Patent ID: 11958567
Assignee: MOBILETRON ELECTRONICS CO., LTD
Field: Transport (Mechanical engineering)
Classification: CPC B  G  H | IPC B  G  H

Claim 5:
6. The coaxial mid-drive power device as claimed in claim 5, wherein
the front cover is an annular body;
a right spacer ring and a right bearing respectively fit in a left side and a right side of an inner peripheral surface of the front cover;
the right spacer ring is disposed between an outer peripheral surface of the sleeve and the inner peripheral surface of the front cover;
at least a portion of an outer peripheral surface of the second tube section fits in an inner peripheral surface of the right bearing for engaging, and another portion of the second tube section extends rightward out of a surrounding range of the front cover;
a protruding ring portion is formed by protruding outward from the another portion of the second tube section that extends out of the front cover;
the sprocket base is a hat-shaped disc body and is engaged with the protruding ring portion through an inner peripheral edge of the sprocket base by screwing.