JPH0644499Y2 - Hydraulic actuator - Google Patents

Hydraulic actuator

Info

Publication number
JPH0644499Y2
JPH0644499Y2 JP1988016481U JP1648188U JPH0644499Y2 JP H0644499 Y2 JPH0644499 Y2 JP H0644499Y2 JP 1988016481 U JP1988016481 U JP 1988016481U JP 1648188 U JP1648188 U JP 1648188U JP H0644499 Y2 JPH0644499 Y2 JP H0644499Y2
Authority
JP
Japan
Prior art keywords
valve body
oil
main valve
chamber
main
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.)
Expired - Lifetime
Application number
JP1988016481U
Other languages
Japanese (ja)
Other versions
JPH01127637U (en
Inventor
正治 荒木
紀之 熊崎
Original Assignee
株式会社ダイア
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 by 株式会社ダイア filed Critical 株式会社ダイア
Priority to JP1988016481U priority Critical patent/JPH0644499Y2/en
Publication of JPH01127637U publication Critical patent/JPH01127637U/ja
Priority to US07/569,004 priority patent/US5125324A/en
Application granted granted Critical
Publication of JPH0644499Y2 publication Critical patent/JPH0644499Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Forging (AREA)
  • Control Of Presses (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、たとえば金属材料のかしめなどの塑性加工
や穴あけ、切断作業等に用いられる油圧作動機に関す
る。
[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a hydraulic actuator used for plastic working such as caulking of metal materials, drilling, and cutting work.

〔従来の技術〕[Conventional technology]

この種の油圧作動機としては、配管工事や建築工事等の
現場において作業者が手で保持しあるいは作業台上に固
定して用いる小形のものが多く用いられており、加工用
の工具を単動式の油圧シリンダにより駆動する形式のも
のが一般的である。そしてこの単動シリンダは油圧ポン
プに接続され、このポンプからの圧油を油圧シリンダの
加圧室に送入することによりピストンロツドが突出して
工具により各種加工作業がおこなわれ、加工後のピスト
ンの戻り運動は戻しばねによりおこなわれるようになつ
ている。
As this type of hydraulic actuator, many small-sized hydraulic actuators are used that are manually held by workers or fixed on a workbench at the site of piping work, construction work, etc. Generally, a type driven by a dynamic hydraulic cylinder is used. This single-acting cylinder is connected to a hydraulic pump, and when the pressure oil from this pump is fed into the pressurizing chamber of the hydraulic cylinder, the piston rod projects and various machining operations are performed with tools, and the piston returns after machining. The movement is performed by a return spring.

〔考案が解決しようとする問題点〕[Problems to be solved by the invention]

ところで前記ピストンの戻り運動をさせるには、油圧ポ
ンプの運転を停止させ、さらに油圧ポンプから単動シリ
ンダに至る圧油供給管路を開いて油槽へ油を戻してやる
必要がある。従来はこのために圧油供給管路に接続した
手動操作式の弁を用い、この弁を開いて油槽へ油を戻
し、ピストンの戻り終了後はこの弁を閉じて次の圧油供
給に備えるという作業をおこなつていたので、加工作業
中の手を離して弁を操作するため危険であるうえ、手間
がかかり作業能率が劣るものであつた。また前記の手動
式の弁を用いるかわりに、実公昭53−47269号公報によ
れば、ピストンに設けたリターンバルブによりピストン
に穿設したオイル通路孔を開閉するようにした油圧作動
機が提案されているが、この油圧作動機の場合はピスト
ンがストローク端に達しない限りは戻し動作をおこなう
ことができず、加工作業開始後に加工位置不適切あるい
は障害物の発見などのなんらかの事情によりピストンを
戻したい場合でも、ピストンが戻らないため不都合であ
り、安全上も好ましくないという問題がある。
By the way, in order to return the piston, it is necessary to stop the operation of the hydraulic pump, open the pressure oil supply pipe line from the hydraulic pump to the single acting cylinder, and return the oil to the oil tank. Conventionally, for this purpose, a manually operated valve connected to the pressure oil supply line was used, this valve was opened to return the oil to the oil tank, and after the piston returned, this valve was closed to prepare for the next pressure oil supply. However, it was dangerous to operate the valve by releasing the hand during the machining work, and it was troublesome and the work efficiency was poor. Further, instead of using the above manual valve, JP-B-53-47269 proposes a hydraulic actuator in which a return valve provided in the piston opens and closes an oil passage hole formed in the piston. However, in the case of this hydraulic actuator, the return operation cannot be performed unless the piston reaches the stroke end, and after some processing such as improper processing position or the detection of obstacles, the piston is returned. Even if it is desired, the piston does not return, which is inconvenient, and there is a problem in that it is not preferable in terms of safety.

