Vibrating plate for compacting soil has one unbalanced mass not requiring phase adjusting device but all other unbalanced masses with such device

摘要

The vibrating plate has coupled upper and lower masses, a soil contact plate (4) and a vibration generator device (7). At least four unbalanced masses can rotate on their axes (17), at least two being at an angle to the others. One unbalanced mass does not require a phase adjusting device, but all the other unbalanced masses have such a device.