JP2784831B2 - Small cylinder device - Google Patents
Small cylinder deviceInfo
- Publication number
- JP2784831B2 JP2784831B2 JP5757190A JP5757190A JP2784831B2 JP 2784831 B2 JP2784831 B2 JP 2784831B2 JP 5757190 A JP5757190 A JP 5757190A JP 5757190 A JP5757190 A JP 5757190A JP 2784831 B2 JP2784831 B2 JP 2784831B2
- Authority
- JP
- Japan
- Prior art keywords
- piston
- stem
- cylinder
- groove
- chamber
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
- F15B15/06—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement
- F15B15/066—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member for mechanically converting rectilinear movement into non- rectilinear movement the motor being of the scotch yoke type
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、例えばバルブをエアー駆動で開閉するため
に用いる小型シリンダー装置の改良に関する。Description: TECHNICAL FIELD The present invention relates to an improvement of a small cylinder device used for opening and closing a valve by air drive, for example.
従来第７図と第８図で示すごとく、特開昭56−141406
号公報で開示された小型シリンダー装置がある。As shown in FIG. 7 and FIG.
There is a small cylinder device disclosed in Japanese Patent Publication No.
このものはシリンダー１に内装されるアルミ合金製の
ピストン2,3および回動ステム４よりなり、シリンダー
１の中央部上下に第８図のごとく貫通孔5,6を有し、こ
の貫通孔5,8に縦嵌挿入した円柱状の回動ステム４を嵌
合し、ステムの頂部4cをシリンダー１から突出させてバ
ルブの弁軸に結合しトルクを伝達する。This cylinder comprises pistons 2, 3 made of aluminum alloy and a rotating stem 4 which are housed in a cylinder 1. The cylinder 1 has through holes 5, 6 above and below the center of the cylinder 1 as shown in FIG. , 8 are fitted with a columnar rotating stem 4 inserted vertically, and the top 4c of the stem protrudes from the cylinder 1 and is connected to the valve stem of the valve to transmit torque.
回動ステム４はステムの軸方向中央部分を上下２段に
内径方向へ削られた空間S1,S2を有し、S1とS2との間に
盤状部14を有す。この盤状部14に外面が開口した外側か
ら内側へ深さをもった溝15を盤状部14の円周方向対向位
置に２組設けてある。ピストン2,3は同じ形状で、圧力
流体の圧力を受ける受圧部2a,3aと該受圧部の側部から
中央側へ延びるロッド2b,3bを有し、ロッドの外面がシ
リンダー１の内面と摺接する。ロッド2b,3bの端部には
一対のブラケット16,16,17,17が一体に突設され、この
ブラケットに軸18,19を架け渡し、軸18,19にベアリング
機能を有すローラを回転可能に遊嵌してある。このピス
トン2,3はシリンダー１の両側開口端より挿入してブラ
ケット16,17を回転ステム４の空間S1,S2に嵌め込み、軸
18,19をステム４の溝15に挿入してシリンダー１内に組
立てられ、中央室Ａと左室B,右室Ｃに区分けされる。シ
リンダー１の表面には圧力流体用ポートP1,P2を有し、
ポートP1はシリンダー１内の中央室Ａ内に直接開口し、
ポートP2はシリンダーの壁部内を縦貫する通路と連通し
該通路はシリンダー１の内部両端に開口してピストンの
受圧部で区分けされた左室B,右室Ｃに通じている。The rotating stem 4 has spaces S 1 and S 2 in which the central portion in the axial direction of the stem is cut in two steps up and down in the inner diameter direction, and has a disk-shaped portion 14 between S 1 and S 2 . The disc-shaped portion 14 is provided with two sets of grooves 15 having a depth from the outside to the inside with an open outer surface and facing the disc-shaped portion 14 in the circumferential direction. The pistons 2, 3 have the same shape and have pressure receiving portions 2a, 3a for receiving the pressure of the pressurized fluid, and rods 2b, 3b extending from the sides of the pressure receiving portion to the center, and the outer surfaces of the rods slide with the inner surface of the cylinder 1. Touch A pair of brackets 16, 16, 17 and 17 are integrally provided at the ends of the rods 2b and 3b, and the shafts 18 and 19 are bridged over the brackets, and rollers having a bearing function are rotated on the shafts 18 and 19. It is loosely fitted. The pistons 2 and 3 are inserted from both open ends of the cylinder 1 and the brackets 16 and 17 are fitted into the spaces S 1 and S 2 of the rotating stem 4,
The cylinders 18 and 19 are inserted into the groove 15 of the stem 4 and assembled in the cylinder 1 and divided into a central chamber A, a left chamber B and a right chamber C. The surface of the cylinder 1 has ports P 1 and P 2 for pressure fluid,
Port P 1 opens directly into central chamber A in cylinder 1,
Port P 2 is the passage communicates with the passage for running through the wall portion of the cylinder left chamber was divided by the pressure receiving portion of the piston is open to the internal ends of the cylinder 1 B, in communication with the right chamber C.
