Grey cylinder of red piston controls the fixture via gear rack drives. Clamping planes of the three racks create a variable uniform triagular prism, center of its base is stationary.
Three jaws (blue, green and violet) pivoted on brown frame center and clamp orange work under action of blue cylinder. Centers of the jaw revolution joints with the frame are …
Blue fixed cylinder of pink piston controls the gripper via chain drive. Yellow work is clamped at its inner surface by three orange levers fixed to the sprockets.
It is developed from the three-jaw self-centering chuck shown at A jaw lever (in pink) is pivoted on each green slider. Thus, the orange work (a stepped shaft) can be …
Floating cylinder moves two pink jaws synchonically. The slider-crank mechanisms of orange conrods bear inconsiderable load and ensure that displacements of the two jaws are equal.
Combination of bevel gear drive and spiral rack (scroll gear) mechanism. Turn any one of the three blue bevel pinions for moving the jaws. STEP files of video “Three-jaw self-centering …
Clamping a workpiece (in orange) by hydraulic cylinder through green wedge on the piston, two pins and two yellow levers. Pink V blocks center the workpiece along its longitudinal direction.