EP2058830B1 - Electromagnetic switch for an electrical machine - Google Patents
Electromagnetic switch for an electrical machine Download PDFInfo
- Publication number
- EP2058830B1 EP2058830B1 EP08105676.4A EP08105676A EP2058830B1 EP 2058830 B1 EP2058830 B1 EP 2058830B1 EP 08105676 A EP08105676 A EP 08105676A EP 2058830 B1 EP2058830 B1 EP 2058830B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protective cap
- pot
- pot bottom
- armature
- housing
- 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.)
- Not-in-force
Links
- 230000001681 protective effect Effects 0.000 claims description 70
- 239000007858 starting material Substances 0.000 claims description 25
- 238000005452 bending Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000003467 diminishing effect Effects 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000011324 bead Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
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
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/023—Details concerning sealing, e.g. sealing casing with resin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
- H01H2009/048—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings using a sealing boot, e.g. the casing having separate elastic body surrounding the operating member and hermetically closing the opening for it
Definitions
- the invention relates to an electromagnetic switch, in particular a starter relay, for an electric starter motor for controlling to engage a starter pinion when starting an internal combustion engine, with a housing, an electromagnetically controllable armature of a control lever and a flexible cap, the seals a transition from the housing to the anchor, wherein the protective cap is pot-shaped with a pot opening and a pot bottom, the pot bottom has a circular opening with a thickened ring for positive connection with the anchor and the pot opening formed reinforced on the peripheral edge for positive connection with the housing is.
- the pot bottom seen in cross-section, has a desired bending range.
- the invention further relates to a fastening method of a protective cap for an electromagnetic switch, wherein the protective cap sealingly connects a housing and an armature.
- a protective cap which has a flange-shaped bead at its pot opening.
- the protective cap is attached to the housing of an electromagnetic switch.
- a ring which is screwed from the outside onto the flange of the protective cap, creates a form-liquid connection of the protective cap to the housing of the electromagnetic switch.
- the protective cap is also referred to as rubber bellows due to its elastic rubber material.
- the DE 102 60 843 A1 describes a starter relay for engaging a starter pinion in a ring gear of an internal combustion engine to switch a starter motor for starting.
- An elastic cup-shaped protective cap closes a free end of a controllable anchor rod with the housing of the starter relay.
- the cup-shaped protective cap is formed bellows-shaped in a mounting portion in the region of the housing. The protective cap is pushed in the retracted state of the anchor rod. In the extended state of the anchor rod, the cap has a cone-shaped wall to the anchor rod.
- the JP 2005-174590 A1 describes an electromagnetic switch for starter motors with a cup-shaped protective cap.
- the DE 28 43 593 A1 describes an AC magnet with an actuator and an excitation coil, wherein the actuator is secured to the exciter coil by means of a bellows for protection against dirt and moisture.
- the bellows is a bellows and has at Faltenbalgende or at the opening a circular bead which is form-fitting on the housing can be fitted on.
- a circular opening in the pot bottom of the protective cap engages in a press fit the anchor rod of the electromagnetic switch.
- the protective cap folds around in a desired bending area.
- the protective cap during insertion of the anchor rod into the housing of the switch possibly corners, in plan view, for example, in a triangle form. This leads to increased material fatigue and thus to a faster destruction of the cap.
- Protective cap bulges may come into contact with the contour of the housing and the anchor rod and thus cause increased wear and life of the protective cap.
- the formation of strongly folded corners can also be represented in a force-displacement curve of a cup-shaped protective cap whose force increases exponentially to a maximum. At the maximum, the protective cap beats through, so to speak, assuming a lower energy level, starting from the path at which the corners form and a magnetically generated pull-in force of the armature counteracting opposing force of the protective cap is reduced.
- the pot base of the protective cap has at least two predetermined bending areas in the radial direction when viewed in cross-section.
- the first desired bending region has a large diameter, substantially the diameter corresponding to the outer diameter of the top shape of the protective cap and at least a second desired bending region has a smaller diameter than the cup shape of the protective cap and coaxial with the cup shape of the protective cap. Due to the two desired bending areas, the formation of corners when retracting the pot bottom into the cup-shaped protective cap is reliably avoided. A circular fold creates in contrast to trained corners no additional wear, so that the lifetime is advantageously long.
- the bottom of the pot has at least two punctures with increasing path of movement of the pot bottom in the interior of the pot, wherein in a breakdown of a generated by the flexible cap counterforce with respect to the progressive path of movement decreases inwardly for a short time.
