WO2009144055A1 - Procédé de fabrication d’un boîtier de stator d’un moteur électrique - Google Patents

Procédé de fabrication d’un boîtier de stator d’un moteur électrique Download PDF

Info

Publication number
WO2009144055A1
WO2009144055A1 PCT/EP2009/053714 EP2009053714W WO2009144055A1 WO 2009144055 A1 WO2009144055 A1 WO 2009144055A1 EP 2009053714 W EP2009053714 W EP 2009053714W WO 2009144055 A1 WO2009144055 A1 WO 2009144055A1
Authority
WO
WIPO (PCT)
Prior art keywords
pole tube
plastic
return
magnet
stator housing
Prior art date
Application number
PCT/EP2009/053714
Other languages
German (de)
English (en)
Inventor
Gerd Kirsten
Marco Antonio Vieira Batista
Helio Ribeiro
Abdelkader Sadi
Alfredo Dimas Catini
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
Priority to BRPI0912096A priority Critical patent/BRPI0912096A2/pt
Publication of WO2009144055A1 publication Critical patent/WO2009144055A1/fr

Links

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
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/14—Casings; Enclosures; Supports
    • 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
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines

Definitions

  • the invention relates to a method for producing a stator housing of an electric motor, in particular for an auxiliary unit in a motor vehicle.
  • a method for producing a gear drive unit which comprises a pole pot for an electric motor and a transmission housing.
  • the pole pot is used to hold an armature with an armature shaft of the electric motor and is connected by means of locking elements with the transmission housing.
  • the pole pot has an iron-containing pole tube, which serves as a return element for exciter magnets, which are arranged in the interior of the pole tube.
  • a plastic core is provided in the pole tube, which forms the pole pot together with the pole tube.
  • the plastic core For mounting the pre-assembled anchor is inserted into the plastic core, then the plastic core is connected via the locking elements with the Poltopf final gear housing and finally the pole tube is pushed over the prefixed magnets on the plastic core.
  • Return ring can be inserted, wherein in the interior of the return ring locking elements for attachment of magnets are arranged. During manufacture, the magnets must first be inserted into the return ring, then the composite of return ring and magnet is inserted axially into the open plastic housing.
  • the invention has for its object to simplify the production of a stator housing of an electric motor.
  • the components accommodated in the stator housing should at the same time be firmly anchored to the housing wall.
  • the inventive method is suitable for producing a stator housing of an electric motor, in particular a small-sized, permanent-magnet electric motor, for auxiliary equipment in motor vehicles such as
  • Power window motor is used. Another field of application is, for example, the production of the stator housing for a starter motor in a motor vehicle.
  • the stator housing comprises a plastic pole tube, at least one magnet and at least one metallic return part for the exciter magnet.
  • the plastic pole tube is produced by injection molding, wherein the magnet and the return part are already embedded in the material of the plastic pole tube during the injection molding process.
  • stator housing is considerably simplified, since various manufacturing and assembly steps are summarized.
  • plastic pole tube are made and the return part and the excitation magnet in the wall of the plastic pole tube integrated.
  • the combination of the various manufacturing and assembly steps leads to a significant time savings, on the other hand, an immediate integration of the return part and magnet in the plastic pole tube without the need for additional attachment measures is achieved.
  • Another advantage is that the accuracy with respect to the roundness of the pole tube is already ensured by the injection molding process, so that an additional aftertreatment is no longer necessary. Furthermore, the requirements for the components to be integrated into the plastic pole tube are reduced, since tolerances are compensated by die casting. This makes it possible, for example, to dispense with the magnets on an additional grinding. A surface treatment of the components to be introduced can be omitted. Another advantage is the fact that the return part in its dimensions must be chosen only as large as it is actually necessary for the conduction of the magnet and the magnetic flux.
  • a bearing bush in the pole tube, which serves for the storage of the armature or rotor shaft of the electric motor.
  • the bushing is expediently axially upstream of both the return part and the magnet within the pole tube.
  • Return part and magnet are preferably arranged axially overlapping, the return part engages around the magnet radially. In order for the return part to be able to conduct the magnetic field of the magnet in the best possible way, the return part and the magnet lie in direct radial contact with one another.
  • a magnetically conductive metal part is used as a return part.
  • At least two magnets are provided, which are preferably designed as permanent magnets, wherein each magnet and a return part - A -
  • magnets and return parts are assigned. These are preferably formed part-circular.
  • more than two magnets and a corresponding number of return parts come into consideration, for example four or six magnets and four or six return parts.
  • the pole tube is divided into two separate pole tube halves, which are each manufactured by injection molding and connected to each other after manufacture. This can be one