この考案は上記従来の問題点を解決するもので、油圧ポ
ンプの運転を停止させるだけで自動的に単動シリンダの
加圧室からの排油をおこなうことができ、ピストンの戻
し運動のための手間がかからず、安全で作業能率がすぐ
れた油圧作動機を提供しようとするものである。
This invention solves the above-mentioned conventional problems, and the oil can be automatically discharged from the pressurizing chamber of the single-acting cylinder simply by stopping the operation of the hydraulic pump, and the piston for the return movement of the piston can be performed. The present invention aims to provide a hydraulic actuator that is labor-saving, safe, and has excellent work efficiency.

〔問題点を解決するための手段〕[Means for solving problems]

しかしてこの考案の油圧作動機は、工具駆動用のピスト
ンロツドに固着したピストンを収容し該ピストンの戻り
動作用の戻しばねをそなえた単動シリンダと、この単動
シリンダの加圧室に吐出側を接続され油槽に吸込側を接
続された油圧ポンプとをそなえた油圧作動機において、
前記油圧ポンプに接続された圧油供給路が一端部に開口
するバルブ室内に、前記一端部側が開口する筒状の主弁
体を摺動自在に嵌装し、この主弁体の内径部に嵌膜自在
である突軸を前記バルブ室の前記一端部に突設し、前記
バルブ室の他端部には排油流路を介して前記油槽に連通
する弁座を設け、前記主弁体の前記突軸側への移動時に
該主弁体に係合する係合片部をそなえ前記弁座に接離自
在である副弁体を前記主弁体に摺動自在に取付け、前記
主弁体と前記バルブ室壁面との間に装架され該主弁体を
前記突軸側に付勢する主ばねと、前記主弁体または前記
突軸と前記副弁体との間に装架され該副弁体を前記弁座
側に付勢する副ばねとを具備するとともに、前記バルブ
室の前記弁座寄りの位置に開口する給排油路を、前記単
動シリンダの加圧室に接続し、前記主弁体には該主弁体
の内径部と前記給排油路とを連通する通油孔を設けたこ
とを特徴とするものである。
The hydraulic actuator of the present invention, however, has a single-acting cylinder that houses a piston fixed to a piston rod for driving a tool and has a return spring for returning the piston, and a discharge chamber in the pressurizing chamber of the single-acting cylinder. In a hydraulic actuator having a hydraulic pump connected to the oil tank and connected to the suction side,
A cylindrical main valve body having the one end side opening is slidably fitted in a valve chamber having a pressure oil supply passage connected to the hydraulic pump opening at one end. A projecting shaft, which is capable of freely fitting a film, is projectingly provided at the one end portion of the valve chamber, and a valve seat communicating with the oil tank through an oil drain passage is provided at the other end portion of the valve chamber, and the main valve body is provided. Of the main valve body, the sub-valve body having an engaging piece portion that engages with the main valve body when the Mounted between the body and the wall surface of the valve chamber to urge the main valve body toward the protruding shaft side, and mounted between the main valve body or the protruding shaft and the sub valve body. A sub-spring for urging the sub-valve toward the valve seat side, and pressurizing the single-acting cylinder with an oil supply / drain passage opening to a position near the valve seat in the valve chamber. Connected to the the main valve body in which characterized in that a oil passing hole communicating with the supply and discharge oil passage and the inside diameter portion of the main valve body.

〔作用〕[Action]

