JP2001275284A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a motor, e.g. a DC brushless motor, having a salient pole concentrated coil and an outer rotor in which the space factor of the coil is enhanced by improving the yield of material of a stator coil without increasing the reluctance thereby facilitating the winding of the coil. SOLUTION: The motor comprises a stator 13 where a plurality of salient poles 17 fixed with a bobbin 16 applied with a coil 15 are bonded to the outer circumference of a yoke 14. The salient pole 17 has a concentric arcuate part 17b provided at a rectangular prism part 17a being inserted into the bobbin 16, and a semicircular groove 17C. The concentric arcuate part 17b touches the outer circumference of the yoke 14 and the semicircular groove 17c is fitted to the yoke 14 and bonded thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor such as a DC brushless motor having salient pole concentrated winding coils and an outer rotor.

[0002]

2. Description of the Related Art Conventionally, this type of motor is shown in FIGS.
It was configured as shown in FIG. Hereinafter, the configuration will be described.

As shown in the figure, a stator core 1 has a shape in which a salient pole 1a and a yoke 1b are integrated, and is divided into the stator core 1 in an axial direction of a motor or directly formed and mounted on the stator core 1. The coil 4 is wound directly around the bobbin 2 thus formed to form the stator 4. In addition,
A hole 5 for motor assembly is provided in the yoke 1b.

The rotor 6 has a magnet 7 facing the salient pole 1 a of the stator 4, and a bearing 9 is fixed to a shaft 8 holding the rotor 6. The bearing 9 is supported by a bearing housing 10 fitted to the inner diameter of the yoke 1b. The bearing housing 10 is fixed to the stator 4 with screws 12 together with a housing holding plate 11.

[0005]

In such a conventional configuration, since the coil 3 is wound directly on the bobbin 2 mounted on the stator core 1, the operation is difficult, and the gap between the coils 3 is uneven. In addition, the space factor is low, the connection between the coils 3 is difficult, the material removal of the stator core 1 is poor, the gap between the coils 3 through which the cooling air passes is narrowed, and the cooling effect is deteriorated.

An object of the present invention is to solve the above-mentioned conventional problems and to improve the material removal of the stator core without increasing the magnetic resistance, to facilitate the winding of the coil, and to improve the space factor of the coil. And

[0007]

In order to achieve the above object, the present invention comprises a stator having a plurality of salient poles fixed to a bobbin around which a coil is wound around an outer periphery of a yoke, wherein the salient poles are attached to the bobbin. It has a concentric arc portion and a semicircular groove portion provided in a rectangular parallelepiped portion to be inserted. The concentric arc portion is in contact with the outer periphery of the yoke, and the semicircular groove portion is fitted to the yoke and fixed to the yoke.

Thus, the stator core can be formed with good material removal without increasing the magnetic resistance, and the winding of the coil can be facilitated, and the space factor of the coil can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention comprises a stator having a plurality of salient poles mounted on a periphery of a yoke and having a bobbin wound with a coil mounted thereon, wherein the salient poles comprise A concentric circular arc portion and a semicircular groove portion provided in a rectangular parallelepiped portion to be inserted into the yoke, the concentric circular arc portion is in contact with the outer periphery of the yoke, and the semicircular groove portion is fitted to the yoke and fixed to the yoke. The stator core can be formed without increasing magnetic resistance by fitting a concentric arc portion provided in a rectangular parallelepiped portion of the salient pole to the outer periphery of the yoke, and fitting a semicircular groove portion with the yoke. The material can be easily removed, and the bobbin around which the coil is wound is inserted into the rectangular parallelepiped portion of the salient pole, so that the coil can be easily wound and the space factor of the coil can be improved. .

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a printed circuit board for connecting a coil mounted on a plurality of salient poles, and the end of the coil wound on a bobbin around the printed circuit board. The parts are inserted and soldered, and the coils respectively mounted on the plurality of salient poles can be connected via a printed circuit board, so that the connection between the coils can be facilitated.

