JP2001148150A - Brushless motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve low cost by reducing the amount of wire processing work and eliminating an insulator, and simultaneously to improve the mechanical rigidity of a bearing part in the brushless motor of an outer rotor type. SOLUTION: An insulating terminal base 30a is disposed to cover a tip projected part in the outer periphery of a stator iron core 7, a terminal pin 31a is planted in the insulating terminal base 30a, and the head and tail end wires of stator winding are electrically connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a brushless motor for information and video equipment.

[0002]

2. Description of the Related Art In recent years, there has been a strong demand for miniaturization / cost reduction of disk-shaped media devices such as hard disk devices, magneto-optical disk devices, optical disk devices, and floppy disk devices. There is also a demand for a rotary-driven brushless motor to be reduced in size and cost.

A conventional brushless motor will be specifically described with reference to FIG. The hub 1 is press-fitted into the rotating shaft 2 and integrally rotates together in one direction. Hub 1 also has
A ring-shaped magnet 5 and a yoke 6 made of a soft magnetic material are bonded. The inner peripheral cylindrical surface of the magnet 5 is magnetized with a plurality of poles. At the lower end of the rotating shaft 2, a thrust flange 8
Are fixed by screws 10. Here, the rotor is constituted by the hub 1, the rotating shaft 2, the magnet 5, the yoke 6, and the thrust flange 8. 9 is a thrust plate attached to the base 3.

[0004] A stator core 7 made of a magnetic material is adhered and fixed to the base 3.
Is wound. Further, the start / end line 19 of the stator winding 4 is passed through a wiring hole 40 provided in an insulator 20 inserted into the base 3, and is soldered to the wiring substrate 11 at the lower end of the base 3 for electrical connection. Do. FIG. 9 shows another conventional example.

[0007] The description that overlaps with FIG. 8 is omitted. In the conventional example shown in FIG. 9, an insulated terminal block 30 is provided on the inner peripheral side of the stator core 7, and the insulated terminal block 30 is provided.
A conductive terminal pin 31 is press-fitted, and the start and end lines 19 of the stator winding 4 are entangled with the terminal pin 31 and soldered. The entanglement with the terminal pin 31 is automatically performed by an automatic winding machine. After the completion of the soldering process, the stator core 7 is bonded to the base 3.

[0006]

In the conventional brushless motor shown in FIG. 8, it is necessary to manually insert a plurality of stator windings 4 into the wiring holes 40 of the insulator 20. It was extremely bad. In particular, as the motor becomes smaller, the workability deteriorates and the assembly cost increases significantly.

[0007] In the conventional brushless motor shown in FIG.
The method of disposing the insulated terminal block 30 on the inner peripheral side of the stator core 7 and soldering the start and end wires 19 to the terminal pins 31 can reduce the manual assembling work. Since the wiring hole 41 for penetrating the base 3 into the base 3 has to be arranged near the bearing, the mechanical rigidity of the bearing with respect to the base 3 is reduced, and accuracy is deteriorated and motor vibration is increased. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to reduce the amount of wire processing work and reduce costs by eliminating insulators, and to improve the mechanical rigidity of a bearing portion.

[0009]

In the brushless motor of the present invention, an insulating terminal block is fitted and disposed so as to cover a salient pole at the outer periphery of a stator core, and terminal pins are set on the insulating terminal block. The start and end lines of the stator winding are electrically connected. According to this configuration, it is possible to greatly improve the assemblability of the work of processing the start and end lines of the stator winding, and at the same time, it is possible to suppress the deterioration of the mechanical rigidity of the bearing portion.

In the brushless motor according to the present invention, a hole is provided in a salient pole at the tip of the outer periphery of the stator core, and a terminal block protrusion provided on the insulating terminal block is fitted and fixed in the hole. The terminal pin is press-fitted to the terminal block projection. According to this configuration, it is possible to greatly improve the workability of processing the start and end lines of the stator winding, suppress the deterioration of the mechanical rigidity of the bearing portion, and improve the mechanical strength of the terminal pin at the same time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A brushless motor according to a first aspect of the present invention has a stator core inside and a stator winding wound therearound, and a magnet facing the stator core outside. In the outer rotor type brushless motor having the above, an insulating terminal block having a terminal pin is provided at a tip salient pole portion of the stator core, and a start and end line of the stator winding is electrically connected to the terminal pin. I do.

