Patent ID: 7111835
Filing Date: 2006-09-26
Classification: B25B,F04B

Abstract:
1. A clamp apparatus for gripping a workpiece by a rotatable clamp arm, comprising: a main body; a rotary driving section which has a rotary driving source that is rotated in accordance with an electric signal; a pump mechanism which includes a pressure oil-sucking/discharging mechanism that sucks/discharges pressure oil by a rotary driving force of said rotary driving source; a cylinder mechanism provided with a piston, said piston being displaceable in an axial direction when pressed by said pressure oil fed from said pump mechanism; a retaining mechanism which retains said pressure oil; and a toggle link mechanism which converts rectilinear motion of said piston driven by said cylinder mechanism into a rotary motion of said clamp arm, said rotary driving section, said pump mechanism, said cylinder mechanism, and said retaining mechanism being integrally assembled to said main body.