| 摘要 |
PROBLEM TO BE SOLVED: To reduce the blower noise of a snow removing machine by suppressing the collision between wind and snow at the tongue-shaped portion thereby decreasing noise. SOLUTION: Main components of a blower housing 60 comprise a cylindrical portion 61 housing an impeller 32, a discharge section 62 extended from the cylindrical portion 61 along the tangent line, and a slope-shaped swelled groove 64 decreasing its swelling allowance D along the rotation (arrow mark 1) of the impeller 32 while the discharge section 62 is swelled outwardly at the cylindrical portion 61 side at the tongue-shaped portion 63 intersecting with the cylindrical portion 61. Thus, when the impeller 32 is rotated in an arrow direction 1, wind and snow with a centrifugal force given by the impeller 32 are sent to the tongue-shaped portion. Since the tongue-shaped portion 63 has a slope-shaped swelled groove 64, the wind and snow smoothly move to the cylindrical portion 61 along he swelled groove as shown by the arrow 2. Thus, at the tongue-shaped portion 63, the collision seen conventionally hardly occur any more and the collision is very minor even though it occurs.
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