DE313299C - - Google Patents

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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
Application number
DENDAT313299D
Other languages
German (de)
Publication of DE313299C publication Critical patent/DE313299C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00Rotary current collectors, distributors or interrupters
    • H01R39/02Details for dynamo electric machines
    • H01R39/04Commutators

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)

Patent-Anspruch: ■Patent claim: ■ Stromwendersteg für elektrische Maschinen, dadurch gekennzeichnet, daß der schwalbenschwanzförmige Teil mit durchgehenden Löchern beliebiger Form ver- sehen ist, so daß der Steg einen gitter- * artigen _ Charakter erhält, zum Zwecke, ohne Verminderung der Festigkeit eine Ersparnis an wertvollem Material zu erreichen. Commutator web for electrical machines, characterized in that the dovetail-shaped part with through holes of any shape can be seen, so that the bridge has a lattice-like character, for the purpose of to achieve a saving in valuable material without reducing the strength.
DENDAT313299D Active DE313299C (en)

Publications (1)

Publication Number Publication Date
DE313299C true DE313299C (en)

Family

ID=566173

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Application Number Title Priority Date Filing Date
DENDAT313299D Active DE313299C (en)

Country Status (1)

Country Link
DE (1) DE313299C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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