Expansion method and expansion device for coils in stator core slots of motor

Abstract

The invention discloses an expansion method for coils in stator core slots of a motor, which comprises the following steps: S1, the previous unidirectional expansion is changed into two-way expansion;S2, the movement of different expansion sheets is controlled through the axial movement of an expansion push rod in the middle, the expansion sheets are divided into at least three groups of expansion structures, one group of expansion sheets is stretched out and expanded outward when the expansion push rod moves down axially, another group of expansion sheets is stretched out and expanded outward when the expansion push rod moves up axially, and the remaining group of expansion sheets is always in the original position (namely, in the initial state) no matter how the expansion push rod moves; and S3, when the expansion push rod is in the middle position, all the expansion sheets are in the original positions, and a motor stator is shaped at the moment. The invention also discloses an expansion device for coils in stator core slots of a motor. The method and the device can improve the working efficiency and reduce the labor cost.

Description

technical field [0001] The invention relates to the technical field of a stator expansion shaping machine, in particular to a coil expansion method and expansion device used in a motor stator iron core slot. Background technique [0002] For the stator of the motor, it is composed of a stator core and a coil, wherein a part of the coil is wrapped by insulating paper and embedded in the slot of the stator core to form a coil in the hole of the stator, and the other part of the coil is The outer coil of the stator is formed outside the inner hole of the stator core. Usually the coil is embedded longitudinally on the stator core manually or by a wire inserting machine. However, for stator cores with high slot fullness rate, main and auxiliary phases, etc., it is not convenient to insert wires once, and it needs two to three times to insert wires. To the creepage distance between the stator and the rotor, therefore, it is necessary to reshape the coil after embedding the wire....

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a coil expansion method and expansion device used in the stator core slot of the motor, so as to overcome the problems of low work efficiency and high labor cost caused by the need for two machines to operate the existing expansion and shaping machine

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