Antriebsvorrichtung für Scheibenwischer von Kraftfahrzeugen

摘要

The driving mechanism for a wiper of a motor vehicle includes a reversible drive shaft, a two part crank whose one part is secured to the drive shaft and whose other part is linked to the wiper to oscillate the same when the drive shaft rotates in one direction. To displace the wiper into rest position outside its wiping field when the wiping operation is switched off, there is provided a control plate rotatable about the drive shaft and supporting a swing lever provided with a lock pawl. The drive shaft passes through a cylindrical support fixed to the frame of the motor vehicle and being provided on its jacket with an indentation for receiving the lock pawl. The control plate and the first crank part are provided respectively with guiding cams cooperating with cam followers provided on the swing lever and on the second crank part to bring the lock pawl into engagement with the indentation when the drive shaft reverses its direction and to displace a crank pin formed on the second crank part radially outwardly with respect to its orbiting circular path when the drive shaft rotates in the one direction for normal wiping operation.