Industrial Springs

Industrial springs for roll stops – restoring force for the flap mechanism

Industrial springs provide the defined return movement of the flaps to the locked position on the roll stop of a tail lift. They store the preload with which the flaps automatically return to the locked position after each actuation. At SULEJ Ladebordwand you will find compression, tension and torsion springs in different wire thicknesses and spring rates, matched to common flap mechanism designs on the market – for reliable self-return of the safety elements on the tail lift.

Designs and materials – compression, tension and torsion springs compared

Compression springs are installed between flap and bracket and work against the flap stroke. Tension springs sit next to the flap hinge and pull the flap back into the locked position after the lever is released. Torsion springs enclose the rotary shaft and generate the restoring torque directly via the axle. Spring steel wires with corrosion protection are usually used, often in the form of phosphating or zinc coating. The exact wire thickness, winding direction and leg length depends on the respective flap design.

What to consider when selecting

Decisive factors are the correct spring constant, the free length in the relaxed state and the winding direction. A spring that is too weak prevents the flap from reliably returning to the locked position – one that is too strong noticeably increases the operating forces on the lever. Before replacement, a visual check for traces of corrosion, settling and broken end legs is worthwhile. The contact points on the bracket and flap should be free of burrs so that the spring works without friction points.

Benefits at a glance

• Defined restoring force for self-acting closure of the flap mechanism
• Compression, tension and torsion versions for different designs
• Corrosion-protected spring steel wires for long service life
• Spring rates matched to common flap geometries on the market

A correctly dimensioned spring keeps the safety effect of the flap mechanism permanently operational and reduces unwanted flap positions during driving.