JPH0248362B2 - - Google Patents
Info
- Publication number
- JPH0248362B2 JPH0248362B2 JP59212239A JP21223984A JPH0248362B2 JP H0248362 B2 JPH0248362 B2 JP H0248362B2 JP 59212239 A JP59212239 A JP 59212239A JP 21223984 A JP21223984 A JP 21223984A JP H0248362 B2 JPH0248362 B2 JP H0248362B2
- Authority
- JP
- Japan
- Prior art keywords
- gripping
- layer
- pressure
- cylindrical
- sleeve
- 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
- 239000012530 fluid Substances 0.000 claims description 29
- 230000002093 peripheral effect Effects 0.000 description 18
- 230000005489 elastic deformation Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/24—Chucks characterised by features relating primarily to remote control of the gripping means
- B23B31/30—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck
- B23B31/305—Chucks characterised by features relating primarily to remote control of the gripping means using fluid-pressure means in the chuck the gripping means is a deformable sleeve
Description
【発明の詳細な説明】
本願発明は次に述べる問題点の解決を目的とす
る。DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.
（産業上の利用分野）
この発明は機械加工又は検査等の為に油、水、
グリース等の流体に加えた圧力によつてスリーブ
の把持部を弾性限度内で半径方向へ膨張、収縮さ
せて工作物、工具等の被把持物を把持する流体圧
による把持装置に関するものである。(Industrial Application Field) This invention can be used for machining, inspection, etc.
The present invention relates to a gripping device using fluid pressure that grips an object to be gripped, such as a workpiece or a tool, by expanding and contracting the gripping portion of a sleeve in the radial direction within elastic limits by applying pressure to a fluid such as grease.
（従来の技術）
従来のこの種の流体圧による把持装置にあつて
は、第８図に示すように筒状のスリーブ６Ａの軸
線方向の一部に径方向へ弾性変形可能な筒状の把
持部１１Ａを設け、その把持部１１Ａの外周側に
流体の圧力を加えて把持部１１Ａを中心側へ膨張
させるようになつているので、把持部１１Ａが仮
想線にて示すようにその軸線を通る平面上でみて
円弧状に膨張して把持部内周面の中央部分の一線
上でのみ被把持物１０Ａを把持し、被把持物１０
Ａが把持部１１Ａの軸線に対して傾いて把持され
易く、把持精度が低くしかも不安定であるという
問題があつた。また把持部がその軸線と直交する
平面上でみて第９図に示すように基準円Ｈに対し
て三角のおむすび形又は楕円状に変形し、把持部
内周面の当接箇所が３箇所又は２箇所の僅かな箇
所で被把持物１０Ａの外周面Ｎに当接してこれを
把持するようになつているので、把持部内周面と
被把持物との接触面積が小さくなり、被把持物の
把持力が低いという問題もあつた。(Prior Art) In a conventional gripping device using fluid pressure of this kind, as shown in FIG. 11A is provided, and the gripping portion 11A is expanded toward the center by applying fluid pressure to the outer circumferential side of the gripping portion 11A, so that the gripping portion 11A passes through its axis as shown by an imaginary line. When viewed on a plane, the object 10A expands in an arc shape and grips the object 10A only on a line in the center of the inner circumferential surface of the gripping portion.
There was a problem in that A was likely to be held at an angle with respect to the axis of the gripping portion 11A, resulting in low and unstable gripping accuracy. In addition, when viewed on a plane orthogonal to the axis, the grip part deforms into a triangular rice ball shape or an ellipse shape with respect to the reference circle H, as shown in FIG. Since the object to be gripped 10A is gripped by contacting the outer circumferential surface N of the object to be gripped at only a few places, the contact area between the inner peripheral surface of the gripping part and the object to be gripped is small, and the grip of the object to be gripped is reduced. There was also the problem of low power.
また従来、実開昭59−12507号公報によつて知
られているように、第８図の把持部１１Ａの軸線
方向の中間に肉厚部を形成して把持部１１Ａの軸
線方向の２箇所に当接部が生じるようにして把持
精度を高めるようにしたものも提案されている
が、このような装置であつても、上記第９図に示
すように基準円Ｈに対して三角のおむすび形又は
楕円状に変形し、把持部内周面の当接箇所が３箇
所又は２箇所の僅かな箇所で被把持物１０Ａの外
周面Ｎに当接してこれを把持するようになると言
う欠点は解決できず、その上両把持部の変形のば
らつきの為に被把持物の把持精度が低く、しかも
被把持物の把持力が弱いという問題があつた。 Furthermore, as is conventionally known from Japanese Utility Model Application Publication No. 59-12507, a thick part is formed in the middle of the gripping part 11A in the axial direction as shown in FIG. A device has been proposed in which the gripping accuracy is increased by creating an abutting portion at This solves the problem of deformation into an elliptical shape and contacting the outer circumferential surface N of the object to be grasped 10A at only three or two contact points on the inner circumferential surface of the gripping portion. In addition, there were problems in that the gripping accuracy of the object to be gripped was low due to variations in deformation of both gripping portions, and the gripping force for the object to be gripped was weak.
