EP2235801A1 - Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique - Google Patents

Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique

Info

Publication number
EP2235801A1
EP2235801A1 EP08864586A EP08864586A EP2235801A1 EP 2235801 A1 EP2235801 A1 EP 2235801A1 EP 08864586 A EP08864586 A EP 08864586A EP 08864586 A EP08864586 A EP 08864586A EP 2235801 A1 EP2235801 A1 EP 2235801A1
Authority
EP
European Patent Office
Prior art keywords
section
spring section
spring
retaining element
element according
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Withdrawn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
EP08864586A
Other languages
German (de)
English (en)
Inventor
Armin Stubner
Martin Heyder
Norbert Martin
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 EP2235801A1 publication Critical patent/EP2235801A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
    • H02K5/145—Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes
    • 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
    • H01R39/38—Brush holders
    • H01R39/381—Brush holders characterised by the application of pressure to brush
    • 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
    • H01R39/38—Brush holders
    • H01R39/39—Brush holders wherein the brush is fixedly mounted in the holder

Definitions

  • the invention relates to a holding element for a commutator sliding contact of an electric motor according to the preamble of claim 1 and to an electric motor according to claim 12.
  • hammer brushes in which a KommutatorschleifCount (carbon brush) is held on a spiral spring and is spring-loaded by this in the radial direction on a commutator.
  • the bending spring is clamped with its remote from the sliding contact end in a carrier part (brush holder).
  • the bending spring arise in a deflection inhomogeneous fiber tension, which brings with it the risk of damage to the spiral spring in the region of the clamping by plastic deformation.
  • the invention has for its object to propose a holding element for a KommutatorschleifCount, in which the risk of damage is minimized by overbending. Furthermore, the object is to propose an electric motor with a correspondingly optimized holding element.
  • the invention is based on the idea of designing the spring section of the retaining element in such a way that the edge fiber stresses of the spring section are at least approximately constant in at least one section of the spring section.
  • Preferred is a design of the spring Section, in which the edge fiber stresses are not only constant in a section of the spring portion in the longitudinal direction, but along the entire longitudinal extent of the spring portion.
  • the spring section according to the invention is designed such that both the tensile stresses in the region of the largest bending radius and the compressive stresses in the region of the smallest bending radius in the longitudinal direction of at least one section, the flat, plate-shaped, spring section considered are constant.
  • the fiber stresses are viewed transversely to the longitudinal extent and at least approximately zero in the region of a neutral fiber.
  • An at least approximately constant edge-fiber stress iS of the invention is understood to mean a fiber tension which is essentially constant at every position in the longitudinal direction, ie deviates less than 10% from a fiber tension centered in the longitudinal direction. Preferably, the deviation is less than 5%, more preferably less than 1%.
  • Particularly preferred is an embodiment of the spring portion of the holding element, wherein the spring portion, at least a portion of the spring portion, even then has constant Randfaserhard in the longitudinal direction, if the spring portion, for example, for mounting an axle-fixed ball bearing beyond the normal Vortheseshus radially stretched on the outside, that is overstretched.
  • a designed according to the concept of the invention retaining element with a spring portion formed as described has significant advantages over known holding elements.
  • edge fiber tension is to be immediately adjacent to a fastening section with which the retaining element is fixed in a carrier part, at least approximately, preferably being exactly constant.
  • An attachment of the holding element preferably takes place by clamping into a carrier part (brush carrier).
  • a width extension formed from solid material is understood to be the width extension completed by solid material, preferably a constant thickness extension, i. the width extension formed by solid material takes into account any recesses provided in the spring section, in particular breakthroughs.
  • Io is the length of the subsection with a constant edge fiber tension or the entire length of the spring section if the edge fiber tension is to be constant over the entire longitudinal extension of the spring section.
  • the constant bo is the width extension of the partial section or of the entire spring section formed by solid material at an end facing away from the sliding contact, ie in a region immediately adjacent to a clamped region of the spring section or directly to a fastening section of the retaining element.
  • the value bo is thus that of solid material, i. Width taken along the longitudinal direction furthest away from the grinding contact, without the consideration of recesses, of the region of the spring section.
  • the variable x is a longitudinal extension coordinate and describes any position along the longitudinal extension of the subsection or the entire spring section.
  • the spring section or the partial section of the spring section is formed exclusively of solid material, an above-mentioned subordinate section will taper or spring section in the longitudinal direction to the holding portion, ie its width extension decreases seen in the longitudinal direction, preferably linearly from.
  • Particularly preferred is a symmetrical design of the spring section or of the partial section with respect to a longitudinal central axis (symmetry axis) of the partial section or of the spring section.
  • the actual width of the partial section and / or of the spring section is at least approximately constant in the longitudinal direction.
  • This can be realized, for example, by broadening a preferably symmetrical inner recess in the longitudinal direction towards the commutator sliding contact.
