Patent ID: 6471199
Filing Date: 2002-10-29
Classification: B25B

Abstract:
An electric clamp apparatus capable of clamping a workpiece by using a rotatable clamp arm, said electric clamp apparatus comprising:a main body section; a rotary driving source which is driven and rotated in accordance with an electric signal; a gear mechanism which transmits rotary driving force of said rotary driving source; a feed screw mechanism which includes a feed screw shaft for converting rotary motion transmitted by said gear mechanism into rectilinear motion; and a toggle link mechanism which converts said rectilinear motion transmitted by said feed screw mechanism into rotary action of said clamp arm, wherein: said gear mechanism has a first gear which is coaxially connected to a drive shaft of said rotary driving source, a second gear which is provided with second teeth for being meshed with first teeth of said first gear and which is arranged substantially in parallel to an axis of said drive shaft, and a third gear which is provided with third teeth for being meshed with said second teeth of said second gear and which is integrally interlocked with a feed screw nut, and diameters of said first to third gears are set to be smaller than dimensions of said main body section in a widthwise direction.