JP3578861B2 - Tilling rotary work machine - Google Patents

Tilling rotary work machine Download PDF

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Publication number
JP3578861B2
JP3578861B2 JP03288496A JP3288496A JP3578861B2 JP 3578861 B2 JP3578861 B2 JP 3578861B2 JP 03288496 A JP03288496 A JP 03288496A JP 3288496 A JP3288496 A JP 3288496A JP 3578861 B2 JP3578861 B2 JP 3578861B2
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Japan
Prior art keywords
engine
work machine
lifting
rotary
load
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JP03288496A
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Japanese (ja)
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JPH09201107A (en
Inventor
野 隆 司 平
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Yanma Agricultural Equipment Co Ltd
Yanmar Co Ltd
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Yanma Agricultural Equipment Co Ltd
Yanmar Co Ltd
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  • Lifting Devices For Agricultural Implements (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Soil Working Implements (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は例えば走行車の後部に耕耘ロータリ作業機を装備させて耕耘作業などを行うようにした耕耘ロータリ作業機に関する。
【0002】
【発明が解決しようとする課題】
この種耕耘ロータリ作業機にあってロータリカバーの取付位置が固定の場合、作業機を持上げて機体を旋回するときロータリカバーの最下端部と地面との間隙も拡大して、旋回開始直後などのロータリの回転によって後方に土や石が飛散するときには前記間隙よりカバー外側に土や石が飛び出る状態となる。また、従来技術として、特公平7−67409号公報に示すように、耕深制御と耕耘ロータリカバーの前後移動を組み合わせたものはあるが、本課題を解消するものではなかった。
【0003】
【課題を解決するための手段】
然るに、本発明は、走行車に装備する耕耘ロータリ作業機の昇降を行う昇降操作手段と、耕耘ロータリカバーを前後に移動させるカバー移動制御手段とを備え、前記昇降操作手段によるロータリ作業機の昇降動作に連動してロータリカバー位置を前後に移動制御すると共に、エンジンの出力制御を行うエンジン出力制御手段を備え、昇降操作手段による作業機の上昇操作に連動してエンジン回転数を低回転設定値まで低減させる耕耘ロータリ作業機において、設定エンジン回転数を維持させながら走行を行う電子ガバナコントローラから得られるエンジン負荷の基準値を設定する負荷設定器と、作業機を昇降させる昇降バルブと、作業機を昇降操作する昇降操作手段によるワンタッチ昇降のオンオフを行うワンタッチ入切スイッチとを備え、電子ガバナコントローラから得られるエンジンの負荷変化に基づいて昇降バルブを自動制御し、作業機の走行車に対する支持高さを可変させ耕耘深さを変化させると共に、前記昇降操作手段の昇降操作に連動してロータリカバーを前後方向に回動させてリヤカバーを上下方向に移動変化させ、エンジン負荷の変化に基づいて作業機を昇降させてエンジン負荷を一定に制御する負荷制御を行わせる一方、昇降操作手段による作業機の上げ・下げ操作によってエンジンの回転数及び出力トルク特性を変更するエンジン出力制御を行わせるもので、耕耘終り(旋回始め)時、耕耘始め(旋回終り)時耕耘精度を向上させ、作業性や耕耘精度向上させるものである。
【0005】
【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は制御回路図、図2は全体の側面図、図3は同平面図であり、図中(1)は前後車輪(2)(3)を有する走行車であるトラクタで、運転キャビン(4)内の運転席(5)前方に操向ハンドル(6)を備え、該ハンドル(6)操作によって前輪(2)を方向転換させて車体の操向を行うように構成している。
