| 摘要 |
Apparatus for exerting force in lateral directions with respect to a longitudinal axis, the apparatus being particularly adapted for use in straightening deformed rolls of sheet stock. A fluid power cylinder is provided having a piston rod coaxial with the axis and being movable between retracted and extended positions. A pair of elongated, transversely spaced, parallel frame members is provided having rear ends secured to opposite sides of the cylinder and extending longitudinally forwardly on opposite sides of the piston rod. A pair of force-exerting shoes is provided respectively on opposite sides of the frame members and movable laterally outwardly away from and inwardly toward the frame members. A first pair of links is provided having inner ends respectively pivotally connected to the outer end of the piston rod and outer ends respectively pivotally connected to the shoes. A second pair of links is provided respectively having outer ends pivotally connected to the first links intermediate their ends and inner ends respectively pivotally connected to the frame members longitudinally forwardly of the outer end of the piston rod when the same is in its extended position. The first and second pairs of links form a toggle, movement of the piston rod toward its extended position causing the toggle simultaneously to move the shoes laterally outwardly in opposite directions away from the frame members, and movement of the piston rod toward its retracted position causing the toggle simultaneously to move the shoes laterally inwardly toward the frame members.
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