Electrical tool with a quick-action clamping device
AssigneeHilti Aktiengesellschaft
InventorsMarkus Hartmann, Stefan Dorner
Life of this patent
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Abstract
An electrical tool including a hollow spindle (2) for supporting a working tool (3) and a quick-action device for clamping the working tool (3) with respect to the hollow spindle (2) and having a clamping spindle (4) arranged in the hollow spindle (2) with a possibility of an axial displacement relative thereto, an elastic member (5) for biasing the clamping spindle (4) into its clamping position, an actuation device for displacing the clamping spindle into its exchange position, and a compensator for interrupting the action of the elastic member (5) on the clamping spindle (4) at least in the exchange position of the clamping spindle.
Claims11
An electrical tool, comprising a housing (1);
- a motor-driven hollow spindle (2) for supporting a working tool (3) and located in the housing (1);
- and a quick-action device for clamping the working tool (3) with respect to the hollow spindle (2), the quick-action clamping device having a clamping spindle (4) arranged in the hollow spindle (2) with a possibility of an axial displacement relative thereto, an elastic member (5) for biasing the clamping spindle (4) into a clamping position thereof, in which the working tool is clamped between a clamping flange (7) provided on a working tool-side end of the clamping spindle (4) and the hollow spindle (2), actuation means (24) for displacing the clamping spindle (4) against the biasing force of the elastic member (5) into an exchange position thereof, in which the working tool (3) is released, and a compensator (15) for interrupting action of the elastic member (5) on the clamping spindle (4) at least in the exchange position of the clamping spindle.
A quick-action clamping device for a power tool having a hollow spindle (2) for supporting a working tool (3), the quick-action clamping device comprising a clamping spindle (4) arranged in the hollow spindle (2) with a possibility of an axial displacement relative thereto, an elastic member (5) for biasing the clamping spindle (4) into a clamping position thereof, in which the working tool is clamped between a clamping flange (7) provided on a working tool-side end of the clamping spindle (4) and the hollow spindle (2), actuation means (24) for displacing the clamping spindle (4) against the biasing force of the elastic member and into an exchange position thereof, in which the working tool (3) is released, and a compensator (15) for interrupting action of the elastic member (5) on the clamping spindle (4) at least in the exchange position thereof.
Dependencies are inferred from the claim text.