JP3015639U - Brushless DC motor pole piece - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a pole piece of a brushless DC motor that has the effect of not cutting the enamel wire when winding the wire or breaking the insulating layer of the enamel wire. With the goal. [Structure] A curved portion having a slight arc is formed at the edge of the pole surface of the pole piece, the curved portion is fitted into a notch in the stator seat, and the height of the curved portion is smaller than the thickness of the plate surface of the stator seat. The stator seat is provided with a supporting leg and an inverted hook, which are configured to be engaged and coupled to the opposite side of the hole of the circuit board.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, since the curved portion is provided at the edge of the pole face of the pole piece, and the curved portion is provided corresponding to the notch of the stator seat, the conductor wire is not damaged when the coil is wound around the stator seat. It relates to a pole piece of a brushless DC motor.

[0002]

[Prior art]

 Conventionally, this kind of thing is as follows. In the stator seat of a conventional brushless DC motor, the coil used to generate a rotating magnetic field uses an enamel wire with a thin thickness of several tens of microns, like hair, in the wire winding. Since it is flexible and susceptible to damage, defective operation of the motor is likely to occur. Also, in the patent of US Pat. No. 4,891,567 in the United States, since the pole face of the pole piece is formed in a shape bent perpendicular to the pole piece itself, the pole face of the pole piece is the coil of the stator seat. It is covered by the outer edge. Therefore, first, the pole pieces must be attached to the stator seat by pressing after finishing winding the conductor wire of the coil of the stator seat.

[0003]

[Problems to be solved by the device]

 The conventional techniques described above have the following problems. In the above-mentioned work, when the pole piece is fixed to the stator seat by a press, the coil is likely to be broken or the insulating layer of the enamel conductor wire of the coil in the stator seat is likely to be pressed. When the insulating layer of the enamel wire is destroyed, the coil is subjected to the shock of the starting current for a long period of time, which easily causes the coil to deteriorate quickly over time, causing the motor to malfunction and Use life is shortened. The device disclosed in the above-mentioned patent has a problem that the coil is easily broken, or the insulating layer of the enamel wire of the coil is easily compressed, so that the coil is subject to the shock of the starting current for a long time, Since it easily deteriorates quickly, it causes a malfunction of the motor and shortens the service life of the motor.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide the following things. Since the curved part is provided at the edge of the pole surface, there is no problem that the enamel conductor is cut when the enamel conductor is wound or the insulating layer of the enamel conductor is destroyed. To provide pole pieces.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is as follows. That is, according to the present invention, the pole pieces 1 are provided above and below the stator seat 2, respectively, and the pole piece 1 is connected to the stator seat 2 by the coupling holes 12 and the projecting pillars 22 which are provided to each other. Shaft holes 13 and 25 are provided in the center of the stator seat 2, the metal shaft 3 is penetrated into the shaft holes 13 and 25, and the coil 23 is attached to the outer periphery of the shaft column 24 provided in the stator seat 2. It is constructed so that it can be used for winding a conductor wire, and a curved curved portion 11 is provided at the edge of the polar surface of the pole piece 1, and the height of the curved portion 11 is smaller than the thickness of the board surface of the stator seat 2. It is a pole piece of a brushless DC motor that is constructed. In this case, the following can be done. 1. The stator seat 2 can be provided with a cutout 21 at a position corresponding to the curved portion 11 of the pole piece 1. 2. The stator seat 2 is provided with a supporting leg 26, and the supporting leg 26 is provided with an inverted hook 261. The supporting leg 26 can be connected to a hole 41 on the surface of the circuit board 4, and the inverted hook 261 is connected to the hole 41 of the circuit board 4. Can be connected to the other side of the circuit board 4 by engaging with.

[0006]

[Action]

 The operation will be described together with the effect.