（発明が解決しようとする問題点）
この発明は上記従来の問題点を除き、被把持物
をその軸線が把持部の軸線と略一致するように高
い精度で安定的に把持でき、しかも軸線と直角な
面でみて被把持物１０Ａの外周面Ｎに対する当接
箇所を大幅に増加させることができて被把持物に
対する把持力を大幅に増大させ得るようにした流
体圧による把持装置を提供しようとするものであ
る。(Problems to be Solved by the Invention) The present invention eliminates the above-mentioned conventional problems and can stably grip an object with high precision so that the axis of the object substantially coincides with the axis of the gripping part. It is an object of the present invention to provide a gripping device using fluid pressure that can significantly increase the number of contact points with the outer circumferential surface N of the gripped object 10A when viewed from a perpendicular plane, and can significantly increase the gripping force on the gripped object. It is something to do.
本願発明の構成は次の通りである。 The configuration of the present invention is as follows.
（問題点を解決する為の手段）
本願発明は、筒状のスリーブを備え、そのスリ
ーブにあつては、軸線方向の一部に径方向へ弾性
変形可能な筒状の把持部を有すると共にその把持
部の両側に肉厚の剛体から成る強壁部を夫々有
し、上記把持部はその一面を把持面に、その他面
を被圧面に夫々構成し、その被圧面に流体の圧力
を付与するようにしてある流体圧による把持装置
において、上記筒状の把持部は、その把持部の把
持面側に位置する筒状の第１層部と、その第１層
部よりも被圧面側に位置し、第１層部と重合させ
てある第２層部とで構成し、上記第１層部は径方
向へ弾性変形可能な薄肉に形成してあり、上記第
２層部は把持部の軸線方向の略中間位置にあつて
軸線方向の両側に上記第１層部のみの層が形成さ
れるように短い区間に配置され、かつ第１層部と
一体化させて径方向には第１層部のみの層よりも
厚肉となるように形成してあり、さらに第２層部
の周方向には、軸線方向の溝を多数形成して、把
持部が被圧変形するときには上記軸線と直角な面
で見て上記の第２層部に形成した各溝位置で大き
く変形するようにしものであつてその作用は次の
通りである。(Means for Solving the Problems) The present invention includes a cylindrical sleeve, and the sleeve has a cylindrical gripping portion that can be elastically deformed in the radial direction in a part of the axial direction. The gripping portion has strong walls made of thick rigid bodies on both sides, and the gripping portion has one side as a gripping surface and the other surface as a pressurized surface, and applies fluid pressure to the pressurized surface. In such a fluid pressure gripping device, the cylindrical gripping portion has a cylindrical first layer portion located on the gripping surface side of the gripping portion, and a cylindrical first layer portion located on the pressure receiving surface side with respect to the first layer portion. The first layer is formed with a thin layer that can be elastically deformed in the radial direction, and the second layer is formed with a thin wall that can be elastically deformed in the radial direction. The first layer is arranged in a short section so that only the first layer is formed on both sides in the axial direction, and the first layer is integrated with the first layer in the radial direction. Furthermore, a large number of axial grooves are formed in the circumferential direction of the second layer, so that when the gripping part is deformed under pressure, it is perpendicular to the axis. Viewed from a general point of view, the structure is designed to be largely deformed at each groove position formed in the second layer, and its function is as follows.
（作用）
スリーブの把持部の被圧面に流体の圧力を加え
ると、この流体がスリーブの把持部を弾性変形に
よつて把持面側へ膨張させる。この場合、把持部
の軸線方向の両端部が大きく弾性変形し、把持部
の略中央部分の弾性変形が抑制されることによつ
て、把持部の把持面の略中央部分が把持部の軸線
と略平行な面で変形し、この把持面の略中央部分
で被把持物を把持する。また、把持部の周方向に
設けられた多数の溝により把持部の周囲は多数に
区分されるから軸線に直交する面からみて把持部
の内周面の当接箇所が増加し、これらの円周方向
の多数箇所で被把持物を把持する。(Function) When fluid pressure is applied to the pressure-receiving surface of the gripping portion of the sleeve, this fluid causes the gripping portion of the sleeve to expand toward the gripping surface through elastic deformation. In this case, both ends of the gripping part in the axial direction are largely elastically deformed, and the elastic deformation of the approximately central part of the gripping part is suppressed, so that the approximately central part of the gripping surface of the gripping part is aligned with the axis of the gripping part. It deforms in a substantially parallel plane, and grasps the object to be grasped at a substantially central portion of this grasping plane. In addition, since the circumference of the grip part is divided into many parts by the many grooves provided in the circumferential direction of the grip part, the contact points of the inner circumferential surface of the grip part increase when viewed from a plane perpendicular to the axis, and these circles The object to be gripped is gripped at multiple points in the circumferential direction.
