DRIVE DEVICE FOR A WINDSCREEN WIPER SYSTEM

摘要

The invention concerns a drive device (1) for the windscreen wiper system of a motor vehicle, the drive device (1) comprising: an electric motor (2) with a mounted armature shaft (7) and an associated worm for driving gear elements; a gear housing (3); and an axial-force-generating arrangement for the armature shaft (7). According to the invention, disposed on each side of the worm (15) is one roller bearing (17, 18) which is located in a bearing seat (19, 20) in the gear housing. The axial-force-generating arrangement (21) is associated with at least one roller bearing (17, 18) and acts upon an inner ring (18') with specific force. Owing to the permanent pre-tension, the armature shaft (7) is mounted in axially play-free manner such that impact noises when the load changes at the change-over points of the windscreen wiper arm are prevented.