この考案の油圧作動機においては、油圧ポンプを運転す
ると圧油供給路からバルブ室内に供給された圧油が主弁
体を弁座側に移動させ、副弁体はこの主弁体と共に移動
して弁座に着座してバルブ室と排油流路間を遮断する。
主弁体の移動により主弁体の内径部の開口端と突軸との
間にすきまが形成され、圧油供給路からの圧油はこのす
きまおよび主弁体の通油孔を経て給排油路に流入し、単
動シリンダの加圧室内に供給されてピストンロツドを駆
動し、このピストンロツドが工具を作動させてかしめ、
穴あけ、切断などの被加工物の加工がおこなわれる。加
工後油圧ポンプの運転を停止すれば、主弁体および副弁
体は主ばねにより突軸側に駆動され、副弁体の弁座から
の離間により、給排油路が排油流路に連通するので、単
動シリンダの加圧室内の油は排油流路を経て油槽に戻
り、ピストンおよびピストンロツドはばねにより戻り位
置に復帰する。また、圧油によるピストンロツドの駆動
を開始後、作業途中においてピストンロツドを戻したい
ときは、任意の時点で油圧ポンプを停止すれば、前記と
同じ動作で戻り位置に復帰する。
In the hydraulic actuator of this invention, when the hydraulic pump is operated, the pressure oil supplied from the pressure oil supply passage into the valve chamber moves the main valve body toward the valve seat side, and the sub valve body moves together with this main valve body. Sits on the valve seat to shut off between the valve chamber and the oil drain passage.
Due to the movement of the main valve body, a clearance is formed between the opening end of the inner diameter part of the main valve body and the protruding shaft, and the pressure oil from the pressure oil supply passage is supplied and discharged through this clearance and the oil passage hole of the main valve body. It flows into the oil passage, is supplied into the pressurizing chamber of the single-acting cylinder, drives the piston rod, and this piston rod operates the tool and caulks,
Processing of the work such as drilling and cutting is performed. If the operation of the hydraulic pump is stopped after processing, the main valve element and the sub valve element are driven toward the salient shaft side by the main spring, and the auxiliary valve element is separated from the valve seat, and the oil supply / exhaust passage becomes the oil discharge passage. Since they communicate with each other, the oil in the pressurizing chamber of the single-acting cylinder returns to the oil tank through the oil discharge passage, and the piston and the piston rod return to the returning position by the spring. Further, if it is desired to return the piston rod during the work after the piston rod is driven by the pressure oil, if the hydraulic pump is stopped at an arbitrary point, it returns to the return position by the same operation as described above.

〔実施例〕〔Example〕

以下第1図乃至第6図によりこの考案の一実施例を説明
する 第1図は油圧作動機1の全体の構成を示し、2はポンプ
およびバルブ類を収容したハウジング、3はハウジング
2に連結されたポンプ駆動用の電動機で、取手4に設け
たスイツチ5の手動操作によりON,OFF制御されるもので
ある。6はハウジング2に連結された単動式の油圧シリ
ンダである単動シリンダ、7はこのシリンダのシリンダ
本体61の先端部に取付けたブラケツト、8はこのブラケ
ツトに抜差可能なフリーピン9により連結したホルダで
ある。また10はこのホルダ8にピン11により回動自在に
支持した工具であるクランプジヨーで、一対のジヨー10
a,10bから成り、各ジヨーは先端部に締付部12をそなえ
ている。ジヨー10a,10bは板ばね13により締付部12が閉
じる方向に付勢されており、締付部12には閉じた形で六
角形となるかしめ部12aと、円環状となるかしめ部12b
(第6図参照)が設けてある。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG. 1 shows the overall construction of a hydraulic actuator 1, 2 is a housing for accommodating pumps and valves, and 3 is a housing 2 connected to the housing 2. The electric motor for driving the pump is ON / OFF controlled by manually operating the switch 5 provided on the handle 4. 6 is a single-acting hydraulic cylinder which is a single-acting hydraulic cylinder connected to the housing 2, 7 is a bracket attached to the tip of the cylinder body 61 of this cylinder, and 8 is a free pin 9 which can be inserted into and removed from the bracket. It is a holder. Further, 10 is a clamp jaw which is a tool rotatably supported on the holder 8 by a pin 11, and is a pair of jaws.
Each of the joyos has a fastening portion 12 at its tip. The jaws 10a and 10b are urged by a leaf spring 13 in a direction in which the tightening portion 12 is closed, and the tightening portion 12 has a closed hexagonal crimping portion 12a and an annular crimping portion 12b.
(See FIG. 6) are provided.

