Belt tensionser coupling with a rotary drive unit

摘要

A coupling between the rotor (16) of a belt tensioner rotary drive and a drive shaft (22) comprises an externally toothed coupling wheel (24) connected to the drive shaft (22) and at least one coupling pawl (32) arranged on the rotor (16). The coupling pawl (32) is movable between a resting position in which it is spaced away from the periphery of the coupling wheel and an engaging position in which it engages the coupling wheel. The coupling pawl (32) is toggle-mounted on a knife-edge bearing on the rotor (16).