Device and method for generating percussive pulses or vibrations for a construction machine

A device for generating percussive pulses or vibrations for a construction machine, the device comprising:

• a housing,
• a piston which is reversibly reciprocated in a working space in the housing between a first reversal point and a second reversal point, and
• a pressure fluid supply, through which pressure fluid is able to be led into and out of the working space in a region of the working space on a side of the first reversal point and in a region of the working space on a side of the second reversal point, wherein the piston is able to be set into the reversible movement in order to generate the percussive pulses or vibrations,
• wherein
• a sensor having a bar-shaped first measuring component and a ring-shaped magnet as a second measuring component, and configured to determine a position of the piston in the working space is provided,
• at least one controllable valve is arranged, through which the pressure fluid is able to be led into and/or out of the working space,
• a control unit is provided which is connected to the sensor and the at least one controllable valve, wherein the control unit is configured to control and change the movement of the piston in the working space,
• the ring-shaped magnet is fixed at the piston and is arranged in a free space within the piston,
• at the housing the bar-shaped first measuring component of the sensor is firmly arranged, the first measuring component extending into the working space and into the free space in the piston, and
• the piston with the ring-shaped magnet slides contact-free along the bar-shaped first measuring component.