FIELD: mechanical engineering. SUBSTANCE: vibration exciter has body 1, two electric or hydraulic motors 2, unbalance shaft 3, four unbalances 4 freely fitted on this shaft, two rigidly fitted unbalances 5, freely fitted double-unbalance 6. The exciter also has bevel gears 7 fixed to all unbalances and intermediate gears 8, 9 and 12 engageable with them and mounted on axles 10 and 11. Axles 10 may be axially moved together with gears 8 and 12 disengaging them with gears 7. Axles 10 may be displaced by different devices, for example, hydraulic. EFFECT: improved structure. 5 dwg
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