EP2342726A2 - Electromagnetic switch for a starting device, and method for switching the electromagnetic switch - Google Patents
Electromagnetic switch for a starting device, and method for switching the electromagnetic switchInfo
- Publication number
- EP2342726A2 EP2342726A2 EP09744383A EP09744383A EP2342726A2 EP 2342726 A2 EP2342726 A2 EP 2342726A2 EP 09744383 A EP09744383 A EP 09744383A EP 09744383 A EP09744383 A EP 09744383A EP 2342726 A2 EP2342726 A2 EP 2342726A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- bridge
- contact bridge
- electromagnetic switch
- edge
- 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
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000010949 copper Substances 0.000 claims description 8
- 238000007790 scraping Methods 0.000 claims description 7
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 229910001020 Au alloy Inorganic materials 0.000 claims description 3
- 229910001369 Brass Inorganic materials 0.000 claims description 3
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 229910001128 Sn alloy Inorganic materials 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000010951 brass Substances 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000011135 tin Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000007858 starting material Substances 0.000 description 14
- 238000004804 winding Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- 229910000971 Silver steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007542 hardness measurement Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
-
- 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
- H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
-
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
Definitions
- Electromagnetic switch for a starting device and method for switching the electromagnetic switch
- the invention relates to an electromagnetic switch for a starting device and a method for operating the electromagnetic switch.
- an electromagnetic switch (engagement relay) for a starting device is known.
- This switch has two contacts, which are referred to there as contact pins. Both contacts are electrically conductively connected to each other by a movable contact bridge in order to forward current from the contact pin which is connected to a positive pole of a starter battery to a contact pin and thereby to conduct electrical potential to a starter motor, which is not shown there.
- a further relay for starting devices is known. This relay has a so-calledsfedernde contact bridge, in which after the contact between the contact bridge and the mating contacts by the elasticity of the contact bridge, a transverse force between the contact bridge or the surface and the mating contacts arises.
- the proposed solutions seek to create a scraping motion between the two contact surfaces between the contact surfaces of the contacts and the surface of the contact bridge, thereby removing soils and other by the switching movement.
- All initially four alternatives have in common that the electromagnetic switch has two contacts, which are electrically conductively connected to each other by a movable contact bridge. Furthermore, this is common to the fact that the at least one contact has a contact surface. With the first alternative it is provided that the contact surface is at least substantially planar and an electrical
- Contact between the contact bridge and the contact-giving edge of the contact bridge is arranged so that, starting from the contact surface, it essentially allows line contact between contact and contact bridge. This has the advantage that compared to the previously known solutions, a relatively high surface pressure between the two contact-giving elements can be achieved. This is a prerequisite for a high-quality cleaning effect between the contact surfaces and for a possible good scraping action between contact bridge and contact surface.
- the contact surface of the contact has elevations whose highest areas lie substantially in one plane.
- An electrical contact between the contact bridge and contact edge of the contact bridge is arranged so that, starting from the impact on the contact surface, it essentially enables at least one point contact between the contact and the contact bridge.
- Substantially "line contact” and essentially “point contact” means that the contact pads between contact bridge and contact are very narrow and relatively long in a substantially line contact.
- a point contact means that the current passage area between contact bridge and contact reduces to at least one - possibly several - very small area, which is almost one point.
- a contact surface of the contact bridge and an axis of a contact pin between them include an angle directed to a central axis of the switch, which is greater than 90 °. This definition applies z. B. for the rest position of the electromagnetic switch.
- a fourth alternative describes that a contact face of the contact bridge and an axis of the contact pin between them are directed radially outward with respect to a central axis of the switch
- the axis can be considered, around which, for example, a retraction or a holding winding of the electromagnetic switch is wound.
- This axis is usually synonymous with the central axis of a magnetic core of the electromagnetic switch.
