WO2009021904A1 - Electrical machine having an apparatus for securing a stator - Google Patents

Electrical machine having an apparatus for securing a stator Download PDF

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Publication number
WO2009021904A1
WO2009021904A1 PCT/EP2008/060412 EP2008060412W WO2009021904A1 WO 2009021904 A1 WO2009021904 A1 WO 2009021904A1 EP 2008060412 W EP2008060412 W EP 2008060412W WO 2009021904 A1 WO2009021904 A1 WO 2009021904A1
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WO
WIPO (PCT)
Prior art keywords
stator
fastening device
machine housing
clamping
housing
Prior art date
Application number
PCT/EP2008/060412
Other languages
German (de)
French (fr)
Inventor
Rainer Stoeckl
Thorsten Rohwer
Alexander Bawidamann
Matthias Gebhard
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009021904A1 publication Critical patent/WO2009021904A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor

Definitions

  • the invention relates to a fastening device for a stator according to the preamble of patent claim 1.
  • Such a fastening device has become known for example from DE 103 32 957 A1.
  • Figure 1 is a schematic longitudinal sectional view of an electric machine with a stator according to the invention according to the section line I- 1 in Fig. 2.
  • Fig. 2 is a schematic plan view of the electric machine of Fig. 1; 3 shows the stator fastening according to the invention in an enlarged plan view according to the detail III in FIG. 2; and FIG. 4 shows the stator fastening according to the invention in an enlarged view
  • FIGS. 1 to 4 an electric machine with a stator mounting according to the present invention will be described.
  • the electric machine is an EC motor used in a vehicle.
  • Fig. 1 is a sectional view taken along the line I-I in Fig. 2, and Figs. 3 and 4 are enlarged views according to the detail III in Fig. 2 and the detail IV in Fig. 1st
  • the in Fign. 1 and 2 shown electrical machine 1 comprises a cylindrical machine housing 2, a stator 3 fixed therein, a rotor shaft 4 with a permanent magnet 5 disposed thereon and an electrical plug connection, not shown.
  • the machine housing 2 is cup-shaped and closed at its open side with a cover element, not shown.
  • the rotor shaft 4 is mounted at its two ends in two bearings 6, wherein the provided on the open side of the machine housing 2 bearing 6 is fixed by means of a support member 7 on the machine housing 2.
  • the torque of the rotor shaft 4 can be removed via a toothing 8 at the end of the rotor shaft 4 facing the open side of the machine housing 2.
  • the stator 3 comprises, in a known manner, a sleeve-shaped stator housing 9, a stator lamella packet with windings 10 fixed therein and a sensor block (not shown).
  • the stator 3 is inserted axially into the circular opening 11 of the machine housing 2 until the stator housing 9 bears against an annular shoulder 12 of the machine housing 2.
  • the machine housing 2 may also have a plurality of non-circumferential stops.
  • the attachment of the stator 3 in the machine housing 2 is effected by three clamping claws 13 which are screwed to the machine housing 2 and the stator housing 9 am Clamp the annular shoulder 12 axially.
  • the three clamping claws 13 are each arranged equidistant from each other in the circumferential direction of the machine housing 2.
  • FIGS. 3 and 4 illustrate the attachment between the machine housing 2 and stator 3 by means of a clamping claw 13 in detail.
  • the clamping claw 13 is screwed by two screws 14 frontally on the machine housing 2 and clamped with its free Pratzenende 15, which is directed radially inward and the stator housing 9 engages behind in the direction of insertion of the stator 3, the stator housing 9 axially fixed to the annular shoulder 12.
  • the free Pratzenende 15 engages accurately between two lateral stops 16 of the stator housing 9, whereby the stator housing 9 within the machine housing 2 rotatably about the rotor axis 17 (Fig. 1) is fixed.
  • the two stops 16 are formed by two parallel side walls of a recess 18 which is provided in the end face of the stator housing 9 and is radially outwardly open.
  • the distance between the two side walls 16 corresponds to the width of the free Pratzenendes 15.
  • the clamping claws 13 engages with its free Pratzenende 15 positively in the recess 18, whereby the stator housing 9 is fixed both axially and rotationally fixed in the machine housing 2.
  • the free Pratzenende 15 has a projecting towards the stator housing 9, extending in the circumferential direction embossing 19, with which the clamping claw 13 on the stator housing 9, i. on the bottom 20 of the recess 18, linearly applied.
  • This linear system makes it possible to exert a defined axial pressure with the clamping claw 13 on the stator housing 9 and to compensate for axial thermal expansions.
  • the screws 14 are screwed into threaded holes (slots) 21 of the machine housing 2, whereby - to a limited extent - the position of the stator 3 can be adjusted axially or adjusted.
  • the threaded holes 21 have in their adjoining the clamping claw 13 area a clearance 22, ie a section without thread on, so that the Screw 14 can easily bend.
  • the screw 14 then acts like a spring, and bending stresses are significantly reduced.
  • the clamping claw 13 has between its embossment 19 and the screws 14 on both sides in each case a constriction 23.
  • the dashed line indicated in Fig. 3 connecting line 24 between the two constrictions 23 defines the bending line of the free Pratzenendes 15, whereby the bending load is significantly reduced below the screw heads.
  • the connecting line 24 also serves as a possible predetermined breaking point in heavy overload in case of failure.

