초록 ▼

A slip clutch assembly has a push-pull rod on link and a motor driven threaded lead screw shaft which screws in and out of a threaded bore in the push-pull rod. A plastic generally cylindrical nut is interposed between the lead screw shaft and the bore in the push-pull member. The nut has spaced apa

A slip clutch assembly has a push-pull rod on link and a motor driven threaded lead screw shaft which screws in and out of a threaded bore in the push-pull rod. A plastic generally cylindrical nut is interposed between the lead screw shaft and the bore in the push-pull member. The nut has spaced apart external rings which register in corresponding grooves in the bore in the push-pull rod. The nut has internal threads in which the lead screw turns. If the nut is prevented from moving axially by engaging the push-pull rod with a stop or load the rings on the nut slip on the grooves to prevent overload of the drive system and continued extension of the push-pull rod.

대표청구항 ▼

A slip clutch assembly for transmitting a pushing or pulling force, comprising: a force transmitting member having a bore in which there are one or more axially adjacent annular grooves concentric to the axis of said bore; a cylindrical nut on the external periphery of which there are one or more ad

A slip clutch assembly for transmitting a pushing or pulling force, comprising: a force transmitting member having a bore in which there are one or more axially adjacent annular grooves concentric to the axis of said bore; a cylindrical nut on the external periphery of which there are one or more adjacent ring elements registered in said grooves in said bore, said nut having an axially extending bore concentric with said ring elements and said bore in the nut containing an internal thread; a force transmitting lead screw shaft for being driven rotationally and having an axially extending threaded portion engaged with said internal thread of the nut; and wherein rotation of said shaft to cause it to screw in or out of the thread in said nut causing a pulling force and a pushing force, respectively, to be developed on said force transmitting member and said shaft; the friction between said force transmitting member and said nut being sufficient to prevent said nut from rotating when less than a predetermined force is applied between said member and said shaft and said nut slipping rotationally and limiting said force when said predetermined force is exceeded.