WO2015091481A2 - Machine électrique comportant un étrier de serrage et procédé de fabrication de ladite machine électrique - Google Patents

Machine électrique comportant un étrier de serrage et procédé de fabrication de ladite machine électrique Download PDF

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Publication number
WO2015091481A2
WO2015091481A2 PCT/EP2014/077961 EP2014077961W WO2015091481A2 WO 2015091481 A2 WO2015091481 A2 WO 2015091481A2 EP 2014077961 W EP2014077961 W EP 2014077961W WO 2015091481 A2 WO2015091481 A2 WO 2015091481A2
Authority
WO
WIPO (PCT)
Prior art keywords
legs
permanent magnets
pole housing
bracket
electrical machine
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.)
Ceased
Application number
PCT/EP2014/077961
Other languages
German (de)
English (en)
Other versions
WO2015091481A3 (fr
Inventor
Tarek Mili
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
Priority to CN201480069260.2A priority Critical patent/CN106030983B/zh
Publication of WO2015091481A2 publication Critical patent/WO2015091481A2/fr
Publication of WO2015091481A3 publication Critical patent/WO2015091481A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent 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
    • H02K1/12—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
    • 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
    • H02K1/26—Rotor cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • Electric machine including a clamp, and method for manufacturing the electric machine
  • the invention relates to an electric machine comprising a clamping bracket, and a method for producing the electrical machine according to the preamble of the independent claims.
  • Magnetic retaining springs known, which press the permanent magnets against the housing wall by means of a spring force to secure them.
  • 102007004873 AI shows, for example, such a magnetic retaining spring in which waves are formed on the two longitudinal limbs to stabilize them.
  • the bracket between the two longitudinal legs is flat and arranged in the same plane as the two legs. If you want to use such a magnetic retaining spring for the follower pole motor described above, there is a risk that the magnetic retaining spring in the follower pole contour tilts radially inwards against the rotor and touches it. This can lead to the destruction of the electric motor.
  • the electric machine according to the invention as well as the inventive method for producing such a machine with the features of the independent claims have the advantage that is arranged by the arrangement of the clamp to a single permanent magnet in the flattened area between the permanent magnets no bracket, the two legs connects with each other.
  • Permanent magnets are fixed in the pole housing.
  • the two legs of the clamp are clamped by the spring action of the bracket between the opposite inner walls. Due to the wedge effect of the wedge-shaped groove between the inner wall and the side wall of the permanent magnet, the leg is also at the same time
  • Permanent magnets without the spring clip the permanent magnet directly pressed against the inner wall. As a result, the permanent magnet is fixed both radially and in particular also axially in the housing.
  • the space can be flattened along the
  • Inner wall remain free of magnetic retaining springs.
  • the air gap between the inner contour of the flattened regions and the rotor can also be minimized without the risk of a collision with the rotor.
  • the length of the pole housing can be reduced accordingly, whereby space and weight of the electric motor is saved.
  • bracket runs between the two legs along the end face of the permanent magnet.
  • bracket protrudes arcuately radially outward out of the plane, which span the two legs. Since the winding head of the rotor builds axially longer than the axial length of the permanent magnet, the overall length of the motor through the brackets, between the end faces of the permanent magnet and the
  • the bracket may be formed in the same plane with the legs as a 2-dimensional clamp, which is easier to manufacture.
  • the bracket overlaps radially on an axial end surface with the rotor, which is why corresponding axial space between the Rotorend components (winding head) and the Polgepatusegeber must be provided.
  • the free ends are axially at different locations on the two side surfaces, whereby an axial tilting of the permanent magnets is effectively prevented.
