JPH0349962Y2 - - Google Patents
Info
- Publication number
- JPH0349962Y2 JPH0349962Y2 JP19552384U JP19552384U JPH0349962Y2 JP H0349962 Y2 JPH0349962 Y2 JP H0349962Y2 JP 19552384 U JP19552384 U JP 19552384U JP 19552384 U JP19552384 U JP 19552384U JP H0349962 Y2 JPH0349962 Y2 JP H0349962Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure oil
- port
- valve
- state
- supplied
- 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
Links
- 238000000605 extraction Methods 0.000 claims description 15
- 239000003921 oil Substances 0.000 description 70
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
- Fluid-Pressure Circuits (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、圧油をリフトアーム昇降用ポートに
供給する第１状態と圧油をアタツチメント駆動用
ポートに供給し、且つ、アタツチメント駆動後圧
油受入ポートに還元される圧油を前記リフトアー
ム昇降用ポートに供給する第２状態に切換自在な
動力取出バルブを設けたトラクタの油圧装置に関
する。[Detailed description of the invention] [Field of industrial application] The present invention provides a first state in which pressure oil is supplied to the port for lifting the lift arm, a first state in which pressure oil is supplied to the attachment drive port, and a state in which pressure oil is supplied to the attachment drive port. The present invention relates to a hydraulic system for a tractor provided with a power take-off valve that can be switched to a second state for supplying pressure oil returned to the oil receiving port to the lift arm lifting port.
かかるトラクタの油圧装置においては、１つの
油圧ポンプからの圧油を利用して、リフトアーム
を昇降駆動するのみならず、車体前部に排土板を
昇降自在に取付けたり、車体の下腹部にモアを昇
降自在に取付けることができるようにしたもので
ある。
In the hydraulic system of such a tractor, the pressure oil from one hydraulic pump is used not only to drive the lift arm up and down, but also to attach an earth removal plate to the front of the vehicle body so that it can be raised and lowered, This allows the mower to be mounted so that it can be moved up and down.
ところで、トラクタでは、軟弱地等でのステア
リング操作を軽快に行なえるように、パワーステ
アリング装置を装備したいこともある。 By the way, it is sometimes desirable to equip a tractor with a power steering device so that steering operations can be performed easily on soft ground and the like.
このため、アタツチメント駆動用ポートからの
圧油が供給されるフロープライオリテイバルブ
を、動力取出バルブのアタツチメント駆動用ポー
トに配管によつて接続して設け、そのフロープラ
イオリテイバルブからの制御側圧油をパワーステ
アリング装置に供給すると共に、フロープライオ
リテイバルブからの余剰側圧油をアタツチメント
装置に供給し、且つ、アタツチメント駆動後還元
される圧油を動力取出バルブの圧油受入ポートに
供給する状態と前記余剰側圧油を前記圧油受入ポ
ートに短絡供給する状態とに切換えるための切換
弁を、前記フロープライオリテイバルブ及び前記
動力取出バルブの夫々に配管によつて接続して設
けるようにしていた。 For this reason, a flow priority valve to which pressure oil is supplied from the attachment drive port is connected to the attachment drive port of the power take-off valve via piping, and the control side pressure oil is supplied from the flow priority valve. A state in which the excess pressure oil from the flow priority valve is supplied to the power steering device, the excess side pressure oil from the flow priority valve is supplied to the attachment device, and the pressure oil returned after the attachment is driven is supplied to the pressure oil receiving port of the power take-off valve. A switching valve for switching to a state in which side pressure oil is short-circuited and supplied to the pressure oil receiving port is connected to each of the flow priority valve and the power take-off valve by piping.
しかしながら、上記の従来手段によると、フロ
ープライオリテイバルブ及び切換弁を各別に組付
けねばならず、しかも、両者を配管にて接続する
作業、及び、両者夫々を動力取出バルブに対して
配管によつて接続する作業を要するため、パワー
ステアリング装置を必要に応じて組付けること
が、多大な手数を要する煩わしい作業となるもの
であつた。
However, according to the above conventional means, it is necessary to assemble the flow priority valve and the switching valve separately, and furthermore, it is necessary to connect them with piping, and to connect each of them to the power take-off valve by piping. Since it is necessary to connect the power steering device, it is a troublesome work that requires a lot of effort to assemble the power steering device as necessary.
