| 摘要 |
A washing machine is provided to wash workpieces having various shapes by turning the workpieces to discharge impurities of the workpieces so that productivity is improved. A washing machine includes a frame, a jig(60), and a rotation unit. The frame includes a washing room to wash the workpiece. The jig includes a clamp clamping the workpiece. The rotation unit is coupled to the jig and rotates the jig according to the signal of a controller. The rotation unit includes a first cylinder(71), a rack gear(80), a pinion gear(90), a rotational shaft(100), and a rotational arm(110). The rack gear moves by a first piston(73) of the first cylinder. The pinion gear is meshed with the rack gear. The rotational shaft is connected to the pinion gear to rotate. The rotational arm includes a first side fixed to the rotational shaft and a second side coupled to the jig. The frame includes a sensor to sense the position of the workpiece when the jig rotates.
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