KBK Antriebstechnik has developed and it used a carbon material for a customer a novel spacer coupling for synchronizing axes and overcome long wheelbases. not an easy task even for experienced professionals in clutch - Thanks to this choice of material to overcome a distance of 6 m was no problem.
Precision aluminum tubes are considered an outstanding solution in the lightweight construction of backlash-free distance couplings. For the customer order, however, this material also reached its technical limits. "We had to come up with something completely new," explains Sven Karpstein, Sales Manager at KBK. Made of aluminum, the distance clutch would have reached a weight of approx. 18 kg. Apart from the impractical handling during assembly, the high weight would have led to slight sagging of the clutch, so that it would have come to swing at faster rotation of the system.
The engineers contacted a manufacturer of carbon fiber reinforced plastic (CFRP) and with their support based on frame size 28 of the DRE distance clutch designed a distance coupling that weighs only about 3 kg and does not sag, resulting in a relatively high number of revolutions of 6 even with 100 m length min-1 reached at a transmittable nominal torque of 160 Nm. In addition, this solution offers a high torsional rigidity. The DRE is easy to mount radially and has a vibration-damping effect thanks to double-sided elastomer toothed rings.
The prototype convinced the customer who needed the distance coupling for an automobile production line. The hubs were glued to the pipe as well as the aluminum variants. For this purpose, the bonding process for the new material was modified. However, Sven Karpstein does not see the development with the successful prototype at the end: "With the experience from this development, we will of course construct further sizes of the carbon spacer coupling according to customer requirements."