Drilling Tool
AssigneeRobert Bosch GmbH
InventorAlexander Volz
Life of this patent
Estimating the term…
Abstract
A drilling tool, in particular a rock drilling tool, for a portable machine tool includes a drill head, a drill shaft connected to the drill head, and a rotational axis. The drill head in one embodiment is a hard metal drill head, and the drill shaft in one embodiment is connected integrally with the drill head. The drill shaft is configured as one piece, has a guide section with guide groove winding in a spiral-shaped about the drill shaft for transporting away drilling dust, and has a securing section that is configured to detachably secure the drilling tool to a machine tool. The guide section has a diameter reinforcement at a drill head support region of the guide section neighboring the drill head.
Claims18
A drilling tool for a portable power tool, comprising:
- a drill head;
- a drill shank that is connected to the drill head;
- and
- a rotation axis,
- wherein the drill shank is configured so as to be integral and has (i) a conveying portion with a conveying groove that winds in a helical manner about the shank so as to convey away drilling dust and (ii) a fastening portion that is configured to releasably fasten the drilling tool to a power tool, and
- wherein the conveying portion on a drill head support region of the conveying portion that neighbors the drill head has a diameter reinforcement.
A method for producing a drilling tool, the method comprising:
- heating at least in portions a drill head and a drill shank of the drilling tool, the drill shank configured so as to be integral and having (i) a conveying portion with a conveying groove that winds in a helical manner about the shank so as to convey away drilling dust and (ii) a fastening portion that is configured to releasably fasten the drilling tool to a power tool, the conveying portion on a drill head support region of the conveying portion that neighbors the drill head has a diameter reinforcement;
- axially placing the drill shank and the drill head so as to connect the drill shank to the drill head;
- and
- joining the drill head and the drill shank.
Dependencies are inferred from the claim text.