【0006】
図4にも示す如く、トラクタ(1)に3点リンク機構(7)を介してサイドドライブ型の耕耘ロータリ作業機(8)を昇降自在に装着させるもので、中央にギアボックス(9)を配置し、ユニバーサルジョイント付ドライブ軸を介してトラクタ(1)のPTO軸に入力軸(10)を連結して耕耘駆動力をギアボックス(9)に入力させている。
【0007】
また、前記ギアボックス(9)側面より両側方にメインフレームであるビーム(11)を突出し、該ビーム(11)のそれぞれの中途部に支持プレート(12)を固設し、該支持プレート(12)の前端には3点リンク機構(7)のロワリンク(13)を枢結するピン(14)を突設し、後端にはデプスフレーム(15)の前端を枢支すると共に、ギヤボックス(9)上方のマスト(16)前端に3点リンク機構(7)のトップリンク(17)後端を連結させている。
【0008】
さらに、前記ビーム(11)の左外側端にチェンケース(18)上部を固設し、該チェンケース(18)下部に耕耘爪軸(19)を横架し、該耕耘爪軸(19)上にナタ爪よりなる多数の耕耘爪(20)…を側面視で放射状に植設させると共に、該耕耘爪(20)の回転軌跡上方をロータリカバー(21)によって覆い、両側をサイドカバー(22)によって覆っている。そして、該耕耘爪軸(19)はギアボックス(9)内のギア、ビーム(11)内の伝動軸、チェンケース(18)内のスプロケット及びチェンを介して駆動し、耕耘爪(20)…を回転させることによって耕耘を行うようにしている。
【0009】
またさらに、前記ビーム(11)の左右両端前方に第1プレート(23)を固設し、該プレート(23)前端にボルト(24)及び第2プレート(25)を介してパイプ製の支持杆(25)を横架させ、該パイプ製支持杆(26)に回動軸(27)を回転自在に内挿させて二重軸構造に形成すると共に、前記回動軸(27)の第2プレート(25)を挾んだ左右両側の固定取付板(28)に、ボルト(29)を介しバネ鋼製の切断刃(30)を取外し自在に固定させて、切断刃(30)の先端刃先部を土中に突入させている。そして前記第2プレート(25)と固定取付板(28)間に切断刃昇降用の電動式昇降シリンダ(電動モータ)(31)を介設するもので、前記第2プレート(25)の固定ブラケット(32)に枢軸(33)を介し電動シリンダ(31)を支持させると共に、電動シリンダ(31)のロッド(34)先端を枢軸(35)を介し固定取付板(28)に連結させて、昇降シリンダ(31)の伸縮動作でもって回動軸(27)を中心として切断刃(30)を上下揺動させて、切断刃(30)の突入深さを適宜変化させるように構成している。
【0010】
前記切断刃(30)は上側を略直線部(30a)に、下側を湾曲部(30b)に形成し、前高後低状に傾斜させて、耕耘爪(20)の回転軌跡(A)の前部内に湾曲部(30b)を側面視でオーバラップするように臨ませ、耕耘爪(20)の土中突入地点に切断刃(30)の土中突入地点を略一致させ、耕耘爪(20)の土壌切断時に切断刃(30)によって土壌を切り込む状態とさせて、この切り込んだ土を耕耘爪(20)によって容易に耕耘して、この耕耘作業での負荷の低減化を図るように構成している。また前記切断刃(30)は、耕耘ロータリ(36)が浮上がってダッシュ状態となるような硬質土条件では切断刃(30)の土中突入長さを大に調節してロータリ(36)の浮上りを防止する一方、圃場面やトラクタ姿勢の変化によって耕耘負荷が変化しエンジン負荷も大となるときその突入長さを小に調節してエンジン負荷を安定維持させるように構成している。
【0011】
さらに、前記耕耘爪(20)は切り込んでから土を反転させるために先端部を右または左に交互に一定巾(略80mm)湾曲させて弾性を有する構成とし、180°対向位置の耕耘爪(20)の湾曲方向を右または左方向に同一とするように爪軸(19)の同一断面に取付けられた4本のホルダー(37)に4本(爪軸(19)1回転当りの爪本数同一方向に2本)の耕耘爪(20)を装着させている。そして耕耘爪(20)の回転半径(a)を略245mm程度とし、対向関係にある隣接の耕耘爪(20)(20)の基部間隔(T)を大きな間隙の5とするのに対し、先端爪軌跡(L)の間隙である間隔(t)を略1(T:t≒5:1)(T≒200mm、t≒40mm)の割合に設けて、基部間隔(T)を大とさせ耕耘爪(20)の取付本数を減少させることによって、所要動力の低減化を図って、同一動力での耕耘時余力分を速度に回して高速(従来の略2倍)耕耘を可能とさせるように構成したものである。
【0012】
図1、図6に示す如く、エンジン(38)の燃料噴射ポンプ(39)の燃料噴射量を電子ガバナ(40)によって調節するラックソレノイドである燃料噴射ソレノイド(41)を備えるもので、ラック位置より燃料噴射量を検出する電子ガバナ(40)のラック位置センサ(42)と、エンジン(38)の回転数を検出するピックアップ型回転センサ(43)と、作業者が操作するアクセルレバー(44)またはペダル(45)の操作量を検出するポテンショメータ型アクセルセンサ(46)とを備え、エンジン出力制御手段である電子ガバナ(40)のガバナコントローラ(47)にこれらソレノイド(41)・各センサ(42)(43)(46)を接続させて、アクセルレバー(43)またはペダル(44)で設定されるエンジン回転数に電子ガバナ(40)で燃料噴射量を調節して、設定エンジン回転数を維持させながら走行を行うように構成している。
