WO2021146833A1

WO2021146833A1 - Laminated iron core fixing structure

Info

Publication number: WO2021146833A1
Application number: PCT/CN2020/073176
Authority: WO
Inventors: 五十子直之
Original assignee: 浙江川电钢板加工有限公司
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2021-07-29
Also published as: CN114175465A; JP2022521111A; CN114175465B; WO2021147881A1; JP7277564B2

Abstract

Provided is a laminated iron core fixing structure for the armature of a rotating electric motor having a laminated iron core having high magnetic conductivity and low iron loss. The laminated iron core fixing structure is configured to have a winding portion formed of laminated, unconnected steel plates, and an insulator that fixes the laminated steel plates by means of assembly to the winding portion.

Description

Laminated iron core fixing structure

Technical field

The present invention relates to a laminated iron core fixing structure, and more specifically, to a laminated iron core fixing structure that fixes a monolithic or separate laminated iron core composed of laminated steel plates so as not to spread out.

Background technique

The armature (that is, the stator, the rotor, etc.) of a rotating electric machine (that is, a motor, a generator, etc.) composed of a laminated iron core composed of laminated steel plates is known. Among the laminated cores, there are the monolithic laminated cores described in

Patent Documents

1 and 2 and the split laminated cores as described in Patent Document 3, the monolithic laminated cores having a ring-shaped monolithic yoke and A plurality of winding parts, also called teeth, slots, etc., protrude radially from the integral yoke. The split laminated core has a split yoke that forms a part of the integral yoke and a split yoke. At least one protruding winding part.

In the case of using a monolithic laminated iron core, a monolithic laminated iron core assembly is formed by assembling an insulator to the winding part of the monolithic laminated iron core, and a wire is wound on the insulator of the monolithic laminated iron core assembly, etc. The conductor forms an integral armature, and the integral armature forms a rotating electric machine. In the case of using a split laminated iron core, a split laminated iron core assembly is formed by assembling an insulator to the winding portion of the split laminated iron core. After that, for example, a rotating electric machine is formed through a process of forming a split armature by winding a conductor on an insulator of each split laminated iron core assembly, and arranging the split armatures in a ring shape.

Regardless of the integral type and the split type, the laminated iron core is generally formed by joining laminated steel plates by joining means such as welding, rivet riveting, and bonding.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent Application Publication No. 2015-136241

Patent Document 2: Japanese Patent Application Publication No. 2002-233090

Patent Document 3: International Publication No. 2008/099659

Summary of the invention

The problem to be solved by the invention

In order to obtain a high-efficiency, high-output rotating electric machine, a laminated iron core with high magnetic permeability and low iron loss is required. However, the welding, rivet riveting, bonding and other joining methods as described above may cause magnetic permeability due to deformation caused by welding, rivet riveting, damage to the insulating layer, and the interposition of adhesives as dissimilar materials. Decline and rise of iron loss. Therefore, it would be preferable to provide a laminated iron core fixing structure that can prevent the laminated steel plates from spreading without joining the laminated steel plates.

In view of the above-mentioned problems, the present invention aims to provide a laminated iron core fixing structure capable of realizing an armature of a rotating electric machine having a laminated iron core with high magnetic permeability and low iron loss.

Methods used to solve the problem

The gist of the present invention is as follows.

1. A laminated iron core fixing structure, comprising: a winding part formed of a laminated steel plate in a non-joined state; and an insulator for fixing the laminated steel plate by assembling the winding part.

2. The laminated iron core fixing structure according to the above 1., wherein the insulator has two end surface walls extending along both end surfaces of the winding portion in the lamination direction, and between the two end surface walls along the The two side walls extending from both sides of the winding part.

3. The laminated iron core fixing structure described in 2. above, wherein the two side walls are each constituted by two divided walls connected via a locking portion that is locked to each other in the stacking direction of the winding portion.

4. The laminated iron core fixing structure according to the above 3., wherein the dividing wall extending from one of the two end surface walls is in the winding portion compared to the dividing wall as the connection target. Shorter in the stacking direction.