また第2図乃至第5図は油圧機器部の内部構造を示し、
ハウジング2の一部を構成するギヤケース2a中には、電
動機3の回転軸により歯車21を介して駆動される駆動軸
22が回転自在に支持されている。ハウジング2の他部を
構成するポンプボデイ2b中には、プランジヤ23が摺動自
在に嵌装され、駆動軸22に固定した偏心カム24の外周に
嵌着したニードルベアリング25の外周には、圧縮ばね26
により付勢されたプランジヤ23の頭部が圧接されてい
る。27は逆止弁で、ポンプボデイ2bに締付けたキヤツプ
28との間に装架した圧縮ばね29により、プランジヤ23の
嵌装穴30の縁部に向つて加圧されている。32は上記構成
より成るプランジヤポンプ形式の油圧ポンプ31の吐出油
が流れる圧油供給路であり、バルブ室41に連通してい
る。33および34はそれぞれギヤケース2aおよびポンプボ
デイ2bに設けた油槽で、互いに連通しており、35は油槽
33とプランジヤ23の嵌装穴30の下部とを連通するスリツ
ト状の吸込口である。また第4図に示すように、バルブ
室41はポンプボデイ2bに穿設した丸孔をプラグ42で閉鎖
して成り、圧油供給路32はバルブ室41の一端部(プラグ
42側部)41aに開口している。43は有底円筒状の主弁体
で、そのつば部43aがバルブ室41の内壁面に嵌合し、該
内壁面に沿って長手方向に摺動自在であり、バルブ室41
の他端部41bの壁面との間に装架した主ばね44によりプ
ラグ42に向う方向(バルブ室41の一端部41a側)に付勢
されている。45はプラグ42に突設された突軸で、端部が
テーパ状を呈し、主弁体43の内径部43bの開口端に嵌脱
されるようになつている。また46はバルブ室41の他端部
41bに設けた弁座で、排油流路47を介して油槽33に連通
しており、ニードルバルブ形の副弁体48が、この弁座46
に接離されるように、主弁体43の先端部に摺動自在に保
持されている。48aはつば状の係合片部で、主弁体43の
先端部内面に係脱するものであり、またこの係合片部48
aと突軸45との間には小径の副ばね49が装架されて、副
弁体48を弁座46に向う方向に付勢している。50は給排油
路で、一端部がバルブ室41の側壁部の弁座46寄りの位
置、詳しくは主弁体43のつば部43aの移動範囲より弁座4
6寄りの位置に開口し、他端部は単動シリンダ6のシリ
ンダ本体61の加圧室61aに接続されている。51は主弁体4
3の筒壁部に穿設した通油孔で、主弁体43の内部と外部
を連通するものである。第5図に示す逃がし弁52は、給
排油路50から分岐した分岐管路53部分に設けられてい
る。また54はシリンダ本体61の低圧室61bに接続された
排油路で、油槽33に連通しているが、この排油路54の途
中に設けた中間室55(第5図参照)には、ピストン63の
移動その他に伴う密封油量の変動を吸収するためのゴム
袋56が装着されている。また第1図に示すように単動シ
リンダ6内において、ピストンロツド62と一体のピスト
ン63は、引張ばねから成る戻しばね64によつて該ピスト
ンロツド62が引込む戻り側に付勢されている。ピストン
ロツド62の先端に固着したローラブラケツト65には、2
個のローラ66が軸支され、ピストンロツド62の突出時に
このローラ66がクランプジヨー10の内側端面10cに係合
して各ジヨー10a,10bを矢印X方向に駆動するようにな
つている。
2 to 5 show the internal structure of the hydraulic equipment section,
In the gear case 2a forming a part of the housing 2, a drive shaft driven by the rotating shaft of the electric motor 3 via the gear 21.
22 is rotatably supported. A plunger 23 is slidably fitted in the pump body 2b constituting the other part of the housing 2, and a compression spring is attached to the outer circumference of a needle bearing 25 fitted to the outer circumference of an eccentric cam 24 fixed to the drive shaft 22. 26
The head of the plunger 23 urged by is pressed. 27 is a check valve, which is a cap fastened to the pump body 2b.
By a compression spring 29 mounted between the plunger 28 and 28, pressure is applied toward the edge of the fitting hole 30 of the plunger 23. Reference numeral 32 is a pressure oil supply passage through which the discharge oil of the hydraulic pump 31 of the plunger pump type having the above-mentioned configuration flows, and communicates with the valve chamber 41. 33 and 34 are oil tanks provided in the gear case 2a and the pump body 2b, respectively, which are in communication with each other, and 35 is an oil tank.
It is a slit-shaped suction port that connects 33 with the lower part of the fitting hole 30 of the plunger 23. Further, as shown in FIG. 4, the valve chamber 41 is formed by closing a round hole formed in the pump body 2b with a plug 42, and the pressure oil supply passage 32 is provided at one end of the valve chamber 41 (plug
42 side portion) 41a. Reference numeral 43 denotes a bottomed cylindrical main valve body, the flange portion 43a of which is fitted to the inner wall surface of the valve chamber 41 and is slidable in the longitudinal direction along the inner wall surface.
Is urged in the direction toward the plug 42 (on the one end 41a side of the valve chamber 41) by the main spring 44 mounted between the other end 41b and the wall surface of the other end 41b. Reference numeral 45 denotes a protruding shaft projectingly provided on the plug 42, the end portion of which has a tapered shape, and is adapted to be fitted into and removed from the open end of the inner diameter portion 43b of the main valve body 43. 46 is the other end of the valve chamber 41
The valve seat provided in 41b communicates with the oil tank 33 through the oil discharge passage 47, and the needle valve type auxiliary valve body 48 is
The main valve body 43 is slidably held at the tip of the main valve body 43 so as to be brought into contact with and separated from. Reference numeral 48a is a brim-shaped engaging piece portion which is engaged with and disengaged from the inner surface of the front end portion of the main valve body 43.
A small-diameter auxiliary spring 49 is mounted between a and the protruding shaft 45, and urges the auxiliary valve body 48 in the direction toward the valve seat 46. 50 is an oil supply / drainage passage, one end of which is closer to the valve seat 46 on the side wall of the valve chamber 41, more specifically, the valve seat 4 from the moving range of the flange 43a of the main valve body 43.
It is opened at a position near 6 and the other end is connected to the pressurizing chamber 61 a of the cylinder body 61 of the single-acting cylinder 6. 51 is the main valve body 4
An oil passage hole formed in the cylindrical wall portion of 3 connects the inside and outside of the main valve body 43. The relief valve 52 shown in FIG. 5 is provided in a branch pipeline 53 portion branched from the oil supply / discharge passage 50. Further, 54 is an oil discharge passage connected to the low pressure chamber 61b of the cylinder body 61 and communicates with the oil tank 33. In the intermediate chamber 55 (see FIG. 5) provided in the middle of this oil discharge passage 54, A rubber bag 56 is attached to absorb fluctuations in the amount of sealing oil due to movement of the piston 63 and other factors. Further, as shown in FIG. 1, in the single-acting cylinder 6, the piston 63 integral with the piston rod 62 is urged by the return spring 64, which is a tension spring, toward the return side where the piston rod 62 is retracted. The roller bracket 65 fixed to the tip of the piston rod 62 has two
Each roller 66 is pivotally supported, and when the piston rod 62 is projected, this roller 66 engages with the inner end surface 10c of the clamp jaw 10 and drives each jaw 10a, 10b in the arrow X direction.

