JP3505682B2

JP3505682B2 - Management machine

Info

Publication number: JP3505682B2
Application number: JP2000351124A
Authority: JP
Inventors: 将憲中野; 裕光早田; 慶治上村
Original assignee: Yanma Agricultural Equipment Co Ltd
Current assignee: Yanma Agricultural Equipment Co Ltd
Priority date: 2000-11-17
Filing date: 2000-11-17
Publication date: 2004-03-08
Anticipated expiration: 2019-03-19
Also published as: JP2001187533A

Description

【発明の詳細な説明】【０００１】【発明の属する技術分野】本発明は例えば中耕除草また
は耕耘作業などを行う歩行型の管理機に関する。【０００２】【発明が解決しようとする課題】従来、走行輪を装設さ
せるミッションケースの後方斜上方に操向ハンドルを設
けて歩行作業を行う技術があるが、ミッションケースに
エンジン台を取付けてエンジンを載せる構造では、エン
ジン台を省いて軽量化並びに製造コスト低減などを容易
に行い得ない等の問題がある。【０００３】【課題を解決するための手段】然るに、本発明は、走行
輪を装設させるミッションケースに作業機を装設させ、
かつミッションケースの後方に操向ハンドルを連結さ
せ、前記ミッションケースにエンジンを載置させ、エン
ジンの駆動力を伝えて走行輪を駆動させる管理機におい
て、ミッションケース上面にエンジンを固定させ、エン
ジンの駆動力を上方から下方に伝えて走行輪を駆動させ
ると共に、ミッションケース前側に伝動ケースを固定さ
せ、伝動ケースにロータリ軸を軸支させるもので、機体
重量バランスの向上を容易に図り得るものである。【０００４】【発明の実施の形態】以下、本発明の実施例を図面に基
づいて詳述する。図１乃至図７に示す如く、左右一対の
走行輪（１）をミッションケース（２）に車軸（３）を
介して装設させ、ミッションケース（２）後部にハンド
ル台（４）下部を固定させ、ハンドル台（４）上部に操
向ハンドル（５）を連結させ、ミッションケース（２）
の後方斜上方に操向ハンドル（５）を設け、変速レバー
（６）、クラッチレバー（７）ＰＴＯレバー（８）など
を操向ハンドル（５）の操作部（９）に取付けると共
に、前記ミッションケース（２）上面の略水平面（１
０）にエンジン（１１）を上載させて固定させ、エンジ
ン（１１）出力を無段変速する油圧変速機（１２）をミ
ッションケース（２）後部の側面に固定させ、テンショ
ンクラッチ（１３）を介して張設させるベルト（１４）
及びプーリ（１５）（１６）を介してエンジン（１１）
の出力軸（１７）に油圧変速機（１２）の入力軸（１
８）を連結させる。【０００５】また、前記ミッションケース（２）を側面
視Ｌ形に形成して後側を下方に突出させ、ミッションケ
ース（２）後側の下部に車軸（３）を軸支させ、ミッシ
ョンケース（２）後部の上下延設部（１９）に走行変速
機構（２０）を設け、車軸（３）の略直上に入力軸（１
８）を配設させ、入力軸（１８）の略直上に出力軸（１
７）を配設させるもので、エンジン（１１）の下方に油
圧変速機（１２）を配設させ、油圧変速機（１２）の下
方に車軸（３）を配設させ、エンジン（１１）の駆動力
を上方から下方に伝えて走行輪（１）を駆動させる。【０００６】さらに、前記ミッションケース（２）前側
を前方に突出させて前部にＰＴＯ軸（２１）を軸支さ
せ、伝動ケース（２２）とサイドフレーム（２３）をミ
ッションケース（２）前部に固定させ、伝動ケース（２
２）及びサイドフレーム（２３）を介して作業機（２
４）を設け、ミッションケース（２）前側に作業機（２
４）を装設させるもので、伝動ケース（２２）とサイド
フレーム（２３）にロータリ軸（２５）の両端部を回転
自在に軸支させ、耕耘と草刈に兼用する複数の切削ロー
タリ刃（２６）をロータリ軸（２５）に取付け、各切削
ロータリ刃（２６）の上面及び左右をロータリカバー
（２７）によって閉塞させ、前記作業機（２４）を構成
する。また、前記ミッションケース（２）前部の前後延
設部（２８）にＰＴＯ変速機構（２９）を設け、前記入
力軸（１８）前方にＰＴＯ軸（２１）を設けて作業機
（２４）のロータリ軸（２５）に連結させ、走行輪
（１）前進と同一方向回転の切削ロータリ刃（２６）正
転によって耕耘作業を行わせる一方、切削ロータリ刃
（２６）の逆転によって草刈作業を行わせる。【０００７】さらに、前記作業機（２４）の耕耘作業と
同時に畦立作業を行わせる後作業機（３０）を備え、ミ
ッションケース（２）後面の後ヒッチ（３１）にヒッチ
ピン（３２）を介して後作業機（３０）を着脱自在に設
けると共に、ヒッチピン（３２）回りに回転させて昇降
自在に後作業機（３０）を後ヒッチ（３１）に取付け、
