ELECTROMOTOR DRIVE, IN PARTICULAR DRIVING SERVO FOR A VEHICLE

摘要

In order, e.g. for the purpose of protection against becoming sandwiched in the case of a motor vehicle window lifter drive, to be able to detect the particular rotational speed and/or direction of rotation of the drive commutator motor in a simple fashion, it is proposed according to the invention to provide on the brush holder (3) of the commutator motor at least one Hall sensor (5 or 6) that can be connected to a rotational speed evaluation circuit, and on the rotor shaft (21) a magnetic rotor (4) assigned to the Hall sensor (5 or 6); it is expedient in the case of a driving servo having a stator housing (11) of the commutator motor that seals tightly on the commutator side with an open end face against a gearbox (7) for the magnetic rotor (4) to be arranged outside in front of the end face of the commutator (3) on the gearbox side.