  • an extension is bent at an angle at an axial end of a leg, so that this radially with the axial end face of the permanent magnet overlaps.
  • This extension has a stop surface on which the permanent magnet bears axially with its end face in order to prevent an axial displacement of the permanent magnet.
  • the follower poles are particularly favorable by molding each two in
  • Circumferential direction is thereby formed a curved inner contour, which interacts magnetically with the rotor. These beads form with respect to the circumferential direction, the edges of the follower pole and simultaneously form the
  • the follower poles and the permanent magnets have approximately the same inner diameter, wherein the legs are arranged between the beads and the side surfaces of the permanent magnets.
  • wedge-shaped gaps are formed between the beads of the follower pole contour and the side surfaces of the permanent magnets, into which the free legs engage over the entire axial length.
  • the leg is in this case for defined positioning on the one hand on the obliquely to the pressing direction arranged inner wall of the bead, whereby the leg due to the
  • Form clamping element for the permanent magnet which prevents the permanent magnet slips radially inward.
  • the pole housing is advantageously designed as a pole pot having on one side a - preferably integrally formed with the pole pot - bottom, which in particular has a bearing receptacle for a rotor bearing.
  • opposite open Poltopfseite has a flange which abuts after assembly to a corresponding counter flange of another housing part.
  • a flange On the flange, for example, holes as receptacles for fasteners - preferably screws or rivets - to a
  • the clamp can be inserted axially into the pole housing with or after the insertion of the individual permanent magnets, the legs being advantageously pressed by the spreading direction of the clamp directly to the inner surfaces of the follower poles, in particular to the oblique flanks of the beads. In this case, the legs bear against the side surfaces, wherein the bracket connecting the legs extends along the end face of the permanent magnet. It is particularly advantageous if the bracket is completely radially in the region of the end faces, and thus does not radially overlap with the rotor.
  • Brush holder component in the pole housing allows a clearly specified flange interface, which is particularly favorable for a modular
  • Modular system for combining different pole housing and gear housing is suitable.
  • the clamps can optionally also be used in combination with the bonding of the permanent magnets to these during the
  • the clamp is particularly inexpensive from a metal wire than
  • Wire bending part made in which a one-piece wire is bent with a round or square cross-section in a 2-dimensional or 3-dimensional structure.
  • the spring clip is made so that the two legs form an angle to each other before installation, which is for example 5 ° to 35 °.
  • the spring clip is then deformed so that the two legs are approximately parallel. Since the legs are approximately straight, the deformation takes place during assembly in the region of the bracket, or in the transition regions from the bracket to the legs.
  • the permanent magnets may have a - in particular continuous - Polabhebung or two different discrete inner radii, whereby the side surface a greater distance from the rotor having.
  • the side surface is formed radially or obliquely to the radial direction and preferably has a chamfer on the outer circumference.
  • ferrite material may be used for the permanent magnets or, alternatively, rare earth magnetic materials.
  • Figure 1 an embodiment of an electrical according to the invention
  • Figure 2 a cross section of a Polgepatuses according to the prior art
  • Figure 3 a cross section of a pole housing according to the invention
  • Figure 4 an embodiment of a clamping clip according to the invention
  • Figure 5 an inventive clamp in the installed state
  • Figure 6 another embodiment of a clamping clip according to the invention
  • Figure 7 schematically another variant of a clamp according to the invention.
  • the electric motor 11 is for example part of a transmission drive unit, as used for adjusting a sunroof, a disc or a seat part in the motor vehicle.
  • the electric motor 11 is for example part of a transmission drive unit, as used for adjusting a sunroof, a disc or a seat part in the motor vehicle.
