EP0316363B1 - Elektromagnetischer schalter, insbesondere für andrehvorrichtungen von brennkraftmaschinen - Google Patents
Elektromagnetischer schalter, insbesondere für andrehvorrichtungen von brennkraftmaschinen Download PDFInfo
- Publication number
- EP0316363B1 EP0316363B1 EP87905602A EP87905602A EP0316363B1 EP 0316363 B1 EP0316363 B1 EP 0316363B1 EP 87905602 A EP87905602 A EP 87905602A EP 87905602 A EP87905602 A EP 87905602A EP 0316363 B1 EP0316363 B1 EP 0316363B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- current contacts
- primary current
- switch
- section
- 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.)
- Expired - Lifetime
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Images
Classifications
-
- 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
- H01H1/2083—Bridging contact surfaces directed at an oblique angle with respect to the movement of the bridge
-
- 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
Definitions
- the invention is based on an electromagnetic switch according to the preamble of the main claim. It is already known in such a switch to provide the main current contacts with inclined flat contact surfaces and the contact bridge with correspondingly bent ends as contact sections. When the contacts are closed, the contact bridge and main current contacts should then lie against one another over a relatively large area.
- a disadvantage of this arrangement is that the contact bridge, which is rectangular in plan view, requires an anti-rotation device, since otherwise no parallel contact is possible.
- Such an anti-rotation device is known, for example, in the form of ribs or walls in the cap carrying the main current contacts, which surrounds the switch room.
- the invention has for its object to provide an electromagnetic switch, especially for starting devices for internal combustion engines, the main current contacts and contact bridge are designed such that the disadvantages of the known solutions are avoided and thereby the life of the contact parts with increased demands on their performance and a greater security against welding of the contact parts can be achieved.
- the object is achieved by the subject matter of claim 1.
- the advantage here is that with higher contact force, reduced bounce and good self-cleaning effect due to the shape of the Contact surfaces is made possible in an economical manner, even in the event of dimensional deviations, to always make contact at almost the same point on the contact surfaces, thereby ensuring reliable contact and good heat dissipation without contact welding.
- Another advantage is that the round contact bridge no longer requires lateral guidance, which also contributes to increasing the service life of the switch.
- the measures listed in the subclaims allow advantageous developments of the electromagnetic switch specified in the main claim. It is particularly advantageous that the main current contacts are designed as screws with a polygonal head, so that no security against rotation is required, since they can be fixed in their position in the cap in a simple manner. In addition, the lifespan of the main power contacts is increased by multiple use of the main power contacts due to the large number of molded contact surfaces. With an angle of inclination of the contact surfaces to the direction of the switching movement of 45 °, the most favorable ratio between contact force, tendency to bounce and self-cleaning is made possible.
- the main current contacts can be used economically not only from expensive copper but also from steel with a contact section made of copper.
- manufacturing tolerances can be compensated for by the spherical segment-shaped contact surface of the contact bridge in such a way that the contact bridge always lies almost at the same point on the contact surface of the main current contacts.
- the also spherical section-shaped back of the contact bridge and the somewhat conical shape of the bearing point between the contact bridge and the contact bridge support can even compensate for dimensional deviations.
- FIG. 1 shows an electromagnetic switch in longitudinal section
- FIG. 2 shows a section through the switch along the line II-II in FIG. 1
- FIG. 3 shows the switch in partial section with a modified contact bridge
- FIG. 4 shows a second exemplary embodiment of a main current contact in side view
- FIG. 5 the contact section of the main current contact according to Figure 4 in supervision
- Figure 6 shows a third embodiment of the main current contact in side view and Figure 7 in supervision.
- An electromagnetic switch has a cup-shaped housing 1, which also serves as a yoke.
- a magnetic core 2 rests on its end face.
- a brass sleeve 3 On one shoulder of the magnetic core 2 sits one end of a brass sleeve 3, the other end of which is inserted into a bore in the bottom of the housing 1.
- a winding support 4 On the brass sleeve 3, a winding support 4 is arranged, on which an excitation winding, which is formed from a pull-in winding 5 and a holding winding 6, is accommodated.
- a spring 7 is inserted which holds the winding carrier 4 in its position in the housing 1 in a tolerance-compensating and vibration-resistant manner.
- the outer end face of the magnetic core 2 delimits a switching space 8 which is enclosed by a cap 9.
- the cap 9 has a flange 10 on its edge facing the magnetic core 2.
