EP2483901A2

EP2483901A2 - Toe-in actuator having attenuation

Info

Publication number: EP2483901A2
Application number: EP10767970A
Authority: EP
Inventors: Rainer Stoeckl; Mathias Fein; Sven Hartmann; Martin Mezger
Original assignee: Robert Bosch GmbH
Current assignee: SEG Automotive Germany GmbH
Priority date: 2009-10-01
Filing date: 2010-10-01
Publication date: 2012-08-08
Anticipated expiration: 2030-10-01
Also published as: HUE036556T2; EP2483901B1; EP2483901B8; CN102549700A; DE102010040269A1; WO2011039349A3; CN102549700B; PL2483901T3; WO2011039349A2

Abstract

The invention relates to a toe-in actuator (16), in particular to a relay for an electric starter device in a combustion engine. The toe-in actuator (16) comprises a housing (156), in which a movable armature (168) and an armature return path (171) are accommodated. Noise-reducing attenuation elements (224, 228, 238, 240, 244) are provided at least on the armature (168) and/or on the armature return path (171).

Description

Description title

Toe-in actuator with damping

State of the art

DE 101 24 506 A1 relates to a starter for a motor vehicle. The starter of a motor vehicle with an internal combustion engine contains, inter alia, a pole housing containing the starter motor and an engagement relay arranged in parallel with a magnet switch. Such a starter is particularly in commercial vehicles, off-road vehicles, military vehicles exposed to strong environmental influences, contamination and moisture. Such influences are uncritical for the starter electric motor in the pole housing. In contrast, such influences are very critical in the apply relay, in particular because they can influence the switch for the starter current and the air gap between the magnet armature and the surrounding stator part which is arranged in the apply relay. It is therefore known to provide a seal against such environmental influences on the starter housing. The seal is formed by a rubber membrane connected to the housing walls within the transition region between the pole housing and the engagement relay. Preferably, the rubber membrane is arranged at the pivot point of the engagement lever and molded onto the holder of the engagement lever or to the engagement lever itself.

DE 195 49 179 A1 relates to an engagement relay for a starter. The starting device comprises at least two contact pins, which are bridged in the on state with a contact bridge. This is on a moving

Switching axle attached. The contact bridge has at least two each

Contact pin assigned defined contact areas on, in their

Longitudinal extent and transverse to its longitudinal extension flexible spring arms are provided. The contact areas are arranged on contact lugs, which are produced by bending, embossing or deep drawing of the spring arms in the direction of the contact pins. The spring arms are at least one in the direction of a imaginary, perpendicular to the central axis of the switching axis line extending recess feasible.

In starting devices used today, especially on passenger cars, very high demands are placed on the noise and the life. While previously used starters on passenger cars perform about 40,000 shifts over the life of the vehicle, in today's developments in the Start-Stop Modes (SSM) with the starter up to half a million and more starting cycles are performed. On the one hand, this places considerable demands on the robustness of the starter and, on the other hand, considerable demands on the lowest possible

Noise.

Today's increasingly used SSM functionality reduces the

Fuel consumption of passenger cars in particular for longer holding phases, such as closed railway barriers at a railway crossing or longer red phases at traffic lights. After the end of the break in passenger cars with SSM functionality, the internal combustion engine is restarted by simply tapping the accelerator pedal without the ignition key is pressed. This explains the much higher, about a factor of 10 larger number of starting operations that are performed with the electrically operated starter of the internal combustion engine.

In particular, in passenger cars from the higher-priced sector, are the starter noise, be it at the initial start of the

Internal combustion engine, be it when restarting the

Internal combustion engine in the context of SSM functionality, increasingly as a loss of comfort and bothersome. The indicated technical problem is to be remedied.

Presentation of the invention

According to the invention, it is proposed on an armature of a Vorspuraktuators, be it for example an engagement relay, be it a Einschal Ausschaltrelais, a

Damping device to arrange the noise when actuated of Vorspuraktuators significantly decreases. It has been found that in addition to a stop of an engaging, actuated by the engagement relay hiring a spur gear, in particular a Andrehritzels an electrical

Starting device, another source of noise of the electric machine,

in particular the electrically actuated starter device, by the Vorspuraktuator, be it in use, for example as a contactor, it is given in the use, for example, as Einschal Ausschaltrelais.

