DE2822340A1 - ARRANGEMENT AND PROCEDURE FOR ATTACHING THE BRUSH PLATE TO THE LID OF A COLLECTORED ELECTRIC MACHINE - Google Patents

Description

Fabbrica Italiana magnet! Marelli S.p.Ao, Via Guastalla 2, Milan

Arrangement and method for attaching the brush bearing plate to the Cover of an electrical machine provided with a collector.

The present invention relates to an arrangement for attaching the brush bearing plate to the cover plate of an electric motor equipped with a collector for operating the windshield wiper of motor vehicles _{or the like}

The invention also relates to the mounting method for this brush holder plate O

usually at the collector electric motors for windshield wipers, the bearing plate or pedestal for the wiper to the cover plate of the motor by means of molded nylon pins and Vernie "is ten of pegs of the cover plate made or by other means, plural marriage a corresponding configuration of the cover require _o

All of these measures are carried out by means of facilities or devices made, which have a corresponding effect on the working hours and thus on the manufacturing costs of the engine.

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In addition, vibrations caused by the wiping movements of the windshield wiper on the collector are transmitted to the entire motor body, which increases the noise generated by the unit.

The object of the present invention is to create a method of attaching the windshield wiper holder plate to the cover of an electrical one Machine with a collector in general and especially in the case of an electric motor for windshield wipers, which does not require the use of

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requires special devices or machines, the assembly times are considerable shortened and the noise reduced.

The cultivation method according to the invention is characterized in that the brush holder plate is held on the cover of the machine by means of elastic means which are arranged around the edge of the plate and keep them separate from the fastening means on the lid.

These elastic means preferably consist of at least two Parts, each of which has a transverse groove into which the rim is elastically inserted and retained. At this one On the opposite side of the groove, at least two elastic elements have an axially extending groove into which a pin of the Lid engages as a centering element of the plate,

According to another embodiment of the invention, the brush bearing plate and the motor housing is held together on the cover by means of small metal plates which are attached to them by screws are.

According to the invention, the method of attachment of the brush support plate to the Cover the following process steps: placing the elastic elements on the plate, attaching the plate on the lid by means of small centering pins, closing the den Rotor containing housing with the cover, inserting the mounting plate in corresponding slots provided on the housing, so that on one side the support on the elastic elements and on the other hand on the housing and finally the simultaneous one Coupling of the brush support plate and the housing to the cover with the clamps of the platelets by means of the holes in the platelets inserted screws ,,

The invention is described in more detail below, for example with reference to the accompanying drawings, which show the mounting method show the brush support plate in an electric motor for windshield wipers,

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Fig. 1 is a partial axial section through the electric motor with brush support plate placed on the cover according to the invention;

FIG. 2 illustrates a sectional view along the line II-II of FIG. 1;

Fig. 3 shows the burst support plate with partially attached elastic means;

Fig. 4- is a sectional view through the plate according to Fig. 3 along the line IV-IV;

FIG. 5 illustrates a partial view of FIG. 1 on an enlarged scale Scale;

Figure 6 is a view of the individual assembly components of the brush support plate.

Referring to the drawings, numeral 1 is the cylindrical motor housing and 2 designates its cover plate, to which the brush support plate or the base 3 is attached, on which the brushes 4 are held sindo

In a known manner, the rotor 5 is mounted in the housing 1, on the shaft 6 of which the collector is placed at the plate 3. According to the invention, the brush holder plate 3 is placed on the bearing points 8 of the cover 2 by means of two elastic and insulating parts 9, which consist of two rubber half-disks which elastically encompass the edge of the plate at two opposite points corresponding to the positions of the bearing points 8 _o

As shown more clearly in Figs. 3 and 4-, points to the called the purpose of each of the rubber parts 9 a transverse channel 10 which with a corresponding recess on the edge of the plate 11 comes into engagement. The profile of the channel matches the recess, these recesses having a narrowed mouth 11a around an elastic one To achieve holder of the rubber part when this is put on. The narrowed mouth can be opened by means of an oval or round outlet.

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measurements larger than the semicircle can be obtained. thanks to this elastic holder, the plate 3 forms a unit together with the attached rubber elements 9.

The two rubber parts point to the opposite of the transverse channel 10 Side an axial groove or opening 12, in which a corresponding axial pin 13 engages, which extends from each of the bearings 8. These pins or pins, which are used to center the plate, are conical or tapered at the base towards the end, so that the insertion into the groove 12 of the rubber elements with a corresponding Tension happens and thus an elastic holder of the plate on the lid is created, which is very useful for the assembly of the parts proves advantageous «.

