A demolition robot (1) comprises a robot arm (2) and a saw tool (3) having an exchangeable saw blade (5), wherein the saw tool comprises a rotatable spindle (4) with an end portion (4.1) and a saw blade comprising a hub (6), and the saw blade hub is releasably arranged on the end portion (4.1) of the spindle with a torque-transmitting connection (7), and wherein a release mechanism (30) for automatic exchange of the saw blade (5) is arranged on the robot arm.

A tool interface for coupling a tool to a robot. The tool interface has an abutment face for abutting a corresponding abutment face of the tool, and a coupling device for mechanically coupling the tool to the tool interface. A discharge device is provided for producing a discharge air flow in the region of the abutment face. The discharge device has a plurality of nozzle openings for discharging the discharge air flow, and the nozzle openings are supplied with compressed air by a common compressed air connection of the tool interface.

A robotic tool changer system through magnetic coupling force and all-round mechanical locking includes a first coupling unit, a plurality of second coupling units, and a plurality of tool changer grippers. The first coupling unit is fixed to a robot arm. The first coupling unit includes a first locking unit and a first magnetic unit. Each second coupling unit is detachably connected to one of the tool changer grippers and includes a second locking unit and a second magnetic unit. When the first coupling unit is moved to approach one of the second coupling units at a predetermined distance, the first coupling unit and the second coupling unit are coupled to each other by a magnetic coupling force, then the first coupling unit and the second coupling unit are fixed to each other through all-round mechanical locking of the first locking unit and the second locking unit.