EP1678732A1 - Dispositif de contacts d'un contacteur pour demarreur electrique - Google Patents
Dispositif de contacts d'un contacteur pour demarreur electriqueInfo
- Publication number
- EP1678732A1 EP1678732A1 EP04805344A EP04805344A EP1678732A1 EP 1678732 A1 EP1678732 A1 EP 1678732A1 EP 04805344 A EP04805344 A EP 04805344A EP 04805344 A EP04805344 A EP 04805344A EP 1678732 A1 EP1678732 A1 EP 1678732A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- wafer
- contactor according
- contactor
- recess
- 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.)
- Granted
Links
- 239000007858 starting material Substances 0.000 title claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000003032 molecular docking Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/02—Non-polarised relays
- H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
- H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
- H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
Definitions
- the invention relates to a contactor for an electric starter of a motor vehicle, comprising a contact device having:
- an electric starter contactor 10 of the type described in document FR 2714521 comprises an electromagnet with a movable core 12 actuated in translation against a fixed core 24, 26 during the excitation of a coil 20, 22 of tubular form.
- the contactor 10 is equipped with a movable contact 30 and two fixed contact elements 36A, 36B respectively connected with the battery, and the electric motor of the starter.
- the coil 20, 22 is housed in a sleeve 18, and the gap 32 between the two cores 12, 26, is axial.
- the movable contact 30 is constituted by a wafer in the form of bridge made by cutting.
- the two fixed contact elements 36A, 36B are arranged in an insulating cover 34 connected to the yoke 14, and are each provided with a convex contact head 40A, 40B mounted on a pad 38A, 38B.
- a control rod 28 is integral with the plate of the movable contact 30, and is actuated by the mobile core 12 during its attraction against the fixed core
- the plate of the movable contact 30 comprises a central orifice 42 for the passage of the control rod 28, and two oblong holes 44A, 44B whose edges come into contact with the convex contact head 40A, 40B shaped spherical cap.
- the parallel edges of the two holes 44A, 44B extend in perpendicular directions.
- Each hole 44A, 44B delimits with the curved contact head 40A, corresponding 40B, two point contact zones to avoid any risk of contact failure due to fouling resulting from the presence of particles of insulating material.
- the orientation of the holes 44A, 44B in two perpendicular directions allows a slight oscillation effect favoring the self-cleaning of the mechanical contact areas during the docking of the edge of the two holes 44A, 44B oblong on the convex contact head 40A, 40B.
- This perpendicular orientation of the holes 44A, 44B makes it possible, on the other hand, to compensate for the manufacturing tolerances of the various components of the contactor, so as to guarantee the presence of two points of mechanical and electrical contact on each of the curved contact heads 40A, 40B.
- the wafer 40A, 40B is stable.
- the wafer must nevertheless have a large size in the length direction, since the presence at the opposite ends of the oblong holes 44A, 44B requires a length greater than the spacing between the convex contact heads 40A, 40B.
- the contact surface of the two fixed contact elements 36A, 36B and the plate of the movable contact 30 is completely flat, and may possibly comprise streaks 37 which serve to ensure the clearance insulating particles or a possible layer of frost likely to be at the interface of the parts.
- the insulating particles are all the more difficult to evacuate as the contact surfaces are worn out and the streaks are faded.
- the electric arcs that occur during closure and opening of the movable contact accelerate the erosion of the contact surfaces, and also tend to deposit an insulating oxide layer thereon. Even when the contact is established, the occurrence of arcing remains possible due to possible micro-displacement of the wafer relative to the fixed contacts 36A, 36B, due for example to vibrations or shocks.
- the wafer-fixed contacts link 36A, 36B in the closed position has at least three degrees of freedom, namely displacements with respect to x and y and a rotation with respect to z . These two defects can cause an increase in the contact resistance, or even a total electrical insulation of the contact.
- the plate of the movable contact 30 comprises at each end an inclined surface 37A with respect to the direction of displacement z.
- the heads of the fixed contacts 36A, 36B also have an inclined surface opposite that of the wafer.
