JPH11206050A - Magnet motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain cost reduction and a decrease in the width of a gap for higher efficiency, by engaging a hook part formed at an iron core, with a recessed part formed at both side walls of permanent magnets. SOLUTION: A recessed part 11 is formed at both sides of respective permanent magnets 7a to 7d. A protruding line 12 positioned at a clearance between the respective permanent magnets 7a to 7d adjacent to each other is formed at an iron core 6, and a hook part 13 engaged with the recessed part 11 is formed respectively at both sides of the respective protruding lines 12. The respective permanent magnets 7a to 7d are fixed on the iron core 6 by engaging the hook part 13 at the recessed part 11. As a result, pipes for fastening the permanent magnets 7a to 7d can be eliminated, therefore, it is possible to provide cost reduction, and improve the efficiency of the magnet motor because eddy current flowing through piping inside can be eliminated and the width of a gap 10 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a magnet motor.

[0002]

2. Description of the Related Art An example of a conventional magnet motor is shown in FIG. 2, wherein (A) is a longitudinal sectional view taken along line AA of (B), and (B) is (A).
FIG. 3 is a cross-sectional view taken along line BB of FIG.

[0003] The magnet motor 10 comprises a stator 1 and a rotor 2. The stator 1 is configured by winding a large number of windings 5 around a cylindrical core 3 formed by laminating a large number of thin electromagnetic steel sheets through a plurality of slots 4 provided at predetermined intervals in a circumferential direction thereof.

The rotor 2 has an iron core 6 formed by laminating a large number of thin electromagnetic steel sheets, and a rotating shaft 8 is fixed through the center thereof. A plurality (four in the figure) of permanent magnets 7a, 7b,
7c and 7d are provided, and these permanent magnets 7a to 7d are fixed by a tube 9 made of a non-magnetic material such as stainless steel, which is in close contact with the outer peripheral surface.

[0005]

In the above-described conventional magnet motor, the plurality of permanent magnets 7a to 7d are fixed by the tube 9 which is in close contact with the outer peripheral surface thereof. Since the width of the gap 10 is increased by the thickness of 9, the efficiency of the magnet motor is reduced.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is that a plurality of the steel cores are provided at predetermined intervals in the circumferential direction at an outer periphery thereof. In a magnet motor having a rotor provided with permanent magnets, each of the permanent magnets is engaged by engaging a hook formed on the iron core with a recess provided on both side walls of each of the permanent magnets. A magnet motor fixed to the iron core.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIG. Concave 11 on both sides of each permanent magnet 7a-7d
Are formed. Permanent magnets 7a-
A ridge 12 located in the gap of 7d is formed.
The hooks 13 that engage with the recesses 11 are respectively formed on both side surfaces of the recess.

[0008] Each of the permanent magnets 7a to 7d is fixed to the iron core 6 by engaging a hook 13 with the recess 11 thereof. The other configuration is the same as that of the conventional one shown in FIG. 2, and the corresponding members are denoted by the same reference numerals and description thereof will be omitted.

However, since the tube 9 for fastening the permanent magnets 7a to 7d is not required, the cost can be reduced, and the eddy current flowing in the tube 9 is eliminated, and the width of the gap 10 is reduced. Since the size can be reduced, the efficiency of the magnet motor is improved.

[0010]

According to the present invention, each permanent magnet is fixed to the iron core by engaging a hook formed on the iron core with a recess provided on both side walls of each permanent magnet. Since no tube is required to fasten the magnet, the cost can be reduced, and eddy current flowing in the tube is eliminated and the width of the gap can be reduced, so that the efficiency of the magnet motor is improved.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, wherein (A) is AA of (B).
FIG. 4B is a longitudinal sectional view along the line, and FIG. 4B is a transverse sectional view along the line BB in FIG.

2A and 2B show an example of a conventional magnet motor, wherein FIG. 2A is a longitudinal sectional view taken along line AA of FIG. 2B, and FIG. 2B is a sectional view taken along line BB of FIG. .

[Explanation of symbols]

 10 Magnet motor 1 Stator 3 Core 4 Slot 5 Winding 2 Rotor 6 Iron core 7a ~ 7d Permanent magnet 8 Rotary shaft 11 Concavity 12 Ridge 13 Hook

Claims (1)

[Claims] 1. A magnet motor comprising a rotor in which a plurality of permanent magnets are arranged at predetermined intervals in a circumferential direction on an outer periphery of an iron core, wherein recesses provided on both side walls of each of the permanent magnets are provided. A permanent magnet fixed to the iron core by engaging a hook formed on the iron core with the magnet core.