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1. WO1995008855 - PORTE-BALAI DYNAMOELECTRIQUE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A brush holder body for a dynamoelectric machine comprising:
a molded body;
integrated cantilever fingers molded into the body, the cantilever fingers extending rad: lly inward from distal portions of the body, the cantilever fingers having a normal position into which they are molded extending at an angle to a plane of a commutator clearance opening, the angle having a direction extending away from a motor armature position, wherein the cantilever finger is flexible and, upon receipt of a force, flexes in the direction of the armature; and
means for retaining the cantilever finger in a second position in which the cantilever finger prevents movement of a brush into the commutator clearance opening, wherein in the normal position, the cantilever finger allows movement of the brush into the commutator clearance opening.

2. A brush holder for a dynamoelectric machine comprising:
a single molded piece having at least two cantilever fingers extending radially inward from radially distal body portions, the single molded piece adapted to receive a shaft and commutator from a first side;
the cantilever fingers being molded at a first position wherein the cantilever fingers extend at a predetermined angle to a plane of a clearance opening for receiving the commutator, the angle in a direction away from the side of the brush holder adapted to receive the commutator and shaft; and means for releasably retaining each cantilever finger in a second position substantially co-planar with the space for receiving the commutator.

3. An apparatus comprising:
a motor commutator;
a brush holder having an integrally constructed cantilever finger having a first normal position at which first position the finger normally rests when forces are nrt applied to the finger and does not contact the motor commutator, wherein the finger is deflectable into a second position;
at least one brush mounted within the brush holder;
a spring biasing the brush towards the motor
commutator;
means for retaining the finger in the second position before the commutator is assembled to the brush holder, wherein the finger contacts an axially facing surface of the brush thereby retaining the brush in a retracted position so that the brush does not interfere with assembly of the commutator to the brush holder;
means for releasing the finger from the second position when the commutator is assembled to the brush holder, allowing the finger to move back to its normal first position and allowing the brush to extend and to contact the motor commutator, wherein, after assembly, the finger does not rub against the motor commutator.

4. A method of assembling a dynamoelectric machine comprising the steps of:
(a) fabricating a brush holder, having a body and at least one finger extending therefrom, wherein the finger has a normal position where it does not interfere with a commutator region of the motor;

(b) placing a brush in a brush holder;
(c) deflecting the finger from the normal position to a retained position where at least a portion of the finger interferes with a commutator region, in which position, the cantilever finger retains the brush in a retracted position out of interference with the
commutator region;
(d) assembling the commutator to the brush holder, wherein the commutator contacts the finger portion interfering with the commutator region, releasing the finger from the retailed position, wherein the finger snaps back to the normal position out of interference with the commutator, thereby preventing drag, noise and wear of the cantilever finger on the commutator.