上記構成の油圧作動機1を用いて、かしめ接続式の配管
の継手部の加工をおこなうには、第6図に示すように配
管70とOリング71を装着した継手72とを嵌合させて、手
動操作により開いたクランプジヨー10の締付部12内に挿
入し、継手72のつば部72aが締付部12の円環状のかしめ
部12bに嵌合するようにセツトする。次にスイツチ5を
手動押圧すれば、電動機3が回転して偏心カム24により
駆動されたプランジヤ23の往復動により、油圧ポンプ31
は圧油を圧油供給路32からバルブ室41内に圧送する。こ
の圧油により、プラグ42に押付けられていた主弁体43
は、弁座46側に移動し、この主弁体43と一体となつて移
動した副弁体48が弁座46に着座して閉止する。主弁体43
はさらに弁座46側に移動し、その内径部43bの開口端と
突軸45との間にすきま73が形成されると、圧油はこのす
きま73、通油孔51を経て給排油路50から単動シリンダ6
の加圧室61a内に供給され、ピストンロツド62は突出方
向に駆動される。このピストンロツド62の突出により、
ローラ66がクランプジヨー10を押圧して矢印X方向に回
動させるので、締付部12により継手72および配管70は六
角および楕円状に縮径され、かしめ接続される。クラン
プジヨー10が閉じたのち、スイツチ5の押圧を解除すれ
ば電動機3が停止し、油圧ポンプ31からの圧油供給が停
止するので、主弁体43は主ばね44によりプラグ42側に戻
され、これに伴つて係合片部48aを介して副弁体48も同
方向に戻されるので、弁座46は開放状態となる。これに
よつて給排油路50は排油流路47に連通するので、シリン
ダ本体61内の加圧室61a側の油は給排油路50から油槽33
へ排油できる状態となり、ピストンロツド62は戻しばね
64により引込方向に駆動されて第1図示の戻り位置に復
帰し、ローラ66の引込によりクランプジヨー10を開いて
継手接続品を取出すことができる。
In order to process the joint portion of the caulking connection type pipe using the hydraulic actuator 1 having the above-described configuration, the pipe 70 and the joint 72 having the O-ring 71 are fitted to each other as shown in FIG. Then, it is inserted into the tightening portion 12 of the clamp jaw 10 opened by manual operation, and is set so that the flange portion 72a of the joint 72 fits into the annular caulking portion 12b of the tightening portion 12. Next, when the switch 5 is manually pressed, the electric motor 3 is rotated and the reciprocating motion of the plunger 23 driven by the eccentric cam 24 causes the hydraulic pump 31 to move.
Pressurizes the pressure oil from the pressure oil supply passage 32 into the valve chamber 41. With this pressure oil, the main valve body 43 that was pressed against the plug 42
Moves to the valve seat 46 side, and the auxiliary valve body 48, which moves integrally with the main valve body 43, is seated on the valve seat 46 and is closed. Main valve body 43
Moves further to the valve seat 46 side, and when a clearance 73 is formed between the opening end of the inner diameter portion 43b and the protruding shaft 45, the pressure oil passes through the clearance 73 and the oil passage hole 51 and the oil supply / discharge passage. 50 to single acting cylinder 6
Is supplied into the pressurizing chamber 61a, and the piston rod 62 is driven in the protruding direction. Due to the protrusion of this piston rod 62,
Since the roller 66 presses the clamp jaw 10 to rotate it in the direction of the arrow X, the joint 72 and the pipe 70 are reduced in diameter by the tightening portion 12 into hexagonal and elliptical shapes, and caulked and connected. When the clamp 5 is closed and the switch 5 is released, the electric motor 3 is stopped and the pressure oil supply from the hydraulic pump 31 is stopped. Therefore, the main valve body 43 is returned to the plug 42 side by the main spring 44. Along with this, the sub valve body 48 is also returned in the same direction via the engaging piece portion 48a, so that the valve seat 46 is opened. As a result, the oil supply / discharge passage 50 communicates with the oil discharge passage 47, so that the oil on the pressurizing chamber 61a side in the cylinder body 61 flows from the oil supply / discharge passage 50 into the oil tank 33.
The oil can be drained to the piston rod 62 and the return spring
It is driven by 64 in the retracting direction to return to the return position shown in FIG. 1, and the retracting of the roller 66 allows the clamp jaw 10 to be opened to take out the joint connection product.

