公开(公告)号：US12130261B2

公开(公告)日：2024-10-29

申请号：US17605316

申请日：2020-04-24

Applicant: THK CO., LTD.

Inventor： Shuhei Yamanaka ,  Katsuya Iida ,  Takuya Sakamoto ,  Yoshiyuki Honjo ,  Hiroshi Inoko ,  Masatomo Tokuno ,  Satoru Nagai

IPC: G01N29/12 ,  G01M15/02

CPC classification number: G01N29/12 ,  G01M15/02

Abstract: An abnormality diagnosis system that diagnoses an abnormality related to each control shaft in equipment in which the plurality of control shafts, each including a motor and an output unit driven by the motor, are incorporated, includes: a plurality of vibration sensors that are provided for the plurality of control shafts, respectively, and that detect vibration occurring in connection with driving of the motor corresponding to each control shaft; a calculation unit that calculates, for each of the plurality of control shafts, vibration levels in a plurality of predetermined frequency ranges, based on vibration information detected by each of the plurality of vibration sensors; and a diagnosis unit that diagnoses an abnormality related to each control shaft, based on a distribution state, across the plurality of predetermined frequency ranges and across the plurality of control shafts, of the vibration levels calculated by the calculation unit.

公开(公告)号：US20220214311A1

公开(公告)日：2022-07-07

申请号：US17605316

申请日：2020-04-24

Applicant: THK CO., LTD.

Inventor： Shuhei Yamanaka ,  Katsuya Iida ,  Takuya Sakamoto ,  Yoshiyuki Honjo ,  Hiroshi Inoko ,  Masatomo Tokuno ,  Satoru Nagai

IPC: G01N29/12 ,  G01M15/02

Abstract: An abnormality diagnosis system that diagnoses an abnormality related to each control shaft in equipment in which the plurality of control shafts, each including a motor and an output unit driven by the motor, are incorporated, includes: a plurality of vibration sensors that are provided for the plurality of control shafts, respectively, and that detect vibration occurring in connection with driving of the motor corresponding to each control shaft; a calculation unit that calculates, for each of the plurality of control shafts, vibration levels in a plurality of predetermined frequency ranges, based on vibration information detected by each of the plurality of vibration sensors; and a diagnosis unit that diagnoses an abnormality related to each control shaft, based on a distribution state, across the plurality of predetermined frequency ranges and across the plurality of control shafts, of the vibration levels calculated by the calculation unit.

公开(公告)号：US20170146054A1

公开(公告)日：2017-05-25

申请号：US15310210

申请日：2015-05-15

Applicant: THK CO., LTD.

Inventor： Hisashi Konno ,  Tsutomu Tokairin ,  Hiroshi Inoko

IPC: F16C11/06

CPC classification number: F16C11/0633 ,  F16C11/0609 ,  F16C11/0623 ,  F16C11/0657 ,  F16C11/0671 ,  F16C11/0685 ,  F16C11/069 ,  F16C11/0695 ,  F16C2226/38

Abstract: The ball joint includes: a ball stud including: a shaft member; and a ball portion formed at one end of the shaft member; and a holder made of a synthetic resin and configured to accommodate the ball portion in a pivotable manner. The holder includes: an opening portion from which the shaft member protrudes; a first member including a first ball sliding contact surface having a concave spherical shape approximate to a spherical surface of the ball portion; and a second member including: a second ball sliding contact surface having a concave spherical shape approximate to the spherical surface of the ball portion; and the opening portion formed in a center of the second ball sliding contact surface. Further, the first member and the second member respectively include joining surfaces fixed to each other by welding, and respectively include fixation reference surfaces that are brought into abutment against each other.