WO2012101223A2

WO2012101223A2 - Starter device for internal combustion engines

Info

Publication number: WO2012101223A2
Application number: PCT/EP2012/051249
Authority: WO
Inventors: Thomas Botzenhard; Stephan Kaske; Claus Kramer; Roman Pirsch; Hans-Dieter Siems; Javier Bores; Uwe VON EHRENWALL
Original assignee: Robert Bosch Gmbh
Priority date: 2011-01-26
Filing date: 2012-01-26
Publication date: 2012-08-02
Also published as: RU2013139236A; DE102011003200A1; HUE048743T2; EP2668395A2; EP2668395B1; BR112013018162B1; DE102011003200B4; CN103339372B; RU2607435C2; WO2012101223A3; CN103339372A; BR112013018162A2

Abstract

The invention relates to a starter device (10) for an internal combustion engine and comprises a toe-in actuator (16). The latter actuates a lever (190), by means of which a cranking pinion (22) is moved into or out of a gear ring (25) of the internal combustion engine. A pretensioned element (212) is held on the lever (190; 202, 204). The pretensioned element (212) is actuated by the toe-in actuator (16). A spring force (228, 234) acting in the inward movement direction is applied to the cranking pinion (22, 143) via a lever section (202, 204) of the lever (190).

Description

Description title

Starting device for internal combustion engines State of the art

DE 1 268 433 relates to a starter motor for internal combustion engines

Engaged drive. To move the thrust screw a rigid stamped out of a sheet lever is used, which partially comprises a bearing pin with a curved central portion and is pivotally mounted about this bearing pin. An inserted in a recess of a housing cylindrical compression spring pushes the lever against the bearing pin. At one end of the lever engages a pull rod of a

Magnetic switch on, while the other end of the lever is fork-shaped.

DE 29 15 062 A1 has an electric starter for an internal combustion engine to the object. To ensure the installation of the pinion teeth of a pinion gear in the teeth of a ring gear of the internal combustion engine, a spring element is used. The spring element comprises two helically shaped middle parts, the

are wound opposite to each other and connected by means of a middle loop. Each of the two helically shaped central parts each has an extension in the form of a straight arm, wherein the helically shaped, central parts of the spring are provided with holding means. The straight arms of the two helically shaped middle parts c ensure the return action, while the middle loop represents a spring-trained, receding support point for a control lever of the drive. DE 33 17 071 A1 relates to a fork of an electric starter for

Internal combustion engines. A fork arm and a leg of the fork are mutually movable and mounted on a common bolt. The two parts, ie the fork arm and the leg of the fork, are connected to each other elastically via a spring. The top of the fork arm and the leg comprise the axle at the core of a starter switch. The fork can be made of plastic or metallic material and allows a shorter version of the starting device according to DE 33 17 071 A1 and simplifies its construction.

DE 10 2007 061 106 A1 relates to a starter for an internal combustion engine and to a method for assembling a starter. The starter comprises an output shaft driven by a starter motor which carries a meshing device movable in the axial direction of the output shaft. It is provided for starting the internal combustion engine by means of a starter relay pivotable, two-armed executed engagement lever having a first and a second lever arm, wherein the first lever arm with a form-locking parallel to the axis of the output shaft movable in the actuator of the starter relay and the second lever arm with a driver the Einspurvorrichtung is engaged. The first lever arm can be brought by inserting a part of the actuator in a recess of the first lever arm and by a subsequent relative movement of the actuator and the engagement lever transversely to the axis of the output shaft form-fitting manner with the actuator in engagement.

Preferably, the actuator is made of plastic material.