- the large breakdown which has proved to be disadvantageous is in the rear region of the path of movement of the pot bottom replaced in the direction of pot opening by a plurality of small punctures in the initial and central region of the movement path of the pot bottom according to the invention.
- These several small punctures lead to a defined circular folding from the inside to the outside and do not lead to a negative Aufhornung, such as the formation of corners during the so-called unrolling of the cap.
- the protective cap is preferably made of a silicone rubber material for flexible circular folding.
- the bottom of the pot has three punctures, wherein seen in cross section in the radial direction two rounded steps are formed in the bottom of the pot, which are connected to a curved or conical connection region.
- a protective cap has the advantage that the protective cap space and material is optimizing.
- the circular opening in the bottom of the pot is formed with a circular, final and sealing ring, as seen in cross-section.
- the ring is freely pivotable in an annular groove on the armature in the radial direction by an angular range. This has the advantage of a long life of the cap with it.
- the Fig. 1 shows in cross-section a starting device for starting an internal combustion engine of a vehicle with an electromagnetic switch, which is referred to as a starter relay 1 hereinafter.
- the starter relay 1 comprises a housing 2 with an electromagnetically controllable armature 3.
- the electromagnetic armature 3 is by means of at least one in the Fig. 2 drawn spring 8 pushed out of the housing 2 on one side.
- the starter relay 1 is energized, the armature 3 is pulled into the housing 2.
- armature 3 is a control lever 4, which brings a starter pinion of an electromagnetic starter motor 40 into engagement, so that an internal combustion engine is started upon actuation of the starter motor 40.
- the transition from the housing 2 to the armature 3 must be sealed to prevent the ingress of moisture into the starter relay 1, in particular in Fig. 2 shown contact space 9 from the armature 3, to prevent. Corrosion in the contact space 9 can lead to contact difficulties and corrosion at the armature 3 and thus to a stiff starter relay 1 or to functional failure.
- a flexible cap 5 made of a silicone rubber material intended.
- the protective cap 5 is cup-shaped.
- a pot bottom 6 is sealingly connected to the armature 3 and on the other side a pot opening 7 is sealed by the protective cap 5 with the housing 2.
- the Fig. 2 shows an enlarged section in a sectional view of Fig. 1 the transition between the housing 2 and the armature 3.
- the armature 3 is pushed out of the magnetic contact space 9 by means of the spring 8.
- This strained and not energized state shows the Fig. 2 ,
- the housing 2 has to guide the armature 3, a cylindrical flange 10 which has a circumferential housing groove 11 on the outside.
- the housing groove 11 is to highlight the inner wall in the region of the pot opening 7 of the in the Fig. 3 shown protective cap 5 formed complementary.
- a driver 12 with a Einspurfeder 13 is guided in the armature 3.
- the driver 12 acts directly on the in Fig. 1 shown control lever 4 a.
- a closure cap 14 closes the Einspurfeder 13 in the armature 3 from.
- the closure cap 14 has a circumferential annular groove 15.
- the annular groove 15 takes a thickened ring 17 of a circular opening 16 in the bottom of the pot 6 of the cap 5, as in the Fig. 3 shown on.
- the Fig. 3 shows in cross section the protective cap 5 according to the invention according to the preferred embodiment.
- the protective cap 5 is substantially pot-shaped.
- the protective cap 5 has the circular opening 16 in the pot bottom 6.
- the circular opening 16 is formed in the bottom of the pot 6 with a circular in cross-section, final and sealing the armature 3 ring 17.
- the ring 17 is placed and fitted during assembly of the starter relay 1 in the annular groove 15 of the cap 14.
- the pot bottom 6 further has a compensation opening 18 to allow gas volume to flow out of or into the protective cap 5 when the pot bottom 6 is moved in the direction of the pot opening 7 or away from the pot opening 7.
- the protective cap 5 has for the positive connection with the housing 2 on its inner wall 19 an annular bead 20, seen in cross-section in the form of a semicircle, the pot opening 7 is formed thickening.
- the outer wall 21 is seen to the pot opening 7 in cross-section conical enlarged with then cylindrical, constant strength - seen in cross section - formed in a rectangular shape.
- the outer wall 21 is thus formed opposite to the bead 20 as a cylindrical wall 22.
- the pot bottom 6 seen in cross section in the radial direction in contrast to the prior art not only a desired bending range, but at least two desired bending areas with a first and a second stage 23, 24.
