Slewing control device for construction machine
US11613872B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2017 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Feb 3, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2296
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In a state where a slewing stop operation is input, in a first state where a slewing command value is equal to or greater than an actual slewing speed, a drive unit stops outputting a torque command value, and a free-run state occurs. In the first state, a command value calculation unit decreases the slewing command value at a first inclination. Meanwhile, in the state where the slewing stop operation is input, in a second state where the slewing command value is less than the actual slewing speed, the command value calculation unit decreases the slewing command value at a second inclination that is gentler than the first inclination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.