Choice of gear ratio when designing a wedge breechblock for the artillery piece

Abstract

According to analysis of the wedge breechlock design, dependences are obtained for a gear ratio that links the displacements of an extractor and wedge breechblock. It is shown, that the maximum value of the gear ratio depending on geometry of slot’s profiles in a wedge breechblock and automatic cocking is i₁ ≈ 1,6. Choosing the design data of the breechblock mechanism allows changing the gear ratio i₂ additionally within limits from 0,5 to 4,0.