Design and load deflection analysis of large capacity load ball screws

Aiming at the problem that traditional ball screws with insufficient number of payload balls are susceptible to deformation caused by load, a conservative design scheme of inner and outer double-turn large-capacity loaded ball screws is proposed, and the fabrication and installation methods are also given. The weak position (middle position) of large-capacity ballscrews were analysed for axial and radial loads and equivalent strain, and the analysis results showed that: the displacement caused by load of large-capacity ballscrews compared with that of traditional ballscrews was reduced by 66.9% in the axial direction, 37.5% in the radial direction, and the stiffness was increased by 41.5%.