[0007]

【Example】

 Examples will be described with reference to the drawings. In FIG. 1, the pole piece 1 is formed with a curved portion 11 having a slight arc degree at the edge of its pole surface by using a pressing method, and the pole piece 1 is provided with a coupling hole 12 and a shaft hole 13. Has been. The stator seat 2 is provided with a notch 21 and a protruding column 22, which can be fitted into the coupling hole 12 of the pole piece 1, and at the same time, the curved portion 11 of the pole piece 1 is just the stator seat 2. It is located at the cutout 21, and the curved portion 11 of the pole piece 1 is curved in the winding direction of the conductor of the stator seat 2. A shaft column 24 is provided at the center of the stator seat 2, a shaft hole 25 is provided inside the shaft column 24, and the outer periphery of the shaft column 24 is used for winding a coil thereon. The position of the shaft hole 25 of the stator seat 2 is matched with the position of the shaft hole 13 of the upper and lower pole pieces 1, and the metal shaft 3 is penetrated therethrough. In this case, the shaft hole in the metal shaft 3 is used for the rotation shaft of the rotor 5 to penetrate therethrough. Further, the stator seat 2 is provided with a support leg 26 and an inverted hook 261 which can be coupled with a hole 41 on the surface of the circuit board 4, and the inverted hook 261 penetrates the hole 41 of the circuit board 4, It serves to lock and connect to the opposite side of the circuit board 4. 2 and 3, after connecting the pole piece 1 to the stator seat 2, the curved portion 11 of the pole piece 1 is located in the notch 21 of the stator seat 2, and the curved portion 11 is the plate of the stator seat 2. It is configured to be curved toward the surface. The height of the curved portion 11 is preferably smaller than the thickness of the board surface of the stator seat 2.

[0008]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. After the pole piece 1, the stator seat 2 and the metal shaft 3 are assembled and completed, the coil 23 is wound around the outer circumference of the shaft column 24 of the stator seat 2. In this case, since the curved portion 11 is formed at the edge of the pole piece 1 and the height of the curved portion 11 is smaller than the thickness of the board surface of the stator seat 2, the enamel conductor wire is cut when winding the conductor wire. There is no problem such as damage to the insulating layer of the enamel wire or damage to the enamel wire. In addition, it can eliminate the production process of a poor operation in which the press presses the enamel wire after the wire winding is completed. Therefore, there are advantages that the work of winding the wire of the coil is further rationalized, the defect rate of the brushless DC motor is reduced, and the normal service life of the motor can be extended.

[Brief description of drawings]

FIG. 1 is an exploded perspective view.

FIG. 2 is a plan view.

FIG. 3 is a front view with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 pole piece 2 stator seat 3 metal shaft 4 circuit board 5 rotor 11 curved part 12 coupling hole 13,25 shaft hole 21 missing hole 22 protruding column 23 coil 24 shaft column 26 support leg 261 upside down hook 41 hole

Claims (3)

[Scope of utility model registration request] 1. A pole piece (1) is provided above and below the stator seat (2), and the pole piece (1) and the stator seat (2) are provided with a coupling hole (12) and a protruding column (1). Two
2), shaft holes (13, 25) are provided at the centers of the pole piece (1) and the stator seat (2), and the metal shaft (3) penetrates into the shaft holes (13, 25). The outer circumference of the shaft column (24) provided in the stator seat (2) is configured so that it can be used for winding the coil (23), and the edge of the pole face of the pole piece (1) is A pole piece for a brushless DC motor, characterized in that a curved bending portion (11) is provided, and the height of the bending portion (11) is smaller than the thickness of the board surface of the stator seat (2). 2. The pole of a brushless DC motor according to claim 1, wherein the stator seat (2) is provided with a notch (21) at a position corresponding to the curved portion (11) of the pole piece (1). One piece. 3. The stator seat (2) is provided with a supporting leg (26), the supporting leg (26) is provided with an inverted hook (261), and the supporting leg (26) has a hole () in the surface of the circuit board (4). 41) and the inverted hook (261) can be connected to the circuit board (4).
2. A pole piece for a brushless DC motor according to claim 1, wherein said pole piece penetrates through said hole (41) and is engaged with and connected to the opposite side of the circuit board (4).