| 摘要 |
A pointing bar fatigue testing apparatus for fatigue testing upon various shapes of pointing bars includes a power source, a force feeding device and a pointing bar seat. The power source includes a motor and a rotation spindle extending upwardly. The force feeding device includes a flat board engaged with and rotationally driven by the spindle, a slide bar having a center bore and two ends engageable with two border flanges located at two ends of the flat board and a spring engaged with one end of the slide bar for exerting force on the center bore. The pointing bar seat is located above the force feeding device. When performing pointing bar fatigue testing, the pointing bar has one end fixed on the pointing bar seat and another end engaged with the center bore to receive a spring force through the center bore while the force feeding device is rotated by the power source.
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