DE 697 04 094 T2 relates to a starter with an improved drive and rear part of a Andrehritzels. The starter includes an electric

Starter motor, an output shaft, by means of the starter motor by a

One-way clutch is driven, which in turn is provided for transmitting a rotation in one direction only. Further, the starter includes a pinion moving member which is movably mounted on the output shaft and is engageable in a ring gear of the planetary gear of the motor, further comprising a solenoid switch and a

A pinion pressure device having a lever which cooperates with the electromagnetic switch at one end. The pinion moving member is movable in an axial direction relative to the one-way clutch. It is a ball bearing provided to be driven by means of the solenoid switch by the lever for advancing and for moving back the pinion movement member axially toward and from the ring gear of the planetary gear, wherein the ball bearing an inner ring, with the

Pinion moving member is engaged, an outer ring, which is engaged with the lever and a bearing ball, which is arranged between the rings to cause only the inner ring to rotate with the pinion moving member comprises. In the development of new starter generations for internal combustion engines is sought to shift a freewheeling function of the starting device in a planetary gear, in particular in a planetary gear. This development direction is also referred to as fixed freewheel. Thereby, the mass to be moved by the Vorspuraktuator, such as a Einrückmagneten an engagement relay can be reduced, so that the Vorspuraktuator can be made smaller in this case. This in turn causes the problem that the Einspurfeder no longer by the freewheel against too high

Speed can be protected, and at high speeds may be destroyed by the centrifugal forces occurring. For this reason, the pressing action realized by the Einspurfeder which acts on the starter pinion to be moved to another location within the starter device.

In the solution known from DE 697 04 094 T2, which relates to a starter with an improved drive and return device for the starter pinion, a fork lever is provided with a double leg spring made of spring wire, so the function of fork lever and Einspurfeder in one component to unite. According to this solution, a preload which is to be generated via the fork lever, can not be readily ensured. When clamping the used in this solution

Double leg spring spring consists of the problem that an inner diameter of a pivot pin is smaller and at a storage of the fork lever exactly at this

Make by means of a pin or an axis a reduction of the mandrel diameter prevents the function of the double leg spring. Furthermore, the occurring wear of the spring wire by high speed of Andrehritzels is very high, so that the required according to specifications life of the starting device can not be guaranteed.

In a new generation of starting devices for internal combustion engines, the function that has previously taken over the freewheel, shifted in a planetary gear, especially in a planetary gear. In this context, it is spoken of a fixed freewheel. As a result, the masses that are moved by the Vorspuraktuator can be reduced, so that overall seen the Vorspuraktuator can be designed smaller. With this construction, however, the problem arises that the previously used Einspurfeder will not be protected by the freewheel gear during starter overhauling and will be destroyed by the above-outlined centrifugal forces. For this reason, remedy is to be created in that the tracking spring function is moved to another location. Presentation of the invention

According to the invention, it is proposed that for the actuation of the Andrehritzels, i. to be provided with an integrated biasing spring element when engaging the Andrehritzels in the ring gear of the internal combustion engine used lever, wherein at least one leg of this biasing member is actuated directly via a tension element of the Vorspuraktuators. In an advantageous embodiment of the proposed solution according to the invention, the biasing spring element, in particular designed as a double leg spring. Such a trained biasing spring element comprises a first spring leg, which is moved directly by a tension element of the Vorspuraktuators and at least one further second spring leg, in turn, an inside of the preferred as

Actuated injection molded component manufactured lever, in particular biases in the direction of engagement of Andrehritzels in the ring gear of the internal combustion engine. The

in particular designed as a double leg spring biasing spring element is installed in a spring receiving space formed on the one hand by side walls of the lever preferably made of plastic injection molded component, on the other hand by a guide of the lever and a cam to the outside of the lever

Recesses in a bearing block, added.

Due to the fact that the double leg spring has a first winding section and a second winding section each having a plurality of spring coils, the double leg spring can be mounted in the spring receiving space on side walls, in particular on fixing elements or latching noses embossed thereon.

