B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
74/19
B05B 1/16 (2006.01) B06B 1/16 (2006.01) B07B 1/42 (2006.01) B65G 27/20 (2006.01)
Patent
CA 1038650
ABSTRACT OF THE DISCLOSURE A two mass vibratory material handling apparatus has a first mass that includes a vibration exciter of the rotary eccentric weight type and a second mass that in- cludes an object to be vibrated. The two masses are inter- connected by resilient elements designed to permit a de- sired vibration amplification from the vibration exciter to the object to be vibrated. The vibration exciter has a drive with an adjustable drive ratio located between a fixed r.p.m. at full voltage motor drive shaft and a shaft that rotatably supports eccentric weights. Variable pitch pulleys or a set of pulleys having various pitch diameters are provided so that pitch diameters can be selected there- from for mounting one pulley on each shaft with a drive belt trained about the pulleys and thus, provide a drive ratio enabling the fixed frequency motor to drive the ec- centric weights at a selected operating frequency. The resilient elements can be designed to amplify vibration along a predetermined line of attack or to flex in that direction while amplifying vibration perpendicularly there- to or to provide a combination of such vibration amplifica- tions to impart an elliptical motion to the second mass. The apparatus can be manufactured without undue care in maintaining a designed spring rate for the resilient ele- ments or maintaining the designed weight of the two masses since after manufacture and assembly, the apparatus can be fine tuned by weighing the two masses, measuring the ampli- tude of vibration of the mass including the object to be vibrated at a known frequency, selecting an operating fre- quency for obtaining a desired vibration stroke, and adjust- ing the drive ratio to operate at that frequency. -1a-
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