| 摘要 |
An engine is connected to the upper end of a drive shaft housing and a work head with a string trimmer or blower or both is operatively connected to the lower end of the drive shaft housing and is rotatably driven by an engine rotating a drive shaft inside the drive shaft housing and connected to the working head. The drive shaft housing is rigidly connected to the working head and may be rotated about its longitudinal axis relative to the engine in any desired amount of rotation, but the preferred degree of rotation is 135° to move the working head from a trimming position with the rotating trimmer string in a horizontal position to an edging position with the rotating trimmer string in a vertical position and with the working head being displaced to the operator's right side for better viewing and control and operator comfort. In one embodiment, a gear driven crank handle is rigidly connected to the drive shaft housing and is itself rotated 135° as the drive shaft housing is rotated 135° to place the handle in a position that is comfortable to use. Further, the amount of air flowing through the blower is regulated by an air outlet regulating valve and a separate air intake regulating valve.
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