Features • Forces limited in both directions • High response accuracy • Automatic re-engagement • Maintenance-free • Robust construction • Uncomplex design • Easy to build on • For disengaging forces up to 140 000 N • Disengaging force finely adjustable Application Example Shown in figure 74-2 is the operation of the feeding equipment for workpieces on an interlinked installation. The feeding equipment is driven by a crankshaft pin on the output shaft via a connecting rod and a lever. The Force Limiter with non-contact proximity switch is built into the connecting rod as shown in figure 74-2. If the material jams the force in the connecting rod increases considerably, causing extensive damage in the machine if there is no safety installation available. The Force Limiter ensures that no excessive high forces reach the feed mechanism. If the force in the Force Limiter exceeds its preset limit it disengages and, through the non-contact proximity switch, a signal is given to switch off the drive. Why RINGSPANN Force Limiters? There are many ways of transmitting forces and torques in machines, installations and vehicles. The advances in constructional engineering are marked by components which run faster and are of a lighter construction. Therefore it has become necessary to provide for safety elements at the critical points. Until now these were usually in the shape of overload clutches on rotating shafts which, once the maximum torque was exceeded, would either slip, stop, or automatically cut out. However, many machines and installations have elements which transmit longitudinal forces. To prevent damage and breakdowns a solution for limiting the amount of these forces has to be found. RlNGSPANN has designed a series of Force Limiters, outstanding in that forces up to a certain size can be transmitted in both directions completely free of play and rigid. On exceeding the pre-set disengaging force FA the power of the force is interrupted and the output part is no longer driven. After the overload has been cleared the driving part and the driven part are aligned towards each other and the Force Limiter re-engages automatically. The Force Limiter can be fitted with non-contact proximity switch to give early warning of reaching a certain force, or di

RINGSPANN Force Limiter PAG as overload clutch in a filling plant

Assembly and Operation Assembly and operation of the RINGSPANN Force Limiter can be seen in illustrations 76-1 and 76-4. The sectional drawing in figure 76-1 shows the standard type of basic unit. The rod (1) is connected with the housing (3) via locking segments (2). The locking segments (2) are pressed into the groove (5) of the rod and against the conical surface (6) of the slide ring via the disc spring pack (4). If a force is effective between the rod and the housing, then, according to figure 76-4, up to force FB no movement takes place between the two parts. If the force is increased the...

Series PAG with mounted proximity switch K proximity switch in push direction disengaged in pull direction disengaged Series PA without proximity switch 77-1 Technical Data and Dimensions Type without with proximity proximity switch switch PA 12 PA 20 PA 30 PA 50 PA 75 Proximity switch • Proximity switch: signals excessive disengaging force for drive unit braking Operating voltage: Engagement travel Across flats Normal condition: Domestic electricity requirement: Protection class: Ambient temperature: Cable length: Please indicate the required disengaging force on your order. The Force Limiter...