JPH0212008Y2 - - Google Patents
Info
- Publication number
- JPH0212008Y2 JPH0212008Y2 JP1985008393U JP839385U JPH0212008Y2 JP H0212008 Y2 JPH0212008 Y2 JP H0212008Y2 JP 1985008393 U JP1985008393 U JP 1985008393U JP 839385 U JP839385 U JP 839385U JP H0212008 Y2 JPH0212008 Y2 JP H0212008Y2
- Authority
- JP
- Japan
- Prior art keywords
- chuck
- tube
- cylinder
- inner cylinder
- slit
- 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
Links
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 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
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/117—Retention by friction only, e.g. using springs, resilient sleeves, tapers
Description
【考案の詳細な説明】
本考案は、ドリルやエンドミル等の工具を掴持
するためのチヤツクに関するもので、特に、チヤ
ツク本体の先端側に、チヤツク本体と一体に形成
してあつてスリツトを有する内筒とチヤツク本体
に対し着脱自在に構成してあつて外周面が先細テ
ーパ状をなす外筒との２層からなるチヤツク筒が
突設され、このチヤツク筒に、先細テーパ状の内
周面を有する締付用回転筒が外嵌されると共に、
この締付用回転筒とチヤツク筒との間に、チヤツ
ク筒の外周面に対し螺旋状に公転する多数のニー
ドルローラが介装されたチヤツクに関する。[Detailed description of the invention] The present invention relates to a chuck for gripping tools such as drills and end mills, and in particular has a slit formed integrally with the chuck body on the tip side of the chuck body. A chuck tube is provided with a two-layer protruding structure consisting of an inner tube and an outer tube that is configured to be detachably attached to the chuck body and has a tapered outer circumferential surface. A rotary tightening tube having the following is fitted onto the outside,
This invention relates to a chuck in which a large number of needle rollers are interposed between the tightening rotary cylinder and the chuck cylinder and rotate in a spiral manner with respect to the outer peripheral surface of the chuck cylinder.
この種のチヤツクは、チヤツク筒をスリツト付
き内筒と外筒との２層で構成すると共に外筒をチ
ヤツク本体に対し着脱自在とすることにより、使
用時に損傷が生じ易いチヤツク筒の外周部分たる
外筒のみを脱着交換できるようにしたものである
が、従来この種のチヤツク（例えば特開昭52−
64078号公報）ではそのチヤツク筒の内筒に設け
てある各スリツトがチヤツク筒の先端部において
開放された形状であることから、この内筒のねじ
り剛性が低下して強度的に弱くなり、したがつて
エンドミル等の工具を掴持して切削加工を行つて
いる際に切削負荷によりチヤツク筒が不都合な変
形を生じて工具が滑つて回るといつた問題点があ
つた。 This type of chuck consists of a two-layered chuck tube, an inner tube with slits and an outer tube, and the outer tube is detachable from the chuck body. This type of chuck allows only the outer cylinder to be detached and replaced.
64078), the slits provided in the inner cylinder of the chuck cylinder are open at the tip of the chuck cylinder, so the torsional rigidity of the inner cylinder is reduced and the strength is weakened. However, when cutting is performed while holding a tool such as an end mill, the chuck tube is undesirably deformed due to the cutting load, causing the tool to slip and turn.
本考案は上記に鑑みてなされたもので、チヤツ
ク筒のねじり剛性を高めて強度の向上を図ると共
に充分な工具把持力を具備し且つ耐久性に優れた
チヤツクを提供することを目的としたもので、こ
の目的を達成するための本考案チヤツクは、チヤ
ツク筒４の内筒４ａに、該内筒の先端部４a2と基
端部４a1とを残してこれら両端部間に軸線方向に
縦切されて該内筒の内外に透過するスリツト８が
周方向に複数列配設されていることを特徴とす
る。 The present invention was developed in view of the above, and aims to improve the torsional rigidity of the chuck tube to improve its strength, as well as to provide a chuck with sufficient tool gripping force and excellent durability. To achieve this purpose, the chuck of the present invention has an inner cylinder 4a of the chuck cylinder 4, leaving a distal end 4a 2 and a proximal end 4a 1 of the inner cylinder, and extends the inner cylinder vertically in the axial direction between these two ends. It is characterized in that a plurality of slits 8 are arranged in the circumferential direction so as to pass through the inside and outside of the inner cylinder.