- the steps 23, 24 are rounded in the protective cap 5 produced from a silicone rubber material and connected by means of a connecting region 25 rounded off in a manner complementary to the first and second steps 23, 24. Due to the two stages 23, 24 and the connection region 25 in the bottom of the pot 6 results in a collection of the bottom of the pot 6 a defined circular folding of the bottom of the pot 6 at the same time minimal space.
- the Fig. 4 shows the protective cap 5 according to the invention in the installed state in a cross-sectional view of the in Fig. 2 shown detail.
- the ring 17 of the pot bottom 6 is located in the annular groove 15 of the cap 14.
- the pot opening 7 is positively connected to the cylindrical flange 10 of the housing 2.
- Fig. 4 shows the starter relay 1 with an armature 3 in the de-energized state.
- the Fig. 5 shows a radial cross-section of a protective cap 5 according to the invention with a relaxed anchor 3.
- the protective cap 5 has according to this embodiment, the positive connection of the pot opening 7 with the cylindrical flange 10 of the housing 2.
- the bottom of the pot 6 has only one step 23, which has a defined round bend according to the Fig. 6 generated when the armature 3 with the cap 14 in the in the Fig. 4 shown contact space 9 retracts.
- the Fig. 6 shows the protective cap 5 in an at least partially retracted state of the armature 3.
- the seen in cross section circular ring 17 can pivot in the annular groove 15 of the cap 14 in an angular range of at least 30 to 60 °.
- the cylindrical wall 22 of the outer wall 21 terminates flush with the cylindrical flange 10 of the housing 2.
- a cylindrical inner wall of a housing cover 26 is formed directly adjacent to the cylindrical wall 22, so that the positive connection of the pot opening 7 with the cylindrical flange 10 of the housing 2 securely seals and can not slip out.
- the Fig. 6 shows the protective cap 5 with a circular fold in the area of the first stage 23.
- the cap 5 no longer evenly round, but forms with strongly folded corners.
- the bulges formed as corners come into contact with the contours of the housing cover 26 or of the drive bearing, ie with the control lever 4 designed as a fork. This can lead to a lifetime reduction due to increased wear.
- the protective cap 5 as in the Fig. 7 shown in perspective view, in the region of the pot bottom 6, two target bending areas with a first stage 23 and second stage 24.
- the circular opening 16 is minimally driven.
- the wall of the protective cap 5 initially extends radially outward to a diameter of the first stage 24 which is smaller than the end diameter of the protective cap 5.
- the wall bends obliquely to the radius in the axial direction to then approach the final outer diameter in a continuous transition in the first stage 23.
- the wall thickness of the protective cap 5 can steadily increase in a particular embodiment of the first stage 23 to the pot opening 7.
- the Fig. 8 shows the protective cap 5 according to the invention according to the Fig. 7 in a perspective view in the retracted state of the bottom of the pot. 6
- the Fig. 9 shows a force-displacement curve 27 of the protective cap 5 according to the second preferred embodiment.
- the force-displacement curve 27 shows that a counterforce F of the protective cap 5 increases exponentially with increasing movement path X of the pot base 6 in the direction of the pot opening 7.
- the protective cap 5 has a rolling behavior with a plurality of smaller punches 28, 29 or 30. After a breakdown, the counterforce F generated by the flexible protective cap 5 briefly decreases with respect to the progressive movement path X.
- the protective cap 5 according to the invention folds round. Folded corners, for example in the triangle, which lead to material fatigue and premature destruction of the protective cap, are avoided according to the force-displacement curve 27.
- the small punctures 28, 29, 30 lead to a circular folding and not to a square deformation during the rolling of the pot bottom. 6
- the Fig. 10 shows a cross-sectional view of the in the Fig. 8 in perspective cap shown 5.
- the circular opening 16 of the pot bottom is retracted maximum inward.
