PROBLEM TO BE SOLVED: To provide a pump device capable of suppressing the jerky action of a hydraulic actuator without adding machining work for providing a throttle, and the hydraulic actuator.SOLUTION: A pump device is integrally equipped with a pump for discharging oil; and switch valves (a first opening valve 51a and a second opening valve 52a) for switching a flowing direction of the oil supplied to a first chamber or a second chamber of a cylinder device whose inside is divided into the first chamber extending in an expansion stroke and the second chamber extending in a compression stroke by a piston. An opening part 22q which forms a channel connecting a second check valve chamber 22n and a second valve chamber 52f in the second opening valve 52a is formed as a narrower throttle than an opening part 22p which forms a channel communicating a first check valve chamber 22m and a first valve chamber 51f in the first opening valve 51a.

    【課題】絞りを設けるための加工作業を追加することなく、液圧アクチュエータのぎくしゃくした動きを抑制することができるポンプ装置及び液圧アクチュエータを提供する。【解決手段】オイルを吐出するポンプと、ピストンによって内部が、伸張行程で伸びる第1室と圧縮行程で伸びる第2室とに区画されたシリンダ装置の第1室又は第2室に供給するオイルの流れの向きを切り替える切替弁(第1開放弁51a及び第2開放弁52a)とを一体的に備えたポンプ装置の、第2開放弁52aにおける第2逆止弁室22nと第2弁室52fとを通じさせる流路を形成する開口部分22qが、第1開放弁51aにおける第1逆止弁室22mと第1弁室51fとを通じさせる流路を形成する開口部分22pよりも狭い絞りとして形成されている。【選択図】図10


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    Title :

    PUMP DEVICE AND HYDRAULIC ACTUATOR


    Additional title:

    ポンプ装置及び液圧アクチュエータ


    Contributors:

    Publication date :

    2015-10-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F04B Verdrängerkraft- und Verdrängerarbeitsmaschinen für Flüssigkeiten , POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL , Druckmittelbetriebene Systeme allgemein



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