| 摘要 |
PURPOSE: A hydraulic chuck is provided to prevent damage to workpiece by operating a plurality of jaws with time difference. CONSTITUTION: A slider part(400) comprises a main slider and a plurality of secondary sliders. The main slider is lifted and moved within a sleeve. A plurality of secondary sliders and the main slider are lifted and moved with time difference. A moving force conveying part(500) changes the elevating movement force of the slider part into the horizontal moving force. The moving force conveying part transfers the transformed horizontal moving force to each jaw. The fluid pressure offer part selectively offers the hydraulic pressure force to the inner top and bottom spaces of the sleeve so that the slider part can be lifted and moved within the sleeve.
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