JPH0799802A - Device for controlling rotation speed of tilling tine shaft in rotary tilling machine - Google Patents
Device for controlling rotation speed of tilling tine shaft in rotary tilling machineInfo
- Publication number
- JPH0799802A JPH0799802A JP25079493A JP25079493A JPH0799802A JP H0799802 A JPH0799802 A JP H0799802A JP 25079493 A JP25079493 A JP 25079493A JP 25079493 A JP25079493 A JP 25079493A JP H0799802 A JPH0799802 A JP H0799802A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- rotation speed
- tilling
- speed
- pto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 210000000078 claw Anatomy 0.000 claims description 36
- 238000003971 tillage Methods 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Soil Working Implements (AREA)
- Agricultural Machines (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はロータリ耕耘機における
耕耘爪軸の回転速度制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary speed control device for a tillage pawl shaft in a rotary tiller.
【０００２】[0002]
【従来の技術】従来、ロータリ耕耘機では、トラクタ等
でロータリ耕耘機の機体を牽引走行させながら、同トラ
クタの動力取出し軸（ＰＴＯ軸）からの動力で耕耘爪軸
を回転させ、耕耘爪軸に多数植設した耕耘爪を地面に打
込んで耕耘作業を行うように構成されており、機体の走
行速度と耕耘爪軸の回転速度とをマッチさせて、各種作
業内容に適した一定の耕耘ピッチ（耕耘爪を打込む間
隔）で耕耘作業を行うことを理想としている。2. Description of the Related Art Conventionally, in a rotary cultivator, while the body of the rotary cultivator is being towed by a tractor or the like, the cultivating pawl shaft is rotated by the power from the power take-off shaft (PTO shaft) of the tractor. It is configured to drive plowing work by plowing a large number of plowing claws planted on the ground, and by matching the traveling speed of the aircraft with the rotation speed of the plowing claw shaft, a constant plowing suitable for various work contents can be achieved. It is ideal to perform plowing work at the pitch (the interval at which the plowing claws are driven).
【０００３】[0003]
【発明が解決しようとする課題】ところが、近年、ロー
タリ耕耘機を牽引するトラクタの走行用変速機に、ハイ
ドロ スタティック トランスミッション（ＨＳＴ）
等、走行速度を無段階に変速できる変速機が使用され始
めている。However, in recent years, a hydrostatic transmission (HST) has been used in a transmission for a tractor that drives a rotary tiller.
For example, a transmission that can continuously change the traveling speed has begun to be used.
【０００４】かかる変速機では、前記耕耘爪軸を駆動す
るＰＴＯ軸の回転速度とは関係なく機体の走行速度が変
速されるため、耕耘作業中、走行速度が変化するとこれ
につれて耕耘ピッチが変化して、理想とする一定ピッチ
の耕耘作業ができないという問題がある。In such a transmission, the traveling speed of the airframe is changed regardless of the rotation speed of the PTO shaft that drives the tilling claw shaft. Therefore, when the traveling speed changes during the tilling work, the tilling pitch changes accordingly. Therefore, there is a problem that the ideal constant pitching work cannot be performed.
【０００５】なお、ＰＴＯ軸用に３段階に変速可能の変
速機を具備したトラクタもあるが、かかるトラクタにお
いても、図５で示すように、ＰＴＯ軸の変速比が段階的
に変化するため、耕耘ピッチの偏差が大きく、また、所
要動力が急増するため高速化ができないという問題があ
る。Although there is a tractor equipped with a transmission for the PTO shaft capable of shifting in three stages, even in such a tractor, the gear ratio of the PTO shaft changes stepwise as shown in FIG. There is a problem that the speed cannot be increased because the deviation of the tilling pitch is large and the required power increases rapidly.
