Actuating drive comprising two friction partners

An actuating drive for lifting a window in a motor vehicle comprising:

• a worm shaft;
• a worm wheel driven by said worm shaft, said worm wheel having a cup-shaped rim part with worm gearing on a radially outer surface of said cup-shaped rim part, said worm gearing cooperating with said worm shaft;
• a slave disc, a radially inner surface of said cup-shaped rim cooperating with a radially outer surface of said slave disc, said slave disc being mounted concentrically with said worm wheel;
• and
• an elastic damping liner, said elastic damping liner being disposed axially between said worm wheel and said slave disc, said liner damping tangential movement between the worm wheel and the slave disc;
• the radially outer surface of said slave disc being toothed over its periphery with undulating radial elevations, said elevations cooperating with the radially inner surface of said worm wheel, wherein depressions are formed between the elevations.

An actuating drive for lifting a window in a motor vehicle comprising:

• a worm shaft;
• a worm wheel driven by said worm shaft, said worm wheel having a cup-shaped rim part with worm gearing on its radially outer surface, said worm gearing cooperating with said worm shaft;
• a slave disc, a radially inner surface of said cup-shaped rim part cooperating with a radially outer surface of said slave disc, said slave disc being mounted concentrically with said worm wheel;
• and
• an elastic damping liner, said elastic damping liner being disposed axially between said worm wheel and said slave disc, said liner damping tangential movement between the worm wheel and the slave disc;
• a radially inner surface of said cup-shaped rim part is toothed over its periphery with undulating radial elevations, said elevations cooperating with the radially outer surface of said slave disc, wherein depressions are formed between the elevations.