Abstract: A vehicle seat slide device includes lower rails, upper rails, screw shafts, nut members, an electric motor and a transmission mechanism. The transmission mechanism is composed of a drive reduction gear mechanism coupled directly to an output shaft of the electric motor, a pair of left and right direction conversion gear mechanisms coupled directly to the screw shafts, and a transmission shaft arranged to pass through an output gear of the drive reduction gear mechanism to be rotatably bodily with the output gear and coupled at opposite ends thereof to respective input gears of the direction conversion gear mechanisms. A lean force bracket is further provided to be secured at opposite ends thereof to the upper rails and supports the drive reduction gear mechanism and both of the direction conversion gear mechanisms.

Abstract: A feeding apparatus includes a screw shaft, a feeding nut, a supporting member, a driving unit, an intermediate member supported by the screw shaft and arranged to be rotatable relative to the supporting member, and an elastic biasing mechanism. The intermediate member includes a radial sliding contact surface slidably contacting a radial bearing surface of the supporting member, first and second thrust sliding contact surfaces contacting first and second thrust bearing surfaces formed at the supporting member, respectively. The elastic biasing mechanism elastically biases the first and second thrust sliding contact surfaces of the intermediate member to contact the first and second thrust bearing surfaces, respectively, and further elastically biases the intermediate member to a thrust receiving member provided at the screw shaft for assembling the intermediate member and the thrust receiving member onto the screw shaft without a clearance between the intermediate member and the thrust receiving member.

Abstract: A power seat slide apparatus includes a lower rail, an upper rail supported by the lower rail and having a pair of walls, a lead screw member rotatably supported by the upper rail, a lead screw nut member provided at the lower rail and threadedly engaged with the lead screw member, an output rotation member provided at the upper rail and connected to the lead screw member, a gearbox rotatably supporting the output rotation member, a drive unit transmitting a rotational drive force to the lead screw member via the output rotation member, and a pair of cut-and-bent-away portions, each cut-and-bent-away portion being formed on each of the walls of the upper rail and being arranged at positions to face the lead screw nut member and to contact the lead screw nut member at stroke ends of the upper rail in a front-rear direction thereof.

Abstract: A vehicle seat slide device includes lower rails, upper rails, screw shafts, nut members, an electric motor and a transmission mechanism. The transmission mechanism is composed of a drive reduction gear mechanism coupled directly to an output shaft of the electric motor, a pair of left and right direction conversion gear mechanisms coupled directly to the screw shafts, and a transmission shaft arranged to pass through an output gear of the drive reduction gear mechanism to be rotatably bodily with the output gear and coupled at opposite ends thereof to respective input gears of the direction conversion gear mechanisms. A lean force bracket is further provided to be secured at opposite ends thereof to the upper rails and supports the drive reduction gear mechanism and both of the direction conversion gear mechanisms.