DE1513840A1 - Clip for electrode carbon - Google Patents

Description

6 Frankfurt am Main 70 June 6, 1966

Schneekenhofjlr. 27 - ul. 61 7079 HNION CARBXDB CORPORATION ClΛ υ for electrode carbons

OAe £ rfindiTr> $ refers to electric carbons and in particular on an improved clip for such coals

Such a clip is a component that is attached to an of the usual type, as is the case with electric motors, for example or generators are used, is used · He prevents üino AbnütziiK ^ the coal by applying the force of the pressure spring receives and serves as a guide; it is therefore often used as a spring clip boKoichnet,

C3 is already a wide variety of clip arrays · In addition to use today several types of connections, xm the clip on the coal to be fixed. Its typical clip arrangement and connection is described in the article "A clip" in the publication CBI-1961 of the National Standard Manufacturers Association, published October 1, 1961. This arrangement consists essentially of a metal strip which is bent in such a way that it lies on top of the electrode carbon and is connected to one or more rivets on its sides. intended"

In the manufacture of such carbon clip arrangements, j but often certain difficulties on * Di · training you * rivet heads, who should be full of concern »is even for« inen Facheuuw

10 9125 / 074β ^{SAD GRIÖ! NAL}

difficult to fill out. With carbon or graphite brushes, breaks often occur in the area of the riveted connection because the brush or carbon is heavily stressed and weakened during the necessary connection process . Operation loosens, or with a dürstenbrueh in the engine οo.or generator $ al & r.gt and there during operation serious * haf'io damage vcrux * cach'fc ·

To avoid these disadvantages, oan has different clips Connections developed that do without rivets, but are the results are unsatisfactory because these connections do not withstand the vibrations and shocks that occur in normal operation have withstood. Also, these connections often cannot be used with divided brushes.

The main object of the invention is to improve a pirate clip connection. You should not make use of minrnr Never "te or ähnliehen fasteners was securing make the clip on the brush and can be dennooh easily even at below · shared brushes. The brush connection should be robust and cheap and should be able to be produced without great difficulty.

Further advantages, features and possible uses of the New invention can be seen from the representations of an exemplary embodiment and the associated description.

Ss shows:

Fig. 1 is a perspective view of the erfindungsgeeäöen Bur's t en clip arrangement,

• 09826/074 S 8ADORiOlNAU

2 «ine perspective illustration of a brush wit. an incorporated groove, and

Pig. 3 is a perspective view of the invention. moderate brush-clip arrangement with a divided brush "

Bio orfiidunal goals are achieved with a brush clip arrangement of a carbon, graphite or metal graphite brush by a groove worked into one of its sides, and by a clever clip that engages the groove in such a way or in the burst ο is locked · Ottr protruding · Part of the clip is aa designed that it extends parallel to the upper surface of the brush and optionally over its edge · hiiv.usr & gt · The brush clip arrangement comprises at least one brush with a contact surface , one of these opposite surfaces and a side surface lying between this surface and the contact surface, the groove beginning on the upper surface of the brush and extending along the side surface; it also comprises a non-metallic clip, the coefficient of expansion of which is greater than that of the burst "" in which the groove is formed, this clip being shaped so that it extends along the upper surface of the brush and the groove and clip so one on top of the other are matched, since the clip is held in the brush in the manner of a lock.

Pig x 1 is a carbon "· or graphite brush 10, is incorporated into the Be · tenflüchö Ik eÄr.e groove 12th The groove begins on the surface iS, which is located opposite the contact surface, and ends on the side surface Xk at point 20 in FIG

"09136/074"

a certain distance from the upper surface Xn of the groove 12 a clip 22 is arranged; it preferably protrudes over dl · above · Area 16 of the burst «10.

The groove 12 and the clip 22 are designed to wipe they have a firm connection when they tmiwiiwontlTt are .: This is achieved by a locking arrangement between clip and groove like "in ·· do not loosen yourself"

the seat. According to another alternative dl · courage can also be achwalbonachwaniförtaig worked out or undercut _(and Aufnahae an appropriately geforaten clip · serve · Beispielsireise a clip with a broad · ve »IS ₁ w la a groove securely held, the width to O" 115 «· smaller than the · clip 1st.

