Patent ID: 9234528
Filing Date: 2016-01-12
CPC Classification: F04D,H02K

Claim Text:
1. A motor base comprising: a bottom plate having opposite top and bottom surfaces, wherein a shaft-coupling portion is arranged on the top surface; and at least one vibration reduction unit enclosing the shaft-coupling portion, wherein each of the at least one vibration reduction unit comprises at least one protrusion and at least one groove, wherein the at least one protrusion is arranged on one of the top and bottom surfaces, wherein the at least one groove is correspondingly arranged on another one of the top and bottom surfaces, wherein the at least one protrusion comprises a single protrusion arranged on the top surface, wherein the at least one groove comprises a single groove correspondingly arranged on the bottom surface, wherein the bottom plate further comprises an inner end portion and an outer end portion opposite to the inner end portion, wherein the inner end portion is coupled with the shaft-coupling portion, wherein the outer end portion extends outwards in a horizontal direction of the bottom plate, wherein the top surface comprises a first top surface, a second top surface and a third top surface, wherein the first top surface is positioned between the protrusion and the inner end portion, wherein the second top surface is positioned on the protrusion, wherein the third top surface is positioned between the protrusion and the outer end portion, wherein the first and third top surfaces are aligned with each other in a radial direction of the shaft-coupling portion, and wherein the second top surface is not aligned with the first and third top surfaces in the radial direction of the shaft-coupling portion.