Patent ID: 11964352
Assignee: ROBERT BOSCH GMBH
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 12:
13. An accessory drivable by a driving shaft, the accessory comprising:
an attachment member including (a) an inner region including a surface having (i) a first protruding structure that protrudes outward from the surface on a first side of the attachment member in a first direction and defines a locking slot that is offset from a central axis of the attachment member and (ii) a second protruding structure that protrudes outward from the surface in the first direction and defines a guide slot that is offset from the central axis of the attachment member, the central axis being perpendicular to the surface of the attachment member and (b) an outer region including the surface that extends from the inner region to an edge of the attachment member;
an attachment configured to engage with a work piece, the attachment being detachably attachable to a second side of the attachment member;
a fastener;
a locking member movable into at least (a) a locked position in which the locking member is engaged with the locking slot of the attachment member such that the attachment member is configured to rotate about the central axis, and (b) an unlocked position in which the locking member is disengaged from the locking slot of the attachment member such that the attachment member is configured to rotate about an eccentric axis, the eccentric axis being offset from the central axis; and
an eccentric member having a first side surface and a second side surface, the eccentric member including (a) a first slot defined as a through-hole from the first side surface to the second side surface, the first slot being structured to receive the locking member at least along a first axis that is central to the first slot, (b) a second slot to receive the driving shaft at least along a second axis that is central to the second slot, and (c) a third slot defined from the first side surface to the second side surface, the third slot being structured to receive the fastener at least along a third axis that is central to the third slot, the third slot being positioned such that a distance between the third axis and the first axis is greater than another distance between the second axis and the first axis,
wherein
the fastener extends through the guide slot of the attachment member and the third slot of the eccentric member to provide a secure connection between the attachment member and the eccentric member along the eccentric axis, and
the locking member is movable into the locked position and the unlocked position along an axis that is parallel to the central axis.