Fig. 2 illustrates a "S * hw" lb "nsehw" nsnut 12 "dl · favorably by a width d in the upper fly 16 of the Brush extends into it, waving ·! the width d is equal to or greater than the thickness of the clip used · 1st.

Fig «3 Selgt a divided brush With the brushes IO end 24,

A clip 22 ”is in the hit, not shown, of the buret 10 and extends over the OberfIehe 1 ^, so that it «laen Part of the surface 16 of the brush 8% covered. On this VeU The clip 28 serves as a guide for the brush 24 and on the side

on the same side the finger of the spring, not shown, to prevent the brush from being worn down "

To assemble the inventive arrangement only needs to be done the clip 22 can be inserted into the groove 12 on the surface 16 under light pressure. In order to esjp ··· doors ensure a firm slts su should dl · Mr «lt ·

• 0 $ l2 6AD0R1GINAL

of the clip is big enough «or the edge angle must be counted in this way be sure that there is a sufficient start when inserting lent pressing is available in this way are costly Long, time-consuming and unnecessary steps such as of attaching a rivet, avoided.

Clip can be made from any “suitable” non-metallic Material, but its thermal expansion * »coefficient must be greater than * that of the brush material. ! Sin clip material made of plastic or an equivalent material is because of its ability to withstand shock, vibration and Wear beneficial; in addition, it does not cause any erosion or other electrical damage in the event of a fracture, since it is electrical is non-conductive. When used with a multi-part The brush also has the advantage that both brush halves Run essentially the same current · This is improved to 41 · cn guide properties of non-metallic clip attributed when he looks in contact with the metallic The spring finger is also located as a result of the flexibility of the plastic or equivalent Materials Improved Some of these equivalent materials that are suitable for constructing the clip * according to the invention general elastomeric materials polypropylene, nylon, nylafil *, Teflon **, fiberglass and melted fibers as well as love Materials· .

To prove the effectiveness of the present ferfinduag let elm « Series of attempts have been made · At the first attempt Several clips of the embodiment shown were au * three

and * ° registered US-Varenselchen

• 09825/0746

different. Materials, including polypropylene, nylon, and Metal, by means of a · viscoshwansftfrmlgan tore-old »it attached to same brushes, and these arrangements were made in a normal machine exposed to strong vibrations at extra * different temperatures · Oa * Ir result of this The series of tests is shown in Table X. Di · svelte test series included measurements of the ostomy bottom in each Brush sections of a subdivided burst · «where a nylafil clip in a swallow's swans clamp connection with a standard riveted metal clip for a lower part th brushes to be compared 1st · The test was carried out at awei different burst currents, namely at 75 and at 175 Asip carried out. Table 2 shows the current flow from the brushes • l »" negative '· and the current flow into the brushes as "positive" designated. .

BAP OHlGlNAL

109126/0748

Tabel VibrationsVFest

material

Polypropylene clip

ft Clip
η If η ti η ft π η * il
η Il It

No * vibrations millions

Clip temperature

Results Swallow swana metal

7 7

7 21

7 7

7 21

21

80

-80 ° C bi

8O ⁰ C

80 ⁰ C

140 ⁰ C

; until

80 ⁰ C

80 ⁰ C

Arrangement fixed

η ti -Λ η η cn —Ν It ti co
OO Il η -l>
O ft ti ti ti η H

All clip · extraordinarily * lent loosely

Remarks

l) The same clips were used for the three temperature tests ν The brush and clip were inserted into the dry β bite until the clip *

temperature (after about 15 min.) nit -80 ° C was measured »then were . si «under infrared» irradiation (1% O ° C) on a vibrating machine brought and tested for 1 hour. This treatment was repeated until 7 million vibrations were reached *

Table 2 Current difference in amperes - long to short plate

CD CO IO

75

Material no negative

Readings Difference (Amp.) Mean Min Max

Solid metal nylafil

10.2 6 6.9 O

positive

difference

(Amp.)

Mid · Min. Max.

19.7 O 15.1 2

30 24

Amp

negative

difference

(Amp)

Miit. Min. Max.

33 »9 12
20.7 6

50

positive

difference

(Amp.)

