DE7031179U - ARTICULATED FITTING FOR SEATS WITH ADJUSTABLE BACKREST, IN PARTICULAR FOR VEHICLE SEATS. - Google Patents

Description

PATENT LAWYERS DiPL-ING. LUDEWIG graduate phys. BUSE graduate phys. MENTZEL

2/89 password; Bearing shield

Fritz Xeiper, 563 Remsoheid-Hasten,

Büohelstr. 5 ^ -58

Articulated fitting for seats with adjustable backrest, especially for Motor vehicle seats

The invention relates to a hinge fitting for seats with an adjustable backrest, in particular for motor vehicle seats, in which a fixed joint part assigned to the seat and a pivotable joint part assigned to the backrest are connected to one another via a pivot axis, with an adjusting and locking device which determines the position of the two joint parts and in which one joint part has an internal gear rim and a spur gear engaging in this is permanently assigned to the other joint part, the tip circle of the spur gear ■ is at least one tooth height smaller than the root circle of the internal gear rim and one of the two joint parts on one arranged on the pivot axis, rotatable by a handle eccentric is mounted, the eccentricity of about the Difference between the root circle of the inner tooth rim and the Corresponds to the tip circle of the spur gear and this difference is dimensioned in such a way that a self-locking between the internal gear rim and the spur gear is ensured, the inner free space of the internal gear rim with a bridge that is integral with it and has a bearing for the eccentric.

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see 1st. Such a hinge fitting has the advantage that it allows fine adjustment of the backrest in a simple manner, with no additional locking of the respectively set backrest position. In addition, such a Articulated fitting requires only an extremely small amount of space, so that it can be easily integrated into one even in confined spaces, as is the case in particular in motor vehicles Can integrate seat.

The object of the present invention is to design such a hinge fitting also for unfavorable loading conditions, such as this, for example, with an arrangement only on one side of a hinge fitting occur on a seat and can cause premature unilateral wear of the bearing parts. According to the invention, this is essentially achieved by that one of the joint parts mounted with the toothed parts on the pivot axis has a pivot axis that encompasses the toothed part of the other joint part and receives the pivot axis on the side facing away from the associated toothed part End shield is united. Due to the additional arrangement of the end shield on one of the joint parts, all-round Loads on the backrest or the joint part assigned to the backrest are easily absorbed and evenly distributed over the bearing points.

It is recommended that the bearing plate be permanently assigned to the pivoting joint part, in order to immediately compensate for oblique loads on the pivot axis and to avoid any deviation that would otherwise be possible to maintain the intended axial direction. In addition, is

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it is also useful to use the one provided with the end shield To unite the joint part at the same time with the inner ring gear seated on the pivot axis, since this results in an accommodation of the Individual parts of the hinge fitting are possible in the smallest of spaces.

The end shield is expediently fastened with a cranked shoulder directly by fastening elements to the associated joint part and the other joint part held flush so that tilting of the individual parts against each other can be excluded. At the same time, it is advisable to store the end shield with the use of a bearing bush on the swivel axis, which is in a between the end shield and the adjacent toothed part lying area is designed to be widened in relation to the bearing cross-section. Due to the arrangement of the bearing bush, special processing of the bearing plate to create sufficient bearing properties can be dispensed with, so that during its manufacture only the strength-related issues need to be taken into account. By expanding the bearing bush in an area lying between the end shield and the adjacent toothed part, this is at the same time secured against displacement.

For the joint parts to rest evenly against one another, the fixed and the pivotable joint part can additionally use a on the side facing away from the fastening atelle of the end shield Guide element be held together, wherein the guide element can advantageously be designed in a structurally simple manner as a head bolt, the cross-section of which is reduced End in one joint part inseparable and with his

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Head part is to be fastened behind the end area of the other joint part.

In some cases, a braking element can also be arranged between the bearing plate and the pivot axis, whereof the forces introduced in the pivoting direction in the pivotable articulated joint can also be partially absorbed via the bearing plate. The braking element leaves out sioh advantageous • in a disc firmly seated on the pivot axis and an annular brake held on it and resting against the end shield Form lining, wherein the brake lining is preferably made of elastic material and thus enables a compensation of manufacturing tolerances in the Aohsriohtung of the pivot axis.

