Hydraulic closing unit

Details Hydraulic closing unit Hydraulic closing unit

B - Operations, Transporting

29

C

B29C 45/67 (2006.01)

Patent

CA 2230724

A hydraulic closing unit has a ring-shaped hydraulic cylinder (26) that generates a closing force, a locking bushing (34), an assisted drive (37) for swivelling the locking bushing (34) from a first angular position to a second angular position, and a pressure bar (22) that extends through the hydraulic cylinder (26) and the locking bushing (34) in the axial direction. Outer teeth (40) on the pressure bar (22) and inner teeth (46) in the locking bushing (34) allow the pressure bar (22) to be axially pushed through the locking bushing (34) in the first angular position of the locking bushing (34), and an axial fort: to be transmitted in the second angular position of the locking bushing (34). The hydraulic cylinder (26) is designed as a double act; on. ring-shaped compression cylinder. The piston (28) of the hydraulic cylinder (26) is secured against rotation and screwed by means of a rotary thread (36) into the rotary locking bushing (34).

L'unité hydraulique de fermeture selon l'invention comprend un vérin hydraulique annulaire (26) qui génère une force de fermeture, une douille de verrouillage (34), un mécanisme d'entraînement asservi (37) qui fait tourner la douille de verrouillage (34) d'une première position angulaire à une deuxième position angulaire, et une barre de pression (22) qui traverse axialement le vérin hydraulique (26) et la douille de verrouillage (34). Une denture extérieure (40) sur la barre de pression (22) et une denture intérieure (46) dans la douille de verrouillage (34) permettent un déplacement axial de la barre de pression (22) à travers la douille de verrouillage, lorsque celle-ci est dans sa première position angulaire, et de transmettre une force axiale, lorsque la douille de verrouillage (34) est dans sa deuxième position angulaire. Le vérin hydraulique (26) est un vérin annulaire de pression à double action. Le piston (28) de ce vérin hydraulique (26) est bloqué de façon à ne pas tourner et est vissé au moyen d'un filetage rotatif (36) à la douille rotative de verrouillage (34).

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