JPH03108889U - - Google Patents
Info
- Publication number
- JPH03108889U JPH03108889U JP1612190U JP1612190U JPH03108889U JP H03108889 U JPH03108889 U JP H03108889U JP 1612190 U JP1612190 U JP 1612190U JP 1612190 U JP1612190 U JP 1612190U JP H03108889 U JPH03108889 U JP H03108889U
- Authority
- JP
- Japan
- Prior art keywords
- piston
- port
- inlet port
- outlet port
- spool
- 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
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の実施例を示すニユートラルコ
ントロール弁の断面図、第２図は可変容量ポンプ
の容量制御装置の説明図、第３図は従来のニユー
トラルコントロール弁の断面図である。
２０は弁本体、２４はスリーブ、２６はピスト
ン、２７は第１受圧部、２８は第２受圧部、２９
は入口ポート、３０は出口ポート、３１はスプー
ル、３３は第３受圧部、３４はバネ、３５は第１
ランド部、３７は第２ランド部、３８は背圧室。
FIG. 1 is a sectional view of a neutral control valve showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of a displacement control device for a variable displacement pump, and FIG. 3 is a sectional view of a conventional neutral control valve. 20 is a valve body, 24 is a sleeve, 26 is a piston, 27 is a first pressure receiving part, 28 is a second pressure receiving part, 29
30 is an inlet port, 30 is an outlet port, 31 is a spool, 33 is a third pressure receiving part, 34 is a spring, 35 is a first
A land portion, 37 is a second land portion, and 38 is a back pressure chamber.
Claims (1)
挿されて当該ピストン２６を軸方向に押す第１受
圧部２７と第２受圧部２８を有するスリーブ２４
を設け、前記弁本体２０の軸方向中間に、入口ポ
ート２９と出口ポート３０を連通・遮断するスプ
ール３１を設け、前記弁本体２０の軸方向他端に
、前記スプール３１を入口ポート２９と出口ポー
ト３０を連通する方向に押すバネ３４が設けられ
、かつ第３受圧部３３を構成する軸孔２３を形成
し、 前記スプール３１を、前記入口ポート２９と軸
孔２３を遮断する第１ランド部３５と入口ポート
２９と出口ポート３０を連通・遮断する第２ラン
ド部３７を有し、その他端部３１ｂを前記ピスト
ン２６当接して前記出口ポート３０をピストン２
６の背圧室３８を通してタンクに連通できる構造
としたことを特徴とする減圧弁式制御信号圧発生
弁。[Claims for Utility Model Registration] A sleeve 24 having a first pressure receiving part 27 and a second pressure receiving part 28 into which a piston 26 is fitted into one axial end of the valve body 20 and pushes the piston 26 in the axial direction.
A spool 31 for communicating and blocking the inlet port 29 and the outlet port 30 is provided in the axial middle of the valve body 20, and the spool 31 is provided at the other end of the valve body 20 in the axial direction to connect the inlet port 29 and the outlet port. A first land portion is provided with a spring 34 that pushes the port 30 in the direction of communication, and forms the shaft hole 23 constituting the third pressure receiving portion 33, and isolates the spool 31 from the inlet port 29 and the shaft hole 23. 35, the inlet port 29, and the outlet port 30, and the other end 31b is in contact with the piston 26 to connect the outlet port 30 to the piston 2.
A pressure reducing valve type control signal pressure generating valve characterized in that it has a structure that allows communication with a tank through a back pressure chamber 38 of No. 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1612190U JPH03108889U (en) | 1990-02-22 | 1990-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1612190U JPH03108889U (en) | 1990-02-22 | 1990-02-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03108889U true JPH03108889U (en) | 1991-11-08 |
Family
ID=31519406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1612190U Pending JPH03108889U (en) | 1990-02-22 | 1990-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03108889U (en) |
-
1990
- 1990-02-22 JP JP1612190U patent/JPH03108889U/ja active Pending