JP3668431B2 - Agricultural machine - Google Patents

Agricultural machine Download PDF

Info

Publication number
JP3668431B2
JP3668431B2 JP2001031490A JP2001031490A JP3668431B2 JP 3668431 B2 JP3668431 B2 JP 3668431B2 JP 2001031490 A JP2001031490 A JP 2001031490A JP 2001031490 A JP2001031490 A JP 2001031490A JP 3668431 B2 JP3668431 B2 JP 3668431B2
Authority
JP
Japan
Prior art keywords
work
tillage
shaft
tilling
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2001031490A
Other languages
Japanese (ja)
Other versions
JP2002233207A (en
Inventor
元紀 佐藤
盛人 小出
Original Assignee
松山株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 松山株式会社 filed Critical 松山株式会社
Priority to JP2001031490A priority Critical patent/JP3668431B2/en
Publication of JP2002233207A publication Critical patent/JP2002233207A/en
Application granted granted Critical
Publication of JP3668431B2 publication Critical patent/JP3668431B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Soil Working Implements (AREA)
  • Agricultural Machines (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、フレームの機能をもった耕耘カバー手段を備えた農作業機に関する。
【0002】
【従来の技術】
従来の農作業機は、例えば、入力軸を保持したミッションケースを取り付けた肉厚円筒状の主パイプフレームを主体としてフレームを構成し、このフレームにて耕耘カバーおよび耕耘作業体を支持した構造となっている。
【0003】
【発明が解決しようとする課題】
しかしながら、上記従来の農作業機のように、肉厚円筒状の主パイプフレームを主体としてフレームを構成したのでは、軽量化を図れないばかりでなく、構成が複雑で、組立て作業に手間がかかり、コスト高となるおそれがある問題を有している。
【0004】
本発明は、このような点に鑑みなされたもので、軽量化を図ることができ、かつ、構成が簡単で、組立て作業を容易にでき、製造コストを低減できる農作業機を提供することを目的とする。
【0005】
【課題を解決するための手段】
請求項1記載の農作業機は、動力伝達部を有する耕耘カバー手段と、前記動力伝達部からの駆動力で回転して耕耘作業をする一の耕耘作業体と、この一の耕耘作業体に対して折り畳み可能とされ、非折り畳み時に前記一の耕耘作業体からの駆動力で回転して耕耘作業をする他の耕耘作業体と、前記一の耕耘作業体にて耕耘砕土された土を平らにする一の整地体と、前記他の耕耘作業体にて耕耘砕土された土を平らにする他の整地体と、操作レバー体の操作により前記一の整地体と前記他の整地体とを一斉に代掻作業状態および土引き作業状態に切り換える作業状態切換え手段とを備え、前記耕耘カバー手段は、前記一の耕耘作業体から放出される土の飛散を防止するカバーの機能および前記一の耕耘作業体を支持するフレームの機能をもった略板状の一のカバー体と、この一のカバー体に対して折り畳み可能とされ、前記他の耕耘作業体から放出される土の飛散を防止するカバーの機能および前記他の耕耘作業体を支持するフレームの機能をもった略板状の他のカバー体と、この他のカバー体の外側の側板フレームの補強を兼ねた折り畳み用ハンドルとを有し、前記折り畳み用ハンドルは前記側板フレームの外面下縁部に沿って固着され、この折り畳み用ハンドルの把持部が前方に向って突出しているものである。
【0006】
そして、この構成では、耕耘カバー手段の略板状の一のカバー体に、一の耕耘作業体から放出される土の飛散を防止するカバーの機能および一の耕耘作業体を支持するフレームの機能をもたせ、かつ、耕耘カバー手段の略板状の他のカバー体に、他の耕耘作業体から放出される土の飛散を防止するカバーの機能および他の耕耘作業体を支持するフレームの機能をもたせた構成であるから、肉厚円筒状の主パイプフレームが必要でなく、軽量化を図ることが可能となり、かつ、構成が簡単で、組立て作業が容易になる。
【0007】
請求項2記載の農作業機は、請求項1記載の農作業機において、折り畳み用ハンドルは、一端側に把持部を有する細長パイプにて形成されているものである。
【0008】
そして、この構成では、折り畳み用ハンドルにて他のカバー体を補強できるとともに、折り畳み用ハンドルを利用して他のカバー体を他の耕耘作業体とともにより一層容易に折り畳むことが可能となる。
【0009】
請求項記載の農作業機は、請求項または記載の農作業機において、一のカバー体と他のカバー体との間に位置してこの他のカバー体を折り畳み方向に付勢する付勢体を備えているものである。
【0010】
そして、この構成では、付勢体が一のカバー体と他のカバー体との間に位置してこの他のカバー体を折り畳み方向に付勢するので、他のカバー体を他の耕耘作業体とともに容易に折り畳むことが可能となる。
【0011】
請求項記載の農作業機は、請求項ないしのいずれかに記載の農作業機において、折り畳み状態にある他のカバー体を一のカバー体に対して2重にロックする折り畳みロック部を備えているものである。
【0012】
そして、この構成では、折り畳みロック部にて折り畳み状態にある他のカバー体を一のカバー体に対して2重にロックできるので、他のカバー体が不用意に非折り畳み状態になるのを確実に防止可能である。
【0013】
【発明の実施の形態】
以下、本発明の農作業機の一実施の形態の構成を図面を参照して説明する。
【0014】
図1ないし図4において、1は折り畳み式の農作業機で、この農作業機1は、牽引車であるトラクタ(図示せず)に着脱可能に装着して使用する牽引式のセンター式ドライブハロー等で、トラクタの牽引動作により進行方向イに移動しながら、代掻作業、土引き作業等の土作業を行うものである。
【0015】
この農作業機1は、進行方向イと交差する方向である左右水平方向に細長い機体2を備え、この機体2は、機体2幅寸法を必要に応じて短くできるように、長手方向の中間の2箇所の位置で折り畳み可能な構成とされている。なお、図1は機体2をキャスター付きスタンド3で支持した非作業状態を示し、図4はキャスター付きスタンド3を取り外した機体2をトラクタに装着した作業状態を示している。
【0016】
そして、機体2は、この機体2の長手方向中央部に水平状に位置する主作業部5と、この主作業部5の左右両側に折り畳み可能つまり回動可能に設けられた左右一対の延長作業部である副作業部6,6とにて構成されている。
【0017】
各副作業部6は、主作業部5側とは反対側の外端部側が昇降するように略前後方向の回動軸8を中心として所定回動範囲内(例えば0度〜略100度の範囲)で回動可能とされ、一方向である折り畳み方向Aへの回動により起上り状態である折り畳み状態(非作業状態)となり、他方向である折り畳み解除方向Bへの回動により主作業部5に連続した水平状態である非折り畳み状態(作業状態)となる(図2参照)。
【0018】
まず、主作業部5について説明すると、この主作業部5は、図1ないし図3に示すように、トラクタ連結部としての三点連結部11を備え、この三点連結部11は、トップピン12が取り付けられた1本のトップマスト13、ロワピン14が取り付けられた左右一対で2本のロワアーム15等にて構成されている。この三点連結部11は、図示しないトラクタの後部に設けられた作業機昇降用の油圧式支持装置としての三点リンク機構(三点ヒッチ部)に着脱可能に装着される。なお、三点リンク機構は、1本のトップリンク、左右一対で2本のロワリンク等にて構成されている。
【0019】
また、主作業部5は、入力軸保持部であるミッションケース17を備え、このミッションケース17にて略前後方向の入力軸18が回転可能に保持されている。この入力軸18の先端部にはトラクタのPTO軸がユニバーサルジョイント等を介して連結される。入力軸18の基端部には、図5に示されるようにベベルギヤ19a,19b、スプロケット20a,20b、チェーン21等からなる伝動機構23が連結されている。また、ミッションケース17の下部には伝動ケース24の上端部が取り付けられ、この伝動ケース24内に伝動機構23の一部が収容されている。
【0020】
さらに、主作業部5は、折り畳み状態にある副作業部6を主作業部5に対して2重にロック可能な左右一対の2重ロック装置である折り畳みロック部25,25を備えている。
【0021】
ここで、各折り畳みロック部25は、図2、図3、図8等に示すように、後述の一のカバー体71の上面に立設された取付け板31を有し、この取付け板31に、略く字状の係合凹部28が上縁部に切欠き形成された前後一対の板状のベース29,29が取り付けられ、これら各ベース29間には回動軸8が架け渡されている。また、前側のベース29の前面には先端部が径大の突起32が設けられ、この突起32は係合凹部28の近傍に配置されている。
【0022】
また、各折り畳みロック部25は、ばね性を有した操作部材である操作レバー30を有し、この弾性変形可能な操作レバー30は、例えば金属線状部材を複数箇所で折り曲げて形成したもので、基端部で取付け板31に取り付けられ、先端部に把持部30aが形成されている。
【0023】
さらに、各折り畳みロック部25は、副作業部6に設けられた略前後方向の軸部27aを中心として上下方向に回動自在の回動アーム27を有し、この回動アーム27は例えば略コ字形状に形成されている。また、この回動アーム27は、軸部に嵌着されたねじりばね33により、先端側が下降する方向(図8中、反時計回り)に付勢されている。
【0024】
さらに、この回動アーム27の先端部に、係合凹部28に対して係脱する係合ピン26が取り付けられており、この係合ピン26の前側の一端部に把持部26aが形成されている。
【0025】
そして、図8の2点鎖線で示す非折り畳み状態から図8の実線で示す折り畳み状態に切り換えるにあたって、作業者が副作業部6を回動軸8を中心として回動させると、この回動に応じて回動アーム27の係合ピン26が、ベース29の上縁部に沿って係合凹部28側に向って移動する。そして、係合ピン26が係合凹部28の位置に到達すると、この係合ピン26は、係合凹部28内に入り込み、この係合凹部28と係合する。この係合ピン26と係合凹部28との係合にて、主作業部5に対する副作業部6の1段階目のロックが完了する。
【0026】
その後、作業者は、操作レバー30の把持部30aを把持し、操作レバー30の所定の中間部下面側を係合ピン26に押し付けながらやや変形させ、操作レバー30の所定の中間部上面側を突起32に当接係合させる。この結果、係合ピン26と係合凹部28との係合の解除が、操作レバー30にて禁止された状態になり、主作業部5に対する副作業部6の2段階目のロックが完了する。
【0027】
一方、この折り畳みロック部25による2重ロックを解除して、副作業部6を作業状態である非折り畳み状態にする場合には、作業者は、操作レバー30によるロックを解除してから、回動アーム27の把持部26aを把持し、この回動アーム27をねじりばね33の付勢力に抗して回動させ、係合ピン26と係合凹部28との係合を解く。その後、副作業部6を回動軸8を中心として回動させる。
【0028】
また一方、主作業部5は、筒状に形成された左右一対のスタンド取付け部41,41を備え、これら左右一対のスタンド取付け部41,41間には左右水平方向に細長い角パイプにて構成された横杆42が架け渡され、この横杆42の両端部に略前後方向のロック用ピン43が取り付けられている。そして、副作業部6に設けられた回動操作部材45の係合部46と横杆42のロック用ピン43との係合により、作業状態である非折り畳み状態にある副作業部6が主作業部5に対してロックされるようになっている。
【0029】
また一方、主作業部5は、図1、図5等に示すように、トラクタ側からの駆動力を入力軸18および伝動機構23を介して受けて駆動回転することにより耕耘作業をする一の土作業体としてのロータリである耕耘作業体51を備えている。
【0030】
この一の耕耘作業体51は、進行方向イと交差する方向である左右水平方向に長手方向を有する細長形状をなし、長手方向中央部が伝動ケース24の下端部に取り付けられ、この伝動ケース24によって1点状に支持つまり片持ち状態に支持されている。すなわち、主作業部5の一の耕耘作業体51は基本的に伝動ケース24にて1点で支持されている。
【0031】
ここで、この一の耕耘作業体51は、図5に示すように、例えば、伝動ケース24の下端部に固着された軸受24aにて1点状に軸支された駆動回転軸としての一の耕耘軸53と、この一の耕耘軸53の外面側に放射状に突出するように取り付けられた複数の耕耘爪54とにて構成されている。なお、各耕耘爪54は一の耕耘軸53の軸方向一端側から他端側の略全体にわたって互いに等間隔をおいて取り付けられている。
【0032】
また、一の耕耘軸53は、図6および図7に示すように、伝動ケース24の軸受24aにて1点状に軸支された左右水平方向の軸本体部材55を有し、この軸本体部材55の軸方向両端部には、外方側つまり副作業部6側に向って縮径した截頭円錐形状の一方の動力伝達部材56,56が同軸上にそれぞれ取り付けられている。なお、軸本体部材55の軸方向中央部が伝動ケース24内に位置し、この伝動ケース24内に位置する部分に、伝動機構23のスプロケット20bが取り付けられている。
【0033】
左右一対の一方の動力伝達部材56は、それぞれ、軸本体部材55の軸方向に互いに離間対向した円板状の径大板部57および径小板部58を有し、これら径大板部57および径小板部58の各周縁部間が、中心軸線が軸本体部材55の回転中心軸線X1と一致した截頭円錐面部59にて一体に連結されている。
【0034】
そして、この軸本体部材55の回転中心軸線X1と一致した中心軸線を有する仮想円錐面上の截頭円錐面部59の外周面にて、傾斜状の一方の動力伝達用摩擦面としての駆動側摩擦面60が構成されており、この駆動側摩擦面60は、その仮想円錐面上に周方向に連続した状態で位置している。なお、一方の動力伝達部材56にて一方の嵌合部61が形成されている。
【0035】
さらに、この一方の動力伝達部材56の径大板部57には、複数、例えば3つの一方の動力伝達用耕耘爪部材63,63,63が異なる3方向を向いて放射状に取り付けられ、ボルト等の固定具64で固定されている。
【0036】
3つの一方の動力伝達用耕耘爪部材63は、図6および図7に示すように、それぞれ、径大板部57に沿って位置する細長板形状のアーム部65を有し、このアーム部65の径大板部57から突出した先端部には、所定の鈍角をもって径小板部58側に向って突出した板状の爪部66が一体に形成され、この爪部66は截頭円錐面部59の外方に位置している。
【0037】
この板状の爪部66は、図6に示されるように、軸本体部材55の回転中心軸線X1を含む平面に沿って位置せず、基端側から先端側に向って軸本体部材55の回転方向を向いた面に対して鋭角の傾斜角度αをもって傾斜している。また、この板状の爪部66は、図7に示されるように、先端部が軸本体部材55の回転中心軸線X1と直交する直交線上に位置している。そして、この板状の爪部66の回転方向側の面にて係合部としての係合面69が形成されている。すなわち、爪部66の回転方向側の面に、一の耕耘軸53の軸方向に対して所定の傾斜角度αをもって傾斜した傾斜状の係合面69が形成されている。
【0038】
一方、主作業部5は、図3、図5等に示すように、一の耕耘作業体51の上方に位置してこの一の耕耘作業体51の上方を覆う全体にわたって略板状の一のカバー体71を備え、この一のカバー体71は、左右方向に長手方向を有する細長略矩形薄肉板状でかつやや湾曲した形状に形成されており、この一のカバー体71の長手方向中央部である機体2中央部には、図5に示されるように、トラクタからの駆動力を伝達する一体化されたミッションケース17および伝動ケース24が取り付けられている。なお、この一体化されたミッションケース17および伝動ケース24にてトラクタからの駆動力を一の耕耘作業体51側に伝達する動力伝達部70が構成されている。
【0039】
そして、一のカバー体71は、一の耕耘作業体51から上方に放出される土の飛散を防止するカバーの機能と、伝動ケース24を介して一の耕耘作業体51を支持するフレームの機能とをもっている。なお、この一のカバー体71は、例えば金属材料等で薄肉板状に形成されたものであるが、一の耕耘作業体51を適切に支持可能な所定の強度をもっている。また、この一のカバー体71に、三点連結部11、折り畳みロック部25、スタンド取付け部41等が取り付けられている。
【0040】
この一のカバー体71の後端部には、左右方向に長手方向を有する細長略矩形板状の弾性変形可能な連結体としてのゴム板等の弾性連結体72の前端部が取り付けられている。この弾性連結体72の後端部には、左右方向に長手方向を有する細長略矩形板状の均平板等の一の第1の整地体73の前端部が取り付けられている。この一の第1の整地体73の後端部には、左右方向に長手方向を有する細長略矩形板状のレーキ板等の一の第2の整地体74の前端部が左右方向のピン等の回動軸75を介して回動可能に取り付けられている。
【0041】
そして、一の第1の整地体73、一の第2の整地体74等にて一の整地体77が構成されており、この一の整地体77は、一の耕耘作業体51にて耕耘砕土された土を平らにする代掻作業時には、圃場の状態に応じて弾性連結体72の変形に基づいて前端側を中心として上下方向に回動するとともに、左右方向にやや回動する。
【0042】
次いで、左右一対の副作業部6,6について説明するが、進行方向イ左側の一方側の副作業部6と、進行方向イ右側の他方側の副作業部6とは、左右対称に構成されている点が異なるのみで基本的構成は同一であるため、一方側の副作業部6を中心に説明する。なお、他方側の副作業部6の各構成部材は、一方側の副作業部6の各構成部材と同一符号を付してその説明を省略する。
【0043】
この一方側の副作業部6は、図1、図5等に示すように、主作業部5の一の耕耘作業体51に対して折り畳み可能つまり回動軸8を中心として回動可能とされ、非折り畳み時である水平状態時に一の耕耘作業体51からの駆動力を受けて回転して耕耘作業をする他の土作業体としての延長ロータリである耕耘作業体81を備えている。
【0044】
この他の耕耘作業体81は、進行方向イと交差する方向である左右水平方向に長手方向を有する細長形状をなし、長手方向両端部が左右一対の側板フレーム82,82の各下端部に軸受83を介して取り付けられ、これら両側板フレーム82によって2点状に支持つまり両持ち状態で支持されている。
【0045】
ここで、この他の耕耘作業体81は、図5に示すように、例えば、各側板フレーム82の下端部に固着された軸受83にて2点状に軸支された従動回転軸としての他の耕耘軸88と、この他の耕耘軸88の外面側に放射状に突出するように取り付けられた複数の耕耘爪89とにて構成されている。なお、各耕耘爪89は他の耕耘軸88の軸方向一端側から他端側の略全体にわたって互いに等間隔をおいて取り付けられている。
【0046】
また、他の耕耘軸88は、図5および図6に示すように各側板フレーム82の軸受83にて2点状に軸支された左右水平方向の軸本体部材90を有している。この軸本体部材90における一方の側板フレーム82より主作業部5側に突出した部分である軸方向一端部(非折り畳み時に一の耕耘軸53と対向する側の端部)には、主作業部5側に向って拡径しかつ主作業部5側の面を開口面とした截頭円錐形状の他方の動力伝達部材91が同軸上に取り付けられている。
【0047】
この他方の動力伝達部材91は、一方の動力伝達部材56の径小板部58と同径の円板部92を有し、この円板部92の周縁部に、中心軸線が軸本体部材90の回転中心軸線X2と一致した截頭円錐面部93が一体に形成されている。また、この截頭円錐面部93の内周面側は摩擦増大部材であるゴム製の環状部材94にて形成されている。
【0048】
この截頭円錐面部93の内周面にて、駆動側摩擦面60と面状かつ環状に圧接して一の耕耘軸53と他の耕耘軸88とを同軸上に位置させる傾斜状の他方の動力伝達用摩擦面としての従動側摩擦面95が構成されている。なお、この他方の動力伝達部材91にて、他の耕耘軸88の回動に応じて一方の嵌合部61に対して嵌合、嵌合解除する他方の嵌合部96形成されている。
【0049】
そして、他の耕耘軸88が一の耕耘軸53に向う方向に回動することにより、一方の嵌合部61と他方の嵌合部96とが嵌合して駆動側摩擦面60と従動側摩擦面95とが互いに面状に圧接し、互いに面状に圧接した駆動側摩擦面60と従動側摩擦面95との摩擦抵抗により動力伝達可能な状態になる。なお、傾斜したテーパー状の駆動側摩擦面60および従動側摩擦面95によるガイド作用により、求心力が働き、一の耕耘軸53の回転中心軸線X1と他の耕耘軸88の回転中心軸線X2とが一致する。
【0050】
さらに、この他方の動力伝達部材91の円板部92には、複数、例えば3つの他方の動力伝達用耕耘爪部材98,98,98が異なる3方向を向いて放射状に取り付けられ、ボルト等の固定具99で固定されている。
【0051】
3つの他方の動力伝達用耕耘爪部材98は、図6および図7に示すように、それぞれ、円板部92に沿って位置する細長板形状のアーム部100を有し、このアーム部100の円板部92から突出した先端部には、所定の鈍角をもって主作業部5側に向って突出した板状の爪部101が一体に形成され、この爪部101は截頭円錐面部93の外方に位置している。
【0052】
この板状の爪部101は、図6に示されるように、軸本体部材90の回転中心軸線X2を含む平面に沿って位置せず、基端側から先端側に向って軸本体部材90の回転方向を向いた面に対して鋭角の傾斜角度α(一方の動力伝達部材56の爪部66と同じ傾斜角度である)をもって傾斜している。また、この板状の爪部101は、図7に示されるように、先端部が軸本体部材90の回転中心軸線X2と直交する直交線上に位置している。そして、この板状の爪部101の回転方向反対側の面にて、係合面69に対して係脱自在の被係合部としての被係合面103が形成されている。すなわち、爪部101の反回転方向側の面に、他の耕耘軸88の軸方向に対して所定の傾斜角度αをもって傾斜した傾斜状の被係合面103が形成されている。また、板状の爪部101の回転方向側の面にて土押し面104が形成されている。
【0053】
そして、駆動側摩擦面60と従動側摩擦面95との圧接時に、一の耕耘軸53が他の耕耘軸88に対して相対的にやや回転すると一の耕耘軸53の係合面69と他の耕耘軸88の被係合面103とが互いに面状に当接して係合した状態となり、この係合面69と被係合面103との係合により一の耕耘軸53の回転が他方の耕耘軸88に伝わり、その結果、他の耕耘軸88が一の耕耘軸53と一体となって回転する。
【0054】
また、一の耕耘軸53の係合面69と他の耕耘軸88の被係合面103との係合により、一の耕耘軸53と他の耕耘軸88とが互いに接近する方向にやや移動し、駆動側摩擦面60と従動側摩擦面95との接触圧が増大する。
【0055】
一方、一方側の副作業部6は、図3、図5等に示すように、他の耕耘作業体81の上方に位置してこの他方の耕耘作業体81の上方を覆う全体にわたって略板状の他のカバー体111を備えている。
【0056】
この他のカバー体111は、左右方向に長手方向を有する細長で略矩形薄肉板状でかつやや湾曲した形状をなすカバー本体部111aと、このカバー本体部の長手方向両端部に下方に向って突出するように形成された略薄肉板状の側面部111b,111bとにて形成されている。なお、側面部111bは側板フレーム82にて構成されている。
【0057】
また、この他のカバー体111は、主作業部5の一のカバー体71に対して折り畳み可能つまり回動軸8を中心として回動可能となっている。すなわち、他のカバー体111は、一のカバー体71と他のカバー体111とを連結する第1ヒンジ等の連結部8aの回動軸8を中心として回動可能となっている。
【0058】