- the first stage 23 is folded around the entire circumference, the second stage 24 is curved inward or straightened and in the connection region 25, in which the wall of the pot base 6, viewed in cross-section, is bent at an angle to the pot opening 7 and no longer from the pot opening 7.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Motor Or Generator Frames (AREA)
Description
Die Erfindung bezieht sich auf einen elektromagnetischen Schalter, insbesondere ein Starterrelais, für einen elektrischen Startermotor zum Steuern, um ein Starterritzel beim Anlassen einer Brennkraftmaschine in Eingriff zu bringen, mit einem Gehäuse, einem darin elektromagnetisch steuerbaren Anker eines Steuerhebels und mit einer flexiblen Schutzkappe, die einen Übergang vom Gehäuse zum Anker abdichtet, wobei die Schutzkappe topfförmig mit einer Topföffnung und einem Topfboden ausgebildet ist, der Topfboden eine kreisförmige Öffnung mit einem verdickten Ring zur formschlüssigen Verbindung mit dem Anker aufweist und die Topföffnung am Umfangsrand zur formschlüssigen Verbindung mit dem Gehäuse verstärkt ausgebildet ist. Der Topfboden weist im Querschnitt gesehen einen Soll-Biegebereich auf. Die Erfindung bezieht sich ferner auf ein Befestigungsverfahren einer Schutzkappe für einen elektromagnetischen Schalter, wobei die Schutzkappe ein Gehäuse und einen Anker abdichtend verbindet.The invention relates to an electromagnetic switch, in particular a starter relay, for an electric starter motor for controlling to engage a starter pinion when starting an internal combustion engine, with a housing, an electromagnetically controllable armature of a control lever and a flexible cap, the seals a transition from the housing to the anchor, wherein the protective cap is pot-shaped with a pot opening and a pot bottom, the pot bottom has a circular opening with a thickened ring for positive connection with the anchor and the pot opening formed reinforced on the peripheral edge for positive connection with the housing is. The pot bottom, seen in cross-section, has a desired bending range. The invention further relates to a fastening method of a protective cap for an electromagnetic switch, wherein the protective cap sealingly connects a housing and an armature.
Aus dem Stand der Technik ist eine Schutzkappe bekannt, die an ihrer Topföffnung einen flanschförmigen Wulst aufweist. Mittels des flanschförmigen Wulstes ist die Schutzkappe am Gehäuse eines elektromagnetischen Schalters befestigt. Ein Ring, der von außen auf den Flansch der Schutzkappe geschraubt ist, schafft eine formflüssige Verbindung der Schutzkappe mit dem Gehäuse des elektromagnetischen Schalters. Die Schutzkappe wird aufgrund ihres elastischen Gummimaterials auch als Gummibalg bezeichnet. Es ist zudem folgender Stand der Technik bekannt.From the prior art, a protective cap is known which has a flange-shaped bead at its pot opening. By means of the flange-shaped bead, the protective cap is attached to the housing of an electromagnetic switch. A ring, which is screwed from the outside onto the flange of the protective cap, creates a form-liquid connection of the protective cap to the housing of the electromagnetic switch. The protective cap is also referred to as rubber bellows due to its elastic rubber material. In addition, the following prior art is known.
Die
Die
Die
Es ist Aufgabe der Erfindung, einen elektromagnetischen Schalter der eingangs genannten Art derart weiterzubilden, dass ein einfacher Zusammenbau mit hoher Lebensdauer des Schalters unter Beibehaltung der erforderlichen Dichtwirkung mit minimalem Bauraum realisiert wird.It is an object of the invention to provide an electromagnetic switch of the type mentioned in such a way that a simple assembly with a long service life of the switch while maintaining the required sealing effect is realized with minimal space.
Erfindungsgemäß wird die Aufgabe durch den Gegenstand des Patentanspruchs 1 gelöst. Vorteilhafte Weiterbildungen ergeben sich aus den abhängigen Ansprüchen.According to the invention the object is achieved by the subject matter of patent claim 1. Advantageous developments emerge from the dependent claims.
