JPH04161034A - Spindle motor - Google Patents
Spindle motorInfo
- Publication number
- JPH04161034A JPH04161034A JP28650490A JP28650490A JPH04161034A JP H04161034 A JPH04161034 A JP H04161034A JP 28650490 A JP28650490 A JP 28650490A JP 28650490 A JP28650490 A JP 28650490A JP H04161034 A JPH04161034 A JP H04161034A
- Authority
- JP
- Japan
- Prior art keywords
- stator
- spindle head
- spindle
- housing
- cylinder
- 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
- 239000002826 coolant Substances 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 7
- 239000000110 cooling liquid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Motor Or Generator Frames (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、工作機械の主軸頭に組み込まれるいわゆるビ
ルトイン型の主軸モータの構造に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of a so-called built-in spindle motor that is incorporated into the spindle head of a machine tool.
従来の技術
一般に、この種の主軸モータは第3図に示すような構造
を有している。主軸モータ1のロータ2は主軸4に一体
化され、該主軸4は軸受8,9を介して主軸頭5の前側
ハウジング6と後側ハウジング7に支承されている。前
側ハウジング6と後側ハウジング7は主軸頭5の本体を
なす主軸頭筒体10の両端部に固装されている。一方、
主軸モータ1のステータ3は外周部に冷却用フィン12
を有する円筒11内にしまり嵌めなどの固着手段により
嵌装固定され、該円筒11を主軸頭筒体10に嵌装して
取り付けると共に、円筒11の外周部と主軸頭筒体10
の内周部との間にジャケット13を形成し、該ジャケッ
ト13に冷却液あるいは空気を通すことによってステー
タ3を冷却するようになっている。BACKGROUND OF THE INVENTION Generally, this type of main shaft motor has a structure as shown in FIG. A rotor 2 of a spindle motor 1 is integrated into a spindle 4, and the spindle 4 is supported by a front housing 6 and a rear housing 7 of a spindle head 5 via bearings 8 and 9. The front housing 6 and the rear housing 7 are fixed to both ends of a spindle head cylinder 10 that forms the main body of the spindle head 5. on the other hand,
The stator 3 of the main shaft motor 1 has cooling fins 12 on its outer periphery.
The cylinder 11 is fitted and fixed in a cylinder 11 having a cylindrical shape by a fixing means such as an interference fit, and the cylinder 11 is fitted and attached to the spindle head cylinder body 10, and the outer circumference of the cylinder 11 and the spindle head cylinder body 10 are fitted and fixed.
A jacket 13 is formed between the stator 3 and the inner periphery of the stator 3, and the stator 3 is cooled by passing a cooling liquid or air through the jacket 13.
発明が解決しようとする課題
しかし、上記従来の主軸モータは、ステータ3を円筒1
1に嵌装固定し、該円筒11をさらに主軸頭筒体10に
嵌装する三重構造であるから、部品数、組立工数が多く
なるばかりでなく、主軸頭全体が重厚で大型化するとい
う問題があった。しかも、ジャケット]3を通じて行な
う液冷又は空冷は、ステータ3を直接冷却するのではな
く、円筒11を介して間接的にステータ3を冷却するの
て、冷却効率が低いという難点があった。Problems to be Solved by the Invention However, in the above conventional main shaft motor, the stator 3 is connected to the cylinder 1.
Since it has a triple structure in which the cylinder 11 is fitted and fixed to the spindle head body 10, the number of parts and assembly steps are increased, and the spindle head as a whole becomes heavy and large. was there. In addition, liquid cooling or air cooling performed through the jacket 3 does not directly cool the stator 3, but indirectly cools the stator 3 through the cylinder 11, which has the disadvantage of low cooling efficiency.
また、液冷するためには、オイルクーラ、配管部品、シ
ーリング材等が必要で、さらにその保守点検及びオイル
クーラを運転するためのランニングコストなどが必要で
ある。一方、液冷に代え”C空冷しようとすると、液体
と空気の比熱の差によって液冷に比べて10数倍の空気
流量を必要とすることと、円筒11を介して間接冷却で
あるため、液冷の場合と同I〜ジャケット構造では充分
な流量が確保できないという不都合があった。In addition, liquid cooling requires an oil cooler, piping parts, sealing material, etc., and further requires maintenance and inspection and running costs for operating the oil cooler. On the other hand, if you try to use "C air cooling instead of liquid cooling, you will need an air flow rate ten times higher than liquid cooling due to the difference in specific heat between the liquid and air, and because it is indirect cooling via the cylinder 11, The same I-jacket structure as in the case of liquid cooling had the disadvantage that a sufficient flow rate could not be ensured.
