Life evaluating device and robot system
US11578834B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2018 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Dec 26, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16N2260/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Provided is a life evaluating device that evaluates the life of a lubricant in a machine including a motor and a transmission mechanism that is lubricated by the lubricant and transmits power of the motor to a movable unit. The life evaluating device includes a motor-heat-value calculating unit that calculates a motor heat value on the basis of a current value of the motor, a frictional-heat-value calculating unit that calculates a frictional heat value in the transmission mechanism on the basis of rotating speed of the motor and a coefficient of friction of the transmission mechanism, a lubricant-temperature estimating unit that estimates temperature of the lubricant on the basis of the calculated frictional heat value and the calculated motor heat value, and a life estimating unit that estimates the life of the lubricant on the basis of the estimated temperature of the lubricant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.