Motor rotor

Abstract

The invention relates to a motor rotor. A rotor iron core is sleeved outside a rotor shaft; both ends of the rotor iron core are provided with end rings; the rotor iron core is formed by laminating a plurality of rotor punching sheets; a circle of uniformly distributed guide strip holes are arranged in the rotor punching sheets; the guide strip holes in the rotor punching sheets form a circle of guide strip groove positioned on the circumference surface of the rotor iron core after the rotor punching sheets are laminated; copper guide strips are tightly configured in the guide strip groove; and the two end rings and both ends of the copper guide strips form a die-casting integral type structure or riveting connection. By using the motor rotor, the performance of a motor can be ensured, simple process and high working efficiency can be achieved and the production cost can be reduced.

Description

Technical field: [0001] The invention relates to a motor rotor. Background technique: [0002] Motor refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction, including a stator and a rotor. At present, cast copper rotors are usually used, and copper casting is performed in the guide slots formed by stacking the rotor punches, which can reduce the current loop loss and improve the efficiency of the motor. However, there are disadvantages such as poor process stability, easy generation of air bubbles and other phenomena that affect the performance of the motor, and high production costs. In order to improve this phenomenon, copper guide bars are arranged in the guide bar grooves formed by stacking the rotor punching sheets, and end rings are arranged at both ends of the copper guide bars. For example, the motor rotor disclosed in Patent No. 200920141813. Copper guide bars are embedd...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: First, it adopts welding connection. During the welding process, the rotor needs to be heated to a certain temperature to meet the welding process requirements, so that the copper guide bar and the copper end ring have a good welding force, or A large amount of heat is generated during the welding process, which causes the rotor punch to be overheated and affects the performance of the motor. The shape of the guide bar changes, and the process is complicated; the third is that welding is manual, the process is complicated, and the work efficiency is low; the fourth is that copper end rings are used on high-power motors, and the production cost is high.

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