- a spring element 11 is inserted between the magnetic core 2 and the edge of the cap.
- a fastening edge 12 of the housing 1 engages over the magnetic core 2, the spring element 11 and the flange 10 and is flanged behind the flange 10.
- two main current contacts 13 and 14 designed as screws are inserted, which protrude with their heads 15 into the switching space 8 and have connecting bolts with a thread leading out of the cap 9, which are connected to the positive pole in a manner known per se and not shown in detail Battery or are connected to the field winding of a starter motor.
- the main current contacts 13 and 14 have a hexagonal head 15 with a 45 ° inclined contact section 16.
- the contact section 16 is also hexagonal and has six trapezoidal contact surfaces 17 when projected onto a plane perpendicular to the switching movement. However, the contact surfaces 17 are rounded such that they are shaped as jacket sections of cylinders or truncated cones.
- the head of the main current contacts 13 and 14 is rotatably arranged in recesses 18 or between ribs 19 of the inner wall of the cap 9.
- the main current contacts 13 and 14 are detachably fastened in the cap 9 by an assigned nut 20, which is screwed onto the connecting bolt on the outside.
- the main current contacts 13 and 14 are inserted into the cap 9 in such a way that two contact surfaces 17 lie opposite one another and enclose an angle of 90 °.
- a magnetic armature 21 is guided in the brass sleeve 3 so as to be resistant to shaking.
- a driver 22 made of plastic is fastened with a screw 23 for an engagement lever, not shown, of a single-track transmission.
- the magnet armature 21 has a longitudinal bore 24, the screw 23 is screwed into one end section of smaller diameter and the other end section 25 is widened in a funnel shape.
- a switching pin 26 made of non-magnetic material projects through a bore 27 in the magnetic core 2 and extends with an end designed as a collar 28 into the bore 24 of the magnet armature 21.
- the guide sleeve 29 serves as a guide for the switching pin 26 in the longitudinal bore 24 and carries a return spring 30, which brings both the magnet armature 21 and the contact bridge 33 into the starting position. It is supported at one end on the collar 29 and abuts the magnetic core 2 at the other end.
- the switching pin 26 protrudes into the switching space 8 with an end section.
- a contact pressure spring 31, a contact bridge support 32 made of insulating material, which carries a contact bridge 33 rotatably arranged on the contact bridge support 32, an insulating disk 34 and a stop disk 35 are arranged on the end section and with a on the end portion screwed nut 36 releasably attached.
- the contact bridge carrier 32 In the rest position of the switch, the contact bridge carrier 32 is seated in an enlarged end section 37 of the bore 27 of the magnetic core 2.
- the contact pressure spring 31 is supported at one end in the contact bridge carrier 32 and bears against the end face 38 of the guide sleeve 29 at the other end.
- the spring arrangement 30, 31 holds the assembly of switching bolts 26, 28 together with the guide sleeve 29, 38, contact bridge 32 with contact bridge 33 and the magnet armature 21 in the rest position shown in FIG. 1 due to the pretension of the return spring 30.
- the contact bridge 33 is round and has the shape of a flattened spherical cap, the center of which lies on the longitudinal axis 40 of the switch.
- the radius of the contact surface 39 is smaller than the radius of the rounded contact surfaces 17 of the main current contacts 13 and 14.
- the magnet armature 21 When the winding 5, 6 is energized, the magnet armature 21 is used to engage the starting pinion (not shown) of the aforementioned single-track transmission the engaging lever, also not shown, articulated on the driver 22 of the magnet armature 21 against the force of the return spring 30, which is further tensioned, pulled onto the magnet core 2.
- the switching pin 26 together with the guide sleeve 29 and the contact bridge carrier 32 arranged on it are moved with the contact bridge 33 by the magnet armature 21. During this movement, the switching pin 26 is pushed further into the switching space 8, so that the contact bridge 33 is pressed with its contact surface 39 onto the associated contact surfaces 17 of the main current contacts 13 and 14 and is held on the main current contacts 13 and 14 with the aid of the force of the contact pressure spring 31 .
- the starter motor not shown, connected to the connecting bolt of the main current contact 13 is connected to the current source, also not shown, connected to the connecting bolt of the main current contact 14 in a manner known per se.
- the starter motor receives power to start the internal combustion engine.
- the power supply to the field winding 5, 6 of the electromagnetic switch is switched off.