以下本考案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図に例示したチヤツクのチヤツク本体１
は、マシニングセンタなどの主軸ヘツド（図示せ
ず）に着脱可能に装着されるテーパシヤンク部２
と、このテーパシヤンク部２の径大側端部に同心
状に一体連設されたチヤツク位置決め用フランジ
部３と、このフランジ部３から当該チヤツク本体
１の先端側に同心状に突設されたチヤツク筒４と
から構成され、そしてこのチヤツク筒４は内筒４
ａと外筒４ｂとの２層構造からなるもので、内筒
４ａはチヤツク位置決め用フランジ部３から一体
に延出されてチヤツク本体１と一体をなし、外筒
４ｂは、内筒４ａの外周囲に添接するように嵌合
配置されたもので、その基端にフランジ５を有し
てチヤツク本体１のチヤツク位置決め用フランジ
部３にボルト６により着脱自在に取着されてい
る。また上記内筒４ａは掴持すべき工具のストレ
ートシヤンク部（図示せず）が嵌挿されるストレ
ート状の内周面７を有し、そしてこの内筒４ａに
はそれぞれ軸線方向に延びる複数のスリツト８…
が周方向に等間隔で配設されており、各スリツト
８は第１図で明らかなように内筒４ａの先端部４
a2とその基端部４a1とを残してこれら両端部４
a1，４a2間に縦切されて該内筒４ａの内外に半径
方向に透通するものである。更に上記外筒４ｂは
その先端部に向かつて先細テーパ状に形成された
外周面９を備えている。１０はチヤツク筒４の外
筒４ｂに外嵌される締付用回転筒で、外筒４ｂの
テーパ状外周面９に対応するよう先細テーパ状に
形成された内周面１１を有し、この回転筒１０と
チヤツク筒４の外筒４ｂとの間に、外筒４ｂの外
周面９に対し螺旋状に公転する多数のニードルロ
ーラ１２…が介装されている。これらのニードル
ローラ１２…は、リテーナ１３に保持されている
と共に、外筒４ｂのテーパ状外周面９に設定され
る母線に対し各ローラ１２軸心が適当に傾斜する
ように配設されており、しかしてチヤツク筒４に
対して自転しつつ螺旋方向に公転して乗り上げ動
作をすることによりチヤツク筒４を弾性変形させ
て収縮させ、工具を掴持するようになつている。 Chuck body 1 of the chuck illustrated in Fig. 1
is a taper shank portion 2 that is removably attached to a spindle head (not shown) of a machining center, etc.
A chuck positioning flange 3 concentrically connected to the large diameter end of the tapered shank 2, and a chuck concentrically protruding from the flange 3 toward the distal end of the chuck main body 1. This chuck tube 4 is composed of an inner tube 4.
The inner cylinder 4a is integrally extended from the chuck positioning flange 3 to form an integral part with the chuck body 1, and the outer cylinder 4b is formed from the outside of the inner cylinder 4a. It is fitted around the chuck, and has a flange 5 at its base end, and is removably attached to the chuck positioning flange portion 3 of the chuck body 1 with bolts 6. Further, the inner cylinder 4a has a straight inner circumferential surface 7 into which a straight shank portion (not shown) of a tool to be gripped is fitted, and the inner cylinder 4a has a plurality of straight shank portions (not shown) extending in the axial direction. Slits 8...
are arranged at equal intervals in the circumferential direction, and each slit 8 is located at the tip 4 of the inner cylinder 4a, as shown in FIG.
a 2 and its base end 4a 1 , both ends 4
It is vertically cut between a 1 and 4a 2 and penetrates inside and outside of the inner cylinder 4a in the radial direction. Further, the outer cylinder 4b has an outer circumferential surface 9 tapered toward its distal end. Reference numeral 10 denotes a tightening rotary cylinder that is fitted onto the outer cylinder 4b of the chuck cylinder 4, and has an inner peripheral surface 11 formed in a tapered shape to correspond to the tapered outer peripheral surface 9 of the outer cylinder 4b. A large number of needle rollers 12 are interposed between the rotary cylinder 10 and the outer cylinder 4b of the chuck cylinder 4, which revolve in a spiral manner around the outer circumferential surface 9 of the outer cylinder 4b. These needle rollers 12... are held by a retainer 13, and are arranged so that the axial center of each roller 12 is appropriately inclined with respect to a generatrix set on the tapered outer circumferential surface 9 of the outer cylinder 4b. The chuck tube 4 rotates on its axis, revolves in a spiral direction, and rides on the chuck tube 4, thereby causing the chuck tube 4 to elastically deform and contract, thereby gripping the tool.
