Adaptable safety clutch

Details Adaptable safety clutch Adaptable safety clutch

1995-07-13

1997-04-01

Lorence, Richard M.

Rotary shafts, gudgeons, housings, and flexible couplings for ro

Overload release coupling

Torque transmitted via a ball

192 561, F16D 710

Patent

active

056160801

ABSTRACT:
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.

REFERENCES:
patent: 3442360 (1969-05-01), Fulop
patent: 3552147 (1971-01-01), Johansson et al.
patent: 3827260 (1974-08-01), Kato
patent: 4041729 (1977-08-01), Bilz
patent: 4272973 (1981-06-01), Fu-Tsai
patent: 4694944 (1987-09-01), Schmidt

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