| 摘要 |
A belt drive tensioning device for a walk-behind mower having a power source, a transmission and shiftable between forward, neutral and reverse modes, right and left drive pulley's driven by the transmission, right and left drive belts driven by the drive pulleys, right and left ground engaging wheels driven by the drive belts, right and left idler pulleys shiftable into engagement against the drive belts for selectively placing drive tension in the drive belts, right and left biasing means for applying a force to the idler pulleys to bias the idler pulleys into engagement with the drive belts and place drive tension in said drive belts, right and left rods operatively coupled with the idler pulleys for shifting the idler pulleys toward and away from engagement with the drive belts, right and left pivotable levers coupled with the rods, the levers being independently engagable by the operator for pulling the respective rod and shifting the respective idler pulley in a direction away from engagement with the drive belt for executing a turn about the respective ground engaging wheel, a reverse bale arm operatively coupled with the rods, the bale arm being shiftable rearwardly by the operator for placing the rods in compression to press the idler pulleys against the drive belts with greater force when the transmission is in the reverse mode.
|