- the alternatives mentioned in claim 1 it is possible to reduce the bouncing of the contact bridge when hitting the contacts to be connected, since the friction between the contact partners is generated during the contacting. This leads to a reduction in the arc tendency and thus to reduce the surface temperatures of contact and contact bridge. As a result, the wear of the contact bridge and the contact is reduced because less erosion occurs.
- the alternatives mentioned allow an additional transverse force on the respective connection, so that in the end the opening force or the force acting in this connection is increased.
- the friction between the contact partners, contact bridge and contact destroys non-conductive layers on the surfaces, so that in the sequence of clean contacts arise because any oxide layers and / or ice sheets are broken.
- the mass of the contact bridge can be reduced, so that sets a lower bounce in the sequence. Further advantages emerge from the subclaims.
- the contact surface of the contacts has a corrugation, which is preferably a straight corrugation or an annular corrugation.
- the angle between 91 ° and 105 °, preferably by 95 °.
- the angle is between 91 ° and 120 °.
- the edge of the contact bridge is provided that the edge is arcuate or straight. Particularly insensitive to tolerances is the arcuate edge. As a result, tilting in particularly material-saving designs practically does not occur.
- the contact bridge is guided by a bolt in a bearing and the contact bridge between the pin and the edge of an area with the largest cross section and between the region with the largest cross section and the bolt has a reduced cross-section area. This increases the flexural elasticity.
- the contact bridge consists of a perpendicular to the bolt oriented central flat portion, followed by the bolt pioneering at least one outer areal section. There is an angle between the central and outer sections that is not equal to 90 °.
- at least one of the two contacts has a hardness which is less than a hardness of the contact bridge.
- a friction coefficient between the contact bridge and the at least one contact has a value between 0.1 and 2, preferably between 0.6 and 1.
- the edge has a radius of less than 0.3mm.
- the contact bridge is a metal sheet, which preferably has a plate thickness of between 1 and 4 mm.
- the contact surface of the contact bridge contacts one edge of the contact.
- the contact bridge has several edges that contact the contact.
- it consists of several layers. Preferably, one is
- Carrier layer provided and attached to the carrier layer contact layer.
- the support layer should preferably consist of a copper or silver alloy or steel or bronze or brass, while the contact layer of copper, tin, gold or silver alloy or a metal-metal oxide composite material exist.
- the switch is particularly advantageous in that it can be used to reduce switching problems, especially in high current applications such as starters.
- the contact bridge slides with its surface in the form of an edge over the contact surface of the contact or the contact surface of the contact with its surface in the form of an edge slides over the contact bridge.
- a cohesive connection between the contact bridge and a contact it is provided that a sufficiently large thrust load in the cohesive connection dissolves them.
- a method is provided with which the electromagnetic switch is switched.
- a scraping movement acts between the contact bridge and the contact surface of the contact. scraping means that a sliding movement (friction movement) acts between the contact bridge and the contact surface of the contact.
- FIG. 2 shows a longitudinal section through the electromagnetic switch according to a first exemplary embodiment
- FIG. 3 shows a side view of a contact bridge
- FIG. 5 shows three different cross sections of the contact bridge according to the first embodiment of FIGS. 3 and 4, FIG.
- FIG. 6 shows a plan view of the contact of a bolt
- FIG. 7 is a sectional view of a contact of a bolt according to FIG. 6,
- FIG. 8 shows a side view of a contact pin 151 and a contact bridge according to a second exemplary embodiment
- FIG. 9 shows a second side view of the second embodiment according to FIG.
- FIG. 10 is a side view of a third embodiment
- FIG. 11 shows a fourth exemplary embodiment of a switch with a different position of the contact bridge
- FIG. 12 shows in principle a fifth exemplary embodiment as a modification of FIG
- Figure 13 shows a sixth embodiment of a pairing of
- Figure 15 shows an eighth embodiment of a pairing of a
- FIG. 16 and Figure 17 each show an alternative embodiment of a contact bridge
- FIG. 18 and FIG. 19 show two further alternatives for contact bridges
- FIG. 20 shows a sectional representation of a contact bridge shown here in principle
- FIG. 21 shows a side view or sectional view of a further particularly advantageous combination of contact bridge and contact surface
- Figure 22A is a diagram showing dependencies of various parameters
- FIG. 22B shows a half contact bridge with different dimensions, which are important for FIG. 21A.
