Title:
A malfunction detection device and an abnormality detecting method of a ball screw device
Document Type and Number:
Japanese Patent JP6051606
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately detect abnormality of a ball screw when an end of a ball screw nut is firmly fixed to a table with mass of ten times or more of that of the ball screw nut.SOLUTION: A vibration sensor 10 attached to a ball screw nut 6 detects vibration, vibration data in a ball screw abnormality detection frequency band is filtered from the detected vibration data, and abnormality of a ball screw is detected on the basis of filtered vibration data in the ball screw abnormality detection frequency band. In that case, a frequency band equal to or below a fixed-free primary longitudinal natural frequency of the ball screw nut 6 is filtered as an abnormality detection frequency band of the ball screw 9. If an axial end of the ball screw nut 6 is firmly fixed to a linearly moving table 1 of high rigidity having mass of ten times or more of that of the ball screw nut 6, the ball screw nut system has support close to fixed-free support, and thus abnormality is detected from a change in a harmonic component in a frequency band equal to or below the fixed-free primary natural frequency of the ball screw nut 6.
Inventors:
Totoya Masato
Application Number:
JP2012134330A
Publication Date:
December 27, 2016
Filing Date:
June 14, 2012
Export Citation:
Assignee:
Nippon Seiko Co., Ltd.
International Classes:
F16H25/24; F16H25/22
Domestic Patent References:
| JP2010060551A | ||||
| JP6323899A | ||||
| JP2010190318A | ||||
| JP2006133162A | ||||
| JP2010038567A |
Attorney, Agent or Firm:
Tetsuya Mori
Megumi Konishi
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka
Megumi Konishi
Hide Tanaka Tetsu
Ichi Hirose
Toru Miyasaka