JP2002369433A - Magnet motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnet motor for a drive of a sealed compressor or the like, capable of ensuring high quality without inhibiting improvement in motor efficiency, downsizing the motor, and increasing volume efficiency. SOLUTION: A bobbin for coil, in which a plurality of electric wires are wound around a fitting dead space fitted onto stator teeth, is fitted onto the stator teeth to form a stator core; one of the stator teeth and a fitting surface of the bobbin for coil includes a protruding section and the other includes a recessed groove section, engaged with the protruding section to form the magnetic motor; thus damages from occurring because of the contact of the electric wire can be prevented and the stator teeth by winging the electric wire outside the stator, reduce the resistance of the coil by shortening the average coil peripheral-length of the electric wire, and increase volume efficiency and ensure high quality of the magnetic motor, by appropriately fixing the fitting position with respect to the stator teeth of the bobbin for coil in engaging the protruding section with the recessed groove section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet motor used as a drive device for a hermetic compressor or the like.

[0002]

2. Description of the Related Art An outline of a magnet motor conventionally used for a hermetic compressor will be described with reference to FIGS. FIG. 6 shows a longitudinal section of a conventional hermetic compressor magnet motor, and is a sectional view taken along line DD of FIG. 7, and FIG. 7 is a sectional view taken along line CC of FIG.
It is sectional drawing.

[0003] Reference numeral 10 denotes a magnet motor.
Numeral 0 is composed of the stator 1 and the rotor 2. The stator 1 is provided with a large number of electric wires 5 through a plurality of slots 4 provided at predetermined intervals in a circumferential direction of a cylindrical stator core 3 formed by laminating a large number of thin magnetic steel plates.
Is wound to form a coil.

The rotor 2 has a cylindrical shape, and is formed by laminating a number of thin magnetic steel plates. The magnetic poles of the rotor 2 are circumferentially spaced at a predetermined interval in the circumferential direction of the iron core 6. ,
And multiple buried as close to the outer surface as manufacturing permits
It is configured to have (four in this example) permanent magnets 7. A rotating shaft 8 is fixed through the center of the iron core 6.

An upper end plate 11 is provided at an upper end position of the rotor 2 and a lower end plate 12 is provided at a lower end position. The iron core 6, the permanent magnet 7, the upper end plate 11, and the lower end plate 12 are integrally fixed by rivets 13. Have been.

In the stator 1 having the above structure, when a large number of electric wires 5 are wound around a plurality of slots 4 provided in a cylindrical stator core 3 formed by laminating a large number of thin magnetic steel sheets, a coil is formed. The method is performed by inserting the electric wires 5 from the gaps 15 between the individual stator teeth 14 forming the following.

[0007]

However, in the conventional stator 1 having the above-described structure, the stator teeth 14
Of the electric wire 5 entering the slot 4
, That is, the amount of copper is limited, and the motor efficiency is reduced. In addition, when the electric wire 5 is inserted, there is a problem that the contact with the stator teeth 14 causes a flaw in this portion.

In order to prevent the above-mentioned damage, the stator teeth 14 are protected by the slot insulating paper 20. However, since both ends of the slot insulating paper 20 are provided with the corner portions 21 for protecting the corner portions of the stator and preventing falling off. In addition, there has been a problem that the average coil circumference of the electric wire 5 is increased, the coil resistance is increased, the improvement of the motor efficiency is hindered, and the motor shape is increased.

In addition, since the size of the gap 15 between the stator teeth 14 is small, the amount of the electric wire 5 entering the slot 4, that is, the amount of copper is restricted, and the amount of copper in the cross section is improved in order to improve the motor efficiency. As an additional measure, when winding a plurality of wires having different diameters of the wire 5, since a plurality of wires are wound at the same time, the wires are twisted and a space is created, the space factor is deteriorated, and the amount of wound copper is reduced. , Which hinders improvement of motor efficiency.

The present invention solves such a problem in the conventional magnet motor for a hermetic compressor, achieves high quality without hindering improvement in motor efficiency, and achieves compactness in mass production. It is an object of the present invention to provide a magnet motor having enhanced effects.