According to a third aspect of the present invention, in the first aspect of the present invention, a bearing fixed to a shaft holding the rotor and a bearing plate insulated from the bearing are fitted to the inner diameter of the yoke. An insulating bearing housing and a housing retainer plate abutting against the insulating bearing abutment plate, wherein the bearing housing and the housing retainer plate are screwed to the yoke to support a bearing, and The bearing and the stator core can be insulated from each other by the flexible bearing housing and the insulating bearing plate, and the insulation performance can be improved. Furthermore, since the motor can be operated alone, the performance was confirmed. Later, it can be assembled to the fuselage.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1 and FIG.
3, a plurality of salient poles 17 on which a bobbin 16 around which a coil 15 is wound are fixedly attached to the outer periphery of a yoke 14, and the salient poles 17 are rectangular parallelepiped portions inserted into the bobbin 16, as shown in FIG. A concentric arc 17b is provided at the end of 17a, and a semicircular groove 17c is provided near the concentric arc 17b.

As shown in FIG. 4, the yoke 14 is provided with a hole 18 for assembling a motor, and an arc-shaped projection 14a which is in contact with a concentric arc 17b of the salient pole 17 is provided outside the hole 18 for assembling the motor. The protrusion 1 is located near the arc-shaped protrusion 14a.
4b is provided.

The coil 15 is attached to the rectangular parallelepiped portion 17a of the salient pole 17.
5, the concentric arc 17b is brought into contact with the arc-shaped protrusion 14a of the yoke 14, and the semicircular groove 17c is fitted with the protrusion 14b of the yoke 17, as shown in FIG. And fixed to the yoke 14. At this time, the bobbin 16 around which the coil 15 is wound
It is held by the character 17d and the outermost periphery of the yoke 14.

The printed circuit board 19 connects the coil 15 mounted on the salient pole 17, and the coil 15 is attached to the bobbin 16.
Is fixed, and this terminal 20 is inserted into the printed circuit board 19 and soldered to form a plurality of salient poles 1.
The coils 15 respectively attached to the reference numerals 7 are connected via a printed circuit board 19.

The rotor 21 has a magnet 22 facing the salient pole 17 of the stator 13, and a bearing 24 is fixed to a shaft 23 holding the rotor 21. The bearing 24 is supported together with an insulating bearing plate 25 by an insulating bearing housing 26 fitted to the inner diameter of the yoke 14. The bearing housing 26 is screwed together with a housing holding plate 27 that presses the insulating bearing plate 25. It is fixed to the stator 13 at 28,
The bearing 24 is supported.

In the above-described configuration, the concentric arc portion 17b provided on the rectangular parallelepiped portion 17a of the salient pole 17 is in contact with the outer periphery of the yoke 14, and the semicircular groove 17c is fitted to the yoke 14, thereby increasing the magnetic resistance. In addition to forming the stator core without removing the core, the material removal of the stator core can be improved, and the bobbin 16 around which the coil 15 is wound is inserted into the rectangular parallelepiped portion 17a of the salient pole 17, so that the winding of the coil 15 can be facilitated. Thus, the space factor of the coil 15 can be improved, the gap 29 between the coils 15 can be formed as a substantially rectangular parallelepiped, cooling air can easily pass through, and the cooling effect can be improved.

A bobbin 16 around which the coil 15 is wound
Is held by the T-shaped portion 17d of the salient pole 17 and the outermost periphery of the yoke 14, so that the coil 15 can be securely fixed.

An arc-shaped protrusion 14a is provided outside the hole 18 for assembling the motor with the concentric arc 17b of the salient pole 17 so that the concentric arc 17b of the salient pole 17 contacts the arc-shaped protrusion 14a. Therefore, it is possible to prevent the magnetic resistance from increasing due to the hole 18 for assembling the motor.

Further, by soldering the end of the coil 15 wound around the bobbin 16 to the printed circuit board 19,
The coils 15 respectively mounted on the plurality of salient poles 17 can be connected via the printed circuit board 19, and the connection between the coils 15 can be facilitated.

