JPH0293503U - - Google Patents
Info
- Publication number
- JPH0293503U JPH0293503U JP173289U JP173289U JPH0293503U JP H0293503 U JPH0293503 U JP H0293503U JP 173289 U JP173289 U JP 173289U JP 173289 U JP173289 U JP 173289U JP H0293503 U JPH0293503 U JP H0293503U
- Authority
- JP
- Japan
- Prior art keywords
- relief valve
- overload relief
- hydraulic piston
- chamber
- 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.)
- Pending
Links
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000003028 elevating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図は過負荷リリーフ弁１を油圧切換制御弁
の上げチエツク弁３の部分に装着した状態のバル
ブケースＶの展開断面図、第２図は異常電圧によ
り過負荷リリーフ弁１が開放された状態のバルブ
ケースＶの展開断面図、第３図は本考案の油圧回
路図である。
Ｖ…バルブケース、Ｓ…油圧ピストン室、１…
過負荷リリーフ弁、３…上げチエツク弁、４…メ
インスプール、１５…弁座体、２３…背室。
Figure 1 is an exploded sectional view of the valve case V with the overload relief valve 1 attached to the lift check valve 3 of the hydraulic switching control valve, and Figure 2 shows the overload relief valve 1 opened due to abnormal voltage. FIG. 3, which is a developed sectional view of the valve case V in this state, is a hydraulic circuit diagram of the present invention. V...Valve case, S...Hydraulic piston chamber, 1...
Overload relief valve, 3...lift check valve, 4...main spool, 15...valve seat body, 23...back chamber.
Claims (1)
ツク弁３の背室２３において、一定の規定圧力以
上の異常圧力が油圧ピストン室Ｓに掛けられた場
合に、背室２３内の圧油をタンク方向へ排出する
過負荷リリーフ弁１を設けたことを特徴とする油
圧式作業機昇降装置の過負荷リリーフ弁。 In the back chamber 23 of the lift check valve 3, which communicates only with the direction of the hydraulic piston chamber S, when abnormal pressure exceeding a certain specified pressure is applied to the hydraulic piston chamber S, the pressure oil in the back chamber 23 is directed toward the tank. An overload relief valve for a hydraulic working machine elevating device, characterized in that an overload relief valve 1 for discharging is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP173289U JPH0293503U (en) | 1989-01-11 | 1989-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP173289U JPH0293503U (en) | 1989-01-11 | 1989-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0293503U true JPH0293503U (en) | 1990-07-25 |
Family
ID=31201876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP173289U Pending JPH0293503U (en) | 1989-01-11 | 1989-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0293503U (en) |
-
1989
- 1989-01-11 JP JP173289U patent/JPH0293503U/ja active Pending