- Another disadvantage is the need to properly orient the fixed contacts 36A, 36B and the wafer assembly, under penalty of a very high quality defect (non-operation of the product or permanent short-circuit ).
- the reduced space does not always make it possible to provide effective keys on the parts.
- DE 4301056 discloses a contactor, in which the prismatic plate is replaced by a truncated cone centered on the Z axis of the direction of displacement.
- the fixed contacts have a complementary frustoconical shape, itself centered on the Z axis.
- the wafer can thus rotate about the Z axis, to distribute the wear of contact during successive operations of the contactor.
- this lack of immobilization may cause electric arcs detrimental to the performance and durability of the contactor.
- the object of the invention is to provide an electric contactor for a motor vehicle starter, to overcome the aforementioned drawbacks, and to ensure good mechanical and electrical resistance of the contactor, and to reduce the contact resistance over time .
- the plate of the movable contact comprises, at each of the two opposite ends, a recess with a reentrant profile engaging with a portion of the contact head to create a suitable contact zone.
- the contact zone may consist of a contact line, or a succession of contact points, to improve the mechanical and electrical resistance, with a reduction in time of the contact resistance.
- each recess of the wafer of the movable contact has a curvilinear profile and concave, especially in a circular arc.
- the contact head of the fixed contacts has a conical structure, the angle formed by the cone and the wafer at a predetermined contact point having a slope of between 5 ° and 80 °, and preferably between 30 ° and 60 °.
- the shape of the contacts favors the mechanical cleaning of the surfaces during the docking which is done without vibrations with a tangential component.
- the wafer Once in contact with the contact heads, the wafer is immobilized in translation and rotation in all directions x, y and z, which reduces the occurrence of arcing by relative movement of the parts in contact. This results in an increase in the duration of the contactor, and a contact resistance limited in time.
- each recess of the wafer of the movable contact has a profile cut along a broken line, in particular V-shaped.
- the contact head of the fixed contacts may have a curved structure, in particular spherical, or a multi-faceted inclined structure.
- each recess opens at the two opposite planar faces of the wafer by chamfers, each extending over a distance less than half the thickness of the wafer.
- chamfers each extending over a distance less than half the thickness of the wafer.
- FIG. 1 is a sectional view of a starter contactor according to the prior art, the contacts being shown in the closed position;
- FIG. 2 shows an enlarged perspective view of the contact device of FIG. 1;
- FIGS. 3 and 4 show identical views of FIG. 2 of two other contact devices according to the prior art;
- FIG. 5 is a schematic perspective view of a contact device according to the invention;
- FIG. 6 shows a partial view of the device of FIG. 5 with the location of the point of contact of the wafer with a fixed contact;
- - Figure 6A shows a view in the plane P of the contact area;
- FIGS. 7 to 9 illustrate alternative embodiments of FIG.
- the conductive plate of the movable contact 30 of the contactor is shaped according to a bridge having at each of its opposite ends, a recess 50 having a curvilinear profile, especially in a circular arc.
- Each fixed contact 36A, 36B comprises a base 51 in the form of a substantially rectangular pad, said base being surmounted by a conical contact head 52, intended to cooperate with the corresponding recess 50 when closing the contactor.
- the two recesses 50 of the wafer have identical profiles, and are symmetrical with respect to the median axis coinciding with the z axis of displacement of wafer 30.
- the engagement of the contact head 52 with the conductive plate of the movable contact 30 takes place along a line of contact in a circular arc.
- the edge of the plate of the movable contact 30 is preferably provided with a striking chamfer 53 on the two opposite faces.
- the presence of the lower chamfer makes it possible to increase the exchange surface along the line of contact in an arc of a circle, so as to reduce heating that may occur when the current passes.
- the upper chamfer is preferably identical to the lower chamfer, but does not come into engagement with the contact head 52. The symmetry of the wafer thus makes it possible to overcome the orientation of the wafer at the time of assembly of the contactor.
- the angle A formed by the cone of the contact head 52 and the wafer promotes the tangential docking effect when the contactor closes.
- the rectangular shape of the base 51 makes it possible to cash the torque of screwing the nuts on the connection terminals of the fixed contacts 36A, 36B.
