초록 ▼

An adjustable brake for a conveyor roller formed of a tube mounted upon a coaxial shaft extending through a support hub includes a resilient washer-like pad on the end face of the roller, a similar pad on the adjacent hub face and a series of balls compressed between the pads. The end of the shaft e

An adjustable brake for a conveyor roller formed of a tube mounted upon a coaxial shaft extending through a support hub includes a resilient washer-like pad on the end face of the roller, a similar pad on the adjacent hub face and a series of balls compressed between the pads. The end of the shaft extends outwardly of the hub, through a conveyor support rail, and threadedly engages a nut. Adjustment of the nut adjustably presses the support hub towards the roller end to adjustably squeeze the balls between the rings. The balls resiliently compress the portions of the rings that they contact to embed into the ring surfaces and form momentary depressed sockets in the ring surfaces. Rotation of the roller relative to the support hub causes rotation of the balls and corresponding displacements of the depressed sockets which produces resilient resistive forces upon the balls to retard the speed of rotation of the roller.

대표청구항 ▼

An adjustable roller brake for retarding the speed of axial rotation of a conveyor roller comprising: a ring-washer shaped roller pad positioned upon a face of one end of the roller, with the pad being coaxial with the roller; a support hub having a transverse face parallel to and spaced a short dis

An adjustable roller brake for retarding the speed of axial rotation of a conveyor roller comprising: a ring-washer shaped roller pad positioned upon a face of one end of the roller, with the pad being coaxial with the roller; a support hub having a transverse face parallel to and spaced a short distance apart from said roller face, and with the roller and support hub being relatively rotatable; a ring-washer shaped hub pad positioned upon said transverse face, coaxial with the roller and parallel to, but spaced from, the roller pad; said pads being formed of resiliently depressable plastic material; a series of bearing elements arranged between, and in contact with, the pads and a retainer holding the elements in angularly spaced apart relationship coaxially of the roller; adjustable pressure means for pressing the roller and hub faces together and holding said faces in selectively determined spaced apart relationship so that the bearing elements are squeezed between and are normally partially imbedded within the pads which resiliently compress to received the elements in momentarily formed socket-like depressions; whereby relative rotation of the roller and support hub causes the bearing elements to traverse the pads in a circular path, which is coaxial with the roller, and the locations of the momentary socket-like depressions in the pads continually change with the movement of the embedded bearing elements so as to exert a resistive force upon the bearing elements which retard their rotation around the roller axes and thereby, retard rotation of the roller, and with the amount of retardation of the roller being controlled by the adjustment of the pressure means.