Hydraulic device of deep hole drill carriage for coal mine

The utility model relates to the technical field of coal mine drill carriages, and discloses a hydraulic device of a deep hole drill carriage for a coal mine, which comprises a cavity, an ejection mechanism and a locking mechanism, the ejection mechanism comprises a piston in sliding connection with the inner wall of the cavity, a driving motor is arranged on the side, away from the bottom of the cavity, of the piston, an output shaft of the driving motor is fixedly connected with a first bevel gear, the first bevel gear is in meshed connection with a second bevel gear, the second bevel gear is fixedly connected with one side of a lead screw, and the end of the lead screw is rotationally connected with the piston; the locking mechanism comprises a cross beam arranged at the top of the cavity, cylinders are arranged on the two sides of the cross beam, and piston rods of the cylinders face the center of the cavity and are fixedly connected with ejector rods. According to the hydraulic device of the deep hole dr