  • plastic for the pole tube polyamide, polyethylene or other injection-moldable plastic is used as plastic for the pole tube polyamide, polyethylene or other injection-moldable plastic. It may be appropriate to add to the plastic a glass fiber content to increase the strength, for example, with a share of 30% to 60%, in particular 40% or 50%.
  • Fig. 1 the components of a stator housing consisting of a stator housing
  • Plastic pole tube two permanent magnets and two metallic shell-shaped trailing parts, including an assembly aid used in manufacture,
  • FIG. 3 a pole tube half in a perspective view
  • 4 shows an electric motor including connected transmission housing
  • FIG. 5 shows a stator housing in a further embodiment, in which the return parts are offset relative to the respective associated magnets in the circumferential direction
  • FIG. 6 is a view of the inside of the stator housing of FIG. 5,
  • FIG. 7 is a sectional view of the stator housing of FIG. 5,
  • FIG. 8 shows a stator housing in yet a further embodiment, according to which additional flux-conducting elements arranged between the magnets are provided,
  • FIG. 9 is a sectional view of the stator housing according to FIG. 8.
  • a stator housing 1 of an electric motor for example, a window regulator motor is shown in the assembled state, in the right half of the figure, individual parts, which are integrated into the stator housing, shown during the manufacturing process.
  • the stator housing 1 comprises a pole tube 2, which is made of plastic, for example, consists of polyamide or polyethylene and preferably contains a glass fiber content.
  • the stator housing 1 magnets 3 and 4 return parts are assigned, which are firmly integrated into the pole tube 2.
  • There are two cup-shaped, permanently excited magnets 3 are provided, as well as two cup-shaped, made of metal and the magnetic field conducting return parts 4, each one Magnets 3 are assigned.
  • the return parts 4 surround the magnets 3 in the radial direction; in the axial direction, the return parts 4 cover the magnets 3.
  • the stator housing 1 is manufactured by injection molding.
  • the magnets 3 and expediently also the return parts 4 are introduced by means of an assembly aid 5 in the injection mold for the pole tube 2, followed by the injection of the liquid plastic for the pole tube.
  • the magnets 3 and the return parts 4 are embedded in the plastic material of the pole tube, so that additional fastening measures between magnets and return parts as well as between magnet and pole tube or return element and pole tube can be dispensed with.
  • a bearing bush 6 is embedded in the material of the pole tube 2 during the injection molding process. The bearing bush 6 is axially outside of the magnet 3 and the return part. 4
  • Return elements 4 each extend over an angular range of less than 180 °, so that in the assembled state, the two return parts 4 do not extend completely over the circumference and between the return parts is a plastic strip.
  • the return parts 4 expediently form part of the outer wall of the pole tube.
  • a housing half of the stator housing 1 is shown.
  • the pole tube 2 is divided into two, can be seen a Polrohrhgan with an embedded magnet 3 and an embedded cup-shaped and external return part 4.
  • a Polrohrhgan with an embedded magnet 3 and an embedded cup-shaped and external return part 4.
  • the pole tube is produced in one piece.
  • an electric motor is shown, which has a stator housing 1, which is formed in the manner described above and a pole tube 2 and outer, cup-shaped trailing parts 4 has.
  • a transmission 7 is flanged in a transmission housing, which is connected to the stator housing.
  • FIGS. 5 to 7 show a further exemplary embodiment of a stator housing 1, which is part of an electric starter motor for a motor vehicle.
  • the method of production is analogous to the first embodiment by injection molding of the pole tube 2 and embedding both the radially inner magnets 3 and the radially outer recirculating 4.
  • the return parts 4 are diamond-shaped and have at their respective axial end sides of a triangular-shaped tapered geometry. Overall, distributed over the circumference six magnets and accordingly six return parts 4 are provided, the return parts 4, as shown in particular Fig. 7 are formed in the circumferential direction wider than the intermediate region between two adjacent magnets, so that the return parts in the circumferential direction extend into the area of a magnet.
  • stator housing 1 which is also suitable for an electric starter motor of a motor vehicle.
  • the plastic pole tube 2 is produced by injection molding and both the magnets 3 and the return parts 4 in the material of Plastic pole tube 2 embedded.
  • flux guide elements 8 are provided, each directly are arranged adjacent to a magnet 3 on the radial inside of the pole tube 2 and extend in the axial direction. The flux guide elements 8 are likewise embedded in the wall material of the plastic pole tube 2 during injection molding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L’invention concerne un procédé de fabrication d’un boîtier de stator avec un tube polaire en plastique, un aimant et un élément de reflux. Le tube polaire en plastique est fabriqué par un procédé de moulage par injection, l’aimant et l’élément de reflux étant incorporés dans la matière du tube polaire.
PCT/EP2009/053714 2008-05-30 2009-03-30 Procédé de fabrication d’un boîtier de stator d’un moteur électrique WO2009144055A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BRPI0912096A BRPI0912096A2 (pt) 2008-05-30 2009-03-30 processo para produção de um alojamento de estator de um motor elétrico

