EP3231046A1 - Ensemble comportant une cage à balai et un ressort à spirales, porte-balais, moteur électrique, et démarreur de véhicule automobile correspondants - Google Patents
Ensemble comportant une cage à balai et un ressort à spirales, porte-balais, moteur électrique, et démarreur de véhicule automobile correspondantsInfo
- Publication number
- EP3231046A1 EP3231046A1 EP15818000.0A EP15818000A EP3231046A1 EP 3231046 A1 EP3231046 A1 EP 3231046A1 EP 15818000 A EP15818000 A EP 15818000A EP 3231046 A1 EP3231046 A1 EP 3231046A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- width
- spring
- brush
- cage
- 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- Withdrawn
Links
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
- H01R39/38—Brush holders
- H01R39/41—Brush holders cartridge type
- H01R39/415—Brush holders cartridge type with self-recoiling spring
-
- 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
- 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
-
- 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
- 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
- H02K5/148—Slidably supported 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
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/10—Connectors or connections adapted for particular applications for dynamoelectric machines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R2201/00—Connectors or connections adapted for particular applications
- H01R2201/26—Connectors or connections adapted for particular applications for vehicles
Definitions
- the invention relates to an assembly comprising a brush cage and a spiral spring, as well as to the brush holder, the electric motor and the corresponding starter.
- the invention finds a particularly advantageous, but not exclusive, application with motor vehicle starters, in particular those installed in vehicles equipped with the function of stopping and automatically restarting the engine (so-called "stop and start” function). " in English).
- a brush holder is mounted on the rotor shaft of a starter so as to cooperate the brushes with an electrical collector integral with the rotor shaft.
- the brush holder comprises a support plate carrying a set of cages each serving as a housing for a broom.
- the brushes made of electrically conductive material allow the power supply of the rotor by switching the electric current in the conductors of the rotor.
- each blade has a face intended to rub against the conductive blades of the collector connected to the rotor winding.
- An elastic means such as a spring, exerts on each broom received in a cage a force in the direction of the manifold to ensure contact between the blade and the collector blades.
- the brushes have alternating polarities.
- the positive polarity brushes are electrically connected, via their respective braid, to an inter-brush connector which is also electrically connected to the power wire from the starter contactor.
- the brushes for the current return are electrically connected to the mass of the machine by means of their respective braid welded to the plate.
- a spiral type spring comprising a wound portion mounted on a leg and an arm extending from one end of the portion. wound to bear on an end face of the brush opposite the face in contact with the collector blades.
- the arm passes through an opening in a side wall of the brush cage.
- the problem is to be able to make springs with a relatively large thrust force knowing that the diameter of the wound portion is limited because of the need to obtain a compact assembly and that the thickness is also limited in order to be able to use springs low cost standards.
- the invention therefore proposes to modify the width parameter of the spring in order to adapt its force, and this without modifying the structure of the broom cage inasmuch as an increase in the opening allowing the passage of the spring arm would weaken mechanically. the cage.
- the invention proposes an assembly comprising a brush cage and a spiral spring
- said spiral spring comprising an axis, a portion wound around said axis and an arm extending from one end of said wound portion
- said broom cage comprising at least one side wall provided with an opening for the passage of said arm through said side wall so that one end of said arm can bear on at least a part of an end face a broom,
- said arm comprises a first portion whose width measured along said axis is different from the width of said wound portion measured along said axis of said spiral spring.
- said arm comprises a first portion whose width measured along said axis is less than the width of said wound portion measured along said axis of said spring.
- the first portion of said arm is at least the portion of the arm passing through said opening of said side wall between a start of travel of said spring and a limit of said spring.
- said arm comprises a second portion extending between said first portion and the end of said arm located in said broom cage and in that the width of said second portion is greater than the width of said first portion.
- the width of said second portion is equal to the width of said wound portion of said spring.
- said first portion of said arm has a width of between 4 and 8mm.
- said wound portion has a width of more than 1 mm with respect to the width of said first portion of said arm.
- said brush cage comprises a tab extending outside a housing for said brush, said wound portion of said spring being mounted around said tab.
- the invention also relates to an electric motor brush holder equipped with an assembly as previously defined.
- the invention further relates to an electric motor comprising a brush holder as previously defined.
- the invention also relates to a motor vehicle starter comprising an electric motor as defined above.
- Figure 1 is a perspective view of an electric motor brush holder according to the present invention
- Figure 2 is a perspective view of the plate of the brush holder of Figure 1;
- Figures 3a to 3c respectively correspond to a side view and two perspective views according to two different viewing angles illustrating a first embodiment of a broom cage according to the present invention
- Fig. 4 is a perspective view illustrating a second embodiment of a broom cage according to the present invention.