This can be avoided in an advantageous manner that an axle or a mandrel or the like, which passes through the limited by the spring coils of the spring coil sections interior. This in turn favors the function of the double-leg spring, since upon application of the same a contraction of the individual walls of the

Windungsabschnitte takes place and - since the interior of Wndungsabschnitte is free of internals, a largely unrestricted or uninhibited function of the

Biasing spring element is ensured. By inventively proposed solution of a lever with integrated, preferably designed as a double leg spring biasing element, on the one hand its function can be achieved without the at least a Windungsabschnitt at a compression by this, ie actuation of the biasing spring element, in particular designed as a double leg spring, a

Diameter reduction undergoes and on at least one

Winding section passing mandrel or an axis passing through this would set due to the diameter reduction.

In particular, the inventively proposed lever with integrated

Preload element by molded on the outside of the lever one

Ensures pivoting favoring cam. These, the axis of rotation of the inventively proposed fork lever with integrated biasing spring element forming cam, are mounted in recesses at least partially enclosed, which are formed on a spring receiving space of the lever facing end side of a bearing block. Tolerances for different lever positions, in particular fork lever positions, can be easily compensated and tolerated by the solution proposed according to the invention. The inventively proposed lever for actuation, i. for meshing the Andrehritzels in the ring gear of the internal combustion engine, has a first lever portion which comprises a guide in which a first spring leg of the

Preload element is guided. In addition, the invention proposed, in particular manufactured as a plastic injection molded part lever on a second lever portion. The second lever portion serves on the one hand as a contact surface for at least one second spring leg of preferably designed as a double leg spring

Biasing spring element. The manufactured as a plastic injection molded part lever is formed within the second lever portion as a fork lever. On the inside of the two fork-like configured lever arms of the second lever portion are locking lugs, which engage in a circumferential groove which is formed on an end face of the Andrehritzels. This advantageous embodiment ensures that the starting pinion always with the lever, in particular designed as a fork lever second

Lever section is connected, i. on actuation of Vorspuraktuators a

Axialbewegung of Andrehritzels is ensured due to the permanent engagement between the locking lugs and the circumferential groove. Brief description of the drawings

1 shows a longitudinal section through the starting device, Figure 2 shows the mounting of the fork lever on a bearing block,

3 is a cutaway view of lever, biasing member and bearing block,

Figure 4 is a perspective plan view of the particular as a fork lever

trained lever with integrated spring element,

5 shows a section through the perspective view according to Figure 4,

Figure 6 is a perspective view of the fork lever as shown in Figure 4 with the bearing block omitted and showing the built-in

Biasing spring element,

Figure 7, in particular the lever designed as a fork lever in a rest position, Figure 8, in particular designed as a fork lever lever in one

Voreinspurposition,

FIG. 9 shows the lever designed in particular as a fork lever in a tooth-on-tooth position,

Figure 10 is a perspective view of the particular designed as a fork lever

lever,

Figure 1 1 is an illustration of the lever designed in particular as a fork lever according to

FIG. 10 with the spring element omitted,

Figure 12 is a sectional view of the lever and bearing block with representation of a

Spring receiving space, Figure 13 shows a first embodiment of the lever storage and Figure 14 shows a further embodiment of the lever storage. variants

The illustration according to FIG. 1 shows a longitudinal section through a starting device for an internal combustion engine.

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

Vorspuraktuator 16, which is designed for example as a relay, in particular as a starter relay. The starter motor 13 and the electric Vorspuraktuator 16 are fixed to a common drive end plate 19. The starter motor 13 functions to drive a starter pinion 22 when it is meshed with a ring gear 25 of an internal combustion engine not shown in FIG.

