Title:
ELECTRIC CYLINDER SYSTEM AND METHOD OF DETECTING ABNORMALITY OF ELECTRIC CYLINDER
Document Type and Number:
WIPO Patent Application WO/2021/044926
Kind Code:
A1
Abstract:
This electric cylinder system comprises: a rod; a ball screw mechanism that has a ball screw rotating by a driving force of an electric motor; a nut that is connected to the rod and moves linearly with the rod in the axial direction of the ball screw due to the rotational movement of the ball screw; a cylindrical body that has a contact part abutted by the linearly moving nut and supports the ball screw mechanism such that the ball screw mechanism can be displaced in the axial direction of the ball screw; a strain detector that is fixed to the cylindrical body and detects a value according to the displacement of the ball screw mechanism; and a control unit that abuts the nut against the contact part to displace the ball screw mechanism, and detects an abnormality in the strain detector on the basis of the value detected by the strain detector according to the displacement of the ball screw mechanism.
Inventors:
ISHIDA YUU (JP)
NAKAI TAKUMA (JP)
NAKAI TAKUMA (JP)
Application Number:
PCT/JP2020/032220
Publication Date:
March 11, 2021
Filing Date:
August 26, 2020
Export Citation:
Assignee:
SINTOKOGIO LTD (JP)
International Classes:
B30B1/18; B30B15/28; F16H25/22
Foreign References:
| JP2012147606A | 2012-08-02 | |||
| JP2005138110A | 2005-06-02 | |||
| JPH05264375A | 1993-10-12 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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