JPH0753843Y2 - Chuck - Google Patents
ChuckInfo
- Publication number
- JPH0753843Y2 JPH0753843Y2 JP7003293U JP7003293U JPH0753843Y2 JP H0753843 Y2 JPH0753843 Y2 JP H0753843Y2 JP 7003293 U JP7003293 U JP 7003293U JP 7003293 U JP7003293 U JP 7003293U JP H0753843 Y2 JPH0753843 Y2 JP H0753843Y2
- Authority
- JP
- Japan
- Prior art keywords
- chuck
- cylinder
- tightening
- peripheral surface
- outer peripheral
- 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
Landscapes
- Gripping On Spindles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本考案は、ドリルやエンドミル等
の工具を掴持するためのチャックに関し、特にチャック
本体の先端側に外周面が先細テーパ状のチャック筒を突
設し、チャック筒に先細テーパ状の内周面を有する締付
用回転筒を外嵌し、締付用回転筒とチャック筒との間に
螺旋状に公転する多数のニードルローラを介装したチャ
ックに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chuck for gripping a tool such as a drill or an end mill, and in particular, a chuck cylinder having a tapered outer peripheral surface is provided on the tip side of the chuck body, and The present invention relates to a chuck in which a tightening rotary cylinder having a tapered inner peripheral surface is externally fitted, and a large number of needle rollers that revolve in a spiral shape are interposed between the tightening rotary cylinder and the chuck cylinder.
【０００２】[0002]
【従来の技術】従来のこの種のチャックとしては、例え
ば実公昭４１−２３９８７号公報に開示されているよう
に、チャック本体にチャック筒を一体に突設し、その外
周面に配設されたニードルローラを介して締付用回転筒
を回転せしめることによってチャック筒を収縮及び復元
せしめ、これに嵌合された工具を掴持・開放するように
した構造のものが提案されている。2. Description of the Related Art As a conventional chuck of this type, as disclosed in, for example, Japanese Utility Model Publication No. 41-23987, a chuck cylinder is integrally provided on a chuck body and is provided on the outer peripheral surface thereof. There has been proposed a structure in which a chuck cylinder is contracted and restored by rotating a tightening rotary cylinder via a needle roller, and a tool fitted to the chuck cylinder is gripped and released.
【０００３】[0003]
【考案が解決しようとする課題】ところで、上記構成の
チャックにおいてはチャック筒にニードルローラを介し
て締付用回転筒を回転自在に配設しているので、締付用
回転筒を軽い力で回転操作することによりチャック筒を
強く締め付けて工具を強固に掴持することができるが、
その反面、特に高速回転用のチャックにおいては、その
締付用回転筒に大きな遠心力が作用し、それに急停止、
急加速や振動などの要因が相乗することにより、この締
付用回転筒が緩む恐れがあるという問題があった。By the way, in the chuck having the above-mentioned structure, since the tightening rotary cylinder is rotatably disposed on the chuck cylinder via the needle roller, the tightening rotary cylinder can be operated with a light force. By rotating it, you can firmly tighten the chuck cylinder and firmly grip the tool,
On the other hand, especially in a chuck for high-speed rotation, a large centrifugal force acts on the tightening rotary cylinder, causing a sudden stop,
There is a problem that the tightening rotary cylinder may be loosened due to synergistic factors such as sudden acceleration and vibration.