- Fig. 5 is a perspective view illustrating a third embodiment of a broom cage according to the present invention
- Figures 6a to 6c are perspective views illustrating the three different embodiments of a spiral spring according to the present invention.
- FIG 1 shows a brush holder 10 according to the invention for use with a motor vehicle starter.
- This brush holder 10 comprises a support plate 12 of substantially annular shape on which is fixed a set of stands 13 each serving as a housing for a brush 15.
- An axis X of the support plate 12 corresponds to the axis of the holder. brooms 10.
- the support plate 12 clearly visible in FIG. 2 is a one-piece piece comprising a metal plate 121 and overmolded layers 122 made on either side of the metal plate 121.
- the overmolded layers 122 are made by means of a plastic material ensuring good electrical insulation.
- the overmolded layers 122 cover all the risk areas of the plate 12, that is to say, all the areas where a short circuit could appear.
- the overmolded layers 122 are heat sensitive and deformable from a predetermined temperature so as to cause a short circuit in case of overheating.
- the plastic material used for overmolded layers 122 is a thermoplastic material such as polyamide PA4.6 or PA6.6 or fiber-loaded polypropylene PPS.
- the support plate 12 and the cages 13 that it carries are fixed on a cover (not shown) forming a rear bearing for the rotor shaft of the electric machine.
- the central portion of the plate 12 has an orifice 16 through which the assembly that it forms with the brush cages 13 and the brushes 15 is mounted around the starter rotor shaft.
- Each brush 15 is slidably mounted inside a cage 13 which is open on the X-axis side to allow the brushes 15 to be placed in electrical contact with blades carried by a commutator of an electric machine rotor. (not shown)
- the brushes 15 have alternating polarities.
- the brushes 15 of positive polarity are electrically connected, via their respective braid 19, to an inter-brush connector 20 which is also electrically connected to the supply wire from the contactor starter.
- the inter-brush connector 20 is connected to the supply wire via a pin 21 passing through a grommet 22 cooperating with the starter casing to seal the brush holder 10.
- the positive brushes 15 and their corresponding cages 13 are electrically isolated from the negative polarity for proper operation of the starter. This insulation is obtained by the overmolded layers 122.
- the flexible braids 19 are advantageously made of copper or copper alloy to facilitate welding on the plate 121. The braids 19 may also play a fuse role. Furthermore, the brushes 15 of negative polarity for the current return are electrically connected to the mass of the machine by means of their respective braid 19 welded to the plate 121 of the plate 12.
- each brush cage 13 has a housing 23 for the brush 15 defined by two side walls 26, 27 parallel vis-à-vis interconnected by a wall 28 upper link.
- Each cage 13 is fixed on the plate 12 by means of a fixing device 31 described in more detail below belonging to end walls 32, 33 coming from the lower edges of the side walls 26, 27.
- a spiral spring 36 associated with each cage 13 radially biases the corresponding blade 15 to contact blades of the collector.
- each spring 36 comprises a wound portion 37 mounted around a lug 38 extending axially with respect to the X axis and an arm 39 intended to bear against a face of the brush 15 opposite to the face in contact with the collector blades.
- the tab 38 which extends outside the housing 23 of the blade 15, is in this case obtained by folding one of the end walls 32, 33 of each cage 13.
- the side wall 26 has an opening 43 for the passage of the arm 39 of the spring 36.
- This side wall 26 has a length L 0, measured in a direction perpendicular to the X axis, between a first end 51 farthest from the manifold and a second end 52 closest to the manifold (located on the side opposite the arm 39 of the spring).
- the opening 43 comprises at least a first portion 431 between the two ends 51, 52 which widens widening towards the second end 52, that is to say that the width L1 of this first portion 431 measured next the X axis increases when moving towards the second end 52.
- This first portion 431 of the opening 43 comprises two edges 44, 45 vis-à-vis formed in the side wall 26.
- the opening 43 further comprises a second portion 432 extending between the first end 51 and the first portion 431. This second portion 432 widens widening toward the first end 51, that is to say that the width L2 of this second portion 432 measured along the X axis increases when moving towards the first end 51. This second portion 432 makes it easier to insert and center the arm 39 of the spring 36.
- the opening 43 comprises a third portion 433 extending between the second end 52 and the first portion 431.
- This third portion 433 widens to widen towards the first end 51, that is to say that the width L3 of this third portion 433 measured along the X axis increases when moving towards the first end 51.
- the opening 43 comprises a fourth portion 434 extending between the second end 52 and the third portion 433. This fourth portion
- this fourth portion 434 is delimited by parallel edges of the wall 26.
- this fourth portion 434 has a width L4 measured along the substantially constant axis X.
- the edges of this portion 434 separate two walls 55, 56 forming the wall 26. These two generally L-shaped walls 55, 56 are interconnected by a fin 57.
