Vehicle seat
Through the combination of five-bar motion system and actuation drive, the problem of inconsistent changes in the seat surface and backrest angles of the seats of the autonomous driving motor vehicle are solved, and a greater tilt angle and height adjustment is achieved, improving the comfort of the occupants Sex and safety.
Patent Information
- Application Number
- CN202380036753.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-04
- Filing Date
- 2023-05-11
- Publication Date
- 2024-12-13
AI Technical Summary
When the seats of existing autonomous driving motor vehicles are in a tilted position, the tilt angle changes of the seat surface and the backrest are not coordinated, and there is a lack of effective height adjustment and tilt adjustment functions, which affects the comfort and safety of the occupants.
Using a five-bar motion system, combining the first actuation driver and the second actuation driver, the height adjustment and tilt position change of the seat frame and backrest are achieved through the motor, the gear mechanism and the spindle nut, and the second actuation driver eliminates self-locking. The rotating regulator is positioned higher in the third rotation axis to increase the tilt angle change, reduce structural space occupation, and adjust the seat surface decoration carrier through the third actuation driver to keep the backrest angle unchanged.
A greater tilt angle change in the seat surface and backrest is achieved, improving seat comfort and safety, especially in the comfortable posture of the occupant during autonomous driving operations, and reducing the risk of leg injury in the event of collision.
Smart Images
Figure CN119137012A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a vehicle seat, in particular a vehicle seat for automatically driving a motor vehicle, the vehicle seat having a seat substructure and a backrest hinged to the seat substructure, the seat substructure having a base, a seat frame and an adjustment movement system, which acts between the base and the seat frame for performing a height adjustment function and for moving the seat frame and the backrest into an inclined position, wherein the adjustment movement system is in the form of a five-bar movement system with a first front link, a second front link and a rear link, wherein the first front link is pivotally hinged to the base about a first rotation axis, the second front link is pivotally hinged to the base about a second rotation axis, and the rear link is pivotally hinged to the base about a second rotation axis. The rotation axis is pivotally articulated to a first front link, the second front link is pivotally articulated to a seat frame about a third rotation axis, the rear link is pivotally articulated to the seat frame about a fourth rotation axis, and the rear link is pivotally articulated to a base about a fifth rotation axis, wherein the vehicle seat has a first actuating drive for performing a height adjustment function and has a second actuating drive for moving the seat frame and the backrest into a tilted position, wherein, in order to move the seat frame and the backrest into the tilted position by the second actuating drive, the angle between the second front link and the seat frame is variable. Background Art
[0002] DE 10 2018 122 198 A1 discloses an actuating drive for a motor vehicle, in particular for a motor vehicle seat, having an electric motor with an output shaft; a gear mechanism having a spindle nut and a gear mechanism housing and connected to the output shaft; it has a spindle engaged with the spindle nut and has a retaining member at least partially surrounding the gear mechanism housing.
[0003] WO 2020 / 207835 A1 discloses a vehicle seat with a height adjustment motion system, which has a four-rod device and an adjustment arm at each of two seat sides arranged offset from each other in a lateral direction, each of the two four-rod devices has a base, a side, a front link and a rear link, which serve as a gear mechanism component of the four-rod device, wherein a first rotating hinge structure pivotally connects the base to the rear link, a second rotating hinge structure pivotally connects the rear link to the side, a third rotating hinge structure pivotally connects the side to the front link, and a fourth rotating hinge structure pivotally connects the front link to the base, wherein each of the two four-rod devices can be adjusted by one of the two adjustment arms, wherein a drive device having precisely one gear mechanism motor drives the two adjustment arms.
[0004] WO 2020 / 114946 A1 discloses a longitudinal adjuster for a vehicle seat, the vehicle seat having at least one track pair, the track pair having a seat track and a floor track, the seat track can be connected to the vehicle seat, the floor track can be connected to the vehicle floor, and the seat track is displaceably guided in the longitudinal direction on the floor track. The longitudinal adjuster has a drive device for adjusting the seat track in the longitudinal direction relative to the floor track, wherein the drive device has a spindle fixed to the floor track or the seat track, a rotatable spindle nut supported on the spindle via a threaded engagement, and an electric motor actively connected to the spindle nut to drive the spindle nut. The output shaft of the electric motor on the output side is parallel to the spindle.
