EP3973617A1 - Moteur électrique comportant une fixation de plusieurs tôles de rotor sur un arbre de rotor permettant une compensation de tolérance axiale - Google Patents

Moteur électrique comportant une fixation de plusieurs tôles de rotor sur un arbre de rotor permettant une compensation de tolérance axiale

Info

Publication number
EP3973617A1
EP3973617A1 EP20726684.2A EP20726684A EP3973617A1 EP 3973617 A1 EP3973617 A1 EP 3973617A1 EP 20726684 A EP20726684 A EP 20726684A EP 3973617 A1 EP3973617 A1 EP 3973617A1
Authority
EP
European Patent Office
Prior art keywords
rotor shaft
electrical machine
rotor
end plate
laminated core
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.)
Pending
Application number
EP20726684.2A
Other languages
German (de)
English (en)
Inventor
Alexandre Fischer
Thomas Fritz
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Publication of EP3973617A1 publication Critical patent/EP3973617A1/fr
Pending 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
    • 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
    • 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
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • 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
    • H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
    • 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
    • H02K7/003—Couplings; Details of shafts
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the invention relates to an electrical machine for driving a motor vehicle, such as a purely electrically or hybridized motor vehicle, for example a car, truck, bus or other utility vehicle, with a rotor, the rotor being a central rotor shaft and one made up of several rotor laminations tes has laminated core attached to the rotor shaft.
  • a motor vehicle such as a purely electrically or hybridized motor vehicle, for example a car, truck, bus or other utility vehicle
  • a rotor being a central rotor shaft and one made up of several rotor laminations tes has laminated core attached to the rotor shaft.
  • Generic rotors of electrical machines are well known in different implementations. For example, designs are known in which a press fit is provided directly between the individual rotor laminations of the laminated core and the rotor shaft. Fastenings of the laminated core by means of a nut in connection with a groove are also known. Alternatively, welded connections are also implemented.
  • the object of the present invention to eliminate the disadvantages known from the prior art and, in particular, to provide an electrical machine whose rotor is produced simply and with sufficient strength to transmit the highest possible torques.
  • This is achieved according to the invention in that the laminated core is contacted on at least one axial side by an end plate effecting tolerance compensation, which end plate is in turn supported by a locking ring pressed onto the rotor shaft.
  • This attachment of the laminated core via the end plate and the securing ring results in an attachment between the laminated core and the rotor shaft that is easy to manufacture. Because the locking ring can easily be individually adapted to the corresponding press connection without the shape of the rotor laminations of the Blechpa ketes having to be changed. As a result, a particularly robust rotor is implemented, the manufacturing effort is reduced.
  • the locking ring has an axially protruding cup area, which cup area is pressed onto a radial outer side of the rotor shaft. This cup area can easily be adjusted in its axial position during assembly.
  • the locking ring has a disk area which is arranged radially outside the cup area and which disk area lies flat directly on the end plate, the further structure of the locking ring is kept simple.
  • the disk area is connected to the cup area via an axially extending connecting area.
  • the circlip can be cleverly mounted on the rotor shaft, axially offset from the laminated core.
  • the locking ring is pressed onto the rotor shaft in such a way that it effects / applies an axial pretensioning force to the end plate.
  • the diameter on which the locking ring is pressed can be easily set.
  • the locking ring sits on a (second) outer diameter of the rotor shaft, which (second) outer diameter is smaller than a (first) outer diameter on which the laminated core and / or the at least one end plate sit / sits.
  • first end plate rests on a first axial side of the lamination stack and a second end plate rests on a second axial side of the lamination stack opposite the first axial side. Tolerance compensation can thus be easily implemented through the thickness of the end plates.
  • the locking ring rests against the first end plate and the second end plate rests (directly) on a radial shoulder of the rotor shaft.
  • the laminated core is supported on one axial side directly on the rotor shaft, which further favors a simple structure.
  • the electrical machine is designed as a synchronous motor.
  • the rotationally fixed connection of the laminated core can also be easily established.
  • cost-efficient axial fastening and tolerance compensation of the rotor laminations on the rotor shaft are implemented.
  • the rotor of the electrical synchronous machine (electrical machine) is shaped by using individual rotor laminations which together form a rotor stack (laminated stack).
  • Tolerance compensation can be set using an end plate, which tolerance compensation in turn depends on the installation space and fluctuating tolerances depends.
  • a locking ring / circlip is pressed onto the rotor shaft for axially fastening / supporting the laminated core.
  • Fig. 1 is a longitudinal sectional view of an electrical Ma machine according to the invention according to a preferred embodiment
  • Fig. 2 shows a detailed view of the electrical Ma cut in the longitudinal direction
  • Fig. 3 is a perspective view of the rotor used in Fig. 1 from egg ner the locking ring having side, and
  • Fig. 4 is a perspective view of the in Figs. 1 to 3 used safety rings.
  • FIG. 1 an electrical machine 1 according to the invention is clearly visible in its basic construction.
  • the electrical machine 1 is implemented as a synchronous machine / a synchronous motor.
  • the electrical machine 1 has a rotor 2 which is arranged centrally so as to be rotatable about an axis of rotation 17.
  • a stator 18 of the electrical machine 1 is attached radially outside of the Ro tor 2.
  • the stator 18 is firmly received in a housing 19.
  • the rotor 2 is rotatably mounted in this housing 19.
  • the electrical machine 1 is usually dimensioned as a drive machine of a motor vehicle.
  • the Electrical machine 1 is therefore preferably used in a drive train of a motor vehicle, which is not shown here for the sake of clarity.
  • the electrical cal machine 1 is integrated in the present exemplary embodiment in FIG. 1 in an electrical axle drive unit (e-axle).
  • the motor vehicle is preferably implemented as a purely electrically driven vehicle.
  • the electric machine 1 is also used in a flybridge module according to further statements, which hybrid module is used in a known manner between an internal combustion engine and a transmission of the drive train and is thus prepared for implementing a hybridized drive of the motor vehicle.
  • the electrical machine 1 is also used as a wheel hub machine / a wheel hub motor.
  • FIGS. 2 and 3 show the further structure of the rotor 2 designed according to the invention, which can also be used separately from the electrical machine 1 shown as an independent unit in other electrical machines.
  • the rotor 2 has a central rotor shaft 3.
  • the rotor shaft 3 is arranged concentrically to the axis of rotation 17.
  • the rotor shaft 3 is provided with an essentially cylindrically extending receiving area 20.
  • the laminated core 5 typically has a plurality of rotor laminations 4 which rest on one another in the axial direction.
  • the rotor laminations 4 are typically implemented as identical parts.
  • the rotor laminations 4 are already preassembled to form the laminated core 5.
  • the laminated core 5 is held non-rotatably on the receiving area 20 via a form-fit connection 16, here in the form of a form-fit toothing.
  • the laminated core 5 is supported on a first axial side 6a (viewed along the axis of rotation 17) by a first end plate 7a, which in turn is directly from a securing ring 8 pressed onto the rotor shaft 3 is supported.
  • This axial securing of the laminated core 5 by means of the securing ring 8 is shown in detail in FIG.
  • the first end sheet 7a lies flat against the sheet core 5 directly from the first axial side 6a of the laminated core 5.
  • the first end plate 7a is also on the receiving area 20 supported and rotatably received.
  • the receiving area 20 has a constant first outer diameter over its entire length.
  • the securing ring 8 is fastened directly to the rotor shaft 3 by means of a cup area 9 arranged radially on the inside, namely pressed on.
  • the axially protruding cup area 9 is pressed onto a receiving surface 13 which is formed by a radial step 14.
  • the radial step 14 is offset inward in the radial direction with respect to the receiving region 20.
  • the receiving surface 13 consequently has a second outer diameter which is smaller than the first outer diameter.
  • the length / axial extension of the receiving surface 13 is greater than the length of the cup area 9 and is adapted to the further shape of the retaining ring 8 so that the position of the retaining ring 8 can be varied during assembly along the receiving surface 13.
  • the locking ring 8 rests flat against the first end plate 7a.
  • a connecting area 12 connecting the disk area 11 to the cup area 9 extends such that the disk area 11 is arranged offset in the axial direction with respect to the cup area 9. Due to the design of the disk area 11, the locking ring 8 is also referred to as a backup disk.
  • the securing ring 8 can also be seen particularly well in FIG. 4 in its sole representation. It becomes clear here that the connecting area 12 is essentially implemented as an axial bulge.
  • the locking ring 8, like the first end plate 7a, is made from a metal sheet (steel).
  • a second end plate 7b is arranged on a second axial side 6b of the laminated core 5 facing away from the first axial side 6a.
  • the second end plate 7b also lies flat against the laminated core 5 on the second axial side 6b.
  • the second end plate 7b is supported directly on a shoulder 15 of the rotor shaft 3 projecting radially outward (FIG. 1).
  • the shoulder 15 is made in one piece with the rotor shaft 3. This results in an axial reception of the laminated core 5 together with the end plates 7a, 7b between the shoulder 15 and the retaining ring 8.
  • the retaining ring 8 is preferably pressed onto the rotor shaft 3 with a certain axial preload force, so that the first end plate 7a presses on the laminated core 5 with an axial pretensioning force and the laminated core 5 in turn presses the second end plate 7b with an axial pretensioning force against the shoulder 15 presses.
  • the embodiment according to the invention provides a cost-efficient and compact solution for the attachment of the rotor laminations 4 to the rotor shaft 3 in terms of installation space.
  • This solution offers a simple and inexpensive attachment option.
  • this solution offers a high degree of flexibility and can be installed in many different electric machines 1, which differ either in terms of the active length (power) and / or the transmission interface.
  • the inventive solution therefore also consists of an inexpensive, simple and modular-compatible technical solution.
  • the tolerance compensation is done by the end plate (first end plate 7a), which is dependent on the installation space and can be adapted for the tolerance compensation.
  • the axial fastening takes place with the axial retaining ring 8, which is pressed onto the rotor shaft 3.
  • the rotor laminations 4 and the end plates 7a, 7b are thus held in position.
  • a preferred installation variant takes place in an e-axle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un moteur électrique (1) conçu pour une transmission d'un véhicule automobile, comprenant un rotor (2), ce rotor (2) comportant un arbre de rotor (3) central ainsi qu'un noyau feuilleté (5) constitué de plusieurs tôles de rotor (4) et fixé sur l'arbre de rotor (3), ce noyau feuilleté (5) étant en contact, vers au moins une face axiale (6a), avec une tôle d'extrémité (7a) assurant une compensation de tolérance, ladite tôle d'extrémité (7a) étant supportée par une bague de sécurité (8) disposée sur l'arbre de rotor (3) par pression.
EP20726684.2A 2019-05-22 2020-04-30 Moteur électrique comportant une fixation de plusieurs tôles de rotor sur un arbre de rotor permettant une compensation de tolérance axiale Pending EP3973617A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019113596.6A DE102019113596A1 (de) 2019-05-22 2019-05-22 Elektrische Maschine mit einer einen axialen Toleranzausgleich ermöglichenden Befestigung mehrerer Rotorbleche auf einer Rotorwelle
PCT/DE2020/100363 WO2020233739A1 (fr) 2019-05-22 2020-04-30 Moteur électrique comportant une fixation de plusieurs tôles de rotor sur un arbre de rotor permettant une compensation de tolérance axiale

