JP2001211574A - Stator core for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a point of issue in fabricating stator core for motor that, for example, the dimension of stator core in the thickness direction cannot be reduced, which conventionally is fixed by mutually connecting laminated cores divided in four pieces at every three-pole teeth in circumferential direction with reinforcement thick rings and pins securing its true roundness. SOLUTION: In a type of stator core for motor adopting each core piece four-divided in the circumferential direction at every three pole teeth, a laminated core piece is made by stacking each core piece in order and a ringed core is made by connecting the laminated core pieces. A 12 pole teeth stator core is fabricated by laminating each ringed core shifting to the other by 30 deg. in order to secure its true roundness by driving a pin to each penetrating hole on the yoke.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator core of an electric motor mounted on household electric appliances (for example, fully automatic washing machines, dishwashers and the like), and more particularly to an annular magnetic circuit. In order to make a 12-pole stator core of a motor forming The present invention relates to a method for joining divided iron core pieces and a method for joining annular iron cores.

[0002]

2. Description of the Related Art Conventionally, 12 motors forming an annular magnetic path have been used.
For example, a method of connecting laminated iron core pieces divided into four in the circumferential direction for every three pole teeth in order to obtain a pole tooth stator core is disclosed in, for example, Japanese Patent Application Laid-Open No. H11-234928. In addition, there is a technique in which the meat pressure ring and the pin are fixed while securing roundness.

[0003]

However, the meat pressure ring is not a member suitable for forming a magnetic path, such as an iron core piece made of a hot-rolled silicon steel sheet having a thickness of 0.35 mm, but is used for reinforcement. Due to the nature of the member described above, an iron material or the like is employed, and since it is attached to both sides of the 12-pole tooth stator core of the motor, there is a problem that the thickness direction of the 12-pole tooth stator core of the motor does not become thin. .

The present invention has been made in view of such problems of the prior art, and an object thereof is to ensure roundness without employing a reinforcing pressure ring. It is an object of the present invention to provide a 12-pole tooth stator core of a motor that does not require reinforcement.

[0005]

In order to achieve the above object, a 12-pole tooth stator core of a motor according to the present invention has the following features. In the case of employing core pieces divided into four in the circumferential direction for every three pole teeth, the core pieces are sequentially laminated to form a laminated core piece, and the laminated core pieces are connected to form an annular core. The annular iron cores are shifted from each other by 30 ° or 60 ° and stacked in order to form a 12-pole tooth stator iron core, and a pin is driven into a through hole provided in the yoke to ensure roundness.

In the case of employing core pieces divided into three in the circumferential direction for every four pole teeth, the core pieces are sequentially laminated to form a laminated core piece, and the laminated core pieces are connected to form an annular core piece. The annular cores are shifted from each other by 30 °, 60 ° or 90 ° and stacked in order to form a 12-pole tooth stator core, and a pin is driven into a through hole provided in the yoke to ensure roundness. It is characterized by.

In the case of employing iron core pieces divided into two in the circumferential direction for every six pole teeth, the iron core pieces are sequentially laminated to form a laminated iron core piece, and the laminated iron core pieces are connected to form an annular iron core. And the annular cores are connected to each other by 30 °, 60 °, 90 °, 12 °.
It is characterized in that a 12-pole tooth stator core is formed by sequentially laminating the stator core by shifting it by 0 ° or 150 °, and a pin is driven into a through hole provided in the yoke to ensure roundness.

[0008]

Embodiments of the present invention will be described with reference to the drawings. A description will be given of a 12-pole stator iron core 30 of a motor according to a first embodiment of the present invention in which iron core pieces 10 divided into four in the circumferential direction for every three pole teeth are employed. FIG. 1 is a plan view of an iron core piece 10 divided into four parts in the circumferential direction for every three pole teeth. FIG. 2 is a plan view of the 12-pole tooth stator core 30 of the electric motor according to the first embodiment of the present invention. FIG. 3 is a partial perspective view of the 12-pole tooth stator core 30 (one of the first embodiment) when the annular cores 21 are sequentially stacked while being shifted by 30 ° from each other.
For example, from a hot-rolled silicon steel sheet having a thickness of 0.35 mm, 3
Pole teeth 11, a yoke 12, and the pole teeth 11 and / or
Or, a projection 13 provided on the yoke portion 12, a through hole 14 provided on the yoke portion 12, and a convex portion 15 provided at a right end (or a left end portion) of the yoke portion 12. , The yoke 1
(2) The core piece 10 having the concave portion 16 provided at the left end (or the right end) is cut. The embossing projection 13 has a circular half-cut shape for positioning each core piece 10 at the time of lamination, and the half-punched projection fits with the half-punched circle of the next core piece 10 at the time of lamination. The positions of the upper and lower iron core pieces 10 are regulated by joining (for example, see
7648, etc.). For example, eleven pieces of the core pieces 10 are sequentially laminated to form a laminated core piece 20, and the laminated core pieces 20 are connected to form an annular core 21. For example, four annular iron cores 21 were sequentially stacked while being shifted by 30 ° from each other to form a 12-pole tooth stator iron core 30, and a pin 17 was driven into any of the through holes 14 and fixed to secure roundness. As a result, the conventional reinforcing meat pressure ring can be eliminated and 1
The thickness of the bipolar tooth stator core 30 could be reduced.
Although not shown, for example, a two-part type bobbin around which a winding is wound is sandwiched between the pole teeth 11 after lamination.