Eine kreisförmige Öffnung im Topfboden der Schutzkappe umgreift in einer Presspassung die Ankerstange des elektromagnetischen Schalters. Normalerweise faltet die Schutzkappe sich in einem Soll-Biegebereich rund. Es kann jedoch aufgrund der minimalen Bauraumverhältnisse und der neuen formschlüssigen Verbindung zwischen Schutzkappe und Gehäuse vorkommen, dass die Schutzkappe beim Einfahren der Ankerstange in das Gehäuses des Schalters sich möglicherweise Ecken, in der Draufsicht beispielsweise in einem Dreieck, ausbilden. Dies führt zu einer erhöhten Materialermüdung und damit zu einer schnelleren Zerstörung der Schutzkappe. Ausbuchtungen der Schutzkappe können mit der Kontur des Gehäuses und der Ankerstange in Kontakt kommen und somit einen erhöhten Verschleiß und eine Lebensdauerreduzierung der Schutzkappe verursachen. Diese Folgeerscheinungen treten auf, weil die Schutzkappe beim Einfahren des Ankers in das Gehäuse - wie erwünscht - nicht mehr gleichmäßig rund, sondern eckig faltet. Es bilden sich also stark gefaltete Ecken aus. Das Ausbilden von stark gefalteten Ecken lässt sich auch in einer Kraft-Weg-Kurve einer topfförmigen Schutzkappe darstellen, deren Kraft zum Weg exponentiell bis zu einem Maximum zunimmt. Beim Maximum schlägt die Schutzkappe sozusagen durch, nimmt ein niedrigeres Energieniveau an, ab dem Weg, an dem sich die Ecken ausbilden und eine magnetisch erzeugte Einzugskraft des Ankers entgegenwirkende Gegenkraft der Schutzkappe reduziert sich.A circular opening in the pot bottom of the protective cap engages in a press fit the anchor rod of the electromagnetic switch. Normally, the protective cap folds around in a desired bending area. However, it may occur due to the minimal space conditions and the new positive connection between the protective cap and housing, that the protective cap during insertion of the anchor rod into the housing of the switch possibly corners, in plan view, for example, in a triangle form. This leads to increased material fatigue and thus to a faster destruction of the cap. Protective cap bulges may come into contact with the contour of the housing and the anchor rod and thus cause increased wear and life of the protective cap. These consequences occur because the protective cap when retracting the anchor into the housing - as desired - no longer evenly round, but folds square. So strong folded corners are formed. The formation of strongly folded corners can also be represented in a force-displacement curve of a cup-shaped protective cap whose force increases exponentially to a maximum. At the maximum, the protective cap beats through, so to speak, assuming a lower energy level, starting from the path at which the corners form and a magnetically generated pull-in force of the armature counteracting opposing force of the protective cap is reduced.
Gemäß eines weiteren wesentlichen, die Aufgabe lösenden Erfindungsgedankens weist der Topfboden der Schutzkappe im Querschnitt gesehen in radialer Richtung zumindest zwei Soll-Biegebereiche auf. Der erste Soll-Biegebereich weist einen großen Durchmesser, im Wesentlichen dem Außendurchmesser der Topform der Schutzkappe entsprechenden Durchmesser auf und zumindest ein zweiter Soll-Biegebereich hat einen kleineren Durchmesser als die Topfform der Schutzkappe und koaxial zur Topfform von der Schutzkappe. Aufgrund der zwei Soll-Biege-Bereiche wird das Ausbilden von Ecken beim Einfahren des Topfbodens in die topfförmige Schutzkappe sicher vermieden. Eine Rundfaltung schafft im Gegensatz zu ausgebildeten Ecken keinen zusätzlichen Verschleiß, so dass die Lebensdauer vorteilhaft lang ist. Der Topfboden weist mindestens zwei Durchschläge bei zunehmendem Bewegungsweg des Topfbodens in das Innere des Topfs auf, wobei bei einem Durchschlag eine von der flexiblen Schutzkappe erzeugte Gegenkraft bezüglich des fortschreitenden Bewegungswegs nach innen kurzzeitig zurückgeht. Erfindungsgemäß wird der sich als nachteilig erwiesene große Durchschlag im hinteren Bereich des Bewegungswegs des Topfbodens in Richtung Topföffnung durch mehrere kleine Durchschläge im anfänglichen und mittleren Bereich des Bewegungswegs vom erfindungsgemäßen Topfboden ersetzt. Diese mehreren kleinen Durchschläge führen zu einer definierten Rundfaltung von innen nach außen und führen nicht zu einer negativen Aufhornung, wie der Ausbildung von Ecken während des so genannten Abrollens der Schutzkappe. Die Schutzkappe ist zur flexiblen Rundfaltung bevorzugt aus einem Silikon-Gummiwerkstoff hergestellt.According to a further essential idea of the invention that achieves the object, the pot base of the protective cap has at least two predetermined bending areas in the radial direction when viewed in cross-section. The first desired bending region has a large diameter, substantially the diameter corresponding to the outer diameter of the top shape of the protective cap and at least a second desired bending region has a smaller diameter than the cup shape of the protective cap and coaxial with the cup shape of the protective cap. Due to the two desired bending areas, the formation of corners when retracting the pot bottom into the cup-shaped protective cap is reliably avoided. A circular fold creates in contrast to trained corners no additional wear, so that the lifetime is advantageously long. The bottom of the pot has at least two punctures with increasing path of movement of the pot bottom in the interior of the pot, wherein in a breakdown of a generated by the flexible cap counterforce with respect to the progressive path of movement decreases inwardly for a short time. According to the invention, the large breakdown which has proved to be disadvantageous is in the rear region of the path of movement of the pot bottom replaced in the direction of pot opening by a plurality of small punctures in the initial and central region of the movement path of the pot bottom according to the invention. These several small punctures lead to a defined circular folding from the inside to the outside and do not lead to a negative Aufhornung, such as the formation of corners during the so-called unrolling of the cap. The protective cap is preferably made of a silicone rubber material for flexible circular folding.