Abstract

In the case of an apparatus for securing a stator (3) in an opening (11) in a machine housing (2), the stator (3) is, according to the invention, firmly clamped axially by means of at least two clamping shoes (13), which are attached to the machine housing (2), against an annular step (11) in the machine housing (2) or against at least two stops (11) which are not circumferential.

Description

ELEKTRISCHE MASCHINE MIT EINER VORRICHTUNG ZUR BEFESTIGUNG ELECTRICAL MACHINE WITH A DEVICE FOR FASTENING
EINES STATORSA STATOR
Stand der TechnikState of the art
Die Erfindung geht aus von einer Befestigungsvorrichtung für einen Stator nach der Gattung des Patentanspruchs 1 .The invention relates to a fastening device for a stator according to the preamble of patent claim 1.
Eine derartige Befestigungsvorrichtung ist beispielsweise durch die DE 103 32 957 A1 bekannt geworden.Such a fastening device has become known for example from DE 103 32 957 A1.
Bei dieser bekannten Befestigungsvorrichtung sind am inneren Mantelumfang des Gehäuses nach innen vorstehende Längssicken, die über die gesamte Länge des zylindrischen Teils des Gehäuses verlaufen, ausgebildet. Der Stator wird durch diese vorstehenden Längssicken des Gehäuses gehalten, wobei die Längssicken wie ein Federelement wirken und den Stator im Gehäuse festklemmen. Die Klemmkraft ist dabei derart groß, dass der Stator sich nicht relativ zum Gehäuse verdrehen oder in Axialrichtung verschieben kann. Die Längssicken sind am Umfang des Gehäuses jeweils gleich weit voneinander beabstandet, sodass eine gleichmäßige Klemmkraft auf den Stator ausgeübt wird. Durch diese Formgestaltung des Gehäuses kann der Stator ohne Kleben im Gehäuse befestigt werden. Offenbarung der ErfindungIn this known fastening device inwardly projecting longitudinal beads which extend over the entire length of the cylindrical portion of the housing, formed on the inner circumferential periphery of the housing. The stator is held by these projecting longitudinal beads of the housing, wherein the longitudinal corrugations act as a spring element and clamp the stator in the housing. The clamping force is so great that the stator can not rotate relative to the housing or move in the axial direction. The longitudinal beads are equidistant from each other at the periphery of the housing, so that a uniform clamping force is exerted on the stator. This shape design of the housing, the stator can be attached without sticking in the housing. Disclosure of the invention
Erfindungsgemäß wird vorgeschlagen, den Stator mittels Spannpratzen im Maschinengehäuse axial festzuspannen und insbesondere auch drehfest zu fixieren.According to the invention it is proposed to axially clamp the stator by means of clamping claws in the machine housing and in particular to fix it in a rotationally fixed manner.
Vorteile der erfindungsgemäßen Befestigungsvorrichtung sind: kostengünstige LösungAdvantages of the fastening device according to the invention are: cost-effective solution
Fixierung der axialen wie radialen Bewegung des Stators mit demselben BauteilFixation of the axial and radial movement of the stator with the same component
(Spannpratze) - Skalierbarkeit durch Bauteilwiederholung am Umfang(Clamping) - Scalability through component repetition on the circumference
Lösbarkeit/Trennbarkeit der Materialien (Umweltschutzanforderung,Solubility / separability of materials (environmental protection requirement,
Serviceanforderungen) minimaler Einfluss auf magnetische Randbedingungen (minimale Störfelder)Service requirements) minimal influence on magnetic boundary conditions (minimal interference fields)
