JP3497340B2 - Rotary motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary electric motor such as a thin motor for rotating a medium used in a magnetic disk or an optical disk drive, and more particularly to a structure of a stator portion.

[0002]

2. Description of the Related Art As a rotary electric motor of this type, a rotary electric motor as disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 8-19196 has been proposed to meet the needs for thinning. That is, FIG.
1 is a front view showing the configuration of a conventional rotary electric motor of this type, FIG.
2 is a front view showing the configuration of the connected stator cores in FIG. 11 in a developed manner.

In the figure, 1 is a substrate, 2 is a rotor supported on the substrate 1 through a bearing (not shown), 3 is a rotor magnet arranged on the outer peripheral portion of the rotor 2, and 4 is this. The resin-molded housing 5, which is arranged on the substrate 1 so as to surround the rotor 2 at a distance from the rotor magnet 3, is shown in FIG.
A plurality of yoke portions 5 _b which are joined to each other through a thin wall portion 5 _a, as shown in, are formed in the respective yoke part 5 _b the pole Teisu 5 _c respectively the number equal to the number of phases of the motor is projected A plurality of connected stator cores are laminated to fold the thin portion 5a into _a desired shape, and then the thin portion 5a is attached to the resin molded housing 4. 6 is a coil wound on each magnetic pole Teisu 5 _c.

[0004]

Since the conventional rotary electric motor is constructed as described above, other parts are provided above the connecting stator core 5, that is, in a part of the space on the substrate 1 so as to be close thereto. If this is the case, it is difficult to increase the capacity of the electric motor because the desired magnetic path cross section cannot be obtained by increasing the number of stacked stator cores 5 further.

The present invention has been made in order to solve the above problems, and increases the number of laminated yoke portions placed at positions where there is enough space to secure a magnetic path cross section, thereby improving the electric motor. It is an object of the present invention to provide a rotary electric motor capable of increasing the capacity of the.

[0006]

According to a first aspect of the present invention, there is provided a rotary electric motor in which the number of phases of the electric motor is in the yoke portion in a state where the magnetic material is laminated and connected through a thin portion or the thin portion is cut. In a rotary motor in which a stator portion formed by projecting magnetic pole teeth of the same number as the above and winding a coil around each magnetic pole is arranged on a metal frame, a resin molded product or a substrate so as to face the rotor portion, The number of laminated layers of each yoke portion is increased according to the margin of the space space on the metal frame or the resin molded product or the substrate on which the respective portions are arranged.

Further, a rotary electric motor according to a second aspect of the present invention is the rotary electric motor according to the first aspect, wherein bent edges facing the rotor portion are formed at the tips of the magnetic pole teeth of the yoke portion having a small number of layers. .

A rotary electric motor according to claim 3 of the present invention.
The yoke according to claim 1 or 2, wherein the number of laminated layers is small.
Printed circuit board or printed wiring for coil terminal wiring
A wiring resin film is arranged.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a perspective view showing a configuration of a stator portion of a rotary electric motor according to Embodiment 1 of the present invention, FIG. 2 is an exploded view showing a stator core of the stator portion in FIG. 1, (A) is a front view, and (B) is a front view. ) Is a side view, and FIG. 3 is a front view showing a step of winding a coil around the stator core in FIG. 2.

In the figure, as shown in FIG. 2A, reference numeral 7 denotes six yoke portions _7b1 , _7b2 , _7b3 , _7b4 , _7b5 , which are connected in a straight line via _a thin portion _7a . 7 _b6 ,
Each of the yoke portions ₇ b1 _{to 7-b6} phases of minutes of the number of motor from, i.e. formed with three portions projecting from the pole Teisu _{7 c1, 7 c2, 7 c3} , 7 c4, 7 c5, 7 c6 and The stator core is made of magnetic material and is shown in Fig. 2 (B).
As shown in FIG. 5, five sheets are laminated, and for example, the three sheets from the top are the yoke portions 7 _b4 , 7 _b5 and the magnetic pole teeth 7 _c4 ,
7 _c5 is omitted. 8 is each magnetic pole teeth 7 _{c1 to} 7
_The coil wound around _c6 constitutes the stator portion 9 together with the stator core 7. Reference numeral 10 is a winding machine, 11 is a nozzle of the winding machine 10, and 12 is a winding wire supplied from the nozzle 11.

