The invention discloses a
drill rod centering adjuster. The
drill rod centering adjuster comprises a first adjuster fixed plate, a second adjuster fixed plate, a lead screw, a guide rod, a left V-shaped opening
assembly, a right V-shaped opening
assembly, a
coupling and a
hydraulic motor, wherein a guide rod and a lead screw are arranged in parallel between the first adjuster fixed plate and the second adjuster fixed plate, the two ends of the guide rod are fixed on a guide rod seats of the first adjuster fixed plate and the second adjuster fixed seat, the two ends of the lead screw are mounted on the rolling bearings of the first adjuster fixed plate and the second adjuster fixed plate, one end of the left V-shaped opening
assembly sleeves the guide rod, while the other end of the left V-shaped opening assembly is in threaded connection with the lead screw, one end of the right V-shaped opening assembly sleeves the guide rod, while the other end of the right V-shaped opening assembly is in threaded connection with the lead screw, the V-shaped openings of the left V-shaped opening assembly and the right V-shaped opening assembly are opposite to each other, and one end of the
coupling is connected with the lead screw, while the other end of the
coupling is connected with the rotating shaft of a
hydraulic motor. The
drill rod centering adjuster is small in appearance, and simple and reliable in structure; the
diameter range of drill rods which can be centered and adjusted by the drill rod centering adjuster is large, and the drill rod centering adjuster is controlled hydraulically; besides, the drill rod centering adjuster is easy to process and manufacture.