（実施例）
以下本願の実施例を示す図面について説明す
る。図面は流体圧による把持装置を被把持物の外
周面を把持する工具把持チヤツクに実施した場合
を示している。第１図、第２図において、１は厚
肉の筒状の剛体から成る本体で、後端部（第１図
において左端部）には工作機械のスピンドル等に
嵌着させる為のシヤンク部２が形成されている。
３は本体１の中心部に形成された嵌合孔、４，５
は嵌合孔３の内周面に形成された環状のシール溝
である。６は上記嵌合孔３に嵌合された筒状のス
リーブで、前端部外周に形成された取付鍔７が取
付ねじ８によつて本体１の前面に止着されてい
る。このスリーブ６は周壁を薄肉にするとその周
壁が径方向へ弾性変形可能になり、周壁を厚肉に
するとその周壁が径方向へ弾性変形しなくなるよ
うに金属材料等によつて構成されている。このス
リーブ６において、９は中心部に形成された挿入
孔で、工具等の被把持物１０を挿入し得るように
なつている。１１は軸線方向の一部に径方向へ弾
性変形可能に形成された筒状の把持部で、スリー
ブ６の外周に環状溝１２を形成することによつて
構成され、その内周面が把持面に、外周面が被圧
面になつている。この把持部１１は第３図、第４
図に示すように径方向へ弾性変形可能な薄肉の第
１層部として例示する内層部１３と、その内層部
１３の外周側に位置されている第２層部として例
示する外層部１４とで二重層状に構成されてい
る。上記外層部１４において、１５は把持部１１
の軸線方向の略中央部分に内層部１３と一体に径
方向へ厚肉に形成することによつて構成された環
状の厚肉部である。１７は上記把持部１１の被圧
面側（外周側）に形成された溝で、把持部１１の
外周を複数に区分する位置に夫々軸線方向へ設け
られている。これらの溝１７は把持部１１の軸線
に対して傾斜していても良く、又それらの断面形
状の大きさは総て同じくすることが好ましいが、
必ずしもこれに限定されるものではなく、種々異
ならせても良い。また上記スリーブ６において、
１８は上記把持部１１の両側に形成された強壁部
で、厚肉の剛体によつて筒状に形成されている。(Example) Below, drawings showing examples of the present application will be described. The drawings show a case in which a gripping device using fluid pressure is implemented in a tool gripping chuck that grips the outer peripheral surface of an object to be gripped. In Figs. 1 and 2, reference numeral 1 denotes a main body made of a thick-walled cylindrical rigid body, and the rear end (left end in Fig. 1) has a shank part 2 for fitting into the spindle of a machine tool, etc. is formed.
3 is a fitting hole formed in the center of the main body 1; 4, 5;
is an annular seal groove formed on the inner peripheral surface of the fitting hole 3. A cylindrical sleeve 6 is fitted into the fitting hole 3, and a mounting collar 7 formed on the outer periphery of the front end is fixed to the front surface of the main body 1 by a mounting screw 8. This sleeve 6 is made of a metal material or the like so that when the circumferential wall is made thin, the circumferential wall can be elastically deformed in the radial direction, and when the circumferential wall is made thick, the circumferential wall cannot be elastically deformed in the radial direction. In this sleeve 6, reference numeral 9 denotes an insertion hole formed in the center, into which a grasped object 10 such as a tool can be inserted. Reference numeral 11 denotes a cylindrical gripping part formed in a part in the axial direction so as to be elastically deformable in the radial direction, and is constructed by forming an annular groove 12 on the outer periphery of the sleeve 6, and the inner peripheral surface thereof is a gripping surface. In addition, the outer peripheral surface is the pressure-receiving surface. This gripping portion 11 is shown in FIGS. 3 and 4.
As shown in the figure, the inner layer part 13 is exemplified as a thin first layer part that can be elastically deformed in the radial direction, and the outer layer part 14 is exemplified as a second layer part located on the outer peripheral side of the inner layer part 13. It is composed of double layers. In the outer layer part 14, 15 is the grip part 11
It is an annular thick part formed by integrally forming a thick part in the radial direction with the inner layer part 13 at a substantially central part in the axial direction of the inner layer part 13. Reference numeral 17 denotes a groove formed on the pressure-receiving surface side (outer circumferential side) of the gripping part 11, and is provided in the axial direction at a position that divides the outer circumference of the gripping part 11 into a plurality of parts. These grooves 17 may be inclined with respect to the axis of the gripping part 11, and it is preferable that their cross-sectional shapes are all the same size.
It is not necessarily limited to this, and various changes may be made. Further, in the sleeve 6,
Reference numeral 18 denotes strong wall portions formed on both sides of the gripping portion 11, which are formed into a cylindrical shape by a thick rigid body.
