| 摘要 |
A swing assembly includes a support stand, a swing mounted on the support stand to swing back and forth along a swing arc, and a swing driver. The swing driver includes a drive belt coupled to the swing, a belt tensioner coupled to the drive belt to place the drive belt in tension, and a belt driver coupled to the drive belt. The belt driver moves the drive belt relative to the support stand while the drive belt remains in tension to apply force to the swing to sustain swinging movement of the swing along the swing arc. The drive belt includes a strap having a fixed end coupled to the support stand and a free end coupled to the belt tensioner. The drive belt has drive teeth that are appended to the strap and coupled to the belt driver.
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