EP2076945B1 - Kommutator für eine elektrische maschine - Google Patents

Kommutator für eine elektrische maschine Download PDF

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Publication number
EP2076945B1
EP2076945B1 EP07788111.8A EP07788111A EP2076945B1 EP 2076945 B1 EP2076945 B1 EP 2076945B1 EP 07788111 A EP07788111 A EP 07788111A EP 2076945 B1 EP2076945 B1 EP 2076945B1
Authority
EP
European Patent Office
Prior art keywords
commutator
solder
contact
segment
soldering
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.)
Not-in-force
Application number
EP07788111.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2076945A1 (de
Inventor
Andrew Pierson
Dirk Altmeyer
Helmut Huber
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 EP2076945A1 publication Critical patent/EP2076945A1/de
Application granted granted Critical
Publication of EP2076945B1 publication Critical patent/EP2076945B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators
    • H01R39/045—Commutators the commutators being made of carbon
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H01R4/028—Soldered or welded connections comprising means for preventing flowing or wicking of solder or flux in parts not desired
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly

Definitions

  • the invention relates to a commutator according to the preamble of claim 1.
  • the known commutator has a plurality of spaced, metallic Segmenttrag kind each having a verkrallten in a hub body mounting portion which is fixedly and electrically connected to a carbon contact segment, wherein the contact segments in total form a brush surface.
  • An axial section adjoins the attachment section of each segment support part in the axial direction, on which end a winding connection hook is provided, with which a winding wire can be electrically connected.
  • a winding wire is wound in each winding terminal hook.
  • connection process it depends on a necessary connection process of winding wire and winding connection hook on a consistently good mechanical and electrical connection quality of winding connection hook and winding wire.
  • a connection process one uses the so-called "hot staking". In this case, the winding connection hook is deformed so that the winding wire is clamped. Thereafter, an electrical voltage is applied to heat the winding terminal hook and the winding wire. In this process, an insulating layer separates from the winding wire and it finds a welding of winding wire and winding connection hook instead.
  • the invention is therefore based on the object to propose a commutator in which, preferably without reducing the amount of solder, laterally projecting at the mounting portions Lotüber von Streps.
  • a recess in particular an elongated depression to introduce serves as a solder barrier and, at least partially, prevents the solder from flowing over the peripheral edge of the fastening section or the contact segment.
  • a solder barrier recess may be used in the manufacture of the segment support part be stamped or punched in a simple manner in the attachment portion.
  • the depth and width of the solder barrier well should be sized so that sufficient liquid solder can be accommodated to prevent overflow of the solder barrier well.
  • the solder barrier depression preferably completely delimits a soldering surface to be provided during the bonding process with solder.
  • the commutator is designed as a planar commutator with a planar brush surface, wherein the attachment portion is formed by a radial portion of the segment support member, it is advantageous to arrange the Lotbarriere-recess at least in a radially outer region of the mounting portion to prevent liquid solder from leaking at the To prevent circumferential side of the commutator.
  • the solder barrier recess is arranged with a small edge distance on the contact segment underside and / or on the mounting portion upper side ,
  • the solder barrier depression is preferably designed as a circumferentially closed, trench-like depression.
  • a heat barrier region is provided with a reduced cross-sectional area.
  • the effective cross-sectional area in the thermal barrier region is reduced by introducing at least one, preferably at least partially sectionally arcuately contoured, circumferentially closed or edge-open recess in the segment support part.
  • the thermal barrier region is preferably formed between two open recesses which are spaced apart in the circumferential direction, open at the edge, in particular curved inward, so that only this small cross-sectional surface area is available for heat transport in the direction of the fastening section.
  • the extent of the heat barrier region in the circumferential direction at least approximately corresponds to the extent of the winding connection hook in the circumferential direction.
  • each segment support part has a winding connection hook and a fixing section for fixing a contact segment.
  • Each two adjacent segment support members are connected to each other via a circumferentially oriented, preferably curved web. Otherwise, there is only one air gap between the adjacent segment support members. In sum, all webs form an annular connection. It can be provided that this annular connection is spaced as far as possible from the winding connection hooks, preferably in the region of the free end of the fastening sections remote from the winding connection hooks.
