Adjustable breakaway clutch

Details Adjustable breakaway clutch Adjustable breakaway clutch

B - Operations, Transporting

25

J

B25J 15/04 (2006.01) B25J 19/06 (2006.01) F16D 7/02 (2006.01) F16D 43/21 (2006.01)

Patent

CA 2541598

The invention is an adjustable overload-sensitive, breakaway clutch interposed between a robot arm and any attached end-of-arm tool that can sense the operating load of said tool and disengage the clutch when an overload condition arises and send a signal to shut down the robot. The breakaway trip point for any given robotic task is mechanically pre-determined and pre- set via an integrated, threaded adjustment cup, or springs of variable tensile strength, or shim spacers, or any combination thereof. It is the semispherical design of the adjustment cup, the spring holder, the stud member and the set-up choices inherent in the design, that permit the breakaway trip point to be set over a wide range, to a fine degree of tolerances and to be mechanically stable at high operating speeds. The design has only one home position, so when the clutch is reset after an overload condition, it cannot be mistakenly reset to an improper start point. Additionally, a variation of the present invention incorporates the tool cabling within the clutch assembly. The variation of housing the tool cables within the clutch assembly results in a clean design that reduces the operating envelope required for any tool using said clutch, thus improving tool maneuverability and increasing the life expectancy of the cables. Additionally, it renders great mechanical stability of the clutch over all operating speeds; most importantly, at high operating speeds.

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