【0013】
また電子ガバナコントローラ(47)から得られるエンジン(38)の負荷率(ラック位置の変化率)の基準値を設定する負荷率設定器(48)と、作業機(8)を昇降させる油圧昇降シリンダの電磁式昇降バルブ(49)と、作業機(8)を昇降操作する昇降操作手段であるワンタッチ操作式昇降スイッチ(50)と、このスイッチ(50)によるワンタッチ昇降のオン・オフ(入・切)を行うワンタッチ入切スイッチ(51)と、前記ロータリカバー(21)を耕耘爪軸(19)を中心として前後方向に回動させるロータリカバー移動制御手段である回動モータ(回動シリンダ)(52)とを備え、電子ガバナコントローラ(47)に接続させる耕耘コントローラ(53)に、これら設定器(48)・バルブ(49)・各スイッチ(50)(51)・モータ(52)を接続させて、電子ガバナコントローラ(47)から得られるエンジン(38)の負荷率の変化に基づいて昇降バルブ(49)を自動制御して、作業機(8)のトラクタ(1)に対する支持高さを可変させ耕耘深さを変化させて、エンジン(38)の負荷率を略一定に維持させた状態で作業を行うように構成する一方、前記昇降スイッチ(50)の昇降操作に連動してロータリカバー(52)を前後方向に回動させて、該カバーの後方に連設するリヤカバー(54)を上下方向に移動変化させるように構成している。
【0014】
本実施例は上記の如く構成するものにして、従来例えば爪軸(19)1回転当りの爪本数を1本で、爪軸回転数略170rpm、車速0.5m/sの作業条件で行われる耕耘作業を、爪軸(19)1回転当りの爪本数を2本として、爪軸回転数略170rpm、車速1〜1.5m/sの作業条件で行うもので、走行速度を従来の略2倍以上に高速化させて、作業能率を大巾に向上させるものである。
【0015】
そして作業中にあっては、エンジン(38)負荷の変化に基づいて作業機(8)を昇降させてエンジン(38)負荷を一定に制御する負荷制御が行われる一方、昇降スイッチ(50)による作業機(8)の上げ・下げ操作時には、エンジン(38)の回転数及び出力トルク特性を変更するエンジン出力制御が行われるもので、以下図9のフローチャート、図10のルーチン、図11乃至図12のトルク特性図を参照してこの作用を説明する。
【0016】
通常エンジン(38)の回転は、アクセルセンサ(46)で検出される設定のエンジン回転数(N2)に対し、回転センサ(43)で検出される実際のエンジン回転数(N1)を等しく(N2=N1)するように電子ガバナ(40)で制御が行われているもので、斯る回転制御中、ワンタッチ入切スイッチ(51)のオンで、昇降スイッチ(50)を上げ操作するとき、図12に示す如くエンジン(38)の回転数を1500rpmを設定値とする回転数まで低減させると共に、この1500rpm時を最大トルクとする低回転トルク特性にエンジン出力を切換えて、旋回作業時などには走行速度を自動的に減速させ、しかも旋回に必要なトルクは確保した良好な作業を可能とさせるものである。
【0017】
そして旋回後などで昇降スイッチ(50)を下げ操作するとき、図11に示す如くエンジン(38)の回転数をアクセルで設定される2500rpmのエンジン回転数まで増大させると共に、この2500rpm時を最大トルクとする通常の作業トルク特性にエンジン出力を切換えて、作業に必要な所定の走行速度で、この速度時最大トルクを確保して、効率良好な高速耕耘作業を可能とさせるものである。
【0018】
またこのような昇降スイッチ(50)によるエンジン回転数の増減及びエンジントルク特性の切換時にあっては、前記ロータリカバー(21)も同時に移動変化するもので、図7に示す如く昇降スイッチ(50)の下げ操作によって作業機(8)が通常の作業位置まで下降状態のとき、回動モータ(52)はピストンロッド(52a)を最短に縮小させて、耕耘爪軸(19)を中心としてロータリカバー(21)を前回動させ、リヤカバー(54)を上移動させる状態とさせて、リヤカバー(54)の最下端部で耕耘面を均平とさせる一方、昇降スイッチ(50)の上げ操作によって作業機(8)を上昇させ旋回作業などを行う時、回動モータ(52)はピストンロッド(52a)を最長に伸張させて、耕耘爪軸(19)を中心としてロータリカバー(21)を後回動させ、リヤカバー(54)を下移動させる状態とさせて、リヤカバー(54)の最下端部と地面との間に形成される間隙(C)を縮小させて、ロータリ(36)の回転によって土や石などが後方に飛散するときにもこの間隙(C)よりのカバー(54)外側への飛び出しを最大抑制させた良好な旋回作業などを可能とさせるものである。このように旋回作業時にロータリカバー(21)を後回動させる結果、耕耘終り(旋回始め)における土のカバー(21)外側への飛散など移動を最小にできると共に、耕耘始め(旋回終り)における土の盛上がりも小さなものにできて、耕耘精度を向上させることができ、特にPTO回転数が高くなる程土や砂の飛散などを少なく有効に抑えて、安全にして良好な作業を可能とさせるものである。