  • ferlO has a stator 12, in which two permanent magnets 18 are arranged in a pole housing 16 opposite one another. Between the two opposing permanent magnets 18, two opposite follower poles 22 are arranged, which are formed by the housing wall 26 of the pole housing 16. For this purpose, two beads 28 are each formed in flattened regions 20 of the pole housing 16, which extend in the axial direction 30 - preferably up to a housing bottom 82 of the housing 16. In the circumferential direction 32 is formed between the two beads 28 of the follower pole 22 as a curved pole housing wall 26 which together with the beads 28 forms the flattened region 20 of the pole housing 16.
  • the permanent magnets 18 are arranged in circular segment-shaped holding regions 34 of the pole housing 16, the diameter 35 at the holding regions 34 being greater than the distance 21 between the flattened regions 20
  • Pol housing 16 has an axially open side 36 on which a flange 38 for
  • connection is formed with a further housing part.
  • the flange 38 has receptacles 42 for connecting elements, which are formed for example as bores 43. By means of these bores 43, screws can preferably be screwed into a corresponding mating flange as connecting elements.
  • a rotor 14 is inserted in Figure 1, wherein a small radial air gap 46 between the rotor 14 and the permanent magnet 18 and follower poles 22 is formed.
  • the rotor 14 has a rotor shaft 60, on which an armature pack 62 for receiving electrical windings 64 is arranged.
  • the armature pack 64 rotor teeth 66, which are formed from radial tooth shafts 68 which are completed by radially outer tooth heads 70.
  • Windings 64 are wound radially within the tooth heads 70 on the tooth shafts 68.
  • FIG. 2 shows a known flattened pole housing 16, in which two magnetic holding springs 48 are arranged between two permanent magnets 18.
  • the magnetic retaining springs 48 are formed as U-shaped springs which press with their two free legs (90 ', 91'), the permanent magnets 18 against the inner wall 17 of the pole housing 16.
  • the spreading force (arrows 50) of the magnet holding spring 48 acts in a direction parallel to the flattened regions 20 and thus along a connecting line (37) of the two permanent magnets 18.
  • Magnet holding spring 48 is pressed radially inwardly, which would collide with the rotor 14, not shown here.
  • FIG. 3 An inventive pole housing 16 with an inner contour 72 at the flattened regions 20 is shown in Fig. 3 in a section.
  • the permanent magnets 18 rest against the inner wall 17 of the pole housing 16 in their holding regions 34.
  • the two permanent magnets 18 are magnetized in the same direction in the radial direction 31, so that both form a south pole, for example, on their radial inner side.
  • Via the pole housing 16, which forms a magnetic return a magnetic flux is generated to the follower poles 22, which then form, for example on the inner wall 17 of the pole housing 16 each have a north pole. Since in the area of the follower poles 22 no Permanent magnets 18 are arranged, the maximum dimension 21 of the
  • Permanent magnets 18 have in the circumferential direction 32 side surfaces 74 which extend, for example, approximately in the radial direction 31.
  • beads 28 are formed on the flattened areas, which form a flank 29 on the inner wall 17, which is formed obliquely to the flattened region 20, or to the connecting line 37.
  • the flank 29 of the bead 28 forms with the side surface 74 a wedge-shaped groove 76 between the permanent magnet 18 and the inner wall 17.
  • a free leg 90, 91 of a clamping bracket 77 is inserted, which fixes the permanent magnet 18.
  • the clamping bracket 77 has a first leg 90 and a second leg 91, which are connected to each other at their non-free ends by means of a bracket 92.
  • the bracket 92 exerts on the legs 90, 91 a spreading force 51, which is the
  • Permanent magnet 18 is assigned a single clamping bracket 77, the spreading effect 51 is aligned transversely to the connecting line 37.
  • the legs 90, 91 are pressed by pressing against the sloping edge 29 due to the wedging action of the groove 76 radially outward and thereby deeper into the groove 76, whereby the legs 90, 91 abut the side surface 74.
  • the legs 90, 91 form a wedge in the wedge-shaped groove 76, whereby the permanent magnets 18 are held radially outward on the inner wall 17 of the holding portions 34.
  • the bracket 92 is arched and extends along an end face 75 of the permanent magnet 18th
  • the clamping bracket 77 is disposed completely along the side surfaces 74 and the end face 75, whereby along the flattened regions 20 between the permanent magnets 8 - in contrast to the conventional design of the