[0011]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. As a first means, a number of thin steel plates are laminated and provided at a predetermined interval in a circumferential direction. A stator core formed by winding an electric wire corresponding to a plurality of stator teeth, and a plurality of thin steel plates are disposed at predetermined intervals in a circumferential direction of an iron core that is disposed with a gap in the center of the stator core and that is formed by laminating a large number of thin steel plates. In a magnet motor including a rotor formed by embedding a permanent magnet, the stator core has a fitting cavity fitted with the stator teeth, and a coil bobbin around which a number of electric wires are wound is provided around the stator teeth. A fitting surface formed between the stator teeth and the bobbin for coil is provided with a protruding portion extending in the longitudinal direction of the fitting surface on one side and a concave portion engaging with the protruding portion on the other side. Magnetic with groove It is intended to provide a motor.

In other words, according to the first means, the magnet motor is configured such that a coil bobbin around which a number of electric wires are wound around a fitting space to be fitted with the stator teeth is fitted to the stator teeth to form a stator core. Is formed on the fitting surface between the stator teeth and the coil bobbin, on one side is provided a convex ridge extending in the longitudinal direction of the fitting surface, and on the other is provided a concave groove for engaging with the convex ridge. Therefore, the electric wire can be wound outside the stator, and a large number of electric wires can be installed without causing damage due to the contact between the electric wire and the stator teeth. The average coil circumference is shortened to reduce the coil resistance, thereby improving the motor efficiency.Also, the engagement position of the coil bobbin with the stator teeth is appropriately fixed by the engagement of the ridges and the grooves, Enhance the mass production effect of magnet motors It is obtained so as to improve the quality of.

According to a second aspect of the present invention, in the first aspect, the convex portion provided on one of the fitting surfaces of the stator teeth and the coil bobbin is provided in a plurality in the longitudinal direction. The present invention provides a separately formed magnet motor.

That is, according to the second means, on the fitting surface of the coil bobbin to be fitted to the stator teeth, the convex ridge of the convex ridge and the concave groove to be engaged at the time of the fitting is formed. By forming a plurality of sections in the longitudinal direction, the ridges can be replaced with a plurality of ridges by omitting high-precision linear processing, and manufacturing and assembling a bobbin for a coil, and eventually a magnet motor. This simplifies maintenance and other processes.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a longitudinal section of the magnet motor according to the present embodiment, and is a sectional view taken along line AA of FIG. 2, FIG. 2 is a sectional view taken along line BB of the magnet motor shown in FIG.
4A is a top view, FIG. 4B is a front view, and FIG. 4 is an explanatory view of a stator tooth and a coil bobbin press-fit into the same.
(A) is a top view of a stator tooth, (b) is a top view of a coil bobbin.

For the sake of simplicity, the same parts as those of the above-described conventional apparatus are denoted by the corresponding reference numerals of 100 in the figure, and redundant description is omitted as much as possible in this embodiment. The points specific to the embodiment will be mainly described.

That is, in the present embodiment, the magnet motor 110 includes a stator 101 and a rotor 102 having the same structure as that of the conventional apparatus. Here, the stator 101 has a plurality of slots 104 and a plurality of stator teeth 114 formed at predetermined intervals in a circumferential direction on a cylindrical stator core 103 formed by laminating a large number of thin magnetic steel plates. On both side surfaces of the stator teeth 114, concave grooves 114a extending in the laminating direction of the magnetic steel plates are provided.

On the other hand, a plurality of coil bobbins 120 are provided separately from the stator core 103, and the coil bobbins 120 have a fitting cavity 120a in the center thereof, the size of which fits with the stator teeth 114. In addition, the coil is formed by winding a number of electric wires 105 around the coil bobbin 120.

In the fitting space 120a of the coil bobbin 120, a fitting surface for fitting with the stator teeth 114 is provided in the longitudinal direction of the fitting space 120a, that is, the concave groove 114a of the stator teeth 114. Ridge 1 extending in the same direction as
When the fitting cavity 120a provided in the coil bobbin 120 is press-fitted to the stator teeth 114, the ridge 120b is engaged with the concave groove 114a.

