DE102011081181A1 - Cranking device, particularly starter for starting internal combustion engine of a vehicle, has floating armature shaft that is axially secured by axial securing device in elastically engaging manner - Google Patents

Abstract

The cranking device has a floating armature shaft (17) that is axially secured by axial securing device (100) in an elastically engaging manner, where the axial securing device partially encases the armature shaft. The axial securing device is formed with an integrated elastic part (102) and a fastening part (101). The fastening part is formed as an annular or sleeve-shaped part for attaching the axial assurance device to the cranking device. The elastic part has a formation projecting from the fastening part. An independent claim is included for a method for axial securing of an armature shaft of a cranking device.

Description

The invention relates to a starting device, in particular a starter, for starting an internal combustion engine, according to the preamble of claim 1.

Furthermore, the invention relates to a method for the axial securing of an armature shaft of a starter device, according to the preamble of claim 10.

State of the art

The invention relates to a system with a starter or starter motor and a starter with internal reduction gear and a transmission for reducing the speed while increasing the torque according to the type of independent claims.

The present invention starters and starters for vehicles with internal combustion engines, in which an armature shaft is floatingly mounted.

From the prior art, starters with a starter relay for vehicles with internal combustion engines are known, which generally comprise a DC electric motor for driving the internal combustion engine. Such DC electric motors have a starter rotor which acts on an output shaft. The starter rotor is provided with a commutator to whose segments a rotor winding is connected. The commutator interacts with a carbon brush assembly. Furthermore, a pole tube with permanent magnets or a stator with stator winding is provided. The starter rotor has an armature shaft. The armature shaft is usually floating. In this case, due to manufacturing tolerances, a very large armature longitudinal play can occur, which can be up to 2 mm. Due to the armature shaft clearance, increased wear on the carbon brushes occurs. Accordingly, an anchor wavelength play is to be reduced.

From the DE 198 04 328 A1 is an axial fixation of an armature shaft rolling bearing known. The axial fixation of the bearing receiving the shaft preferably for electrical machines is designed such that, for example, an inner ring thereof is pressed by abutting the outer ring, resilient rings against a shaft shoulder. The axial fixation of the spring rings and the bearing is accomplished by a special spring washer, which is provided with external claws, which press into the bore wall of the bearing. In this way one achieves a simple and inexpensive axial fixation of the rolling bearing and the shaft.

In the known solution, the rolling bearing is held on the Krallscheibe. Between Krallscheibe and bearing at least one elastic element is arranged. Here, the hiring or adjusting the Axiallängsspiels on the bias of the elastic element and the positioning of the Krallscheibe done. In addition, the fixation on the claw disk by a claw on the rolling bearing. This type of adjustment or reduction of a Axiallängsspiels is relatively expensive.

Disclosure of the invention

The starting device according to the invention and the inventive method with the features of the corresponding main claim or independent claim have the advantage over the prior art that in a starter, especially in a starter, for cranking an internal combustion engine, which includes a floating armature shaft, which via a the armature shaft at least partially surrounding axial securing means is elastically secured axially secured, wherein the axial securing means with at least one integrated elastic part and at least one fastening part, in particular in one piece, is formed, the setting is made via a single part. When mounting only the axial securing device is to be arranged accordingly. A complex hiring or setting is not required. Zusärtliche elastic elements are not provided. Preferably, the axial securing device is designed as a claw bush or claw ring or scribing. Thus, the axial securing device surrounds the armature shaft in the circumferential direction completely. In another embodiment, a radial gap or slot is provided, so that the axial securing device surrounds the armature shaft only partially. The claws of the claw disc are preferably arranged on the inside, so that the claw ring or the claw disc clings to the shaft and not to the bearing. Thus, the shaft is groove-free design in one embodiment, since no additional securing takes place on the shaft by the clawing. Also can thus be further axial securing such as retaining rings or the like save. Alternatively or additionally, a claw disk with external claws is provided. The claw disk rests directly against a bearing point, that is, the claw disk directly contacts a commutator bearing or a bearing bush. The axial securing device is formed with an integrated elastic part and fastening part. In one embodiment, the axial securing device is integrally formed. That is, there are no other elements such as elastic members and the like provided. For example, however, two claw disks, which are fixedly and / or non-detachably connected to each other, are provided. In another embodiment, the axial securing device is multi-part, in particular formed in two parts. Here, for example, several Krallscheiben are provided which rest against each other loosely.

