DE102014207534A1 - VEHICLE SEAT WITH AN ADJUSTING CHINESE - Google Patents

Abstract

The invention relates to a vehicle seat (1) having a setting kinematics (5) and a drive device (20) for driving the adjusting kinematics (5), wherein the adjusting kinematics (5) has a rocker (80) and the drive device (20) has a pinion (25 ) having. The pinion (25) is meshed with a toothed segment (90) formed separately from the rocker (80) and the toothed segment (90) is fixedly connected to the rocker (80).

Description

The invention relates to a vehicle seat, in particular a motor vehicle seat, with a setting kinematics having the features of the preamble of claim 1.

State of the art

Vehicle seats are known from the prior art, which have, in particular for increasing the seating comfort one Einstellkinematik or more Einstellkinematiken. Such a setting kinematics may, for example, constitute a seat height adjuster for adjusting the height of the vehicle seat or a seat cushion inclination adjuster for adjusting a seat surface inclination.

At one of the DE 20 2005 009 185 U1 known motor vehicle seat is the seat height adjustment formed on each side of a seat base in the manner of a four-bar linkage. On both sides of the seat a seat rail forms a base for the joints of each of a front and a rear rocker, which are each pivotally connected to a seat frame side part of the vehicle seat as a coupling.

For both seat height adjusters and other seat adjusters formed by adjustment kinematics, drive mechanisms for driving the adjustment kinematics are known. These are often bidirectional stepping devices whose operating angle is usually 15 ° to 30 °, and which forward only the respective operating direction and are decoupled on the return from the output. Such mechanisms are common as load-bearing systems, especially in height adjusters. Known drive devices are in the DE 103 55 821 B4 . DE 103 40 997 B3 . DE 100 52 089 C1 and DE 100 19 854 C2 disclosed.

A drive device known by use comprises a pinion meshing with a toothing of a rocker of a height adjustment kinematics of the vehicle seat, the drive device being fixed to a structural part of the vehicle seat. The toothing of the rocker is preferably hardened. The rocker is welded to a cross tube of the seat structure.

task

The invention is based on the object to improve a vehicle seat with a Einstellkinematik of the type described above. In particular, a setting kinematics is to be provided with a rocker, which is easily welded to a thin structural component, such as a cross tube. In particular, a setting kinematics is to be provided with a rocker and a kinematically associated with the rocker toothing, in which a heat treatment of the toothing is without influence on the rocker.

solution

This object is achieved by a vehicle seat, in particular a motor vehicle seat, with a Einstellkinematik and a drive device for driving the Einstellkinematik, wherein the Einstellkinematik has a rocker and the drive device has a pinion and the pinion with a toothed segment formed separately from the rocker is in meshing engagement and the sector gear is firmly connected to the rocker.

Characterized in that the pinion is meshed with a separately formed from the rocker tooth segment and the toothed segment is firmly connected to the rocker, parameters such as material, material thickness, alloy and heat treatment of rocker and toothed segment can be chosen differently. Thus, the rocker and the toothed segment with respect to these parameters can remain without mutual influence and each of these two components can be optimized separately with regard to the respective requirements to be met.

A separate design of rocker and gear segment is to be understood that the rocker is made separately from the toothed segment. Only during assembly of the vehicle seat rocker and gear segment are firmly connected. Rocker and toothed segment can be made by means of different tools or in different tool nests of a common tool. A separate embodiment of the rocker and toothed segment is also an initially one-piece design in the tool to understand in which the rocker is separated in a further process step of the toothed segment, rocker and toothed segment then undergo a different treatment (for example, heat treatment) and then joined together again become.

The rocker may be manufactured by means of a cost-effective stamping process, while the toothed segment is a finely cut component. The rocker may be an uncured component while the sector gear is a hardened component. The sector gear can also be a straight or a curved rack.