  • a contact disk is first soldered to the mounting portions. Then, the partial encapsulation of the component consisting of metallic stamped and bent part and contact disc, which preferably consists of carbon or a carbon-graphite mixture, with an insulating material, preferably a pressed material, in particular a thermoset with solidification elements, such as glass fibers or glass fiber beads.
  • an insulating material preferably a pressed material, in particular a thermoset with solidification elements, such as glass fibers or glass fiber beads.
  • the mutually facing metallic sides of the segment support members are also encapsulated.
  • the contact disk In order to realize an electrical insulation of the segment support parts from each other, the contact disk must be divided into individual contact segments in a further step. Furthermore, all connecting webs between the segment supporting parts must be removed.
  • annular stamped and bent part is described, in particular made of copper or a copper alloy for its production, in which the connecting webs between the individual segment support parts are located as far as possible away from the winding connection hooks.
  • a designed as a plan commutator commutator 1 for an otherwise known electric machine (not shown) is shown.
  • the invention can also be implemented in a commutator with a brush running surface arranged on the lateral surface.
  • the commutator 1 is formed symmetrically to a longitudinal axis L and is rotatably mounted in the mounted state on a not shown, a central receiving opening of the commutator passing through the armature shaft.
  • the commutator 1 has a formed as a plastic injection molded part hub body 3, which carries a plurality of distributed over the circumference, spaced from each other Segmenttragmaschine 4 made of copper.
  • Each segment support member 4 has a commutator 1 formed as a planar commutator formed as a radial section, in Fig. 2 illustrated, plate-shaped mounting portion 5 and an angled 90 ° thereto axial portion 6, the latter at its end remote from the attachment portion 5 a Winding connection hook 7 carries.
  • the winding connection hooks 7 are bent in the direction of a front-side, planar brush tread 8.
  • the brush tread 8 is formed by a plurality of contact segments 9 made of carbon or a carbon-graphite mixture.
  • Each contact segment 9, which tapers inwardly in the radial direction, is assigned a fastening section 5 of a segment support part 4, wherein each contact segment 9 is soldered firmly and in an electrically conductive manner to the associated fastening section 5.
  • the contact segments 9 are metallized on the fastening sections 5 facing side in a known manner.
  • two adjacent contact segments 9 are electrically insulated from each other via an air gap 10 extending in the radial direction.
  • a punched bent part 11 (base) is shown, which is needed for the production of the commutator.
  • the stamped and bent part 11 has a plurality of circumferentially adjacent segment support members 4, wherein each two adjacent segment support members 4 are connected to each other via a connecting web 12.
  • the contact segments 9 forming contact disc (not shown) soldered, whereupon the unit of stamped and bent part 11 contact disc is partially encapsulated by hub body material, among others, the facing sides 13, 14 of the mounting portions 5 are encapsulated.
  • the connecting webs 12 In order to electrically isolate the individual segment support parts 4 from one another, the connecting webs 12 must be separated from each other in a further step, in particular by a sawing process.
  • the connecting webs 12 are arranged at the inner radius of the stamped and bent part 12. Only obliquely downwardly facing anchoring claws, which may also be dispensed with, project beyond the connecting webs 12 in the radial direction obliquely inside.
  • each mounting portion 5 a Lotbarriere-depression 16 is punched, which is intended to avoid a flow of solder beyond the edge 17 of the mounting portions 5 addition.
  • the solder barrier depression 16 is a circumferentially closed, essentially triangular-shaped, trench-like depression having a depth t and a width b. The distance of the solder barrier depression 16 from the edge 17 corresponds approximately to the single to double width b of the solder barrier depression 16.
  • a heat barrier region 18 is provided, which deteriorates the heat conduction from the winding connection hooks 7, in particular during a hot-staking process for fastening a winding wire in the direction of the fastening section 5.
  • the cross-sectional area of the heat barrier region 18 is reduced in a region near the winding terminal hook 7 as compared with the cross-sectional area of the axial portion 6.
  • the cross-sectional area reduction is realized by means of two opposing edge-open recesses 19, 20, which are arc-shaped at their inner, mutually facing end are contoured.
  • the extent x of the heat barrier region 18 in the circumferential direction approximately corresponds to the extent x of the associated winding connection hook 7 in the circumferential direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
EP07788111.8A 2006-09-29 2007-08-01 Kommutator für eine elektrische maschine Not-in-force EP2076945B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006046669A DE102006046669A1 (de) 2006-09-29 2006-09-29 Kommutator für eine elektrische Maschine
PCT/EP2007/057940 WO2008040586A1 (de) 2006-09-29 2007-08-01 Kommutator für eine elektrische maschine

