| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a brushcutter capable of securing enough rigidity of a clutch housing and effectively cooling a centrifugal clutch without complicating structure of a cooling fan. <P>SOLUTION: A brushcutter includes: a centrifugal clutch 20 that transmits a drive force of an engine from a crankshaft to a drive shaft; a clutch housing 23 made of a synthetic resin for covering a cooling fan and the centrifugal clutch; and a bearing that is held inside the clutch housing 23 and supports a coupling shaft that couples the drive shaft and the centrifugal clutch 20. A volute-shaped air-flow space 27 defined by including a rise wall 26 surrounding the centrifugal clutch 20 is provided in an outer circumference of the centrifugal clutch 20 inside the clutch housing 23. Inflow openings 28, 29 that let cooling air flowing in the air-flow space 27 flow into an inner air-flow space 53 and an outflow opening 52 that lets the cooling air flowing in the air-flow space 53 flow out to the air-flow space 27 are provided on the rise wall 26. <P>COPYRIGHT: (C)2012,JPO&INPIT |
