Title:
ANTI-LOOSENING THREADED PART
Document Type and Number:
WIPO Patent Application WO/2015/000318
Kind Code:
A8
Abstract:
An anti-loosening threaded part comprises an internal threaded part (1) and an external threaded part (2). A cylindrical internal thread (3) is arranged in an inner hole of the internal threaded part (1), a cylindrical external thread (4) is arranged on a screw of the external threaded part (2), a wedge-shaped inclined surface (6) forming an included angle α or an included angle β with a longitudinal center axis (5) of the external thread (4) or the internal thread (3) is arranged at a crest of the external thread (4) or the internal thread (3), and tanα or tanβ is less than a dynamic friction factor between the wedge-shaped inclined surface (6) and a contact surface of the internal thread (3) or the external thread (4). After the internal thread part and the external thread part are mutually tightened, the wedge-shaped inclined surface (6) and a surface of the internal thread (3) or an external thread (4) form a mutually close contact structure, that is, a horizontal locking structure, and as long as the surface of the internal thread or the external thread and the wedge-shaped inclined surface are in a mutually close contact through pretightening force, loosening can be effectively prevented in cylindrical threaded part connecting pairs having threaded surfaces and made of various materials.
Inventors:
XU SONGLIN (CN)
Application Number:
PCT/CN2014/075346
Publication Date:
February 26, 2015
Filing Date:
April 15, 2014
Export Citation:
Assignee:
XU SONGLIN (CN)
International Classes:
F16B39/30; F16B39/282
Attorney, Agent or Firm:
NANJING TIANHUA PATENT AGENT CO., LTD. (Block A1 World Trade Center Building, No. 67 Shanxi Road, Gulo, Nanjing Jiangsu 9, CN)
Download PDF: