| 摘要 |
PURPOSE:To easily mount a sprocket to a boss end part even if a dimension between bearing members is slightly different for the lenth of a feed rotor, by providing a distance between the base end of a boss in the outside of the feed rotor and the internal face of the sprocket mounted to the boss end part. CONSTITUTION:Side plates 3 are mounted to both side end parts of blades 2 of a feed rotor 1 having the blades 2 in the periphery and each cylindrical boss 4 is protrusively provided to the outsides of said plates 3 then a driving sprocket 7 is mounted to the end part of one of the bosses. A distance 10, which enables the sliding of a bearing face 6a of a bearing member 6 in the direction of thrust, is provided between a base end 4a of the boss and an internal face 7a of the sprocket, and the bosses 4 are rotatable supported to the bearing faces 6a. That is, an error of dimensions between the members 6, 6, even if slightly different, can be abosrbed by said distance 10, and the sprocket 7 can be easily mounted to the boss end part not to be adapted to the member 6 further the rotor 1 can be supported not to be adapted to the members 6, thus the rotor 1 can be stably rotated. |