According to a second aspect of the present invention, in the brushless motor according to the first aspect, the terminal pins are located in slots of the stator core. The brushless motor according to claim 3 of the present invention has an outer rotor type brushless motor having a stator core inside and a stator winding wound therearound, and an outer side having a magnet facing the stator core. A hole or notch is formed in the axial end face at the tip salient pole portion of the stator core, and an axially extending portion fitted to the hole or the notch and attached to the stator core is formed. An insulating terminal block having a terminal block projecting portion and holding the terminal pins in an upright position is provided, and a starting and ending line of the stator winding is electrically connected to the terminal pins.

According to a fourth aspect of the present invention, in the brushless motor according to the third aspect, the terminal block protrusion of the insulated terminal block is made of a material having a soft magnetic material. Hereinafter, embodiments of the present invention will be described with reference to FIGS. (Embodiment 1) FIGS. 1 and 2 show (Embodiment 1) of the present invention.

In FIG. 1, a hub 1 is press-fitted into a rotating shaft 2 and integrally rotates together in one direction. Hub 1 also has
The yoke 6 made of a soft magnetic material and the magnet 5 are bonded. The inner peripheral cylindrical surface of the magnet 5 is magnetized with a plurality of poles.
A thrust flange 8 is fixed to a lower end of the rotating shaft 2 by a screw 10. Here, the rotor is constituted by the hub 1, the rotating shaft 2, the magnet 5, the yoke 6, and the thrust flange 8.

A stator core 7 made of a magnetic material is adhered and fixed to the base 3, and a stator winding 4 composed of a plurality of phases is wound around the core. An insulating terminal block 30 a is attached to the start and end lines 19 of the stator winding 4 at the slot end of the stator core 7. Terminal pins 31a of the insulating terminal block 30a
Are connected to the wiring board 11 at the lower end of the base 3 through the connection holes 42 by soldering.

More specifically, as shown in FIG. 2A, a resin-made insulating terminal block 3 having a segment shape and having insulating properties is provided.
No. 0a is fitted to the salient pole portion 32 of the stator core 7 as shown in FIG. In this case, it may be reinforced with an adhesive or the like. Terminal pins 31a are press-fitted into the insulating terminal block 30a. After the insulating terminal block 30a is fitted to the stator core 7, the stator winding 4 is wound, and the start and end wires 19 are wound around the terminal pins 31 and soldered.

Here, by sequentially switching the energization to the plural-phase stator windings 4 via the wiring board 11, a torque is generated between the stator windings 4 and the magnets 5, so that the rotor Rotates in a predetermined direction. With this configuration,
When bonding the stator core 7 to the base 3, the stator winding 4
The starting and ending lines 19 of the wiring holes 4 on the base 3 are manually formed.
It is possible to reduce the number of steps of passing through zero.

Further, the terminal pin 31a can be penetrated into the base 3 relatively on the outer peripheral side of the motor, and it is not necessary to provide the wiring hole 41 near the bearing as in the conventional example. As a result, the motor can be configured without deteriorating the rigidity of the base 3, and an increase in vibration can be prevented. In the first embodiment, a plurality of insulating terminal blocks 30a are individually molded and fitted to the stator core 7, but the present invention is not limited to this, and the present invention is not limited to this. 7 may be integrally molded.

(Embodiment 2) FIG. 3 shows (Embodiment 2) of the present invention. Note that the difference from (Embodiment 1) is only the planting position of the terminal pin 31a, and the rest is the same as (Embodiment 1). As shown in the figure, an insulating terminal block 30a is fitted to the stator core 7. Here, the insulating terminal block 30a protrudes greatly into the gap between the slots 33 of the stator core. The terminal pin 31a is
Is press-fitted.

Note that adjacent insulating terminal blocks 30a have a predetermined gap so that the stator windings 4 can be wound around the stator core 7. With this configuration,
When bonding the stator core 7 to the base 3, the stator winding 4
The starting and ending lines 19 of the wiring holes 4 on the base 3 are manually formed.
It is possible to reduce the number of steps of passing through zero.

Further, the terminal pin 31a can be made to penetrate the base 3 relatively on the outer peripheral side of the motor, so that it is not necessary to provide the wiring hole 41 near the bearing as in the conventional example. As a result, the motor can be configured without deteriorating the rigidity of the base 3, so that it is possible to prevent an increase in vibration. In addition, since the terminal pins 31a are inserted relatively deeply into the insulating terminal block 30, the terminal pins 31a are firmly held and held. As a result, it is possible to suppress wobble and inclination of the terminal pin 31 during assembly, and it is possible to improve assemblability.