以上のようにスイツチ5の操作のみにより、ピストンロ
ツド62の突出および引込動作をおこなわせることができ
るので、操作が極めて簡単である。また、ピストンロツ
ド突出開始後、任意の位置で引込動作させることができ
るので、便利でありかつ安全である。
As described above, only by operating the switch 5, it is possible to perform the projecting and retracting operations of the piston rod 62, so that the operation is extremely simple. In addition, since the retracting operation can be performed at an arbitrary position after the start of the protrusion of the piston rod, it is convenient and safe.

この考案は上記実施例に限定されるものではなく、たと
えば副弁体48を弁座46側に付勢する副ばね49は、第7図
および第8図に示すように、主弁体43と副弁体48との間
に装架してもよい。なお、74は主弁体43に打込んだピン
である。また副弁体48の係合片部48aはピン状等、つば
状以外の形状としてもよい。さらに上記実施例では突軸
45の先端部をテーパ状として主弁体43のストロークの変
化に対するすきま73の絞り面積の急増を防止するように
したので、主弁体43の大きなストロークが得られ、油圧
の脈動などに対しても副弁体48を確実に弁座46に着座さ
せることができるという長所を有するものであるが、こ
のかわりに短円柱状の突軸45の先端部にスリツト状ある
いは三角溝状等の切欠きを設けたり、突軸45は単純な短
円筒状として主弁体43の内径部の開口端部をテーパ状と
するなど、上記実施例以外の形状とすることができる。
The present invention is not limited to the above-described embodiment. For example, as shown in FIGS. 7 and 8, the sub spring 49 for urging the sub valve body 48 toward the valve seat 46 is provided with the main valve body 43. It may be mounted between the sub-valve body 48. Incidentally, 74 is a pin driven into the main valve body 43. The engaging piece portion 48a of the sub valve body 48 may have a shape other than the brim shape, such as a pin shape. Further, in the above embodiment, the protruding shaft
The tip of 45 is tapered to prevent a sharp increase in the throttle area of the clearance 73 with respect to changes in the stroke of the main valve body 43, so that a large stroke of the main valve body 43 can be obtained and against pulsation of hydraulic pressure. Also has the advantage that the auxiliary valve body 48 can be reliably seated on the valve seat 46, but instead of this, a slit-shaped or triangular groove-shaped notch is formed at the tip of the short columnar protruding shaft 45. Alternatively, the protruding shaft 45 may have a shape other than the above-described embodiment, such as a simple short cylindrical shape and the opening end portion of the inner diameter portion of the main valve body 43 is tapered.

