JPH04122407U - chuck for tools - Google Patents
chuck for toolsInfo
- Publication number
- JPH04122407U JPH04122407U JP598591U JP598591U JPH04122407U JP H04122407 U JPH04122407 U JP H04122407U JP 598591 U JP598591 U JP 598591U JP 598591 U JP598591 U JP 598591U JP H04122407 U JPH04122407 U JP H04122407U
- Authority
- JP
- Japan
- Prior art keywords
- claw
- screw shaft
- opening
- tool
- tip
- 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.)
- Pending
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 69
- 239000003921 oil Substances 0.000 description 26
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000010730 cutting oil Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Gripping On Spindles (AREA)
Abstract
(57)【要約】
【目的】 爪開閉ねじ軸の傾きを自動的に修正し、工具
の軸芯振れを防止する。
【構成】 先端部に中空軸部2 を有する工具ホルダー3
と、内部にめねじ部4 を備えかつ中空軸部2 内に嵌入固
定された連結スリーブ5 と、めねじ部4 に進退自在に螺
装されかつ先端面28に爪係合溝29を有する爪開閉ねじ軸
6 と、連結スリーブ5 に回転自在に外嵌するとともに先
端部に先細りコーン状部38を形成しかつ該コーン状部38
内面に爪嵌合溝39を設けた爪開閉保持筒12と、前記ねじ
軸6 の爪係合溝29に嵌合され軸方向に摺動して拡縮され
る複数個の工具把持爪13とからなり、前記爪開閉ねじ軸
6 の先端面28を軸線に対して直角な平面としてある。
(57) [Summary] [Purpose] Automatically correct the inclination of the pawl opening/closing screw shaft to prevent tool axis runout. [Configuration] Tool holder 3 with a hollow shaft 2 at the tip
a connecting sleeve 5 which has a female threaded portion 4 therein and is fitted and fixed into the hollow shaft portion 2; and a pawl which is screwed into the female threaded portion 4 so as to be able to move forward and backward and has a pawl engagement groove 29 on the tip surface 28. Opening/closing screw shaft
6 and is rotatably fitted onto the connecting sleeve 5 and has a tapered cone-shaped portion 38 at its tip, and the cone-shaped portion 38
It consists of a claw opening/closing holding cylinder 12 having a claw fitting groove 39 on its inner surface, and a plurality of tool gripping claws 13 which are fitted into the claw engaging groove 29 of the screw shaft 6 and expand and contract by sliding in the axial direction. The claw opening/closing screw shaft
The distal end surface 28 of 6 is a plane perpendicular to the axis.
Description
【0001】0001
本考案は、ドリル、エンドミル等のストレートシャンクを備えた工具を把持す るための工具用チャックに関するものである。 This invention can grip tools with straight shanks such as drills and end mills. This invention relates to a chuck for tools.
【0002】0002
ドリル等の切削工具を工作機械のスピンドルに装着するための工具用チャック のうち、工作機械側の送油路からオイクホール付ドリルに、切削油を供給しうる ようにしたチャックホルダーが知られている(例えば実公平2−26604 号公報参 照) 。 Tool chuck for attaching cutting tools such as drills to the spindle of machine tools Of these, cutting oil can be supplied from the oil supply path on the machine tool side to the drill with an oil hole. A chuck holder is known (for example, see Utility Model Publication No. 2-26604). (See).
【0003】 該ホルダーは、工作機械のスピンドルに取付けられるホルダーシャンクと、該 シャンクの先端の中空軸部外周に相対回転可能に外嵌したホルダーケースと、前 記中空軸部の先端に嵌着したチャック本体とからなり、ホルダーケースに送油路 が形成され、該送油路の一端が工作機械側の固定部材を介して供給油源に接続さ れ、送油路の他端がチャック本体内を経てオイルホール付ドリルに連通されてい る。0003 The holder consists of a holder shank that is attached to the spindle of a machine tool, and a A holder case that is fitted around the outer periphery of the hollow shaft at the tip of the shank so that it can rotate relative to the outside, and a It consists of a chuck body fitted to the tip of the hollow shaft part, and an oil supply path in the holder case. is formed, and one end of the oil feed path is connected to the oil supply source via a fixed member on the machine tool side. The other end of the oil passage is connected to the drill with an oil hole through the chuck body. Ru.
【0004】 前記チャック本体60は、図2に例示するように、工具ホルダーの中空軸部61に 嵌入固定された連結スリーブ62と、該スリーブ62内面先端のめねじ部63に進退自 在に螺装された爪開閉ねじ軸64と、前記スリーブ62の外周にリングナット65によ り回転自在に外嵌された外筒66と、該外筒66の先端部に外嵌固定された爪開閉保 持筒67と、前記爪開閉ねじ軸64の先端の係合溝68および爪開閉保持筒67の先細り コーン内面69に設けた爪嵌合溝70に嵌合された複数個の把持爪71とから成り、爪 開閉ねじ軸64の先端面はコーン状凹面72とされ、該凹面72にオイルホール付ドリ ル73のストレートシャンク部74の端面75が当接するようになっている。そして、 前記爪開閉保持筒67を回転させることによって、把持爪71を介して爪開閉ねじ軸 64が回転すると共に軸線方向に進退し、把持爪72を前記コーン状内面72により拡 縮 (開閉) して、前記シャンク部74を把持し或いは解放するようになっている。0004 The chuck body 60 is attached to the hollow shaft portion 61 of the tool holder, as illustrated in FIG. The connecting sleeve 62 that is fitted and fixed, and the female threaded portion 63 at the inner end of the sleeve 62 can be moved forward and backward. A claw opening/closing screw shaft 64 is screwed into the sleeve 62, and a ring nut 65 is attached to the outer periphery of the sleeve 62. An outer cylinder 66 is rotatably fitted on the outside, and a claw opening/closing retainer is fitted and fixed on the tip of the outer cylinder 66. The holding cylinder 67, the engagement groove 68 at the tip of the pawl opening/closing screw shaft 64, and the tapering of the pawl opening/closing holding cylinder 67. It consists of a plurality of gripping claws 71 fitted into claw fitting grooves 70 provided on the inner surface 69 of the cone. The end surface of the opening/closing screw shaft 64 is a conical concave surface 72, and a drill with an oil hole is formed on the concave surface 72. The end surface 75 of the straight shank portion 74 of the lever 73 is brought into contact with the straight shank portion 74 of the lever 73. and, By rotating the claw opening/closing holding cylinder 67, the claw opening/closing screw shaft is opened via the gripping claw 71. 64 moves forward and backward in the axial direction, and the gripping claws 72 are expanded by the cone-shaped inner surface 72. The shank portion 74 is gripped or released by contracting (opening and closing).
【0005】[0005]
ところで、従来例で説明したチャック本体60の爪開閉ねじ軸64は、進退自在と すべく連結スリーブ62のめねじ部63との間隙を多くしかつ三角形のねじ山として いるため、把持爪71が工具のシャンク部74を真直ぐ (前記中空軸部61の中心軸線 と一致) に把持しても、爪開閉ねじ部64が傾いた状態で前記シャンク部74の端面 75にコーン状凹面72が当接する。しかし、爪開閉ねじ軸64のコーン状凹面72がシ ャンク部74の端面75に押し当てられても、前記ねじ軸64は傾いたまゝで、即ち傾 きが修正されないまゝ前記シャンク部74の端面75を押すことになり、その結果、 前記ドリル73の軸芯線がホルダーシャンク軸芯線と一致せず、軸芯振れを生じ易 いという問題がある。 By the way, the claw opening/closing screw shaft 64 of the chuck main body 60 explained in the conventional example can be moved forward and backward. In order to increase the gap between the connecting sleeve 62 and the female threaded part 63, it should be made into a triangular thread. Therefore, the gripping claw 71 holds the shank part 74 of the tool straight (the central axis of the hollow shaft part 61 Even if it is gripped with A conical concave surface 72 contacts 75. However, the cone-shaped concave surface 72 of the pawl opening/closing screw shaft 64 is Even when pressed against the end face 75 of the trunk portion 74, the screw shaft 64 remains tilted. The end face 75 of the shank portion 74 is pushed without being corrected, and as a result, The axis line of the drill 73 does not match the axis line of the holder shank, which tends to cause axis runout. There is a problem.
【0006】 本考案は、上述のような実状に鑑みてなされたもので、その目的とするところ は、爪開閉ねじ軸の傾きが自動的に修正でき、工具の軸芯振れを防止できる工具 用チャックを提供するにある。[0006] This invention was made in view of the above-mentioned circumstances, and its purpose is to is a tool that can automatically correct the inclination of the claw opening/closing screw shaft and prevent the tool from running out. To provide a chuck for use.
【0007】[0007]
本考案では、上記目的を達成するために、次の技術的手段を講じた。即ち、本 考案は、先端部に中空軸部を有する工具ホルダーと、内部にめねじ部を備えかつ 前記中空軸部内に嵌入固定された連結スリーブと、前記めねじ部に進退自在に螺 装されかつ先端面に爪係合部を有する爪開閉ねじ軸と、前記スリーブに回転自在 に外嵌するとともに先端部内面に先細りコーン状部を形成しかつ該コーン状部に 爪嵌合部を設けた爪開閉保持筒と、前記ねじ軸の爪係合部に係合すると共に前記 保持筒の爪嵌合部に嵌合され軸方向に摺動して拡縮される複数個の工具把持爪と からなり、前記爪開閉ねじ軸の先端面を軸線に対して直角な平面としたことを特 徴としている。 In order to achieve the above object, the present invention takes the following technical measures. That is, books The idea is to have a tool holder with a hollow shaft at the tip and a female thread inside. A connecting sleeve is fitted and fixed into the hollow shaft portion and is screwed into the female thread portion so as to be freely retractable. A claw opening/closing screw shaft having a claw engaging portion on the tip surface, and a rotatable claw shaft attached to the sleeve. At the same time as forming a tapered cone-shaped part on the inner surface of the tip, and forming a tapered cone-shaped part on the inner surface of the tip part, A claw opening/closing holding cylinder provided with a claw engaging portion engages with the claw engaging portion of the screw shaft and A plurality of tool gripping claws that fit into the claw fitting portion of the holding cylinder and expand and contract by sliding in the axial direction. characterized in that the tip surface of the claw opening/closing screw shaft is a plane perpendicular to the axis. It is a sign.
【0008】[0008]
【作用】 本考案によれば、開状態の把持爪13間に工具30のストレートシャンク部31を挿 入して、爪開閉ねじ軸5 の平坦な先端面28に当接させ、爪開閉保持筒12を閉方向 に回転させると、各把持爪13が爪開閉ねじ軸6 をその爪係合部29を介して回転さ せるので、前記ねじ軸6 が先端側に進出し、各把持爪13および工具30を押動して 先端側に押出す。これによって、各把持爪13が半径方向内方に移動して工具30を 真直ぐに把持すると同時に、工具30のシャンク部31端面32が前記ねじ軸6 の先端 面28に圧接しているので、前記ねじ軸6 の傾きが修正され、該ねじ軸6 および工 具30の両端芯が一致する。したがって、工具30の軸芯振れが生じない。なお、工 具30をチャック1 から取外す場合は、爪開閉保持筒12を開方向に回転させること により、爪開閉ねじ軸6 が回転して退入し、各把持爪13が退入すると共に半径方 向外方に移動して開かれる。[Effect] According to the present invention, the straight shank portion 31 of the tool 30 is inserted between the gripping claws 13 in the open state. the claw opening/closing screw shaft 5, and bring it into contact with the flat end surface 28 of the claw opening/closing screw shaft 5, and move the claw opening/closing holding cylinder 12 in the closing direction. When the gripping claws 13 are rotated to The screw shaft 6 advances to the tip side and pushes each gripping claw 13 and tool 30. Extrude toward the tip. This causes each gripping pawl 13 to move radially inward and hold the tool 30. While holding it straight, the end face 32 of the shank part 31 of the tool 30 is aligned with the tip of the screw shaft 6. Since it is in pressure contact with the surface 28, the inclination of the screw shaft 6 is corrected, and the screw shaft 6 and the machining Both ends of the tool 30 are aligned. Therefore, no axial runout of the tool 30 occurs. In addition, the engineering When removing the tool 30 from the chuck 1, rotate the jaw opening/closing holding cylinder 12 in the opening direction. As a result, the pawl opening/closing screw shaft 6 rotates and retracts, and each gripping pawl 13 retracts and moves in the radial direction. It moves outward and opens.
【0009】[0009]
以下、本考案の実施例を図面に基づき説明する。 図1において、工具用チャック1 はオイルホールドリルに適し、先端に中空軸 部2 を有する工具ホルダー3 と、内部にめねじ部4 を備えかつ前記中空軸部2 内 に嵌入固定された連結スリーブ5 と、めねじ部4 に進退自在に螺装された爪開閉 ねじ軸6 と、前記中空軸部2 に軸受7,8 を介して相対回転可能に外嵌されたホル ダーケース9 と、前記スリーブ5 の外周にリングナット10により回転自在でかつ 軸方向移動不能に外装された外筒11と、該外筒11に後端部が外嵌固着された爪開 閉保持筒12および該筒12内に収容した3個の把持爪13とから主構成されている。 Hereinafter, embodiments of the present invention will be described based on the drawings. In Figure 1, tool chuck 1 is suitable for oil hole drills and has a hollow shaft at the tip. A tool holder 3 having a section 2 and a female thread section 4 inside the hollow shaft section 2. The connecting sleeve 5 is fitted into and fixed to the connecting sleeve 5, and the claw opening/closing screw is screwed into the female threaded part 4 so that it can move forward and backward. A screw shaft 6 and a holder fitted onto the hollow shaft portion 2 through bearings 7 and 8 so as to be relatively rotatable. A ring nut 10 is attached to the outer periphery of the case 9 and the sleeve 5 so that the sleeve 5 can be rotated freely and An outer cylinder 11 that is not movable in the axial direction, and a claw opening whose rear end is externally fitted and fixed to the outer cylinder 11. It mainly consists of a closed holding cylinder 12 and three gripping claws 13 housed within the cylinder 12.
【0010】 前記ホルダー3 は、後部が工作機械のスピンドル (図示省略) に嵌入固定され るシャンク部14とされ、前記軸部2 との間に自動工具交換機の把持部15が同心状 に外嵌固定されている。そして、中空軸部2 は、その内面が先拡がりのテーパー 状スリーブ嵌合部16とされ、その外端が拡径されて外筒嵌合部17とされると共に 、油路18が両軸受7,8 の嵌合部間に設けられ、スリーブ嵌合部16の後方にはねじ 栓19が螺着されており、前油路18の前端部側にスリーブ固定用ねじ孔20が前記嵌 合部16内面に貫通するように設けられている。0010 The rear part of the holder 3 is fitted and fixed into the spindle of the machine tool (not shown). A gripping part 15 of the automatic tool changer is concentrically arranged between the shank part 14 and the shaft part 2. It is fixed on the outside. The hollow shaft part 2 has a tapered inner surface that widens at the end. A shaped sleeve fitting part 16 is formed, and its outer end is enlarged in diameter to form an outer cylinder fitting part 17. , an oil passage 18 is provided between the fitting parts of both bearings 7 and 8, and a screw is provided behind the sleeve fitting part 16. A plug 19 is screwed into the sleeve fixing screw hole 20 on the front end side of the front oil passage 18. It is provided so as to penetrate the inner surface of the joint portion 16.
【0011】 前記連結スリーブ5 は、その外面後端部が後端に向って細くなるようスリーブ 嵌合部16に対応してテーパー面21とされ、内面の略前半分はめねじ部4 とされて おり、前記爪開閉ねじ軸6 が進退自在に螺装されている。また、該スリーブ5 の 外周面には、前端部に外筒係止鍔22が突設され、後端部にテーパー状の係止ピン 孔24が前記中空軸部2 のスリーブ固定用ねじ孔20に対応して先端寄りに若干偏心 して設けられており、先端にテーパー状係止ピン25を偏心的に備えた固定ねじ26 により中空軸部2 に固定されるようになっている。なお、前記めねじ部4 は、曲 線ねじ山とされ、これに螺装される爪開閉ねじ軸6 の傾き修正が容易に行われる ようになっている。[0011] The connecting sleeve 5 is arranged so that the rear end of its outer surface becomes narrower toward the rear end. A tapered surface 21 corresponds to the fitting portion 16, and approximately the front half of the inner surface is a female threaded portion 4. The claw opening/closing screw shaft 6 is screwed so that it can move forward and backward. In addition, the sleeve 5 On the outer circumferential surface, an outer cylinder locking collar 22 is protruded at the front end, and a tapered locking pin is installed at the rear end. The hole 24 is slightly eccentric toward the tip in correspondence with the sleeve fixing screw hole 20 of the hollow shaft portion 2. A fixing screw 26 with a tapered locking pin 25 eccentrically provided at the tip. It is fixed to the hollow shaft part 2 by. Note that the female threaded portion 4 is curved. The inclination of the claw opening/closing screw shaft 6 that is screwed into the wire thread can be easily corrected. It looks like this.
【0012】 前記爪開閉ねじ軸6 は中空で、そのねじ部27が曲線ねじ山とされ、これが前記 めねじ部4 に進退自在に螺装された場合の傾きが、容易に修正可能になっており 、先端部は拡径されてその先端面28がねじ軸線に直角な平坦面とされ、T字形の 爪係合溝29が放射方向に夫々等角度で三条設けられ、平坦な先端面28に工具30の ストレートシャンク31の端面32が当接するようになっている。0012 The pawl opening/closing screw shaft 6 is hollow, and its threaded portion 27 is a curved thread, which is The inclination when screwed into the female thread part 4 so that it can move forward and backward can be easily corrected. , the diameter of the tip is expanded so that the tip surface 28 is a flat surface perpendicular to the screw axis, forming a T-shaped Three pawl engagement grooves 29 are provided at equal angles in the radial direction, and the tool 30 is provided on the flat tip surface 28. The end face 32 of the straight shank 31 is brought into contact with it.
【0013】 前記リングナット10は、その外周にねじ部33を有し、前記外筒11の内面後端部 に設けためねじ部34に螺入され、複数のボール35を介して、前記外筒係止鍔22を 挟むように前記スリーブ5 に回転自在で軸方向移動不能に外筒11を外嵌装着して いる。36は外筒11の外周面後端部に外嵌固定したシールリングで、該シールリン グ36は中空軸部2 の外筒嵌合部17に摺接している。また、外筒11の外周面前端縮 径部37には、前記爪開閉保持筒12の後端部が外嵌固定されている。[0013] The ring nut 10 has a threaded portion 33 on its outer periphery, and a rear end portion of the inner surface of the outer cylinder 11. The outer cylinder locking collar 22 is screwed into the internal threaded part 34 provided in the An outer cylinder 11 is fitted around the sleeve 5 so as to be rotatable but immovable in the axial direction. There is. 36 is a seal ring externally fitted and fixed to the rear end of the outer peripheral surface of the outer cylinder 11; The ring 36 is in sliding contact with the outer cylinder fitting part 17 of the hollow shaft part 2. Also, the front end of the outer peripheral surface of the outer cylinder 11 is compressed. The rear end portion of the claw opening/closing holding cylinder 12 is externally fitted and fixed to the diameter portion 37.
【0014】 前記爪開閉保持筒12は、その前半分が先細りコーン状部38とされ、その内面38 a に三条の爪嵌合溝39が設けられ、該各溝39に前記把持爪13が軸方向に摺動自在 に嵌合されている。なお、把持爪13には、夫々後端にT字断面の係合突起40が設 けられ、該係合突起40が前記爪開閉ねじ軸6 の前端の爪係合溝29に半径方向摺動 自在に係合されている。また、爪開閉保持筒12の外周には、開閉ハンドル用切欠 き凹部41が多数設けられている。[0014] The front half of the claw opening/closing holding cylinder 12 has a tapered cone-shaped portion 38, and the inner surface 38 Three pawl fitting grooves 39 are provided in a, and the gripping pawl 13 can freely slide in the axial direction into each groove 39. is mated to. Note that each gripping claw 13 is provided with an engaging protrusion 40 having a T-shaped cross section at the rear end. The engaging protrusion 40 slides radially into the pawl engaging groove 29 at the front end of the pawl opening/closing screw shaft 6. freely engaged. In addition, a notch for the opening/closing handle is provided on the outer periphery of the claw opening/closing holding cylinder 12. A large number of recesses 41 are provided.
【0015】 前記軸受7,8 は、そのリテーナ42, 43が断面十字状を呈し、かつ互いに対向内 方に突出し、その突出筒状部44,45 の各内周面と前記中空軸部2 の外周面との間 に、夫々シールリング46,47 が嵌装され、軸受嵌装用スリーブ48,49 と前記筒状 部44,45 の各外周面との間に、夫々シールリング50,51 が嵌装されている。前記 リテーナ42,43 は、夫々ホルダーケース9 の軸方向中央部内面の前記中空軸部2 に嵌合された内鍔部52によって仕切られている。[0015] The retainers 42 and 43 of the bearings 7 and 8 have cross-shaped cross sections, and are arranged inside facing each other. between the inner circumferential surfaces of the protruding cylindrical portions 44, 45 and the outer circumferential surface of the hollow shaft portion 2. Seal rings 46, 47 are fitted into the bearing fitting sleeves 48, 49 and the cylindrical sleeves 48, 49, respectively. Seal rings 50, 51 are fitted between the outer peripheral surfaces of the parts 44, 45, respectively. Said The retainers 42 and 43 each have the hollow shaft portion 2 on the inner surface of the axially central portion of the holder case 9. It is partitioned off by an inner flange 52 that is fitted into the inner flange 52.
【0016】 前記ホルダーケース9 の内鍔部52の内周面には、中空軸部2 の油路18に対応し て環状溝からなる油路53が設けられ、該油路53に油供給孔54が接続されている。 また、油供給孔54の入口には、油路開閉弁55を備えたケース回り止め部材56が連 結されており、該ケース回り止め部材56が、工作機械のスピンドルを軸支する固 定部材に取付けられた油路連結用アタッチメント (図示省略) に着脱自在に連結 されるようになっている。したがって、ホルダーケース9 は、回転することなく 切削油を工具30のオイルホール57に導く役目をしている。なお、58はボール、59 は軸受カバーである。[0016] The inner circumferential surface of the inner flange portion 52 of the holder case 9 has a groove corresponding to the oil passage 18 of the hollow shaft portion 2. An oil passage 53 consisting of an annular groove is provided, and an oil supply hole 54 is connected to the oil passage 53. Further, a case rotation prevention member 56 equipped with an oil passage opening/closing valve 55 is connected to the entrance of the oil supply hole 54. The case rotation prevention member 56 is connected to a rigid shaft that pivotally supports the spindle of the machine tool. Detachably connected to the oil passage connection attachment (not shown) attached to the fixed member. It is now possible to do so. Therefore, the holder case 9 can be It serves to guide cutting oil to the oil hole 57 of the tool 30. In addition, 58 is a ball, 59 is the bearing cover.
【0017】 上記実施例において、ホルダーケース9 の油供給孔54は、油路53から中空軸部 2 の油路18、連結スリーブ5 および中空の爪開閉ねじ軸6 内を経て、工具30のオ イルホール57に連通され、切削油等が工具30の先端に導きうるようになっており 、ホルダーケース9 は工作機械のスピンドルを軸支する固定部材に拘束されて回 転せず、ホルダー3 が軸受7,8 を介して高速回転する。[0017] In the above embodiment, the oil supply hole 54 of the holder case 9 is connected to the hollow shaft portion from the oil passage 53. 2, the oil passage 18 of the tool 30, the connection sleeve 5 and the hollow claw opening/closing screw shaft 6. It communicates with the oil hole 57 so that cutting oil etc. can be guided to the tip of the tool 30. , the holder case 9 is restrained by a fixed member that pivotally supports the spindle of the machine tool and rotates. The holder 3 rotates at high speed via the bearings 7 and 8.
【0018】 チャック1 に工具30を取付ける場合、先ず、爪開閉保持筒12を右方向に回転さ せると、各把持爪13および爪開閉ねじ軸6 が一体的に回転し、該ねじ軸6 が退入 するため各把持爪13が、爪開閉保持筒12の爪嵌合溝39を案内として軸方向内方に 退入すると同時に各爪13間隔が拡開され、開状態になる。そこで、工具30のスト レートシャンク部31を、各把持爪13間に挿入してその端面32を爪開閉ねじ軸6 の 先端面28に当接させ、爪開閉保持筒12を左方向に回転させると、各把持爪13およ び爪開閉ねじ軸6 が一体的に回転し、前記ねじ軸6 が先端側へと進出すると共に 、各把持爪13を軸方向外方に摺動させてその間隔を狭めて閉じ工具30のシャンク 部31を真直ぐにかつ中空軸部2 の軸芯と同芯的に把持する。このとき、工具30の シャンク部端面32が、前記ねじ軸6 の先端面28に圧接しているので、該ねじ軸6 の傾きが修正され、ねじ軸6 および工具30の両軸芯が一致する。したがって、工 具30の軸芯振れが完全に生じなくなる。なお、工具30をチャック1 から取外す場 合は、爪開閉保持筒12を右方向に回転させることにより、前述のように各把持爪 13が開いて開状態となるので、工具30を抜き出せばよい。[0018] When attaching the tool 30 to the chuck 1, first rotate the jaw opening/closing holding cylinder 12 to the right. When the gripping claws 13 and the claw opening/closing screw shaft 6 are rotated together, the screw shaft 6 is retracted. In order to At the same time as it retracts, the spacing between each claw 13 is widened to become an open state. So, the tool 30 stroke Insert the rate shank part 31 between each gripping claw 13 and insert its end face 32 into the claw opening/closing screw shaft 6. When the claw opening/closing holding cylinder 12 is rotated to the left while touching the tip surface 28, each gripping claw 13 and The claw opening/closing screw shaft 6 rotates integrally, and as the screw shaft 6 advances toward the tip side, , each of the gripping claws 13 is slid axially outward to narrow the gap between them to close the shank of the tool 30. Hold the portion 31 straight and concentrically with the axis of the hollow shaft portion 2. At this time, the tool 30 Since the shank end face 32 is in pressure contact with the tip face 28 of the screw shaft 6, the screw shaft 6 The inclination of is corrected, and the axes of the screw shaft 6 and the tool 30 are aligned. Therefore, The axial runout of the tool 30 is completely eliminated. Note that when removing tool 30 from chuck 1, If so, rotate the claw opening/closing holding cylinder 12 clockwise to open each gripping claw as described above. 13 is opened, and the tool 30 can be pulled out.
【0019】 また、上記実施例によれば、軸受7, 8の各リテーナ42,43 の突出筒状部44, 45 の各内外両周面にシールリング46, 47, 50, 51を取付けてあるので、リテーナ42 , 43と共にシールリング46, 47, 50, 51が中空軸部2 と同じ方向に回転する。即 ち、中空軸部2 が1回転すると、リテーナ42, 43はボール58を介して半回転し、 周速が半減する。したがって、シールリング46, 47, 50, 51の油もれ、摩耗等に よる許容周速まで中空軸部2 即ち工具30の回転数を増大でき、具体的には従来の シール構造のものに比べて2倍にすることができ、工具30の高速回転化を図るこ とができる。[0019] Further, according to the above embodiment, the protruding cylindrical portions 44, 45 of the respective retainers 42, 43 of the bearings 7, 8 Seal rings 46, 47, 50, 51 are installed on both the inner and outer peripheral surfaces of the retainer 42. , 43, the seal rings 46, 47, 50, 51 rotate in the same direction as the hollow shaft portion 2. Immediately When the hollow shaft portion 2 rotates once, the retainers 42 and 43 rotate by half a rotation via the balls 58. Circumferential speed is halved. Therefore, oil leakage, wear, etc. of seal rings 46, 47, 50, 51 are prevented. The rotational speed of the hollow shaft portion 2, that is, the tool 30, can be increased to the allowable circumferential speed due to the It can be doubled compared to those with a seal structure, and allows the tool to rotate at high speed. I can do that.
【0020】 本考案は、上記実施例に限定されるものではなく、例えば、オイルホール付ド リル以外の工具 (オイルホールを備えていない工具を含む) のチャックに採用す ることができる。[0020] The present invention is not limited to the above embodiments, but includes, for example, a door with an oil hole. Used in chucks for tools other than drills (including tools without oil holes). can be done.
【0021】[0021]
本考案は、上述のように、先端部に中空軸部を有する工具ホルダーと、内部に めねじ部を備えかつ前記中空軸部内に嵌入固定された連結スリーブと、前記めね じ部に進退自在に螺装されかつ先端面に爪係合部を有する爪開閉ねじ軸と、前記 スリーブに回転自在に外嵌するとともに先端部内面に先細りコーン状部を形成し かつ該コーン状部に爪嵌合部を設けた爪開閉保持筒と、前記ねじ軸の爪係合部に 係合すると共に前記保持筒の爪嵌合部に嵌合され軸方向に摺動して拡縮される複 数個の工具把持爪とからなり、前記爪開閉ねじ軸の先端面を軸線に対して直角な 平面としたことを特徴とするものであるから、爪開閉ねじ軸の傾きが、精度よく 芯出しされる工具の端面によって自動的に修正され、工具および爪開閉ねじ軸の 両中心軸線が一致し、工具の軸芯振れが防止される。したがって、工具寿命の増 大、加工精度の向上を図ることができる。 As mentioned above, the present invention has a tool holder with a hollow shaft at the tip and a a connecting sleeve having a female threaded portion and fitted and fixed into the hollow shaft portion; a pawl opening/closing screw shaft screwed into the same portion so as to be freely retractable and having a pawl engaging portion on the tip surface; It is rotatably fitted onto the sleeve and a tapered cone-shaped part is formed on the inner surface of the tip. and a claw opening/closing holding cylinder having a claw fitting part on the cone-shaped part, and a claw engaging part of the screw shaft. When engaged, the compound is fitted into the claw fitting portion of the holding cylinder and slid in the axial direction to expand and contract. It consists of several tool gripping claws, and the tip surface of the claw opening/closing screw shaft is perpendicular to the axis. Because it is flat, the inclination of the claw opening/closing screw shaft can be adjusted with high precision. It is automatically corrected by the end face of the tool being centered, and the tool and pawl opening/closing screw shaft are Both center axes are aligned, preventing the tool from running out. Therefore, increased tool life It is possible to improve machining accuracy.
【図1】本考案の実施例を示す一部省略縦断側面図であ
る。FIG. 1 is a partially omitted vertical sectional side view showing an embodiment of the present invention.
【図2】従来例の要部を示す縦断側面図である。FIG. 2 is a longitudinal sectional side view showing main parts of a conventional example.
1 工具用チャック 2 中空軸部 3 ホルダー 4 めねじ部 5 連結スリーブ 6 爪開閉ねじ軸 12 爪開閉保持筒 13 保持爪 28 先端面 29 爪係合溝 (爪係合部) 30 工具 38 コーン状部 39 爪嵌合溝 (爪嵌合部) 1 Tool chuck 2 Hollow shaft part 3 Holder 4 Female thread part 5 Connecting sleeve 6 Claw opening/closing screw shaft 12 Claw opening/closing holding cylinder 13 Holding claw 28 Tip surface 29 Claw engagement groove (claw engagement part) 30 Tools 38 Cone-shaped part 39 Claw fitting groove (claw fitting part)
Claims (1)
と、内部にめねじ部を備えかつ前記中空軸部内に嵌入固
定された連結スリーブと、前記めねじ部に進退自在に螺
装されかつ先端面に爪係合部を有する爪開閉ねじ軸と、
前記スリーブに回転自在に外嵌するとともに先端部内面
に先細りコーン状部を形成しかつ該コーン状部に爪嵌合
部を設けた爪開閉保持筒と、前記ねじ軸の爪係合部に係
合すると共に前記保持筒の爪嵌合部に嵌合され軸方向に
摺動して拡縮される複数個の工具把持爪とからなり、前
記爪開閉ねじ軸の先端面を軸線に対して直角な平面とし
たことを特徴とする工具用チャック。1. A tool holder having a hollow shaft at its tip, a connecting sleeve having a female thread inside and fitted and fixed into the hollow shaft, and a connecting sleeve screwed into the female thread so as to be freely retractable and retractable. a claw opening/closing screw shaft having a claw engaging portion on the tip surface;
A claw opening/closing holding cylinder is rotatably fitted onto the sleeve and has a tapered cone-shaped portion formed on the inner surface of the tip end, and a claw-fitting portion is provided in the cone-shaped portion; It consists of a plurality of tool gripping pawls that are fitted into the pawl fitting portion of the holding cylinder and expand and contract by sliding in the axial direction, and the tip surface of the pawl opening/closing screw shaft is perpendicular to the axis. A tool chuck characterized by its flat surface.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP598591U JPH04122407U (en) | 1991-02-14 | 1991-02-14 | chuck for tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP598591U JPH04122407U (en) | 1991-02-14 | 1991-02-14 | chuck for tools |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04122407U true JPH04122407U (en) | 1992-11-04 |
Family
ID=31898892
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP598591U Pending JPH04122407U (en) | 1991-02-14 | 1991-02-14 | chuck for tools |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04122407U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743901B2 (en) * | 1974-01-16 | 1982-09-17 | ||
JPS5920889U (en) * | 1982-07-28 | 1984-02-08 | 三菱電機株式会社 | Air shower room |
-
1991
- 1991-02-14 JP JP598591U patent/JPH04122407U/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5743901B2 (en) * | 1974-01-16 | 1982-09-17 | ||
JPS5920889U (en) * | 1982-07-28 | 1984-02-08 | 三菱電機株式会社 | Air shower room |
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