DE964526C - Multiple brushes made of mutually movable partial brushes for electrical machines - Google Patents
Multiple brushes made of mutually movable partial brushes for electrical machinesInfo
- Publication number
- DE964526C DE964526C DER16584A DER0016584A DE964526C DE 964526 C DE964526 C DE 964526C DE R16584 A DER16584 A DE R16584A DE R0016584 A DER0016584 A DE R0016584A DE 964526 C DE964526 C DE 964526C
- Authority
- DE
- Germany
- Prior art keywords
- brushes
- electrical machines
- mutually movable
- brush
- movable partial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000003292 glue Substances 0.000 description 2
- 241000238631 Hexapoda Species 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
- H01R39/24—Laminated contacts; Wire contacts, e.g. metallic brush, carbon fibres
Landscapes
- Motor Or Generator Current Collectors (AREA)
Description
Es ist bekannt, in Bürstenhaltern für elektrische Maschinen Mehrfachbürsten an Stelle von normalen Einfachbürsten zu verwenden,, um den Kontakt zwischen Bürste und Stromwender zu verbessern. It is known to use multiple brushes instead of normal brush holders for electrical machines Easy to use brushes, to make contact between brush and commutator.
Bild ι zeigt schemätisch die normale Einfachbürste undFigure ι shows schematically the normal single brush and
Bild 2 die gleichfalls bekannte Anordnung einer Mehrfachbürste, in diesem Fall einer Zwillingsbürste. Figure 2 shows the well-known arrangement of a multiple brush, in this case a twin brush.
α ist der Stromwender, b oder bv b2 die Bürste, c der Bürstenhalterkasten und d der Druckfinger. Werden die Mehrfachbürsten etwa wegen einer Nachprüfung aus dem Halter genommen, so muß darauf geachtet werden, daß die zusammengehörenden Teilbürsten auch zusammenbleiben, denn die Bürsten verschleißen nicht völlig gleichmäßig, so daß bei Verwechslungen Teilbürsten verschiedener Länge zusammenarbeiten müssen, was praktisch bedeutet, daß nur die längste auf den Stromwender gedrückt würde und allein den Strom übertragen müßte.α is the commutator, b or b v b 2 the brush, c the brush holder box and d the pressure finger. If the multiple brushes are taken out of the holder, e.g. for a check, care must be taken to ensure that the partial brushes that belong together also stay together, because the brushes do not wear out completely evenly, so that if mixed up, partial brushes of different lengths have to work together, which in practice means that only the longest would be pressed on the commutator and would have to transmit the current alone.
Bei großen Maschinen mit zahlreichen Bürsten,For large machines with numerous brushes,
z. B. bei Bahnmotoren, ist es schwierig, Verwechslungen zu vermeiden, zumal da auch meist nur wenig Zeit für die Bürstenrevision zur Verfügung steht. Derartige Bürsten werden auch normal unarmiert, d. h. ohne Anschlußseile geliefert, mit denen man sonst die Teilbürsten zusammenhalten könnte, sondern der Strom wird vom Druckfinger d abgenommen.z. B. with rail motors, it is difficult to avoid mix-ups, especially since there is usually only little time available for the brush revision. Such brushes are also normally unarmoured, ie supplied without connecting cables with which the partial brushes could otherwise be held together, but the current is taken from the pressure finger d .