また上記実施例では単動シリンダ6の低圧室61bと油槽3
3を排油路54で接続したが、この考案は、上記排油路54
を具備せず、低圧室を大気に連通させた単動シリンダを
そなえた油圧作動機にも、適用できるものである。
In the above embodiment, the low pressure chamber 61b of the single acting cylinder 6 and the oil tank 3 are
3 was connected by the oil drain passage 54, but this invention uses the above oil drain passage 54
The present invention can also be applied to a hydraulic actuator having a single-acting cylinder that does not include the above, but has a low-pressure chamber communicating with the atmosphere.

また以上はパイプの継手部かしめ用の油圧作動機につい
て説明したが、この考案は継手以外の材料の塑性加工
用、あるいは切断、穴あけ用等、各種用途の油圧作動機
に広く適用できるものであり、この場合ポンチ、カツタ
その他の工具は、ピストンロツドに直接取付けてもよ
い。さらにこの考案はばねによつて突出位置(戻り位
置)にあるピストンロツドを油圧により引込方向へ駆動
する際に工具により加工をおこなう油圧作動機にも適用
できるものである。
Further, the hydraulic actuator for caulking the joint portion of the pipe has been described above, but the present invention can be widely applied to hydraulic actuators for various purposes such as plastic working of materials other than the joint, cutting, drilling, etc. In this case, punches, cutters and other tools may be attached directly to the piston rod. Further, the present invention can be applied to a hydraulic actuator in which a tool is used when hydraulically driving a piston rod in a projecting position (returning position) by a spring in a retracting direction.

〔考案の効果〕[Effect of device]

以上説明したようにこの考案によれば、バルブ室内に設
けた主弁体と副弁体によつて油圧ポンプの運転により圧
油供給路が給排油路に、油圧ポンプの停止により給排油
路が排油流路に、それぞれ自動的に接続されるので、油
圧ポンプ運転のスイツチ操作だけでピストンロツドの突
出および引込をおこなわせることができ、操作が簡単で
安全で作業能率がすぐれた油圧作動機が提供される。
As described above, according to the present invention, the main valve body and the sub-valve body provided in the valve chamber allow the hydraulic oil pump to operate so that the pressure oil supply passage becomes the supply / discharge oil passage, and the hydraulic pump stops to supply / exhaust oil. Since the passages are automatically connected to the oil drain passages, respectively, the piston rod can be projected and retracted only by operating the hydraulic pump to operate the switch, and the hydraulic operation is easy, safe and has high work efficiency. Motivation provided.

