| 摘要 |
A linear ball bearing unit made of a linear ball bearing and an elongated track shaft as well as a method for manufacturing the bearing unit. The linear ball bearing consists of balls, a half-split bearing case, which in turn is formed by splitting an elongated square bar presenting a plurality of guide grooves for the balls along diametrically opposing two grooves, and a half-split ball retainer also presenting a plurality of guide grooves of the balls. The elongated track shaft is assembled with said linear ball bearing. The line passing through a first point of contact between a loaded ball and its corresponding R-groove in the track shaft and a second point of contact between the same loaded ball and its corresponding R-groove in the bearing case meets a horizontal line at an acute angle. The line passing through a third point of contact between another R-groove in the track shaft and one of the balls in the same groove and a fourth point of contact between the same one of the balls and its corresponding R-groove in the bearing case meets a vertical line at an acute angle. Such angles impart strength, particularly against upward thrust. |