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 results in energizing the commutator fins 55 by carbon brushes 58, a rotational movement of the armature 37 in the pole tube 28. One between the Vorspuraktuator 16 and the

Starter motor 13 arranged power supply 61, supplied 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. Of the

Commutator bearing cap 70 in turn is by means of tie rods 73, which extends over the circumference of the

Polrohrs 28 are arranged distributed (screws, for example, two, three or four pieces) in the drive end plate 19 attached. It relies while the pole tube 28 am

Drive bearing plate 19 from the commutator and 70 on the pole tube 28th In the drive direction, a sun gear 80 connects to the armature 37, which is part of a planetary gear, in particular 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 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. Towards the output side, the planet wheels 86 are adjoined by a planet carrier 98, in which the axle journals 92 are received. 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 pot-shaped, that in this both the planet carrier 98 and the

Planet wheels 86 are included. 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. The intermediate bearing 101 is supported with its outer circumference on the inside of the pole tube 28. The armature 37 points to that of the commutator 52nd

distal end of the drive shaft 13, a further shaft journal 1 10, which is also included in a sliding bearing 1 13. The slide bearing 1 13 in turn is received in a central bore of the planet carrier 98. The planet carrier 98 is integrally connected to the output shaft 1 16. The output shaft 116 is supported with its end facing away from the intermediate bearing 101 1 19 in a further bearing 122 which is fixed in the drive bearing plate 19.

The output shaft 116 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 (external toothing), which is part of a shaft-hub connection 128. The shaft-hub connection 128 in this case allows the axially straight sliding of a driver 131. The driver 131 is a sleeve-like extension. The starter pinion 22 may alternatively be designed as a straight toothed pinion. Instead of electromagnetically excited pole pieces 31 with excitation windings 34, permanently magnetically excited poles could also be used. The electric Vorspuraktuator 16 and the linearly movable armature 168 also have the task of moving with a tension member 187 and a drive bearing plate 19 rotatably mounted lever. The lever 190, which is 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 pinched between these driver ring 197 and the

Andrehritzel 22 seen in the direction of engagement, einzuspuren in the outer teeth of the ring gear 25 of the internal combustion engine. Subsequently, the Einspurmechanismus will be discussed. The electric Vorspuraktuator 16 has a bolt 150 which is an electrical contact and in the case of Einbauseinsein in the vehicle at 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 provides a connection for the electrical

Starter motor 13, which is powered by the power supply 61 (thick wire). The lid 153 includes a housing 156 made of steel, which is fastened by means of a plurality of fastening elements 159, such as screws on the drive end plate 19. In the electric Vorspuraktuator 16, a pusher 160 for exerting a tensile force on the fork lever 190 and a switching device 161 is arranged. The thrust device 160 comprises a winding 162 and the switching device 161 a further winding 165. The winding 162 of the thruster 160 and the Wcklung 165 of the switching device 161 effect each in the on state - an electromagnetic field which flows through various components. The shaft-hub connection 128 may be equipped with a helical toothing instead of a spur 125. There are the combinations possible, after which a) the starter pinion 22 is helically toothed and the shaft-hub connection 128 a

Straight teeth 125 has, b) the starter pinion 22 is helically toothed and the shaft-hub connection 128 a

Having coarse thread toothing or c) the starter pinion 22 straight teeth, the shaft-hub connection 128 a

Has steep thread toothing.

Reference numeral 171 designates the armature return of the toe-in actuator 16, which is opposite to an end face of the linearly movable armature 168. Reference numeral 174 denotes a push rod, reference numeral 177 a shift pin. At a

Contact bridge 184, the contacts 180 and 181 are added.

FIG. 2 shows a toggle actuator 16, which is arranged in a housing 156 and has a tension element 187 which can move in the axial direction. The tension member 187 includes an opening in which a first spring leg 216 of a, in particular as Double leg spring trained bias spring element 212, engages. The bias spring element 212 partially shown in Figure 2 is in, in particular as

Plastic component manufactured lever 190, integrated. The lever 190 includes a first lever portion, see position 202 and a extending in the direction of the starter pinion 22 second lever portion 204th

At the lower end of the second lever portion 204 are locking pins 238 which engage in a circumferential groove 236 at a rear end face of the Andrehritzels 22. The starter pinion 22 in turn is axially displaceable on the output shaft 1 16 and includes a helical toothing 143, in the illustration according to Figure 2 in particular designed as external helical teeth.