The measures listed in the dependent claims advantageous refinements and improvements of the independent and independent claims predetermined devices are possible.

An advantageous embodiment provides that the fastening part is designed as an annular and / or bush-shaped part, with which the axial securing device is fixed to the starter. About the attachment part, the axial securing device is easy to install, for example in a molding on a surrounding the shaft component such as a commutator. The fastening part is preferably arranged radially away from the armature shaft to be secured. More preferably, the fixing member is formed as a ring, which is formed, for example, thicker than the elastic member connected thereto. In embodiments, the ring may have projections or thickenings in order to hold the axial securing device in corresponding receptacles. Specified within the meaning of the invention means that the fastening part is fixed in at least one degree of freedom.

In an advantageous embodiment, it is provided that the elastic part comprises at least one protruding from the fastening part Anformung, preferably a plurality of spaced-apart projections, which are formed resiliently deformable to the fastening part. The projections are preferably arranged radially adjacent viewed from the armature shaft to be secured. That is, the Anformung protrudes from the fastening part radially to the armature shaft. In another embodiment, the projections are arranged radially away. The Anformung is arbitrarily shaped executable. In a simple embodiment, the molding is formed like a flap, for example, with a polygonal, in particular rectangular, square or triangular cross-section. In a fixing portion in which the elastic member is connected to the fixing member, the fixing portion is made thick accordingly, so that the elastic member does not break off from the fixing member under a load. For this purpose, the attachment region can be formed, for example, in the manner of a film hinge. In this case, the fastening region allows a deformation of the elastic part, which corresponds to a bending or buckling of approximately up to 90 °, so that the originally radially to the armature shaft facing elastic part is then aligned substantially almost parallel to the armature shaft. The elastic part is more complex in other embodiments. The protruding elastic part has, for example, slots or the like in order to form elastic partial sections on the elastic part. The formed as Anformung elastic part then has itself further elastic sections, for example in the form of projections. The individual sections are Favor in different planes or bent or curved to each other. Next can be formed by different imprints elastic partial areas.

Furthermore, an embodiment provides that the armature shaft is formed groove-free in the region of the axial securing device. The axial securing of the axial securing device to the armature shaft is effected by the elastic part, which is in clamping action with the armature shaft. Due to this frictional connection, the clamping is effected. Accordingly, it is advantageous if a plurality of elastic parts, that is, a plurality of elastic, deformable projections are provided. The projections are arranged in an embodiment equidistant from each other. In other embodiments, different distances are provided. The shape of the projections is preferably chosen equal to realize a simple production. In other embodiments, at least two projections are formed with different shapes. The shape is always chosen so that no groove is provided on the armature shaft. Possibly. For example, in the area of interaction between the molding and the shaft, a coating can be provided which improves a frictional interaction. Also, roughening is provided for the area in one embodiment. In addition, an advantageous for a clamping effect material pairing of armature shaft and elastic member is provided.

In an advantageous embodiment, it is provided that a commutator bearing is provided in the region of the axial securing device, in which a recess for receiving the axial securing device is provided, in which the axial securing device is received at least with the fastening part, so that the elastic part projects at least partially beyond the molding. The molding is formed, for example, as a groove, which in each case has a wall in an axial direction, that is to say in an extension direction of the armature shaft. In this way, the fastening part is secured in the axial direction on both sides by the commutator. In other embodiments, a recess and / or a shoulder is provided in the commutator, so that the fastening part is secured in the axial direction on one side by the Kommutatorlager. On the other hand, the axial securing device is secured by an adjacent component, such as a socket.

In a further preferred embodiment it is therefore provided that adjacent to the armature shaft and / or the commutator is provided a socket and the attachment part of the axial securing means between Kommutatorlager and socket is arranged. In this way, the production of a corresponding receptacle for the attachment part to the commutator is simplified.

In another advantageous embodiment, it is provided that the fastening part of the axial securing device has a guide part with which the axial securing device is guided on the armature shaft. The guide member is fixed and formed substantially non-deformable. With this guide part of the fastening part is applied to the armature shaft. In one embodiment, the guide part is designed as an area thickened relative to the annular fastening part. Preferably, the guide part is designed as a guide bush. In this case, the guide bush is dimensioned such that there is a clearance fit with respect to the armature shaft.