The attachment of the burst support plate 3 on the cover 2 is by means of two metal plates 14, which rest against the rubber parts 9 and are clamped to the cover by means of two screws 15 which are supported with the head 15a on the lid base.

For this purpose, each of the platelets 14 has a bore 16 for inserting one Screw 15 on. On one side 14a (inside) it is supported on a rubber part, on the other side 14b (outside) it grips into a transverse slot 17 of the housing 1 such that when the screws 15 are screwed into the bores 16, the plate 3 and the housing 1 can be held on the lid at the same time. On the inner side 14a the plates are fork-like to accommodate the centering pins 13, which also the radial locking of the plate during serve to assemble. The rubber parts 9 thus isolate the plate 4 both from the seats 8 and from the plates 14 and the screws 15 that hold the plate on the lid.

The assembly of the brush holder plate with the lid is in the Pig. 6 illustrates and assigns in order the following Steps on:

1. Insertion of the rubber parts 9 into the plate 31 so that the grooves 10 engage in the recesses 11;

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2. Placing the plate on the carrier 8 on the cover in such a way that the Centering pins 13 in the axial grooves 12 of the rubber elements and the centering pin 18 of the cover into the corresponding hole 19 the plate are used;

3. Closing the housing 8 with the rotor 5 on the cover in such a way that the housing edge 20 is supported on the round seat 21 of the cover and the transverse slots 17 are aligned with the webs 22 of the plate 14 are, with the slots on the lid are excluded;

4 ·. Insert the plates 14 into the slots 17 up to the pins 13 have reached the depth of the fork and then the plates with their side 14-a rest against the rubber elements and with the outside 14-b engage the slots 17;

5 · Simultaneous attachment of the brush holder plate and the housing on the cover by clamping the plates 14- on the cover by means of the Screws 15, which engage in the holes 16 of the plate, while they are held with the heads 15a on the lid base.

According to the embodiment, elastic organs were insisted on referred to as two rubber platelets, but it is obvious that more than two platelets can be provided or by an elastic one Ring can be replaced, which is stretched elastically on the edge of the plate.

Likewise, the shape of the rubber elements with the transverse groove on the curved part and the axial groove on the flat part can be designed or arranged differently.

Claims

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Claims (9)

Patent claims / i. Method of arranging the brush holder plates on the lid of a \> __ yelectric machine with a collector, especially on an electric motor for windshield wipers for motor vehicles, characterized in that this plate is attached to the cover by means of elastic, on the edge of the Plate provided means is held, which also keep them separated from the fasteners on this cover. 2. The method of arranging according to claim 1, characterized in that that the elastic means consist of at least two suitable elements, for example rubber plates, each of which is one Has transverse grooves into which the end of the plate is inserted and held elastically. 3. Arrangement for the holder according to claim 2, characterized in that that the groove of each elastic element has a fitting profile to a corresponding recess on the edge of the plate, wherein each recess has a narrow mouth for elastic radial support of the element after its insertion. 4-, method or arrangement for assembly according to claim 3 »characterized in that that the groove of each elastic element and the recesses of the plate have a substantially circular profile with a larger extension of the semicircle. 5. Method of assembly according to claims 2 and 3 »characterized in that that at least two elastic elements on the side opposite the groove have an axial groove into which a Pin of the lid engages as a centering element for the plate, each pin protruding from the seat of an elastic element O 6. A method of assembly according to claim 5 »characterized in that 609849/0737 the centering pins have a shape decreasing from the base to the end have and come into operative connection with the axial grooves of the elastic elements by means of clamping, so that an elastic axial The plate is held on the lid when it is put on. 7 · Method of assembly according to the preceding claims, thereby characterized in that the fastening means of the brush support plate on the cover consist of small metal plates, which the elastic Pressurize the agent and attach it to the lid with screws, these plates having a fork shape on the inside for receiving the centering pins which form the holding means in the radial direction during the assembly process. 8. A method of assembly according to claim 7i, characterized in that that the fastening plates of the brush holder plate with their outside also the housing of the electrical machine on a seat hold on the cover if these are jammed with the screws « 9. A method of assembly according to the preceding claims, characterized characterized in that the elastic organs have the shape of a semicircular disc with a transverse groove on the curved side and one have axial groove on the flat side. Oo procedure for assembling the brush holder plate on the lid according to the preceding claims, characterized in that the following work steps are carried out: Inserting the elastic members in the edge of the plate, mounting the plate to the D _e ckel by means of centering pins, closing the rotor overlying housing with the lid, inserting the support plates into corresponding slots of the housing, so that the latter on one side on the elastic elements and rest on the other side on the housing and, finally, at the same time securing the brush carrier plate and the housing to the D _e ckel under the mounting plate on the cover by engaging in the holes of the plate screws. 809849/0737