提出了一种用于单向螺旋传动消除丝杠螺母副反向间隙的方法 ,给出了结构原理 ,进行了理论分析和计算 ,列出了计算公式。应用表明 ,该消除螺母间隙方法结构简单、实用可靠。 A method to eliminate the backlash of screw nut with one-way screw drive is proposed. The principle of the structure is given, and the theoretical analysis and calculation are given. The calculation formulas are also given. Application shows that the method of eliminating the nut gap is simple, practical and reliable.