さらに、他のカバー体111の一方側である外側の側板フレーム82には、この略薄肉板状の側板フレーム82を補強する補強部材である折り畳み用ハンドル114が取り付けられている。この折り畳み用ハンドル114は、例えば長手方向中間の2箇所で屈曲した金属製の細長パイプにて形成され、一端側に把持部113が形成されている。また、この折り畳み用ハンドル114は、図4に示されるように側板フレーム82の外面下縁部に沿って固着され、把持部113が前方に突出している。なお、この折り畳み用ハンドル114は、側板フレーム82への雑物からみ防止の機能もある。
【0059】
そして、他のカバー体111は、他の耕耘作業体81から上方および側方に放出される土の飛散を防止するカバーの機能と、他の耕耘作業体51を支持するフレームの機能とをもっている。なお、この他のカバー体111は、例えば金属材料等で略コ字形の薄肉板状に形成されたものであるが、他の耕耘作業体81を適切に支持可能な所定の強度をもっている。
【0060】
また、この他のカバー体111の後端部には、左右方向に長手方向を有する細長略矩形板状の延長均平板等の他の第1の整地体116の前端部が左右方向のピン等の回動軸118を介して回動可能に取り付けられている。なお、左右一対の回動軸118は、それぞれ、側板フレーム82に開口形成された長孔119内および他のカバー体111の取付け板120に開口形成された長孔(図示せず)内にスライド移動自在に遊嵌されている。
【0061】
さらに、この他の第1の整地体116の後端部には、左右方向に長手方向を有する細長略矩形板状の延長レーキ板等の他の第2の整地体117の前端部が左右方向のピン等の回動軸121を介して回動可能に取り付けられている。
【0062】
そして、他の第1の整地体116、他の第2の整地体117等にて他の整地体123が構成されており、この他の整地体123は、他の耕耘作業体81にて耕耘砕土された土を平らにする代掻作業時には、圃場の状態に応じて一の整地体77と略一体となって上下方向に回動するとともに左右方向にやや回動する。
【0063】
なお、他の第1の整地体116は、一の第1の整地体73と他の第1の整地体116とを連結する第2ヒンジ等の連結部8bの回動軸8を中心として回動可能となっている。他の第2の整地体117は、一の第2の整地体74と他の第2の整地体117とを連結する第3ヒンジ等の連結部8cの回動軸8を中心として回動可能となっている。そして、他の整地体123は一の整地体77に対して折り畳み可能である。
【0064】
なお、主作業部5は、図4に示されるように操作レバー体125、連結リンク126、回動アーム127、連結ロッド128等にて構成された作業状態切換え手段130を備えており、この作業状態切換え手段130の操作レバー体125の操作で、一の整地体77と左右一対の他の整地体123,123とを一斉に代掻作業状態および土引き作業状態に切り換えられるようになっている。
【0065】
また、主作業部5の一のカバー体71と各副作業部6の他のカバー体111との間にはガススプリング等の付勢体131が設けられている。そして、この付勢体131が、他のカバー体111を折り畳み方向Aに付勢、すなわち、他のカバー体111をこの他のカバー体111の外側の端部が持ち上がるように付勢するため、各副作業部6の他のカバー体111および耕耘作業体81の回動動作つまり機体2の折り畳み動作を手動で容易に行えるようになっている。
【0066】
なお、一方の動力伝達部材56と他方の動力伝達部材91とにて円錐クラッチ133が構成され、一方の動力伝達用耕耘爪部材63と他方の動力伝達用耕耘爪部材98とにて爪クラッチ134が構成され、円錐クラッチ133と爪クラッチ134とで複合クラッチ部135が構成されている。また、一の耕耘軸53、他の耕耘軸88、複合クラッチ部135等にて動力伝達装置136が構成されている。なお、左右一対の複合クラッチ部135は、図5に示されるように、トラクタの車輪Cに対応する位置、すなわち、車輪Cの後方位置に配置されている。
【0067】
また、動力伝達部70、一のカバー体71、他のカバー体111、折り畳み用ハンドル114等にてフレーム機能を兼ねた耕耘カバー手段140が構成されている。また、機体2中央の一の耕耘作業体51、左右両側の他の耕耘作業体81,81等にて耕耘作業手段141が構成されている。そして、この耕耘作業手段141は、耕耘カバー手段140にて上方部が覆われるように支持されて動力伝達部70からの駆動力に基づいて耕耘作業を可能な構成となっている。
【0068】
次に、上記一実施の形態の動作について説明する。
【0069】
機体2の折り畳みを解除するに当たって、作業者が、折り畳みロック部25の2重ロックを解いてから、側板フレーム82の折り畳み用ハンドル114の把持部113を把持して、副作業部6を折り畳み解除方向Bに所定量回動させると、副作業部6の他の耕耘軸88が主作業部5の一の耕耘軸53に向う方向に回動し、この他の耕耘軸88の従動側摩擦面95と一の耕耘軸53の駆動側摩擦面60とが、伝動可能な接触圧をもって互いに面状に圧接する。
【0070】
すなわち、一の耕耘軸53の一方の動力伝達部材56が他の耕耘軸88の凹状の他方の動力伝達部材91内に進入し、他の耕耘軸88が一の耕耘軸53と同軸上の位置に位置すると、一方の動力伝達部材56が他方の動力伝達部材91にて嵌合保持される。その結果、伝動ケース24で支持された一の耕耘作業体51の一の耕耘軸53が、左右一対の他の耕耘軸88,88にて補助的に支持された状態になる。
【0071】
なお、この機体2の折り畳み解除動作の際に、駆動側摩擦面60と従動側摩擦面95との当接による求心力が一の耕耘軸53および他の耕耘軸88に働き、その結果、一の耕耘軸53の回転中心軸線X1と他の耕耘軸88の回転中心軸線X2とが一致する。
【0072】
そして、駆動側摩擦面60と従動側摩擦面95との圧接時に、トラクタ側からの駆動力が入力軸18および伝動機構23を介して一の耕耘軸53に伝達され、この一の耕耘軸53が所定方向に回転すると、この一の耕耘軸53の回転が、互いに圧接した駆動側摩擦面60および従動側摩擦面95を介して他の耕耘軸88に伝わる。すなわち、円錐クラッチ133により一の耕耘軸53からの駆動力が他の耕耘軸88に伝達される。なお、この円錐クラッチ133による動力伝達開始時に衝撃音等の騒音は発生しない。
【0073】
そして、この円錐クラッチ133による動力伝達により、他の耕耘軸88が、一の耕耘軸53と一体となってこの一の耕耘軸53の回転中心軸線X1と一致した回転中心軸線X2を中心として回転する。そして、3つの耕耘軸53,88,88の回転により耕耘爪54,89にて圃場の土が耕耘砕土され、3つの整地体77,123,123にて平らにされる。
【0074】
ここで、円錐クラッチ133の駆動側摩擦面60と従動側摩擦面95とが圧接した状態で、かつ、爪クラッチ134の係合面69と被係合面103とが係合していない状態で、土作業をしていた場合に、副作業部6の他の耕耘作業体81への負荷が増大すると、駆動側摩擦面60が従動側摩擦面95上を徐々に滑りながら回転し、各係合面69が各被係合面103に引っ掛るように係合する。
【0075】
なお、係合面69と被係合面103の係合には衝撃を伴わず、衝撃音等の騒音は発生しない。また、係合面69と被係合面103との係合により、一の耕耘軸53と他の耕耘軸88とが軸方向に沿って互いに接近する方向にやや移動し、駆動側摩擦面60と従動側摩擦面95との接触圧が、係合面69と被係合面103との係合解除状態時に比べて増大した状態になる。
【0076】
そして、この係合面69と被係合面103との係合時には、一の耕耘軸53の回転が、互いに圧接した駆動側摩擦面60および従動側摩擦面95と、互いに係合した係合面69および被係合面103とを介して、他の耕耘軸88に伝わる。すなわち、円錐クラッチ133および爪クラッチ134の両方により一の耕耘軸53からの駆動力が他の耕耘軸88に伝達される。
【0077】
そして、これら円錐クラッチ133および爪クラッチ134による複合動力伝達により、他の耕耘軸88が、一の耕耘軸53と一体となってこの一の耕耘軸53の回転中心軸線X1と一致した回転中心軸線X2を中心として回転する。そして、3つの耕耘軸53,88,88の回転により耕耘爪54,89にて圃場の土が耕耘砕土され、3つの整地体77,123,123にて平らにされる。このように、小さい負荷での動力伝達は円錐クラッチ133のみで行われるが、大きい負荷での動力伝達は円錐クラッチ133および爪クラッチ134で行われる。
【0078】
そして、上記一実施の形態によれば、主作業部5の一の耕耘作業体51の一の耕耘軸53を伝動ケース24に1点状で軸支した構成であるので、従来の構成では必ず必要であった一の耕耘軸53用の左右一対の側板フレームおよび軸受が不要となり、その分部品点数を少なくでき、構成を簡単にでき、よって、軽量化、コスト低減を図ることができる。
【0079】
また、一の耕耘軸53用の左右一対の側板フレームおよび軸受を不要にできるため、従来の構成に比べて圃場面に形成される残溝を少なくできる。
【0080】
さらに、主作業部5の一の耕耘作業体51の一の耕耘軸53を伝動ケース24にて軸支するとともに、両側の副作業部6の他の耕耘作業体81の他の耕耘軸88にて補助的に支持するので、一の耕耘軸53を確実に支持でき、安定した代掻作業等の土作業ができる。
【0081】
また、円錐クラッチ133と爪クラッチ134とで構成された複合クラッチ部135を備えた構成であるので、構成を簡単にでき、軽量化を図れるのみならず、従来のような衝撃音等の騒音が発生することがなく、動力伝達の際の騒音発生を確実に防止でき、かつ、従動側の他の耕耘軸88に対する圃場からの負荷の大小にかかわらず、駆動側の一の耕耘軸53から従動側の他の耕耘軸88に動力伝達を確実に行うことができる。
【0082】
さらに、駆動側の一の耕耘軸53と従動側の他の耕耘軸88との位相合わせが不要であり、複合クラッチ部135の入切を円滑かつ簡単にできる。
【0083】
また、駆動側摩擦面60および従動側摩擦面95のガイド作用による求心力で耕耘軸53,88の回転中心軸線X1,X2のずれをなくすことができ、回転中心軸線X1,X2のずれに基づく爪クラッチ134の磨耗や、騒音等を適切に防止できる。
【0084】
さらに、複合クラッチ部135の爪クラッチ134は、動力伝達を行うと同時に、耕耘砕土作業も行うので、一の耕耘軸と他の耕耘軸との連結部分における残溝を防止できる。また、複合クラッチ部135は、トラクタの車輪Cの後方位置で耕耘砕土作業をするので、この作業の際に複合クラッチ部135にかかる土からの負荷を軽減でき、よって、複合クラッチ部135の耐久性を良好にでき、複合クラッチ部135の寿命が長い。
【0085】
また、一の耕耘軸53には副作業部6側に向って縮径した截頭円錐形状の一方の動力伝達部材56を取り付け、かつ、他の耕耘軸88には主作業部5側に向って拡径した截頭円錐形状の他方の動力伝達部材91を取り付けた構成としたので、一の耕耘軸53に他方の動力伝達部材91を取り付けかつ他の耕耘軸88に一方の動力伝達部材56を取り付けた構成に比べて、一の耕耘軸53への土の付着を少なくでき、清掃作業等を容易にできる。
【0086】
さらに、一のカバー体71、他のカバー体111等を有した耕耘カバー手段140がフレーム機能をもたせ、この耕耘カバー手段140にて耕耘作業手段141を上方を覆うように支持した構成であるため、従来必要であった肉厚円筒状の主パイプフレームが必要でなく、軽量化を図ることができ、かつ、構成が簡単で、組立て作業を容易にでき、製造コストを低減できる。
【0087】
なお、上記実施の形態においては、機体2は、機体2幅寸法を必要に応じて短くできるように長手方向の中間の2箇所の位置で折り畳み可能な構成として説明したが、長手方向中央部の1箇所の位置で折り畳み可能な構成でもよく、3箇所以上の位置で折り畳み可能な構成でもよい。なお、機体2は、完全に重なるまで折り畳み可能な構成でも、重なることなく所定範囲内で折り畳み可能な構成でもよい。
【0088】
さらに、機体2を折り畳むことのできない折り畳み不可能な構成としてもよく、例えば、耕耘カバー手段140を略全体が1枚の薄肉板状をなすカバー体にて構成し、耕耘作業手段141を1つの耕耘作業体51にて構成してもよい。
【0089】
また、主作業部5の一の耕耘作業体51の一の耕耘軸53に加えて、副作業部6の他の耕耘作業体81の他の耕耘軸88を1点状の片持ち状態で支持した構成としてもよい。
【0090】
さらに、上記いずれの実施の形態でも、駆動回転軸は一の耕耘軸53で、従動回転軸は他の耕耘軸88であると説明したが、例えば、図示しないが、互いに独立して駆動する3つの駆動式の耕耘作業体を設けた折り畳み可能な機体が備えた駆動回転軸、従動回転軸等に適用することもできる。
【0091】
また、駆動側摩擦面60および従動側摩擦面95は、仮想円錐面上に周方向に連続した状態で位置する構成として説明したが、例えば、図示しないが、仮想円錐面上に周方向に断続した状態で位置する構成でもよい。
【0092】
さらに、一の耕耘軸53に他方の動力伝達部材91を取り付けかつ他の耕耘軸88に一方の動力伝達部材56を取り付けた構成でもよい。
【0093】
なお、土作業体である一の耕耘作業体51等の耕耘作業体を1点状に支持するとは、耕耘作業体を一支えで支持、或いは、耕耘作業体を1箇所で支持する等の意味であり、厳密な意味での1点支持には限定されず、例えば1つの伝動ケース24に設けた複数、例えば2つの軸受24aで軸支する場合も含まれる。
【0094】
【発明の効果】
求項記載の発明によれば、耕耘カバー手段の略板状の一のカバー体に、一の耕耘作業体から放出される土の飛散を防止するカバーの機能および一の耕耘作業体を支持するフレームの機能をもたせ、かつ、耕耘カバー手段の略板状の他のカバー体に、他の耕耘作業体から放出される土の飛散を防止するカバーの機能および他の耕耘作業体を支持するフレームの機能をもたせた構成であるから、肉厚円筒状の主パイプフレームが必要でなく、軽量化を図ることができ、かつ、構成が簡単で、組立て作業を容易にでき、製造コストを低減できる。
【0095】
請求項記載の発明によれば、折り畳み用ハンドルにて他のカバー体を補強できるとともに、折り畳み用ハンドルを利用して他のカバー体を他の耕耘作業体とともにより一層容易に折り畳むことができる。
【0096】
請求項記載の発明によれば、付勢体が一のカバー体と他のカバー体との間に位置してこの他のカバー体を折り畳み方向に付勢するので、他のカバー体を他の耕耘作業体とともに容易に折り畳むことができる。
【0097】
請求項記載の発明によれば、折り畳みロック部にて折り畳み状態にある他のカバー体を一のカバー体に対して2重にロックできるので、他のカバー体が不用意に非折り畳み状態になるのを確実に防止できる。
【図面の簡単な説明】
【図1】 本発明の農作業機の一実施の形態の側面図である。
【図2】 同上農作業機の正面図である。
【図3】 同上農作業機の平面図である。
【図4】 同上農作業機の作業時における側面図である。
【図5】 同上農作業機の一部を省略した正面図である。
【図6】 同上農作業機の耕耘軸の連結部の正面図である。
【図7】 同上耕耘軸の連結部の側面図である。
【図8】 同上農作業機の折り畳みロック部を示す図である。
【符号の説明】
1 農作業機
25 折り畳みロック部
51 一の耕耘作業体
70 動力伝達部
71 一のカバー体
81 他の耕耘作業体
111 他のカバー体
114 折り畳み用ハンドル
131 付勢体
140 耕耘カバー手段
141 耕耘作業手段
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an agricultural machine including a tilling cover means having a function of a frame.
[0002]
[Prior art]
A conventional agricultural machine has a structure in which a frame is mainly composed of a thick cylindrical main pipe frame to which a transmission case holding an input shaft is attached, and a cultivation cover and a cultivation work body are supported by this frame. ing.
[0003]
[Problems to be solved by the invention]
However, as in the conventional agricultural machine, the frame is mainly composed of a thick cylindrical main pipe frame. Not only can the weight be reduced, but the configuration is complicated and the assembly work takes time. There is a problem that the cost may increase.
[0004]
The present invention has been made in view of such points, and an object thereof is to provide an agricultural machine that can be reduced in weight, that has a simple configuration, can be easily assembled, and can reduce manufacturing costs. And
[0005]
[Means for Solving the Problems]
The agricultural working machine according to claim 1 is provided with a tilling cover means having a power transmission unit, a tilling work body that rotates by a driving force from the power transmission unit and performs a tilling work, and the one tilling work body. And flattening the soil cultivated and crushed by the one tillage work body, and the other tillage work body that rotates by the driving force from the one tillage work body when unfolded and the one tillage work body. The one leveling body, the other leveling body that flattens the soil cultivated by the other tillage work body, and the one leveling body and the other leveling body by operating the operation lever body Working state switching means for switching between the ground cutting work state and the earthing work state, and the tillage cover means has a function of a cover for preventing scattering of soil discharged from the one tilling work body and the one tillage. Has the function of a frame to support the work body One plate-like cover body, a cover function that can be folded with respect to the one cover body, and prevents the scattering of soil discharged from the other tillage work body and supports the other tillage work body Other substantially plate-shaped cover body with the function of a frame to perform And a folding handle that also serves to reinforce the side plate frame on the outside of the other cover body, and the folding handle is fixed along the lower edge of the outer surface of the side plate frame. The part protrudes toward the front Is.
[0006]
And in this structure, the function of the cover which prevents the scattering of the soil discharge | released from one tilling work body, and the function of the frame which supports one tilling work body to the substantially plate-shaped one cover body of the tilling cover means And a cover function for preventing the scattering of soil discharged from the other tillage work body and a frame function for supporting the other tillage work body on the other substantially plate-like cover body of the tillage cover means. Since it has a built-in configuration, a thick cylindrical main pipe frame is not required, it is possible to reduce the weight, the configuration is simple, and the assembly work is facilitated.
[0007]
The agricultural machine according to claim 2 is the agricultural machine according to claim 1. Fold The folding handle is formed of an elongated pipe with a grip on one end. Please It is what.
[0008]
In this configuration, the other cover body can be reinforced by the folding handle, and the other cover body can be folded together with the other tillage work body more easily by using the folding handle.
[0009]
Claim 3 Agricultural implements listed are claims 1 Or 2 The agricultural machine described above includes a biasing body that is positioned between one cover body and the other cover body and biases the other cover body in the folding direction.
[0010]
In this configuration, the urging body is positioned between the one cover body and the other cover body and urges the other cover body in the folding direction. At the same time, it can be easily folded.
[0011]
Claim 4 Agricultural implements listed are claims 1 Or 3 In the agricultural machine according to any one of the above, the folding machine includes a folding lock portion that double-locks another cover body in a folded state with respect to the one cover body.
