EP3028371A2 - Rotor pour un moteur électrique et procédé de fabrication du rotor - Google Patents

Rotor pour un moteur électrique et procédé de fabrication du rotor

Info

Publication number
EP3028371A2
EP3028371A2 EP14744307.1A EP14744307A EP3028371A2 EP 3028371 A2 EP3028371 A2 EP 3028371A2 EP 14744307 A EP14744307 A EP 14744307A EP 3028371 A2 EP3028371 A2 EP 3028371A2
Authority
EP
European Patent Office
Prior art keywords
rotor
rotor shaft
epoxy resin
starting element
axial
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.)
Withdrawn
Application number
EP14744307.1A
Other languages
German (de)
English (en)
Inventor
Juergen Herp
Martin Kiefer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
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 EP3028371A2 publication Critical patent/EP3028371A2/fr
Withdrawn legal-status Critical Current

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
    • H02K1/22—Rotating parts of the magnetic circuit
    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/081—Structural association with bearings specially adapted for worm gear drives
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
    • H02K2205/03—Machines characterised by thrust bearings

Definitions

  • the invention relates to a rotor for an electric motor according to the preamble of claim 1. Furthermore, the invention relates to a method for producing a rotor according to the invention.
  • a runner according to the preamble of claim 1 is already known from practice as part of a transmission drive unit, as used in a comfort drive of a motor vehicle.
  • a comfort drive is understood to mean, for example but not limited to, a window lift drive, a sunroof drive, a windscreen wiper motor, a seat adjustment motor or the like.
  • the known rotor is usually mounted on both sides of its rotor body in each case a bearing, wherein the one bearing is arranged in the motor housing or Poltopfgepuruse the electric motor. Due to axial forces acting on the rotor shaft, it is necessary to axially support the rotor shaft toward the mentioned bearing.
  • EP 0 895 668 B1 moreover discloses a rotor for an electric motor, in which a commutator, which is usually arranged on the side of the rotor body opposite the starting sleeve, is fastened rotationally fixed by means of an adhesive process using an epoxy resin compound on the rotor shaft. Disclosure of the invention
  • the invention has the object, a rotor for an electric motor according to the preamble of claim 1 such that a manufacturing technology relatively simple and safe and reliable arrangement between the
  • Thrust element start sleeve
  • the rotor shaft is made possible. This object is achieved in a rotor for an electric motor with the
  • Characteristics of claim 1 characterized in that on the rotor shaft between the rotor body and the starting element an epoxy resin composition is arranged, and that the epoxy resin in the axial end position of the starting element on the rotor shaft forms a radially encircling bead as an axial stop for the starting element, on which an end face the starting element at least partially applied.
  • this is the required from the prior art pressing the starting element on the rotor shaft to the axial
  • Positioning of the rotor shaft to the starting element is basically no longer necessary. As a result, the dimensional tolerance between the
  • Inner diameter of the starting sleeve and the outer diameter of the rotor shaft is relatively uncritical, so that the parts manufacturing technology easier or cheaper to produce.
  • any types of fits, and thus also interference fits, between the starting element and the rotor shaft are conceivable. It is only essential that the epoxy resin mass forms an axial stop for the starting element.
  • Rotor shaft is designed a clearance, and that in the axial
  • Outer diameter of the rotor shaft at least partially fills. This means that an adhesive bond is formed between said elements, which is characterized in that the used Epoxy resin mass the radial gap between the inner bore of the
  • Restart element and the outer diameter of the rotor shaft at least partially fills and thus allows a relatively large-scale and secure adhesive connection between the elements.
  • this is the
  • Epoxy resin composition compensates for component tolerances.
  • the bead extends over the entire axial distance between the starting element and the end face of the rotor body facing it, so that the bead is in contact with the end face of the rotor body.
  • the starting element consists of plastic.
  • Such starting elements can be produced particularly cost-effectively as injection-molded parts and allow good adhesion of the epoxy resin.
  • the starting element at least on the side facing the rotor body in the region of the inner bore has at least one receiving pocket for the epoxy resin.
  • this is designed in the form of a part-annular groove-shaped recess.
  • Recesses can be easily produced in any form and number, especially in existing plastic start-up elements, since this only a one-time appropriate design of the tool is required.
  • a plurality of receiving pockets arranged at uniform angular intervals relative to one another are provided.
  • a further preferred embodiment of the starting element provides that the starting element has at least one receiving pocket on each end face.
  • Orientation can be mounted with each end face in the direction of the rotor body, which facilitates handling, since no specific orientation of the starting element is required to the rotor shaft.
  • Rotor shaft is free of the epoxy resin to ensure troublefree installation of the
  • the invention therefore provides that the epoxy resin compound on the end face of the rotor body facing the starting element as well as a partial region of the axial length of the rotor shaft on the side facing the contact element
  • the epoxy resin composition on the rotor shaft in the axial end position of the starting element extends a maximum up to the rotor body facing away from the end face of the starting element, but preferably less.
  • the invention also includes a method for producing a
  • Rotor according to the invention in which an axial abutment element is mounted on a rotor body having a rotor body, which is pushed over a shaft end of the rotor shaft and moved to an axial end position.
  • the method comprises applying an epoxy resin compound to at least a portion of the rotor shaft in a process step, then moving the starting element into its axial end position with the epoxy resin composition not yet cured
  • Epoxidharzmasse by displacement by the contact element forms a radially encircling bead on which abuts the end face of the starting element, and that last the epoxy resin in the axial end position of the
  • Hardening element hardens, so that a firm connection between the
  • Rotor shaft and the starting element is produced.
  • a part of the epoxy resin mass passes into a radial gap between the starting element and the rotor shaft and this at least partially fills.
