DE1463883A1 - Spring tongue brush for small electric motors or generators - Google Patents

Description

Dipl.-Ing. Π. Bo- M u.

Diploma- Ing.Lemprecht 1 A 6 3 8 8 MGnchwi 22, Staimdorfctr. 10

G1-9328P.-SfGr (O) October 21, 1968

II 51 918 VIIIb / 2iai

Fedcrzuncenbürstc for electrical KIU inetmotore c of the generators

The invention relates to a spring lock brush for olekt ^ iochs Kleinotmotore or generators auo one sided clamped metal foil whose froiea end under inherent elasticity rests against the rotating commutator.

VIotorc r,: it PederzungebUrsten of this kind are in the German. Utility model 1 793 005 and in the French. U.S. Pat. 1,252,508. These known spring tongues have one in practice Sicite from 3 to 4 run and a thickness of 0.4 to 0.5 well, are alfjc to be addressed thinly in the common sense. Nevertheless, they are able to meet the practical needs of the operation of micro motors or generators, especially with regard to their service life, do not apply satisfy ο

They are practically the result of a compromise which one has concluded between two opposing demands, namely by using these spring-tongue brushes on one side out of your endeavor to give them a low level of rigidity and thus the opportunity to bestow the inevitable To follow the fluctuations of the commutator surfaces, as thin as possible,

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but from the consideration that thin brushes are worn down by the inevitable wear and tear and become unusable, again huoh don't cut too thin wanted to.

It has now been shown in practice that siofa with UiIfβ this compromise for the dimensioning of the spring tongue brushes can only achieve lifetimes of 10 to 100 hours and such a value is often unacceptable in practice, other approaches have to be taken to solve this problem taken "inden oan according to the German model. / iuslegeechriften 1,085,956 and 1,133,024 separately held cantilevered PedereungenbUreten provided for resiliently formed holding elements, such as supporting arms or fins, nit a circulation of a CEHR hard material of considerable strength door Removal or for the supply of the current to the collector that has notor or generators.Tfeiee can zvtcx mitigate the above-mentioned service life problems, ^ but this advantage is bought with complication for the installation of the pantograph, which inevitably increases the susceptibility to failure and makes maintenance more difficult, eo that also the ilotore and generators equipped in this way are not able to fully satisfy in practice

Starting from this known hour of technology, the invention is therefore based on the object of providing a spring suspension to be further developed in the manner mentioned at the beginning, that eiö with complete retention of their self-supporting character for a week

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lent increased lifespan compared to the better known leather tongues of this kind

This task is invented by the invention that the 7-rides of the tongue are 0 _f 5 and 4 2 ob and their bioin "between 0) 05 and 0.25 sa"

The ür indtins teaches alao a considerable reduction in the ' compared to previous practice and “is with it

in a direction in which a solution to the blending problem is even less was to be expected than had to be assumed that they would open In the same way, there is a lower level of risk on the surface of the outer surface would lead even more to the disgust of the Eungen. . '·

tyürraschenderweise ΆζΛ now eioh but just the opposite herausgestelltι the erfindungsgeoäSe Terrlngerung the gebrftueh- 1 cozy ZiUngenabmcBsungen on Bruobteile which gives g * n * uaHcrordentllohe increasing the life that at ocindeatsne 50G0 bio COQO operating hours, in favorable cases AUOH up en 8000 Betrie bestunden amounts to·

A obicher advance was for erfindungegenä8en K Kcn but that äucb uftso less eu expect because you cußte annehaen, & O.B such thin tongues nioht were rersohleiöen only faster than diokere, eonderh auöeniem disorders duroh Te ^ blegungen, 3i "I and displacements under iUiOeren forces, such as Λ er Sentrlfugal ^ xeift on the rotiore / ulea XoXXOOtBtOr ₁ bit sloJi

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bring were · All these fears have eloh jtdooh as well Surprisingly, it turned out to be unfounded Generators reward aioh nloht only you raw a long untarterl without operational capability, but also due to a very low susceptibility to failure.

A further explanation of the invention will now be given Leading example for an inventive counterfiS spring sung brush You will hear and be criticized about the resulting Yersuoh results, which are presented in the Yeranechaulioht reward

Fig «1 the dependence of the service life of a ate from the brush brush {

flg. 2 the dependency of the Koaautatorabmffcsctng τοη the etenbreitei

Flg. 3 the abliüngigkoit der! «Duration of a Fedsrcangen ate tone of the bucket dioke;

Fig. 4 shows the dependence of the Konmitatorabsfftsang τοη stendioke;

Fig. 5 shows an obaroctery-like error for the intensity of the electrical disturbance frequency spectrum or the disturbance level

«X> depending on the τοη of the bucket dioke» -

~ t Fio ^r · 6 a bohemian representation of a genome of the

^ dung executed spring singsb & xst ··. -

w From Fig. 1 the sieving mix of the brushes is wide »

and the office lifespan is considerable, "ie si" eioh aas ents ■ ohenden Yorouohen resulted in · The? n these Vereaa & en need «Dl

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gates were made of a »silver pelladium alloy n« rg «et« llt | dl Brushes were made of a platinum-iridium alloy and had a

0.1 mm bead, the rotation speed of the commutators was 9000 rpm.

... · «· ■■ ..
Which are worth the life expectancy from the curve representation

Mean values from the experiments with swel Tersuohemotoren

In Fig. 2, the relationship is also the Buratembrelte and the wear of the commutatoses shown in similar Tests have been determined that the width of the width of the door is equal to the thickness of the commutator mute influenced to a large extent *

The relationships between the dioke and the brush life result from the illustration in Fig. Brushes that are more than 0.1 mm thick are more familiar with the titanium ions of the commutator and constantly maintain good contact conditions because their elastic suspension is smaller. The brush with larger blocks often makes contact with the Commutator, where there is no arc, odor your / iuflagedruok on the commutators lot m large, which also increases the wear and tear of the Koomutator. As a result, seSmbe brushes cannot achieve a long service life. Andereeits is a brush whose bleat small al · 0 ₉ 1 mm ", 1st retort to the inevitable vrund Abnutsung fast,"";'eo DAJ their LebenBdsmer lat also rate ·''''" ^v -'"···. ·· * ·

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Ana of Fig. 4 is the relationship nrlsohea the brush sheet the commutator abnvtsiaiig to be taken · given feeter

stenbrcite takes the Romrauntorabutut in direct proportion * u the burst dioke su

The last graphical representation in Pig · 5 shows that auoJl a relationship between the entrance locomotive and the intensity of the electrical interference or the interference level exists · The increasing Damage or wear and tear of a brush during operations "be" If there is also electrical interference, "haste the guarantee as a result of their damage or wear and tear on the elastic Xlaetlzittt loses and a bad contact results · The iwlBoben of the BQr * G te and the commutator as a result of the poor contact ·· occur » the small arcs are responsible for the ·· electrical »disturbances ·

A design bracket of a spring-loaded shoulder similar to the present invention is shown in FIG. 6. The feather* Aungenburete 1 is on one side of a holder 2 which is to order conductive material, it forms a spring tongue that is clamped in on one side. of a plat in-iron alloy j it has a width of 1 w and a Dioke of 0.25 a material exists, reaches a «lifetime γοη 8000 Standen · '

As can be seen from the ▼ orangegangeneη description , the

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Invention the result of careful examinations and experiments bet "· dee study of the results of this verse snob · Ana de" Experiments could infer "ground" that Vedersungenbttrsten have a width of 0.5 to 2.00 a * and a thickness τοη O ₉ OS bis 0.29 ■■, so that they have the desired long life span · if the brush material is concerned, also has a large flower and the life of the brushes, the alloys Flatln-Iridiua, Silver-PalladluB, silver- ittokel and Öold-Silber have proven to be very suitable

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Claims (1)

Potcntaneproob . ■ κ> Fcder to be installed for electric micro motors or generators made of a metal foil clamped on one side, the free charge of which lies under iron elasticity in the circumferential KoanatQtor ,
3. «. through |. ' ckc η η ι e 1 ο Ii η β t, defl the width of the Iv.y.ßc zvjiachen 0.5 and 2 Ba and their dioke swloehen 0.05 and 0.25i ^ lie New subjects __ 909815/0331 ORIGINAL BATHROOM