| CPC B62M 6/65 (2013.01) [H02K 1/27 (2013.01); H02K 7/003 (2013.01); H02K 7/006 (2013.01)] | 11 Claims |
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1. A hub motor for a pedelec, which is used in a quick-release shaft, comprising:
a hub housing;
a shaft module comprising a shaft tube and a casing tube that fits around the shaft tube, wherein the shaft tube is hollow and passes through the hub housing in an axial direction of the hub motor; the shaft tube forms a perforation that is adapted to be inserted by the quick-release shaft; the shaft tube comprises an inner circumference, an outer circumference, and a groove, wherein the inner circumference encircles to form the perforation, and the outer circumference is opposite to the inner circumference; the groove is formed by recessing into the outer circumference in a direction from the outer circumference into the inner circumference and extends along the axial direction; the casing tube fits around the shaft tube to cover the groove to form a wiring space;
a stator unit comprising a stator bracket, a plurality of stators, and a control circuit board, wherein the stator bracket is fixed to and surround the shaft tube, and the plurality of stators is disposed on the stator bracket and is arranged to surround the shaft tube; the control circuit board is disposed on the stator bracket and is electrically connected to the stators;
a rotor unit rotatably disposed around the stator unit and the shaft tube and comprising a rotor bracket and a plurality of rotors, wherein the rotor bracket rotatably fits around the shaft tube, and the rotors are disposed in the rotor bracket and surround the stators;
a reduction gear set located in the hub housing and spaced apart from the stator unit and the rotor unit in the axial direction, wherein the reduction gear set surrounds the wiring space; the reduction gear set is driven by the rotor unit to drive the hub housing to rotate relative to the shaft module;
a freehub module spaced from the stator unit, the rotor unit, and the reduction gear set in the axial direction and pivotally connected to the hub housing; the freehub module comprises a freehub body and an output portion, wherein the freehub body is adapted to restrict a rotational direction of the hub housing to a single direction and to sense a rotational speed of the hub housing; the output portion is electrically connected to the freehub body for outputting the rotational speed of the hub housing, wherein the output portion is adjacent to the groove; and
a signal wire passing through and restricted in the wiring space, wherein the signal wire is spaced apart from the reduction gear set; an end of the signal wire is electrically connected to the output portion of the freehub module, and another end of the signal wire is electrically connected to the control circuit board.
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