High-strength electromotor rotary shaft with vent holes

Abstract

The invention discloses a high-strength electromotor rotary shaft with vent holes. The high-strength electromotor rotary shaft comprises a motor rotary shaft, a hollow shaft, a front barrel and a rear barrel, wherein the motor rotary shaft penetrates through the hollow shaft; the front barrel and the rear barrel are sleeved with the hollow shaft respectively ; multiple key grooves are formed in the inner walls of the front barrel and the rear barrel in a surrounding manner; multiple supporting ribs are mounted in the multiple key grooves in an embedding manner and annularly sleeve the motor rotary shaft; the gaps between every two adjacent supporting ribs form the vent holes. The high-strength electromotor rotary shaft is reasonable in structure; the excircle faces of the front barrel and the rear barrel are of entire-circle structures, so that the hollow shaft (rotor core) and the motor rotary shaft are in entire-surface contact fit, the strength of the electromotor rotary shaft is improved, and an electromotor can conveniently work under the severe working conditions such as frequent positive and negative rotation as well as frequent overload; in addition, the larger vent holes are formed in the hollow shaft, so that the cooling and heat dissipation of the hollow shaft and the motor rotary shaft are facilitated, and the service life of the electromotor is prolonged.

Description

technical field [0001] The invention relates to the field of motor shafts, in particular to a high-strength motor shaft with ventilation holes. Background technique [0002] In the design of large and medium-sized motors, due to the increase of the inner diameter of the rotor, it is often necessary to adopt a hollow shaft structure, but the traditional hollow shaft only has ribs, and the key grooves are milled on the ribs to cooperate with the rotor core, so that the ribs and the rotor core are aligned. contact, it is prone to failure under severe working conditions such as frequent forward and reverse rotation and frequent overload. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength motor shaft with ventilation holes to improve the strength of the motor shaft so that it can adapt to harsh working conditions, ensure the ventilation and cooling effect of the motor shaft, and prolong the service life of the motor. [00...

AI Technical Summary

Problems solved by technology

[0002] In the design of large and medium-sized motors, due to the increase of the inner diameter of the rotor, it is often necessary to adopt a hollow shaft structure, but the traditional hollow shaft only has ribs, and the key grooves are milled on the ribs to cooperate with the rotor core, so that the ribs and the rotor core are aligned. contact, it is prone to failure under severe working conditions such as frequent forward and reverse rotation and frequent overload

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