In yet another embodiment, it is provided that a passage of the axial securing device, in particular a limited by the fastening part and / or the protruding elastic part or the elastic parts projecting therefrom, through which the armature shaft extends, a smaller inner dimension, than that Outside dimension of the armature shaft has, so that when plugged anchor shaft of the fastening part leading and / or the elastic part resiliently applied to the armature shaft. Preferably, the passage without the elastic part substantially corresponds to the outer dimension of the armature shaft, preferably taking into account a deformation measure which is required for a deformation of the elastic part, so that it can bend up to a parallel alignment with the armature shaft. Preferably, the dimension of the passage is dimensioned so that the projections at an angle in the range of about 10 ° to about 80 °, preferably from about 20 ° to about 70 ° to the armature shaft abut against this. Other angles are also possible, for example, 10, 20, 30, 40, 50, 60, 70, 80, 90 degrees and also angles therebetween in the range of +/- 5 degrees.

It is preferably provided that the axial securing device is designed as a claw bush or as a claw disk or claw ring. The fastening part is designed as a ring or socket. The elastic, deformable part forms the claws. The attachment area is the area where the claws are attached to the attachment part. The claws can be arranged inside or outside. In one embodiment, the axial securing device is formed with a plurality of claw disks and / or claw bushings. In particular, an embodiment provides that two claw disks are provided. The claw disks are formed differently in one embodiment. For example, one claw disc has internal claws and the other claw disc has external claws. The claw disks are preferably adjacent to each other. More preferably, the claw disks are connected to each other, in particular inseparably connected to each other, for example, materially by welding, gluing or the like.

The inventive method for axial securing an armature shaft of a starter, wherein an axial securing device according to the invention with the fastening part on or in a commutator and / or adjacent to a socket is arranged and the armature shaft is pushed through a passage of the axial securing means, so that the elastic member contacts the armature shaft and when inserting the armature shaft is resiliently deformed, without lifting the contact, has the advantage over the prior art that an additional adjustment of the elastic element is eliminated, since by bending or deformation of the elastic member, the setting during mounting takes place simultaneously with the mounting , Elaborate Nacheinstellungen omitted. Also eliminates additional security measures such as the provision of shaft grooves and insertion of retaining rings. In addition, no other components between the axial securing device and a socket or a commutator be provided.

Brief description of the drawings

Embodiments of the invention are illustrated in the drawings and explained in more detail in the following description. Show it:

1 a longitudinal section through a starting device,

2 3 shows a section of a section of a first embodiment of a starter device with an axial securing device in an assembled state,

3 in a cross-sectional view of a section of the first embodiment of a starter with an axial securing device after 1 before inserting the armature shaft,

4 in a cross-sectional view of a detail of another embodiment of a starter with an axial securing device in an assembled state,

5 in a partially sectioned perspective view a section of the as Claw bush running axial securing device according to 4 .

6 in a cross-sectional view of a detail of another embodiment of a starter with an axial securing device in an assembled state and

7 in a cross-sectional view of a section of another embodiment of a starter with an axial securing device in an assembled state.

Description of the embodiment

1 shows a longitudinal section through a starter or a starter 1 , This has a housing 2 in which a DC motor 3 and an engagement relay 4 are housed. The DC motor 3 has a starter rotor 5 on, on an output shaft 6 works, at the end 7 a pinion 8th is arranged rotationally fixed. For the starting operation of an internal combustion engine, not shown, the pinion moves 8th in the in the 1 dashed line position 9 in front and spurt into a sprocket 10 the internal combustion engine. The axial displacement of the pinion 8th in the position 9 is through the engagement relay 4 causes. The starter rotor 5 is with a commutator 11 provided on whose segments 12 a rotor winding 13 connected. The commutator 11 acts with a carbon brush assembly 14 together. Further, a stator 15 with stator winding 16 provided, the starter rotor 5 opposite with a small air gap. The starter rotor 5 has a rotor shaft or armature shaft 17 on, at one end 18 from a housing cap 20 is overflowed. The other end of the armature shaft 17 has one from its front 21 outgoing, central receiving bore 22 on, in that one end 23 the output shaft 6 intervenes. The other end of the armature shaft 17 is via a needle bearing 31 that in the receiving hole 22 is arranged on the end 23 the output shaft 6 stored.

