JPH0462902U - - Google Patents
Info
- Publication number
- JPH0462902U JPH0462902U JP10402690U JP10402690U JPH0462902U JP H0462902 U JPH0462902 U JP H0462902U JP 10402690 U JP10402690 U JP 10402690U JP 10402690 U JP10402690 U JP 10402690U JP H0462902 U JPH0462902 U JP H0462902U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- hydraulic pump
- pressure oil
- servo
- engine
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す油圧回路図、第
２図は従来の油圧回路図である。
１は可変容量型油圧ポンプ、１ａは斜板、２は
操作弁、３は補助油圧ポンプ、４は制御弁、５は
サーボ弁、６はサーボピストン、１１はアンロー
ド弁。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention, and FIG. 2 is a conventional hydraulic circuit diagram. 1 is a variable displacement hydraulic pump, 1a is a swash plate, 2 is an operating valve, 3 is an auxiliary hydraulic pump, 4 is a control valve, 5 is a servo valve, 6 is a servo piston, and 11 is an unload valve.
Claims (1)
１の斜板１ａを作動するサーボピストン６と、こ
のサーボピストン６に圧油を供給するサーボ弁５
と、前記エンジンＭで駆動される補助油圧ポンプ
３の吐出圧油を、操作弁２以降のドレーン路７に
設けた絞り８前後の差圧でサーボ弁５の切換用受
圧部５ａに供給制御する制御弁４を備え、 前記補助油圧ポンプ３の吐出圧油をアンロード
する弁を設けたことを特徴とする可変容量型油圧
ポンプの容量制御装置。[Claims for Utility Model Registration] A servo piston 6 that operates the swash plate 1a of a variable displacement hydraulic pump 1 driven by an engine M, and a servo valve 5 that supplies pressure oil to the servo piston 6.
Then, the pressure oil discharged from the auxiliary hydraulic pump 3 driven by the engine M is controlled to be supplied to the switching pressure receiving part 5a of the servo valve 5 by the differential pressure before and after the throttle 8 provided in the drain path 7 after the operating valve 2. A capacity control device for a variable displacement hydraulic pump, comprising a control valve 4, and a valve for unloading pressure oil discharged from the auxiliary hydraulic pump 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10402690U JPH0462902U (en) | 1990-10-04 | 1990-10-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10402690U JPH0462902U (en) | 1990-10-04 | 1990-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0462902U true JPH0462902U (en) | 1992-05-28 |
Family
ID=31849136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10402690U Pending JPH0462902U (en) | 1990-10-04 | 1990-10-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0462902U (en) |
-
1990
- 1990-10-04 JP JP10402690U patent/JPH0462902U/ja active Pending
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