JPH07314203A - Spindle device - Google Patents

Spindle device

Info

Publication number
JPH07314203A
JPH07314203A JP13671694A JP13671694A JPH07314203A JP H07314203 A JPH07314203 A JP H07314203A JP 13671694 A JP13671694 A JP 13671694A JP 13671694 A JP13671694 A JP 13671694A JP H07314203 A JPH07314203 A JP H07314203A
Authority
JP
Japan
Prior art keywords
rotor
spindle
main shaft
taper
nut
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
Application number
JP13671694A
Other languages
Japanese (ja)
Inventor
Wataru Shinno
亘 新野
Masaru Betto
大 別当
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.)
Makino Milling Machine Co Ltd
Original Assignee
Makino Milling Machine 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 Makino Milling Machine Co Ltd filed Critical Makino Milling Machine Co Ltd
Priority to JP13671694A priority Critical patent/JPH07314203A/en
Publication of JPH07314203A publication Critical patent/JPH07314203A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide a spindle device in which a spindle and a rotor forming a built-in motor can be surely connected together without interposing any sleeve therebetween and they can be disassembled upon maintenance of the device. CONSTITUTION:The outside diameter 7c of a spindle and the inside diameter 29a of a rotor are tapered and the spindle and the rotor are forced to be connected to each other. The large diameter side of the tapered part of the spindle 7 is provided with a thread. The rotor 29 is pushed out of the small diameter side as required through a nut 35 threadedly engaged with the thread, so that the rotor is separated from the spindle 7.

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、ビルトインモータタイ
プの主軸装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a built-in motor type spindle device.

【0002】[0002]

【従来の技術】従来、ビルトインモータにおいては、ロ
ータはスリーブを介しての締付け、若しくは焼嵌めによ
って主軸と締結していた。ロータをスリーブを介して主
軸に締結する例としては、特開平5−292699号公
報に開示のビルトインモータがある。これは、ロータを
スリーブを介して主軸に装着し、スリーブの一端をロー
タから突出させ、そこに楔効果を利用した締付けリング
を外嵌して、締付けリングを締付けてスリーブを主軸に
圧接させ、以ってロータを主軸に締結している。この構
造は、締付けリング付近ではスリーブと主軸とは強固に
締結しているが、締付けリングから離れたスリーブの他
端部では、スリーブと主軸との間のがたが問題となり、
高速回転では振動が発生し、また、スリーブ分だけロー
タ径が大きくなるためイナーシャが大きくなり、モータ
の応答性が悪化し、アンバランスの要因も増加するばか
りでなく、スペース、部品点数も増加する。また、焼嵌
めによる結合では、締結後の分解が困難となる欠点があ
る。
2. Description of the Related Art Conventionally, in a built-in motor, a rotor is fastened to a main shaft by tightening through a sleeve or by shrink fitting. As an example of fastening the rotor to the main shaft via a sleeve, there is a built-in motor disclosed in JP-A-5-292699. This is because the rotor is attached to the main shaft via the sleeve, one end of the sleeve is projected from the rotor, and a tightening ring utilizing the wedge effect is externally fitted to the rotor, and the tightening ring is tightened to press the sleeve against the main shaft. Therefore, the rotor is fastened to the main shaft. In this structure, the sleeve and the main shaft are firmly fastened near the tightening ring, but at the other end of the sleeve away from the tightening ring, rattling between the sleeve and the main shaft becomes a problem.
Vibration occurs at high speed, and the rotor diameter increases by the amount of the sleeve, resulting in increased inertia, which deteriorates motor responsiveness, increases unbalance factors, and increases space and the number of parts. . Further, the coupling by shrink fitting has a drawback that it is difficult to disassemble after fastening.

【0003】[0003]

【発明が解決しようとする課題】上述のように、ロータ
を主軸に取付けるに際し、スリーブを介在させると上述
のような各種の不都合が生ずるので、このようなことの
ないようにするものである。
As described above, when the rotor is attached to the main shaft, if the sleeve is interposed, the above-mentioned various inconveniences occur, and therefore such a problem is avoided.

