Back to results
US 6,471,199 B2Granted
Electric clamp apparatus
AssigneeSMC Corporation
InventorsShigekazu Nagai, Akio Saitoh, Hiroshi Yumiba
Life of this patent
Estimating the term…
Abstract
A gear mechanism has a first gear which is coaxially connected to a drive shaft of a rotary driving source, a second gear which is meshed with the first gear, and a third gear which is meshed with the second gear and which is integrally interlocked with a ball screw nut. Diameters of the first to third gears are set to be smaller than a dimension of an upper body in a widthwise direction and a dimension of a lower body in the widthwise direction.
Claims8
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.
4 more elements
Dependencies are inferred from the claim text.