Following the solution proposed by the invention, both the

Possibility to provide the moving armature with damping devices, as well as its counterpart, the return core - also called core plate -, with

To provide damping devices. While the return core is stationarily located in the toe-in actuator, the armature moves relative thereto. In manufacturing technology particularly easy to produce manner can be provided in a first embodiment of the present invention proposed damping device on Vorspuraktuator on the mimic end facing a collar, to which a resilient properties exhibiting ring is attached. The ring may be both O-ring-shaped and be made of an elastomeric material or other deformable material having elastic properties. The ring can be arranged on the inside, ie a housing from which the armature extends on actuation, assigning side. Furthermore, it is possible to vulcanize a damping lip instead of an O-ring on the side of the collar facing the housing of the Vorspurakturators. The damping lip may, for example, have a trapezoidal, triangular, rectangular or square cross-section and also be formed from a plastic material or a rubber material having elastic properties. The collar can be formed, for example, by a screwed or cohesively fixed to the front plate or a ring that can be fixed in manufacturing technology particularly simple manner on the front side of the anchor. As a result, manufacturing costs can be saved, since the production of a one-piece federal a complete turning in the way of a Zerspanverfahrens the cylindrical Peripheral surface of the anchor entails, which meant a very expensive manufacturing process.

Alternatively, there is the option of a ring on the perimeter of the anchor

aufzuschrumpfen or to connect the ring with this cohesively, or by means of a positive connection by means of a snap closure.

While the above embodiments of the present invention

proposed to be attributed to the anchor damping devices outside the Vorspuraktuator, in a further embodiment of the

According to the invention proposed solution on the front side of the armature, which has a complementary geometry to the end face of the return core, a

Damping device be provided in the form of a plastic disc or in the form of an O-ring made of elastic material. Both the plastic disc and the inserted into a recess, a groove or a groove, to name a few inserted O-rings attenuate the metallic contact upon actuation of the armature, so that the noise in contact between the end face of the armature and the end face of the return core is significantly reduced. It is irrelevant whether the O-ring or the plastic disc are formed on the end face of the movable armature or on the front side of the return core.

In a further embodiment variant of the solution proposed according to the invention, it is possible to provide damping elements at the return core, which is arranged stationarily in the housing of the relay. In this solution, existing webs are made of plastic material in the material of the return core

injected. Via a suitably configured bore system within the return core, the plastic material flows into the holes and exits at the ends, forming damping cams. Thus, a manufactured in one operation damping device is provided which is formed both on the front side, which assigns the anchor, as well as on the other end of the

Return core, ie the contact bridge of Vorspuraktuators zuweisend, is effective. In development of the proposed solution according to the invention consists

Ability to damp metal contact between a driver located in the armature and a switching axis. This can be done on the

facing each other end faces of the pin-shaped switching axis and the pin-shaped carrier material accumulations of an elastic

Elastomer material having properties, so that the noise is minimized and ideally completely excluded even at this metallic contact surface. Brief description of the drawings

With reference to the drawings, the invention will be described in more detail below.

It shows:

FIG. 1 shows a starting device in a longitudinal section,

Figure 2.1 to 2.4 variants of a first embodiment of the

Damping device on a linearly movable armature,

Figures 3.1 and 3.2 embodiments of a damping device between the

Front side of a linearly movable armature and the front side of the return core, Figure 4 shows a variant of the present invention proposed

Damping device with injected into the return core damping element,

Figure 5 shows a variant of the present invention proposed

Damping device between driver and switching axis of Vorspuraktuators,

Figures 6 and 6.1 a variant of the Vorspuraktuators with at the front of the

Ankers conclusion or the core plate mounted punctiform damping elements, Figures 7 and 7.1 a variant of the Vorspuraktuators with the anchor in

Circumferentially distributed dot-shaped damping elements,

Figure 8 shows a variant of the Vorspuraktuators in the

Anchor conclusion or the core plate embedded in a recess or latched with positive locking damping disc,

9 shows a variant of the Vorspuraktuators, in which an annular

Damper disc is embedded in the armature return opposite end face of the anchor,

FIG. 10 a fastening possibility by vulcanization or sticking of damping elements - here by the example of the armature conclusion,

Figure 1 1 shows a variant of the Vorspuraktuators in the in the

Core plate or the armature circuit is an air cushion having point-shaped damping elements is embedded,

Figure 12 shows a variant of the invention proposed

Vorspuraktuators, in which in a groove on the circumference of

Anchor conclusion having an opening to the atmosphere

Elastomer lip is arranged and

Figure 13 is a longitudinal section through an inventively configured

Vorspuraktuator with perspective view of the openings to the atmosphere having elastomeric ring or hose.

variants

FIG. 1 shows a starting device 10 in a longitudinal section.