To limit the pivotability of the backrest when it is reached For the lying position, it is also advisable to assign a support pad to the end shield and a counter pad to the adjacent toothed part, in such a way that the stop and the counter pad are in the rear end position (lying position) of the backrest Come into contact with one another.

In a further embodiment of the joint fitting according to the invention, those between the end shield and the one Toothed part of one joint part mounted other joint part and the toothed part assigned to this separately formed held one inside the other and releasably coupled repeatedly by a locking device. That way you can In addition to the fine adjustment of the backrest, the backrest can also be completely released, in order to ensure this, especially when Installation of the seat in two-door motor vehicles can be quickly transferred into an entry position, whereby the

■ nd locking device according to certain seat position of the backrest swiveling back from the entry position is always achieved again and the backrest does not require any new position adjustment in this context. The locking device is thereby two-way in a manner known per se through a means an over-center spring, which can be held either in the locked position or in the open position and is arranged so that it can pivot on the joint part Locking lever is formed which has a locking lug that can be snapped into a locking void of the associated toothed part. It is not due to the option of holding the locking lever in both the locked and the open position required during the rapid transfer of the backrest into a front entry position or when returning to the preselected sitting position, the locking lever must be constantly operated by hand. This can also result in the transfer of the locking lever the locking into the open position take place independently of the pivoting movement of the backrest, since the locking lever is initially held automatically in the open position.

On the other hand, to bring about an automatic return of the locking lever from the open to the locked position when the Lean back into the adjusted sitting position and Uok has been, the spur gear expediently has a control curve avf, which acts on the locking lever in its open position, the gradient of which is selected so that a forced transfer the locking lever into the locked position when the backrest is pivoted backwards add to the gear part that remains in engagement Reaching the set seat position occurs.

At the same time, in the selected seat position of the backrest, a stop that is in contact with the guide element of the toothed parts in the backward swiveling direction can also occasionally be on the spur gear

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be provided, which is advantageous from the RUokflank of a to- gleloh the control curve for the locking lever forming radial projection part of the associated toothed part is formed.

In the drawing, the invention is shown in several embodiments. examples shown, namely show:

Fig. I a motor vehicle seat with a first

Design form of a joint sole according to the invention in a diagrammatic representation,

Fig. 2 the hinge fitting in view,

Flg. 3 a sonity according to the line III-III of Fig. 2,

FIG. K shows a sonicity along the line IV-IV of FIG. 2,

5 shows a further embodiment of an articulated sole plate according to the invention in perspective,

Flg. 6 shows a sonity according to the line VI-VI of FIGS. 5 and

7 shows a third embodiment of a joint fitting according to the invention in cross section.

1 shows a motor vehicle seat 2o, on the seat part 21 of which a backrest 22 is pivotably attached. The seat part and the backrest 22 is a simple pivot bearing on one side of the seat by a hinge fitting 23 according to the invention and on the opposite side of the seat

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2k , but it should be added that instead of the pivot bearing 2k, a further hinge fitting 23 according to the invention can also be provided.

The hinge fitting 23 consists, like FIGS. 2 and 3, in more detail show, from a pivotable joint part 25 assigned to the backrest 22 and a fixed joint part 26 assigned to the seat part 21. The pivotable joint part 25 and the fixed joint part 26 are shown on the backrest 22 and on the seat part 21 in FIG held in a known manner by fasteners.

In the embodiment shown in the present form, the fixed joint part is assigned a spur gear 27 and the pivotable joint part is assigned an internal ring gear 28, which is associated with Your teeth 29 and 3o are mounted in an interlocking manner on a pivot axis 31 designed as an eccentric bolt end form the adjusting and locking device for the backrest. As shown in FIG. 3 it is clear that only a part of the teeth 29 of the spur gear 27 with the teeth 3o of the is thereby always Internal ring gear 28 in engagement, since the tip circle of the spur gear is kept smaller than that by at least one tooth height Root circle of the internal gear, where sioh is the number of teeth on the internal gear from the number of teeth on the spur gear differs by at least one tooth. The area of engagement of the teeth 29 and 3o of the spur gear 27 and the internal gear rim 28 is determined by the respective rotational position of the pivot axis 31 »its bearing area 32 for the inner ring gear 28 and thus also for the pivotable joint part 25 compared to the bearing area 33 for the spur gear 27 and thus for the fixed joint part 26 are eccentrically offset from one another,

