US 12,404,958 B2
Rotating joint
Shinichi Ikeno, Toyama (JP); and Miyabi Togashi, Yamagata (JP)
Assigned to NACHI-FUJIKOSHI CORP., Tokyo (JP); and NACHI TohokuSeiko Co., Ltd., Yamagata (JP)
Filed by NACHI-FUJIKOSHI CORP., Tokyo (JP); and NACHI TohokuSeiko Co., Ltd., Yamagata (JP)
Filed on Apr. 12, 2024, as Appl. No. 18/634,122.
Claims priority of application No. 2023-066523 (JP), filed on Apr. 14, 2023.
Prior Publication US 2024/0360929 A1, Oct. 31, 2024
Int. Cl. F16L 27/08 (2006.01); F16L 27/087 (2006.01); G01B 7/30 (2006.01)
CPC F16L 27/0804 (2013.01) [F16L 27/087 (2013.01); G01B 7/30 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A rotary joint comprising:
a flange;
a rotor whose one end is connected with the flange and that has a tubular shape;
a shaft whose outer periphery is connected with an inner periphery of the rotor so that the shaft is rotatable about a central axis of the rotor as a rotation axis, the shaft including an opening which serves as a drain oil passage formed along the central axis and a discharge opening that extends from the opening to the outer periphery of the shaft;
a rod whose one end is connected with the flange and that is provided in the opening so as to extend from one end side of the shaft along the central axis;
an angle measurement unit that is connected with the opening so as to extend from another end side of the shaft to another end of the rod and that measures a rotation angle between the rod and the shaft with the central axis serving as the rotation axis; and
a shield member that is formed in a cup shape, an outer periphery of the shield member being connected with the opening so that the shield member is rotatable along the central axis, the other end of the rod being connected with an inner periphery of the shield member, and the shield member acting as a shield between the rod and the angle measurement unit in the opening and being provided away from the angle measurement unit.