Semi-rigid axis
Three types of automobile wheel suspensions are grouped under the name semi-rigid axle . What they have in common is a rigid , but torsionally flexible beam with an open profile, usually in a U-shape, which connects both sides of the wheel suspension and also acts as a stabilizer . They are only used on non-driven rear wheels.
A distinction is made between the following three variants:
- Torsion crank axle : the crossbeam is located at the ends of two trailing arms between the wheels like a rigid axle . The trailing arms are torsion and transversely flexible flat profile bars; The axis is guided laterally with a Panhard rod .
- Coupling link axle: the cross beam is located about a third of the length from the pivot bearing on the trailing arms, which are designed as rigid tubular profiles.
- Twist beam axle : the crossbeam is located near the pivot bearing of the trailing arm.
Advantageous features of twist beam axles are:
- inexpensive,
- little space required
- flat structure,
- easy assembly and disassembly of the axle,
- certain predetermined stabilizer effect by the cross member,
- little change in track width.
Disadvantage:
- Stress peaks at the transition points from torsional stiffeners to flexible components,
- Oversteer tendency under lateral force
- unfavorable lateral force support (poor transverse rigidity),
- unsuitable as a driven axle,
- Low voting potential.
Individual evidence
- ↑ Bernd Heißig et al .: Chassis Manual. 4th edition, Springer Vieweg Verlag. 2013, ISBN 978-3658019914 , p. 433.
- ↑ Bernd Heißig et al: p. 436.