JP2000078789A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stator capable of miniaturizing a motor. SOLUTION: The stator is formed in an annular shape by winding coils 11 on each pole Ts 9a of a stator core 9, which is laminated by a magnetic material and in which a plurality of yoke sections 9b are connected in a beltlike manner, respectively through insulating bobbins 10 while bending each connecting section. Coil-terminal joining terminals 13 joining the terminals of the coils 11 are arranged among the yoke sections 9b of the mutual adjacent insulating bobbins 10 and held by the insulating bobbins 10 at that time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator in which a coil is wound for each magnetic pole taste, such as for a DC brushless motor or a stepping motor, and more particularly to the arrangement and structure of connection terminals for connecting terminals of the coil. It is about.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a perspective view showing a configuration of a main part of a stator of a conventional motor disclosed in Japanese Unexamined Patent Publication. As shown in the figure, a conventional stator of this type is provided with a coil 3 via an insulating bobbin 2 to each magnetic pole tooth 1c of a stator core 1 laminated with a magnetic material and having a yoke 1a connected via a thin portion 1b.
The coil 3 is formed by bending each thin portion 1b (not shown) to form an annular shape.
The terminal 3a is processed by wrapping around a square pin 4 erected on the insulating bobbin 2, and the coil connecting wire 3b is hooked on the projection 2a of the insulating bobbin 2 and processed through the back of the insulating bobbin 2. As disclosed in JP-A-63-297934, the square pins 4 are joined to a connection board disposed above.

[0003]

As described above, the conventional stator has a square pin 4 for fastening the terminal 3a of the coil 3 as described above.
Are erected on the insulating bobbin 2 and the insulating substrate to which the square pins 4 are joined is further disposed upward, so that the size of the stator core 1 in the laminating direction increases, making it difficult to reduce the size of the motor. There was a problem that it is.

[0004] The present invention has been made to solve the above problems, and has as its object to provide a stator capable of reducing the size of a motor.

[0005]

According to a first aspect of the present invention, there is provided a stator in which coils are wound around respective magnetic pole teeth of a stator core laminated with a magnetic material and having a plurality of yoke portions connected in a strip shape via insulating bobbins. In the stator formed in an annular shape by turning and bending each connecting portion, the coil terminal joining terminal for connecting the terminal of the coil is arranged between the yoke portions of the adjacent insulating bobbins and held by the insulating bobbins. Things.

According to a second aspect of the present invention, in the first aspect of the present invention, the coil terminal joining terminal and the inter-terminal connecting conductor for connecting the coil terminal joining terminal are integrally formed by press punching and separated at a predetermined position. It was made.

According to a third aspect of the present invention, in the second aspect, a narrow section is formed at a position corresponding to the connecting portion of the stator core of the inter-terminal connecting conductor.

According to a fourth aspect of the present invention, there is provided the stator according to the second aspect, wherein the connector terminal connected to the inter-terminal connection conductor and interposed between the terminal and the outside is pressed with the coil terminal joining terminal and the inter-terminal connection conductor. It is designed to be integrally formed by punching.

According to a fifth aspect of the present invention, in the fourth aspect, the connector terminal is directed parallel to the stator core in an annular state with the connector terminal near the bent portion of the stator core in a direction opposite to the magnetic pole teeth. In such a case, a plurality of components are arranged at a predetermined angle in advance.

According to a sixth aspect of the present invention, there is provided a stator according to the first aspect, wherein the engaging portion is provided at a position on the opposite side of the insulating bobbin in the laminating direction from the side on which the coil terminal joining terminal is held. Is inverted at the engaging portion and connected to the coil terminal joining terminal.