The rocker, for example, a material thickness of 3 mm and the toothed segment have a material thickness of 5 mm. By doing so leaves the rocker welded with a thin cross tube with a wall thickness of 1.2 mm. A material thickness of 5 mm is a desirable value for the toothed segment. However, a rocker with a material thickness of 5 mm could not be welded with a thin cross tube, for example with a wall thickness of 1.2 mm.

Particularly advantageous, the adjustment kinematics can be a height adjustment kinematics. Vehicle seats known from the prior art can easily be retrofitted according to the invention by replacing a conventional rocker with a rocker and with a gear segment formed separately from the rocker.

The Höheneinstellkinematik is preferably a four-bar linkage consisting of a front rocker, a rear rocker, a base and a seat frame side part of a seat frame. Both the front rocker and, alternatively, the rear rocker may according to the invention be firmly connected to a toothed segment. In a preferred embodiment, the rear rocker is fixedly connected to the sector gear, so that the pinion is in meshing with the rear rocker in kinematic view.

Preferably, the rocker is an L-shaped component having a first rocker arm and a second rocker arm. In this case, the first rocker arm and the second rocker arm can form an acute angle, preferably of approximately 80 °, between them. Such a rocker is preferably combined with a toothed segment which is L-shaped and has a first toothed segment limb and a second toothed limb limb. The rocker and the toothed segment can then form a unit which forms a through hole for a known bridge for fixing the pinion relative to the toothed segment. Particularly preferably, the first toothed segment leg and the second toothed segment leg enclose an angle of approximately 90 ° between them. The first toothed segment limb may have, at least approximately, the same length as the second toothed limb limb.

Preferably, the toothed segment is firmly riveted to the rocker, in particular by means of at least one rivet. The riveting process is independent of the heat treatment of the components. In principle, however, the rocker and the toothed segment can also be connected to one another by any other joining method known per se, for example by means of welding, screwing and / or gluing.

Figures and embodiments of the invention

In the following the invention is explained in more detail with reference to an advantageous embodiment shown in the figures. However, the invention is not limited to this embodiment. Show it:

1 a schematic side view of the vehicle seat,

2 FIG. 2 is a perspective view of a seat base of a vehicle seat known from the prior art. FIG.

3 : A perspective view of a seat base of a vehicle seat according to the invention and

4 : A detailed view of an area of a rear rocker of the vehicle seat 3 ,

In 1 is schematically a vehicle seat 1 which is a seat cushion 12 and a backrest 14 includes. In 2 is a known from the prior art seat base of the vehicle seat 1 shown. The 3 and 4 show a seat base of a vehicle seat according to the invention 1 , The vehicle seat according to the invention 1 corresponds to the difference described below, known from the prior art vehicle seat 1 ,

The vehicle seat 1 is described below using three mutually perpendicular spatial directions. A longitudinal direction x runs in a vehicle seat installed in the vehicle 1 substantially horizontal and preferably parallel to a vehicle longitudinal direction, which corresponds to the usual direction of travel of the vehicle. A transverse direction y extending perpendicular to the longitudinal direction x is likewise horizontally aligned in the vehicle and runs parallel to a vehicle transverse direction. A vertical direction z is perpendicular to the longitudinal direction x and perpendicular to the transverse direction y. In a vehicle seat installed in the vehicle 1 the vertical direction z runs parallel to the vehicle vertical axis.

The position and direction used, such as front, rear, top and bottom refer to a viewing direction of a vehicle seat 1 seated occupants in normal seating position, with the vehicle seat 1 mounted in the vehicle, in a suitable for passenger transport use position with upright backrest 14 and as usual in the direction of travel is aligned. The vehicle seat 1 However, it can also be installed in a different orientation, for example, transversely to the direction of travel.

The vehicle seat 1 for a motor vehicle is having a base 3 , in the present case two pairs of seat rails, fastened to the vehicle floor of the motor vehicle. In a modification of the embodiment is the basis 3 designed as an adapter part.

