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In a longitudinal adjuster for a vehicle seat, in particular for an automobile seat, for motor-driven longitudinal adjustment of the vehicle seat (1), having a first seat rail (5) defining the longitudinal direction, a second seat rail (8) that can be made to slide relative to the first seat rail (5

In a longitudinal adjuster for a vehicle seat, in particular for an automobile seat, for motor-driven longitudinal adjustment of the vehicle seat (1), having a first seat rail (5) defining the longitudinal direction, a second seat rail (8) that can be made to slide relative to the first seat rail (5), a first drive element (11) in the first seat rail (5), and a second drive element (14) cooperating with the first drive element (11) to achieve longitudinal adjustment, the second drive element (14) being mounted in a drive casing (18) belonging to the second seat rail (8), the drive casing (18) being mounted longitudinally between two bearing plates (20) connected to the second seat rail (8), and each bearing plate (20) is firmly attached to the second seat rail (8) on at least two sides.

대표청구항 ▼

1. A longitudinal adjuster for providing motor-driven longitudinal adjustment of a vehicle seat, the longitudinal adjuster comprising:a first seat rail extending in a longitudinal direction; a second seat rail mounted: for sliding relative to the first seat rail in the longitudinal direction, and so

1. A longitudinal adjuster for providing motor-driven longitudinal adjustment of a vehicle seat, the longitudinal adjuster comprising:a first seat rail extending in a longitudinal direction; a second seat rail mounted: for sliding relative to the first seat rail in the longitudinal direction, and so that a space is defined between the first seat rail and the second seat rail; a stationary spindle firmly attached to the first seat rail, wherein the spindle is positioned in the space defined between the first seat rail and the second seat rail; a drive element mounted in a drive casing for cooperating with the spindle to cause the second seat rail to slide relative to the first seat rail in the longitudinal direction; and two bearing plates which are spaced apart from one another in the longitudinal direction, wherein: for each of the bearing plates: there is firm attachment between the bearing plate and the second seat rail proximate at least two sides of the bearing plate so that the bearing plate moves with the second seat rail relative to the first seat rail in the longitudinal direction, and the firm attachment includes at least: a first engagement between the bearing plate and the second seat rail, with the first engagement being proximate a first of the two sides of the bearing plate, and a second engagement between the bearing plate and the second seat rail, with the second engagement being proximate a second of the two sides of the bearing plate, the drive casing is mounted between the two bearing plates so that the drive casing moves with the second seat rail relative to the first seat rail in the longitudinal direction, and the second seat rail includes a plurality of openings which are each discontinuous from one another and are respectively proximate to substantial parts of the bearing plates. 2. The longitudinal adjuster according to claim 1, wherein for each of the bearing plates, the firm attachment further includes a third engagement between the bearing plate and the second seat rail, with the third engagement being proximate a third side of the bearing plate.3. The longitudinal adjuster according to claim 1, wherein for each of the bearing plates, each of the first engagement and the second engagement comprises an engagement selected from the group consisting of:an interference fit between the bearing plate and the second seat rail, and a bond between the bearing plate and the second seat rail. 4. The longitudinal adjuster according to claim 1, wherein for each of the bearing plates, each of the first engagement and the second engagement comprises a bond between the bearing plate and the second seat rail, and the bond is formed by laser welding.5. The longitudinal adjuster according to claim 1, wherein the plurality of openings of the second seat rail are sized and arranged for respectively providing access to the substantial parts of the bearing plates.6. The longitudinal adjuster according to claim 5, whereinthe substantial parts of the bearing plates include: a first part of a first bearing plate of the bearing plates, a second part of the first bearing plate, a first part of a second bearing plate of the bearing plates, and a second part of the second bearing plate; and the plurality of openings of the second seat rail includes: a first opening which is proximate the first part of the first bearing plate, a second opening which is proximate the second part of the first bearing plate, a third opening which is proximate the first part of the second bearing plate, and a fourth opening which is proximate the second part of the second bearing plate. 7. The longitudinal adjuster according to claim 1, wherein each of the bearing plates is a bearing plate section, and the bearing plate sections are part of a monolithic mounting clamp.8. The longitudinal adjuster according to claim 1, further comprising:a first impact absorber positioned between the drive casing and a first bearing plate of the bearing plates, and a second impact absorber positioned between the drive casing and a second bearing plate of the bearing plates. 