本発明は上記の問題点を解決するもので、ステータの取
付は構造を簡素化して部品数を削減すると共に、重量を
軽減してコンパクト化を図り、同時にステータを直接冷
却できるようにしたビルトイン型の主軸モータを提供す
ることを目的とする。The present invention solves the above problems, and the stator is mounted using a built-in type that simplifies the structure and reduces the number of parts, reduces weight and makes it more compact, and at the same time allows direct cooling of the stator. The purpose is to provide a spindle motor for.
課題を解決するための手段
上記の目的を達成するために、本発明は、ステータが前
記主軸頭のハウジングに直接固定され、前記ステータの
外周部に冷却媒体の流通孔が設けられていることを特徴
とする。Means for Solving the Problems In order to achieve the above object, the present invention provides a stator that is directly fixed to the housing of the spindle head, and that cooling medium circulation holes are provided in the outer periphery of the stator. Features.
前記流通孔は、前記ステータの外周部四隅に長手方向に
貫通して設けることが好ましい。It is preferable that the communication holes are provided at four corners of the outer periphery of the stator so as to penetrate in the longitudinal direction.
作用
上記した構成により、ステータは流通孔を流れる冷却媒
体によって直接冷却される。Effect: With the above-described configuration, the stator is directly cooled by the cooling medium flowing through the flow holes.
実施例 以下、本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described below based on the drawings.
第1図は本発明による主軸モータ21の縦断面図を示し
、第2図は同要部の縦断側面図を示している。FIG. 1 shows a longitudinal sectional view of a main shaft motor 21 according to the present invention, and FIG. 2 shows a longitudinal sectional side view of the main parts thereof.
主軸モータ21のロータ22は主軸24に一体化され、
該主軸24か軸受28,29を介して主軸頭25の前側
ハウジング26と後側ハウジング27に支承されている
点は、第3図に示(7た従来の主軸モータ1と同一構造
である。The rotor 22 of the main shaft motor 21 is integrated with the main shaft 24,
The main shaft 24 is supported by a front housing 26 and a rear housing 27 of a main shaft head 25 via bearings 28 and 29, which is the same structure as the conventional main shaft motor 1 shown in FIG.
一方、主軸モータ2〕のステータ23は取付フランジ3
0.31を介して主軸頭25の前側ハウジング26と後
側ハウジング27に固定されている。該ステータ23に
は、第2図に示すように、外周部四隅に冷却媒体の流通
孔32が長手方向に貫通して設けられており、各流通孔
32は一方の取付フランジ30に設けた空気取入口33
に連通ずると共に、他方の取付フランジ31に設けた通
孔34を経て後側ハウジング27に設けた環状通路35
に連通し、該環状通路35は後側ハウジング27の上部
に取り付けたファン36の吸気口37に接続されている
。On the other hand, the stator 23 of the main shaft motor 2 is attached to the mounting flange 3.
0.31 to the front housing 26 and rear housing 27 of the spindle head 25. As shown in FIG. 2, the stator 23 is provided with cooling medium circulation holes 32 extending longitudinally through the four corners of the outer periphery. Intake port 33
and an annular passage 35 provided in the rear housing 27 through a through hole 34 provided in the other mounting flange 31.
The annular passage 35 is connected to an intake port 37 of a fan 36 attached to the upper part of the rear housing 27.
而して、空気取入口33から吸入された空気は流通孔3
2を通って直接ステータ23を空冷したのち、通孔34
を経て環状通路35に導かれ、ファン36の排気口(図
示せず)から排出される。Therefore, the air taken in from the air intake port 33 flows through the circulation hole 3.
After cooling the stator 23 directly through the through hole 34
The air is guided through the annular passage 35 and discharged from the exhaust port (not shown) of the fan 36.
なお、主軸モータ21が大型で発熱量が大きい場合には
、流通孔32に冷却液を通すことによって効果的に冷却
することが可能である。Note that if the main shaft motor 21 is large and generates a large amount of heat, it can be effectively cooled by passing a cooling liquid through the circulation hole 32 .
