EP2317632A2 - Balai en charbon doté d'une limite de température modifiée - Google Patents

Balai en charbon doté d'une limite de température modifiée Download PDF

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Publication number
EP2317632A2
EP2317632A2 EP10188968A EP10188968A EP2317632A2 EP 2317632 A2 EP2317632 A2 EP 2317632A2 EP 10188968 A EP10188968 A EP 10188968A EP 10188968 A EP10188968 A EP 10188968A EP 2317632 A2 EP2317632 A2 EP 2317632A2
Authority
EP
European Patent Office
Prior art keywords
temperature
electric machine
carbon brushes
deformable component
spring
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Withdrawn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
EP10188968A
Other languages
German (de)
English (en)
Other versions
EP2317632A3 (fr
Inventor
Karl-Otto Schmidt
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.)
SEG Automotive Germany 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 EP2317632A2 publication Critical patent/EP2317632A2/fr
Publication of EP2317632A3 publication Critical patent/EP2317632A3/fr
Withdrawn legal-status Critical Current

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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
    • H01R39/59—Means structurally associated with the brushes for interrupting current
    • 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
    • H01R39/18—Contacts for co-operation with commutator or slip-ring, e.g. contact brush
    • H01R39/26—Solid sliding contacts, e.g. carbon brush

Definitions

  • DE 34 26 996 A1 refers to an electric motor that is used to drive a fuel delivery pump.
  • the electric motor comprises a rotor and a magnetic system belonging to a stator of the electric motor, which has an annular ferromagnetic yoke body and at least one permanent magnetic magnet segment arranged on its inner wall.
  • the magnet segment is fixed in a well-defined position by means of a tube-like holding device which is inserted in a suitable manner into the return ring and locked against the return ring.
  • a particularly effective way of securing the magnet system in the return ring is achieved in that the holding device for each magnet segment has a breakthrough whose size is matched to the projection dimensions of the magnet resulting from radial observation and the holding device further comprises spring means which the magnetic segment against the Press inner wall of return ring.
  • the holding device is designed to fit the return ring and inserted into this and is locked by means of a protruding on the outer circumference of the nose, which is received in an open-edge groove of the return ring, against this.
  • DE 101 48 652 A1 relates to a DC machine and a method for attaching magnets to a pole housing of a DC machine.
  • a magnetic holding device is attached to which the magnets, which are in particular permanent magnets, are held.
  • the magnet holding device is fixed to the inner periphery of the pole housing and formed by an annular holding cage.
  • the holding cage is provided with an extending in the axial direction, continuous slot and resilient, preferably made in one piece.
  • the holding cage is machined from a board, preferably stamped and then brought into its ring shape by rolling.
  • the holding cage according to DE 101 48 652 A1 is frictionally held in the pole housing of the DC machine. The frictional connection is generated due to material-related restoring forces of the rolled in its annular shape holding cage, which are possibly still be increased by overpressing the rolled holding cage.
  • the holding cage has pockets for receiving a respective magnet.
  • an electrical machine such as e.g. the starting device of an internal combustion engine to bring about an interruption of the current flow between the carbon brushes and the commutator thereby.
  • This is done either by a spring-loaded carbon brushes, which is released at high temperature increase by deformation of a bi-metal stop, so that the contact pressure of the carbon brush is lifted to the commutator.
  • there is an interruption of the current flow by breaking the rivet connection when using a temperature-dependent deformable spring washer.
  • the carbon brushes are usually performed in a quiver.
  • a setting device one side of the carbon or graphite brush is juxtaposed by a spring or another setting element on the commutator or on its circumference arranged single slats pressed.
  • the adjusting device on which the spring is supported for setting the carbon brushes to the commutator triggers, so that the contact force of the carbon brush is abruptly lifted to the commutator and thus interrupting the flow of current.
