Hub motor

A hub motor adapted to be mounted on a bicycle, the hub motor comprising:

• an axle, fixed to a frame of the bicycle and having a first end and a second end opposite each other in an extension direction;
• a rotor, sleeved on the axle and pivoting with the axle as an axis;
• a stator, fixed to the axle and adjacent to the rotor;
• and
• a casing, sleeved on the axle and driven by the rotor to pivot with the axle as an axis, wherein the casing has an accommodating space, a first perforation, and a second perforation opposite to the first perforation, and the accommodating space accommodates the stator and the rotor;
• wherein the axle comprises a first component and a second component in the extension direction, the first component is sleeved on the second component, the first component is arranged to pass through the first perforation and comprises a first mounting portion and a second mounting portion located in the accommodating space, the first mounting portion is fixedly connected to the stator, the second mounting portion is connected to the second component, the second component is arranged to pass through the second perforation and comprises a supporting portion and a connecting portion located in the accommodating space, the rotor is rotatably sleeved on the supporting portion, the second mounting portion is detachably sleeved on the connecting portion, and the first component and the second component cannot rotate relative to each other after being sleeved,
• wherein the first component comprises a mounting section and a sleeve section in the extension direction, the mounting section is close to the first end and is adapted to be connected to the frame, the casing is rotatably sleeved on the sleeve section, the first mounting portion is arranged on a radial-outer side of the sleeve section, and the second mounting portion is arranged on a radial-inner side of the sleeve section, the sleeve section comprises a disc body and a supporting ring, the disc body extends in a radial direction of the axle, the supporting ring surrounds the disc body, and the stator is sleeved on the supporting ring.