Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1988-04-29
1990-01-23
Skudy, R.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 68R, 310 72, 310 91, H02K 1300
Patent
active
048960675
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention is directed to a brush mounting assembly for an electric motor.
It is known in the prior art to mount the brushes of an electric motor upon a plate or frame which is also employed to mount other electric components, such as the inductors, etc. of a noise suppression circuit and thermal switches for interrupting the motor circuit in the event of over heating. These mounting plates are customarily formed with a centrally located opening through which the motor armature projects, with the brush holders located at dynamically opposite sides of the central opening. Space is at a premium, and the locating and mounting of the brushes and associated circuit elements upon the relatively small mounting plate in a compact manner such that the individual elements may be easily assembled and accessibly presents problems which have not been fully solved in the prior art.
SUMMARY OF THE INVENTION
In accordance with the present invention, a disk-like brush mounting plate is formed of a suitable non-electrically conductive plastic material as an integral one-piece molded structure. The mounting plate is provided with openings through which tabs of metal brush holders may be projected and bent into place, and with recesses and projecting lugs associated with the various recesses arranged in a manner such that circuit components, such as inductors or thermal switches may readily be assembled on to the plate by a snap fit. The plate is so designed that certain components, when assembled to the structure, are located on one side of the disk like plate, while other components are located on the opposite side of the plate--i.e. the components are axially spaced from each other in relationship to the axis of the central armature receiving opening to achieve a very compact assembly.
Other objects and features of the invention will become apparent by reference to the following specification and to the drawings.
IN THE DRAWINGS
FIG. 1 is an end view of the rear face of a brush mounting structure embodying the present invention;
FIG. 2 is a cross-sectional view of the structure of FIG. 1 taken on the line II--II of FIG. 1;
FIG. 3 is an end view of the front face of the mounting structure of FIG. 1;
FIG. 4 is an rear view of the mounting structure of FIG. 1 showing various circuit components assembled to the mounting structure;
FIG. 5 is a cross-sectional view taken on the line V--V of FIG. 4;
FIG. 6 is a partial view of a housing cover employed with the mounting structure; and
FIG. 7 is a detailed cross-sectional view showing the manner in which a tubular rivet is mounted upon the mounting structure of the preceding figures.
A brush assembly embodying the present invention includes a one-piece mounting plate designated generally 10 of a suitable non conductive plastic material preferably formed by a molding operation. Mounting plate 10 includes a planar disk-like main portion 11 formed on its front 25 and rear 19 faces with various apertures and projecting lugs to be described below. In FIGS. 1-3, mounting plate 10 is shown alone, while in FIGS. 4 and 5, which correspond to FIGS. 1 and 2, mounting plate 10 is shown with various electrical and mechanical components assembled to it.
Mounting plate 10 is formed with a centrally located opening 9 through which, when the plate is assembled with an electric motor in a well-known manner, the motor armature will project. A pair of hollow, tubular brush holders 12 (FIGS. 4 and 5) which slidably receive motor brushes 13 may be mounted upon the rear side of the disk-like main portion 11 by means of mounting tabs 12a formed on brush holder 12 which project through slot-like openings 14 (FIGS. 1 and 3) through main portion 12 to be bent into engagement with the front face 25 to retain brush holder 12 in position. Preferably, the rear face 19 of main portion 11 is formed with projecting ribs 12b which extend along and engage opposed sides of the tubular brush holders 12 as best seen in FIGS. 4 and 5 to locate the elongate brush holders 12 in
REFERENCES:
patent: 4329605 (1982-05-01), Angi
patent: 4340831 (1982-07-01), Kuhlmann
patent: 4342934 (1982-08-01), Van Wijhe
patent: 4426770 (1984-01-01), Frank
patent: 4449090 (1984-05-01), Gotoh
patent: 4638204 (1987-01-01), Kirchner
patent: 4673837 (1987-06-01), Gingerich
Seitter Robert P.
Skudy R.
SWF Auto-Electric GmbH
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