Patent ID: 7516553
Filing Date: 2009-04-14
Classification: B23D,B23Q,B27B

Abstract:
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.