【０００４】本考案は、上記従来の問題点に鑑み、締付
用回転筒の緩みを確実に防止できるようにしたチャック
を提案することを目的とする。The present invention has been made in view of the above problems of the prior art, and an object thereof is to propose a chuck capable of reliably preventing the tightening rotary cylinder from being loosened.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本考案は、図中の参照符号を付して示すならば、チャ
ック本体１の先端側に外周面４ｂが先細テーパ状のチャ
ック筒４を突設し、チャック筒４に先細テーパ状の内周
面５ａを有する締付用回転筒５を外嵌し、締付用回転筒
５とチャック筒４との間に螺旋状に公転する多数のニー
ドルローラ６を介装したチャックにおいて、締付用回転
筒５の外周面に接触又は近接するとともに軸心方向の圧
縮変形により締付用回転筒５の外周面に圧接する弾性変
形可能な規制部１２を軸心方向の中間に有する回転規制
部材１１の基部１１ａをチャック本体１に取付け、締付
用回転筒５の外周部に回転規制部材１１の先端１１ｂに
対する係合部９を設けてなる構成を採用するものであ
る。In order to achieve the above object, the present invention is directed to a chuck cylinder whose outer peripheral surface 4b is tapered toward the tip side of the chuck body 1 as indicated by the reference numerals in the drawings. 4, the chuck cylinder 4 is externally fitted with the tightening rotary cylinder 5 having the tapered inner peripheral surface 5a, and revolves spirally between the tightening rotary cylinder 5 and the chuck cylinder 4. In a chuck in which a large number of needle rollers 6 are interposed, elastic deformation is possible in which the chuck is in contact with or close to the outer peripheral surface of the tightening rotary cylinder 5 and is pressed against the outer peripheral surface of the tightening rotary cylinder 5 by compression deformation in the axial direction. The base 11a of the rotation restricting member 11 having the restricting portion 12 in the axial center is attached to the chuck body 1, and the engaging portion 9 for the tip 11b of the rotation restricting member 11 is provided on the outer peripheral portion of the tightening rotary cylinder 5. The following configuration is adopted.
【０００６】[0006]
【作用】本考案にあっては、締付用回転筒５を回転して
チャック筒４を締め付ける際に、締付用回転筒５がニー
ドルローラ６にガイドされてチャック筒４の基部側に向
けて軸心方向に移動することにより、締付用回転筒５の
係合部９が回転規制部材１１の先端１１ｂに係合してこ
れを軸心方向に押圧し、この回転規制部材１１の中間の
規制部１２が圧縮変形されて締付用回転筒５の外周面に
圧接するため、締付用回転筒５の不測の緩み回転に対し
て制動が加えられ、締付用回転筒５の緩みを確実に防止
できる。In the present invention, when the tightening rotary cylinder 5 is rotated to tighten the chuck cylinder 4, the tightening rotary cylinder 5 is guided by the needle roller 6 and directed toward the base side of the chuck cylinder 4. By moving in the axial direction, the engaging portion 9 of the tightening rotary cylinder 5 engages with the distal end 11b of the rotation restricting member 11 and presses it in the axial direction, and the middle of the rotation restricting member 11 Since the restricting portion 12 of is compressed and deformed and comes into pressure contact with the outer peripheral surface of the tightening rotary cylinder 5, braking is applied against unexpected loose rotation of the tightening rotary cylinder 5, and the tightening rotary cylinder 5 is loosened. Can be reliably prevented.
【０００７】[0007]
【実施例】以下、本考案のチャックの一実施例につい
て、図１〜図３を参照しながら説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the chuck of the present invention will be described below with reference to FIGS.
【０００８】図１において、チャック本体１はマシニン
グセンタなどの主軸（図示せず）に着脱可能なテーパー
シャンク部２と、その径大側端部に一体的に設けられた
チャック位置決め用のフランジ部３と、フランジ部３か
らこのチャック本体１の先端側に一体的に突設されたチ
ャック筒４とを備えている。チャック筒４は、掴持すべ
き工具のストレートシャンク部（図示せず）に対応する
ストレート状の内周面４ａと、先端に向かって先細テー
パ状の外周面４ｂとを備えている。５はチャック筒４に
外嵌された締付用回転筒で、チャック筒４のテーパ状外
周面４ｂに対応して先細テーパ状に形成された内周面５
ａを備え、この締付用回転筒５とチャック筒４との間
に、チャック筒４の外周面に対して螺旋状に公転する多
数のニードルローラ６・・・が介装されている。ニード
ルローラ６は、リテーナ７に保持されているとともにチ
ャック筒４のテーパ状外周面４ｂの母線に対し、各ロー
ラ６の軸心が適当に傾斜するように配設されており、チ
ャック筒４のテーパ状外周面４ｂに対して自転しつつ螺
旋方向に公転してテーパ状外周面４ｂを乗り上げ動作
し、チャック筒４を弾性的に縮径させ、工具を掴持する
ようになっている。In FIG. 1, a chuck body 1 comprises a taper shank portion 2 which can be attached to and detached from a spindle (not shown) such as a machining center, and a chuck positioning flange portion 3 which is integrally provided at an end portion on the large diameter side. And a chuck cylinder 4 integrally projecting from the flange portion 3 to the tip side of the chuck body 1. The chuck cylinder 4 includes a straight inner peripheral surface 4a corresponding to a straight shank portion (not shown) of a tool to be gripped, and an outer peripheral surface 4b tapered toward the tip. Reference numeral 5 denotes a tightening rotary cylinder that is externally fitted to the chuck cylinder 4, and has an inner peripheral surface 5 that is tapered to correspond to the tapered outer peripheral surface 4b of the chuck cylinder 4.
