Last nothing point bodkin valve of motor jack hammer

The utility model discloses a last nothing point bodkin valve of motor jack hammer, the end of this needle valve is the platform, for taking tapered cylinder between the lower part of needle valve and the platform of end. The utility model discloses a needle valve and disk seat all compare easy processing and measure, and in use is difficult to make the needle valve to bend or break, have improved the life of part. 本实用新型公开了种内燃凿岩机上的无尖粗针阀，该针阀的端头为平台，针阀的下部与端头的平台之间为带锥度的圆柱体。本实用新型的针阀和阀座都比较容易加工和测量，且在使用中不容易使针阀折弯或折断，提高了零件的使用寿命。