【0004】よって、本発明の目的は、主軸とロータが
スリーブを介することなく直接的にかつ確実に結合させ
ることができ、しかも、装置の保守に際しロータを主軸
から容易に分解することができるようにした主軸装置を
提供することにある。
Therefore, an object of the present invention is to enable the main shaft and the rotor to be directly and reliably coupled without the interposition of a sleeve, and moreover, the rotor can be easily disassembled from the main shaft during maintenance of the apparatus. It is to provide a spindle device according to the above.

【0005】[0005]

【課題を解決するための手段】本発明は、上記課題を解
決するため、主軸外径とロータ内径をテーパに成形して
両者を直接的に押込み結合するよう構成したもので、詳
しくは下記のように構成されている。
In order to solve the above-mentioned problems, the present invention has a structure in which the outer diameter of the main shaft and the inner diameter of the rotor are formed into a taper, and the both are directly pushed in to be connected. Is configured.

【0006】(1) ビルトインモータを備えた主軸装
置において、主軸のモータ取付部をテーパ状に成形し、
前記モータのロータ内径を前記主軸のテーパに嵌合する
テーパ孔に形成し、前記主軸に前記ロータを直接的に押
込み挿入し、両者を摩擦結合させてなる主軸装置。 (2) 前記摩擦結合されたロータを前記主軸から抜き
取る抜き取り手段を更に具備した上記(1)に記載の主
軸装置。 (3) 前記抜き取り手段は、前記主軸のテーパ大径側
にネジを形成し、これにナットを螺合させてなる上記
(2)に記載の主軸装置。 (4) 前記主軸のテーパ小径側にネジを形成し、これ
にナットを螺合させ、このナットの回転によりロータを
主軸に押し込むよう構成した上記(1)から(3)のい
ずれかに記載の主軸装置。
(1) In a spindle device having a built-in motor, a motor mounting portion of the spindle is formed into a tapered shape,
A spindle device in which a rotor inner diameter of the motor is formed in a tapered hole that fits into a taper of the spindle, the rotor is directly pushed into the spindle, and the rotor is frictionally coupled to each other. (2) The spindle device according to the above (1), further comprising extraction means for extracting the frictionally coupled rotor from the spindle. (3) The spindle device according to (2) above, wherein the extracting means forms a screw on the taper large diameter side of the spindle and a nut is screwed into the screw. (4) The spindle according to any one of (1) to (3) above, wherein a screw is formed on the taper small diameter side of the main shaft, a nut is screwed into the screw, and the rotor is pushed into the main shaft by rotation of the nut. Spindle device.

【0007】[0007]

【作用】本発明によれば、主軸とロータとをテーパを利
用して押込結合させるようにしたため、主軸にロータを
押込んで静合させることにより、スリーブを介在させる
ことなく直接的に両者を一体化させることができる。ま
た、両者を分解するに際しては、主軸のテーパ大径側に
形成したネジに螺合するナットを回転させてロータを小
径側に押出すようにする等のロータ抜き取り手段を設け
ることにより、簡単に分解することができる。更に、主
軸のテーパ小径側に形成したネジに螺合するナットによ
り、ロータを容易に押し込むことができる。
According to the present invention, since the main shaft and the rotor are press-fitted to each other by utilizing the taper, the rotor is pushed into the main shaft to allow the rotor and the rotor to come into static contact with each other, thereby directly integrating the two without interposing a sleeve. Can be transformed. Also, when disassembling the two, it is easy to install a rotor extraction means such as rotating the nut that is screwed into the screw formed on the larger diameter side of the main shaft to push out the rotor to the smaller diameter side. Can be disassembled. Further, the rotor can be easily pushed in by the nut that is screwed into the screw formed on the taper small diameter side of the main shaft.

【0008】[0008]

【実施例】図1は主軸装置全体の構成を示す断面図で、
主軸ハウジング1に軸受3,5で回転可能に軸支された
主軸7先端には、工具9のテーパシャンク9aが嵌合す
るテーパ穴7aが形成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing the overall construction of a spindle device.
A taper hole 7a into which a taper shank 9a of a tool 9 is fitted is formed at the tip of a main shaft 7 rotatably supported by the main shaft housing 1 by bearings 3 and 5.

【0009】主軸7は主軸ハウジング1内にその前後を
それぞれ軸受3,5で支承され、主軸ハウジング1の前
面には軸受押え11、後面には後蓋13が設けられ、主
軸7がこれらを貫通している。さらに、後蓋13には、
これより突出する主軸後端部7bを覆うようにアンクラ
ンプシリンダ15が取付けられており、このアンクラン
プシリンダ15内には、主軸7先端部テーパ穴7aに嵌
合された工具9のテーパシャンク9a先端のプルスタッ
ド9bを把持・開放するコレット17の制御を行う連結
棒19、ドローバー21に移動力を与えるピストン23
が設けられている。なお、符号25はガイドスリーブ、
27は皿バネである。
The main shaft 7 is supported in the main shaft housing 1 by front and rear bearings 3 and 5, respectively, and a bearing retainer 11 is provided on the front surface of the main shaft housing 1 and a rear lid 13 is provided on the rear surface thereof. is doing. Furthermore, the rear lid 13 has
An unclamp cylinder 15 is attached so as to cover the rear end portion 7b of the main shaft projecting therefrom. Inside the unclamp cylinder 15, a taper shank 9a of a tool 9 fitted in a taper hole 7a at the tip end of the main shaft 7 is attached. A piston 23 that gives a moving force to a connecting rod 19 and a draw bar 21 that controls the collet 17 that holds and releases the pull stud 9b at the tip.
Is provided. Reference numeral 25 is a guide sleeve,
27 is a disc spring.

【0010】また、主軸7に形成された嵌合テーパ部7
cには、嵌合テーパ孔29aを形成されているロータ2
9が静合されており、ロータ29に対応して主軸ハウジ
ング1にステータ31が固定されている。そして、この
ロータ29とステータ31とでビルトインモータが構成
されている。
Further, the fitting taper portion 7 formed on the main shaft 7
A rotor 2 having a fitting tapered hole 29a formed in c
9, and a stator 31 is fixed to the spindle housing 1 corresponding to the rotor 29. Then, the rotor 29 and the stator 31 constitute a built-in motor.

【0011】図2は主軸装置全体の断面図を示す図1に
おける主軸7とロータ29との結合構成を示す拡大図
で、主軸7とロータ29の嵌合部分では、主軸7の外径
には1/300〜1/500のテーパ、ロータ29の内
径にも同様のテーパが設けられてあり、ロータ29は主
軸後端部より嵌込まれ、テーパの摩擦力で硬く締結され
るよう構成されている。テーパ部の軸線方向中間は半径
方向に微小量逃げており、実質上テーパの大径側と小径
側の2ヶ所で安定的に締結されている。
FIG. 2 is an enlarged view showing a coupling structure of the main shaft 7 and the rotor 29 in FIG. 1 showing a sectional view of the whole main shaft device. A taper of 1/300 to 1/500 and a similar taper are provided on the inner diameter of the rotor 29. The rotor 29 is fitted from the rear end portion of the main shaft and is firmly fastened by the frictional force of the taper. There is. A small amount of clearance in the axial direction of the taper portion escapes in the radial direction, and the taper is stably fastened at two points on the large diameter side and the small diameter side.

