| 摘要 |
<p>The device (11) has an outer housing (12) in which a motor (16), drive (17), hammer mechanism (18) and control electronic system (19) are provided. A closed cycle cooling system (21) is provided for a coolant e.g. water, for cooling the motor, drive, hammer mechanism and control electronic system. A heat exchanger (26) is provided in the closed cycle cooling system for cooling the coolant, and is firmly connected with the device, where the heat exchanger is arranged at the outer housing. A pressure generating pump (31) is provided downstream to the closed cycle cooling system for the coolant.</p> |