- FIG. 1 shows a starting device in a longitudinal section.
- FIG. 1 shows a starting device 10.
- This starting device 10 has, for example, a starter motor 13 and an electromagnetic switch 16, which is designed here as an engagement relay.
- the starter motor 13 and the switch 16 are fixed to a common drive end plate 19.
- the starter motor 13 is functionally to drive a starter pinion 22 when it is meshed in the ring gear 25 of the 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. Instead of electrical excitation, a permanent magnetic excitation of the stator comes into question.
- 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 is further attached, which is constructed, inter alia, of individual commutator fins 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 bearing plate 19. It supports the pole tube 28 on the drive bearing plate 19, and the commutator bearing cover 70 on the pole tube 28.
- a so-called sun gear 80 connects to the armature 37, which is part of a planetary gear 83.
- the sun gear 80 is surrounded by a plurality of planet wheels 86, usually three planet wheels 86, which are supported by means of roller bearings 89 on journals 92.
- the planet gears 86 roll in a ring gear 95, which is mounted outside in the pole tube 28.
- the planet wheels 86 are adjoined by a planetary carrier 98, in which the axle journals 92 are accommodated.
- the planet carrier 98 is in turn stored in an intermediate storage 101 and a slide bearing 104 arranged therein.
- the intermediate bearing 101 is designed cup-shaped, that in this both the planet carrier 98, and the planet wheels 86 are added. Furthermore, in the cup-shaped intermediate storage 101 is the
- Ring gear 95 arranged, which is ultimately closed by a cover 107 relative to the armature 37.
- 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 facing away 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, from.
- 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 various sections.
- the section which is arranged in the sliding bearing 104 of the intermediate bearing 101 a portion with a so-called spur teeth 125 (internal teeth), which is part of a so-called shaft-hub connection.
- This shaft-hub connection 128 in this case allows the axially straight sliding of a driver 131.
- This driver 131st is a sleeve-like extension which is integral 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 body 138 prevent in
- 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 switch 16 has a bolt 150, which carries an electrical contact 181 and the positive pole of an electrical
- Holding winding 165 arranged.
- the pull-in winding 162 and the holding winding 165 each cause an electromagnetic field in the switched-on state, which flows through both the relay housing 156 (made of electromagnetically conductive material), a linearly movable armature 168 and an armature return 171.
- the armature 168 carries a push rod 174, the linear
- Indentation of the armature 168 is moved 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 the contact 181 and a contact 180, so that attached to the contacts 180 and 181 end of the switching pin 177 contact bridge 184 connects both contacts 180 and 181 electrically , As a result, electric power is supplied from the bolt 150 via the contact bridge 184 and the bolt 151 to the power supply 61 and thus to the carbon brushes 58.
- the starter motor 13 is energized.
- the Heidelbergerl ⁇ or the armature 168 but also has the task of moving a traction element 187 a drive bearing plate 19 rotatably arranged lever.
- This lever 190 usually designed as a fork lever, surrounds with two "tines" not shown here on its outer circumference two discs 193 and 194 to move a trapped between these driver ring 197 to the freewheel 137 back against the resistance of the spring 200 and thereby the starter pinion 22 technicallyspuren in the ring gear 25.
- FIG. 2 further shows a contact release spring 220, which after the
- the contact bridge 184 pushes back to its initial position.
- the contact release spring 220 presses against a collar 223, which sits on the shift pin 177.
- the contact bridge 184 has in its center a hole 226, with which the contact bridge 184 is supported on a sleeve portion 229 of an axially movable guide collar 232.
- This guide collar 232 has between its outer contour and the switching pin 177 a substantially cylindrical cavity 235, in which in turn a compression spring 238 is supported.