  • FIG. 4 shows an inventive clamping bracket 11 without an electric machine 10.
  • the two legs 90, 91 are straight and have free ends 95. At the opposite ends of the legs 90, 91 are interconnected by means of the bracket 92.
  • the two legs 90, 91 form a plane 88, wherein the bracket 92 projects out of this plane 88.
  • the bracket 92 here has a curved course, which corresponds approximately to the curvature of the permanent magnet 18.
  • the two legs 90, 91 are arranged at an angle to each other within the plane 88, which is for example about 5 ° to 40 °.
  • the clamping bracket When installed in the pole housing 16 - as shown in Fig. 3 - is the clamping bracket
  • Figure 5 shows an axial section through the pole housing 16.
  • the bracket 92 is disposed radially outside of the rotor 14 and extends between the end face 75 of the permanent magnet 18 and a housing bottom 82 of the pole housing 16. Since the axial extent of the rotor 14 due to the end surface thereof 15 trained winding head is longer than the permanent magnet 18, the axial length of the pole housing 16 is reduced by the thickness 93 of the bracket 92 over the prior art according to Figure 2 the axial length.
  • the overall length of the pole housing 16 - including the bearing receptacle 83 formed thereon for the rotor shaft 60 - is thus determined directly from the distance 13 of the winding head to the inside of the housing bottom 82.
  • Fig. 6 an alternative embodiment of the clamp strap 77 is shown, in which the
  • Bracket 92 is located together with the legs 90, 91 in a common plane 88.
  • Such a clamp 77 is manufacturing technology cheaper to produce, but requires more space in the axial direction 30, since the bracket 92 now between the
  • the flange 38 has here on a flange half three Shooting 42 on to a flexible Anschraubsent for different
  • a phase 94 or bevel is formed at the outer corner between the side surface 74 and the outer peripheral surface to match the permanent magnet 18 to the inner contour 72 of the flattened portion 20. This will avoid that
  • Permanent magnet 18 tangentially abuts against the inner wall 17, so that the wedge effect of the radial groove 76 is not affected.
  • Fig. 7 shows schematically a single permanent magnet 18 with associated clamping bracket 77 in a further embodiment.
  • the first leg 90 extends approximately to the axial center of the permanent magnet 18, whereas the second leg 91 extends over the entire axial length.
  • the longer leg 91 has an angled extension 96.
  • the projection 96 overlaps with the end face 75 of the permanent magnet 18 and forms an axial stop 97 for the permanent magnet 18 so that it remains fixed axially reliable.
  • the legs 90, 91 and the bracket 92 surround the permanent magnet 18, which is fixed with only one clamp strap 77 of the permanent magnet 18.
  • the legs 90, 91 are drawn schematically according to the installed state, wherein the sake of clarity, the pole housing 16 has been omitted.
  • the legs 90, 91 are here over the entire length of the side surfaces 74 and at the same time on the opposite edges 29, not shown, of the beads 28.
  • the pole housing 16 In the manufacturing process of the electric machine O, the pole housing 16 as
  • the permanent magnets 18 are inserted into the pole housing 16, which can be optionally glued to the inner wall 17.
  • the bracket 92 encloses with the two legs 90, 91, the side surfaces 74 and end face 75.
  • Permanent magnet 18 fixed in position axially and radially. After fixing the
  • Gear housing mounted axially on the rotor shaft 60 on the Bürstenisme- component until the flange 38 rests against the counter flange of the gear housing. Then fasteners - preferably screws - inserted into the receptacles 42 of the flange 38 and connected to the transmission housing.
  • the rotor shaft 60 has a worm and is by means of a sliding bearing - in particular a spherical bearing - stored in Bürstenhalter- component.
  • the transmission is designed, for example, as a worm gear, in which the worm, which is arranged on the rotor shaft 60 of the electric motor 11, meshes with a worm gear mounted in the gear housing.
  • the pole housing 16 of the electric motor 11 is made of metal and serves as a magnetic conclusion.
  • the legs 90, 91 have a different angle to the axial axis.
  • the follower pole contour can also be formed in other ways, wherein the
  • the electric machine 10 is preferably used for actuators in