【0012】なお、ロータ29と主軸7との静合に際し
ては、ロータ29の主軸7に対する圧入により行えばよ
いが、図示のように、主軸7にネジを切っておき、これ
にナット33を螺合してロータ29を押し込むようにし
てもよい。また、ロータ29と主軸7との締め代は例え
ば20〜40μ程度とする。主軸7にはロータ29の挿
入先端側が係止する段部7dを設けておき、ここまで押
し込まれた時、適当とする締め代で両者が静合するよう
にしておいてもよい。
The rotor 29 and the main shaft 7 may be fitted into each other by press fitting the rotor 29 into the main shaft 7, but as shown in the drawing, the main shaft 7 is threaded and the nut 33 is screwed into the main shaft 7. Alternatively, the rotor 29 may be pushed in. The tightening margin between the rotor 29 and the main shaft 7 is, for example, about 20 to 40 μ. The main shaft 7 may be provided with a stepped portion 7d with which the insertion tip side of the rotor 29 is locked so that when the rotor 29 is pushed up to this point, the two are allowed to engage with each other with an appropriate tightening margin.

【0013】図3に示すように本発明においては、装置
の保守等に際して、静合されてあるロータ29と主軸7
とを分解できるようにするために、段部7dの主軸先端
側に抜き取り手段としてのナット35が螺合するネジが
設けられてあり、ロータ29と主軸7との結合を解く際
に、ナット35を回してロータ29の端面を結合が解か
れる方向に押出すようにする。このようにすることによ
り、必要に応じてロータ29と主軸7の結合を外すこと
ができる。図3のナット35は、ビルトインモータ組付
け時には主軸7に形成した段部7eに接触固定される。
なお、このナット35は、図2に示すように、主軸ハウ
ジング1と主軸7との間に設けた軸受3の位置決めのた
めに、主軸7に嵌め込まれている間座37の押えナット
と兼用させてもよい。図3のように兼用できない場合
は、ナット35の他に座間37の押えナット36が必要
となる。
As shown in FIG. 3, according to the present invention, the rotor 29 and the main shaft 7 which have been statically coupled with each other are used for maintenance of the apparatus.
In order to disassemble the main shaft 7d, a screw with which a nut 35 as a extracting means is screwed is provided on the tip end side of the main shaft of the step portion 7d, and when the connection between the rotor 29 and the main shaft 7 is released, the nut 35 Is rotated so that the end surface of the rotor 29 is extruded in the direction where the connection is released. By doing so, the rotor 29 and the main shaft 7 can be disconnected from each other as needed. The nut 35 of FIG. 3 is fixed in contact with the step portion 7e formed on the main shaft 7 when the built-in motor is assembled.
It should be noted that, as shown in FIG. 2, this nut 35 is also used as a holding nut of a spacer 37 fitted in the main shaft 7 for positioning the bearing 3 provided between the main shaft housing 1 and the main shaft 7. May be. If it cannot be used as shown in FIG. 3, a holding nut 36 for the seat 37 is required in addition to the nut 35.

【0014】図4は、ロータ29を主軸7から抜き取る
別の態様の抜き取り手段を開示したものである。ロータ
29の外径右端部に溝部29bを形成し、これに引掛け
工具(図示せず)を係合させて右方へ引き抜くようにし
てもよい。
FIG. 4 discloses another form of extracting means for extracting the rotor 29 from the main shaft 7. A groove 29b may be formed on the right end portion of the outer diameter of the rotor 29, and a hooking tool (not shown) may be engaged with the groove 29b to pull it out to the right.

【0015】[0015]

【発明の効果】本発明によれば、ロータ29と主軸7と
を結合するのにスリーブを介在させることなく、ロータ
29を主軸7に直接的に挿入し、双方に形成したテーパ
の静合摩擦力で結合してあるので、ロータとして径が小
さくでき、従って、イナーシャが小さく、モータの応答
性が良く、回転バランスも良好となる。また、結合部分
をテーパに形成して静合としたので、結合が確実に行わ
れ、がたがなく、主軸剛性(曲げ剛性)が向上する。
According to the present invention, the rotor 29 is directly inserted into the main shaft 7 without interposing a sleeve to connect the rotor 29 and the main shaft 7, and the static friction friction of the taper formed on both sides is provided. Since the rotors are connected by force, the diameter of the rotor can be reduced. Therefore, the inertia is small, the responsiveness of the motor is good, and the rotation balance is good. In addition, since the connecting portion is formed in a taper for static engagement, the connection is reliably performed, there is no rattling, and the spindle rigidity (bending rigidity) is improved.

