ROTARY TABLE DEVICE - NIPPON THOMPSON CO LTD

Title:

ROTARY TABLE DEVICE

Document Type and Number:

WIPO Patent Application WO/2022/113694

Kind Code:

A1

Abstract:

This rotary table device comprises: a foundation part; a bearing mounted to the foundation part; a table rotatably supported on the foundation part with the bearing therebetween; and motors for rotating the table with respect to the foundation part toward the rotation direction of the bearing. The table has a table groove part that is annularly formed in the outer circumferential surface along the entire circumference and is recessed in the radial direction of the bearing. The foundation part has an annular coil base that is inserted in the table groove part and is disposed along the table groove part. The motors include a first motor and a second motor. The first motor includes, on a wall surface of the table defining the table groove part, a first magnet array which is an array of a plurality of magnets arrayed along the rotation direction of the bearing, and includes, on a first surface of the coil base, a first coil array which is an array of a plurality of coils arrayed so as to face the first magnet array. The second motor includes, on the wall surface of the table defining the table groove part, a second magnet array which is an array of a plurality of magnets arrayed along the rotation direction of the bearing, and includes, in the axial direction of the bearing and on a second surface of the coil base opposite to the first surface, a second coil array which is an array of a plurality of coils arrayed so as to face the second magnet array.

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Inventors:

SHIMOYOSHI HIROAKI (JP)
TOBARI KOUSUKE (JP)

Application Number:

PCT/JP2021/040725

Publication Date:

June 02, 2022

Filing Date:

November 05, 2021

Export Citation:

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Assignee:

NIPPON THOMPSON CO LTD (JP)

International Classes:

H02K41/03; H02K16/00; H02K21/24

Foreign References:

JP2005333763A	2005-12-02
JP2005110353A	2005-04-21
JPH0759325A	1995-03-03
JPH11187635A	1999-07-09
JP2010284036A	2010-12-16
JP2002537749A	2002-11-05

Attorney, Agent or Firm:

KITANO Shuhei et al. (JP)

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