US 7,518,281 B2
	Electric motor with a housing for at least two carbon brushes
Winfried Habel, Leinfelden-Echterdingen (Germany); Otto Baumann, Leinfelden-Echterdingen (Germany); Siegfried Fehrle, Leinfelden-Echterdingen (Germany); Andre Ullrich, Filderstadt-Bernhausen (Germany); Michael Weiss, Stuttgart (Germany); and Hardy Schmid, Stuttgart (Germany)
Assigned to Robert Bosch GmbH, Stuttgart (Germany)
Appl. No. 10/511,286 PCT Filed May 30, 2003, PCT No. PCT/DE03/01761 § 371(c)(1), (2), (4) Date Dec. 05, 2005, PCT Pub. No. WO2004/004094, PCT Pub. Date Jan. 08, 2004.
Claims priority of application No. 102 28 493 (DE), filed on Jun. 26, 2002.
Prior Publication US 2006/0087196 A1, Apr. 27, 2006
Int. Cl. H02K 5/14 (2006.01)

U.S. Cl. 310—239  [29/596; 29/732]

5 Claims

1. An electric motor comprising a holder (6) for at least two carbon brushes (5), which by means of a spring force (7) are pressed in a radial direction against a jacket face of a cylindrical collector (4) fixed to an armature shaft (2) of the motor, and a pivot bearing (3) that holds the armature shaft (2), characterized in that the holder (6) can be pulled off together with the carbon brushes (5) from the collector (4) in the axial direction of the armature shaft (2); and that covering means (11, 12) for covering the pivot bearing (3) to protect it against entry of dirt are disposed on a side of the covering means (11, 12) facing the holder (6) for the carbon brushes (5), provided with one or more chamfers (14, 15) in such a way that the carbon brushes (5) slide over the covering means (11, 12) as the holder (6) is being pulled off and that the carbon brushes (5) thereby are thrust radially outward counter to the spring force (7).