| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a more economical gearbox improving durability, preventing generation of meshing sound and prolonging the lifetime of grease by supplying the grease filled in the gearbox to a meshing portion between a driven bevel gear and a drive bevel gear and inhibiting wear of the bevel gears. <P>SOLUTION: In the gearbox structure of a brush cutter, on a rotary shaft 5 of a cutting edge 6 provided with the driven bevel gear 10, a rotor 13 is provided adjacent to the driven bevel gear 10, the rotor being formed around it with a spiral blade 12 rising in a direction of the driven bevel gear 10. <P>COPYRIGHT: (C)2010,JPO&INPIT |
