JP3747029B2 - Walking type agricultural machine - Google Patents

Walking type agricultural machine Download PDF

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Publication number
JP3747029B2
JP3747029B2 JP2002381361A JP2002381361A JP3747029B2 JP 3747029 B2 JP3747029 B2 JP 3747029B2 JP 2002381361 A JP2002381361 A JP 2002381361A JP 2002381361 A JP2002381361 A JP 2002381361A JP 3747029 B2 JP3747029 B2 JP 3747029B2
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machine
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work
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JP2002381361A
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JP2004208578A (en
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信男 山崎
博徳 西江
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2002381361A priority Critical patent/JP3747029B2/en
Priority to US10/702,537 priority patent/US6854526B2/en
Priority to FR0315453A priority patent/FR2849347B1/en
Priority to CN200310124230.0A priority patent/CN1262165C/en
Priority to CNU200320113723XU priority patent/CN2686285Y/en
Publication of JP2004208578A publication Critical patent/JP2004208578A/en
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【0001】
【発明の属する技術分野】
本発明は、畝立て機等の作業装置を牽引する歩行型農作業機に関する。
【0002】
【従来の技術】
歩行型農作業機として、後部に牽引する牽引作業機の位置を規制するガイドアームを設けたもの(例えば、特許文献1参照。)、後方に昇降自在に各種副作業装置を連結するための昇降機構を設けたものが知られている(例えば、特許文献2参照。)。
【0003】
【特許文献1】
特開2001−238504公報(第3−4頁、図1、図3)
【特許文献2】
特開平10−225205号公報(第3−7頁、図1、図12)
【0004】
特許文献1の図1を以下の図15で、特許文献1の図3を以下の図16で説明する。なお、符号は振り直した。
図15は従来の歩行型農作業機の後部及び牽引作業機を示す要部側面図(従来例1)であり、歩行型農作業機としての耕耘機に設けた伝動ケース201の後部に枠板202を取付け、この枠板202に牽引バー203を介して牽引作業機である畝立て器204を連結し、枠板202にガイドアーム205を上下スイング可能に取付け、このガイドアーム205に上方規制部206を形成し、この上方規制部206で牽引バー203に設けたピン軸207の位置を規制したことを示す。
【0005】
図16は従来の歩行型農作業機の牽引作業状態を示す側面図(従来例1)であり、駆動輪211で走行しながら耕耘爪212で硬い土壌213を耕耘土壌214にし、畝立て器204で畝を形成することを示す。
【0006】
特許文献2の図1を以下の図17で、特許文献2の図12を以下の図18で説明する。なお、符号は振り直した。
図17は従来の歩行型農作業機の側面図(従来例2)であり、歩行型農作業機221の後部に昇降機構を介して各種副作業装置としての播種装置222を昇降自在に連結したことを示す。なお、224はロータリ爪225を備えたロータリ装置、226は車軸227に取付けた走行車輪である。
【0007】
図18は従来の歩行型農作業機の昇降機構の側面図(従来例2)であり、ミッションケースの後部に変速ガイド体231を取付け、この変速ガイド体231に昇降機構232を取付けた状態を示す。
【0008】
昇降機構232は、変速ガイド体231に取付けたリンク支持体234と、このリンク支持体234に一端を上下スイング可能に取付けた上側リンク235及び下側リンク236と、これらの上側リンク235及び下側リンク236のそれぞれの他端にスイング可能に取付けた本体側ヒッチ237とからなり、本体側ヒッチ237に播種装置を取付ける。
【0009】
【発明が解決しようとする課題】
図15において、ガイドアーム205に形成した上方規制部206で牽引バー203のピン軸207の位置を規制すると、図16において、畝立て器204に対して駆動輪211が下方へ移動できなくなるため、作業開始前に畝立て器204の下面が土壌に接地した状態では、駆動輪211が土壌から浮いた状態になり、駆動輪211による駆動力が得られない。そこで、オペレータが、例えば、耕耘機のハンドルを押し下げて駆動輪211を無理やりに接地させると、駆動力を得られ、図16に示したような作業が可能になる。しかし、これでは、オペレータの負担が大きくなる。
【0010】
また、図17に示されるように、作業を行うために昇降機構232によって播種装置222を下降させた状態では、図18に示されるように、上側リンク235及び下側リンク236は後下がりに傾斜する。この状態で、歩行型農作業機221を前進させると、図18において、上側リンク235及び下側リンク236の長手方向に沿って前上がりの牽引力T1が発生する。従って、図17及び図18において、歩行型農作業機221が播種装置222を牽引中は牽引力T1の鉛直上向きの分力T2によって播種装置222を必要な高さ位置に維持することが難しくなる。
【0011】
そこで、本発明の目的は、歩行型農作業機を改良することで、作業装置の必要な高さ位置、例えば畝立て機における土壌への沈み込み深さを維持することで安定した作業深さを容易に得ることができるようにし、オペレータの作業負担を軽減することにある。
【0012】
【課題を解決するための手段】
上記目的を達成するために請求項1は、機体の後部に走行車輪用の車軸を設け、この車軸の前方に耕耘装置を取付け、車軸の後方であって機体の後部に畝立て機等の作業装置を連結機構を介して連結可能とした歩行型農作業機において、連結機構に関しては、機体の後部側にアッパリンクとロアリンクとのそれぞれの一端をスイング自在に取付け、それぞれの他端を作業装置側にスイング自在に取付け、機体に連結した作業装置と走行車輪とを作業開始前に土壌に接地させた状態では、アッパリンク及びロアリンクの作業装置側の端部を機体側の端部よりも高位置に配置したことで、作業装置を牽引中は、アッパリンク及びロアリンクを上下にスイング可能な状態として、アッパリンク及びロアリンクに前斜め下向きの牽引力を発生させ、この牽引力の鉛直下向きの分力によって作業装置を土壌中に沈み込ませることを特徴とする。
【0013】
土壌に接地させた作業装置を牽引して作業を開始したときに、作業装置側の端部を機体側の端部よりも高位置に配置したアッパリンク及びロアリンクによって、アッパリンク及びロアリンクに前下がりの向きの牽引力を発生させることができ、この牽引力の鉛直下向きの分力で作業装置を土壌中に沈み込ませることができる。また、作業装置が土壌中に沈み込んでアッパリンク及びロアリンクがほぼ水平な状態になれば、作業装置には鉛直下向きの分力が作用しなくなるため、作業装置の沈み込み深さを維持することができる。
【0014】
従って、歩行型農作業機のオペレータが作業装置を沈み込ませるために、例えばハンドルを下方に押し付けたり押し付け力を経験や勘によって調整する必要がなく、作業装置による作業を容易に行うことができるとともに、オペレータの作業負担を軽減することができ、更には、作業装置の沈み込み位置を維持することができて、安定した作業深さを得ることができる。
【0015】
【発明の実施の形態】
本発明の実施の形態を添付図に基づいて以下に説明する。なお、図面は符号の向きに見るものとする。
