JPS6044522B2 - A device that keeps the stroke length constant in a piston mechanism - Google Patents
A device that keeps the stroke length constant in a piston mechanismInfo
- Publication number
- JPS6044522B2 JPS6044522B2 JP7573075A JP7573075A JPS6044522B2 JP S6044522 B2 JPS6044522 B2 JP S6044522B2 JP 7573075 A JP7573075 A JP 7573075A JP 7573075 A JP7573075 A JP 7573075A JP S6044522 B2 JPS6044522 B2 JP S6044522B2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- air
- chamber
- switching valve
- axial direction
- 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
Links
Landscapes
- Actuator (AREA)
Description
【発明の詳細な説明】
本発明はピストン機構におけるストロータ長さを一定
にする装置に関するものてある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for keeping the length of a strobe constant in a piston mechanism.
従来からピストン機構において空気圧または液圧を利
用してピストンを一定のストロークで作動させ、当該ピ
ストンに他の装置を連結して各種の仕事を行い得るよう
にした装置は知られている。2. Description of the Related Art Conventionally, devices have been known in which a piston mechanism utilizes air pressure or hydraulic pressure to operate a piston with a constant stroke, and connects other devices to the piston to perform various tasks.
この種機構では、ピストンが一定のストローク長さで正
確に作動することが要求される。かかる要求のために提
案されたピストン作動機構の一例が実公昭45−178
7号公報に開示されている。この機構は、第5図に示す
ように、摺動弁体101を、凹溝102に係合しそれと
相対的に可動する槓子103により一定の定められた範
囲内で上昇、下降するようにして、この摺動弁体101
の可動に・より環状弁104を軸方向に可動させ、人気
通路105及び排気通路106と弁室107及び環状通
路108とのそれぞれの連通位置を切替えて、人気圧力
をダイヤフラム109で区画される上室110又は下室
111に選択的に連通させてダイ・ヤフラム109を軸
方向に上下動させ、この上下動に伴いダイヤフラム10
9に固定したピストン112を上下動させるようにした
ものである。 しカルながら、かかる機構にあつては、
摺動弁体101の上下動を制御する槓子103がスプリ
ング113の張力を受けて凹溝102内に係入しており
、スプリング113の張力と摺動弁体101に作用する
スプリング114,115の張力との均合によつて槓子
103が凹溝102から出入する構造であるため、経年
変化や金属疲労に基因してスプリング113若しくは1
14,115の張力が変化した場合、摺動弁体101の
移動ポイントが変わつてしまい、最早ピストン109を
正確なストローク長さで作動させることが出来なくなつ
てしまう問題点があつた。この発明は、従来のピストン
作動機構にみられたかかる問題点を解決せんとするもの
であつて、経年変化や金属疲労に基因して張力が変化す
るおそれのあるスプリングを用いることなく、弁を切替
えてピストンを作動させようとするものであり、シリン
ダ室2に設けたピストン体6の一方に作動シリンダ3内
に収容される作動杆7を、他方にシリンダ室2から突出
して他の装置を連結するようにしたピストン杆5をそれ
ぞれ設け、前記作動杆7の先端部を軸方向に摺動自在に
保持している支持部4bに軸方向と直交する方向に移動
可能に球体18,18を配設し、作動杆7に前記球体1
8,18と係合する係止部16,17を軸方向に間隔を
おいて環状に凹設し、前記作動シリンダ3内に軸方向に
摺動自在に切替弁筒8を収容し、切替弁筒8の内壁に前
記球体18,18が軸方向と直交する方向に自由に移動
できる2箇所の凹部19,20を形成し、前記切替弁筒
8の外周に設けた2つの鍔部8a,8bによつて作動シ
リンダ3との間に空気室9を形成し、作動シリンダ3の
側壁に3本の空気管21,22,23を接続し、もつと
もシリンダ室2に近い空気管21はシリンダ室2の作動
シリンダ室3側にある第2空気室13に連通し、次の空
気管22は前記シリンダ室2、の反対側の第1空気室2
1と連通し、もう一方の空気管23は排気管とし、前記
シリンダ室2に近い空気管21に圧力空気の供給源を接
続すると共に各々の空気管は中央の空気管22を共通し
て他の何れかの空気管21,23が選択的に切替弁筒一
8の鍔部8a,8bによつて形成される空気室9に開口
しているように配管すると共に前記作動杆7と切替弁筒
8との間に作動杆7の軸方向の移動によつて圧縮され切
替弁筒8に軸方向の移動力を付与するバネ手段14,1
5を張設したことを特徴とする。次に本発明の詳細な説
明した実施例により説明する。This type of mechanism requires the piston to operate accurately over a constant stroke length. An example of a piston operating mechanism proposed to meet such requirements is the Japanese Utility Model Publication No. 45-178.
