JPH03260402A - Small cylinder device - Google Patents
Small cylinder deviceInfo
- Publication number
- JPH03260402A JPH03260402A JP5757190A JP5757190A JPH03260402A JP H03260402 A JPH03260402 A JP H03260402A JP 5757190 A JP5757190 A JP 5757190A JP 5757190 A JP5757190 A JP 5757190A JP H03260402 A JPH03260402 A JP H03260402A
- Authority
- JP
- Japan
- Prior art keywords
- piston
- stem
- cylinder
- synthetic resin
- groove
- 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
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 15
- 239000000057 synthetic resin Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000012530 fluid Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 230000004043 responsiveness Effects 0.000 abstract description 5
- 239000004698 Polyethylene Substances 0.000 abstract description 4
- -1 polyethylene Polymers 0.000 abstract description 4
- 229920000573 polyethylene Polymers 0.000 abstract description 4
- 238000001746 injection moulding Methods 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000005240 left ventricle Anatomy 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 210000005241 right ventricle Anatomy 0.000 description 1
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)
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a small cylinder device used, for example, to open and close a valve by air drive.
従来第７図と第８図で示すごとく、特開昭５６１４１４
０６号公報で開示された小型シリンダー装置がある。Conventionally, as shown in Figs. 7 and 8, Japanese Patent Application Laid-Open No. 561414
There is a small cylinder device disclosed in Japanese Patent No. 06.
このものはシリンダー１に内装されるアル烏合金製のピ
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５，６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 device consists of pistons 2 and 3 made of aluminum alloy and a rotating stem 4 which are housed inside a cylinder 1, and has through holes 5 and 6 at the top and bottom of the center of the cylinder 1 as shown in FIG.
A cylindrical rotating stem 4 vertically inserted into the through holes 5 and 6
The top part 4c of the stem protrudes from the cylinder 1 and connects to the valve shaft 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ＳＩ＋ ｓ２を有し、Ｓｌと５２
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組設けである。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、３
ａと該受圧部の側部から中央側へ延びるロフト２ｂ、３
ｂを有し、ロッドの外面がシリンダー１の内面と摺接す
る。The rotating stem 4 has a space SI+ s2 cut in the inner diameter direction in two stages, upper and lower, in the axial center part of the stem, and SI and 52
It has a disc-shaped part 14 between it. A groove 15 having an open outer surface and having a depth from the outside to the inside is formed in the disc-shaped part 14.
Two sets are provided at opposing positions in the circumferential direction. piston 2.3
have the same shape and receive the pressure of the pressure fluid 2a, 3.
a, and lofts 2b and 3 extending from the sides of the pressure receiving part to the center side.
b, and the outer surface of the rod is in sliding contact with the inner surface of the cylinder 1.
ロッド２ｂ、３ｂの端部には一対のブラケット１６．１
６．１７．１７が一体に突設され、このブラケットに軸
１８．１９を架は渡し、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である。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Ｓ、、 Ｓ２に嵌
め込み、軸１８．１９をステム４の１ｌｌ１５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
用ボー）Ｐ、、 Ｐ、を有し、ボートＰ、はシリンダー
１内の中央室Ａ内に直接開口し、ボート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。A pair of brackets 16.1 are provided at the ends of the rods 2b, 3b.
6, 17, and 17 are integrally protruded, and a shaft 18.19 is passed through the bracket, and a roller having a bearing function is rotatably fitted loosely to the shaft 18.19. The pistons 2 and 3 are inserted from both open ends of the cylinder 1, the brackets 16 and 17 are fitted into the spaces S and S2 of the rotating stem 4, and the shafts 18 and 19 are inserted into the 1ll15 of the stem 4 and inserted into the cylinder 1. It is assembled and divided into central chamber A, left ventricle B, and right ventricle C. The surface of the cylinder 1 has pressure fluid bows P,, P, which open directly into the central chamber A within the cylinder 1, and the boat P2 which communicates with a passage running longitudinally within the wall of the cylinder. The passage opens at both internal ends of the cylinder 1 and communicates with a left chamber B and a right chamber C, which are separated by the pressure receiving portion of the piston.