- the curvilinear profile of the recess 50 can of course have another concave shape, preferably having a shape complementary to the contact head 52.
- the enveloping shape of the two recesses 50 allows the angular immobilization of the wafer on the contact heads 52.
- the plane P passing through the vertical center Z axis of the fixed contact 36B, and any point PC of the nip is considered.
- the axis W is at the intersection of the plane P and a plane parallel to XY passing through the point of contact PC.
- the angle A formed by the cone of the contact head 52 in the plane P has a slope that can be between 5 ° and 80 °, and preferably between 30 ° and 60 °, depending on the structure of the fixed contact 36B.
- the chamfer 53 does not exceed half the thickness of the plate of the movable contact 30, and the angle of this chamfer 53 is close to that of the angle A of the cone of the contact head 52. optimum heat exchange surface along the nip when the contactor is in the closed position.
- the shape of the contacts favors the mechanical cleaning of the surfaces during the docking which is done without vibrations with a tangential component.
- the wafer 30 is immobilized in translation and rotation in all directions x, y and z, which reduces the occurrence of arcing by a relative movement of the parts in contact.
- Figures 7-9 show different embodiments of the geometry of the fixed contacts and the ends of the wafer.
- the contact heads 52 of the fixed contacts 36A, 36B have curved or spherical tops, and not planar surface tops as in FIG. 6.
- the plate of the movable contact 30 comprises recesses 50 concave arcuate.
- the mechanical and electrical resistance of the contactor is similar to that obtained with the contact heads 52 of FIG. 6.
- the contact zone makes it possible to ensure the angular immobilization of said wafer in the closed position.
- the contact heads 52 of the fixed contacts 36A, 36B are conical like those of FIG. 5, but the recesses 50 instead of being circular arcs, are cut along a V with a recessed dihedral profile.
- the vertices of the two V-shaped recesses are directed toward each other, and aligned in a direction passing through the longitudinal median plane of symmetry of the wafer 30.
- the two edges of the dihedron of each recess 50 come into engagement with the head contact 52 at two points of contact disposed on either side of the longitudinal median plane of symmetry.
- the size of the wafer in the longitudinal direction is substantially identical to that of Figure 6 or 7.
- the mechanical and electrical resistance of the contactor is also retained.
- the contact zone makes it possible to ensure the angular immobilization of said wafer in the closed position.
- the plate of the movable contact 30 is identical to that of FIG. 8, but the contact heads 52 of the fixed contacts 36A, 36B are provided with a plurality of plane facets, instead of being conical.
- the zone of contact with the recesses 50 in V is carried out according to points or lines according to the degree of inclination of the facets with respect to the edges of the dihedral of each recess 50.
- the mechanical and electrical resistance of the contactor is also preserved in this execution variant.
- the contact zone makes it possible to ensure the angular immobilization of said wafer in the closed position.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Contacts (AREA)
- Mechanisms For Operating Contacts (AREA)
- Testing Or Measuring Of Semiconductors Or The Like (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL04805344T PL1678732T3 (pl) | 2003-10-31 | 2004-10-29 | Urządzenie stykowe stycznika dla rozrusznika elektrycznego |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0312778A FR2861891B1 (fr) | 2003-10-31 | 2003-10-31 | Dispositif de contacts d'un contacteur pour demarreur electrique |