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810002129 DE102008002129A1 (de) 2008-05-30 2008-05-30 Verfahren zur Herstellung eines Statorgehäuses eines Elektromotors
DE102008002129.6 2008-05-30

Publications (1)

Publication Number Publication Date
WO2009144055A1 true WO2009144055A1 (fr) 2009-12-03

Family

ID=40943751

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/053714 WO2009144055A1 (fr) 2008-05-30 2009-03-30 Procédé de fabrication d’un boîtier de stator d’un moteur électrique

Country Status (3)

Country Link
BR (1) BRPI0912096A2 (fr)
DE (1) DE102008002129A1 (fr)
WO (1) WO2009144055A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021132323A1 (de) 2021-12-08 2023-06-15 Audi Aktiengesellschaft Elektromaschine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009037655A1 (de) * 2009-08-14 2011-02-17 Wilo Se Herstellung des Motorenstators einer Spaltrohrpumpe
DE102010019145A1 (de) * 2010-05-03 2011-11-03 Siegfried Richter Elektrischer Schwingantrieb für eine Fluidpumpe
DE102010043832A1 (de) * 2010-11-12 2012-05-16 Robert Bosch Gmbh Topfförmiges Polgehäuse eines Elektromotors
DE102012223323A1 (de) * 2012-12-17 2014-06-18 Robert Bosch Gmbh Verfahren zur Herstellung eines Stators einer elektrischen Maschine, Stator und elektrische Maschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389519A (en) * 1972-05-09 1975-04-03 Bosch Gmbh Robert Electrical machines
CH577372A5 (en) * 1975-04-22 1976-07-15 Buss Ag Continuously producing fibre-reinforced plastic moulding materials - using transporting screw for scattering staple fibres on molten plastic
DE3737603A1 (de) * 1986-11-05 1988-05-19 Hitachi Ltd Gleichstrommotor
WO2001037399A2 (fr) * 1999-11-16 2001-05-25 Robert Bosch Gmbh Unite d'entrainement electrique
JP2006045390A (ja) * 2004-08-05 2006-02-16 Nitto Boseki Co Ltd 扁平ガラス繊維含有ペレット、扁平ガラス繊維含有熱可塑性樹脂成型物及びこれらの製造方法
WO2006039381A2 (fr) * 2004-10-01 2006-04-13 Siemens Vdo Automotive Corporation Boitier de moteur moule en plastique

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10334875A1 (de) 2003-07-29 2005-02-24 Behr Gmbh & Co. Kg Werkstoff für Formteile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1389519A (en) * 1972-05-09 1975-04-03 Bosch Gmbh Robert Electrical machines
CH577372A5 (en) * 1975-04-22 1976-07-15 Buss Ag Continuously producing fibre-reinforced plastic moulding materials - using transporting screw for scattering staple fibres on molten plastic
DE3737603A1 (de) * 1986-11-05 1988-05-19 Hitachi Ltd Gleichstrommotor
WO2001037399A2 (fr) * 1999-11-16 2001-05-25 Robert Bosch Gmbh Unite d'entrainement electrique
JP2006045390A (ja) * 2004-08-05 2006-02-16 Nitto Boseki Co Ltd 扁平ガラス繊維含有ペレット、扁平ガラス繊維含有熱可塑性樹脂成型物及びこれらの製造方法
WO2006039381A2 (fr) * 2004-10-01 2006-04-13 Siemens Vdo Automotive Corporation Boitier de moteur moule en plastique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021132323A1 (de) 2021-12-08 2023-06-15 Audi Aktiengesellschaft Elektromaschine

Also Published As

Publication number Publication date
DE102008002129A1 (de) 2009-12-03
BRPI0912096A2 (pt) 2015-10-06

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