JPH0387975U - - Google Patents

Info

Publication number
JPH0387975U
JPH0387975U JP14868089U JP14868089U JPH0387975U JP H0387975 U JPH0387975 U JP H0387975U JP 14868089 U JP14868089 U JP 14868089U JP 14868089 U JP14868089 U JP 14868089U JP H0387975 U JPH0387975 U JP H0387975U
Authority
JP
Japan
Prior art keywords
pressure
spring
discharge
pump
spring force
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.)
Granted
Application number
JP14868089U
Other languages
Japanese (ja)
Other versions
JPH0544545Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1989148680U priority Critical patent/JPH0544545Y2/ja
Publication of JPH0387975U publication Critical patent/JPH0387975U/ja
Application granted granted Critical
Publication of JPH0544545Y2 publication Critical patent/JPH0544545Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Reciprocating Pumps (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の実施例を示す構成図、第２
図は上記実施例の概要を示す回路図、第３図は上
記実施例の吐出圧力と吐出流量の特性図、第４図
は他の実施例を示す部分断面図、第５図は従来例
を示す回路図である。 １……可変容量形ポンプ、７……吐出量可変制
御要素（斜板）、９……ばね、１０……操作ピス
トン、１２……制御弁、１９……第２の制御弁、
２１，２１１……スプール、２２……ピストン、
２７……制御用調整ねじ。 Figure 1 is a configuration diagram showing an embodiment of this invention, Figure 2
The figure is a circuit diagram showing the outline of the above embodiment, Fig. 3 is a characteristic diagram of the discharge pressure and discharge flow rate of the above embodiment, Fig. 4 is a partial sectional view showing another embodiment, and Fig. 5 is a conventional example. FIG. DESCRIPTION OF SYMBOLS 1... Variable displacement pump, 7... Variable discharge amount control element (swash plate), 9... Spring, 10... Operation piston, 12... Control valve, 19... Second control valve,
21, 211...spool, 22...piston,
27...Control adjustment screw.

Claims (1)

【実用新案登録請求の範囲】 ばねにより傾転された吐出量可変制御要素の位
置を制御する操作ピストンの圧力室内に吐出圧油
の一部を導入して前記圧力室内の油圧を増圧し、
あるいはタンクへの導出により降圧させる制御弁
を有する可変容量形ポンプにおいて、 上記吐出量可変制御要素のばねのばね力と吐出
圧力とにより位置制御されるスプールを有し、ば
ね力と吐出圧力との釣り合いにより絞り制御され
た吐出圧油の一部を前記圧力室に送る第２の制御
弁と、 上記ばねの初期たわみ量を変化させるばね力調
節機構とを備えたことを特徴とする可変容量形ポ
ンプ。[Claims for Utility Model Registration] A portion of the discharge pressure oil is introduced into a pressure chamber of an operating piston that controls the position of a discharge amount variable control element tilted by a spring to increase the hydraulic pressure in the pressure chamber,
Alternatively, in a variable displacement pump having a control valve that lowers the pressure by leading it to the tank, the pump has a spool whose position is controlled by the spring force and discharge pressure of the spring of the discharge amount variable control element, and the spring force and discharge pressure are A variable displacement type characterized by comprising: a second control valve that sends a part of the discharge pressure oil that is throttle-controlled by balance to the pressure chamber; and a spring force adjustment mechanism that changes the initial deflection amount of the spring. pump.
JP1989148680U 1989-12-26 1989-12-26 Expired - Lifetime JPH0544545Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1989148680U JPH0544545Y2 (en) 1989-12-26 1989-12-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989148680U JPH0544545Y2 (en) 1989-12-26 1989-12-26

Publications (2)

Publication Number Publication Date
JPH0387975U true JPH0387975U (en) 1991-09-09
JPH0544545Y2 JPH0544545Y2 (en) 1993-11-11

Family

ID=31695123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1989148680U Expired - Lifetime JPH0544545Y2 (en) 1989-12-26 1989-12-26

Country Status (1)

Country Link
JP (1) JPH0544545Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002202063A (en) * 2000-12-28 2002-07-19 Kayaba Ind Co Ltd Swash plate type piston pump

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145104A (en) * 1977-05-23 1978-12-18 Daikin Ind Ltd Variable capacity type hydraulic device
JPS616314U (en) * 1984-06-18 1986-01-16 株式会社資生堂 advance container

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53145104A (en) * 1977-05-23 1978-12-18 Daikin Ind Ltd Variable capacity type hydraulic device
JPS616314U (en) * 1984-06-18 1986-01-16 株式会社資生堂 advance container

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002202063A (en) * 2000-12-28 2002-07-19 Kayaba Ind Co Ltd Swash plate type piston pump
JP4523720B2 (en) * 2000-12-28 2010-08-11 カヤバ工業株式会社 Swash plate type piston pump

Also Published As

Publication number Publication date
JPH0544545Y2 (en) 1993-11-11

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