US 11,986,915 B2
Rotary table device
Tetsuya Nitta, Ishikawa-ken (JP); and Junichiro Ishizaki, Ishikawa-ken (JP)
Assigned to TSUDAKOMA KOGYO KABUSHIKI KAISHA, Ishikawa-Ken (JP)
Filed by TSUDAKOMA KOGYO KABUSHIKI KAISHA, Ishikawa-ken (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/701,175.
Claims priority of application No. 2021-084544 (JP), filed on May 19, 2021.
Prior Publication US 2022/0371136 A1, Nov. 24, 2022
Int. Cl. B23Q 1/50 (2006.01); B23Q 16/02 (2006.01); F16C 19/54 (2006.01)
CPC B23Q 1/50 (2013.01) [B23Q 16/025 (2013.01); F16C 19/54 (2013.01); F16C 2322/39 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A rotary table device comprising a table provided on one end-side of a main shaft rotatably supported in a frame; and a drive transmission mechanism configured to transmit rotation of an output shaft of a drive motor to the main shaft and including a drive transmission member having a spiral groove on an outer periphery and accommodated in an accommodation space formed in the frame, wherein the rotary table device is installed with an axis line of the main shaft being directed in a vertical direction, the table is supported with respect to the frame by a bearing provided between a lower surface of the table and an upper surface of the frame, and a space is provided between the lower surface of the table and the upper surface of the frame,
wherein the frame is provided with a communication passage that is a through-hole opening to the accommodation space and configured so that the space and the accommodation space communicate with each other, the communication passage penetrating the frame.