ROTOR ASSEMBLY AND BRUSHLESS DC MOTOR COMPRISING THE SAME

摘要

A rotor assembly, including: a permanent magnet and a rotor core. The rotor core includes an annular ring and a plurality of magnetic induction blocks. The magnetic induction blocks protrude outward from the outer side of the annular ring. A radial recess is formed between every two adjacent magnetic induction blocks for mounting the permanent magnet. An end plate and a base plate are disposed on an end surface and a bottom surface of the rotor core by injection molding, respectively. A first connecting column passes through a through hole of the magnetic induction block and connects the end plate and the base plate. An end surface of the end plate protrudes upward to form the magnetic loop bracket. A magnetic loop is disposed on a magnetic loop bracket.

主权项

1. A rotor assembly, comprising:
a) a permanent magnet (1); b) a rotor core (2), the rotor core (2) comprising: an annular ring (22) comprising a central axial bore (21), a plurality of magnetic induction blocks (23),a radial recess (24), an end surface, and a bottom surface, each magnetic induction block comprising a through hole (27); c) a magnetic loop (4); d) a magnetic loop bracket (3); e) an end plate (35) comprising an end surface; f) a base plate (36); and g) a first connecting column (37); wherein the magnetic induction blocks (23) protrude outward from an outer side of the annular ring (22); the radial recess (24) is formed between every two adjacent magnetic induction blocks (23) for mounting the permanent magnet (1); the end plate (35) and the base plate (36) are disposed on the end surface and the bottom surface of the rotor core (2) by injection molding, respectively; the first connecting column (37) passes through the through hole (27) and connects the end plate (35) and the base plate (36) to form a whole body; the end surface of the end plate (35) protrudes upward to form the magnetic loop bracket (3); and the magnetic loop (4) is disposed on the magnetic loop bracket (3).