Orthogonal cross spring pivot
Pivot constructed from two leaf springs which are oriented perpendicular in relation to each other.
Symmetric cross spring pivot
Pivot constructed from two equal leaf springs which are symmetrically located in relation to the pole.
Double symmetric cross spring pivot
Special case of the symmetric cross spring pivot where the pole is exactly in the middle of the leaf spring.
The equivalent rolling radius of an orthogonal cross spring pivot is given by:
Buckle load (radial)
For the virtual rolling surface flips in relation to real mounting surface of the springs (see `Haberland’ cross spring)
Most often assembled from 3 plate spring elements with width , , . No pure pivot motion, but also parasitic displacement.
|ρ ⁄ L||0.236|
Ideally suited for monolithic fabrication. Relatively pure pivot behavior but with less angular stroke compared to classical double symmetric cross spring pivot.
|ρ ⁄ L *||-0.047|
|Angular stiffness||4 • Cref|
|Buckle load||2 • Fbref|
|Maximum angle||1/4 • θref|
*) Not according formula above due to coupled leaf springs
Special case classical double symmetric cross spring pivot for where and thus pure pivot behavior.
|ρ ⁄ L||0|
|Angular stiffness||2.67 • Cref|
|Maximum angle||1/3.3 • θref|