This starting device 10 has, for example, a starter motor 13 and a

Vorspuraktuator 16 (eg relay, starter relay) on. The starter motor 13 and the electric Vorspuraktuator 16 are attached to a common drive end plate 19. The starter motor 13 is functionally to drive a starter pinion 22 when it is in

Sprocket 25 of the internal combustion engine, not shown in Figure 1 is eingespurt. 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. 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. At the end of the drive shaft 13 facing away from the starting pinion 22, a commutator 52 is furthermore mounted, which is constructed, inter alia, from individual commutator bars 55. The commutator bars 55 are so electrically connected in a known manner with the armature winding 49, that upon energization of the commutator fins 55 by carbon brushes 58, a rotational movement of the armature 37 within the pole tube 28 results. A arranged between the electric drive 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 13 is commutator side supported with a shaft journal 64 in a sliding bearing 67, which in turn is held stationary in a Kommutatorlagerdeckel 70. Of the

Commutator bearing cap 70 in turn is fastened by means of tie rods 73, which are distributed over the circumference of the pole tube 28 (screws, for example two, three or four pieces) in the drive end shield 19. It relies while the pole tube 28 am

Drive bearing plate 19 from the commutator and 70 on the pole tube 28th

Viewed in the drive direction connects to the armature 37, a sun gear 80, which is part of a planetary gear 83, in particular a planetary gear. The sun gear 80 is surrounded by a plurality of planetary gears 86, usually three planet wheels 86, which are supported by means of rolling bearings 89 on journals 92. The planet gears 86 roll in a ring gear 95, which is mounted outside in the pole tube 28. Toward the

On the output side, the planetary gears 86 are adjoined by a planet carrier 98, in which the axle stubs 92 are received. The planet carrier 98 will turn in one

Intermediate storage 101 and a slide bearing 104 arranged therein. The

Intermediate storage 101 is designed pot-shaped, that in this both the

Planet carrier 98 and the planet wheels 86 are added. Furthermore, the ring gear 95 is arranged in the cup-shaped intermediate bearing 101, which is ultimately closed by a cover 107 relative to the armature 37. Also, the intermediate bearing 101 supports with its outer circumference on the inside of the pole tube 28 from. The armature 37 has on the end remote from the commutator 52 end of the drive shaft 13 another

Shaft 1 10 on, which is also included in a plain bearing 1 13. The

Slide bearing 1 13 in turn is in a central bore of the planet carrier 98th

added. The planet carrier 98 is integrally connected to the output shaft 1 16. The output shaft 1 16 is supported with its end facing away from the intermediate bearing 101 end 1 19 in a further bearing 122, which is fixed in the drive end plate 19.

The output shaft 1 16 is divided into several sections. Thus, the section which is arranged in the sliding bearing 104 of the intermediate bearing 101, a section with a

Spur gear 125 (internal toothing), which is part of a shaft-hub connection 128. This shaft-hub connection 128 in this case allows the axially rectilinear sliding of a driver 131. The driver 131 is a sleeve-shaped extension which is integrally connected to a cup-shaped outer ring 132 of the Feilaufs 137. This freewheel 137 (Richtgesperre) further consists of the inner ring 140 which is disposed radially within the outer ring 132. Clamping elements 138 are located between inner ring 140 and outer ring 132. Clamping elements 138, in cooperation with inner and outer rings 132, 140, prevent relative rotation between outer ring 132 and inner ring 140 in a second direction. In other words, the freewheel 137 allows a circumferential relative movement between the inner ring 140 and the

Outer ring 132 only in one direction. In this embodiment, the inner ring 140 is integral with the starter pinion 22 and its helical teeth 143

(External helical teeth) executed. The starter pinion 22 may alternatively be designed as a straight toothed pinion. Instead of electromagnetically excited pole pieces 31 with exciter winding 34, permanent magnetically excited poles could also be used.