【0019】
【発明の効果】
以上実施例から明らかなように本発明は、走行車(1)に装備する耕耘ロータリ作業機(8)の昇降を行う昇降操作手段(50)と、耕耘ロータリカバー(21)を前後に移動させるカバー移動制御手段(52)とを備え、前記昇降操作手段(50)によるロータリ作業機(8)の昇降動作に連動してロータリカバー(21)位置を前後に移動制御すると共に、エンジン(38)の出力制御を行うエンジン出力制御手段(47)を備え、昇降操作手段(50)による作業機(8)の上昇操作に連動してエンジン(38)回転数を低回転設定値まで低減させる耕耘ロータリ作業機において、設定エンジン(38)回転数を維持させながら走行を行う電子ガバナコントローラ(47)から得られるエンジン(38)負荷の基準値を設定する負荷設定器(48)と、作業機(8)を昇降させる昇降バルブ(49)と、作業機(8)を昇降操作する昇降操作手段(50)によるワンタッチ昇降のオンオフを行うワンタッチ入切スイッチ(51)とを備え、電子ガバナコントローラ(47)から得られるエンジン(38)の負荷変化に基づいて昇降バルブ(49)を自動制御し、作業機(8)の走行車(1)に対する支持高さを可変させ耕耘深さを変化させると共に、前記昇降操作手段(50)の昇降操作に連動してロータリカバー(52)を前後方向に回動させてリヤカバー(54)を上下方向に移動変化させ、エンジン(38)負荷の変化に基づいて作業機(8)を昇降させてエンジン(38)負荷を一定に制御する負荷制御を行わせる一方、昇降操作手段(50)による作業機(8)の上げ・下げ操作によってエンジン(38)の回転数及び出力トルク特性を変更するエンジン(38)出力制御を行わせるもので、耕耘終り(旋回始め)時、耕耘始め(旋回終り)時耕耘精度を向上させることができ、作業性や耕耘精度を一層向上させることができるものである。
【図面の簡単な説明】
【図1】制御回路図である。
【図2】全体の側面図である。
【図3】全体の平面図である。
【図4】ロータリ部の側面説明図である。
【図5】ロータリ部の平面説明図である。
【図6】制御部の配置説明図である。
【図7】ロータリカバー部の側面説明図である。
【図8】ロータリカバー部の側面説明図である。
【図9】フローチャートである。
【図10】昇降スイッチ連動のロータリカバーの回動ルーチンを示す説明図である。
【図11】エンジン出力の通常の作業トルク特性を示す説明図である。
【図12】エンジン出力の低回転トルク特性を示す説明図である。
【符号の説明】
(1) トラクタ(走行車)
(8) 作業機
(21) ロータリカバー
(38) エンジン
(47) コントローラ(出力制御手段)
(50) 昇降スイッチ(昇降操作手段)
(52) 回動モータ(カバー移動制御手段)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tilling rotary working machine in which a tilling rotary working machine is provided at a rear portion of a traveling vehicle to perform a tilling operation or the like.
[0002]
[Problems to be solved by the invention]
In the case of this type of tillage rotary work machine, if the rotary cover is installed in a fixed position, when the work machine is lifted and the machine is turned, the gap between the bottom end of the rotary cover and the ground is also enlarged, such as immediately after the start of turning. When soil and stones scatter behind by the rotation of the rotary, the soil and stones jump out of the gap to the outside of the cover. Further, as a conventional technique, as shown in Japanese Patent Publication No. 7-67409, there is a combination of tillage depth control and forward and backward movement of a tillage rotary cover, but this does not solve the problem.