[0005] DE 198 08 235 C1 discloses a vehicle seat having a seat substructure and a backrest articulated to the seat substructure, the seat substructure having a base, a seat frame and an adjustment kinematic system acting between the base and the seat frame, wherein the adjustment kinematic system is in the form of a five-bar kinematic system, wherein the adjustment kinematic system has a first front link, a second front link and a rear link, wherein the first front link is pivotably articulated to the base about a first rotation axis, the second front link is pivotably articulated to the first front link about a second rotation axis, the second front link is pivotably articulated to the seat frame about a third rotation axis, the rear link is pivotably articulated to the seat frame about a fourth rotation axis, and the rear link is pivotably articulated to the base about a fifth rotation axis, wherein the adjustment kinematic system has a first actuating drive for performing a height adjustment function, wherein the angle between the second front link and the seat frame is variable by a second actuating drive in order to provide an angular position of the seat frame and the backrest. The first actuating drive has an actuating motor which has an adjustment spindle. The second actuating drive takes the form of a self-locking rotary adjuster.
[0006] DE 10 2008 053 475 A1 discloses an adjustable vehicle seat having a seat component whose inclination is adjustable by a five-bar kinematic system and a backrest which is adjustable in inclination and supported in the seat component. During a change in the inclination of the seat component, the backrest angle is compensated so that the backrest always has a constant inclination, so that the occupant can substantially maintain the inclination of his / her supported back in the changed position of the bottom and thigh supports. In one embodiment, the bearing element of the five-bar kinematic system is in the form of a connecting rod, which can change its length and whose length can be changed by an electric adjustment system, in particular an electric spindle drive.
[0007] CN 1 13 212 258A and US 2019 / 0 308 527 A1 also disclose a vehicle seat with an adjustment kinematic system in the form of a five-bar kinematic system.
[0008] DE 101 35 857 C1 discloses a motor vehicle seat component having a seat frame and a seat upholstery area which is adjustable in terms of inclination and has a motor drive via a spindle and a spindle nut which is supported in an articulated manner on a pivotable lever. The lever is connected in a rotationally secure manner to a shaft which extends transversely relative to the seat component and on which an actuating area is arranged which is radially offset relative to its pivot axis and is connected in an articulated manner to the seat upholstery area which is adjustable in terms of inclination. The height of the seat component can be adjusted by a four-bar kinematic system which is configured separately from the inclination-adjustable seat upholstery area.
[0009] In an automated motor vehicle, the vehicle driver does not have to or does not have to frequently perform steering and / or braking and acceleration activities during operation of the motor vehicle, but can operate the motor vehicle independently of the vehicle driver's actions. As a result, during automated driving, the vehicle driver can adopt a more comfortable posture than in a conventional vehicle. DE 10 2018 203 731 A1 discloses a vehicle seat, in particular a seat for an automated motor vehicle, which seat can be in a reclined position, in which position the seat member and the backrest have a certain angle, which allows the vehicle occupant to partially recline during automated driving operation. In the upright position of the vehicle seat, the vehicle driver can take over the driving of the vehicle if the automated driving operation is switched off. Summary of the invention
[0010] Technical issues
[0011] The problem addressed by the invention is to provide a vehicle seat, in particular for an autonomously driven motor vehicle, which can adopt a reclined position in which the seat member and the backrest have an angle which allows a vehicle occupant, in particular the vehicle driver, to partially recline, in particular during autonomous driving operation. In particular, in addition to being able to adopt a reclined position, the vehicle seat is also intended to have a seat height adjuster and preferably also a seat surface inclination adjuster.
[0012] The difference between seat surface tilt adjustability and providing a tilted position relates to a change in the tilt angle of the seat surface occurring in the case of seat surface tilt adjustment without a change in the tilt angle of the backrest, whereas when a tilted position is adopted, both the tilt angle of the seat surface and the tilt angle of the backrest change.
[0013] Solution
[0014] According to the invention, this problem is solved by a vehicle seat, in particular a seat for automatically driving a motor vehicle, the vehicle seat having a seat substructure and a backrest which is articulated to the seat substructure, the seat substructure having a base, a seat frame and an adjustment kinematic system which acts between the base and the seat frame for performing a height adjustment function and for moving the seat frame and the backrest into a reclined position, wherein the adjustment kinematic system is in the form of a five-bar kinematic system with a first front link, a second front link and a rear link, wherein the first front link is pivotably articulated to the base about a first axis of rotation, the second front link is pivotably articulated to the second axis of rotation a front link, a second front link pivotally articulated to the seat frame about a third rotation axis, a rear link pivotally articulated to the seat frame about a fourth rotation axis, and a rear link pivotally articulated to the base about a fifth rotation axis, wherein the vehicle seat has a first actuating drive for performing a height adjustment function and has a second actuating drive for moving the seat frame and the backrest into a tilted position, wherein in order to move the seat frame and the backrest into the tilted position by the second actuating drive, the angle between the second front link and the seat frame is variable, wherein the second actuating drive has an electric motor, a gear mechanism, a spindle nut and a spindle.
