Electric motor i.e. wiper motor, for driving e.g. vehicle, has pressure compensating device connecting inner chamber of sealed drive housing with pressure compensating volume, where hole formed in chamber is closed by hydrophobic membrane

摘要

The motor has a pressure compensating device (2) connecting an inner chamber of a sealed drive housing (1) with a pressure compensating volume (4). A hole (14) is formed in the inner chamber and closed by an air-permeable, hydrophobic membrane (5). The pressure compensating device is mounted in the hole in form-fit and/or force-fit manner. The compensating device includes a bearing bush (9), which includes a bearing hole (11) for placing an armature shaft (3). The bearing hole is connected with the volume via a pressure compensating channel (12).