A power seat slide device comprises a lower rail; an upper rail slidably engaged with the lower rail; an elongate threaded bolt member rotatably carried by the upper rail through first and second supporting members; a nut member connected to the lower and rail and meshed with the bolt member so that rotation of the bolt member about its axis induces a longitudinal movement of the upper rail relative to the lower rail; an electric power device for rotating the bolt member with an aid of electric power; a front shock absorbing member slidably mounted on the bolt member between the first supporting member and the nut member; and a rear shock absorbing member slidably mounted on the bolt member between the second supporting member and the nut member. When the upper rail moves to its rearmost position relative to the lower rail, the front shock absorbing member is compressed by the first supporting member and the nut member, and when the upper rail moves to its frontmost position relative to the lower rail, the rear shock absorbing member is compressed by the second supporting member and the nut member.

Power seat slide device

A mechanism used to control the vertical height as well as fore-aft position of a vehicle seat while presenting a minimum height profile when adjusted to minimum vertical elevation. The seat is connected to a pair of rails, one stationary and one reciprocable. A seat is affixed to an attachment bracket which is connected to the reciprocable rail by a vertical height adjuster comprising a vertically oriented screw jack which may be positioned to selectable heights by a motor. The fore-aft relationship of the rails may also be selectively adjusted by a motor driving a horizontally oriented screw jack. Both screw jacks incorporate a screw connected to a helical gear engaged to a worm gear. The worm gear is driven by a remote motor through a flexible drive cable. Both screw jacks present a structure which offers a minimum height profile when the seat is positioned at minimum vertical height. In this manner, an aerodynamically efficient roof line may be utilized while providing maximum head room for the vehicle occupants.

Horizontal seat position adjuster

A power seat adjuster includes a rotatable drive shaft with first and second axial ends and an intermediate arcuate portion connecting the first and second axial ends. The first and second axial ends are respectively axially connected to a drive motor gear assembly and to a driven lead screw. A horizontal drive block threadingly engaging the lead screw is rotatably and vertically translatingly mounted in an aperture in a lower track for self-alignment of the drive block with respect to the lead screw. A housing rotatably receives the axial connection between one end of the drive shaft and the lead screw. The drive nut is rotatably and translatingly mounted in a bracket fixed to an upper track for self-alignment of the drive shaft with the lead screw. A drive block engages the lead screw and is mounted for rotation and translation in a link. The upper and lower tracks have a guide section and an abutment section which collapse together in a self-cinching action under force loading to resist separation of the upper and lower tracks.

Vehicle power seat adjuster with self-aligning drive nut

A driving force transmitting apparatus having a screw for connecting to a motor and a driven member, a nut member in threadable engagement with the screw, a holder containing the nut member for connection to a fixed member, a stopper limiting relative movement between the nut member and the screw, and an elastic member covering the entire outer surface of the nut member so the elastic member and the nut member form a single body.

Driving force transmitting apparatus

A vehicular power seat slide device includes a lower rail adapted to be fixed to a vehicle body floor, an upper rail slidably mounted on the lower rail for supporting a seat device, a nut member secured to the lower rail, and a screw shaft threadably engaged with the nut member and operatively associated with a gear box. To reduce the bending moment in the screw shaft resulting from a load applied to the upper rail in the vehicle lengthwise direction, a flange is provided on the screw shaft, and a block member is secured to the upper rail between the flange and the gear box, with the block member being mounted with respect to the screw shaft to allow rotation of the screw shaft.

Vehicular power seat slide device

A power seat slide device for an automobile seat includes upper and lower guide rails and a nut and screw assembly for relative slidable movement between the upper and lower guide rails. Rollers are disposed in the lower guide rails and rotatably supported between the upper and lower guide rails. The power seat slide device further includes shoes or balls between the engagement portions provided on each of the upper and lower guide rails.

Hiroshi Nawa

Papers

Power seat slide device for vehicles