Vehicle seat position adjustment device

Patent metadata

Field	Value
Publication number	US-2025115170-A1
Application number	US-202418410067-A
Country	US
Kind code	A1
Filing date	Jan 11, 2024
Priority date	Oct 6, 2023
Publication date	Apr 10, 2025
Grant date	—

Abstract

A vehicle seat position adjustment device is configured to stably perform a tilting operation of a seat cushion by performing an operation of rotating a first tilting link hinged to a gear box in a standing direction of a first tilting link while the gear box is moved rearwards along a lead screw, an operation of pushing up a second tilting link hinged to the first tilting link while the first tilting link is rotated in a standing direction, and an operation of allowing the second tilting link to push up a front end of a seat cushion frame. The vehicle seat position adjustment device may achieve a relaxation comfort posture by tilting the seat cushion and simultaneously reclining a seatback connected to the seat cushion rearwards.

First claim

What is claimed is:

1 . A vehicle seat position adjustment device comprising:
a first fixing bracket and a second fixing bracket respectively mounted on front ends of a pair of seat rails; a seat cushion frame hinged to side frames respectively mounted on rear ends of the seat rails; a first tilting link hinged to the first fixing bracket; a second tilting link hinged to the second fixing bracket; and a driving device connected to the first tilting link and the second tilting link and configured to transmit, to the first tilting link and the second tilting link, rotational force to tilt the seat cushion frame.

2 . The vehicle seat position adjustment device of claim 1 , wherein the driving device comprises:
a first gear box hinged to the first tilting link and configured to transmit the rotational force to the first tilting link; a first lead screw inserted into and coupled to the first gear box in a forward-and-rearward direction so as to move the first gear box forwards and rearwards, wherein the first lead screw has a rear end hinged to a connection frame configured to connect the pair of seat rails; a second gear box hinged to the second tilting link and configured to transmit the rotational force to the second tilting link; a second lead screw inserted into and coupled to the second gear box in the forward-and-rearward direction so as to move the second gear box forwards and rearwards, wherein the second lead screw has a rear end hinged to the connection frame configured to connect the pair of seat rails; and a double-shaft motor connected to the first gear box and the second gear box so as to transmit the rotational force to the first gear box and the second gear box.

3 . The vehicle seat position adjustment device of claim 2 , further comprising:
a first front link having one end hinged to the first tilting link and another end hinged to a first front end of the seat cushion frame; and a second front link having one end hinged to the second tilting link and another end hinged to a second front end of the seat cushion frame.

4 . The vehicle seat position adjustment device of claim 3 , wherein the first tilting link has a 1-1 hinge end formed at an upper end thereof and hinged to the first gear box, a 1-2 hinge end formed at a front end thereof and hinged to the first front link, and a 1-3 hinge end formed at a lower end thereof and hinged to the first fixing bracket.

5 . The vehicle seat position adjustment device of claim 3 , wherein the second tilting link has a 2-1 hinge end formed at an upper end thereof and hinged to the second gear box, a 2-2 hinge end formed at a front end thereof and hinged to the second front link, and a 2-3 hinge end formed at a lower end thereof and hinged to the second fixing bracket.

6 . The vehicle seat position adjustment device of claim 2 , wherein the first lead screw passing through the first gear box and the second lead screw passing through the second gear box have stopper nuts respectively coupled to front ends thereof, wherein each of the stopper nuts limits a maximum forward distance of the first gear box and the second gear box.

7 . The vehicle seat position adjustment device of claim 2 , wherein the double-shaft motor has a support plate mounted thereon, wherein the support plate is connected to the first gear box and the second gear box and supports the double-shaft motor.

8 . The vehicle seat position adjustment device of claim 7 , wherein the first gear box has a first cover bracket mounted on a circumferential portion thereof, wherein the first cover bracket comprises an outer plate hinged to an upper end of the first tilting link and a connection end coupled to one end of the support plate.

9 . The vehicle seat position adjustment device of claim 7 , wherein the second gear box has a second cover bracket mounted on a circumferential portion thereof, wherein the second cover bracket comprises an outer plate hinged to an upper end of the second tilting link and a connection end coupled to another end of the support plate.

10 . The vehicle seat position adjustment device of claim 2 , wherein the connection frame has hinge brackets mounted thereon and respectively hinged to the rear end of the first lead screw and the rear end of the second lead screw.

11 . The vehicle seat position adjustment device of claim 2 , wherein a flexible cable is adopted for a first rotation transmission shaft and a second rotation transmission shaft, wherein the first rotation transmission shaft connects one output part of the double-shaft motor to an input part of the first gear box, and the second rotation transmission shaft connects the other output part of the double-shaft motor to an input part of the second gear box.

12 . The vehicle seat position adjustment device of claim 1 , further comprising:
first and second height adjustment links having upper ends respectively hinged to opposite rear ends of the seat cushion frame and lower ends respectively hinged to opposite rear ends of the side frames; a sector gear formed at a front portion of the upper end of the first height adjustment link; a height adjustment motor mounted on one rear end of the seat cushion frame; and a pinion mounted on an output shaft of the height adjustment motor and engaged with the sector gear.

13 . The vehicle seat position adjustment device of claim 11 , wherein the first height adjustment link has a curved slot formed at an upper portion thereof and formed to penetrate the upper portion, wherein the curved slot limits a lifting distance of the seat cushion frame, and the seat cushion frame has a guidance pin formed to protrude from the one rear end thereof and movably inserted into the curved slot.

14 . A vehicle seat comprising the vehicle seat adjustment device of claim 1 .

15 . A vehicle comprising the vehicle seat adjustment device of claim 1 .

16 . A method of operating a vehicle seat position adjustment device, the method comprising:
providing a vehicle seat position adjustment device comprising:
a first fixing bracket and a second fixing bracket respectively mounted on front ends of a pair of seat rails;
a seat cushion frame hinged to side frames respectively mounted on rear ends of the seat rails;
a tilting link comprising a first tilting link hinged to the first fixing bracket and a second tilting link hinged to the second fixing bracket; and
a driving device connected to the first tilting link and the second tilting link and configured to transmit, to the first tilting link and the second tilting link, rotational force to tilt the seat cushion frame;
performing a tilting operation of a seat cushion by rotating a tilting link hinged to a gear box in a standing direction of the tilting link while the gear box is moved rearwards along a lead screw; pushing up a front link hinged to the tilting link while the tilting link is rotated in the standing direction, and allowing the front link to push up a front end of the seat cushion frame.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp
• Faurecia Korea Ltd
• Hyundai Transys Inc

Inventors

• Lee Sang Soo
• Jung Ho Suk
• Lim Deok Soo
• Park Sang Do
• Jung Chan Ho
• Kim Mu Young
• Kim Jin Sik
• Joo Youn Myung
• Shin Dong Gyu
• Nam Taek Jun
• Park Gun Chu

Classifications

• B60N2/164

  Linear actuator, e.g. screw mechanism · CPC title

• B60N2/1695 Primary

  with simultaneous height and inclination adjustment · CPC title

• B60N2/10 Primary

  tiltable (B60N2/12 {, B60N2/2875} take precedence) · CPC title

• B60N2/02246 Primary

  Electric motors therefor · CPC title