DE102016116922A1 - Axial securing for a shaft arrangement - Google Patents

Abstract

Axial securing device (1) for a shaft arrangement (2), comprising at least one securing ring (4) which is annular in a circumferential direction (3) and extending along an axial direction (5) from a first end face (6) over a bearing surface (7) a second end face (8), wherein the securing ring (4) at both end faces (6, 8) each have at least one, in a radial direction (9) inwardly facing projection (10, 11); wherein the axial securing device (1) further comprises a fixing element (12) through which the first projection (10) on a predetermined first diameter (13) and the second projection (11) on a, to the first diameter (13) arranged coaxially, predetermined second diameter (14) is fixable.

Description

The present invention relates to an axial securing device for a shaft assembly. A shaft assembly comprises at least a first shaft and a second shaft, wherein the first shaft is arranged inserted in the second shaft. The shafts are fixed by the axial securing in a, in the axial direction to each other predetermined axial position. The invention also includes a shaft-hub arrangement, wherein the shaft (first shaft) is arranged inserted in the hub (second shaft).

Typically, such axial securing means includes a locking ring disposed in a groove on an outer peripheral surface of the first shaft. When the shafts are pushed together, the circlip is compressed so that the first shaft can be pushed into the second shaft. As soon as the circlip has reached a groove arranged in the inner peripheral surface of the second shaft, the circlip springs up and also adjoins in this groove, so that a further displacement of the shaft relative to one another is prevented. The problem here is a renewed release of the connection.

Other axial fuses include a sleeve that slides onto both shafts. This sleeve can be connected by clamping elements frictionally connected to the waves.

Known axial locks also usually require a lot of space (especially in the axial direction) and / or offer (even) only an insufficient seal in the desired quality.

On this basis, it is an object of the present invention, at least alleviate or even solve the problems described with reference to the prior art. In particular, a re-releasable axial securing is to be proposed, which is simple and has a low additional weight. Next should also be via the axial securing a seal of the shaft assembly, so a seal of the connection between the first shaft and second shaft, guaranteed.

To solve these problems contributes an axial lock according to the features of the independent claim. Advantageous developments are the subject of the dependent claims. The features listed individually in the claims can be combined in a technologically meaningful manner and can be supplemented by explanatory facts from the description and details of the figures, with further embodiments of the invention are shown.

An axial securing device for a shaft arrangement is proposed, comprising at least one annular ring which is annular in a circumferential direction and extends along an axial direction from a first end face via a bearing surface to a second end face, wherein the retaining ring at least one, in one Radial direction inwardly facing first projection and on the second end face has at least one, in the radial direction inwardly facing second projection. The axial securing device furthermore has a fixing element, by means of which the first projection on a predetermined first diameter and the second projection on a first diameter, coaxially arranged, predetermined second diameter can be fixed.

In particular, the axial securing is therefore constructed in two parts (retaining ring, fixing element). Preferably, the fixing element is detachably connectable to the securing ring. Alternatively, the fixing element is a disposable part, which must be replaced after a single use (the fixing is then destroyed in particular when releasing the axial securing). The fixing element is arranged on the bearing ring, in particular on the bearing surface, that is to say in the axial direction between the end faces.

In particular, the retaining ring is elastically deformable at least in the circumferential direction, so that by arrangement of the fixing an opening width (ie a smallest diameter of the locking ring, which is important for the sliding of the axial lock on a shaft of the security ring of the retaining ring is reducible and in particular the projections on each smaller diameters, namely the first and the second diameter, can be arranged. The locking ring can be made open or closed in the circumferential direction.

In particular, the first projection is designed to be engageable with the shaft which is (smaller and) insertable into the other shaft of the shaft assembly. In particular, the second projection is designed to be engageable with the shaft which is (larger and) able to partially accommodate the other shaft of the shaft assembly. Preferably, the first protrusion preferably extends radially inwards, starting from the support surface, than the second protrusion. The first end face can be designed with a chamfer or a curvature in a transition area between the bearing surface and the first projection. The second end face can be designed with a curvature in a transition area between the bearing surface and the second end face, the curvature in particular comprising a bend of more than 90 ° or even at least 110 ° [angular degree].

