| 摘要 |
The drill positioning device includes a sleeve cylinder 1 with an axial through hole 11. Axially extended limiting blocks 12 are formed on the inner wall of the sleeve cylinder. The sleeve cylinder has a positioning base 2 with limiting grooves 21 corresponding to the limiting blocks 12. The positioning base is free to slide along the axial direction in the sleeve cylinder through hole. In a through hole 22, the positioning base accommodates a bearing 3 having an outer ring 31 and a rotatable inner ring 32. The inner ring is formed with a positioning hole 321 in the axial direction. A ring sleeve 4 is disposed in the positioning hole of the bearing and has a ring hole 41 for an aiming element 5 or a drill bit (7, Figure 5) of a drilling machine to go through. The aiming element may be an axially hollow cylinder for a user to view downward from a top end. Suckers 14 may be used for fixing the device to a work plane. The bottom of the sleeve cylinder may also have a sealing ring (13, Figure 3). |