Man hat bereits versucht, unarmierte Teilbürsten durch Klammern oder Bindungen zusammenzuhalten, doch haben sich alle diese Anordnungen nicht bewährt, und'zwar aus folgendem Grunde: Der Vorteil der Mehrfachbürste ist nur dann gewahrt, wenn die Teilbürsten eine gewisse Beweglichkeit gegeneinander behalten. Die Verbindung • muß das berücksichtigen; sie kann also nur locker mit den Bürsten verbunden sein. Infolge der unvermeidlichen dauernden Erschütterungen der Bürsten im Betrieb scheuert sich aber jede lockere Verbindung auf die Dauer durch. Bei metallischen Verbindern besteht dabei noch die Gefahr, daß Einzelteile auf den Stromwender oder in die Maschine geraten und dort Schaden verursachen. Außerdem werden die ohnehin dünnen Teilbürsten durch die für die Verbinder nötigen Bohrungen oder Ausfräsungen in unerwünschter Weise geschwächt. Attempts have already been made to hold unarmoured part brushes together using clamps or bonds, but none of these arrangements have proven effective, and indeed for the following reason: The advantage of the multiple brush is only preserved if the part brushes have a certain mobility hold against each other. The connection • must take this into account; so she can only loosely connected to the brushes. As a result of the inevitable Continuous vibrations of the brushes during operation, however, rub off any loose ones Connection in the long run. With metallic connectors there is still the risk that Individual parts get onto the commutator or into the machine and cause damage there. In addition, the already thin part brushes are through the holes required for the connector or millings weakened in an undesirable manner.
Erfindungsgemäß werden alle diese Nachteile vermieden, und es wird trotzdem eine elastische, ausreichend bewegliche und dennoch genügend haltbare Verbindung der Teilbürsten erreicht.According to the invention, all these disadvantages are avoided, and it is nevertheless an elastic, A sufficiently flexible and yet sufficiently durable connection of the part brushes is achieved.
Dies geschieht durch Zusammenkleben der-Teilbürsten durch einen nicht erhärtenden·, sondern elastisch bleibenden Klebstoff, der etwa im oberen Teil der Bürsten angebracht wird, wie es in Bild 3 angedeutet ist. e ist der Klebstoff auf der Teilbürste b. This is done by gluing the partial brushes together with an adhesive that does not harden, but remains elastic, which is applied approximately in the upper part of the brushes, as indicated in Figure 3. e is the glue on the part brush b.
Bild 4 zeigt eine Seitenansicht einer Dreifachbürste "mit zwei Klebstellen. Die Klebschicht ist so dünn, daß ihre Dicke bei der Bemessung der Bürstendicke im allgemeinen· nicht berücksichtigt zu werden braucht, da die Bürsten ohnehin ein gewisses Spiel im Halter haben. Jedoch wäre es natürlich ohne weiteres möglich, die Bürsten um das erforderliche geringe Maß dünner zu halten.Figure 4 shows a side view of a triple brush "with two adhesive points. The adhesive layer is so thin that their thickness is generally not taken into account when dimensioning the brush thickness needs to be, since the brushes have a certain amount of play in the holder anyway. However, it would be of course it is easily possible to keep the brushes thinner by the required small amount.
Für die Auswahl des Klebstoffes ist wesentlich, daß er nicht erhärtet und seine Elastizität auch bei höheren Temperaturen, behält. Als Beispiel seien genannt: Gummilösungen, Harzlösungen, Klebstoffe für medizinische Pflaster, Insektenleime, Zelluloseazetat u. ä.For the selection of the adhesive it is essential that it does not harden and that its elasticity is also important higher temperatures. Examples are: rubber solutions, resin solutions, adhesives for medical plasters, insect glue, cellulose acetate, etc.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER16584A DE964526C (en) | 1955-05-08 | 1955-05-08 | Multiple brushes made of mutually movable partial brushes for electrical machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER16584A DE964526C (en) | 1955-05-08 | 1955-05-08 | Multiple brushes made of mutually movable partial brushes for electrical machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE964526C true DE964526C (en) | 1957-05-23 |
Family
ID=7399766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DER16584A Expired DE964526C (en) | 1955-05-08 | 1955-05-08 | Multiple brushes made of mutually movable partial brushes for electrical machines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE964526C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2154731A1 (en) * | 1971-09-30 | 1973-05-11 | Philips Nv |
-
1955
- 1955-05-08 DE DER16584A patent/DE964526C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2154731A1 (en) * | 1971-09-30 | 1973-05-11 | Philips Nv |
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