The securing ring is preferably in one piece and / or itself has no joints or joint seams. Preferably, the retaining ring is produced with a single sheet metal part and formed by deformation.

It may be provided in each case a plurality of first projections and second projections, which are integrally formed with the locking ring of the axial securing. The number of first protrusions and second protrusions is preferably equal to or different than a maximum of two. It is preferred that the first projections and / or the second projections cover or form at least 80% of the respective end face.

In particular, the securing ring is formed by a meandering in the circumferential direction strip material with segments, wherein adjacently arranged circumferentially segments of the strip material are alternately connected to each other at the first end side or on the second end side. The strip material is in particular made of a plastic or of a metallic material.

The meandering configuration of the strip material allows an elastic deformation of the securing ring (before the arrangement of the fixing element), so that a sliding of the locking ring is made possible on a shaft. Meandering means in particular that the segments are connected to each other in the circumferential direction, wherein the compounds of the segments z. B. in the axial direction and / or the radial direction are offset from one another.

In particular, each segment has at least one projection and the adjacently arranged segments are (exclusively) connected to one another via adjacently arranged projections.

The projections are arranged on the end sides of the securing ring. In a meander-shaped configuration, two projections of adjacent segments on the first end side and two projections of adjacent segments on the second end side are alternately connected to one another along the circumferential direction.

Preferably, the fixing element is annular and circumferentially circumferentially on the support surface can be arranged. The fixing element then surrounds the securing ring so that it is reduced in diameter and the first projection on a predetermined first diameter and the second projection on a, to the first diameter coaxially arranged, predetermined second diameter is fixable.

In particular, the fixing element can be pushed along the axial direction onto the securing ring. The fixing element has at least one, at least in the radial direction deformable latching element, which is supported after being pushed on a first axial stop on an end face of the securing ring. In particular, the first axial stop is formed by the end face of the securing ring, over which the fixing element has been pushed onto the securing ring. Fixing element and retaining ring are preferably designed so that the fixing element rests at least partially radially on the outside of the support surface and the fixing element penetrates the locking ring at least or extending between the segments therethrough.

In particular, the fixing element has a multiplicity of locking elements distributed uniformly in the circumferential direction.

According to a preferred embodiment, the securing ring at least between the support surface and an end face (preferably between the support surface and each end face) at least one, in the radial direction outwardly extending survey, which forms a second axial stop for the fixing at least in the axial direction ,

In particular, the at least one elevation in the radial direction extends outwardly so far and / or is arranged multiply or circumferentially along the circumferential direction, so that the fixing element, even before the axial securing device is arranged in an installed position, can be arranged captive on the retaining ring.

In particular, a "protrusion" is understood to mean a bulge of the securing ring extending in the circumferential direction over the contact surface. A survey may be formed in particular near the first end face and / or the second end face. The survey can be formed in each case with a plurality of segments and / or projections.

A captive arrangement allows the formation of a pre-assembly consisting of the retaining ring and the fixing element.

According to a preferred refinement, a seal running around in the circumferential direction is arranged between the end faces and in the radial direction within the bearing surface. In particular, the seal seals the circumferential gap between the first shaft and the second shaft which are interconnected by the axial lock.

The seal is connected to the circlip in at least one of the following ways: non-positive, positive, cohesive. Positive connections require a normal force on the surfaces to be joined together. Their mutual displacement is prevented, as long as the counter-force caused by the static friction is not exceeded. Form-fitting connections are created by the interaction of at least two connection partners. As a result, the connection partners can not solve without or with interrupted power transmission. In other words, in the case of a positive connection, one connection partner gets in the way of the other. Cohesive connections are all compounds in which the connection partners are held together by atomic or molecular forces. They are at the same time non-detachable connections, which can only be separated by destruction of the connecting means.

The seal can be cast into the retaining ring, so that there is an adhesive or even cohesive connection between the seal and retaining ring. The seal can also be inserted in the retaining ring and create as a result of an elastic configuration of the seal to the retaining ring. Alternatively or additionally, the seal may be clamped by the circlip or glued into the circlip.

