JPS61198347U - - Google Patents
Info
- Publication number
- JPS61198347U JPS61198347U JP8171085U JP8171085U JPS61198347U JP S61198347 U JPS61198347 U JP S61198347U JP 8171085 U JP8171085 U JP 8171085U JP 8171085 U JP8171085 U JP 8171085U JP S61198347 U JPS61198347 U JP S61198347U
- Authority
- JP
- Japan
- Prior art keywords
- lift
- control valve
- directional control
- oil
- tilt
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の構成を示す概要図、第２図は
本考案の第１の実施例を示す油圧回路図、第３図
は同じく第２の実施例を示す油圧回路図、第４図
は従来技術を示す概要図である。
１…リフトシリンダ、１ａ…上昇作動室、２…
リフトアーム、３…チルトシリンダ、３ｂ…後傾
作動室、４…アタツチメント、５…リフト用方向
切換弁、６…チルト用方向切換弁、８…タンク、
１７…分流器、１９…排油路、２１…導油路、Ｓ
２…戻りポート。
Fig. 1 is a schematic diagram showing the configuration of the present invention, Fig. 2 is a hydraulic circuit diagram showing the first embodiment of the invention, Fig. 3 is a hydraulic circuit diagram showing the second embodiment, and Fig. 4 FIG. 1 is a schematic diagram showing a conventional technique. 1... Lift cylinder, 1a... Lifting working chamber, 2...
Lift arm, 3... Tilt cylinder, 3b... Backward tilting working chamber, 4... Attachment, 5... Directional switching valve for lift, 6... Directional switching valve for tilt, 8... Tank,
17... Flow divider, 19... Oil drain path, 21... Oil guide path, S
2 ...Return port.
Claims (1)
ンダ１を伸縮させて支持枠３１に枢支したリフト
アーム２を昇降揺動させるとともに、チルト用方
向切換弁６の操作によりチルトシリンダ３を伸縮
させてリフトアーム２に枢支したアタツチメント
４を前後揺動させるように構成し、リフト用方向
切換弁５を下降位置に位置させ、チルト用方向切
換弁６を後傾位置に位置させた平行下降操作状態
では、リフトシリンダ１の上昇作動室１ａからリ
フト用方向切換弁５の戻りポートＳ２を経て戻さ
れる戻り油の一部を排出路１９からタンク８に排
出するとともに、その残部を導油路２１からチル
ト用方向切換弁６を介してチルトシリンダ３の後
傾作動室３ｂに圧入して、アタツチメント４が平
行下降する状態になるように構成した農用アタツ
チメント油圧駆動装置の平行下降装置において、 リフト用方向切換弁５の戻りポートＳ２に分流
器１７を介して排油路１９及び導油路２１を連通
し、戻りポートＳ２からの戻り油を常に所定の割
合で排油路１９と導油路２１とに分流するように
構成したことを特徴とする農用アタツチメント用
油圧駆動装置の平行下降装置。[Scope of Claim for Utility Model Registration] The lift cylinder 1 is expanded and contracted by operating the lift directional control valve 5, and the lift arm 2 pivotally supported on the support frame 31 is swung up and down, and by the operation of the tilt directional control valve 6. The tilt cylinder 3 is extended and contracted to swing the attachment 4 pivoted to the lift arm 2 back and forth, the lift directional control valve 5 is positioned at the lowered position, and the tilt directional control valve 6 is moved to the rearward position. In the parallel lower operation state in which the lift cylinder 1 is positioned, a part of the return oil returned from the lift operation chamber 1a of the lift cylinder 1 via the return port S2 of the lift directional control valve 5 is discharged from the discharge passage 19 to the tank 8, The remaining part of the oil is press-fitted into the backward tilting working chamber 3b of the tilt cylinder 3 from the oil guide path 21 via the tilt directional control valve 6, and the attachment 4 is moved downward in parallel. In the parallel lowering device, the return port S2 of the lift directional control valve 5 is connected to the oil drain path 19 and the oil guide path 21 via the flow divider 17, so that the return oil from the return port S2 is always kept at a predetermined ratio. A parallel lowering device for a hydraulic drive device for an agricultural attachment, characterized in that the oil is divided into an oil drain path 19 and an oil guide path 21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171085U JPS61198347U (en) | 1985-05-30 | 1985-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8171085U JPS61198347U (en) | 1985-05-30 | 1985-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61198347U true JPS61198347U (en) | 1986-12-11 |
Family
ID=30628748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8171085U Pending JPS61198347U (en) | 1985-05-30 | 1985-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61198347U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080812A (en) * | 2012-10-17 | 2014-05-08 | Sanyo Kiki Co Ltd | Hydraulic circuit of work machine |
-
1985
- 1985-05-30 JP JP8171085U patent/JPS61198347U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014080812A (en) * | 2012-10-17 | 2014-05-08 | Sanyo Kiki Co Ltd | Hydraulic circuit of work machine |
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