Title:
COMPRESSION MOLDING METHOD FOR SELF-ROTATING SELF-TIGHTENING NUT AND SELF-TIGHTENING WASHER
Document Type and Number:
WIPO Patent Application WO/2022/088502
Kind Code:
A1
Abstract:
Disclosed in the present invention is a compression molding method for a self-rotating self-tightening nut and a self-tightening washer. The self-tightening nut, as a whole, is in the shape of a regular hexagon, a first through hole is formed in the center, and a thread is provided on the inner wall of the first through hole; the self-tightening washer comprises a top and a bottom; the top is a driven structure, and the bottom is a stop structure; the driven structure at the top, as a whole, is in the shape of a regular hexagon, and a second through hole is formed at the center; the second through hole has a diameter greater than a nominal diameter of the self-tightening nut, and has a smooth inner wall; two or more sections of second self-rotating protrusions which are connected end to end are provided right above the top, and the protrusions, as a whole, define a closed pattern. The present invention provides a compression molding method for a self-rotating self-tightening nut and a self-tightening washer which are simple to manufacture and can rotate in conjunction with each other.
Inventors:
LI ZHENGJI (CN)
Application Number:
PCT/CN2021/070382
Publication Date:
May 05, 2022
Filing Date:
January 06, 2021
Export Citation:
Assignee:
ZHEJIANG ZIJINWANG MACHINARY CO LTD (CN)
International Classes:
B21D53/24; F16B39/282; C21D1/18; C21D9/00; F16B33/00; F16B39/24
Foreign References:
| CN110725848A | 2020-01-24 | |||
| CN205190490U | 2016-04-27 | |||
| CN202531610U | 2012-11-14 | |||
| JP2005273890A | 2005-10-06 |
Attorney, Agent or Firm:
HANGZHOU TIANHAO PATENT AGENCY CO.LTD (CN)
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