  • the bi-metal actuator includes a bi-metal having an active and a passive component.
  • active components of Thermo-Bi-metals are mainly alloys used in various compositions of nickel, iron, manganese or chromium.
  • the passive components usually consist of "Invar", an alloy of 36% nickel with iron.
  • a particularly simple and elegant reset possibility of the carbon brushes after cooling of the starter can be achieved.
  • the quiver for receiving the carbon brushes in the pole tube arranged openings and the simple insertion of a pin the carbon brushes, as soon as the Anstellelemente have taken their original position, are returned to their original position.
  • a pin is inserted into the corresponding arranged to the position of the individual brush quiver on the pole tube openings, the spring pressed back into the quiver, which then supported with their carbon brushes facing end face on the assumed normal position has Anstell Structure.
  • a current guide enabling rivet connection is broken.
  • a spring washer is inserted between a contact plate, with material or form-locking connected strand and a contact plate with through hole, which are connected to each other via a rivet connection.
  • the spring washer In the normal temperature range, the spring washer is flat against the opposite contact plate with through hole.
  • the spring washer deforms in such a way that it breaks open the rivet connection, ie it exerts an axial force on the rivet and the rivet head due to an inadmissible increase in temperature due to deformation, which is dependent on the temperature increase that occurs.
  • Selection of the spring washer can be set to certain temperature levels at which it comes to breaking the rivet connection.
  • the representation according to FIG. 1 is to take a starting device in a longitudinal section.
  • FIG. 1 a starter 10 is shown.
  • the starting device 10 has, for example, a starter motor 13 and an engagement relay 16.
  • the starter motor 13 and the engagement relay 16 are attached to a common drive bearing plate 19.
  • the starter motor 13 is functionally to drive a starter pinion 22 when it is meshed in the ring gear 25 of an internal combustion engine, not shown here.
  • the starter motor 13 has a pole tube as a housing 28, which carries on its inner circumference pole pieces 31, which are each wrapped by a field winding 34.
  • the pole shoes 31 in turn surround an armature 37, which has an armature packet 43 constructed from fins 40 and an armature winding 49 arranged in grooves 46.
  • the armature package 43 is pressed onto a drive shaft 44.
  • a commutator 52 which is constructed from individual commutator bars 55.
  • the commutator bars 55 are so electrically connected in a known manner with the armature winding 49 that results in energizing the commutator fins 55 by carbon brushes 58, a rotational movement of the armature 37 in the pole tube 28.
  • a arranged between the Einspurrelais 16 and the starter motor 13 power supply 61 supplies in the ON state both the carbon brushes 58 and the field winding 34 with power.
  • the drive shaft 44 is commutator side supported with a shaft journal 64 in a sliding bearing 67, which in turn is held stationary in a commutator bearing cover 70.
  • the commutator 70 is in turn secured by means of tie rods 73 which are arranged distributed over the circumference of the pole tube 28 (screws, for example 2, 3 or 4 pieces) in the drive end plate 19. It supports the pole tube 28 on the drive bearing plate 19 and the Kommutatorlagerdeckel 70 on the pole tube 28th
  • the armature 37 is adjoined by a sun gear 80, which is part of a planetary gear 83.
  • the sun gear 80 is surrounded by a plurality of planetary gears 86, which are usually three planet wheels 86, by means of Rolling bearings 89 are supported on journals 92.
  • the planet wheels 86 roll in a ring gear 95, which is mounted outside in the pole tube 28.
  • the planet gears 86 are adjoined by a planet carrier 98, in which the axle journals 92 are received.
  • the planet carrier 98 is in turn stored in an intermediate bearing 101 and a slide bearing 104 arranged thereon.
  • the intermediate bearing 101 is designed cup-shaped, that in this both the planetary carrier 98 and the planet gears 86 are added. Furthermore, the ring gear 95 is arranged in the cup-shaped intermediate bearing 101, which is ultimately closed by a cover 107 relative to the armature 37. Also, the intermediate bearing 101 is supported with its outer circumference on the inside of the pole tube 28.
