Electric cutting or drilling tools that use battery packs as power sources

摘要

An electric tool may include a tool main body configured to be able to mount a battery pack. The tool main body may include an electric motor, a controller for controlling the electric motor, and a centrifugal fan rotatably driven by the electric motor for producing a flow of air. The controller may be positioned such that the flow of air produced by the centrifugal fan is applied to at least a part of the controller.

主权项

1. An electric tool comprising:
a tool main body configured to be able to mount a battery pack, the tool main body including: an electric motor configured to rotate with a supply of an electric power from the battery pack; a centrifugal fan rotatably driven by the electric motor for producing a flow of air; a controller configured to control the electric motor with respect to a rotational drive of the electric motor; and a cutting blade rotatably driven by the electric motor, the cutting blade extending parallel to the radial direction of the centrifugal fan, wherein the controller is disposed within the tool main body such that at least a part of a surface of the controller is positioned on a radially outer side of the centrifugal fan, wherein the surface of the controller includes a longer side surface and a shorter side surface, the longer side surface is positioned on a radially outer side of the centrifugal fan, and the longer side surface ends in a vertical direction in parallel to a rotational axis of the centrifugal fan, wherein the longer side surface includes two opposite longer side surfaces and the shorter side surface includes four or more shorter side surfaces connecting between the opposite longer side surfaces, and one of the opposite longer side surfaces directly opposes the centrifugal fan on the radially outer side, and wherein the at least a part of the controller is positioned on a rear side of the centrifugal fan with respect to a machining proceeding direction so as to directly oppose the centrifugal fan on the radially outer side.