[0003]
[Means for Solving the Problems]
However, the present invention includes lifting and lowering operation means for raising and lowering a cultivating rotary work machine equipped on a traveling vehicle, and cover moving control means for moving a cultivating rotary cover back and forth, and raising and lowering the rotary work machine by the lifting and lowering operation means. Equipped with engine output control means for controlling the movement of the rotary cover position back and forth in conjunction with the operation, and controlling the output of the engine. A load setting device that sets the reference value of the engine load obtained from an electronic governor controller that travels while maintaining the set engine speed in a tilling rotary work machine that reduces the work machine, an elevating valve that moves the work machine up and down, and a work machine A one-touch on / off switch for turning on / off one-touch elevating operation by elevating operation means for elevating the operation, The lift valve is automatically controlled based on the load change of the engine obtained from the child governor controller, and the support height of the working machine with respect to the traveling vehicle is changed to change the tilling depth, and in conjunction with the lifting operation of the lifting operation means. While rotating the rotary cover in the front-rear direction to move and change the rear cover in the vertical direction, the work implement is raised and lowered based on the change in the engine load to perform load control for controlling the engine load to be constant. The engine output is controlled to change the engine speed and output torque characteristics by raising and lowering the work equipment by means of, and the tilling accuracy at the end of tilling (start of turning) and at the beginning of tilling (end of turning) are improved. allowed, to thereby improve the workability and tillage accuracy.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a control circuit diagram, FIG. 2 is an overall side view, and FIG. 3 is a plan view thereof. In FIG. 1, (1) is a tractor which is a traveling vehicle having front and rear wheels (2) and (3). A steering wheel (6) is provided in front of the driver's seat (5) in 4), and the steering of the vehicle body is performed by turning the front wheel (2) by operating the handle (6).
[0006]
As shown in FIG. 4, a tractor (1) is equipped with a side drive type tilling rotary working machine (8) via a three-point link mechanism (7) so as to be able to move up and down freely, and a gearbox (9) is provided at the center. The input shaft (10) is connected to the PTO shaft of the tractor (1) via a drive shaft with a universal joint, and the tilling driving force is input to the gearbox (9).
[0007]
A beam (11), which is a main frame, protrudes from both sides of the side of the gear box (9), and a support plate (12) is fixedly provided in the middle of each of the beams (11). A pin (14) for pivotally connecting the lower link (13) of the three-point link mechanism (7) protrudes from the front end of the three-point link mechanism (7). The front end of the depth frame (15) is pivotally supported at the rear end, and a gear box ( 9) The rear end of the top link (17) of the three-point link mechanism (7) is connected to the front end of the upper mast (16).
[0008]
Further, an upper part of a chain case (18) is fixed to the left outer end of the beam (11), and a tilling nail shaft (19) is laid under the lower part of the chain case (18). A large number of tilling claws (20)... Composed of flat claws are radially implanted in a side view, and the upper part of the rotation locus of the tilling claws (20) is covered with a rotary cover (21), and both sides are side covers (22). Covered by. The tiller shaft (19) is driven via a gear in the gear box (9), a transmission shaft in the beam (11), a sprocket and a chain in the chain case (18), and the tiller claws (20) ... Tillage is performed by rotating.
[0009]
Further, a first plate (23) is fixedly provided in front of both left and right ends of the beam (11), and a support rod made of pipe is provided at a front end of the plate (23) via a bolt (24) and a second plate (25). (25) is laid horizontally, and a rotating shaft (27) is rotatably inserted into the pipe supporting rod (26) to form a double shaft structure, and a second shaft of the rotating shaft (27) is formed. The cutting blade (30) made of spring steel is detachably fixed to the fixed mounting plates (28) on both left and right sides sandwiching the plate (25) via bolts (29). Part rushes into the ground. An electric lifting cylinder (electric motor) (31) for raising and lowering the cutting blade is interposed between the second plate (25) and the fixed mounting plate (28), and a fixing bracket for the second plate (25) is provided. (32) The electric cylinder (31) is supported via the pivot (33), and the tip of the rod (34) of the electric cylinder (31) is connected to the fixed mounting plate (28) via the pivot (35). The cutting blade (30) is swung up and down around the rotation shaft (27) by the expansion and contraction operation of the cylinder (31), so that the depth of entry of the cutting blade (30) is appropriately changed.
[0010]
The cutting blade (30) is formed such that the upper side is formed into a substantially straight portion (30a) and the lower side is formed into a curved portion (30b), and is tilted in a front-to-back and back-to-back state, so that the rotation locus (A) of the tilling claw (20) is formed. The curved portion (30b) faces in the front portion of the slab so as to overlap in side view, and the stub entry point of the cutting blade (30) substantially coincides with the stub entry point of the tilling claw (20). At the time of cutting the soil of 20), the cutting blade (30) is used to cut the soil, and the cut soil is easily tilled by the tilling claws (20) so as to reduce the load in the tilling operation. Make up. Further, the cutting blade (30) adjusts the length of the cutting blade (30) into the soil in a hard soil condition in which the tilling rotary (36) floats and becomes a dashed state by largely adjusting the rotary (36). On the other hand, when the tillage load changes due to a change in the field scene or the tractor posture and the engine load becomes large, the rush length is adjusted to a small value to prevent the floating, and the engine load is stably maintained.
