CN201178342Y

CN201178342Y - Permanent magnetic rotator

Info

Publication number: CN201178342Y
Application number: CNU2008200464148U
Authority: CN
Inventors: 梁昌勇
Original assignee: KINETEK DESHENG MOTOR (FOSHAN SHUNDE) CO Ltd
Current assignee: KINETEK DESHENG MOTOR (FOSHAN SHUNDE) CO Ltd
Priority date: 2008-04-11
Filing date: 2008-04-11
Publication date: 2009-01-07
Anticipated expiration: 2018-04-11

Abstract

A permanent magnet rotor comprises a shaft, a magnet yoke and a tile-shaped permanent magnet. The magnet yoke is fixed to the shaft; the permanent magnet is tightly attached to the surface of the magnet yoke; and an N pole is adjacent to an S pole. The permanent magnet rotor is characterized in that the magnet yoke is formed by superposing a plurality of punched sheets; dovetail-shaped grooves are formed on the punched sheets which form the magnet yoke; two sides of the permanent magnet are in the shape of a dovetail; and the permanent magnet is inserted in the dovetail-shaped magnet yoke. Compared with the prior art, the permanent magnet rotor has the advantages that the manufacturing process is simple; the cost is low; the tile-shaped permanent magnet can be solidly fixed on the magnet yoke; the permanent magnet rotor can be arranged in a single section or a plurality of parallel sections because the length of the permanent magnet is not limited.

Description

A kind of p-m rotor

Technical field

The utility model relates to a kind of motor p-m rotor.

Background technology

The p-m rotor of surface watt shape permanent-magnet structure, permanent magnet is a watt shape, be evenly distributed on the cylinder yoke, for preventing the permanent magnet displacement, generally all adopt gluing method that permanent magnet is fixed on the cylinder yoke, the problem that this structure exists is: the in a single day aging permanent magnet of binding agent is very easily loosening, so, it is low that this rotor generally all is used in rotating speed, on the magneto of little load.Chinese patent 99245755.6 discloses a kind of p-m rotor, this p-m rotor is that dovetail shaped is processed in watt shape permanent magnet both sides, be provided with the press strip made from non-magnet material between the permanent magnet both sides, press strip is fastened on the yoke cylindrical with screw, utilizes the press strip both sides that permanent magnet is compressed.Though this technology has solved the easily loosening problem of ageing of binders permanent magnet, but need on the cylinder yoke, process a lot of screws, there are processing technology complexity, problem that manufacturing expense is high, in view of the foregoing, the patent No. 02248618.6 proposes a kind of end plate that non-magnet material is made that adds at the yoke two ends again, end plate has the flange identical with permanent magnet quantity, utilizes the flange on the end plate that permanent magnet is located.Though this scheme has been avoided the problem of processing screw hole on the cylinder yoke,, permanent magnet can only single-rowly use, can not use side by side by multistage, like this, the length of p-m rotor just is subjected to certain limitation, so this kind structure is commonly used in small machine or the short motor of rotor.

Summary of the invention

The purpose of this utility model is to provide that a kind of manufacturing process is simple, cost is low, a watt shape permanent magnetism physical efficiency is securely fixed on the yoke, and the utility model p-m rotor length is unrestricted, and permanent magnet can single hop, but also multistage p-m rotor arranged side by side.

The utility model purpose is achieved in that and comprises axle, yoke, tile permanent magnet composition, yoke is fixed on the axle, permanent magnet is close to the surface of yoke, the N utmost point and S are extremely adjacent, its special feature is: yoke is overrided to form by some punchings, and the punching of forming yoke has the dovetail shaped groove, and the both sides of permanent magnet are similarly dovetail shaped, permanent magnet inserts in the dovetail shaped groove of yoke, and the permanent magnet in the same dovetail shaped groove is made of the end to end permanent magnet unit more than two or two.

The dovetail groove location of permanent magnet by yoke, tangential and radially all can not produce displacement, and, need on yoke, not bore more hole, so, simple in structure, reliable operation.

Because yoke is overrided to form by punching, the processing of dovetail groove is to be finished by mould, so, easily processing, calibration is even, and rotor length is unrestricted, laminates length because length depends on fully, and permanent magnet can be single-row, but also multiple row.Permanent magnet is made of the end to end permanent magnet unit more than two or two, can adapt to the manufacturing of the rotor of different length.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

As shown in Figure 2, its structure of a kind of p-m rotor of the present utility model is mainly by permanent magnet 1, yoke 2, axle 5 constitutes, yoke 2 is fixed on the axle 5, permanent magnet 1 is close to the surface of yoke 2, the N utmost point and S are extremely adjacent, its special feature is: yoke 2 is overrided to form by some punching 2a, the punching 2a that forms yoke 2 has dovetail groove 3, the both sides of permanent magnet 1 are similarly dovetail shaped, the dovetail face of the both sides of permanent magnet 1 contacts with the dovetail face 4 of yoke dovetail groove both sides, can guarantee that permanent magnet 1 is tangential and radially all can not produce displacement, it is very reliable work, and same dovetail shaped groove 3 interior permanent magnets 1 are made of the end to end permanent magnet unit 1a more than two or two.

Because yoke 2 is overrided to form by punching 2a, the processing of dovetail groove 3 is to be finished by mould, so, easily processing, calibration is even, easily produce in batches, and rotor length depends on that fully punching 2a laminates thickness.

In order to prevent that permanent magnet 1 from moving along

dovetail groove

3,3 of permanent magnet 1 and dovetail grooves are coated with and are covered with binder 6.Because when using, on permanent magnet, do not have axial force, and, 2 of permanent magnet 1 and yokes have very strong magnetic attraction, therefore, under the normal condition, 2 of permanent magnet 1 and yokes can not relatively move, and the bonding force of binder 6 is enough to overcome the axial force (as gravity) that produces on permanent magnet.

Claims

1, a kind of p-m rotor, comprise axle, yoke, tile permanent magnet composition, yoke is fixed on the axle, permanent magnet is close to the surface of yoke, the N utmost point and S are extremely adjacent, it is characterized in that yoke is overrided to form by some punchings, and the punching of forming yoke has the dovetail shaped groove, the both sides of permanent magnet are similarly dovetail shaped, and permanent magnet inserts in the dovetail shaped groove of yoke.

2, p-m rotor according to claim 1 is characterized in that the permanent magnet in the same dovetail shaped groove is made of the end to end permanent magnet unit more than two or two.

3, p-m rotor according to claim 1 and 2 is characterized in that being coated with between permanent magnet and dovetail groove and is covered with binder.