JP2556893Y2 - Wide range chuck - Google Patents

Wide range chuck

Info

Publication number
JP2556893Y2
JP2556893Y2 JP1990092078U JP9207890U JP2556893Y2 JP 2556893 Y2 JP2556893 Y2 JP 2556893Y2 JP 1990092078 U JP1990092078 U JP 1990092078U JP 9207890 U JP9207890 U JP 9207890U JP 2556893 Y2 JP2556893 Y2 JP 2556893Y2
Authority
JP
Japan
Prior art keywords
chuck
center
chuck body
groove
guide 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.)
Expired - Fee Related
Application number
JP1990092078U
Other languages
Japanese (ja)
Other versions
JPH0451312U (en
Inventor
利明 三枝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okuma Corp
Original Assignee
Okuma Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Okuma Corp filed Critical Okuma Corp
Priority to JP1990092078U priority Critical patent/JP2556893Y2/en
Publication of JPH0451312U publication Critical patent/JPH0451312U/ja
Application granted granted Critical
Publication of JP2556893Y2 publication Critical patent/JP2556893Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【考案の詳細な説明】 産業上の利用分野 本考案は、工作機械に用いる高精度な広範囲形チャッ
クに関するものである。
DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION The present invention relates to a high-precision wide-range chuck used for a machine tool.

従来の技術 従来、工作機械特に研削盤等に用いられる高精度が要
求されるチャックは、殆どダイヤフラムチャックを使用
していた。ダイヤフラムチャックは把持爪の開きが小さ
く、例えば第1図に示すような大径部を奥に貫挿した状
態で小径部を把持する必要があるような工作物の場合
や、把持径がたえず変わるような工作物の場合には使用
できない。このため第5図に示すような流体圧により軸
方向移動するウエッジプランジャ101の傾斜するT溝101
aによりマスタジョー102を開閉する市販のパワーチャッ
クを使用していた。
2. Description of the Related Art Conventionally, most chucks used in machine tools, particularly grinding machines, which require high accuracy have used diaphragm chucks. The diaphragm chuck has a small opening of the gripping claws. For example, as shown in FIG. 1, in the case of a workpiece in which it is necessary to grip a small diameter part with a large diameter part inserted in the back or a grip diameter constantly changes. It cannot be used for such workpieces. Therefore, the inclined T-shaped groove 101 of the wedge plunger 101 which moves axially by the fluid pressure as shown in FIG.
A commercially available power chuck that opens and closes the master jaw 102 with a was used.

考案が解決しようとする課題 従来の技術で述べたパワーチャックは、比較的大きな
把持力と流体圧が中止されたときの安全を考慮したセル
フロック構造を有する一般的な用途に使用されるもの
で、広範囲にわたり高精度に工作物を把持できるチャッ
クではなく、工作物の径が変わる都度把持爪103のセレ
ーションの位置換えとセルフ研削を行わねばならないと
いう問題点を有していた。
Problems to be Solved by the Invention The power chuck described in the prior art is used for general applications having a self-locking structure in consideration of relatively large gripping force and safety when fluid pressure is stopped. However, it is not a chuck capable of gripping a workpiece with high precision over a wide range, but has a problem that the serration of the gripper 103 and self-grinding must be performed each time the diameter of the workpiece changes.

本考案は従来の技術の有するこのような問題点に鑑み
なされたものであり、その目的とするところはその都度
セルフ研削や調整等を行う必要がなく、広範囲な工作物
径を高精度に把持することのできるチャックを提供しよ
うとするものである。
The present invention has been made in view of the above-mentioned problems of the prior art, and it is not necessary to perform self-grinding or adjustment each time, and a wide range of workpiece diameters can be gripped with high precision. The purpose of the present invention is to provide a chuck capable of performing the following.