次に、１９，２０は上記シール溝４，５に嵌合
された環状のシール材で、上記嵌合孔３内周面と
強壁部１８外周面間を全周に亘つて密にシールし
ている。２１は把持部１１の外周面と嵌合孔３の
内周面との間に全周に亘つて形成された環状空間
で、上記シール材１９，２０によつて密閉されて
いる。２２は本体１に形成されたシリンダ孔で、
入口部内面には雌ねじ２２ａが刻設されている。
２３はシリンダ孔２２に摺動自在に嵌合されたピ
ストン、２４は上記雌ねじ２２ａに螺合された加
圧ねじで、レンチ孔２４ａが形成されている。２
５はピストン２３と加圧ねじ２４間に可動的に介
在された鋼球である。２６は上記シリンダ孔２２
のピストン２３より奥側に形成された加圧室２７
と上記環状空間２１を連通する連通孔、２８は上
記連通孔２６を加工する為の孔で、シール材２
９、鋼球３０及び止めねじ３１によつて塞がれて
いる。上記シリンダ孔２２から止めねじ３０まで
の構成は第２図に示すように２組設けられてい
る。上記環状空間２１、加圧室２７及び連通孔２
６内には油、水又はグリース等の流体が充満され
ている。 Next, 19 and 20 are annular sealing materials fitted into the seal grooves 4 and 5 to tightly seal the entire circumference between the inner peripheral surface of the fitting hole 3 and the outer peripheral surface of the strong wall portion 18. ing. Reference numeral 21 denotes an annular space formed along the entire circumference between the outer peripheral surface of the gripping portion 11 and the inner peripheral surface of the fitting hole 3, and is sealed by the sealing materials 19 and 20. 22 is a cylinder hole formed in the main body 1;
A female thread 22a is formed on the inner surface of the inlet portion.
A piston 23 is slidably fitted into the cylinder hole 22, and a pressure screw 24 is screwed into the female thread 22a, forming a wrench hole 24a. 2
5 is a steel ball movably interposed between the piston 23 and the pressure screw 24. 26 is the cylinder hole 22
A pressurizing chamber 27 formed on the back side of the piston 23 of
A communication hole 28 communicates the annular space 21 with the annular space 21, and 28 is a hole for processing the communication hole 26.
9. It is closed by a steel ball 30 and a set screw 31. As shown in FIG. 2, two sets are provided from the cylinder hole 22 to the set screw 30. The annular space 21, pressurized chamber 27 and communication hole 2
6 is filled with fluid such as oil, water, or grease.
上記構成のものにあつては、本体１のシヤンク
部２を工作機械のスピンドルに嵌合固着して使用
する。また、上記構成の流体圧による把持装置に
あつては、被把持物１０を把持しない通常のとき
には、加圧ねじ２４を弛めて加圧室２７や環状空
間２１内の流体に圧力がほとんど加わらないよう
にしておく。この状態においては、スリーブ６の
把持部１１の外周側には圧力がほとんど加わら
ず、その把持部１１は第１図、第３図に実線で示
すように弾性変形しない自然状態に維持される。
次に、上記流体圧による把持装置に被把持物１０
を把持させる場合には、先ずその被把持物１０を
スリーブ６の挿入孔９に挿入した後、加圧ねじ２
４のレンチ孔２４ａにレンチを嵌合させて加圧ね
じ２４を締付け方向へ回動させる。この加圧ねじ
２４の締付けによつて鋼球２５を介してピストン
２３が押し込まれ、これにより加圧室２７内の流
体に圧力が加わり、この圧力が連通孔２６を通し
て環状空間２１内の流体に伝えられる。この環状
空間２１内の流体の圧力が高くなると、この高圧
が把持部１１の外周面に加わつてその把持部１１
を中心側へ弾性変形させて内方へ膨張させ、その
結果把持部１１の内周面で被把持物１０の外周面
を締付ける。この場合、把持部１１が薄肉の内層
部１３とこの内層部１３の外周側に設けられた外
層部１４とで構成され、その外層部１４が軸線方
向の略中央部分に内層部１３と一体の肉厚部１５
を備えると共にその肉厚部１５の周囲を複数に区
分する位置に夫々軸線方向の溝１７を備えている
ので、内層部１３の両端部分で中心側へ大きく膨
張されるも、肉厚部１５に対応する内層部１３の
略中央部分で中心側への膨張が抑制される。従つ
て、把持部１１の内周面は第３図に波線で示すよ
うに内側へ弾性変形され、肉厚部１５に対応する
把持部１１内周面が把持部１１の軸線に対して略
平行状態のまま中心側へ変形される。従つて、被
把持物１０の外周面は上記把持部１１の平行的な
膨張部分によつて安定的に把持され、被把持物１
０の軸線を把持部１１の軸線に一致させることが
できる。また、把持部１１の外層部１４が外周を
複数に区分する位置に夫々溝１７を備えているの
で、把持部１１の内層部１３が第５図に示すよう
に溝１７に対応する部分で内層部１３の基準円ｈ
に対して中心側へ大きく膨張し、これらの多数の
膨張部分で被把持物１０の外周面ｎを把持するこ
とができる。従つて、被把持物１０と把持部１１
との接触面積が大きくなつて被把持物１０の把持
力を大きくすることができる。 In the case of the above structure, the shank portion 2 of the main body 1 is used by fitting and fixing it to the spindle of a machine tool. In addition, in the gripping device using fluid pressure having the above configuration, when the object to be gripped 10 is not gripped, the pressure screw 24 is loosened so that almost no pressure is applied to the fluid in the pressurization chamber 27 or the annular space 21. Make sure there are no. In this state, almost no pressure is applied to the outer peripheral side of the gripping part 11 of the sleeve 6, and the gripping part 11 is maintained in a natural state without elastic deformation, as shown by solid lines in FIGS. 1 and 3.
