Drive device for moving a sliding sunroof of a vehicle

Details Drive device for moving a sliding sunroof of a vehicle Drive device for moving a sliding sunroof of a vehicle

1999-12-14

2001-03-13

Ramirez, Nestor (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S06700R, C310S071000, C310S239000

Reexamination Certificate

active

06201326

ABSTRACT:

PRIOR ART
The invention is based on a drive device, in particular for moving a sliding sunroof of a vehicle. A drive device has already been disclosed (European Patent Document 0 474 904), which is used to drive a window lifter. The drive device has a base housing, which is injection molded in one piece and is comprised of a transmission housing and an electronics housing. An electric motor which has an armature is affixed to the housing. The armature is accommodated in a cup-shaped pole housing, whose open end face is screw connected to the base housing. The armature also has a commutator which is disposed outside the pole housing in the base housing. An end region of the armature, which region adjoins the commutator, is thereby embodied in the form of a transmission drive shaft for a transmission and in this connection, has the form of a worm shaft, for example. In addition, a printed circuit board is accommodated in the base housing, which has a narrow strut that protrudes laterally from the printed circuit board. A brush holder that supports a brush is affixed to the strut.
Furthermore, the printed circuit board has a connecting piece that is embodied as a plug receptacle. The assembly of the drive device takes place in such a way that first, the printed circuit board is introduced into the transmission housing or base housing and is fastened there. Then, the assembly of the armature that is accommodated in the pole housing takes place, for which it is necessary to thread the armature with its commutator into the brush holder between the brushes. A final fixing of the position of the brush holder takes place after the fastening of the pole housing and only after a precise adjustment of the brush holder, to which end the brush holder is secured tightly to the printed circuit board by means of screws. An exact positioning of the brush holder or of the brushes resting against the commutator is necessary since otherwise, a faultless operation of the drive device cannot be assured. The assembly method described not only requires some skill, but it also hinders a machine assembly of the drive device. Moreover, since the brush holder is affixed only to a narrow strut of the printed circuit board, the result is a low mechanical stability and a complex and therefore expensive manufacturing process of the printed circuit board.
ADVANTAGES OF THE INVENTION
The drive device according to the invention has the advantage over the prior art of a simplified assembly as well as a particularly space-optimized embodiment and disposition of the printed circuit board in the drive device. It is particularly advantageous that an adjustment of the brush holder can be eliminated in the process. Furthermore, a simple disassembly of the brush holder with the brushes is also possible.
Advantageous improvements and updates of the drive device are possible by means of the measures taken hereinafter.
It is also advantageous that the brush holder and a plug receptacle that is provided can be embodied in one piece as a joint component, but can also be embodied as two separate pieces in order to thus be able to flexibly fulfill a wide variety of requirements in regard to the position and embodiment of the plug receptacle in a mass production process. Another advantage is a simplified assembly which is produced by virtue of the fact that during the final assembly of the armature, the brushes remain in a rear position in order to deliberately disengage only after the final assembly, for example of a transmission cover. It is also particularly advantageous that so-called Hall sensors, which in connection with a magnet ring disposed on the armature can detect the speed of the drive device, can be placed on the printed circuit board in a particularly advantageous manner. It is also advantageous that required interference suppression elements can be integrated directly into the brush holder, which increases the efficiency of the interference suppression measures as a result of the spatial proximity to the brushes. It is particularly advantageous that interference suppression coils that are integrated into the brush holder can simultaneously produce an electrical contact of the brushes with the electrical components provided on the printed circuit board. It is also advantageous that due to the rectangular shape of the printed circuit board, a necessary amount of waste in the production of the printed circuit boards can be reduced, by means of which the manufacturing costs of the printed circuit board can be reduced.


REFERENCES:
patent: 5528093 (1996-06-01), Adam et al.
patent: 5872411 (1999-02-01), Nakata
patent: 5942819 (1999-08-01), Burgess et al.

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