FIELD: ground compaction. SUBSTANCE: working member for ground compaction device has body, striker, anvil, drive shaft, working compacting member, drive, mechanism raising the striker in form of bushing, spring, two threaded cam half-couplings whose cams are accommodated in tight chamber filled with lubricant. Striker and upper half-coupling are made, respectively, with cone hole and projection. Upper half-coupling and bushing are furnished with additional threaded cams. EFFECT: higher efficiency. 4 cl, 7 dwg
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