【０００６】[0006]
【課題を解決するための手段】そこで、本発明では、ロ
ータリ耕耘機の走行速度検出手段と、耕耘爪軸回転速度
の変更及び耕耘爪軸への動力伝達を遮断することが可能
な耕耘爪軸回転速度変更手段と、コントローラとを具備
して、走行速度検出手段からの信号に応じて、耕耘爪軸
の回転速度を変更若しくは耕耘爪軸への動力伝達を遮断
することを特徴とするロータリ耕耘機における耕耘爪軸
の回転速度制御装置を提供せんとするものである。Therefore, in the present invention, the traveling speed detecting means of the rotary cultivator and the cultivating pawl shaft capable of changing the rotating speed of the cultivating pawl shaft and interrupting the power transmission to the culturing pawl shaft. A rotary tiller characterized by comprising a rotation speed changing means and a controller for changing the rotation speed of the tilling pawl shaft or cutting off power transmission to the tilling pawl shaft according to a signal from the traveling speed detecting means. It is intended to provide a rotation speed control device for a tillage claw shaft in a machine.
【０００７】[0007]
【実施例】本発明の実施例を図面を参照して説明する。Embodiments of the present invention will be described with reference to the drawings.
【０００８】図１は、本発明に係る耕耘爪軸の回転速度
制御装置を具備したロータリ耕耘機Ａと、これを牽引す
る農業用トラクタＢとを示している。FIG. 1 shows a rotary cultivator A equipped with a rotation speed control device for a tillage claw shaft according to the present invention, and an agricultural tractor B for pulling the rotary cultivator A.
【０００９】農業用トラクタＢは、前部に配設した原動
機部１の動力を、原動機部１の後方に連設したクラッチ
ハウジング２を介して同ハウジング２の後方に連設した
ミッションケース３に伝達して同ケース３の左右側に配
設した左右後車輪４を駆動すると共に、同ケース３から
前方向に延出したプロペラシャフト５を介して原動機部
１の左右側下方に配設した左右前車輪６を駆動するよう
に構成されており、特に、ミッションケース３中にハイ
ドロ スタティック トランスミッション（ＨＳＴ）を
設け、原動機部１の動力を無段階に変速することによっ
て、農業用トラクタＢ及びロータリ耕耘機Ａの走行速度
を無段階に変更するようにしている。In the agricultural tractor B, the power of the prime mover section 1 arranged at the front part is transmitted to the mission case 3 connected to the rear side of the prime mover section 1 via the clutch housing 2 connected to the rear side of the prime mover section 1. The left and right rear wheels 4 arranged on the left and right sides of the case 3 are transmitted to drive the left and right sides below the left and right sides of the motor unit 1 via a propeller shaft 5 extending forward from the case 3. It is configured to drive the front wheels 6, and in particular, by providing a hydrostatic transmission (HST) in the mission case 3 and continuously changing the power of the prime mover unit 1, the agricultural tractor B and the rotary tiller are cultivated. The running speed of Aircraft A is continuously changed.
【００１０】ミッションケース３の前部には、前記ＨＳ
Ｔに連結した主変速レバー７を立設し、同主変速レバー
７の前後傾動操作によって、農業用トラクタＢの走行速
度及び進行方向を前後切換えるようにしており、走行速
度検出手段s1としての車速センサ33を車軸に配設してい
る。At the front of the mission case 3, the HS
The main speed change lever 7 connected to T is erected, and the forward and backward tilting operation of the main speed change lever 7 is used to switch the traveling speed and traveling direction of the agricultural tractor B back and forth. The sensor 33 is arranged on the axle.
【００１１】また、ミッションケース３中に、前記ＨＳ
Ｔとは別経路で原動機部１のエンジンに連結した耕耘爪
軸回転速度変更手段m1としてのＰＴＯ変速機を設けて、
後述するロータリ耕耘機Ａの耕耘爪軸29を駆動するＰＴ
Ｏ軸22の回転速度を変速するようにしている。Further, in the mission case 3, the HS
By providing a PTO transmission as a tilling claw shaft rotation speed changing means m1 connected to the engine of the prime mover section 1 through a route different from T,
PT for driving the tiller claw shaft 29 of the rotary tiller A described later
The rotation speed of the O-axis 22 is changed.
【００１２】ＰＴＯ変速機は、いわゆるパワーシフト型
の変速機であり、正方向３段、逆方向１段に構成した４
対の常時噛合歯車と、各変速段の歯車と出力軸との間に
それぞれ介設した湿式多板クラッチと、各湿式多板クラ
ッチを断接させるための変速用油圧アクチュエータとで
構成されており、変速用油圧アクチュエータの作動によ
り、目的の変速段の湿式多板クラッチをつなぐことで、
目的の変速比で動力を伝達するものであり、上記変速用
油圧アクチュエータは後述のコントローラＣで制御され
ている。The PTO transmission is a so-called power shift type transmission, and is composed of four forward gears and one reverse gear.
