Bearing-free servo motor used for industrial sewing machine

Abstract

The invention discloses a bearing-free servo motor used for an industrial sewing machine, and relates to a servo motor. A rotor of the conventional servo motor used for an industrial sewing machine generally comprises a spindle and a bearing, and has the disadvantages of high cost, large volume and big possibility of generating noise during work. The bearing-free servo motor used for the industrial sewing machine comprises a stator assembly and a rotor assembly, wherein the rotor assembly comprises a spindle and a rotor iron core externally sheathed on the spindle. The bearing-free servo motor used for the industrial sewing machine is characterized in that a spliced eye is formed in the middle of the spindle; the spindle is provided with a locking piece; after a spindle of a sewing machine nose is inserted into the spliced eye, the spindle is fixed on the main shaft of the sewing machine nose by the locking piece; and the stator assembly and the rotor assembly are respectively fixed by a sewing machine rack body and the main shaft of the sewing machine nose and are subjected to clearance fit. In the technical scheme disclosed by the invention, the bearing, a bearing housing, a coupler and the like are omitted, and the torque of the spindle is directly transferred to the main shaft of the sewing machine nose. The bearing-free servo motor used for the industrial sewing machine has the advantages of the structure is simple, the assembling is convenient, the cost is low and the volume is small, and the reduction of noise is facilitated, force transferring pieces are reduced, and the work reliability is improved.

Description

Technical field [0001] The present invention relates to a servo motor. Background technique [0002] The existing servo motors for industrial sewing machines include a stator and a rotor. The rotor generally includes a rotating shaft and a bearing sheathed on the rotating shaft. From the structural form, there are mainly the following defects: [0003] 1. The use of the bearing requires the support and position for the installation of the bearing. The support generally requires the front and rear end cover bearing chambers. The processing accuracy of the bearing chamber is relatively high, the processing cost is relatively high, and the remaining space also requires corresponding space, which will cause the volume of the motor. The relative increase. [0004] 2. Bearing as a part is also a material cost, which leads to an increase in the cost of the entire motor. [0005] 3. The assembly of the bearing has certain requirements, and the installation needs proper technology to standar...

AI Technical Summary

Problems solved by technology

[0003] 1. The use of bearings requires the support and location of the bearings. The support generally requires a front and rear end cover bearing chamber. The machining accuracy of the bearing chamber is relatively high, and the processing cost is relatively high. The corresponding space required for the reserved position will cause the volume of the motor The relative increase of

[0004] 2. As a part, the bearing itself is also a material cost, which leads to an increase in the cost of the entire motor

[0005] 3. The assembly of the bearing has certain requirements, and the installation needs to be regulated by an appropriate process, and the assembly man-hour will also become a process cost, which will increase the manufacturing cost of the motor

[0006] 4. The traditional installation method of the motor and the sewing machine is to add a coupling at the shaft extension of the motor. This installation method has high requirements for the runout of the motor shaft extension, and the sewing machine also needs a matching coupling to cooperate with the motor coupling. In use, the cooperation of the coupling requires relatively high machining accuracy, especially the control of the coaxiality of the two. If the coaxiality cannot be controlled well, the noise during the operation of the sewing machine will increase, which will affect the performance of the machine and shorten it. The service life of the sewing machine

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