5. The laminated iron core fixing structure according to the above 4., wherein the dividing wall extending from the one of the two end surface walls is respectively located at the locking portion from one remote from the winding portion The side overlaps with the dividing wall that is the object of connection.

Invention effect

According to the present invention, it is possible to provide a laminated iron core fixing structure capable of realizing an armature of a rotating electric machine having a laminated iron core with high magnetic permeability and low iron loss.

Description of the drawings

Fig. 1 is a perspective view showing a monolithic laminated iron core assembly having a laminated iron core fixing structure according to a first embodiment of the present invention in a state before assembly.

Fig. 2 is a perspective view showing the integrated laminated core assembly shown in Fig. 1 in an assembled state.

Fig. 3 is a perspective view showing a split laminated iron core assembly having a laminated iron core fixing structure according to a second embodiment of the present invention in a state before assembly.

Fig. 4 is a perspective view showing the split laminated iron core assembly shown in Fig. 3 in an assembled state.

Fig. 5 is a cross-sectional view of the side wall shown in Fig. 2 or Fig. 4.

Detailed ways

Hereinafter, embodiments of the present invention will be exemplified and described with reference to the drawings.

First, referring to FIGS. 1, 2 and 5, the laminated core fixing structure of the first embodiment of the present invention will be exemplified and described.

As shown in Figs. 1 to 2, the laminated iron core fixing structure 1 of the present embodiment has a monolithic laminated iron core 3 composed of laminated steel plates 2 in a non-joined state. The laminated core 3 has a ring-shaped integral yoke 4 and a plurality of winding parts 5 which are also called teeth, grooves, etc., which protrude radially inward from the yoke 4. In this way, the laminated iron core 3 has a plurality of winding portions 5 formed of the laminated steel plates 2 in the non-joined state. In addition, the laminated iron core fixing structure 1 has an insulator 6 that fixes the laminated steel plate 2 by fitting to the plurality of winding parts 5. It should be noted that although the yoke 4 is annular, it is not limited to this. In addition, although nine winding parts 5 are provided, the number of winding parts 5 can be changed suitably. It should be noted that, in FIGS. 1 to 2, only one winding part 5 is given a code. The insulator 6 is formed of, for example, synthetic resin, and has insulating properties.

The laminated iron core fixing structure 1 has a structure in which the non-joined laminated steel plates 2 are fixed so as not to be scattered by the insulator 6, so it can achieve high magnetic permeability and low iron loss without adding special components or processes. The laminated iron core 3 is the armature of the rotating electric machine. In addition, since joining means such as welding, rivet riveting, and bonding for the conventionally used laminated steel plates 2 are not required, it is possible to enjoy the effects of simplification of the manufacturing process and reduction of manufacturing cost. In addition, although each winding part 5 protrudes radially inward from the yoke 4, it is not limited to this, The structure which protrudes radially outward from the yoke 4 may be sufficient. In addition, although the laminated iron core 3 is a laminated iron core for a stator as an armature in a motor as a rotating electric machine, it is not limited to this.

The insulator 6 has a fitting part 7 to be fitted to the winding part 5 with respect to each winding part 5. Each fitting portion 7 has two end surface walls 8 extending along both end surfaces of the winding portion 5 in the stacking direction, and two side walls 9 extending along both side surfaces of the winding portion 5 between the two end surface walls 8. Therefore, by wrapping the surrounding wire portion 5 with the two end face walls 8 and the two side walls 9, it is possible to more reliably fix the laminated steel plate 2 in the non-joined state. In addition, it is possible to ensure good insulation between a conductor (not shown) such as an electric wire wound around the mounting portion 7 of the insulator 6 in order to form an armature and the winding portion 5. It should be noted that, in FIGS. 1 to 2, only one mounting portion 7 and the end wall 8 and side wall 9 constituting the mounting portion 7 are given reference numerals. It should be noted that the structure of the mounting portion 7 is not limited to this.