ボートＰ１から圧力エアーを供給するとピストンの受圧
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ばピストンの
軸１８．１９からステムの溝１５を介して盤状部１４に
回転運動が伝達され回動する。ボート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個のボートＰ、、 ｐｉ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。When pressurized air is supplied from the boat P1, the piston 2,
3 moves linearly in the direction of expansion, and the rotary stem 4 rotates as rotational motion is transmitted from the shaft 18, 19 of the piston to the plate-shaped portion 14 via the groove 15 of the stem. When air is supplied from the boat P2, the rotating stem 4 rotates in the opposite direction to the above, and by switching and supplying the two boats P, pi, the valve connected to the stem 4 is opened and closed. It is supposed to be done.
このようにピストン２．３の往復運動に応してピストン
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１８１９と
回動ステムの溝１５の連結保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し、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 response to the reciprocating motion of the piston 2.3, the shaft 18.19 mounted on the rod end of the piston slides in the groove 15 of the rotary stem 4 and is converted into a rotational motion of the rotary stem 4. However, since the valve shaft of the valve is rotated, the rotational torque of the rotating stem 4 is large, and the radial distance from the axis of the stem 4 to the groove 15 is such that it is installed in the cylinder 1. Because it is designed to fit in a limited space, it cannot be made larger, and therefore a large force is applied to the connection and retention part between the piston shaft 1819 and the groove 15 of the rotating stem.
Even if rotatable rollers are inserted into the outer surface of the shafts 18 and 19, and even if the rotating stem is made of aluminum alloy, the grooves 15 in the stem may be deformed or worn out and retain their initial groove 15 shape. The phenomenon in which the rotating stem 4 does not rotate even when the pistons 2 and 3 move occurs during a small number of rotations, and if the valve is used in a place where the valve must be opened and closed frequently, the service life may be shortened. was short and became a big problem.
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。The present invention solves the above problems and provides a cylinder device that is lightweight and has excellent responsiveness.
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連結される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
流体の切換えによってピストンの直線運動を回動ステム
の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、前記ピストンと連結される部分
に半径方向へ凹んだ溝を有す耐摩耗性金属の盤状体を一
体戒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設けた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 installed in the center of a cylinder perpendicular to the moving direction of the piston, and two pistons connected to the rotating stem are installed on both sides of the cylinder, and the two pistons are connected to the rotating stem. A cylinder in which the inner chamber of the cylinder is divided into a left chamber, a central chamber, and a right chamber by a piston, and the linear motion of the piston is converted into the rotational motion of a rotary stem by switching the pressure fluid between the central chamber and the left and right chambers. In the device, the rotary stem is formed of a synthetic resin integrally formed with a wear-resistant metal plate having a groove recessed in the radial direction in a portion connected to the piston, and the piston is made of synthetic resin. It is made of synthetic resin and includes a pressure receiving part that receives pressure, a rod extending from the pressure receiving part toward the center, and a metal shaft that fits into the groove of the plate-shaped body and slides at the end of the rod. This is a small cylinder device characterized by consisting of:
また前記回動ステムは、前記ピストンと連結される部分
に表面に耐摩耗性金属の薄板が貼着された径方向へ凹ん
だ溝を有す合成樹脂で形成し、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表面に耐摩耗性金属の薄板が貼
着された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であってもよい。The rotating stem is made of synthetic resin and has a radially recessed groove with a thin plate of wear-resistant metal adhered to the surface of the portion connected to the piston, and the piston is configured to absorb fluid pressure. A pressure-receiving part, a rod extending from the pressure-receiving part toward the center, and a metal shaft that fits into and slides into a groove on the surface of which a thin plate of wear-resistant metal is attached to the end of the rod. It may be made of a synthetic resin having the following.
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両者の連結係合部である回動ステム
の溝およびピストンの軸は耐摩耗性金属で構成されてピ
ストンの直線運動が回動ステムの回転運動に変換される
。従って特に大きな力が加わって摺動係合が行われる連
結保合部は耐摩耗性金属同士で摺動係合されるので、溝
と軸に摩耗や変形が生しずシリンダー〇回動回数寿命を
大巾に向上させることができる。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。Since the present invention has the above-mentioned configuration, the main bodies of the rotating stem and the piston are made of synthetic resin, and the groove of the rotating stem and the shaft of the piston, which are the connecting and engaging parts of the two, are made of wear-resistant metal, and the piston is straight. The motion is converted into a rotational motion of the pivoting stem. Therefore, the connecting and retaining parts, which undergo sliding engagement when a particularly large force is applied, are made of wear-resistant metals, so there is no wear or deformation of the groove and shaft, and the cylinder has a lifespan of 0 rotations. can be greatly improved. In addition, since the rotating stem and piston body are made of synthetic resin, they are lightweight, and have excellent responsiveness when pressure fluid is applied, which moves due to the action of pressure fluid inside the cylinder. It can also be used to reduce weight.
