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系统地论证了“三排钢珠式”升力机构的每排可容最多及最少钢珠致(Z_(max)、Z_(min))与轴径(r_S)、珠径(r)比(K=r_(S/r))之间的数值关系;推导出了该机构的升力比计算公式;并用电算所得数据对此种机构的轴径、珠径及每排珠数等参数及升力比做了曲线描述,本文得出如下结论:(1)当 K为常数时,每排珠数应取可取范围的最多值Z_(max);(2)当取Z=Z_(max)时,K值应取可取范围的最小值;(3)此种机构在常用数值范围内不会发生自锁,无须采取防自锁措施;(4)拨动器内锥孔与小孔径交界处宜加过渡圆弧。
It is demonstrated systematically that the ratio of the maximum diameter and the minimum diameter of the steel balls (Z max, Z min) to the axial diameter (r_S) and the bead diameter (r) (K = r_ (S / r)). The formula for calculating the lift ratio of the mechanism is deduced. The parameters such as the shaft diameter, the bead diameter and the number of rows per bead and the lift ratio In the curve description, the following conclusions are obtained: (1) When K is constant, the maximum value Z_ (max) for each row of beads should be taken; (2) When Z = Z_max, Should take the minimum desirable range; (3) Such institutions in the common numerical range does not occur self-locking, no need to take anti-self-locking measures; (4) arc.