Drum housing for a working drum of a construction machine or mining machine, construction machine or mining machine, as well as method for monitoring the condition of a working drum of a construction machine or mining machine

A method for monitoring the condition of a working drum of a construction machine or mining machine or of the tools thereof arranged on the circumference of the working drum by measuring the condition of the working drum or the tools thereof by means of a monitoring device through at least one inspection opening in a housing shell of a drum housing, said housing shell at least partially enclosing the circumference of the working drum, the method comprising:

• (a) closing the at least one inspection opening during the working operation of the working drum and opening the inspection opening for the duration of the condition measurement, with an interruption of the working operation in which the working drum is not engaged with a surface to be worked, wherein the at least one inspection opening, in closed condition, is closed with at least one insert element complementary to the corresponding inspection opening, said insert element being locked in the closed position in a positive-fitting fashion;
• (b) opening the at least one inspection opening;
• and
• (c) inspecting the condition of the working drum or the tools thereof through the at least one inspection opening with the monitoring device located outside of the at least one inspection opening.

A construction machine apparatus, comprising:

• a working drum including working tools, the drum having a circumference and being rotatable about a drum axis;
• a drum housing including a housing shell at least partially enclosing the circumference of the working drum, the housing shell including a first inspection opening therein;
• a monitor arranged outside of the inspection opening to inspect the working tools through the inspection opening;
• a closure;
• and
• a powered actuator arranged to move the closure between a closed position wherein the closure closes the inspection opening, and an open position wherein the inspection opening is open.