Drill bit of a ground drilling device with an enlargement of a receptacle for fastening an attachment thereto and method for producing same
AssigneeTRACTO-TECHNIK GmbH & Co. KG
InventorFranz-Josef Püttmann
Life of this patent
Estimating the term…
Abstract
A drill head of a ground drilling device includes a drill bit and an attachment which can be fastened to the drill bit, wherein at least one dowel pin is provided for holding the attachment on the drill bit, and the drill bit has one or more receptacles for a dowel pin, wherein the receptacle is enlarged with respect to the radius of the dowel pin.
Claims6
A drill bit of a ground drilling device that is a ram drilling device, the drill bit being adapted to receive an attachment fastened to the drill bit, the drill bit comprising:
- a drill bit receptacle, wherein the attachment comprises an attachment receptacle and each of the drill bit receptacle and the attachment receptacle extends transversely to a longitudinal direction of the drill bit and the attachment, respectively, for inserting a dowel pin to fasten the attachment to the drill bit;
- and
- an enlargement of the drill bit receptacle with respect to a radius of the dowel pin, wherein the enlargement of the drill bit receptacle is in a straight line that is inclined with respect to the longitudinal direction of the drill bit by an angle between 5° and 20°.
A method for producing a drill bit of a ground drilling device that is a ram drilling device, comprising:
- providing the drill bit with a drill bit receptacle, the drill bit being adapted to receive an attachment fastened to the drill bit, wherein the attachment is fastened to the drill bit by means of at least one dowel pin inserted into the drill bit receptacle and an attachment receptacle of the attachment;
- and
- providing an enlargement of the drill bit receptacle with respect to a radius of the dowel pin, wherein the enlargement of the drill bit receptacle is in a straight line that is inclined with respect to a longitudinal direction of the drill bit by an angle between 5° and 20°.
A ground drilling device that is a ram drilling device, comprising:
- a drill bit having a drill bit receptacle;
- and
- an attachment fastened to the drill bit, said attachment having an attachment receptacle,
- wherein the attachment is fastened to the drill bit by means of at least one dowel pin inserted into the drill bit receptacle and the attachment receptacle,
- wherein the drill bit receptacle is enlarged with respect to a radius of the dowel pin, and
- wherein the enlargement of the drill bit receptacle is a straight line that is inclined with respect to a longitudinal direction of the drill bit by an angle between 5° and 20°.
Dependencies are inferred from the claim text.