The lateral surface 24 of with receiving bore 22 provided end 25 the armature shaft 17 is as a sun wheel 26 trained, with planet wheels 27 combs that on a planet carrier 28 are arranged (in the 1 is just a planetary gear 27 shown). The planet wheels 27 are with the interposition of a needle bearing on bearing pins 29 arranged. Furthermore, the planet gears mesh 27 with an internally toothed ring gear 30 that is stationary in the housing 2 is arranged. The end 23 the output shaft 6 is via a needle bearing 37 in the receiving bore of the axial web 39 stored. The freewheel outer ring 35 is through a deep groove ball bearing 38 on the axial bridge 39 is arranged and on the other hand in the housing 2 supports, holds (fixed bearing). In the opposite end area 32 the output shaft 6 is - from the case 2 held - a cylindrical roller bearing 33 provided, the - outward - a Simmerring 34 upstream. The cylindrical roller bearing 33 leads the output shaft 6 both in the axial and in the radial direction. The planet carrier 28 is axial with the freewheel outer ring 35 about screws 36 connected. The freewheel outer ring 35 belongs to a freewheel device 40 on, which is designed as a roller freewheel. It has spring-loaded rollers 41 on that with an inner ring 42 the freewheel device 40 interact. The inner ring 42 stands over a steep thread 43 with the output shaft 6 in connection. Furthermore, the output shaft 6 a groove 44 on, in which a snap ring 45 is arranged. The snap ring 45 forms a stop, which - in an even closer to be described - axial displacement of the output shaft 6 with a step 46 of the inner ring 42 interacts. On the output shaft 6 is a retaining ring 47 attached, which has a radial collar 48 having. It also lies in a groove 49 of the retaining ring 47 a snap ring 50 one who has a slice 51 supported. Between disc 51 and radial collar 48 thus becomes an annular channel 52 educated. At the end 7 the output shaft 6 is the pinion 8th rotatably mounted, but axially displaceable. It is powered by a helical compression spring 54 applied. This is preloaded when the meshing of the pinion 8th in the sprocket 10 a tooth-on-tooth position results. The engagement relay 4 has a fixed relay winding 61 on that with an anchor 62 interacts. The anchor 62 is mounted axially displaceable and is formed by a trained as a helical compression spring return spring in the non-energized state of the contactor 4 in the in the 1 pushed position shown. The axis 63 points at its one end 65 a contact element 66 on, that with electrical connections 67 can interact. The anchor 62 is with a pestle 68 connected in a housing room 69 of the housing 2 protrudes. The pestle 68 acts with a trained as double lever engagement lever 70 together, about in its middle area by means of a transverse bolt 71 is mounted pivotably. The cross bolt 71 is on a housing side boom 72 held. The lower end 73 of the lever 70 is with a lead 74 provided in the annular channel 52 intervenes. On the other end 75 of the lever 70 is designed a driving head. By shifting the plunger 68 becomes the engagement lever 70 taken, whereby an axial displacement of the output shaft 6 he follows. In the non-energized state of the engagement relay 4 is to take care that the pinion 8th the in the 1 does not leave the position shown by solid lines. A locking device 77 prevents the pinion 8th unintentionally in the direction of the sprocket 10 the internal combustion engine moves, as this could lead to damage of the parts. This unintentional axial movement can occur because braking moments, the z. B. by the camp and shaft seals occur, the output shaft 6 move in Einspurposition, that is, the restoring spring forces are smaller than the axial force components occurring on the coarse thread.

The 2 to 7 show two different embodiments of the starter device according to the invention 1 , 2 and 3 show a first embodiment of the starter device according to the invention 1 with a as Krallscheibe 100a trained axial securing device 100 in a condition after and before assembly. 4 shows the second embodiment of the starter 1 with a as Krallbuchse 100b executed axial securing device 100 , 5 shows the Krallbuchse 100b to 4 enlarged in isolation. 6 shows a further embodiment of the inventive starting device 1 with an axial securing device 100 and 7 shows in a further embodiment of the inventive starting device 1 an axial securing device 100 with two Krall writing 100a ,