- the fin 57 comprises two parts 571, 572 extending in two different planes inclined with respect to each other, as is clearly visible in FIG. 3c. It should be noted that the fourth portion 434 of the opening 43 can be extended in a notch 58 formed in the fin 57 to allow the passage of the braid 19 of the brush 15 housed in the corresponding cage 13 closest to the collector. As can be seen in FIG. 3b, the other side wall 27 has an opening 43 'having a first portion 431' and a second portion 432 'having a configuration similar to the first portion 431 and the second portion 432 respectively.
- the inclined edges 44 'and 45' formed in the wall 27 are interconnected by an edge 46 'having an orientation parallel to the axis X.
- the side wall 27 is formed by two walls which are interconnected on the collector side by a strip of material extending in the plane of the wall 27.
- only one of the two edges 44 'and 45' is inclined.
- a fin 59 is derived from an edge of the wall 27 to mechanically stiffen the cage 13.
- the spring 36 is positioned on the side of the wall 27, so that its arm 39 passes through the portions 431 ', 432' of the opening 43 '; while the braid 19 is positioned on the side of the wall 26 to be able to pass at the end of travel of the spring 36 by the open portions 433, 434 as well as by the notch 58 of the fin 57 so that the braid 19 can move as close as possible to the manifold to maximize the use volume of the blade 15.
- the opening 43 of the wall 26 is devoid of a fourth portion 434, the third portion 433 extending directly in the notch 58 made in the fin 57.
- the opening 43 separates two walls 55, 56 L-shaped interconnected by the fin 59.
- the side wall 27 provided with its opening 43 ' and two corresponding portions 431 'and 432' are similar to that of the embodiment of Figures 3a to 3c.
- the two walls 26, 27 are symmetrical and have identical openings 43 having a first portion 431, a second portion 432, and a third portion 433 extending into a notch 58 made in the corresponding fin 57, 59, as in the embodiment of FIG. 4.
- the fixing system to the plate 12 is formed by two pairs of legs 61, 62.
- the legs 61, 62 of each pair are derived from two edges vis-à-vis the end walls 32, 33.
- a leg 61 of each pair is intended to pass through the plate 12 through a hole 63 made according to its thickness (see Figure 2).
- the other leg 62 of each pair bears against one side of the inner contour delimiting the orifice 16.
- the legs 61, 62 of each pair are intended to be folded towards each other against the plate 12.
- the fastening system 31 comprises at least one rivet passing through the plate 12 and an end wall 32, 33 of the broom cage 13.
- Each cage 13 may in an exemplary embodiment be obtained by folding a plate of thin sheet so as to form substantially an omega whose end branches are fixed on the plate 12.
- the holes 63 receiving the legs 61, 62 of the cages 13 of negative polarity and the areas of the plate 12 in contact with the cages 13 receiving the brushes 15 of negative polarity are not electrically isolated, so that a electrical contact can intervene between the cages 13 of negative polarity and the plate 121 via the legs 61, 62.
- This contact is not harmful to the operation of the starter, insofar as it participates in establishing the electrical contact between the parts intended to be at the same electrical potential, in this case the ground potential in this application.
- the coiled portion 37 of the spring 36 is formed by a plurality of coaxial coils 371 about a Y axis.
- the arm 39 extends from one end of the coiled portion 37 mounted around the lug 38.
- the arm 39 is intended to bear against the rear face of the brush 15 opposite the face of the brush 15 bears against the blades of the collector.
- the arm 39 comprises a portion 391 whose width L5 measured along the Y axis is less than the width L6 of the wound portion 37 measured along the Y axis.
- This portion 391 is delimited. by two recesses 68 coming from the part of the arm 39 having a width identical to the width L6 of the wound portion 37 and extending towards the inside of the material band of the arm 39.
- This portion 391 of the arm 39 of reduced width is at least equal to the length of the portion of the arm 39 passing through the opening 43 of the side wall 26 between the start of travel of the spring 36 and the end of travel of the spring 36. specifies here that the start of travel of the spring 36 corresponds to the position of the arm 39 of the spring 36 for a blade 15 at the beginning of life having a maximum length, while the end of stroke of the spring 36 corresponds to a position of the arm 39 of the spring 36 for a broom 15 at the end of life having a minimum length. In this case, the portion 391 extends to the end of the arm 39 located in the cage 13 which bears against the blade 15.
- the portion 391 of reduced width is substantially equal to the length of the portion of the arm 39 passing through the opening 43 of the side wall 26 between the beginning and end of travel of the spring 36.
- the arm 39 may comprise a second portion 392 extending between the first portion 391 and the end of the arm 39 located in the cage 13.
- the width L7 of the second portion 392 is greater than the width L5 of the first portion 391.
