| 摘要 |
A wood-turning lathe includes a driven shaft and a drive shaft journalled on a headstock body. A speed change device includes a first pulley unit mounted on the drive shaft, and having a first fixed pulley and a first movable pulley that cooperatively define therebetween a first belt receiving space and that form a radially and outwardly diverging first belt-engaging surface. A control unit has an operable knob which is exposed from the headstock body and which is operably associated with the first movable pulley. A second pulley unit is mounted on the driven shaft, and has a second fixed pulley and a second movable pulley which cooperatively define therebetween a second belt receiving space and which form a radially and outwardly diverging second belt-engaging surface. A non-elastic belt interconnects the first and second pulley units, and is frictionally slidable along the first and second belt-engaging surfaces.
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