Vermeidung von unterschiedlichen Materialpassungen, wie z.B. Aluminium in Stahl oder umgekehrt axiale Einstellbarkeit (Justierbarkeit) der StatorlageAvoidance of different material fits, e.g. Aluminum in steel or vice versa axial adjustability (adjustability) of the stator
Standardisierung von Bauteilen (Bauteilclusterung) möglichStandardization of components (component clustering) possible
Verwendung von Standardverbindungsmaterialien (Schrauben)Use of standard connection materials (screws)
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous embodiments of the subject invention are the description, the drawings and claims removed.
Kurze Beschreibung der ZeichnungShort description of the drawing
Ein Ausführungsbeispiel der erfindungsgemäßen Befestigungsvorrichtung ist in derAn embodiment of the fastening device according to the invention is in the
Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Die in den Figuren gezeigten Merkmale sind rein schematisch und nicht maßstäblich zu verstehen. Es zeigt:Drawing shown and explained in more detail in the following description. The features shown in the figures are purely schematic and not to scale. It shows:
Fig. 1 eine schematische Längsschnittansicht einer elektrischen Maschine mit einer erfindungsgemäßen Statorbefestigung gemäß der Schnittlinie I- 1 in Fig. 2;Figure 1 is a schematic longitudinal sectional view of an electric machine with a stator according to the invention according to the section line I- 1 in Fig. 2.
Fig. 2 eine schematische Draufsicht auf die elektrische Maschine von Fig. 1 ; Fig. 3 die erfindungsgemäße Statorbefestigung in einer vergrößerten Draufsicht gemäß dem Detail III in Fig. 2; und Fig. 4 die erfindungsgemäße Statorbefestigung in einer vergrößertenFig. 2 is a schematic plan view of the electric machine of Fig. 1; 3 shows the stator fastening according to the invention in an enlarged plan view according to the detail III in FIG. 2; and FIG. 4 shows the stator fastening according to the invention in an enlarged view
Längsschnittansicht gemäß dem Detail IV in Fig. 1 .Longitudinal sectional view according to the detail IV in Fig. 1st
Ausführungsformen der ErfindungEmbodiments of the invention
Nachfolgend wird unter Bezugnahme auf die Fign. 1 bis 4 eine elektrische Maschine mit einer Statorbefestigung gemäß der vorliegenden Erfindung beschrieben. Die elektrische Maschine ist ein EC-Motor, welcher in einem Fahrzeug verwendet wird. Fig. 1 ist eine Schnittansicht entlang der Linie l-l in Fig. 2, und die Fign. 3 und 4 sind vergrößerte Ansichten gemäß dem Detail III in Fig. 2 bzw. dem Detail IV in Fig. 1 .Hereinafter, with reference to FIGS. 1 to 4 an electric machine with a stator mounting according to the present invention will be described. The electric machine is an EC motor used in a vehicle. Fig. 1 is a sectional view taken along the line I-I in Fig. 2, and Figs. 3 and 4 are enlarged views according to the detail III in Fig. 2 and the detail IV in Fig. 1st
Die in Fign. 1 und 2 gezeigte elektrische Maschine 1 umfasst ein zylindrisches Maschinengehäuse 2, einen darin befestigten Stator 3, eine Rotorwelle 4 mit einem daran angeordneten Permanentmagneten 5 sowie einen nicht gezeigten elektrischen Steckanschluss. Das Maschinengehäuse 2 ist topfförmig ausgebildet und an seiner offenen Seite mit einem nicht gezeigten Deckelelement verschlossen. Die Rotorwelle 4 ist an ihren beiden Enden in zwei Lagern 6 gelagert, wobei das an der offenen Seite des Maschinengehäuses 2 vorgesehene Lager 6 mittels eines Trägerteils 7 am Maschinengehäuse 2 befestigt ist. Das Drehmoment der Rotorwelle 4 kann über eine Verzahnung 8 an dem der