초록 ▼

A machine for floor maintenance comprising an electric motor in which armature coils are included in a stator and pemanent magnets are included in a rotor. The armature coils are disposed substantially radial to the axis of the stator with the axial extent of each coil lesser than the radial extent

A machine for floor maintenance comprising an electric motor in which armature coils are included in a stator and pemanent magnets are included in a rotor. The armature coils are disposed substantially radial to the axis of the stator with the axial extent of each coil lesser than the radial extent of each coil, and the permanent magnets of the rotor are disposed substantially radially to the axis of rotation of the rotor with the axial extent of each permanent magnet lesser than the radial extent of each permanent magnet. A three phase switching circuit excites the armature coils to impart rotation to the rotor. As a consequence thereof, the motor has a configuration conforming substantially to the pad or brush of the machine. The pad is attached to the rotor by a pad holder which is formed with a convex surface for engaging the pad. By virtue of this arrangement, increased from the weight of the machine is applied to the area surrounding the axial opening of the pad with a lesser amount of force from the weight of the machine applied to the circumferential area of the pad.

대표청구항 ▼

A floor machine comprising: (a) a body; (b) a stator housing supported by said body; (c) a shaft disposed in said stator housing with the axis thereof coincident with the axis of said stator housing; (d) armature winding supported by said stator housing concentric therewith, said armature winding in

A floor machine comprising: (a) a body; (b) a stator housing supported by said body; (c) a shaft disposed in said stator housing with the axis thereof coincident with the axis of said stator housing; (d) armature winding supported by said stator housing concentric therewith, said armature winding including an array of radially disposed coils with the axial extent of said coils less than the radial extent of said coils taken respectively; (e) a rotor housing journalled for rotation relative to said stator and having an axis coincident with the axis of said shaft; (f) an array of radially disposed permanent magnets supported by said rotor housing concentric therewith for concurrent movement, said permanent magnets having alternate magnetic fields in succession with the axial extent of said permanent magnets less than the radial extent of said permanent magnets taken respectively; (g) a plurality of sensors in said stator housing disposed concentrically with said armature winding and responsive to said permanent magnets; and (h) a switching circuit responsive to said sensors and connected to said armature winding for exciting said armature winding to impart rotation to said rotor housing; (i) said rotor comprising means adaptable for supporting floor maintenance means.