- This compression spring 238 is supported on the end facing away from the contact bridge 184 of the switching pin 177 on a snap-on sleeve 241, which with snap elements 244 in a
- FIG. 3 shows a side view of the contact bridge 184.
- This contact bridge 184 shows a central planar section 270, which in its
- Center has the hole 226 ( Figure 4). From this central flat portion 270, which is perpendicular to the shift pin 177, radially outwardly from the center of the hole 226 outwards and thus starting from the shift pin 177 founded initially an outer surface portion 273 at. Diametrically opposed to this first outer surface portion 273 is a second outer surface portion 276. Both outer planar sections 273 and 276 have an approximately circular contour. Compared with the central planar section 270, both outer planar sections 273 and 276 are deflected by the angle ⁇ . This angle ⁇ preferably has a value between 1 ° and 15 °, with 5 ° being preferred. The outer plane Portions 273 and 276 have an edge 279 at their furthest from the center of the hole 226.
- the contact bridge 184 that this consists of so-called electro-copper (E-Cu57). Furthermore, it is provided that the angle ⁇ is equal to 5 °, the hardness of the material between 100 to 130 HV 10 has (Vickers hardness measurement method). For the material thickness d 2mm are provided.
- the length L of the contact bridge 184 is selected so that the contacting of the edges 279 takes place on the contacts 180 and 181.
- the rigidity of the contact bridge 184 is between 150 N / mm and
- FIG. 5 shows three different cross sections of the contact bridge 184.
- the lower part of Figure 5 shows the widest cross-section 290 at the widest point of the outer surface portion 273.
- FIG. 5 shows the cross section 293 at the transition point between the outer flat section 273 and the central flat section 270. At this point, the contact bridge 184 is fitted.
- the uppermost region of FIG. 5 shows the cross section 296, which is divided into two partial surfaces 297.
- the cross-section B-B shows the cross-section 296 which occurs at the widest point of the contact bridge 184 and at the same time cut centrally through the hole 226.
- the contact bridge 184 is guided by means of a switching pin 177 in a bearing in the form of a guide collar 232, and the contact bridge 184 between the switching pin 177 and the edge 279 has a region with the largest cross section 290 and between the region with the largest cross section 290 and the switching pin 177 has a reduced cross-section area 293.
- FIG 6 shows a plan view of the contact 180 of the bolt 151.
- the pin 151 shown there is equipped with a contact 180
- the contact surface 300 has a corrugation
- the one Ring corrugation 310 is.
- This contact surface 300 or its corrugation is such that, as shown in Figure 7, results in the corrugated contour in the cross-sectional view.
- This corrugated contour can be, for example, a sinusoidal profile or a similar profile with a wave shape, ie one with "valleys and mountains.”
- the corrugation shown here is an annular corrugation
- the wavy contour 303 or its "mountains and valleys" are coaxially oriented in the example about the center line 306 of the bolt 151.
- FIG. 8 a contact bridge 184, as is known from FIG. 4, is paired with a contact pin 151 whose contact surface 300 does not consist of an annular corrugation 310 but of a straight corrugation 309, FIG in section 8 drawn section line IX-IX is shown in Figure 9. Accordingly, there is shown the section through the contact pin 151, the associated bolt head 152 and the contact 180. As shown in section, you can see there
- Gererrriff 309 on which the edge 279 of the contact bridge 184 is arranged.
- Designation V 184 the speed, ie the movement of the contact bridge 184 for establishing the contact between contact 180 and contact bridge 184. After hitting the edge 279 on the contact 180, the edge 279 moves by the movement of the contact bridge 184 and the inclination angle ⁇ between the outer planar section 273 and the central planar
- Section 270 in a short movement in the direction of the arrow labeled V279. With reference to FIG. 9, this means a sliding of the edge 279 in the direction of the observer on the straight corrugation 209.
