The electric power clamping device driven by stepmotor and screw-togge-lever force amplifier in series

Hydraulic clamping device is widely used in modern manufacturing. But, the energy efficiency of a hydraulic clamping device is lower and the environmental pollution is serious. We introduce a new type of electrical power clamping device in this paper. Its working principle is, by using the screw-toggle-lever three-step series force-amplifier, the rotary motion of the stepmotor is changed into linear motion of the clamping component. Using the self-locking performance of sliding screw mechanism, we can always maintain the clamping force acting on the workpiece during manufacturing process. This clamping device has the following advantages: (1) very compact in structure, (2) saves energy and protects environment against pollution.