Drill chuck and tool for rotary drilling and rotary percussion drilling
AssigneeRohm Co., Ltd.
InventorHans-Dieter Mack
Life of this patent
Estimating the term…
Abstract
A drilling device includes a drill chuck which is provided with at least two adjustable clamping jaws slightly rotatably guided in the drill chuck and including a guide surface for a tool shank of a tool. The guide surface is provided with at least one projection extending in direction of the chuck axis and engaging into a recess of the tool shank for rotating and axially limiting the play of the tool. The projection of each jaw is arranged circumferentially rearwardly offset to the mid-plane of each clamping jaw so that the guide surface is defined by a leading part which is wider than a trailing part in circumferential direction of the tool shank.
Claims18
A drilling device for rotary drilling and rotary percussion drilling, comprising:
- a drill chuck having a central axis and having at least two adjustable clamping jaws, each clamping jaw being rotatable to a limited degree within guidance constraints and a respective mid-plane extending through said axis and a respective point lying in a circumferfnetial location of each jaw whereby two portions of equal circumferential length on each jaw are located on either side of said respective point;
- and
- a tool in said chuck having a tool shank provided with at least one recess, each of said clamping jaws defining for said tool shank a guide surface which is provided with at least one projection extending towards said axis and engageable within said recess for rotating and axial play limitation of said tool, said projection extending circumferentially offset with respect to said mid-plane so that said guide surface is defined in a rotational direction of the drill chuck by a leading part and a trailing part in such a manner that in a circumferential direction of said tool shank said leading part is circumferentially longer than said trailing part.
A drill chuck for a tool for rotary drilling and rotary percussion drilling having a central chuck axis, comprising:
- at least two adjustable clamping jaws rotatable to a limited degree in their support, each of said clamping jaws having a mid-plane extending through the central chuck axis and through a point which lies in a circumfernetial location of the jaw in which two portions of each circumferential length on said jaw are located on either side of said point, said clamping jaws being provided with a guide surface which includes at least one projection engageable within a recess of a tool for rotating and axial play limitation thereof, said projection extending circumferential offset with respect to said mid-plane so that said guide surface is defined in rotational direction of the drill chuck by a leading part and a trailing part in such a manner that in circumferential direction of the tool said leading part is circumferentially longer than said trailing part.
Dependencies are inferred from the claim text.