JPH082B2 - Tractor lift control device - Google Patents
Tractor lift control deviceInfo
- Publication number
- JPH082B2 JPH082B2 JP5257903A JP25790393A JPH082B2 JP H082 B2 JPH082 B2 JP H082B2 JP 5257903 A JP5257903 A JP 5257903A JP 25790393 A JP25790393 A JP 25790393A JP H082 B2 JPH082 B2 JP H082B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- depth
- solenoid valve
- proportional solenoid
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【産業上の利用分野】この発明はトラクタの作業機昇降
制御装置に関し、作業精度を向上するようにした作業機
昇降制御装置を得ることを目的とするものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine lifting control apparatus for a tractor, and an object thereof is to obtain a working machine lifting control apparatus with improved working accuracy.
【０００２】[0002]
【従来技術及びその課題】作業機昇降機構のリフトシリ
ンダへの圧力油の供給を制御する上昇用ソレノイド弁及
び、リフトシリンダの圧力油の排出を制御する下降用ソ
レノイド弁は、従来、電磁ソレノイドの通電及び非通電
に伴って弁部が一定開度で開閉するものを用いているた
め、リフトシリンダに給排される圧力油の単位時間当り
の流量は常に一定である。2. Description of the Related Art A solenoid valve for ascending that controls the supply of pressure oil to a lift cylinder of a work machine lifting mechanism and a solenoid valve for descending that controls the discharge of pressure oil from a lift cylinder are conventionally known as electromagnetic solenoid valves. Since the valve portion that opens and closes at a constant opening degree according to energization and de-energization is used, the flow rate of the pressure oil supplied to and discharged from the lift cylinder per unit time is always constant.
【０００３】このような弁を用いて耕深制御、所謂デプ
ス制御を行なう場合、ＯＮ，ＯＦＦの制御信号が制御部
から出力されるたびに全流量の圧力油が急激に供給又は
断たれるので、大きい衝撃が発生して乗員に不快感を与
える一方、耕深変動が生じて耕深が安定しない問題点が
ある。更に詳述すると、デプス制御では、リヤカバ−を
地面に摺接させてその上下回動を油圧昇降機構に電気的
にフィ−ドバックさせて耕深を一定に保つようにするも
のであるが、ＯＮ、ＯＦＦの信号がマイコンからなる制
御部から出力されると、油圧昇降機構の動きはぎくしゃ
くしたものとなり、場合によってはハンチングを起こす
ことがあった。特に、ロ−タリ耕耘装置を下げる方向に
信号が出された場合は、地面がロ−タリ耕耘装置の耕耘
部を受け止めるために大きな耕深変化は生じないが、ロ
−タリ耕耘装置を上昇させる方向の信号が出されたとき
には、負荷が抜ける方向であるため、全流量の圧力油が
僅かな間であっても流されるとロ−タリ耕耘装置が大き
く上昇してしまい、耕深が設定耕深から大きく外れると
いう不具合があった。When such a valve is used to perform the plowing depth control, that is, the so-called depth control, the pressure oil of the entire flow rate is suddenly supplied or cut off every time an ON / OFF control signal is output from the control section. However, there is a problem that a large impact is generated and an occupant feels uncomfortable, but the plowing depth varies and the plowing depth is unstable. More specifically, in depth control, the rear cover is slidably contacted with the ground and its vertical rotation is electrically fed back to the hydraulic lifting mechanism to keep the working depth constant. , OFF signal is output from the control unit composed of the microcomputer, the movement of the hydraulic lifting mechanism becomes jerky, and hunting may occur in some cases. In particular, when a signal is issued in the direction of lowering the rotary tiller, the ground receives the tilling part of the rotary tiller, so that a large change in the working depth does not occur, but the rotary tiller is raised. When the direction signal is output, the load is in the direction of unloading, so if the entire flow rate of pressure oil is flowed even for a short time, the rotary tiller will greatly rise, and the working depth will be set. There was a problem that it greatly deviated from the depth.