Next, the grasped object 10 is placed in the grasping device using the fluid pressure.
When gripping the object 10, first insert the object 10 into the insertion hole 9 of the sleeve 6, and then tighten the pressure screw 2.
A wrench is fitted into the wrench hole 24a of No. 4, and the pressure screw 24 is rotated in the tightening direction. By tightening the pressure screw 24, the piston 23 is pushed through the steel ball 25, which applies pressure to the fluid in the pressure chamber 27, and this pressure is applied to the fluid in the annular space 21 through the communication hole 26. Reportedly. When the pressure of the fluid in this annular space 21 increases, this high pressure is applied to the outer peripheral surface of the gripping part 11 and the gripping part 11
is elastically deformed toward the center and expanded inward, and as a result, the inner circumferential surface of the gripping portion 11 tightens the outer circumferential surface of the object to be grasped 10 . In this case, the gripping part 11 is composed of a thin inner layer part 13 and an outer layer part 14 provided on the outer peripheral side of the inner layer part 13, and the outer layer part 14 is formed integrally with the inner layer part 13 at a substantially central part in the axial direction. Thick part 15
and grooves 17 in the axial direction are provided at positions dividing the periphery of the thick part 15 into a plurality of parts. Expansion toward the center is suppressed at a substantially central portion of the corresponding inner layer portion 13 . Therefore, the inner peripheral surface of the gripping part 11 is elastically deformed inward as shown by the dotted line in FIG. It is deformed toward the center without changing the state. Therefore, the outer circumferential surface of the object to be grasped 10 is stably grasped by the parallel expanded portion of the gripping section 11, and the object to be grasped 1
0 can be made to coincide with the axis of the gripping part 11. Furthermore, since the outer layer 14 of the gripping part 11 is provided with grooves 17 at positions that divide the outer periphery into a plurality of parts, the inner layer 13 of the gripping part 11 has the inner layer at a portion corresponding to the groove 17 as shown in FIG. Reference circle h of part 13
It expands greatly toward the center, and can grip the outer circumferential surface n of the object to be gripped 10 with these many expanded portions. Therefore, the object to be grasped 10 and the grasping section 11
Since the contact area with the object 10 is increased, the gripping force of the object 10 can be increased.
次に、把持部１１に把持されている被把持物１
０を取外したい場合には、加圧ねじ２４を弛め、
環状空間２１内の流体の圧力を低下させる。これ
により把持部１１の上記弾性変形が旧に復して被
把持物１０の把持を解除し、その被把持物１０を
挿入孔９から抜き取ることができる。 Next, the object 1 held by the gripping part 11
If you want to remove 0, loosen the pressure screw 24,
The pressure of the fluid in the annular space 21 is reduced. As a result, the above-mentioned elastic deformation of the gripping portion 11 is restored to its original state, and the grip on the object to be gripped 10 is released, and the object to be gripped 10 can be pulled out from the insertion hole 9.
