Rotary ring spinning device provided with a ring motor

A rotary ring spinning device utilized for a ring and traveler spinning machine provided with a conventional ring rail lifting mechanism and spindle driving mechanism,

• said rotary ring spinning device comprising,
• a horizontal annular holder rigidly mounted on said ring rail,
• a horizontal annular ring body rotatably mounted on said horizontal annular holder by way of a bearing,
• a spindle arranged coaxially in an inside space of said horizontal annular rotary ring body, said spindle being driven by said driving mechanism,
• an inner motor coaxially disposed between said rotary ring body and said holder with respect said spindle at a central position of a coaxial line of said rotary ring body and holder,
• said inner motor comprising,
• an annular rotor made of a permanent magnet material and rigidly and coaxially mounted on an outside peripheral surface of said rotary ring body at a central axial position thereof,
• an annular armature rigidly and coaxially mounted on an inside peripheral surface of said holder at a central axial portion thereof, to provide a small annular space between said armature and an outside peripheral surface of said annular rotor,
• said inner motor being driven by an external electrical power source input thereto.