Adjustment mechanism of the pretensioning force in belt-pulley transmission system

摘要

Simple and compact mechanism which allows tightening belts which transmit power from a drive shaft (11) to a follow-up shaft (12). This mechanism provides means for varying and fixing the distance between the drive shaft (11) and the follow-up shaft (12) maintaining them substantially parallel. The use of the proposed mechanism does not have losses due to the contact with an additional tightening element and a similar traction torque is obtained in two rotation directions which make it possible to accurately graduate the tension.