昇降切換ピン（３３）の差し換えにより、後作業機（３
０）を下降着地させて畦立作業位置に支持させたり、ハ
ンドル台（４）後側に後作業機（３０）を持上げて非作
業位置に支持させる。また、前記エンジン（１１）後側
のハンドル台（４）に燃料タンク（３４）を設ける。【０００８】上記から明らかなように、走行輪（１）を
装設させるミッションケース（２）の後方斜上方に操向
ハンドル（５）を設ける歩行作業用の管理機において、
前記ミッションケース（２）上面の略水平面（１０）に
エンジン（１１）を載置させ、ミッションケース（２）
上面を従来エンジン台として兼用してエンジン（１１）
を装着し、エンジン（１１）とミッションケース（２）
によって形成する機体幅の縮少並びにエンジン（１１）
取付け構造のコスト低減及び軽量化などを図ると共に、
ミッションケース（２）後側を下方に突出させて下部に
車軸（３）を軸支させて走行輪（１）を設け、ミッショ
ンケース（２）前側に作業機（２４）駆動用のＰＴＯ軸
（２１）を軸支させ、ミッションケース（２）を側面視
で横向きＬ形またはＶ形に形成して両端部に車軸（３）
とＰＴＯ軸（２１）を離間させて配置し、ミッションケ
ース（２）の上下幅縮少及び軽量化並びに機体重心低下
などを行うと共に、ミッションケース（２）の小型化並
びに車軸（３）及びＰＴＯ軸（２１）の伝動スペースの
確保などを図る。【０００９】また、エンジン（１１）駆動力を伝えるミ
ッションケース（２）の入力軸（１８）前方にＰＴＯ軸
（２１）を設けて作業機（２４）に連結させると共に、
前記入力軸（１８）の下方に車軸（３）を設けて走行輪
（１）を軸支させ、入力軸（１８）を中心に車軸（３）
とＰＴＯ軸（２１）の伝動スペースを縦方向と横方向に
分けて形成し、ミッションケース（２）の小型化並びに
操向ハンドル（５）荷重の軽減などを図ると共に、ミッ
ションケース（２）後部の上下延設部（１９）に走行変
速機構（２０）を設け、ミッションケース（２）前部の
前後延設部（２８）にＰＴＯ変速機構（２９）を設け、
ミッションケース（２）の入力軸（１８）に対して低位
置に車軸（３）を設けて走行変速機構（２０）を配置
し、前記入力軸（１８）と略同一高さ位置にＰＴＯ軸
（２１）を設けてＰＴＯ変速機構（２９）を配置し、ミ
ッションケース（２）の小型化並びに前記各変速機構
（２０）（２９）の設置スペースの確保及び組立分解作
業性の向上などを図るもので、ミッションケース（２）
に設ける油圧変速機（１２）をエンジン（２）の下方に
配設させ、前記油圧変速機（１２）の下方に車軸（３）
を配設させ、上方のエンジン（１１）から中間の油圧変
速機（１２）を介して下方の車軸（３）に走行駆動力を
縦方向に伝達し、ミッションケース（２）及び油圧変速
機（１２）の取付け構造の小型化並びに車軸（３）を中
心とする前後左右方向の機体重量バランスの向上などを
図る。また、前記上下延設部（１９）を後方傾斜させる
後傾姿勢に形成し、上下延設部（１９）上部の油圧変速
機（１２）よりも車軸（３）を機体前方に配置させ、車
軸（３）の略直上にミッションケース（２）などの機体
重心を位置させ、車軸（３）を中心とする機体の重量の
前後バランスを平衡させ、操向ハンドル（５）操作荷重
を低減させると共に、機体の走行姿勢を安定させてい
る。【００１０】また、正逆転の切換によって耕耘作業と草
刈作業を行う切削ロータリ刃（２６）を作業機（２４）
に設け、切削ロータリ刃（２６）を正転または逆転させ
乍ら前進走行させ、切削ロータリ刃（２６）の正逆転切
換だけで同一の作業機（２４）によって耕耘と草刈を行
うと共に、適正耕耘深さと適正草刈高さを設定し、管理
作業範囲の拡大並びに取扱い操作性の向上などを図ると
共に、畦立などを行う後作業機（３０）を着脱自在に取
付ける後ヒッチ（３１）をミッションケース（２）後面
に設け、走行輪（１）の前方の作業機（２４）と後方の
後作業機（３０）とによって耕耘と畦立などの一連の作
業を行わせ、走行輪（１）の前方または後方に集中させ
て作業機（２４）（３０）を配備する不具合をなくし、
走行輪（１）を中心とする機体前後バランスの向上並び
に操向ハンドル（５）荷重の軽減などを図る。また、前
低後高にミッションケース（２）の上下延設部（１９）
を後傾させて下部に車軸（３）を設けかつ上部後面に後
ヒッチ（３１）を設けるから、ミッションケース（２）
下部後側に後作業機（３０）取付スペースを大きく形成
でき、またミッションケース（２）に対して後作業機
（３０）を接近させて前後機幅を縮少でき、かつ作業者
の歩行スペースも確保し易い。【００１１】さらに、平面視門形のゲージフレーム（３
５）両端部を作業機（２４）前方に突出させて左右ゲー
ジ輪（３６）を方向転換自在に取付け、前記ゲージフレ
ーム（３５）の門形中間部にフレーム台（３７）を固定
させ、ピン孔（３８）の差し換えによって調高範囲変更
自在に前記フレーム台（３７）を調高アーム（３９）に
固定させ、伝動ケース（２２）及びサイドフレーム（２
３）に支軸（４０）を介して調高アーム（３９）を前後
方向に回動自在に取付けると共に、前記伝動ケース（２