- the first embodiment and also the second embodiment show an electromagnetic switch 16 for a starting device 10, said electromagnetic switch 16 has two contacts 180 and 181, which are electrically conductively connected to each other by a movable contact bridge 184. It is thereby provided that at least one of the two contacts 180 or 181 is preferably fixed to a contact pin 151 or 150 connected contact surface 300 has. In this case, the contact surface 300 has elevations, which preferably lie substantially in one plane. An electrical contact between the contact bridge 184 and the contact-giving edge 279 of the contact bridge 184 is arranged so that it substantially from the impact on the contact surface 300 a
- contact 180, 181 and contact bridge 184 allows. Depending on the orientation of the straight corrugation 309 or relative position of the individual elevations of the straight corrugation 309 to the edge 279, initially only a single point contact between contact 180 or 181 and contact bridge 184 may be possible.
- the straight corrugation 309 should ideally be designed as sinusoidal longitudinal corrugation.
- the hardness of the contact 180 or 181 should be less than or equal to the hardness of the contact bridge 184. This is to ensure that not the contact bridge 184 but the contacts 180 and 181 wear out.
- Figure 10 shows a third embodiment of a contact bridge 184, as is known from Figure 4 and a contact 180, the contact surface
- the contact bridge 184 moves as in the embodiment of Figure 8 accordingly. Ie. the edge 279 moves transversely to the marked longitudinal axis 312 of the contact pin 151. In this case, the edge scrapes 279 along the contact surface 300. Macroscopically, the contact surface between the contact bridge 184 and the contact surface 300 results in a line shape.
- the embodiment of Figure 10 accordingly shows an electromagnetic switch 16 for a starting device 10 with two contacts 180, 181, which are electrically conductively connected to each other by a movable contact bridge 184, wherein at least one of the two contacts 180 or 181 preferably one with a contact pin 151 has fixed contact surface 300. It is thereby provided that the contact surface 300 is at least substantially planar and an electrical contact between contact bridge 184 and contact 180, 181 giving edge 279th the contact bridge 184 is arranged so that, starting from the impact on the contact surface 300, it essentially allows line contact between contact 180, 181 and contact bridge 184.
- a further definition of the manner in which the contact bridge 184 and the contact 180 or the contact 180 and the outer planar section 276 are oriented relative to one another may be indicated with reference to FIG.
- an angle ⁇ may be indicated which lies, for example, in the plane passing through the longitudinal axis 312 and the central axis of the hole
- This central axis of the hole 226 has the name 315 and coincides with the axis of movement of the switching pin 177, see also Figure 2.
- an electromagnetic switch 16 is for a
- Starting device 10 is provided with two contacts 180 and 181, which are electrically conductively connected to each other by a movable contact bridge 184, wherein at least one of the two contacts 180 or 181 preferably having a contact pin 151, 150 fixedly connected contact surface 300, wherein one for contact 180 directed surface 318 of the contact bridge
- a longitudinal axis 312 of a contact pin 151 between them include a directed to a central axis 315 of the switch 16 angle ß, which is greater than 90 °.
- This definition applies to the rest position or up to the position of the switching bridge 184, in which the contact bridge 184, the surface 300 just does not touch or powerless.
- angle ß is provided that this is between 91 ° and 105 °, preferably by 95 °.
- FIG. 11 shows a fourth exemplary embodiment of a switch 16. Since the details of the switch of Figure 11 differ from those of the switch according to Figure 2 only in a few details, only these differences will be discussed below.
- the contact bridge 184 has outer surface portions 276 and 273, which are inclined towards the contacts 180 and 181 or are bent, so the outer surface portions 276 and 273 of the contact bridge 184 are not inclined to the contacts 180 and 181, but inclined away from them.
- the angle of inclination ⁇ has a different sign compared with the exemplary embodiment according to FIG. 2 and the central areal section 270.
- the angle ⁇ is defined here as an angle which is arranged between the contact 180 directed surface 318 of the contact bridge 184 and a longitudinal axis 312 of a contact pin 151.