As the illustration according to Figure 2 can be further removed, both the pole tube 28, which encloses a starter motor 13, not shown, as well as the Vorspuraktuator 16 mounted on a common drive bearing plate 19. The lever 190, which is designed in particular as a plastic injection-molded part with integrated biasing spring element 212, is mounted on a bearing block 206. On the outside of the lever 190 are integrally formed on the lever 190 pins, which are inserted as a rotation axis 224 serving in a recess 208 on the lever 190 facing end face of a bearing block 206.

FIG. 3 shows a section through the representation according to FIG. 2.

From the illustration according to FIG. 3, it can be seen that the particular as

Double leg spring trained bias spring element 212, the first spring leg

216 which is received in the traction element 187 moved by the recess 214 in the toggle actuator 16.

FIG. 3 furthermore shows that the spring element 212 has at least one first

Winding section 220 whose inner diameter is free. The first

Winding portion 220 is held in a spring receiving space, which is bounded by the semicircular recess 208 on the end face of the bearing block 206 on the one hand and on the other hand by a free space in the lever 190. The illustration according to FIG. 3 shows in particular that, starting from the first spring limb 216, the inner diameter of the first wall section 220 is free of internals, in particular is free of a mandrel or an axis. This ensures that at one

Compression of the spring a self-adjusting reduction of the diameter interior to a clamping of the winding portion 220 on just this non-existent mandrel or on just this non-existent axis to a blockage of

Biasing spring element 212 leads.

From the perspective sectional view of Figure 3 shows that the at least one Wndungsabschnitt 220, formed in particular of the double leg spring biasing spring element 212, in the recess 208 of the bearing block 206 and a spring receiving space 244 opposite this in preferably as

Injection molded component manufactured lever 190 is arranged. Below the bearing block 206 is the pole tube 28, which in turn surrounds the starter motor 13 of the starting device 10. It can be seen in FIG. 2 in conjunction with FIG. 3 that the ring gear 95 projects somewhat into the spring receiving space 244 with a body corner 96 of itself. This leads advantageously to the fact that the starting device 10 can be made somewhat more compact. In Figure 14, this relationship is also shown. FIG. 4 shows a perspective view of the components bearing block,

Biasing spring element and lever.

From FIG. 4 it can be seen that the lever 190 above the rotation axis 224, formed by the spigots molded onto the outside of the lever 190, the first lever section 202 and below the rotation axis 224 are the second lever sections 204 designed as a fork 210 and extending substantially next to one another , having. At the lower end of the two juxtaposed second lever portions 204 are locking pins 238, which in the circulation groove 236 shown in Figure 2 at the rear

Engage the front side of the Andrehritzels 22. Within the first lever section 202, a guide, which is shown in greater detail, preferably extends, which extends the first

Spring leg 216, which engages in the tension element 187, cf. illustration according to FIG. 3.

Figure 5 shows a section through the perspective view of the lever shown in Figure 4 with integrated biasing spring element. Figure 5 shows that between the recess 208 of the bearing block 206 and a

Cavity, in particular made of plastic as an injection molded lever 190, a spring receiving space is formed, in which both a first winding portion 220 and a second winding portion 222 of the biasing spring member 212 extend. Through the first lever portion 202, the first spring leg 216 extends, while at least one further, second leg 218 rests against the inside of the profiled lever 190. The mounting of the lever 190, designed in particular as a fork lever 210, takes place within a spring receiving space by positioning the bearing block 206 against the lever 190.

Figure 6 shows a perspective view of the lever with integrated

Biasing spring element, in particular designed as a double leg spring. As can be seen from the perspective view according to FIG. 6, this is as

Double leg spring trained biasing spring element 212 mounted on the inner sides in the region of the axis of rotation 224 of the fork lever 190. In particular, that is

preferably designed as a double leg spring biasing spring element 212 is mounted such that this storage takes place laterally and an unobstructed

Inner diameter reduction is ensured upon compression of the spring element 212. FIG. 6 shows that the first spring limb 216 extends substantially in the vertical direction upward, while the two wall sections 220 and 222 are located next to one another in the plane of the rotation axis 224. The at least one second

Spring leg 218 extends downwardly with respect to the turn portions 220, 222 in the vertical direction. The fork 210, formed by the second lever portions 204, has on the inside the already mentioned locking pin 238, which engage in the circumferential groove 236 shown in Figure 2 at the rear end face of the Andrehritzels 22.