It is disclosed in Publication No. 7. As shown in FIG. 5, in this mechanism, a sliding valve body 101 is raised and lowered within a predetermined range by a lever 103 that engages with a groove 102 and moves relative thereto. , this sliding valve body 101
The annular valve 104 is moved in the axial direction by the movement of the valve chamber 107 and the annular passage 108 to switch the communication positions of the popular passage 105 and the exhaust passage 106 and the valve chamber 107 and the annular passage 108. The diaphragm 109 is moved up and down in the axial direction by selectively communicating with the chamber 110 or the lower chamber 111, and along with this up and down movement, the diaphragm 10
A piston 112 fixed to a shaft 9 is moved up and down. However, for such a mechanism,
A lever 103 that controls the vertical movement of the sliding valve body 101 is engaged in the groove 102 under the tension of a spring 113. Since the lever 103 moves in and out of the groove 102 depending on the balance with the tension, the spring 113 or 1
If the tension of the pistons 14 and 115 changes, the movement point of the sliding valve body 101 changes, and there is a problem in that the piston 109 can no longer be operated with an accurate stroke length. The present invention aims to solve such problems in conventional piston actuation mechanisms, and allows the valve to be operated without using a spring whose tension may change due to aging or metal fatigue. The actuating rod 7 housed in the actuating cylinder 3 is placed on one side of the piston body 6 provided in the cylinder chamber 2, and the actuating rod 7, which is housed in the actuating cylinder 3, is placed on one side of the piston body 6 provided in the cylinder chamber 2, and another device is placed on the other side by protruding from the cylinder chamber 2. The piston rods 5 are connected to each other, and the spheres 18, 18 are movable in a direction perpendicular to the axial direction on a support portion 4b that holds the tip of the operating rod 7 so as to be slidable in the axial direction. The sphere 1 is arranged on the operating rod 7.
Locking portions 16 and 17 that engage with the switching valves 8 and 18 are recessed in an annular shape at intervals in the axial direction, and the switching valve cylinder 8 is accommodated in the operating cylinder 3 so as to be slidable in the axial direction. Two recesses 19 and 20 are formed on the inner wall of the cylinder 8 so that the spheres 18 and 18 can move freely in a direction perpendicular to the axial direction, and two flanges 8a and 8b are provided on the outer periphery of the switching valve cylinder 8. An air chamber 9 is formed between the working cylinder 3 and the working cylinder 3, and three air pipes 21, 22, 23 are connected to the side wall of the working cylinder 3. The next air pipe 22 is connected to the second air chamber 13 on the side of the working cylinder chamber 3, and the next air pipe 22 is connected to the first air chamber 2 on the opposite side of the cylinder chamber 2.
1, and the other air pipe 23 serves as an exhaust pipe, and a pressure air supply source is connected to the air pipe 21 near the cylinder chamber 2, and each air pipe shares a central air pipe 22 with other air pipes. The air pipes 21 and 23 are selectively connected to the air chamber 9 formed by the flanges 8a and 8b of the switching valve cylinder 18, and the operating rod 7 and the switching valve are connected to each other. Spring means 14, 1 is compressed by the axial movement of the operating rod 7 between the cylinder 8 and applies an axial moving force to the switching valve cylinder 8.
5 is provided. The invention will now be illustrated by detailed illustrated embodiments.
図において、1はシリンダ本体で一端にシリンダ室2、
他端に作動シリンダ3を形成し、作動シリンダ3は端部
が開口されていて該開口部には蓋体4が設けてある。In the figure, 1 is a cylinder body with a cylinder chamber 2 at one end,
An operating cylinder 3 is formed at the other end, and the operating cylinder 3 has an open end, and a lid 4 is provided at the opening.
5はピストン杆で前記シリンダ本体1内に収容するもの
であつて、シリンダ室″2内に収容するピストン体6に
連結される。A piston rod 5 is housed in the cylinder body 1, and is connected to a piston body 6 housed in the cylinder chamber ``2''.