【0016】さらに、装置の保守等に際し、テーパの静
合摩擦力で結合されたロータ29と主軸7とを分解する
場合は、ロータ29の主軸先端側に螺合されてあるナッ
ト35をロータ29を押し出す方向に回転させること等
により構成された抜き取り手段の作用で、テーパの静合
摩擦力に抗して結合を解除する方向に押し出すことがで
きるので、簡単に分解することができる。また、主軸7
のテーパ小径側に形成したネジに螺合したナット33を
ねじ込むことにより容易にロータ29を主軸7に締結で
きる。
Further, when disassembling the rotor 29 and the main shaft 7 which are connected by a taper static friction force at the time of maintenance of the apparatus, etc., the nut 35 screwed to the tip of the main shaft of the rotor 29 is attached to the rotor 29. Can be pushed out in the direction of releasing the coupling against the static frictional force of the taper by the action of the extracting means constituted by rotating in the direction of pushing out. Also, the spindle 7
The rotor 29 can be easily fastened to the main shaft 7 by screwing the nut 33 screwed into the screw formed on the taper small diameter side.

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

【図1】本発明による主軸装置全体の構成を示す断面図
である。
FIG. 1 is a sectional view showing the overall configuration of a spindle device according to the present invention.

【図2】図1におけるロータと主軸との嵌合部分の構成
を示す拡大図である。である。
FIG. 2 is an enlarged view showing a configuration of a fitting portion between a rotor and a main shaft in FIG. Is.

【図3】ロータと主軸との嵌合部分の別の構成を示す拡
大図である。
FIG. 3 is an enlarged view showing another configuration of a fitting portion between a rotor and a spindle.

【図4】ロータの抜き取り手段の別の態様を示す部分拡
大図である。
FIG. 4 is a partially enlarged view showing another aspect of the rotor extracting means.

【符号の説明】[Explanation of symbols]

1 主軸ハウジング 7 主軸 7c 嵌合テーパ部 9 工具 29 ロータ 29a 嵌合テーパ孔 31 ステータ 33 ナット 35 ナット 1 Spindle housing 7 Spindle 7c Fitting taper part 9 Tool 29 Rotor 29a Fitting taper hole 31 Stator 33 Nut 35 Nut

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 ビルトインモータを備えた主軸装置にお
いて、主軸のモータ取付部をテーパ状に成形し、前記モ
ータのロータ内径を前記主軸のテーパに嵌合するテーパ
孔に形成し、前記主軸に前記ロータを直接的に押込み挿
入し、両者を摩擦結合させてなる主軸装置。
1. A spindle device equipped with a built-in motor, wherein a motor mounting portion of the spindle is formed into a taper shape, and a rotor inner diameter of the motor is formed into a taper hole that fits into the taper of the spindle. A spindle device in which the rotor is directly pushed in and inserted, and both are frictionally coupled.
【請求項2】 前記摩擦結合されたロータを前記主軸か
ら抜き取る抜き取り手段を更に具備した請求項1に記載
の主軸装置。
2. The spindle device according to claim 1, further comprising an extracting means for extracting the frictionally coupled rotor from the spindle.
【請求項3】 前記抜き取り手段は、前記主軸のテーパ
大径側にネジを形成し、これにナットを螺合させてなる
請求項2に記載の主軸装置。
3. The spindle device according to claim 2, wherein the extracting means is formed by forming a screw on the taper large diameter side of the spindle and screwing a nut onto the screw.
【請求項4】 前記主軸のテーパ小径側にネジを形成
し、これにナットを螺合させ、このナットの回転により
ロータを主軸に押し込むよう構成した請求項1から3の
いずれか1項に記載の主軸装置。
4. The spindle according to claim 1, wherein a screw is formed on the taper small diameter side of the main shaft, a nut is screwed into the screw, and the rotor is pushed into the main shaft by the rotation of the nut. Spindle device.
JP13671694A 1994-05-27 1994-05-27 Spindle device Pending JPH07314203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13671694A JPH07314203A (en) 1994-05-27 1994-05-27 Spindle device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13671694A JPH07314203A (en) 1994-05-27 1994-05-27 Spindle device