- the angle ⁇ is oriented in such a way that it lies in a plane which is formed by the longitudinal axis 312 and the central axis 315.
- the angle ß is directed radially outward and is greater than 90 °. With respect to the angle ß is provided that this is between 91 ° and 120 °.
- This size also refers to the position of the contact bridge 184 in the rest position, or before it touches the contact surface 180.
- the contacts 180 and 181 are designed in such a way that they have an edge 320 which, starting from the moment in which the contact bridge 184 engages on the
- Contact surface 300 impinges, causes a relative movement transverse to the central axis 315 between contact bridge 184 and contact 180 or 181. In this case, an edge 320 of the contact scrapes 180 or 181 on the contact bridge 184.
- angle ⁇ is provided that this has a value between -1 ° and -30 °.
- the choice of the angle is dependent on the coefficient of friction between the contact partners. Here, in the case where it is a high coefficient of friction, that the angle can be rather smaller, while at low coefficients of friction the angle is rather large.
- the fifth embodiment according to FIG. 12 shows, in a basic illustration, two contact pins 150 and 151 which are oriented with their contact surfaces 300 to the outer areal sections 273 and 276.
- the length of the contact bridge 184 transverse to the central axis 315 is greater than the outermost distance of the two contact pins 151 and 150 to each other. Accordingly, the outer laminar portions 273 and 276 respectively do not scrape at one of their edges against the surfaces 300 of the contact pins 150 and 151. In this case, the contact bridge 184 switches against sharp edges 330 of the contacts 180 and 181, respectively.
- the contact bridge 184 according to FIG. 13 does not switch against outermost edges of the contact pins 151 and 150, respectively, but against angled edges 333.
- FIG. 14 shows a seventh exemplary embodiment of a pairing of contact bridge 184 and contact pins 151 and 150, respectively.
- This seventh embodiment is a modification of the embodiment of Figure 13 and differs from this in that the contact bridge 184 no longer over the outermost contours of the two contact surfaces 300 and
- FIG. 15 shows a further, eighth exemplary embodiment of a pairing of a contact bridge 184 and two contact pins 150 and 151, respectively.
- Contact pins 151 and 150 have two bevels 336 in the region of their bolt heads 152 directed towards one another. Although these two bevels 336 are substantially directed to each other, but not parallel to each other.
- a contact bridge 184 is present whose length is shorter than the largest distance of the chamfers 336 to each other, but larger than the smallest
- FIG. 16 shows a contact bridge 184 in a further alternative
- This contact bridge also has a central areal section 270 and two outer areal sections 273 and 276, respectively.
- the central areal section 270 also has a hole 226 in its center.
- the edges 279 are in contrast, for example, to the embodiment of Figure 3 and Figure 4 is not round, but straight.
- the outer planar sections 273 and 279 are also shown at an angle ⁇ to the central planar section 270 analogous to the embodiment of Figure 3 and Figure 4.
- the contact bridge 184 can have two outer planar sections 273 and 276, which in contrast to the exemplary embodiment according to FIG. 16 are slotted in such a way that the respective planar sections are designed as two lugs 340 , Instead of the designation flags would be for example also the designation
- Figure 18 shows a contact bridge 184, which is designed substantially rectangular. In turn, it has a central planar section 270 and two outer planar sections 276 and 273. Central in the planar section 270, in turn, a hole 226 is arranged. While a top view can be seen in FIG. 18a, a sectional view of the contact bridge 184 is shown in FIG. 18b. This sectional view shows the bending of the outer flat sections 273 and 276 by the angle ⁇ . To influence or increase the flexibility of the outer planar sections 273 and 276 these are about
- Notches 350 are connected to the central panel 270.
- the notches may, as here in the example, be arranged on both sides of the surface of the contact bridge 184, but also, if appropriate, alternatively on one side.
