Serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device

A serially-connected ball screw pair and piezoelectric actuator macro-micro driving and guiding device, comprising:

• a sliding table (11) and a sliding seat (1) disposed up and down, with one ball screw pair and two sliding table guide rail pairs disposed therebetween, the two sliding table guide rail pairs being located at two sides of the ball screw pair, respectively, and wherein each one of the sliding table guide rail pairs includes a guide rail bar (4), fixed on the upper surface of the sliding seat (1), and two sliders (5) embedded in the guide rail bar, and wherein the ball screw pair includes a ball screw (2) and a nut (3) inserted on the ball screw (2);
• a nut seat (6) disposed on the nut (3);
• and
• nut seat guide rail pairs, a micro-moving table (8) and a piezoelectric actuator (7) disposed on the nut seat (6), wherein one end of the piezoelectric actuator (7) is fixedly connected with the nut seat (6), the other end thereof is fixedly connected with the micro-moving table (8), the upper surfaces of the slider (5) and the micro-moving table (8) are fixed on the lower surface of the sliding table (11);
• and
• wherein the nut seat (6) comprises a nut seat body (6-3), side wings (6-1) and a protrusion (6-2) disposed on a front portion of the upper surface of the nut seat body (6-3);
• the side wings (6-1) are disposed at two sides of the nut seat body (6-2), respectively;
• the nut seat body (6-3) is provided with a hole, and the nut (3) is fixedly mounted in the hole of the nut seat body (6-3);
• the micro-moving table (8) is disposed on a back portion of the upper surface of the nut seat body (6-3), one end of the piezoelectric actuator (7) is fixedly connected to the protrusion (6-2), and the other end thereof is fixedly connected to the micro-moving table (8);
• and sliders (12) are fixed on the lower surfaces of the two side wings, and the sliders (12) as nut seat guide rail pairs are embedded in the guide rail bars (4).