Tool holder for a power tool, particularly for a chisel hammer and/or rotary hammer
AssigneeRobert Bosch GmbH
InventorsWilly Braun, Christian Koepf
Life of this patent
Estimating the term…
Abstract
The invention relates to a tool holder for an electric tool, particularly for a chisel hammer and/or drill hammer. A tool receptacle is provided for receiving a cylindrical shaft of an insertion tool introduced through an insertion opening. The cylindrical shaft has at least two diametrically opposed detent depressions on its circumferential surface. The tool holder further has a locking device having at least one locking element, at least one blocking element and at least one restoring element. According to the invention, the locking device has at least two locking elements. Upon insertion of the cylindrical shaft of the insertion tool, the restoring element applies different forces to the locking elements of the locking device.
Claims15
A tool holder for a power tool, in particular for a chisel hammer and/or rotary hammer, comprising:
- a tool receptacle receiving a cylindrical shaft of a tool insert along a tool axis, which cylindrical shaft is introduced through an insertion opening of the tool receptacle, a circumferential surface of the cylindrical shaft provided with at least two diametrically opposed detent indentations;
- and
- a locking device that has at least two locking elements, at least one blocking element, and at least one restoring element, wherein upon insertion of the cylindrical shaft of the tool insert into the tool receptacle, the restoring element exerts different forces on the locking elements of the locking device,
- wherein the restoring element has a contact shoulder, for contact with the blocking element, and an expanded shoulder region, for creating two unequal deflection chambers for the locking elements,
- wherein the expanded shoulder region is defined by an asymmetrically shaped continuous conical surface having a continuously changing conical angle about the tool axis.
A tool holder for a power tool, in particular for a chisel hammer and/or rotary hammer, comprising:
- a tool receptacle receiving a cylindrical shaft of a tool insert along a tool axis, which cylindrical shaft is introduced through an insertion opening of the tool receptacle, a circumferential surface of the cylindrical shaft provided with at least two diametrically opposed detent indentations;
- a locking device that has at least two locking elements, at least one blocking element, and at least one restoring element, wherein upon insertion of the cylindrical shaft of the tool insert into the tool receptacle, the restoring element exerts different forces on the locking elements of the locking device,
- wherein the restoring element has a contact shoulder, for contact with the blocking element, and an expanded shoulder region, for creating two unequal deflection chambers for the locking elements, and
- wherein the expanded shoulder region is formed by at least two guide tongues separate from each other, which extend from the contact shoulder at different angles to the tool axis, in the direction of the tool axis.
Dependencies are inferred from the claim text.