Patent ID: 7462967
Filing Date: 2008-12-09
Classification: H02K

Abstract:
1. A flat, hollow brushless motor comprising: a flattened tubular motor housing sealed at both ends, first and second housing through holes formed in a center of first and second end plate portions on both sides of the motor housing, a rotor shaft of which a portion of both ends is exposed from the first and second housing through holes, a tool-mounting hole that extends through a center of the rotor shaft and that has both ends thereof exposed from the first and second housing through holes, and first and second workpiece insertion recesses formed in outer surfaces of the first and second end plate portions of the motor housing, wherein the first and second workpiece insertion recesses are formed with a fixed depth in central areas containing the housing through holes, and in areas extending in a radially same direction to external peripheral edges of the end plate portions continuously with the central edges on the outside surfaces of the end plate portions, so that the end plate portions have a reduced thickness at the work piece insertion recesses.