2 shows a section of a first embodiment of a starter device in a cross-sectional view 1 with an axial securing device 100 in a mounted state. In the clipping is the end 18 the floating armature shaft 17 shown. The armature shaft 17 has a shaft shoulder 17a on to which a socket 113 is applied. The socket 113 again lies on a commutator bearing 114 at. The commutator bearing 114 is as part of a lid 2a of the housing 2 educated. Next points the commutator 114 a paragraph 115 on. Axial between the radial between the commutator bearing 114 and the armature shaft 17 arranged socket 113 and the commutator camp 114 is in the axial direction A, the axial securing device 100 arranged. This is between an axial end of the bushing 113 and the paragraph 115 trapped. Trapped in the sense of the invention is to be understood that the axial securing device 100 rotate with minimal play, especially with the armature shaft 17 can turn, can. The axial securing device 100 has a fastening part 101 on. On the fastening part 101 is radially inward towards the armature shaft 17 showing an elastic, deformable part 102 educated. The axial securing device 100 has a radially inward passage 103 on (see 3 ), through which the armature shaft 17 in the assembled state is pushed through. An inside dimension of the passage 103 is smaller than an external dimension 17b (please refer 3 ) of the armature shaft 17 , as in 3 clearly visible. When inserting the armature shaft 17 through the passage 103 thus contacts the armature shaft 17 the elastic part 102 , This is at corresponding force when inserting the armature shaft 17 deformed in the axial direction A, without losing its resilient property. For a corresponding deformation is a corresponding mounting area 104 formed, which a deformation of the elastic member 102 opposite the fastening part 101 allows, however, prevents a cancel. The fastening part 101 over which the axial securing device 100 between the socket 113 and the paragraph 115 is stored, remains undeformed. In the embodiment according to 1 and 2 is the attachment part 101 ring-shaped. The elastic part 102 has several flap-shaped projections 105 , For example, thin-walled sheet metal parts, on. Thus, the axial securing device 100 as a claw disc 100a formed with radially inwardly directed claws.

3 shows in a cross-sectional view a section of the first embodiment of the starter 1 with the axial securing device 100 to 2 before inserting the armature shaft 17 , For identical or similar components, the same reference numerals are used. A renewed, detailed description of the components is not carried out. It is clear in 3 the passage 103 to recognize. The ratio of passage 103 and external dimensions 17b the armature shaft 17 determines the degree of deformation of the elastic member 102 , The smaller the passage 103 and the bigger the outside dimension 17b the greater the deformation and consequently the greater the clamping, with a certain ratio not to be exceeded. Due to the deformation of the elastic part 102 stands the elastic part 102 obliquely to the armature shaft 17 , The case between armature shaft 17 and elastic part 102 resulting angle is in the range of 0 ° to 90 °, with angles between 10 ° and 80 °, more preferably between 20 ° and 70 ° have been found to be particularly advantageous.

4 shows a section of a further embodiment of the starter device in a cross-sectional view 1 with the axial securing device 100 in a mounted state. In contrast to the embodiment according to 2 and 3 is the axial securing device 100 not here as a claw disc 100a but as a Krallbuchse 100b executed. The Krallbuchse 100b points in contrast to the claw disk 100a in the attachment part 101 a guide part 106 on, like in 5 clearly shown. Corresponding is also the elastic part 102 slightly different to the embodiment according to 2 and 3 formed to a corresponding clamping effect with the armature shaft 17 to effect. The guide part 106 is from the mounting part 101 curved, curved or bent executed. About the leadership part 106 a corresponding guide along a surface of the armature shaft 17 , Thus, a bush-like guide part 106 designed according to the contour of the armature shaft 17 Voted is. Accordingly, the axial securing device 100 as a claw socket 100b educated. The elastic part 102 protrudes in extension to the leadership part 106 from. This is done with respect to the guide part 106 no or only a slight curvature. The clamping action of the elastic part 102 via spring arms 102 that have an in 5 clearly illustrated Knickarmausbildung realize a clamping action.

5 shows in a partially sectioned perspective view a section of the claw bushing 100b executed axial securing device 100 according to 4 , As in 5 The elastic part protrudes clearly 102 in extension to the management area 106 from. The elastic part 102 is as a spring arm 102 formed or has a plurality of spring arms 102 on. Approximately in the middle of each spring arm 102 a kink is provided. The passage is corresponding 103 initially larger in the region of the bend in the radial direction than in the region of the guide part 106 , That to the leadership part 106 removed end of the spring arm 102 then runs together again, that is towards the armature shaft 17 , so that a passage narrowing compared to the Durchlassweiterung takes place in the region of the Knicks. In this way, a claw is like a spring arm 102 realized which a clamping with the armature shaft 17 causes.