The electric Vorspuraktuator 16 and the armature 168 also has the

Task, with a tension member 187 to move in the drive bearing plate 19 rotatably arranged lever 190 to move. The lever 190 is usually designed as a fork lever and engages with two "tines" not shown here, two discs 193, 194 on its outer periphery to move a trapped between these driver ring 197 to the freewheel 137 back against the resistance of the spring 200 and thereby the Andrehritzel 22 einzuspuren in the ring gear 25. Subsequently, the Einspurmechanismus will be discussed. The electric Vorspuraktuator 16 has a bolt 150 which is an electrical contact and in the case of Einbausein in the vehicle to the positive terminal of an electric starter battery, which is not shown in Figure 1, is connected. The bolt 150 is passed through a lid 153. A second bolt 152 is a connection for the electric starter motor 13, which is supplied via the power supply 61 (thick wire). The lid 153 includes a housing 156 made of steel, which is secured by means of a plurality of fastening elements 159, which may be formed, for example, as screws on the drive end plate 19. In the electric Vorspuraktuator 16 is a pusher 160 for exerting a pulling force on the lever 190, designed as a fork lever, and a switching device 161 is arranged. The pusher 160 has a winding 162 and the switching device 161 another winding 165. The winding 162 of the pusher 160 and the further winding 165 of the switching device 161 each cause in the on state an electromagnetic field which flows through various components. The shaft-hub connection 128 may instead of a spur 125 also with a

Steep thread toothing be equipped. The combinations are possible, according to which a) the starter pinion 22 is helically toothed and the shaft-hub connection 128 has a straight toothing 125, b) the starter pinion 22 is helically toothed and the shaft-hub connection 128 has helical tooth toothing or c) the starter pinion 22 is spur-toothed and the shaft-hub connection 128 is a

Has steep thread toothing.

The figure sequence of Figures 2 to 2.4 are embodiments of the

According to the invention proposed damping elements.

A Vorspuraktuator, in particular a relay for actuating an electric starter device for internal combustion engines on an enlarged scale emerges from the illustration in FIG. FIG. 2 shows that the toe-in actuator 16 comprises a housing 156, in which a linearly movable armature 168 moves in the feed direction 226 when the pull-in winding 162 or the holding winding 165 is energized. The armature 168 which can be actuated in the axial direction in the feed direction 226 is adjoined by an armature return 171, which is also referred to as a core plate. The front side of the movable in the housing 156th

received armature 168 opposite end face of the armature circuit 171 is complementary to this. In the armature circuit 171 is a

Switching pin 177 arranged, which is mounted in a guide bush 202. At the guide bush 202 is an insulating 204 and a

Switching axis stop 206, which limits the path of the shift pin 177. An end face of the indexing axis 171 is designated by reference number 214, which is opposite to an end face 212 of a carrier 210 arranged in the armature 168. Reference numeral 184 denotes a contact bridge which, when energized, is connected to the bolt 150 and the power supply 61 and conductively connects them to one another. The contact bridge 184 is acted upon by a contact spring 208.

In the embodiment of the invention shown in FIG

proposed here on the outside of the armature 168 trained

Damping device, is shrunk onto a jacket surface 218 of the armature 168, a shrink ring 219, on which a damping ring 224 of plastic material, such as PA, TPE or a thermoplastic is supported. Alternatively, a lip of plastic material can also be vulcanized or otherwise fastened to the shrink ring 219. When energizing the Vorspuraktuators 16 and the subsequent retraction of the armature 168 in the feed direction 226 an undamped metallic contact between the end faces of the facing armature 168 is prevented with the armature circuit 171, as previously the damping element 224, formed here in ring form, abuts the housing 156 and so the noise of the Vorspuraktuators 16 when it is actuated, either during the engagement process, be it when initializing turn on, significantly reduced. Preferably, the material from which the damping element 224, here formed in a ring shape, is made, has a Shore hardness of between 10 and 70.

FIG. 2.1 shows a further embodiment variant of the damping device proposed according to the invention.

Instead of a shrunk onto the lateral surface 218 of the armature 168 ring here a disc 222 is attached to an end face 220 of the armature 168. The

Attachment can be done either by screws, by riveting or by cohesive joining methods. The diameter of the disc 220 is selected so that this the diameter of the lateral surface 218 of the armature 168th exceeds. Thus, the difference in diameter forms a ring-shaped on the end face 220 of the armature 168 extending support surface on which the damper ring 224 shown in Figure 2.1 is supported. In the armature 168, which is only partially shown in the representation according to FIG. 2.1, the driver 210 (see illustration according to FIG.

FIG. 2.2 shows a further embodiment variant of the damping device, in which, analogously to the representation according to FIG. 2.1, a sealing lip 228 made of plastic material or elastomer material is vulcanized or fixed in some other way on the front side 220 of the linearly movable armature 168. The disk 220 has a

Diameter, which exceeds the outer diameter of the lateral surface 218 of the armature 168 and so forms an annular surface on which the damper lip 228 can be vulcanized, for example. Both the damper ring 224 and the damper lip 228 are the pole housing 156, see. Representation of Figure 2, opposite, so that upon actuation of the armature 168 and its retraction into the housing 156, the noise is optimized because a hard metallic contact of the components 168 and 171 is prevented.