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The eccentricity of the pivot axis 31 is adapted to the difference between the root circle of the internal gear rim and dimensioned the tip circle of the spur gear, in such a way that zwisohen the inner ring gear and the spur gear self-locking is guaranteed, what an adjustment of the pivotable joint part 25 relative to the fixed joint part due to rotation of pivot axis 31) but not due to load one of the joint parts can be brought about. It should be mentioned at this point that both the fixed joint part as auoh the pivotable joint part is formed in one piece with the respectively associated toothed part, the inner The free space of the internal gear rim 28 is also provided with a bridging 3 ** which is integral therewith and which is used for mounting on the pivot axis 31.

As shown in FIG. 3, in the present embodiment, in addition to the toothed part designed as an internal gear rim, the pivotable joint part 25 is also assigned a bearing plate 35, which has an upper cranked end cap. rich 36 on the pivotable joint part 25 »in the present Case duroh riveting, is attached and facing away from the pivotable joint part 25 associated internal gear rim 28 Side of the toothed part of the fixed joint part 26, which is designed here as a spur gear 27, is mounted on the pivot axis 31, wherein the Lagerbereioh 32 for the internal ring gear 28 and the Lagerbe rich 37 of the pivot axis are placed concentrically to one another are, while the bearing area 33 for the spur gear 27 and thus for the fixed joint part 26 is offset eccentrically on the other hand.

The cranked end region 36 of the bearing shell 35 is of this type

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chosen that the latter rests in Axialriohtung after the attachment to the adjacent fixed joint part 26 and the fixed Joint part daduroh between de * sohwenkbaren articulated 25 itself and the bearing plate 35 is positioned relative to the pivot axis 31 · It remains to be stated that the bearing plate 35 in the present exemplary embodiment by means of a bearing gerbüohse 38 is mounted on the bearing area 37 of the pivot axis 3i, so that a special processing of the bearing opening of the Bearing shield 35 is omitted and the bearing shield in its entirety can also be relatively thin-walled and can only be designed in accordance with the strength requirements.

Thus, even when unfavorable transverse forces occur, the joint parts or gears are always held together closely on all sides is ensured, the one joint part, in the present case the fixed joint part 26, is also assigned a guide element 39. The guide element 39 is designed like a rivet, with its tapered end region in the fixed Joint part 26 is attached, while the enlarged head region 4o engages behind the free end of the pivotable joint part 25 and therefore always in contact with the fixed joint part, in such a way that the two joint parts spread apart in this area is not possible from each other, on the other hand a pivoting movement of both parts against each other is permitted.

Duron rotation of the pivot axis 31 by means of one of the overview The handle 41 shown only in FIG. 1 takes place as a result of the eccentric displacement of the bearing areas 32 and 37 a continuous change in the position of the toothed parts 27 compared to the bearing area 33 for the fixed joint part 26 and 28, so that due to the difference between the root circle of the internal gear rim 28 and the tip circle of the spur gear 27

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successively different serrations in engagement come. Due to the differences in the number of teeth on both toothed parts, they also become theirs Rotation against each other about the pivot axis 31 is effected. Since the If a toothed part 27 does not experience an absolute change in position in connection with the fixed joint part 26, a pivoting of the other toothed part 28 occurs together with the pivotable joint part 25 and thus the backrest 22 a.

5 and 6 show a further embodiment of an articulated sole plate 45, which differs from that described above Embodiment daduroh differs that here the fixed The joint part 26 'and the associated toothing part, in the present case the spur gear 27', are designed separately from one another, but are rotatably mounted in one another. The storage of these two parts takes place by means of projecting regions, with the joint part around the Sohwenkaohse 31 * around an axial protrusion 46 is formed, while the spur gear 27 * has an adapted circumferential cranking 47 and thus on the Pushing out 46 of the fixed joint part 26 'is mounted. It is to be added at this point that for all sioh opposite The previous embodiment basically does not change Parts of which the same reference numerals have been retained for the sake of overlooks.