(Embodiment 3) FIGS. 4 and 5 show (Embodiment 3) of the present invention. In FIG. 4, a hub 1 is press-fitted into a rotary shaft 2 and integrally rotates together in one direction. A yoke 6 made of a soft magnetic material and a magnet 5 are bonded to the hub 1. The inner peripheral cylindrical surface of the magnet 5 is magnetized with a plurality of poles.

At the lower end of the rotating shaft 2, a thrust flange 8 is provided.
Are fixed by screws 10. Here, the rotor is constituted by the hub 1, the rotating shaft 2, the magnet 5, the yoke 6, and the thrust flange 8. A stator core 7 made of a magnetic material is adhered and fixed to the base 3, and a stator winding 4 composed of a plurality of phases is wound here. Start / end line 19 of stator winding 4
Are soldered and connected to terminal pins 31a provided on the insulating terminal block 30a. The insulating terminal block 30a is provided with the stator core 7
Are fitted to the tip salient pole portions 32.

More specifically, as shown in FIG. 5, the distal salient pole portion 32 has at least one salient pole portion hole 35, into which the terminal block projection 36 is press-fitted to fix the insulating terminal block 30a. I do. Although the salient pole hole 35 has a circular shape in FIG. 5, the present invention is not limited to this.
For example, a square hole shape may be used. Further, the salient pole portion hole 35 does not have to penetrate the stator core 7. Further, the insulating terminal block 30a may be formed by insert molding on the stator core 7.

The terminal pins 31a of the insulated terminal block 30a are soldered through the wiring holes 41 of the base 3 and through the connection holes 42 to the wiring board 11 at the lower end of the base 3.
Here, by sequentially switching the energization to the stator windings 4 of a plurality of phases via the wiring board 11, a torque is generated between the stator windings 4 and the magnets 5, and the rotor is driven in a predetermined manner. Rotate in the direction.

With this configuration, when the stator core 7 is press-fitted into the base 3, the number of steps for manually processing the start and end lines 19 of the stator windings 4 can be greatly reduced. Become. Further, the terminal pins 31a can be made to penetrate the base 3 relatively on the outer peripheral side of the motor, so that it is not necessary to provide the wiring hole 41 near the bearing as in the conventional example. As a result, it is possible to configure the motor without deteriorating the rigidity of the base 3, so that it is possible to prevent an increase in vibration. Further, even if the lower gap of the stator core 7 cannot be sufficiently secured, the terminal pins 31 can be firmly held by the terminal block projections 36. Further, the workability of the winding work of the stator winding 4 is not impaired.

By forming at least a part of the terminal block protrusion 36 from a soft magnetic material such as a ferrite core, an increase in the magnetic circuit resistance due to the presence of the protrusion hole 35 provided in the stator core is prevented. It is possible to suppress and improve the motor efficiency. (Embodiment 4) FIGS. 6 and 7 show (Embodiment 4) of the present invention.

The difference from the third embodiment is that the terminal pins 31
(b) Only the planting structure of (b) is the other (Embodiment 3)
Is the same as As shown in FIGS. 6 and 7, a plurality of cutout grooves 37 are provided in the tip salient pole portion 32 of the stator core 7 to reduce cogging, and the insulating terminal block 30 b The terminal block protrusion 36 having the axially extending portion is located. Further, terminal pins 31b are press-fitted into the terminal block projections 36.

With this configuration, when the stator core 7 is press-fitted into the base 3, the number of steps for manually processing the start and end lines 19 of the stator windings 4 can be greatly reduced. Become. Further, the terminal pins 31a can be made to penetrate the base 3 relatively on the outer peripheral side of the motor, so that it is not necessary to provide the wiring hole 41 near the bearing as in the conventional example. As a result, the motor can be configured without deteriorating the rigidity of the base 3, so that it is possible to prevent an increase in vibration. Further, even when the lower gap of the stator core 7 cannot be sufficiently secured, the terminal pins 31b can be firmly held and held by the terminal block projections 36. Further, the workability of the winding work of the stator winding 4 is not impaired.