図1は本発明に係る歩行型農作業機の斜視図であり、歩行型農作業機10(以下では単に「農作業機10」と記す。)は、エンジン11から機体としての動力伝達装置12を介して左右の走行車輪13,14(手前側の符号13のみ示す。)及びこれらの走行車輪13,14の前方に配置した左右の耕耘装置15、16へ動力を伝達し、動力伝達装置12の後部に畝立て機等の作業装置を連結する構造を有する農業機械であり、耕耘装置15,16で圃場を耕しながら、例えば畝立て機で畝を立てる。
【0016】
図2は本発明に係る農作業機の側面図であり、農作業機10は、機体の上部に配置したエンジン11と、このエンジン11の下部にクラッチ(不図示。17はクラッチを収納するクラッチケースである。)を介して取付けた動力伝達装置12と、この動力伝達装置12の前部に左右の耕耘軸15a,16a(手前側の符号15aのみ示す。)を介して回転可能に取付けた耕耘装置15,16と、動力伝達装置12の後部に左車軸13a及び右車軸14a(不図示)を介して回転可能に取付けた走行車輪13,14と、動力伝達装置12の後部から後方斜め上方に延ばしたハンドル18と、動力伝達装置12の後端に取付けた連結機構21とからなる。
【0017】
ここで、31は動力伝達装置12の前端部に上下に位置調整可能に取付けた走行補助輪、32は動力伝達装置12及び耕耘装置15,16の上方を覆うフェンダ、33はエンジン11の上方を覆うエンジンカバー、34はエアクリーナ、35は燃料タンク給油口用キャップ、36は変速レバー、37はデフロック用レバー、38はクラッチレバー、41は連結機構21に連結した作業装置を跳ね上げるための跳ね上げレバー、42は連結機構21に連結した作業装置の沈み込み位置を調整する沈み込み位置調整レバーである。
【0018】
図3は本発明に係る農作業機の平面図であり、農作業機10は、ハンドル18の右側前部に、エンジン11を始動させるリコイルスタータ用ノブ51と、エンジン11の出力を調整するスロットルレバー52と、前述のデフロック用レバー37とを配置し、ハンドル18の左側後部にエンジン11を停止させるエンジンスイッチ53を取付け、ハンドル18の後部にクラッチレバー38を取付け、動力伝達装置12(図1参照)の後部中央から後方へ変速レバー36を延ばし、連結機構21の後部左部から後方へ跳ね上げレバー41を延ばしたことを示す。
【0019】
図4は本発明に係る連結機構の側面図であり、連結機構21は、動力伝達装置12(図1参照)の後端にボルト61,61及びナット62,62で取付ける左右のベースプレート63,63(手前側の符号63のみ示す。)と、これらのベースプレート63,63間に配置するとともにベースプレート63,63に支軸64を介してスイング可能に取付けたベースアーム66と、このベースアーム66に上下スイング可能に取付けたアッパリンク67及びロアリンク68と、これらのアッパリンク67及びロアリンク68にスイング可能に取付けた連結部材71と、ベースアーム66の先端に支軸72を介してスイング可能に取付けた跳ね上げレバー73と、アッパリンク67の中間部に取付けた側方延出ピン74を上下移動させることでアッパリンク67及びロアリンク68及び連結部材71を介して連結部材71に連結する作業装置の土壌中の沈み込み位置を調整する沈み込み位置調整機構76とからなる。
上記したアッパリンク67及びロアリンク68は連結リンク78を構成する部材である。
【0020】
ベースプレート63は、ほぼ中央に、側方延出ピン74をベースプレート63,63間から外部に突出させる第1窓部81を開け、上部に、係止ピン82を掛けるための上部切欠き部83〜85を設けた第2窓部87を開け、下部に、跳ね上げレバー73の先端に設けた側方突出ピン88を掛ける下部切欠き部91,92を形成した部材である。
【0021】
ベースアーム66は、支軸64を中心にして上方へスイングするときに、引張コイルばね94で引張力を作用させるようにした部材である。
引張コイルばね94は、ベースプレート63に設けたばね支持ピン95に一端を掛け、他端をベースアーム66に開けたばね掛け穴66aに掛けた部材である。この引張コイルばね94によって跳ね上げレバー73の操作力を軽減する。
【0022】
アッパリンク67及びロアリンク68は、例えば、平行で且つ取付部長さを同一とした平行リンクであり、図では、アッパリンク67及びロアリンク68は、アッパリンク67の側方延出ピン74が第1窓部81の下端に当たって、最も下方にスイングした位置にある。なお、97,98はアッパリンク67の両端をベースプレート63及び連結部材71に連結する連結ピン、101,102はロアリンク68の両端をベースプレート63及び連結部材71に連結する連結ピンである。
【0023】
連結部材71は、後部に、作業装置側の先端に設ける円柱状部材を挿入する円筒部104を備え、円柱状部材の抜け止めのためのロックピン105を円筒部104に貫通させ、このロックピン105の抜け止めのための抜け止めピン106をロックピン105の先端に挿入したものである。
【0024】
跳ね上げレバー73は、ベースアーム66に取付けた先端プレート108と、この先端プレート108から後方斜め上方にほぼクランク状に延ばしたレバー部111とからなり、先端プレート108に側方突出ピン88を取付け、この側方突出ピン88をベースプレート63の下部切欠き部91,92に選択的に掛けることができるものである。
【0025】
沈み込み位置調整機構76は、アッパリンク67の下部を支持するためにベースプレート63に支軸113を介してスイング可能に取付けたほぼL字状に成形したL字リンク114と、このL字リンク114の先端に支軸115を介してスイング可能に連結した上部リンク116と、この上部リンク116の側面に取付けた係止ピン82と、上部リンク116の先端から上方に延ばした操作レバー117とからなり、ベースプレート63側のばね支持ピン95に一端を掛けた引張コイルばね118の他端を係止ピン82に掛けることで、係止ピン82が上部切欠き部83〜85から外れにくくしたものである。
ここで、21aはワッシャ、21bは各ピンの端部に抜け止めのために挿入した割りピンである。
【0026】
図5は図4の5矢視図であり、ベースアーム66を、左アーム121及び右アーム122と、これらの左アーム121及び右アーム122のそれぞれを結合する結合プレート部123とから一体成形するとともに左アーム121及び右アーム122の側面にそれぞれ支軸64,64を取付け、これらの支軸64,64を左右のベースプレート63,63で回転可能に支持し、アッパリンク67を左リンク125及び右リンク126から構成し、これらの左リンク125及び右リンク126に貫通するように側方延出ピン74を取付け、支軸72に巻き付けたねじりコイルばね128で跳ね上げレバー73に跳ね上げレバー73の後端を下げようとする弾性力を作用させ、沈み込み位置調整機構76の操作レバー117を門形として左右の上部リンク116,116に取付けたことを示す。
【0027】
図6は本発明に係る農作業機に作業装置を連結した状態を示す側面図であり、農作業機10の連結機構21に作業装置としての畝立て機22を連結したことを示す。
畝立て機22は、部品の配置を変更することで平畝と丸畝との両方を形成することができるものである。
【0028】
図7(a),(b)は本発明に係る連結機構の作用を示す第1作用図であり、アッパリンク67及びロアリンク68の作用を説明する。
(a)はアッパリンク67及びロアリンク68のそれぞれの後端に取付けた連結部材71が最も低い位置にある状態を示す。即ち、アッパリンク67の側方延出ピン74が第1窓部81の下端に当たっている状態である。
【0029】
(b)は、アッパリンク67及びロアリンク68が共に上方へスイングし、アッパリンク67及びロアリンク68の連結部材71側の端部がベースアーム66側の端部よりも高位置にある状態を示す。即ち、連結ピン98が連結ピン97よりも高位置にあり、連結ピン102が連結ピン101よりも高位置にある。
【0030】
図8は本発明に係る連結機構の作用を示す第2作用図であり、作業装置に作用する押し下げ力について説明する。
例えば、畝立て機22で畝を立てる前には、畝立て機22が土壌132に接地した状態にあり、走行車輪13,14も接地している。
この状態では、アッパリンク67及びロアリンク68はそれぞれの後端側が前端側よりも高位置にある。
【0031】
この状態から走行車輪13,14が回転して農作業機が前進すると、畝立て機22には土壌132上を牽引するときの牽引抵抗力Rが矢印で示すように後向きに発生する。
【0032】
これにより、アッパリンク67及びロアリンク68に、アッパリンク67及びロアリンク68の長手方向に沿った前斜め下向きの牽引力T3が発生する。
従って、畝立て機22は、牽引力T3の鉛直下向きの分力T4及び自重によって次第に土壌132中に沈み込む。
【0033】
図9(a)〜(d)は本発明に係る農作業機及び畝立て機の作用を示す第3作用図であり、畝立て作業を順に説明する。
