torsion bar

English

schematic of torsion bar, rigidly attached to gray rectangle representing, say, a vehicle frame, twisted under load from green lever arm which would in turn be attached to an axle

Noun

torsion bar (plural torsion bars)

A bar forming part of a vehicle's suspension system, that twists in response to the non-rotary motion of the wheels, absorbing vertical movement.

References

torsion bar on Wikipedia.Wikipedia
torsion bars on Wikimedia Commons.Wikimedia Commons

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