A stator and rotor split motor for sewing machine

Abstract

The invention discloses a stator and rotor split type motor used for sewing machines, which is connected with the head of the sewing machine and includes a stator, a rotor, an integrated encoder and a rear cover, the rotor is a hollow shaft, and the rotor, the integrated encoder and the rear cover The cover is coaxially and fixedly set on the sewing machine main shaft in the sewing machine head in turn, and the stator is fixedly connected with the sewing machine head; the integrated encoder is connected with the sewing machine needle bar, and can control the angle of the sewing machine needle bar. The encoder seat is provided with a height-adjustable encoder mounting column. The grating assembly includes a grating bracket, a grating sheet, a grating pressure ring and a retaining spring. The grating bracket is coaxially set on the sewing machine main shaft and can be rotated and fixed. After adopting the above structure, the axial dimension is small, which can save space, the load inertia is small, the sewing speed is fast, the stator or the rotor can be used as a separate part of the sewing machine, and the temperature rise is small and the noise is low. At the same time, the angle of the needle bar of the sewing machine can be controlled according to the needs, the operation is convenient, and the sewing precision is high.

Description

technical field [0001] The invention relates to a driving part of sewing equipment, in particular to a stator and rotor split motor for sewing machines. Background technique [0002] At present, the motor structure mainly has the following two types: [0003] The first type: The motor includes bearings, front end cover, rear end cover, solid shaft, encoder and grating assembly. The stator is shrunk into the casing, and the front end cover and the rear end cover are fitted through the casing and then fixed with screws. The casing needs to be stretched and deformed from the aluminum rod during the processing process, and aging treatment needs to be carried out in a constant temperature environment. Before the casing is made into a profile factory, it needs to be sandblasted and anodized; therefore, in the process from the aluminum rod to the casing In the process, it needs to consume a lot of electric energy, which increases carbon emissions; after the casing is formed, in o...

AI Technical Summary

Problems solved by technology

[0006] 1. The motor as a whole is used as a part of the sewing machine, and the stator or rotor cannot be used as a separate component

[0007] 2. The main shaft of the sewing machine and the motor shaft are connected by a coupling, so that the axial size of the sewing machine is large and will take up more space

In this way, there will be a high temperature rise, uneven thickness of the stator silicon steel sheet, resulting in a large change in the length and size of the motor, and it is difficult to ensure the size of the motor output shaft, and the front and rear end covers will be affected by the unevenness of the stator core. Parallel leads to non-parallel; it also leads to more bearing noise

[0009] 4. The encoder and grating components are separate components, and there is no mechanical connection between them

In this way, during the long-term operation of the motor, the bearing will be damaged due to the life of the bearing grease or external force, which will shorten the service life of the motor due to the damage of the bearing, and will also cause bearing noise during the normal assembly process.

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