WO2005118332A2

WO2005118332A2 - Seat back center bearing

Info

Publication number: WO2005118332A2
Application number: PCT/EP2005/052450
Authority: WO
Inventors: Piotr Szablewski; Bernd Engels; Helmut Mildt
Original assignee: Johnson Controls Gmbh
Priority date: 2004-06-04
Filing date: 2005-05-30
Publication date: 2005-12-15
Also published as: DE102004027550A1; DE102004027550B4; WO2005118332A3

Abstract

The invention relates to a center bearing (1) for two segments (2, 3) of a divided seat back (4) in a vehicle, which may be independently folded and on each of which a bearing (4, 6) is mounted. A one-piece pin (5) is placed inside said bearings, this pin additionally being connected to the vehicle. The pin is rotationally mounted at least on one bearing (4, 6) and/or a bearing (4, 6) is rotationally mounted on one of the segments (2, 3), and a bearing (4) and/or the pin (5) are/is designed so that the pin (5) and/or the bearing (3) deform(s) in the event of an accident.

Description

Leenmlttagerager

The present invention relates to a central bearing for two segments of a split backrest of a vehicle, which can be folded independently of one another. Furthermore, the present invention relates to a bench, preferably a rear seat of a vehicle, which has two segments which are connected to one another by the central bearing according to the invention.

Backrests of vehicles, especially on the back seat, are now often divided into segments that can be folded independently of one another, so that the bench can be used partly as a seat and partly as a storage area. In order to safely separate the passenger cell from the trunk in the event of an accident, the segments of the backrest should remain securely connected to one another by a central bearing. The bearing must also be axial, i.e. H. absorb forces occurring in or against the direction of travel, which hardly occur during normal use of the seat. There has been no shortage of attempts to propose central bearings, the above. Have properties. For example, a backrest center bearing is known from the patent DE 199 26 093, in which a first tube, which is attached to the one backrest segment, and a second tube, which is attached to the other backrest segment, have mutually pluggable regions which can be clamped together in a self-locking manner and block a jerky pulling apart of the two pipes. However, the assembly of this bearing is extremely complex. Furthermore, the central bearing cannot be closed, so that installation space is devoured. It was therefore the object of the present invention to provide a center bearing for two segments of a split backrest of a vehicle, which the above-mentioned. Do not have disadvantages. The object is achieved with a central bearing according to claim 1. Preferred embodiments of the central bearing are claimed in subclaims 2 to 9.

It was extremely surprising for the person skilled in the art and it was not to be expected that the central bearing according to the invention can be produced and assembled simply and inexpensively. With the central bearing according to the invention, the bearing with which the central bearing is fastened to the body and the inner structure can be made lighter become. In addition, the shell can be made closed in the central warehouse, which represents a space and cost advantage.

According to the invention, the center bearing has a one-piece bolt which has a first and a second end, one end being mounted in one segment and the other end in the other segment. The bolt is preferably rotatably supported at one end on one bearing and has a thread at the other end. This thread preferably interacts with a nut which is mounted in the other segment. In the event of an accident, the helix of the thread preferably wedges with the thread of the nut.

The thread is preferably a particularly preferably steep trapezoidal thread which interacts with a corresponding thread in the nut.

In another preferred embodiment of the bearing according to the invention, the bolt is mounted in an intermediate storage, which in turn is mounted in a bush which is fixedly arranged on one of the segments of the backrest. The central bearing preferably has means which ensure that the intermediate bush is arranged axially immovably on the bush.

A means, particularly preferably a nut, is preferably arranged on the bolt and, in the event of an accident, expands the intermediate bushing in such a way that there is a force fit between the intermediate bushing and the bushing.

For this purpose, the bolt is axially displaceable in the intermediate bush at least before the accident.

Another object of the present invention is a bench of a vehicle, preferably a rear bench, with a backrest which has two segments which are connected to one another by a central bearing described above. The segments are preferably not of the same size. Preferably, one segment takes up 20% to 49% and the other segment 80% to 51% of the area of the backrest. One segment very particularly preferably has 40% and the other segment 60% of the area of the backrest.

The bearing, which deforms on impact, is preferably arranged in the larger segment.

The invention is explained below with reference to FIGS. 1 to 10. These explanations are only examples and do not limit the general inventive concept.

FIG. 1 shows a backrest,

FIG. 2 shows an embodiment of the central bearing according to the invention,

FIG. 3 shows the rotatable part and the bolt of the central bearing according to FIG. 2,

FIG. 4 shows the nut of the bearing according to FIG. 2,

FIG. 5 shows a further embodiment of the center bearing according to the invention,

FIG. 6 shows the intermediate sleeve and the bolt of the central bearing according to FIG. 5,

FIG. 7 shows the bolt and the nut of the central bearing according to FIG. 5,

FIG. 8 shows the assembly of the intermediate sleeve on the bolt,

Figure 9 shows the view of Figure 8 with an additional spring and Figure 10 shows the complete center bearing according to the invention in a 3D view.

Figure 1 shows a backrest of a vehicle, which is divided into two segments 2, 3. The segments can be brought into a use or storage position independently of each other. The segments are connected by a common central bearing.

