328 Каталог GEDORE 2014 Профессиональный слесарный инструмент и оборудование Стр.326

Каталог GEDORE 2014 Слесарный инструмент Стр. 326 0328 ENG Lab2u

GEDORE Working principle Torque - velocity The chart representation elucidates the principle of torque multiplication. Let us assume a 60 N-m input torque and a 240 N-m output torque. At a 1:4 ratio 4 revolutions are needed at the input for 1 revolution with a 240 N-m torque to be obtained at the output. This is substantiated in terms of the physical formula Power torque x revolution With gear efficiency deducted the output power is to be considered as a constant equal to the input power. Thus multiplication of the torque can only be obtained from an increased number of revolutions at the input. INPUT Input torque with torque wrench 60 N-m Output torque 240 N-m Working principle Force and reaction When working with a torque multiplier torsion wind-up is built up in the gear when the screw is tightened. This stress must be reduced. A reaction absorbed by reaction arm and abutment is produced. ft L-form reaction arm with adjustable reaction square The reaction acts on the adjacent impact socket. L-form reaction arm without adjustable reaction square The reaction acts on the wall. Is possible but the tilting moment which arises causes the max. permitted torque to drop by 20 %. Reaction arm in Z-form The reaction acts on the adjacent screw connection N m N m i 326