A height adjustment kinematics 5 of the vehicle seat 1 has on both vehicle seat sides depending on a four-bar arrangement, which from the base 3 , a front swingarm 70 , a rear swingarm 80 and a seat frame side member 100 is formed, which are each interconnected by means of hinges. Such a four-bar arrangement is known per se, for example from the DE 20 2005 009 185 U1 ,

A seat frame 10 includes a seat frame side part on both sides of the vehicle seat 100 , The two seat frame side panels 100 run largely in the longitudinal direction x and are in the rear of the seat frame 10 in the transverse direction y through a cross tube 110 connected with each other. The cross tube 110 is rotatable in the two seat frame side parts 100 stored. The two rear wings 80 are in a respective upper area with the cross tube 110 welded. The cross tube 110 thus forms on both seat outer sides each have a pivot bearing between one of the wings 80 and the associated seat frame side member 110 , One swingarm each 80 and the cross tube 110 form a transmission member of the previously described four-bar arrangement.

The two seat frame side panels 100 are also in the front area of the seat frame 10 through a crossbeam 120 connected with each other. Both the cross tube 110 as well as the crossbeam 120 run largely perpendicular to the extension of the seat frame side parts 100 ,

The seat frame 10 wears the seat cushion 12 and in the present case also the backrest 14 , By means of height adjustment kinematics 5 is the height of the seat cushion 12 - and present at the same time the backrest 14 - the vehicle seat 1 above the vehicle floor and thus above the base 3 adjustable.

For driving and locking the height adjustment kinematics 5 is on at least one seat side, in this case on exactly one seat side, a mechanical drive device only partially shown in the figures 20 provided, which is effective on a vehicle seat side between two gear members of the local four-bar linkage. The drive device 20 has an output shaft 28 and one with the output shaft 28 rotatably connected pinion 25 on. The drive device 20 is by means of several screws on the associated seat frame side part 100 screwed. Such a drive device is for example from the DE 10 2009 014 651 A1 known. In a modification of the embodiment, the pinion 25 Component of an electromotive drive device, as this example, from the DE 197 09 852 A1 is known.

The drive device 20 includes a housing 22 , which largely on the side facing away from the seat center side of the two seat frame side panels 100 is arranged. A present circular portion of the housing, which with the pinion 25 connected output shaft 28 the drive device 20 encloses, also passes through a circular opening of the seat frame side member 100 so the pinion 25 on the seat center side facing the seat frame side part 100 is arranged. Hereinafter, only the seat side is described, on which the drive device 20 located. The opposite seat side corresponds to the drive-specific features of the described seat side.

At the in 2 represented and known from the prior art vehicle seat 1 is the rear swingarm 80 formed approximately triangular and has on one outer side a swing toothing 86 to interact with the pinion 25 the drive device 20 on. The pinion 25 and the swinging teeth 86 are in mesh with each other. A rotation of the pinion 25 causes in a conventional manner pivoting the rear rocker 80 height adjustment kinematics 5 so that the height of the seat frame 10 is changed.

In a first corner area is the rear swingarm 80 by means of a bearing pin 83 rotatable with an adapter of the base 3 connected. In another corner area is the rear swingarm 80 with the in the seat frame side parts 100 rotatably mounted cross tube 110 welded. The rear swingarm 80 also has a hole 85 , in the present case a around the cross tube 110 curved elongated hole 85 on.

A known bridge 50 serves to fix the relative positions of pinion 25 and swinging teeth 86 to each other, especially under high load. A first end of the bridge 50 has a hole that has an end portion of the output shaft 28 absorbs. A second end of the bridge 50 has another hole, the one on the seat frame side part 100 fasten bolts 55 absorbs. The bolt 55 is in one compared to the tooth height of the swing teeth 86 small distance to a pinion 25 facing inner wall of the slot 85 arranged. The bridge 50 avoids that the pinion 25 and the bolt 55 can move away from each other. At the same time the bolt comes 55 after a slight deformation of the components of the vehicle seat 1 under high load in contact with the rear swingarm 80 , So that the swing teeth 86 through the bolt 55 relative to the seat frame side part 100 and to the pinion 25 is held, so that the meshing between the pinion 25 and the swinging teeth 86 preserved.