Next, a method of assembling the stator portion 9 of the rotary electric motor configured as described above will be described. First, the stator core 7 to the yoke 7 _b1 to _7-b6 is connected to a straight line as shown in FIG. 2 to 5 stacked. At this time, the three yoke portions 7 _b4 and 7 _b5 and the magnetic pole teeth 7 _c4 and 7 _{c5 from the top} are removed by cutting at the thin portion 7 _a . Next, as shown in FIG. 3, the winding wire 12 supplied from the winding nozzle 11 of the winding machine 10 is connected to each yoke portion _7b1.
Each of the magnetic pole teeth 7 _{c1 to} 7 _{c6 of} 7 to 7 _b6 is wound at the same time, and the coil 8 is sequentially formed for each of the yoke portions 7 _{b1 to} 7 _b6 . Then, as shown in FIG. 1, each thin portion 7 _a
To form an annular shape by bending each yoke portion 7 _b4 ,
7 _b5 and the magnetic pole teeth 7 _c4 , 7 _c5 are removed, and the assembly is completed by arranging them on the side where there is no space in terms of space and fixing them to the position facing the rotor part on the substrate (not shown). ..

[0012] According to the first way above described, the yoke portion ₇ disposed on the side not afford the space board space _{b4, 7 b5} and pole Teisu _{7 c4, 7 c5}
Remove the, thinner by reducing the number of laminations, and each yoke portion 7 _{b1 to 7-b3,} 7 which are arranged on a side having a margin in space space _b6 and pole Teisu 7
_{Since all of c1 to} 7 _c3 and 7 _c6 are left and the number of laminated layers is increased to increase the thickness to secure the magnetic path cross section,
Even if another part is provided close to a part of the space on the board, the capacity of the electric motor can be increased.

In the above construction, the number of laminated stator cores 7 is 5, but the number is not limited to this, and the number may be increased or decreased according to the required cross section of the magnetic path. The number of stator cores 7 for removing the yoke portions 7 _b4 , 7 _b5 and the magnetic pole teeth 7 _c4 , 7 _c5 is also
Needless to say, it may be determined according to the margin of the space, and the same effect as that of the above configuration can be exhibited.

Embodiment 2. 4 is a perspective view showing a structure of a stator portion of a rotary electric motor according to Embodiment 2 of the present invention, and FIG. 5 is an exploded view showing a manufacturing process of a stator core of the stator portion in FIG.

In the figure, reference numeral 13 denotes six yoke portions 13 _b1 , 13 _b2 , 13 _b3 , 13 _b4 , 13 connected in a straight line through _a thin portion 13 _a as shown in FIG. 5 (A).
_b5, and _{13 b6,} respective yoke portion ₁₃ b1 to 13
The number of magnetic poles 13 _c1 , 13 _c2 , 13 _c3 , 1 protruding from _{b6 by} the number of phases of the electric motor, that is, three by three, is provided.
3 _c4 , 13 _c5 , and 13 _c6 , which are magnetic cores and are made up of five layers as shown in FIG. 4. For example, the four from the top are the yoke parts 13 _b4 , 13
_b5 and magnetic pole teeth 13 _c4 , 13 _c5 are omitted, and the remaining one magnetic pole teeth 13 _c4 , 13
_A bent edge 14 is formed at the tip of _c5 so as to face the rotor portion (not shown). Reference numeral 15 denotes a coil wound around each of the magnetic pole teeth 13 _{c1 to} 13 _c6 , which constitutes the stator portion 16 together with the stator core 13.

Next, a method of assembling the stator portion 16 of the rotary motor configured as described above will be described. First,
As shown in FIG. 5 (A), each yoke portion 13 _{b1 to} 13 _b6
Stack five stator cores 13 connected in a straight line. At this time, each of the yoke portions 13 _b4 , 1
3 _b5 and magnetic pole teeth 13 _c4 , 13 _c5 thin portion 1
Together removed by cutting with 3 _a, the remaining 1
The tips of the magnetic pole teeth 13 _c4 and 13 _c5 of the sheet are shown in FIG.
As shown in (B) and (C), bend upward to bend edge 1
4 are formed respectively. Next, although not shown, a coil 15 is formed on each of the magnetic pole teeth 13 _{c1 to} 13 _c6 by applying a winding in the same manner as in the first embodiment. Then, as shown in FIG. 4, each thin wall portion 13 _a is bent into an annular shape, and each yoke portion 13 _b4 , 13 is formed.
The _b5 and pole Teisu 13 _c4, 13 _c5 the removed portion, disposed on the side with no space space to spare, assembled by although not shown for fixing the position opposite to the rotor portion of the substrate is completed.

