Title:
BALL SCREW MECHANISM, MOLD CLAMPING DEVICE, AND INJECTION MOLDING MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/095649
Kind Code:
A1
Abstract:
The ball screw mechanism (18) is configured from a ball screw (19), a ball nut (20), a lock nut (28) provided on male threads formed on part of the ball screw (19), a bearing mechanism (26) that rotatably supports the ball screw (19), and a bearing retainer (29). The bearing mechanism (26) is interposed between the bearing retainer (29) and the lock nut (28). In the present disclosure, a load concentration relief portion (39) is formed in the lock nut (28) to relieve the concentration/unevenness of the load acting on each crest (37a, 37b, …) of the female threads (33) formed therein.
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Inventors:
MITANI SOUMA (JP)
Application Number:
PCT/JP2022/042151
Publication Date:
June 01, 2023
Filing Date:
November 11, 2022
Export Citation:
Assignee:
JAPAN STEEL WORKS LTD (JP)
International Classes:
B29C45/03; B29C45/17; B29C45/64
Foreign References:
| US20150290856A1 | 2015-10-15 | |||
| CN205167439U | 2016-04-20 | |||
| CN213117050U | 2021-05-04 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P.C. (JP)
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