  • the armature 37 has on the end remote from the commutator 52 end of the drive shaft 44 has a further shaft journal 110, which is also received in a sliding bearing 113.
  • the sliding bearing 113 in turn is received in a central bore of the planet carrier 98.
  • the planetary carrier 98 is integrally connected to the output shaft 116.
  • This output shaft 116 is supported with its end 119 facing away from the intermediate bearing 101 in a further bearing 122 which is fixed in the drive bearing plate 19.
  • the output shaft 116 is divided into several sections.
  • the portion which is arranged in the sliding bearing 104 of the intermediate bearing 101 a section with a straight teeth 125 (internal teeth), which is part of a shaft-hub connection.
  • This shaft-hub connection 128 in this case allows the axially rectilinear sliding of a driver 131.
  • This driver 131 is a sleeve-shaped extension which is formed integrally with a cup-shaped outer ring 132 of the freewheel 137.
  • This freewheel 137 (Richtgesperre) further consists of the inner ring 140 which is disposed radially within the outer ring 132. Between the inner ring 140 and the outer ring 132 clamping body 138 are arranged. These clamp bodies 138, in cooperation with the inner and outer rings, prevent relative rotation between the outer ring and the inner ring in a second direction. In other words, the freewheel 137 allows a relative movement between inner ring 140 and outer ring 132 in one direction only.
  • the inner ring 140 is formed integrally with the starter pinion 22 and its helical teeth 143 (external helical teeth).
  • the engagement relay 16 has a bolt 150, which constitutes an electrical contact and which is connected to the positive terminal of an electric starter battery, which is not shown here.
  • This bolt 150 is passed through a relay cover 153.
  • the relay cover 153 terminates a relay housing 156 which is secured to the drive endshield 19 by a plurality of fasteners 159, which may be, for example, screws.
  • a pull-in winding 162 and a so-called holding winding 165 is further arranged.
  • the pull-in winding 162 and the holding winding 165 both cause an electromagnetic field in the switched-on state, which flows through both the relay housing 156, which is made of electromagnetically conductive material, and a linearly movable armature 168 and an armature return 172.
  • the armature 168 carries a push rod 174, which is moved in the direction of linear retraction of the armature 168 in the direction of a switching pin 177. With this movement of the push rod 174 to the switching pin 177 this is moved from its rest position in the direction of two contacts 180, 181, so that attached to the contacts 180 and 181 at the end of the switching pin 177 contact bridge 184, both contacts, 180 and 181, connects electrically with each other. As a result, electrical power is conducted from the bolt 150 across the contact bridge 184 to the power supply 61 and thus to the carbon brushes 58.
  • the starter motor 13 is energized.
  • the engagement relay 16 or the armature 168 also has the task, with a tension member 187 to operate a rotatably disposed within the drive bearing plate 19 lever.
  • This lever 190 usually designed as a fork lever, surrounds two "sinking" not shown here on its outer circumference two discs 193, 194 to move a clamped between these driver ring 197 to the freewheel 137 back against the resistance of the spring 200 and thereby the starter pinion 22nd into the ring gear 25 concursspuren.
  • FIG. 2 shows a first embodiment of a device with which a temperature-dependent interruption of a current flow is made.
  • the representation according to FIG. 2 It can be seen that the carbon brush 58 is formed in a quiver 210.
  • the carbon brush 58 includes a first end face 212, with which the carbon brush 58 to the commutator fins 55 of the commutator 52 of the electric machine 10 as shown in FIG FIG. 1 is adjustable.
  • the side surfaces of the carbon brushes 58 generally formed with a cylindrical cross section or a square or rectangular cross section are guided in the quiver 210.
  • the second end face 214 of the carbon brush 58 is in in FIG. 2 shown salaried state 22 acted upon by a spring element 216.
  • the spring element 216 may be, for example, a coil spring or coil spring. As shown in the illustration FIG.
  • the spring 216 is supported in the salaried state 222 as shown in FIG. 2 on attacks of a temperature-dependent deformable component 218, which in the in FIG. 2 illustrated embodiment of the proposed solution according to the invention as bi-metal 220 is formed.