(a)は畝立て作業開始前の農作業機10及び畝立て機22を示す。
アッパリンク67及びロアリンク68は上下に拘束なくスイングできる状態にあるため、走行車輪13,14及び畝立て機22の両方が土壌132上に接地した状態にあり、アッパリンク67及びロアリンク68は、畝立て機22側の端部が走行車輪13,14側の端部よりも高位置にある。
【0034】
(b)において、走行車輪13,14を駆動して走行を開始するとともに耕耘装置15,16で耕耘を開始すると、農作業機10は前下がりになり、アッパリンク67及びロアリンク68の傾きは(a)の状態よりも小さくなり、畝立て機22は接地した状態を維持する。
【0035】
(c)は、農作業機10が更に前進して耕耘装置15,16による耕耘深さが必要耕耘深さDに達し、走行車輪13,14が既に耕耘した土壌、即ち既耕地133に入って沈み始め、畝立て機22も次第に沈み始める。このとき、アッパリンク67及びロアリンク68の傾きは(b)の状態よりも大きくなる。
【0036】
(d)は、更に農作業機10が前進し、畝立て機22の下端が既耕地133の底部に達し、その高さ位置を維持しながら畝134を形成する状態を示す。このとき、アッパリンク67及びロアリンク68はほぼ水平な状態にあり、畝立て機22への押し下げ力はほとんど発生しない。
【0037】
以上の図6〜図8で説明したように、本発明は、動力伝達装置12の後部に走行車輪13,14用の左車軸13a及び右車軸14aを設け、これらの左車軸13a及び右車軸14aの前方に耕耘装置15,16を取付け、左車軸13a及び右車軸14aの後方であって動力伝達装置12の後部に畝立て機22等の作業装置を連結機構21を介して連結可能とした歩行型農作業機10において、連結機構21は、動力伝達装置12の後部側にアッパリンク67とロアリンク68とのそれぞれの一端をスイング自在に取付け、それぞれの他端を畝立て機22側にスイング自在に取付け、動力伝達装置12に連結した畝立て機22と、走行車輪13,14とを作業開始前に土壌132に接地させた状態では、アッパリンク67及びロアリンク68の畝立て機22側の端部を動力伝達装置12側の端部よりも高位置に配置したことを特徴とする。
【0038】
土壌132に接地させた畝立て機22を牽引して作業を開始したときに、畝立て機22側の端部を動力伝達装置12側の端部よりも高位置に配置したアッパリンク67及びロアリンク68によって、アッパリンク67及びロアリンク68に前下がりの向きの牽引力T3を発生させることができ、この牽引力T3の鉛直下向きの分力T4で畝立て機22を土壌132中に沈み込ませることができる。また、畝立て機22が土壌132中に沈み込んでアッパリンク67及びロアリンク68がほぼ水平な状態になれば、畝立て機22には鉛直下向きの分力T4が作用しなくなるため、畝立て機22の沈み込み深さを維持することができる。
【0039】
従って、歩行型農作業機10のオペレータが畝立て機22を沈み込ませるために、例えばハンドル18を下方に押し付けたり押し付け力を経験や勘によって調整する必要がなく、畝立て機22による作業を容易に行うことができるとともに、オペレータの作業負担を軽減することができ、更には、畝立て機22の沈み込み位置を維持することができて、安定した作業深さを得ることができる。これにより、畝を一定の高さに形成することができ、作物の生育のばらつきをなくすことができる。
【0040】
図10(a),(b)は本発明に係る連結機構の作用を示す第4作用図であり、沈み込み位置調整機構76の作用を説明する。
(a)は沈み込み位置調整機構76の係止ピン82を第1窓部81の最も下に位置する上部切欠き部83に掛けたことを示す。
この状態では、アッパリンク67及びロアリンク68がやや後下がりに傾斜する。
【0041】
(b)は沈み込み位置調整機構76の係止ピン82を第1窓部81の最も上に位置する上部切欠き部85に掛けたことを示す。この状態は、(a)の状態に対して、L字リンク114が支軸113を中心にして反時計回りにスイングし、側方延出ピン74を介してアッパリンク67を反時計回りにスイングさせた状態である。このときの連結部材71を、説明の都合上、連結部材71Cとする。
【0042】
この状態では、アッパリンク67及びロアリンク68がやや後上がりに傾斜する。(a)に示した位置にある連結部材71を、説明の都合上、連結部材71Aとし、係止ピン82を上部切欠き部84に掛けたときの連結部材71を、説明の都合上、連結部材71Bとすると、連結部材71の上下動の下限位置が、連結部材71C、連結部材71B、連結部材71Aの順で次第に下側になる。
【0043】
図11(a),(b)は本発明に係る沈み込み位置調整機構の作用を示す第5作用図であり、畝立て機22の沈み込み量の調整について説明する。
(a)は沈み込み位置調整機構76を調整して、連結部材71が最も低い位置となるようにすれば、畝立て機22の沈み込み量を最も大きくすることができる。このときの畝134の高さをH1とする。畝立て機22の下面は既耕地133の底部に位置する。なお、d1は既耕地133の上端と畝134の上端との高低差であり、畝134を形成したときの圧縮量である。
【0044】
(b)は沈み込み位置調整機構76を調整して、連結部材71を(a)の位置よりも高くすれば、畝立て機22の沈み込み量を小さくすることができる。このときの畝134の高さをH2とすると、H2<H1となる。なお、d2は既耕地133の上端と畝134の上端との高低差、即ち、畝134を形成したときの圧縮量であり、ここではd2はほとんどd1に等しくして、必要な畝134の硬さを得る。
【0045】
図12(a)〜(c)は本発明に係る連結機構の作用を示す第6作用図であり、跳ね上げレバー73の作用を説明する。
(a)はベースプレート63の下部切欠き部91に跳ね上げレバー73の側方突出ピン88を掛けた状態である。
【0046】
(b)は(a)の状態から、側方突出ピン88が下部切欠き部91から外れるようにレバー部111を上方へスイングさせ、そして、レバー部111を後方斜め上方へ引いて側方突出ピン88が下部切欠き部91から離れた状態を示す。
【0047】
このとき、ベースアーム66は、支軸64を中心にして反時計回りにスイングし、アッパリンク67に設けた図示せぬストッパがベースアーム66に当たるために、ベースアーム66のスイングに伴ってアッパリンク67及びロアリンク68がベースアーム66と一体的にスイングする。
【0048】
(c)は(b)の状態から、更にレバー部111を後方斜め上方へ引き、側方突出ピン88を下部切欠き部92に臨む位置まで移動させた後にレバー部111を下方へスイングさせ、側方突出ピン88を下部切欠き部92に掛けた状態である。
この状態は、ベースアーム66、アッパリンク67及びロアリンク68が(b)の状態から更に上方へ一体的にスイングした状態である。
【0049】
図13は本発明に係る畝立て機の跳ね上げ状態を示す第7作用図であり、畝立て機22を跳ね上げレバー73で跳ね上げた状態を示す。畝立て機22で畝立て作業中に旋回するときや畝立て前に、あるいは畝立てを終えて走行する等のときの状態である。
【0050】
単に平行リンクを上方へスイングさせただけでは、跳ね上げ高さを確保できなかったり、平行リンクを長くしなければならないが、本発明の連結機構21は、アッパリンク67及びロアリンク68をベースアーム66に取付け、ベースアーム66を跳ね上げレバー73で上方へスイングさせて畝立て機22を跳ね上げるようにしたので、アッパリンク67及びロアリンク68の全長を大きくすることなく跳ね上げ高さを確保することができ、しかも、アッパリンク67及びロアリンク68が短いことから、跳ね上げた畝立て機22が後方へ大きく突出することがなく、ハンドル18の後端よりも前方に配置することができ、畝立て機22を跳ね上げた状態でも農作業機10の移動の邪魔にならず、都合がよい。
【0051】
図14(a)〜(d)は本発明に係る農作業機の沈み込み位置調整機構の別の実施の形態を示す説明図であり、図2及び図4に示した実施の形態と同一構成については同一符号を付け、詳細説明は省略する。
(a)は農作業機10に連結機構141を介して畝立て機22を連結した状態の側面図を示す。
連結機構141は、農作業機10の後部に取付けたベース部材142と、このベース部材142にスイング可能に取付けたアッパリンク67及びロアリンク68と、これらのアッパリンク67及びロアリンク68のそれぞれの後端にスイング可能に取付けるとともに畝立て機22を連結する連結部材71と、アッパリンク67の後端を連結部材71に連結する連結ピン98にスイング可能に取付けた第1リンク143と、この第1リンク143の先端にスイング可能に取付けた第2リンク144と、この第2リンク144に一体的に取付けた操作レバー146と、これらの第2リンク144及び操作レバー146をスイング可能に支持するためにベース部材142に取付けた支持ピン147とを備える。
【0052】