課題を解決するための手段 上記目的を達成するために本考案の広範囲形チャック
は、チャック本体前面の半径方向等角度の案内溝に沿っ
てそれぞれ移動可能に設けられ後面に前記案内溝と直角
な切欠き溝を中心より等距離になるように有し前面に把
持爪が中心より等距離に固着されるマスタジョーと、前
記チャック本体内の前記案内溝対応位置にチャック中心
より半径方向に等距離かつ前記案内溝と直角に設けられ
た支軸のまわりで旋回可能に枢支され前記切欠き溝にほ
ぼ等長の腕の一方の腕の先端がラインコンタクトにより
係合されるL字形レバーと、前記チャック本体の中心穴
に軸方向移動可能に離れた2位置で軸承せられ前記L字
形レバーの他方の腕がラインコンタクトにより係合され
前進端と後退端を規制するストッパを兼用するそれぞれ
の鍔部で形成する外周溝を有する引張り棒と、該引張り
棒の後端部に嵌着された円板とチャック本体部材間に円
周上等分位置に介挿され前記把持爪が閉じる方向に常時
付勢する複数のばねと、該ばねの力に抗して前記引張り
棒を前進させるチャック開放駆動手段とを含んでなるも
のである。
Means for Solving the Problems In order to achieve the above object, a wide-range chuck according to the present invention is provided movably along radially equiangular guide grooves on the front surface of the chuck body, and is provided on a rear surface thereof at right angles to the guide grooves. A master jaw having a notch groove so as to be equidistant from the center and having a gripping claw fixed to the front surface at an equal distance from the center; and a radially equal distance from the chuck center at a position corresponding to the guide groove in the chuck body. An L-shaped lever pivotally supported about a support shaft provided at a right angle to the guide groove, and an end of one of arms having substantially the same length is engaged with the notch groove by a line contact; The other arm of the L-shaped lever is engaged with the center hole of the chuck body at two positions movably separated in the axial direction, and the other arm of the L-shaped lever is engaged by a line contact and also serves as a stopper for regulating the forward end and the backward end. A tension rod having an outer peripheral groove formed by each flange portion; and a gripping claw inserted at a circumferentially equal position between a disk fitted to the rear end of the tension rod and the chuck body member. Comprises a plurality of springs which are constantly biased in the closing direction, and chuck opening drive means for advancing the drawbar against the force of the springs.

作用 駆動手段によりばねの力に抗して引張り棒を前進さ
せ、各L字形レバーを同時に旋回してマスタジョーを開
き、開かれた把持爪に工作物を挿入する。次いで駆動手
段を後退させると、ばねの力で引張り棒が後退して、L
字形レバーによりマスタージョーを閉じ、把持爪にて工
作物をばねの力で把持する。
Action The pull rod is advanced by the driving means against the force of the spring, the respective L-shaped levers are simultaneously turned to open the master jaw, and the workpiece is inserted into the opened gripper. Next, when the driving means is retracted, the tension bar is retracted by the force of the spring, and L
The master jaw is closed by the L-shaped lever, and the workpiece is gripped by the gripping claws with the force of the spring.

実施例 実施例について第1図〜第4図を参照して説明する。Embodiment An embodiment will be described with reference to FIGS.

工作機械の主軸1の先端に、チャックプレート2を介
してチャック本体3が複数のボルト4により同心に嵌着
されている。チャック本体3の前面3aにはT溝3bが半径
方向等角度に刻設されており、T溝3bに後面5bの中央部
にT溝3bに対して直角の切欠き溝5aがT溝に嵌装したと
き中心より等距離となりうるように刻設されたマスタジ
ョー5がそれぞれ移動可能に嵌挿されている。
A chuck body 3 is concentrically fitted to a tip end of a main shaft 1 of a machine tool via a chuck plate 2 with a plurality of bolts 4. A T-groove 3b is engraved on the front surface 3a of the chuck body 3 at an equal angle in the radial direction, and a notch groove 5a perpendicular to the T-groove 3b is fitted into the T-groove at the center of the rear surface 5b. Master jaws 5 engraved so as to be equidistant from the center when mounted are respectively movably fitted.

チャックプレート2にはT溝3bの対応位置にブラケッ
ト6が一体に形成されており、ブラケット6にT溝3bに
対応する半径方向のすり割溝6aが刻設されている。そし
てこのすり割溝6aにL字形レバー7がT溝と直角に支持
された支軸8により旋削可能に枢支されており、L字形
レバー7のほぼ等長の腕の一方の腕7aの先端が前記切欠
き溝5aにラインコンタクトにより係合されている。
A bracket 6 is formed integrally with the chuck plate 2 at a position corresponding to the T groove 3b, and a radial slot 6a corresponding to the T groove 3b is formed on the bracket 6. An L-shaped lever 7 is pivotally supported in the slit groove 6a by a support shaft 8 supported at right angles to the T-groove, so that the L-shaped lever 7 can be turned. Are engaged with the notched grooves 5a by line contacts.

