Drehmomentbegrenztes Kupplungselement sowie Verfahren zum drehmomentbegrenzten Kuppeln

DE 102009034055 A1 UPAB: 20110214 NOVELTY - The element has a drive part (1) and an output part (2) that are rotatably mounted around a common rotational axis (D). A connecting unit (V) is non-positively connected to a displacement body (4) that is movably arranged inside a chamber (3) filled with magnetorheological fluid (MRF). An electromagnet arrangement (5) is provided on or in a region of the chamber for generating a magnetic field and influencing displacement force of the fluid. The displacement body is deflected inside the chamber against the displacement force caused by the fluid when limit torque is exceeded. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for torque-limited coupling between a drive part and an output part. USE - Torque-limited coupling element for use in a torque spanner and a safety clutch of a machine tool (all claimed). Can also be used for portable tool such as drilling equipment, drive train clutch of a vehicle, agricultural equipment and construction machine. ADVANTAGE - The electromagnet arrangement is provided on or in the region of the chamber for generating the magnetic field and influencing the displacement force of the magnetorheological fluid, where the displacement body is deflected inside the chamber against the displacement force caused by the fluid when the limit torque is exceeded such that torque transmission between the drive and output parts can be adjusted in an accurate and quantitative manner, and degradation features in the magnetorheological fluids can be avoided