As shown in Fig. 5, in each mounting portion 7, each side wall 9 is composed of two divided walls 11 connected via a locking portion 10 that is locked to each other in the stacking direction of the winding portion 5. As shown in FIG. That is, each mounting portion 7 is composed of two divided mounting portions 12 composed of an end surface wall 8 and two divided walls 11, and the two divided mounting portions 12 are connected to each other via the locking portion 10. In addition, the insulator 6 has a connecting portion 13 that connects all the divided assembly portions 12 arranged in the circumferential direction. That is, the insulator 6 is composed of two divided insulators 14. Therefore, it is possible to form a monolithic laminated iron core assembly 15 as shown in FIG. 2 by a simple step of sandwiching the laminated iron core 3 using only these divided insulators 14. It should be noted that the illustration of the locking portion 10 is omitted in FIGS. 1 to 2. The locking portion 10 may be provided on each side wall 9 continuously or intermittently over the entire width, or may be provided on each side wall 9 only in a part of the width. It should be noted that the insulator 6 is not limited to this. For example, it may be composed of two or more divided parts, and the connecting portion 13 may not be provided. In addition, the structure of the mounting portion 7 is not limited to this.

As shown in FIGS. 1 to 2, in each of the mounting portions 7, the dividing wall 11 extending from one 8a of the two end surface walls 8 is in the lamination direction of the winding portion 5 compared to the dividing wall 11 as the connection target. The upper form is shorter. That is, in each of the fitting parts 7, the dividing wall 11 in one 12a of the two dividing fitting parts 12 is formed shorter in the stacking direction of the winding part 5 than the dividing wall 11 as the connection target. . Therefore, when the laminated core assembly 15 is transported, for example, by supporting the other 12b of the two divided assembly parts 12 in each assembly part 7 instead of one of the two parts 12a, it is possible to reduce the number of parts from the supporting side. The other part 12b of the two divided assembly parts 12 exceeds the amount of the laminated steel plate 2, so it is possible to reduce a part of the excess non-joined state of the laminated steel plate 2 that acts on the locking part 10 by inertia force, gravity, etc., accompanying transportation. . Therefore, the locked state of the locking portion 10 can be maintained well, and the fixed state of the laminated steel plate 2 can be maintained well. It should be noted that the structure of the mounting portion 7 is not limited to this.

In each mounting portion 7, the dividing wall 11 extending from one 8a of the two end surface walls 8 may be connected to the dividing wall 11 as the object of connection at the locking portion 10 from the side away from the winding portion 5. It is composed in an overlapping manner. According to such a structure, one of the two divided walls 11 connected to each other, which is shorter and less susceptible to flexural deformation, overlaps with the other divided wall 11 from the outside of the winding portion 5, so that the locking can be improved. The locking force of the part 10 maintains the fixed state of the laminated steel plate 2 more satisfactorily.

Each side wall 9 has an engaging portion 16 composed of locking portions 10 that are locked to each other. In each of the engaging parts 16, the locking parts 10 that are locked to each other are constituted by claws 17, respectively. The claws 17 are respectively composed of a first inclined surface 18 that reduces the thickness of the side wall 9 toward the front end, a locking surface 19 protruding from the front end of the first inclined surface 18 in the thickness direction, and a side surface from the protruding end of the locking surface 19 The wall 9 is constituted by a second inclined surface 20 whose thickness decreases toward the front end. With such a structure, the locking portions 10 can be smoothly locked to each other. It should be noted that the structure of the claw 17 is not limited to this. In addition, the engaging portion 16 is not limited to being constituted by the claw 17.

It should be noted that although each winding portion 5 has a shape having an enlarged portion 21 having a circumferential width expanded at the radially inner end as shown in FIG. 1, the shape of the winding portion 5 is not limited to this, for example Each winding portion 5 may have a shape having a fixed circumferential width in the radial direction. It should be noted that, in FIG. 1, only one enlarged portion 21 is marked with a reference number. In addition, although each fitting portion 7 has a shape in which the width in the circumferential direction is expanded so that the radially inner end follows the enlarged portion 21 of the winding portion 5, the shape of the fitting portion 7 is not limited to this, and can be fitted to the winding portion 5 Change the shape appropriately.

