Biopsy-taking drill

[0038] Please also refer to figure 1 , as a specific embodiment of the biopsy drill provided by the present invention, the drill rod 2 includes a connecting rod 21 and a screw rod 22 .

[0039] Connecting rod 21 is used for being connected with drilling machine. The rear end of the screw rod 22 is connected to the front end of the connecting rod 21, and the front end is connected to the drill bit 3; the rear end face of the drill bit 3, the outer wall of the screw rod 22, the front end face of the connecting rod 21 and the outer drill The cavity 4 of the helical structure is formed between the inner walls of the tube 1 .

[0040] Specifically, the connecting rod 21 may be cylindrical, and the rear end is provided with a clamping section with a square section for being clamped by the chuck of the drilling machine. The front end of the connecting rod 21 blocks the rear side of the cavity 4 . The screw rod 22 can divide the cavity 4 into a helical structure, and when the screw ro

[0055] Please also refer to figure 1 , as a specific embodiment of the biopsy drill provided by the present invention, the drill bit 3 includes a main body and a plurality of main cutting edges 32 .

[0056] The outer periphery of the main body is provided with the chip removal groove 31 . A plurality of main cutting edges 32 are arranged on the front end surface of the main body and distributed at equal angular intervals along the radial direction of the main body, and the front ends of the chip removal flutes 31 communicate with the gap between two adjacent main cutting edges 32 .

[0057] Specifically, a plurality of spiral flutes 31 are coaxially provided on the outer periphery of the main body. The front end of the main body is a pyramid with a protruding tip, and a plurality of main cutting edges 32 are respectively arranged along the side edges of the taper, so that a plurality of main cutting edges 32 are radially distributed on the front end surface of the main body wi