초록 ▼

An overload clutch, particularly for use with manually operated drilling tools, has a release or disconnect moment adjusted at a predetermined velocity as a function of the applied torque, whereby in normal, malfunction-free operation the clutch does not release or disconnect. In the case of a malfu

An overload clutch, particularly for use with manually operated drilling tools, has a release or disconnect moment adjusted at a predetermined velocity as a function of the applied torque, whereby in normal, malfunction-free operation the clutch does not release or disconnect. In the case of a malfunction, for instance if the tool is blocked or seized, a rapid rise in the required torque occurs and the clutch, having inertia or damped by a volume change, releases or disconnects and immediately interrupts the torque transmission from the tool motor to the drilling member. A purely mechanical solution for the safe use of such drilling tools is afforded by the provision of a two-part shaft with two co-axially guided shaft parts (3, 7). A drive element (2) is engaged in positively locked manner and acts on a drive side shaft part (7) by a mobile thread or a sliding link (4), so that the drive element (2) prestresses a spring (5) depending on the applied torque.

대표청구항 ▼

An overload clutch disposed in between a driving member and a driven element for transmitting torque comprising a clutch member which is loaded by a prestressed spring, one of said driving member and said driven element comprising two shaft parts arranged coaxially and being connected for rotation b

An overload clutch disposed in between a driving member and a driven element for transmitting torque comprising a clutch member which is loaded by a prestressed spring, one of said driving member and said driven element comprising two shaft parts arranged coaxially and being connected for rotation by said clutch member as long as the transmitted torque is below a threshold value, and being rotatable relative to one another when the torque instantaneously exceeds the threshold value, said driving member comprising a drive element being connected for rotation with one of said two shaft parts and having an end face for supporting an end portion of said prestressed spring, another end portion of said prestressed spring pressing against said clutch member, said drive element being axially displaceable relative to said one shaft part as the torque transmitted by said drive element increases, thereby increasingly pressing said prestressed spring against said clutch member for raising the threshold value.