Bei einer weiteren bevorzugten Ausführungsform weist der Topfboden drei Durchschläge auf, wobei im Querschnitt gesehen in radialer Richtung zwei abgerundete Stufen im Topfboden ausgebildet sind, die mit einem gewölbten oder konischen Verbindungsbereich verbunden sind. Eine solche Schutzkappe hat den Vorteil, dass die Schutzkappe Bauraum und Material optimierend ausgebildet ist.In a further preferred embodiment, the bottom of the pot has three punctures, wherein seen in cross section in the radial direction two rounded steps are formed in the bottom of the pot, which are connected to a curved or conical connection region. Such a protective cap has the advantage that the protective cap space and material is optimizing.
Um eine flexible, effiziente Abdichtung zwischen Topfboden und Anker zu schaffen, ist die kreisförmige Öffnung im Topfboden mit einem im Querschnitt gesehen kreisförmigen, abschließenden und abdichtenden Ring ausgebildet. Der Ring ist in einer Ringnut am Anker in radialer Richtung gesehen um einen Winkelbereich freischwenkbar. Dies bringt den Vorteil einer langen Lebensdauer der Schutzkappe mit sich.In order to provide a flexible, efficient seal between the bottom of the pot and the anchor, the circular opening in the bottom of the pot is formed with a circular, final and sealing ring, as seen in cross-section. The ring is freely pivotable in an annular groove on the armature in the radial direction by an angular range. This has the advantage of a long life of the cap with it.
Es versteht sich, dass die vorstehend genannten und nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen verwendbar sind.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations.
Die Erfindung wird im Folgenden anhand von Ausführungsbeispielen unter Bezugnahme auf Zeichnungen näher erläutert. Es zeigen:
- Fig. 1
- eine Querschnittsansicht einer Startervorrichtung,
- Fig. 2
- einen vergrößerten Ausschnitt einer Querschnittsansicht eines Starterrelais ohne Schutzkappe,
- Fig. 3
- eine erfindungsgemäße Schutzkappe im Querschnitt,
- Fig. 4
- einen vergrößerten Ausschnitt der
Fig. 2 mit Schutzkappe, - Fig. 5, 6
- einen Querschnitt einer ersten Ausführungsform der Schutzkappe in einer oberen und unteren Stellung,
- Fig. 7, 8
- eine perspektivische Ansicht der Schutzkappe aus
Fig. 3 , - Fig. 9
- eine Kraft-Weg-Kurve der Schutzkappe aus
Fig. 2 und - Fig. 10
- eine Querschnittsansicht der Schutzkappe gemäß
Fig. 8 .
- Fig. 1
- a cross-sectional view of a starter device,
- Fig. 2
- an enlarged detail of a cross-sectional view of a starter relay without protective cap,
- Fig. 3
- a protective cap according to the invention in cross section,
- Fig. 4
- an enlarged section of the
Fig. 2 with protective cap, - Fig. 5, 6
- a cross section of a first embodiment of the protective cap in an upper and lower position,
- Fig. 7, 8
- a perspective view of the cap
Fig. 3 . - Fig. 9
- a force-displacement curve of the cap
Fig. 2 and - Fig. 10
- a cross-sectional view of the cap according to
Fig. 8 ,
Die
Zur Abdichtung ist eine flexible Schutzkappe 5 aus einem Silikongummiwerkstoff vorgesehen. Die Schutzkappe 5 ist topfförmig ausgebildet. Ein Topfboden 6 ist dichtend mit dem Anker 3 verbunden und auf der anderen Seite ist eine Topföffnung 7 von der Schutzkappe 5 mit dem Gehäuse 2 abgedichtet.For sealing is a
Die
Die
Die Schutzkappe 5 hat zur formschlüssigen Verbindung mit dem Gehäuse 2 an ihrer Innenwand 19 einen ringförmigen Wulst 20, der im Querschnitt gesehen in Form eines Halbkreises die Topföffnung 7 verdickend ausgebildet ist.The
