| 摘要 |
mining, construction, and press-forging industries; applicable in hydraulically operated machines as devices for making of strong rocks and working of various materials. SUBSTANCE: percussive-action motor has a striker, resetting and drain chambers and accumulator filled with compressed gas, control unit accommodating differential control valve and additional control valve, channel communicating alternately control chamber with resetting and drain chambers. Depending on rock strength, control chamber is automatically connected with a channel of full run, or channel of multiple variation of the striker run. EFFECT: reduced energy of strike in reduction of strength of worked medium and increase of strike energy in increase of medium strength. 1 dwg
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