【０００４】[0004]
【課題を解決するための手段】この発明は前記の課題に
鑑みて提案するものであり、次のような技術的手段を講
じた。即ち、機体後部に連結したロ−タリ耕耘装置４の
リヤカバ−３３を上下回動させてその上下動作を油圧昇
降機構に電気的にフィ−ドバックさせて耕深制御を行な
うトラクタにおいて、制御部を構成するマイクロコンピ
ュ−タ２９の入力側に耕深を設定する耕深設定器２８と
耕耘部の耕深を検出する耕深検出器Ｓ2とを接続して設
け、該マイクロコンピュ−タ２９の出力側には、電気信
号の大きさに比例して流量が制御される上昇用比例ソレ
ノイド弁２６と下降用比例ソレノイド弁２２とを接続し
たことを特徴とするトラクタの作業機昇降制御装置の構
成とする。The present invention is proposed in view of the above problems, and the following technical means have been taken. That is, in the tractor that controls the working depth by rotating the rear cover 33 of the rotary tiller 4 connected to the rear of the machine body up and down to electrically feed back the vertical movement to the hydraulic lifting mechanism. A plowing depth setting device 28 for setting the plowing depth and a plowing depth detector S 2 for detecting the plowing depth of the tilling part are connected and provided on the input side of the constituting micro computer 29. On the output side, an ascending proportional solenoid valve 26 and a descending proportional solenoid valve 22 whose flow rate is controlled in proportion to the magnitude of an electric signal are connected, and the construction of a working machine lifting control device for a tractor. And
【０００５】[0005]
【実施例】以下、図面に示す実施例に基づいて、この発
明の実施例を説明する。図１に油圧制御回路を、図２に
作業機の使用状態の側面図を示したが、トラクタ１の左
右のロワ−リンク２，２と、トップリンク３の如きもの
からなるリンク機構に連結した作業機としてのロ−タリ
耕耘装置４を、作業機昇降機構５のリフトシリンダ６の
動作によってリフトア−ム７，７を昇降回動させてロ−
タリ耕耘装置４を上昇又は下降させるものである。この
実施例では、リフトシリンダ６とリフトア−ム７とで油
圧昇降機構を構成している。Embodiments of the present invention will be described below based on the embodiments shown in the drawings. The hydraulic control circuit is shown in FIG. 1 and a side view of the working machine in use is shown in FIG. 2. The hydraulic control circuit is connected to the left and right lower links 2 and 2 of the tractor 1 and a link mechanism such as a top link 3. The rotary tiller 4 serving as a working machine is rotated by rotating the lift arms 7 and 7 up and down by the operation of the lift cylinder 6 of the working machine lifting mechanism 5.
This is for raising or lowering the tarry tiller 4. In this embodiment, the lift cylinder 6 and the lift arm 7 constitute a hydraulic lifting mechanism.
【０００６】リフトシリンダ６に絞り弁８と油路９を介
して逆止弁１０の弁室１０ａを接続し、タンク１１に油
路１２を臨ませたパイロット弁１３を弁室１０ａへ油路
１４によって、又、逆止弁１０の背室１０ｂへ油路１５
によって夫々接続し、パイロット部１６ａに加わる圧力
に比例して弁孔の開口面積が制御されるようにした上昇
用弁１６を、弁室１０ａへ油路１７を介して接続し、電
磁ソレノイド部１８ａに流す制御電流の大きさに比例し
て弁孔の開口面積が制御されるようにした調整弁１８
を、油路１９を介して油圧ポンプ２０に、又、油路２１
を介してパイロット部１６ａに夫々接続し、電磁ソレノ
イド部２２ａに流す制御電流の大きさに比例して弁孔の
開口面積が制御されるようにした下降用比例ソレノイド
弁２２を、弁室１０ａへ油路２３にて、又、タンク１１
へ油路２４にて夫々接続し、油圧ポンプ２０へ油路２５
にて上昇用弁１６に接続して、上昇用弁１６及び調整弁
１８からなる上昇用比例ソレノイド弁２６を構成してい
る。The lift cylinder 6 is connected to the valve chamber 10a of the check valve 10 via the throttle valve 8 and the oil passage 9, and the pilot valve 13 with the oil passage 12 facing the tank 11 is moved to the valve chamber 10a. Also, the oil passage 15 is provided to the back chamber 10b of the check valve 10.
