JPH0319476U - - Google Patents
Info
- Publication number
- JPH0319476U JPH0319476U JP7869389U JP7869389U JPH0319476U JP H0319476 U JPH0319476 U JP H0319476U JP 7869389 U JP7869389 U JP 7869389U JP 7869389 U JP7869389 U JP 7869389U JP H0319476 U JPH0319476 U JP H0319476U
- Authority
- JP
- Japan
- Prior art keywords
- control valve
- discharge
- pilot
- pump
- valve device
- 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 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図はこの考案の実施例を一部裁断して示し
た側面図、第２図は上記実施例の油圧回路図、第
３図は別の実施例の油圧回路図、第４図は従来例
を示す側面図である。
１……ポンプ本体ハウジング、２……端部カバ
ー、３……補助ポンプ、４……補助ポンプ要素、
５……圧力制御弁、８……圧抜弁、１１……メイ
ンポンプ要素、１２……吐出量可変要素、１４…
…操作ピストン、１５……比例電磁制御弁。
Fig. 1 is a partially cutaway side view of an embodiment of this invention, Fig. 2 is a hydraulic circuit diagram of the above embodiment, Fig. 3 is a hydraulic circuit diagram of another embodiment, and Fig. 4 is a conventional one. It is a side view which shows an example. DESCRIPTION OF SYMBOLS 1... Pump main body housing, 2... End cover, 3... Auxiliary pump, 4... Auxiliary pump element,
5...Pressure control valve, 8...Pressure relief valve, 11...Main pump element, 12...Discharge rate variable element, 14...
...Operating piston, 15...Proportional solenoid control valve.
Claims (1)
ストンの圧内室内のパイロツト圧油圧力を単一の
比例電磁制御弁を用いて吐出圧および吐出流量の
測定電気量に基づく閉ループフイードバツク制御
方式で制御することにより操作ピストンを変位さ
せて吐出量可変要素の位置制御をする可変容量型
ポンプであつて、 端部カバーで蓋をされたハウジング内で前記吐
出量可変要素による吐出量制御を受けるメインポ
ンプ要素と、 前記端部カバーに組付けられた前記比例電磁制
御弁を含むパイロツト制御弁装置と、 メインポンプのロータ回転軸に直結されて前記
端部カバー内に内蔵され、その吐出し圧油を前記
パイロツト圧油として前記パイロツト制御弁装置
へ供給する補助ポンプ要素とを備え、 前記補助ポンプ要素のサクシヨンラインを前記
端部カバーに設けられているメインポンプ用サク
シヨンポートにカバー内で連通させると共に、補
助ポンプ要素の吐出ラインを同じく前記端部カバ
ー内に穿たれた通路を介して前記パイロツト制御
弁装置に接続してなることを特徴とする可変容量
型ポンプ。[Claims for Utility Model Registration] Measurement of the discharge pressure and discharge flow rate using a single proportional electromagnetic control valve to measure the pilot pressure hydraulic pressure in the pressure chamber of the operating piston for applying operating force to the discharge rate variable element. A variable displacement pump that controls the position of a discharge amount variable element by displacing an operating piston by controlling with a closed loop feedback control method based on a main pump element subject to discharge rate control by a variable element; a pilot control valve device including the proportional electromagnetic control valve assembled to the end cover; an auxiliary pump element that is built in the main pump and supplies its discharge pressure oil as the pilot pressure oil to the pilot control valve device, and a suction line of the auxiliary pump element is connected to the main pump provided in the end cover. The variable capacity variable displacement pump is characterized in that the suction port for the auxiliary pump element communicates with the pilot control valve device within the cover, and the discharge line of the auxiliary pump element is also connected to the pilot control valve device via a passage bored in the end cover. type pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7869389U JPH0319476U (en) | 1989-07-05 | 1989-07-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7869389U JPH0319476U (en) | 1989-07-05 | 1989-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0319476U true JPH0319476U (en) | 1991-02-26 |
Family
ID=31622185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7869389U Pending JPH0319476U (en) | 1989-07-05 | 1989-07-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0319476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083738A (en) * | 2004-09-15 | 2006-03-30 | Yuken Kogyo Co Ltd | Variable displacement pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267376A (en) * | 1989-04-07 | 1990-11-01 | Nissei Plastics Ind Co | Fluid control device |
-
1989
- 1989-07-05 JP JP7869389U patent/JPH0319476U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267376A (en) * | 1989-04-07 | 1990-11-01 | Nissei Plastics Ind Co | Fluid control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006083738A (en) * | 2004-09-15 | 2006-03-30 | Yuken Kogyo Co Ltd | Variable displacement pump |
| JP4695859B2 (en) * | 2004-09-15 | 2011-06-08 | 油研工業株式会社 | Variable displacement pump |
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