| 摘要 |
<p>Breaker (1) for excavator comprising a body (10) inside which a hydraulic circuit is formed which can be supplied from the outside with liquid under pressure, said hydraulic circuit comprising: an inlet (13) for the liquid under pressure; an outlet (18) for the return of the liquid under pressure to the supplying circuit; an active thrust chamber (ll)with a first diameter and a passive thrust chamber (20); ducts (12, 21) to connect said active thrust chamber (11) and said passive thrust chamber (20) to said inlet (13); a piston (15) configured so that it can slide in areciprocating motion inside said breaker under the thrust of said liquid under pressure wherein said piston (15) is provided, at the active thrust chamber (11), with a projection with a second diameter (C) smaller than the first diameter of the active thrust chamber (11), said projection being wholly contained inside the active thrust chamber (11).</p> |
