ねじ本体とねじ山の弾性変形を考慮したポールねじの剛性 : 第2報,予圧ダブルナットの場合

概要

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The stiffness in the axial direction a preloaded ball screw constructed from a double nut is calculated considering the elastic deformation of the screw shaft, the nut itself, and the screw thread, in addition to deformation due to Hertzian contact. The basic equations derived here could be applied in many cases to preloading methods and the various states of an externally applied load. Moreover, the calculation can be carried out both for single and double circuit nuts. The calculated stiffness is low compared with the one obtained when Hertzian contact alone is considered. The difference between the two calculated values becomes large as the spacing disc rigidity increases. The externally applied load which releases a preload decreases at a higher rigidity of the spacing disc than the one calculated according to Hertzian contact. The calculated values of both the stiffness and the releasing load approximately agree with the experimental results.
一般社団法人日本機械学会の論文
1989-07-25