DE313299C - - Google Patents
Info
- Publication number
- DE313299C DE313299C DENDAT313299D DE313299DA DE313299C DE 313299 C DE313299 C DE 313299C DE NDAT313299 D DENDAT313299 D DE NDAT313299D DE 313299D A DE313299D A DE 313299DA DE 313299 C DE313299 C DE 313299C
- Authority
- DE
- Germany
- Prior art keywords
- web
- dovetail
- holes
- commutator
- lattice
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 description 2
- 230000001771 impaired Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 241000255947 Papilionidae Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001264 neutralization Effects 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
- H01R39/04—Commutators
Description
Es ist bekannt, bei Stromwenderstegen aus Kupfer, Rotguß ο. dgl. dadurch an Material zu sparen, daß man nach Fig. ι in dem schwalbenschwanzförmigen Teile Aussparungen α vorsieht. Durch solche Aussparungen wird aber das Widerstandsmoment des Steges derart geschwächt, daß der Steg, insbesondere wenn er abgenutzt ist, den durch die Preßdrücke und die Fliehkräfte hervorgerufenenIt is known for commutator bars made of copper, gunmetal ο. Like. To save material by providing recesses α in the dovetail-shaped parts according to FIG. Such recesses, however, weaken the section modulus of the web in such a way that the web, in particular when it is worn, compensates for that caused by the pressing pressures and the centrifugal forces
ίο Beanspruchungen nicht mehr gewachsen ist. Nach der Erfindung wird der Schwalbenschwanz gemäß Fig. 2 mit durchgehenden Löchern b versehen, so daß der Steg gitterartig ausgebildet ist und Verbindungsstege c und d aufweist, die die am Steg beanspruchten Fasern in möglichst ■ große Entfernung von den neutralen Fasern bringen. Es kann so erreicht werden, daß bei den im allgemei-. nen aus gezogenem Material in einer bestimmten radialen Höhe hergestellten Stromwenderstegen das Widerstandsmoment nur etwa ebensoviel abnimmt, als die durch das fehlende Material verminderte Biegungsbeanspruchung gegenüber der Fliehkraft. Auch die Schwalbenschwänze selbst werden in ihrer Widerstandskraft nicht oder nicht wesentlich beeinträchtigt. Die gebrochene Linie A-B-C in den Figuren stellt die Begrenzung des abgenutzten Steges dar. ' . ·ίο is no longer able to cope with the stresses and strains. According to the invention, the dovetail as shown in FIG. 2 is provided with through holes b so that the web is designed like a grid and has connecting webs c and d which bring the fibers stressed on the web as far away as possible from the neutral fibers. It can be achieved that in the general. nen commutator bars made of drawn material at a certain radial height, the moment of resistance decreases only about as much as the bending stress compared to the centrifugal force, which is reduced by the lack of material. The resistance of the swallowtails themselves is not impaired, or not significantly impaired. The broken line ABC in the figures represents the boundary of the worn bar. '. ·
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE313299C true DE313299C (en) |
Family
ID=566173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT313299D Active DE313299C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE313299C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3048470A1 (en) * | 1980-12-22 | 1982-07-01 | Kautt & Bux Kg, 7000 Stuttgart | "COMMUTATOR AND METHOD FOR THE PRODUCTION THEREOF" |
WO2004098000A1 (en) * | 2003-04-29 | 2004-11-11 | Robert Bosch Gmbh | Electric manual machine tool driven by an electric motor |
-
0
- DE DENDAT313299D patent/DE313299C/de active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3048470A1 (en) * | 1980-12-22 | 1982-07-01 | Kautt & Bux Kg, 7000 Stuttgart | "COMMUTATOR AND METHOD FOR THE PRODUCTION THEREOF" |
WO2004098000A1 (en) * | 2003-04-29 | 2004-11-11 | Robert Bosch Gmbh | Electric manual machine tool driven by an electric motor |
US7196440B2 (en) | 2003-04-29 | 2007-03-27 | Robert Bosch Gmbh | Electric manual machine tool driven by an electric motor |
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