Geared motor unit for driving vehicle equipment, eliminating any axial play in its driveline
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 18, 2005
Grant Date -
Sep 18, 2003
app pub date -
Apr 11, 2003
filing date -
Nov 27, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention concerns a gear motor (1), in particular for driving vehicle equipment, comprising a rotor provided with a rotor shaft (6), a reduction gearbox housing (14) containing a cog wheel engaged in an endless screw of the shaft and capable of driving an output member (12). The invention is characterised in that it comprises means (12) for eliminating, under predetermined axial compression (F), all axial play between one end (6a) of the rotor shaft and the housing wall (13). Said means can comprise a plug (15) housed in the housing (14) end (13) and a piston (18), inserted between the plug (15) and the shaft (6) end (6a); the plug (15) exerts on the piston (18) and the shaft (6) the axial thrust (7) which is adjusted when being mounted, and is axially locked in the corresponding position by melting the housing (14) plastic material in the grooves or recesses (19) of the piston (18) surface, then in solidifying said plastic material. The suppression of axial play in the rotor shaft (6) eliminates all the disturbing noises caused by changes in rotational direction.
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Cited Art Landscape
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