In the 3 and 4 is the seat base of a vehicle seat according to the invention 1 represented, which corresponds to the prior art described above except for the invention described below essential differences.

In contrast to the prior art described above, the rear rocker is 80 not immediately in mesh with the pinion 25 but one with the rear swingarm 80 firmly connected toothed segment 90 is in mesh with the pinion 25 ,

The rear swingarm 80 is presently an L-shaped sheet metal part, preferably made of sheet steel. The rear swingarm 80 has a first swing leg 81 and a second swing leg 82 which enclose an angle of approximately 80 ° between them.

In an area where the first swinging leg 81 with the second swing leg 82 is connected, is the rear swingarm 80 with the cross tube 110 connected. This is indicated by the rear swingarm 80 in this area a first hole 80.1 on, through which the cross tube 110 passes through. The rear swingarm 80 is in this area with the cross tube 110 welded. In a modification of the embodiment, the rear rocker 80 rotatable on the cross tube 110 be stored. In this case, the cross tube 110 preferably rotationally fixed to the seat frame side parts 100 attached.

The first swinging leg 81 provides the definition of height adjustment kinematics 5 necessary section of the rear swingarm 80 dar. The first swinging leg 81 points to his from the cross tube 110 opposite end a second hole 80.2 for receiving the bearing pin 83 on. Between the first hole 80.1 and the second hole 80.2 has the first swinging leg 81 in the present case also has a third hole, whose function will be described in more detail below.

The second swing leg 82 has a significantly shorter length than the first swing leg 81 , In the present case, the length of the second swing leg is 82 approximately 40% of the length of the first swing leg 81 , The second swing leg 82 points to his from the cross tube 110 remote end to a fourth hole, whose function will be described in more detail below.

The toothed segment 90 is presently an L-shaped sheet metal part, preferably made of sheet steel. The toothed segment 90 has a first toothed segment leg 91 and a second toothed segment leg 92 which enclose between them an angle of approximately 90 °. The first toothed limb 91 has approximately the same length as the second toothed segment limb 92 ,

Each of the two opposite ends of the toothed segment limbs 91 . 92 is fixed with one of the two swinging legs 81 . 82 connected, in this case by means of two rivets 88 riveted. The two opposite ends of the toothed segment limbs 91 . 92 each have a hole as a through hole for the rivet 88 on. The hole in the first toothed segment limb 91 Aligns with the third hole in the first swing leg 81 , The hole in the second toothed segment limb 92 Aligns with the fourth hole in the second swing leg 82 , One rivet each 88 passes through an aligned pair of holes. The two rivets 88 connect the rear swingarm 80 firmly with the toothed segment 90 ,

The second toothed limb 92 has a toothing 95 on. The second toothed limb 92 is curved around the pivot point between the rear swingarm 80 and the seat frame side part 100 So around the cross tube 110 so that too the gearing 95 corresponding, in this case convex, is curved. The gearing 95 is with the teeth of the pinion 25 in meshing. A rotation of the pinion 25 causes pivoting of the rear rocker in the manner described above 80 height adjustment kinematics 5 so that the height of the seat frame 10 is changed.

A known bridge 50 serves to fix the positions of the pinion 25 and the gearing 95 of the tooth segment 90 to each other, especially under high load. A first end of the bridge 50 has a hole that has an end portion of the pinion shaft 28 absorbs. A second end of the bridge 50 has another hole, the one on the seat frame side part 100 fasten bolts 55 absorbs. The bolt runs in the transverse direction y through a between the rear rocker 80 and the toothed segment 90 trained hole 85 , The bolt 55 runs in one compared to a tooth height of the toothing 95 small distance to one of the teeth 95 opposite side of the toothed segment 90 , The bridge 50 avoids that the pinion 25 and the bolt 55 can move away from each other. At the same time under high load after a small deformation of the components of the vehicle seat 1 the toothed segment 90 and thus the rear swingarm 80 through the bolt 55 relative to the seat frame side part 100 and to the pinion 25 kept that way that the meshing between the pinion 25 and the gearing 95 preserved.

