DE102008028102A1 - Adjustable fitting for adjusting backrest provided opposite to lower part of vehicle seat, has outer wheel formed as hollow wheel with base, and retaining element axially movable against inner wheel and supporting inner wheel against base - Google Patents

Abstract

The fitting (1) has a part (3) adjustable relative to another fitting part (2) around a rotary axis (A). An outer wheel (4) with an inner tooth system (12) is attached to the part (2). An inner wheel (7) formed as a cold extruded part forms an eccentric receiving area (25) around the axis. The wheel (4) is formed as a hollow wheel (5) with a base (9) and an outer wall (10) that extends in an axial direction over the system. A retaining element (23) i.e. retaining ring, axially movable against the wheel (7) is provided in the wall, and supports the wheel (7) against the base.

Description

The The invention relates to an adjustment fitting, in particular for a vehicle seat, with a first fitting part, with a relative to the first fitting part about a rotation axis second adjustable Fitting part, wherein the first fitting part an outer wheel is associated with an internal toothing, in which a the second Fitting part associated with internal gear with external teeth used in the manner of a wobble gear eccentric to the axis of rotation is, and wherein the inner wheel to the rotation axis an eccentric receiving space forms, with a rotatably inserted into the eccentric receiving space Eccentric and with a drive shaft for driving the eccentric.

Such adjustment fitting is for example from the DE 100 21 403 C2 , of the DE 31 30 315 C2 or the DE 28 34 529 C2 known. In this case, the first fitting part and the second fitting part are assembled in the manner of a wobble mechanism, wherein, when the eccentric is driven, the inner wheel wobbles about its outer toothing on the inner toothing of the outer wheel. The number of teeth of the external teeth is reduced compared to the number of teeth of the internal teeth. In one complete revolution of the eccentric results in a relative rotation of the inner wheel relative to the outer wheel to the tooth difference. An adjustment fitting with wobble gear has prevailed in vehicle technology for adjusting the backrest relative to the seat bottom of a vehicle seat. A wobble mechanism can be realized with comparatively few mechanical components and, with a flat construction at the same time, permits a translation desired for the adjustment.

The Fittings or the inner and the outer wheel of such Adjustment fittings are in the assembled state in the axial direction held together. These are the most varied from the prior art Holding means known. Is the axial clearance between the fitting parts too big, it comes to unwanted rattling noises, what the occupant of a vehicle may be worrying about or at least feels a loss of comfort. On the other hand, that is Axial clearance between the fittings too small, so must for adjustment the fitting overcame an unnecessarily high frictional force become.

From the mentioned DE 100 21 403 C2 is for the axial cohesion of the fitting parts, a two fitting parts cross-locking ring is known, which is rotatably connected via a polygonal positive connection with at least one of the fitting parts.

According to the DE 10 105 282 B4 the fitting parts of a Verstellbeschlags are held together axially via a retaining ring, wherein a fitting part is pressed into the retaining ring. This should be a simpler installation allows. In addition, it is proposed to form the retaining ring inside with a step to which the fitting part is pressed. Through the stage, the axial play of the fitting is adjustable.

From the DE 31 30 315 C2 is known for the axial cohesion of the two fitting parts of a Verstellbeschlags the use of a dish washer, which is firmly connected to a fitting part. In this case, the rim forms an internal toothing, which meshes with a protruding outer toothing of the inner wheel. For the axial cohesion of the fitting parts, the plate disc is engaged behind by a holding member, which is pressed into slots of the other fitting part and connected in a play-free position with this fitting part.

Finally, in the DE 28 34 529 C2 discloses a bearing plate for the axial cohesion of the fitting parts of a Verstellbeschlags, which has lateral bends, which engage over the two fittings laterally. During assembly, the fitting parts are compressed without play and the outer fitting part firmly connected in this position with the lateral bends.

task The invention is an adjustment fitting of the aforementioned Specify a type that allows easy adjustment of the axial play between the Outer wheel and the inner wheel allows.

These Object is achieved by an adjustment fitting solved with the combination of features according to claim 1. Accordingly, it is provided, the outer wheel as a ring gear with a bottom and with one in the axial direction over the Internal gearing extended outside wall form, and in the outer wall axially displaceable against the inner wheel Provide retaining element which is attached to the outer wall is and the inner wheel bears against the bottom of the ring gear.