It is further proposed a shaft assembly, at least comprising a first shaft and a second shaft, wherein the first shaft is arranged inserted in the second shaft. Both shafts have at least one recess on a respective outer circumferential surface; wherein the newly proposed and described above axial securing extends circumferentially around both shafts; wherein the at least one first projection in the first recess and the at least one second projection is arranged in the second recess, so that the shafts are arranged by the axial securing in a, in the axial direction to each other predetermined axial position.

In particular, at least one of the recesses (or both) is circumferential in the circumferential direction, so that accurate positioning of the shafts in the circumferential direction is not required. However, at least one recess (or both) can also be executed interrupted in the circumferential direction, so that a positioning of the shafts predetermined in the circumferential direction can be predetermined to one another.

The shaft arrangement is intended in particular for use in motor vehicles.

It is therefore also proposed a motor vehicle, which comprises at least one shaft arrangement specified above.

The invention and the technical environment will be explained in more detail with reference to the figures. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. The same reference numerals designate the same objects, so that explanations of other figures can be used if necessary. They show schematically:

1 a first embodiment of a shaft assembly in a side view;

2 : the shaft arrangement after 1 in a side view in section;

3 : a view (from left) of the shaft assembly after 1 and 2 along the axial direction;

4 : a detail A off 2 with a shaft arrangement after 1 to 3 in a side view in section;

5 a second embodiment of a shaft assembly in a side view in section;

6 a third embodiment of a shaft assembly in a side view;

7 : a view (from left) of the shaft assembly after 6 along the axial direction;

8th : the shaft arrangement after 6 and 7 in a side view in section;

9 : a detail A off 8th with a shaft arrangement after 6 and 7 in a side view in section;

10 : a locking ring of the axial lock after 6 to 9 in a side view;

11 : the circlip after 10 in a view (from the left) along the axial direction;

12 : the circlip after 10 and 11 in a side view, in section;

13 : a detail A off 12 with a circlip after 10 to 12 in a side view in section;

14 a seal of the shaft assembly after 8th in a side view in section;

15 : a detail of the seal according to 14 ;

16 : a fixing element of the shaft assembly according to 6 to 9 in a view along the axial direction;

17 : the fixing element after 16 in a side view; and

18 : the fixing element after 16 and 17 in a side view in section.

1 shows a first embodiment of a shaft assembly 2 in a side view. The wave arrangement 2 includes a first wave 24 and a second wave 25 , where the first wave 24 in the second wave 25 partially inserted is arranged. The axial securing 1 is in the installation position 22 on the waves 24 . 25 arranged and extends circumferentially around both waves 24 . 25 so the waves 24 . 25 through the axial securing 1 in one, in the axial direction 5 mutually predetermined axial position 30 are arranged. The axial securing 1 includes one in the circumferential direction 3 annular circlip 4 moving along an axial direction 5 from a first end face 6 via a support surface (on the support surface here is the fixing element 12 arranged) to a second end face 8th extends. The circlip 4 has at both ends 6 . 8th each at least one, in a radial direction 9 inward pointing ahead.

2 shows the shaft arrangement 2 to 1 in a side view in section. In the circumferential direction 3 is the first wave 24 with the second wave 25 positively connected via a spline. In the axial direction 5 are the waves 24 . 25 through the axial securing 1 in an axial position 30 fixed to each other.

The axial securing 1 includes one in a circumferential direction 3 annular circlip 4 moving along an axial direction 5 from a first end face 6 over a support surface 7 (please refer 4 ) to a second end face 8th extends. The circlip 4 points to the first front page 6 in a radial direction 9 inwardly facing first protrusions 10 and at the second end face 8th in the radial direction 9 inwardly facing second protrusions 11 on. The axial securing 1 continues to indicate, on the support surface 7 arranged fixing 12 through, through which the first projection 10 on a predetermined first diameter 13 and the second projection 11 on one, to the first diameter 13 coaxially arranged, predetermined (here: larger) second diameter 14 can be fixed.

Both waves 24 . 25 have at a respective outer first peripheral surface 26 and second peripheral surface 27 a first recess 28 or a second recess 29 on. The first advantage 10 is in the first recess 28 and the second projection 11 is in the second recess 29 arranged so that the waves 24 . 25 through the axial securing 1 in one, in the axial direction 5 mutually predetermined axial position 30 are held.