In the embodiment according to Figure 2.3 it can be seen that in this

Embodiment variant of the armature 168 has an integrally formed with this collar 230. The collar 230 can be realized, for example, by machining the lateral surface 218 of the armature 168. The collar 230, which extends along the end face 220 of the relay armature 168, forms a support surface for the damper ring 224, which is preferably made of material having classic properties with a Shore hardness between 10 and 70.

Instead of the damper ring 224 shown in the embodiment according to FIG. 2, the damper lip 280 can also be provided on the collar 230 on the side facing the pole housing 156.

In the embodiment according to FIG. 2.4, the armature 168 has a threaded section on the front side 220, on which, for example, a sleeve 232 having an internal thread can be screwed on. The sleeve 232 is designed such that, with its outer diameter, it has the outer diameter of the lateral surface 218 of the armature 168, as shown in the illustration according to FIG. exceeds. After applying the sleeve 232 on the front side 220 of the armature 168 this is fixed and forms with its radial projection a support surface for the damper ring 224, as indicated in the illustration of Figure 2.4, or an annular space within which a damper lip 228, as shown in FIG 2.2 indicated, vulcanized or otherwise secured. FIG. 2.4 shows that the carrier 210 extends through the linearly movable armature 168.

While in the embodiment variants of FIGS. 2 to 2.4, the damping devices proposed according to the invention are located outside of the toe actuator 16, in particular on the front side 220 or the lateral surface 218 of the armature 168, in FIG. 3.1 a variant embodiment according to the invention

suggested damping device, which is located in the interior of the housing 156. FIG. 3.1 shows that in this embodiment variant of the invention

proposed solution on the front side of the armature 168, which assigns the armature yoke 171, a damper ring 224 is attached. The damper ring 224 may be arranged in a recess 236 on the front side of the armature 168 facing the armature return 171 or may also be received on an oblique contour. For example, a groove, a groove or the like can be formed as a recess in the front side. The Vorspuraktuator 16 as shown in Figure 3.1, of which only one half is shown, has the contact spring 208, which acts on the contact bridge 184. The guide bushing 202 surrounds the switching pin 177, which lies opposite the driver 210 of the armature 168.

In a modification of the embodiment shown in Figure 3.1, where the damper ring 224 a plan side 234 opposite in the armature circuit 171, the

Damper ring 224 may also be included in the plan side 234 of the stationary in the Vorspuraktuator 16 armature circuit 171. In both

Embodiments ensures that a hard metallic contact between the plane side 234 and the opposite side of the plano of the armature 168 upon actuation of the Vorspuraktuators 16, the energization of the windings 162, 165 is avoided, so that the noise during actuation of the

Vorspuraktuators 16 is drastically reduced. Again, it is possible to attach the damper ring 224 on an oblique contour. In the embodiment according to Figure 3.2 is in a modification of

Embodiment according to Figure 3.1 on the front side of the armature 168, which is opposite to the armature circuit 171, at least one plastic disc 238 arranged. This is the plan side 234 of the armature circuit 171 opposite. Even with the embodiment shown in Figure 3.2, it is possible to arrange the at least one plastic disc 238 instead of on the front side of the armature 168 within the plan side 234 of the armature circuit 171. Instead of the plastic disc 238 shown in Figure 3.2, depending on

Damping requirement also several plastic discs 238 can be combined into one package. It is possible, the plastic discs 238 made of different materials with different hardnesses

vulcanize or otherwise connect to each other, so that the required damping characteristics can be accommodated individually by assembling the packages of plastic discs 238.

In the embodiment according to Figure 3.2, the Vorspuraktuator 16 is also shown only half. The armature return 171 and the linearly movable armature 168 are enclosed by the housing 156. Also in the embodiment according to Figure 3.2, the switching pin 155 is surrounded by the guide bushing 202, the one

Insulating washer 204 and a switching axis stop 206 is assigned. The switching pin 177 is acted upon by the contact spring 208, with reference numeral 61 is analogous to the representation of Figure 1 denotes the power supply. FIG. 4 shows a variant of the proposed invention

Device in which the at least one damping element is provided in the armature circuit 171.

According to this embodiment variant, the armature return 171 has a channel system 242 into which a damper material 240 having elastic properties can be injected. Due to the extension of the channel system 242 within the armature yoke 171 is ensured that the elastic properties having plastic material from openings of the channel system at the

Contact bridge 184 facing end exit, as well as in the area of the plan side 234 at the armature circuit 171 exits from this. With one and the same Injected damper material 240 now punctiform damper stops on both ends of the armature yoke 171 can be made. As indicated in the illustration according to FIG. 4, the injected plastic material 240 projects slightly over the plane side 234 of the armature return 171 or slightly over the top side

Front side of the armature circuit 171 on the contact bridge 184 facing side, so that both the metallic stop the front side of the armature 168 damping support points in the plan side 234 and the stop of a

Contact bridge 184 damping stop points on the contact bridge 184 facing end side of the armature circuit 171 are generated.

The Vorspuraktuator 16 shown in Figure 4 substantially corresponds to the Vorspuraktuator shown in Figure 2.

FIG. 5 shows a further embodiment variant of the damping device proposed according to the invention.

In addition to the possibility in a Vorspuraktuator 16 the anchor 168 or the

Anchor conclusion 171 to be provided with damping elements or to introduce a damping material in said components, a reduction of the operating noise on Vorspuraktuator 16 also be achieved that a direct contact of the metallic components driver 210 and shift pin 177 is prevented by damping elements. As can be seen from the illustration according to FIG. 5 and moreover from the illustration according to FIG. 4, the end face 212 of the driver 210 and the end face 214 of the switching pin 177 lie opposite each other. In metallic contact between the two end faces 212 and 214, the resulting noise level can be reduced by the fact that on one of the end faces 212 and 214 of the genanten components shift pin 177 and driver 210, a damper head 244 of an elastic properties

having applied material. Preferably, the damper head 244 is slightly rounded, but may also be designed plan. Instead of a single-layer damper head 244, as shown in the illustration of Figure 5, this may also have a multi-layered layer structure.

The proposed solution according to the invention allows a drastic reduction of the noise level upon actuation of a Vorspuraktuator 16 by damping or Energy dissipation relative to each other moving components, be it the linearly movable relay armature 168 or be it the stationary received in the housing 156

Anchor conclusion 171. In addition, it is possible by the proposed solution according to the invention, the metallic contact between the end face 212 of the driver 210 and the

Front side 214 of the shift pin 177 to dampen.

Upon realization of all measures, i. the damping and energy dissipation of the armature 168 and the armature circuit 171 and the switching pin 177 and the driver 210, the noise level can be reduced when operating the Vorspuraktuators 16 extent that in the SSM functionality no loss of comfort due to noise of the Vorspuraktuators 16 and thus with the

Vorspuraktuator 16 equipped electrical starter occurs.

Referring to Figures 6 and 6.1, a Vorspuraktuator can be seen at the

Ankerrückschluss punctiform circumferentially distributed damping elements are arranged. FIG. 6 shows the housing 156 in which the pull-in winding 162 and the holding winding 165 are integrated. The end face of the linearly movable armature 168 is designated by reference numeral 220. Inside the linearly movable armature 168 is the driver 210. The stationary recessed into the housing 156 anchor yoke 171, which also as

Core plate is designated at its the linearly movable armature 168 facing end face with punctiform circumferentially arranged damping elements 250 is provided. From the figure 6.1 shows that the point-shaped

Damping elements 250 may be included in a 45 ° pitch on the circumference of the linearly movable armature 168 facing end side of the armature yoke 171. By in one or more circularly arranged damping elements 250, the surface can be selected selectively. The area size is decisive on the

Damping characteristic involved. The shape of the damping element 250 need not necessarily be punctiform, it can also oval shapes or certain

Be partial surfaces. Furthermore, it is also possible, the damping elements 250 in to arrange a different circumferential pitch than the above-mentioned 45 ° pitch. Damping elements 250 can also be arranged lowered. By lowering the damping elements 250 can be achieved that at the first moment of the

Upon impact of the linearly movable armature 168, the armature speed and thus the resulting noise is reduced. This is the case in particular when the elastomers used as damping elements 250 have a very high dynamic

Have compressive strength. As soon as the dynamic part of the damping process comes to an end, the strength reduces from a dynamic strength to a static strength. This transition effect is used selectively, since the distance between the movable armature 168 and the armature return 171 has a great influence on the amount of electricity required. By lowering the damping elements 250 or the formation of an open space, the distance between the armature 168 and the armature circuit 171 is significantly lower, so that the adjusting current flow increases. The illustration according to FIG. 6.1 represents a section through the toe-in actuator 16 according to the illustration in FIG. 6 in the area of the switching pin 177 or the indexing axis 177, the linear progression between the conical elevation of the armature return 171 and the conical depression complementary thereto movable armature 168 runs.

