Hand-held power tool with torque limiter
AssigneeRobert Bosch GmbH
InventorBruno Aeberhard
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Abstract
The invention relates to a hand tool machine with a torque limiter (2) enabling a user to set a maximum torque which is transmitted by a motor drive (4) to a tool carrier (6). According to the invention, the hand tool machine comprises an overload clutch which interrupts a power flux between the motor drive (4) and the tool carrier (6) when the transmitted torque exceeds the overload torque.
Claims10
A hand-held power tool having a torque limiter (2), with which a maximum torque, which is transmitted from a motor power takeoff (4) to a tool driver (6), is adjustable by a user, characterized by an overhead coupling, which interrupts a flow of force between the motor power takeoff (4) and the tool driver (6) when the transmitted torque exceeds an overload torque.
The hand-held power tool as defined by one of the foregoing claims, characterized in that the overhead coupling includes an element which is an element of a planetary gear.
The hand-held power tool as defined by one of the foregoing claims, characterized in that the torque limiter (2) and the overhead coupling include a common element.
The hand-held power tool as defined by one of the foregoing claims, characterized in that the torque limiter (2) and the overhead coupling include spring elements (24) that act in the same direction.
The hand-held power tool as defined by one of the foregoing claims, characterized in that the torque limiter (2) includes an adjusting element with a control cam (82), which has a first segment (90) for adjusting the maximum torque and a second segment (92, 94), different in its control action from the first, for adjusting a drilling mode without adjustable torque limitation.
The hand-held power tool as defined by one of the foregoing claims, characterized in that the overhead coupling has a packet (56) with a plurality of elements and with a prestressed spring element, and the initial tension is retained inside the packet (56).
Dependencies are inferred from the claim text.