２）に固定させる受台（４１）に調高ハンドル（４２）
を回転自在に取付け、調高アーム（３９）に取付ける螺
着子（４３）に調高ハンドル（４２）のネジ（４４）を
螺着させ、調高ハンドル（４２）の回転操作によって支
軸（４０）回りにゲージフレーム（３５）を揺動させ、
ゲージ輪（３６）を下降させて作業機（２４）を草刈作
業位置に上昇支持させたり、ゲージ輪（３６）を上昇さ
せて作業機（２４）を耕耘作業位置に下降支持させる。【００１２】さらに、図４に示す如く、前記伝動ケース
（２２）とサイドフレーム（２３）に固定させるロータ
リカバー（２７）前側に前面カバー（４５）を備え、平
面視門形の前面カバー（４５）両端部を伝動ケース（２
２）及びサイドフレーム（２３）に支軸（４６）を介し
て回転自在に取付け、バネ（４７）によって前面カバー
（４５）を下降支持させると共に、前面カバー（４５）
に係合ピン（４８）を固定させ、前記ゲージフレーム
（３５）上面に上方から係合ピン（４８）を当接させ、
支軸（４０）回りにゲージフレーム（３５）を耕耘位置
に上昇させる動作によって前面カバー（４５）を上昇さ
せて退避させ、ゲージフレーム（３５）を草刈位置に下
降させる動作によって前面カバー（４５）を下降させて
ロータリカバー（２７）前側を遮閉させる。【００１３】また、前記ロータリ軸（２５）に爪台（４
９）を固定させ、爪台（４９）に支軸（５０）を介して
ロータリ刃（２６）を回転自在に軸支させ、ロータリ軸
（２５）回転時に遠心力によって放射線方向にロータリ
刃（２６）を突出させ、支軸（５０）回りの回転によっ
て衝撃を吸収させるロータリ刃（２６）の高速逆転によ
って草刈を行わせると共に、前記爪台（４９）に後退ス
トッパ（５１）を固定させ、ロータリ軸（２５）を正転
させて耕耘するとき、ロータリ刃（２６）を後退ストッ
パ（５１）に当接させ、耕耘抵抗に対してロータリ刃
（２６）を後傾姿勢で固定支持させ、後退ストッパ（５
１）を介して後退角を形成してロータリ刃（２６）を支
持させて耕耘抵抗を低減させ乍ら耕耘力（深さ）を確保
する。【００１４】上記から明らかなように、走行輪（１）を
装設させるミッションケース（２）の後方斜上方に操向
ハンドル（５）を設ける歩行作業用の管理機において、
前記ミッションケース（２）前部に伝動ケース（２２）
を介して作業機（２４）を取付け、作業機（２４）を高
さ調節操作する調高ハンドル（４２）を設け、作業機
（２４）対地高さをミッションケース（２）の前側で変
更させると共に、調高ハンドル（４２）操作によって作
業機（２４）を希望高さに支持し、作業機（２４）支持
構造の簡略化並びに作業機（２４）支持高さ調節操作性
の向上などを行う。【００１５】また、正逆転の切換によって耕耘作業と草
刈作業を行う切削ロータリ刃（２６）を作業機（２４）
に設け、切削ロータリ刃（２６）を正転または逆転させ
乍ら前進走行させ、切削ロータリ刃（２６）の正逆転切
換だけで同一の作業機（２４）によって耕耘と草刈を行
うと共に、適正耕耘高さと適正草刈高さを設定し、管理
作業範囲の拡大並びに取扱い操作性の向上などを図ると
共に、伝動ケース（２４）にゲージフレーム（３５）を
介してゲージ輪（３６）を昇降自在に設け、作業機（２
４）調高操作によってゲージ輪（３６）を昇降させ、走
行輪（１）とゲージ輪（３６）の間に伝動ケース（２
２）とゲージフレーム（３５）を介して作業機（２４）
を支持させ、作業機（２４）の伝動構造及び支持高さ構
造の簡略化を行うと共に、例えば高速回転が必要で小石
などが飛散し易い草刈と低速回転で行う耕耘の両方に兼
用可能な機体の軽量小型化などを図る。【００１６】また、作業機（２４）前側に前面カバー
（４５）を昇降自在に設け、ゲージフレーム（３５）昇
降動作によって前面カバー（４５）を昇降させ、例えば
作業機（２４）を下降させる耕耘作業時に不要な前面カ
バー（４５）が上昇し、また作業機（２４）を上昇させ
る草刈作業時に前面カバー（４５）を下降させて草また
は小石などの飛散を防止し、作業内容の変更によって前
面カバー（４５）を昇降させる手間を省き、取扱い操作
性の向上などを図ると共に、最下降位置の伝動ケース
（２２）に最上昇位置のゲージフレーム（３５）を当接
させ、ゲージフレーム（３５）のストッパとして高剛性
の伝動ケース（２２）を兼用し、作業機（２４）を最下
降させて行う深耕作業を安定良く行い、耕耘によって大
きな転動反力が生じても上方からの押付け力を大きくし
て対応でき、ゲージフレーム（３５）支持構造の簡略化
並びに耕耘作業性の向上などを図る。【００１７】さらに、図８に示す如く、前記油圧変速機
（１２）の変速出力軸（５２）に、高低速切換ギヤ（５
３）と走行駆動チェン（５４）とボールデフ機構（５
５）とで形成する前記走行変速機構（２０）を介して、
左右の車軸（３）を連結させ、左右の走行輪（１）を前
進駆動させると共に、前記入力軸（１８）に連結させる
ＰＴＯ入力チェン（５６）に爪クラッチ（５７）を介し
ブレーキ板（５８）を係脱自在に連結させ、ブレーキ板
（５８）をＰＴＯ変速軸（５９）に摺動自在に係合軸支
させ、高速逆転ギヤ（６０）と低速正転チェン（６１）