Between the front sides 6 . 8th and in the radial direction 9 within the bearing surface 7 is one, in the circumferential direction 3 circumferential seal 23 arranged. The seal 23 seals the circumferential gap between the first shaft 24 and the second wave 25 off, by the axial securing 1 connected to each other.

3 shows a view (v. left) of the shaft assembly 2 to 1 and 2 in the axial direction 5 , On the first wave 24 The first projections extend 10 in the first recess 28 on the first peripheral surface 26 , The circlip 4 is through one in the circumferential direction 3 meandering strip material 16 with segments 17 educated. In the circumferential direction 3 adjacent segments arranged 17 of the band material 16 are alternately on the first front side 6 or on the second front side 8th connected with each other. The meandering configuration of the strip material 16 allows elastic deformation of the locking ring 4 (before the arrangement of the fixing element 12 ), allowing a sliding of the circlip 4 on a wave 24 . 25 is possible. "Meandering" here means that the segments 17 in the circumferential direction 3 are interconnected, the connections of the segments 17 in the axial direction 9 and in the radial direction 5 offset from one another.

Here each segment forms 17 one projection each 10 . 11 , wherein the adjacent arranged segments 17 are interconnected exclusively via adjacently disposed adjacent projections.

The projections 10 . 11 are on the front ends 6 . 8th of the circlip 4 arranged. In the meandering configuration along the circumferential direction 3 alternately two first protrusions 10 adjacent segments 17 at the first end 6 and two second protrusions 11 adjacent segments 17 on the second front side 8th each connected to each other.

4 shows a detail A from 2 with a shaft arrangement 2 to 1 to 3 in a side view in section. On the comments too 2 will be referred.

Both waves 24 . 25 have on a respective outer peripheral surface 26 . 27 a recess 28 . 29 on. The first advantage 10 is in the first recess 28 and the second projection 11 is in the second recess 29 arranged so that the waves 24 . 25 through the axial securing 1 in one, in the axial direction 5 mutually predetermined axial position 30 are arranged.

The circlip 4 points between the support surface 7 and every front side 6 . 8th one, in the radial direction 9 outward extending survey 20 on that for the fixing element 12 at least in the axial direction 5 a second axial stop 21 forms. The assessment 20 formed with a plurality of segments extends in the radial direction 9 outwards over the support surface 7 ,

5 shows a second embodiment of a shaft assembly 2 in a side view in section. On the comments too 1 to 4 will be referred. In contrast to the first embodiment, the seal 23 here in the circlip 4 poured in and thus in the axial direction 5 positive and in the radial direction 9 as well as in the circumferential direction 3 non-positively with the retaining ring 4 connected.

6 shows a third embodiment of a shaft assembly 2 in a side view. 7 shows a view (v. left) of the shaft assembly 2 to 6 in the axial direction 5 , 8th shows the shaft arrangement 2 to 6 and 7 in a side view in section. 9 shows a detail A from 8th with a shaft arrangement 2 to 6 and 7 in a side view in section. The 6 to 9 will be described together below. On the comments too 1 to 4 will be referred.

In contrast to the first embodiment of a shaft arrangement 2 here is the fixing element 12 along the axial direction 5 on the circlip 4 pushed on. The fixing element 12 has a plurality of, in the radial direction 9 deformable locking elements 18 on, which after pushing on a first axial stop 19 on a front side 6 of the circlip 4 support. The fixing element 12 extends, starting from the support surface 7 on the circlip 4 , with locking elements 18 in the radial direction 9 inside, through openings between the segments 17 of the circlip 4 therethrough. The first axial stop 19 gets through the front 6 of the circlip 4 formed over which the fixing element 12 on the circlip 4 was postponed. The fixing element 12 has a plurality, in the circumferential direction 3 evenly distributed locking elements 18 on. The locking elements 18 arrange themselves between the segments 17 of the circlip 4 at.

10 shows a circlip 4 the axial securing 1 to 6 to 9 in a side view. 11 shows the circlip 4 to 10 in a view in the axial direction 5 , 12 shows the circlip 4 to 10 and 11 in a side view, in section. 13 shows a detail A from 12 with a locking ring 4 to 10 to 12 in a side view in section. The 10 to 13 will be described together below.