A plurality of needle rollers 6 ... Revolving spirally with respect to the outer peripheral surface of the chuck cylinder 4 are provided between the tightening rotary cylinder 5 and the chuck cylinder 4. The needle rollers 6 are held by the retainer 7 and are arranged so that the axis of each roller 6 is appropriately inclined with respect to the generatrix of the tapered outer peripheral surface 4 b of the chuck cylinder 4. While rotating around the tapered outer peripheral surface 4b, it revolves in the spiral direction and rides up on the tapered outer peripheral surface 4b to elastically reduce the diameter of the chuck cylinder 4 to grip the tool.
【０００９】チャック筒４には、図２に示すように、チ
ャック筒４の内周面４ａに開口するスリット８ａとこれ
に連続する深孔部８ｂとから成る軸心方向に延びるチャ
ック溝８が周方向に複数列形成され、チャック筒４が弾
性縮径し易いように構成されている。As shown in FIG. 2, the chuck cylinder 4 is provided with a chuck groove 8 extending in the axial direction, which is composed of a slit 8a opening in the inner peripheral surface 4a of the chuck cylinder 4 and a deep hole portion 8b continuous with the slit 8a. A plurality of rows are formed in the circumferential direction, and the chuck cylinder 4 is configured to be easily elastically reduced in diameter.
【００１０】締付用回転筒５の外周面の基端側部分は係
合段部９を介して小径筒部１０に形成され、フランジ部
３のチャック本体１先端側の側面には回転規制部材１１
の基部１１ａが取付けられている。この回転規制部材１
１は鉄、鋼材などの若干弾性変形可能な材料で形成さ
れ、その先端部１１ｂは小径筒部１０の外周面に摺動自
在に外嵌しており、締付用回転筒５がフランジ部３に向
けて移動したときに係合段部９が係合するように構成さ
れている。そして、この回転規制部材１１の基部１１ａ
と先端部１１ｂの間の中間に、小径筒部１０の外周面に
接触又は近接するとともに軸心方向の圧縮変形により締
付用回転筒の外周面に圧接する断面形状略Ｖ字状の弾性
変形可能な規制部１２が設けられている。A proximal end portion of the outer peripheral surface of the tightening rotary cylinder 5 is formed into a small-diameter cylinder portion 10 via an engagement step portion 9, and a rotation regulating member is provided on a side surface of the flange portion 3 on the tip end side of the chuck body 1. 11
Is attached to the base portion 11a. This rotation regulating member 1
1 is made of a material that is slightly elastically deformable, such as iron or steel, and its tip portion 11b is slidably fitted onto the outer peripheral surface of the small-diameter cylindrical portion 10, and the tightening rotary cylinder 5 has a flange portion 3. The engagement step portion 9 is configured to engage when it moves toward. Then, the base portion 11a of the rotation regulating member 11
Elastic deformation with a substantially V-shaped cross section that comes in contact with or close to the outer peripheral surface of the small-diameter cylindrical portion 10 and is pressed against the outer peripheral surface of the tightening rotating cylinder due to compression deformation in the axial direction in the middle between the end portion 11b and the tip portion 11b. A possible regulating part 12 is provided.
