A rock drilling head (1) with a drilling diameter (D) between 25 mm and 60 mm and formed of no more than five separate parts, has at least one rinsing channel (2) formed in the outer surface (3) of the drilling head and expanding from the outer surface (3) inward in form of a nozzle, the rinsing channel having a diameter (S) amounting to between 1/20 and ⅕ of the drilling diameter (D).
Description
BRIEF DESCRIPTION OF THE DRAWINGS
The drawings show:
FIG. 1 a longitudinal cross-sectional view of a rock drilling head according to the present invention along line I-I in FIG. 2 in three planes; and
FIG. 2 a plan view of the rock drilling head according to the present invention.
Claims
1. A rock drilling head having a drilling diameter (D) between 25 mm and 60 mm and formed of no more than five separate parts, comprising an outer surface (3); and at least one rinsing channel (2) formed in the outer surface (3) and expanding from the outer surface (3) inward in form of a nozzle, and having a diameter (S) amounting to between 1/20 and ⅕ of the drilling diameter (D).
2. A rock drilling head according to claim 1, wherein the rinsing channel (2) expands with a cone angle (α) between 3° and 30°.
3. A rock drilling head according to claim 1, comprising a further rinsing channel (2).
4. A rock drilling head according to claim 1, comprising a base member (4).
5. A rock drilling head according to claim 4, wherein the base member (4) is formed as a steel casting.
6. A rock drilling head according to claim 4, further comprising a hard material insert (5) extending diametrically over the drilling diameter (D) and secured in a groove (6) formed in the base member (4).
7. A rock drilling head according to claim 1, comprising only one base member (4), and only one hard material insert (5) extending diametrically over the drilling diameter (D) and secured in a groove (6) formed in the one base member (4).
Patent Application
20070193784
