Electric motor, especially for a windshield wiping system of a motor vehicle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 31, 1995
Grant Date -
N/A
app pub date -
Mar 18, 1993
filing date -
Jul 18, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In order to be able to completely eliminate the axial play of an armature spindle of an electric motor, especially for a windshield wiping system of a motor vehicle, even though conditions change over time, a prestressing member acted upon by a spring leg continuously presses against the end of the armature spindle. The prestressing member does not necessarily have to abut directly on the end of the armature spindle, but rather a cap is inserted onto the end of the armature spindle and non-rotatably fixed to the motor housing or a gear housing. An eccentric formed as the housing of the prestressing member abuts on the outside of the bottom of the cap. In an alternative embodiment, a mushroom shaped prestressing member having a mushroom head presses against the end of the armature spindle. The axial feed movement results from a rotational movement caused by the spring in connection with at least one helical surface on the prestressing member which cooperates with a helical counter surface of the housing with each stroke in the turning direction.
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