Figure 7 shows the lever with integrated biasing spring element in a rest position.

The rest position of the lever 190, which is designed in particular as a fork lever, shown in FIG. 7 shows that the starting pinion 22 with its external toothing 143 assumes its rest position on the output shaft 16. Which is on the inside at the bottom of the second

Lever portion 204 located locking pin 238 engage in the circumferential groove 236, so that the starter pinion 22 upon actuation of Vorspuraktuators 16, see housing 156th according to Figure 7, in the axial direction along the output shaft 116 is movable. From Figure 7 shows that both the Vorspuraktuator 16 and the output shaft 1 16 are mounted in the common drive bearing plate 19. FIG. 7 further shows that in the rest position 226 and the lever 190 shown there, the first spring leg 216 is located within the opening 214 of the tension element 187 which can be moved in the axial direction. The lever 190 enclosing the biasing spring element 212 is mounted on the bearing block 206. Below the bearing block 206 is the pole tube 28, which receives the starter motor 13 not shown in Figure 7 in detail. In the rest position 226 of the lever 190 shown in the illustration according to FIG. 7, the latter exerts a first spring force 228, seen in the direction of engagement of the starting pinion 22, on it.

Figure 8 shows a Vorspurlage the Andrehritzels 22 after actuation of the Vorspuraktuators. After actuation of the Vorspuraktuators 16 this pulls the tension element 187 so that the first spring leg 216 extends through the recess 214 in the tension element 187, as a result, the lever 190 is pivoted about the axis of rotation 224 and the second lever portion 204, the starter pinion 22 in the axial direction along the output shaft 1 16 shifts. Ideally, the outer toothing 143 of the Andrehritzels 22 in the outer toothing of the ring gear 25 shown in Figure 1 is the

Internal combustion engine meshed. In this case, the biasing spring element 212 integrated in the lever 190 likewise exerts the first spring force 228-directed in the direction of engagement of the starting pinion 22-onto the latter. The Vorspurlage the Andrehritzels 22 of Figure 8 is indicated by reference numeral 230 and differs from the rest position, which is shown in the illustration of Figure 7, compare position 226, a greater deflection of the first lever portion 202 and the second

Lever portion 204 having lever 190 with respect to its axis of rotation 224 identified. 9 shows a "tooth-on-tooth" lever layer 232. The illustration according to FIG. 9 shows that if the external toothing 143 does not meet any tooth gap of the toothed rim 25, the end faces of the starting pinion 22 and the toothed teeth 22 Because of the "tooth-on-tooth" position 232, the starting pinion 22 with its external toothing 143 does not just spill into the external toothing of the toothed rim 25 of the internal combustion engine to be turned on. In this case results 9, a second spring force 234, which is exerted on the second lever portion 204 and the circumferential groove 236 on the starter pinion 22 in the direction of engagement due to the non-possible deflection of the second lever portion 204 about the rotation axis 224 upon actuation of the Vorspuraktuators 16 , In this case, remains until the meshing of Andrehritzels 22 and to the meshing of the outer teeth 143 in the outer teeth of the ring gear 25 of the internal combustion engine

Andrehritzel 22 applied to the first spring force 228 exceeding second spring force 234. Figure 10 shows the lever, in particular designed as a fork lever with integrated

Biasing spring element.