The ascending valves 16 connected to each other via the oil passages 17 so that the opening areas of the valve holes are controlled in proportion to the pressure applied to the pilot portion 16a are connected to the valve chamber 10a via the oil passage 17. Adjustment valve 18 in which the opening area of the valve hole is controlled in proportion to the magnitude of the control current flowing through the valve
To the hydraulic pump 20 via the oil passage 19 and the oil passage 21.
The proportional proportional solenoid valve 22 for lowering, which is connected to the pilot portion 16a via the solenoid valve and controls the opening area of the valve hole in proportion to the magnitude of the control current supplied to the electromagnetic solenoid portion 22a, is connected to the valve chamber 10a. In the oil passage 23, again, the tank 11
To the hydraulic pump 20 and the oil passage 25 to the hydraulic pump 20, respectively.
Is connected to the raising valve 16 to form a raising proportional solenoid valve 26 including the raising valve 16 and the adjusting valve 18.
【０００７】今、パイロット弁１３の電磁ソレノイド部
１３ａが非通電のときは、図１のように連通ポ−ト１３
ｂと油路１４，１５によって弁室１０ａと背室１０ｂが
連通するので、逆止弁１０の弁体１０ｃは、ばね１０ｄ
によって弁室１０ａを油路１７から遮断してリフトシリ
ンダ６内の圧力油を、この逆止弁１０によって保持する
中立状態となり、又、下降用比例ソレノイド弁２２の電
磁ソレノイド弁２２ａと調整弁１８の電磁ソレノイド部
１８ａは非通電となっている。Now, when the electromagnetic solenoid portion 13a of the pilot valve 13 is not energized, the communication port 13 as shown in FIG.
Since the valve chamber 10a and the back chamber 10b communicate with each other by b and the oil passages 14 and 15, the valve body 10c of the check valve 10 has the spring 10d.
The valve chamber 10a is cut off from the oil passage 17 by the check valve 10 and the pressure oil in the lift cylinder 6 is held by the check valve 10 in a neutral state. Further, the solenoid valve 22a of the proportional solenoid valve 22 for lowering and the adjusting valve 18 are provided. The electromagnetic solenoid portion 18a is non-energized.
【０００８】パイロット弁１３の電磁ソレノイド部１３
ａを通電すると、排油ポ−ト１３ｃが切り替わり、背室
１０ｂを油路１２を介してタンク１１に連通するので、
弁室１０ａに導かれているリフトシリンダ６の圧力油に
よって弁体１０ｃが開かれて油路９と油路２３が連通す
ることになり、下降用比例ソレノイド弁２２の電磁ソレ
ノイド部２２ａに通電すると、下げポ−ト２２ｂが油路
２３、２４を連通するので、リフトシリンダ６の圧力油
は絞り弁８、油路９、弁室１０ａ、油路２３、下げポ−
ト２２ｂ、油路２４を介してタンク１１に排出され、リ
フトピストン６ａがリフトシリンダ６に向って引込動作
するので、リフトア−ム７、７は自重によって下降回動
することになり、そして、電磁ソレノイド部２２ａの制
御電流の大きさに比例してこの下降用比例ソレノイド弁
２２の弁孔が開くので、制御電流に比例した流量でリフ
トシリンダ６から作動油が排出されて、リフトア−ム
７、７は制御電流に比例した速度で下降するものであ
り、又、この下降操作の際には、調整弁１８の電磁ソレ
ノイド部１８ａは非通電となっている。Electromagnetic solenoid 13 of pilot valve 13
When a is energized, the drain port 13c is switched and the back chamber 10b is communicated with the tank 11 via the oil passage 12,
The valve body 10c is opened by the pressure oil of the lift cylinder 6 guided to the valve chamber 10a so that the oil passage 9 and the oil passage 23 communicate with each other, and when the electromagnetic solenoid portion 22a of the descending proportional solenoid valve 22 is energized. , The lowering port 22b communicates with the oil passages 23 and 24, so that the pressure oil in the lift cylinder 6 receives the throttle valve 8, the oil passage 9, the valve chamber 10a, the oil passage 23, and the lowering port.
