Sanyo Electric Co., Ltd.

Sanyo Consumer Electronics Co., Ltd.

Ryohei Adachi

Kazuhiro Tomoshige

Tatsuaki Tanaka

In a motor, a motor case includes a first case and a second case separable from each other in a direction of an axis of a rotation shaft of a rotor. The first case and the second case each have cut-away portions extending parallel to the axis from a separation edge (open side edge) thereof. The separation edges of the first and second cases each have abutment portions not formed with the cut-away portions, and the abutment portions of the first case respectively abut against the abutment portions of the second case. The cut-away portions cooperatively define a plurality of windows disposed in a periphery of the motor case. The stator has a plurality of bulges projecting radially outward from a peripheral surface thereof in association with the windows.

Direct-current motor and hub unit

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 motorcomprising a statorand a rotor, and a hubenclosing the motortherein and rotatingly drivable by the rotation of the rotor. The unit has a pumpfor discharging air from inside the hubwith the rotation of the hub. The air is discharged from inside the hubby the operation of the pump, whereby air is admitted into the hubfrom outside through an air portformed in the huband is supplied to the motorto cool the motorand reliably prevent the motor from overheating.

Hub unit for use in electrically movable wheels and vehicle comprising the hub unit

A hub unit for use in electrically assisted bicycles has an improved effect to radiate heat from a stator. A hub () has inner teeth () meshable with planetary gears () and a fixing support shaft () projecting from opposite ends of the hub and provided fixedly relative to a motor housing (). The motor housing () has no cylindrical wall () covering the outer peripheral surface of the stator () but leaves the stator outer peripheral surface exposed to effectively release the heat generated by the windings of the stator.

Growing community of inventors

Hyogo, Japan

Ryohei Adachi