offenen Seite des Maschinengehäuses 2 zugewandten Ende der Rotorwelle 4 abgenommen werden. Der Stator 3 umfasst in bekannter Weise ein hülsenförmiges Statorgehäuse 9, ein darin fixiertes Statorlamellenpaket mit Wicklungen 10 sowie eine Sensohk (nicht gezeigt).The in Fign. 1 and 2 shown electrical machine 1 comprises a cylindrical machine housing 2, a stator 3 fixed therein, a rotor shaft 4 with a permanent magnet 5 disposed thereon and an electrical plug connection, not shown. The machine housing 2 is cup-shaped and closed at its open side with a cover element, not shown. The rotor shaft 4 is mounted at its two ends in two bearings 6, wherein the provided on the open side of the machine housing 2 bearing 6 is fixed by means of a support member 7 on the machine housing 2. The torque of the rotor shaft 4 can be removed via a toothing 8 at the end of the rotor shaft 4 facing the open side of the machine housing 2. The stator 3 comprises, in a known manner, a sleeve-shaped stator housing 9, a stator lamella packet with windings 10 fixed therein and a sensor block (not shown).
Der Stator 3 ist in die kreisrunde Öffnung 11 des Maschinengehäuses 2 axial eingesetzt, bis das Statorgehäuse 9 an einem Ringabsatz 12 des Maschinengehäuses 2 anliegt. Anstelle eines umlaufenden Ringabsatzes 12 kann das Maschinengehäuse 2 auch mehrere nicht umlaufende Anschläge aufweisen. Die Befestigung des Stators 3 im Maschinengehäuse 2 erfolgt durch drei Spannpratzen 13, die am Maschinengehäuse 2 verschraubt sind und das Statorgehäuse 9 am Ringabsatz 12 axial festspannen. Die drei Spannpratzen 13 sind in Umfangsrichtung des Maschinengehäuses 2 jeweils gleichweit voneinander beabstandet angeordnet.The stator 3 is inserted axially into the circular opening 11 of the machine housing 2 until the stator housing 9 bears against an annular shoulder 12 of the machine housing 2. Instead of a circumferential annular shoulder 12, the machine housing 2 may also have a plurality of non-circumferential stops. The attachment of the stator 3 in the machine housing 2 is effected by three clamping claws 13 which are screwed to the machine housing 2 and the stator housing 9 am Clamp the annular shoulder 12 axially. The three clamping claws 13 are each arranged equidistant from each other in the circumferential direction of the machine housing 2.
Fign. 3 und 4 stellen die Befestigung zwischen Maschinengehäuse 2 und Stator 3 mittels einer Spannpratze 13 im Detail dar.FIGS. 3 and 4 illustrate the attachment between the machine housing 2 and stator 3 by means of a clamping claw 13 in detail.
Die Spannpratze 13 ist über zwei Schrauben 14 stirnseitig am Maschinengehäuse 2 festgeschraubt und spannt mit ihrem freien Pratzenende 15, welches radial nach innen gerichtet ist und das Statorgehäuse 9 in Einsetzrichtung des Stators 3 hintergreift, das Statorgehäuse 9 an den Ringabsatz 12 axial fest. Dabei greift das freie Pratzenende 15 passgenau zwischen zwei seitliche Anschläge 16 des Statorgehäuses 9 ein, wodurch das Statorgehäuse 9 innerhalb des Maschinengehäuses 2 drehfest um die Rotorachse 17 (Fig. 1 ) fixiert ist.The clamping claw 13 is screwed by two screws 14 frontally on the machine housing 2 and clamped with its free Pratzenende 15, which is directed radially inward and the stator housing 9 engages behind in the direction of insertion of the stator 3, the stator housing 9 axially fixed to the annular shoulder 12. The free Pratzenende 15 engages accurately between two lateral stops 16 of the stator housing 9, whereby the stator housing 9 within the machine housing 2 rotatably about the rotor axis 17 (Fig. 1) is fixed.