【００１１】なお、図１中、１３は締付用回転筒５の基
端部に取付けられたニードルローラ６の抜け止め用のス
トッパリング、１４はチャック筒４の先端に装着された
シール用リング、１５はチャック筒４内に挿入される工
具の内端の位置規制用のストッパである。１６ａ、１６
ｂは回転規制部材１１の基部１１ａと先端部１１ｂの接
合面又は摺動面に配設されたＯリング、１７はシール用
リング１４の外周に配設されたＯリングである。In FIG. 1, 13 is a stopper ring for preventing the needle roller 6 attached to the base end of the tightening rotary cylinder 5 from coming off, and 14 is a sealing ring attached to the tip of the chuck cylinder 4. , 15 are stoppers for regulating the position of the inner end of the tool inserted into the chuck cylinder 4. 16a, 16
Reference numeral b is an O-ring arranged on the joint surface or the sliding surface of the base portion 11a and the tip portion 11b of the rotation restricting member 11, and 17 is an O-ring arranged on the outer periphery of the sealing ring 14.
【００１２】以上の構成によれば、締付用回転筒５を回
転するとニードルローラ６を介して締付用回転筒５がチ
ャック筒４の径大の基端側に向けて軸心方向に移動して
チャック筒４が締め付けられることにより、チャック筒
４内に挿入された工具が掴持される。それと同時に締付
用回転筒５が、図３の（ａ）の状態から上記のようにチ
ャック筒４の基端側に向けて軸心方向に移動することに
より、図３の（ｂ）に示すように、締付用回転筒５の係
合段部９が回転規制部材１１の先端部１１ｂに係合して
これを軸心方向に押圧し、この回転規制部材１１の中間
の規制部１２が軸心方向に圧縮変形される。規制部１２
は断面形状略Ｖ字状であるので軸心方向に圧縮される
と、その内周部が径方向内側に弾性的に突出し、締付用
回転筒５の外周の小径筒部１０に圧接する。その結果、
締付用回転筒５の不測の緩み回転に対して制動が加えら
れることになり、主軸の高速回転により大きな遠心力が
作用している状態で、急停止、急加速や振動などの要因
が相乗したとしても締付用回転筒５の不測の緩みは確実
に防止される。According to the above construction, when the tightening rotary cylinder 5 is rotated, the tightening rotary cylinder 5 moves in the axial direction toward the base end side of the chuck cylinder 4 having the large diameter through the needle roller 6. Then, the chuck cylinder 4 is tightened, so that the tool inserted into the chuck cylinder 4 is gripped. At the same time, the tightening rotary cylinder 5 moves in the axial direction from the state of FIG. 3A toward the base end side of the chuck cylinder 4 as described above, and as shown in FIG. As described above, the engagement step portion 9 of the tightening rotary cylinder 5 engages with the tip end portion 11b of the rotation restricting member 11 and presses it in the axial direction, and the intermediate restricting portion 12 of the rotation restricting member 11 is It is compressed and deformed in the axial direction. Regulatory department 12
Since it has a substantially V-shaped cross-section, when it is compressed in the axial direction, its inner peripheral portion elastically projects radially inward and comes into pressure contact with the small-diameter cylindrical portion 10 on the outer periphery of the tightening rotary cylinder 5. as a result,
Braking is applied to the unexpected loose rotation of the tightening rotary cylinder 5, and factors such as sudden stop, sudden acceleration, and vibration are synergistic in the state where a large centrifugal force is acting on the high-speed rotation of the main shaft. Even in such a case, unexpected loosening of the tightening rotary cylinder 5 is reliably prevented.
【００１３】なお、上記実施例では断面形状略Ｖ字状の
規制部１２を例示したが、規制部１２としては回転規制
部材１１の軸心方向の圧縮によって径方向内側に突出し
て締付用回転筒５の外周面に弾性的に圧接する構成であ
れば、任意の構造を採用できる。Although the restricting portion 12 having a substantially V-shaped cross section is illustrated in the above embodiment, the restricting portion 12 projects radially inward by compression of the rotation restricting member 11 in the axial direction and rotates for tightening. Any structure can be adopted as long as it is elastically pressed against the outer peripheral surface of the cylinder 5.