[0012]
And in this structure, since the other cover body in the folding state can be double-locked with respect to one cover body by the folding lock part, it is ensured that the other cover body will be inadvertently unfolded. Can be prevented.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment of an agricultural machine according to the present invention will be described with reference to the drawings.
[0014]
1 to 4, reference numeral 1 denotes a foldable farm work machine. This farm work machine 1 is a towed center type drive harrow that is detachably mounted on a tractor (not shown) that is a towing vehicle. While moving in the traveling direction a by the tractor pulling operation, soil work such as scraping work and earthing work is performed.
[0015]
The farm machine 1 includes a machine body 2 that is elongated in the left-right horizontal direction, which is a direction that intersects the traveling direction A, and the machine body 2 has an intermediate 2 in the longitudinal direction so that the width dimension of the machine body 2 can be shortened as necessary. It can be folded at the location. 1 shows a non-working state in which the machine body 2 is supported by a stand 3 with casters, and FIG. 4 shows a work state in which the machine body 2 with the caster stand 3 removed is mounted on a tractor.
[0016]
The airframe 2 includes a main working portion 5 that is horizontally positioned at the center in the longitudinal direction of the airframe 2, and a pair of left and right extending operations that are foldable, that is, turnable on both the left and right sides of the main working portion 5. It is comprised by the sub work parts 6 and 6 which are parts.
[0017]
Each sub work unit 6 is within a predetermined rotation range (for example, 0 degrees to about 100 degrees) around a rotation shaft 8 in the substantially front-rear direction so that the outer end side opposite to the main work section 5 side moves up and down. Range), the folding state (non-working state) is the rising state by turning in the folding direction A, which is one direction, and the main work by turning in the folding release direction B, which is the other direction It will be in the unfolded state (working state) which is the horizontal state which followed the part 5 (refer FIG. 2).
[0018]
First, the main working part 5 will be described. As shown in FIGS. 1 to 3, the main working part 5 includes a three-point connecting part 11 as a tractor connecting part. The three-point connecting part 11 is a top pin. A top mast 13 to which 12 is attached, a pair of left and right to which a lower pin 14 is attached, and two lower arms 15 are formed. The three-point connecting portion 11 is detachably attached to a three-point link mechanism (three-point hitch portion) as a hydraulic support device for lifting and lowering the work implement provided at the rear portion of a tractor (not shown). The three-point link mechanism is composed of one top link, a pair of left and right two lower links, and the like.
[0019]
The main working unit 5 includes a mission case 17 that is an input shaft holding unit, and an input shaft 18 in a substantially front-rear direction is rotatably held by the mission case 17. The PTO shaft of the tractor is connected to the distal end portion of the input shaft 18 via a universal joint or the like. As shown in FIG. 5, a transmission mechanism 23 including bevel gears 19a and 19b, sprockets 20a and 20b, a chain 21 and the like is connected to the base end portion of the input shaft 18. Further, an upper end portion of the transmission case 24 is attached to the lower part of the transmission case 17, and a part of the transmission mechanism 23 is accommodated in the transmission case 24.
[0020]
Furthermore, the main working part 5 includes folding lock parts 25 and 25 which are a pair of left and right double locking devices that can double-lock the sub working part 6 in the folded state with respect to the main working part 5.
[0021]
Here, as shown in FIGS. 2, 3, 8, etc., each folding lock portion 25 has a mounting plate 31 erected on the upper surface of one cover body 71 to be described later. A pair of front and rear plate-like bases 29, 29 each having a substantially rectangular engagement recess 28 cut out at the upper edge portion are attached, and a rotating shaft 8 is bridged between these bases 29. Yes. Further, a protrusion 32 having a large tip is provided on the front surface of the front base 29, and the protrusion 32 is disposed in the vicinity of the engagement recess 28.
[0022]
Each folding lock portion 25 has an operation lever 30 that is an operation member having spring properties, and the operation lever 30 that can be elastically deformed is formed by bending a metal linear member at a plurality of locations, for example. The base end portion is attached to the attachment plate 31, and the grip portion 30a is formed at the distal end portion.
[0023]
Furthermore, each folding lock portion 25 has a pivot arm 27 that is pivotable in the vertical direction about a substantially longitudinal shaft portion 27a provided in the sub working portion 6. The pivot arm 27 is, for example, approximately It is formed in a U shape. Further, the rotating arm 27 is biased in a direction in which the tip end descends (counterclockwise in FIG. 8) by a torsion spring 33 fitted to the shaft portion.
[0024]
Furthermore, an engagement pin 26 that engages and disengages with respect to the engagement recess 28 is attached to the tip of the rotating arm 27, and a gripping portion 26a is formed at one end on the front side of the engagement pin 26. Yes.
[0025]
Then, when the worker rotates the sub working portion 6 around the rotation shaft 8 in switching from the unfolded state shown by the two-dot chain line in FIG. 8 to the folded state shown by the solid line in FIG. Accordingly, the engaging pin 26 of the rotating arm 27 moves along the upper edge of the base 29 toward the engaging recess 28 side. When the engagement pin 26 reaches the position of the engagement recess 28, the engagement pin 26 enters the engagement recess 28 and engages with the engagement recess 28. With the engagement between the engagement pin 26 and the engagement recess 28, the first-stage locking of the sub work portion 6 with respect to the main work portion 5 is completed.
[0026]
Thereafter, the operator grasps the grip portion 30a of the operation lever 30 and slightly deforms while pressing the lower surface side of the predetermined intermediate portion of the operation lever 30 against the engagement pin 26, so that the upper surface side of the predetermined intermediate portion of the operation lever 30 is The protrusion 32 is brought into contact with and engaged. As a result, the release of the engagement between the engagement pin 26 and the engagement recess 28 is prohibited by the operation lever 30, and the second-stage locking of the sub work part 6 to the main work part 5 is completed. .
[0027]
On the other hand, when the double lock by the folding lock unit 25 is released and the sub working unit 6 is brought into the unfolded state which is the working state, the operator releases the lock by the operation lever 30 and then turns it off. The grip portion 26a of the moving arm 27 is gripped, and the rotating arm 27 is rotated against the urging force of the torsion spring 33, and the engagement between the engagement pin 26 and the engagement recess 28 is released. Thereafter, the sub working unit 6 is rotated about the rotation shaft 8.
[0028]
On the other hand, the main working portion 5 includes a pair of left and right stand mounting portions 41, 41 formed in a cylindrical shape, and is constituted by a rectangular pipe elongated in the horizontal direction between the left and right pair of stand mounting portions 41, 41. The recumbent reeds 42 are bridged, and locking pins 43 in a substantially front-rear direction are attached to both ends of the reeds 42. Then, the engagement of the engaging portion 46 of the rotation operation member 45 provided in the sub working portion 6 and the locking pin 43 of the horizontal collar 42 causes the sub working portion 6 in the unfolded state, which is the working state, to be main. The working unit 5 is locked.
[0029]
On the other hand, as shown in FIG. 1, FIG. 5, etc., the main working unit 5 receives the driving force from the tractor side through the input shaft 18 and the transmission mechanism 23 and performs the rotation work by driving and rotating. A tilling work body 51 which is a rotary as a soil work body is provided.
[0030]
This one tilling work body 51 has an elongated shape having a longitudinal direction in the left-right horizontal direction which is a direction intersecting the traveling direction A, and a central portion in the longitudinal direction is attached to a lower end portion of the transmission case 24. Is supported in one point, that is, in a cantilever state. That is, one tilling work body 51 of the main working unit 5 is basically supported at one point by the transmission case 24.
[0031]
Here, as shown in FIG. 5, this one tilling work body 51 is, for example, one drive rotating shaft that is pivotally supported in one point by a bearing 24 a fixed to the lower end portion of the transmission case 24. It is composed of a tilling shaft 53 and a plurality of tilling claws 54 attached so as to protrude radially on the outer surface side of the one tilling shaft 53. In addition, each tilling claw 54 is attached at equal intervals from each other over substantially the whole of one tilling shaft 53 in the axial direction from one end side to the other end side.
[0032]
Further, as shown in FIGS. 6 and 7, one tilling shaft 53 has a left and right horizontal shaft body member 55 that is pivotally supported in one point by a bearing 24 a of the transmission case 24. At both ends in the axial direction of the member 55, one power transmission member 56, 56 having a truncated cone shape reduced in diameter toward the outer side, that is, the sub working portion 6 side, is coaxially attached. A central portion in the axial direction of the shaft main body member 55 is located in the transmission case 24, and a sprocket 20b of the transmission mechanism 23 is attached to a portion located in the transmission case 24.
[0033]
Each of the pair of left and right power transmission members 56 includes a disk-shaped large-diameter plate portion 57 and a small-diameter plate portion 58 that are spaced apart from each other in the axial direction of the shaft main body member 55. The peripheral edge portions of the small-diameter plate portion 58 are integrally connected by a truncated conical surface portion 59 whose center axis coincides with the rotation center axis X1 of the shaft body member 55.
[0034]