と正逆転切換爪クラッチ（６２）を介してＰＴＯ変速軸
（５９）に前記ＰＴＯ軸（２１）を連結させ、前記ＰＴ
Ｏ変速機構（２９）を形成し、伝動ケース（２２）の伝
動チェン（６３）を介してＰＴＯ軸（２１）にロータリ
軸（２５）を連結させ、ロータリ刃（２６）を低速で正
転させて耕耘作業を行う一方、ロータリ刃（２６）を高
速で逆転させて草刈作業を行う。【００１８】さらに、前記ＰＴＯ軸（２１）に加圧板
（６４）を係合軸支させ、前記爪クラッチ（５７）を切
ったときにこの切操作によってブレーキ板（５８）を加
圧板（６４）に圧接させ、ＰＴＯ変速軸（５９）との摩
擦連結によってＰＴＯ軸（２１）を制動してロータリ刃
（２６）の慣性力による回転を減速させる。また、前記
無段変速機（１２）の変速切換並びに高低速切換ギヤ
（５３）の各操作を変速レバー（６）によって行い、テ
ンションクラッチ（１３）の入切操作をクラッチレバー
（７）によって行うと共に、爪クラッチ（５７）の係脱
と正逆転切換爪クラッチ（６２）の係脱の各操作をＰＴ
Ｏレバー（８）によって行い、走行輪（１）と作業機
（２４）側にエンジン（１１）動力を各別に伝えて駆動
し、耕耘作業時にロータリ刃（２６）を回転させて一定
の耕深を確保した後、走行輪（１）を駆動して前進させ
ることにより、耕耘開始時の急発進（ダッシュ走行）を
防ぎ、耕深が浅くなるのを防止できる。【００１９】さらに、図９に示す如く、前記後退ストッ
パ（５１）を筒形に形成し、正転と逆転の両方でロータ
リ刃（２６）をストッパ（５１）に当接させ、遠心力に
よるロータリ刃（２６）の固定が不完全になる低速での
逆転によって草刈を行わせると共に、草刈の回転を低速
にすることによって耕耘との切換えを容易に行える。【００２０】さらに、図１０に示す如く、前記作業機
（２４）の左右幅中央に伝動ケース（２２）を配置さ
せ、ロータリ軸（２５）の中央に駆動力を伝えて左右の
ロータリ刃（２６）を回転させるもので、サイドフレー
ム（２３）を省いたり、伝動ケース（２２）をミッショ
ンケース（２）によって一体形成し、作業機（２４）の
コンパクト化並びに構成部品数の低減並びに軽量化など
を図ることができる。【００２１】【発明の効果】以上実施例から明らかなように本発明
は、走行輪（１）を装設させるミッションケース（２）
に作業機を装設させ、かつミッションケース（２）の後
方に操向ハンドル（５）を連結させ、前記ミッションケ
ース（２）にエンジン（１１）を載置させ、エンジン
（１１）の駆動力を伝えて走行輪を駆動させる管理機に
おいて、ミッションケース（２）上面にエンジン（１
１）を固定させ、エンジン（１１）の駆動力を上方から
下方に伝えて走行輪（１）を駆動させると共に、ミッシ
ョンケース（２）前側に伝動ケース（２２）を固定さ
せ、伝動ケース（２２）にロータリ軸（２５）を軸支さ
せるもので、機体重量バランスの向上を容易に図ること
ができるものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking-type management machine for performing, for example, medium tilling or tilling work. Conventionally, there is a technique of performing a walking operation by providing a steering handle at a diagonally upper rear side of a transmission case on which a traveling wheel is mounted. However, an engine base is mounted on the transmission case. The structure in which the engine is mounted has a problem that it is not possible to easily reduce the weight and the manufacturing cost by omitting the engine stand. [0003] Accordingly, the present invention provides a work case mounted on a transmission case in which a traveling wheel is mounted,
And a steering handle connecting of the rear of the mission-case
So, to placing the engine into the transmission case, the management machine odor to drive the traveling wheels convey the driving force of the engine
And fix the engine on the top of the transmission case.
