Hub unit for use in electrically movable wheels and vehicle comprising the hub unit
AssigneeSanyo Electric Co., Ltd.
InventorsKazuhiro Tomoshige, Ryohei Adachi
Life of this patent
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Abstract
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.
Claims7
A hub unit for use in electrically movable wheels which has a motor comprising a stator and a rotor, and a hub enclosing the motor therein and to be rotatingly driven by the rotation of the rotor,
- the hub unit being characterized in that the hub unit is provided with means for cooling the motor by admitting outside air into the hub with the rotation of the hub.
Dependencies are inferred from the claim text.