JPS632411U - - Google Patents
Info
- Publication number
- JPS632411U JPS632411U JP9610286U JP9610286U JPS632411U JP S632411 U JPS632411 U JP S632411U JP 9610286 U JP9610286 U JP 9610286U JP 9610286 U JP9610286 U JP 9610286U JP S632411 U JPS632411 U JP S632411U
- Authority
- JP
- Japan
- Prior art keywords
- tractor
- draft
- flow rate
- proportional solenoid
- solenoid valve
- 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
- 230000035945 sensitivity Effects 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
Description
図はこの考案の実施例を示し、第１図は側面図
、第２図はブロツク図、第３図は流量特性図であ
る。
符号の説明、１……トラクター、６，６……リ
フトアーム、７，７……ロワーリンク、９……ト
ツプリンク、１０……プラウ、１２……上昇用比
例ソレノイド弁、１３……下降用比例ソレノイド
弁、２０……ドラフト感度切換スイツチ。
The figures show an embodiment of this invention; FIG. 1 is a side view, FIG. 2 is a block diagram, and FIG. 3 is a flow characteristic diagram. Explanation of symbols: 1...Tractor, 6,6...Lift arm, 7,7...Lower link, 9...Top link, 10...Plow, 12...Proportional solenoid valve for lifting, 13...For lowering Proportional solenoid valve, 20...Draft sensitivity selection switch.
Claims (1)
ノイド弁１３からなる電気制御式コントロール弁
を備えたトラクターにおいて、トラクター１の後
上部には油圧昇降用のリフト装置を設け、３点リ
ンク機構を介してプラウ１０を昇降自在に連結し
、プラム１０からのドラフト信号を検出するドラ
フトセンサー１１を機体の後部に設置し、ドラフ
ト設定値と検出値とを対比しながら上記コントロ
ール弁を制御する制御部１８を設け、この制御部
１８には、不感帯の巾、初期流量、流量特性カー
ブのそれぞれ異なる要因の組み合わせによつて決
定される感度を択一的に切換える感度選択機構２
０を設けたことを特徴とするトラクターの油圧制
御装置。 In a tractor equipped with an electrically controlled control valve consisting of an ascending proportional solenoid valve 12 and a descending proportional solenoid valve 13, a lift device for hydraulic elevation is provided at the rear upper part of the tractor 1, and the plow is operated via a three-point linkage mechanism. A draft sensor 11 for detecting a draft signal from the plum 10 is installed at the rear of the fuselage, and a control section 18 is provided for controlling the control valve while comparing the draft setting value and the detected value. , this control unit 18 includes a sensitivity selection mechanism 2 that selectively switches the sensitivity determined by a combination of different factors such as the width of the dead zone, the initial flow rate, and the flow rate characteristic curve.
1. A hydraulic control device for a tractor, characterized in that a 0 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9610286U JPH0545129Y2 (en) | 1986-06-23 | 1986-06-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9610286U JPH0545129Y2 (en) | 1986-06-23 | 1986-06-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS632411U true JPS632411U (en) | 1988-01-09 |
| JPH0545129Y2 JPH0545129Y2 (en) | 1993-11-17 |
Family
ID=30961474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9610286U Expired - Lifetime JPH0545129Y2 (en) | 1986-06-23 | 1986-06-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0545129Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02222602A (en) * | 1989-01-06 | 1990-09-05 | Deere & Co | Controlling device for vehicle |
-
1986
- 1986-06-23 JP JP9610286U patent/JPH0545129Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02222602A (en) * | 1989-01-06 | 1990-09-05 | Deere & Co | Controlling device for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0545129Y2 (en) | 1993-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS632411U (en) | ||
| JPH0437376Y2 (en) | ||
| JPS633702A (en) | Control display device of tractor | |
| JP2692663B2 (en) | Hydraulic control of tractor | |
| JPH0536325Y2 (en) | ||
| JPH086408Y2 (en) | Downward speed control device for ground work machine | |
| JPS6338721U (en) | ||
| JP2512955B2 (en) | Ground work machine lifting control | |
| JP2508663B2 (en) | Down valve cutting device for ground work machine | |
| JP2775072B2 (en) | Lifting and lowering control device for the working part in the working vehicle | |
| JPS6338731Y2 (en) | ||
| JPS63109710U (en) | ||
| JPS6326204U (en) | ||
| JPH03108311U (en) | ||
| JPH032Y2 (en) | ||
| JPS62202117U (en) | ||
| JPH084403B2 (en) | Work mode switching device for ground work equipment | |
| JPH03105206U (en) | ||
| JPH0236922U (en) | ||
| JPS62104615U (en) | ||
| JPS6310813U (en) | ||
| JPS632413U (en) | ||
| JPS6353207U (en) | ||
| JPS62186605U (en) | ||
| JPH07284311A (en) | Control device for elevating planting part of rice transplanter |