Quick-speed device of sample-taking machine auger stem

Disclosed is a rapid device for a helix drilling rod of a sampling machine, pertaining to the sampling mechanical field of testing technology and applicable to a spiral sampling machine. The main technology of the utility model is that an axle sleeve is provided with a keyway. An out-axis of a reducer and a shaft head of the helix drilling rod are provided with the same keyway. The two keyways are provided with keys. A bearing is arranged between the axle sleeve and an axle seat. The helix drilling rod is fixed with a connecting plate with a hole provided thereon. A screw is arranged inside the hole to connect with a bottom of the axle sleeve. A top end of the axle sleeve is provided with a thread, which is provided with a nut. The favorable effects of the utility model are rapid assembly, high assembly precision, safe and reliable operation and long service life.