US 11,988,276 B2
Rotary table
Tetsuya Sakai, Toki (JP); and Kousuke Tobari, Toki (JP)
Assigned to NIPPON THOMPSON CO., LTD., Tokyo (JP)
Appl. No. 17/758,831
Filed by NIPPON THOMPSON CO., LTD., Tokyo (JP)
PCT Filed Dec. 10, 2020, PCT No. PCT/JP2020/046102
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2021/145111, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2020-005902 (JP), filed on Jan. 17, 2020.
Prior Publication US 2023/0044626 A1, Feb. 9, 2023
Int. Cl. F16H 57/04 (2010.01); B23Q 1/25 (2006.01); F16H 19/08 (2006.01); F16H 57/021 (2012.01); F16H 57/039 (2012.01); F16H 57/12 (2006.01); F16H 57/031 (2012.01)
CPC F16H 57/12 (2013.01) [B23Q 1/25 (2013.01); F16H 19/08 (2013.01); F16H 57/021 (2013.01); F16H 57/039 (2013.01); F16H 2057/0213 (2013.01); F16H 57/031 (2013.01); F16H 57/0424 (2013.01); F16H 57/0498 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A rotary table comprising:
a base body having a planar holding surface;
a worm wheel disposed on the base body to be rotatable around an axis, the worm wheel having an outer circumferential surface with a first gear formed over an entire area in a circumferential direction;
an inner ring disposed on an inner circumference side of the worm wheel and fixed to the base body;
a plurality of rolling elements disposed to be able to roll on an inner circumferential surface of the worm wheel and an outer circumferential surface of the inner ring; and
a worm screw unit fixed on the holding surface;
the worm screw unit including
a worm screw held to be rotatable around an axis, the worm screw having a second gear meshing with the first gear, and
a worm screw housing surrounding and holding the worm screw, the worm screw housing being fixed to contact the holding surface at a planar contacting surface thereof,
one of the holding surface and the contacting surface having a cylindrical pin arranged to protrude therefrom,
the other of the holding surface and the contacting surface having a first recess formed to receive the pin, and being elongated in a radial direction of the worm wheel, and being wider than an outer diameter of the pin,
the pin being movable in the first recess in a radial direction of the worm wheel such that the worm screw housing is movable in the radial direction and rotatable with respect to the base body about a pivot point comprising the pin.