The present invention provides an automatic telescopic
geophone, which is mainly composed of a
geophone body and a
geophone tail cone. The geophone body is composed of a geophone body housing, a
servo motor, a large gear, a small gear, a support plate, and a support shaft. The
servo motor provides power for the
gear transmission, and the small gear drives the large gear to provide a large torque. The geophone
tail cone is mainly composed of a cylindrical housing, a central shaft, a bearing seat, an
impeller, a fixing pin, a latch, a telescopic auxiliary
tail cone, a guide sleeve, a tail cone sleeve, a blade-shaped tail cone, and a bearing end cover. The telescopic auxiliary tail cone of the geophone reciprocates in the
impeller through the latch, and the telescopic auxiliary tail cone is inserted into the soil under the push of the
impeller. The blade-shaped tail cone is obtained by
cutting 7 grooves. The telescopic auxiliary tail cone and the blade-shaped tail cone both increase the contact area between the tail cone and the soil, so that the
coupling effect of the geophone tail cone and the earth is better.