JPH03111494U - - Google Patents
Info
- Publication number
- JPH03111494U JPH03111494U JP2077090U JP2077090U JPH03111494U JP H03111494 U JPH03111494 U JP H03111494U JP 2077090 U JP2077090 U JP 2077090U JP 2077090 U JP2077090 U JP 2077090U JP H03111494 U JPH03111494 U JP H03111494U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- supply path
- oil supply
- compression spring
- pressure
- 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
Links
Landscapes
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Control Of Cutting Processes (AREA)
- Press Drives And Press Lines (AREA)
Description
第１図乃至第７図はこの考案の一実施例を示し
、第１図は油圧作動機の油圧回路図、第２図は油
圧作動機の一部切欠正面図、第３図は同じく要部
縦断面図、第４図は第３図のＡ−Ａ線断面図、第
５図は第４図の第１ケーシング部のＢ−Ｂ線断面
図、第６図は第５図のＣ−Ｃ線断面図、第７図は
第４図の第１ケーシング部のＤ−Ｄ線断面図、第
８図は従来の油圧作動機の一例を示す油圧回路図
である。
１……油圧作動機、２……油槽、２Ａ……第１
油槽、２Ｂ……第２油槽、３……油圧ポンプ、４
……単動シリンダ、５……加圧室、６……圧油供
給路、７……逃がし弁、８……逆止弁、９……排
油路、１０……開閉弁、１２……ケーシング、１
３……電動機、１６……ピストン、１７……ピス
トンロツド、１８……戻しばね、２０……クラン
プ工具、５４……ニードルバルブ、５５……圧縮
ばね、５６……弁座、５７……レバー。
Figures 1 to 7 show an embodiment of this invention, with Figure 1 being a hydraulic circuit diagram of the hydraulic actuator, Figure 2 being a partially cutaway front view of the hydraulic actuator, and Figure 3 showing the main parts of the same. 4 is a sectional view taken along the line A-A in FIG. 3, FIG. 5 is a sectional view taken along the line B-B of the first casing part in FIG. 4, and FIG. 6 is a sectional view taken along the line C-C in FIG. 5. 7 is a sectional view taken along line DD of the first casing portion in FIG. 4, and FIG. 8 is a hydraulic circuit diagram showing an example of a conventional hydraulic actuator. 1...Hydraulic actuator, 2...Oil tank, 2A...1st
Oil tank, 2B...Second oil tank, 3...Hydraulic pump, 4
... Single-acting cylinder, 5 ... Pressure chamber, 6 ... Pressure oil supply path, 7 ... Relief valve, 8 ... Check valve, 9 ... Oil drain path, 10 ... Opening/closing valve, 12 ... casing, 1
3...Electric motor, 16...Piston, 17...Piston rod, 18...Return spring, 20...Clamp tool, 54...Needle valve, 55...Compression spring, 56...Valve seat, 57...Lever.
Claims (1)
油圧ポンプをそなえたケーシングと、このケーシ
ングに連結され工具駆動用のピストンを収容した
単動シリンダと、前記ピストンの戻り動作用の戻
しばねとをそなえ、前記ポンプの吐出側と前記単
動シリンダの加圧室とを接続する圧油供給路に逃
がし弁を接続し、この逃がし弁の接続位置よりも
前記加圧室寄りの前記圧油供給路に戻り油阻止用
の逆止弁を設け、この逆止弁と前記加圧室との間
の前記圧油供給路もしくは前記加圧室に接続され
前記油槽に至る排油路に、手動操作式の開閉弁を
設けたことを特徴とする油圧作動機。 ２ 手動操作式の開閉弁が、軸方向に移動自在な
ニードルバルブと、このニードルバルブを弁座に
圧接する方向に付勢する圧縮ばねと、前記ニード
ルバルブを前記圧縮ばねの付勢力と反対方向に駆
動する手動操作用のレバーとにより構成されてい
る、請求項１記載の油圧作動機。[Claims for Utility Model Registration] 1. A casing including an oil tank and an electric hydraulic pump whose suction side is connected to the oil tank, a single-acting cylinder connected to the casing and housing a piston for driving a tool, and the piston. A relief valve is provided with a return spring for the return operation of the pump, and a relief valve is connected to a pressure oil supply path connecting the discharge side of the pump and the pressurizing chamber of the single-acting cylinder, and A check valve for returning oil to the pressure oil supply path near the pressure chamber is provided, and the pressure oil supply path is connected to the pressure oil supply path between the check valve and the pressurization chamber or to the pressure chamber and is connected to the oil tank. A hydraulically operated machine characterized by having a manually operated on-off valve installed in the oil drain path. 2. A manually operated on-off valve includes a needle valve that is freely movable in the axial direction, a compression spring that biases the needle valve in a direction that presses the needle valve against the valve seat, and a compression spring that biases the needle valve in a direction opposite to the biasing force of the compression spring. 2. The hydraulic actuator according to claim 1, further comprising a lever for manual operation that is driven by the hydraulic actuator.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2077090U JPH084231Y2 (en) | 1990-02-28 | 1990-02-28 | Hydraulic actuator |
| US07/569,004 US5125324A (en) | 1988-02-10 | 1990-08-17 | Portable hydraulically operated device incorporating automatic drain valve |
| US07/868,329 US5209153A (en) | 1990-02-28 | 1992-04-14 | Portable hydraulically operated device incorporating automatic drain valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2077090U JPH084231Y2 (en) | 1990-02-28 | 1990-02-28 | Hydraulic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03111494U true JPH03111494U (en) | 1991-11-14 |
| JPH084231Y2 JPH084231Y2 (en) | 1996-02-07 |
Family
ID=31523856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2077090U Expired - Lifetime JPH084231Y2 (en) | 1988-02-10 | 1990-02-28 | Hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084231Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015140769A (en) * | 2014-01-30 | 2015-08-03 | 三井造船株式会社 | Fuel gas supply device |
-
1990
- 1990-02-28 JP JP2077090U patent/JPH084231Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015140769A (en) * | 2014-01-30 | 2015-08-03 | 三井造船株式会社 | Fuel gas supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084231Y2 (en) | 1996-02-07 |
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