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LEVER MECHANISM OF A HYDRAULIC ROLLER-TYPE CLAMPING DEVICE

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Two triangular plates 1 are linked together with turning pairs by crosspiece 2 and rocker arm 4. Rocker arm 4 turns about fixed axis A and is connected by turning pairs B and C to plates 1 and to link 6, which, in turn, is connected by turning pair D to the rod of piston 5. Pressfitted into the triangular plates are four axies on which four rollers are mounted and rotate. Two rollers 7 roll and slide along horizontal slots in the body of the device, and two rollers 8 along vertical slots. When piston 5 moves downward by the action of fluid delivered to the upper end of the cylinder, plates 1 turn about point O, tending to position all the axes of the rollers in a single vertical plane. At this, crosspiece 2, together with inserted clamping bolt 3, moves downward, turning clamp 10 about fixed axis E to clamp workpiece 9 which is located by V-block 11. To release the workpiece, liquid is delivered to the bottom end of the cylinder, moving piston 5 upward. This turns triangular plates 1 in the reverse direction, rollers 7 slide along the horizontal slots to the right; rollers 8 slide along the vertical slots upward, raising crosspiece 2 and bolt 3.
$3859$LHP,GC$

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Documents: Hydraulic, pneumatic and electric mechanisms  [Streambook]
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