ポートP1から圧力エアーを供給するとピストン受圧部
2a,3aの内面への圧力作用によってピストン2,3は拡張方
向へ直線運動し、回動ステム４はピストンの軸18,19か
らステムの溝15を介して盤状部14に回動運動が伝達され
回動する。ポートP2からエアが供給された場合は、上記
と逆の方向に回動ステム４が回動し、２個のポートP1,P
2を切り換え供給することにより、ステム４と結合した
バルブを開閉作動するようになっている。Supplying pressure air from the port P 1 when the piston pressure receiving portion
Due to the pressure action on the inner surfaces of 2a and 3a, the pistons 2 and 3 linearly move in the expansion direction, and the rotating stem 4 rotates from the shafts 18 and 19 of the piston to the plate-like portion 14 through the groove 15 of the stem. It is transmitted and turns. If the air is supplied from the port P 2, pivot stem 4 in a direction reverse to the above is rotated, two ports P 1, P
By switching and supplying 2 , the valve connected to the stem 4 is opened and closed.
このようにピストン2,3の往復運動に応じてピストン
のロッド端部に装着した軸18,19が回動ステム４の溝15
内で摺動して回動ステム４の回転運動に変換してバルブ
の弁軸を回動するが、バルブの弁軸を回転するため回動
ステム４の回動トルクは大きく、又ステム４の軸芯から
溝15までの半径距離はシリンダー１内に装着する限られ
たスペースに納まる様に設計される関係上大きくするこ
とが出来ず、このためピストンの軸18,19と回動ステム
の溝15の連結係合部に大きな力が加わり、軸18,19の外
面に回転自在なローラを挿入してあっても又回動ステム
がアルミ合金製であっても、特にステムの溝15が変形や
摩耗して初期の溝15形状を保てなくなり、ピストン2,3
が運動しても回動ステム４が回動しなくなる現象が少な
い回動回数の間で生じ、頻繁にバルブの開閉作動を行わ
ねばならない個所に使用された場合は寿命が短く大きな
問題となっていた。In this way, the shafts 18 and 19 mounted on the rod end portions of the pistons in accordance with the reciprocating motion of the pistons 2 and 3
The valve slides inside the valve and converts the rotational motion into the rotational motion of the rotary stem 4 to rotate the valve shaft of the valve. The radial distance from the shaft center to the groove 15 cannot be made large because of the design to fit into the limited space to be mounted in the cylinder 1, so that the shafts 18 and 19 of the piston and the groove of the rotating stem A large force is applied to the connection engaging part of 15, and even if a rotatable roller is inserted into the outer surface of the shafts 18, 19, or even if the rotating stem is made of aluminum alloy, the groove 15 of the stem is particularly deformed. Wear and the initial groove 15 shape could not be maintained, and the pistons 2, 3
The phenomenon that the rotation stem 4 does not rotate even if the valve moves occurs during a small number of rotations, and when used in a place where the valve must be frequently opened and closed, the life is short and a serious problem. Was.
本発明は上記の課題を解決して、且つ軽量で応答性に
すぐれたシリンダー装置を提供するものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and provides a lightweight and highly responsive cylinder device.