本考案は、上記実情に鑑みてなされたものであ
つて、その目的は、必要に応じてパワーステアリ
ングタイプに切換えることを簡単な作業で行なえ
るようにする点にある。 The present invention has been developed in view of the above-mentioned circumstances, and its purpose is to make it possible to easily switch to a power steering type as needed.
本考案の特徴構成は、前記動力取出バルブの第
２状態において前記アタツチメント駆動用ポート
からの圧油が供給されるフロープライオリテイバ
ルブ、そのバルブからの制御側圧油を吐出するア
タツチメント駆動用第１サービスポート、前記フ
ロープライオリテイバルブからの余剰側圧油を吐
出するアタツチメント駆動用第２サービスポー
ト、そのポートから吐出されてアタツチメント駆
動後還元される圧油を受入れる第３サービスポー
ト、及び、前記余剰側圧油を第２サービスポート
に供給し、且つ、第３サービスポートからの圧油
を前記圧油受入ポートに供給する状態と前記余剰
側圧油を前記圧油受入ポートに短絡供給する状態
とに切換えるための切換弁の夫々を備えた圧油取
出用ブロツクを、前記動力取出バルブに着脱自在
に設けてある点にあり、その作用及び効果は次の
通りである。
The characteristic configuration of the present invention includes a flow priority valve to which pressure oil is supplied from the attachment drive port in the second state of the power take-off valve, and a first service for attachment drive that discharges control-side pressure oil from the valve. a second service port for driving an attachment that discharges surplus side pressure oil from the flow priority valve, a third service port that receives pressure oil discharged from the port and returned after driving the attachment, and the surplus side pressure oil. is supplied to the second service port, and for switching between a state in which pressure oil from a third service port is supplied to the pressure oil receiving port and a state in which the surplus side pressure oil is short-circuited and supplied to the pressure oil receiving port. A pressure oil take-off block having each of the switching valves is removably attached to the power take-off valve, and its functions and effects are as follows.
すなわち、フロープライオリテイバルブ及び切
換弁等を備えるようにユニツト化された圧油取出
用ブロツクを、動力取出バルブに組付けるだけ
で、リフトアームを昇降駆動すること及び必要に
応じて装着されるアタツチメントを駆動すること
を行なえるようにしながらも、パワーステアリン
グ装置をも駆動することができるのである。
In other words, by simply assembling the pressure oil take-off block, which is unitized to include a flow priority valve, a switching valve, etc., to the power take-off valve, the lift arm can be moved up and down, and the attachments installed as necessary. In this way, it is possible to drive a power steering device while also being able to drive a power steering device.
したがつて、パワーステアリングタイプに改造
するために圧油を取出すことを、圧油取出用ブロ
ツクを組付けるだけで簡単に行なえるのであり、
もつて、使用目的等に応じてパワーステアリング
タイプに改造する作業を容易、迅速に行なえるト
ラクタの油圧装置を得るに至つた。
Therefore, taking out the pressure oil for remodeling to a power steering type can be done easily by simply assembling the pressure oil removal block.
As a result, we have achieved a tractor hydraulic system that can be easily and quickly modified to a power steering type depending on the purpose of use.
以下に、本考案の実施例を図面に基いて説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
第８図に示すように、原動部１及び運転部２等
を有した車輪式走行機体の前部に、芝刈り装置等
の各種作業装置を昇降操作自在に連結するための
上下に駆動揺動自在なリンク機構３を取外し自在
に付設し、さらに、前記走行機体の後部に、ロー
タリ耕耘装置等の各種作業装置を昇降操作自在に
連結するための上下に駆動揺動自在なリフトアー
ム４、及び、連結作業装置に伝動するための動力
取出し軸５を付設すると共に、前記走行機体の中
央運転部２に、ステアリングハンドルＨ、及び、
運転座席Ｓを付設し、もつて、農用トラクタを構
成してある。 As shown in Fig. 8, the front part of a wheeled traveling body having a driving part 1, a driving part 2, etc. is used to connect various working devices such as a lawn mower so that they can be moved up and down. A lift arm 4 is provided with a freely removable link mechanism 3 and is movable up and down to connect various working devices such as a rotary tiller to the rear of the traveling machine so as to be able to move up and down. , a power take-off shaft 5 for transmitting power to the connecting work device is attached, and a steering handle H and a
A driver's seat S is attached to form an agricultural tractor.