In the embodiment according to the figures 7 and 7.1, a reverse arrangement of the punctiform damping elements is shown on Vorspuraktuator, namely on the opposite side of the armature return end of the linearly movable armature. In reversal of the embodiment of Figures 6 and 6.1 described above is located in the embodiment, which is shown in Figures 7 and 7.1, the punctiform arranged in a 45 ° distribution damping elements not on

Ankerrückschluss 171, which is also referred to as a core plate, but at this opposite end face of the linearly movable armature 168. Analogous to the

Embodiment of the Vorspuraktuators 16 according to Figures 6 and 6.1, the housing 156 comprises a cover 153, in which the bolt 150 and the power supply 61 are located, on each of which contacts 180 and 181 are formed. The armature circuit 171, which is also referred to as a core plate, is traversed by the driver 177; in the

Anchor conclusion 171, the guide bush 202 is added. The embodiment according to FIG. 8 shows a toe-in actuator 16, in which a damping disk 252 is accommodated in a recess 254 on the front side of the armature return 171. Instead of a plane-shaped end face, the damping disk 252 may also be accommodated on an inclined surface on the armature return 171. The damping disk 252 extends completely over the entire end face of the armature yoke 171. The radial position of the damping disk 252 is selected such that it faces the front side portion of the linearly movable armature 168, otherwise struck unattenuated with hard metallic contact on the armature circuit 171 causing a noise.

FIG. 9 shows a variant of the proposed invention

Vorspuraktuators 16, which also includes a ring-shaped damper disc 252, which is included in this embodiment, however, in an annular recess 254 on the front side of the linearly movable armature 168 which 16 moves on actuation of the Vorspuraktuators 16 on the armature circuit 171. By the damper plate 252, which is embedded in the recess 254, a hard metallic striking of the linearly movable armature 168 at the armature circuit 171, which is also referred to as core plate prevented. The damper disk 252 may also be received on an inclined surface on the linearly movable armature 168. Also in the above sketched

Embodiment variant, it is possible to mount the damper plate 252 in a reduction, so that at the first moment of impact of the linearly movable armature 168 whose speed and thus the resulting noise is reduced. This is the case in particular when the elastomers used have a high dynamic compressive strength. When the dynamic process goes into a static process, the strength of dynamic strength reduces to static strength. This effect can be used, for example, to minimize the distance between the linearly movable armature 168 and the armature return 171, since this distance has a large influence on the amount of electricity required. The smaller the distance between the linearly movable armature 168 and the armature return 171, the greater the self-adjusting current flow.

The in the two embodiments according to Figure 8 and Figure 9 shown

Embodiments of the Vorspuraktuators 16 have both in the housing 156 embedded pull-in windings 162 and holding coils 165. Both the driver 177 as well as the contacts 180, 181, the bolt 150 and the power supply 61 together Contact spring 208 are identical. The two variants shown in Figure 8 and Figure 9 differ only by the different position of the annular damper disc 252, either received on the front side of the linearly movable armature 168 or received on the front side of the linearly movable armature 168 opposite armature yoke 171st

FIG. 10 shows part of a variant of a toggle actuator 16 proposed according to the invention, in which the damping element 250 or 252, for example, directly on the armature return 171 or the core plate by locking lugs,

Snap closures of a positive contour can be positioned. The attachment of the damping element 250, 252, be it formed as a point-shaped damping element 250, be it a damper plate 252, can also take place via locking lugs or in a wedge shape, wherein the location of the attachment, i. the component is significant; This can be both the armature circuit 171, which is also referred to as a core plate act, or on the in the housing 156 of the Vorspuraktuators 16 linearly movable

received anchor 168.

Figure 1 1 shows a further embodiment of the damping device on

Vorspuraktuator 16. As can be seen from Figure 1 1, either on the front side of the linearly movable armature 168 or on the opposite end face of the

Ankerrückschlusse 171 (core plate) a damping element 258 may be arranged with an air entrapment. The shape of the damping element 258 with entrapped air can be circular, oval, rectangular, trapezoidal, over the complete component or over part of a circumferential segment of the component, be it the linearly movable armature 168, be it the armature return 171. The damping element 258 is molded from an elastomer such that it itself provides an open space, i. an adjusting distance between the linearly movable armature 168 and the

Anchor conclusion 171 is also as small as possible, which can improve the flow of current.