【図面の簡単な説明】 第1図はこの考案の一実施例を示す油圧作動機の正面
図、第2図は同じく要部縦断面図、第3図は第2図のA
−A線断面図、第4図は同じくB−B線断面図、第5図
は同じくC−C線断面図、第6図は第1図の油圧作動機
の使用状態を示すジヨー部分の縦断面図、第7図および
第8図は主弁体および副弁体の他の実施態様を示す略示
縦断面図である。 1……油圧作動機、3……電動機、6……単動シリン
ダ、10……クランプジヨー(工具)、31……油圧ポン
プ、32……圧油供給路、33……油槽、34……油槽、35…
…吸込口、41……バルブ室、41a……一端部、41b……他
端部、42……プラグ、43……主弁体、43a……つば部、4
3b……内径部、44……主ばね、45……突軸、46……弁
座、47……排油流路、48……副弁体、48a……係合片
部、49……副ばね、50……給排油路、51……通油孔、61
……シリンダ本体、61a……加圧室、61b……低圧室、62
……ピストンロツド、63……ピストン、64……戻しば
ね、66……ローラ。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a hydraulic operating machine showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same main portion, and FIG. 3 is A of FIG.
-A line cross-sectional view, FIG. 4 is the same BB line cross-sectional view, FIG. 5 is the same CC line cross-sectional view, and FIG. 6 is a longitudinal section of the yaw portion showing the usage state of the hydraulic actuator of FIG. FIGS. 7 and 8 are schematic longitudinal sectional views showing another embodiment of the main valve body and the sub valve body. 1 ... hydraulic actuator, 3 ... electric motor, 6 ... single acting cylinder, 10 ... clamping yaw (tool), 31 ... hydraulic pump, 32 ... pressure oil supply path, 33 ... oil tank, 34 ... oil tank , 35 ...
… Suction port, 41 …… Valve chamber, 41a …… One end, 41b …… Other end, 42 …… Plug, 43 …… Main valve body, 43a …… Brim, 4
3b …… inner diameter part, 44 …… main spring, 45 …… projection shaft, 46 …… valve seat, 47 …… oil drain passage, 48 …… sub valve body, 48a …… engagement piece part, 49 …… Secondary spring, 50 ... Oil supply / discharge passage, 51 ... Oil passage hole, 61
...... Cylinder body, 61a ...... Pressure chamber, 61b ...... Low pressure chamber, 62
...... Piston rod, 63 ...... Piston, 64 ...... Return spring, 66 ...... Roller.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】工具駆動用のピストンロツドに固着したピ
ストンを収容し該ピストンの戻り動作用の戻しばねをそ
なえた単動シリンダと、この単動シリンダの加圧室に吐
出側を接続され油槽に吸込側を接続された油圧ポンプと
をそなえた油圧作動機において、前記油圧ポンプに接続
された圧油供給路が一端部に開口するバルブ室内に、前
記一端部側が開口する筒状の主弁体を摺動自在に嵌装
し、この主弁体の内径部に嵌脱自在である突軸を前記バ
ルブ室の前記一端部に突設し、前記バルブ室の他端部に
は排油流路を介して前記油槽に連通する弁座を設け、前
記主弁体の前記突軸側への移動時に該主弁体に係合する
係合片部をそなえ前記弁座に接離自在である副弁体を前
記主弁体に摺動自在に取付け、前記主弁体と前記バルブ
室壁面との間に装架され該主弁体を前記突軸側に付勢す
る主ばねと、前記主弁体または前記突軸と前記副弁体と
の間に装架され該副弁体を前記弁座側に付勢する副ばね
とを具備するとともに、前記バルブ室の前記弁座寄りの
位置に開口する給排油路を、前記単動シリンダの加圧室
に接続し、前記主弁体には該主弁体の内径部と前記給排
油路とを連通する通油孔を設けたことを特徴とする油圧
作動機。
1. A single acting cylinder having a piston fixed to a tool driving piston rod and having a return spring for returning the piston; and a discharge chamber connected to a pressurizing chamber of the single acting cylinder in an oil tank. In a hydraulic actuator equipped with a hydraulic pump having a suction side connected, a tubular main valve body having the one end side opened in a valve chamber having a pressure oil supply passage connected to the hydraulic pump having one end open Is slidably fitted, and a projecting shaft which can be fitted into and removed from the inner diameter of the main valve body is projectingly provided at the one end of the valve chamber, and an oil drain passage is provided at the other end of the valve chamber. A valve seat communicating with the oil tank via a valve seat is provided, and the valve seat is provided with an engagement piece portion that engages with the main valve body when the main valve body moves toward the protruding shaft side. A valve body is slidably attached to the main valve body and mounted between the main valve body and the wall surface of the valve chamber. Installed between the main spring for biasing the main valve body toward the protruding shaft side and the main valve body or the protruding shaft and the auxiliary valve body, and biasing the auxiliary valve body toward the valve seat side. And a sub-spring, which is connected to a pressurizing chamber of the single-acting cylinder, the main valve body being connected to an oil supply / drain passage opening to a position near the valve seat of the valve chamber. A hydraulic actuator, wherein an oil passage hole is provided to connect an inner diameter portion of the oil supply passage and the oil supply / discharge oil passage.
JP1988016481U 1988-02-10 1988-02-10 Hydraulic actuator Expired - Lifetime JPH0644499Y2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP1988016481U JPH0644499Y2 (en) 1988-02-10 1988-02-10 Hydraulic actuator
US07/569,004 US5125324A (en) 1988-02-10 1990-08-17 Portable hydraulically operated device incorporating automatic drain valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988016481U JPH0644499Y2 (en) 1988-02-10 1988-02-10 Hydraulic actuator

Publications (2)

Publication Number Publication Date
JPH01127637U JPH01127637U (en) 1989-08-31
JPH0644499Y2 true JPH0644499Y2 (en) 1994-11-16

Family

ID=31229455

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988016481U Expired - Lifetime JPH0644499Y2 (en) 1988-02-10 1988-02-10 Hydraulic actuator

Country Status (1)

Country Link
JP (1) JPH0644499Y2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4923886U (en) * 1972-06-01 1974-02-28

Also Published As

Publication number Publication date
JPH01127637U (en) 1989-08-31

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