JPH0362702U

JPH0362702U -

Info

Publication number: JPH0362702U
Application number: JP12234989U
Authority: JP
Priority date: 1989-10-19
Filing date: 1989-10-19
Publication date: 1991-06-19
Anticipated expiration: 2004-10-19
Also published as: JP2530340Y2

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例の縦断面図である。図中、１……スピンドル軸、２……その貫通孔
、３……工具取付用テーパ穴、４Ｂ……中間アン
ギユラ玉軸受、４Ｃ……後端アンギユラ玉軸受、
７……前軸受ブロツク、１５……第１のサーボモ
ータ、１６……そのロータ、１７……第２のサー
ボモータ、１８……そのロータ、３１……第１ハ
ウジング、３２……中間支持板、３３……第２ハ
ウジング、３４……後蓋、３７……第１のサーボ
モータのステータ、３８……その冷却ジヤケツト
、５７……第２のサーボモータのステータ、５８
……その冷却ジヤケツト。 FIG. 1 is a longitudinal sectional view of an embodiment of the present invention. In the figure, 1...spindle shaft, 2...through hole thereof, 3...tapered hole for tool attachment, 4B...middle angular ball bearing, 4C...rear end angular ball bearing,
7... Front bearing block, 15... First servo motor, 16... Its rotor, 17... Second servo motor, 18... Its rotor, 31... First housing, 32... Intermediate support plate , 33... Second housing, 34... Rear cover, 37... Stator of the first servo motor, 38... Cooling jacket thereof, 57... Stator of the second servo motor, 58
...That cooling jacket.

Claims

【実用新案登録請求の範囲】 (1) ハウジング内にスピンドル軸を直接駆動す
るサーボモータを内蔵してなるモータ内蔵型スピ
ンドル装置において、前記スピンドル軸を支承する軸受を前後両端部
と中間部とに備え、少なくとも一端部の軸受と中
間部の軸受は定圧予圧され、前端部と中間部の軸
受間には第１のサーボモータが、中間部と後端部
の軸受間には第２のサーボモータがそれぞれに配
設され、各サーボモータはスピンドル軸外面に固
着したロータと該ロータに周対向に前記ハウジン
グ内面に固着したステータとを有することを特徴
とする２モータ内蔵型スピンドル装置。 (2) 前記スピンドル軸のハウジングは、前記第
１のサーボモータが内蔵された第１ハウジングと
、該第１ハウジングの後端に配設された中間支持
板を介して接続され前記第２のサーボモータが内
蔵された第２ハウジングと、該第２ハウジグの後
端に配設された後蓋とを備えている請求項(1)記
載の２モータ内蔵型スピンドル装置。 (3) 前記スピンドル軸は中空スピンドル軸で、
先端には工具取付けテーパ穴を有し、且つ前記第
１ハウジング、第２ハウジングはサーボモータの
ステータ外周部に冷却用ジヤケツトを有している
請求項(2)記載の２モータ内蔵型スピンドル装置
。[Scope of Claim for Utility Model Registration] (1) In a motor built-in spindle device having a built-in servo motor for directly driving a spindle shaft in a housing, bearings for supporting the spindle shaft are provided at both front and rear ends and at an intermediate portion. At least one end bearing and an intermediate bearing are preloaded with a constant pressure, a first servo motor is provided between the front end and intermediate bearings, and a second servo motor is provided between the intermediate and rear end bearings. A two-motor built-in spindle device, wherein each servo motor has a rotor fixed to an outer surface of a spindle shaft and a stator fixed to an inner surface of the housing in circumferential opposition to the rotor. (2) The housing of the spindle shaft is connected to a first housing in which the first servo motor is built in, and an intermediate support plate disposed at the rear end of the first housing, and the second servo motor is connected to the first housing through an intermediate support plate disposed at the rear end of the first housing. The two-motor built-in spindle device according to claim 1, comprising: a second housing having a built-in motor; and a rear cover disposed at a rear end of the second housing. (3) the spindle shaft is a hollow spindle shaft;
3. The two-motor built-in spindle device according to claim 2, wherein the tip has a tapered hole for attaching a tool, and the first housing and the second housing have a cooling jacket on the outer periphery of the stator of the servo motor.