ピストン体6の他方には作動シリンダ3内に収容する作
動杆7が連結される。ピストン杆5はシリンダ室2から
外部に突出して他の装置(図示しない)に連結されピス
トン杆の往復運動で前記他の装置を作動する。前記作動
シリンダ3内途中に形成した係合段部3aと、作動シリ
ンダの開口部に装着した蓋体4の水平部分4aとの間に
、作動シリンダの内壁に沿つて摺動し、且前記作動杆7
に対して自由な筒状の切替弁筒8を収容してある。An actuating rod 7 housed in the actuating cylinder 3 is connected to the other side of the piston body 6 . The piston rod 5 projects outward from the cylinder chamber 2 and is connected to another device (not shown), and the reciprocating movement of the piston rod operates the other device. The engagement step 3a formed halfway inside the actuation cylinder 3 and the horizontal portion 4a of the lid 4 attached to the opening of the actuation cylinder slide along the inner wall of the actuation cylinder, and the actuation Rod 7
A cylindrical switching valve cylinder 8 is housed therein.
切替弁筒8の外周面には2つの鍔部8a,8bによつて
空気室9が形成されている。また、鍔部8a..1こ連
続し鍔部よりは小径な帽蓋部8cを設けてある。前記作
動杆7には、前記切替弁筒8の帽蓋部8cの上下に間隔
を存してそれぞれ対向する2つの鍔体10,11を設け
、一方の鍔体10は作動シリンダ3の内壁に沿つて摺動
する。An air chamber 9 is formed on the outer peripheral surface of the switching valve cylinder 8 by two flanges 8a and 8b. Moreover, the collar part 8a. .. A cap lid portion 8c is provided which is continuous and has a smaller diameter than the brim portion. The actuating rod 7 is provided with two flanges 10 and 11 that are opposed to each other with a gap above and below the cap portion 8c of the switching valve cylinder 8, and one of the flanges 10 is attached to the inner wall of the actuating cylinder 3. slide along.
前記シリンダ室2はピストン体6によつて第1空気室1
2、第2空気室13とに区分されている。また、作動杆
の鍔体10,11と切替弁筒8の帽蓋部8cとの間には
何れもバネ14,15が装着してあつて、このバネが後
述するように作動杆を往復運動させる。作動杆7には鍔
体11から先端に向つて軸部分を小径にした第1係止部
16と第2係止部17の2つの係合部が形成されている
。The cylinder chamber 2 is connected to the first air chamber 1 by the piston body 6.
2 and a second air chamber 13. Further, springs 14 and 15 are installed between the flanges 10 and 11 of the operating rod and the cap portion 8c of the switching valve cylinder 8, and these springs cause the operating rod to reciprocate as will be described later. let The operating rod 7 is formed with two engaging portions, a first locking portion 16 and a second locking portion 17, each of which has a smaller shaft diameter from the collar body 11 toward the tip.
係合部16,17を形成された作動杆7の当該部分は、
前記蓋体4の水平部分4aに連続して作動シリンダ3内
に向つて軸方向に突出した筒状の支持部分4bに摺動自
在に保持され、この支持部4bの略中央に軸方向と直交
する方向に自由に移動可能な球体18,18が装着され
ている。前記切替弁筒8の内周面には、鍔部8aが作動
シリンダの係合段部3aに達した時に支持部4bの球体
18,18が自由に移動できる切欠凹部19を筒体の端
部全周に形成し、また切替弁筒8の下端が蓋体の水平部
分4aに達した時に球体18,18が自由に移動できる
凹部20が環状に形成されている。The portion of the operating rod 7 where the engaging portions 16 and 17 are formed,
It is slidably held by a cylindrical support part 4b that extends axially into the operating cylinder 3 and extends from the horizontal part 4a of the lid 4, and is perpendicular to the axial direction at approximately the center of this support part 4b. Spheres 18, 18 which can be freely moved in the directions shown in FIG. The inner circumferential surface of the switching valve cylinder 8 is provided with a cutout recess 19 at the end of the cylinder, through which the spheres 18, 18 of the support part 4b can move freely when the collar part 8a reaches the engagement step 3a of the actuating cylinder. An annular recess 20 is formed around the entire circumference and allows the spheres 18, 18 to move freely when the lower end of the switching valve cylinder 8 reaches the horizontal portion 4a of the lid.