Zur Verstärkung des Umfangsrands im Bereich der Topföffnung 7 und somit zur verbesserten Abdichtungswirkung der Schutzkappe 5 ist die Außenwand 21 zur Topföffnung 7 hin im Querschnitt gesehen konisch vergrößert mit anschließend zylindrischer, gleich bleibender Stärke - im Querschnitt gesehen - in Rechteckform ausgebildet. Die Außenwand 21 ist somit gegenüberliegend zum Wulst 20 als zylindrische Wandung 22 ausgebildet.To reinforce the peripheral edge in the region of the
Erfindungsgemäß weist der Topfboden 6 im Querschnitt gesehen in radialer Richtung im Gegensatz zum Stand der Technik nicht nur einen Soll-Biegebereich, sondern zumindest zwei Soll-Biegebereiche mit einer ersten und einer zweiten Stufe 23, 24 auf. Die Stufen 23, 24 sind in der aus einem Silkon-Gummiwerkstoff hergestellten Schutzkappe 5 abgerundet und mittels eines komplementär zur ersten und zweiten Stufe 23, 24 abgerundeten Verbindungsbereichs 25 verbunden. Aufgrund der zwei Stufen 23, 24 und dem Verbindungsbereich 25 im Topfboden 6 ergibt sich bei einem Einzug des Topfbodens 6 eine definierte Rundfaltung des Topfbodens 6 bei gleichzeitig minimalem Bauraum.According to the invention, the
Die
Die
Die
Die zylindrische Wandung 22 der Außenwand 21 schließt bündig mit dem zylindrischen Flansch 10 des Gehäuses 2 ab. Gemäß einer in der
Die
Bei einer Darstellung einer Kraft-Weg-Kurve einer derartigen topfförmigen Schutzkappe 5 nimmt die Kraft ab einem bestimmten Weg, die zum Bewegen der Schutzkappe 5 notwendig ist, wieder ab. Die Schutzkappe 5 schlägt dann durch, und nimmt ein niedrigeres Energieniveau an.In a representation of a force-displacement curve of such a cup-shaped
Erfindungsgemäß weist deshalb die Schutzkappe 5, wie in der
Die
Die
Die
Alle Figuren zeigen lediglich schematische nicht maßstabsgerechte Darstellungen. Im Übrigen wird insbesondere auf die zeichnerischen Darstellungen für die Erfindung als wesentlich verwiesen.All figures show only schematic not to scale representations. Incidentally, reference is made in particular to the drawings for the invention as essential.
Claims (3)
- Electromagnetic switch, in particular the starter relay (1), for an electric starter motor for control purposes, in order to bring a starter pinion into engagement during starting of an internal combustion engine, having a housing (2), an armature (3) which can be controlled electromagnetically therein for controlling a control lever (4), and having a flexible protective cap (5) which seals a transition from the housing (2) to the armature (3), the protective cap (5) being of pot-shaped configuration with a pot bottom (6) and a pot opening (7), the pot bottom (6) having a circular opening (16) with a thickened ring (17) for connecting to the armature (3) in a positively locking manner, and the pot opening (7) being of reinforced configuration at the circumferential edge for connecting to the housing (2) in a positively locking manner, the pot bottom (6) having a predetermined bending region as viewed in cross section, characterized in that, as viewed in cross section, the pot bottom (6) of the protective cap (5) has at least two predetermined bending regions in the radial direction, the pot bottom (6) of the protective cap (5) exhibiting a rolling behaviour with round fold formation with at least two fold-overs (28, 29, 30) during a retraction of the armature (3), a counterforce (F) which is generated by the flexible protective cap (5) diminishing briefly with regard to the continuing movement path towards the inside at each fold-over.
- Electromagnetic switch according to Claim 1, characterized in that the pot bottom (6) has three fold-overs (28, 29, 30), two rounded steps (23, 24) being configured in the pot bottom (6) in the radial direction as viewed in cross section, which steps (23, 24) are connected by way of a curved or conical connecting region (25).
