US 12,145,475 B2
Longitudinal adjuster, method for assembling a longitudinal adjuster, and vehicle seat
Erik Sprenger, Wermelskirchen (DE); and Maros Rovny, Adamovske Kochanovce (SK)
Assigned to Adient US LLC, Plymouth, MI (US)
Appl. No. 18/247,667
Filed by ADIENT US LLC, Plymouth, MI (US)
PCT Filed Oct. 15, 2021, PCT No. PCT/IB2021/059515
§ 371(c)(1), (2) Date Apr. 3, 2023,
PCT Pub. No. WO2022/079685, PCT Pub. Date Apr. 21, 2022.
Claims priority of application No. 10 2020 127 390.8 (DE), filed on Oct. 16, 2020; and application No. 10 2021 100 601.5 (DE), filed on Jan. 14, 2021.
Prior Publication US 2024/0017642 A1, Jan. 18, 2024
Int. Cl. B60N 2/02 (2006.01); B60N 2/06 (2006.01)
CPC B60N 2/02246 (2023.08) [B60N 2/067 (2013.01); B60Y 2304/074 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A longitudinal adjuster, comprising:
at least one pair of rails formed from a first rail and a second rail, wherein the first rail and the second rail, in particular in a longitudinal direction, and are displaceable relative to each other, wherein the first rail and the second rail form an internal duct, wherein the internal duct comprises a spindle nut, connected to the second rail, and a spindle, operatively connected to the spindle nut; wherein the first rail comprises a spindle drive which is able to be driven by a motor and interacts with the spindle, wherein the spindle nut is fixed to the second rail by a first fixing element and a second fixing element, wherein the spindle nut by the two fixing elements is centered perpendicularly to a longitudinal extent of the second rail, in a transverse direction, wherein the first fixing element is fixed relative to a first through opening in the second rail, and the second fixing element is fixed relative to a second through opening in the second rail,
wherein the first fixing element relative to the first through opening, and the second fixing element relative to the second through opening, are centered perpendicularly to the longitudinal extent of the second rail,
wherein the two fixing elements each have a shank, which has an external thread, and a head portion, wherein a transition region between the shank and the head portion has in each case one cone, wherein the fixing elements each have the same size and shape,
wherein the first through opening has a different shape than the second through opening in the longitudinal direction,
wherein each cone longitudinally centers the fixing element in the assigned through opening despite the assigned through openings having different shapes compared to one another,
wherein the cones of the fixing elements deform first and second longitudinal contact edges of peripheral regions of the respective through openings,
wherein at least one longitudinal gap is located between the cone of the second fixing element and a transverse contact edge of the second through opening to provide a longitudinal tolerance for the spindle nut relative to the second rail.