[0015] Since the second actuating drive has an electric motor, a gear mechanism, a spindle nut and a spindle, in particular a self-locking rotary adjuster for providing a third axis of rotation can be omitted. As a result, the third axis of rotation can be positioned at a higher position than in the prior art, so that a greater variation of the inclination angle of the seat surface and the backrest can be achieved. The third axis of rotation can be formed by a rotary bearing, which saves construction space and takes up less construction space than a self-locking rotary adjuster used in a vehicle seat known, for example, from DE 198 08 235 C1. In addition, the configuration of the second actuating drive as a spindle drive provides particularly good adjustment speeds, has low noise levels and is high in strength.
[0016] The first end region of the first front link can be pivotally articulated to the base about a first rotation axis. The first end region of the second front link can be pivotally articulated to the second end region of the first front link about a second rotation axis. The second end region of the second front link can be pivotally articulated to the seat frame about a third rotation axis. The first end region of the rear link can be pivotally articulated to the seat frame about a fourth rotation axis. The second end region of the rear link can be pivotally articulated to the base about a fifth rotation axis.
[0017] The first rotation axis may be arranged below the second rotation axis. The first rotation axis may be arranged below the third rotation axis. The first rotation axis may be arranged in front of the fourth rotation axis. The first rotation axis may be arranged in front of the fifth rotation axis.
[0018] The second rotation axis may be arranged below the third rotation axis. The second rotation axis may be arranged in front of the fourth rotation axis. The second rotation axis may be arranged in front of the fifth rotation axis.
[0019] The third rotation axis may be arranged in front of the fourth rotation axis. The third rotation axis may be arranged in front of the fifth rotation axis. The fifth rotation axis may be arranged below the fourth rotation axis.
[0020] Particularly in order to perform the height adjustment function, the angle between the first front link and the base and the angle between the rear link and the base can be changed by the first actuating drive. In this case, the angle between the second front link and the seat frame preferably remains constant.
[0021] Preferably, the spindle of the second actuating drive is articulated eccentrically to the second front link relative to the second rotation axis. The end region of the spindle of the second actuating drive can be articulated eccentrically to the second front link relative to the second rotation axis. The spindle of the second actuating drive can be articulated eccentrically to the first front link relative to the second rotation axis. The spindle of the second actuating drive can be connected to the first front link and the second front link along the second rotation axis. Preferably, the spindle of the second actuating drive is articulated eccentrically to the second front link relative to the third rotation axis.
[0022] The spindle of the second actuating drive can be articulated to the second front link below the third rotation axis. Preferably, an end region of the spindle of the second actuating drive is articulated to the second front link below the third rotation axis. As a result, more interior material can be arranged between the third rotation axis and an occupant of the vehicle seat, so that seat comfort can be improved.
[0023] The third axis of rotation is preferably arranged in front of the second axis of rotation so that in the event of an overload, for example a front-end collision, the second axis of rotation is away from the legs of an occupant of the vehicle seat, thereby reducing the risk of injury.
[0024] The third axis of rotation is preferably arranged in front of the first axis of rotation, thereby reducing the risk of injury, in particular to the feet of a vehicle seat occupant.
[0025] By virtue of the fact that the distance between the second rotational axis and the third rotational axis is greater than the distance between the first rotational axis and the second rotational axis, a particularly large tilting angle can be achieved during the transition into the tilted position.
[0026] The electric motor of the second actuating drive and the gear mechanism of the second actuating drive can be arranged completely below the third rotation axis. Compared with a second actuating drive formed by a self-locking rotary adjuster, more interior material can be arranged between the third rotation axis and the occupant of the vehicle seat, thereby improving the comfort of the seat.
[0027] When the seat frame and backrest are changed to the reclined position, the inclination angle of the seat surface relative to the vertical direction may be changed by the same amount as the inclination angle of the backrest relative to the vertical direction.
[0028] The first actuation drive may have an electric motor and a gear mechanism. The first actuation drive may have an electric motor, a gear mechanism, a spindle nut and a spindle. The first spindle drive may connect the rear link and the base to each other in an angularly adjustable manner. The first actuation drive may directly connect the rear link and the base to each other in an angularly adjustable manner, that is, without any intermediate connection of additional gear mechanism components. The spindle of the first actuation drive may be pivotally articulated to the rear link between the fourth rotation axis and the fifth rotation axis, wherein the gear mechanism of the first actuation drive may be fixed to the base.