Further, a bearing 24 is fixed to a shaft 23 holding the rotor 21, and the bearing 24 is insulated from the bearing 24 by an insulating bearing housing 26 fitted to the inner diameter of the yoke 14.
5 supporting the bearing housing 26 and the insulating bearing contact plate 2
5 is screwed to the yoke 14 and the bearing 24 is supported, so that the bearing 24 and the stator core are insulated by the insulating bearing housing 26 and the insulating bearing plate 25. Since the insulation performance can be improved, and the motor can be operated by itself, it is possible to assemble the motor after confirming the performance.

[0023]

As described above, according to the first aspect of the present invention, there is provided a stator in which a plurality of salient poles each having a bobbin around which a coil is wound are fixedly mounted on the outer periphery of a yoke, Has a concentric arc portion and a semicircular groove portion provided in a rectangular parallelepiped portion to be inserted into the bobbin, the concentric arc portion is in contact with the outer periphery of the yoke, and the semicircular groove portion is fitted with the yoke, Since it is fixed to the yoke, the stator core can be formed without increasing the magnetic resistance.
The material removal of the stator core can be improved, the winding of the coil can be facilitated, and the space factor of the coil can be improved.

According to the second aspect of the present invention, there is provided a printed circuit board for connecting a coil mounted on a plurality of salient poles, and an end of the coil wound around a bobbin is inserted into the printed circuit board to form a solder. Since the coils are attached to the plurality of salient poles, the coils attached to the plurality of salient poles can be connected via the printed circuit board, and the connection between the coils can be facilitated.

According to the third aspect of the present invention, a bearing fixed to a shaft for holding a rotor, and an insulating bearing which supports a bearing plate which is insulated from the bearing and is fitted to the inner diameter of the yoke. A housing and a housing retainer plate abutting against the insulating bearing abutment plate; and the bearing is supported by screwing the bearing housing and the housing retainer plate to the yoke. The bearing abutment plate can insulate the bearing from the stator core,
Since the insulation performance can be improved, and the motor can be operated by itself, it is possible to assemble the motor after confirming the performance.

[Brief description of the drawings]

FIG. 1 is a sectional view of a motor according to an embodiment of the present invention.

FIG. 2 is a plan view of a stator core of the motor.

FIG. 3 is an enlarged plan view of a salient pole of the motor.

FIG. 4 is an enlarged plan view of a yoke of the motor.

FIG. 5 is a plan view of a stator of the motor.

FIG. 6 is a sectional view of a conventional motor.

FIG. 7 is a plan view of a stator core of the motor.

[Description of Signs] 13 Stator 14 Yoke 15 Coil 16 Bobbin 17 Salient pole 17a Rectangular body 17b Concentric arc 17c Groove

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yutaka Inoue 1006 Kazuma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Terms (reference) 5H002 AA06 AA07 AB06 AC01 AE08 5H603 AA09 BB09 BB13 CA01 CA05 CB12 CB20 CC01 CC11 CC17 CD21 EE01 5H604 AA03 AA08 BB01 BB14 BB15 BB17 CC01 CC05 CC15 PB03 QB04 5H605 AA08 BB19 EB05 EB05 BB05

Claims (3)

[Claims] 1. A stator having a plurality of salient poles fixed to a bobbin around which a coil is wound around an outer periphery of a yoke, wherein the salient poles have a concentric arc portion provided on a rectangular parallelepiped portion to be inserted into the bobbin and a semicircle. A motor having the groove portion and the concentric arc portion in contact with the outer periphery of the yoke, and the semicircular groove portion fitted to the yoke and fixed to the yoke. 2. The motor according to claim 1, further comprising a printed circuit board for connecting the coils mounted on the plurality of salient poles, wherein an end of the coil wound around the bobbin is inserted into the printed circuit board and soldered. 3. A bearing fixed to a shaft holding a rotor,
An insulative bearing housing that supports the bearing and the insulative bearing abutment and fits into the inner diameter of the yoke; and a housing retainer abuts against the insulative bearing abutment. 2. The motor according to claim 1, wherein the motor is screwed to the yoke to support a bearing.