It is composed of a pair of constantly meshing gears, a wet multi-plate clutch interposed between the gears of each gear and the output shaft, and a speed change hydraulic actuator for connecting and disconnecting each wet multi-plate clutch. By connecting the wet multi-plate clutch at the desired gear by operating the gear shifting hydraulic actuator,
Power is transmitted at a target gear ratio, and the gear shifting hydraulic actuator is controlled by a controller C described later.
【００１３】ロータリ耕耘機Ａは、上記農業用トラクタ
Ｂの後方に、連結機構20を介してロータリ耕耘機Ａを昇
降及び左右傾動自在に連結されており、ミッションケー
ス３の上面に配設した昇降作動用の油圧装置21により、
ロータリ耕耘機Ａを昇降作動させるようにしており、ミ
ッションケース３の後面から突出したＰＴＯ軸22と伝導
軸23を介して連動連結したロータリーギヤボックス24か
ら左右に突設したメインビームの一側端にチエン伝導機
構を内蔵したチエンケース26を、他側端に支持ブラケッ
トを、それぞれ垂設して、チエンケース26下端と支持ブ
ラケット下端との間に、多数の耕耘爪28を植設した耕耘
爪軸29を軸架し、ＰＴＯ軸22からの動力で耕耘作業を行
うようにしている。The rotary cultivator A is connected to the rear of the agricultural tractor B via a connecting mechanism 20 so that the rotary cultivator A can be moved up and down and tilted left and right. By the hydraulic device 21 for operation,
The rotary cultivator A is operated to move up and down, and one side end of the main beam projecting left and right from a rotary gear box 24 that is interlockingly connected via a PTO shaft 22 protruding from the rear surface of the mission case 3 and a transmission shaft 23. A chisel case 26 having a built-in chien conduction mechanism and a support bracket at the other end are vertically hung, and a large number of plowing pawls 28 are planted between the lower end of the chien case 26 and the lower end of the support bracket. The shaft 29 is mounted on the shaft, and the power from the PTO shaft 22 is used for cultivating work.
【００１４】したがって、ロータリ耕耘機Ａの走行速度
はＨＳＴによって無段階に変化するにもかかわらず、耕
耘爪軸29を駆動するＰＴＯ軸22の回転速度は、上記走行
速度とは無関係にかつ段階的に変化することになる。Therefore, although the traveling speed of the rotary tiller A changes steplessly by the HST, the rotation speed of the PTO shaft 22 for driving the tiller claw shaft 29 is irrelevant and stepwise regardless of the traveling speed. Will change to.
【００１５】かかるロータリ耕耘機Ａと農業用トラクタ
Ｂにおいて、本発明では、耕耘爪軸29の回転速度制御装
置Ｃを設けている。In the rotary cultivator A and the agricultural tractor B, according to the present invention, a rotation speed control device C for the tillage claw shaft 29 is provided.
【００１６】耕耘爪軸29の回転速度制御装置Ｃは、図２
で示すように、コントローラ30の入力側に、原動機部１
のエンジン回転速度検出手段S2としてのタコメータ31
と、エンジンの負荷検出手段S3と、走行速度検出手段S1
としての車速センサ33と、ＰＴＯ軸22の回転速度検出手
段S4としてのＰＴＯ軸回転速度センサ34とを接続し、出
力側に、表示ランプまたはブザー35と、耕耘爪軸回転速
度変更手段m1としてのＰＴＯ変速機に変速動作を行わせ
るための変速用油圧アクチュエータ36とを接続してい
る。The rotation speed control device C for the tillage claw shaft 29 is shown in FIG.
As shown in, the motor side 1 is connected to the input side of the controller 30.