The lift arms 6 and 7 are discharged to the tank 11 through the valve 22b and the oil passage 24, and the lift piston 6a retracts toward the lift cylinder 6, so that the lift arms 7 and 7 are rotated downward by their own weight, and the electromagnetic Since the valve hole of the lowering proportional solenoid valve 22 opens in proportion to the magnitude of the control current of the solenoid portion 22a, the hydraulic oil is discharged from the lift cylinder 6 at a flow rate proportional to the control current, and the lift arm 7, 7 descends at a speed proportional to the control current, and the electromagnetic solenoid portion 18a of the regulating valve 18 is not energized during this descending operation.
【０００９】上昇用比例ソレノイド弁２６の調整弁１８
の電磁ソレノイド部１８ａは、非通電のときでは油路２
１が図１のようにタンク１１へ油路２７によって接続さ
れるが、電磁ソレノイド部１８ａに通電されると、調整
弁１８を介して油路１９が油路２１に接続されることに
なり、油圧ポンプ２０の圧力油は油路１９、調整弁１
８、油路２１を順次介してパイロット部１６ａに供給さ
れ、上昇用弁１６の上昇ポ−ト１６ｂが油路２５と油路
１７とを連通するので、ばね１０ｄに抗して弁体１０ｃ
が押し動かされ、油圧ポンプ２０から送り出された圧力
油は油路２５、１７、弁室１０ａ、油路９、バイパス路
８ａを介してリフトシリンダ６に供給され、リフトピス
トン６ａをリフトシリンダ６から突出させてリフトア−
ム７、７が上昇回動することになる。Adjustment valve 18 of proportional solenoid valve 26 for raising
The electromagnetic solenoid portion 18a of the
1 is connected to the tank 11 by the oil passage 27 as shown in FIG. 1, but when the electromagnetic solenoid 18a is energized, the oil passage 19 is connected to the oil passage 21 via the adjusting valve 18, The pressure oil of the hydraulic pump 20 is the oil passage 19 and the adjusting valve 1.
8 and the oil passage 21 are sequentially supplied to the pilot portion 16a, and the ascending port 16b of the ascending valve 16 connects the oil passage 25 and the oil passage 17 to each other, so that the valve body 10c is resisted against the spring 10d.
The pressure oil sent from the hydraulic pump 20 is supplied to the lift cylinder 6 via the oil passages 25 and 17, the valve chamber 10a, the oil passage 9 and the bypass passage 8a, and the lift piston 6a is moved from the lift cylinder 6 to the lift cylinder 6a. Lift and lift
The frames 7 and 7 will rotate upward.
【００１０】この場合、電磁ソレノイド部１８ａの制御
電流の大きさに比例して調整弁１８の弁孔を開くので、
制御電流に比例した流量の圧力油がパイロット部１６ａ
に供給され、パイロット部１６ａに供給されるこの流量
に比例して上昇ポ−ト１６ｂの弁孔が開かれるので、油
ポンプ２０の圧力油は、制御電流の大きさに比例した流
量がリフトシリンダ６に供給されることになる。In this case, since the valve hole of the adjusting valve 18 is opened in proportion to the magnitude of the control current of the electromagnetic solenoid portion 18a,
The pressure oil whose flow rate is proportional to the control current is pilot portion 16a.
The valve hole of the ascending port 16b is opened in proportion to this flow rate supplied to the pilot portion 16a, so that the pressure oil of the oil pump 20 has a flow rate proportional to the magnitude of the control current. 6 will be supplied.
【００１１】従って、制御電流の大きさに応じてリフト
ア−ム７、７の上昇速度が制御されるものである。作業
機昇降機構５の制御回路として図３に例示したものは、
昇降操作ダイヤル２８の回動操作によってその検出軸が
回動する回動型ポテンショメ−タの如きものからなる昇
降位置設定器Ｉと、リフトア−ム７の昇降動作によって
その検出軸が回動する回動型ポテンショメ−タの如きも
のからなる昇降位置センサＳ1を、マイクロコンピュ−
タ２９の入力装置３０を介して演算部３１に入力し、昇
降位置設定器Ｉの設定値に昇降位置センサＳ1にて検出
された検出値が一致するように、出力装置３２が圧力調
整弁１８と下降用比例ソレノイド弁２２の夫々の電磁ソ
レノイド部１８ａ、２２ａを制御するものであり、ここ
にポジションコントロ−ル系が構成される。Therefore, the rising speed of the lift arms 7, 7 is controlled according to the magnitude of the control current. The control circuit of the working machine lifting mechanism 5 illustrated in FIG.
