the second barrel (57) (57) on the inner rotary shaft (40) side. The work can be performed by reversing the blades (59) group. In addition, all the work blades can be operated in the normal rotation in the state of FIGS.
[0051]
【The invention's effect】
Since the partial forward / reverse rotary device according to the present invention is configured as described above, it is simple without complicating the power transmission system for transmitting power to the claw shaft cylinders mounted on the inner and outer rotary shafts. The work blade on the inner rotary shaft side and the work blade on the outer rotary shaft side are simultaneously rotated normally and reversely, and ground work is performed only by the reverse work blade. It can be easily converted to a posture to perform, and the ground work width can be changed and set to be wide when the ground work is performed by the reversing work blade, thereby improving the adaptability of the ground work.
[Brief description of the drawings]
FIG. 1 is an overall side view of a walking type agricultural work vehicle equipped with a partial forward / reverse rotary device.
FIG. 2 is an overall plan view of the same.
FIG. 3 is a plan view showing a rotary tilling device extracted and enlarged.
FIG. 4 is a transmission sectional view of a rotary plow.
FIG. 5 is a partial view showing an example of a change in the working posture of the rotary tillage device.
6 is a partial side view of FIG. 5 as viewed from the left.
FIG. 7 is a partial view showing another example of a change in the working posture of the rotary tillage device.
[Explanation of symbols]
23 Drive Case
39 Outer rotary shaft
40 Inner rotary shaft
40a outward protruding part
51 Work blade
53 Flange body
53b annular convex
54 shaft barrel
56 disk
59 Work blade
66 Envelope
68 Flange body
66A Extension shaft cylinder

Claims

The work blade (51) attached to the outer rotary shaft (39) by rotating the inner and outer dual rotary shafts (40) and (39) supported by the drive case (23) in opposite directions. ) And a work blade (59) mounted on the inner rotary shaft (40) side at the same time in a forward / reverse rotation rotary device for performing ground work, the outer rotary shaft (39) side. The work blade (51) attached to the drive case (23) is arranged at a position adjacent to the drive case (23) to be reversed, and the work blade (59) attached to the inner rotary shaft (40) is A shaft cylinder (54) which is detachable with respect to the inner rotary shaft (40) is arranged so as to be capable of normal rotation, and is detachable with respect to the normally rotating inner rotary shaft (40). An outer protruding portion of an inner rotary shaft protruding outward from the outer rotary shaft (39) by removing the shaft cylinder (54) ( 0a) is covered with an envelope (66), and the ground work can be performed only by the work blade (51) on the side of the outer rotary shaft (39) that rotates in the reverse direction. Tali equipment.

The work blade (51) attached to the outer rotary shaft (39) by rotating the inner and outer dual rotary shafts (40) and (39) supported by the drive case (23) in opposite directions. ) And a work blade (59) mounted on the side of the inner rotary shaft (40) to simultaneously perform forward and reverse rotations to perform a grounding operation. The work blade (51) mounted on the side of the inner rotary shaft (40) is arranged in a position adjacent to the drive case (23) to reverse the work blade (59). ) Is disposed on a shaft cylinder (54) that is detachable from the inner rotary shaft (40) so that it can be rotated forward, and is detachable from the forward rotating inner rotary shaft (40). The outer cylindrical shaft (54) is removed and the outer part of the inner rotary shaft protruding outward from the outer rotary shaft (39) ( 0a) is covered with an envelope (66) so that ground work can be performed only by the work blade (51) on the side of the outer rotary shaft (39) which is reversed. The envelope covering the outwardly protruding portion (40a) is formed on an extension shaft cylinder (66A) having a work blade (67) mounted on the outer periphery, and the extension shaft cylinder (66A) is attached to the inner cylinder. -The outer protruding portion (40a) of the tally shaft (40) is rotatably externally inserted and supported, and the inner end thereof is connected to the outer rotary shaft (39) by flanges (53) and (68). A partial forward / reverse rotary apparatus, characterized in that it is rotated in reverse with the tally shaft (39) so that the working width on the ground by the work blade on the outer rotary shaft (39) side can be widened.

The work blade (51) attached to the outer rotary shaft (39) by rotating the inner and outer dual rotary shafts (40) and (39) supported by the drive case (23) in opposite directions. ) And a work blade (59) mounted on the side of the inner rotary shaft (40) are simultaneously rotated in the forward and reverse directions to carry out ground work. The work blade (51) mounted on the side of the inner rotary shaft (40) is arranged in a position adjacent to the drive case (23) to reverse the work blade (59). ) Is disposed on a shaft cylinder (54) that is detachable from the inner rotary shaft (40) so that it can be rotated forward, and is detachable from the forward rotating inner rotary shaft (40). The shaft cylinder (54) is detached and extended to the outwardly protruding portion (40a) of the cylinder having a work blade (67) on the outer periphery. The shaft barrel (66A) is rotatably inserted and supported externally, and the extended shaft barrel (66A) is connected to the outer rotary shaft (39) by flanges (53) and (68) to connect the outer rotary shaft (39). ), A ring-shaped convex portion (53b) is formed on the joint surface side of the flange body (53) installed on the outer rotary shaft (39) side, and the inner rotary shaft (53) is formed. When the shaft cylinder (54) that rotates together with the shaft cylinder (54) is mounted on the coaxial cylinder (54), the inwardly bent peripheral edge of the disk body (56) is formed in a labyrinth structure on the annular convex part (53b). When the extension shaft cylinder (66A) is mounted by being crowned and superposed, the annular concave portion formed on the joint surface of the flange body (68) on the extension shaft tube (66A) side is attached to the annular convex portion (53b). A partial forward / reverse rotation rotary device, which is adapted to be in-fitted.