Publications (1)

Publication Number Publication Date
EP3973617A1 true EP3973617A1 (fr) 2022-03-30

Family

ID=70775227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20726684.2A Pending EP3973617A1 (fr) 2019-05-22 2020-04-30 Moteur électrique comportant une fixation de plusieurs tôles de rotor sur un arbre de rotor permettant une compensation de tolérance axiale

Country Status (5)

Country Link
US (1) US20220216754A1 (fr)
EP (1) EP3973617A1 (fr)
CN (1) CN113544943A (fr)
DE (1) DE102019113596A1 (fr)
WO (1) WO2020233739A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108893A1 (de) 2021-04-09 2022-10-13 Schaeffler Technologies AG & Co. KG Verfahren zum festen mechanischen Verbinden von zwei Bauteilen, Rotor einer elektrischen Rotationsmaschine, ein Verfahren zur Herstellung eines Rotors einer elektrischen Rotationsmaschine und elektrische Rotationsmaschine
DE102021206596A1 (de) 2021-06-25 2022-12-29 Volkswagen Aktiengesellschaft Rotor für eine elektrische Maschine
CN116760213B (zh) * 2023-08-17 2023-10-20 长沙电机厂集团长瑞有限公司 一种超薄叠片绕制的永磁电机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5565642B2 (ja) * 2010-03-24 2014-08-06 アイシン・エィ・ダブリュ株式会社 回転電機用ロータ
JP2013158076A (ja) * 2012-01-26 2013-08-15 Honda Motor Co Ltd 回転電機のロータ及びその製造方法
DE102012215236A1 (de) * 2012-08-28 2014-03-06 Siemens Aktiengesellschaft Rotor einer elektrischen Maschine und elektrische Maschine
DE102014206847A1 (de) * 2014-04-09 2015-10-15 Zf Friedrichshafen Ag Stator einer rotierenden elektrischen Maschine
JP2016093015A (ja) * 2014-11-06 2016-05-23 トヨタ自動車株式会社 電動機用ロータ
JP6365470B2 (ja) * 2015-09-03 2018-08-01 トヨタ自動車株式会社 回転電機用ロータ
KR101633014B1 (ko) * 2016-01-14 2016-06-23 노순창 코깅 토르크를 최소화하는 영구자석 회전장치와 이를 이용한 영구자석발전기 및 영구자석전동기
DE102016202264A1 (de) * 2016-02-15 2017-08-17 Volkswagen Aktiengesellschaft Rotor für eine Elektromaschine, Elektromaschine sowie Verfahren zur Herstellung eines derartigen Rotors
JP6740940B2 (ja) * 2017-03-16 2020-08-19 トヨタ自動車株式会社 回転電機のロータ

Also Published As

Publication number Publication date
WO2020233739A1 (fr) 2020-11-26
US20220216754A1 (en) 2022-07-07
DE102019113596A1 (de) 2020-11-26
CN113544943A (zh) 2021-10-22

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