Coal mine automatic directional drill

A coal mine automatic directional drill, comprising a moving platform, a machine frame, a clamper, a main manipulator, a power head, a drill pipe storage system, a control system and a hydraulic system, wherein the machine frame, the drill pipe storage system, the control system, the hydraulic system and the main manipulator are installed on the moving platform, the clamper and the power head are installed on both ends of the machine frame, respectively, the power head comprises a main motor, a gearbox and a main shaft, the gearbox is provided with a driving shaft, one end of the driving shaft is connected with the main motor, and the driving shaft is engaged with the main shaft through a gear in the gearbox;

• the present invention is characterized in that:
• the other end of the driving shaft is connected with an angle adjuster through the gearbox;
• the angle adjuster comprises a transmission shaft, a fixed toothed disk, a moving toothed disk, a rotary seat and a rotary speed reducer with a self-locking function, one end of the transmission shaft is circumferentially and fixedly connected with the driving shaft, the fixed toothed disk and the moving toothed disk are sheathed on the transmission shaft, the fixed toothed disk is engaged with the moving toothed disk through skewed teeth, the fixed toothed disk is circumferentially and fixedly connected with the transmission shaft, the moving toothed disk is rotationally connected with the transmission shaft, and the moving toothed disk can slide along an axial direction of the transmission shaft;
• the rotary seat is sheathed on and circumferentially and fixedly connected with the moving toothed disk, and an output disk of the rotary speed reducer is coaxially and fixedly connected with the rotary seat to transfer rotation of the output disk of the rotary speed reducer to the moving toothed disk;
• wherein the angle adjuster also comprises a driving piston and an adjuster connecting seat, the driving piston is sheathed on the transmission shaft and is located on one side of the fixed toothed disk away from the moving toothed disk, and one end of the driving piston away from the driving shaft is connected with the moving toothed disk;
• wherein the adjuster connecting seat is sheathed on the driving piston;
• an inner diameter of the adjuster connecting seat is divided by three apertures, wherein the apertures of two sections away from the gearbox are matched with an outer diameter of the driving piston, and the two sections are sheathed on the driving piston;
• the driving piston is a two-stage stepped shaft, a sealing groove is formed in an outer circle of a small-diameter end of the driving piston, a sealing ring is installed in the sealing groove and is matched with a corresponding position of the adjuster connecting seat sheathed on the driving piston to form a first seal, an outer circle of a large-diameter end is matched with a sealing ring installed at a corresponding position of the adjuster connecting seat to form a second seal, a sealing cavity located between the driving piston and the adjuster connecting seat is formed between the first seal and the second seal, an oil inlet communicated with the sealing cavity is provided on the adjuster connecting seat, and the moving toothed disk is pushed by the driving piston to move in a direction away from the fixed toothed disk under the action of hydraulic oil entering the sealing cavity through the oil inlet to enable the moving toothed disk to slide along the axial direction of the transmission shaft.