Mitt. Mia. Max.

41.7
3%, 5

Table 1 shows that the arrangement according to the invention is extreaen Resists vibrations. Furthermore, it arises from it thatA »on Better results are obtained if the clip is made of non-metallic material Materials such as nylafil or polypropylene are breathable. Also will the arrangement hardly influenced by temperatures, dl «far outside of the actually occurring operating temperatures nc The information in Table 2 shows that the invention Arrangement with a divided brush with respect to the Power distribution smell the brushes outstanding properties Has.

The assumption is that the connection according to the invention even becomes even stronger under normal operating conditions, and this distinguishes it from the properties of the connections known up to now. This change in severity arises from the fact that the mechanical forces acting on the clip wipe the clip and the courage. vmrgtb & wn search · Since the 'clip is made of a' material 'with a hShertn Teatper * 4 more efficiently than the brush, it expands. Operation as a result of the increase in heat of the machine and the tfcagebungaluft, so that a tighter connection snrieoben clip and bristle. Furthermore, the operation is the force of the Fedex finger or hammer on the clip in a direction in which the clip is pressed into the groove, so that this also results in a stronger and stronger connection.

Further modifications are within the concept of the invention possible, for example, near the bottom of the groove Hole can be drilled and the clip can be pressed in «.so that he forms an anchor in the pre-drilled hole and the Arrangement gives such a firm hold As already mentioned

BATH ORIGINAL

10-9826 / 0746

- ίο -

suggests, the dovetail groove can preferably also be formed in a rear-cut groove and an appropriately shaped clip. Although the clip is normally preformed and inserted into the groove, it can also be melted directly into the groove the Darrteilung can a »r clip also long or shorter, br" lter or Achaaler be formed, or have a larger or smaller angle. Better results are obtained when the bottom surface of the clip touches the bottom of the groove, since then "a better hold against impact and vibration is achieved"

^6AD original 109126/0746

Claims (8)

Patent claims 1. Electrical brush-clip arrangement Bit at least one bit, one contact surface, one opposite to the contact surface Has surface and a side surface lying between the contact surface and the surface through a groove (12) that extends from the surface (l6) au «extends along the side surface (14), further by a non-metallic CXip (22), the coefficient of thermal expansion is larger than that of the brush in which the hat extends and which is shaped to extend along the Surface (16) extends and through a connection between groove (12) and clip (22), which the clip (22) in the brush (10) lock firmly 2. Arrangement according to claim 1, characterized thereby β t that the clip is firmly seated in the groove in a clamping area. 3. Arrangement according to claim 1 or 2, characterized in that that the clip and groove are designed in the shape of a half-tail are· 4. Arrangement according to claim 1, 2 or 3, characterized g e- k e η η indicates that the clip is made of an elastomer Material. 5 x arrangement according to claim 1,2 or 3, "characterized in that the clip is made of a composite of nylon and Paserglas material ₀ 6. Arrangement according to claim 1, 2 or. 3 »characterized by that the clip is made of a plastic material 909825/0746 8AD ORIGINAL 1513640 7 · Brush clip whitening with a «hardest brush» on «contact surface, a "opposite the contact surface" surface and one between this surface and. the contact surface has a lying side surface, thereby identifying it net that the first brush has a hat, dear Surface begins and extends along the side surface «that also a non-metallic clip (22) with a thermal Expansion coefficient, which is greater than that of Brush (ClQ) sits in the groove and is shaped in such a way that it is extends along the Oborflfcche (16), and that the groove and the clip are designed so that the clip in the first Bilra.te (10) is locked firmly that also a «wide Brush (24) is electrically connected to the first brush. and is arranged in such a way that at least under one Ab> -, cut of the clip (22). 8. Arrangement according to claim 7 "d ad u r e k" ι ι k · η η * let ch η e t that the clip <22) IM a Vorrlegelungssits Eating in the groove. . "... · ■. Arrangement according to claim?. or _x 8. » _. since 4 ^ h r'c β ··· ■ "; denotes that 4er citp (ώ) upd djt · *** - \ - ■ ,; /: ^ swallow-swan-like "beef": J · '· ^{:. v} '• PSI26 / 074 ·