[0029] The electric motor of the first actuating drive and / or the gear mechanism of the first actuating drive are preferably arranged in front of the fourth rotational axis, whereby the footwell under the vehicle seat is optimized for passengers in a seat row arranged behind the vehicle seat.
[0030] The spindle of the second actuating drive can be pivotably articulated to a connecting tube which connects the two front links to one another eccentrically with respect to the third axis of rotation, wherein the gear mechanism of the first actuating drive can be fixed to the seat frame.
[0031] In particular, in order to provide a seat surface inclination adjuster, the seat surface trim carrier can be pivotably articulated to the seat frame, in particular about a sixth rotation axis.The angle between the seat surface trim carrier and the seat frame can be adjusted by means of a third actuation drive.
[0032] The sixth rotation axis may be arranged behind the first rotation axis. The sixth rotation axis may be arranged behind the second rotation axis. The sixth rotation axis may be arranged behind the third rotation axis. The sixth rotation axis may be arranged in front of the fourth rotation axis. The sixth rotation axis may be arranged in front of the fifth rotation axis.
[0033] The base may have an adapter. The adapter may be formed or fastened to a seat rail of the base in the form of a longitudinal adjuster. The longitudinal adjuster may have at least one seat rail and a floor rail, which may be connected to the vehicle floor and on which the seat rail is displaceably guided. The longitudinal adjuster may have a fourth actuating drive for displacing the seat rail relative to the floor rail.
[0034] To summarize, in other words, the invention provides a vehicle seat with a relaxation function (the entire vehicle seat is tilted by about 20 degrees about a rear axis close to the floor) with one or two spindle drives. The height adjustment drive can be supported in a manner fixed on a track and drives only a rear link, which can be coupled thereto. The two drives can preferably be actuated independently of one another. As a result of the invention, extremely low block dimensions of in particular about 171 mm can be achieved. The term "block dimension" is intended to be understood as the spacing between the lowest position of the height adjustment of the vehicle seat relative to the vehicle floor and a theoretical sitting position, also called the H (hip) point, which is vehicle-specific. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] The invention is explained in more detail below with reference to an advantageous exemplary embodiment shown in the accompanying drawings. However, the invention is not limited to this exemplary embodiment. In the accompanying drawings:
[0036] Figure 1 : shows a highly schematic side view of a vehicle seat according to the invention,
[0037] Figure 2 : shows a perspective view of a vehicle seat according to the present invention in a non-upholstered state,
[0038] Figure 3 : Shows Figure 2 Plan view of the vehicle seat,
[0039] Figure 4 : Shows Figure 2 A side view of a vehicle seat in which the vehicle seat is in a lower height adjustment position and in an upright position,
[0040] Figure 5 : Shows Figure 2 A side view of a vehicle seat in which the vehicle seat is in an upper height adjustment position and in an upright position,
[0041] Figure 6 : Shows Figure 2 A side view of a vehicle seat in which the vehicle seat is in an upper height adjustment position and in a reclined position,
[0042] Figure 7 : Shows Figure 2 A perspective view of a vehicle seat in an upper height adjustment position and in a reclined position,
[0043] Figure 8 : Shows Figure 2 A side view of a vehicle seat in which the vehicle seat is in a lower height adjustment position and in a reclined position,
[0044] Fig. 9 : Shows Figure 2A perspective view of a vehicle seat in a lower height adjustment position and a reclined position, and
[0045] Fig.10 : Shows Figure 2 Another perspective view of a vehicle seat in which the vehicle seat is in a lower height adjustment position and a reclined position. DETAILED DESCRIPTION
[0046] Figures 1 to 10 A vehicle seat 100 according to an exemplary embodiment of the present invention is shown, wherein the vehicle seat 100 is Figure 1 2 is shown in a highly schematic manner.
[0047] The vehicle seat 100 is described below using three spatial directions extending perpendicularly to one another. The longitudinal direction x extends in the vehicle seat 100, which is installed essentially horizontally in the vehicle and is preferably parallel to the longitudinal direction of the vehicle, which corresponds to the usual direction of travel of the vehicle. The transverse direction y extending perpendicularly to the longitudinal direction x is also oriented horizontally in the vehicle and extends parallel to the transverse direction of the vehicle. The vertical direction z extends perpendicularly to the longitudinal direction x and the transverse direction y. In the vehicle seat 100 installed in the vehicle, the vertical direction z extends parallel to the vertical axis of the vehicle.
