Novel structure of transmission shaft splined hub pre-forged piece

A novel structure of a transmission shaft splined hub pre-forged piece comprises a rod portion and a head portion which share the same center line, the rod portion and the head portion are of an integrated structure, the head portion is located at the right end of the rod portion, the rod portion is of a cylinder structure, the inner circle of the head portion is an inner conical surface with the thin left and the thick right, and the outer circle of the head portion comprises an outer conical section on the left side and a cylindrical section on the right side. The outer diameter of the cylindrical section is equal to that of the thicker end of the right end of the outer conical section. Practice proves that the rejection rate is obviously reduced after pre-forging forming in a workshop; the die service life is prolonged; the production efficiency is improved by more than two times. 传动轴花键毂预锻件新结构，包括具有同一中心线的杆部和头部，杆部与头部为一体结构，头部位于杆部右端，杆部为圆筒体结构，头部内圆为左细右粗的内圆锥面，头部外圆包括左侧的外圆锥段和右侧的圆柱段，外圆锥段左细右粗，圆柱段外径与外圆锥段右端较粗端外径相等。本实用新