Figure 2 shows an embodiment of the central bearing according to the invention. The central bearing has two bearings 4, 6, the bearing 4 being arranged in one segment, preferably in the smaller segment, and the bearing 6 in the other, preferably the larger, segment. In the present case, the bearing 4 is rotatably arranged on the backrest segment, while the bearing 6 is welded to the segment. The bearing 6 has an internal thread and is therefore designed like a nut. The two bearings are connected to one another by a bolt 5, which has a thread in the part which is in the bearing part 6 and which cooperates with the thread of the nut 9. The thread is a steep trapezoidal thread. The bolt has only a slight play in the nut 6, in the other end, which is mounted in the bearing part 4, it has a greater axial play. In the event of a crash, the bearing pin is deformed and / or bent with the thread, so that it can no longer twist and thus there is an axial locking between the two segments of the backrest.

In Figure 3, the bolt with the bearing 4 is shown. The helix 10 of the steep trapezoidal thread is particularly clearly visible in this illustration. The person skilled in the art recognizes that the thread can also have a different shape. The steep flanks have the advantage that the bolt 5 can be inserted into the nut 6 with a very slight rotation.

In Figure 4, the nut 9 is shown. In this view, the internal thread complementary to the thread 8 of the bolt is visible. FIG. 5 shows a further embodiment of the central bearing according to the invention. The bolt 5 is screwed to a segment of the backrest at its left end. In the area of its other end, the bolt 5 is mounted in an intermediate bush 11, which in turn is mounted axially immovably in a bush 12 which is welded to the segment 6. The axial displacement of the bolt in the sleeve is limited, on the one hand, by the spring means 16 and, on the other hand, by the nut 14, which is screwed onto the bolt. To the left, the axial movement of the intermediate bush 11 in the bush 12 is limited by a spring element 13. The bolt is moved to the left by the axial forces that occur in an accident. As a result, the nut 14 is pulled onto the intermediate sleeve 14 and expands it considerably so that a positive and non-positive connection is established between the bushing 12 and the intermediate bushing 11, so that the two segments of the seat are firmly locked together. The deformation of the intermediate bush dissipates the energy generated in the event of an impact, so that ultimately the forces occurring on the segments are lower.

In Figure 6, the intermediate bush 11 is shown in the lower region. This has spring elements 16, which cooperate with a recess 19 in the bolt 5 and thus prevent displacement of the bolt, at least to the left. Furthermore, the intermediate sleeve 11 has in its right area, which cooperates with the screw 14, recesses 18, which facilitate a spreading apart of the intermediate sleeve upon impact by the screw 14. In the upper part of FIG. 6, the bolt is fastened to a screw at its right end and the intermediate sleeve is shown. It can be seen that the intermediate sleeve and the nut 14 are each chamfered, so that the nut 14 can slide more easily under the intermediate sleeve and expand it.

Figure 7 shows the bolt and nut 14 located at its right end. Furthermore, the recess 19 can be seen, which forms a connection with the spring element.

FIG. 8 again shows the bolt 5 together with the intermediate bush 11 and screw 14. Furthermore, a bearing 22 and a bearing 15, which cooperates with a backrest segment, are arranged on the bolt. FIG. 9 essentially corresponds to FIG. 8, with a spring 13 additionally being arranged which cooperates between the bushing 12 and the intermediate sleeve 11 in such a way that the intermediate sleeve is arranged on the bushing axially immovable to the right.

FIG. 10 shows a further illustration of the intermediate store according to the invention. It can be seen that the right part of the intermediate storage is arranged in a tab and that an attachment has been screwed onto the left part, which is arranged axially immovably on the left segment.

Bezugszelcrienllste

1 central bearing

2, 3 segment

4, 6 bearings

5 bolts

7 one end

8 threads

9 mother

10 coils

11 intermediate socket

12 socket

13 spring

14 screw

15 bearings

16 locking means

17 Bushing on the vehicle body

18 recesses

19 indentation

20 tab

21 bearings

22 bearing of the pin

Claims

claims:

1. central bearing (1) for two segments (2, 3) of a divided backrest (4) of a vehicle, which can be folded independently of one another and on each of which a bearing (4, 6) is attached, in which a one-piece bolt (5) is mounted, which is additionally connected to the vehicle, the bolt being rotatably mounted on at least one bearing (4, 6) and / or a bearing (4, 6) being rotatably mounted on one of the segments (2, 3) and a bearing ( 4) and / or the bolt (5) is designed such that the bolt (5) and / or the bearing (3) deform in the event of an accident.

2. Center bearing according to claim 1, characterized in that the bolt is rotatably mounted at one end (7) on the bearing (4) and has a thread (8) at its other end and that the bearing (6) as a nut ( 9) is designed, which interacts with the thread.

3. center bearing according to claim 2, characterized in that in an accident the helix (10) of the thread (8) wedges with the thread of the nut.

4. Central bearing according to one of claims 2 or 3, characterized in that the thread (8) is a preferably steep trapezoidal thread.

5. Central bearing according to claim 1, characterized in that the bolt is mounted in an intermediate bush (11) which is mounted in a bush (12) which is fixedly arranged on one of the segments (2, 3).

6. Central bearing according to claim 5, characterized in that the intermediate bush (11) with the means (13) is arranged axially immovably on the bush (12).

7. central bearing according to one of claims 5 or 6, characterized in that a means (14) is arranged on the bolt that in an accident the intermediate bushing expands such that a frictional connection between the intermediate bushing (1 1) and the bushing (12th ) he follows.

8. central bearing according to claim 7, characterized in that the means (14) is a nut.

9. central bearing according to one of the preceding claims, characterized in that the bolt (5) is axially displaceably mounted in the intermediate sleeve.

10. Bank of a vehicle with a backrest comprising two segments which are connected to one another by a central position according to one of the preceding claims.

11. Bank according to claim 10, characterized in that the segments are not the same size.

12. Bank according to claim 11, characterized in that the bearing (6) is arranged in the larger segment.