  • Particularly preferred is an embodiment in which the recess, in particular symmetrically widened in a triangular or trapezoidal manner towards the commutator grinding contact, in particular such that the solid material formed by The width extension adjacent to the recess obeys the previously described formula.
  • a holding section holding the commutator contact in particular clamping, has a rigid, ie. non-resilient ground plane.
  • this ground plane or footprint is instantaneous, i. seamless over into the spring portion of the holding element.
  • the spring section merges at its end facing away from the KommutatorschleifCount end in a mounting portion with which the holding element is fixed in an electric motor, in particular in a support member (brush holder).
  • the attachment portion is equipped with a latching geometry and / or a lug geometry to allow a defined setting of the holding element in the, preferably made of thermoplastic material, carrier part.
  • the retaining element can be clamped with its attachment portion in the support part and / or embossed by energy input in the form of heat or ultrasound at the attachment point. An undercut formed in this way prevents slipping out of the retaining element from its mounting position.
  • the invention also leads to an electric motor with a rotatably connected to an armature shaft commutator to which at least one KommutatorschleifCount rests, in a holding element formed according to the concept of the invention is held.
  • the electric motor preferably has an armature shaft-fixed ball bearing, in which the mounting is axially pushed axially through a carrier part having a plurality of holding elements each having a commutator grinding contact, during which the holding elements are overstretched.
  • 1 is a side view of a prestressed holding element
  • FIG. 2 is a perspective view of the holding element ge ⁇ according to FIG. 1,
  • Fig. 3 federkraftbeierhal a section of an electric motor, in which sev- eral holding elements are arranged in a plastic support part and each have a Kommuta ⁇ torschleif toast a commutator in a radial inward direction, and
  • Fig. 4 shows an alternative embodiment of a holding ⁇ element in which the spring portion seen in the longitudinal ⁇ extension has a constant overall width.
  • a holding element 1 for a KommutatorschleifCount 2 shown in Fig. 3 is shown.
  • the commutator sliding contact 2 is spring-loaded in the radial direction inwardly on a rotatably arranged commutator 3 of an electric motor 4.
  • the holding element 1 shown in FIGS is formed as a one-piece stamped and bent part made of metal, here from a spring plate.
  • the holding element 1 comprises a flat spring section 5, which is biased in the state shown in FIGS. 1 and 3 by bending transversely to its longitudinal extent.
  • the angle of attack ⁇ marked in FIG. 3 determines the contact force F A , with which the commutator sliding contact 2 rests on the outer circumference of the commutator 3.
  • the spring section 5 is designed such that the edge fiber stresses of a subsection 6 of the spring section 5 are at least approximately constant in the longitudinal direction of the subsection 6.
  • the spring section 5 tapers in the direction of the holding section 7, ie its width formed from solid material (transversely to the longitudinal extension) decreases symmetrically with respect to a non-illustrated longitudinal central axis.
  • the length Io of the partial section 6 essentially corresponds to the total length of the spring section 5 - the length Io of the partial section 6 is shorter than the total length of the spring section 5 only by the minimum distance a Holding portion 7 adjacent region (length a) of the spring portion 5 takes the width not linearly as viewed in the section 6 in the direction of the holding section 7, but even by the provision of outwardly curved transition radii 8.
  • the disadvantage of non-constant edge fiber stresses is accepted in the boundary region of the minimum length a to the holding section 7 in the embodiment shown in order to avoid loss of strength due to a notch effect that would occur if the spring section 5 sharp or with minimal transition radii in the holding section 7 would.
  • the spring portion 5 is adjacent to its in the drawing plane left end 9, at which its width is bo, to a mounting portion 10, which in the embodiment shown a tab for sliding on a Walkerdom 11th (see Fig. 3).
  • a mounting portion 10 which in the embodiment shown a tab for sliding on a Gardom 11th (see Fig. 3).
  • the support member 1 is supported in the carrier part 14 shown in FIG. 3 made of plastic.
  • the point indicated by the arrow 13 coincides with the left in the drawing plane, ie, facing away from the holding section 7 end 9 of the spring portion 5 together.
  • Alternative embodiments of the attachment portion 10, for example with a detent geometry are also feasible. Additionally or alternatively, the attachment portion 10 can be embossed with the support member 14.
  • Non-resilient ground plane 16 of the holding portion 7 Along both longitudinal sides of the holding portion 7 protrude outward resilient curved side walls 17, which serve for lateral guidance of KommutatorschleifANDes, which is received in a through hole 18, the rigid ground plane 16 penetrated.
  • the passage opening 18 is bounded laterally by four spring tabs 19 which are each offset by 90 ° and which receive the commutator sliding contact 2 in a clamping manner between them.
  • the spring tabs 19 extend in the direction of curvature of the holding element 1, whereas the side walls 17 are directed in an opposite direction.
  • Fig. 3 the support member 14 (brush holder) with three holding elements 1 is shown.
  • the three holding elements 1 each hold a KommutatorschleifCount 2 by clamping and spring-loaded in the radial direction inwardly with a spring force on the non-rotatably connected to a not shown armature shaft commutator 3.
  • the illustrated electric motor 4 is a between two power levels switchable electric motor, wherein the holding elements 1 shown in the right half of the drawing are arranged such that a targeted Fehlkommut réelle can be realized.
  • the total width of the spring section 5 is constant and corresponds at each position x along the longitudinal extension of the spring section 5 of the starting width bo. Nevertheless, the width extension of the spring section 5 formed by solid material is reduced in the longitudinal direction of the spring section 5 towards the holding section 7.
  • the width extension formed by solid material obeys at least approximately the formula:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

