Crank 1 rotates about fixed axis A. Connecting rod 5 is connected by turning pairs B and C to crank 1 and to frame 6 which slides along fixed guides a-a. Frame 6 has rods b. Movable frame 7 slides along fixed guides a-a and rods b. Spring 4 of frame 7 is connected to frame 6, and springs 3 spring-load frame 7 as it slides along rods b. Rigidly attached to frame 7 is rammer 2 which vibrates along axis y-y due to the action of springs 3 and 4 when crank 1 rotates.
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