Motor of stator and rotor split type for sewing machine

Abstract

The invention discloses a motor of a stator and rotor split type for a sewing machine, and the motor is connected with the head of the sewing machine. The motor comprises a stator, a rotor, an integrated coder, and a rear cover, wherein the rotor is a hollow shaft. The rotor, the integrated coder and the rear cover are sequentially fixed on a sewing machine main shaft in the head of the sewing machine in a coaxial and sleeved manner. The stator is fixedly connected with the head of the sewing machine. The integrated coder is connected with a needle rod of the sewing machine, and can control the angle of the needle rod of the sewing machine. A coder seat is provided with a coder installation column with adjustable height. An optical grating assembly comprises an optical grating support, an optical grating sheet, an optical grating pressure ring, and a clamping spring, wherein the optical grating support is coaxially disposed on the sewing machine main shaft in a sleeved manner, and can be rotated and fixed. After the above structure is employed, the motor is small in axial size, can save the space, is small in load inertia, and is high in sewing speed. The stator or the rotor can serve as an independent part of the sewing machine, and the motor is small in temperature rise, and is low in noise. Meanwhile, the angle of the needle rod of the sewing machine can be controlled according to the needs, and the motor is convenient in operation, and is high in sewing precision.

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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