第１図中１４はチヤツク筒４内に挿入される工
具の内端の位置規制を行うストツパーを示してい
る。 Reference numeral 14 in FIG. 1 indicates a stopper for regulating the position of the inner end of the tool inserted into the chuck tube 4.
上述した構成のチヤツクにおいて、回転筒１０
を締付け方向に回転させてニードルローラ１２…
を介しチヤツク筒４の外筒４ｂ及び内筒４ａを弾
性変形させて縮径させることにより、チヤツク筒
４内に挿入されている工具（図示省略）のストレ
ートシヤンク部をスリツト８…にて周方向に関し
掛合態勢で掴持することができる。 In the chuck having the above-described configuration, the rotary cylinder 10
by rotating the needle roller 12 in the tightening direction...
By elastically deforming and reducing the diameter of the outer cylinder 4b and inner cylinder 4a of the chuck cylinder 4 through the slits 8... It can be grasped in an interlocking position in any direction.
以上説明したように本考案のチヤツクによれ
ば、チヤツク筒の内筒に設けられる各スリツト
が、内筒の先端部とその基端部とを残してこれら
両端部間に縦切されて該内筒の内外に透過する両
端閉塞状のスリツトであつて、従来のチヤツクに
おけるスリツトのようにそのスリツトの内筒先端
部側が開放されていないので、その従来のチヤツ
クに比べ内筒のねじり剛性が高くなつて強度の向
上を図ることができる。しかも上記内筒のスリツ
トを有する領域においては、締付用回転筒を締付
けた際、該内筒の内部に異常な変形を生じること
なくスリツトの幅の縮小によつて無理なく縮径可
能であるから、該内筒に挿入された工具に対して
充分な把持力を作用させることができる。 As explained above, according to the chuck of the present invention, each slit provided in the inner tube of the chuck tube is vertically cut between the two end portions, leaving the tip end and the base end of the inner tube. It is a slit with both ends closed so that it can pass inside and outside the cylinder, and unlike the slit in conventional chucks, the slit is not open at the tip of the inner cylinder, so the torsional rigidity of the inner cylinder is higher than that of conventional chucks. As a result, the strength can be improved. Moreover, in the region of the inner cylinder having the slit, when the rotary tightening cylinder is tightened, the diameter can be easily reduced by reducing the width of the slit without causing any abnormal deformation inside the inner cylinder. Therefore, a sufficient gripping force can be applied to the tool inserted into the inner cylinder.
しかも本考案によれば、上記チヤツク筒の内筒
先端部にはスリツトが形成されておらず、所謂め
くらに形成されているため、この先端部がシール
の作用を発揮し、切削屑等がスリツトに侵入する
のを防止することができ、また当然にスリツトと
ニードルローラとの間には外筒が位置しているた
め切削屑等の侵入を完全に防止してニードルロー
ラの転動を円滑にする効果がある。 Moreover, according to the present invention, the tip of the inner cylinder of the chuck tube is not formed with a slit, but is formed in a so-called blind manner, so that this tip exerts a sealing effect, and cutting chips, etc., are removed from the slit. Naturally, since the outer cylinder is located between the slit and the needle roller, it completely prevents cutting debris from entering and allows the needle roller to roll smoothly. It has the effect of
第１図は本考案に係るチヤツクの一実施例を示
す半縦断面図、第２図は第１図のチヤツクをその
先端側から見た端面図である。
１……チヤツク本体、４……チヤツク筒、４ａ
……内筒、４ｂ……外筒、４a1……内筒の基端
部、４a2……内筒の先端部、８……スリツト、１
０……締付用回転筒、１２……ニードルローラ。
FIG. 1 is a half-longitudinal cross-sectional view showing an embodiment of the chuck according to the present invention, and FIG. 2 is an end view of the chuck shown in FIG. 1, viewed from the distal end side. 1...Chuck body, 4...Chuck tube, 4a
...Inner cylinder, 4b...Outer cylinder, 4a 1 ...Base end of inner cylinder, 4a 2 ...Tip of inner cylinder, 8...Slit, 1
0...Rotary cylinder for tightening, 12...Needle roller.
Claims (1)
に形成してある内筒とチヤツク本体に対し着脱自
在に構成してあつて外周面が先細テーパ状をなす
外筒との２層からなるチヤツク筒が突設され、こ
のチヤツク筒に、先細テーパ状の内周面を有する
締付用回転筒が外嵌されると共に、この締付用回
転筒とチヤツク筒との間に、チヤツク筒の外周面
に対し螺旋状に公転する多数のニードルローラが
介装されたチヤツクにおいて、上記チヤツク筒の
内筒には、該内筒の先端部と基端部とを残してこ
れら両端部間に軸線方向に縦切されて該内筒の内
外を透通するスリツトが周方向に複数列配設され
ていることを特徴とするチヤツク。 On the tip side of the chuck body, there is a chuck tube consisting of two layers: an inner tube that is formed integrally with the chuck body, and an outer tube that is configured to be detachable from the chuck body and whose outer peripheral surface has a tapered shape. A rotary tightening tube having a tapered inner circumferential surface is fitted onto the chuck tube, and a rotary tightening tube is provided on the outer circumferential surface of the chuck tube between the rotary tightening tube and the chuck tube. On the other hand, in a chuck in which a large number of needle rollers that revolve in a spiral are interposed, the inner cylinder of the chuck cylinder has a distal end and a proximal end, and a longitudinal direction extends in the axial direction between these two end parts. A chuck characterized in that a plurality of slits are arranged in a circumferential direction so as to pass through the inner and outer parts of the inner cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985008393U JPH0212008Y2 (en) | 1985-01-24 | 1985-01-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985008393U JPH0212008Y2 (en) | 1985-01-24 | 1985-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61124305U JPS61124305U (en) | 1986-08-05 |
| JPH0212008Y2 true JPH0212008Y2 (en) | 1990-04-04 |
Family
ID=30487632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985008393U Expired JPH0212008Y2 (en) | 1985-01-24 | 1985-01-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0212008Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5264078A (en) * | 1975-11-20 | 1977-05-27 | Toyomoto Hiromitsu | Chuck |
| JPS5622966U (en) * | 1979-07-27 | 1981-02-28 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0144243Y2 (en) * | 1984-12-28 | 1989-12-21 |
-
1985
- 1985-01-24 JP JP1985008393U patent/JPH0212008Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5264078A (en) * | 1975-11-20 | 1977-05-27 | Toyomoto Hiromitsu | Chuck |
| JPS5622966U (en) * | 1979-07-27 | 1981-02-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61124305U (en) | 1986-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1121585A (en) | Keyless chuck | |
| JPH0212008Y2 (en) | ||
| JPH0121690Y2 (en) | ||
| JPH0121689Y2 (en) | ||
| JPH039925Y2 (en) | ||
| JPH039926Y2 (en) | ||
| JPH0333369Y2 (en) | ||
| JPH0121691Y2 (en) | ||
| JPH039927Y2 (en) | ||
| JPH081763Y2 (en) | Chuck | |
| JPH0333368Y2 (en) | ||
| JPH0329053Y2 (en) | ||
| JPS62138522U (en) | ||
| JPH0329052Y2 (en) | ||
| JPH0753843Y2 (en) | Chuck | |
| JPS5852039Y2 (en) | Rotary tool holder | |
| JP3390640B2 (en) | Chuck | |
| JPH0123686Y2 (en) | ||
| JPH0253503A (en) | Chuck | |
| JPS6235751U (en) | ||
| JPS64241Y2 (en) | ||
| JPS605987Y2 (en) | Non-consumable electrode welding torch with wire feeding guide | |
| JPH0329058Y2 (en) | ||
| JPS6189417U (en) | ||
| JPH0214887Y2 (en) |