As described above, in this embodiment, after the electric wire 105 is wound around the coil bobbin 120, the coil bobbin 120 is attached to the stator teeth 114 arranged at equal intervals on the circumference, and the arrow is shown in FIG. A stator 101 is constructed by press-fitting in the direction indicated by A.

Here, when the coil bobbin 120 is press-fitted to the stator teeth 114, the convex ridges 120b provided in the fitting cavities 120a of the coil bobbins 120 are fitted into the concave grooves 114a provided on both side surfaces of the stator teeth 114. Are engaged, and the fitting position between the coil bobbin 120 and the stator teeth 114 is determined.

As described above, according to the present embodiment, since the electric wire can be wound outside the stator 101, a large number of electric wires 105 can be prevented from being damaged by contact between the electric wires 105 and the stator teeth 114 and the like. Can be installed in the slot 104, and the engagement position of the coil bobbin 120 with the stator teeth 114 is appropriately fixed by the engagement of the concave groove portion 114a and the ridge portion 120b, so that the mass production effect is enhanced and the electric wire 105 is damaged. This makes it possible to manufacture high-quality magnet motors without any problems.

Also, by using the coil bobbin 120,
This eliminates the need for the slot portion of the slot insulating paper of the conventional component, reduces the average coil circumference of the electric wire 105, and reduces the coil resistance, thereby contributing to an improvement in motor efficiency.

Next, a second embodiment of the present invention will be described with reference to FIG. 5A and 5B are explanatory views of the coil bobbin alone mounted on stator teeth in the magnet motor according to the present embodiment, wherein FIG. 5A is a top view and FIG. 5B is a front view.

For the sake of simplicity, the same parts as those in the first embodiment are shown in FIG.
The same reference numerals are assigned to the 0 units, and the overlapping description will be omitted as much as possible, and the points unique to the present embodiment will be mainly described.

In the present embodiment, the first embodiment
In the form, the ridge 120 of the coil bobbin 120 is engaged with the concave groove 114a of the stator tooth 114 over its entire length.
b is formed so as to extend in the longitudinal direction of the fitting space 120a in accordance with the extension of the concave groove 114a, whereas a plurality of projecting ridges 220 divided into a plurality in the same longitudinal direction are formed.
b, or one or more ridges shortened in the longitudinal direction.

That is, the coil bobbin 220 of this embodiment is provided with one or more projecting ridges 220b which are divided into a plurality of sections or are formed short in the fitting space 220a. Are fitted with the stator teeth 214 when the plurality of sectioned or short ridges 220
b engages with a concave groove portion of the stator teeth 214 (not shown, but is provided at a position where a plurality of ridges 220b are engaged) to determine a fitting position.

Therefore, according to the present embodiment, the ridge 22
Ob can be replaced with a plurality of or short protrusions by omitting high-precision straight-line processing, so that the steps of manufacturing, assembling, and maintaining can be simplified.

Although the present invention has been described with reference to the illustrated embodiments, the present invention is not limited to such embodiments.
It goes without saying that various changes may be made to the specific structure within the scope of the present invention.

For example, in each of the above-described embodiments, the concave groove and the convex ridge that engage with each other to position the coil bobbin are formed by forming the former concave groove into the stator teeth and the latter convex ridge. Although described as being formed on the coil bobbin, these may be reversed to form the concave groove on the coil bobbin and the ridge on the stator teeth.

