Product-catalog_2012

Worm gear units GFC Product Catalog 2012 / 49 2 In attachable gearbox motors/gearboxes and torque supports, ex- terior forces are exerted on the work machine shaft. The force- exertion point and the direction of the action of the exterior force depend on the position of the torque support and on the direction of rotation. The torque support must be designated for attach- ment on the work-machine side of the gearbox motor/gearbox. This minimizes the bending wear on the work machine shaft due to exterior forces. The mounting bolt for the torque support must be positioned on both sides. Forces exerted: Fm = force from the mass Fs = force exerted on the torque-support mounting bolts Fr = exterior force exerted on the work machine shaft z = lever length for the torque support n2 = rotation speed of the hollow shaft T = output-drive torques TR = reaction torque on the gearbox housing The output-drive torque equals the reaction torque; however, in the opposite direction. The appropriate selection of the force-exer- tion point and the direction of the action of the exterior force can achieve (along with the force from the gearbox mass) a reduction in the exterior force exerted upon the work machine shaft. a Arrangement of torque converter bearing flexible bushing n2 z Fm Fr TR Fs 90 0 180 0 225 0 270 0 60 0 120 0 135 0 150 0 210 0 240 0 300 0 Fs Fs 2 Fs 2 0 0 45 0 30 0 315 0 330 0 Application guideline for the attachment of torque supports Size 0° 30° 45° 60° 90° 120° 135° 150° 180° 210° 225° 240° 270° 300° 315° 330° 40 r r r r r r 50 r r r r r 63 r r r r r r r r r 80 r r r r r r r r r 100.1 r r r r r r r r r 125.1 r r r r r r 160.1 r r r r r r Possible mounting positions for torque converter bearing Installation guidelines Size S 40.1 – 160.1 flexible bushing n2 z Fm Fr Fs 60° 90° 120 ° 135 ° 150 ° 180 ° 210 ° 225 ° 240° 270 ° 300° 315 ° 330 ° 0° 30° 45° T TR Fs Fs 2 Fs 2 Arrangement of torque converter bearing S 40.1 – 80.1 S 100.1 – 160.1