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US 11,518,015 B2Granted
Switching device for a hammer drill and hammer drill comprising a switching device
AssigneeRobert Bosch GmbH
InventorsJanos Rakaczki, Thomas Duerr, Carla-Maria Finck, Ulrich Bohne, Andras Markovics
Life of this patent
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Abstract
The disclosure relates to a switching device for a hammer drill, having a manually actuatable switching element. It is proposed that the switching element is designed for actuating an operational mode switching unit and a switching unit for changing the direction of rotation.
Claims14
A switchover device for a hammer drill, comprising:
- an operating-mode switchover unit;
- a rotational-direction switchover unit;
- and
- a manually actuatable switchover element, configured to actuate the operating-mode switchover unit and the rotational-direction switchover unit,
- wherein the switchover element is rotatably mounted such that manual actuation of the switchover element rotates the switchover element about a switchover axis of the switchover element that is aligned with a direction of a work axis of the hammer drill,
- wherein the switchover element has a switching device configured to actuate a switching element of the operating-mode switchover unit,
- wherein the switching element of the operating-mode switchover unit is arranged in a transmission space of the hammer drill, in which a transmission unit of the hammer drill is arranged, and
- wherein the switching element is arranged in a receiving recess, and a sealing ring is arranged in the receiving recess so as to seal the switching element against the receiving recess and avoid the escape of lubricant from the transmission space via the receiving recess.
5 more elements
A hammer drill comprising:
- a switchover device comprising:
- an operating mode switchover unit;
- a rotational-direction switchover unit;
- and
- a manually actuatable switchover element configured to actuate the operating-mode switchover unit and the rotational-direction switchover unit;
- a housing, in which an electric motor and a transmission unit are arranged,
- wherein a rotational drive motion of the electric motor is transmitted to a motor shaft that is connected to an intermediate shaft to transmit torque, the intermediate shaft being connected to an output shaft and a percussion-mechanism unit so as to transmit torque,
- wherein the switchover element is rotatably mounted such that manual actuation of the switchover element rotates the switchover element about a switchover axis of the switchover element that is aligned with a direction of a work axis of the hammer drill,
- wherein the switchover element has a switching device configured to actuate a switching element of the operating-mode switchover unit,
- wherein the switching element of the operating-mode switchover unit is arranged in a transmission space of the hammer drill, in which a transmission unit of the hammer drill is arranged, and
- wherein the switching element is arranged in a receiving recess, and a sealing ring is arranged in the receiving recess so as to seal the switching element against the receiving recess and avoid the escape of lubricant from the transmission space via the receiving recess.
8 more elements
Dependencies are inferred from the claim text.