本発明の要旨は、シリンダーの中央部に回動ステムを
ピストンの移動方向と直角に内装し、且つ前記シリンダ
ーの両側に前記回動ステムと係合する２個のピストンを
内装し、該２個のピストンによってシリンダー内室を左
室、中央室、右室に区画して、中央室と左右室への圧力
流体の切替えによりピストンを互いに対称に直線運動さ
せ、ピストンと係合する回動ステムを回転運動に変換す
るようにしたシリンダー装置において、 前記回動ステムは、前記ピストンと係合する部分にス
テムと係合する半径方向へ凹んだ溝とステムの樹脂が流
れる貫通部とを有す耐摩耗金属製の盤状体を挟んで一体
成形した合成樹脂で形成し、 前記ピストンは流体圧力を受ける受圧部と該受圧部か
ら中央側へ延びるロッドと該ロッドの端部に前記盤状体
の溝に嵌合して摺動係合する金属製の軸とを有する合成
樹脂で形成したものからなることを特徴とする小型シリ
ンダー装置である。The gist of the present invention is that a rotating stem is provided at the center of the cylinder at right angles to the direction of movement of the piston, and two pistons that engage with the rotating stem are provided on both sides of the cylinder. The inner chamber of the cylinder is divided into a left chamber, a center chamber, and a right chamber by the piston, and the piston is linearly moved symmetrically with each other by switching the pressurized fluid to the center chamber and the left and right chambers. In the cylinder device configured to convert the rotation into a rotational motion, the rotation stem has a groove that is concave in a radial direction that engages with the stem at a portion that engages with the piston, and a through portion through which resin of the stem flows. The piston is formed of a synthetic resin integrally formed with a disc-shaped body made of wear metal interposed therebetween. The piston has a pressure-receiving portion for receiving fluid pressure, a rod extending from the pressure-receiving portion toward the center, and an end of the rod having the disc-shaped body. Fit in groove A small cylinder device characterized by consisting of those formed of synthetic resin having a metal shaft which slidingly engages with.
本発明は上記の構成であるから、回動ステムとピスト
ンの本体は合成樹脂で形成されており、両者の連結結合
部である回動ステムの溝およびピストンの軸部分は耐摩
耗性の金属で構成されて、ピストンの直線運動がこの連
結結合部で回動ステムの回転運動に変換される。Since the present invention is configured as described above, the main body of the rotating stem and the piston is formed of synthetic resin, and the groove of the rotating stem and the shaft portion of the piston, which are the connecting portion of the two, are made of wear-resistant metal. When configured, the linear movement of the piston is converted at this connection into a rotational movement of the pivoting stem.
従ってシリンダーの中でも特に大きな力が加わって摺
動係合が行なわれる連結結合部は、耐摩耗性金属同士で
摺動系合されるので、溝と軸に摩耗や変形が生じず、シ
リンダーの回動回数寿命を大幅に向上させることができ
る。Therefore, since the connecting joint in which the sliding engagement is performed by applying a particularly large force in the cylinder is made of abrasion-resistant metal, the groove and the shaft are not worn or deformed, and the cylinder is not rotated. The operating life can be greatly improved.
また上記溝を形成する盤状体にはステムの樹脂が流れ
る貫通部を設けてあるので、回動ステムを射出成形する
に際して盤状体の貫通部を溶融樹脂流れるので、盤状体
と一体に容易に射出成形することができ、更に盤状体と
ステム本体の樹脂が強固に一体化される。In addition, since the through-hole through which the resin of the stem flows is provided in the board-like body forming the groove, the molten resin flows through the through-hole of the board-like body when the rotary stem is injection-molded. Injection molding can be easily performed, and the resin of the disk-shaped body and the stem body are firmly integrated.
また回動ステムとピストンの本体は合成樹脂で形成さ
れているから軽量で、シリンダー内に内装されて圧力流
体の作用により運動する圧力流体を作用した際の応答性
に秀れ、更にシリンダー装置全体としての軽量化も計れ
るものである。In addition, the body of the rotating stem and the piston is made of synthetic resin, so it is lightweight, has excellent responsiveness when the pressure fluid that moves by the action of the pressure fluid is installed inside the cylinder, and furthermore, the entire cylinder device As a result, the weight can be reduced.
