Question about suspension linking.

[NOS_ATX]

(http://d.pr/PQii)
This is a rear suspension system of a F1 car
In red circles we may find that the arms are linked to the body by ball joints.
(http://d.pr/bVmL)
Why the Teams use ball joints instead of normal cylinder joints？

Also in this picture, I can't explain how the arm rotate because there is no any joint between the arm and body.
(http://d.pr/a4rZ)
Anyone can help me? Thanks!

[Caito]

The "cylinder joints" you're referring to I think are rubber bushings.

Rubber bushings have too much compliance for an F1 car so they use spherical bearings.



These allow for a spherical movement without compliance.


The ones in the last pictures are flexures bearings. They work by bending a load element(wikipedia).
http://en.wikipedia.org/wiki/Flexure_bearing


You can find lots of information in the forum using the search function.


BTW, welcome to the forum, you can leave some greetings in the new user thread.

Caito.-