Landscapes

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

Abstract

L'invention concerne une machine électrique (10), permettant en particulier le déplacement motorisé de pièces mobiles dans un véhicule automobile, ainsi qu'un procédé de fabrication de ladite machine électrique (10), laquelle comprend un stator (12) dans lequel un rotor (14) peut être inséré, ledit stator (12) comportant au moins deux aimants permanents (18) opposés, qui sont disposés dans une carcasse polaire (16), chaque aimant permanent (18) étant immobilisé dans la carcasse polaire (16) par un seul étrier de serrage (77), chaque étrier de serrage (77) présentant une première branche (90) et une seconde branche (91) qui sont reliées l'une à l'autre au moyen d'un étrier (92), et l'étrier de serrage (77) entourant chaque aimant permanent (18) dans le sens circonférentiel (32) de la carcasse polaire (16).
PCT/EP2014/077961 2013-12-20 2014-12-16 Machine électrique comportant un étrier de serrage et procédé de fabrication de ladite machine électrique Ceased WO2015091481A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201480069260.2A CN106030983B (zh) 2013-12-20 2014-12-16 包含夹弓的电机，以及用于制造电机的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013226942.0A DE102013226942A1 (de) 2013-12-20 2013-12-20 Elektrische Maschine beinhaltend einen Klemmbügel, sowie Verfahren zum Herstellen der elektrischen Maschine
DE102013226942.0 2013-12-20

Publications (2)

Publication Number Publication Date
WO2015091481A2 true WO2015091481A2 (fr) 2015-06-25
WO2015091481A3 WO2015091481A3 (fr) 2016-03-24

Family

ID=52102680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/077961 Ceased WO2015091481A2 (fr) 2013-12-20 2014-12-16 Machine électrique comportant un étrier de serrage et procédé de fabrication de ladite machine électrique

Country Status (3)

Country Link
CN (1) CN106030983B (fr)
DE (1) DE102013226942A1 (fr)
WO (1) WO2015091481A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017207768A1 (de) * 2017-05-09 2018-11-15 Robert Bosch Gmbh Elektromotor und Komfortantrieb mit einem Elektromotor

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2735778A1 (de) * 1977-08-09 1979-03-01 Bosch Gmbh Robert Stator fuer elektrische maschinen
US4296343A (en) 1979-10-05 1981-10-20 Ambac Industries, Incorporated Electric motor housing, or the like, with integral pole and methods for making same
DE3048337A1 (de) * 1980-12-20 1982-07-29 Robert Bosch Gmbh, 7000 Stuttgart Elektrische maschine, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen
JPS592554A (ja) * 1982-06-28 1984-01-09 Hitachi Ltd 永久磁石界磁電動機
FR2562734B1 (fr) * 1984-04-05 1988-05-06 Ducellier & Cie Stator pour petits moteurs electriques
JPH10174318A (ja) * 1996-12-05 1998-06-26 Asmo Co Ltd 小型モータ
JP4171914B2 (ja) * 2003-11-27 2008-10-29 株式会社デンソー 電動機、これに用いられる弾性部材、および電動機の製造装置
DE102007004873A1 (de) 2007-01-31 2008-08-07 Robert Bosch Gmbh Statormagnetanordnung
US7986065B2 (en) * 2008-06-04 2011-07-26 Robert Bosch Gmbh Sealed rolled pole housing for an electric motor
CN201286033Y (zh) * 2008-07-18 2009-08-05 德昌电机(深圳)有限公司 电机
DE102011109228A1 (de) * 2011-08-01 2013-02-28 J.N. Eberle Federnfabrik Gmbh Elektrische Maschine sowie Verfahren zur Montage einer elektrischen Maschine

Also Published As

Publication number Publication date
WO2015091481A3 (fr) 2016-03-24
DE102013226942A1 (de) 2015-06-25
CN106030983A (zh) 2016-10-12
CN106030983B (zh) 2019-05-10

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