Due to the rotatable connection of the fixed joint part 26 * with the associated toothing part 27 * is a pivoting of the pivotable in the embodiment according to FIGS

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Joint part 25 and thus the backrest 22 opposite the seat part 21 or the fixed joint part 26 * auoh with the elimination of the by the interlocking toothed parts in connection with their storage on eccentrically offset Bereiohen the Swivel axis formed adjusting and locking device also possible. Such a quick adjustment of the backrest 22 is included always advantageous when the backrest is to be folded forward, especially when using the hinge fitting for seats in two-door motor vehicles, in order to gain access to the To enable interior part of the motor vehicle.

For the non-rotatable connection of the fixed joint part 26 'with the associated toothed part 27', a locking device is provided which essentially consists of a locking lever 48 which is pivotably arranged on the fixed joint part 26 * and which, with a locking lug 49, forms a radial projection 5o of the toothed part 27 * in engages behind the locking position and thereby prevents the rotation of the toothed part 27 * relative to the fixed joint part 26 ¹ '. By pivoting the locking lever 48 by means of a handle 51, the locking lug 49 can be transferred from the locking position shown in FIG. 5 to an open position, ie lifted from the projection 5o ees toothed part 27 *, after which the pivoting joint part 25 can be freely pivoted with the backrest 22 and together with the two meshing toothing parts 27 * and 28 and the end shield 35 can be freely pivoted into the entry position. By loading the locking lever 48 by means of a spring 52 held in over dead center, the locking lever 48 is automatically held in the open position after the dead center of the spring 52 has been exceeded.

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So that when the backrest is freely pivoted between the seat position and the entry position, it is not necessary to manually actuate the locking lever 48 after it has been returned to the seat position of the backrest preselected with the fine adjustment device, the toothed part 27 'is also one of a further projection 53 formed control curve 5h , which cooperates with a guide part 53 of the locking lever k8 and has a solohe slope that the locking lever k8 is pivoted shortly before reaching the set seat position over the dead center and duroh the spring is loaded in the sense of the locking position, so that near reaching the preselected seat position the locking lug k9 of the locking lever h8 again engages behind the radial projection 5o of the toothed part 27 '. To further secure the seat position preselected for the fine adjustment device, the projection 53 of the toothed part 27 ¹ carrying the cam 5 ^ is also designed and arranged in such a way that, when the seat position is reached, it rests against the guide element 39, which is attached to the fixed joint part 26 * and the pivotable joint part rests.

It should also be mentioned that in the present embodiment in a manner similar to the embodiment described above between the pivot axis 31 * and the bearing plate 35 of the pivotable joint part 25, a braking element 56 is provided, which is firmly seated from one of the pivot axis 31 ' Soheibe 57 and a fixedly arranged thereon, preferably consisting of elastic material, the end shield 35 in the axial direction device applied brake lining 58 is made. Furthermore, it should be mentioned that both the toothed part 27 'assigned to the fixed joint part 26' and the bearing plate 35 in the present case Case stops 59,6o are formed in such a way that these Ansohlöge when reaching a rear limit position (lying position) of the backrest

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Put them together and thereby relieve the toothed parts of the fine adjustment device.

Finally, FIG. 7 shows a section through a further embodiment which differs from the embodiment shown in FIGS. 5 and 6 only in that in this case the fixed joint part 26 'is assigned the internal gear rim 28 *, the connection between the internal gear rim and the fixed hinge part in the present case is done in the same way as in the previous embodiment between the fixed hinge part and the spur gear, so that here too a free pivotability of the backrest with the elimination of the Fine adjustment device is possible.

As already mentioned, the embodiments shown are only exemplary implementations of the invention and it is not limited to; rather, various changes and other designs are still possible.

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Claims (1)