Gin's driving force is transmitted from above to below to drive the running wheels
And the transmission case is fixed in front of the transmission case.
In addition, the rotary shaft is supported by the transmission case, so that the weight balance of the machine body can be easily improved. Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 to 7, a pair of left and right running wheels (1) are mounted on a transmission case (2) via an axle (3), and a lower portion of a handle stand (4) is fixed to the rear of the transmission case (2). And the steering handle (5) is connected to the upper part of the handle base (4), and the transmission case (2)
A steering handle (5) is provided diagonally rearward and upward, and a shift lever (6), a clutch lever (7), a PTO lever (8), and the like are attached to an operating portion (9) of the steering handle (5), and the transmission Case (2) A substantially horizontal surface (1
0) the engine (11) is mounted thereon and fixed, and the hydraulic transmission (12) for continuously changing the output of the engine (11) is fixed to the rear side surface of the transmission case (2). Belt to be stretched (14)
And the engine (11) via the pulleys (15) and (16)
Of the hydraulic transmission (12) to the output shaft (1) of the hydraulic transmission (12).
8) is connected. The transmission case (2) is formed in an L-shape when viewed from the side, the rear side is projected downward, and an axle (3) is pivotally supported at the lower rear part of the transmission case (2). 2) A traveling speed change mechanism (20) is provided in the rear vertically extending portion (19), and the input shaft (1) is provided almost directly above the axle (3).
8) is arranged, and the output shaft (1) is located almost immediately above the input shaft (18).
7), a hydraulic transmission (12) is disposed below the engine (11), and an axle (3) is disposed below the hydraulic transmission (12). The driving force is transmitted from above to below to drive the traveling wheel (1). Further, the transmission case (2) has a front side protruding forward so that a PTO shaft (21) is pivotally supported at the front, and the transmission case (22) and the side frame (23) are connected to the front of the transmission case (2). To the transmission case (2
2) and the working machine (2) via the side frame (23).
4), and a work machine (2) is provided in front of the transmission case (2).
4), the transmission case (22) and the side frame (23) are rotatably supported at both ends of a rotary shaft (25), and a plurality of cutting rotary blades (26) used for tilling and mowing. ) Is attached to a rotary shaft (25), and the upper surface and left and right sides of each cutting rotary blade (26) are closed by a rotary cover (27) to constitute the working machine (24). In addition, a PTO transmission mechanism (29) is provided in a front-rear extension portion (28) in front of the transmission case (2), and a PTO shaft (21) is provided in front of the input shaft (18) to provide a working machine (24). It is connected to the rotary shaft (25), and the cutting wheel (26) rotates in the same direction as the traveling wheel (1) in the forward direction to perform the tilling work by the forward rotation, and the mowing work is performed by the reverse rotation of the cutting rotary blade (26). . Further, a post-working machine (30) is provided for performing the ridge work at the same time as the tilling work of the working machine (24), and a hitch pin (32) is provided on a rear hitch (31) on the rear surface of the transmission case (2). And a post-working machine (30) is detachably provided, and the post-working machine (30) is attached to the rear hitch (31) by rotating around a hitch pin (32) so as to be able to move up and down freely.