Tachometer 31 as the engine speed detection means S2 of
, Engine load detection means S3, and traveling speed detection means S1
And a PTO shaft rotation speed sensor 34 as a rotation speed detecting means S4 of the PTO shaft 22 are connected, and an output lamp or a buzzer 35 and a plowing claw shaft rotation speed changing means m1 are connected to the output side. A hydraulic hydraulic actuator 36 for shifting, which causes the PTO transmission to perform a shifting operation, is connected.
【００１７】そして、図３で示すように、走行速度に応
じて、ＰＴＯ変速機の変速比を変更することにより、耕
耘爪軸29の回転速度を自動的に変更するようにしてい
る。Then, as shown in FIG. 3, the rotation speed of the tiller pawl shaft 29 is automatically changed by changing the gear ratio of the PTO transmission according to the traveling speed.
【００１８】図３中、…で示される部分は、ＰＴＯ変速
機をニュートラルにして、耕耘爪軸29への動力伝達を遮
断し、耕耘爪28にかかる地面からの抵抗により耕耘爪軸
29を回転させことによって耕耘作業を行っており、走行
速度が０のときＰＴＯ変速が第１速に入り、走行速度が
上がって耕耘爪軸29の回転速度が理想回転速度とクロス
した時点で、ＰＴＯ変速機をニュートラルにして、耕耘
爪28にかかる地面からの抵抗により耕耘爪軸29を回転さ
せての耕耘作業を行わせ、更に走行速度が上がって第１
の所定速度に達すると、ＰＴＯ変速が第２速に入り、走
行速度が上がって耕耘爪軸29の回転速度が理想回転速度
とクロスした時点で、ＰＴＯ変速機をニュートラルにし
て、耕耘爪28にかかる地面からの抵抗により耕耘爪軸29
を回転させての耕耘作業を行わせ、更に走行速度が上が
って第２の所定速度に達すると、ＰＴＯ変速が第３速に
入り、走行速度が上がって耕耘爪軸29の回転速度が理想
回転速度とクロスした時点で、ＰＴＯ変速機をニュート
ラルにして、耕耘爪28にかかる地面からの抵抗により耕
耘爪軸29を回転させての耕耘作業を行わせるというよう
に、理想回転速度に耕耘爪軸29の回転速度を近似させて
いる。3, the PTO transmission is set to neutral to cut off the power transmission to the tiller claw shaft 29, and the tiller claw shaft 28 is dragged by the resistance from the ground.
Plowing work is performed by rotating 29, when the traveling speed is 0, the PTO gear shifts to the first speed, and when the traveling speed increases and the rotating speed of the tiller claw shaft 29 crosses the ideal rotating speed, With the PTO transmission set to neutral, the tilling work is performed by rotating the tilling shaft 29 due to the resistance from the ground that is applied to the tilling claw 28.
When the predetermined speed of PTO is reached, the PTO gear shifts to the second speed, and when the traveling speed increases and the rotation speed of the plow shaft 29 crosses the ideal rotation speed, the PTO transmission is set to neutral and the plow 28 is moved. Due to the resistance from the ground, the tillage shaft 29
When the plowing work is performed by rotating, the traveling speed further increases and reaches the second predetermined speed, the PTO gear shifts to the third speed, the traveling speed increases, and the rotation speed of the plowing pawl shaft 29 ideally rotates. When the speed crosses the speed, the PTO transmission is set to the neutral position, and the resistance from the ground applied to the tiller claw 28 causes the tiller work to be performed by rotating the tiller claw shaft 29. The rotation speed of 29 is approximated.
【００１９】このように、耕耘爪軸29の回転速度を理想
の回転速度に近似させており、特に、耕耘爪軸29の回転
速度が理想回転速度とクロスした時点から次の所定走行
速度までの間、耕耘爪28にかかる地面からの抵抗により
耕耘爪軸29を回転させての耕耘作業を行わせることによ
って、前述した耕耘ピッチを必要十分な精度で略一定に
保持することができる。In this way, the rotation speed of the tilling claw shaft 29 is approximated to the ideal rotation speed, and in particular, from the time when the rotation speed of the tilling claw shaft 29 crosses the ideal rotation speed to the next predetermined traveling speed. In the meantime, by performing the tilling work by rotating the tiller claw shaft 29 by the resistance from the ground applied to the tiller claw 28, the above-mentioned tilling pitch can be maintained substantially constant with necessary and sufficient accuracy.