(b)は操作レバー146の操作を説明する側面図を示す。
連結機構141の操作レバー146を矢印▲1▼の向きにスイングさせると、第2リンク144及び第1リンク143を介してアッパリンク67及びロアリンク68が反時計回りにスイングし、畝立て機22が矢印▲2▼のように上昇する。即ち、畝立て機22の沈み込み位置が高くなる。
【0053】
(c)は、連結機構141を示す側面図であり、連結機構141は、ベース部材142に取付けた係止部材151と、操作レバー146に係合する係合片152を備える。
【0054】
第1リンク143は、長穴154を開け、この長穴154内を連結ピン98が移動可能にした部材である。
係止部材151は、コ字状のコ字切欠き部156…(…は複数個を示す。以下同じ。)を形成した部材であり、これらのコ字切欠き部156…に操作レバー146を選択的に係止することで操作レバー146の固定位置を変更し、畝立て機の沈み込み位置を調整する。
【0055】
係合片152は、上部に切欠き部158を設け、この切欠き部158に操作レバー146を係合して操作レバー146と一体的にスイングするようにした部材である。
【0056】
(d)は(c)のd−d線断面図であり、支持ピン147に上部を湾曲させた係合片152を取付け、この係合片152に、支持ピン147に端部を嵌合させた操作レバー146の中間部を係合させ、支持ピン147を貫通させたベース部材142と操作レバー146との間の支持ピン147にカラー161を嵌め、ベース部材142の外側に突出した支持ピン147の一端部に止め輪162を取付けてベース部材142からの支持ピン147の抜け止めとし、ベース部材142の上部に湾曲させた係合部材151を取付け、支持ピン147の他端部に第2リンク144を取付け、支持ピン147の他端部を、ベース部材142と一体的に設けた別のベース部材163に貫通させ、ベース部材163の外側に突出した支持ピン147の他端部に止め輪164を取付けてベース部材163からの支持ピン147の抜け止めとしたことを示す。
【0057】
操作レバー146の位置を変更するには、操作レバー146を想像線の位置、即ち係合部材151のコ字切欠き部156を外れる位置まで撓ませ、その状態で操作レバー146をスイングさせて別のコ字切欠き部156に係止する。
【0058】
尚、本発明のアッパリンク及びロアリンクは、実施の形態に示したような直線状のものに限らず、曲線上のものや複数の直線からなるものでもよい。
【0059】
【発明の効果】
本発明は上記構成により次の効果を発揮する。
請求項1の歩行型農作業機は、連結機構に関し、機体の後部側にアッパリンクとロアリンクとのそれぞれの一端をスイング自在に取付け、それぞれの他端を作業装置側にスイング自在に取付け、機体に連結した作業装置と、走行車輪とを作業開始前に土壌に接地させた状態では、アッパリンク及びロアリンクの作業装置側の端部を機体側の端部よりも高位置に配置したので、土壌に接地させた作業装置を牽引して作業を開始したときに、作業装置側の端部を機体側の端部よりも高位置に配置したアッパリンク及びロアリンクによって、アッパリンク及びロアリンクに前下がりの向きの牽引力を発生させることができ、この牽引力の鉛直下向きの分力で作業装置を土壌中に沈み込ませることができる。また、作業装置が土壌中に沈み込んでアッパリンク及びロアリンクがほぼ水平な状態になれば、作業装置には鉛直下向きの分力が作用しなくなるため、作業装置の沈み込み深さを維持することができる。
【0060】
従って、歩行型農作業機のオペレータが作業装置を沈み込ませるために、例えばハンドルを下方に押し付けたり押し付け力を経験や勘によって調整する必要がなく、作業装置による作業を容易に行うことができるとともに、オペレータの作業負担を軽減することができ、更には、作業装置の沈み込み位置を維持することができて、安定した作業深さを得ることができる。
これにより、畝を一定の高さに形成することができ、作物の生育のばらつきをなくすことができる。
【図面の簡単な説明】
【図1】本発明に係る歩行型農作業機の斜視図
【図2】本発明に係る農作業機の側面図
【図3】本発明に係る農作業機の平面図
【図4】本発明に係る連結機構の側面図
【図5】図4の5矢視図
【図6】本発明に係る農作業機に作業装置を連結した状態を示す側面図
【図7】本発明に係る連結機構の作用を示す第1作用図
【図8】本発明に係る連結機構の作用を示す第2作用図
【図9】本発明に係る農作業機及び畝立て機の作用を示す第3作用図
【図10】本発明に係る連結機構の作用を示す第4作用図
【図11】本発明に係る沈み込み位置調整機構の作用を示す第5作用図
【図12】本発明に係る連結機構の作用を示す第6作用図
【図13】本発明に係る畝立て機の跳ね上げ状態を示す第7作用図
【図14】本発明に係る農作業機の沈み込み位置調整機構の別の実施の形態を示す説明図
【図15】従来の歩行型農作業機の後部及び牽引作業機を示す要部側面図(従来例1)
【図16】従来の歩行型農作業機の牽引作業状態を示す側面図(従来例1)
【図17】従来の歩行型農作業機の側面図(従来例2)
【図18】従来の歩行型農作業機の昇降機構の側面図(従来例2)
【符号の説明】
10…歩行型農作業機、12…機体(動力伝達装置)、13,14…走行車輪、13a,14a…車軸(左車軸、右車軸)、15,16…耕耘装置、21…連結機構、22…作業装置(畝立て機)、67…アッパリンク、68…ロアリンク、132…土壌、T3…牽引力、T4…分力
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a walk-type farm work machine that pulls a work device such as a vertical machine.
[0002]
[Prior art]
As a walk-type farm work machine, one provided with a guide arm that regulates the position of a towing work machine to be pulled to the rear (see, for example, Patent Document 1), an elevating mechanism for connecting various sub work devices so as to be able to move up and down freely. (For example, refer to Patent Document 2).
[0003]
[Patent Document 1]
JP 2001-238504 A (page 3-4, FIGS. 1 and 3)
[Patent Document 2]
JP-A-10-225205 (page 3-7, FIG. 1, FIG. 12)
[0004]
FIG. 1 of Patent Document 1 will be described with reference to FIG. 15 below, and FIG. 3 of Patent Document 1 will be described with reference to FIG. In addition, the code | symbol was reassigned.
FIG. 15 is a side view of a main part showing a rear part of a conventional walking type farm working machine and a traction working machine (conventional example 1), and a frame plate 202 is provided at the rear part of a transmission case 201 provided in a cultivator as a walking type farm working machine. The frame plate 202 is connected to a frame 204 as a traction work machine via a tow bar 203, and a guide arm 205 is attached to the frame plate 202 so as to be able to swing up and down. An upper restricting portion 206 is attached to the guide arm 205. It shows that the position of the pin shaft 207 provided on the pulling bar 203 is restricted by the upper restricting portion 206.