[0048] The position and direction designations used, such as front, rear, top and bottom, relate to the viewing direction of an occupant sitting in the vehicle seat 100 in a normal seating position, wherein the vehicle seat 100 is installed in a vehicle, oriented in a position suitable for transporting a person with the upright backrest 104, and conventionally oriented in the direction of travel. However, the vehicle seat 100 according to the invention may also be installed in a different orientation, for example transversely with respect to the direction of travel.
[0049] The positional and directional designations used, such as front, rear, top, bottom and transverse, relate to the viewing direction of an occupant sitting on the seat surface of the seat substructure 102 of the vehicle seat 100 in the normal seating position, wherein the vehicle seat 100 is installed in a position suitable for transporting people in a vehicle and has an upright backrest 104 and is conventionally oriented in the direction of travel. However, the vehicle seat 100 can also be installed in a different orientation, for example transversely with respect to the direction of travel. Unless otherwise stated, the vehicle seat 100 is constructed in a mirror-symmetrical manner with respect to a plane extending perpendicularly to the transverse direction y.
[0050] The vehicle seat 100 has a seat substructure 102 and a backrest 104 which is articulated to the seat substructure 102 via two fittings 106 so as to be adjustable in terms of inclination. In this case, the backrest 104 is in the form of a so-called flexion backrest, that is to say it has a plurality of backrest parts which are connected to one another in an articulated manner. Such a split backrest is known, for example, from DE 689 02 020 T2. However, the invention is not limited to vehicle seats with a curved backrest.
[0051] The vehicle seat 100 may be in the form of a so-called seat with an integrated seat belt, in which the seat belt system is substantially completely integrated in the vehicle seat 100. In this case, the upper seat belt exit point may be integrated in the upper region of the backrest 104. However, the invention is not limited to seats with an integrated seat belt.
[0052] The seat substructure 102 has a base 110 , a seat frame 120 , and an adjustment kinematic system 140 acting between the base 110 and the seat frame 120 .
[0053] In this case, the base 110 is a longitudinal adjuster which has on both sides a seat rail 112 and a floor rail 114 which can be connected to the vehicle floor and on which the seat rail 112 can be displaceably guided. On both sides, adapters 116 are respectively fastened to the seat rail 112. The adapters 116 are used in particular to connect elements of the adjustment movement system 140 to the base 110.
[0054] The seat frame 120 comprises on both sides (when viewed in the transverse direction y) seat frame side parts 122. Furthermore, the seat frame 120 has a front transverse tube 124 and a rear transverse tube 126. The two seat frame side parts 122 are arranged spaced apart from one another. The front transverse tube 124 extends between the two seat frame side parts 122 and is firmly connected to one of the two seat frame side parts 122 on both sides. The rear transverse tube 126 extends between the two seat frame side parts 122 and is rotatably supported on one of the two seat frame side parts 122 on both sides. In this case, the seat frame side parts 122 consist of a plurality of sheet metal parts connected to one another, preferably welded. However, it is also possible to use one-piece seat frame side parts on both sides.
[0055] In this case, the adjustment kinematic system 140 has (when viewed in the transverse direction y) a five-bar kinematic system on both seat sides. Since the two five-bar kinematic systems are mirror-symmetrical with respect to one another, that is, each of the five parallel axes of rotation I, II, III, IV, V extends on both sides through the rotary joints of the five-bar kinematic system, the adjustment kinematic system 140 is described below as a five-bar kinematic system. In this case, all rotary joints occur twice, that is, once on the right side of the seat of the vehicle seat 100 and once on the left side of the seat (when viewed in the transverse direction y). Therefore, unless otherwise specified below, all components of the adjustment kinematic system 140 are present on the right side of the seat and on the left side of the seat.
[0056] The adjustment movement system 140 has a first front link 142, a second front link 144 and a rear link 146 on both sides. The first front link 142 is articulated to the base 110, in this case the adapter 116 of the base 110, and is pivotally articulated around a first rotation axis I. The second front link 144 is pivotally articulated to the first front link 142 around a second rotation axis II. The second front link 144 is pivotally articulated to the seat frame 120 around a third rotation axis III. The rear link 146 is articulated to the base 110, in this case the adapter 116 of the base 110, and is pivotally articulated around a fifth rotation axis V. The rotation axes I, II, III, IV, V extend parallel to each other and parallel to the transverse direction y. Each rotation axis I, II, III, IV, V extends at a distance from all other rotation axes I, II, III, IV, V.