As can be seen from FIG. 10, the prestressing spring element 212, which is designed in particular as a double leg spring, has its first turn section 220 and its second wall section 22 substantially in the area of the axis of rotation of the lever 190 given by the pins 224. This lever, in particular as a plastic injection molded part, comprises the first lever portion 202 with a guide 240 and formed as a fork 210 second lever portion 204. At the two, in the

Substantially parallel to each other forked extending second lever portions 204, located on the inside of the already mentioned several times locking pin 238, in the

Umlaufnut 236 engage the rear end face of the Andrehritzels 22.

The illustration according to Figure 1 1, the lever, in particular the fork lever according to Figure 10 without biasing spring element can be seen.

FIG. 11 shows that, in the region of the spring receiving space, compare position 244 in FIG. 12 on the inner sides of the side surfaces of the lever 190, away from the pins forming the rotation axis 224, there are locking lugs 242 which comprise the first winding section 220 and the second winding section, respectively 22 of the

Pretension spring element 202 only fix laterally. As a result, the inner diameter of the two turn portions 220 and 222 remains free of internals, so that upon actuation of the first spring leg 216 about the rotation axis 224, a reduction of the inner diameter of the Wndungsabschnitte 220 and 222 do not lead to a jamming, ie a blockage of the biasing spring element 212. Furthermore, it remains between the first two windings, which are formed after the spring leg 216, and thus after assembly This space 245 is a part of the spring receiving space 244 and allows mounting of the biasing spring element 212 in the spring receiving space 244. Without this intermediate space 245 to be provided the turns of the biasing spring member 212 could not be inserted into the spring receiving space 244, since the opposing locking lugs 242 unhindered

Do not allow insertion of the bias spring element 212 in the spring receiving space 244. At least the respective first turn after the spring leg 216 is free in its interior (free space 250), so that a rotational blockade of each first turns can not be done.

For mounting the biasing spring element 212 in the spring receiving space 244 two possibilities are given: In a first possibility, which are between the two halves of the spring leg 216 and the two legs 218 respectively located turns ("Wndungspakete") moved toward each other, so that these simultaneously between the locking lugs Afterwards, the walls ("winding packages") of the two halves of the pretensioning spring element 212 are pushed onto the locking projections 242 by relaxing the pretensioning spring element 212. This works when the Wndungen ("Windungspakete") in total less wide than the distance between the two locking lugs 242 to each other.

In a second possibility, which will be between the two halves of the

Spring leg 216 and the two legs 218 respectively located Wndungen

("Windungspakete") successively on and thus moved past between the locking lugs 242 and each pushed over after passing the locking lugs 242 on the respectively associated locking lug 242. This is necessary if the Wndungen ("Wndungspakete") total wider than the distance between the two Latches 242 to each other.

FIG. 12 shows a sectional view of the lever support 200.

From the illustration according to FIG. 12 it can be seen that the wall sections 220 and 222 of the prestressing spring element 212, which is designed in particular as a double leg spring, are arranged in a spring receiving space 244, since they are laterally separated from those shown in FIG shown latching lugs 242 for lateral fixation of the biasing spring element 212 is limited and on the other hand from an end face of the bearing block 206, in which in particular the already mentioned recess 208 for receiving the pivot axis 224 forming cams on the outside of the lever 190 are located.

As can be seen from FIG. 12, the pins forming the axis of rotation 224 of the lever 190 are received in particular in the drive end shield 19. The rotation axis 224 forming pins are urged by a recess 208 which is formed in the bearing block 206 against the bearing plate 19 so that the axis of rotation 224 occupies a well-defined position in the bearing plate 19.

FIG. 13 shows a first embodiment variant of the lever support. As FIG. 13 shows, the pins forming the axis of rotation 224 are accommodated on the lever 190, which is designed in particular as a fork lever, on one bearing point 252, the drive end shield 19; on the other hand, the recess 208 in the bearing block 206 also acts on the pin forming the axis of rotation 224 of the lever 190, not shown in Figure 13 a. The storage location 252 as shown in Figure 13 may be configured, for example, as a U-shaped profiled sheet, which may be injected into the bearing block 206, for example, or clipped to this or otherwise secured.

