Green Manufacturing: a Pumpless Mechanical-Hydraulic Clamping Device Based on Wormgear and Crank-Slider Mechanism

Abstract

Hydraulic transmission clamping device may cause environmental pollution due to the existing of fluid pump and open oil tank. A new-concept clamping device based on high flexibility of hydraulic is introduced in this paper. Without any pump and open oil tank, environments pollution is reduced to a very low level. The driving piston is actuated by combined wormgear and crank-slider mechanism, the clamping piston is driven by sealed fluid in the two cylinders. The self-locking wormgear provides continuous clamping force during machining without any added energy, and a pressure switch guarantees the safety of operation. There are many choices when we considering the power sources, it could be electrical motor with proper speed reducer or just manpower, which provide a rotation movement. The working principle and mechanical calculation formulas are presented in this paper, which is instructive to the industrial field.