The raising / lowering position setting device I made of a rotary potentiometer, whose detection shaft is turned by the turning operation of the raising / lowering operation dial 28, and the raising / lowering operation of the lift arm 7 turn the detecting shaft. Ascending / descending position sensor S 1 composed of a rotary potentiometer is used as a microcomputer.
The input device 30 of the input / output device 29 of the input / output device 29 is used to input the pressure control valve to the output device 32 so that the set value of the ascending / descending position setter I matches the detection value detected by the ascending / descending position sensor S 1 . 18 and the electromagnetic solenoid portions 18a and 22a of the lowering proportional solenoid valve 22 are controlled, and a position control system is configured here.
【００１２】また、この昇降操作ダイヤル２８による上
記昇降制御における昇降速度を調節するために、夫々回
動型ポテンショメ−タの如きものにて構成した上昇速度
設定器Ｕと下降速度設定器Ｄの抵抗値を調節することに
よって、電磁ソレノイド１８ａ、２２ａに流す制御電流
の大きさを調節するようにしている。次にデプス制御系
（耕深制御系）について説明する。デプス制御は、リヤ
カバ−３３の揺動によって地面の凹凸変化を捉え、これ
を上記マイクロコンピュ−タ２９にフィ−ドバックして
作業機を昇降制御させ、所定の耕深に維持させようとす
るものである。Further, in order to adjust the ascending / descending speed in the ascending / descending control by the ascending / descending operation dial 28, there are provided an ascending speed setting device U and a descending speed setting device D, each of which is composed of a rotary potentiometer. By adjusting the resistance value, the magnitude of the control current supplied to the electromagnetic solenoids 18a and 22a is adjusted. Next, the depth control system (plow depth control system) will be described. The depth control is intended to catch the unevenness of the ground by swinging the rear cover 33 and feed it back to the microcomputer 29 to control the working machine up and down to maintain a predetermined working depth. Is.
【００１３】このため、ロ−タリ耕耘装置４に取り付け
た耕深センサＳ2を入力装置３０に入力し、操作ダイヤ
ル２８による耕深設定値に耕深センサＳ2による耕深検
出値が一致するように調整弁１８と下降用比例ソレノイ
ド弁２２の夫々の弁を励磁してデプス制御を行なうもの
であって、この実施例では１つの設定器２８をポジショ
ンコントロ−ルとデプス制御とに兼用し、切替は切替ス
イッチ３４によって択一的に行なうようにしている。Therefore, the tilling depth sensor S 2 attached to the rotary tilling device 4 is input to the input device 30, and the tilling depth detection value by the tilling depth sensor S 2 coincides with the tilling depth setting value by the operation dial 28. As described above, the control valve 18 and the proportional lowering solenoid valve 22 are each excited to perform the depth control. In this embodiment, one setting device 28 is used for both the position control and the depth control. , Are selectively changed by the change-over switch 34.
【００１４】また、ロ−タリ耕耘装置４を下降すると
き、耕耘体３４の接地前から地表下のある深さに食い込
むまでの間、一時的に下降速度が緩やかとなるように制
御するため、昇降位置センサＳ1による検出値が或る範
囲に到達したとき、演算部３１のプログラムによって下
降用比例ソレノイド弁２２の制御電流を一時的に小さく
するように構成してデセラレ−ション機能が働くように
している。Further, when the rotary tiller 4 is lowered, the descending speed is controlled so as to be temporarily gentle from before the ground of the tiller 34 to when it digs into a certain depth under the ground. when the detection value by the vertical position sensor S 1 is reached in a range, and configured so as to reduce the control current of lowering proportional solenoid valve 22 temporarily by the computation unit 31 of the program Deserare - to Deployment function works I have to.