【００１４】[0014]
【考案の効果】本考案によれば、締付用回転筒の外周面
に接触又は近接するとともに軸心方向の圧縮変形により
締付用回転筒の外周面に圧接する弾性変形可能な規制部
を軸心方向の中間に有する回転規制部材の基部をチャッ
ク本体に取付け、締付用回転筒に回転規制部材の先端に
対する係合部を設けているので、締付用回転筒を回転し
てチャック筒を締め付ける際に、締付用回転筒がチャッ
ク筒の基部側に向けて軸心方向に移動してその係合部が
回転規制部材の先端を軸心方向に押圧することにより、
この回転規制部材の中間の規制部が圧縮変形されて締付
用回転筒の外周面に圧接し、締付用回転筒の不測の緩み
回転に対して制動が加えられるため、締付用回転筒の緩
みを確実に防止できる。According to the present invention, there is provided an elastically deformable restricting portion which comes into contact with or comes close to the outer peripheral surface of the tightening rotary cylinder and is pressed against the outer peripheral surface of the tightening rotary cylinder by compression deformation in the axial direction. Since the base of the rotation restricting member that is in the middle of the axial direction is attached to the chuck body and the tightening rotary cylinder is provided with the engaging portion for the tip of the rotation restricting member, the tightening rotary cylinder is rotated to rotate the chuck cylinder. When tightening, the tightening rotary cylinder moves in the axial direction toward the base side of the chuck cylinder, and the engaging portion presses the tip of the rotation restricting member in the axial direction.
The intermediate regulating portion of the rotation regulating member is compressed and deformed and comes into pressure contact with the outer peripheral surface of the tightening rotary cylinder, and braking is applied against unexpected loose rotation of the tightening rotary cylinder. Can be reliably prevented from loosening.
【図１】本考案の一実施例のチャックの半断面正面図で
ある。FIG. 1 is a front view, in half section, of a chuck according to an embodiment of the present invention.
【図２】図１のＡ−Ａ矢視断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】同実施例の動作状態を示す拡大詳細断面図であ
る。FIG. 3 is an enlarged detailed sectional view showing an operating state of the embodiment.
１ チャック本体 ４ チャック筒 ５ 締付用回転筒 ９ 係合段部 １０ 小径筒部 １１ 回転規制部材 １１ａ 基部 １１ｂ 先端部 １２ 規制部 1 Chuck Main Body 4 Chuck Cylinder 5 Tightening Rotating Cylinder 9 Engagement Step 10 Small Diameter Cylinder 11 Rotation Restricting Member 11a Base 11b Tip 12 Restriction
Claims (1)
ーパ状のチャック筒を突設し、チャック筒に先細テーパ
状の内周面を有する締付用回転筒を外嵌し、締付用回転
筒とチャック筒との間に螺旋状に公転する多数のニード
ルローラを介装したチャックにおいて、締付用回転筒の
外周面に接触又は近接するとともに軸心方向の圧縮変形
により締付用回転筒の外周面に圧接する弾性変形可能な
規制部を軸心方向の中間に有する回転規制部材の基部を
チャック本体に取付け、締付用回転筒の外周部に回転規
制部材の先端に対する係合部を設けたことを特徴とする
チャック。1. A chuck cylinder having a tapered outer peripheral surface protruding from the tip side of the chuck body, and a tightening rotary cylinder having a tapered inner peripheral surface is externally fitted to the chuck cylinder for tightening. In a chuck in which a large number of needle rollers that revolve in a spiral shape are interposed between the rotating cylinder and the chuck cylinder, the tightening rotation comes into contact with or comes close to the outer peripheral surface of the tightening rotation cylinder and the compression deformation in the axial direction causes the tightening rotation. The base of the rotation restricting member, which has an elastically deformable restricting portion in pressure contact with the outer peripheral surface of the cylinder in the middle in the axial direction, is attached to the chuck body, and the engaging portion for the tip of the rotation restricting member is attached to the outer peripheral portion of the tightening rotating cylinder. A chuck provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7003293U JPH0753843Y2 (en) | 1993-12-27 | 1993-12-27 | Chuck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7003293U JPH0753843Y2 (en) | 1993-12-27 | 1993-12-27 | Chuck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0740008U JPH0740008U (en) | 1995-07-18 |
| JPH0753843Y2 true JPH0753843Y2 (en) | 1995-12-13 |
Family
ID=13419856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7003293U Expired - Lifetime JPH0753843Y2 (en) | 1993-12-27 | 1993-12-27 | Chuck |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753843Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5356156B2 (en) * | 2009-08-27 | 2013-12-04 | エヌティーツール株式会社 | Tool holder |
-
1993
- 1993-12-27 JP JP7003293U patent/JPH0753843Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0740008U (en) | 1995-07-18 |
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