そして、作動シリンダ3には3本の空気管が設けられて
いる。The operating cylinder 3 is provided with three air pipes.
空気管21,22,23は何れも平行して配設され、切
替弁筒8が作動シリンダの係合段部3aに係止している
時、第1図に示すように空気管21,22が2つの鍔部
によつて形成される空気室9と連通し、切替弁筒が蓋体
の水平部分4aに係止している時第3図に示すように空
気管22,23が前記空気室9と連通するような間隔で
設けられている。さらに作動シリンダの係合段部3aの
もつとも近い空気管21に圧力空気の供給源が接続され
、第3図に示すように切替弁筒8が下降位置にあるとき
この圧力空気は作動杆7の鍔体10に穿設した通孔24
からシリンダ室の第2空気室13に供給される。また真
中にある空気管22は前記シリンダ室2の第1空気室1
2に設けた連結口25と管26で接続されている。さら
にもう一つの空気管23は通常は排気管として作用する
ので大気に放出してもよいが、これに他の機器を接続し
て一定のタイミングで排出される空気圧を他に利用する
ことも可能である。第1図はピストン杆5が上限に達し
た状態を表している。空気管21からの圧力空気は管2
6を経てシリンダ室2の空気室12に供給され、ピスト
ン体6を下降させる。作動杆7の第2係止部17に係合
している球体18,18は作動杆の下降によつて外側に
押出され、切替弁筒8の開口部にある切欠凹部19に係
止されている(第2図参照)。球体18,18がこの状
態にある時は作動杆7は自由に移動することができるの
で、前記ピストン体6の上面に圧力が加わるとピストン
杆5は下降を開始する。The air pipes 21, 22, 23 are all arranged in parallel, and when the switching valve cylinder 8 is engaged with the engagement step 3a of the actuating cylinder, the air pipes 21, 22 are arranged in parallel, as shown in FIG. is in communication with the air chamber 9 formed by the two flanges, and when the switching valve cylinder is engaged with the horizontal portion 4a of the lid body, the air pipes 22 and 23 are connected to the air chamber 9, as shown in FIG. They are provided at intervals such that they communicate with the chamber 9. Furthermore, a supply source of pressurized air is connected to the air pipe 21 closest to the engagement stage 3a of the operating cylinder, and when the switching valve cylinder 8 is in the lowered position as shown in FIG. Through hole 24 bored in the collar body 10
The air is supplied from the air to the second air chamber 13 of the cylinder chamber. Moreover, the air pipe 22 in the middle is the first air chamber 1 of the cylinder chamber 2.
It is connected to a connecting port 25 provided in 2 through a pipe 26. Furthermore, another air pipe 23 normally acts as an exhaust pipe, so it may be released into the atmosphere, but it is also possible to connect other equipment to this and use the air pressure released at a certain timing for other purposes. It is. FIG. 1 shows a state in which the piston rod 5 has reached its upper limit. Pressure air from air pipe 21 is transferred to pipe 2.
6, the air is supplied to the air chamber 12 of the cylinder chamber 2, and the piston body 6 is lowered. The spheres 18, 18 engaged with the second locking portion 17 of the operating rod 7 are pushed outward by the lowering of the operating rod, and are locked in the notched recess 19 at the opening of the switching valve cylinder 8. (See Figure 2). When the spheres 18, 18 are in this state, the operating rod 7 can move freely, so when pressure is applied to the upper surface of the piston body 6, the piston rod 5 starts to descend.
