Overload coupling for protecting drive trains especially on agricultural machines
US4802326A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1987 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Oct 14, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D43/2028
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An overload coupling for the protection of drive trains on machines, particularly agricultural machines powered by a tractor, protects against overloading in at least one rotational direction. A coupling sleeve is mounted for rotation around a coupling hub of the overload coupling. Relative rotation between the hub and sleeve is about a coupling axis. A plurality of circumferentially spaced recesses are provided in the coupling hub which each contain a rotatably mounted rotor. The rotors are mounted about their own rotor axes which are parallel to but spaced apart from the coupling axis. Each rotor contains a radially movable driver cam which is spring-loaded and has cam surfaces for engaging detent grooves in the sleeve. With the driver cams engaged in the detent grooves, relative rotation between the hub and sleeve is resisted. By shaping the cam surfaces and adjacent abutment surfaces of the driver cams, the direction and force of disengagement can be set between the coupling hub and coupling sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.