B - Operations – Transporting – 60 – K
Patent
B - Operations, Transporting
60
K
B60K 11/06 (2006.01) B60K 7/00 (2006.01) B62K 11/00 (2006.01)
Patent
CA 2520684
A hub unit for use in electrically assisted bicycles is improved in an effect to cool a motor incorporated in the unit. The hub unit has a motor 9 comprising a stator 3 and a rotor 4, and a hub 7 enclosing the motor 9 therein and rotatingly drivable by the rotation of the rotor 4. The unit has a pump 8 for discharging air from inside the hub 7 with the rotation of the hub 7. The air is discharged from inside the hub 7 by the operation of the pump 8 , whereby air is admitted into the hub 7 from outside through an air port 59 formed in the hub 7 and is supplied to the motor 9 to cool the motor 9 and reliably prevent the motor from overheating.
Adachi Ryohei
Tomoshige Kazuhiro
Riches Mckenzie & Herbert Llp
Sanyo Electric Co. Ltd.
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