Will the drive device 20 driven, this pivots the two associated gear members, in this case the seat frame side part 100 and the rear swingarm 80 , relative to each other, so that about the height adjustment kinematics 5 the height of the seat cushion 12 and the backrest 14 is changed.

The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in combination for the realization of the invention in its various forms.

LIST OF REFERENCE NUMBERS

1

 vehicle seat

3

 Base

5

 Höheneinstellkinematik

10

 seat frame

12

 seat cushions

14

 rest

20

 driving device

22

 casing

25

 pinion

28

 output shaft

50

 bridge

55

 bolt

70

 front swingarm

80

 rear swingarm

80.1

 first hole

80.2

 second hole

81

 first swinging leg

82

 second swing leg

83

 bearing bolt

85

 Hole, slot

86

 swing teeth

88

 rivet

90

 toothed segment

91

 first toothed segment leg

92

 second toothed segment limb

95

 gearing

100

 Structural part, seat frame side part

110

 cross tube

120

 crossbeam

x

 longitudinal direction

y

 transversely

z

 vertical direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202005009185 U1 [0003, 0025]
• DE 10355821 B4 [0004]
• DE 10340997 B3 [0004]
• DE 10052089 C1 [0004]
• DE 10019854 C2 [0004]
• DE 102009014651 A1 [0029]
• DE 19709852 A1 [0029]

Claims (10)

Vehicle seat ( 1 ), in particular motor vehicle seat, with a setting kinematics ( 5 ) and a drive device ( 20 ) for driving the adjustment kinematics ( 5 ), whereby the adjustment kinematics ( 5 ) a rocker ( 80 ) and the drive device ( 20 ) a pinion ( 25 ), characterized in that the pinion ( 25 ) with a separately from the swingarm ( 80 ) formed toothed segment ( 90 ) is in tooth engagement and the toothed segment ( 90 ) firmly with the rocker ( 80 ) connected is. Vehicle seat ( 1 ) according to claim 1, characterized in that the adjustment kinematics a height adjustment kinematics ( 5 ). Vehicle seat ( 1 ) according to claim 2, characterized in that the height adjustment kinematics ( 5 ) a four-bar arrangement consisting of a front rocker ( 70 ), a rear swingarm ( 80 ), a base ( 3 ) and a seat frame side part ( 100 ) of a seat frame ( 10 ), having. Vehicle seat ( 1 ) according to claim 3, characterized in that the pinion ( 25 ) with one on the rear rocker ( 80 ) fixed tooth segment ( 90 ) is in meshing engagement. Vehicle seat ( 1 ) according to one of claims 1 to 4, characterized in that the rocker ( 80 ) an L-shaped component with a first rocker arm ( 81 ) and a second swing leg ( 82 ). Vehicle seat ( 1 ) according to claim 5, characterized in that the first rocker arm ( 81 ) and the second swing leg ( 82 ) enclose between it an acute angle, preferably of approximately 80 °. Vehicle seat ( 1 ) according to one of claims 1 to 6, characterized in that the toothed segment ( 90 ) an L-shaped component with a first toothed segment leg ( 91 ) and a second toothed segment limb ( 92 ). Vehicle seat ( 1 ) according to claim 7, characterized in that the first toothed segment limb ( 91 ) and the second toothed limb ( 92 ) enclose between them an angle of approximately 90 °. Vehicle seat ( 1 ) according to claim 7 or 8, characterized in that the first toothed segment limb ( 91 ), at least approximately, has the same length as the second toothed segment limb ( 92 ). Vehicle seat ( 1 ) according to one of claims 1 to 9, characterized in that the toothed segment ( 90 ) firmly with the rocker ( 8th ) is riveted, in particular by means of at least one rivet ( 88 ).

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