更にチャックプレート2の左端面にはカラー10が同心
に嵌着されており、カラー10の中心穴と、チャック本体
3の中心穴にブッシュ9を介して引張り棒11が軸方向移
動可能に支持されている。引張り棒11は中央部の鍔部11
bに外周溝11aが刻設されており、鍔部11bの外側端面11
c,11dがストッパとしてチャックプレート2又はチャッ
ク本体3の端面に当接して移動端が規制され、外周溝11
aにL字形レバー7の他方の腕7bの先端がラインコンタ
クトにより係合されている。更に引張り棒11の左端部に
は円板12が嵌着されており、円板12とプレート2の間に
円周上等間隔に設けられた複数のばね13により常時左側
(マスタジョーを閉じる勝手)に付勢され、引張り棒11
は図示しない流体圧アクチュエータによりばね13の力に
抗して右側に押し出されるようになっている。そしてマ
スタジョー5の前面5cに把持爪14が固着されており、チ
ャック本体3の前面3aに位置決めピン15が同心に固着さ
れている。L字形レバー7はチャック中心より腕7a,7b
先端の溝5a,11aとラインコンタクトする点までのそれぞ
れの距離が、チャックの一組毎に等しくなるように同時
加工されており、これにより引張り棒11の軸方向移動で
マスタジョー5が同時に等量移動して把持爪14の工作物
把持部14aが常に同心を保って開閉する。従って工作物
把持部は最初にセルフ研削により同心に形成されたあと
は、工作物径が変わっても再研削する必要がない。
Further, a collar 10 is fitted concentrically on the left end surface of the chuck plate 2, and a pull rod 11 is supported by a center hole of the collar 10 and a center hole of the chuck body 3 via a bush 9 so as to be movable in the axial direction. ing. The pulling rod 11 is the central flange 11
An outer peripheral groove 11a is engraved on the outer end face 11 of the flange 11b.
The moving ends are regulated by contacting the end faces of the chuck plate 2 or the chuck body 3 with the stoppers c and 11d as stoppers.
The tip of the other arm 7b of the L-shaped lever 7 is engaged with a by a line contact. Further, a disc 12 is fitted to the left end of the pull rod 11, and a plurality of springs 13 provided at equal circumferential intervals between the disc 12 and the plate 2 always keep the left side (the master jaw is closed. ) Urged by the drawbar 11
Is pushed rightward by a fluid pressure actuator (not shown) against the force of the spring 13. A gripping claw 14 is fixed to the front face 5c of the master jaw 5, and a positioning pin 15 is concentrically fixed to the front face 3a of the chuck body 3. L-shaped lever 7 has arms 7a and 7b from chuck center
The distances to the point of line contact with the grooves 5a and 11a at the tip are simultaneously machined so that each pair of chucks has the same distance. The workpiece gripping portion 14a of the gripping claw 14 is always opened and closed while being concentric. Therefore, after the workpiece gripper is first formed concentrically by self-grinding, it is not necessary to regrind even if the workpiece diameter changes.

続いて本実施例の作用について説明する。 Next, the operation of the present embodiment will be described.

図示しない流体圧アクチュエータにより、引張り棒11
がばね13の力に抗して右側に押出されると、チャックの
同心円上に枢支点を有し腕の長さが揃った一組のL字形
レバー7が同時に反時計方向に旋回され、マスタジョー
5をT溝3bに沿って移動して把持爪14を開く。次いで工
作物Wを把持部14a内に挿入して、位置決めピン15に先
端を押し当てた状態で、流体圧を切換えて流体圧アクチ
ュエータを後退させると、引張り棒11がばね13の力で引
張り棒11が左側に後退し、把持爪が同時に等量移動して
把持部14aが閉じ工作物Wがチャック中心に対して同心
に把持される。
The tension rod 11 is moved by a fluid pressure actuator (not shown).
Is pushed to the right against the force of the spring 13, a pair of L-shaped levers 7 having a pivot point on the concentric circle of the chuck and having the same arm length are simultaneously turned counterclockwise, and The jaw 5 is moved along the T groove 3b to open the gripping claws 14. Next, when the workpiece W is inserted into the grip portion 14a and the tip is pressed against the positioning pin 15, the fluid pressure is switched and the fluid pressure actuator is retracted, and the tension rod 11 is pulled by the force of the spring 13. 11 retreats to the left, the gripping claws move simultaneously by the same amount, the gripping portion 14a closes, and the workpiece W is gripped concentrically with respect to the center of the chuck.

考案の効果 本考案は、上述のとおり構成されているので、次に記
載する効果を奏する。
Effects of the Invention Since the present invention is configured as described above, the following effects can be obtained.

チャック本体前面の半径方向等角度のT溝に沿ってそ
れぞれ移動可能なマスタジョーを、L字形レバーを介し
てチャック本体中心穴に設けた引張り棒により移動して
把持爪の開閉を行うようにしたので、マスタジョーの移
動量が大きく、しかも把持爪が常にチャック中心に対し
て同心を保って均等に移動でき、径の異なる工作物を高
精度に把持することができる。また大径部を奥に貫挿し
て小径部を把持する必要があるような工作物には特に効
果がある。
The master jaws movable respectively along the T-grooves at the same angle in the radial direction on the front surface of the chuck body are moved by a pull rod provided in the center hole of the chuck body via an L-shaped lever to open and close the gripping claws. Therefore, the moving amount of the master jaw is large, and the gripping claws can always be moved concentrically with respect to the center of the chuck so that the workpieces having different diameters can be gripped with high precision. In addition, the present invention is particularly effective for a workpiece in which the large diameter portion needs to be inserted into the back to grip the small diameter portion.

