Sliding pulley drive mechanism in cutting platform of lawn mower
US7779617B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2009 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Jun 11, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D69/08
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A sliding pulley drive mechanism in cutting platform of lawn mower is disclosed. The drive mechanism includes an engine for the fixed to a chassis; a cutting platform connected to, and capable of moving up and down in relation to the chassis; cutting platform drive belts fitted over the output shaft of the engine, an external spline shaft is fixed to the output shaft of the engine, and a belt pulley with an internal spline is mounted on an external spline shaft. Through a spline mechanism, the belt pulley on the engine can slide up or down on the output shaft of the engine as the elevation of the cutting platform is adjusted, so that the cutting platform drive belts are kept in the same plane, and therefore the belt service lifespan is elongated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.