以下本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
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２■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を設けである
。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ｓ、、 Ｓ！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。FIG. 1 is a perspective view of a rotating stem 20 according to a first embodiment, and this rotating stem 20 has a through hole bored in the upper and lower surfaces of the cylinder at the center of the cylinder as described in the prior art section. The rotary stem 20 is mounted along the shaft and connected to the valve shaft of a valve through square holes 2 formed at the upper and lower ends of the rotary stem 20 to be driven. A disk-like body 22 shown in FIG. 2.3 is provided in the central part in the axial direction, and the disk-like body 22 is made of steel and is formed by cutting or pressing. A pair of grooves 25 and 25 are provided facing each other. When the resin such as polyethylene that forms the entire hole 23.23 is injection molded, there is a space s,, S! The resin of the beams 24, 24, 24.24 forming the beams flows and is integrally bonded and molded.
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し形状のピス
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
央側へ延びるロフトで、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ｈ３４．３４には軸受３５，３５が嵌着され、この軸
受３５に回転自在に鋼製の軸３６を挿通しである。FIG. 4 is a perspective view showing the piston 30, and two pistons 30 having the same shape are mounted on both sides of the cylinder described in the prior art section. The piston 30 is made of resin such as polyethylene, and an O-ring 32 is attached to the outer periphery of a pressure-receiving part 31 that receives pressure from a pressure fluid, so that the piston 30 slides in a sealed manner against the inner wall of the cylinder. 33 is a loft extending from the side of the pressure receiving part 31 toward the center, and a pair of brackets 34 and 34 are formed at the end of the rod 33 and protrude inwardly, and bearings 35 and 35 are fitted into the brackets h34 and 34. A steel shaft 36 is rotatably inserted through this 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Ｓｔ、 Ｓｚにピストン３０
のブラケット３４．３４を嵌め込み、盤状体２２の溝２
５．２５にブラケットに挿通された軸３６を嵌合してシ
リンダー内に組付けされる。The rotating stem 20 and the piston 30 formed in this way have the piston 30 in the spaces St and Sz above and below the rotating stem 20.
Insert the brackets 34 and 34 into the groove 2 of the plate-like body 22.
At 5.25, the shaft 36 inserted into the bracket is fitted and assembled into the cylinder.
回動ステム２０とピストン３０が連結される溝２５と軸
３６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。Since the groove 25 and shaft 36 connecting the rotating stem 20 and the piston 30 are made of steel, they have excellent wear resistance and deformation resistance, and have low frictional resistance. It can be made even better.
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。Therefore, the life of the connecting and engaging portion can be greatly improved, and since most of it is molded from synthetic resin, it is light and can be easily moved within 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
あらかしめ本体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４２．４２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を形成しである。薄板４
２．４２ばあらかしめ盤状部４１の溝表面と合致する様
にブ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
し固定しである。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と一体で成形して溝４
３の表面が鋼製の薄板４２となるようにしてもよい。FIGS. 5 and 6 show a rotary stem 40 according to another embodiment. In this embodiment, a pre-sealed main body 46 including a disk-shaped portion 41 at the center in the axial direction is injection molded from a resin such as polyethylene. After the stem 40 is formed by molding, a thin steel plate 42, 42 is attached to the side surface of the disc-shaped part 41, and grooves 43, 43 similar to those in the previous embodiment are formed in the disc-shaped part 41 of the stem 40. thin plate 4
2.42 is formed by press molding so as to match the groove surface of the disc-shaped part 41, and both ends 44, 44 are inserted into holes 45° 45 provided perpendicularly to the grooves 43 of the disc-shaped part. It is fitted and fixed. The fixing of the thin plate 42 to the groove surface is not limited to the above embodiment, but the U-shaped thin plate 42 may be attached with adhesive so as to cover the bottom and both side surfaces of the groove. When forming by injection molding, the thin plate 42 is installed in the injection mold, and is molded integrally with the main body 46 to form the groove 4.
