Device for swiveling and tilting vehicle seat
A device for swiveling and tilting a vehicle seat is provided. The device performs a swiveling operation to enable the vehicle seat to be rotated in a desired direction using a motor driving force and a gear/screw operating mechanism associated with the motor driving force. The device also performs a tilting operation to enable the vehicle seat to be tilted backwards by a desired angle using the motor driving force and a lead screw/link operating mechanism associated with the motor driving force.
1. A device for swiveling and tilting a vehicle seat, comprising;
a track panel mounted on a floor panel;
a hinge bracket mounted on the track panel;
a stationary plate mounted on a seat cushion frame;
a first screw coupling body mounted on a lower portion of the stationary plate;
a second screw coupling body configured to be tiltably mounted on the hinge bracket;
a first motor configured to provide a rotational driving force to the first screw coupling body or the second coupling body for swiveling the vehicle seat when the first screw coupling body and the second coupling body are screw-coupled with each other;
a second motor mounted on the track panel for tilting the vehicle seat; and
a tilting link hinge-connected between a front end portion of the second screw coupling body and an output shaft of the second motor.
2. The device for swiveling and tilting a vehicle seat of claim 1 , wherein the first screw coupling body is provided as a cylindrical body having a female thread formed on an inner circumferential surface thereof and is mounted on an edge of a lower surface of the stationary plate.
3. The device for swiveling and tiling a vehicle seat of claim 2 , wherein the second screw coupling body is provided as a cylindrical body having a male thread formed on an outer circumferential surface thereof, and a motor mounting plate for mounting the first motor is mounted on an inner circumferential surface of the second screw coupling body, both sides of the second screw coupling body are hinge-coupled to the hinge bracket.
4. The device for swiveling and tilting a vehicle seat of claim 3 , wherein a pinion gear is mounted to an output shaft of the first motor, and a sector gear that engages the pinion gear is formed on the lower surface of the stationary plate.
5. The device for swiveling and tilting a vehicle seat of claim 1 , wherein a pair of guide brackets are mounted on the track panel, each of the guide brackets has an elongated slot formed thereon, and guide pins formed on both sides of a rear end portion of the tilting link are inserted into the slots of the guide brackets, respectively.
6. The device for swiveling and tilting a vehicle seat of claim 1 , wherein a link connecting end is integrally formed with a front portion of the inner circumferential surface of the second screw coupling body to be hinge-coupled with the tilting link.
7. The device for swiveling and tilting a vehicle seat of claim 1 , wherein first hinge ends are integrally formed with both sides of the hinge bracket, respectively, and second hinge ends are integrally formed at lower end portions of both sides of the second screw assembly, respectively, wherein each of the second hinge ends overlaps and is coupled with a corresponding first hinge end by a hinge pin.
8. The device for swiveling and tilting a vehicle seat of claim 1 , wherein the first screw coupling body is provided as a cylindrical body having a male thread formed on an outer circumferential surface thereof and is mounted on a lower surface of the stationary plate.
9. The device for swiveling and tilting a vehicle seat of claim 8 , wherein the second screw coupling body is provided as a cylindrical body having a female thread formed on an inner circumferential surface thereof, and both sides of the second screw coupling body are hinge-coupled to the hinge bracket.
10. The device for swiveling and tilting a vehicle seat of claim 9 , wherein the first motor having a driving bevel gear mounted on the output shaft thereof is mounted on a predetermined position of the lower surface of the stationary plate, and a driven bevel gear that engages the driving bevel gear is formed on an upper surface of the second screw coupling body.
11. The device for swiveling and tilting a vehicle seat of claim 10 , wherein a plurality of deviation preventing ribs which are arranged alternately and spaced from each other are integrally formed on the lower surface of the stationary plate and on the upper surface of the second screw coupling body along a circumferential direction.
12. The device for swiveling and tilting a vehicle seat of claim 1 , wherein the track panel has slide rails formed on both sides of a lower surface thereof, respectively, for adjusting front-rear positions of the vehicle seat.