According to a seventh aspect of the present invention, in the first aspect, the coil terminal joining terminal is bent toward the inner peripheral side of the stator after winding the coil.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a front sectional view showing a configuration of a motor to which a stator according to Embodiment 1 of the present invention is applied, FIG. 2 is a side sectional view showing a configuration of the motor in FIG. 1, and FIG. 3 is a stator in FIGS. 4 is a perspective view showing the configuration of the main part of FIG. 1, FIG. 4 shows the configuration of the stator core in FIG. 1, (A) is a plan view, and (B) is a front view. 5A and 5B show a state in which an insulating bobbin is mounted on the stator core in FIG. 4, wherein FIG. 5A is a plan view and FIG. 5B is a front view. FIG. 6 is a plan view showing a state in which a coil is wound around a stator core on which an insulating bobbin is mounted. FIGS. 7 and 8 are a front view and a side sectional view showing a method of connecting a terminal of the coil to a coil terminal joining terminal. .

In the drawing, reference numeral 5 denotes a rotating shaft supported by both bearings 6 and 7, 8 denotes a rotor fixed to the rotating shaft 5,
A stator core 9 is laminated with a magnetic material as shown in FIG. 4, and a plurality of yoke portions 9b paired with a magnetic pole tooth 9a are connected in a strip shape through a thin portion 9c. A stator core 9 is a stator core 9a of the stator core 9. Outer peripheral surface and yoke 9
An insulating bobbin 11 integrally formed of resin on the inner surface of b is a coil wound in the insulating bobbin 10 by a winding device 12.

Numeral 13 denotes coil terminal joining terminals which are connected to the terminals of each of the coils 11 by a fusing joining method which is carried out by applying pressure and applying current to the electrodes 14 as shown in FIGS. The insulating bobbin 10 is arranged between the yoke portions and is held by the insulating bobbin 10.
Reference numeral 15 denotes an inter-terminal connecting conductor connecting between the coil terminal joining terminals 12, and 16 denotes a connector terminal which is connected to the inter-terminal connecting conductor 15 and is interposed in connection with the outside. Then, by bending the thin portion 9c of the stator core 9,
A stator 17 is arranged annularly so as to surround the periphery of the rotor 8. Reference numeral 18 denotes a resin which integrally molds the stator 17 and each coil 11 by injection molding. For example, a thermoplastic resin such as polycarbonate or styrene resin, or a thermosetting resin such as unsaturated polyester is used.

Next, a method of manufacturing a motor to which the stator according to the first embodiment configured as described above is applied will be described. First, as shown in FIG.
The stator core 9 is formed by stacking a predetermined number of magnetic materials in which a plurality of yoke portions 9b paired with a are connected via a thin portion 9c in a strip shape, and performing squeezing. Next, as shown in FIG.
a, an insulating bobbin 1
0 is integrally molded. At this time, the coil terminal joining terminal 1
The one end 3 and the inter-terminal connection conductor 15 are also embedded in the insulating bobbin 10.

Next, as shown in FIG. 6, a winding is wound around each magnetic pole tooth 9a by a winding device 12 to form a coil 11. Next, as shown in FIGS. 7 and 8, the terminal of each coil 11 is sandwiched between the hook-shaped portions of the corresponding coil terminal joining terminal 13, and is pressed with a predetermined force by the electrode 14 and energized, that is, the fusing joining method. Connect with Next, each thin portion 9 of the stator core 9
By bending c, the stator 17 is formed in an annular shape so as to surround the rotor 8.
1 and 2, the stator 17 is integrally molded as shown in FIGS. 1 and 2 to complete the motor.

As described above, according to the first embodiment, the coil terminal joining terminal 13 to which the terminal of the coil 11 is connected is provided.
Is disposed between the yoke portions of the adjacent insulating bobbins 10 and one end is embedded and held in the insulating bobbin 10. Since the periphery of the terminal can be formed with almost no protrusion, the size of the stator can be reduced, and the motor can be downsized.