During assembly, the inner wheel is axially inserted into the ring gear until reaching the bottom and then tracked the holding element in the interior of the ring gear, so that the inner wheel between the bottom and the support member is mounted. Due to the axial displaceability of the retaining element, the axial clearance of the inner wheel relative to the outer wheel on the outer wheel is adjustable up to a zero clearance. If the desired position of the holding element relative to the bottom of the outer wheel is reached, the holding element is fixed to the outer wall. In particular, this can be done by means of a suitable welding technique. In front Partially, the fixing of the retaining element in the outer wheel by means of laser welding. Of course, an attachment by means of gluing or soldering is alternatively conceivable. The connection of the retaining element with the outer wall of the outer wheel can be made punctiform or circumferential. In other words, the ring gear on an opposite the outer wall axially recessed internal teeth.

The Adjustment of the desired position of the retaining element opposite the bottom of the outer wheel can hereby both controlled by force. In the case of a force-controlled Setting become production-related tolerances in the axial Height of the inner wheel balanced. On the other hand allows a path-controlled determination of the desired position by varying the axial thickness of the inner wheel with otherwise identical Components in the strength changeable variants. For example in a path-controlled determination of the position of the holding element increases the thickness of the inner wheel, it results from this a strength-enhanced adjustment fitting.

It is not necessary to design the floor over the entire surface. Basically, it is sufficient to use the ground as a support to train for the inner ring. This is sufficient correspondingly shaped edge or a correspondingly designed one Subarea. Preferably, however, the soil closes the interior of the ring gear substantially. That way that can Ring gear at the same time an outer boundary of the adjustable fitting form. The interior and thus the wobble gear is against dirt and the like protected.

For The invention also does not require that the axial width the internal toothing of the axial width of the external toothing equivalent. For example, the entire inner wheel opposite the width of the external teeth have reduced thickness and by means of bent portions of the retaining element stored on the outer teeth over against the ground become. On the other hand, it is also conceivable that the external teeth a relative to the internal toothing increased axial Width, and the inner wheel on the radially projecting External toothing is counter-supported on the holding element. at This configuration can in particular the external toothing mounted on a kind of flange, over which the inner wheel is mounted against the retaining element. The storage of the inner wheel over the external toothing on the retaining element is so far an advantageous variant, since the holding element then comparatively easy to run.

In a preferred embodiment of the adjustable fitting includes the Inner wheel one in the axial direction over the external toothing also extended inner wall, which holds the retaining element in the axial direction penetrates, wherein the inner wheel on the inner wall of the associated with the second fitting part. In this variant stands out extended inner wall in the assembled state of the adjustable fitting in the axial direction beyond the retaining element, so that it easily with the second fitting part or with a corresponding one Adapter for connection to the vehicle seat can be connected. Further advantageous for this purpose is when the inner wall in the axial direction is further extended, and the outer wall towers over. In this case, a simplified attachment to the projecting inner wall where. The connection with the second fitting part or a Adapter can turn by gluing, welding or soldering respectively. Also preferred here is the technique of laser welding use.

For a stable and increased crash resistance Variant is both the outer wall of the outer wheel and the inner wall of the inner wheel circumferentially formed, wherein the retaining element with a complementary to the outer wall Outside border used in the outer wall and there circumferentially connected to this firmly. A peeling such a connection in the case of a strong force application on the fittings is as good as impossible. The inner wheel is safe between the bottom of the outer wheel and the one with stored or guided connected to the outer wall holding element.

Regarding the outer contour of the outer and the inner wall exist basically no constraints. Both the foreign as well as the inner wall can become an imaginary or existing base area each be continued axially prismatic. In particular, too polygonal peripheral contours conceivable.

In a preferred embodiment, the outer wall of the Ring gear and the inner wall of the inner wheel each as a cylinder wall educated. Due to the rotationally symmetrical design of the components is a simpler manufacturing allows. Also needs when assembling the components not to a defined Rotational position of these are respected each other.

Conveniently, the retaining element is designed as a retaining ring or a retaining disc, the or the inner wheel or its outer toothing at least running around the edge. Due to the rotational symmetry is thereby a safe and stable storage of the inner wheel in the outer wheel where.

