JPS62185440U

JPS62185440U -

Info

Publication number: JPS62185440U
Application number: JP7182086U
Authority: JP
Priority date: 1986-05-15
Filing date: 1986-05-15
Publication date: 1987-11-25

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例に係るカゴ形誘導
電動機の回転子構造を示す要部断面図、第２図は
第１図の―線断面図、第３図は作用説明図、
第４図は従来のカゴ形誘導電動機の回転子構造を
示す要部側面図、第５図は第４図の―線断面
図である。図において、１は回転子軸、２は回転子鉄心、
３は回転子棒取付溝、４は回転子棒、８は通風溝
、８ａは通風溝８の両端開口部、９は通風孔であ
る。なお、各図中、同一符号は同一または相当部
分を示す。 FIG. 1 is a cross-sectional view of a main part showing the rotor structure of a squirrel-cage induction motor according to an embodiment of this invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG.
FIG. 4 is a side view of a main part showing the rotor structure of a conventional squirrel-cage induction motor, and FIG. 5 is a sectional view taken along the line -- in FIG. 4. In the figure, 1 is the rotor shaft, 2 is the rotor core,
3 is a rotor rod mounting groove, 4 is a rotor rod, 8 is a ventilation groove, 8a is an opening at both ends of the ventilation groove 8, and 9 is a ventilation hole. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] A rotor core held on a rotor shaft, a rotor rod mounting groove provided in the rotor core, and a rotor fitted and fixed in the rotor rod mounting groove. In the rotor structure of a squirrel-cage induction motor having a rod, a ventilation groove is provided at least at the bottom of the rotor rod mounting groove, extends in the direction of the surface of the outer wall of the rotor rod, and opens at both end surfaces of the rotor core. and a ventilation hole provided in a rotor rod and communicating with the ventilation groove and open on the outer peripheral surface of the rotor core.