DE102008028105B4 - Adjuster - Google Patents

Abstract

Electrochemically painted adjustment fitting (1), in particular for a vehicle seat, with a first fitting part (2) and with a second fitting part (3) that can be rotated relative to the first fitting part (2) about an axis of rotation (A), one component of the adjustment fitting (1) is made of an electrically insulating material and this component is provided with a label and is paint-free.

Description

The invention relates to an adjustment fitting, in particular for a vehicle seat, with a first fitting part and with a relative to the first fitting part about a rotational axis rotatable second fitting part. It further relates to a method for producing such a Verstellbeschlags.

An adjustment fitting of the type mentioned is usually used in particular for adjusting the backrest of a vehicle seat. For this purpose, for example, the first fitting part with the backrest and the second fitting part is connected to the seat surface of the vehicle seat. The use of a wobble mechanism has been proven at this point, since it is a relatively short-lived with a comparatively few elements, at the same time a gearbox comprehensive rotary joint.

Such adjustment fitting is for example from the DE 29 21 588 A1 known. The wobble gear comprises a rotatable about the rotation axis outer wheel with internal teeth and an eccentric to the central axis in the interior of the outer wheel arranged inner wheel with external teeth. In this case, the outer wheel and the inner wheel to each other form an eccentric receiving space in which a first and a second parts eccentric are arranged rotatable against each other, whereby a variable eccentricity is formed. To actuate the wobble mechanism is provided as a transmission element rotatable by means of an adjusting drive plate. The drive plate has recesses which engage with drive pins arranged on the part eccentrics. Next, a mechanically acting coupling element (for example, a spring) is provided, which rotates the parts eccentric against each other in the resting state of the adjustable fitting that increases their overall eccentricity. As a result, the planetary gear is brought into a position in which it engages without play in the outer wheel. When the drive plate is rotated, a part eccentric is rotated via the drive pin, which reduces the overall eccentricity. As a result, the inner wheel is brought into a position in which it engages with play in the outer wheel. The inner wheel can be rotated tumbling with circumferential eccentricity on the drive plate relative to the outer wheel. As a result, with a corresponding ratio, which is determined by the ratio of the number of teeth of the external toothing of the inner wheel to the number of teeth of the internal toothing of the outer wheel, the first fitting part rotates relative to the second fitting part.

Adjustment fittings, in particular for vehicle seats, are frequently painted by means of cathodic dip painting (KTL) in mass production. The KTL is an electrochemical process in which the workpiece is coated in a dip bath. It is particularly suitable for painting complex structures and large numbers. The paint is immersed in an electrically conductive, aqueous dip and applied between Lackiergut and a counter electrode, a DC voltage. In this case, a water-soluble binder is precipitated on the surface of the paint material connected as a cathode, thus producing a closed, adhering paint film.

Adjustment fittings for vehicle seats are usually D-parts (safety parts), d. H. parts subject to mandatory documentation, as they are particularly safety-relevant. Each D-part must be individually marked and its production and transport must be fully documented.

Disadvantageously, however, the adjustment fittings can not be labeled directly, since a direct inscription would be overpainted by the subsequent coating in the KTL process and thus would be illegible. However, a separate documentation means a relatively high technical effort in the entire manufacturing process of the adjustment fitting.

The object of the invention is therefore to provide a Verstellbeschlag the above-mentioned type, which is produced under consideration of the documentation requirement with relatively little technical effort. The object of the invention is furthermore to specify a simplified method suitable for producing such an adjustment fitting.

With respect to the adjusting fitting, this object is achieved according to the invention by a component of the adjustment fitting is made of a non-electrically conductive material and wherein this component is provided with a label.

The invention is based on the consideration that a technically particularly simple manufacturing process would be possible if the adjustment fitting could be labeled directly at the beginning of the manufacturing process in order to meet the documentation requirement of this safety-relevant component. However, such labeling would be overridden by the paint finish at the end of the manufacturing process in the KTL process. The basis of the KTL method, however, is the formation of a DC voltage field between the component and a counter electrode for applying the paint. This means that the component itself must be connected as an electrode. However, this means in particular that only a painting of components of an electrically conductive Material takes place. In order to enable a marking of the adjustment fitting directly, a component of the adjustment fitting should be made of a non-electrically conductive material, so that this component is not painted during the KTL process. The tag can then be applied to this component directly at the beginning of the manufacturing process.