Then, on the outer peripheral surface of the truncated conical surface portion 59 on the virtual conical surface having the center axis coincident with the rotation center axis X1 of the shaft body member 55, the drive side friction as one of the inclined friction surfaces for power transmission is provided. A surface 60 is formed, and the drive-side friction surface 60 is located on the virtual conical surface in a continuous state in the circumferential direction. One power transmission member 56 forms one fitting portion 61.
[0035]
Further, a plurality of, for example, three, one power transmission tillage claw members 63, 63, 63 are radially attached to the large diameter plate portion 57 of the one power transmission member 56 in three different directions, such as bolts or the like. It is fixed with the fixture 64.
[0036]
As shown in FIGS. 6 and 7, each of the three power transmission tillage claws 63 has an elongated plate-shaped arm portion 65 positioned along the large-diameter plate portion 57. A plate-like claw portion 66 protruding toward the small-diameter plate portion 58 side with a predetermined obtuse angle is integrally formed at the tip portion protruding from the large-diameter plate portion 57, and the claw portion 66 is a truncated conical surface portion. Located outside of 59.
[0037]
As shown in FIG. 6, the plate-like claw portion 66 is not positioned along the plane including the rotation center axis X1 of the shaft main body member 55, and extends from the proximal end side to the distal end side of the shaft main body member 55. It is inclined with an acute inclination angle α with respect to the surface facing the rotation direction. Further, as shown in FIG. 7, the plate-like claw portion 66 has a tip portion located on an orthogonal line orthogonal to the rotation center axis X <b> 1 of the shaft body member 55. An engagement surface 69 as an engagement portion is formed on the surface of the plate-like claw portion 66 on the rotation direction side. That is, an inclined engaging surface 69 that is inclined at a predetermined inclination angle α with respect to the axial direction of one tilling shaft 53 is formed on the surface of the claw portion 66 on the rotational direction side.
[0038]
On the other hand, as shown in FIGS. 3, 5, etc., the main working unit 5 is located substantially above the one tilling work body 51 and covers the upper portion of the one tilling work body 51. The cover body 71 is provided, and this one cover body 71 is formed in an elongated substantially rectangular thin plate shape having a longitudinal direction in the left-right direction and in a slightly curved shape. As shown in FIG. 5, an integrated transmission case 17 and a transmission case 24 that transmit the driving force from the tractor are attached to the center of the airframe 2. The integrated transmission case 17 and transmission case 24 constitute a power transmission unit 70 that transmits the driving force from the tractor to one tilling work body 51 side.
[0039]
Then, the one cover body 71 has a function of a cover that prevents scattering of soil released upward from the one tilling work body 51 and a function of a frame that supports the one tilling work body 51 via the transmission case 24. I have. The one cover body 71 is formed, for example, in a thin plate shape with a metal material or the like, and has a predetermined strength capable of appropriately supporting the one tilling work body 51. Further, the three-point connecting portion 11, the folding lock portion 25, the stand attaching portion 41, and the like are attached to the one cover body 71.
[0040]
At the rear end portion of this one cover body 71, a front end portion of an elastic connecting body 72 such as a rubber plate as an elastically deformable connecting body having an elongated rectangular plate shape having a longitudinal direction in the left-right direction is attached. . A front end portion of one first leveling body 73 such as an elongated substantially rectangular plate-like flat plate having a longitudinal direction in the left-right direction is attached to the rear end portion of the elastic coupling body 72. At the rear end portion of the first first leveling body 73, the front end portion of one second leveling body 74 such as an elongated rectangular plate-like rake plate having a longitudinal direction in the left-right direction is a pin in the left-right direction, etc. It is attached so as to be rotatable through a rotation shaft 75.
[0041]
One leveling body 77 is constituted by one first leveling body 73, one second leveling body 74, etc., and this one leveling body 77 is cultivated by one tilling work body 51. At the time of cutting work for flattening the crushed soil, it rotates in the vertical direction around the front end side based on the deformation of the elastic coupling body 72 according to the state of the field, and slightly in the horizontal direction.
[0042]
Next, the pair of left and right sub-working units 6 and 6 will be described. The one side sub-working unit 6 on the left side in the traveling direction i and the other side sub-working unit 6 on the right side in the traveling direction i are configured symmetrically. Since the basic configuration is the same except for the differences, the sub-working unit 6 on one side will be mainly described. In addition, each structural member of the other side sub work part 6 attaches | subjects the same code | symbol as each structural member of the one side sub work part 6, and the description is abbreviate | omitted.
[0043]
As shown in FIG. 1, FIG. 5, etc., this one-side sub work section 6 can be folded with respect to one tilling work body 51 of the main work section 5, that is, can be turned around the turning shaft 8. A tilling work body 81 which is an extended rotary as another earth work body that rotates by receiving a driving force from one tilling work body 51 in a horizontal state that is not folded is provided.
[0044]
The other tilling work body 81 has an elongated shape having a longitudinal direction in the left-right horizontal direction that is a direction intersecting the traveling direction a, and both ends in the longitudinal direction are bearing on the lower ends of the pair of left and right side plate frames 82, 82. The two side plate frames 82 are attached in a two-point manner, that is, supported in a both-end supported state.
[0045]
Here, as shown in FIG. 5, the other tilling work body 81 is, for example, another driven rotating shaft that is pivotally supported in two points by a bearing 83 fixed to the lower end portion of each side plate frame 82. And a plurality of tilling claws 89 attached so as to protrude radially on the outer surface side of the other tilling shaft 88. Note that the respective tilling claws 89 are attached at equal intervals over substantially the whole of the other tilling shaft 88 from one end side in the axial direction to the other end side.
[0046]
Further, the other tillage shaft 88 has a shaft body member 90 in the horizontal direction horizontally supported in two points by bearings 83 of the side plate frames 82 as shown in FIGS. In the axial main body member 90, one side plate frame 82 projects from the one side plate frame 82 toward the main working portion 5 side. One end portion in the axial direction (the end portion on the side facing the one tillage shaft 53 when unfolded) has a main working portion. The other power transmission member 91 having a frustoconical shape whose diameter increases toward the side 5 and whose surface on the side of the main working portion 5 is an opening surface is coaxially attached.
[0047]
The other power transmission member 91 has a disk portion 92 having the same diameter as the small-diameter plate portion 58 of the one power transmission member 56, and the central axis is a shaft main body member 90 at the periphery of the disk portion 92. A frustoconical surface portion 93 coinciding with the rotation center axis X2 is integrally formed. Further, the inner peripheral surface side of the truncated conical surface portion 93 is formed by a rubber annular member 94 which is a friction increasing member.
[0048]
On the inner peripheral surface of the truncated conical surface portion 93, the other side of the inclined shape is arranged such that one tilling shaft 53 and the other tilling shaft 88 are coaxially positioned in pressure contact with the drive-side friction surface 60 in a planar and annular manner. A driven friction surface 95 as a power transmission friction surface is formed. The other power transmission member 91 is formed with the other fitting portion 96 that is fitted to and released from one fitting portion 61 according to the rotation of the other tillage shaft 88.
[0049]
Then, when the other tillage shaft 88 rotates in the direction toward the one tillage shaft 53, the one fitting portion 61 and the other fitting portion 96 are fitted to each other so that the driving side friction surface 60 and the driven side are fitted. The frictional surfaces 95 are in pressure contact with each other, and power can be transmitted by the frictional resistance between the driving friction surface 60 and the driven friction surface 95 that are in pressure contact with each other. The centripetal force is exerted by the guide action of the inclined tapered drive side friction surface 60 and driven side friction surface 95, and the rotation center axis X1 of one tillage shaft 53 and the rotation center axis X2 of the other tillage shaft 88 are Match.
[0050]
Furthermore, a plurality of, for example, three other power transmission tillage claws 98, 98, 98 are attached radially to the disc portion 92 of the other power transmission member 91 in three different directions, such as bolts. It is fixed with a fixture 99.
[0051]
As shown in FIGS. 6 and 7, the three other power transmission tillage claws 98 each have an elongated plate-shaped arm portion 100 positioned along the disc portion 92. A plate-like claw portion 101 that protrudes toward the main working portion 5 side with a predetermined obtuse angle is integrally formed at the tip portion that protrudes from the disc portion 92, and this claw portion 101 is formed outside the frustoconical surface portion 93. It is located in the direction.
[0052]
As shown in FIG. 6, the plate-like claw portion 101 is not positioned along a plane including the rotation center axis X2 of the shaft main body member 90, and the shaft main body member 90 is moved from the proximal end side toward the distal end side. It is inclined with an acute inclination angle α (the same inclination angle as that of the claw portion 66 of one power transmission member 56) with respect to the surface facing the rotation direction. Further, as shown in FIG. 7, the plate-like claw portion 101 has a tip portion located on an orthogonal line orthogonal to the rotation center axis X <b> 2 of the shaft body member 90. An engaged surface 103 as an engaged portion that can be engaged and disengaged with respect to the engaging surface 69 is formed on the surface of the plate-like claw portion 101 opposite to the rotation direction. That is, an inclined engaged surface 103 that is inclined with a predetermined inclination angle α with respect to the axial direction of the other tillage shaft 88 is formed on the surface of the claw portion 101 on the side opposite to the rotation direction. Further, an earth-pressing surface 104 is formed on the surface of the plate-like claw portion 101 on the rotation direction side.
