JPS6244044A - Main shaft drive motor - Google Patents

Main shaft drive motor

Info

Publication number
JPS6244044A
JPS6244044A JP60182910A JP18291085A JPS6244044A JP S6244044 A JPS6244044 A JP S6244044A JP 60182910 A JP60182910 A JP 60182910A JP 18291085 A JP18291085 A JP 18291085A JP S6244044 A JPS6244044 A JP S6244044A
Authority
JP
Japan
Prior art keywords
air
housing
rotor
main shaft
stator
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.)
Granted
Application number
JP60182910A
Other languages
Japanese (ja)
Other versions
JPH0510021B2 (en
Inventor
Kazuhiko Sugita
和彦 杉田
Kazuhisa Sugiyama
和久 杉山
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.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
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 Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP60182910A priority Critical patent/JPS6244044A/en
Publication of JPS6244044A publication Critical patent/JPS6244044A/en
Publication of JPH0510021B2 publication Critical patent/JPH0510021B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

PURPOSE:To prevent the thermal effect due to the generation of heat by a motor by providing an air supply port to supply the air into the housing at the end cap of the housing and by providing spiral grooves in the taper sleeve for air passage. CONSTITUTION:The air supplied into a housing 5 from an air supply port 14 passes through the clearance 16 between a rotor 2 and a stator 4. It passes as well through the spiral grooves 15 and 15a of a taper sleeve 3, by which the heat from the rotor 2 and the stator 4 is cooled in heat exchange and discharged to the outer air through the motor power line outlet hole 17. Thus the outside circumference of the stator 4 is cooled by the conventional cooling oil and the inside circumference thereof by the air, while the outside and inside circumference of the rotor 2 can be cooled by the air.

Description

【発明の詳細な説明】 〈産業上の利用分野) 本発明は、主軸の後端部にロータ並びにステータを設け
た主軸駆動モータに関するものである。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a main shaft drive motor in which a rotor and a stator are provided at the rear end of the main shaft.

〈従来の技術〉 工作物を鏡面加工する超精密加工機においては主軸の回
転伝達系の振動伝播を防止することと、高速回転が要求
されることなどで、主軸の後端部に直接モータを構成し
ている。これをビルトインモータと称している。その構
成は第4図で示すように、主軸1の後端部のテーバ外径
1aにテーパスリーブ3を介してロータ2を締結し、こ
のロータ2に対応するステータ4はハウジング5に固定
した構造である。このビルトインモータにより、要求さ
れる精度が確保されているが、モータ部からの発熱によ
る熱影響が問題である。これを解決するために、ハウジ
ング5にスパイラル溝7を設け、このスノ(イラル溝7
に冷却油を流して冷却を図っている。尚、6はハウジン
グのエンドキャップ、8はカッ(−ヲ示す。
<Conventional technology> In ultra-precision processing machines that mirror-finish workpieces, it is necessary to prevent vibration propagation in the rotation transmission system of the spindle and to rotate at high speed, so it is necessary to install a motor directly at the rear end of the spindle. It consists of This is called a built-in motor. As shown in FIG. 4, the structure is such that a rotor 2 is fastened to the outer diameter 1a of the taper at the rear end of the main shaft 1 via a tapered sleeve 3, and a stator 4 corresponding to the rotor 2 is fixed to a housing 5. It is. This built-in motor ensures the required accuracy, but there is a problem with the thermal effects caused by heat generated from the motor section. In order to solve this problem, a spiral groove 7 is provided in the housing 5, and the spiral groove 7 is provided in the housing 5.
Cooling oil is poured into the tank to cool it down. In addition, 6 is an end cap of the housing, and 8 is a bracket (-).

〈発明が解決しようとする問題点〉 上記従来の冷却構造ではステータを伝ってくる熱を冷却
するだけで、ロータ側の発熱に対してはほとんど効果が
ない。
<Problems to be Solved by the Invention> The conventional cooling structure described above only cools the heat transmitted through the stator, and has little effect on heat generation on the rotor side.

熱影響の問題に対処するために、主軸をセラミックス等
の低熱膨張材が用いられている。しかし、ロータを締結
するテーパスリープはスチール等であり主軸との熱膨張
率が異なるために、テーパスリーブが熱膨張するとガタ
が生じて振動するおそれがある。
To deal with the problem of thermal effects, low thermal expansion materials such as ceramics are used for the main shaft. However, the taper sleeve that fastens the rotor is made of steel or the like and has a different coefficient of thermal expansion from the main shaft. Therefore, when the taper sleeve expands thermally, there is a risk that play may occur and vibrations may occur.