- Electromagnetic switch according to either of Claims 1 and 2, characterized in that the circular opening (16) in the pot bottom (6) is configured with a closing and sealing ring (17) which is circular as viewed in cross section.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007053417A DE102007053417A1 (en) | 2007-11-09 | 2007-11-09 | Electromagnetic switch for electric machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2058830A2 EP2058830A2 (en) | 2009-05-13 |
EP2058830A3 EP2058830A3 (en) | 2011-05-18 |
EP2058830B1 true EP2058830B1 (en) | 2016-12-21 |
Family
ID=40340737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08105676.4A Not-in-force EP2058830B1 (en) | 2007-11-09 | 2008-10-28 | Electromagnetic switch for an electrical machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US7973624B2 (en) |
EP (1) | EP2058830B1 (en) |
JP (1) | JP5404005B2 (en) |
DE (1) | DE102007053417A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010003823B4 (en) | 2010-04-09 | 2019-03-28 | Seg Automotive Germany Gmbh | Cover ring for starting device |
DE102014102362A1 (en) * | 2014-02-24 | 2015-08-27 | Norma Germany Gmbh | Connector for a fluid line |
CN105679608B (en) * | 2014-11-17 | 2020-03-13 | 索恩格汽车部件德国有限公司 | Electromagnetic switch and vehicle starter |
FR3054368B1 (en) * | 2016-07-21 | 2020-12-25 | Valeo Equip Electr Moteur | STARTER CONTACTOR INCLUDING A DUST PROTECTION DEVICE, AND STARTER EQUIPPED WITH SUCH A CONTACTOR |
FR3066312B1 (en) * | 2017-05-12 | 2019-06-28 | Valeo Equipements Electriques Moteur | STARTER CONTACTOR COMPRISING A SEALING DEVICE, AND STARTER COMPRISING SUCH A CONTACTOR |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2843593A1 (en) * | 1978-10-06 | 1980-04-17 | Neue Hahn Magnet Gmbh & Co Kg | Miniature AC magnet with low losses and high heat dissipation - has yoke embedded in metallic body with cut=out for excitation coil |
JPS61256706A (en) * | 1985-05-10 | 1986-11-14 | Hitachi Ltd | Solenoid dust cover |
DE3671782D1 (en) * | 1985-09-09 | 1990-07-12 | Nippon Denso Co | SWITCH DEVICE FOR STARTING AN INTERNAL COMBUSTION ENGINE. |
DE3632469A1 (en) * | 1986-09-24 | 1988-03-31 | Bosch Gmbh Robert | ELECTROMAGNETIC SWITCHES, IN PARTICULAR FOR TURNING DEVICES OF INTERNAL COMBUSTION ENGINES |
JPS63280851A (en) * | 1987-05-14 | 1988-11-17 | Nippon Denso Co Ltd | Magnet switch for starter |
NL8801588A (en) * | 1988-06-22 | 1990-01-16 | Philips Nv | METHOD AND APPARATUS FOR VOLUME-SELECTING AN NMR SPECTRUM BY SELECTIVE POLARIZATION TRANSMISSION PULSE SEQUENCES |
JPH0218828A (en) * | 1988-07-06 | 1990-01-23 | Mitsubishi Electric Corp | Electromagnetic aspirator |
JPH02301926A (en) * | 1989-05-17 | 1990-12-14 | Mitsubishi Electric Corp | Electromagnetic attraction device |
DE4242930C2 (en) * | 1992-12-18 | 1998-07-09 | Bosch Gmbh Robert | Engagement relay for starting devices |
DE4432297C2 (en) * | 1994-09-10 | 2002-06-27 | Bosch Gmbh Robert | Engagement relay for starting device for internal combustion engines |
DE19818934C2 (en) * | 1998-04-28 | 2000-07-27 | Karl Kapfer | Switch box with a sleeve or rod-shaped built-in part built into its front panel |
DE10260843B4 (en) | 2002-12-23 | 2020-10-29 | Seg Automotive Germany Gmbh | Relays, in particular starter relays for internal combustion engines |
JP4241300B2 (en) * | 2003-09-29 | 2009-03-18 | 株式会社デンソー | Electromagnetic switch for starter |
JP2005117459A (en) | 2003-10-09 | 2005-04-28 | Nec Electronics Corp | Input circuit |
JP2005174590A (en) | 2003-12-08 | 2005-06-30 | Denso Corp | Electromagnetic switch for starter |
JP4631845B2 (en) * | 2006-12-06 | 2011-02-16 | 株式会社デンソー | Electromagnetic switch for starter |
-
2007
- 2007-11-09 DE DE102007053417A patent/DE102007053417A1/en not_active Withdrawn
-
2008
- 2008-10-28 EP EP08105676.4A patent/EP2058830B1/en not_active Not-in-force
- 2008-11-07 US US12/267,144 patent/US7973624B2/en not_active Expired - Fee Related
- 2008-11-10 JP JP2008288163A patent/JP5404005B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US7973624B2 (en) | 2011-07-05 |
EP2058830A3 (en) | 2011-05-18 |
EP2058830A2 (en) | 2009-05-13 |
US20090128266A1 (en) | 2009-05-21 |
JP2009123698A (en) | 2009-06-04 |
JP5404005B2 (en) | 2014-01-29 |
DE102007053417A1 (en) | 2009-05-14 |
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