- the return spring 30, which is provided with much greater spring force than the contact pressure spring 31, holds the switching bolt 26 with its collar 28 pressed against the magnet armature 21 which is moved back into its rest position. During this movement, the switching pin 26 takes the contact bridge 33 with it and separates it from the main current contacts 13 and 14, so that the movable switching parts 21 to 39 again assume their rest or starting position shown in FIG.
- the contact surface 39 of the round contact bridge 33 which is provided with the shape of a spherical cap section, and the rounded contact surfaces 17 of the main current contacts 13 and 14 are designed such that, when new, the contact contact in the first third of the main current contacts 13 and 14 facing contact surface 39 of the contact bridge 33. Good heat dissipation from the contact points is achieved. No rotation lock is required for the round contact bridge 33. Shaking influences can cause the contact bridge 33 on the contact bridge support 32 to be rotated about the longitudinal axis 40 of the switch. As a result, other essentially punctiform points of the contact surface 39 come into contact with the contact surfaces 17 of the main current contacts 13 and 14 but never the edges. The main current contacts 13 and 14 can be used several times.
- the main current contacts 13 and 14 are rotated so far about their longitudinal axis into the recess 18 and / or between the ribs 19 of the cap 9 that the contact surface of the contact bridge 33 can rest on another contact surface 17 .
- the bouncing effect is reduced by the contact surfaces 17 and 39 arranged inclined to the switching direction. In addition, this increases the contact force and the self-cleaning effect of the contact surfaces. The lifespan and performance of the electromagnetic switch are thus increased.
- the electromagnetic switch shown in Figure 3 has a modified contact bridge 41. As far as the other parts are the same as those of the embodiment of Figures 1 and 2, they have the same reference numerals.
- the contact bridge support 42 has a bearing shoulder 43 which tapers somewhat towards its free end and on which the contact bridge 41 is rotatably mounted.
- the rear side 44 of the contact bridge 41 is also designed as a flattened spherical cap with a radius of curvature that is substantially greater than that of the contact surface 39.
- the contact bridge 41 can thus somewhat compensate for dimensional deviations which are inclined against the longitudinal axis 40 of the switch, for example as a result of manufacturing tolerances. As a result, the contact surfaces of the contact surfaces 39 and 17 of the contact bridge 41 or of the main current contacts 13 and 14 are always in the desired location.
- the bearing bore 45 of the contact bridge 41 can also be somewhat conical in the case of a cylindrical bearing shoulder 43.
- the first exemplary embodiment of the main current contacts 13 and 14 according to FIGS. 1 to 3 has contact surfaces 17 which are formed as fillets in the form of conical jacket sections or cylindrical jacket sections which extend over the entire trapezoidal surfaces of the contact section.
- FIGS. 4 and 5 show a second exemplary embodiment for main current contacts.
- a main current contact 46 in turn has a hexagonal head 47 which is provided with a contact section 48 which is inclined at 45 ° to the longitudinal axis and thus to the switching direction.
- the six trapezoidal partial surfaces of the contact section 48 are each provided with a cylindrical jacket-shaped fillet as contact surfaces 49, which extends over the central part of the trapezoidal partial surfaces.
- the main current contact 46 made of an electrically highly conductive material such as copper, a modification for the material used is indicated in dash-dotted lines in FIGS. 4 and 5.
- the main current contact 46 is formed with connecting bolts and head 47, for example made of steel.
- At the front of the head 47 is a Bearing approach 50 molded.
- the contact section 48 is formed from copper and is provided with the cylinder jacket section-shaped contact surfaces 49 and with a longitudinal bore 51. The contact section 48 is pushed onto the bearing projection 50. With the end 52 of the bearing projection 50 protruding from the longitudinal bore 51, the contact section 48 is riveted to the main current contact 46.
- the corresponding, correspondingly large main current contacts can be produced economically, which is particularly necessary for large-scale production.
- a contact section as shown in a third exemplary embodiment of a main current contact 53 according to FIGS. 6 and 7 is suitable.
- the head 54 of the main current contact 53 is again designed as a hexagon.
- the contact section 55 is only inclined on two sides with respect to the switching direction. These sides are rounded out as contact surfaces 56.