[0030]

As described above, the brushless motor according to the present invention has a stator core inside and a stator winding wound therearound, and an outer side having a magnet facing the stator core outside. In the rotor type brushless motor, an insulating terminal block having a terminal pin is provided at a tip salient pole portion of the stator core, and the start and end lines of the stator winding are electrically connected to the terminal pins. At the time of bonding, it is possible to reduce the step of manually passing the start and end lines of the stator winding through the wiring holes on the base. Further, the terminal pins can be made to penetrate the base relatively on the outer peripheral side of the motor, so that it is not necessary to provide a wiring hole near the bearing as in the conventional example. As a result, the motor can be configured without deteriorating the rigidity of the base, so that it is possible to prevent an increase in vibration.

The brushless motor of the present invention is an outer rotor type brushless motor having a stator core inside and a stator winding wound therearound, and having a magnet on the outside facing the stator core. A hole or notch is formed in an axial end surface of the tip salient pole portion of the stator core, and an axially extending portion fitted to the hole or the notch and attached to the stator core is provided. An insulating terminal block having a terminal block projecting portion and holding a terminal pin in place is provided, and for electrically connecting a start and end line of the stator winding to the terminal pin, when bonding a stator core to a base. This makes it possible to reduce the number of steps for manually passing the start and end lines of the stator winding through the wiring holes on the base. Further, the terminal pins can be made to penetrate the base relatively on the outer peripheral side of the motor, so that it is not necessary to provide a wiring hole near the bearing as in the conventional example.
As a result, the motor can be configured without deteriorating the rigidity of the base, so that it is possible to prevent an increase in vibration. Further, the terminal pins can be firmly fixed to the insulating terminal block without impairing the workability of the winding operation of the stator winding.

[Brief description of the drawings]

FIG. 1 is a sectional view of a brushless motor according to a first embodiment of the present invention;

FIG. 2 is a perspective view of the insulated terminal block and the stator core of the embodiment.

FIG. 3 is a perspective view of an insulated terminal block and a stator core according to a second embodiment of the present invention;

FIG. 4 is a sectional view of a brushless motor according to a third embodiment of the present invention;

FIG. 5 is a plan view of the vicinity of a tip salient pole of the stator core according to the embodiment;

FIG. 6 is a cross-sectional view of a brushless motor according to a fourth embodiment of the present invention.

FIG. 7 is a plan view of the vicinity of a tip salient pole of the stator core according to the embodiment;

FIG. 8 is a sectional view of a conventional brushless motor.

FIG. 9 is a cross-sectional view of another conventional brushless motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub 2 Rotating shaft 3 Base 4 Stator winding 5 Magnet 6 Yoke 7 Stator iron core 8 Thrust flange 9 Thrust plate 10 Screw 11 Wiring board 19 Start terminal line 20 Insulator 30a, 30b Insulated terminal block 31a, 31b Terminal pin 32 Tip salient pole portion 33 Slot portion 35 Salient pole portion hole 36 Terminal block projection 37 Notch groove (notch portion) 40, 41 Wiring hole 42 Connection hole

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 5D109 BA03 BA14 BA17 BA20 BA26 BA29 5H019 AA06 AA10 CC04 CC09 DD01 EE01 EE09 EE14 FF01 FF03 GG01 5H604 AA05 BB17 CC01 CC05 CC16 PB03 QB03 QB04 QB14 JH01GB01 J01 GA01

Claims (4)

[Claims] 1. An outer rotor type brushless motor having a stator core inside and a stator winding wound therearound, and having a magnet facing the stator core on the outside, wherein: A brushless motor, comprising: an insulated terminal block having a terminal pin at a tip salient pole portion; and a start and end line of the stator winding electrically connected to the terminal pin. 2. The brushless motor according to claim 1, wherein said terminal pins are located in slots of said stator core. 3. An outer rotor type brushless motor having a stator core inside and a stator winding wound therearound, and an outer side having a magnet facing the stator core, wherein the stator core has a magnet. A hole or notch is formed in the axial end surface of the tip salient pole, and a terminal block protrusion having an axially extending portion fitted to the hole or the notch and attached to the stator core is provided. A brushless motor, comprising: an insulating terminal block for implanting and holding terminal pins; and a start and end line of the stator winding electrically connected to the terminal pins. 4. The brushless motor according to claim 3, wherein the terminal block projection of the insulated terminal block is made of a material having a soft magnetic material.