JPS6434872U

JPS6434872U -

Info

Publication number: JPS6434872U
Application number: JP12870387U
Authority: JP
Priority date: 1987-08-25
Filing date: 1987-08-25
Publication date: 1989-03-03

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による永久磁石回
転子を示す横断面図、第２図は第１図の永久磁石
を構成する永久磁石片の斜視図、第３図は従来の
ＤＣブラシレスモータを有する密閉形電動圧縮機
の一例を示す構成概要断面図、第４図はその永久
磁石回転子の横断面図、第５図は従来の永久磁石
回転子の一例を示す縦断面図、第６図は同横断面
図である。図において、４はヨーク、５は永久磁石、６は
ケーシング、１０は面取り部である。なお、図中
同一符号は同一又は相当部分を示す。 Fig. 1 is a cross-sectional view showing a permanent magnet rotor according to an embodiment of this invention, Fig. 2 is a perspective view of permanent magnet pieces constituting the permanent magnet of Fig. 1, and Fig. 3 is a conventional DC brushless motor. FIG. 4 is a cross-sectional view of a permanent magnet rotor thereof, FIG. 5 is a vertical cross-sectional view of an example of a conventional permanent magnet rotor, and FIG. The figure is a cross-sectional view of the same. In the figure, 4 is a yoke, 5 is a permanent magnet, 6 is a casing, and 10 is a chamfered portion. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A yoke, a permanent magnet arranged on the outer periphery of the yoke divided into a plurality of parts in the circumferential direction, and a casing arranged on the outer periphery of the permanent magnet; 1. A permanent magnet rotor in which a permanent magnet and a casing are fixed by die casting, characterized in that chamfered portions are formed at both axial ends of the yoke-side inner circumferential surface of the permanent magnet. (2) The permanent magnet rotor according to claim 1, wherein the chamfered portions of the permanent magnets are formed on the entire inner circumferential surface on the yoke side of both ends of the permanent magnet in the axial direction. . (3) The permanent magnet according to claim (1) of the utility model registration claim, wherein the chamfered portions of the permanent magnet are formed on a part of the inner peripheral surface on the yoke side of both ends of the permanent magnet in the axial direction. rotor.