US 11,940,086 B2
Table rotation device and machine tool
Jojiro Kimura, Niwa-gun (JP); Makoto Tahara, Niwa-gun (JP); and Nobuhiro Sakai, Niwa-gun (JP)
Assigned to YAMAZAKI MAZAK CORPORATION, Aichi (JP)
Filed by Yamazaki Mazak Corporation, Niwa-gun (JP)
Filed on May 18, 2022, as Appl. No. 17/746,960.
Application 17/746,960 is a continuation of application No. PCT/JP2019/045432, filed on Nov. 20, 2019.
Prior Publication US 2022/0275903 A1, Sep. 1, 2022
Int. Cl. F16M 11/00 (2006.01); F16C 19/16 (2006.01); F16M 1/04 (2006.01)
CPC F16M 1/04 (2013.01) [F16C 19/16 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A table rotation device comprising:
a bearing assembly comprising:
a fixed ring provided around a rotation axis;
a movable ring provided coaxially with the fixed ring to face the fixed ring; and
rolling elements provided between the fixed ring and the movable ring so that the movable ring is rotatable about the rotation axis with respect to the fixed ring;
a table support member connected to the movable ring so as to fix a position of the table support member relative to a position of the movable ring;
a support block connected to the fixed ring so as to fix a position of the support block relative to a position of the fixed ring; and
a cooling block connected to at least one of the fixed ring and the support block such that the cooling block is in contact with both the fixed ring and the support block, the cooling block providing a cooling passage.