第６図は本願の異なる実施例を示すもので、各
溝１７ｅを把持部１１ｅの外周側（被圧面側）に
その把持部１１ｅの軸線方向の長さの全範囲に亘
る長さに形成したもので、上記実施例と同様に作
用する。なお上記実施例と同一若しくは均等構成
と考えられる部分には対応する部分と同一の符号
にアルフアベツトのｅを付して重複説明を省略す
る。（また次図に示す実施例についても同様にア
ルフアベツトのｆを付して重複説明を省略する。）
第７図は本願の別の異なる実施例を示すもの
で、ギヤ等の被把持物１０ｆの内周面を把持する
取付具に実施したものである。筒状の本体１ｆの
外周には中間部分に取付フランジ５０が形成さ
れ、この取付フランジ５０の取付孔５０ａに挿入
した取付ボルトによつて本体１ｆをスピンドル等
に締付固定し得るようになつている。上記本体１
ｆの一端側（右端側）外周にスリーブ６ｆが嵌合
されている。このスリーブ６ｆは本体１ｆの一端
部外周に螺合された締付ナツト８ｆによつて上記
取付フランジ５０に締付けられている。上記スリ
ーブ６ｆの中間部には内周に環状溝１２ｆを形成
することによつて薄肉の把持部１１ｆが形成さ
れ、この把持部１１ｆの内周面が被圧面に、外周
面が把持面に構成されている。この把持部１１ｆ
は第１層部として例示する外層部１３ｆと第２層
部として例示する内層部１４ｆとで二重層状に構
成されている。上記把持部１１ｆの外周側には溝
１７ｆが把持部１１ｆの軸線方向の長さの全範囲
に亘つて形成されている。 FIG. 6 shows a different embodiment of the present invention, in which each groove 17e is formed on the outer circumferential side (pressured surface side) of the gripping portion 11e to have a length spanning the entire length of the gripping portion 11e in the axial direction. This works in the same way as the above embodiment. It should be noted that parts that are considered to have the same or equivalent configuration as those of the above-mentioned embodiments are given the same reference numerals as corresponding parts with an alphanumeric letter "e", and redundant explanation will be omitted. (Furthermore, the embodiment shown in the next figure is similarly marked with an alphanumeric f and the redundant explanation is omitted.) Fig. 7 shows another different embodiment of the present application, in which an object to be grasped 10f, such as a gear, is attached. This was implemented on a fixture that grips the inner peripheral surface. A mounting flange 50 is formed in the middle part of the outer periphery of the cylindrical main body 1f, and the main body 1f can be tightened and fixed to a spindle or the like using a mounting bolt inserted into a mounting hole 50a of the mounting flange 50. There is. Main body 1 above
A sleeve 6f is fitted around the outer periphery of one end (right end) of f. This sleeve 6f is tightened to the mounting flange 50 by a tightening nut 8f screwed onto the outer periphery of one end of the main body 1f. A thin gripping portion 11f is formed in the intermediate portion of the sleeve 6f by forming an annular groove 12f on the inner periphery, and the inner peripheral surface of the gripping portion 11f is configured as a pressure receiving surface and the outer peripheral surface as a gripping surface. has been done. This gripping part 11f
has a double-layered structure including an outer layer part 13f, which is exemplified as a first layer part, and an inner layer part 14f, which is exemplified as a second layer part. A groove 17f is formed on the outer peripheral side of the gripping portion 11f over the entire length of the gripping portion 11f in the axial direction.
上記構成のものにあつては、スリーブ６ｆの外
周側にギヤ等の被把持物１０ｆの孔を嵌合させた
後、加圧ねじ２４ｆを締付けて環状空間２１ｆ内
の流体を加圧すると、把持部１１ｆが外周側へ上
記実施例と同様に弾性変形して被把持物１０ｆの
孔内面を把持する。 In the case of the structure described above, after fitting the hole of the object to be gripped 10f such as a gear into the outer circumferential side of the sleeve 6f, the pressure screw 24f is tightened to pressurize the fluid in the annular space 21f. The portion 11f is elastically deformed toward the outer periphery in the same manner as in the above embodiment, and grips the inner surface of the hole of the object to be gripped 10f.
（発明の効果）
以上のように本発明にあつては、被把持物１０
を把持する場合、その被把持物１０をスリーブ６
の把持部１１の把持面側に嵌合した後把持部１１
の被圧面に流体の圧力を加えると、その流体がス
リーブ６の把持部１１を弾性変形させて把持面側
へ変形させ、この把持部１１の把持面で被把持物
１０を締付け把持することができる。(Effects of the Invention) As described above, in the present invention, the grasped object 10
When gripping the object 10, the object 10 is held in the sleeve 6.
The rear gripping portion 11 is fitted onto the gripping surface side of the gripping portion 11 of
When fluid pressure is applied to the pressure-receiving surface of the sleeve 6, the fluid elastically deforms the gripping portion 11 of the sleeve 6 toward the gripping surface, and the gripping surface of the gripping portion 11 tightens and grips the object 10. can.
また被把持物１０の把持を解除する場合には、
被圧面への流体圧力の付与を解除すると、把持部
１１が被圧面側へ自己復帰して把持部１１の把持
面側への膨張が消失し、把持部１１による被把持
物１０の把持を解除することができる。従つて、
把持部１１の被圧面への流体圧力の付与によつて
被把持物１０の把持とその解除とを簡易、迅速に
行うことができる。 Further, when releasing the grip on the object to be gripped 10,
When the application of fluid pressure to the pressured surface is released, the gripping section 11 self-returns to the pressured surface side, the expansion of the gripping section 11 toward the gripping surface side disappears, and the grasping of the gripped object 10 by the gripping section 11 is released. can do. Therefore,
By applying fluid pressure to the pressure-receiving surface of the gripping portion 11, the object to be gripped 10 can be gripped and released easily and quickly.