The circlip 4 is through one in the circumferential direction 3 meandering strip material 16 with segments 17 educated. In the circumferential direction 3 adjacent segments arranged 17 of the band material 16 are alternately on the first front side 6 or on the second front side 8th connected with each other. The meandering configuration of the strip material 16 allows elastic deformation of the locking ring 4 (before the arrangement of the fixing element 12 ), allowing a sliding of the circlip 4 on a wave 24 . 25 is possible.

By arrangement of the fixing element 12 (see eg 9 ) is an opening width 15 (ie a smallest diameter of the circlip 4 , which is for pushing the axial lock 1 on a wave 24 . 25 is important) of the locking ring 4 reducible. Meandering here means that the segments 17 in the circumferential direction 3 are interconnected, the connections of the segments 17 in the axial direction 5 and in the radial direction 9 offset from one another.

Here each segment forms 17 one projection each 10 . 11 , wherein the adjacent arranged segments 17 exclusively over adjacently arranged adjacent projections 10 . 11 connected to each other.

The projections 10 . 11 are on the front ends 6 . 8th of the circlip 4 arranged. In the meandering configuration along the circumferential direction 3 alternately two first protrusions 10 adjacent segments 17 at the first end 6 and two second protrusions 11 adjacent segments 17 on the second front side 8th each connected to each other.

The circlip 4 points between the support surface 7 and the second end face 8th one, in the radial direction 9 outward extending survey 20 on that for the fixing element 12 at least in one of the axial directions 5 a second axial stop 21 forms. The surveys 20 rise in the radial direction 9 over the support surface 7 ,

The different embodiments of the axial securing are each easy to manufacture, repeatable mountable and / or disassembled and can be easily arranged on a shaft assembly. Thus, two shafts of a shaft assembly can be arranged with little effort in a (fixed) axial position to each other. At the same time, the gap between the two shafts can be sealed by means of a seal possibly contained in the axial lock.

14 shows a seal 23 the shaft arrangement 1 to 8th in a side view in section. 15 shows a detail of the seal 23 according to 14 , The 14 and 15 will be described together below.

The seal 23 is in the circumferential direction 3 executed circumferentially and is between the end faces 6 . 8th and in the radial direction 9 within the bearing surface 7 of the circlip 4 arranged (see 2 . 4 . 5 . 8th and 9 ). The seal 23 seals the circumferential gap between the first shaft 24 and the second wave 25 off, by the axial securing 1 are interconnected (see 4 . 5 and 9 ).

16 shows a fixing element 12 the shaft arrangement after 6 to 9 in a view along the axial direction 5 , 17 shows the fixing element 12 to 16 in a side view. 18 shows the fixing element 12 to 16 and 17 in a side view in section. The 16 to 18 will be described together below.

The fixing element 12 has a plurality of, in the radial direction 9 deformable locking elements 18 on, which after pushing on a first axial stop 19 on a front side 6 of the circlip 4 support (see 6 ). The fixing element 12 extends, starting from the support surface 7 on the circlip 4 , with locking elements 18 in the radial direction 9 inside, through openings between the segments 17 of the circlip 4 therethrough. The first axial stop 19 gets through the front 6 of the circlip 4 formed over which the fixing element 12 on the circlip 4 was postponed. The fixing element 12 has a plurality, in the circumferential direction 3 evenly distributed locking elements 18 on. The locking elements 18 arrange themselves between the segments 17 of the circlip 4 at.

LIST OF REFERENCE NUMBERS

1

 axial safety

2

 shaft assembly

3

 circumferentially

4

 circlip

5

 axial direction

6

 first end face

7

 bearing surface

8th

 second end face

9

 radial direction

10

 first advantage

11

 second lead

12

 fixing

13

 first diameter

14

 second diameter

15

 opening width

16

 band material

17

 segment

18

 locking element

19

 first axial stop

20

 survey

21

 second axial stop

22

 installation position

23

 poetry

24

 first wave

25

 second wave

26

 first peripheral surface

27

 second peripheral surface

28

 first recess

29

 second recess

30

 axial position

Claims (11)

