Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
1999-06-01
2001-02-20
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06800R, C310S089000, C310S239000
Reexamination Certificate
active
06191514
ABSTRACT:
The present invention relates to an actuating motor, of a functional unit of a motor vehicle for example.
Such motors find many applications particularly in motor vehicles, in order to provide actuation for functional units, such as seats, windows, sun roofs, etc, of these vehicles.
In general, such motors include a stator in which a rotor is arranged, the stator including, at each of it ends, a flange for guiding the corresponding end of a shaft linked to the rotor, and each guide flange includes a guide bearing configured to accommodate a corresponding end portion of the shaft when this flange is assembled onto the stator.
Moreover, the motors of this type also include means for supporting a brush-holder plate, arranged in the stator close to one of its ends, these support means being held in assembled position in the stator by elastic means interposed between the corresponding flange and these means.
Finally, some motors are also equipped with means for detecting the rotation of the shaft comprising a first portion carried by this shaft and a second portion carried by a corresponding flange.
The object of the invention is to propose various improvements to the motors of this type, with a view to simplifying the structure and assembly, and to reduce their manufacturing cost.
To that end, the subject of the invention is an actuating motor, for example of a functional unit of a motor vehicle, of the type including a stator in which a rotor is arranged, the stator including, at each of its ends, a flange for guiding the corresponding end of a shaft linked to the rotor, each guide flange including a guide bearing configured to accommodate a corresponding end portion of the shaft when this flange is assembled onto the stator, and means for detecting the rotation of the shaft comprising a first portion carried by this shaft and a second portion carried by a corresponding flange, characterized in that the second portion of these detection means which is carried by the corresponding flange is arranged on a printed circuit board configured so as to be engaged in a corresponding recessed housing of the flange, and in that the flange and the plate include means for complementary locking in assembled position by elastic clipping.
This makes it possible to simplify the structure of this motor, to the extent that, in the state of the art, the second portion of the detection means is bonded or welded to the corresponding flange.
Moreover, each flange includes axial abutment means configured to interact with the corresponding end of the shaft so as to hold the rotor in axial position in the stator.
This makes it possible to simplify the structure of such a motor, to the extent that, in the state of the art, the rotor is held in axial position in the stator by elements in the form of washers force-fitted over each end of the shaft of the motor, these washers being configured to come to bear against the guide bearings of the flanges.
Advantageously, this motor also includes means for supporting a brush-holder plate, which are arranged in the stator close to one of its ends, these support means being held in assembled position in the stator by elastic means interposed between the corresponding flange and these means, and in the motor according to the invention the elastic means comprise at least one elastic tab made of the same material as the rest of the flange, this tab being configured to press the means for supporting the brush-holder plate elastically into assembled position in the stator and to make it possible to take up the clearances in assembling the means in the stator.
This also makes it possible to simplify the structure of this motor, to the extent that, in the state of the art, an elastic ring is arranged between the flange and the means for supporting the brush-holder plate in order to hold the means in assembled position.
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Carlson, Caskey & Olds
Dinh Le Dang
Meritor Light Vehicle Systems (France)
Ramirez Nestor
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