Hand-held power tool

A hand-held power tool, comprising:

• a gear housing with a gear for transmitting a torque, generated by a drive motor, to a spindle that rotates about a rotation axis and defines an axial direction;
• and
• a housing-side interface element, the gear housing being exchangeably connectable to a tool attachment via the housing-side interface element in such a way that a torque is transmitted from the spindle to an input spindle of the tool attachment, the housing-side interface element including a flange ring that is connected to the gear housing in a torsionally stiff manner, and the housing-side interface element corresponding to a tool attachment-side interface element which includes a fastening ring that is rotatably supported on the tool attachment, the fastening ring being brought into engagement with the flange ring by a coupled rotatory and axial relative movement of the fastening ring with respect to the flange ring in such a way that the fastening ring and the flange ring together form a bayonet-type connector,
• wherein the tool attachment-side interface element also includes a detent ring, the bayonet-type connector being locked by rotating the fastening ring with respect to the detent ring,
• wherein the flange ring has at least one beveled undercut that extends in a circumferential direction of the flange ring and has a variable slope, at least one corresponding undercut element on the fastening ring engaging with the undercut in the manner of a bayonet joint when the bayonet-type connector is set up, and when a rotation of the fastening ring is applied, the undercut element being guided along the slope of the beveled undercut in such a way that an axial motion component of the fastening ring with respect to the flange ring is brought about in a first defined angular range of the rotation.

A tool attachment for exchangeable connection to a hand-held power tool, comprising:

• a tool attachment-side interface element that is exchangeably connectable to a housing-side interface element, the tool attachment-side interface element including a fastening ring that is rotatably supported on the tool attachment, wherein the fastening ring is brought into engagement with the housing-side interface element by a coupled rotatory and axial relative movement of the fastening ring with respect to the housing-side interface element in such a way that the fastening ring and the housing-side interface element together form a bayonet-type connector,
• wherein the tool attachment-side interface element includes a detent ring, the bayonet-type connector being lockable by rotating the fastening ring with respect to the detent ring,
• wherein an indicating device is provided on the tool attachment, which indicates unlocked and locked locking states of the bayonet-type connector, regardless of the tool attachment used, regardless of the angular position of the tool attachment with respect to the gear housing, and regardless of the angular position of the indicating device of the tool attachment with respect to a remainder of the tool attachment,
• wherein the indicating device includes a first indicating notch and a second indicating notch in the locking ring, and a first symbol on the detent ring which is visible through the center of the first indicating notch only when a detent element of the fastening ring is engaged with a first recess, and which is visible through the center of the second indicating notch only when the detent element of the fastening ring is engaged with a second recess.

A tool attachment for exchangeable connection to a hand-held power tool, comprising:

• a tool attachment-side interface element that is exchangeably connectable to a housing-side interface element, the tool attachment-side interface element including a fastening ring that is rotatably supported on the tool attachment, wherein the fastening ring is brought into engagement with the housing-side interface element by a coupled rotatory and axial relative movement of the fastening ring with respect to the housing-side interface element in such a way that the fastening ring and the housing-side interface element together form a bayonet-type connector,
• wherein the tool attachment-side interface element includes a detent ring, the bayonet-type connector being lockable by rotating the fastening ring with respect to the detent ring,
• wherein an indicating device is provided on the tool attachment, which indicates unlocked and locked locking states of the bayonet-type connector, regardless of the tool attachment used, regardless of the angular position of the tool attachment with respect to the gear housing, and regardless of the angular position of the indicating device of the tool attachment with respect to a remainder of the tool attachment,
• wherein the indicating device includes a first indicating notch in the locking ring, and a first symbol and a second symbol on the detent ring, the first symbol being visible through the center of the first indicating notch only when a detent element of the fastening ring is engaged with a first recess, and the second symbol being visible through the center of the first indicating notch only when the detent element of the fastening ring is engaged with a second recess.

A tool system, comprising:

• a hand-held power tool including a gear housing with a gear for transmitting a torque, generated by a drive motor, to a spindle that rotates about a rotation axis, the spindle defining an axial direction, the gear housing being exchangeably connectable to a tool attachment via an interface in such a way that a torque is transmitted from the spindle to an input spindle of the tool attachment, the interface including a housing-side interface element with a flange ring, the flange ring being connected to the gear housing in a torsionally stiff manner, and the housing-side interface element corresponding to a tool attachment-side interface element which includes a fastening ring that is rotatably supported on the tool attachment, the fastening ring being brought into engagement with the flange ring by a coupled rotatory and axial relative movement of the fastening ring with respect to the flange ring in such a way that the fastening ring and the flange ring together form a bayonet-type connector;
• and
• the tool attachment,
• wherein the flange ring has at least one beveled undercut that extends in a circumferential direction of the flange ring and has a variable slope.