Patent ID: 6354580
Filing Date: 2002-03-12
Classification: B25B

Abstract:
An electric clamp apparatus capable of gripping a workpiece by means of a rotatable clamp arm, said clamp apparatus comprising:a rotary driving source for making rotary driving in accordance with an electric signal; a gear mechanism for transmitting rotary driving force of said rotary driving source; a feed screw mechanism for converting rotary motion transmitted by said gear mechanism into rectilinear motion; and a toggle link mechanism for converting said rectilinear motion transmitted by said feed screw mechanism into rotary action of said clamp arm, wherein: said gear mechanism includes a first gear which is coaxially connected to a drive shaft of said rotary driving source, and a second gear which is provided with second teeth to be meshed with first teeth of said first gear and which is arranged substantially in parallel to an axis of said drive shaft, and said second gear is rotatable integrally with a nut member which is provided for said feed screw mechanism by the aid of a connecting member.