第１図及び第８図に示すように、リンク機構３
を、複動油圧シリンダ６によつて揺動駆動及び固
定するように構成し、リフトアーム４を、走行用
トランスミツシヨンケース７の上部に装備した単
動油圧シリンダ８によつて揺動駆動及び固定する
ように構成し、又、ステアリングハンドルＨに操
作される複動油圧シリンダ９によつて車輪を向き
変更操作する、いわゆるパワーステアリングを行
なえるように構成してあり、以下各部の構成につ
いて詳述する。 As shown in FIGS. 1 and 8, the link mechanism 3
The lift arm 4 is configured to be swing-driven and fixed by a double-acting hydraulic cylinder 6, and the lift arm 4 is swing-driven and fixed by a single-acting hydraulic cylinder 8 mounted on the upper part of the traveling transmission case 7. It is configured to be fixed, and is also configured to perform so-called power steering in which the direction of the wheels is changed by a double-acting hydraulic cylinder 9 operated by a steering handle H.The configuration of each part will be described in detail below. Describe.
すなわち、第１図、及び、第３図乃至第５図に
示すように、トランスミツシヨンケース７から内
部潤滑油を取り出すように、トランスミツシヨン
ケース７の取出し部に管路１０を介して接続した
油圧ポンプＰを、エンジン１１の横側部に連動連
結すると共に、前記ポンプＰからの圧油をリフト
アーム昇降用ポートａ１に供給する第１状態と前
記ポンプＰからの圧油をアタツチメント（リンク
機構）駆動用ポートａ２に供給し、且つ、アタツ
チメント駆動後圧油受入ポートａ３に還元される
圧油を前記リフトアーム昇降用ポートａ１に供給
する第２状態とに切換自在な動力取出バルブＶ１
を、前記ポンプＰに管路１２を介して接続してあ
る。そして、前記動力取出バルブＶ１の第２状態
において前記アタツチメント駆動用ポートａ２か
らの圧油が供給されるフロープライオリテイバル
ブＶ２、そのバルブＶ２からの制御側圧油を吐出
するアタツチメント駆動用第１サービスポートａ
４、前記フロープライオリテイバルブＶ２からの
余剰側圧油を吐出するアタツチメント駆動用第２
サービスポートａ５、そのポートａ５から吐出さ
れてアタツチメント駆動後還元される圧油を受入
れる第３サービスポートａ６、及び、前記余剰側
圧油を第２サービスポートａ５に供給し、且つ、
第３サービスポートａ６からの圧油を前記圧油受
入ポートａ３に供給する状態と前記余剰側圧油を
圧油受入ポートａ３に短絡供給する状態とに切換
えるための切換弁Ｖ３の夫々を備えた圧油取出用
ブロツクＡを、前記動力取出バルブＶ１に着脱自
在に接続し、さらに、前記圧油取出用ブロツクＡ
における第１サービスポートａ４に、パワーステ
アリング用シリンダ９に対する電磁式のコントロ
ールバルブ１３の給油管１４を、且つ、第２及び
第３サービスポートａ５及びａ６に、リンク機構
用シリンダ６に対するコントロールバルブ１５の
給油管１６ａ及び戻り油管１６ｂを、夫々接続す
ると共に、前記戻り油管１６ｂからの戻り圧油に
よりリフトアーム４を昇降させるためのコントロ
ールバルブ１７、リフトアーム４を緩速下降させ
るための絞り弁付戻し路１８、リリーフ弁１９等
を備えさせてある単動シリンダ８用コントロール
バルブユニツト２０に対する給油管２１を、動力
取出バルブＶ１のリフトアーム昇降用ポートａ１
に接続し、もつて、トランスミツシヨンケース７
に内装してある潤滑油が各シリンダ６，８，９
夫々に作動油として供給されるように構成してあ
る。ちなみに、パワーステアリング装置を取外し
た際、すなわち圧油取出用ブロツクを取外した際
には、第２図に示すように、前記各管１６ａ，１
６ｂ，２１を前記動力取出バルブＶ１に直接接続
することは勿論である。 That is, as shown in FIG. 1 and FIGS. 3 to 5, a connection is made to an extraction portion of the transmission case 7 via a conduit 10 so as to take out the internal lubricating oil from the transmission case 7. A hydraulic pump P is interlocked and connected to the side part of the engine 11, and the pressure oil from the pump P is connected to the attachment (link Mechanism) A power take-off valve V1 that can be freely switched to a second state that supplies pressure oil to the drive port a2 and returns to the pressure oil receiving port a3 after driving the attachment to the lift arm lifting port a1.