[0005]
FIG. 16 is a side view (conventional example 1) showing the state of traction work of a conventional walking type farm working machine. The hard soil 213 is changed to the cultivated soil 214 by the tilling claws 212 while running on the drive wheels 211, and Shows the formation of wrinkles.
[0006]
FIG. 1 of Patent Document 2 will be described with reference to FIG. 17 below, and FIG. 12 of Patent Document 2 will be described with reference to FIG. In addition, the code | symbol was reassigned.
FIG. 17 is a side view of a conventional walking type farm working machine (conventional example 2), in which a seeding device 222 as various sub-working devices is connected to the rear part of the walking type farm working machine 221 through a lifting mechanism so as to be movable up and down. Show. Reference numeral 224 denotes a rotary device provided with a rotary claw 225, and reference numeral 226 denotes a traveling wheel attached to the axle shaft 227.
[0007]
FIG. 18 is a side view (conventional example 2) of a lifting mechanism of a conventional walking type farm working machine, and shows a state in which a transmission guide body 231 is attached to the rear part of the transmission case, and the lifting mechanism 232 is attached to the transmission guide body 231. .
[0008]
The elevating mechanism 232 includes a link support 234 attached to the speed change guide body 231, an upper link 235 and a lower link 236 having one end attached to the link support 234 so as to be able to swing up and down, and the upper link 235 and the lower side A main body side hitch 237 attached to each other end of the link 236 so as to be swingable. A seeding device is attached to the main body side hitch 237.
[0009]
[Problems to be solved by the invention]
In FIG. 15, if the position of the pin shaft 207 of the tow bar 203 is restricted by the upper restricting portion 206 formed on the guide arm 205, the drive wheel 211 cannot move downward with respect to the setting device 204 in FIG. 16. In a state where the lower surface of the setting device 204 is in contact with the soil before the work starts, the driving wheel 211 is in a state of floating from the soil, and the driving force by the driving wheel 211 cannot be obtained. Therefore, for example, when the operator forcibly touches the drive wheel 211 by pushing down the handle of the cultivator, the driving force can be obtained, and the operation shown in FIG. 16 becomes possible. However, this increases the burden on the operator.
[0010]
Further, as shown in FIG. 17, when the seeding device 222 is lowered by the lifting mechanism 232 to perform the work, as shown in FIG. 18, the upper link 235 and the lower link 236 are inclined backward and downward. To do. In this state, when the walking type farm work machine 221 is advanced, a traction force T <b> 1 that rises forward along the longitudinal direction of the upper link 235 and the lower link 236 is generated in FIG. 18. Accordingly, in FIG. 17 and FIG. 18, while the walking type farm working machine 221 pulls the seeding device 222, it becomes difficult to maintain the seeding device 222 at a necessary height position by the vertically upward component force T <b> 2 of the traction force T <b> 1.
[0011]
Therefore, an object of the present invention is to improve the walking type farm working machine, and to maintain a stable working depth by maintaining the necessary height position of the working device, for example, the depth of sinking into the soil in the vertical machine. It is to make it easy to obtain and to reduce the work burden on the operator.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is provided with an axle for a traveling wheel at the rear part of the machine body, a tilling device is attached to the front of the axle, and a work such as a vertical machine is arranged behind the axle and at the rear part of the machine body. In the walking type farm working machine that can be connected through a connecting mechanism, with respect to the connecting mechanism, one end of each of the upper link and the lower link is swingably attached to the rear side of the machine body, and the other end is connected to the working device. In the state where the work device and the traveling wheel connected to the machine body are swingably attached to the soil and grounded to the soil before the work is started, the end of the upper link and the lower link on the work device side is more than the end of the machine side by disposing the high position, during towing the working device, as swingable state upper link and lower link up and down, to generate a pre obliquely downward traction on the upper link and lower link, this The working device by vertically downward component force of traction, characterized in that the sinking into the soil.
[0013]
When starting the work by pulling the work device that is grounded to the soil, the upper link and the lower link are arranged by the upper link and the lower link in which the end on the work device side is positioned higher than the end on the airframe side. It is possible to generate a traction force in a downward direction, and the working device can be submerged in the soil with a vertically downward component of the traction force. In addition, when the working device sinks into the soil and the upper link and the lower link are in a substantially horizontal state, a vertical downward component force does not act on the working device, so the working device maintains the sinking depth. be able to.
[0014]
Accordingly, in order for the operator of the walking type agricultural working machine to sink the work device, for example, it is not necessary to press the handle downward or adjust the pressing force by experience or intuition, and the work device can be easily operated. The work burden on the operator can be reduced, and further, the sinking position of the working device can be maintained, and a stable working depth can be obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a perspective view of a walking farm machine according to the present invention. A walking farm machine 10 (hereinafter simply referred to as “agricultural machine 10”) is connected from an engine 11 to a power transmission device 12 as a machine body. Power is transmitted to the left and right traveling wheels 13 and 14 (only the reference numeral 13 on the front side is shown) and the left and right tillage devices 15 and 16 disposed in front of these traveling wheels 13 and 14, and the rear of the power transmission device 12. It is an agricultural machine having a structure for connecting work devices such as a treadmill, and plows it with, for example, a treadmill while plowing the field with the tillers 15 and 16.
[0016]
FIG. 2 is a side view of an agricultural machine according to the present invention. The agricultural machine 10 includes an engine 11 arranged at the upper part of the machine body and a clutch (not shown. 17 is a clutch case for housing the clutch) below the engine 11. And the power transmission device 12 attached to the front portion of the power transmission device 12 via left and right tillage shafts 15a and 16a (only the front side reference numeral 15a is shown). 15, 16, traveling wheels 13, 14 rotatably attached to the rear portion of the power transmission device 12 via a left axle 13 a and a right axle 14 a (not shown), and extending rearward and obliquely upward from the rear portion of the power transmission device 12. And a connecting mechanism 21 attached to the rear end of the power transmission device 12.
[0017]
Here, 31 is a traveling auxiliary wheel attached to the front end of the power transmission device 12 so that the position can be adjusted vertically, 32 is a fender that covers the power transmission device 12 and the tilling devices 15 and 16, and 33 is above the engine 11. Covering engine cover, 34 is an air cleaner, 35 is a fuel tank filler cap, 36 is a speed change lever, 37 is a diff lock lever, 38 is a clutch lever, and 41 is a spring for lifting the working device connected to the coupling mechanism 21. The lever 42 is a sinking position adjusting lever that adjusts the sinking position of the working device connected to the connecting mechanism 21.
[0018]
FIG. 3 is a plan view of the agricultural machine according to the present invention. The agricultural machine 10 includes a recoil starter knob 51 for starting the engine 11 and a throttle lever 52 for adjusting the output of the engine 11 at the right front part of the handle 18. And the above-described differential lock lever 37, an engine switch 53 for stopping the engine 11 is attached to the left rear portion of the handle 18, a clutch lever 38 is attached to the rear portion of the handle 18, and the power transmission device 12 (see FIG. 1). It shows that the speed change lever 36 is extended from the rear center to the rear, and the jumping lever 41 is extended from the rear left part of the coupling mechanism 21 to the rear.
[0019]
FIG. 4 is a side view of the connecting mechanism according to the present invention. The connecting mechanism 21 includes left and right base plates 63, 63 attached to the rear end of the power transmission device 12 (see FIG. 1) with bolts 61, 61 and nuts 62, 62. (Only the reference numeral 63 on the front side is shown), a base arm 66 disposed between the base plates 63 and 63 and attached to the base plates 63 and 63 via a support shaft 64 so as to be swingable. The upper link 67 and the lower link 68 that are swingably attached, the connecting member 71 that is swingably attached to the upper link 67 and the lower link 68, and the base arm 66 that is swingably attached to the tip of the base arm 66. By moving the flip-up lever 73 and the side extending pin 74 attached to the middle part of the upper link 67 up and down, Parinku consisting 67 and lower link 68 and the connecting member 71 via a linking member 71 working device location position adjusting mechanism 76. sinking adjusting the sinking of the soil to be connected to.
