JPH0168706U - - Google Patents
Info
- Publication number
- JPH0168706U JPH0168706U JP1987164149U JP16414987U JPH0168706U JP H0168706 U JPH0168706 U JP H0168706U JP 1987164149 U JP1987164149 U JP 1987164149U JP 16414987 U JP16414987 U JP 16414987U JP H0168706 U JPH0168706 U JP H0168706U
- Authority
- JP
- Japan
- Prior art keywords
- check valve
- interposed
- oil passage
- passage check
- hydraulic cylinder
- 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
- 230000008602 contraction Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Lifting Devices For Agricultural Implements (AREA)
Description
第１図は縮小用油路へ圧油が送油された状態の
油圧回路図、第２図は伸長用油路へ圧油が送油さ
れた状態の油圧回路図、第３図は逆止弁６・７と
パイロツトピストン５の部分の中立時の断面図で
ある。
１…往復動油圧シリンダー１、１ａ…伸長用油
室、１ｂ…縮小用油室、２Ｌ・２Ｒ…リフトリン
ク、３…固定絞り、４…逆止弁ケース、５…パイ
ロツトピストン、５ａ…押動突起、５ｂ…第１の
押動突起、５ｃ…第２の押動突起、６…縮小用油
路逆止弁、７…伸長用油路逆止弁、Ａ１・Ａ２・
Ｂ１・Ｂ２…ポート。
Figure 1 is a hydraulic circuit diagram with pressure oil being sent to the contraction oil path, Figure 2 is a hydraulic circuit diagram with pressure oil being sent to the extension oil path, and Figure 3 is a check valve. FIG. 3 is a cross-sectional view of the valves 6 and 7 and the pilot piston 5 when they are in neutral. 1... Reciprocating hydraulic cylinder 1, 1a... Oil chamber for extension, 1b... Oil chamber for contraction, 2L/2R... Lift link, 3... Fixed throttle, 4... Check valve case, 5... Pilot piston, 5a... Pushing Protrusion, 5b...first pushing protrusion, 5c...second pushing protrusion, 6...oil passage check valve for contraction, 7...oil passage check valve for extension, A1・A2・
B1/B2...Port.
Claims (1)
ンダー１を左右のリフトリンク２Ｌ・２Ｒの内の
一方に介装し、角度センサーにより切換えられる
電磁制御弁Ｖと往復動油圧シリンダー１の間に、
伸長用油路逆止弁７と縮小用油路逆止弁６を介装
し、該逆止弁６・７の間に両者を選択開放するパ
イロツトピストン５を介装した構成において、該
パイロツトピストン５で縮小用油路逆止弁６を開
放させる際にその押動突起５ｃの外周とケース内
周との間で絞りが形成されるべく構成したことを
特徴とする農作業機の角度制御装置。 A reciprocating hydraulic cylinder 1 for variably adjusting the inclination of the agricultural machine is interposed in one of the left and right lift links 2L and 2R, and between an electromagnetic control valve V switched by an angle sensor and the reciprocating hydraulic cylinder 1,
In a configuration in which an extension oil passage check valve 7 and a contraction oil passage check valve 6 are interposed, and a pilot piston 5 is interposed between the check valves 6 and 7 for selectively opening both, the pilot piston 5. An angle control device for an agricultural working machine characterized in that when the reduction oil passage check valve 6 is opened in step 5, a restriction is formed between the outer periphery of the pushing projection 5c and the inner periphery of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987164149U JPH0168706U (en) | 1987-10-26 | 1987-10-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987164149U JPH0168706U (en) | 1987-10-26 | 1987-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0168706U true JPH0168706U (en) | 1989-05-08 |
Family
ID=31449505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987164149U Pending JPH0168706U (en) | 1987-10-26 | 1987-10-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0168706U (en) |
-
1987
- 1987-10-26 JP JP1987164149U patent/JPH0168706U/ja active Pending