The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2022
Filed:
Oct. 11, 2018
Kuroda Precision Industries Ltd., Kanagawa, JP;
KURODA PRECISION INDUSTRIES LTD., Kanagawa, JP;
Abstract
To prevent the axial compressive force that acts on the rotor core from becoming unnecessarily large and to enable a high-quality magnet embedded core to be manufactured efficiently, a retaining jig () for a rotor core () including a magnet insertion hole () forming a through hole defining openings on end surfaces in an axial direction includes: a first plate () configured to contact against one of the end surfaces of the rotor core () and including a gate () configured to communicate with the corresponding opening of the magnet insertion hole (); a second plate () configured to oppose another of the end surfaces of the rotor core (); a closure member () coupled to the second plate () via a compression spring member () and configured to be capable of closing the opening of the magnet insertion hole () on the other of the end surfaces; and a coupling member () that couples the first plate () and the second plate () to each other such that the closure member () closes the opening and a spring force of the compression spring member () becomes a prescribed value.