【００１５】斯くして、上記装置は電気信号の大きさを
調節することによってロ−タリ耕耘装置４の上昇速度及
び下降速度を自在に調節できるため、例えば、下降操作
の際にロ−タリ耕耘装置４の自重を考慮して緩やかな下
降速度とすることも、あるいは負荷の急激な増大による
エンストなどを防止するとともに、任意に制御された圧
力油はパイロット弁１３によって制御されている逆止弁
１０を介してリフトシリンダ６からの漏れがこの逆止弁
１０によって阻止され、正確な保持機能が確保されるこ
とになる。Thus, the above-mentioned device can freely adjust the rising speed and the descending speed of the rotary cultivating device 4 by adjusting the magnitude of the electric signal. Therefore, for example, during the lowering operation, the rotary cultivating device is used. A check valve in which the control valve is controlled by the pilot valve 13 while the gradual lowering speed is taken into consideration in consideration of the weight of the device 4 or stalling due to a sudden increase in load is prevented. Leakage from the lift cylinder 6 via 10 is blocked by this check valve 10 and an accurate holding function is ensured.
【００１６】なお、上昇用比例ソレノイド弁２６、下降
用比例ソレノイド弁２２、パイロット弁１３等の構造
は、図示例と同様な機能を有しているものであれば良
く、例えば上昇用比例ソレノイド弁２６は、調整弁１８
と上げ用弁１６を一体に設けたものでも良い。作業機昇
降機構５の制御回路は図３に例示したもののほか、種々
のものを用いることができる。The ascending proportional solenoid valve 26, the descending proportional solenoid valve 22, the pilot valve 13 and the like may have the same functions as those shown in the drawing, for example, the ascending proportional solenoid valve. 26 is a regulating valve 18
The valve 16 for raising and the valve 16 may be integrally provided. As the control circuit of the working machine lifting mechanism 5, various circuits can be used other than the one illustrated in FIG.
【００１７】[0017]
【発明の効果】この発明に係る作業機昇降制御装置は上
述のように構成したものであって、常に耕深設定器２８
による設定値と耕深検出用のセンサＳ2が検出した検出
値とを比較しながらその偏差に基づいて比例ソレノイド
弁に流す電流の大きさをコントロ−ルしてリフトシリン
ダ６への圧力油を供給制御し、或いは排出油を制御する
ものであるから微妙な昇降制御が可能になり、耕深調節
を精度良く行なえる。The working machine lifting control apparatus according to the present invention is constructed as described above, and the working depth setting device 28 is always provided.
Based on the deviation while comparing the set value by the sensor S 2 for detecting the working depth with the detected value, the magnitude of the current flowing through the proportional solenoid valve is controlled to supply pressure oil to the lift cylinder 6. Since the supply is controlled or the discharged oil is controlled, delicate elevation control can be performed, and the plowing depth can be adjusted accurately.
【００１８】特にこの発明によれば、リヤカバ−３３
が、耕深が深くなったことを検出したときに、従来装置
のようにロ−タリ耕耘装置４が急上昇してしまうことが
なく、微小な偏差の領域ではその偏差に応じてゆっくり
と上昇するので、耕深変動が少なく安定した耕深を確保
できる。また、その場合に、上昇用比例ソレノイド弁２
６が、制御電流の大きさに比例して流量制御する調整弁
１８と、該調整弁１８により開度調節される上昇弁１６
とで構成されていることにより、偏差に比例した流量制
御が確実に行われ、より一層安定した耕深制御が可能と
なった。Particularly according to the present invention, the rear cover 33
However, when it is detected that the plowing depth becomes deep, the rotary tilling device 4 does not suddenly rise unlike the conventional device, and slowly rises in accordance with the deviation in the area of a minute deviation. Therefore, it is possible to secure a stable tilling depth with little fluctuation in tilling depth. Further, in that case, the proportional solenoid valve 2 for raising
6 is an adjusting valve 18 for controlling the flow rate in proportion to the magnitude of the control current, and an ascending valve 16 whose opening is adjusted by the adjusting valve 18.
Since it is composed of and, the flow rate control proportional to the deviation is surely performed, and more stable plowing depth control becomes possible.
【図１】油圧制御回路図である。FIG. 1 is a hydraulic control circuit diagram.
【図２】使用状態の側面図である。FIG. 2 is a side view of a usage state.
【図３】制御ブロック図である。FIG. 3 is a control block diagram.