Appropriately, a central collar is formed at the bottom of the ring gear, so that the eccentric receiving space is formed between the collar and the inner wheel. In such a collar train, for example, the drive shaft for the adjustment fitting is performed safely. On the other hand, such a collar train offers the possibility of providing a plain bearing bush for mounting the eccentric.

Prefers is the eccentric in the eccentric receiving space here between an inner and an outer plain bearing bush stored. Such storage by means of plain bearing bushing reduces the Friction of the rotating eccentric against the outer and the inner wheel.

In the eccentric receiving space can be a rigid or a variable Total eccentricity forming eccentric be used. In particular, for the formation of a variable total eccentricity are different versions of the prior art known. In a particularly advantageous embodiment are in the receiving space two a variable total eccentricity forming, mutually rotatable parts eccentricities used, that for the formation of a maximum total eccentricity biased to each other, wherein further one with the drive shaft rotatably connected driver is provided in the case of a drive acts on the part eccentricities against the bias. If the drive shaft is not actuated, the parts eccentricities biased to form the maximum total eccentricity. In this position, the eccentric pushes the inner wheel in Essentially backlash against the outer wheel, leaving a unwanted movement of the two fitting parts to each other more difficult is. When the drive shaft is moved, the parts eccentricities twisted against the bias, thereby increasing the overall eccentricity reduced. Between the inner and the outer wheel arises a game, allowing the adjustment of the fitting parts to each other is possible.

As already mentioned, is in a preferred embodiment the holding element with the outer wall of the ring gear and with welded to the second fitting part or a corresponding adapter, wherein Preferably, the method of laser welding is used. For example, this can be done by means of a circumferential fillet weld become.

to Storage of the components of the adjustment fitting is expediently a continuous journal provided on which in particular by means of of the mentioned central collar pull the outer wheel is stored.

Further preferred is the first fitting part, in particular the ring gear, a backrest adapter, and the second fitting part, in particular the Inner wheel, a seat adapter connected, in particular welded. As the adjustment fitting as such, no specific components for a particular vehicle seat, this may be used in many ways. About attaching a seat or a backrest adapter, the adjustment fitting for vehicle seats different model variants are used. At the specified Configuration, the inner wheel remains fixed seat, while the outer wheel including the drive shaft staggers at an adjustment. The tethered backrest moves in the same direction with the drive shaft.

So far Be the outer and inner one with a wobble gear equipped adjustable fitting designed as fine cutting parts, which are deformed accordingly. Such manufactured indoor and Outer wheels have approximately at all points constant material thickness, which is essentially the original one Sheet thickness corresponds. However, a constant material thickness will not the actual loads. Also allows one such production no tolerance exact positioning different Geometries on the component, such as the location of a lengthened Wall opposite a toothing.

The described disadvantages of the previous production methods for Production of an outer or an inner wheel for however, a wobble gear can be overcome when the inner wheel or the outer wheel each as a cold extruded part getting produced. Extrusion is one Massive forming, by a single-stage or multi-stage manufacturing process created both hollow and solid body. in principle In this process, the material, in particular metal, under the action caused a high pressure to flow. It pushes a stamp the workpiece blank by a formge bende, in cross section reduced tool opening, a die. The reshaping itself usually takes place at room temperature, so that one speaks of a cold extrusion. This is a high Dimensional accuracy and a high surface quality reached.

Of the Advantage of using cold extrusion for manufacturing of the inner wheel and / or the outer wheel for a Adjustable fitting is possible for strength-optimized constructions that may be Provide weight advantages. By material savings can In addition, cost advantages are achieved. In addition, through the use of cold extrusion narrower tolerances the teeth and the coaxiality are realized, thereby the homogeneity of the operation of the adjustable fitting is improved. Since it is an adjustment fitting to a mass component cost advantages are achieved by having only one more Tool is needed for manufacturing.

at allowed the aforementioned inner wheel with extended inner wall the cold extrusion in particular a facilitated production a geometry, wherein the external toothing of a circumferential Ring is covered. As a result, the teeth are connected circumferentially, so that the strength is increased with the same space. A appropriate geometry can be used with other cold forming processes not achieve. At best, a machining process comes into question.