In the embodiment variant shown in FIG. 11, an additional damping effect is achieved by the air cushion enclosed in the damping element 258.

The illustrations according to FIGS. 12 and 13 show a further embodiment of the damping device provided on the toe-in actuator. FIG. 12 shows that the armature return 171, which is also referred to as a core plate, has a recess 266 on its end face, which lies opposite the linearly movable armature 168. Within the recess extends a support rib 264 in the circumferential direction, at which a damping ring 260 extends with air inclusion and openings to the atmosphere. The rear side of the wedge-shaped profiled damping ring 260 is supported by the raised from the recess 266 circumferential rib 264. The damping ring 260 is made of elastomer and due to the air cushion contained therein has a high damping effect when the armature 168 strikes this damping ring 160. During the dynamic process of the retraction movement of the linearly movable armature 168, the compressed air escapes through openings to the atmosphere, the provided on the damping ring 260 made of elastomeric material. Through this

adaptive suspension over the elastomer is the necessary holding force of the

Vorspuraktuators 16 reduced after the pulling movement, but a high damping effect can be achieved.

The illustration according to FIG. 13 shows the toe-in actuator 16 in toto, clearly recognizable is the damping ring 260, which is located outside the conical projection on the

An armature return 171 is provided on the front side, which is the linearly movable armature 168 which receives the driver 210, opposite.

For the sake of completeness, it should be mentioned that in the illustration according to FIG. 13, the housing 156 also includes the cover 153, in which the power supply 61 and the bolt 150 are accommodated. The bolt 150 is connected to the contact 180, the power supply 61 to the contact 181. In the embodiment variants according to FIGS. 12 and 13, it is possible to enable the positioning of the component only by changing the contour of the armature return 171. The recesses 266, which are formed for example on both sides of the support rib 264, allow the already mentioned several times dynamic effect when braking the linearly movable armature 168th Die

Recesses 266 may also be formed in other contours than the geometries shown in FIGS. 12 and 13.

Claims

claims

1 . Vorspuraktuator (16), in particular relay for an electrical

A starting device for an internal combustion engine, comprising a housing (156) in which a movable armature (168) and an armature return (171) are accommodated, characterized in that at least the armature (168) and / or the

Anchor conclusion (171) noise reducing damping elements (224, 228, 238, 240, 244, 250, 252, 258) are provided.

2. Vorspuraktuator (16) according to claim 1, characterized in that the armature (168) frontally (220) or on a lateral surface (218) is associated with a disc (230, 232) with a radial projection, which supports a damper ring (224) ,

3. Vorspuraktuator (16) according to claim 2, characterized in that on the disc (230, 232) a damper lip (228) molded, vulcanized, glued or positively received is added.

4. Vorspuraktuator (16) according to claim 1, characterized in that a collar (230) on the lateral surface (218) of the armature (168) is formed on which a damping ring (224) or a damping lip (228) are supported.

5. Vorspuraktuator (16) according to claim 1, characterized in that as a damping ring (224) or at least one plastic disc (238) formed damping element is attached to one of the armature return (171) facing end side of the armature (168).

6. Vorspuraktuator (16) according to claim 1, characterized in that as a damping ring (224) or at least one plastic disc (238) formed damping element on a plan side (234) of the armature return (171) is added.

7. Vorspuraktuator (16) according to claim 1, characterized in that a resilient properties exhibiting damping material (240) in a channel system (242) of the armature return (171) is introduced.

8. Vorspuraktuator (16) according to claim 1, characterized in that the elastic properties exhibiting damping material (240) from openings of the channel system (224) on the front sides of the armature return (171) emerges and forms an energy dissipation favoring and noise-reducing attachment points.

9. Vorspuraktuator (16) according to claim 1, characterized in that a damper head (244) made of plastic material or rubber on an end face (212) of a driver (210) or on an end face (214) of a shift pin (177) is mounted.

10. Vorspuraktuator (16) according to claim 1, characterized in that the damping elements (224, 228, 238, 240, 244) made of PA, thermoplastics, TPE or rubber with a Shore hardness between 10 and 70 are made.

1 1. Vorspuraktuator according to claim 1, characterized in that the damping elements (224, 228, 238, 240, 244) are trapezoidal, oval or semicircular or formed as a circle segments.