Screw jacks are transmission products (feed screws, ball
screws or roller screws) that make rotary motion using gearbox
assemblies (helical gears or bevel gears) and motors. They can be used to push,
pull, tension, unlock, tilt, rotate, pull, raise or lower loads ranging from a
few kilos to several thousand tons.
Screw jacks are an integral part of automation machines.
Issues related to safety and legislation drive the handling of heavy loads and
lift automation, particularly in areas where labor and health and safety
legislation have been developed.
Trends in electro-mechanical operation due to hydraulic
operation.
Screw jacks generally work in high load applications.
Competitive technologies at high loads tend to be hydraulic devices. However,
the hydraulic system is more energy efficient than the electro-mechanical
operation provided by the screw jack. Hydraulic systems waste energy as the
fluid circulates at a constant pressure, regardless of the amount of work that
must be done with the hydraulic positioning. Hydraulic jacks or jacks require
constant pressure to maintain their position while securing the bar in
position. In contrast, the electric motor used to feed the screw jacks only
uses energy to drive the load to the required position.
The advantages of electro-mechanical machines over hydraulic
pressure can be summarized as follows.
· Higher safety requirements, automatic locking of screw jacks during power outages
· Demand for machinery that works with greater energy efficiency.
· Demand for machinery that requires higher levels of precision.
· Low maintenance machinery
· Machines that require less manual work to configure processes
· Greater operating range of variable positioning
· Precise and smooth power transmission
· Cleaning machine
