Construction machine
AssigneeLiebherr-Werk Ehingen GmbH
InventorsThomas Lerner, Roland Bohnacker
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a construction machine having an undercarriage; a superstructure rotatably supported relative to the undercarriage by a revolving roller connection; and a control system, wherein measuring devices are arranged in the revolving roller connection for the force measurement in the directions of pulling and compression, and the control system determines the force in the axis direction of the axis of rotation as well as the torque which is caused by the eccentricity of the force with respect to the axis of rotation from the detected measured values of the measuring devices. From this, improved monitoring of the operational safety and stability of such a construction machine is achieved.
Claims17
A construction machine comprising:
- an undercarriage;
- a superstructure rotatably supported relative to the undercarriage about a vertical axis by a revolving roller connection;
- one or more force measuring devices arranged in a region of the revolving roller connection;
- and
- a control system receiving information from the one or more measuring devices including a ring-shaped measuring element coupled to the revolving roller connection and determining one or more resulting forces in an axial direction and perpendicular to the axis of rotation based on the information, the control system further determining an equivalent torque caused by eccentricity of the one or more resulting forces relative to the vertical axis.
A method of monitoring the operational safety and stability of a construction machine having an undercarriage;
- a superstructure rotatably supported relative to the undercarriage by a revolving roller connection about an axis of rotation;
- and a control system, comprising:
- determining, in the control system, a force in an axial direction of the axis of rotation of the revolving roller connection, calculating a force in a horizontal direction on the basis of a thrust force measured at the revolving roller connection, determining a torque which is caused by eccentricity of the forces with respect to the axis of rotation on the basis of measured pulling forces and compression forces at the revolving roller connection between the superstructure and the undercarriage;
- and monitoring the construction machine based on the force and the torque.
A method of monitoring the operational safety and stability of a construction machine having an undercarriage;
- a superstructure rotatably supported relative to the undercarriage by a revolving roller connection about an axis of rotation;
- and a control system, comprising:
- determining, in the control system, a force in an axial direction of the axis of rotation of the revolving roller connection, determining a torque which is caused by eccentricity of the force with respect to the axis of rotation on the basis of measured pulling forces and compression forces at the revolving roller connection between the superstructure and the undercarriage;
- and monitoring the construction machine based on the force and the torque, including determining stability of a crawler-mounted crane or of a mobile crane based on a determined ground pressure or applied axial and tire load.
Dependencies are inferred from the claim text.