Electro-pneumatic hammer drill / chisel hammer with modifiable impact energy

摘要

The hammer has a sensor device (10, 11) which captures a parameter correlated to the individual impact energy transferred to the substrate being broken down. A regulator (9) compares this parameter with an ideal value and generates a setting value. An actuator (7) impinged by the setting value tracks the individual impact energy to the ideal value. The sensor device can detect the momentary position and/or speed of the piston (4) in the forward direction to the impact tool and in the reverse direction whereby the kinetic energy difference is determined in a micro controller from the differential speed as a measure for the individual impact energy.