Rotation drive apparatus for construction machine
US10156060B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2015 |
| Grant date | Dec 18, 2018 |
| Priority date | — |
| Expiry date | Jul 30, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/268
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rotation drive apparatus for rotating an upper rotary body of a construction machine, the rotation drive apparatus eliminating, while achieving a fundamental goal of stopping a rotation when an emergency stop operation is performed, wasteful stopping by a parking brake. The apparatus includes: an emergency stop switch; a rotation control section which performs control to stop a rotating motor when the emergency stop operation is applied to the emergency stop switch; and a timer which activates the parking brake when a set period of time has elapsed after the emergency stop operation is performed. Preferably, the rotation control section detects a failure of an inverter and causes the parking brake to perform a braking operation before the elapse of the set period of time when the failure is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.