Rail fastening system spring fastener working principle

When the spring fastener is installed, the bolt is tightened by the nut and the elastic strip is compressed to make it deformable.
After the elastic bar is deformed, its front two limbs will act on the gauge stop, and the gauge stop will then clamp the rail, so as to achieve a reliable connection between the rail and the sleeper.

During the movement of the train, the rail will be subjected to the impact force and vibration from the wheels.
When the rail moves down relative to the sleeper, the rubber pad under the rail will be compressed, at this time the spring bar is in a relaxed state, and the buckle pressure is reduced to adapt to the downward displacement of the rail.
When the rail moves upward relative to the sleeper, the spring bar is in a compressed state and the buckle pressure increases to resist the upward displacement of the rail.

The special elastic structure of the elastic bar makes it have the ability to absorb the impact energy generated when the vehicle passes, so as to achieve the role of shock absorption.
This damping and cushioning effect helps protect the track from damage, improving the smoothness and safety of the train.