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Actuating drive with an electric motor and control electronics
| Details |
Inventors: Moskob, Frank;
Assignee: Robert Bosch GmbH (Stuttgart, DE)
Primary Examiner: Le; Dang Dinh
Assistant Examiner:
Attorney, Agent or Firm: Greigg; Ronald E.
An actuating drive with an electric motor that has a metallic electric motor housing, a shaft, an armature, collector, brushes, and a brush holder plate, and control electronics. Electronic and electric components are connected to a printed circuit board and the printed circuit board protrudes at right angles to the shaft and into a cross section of the electric motor housing. Outside the electric motor housing, the electronic and electric components are protected by a control electronics housing. Radio interference suppression means, for example, can be disposed inside the actuating drive. The system includes a printed circuit board with a strip conductor and a contact spring that leads from the strip conductor and this contact spring protrudes into the electric motor housing, wherein a resilient free end of the spring rests against the electric motor housing producing an electrical contact. |
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DETAILED DESCRIPTION I claim: 1.
An actuating drive with an electric motor, comprising a metallic electric motor housing, a shaft with an armature and collector, brushes, and a brush carrying plate, and control electronics for the electric motor, a printed circuit board, electronic and electric components are connected to the printed circuit board and the printed circuit board protrudes at right angles to the shaft and, adjacent to the brush carrier plate the printed circuit board protrudes radially into a cross section of the electric motor housing, and outside the electric motor housing, in a radial direction, the printed circuit board has a portion which is protected by a control electronics housing, a strip conductor (41), which is contacted by a radio interference suppression means (55) and extends radially into the cross section of the electric motor housing, is contacted by a contact spring (37, 37a, 37b), wherein the contact spring (37, 37a, 37b) protrudes from the printed circuit board (33, 33b) toward the electric motor housing (10) and has a resilient end (43) that rests against the electric motor housing (10) in a resilient fashion.
2.
The actuating drive according to claim 1, in which the brush carrying plate (17, 17a, 17b) is disposed axially between the printed circuit board (33, 33b) and the armature (13) and the contact spring (37, 37a, 37b) is inserted through the brush carrying plate (17, 17a, 17b).
3.
The actuating drive according to claim 2, in which the brush carrying plate (17) is an injection-molded piece made of insulating material and that the contact spring (37) is embodied in a form of a leaf spring and is encompassed by the insulating material in a materially adhesive fashion.
4.
The actuating drive according to claim 2, in which the brush carrying plate (17a) is made of an insulating material and has a conduit (45) through which the contact spring (37a) is slid.
5.
The actuating drive according to claim 4, in which the contact spring (37a) has at least one securing tab (46, 47) directed against the brush carrying plate (17a)
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