A 12-pole stator iron core 60 of a motor according to a second embodiment of the present invention in which iron core pieces 40 divided into three in the circumferential direction for every four pole teeth will be described. FIG. 4 is a plan view of the iron core piece 40 divided into three parts in the circumferential direction for every four pole teeth.
FIG. 5 is a plan view of a 12-pole tooth stator core 60 of the electric motor according to the second embodiment of the present invention. FIG. 6 shows that the annular cores 51 are
FIG. 13 is a partial perspective view of a 12-pole tooth stator core 60 (one according to the second embodiment) in a case where the 12-pole stator cores 60 are sequentially stacked while being shifted by 0 °. FIG. 7 is a partial perspective view of the 12-pole tooth stator core 61 (second of the second embodiment) when the annular cores 51 are sequentially stacked while being shifted by 60 ° from each other. For example, from a hot-rolled silicon steel sheet having a thickness of 0.35 mm, four pole teeth 41, a yoke part 42, and a projection part provided on the pole teeth 41 and / or the yoke part 42. 43, a through-hole 44 provided in the yoke portion 42,
The convex portion 4 provided at the right end (or the left end) of the yoke portion 42
5 and a concave portion 46 provided at a left end (or a right end) of the yoke portion 42 are cut. The embossing projection 43 has a semi-circular shape for positioning each core piece 40 during lamination, and the half-projected protrusion fits with the semi-circular circle for the next core piece 40 during lamination. The positions of the upper and lower core pieces 40 are regulated by the combination. For example, eleven pieces of the core pieces 40 are sequentially laminated to form a laminated core piece 50, and the laminated core pieces 50 are connected to form an annular core 51. For example, the four annular cores 51 are sequentially shifted by 30 ° or 60 ° from each other and laminated to form a 12-pole tooth stator core 60, and a pin 47 is driven into any through-hole 44 and fixed to fix the circularity. Secured. As a result, the conventional reinforcing meat pressure ring can be eliminated, and the thickness of the 12-pole stator iron core 60 can be reduced. Although not shown, the pole teeth 4 after lamination
For example, a two-part type bobbin around which a winding is wound is clamped to 1.

A description will be given of a 12-pole tooth stator core 90 of a motor according to a third embodiment of the present invention in which a core piece 70 divided into two pieces in the circumferential direction for every 6 pole teeth is employed. FIG. 8 is a plan view of the iron core piece 70 divided into two pieces in the circumferential direction for every six pole teeth.
FIG. 9 is a plan view of a 12-pole tooth stator core 90 of the motor according to the third embodiment of the present invention. FIG. 10 is a partial perspective view of a 12-pole tooth stator core 90 (one of the third embodiment) in the case where the annular cores 81 are sequentially stacked while being shifted by 30 ° from each other. FIG.
Reference numeral 1 denotes a 12-pole toothed stator core 91 in the case where the annular cores 81 are shifted from each other by 60 ° and stacked in order (second of the third embodiment).
FIG. FIG. 12 shows that the annular cores 81 are 9
It is a partial perspective view of 12 pole teeth stator core 92 (3rd Example 3) when it is laminated | stacked in order by shifting 0 degree. For example, from a hot-rolled silicon steel sheet having a thickness of 0.35 mm, six pole teeth 71, a yoke 72, and a projection formed on the pole teeth 71 and / or the yoke 72. 73, a through hole 74 provided in the yoke portion 72, a convex portion 75 provided at a right end (or a left end) of the yoke portion 72,
The core piece 70 having the concave portion 76 provided at the left end (or the right end) is cut. The embossing projection 73 has a circular half-cut shape for positioning each core piece 70 at the time of lamination, and the half-punched projection fits with the half-punched circle of the next core piece 70 at the time of lamination. The position of the upper and lower core pieces 70 is regulated by the combination. For example, eleven pieces of the core pieces 70 are sequentially laminated to form a laminated core piece 80, and the laminated core pieces 80 are connected to form an annular core 81. For example, four annular iron cores 81 are sequentially shifted by 30 °, 60 °, or 90 ° from each other and stacked to form a 12-pole tooth stator iron core 90, and fixed by driving a pin 77 into any of the through holes 74. Roundness was secured. As a result, the conventional reinforcing meat pressure ring can be eliminated, and the thickness of the 12-pole tooth stator core 90 can be reduced. Although not shown, for example, a two-part bobbin around which a winding is wound is clamped between the pole teeth 71 after lamination.