[0031]

According to the invention as set forth in claim 1 of the present application, a large number of thin steel plates are laminated, and an electric wire is wound around a plurality of stator teeth provided at predetermined intervals in the circumferential direction. And a rotor formed by embedding a plurality of permanent magnets at predetermined intervals in the circumferential direction of an iron core formed by laminating a large number of thin steel plates and disposed at the center of the stator core with a gap therebetween. In the magnet motor, the stator core is formed by fitting a coil bobbin around which a large number of electric wires are wound around the stator teeth with a fitting space fitted with the stator teeth, and the stator teeth are formed. On the fitting surface with the coil bobbin, one side is provided with a convex ridge extending in the longitudinal direction of the same fitting surface, and the other side is provided with a concave groove that engages with the convex ridge to constitute a magnet motor. So, when making it The wire can be wound outside the stator, and a large number of wires can be installed without causing damage due to the contact between the wires and the stator teeth. Shortening the average coil circumference to reduce the coil resistance, improve motor efficiency, and properly fix the fitting position of the coil bobbin to the stator teeth by engaging the ridges and grooves,
It is possible to obtain a suitable magnet motor which has improved the mass production effect of the magnet motor and achieved high quality.

According to a second aspect of the present invention, in the first aspect of the present invention, the protrusion provided on one of the fitting surfaces of the stator teeth and the coil bobbin has a longitudinal direction. To form a magnet motor, so that the convex ridges and the concave grooves on the fitting surface of the coil bobbin to be fitted to the stator teeth are formed in plural in the longitudinal direction. By forming it separately, it is possible to omit high-precision straight-line processing (at the time of its manufacture), and to simplify the steps of manufacturing, assembling, and maintaining the coil bobbin and thus the magnet motor. Thus, a suitable magnet motor achieving the above was obtained.

[Brief description of the drawings]

FIG. 1 shows a longitudinal section of a magnet motor according to a first embodiment of the present invention, and is an AA sectional view of FIG.

FIG. 2 is a sectional view taken along line BB of the magnet motor shown in FIG.

FIG. 3 is an explanatory diagram of a coil bobbin alone mounted on stator teeth.

4A and 4B are explanatory diagrams of stator teeth and a coil bobbin press-fitted into the stator teeth. FIG. 4A is a top view of the stator teeth, and FIG. 4B is a top view of the coil bobbin.

5A and 5B are explanatory views of a coil bobbin alone mounted on stator teeth in a magnet motor according to a second embodiment of the present invention, wherein FIG. 5A is a top view and FIG. 5B is a front view.

6 is a vertical sectional view of a conventional hermetic compressor magnet motor, and is a sectional view taken along line DD of FIG. 7;

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Stator core 4 Slot 5 Electric wire 6 Iron core 7 Permanent magnet 8 Rotating shaft 10 Magnet motor 11 Upper end plate 12 Lower end plate 13 Rivets 14 Stator tooth 15 Gap 20 Slot insulating paper 21 Edge part 101 Stator 102 Rotor 103 Stator core 104 Slot 105 Electric wire 107 Permanent magnet 108 Rotating shaft 114 Stator tooth 114a Depressed groove 120 Coil bobbin 120a Fitting space 120b Convex ridge 214 Stator tooth 220 Coil bobbin 220a Fitting vacancy 220b Convex ridge

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Yokoi 1 at 60 Kutani, Iwazuka-cho, Nakamura-ku, Nagoya-shi F term (reference) 5H604 AA08 BB01 BB10 BB14 CC01 CC05 CC16 PB03 PB04 QA03 QA08

Claims (2)

[Claims] 1. A stator core formed by laminating a large number of thin steel plates, winding an electric wire corresponding to a plurality of stator teeth provided at predetermined intervals in a circumferential direction, and having a gap in the center of the stator core. In a magnet motor consisting of a rotor formed by burying a plurality of permanent magnets at predetermined intervals in a circumferential direction of an iron core formed by laminating a large number of thin steel plates, the stator core is fitted to the stator teeth. A coil bobbin around which a number of electric wires are wound around the fitting space is provided on the stator teeth, and the coil bobbin is formed on the fitting surface between the stator teeth and the coil bobbin. A magnet motor comprising: a protruding ridge extending in a longitudinal direction of a mating surface; and a concave groove for engaging with the protruding ridge provided on the other side. 2. The magnet according to claim 1, wherein the ridge provided on one of the fitting surfaces of the stator teeth and the coil bobbin is formed in a plurality of sections in the longitudinal direction. motor.