公开(公告)号：US20180003212A1

公开(公告)日：2018-01-04

申请号：US15541022

申请日：2016-01-05

申请人： DAE KWANG METAL.CO.LTD

发明人： Hyeon Woo SEO ,  Won Beom CHANG

IPC分类号： F16B39/30 ,  B23G1/02 ,  F16B33/02 ,  B23G1/16 ,  B21H3/02 ,  B21H3/08

CPC分类号： F16B39/30 ,  B21H3/02 ,  B21H3/025 ,  B21H3/08 ,  B23B27/065 ,  B23G1/02 ,  B23G1/16 ,  B23G5/04 ,  B23G5/06 ,  B23G2210/48 ,  F16B33/02

摘要： The present invention provides a looseness-prevention screw thread structure including a screw thread having a predetermined pitch, a no-load flank which is an inclined surface in a direction in which the screw thread is advanced, and a load flank which is an inclined surface in a direction in which the screw thread is retracted, the no-load flank and the load flank being formed at both sides of the screw thread, in which the no-load flank of the screw thread includes: a first tangential portion which abuts against an arc portion formed at a thread crest of an opposing fastening object; and a second tangential portion which has a preset angle with respect to the first tangential portion and abuts against the arc portion.