Tool holder for a rotary hammer
OwnerEugen Hild, Ulrich Bohneinventors
Life of this patent
Estimating the term…
Abstract
A tool holder for a hand-guided drilling device, in particular for a rotary hammer, includes a receiving sleeve that is designed as a single piece and that is drivable in a rotating manner for a shank part of an insertion tool. The recess is open at both end faces and limited therebetween by an inner circumferential surface of the receiving sleeve. The inner circumferential surface (62) of the receiving sleeve (34) includes at least six flat circumferential surface sections (62n through 62u; 84, 86) in the circumferential direction, with adjacent circumferential surface sections (62n, 620; 62p, 62q; 62r 62s; 62t, 62u) forming an angle of 120 degrees.
Claims9
A tool holder for a rotary hammer, comprising:
- a receiving sleeve formed as a single piece and that is drivable in a rotating manner, for a shank part of an insertion tool, a recess being open at both end faces and being bounded therebetween by an inner circumferential surface of the receiving sleeve,
- wherein the inner circumferential surface (62) of the receiving sleeve (34) includes at least six flat circumferential surface sections (62n through 62u;
- 84, 86) in the circumferential direction, with adjacent circumferential surface sections (62n, 62o;
- 62p, 62q;
- 62r 62s;
- 62t, 62u) forming an angle of 120 degrees, and wherein the inner circumferential surface (62) of the receiving sleeve (34) bounds at least one rotationally driving groove (66, 68) that is parallel to the rotation axis (64) of the receiving sleeve (34) for a shank part (16) with a circular cross section and at least one overhanging rotationally driving segment (28, 30).
A rotary hammer, comprising:
- a tool holder (2), said tool holder (2) comprising a receiving sleeve formed as a single piece and that is drivable in a rotating manner, for a shank part of an insertion tool, a recess being open at both end faces and being bounded therebetween by an inner circumferential surface of the receiving sleeve, wherein the inner circumferential surface (62) of the receiving sleeve (34) includes at least six flat circumferential surface sections (62n through 62u;
- 84, 86) in the circumferential direction, with adjacent circumferential surface sections (62n, 62o;
- 62p, 62q;
- 62r 62s;
- 62t, 62u) forming an angle of 120 degrees.
Dependencies are inferred from the claim text.