- These notches 350 are here designed as semicircular corrugations to reduce the cross section and reduce the flexural rigidity of the contact bridge 184.
- a further contact bridge 184 is shown in a plan view and a sectional view.
- the constrictions to reduce the cross section or reduce the flexural rigidity of the contact bridge 184 need not, as shown in FIGS. 19a and 19b.
- FIG. 20 shows a contact bridge 184 in longitudinal section.
- This contact plate in turn has a central areal section 270 and two outer areal sections 273 and 276.
- the central sheet-like section 270 in turn has a hole 226, as in the previous embodiments for Ko ntaktb back have 184 also.
- This contact bridge 184 consists of several layers.
- a first layer is a carrier layer 400 and a second layer attached to this carrier layer 400 is a contact layer 403.
- the properties are optimized by forming the contact bridge 184 of a plurality of layers.
- the first layer namely the backing layer 400, has favorable properties as a retaining, stability and elasticity-imparting element.
- the contact layer 403 has optimized properties with regard to the contact between contact bridge 184 and contact 180 or 181.
- the carrier layer 400 of a copper or a silver alloy or steel or
- the contact layer 403 it is provided that it consists of a copper, tin, gold or silver alloy or a metal-metal oxide composite material.
- these also consist of electro-copper and have a hardness between 100 and 130 HV10.
- edges 279 and 320 With respect to the edges 279 and 320, it is provided that this has a radius of ⁇ 0.3 mm. This leads to a “chisel effect", so that the edges 279 and 320 remove interfering layers in the respective opposite contact, thereby significantly improving the contacting properties In the region of the edges 279 and 320, there is preferably one
- edges 279 and 320 moreover have the advantage that ice layers formed by possible atmospheric moisture in the switch are broken on the contacts 180 or 181.
- the corresponding metal sheet preferably has a thickness of between 1 and 4 mm.
- a method for switching the electromagnetic switch 16 wherein it has two contacts 180 and 181, which are connected by a movable contact bridge 184.
- a scraping movement between the contact bridge 184 and the contact surface 300 of the contact 181 or 180 acts. Either slides the contact bridge with its surface in the form of an edge 279 on the
- the edge 279 serves to scrape on the surface of the contacts 180 and 181, thereby creating friction and ultimately converting energy.
- the energy to be converted is the kinetic energy of the energy
- FIG 21 shows a side or sectional view of the contact bridge 184, which makes an electrical connection with the contact 180 of the bolt 151.
- the contact 180 or its contact surface 300 has a corrugation which is an annular corrugation 310.
- This contact surface 300 or its corrugation is such that, in the cross-sectional view results in a wavy contour.
- This corrugated contour can be, for example, a sinusoidal profile or a similar profile with wave shape, ie one with "valleys and mountains", see also FIG. 6.
- the corrugation shown here is an annular corrugation 310, ie the corrugated contour 303 or its "mountains and valleys "are coaxially oriented in the example about the centerline 306 of the bolt 151.
- the contact bridge 184 slides or rubs along an edge 420 of the wave-shaped contour 303 when switching or contacting with its outer flat section 276.
- FIG. 22A shows a diagram in which, depending on a
- Constriction ratio and a lever arm ratio the bending stress is shown in the constriction area.
- the constriction area is the area of the contact bridge 184 which corresponds to the waisted cross section 293 shown in FIG. In principle, this applies to all reduced in cross-section contact bridges 184, as shown for example in Figures 16 to 19.
