External core structure of linear motor stator and assembly method thereof

Abstract

This invention discloses an iron core structure and assembling method for straight line motor stator, which contains cylindrical bobbin made of insulation material, windings, laminated unit forming magnetic beam with magnetic force produced by windings, upper and lower frame fro fixing laminated unit, upper and lower iron core welded with laminated unit, said structure has not size reducing caused by contraction using resin, and the high permeability is lost due to the crystal grain being destroyed by welding, so the magnetic beam loss between tips is prevented

Description

technical field [0001] The invention belongs to a stator structure of a linear motor, in particular to a linear motor stator outer iron core structure and an assembly method which can correctly control the inner diameter of the outer iron core and prevent magnetic flux loss when assembling components. Background technique [0002] Generally speaking, the linear motor is to make the magnetic flux of the ordinary motor with a three-dimensional structure into a planar shape, and make the moving part of the planar shape move linearly on the plane according to the change of the magnetic flux formed on the fixed part of the plane. Such as figure 1 , 2 , 3, the linear motor in the past includes: a stator made of an outer iron core (10) and a cylindrical inner iron core (20) that can be inserted into the outer iron core (10); ) and the inner iron core (20) to move between the outer iron core (10) or the inner iron core (20) and to attach a plurality of permanent magnets (32) to th...

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Problems solved by technology

[0006] However, in the conventional linear motor stator having the above structure, the resin (14) formed to fix the unit stack (11) of the outer iron core (10) shrinks thermally after injection molding and the unit stack (11) It is pushed inward, reducing the accuracy of the inner diameter, so the gap (24) between the permanent magnet (32) and the outer iron core (10) cannot maintain an appropriate distance and narrows, resulting in difficulty in controlling the gap (24)

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