Rod locking system with positive safety, for tensionning and locking. The locked load range is from 5kN to 3000kN for stroke up to 2 meters.
Auto-Lock is a patented locking system based on the principle of the elastic expansion of metals under a fluid pressure.
The female part of the Auto-Lock device has a bore inferior to the diameter of the rod on which it is mounted, creating a friction locking connection caused by the elastic deformation of the metals used. The unlocking is obtained by hydraulic pressure evenly applied between the two surfaces in contact.
Reverse Auto-Lock system
Reversely to the previous system, locking is obtained through application of hydraulic pressure and unlocking through lack of pressure.
Features and advantages of the Auto-Lock system
- The locking loads can reach 300 tons and hold the position with great precision during an unlimited length of time.
- The stroke is not limited and there exists an infinite variety of locking positions.
- The locking in insensitive to vibrations as well as to temperature variations.
- In case of accidental overloading, the rod will slide and the Auto-Lock will act as a brake. Provided the sliding is accidental and not repetitive, it will not bring about any damage.
Autonomous Auto-Lock system
This system makes it possible to implement locking in any direction (translation-rotation, simultaneous translation and rotation) over long strokes. It is independent from the propelling system. Mounting should be carried out at the factory by means of a special tool which has to be adapted onto the end of the rod.
Linear cylinder with Auto-Lock on rod
This system combines the advantages of a hydraulic cylinder with those of an integrated locking system. The locking capacity of the Auto-Lock system is independent from the efforts carried out by the cylinder.
Auto-Lock on piston
Whilst this system has the same characteristics as the previous one, it is also particularly adapted to aggressive environments which need a special protection of the rod.