| 摘要 |
A blade coupling assembly includes a spindle having a base plate and a collar which fits about the drive shaft of an engine. A pair of locking pins are removably received within pockets formed on opposite sides of a central bolt opening in the base plate. A lawn mower cutting blade is provided with three corresponding openings which are aligned with the central bolt opening and the locking pins, respectively. The cutting blade is secured between the bolt head and base plate, and a spacer ring is compressed between the base plate and the end of the drive shaft. The locking pins have reduced diameter portions which are received within the blade openings, and annular shoulder portions which engage the cutting blade. When locking pins are removed from the base plate pockets, the base plate is converted for attachment to a replacement blade having upturned side flanges instead of locking pin holes. In the converted arrangement, the upturned side flanges lock the cutting blade against the sides of the base plate.
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