[0057] In order to perform the height adjustment function, the adjustment movement system 140 has a first actuation drive 160. The spacing between the base 110 and the seat frame 120 can be adjusted by means of the first actuation drive 160. To this end, the adjustment movement system 140 can be adjusted by actuating the first actuation drive 160 so that the angle α1 between the first front link 142 and the base 110, the angle α2 between the first front link 142 and the second front link 144, the angle α4 between the seat frame 120 and the rear link 146, and the angle α5 between the rear link 146 and the base 110 are variable, wherein the angle α3 between the second front link 144 and the seat frame 120 remains constant as long as the second actuation drive 170 remains inactive.
[0058] In this case, the two rear links 146 are connected to the rear transverse tube 126 in a rotationally secure manner, in particular by welding. The rear transverse tube 126 and the two rear links 146 are pivotably supported on the seat frame side part 122 of the seat frame 120 about a fourth rotation axis IV.
[0059] The first actuation drive 160 has an electric motor 162, a gear mechanism 164, a spindle nut and a spindle 166. The spindle nut is a rotatable and drivable component of the gear mechanism 164 and is preferably arranged in a gear mechanism housing of the gear mechanism 164. The first actuation drive 160 connects the rear link 146 and the base 110 to each other in an angularly adjustable manner and preferably directly, that is to say without via an additional gear mechanism component of the adjustment movement system 140. For this purpose, the spindle 166 is articulated eccentrically to the rear link 146 with respect to the fifth axis of rotation V. The motor 162 and the gear mechanism 164 are firmly connected to the adapter 116 of the base 110. The gear mechanism 164 has a spindle nut, which can be driven by the motor 162, into which the spindle 166 is screwed. By actuating the motor 162, the spindle nut rotates, so that the spindle 166 moves relative to the gear mechanism 164 and pivots the rear link 146.
[0060] In order to provide an inclined position of the seat frame 120 and the backrest 104, the adjustment movement system 140 has a second actuating drive 170. By means of the second actuating drive 170, the seat frame 120 can be raised in its front region and pivoted about the fourth rotation axis IV. Using the second actuating drive 170, the angle α3 between the second front link 144 and the seat frame 120 is adjustable, but the angle α5 between the rear link 146 and the base 110 remains constant as long as the first actuating drive 160 remains inactive. The backrest 104, which is articulated to the seat frame 120 via the fitting 106, is also pivoted rearwardly together with the seat frame 120, in this case about the fourth rotation axis IV, thereby providing an inclined position of the seat frame 120 and the backrest 104 and thus of the vehicle seat 100.
[0061] In the inclined position, the seat frame 120 and the backrest 104 are both tilted backwards relative to the upright position about an axis parallel to the transverse direction y, so that a partially horizontal position of the vehicle driver can be achieved during autonomous driving operation. The thigh angle of the vehicle driver is in an inclined position relative to the longitudinal direction x, preferably inclined by 27 degrees ± 3 degrees. The upright position of the vehicle seat 100 corresponds to a seat adjustment in which the vehicle driver can safely take over the driving of the vehicle when the autonomous driving operation is turned off.
[0062] The second actuating drive 170 has an electric motor 172, a gear mechanism 174, a spindle nut and a spindle 176. The second actuating drive 170 connects the seat frame 120 and the second front link 144 to each other in an angle-adjustable manner. To this end, the two second front links 144 are connected to each other via a connecting tube 144.1. The connecting tube 144.1 extends in parallel but has a spacing relative to the second rotation axis II and the third rotation axis III. The spindle 176 is connected to a radially protruding lever arm 144.2 of the connecting tube 144.1 in an articulated manner. The spindle end of the spindle 176 is eccentrically articulated to the connecting tube 144.1 relative to the second rotation axis II and the third rotation axis III. Therefore, the spindle 176 is eccentrically articulated to the second front link 144 relative to the second rotation axis II and the third rotation axis III. The connecting tube 144.1 is arranged in front of the front transverse tube 124. The gear mechanism 174 is pivotally articulated to the front transverse tube 124.
[0063] In order to provide a seat surface tilt adjuster, the vehicle seat 100 has a third actuating drive 180. A seat surface trim carrier (not shown in the figures) carries a trim component having a seat surface for an occupant of the vehicle seat 100. By means of the seat surface tilt adjuster, the angle between the seat surface and the longitudinal direction x can be adjusted without changing the angle of the backrest 104 relative to the vertical direction z.
[0064] The third actuating drive 180 has an electric motor 182, a gear mechanism 184, a spindle nut and a spindle 186. The third actuating drive 180 connects the seat frame 120 and the support tube 188 to each other in an angularly adjustable manner and preferably directly, that is, not via an additional gear mechanism component. In this case, the support tube 188 is pivotally eccentrically articulated to the seat frame 120 around the third rotation axis III via two metal bearing plates 188.1. The spindle 186 is connected in an articulated manner to a radially protruding lever arm 188.2 of the support tube 188.