is connected to the pump P via a conduit 12. In the second state of the power take-off valve V1, there is a flow priority valve V2 to which pressure oil is supplied from the attachment drive port a2, and a first service port for attachment drive that discharges control side pressure oil from the valve V2. a
4. A second attachment drive unit that discharges surplus side pressure oil from the flow priority valve V2.
A service port a5, a third service port a6 that receives the pressure oil discharged from the port a5 and returned after driving the attachment, and supplies the surplus side pressure oil to the second service port a5, and
A pressurizer equipped with a switching valve V3 for switching between a state in which pressure oil from the third service port a6 is supplied to the pressure oil receiving port a3 and a state in which surplus side pressure oil is short-circuited and supplied to the pressure oil receiving port a3. An oil extraction block A is removably connected to the power extraction valve V1, and the pressure oil extraction block A is connected to the power extraction valve V1.
The oil supply pipe 14 of the electromagnetic control valve 13 for the power steering cylinder 9 is connected to the first service port a4, and the control valve 15 for the link mechanism cylinder 6 is connected to the second and third service ports a5 and a6. A control valve 17 for connecting the oil supply pipe 16a and a return oil pipe 16b, and for raising and lowering the lift arm 4 using return pressure oil from the return oil pipe 16b, and a return valve with a throttle valve for slowly lowering the lift arm 4. The oil supply pipe 21 for the control valve unit 20 for the single-acting cylinder 8, which is equipped with a passage 18, a relief valve 19, etc., is connected to the lift arm lifting port a1 of the power take-off valve V1.
Connect it to the transmission case 7.
The lubricating oil inside each cylinder 6, 8, 9
The structure is such that hydraulic oil is supplied to each of them. Incidentally, when the power steering device is removed, that is, when the pressure oil extraction block is removed, each of the pipes 16a, 1 is removed as shown in FIG.
6b, 21 can of course be directly connected to the power take-off valve V1.
尚、前記フロープライオリテイバルブＶ２は、
ポンプＰからの吐出量のうち一定量をパワーステ
アリング装置駆動側に吐出すると共に、その残量
をアタツチメント駆動側に吐出するように構成さ
れるものである。 Note that the flow priority valve V2 is
The pump P is configured to discharge a certain amount of the discharge amount from the pump P to the drive side of the power steering device, and to discharge the remaining amount to the drive side of the attachment.
前記切換弁Ｖ３について説明を加えれば、この
弁Ｖ３を、前記フロープライオリテイバルブＶ２
の余剰側圧油を前記圧油受入ポートａ３に短絡供
給する油路２２を開閉するように設けてあり、そ
して、前記油路２２の弁配置箇所よりも流路下手
側部分を、前記第３サービスポートａ６に対して
補助油路２２ａにて接続してある。従つて、切換
弁Ｖ３によつて油路２２を閉じれば、余剰側圧油
を第２サービスポートａ５に供給し、且つ、第３
サービスポートａ６からの圧油を圧油受入ポート
ａ３に供給する状態がもたらされ、又、切換弁Ｖ
３によつて油路２２を開き、且つ、第２、第３サ
ービスポートａ５，ａ６をプラグ２３，２４によ
つて閉塞すれば、余剰側圧油を圧油受入ポートａ
３に短絡供給する状態がもたらされることにな
る。 To further explain the switching valve V3, this valve V3 is connected to the flow priority valve V2.
The oil passage 22 is provided to open and close the oil passage 22 that short-circuits excess side pressure oil to the pressure oil receiving port a3, and a portion of the oil passage 22 on the downstream side of the valve arrangement location is connected to the third service. It is connected to port a6 through an auxiliary oil passage 22a. Therefore, if the oil passage 22 is closed by the switching valve V3, surplus side pressure oil is supplied to the second service port a5, and the third
A state is brought about in which the pressure oil from the service port a6 is supplied to the pressure oil receiving port a3, and the switching valve V
3 opens the oil passage 22 and closes the second and third service ports a5 and a6 with the plugs 23 and 24, excess side pressure oil is transferred to the pressure oil receiving port a.