[0053]
When one drive shaft 53 is slightly rotated relative to the other tillage shaft 88 at the time of pressure contact between the drive side friction surface 60 and the driven side friction surface 95, the engagement surface 69 of the one tillage shaft 53 and the other The engaged surface 103 of the tillage shaft 88 is in contact with and engaged with each other in a planar shape, and the rotation of one tillage shaft 53 is caused by the engagement between the engaging surface 69 and the engaged surface 103. As a result, the other tillage shaft 88 rotates integrally with one tillage shaft 53.
[0054]
Further, due to the engagement between the engagement surface 69 of one tillage shaft 53 and the engaged surface 103 of the other tillage shaft 88, the one tillage shaft 53 and the other tillage shaft 88 move slightly in a direction approaching each other. As a result, the contact pressure between the driving friction surface 60 and the driven friction surface 95 increases.
[0055]
On the other hand, as shown in FIGS. 3, 5, etc., the one side sub working unit 6 is positioned substantially above the other tillage work body 81 and covers the upper side of the other tillage work body 81. The other cover body 111 is provided.
[0056]
The other cover body 111 includes a cover main body part 111a having an elongated, substantially rectangular thin plate shape having a longitudinal direction in the left-right direction and a slightly curved shape, and downwards at both ends in the longitudinal direction of the cover main body part. It is formed by side surfaces 111b and 111b having a substantially thin plate shape so as to protrude. The side surface portion 111b is constituted by a side plate frame 82.
[0057]
Further, the other cover body 111 can be folded with respect to one cover body 71 of the main working unit 5, that is, can rotate around the rotation shaft 8. In other words, the other cover body 111 is rotatable about the rotation shaft 8 of the connecting portion 8a such as the first hinge that connects the one cover body 71 and the other cover body 111.
[0058]
Further, a folding handle 114 as a reinforcing member for reinforcing the substantially thin plate-like side plate frame 82 is attached to the outer side plate frame 82 which is one side of the other cover body 111. The folding handle 114 is formed of, for example, a metal elongated pipe bent at two places in the middle in the longitudinal direction, and a grip 113 is formed on one end side. Further, as shown in FIG. 4, the folding handle 114 is fixed along the lower edge portion of the outer surface of the side plate frame 82, and the gripping portion 113 projects forward. The folding handle 114 also has a function of preventing the side plate frame 82 from being tangled.
[0059]
The other cover body 111 has a function of a cover that prevents scattering of soil discharged upward and laterally from the other tillage work body 81 and a function of a frame that supports the other tillage work body 51. . The other cover body 111 is formed in a substantially U-shaped thin plate shape, for example, with a metal material or the like, and has a predetermined strength capable of appropriately supporting the other tillage work body 81.
[0060]
Further, at the rear end portion of the other cover body 111, the front end portion of the other first leveling body 116 such as an elongated flat plate having an elongated rectangular plate shape having a longitudinal direction in the left-right direction is provided with a pin in the left-right direction, etc. It is attached so as to be rotatable through a rotation shaft 118. The pair of left and right rotating shafts 118 slide in a long hole 119 formed in the side plate frame 82 and in a long hole (not shown) formed in the attachment plate 120 of the other cover body 111, respectively. It is freely movably fitted.
[0061]
Further, at the rear end portion of the other first leveling body 116, the front end portion of another second leveling body 117 such as an elongated rake plate having an elongated rectangular plate shape having a longitudinal direction in the left-right direction is provided in the left-right direction. It is attached to be rotatable via a rotation shaft 121 such as a pin.
[0062]
The other first leveling body 116, the other second leveling body 117, and the like constitute another leveling body 123. The other leveling body 123 is plowed by the other tillage work body 81. At the time of the scraping work for flattening the crushed soil, it rotates up and down together with one leveling body 77 according to the state of the field, and slightly rotates left and right.
[0063]
The other first leveling body 116 rotates around the rotation shaft 8 of the connecting portion 8b such as a second hinge that connects the first first leveling body 73 and the other first leveling body 116. It is possible to move. The other second leveling body 117 can rotate around the rotation axis 8 of the connecting portion 8c such as a third hinge that connects one second leveling body 74 and the other second leveling body 117. It has become. The other leveling bodies 123 can be folded with respect to the one leveling body 77.
[0064]
As shown in FIG. 4, the main working unit 5 includes working state switching means 130 composed of an operating lever body 125, a connecting link 126, a rotating arm 127, a connecting rod 128, and the like. By operating the control lever body 125 of the state switching means 130, one leveling body 77 and a pair of left and right leveling bodies 123, 123 are scraped together. Condition and Earthing work Status Can be switched to.
[0065]
Further, an urging body 131 such as a gas spring is provided between one cover body 71 of the main working section 5 and the other cover body 111 of each sub working section 6. And this urging body 131 urges the other cover body 111 in the folding direction A, that is, urges the other cover body 111 so that the outer end of the other cover body 111 is lifted, The rotating operation of the other cover body 111 and the tilling work body 81 of each sub work unit 6, that is, the folding operation of the machine body 2 can be easily performed manually.
[0066]
One power transmission member 56 and the other power transmission member 91 constitute a conical clutch 133, and one power transmission tillage claw member 63 and the other power transmission tillage claw member 98 constitute a claw clutch 134. The conical clutch 133 and the pawl clutch 134 constitute a composite clutch portion 135. Further, the power transmission device 136 is configured by one tilling shaft 53, another tilling shaft 88, the composite clutch portion 135, and the like. As shown in FIG. 5, the pair of left and right composite clutch portions 135 is disposed at a position corresponding to the wheel C of the tractor, that is, at a rear position of the wheel C.
[0067]
Further, the power transmission unit 70, the one cover body 71, the other cover body 111, the folding handle 114, and the like constitute the tilling cover means 140 that also serves as a frame function. Further, a tilling work means 141 is constituted by one tilling work body 51 in the center of the machine body 2 and other tilling work bodies 81 and 81 on both the left and right sides. The tillage work means 141 is supported by the tillage cover means 140 so that the upper part is covered, and is capable of performing the tillage work based on the driving force from the power transmission unit 70.
[0068]
Next, the operation of the above embodiment will be described.
[0069]
In releasing the folding of the machine body 2, the operator releases the double lock of the folding lock portion 25, and then holds the holding portion 113 of the folding handle 114 of the side plate frame 82 to release the folding of the sub working portion 6. When a predetermined amount is rotated in the direction B, the other tilling shaft 88 of the sub working unit 6 is rotated in a direction toward one tilling shaft 53 of the main working unit 5, and the driven side friction surface of the other working shaft 88 is rotated. 95 and the drive-side friction surface 60 of the one tillage shaft 53 are in pressure contact with each other with a contact pressure capable of being transmitted.
[0070]
That is, one power transmission member 56 of one tillage shaft 53 enters the other concave power transmission member 91 of the other tillage shaft 88, and the other tillage shaft 88 is coaxial with the one tillage shaft 53. When one of the power transmission members 56 is located, the other power transmission member 91 is fitted and held. As a result, one tilling shaft 53 of one tilling work body 51 supported by the transmission case 24 is supported by the other pair of left and right tilling shafts 88 and 88 in an auxiliary manner.
[0071]
During the unfolding operation of the airframe 2, the centripetal force caused by the contact between the driving side friction surface 60 and the driven side friction surface 95 acts on one tilling shaft 53 and the other tilling shaft 88. The rotation center axis X1 of the tillage shaft 53 coincides with the rotation center axis X2 of the other tillage shaft 88.
[0072]
When the driving friction surface 60 and the driven friction surface 95 are pressed against each other, the driving force from the tractor side is transmitted to one tilling shaft 53 via the input shaft 18 and the transmission mechanism 23. Is rotated in a predetermined direction, the rotation of the one tillage shaft 53 is transmitted to the other tillage shaft 88 via the driving friction surface 60 and the driven friction surface 95 which are in pressure contact with each other. That is, the driving force from one tillage shaft 53 is transmitted to the other tillage shaft 88 by the conical clutch 133. It should be noted that no noise such as an impact sound is generated when power transmission by the conical clutch 133 is started.
[0073]
Then, due to the power transmission by the conical clutch 133, the other tillage shaft 88 rotates integrally with the one tillage shaft 53 around the rotation center axis X2 that coincides with the rotation center axis X1 of this one tillage shaft 53. To do. Then, by rotating the three tilling shafts 53, 88, 88, the soil in the field is tilled by the tilling claws 54, 89, and is flattened by the three leveling bodies 77, 123, 123.
[0074]
Here, in a state where the driving side friction surface 60 and the driven side friction surface 95 of the conical clutch 133 are in pressure contact, and the engagement surface 69 of the claw clutch 134 and the engaged surface 103 are not engaged. If the load on other tillage work bodies 81 of the sub work section 6 increases during soil work, the driving friction surface 60 rotates while sliding on the driven friction surface 95 gradually, The mating surfaces 69 are engaged so as to be caught on the engaged surfaces 103.
[0075]
The engagement between the engagement surface 69 and the engaged surface 103 is not accompanied by an impact, and noise such as an impact sound is not generated. Further, due to the engagement between the engaging surface 69 and the engaged surface 103, the one tilling shaft 53 and the other tilling shaft 88 move slightly in the direction approaching each other along the axial direction, and the driving side friction surface 60 The contact pressure between the engagement surface 69 and the driven surface 103 is increased as compared with the engagement release state between the engagement surface 69 and the engaged surface 103.
[0076]
When the engagement surface 69 and the engaged surface 103 are engaged, the rotation of one tillage shaft 53 is engaged with the driving friction surface 60 and the driven friction surface 95 that are in pressure contact with each other. It is transmitted to the other tillage shaft 88 via the surface 69 and the engaged surface 103. That is, the driving force from one tillage shaft 53 is transmitted to the other tillage shaft 88 by both the conical clutch 133 and the pawl clutch 134.
[0077]
Then, by the combined power transmission by the conical clutch 133 and the pawl clutch 134, the other tillage shaft 88 is integrated with the one tillage shaft 53 and coincides with the rotation center axis X1 of the one tillage shaft 53. Rotate around X2. Then, by rotating the three tilling shafts 53, 88, 88, the soil in the field is tilled by the tilling claws 54, 89, and is flattened by the three leveling bodies 77, 123, 123. As described above, power transmission with a small load is performed only by the conical clutch 133, but power transmission with a large load is performed by the conical clutch 133 and the pawl clutch 134.
[0078]
According to the above-described embodiment, since one tilling shaft 53 of one tilling work body 51 of the main working unit 5 is pivotally supported by the transmission case 24 in a single point, the conventional structure always includes The required pair of left and right side plate frames and bearings for the tilling shaft 53 that are necessary are no longer required, the number of parts can be reduced, and the configuration can be simplified, thereby reducing the weight and cost.
[0079]
In addition, since a pair of left and right side plate frames and bearings for one tilling shaft 53 can be made unnecessary, it is possible to reduce the number of remaining grooves formed in the field scene as compared with the conventional configuration.
[0080]
Further, one tilling shaft 53 of one main working unit 5 is pivotally supported by the transmission case 24, and the other working shaft 81 of the other working unit 6 on both sides is supported by another tilling shaft 88. Therefore, one tilling shaft 53 can be reliably supported, and soil work such as stable cutting work can be performed.
[0081]
In addition, since the configuration includes the composite clutch portion 135 composed of the conical clutch 133 and the pawl clutch 134, the configuration can be simplified and the weight can be reduced. It can be reliably prevented from generating noise during power transmission, and driven from one tiller shaft 53 on the driving side regardless of the load from the field on the other tilling shaft 88 on the driven side. Power can be reliably transmitted to the other tillage shaft 88 on the side.
[0082]
Furthermore, it is not necessary to align the phase between one tilling shaft 53 on the driving side and the other tilling shaft 88 on the driven side, so that the composite clutch portion 135 can be turned on and off smoothly and easily.
[0083]
Further, the centripetal force due to the guide action of the driving side friction surface 60 and the driven side friction surface 95 can eliminate the deviation of the rotation center axes X1 and X2 of the tilling shafts 53 and 88, and the nail based on the deviation of the rotation center axes X1 and X2 Wear of the clutch 134, noise, etc. can be prevented appropriately.
[0084]
Furthermore, since the pawl clutch 134 of the composite clutch part 135 performs power transmission and at the same time performs the tilling and crushing work, it is possible to prevent a remaining groove in the connecting portion between one tilling shaft and another tilling shaft. Further, since the composite clutch portion 135 performs tilling and crushing work at the rear position of the wheel C of the tractor, it is possible to reduce the load from the soil applied to the composite clutch portion 135 at the time of this work. The composite clutch part 135 has a long life.
[0085]
Further, one power transmission member 56 having a truncated cone shape with a diameter reduced toward the sub working section 6 is attached to one tilling shaft 53, and the other working shaft 88 is directed to the main working section 5 side. Since the other power transmission member 91 having a truncated conical shape with a larger diameter is attached, the other power transmission member 91 is attached to one tillage shaft 53 and the other power transmission member 56 is attached to the other tillage shaft 88. Compared to the configuration in which is attached, soil adhesion to one tilling shaft 53 can be reduced, and cleaning work and the like can be facilitated.
[0086]
Further, the tilling cover means 140 having one cover body 71, another cover body 111 and the like has a frame function, and the tilling work means 141 is supported by the tillage cover means 140 so as to cover the upper side. The main pipe frame having a thick cylindrical shape, which is conventionally required, is not required, the weight can be reduced, the configuration is simple, the assembling work can be facilitated, and the manufacturing cost can be reduced.
[0087]
In the above embodiment, the airframe 2 has been described as a structure that can be folded at two positions in the middle in the longitudinal direction so that the width of the airframe 2 can be shortened as necessary. A structure that can be folded at one position or a structure that can be folded at three or more positions may be used. The airframe 2 may be configured to be foldable until it completely overlaps or may be foldable within a predetermined range without overlapping.
[0088]
Further, the airframe 2 may not be foldable and may not be folded. For example, the tillage cover means 140 is constituted by a cover body that is substantially in the form of a single thin plate, and the tillage work means 141 is one. A plowing work body 51 may be used.
[0089]
Further, in addition to one tilling shaft 53 of one tilling work body 51 of the main working section 5, other tilling shafts 88 of the other working work body 81 are supported in a one-point cantilever state. It is good also as the structure which carried out.
[0090]
Further, in any of the above-described embodiments, it has been described that the drive rotation shaft is one tilling shaft 53 and the driven rotation shaft is another tilling shaft 88. The present invention can also be applied to a drive rotation shaft, a driven rotation shaft, and the like provided in a foldable machine body provided with two drive-type tilling work bodies.
[0091]
In addition, although the drive-side friction surface 60 and the driven-side friction surface 95 have been described as being configured to be continuous in the circumferential direction on the virtual conical surface, for example, although not illustrated, the driving-side friction surface 60 and the driven-side friction surface 95 are intermittent in the circumferential direction on the virtual conical surface. The structure located in the state may be sufficient.
[0092]
Furthermore, the other power transmission member 91 may be attached to one tillage shaft 53 and the other power transmission member 56 may be attached to the other tillage shaft 88.
[0093]
In addition, supporting a tilling work body such as one tilling work body 51 that is a soil work body in one point means that the tilling work body is supported by one support or the tilling work body is supported at one place. However, it is not limited to one-point support in a strict sense, and includes, for example, a case where a plurality of, for example, two bearings 24a provided in one transmission case 24 are used for axial support.
[0094]
【The invention's effect】
Contract Claim 1 According to the described invention, the substantially plate-shaped one cover body of the cultivation cover means has a function of a cover for preventing scattering of soil discharged from one cultivation work body and a frame that supports the one cultivation work body. The function of the cover that prevents the scattering of the soil discharged from the other tillage work body and the function of the frame that supports the other tillage work body to the other cover body having a function and having a substantially plate shape of the tillage cover means Therefore, a thick cylindrical main pipe frame is not required, the weight can be reduced, the configuration is simple, the assembly work can be facilitated, and the manufacturing cost can be reduced.
[0095]
Claim 2 According to the described invention, the other cover body can be reinforced with the folding handle, and the other cover body can be folded together with the other tillage work body more easily using the folding handle.
[0096]
Claim 3 According to the described invention, the urging body is located between one cover body and the other cover body and urges the other cover body in the folding direction. Can be easily folded with the body.
[0097]
Claim 4 According to the described invention, since the other cover body in the folded state can be double-locked with respect to the one cover body by the folding lock portion, the other cover body is inadvertently unfolded. It can be surely prevented.
[Brief description of the drawings]
FIG. 1 is a side view of an embodiment of an agricultural machine according to the present invention.
FIG. 2 is a front view of the agricultural machine.
FIG. 3 is a plan view of the agricultural machine.
FIG. 4 is a side view when the agricultural working machine is operated.
FIG. 5 is a front view in which a part of the agricultural working machine is omitted.
FIG. 6 is a front view of a connecting portion of a tillage shaft of the agricultural working machine.
FIG. 7 is a side view of the connecting portion of the tillage shaft.
FIG. 8 is a view showing a folding lock portion of the agricultural working machine.
[Explanation of symbols]
1 Agricultural machine
25 Folding lock
51 One tilling work
70 Power transmission part
71 One cover body
81 Other tillage work bodies
111 Other covers
114 Folding handle
131 Energizing body
140 Tillage cover means
141 Tillage work means

Claims (4)

動力伝達部を有する耕耘カバー手段と、
前記動力伝達部からの駆動力で回転して耕耘作業をする一の耕耘作業体と、
この一の耕耘作業体に対して折り畳み可能とされ、非折り畳み時に前記一の耕耘作業体からの駆動力で回転して耕耘作業をする他の耕耘作業体と、
前記一の耕耘作業体にて耕耘砕土された土を平らにする一の整地体と、
前記他の耕耘作業体にて耕耘砕土された土を平らにする他の整地体と、
操作レバー体の操作により前記一の整地体と前記他の整地体とを一斉に代掻作業状態および土引き作業状態に切り換える作業状態切換え手段とを備え、
前記耕耘カバー手段は、
前記一の耕耘作業体から放出される土の飛散を防止するカバーの機能および前記一の耕耘作業体を支持するフレームの機能をもった略板状の一のカバー体と、
この一のカバー体に対して折り畳み可能とされ、前記他の耕耘作業体から放出される土の飛散を防止するカバーの機能および前記他の耕耘作業体を支持するフレームの機能をもった略板状の他のカバー体と、
この他のカバー体の外側の側板フレームの補強を兼ねた折り畳み用ハンドルとを有し、
前記折り畳み用ハンドルは前記側板フレームの外面下縁部に沿って固着され、この折り畳み用ハンドルの把持部が前方に向って突出している
ことを特徴とする農作業機。
Tillage cover means having a power transmission part;
One tilling work body that rotates by the driving force from the power transmission unit and performs the tilling work,
Other cultivating work bodies that are foldable with respect to the one cultivating work body and rotate by the driving force from the one cultivating work body when not folded,
One leveling body for flattening the soil cultivated by the one cultivation work body;
Other leveling bodies that flatten the soil cultivated by the other tillage work body,
Working state switching means for switching the one leveling body and the other leveling body simultaneously to the scraping work state and the earthing work state by operating the operation lever body,
The tillage cover means includes
A substantially plate-like one cover body having a function of a cover for preventing scattering of soil discharged from the one tilling work body and a function of a frame for supporting the one tilling work body;
A substantially plate having a function of a cover which is foldable with respect to the one cover body and prevents scattering of soil discharged from the other tillage work body and a function of a frame which supports the other tillage work body. With other cover body in shape ,
A folding handle that also serves as a reinforcement for the side plate frame outside the other cover body,
The agricultural machine according to claim 1, wherein the folding handle is fixed along an outer surface lower edge portion of the side plate frame, and a grip portion of the folding handle protrudes forward .
り畳み用ハンドルは、一端側に把持部を有する細長パイプにて形成されている
ことを特徴とする請求項1記載の農作業機。
In fold folding handle it is agricultural machine according to claim 1, characterized in that it is formed by an elongated pipe having a grip portion at one end.
一のカバー体と他のカバー体との間に位置してこの他のカバー体を折り畳み方向に付勢する付勢体を備えている
ことを特徴とする請求項1または2記載の農作業機。
The agricultural working machine according to claim 1 or 2, further comprising a biasing body that is positioned between the one cover body and the other cover body and biases the other cover body in the folding direction.
折り畳み状態にある他のカバー体を一のカバー体に対して2重にロックする折り畳みロック部を備えている
ことを特徴とする請求項1ないし3のいずれかに記載の農作業機。
The agricultural working machine according to any one of claims 1 to 3, further comprising a folding lock portion that double-locks the other cover body in a folded state with respect to the one cover body.
JP2001031490A 2001-02-07 2001-02-07 Agricultural machine Expired - Lifetime JP3668431B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001031490A JP3668431B2 (en) 2001-02-07 2001-02-07 Agricultural machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001031490A JP3668431B2 (en) 2001-02-07 2001-02-07 Agricultural machine