As described above, various combinations and the like of the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and a number of combinations are possible without departing from the spirit of the invention. Needless to say, combinations, modifications and the like can be made. For example, in order to make a stator core of a 24-pole tooth of an electric motor, it is divided into eight in the circumferential direction for every three pole teeth (or six in the circumferential direction for every four pole teeth, and four in the circumferential direction for every six pole teeth). The method can also be applied to a method of joining laminated iron core pieces divided into three in the circumferential direction for every eight pole teeth) and a method of joining annular iron cores.

[0012]

According to the present invention, the 12-pole stator core of the motor of the present invention can secure roundness without using a conventional reinforcing wall pressure ring, and can obtain good strength and tight-fitting connection with little distortion. Thereby, there is an effect that the magnetoresistance is reduced due to the improvement in the reduction of the joint gap, and the favorable electro-magnetic characteristics are improved.

[Brief description of the drawings]

FIG. 1 is a plan view of an iron core piece divided into four in the circumferential direction for each of three pole teeth.

FIG. 2 is a plan view of a 12-pole tooth stator core of the electric motor according to the first embodiment of the present invention.

FIG. 3 is a partial perspective view of a 12-pole tooth stator core of the electric motor according to the first embodiment of the present invention.

FIG. 4 is a plan view of an iron core piece divided into three in the circumferential direction for each four pole teeth.

FIG. 5 is a plan view of a 12-pole tooth stator core of the electric motor according to the second embodiment of the present invention.

FIG. 6 is a partial perspective view of a 12-pole tooth stator core of an electric motor according to a second embodiment of the present invention.

FIG. 7 is a partial perspective view of a 12-pole tooth stator core of a second electric motor according to a second embodiment of the present invention.

FIG. 8 is a plan view of an iron core piece divided into two in the circumferential direction for each six pole teeth.

FIG. 9 is a plan view of a 12-pole tooth stator core of the electric motor according to the third embodiment of the present invention.

FIG. 10 is a partial perspective view of a 12-pole tooth stator core of an electric motor according to a third embodiment of the present invention.

FIG. 11 is a partial perspective view of a 12-pole stator iron core of the second electric motor according to the third embodiment of the present invention.

FIG. 12 is a partial perspective view of a 12-pole tooth stator core of a third electric motor according to a third embodiment of the present invention.

[Explanation of symbols]

10 ... iron core piece, 11 ... pole teeth part, 12 ... yoke part, 13 ...
Projection, 14 ... Through-hole, 15: Convex, 16: Concave, 17
… Pin, 20… laminated core piece, 21… annular core, 30… stator core

Claims (3)

[Claims] An iron core divided into four in the circumferential direction for each of the three pole teeth is sequentially laminated to form a laminated iron core, and the laminated iron cores are connected to form an annular iron core. Or 6
A stator core for an electric motor, wherein a 12-pole tooth stator core is formed by sequentially laminating the stator core by shifting by 0 °, and a roundness is secured by driving a pin into a through hole provided in a yoke. 2. A laminated core piece is formed by sequentially laminating iron core pieces divided into three in the circumferential direction for each of the four pole teeth, and connecting the laminated core pieces to form an annular core. , 60
A stator core for a motor, characterized in that a 12-pole toothed stator core is laminated by being shifted at an angle of 90 ° or 90 °, and a pin is driven into a through hole provided in a yoke to ensure roundness. 3. A laminated core piece is formed by sequentially laminating core pieces divided into two in the circumferential direction for each of the six pole teeth, and connecting the laminated core pieces to form an annular core. , 60
An electric motor characterized in that a 12-pole tooth stator core is formed by laminating in order at an angle of 90 °, 90 °, 120 ° or 150 °, and a pin is driven into a through hole provided in a yoke to ensure roundness. Stator core.