suspension bellcrank bearings
suspension bellcrank bearings
(OP)
In a pushrod suspension, compressing the spring and damper via a bellcrank, much attention is placed on the bearings used in the bellcrank. In formula cars these bellcranks are in single shear and attach to the tub via a stiff post embedded into the tub.
With a different application, i.e. using a bellcrank in a spaceframe chassis the bellcrank can be mounted in double shear. What bearings could be used for this when weight is of slightly lesser importance.
I was wondering if two sherical bearings running on the same shaft, spaced 10mm apart would do the job...or two cone and cup needle roller bearings would also be suitable?
With a different application, i.e. using a bellcrank in a spaceframe chassis the bellcrank can be mounted in double shear. What bearings could be used for this when weight is of slightly lesser importance.
I was wondering if two sherical bearings running on the same shaft, spaced 10mm apart would do the job...or two cone and cup needle roller bearings would also be suitable?





RE: suspension bellcrank bearings
Anything can be used. However, things such as load, longevity, stiction, etc., all have thier own requirements. In addition, leverage and total movement are just as important as the weight of the car.
If things are well aligned and rotate upon a common plane, a single-row ball bearing will do fine. If there are angles or side loads, a double row or spaced pair of bearings would be best. Swivel rod ends will work but life span will be limited and in some situations, stiction can be high. High stiction, will cause higher than calculated loads to be present in other places.
RE: suspension bellcrank bearings
RE: suspension bellcrank bearings
RE: suspension bellcrank bearings
I think you just described the so called rubber torsion bar type of suspension commonly used on light duty trailers.
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RE: suspension bellcrank bearings
RE: suspension bellcrank bearings
RE: suspension bellcrank bearings
I am not a suspension guy, so I did not respond, presuming I was in over my head.
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eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: suspension bellcrank bearings