Height-adjusting device for a gripping and transporting means for containers

A height-adjusting device for a gripping and transporting mechanism for containers having a lifting cylinder comprising:

• a cylinder base,
• a cylinder tube,
• a piston arranged sealingly slidable in the cylinder tube,
• a cylinder cover, and
• at least one first piston rod connected to the piston, wherein the first piston rod is guided out of the cylinder tube through the cylinder cover in a sealing sliding manner by its end opposite the piston,
• wherein the first piston rod is arranged in the cylinder tube and has at least one of a first and/or second fluid path configured to be pressurized by a pressurized fluid at the end of the first piston rod opposite from the piston, the first fluid path passing through the piston and communicating with a first cylinder interior at the cylinder base-side of the piston and/or, the second fluid path communicating with a second cylinder interior at the cylinder cover-side of the piston, and
• the device further comprising:
• a cylinder liner arranged coaxially with a symmetrical axis of the lifting cylinder and having a liner base on the opposite end of the piston rod from the piston, wherein the cylinder liner is open toward the cylinder base of the cylinder tube and arranged on an outer lateral surface of the cylinder tube so as to be slidably displaceable in an axial direction of the lifting cylinder, wherein the fluid paths of the piston rod are at least partly accommodated in the liner base of the cylinder liner and accessible from the outside for pressurizing with a pressurized fluid,
• a first support ring and a second support ring, both rotatable about the symmetrical axis of the lifting cylinder in parallel alignment,
• at least one gripping mechanism comprising at least one first gripper arm pair, at least one second gripper arm pair and a control cam configured to open or close the gripper arm pairs, wherein the first gripper arm pair is pivotably secured to or on the first support ring and the second gripper arm pair is pivotably secured to or on the second support ring, and wherein the gripper arm pairs are movable from a gripping position into an open position or vice versa by the control cam, and
• a cylindrical supporting sleeve having an open end face and a sleeve base which is rotationally secured to the liner base of the cylinder liner, and wherein the second support ring is secured to the open end face of the supporting sleeve.