Motor rotor iron core, motor rotor, motor and washing machine

Abstract

The invention provides a motor rotor iron core, a motor rotor, a motor and a washing machine. The motor rotor iron core (1) is formed by successive connection and winding of a plurality of bar-shapedpunching sheets (2); when the multiple bar-shaped punching sheets (2) are unfolded, a notch (3) is formed between each two adjacent bar-shaped punching sheets (2), so that the plurality of bar-shapedpunching sheets (2) are bent in a winding state to form a circular ring structure so as to accommodate a magnet in the circular ring structure. Therefore, the plurality of bar-shaped punching sheets with notches are bent to form the circular structure to form a cylindrical rotor iron core by winding moulding, so that the roundness of the rotor iron core is ensured and natural centering of the rotor is realized; and thus a phenomenon that the gas gap uniformity of the motor is affected by different radial positions of permanent magnets is avoided.

Description

Technical field [0001] The invention belongs to the technical field of motors, and specifically relates to a motor rotor iron core, a motor rotor, a motor and a washing machine. Background technique [0002] The existing patent number CN102403810B discloses a direct drive motor rotor of a washing machine. The iron core of the rotor is formed by cutting a steel pipe or a bent steel plate. This structure can form the magnetic circuit of the rotor while ensuring the housing Stiffness. However, the iron core is integrally wound, which easily causes the iron loss of the rotor iron core to increase; in addition, it is difficult to reshape the cut or crimped steel plate after forming, which makes it difficult to ensure the roundness of the iron core of the structure, which directly causes the permanent magnet to radially The position is different, and the air gap of the motor is uniform. In addition, the radiating holes and radiating blades of the rotor are punched out of circular ste...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the roundness of the iron core formed by the motor rotor core in the prior art is difficult to guarantee, which causes the radial position of the permanent magnet to be different and affects the uniformity of the air gap of the motor, thereby providing a Motor rotor core, motor rotor, motor and washing machine

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