6 shows a section of a further embodiment of the starter device in a cross-sectional view 1 with an axial securing device 100 in a mounted state. In the clipping is how in 2 , the end 18 the floating armature shaft 17 shown. The armature shaft 17 points opposite the armature shaft 17 in 1 an additional shaft shoulder 17a on. At this additional paragraph 17a is the as Krallscheibe 100a trained axial securing device 100 at. For axial securing is still a retaining ring 100c provided, which on the armature shaft 17 sitting. The claw disk 100a is formed with external claws, which in the assembly according to deformation of the commutator 114 claws. The operation is analogous to that in 2 , where the claws of the claw disk 100a not like, as in 2 , to the armature shaft 17 claws, but to the commutator 114 ,

7 shows a section of a further embodiment of the starter device in a cross-sectional view 1 with the axial securing device 100 in a mounted state. The embodiment shown here substantially corresponds to the exemplary embodiment 6 , However, in the embodiment according to 7 the circlip 100c through a second claw disk 100a replaced. The axial securing device 100 Thus, in the exemplary embodiment shown here, it comprises two mutually adjacent claw writing 100a , The first claw disk 100a corresponds to the in 6 illustrated Krallscheibe 100a , Thus, has radially outer claws in contact with an inner surface of the commutator 114 stand. The second claw disk 100a lies on the first claw disk 100a and has radially inner claws, which are in contact with the armature shaft 17 stand. During assembly, therefore, the claws lying on the inside cling to the armature shaft 17 and the external claws on the commutator 114 , The two claw disks 100a are connected in the embodiment shown here to each other at a contact area. A loose arrangement is also feasible.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• DE 19804328 A1 [0006]

Claims (10)

Starting device ( 1 ), in particular a starter, for starting an internal combustion engine, comprising a floating armature shaft ( 17 ), which via an armature shaft ( 17 ) at least partially surrounding axial securing device ( 100 ) is elastically secured axially secured, characterized in that the axial securing device ( 100 ) with at least one integrated elastic part ( 102 ) and at least one fastening part ( 101 ) is trained. Starting device ( 1 ) according to claim 1, characterized in that the fastening part ( 101 ) is formed as an annular and / or bush-shaped part with which the axial securing device ( 100 ) on the starter ( 1 ). Starting device ( 1 ) according to claim 1 or 2, characterized in that the elastic part ( 102 ) at least one of the fastening part ( 101 ) projecting Anformung, preferably a plurality of spaced-apart projections comprises, which are resiliently deformable to the fastening part ( 101 ) are formed. Starting device ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the armature shaft ( 17 ) in the area of the axial securing device ( 100 ) is formed groove-free. Starting device ( 1 ) according to one of the preceding claims 1 to 4, characterized in that in the region of the axial securing device ( 100 ) a commutator bearing ( 114 ) is provided, in which a molding for receiving the axial securing device ( 100 ) is provided, in which the axial securing device ( 100 ) at least with the fastening part ( 101 ), so that the elastic part ( 102 ) projects at least partially beyond the molding. Starting device ( 1 ) according to one of the preceding claims 1 to 5, characterized in that adjacent to the armature shaft ( 17 ) and / or the commutator bearing ( 114 ) a socket ( 113 ) is provided and the fastening part ( 101 ) of the axial securing device ( 100 ) between commutator bearings ( 114 ) and socket ( 113 ) is arranged. Starting device ( 1 ) according to one of the preceding claims 1 to 6, characterized in that the fastening part ( 101 ) a guide part ( 106 ), with which the axial securing device ( 100 ) at the armature shaft ( 17 ) is guided. Starting device ( 1 ) according to one of the preceding claims 1 to 7, characterized in that a passage ( 103 ) of the axial securing device ( 100 ), in particular one of the fastening part ( 101 ) and / or the elastic part projecting therefrom ( 102 ) or the elastic parts projecting therefrom ( 102 ) limited passage ( 103 ), through which the armature shaft ( 17 ) extends, a lower inner dimension than the outer dimension ( 17b ) the armature shaft ( 17 ), so that when plugged anchor shaft ( 17 ) the fastening part ( 101 ) leading and / or the elastic part ( 102 ) resiliently deformed on the armature shaft ( 17 ) is present. Starting device ( 1 ) according to one of the preceding claims 1 to 8, characterized in that the axial securing device ( 100 ) as Krallbuchse ( 100b ) or as a claw disc ( 100a ) is trained. Method for axially securing an armature shaft ( 17 ) a starting device ( 1 ), wherein an axial securing device ( 100 ) according to one of the preceding claims 1 to 9 with the fastening part ( 101 ) on or in a commutator bearing ( 114 ) and / or adjacent to a socket ( 113 ) and the armature shaft ( 17 ) through a passage ( 103 ) of the axial securing device ( 100 ) is pushed through, so that the elastic part ( 102 ) the armature shaft ( 17 ) and when inserting the armature shaft ( 17 ) is deformed springs without lifting the contact.

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