以下本発明の実施例を図面に基づいて説明する。第１
図は第１実施例の回動ステム20の斜視図であって、この
回動ステム20は前記従来技術の項で説明したシリンダー
内の中央部でシリンダー上下面に穿設された貫通孔軸に
添って装着され、回動ステム20の上下端部に形成された
角穴21を介してバルブの弁軸等に連結され駆動される。
軸方向中央部分には第2,3図で示す盤状体22を設けてあ
り、盤状体22は鋼製で切削又はプレス加工によって形成
され、穴23,23とこの穴23の直角方向には対向して一対
の溝25,25を設けてある。穴23,23には全体を形成するポ
リエチレン等の樹脂を射出成形した際に上下の空間S1,S
2を形成する梁24,24,24,24の樹脂が流れて一体的に結合
されて成形される。特に回動ステム20を射出成形する
際、盤状体22の穴23、23を溶融樹脂流れるので、盤状体
22と一体に容易に射出することができ、更に盤状体22が
ステム内に強力に一体化される。Hereinafter, embodiments of the present invention will be described with reference to the drawings. First
FIG. 2 is a perspective view of a rotating stem 20 according to the first embodiment. The rotating stem 20 is attached to a through-hole shaft formed on the upper and lower surfaces of the cylinder at the center of the cylinder as described in the section of the prior art. The rotary stem 20 is attached and driven via a square hole 21 formed at the upper and lower ends of the rotating stem 20 with a valve shaft of a valve.
A plate-like body 22 shown in FIGS. 2 and 3 is provided in the center part in the axial direction, and the plate-like body 22 is made of steel and formed by cutting or press working. Are provided with a pair of grooves 25, 25 facing each other. The upper and lower spaces S 1 and S are formed in the holes 23 and 23 by injection molding of a resin such as polyethylene which forms the whole.
The resin of the beams 24, 24, 24, 24 forming the 2 flows and is integrally joined and formed. In particular, when the rotary stem 20 is injection-molded, the molten resin flows through the holes 23 and 23 of the disk-shaped body 22, so that the disk-shaped body
Injection can be easily performed integrally with the plate 22, and the disk-shaped body 22 is strongly integrated into the stem.
第４図はピストン30を示す斜視図であって、前記従来
技術の項で説明したシリンダーの両側に同じ形状のピス
トン30が２個装着される。ピストン30はポリエチレン等
の樹脂で形成され、圧力流体の圧力を受ける受圧部31の
外周にＯリング32を装着してシリンダーの内壁と密封し
て摺動される。33は受圧部31の側部より中央側へ延びる
ロッドで、ロッド33の端部に内径側に突出する一対のブ
ラケット34,34が形成され、ブラケット34,34には軸受3
5,35が嵌着され、この軸受35に回転自在に鋼製の軸36を
挿通してある。FIG. 4 is a perspective view showing the piston 30, in which two pistons 30 of the same shape are mounted on both sides of the cylinder described in the section of the prior art. The piston 30 is formed of a resin such as polyethylene. An O-ring 32 is attached to the outer periphery of a pressure receiving portion 31 that receives the pressure of the pressure fluid, and the piston 30 is slid while being sealed with the inner wall of the cylinder. Reference numeral 33 denotes a rod extending from the side of the pressure receiving portion 31 toward the center, and a pair of brackets 34, 34 protruding toward the inner diameter side is formed at the end of the rod 33, and the bearings 3 are mounted on the brackets 34, 34.
5, 35 are fitted, and a steel shaft 36 is rotatably inserted into the bearing 35.
この様に形成された回動ステム20とピストン30は回動
ステム20の上下の空間S1,S2にピストン30のブラケット3
4,34を嵌め込み、盤状体22の溝25,25にブラケットに挿
通された軸26を嵌合してシリンダー内に組付けされる。
回動ステム20とピストン30が連結される溝25と軸26は鋼
製であるから耐摩耗および耐変形に対して秀れており摩
擦抵抗が小さく、又適宜、熱処理や表面処理を行うこと
によって一層秀れたものとすることができる。このため
連結係合部の寿命を大きく向上させることができるとと
もに大部分が合成樹脂で成形されているため軽く、シリ
ンダー内での運動が容易に行われる。The pivot stem 20 and the piston 30 formed in this way are attached to the upper and lower spaces S 1 and S 2 of the pivot stem 20 by the bracket 3 of the piston 30.
4, 34 are fitted, and the shaft 26 inserted in the bracket is fitted into the grooves 25, 25 of the disk-shaped body 22, and assembled into the cylinder.
Since the groove 25 and the shaft 26 connecting the rotating stem 20 and the piston 30 are made of steel, they are excellent in abrasion resistance and deformation resistance and have low frictional resistance, and by appropriately performing heat treatment and surface treatment. It can be even better. Therefore, the life of the coupling engagement portion can be greatly improved, and since most of the coupling engagement portion is formed of a synthetic resin, it is light and can easily be moved in the cylinder.
