| 摘要 |
PURPOSE: To improve rigidity in the shaft direction of a hydraulic element, and to quickly adjust an error in rotary motion at installing time by energizing an elastic element connected to a base body by a floating ring piston, and allowing the elastic element to abut to a rotary body. CONSTITUTION: A hob 12 is positionally fixed by abutting to a radial directional collar or a similar stopper on the other end of a mandrel 10. A sleeve 16 engages with a screw 7 arranged on the other free end of the mandrel 10 by the plate-like flange 18 so that a base body 20 of a hydraulic clamping nut 6 is fixed to the sleeve 16 by the screw. A hydraulic duct 22 arranged in the base body 20 is sealed by packing 3, and an inside hydraulic system is clamped by plural clamping screws 23 arranged in the radial direction, so that liquid presses a ring piston 24 to an elastic flange 18 to clamp/fix the hob 12. Since radial directional adjusting force does not act on the ring piston 24, the ring piston 24 supported in a floating state is not dislocated in the shaft direction. |
