Power slide device for vehicle seat
AssigneeShiroki Corporation
InventorsAkihiro Kimura, Hirohito Aoi, Toshiharu Ito
Life of this patent
Estimating the term…
Abstract
In a power slide device for vehicle seat which moves an upper rail in the forward/rearward direction by rotationally driving a screw rod, by providing a screw rod supporting rail with a pair of load transmitting members that are spaced from each other in the forward/rearward direction and providing the screw rod with a load receiving member which is in contact with the pair of load transmitting members, bucking is supported at a plurality of points when the buckling occurs in the screw rod due to an axial force acting on the screw rod, and this limits the direction of the buckling to reduce the amount of the buckling.
Claims20
A power slide device for vehicle seat, comprising:
- a lower rail disposed on a floor surface of a vehicle;
- an upper rail disposed on a seat and engaged with said lower rail in a slidable manner;
- a screw-rod which is rotatably supported by a screw-rod supporting rail, wherein one of said upper rail and said lower rail comprises said screw-rod supporting rail;
- a gear box, provided at an end of said screw-rod supporting rail, for rotationally driving said screw-rod;
- a feed-nut which is screw-engaged with said screw-rod and fixed to a feed-nut supporting rail, wherein the other of said upper rail and said lower rail comprises said feed-nut supporting rail;
- a pair of load transmitting members which are held by said screw-rod supporting rail at positions spaced from each other in an extension direction of said screw-rod supporting rail;
- and
- at least one load receiving member which is positioned between said pair of load transmitting members and provided on said screw-rod in a manner to restrict a position of said load receiving member on said screw-rod in an axial direction thereof,
- wherein said feed-nut supporting rail and said screw-rod supporting rail are respectively provided with openings which face each other, and
- wherein said pair of load transmitting members are provided with force application portions that are positioned closer to an opening of said screw-rod supporting rail than said screw-rod.
Dependencies are inferred from the claim text.