[0011]
Further, the tilling claw (20) has a configuration in which the tip is bent alternately right or left by a predetermined width (about 80 mm) alternately in order to turn the soil after being cut to have elasticity. Four holders (37) attached to the same cross section of the claw shaft (19) so that the bending direction of 20) is the same in the right or left direction (the number of claw per rotation of the claw shaft (19)) Two tilling claws (20) are mounted in the same direction. The turning radius (a) of the tilling claw (20) is approximately 245 mm, and the base interval (T) between the opposing tilling claws (20) and (20) in opposing relation is set to 5 with a large gap. The interval (t), which is the gap of the claw locus (L), is provided at a ratio of approximately 1 (T: t ≒ 5: 1) (T ≒ 200 mm, t ≒ 40 mm), and the base interval (T) is increased to cultivate. By reducing the required number of claws (20), the required power is reduced, and the remaining power during tilling with the same power is turned to the speed to enable high-speed (approximately twice the conventional) tilling. It is composed.
[0012]
As shown in FIGS. 1 and 6, a fuel injection solenoid (41) which is a rack solenoid for adjusting a fuel injection amount of a fuel injection pump (39) of an engine (38) by an electronic governor (40) is provided. A rack position sensor (42) of an electronic governor (40) for detecting a fuel injection amount, a pickup-type rotation sensor (43) for detecting a rotation speed of an engine (38), and an accelerator lever (44) operated by an operator. Alternatively, a potentiometer type accelerator sensor (46) for detecting the operation amount of the pedal (45) is provided, and the solenoid (41) and each sensor (42) are provided to the governor controller (47) of the electronic governor (40) which is the engine output control means. ) (43) (46) is connected, and the engine speed set by the accelerator lever (43) or the pedal (44). By adjusting the amount of fuel injection by the electronic governor (40), and configured to perform traveling while maintaining the set engine speed.
[0013]
A load factor setting device (48) for setting a reference value of a load factor (rack position change rate) of the engine (38) obtained from the electronic governor controller (47), and a hydraulic lifting cylinder for lifting and lowering the work implement (8) Electromagnetic lift valve (49), a one-touch operation type elevation switch (50) as an elevation operation means for operating and lowering the work machine (8), and one-touch elevation on / off (on / off) by the switch (50). ), And a rotary motor (rotary cylinder) (rotary cylinder) as rotary cover movement control means for rotating the rotary cover (21) in the front-rear direction about the tilling claw shaft (19). 52), and a setting controller (48), a valve (49), and each switch (50) are provided to the tillage controller (53) connected to the electronic governor controller (47). (51) The motor (52) is connected, and the lift valve (49) is automatically controlled based on the change in the load factor of the engine (38) obtained from the electronic governor controller (47), and the work machine (8) The work is performed while the load factor of the engine (38) is maintained substantially constant by changing the support height of the tractor (1) and changing the tilling depth, while the lifting switch (50) is used. The rotary cover (52) is rotated in the front-rear direction in conjunction with the lifting / lowering operation of (2), so that the rear cover (54) connected to the rear of the cover is moved and changed in the vertical direction.
[0014]
This embodiment is configured as described above, and is conventionally performed under the working conditions of, for example, one claw per rotation of the claw shaft (19), a claw shaft rotation speed of approximately 170 rpm, and a vehicle speed of 0.5 m / s. The tilling operation is performed under the operating conditions of a claw shaft rotation speed of approximately 170 rpm and a vehicle speed of 1 to 1.5 m / s, with the number of claws per rotation of the claw shaft (19) being two. The work efficiency is greatly improved by increasing the speed more than twice.
[0015]
During the work, the load control for raising and lowering the work implement (8) based on the change in the load of the engine (38) and controlling the load of the engine (38) to be constant is performed, while the lift switch (50) is used. At the time of raising / lowering operation of the work machine (8), engine output control for changing the rotation speed and output torque characteristics of the engine (38) is performed. The flowchart of FIG. 9, the routine of FIG. This operation will be described with reference to FIG.
