A seat slide apparatus for a vehicle, the seat slide apparatus includes: a lower rail which is fixed to a vehicle floor; an upper rail which is slidably engaged with the lower rail; and a rolling element circulation unit having rolling elements and interposed between the lower rail and the upper rail in a state where the rolling elements are able to be circulated, in which the lower rail includes a bottom wall portion, sidewall portions, and upper wall portions, the upper rail includes a main body portion, and folded-back portions, the rolling element circulation unit includes a case having an annular accommodating path accommodating the rolling elements, between the lower rail and the upper rail, an upper rolling element circulation unit and a lower rolling element circulation unit are provided to be disposed at two positions spaced apart from each other, and the upper rail includes a pedestal portion.

An end module of a linear guideway includes an end cap, a cover, and a lubricating sheet. The end cap has an accommodating trough, and the cover is installed on the end cap to cover the accommodating trough, so a surface of the end cap faces a surface of the cover. At least one supporting pillar is formed on one of the two facing surfaces of the end cap and the cover, and the supporting pillar abuts against the other one of the two facing surfaces of the end cap and the cover. The lubricating sheet is received in the accommodating trough. The lubricating sheet has at least one penetrating hole, and the supporting pillar is inserted into the penetrating hole. Thus, the lubricating sheet of the instant disclosure is provided without any deformation, which is caused by the end cap and the cover.

There is provided a linear motion guide device that is reduced in a contact surface pressure between a ball and a raceway groove so that an occurrence of an edge load can hardly occur, even when any of a pressing load, a tensile load, and a lateral load is applied to a slider. Upper flanks and lower flanks included in raceway grooves of a guide rail and a slider each include: a main arc portion having an arc-shaped section and placed generally in a center of the flank in a width direction; a groove shoulder side sub-arc portion having an arc-shaped section and formed continuously from a groove shoulder side of the main arc portion; and a groove bottom side sub-arc portion having an arc sectional shape and formed continuously from a groove bottom side of the main arc portion. Further, a curvature radius of the groove shoulder side sub-arc portion is different from a curvature radius of the groove bottom side sub-arc portion.

A rolling device includes: an inner member that has a raceway face; an outer member that has a raceway face facing the raceway face; and rolling elements that are disposed between both raceway faces in a rollable manner, wherein at least one of the inner member and the outer member has a space formed therein. Further, a method for manufacturing a rolling device including an inner member that has a raceway face, an outer member that has a raceway face facing the raceway face, rolling elements that are disposed between both raceway faces in a rollable manner, and a space that is formed inside at least one of the inner member and the outer member by a 3D printer.

An end module of a linear guideway includes an end cap, a cover, and a lubricating sheet. The end cap has an accommodating trough, and the cover is installed on the end cap to cover the accommodating trough, so a surface of the end cap faces a surface of the cover. At least one supporting pillar is formed on one of the two facing surfaces of the end cap and the cover, and the supporting pillar abuts against the other one of the two facing surfaces of the end cap and the cover. The lubricating sheet is received in the accommodating trough. The lubricating sheet has at least one penetrating hole, and the supporting pillar is inserted into the penetrating hole. Thus, the lubricating sheet of the instant disclosure is provided without any deformation, which is caused by the end cap and the cover.

Provided is a linear motion guide device that is less noisy and excellent in operability. A concave groove of a return guide and a raceway groove of a slider are not smoothly continued at a connection portion therebetween, where a stepped portion is formed. At a groove bottom portion of the raceway groove of the slider and the neighboring portion thereof, the surface of the raceway groove of the slider is located to be closer to a curvature center of the raceway groove of the slider than the surface of the concave groove of the return guide is. At a groove shoulder portion of the raceway groove of the slider and the neighboring portion thereof, the surface of the concave groove of the return guide is located to be closer to the curvature center of the raceway groove of the slider than the surface of the raceway groove of the slider is.

This rolling device 10 includes an inner member 11 provided with a rolling element rolling groove 11a, and an outer member 21 attached to the inner member 11 to be relatively movable via a plurality of roiling elements 12. The outer member 21 includes an outer member main body portion 22 including a loaded rolling element rolling groove 25 forming a loaded rolling element rolling raceway in cooperation with the rolling element rolling groove 11a and a non-loaded rolling element rolling raceway 33 arranged to correspond to the loaded rolling element rolling groove 25, and a pair of lids 24 attached to both end surfaces of the outer member main body portion 22 in a relatively-moving direction and having at least a part of a direction changing raceway 35 connecting one end of the loaded rolling element rolling raceway to one end of the non-loaded rolling element rolling raceway 33. Each of the lids 24 is provided with a projection portion 24b including at least the part of the direction changing raceway 35. Also, the projection portion 24b is provided with a lubricant supply path 38. With this configuration, this rolling device 10 can circulate the plurality of rolling elements smoothly in an endless circulation raceway.