L'invention a pour objet un élément de support (1) pour un contact frottant de commutateur (2) d'un moteur électrique (4), comprenant une section à ressort (5) susceptible d'être précontrainte par flexion. L'invention prévoit que la section à ressort (5) soit réalisée de telle sorte que, lorsqu'elle est précontrainte, la tension des fibres périphériques soit au moins approximativement constante longitudinalement dans au moins une partie (6) s'étendant longitudinalement de la section à ressort (5), de préférence dans la totalité de la section à ressort (5).
EP08864586A 2007-12-20 2008-10-27 Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique Withdrawn EP2235801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007061745A DE102007061745A1 (de) 2007-12-20 2007-12-20 Halteelement für einen Kommutatorschleifkontakt eines Elektromotors sowie Elektromotor
PCT/EP2008/064494 WO2009080391A1 (fr) 2007-12-20 2008-10-27 Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique

Publications (1)

Publication Number Publication Date
EP2235801A1 true EP2235801A1 (fr) 2010-10-06

Family

ID=40241508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08864586A Withdrawn EP2235801A1 (fr) 2007-12-20 2008-10-27 Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique

Country Status (6)

Country Link
EP (1) EP2235801A1 (fr)
JP (1) JP5553768B2 (fr)
KR (1) KR101518797B1 (fr)
CN (1) CN101904059B (fr)
DE (1) DE102007061745A1 (fr)
WO (1) WO2009080391A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3030145B1 (fr) * 2014-12-12 2016-12-09 Valeo Equip Electr Moteur Ensemble comportant une cage a balai et un ressort a spirales, porte-balais, moteur electrique, et demarreur de vehicule automobile correspondants
DE102016225984A1 (de) * 2016-12-22 2018-06-28 Robert Bosch Gmbh Bürstenhalter für eine elektrische Maschine
DE102017223339A1 (de) * 2017-12-20 2019-06-27 Robert Bosch Gmbh Bürstenhalter-Bauteil für eine elektrische Maschine sowie elektrische Maschine
DE102019131806A1 (de) * 2019-11-25 2021-05-27 Phoenix Contact Gmbh & Co. Kg Halterahmen, Steckverbinder sowie elektronisches Gerät
DE102019131804A1 (de) * 2019-11-25 2021-05-27 Phoenix Contact Gmbh & Co. Kg Halterahmen, Steckverbinder sowie elektronisches Gerät
EP3840132B1 (fr) * 2019-12-19 2023-04-05 Phoenix Contact GmbH & Co. KG Cadre de maintien, connecteur enfichable et appareil électronique
CN114731011A (zh) * 2019-11-25 2022-07-08 菲尼克斯电气公司 保持框架、插式连接器以及电子设备

