采煤机外牵引花键轴是联接采煤机外牵引和内牵引的关键零件,主要起传递扭矩的作用[1]。其使用效果将直接影响外牵引的性能,特别是对于大功率电牵引采煤机,其影响尤为突出。因此,针对外牵引花键轴结构和定位方式进行攻关研究,对提高外牵引的可靠性和使用寿命具有事半功倍的效果。 Shearer outside the spline shaft traction shearer traction and internal traction key components, mainly from the role of torque transmission [1]. Its use effect will directly affect the performance of the external traction, especially for high-power electric traction shearer, the impact is particularly prominent. Therefore, the research on the structure and positioning of the external traction spline shaft is of great effect to improve the reliability and service life of external traction.