く問題点を解決するための手段) 本発明は、上記従来の問題点を解決するために、主軸の
後端部のテーパ外径にチーバスIJ−プを介してロータ
を嵌着し、このロータと対応するステータを7・ウジン
グに固定した主軸駆動モータにおいて、ハウジングのエ
ンドキャップにハウジング内にエアを供給するエア供給
口を設け、前記テーパスリーブにエア通路となるスパイ
ラル溝を設けたものである。
In order to solve the above-mentioned conventional problems, the present invention provides a rotor that is fitted onto the tapered outer diameter of the rear end of the main shaft via a Chibus IJ-pull. In a main shaft drive motor in which a corresponding stator is fixed to a housing, an air supply port for supplying air into the housing is provided in the end cap of the housing, and a spiral groove serving as an air passage is provided in the tapered sleeve. .

く作 用) 本発明は、ハウジング内に供給されたエアは、ステータ
とロータとの隙間並びにテーパスリーブに設けたスパイ
ラル溝を通って熱交換し、ロータ側を冷却してハウジン
グ外に放出される。
In the present invention, the air supplied into the housing exchanges heat through the gap between the stator and rotor as well as through the spiral groove provided in the tapered sleeve, cools the rotor side, and is released outside the housing. .

〈実施例) 以下本発明の実施例を第1図乃至第3図に基づいて説明
する。第1図において、10は主軸台、1は主軸であり
、前記主軸台10に静圧ラジアル軸受11並びに静圧ス
ラスト軸受12によりて回転自在に軸承されている。前
記主軸1の後端部には、主軸1をダイレクトに回転駆動
するモータ、すなわち、ビルトインモータMが設けられ
ている。このビルトインモータMは従来と同様に第2図
で示すように、主軸1の後端部のテーパ外径1aにテー
パスリーブ3を介して ロータ2が締結され、ロータ2
に対応するステータ4はハウシング5に固定されている
。また、ハウジング5には冷却油の通路であるスパイラ
ル溝7が形成されている。
<Embodiments> Examples of the present invention will be described below with reference to FIGS. 1 to 3. In FIG. 1, 10 is a headstock, and 1 is a main shaft, which is rotatably supported on the headstock 10 by a hydrostatic radial bearing 11 and a hydrostatic thrust bearing 12. A motor for directly rotating the main shaft 1, that is, a built-in motor M is provided at the rear end of the main shaft 1. As shown in FIG. 2, this built-in motor M has a rotor 2 fastened to the tapered outer diameter 1a of the rear end of the main shaft 1 via a tapered sleeve 3, as in the conventional case.
A stator 4 corresponding to the stator 4 is fixed to the housing 5. Furthermore, a spiral groove 7 is formed in the housing 5 as a passage for cooling oil.

本発明は、ハウジング5のエンドキャップ6にエア供給
口14を設け、テーパスリーブ3の外周面にエア通路と
なるスパイラル溝15を設ける。
In the present invention, an air supply port 14 is provided in the end cap 6 of the housing 5, and a spiral groove 15 serving as an air passage is provided in the outer peripheral surface of the tapered sleeve 3.

尚、第3図で示すように、テーパスリーブ3の内周面に
もスパイラル溝15aを設けてもよい。このスパイラル
溝15.15aの流路抵抗は、ロータ2とステータ4と
の隙間16の流路抵抗と同程度に設定する。さらに、必
要に応じては、ハウジング5内に供給されたエアが外部
に洩れないようにエンドキャップ6とハウジング5の接
合部にシリコンゴム等のシール材18が塗布され、また
、ステーター4の外周とハウジング5とのすき間を通し
てエアーが流れないように、これらの接合部にもシール
材18が塗布されている。
Incidentally, as shown in FIG. 3, a spiral groove 15a may also be provided on the inner circumferential surface of the tapered sleeve 3. The flow path resistance of this spiral groove 15.15a is set to be approximately the same as the flow path resistance of the gap 16 between the rotor 2 and the stator 4. Furthermore, if necessary, a sealing material 18 such as silicone rubber is applied to the joint between the end cap 6 and the housing 5 to prevent the air supplied into the housing 5 from leaking to the outside. A sealing material 18 is also applied to these joints to prevent air from flowing through the gap between the housing 5 and the housing 5.

本発明は上記の通りの構造であるから、エア供給口14
よりハウジング5内に供給されたエアは、ロータ2とス
テータ4との隙間16並びにテーパスリーブ3のスパイ
ラル溝15.15aを通ってロータ2やステータ4から
の発熱を熱交換して冷却し、モータ動力線引出し穴17
より外気に放出されるものである。これによりステータ
4は、その外周部は従来の冷却油により、内周はエアに
より冷却され、また、ロータ2は外周並びに内周をエア
にて冷却することができる。
Since the present invention has the structure as described above, the air supply port 14
The air supplied into the housing 5 passes through the gap 16 between the rotor 2 and stator 4 and the spiral groove 15.15a of the tapered sleeve 3, exchanges heat generated from the rotor 2 and the stator 4, and cools the motor. Power line extraction hole 17
It is released into the outside air. As a result, the stator 4 can be cooled at its outer circumference by conventional cooling oil and its inner circumference by air, and the rotor 2 can be cooled by air at its outer and inner circumferences.