By replacing the lifting / lowering switching pin (33), the post-working machine (3
0) is lowered and landed to support the ridge work position, or the rear work machine (30) is lifted to the rear side of the handle stand (4) to be supported at the non-work position. Further, a fuel tank (34) is provided on the handlebar (4) on the rear side of the engine (11). As is apparent from the above description, in a walking operation management machine in which a steering handle (5) is provided diagonally behind and above a transmission case (2) on which a traveling wheel (1) is mounted,
The engine (11) is mounted on a substantially horizontal surface (10) on the upper surface of the transmission case (2), and the transmission case (2)
Engine (11) with upper surface also used as conventional engine stand
With engine (11) and transmission case (2)
Of the body width formed by the engine and the engine (11)
While reducing the cost and weight of the mounting structure,
A transmission wheel (1) is provided by projecting a rear side of a transmission case (2) downward and supporting an axle (3) at a lower portion, and a PTO shaft for driving a work implement (24) is provided on a front side of the transmission case (2). 21), the transmission case (2) is formed in a lateral L-shape or V-shape in side view, and axles (3) are provided at both ends.
And the PTO shaft (21) are separated from each other to reduce the vertical width and weight of the transmission case (2) and to reduce the body weight, etc., to reduce the size of the transmission case (2) and to reduce the axle (3) and the PTO. The transmission space for the shaft (21) is secured. A PTO shaft (21) is provided in front of the input shaft (18) of the transmission case (2) for transmitting the driving force of the engine (11), and is connected to the working machine (24).
An axle (3) is provided below the input shaft (18) to support the traveling wheel (1), and the axle (3) is centered on the input shaft (18).
The transmission space of the PTO shaft and the PTO shaft (21) is formed separately in the vertical and horizontal directions to reduce the size of the transmission case (2) and reduce the load on the steering handle (5). The transmission transmission mechanism (20) is provided in the vertically extending portion (19) of the vehicle, and the PTO transmission mechanism (29) is provided in the front-rear extension portion (28) at the front of the transmission case (2).
An axle (3) is provided at a lower position with respect to the input shaft (18) of the transmission case (2), and a traveling speed change mechanism (20) is arranged. The PTO shaft () is located at substantially the same height as the input shaft (18). 21), a PTO transmission mechanism (29) is arranged to reduce the size of the transmission case (2), secure installation space for the transmission mechanisms (20), (29), and improve the workability of assembling and disassembling. And the mission case (2)
The hydraulic transmission (12) provided in the vehicle is disposed below the engine (2), and the axle (3) is disposed below the hydraulic transmission (12).
, The traveling driving force is transmitted in a vertical direction from the upper engine (11) to the lower axle (3) via the intermediate hydraulic transmission (12), and the transmission case (2) and the hydraulic transmission ( The mounting structure of 12) is downsized, and the weight balance of the body in the front-rear and left-right directions around the axle (3) is improved. Further, the vertically extending portion (19) is formed to have a rearwardly inclined posture for inclining backward, and the axle (3) is disposed forward of the hydraulic transmission (12) above the vertically extending portion (19). The body weight center of the transmission case (2) and the like is positioned almost directly above (3), the front-rear balance of the weight of the body around the axle (3) is balanced, and the steering handle (5) reduces the operation load and , Stabilizes the running posture of the aircraft. In addition, a cutting rotary blade (26) for performing a tilling operation and a mowing operation by switching between forward and reverse rotation is provided with a working machine (24).
, The cutting rotary blade (26) is driven forward or reverse to move forward, and only by switching the cutting rotary blade (26) between forward and reverse, the same working machine (24) performs plowing and mowing, and proper tilling. Set the depth and appropriate mowing height to expand the management work range and improve handling operability, etc. At the same time, attach the detachable work machine (30) to perform ridge erecting, etc. (2) Provided on the rear surface, a work machine (24) in front of the running wheel (1) and a rear working machine (30) behind perform a series of operations such as tilling and ridges, and Eliminates the problem of deploying the work machines (24) (30) concentrated forward or backward,
It is intended to improve the front-rear balance of the aircraft centering on the running wheels (1) and to reduce the load on the steering wheel (5). The transmission case (2) has a vertically extending portion (19)
Is tilted rearward to provide the axle (3) at the lower part and the rear hitch (31) at the upper rear surface, so that the transmission case (2)
A large space for attaching the rear work machine (30) can be formed on the lower rear side, and the width of the front and rear machine can be reduced by bringing the rear work machine (30) closer to the transmission case (2), and a walking space for the worker. Is also easy to secure. Further, a gate frame (3
5) Left and right gauge wheels (36) are attached to the work machine (24) so as to be able to change their direction by projecting both ends forward, and a frame base (37) is fixed to the gate-shaped intermediate portion of the gauge frame (35). The frame base (37) is fixed to the adjusting arm (39) so that the adjusting range can be changed freely by replacing the hole (38), and the transmission case (22) and the side frame (2) are fixed.
3) A height adjusting arm (39) is attached to the transmission case (2) via a support shaft (40) so as to be rotatable in the front-rear direction.
