JPS61152576U - - Google Patents
Info
- Publication number
- JPS61152576U JPS61152576U JP3692385U JP3692385U JPS61152576U JP S61152576 U JPS61152576 U JP S61152576U JP 3692385 U JP3692385 U JP 3692385U JP 3692385 U JP3692385 U JP 3692385U JP S61152576 U JPS61152576 U JP S61152576U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- steering
- oil path
- lowering
- switching
- 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
- 238000010586 diagram Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Landscapes
- Transplanting Machines (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Description
第１図は本考案の油圧式操向装置を付設した乗
用田植機の全体側面図、第２図は本考案の油圧式
操向装置の油圧回路図、第３図は油圧バルブ装置
の平面図、第４図は同じく側面断面図、第５図は
第４図のタンデムセンター形油圧バルブ装置の回
路図、第６図は本考案の要部であるスプールのタ
イミングをずらした構成のうち、中立から油圧シ
リンダーの伸長方向への切換時の構成を示すスプ
ール部の拡大断面図、第７図は中立から油圧シリ
ンダー縮小方向への切換時のスプール拡大断面図
、第８図は中立時の拡大断面図である。
Ａ…操向用油圧バルブ装置、Ｂ…コンビネーシ
ヨンバルブ装置、Ｃ…作業機昇降用油圧装置、４
…ベルクランクアーム（ナツクルアーム操作部材
）、２３…油圧ポンプ。
Fig. 1 is an overall side view of a riding rice transplanter equipped with the hydraulic steering device of the present invention, Fig. 2 is a hydraulic circuit diagram of the hydraulic steering device of the present invention, and Fig. 3 is a plan view of the hydraulic valve device. , FIG. 4 is a side sectional view, FIG. 5 is a circuit diagram of the tandem center type hydraulic valve device shown in FIG. 4, and FIG. Fig. 7 is an enlarged sectional view of the spool section showing the configuration when switching from neutral to the hydraulic cylinder extension direction, Fig. 7 is an enlarged sectional view of the spool when switching from neutral to hydraulic cylinder contraction direction, and Fig. 8 is an enlarged sectional view when neutral. It is a diagram. A...Hydraulic valve device for steering, B...Combination valve device, C...Hydraulic device for lifting and lowering work equipment, 4
...Bell crank arm (knuckle arm operating member), 23...Hydraulic pump.
Claims (1)
圧装置を直列に配列し、更に操向用油圧バルブ装
置をタンデムセンター形としたものにおいて、操
向用油圧バルブのスプール切換時のタイミングを
ずらして、作業機昇降用油圧装置への油路と片ピ
ストンロツド式の操向用油圧シリンダーの両室へ
の油路が同時に連通しない構成としたことを特徴
とする農業機械の油圧式操向装置。 When the hydraulic pump, hydraulic steering device, and hydraulic device for raising and lowering work equipment are arranged in series, and the steering hydraulic valve device is of a tandem center type, the timing when switching the spool of the steering hydraulic valve is shifted. A hydraulic steering device for agricultural machinery, characterized in that an oil path to a hydraulic device for lifting and lowering a work machine and an oil path to both chambers of a single-piston rod type steering hydraulic cylinder are configured such that they do not communicate at the same time.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3692385U JPH0248292Y2 (en) | 1985-03-13 | 1985-03-13 | |
| US06/819,860 US4664210A (en) | 1985-01-19 | 1986-01-17 | Hydraulic steering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3692385U JPH0248292Y2 (en) | 1985-03-13 | 1985-03-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61152576U true JPS61152576U (en) | 1986-09-20 |
| JPH0248292Y2 JPH0248292Y2 (en) | 1990-12-18 |
Family
ID=30542558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3692385U Expired JPH0248292Y2 (en) | 1985-01-19 | 1985-03-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0248292Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6433471U (en) * | 1987-08-25 | 1989-03-01 | ||
| JPS6433470U (en) * | 1987-08-25 | 1989-03-01 |
-
1985
- 1985-03-13 JP JP3692385U patent/JPH0248292Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6433471U (en) * | 1987-08-25 | 1989-03-01 | ||
| JPS6433470U (en) * | 1987-08-25 | 1989-03-01 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0248292Y2 (en) | 1990-12-18 |
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