Six axis load cell
US5315882A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1992 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Mar 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L5/1627
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A structural assembly that measures forces along and moments about three orthogonal axes with very low cross talk or likelihood of affecting the reading in one axis from loads in another axis is disclosed. The assembly comprises a support structure having a longitudinal axis that is positioned on an axis of the plurality of orthogonal axes. The support structure is substantially compliant for moments about the longitudinal axis and substantially rigid for forces along the orthogonal axes and for moments about the non-longitudinal orthogonal axes. Structural elements of the support structure are joined together with elliptical fillets to minimize stress concentration within the structure. A torque cell that measures moments about the longitudinal axis is positioned concentrically about the longitudinal axis either within a cavity located in the support structure or cylindrically around the support structure. An upper and lower flexure diaphragm connect adjacent ends of the support structure and the torque cell. The flexure diaphragms are substantially rigid to transmit moments about the longitudinal axis from the support structure to the torque cell and substantially compliant for a…
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