Author(s): QI Chuan-gang
Pages: 105-106
Year: 2015 Issue:  9
Journal: Coal Mine Machinery
Keyword:  non-contact; wedge; backstop; torsion spring;
Abstract: Backstop is an effective anti reverse device, based on the non-contact wedge backstop of the non-contact state analysis and research, and the influence of backstop performance key parts torsion spring is analyzed with mechanics, and gives its approximate theoretical calculation method.