Downhill speed reducer control rod for vehicle

The utility model provides an automotive downhill speed reducer control rod which comprises a rod body, at least one end of the rod body is provided with an inner taper hole, and the outer surface ofthe rod body is coated with a wear-resisting layer. Furthermore, preferably, a nitriding layer is formed on the surface of the rod body after the rod body is subjected to carburizing treatment, and the thickness of the nitriding layer is 0.8 mm-1. 2mm. And the thickness of the wear-resistant layer ranges from 0.012 mm to 0.02 mm. And the wear-resistant layer is made of a Cu-Ni-Gr alloy. And the material of the rod body is 20CrMnTi. And the taper of the inner taper hole is not less than 1: 10. And a chamfer which is not less than 3 * 60 degrees is arranged at the orifice of the inner taper hole. The technical scheme of the utility model is adopted; the wear resistance, the corrosion resistance and the surface hardness of the whole control rod are improved; when the control rod is put into the downhill speed reducer