| 摘要 |
A chain saw includes a drive unit having a drive shaft, and a chain guide bar mounted to the drive unit by two bolts. The guide bar is attached to the drive unit by an insert structure which fits into a longitudinal slot of the guide bar. The insert structure can be oriented in at least two different orientations within the slot for establishing different positional relationships, respectively, between the drive shaft and a longitudinal center line of the guide bar. For example, the center line could be offset either above or below the drive shaft, or the center line could intersect the drive shaft. |