Embodiment 2 FIG. FIG. 9 shows a configuration of a main part of a stator according to a second embodiment of the present invention, where (A) is a plan view and (B) is a front view. 10 is a front view showing a state where the coil terminal joining terminal and the inter-terminal connecting conductor shown in FIG. 9 are incorporated in a stator, and FIG. 11 is a plan view showing a configuration of a connector terminal in a state where the stator is configured. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

Reference numeral 19 denotes an inter-terminal connecting conductor, 20 denotes a plurality of coil terminal connecting terminals branched from a predetermined position of the inter-terminal connecting conductor 19, and 21 denotes a coil terminal connecting terminal 20 of the inter-terminal connecting conductor 19. A cross-sectional narrow portion 22 formed near the branch, that is, at a position corresponding to the thin portion 9c of the stator core 9, is a notch formed at a predetermined position of the inter-terminal connecting conductor 19, and cuts the notch 22 portion. By doing so, as shown in FIG. 10, the inter-terminal connection conductor 19 is divided at a desired position.

Reference numeral 23 denotes a magnetic pole tooth 9a from a position corresponding to the thin portion 9c of the stator core 9 of the inter-terminal connection conductor 19.
A plurality of connector terminals are arranged in such a manner as to be oriented in a direction opposite to the above direction and to be inclined at a predetermined angle in advance so that the stator core 9 is parallel in the annular state as shown in FIG. The coil terminal joining terminal 20 and the connector terminal 23 are integrally formed by press punching.

As described above, according to the second embodiment, the coil terminal joining terminal 20 and the inter-terminal connecting conductor 19 for connecting the coil terminal joining terminal 20 can be integrally formed by press punching, and a predetermined position can be separated by the notch 22. As a result, the connection operation between the terminals of the coil 11 is facilitated, and the narrow section 21 is formed at a position corresponding to the thin portion 9c of the stator 9, so that the terminal can be bent according to the bending of the stator 9. Since the inter-connection conductor 19 can also be easily bent, the force applied to the insulating bobbin 10 on which the inter-terminal connection conductor 19 is integrally formed is reduced, and it is not necessary to particularly increase the mechanical strength of the insulated bobbin 10. Is prevented.

Further, since the connector terminal 23 is integrally formed with the coil terminal joining terminal 20 and the inter-terminal connecting conductor 19 by press punching, not only the connection operation between the terminals of the coil 11 but also the external connection operation is easy. Furthermore, the connector terminals 23 are oriented in the direction opposite to the magnetic pole teeth 9a, and the inter-terminal connection conductors 19 are bent in advance by a predetermined angle so that the stator core 9 is parallel in an annular state. Since the connector terminal 23 is inclined, the connector terminal 23 can be easily connected to the outside, and the size of the connector terminal 23 can be reduced, and the assembling workability can be improved.

Embodiment 3 FIG. FIG. 12 is a front view showing a configuration of a main part of a stator according to Embodiment 3 of the present invention, and FIG. 13 is a front view showing a different configuration compared to FIG. In the figure, the same parts as those in the second embodiment are denoted by the same reference numerals, and the description is omitted. Reference numeral 24 denotes an engaging portion formed so that the terminal of the coil 11 can be engaged with the insulating bobbin 10 at a position opposite to the side where the coil terminal joining terminal 20 is held in the stacking direction. After being inverted at the engagement portion 24, the connection is made to the coil terminal joining terminal 20.

As described above, according to the third embodiment, the engaging portion 24 is formed at a position on the opposite side of the insulating bobbin 10 in the laminating direction from the side where the coil terminal joining terminal 20 is held, and After the terminal is inverted by the engaging portion 24, the terminal is connected to the coil terminal joining terminal 20. For example, when the terminal of the coil 11 is directly connected to the coil terminal joining terminal 20 as shown in FIG. When the stator core 9 is bent in an annular shape, such a situation that the terminal interferes with the adjacent coil 11 or is pinched between the bent portions of the stator core 9 can be avoided, and the assembling workability can be improved. it can.