- the wear on the main current contacts 57 is lower with the particularly favorable heat dissipation from the contact contact point. Therefore, two contact surfaces 56 per main current contact 53 are sufficient for the service life of the switching device. The higher copper requirement and thus the higher price therefore justify the use of this embodiment example for special designs of electromagnetic switches.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Contacts (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3632469 | 1986-09-24 | ||
DE19863632469 DE3632469A1 (de) | 1986-09-24 | 1986-09-24 | Elektromagnetischer schalter, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0316363A1 EP0316363A1 (de) | 1989-05-24 |
EP0316363B1 true EP0316363B1 (de) | 1992-07-29 |
Family
ID=6310260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87905602A Expired - Lifetime EP0316363B1 (de) | 1986-09-24 | 1987-09-04 | Elektromagnetischer schalter, insbesondere für andrehvorrichtungen von brennkraftmaschinen |
Country Status (9)
Country | Link |
---|---|
US (1) | US4987396A (da) |
EP (1) | EP0316363B1 (da) |
JP (1) | JP2541598B2 (da) |
AU (1) | AU594505B2 (da) |
BR (1) | BR8707827A (da) |
DE (2) | DE3632469A1 (da) |
ES (1) | ES2005017A6 (da) |
IN (1) | IN169160B (da) |
WO (1) | WO1988002543A1 (da) |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537598A1 (de) * | 1985-10-23 | 1987-05-27 | Bosch Gmbh Robert | Elektromagnetischer schalter, insbesondere fuer andrehvorrichtungen von brennkraftmaschinen |
DE3817744C1 (da) * | 1988-05-25 | 1989-11-23 | Hoffmann & Co. Elektrokohle Kg, Steeg, At | |
JP2646292B2 (ja) * | 1991-03-28 | 1997-08-27 | キロヴァック、コーパレイシャン | 直流真空リレー装置 |
DE4117242C1 (da) * | 1991-05-27 | 1992-07-16 | Robert Bosch Gmbh, 7000 Stuttgart, De | |
JP3324145B2 (ja) * | 1992-07-31 | 2002-09-17 | 株式会社デンソー | マグネットスイッチ |
DE4242930C2 (de) * | 1992-12-18 | 1998-07-09 | Bosch Gmbh Robert | Einrückrelais für Andrehvorrichtungen |
DE4301056A1 (de) * | 1993-01-16 | 1994-07-21 | Bosch Gmbh Robert | Elektromagnetischer Schalter, insbesondere Einrückrelais für den Starter einer Brennkraftmaschine |
DE4432297C2 (de) * | 1994-09-10 | 2002-06-27 | Bosch Gmbh Robert | Einrückrelais für Andrehvorrichtung von Brennkraftmaschinen |
FR2731296B1 (fr) * | 1995-03-02 | 1997-06-06 | Valeo Equip Electr Moteur | Contacteur de demarreur de vehicule automobile comportant des moyens perfectionnes d'etancheite et demarreur equipe d'un tel contacteur |
US5563563A (en) * | 1995-12-04 | 1996-10-08 | Ford Motor Company | Solenoid with an improved contact design and a system utilizing the solenoid |
JP2000322999A (ja) * | 1999-05-12 | 2000-11-24 | Mitsubishi Electric Corp | スタータ用マグネットスイッチ |
JP2002138931A (ja) * | 2000-11-06 | 2002-05-17 | Denso Corp | エンジン始動装置 |
JP2004076650A (ja) * | 2002-08-19 | 2004-03-11 | Denso Corp | スタータ用電磁スイッチ |
FR2861891B1 (fr) * | 2003-10-31 | 2006-01-27 | Valeo Equip Electr Moteur | Dispositif de contacts d'un contacteur pour demarreur electrique |
DE102007036317A1 (de) * | 2007-07-31 | 2009-02-05 | Robert Bosch Gmbh | Anordnung mit zumindest einem ortsfest gehalterten elektrischen Leiter |
DE102007053417A1 (de) * | 2007-11-09 | 2009-05-14 | Robert Bosch Gmbh | Elektromagnetischer Schalter für E-Maschine |
JP4772098B2 (ja) * | 2008-10-23 | 2011-09-14 | 三菱電機株式会社 | スタータ用電磁スイッチ |