The upper link 67 and the lower link 68 described above are members constituting the connection link 78.
[0020]
The base plate 63 has an upper notch 83-83 for opening a first window 81 for projecting the laterally extending pin 74 from between the base plates 63, 63 to the outside at a substantially center, and for hooking a locking pin 82 on the upper part. The second window portion 87 provided with 85 is opened, and lower notches 91 and 92 are formed in the lower portion to hang a side protruding pin 88 provided at the tip of the flip-up lever 73.
[0021]
The base arm 66 is a member in which a tensile force is applied by the tension coil spring 94 when swinging upward about the support shaft 64.
The tension coil spring 94 is a member that has one end hooked on a spring support pin 95 provided on the base plate 63 and the other end hooked on a spring hooking hole 66 a formed in the base arm 66. The tension coil spring 94 reduces the operating force of the flip-up lever 73.
[0022]
The upper link 67 and the lower link 68 are, for example, parallel links that are parallel and have the same mounting portion length. In the figure, the upper link 67 and the lower link 68 have the side extending pins 74 of the upper link 67 as the first one. It hits the lower end of one window 81 and is in the position swung downward. Reference numerals 97 and 98 denote connecting pins for connecting both ends of the upper link 67 to the base plate 63 and the connecting member 71, and 101 and 102 denote connecting pins for connecting both ends of the lower link 68 to the base plate 63 and the connecting member 71.
[0023]
The connecting member 71 is provided with a cylindrical part 104 for inserting a columnar member provided at the front end on the working device side at the rear part, and a lock pin 105 for preventing the columnar member from coming off is passed through the cylindrical part 104. A retaining pin 106 for retaining 105 is inserted at the tip of the lock pin 105.
[0024]
The flip-up lever 73 is composed of a tip plate 108 attached to the base arm 66 and a lever portion 111 extending from the tip plate 108 obliquely rearward and upward substantially in a crank shape, and a side protruding pin 88 is attached to the tip plate 108. The side protruding pins 88 can be selectively hung on the lower notches 91 and 92 of the base plate 63.
[0025]
The sinking position adjusting mechanism 76 includes an L-shaped link 114 formed in a substantially L-shape that is swingably attached to the base plate 63 via a support shaft 113 in order to support the lower portion of the upper link 67, and the L-shaped link 114. The upper link 116 is connected to the tip of the upper link 116 via a support shaft 115 so as to be swingable, the locking pin 82 is attached to the side of the upper link 116, and the operation lever 117 extends upward from the tip of the upper link 116. The other end of the tension coil spring 118 with one end hung on the spring support pin 95 on the base plate 63 side is hung on the locking pin 82, thereby making it difficult for the locking pin 82 to come off from the upper notches 83 to 85. .
Here, 21a is a washer, and 21b is a split pin inserted at the end of each pin to prevent it from coming off.
[0026]
FIG. 5 is a view taken in the direction of the arrow 5 in FIG. 4, and the base arm 66 is integrally formed from the left arm 121 and the right arm 122 and the coupling plate portion 123 that couples each of the left arm 121 and the right arm 122. In addition, support shafts 64 and 64 are attached to the side surfaces of the left arm 121 and the right arm 122, respectively, and these support shafts 64 and 64 are rotatably supported by the left and right base plates 63 and 63, and the upper link 67 is connected to the left link 125 and the right arm. The link 126 includes a side extension pin 74 that passes through the left link 125 and the right link 126, and a torsion coil spring 128 wound around the support shaft 72. Applying an elastic force to lower the rear end, the operation lever 117 of the sinking position adjusting mechanism 76 is a gate and the upper left and right Indicating that it has attached to the tank 116, 116.
[0027]
FIG. 6 is a side view showing a state in which the working device is connected to the agricultural machine according to the present invention, and shows that the upright machine 22 as the working device is connected to the connecting mechanism 21 of the agricultural machine 10.
The erecting machine 22 can form both a flat plate and a round plate by changing the arrangement of parts.
[0028]
FIGS. 7A and 7B are first operation diagrams showing the operation of the coupling mechanism according to the present invention, and the operation of the upper link 67 and the lower link 68 will be described.
(A) shows the state which has the connection member 71 attached to each rear end of the upper link 67 and the lower link 68 in the lowest position. That is, the side extension pin 74 of the upper link 67 is in contact with the lower end of the first window portion 81.
[0029]
(B) shows a state in which both the upper link 67 and the lower link 68 swing upward, and the end of the upper link 67 and the lower link 68 on the connecting member 71 side is higher than the end of the base arm 66 side. Show. That is, the connecting pin 98 is located higher than the connecting pin 97, and the connecting pin 102 is located higher than the connecting pin 101.
[0030]
FIG. 8 is a second action diagram showing the action of the coupling mechanism according to the present invention, and the push-down force acting on the work device will be described.
For example, before setting up a kite with the propeller 22, the propeller 22 is in a state of being grounded to the soil 132, and the traveling wheels 13 and 14 are also grounded.
In this state, the rear end side of each of the upper link 67 and the lower link 68 is higher than the front end side.
[0031]
When the traveling wheels 13 and 14 are rotated from this state and the farm work machine moves forward, a traction resistance force R when pulling on the soil 132 is generated backward as indicated by an arrow in the tiling machine 22.
[0032]
As a result, a tractive force T3 that is inclined obliquely downward in the longitudinal direction of the upper link 67 and the lower link 68 is generated in the upper link 67 and the lower link 68.
Therefore, the rigging machine 22 gradually sinks into the soil 132 due to the vertically downward component force T4 of the traction force T3 and its own weight.
[0033]
9 (a) to 9 (d) are third operation diagrams showing the operation of the agricultural machine and the vertical machine according to the present invention, and the vertical operation will be described in order.
(A) shows the agricultural work machine 10 and the upright machine 22 before the start of the uprighting work.
Since the upper link 67 and the lower link 68 can swing without restraining up and down, both the traveling wheels 13 and 14 and the setting machine 22 are in a grounded state on the soil 132, and the upper link 67 and the lower link 68 are The end portion on the side of the vertical machine 22 is at a higher position than the end portion on the traveling wheels 13 and 14 side.
[0034]
In (b), when the traveling wheels 13 and 14 are driven to start traveling and tilling is started with the tilling devices 15 and 16, the agricultural working machine 10 is lowered forward, and the inclination of the upper link 67 and the lower link 68 is ( It becomes smaller than the state of a), and the erecting machine 22 maintains the grounded state.
[0035]
In (c), the farm work machine 10 further advances and the tilling depth by the tilling devices 15 and 16 reaches the necessary tilling depth D, and the traveling wheels 13 and 14 enter the already cultivated soil, that is, the already cultivated land 133 and sink. At first, the setting machine 22 begins to sink gradually. At this time, the inclination of the upper link 67 and the lower link 68 becomes larger than the state of (b).
[0036]
(D) shows a state in which the farm work machine 10 further moves forward, the lower end of the ridger 22 reaches the bottom of the cultivated land 133, and the ridge 134 is formed while maintaining its height position. At this time, the upper link 67 and the lower link 68 are in a substantially horizontal state, and a pressing force to the erecting machine 22 is hardly generated.
