JPH0283898U

JPH0283898U -

Info

Publication number: JPH0283898U
Application number: JP16417788U
Authority: JP
Priority date: 1988-12-19
Filing date: 1988-12-19
Publication date: 1990-06-28

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示す油圧ジヤツキの
駆動装置の油圧回路図、第２図は従来例を示す油
圧ジヤツキの駆動装置の油圧回路図である。１……空気圧源、２……方向切換弁、３……エ
アブースターポンプ、６……タンク、１０……圧
抜弁、１２……油圧ジヤツキ、１２Ａ……伸張側
油室、１２Ｂ……収縮側油室、１３……オイルリ
ザーバ、１４……カウンタバランス弁。 FIG. 1 is a hydraulic circuit diagram of a hydraulic jack drive device showing an embodiment of the present invention, and FIG. 2 is a hydraulic circuit diagram of a hydraulic jack drive device showing a conventional example. 1... Air pressure source, 2... Directional switching valve, 3... Air booster pump, 6... Tank, 10... Pressure relief valve, 12... Hydraulic jack, 12A... Extension side oil chamber, 12B... Contraction side Oil chamber, 13...Oil reservoir, 14...Counter balance valve.

補正平１．３．１７考案の名称を次のように補正する。考案の名称複動式油圧アクチユエータの駆
動装置実用新案登録請求の範囲を次のように補正する
。Amendment 1.3.17 Hei 1. The name of the invention is amended as follows. Title of the invention: Drive device for double-acting hydraulic actuator The scope of the utility model registration claim is amended as follows.

【実用新案登録請求の範囲】エア圧で駆動される油圧ポンプの吐出圧により
油圧アクチユエータを伸縮駆動する複動式油圧ア
クチユエータの駆動装置において、油圧アクチユ
エータの負荷側の油室に前記油圧ポンプを接続し
、この油室をタンクに接続する圧抜弁を備える一
方、油圧アクチユエータの反負荷側の油室をオイ
ルリザーバに接続し、油圧ポンプを駆動するエア
圧を油圧ポンプとこのオイルリザーバとに選択的
に接続する方向切換弁を備えたことを特徴とする
複動式油圧アクチユエータの駆動装置。[Scope of claim for utility model registration] Due to the discharge pressure of a hydraulic pump driven by air pressure
In a drive device for a double-acting hydraulic actuator that telescopically drives a hydraulic actuator , the hydraulic pump is connected to an oil chamber on the load side of the hydraulic actuator , and a pressure relief valve is provided to connect this oil chamber to a tank. A double-acting hydraulic actuator , characterized in that it is equipped with a directional control valve that connects an oil chamber on the load side to an oil reservoir and selectively connects air pressure for driving a hydraulic pump to the hydraulic pump and the oil reservoir. Drive device.

Claims

[Scope of utility model registration request]

In a double-acting hydraulic jack drive device in which a hydraulic jack is telescopically driven by oil discharged from a hydraulic pump driven by air pressure, the hydraulic pump is connected to an oil chamber on the extension side of the hydraulic jack, and this oil chamber is connected to a tank. The oil chamber on the contraction side of the hydraulic jack is connected to an oil reservoir via a counterbalance valve, and the air pressure that drives the hydraulic pump is selectively connected to the hydraulic pump and this oil reservoir. A double-acting hydraulic jack drive device characterized by being equipped with a directional switching valve.