In an advantageous embodiment, the component is made of a plastic. Plastics consist of synthetic or semi-synthetic polymers with organic groups, are not electrically conductive and can be in their technical properties such as moldability, hardness, elasticity, breaking strength, temperature, heat resistance and chemical resistance by the selection of starting material, manufacturing process and admixture of additives in wide limits vary. These favorable properties make them particularly suitable for components in adjustable fittings and can be easily adapted to the specific requirements.

To further simplify the manufacturing process, no unnecessary additional components should be used for the adjustment fitting, but any parts needed anyway could be made of a non-electrically conductive material and then provided with a label. Therefore, the component, which is made of a non-electrically conductive material, advantageously a cap. Such covers come in Verstellbeschlägen anyway used to achieve, for example, a seal of the wobble mechanism in the adjustable fitting against foreign bodies or when painting. They can also be provided as a transmission element for the force applied by a motor to drive the wobble mechanism.

With respect to the method, the object is achieved according to the invention by a component of the adjustment fitting is made of a non-electrically conductive material and wherein this component provided with a label and then the adjustment fitting in an electrochemical process, in particular in the KTL process, is painted.

In an advantageous embodiment of the method, the marking is applied to the component by means of a laser. Laser inscriptions are water and smudge resistant and very durable. They can also be automated quickly and produced individually, which is why they are particularly suitable to provide in large-scale production components with an individual marking.

The advantages associated with the invention are, in particular, that a technically particularly simple and faster manufacturing process is made possible by the manufacture of a component of the adjustment of a non-electrically conductive material and the provision of this component with a label, while all the requirements for the documentation of this safety-relevant component can be met. The fact that a direct labeling of the component is possible, the quality assurance of the entire manufacturing process is significantly improved and it can be saved in the production process by the simplified production costs.

An embodiment of the invention will be explained in more detail with reference to a drawing. Show:

1 in an exploded view of 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, and

2 the adjustment fitting according to 1 in mounted on a vehicle seat frame state.

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 unwinding 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 eccentric 32 used. 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 as a cap covers. 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 shown in the assembled state. Visible is the backrest adapter 6 , which with the backrest 50 a vehicle seat is connected, and the seat adapter 8th , which with the seat 52 the vehicle seat is connected. From the wobble gear is only acting as a cap lid 44 with the square opening 45 visible, noticeable. On the edge of the lid is a sealing element 54 placed, which comparatively better protects against the ingress of foreign bodies or the penetration of paint during painting.

The adjustment fitting 1 represents a so-called D-component, ie a safety-relevant component requiring documentation, which is why each individual adjustment fitting must be individually marked and its entire manufacturing process must be documented. This is the adjustment fitting 1 provided with a component made of an electrically non-conductive material on which, for example by means of laser inscription the corresponding individual marking is attached. This component is in the illustrated embodiment, the lid 44 ,

By attaching the marking on the lid 44 on the one hand the adjustment fitting 1 be labeled directly during production, which means a significantly simplified manufacturing process, on the other hand, this label can not be overwritten during the subsequent cathodic dip painting, since the lid made of plastic 44 is not electrically conductive and thus does not act as a cathode in the cathodic dip coating. Thus, on the lid 44 no varnish removed during painting and the applied marking is not painted over. This refinement results in an overall considerably simplified production process and simple documentation and identification of the adjustment fitting 1 allows.

LIST OF REFERENCE NUMBERS

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 part eccentric

32

second part eccentric

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

rest

52

seat

54

sealing element

A

axis of rotation

Claims (7)

Electrochemically painted adjustable fitting ( 1 ), in particular for a vehicle seat, with a first fitting part ( 2 ) and with a relative to the first fitting part ( 2 ) about a rotational axis (A) rotatable second fitting part ( 3 ), wherein a component of the adjustment ( 1 ) Is made of an electrically insulating material and wherein this component is provided with a label and is free of paint. Adjustable fitting ( 1 ) according to claim 1, wherein the component is made of a plastic. Adjustable fitting ( 1 ) according to claim 1 or 2, wherein the component is a cap ( 44 ). Method for producing an adjustable fitting ( 1 ), in particular for a vehicle seat, with a first fitting part ( 2 ) and with a relative to the first fitting part ( 2 ) about a rotational axis (A) rotatable second fitting part ( 3 ), wherein a selected component of the adjustment ( 1 ) is made of an electrically insulating material and wherein this component is provided with a label and then the adjustment fitting is painted in an electrochemical process. The method of claim 4, wherein the component is made of a plastic. Method according to Claim 4 or 5, in which the component consists of a cover cap ( 44 ) is manufactured. Method according to one of Claims 4 to 6, in which the marking is applied to the component by means of a laser.

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