Patent ID: 7401862

Claim:
A construction machine for working pieces of ground, having a milling roller ( 10 ) with a surface with a plurality of arranged chisel holders ( 23 ), wherein a chisel ( 30 ), including a round shaft chisel, is exchangeably received in a chisel receiver ( 24 ) of the chisel holder ( 23 ), the construction machine comprising: a tool changing device in combination with the milling roller ( 10 ), wherein the tool changing device at least one of removes the chisel ( 30 ) from the chisel holder ( 23 ) and installs the chisel ( 30 ) in the chisel holder ( 23 ), and a displacement device positioning one of the milling roller ( 10 ) and the chisel ( 30 ) relative to at least one tool changer ( 40 ), and an actuating unit positioning the at least one tool changer ( 40 ) relative to the chisel ( 30 ) along a center longitudinal axis of the milling roller ( 10 ).