Device for measuring conical surface runout degree of engine cylinder cover valve seat

The utility model discloses a device for measuring the conical surface runout degree of an engine cylinder cover valve seat, which comprises a gauge stand, a positioning shaft, a dial gauge, a needle measuring head and a fastening screw, wherein the gauge stand is provided with a fastening threaded hole, one end of the positioning shaft is connected with the gauge stand, one end of the needle measuring head is connected with a measuring head end of the dial gauge, and the fastening screw is used for fixing the measuring head end. The dial gauge is further provided with a dial gauge mounting through-hole whose axis is perpendicular to the conical surface of the engine cylinder cover valve seat. The measuring head end and the needle measuring head are both located in the dial gauge mounting through-hole, and the fastening screw is located in the fastening threaded hole. The device disclosed by the utility model has the characteristics of simple structure, convenient use, rapidness, efficiency, accurate measurement, and low production cost and maintenance cost.