【００２０】しかも、ＰＴＯ変速にＨＳＴやＣＶＴ等の
無段変速機を用いていないので安価であり、また、上記
無段変速機よりも動力伝達のロスが少ないので、ほぼ能
力一杯の高速作業が可能になる。Moreover, since a continuously variable transmission such as HST or CVT is not used for PTO gear shifting, it is inexpensive, and since the loss of power transmission is smaller than that of the above continuously variable transmission, high-speed work almost full capacity is possible. It will be possible.
【００２１】また、ＰＴＯ変速機を、前述したパワーシ
フト型ではなく、シンクロメッシュ型に構成すれば更に
安価にすることができる。Further, if the PTO transmission is constructed as a synchromesh type instead of the above-mentioned power shift type, the cost can be further reduced.
【００２２】なお、本発明では、上記コントローラによ
る自動制御を解除して手動で上記制御を行うこともでき
る。In the present invention, the automatic control by the controller may be canceled and the control may be manually performed.
【００２３】また、上記の耕耘爪軸29の回転速度制御機
能を用いて、図４で示すように、細かく砕土する細耕耘
と、荒起し耕耘と、更に荒い超荒起し耕耘との３段階の
耕耘作業を行うことができる。Further, by using the rotation speed control function of the tilling claw shaft 29, as shown in FIG. 4, there are three types of fine tilling: finely crushed soil, rough tilling, and further rough super rough tilling. It is possible to perform cultivating work in stages.
【００２４】すなわち、ＰＴＯ変速機を高速に変速して
耕耘爪軸29を速く回転させることにより、走行速度０か
ら耕耘爪軸回転速度が理想回転速度とクロスするまでの
間、耕耘ピッチを細かくし所要動力を一杯に使って、耕
土を細かく砕土することができ、これより走行速度が高
くなると、ＰＴＯ変速機をニュートラルにして、耕耘爪
28にかかる地面からの抵抗により耕耘爪軸29を回転させ
ての荒起し耕耘を行い、所定の走行速度になると、ＰＴ
Ｏ変速機を低速に変速して、耕耘爪軸29を強制的に理想
の回転速度よりも低速で回転させることにより、耕耘ピ
ッチを荒くして超荒起し耕耘を行うことができる。That is, by changing the speed of the PTO transmission at a high speed and rotating the tilling pawl shaft 29 at a high speed, the tilling pitch is made fine from the traveling speed of 0 to the tilling pawl shaft rotating speed crossing the ideal rotating speed. The required power can be fully used to crush the cultivated soil finely, and if the traveling speed becomes higher than this, the PTO transmission is set to neutral and the plowing claw is set.
Due to the resistance from the ground applied to 28, the tilling claw shaft 29 is rotated to perform roughing tillage, and when the predetermined traveling speed is reached, PT
By shifting the O transmission to a low speed and forcibly rotating the plowing pawl shaft 29 at a speed lower than the ideal rotation speed, it is possible to roughen the plowing pitch and perform super rough plowing.
【００２５】また、上記の耕耘爪軸29の回転速度制御機
能を、油圧装置21によるロータリ耕耘機Ａの上昇作動に
連繋させて、ロータリ耕耘機Ａが上昇しているときは、
耕耘爪軸29の回転を停止若しくは最低速に制御すること
ができ、このようにすることで、上昇したロータリ耕耘
機Ａの耕耘爪28との接触による負傷や器物の損壊等の危
険を防止することができる。The rotary speed control function of the tiller claw shaft 29 is linked to the raising operation of the rotary cultivator A by the hydraulic device 21, and when the rotary cultivator A is raised,
The rotation of the tiller shaft 29 can be stopped or controlled to the lowest speed, and by doing so, the risk of injury or damage to the property due to contact with the raised tiller 28 of the rotary tiller A that has risen is prevented. be able to.
【００２６】また、圃場の隅などでロータリ耕耘機Ａを
上昇させて旋回する際、耕耘爪軸29及び耕耘爪28のジャ
イロモーメントが小、若しくは０になり、ローリングが
防止されるので機体の安定性が良くなる。Further, when the rotary cultivator A is raised and turned at a corner of a field, the gyro moment of the cultivating claw shaft 29 and the cultivating claw 28 becomes small or zero, and rolling is prevented, so that the stability of the machine is ensured. It improves the sex.
【図１】本発明に係る耕耘爪軸の回転速度制御装置を具
備したロータリ耕耘機及びこれを牽引する農業用トラク
タの全体側面図。FIG. 1 is an overall side view of a rotary tiller equipped with a rotation speed control device for a tillage claw shaft according to the present invention and an agricultural tractor that pulls the rotary tiller.
【図２】耕耘爪軸の回転速度制御装置の構成を示す説明
図。FIG. 2 is an explanatory diagram showing a configuration of a rotation speed control device for a tillage claw shaft.
【図３】走行速度と耕耘爪軸回転速度との関係を示すグ
ラフ。FIG. 3 is a graph showing the relationship between the traveling speed and the tiller shaft rotation speed.
【図４】走行速度と耕耘爪軸回転速度との関係を示すグ
ラフ。FIG. 4 is a graph showing the relationship between the traveling speed and the tiller shaft rotation speed.
【図５】従来の走行速度と耕耘爪軸回転速度との関係を
示すグラフ。FIG. 5 is a graph showing the relationship between the conventional traveling speed and the plow claw shaft rotation speed.
Ａ ロータリ耕耘機 Ｃ コントローラ m1 耕耘爪軸回転速度変更手段 S1 走行速度検出手段 29 耕耘爪軸 A rotary cultivator C controller m1 cultivating claw shaft rotation speed changing means S1 traveling speed detecting means 29 cultivating claw shaft
Claims (1)
の回転速度の変更及び耕耘爪軸(29)への動力伝達を遮断
することが可能な耕耘爪軸回転速度変更手段(m1)と、コ
ントローラ(C) とを具備して、走行速度検出手段(s1)か
らの信号に応じて、耕耘爪軸(29)の回転速度を変更若し
くは耕耘爪軸(29)への動力伝達を遮断することを特徴と
するロータリ耕耘機における耕耘爪軸の回転速度制御装
置。1. A traveling speed detecting means (S1) and a tillage shaft (29)
It comprises a plowing claw shaft rotation speed changing means (m1) capable of changing the rotation speed of the plowing claw and cutting off power transmission to the plowing claw shaft (29), and a traveling speed detecting means (m). s1) according to the signal from the tiller shaft (29) to change the rotation speed of the tiller shaft (29) or to cut off the power transmission to the tiller shaft (29) rotation speed control of the tiller shaft in the rotary tiller apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25079493A JP2942119B2 (en) | 1993-10-06 | 1993-10-06 | Rotation speed control device of tillage claw shaft in rotary tiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25079493A JP2942119B2 (en) | 1993-10-06 | 1993-10-06 | Rotation speed control device of tillage claw shaft in rotary tiller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0799802A true JPH0799802A (en) | 1995-04-18 |
| JP2942119B2 JP2942119B2 (en) | 1999-08-30 |
Family
ID=17213150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25079493A Expired - Fee Related JP2942119B2 (en) | 1993-10-06 | 1993-10-06 | Rotation speed control device of tillage claw shaft in rotary tiller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2942119B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007166980A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Agricult Mach Co Ltd | Transplanter |
| CN110050525A (en) * | 2019-04-25 | 2019-07-26 | 丰疆智能科技股份有限公司 | Rotary blade of minitiller revolution speed control system and method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016167998A (en) * | 2015-03-12 | 2016-09-23 | 松山株式会社 | Levee plastering machine |
-
1993
- 1993-10-06 JP JP25079493A patent/JP2942119B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007166980A (en) * | 2005-12-22 | 2007-07-05 | Mitsubishi Agricult Mach Co Ltd | Transplanter |
| JP4646798B2 (en) * | 2005-12-22 | 2011-03-09 | 三菱農機株式会社 | Transplanter |
| CN110050525A (en) * | 2019-04-25 | 2019-07-26 | 丰疆智能科技股份有限公司 | Rotary blade of minitiller revolution speed control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2942119B2 (en) | 1999-08-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |