JPH0538608A - Chuck - Google Patents

Chuck

Info

Publication number
JPH0538608A
JPH0538608A JP19052391A JP19052391A JPH0538608A JP H0538608 A JPH0538608 A JP H0538608A JP 19052391 A JP19052391 A JP 19052391A JP 19052391 A JP19052391 A JP 19052391A JP H0538608 A JPH0538608 A JP H0538608A
Authority
JP
Japan
Prior art keywords
nut
ring
chuck
shank
claw
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.)
Withdrawn
Application number
JP19052391A
Other languages
Japanese (ja)
Inventor
Hiroshi Takahashi
寛 高橋
Hiroshi Kawakami
洋 河上
Genji Hirata
源治 平田
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co Ltd
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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP19052391A priority Critical patent/JPH0538608A/en
Publication of JPH0538608A publication Critical patent/JPH0538608A/en
Withdrawn legal-status Critical Current

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  • Gripping On Spindles (AREA)

Abstract

PURPOSE:To provide a chuck structured to build in with a solid nut which is effective for part control by eliminating bad influence upon life and precision caused by two-piece cutting of a conventional nut. CONSTITUTION:The top end side of a body 1 is formed smaller than the inside diameter of a nut 7, the nut 7 is constituted and built in without cutting it in two pieces so that it can be srewed in a claw 3, thereafter a press-fit ring 8 with a guide part 10 to guide revolution of the nut 7 is press-installed on the top end of the body 1, a sheet slide member 12 is arranged between the nut 7 and the body 1 so that it is small and light in weight and its movement comes to be smooth and simultaneously, tapered slot 5 forming an engagement part to prevent a shank from idling is drilled on the rear end of a shank bearing part of the body 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はドリル等の刃物のシャン
ク部を把持するチャックの改良に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a chuck for holding a shank portion of a blade such as a drill.

【0002】[0002]

【従来の技術】従来のチャックにおいては、ボディ内に
回動自在に設けられ、ドリル等のシャンク部を把持する
爪を移動させるナットは、通常2つ割りされてボディを
挾み込み、その外側にリング状の部材を圧入して元の円
形のナットに戻している。従って、ナットは必然的に分
割面ができて、その円周面には2個所の傷を有すること
になり、かつ分割によって相応の変形を伴うので、当然
ナットのねじ面の精度も低下する。一方、刃物を着脱す
る際の操作力を軽減するために、ナットとボディ間に、
ボール等の滑動部材を介在させているが、ナットの分割
によって生ずる傷のある面がそのまま滑動面となり、長
期間の使用により摺動に支障をきたし、ナットの2つ割
りによる変形と相俟って、精度的に好ましい構造とはい
えないものであった。
2. Description of the Related Art In a conventional chuck, a nut that is rotatably provided in a body and that moves a pawl that holds a shank portion of a drill or the like is normally split into two parts to sandwich the body and The ring-shaped member is press-fitted into the original circular nut. Therefore, the nut inevitably has a divided surface, and the circumferential surface thereof has two scratches, and since the nut is correspondingly deformed due to the division, the accuracy of the thread surface of the nut is naturally lowered. On the other hand, in order to reduce the operating force when attaching and detaching the blade, between the nut and the body,
Although a sliding member such as a ball is interposed, the scratched surface caused by the division of the nut becomes a sliding surface as it is, and sliding is hindered by long-term use, and this is combined with deformation by splitting the nut in two. Therefore, it cannot be said that the structure is accurate in terms of accuracy.

【0003】[0003]

【発明が解決しようとする課題】従来のチャックにおい
ては、構造上ナットを2つ割りにする必要があり、何ら
かの衝撃力を加えて2分割していた。従ってナットのね
じ面や外径上に変形が生じる。特にキーレスチャック等
の場合はピッチの細かいねじがナットに使われているた
め更に変形が生じ易い傾向にある。またこのナットは内
部で自在に回動するためのガイド面となる構造で、その
表面に生じた2分割面が使用中に障害となり、寿命、精
度維持に悪影響を及ぼす等の問題があった。本発明の目
的は、前記ナットを2つ割りにすることによって生ずる
弊害を除き、部品管理上も有効な一体のまま組込める構
造のチャックを提供することである。
In the conventional chuck, it is necessary to divide the nut into two parts due to the structure, and some kind of impact force is applied to divide the nut into two parts. Therefore, deformation occurs on the thread surface and outer diameter of the nut. Particularly in the case of a keyless chuck or the like, since a screw having a fine pitch is used for the nut, the deformation tends to occur more easily. Further, since this nut has a structure that serves as a guide surface for freely rotating inside, there is a problem in that the two-divided surface formed on the surface becomes an obstacle during use, which adversely affects the life and accuracy maintenance. An object of the present invention is to provide a chuck having a structure capable of being incorporated as a unit, which is effective also in parts management, except for the harmful effects caused by splitting the nut into two.

【0004】[0004]

【課題を解決するための手段】上記目的を達成するた
め、本発明のチャックは、ボディ先端側をナットの内径
より小さく形成し、先端側からナットを爪に螺合できる
よう構成し、しかる後、ボディ先端にナットの回動をガ
イドするガイド部等を有した支持部材を装着して、ナッ
トが適正に回動動作するようセットしたものである。ま
た、ナットとボディ間には、その回動々作がガタがなく
かつ軽快にできるよう板状の滑動部材を配置して小型軽
量化を達成する。更にボディの刃物シャンク受容部の後
端にはシャンクに形成された平面部が係合して滑り空転
を防止するための係合部となるテーパ状長穴が穿設され
ており、締付力が不足の場合でも刃物が空回りしないよ
うにして、特にキーレスチャックの欠点である保持力不
足も確実にカバーできる構造としている。
In order to achieve the above object, the chuck of the present invention is constructed such that the tip side of the body is formed smaller than the inner diameter of the nut so that the nut can be screwed into the claw from the tip side. A supporting member having a guide portion or the like for guiding the rotation of the nut is attached to the tip of the body, and the nut is set to rotate properly. Further, between the nut and the body, a plate-like sliding member is arranged so that the rotation and movement thereof can be performed smoothly and lightly, thereby achieving a reduction in size and weight. Further, a tapered elongated hole is formed at the rear end of the blade shank receiving portion of the body as an engaging portion for engaging a flat surface formed on the shank to prevent slipping and idling. Even if there is a shortage, the blade does not run idle, and it is possible to reliably cover the shortage of holding force, which is a drawback of the keyless chuck.

【0005】[0005]

【作用】上記のように構成したチャックは、爪を移動さ
せるナットが、製作時の精度をそのまま維持されて正確
な締付ができ、高精度のチャックを実現し、また締付動
作に伴って生ずるスラスト荷重を支持する部分には薄形
の低摩擦滑動部材を介在しているので小型化が容易とな
りかつ軽快な締付動作ができる。更に刃物のシャンク受
容部後端に設けたテーバ状長穴は、刃物のシャンク平坦
部と係合して確実に空転防止ができるよう作用する。
In the chuck configured as described above, the nut for moving the claw can maintain the accuracy of manufacture as it is, and can be accurately tightened to realize a high-precision chuck. Since a thin low-friction sliding member is interposed in a portion that supports the generated thrust load, downsizing can be facilitated and a light tightening operation can be performed. Further, the taper-shaped elongated hole provided at the rear end of the shank receiving portion of the blade engages with the flat portion of the shank of the blade so as to surely prevent idling.

【0006】[0006]

【実施例】以下本発明を図示実施例を参照して説明す
る。ボディ1の後端に例えば電気ドリル等の出力スピン
ドルがねじ嵌合される結合部となるねじ部2が設けられ
ており、先端には3個の爪3を保持する傾斜穴4が設け
られている。5はテーパ状長穴部でねじ部2の底部終端
に形成されており、爪3に保持される図示しない刃物の
シャンク部後端の平坦部が係合する。6は締付リングで
内部にナット7が一体的に固着されている。8は支持部
材の圧入リングで、ナット7を、爪3のねじ面9に係合
させた後、ボディ1の先端側から圧入する。10はガイ
ド部で圧入リング8の後端に形成されナット7の内径側
の摺動部11に摺接してナット7の回転動作を保持する
役目を果す。12は薄板状の滑動部材で、ナット7の締
付力を、ボディ1に固着された滑り支持リング13と共
働して軽減しかつ維持する。該滑り支持リング13はボ
ディ1の中間部に固着される。14は保持リングでボデ
ィ1の後端に固着されてボディ1の回動動作を操作する
部位となる。
The present invention will be described below with reference to the illustrated embodiments. At the rear end of the body 1, there is provided a screw portion 2 which serves as a coupling portion into which an output spindle such as an electric drill is screw-fitted, and at the tip thereof, an inclined hole 4 for holding three claws 3 is provided. There is. Reference numeral 5 denotes a tapered elongated hole formed at the bottom end of the threaded portion 2 and engaged with a flat portion of the rear end of the shank portion of the cutter (not shown) held by the claw 3. A tightening ring 6 has a nut 7 integrally fixed therein. Reference numeral 8 is a press-fitting ring of the support member, and the nut 7 is engaged with the threaded surface 9 of the claw 3 and then press-fitted from the tip side of the body 1. Reference numeral 10 denotes a guide portion which is formed at the rear end of the press-fitting ring 8 and is brought into sliding contact with a sliding portion 11 on the inner diameter side of the nut 7 and serves to hold the rotating operation of the nut 7. Reference numeral 12 is a thin plate-like sliding member that reduces and maintains the tightening force of the nut 7 in cooperation with the slide support ring 13 fixed to the body 1. The slide support ring 13 is fixed to the middle portion of the body 1. A holding ring 14 is fixed to the rear end of the body 1 and serves as a portion for operating the rotating operation of the body 1.

【0007】次にその作用と組立手順を説明する。ま
ず、ボディ1にその先端側から滑り支持リング13をほ
ぼ中間部の所定位置に圧装し、ついで保持リング14を
ボディ1の後端に圧着する。滑動部材12はボディ1の
先端から滑り支持リング13のレース面15上に配設
し、爪3を各々ボディ1の傾斜穴4に挿入した後、ボデ
ィ1先端側からナット7を内蔵した締付リング6を、保
持リング14の内径部に回動自在にして挿入し、ナット
7が滑動部材12と密着し、かつ爪3のねじ面9に正し
く螺着させる。しかる後、圧入リング8をボディ1の先
端に圧入する。その場合、圧入リング8のガイド部10
がナット7の摺動部11に内接し、かつ締付リング6が
軽快に回動するよう圧入調整する。このように構成した
本発明のチャックにおいては、締付リング6を回動とす
ることにより、爪3は、ボディ1の傾斜穴4を出入りし
て、半径方向に移動し刃物のシャンク部を把持したり解
放する動作を過宣繰り返し行うことができる。
Next, the operation and the assembling procedure will be described. First, the slide support ring 13 is pressure-fitted to the body 1 from the front end side at a predetermined position in the substantially middle portion, and then the holding ring 14 is pressure-bonded to the rear end of the body 1. The sliding member 12 is arranged on the race surface 15 of the slide support ring 13 from the tip of the body 1, the claws 3 are inserted into the inclined holes 4 of the body 1, and then the nut 7 is tightened from the tip side of the body 1. The ring 6 is rotatably inserted into the inner diameter portion of the holding ring 14, the nut 7 is brought into close contact with the sliding member 12, and the screw surface 9 of the claw 3 is properly screwed. After that, the press-fitting ring 8 is press-fitted into the tip of the body 1. In that case, the guide portion 10 of the press-fitting ring 8
Is inscribed in the sliding portion 11 of the nut 7, and the press-fitting adjustment is performed so that the tightening ring 6 rotates smoothly. In the chuck of the present invention thus configured, by rotating the tightening ring 6, the claw 3 moves in and out of the inclined hole 4 of the body 1 and moves in the radial direction to grip the shank portion of the blade. The actions of releasing and releasing can be repeated.

【0008】上記実施例においては、ボディ先端を支持
するリングを圧入リング8として構成したが、ねじを用
いた螺着リングや止めねじを用いた装着リングとしても
良く、また滑り支持リング13はボディ1と一体に構成
しても良い。
In the above embodiment, the ring for supporting the tip of the body is constructed as the press-fitting ring 8. However, it may be a screwing ring using a screw or a mounting ring using a set screw, and the slide supporting ring 13 is a body. It may be configured integrally with 1.

【0009】[0009]

【発明の効果】以上のように、本発明によれば、刃物の
シャンク部を締付ける作用をするナットを2つ割りする
ことなく製作時の精度をそのまま維持して組込み可能と
したので高精度のチャックが提供できる。また、締付リ
ングの摺動面に薄板状の低摩擦滑動部材を設けたのでそ
の回動動作を軽快かつ小型化が容易に実現できる。更に
シャンク受容部後端にはシャンクの平坦部と係合するテ
ーパ状長穴を穿設しているから、万一締付力が不足した
場合でもその作業中に刃物が空転することがないという
効果も発揮する。
As described above, according to the present invention, since it is possible to assemble the nut without breaking the nut that acts to tighten the shank portion of the blade while maintaining the precision during manufacture, it is possible to achieve high precision. A chuck can be provided. Further, since the thin plate-shaped low-friction sliding member is provided on the sliding surface of the tightening ring, the turning operation thereof can be easily carried out and the miniaturization thereof can be easily realized. Further, since a tapered elongated hole that engages with the flat portion of the shank is formed at the rear end of the shank receiving portion, even if the tightening force is insufficient, the blade will not idle during the work. Also effective.

