Using precise torque limitation, torque limiting clutches ensure that the loads on parts in machines and systems do not exceed the permitted values. Up to now, torque limiting clutches have required an external limit switch with a cable to transmit a signal to the control system on overload. The EAS®-Sensor developed by mayr® power transmission, a torque limiting clutch with an integrated signal transmitter, sends the overload signal via radio. This revolutionary and absolutely reliable overload recording system has substantial advantages in comparison to standard signal transmission devices.
On the new EAS®-Sensor, the limit switch is directly integrated into the clutch. It registers the clutch disengagement movement on overload and transmits a wireless signal via radio to a base station which is combined with the machine control system. The EAS®-Sensor is adjusted at the site of manufacture ready for operation. Assembly and adjustment work is no longer required. The overload recording is absolutely reliable. Vibrations and axial clutch misalignments – for example should the shaft heat up and expand – have no influence on functional safety.
The transmitter on the new system is completely located, including its power supply, in the torque adjusting nut on the tried and tested EAS®-Compact® torque limiting clutch. It reports to the base station in regular, brief intervals via a status telegramme the clutch operating condition and transfers information on the level of the supply voltage. A drop in voltage actuates a warning signal in good time, so that the transmitter battery can be replaced. For this, the clutch need not be deinstalled.
The development of the new EAS®-Sensor has made the signal transmission on mechanical torque limiting clutches far safer and has substantially simplified the installation of torque limiting overload protection systems. By integrating the transmitter into the tried and tested EAS®-Compact® clutch, the system has secure signal transmission as well as, of course, all the other quality features constituted in a modern, reliable torque limiting clutch. These include high torsional rigidity, backlash-free function, swift reductions in torque on reaching overload, high accuracy of the adjustable torque, long lifetimes and low lifecycle costs. Torque limiting clutches in the construction series EAS®-Compact® fulfil these criteria perfectly.