また上記のように把持部１１の弾性変形によつ
て被把持物１０を把持する場合、把持部１１の被
圧面に流体の圧力を付与すると、スリーブ６の把
持部１１が夫々薄肉となつている二箇所の第１層
部１３の両端部分で把持面側へ大きく膨張し、肉
厚部となる第２層部１４の存在区間に対応する略
中央部分では把持面側への膨張が抑制される。し
かしそこには多数の溝１７がある為、この溝１７
の位置が変形し、その結果把持部１１の略中央部
分が把持部１１の軸線を通る面でみて把持部１１
の軸線と平行な面（第３図に２点鎖線で示す面）
で把持面側へ変形させることができ、これにより
把持部１１の軸線方向の把持面を著しく大きくす
ることのできる特長がある。このことは被把持物
１０をその軸線が把持部１１の軸線と交叉させな
い一致するように把持する可能性を著しく向上さ
せることであり、被把持物の把持精度を高め得る
と共に把持を安定させる上に極めて有益となる。 Further, when gripping the object 10 by elastic deformation of the gripping portion 11 as described above, when fluid pressure is applied to the pressure-receiving surface of the gripping portion 11, the gripping portions 11 of the sleeve 6 each become thin. At both end portions of the first layer portion 13, the two end portions expand significantly toward the gripping surface, and at approximately the center portion corresponding to the area where the second layer portion 14 exists, which is the thick portion, expansion toward the gripping surface side is suppressed. . However, since there are many grooves 17, this groove 17
is deformed, and as a result, the approximately central portion of the gripping portion 11 becomes the gripping portion 11 when viewed from a plane passing through the axis of the gripping portion 11.
A plane parallel to the axis of (the plane shown by the two-dot chain line in Figure 3)
It has the advantage that it can be deformed toward the gripping surface side, thereby significantly increasing the gripping surface of the gripping portion 11 in the axial direction. This significantly improves the possibility of gripping the object 10 so that its axis does not intersect with the axis of the gripping section 11, which increases the accuracy of gripping the object and stabilizes the grip. This will be extremely beneficial.
また上記のように被把持物１０を把持する場
合、把持部１１の被圧面に圧力を加えると、スリ
ーブの把持部１１の中間部にある第２層部１４の
周方向には多数の溝１７が設けてあるので、各溝
１７に対応する第１層部の各部分は把持面側へ大
きく変形し、即ち、把持部１１の把持面９は第４
図に示すように把持部１１の軸線と直角な面でみ
て各溝１７に対応する多数の溝１７の位置で夫々
変形させることができ、これにより第５図からも
推察できるように把持部１１の把持面を被把持物
１０の円周方向の多数箇所で当接させることので
きる特長が生じる。これにより被把持物１０に対
する周方向の接触箇所を多くできて、被把持物１
０の把持力を大幅に増大させることができるよう
になる等、本願発明は、従来例の二つの問題点の
解決を同時にすることができるという産業上の有
用性がある。 Further, when gripping the object 10 as described above, when pressure is applied to the pressure surface of the gripping part 11, a large number of grooves 17 are formed in the circumferential direction of the second layer part 14 in the middle part of the gripping part 11 of the sleeve. are provided, each portion of the first layer portion corresponding to each groove 17 is largely deformed toward the gripping surface side, that is, the gripping surface 9 of the gripping portion 11 is
As shown in the figure, the gripping part 11 can be deformed at the position of a large number of grooves 17 corresponding to each groove 17 when viewed from a plane perpendicular to the axis of the gripping part 11, and as can be inferred from FIG. This has the advantage that the gripping surface can be brought into contact with the object to be gripped 10 at multiple locations in the circumferential direction. As a result, it is possible to increase the number of contact points in the circumferential direction with respect to the object to be grasped 10, and the object to be grasped
The present invention has industrial utility in that it can simultaneously solve two problems of the conventional example, such as being able to significantly increase the zero gripping force.
図面は本願の実施例を示すもので、第１図は流
体圧による把持装置の断面図、第２図は−線
断面図、第３図はスリーブの一例を一部を断面に
して示す側面図、第４図は−線断面図、第５
図は把持時の把持部把持面の変形を示す説明図、
第６図は異なる実施例を示す断面図、第７図は別
の異なる実施例を示す断面図、第８図は従来の流
体圧による把持装置を示す断面図、第９図は従来
装置の把持部把持面の変形を示す説明図。
６……スリーブ、１１……把持部、１３……第
１層部、１４……第２層部、１７……溝。
The drawings show an embodiment of the present application, in which Fig. 1 is a cross-sectional view of a gripping device using fluid pressure, Fig. 2 is a cross-sectional view taken along the - line, and Fig. 3 is a side view showing an example of a sleeve with a portion thereof in cross-section. , Figure 4 is a - line sectional view, Figure 5 is a cross-sectional view taken along the - line.