４ ロ−タリ耕耘装置 ６ リフトシリンダ １０ 逆止弁 １０ｂ 背室 １３ パイロット弁 １６ 上昇弁 １８ 調整弁 ２０ 油圧ポンプ ２２ 下降用比例ソレノイド弁 ２６ 上昇用比例ソレノイド弁 ２９ マイクロコンピュ−タ ３３ リヤカバ− 4 Rotary Tillage Device 6 Lift Cylinder 10 Check Valve 10b Back Chamber 13 Pilot Valve 16 Ascending Valve 18 Adjusting Valve 20 Hydraulic Pump 22 Proportional Solenoid Valve for Lowering 26 Proportional Solenoid Valve for Ascending 29 Micro Computer 33 Rear Cover
Claims (1)
リヤカバ−３３を上下回動させてその上下動作を油圧昇
降機構に電気的にフィ−ドバックさせて耕深制御を行な
うトラクタにおいて、制御部を構成するマイクロコンピ
ュ−タ２９の入力側に耕深を設定する耕深設定器２８と
耕耘部の耕深を検出する耕深検出器Ｓ2とを接続して設
け、該マイクロコンピュ−タ２９の出力側には、電気信
号の大きさに比例して流量が制御される上昇用比例ソレ
ノイド弁２６と下降用比例ソレノイド弁２２とを接続
し、前記上昇用比例ソレノイド弁２６を、制御電流の大
きさに比例して流量制御する調整弁１８と該調整弁１８
により開度調節される上昇弁１６とで構成したことを特
徴とするトラクタの作業機昇降制御装置。1. A tractor for controlling tillage depth by vertically rotating a rear cover 33 of a rotary tiller 4, which is connected to a rear portion of an airframe, to electrically feed back the vertical movement to a hydraulic lifting mechanism. On the input side of the micro computer 29 constituting the control unit, a plowing depth setting device 28 for setting the plowing depth and a plowing depth detector S 2 for detecting the plowing depth of the tilling part are connected and provided. A rising proportional solenoid valve 26 and a descending proportional solenoid valve 22 whose flow rate is controlled in proportion to the magnitude of the electric signal are connected to the output side of the controller 29, and the rising proportional solenoid valve 26 is controlled. Large current
Regulating valve 18 for controlling the flow rate in proportion to the magnitude and the regulating valve 18
A working machine lifting control device for a tractor, which comprises a rising valve 16 whose opening degree is adjusted by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5257903A JPH082B2 (en) | 1993-10-15 | 1993-10-15 | Tractor lift control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5257903A JPH082B2 (en) | 1993-10-15 | 1993-10-15 | Tractor lift control device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59154719A Division JPH0754121B2 (en) | 1984-07-25 | 1984-07-25 | Work implement lift control device for tractor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33667796A Division JPH09177708A (en) | 1996-12-17 | 1996-12-17 | Hydraulic controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06189605A JPH06189605A (en) | 1994-07-12 |
| JPH082B2 true JPH082B2 (en) | 1996-01-10 |
Family
ID=17312795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5257903A Expired - Lifetime JPH082B2 (en) | 1993-10-15 | 1993-10-15 | Tractor lift control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114439787B (en) * | 2022-01-28 | 2024-03-26 | 南京威孚金宁有限公司 | Tractor plow depth control hydraulic system and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122774A (en) * | 1980-02-26 | 1981-09-26 | Oirudoraibu Kogyo Kk | Oil pressure elevator |
| JPS5755362A (en) * | 1980-09-22 | 1982-04-02 | Futoshi Oki | Follow-up equipment |
| JPS58156643A (en) * | 1982-10-08 | 1983-09-17 | Kayaba Ind Co Ltd | Control on oil pressure of excavator |
| US4508176A (en) * | 1982-11-22 | 1985-04-02 | Deere & Company | Vehicle with control system having operator-actuable switch for storing parameter signal value to control vehicle-connected implement raising and lowering structure |
| JPH0754121B2 (en) * | 1984-07-25 | 1995-06-07 | 井関農機株式会社 | Work implement lift control device for tractor |
-
1993
- 1993-10-15 JP JP5257903A patent/JPH082B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06189605A (en) | 1994-07-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |