Motor external stator with adjustable inner diameter and manufacturing method of motor external stator

Abstract

The invention discloses a motor external stator with adjustable inner diameter, which is characterized in that the stator core is formed by superposing a plurality of annular stator core stampings with integral structures; tooth sheets of the stator core stampings are correspondingly superposed to form unit tooth blocks of the stator core; a connected body of the stator core stampings are correspondingly superposed to form a connecting part among the unit tooth blocks; a major yoke part of the stator core is formed on the tooth root part of the unit tooth blocks; a secondary yoke part of the stator core is formed by bending the connecting part into ear shape; and the peripheral surface of the stator core is in close fit with a strap to form the whole structure of the motor external stator. According to the motor external stator with adjustable inner diameter, the winding difficulty is reduced; the diameter of the motor stator can be changed by controlling the contraction degree of the stator core by changing the inner diameter of the strap and the size of cushion block so as to be suitable for the rotors with different diameters, and the production cost of the motor is greatly reduced.

Description

technical field [0001] The invention relates to a motor outer stator, in particular to an inner diameter adjustable motor outer stator capable of realizing mechanized winding and a manufacturing method thereof. Background technique [0002] Most of the iron cores of traditional external stator motors are made of stacked and riveted circular sheet materials. The stator core and stator manufactured by this manufacturing process have the following problems: [0003] 1. The utilization rate of circular iron core punching material is low, generally not more than 30%. [0004] 2. If figure 1 , figure 2 As shown, the notch a1 of the stator core has a large opening, but the slot fullness rate is low. Probe-type winding machine is used for production. Since the winding probe needs to leave a space for itself to pass through when it moves in slot a, the slot full rate cannot be made too high, and because the space for the winding probe needs to be reserved, the iron core The slot...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a motor outer stator with adjustable inner diameter and its manufacturing method using integral stator core punching, which solves the problem of interference caused by insufficient slot space when the winding probe moves, and obtains The outer stator can achieve high slot fullness and small slot or no slot design, which reduces the difficulty of winding, enables mechanized operation, greatly improves winding efficiency, reduces manufacturing costs, and is more conducive to automatic production

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