The illustration according to FIG. 14 shows a further possible embodiment of the lever support.

The bearing block 106 also includes the recess 228, but on which not the pivot axis forming the pin 224 but the contour of the lever 190 itself is applied. In contrast to the first embodiment variant of the lever mounting illustrated in FIG. 13, the bearing block 206 comprises a bearing bracket 224 which delimits a recess 256. In this recess 256 rests the axis of rotation formed by bearing pin 224 of the lever 190. Starting from the lever bearing 200 of the lever 190 formed in particular as a fork lever comprises the first lever portion 202 of the starting from the

Rotary axis 224 extends in a vertical upward direction, while the second lever portion formed in particular as a fork lever 204 extends downwardly from the lever support 200. Reference numeral 95 in the illustration according to Figure 14, the outer contour of the ring gear 95, which is part of the epicyclic gear 83 shown in Figure 1, designated. The respective free space 250 in the spring winding sections 220, 222 is surrounded here by more than just one spring turn.

Claims

claims

1. Starting device (10) for an internal combustion engine with a Vorspuraktuator (16) which actuates a lever (190), with a Andrehritzel (22) in a sprocket (25) of the internal combustion engine is switched on or disengaged, characterized

characterized in that on the lever (190, 202, 204) a biasing spring element (212) is actuated, which is actuated by the Vorspuraktuator (16) and the

Andrehritzel (22) via a lever portion (202, 204) imposing a force acting in the direction of spring force (228, 234).

2. Starting device (10) according to claim 1, characterized in that the

Preload element (212) has at least one spring winding portion (220, 222) located on opposite latching lugs (242) laterally in a

Spring receiving space (244) of the lever (190) is supported.

3. Starting device (10) according to claim 1 or 2, characterized in that the at least one spring winding portion (220, 222) encloses a free space (250).

4. Starting device (10) according to one of the preceding claims, characterized

characterized in that the biasing member (212) comprises two spring winding portions (220, 222) between which there is a gap (245).

5. Starting device (10) according to one of the preceding claims, characterized

characterized in that the ring gear (95) projects with a body corner (96) of itself into the spring receiving space (244).

6. starting device (10) according to one of the preceding claims, characterized

characterized in that the lever (190) is made of plastic and has a first lever portion (202) and at least one second lever portion (204).

7. starting device (10) according to one of the preceding claims, characterized

characterized in that the lever (190) in the first lever portion (202) comprises a guide (240) for the biasing member (212), the second lever portion (204) as Fork (210) is executed, on which locking pins (238) are arranged, which engage in a Umlaufnut (236) for toeing the Andrehritzels (22).

8. starting device (10) according to one of the preceding claims, characterized

characterized in that the biasing member (212) is formed as a double leg spring having a first and a second spring leg (216, 218).

9. Starting device (10) according to one of the preceding claims, characterized

in that at least one respective first turn after the spring leg (216) is free in its interior (clearance 250), so that a rotational blockade of the respective first turns can not take place.

10. Starting device (10) according to one of the preceding claims, characterized

characterized in that the spring receiving space (244) at least on the one hand by a bearing block (206) and its recess (208) and on the other hand by the guide

(240) and the optionally existing latching noses (242) of the lever (190) is limited.

1 1. Starting device (10) according to one of the preceding claims, characterized

characterized in that in a rest position (226) of the lever (190) and in a

Vorspurlage (230) of the Andrehritzels (22) of this with a first spring force (228) is acted upon.

12. Starting device (10) according to one of the preceding claims, characterized

characterized in that in a "tooth-on-tooth" lever layer (232) of the lever (190) the

Andrehritzel (22) is acted upon by a second spring force (234) in the direction of engagement.

13. Starting device (10) according to one of the preceding claims, characterized

in that the lever (190) is pivotable about an axis of rotation (224) defined by pins, wherein the pins are mounted in a recess (208) of the bearing block (206).