| PCT/FR2004/002790 WO2005043571A1 (fr) | 2003-10-31 | 2004-10-29 | Dispositif de contacts d’un contacteur pour demarreur electrique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1678732A1 true EP1678732A1 (fr) | 2006-07-12 |
| EP1678732B1 EP1678732B1 (fr) | 2007-03-14 |
Family
ID=34429784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04805344A Expired - Lifetime EP1678732B1 (fr) | 2003-10-31 | 2004-10-29 | Dispositif de contacts d'un contacteur pour demarreur electrique |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1678732B1 (fr) |
| AT (1) | ATE357051T1 (fr) |
| DE (1) | DE602004005357T2 (fr) |
| FR (1) | FR2861891B1 (fr) |
| PL (1) | PL1678732T3 (fr) |
| WO (1) | WO2005043571A1 (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008043186A1 (de) * | 2008-10-27 | 2010-04-29 | Robert Bosch Gmbh | Elektromagnetischer Schalter für eine Startvorrichtung sowie Verfahren zum Schalten des elektromagnetischen Schalters |
| DE102010027823A1 (de) * | 2010-04-15 | 2011-10-20 | Robert Bosch Gmbh | Startvorrichtung mit einem elektromagnetischen Schalter sowie Verfahren zum Schalten des elektromagnetischen Schalters |
| DE102010041721A1 (de) * | 2010-09-30 | 2012-04-05 | Robert Bosch Gmbh | Schweissverhinderer bei Hochstromschalter |
| DE102011008158A1 (de) * | 2011-01-10 | 2012-07-12 | Autoliv Development Ab | Hupenaktivierungseinrichtung |
| CN104112613B (zh) * | 2013-04-18 | 2016-12-28 | 比亚迪股份有限公司 | 一种驻车指示灯的开关 |
| FR3016472B1 (fr) * | 2014-01-13 | 2016-02-05 | Schneider Electric Ind Sas | Dispositif de contact electrique et bloc de coupure unipolaire basse tension integrant un tel dispositif de contact electrique |
| DE102015224287B4 (de) * | 2015-12-04 | 2019-09-19 | Seg Automotive Germany Gmbh | Elektromagnetischer Schalter |
| US10699865B2 (en) | 2018-04-24 | 2020-06-30 | Te Connectivity Corporation | Electromechanical switch having a movable contact and stationary contacts |
| DE102019107160A1 (de) * | 2019-03-20 | 2020-10-08 | Seg Automotive Germany Gmbh | Elektromagnetisches Relais, insbesondere Starterrelais für eine Startvorrichtung |
| US11195680B2 (en) * | 2019-03-20 | 2021-12-07 | TE Connectivity Services Gmbh | Electrical assembly with contacts with modified mating surfaces |
| CN111489915B (zh) * | 2020-04-28 | 2022-11-08 | 国网安徽省电力有限公司池州市贵池区供电公司 | 一种真空开关 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3632469A1 (de) * | 1986-09-24 | 1988-03-31 | Bosch Gmbh Robert | Elektromagnetischer schalter, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen |
| FR2697370B1 (fr) * | 1992-10-26 | 1994-12-02 | Valeo Equip Electr Moteur | Contacteur pour démarreur de moteur à combustion interne de véhicules automobiles. |
| DE4301056A1 (de) * | 1993-01-16 | 1994-07-21 | Bosch Gmbh Robert | Elektromagnetischer Schalter, insbesondere Einrückrelais für den Starter einer Brennkraftmaschine |
| FR2714521B1 (fr) * | 1993-12-23 | 1996-02-09 | Valeo Equip Electr Moteur | Contacteur de démarreur de véhicule automobile. |
| DE19549179B4 (de) * | 1995-12-30 | 2005-10-27 | Robert Bosch Gmbh | Einrückrelais für eine Andrehvorrichtung |
-
2003
- 2003-10-31 FR FR0312778A patent/FR2861891B1/fr not_active Expired - Fee Related
-
2004
- 2004-10-29 DE DE602004005357T patent/DE602004005357T2/de not_active Expired - Lifetime
- 2004-10-29 PL PL04805344T patent/PL1678732T3/pl unknown
- 2004-10-29 AT AT04805344T patent/ATE357051T1/de not_active IP Right Cessation
- 2004-10-29 WO PCT/FR2004/002790 patent/WO2005043571A1/fr not_active Ceased
- 2004-10-29 EP EP04805344A patent/EP1678732B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2005043571A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2861891B1 (fr) | 2006-01-27 |
| FR2861891A1 (fr) | 2005-05-06 |
| ATE357051T1 (de) | 2007-04-15 |
| DE602004005357D1 (de) | 2007-04-26 |
| PL1678732T3 (pl) | 2007-08-31 |
| EP1678732B1 (fr) | 2007-03-14 |
| DE602004005357T2 (de) | 2007-07-12 |
| WO2005043571A1 (fr) | 2005-05-12 |
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