Adjusting handle (42) on cradle (41) to be fixed to 2)
Is rotatably mounted, and a screw (44) of a height adjustment handle (42) is screwed into a screw (43) mounted on the height adjustment arm (39), and the spindle () is rotated by rotating the height adjustment handle (42). 40) Swing the gauge frame (35) around,
The gauge wheel (36) is lowered to support the working machine (24) at the mowing work position, or the gauge wheel (36) is raised to support the working machine (24) at the tilling work position. Further, as shown in FIG. 4, a front cover (45) is provided on the front side of the rotary cover (27) fixed to the transmission case (22) and the side frame (23). ) Attach both ends to the transmission case (2
2) It is rotatably attached to the side frame (23) via the support shaft (46), and the front cover (45) is supported by the spring (47) to descend and the front cover (45).
, An engagement pin (48) is fixed to the gauge frame (35), and the engagement pin (48) is brought into contact with the upper surface of the gauge frame (35) from above.
The front cover (45) is raised and retracted by the operation of raising the gauge frame (35) to the tilling position around the support shaft (40), and the front cover (45) is moved by the operation of lowering the gauge frame (35) to the mowing position. Is lowered to close the front side of the rotary cover (27). [0013] Further, a pawl (4) is attached to the rotary shaft (25).
9) is fixed, and the rotary blade (26) is rotatably supported on the claw base (49) via the support shaft (50). When the rotary shaft (25) rotates, the rotary blade (26) is radially rotated by centrifugal force. ) Is protruded and mowing is performed by high-speed reversal of a rotary blade (26) that absorbs an impact by rotation about a support shaft (50), and a retraction stopper (51) is fixed to the claw base (49). When the shaft (25) is rotated forward for tilling, the rotary blade (26) is brought into contact with the retraction stopper (51), and the rotary blade (26) is fixedly supported in a tilting posture against the tilling resistance. (5
The swivel angle is formed through 1) to support the rotary blade (26) to reduce the tillage resistance and secure the tillage force (depth). As is apparent from the above description, in a walking operation management machine in which a steering handle (5) is provided diagonally behind and above a transmission case (2) on which a traveling wheel (1) is mounted,
A transmission case (22) at the front of the transmission case (2)
The work machine (24) is attached via the, the height adjustment handle (42) for adjusting the height of the work machine (24) is provided, and the height of the work machine (24) above the ground is changed on the front side of the transmission case (2). At the same time, the working machine (24) is supported at a desired height by operating the height adjustment handle (42) to simplify the support structure of the working machine (24) and improve the operability of adjusting the working height of the working machine (24). . A cutting rotary blade (26) for performing a tilling operation and a mowing operation by switching between forward and reverse rotation is provided with a working machine (24).
, The cutting rotary blade (26) is driven forward or reverse to move forward, and only by switching the cutting rotary blade (26) between forward and reverse, the same working machine (24) performs plowing and mowing, and proper tilling. Setting the height and appropriate mowing height to expand the management work range and improve handling operability, etc., and install a gauge wheel (36) in the transmission case (24) via a gauge frame (35) so as to be able to move up and down. , Work machine (2
4) The gauge wheel (36) is raised and lowered by the height adjustment operation, and the transmission case (2) is moved between the traveling wheel (1) and the gauge wheel (36).
2) and the working machine (24) via the gauge frame (35)
And a simplification of the transmission structure and the supporting height structure of the working machine (24), and also an airframe that can be used for both mowing, which requires high-speed rotation and pebbles are easily scattered, and tilling performed at low-speed rotation To reduce weight and size. A front cover (45) is provided on the front side of the work machine (24) so as to be able to move up and down, and the front cover (45) is moved up and down by a raising and lowering operation of the gauge frame (35). Unnecessary front cover (45) rises during work, and also raises work machine (24). During mowing work, front cover (45) is lowered to prevent scattering of grass or pebbles. The effort of raising and lowering the cover (45) is omitted, the handling operability is improved, and the transmission frame (22) at the lowermost position is brought into contact with the gauge frame (35) at the uppermost position. The high-rigidity transmission case (22) is also used as a stopper, and the deep tilling work performed by lowering the work machine (24) at the lowest level is performed stably. To increase the pressing force from above could adapt, gauge frame (35) achieving such simplification and tilling improvement of the support structure. Further, as shown in FIG. 8, a high-low switching gear (5) is connected to a shift output shaft (52) of the hydraulic transmission (12).
3), traveling drive chain (54) and ball differential mechanism (5)
5) via the traveling speed change mechanism (20) formed by
The left and right axles (3) are connected, the left and right running wheels (1) are driven forward, and the PTO input chain (56) connected to the input shaft (18) is connected to the brake plate (58) via the pawl clutch (57). ) Is releasably connected, the brake plate (58) is slidably engaged with the PTO transmission shaft (59), and the high-speed reverse gear (60) and the low-speed normal rotation chain (61).
And the PTO shaft (21) is connected to the PTO transmission shaft (59) via the forward / reverse switching claw clutch (62).