Publications (1)

Publication Number Publication Date
JPH07314203A true JPH07314203A (en) 1995-12-05

Family

ID=15181829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13671694A Pending JPH07314203A (en) 1994-05-27 1994-05-27 Spindle device

Country Status (1)

Country Link
JP (1) JPH07314203A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7690873B2 (en) 2003-03-31 2010-04-06 Nsk Ltd. Main shaft device and machine tool with the same
US20110135416A1 (en) * 2009-12-04 2011-06-09 Precision Drive Systems, LLC Spindle apparatus for receiving and driving a tool holder
JP2012187702A (en) * 2011-02-24 2012-10-04 Nsk Ltd Motor built-in type spindle device
WO2013011815A1 (en) * 2011-07-20 2013-01-24 日本精工株式会社 Main shaft apparatus
JP2013022698A (en) * 2011-07-22 2013-02-04 Nsk Ltd Main spindle device
JP2013022699A (en) * 2011-07-22 2013-02-04 Nsk Ltd Motor built-in type main spindle device
JP2013022700A (en) * 2011-07-22 2013-02-04 Nsk Ltd Motor built-in type main spindle device
JP2013022674A (en) * 2011-07-20 2013-02-04 Nsk Ltd Main spindle device
JP2015127097A (en) * 2015-04-07 2015-07-09 日本精工株式会社 Main spindle device which is motor built-in type
JP2016135541A (en) * 2016-04-08 2016-07-28 日本精工株式会社 Motor built-in spindle device
JP2016163932A (en) * 2016-04-08 2016-09-08 日本精工株式会社 Main spindle device of motor built-in system

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7690873B2 (en) 2003-03-31 2010-04-06 Nsk Ltd. Main shaft device and machine tool with the same
US8052362B2 (en) 2003-03-31 2011-11-08 Nsk, Ltd. Main shaft device and machine tool with the same
US20110135416A1 (en) * 2009-12-04 2011-06-09 Precision Drive Systems, LLC Spindle apparatus for receiving and driving a tool holder
JP2012187702A (en) * 2011-02-24 2012-10-04 Nsk Ltd Motor built-in type spindle device
CN103003014A (en) * 2011-07-20 2013-03-27 日本精工株式会社 Main shaft apparatus
JP2013022674A (en) * 2011-07-20 2013-02-04 Nsk Ltd Main spindle device
WO2013011815A1 (en) * 2011-07-20 2013-01-24 日本精工株式会社 Main shaft apparatus
TWI503201B (en) * 2011-07-20 2015-10-11 Nsk Ltd Spindle device
JP2013022698A (en) * 2011-07-22 2013-02-04 Nsk Ltd Main spindle device
JP2013022699A (en) * 2011-07-22 2013-02-04 Nsk Ltd Motor built-in type main spindle device
JP2013022700A (en) * 2011-07-22 2013-02-04 Nsk Ltd Motor built-in type main spindle device
JP2015127097A (en) * 2015-04-07 2015-07-09 日本精工株式会社 Main spindle device which is motor built-in type
JP2016135541A (en) * 2016-04-08 2016-07-28 日本精工株式会社 Motor built-in spindle device
JP2016163932A (en) * 2016-04-08 2016-09-08 日本精工株式会社 Main spindle device of motor built-in system

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