This will result in a short-circuit supply condition to 3.
第６図及び第７図に示すように、前記運転座席
Ｓを装着するに、機体側のレール２７に対して前
後スライド調節自在に嵌合するスライド部材２８
に、座席Ｓの前端部を横軸芯周りに回動自在に枢
支すると共に、座席後端部を受止めるクツシヨン
用スプリング２９を、スライド部材２８に付設
し、もつて、例えば走行中に変速レバーが作業者
にとつて操作しやすい位置となるように、座席Ｓ
を前後にスライド調節できるように、又、作業終
了後、ハンドルを保護のためあるいは雨などによ
り前記シートＳに水が留まることを防止するため
に、前記座席Ｓをその背もたれ部がハンドルＨを
覆う傾斜姿勢に変更できるように構成している。
そして、座席Ｓを前方側に移動させて、つまり、
変速レバー付近で回転させた場合に、変速レバー
に前記座席Ｓが接当してレバー操作が不測に行な
われてしまい、その結果、エンジン始動時に車体
が不測に移動してしまう危険があつたため、前記
座席Ｓの下部にＬ字状の棒２５を取付けると共
に、その棒２５に挿脱自在な枠体２６を車体側に
ボルトにより取付けて、もつて、前記シートＳが
前方に移動された場合において前記棒２５を前記
枠体２６に挿入させて、前記シートＳの回転を阻
止するようにしてある。 As shown in FIGS. 6 and 7, when the driver's seat S is installed, a slide member 28 fits into the rail 27 on the aircraft body side so that it can be slid forward and backward.
In addition, a cushion spring 29 for supporting the front end of the seat S so as to be rotatable about a horizontal axis and for receiving the rear end of the seat is attached to the slide member 28, so that, for example, the speed can be changed while driving. Place the seat S so that the lever is in a position that is easy for the worker to operate.
The backrest of the seat S covers the handle H so that the seat S can be slid back and forth, and after work is finished, to protect the handle or to prevent water from remaining on the seat S due to rain, etc. It is configured so that it can be changed to a tilted position.
Then, move the seat S to the front side, that is,
If the shift lever was rotated near the shift lever, the seat S would come into contact with the shift lever, causing the lever to be operated unexpectedly, and as a result, there was a risk that the vehicle body would move unexpectedly when the engine was started. An L-shaped rod 25 is attached to the lower part of the seat S, and a removable frame 26 is attached to the rod 25 with bolts to the vehicle body, so that when the seat S is moved forward. The rod 25 is inserted into the frame 26 to prevent the seat S from rotating.
前記実施例では圧油取出用ブロツクＡに備えさ
せる切換弁Ｖ３を構成するに、プラグ２３，２４
を併用しながら圧油供給状態を切換えるものをし
たが、第９図に示すように、その弁Ｖ３のみによ
つて圧油供給状態を切換えることができるように
構成してもよい。
In the embodiment described above, the plugs 23 and 24 constitute the switching valve V3 provided in the pressure oil extraction block A.
Although the pressure oil supply state is switched by using the valve V3 in combination, as shown in FIG. 9, the pressure oil supply state may be changed only by the valve V3.
図面は本考案に係るトラクタの油圧装置の実施
例を示し、第１図は圧油取出用ブロツクを取付け
た状態の油圧回路図、第２図は圧油取出用ブロツ
クを外した状態の油圧回路図、第３図は圧油取出
用ブロツクの正面図、第４図及び第５図は第３図
におけるＡ−Ａ線及びＢ−Ｂ線矢視図、第６図は
座席の側面図、第７図はその一部切欠正面図、第
８図はトラクタの全体側面図、第９図は別実施例
を示す圧油取出用ブロツクの油圧回路図である。
ａ１……リフトアーム昇降用ポート、ａ２……
アタツチメント駆動用ポート、ａ３……圧油受入
ポート、ａ４……第１サービスポート、ａ５……
第２サービスポート、ａ６……第３サービスポー
ト、Ａ……圧油取出用ブロツク、Ｖ１……動力取
出バルブ、Ｖ２……フロープライオリテイバル
ブ、Ｖ３……切換弁。
The drawings show an embodiment of the hydraulic system for a tractor according to the present invention. Figure 1 is a hydraulic circuit diagram with a pressure oil extraction block installed, and Figure 2 is a hydraulic circuit diagram with the pressure oil extraction block removed. 3 is a front view of the pressure oil extraction block, FIGS. 4 and 5 are views taken along the A-A and B-B lines in FIG. 3, and FIG. 6 is a side view of the seat. FIG. 7 is a partially cutaway front view, FIG. 8 is an overall side view of the tractor, and FIG. 9 is a hydraulic circuit diagram of a pressure oil extraction block showing another embodiment. a1... Lift arm lifting port, a2...