[0016]
Normally, the rotation of the engine (38) equals the actual engine speed (N1) detected by the rotation sensor (43) to the set engine speed (N2) detected by the accelerator sensor (46) (N2 = N1) is controlled by the electronic governor (40). When the one-touch on / off switch (51) is turned on and the elevating switch (50) is turned up during such rotation control, FIG. As shown in FIG. 12, the rotation speed of the engine (38) is reduced to a rotation speed having a set value of 1500 rpm, and the engine output is switched to a low rotation torque characteristic having a maximum torque at the time of 1500 rpm. The running speed is automatically reduced, and the torque required for turning is ensured to enable a favorable operation.
[0017]
When lowering the lift switch (50) after turning, etc., as shown in FIG. 11, the rotation speed of the engine (38) is increased to the engine rotation speed of 2500 rpm set by the accelerator, and the maximum torque is set at the time of 2500 rpm. The engine output is switched to the normal work torque characteristic to secure the maximum torque at this speed at a predetermined traveling speed necessary for the work, thereby enabling efficient high-speed tillage work.
[0018]
When the engine speed is increased / decreased and the engine torque characteristics are switched by the elevation switch (50), the rotary cover (21) also moves and changes at the same time. As shown in FIG. When the working machine (8) is lowered to the normal working position by the lowering operation, the rotary motor (52) reduces the piston rod (52a) to the shortest, and the rotary cover around the tilling claw shaft (19). (21) is rotated forward, and the rear cover (54) is moved upward to level the tilling surface at the lowermost end of the rear cover (54), while the working machine is raised by raising and lowering the switch (50). When performing the turning operation or the like by raising (8), the rotating motor (52) extends the piston rod (52a) to the maximum length, and the rotor is rotated about the tilling claw shaft (19). By rotating the cover (21) backward to lower the rear cover (54), the gap (C) formed between the lowermost end of the rear cover (54) and the ground is reduced, Even when soil and stones are scattered backward by the rotation of (36), it is possible to perform a good turning operation and the like by maximally suppressing the outside of the cover (54) from the gap (C) to the outside. . As a result of rotating the rotary cover (21) backward during the turning work as described above, movement such as scattering of the soil to the outside of the cover (21) at the end of tillage (start of turning) can be minimized, and at the start of plowing (end of turning). The rise of the soil can be made small and the cultivation accuracy can be improved. Particularly, as the PTO rotation speed increases, the scattering of soil and sand is effectively reduced and the safe and good work is enabled. Things.
[0019]
【The invention's effect】
As is clear from the above embodiment, the present invention moves the tilling rotary cover (21) back and forth by raising and lowering operation means (50) for raising and lowering the tilling rotary work machine (8) mounted on the traveling vehicle (1). A cover movement control means (52) for controlling the movement of the rotary cover (21) back and forth in conjunction with the elevating operation of the rotary working machine (8) by the elevating operation means (50) , and the engine (38). Tillage rotary which is provided with an engine output control means (47) for controlling the output of the engine, and which reduces the engine (38) rotation speed to a low rotation set value in conjunction with the lifting operation of the work implement (8) by the lifting operation means (50). In the work machine, a load setting for setting a reference value of an engine (38) load obtained from an electronic governor controller (47) running while maintaining the set engine (38) rotation speed. One-touch on / off switch (51) for turning on and off one-touch lifting by means of a container (48), a lifting / lowering valve (49) for raising / lowering the working machine (8), and a lifting / lowering operating means (50) for lifting / lowering the working machine (8). The lift valve (49) is automatically controlled based on a change in load on the engine (38) obtained from the electronic governor controller (47), and the support height of the working machine (8) with respect to the traveling vehicle (1) is variable. In addition to changing the tillage depth, the rotary cover (52) is rotated in the front-rear direction in conjunction with the elevating operation of the elevating operation means (50) to move and change the rear cover (54) in the up-down direction. 38) The work implement (8) is moved up and down based on the change in load to perform load control for controlling the load of the engine (38) to be constant, while the work implement (8) is moved up and down by the elevation operation means (50). Intended to perform an engine (38) output control for changing the rotational speed and the output torque characteristics of the engine (38) by the lower-lowering operation, when tilling end (turning start), the tilling precision when tilling start (turning end) Ki is possible to improve, in which the workability and tillage accuracy can be further improved.
[Brief description of the drawings]
FIG. 1 is a control circuit diagram.
FIG. 2 is an overall side view.
FIG. 3 is an overall plan view.
FIG. 4 is an explanatory side view of a rotary unit.
FIG. 5 is an explanatory plan view of a rotary unit.
FIG. 6 is an explanatory diagram of an arrangement of a control unit.
FIG. 7 is an explanatory side view of a rotary cover.
FIG. 8 is an explanatory side view of the rotary cover.
FIG. 9 is a flowchart.
FIG. 10 is an explanatory diagram showing a rotation routine of a rotary cover linked with a lifting switch.
FIG. 11 is an explanatory diagram showing a normal working torque characteristic of an engine output.
FIG. 12 is an explanatory diagram showing a low rotation torque characteristic of an engine output.
[Explanation of symbols]
(1) Tractor (traveling vehicle)
(8) Work implement (21) Rotary cover (38) Engine (47) Controller (output control means)
(50) Lift switch (lift operation means)
(52) Rotation motor (cover movement control means)

Claims (1)

走行車(1)に装備する耕耘ロータリ作業機(8)の昇降を行う昇降操作手段(50)と、耕耘ロータリカバー(21)を前後に移動させるカバー移動制御手段(52)とを備え、前記昇降操作手段(50)によるロータリ作業機(8)の昇降動作に連動してロータリカバー(21)位置を前後に移動制御すると共に、エンジン(38)の出力制御を行うエンジン出力制御手段(47)を備え、昇降操作手段(50)による作業機(8)の上昇操作に連動してエンジン(38)回転数を低回転設定値まで低減させる耕耘ロータリ作業機において、設定エンジン(38)回転数を維持させながら走行を行う電子ガバナコントローラ(47)から得られるエンジン(38)負荷の基準値を設定する負荷設定器(48)と、作業機(8)を昇降させる昇降バルブ(49)と、作業機(8)を昇降操作する昇降操作手段(50)によるワンタッチ昇降のオンオフを行うワンタッチ入切スイッチ(51)とを備え、電子ガバナコントローラ(47)から得られるエンジン(38)の負荷変化に基づいて昇降バルブ(49)を自動制御し、作業機(8)の走行車(1)に対する支持高さを可変させ耕耘深さを変化させると共に、前記昇降操作手段(50)の昇降操作に連動してロータリカバー(52)を前後方向に回動させて、リヤカバー(54)を上下方向に移動変化させ、エンジン(38)負荷の変化に基づいて作業機(8)を昇降させてエンジン(38)負荷を一定に制御する負荷制御を行わせる一方、昇降操作手段(50)による作業機(8)の上げ・下げ操作によってエンジン(38)の回転数及び出力トルク特性を変更するエンジン(38)出力制御を行わせることを特徴とする耕耘ロータリ作業機。A lifting / lowering operation means (50) for raising / lowering a tilling rotary work machine (8) mounted on the traveling vehicle (1); and a cover moving control means (52) for moving a tilling rotary cover (21) back and forth. Engine output control means (47) for controlling the movement of the rotary cover (21) back and forth in conjunction with the elevating operation of the rotary work machine (8) by the elevating operation means (50) and for controlling the output of the engine (38). A cultivating rotary work machine that reduces an engine (38) rotation speed to a low rotation set value in conjunction with a lifting operation of a work machine (8) by a lifting operation means (50); A load setting device (48) for setting a reference value of a load of an engine (38) obtained from an electronic governor controller (47) running while maintaining, and a work machine (8) are raised and lowered. An engine provided from an electronic governor controller (47), comprising a lift valve (49) and a one-touch on / off switch (51) for turning on and off a one-touch lift by a lift operation means (50) for lifting and lowering the work machine (8). The lift valve (49) is automatically controlled based on the load change of (38), the support height of the work machine (8) with respect to the traveling vehicle (1) is varied to change the tillage depth, and the lifting operation means ( The rotary cover (52) is rotated in the front-rear direction in conjunction with the lifting / lowering operation of (50), and the rear cover (54) is moved up and down to change the working machine (8) based on the change in the load of the engine (38). Is lifted and lowered to perform load control for controlling the load of the engine (38) to be constant, and the engine (38) is raised and lowered by the lifting / lowering operating means (50) to raise and lower the work machine (8). Cultivating rotary working machine, characterized in that to perform engine (38) output control for changing the rotational speed and the output torque characteristics of the.
JP03288496A 1996-01-25 1996-01-25 Tilling rotary work machine Expired - Fee Related JP3578861B2 (en)

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Application Number Priority Date Filing Date Title
JP03288496A JP3578861B2 (en) 1996-01-25 1996-01-25 Tilling rotary work machine

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JP3578861B2 true JP3578861B2 (en) 2004-10-20

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JP4693521B2 (en) * 2005-06-29 2011-06-01 ヤンマー株式会社 Agricultural machinery
JP6120796B2 (en) * 2014-03-27 2017-04-26 ヤンマー株式会社 Work vehicle

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