For an external gear, which in this case formed as a ring gear is, allows the use of cold extrusion the reinforcement of the material on particularly heavily loaded areas. This can, for example, in the area of the inner collar or be provided in the field of gearing.

One Embodiment of the invention is based on a drawing explained in more detail. Showing:

1 in an exploded view an adjustment fitting for a vehicle seat, wherein the outer wheel is formed as a ring gear, in which the inner wheel is counter-supported by means of a holding element,

2 the adjustment fitting according to 1 in a cross section,

3 an outer wheel made by cold extrusion in a cross section and

4 a manufactured by cold extrusion internal wheel in a cross section.

In 1 is an adjustment fitting in an exploded view 1 represented for a vehicle seat. The adjustment fitting 1 in this case comprises a first fitting part 2 and a second fitting part 3 , which are rotatable relative to each other about a rotation axis A. The first fitting part 2 consists of an outer wheel 4 , which for subsequent assembly to a seat back a corresponding backrest adapter 6 , in particular by means of a weld, is connected. The second fitting part 3 includes an inner wheel 7 and a seat adapter connected thereto 8th for connection to a seat base.

The outer wheel 4 is as a ring gear 5 with a floor 9 and a circumferential cylindrical outer wall 10 educated. On the inside of the outer wall 10 is an axially recessed internal toothing 12 intended. The outer wall 10 is in the axial direction via the internal toothing 12 extended beyond. Inside the ring gear 5 is still a collar 14 attached, which rotates a central bore. In the ring gear 5 becomes the inner wheel 7 inserted, which has a circumferential outer toothing 16 and one in the axial direction over the external teeth 16 also extended, cylindrical inner wall 18 includes.

For mounting the adjustable fitting 1 becomes the inner wheel 7 in the interior 20 of the ring gear 4 used. As the outer diameter of the inner wheel 7 opposite the inner diameter 12 of the ring gear 4 has a reduced diameter, the latter rolls tumbling under unrolling the external teeth 16 on the internal toothing 12 in the ring gear 5 from. The number of external teeth teeth 16 is opposite to the number of teeth of the internal teeth 12 decreases, so that the inner wheel 7 in a complete revolution with respect to the ring gear 5 relatively twisted around the tooth difference.

The inner wheel 7 becomes axial to the ground 9 in the ring gear 5 introduced. Subsequently, a holding element 23 which acts as a retaining ring 24 is formed, the inner wheel 7 in the interior 20 of the ring gear 5 tracked, it being the inner wall 18 of the inner wheel 7 encloses. The retaining ring 24 has a relation to the inner diameter of the outer wall 10 slightly reduced outside diameter. Its inner diameter allows the tumbling movement of the enclosed inner wall 18 of the inserted inner wheel 7 , The external toothing 16 of the inner wheel 7 located on a circumferential flange, over which the inner wheel 7 on the retaining ring 24 is counter-stored.

The retaining ring 24 becomes so far against the ground in the axial direction 9 of the ring gear 5 moves until a defined axial clearance of the inner wheel 7 is set. This can be done both force and path controlled. In a force-controlled insertion manufacturing tolerances in the axial width of the external teeth 16 balanced. In the desired end position of the retaining ring 24 circumferential with the inside of the outer wall 10 welded.

Through that in the ring gear 5 inserted inner wheel 7 is between the collar 14 and the inner wall 18 an eccentric recording room 25 formed for receiving a driving eccentric.

The seat adapter 8th includes an outer ring 27 , which has a central opening 28 the inner wall 18 of the inner wheel 7 overlaps. When assembled, the inner wall is 18 with the outer ring 27 of the seat adapter 8th firmly welded.

In the eccentric recording room 25 are a first Teilzzenter to form a variable total eccentricity 30 and a second part ter 32 set. These together the eccentric forming parts eccentric 30 . 32 be by means of an attached drive plate 34 twisted against each other, changing their overall eccentricity. For this purpose, the drive plate 34 lateral recesses 35 . 36 on, in the driving lugs 37 . 38 of the first and the second Teilxzenters 30 . 32 intervention. The parts eccentric 30 . 32 are by means of a spring element 40 biased to form a maximum total eccentricity, wherein in this position, the inner wheel 7 backlash against the outer wheel 4 is pressed.

