Key structure for large load motor iron core and rotating shaft transmitting torque, and installation method thereof

Abstract

The invention discloses a structure of a key of heavy-load motor iron core and rotating shaft transmission torque and an installation method thereof. The structure comprises an iron inner circle provided with at least a pair of key slots opposite to each other for 180 DEG; a plurality of welding webs uniformly distributed on the peripheral surface of a motor rotating shaft; key slots corresponding to the iron core key slots opened on outer rings of the welding webs and a key embedded in the key slots; wherein the key is composed of a pair of taper keys in parallel with the same structure; one lateral surface of each taper key is an inclined plane, and the other lateral surface of the taper key is step-shaped, namely, the middle lower part of the lateral surface is provided with a right angle shaped depression; the pair of key slots is matched with the opposite key slot walls of the iron core and the welding web through the step-shaped lateral surface, and the opposite inclined planes of the key slots are combined by the form of inclination complementation. The adoption of the structure of the key of heavy-load motor iron core and rotating shaft transmission torque of the invention can meet the mechanical strength of the motor when the overload is three times more than load; furthermore, the structure is convenient for assembly and easy for mass production.

Description

technical field [0001] The invention relates to a structure of a shaft key and an installation method of a key for torque transmission between an iron core and a rotating shaft, in particular to a structure and an installation method for a key for transferring torque between an iron core and a rotating shaft of a large-load motor. Background technique [0002] The key is mainly used to realize the circumferential fixation of the shaft and the parts on the shaft (such as gears and pulleys) to transmit torque; some can also realize the axial fixation of the parts on the shaft to transmit axial force; some can form a shaft Kinematic joints allow parts to slide on shafts. In the motor, the shaft is the motor shaft, and the part on the shaft is the armature core. In the metallurgical industry, the motor needs to drive loads such as the main rolling mill, coiler, punching and shearing machine, etc. These loads are mostly impact loads, and most of them are S9 working systems with ...

AI Technical Summary

Problems solved by technology

This method requires the outer diameter of the shaft to be matched with the inner diameter of the rotor punch, the rotor punch and the shaft cannot be produced synchronously, and the rotor core needs to be shrunk, which increases the requirements for the equipment process, and sometimes the rotor core and the shaft are in actual operation. shaft slipping

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