  • Another, particularly preferred method provides that the
  • Epoxy resin composition is applied to the contact element facing the end face of the rotor body and to a partial length of the rotor shaft, wherein the partial length extends from the end face of the rotor body to half of the axial length of the starting element in its axial end position.
  • Epoxy resin composition provides that the epoxy resin composition for application to the rotor is formed as a powdery mass, which is preferably applied by an electrostatic powder coating process on the rotor, and that is exposed to cure the epoxy resin composition of the rotor of a heat, radiation or inductive magnetic field treatment.
  • the curing time of the epoxy resin composition can be shortened and the strength increased.
  • Powder coating processes are also other non-electrostatic coating processes such as dip coating or the like. conceivable.
  • Fig. 1 is a simplified illustration of a transmission drive unit under
  • Fig. 2 is a flow chart to illustrate the essential
  • FIG. 6 each axial portions of the rotor of FIG. 1 during
  • Window lift drive a seat adjustment drive, a sunroof drive or the like understood.
  • the transmission drive unit 100 comprises an electric motor 1, which in the
  • a transmission housing 3 in which a transmission 5 is arranged, which is formed in one or more stages, and which serves to reduce the rotational speed of the electric motor 1 while increasing its torque.
  • a transmission 5 is arranged, which is formed in one or more stages, and which serves to reduce the rotational speed of the electric motor 1 while increasing its torque.
  • From the gear housing 3 protrudes an output shaft 6, at least indirectly with the element to be adjusted, so for example the
  • the electric motor 1 comprises a rotor 10 according to the invention, whose rotor shaft 1 1 extends axially into the transmission housing 3 inside.
  • the rotor shaft 1 1 has within the transmission housing 3 a
  • Spur toothing of a gear of the transmission 5 meshes.
  • a rotor body 12 On the rotor shaft 1 1 is concentric with the longitudinal axis 14 of the rotor shaft 1 1, a rotor body 12 rotatably secured within the pole pot housing 2 in a conventional manner.
  • the winding wires arranged in corresponding grooves of the rotor body 12 (not shown) are electrically connectable to a commutator 13.
  • the rotor shaft 1 1 is mounted in the embodiment in three bearings 15 to 17.
  • the one bearing 15 is arranged on the side facing away from the rotor body 12 of the commutator 13, while the bearing 16 in the region of
  • Shaft end 18 is located on the side facing away from the transmission housing 3 at a relatively short distance from the rotor body 12. Axial forces acting on the rotor 10 in the direction of the arrow 19 are supported by the rotor shaft 1 1 towards the bearing 16 via an axial starting element 20 fastened on the rotor shaft 1 1 in the form of a so-called starting sleeve.
  • the starting element 20 shown in detail in FIG. 3 is preferably made of plastic and is manufactured as an injection-molded part.
  • the thrust element 20 is sleeve-shaped and has an inner bore 21 with an inner diameter D, which is dimensioned such that between the inner diameter D of the thrust element 20 and the outer diameter d of
  • Rotor shaft 1 1 (Fig. 6), at least in the region of the axial end position of the stop element 20 on the rotor shaft 1 1, a clearance fit is formed.
  • the starting element 20 moreover has four recesses 24 in the form of receiving pockets 25 offset by 90 ° from each other in the region of its two end faces 22, 23.
  • the receiving pockets 25 are formed as rectangular or teilringnutförmige recesses 24.
  • In the area of the receiving pockets 25 of the radial gap between the inner bore 21 and the outer diameter d of the rotor shaft 1 1 is formed enlarged.
  • the starting element 20 is fixed on the rotor shaft 1 1 by means of an epoxy resin compound 30. 2, it is provided in a first process step 31, that on the rotor shaft 1 1 of the rotor body 12 is attached. Subsequently, in a second process step 32, the epoxy resin compound 30 corresponding to
  • the epoxy resin composition 30 is also applied to a portion t of the length of the rotor shaft 1 1, wherein the length of the portion t extends into an axial position of the rotor shaft 1 1, approximately in the middle of the starting element 20 in its axial end position the rotor shaft 1 1 corresponds.
  • a sleeve-shaped cover 34 is pushed, which covers the shaft end 18.
  • Epoxy resin composition 30 is initially present in the form of a powder, which is applied by an electrostatic powder coating process on the end face 33 of the rotor body 12 and on the rotor shaft 1 1 in the partial region t and adheres there.
  • the epoxy resin compound 30 is displaced in the direction of the rotor body 12, such that in the axial end position of the starting element 20 shown in FIG. 6 between the rotor body 12 and the starting element 20, a radially encircling bead 40 is formed, which completely covers one end face 41 of the abutment element 20 and closes the axial interspace between the epoxy resin compound 30 on the end face 33 to the abutment element 20.
  • the bead 40 thus forms an axial stop for the starting element 30.
  • a fourth process step 43 the curing of the epoxy resin 30 by a heat ,, radiation or preferably inductive magnetic field treatment at least of the corresponding Area of the rotor shaft 1 1, such that the epoxy resin 30 hardens and fixes the starting element 20 on the rotor shaft 1 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un rotor (10) pour un moteur électrique (1), lequel possède un arbre de rotor (11) muni d'un corps de rotor (12) fixé sur l'arbre de rotor (11), et comprenant aussi un élément d'appui axial (20) qui se rattache à un côté frontal du corps de rotor (12) à un écart axial par rapport à l'axe longitudinal (14) de l'arbre de rotor (11) et qui est configuré pour effectuer le positionnement axial de l'arbre de rotor (11) dans un carter (2, 3). L'élément d'appui (20) est fixé à demeure à l'arbre de rotor (11). L'invention est caractérisée en ce qu'une masse de résine époxy (30) se trouve sur l'arbre de rotor (11) entre le corps de rotor (12) et l'élément d'appui (20), et en ce que la masse de résine époxy (30) forme sur l'arbre de rotor (11), dans la position d'extrémité axiale de l'élément d'appui (20), un talon (40) périphérique radial faisant office de butée axiale pour l'élément d'appui (20), sur lequel repose une surface frontale (41) de l'élément d'appui (20).
EP14744307.1A 2013-07-31 2014-07-24 Rotor pour un moteur électrique et procédé de fabrication du rotor Withdrawn EP3028371A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215048.2A DE102013215048A1 (de) 2013-07-31 2013-07-31 Läufer für einen Elektromotor und Verfahren zum Herstellen des Läufers
PCT/EP2014/065882 WO2015014700A2 (fr) 2013-07-31 2014-07-24 Rotor pour un moteur électrique et procédé de fabrication du rotor

