DE1763512A1 - Brush support for electrodynamic machine - Google Patents

Description

The invention relates to a brush holder for electrodynamic Machines, including the collector of the machine non-gripping carrier plate with a central recess for the passage of the collector and from this central recess radially outwardly extending slots for guiding on the! Collector abrasive brushes.

Smaller electrical machines, especially nit machines lower lei π do ;;, the essential elements make up more numerous GerLItο and facilities.

So your Goijtehungsu oiites are becoming a very important one Factor. These x.orjten Iu Ing s essentially depend on the number the necessary components for an eimvandireie work v / eioe and of the ifauiii occupied by serving elements, and thus from the machine, for a given performance.

109834/0503

BAD ORIGfNAL

When looking for a solution for the construction of such machines, operational safety and ijeiatun _L ; not be affected. Up to now, the contact mechanisms for taking off the current in electrodynamic devices, v / ie for the office sound carriers for machines with one collector, had a large number of components.

At least two brushes are required for the "known designs as well as brackets for guiding and storing the brushes and fastenings for the brackets on one of the surfaces of the machine, whereby these fastenings often consist of a Multiple parts are assembled. So yes It is desirable to increase the number of components required for such mechanisms to draw power for optimal operation lower it to a minimum.

There are already known brush holders of the type mentioned at the beginning, which are simply designed and made of a plastic material are formed in which the necessary openings are cut out. These carrier plates are attached to the face flange attached to the line. The brushes are in the radial slots guided and biased towards the collector by springs. The brushes are guided in their movement by the edges of the radial slots formed in corresponding ones in opposite side surfaces of the brushes Grooves penetrate.

M S «3-4 · / Ό 5 .Q 3 BAD ORIGINAL

When cutting or punching the radial slots in the However, the carrier plate creates burrs which, in connection, rait the hygrometric influences and the ambient temperature of the Machine change the guide surfaces of the brushes so that jam or tilt them in the radial slots and the machine fails.

The object of the present invention is to eliminate the disadvantages indicated and to add to the structural engineering problems to solve. For this purpose, she proposes a brush holder of the type mentioned at the beginning, which is particularly characterized in that the brushes are longitudinally displaceable in fits are arranged, which are elastically latched in the radial slots of the support plate.

In Y / pus formation of the invention it is provided that the fits are molded from a plastic material and have a central elongated recess for guiding the brushes.

According to an advantageous embodiment of the invention is provided that hats extending in the longitudinal direction of the fits are formed on two opposite sides of the fits are which edges of the radial slots engage and thus hold the fits in these slots.

According to the invention, it is also advantageous if in the Extension of the grooves pointing towards the circumference of the carrier plate

1098 3 4/0 5-0-3

BATH ORIGINAL

elastic tongues are provided, each with a gradation in itself from the radial slots in the vicinity of the Extending the circumference of the carrier plate in the circumferential direction Bulges can be locked.

The training according to the invention results in a structurally simple but reliable latching of the brush holders in the carrier plate.

Further details and advantages of the invention result from the following description in conjunction with the accompanying drawings. The drawings show:

Fig. 1 shows a three-dimensional brush holder according to the invention,

Fig. 2 shows a three-dimensional view of a carrier plate of the brush holder according to the invention,

Fig. 3 shows a three-dimensional fit for guiding the "contact brushes of a brush holder according to the Er

finding.

The illustrated in Fig. 1 in its entirety brush holder according to the invention comprises a carrier plate 1 with one of the central opening penetrated by the collector of the machine 2. At the point where the two brushes 3, with the collector in contact ^ WiIl, are in the Carrier plate 1 starting from the central opening 2

1 0 9834 / Ü5ü3 BAD original

radial slots 5, 6 cut out. The carrier plate 1 is preferably formed from a suitable plastic material. At the circumferential end, the radial slots 5 '.6 are widened by lateral bulges ' I ₁ Q , which are also cut out of the carrier plate 1' and form a nose-like projection 9 between them.

Sockets 10 preferably manufactured by injection molding, 11 for guiding the brushes 3, 4 · are shaped so that they are in the carrier plate 1 can be inserted and locked there, specifically in the radial slots 5 »6.