[0065] In a modification of the exemplary embodiment, however, the support tube can also be pivoted about another axis of rotation.
[0066] The seat surface decoration carrier is, for example, a seat shell, in particular made of deep-drawn sheet metal or plastic material. The seat surface decoration carrier is pivotally hinged to the seat frame 120 around the sixth rotation axis VI. In addition, the seat surface decoration carrier is pivotally positioned on a support tube 188. The support tube 188 is arranged in front of the sixth rotation axis VI (when viewed in the longitudinal direction x).
[0067] Since the seat surface decoration carrier is pivotally articulated to the seat frame 120 about the sixth rotation axis VI and the support tube 188 is eccentrically pivotable relative to the seat frame 120 by the third actuating drive 180, in this case pivotable about the third rotation axis III, the angle between the seat surface decoration carrier and the seat surface and the seat frame 120 is adjustable by the third actuating drive 180.
[0068] The fourth actuating drive 190 serves for longitudinal adjustment, that is to say for displacing the seat rail 112 relative to the floor rail 114. The fourth actuating drive 190 has, in a manner known per se, an electric motor 192, a gear mechanism, a spindle nut and a spindle.
[0069] The vehicle seat 100 is essentially mirror-symmetrical with respect to a plane extending perpendicularly to the transverse direction y and in particular has a first actuation drive 160, a second actuation drive 170 and a fourth actuation drive 190 on both sides. The third actuation drive 180 (when viewed in the transverse direction y) is arranged in the center and is present only once. In modifications of the exemplary embodiment, one or more of the other actuation drives 160, 170, 190 may also be present only on one side.
[0070] The second exemplary embodiment not shown in the figures corresponds to the above exemplary embodiment shown in the figures, except for the differences described below. The vehicle seat of the second exemplary embodiment also has a first actuating drive, which has an electric motor, a gear mechanism, a spindle nut and a spindle. However, unlike the above exemplary embodiments, the electric motor and the gear mechanism are not connected to an adapter of the base, but are connected to the side of the seat frame.
[0071] The third exemplary embodiment not shown in the figures corresponds to the above exemplary embodiment shown in the figures, except for the differences described below. However, in the vehicle seat of the third exemplary embodiment, the connecting pipe connecting the two second front links is arranged behind the front transverse tube. In a modification of the third exemplary embodiment, the motor and the gear mechanism of the first actuating drive are also connected to the seat frame side part as in the second exemplary embodiment.
[0072] The features disclosed in the above description, the claims and the drawings may be essential for implementing the invention in its various embodiments both individually and in combination, as long as they remain within the scope of protection of the claims.
[0073] Reference numerals list
[0074] 100 Vehicle seats
[0075] 102 Seat substructure
[0076] 104 Backrest
[0077] 106 Accessories
[0078] 110 Base
[0079] 112 Seat Track
[0080] 114 Floor Track
[0081] 116 Adapter
[0082] 120 Seat frame
[0083] 122 Seat frame side
[0084] 124 Front transverse tube
[0085] 126 Rear transverse tube
[0086] 140 Adjusting the Movement System
[0087] 142 First front link
[0088] 144 Second front link
[0089] 144.1 Connecting pipe
[0090] 144.2 Lever arm
[0091] 146 Rear Link
[0092] 160 First Actuator
[0093] 162 Electric Motor
[0094] 164 Gear Mechanism
[0095] 166 Spindle
[0096] 170 Second actuating driver
[0097] 172 Electric Motor
[0098] 174 Gear Mechanism
[0099] 176 Spindle
[0100] 180 Third actuating driver
[0101] 182 Electric Motor
[0102] 184 Gear Mechanism
[0103] 186 Spindle
[0104] 188 Support tube
[0105] 188.1 Metal support plates
[0106] 188.2 Lever arm
[0107] 190 Fourth actuation driver
[0108] 192 Electric Motor
[0109] α1 angle
[0110] α2 angle
[0111] α3 angle
[0112] α4 angle
[0113] α5 angle
[0114] IFirst axis of rotation
[0115] II Second axis of rotation
[0116] III The third axis of rotation
[0117] IV Fourth axis of rotation
[0118] V Fifth axis of rotation
[0119] VI Sixth rotation axis
[0120] x longitudinal direction
[0121] y horizontal direction
[0122] z vertical direction
Claims