Publications (1)

Publication Number Publication Date
EP3028371A2 true EP3028371A2 (fr) 2016-06-08

Family

ID=51228429

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14744307.1A Withdrawn EP3028371A2 (fr) 2013-07-31 2014-07-24 Rotor pour un moteur électrique et procédé de fabrication du rotor

Country Status (5)

Country Link
EP (1) EP3028371A2 (fr)
KR (1) KR20160037924A (fr)
CN (1) CN105659473A (fr)
DE (1) DE102013215048A1 (fr)
WO (1) WO2015014700A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017204560A1 (de) * 2017-03-20 2018-09-20 Robert Bosch Gmbh Verfahren zur Herstellung der Verbindung zwischen einem Kunststoff-Magnetträger und einer Welle
EP3763943B1 (fr) 2019-07-10 2024-09-04 Grundfos Holding A/S Procédé de fabrication d'une chemise d'entrefer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001445A1 (de) * 2008-04-29 2009-11-05 Robert Bosch Gmbh Elektrische Antriebseinheit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1438960A (en) * 1972-11-23 1976-06-09 Lucas Electrical Ltd Method of manufacturing a rotor assembly for a dynamo electric machine optical transmission systems
DE3804219C2 (de) * 1988-02-11 1997-12-18 Bosch Gmbh Robert Stellantrieb
DE19706851A1 (de) 1997-02-21 1998-09-03 Bosch Gmbh Robert Läufer und Verfahren zur Herstellung eines Läufers
US6781267B2 (en) * 2001-06-14 2004-08-24 Black & Decker Inc. Motor for a power tool
JP4487173B2 (ja) * 2003-09-19 2010-06-23 株式会社安川電機 マイクロサーボモータ用回転子およびこの回転子を備えたマイクロサーポモータ
KR101134968B1 (ko) * 2009-11-19 2012-04-09 현대자동차주식회사 전기식 워터 펌프
CN201994757U (zh) * 2011-04-26 2011-09-28 上海润驰电气有限公司 用于太阳能水泵系统的直流电机
KR20130059917A (ko) * 2011-11-29 2013-06-07 삼성전기주식회사 스위치드 릴럭턴스 모터
CN203014621U (zh) * 2012-11-21 2013-06-19 中国船舶重工集团公司第七0七研究所 双定子通孔轴承永磁陀螺电机

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008001445A1 (de) * 2008-04-29 2009-11-05 Robert Bosch Gmbh Elektrische Antriebseinheit

Also Published As

Publication number Publication date
WO2015014700A3 (fr) 2015-10-15
WO2015014700A2 (fr) 2015-02-05
KR20160037924A (ko) 2016-04-06
DE102013215048A1 (de) 2015-02-05
CN105659473A (zh) 2016-06-08

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