  • FIG. 3 is a triggered state of in FIG. 2 to remove in the salaried state device for interrupting a current flow.
  • the temperature-dependent deformable component 218 triggers. As shown in the illustration FIG. 3 As can be seen, in the triggered state 224, the temperature-dependent deformable component 218 is deformed such that the previously supporting the spring 216 sections are radially displaced in the lateral direction and the spring element 216 extends in a vertical direction from the quiver 210. In the triggered state 224 as shown in FIG. 3 is therefore the contact force in the salaried state 222 according to FIG. 2 acts on the first end face 212 of the carbon brush 58, lifted, so that the current flow between the carbon brush 58 and the Kommutatorlamellen 55 of the commutator 52 of the electric machine 10 is interrupted.
  • the quiver 210 in which the carbon brush 58 is guided in the vertical direction is not deformed.
  • the spring element 216 can be reset after cooling again.
  • the triggering temperature is of the order of 300 ° C, for example about 315 ° C.
  • the representation according to FIG. 4 is a second embodiment of the present invention proposed device for interrupting the flow of current to remove.
  • an electrical connection 226 includes a Wegsniet 228 on which a rivet head 232 is formed.
  • a contact plate 234 with a passage opening and a contact plate 238, to which a stranded wire is fastened are connected to one another in an electrically conductive manner.
  • a temperature-dependent deformable component 236 in the form of a spring washer. At normal temperature remains a deformation of the temperature-dependent deformable component 236, designed here as a spring washer.
  • FIG. 5 shows the in FIG. 4 illustrated electrical connection with increasing temperature.
  • the temperature-dependent deformable component in the form of the spring washer 236 as shown in FIG. 5 deformed, ie curved.
  • an axial force acts on the rivet connection 228, which comprises the rivet 230, which is secured to the outside of the contact plate with through-opening 234 by a rivet head 232.
  • FIG. 6 shows that the electrical connection according to the resulting FIGS. 4 and 5 is interrupted.
  • the riveted joint 228 is blown up. In the in the FIGS. 4, 5 and 6 illustrated embodiment, it lacks a reset option, so that the triggering temperature is set to about 600 ° C. At higher temperatures there is a risk of spontaneous combustion due to gas formation in a starting device 10.
  • the triggering temperature may also vary from starter type to starter type depending on the materials used in starter 10.
  • the representation according to FIG. 7 is to remove a brush holder an electric machine.
  • Reference numeral 240 is generally fabricated as a plastic injection molded component and includes a number of carbon brushes.
  • a first carbon brush 242, a second carbon brush 244, a third carbon brush 246 and a fourth carbon brush 248 are accommodated on the brush holder 240.
  • Each of the carbon brushes 242, 244, 246, 248 is guided in a quiver 210.
  • FIG. 8 shows an enlarged view of one of the carbon brushes 242, 244, 246, 248, which are arranged distributed on the circumference of the brush holder 240 in the circumferential direction 254.
  • the attacks 256 of the temperature-dependent deformable member 218 also directly overlap the second end face 214 of the carbon brush 58.
  • FIG. 9 is the in FIG. 8 shown, representing the salaried state according to the invention proposed arrangement reproduced in the tripped state.
  • the temperature-dependent deformable component 218, made as bi-metal 220 is deflected laterally and the front side of the clamping body 258 and the second end face 214 of the carbon brush 58 releases.
  • the contact force with which the first end face 212 of the carbon brush 58 is employed against the commutator fins 55 of the commutator 52 abruptly breaks down, so that the current flow, cf. Representation according to FIG. 3 , is suddenly interrupted.
  • FIGS. 10 and 11 a reset device can be seen, with which a device according to the FIGS. 2, 3 . 7 . 8 and 9 from the tripped state after cooling in the cooled state is resettable.
  • openings 250 are associated with the respective carbon brushes 242, 244, 246, 248 in the circumferential direction 254 of the pole tube 28 in the area of the brush holder 240.
  • FIG. 11 it is an enlarged view of a detail according to the reset device, which in FIG. 10 is shown.