第５図，第６図は別の実施例の回動ステム40を示すも
ので、本実施例では軸方向中央部の盤状部41も含めてあ
らかじめ本体46をポリエチレン等の樹脂で射出成形によ
って成形したのち、盤状部41の側部表面に鋼製の薄板4
2,42を貼着してステム40の盤状部41に前記実施例と同様
の溝43,43を形成してある。薄板42,42はあらかじめ盤状
部41の溝表面と合致する様にプレス成形で形成してあ
り、この両端44,44は盤状部の溝43と直角方向に設けた
穴45,45内に嵌入し固定してある。尚薄板42の溝表面へ
の固定は上記実施例に限らず、溝の底面と両側面を覆う
様にＵ字形の薄板42を用いて接着剤で貼合せてもよく、
更に又、本体46を射出成形で形成する際、この射出成形
金型内に薄板42を装着しておき、本体46を一体で成形し
て溝43の表面が鋼製の薄板42となるようにしてもよい。
この場合薄板42,42は環状にすることが可能で、接着剤
等の固定手段を用いなくとも一体成形できる。本実施例
の場合も前記実施例と同様溝43の表面は耐摩耗性を有す
る鋼製であるから、耐摩耗耐変形に対して秀れると共に
摩擦抵抗が小さく、前記ピストン30の鋼製の軸36と連結
係合された場合の寿命を大きく向上させることができ
る。更に大部分が合成樹脂で成形されているため軽く、
従来のものと比較してシリンダー内での圧力流体による
運動が容易に行われ、応答性が良い。FIGS. 5 and 6 show another embodiment of the rotating stem 40. In this embodiment, the main body 46 including the disk-shaped portion 41 at the center in the axial direction is injection-molded with a resin such as polyethylene in advance. After molding, a steel thin plate 4
Grooves 43, 43 similar to those in the above-described embodiment are formed in the board-like portion 41 of the stem 40 by sticking 2, 42 thereto. The thin plates 42, 42 are formed in advance by press molding so as to match the groove surface of the board-shaped part 41, and both ends 44, 44 are formed in holes 45, 45 provided at right angles to the groove 43 of the board-shaped part. It is fitted and fixed. Note that the fixing of the thin plate 42 to the groove surface is not limited to the above-described embodiment, and may be bonded with an adhesive using a U-shaped thin plate 42 so as to cover the bottom surface and both side surfaces of the groove,
Further, when the main body 46 is formed by injection molding, the thin plate 42 is mounted in this injection molding die, and the main body 46 is integrally formed so that the surface of the groove 43 becomes the steel thin plate 42. You may.
In this case, the thin plates 42, 42 can be formed in a ring shape and can be integrally formed without using fixing means such as an adhesive. Also in the case of the present embodiment, the surface of the groove 43 is made of wear-resistant steel as in the above-described embodiment. It is possible to greatly improve the service life when connected and engaged with 36. Furthermore, it is light because most parts are molded with synthetic resin,
The movement by the pressure fluid in the cylinder is easily performed as compared with the conventional one, and the response is good.
以上説明のごとく、本発明の小型シリンダー装置は、
軽量で圧力流体による応答性が良く、更にピストンと回
動ステムとの連結結合部の耐摩耗性、耐変形性に秀れる
とともに摩擦抵抗が少ないので寿命が長く、従来のもの
と比べて非常に高性能のものが得られた。As described above, the small cylinder device of the present invention
Light weight, good responsiveness to pressure fluid, excellent wear resistance and deformation resistance of the connecting joint between piston and rotating stem, and low frictional resistance, so long life, very much compared to conventional ones A high performance one was obtained.
第１図は本発明の実施例を示す回動ステムの斜視図、第
２図は第１図の盤状体を示す平面図、第３図は第２図の
正面図、第４図は本発明の実施例を示すピストンの斜視
図、第５図は別の実施例の回動ステムの正面図、第６図
は第５図のＡ−Ａ線断面図、第７図は従来技術を示す分
解斜視図、第８図は従来技術を示す組立断面図である。 符号の説明 20,40……回動ステム、22……盤状体、23……穴、24…
…梁、25,43……溝、30……ピストン、31……受圧部、3
3……ロッド、34……ブラケット、35……軸受、36……
軸、41……盤状部、42……鋼製薄板、45……穴、46……
本体FIG. 1 is a perspective view of a rotating stem showing an embodiment of the present invention, FIG. 2 is a plan view showing the disk-shaped body of FIG. 1, FIG. 3 is a front view of FIG. 2, and FIG. Fig. 5 is a perspective view of a piston showing an embodiment of the invention, Fig. 5 is a front view of a rotating stem of another embodiment, Fig. 6 is a sectional view taken along line AA of Fig. 5, and Fig. 7 shows a conventional technique. FIG. 8 is an exploded perspective view, and FIG. 8 is an assembled sectional view showing the prior art. Description of reference numerals 20,40 ... rotating stem, 22 ... board-like body, 23 ... hole, 24 ...