1. A vehicle seat (100), in particular a vehicle seat for automatically driving a motor vehicle, the vehicle seat (100) having a seat substructure (102) and a backrest (104) hinged to the seat substructure (102), the seat substructure (102) having a base (110), a seat frame (120) and an adjustment movement system (140), the adjustment movement system acting between the base (110) and the seat frame (120) for performing a height adjustment function and moving the seat frame (120) and the backrest (104) into a tilted position, wherein: The adjustment motion system (140) is in the form of a five-bar motion system having a first front link (142), a second front link (144) and a rear link (146), wherein the first front link (142) is pivotally hinged to the base (110) around a first rotation axis (I), the second front link (144) is pivotally hinged to the first front link (142) around a second rotation axis (II), the second front link (144) is pivotally hinged to the seat frame (120) around a third rotation axis (III), the rear link (146) is pivotally hinged to the seat frame (120) around a fourth rotation axis (IV), and the rear link (146) is pivotally hinged to the base around a fifth rotation axis (V). (110), wherein the vehicle seat (100), in particular the adjustment movement system (140), has a first actuating drive (160) for performing the height adjustment function, and has a second actuating drive (170) for moving the seat frame (120) and the backrest (104) to the inclined position, wherein, in order to move the seat frame (120) and the backrest (104) to the inclined position by the second actuating drive (170), the angle (α3) between the second front link (144) and the seat frame (20) is variable, characterized in that the second actuating drive (170) has an electric motor (172), a gear mechanism (174), a spindle nut and a spindle (176).
2. The vehicle seat (100) according to claim 1, characterized in that The spindle (176) of the second actuating drive (170) is articulated eccentrically to the second front link (144) relative to the second axis of rotation (II).
3. The vehicle seat (100) according to claim 1 or 2, characterized in that: The spindle (176) of the second actuating drive (170) is articulated eccentrically to the second front link (144) relative to the third rotation axis (III).
4. The vehicle seat (100) according to any one of claims 1 to 3, characterized in that The third rotation axis (III) is arranged in front of the second rotation axis (II).
5. The vehicle seat (100) according to any one of claims 1 to 4, characterized in that: The third rotation axis (III) is arranged above the second rotation axis (II).
6. The vehicle seat (100) according to any one of claims 1 to 5, characterized in that The third rotation axis (III) is arranged in front of the first rotation axis (I).
7. The vehicle seat (100) according to any one of claims 1 to 6, characterized in that The distance between the second rotation axis (II) and the third rotation axis (III) is greater than the distance between the first rotation axis (I) and the second rotation axis (II).
8. The vehicle seat (100) according to any one of claims 1 to 7, characterized in that The electric motor (172) of the second actuating drive (170) and the gear mechanism (174) of the second actuating drive (160) are arranged completely below the third rotation axis (III).
9. The vehicle seat (100) according to any one of claims 1 to 8, characterized in that When the seat frame (120) and the backrest (104) are changed to the inclined position, the inclination angle of the seat surface relative to the vertical direction (z) changes by the same amount as the inclination angle of the backrest (104) relative to the vertical direction (z).
10. The vehicle seat (100) according to any one of claims 1 to 9, characterized in that The first actuating drive (160) has an electric motor (162), a gear mechanism (164), a spindle nut and a spindle (166).
11. The vehicle seat (100) according to claim 10, characterized in that The electric motor (162) of the first actuating drive (160) and / or the gear mechanism (164) of the first actuating drive (160) are arranged in front of the fourth rotation axis (IV).
12. The vehicle seat (100) according to any one of claims 1 to 11, characterized in that The first actuating drive (160) connects the rear link (146) and the base (110) to each other in an angularly adjustable manner and preferably directly.
13. The vehicle seat (100) according to any one of claims 1 to 12, characterized in that In particular, in order to provide a seat surface tilt adjuster, the seat surface decoration carrier is pivotally articulated to the seat frame (120), in particular about a sixth rotation axis (VI), and the angle between the seat surface decoration carrier and the seat frame (120) is adjustable via a third actuating drive (180).
14. The vehicle seat (100) according to any one of claims 1 to 13, characterized in that The base (110) has an adapter (116), in particular the adapter (116) is formed or fastened to a seat rail (112) of the base (110) in the form of a longitudinal adjuster.
15. The vehicle seat (100) according to any one of claims 1 to 14, characterized in that The longitudinal adjuster has at least one seat rail (112) and a floor rail (114) which can be connected to a vehicle floor and on which the seat rail (112) is displaceably guided, and has a fourth actuating drive (190) for displacing the seat rail (112) relative to the floor rail (114).