Slip ring device and rotary electric machine using the same
View Patent ↗A first slip ring and a second slip ring are put from both ends of a slip ring shaft, respectively, and are attached by shrink-fitting, the slip ring shaft being provided separately from a rotor shaft; the shaft diameter of a lead connecting portion is formed larger than the shaft diameters of respective slip ring attaching portions; and a coupling, which is attached by shrink-fitting to a shaft end portion on the rotor shaft side of the slip ring shaft after the first slip ring is attached by shrink-fitting, is provided.
1. A slip ring device comprising:
a slip ring shaft provided separately from a rotor shaft;
a first slip ring and a second slip ring, both of which being put from both ends of said slip ring shaft, respectively, said first slip ring being attached by shrink-fitting to a first slip ring attaching portion of said slip ring shaft, and said second slip ring being attached by shrink-fitting to a second slip ring attaching portion of said slip ring shaft;
a lead connecting portion which is located between the first slip ring attaching portion and the second slip ring attaching portion in said slip ring shaft and is formed to be a shaft diameter larger than the shaft diameters of the first slip ring attaching portion and the second slip ring attaching portion of said slip ring shaft;
a first radial lead and a second radial lead, said first radial lead being placed in a first radial lead placing hole and said second radial lead being placed in a second radial lead placing hole, said radial lead placing holes being formed in the lead connecting portion;
a first axial lead and a second axial lead, both of which being placed in a hollow hole formed in a central portion of said slip ring shaft, said first axial lead being connected to said first radial lead and said second axial lead being connected to said second radial lead;
a first slip ring lead which is connected to said first slip ring and to said first radial lead;
a second slip ring lead which is connected to said second slip ring and to said second radial lead; and
a coupling which is attached by shrink-fitting to a shaft end portion on the rotor shaft side of said slip ring shaft after said first slip ring is attached by shrink-fitting.
2. The slip ring device according to claim 1 ,
wherein each of said first slip ring lead and said second slip ring lead passes through a corresponding lead groove formed in the lead connecting portion and is fixed by a corresponding wedge attached by insertion in a corresponding wedge groove formed in the lead groove portion.
3. The slip ring device according to claim 1 ,
wherein said slip ring shaft is made of material having higher strength than material of said rotor shaft.
4. A rotary electric machine using the slip ring device as set forth in claim 1 .
5. The slip ring device according to claim 2 ,
wherein said slip ring shaft is made of material having higher strength than material of said rotor shaft.
6. A rotary electric machine using the slip ring device as set forth in claim 2 .
7. A rotary electric machine using the slip ring device as set forth in claim 3 .
8. A rotary electric machine using the slip ring device as set forth in claim 5 .