Embodiment 4 FIG. 14 is a plan view showing a part of a configuration of a main part of a stator according to a fourth embodiment of the present invention, with a part cut away, FIG. 15 is a plan view showing one step of a method of manufacturing the stator in FIG. 14, and FIG. FIG. 14 is a plan view showing a step different from that of FIG.
FIG. 17 is a plan view showing a step different from FIG. 15 of the method for manufacturing the stator in FIG. 14. As is apparent from the figure, the stator 25 in the fourth embodiment has substantially the same configuration as the stator 17 in the first embodiment, and the coil terminal joining terminals 13 are bent to the inner peripheral side of the stator 25. The only difference is that

Next, a method of manufacturing the stator according to the fourth embodiment will be described. First, as in the first embodiment, the coil 11 is wound around each magnetic pole tooth 9a of the stator core 9 as shown in FIG. 15, and the terminal of the coil 11 is connected to the corresponding coil terminal joining terminal 13. Next, as shown in FIG. 16, the bending jig 26 is moved in the direction of the arrow in the figure, and the coil terminal joining terminal 13 is pressed by each projection 26a, whereby the stator 25 is bent toward the inner peripheral side of the stator 25 as shown in FIG. Then, as shown in FIG. 14, the stator 25 is completed by bending the stator core 9 to form an annular shape.

As described above, according to the fourth embodiment, the coil terminal joining terminal 13 is bent toward the inner peripheral side of the stator 25 after the coil 11 is wound.
Terminal of coil 11, stator core 9a and coil 11
, An insulation distance between them can be easily secured, and electrical performance can be improved.

In each of the first to fourth embodiments, the stator core 9 is connected via the thin portion 9c. However, the present invention is not limited to this. It is needless to say that the same effects as described above can be exerted even when applied to a linked object.

[0029]

As described above, according to the first aspect of the present invention, the coils are wound around the respective magnetic pole teeth of the stator core, which is laminated with a magnetic material and has a plurality of yoke portions connected in a belt shape, through the insulating bobbin. In a stator formed by turning and bending each connecting portion to form an annular shape, coil terminal joining terminals for connecting terminals of the coil are arranged between the yoke portions of adjacent insulating bobbins and held by the insulating bobbins. As a result, it is possible to provide a stator capable of downsizing the motor.

According to a second aspect of the present invention, in the first aspect, the coil terminal joining terminal and the inter-terminal connecting conductor connecting between the coil terminal joining terminal are integrally formed by press punching so as to be appropriately separated at a predetermined position. As a result, it is possible to provide a stator capable of simplifying the connection work between the coil terminals and improving the assembly workability, as well as reducing the size of the motor.

According to a third aspect of the present invention, in the second aspect, the narrow section is formed at a position corresponding to the connecting portion of the stator core of the inter-terminal connecting conductor.
It is possible to provide a stator capable of facilitating bending of the inter-terminal connection conductor and reducing the force applied to the insulating bobbin.

According to a fourth aspect of the present invention, in the second aspect, the connector terminal connected to the inter-terminal connection conductor and interposed in the connection with the outside is stamped out with the coil terminal joining terminal and the inter-terminal connection conductor. As a result, the stator can be easily connected to the outside.

According to a fifth aspect of the present invention, in the fourth aspect, the stator core is parallel to the annular state with the connector terminal directed in the direction opposite to the magnetic pole teeth near the bent portion of the stator core. As described above, since a plurality of the terminals are arranged at a predetermined angle in advance, it is possible to provide a stator in which the connector terminals can be easily connected to the outside.

According to a sixth aspect of the present invention, in the first aspect, an engaging portion is provided at a position on the opposite side of the insulating bobbin in the laminating direction from the side on which the coil terminal joining terminal is held, and the coil bobbin is provided. Since the terminal is inverted by the engaging portion and connected to the coil terminal joining terminal, it is possible to provide a stator capable of preventing interference with an adjacent coil or being caught in a bent portion of the stator core. it can.

According to the seventh aspect of the present invention, in the first aspect, the coil terminal joining terminal is bent toward the inner peripheral side of the stator after winding the coil, so that the electrical performance is improved. Capable of providing the stator.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a configuration of a motor to which a stator according to a first embodiment of the present invention is applied.

FIG. 2 is a side sectional view showing a configuration of the motor in FIG.