- Cross section 293 is greater than 20 N / mm2. Furthermore, the bending stress S should be less than 100N / mm 2. It is desirable for the necking ratio V to be less than or equal to 75%, preferably greater than 25%. A ratio between 70% and 35% has proven particularly favorable.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Contacts (AREA)
- Push-Button Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008043186A DE102008043186A1 (en) | 2008-10-27 | 2008-10-27 | Electromagnetic switch for a starting device and method for switching the electromagnetic switch |
PCT/EP2009/064153 WO2010049421A2 (en) | 2008-10-27 | 2009-10-27 | Electromagnetic switch for a starting device, and method for switching the electromagnetic switch |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2342726A2 true EP2342726A2 (en) | 2011-07-13 |
EP2342726B1 EP2342726B1 (en) | 2016-08-31 |
Family
ID=41490384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09744383.2A Active EP2342726B1 (en) | 2008-10-27 | 2009-10-27 | Contactor for an electric starter and method for switching the contactor |
Country Status (8)
Country | Link |
---|---|
US (1) | US8786388B2 (en) |
EP (1) | EP2342726B1 (en) |
JP (1) | JP5683472B2 (en) |
CN (1) | CN102265364B (en) |
DE (1) | DE102008043186A1 (en) |
ES (1) | ES2605748T3 (en) |
HU (1) | HUE029788T2 (en) |
WO (1) | WO2010049421A2 (en) |
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DE102010027823A1 (en) * | 2010-04-15 | 2011-10-20 | Robert Bosch Gmbh | Starting device with an electromagnetic switch and method for switching the electromagnetic switch |
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DE102012218751B4 (en) * | 2012-10-15 | 2014-09-18 | Tyco Electronics Amp Gmbh | Switch and method for manufacturing a switch |
JP6609096B2 (en) * | 2014-08-07 | 2019-11-20 | 株式会社デンソー | Electromagnetic switch |
DE102015224287B4 (en) * | 2015-12-04 | 2019-09-19 | Seg Automotive Germany Gmbh | Electromagnetic switch |
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DE102017220503B3 (en) * | 2017-11-16 | 2019-01-17 | Te Connectivity Germany Gmbh | Double interrupting switch |
CN118248498A (en) * | 2018-02-07 | 2024-06-25 | Tdk电子股份有限公司 | Switching device for switching an electrical load |
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CN108493017B (en) * | 2018-05-21 | 2019-12-20 | 江苏泓光轨道设备有限公司 | Change-over switch group for railway switch machine |
US20190385804A1 (en) * | 2018-06-19 | 2019-12-19 | Ford Global Technologies, Llc | Contactor assembly and contactor transitioning method |
CN112930438B (en) * | 2018-11-09 | 2023-01-03 | 三菱电机株式会社 | Electromagnetic switch device |
DE102019117386A1 (en) * | 2019-06-27 | 2020-12-31 | Bayerische Motoren Werke Aktiengesellschaft | Switch for establishing an electrically conductive connection |
CN112002611B (en) * | 2020-08-19 | 2022-06-28 | 厦门理工学院 | Movable contact propulsion structure and relay thereof |
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2009
- 2009-10-27 EP EP09744383.2A patent/EP2342726B1/en active Active
- 2009-10-27 ES ES09744383.2T patent/ES2605748T3/en active Active
- 2009-10-27 HU HUE09744383A patent/HUE029788T2/en unknown
- 2009-10-27 JP JP2011532666A patent/JP5683472B2/en active Active
- 2009-10-27 CN CN200980152621.9A patent/CN102265364B/en active Active
- 2009-10-27 WO PCT/EP2009/064153 patent/WO2010049421A2/en active Application Filing
- 2009-10-27 US US13/126,298 patent/US8786388B2/en active Active
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Also Published As
Publication number | Publication date |
---|---|
CN102265364A (en) | 2011-11-30 |
US20110279202A1 (en) | 2011-11-17 |
ES2605748T3 (en) | 2017-03-16 |
JP5683472B2 (en) | 2015-03-11 |
DE102008043186A1 (en) | 2010-04-29 |
HUE029788T2 (en) | 2017-04-28 |
JP2012507111A (en) | 2012-03-22 |
WO2010049421A2 (en) | 2010-05-06 |
US8786388B2 (en) | 2014-07-22 |
CN102265364B (en) | 2014-12-10 |
WO2010049421A3 (en) | 2010-06-24 |
EP2342726B1 (en) | 2016-08-31 |
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