【図面の簡単な説明】[Brief description of drawings]

【図1】 本発明チャックの一実施例を示す一部断面し
た斜視図である。
FIG. 1 is a partially sectional perspective view showing an embodiment of a chuck of the present invention.

【図2】 図1の右側面図である。FIG. 2 is a right side view of FIG.

【符号の説明】[Explanation of symbols]

1はボディ、2はねじ部(結合部)、3は爪、5はテー
パ状長穴、6は締付リング、7はナット、12は低摩擦
部材(薄板状滑動部材)、14は保持リングである。
1 is a body, 2 is a screw part (coupling part), 3 is a claw, 5 is a tapered elongated hole, 6 is a tightening ring, 7 is a nut, 12 is a low friction member (thin plate-like sliding member), and 14 is a retaining ring. Is.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 動力工具の出力軸に連結される結合部を
有したボディと、該ボディの後端に固着される保持リン
グと、該保持リングに隣接し、前記ボディに回転自在に
装着され、内部に一体的に嵌挿されたナットを備えた締
付リングと、該締付リングの回動により、前記ボディ内
で、径方向及び軸方向に移動して刃物等のシャンク部を
把持する爪とにより構成されるチャックであって、 前記ナットを2分割することなしに前記ボディ外周部に
装着可能に構成したことを特徴とするチャック。
1. A body having a connecting portion connected to an output shaft of a power tool, a holding ring fixed to a rear end of the body, and adjacent to the holding ring and rotatably mounted on the body. , A tightening ring having a nut integrally fitted and inserted therein, and rotation of the tightening ring causes radial and axial movement within the body to grip a shank portion of a blade or the like. A chuck constituted by a claw, wherein the nut can be mounted on the outer peripheral portion of the body without dividing the nut into two.
【請求項2】 前記ナットと前記爪を保持するボディと
の摺動面に締付に伴うスラスト荷重を軽減する低摩擦部
材を介在させたことを特徴とする請求項1記載のチャッ
ク。
2. The chuck according to claim 1, wherein a low friction member for reducing a thrust load due to tightening is interposed on a sliding surface between the nut and the body holding the claw.
【請求項3】 前記ボディの刃物等のシャンク部を収容
する終端部に、前記シャンク部の平坦部を係合支持する
係合面を有するテーパ状長穴を形成したことを特徴とす
る請求項1記載のチャック。
3. A tapered elongated hole having an engaging surface for engaging and supporting a flat portion of the shank portion is formed at a terminal end portion of the body that accommodates a shank portion such as a blade. 1. The chuck according to 1.
JP19052391A 1991-07-31 1991-07-31 Chuck Withdrawn JPH0538608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19052391A JPH0538608A (en) 1991-07-31 1991-07-31 Chuck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19052391A JPH0538608A (en) 1991-07-31 1991-07-31 Chuck

Publications (1)

Publication Number Publication Date
JPH0538608A true JPH0538608A (en) 1993-02-19

Family

ID=16259507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19052391A Withdrawn JPH0538608A (en) 1991-07-31 1991-07-31 Chuck

Country Status (1)

Country Link
JP (1) JPH0538608A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553873A (en) * 1994-07-01 1996-09-10 Power Tool Holders Incorporated Keyless chuck
US6736410B2 (en) 1993-08-13 2004-05-18 Power Tool Holders Incorporated Chuck
US7331584B2 (en) 2004-09-17 2008-02-19 Black & Decker Inc. Chuck with nutating gear reduction
KR101014323B1 (en) * 2009-04-14 2011-02-14 주식회사 텔콘 Optical cable connector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736410B2 (en) 1993-08-13 2004-05-18 Power Tool Holders Incorporated Chuck
US7018146B2 (en) 1993-08-13 2006-03-28 Jacobs Chuck Manufacturing Company Chuck
US7452168B2 (en) 1993-08-13 2008-11-18 Jacobs Chuck Manufacturing Company Chuck
US5553873A (en) * 1994-07-01 1996-09-10 Power Tool Holders Incorporated Keyless chuck
CN1061916C (en) * 1994-07-01 2001-02-14 动力工具霍德尔斯公司 Keyless chuck
EP0768930B1 (en) * 1994-07-01 2002-11-27 POWER TOOL HOLDERS, Inc. Chuck
US7331584B2 (en) 2004-09-17 2008-02-19 Black & Decker Inc. Chuck with nutating gear reduction
KR101014323B1 (en) * 2009-04-14 2011-02-14 주식회사 텔콘 Optical cable connector

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19981008