US 12,146,528 B2
Rotary table
Tetsuya Sakai, Toki (JP); and Kousuke Tobari, Toki (JP)
Assigned to NIPPON THOMPSON CO., LTD., Tokyo (JP)
Appl. No. 17/758,752
Filed by NIPPON THOMPSON CO., LTD., Tokyo (JP)
PCT Filed Dec. 10, 2020, PCT No. PCT/JP2020/046103
§ 371(c)(1), (2) Date Jul. 13, 2022,
PCT Pub. No. WO2021/145112, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2020-005903 (JP), filed on Jan. 17, 2020.
Prior Publication US 2023/0084834 A1, Mar. 16, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F16C 33/66 (2006.01); A47B 13/08 (2006.01); B23Q 1/52 (2006.01); B23Q 11/12 (2006.01); F16H 1/16 (2006.01)
CPC F16C 33/6622 (2013.01) [A47B 13/081 (2013.01); B23Q 1/52 (2013.01); B23Q 11/12 (2013.01); F16H 1/16 (2013.01)] 4 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,
the worm screw housing having an opposing surface facing the outer circumferential surface of the worm wheel,
the opposing surface having a first through hole formed to expose the second gear,
the worm screw housing including a flange portion protruding from the opposing surface and covering a side face that, of the first gear facing the opposing surface, is on an opposite side from the base body in an axial direction of the worm wheel.