Non-resonant cyclic drive system employing rectification of the cyclic output

摘要

A vibratory drive system for use in spalling a road surface, cutting rock, etc. Vibratory energy is generated by means of an orbiting mass oscillator, the output of which is rectified by means of a rectifier to provide unidirectional pulses to a cutting tool. In the interests of making the system compact and providing controlled operational parameters, non-resonant operation is employed, optimum drive to the tool being achieved by biasing the oscillator against the tool and by providing a shoulder which fixes the uppermost position of the tool when it is being biased against a load. The tool position and the design of the oscillator are such that the oscillator housing contacts the tool near the mid-down stroke (90°) of the oscillatory vibration cycle, this being the point of highest vibratory velocity and kinetic energy. In this manner, the highest possible delivery of energy to the tool is provided.