〈発明の効果〉 以上のように本発明によると、ロータ並びにステータを
エアによる冷却を可能としたものであるから、ビルトイ
ンモータの問題点であった、モータからの発熱による熱
影響を防止し、超精密加工機の精度が確保される利点が
ある。
<Effects of the Invention> As described above, according to the present invention, since the rotor and stator can be cooled with air, it is possible to prevent the thermal effects caused by the heat generated from the motor, which was a problem with built-in motors. This has the advantage of ensuring the accuracy of ultra-precision processing machines.

【図面の簡単な説明】 第1図は本発明のモータを備えた加工機の一部断面図、
第2図は本発明の要部断面図、第3図は本発明の他の実
施例を示す断面図、第4図は従来のモータの断面図であ
る。 111・主軸、1袋・・テーパ外径、2・番ロータ、3
II・テーパスリーブ、4・・ステータ、5働・ハウジ
ング、6・拳エンドキャッフ、14・・エア供給口、1
5.15a・・スパイラル溝、16・・隙間。
[Brief Description of the Drawings] Fig. 1 is a partial cross-sectional view of a processing machine equipped with the motor of the present invention;
FIG. 2 is a sectional view of a main part of the present invention, FIG. 3 is a sectional view showing another embodiment of the present invention, and FIG. 4 is a sectional view of a conventional motor. 111・Main shaft, 1 bag・Tapered outer diameter, No. 2 rotor, 3
II・Taper sleeve, 4・Stator, 5 Working・Housing, 6・Fist end cuff, 14・Air supply port, 1
5.15a...Spiral groove, 16...Gap.

Claims (4)

【特許請求の範囲】[Claims] (1)主軸の後端部のテーパ外径にテーパスリーブを介
してロータを嵌着し、このロータと対応するステータを
ハウジングに固定した主軸駆動モータにおいて、ハウジ
ングのエンドキャップにハウジング内にエアを供給する
エア供給口を設け、前記テーパスリーブにエア通路とな
るスパイラル溝を設けたことを特徴とする主軸駆動モー
タ。
(1) In a main shaft drive motor in which a rotor is fitted to the tapered outer diameter of the rear end of the main shaft via a tapered sleeve, and a stator corresponding to the rotor is fixed to a housing, air is supplied into the housing to the end cap of the housing. A main shaft drive motor, characterized in that an air supply port is provided, and a spiral groove serving as an air passage is provided in the tapered sleeve.
(2)前記テーパスリーブに設けられるスパイラル溝は
、テーパスリーブの外周面とした特許請求の範囲第1項
記載の主軸駆動モータ。
(2) The main shaft drive motor according to claim 1, wherein the spiral groove provided in the tapered sleeve is formed on the outer peripheral surface of the tapered sleeve.
(3)前記テーパスリーブに設けられるスパイラル溝は
、テーパスリーブの内、外周面とした特許請求の範囲第
1項記載の主軸駆動モータ。
(3) The main shaft drive motor according to claim 1, wherein the spiral groove provided in the tapered sleeve is formed on the inner and outer peripheral surfaces of the tapered sleeve.
(4)前記テーパスリーブに設けられるスパイラル溝の
流路抵抗は、ステータとロータ間の隙間の流路抵抗と同
程度とした特許請求の範囲第1項記載の主軸駆動モータ
(4) The spindle drive motor according to claim 1, wherein the flow path resistance of the spiral groove provided in the tapered sleeve is approximately the same as the flow path resistance of the gap between the stator and the rotor.
JP60182910A 1985-08-22 1985-08-22 Main shaft drive motor Granted JPS6244044A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60182910A JPS6244044A (en) 1985-08-22 1985-08-22 Main shaft drive motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60182910A JPS6244044A (en) 1985-08-22 1985-08-22 Main shaft drive motor

Publications (2)

Publication Number Publication Date
JPS6244044A true JPS6244044A (en) 1987-02-26
JPH0510021B2 JPH0510021B2 (en) 1993-02-08

Family

ID=16126519

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60182910A Granted JPS6244044A (en) 1985-08-22 1985-08-22 Main shaft drive motor

Country Status (1)

Country Link
JP (1) JPS6244044A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018164336A (en) * 2017-03-24 2018-10-18 日本電産株式会社 Stator unit, motor, and fan motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018164336A (en) * 2017-03-24 2018-10-18 日本電産株式会社 Stator unit, motor, and fan motor

Also Published As

Publication number Publication date
JPH0510021B2 (en) 1993-02-08

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