Im gezeigten Ausführungsbeispiel sind die beiden Anschläge 16 durch zwei parallele Seitenwände einer Aussparung 18 gebildet, die in der Stirnseite des Statorgehäuses 9 vorgesehen ist und radial nach außen offen ist. Der Abstand der beiden Seitenwände 16 entspricht der Breite des freien Pratzenendes 15. Mit anderen Worten greift die Spannpratze 13 mit ihrem freien Pratzenende 15 formschlüssig in die Aussparung 18 ein, wodurch das Statorgehäuse 9 im Maschinengehäuse 2 sowohl axial als auch drehfest fixiert ist.In the illustrated embodiment, the two stops 16 are formed by two parallel side walls of a recess 18 which is provided in the end face of the stator housing 9 and is radially outwardly open. The distance between the two side walls 16 corresponds to the width of the free Pratzenendes 15. In other words, the clamping claws 13 engages with its free Pratzenende 15 positively in the recess 18, whereby the stator housing 9 is fixed both axially and rotationally fixed in the machine housing 2.
Das freie Pratzenende 15 weist eine in Richtung auf das Statorgehäuse 9 vorstehende, sich in Umfangsrichtung erstreckende Prägung 19 auf, mit der die Spannpratze 13 am Statorgehäuse 9, d.h. am Boden 20 der Aussparung 18, linienförmig anliegt. Diese linienförmige Anlage ermöglicht es, einen definierten axialen Druck mit der Spannpratze 13 auf das Statorgehäuse 9 auszuüben und axiale Wärmeausdehnungen auszugleichen.The free Pratzenende 15 has a projecting towards the stator housing 9, extending in the circumferential direction embossing 19, with which the clamping claw 13 on the stator housing 9, i. on the bottom 20 of the recess 18, linearly applied. This linear system makes it possible to exert a defined axial pressure with the clamping claw 13 on the stator housing 9 and to compensate for axial thermal expansions.
Wie in Fig. 4 gezeigt, sind die Schrauben 14 in Gewindebohrungen (Langlöcher) 21 des Maschinengehäuses 2 eingeschraubt, wodurch - in begrenztem Maße - die Lage des Stators 3 axial eingestellt bzw. justiert werden kann. Die Gewindebohrungen 21 weisen in ihrem an die Spannpratze 13 angrenzenden Bereich einen Freigang 22, d.h. einen Abschnitt ohne Gewinde, auf, damit sich die Schraube 14 leicht verbiegen kann. Die Schraube 14 wirkt dann wie eine Feder, und Biegespannungen werden signifikant reduziert.As shown in Fig. 4, the screws 14 are screwed into threaded holes (slots) 21 of the machine housing 2, whereby - to a limited extent - the position of the stator 3 can be adjusted axially or adjusted. The threaded holes 21 have in their adjoining the clamping claw 13 area a clearance 22, ie a section without thread on, so that the Screw 14 can easily bend. The screw 14 then acts like a spring, and bending stresses are significantly reduced.
Die Spannpratze 13 weist zwischen ihrer Prägung 19 und den Schrauben 14 zu beiden Seiten jeweils eine Einschnürung 23 auf. Die in Fig. 3 gestrichelt angedeutete Verbindungslinie 24 zwischen den beiden Einschnürungen 23 definiert die Biegelinie des freien Pratzenendes 15, wodurch die Biegebelastung unter den Schraubenköpfen signifikant reduziert ist. Die Verbindungslinie 24 dient außerdem als mögliche Sollbruchstelle bei starker Überbelastung im Fehlerfall. The clamping claw 13 has between its embossment 19 and the screws 14 on both sides in each case a constriction 23. The dashed line indicated in Fig. 3 connecting line 24 between the two constrictions 23 defines the bending line of the free Pratzenendes 15, whereby the bending load is significantly reduced below the screw heads. The connecting line 24 also serves as a possible predetermined breaking point in heavy overload in case of failure.