For this purpose, the sockets 10, 11 (FIG. 5), in the interior 12 of which the brushes. 3 »4 are mounted longitudinally displaceably on zv / ei opposite side walls a groove 13 which can be latched to the edge 14 of the radial slots 5, 6 of the support plate 1, -

The edges 14 of the radial slots 5, 6 hold the sockets 10, 11 in the transverse direction by penetrating into the hats of the sockets.

Two elastic tongues 15, 16 are symmetrical about the axis of the Sockets 10, 11 formed in the extension of the hats 13. At their free end 17, these tongues are made wider and thus form gradations 18, which are each at the edges 7a and 8a of the bulges 7 and 8 can be locked. Through this

1098J4 / ÜSU3 BADORlGtNAL

■ - 6 -

the sockets 10, 11 in the radial slots 5, 6 the carrier plate 1 locked »

3 pressure of the brushes;, 4 on the collector is ensured by springs 19, which are centered on the one hand in the interior 12 of the sockets 10, 11 and on the other hand on the rabbits 9 at the lower end of the radial slots 5> 6.

An elongated hole 20 open on one side is in one, / and the Sockets 10, 11 formed and allows the movement of the connections 21 and 22 of the brushes 3, 4 when they are in the Move frames.

When assembling the brush holder according to the invention shown in FIG. 1, the brushes 3> are first grounded 4 inserted into the sockets 10, 11 in such a way that their connections 21, 22 protrude from the elongated holes 20.

Then the sockets 10, 11 are in the radial slots 6, of the carrier plate 1, being centered by the edges 14 engaging in the grooves 13, until after Attachment of the springs 19 steps 18 to the edges 7a, 8a of the bulges 7 »8 of the carrier plate 1 lock. Through this the sockets 10, 11 are locked in the carrier plate 1 in the radial slots 5 »6.

The end of the connections 21, 22 of the brushes 3, 4 that are connected to · not

100; 8d4 / uSu3 BAD ORIGINAL

Jtrorazufuhrkabei shown are connected, v / then grounded at eine..i Fixation "element 'd'o clamped.

The Bürstentruger geraäJj the invention is, as from the description emerges, on a simple 'support plate securely assembled. The fits are not subject to any hygrometric Influences and their Pührungsflächen are burr-free, so that the free Vera chi eblichlceit the brushes "during their wear is guaranteed.

Furthermore, enables the formed by releasable, elastic latching Fixing the sockets in the carrier plate avoiding other components, which was previously necessary for the installation the brush holder or holder was necessary.

The brush holder according to the invention is therefore particularly simple in its construction, in its assembly and in that a large number of previously necessary assembly elements are no longer necessary without compromising operational reliability and a effective work is impaired.

Without departing from the scope of the invention, the fits could be cast for the brushes with the carrier plate from a cord made of plastic.

BATH 10 983-4 / 0503 ■

Claims (4)

17635Ύ7 ~ - 8 claims: 1.) Brush part carrier for electrodynamic machines, comprising a - / the collector of the machine-encompassing carrier plate with a central recess for the passage of the collector and from this central recess extending radially outward Slots for guiding brushes sliding on the collector, characterized in that the brushes (3, 4) are longitudinally displaceable are arranged in sockets (10, 11}, which elastically latchable in the radial slots (5 »6) of the Support plate (1) are stored. 2. Brush holder according to claim 1, characterized in that the sockets (10, 11) are cast from a plastic material and have a central elongated recess (12) for guiding the brushes (3 »4). 3. Brush holder according to one of claims 1 or 2, characterized in that that on two opposite sides of the sockets (10, 11) in the longitudinal direction of the sockets (10, 11) extending grooves (13) are formed, in which edges (14) of the radial slots (5, 6) engage and thus the Hold the sockets (10, 11) in these slots (5, 6). 4. brush holder according to claim 3 »characterized in that elastic tongues (15, 16) pointing towards the circumference of the carrier plate (1) are provided in the extension of the grooves (13), 1098J4 / US03 BADORlGiNAL ■■■■: ■ .'..-. ■: _ 9 - which each with a gradation (18) in itself from the radial Slots (5, 6) near the circumference of the carrier plate (1) indentations (7, 8) widening in the circumferential direction can be latched are" 1O ¹ JB Ski UbL) 3 AQ Blank page