Axial securing ( 1 ) for a shaft arrangement ( 2 ), at least comprising one in a circumferential direction ( 3 ) annular locking ring ( 4 ) extending along an axial direction ( 5 ) from a first end face ( 6 ) over a support surface ( 7 ) to a second end face ( 8th ), wherein the retaining ring ( 4 ) at the first end face ( 6 ) at least one, in a radial direction ( 9 ) inward-pointing first projection ( 10 ) and at the second end face ( 8th ) at least one, in the radial direction ( 9 ) inward pointing second projection ( 11 ) having; whereby the axial securing ( 1 ) further a fixing element ( 12 ), through which the first projection ( 10 ) on a predetermined first diameter ( 13 ) and the second projection ( 11 ) on one, to the first diameter ( 13 ) coaxially arranged, predetermined second diameter ( 14 ) is fixable. Axial securing ( 1 ) according to claim 1, wherein the retaining ring ( 4 ) at least in the circumferential direction ( 3 ) is elastically deformable, so that by arrangement of the fixing element ( 12 ) an opening width ( 15 ) of the retaining ring ( 4 ) is reducible. Axial securing ( 1 ) according to one of the preceding claims, wherein the retaining ring ( 4 ) by, in the circumferential direction ( 3 ) meandering strip material ( 16 ) with segments ( 17 ) is formed, wherein in the circumferential direction ( 3 ) adjacent segments ( 17 ) of the strip material ( 16 ) alternately on the first front side ( 6 ) or on the second end face ( 8th ) are interconnected. Axial securing ( 1 ) according to claim 3, wherein each segment ( 17 ) at least one projection ( 10 . 11 ) and the adjacent segments ( 17 ) via adjacently arranged first projections ( 10 ) or second projections ( 11 ) are interconnected. Axial securing ( 1 ) according to one of the preceding claims, wherein the fixing element ( 12 ) is annular and in the circumferential direction ( 3 ) circumferentially on the support surface ( 7 ) can be arranged. Axial securing ( 1 ) according to claim 5, wherein the fixing element ( 12 ) along the axial direction ( 5 ) on the retaining ring ( 4 ) is deferrable; wherein the fixing element ( 12 ) at least one, at least in the radial direction ( 9 ) deformable locking element ( 18 ), which after pushing on a first axial stop ( 19 ) on a front side ( 6 . 8th ) of the retaining ring ( 4 ) is supported. Axial securing ( 1 ) according to one of the preceding claims, wherein the retaining ring ( 4 ) at least between the bearing surface ( 7 ) and a front side ( 6 . 8th ) at least one, in the radial direction ( 9 ) outward survey ( 20 ), which for the fixing element ( 12 ) at least in the axial direction ( 5 ) a second axial stop ( 21 ). Axial securing ( 1 ) according to claim 7, wherein the at least one survey ( 20 ) at least - in the radial direction ( 9 ) extends so far outward; or - along the circumferential direction ( 3 ) is arranged multiple times or circumferentially; that the fixing element ( 12 ), even before the axial lock ( 1 ) in an installation position ( 22 ), captive on the retaining ring ( 4 ) can be arranged. Axial securing ( 1 ) according to one of the preceding claims, wherein between the end faces ( 6 . 8th ) and in the radial direction ( 9 ) within the bearing surface ( 7 ) one, in the circumferential direction ( 3 ) circumferential seal ( 23 ) is arranged. Axial securing ( 1 ) according to claim 9, wherein the seal ( 23 ) with the retaining ring ( 4 ) at least - non-positively; or - form-fitting; or - is cohesively connected. Shaft arrangement ( 2 ), at least comprising a first wave ( 24 ) and a second wave ( 25 ), the first wave ( 24 ) in the second wave ( 25 ) is inserted inserted; where both waves ( 24 . 25 ) on a respective outer peripheral surface ( 26 . 27 ) at least one recess ( 28 . 29 ) exhibit; whereby the axial securing ( 1 ) according to one of the preceding claims, circulating around both shafts ( 24 . 25 ) extends; wherein the at least one first projection ( 10 ) in the first recess ( 28 ) and the at least one second projection ( 11 ) in the second recess ( 29 ) is arranged so that the waves ( 24 . 25 ) by the axial securing ( 1 ) in one, in the axial direction ( 5 ) to each other predetermined axial position ( 30 ) are arranged.

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