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1880810U (de) * 1963-07-22 1963-10-17 Richard Antretter Kollektorbuerste, insbesondere von motoren kleinerer abmessungen.
DE7609316U1 (de) * 1976-03-26 1976-08-12 Vdo Adolf Schindling Ag, 6000 Frankfurt Borstenhalter für elektrische Kleinmotore
JPS55106057A (en) * 1979-02-06 1980-08-14 Matsushita Electric Works Ltd Brush for small type motor
JPS605722Y2 (ja) * 1979-09-11 1985-02-22 株式会社 富士カ−ボン製造所 小型モ−タのブラシ装置
JPS5745278U (fr) * 1980-08-28 1982-03-12
JPS59135081U (ja) * 1983-02-28 1984-09-10 日立化成工業株式会社 ブラシ装置
JPS6229758U (fr) * 1985-08-07 1987-02-23
JPH0726658B2 (ja) * 1986-08-11 1995-03-29 日本発条株式会社 セラミックス材料等からなる板ばね
JPH0739280U (ja) * 1993-12-24 1995-07-14 自動車電機工業株式会社 小型モータのブラシ固定構造
JPH11266094A (ja) * 1998-03-18 1999-09-28 Advantest Corp Ｅｍｃ対策用接地構造を有するパネル
EP2325981A3 (fr) 2001-12-18 2017-05-17 Cutsforth Products Inc. Support de balais adapté pour être retiré sans arrêter la machine
DE10256831A1 (de) 2002-12-04 2004-06-24 Siemens Ag Trägerteil für Kommutatorbürsten eines Elektromotors
KR100638665B1 (ko) 2005-01-03 2006-10-30 삼성전기주식회사 처짐방지용 브러쉬 및 이를 구비하는 전기모터

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009080391A1 *

Also Published As

Publication number Publication date
KR20100106397A (ko) 2010-10-01
KR101518797B1 (ko) 2015-05-12
CN101904059B (zh) 2013-04-17
DE102007061745A1 (de) 2009-06-25
CN101904059A (zh) 2010-12-01
WO2009080391A1 (fr) 2009-07-02
JP5553768B2 (ja) 2014-07-16
JP2011507474A (ja) 2011-03-03

Similar Documents

Publication Publication Date Title
EP3853490B1 (fr) Dispositif d'arbre
EP1233205B1 (fr) Disposition de ressort
WO2009080391A1 (fr) Elément de support pour un contact frottant de commutateur d'un moteur électrique et moteur électrique
EP2844499B1 (fr) Dispositif de liaison d'essieu
DE69921313T2 (de) Halteanordnung für ein stabteil
EP2508768A1 (fr) Disque ressort et dispositif de palier doté d'un disque ressort
EP2807703B1 (fr) Connecteur femelle
EP2606555A2 (fr) Élément élastique pour fixer mécaniquement des aimants dans un rotor
EP2494181B1 (fr) Dispositif de transport de carburant
DE2830096C2 (fr)
DE102008059827B4 (de) Gleitschuh für ein Schaltelement einer Schalteinrichtung und Schaltelement mit einem solchen Gleitschuh
DE102011016496A1 (de) Leitungsverbinder mit einem Anschlussdorn für eine Kunststoff-Rohrleitung
WO2014056791A1 (fr) Moyen de serrage pour la fixation mécanique d'aimants dans un rotor en étoile
EP2871385A1 (fr) Guide d'essieu pour un châssis de véhicule
EP2459894B1 (fr) Dispositif de palier à roulement
WO2012156119A1 (fr) Ensemble palier
DE102016108069A1 (de) Kontaktelement zur Ausbildung einer elektrischen Verbindung mit einem Gegenelement, elektrische Verbindung und Scheibenwischermotor
EP2616289B1 (fr) Dispositif de fixation moulé pour un bras d'essuie-glace
DE102018220972A1 (de) Elektrischer Antrieb
EP3640499B1 (fr) Mâchoire de raccourcissement de chaîne
EP2216559B1 (fr) Etrier de serrage, moteur électrique ainsi qu'entraînement d'essuie-glace
EP1941180B1 (fr) Dispositif de retenue pour des objets longs et souples tels que des câbles
WO2008092523A1 (fr) Système d'aimant statorique
DE102016205629A1 (de) Reibungskupplung
DE10300695B4 (de) Halterung, für eine Stange, insbesondere für eine Blitzfangstange sowie Keil für eine derartige Halterung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100720

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20140205

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20150403