Attachment drive port, a3...pressure oil receiving port, a4...first service port, a5...
2nd service port, a6...Third service port, A...Pressure oil extraction block, V1...Power extraction valve, V2...Flow priority valve, V3...Switching valve.
Claims (1)
る第１状態と圧油をアタツチメント駆動用ポート
ａ２に供給し、且つ、アタツチメント駆動後圧油
受入ポートａ３に還元される圧油を前記リフトア
ーム昇降用ポートａ１に供給する第２状態に切換
自在な動力取出バルブＶ１を設けたトラクタの油
圧装置であつて、前記動力取出バルブＶ１の第２
状態において前記アタツチメント駆動用ポートａ
２からの圧油が供給されるフロープライオリテイ
バルブＶ２、そのバルブＶ２からの制御側圧油を
吐出するアタツチメント駆動用第１サービスポー
トａ４、前記フロープライオリテイバルブＶ２か
らの余剰側圧油を吐出するアタツチメント駆動用
第２サービスポートａ５、そのポートａ５から吐
出されてアタツチメント駆動後還元される圧油を
受入れる第３サービスポートａ６、及び、前記余
剰側圧油を第２サービスポートａ５に供給し、且
つ、第３サービスポートａ６からの圧油を前記圧
油受入ポートａ３に供給する状態と前記余剰側圧
油を前記圧油受入ポートａ３に短絡供給する状態
とに切換えるための切換弁Ｖ３の夫々を備えた圧
油取出用ブロツクＡを、前記動力取出バルブＶ１
に着脱自在に設けてあるトラクタの油圧装置。 A first state in which pressure oil is supplied to the port a1 for lifting the lift arm, and a first state in which pressure oil is supplied to the attachment drive port a2, and the pressure oil returned to the pressure oil receiving port a3 after driving the attachment is used for lifting the lift arm. A hydraulic system for a tractor is provided with a power take-off valve V1 that can be freely switched to a second state for supplying power to a port a1, wherein the second state of the power take-off valve V1 is
In the state, the attachment drive port a
a flow priority valve V2 to which pressure oil is supplied from the flow priority valve V2; a first service port a4 for driving an attachment that discharges control side pressure oil from the valve V2; an attachment that discharges surplus side pressure oil from the flow priority valve V2. A second service port a5 for driving, a third service port a6 that receives the pressure oil discharged from the port a5 and returned after driving the attachment, and a third service port a6 that supplies the surplus side pressure oil to the second service port a5, and 3. A pressure control valve equipped with a switching valve V3 for switching between a state in which the pressure oil from the service port a6 is supplied to the pressure oil reception port a3 and a state in which the surplus side pressure oil is short-circuited and supplied to the pressure oil reception port a3. The oil extraction block A is connected to the power extraction valve V1.
The tractor's hydraulic system is removably installed on the tractor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19552384U JPH0349962Y2 (en) | 1984-12-24 | 1984-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19552384U JPH0349962Y2 (en) | 1984-12-24 | 1984-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61108662U JPS61108662U (en) | 1986-07-10 |
| JPH0349962Y2 true JPH0349962Y2 (en) | 1991-10-24 |
Family
ID=30753120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19552384U Expired JPH0349962Y2 (en) | 1984-12-24 | 1984-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0349962Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5094787B2 (en) * | 2009-06-15 | 2012-12-12 | 株式会社クボタ | Tractor hydraulic system |
| JP5097170B2 (en) * | 2009-06-15 | 2012-12-12 | 株式会社クボタ | Tractor |
-
1984
- 1984-12-24 JP JP19552384U patent/JPH0349962Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61108662U (en) | 1986-07-10 |
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