| 摘要 |
<p>An elongate gearbox housing (100) comprising an assembly of intermeshing gear wheels (2a, 2b) spaced apart in a horizontal plane along its length, wherein each gear wheel is adapted to apply driving rotation to a rotary mower disc (200) and comprises a main annular body (12) supported by a plurality of bearings and a plurality of gear teeth (13a, 13b) extending outwardly from the annular body, wherein the outer edge profile of one or more of the gear teeth has a peripheral portion (14a, 14b) of maximum radial extent from the annular body and at least one chamfered portion (15a, 16a; 15b, 16b) of lesser radial extent, to give meshing engagement with another gear wheel with reduced noise generation.</p> |
