JP2004173452A5 - - Google Patents

Claims (14)

In a rotor for an electric motor comprising a commutator attached to a shaft, an iron core having a plurality of slots, a winding wound around the slot, and a wedge inserted into the slot opening,
  A rotor for an electric motor, wherein a cover for covering a winding exposed portion is provided on the commutator side or the counter commutator side, and a varnish dropping portion for fixing the winding is formed on the cover. In a rotor for an electric motor comprising a commutator attached to a shaft and an iron core having a plurality of slots, a winding wound around the slot, and a wedge inserted into the slot opening,
The commutator-side cover that covers the commutator-side winding exposed part, has a commutator escape hole of the commutator in the center, and the wedge protrudes from a peripheral part;
An anti-commutator-side cover that covers the coil-exposed portion on the counter-commutator side, has a shaft through hole of the shaft in the center, and the wedge protrudes from a peripheral edge;
A dropping part for dropping varnish provided at an inner peripheral edge of at least one of the shaft through hole or the commutator escape hole;
A rotor for an electric motor characterized by comprising: The dropping part is formed so that the interval between the inner diameter of the commutator escape hole and the outer diameter of the commutator, or the shaft through hole and the outer diameter of the shaft can be injected into the varnish, 3. The rotor for an electric motor according to claim 2 , wherein the rotor escape hole or the varnish dropping / shaft through hole is used. 4. The rotor for an electric motor according to claim 3, wherein a varnish guide wall extending from the peripheral portion of the varnish dropping and commutating hole or the varnish dropping and shaft through-hole toward the shaft shaft end portion is formed. . 3. The rotor for an electric motor according to claim 2 , wherein the dripping portion is at least one notch provided in an inner peripheral edge portion of the shaft through hole or the commutator escape hole. 3. The rotor for an electric motor according to claim 2 , wherein the dripping portion is at least one varnish dripping hole provided in the vicinity of the inner peripheral edge of the shaft through hole or the commutator escape hole. Between the rectifier side cover and winding the exposed portion, between counter-rectification side cover and winding the exposed portion, each according to any one of claims 2 to 6, characterized in that the formation of the filling space for filling the varnish Rotor for electric motors. Provided a dropping portion in the commutator-side cover, when provided with a shaft through hole in the anti-commutator side cover, claims 2 to 7, characterized in that the formation of the varnish reservoir near the peripheral portion of the shaft through-hole The rotor for electric motors in any one of. The motor rotor according to any one of claims 2 to 8 , wherein an air vent hole is formed in at least the commutator-side cover or the non-rectifying-side cover that is not provided with the dropping portion. In a rotor for an electric motor comprising a commutator attached to a shaft, an iron core having a plurality of slots, a winding made of a copper wire wound around the slot, and a wedge inserted into the slot opening,
The commutator-side cover that covers the commutator-side winding exposed part, has a commutator escape hole of the commutator in the center, and the wedge protrudes from a peripheral part;
An anti-commutator-side cover that covers the coil-exposed portion on the counter-commutator side, has a shaft through hole of the shaft in the center, and the wedge protrudes from a peripheral edge;
A dropping portion for dropping varnish provided on each of the commutator-side cover and the counter-rectifying side cover;
A rotor for an electric motor characterized by comprising: 11. The rotor for an electric motor according to claim 10 , wherein an air vent hole is formed in each of the commutator side cover and the counter commutation side cover. The wedges of the commutator side cover and the counter commutation side cover are provided so as to correspond to every other slot, and the length is the same as the slot, and the commutator side cover and the counter commutation side cover The rotor for electric motors according to any one of claims 2 to 11 , wherein wedges are alternately inserted into the slots. The wedges of the commutator side cover and the counter commutation side cover are provided so as to correspond to each slot, and the lengths are alternately long and short. The motor rotor according to any one of claims 2 to 12 , wherein the wedges are mounted in the same slot so as to abut each other. The rotor for an electric motor according to any one of claims 2 to 13 , wherein the wedge is formed so as to be inscribed in an overhang portion of the iron core.