9. The longitudinal adjuster according to claim 1, wherein:the spindle is a gear spindle, and the drive element is a rotating wormwheel that is screwed onto the gear spindle and driven by a drive motor via a drive worm. 10. The longitudinal adjuster according to claim 1, wherein the longitudinal adjuster is in combination with the vehicle seat so that the vehicle seat is longitudinally adjustable.11. The longitudinal adjuster according to claim 1, wherein for each of the bearing plates, each of the first engagement and the second engagement comprises an interference fit between the bearing plate and the second seat rail.12. The longitudinal adjuster according to claim 1, wherein:for each of the bearing plates, each of the first engagement and the second engagement comprises an interference fit between the bearing plate and the second seat rail, and the interference fits between the bearing plates and the second seat rail comprise the plurality of openings of the second seat rail respectively being in receipt of the substantial parts of the bearing plates. 13. The longitudinal adjuster according to claim 12, wherein for each of the bearing plates, each of the first engagement and the second engagement further comprises a bond between the bearing plate and the second seat rail.14. The longitudinal adjuster according to claim 12, whereinthe substantial parts of the bearing plates include: a first part of a first bearing plate of the bearing plates, a second part of the first bearing plate, a first part of a second bearing plate of the bearing plates, and a second part of the second bearing plate; and the plurality of openings of the second seat rail includes: a first opening which is in receipt of the first part of the first bearing plate, a second opening which is in receipt of the second part of the first bearing plate, a third opening which is in receipt of the first part of the second bearing plate, and a fourth opening which is in receipt of the second part of the second bearing plate. 15. The longitudinal adjuster according to claim 1, whereinthe substantial parts of the bearing plates include: a first part of a first bearing plate of the bearing plates, a second part of the first bearing plate, a first part of a second bearing plate of the bearing plates, and a second part of the second bearing plate; and the plurality of openings of the second seat rail includes: a first opening which is proximate the first part of the first bearing plate, a second opening which is proximate the second part of the first bearing plate, a third opening which is proximate the first part of the second bearing plate, and a fourth opening which is proximate the second part of the second bearing plate. 16. A longitudinal adjuster for providing motor-driven longitudinal adjustment of a vehicle seat, the longitudinal adjuster comprising:a first seat rail extending in a longitudinal direction; a second seat rail mounted: for sliding relative to the first seat rail in the longitudinal direction, and so that a space is defined between the first seat rail and the second seat rail; a first drive element positioned in the space defined between the first seat rail and the second seat rail; a second drive element mounted in a drive casing for cooperating with the first drive element to cause the second seat rail to slide relative to the first seat rail in the longitudinal direction; and two bearing plates which are spaced apart from one another in the longitudinal direction, wherein: for each of the bearing plates there is attachment between the bearing plate and the second seat rail so that the bearing plate moves with the second seat rail relative to the first seat rail in the longitudinal direction, the drive casing is mounted between the two bearing plates so that the drive casing moves with the second seat rail relative to the first seat rail in the longitudinal direction, the second seat rail includes a plurality of openings, the attachment includes at least: a first interference fit comprising a first opening of the plurality of openings being in receipt of a substantial first part of a first bearing plate of the bearing plates, with the first part being proximate a first side of the first bearing plate, a second interference fit comprising a second opening of the plurality of openings being in receipt of a substantial second part of the first bearing plate, with the second part being proximate a second side of the first bearing plate, a third interference fit comprising a third opening of the plurality of openings being in receipt of a substantial first part of a second bearing plate of the bearing plates, with the first part of the second bearing plate being proximate a first side of the second bearing plate, and a fourth interference fit comprising a fourth opening of the plurality of openings being in receipt of a substantial second part of the second bearing plate, with the second part of the second bearing plate being proximate a second side of the second bearing plate, wherein the first drive element is a stationary gear spindle that is firmly attached to the first seat rail, and the second drive element is a rotating wormwheel that is screwed onto the gear spindle and driven by a drive motor via a drive worm. 17. The longitudinal adjuster according to claim 16 wherein each of the bearing plates is a bearing plate section, and the bearing plate sections are part of a monolithic mounting clamp.18. The longitudinal adjuster according to claim 16, wherein the first, second, third and fourth openings are each discontiguous from one another, and the attachment further includes:a first bond proximate the first interference fit, a second bond proximate the second interference fit, a third bond proximate the third interference fit, and a fourth bond proximate the fourth interference fit. 19. The longitudinal adjuster according to claim 16, wherein the longitudinal adjuster is in combination with the vehicle seat so that the vehicle seat is longitudinally adjustable.