To drive the adjustable fitting 1 is a continuous journal 42 provided, an eccentric, in the inner wall 18 laterally engaging lid 44 includes. In the lid 44 is to drive a square opening 45 inserted. The journal 42 is non-rotatable with the drive plate 34 connected. For holding the journal 42 is opposite a retaining ring 46 intended.

To the friction of the part eccentricities 30 . 32 on the collar 14 and on the inner wall 18 reduce, are an inner plain bearing bush 48 and an outer plain bearing bush 49 intended. The inner plain bearing bush 48 is the collar 14 placed. The outer plain bearing bush 49 is in the inner wall 18 used.

Upon actuation of the journal 42 be about the drive disc 34 the two partial eccentricities 30 . 32 moved to reduce the trained total eccentricity against the spring tension. This results in a game of the inner wheel 7 opposite the ring gear 5 , so that the eccentric under tumbling rolling of the inner wheel 7 in the ring gear 5 can be rotated. The fittings 2 . 3 relative to each other, the axis of rotation A is adjusted.

In 2 is the adjustment fitting 1 according to 1 shown in a cross section. You recognize the seat adapter 8th , the inner wheel 7 is tethered, and the backrest adapter 6 , which with the ring gear 5 is firmly connected.

The inner wheel 7 is in the outer wall 10 of the ring gear 4 used and between its bottom 9 and the retaining ring 24 stored. Here, the external teeth are supported 16 in the axial direction against the retaining ring 24 from. About the axial positioning of the retaining ring 24 is the axial play of the inner wheel 7 opposite the ring gear 5 set. The retaining ring 24 is in the set position with the outer wall 10 of the ring gear 5 welded. The seat adapter 8th is in the axial direction over the external teeth 16 extended outside wall 18 of the inner wheel 7 welded.

In between the collar 14 and the inner wall 18 formed eccentric receiving space 25 are as eccentric the two Teilxzentrizitäten 30 and 32 used. About the spring element 40 these are biased to form a maximum overall eccentricity. In the cross section shown is the drive plate 34 visible, with the drive lug 37 the first part eccentricity 30 interacts.

The ring gear 5 is by means of collar collar 14 on the through bearing journal 42 stored. It will be seen that the journal 42 on the side of the ring gear 4 by means of the retaining ring 46 is secured. Opposite goes the bearing pin 42 in the lid 44 over, with sidewalls pulled down into the inner wall 18 of the inner wheel 7 dips. The cover is in accordance with the trained total eccentricity of the parts eccentric 30 . 32 also formed eccentric. Inside the journal 42 becomes the square 45 for connection to a drive.

Upon actuation of the journal 42 decreases over the parts eccentric 30 . 32 mutually adjusting drive plate 34 the overall eccentricity so that the formed eccentric the inner wheel 7 to a circulation in the ring gear 5 drives. Because the inner wheel 7 over the seat adapter 8th seated tethered, one results with the journal 42 same direction twisting of the backrest adapter 6 or the associated backrest of the vehicle seat.

3 shows in a cross section an outer wheel made by cold extrusion 4 , It becomes the one central hole 50 circumferential collar 14 as well as the raised outer wall 10 can be seen on the inner circumference of the internal teeth 12 is formed. By cold extrusion is the material thickness of the outer wheel 4 in the area 52 to the collar 14 and in the teeth area 53 elevated. The external wheel produced by cold extrusion 4 shows so far a load-appropriate material distribution.

In 4 is a cold-extruded inner wheel 7 shown in a cross section. It will be the raised inner wall 18 recognizable, on its outside a molded external toothing 16 wearing. By a resting ring 54 is the external toothing 16 circumferentially connected to a support geometry. The strength of the inner wheel 7 is thus increased in the same space. By providing the ring 54 In addition, a good flow of material for the formation of external teeth 16 achieved during cold extrusion.

