Toggle clamping device or piston cylinder unit
AssigneeTunkers Maschinenbau GmbH
InventorJosef-Gerhard Tünkers
Life of this patent
Estimating the term…
Abstract
A toggle clamping device or piston-cylinder unit including mechanism for adjusting the opening angle of the clamping arm. Within the cylinder there are a number of interrogator devices that function to determine the position of pistons within the cylinder and transmit this information to a micro processor. The location of the interrogator devices can be adjusted. Also within the cylinder there are damping mechanism, the location of which can also be adjusted. When the toggle clamping device is in use, the opening angle of the clamping arm, the final-position of the interrogator devices and the final-position of the damping mechanism can be adjusted and locked simultaneously and jointly through a single adjusting element from the outside of the device without dismantling the toggle clamping device.
Claims30
A toggle clamping device for automobile body fabrication comprising:
- a grip holder (1) and a cylinder (2) having a front end (3) and a bottom (4), said cylinder being attached at its front end to said grip holder in axial extension;
- a piston (5) guided in a longitudinally displaceable, torsion-proof and sealing manner in said cylinder, said piston to be acted upon alternately on both sides by a pressure-medium;
- said piston (5) includes a piston rod (7) having a free end, said piston and piston rod extends through said cylinder (2) and said piston rod further extends through said grip holder (1);
- said grip holder (1) includes a housing in which a toggle joint arrangement (10) is located;
- a clamping arm (96) operatively connected to said toggle joint arrangement;
- said piston (5) subdividing said cylinder (2) into a cylinder return stroke chamber (34) and a cylinder clamping stroke chamber (30), said cylinder return stroke chamber (34) being closed in a sealing manner at the front end of the cylinder by a cover or housing wall (3);
- a brake piston (13) in said cylinder (2) that cooperates with said piston (5) and in coaxial relation thereto;
- a damping device (25,35) within said cylinder (2) for braking the opening movement of said piston (5);
- remote position interrogator devices within said cylinder (2), for said piston (5) and said brake piston (13), in the form of non-contact inductive sensors (43, 44, 46, 53, 54, 60, 64, 66);
- an adjusting device (14) arranged in the bottom (4) of said cylinder (5) for said brake piston (13), said adjusting device (14) being infinitely axially adjustable and lockable in both directions, without dismantling said toggle joint arrangement and clamping arm (96), from the outside of said cylinder bottom (4) to simultaneously vary and adjust the opening angle of the clamping arm (96) and some of said final position interrogator devices.
Dependencies are inferred from the claim text.