US 12,122,006 B2
Machine tool including rotation indexing device
Yoshiki Harada, Toyama (JP); and Yohei Ikeda, Ishikawa-ken (JP)
Assigned to KOMATSU NTC LTD., Toyama (JP); and TSUDAKOMA KOGYO KABUSHIKI KAISHA, Ishikawa-Ken (JP)
Filed by KOMATSU NTC LTD., Toyama (JP); and TSUDAKOMA KOGYO KABUSHIKI KAISHA, Ishikawa-ken (JP)
Filed on May 23, 2022, as Appl. No. 17/751,168.
Claims priority of application No. 2021-094860 (JP), filed on Jun. 7, 2021.
Prior Publication US 2022/0388104 A1, Dec. 8, 2022
Int. Cl. B23Q 1/64 (2006.01); B23Q 1/01 (2006.01); B23Q 1/54 (2006.01)
CPC B23Q 1/64 (2013.01) [B23Q 1/015 (2013.01); B23Q 1/5468 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A machine tool comprising:
a rotation indexing device configured to index an angular position of a rotation target member attached to an end portion of a rotary shaft, the rotation indexing device including:
a frame configured to accommodate the rotary shaft in a state of rotatably supporting the rotary shaft;
a drive motor configured to rotationally drive the rotary shaft;
a drive transmission mechanism accommodated in a space inside the frame and configured to transmit rotation of an output shaft of the drive motor to the rotary shaft, the drive transmission mechanism including a gear mechanism having a plurality of gears in mesh with each other, the space including one or more storage parts configured to store lubricating oil for lubricating at least the gear mechanism, corresponding to the gear mechanism, and partitioned with respect to other part in the space inside the frame by a seal member;
a detection device configured to detect a height position of an oil level of the lubricating oil stored in the one or more storage parts, and being provided on a one-to-one basis with respect to a detection target storage part, which is set as a detection target, of the one or more storage parts; and
a display device connected to the detection device and configured to display information regarding the height position detected by the detection device and to display the information regarding the height position in a number.