- the width of the second portion 392 is equal to the width L6 of the wound portion 37.
- the portion 392 is delimited at one end by the two recesses 68 and the other side by two other similar recesses 69 located between the first 391 and the second 392 portions.
- the first portion 391 has a width L5 of between 4 and 8 mm.
- the wound portion 37 has a width L6 of more than 1 mm with respect to the width L5 of the first portion 391.
- the metal strip forming the spiral spring 36 has a thickness of between 0.25 and 0.7 mm.
- the diameter of the wound portion 37 is of the order of 10 mm. Of course, these dimensions may vary depending on the application.
- the arm 39 of the spring 36 has a portion 391 having a width L5 greater than the width L6 of the wound portion 37, as shown in Figure 6c.
- the recesses 68 extend from the part of the arm 39 having the same width as the wound portion 37 towards the outside of the material band forming the spring 36.
- the end of the arm 39 of the spring 36 is supported only against a portion of the end face. This part may correspond for example to the bottom of a groove 75 to facilitate guiding the arm 39 of the spring 36 during its displacement, as shown in Figure 1.
- the brush holder 10 comprises more than four brushes 15, each brush 15 being for example associated with another brush positioned on the opposite side of the plate 12.
- the brush holder 10 is here an electric motor brush holder of a motor vehicle starter.
- the brush holder 10 could also belong to an alternator or an alternator-starter.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Current Collectors (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1462293A FR3030145B1 (fr) | 2014-12-12 | 2014-12-12 | Ensemble comportant une cage a balai et un ressort a spirales, porte-balais, moteur electrique, et demarreur de vehicule automobile correspondants |
PCT/FR2015/053425 WO2016092223A1 (fr) | 2014-12-12 | 2015-12-10 | Ensemble comportant une cage a balai et un ressort a spirales, porte-balais, moteur électrique, et démarreur de véhicule automobile correspondants |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3231046A1 true EP3231046A1 (fr) | 2017-10-18 |
Family
ID=52692813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15818000.0A Withdrawn EP3231046A1 (fr) | 2014-12-12 | 2015-12-10 | Ensemble comportant une cage à balai et un ressort à spirales, porte-balais, moteur électrique, et démarreur de véhicule automobile correspondants |
Country Status (6)
Country | Link |
---|---|
US (1) | US10700485B2 (fr) |
EP (1) | EP3231046A1 (fr) |
JP (1) | JP2018503019A (fr) |
CN (1) | CN107005011B (fr) |
FR (1) | FR3030145B1 (fr) |
WO (1) | WO2016092223A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3032840B1 (fr) * | 2015-02-13 | 2018-04-13 | Valeo Equip Electr Moteur | Porte-balais |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10256831A1 (de) * | 2002-12-04 | 2004-06-24 | Siemens Ag | Trägerteil für Kommutatorbürsten eines Elektromotors |
US7141907B2 (en) * | 2004-06-05 | 2006-11-28 | Lg Electronics Inc. | Bracket assembly of universal motor |
DE102004041490A1 (de) * | 2004-08-27 | 2006-03-02 | Robert Bosch Gmbh | Schleifkörperhalter |
DE102007061745A1 (de) * | 2007-12-20 | 2009-06-25 | Robert Bosch Gmbh | Halteelement für einen Kommutatorschleifkontakt eines Elektromotors sowie Elektromotor |
FR2996369B1 (fr) * | 2012-09-28 | 2016-06-03 | Valeo Equip Electr Moteur | Cage a balai pour porte-balai de machine electrique et porte-balais correspondant |
FR2996368B1 (fr) * | 2012-09-28 | 2015-11-13 | Valeo Equip Electr Moteur | Balai de machine electrique et porte-balais correspondant |
-
2014
- 2014-12-12 FR FR1462293A patent/FR3030145B1/fr active Active
-
2015
- 2015-12-10 WO PCT/FR2015/053425 patent/WO2016092223A1/fr active Application Filing
- 2015-12-10 EP EP15818000.0A patent/EP3231046A1/fr not_active Withdrawn
- 2015-12-10 US US15/533,861 patent/US10700485B2/en not_active Expired - Fee Related
- 2015-12-10 CN CN201580067221.3A patent/CN107005011B/zh active Active
- 2015-12-10 JP JP2017531330A patent/JP2018503019A/ja active Pending
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2016092223A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN107005011B (zh) | 2020-10-23 |
US10700485B2 (en) | 2020-06-30 |
FR3030145B1 (fr) | 2016-12-09 |
CN107005011A (zh) | 2017-08-01 |
WO2016092223A1 (fr) | 2016-06-16 |
JP2018503019A (ja) | 2018-02-01 |
FR3030145A1 (fr) | 2016-06-17 |
US20170331242A1 (en) | 2017-11-16 |
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