3 may be made of a thin steel plate 42.
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太き（向上させるこ
とができる。更に大部分が合成樹脂で底形されているた
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。In this case, the thin plates 42, 42 can be annular and can be integrally molded without using adhesive or other fixing means. In the case of this embodiment as well, the surface of the groove 43 is made of wear-resistant steel, as in the previous embodiment, so that it is excellent in wear resistance and deformation resistance, and has low frictional resistance. 36, the life span can be increased (improved).Furthermore, since most of the bottom is made of synthetic resin, it is light, and compared to conventional cylinders, movement by pressurized fluid within the cylinder is possible. is easily performed and has good responsiveness.
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 explained above, the small cylinder device of the present invention is lightweight, has good responsiveness to pressure fluid, and has excellent wear resistance and deformation resistance at the connecting joint between the piston and the rotating stem, as well as low frictional resistance. This results in a product with a long lifespan and extremely high performance compared to conventional products.
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。
付号の説明
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、３３・・・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・・・本体第８図
第５図
２１−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 plate-like body of Fig. 1, Fig. 3 is a front view of Fig. 2, and Fig. 4 is a main body. 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 A-A in FIG. 5, and FIG. 7 shows a prior art. FIG. 8 is an exploded perspective view and an assembled sectional view showing the prior art. Explanation of numbers 20. 40... Rotating stem, 22... Disk-shaped body, 23
... hole, 24 ... beam, 25.43 ... groove, 30.
...Piston, 31...Pressure receiving part, 33...Rod,
34...Bracket, 35...Bearing, 36...Shaft, 41...Plate-shaped portion, 42...Steel thin plate, 45...
Hole, 46...Main body Fig. 8 Fig. 5 21-
Claims (1)
方向と直角に内装し、且つ前記シリンダーの両側に前記
回動ステムと連結される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換え
によりピストンの直線運動を回動ステムの回転運動に変
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、前記ピストンと連結される部分に半
径方向へ凹んだ溝を有す耐摩耗性金属の盤状体を一体成
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。 ２）特許請求の範囲第１項記載において、前記回動ステ
ムは、前記ピストンと連結される部分に表面に耐摩耗性
金属の薄板が貼着された径方向へ凹んだ溝を有す合成樹
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
に前記表面に耐摩耗性金属の薄板が貼着された溝に嵌合
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
。[Scope of Claims] 1) A rotary stem is installed in the center of the cylinder perpendicular to the direction of movement of the piston, and two pistons connected to the rotary stem are installed on both sides of the cylinder. 2
The inner chamber of the cylinder is divided into a left chamber, a central chamber, and
In a cylinder device that is divided into a right chamber and converts linear motion of a piston into rotational motion of a rotating stem by switching pressure fluid between a central chamber and left and right chambers, the rotating stem is connected to the piston. The piston is made of a synthetic resin integrally molded with a wear-resistant metal plate having a groove recessed in the radial direction in the area where the piston is formed, and the piston includes a pressure receiving part that receives fluid pressure and a rod extending from the pressure receiving part toward the center. and a metal shaft that fits and slides into the groove of the plate-like body at the end of the rod, and is made of synthetic resin. 2) In claim 1, the rotating stem is made of synthetic resin having a radially recessed groove on the surface of which a thin plate of wear-resistant metal is adhered to a portion connected to the piston. The piston is formed of a pressure receiving part that receives fluid pressure, a rod extending from the pressure receiving part toward the center, and a groove that fits into the end of the rod with a thin plate of wear-resistant metal affixed to the surface. 1. A small cylinder device, characterized in that it is made of synthetic resin and has a metal shaft that is slidably engaged with the cylinder.
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 true JPH03260402A (en) | 1991-11-20 |
| JP2784831B2 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 |
|---|---|---|---|---|
| EP1022463A3 (en) * | 1999-01-20 | 2000-12-27 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Piston for fluid machines |
Families Citing this family (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 |
-
1990
- 1990-03-08 JP JP5757190A patent/JP2784831B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1022463A3 (en) * | 1999-01-20 | 2000-12-27 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Piston for fluid machines |
| US6339984B1 (en) | 1999-01-20 | 2002-01-22 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Piston for fluid machines |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2784831B2 (en) | 1998-08-06 |
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