Direct motor-drive portable angle grinder
OwnerTai-Her Yanginventor
Life of this patent
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Abstract
The present invention is an original direct motor-drive portable angle grinder with a disc type motor installed in a position adjacent to the grinding wheel and an outer motor rotating part coaxially and directly driving the grinding wheel. By means of the direct drive, the present invention prevents the emission of noise made by angle type transmission devices. Moreover, an inertial body is installed on the rotating housing that is integrated with the rotating part to form a flywheel or the rotating housing and the inertial body are integrated into a single reinforced structure to enable a flywheel function in order to improve the grinding, polishing and machining or cutting abilities of the grinding wheel.
Claims15
A direct motor-driven angle grinder, comprising:
- a drive motor having an inner housing part, a rotating outer housing part that encloses a rotating part of the motor and surrounds the inner housing part, and a spindle connected to the rotating outer housing part;
- a handle fixed to an extending from the inner housing part, wherein an angle between an axis of the handle and an axis of the housing is between 30° and 150°;
- and
- a grinding wheel or a circular saw fixed to the spindle so as to rotate with the rotating outer housing and be directly driven by the drive motor,
- wherein the rotating outer housing part of the drive motor serves as a flywheel during operation of the motor to rotate the grinding wheel or circular saw.
Dependencies are inferred from the claim text.