Tool holder for a rotary hammer
AssigneeRobert Bosch GmbH
InventorsEugen Hild, Ulrich Bohne
Life of this patent
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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 in particular 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, 62o; 62p, 62q; 62r 62s; 62t, 62u) forming an angle of 120 degrees.
Claims2
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,
- wherein the inner circumferential surface (62) of the receiving sleeve (34) includes six rotationally driving ridges (80) for a shank part with a Torx profile that are parallel to the receiving sleeve (34) and are located at identical angular distances, and wherein the rotationally driving ridges (80) are each located between two adjacent, flat, separated circumferential surface sections (84).
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,
- wherein the inner circumferential surface (62) of the receiving sleeve (34) includes six rotationally driving ridges (80) for a shank part with a Torx profile that are parallel to the receiving sleeve (34) and are located at identical angular distances, and wherein the rotationally driving ridges (80) are each located between two pair of adjacent, flat circumferential surface sections (86).
Dependencies are inferred from the claim text.