Claims

R. 319997 B224 Rk/mp 06.08.2007Patentansprüche R. 319997 B224 Rk / mp 06.08.2007Patent claims
1 . Vorrichtung zur Befestigung eines Stators (3) in einer Öffnung (1 1 ) eines Maschinengehäuses (2), dadurch gekennzeichnet, dass der Stator (3) durch mindestens zwei, insbesondere mindestens drei, am Maschinengehäuse (2) befestigte Spannpratzen (13) gegen einen Ringabsatz (1 1 ) des Maschinengehäuses (2) oder gegen mindestens zwei nicht umlaufende Anschläge (1 1 ) axial festgespannt ist.1 . Device for fastening a stator (3) in an opening (1 1) of a machine housing (2), characterized in that the stator (3) by at least two, in particular at least three, on the machine housing (2) fixed clamping claws (13) against a Ring shoulder (1 1) of the machine housing (2) or against at least two non-rotating stops (1 1) is axially clamped.
2. Befestigungsvorrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass die Spannpratzen (13) jeweils mit ihrem radial nach innen vorstehenden Pratzenende (15) den Stator (3) in Einsetzrichtung des Stators (3) hintergreifen.2. Fastening device according to claim 1, characterized in that the clamping claws (13) in each case with its radially inwardly projecting Pratzenende (15) engage behind the stator (3) in the insertion direction of the stator (3).
3. Befestigungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Spannpratzen (13) in Umfangsrichtung des Maschinengehäuses (2) jeweils gleichweit voneinander beabstandet angeordnet sind.3. Fastening device according to claim 1 or 2, characterized in that the clamping claws (13) in the circumferential direction of the machine housing (2) are each arranged equidistant from each other.
4. Befestigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Stator (3) in Umfangsrichtung jeweils zwei seitliche Anschläge (16) aufweist, zwischen die die Spannpratze (13) passgenau eingreift.4. Fastening device according to one of the preceding claims, characterized in that the stator (3) in the circumferential direction in each case two lateral stops (16), between which the clamping claws (13) engages accurately.
5. Befestigungsvorrichtung nach Anspruch 4, dadurch gekennzeichnet, dass die beiden Anschläge (16) durch zwei Seitenwände einer Aussparung (18) gebildet sind, die in der Stirnseite des Stators (3) vorgesehen ist und radial nach außen offen ist. 5. Fastening device according to claim 4, characterized in that the two stops (16) by two side walls of a recess (18) are formed, which is provided in the end face of the stator (3) and is radially outwardly open.
6. Befestigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spannpratze (13) an ihrem freien Pratzenende (15) eine in Richtung auf den Stator (3) vorstehende, insbesondere linienförmige Prägung (19) aufweist, mit der die Spannpratze (13) am Stator (3) anliegt.6. Fastening device according to one of the preceding claims, characterized in that the clamping claw (13) at its free Pratzenende (15) in the direction of the stator (3) projecting, in particular linear embossing (19), with which the clamping claw (13 ) rests against the stator (3).
7. Befestigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spannpratze (13) eine in Umfangsrichtung verlaufende Biegelinie (24) für das freie Pratzenende (15) aufweist.7. Fastening device according to one of the preceding claims, characterized in that the clamping claw (13) has a circumferentially extending bending line (24) for the free Pratzenende (15).
8. Befestigungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Biegelinie (24) des freien Pratzenendes (15) jeweils durch eine Einschnürung (23) an den beiden Seiten der Spannpratze (13) definiert ist.8. Fastening device according to claim 7, characterized in that the bending line (24) of the free Pratzenendes (15) in each case by a constriction (23) on the two sides of the clamping claw (13) is defined.
9. Befestigungsvorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Spannpratzen (13) mittels Schrauben (14), die in9. Fastening device according to one of the preceding claims, characterized in that the clamping claws (13) by means of screws (14), in
Gewindebohrungen (21 ) des Maschinengehäuses (2) eingeschraubt sind, am Maschinengehäuse (2) befestigt sind.Threaded holes (21) of the machine housing (2) are screwed to the machine housing (2) are fixed.
10. Befestigungsvorrichtung nach Anspruch 9, dadurch gekennzeichnet, dass die Gewindebohrungen (21 ) in ihrem an die Spannpratzen (13) angrenzenden10. Fastening device according to claim 9, characterized in that the threaded bores (21) in their adjacent to the clamping claws (13)
Bereich jeweils einen Freigang (22) aufweisen. Area each have a clearance (22).
PCT/EP2008/060412 2007-08-16 2008-08-07 Electrical machine having an apparatus for securing a stator WO2009021904A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007038522A DE102007038522A1 (en) 2007-08-16 2007-08-16 Stator fastening by means of clamping claws
DE102007038522.8 2007-08-16

Publications (1)

Publication Number Publication Date
WO2009021904A1 true WO2009021904A1 (en) 2009-02-19

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WO (1) WO2009021904A1 (en)

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