公开(公告)号：US20210025485A1

公开(公告)日：2021-01-28

申请号：US16518295

申请日：2019-07-22

Applicant: HIWIN TECHNOLOGIES CORP.

Inventor： YU-HSIN LIN ,  CHI-YING YEN

IPC: F16H57/01 ,  F16H25/20 ,  G01L5/24

Abstract: A ball screw mountable on a mounting bed includes a screw shaft having a cylindrical shaft body which extends along an axis, and a helical external groove which is provided on the shaft body, a ball nut having a carrier seat which is rotatably sleeved around the shaft body and which has a carrier portion for carrying the mounting bed, and at least one reaction force sensing module attached to the carrier seat and configured to abut against the mounting bed for measuring a reaction force exerted on the mounting bed by the ball nut during displacement of the ball nut along the screw shaft.

公开(公告)号：US20220074811A1

公开(公告)日：2022-03-10

申请号：US17013999

申请日：2020-09-08

Applicant: HIWIN TECHNOLOGIES CORP.

Inventor： YU-HSIN LIN

IPC: G01M13/00

Abstract: A method for assessing preload degradation of a ball screw is to be implemented by a computer device. The method includes: obtaining an entry of time-domain vibration data based on a vibration signal which is related to vibrations of balls of the ball screw; obtaining an entry of frequency-domain vibration derived data based on the time-domain vibration data; obtaining a vibration eigenvector based on the entry of frequency-domain vibration derived data; performing preload assessment based on the vibration eigenvector, reference vibration vectors and a preload assessment range to obtain a result of the preload assessment; and determining whether preload degradation has occurred on the ball screw based on the result of the preload assessment.