PATENTANWÄLTE Dipl .-? Hys. Mentzel DIPL-ING. LUDEWIG DIPL-PHYS. BUSE - 56 WUPPERTAL-BARMEN Password: "bearing shield" Expectations: 1. Articulated fitting for seats with adjustable backrest, in particular for motor vehicle seats, in which a fixed joint part assigned to the seat and a pivotable joint part assigned to the backrest are connected to one another via a pivot axis, a locking and locking device being provided which determines the position of the two joint parts with respect to one another wherein the is a permanently assigned to these engaging spur a hinge part is a internal ring gear and the other joint part, wherein the head circle of the spur wheel of at least one tooth height is less disposed than the root circle of Innenzahnlcranzes and one of the two hinge parts one on the pivot axis, by a handle rotatable eccentric is mounted, the eccentricity of which corresponds approximately to the difference between the root circle of the internal gear rim and the tip circle of the spur gear and this difference is dimensioned such that self-locking between the internal gear rim and the spur gear is ensured, with the inner free space of the internal gear rim is provided with a bridging which is integral with it and has a bearing for the eccentric, characterized in that one of the joint parts (25, 26, 26 ') with a toothed part 703117910.12.70 (27, 27 ", 28") of the other joint part (26, 26 ") encompassing and receiving the pivot axis (31, 31 ') on the side facing away from the associated toothing part Bearing shield (35) is united. 2. Joint fitting according to claim 1, characterized in that the bearing plate (35) is the pivotable joint part (25) is permanently assigned. 3. Hinge fitting according to claim 1 or 2, characterized in that that the joint part (25) provided with the bearing plate (35) with the one at the same time as the pivot axis (31, 31 ') seated internal ring gear (28) is combined. 4. Hinge fitting according to one or more of the claims 1-3 »characterized in that the bearing plate (35) has a cranked shoulder (36) directly at one end attached to the associated joint part (25) by fastening elements and the other joint part (26, 26 ') is held flat. 5. Hinge fitting according to one or more of the claims 1 - k _t ^{characterized in that the bearing plate (35) is mounted on the pivot axis (31, 31 1} ) with the inclusion of a bearing bushing (38), the cross-section of which is widened from the bearing area in an area between the bearing plate and the adjacent toothed part . 6. Hinge fitting according to one or more of the preceding claims, characterized in that the 703117910.1Z70 fixed and the pivotable joint part are held together on the side facing away from the fastening point of the bearing plate (35) via a guide element (39) . 7. Hinge fitting according to claim 5 »characterized in that the guide element (39) is designed as a head bolt , the end of which is smaller in cross-section in the one joint part (26, 26) and is undetachable with its head part (^ O) engaging behind the end area of the other joint part is attached. 8. Articulated fitting according to claim 1, characterized by the arrangement of a braking element (56) between the pivot axis (31 *) and the bearing plate (35). 9. Hinge fitting according to claim 8, characterized in that the braking element (56) is formed from one of the pivot axis (31 *) firmly seated disc (57) and an annular brake lining (58) held thereon and resting against the end shield (35). 10. Hinge fitting according to claim 9, characterized in that the brake lining (58) consists of elastic material. 11. Hinge fitting according to one or more of the preceding claims, characterized in that the end shield (35) has a stop (60) and the adjacent toothed part (27 ¹ ) is assigned a counter-stop (59), such that the stop and counter-stop in a rear end position (reclining position) of the backrest in plant ane inanderkommen. 703117910.1170 ^{12. Articulated fitting according to claim 1, characterized in that the other joint part (26 1} ) mounted between the bearing plate (35) and the toothing part of the associated hinge part (25) and the toothing part (27 ^f , 28 ^f ) associated therewith are kept separate from one another and can be repeatedly releasably coupled by a locking device. 13. Hinge fitting according to claim 12, characterized in that that the locking device in a known manner by means of an over-center spring (52) Can be held either in the locked or in the open position and pivoted on the fixed joint part (26 ·) arranged locking lever (48) is formed, the one in a locking projection (50) of the associated toothing part (27 ', 28') has a locking lug (49) which can be locked in place. 14. Articulated fitting according to claim 13, characterized in that the toothed part (27 ¹ , 28 ') has a control cam (54) which acts on the locking lever (48) in its open position and whose slope is selected so that a forced transfer of the locking lever ( 48) enters the locked position when the backrest (22) is pivoted back together with the toothed parts that have remained in engagement before the set seat position is reached. 15. Hinge fitting according to claim 6 and 13, characterized in that on the toothing part (27 ¹ ) in the selected seat position of the backrest (22) the guide element (39) of both toothing parts abutting stop (53) is formed. 16. Hinge fitting according to claim 15, characterized in that that the attack from the back flank of one at the same time 703117910.1Z70 Forming the control cam (54) for the locking lever (^ 8) radial projection (53) of the associated toothing part (27 *) is formed. 703117910.1170