Magnetic reducer

A magnetic reducer comprising:

• a housing rotatably supporting the magnetic reducer;
• an input shaft assembly fixedly coupled to a rotary shaft of a motor that is inserted through an input hole of the housing;
• an inner magnetic flux assembly including an inner core supported on an outer circumferential surface of the input shaft assembly and inner magnets coupled to an outer circumferential surface of the inner core;
• an outer magnetic flux assembly including an outer core supported on an inner circumferential surface of the housing and outer magnets coupled to an inner circumferential surface of the outer core;
• a pole piece unit including a pole piece holder and pole piece covers,
• the pole piece holder being supported on an inner surface of the housing, being positioned between the outer circumferential surface of the inner magnetic flux assembly and the inner circumferential surface of the outer magnetic flux assembly, and including
• a central ring coaxial with the inner magnetic flux assembly,
• protrusions arranged at regular intervals on an outer circumferential surface of the central ring, and
• pole piece holes axially passing through the protrusions, and
• the pole piece covers having irregularities engaged with side surfaces of the protrusions and fixedly coupled to the pole piece holder by pole piece pins penetrating through the pole piece holes;
• and
• an output shaft assembly detachably coupled to the outer magnetic flux assembly.