DE102008043186A1 (de) | 2008-10-27 | 2010-04-29 | Robert Bosch Gmbh | Elektromagnetischer Schalter für eine Startvorrichtung sowie Verfahren zum Schalten des elektromagnetischen Schalters |
DE102009027844A1 (de) * | 2009-07-20 | 2011-01-27 | Robert Bosch Gmbh | Schaltrelais mit Kontaktaufreißeinrichtung |
JP5573250B2 (ja) * | 2010-03-09 | 2014-08-20 | オムロン株式会社 | 封止接点装置 |
DE102011119306A1 (de) * | 2011-11-24 | 2013-05-29 | Daimler Ag | Kontaktpaarung mit einer Doppelkontaktstelle für ein elektrisches Schaltgerät |
WO2019154855A1 (de) * | 2018-02-07 | 2019-08-15 | Tdk Electronics Ag | Schaltvorrichtung zum schalten einer elektrischen last |
EP3617494A1 (en) * | 2018-08-28 | 2020-03-04 | Mahle International GmbH | Electromagnetic switch for a starting device |
CN110349812A (zh) * | 2019-07-18 | 2019-10-18 | 中电科仪器仪表有限公司 | 一种继电器系统及常开型单刀四掷射频同轴开关 |
CN110890252A (zh) * | 2019-11-29 | 2020-03-17 | 宁波铭富汽车零部件有限公司 | 一种回旋除焊点的电磁开关 |
DE102020209161B3 (de) | 2020-07-21 | 2021-11-18 | Vitesco Technologies Germany Gmbh | Leistungsschalter zur Anordnung in einer Schaltsicherungsbox und Schaltsicherungsbox für ein Kraftfahrzeug |
JP2023054942A (ja) * | 2021-10-05 | 2023-04-17 | オムロン株式会社 | 電磁継電器 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1003318B (de) * | 1955-04-23 | 1957-02-28 | Maecker Elan Schaltelemente | Schubschalter |
US3569649A (en) * | 1969-01-31 | 1971-03-09 | Collins Radio Co | Electrical switch contact structure with improved inflatable bladder actuating means |
DE2315567A1 (de) * | 1973-03-28 | 1974-10-17 | Huetoegepgyar | Kontakt- und betaetigungsvorrichtung fuer elektrische schalter vornehmlich fuer motoranlassrelais |
AU8686075A (en) * | 1974-11-25 | 1977-05-26 | Mcmurdo Australia Pty Ltd | Electric switches |
JPS53156056U (da) * | 1977-05-13 | 1978-12-07 | ||
DE2804815C2 (de) * | 1978-02-04 | 1986-09-04 | Robert Bosch Gmbh, 7000 Stuttgart | Elektromagnetischer Schalter, insbesondere für Andrehvorrichtungen von Brennkraftmaschinen |
EP0017076B1 (de) * | 1979-03-30 | 1983-05-11 | Siemens Aktiengesellschaft | Kontaktanordnung für Vacuumschalter und Verfahren zu ihrer Herstellung |
US4293835A (en) * | 1980-01-28 | 1981-10-06 | Roper Corporation | Solenoid for an electric starting motor for garden tractor or the like |
-
1986
- 1986-09-24 DE DE19863632469 patent/DE3632469A1/de not_active Withdrawn
-
1987
- 1987-07-29 IN IN544/MAS/87A patent/IN169160B/en unknown
- 1987-09-04 AU AU78726/87A patent/AU594505B2/en not_active Expired
- 1987-09-04 BR BR8707827A patent/BR8707827A/pt not_active IP Right Cessation
- 1987-09-04 DE DE8787905602T patent/DE3780822D1/de not_active Expired - Lifetime
- 1987-09-04 WO PCT/DE1987/000406 patent/WO1988002543A1/de active IP Right Grant
- 1987-09-04 JP JP62505131A patent/JP2541598B2/ja not_active Expired - Lifetime
- 1987-09-04 US US07/335,789 patent/US4987396A/en not_active Expired - Lifetime
- 1987-09-04 EP EP87905602A patent/EP0316363B1/de not_active Expired - Lifetime
- 1987-09-23 ES ES8702723A patent/ES2005017A6/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JP2541598B2 (ja) | 1996-10-09 |
AU7872687A (en) | 1988-04-21 |
AU594505B2 (en) | 1990-03-08 |
ES2005017A6 (es) | 1989-02-16 |
EP0316363A1 (de) | 1989-05-24 |
DE3780822D1 (de) | 1992-09-03 |
IN169160B (da) | 1991-09-07 |
US4987396A (en) | 1991-01-22 |
WO1988002543A1 (en) | 1988-04-07 |
BR8707827A (pt) | 1989-10-03 |
DE3632469A1 (de) | 1988-03-31 |
JPH02500066A (ja) | 1990-01-11 |
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