Vibrationsgenerator.

摘要

A vibration generator comprises a first rotational shaft 21 and second rotational shaft 22 with fixed driving gears 31 and 33, movable driving gears 32 and 34, fixed eccentric weights 51 A and 52A, and movable eccentric weights 51B and 52B, and on the outer periphery of the phase adjustment shaft 23 which is arranged in parallel therewith, spiral grooves 61 and 62 are provided at two locations in the rotative directions opposite to each other and at the same time, on the inner periphery of a pair of phase adjustment gears 35 and 36, pins 63 and 64 are planted to be slidably fitted into the above-mentioned spiral grooves 61 and 62. Then, the phase adjustment shaft 23 is forcibly traveled by a cylinder 50 in the axial direction. The vibromotive force can be varied arbitrarily and infinitely even during the operation; yet the structure is simple and rational, and is fabricated with ease.