[0037]
As described above with reference to FIGS. 6 to 8, in the present invention, the left axle 13a and the right axle 14a for the traveling wheels 13 and 14 are provided in the rear part of the power transmission device 12, and the left axle 13a and the right axle 14a are provided. The tilling devices 15 and 16 are attached to the front of the vehicle, and the work device such as the vertical machine 22 can be connected to the rear portion of the power transmission device 12 via the connecting mechanism 21 behind the left axle 13a and the right axle 14a. In the agricultural machine 10, the coupling mechanism 21 is configured so that one end of each of the upper link 67 and the lower link 68 is swingably attached to the rear side of the power transmission device 12, and the other end is swingable to the erecting machine 22 side. The upper link 67 and the lower link 68 are connected to the soil 132 before the start of work. The end of the vertical machine 22 side, characterized in that arranged in a position higher than the end portion of the power transmission device 12 side.
[0038]
The upper link 67 and the lower link 67 are arranged such that when the work is started by pulling the vertical machine 22 grounded to the soil 132, the end part on the vertical machine 22 side is positioned higher than the end part on the power transmission device 12 side. The link 68 can generate a traction force T3 in a downward direction in the upper link 67 and the lower link 68, and the vertical machine component T4 of the traction force T3 is used to sink the setting machine 22 into the soil 132. Can do. Further, if the vertical machine 22 sinks into the soil 132 and the upper link 67 and the lower link 68 are in a substantially horizontal state, the vertical downward component force T4 does not act on the vertical machine 22, and thus the vertical machine 22 The sinking depth of the machine 22 can be maintained.
[0039]
Therefore, it is not necessary for the operator of the walking type farm working machine 10 to sink the vertical machine 22, for example, by pressing the handle 18 downward or adjusting the pressing force by experience or intuition, and the work by the vertical machine 22 is easy. In addition, the operator's work load can be reduced, and further, the sinking position of the erecting machine 22 can be maintained, and a stable working depth can be obtained. Thereby, a cocoon can be formed in fixed height, and the dispersion | variation in the growth of a crop can be eliminated.
[0040]
FIGS. 10A and 10B are fourth action diagrams showing the action of the coupling mechanism according to the present invention, and the action of the sinking position adjusting mechanism 76 will be described.
(A) shows that the locking pin 82 of the sinking position adjusting mechanism 76 is hooked on the upper notch 83 located at the lowest position of the first window 81.
In this state, the upper link 67 and the lower link 68 are inclined slightly rearwardly downward.
[0041]
(B) shows that the locking pin 82 of the sinking position adjusting mechanism 76 is hung on the upper notch 85 located on the top of the first window 81. In this state, the L-shaped link 114 swings counterclockwise around the support shaft 113 and the upper link 67 swings counterclockwise via the side extending pin 74 with respect to the state of (a). It is the state made to do. The connecting member 71 at this time is referred to as a connecting member 71C for convenience of explanation.
[0042]
In this state, the upper link 67 and the lower link 68 are inclined slightly rearward. For convenience of explanation, the connecting member 71 at the position shown in (a) is referred to as a connecting member 71A, and the connecting member 71 when the locking pin 82 is hung on the upper notch 84 is connected for convenience of explanation. When the member 71B is used, the lower limit position of the vertical movement of the connecting member 71 gradually becomes lower in the order of the connecting member 71C, the connecting member 71B, and the connecting member 71A.
[0043]
FIGS. 11A and 11B are fifth operation diagrams showing the operation of the subduction position adjusting mechanism according to the present invention, and the adjustment of the subtraction amount of the setting machine 22 will be described.
In (a), if the sinking position adjusting mechanism 76 is adjusted so that the connecting member 71 is at the lowest position, the sinking amount of the erecting machine 22 can be maximized. The height of the ridge 134 at this time is set to H1. The lower surface of the ridger 22 is located at the bottom of the cultivated land 133. In addition, d1 is a height difference between the upper end of the cultivated land 133 and the upper end of the ridge 134, and is a compression amount when the ridge 134 is formed.
[0044]
(B) can adjust the sinking position adjustment mechanism 76, and if the connection member 71 is made higher than the position of (a), the sinking amount of the setting machine 22 can be made small. If the height of the ridge 134 at this time is H2, H2 <H1. D2 is the difference in height between the upper end of the cultivated land 133 and the upper end of the ridge 134, that is, the amount of compression when the ridge 134 is formed. Here, d2 is almost equal to d1, and the necessary hardness of the ridge 134 is set. Get
[0045]
FIGS. 12A to 12C are sixth action views showing the action of the coupling mechanism according to the present invention, and the action of the flip-up lever 73 will be described.
(A) is a state where the side protrusion pin 88 of the flip-up lever 73 is hung on the lower notch 91 of the base plate 63.
[0046]
(B) from the state of (a), the lever part 111 is swung upward so that the side protrusion pin 88 is detached from the lower notch part 91, and the lever part 111 is pulled rearward and obliquely upward to protrude sideways. A state in which the pin 88 is separated from the lower notch 91 is shown.
[0047]
At this time, the base arm 66 swings counterclockwise about the support shaft 64, and a stopper (not shown) provided on the upper link 67 contacts the base arm 66, so that the upper link is accompanied by the swing of the base arm 66. 67 and the lower link 68 swing integrally with the base arm 66.
[0048]
(C), from the state of (b), further pulls the lever portion 111 rearward and obliquely, moves the side protruding pin 88 to a position facing the lower notch portion 92, and then swings the lever portion 111 downward, The side protruding pin 88 is hung on the lower notch 92.
In this state, the base arm 66, the upper link 67, and the lower link 68 are integrally swung upward from the state of (b).
[0049]
FIG. 13 is a seventh action diagram showing the flip-up state of the elevating machine according to the present invention, and shows the state where the erecting machine 22 is flipped up by the flip-up lever 73. This is a state when the vehicle is turned during the erecting work by the erecting machine 22, before the erecting, or after the erecting is finished.
[0050]
If the parallel link is simply swung upward, the jumping height cannot be ensured or the parallel link must be lengthened. However, the connecting mechanism 21 of the present invention uses the upper link 67 and the lower link 68 as the base arm. 66, and the base arm 66 is swung upward by the flip-up lever 73 so that the setting machine 22 is jumped up, so that the height of the upper link 67 and the lower link 68 can be secured without increasing the overall length. In addition, since the upper link 67 and the lower link 68 are short, the flip-up device 22 that is flipped up does not protrude greatly rearward, and can be disposed forward of the rear end of the handle 18. Even in a state where the erecting machine 22 is flipped up, it does not interfere with the movement of the agricultural working machine 10, which is convenient.
[0051]
14 (a) to 14 (d) are explanatory views showing another embodiment of the submersion position adjusting mechanism of the agricultural working machine according to the present invention, with the same configuration as the embodiment shown in FIGS. Are denoted by the same reference numerals, and detailed description thereof is omitted.
(A) shows the side view of the state which connected the vertical machine 22 to the agricultural working machine 10 via the connection mechanism 141. FIG.
The coupling mechanism 141 includes a base member 142 attached to the rear part of the agricultural machine 10, an upper link 67 and a lower link 68 swingably attached to the base member 142, and the rear of each of the upper link 67 and the lower link 68. A first connecting member 71 that swingably attaches to the end and connects the erecting machine 22; a first link 143 that swingably attaches to a connecting pin 98 that connects the rear end of the upper link 67 to the connecting member 71; The second link 144 swingably attached to the tip of the link 143, the operation lever 146 integrally attached to the second link 144, and the second link 144 and the operation lever 146 for swingably supporting the second link 144 And a support pin 147 attached to the base member 142.
[0052]
FIG. 5B is a side view for explaining the operation of the operation lever 146.
When the operation lever 146 of the coupling mechanism 141 is swung in the direction of the arrow (1), the upper link 67 and the lower link 68 are swung counterclockwise via the second link 144 and the first link 143, and the setting machine 22 Rises as shown by arrow (2). That is, the sinking position of the erecting machine 22 is increased.
