Portable electric cutting device with blower mechanism
A portable electric cutting device includes housing, a saw blade, a saw cover, a base linked to the housing, and a centrifugal fan. The saw cover has a partition wall formed with a plurality of division walls including front and rear divisional walls. The plurality of division walls have an inclined part that extends at an angle with respect to a radial direction of the rotary axis of the fan such that a radially outer part of the inclined part locates upstream from a radially inner part of the inclined part with respect to the rotary direction of the fan.
1. A portable electric cutting device comprising:
a housing accommodating a motor;
a saw blade driven to rotate by the motor and capable of cutting an object in a cutting direction;
a saw cover attached to the housing and including a saw blade housing section that has a shape capable of covering an upper peripheral portion of the saw blade and partially houses the saw blade;
a base linked to the housing and having a bottom surface that slides on the object, the base being formed with an opening through which the saw blade projects downward beyond the bottom surface; and
a centrifugal fan driven to rotate about a rotary axis in a rotary direction by the motor for generating fanned air to cool the motor;
wherein the saw cover has a partition wall disposed between the centrifugal fan and the saw blade housing section, the partition wall being formed with a plurality of division walls defining a plurality of discharge ports through which the fanned air is discharged into the saw blade housing section; and
wherein the plurality of division walls include front division walls and rear divisional walls, the front division walls being located at a front side of the rotary axis of the fan with respect to the cutting direction, the rear division walls being located at a rear side of the rotary axis of the fan with respect to the cutting direction, the plurality of division walls having an inclined part that extends at an angle with respect to a radial direction of the rotary axis of the fan such that a radially outer part of the inclined part locates upstream from a radially inner part of the inclined part with respect to the rotary direction of the fan.
2. The portable electric cutting device according to claim 1 , wherein all of the plurality of division walls have the inclined part, respectively.
3. The portable electric cutting device according to claim 1 , wherein the angle is a prescribed angle θ.
4. The portable electric cutting device according to claim 1 , wherein the plurality of division walls are arranged at regular intervals.
5. The portable electric cutting device according to claim 3 , wherein the base has a front end with respect to the cutting direction, and wherein the bottom surface is formed with a groove in fluid communication with the opening and opened to the front end of the base.