FIG. 3 is a perspective view showing a configuration of a main part of a stator in FIGS. 1 and 2;

FIG. 4 shows a configuration of a stator core in FIG. 1,
(A) is a plan view and (B) is a front view.

5 shows a state in which an insulating bobbin is mounted on the stator core in FIG. 4, (A) is a plan view, and (B) is a front view.

FIG. 6 is a plan view showing a state where a coil is wound around a stator core on which an insulating bobbin is mounted.

FIG. 7 is a front view showing a method of connecting a terminal of a coil to a coil terminal joining terminal.

FIG. 8 is a side sectional view showing a method of connecting a terminal of a coil to a coil terminal joining terminal.

FIG. 9 shows a configuration of a main part of a stator according to a second embodiment of the present invention, where (A) is a plan view and (B) is a front view.

10 is a front view showing a state where the coil terminal joining terminal and the inter-terminal connecting conductor shown in FIG. 9 are incorporated in a stator.

FIG. 11 is a plan view showing a configuration of a connector terminal in a state where a stator is configured.

FIG. 12 is a front view showing a configuration of a main part of a stator according to a third embodiment of the present invention.

FIG. 13 is a front view showing a configuration different from that of FIG. 13;

FIG. 14 is a plan view, partially broken away, of a configuration of a main part of a stator according to a fourth embodiment of the present invention.

FIG. 15 is a plan view showing one step of a method for manufacturing a stator in FIG. 14.

16 is a view showing a method of manufacturing the stator shown in FIG. 14; FIG.
It is a top view which shows the process different from 5.

17 is a view showing a method of manufacturing the stator shown in FIG. 14; FIG.
It is a top view which shows the process different from 5 further.

FIG. 18 is a perspective view showing a configuration of a main part of a stator of a conventional motor.

[Explanation of symbols]

8 rotor, 9 stator core, 9a magnetic pole taste,
9b yoke part, 9c thin part, 10 insulating bobbin, 1
1 coil, 13, 20 coil terminal joining terminal, 15,
19 terminal connection conductor, 16, 23 connector terminal, 1
7, 25 Stator, 21 narrow section, 24 engaging section.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenichi Azuma 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Mikihiko Suzuki 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Rishi Electric Co., Ltd. (72) Inventor Minoru Hirota 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5H002 AA07 AB01 AE08 5H604 AA08 BB01 BB17 CC01 CC05 CC13 PB03 QB03

Claims (7)

[Claims] 1. A coil is wound around each magnetic pole tooth of a stator core laminated with a magnetic material and a plurality of yoke portions are connected in a belt shape via an insulating bobbin, and each of the connecting portions is bent to form an annular shape. In the stator described above, a coil terminal joining terminal for connecting a terminal of the coil is arranged between the yoke portions of the adjacent insulating bobbins and held by the insulating bobbins. 2. The stator according to claim 1, wherein the coil terminal joining terminal and the inter-terminal connecting conductor connecting the coil terminal joining terminal are integrally formed by press punching and separated at a predetermined position as appropriate. 3. The stator according to claim 2, wherein a narrow section is formed at a position of the inter-terminal connecting conductor corresponding to the connecting portion of the stator core. 4. The connector terminal according to claim 2, wherein the connector terminal connected to the inter-terminal connecting conductor and interposed in the connection with the outside is formed integrally with the coil terminal joining terminal and the inter-terminal connecting conductor by press punching. Stator. 5. A plurality of connector terminals are arranged in the vicinity of a bent portion of the stator core in such a manner that the stator cores are inclined at a predetermined angle in advance so as to be parallel to each other in an annular state with a direction opposite to the magnetic pole teeth. The stator according to claim 4, wherein 6. An insulating bobbin is provided with an engaging portion at a position opposite to a side in which a coil terminal joining terminal is held in a laminating direction, and a terminal of the coil is inverted by the engaging portion to be connected to the coil terminal joining terminal. 2. The stator according to claim 1, wherein the stator is connected. 7. The coil terminal joining terminal is bent to the inner peripheral side of the stator after winding the coil.
The stator as described.