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  • Motor Or Generator Current Collectors (AREA)
EP10188968.1A 2009-10-30 2010-10-27 Balai en charbon doté d'une limite de température modifiée Withdrawn EP2317632A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009046198A DE102009046198A1 (de) 2009-10-30 2009-10-30 Kohlebürste mit veränderter Temperaturgrenze

Publications (2)

Publication Number Publication Date
EP2317632A2 true EP2317632A2 (fr) 2011-05-04
EP2317632A3 EP2317632A3 (fr) 2017-03-29

Family

ID=43638690

Family Applications (1)

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EP10188968.1A Withdrawn EP2317632A3 (fr) 2009-10-30 2010-10-27 Balai en charbon doté d'une limite de température modifiée

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EP (1) EP2317632A3 (fr)
DE (1) DE102009046198A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160336832A1 (en) * 2014-01-23 2016-11-17 Valeo Equipements Electriques Moteur Brush-holder for a motor vehicle starter provided with a thermal protection system, and corresponding motor vehicle starter
CN110673667A (zh) * 2018-07-03 2020-01-10 郑州宇通客车股份有限公司 一种车用充电连接装置的智能温控方法及装置
WO2025040477A1 (fr) * 2023-08-21 2025-02-27 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Systèmes de balais pour moteur électrique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426996A1 (de) 1984-07-21 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromotor, insbesondere zum antreiben einer kraftstoffoerderpumpe
DE10148652A1 (de) 2001-10-02 2003-04-17 Bosch Gmbh Robert Gleichstrommaschine und Verfahren zum Befestigen von Magneten an einem Polgehäuse einer Gleichstrommaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3467827D1 (en) * 1984-08-13 1988-01-07 Siemens Ag Thermic overload protection for a commutator or slipring-motor
JPS6264238A (ja) * 1985-09-13 1987-03-23 Nippon Denso Co Ltd 電動機
JP3320395B2 (ja) * 1995-07-19 2002-09-03 東芝テック株式会社 電気機器
US6037685A (en) * 1999-02-12 2000-03-14 Shop-Vac Corporation Thermal protection apparatus for electric motors
DE19911070B4 (de) * 1999-03-12 2007-04-26 Robert Bosch Gmbh Elektromotor mit einer Thermosicherung
JP2002051510A (ja) * 2000-08-01 2002-02-15 Hitachi Ltd 直流電動機
DE102007058912A1 (de) * 2007-11-30 2009-06-04 Robert Bosch Gmbh Elektrische Antriebsmaschine mit einem Stator und einem Rotor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3426996A1 (de) 1984-07-21 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Elektromotor, insbesondere zum antreiben einer kraftstoffoerderpumpe
DE10148652A1 (de) 2001-10-02 2003-04-17 Bosch Gmbh Robert Gleichstrommaschine und Verfahren zum Befestigen von Magneten an einem Polgehäuse einer Gleichstrommaschine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160336832A1 (en) * 2014-01-23 2016-11-17 Valeo Equipements Electriques Moteur Brush-holder for a motor vehicle starter provided with a thermal protection system, and corresponding motor vehicle starter
US10050489B2 (en) * 2014-01-23 2018-08-14 Valeo Equipements Electriques Moteur Brush-holder for a motor vehicle starter provided with a thermal protection system, and corresponding motor vehicle starter
CN110673667A (zh) * 2018-07-03 2020-01-10 郑州宇通客车股份有限公司 一种车用充电连接装置的智能温控方法及装置
CN110673667B (zh) * 2018-07-03 2021-12-21 郑州宇通客车股份有限公司 一种车用充电连接装置的智能温控方法及装置
WO2025040477A1 (fr) * 2023-08-21 2025-02-27 Brose Fahrzeugteile Se & Co. Kommanditgesellschaft, Bamberg Systèmes de balais pour moteur électrique

Also Published As

Publication number Publication date
EP2317632A3 (fr) 2017-03-29
DE102009046198A1 (de) 2011-05-05

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