1

Adjuster

2

first fitting part

3

second fitting part

4

outer wheel

5

ring gear

6

backrest adapter

7

inner wheel

8th

seat adapter

9

ground

10

outer wall

12

internal gearing

14

collar

16

external teeth

18

inner wall

20

inner space

23

retaining element

24

retaining ring

25

Eccentric. accommodation space

27

outer ring

28

central opening

30

first eccentric cam parts

32

second eccentric cam parts

34

driver disc

35, 36

lateral recess

37, 38

driving lug

40

spring element

42

pivot

44

cover

45

Square hole

46

retaining ring

48

inner plain bearing bush

49

outer plain bearing bush

50

drilling

52

Area

53

toothed area

54

ring

A

axis of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10021403 C2 [0002, 0004]
• - DE 3130315 C2 [0002, 0006]
• - DE 2834529 C2 [0002, 0007]
• - DE 10105282 B4 [0005]

Claims (14)

Adjustable fitting ( 1 ), in particular for a vehicle seat, with a first fitting part ( 2 ), with a relative to the first fitting part ( 2 ) about a rotational axis (A) rotatable second fitting part ( 3 ), wherein the first fitting part ( 2 ) an outer wheel ( 4 ) with an internal toothing ( 12 ), in which a second fitting part ( 3 ) associated inner wheel ( 7 ) with an external toothing ( 16 ) is used eccentrically to the axis of rotation (A) in the manner of a wobble mechanism, and wherein the inner wheel ( 7 ) to the axis of rotation (A) an eccentric receiving space ( 25 ), with one in the eccentric receiving space ( 25 ) rotatably inserted eccentric ( 30 . 32 ), and with a drive shaft for driving the eccentric ( 30 . 32 ), characterized in that the outer wheel ( 4 ) as a ring gear ( 5 ) with a floor ( 9 ) and with an axial direction via the internal toothing ( 12 ) extended outer wall ( 10 ) is formed, and that in the outer wall ( 10 ) axially against the inner wheel ( 7 ) sliding retaining element ( 23 ) is provided, which on the outer wall ( 10 ) and the inner wheel ( 7 ) against the ground ( 9 ) of the ring gear ( 4 ) stores. Adjustable fitting ( 1 ) according to claim 1, characterized in that the inner wheel ( 7 ) via the external toothing ( 16 ) on the retaining element ( 23 ) is stored. Adjustable fitting ( 1 ) according to claim 1 or 2, characterized in that the inner wheel ( 7 ) in the axial direction over the external toothing ( 16 ) extended inner wall ( 18 ) comprising the retaining element ( 23 ) penetrates in the axial direction, and that the inner wheel ( 7 ) over the inner wall ( 18 ) the second fitting part ( 3 ) assigned. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the outer wall ( 10 ) of the ring gear ( 5 ) and the inner wall ( 18 ) of the inner wheel ( 7 ) are each formed as a cylinder wall. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the retaining element ( 23 ) as a retaining ring ( 24 ) is trained. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that on the ground ( 9 ) of the ring gear ( 5 ) a collar is formed so that the eccentric receiving space ( 25 ) between the collar and the inner wheel ( 7 ) is trained. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the eccentric in the eccentric receiving space ( 25 ) between an inner ( 48 ) and an outer plain bearing bush ( 49 ) is stored. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that in the receiving space ( 25 ) two variable total eccentricity forming, mutually rotatable Teilxzentrizitäten ( 30 . 32 ) are used, which are biased to form a maximum total eccentricity to each other, and that a rotatably connected to the drive shaft driver is provided, which in a drive to the Teilxzentrizitäten ( 30 . 32 ) acts against the biasing direction. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the retaining element ( 23 ) with the outer wall ( 10 ) of the ring gear ( 5 ) and the second fitting part ( 3 ) is welded. Adjustable fitting ( 1 ) according to any one of the preceding claims, characterized in that the drive shaft as a continuous journal ( 42 ) is trained. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the first fitting part ( 2 ), in particular the ring gear ( 5 ), a backrest adapter ( 6 ) and the second fitting part ( 3 ), in particular the inner wheel ( 7 ), a seat adapter ( 8th ), in particular welded. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the external toothing ( 16 ) of the inner wall ( 18 ) of the inner wheel ( 7 ) of a circumferential ring ( 54 ) is covered. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the complete inner wheel ( 7 ) with inner wall ( 18 ) and all external teeth ( 16 ) is produced as a cold extruded part. Adjustable fitting ( 1 ) according to one of the preceding claims, characterized in that the outer wheel ( 4 ) is produced as a cold extruded part.