The figure is an explanatory diagram showing the deformation of the gripping surface of the gripping part during gripping,
FIG. 6 is a sectional view showing a different embodiment, FIG. 7 is a sectional view showing another different embodiment, FIG. 8 is a sectional view showing a conventional gripping device using fluid pressure, and FIG. 9 is a sectional view showing a conventional gripping device. FIG. 6... Sleeve, 11... Gripping part, 13... First layer part, 14... Second layer part, 17... Groove.
Claims (1)
ては、軸線方向の一部に径方向へ弾性変形可能な
筒状の把持部を有すると共にその把持部の両側に
肉厚の剛体から成る強壁部を夫々有し、上記把持
部はその一面を把持面に、その他面を被圧面に
夫々構成し、その被圧面に流体の圧力を付与する
ようにしてある流体圧による把持装置において、
上記筒状の把持部は、その把持部の把持面側に位
置する筒状の第１層部と、その第１層部よりも被
圧面側に位置し、第１層部と重合させてある第２
層部とで構成し、上記第１層部は径方向へ弾性変
形可能な薄肉に形成してあり、上記第２層部は把
持部の軸線方向の略中間位置にあつて軸線方向の
両側に上記第１層部のみの層が形成されるように
短い区間に配置され、かつ第１層部と一体化させ
て径方向には第１層部のみの層よりも厚肉となる
ように形成してあり、さらに第２層部の周方向に
は、軸線方向の溝を多数形成して、把持部が被圧
変形するときには上記軸線と直角な面で見て上記
の第２層部に形成した各溝位置で大きく変形する
ようにしてあることを特徴とする流体圧による把
持装置。1 Equipped with a cylindrical sleeve, the sleeve has a cylindrical grip part that can be elastically deformed in the radial direction in a part of the axial direction, and strong walls made of a thick rigid body on both sides of the grip part. In a fluid pressure gripping device, the gripping portion has one surface as a gripping surface and the other surface as a pressure receiving surface, and is configured to apply fluid pressure to the pressure receiving surface,
The cylindrical gripping portion includes a cylindrical first layer portion located on the gripping surface side of the gripping portion, and a cylindrical first layer portion located on the pressure receiving surface side of the first layer portion and overlapped with the first layer portion. Second
The first layer is formed to have a thin wall that can be elastically deformed in the radial direction, and the second layer is located approximately in the middle of the gripping portion in the axial direction. It is arranged in a short section so that only the first layer is formed, and is formed so that it is integrated with the first layer and is thicker in the radial direction than the layer only for the first layer. Furthermore, a large number of axial grooves are formed in the circumferential direction of the second layer, so that when the grip part is deformed under pressure, grooves are formed in the second layer when viewed from a plane perpendicular to the axis. A gripping device using fluid pressure, characterized in that the gripping device is configured to be largely deformed at each groove position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21223984A JPS6190843A (en) | 1984-10-09 | 1984-10-09 | Chuck device by fluid pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21223984A JPS6190843A (en) | 1984-10-09 | 1984-10-09 | Chuck device by fluid pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6190843A JPS6190843A (en) | 1986-05-09 |
| JPH0248362B2 true JPH0248362B2 (en) | 1990-10-24 |
Family
ID=16619271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21223984A Granted JPS6190843A (en) | 1984-10-09 | 1984-10-09 | Chuck device by fluid pressure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6190843A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0347775Y2 (en) * | 1986-09-08 | 1991-10-11 | ||
| DE202004005321U1 (en) * | 2004-04-03 | 2005-08-11 | Kennametal Inc. | Hydraulic expansion chuck |
| DE102008050213B4 (en) | 2008-10-02 | 2012-04-26 | Kennametal Inc. | Hydraulic chucks |
| US9676040B2 (en) | 2013-04-10 | 2017-06-13 | Daishowa Seiki Kabushiki Kaisha | Hydraulic chuck |
| DE102014108539A1 (en) * | 2014-06-17 | 2015-12-17 | Kennametal Inc. | expansion chucks |
| DE102018214190A1 (en) * | 2018-08-22 | 2020-02-27 | Gühring KG | Hydraulic chucks |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5796705A (en) * | 1980-11-27 | 1982-06-16 | Fuji Seikou Kk | Fluid pressure type holding unit |
| JPS5912507B2 (en) * | 1977-10-27 | 1984-03-23 | 株式会社クボタ | Tractor control floor structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5912507U (en) * | 1982-07-19 | 1984-01-26 | 福久 宣夫 | Rotary tool holding device |
-
1984
- 1984-10-09 JP JP21223984A patent/JPS6190843A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5912507B2 (en) * | 1977-10-27 | 1984-03-23 | 株式会社クボタ | Tractor control floor structure |
| JPS5796705A (en) * | 1980-11-27 | 1982-06-16 | Fuji Seikou Kk | Fluid pressure type holding unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6190843A (en) | 1986-05-09 |
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| EXPY | Cancellation because of completion of term |