前記作動杆7の下降によつては切替弁筒8は移動しない
からピストン杆5の下降により鍔体10と切替弁筒との
間に装着したバネ14を圧縮する。そして作動杆の第1
係止部16が球体18,18の位置に達したとき球体1
8,18は自由状態となり第1係止部16側へ移動する
。この時に前記バネ14の圧縮力が作用して切替弁筒8
を移動し、開口部の切欠凹部19が蓋体の水平部分に接
触するまで下降する(第3図)。第3図はピストン杆5
が下限に達した状態を表している。切替弁筒8が下降す
ることにより空気室9は空気管22によつて大気に連通
し、これによつてシリンダ室2の空気室12内の空気は
排出される。また空気管21からは連続して圧力空気が
供給されているので空気管21、作動シリンダ3、作動
杆の鍔体の通孔24を経てシリンダ室の空気室13へ圧
力空気を供給する。この時は切替弁筒の凹部20に球体
18,18が位置しているのでこの状態で球体は移動す
ることが可能となり、作動杆7の上昇によつて球体は外
側に押出されピストン杆5を上昇させる。作動杆7の上
昇によつては切替弁筒8は上昇しないので、鍔部11と
切替弁筒8との間に張設したバネ15を圧縮する。作動
杆の第2係止部17が球体18,18の位置に達すると
第1係止部17内に入り込むため(第4図)、バネ15
の圧縮力で切替弁筒8が急速に移動する。こうして再び
ピストン杆は上昇して上限に達した時に切替弁筒の位置
を再度切替えてシリンダ室への圧力空気の供給を変更す
ることによつてピストン杆を往復運動させる。Since the switching valve cylinder 8 does not move due to the lowering of the operating rod 7, the lowering of the piston rod 5 compresses the spring 14 installed between the collar body 10 and the switching valve cylinder. and the first operating rod
When the locking part 16 reaches the position of the spheres 18, 18, the sphere 1
8 and 18 become free and move toward the first locking portion 16 side. At this time, the compressive force of the spring 14 acts on the switching valve cylinder 8.
is moved downward until the notch recess 19 of the opening comes into contact with the horizontal portion of the lid (FIG. 3). Figure 3 shows piston rod 5
represents a state in which the lower limit has been reached. By lowering the switching valve cylinder 8, the air chamber 9 is communicated with the atmosphere through the air pipe 22, whereby the air in the air chamber 12 of the cylinder chamber 2 is discharged. Further, since pressurized air is continuously supplied from the air pipe 21, the pressurized air is supplied to the air chamber 13 of the cylinder chamber through the air pipe 21, the operating cylinder 3, and the through hole 24 of the collar of the operating rod. At this time, the spheres 18, 18 are located in the recess 20 of the switching valve cylinder, so the spheres can move in this state, and as the operating rod 7 rises, the spheres are pushed outward and push the piston rod 5. raise. Since the switching valve cylinder 8 does not rise as the operating rod 7 rises, the spring 15 stretched between the flange 11 and the switching valve cylinder 8 is compressed. When the second locking portion 17 of the operating rod reaches the position of the spheres 18, 18, it enters the first locking portion 17 (Fig. 4), so that the spring 15
The switching valve cylinder 8 moves rapidly due to the compressive force. In this way, the piston rod rises again and when it reaches the upper limit, the position of the switching valve cylinder is changed again to change the supply of pressurized air to the cylinder chamber, thereby causing the piston rod to reciprocate.
以上説明した主うに、本発明はピストン杆と一体に形成
した作動杆に作動杆の先端部を保持している支持部に設
けた球体との係合位置を2箇所設け、この係合位置の範
囲内で前記ピストン杆を往復運動させるものであつて、
圧力供給側の圧力変化等によつてピストンのストローク
長さに影響を与えることなく、確実な範囲でのストロー
ク長さが得られる効果がある。As explained above, the present invention provides two engagement positions for an operating rod formed integrally with a piston rod with a sphere provided on a support portion that holds the tip of the operating rod, and at these engagement positions. The piston rod is reciprocated within a range,
This has the effect that a stroke length within a certain range can be obtained without affecting the stroke length of the piston due to changes in pressure on the pressure supply side.
又、切替弁筒の作動を球体の移動のみによつて行うよう
にし、バネの如き作動手段を必要としないため、長期に
亘つて使用してもバネのへたり等による切替力の変化が
なく、ストローク長さに変動が生ずるおそれがない。こ
のため、常に安定した正確なストローク長さの保障を行
うことが出来るのである。In addition, since the switching valve cylinder is operated only by the movement of the sphere, and no operating means such as a spring is required, there is no change in switching force due to spring fatigue even after long-term use. , there is no risk of variation in stroke length. Therefore, it is possible to always guarantee a stable and accurate stroke length.