[0053]
(C) is a side view showing the coupling mechanism 141, and the coupling mechanism 141 includes a locking member 151 attached to the base member 142 and an engagement piece 152 that engages with the operation lever 146.
[0054]
The first link 143 is a member in which a long hole 154 is opened and the connecting pin 98 is movable in the long hole 154.
The locking member 151 is a member in which a U-shaped U-shaped notch 156 (... indicates a plurality; the same applies hereinafter), and an operation lever 146 is provided in the U-shaped notch 156. By selectively locking, the fixing position of the operation lever 146 is changed, and the sinking position of the setting machine is adjusted.
[0055]
The engagement piece 152 is a member provided with a notch 158 in the upper part, and the operation lever 146 is engaged with the notch 158 so as to swing integrally with the operation lever 146.
[0056]
(D) is a cross-sectional view taken along the line dd of (c), and an engagement piece 152 having a curved upper portion is attached to the support pin 147, and the end of the support pin 147 is fitted to the engagement piece 152. The collar 161 is fitted to the support pin 147 between the operation lever 146 and the base member 142 through which the intermediate portion of the operation lever 146 is engaged and the support pin 147 is penetrated, and the support pin 147 protruding outside the base member 142 A retaining ring 162 is attached to one end of the base member 142 to prevent the support pin 147 from coming off from the base member 142, and a curved engagement member 151 is attached to the upper part of the base member 142, and the second link is attached to the other end of the support pin 147. 144 is attached, the other end of the support pin 147 is passed through another base member 163 provided integrally with the base member 142, and the other end of the support pin 147 protruding outside the base member 163. Indicating that the stopper of the support pin 147 from the base member 163 to attach the retaining ring 164.
[0057]
In order to change the position of the operation lever 146, the operation lever 146 is bent to the position of the imaginary line, that is, the position where the U-shaped notch 156 of the engagement member 151 is released, and the operation lever 146 is swung in that state. The U-shaped notch 156 is locked.
[0058]
The upper link and the lower link of the present invention are not limited to the linear ones as shown in the embodiment, but may be ones on a curved line or a plurality of straight lines.
[0059]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
The walking type agricultural work machine according to claim 1 relates to a connecting mechanism, wherein one end of each of the upper link and the lower link is swingably attached to the rear side of the machine body, and the other end is swingably attached to the work apparatus side. In the state where the working device and the traveling wheel connected to the ground are grounded to the soil before starting the work, the end on the working device side of the upper link and the lower link is arranged at a higher position than the end on the airframe side. When starting the work by pulling the work equipment that is grounded on the soil, the upper link and lower link are arranged by the upper link and lower link, which are arranged with the end on the work equipment higher than the end on the aircraft side. It is possible to generate a traction force in a downward direction, and the working device can be submerged in the soil with a vertically downward component of the traction force. In addition, when the working device sinks into the soil and the upper link and the lower link are in a substantially horizontal state, a vertical downward component force does not act on the working device, so the subsidence depth of the working device is maintained. be able to.
[0060]
Therefore, in order for the operator of the walking type agricultural machine to sink the work device, for example, it is not necessary to press the handle downward or adjust the pressing force by experience or intuition, and the work device can be easily operated. The work burden on the operator can be reduced, and further, the sinking position of the working device can be maintained, and a stable working depth can be obtained.
Thereby, a cocoon can be formed in fixed height, and the dispersion | variation in the growth of a crop can be eliminated.
[Brief description of the drawings]
FIG. 1 is a perspective view of a walking agricultural machine according to the present invention. FIG. 2 is a side view of the agricultural machine according to the present invention. FIG. 3 is a plan view of the agricultural machine according to the present invention. Fig. 5 is a side view of the mechanism. Fig. 5 is a view taken in the direction of arrow 5 in Fig. 4. Fig. 6 is a side view showing a state where the working device is connected to the agricultural machine according to the present invention. FIG. 8 is a second action diagram illustrating the action of the coupling mechanism according to the present invention. FIG. 9 is a third action chart illustrating the action of the agricultural working machine and the hoisting machine according to the present invention. FIG. 11 is a fifth operation diagram illustrating the operation of the subduction position adjusting mechanism according to the present invention. FIG. 12 is a sixth operation diagram illustrating the operation of the connection mechanism according to the present invention. FIG. 13 is a seventh action diagram showing a state in which the upright according to the present invention is flipped up. FIG. 14 is a subtraction of the agricultural machine according to the present invention. Explanatory view showing another embodiment of a location adjustment mechanism [15] partial side view showing the rear and traction working machine of a conventional walk-behind farm working machine (conventional example 1)
FIG. 16 is a side view showing a state of towing work of a conventional walking type farm working machine (conventional example 1).
FIG. 17 is a side view of a conventional walking type farm working machine (conventional example 2).
FIG. 18 is a side view of a lifting mechanism of a conventional walking farm machine (conventional example 2).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Walk type farm work machine, 12 ... Airframe (power transmission device), 13, 14 ... Traveling wheel, 13a, 14a ... Axle (left axle, right axle), 15, 16 ... Tillage device, 21 ... Connection mechanism, 22 ... Working device (raising machine), 67 ... upper link, 68 ... lower link, 132 ... soil , T3 ... traction force, T4 ... component force .

Claims (1)

機体の後部に走行車輪用の車軸を設け、この車軸の前方に耕耘装置を取付け、前記車軸の後方であって機体の後部に畝立て機等の作業装置を連結機構を介して連結可能とした歩行型農作業機において、
前記連結機構は、前記機体の後部側にアッパリンクとロアリンクとのそれぞれの一端をスイング自在に取付け、それぞれの他端を前記作業装置側にスイング自在に取付け、機体に連結した作業装置と前記走行車輪とを作業開始前に土壌に接地させた状態では、アッパリンク及びロアリンクの作業装置側の端部を機体側の端部よりも高位置に配置したことで、前記作業装置を牽引中は、前記アッパリンク及びロアリンクを上下にスイング可能な状態として、アッパリンク及びロアリンクに前斜め下向きの牽引力を発生させ、この牽引力の鉛直下向きの分力によって前記作業装置を土壌中に沈み込ませることを特徴とする歩行型農作業機。
An axle for traveling wheels is provided at the rear part of the fuselage, a tilling device is attached to the front of the axle, and a work device such as a vertical stand can be connected to the rear part of the fuselage via a coupling mechanism behind the axle. In walking farm machines,
The connection mechanism includes a working device coupled to a machine body, wherein one end of each of the upper link and the lower link is swingably attached to the rear side of the machine body, and the other end is swingably attached to the work apparatus side. In a state where the traveling wheel is in contact with the soil before starting work, the working device side of the upper link and the lower link is placed at a higher position than the end portion on the airframe side , and the working device is being pulled. Makes the upper link and the lower link swingable up and down, generates a forward diagonal downward traction force on the upper link and the lower link, and sinks the working device into the soil by the vertical downward component force of this traction force walking type agricultural machine, characterized in that the Maseru.
JP2002381361A 2002-12-27 2002-12-27 Walking type agricultural machine Expired - Fee Related JP3747029B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2002381361A JP3747029B2 (en) 2002-12-27 2002-12-27 Walking type agricultural machine
US10/702,537 US6854526B2 (en) 2002-12-27 2003-11-06 Walk-behind agricultural working machine
FR0315453A FR2849347B1 (en) 2002-12-27 2003-12-26 AGRICULTURAL WORKING MACHINE WITH WALKING DRIVER
CN200310124230.0A CN1262165C (en) 2002-12-27 2003-12-29 Hand agricultural tillage machine
CNU200320113723XU CN2686285Y (en) 2002-12-27 2003-12-29 Walking type farming implement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002381361A JP3747029B2 (en) 2002-12-27 2002-12-27 Walking type agricultural machine

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JP2004208578A JP2004208578A (en) 2004-07-29
JP3747029B2 true JP3747029B2 (en) 2006-02-22

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