Next, referring to FIGS. 3 to 5, the laminated core fixing structure of the second embodiment of the present invention will be exemplified and described.

As shown in FIGS. 3 to 4, the laminated iron core fixing structure 1 of the present embodiment has a split laminated iron core 3 composed of laminated steel plates 2 in a non-joined state. The laminated core 3 has a split yoke 4 and a plurality of winding parts 5 that are also called teeth, grooves, etc., protruding from the yoke 4. In this way, the laminated iron core 3 has the winding portion 5 formed of the laminated steel plates 2 in the non-joined state. In addition, the laminated iron core fixing structure 1 has an insulator 6 that fixes the laminated steel plate 2 by fitting to the winding portion 5. It should be noted that, in FIGS. 3 to 4, the same reference numerals are given to members corresponding to the members shown in FIGS. 1 to 2. The insulator 6 is formed of, for example, synthetic resin, and has insulating properties.

The laminated iron core fixing structure 1 has a structure in which the non-joined laminated steel plates 2 are fixed so as not to be scattered by the insulator 6, so it can achieve high magnetic permeability and low iron loss without adding special components or processes. The laminated iron core 3 is the armature of the rotating electric machine. In addition, since joining means such as welding, rivet riveting, and bonding for the conventionally used laminated steel plates 2 are not required, it is possible to enjoy the effects of simplification of the manufacturing process and reduction of manufacturing cost. In addition, although the laminated iron core 3 is a laminated iron core for the stator as an armature in the electric motor which is a rotating electrical machine, it is not limited to this.

The insulator 6 has a fitting part 7 fitted to the winding part 5. In addition, although the laminated iron core 3 has one winding part 5, it is not limited to this, You may have two or more winding parts 5. In addition, although the insulator 6 has one mounting portion 7, it is not limited to this, and it may have two or more mounting portions 7 according to the number of the winding portions 5.

The fitting portion 7 has two end surface walls 8 extending along both end surfaces of the winding portion 5 in the stacking direction, and two side walls 9 extending along both side surfaces of the winding portion 5 between the two end surface walls 8. Therefore, by wrapping the surrounding wire portion 5 with the two end face walls 8 and the two side walls 9, it is possible to more reliably fix the laminated steel plate 2 in the non-joined state. In addition, it is possible to ensure good insulation between a conductor (not shown) such as an electric wire wound around the mounting portion 7 of the insulator 6 in order to form an armature and the winding portion 5. It should be noted that the structure of the mounting portion 7 is not limited to this.

As shown in FIG. 5, each side wall 9 is composed of two divided walls 11 connected via a locking portion 10 that is locked to each other in the stacking direction of the winding portion 5. That is, the mounting portion 7 is composed of two divided mounting portions 12 constituted by the end face wall 8 and the two divided walls 11, and the two divided mounting portions 12 are connected to each other via the locking portion 10. In addition, the insulator 6 is composed of two divided insulators 14. Therefore, by a simple step of sandwiching the laminated iron core 3 with these divided insulators 14, the split laminated iron core assembly 15 as shown in FIG. 4 can be formed. It should be noted that, in FIGS. 3 to 4, the illustration of the locking portion 10 is omitted. The locking portion 10 may be provided on each side wall 9 continuously or intermittently over the entire width, or may be provided on each side wall 9 only in a part of the width. It should be noted that the structure of the mounting portion 7 is not limited to this.

As shown in FIGS. 3 to 4, the dividing wall 11 extending from one 8a of the two end surface walls 8 is formed to be shorter in the stacking direction of the winding portion 5 than the dividing wall 11 to be connected. That is, the dividing wall 11 in one 12a of the two divided mounting parts 12 is formed shorter in the stacking direction of the winding part 5 than the dividing wall 11 as the connection object, respectively. Therefore, when the laminated iron core assembly 15 is transported, for example, by supporting the other 12b of the two divided assembly parts 12 instead of one of the 12a, it is possible to reduce the amount of transmission from the two divided assembly parts 12 serving as the supporting side. By the amount of the laminated steel plate 2 that the other 12b exceeds, it is possible to reduce the force acting on the locking portion 10 by inertial force, gravity, etc., with a part of the laminated steel plate 2 in the non-joined state of the excess. Therefore, the locked state of the locking portion 10 can be maintained well, and the fixed state of the laminated steel plate 2 can be maintained well. It should be noted that the structure of the mounting portion 7 is not limited to this.