… Beam, 25,43… Groove, 30… Piston, 31… Pressure receiving part, 3
3 ... Rod, 34 ... Bracket, 35 ... Bearing, 36 ...
Shaft, 41 ... board-shaped part, 42 ... steel thin plate, 45 ... hole, 46 ...
Body
フロントページの続き (56)参考文献 特開 平２−21006（ＪＰ，Ａ) 特開 平２−72206（ＪＰ，Ａ) 特開 平１−234655（ＪＰ，Ａ) 実開 昭62−98805（ＪＰ，Ｕ) 実開 昭60−50074（ＪＰ，Ｕ) 特公 昭50−19713（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F15B 15/06Continuation of the front page (56) References JP-A-2-21006 (JP, A) JP-A-2-72206 (JP, A) JP-A-1-234655 (JP, A) JP-A-62-98805 (JP) , U) Japanese Utility Model Showa 60-50074 (JP, U) JP-B 50-19713 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) F15B 15/06
Claims (1)
ンの移動方向と直角に内装し、且つ前記シリンダーの両
側に前記回動ステムと係合する２個のピストンを内装
し、該２個のピストンによってシリンダー内室を左室、
中央室、右室に区画して、中央室と左右室への圧力流体
の切替えによりピストンを互いに対称に直線運動させ、
ピストンと係合する回動ステムを回転運動に変換するよ
うにしたシリンダー装置において、 前記回動ステムは、前記ピストンと係合する部分にステ
ムと係合する半径方向へ凹んだ溝とステムの樹脂が流れ
る貫通部とを有する耐摩耗金属製の盤状体を挟んで一体
成形した合成樹脂で形成し、 前記ピストンは流体圧力を受ける受圧部と該受圧部から
中央側へ延びるロッドと該ロッドの端部に前記盤状体の
溝に嵌合して摺動係合する金属製の軸とを有する合成樹
脂で形成したものからなることを特徴とする小型シリン
ダー装置。1. A rotating stem is provided at a central portion of a cylinder at right angles to a moving direction of a piston, and two pistons which are engaged with the rotating stem are provided on both sides of the cylinder. Left chamber of cylinder inner chamber by piston,
The piston is divided into a central chamber and a right chamber.
In a cylinder device configured to convert a rotating stem that engages with a piston into rotational motion, the rotating stem has a groove that is concave in a radial direction that engages with the stem at a portion that engages with the piston and a resin of the stem. The piston is formed of a synthetic resin integrally formed with a wear-resistant metal plate having a through portion through which the piston flows, and the piston has a pressure receiving portion receiving fluid pressure, a rod extending from the pressure receiving portion to the center side, and a rod. A small cylinder device made of a synthetic resin having an end portion made of a metal shaft fitted into the groove of the board-like body and slidingly engaged therewith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5757190A JP2784831B2 (en) | 1990-03-08 | 1990-03-08 | Small cylinder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5757190A JP2784831B2 (en) | 1990-03-08 | 1990-03-08 | Small cylinder device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03260402A JPH03260402A (en) | 1991-11-20 |
| JP2784831B2 true JP2784831B2 (en) | 1998-08-06 |
Family
ID=13059533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5757190A Expired - Lifetime JP2784831B2 (en) | 1990-03-08 | 1990-03-08 | Small cylinder device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2784831B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101621003B1 (en) | 2014-10-30 | 2016-05-13 | 핫몰드 엔지니어링주식회사 | The cylinder for up-and-down and rotational motion |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4032580B2 (en) | 1999-01-20 | 2008-01-16 | 株式会社豊田自動織機 | Piston for fluid machinery |
-
1990
- 1990-03-08 JP JP5757190A patent/JP2784831B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101621003B1 (en) | 2014-10-30 | 2016-05-13 | 핫몰드 엔지니어링주식회사 | The cylinder for up-and-down and rotational motion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03260402A (en) | 1991-11-20 |
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