Publications (2)

Publication Number Publication Date
JP2002233207A JP2002233207A (en) 2002-08-20
JP3668431B2 true JP3668431B2 (en) 2005-07-06

Family

ID=18895567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001031490A Expired - Lifetime JP3668431B2 (en) 2001-02-07 2001-02-07 Agricultural machine

Country Status (1)

Country Link
JP (1) JP3668431B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4422601B2 (en) * 2004-12-15 2010-02-24 松山株式会社 Positioning device and foldable agricultural machine
JP4928803B2 (en) * 2006-02-27 2012-05-09 小橋工業株式会社 Tillage work machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4983209U (en) * 1972-11-14 1974-07-18
JPS50111206U (en) * 1974-02-25 1975-09-10
JPS6350508U (en) * 1986-09-19 1988-04-05
JP3199347B2 (en) * 1995-01-31 2001-08-20 小橋工業株式会社 Folding farm work machine
JP3037893B2 (en) * 1996-04-15 2000-05-08 三菱農機株式会社 Agricultural tractor hitch device
JP3872208B2 (en) * 1998-05-21 2007-01-24 小橋工業株式会社 Farm machine folding device

Also Published As

Publication number Publication date
JP2002233207A (en) 2002-08-20

Similar Documents

Publication Publication Date Title
JP2001346406A (en) Agricultural working machine
JP3668431B2 (en) Agricultural machine
JP3686638B2 (en) Agricultural machine
JP3581832B2 (en) Farm work machine
JP3607871B2 (en) Power transmission device and agricultural machine
JP3628950B2 (en) 畦 coating machine
JP4396798B2 (en) 畦 coating machine
JP3581833B2 (en) Power transmission device and agricultural work machine
JP2002233209A (en) Agricultural working machine
JP2002315402A (en) Agricultural machine
JP2004121125A (en) Sulky rice transplanter
JPH0642411Y2 (en) Work equipment coupling device
JP3610968B2 (en) Passenger management work vehicle
JP5094160B2 (en) Agricultural machine
JP5054415B2 (en) Crusher with a power take-off section
JP4866289B2 (en) Agricultural machine
JP2023006392A (en) work vehicle
JP4701527B2 (en) Tractor work equipment coupling device
JP4324087B2 (en) Agricultural machine
JPH0528976Y2 (en)
JP4160212B2 (en) Mounting structure of grass cutting tillage nail in grass cutting tillage device
JPH09233907A (en) Farm working machine
JP2004215638A (en) Furrow-forming machine
JPS631B2 (en)
JPS5930641Y2 (en) External transmission disconnection device for power take-off device in rotary equipment

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040531

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20040609

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040804

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20041020

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20041214

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20050316

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20050408

R150 Certificate of patent or registration of utility model

Ref document number: 3668431

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090415

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20090415

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100415

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100415

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110415

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120415

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120415

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130415

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140415

Year of fee payment: 9

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term