The dividing wall 11 extending from one 8a of the two end surface walls 8 may be configured so as to overlap the dividing wall 11 as the connection target from the side away from the winding portion 5 at the locking portion 10. According to such a structure, one of the two divided walls 11 connected to each other, which is shorter and less susceptible to flexural deformation, overlaps with the other divided wall 11 from the outside of the winding portion 5, so that the locking can be improved. The locking force of the part 10 maintains the fixed state of the laminated steel plate 2 more satisfactorily.

It should be noted that although the winding portion 5 has a shape having an enlarged portion 21 whose circumferential width is enlarged at the radially inner end as shown in FIG. 3, the shape of the winding portion 5 is not limited to this, for example, The winding part 5 may have a shape having a fixed circumferential width in the radial direction. It should be noted that although the fitting portion 7 has a shape in which the radially inner end follows the enlarged portion 21 of the winding portion 5, the circumferential width is expanded, but the shape of the fitting portion 7 is not limited to this, and can be fitted to the winding portion. The shape of 5 is appropriately changed.

It should be noted that in the laminated core fixing structure 1 of the first and second embodiments described above, the shorter one of the two divided walls 11 and the longer one of the two divided walls 11 connected to each other The length ratio of 11 is, for example, 1:4, but it is not limited to this. In addition, in the laminated iron core fixing structure 1 of the aforementioned first and second embodiments, the thickness T of each side wall 9 is, for example, 0.5 mm. In this case, the side wall 9 at each locking surface 19 The width W in the thickness direction of is, for example, 0.20 to 0.25 mm. In addition, the laminated iron core fixing structure 1 of the first embodiment and the second embodiment has been described by taking a case where a stator of an air-conditioning motor is configured as an example. However, its use is not limited to air conditioners, and the above-mentioned laminated core fixing structure 1 can be used to construct armatures of various uses and sizes.

As mentioned above, although this embodiment was illustrated and demonstrated, this invention is not limited to this, It can change suitably in a claim.

Label description

1 Laminated iron core fixing structure

2 Laminated steel plate

3 Laminated iron core

4 Magnetic yoke

5 Winding part

6 Insulator

7 Assembly Department

8 End wall

8a One of the two end walls

9 Side wall

10 Carding Department

11 partition wall

12 Split assembly department

12a One of the two split assembly parts

12b The other of the two split assembly parts

13 Connection part

14 Split insulator

15 Laminated iron core assembly

16 Card coupling

17 claws

18 The first inclined plane

19 Carding

20 The second inclined surface

21 Expansion Department

T thickness

W width

Claims

A fixed structure of laminated iron core, which has:

The winding part is formed of laminated steel plates in a non-joined state; and

The insulator fixes the laminated steel plate by being fitted to the winding part.
The laminated iron core fixing structure according to claim 1, wherein:

The insulator has two end surface walls extending along both end surfaces of the winding portion in the stacking direction, and two side walls extending along both side surfaces of the winding portion between the two end surface walls.
The laminated iron core fixing structure according to claim 2, wherein:

The two side walls are each constituted by two divided walls connected via locking portions that are locked to each other in the stacking direction of the winding portion.
The laminated iron core fixing structure according to claim 3, wherein:

The dividing wall extending from one of the two end surface walls is each shorter in the stacking direction of the winding portion than the dividing wall as the connection target.
The laminated iron core fixing structure according to claim 4, wherein:

The dividing wall extending from the one of the two end surface walls overlaps with the dividing wall as a connection target at the locking portion from a side away from the winding portion.