An O transmission mechanism (29) is formed, the rotary shaft (25) is connected to the PTO shaft (21) via the transmission chain (63) of the transmission case (22), and the rotary blade (26) is rotated forward at low speed. While performing the tillage work, the mowing work is performed by reversing the rotary blade (26) at high speed. Further, a pressure plate (64) is engaged and supported on the PTO shaft (21), and when the pawl clutch (57) is disengaged, the brake plate (58) is disengaged by this disengagement operation. , And the PTO shaft (21) is braked by frictional connection with the PTO transmission shaft (59) to reduce the rotation of the rotary blade (26) due to inertial force. Further, the speed change of the continuously variable transmission (12) and the operation of the high / low speed switching gear (53) are performed by a speed change lever (6), and the on / off operation of the tension clutch (13) is performed by a clutch lever (7). At the same time, the operations of engaging and disengaging the claw clutch (57) and engaging and disengaging the forward / reverse switching claw clutch (62) are performed by PT.
O-lever (8) is used to transmit the power of the engine (11) to the traveling wheel (1) and the work implement (24) side by side, and the rotary blade (26) is rotated during the tilling operation to maintain a constant cultivation depth. Then, by driving the traveling wheel (1) to move forward, a sudden start (dash traveling) at the start of tillage can be prevented, and the plowing depth can be prevented from becoming shallow. Further, as shown in FIG. 9, the retraction stopper (51) is formed in a cylindrical shape, and the rotary blade (26) is brought into contact with the stopper (51) in both normal rotation and reverse rotation, and the rotary blade is rotated by centrifugal force. The mowing is performed by the reversal at a low speed at which the fixing of the blade (26) is incomplete, and the switching to the tilling can be easily performed by reducing the rotation of the mowing at a low speed. Further, as shown in FIG. 10, a transmission case (22) is arranged at the center of the left and right widths of the working machine (24), and the driving force is transmitted to the center of the rotary shaft (25) to transmit the left and right rotary blades (26). ), The side frame (23) is omitted, the transmission case (22) is integrally formed with the transmission case (2), and the working machine (24) is made compact, the number of components is reduced, and the weight is reduced. Can be achieved. As is apparent from the above embodiments, the present invention provides a transmission case (2) for mounting a traveling wheel (1).
Is So設working machine and rearwardly to connect the steering handle (5) of the transmission case (2), is placed on the engine (11) to said transmission case (2), the driving of the engine (11) A management machine that transmits power and drives the running wheels
In addition, the engine (1
1) is fixed, and the driving force of the engine (11) is increased from above.
Drive down the running wheel (1)
The transmission case (22) is fixed to the front side of the transmission case (2).
And a rotary shaft (25) is supported on the transmission case (22).
Therefore, the weight balance of the machine can be easily improved.

【図面の簡単な説明】【図１】全体の側面図。【図２】前部側面図。【図３】後部側面図。【図４】作業機側面図。【図５】全体の平面図。【図６】前部平面図。【図７】後部平面図。【図８】駆動説明図。【図９】図５の変形例を示す側面図。【図１０】図８の変形例を示す説明図。【符号の説明】（１）走行輪（２）ミッションケース（４）ハンドル台（５）操向ハンドル（１０）略水平面（１１）エンジン（１７）エンジンの出力軸（１８）ミッションケースの入力軸[Brief description of the drawings] FIG. 1 is an overall side view. FIG. 2 is a front side view. FIG. 3 is a rear side view. FIG. 4 is a side view of the working machine. FIG. 5 is an overall plan view. FIG. 6 is a front plan view. FIG. 7 is a rear plan view. FIG. 8 is a drive explanatory diagram. FIG. 9 is a side view showing a modification of FIG. 5; FIG. 10 is an explanatory view showing a modification of FIG. 8; [Explanation of symbols] (1) Running wheel (2) Mission case (4) Handle base (5) Steering handle (10) Substantially horizontal surface (11) Engine (17) Output shaft of engine (18) Mission case input shaft

───────────────────────────────────────────────────── フロントページの続き (56)参考文献実開昭57−151128（ＪＰ，Ｕ) 実開平２−65616（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) B62D 51/06 B60K 5/04 A01B 33/02 A01B 39/18 B60K 25/02 ──────────────────────────────────────────────────続き Continuation of the front page (56) References JP-A-57-151128 (JP, U) JP-A-2-65616 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 51/06 B60K 5/04 A01B 33/02 A01B 39/18 B60K 25/02

Claims

(57) Patent Claims 1. A running wheel (1) is So設work machine transmission case (2) to So設the and mission-case (2) behind the steering handle (5 ) is connected to, it is placed on the engine (11) to said transmission case (2),
A management machine that transmits the driving force of the engine to drive the running wheels
In addition, the engine (1
1) is fixed, and the driving force of the engine (11) is increased from above.
Drive down the running wheel (1)
The transmission case (22) is fixed to the front side of the transmission case (2).
And the rotary shaft (25) is supported on the transmission case (22).
Tiller for causing.