【図面の簡単な説明】 第1図は本実施例の広範囲形チャックの断面図、第2図
は1/3円をそれぞれA−A線視断面,B−B線視断面,C−
C線視断面で表した第1図の正面の断面図、第3図はT
溝部の側面図、第4図は把持爪の工作物把持部の正面部
分図、第5図は従来のパワーチャックの断面図である。 2……チャックプレート 3……チャック本体、5……マスタジョー 7……L字形レバー、11……引張り棒 13……ばね、14……把持爪
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a wide-range chuck according to the present embodiment, and FIG. 2 is a sectional view taken along line AA, line BB and line C-C of FIG.
FIG. 3 is a front sectional view of FIG.
FIG. 4 is a front partial view of a workpiece gripping portion of a gripping claw, and FIG. 5 is a cross-sectional view of a conventional power chuck. 2 ... Chuck plate 3 ... Chuck body 5 ... Master jaw 7 ... L-shaped lever, 11 ... Tension rod 13 ... Spring, 14 ... Grip claw

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of request for utility model registration] 【請求項1】チャック本体前面の半径方向等角度の案内
溝に沿ってそれぞれ移動可能に設けられ後面に前記案内
溝と直角な切欠き溝を中心より等距離になるように有し
前面に把持爪が中心より等距離に固着されるマスタジョ
ーと、前記チャック本体内の前記案内溝対応位置にチャ
ック中心より半径方向に等距離かつ前記案内溝と直角に
設けられた支軸のまわりで旋回可能に枢支され前記切欠
き溝にほぼ等長の腕の一方の腕の先端がラインコンタク
トにより係合されるL字形レバーと、前記チャック本体
の中心穴に軸方向移動可能に離れた2位置で軸承せられ
前記L字形レバーの他方の腕がラインコンタクトにより
係合され前進端と後退端を規制するストッパを兼用する
それぞれの鍔部で形成する外周溝を有する引張り棒と、
該引張り棒の後端部に嵌着された円板とチャック本体部
材間に円周上等分位置に介挿され前記把持爪が閉じる方
向に常時付勢する複数のばねと、該ばねの力に抗して前
記引張り棒を前進させるチャック開放駆動手段とを含ん
でなる広範囲形チャック。
1. A notch groove which is provided movably along a guide groove at an equal angle in a radial direction of a front surface of a chuck body and is provided at a rear surface thereof so as to be equidistant from the center with respect to the guide groove, and is gripped at a front surface. A master jaw in which the pawl is fixed at an equal distance from the center; and a pivot that is rotatable around a spindle provided at a position corresponding to the guide groove in the chuck body in a radial direction equidistant from the chuck center and perpendicular to the guide groove. An L-shaped lever pivotally supported by the notch groove and having the tip of one arm of substantially equal length engaged by a line contact; and two positions movably axially separated from a center hole of the chuck body. A pull rod having an outer peripheral groove formed by each flange portion which is supported by a shaft, and the other arm of the L-shaped lever is engaged by a line contact and also serves as a stopper which regulates a forward end and a backward end;
A plurality of springs interposed between the disk fitted to the rear end of the pulling rod and the chuck body at equal circumferential positions and constantly biasing the gripping claws in a closing direction; and a force of the springs. And a chuck opening driving means for advancing the drawbar against the tension bar.
JP1990092078U 1990-08-31 1990-08-31 Wide range chuck Expired - Fee Related JP2556893Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990092078U JP2556893Y2 (en) 1990-08-31 1990-08-31 Wide range chuck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990092078U JP2556893Y2 (en) 1990-08-31 1990-08-31 Wide range chuck

Publications (2)

Publication Number Publication Date
JPH0451312U JPH0451312U (en) 1992-04-30
JP2556893Y2 true JP2556893Y2 (en) 1997-12-08

Family

ID=31828267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990092078U Expired - Fee Related JP2556893Y2 (en) 1990-08-31 1990-08-31 Wide range chuck

Country Status (1)

Country Link
JP (1) JP2556893Y2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6353063A (en) * 1986-08-25 1988-03-07 Hitachi Ltd Transparent sheet printing system in thermal transfer printer

Also Published As

Publication number Publication date
JPH0451312U (en) 1992-04-30

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