第1図は全体を組立てた縦断面図であつてピストン杆が
上限に達した状態を表している。
第2図は第1図において作動杆と球体との係合状態を拡
大した断面図。第3図は全体を組立てた縦断面図であつ
てピストン杆が下限に達した状態を表している。第4図
は第3図において作動杆と球体との係合状態を拡大した
断面図、第5図は従来例を示す縦断面図である。1・・
・・・シリンダ本体、2・・・・・・シリンダ室、3・
・・・・・作動シリンダ、3a・・・・・・係合段部、
4・・・・・・蓋体、4a・・・・・・水平部分、4b
・・・・・・支持部、5・・・・・ピストン杆、6・・
・・・ゼストン体、7・・・・・・作動杆、8・・・・
・・切替弁筒、8a,8b・・・・・鍔部、8c・・帽
蓋部、9・・・・・・空気室、10・・・・・・鍔体、
11・・・鍔体、12・・・・・・空気室、13・・・
・・・空気室、14・・・・・バネ、15・・・・・・
バネ、16・・・・・・係止部、17・・・・・係止部
、18・・・・・球体、19・・・・・切欠凹部、20
・・・・・・凹部、21・・・・・空気管、22・・・
・・・空気管、23・・・・・・空気管、24・ ・・
通孔、25・ ・・連結口、26・・・・・・管。FIG. 1 is a longitudinal cross-sectional view of the entire assembly, showing a state in which the piston rod has reached its upper limit. FIG. 2 is an enlarged sectional view of the state of engagement between the operating rod and the sphere in FIG. 1. FIG. 3 is a longitudinal cross-sectional view of the entire assembly, showing a state in which the piston rod has reached its lower limit. FIG. 4 is an enlarged sectional view of the state of engagement between the operating rod and the sphere in FIG. 3, and FIG. 5 is a vertical sectional view showing a conventional example. 1...
...Cylinder body, 2...Cylinder chamber, 3.
.....Operating cylinder, 3a......Engagement step part,
4...Lid body, 4a...Horizontal part, 4b
...Support part, 5...Piston rod, 6...
... Zeston body, 7... Operating rod, 8...
...Switching valve cylinder, 8a, 8b...Brim part, 8c...Cap lid part, 9...Air chamber, 10...Brim body,
11...Brim body, 12...Air chamber, 13...
...Air chamber, 14...Spring, 15...
Spring, 16... Locking part, 17... Locking part, 18... Sphere, 19... Notch recess, 20
...Recess, 21...Air pipe, 22...
...Air pipe, 23...Air pipe, 24...
Through hole, 25...Connection port, 26...Pipe.
Claims (1)
リンダ3内に収容される作動杆7を、他方にシリンダ室
2から突出して他の装置を連結するようにしたピストン
杆5をそれぞれ設け、前記作動杆7の先端部を軸方向に
摺動自在に保持している支持部4bに軸方向と直交する
方向に移動可能に球体18,18を配設し、作動杆7に
前記球体18,18と係合する係止部16,17を軸方
向に間隔をおいて環状に凹設し、前記作動シリンダ3内
に軸方向に摺動自在に切替弁筒8を収容し、切替弁筒8
の内壁に前記球体18,18が軸方向と直交する方向に
自由に移動できる2箇所の凹部19,20を形成し、前
記切替弁筒8の外周に設けた2つの鍔部8a,8bによ
つて作動シリンダ3との間に空気室9を形成し、作動シ
リンダ3の側壁に3本の空気管21,22,23を接続
し、もつともシリンダ室2に近い空気管21はシリンダ
室2の作動シリンダ室3側にある第2空気室13に連通
し、次の空気管22は前記シリンダ室2の反対側の第1
空気室12と連通し、もう一方の空気管23は排気管と
し、前記シリンダ室2に近い空気管21に圧力空気の供
給源を接続すると共に各々の空気管は中央の空気管22
を共通して他の何れかの空気管21,23が選択的に切
替弁筒8の鍔部8a,8bによつて形成される空気室9
に開口しているように配管すると共に前記作動杆7と切
替弁筒8との間に作動杆7の軸方向の移動によつて圧縮
され切替弁筒8に軸方向の移動力を付与するバネ手段1
4,15を張設したことを特徴とするピストン機構にお
けるストローク長さを一定にする装置。1. An operating rod 7 accommodated in the operating cylinder 3 is provided on one side of the piston body 6 provided in the cylinder chamber 2, and a piston rod 5 protruding from the cylinder chamber 2 and connected to other devices is provided on the other side, respectively. Spheres 18, 18 are disposed movably in a direction orthogonal to the axial direction on the support portion 4b which holds the tip of the operating rod 7 so as to be slidable in the axial direction. Locking portions 16 and 17 that engage with the switching valve cylinder 18 are recessed in an annular shape at intervals in the axial direction, and the switching valve cylinder 8 is housed in the actuating cylinder 3 so as to be slidable in the axial direction.