Publications (2)

Publication Number Publication Date
EP2076945A1 EP2076945A1 (de) 2009-07-08
EP2076945B1 true EP2076945B1 (de) 2017-03-22

Family

ID=38434423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788111.8A Not-in-force EP2076945B1 (de) 2006-09-29 2007-08-01 Kommutator für eine elektrische maschine

Country Status (6)

Country Link
US (1) US8269394B2 (es)
EP (1) EP2076945B1 (es)
CA (1) CA2664436C (es)
DE (1) DE102006046669A1 (es)
MX (1) MX2009003341A (es)
WO (1) WO2008040586A1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104979731A (zh) * 2014-04-02 2015-10-14 德昌电机(深圳)有限公司 电机换向器、含碳制品及其制造方法
DE102015202349A1 (de) 2014-12-16 2016-06-16 Volkswagen Aktiengesellschaft Verschaltungsanordnung einer elektrischen Maschine mit asymmetrischem Querschnitt in einem Verbindungsabschnitt
CN107453177B (zh) * 2016-05-30 2023-04-28 深圳市凯中精密技术股份有限公司 一种铜壳，具有其的换向器及换向器制作方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028420A1 (de) * 1990-09-07 1992-03-12 Kautt & Bux Kg Plankommutator und verfahren zu seiner herstellung
JP3313509B2 (ja) * 1994-04-25 2002-08-12 株式会社ミツバ コミテータ
KR100332318B1 (ko) * 1998-02-02 2002-04-12 오카메 히로무 정류자 및 그 제조 방법
DE19926900A1 (de) * 1999-06-12 2000-12-21 Kirkwood Ind Gmbh Verfahren zur Herstellung eines Plankommutators und nach diesem Verfahren hergestellter Kommutator
DE19956844A1 (de) * 1999-11-26 2001-06-13 Kolektor D O O Plankommutator, Verfahren zu seiner Herstellung sowie Leiterrohling und Kohlenstoffscheibe zur Verwendung bei seiner Herstellung
US6525445B2 (en) * 2000-04-13 2003-02-25 Denso Corporation Plane commutator and method of manufacturing the same
US6784589B1 (en) * 2000-05-25 2004-08-31 Sugiyama Seisakusyo Co. Ltd. Plane carbon commutator
MXPA05006707A (es) * 2000-05-31 2005-09-08 Kolektor Group Doo Conmutador plano.
DE10042512A1 (de) * 2000-08-30 2002-03-28 Bosch Gmbh Robert Hakenkommutator
GB0104915D0 (en) * 2001-02-28 2001-04-18 Johnson Electric Sa A planar carbon segment comutator
DE102004003146B4 (de) * 2003-01-22 2023-08-24 Aisan Kogyo Kabushiki Kaisha Motor, Kraftstoffpumpe, Kommutator und Verfahren zur Herstellung eines Kommutators
US7419084B2 (en) * 2004-11-24 2008-09-02 Xerox Corporation Mounting method for surface-mount components on a printed circuit board

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US8269394B2 (en) 2012-09-18
EP2076945A1 (de) 2009-07-08
CA2664436C (en) 2012-04-17
MX2009003341A (es) 2009-04-14
US20100019615A1 (en) 2010-01-28
WO2008040586A1 (de) 2008-04-10
CA2664436A1 (en) 2008-04-10
DE102006046669A1 (de) 2008-04-03

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