| 摘要 |
An automatic belt tension control apparatus for treadmill is provided, which automatically can control the belt tension while coping with expansion change of the driving belt due to the external factor. In an automatic belt tension control apparatus for treadmill, a spindle(34) having the eccentricity axis hole in the axis hole of the outer bearing(30) is rotatably installed, a guide roll(40) makes the inner bearing axis-installed in the eccentricity axis hole of the spindle, an axial bolt(42) of the guide roll in which the Tanzi spring(50) intervenes is fixed on the side base of the motor shaft, one end(50a) of the Tanzi spring is fixed to the base, and the guide roll is axis-fixed on the base location pressing the V-belt(10).
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