Two recesses 19 and 20 are formed in the inner wall of the switching valve cylinder 8 so that the spheres 18 and 18 can move freely in a direction orthogonal to the axial direction, and two flanges 8a and 8b provided on the outer periphery of the switching valve cylinder 8 An air chamber 9 is formed between the cylinder chamber 3 and the working cylinder 3, and three air pipes 21, 22, 23 are connected to the side wall of the working cylinder 3. The next air pipe 22 is connected to the second air chamber 13 on the side of the cylinder chamber 3, and the next air pipe 22 is connected to the first air chamber 13 on the opposite side of the cylinder chamber 2.
The other air pipe 23 communicates with the air chamber 12 and serves as an exhaust pipe, and a source of pressurized air is connected to the air pipe 21 near the cylinder chamber 2, and each air pipe connects to the central air pipe 22.
In common, any of the other air pipes 21, 23 can be selectively connected to the air chamber 9 formed by the flanges 8a, 8b of the switching valve cylinder 8.
A spring is provided between the operating rod 7 and the switching valve cylinder 8 so as to be open to the valve cylinder 8, and is compressed by the movement of the operating rod 7 in the axial direction to apply an axial moving force to the switching valve cylinder 8. Means 1
4. A device for making the stroke length constant in a piston mechanism, characterized in that the piston mechanism is tensioned.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7573075A JPS6044522B2 (en) | 1975-06-23 | 1975-06-23 | A device that keeps the stroke length constant in a piston mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7573075A JPS6044522B2 (en) | 1975-06-23 | 1975-06-23 | A device that keeps the stroke length constant in a piston mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS521284A JPS521284A (en) | 1977-01-07 |
JPS6044522B2 true JPS6044522B2 (en) | 1985-10-04 |
Family
ID=13584668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7573075A Expired JPS6044522B2 (en) | 1975-06-23 | 1975-06-23 | A device that keeps the stroke length constant in a piston mechanism |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6044522B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4671353A (en) * | 1986-01-06 | 1987-06-09 | Halliburton Company | Apparatus for releasing a cementing plug |
US5095808A (en) * | 1990-04-30 | 1992-03-17 | Halliburton Company | Sequential remote control plug release system |
-
1975
- 1975-06-23 JP JP7573075A patent/JPS6044522B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS521284A (en) | 1977-01-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3964455A (en) | Valve control mechanism | |
KR970006376B1 (en) | Metal diaphragm valve | |
US3980250A (en) | Device for holding tube shaped objects | |
KR20040010702A (en) | Compression ratio variable device of internal combustion engine | |
JPH0456126B2 (en) | ||
JPH0444081B2 (en) | ||
JPS6044522B2 (en) | A device that keeps the stroke length constant in a piston mechanism | |
US2618122A (en) | Telescopic hydraulic jack | |
US2763250A (en) | Valve actuating mechanism for internal combustion engines | |
US4181066A (en) | Expansible chamber motor | |
US3766835A (en) | Multi-position actuator | |
JPS5598608A (en) | Self-adjustable type hydraulic rocker bracket | |
JP2583725B2 (en) | Pneumatic cylinder device | |
EP0697540A2 (en) | Pneumatic spring, especially for the gas exchange valves of internal combustion engines | |
JPS6134305A (en) | Hermetic type oil pressure lifter | |
JPH03111611A (en) | Engine brake device | |
JP3008232U (en) | Pneumatic drive | |
SU754152A1 (en) | Pneumatic drive for valve with lever intensifier | |
US1149279A (en) | Hydraulic jack. | |
HU177331B (en) | Three-way working cylinder for remote controlling drives | |
SU848787A1 (en) | Power hydraulic cylinder | |
JPS5838198Y2 (en) | Butterfly valve opening/closing device | |
KR200144454Y1 (en) | Connecting rod of internal combustion engine | |
SU621596A1 (en) | Crank press balancing device | |
JPS6111319Y2 (en) |