発明の詳細
な説明したように、本発明によれば、主軸モータのステ
ータが主軸頭のハウジングに直接固定されているから、
従来構造の主軸頭筒体10及び円筒11が不要となり、
それだけ部品数及び組立工数が削減され、重量を軽減し
てコンパクト化が図れる。As described in detail, according to the present invention, the stator of the spindle motor is directly fixed to the housing of the spindle head.
The spindle head cylinder 10 and cylinder 11 of the conventional structure are no longer required,
The number of parts and assembly man-hours are reduced accordingly, and weight and compactness can be achieved.
また、ステータに設けた流通孔を通じて空気又は液体を
流すことにより直接ステータを冷却するので、冷却効率
が高く、空冷でもステータを充分に冷却することができ
る。Furthermore, since the stator is directly cooled by flowing air or liquid through the circulation holes provided in the stator, the cooling efficiency is high, and the stator can be sufficiently cooled even with air cooling.
第1図は本発明に係る主軸モータ21の縦断面図で第2
図の1−1線に沿う矢視断面図、第2図は同要部の縦断
側面図、第3従来構造を示す縦断面図である。
21・・・主軸モータ 22・・・ロータ23・・・
ステータ 24・・・主軸25・・・主軸頭
26・・・前側ハウジング27・・・後側ハウジング
28.29・・・軸受
30.31・・・取付フランジ
32・・・流通孔 33・・・空気取入口34・
・・通孔 35・・・環状通路36・・・ファ
ンFIG. 1 is a vertical sectional view of the main shaft motor 21 according to the present invention, and FIG.
FIG. 2 is a longitudinal sectional view taken along the line 1-1 in the figure, a longitudinal sectional side view of the same essential parts, and a longitudinal sectional view showing a third conventional structure. 21... Main shaft motor 22... Rotor 23...
Stator 24...Spindle 25...Spindle head
26... Front housing 27... Rear housing 28.29... Bearing 30.31... Mounting flange 32... Distribution hole 33... Air intake port 34.
...Through hole 35...Annular passage 36...Fan
Claims (2)
って、ステータが前記主軸頭のハウジングに直接固定さ
れ、前記ステータの外周部に冷却媒体の流通孔が設けら
れていることを特徴とする主軸モータ。(1) A spindle motor built into the spindle head of a machine tool, characterized in that a stator is directly fixed to the housing of the spindle head, and cooling medium circulation holes are provided in the outer periphery of the stator. Main shaft motor.
方向に貫通して設けられている請求項1記載の主軸モー
タ。(2) The main shaft motor according to claim 1, wherein the communication holes are provided at four corners of the outer circumference of the stator so as to penetrate in the longitudinal direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28650490A JPH04161034A (en) | 1990-10-24 | 1990-10-24 | Spindle motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP28650490A JPH04161034A (en) | 1990-10-24 | 1990-10-24 | Spindle motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04161034A true JPH04161034A (en) | 1992-06-04 |
Family
ID=17705268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP28650490A Pending JPH04161034A (en) | 1990-10-24 | 1990-10-24 | Spindle motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04161034A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030069663A (en) * | 2002-02-22 | 2003-08-27 | 주식회사 광진기계 | A spindle motor structure with fan |
JP2006121780A (en) * | 2004-10-19 | 2006-05-11 | Mitsubishi Motors Corp | Cooler for motor |
EP2492047A1 (en) * | 2011-02-28 | 2012-08-29 | Siemens Aktiengesellschaft | Motor spindle unit with housing-free direct drive |
JP2013106365A (en) * | 2011-11-10 | 2013-05-30 | Yaskawa Electric Corp | Rotary electric machine |
-
1990
- 1990-10-24 JP JP28650490A patent/JPH04161034A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030069663A (en) * | 2002-02-22 | 2003-08-27 | 주식회사 광진기계 | A spindle motor structure with fan |
JP2006121780A (en) * | 2004-10-19 | 2006-05-11 | Mitsubishi Motors Corp | Cooler for motor |
EP2492047A1 (en) * | 2011-02-28 | 2012-08-29 | Siemens Aktiengesellschaft | Motor spindle unit with housing-free direct drive |
JP2013106365A (en) * | 2011-11-10 | 2013-05-30 | Yaskawa Electric Corp | Rotary electric machine |
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