Electric motor a is connected by turning pair A to housing 2 of the rammer. Unbalanced masses m are mounted on the motor shaft. When shaft 1 of motor a rotates, the components of the unbalanced forces in the direction along axis x-x are transmitted by springs 3 to lever b which holds housing 2 against the material being rammed. The ramming action is due to the components of the unbalanced forces in the direction of axis y-y.
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