As described above, according to the second embodiment, as in the case of the first embodiment, the yoke portions _13b4 , 13 are arranged on the side of the substrate where the space space is not large.
By removing _b5 and the magnetic pole teeth 13 _c4 and 13 _c5 , the number of laminated layers is reduced to reduce the thickness, and each yoke portion 13 arranged on the side having a sufficient space space.
_{b1 to} 13 _b3 , 13 _b6 and magnetic pole teeth 13 _c1
Since all 13 to 13 _c3 and 13 _c6 are left and the number of laminated layers is increased to increase the thickness to secure the magnetic path cross section,
Even if other parts are provided close to a part of the space on the board, the capacity of the electric motor can be increased and the magnetic pole teeth 1 on the side where the number of laminated layers is small.
Since the tips of 3 _c4 and 13 _c5 are bent to form the bent edge 14 so as to face the rotor portion, it is possible to secure the area of the magnetic pole facing the rotor portion and prevent the efficiency from decreasing. You can also get the effect.

Embodiment 3. FIG. 6 is a developed view showing a state in which a printed wiring resin film for terminal wiring is arranged on a part of a stator core of a stator portion of a rotary electric motor according to Embodiment 3 of the present invention.
(A) is a front view, (B) is a side view, FIG. 7 is a front view showing a state where the stator core in FIG. 6 is bent into an annular shape, and FIG. 8 is
FIG . 9 is a front view showing a method of joining the end of the coil to the printed wiring of the printed wiring resin film in FIG.
It is a perspective view which shows the detail of the joining part in 8 .

In the figure, reference numeral 17 denotes a stator core formed by laminating a plurality of sheets, and both ends are formed thin with a small number of laminated layers. Reference numeral 18 denotes a first printed wiring resin film arranged on the yoke portion at one end and the magnetic pole teeth, as shown in FIG.
As shown in FIG. 5, printed wirings 18 _a are formed to extend outward from the portions corresponding to the magnetic pole teeth.
19 is a second printed wiring resin film disposed on the other end of the yoke part and the pole Teisu, printed circuit 19 _a connected by extending Mashimashi from one end portion corresponding to each magnetic pole Teisu have been made. 20 coils wound on each magnetic pole Teisu, 21 terminals of the coil 20, 22 is a solder for bonding the printed wiring 18 _a of the terminal 21 and the first printed wiring resin film 18.

As shown in FIG. 6 (A) , the stator portion of the third embodiment configured as described above has the first and second printed wiring resin films 18 on both end portions where the number of laminated stator cores 17 is small. , 19 are arranged, for example, at one end side, when the coil 20 is wound as shown in FIG. 8 , the terminal 21 is wound around the first printed wiring resin film 18 several times, and as shown in FIG. the terminal 21 of the coil 20 is assembled by bonding the printed wiring 18 _a of the first printed wiring resin film 18.

As described above, according to the third embodiment, since the first and second printed wiring resin films 18 and 19 are arranged in the portion of the stator core 17 where the number of laminated layers is small, the coil 20 is wound. Each printed wiring of both printed wiring resin films 18 and 19 by simultaneous work with 1 times
It is possible to bond the 8 _a, 19 _a, easily connected to the terminal 21 and the external circuit of the coil 20, and automation becomes possible can common junction.

In the above configuration, the case where the printed wiring resin film is arranged in the portion where the number of laminated layers of the stator core 17 is small has been described, but a printed circuit board may be arranged instead of this, or the stator core 17 may be arranged. The part with a small number of layers is originally formed at a position where there is no room in the space space, so if it is not possible to place a printed wiring resin film or printed circuit board,
It goes without saying that a portion having a small number of laminated layers may be formed at a position having a sufficient space space, and a printed wiring resin film may be arranged, if necessary.

[0023]

As described above, according to the first aspect of the present invention, the number of phases of the electric motor is increased in the yoke portion in the state where the magnetic material is laminated and connected through the thin portion or the thin portion is cut. In a rotary electric motor in which a stator portion formed by projecting an equal number of magnetic pole teeth and winding a coil around each magnetic pole taste is arranged on a metal frame, a resin molded product or a substrate so as to face the rotor portion, each yoke portion Since the number of laminated layers of each yoke is increased according to the margin of space on the metal frame, resin molded product, or substrate on which each is arranged, the lamination of the yokes placed in a position with sufficient space It is possible to provide a rotary electric motor in which the number of magnetic paths can be ensured by increasing the number and the capacity of the electric motor can be increased.

According to a second aspect of the present invention, in the first aspect, the bent edges facing the rotor portion are formed at the tips of the magnetic pole teeth of the yoke portion having a small number of laminated layers. It is possible to provide a rotary electric motor capable of ensuring the areas of the magnetic poles facing each other and preventing a decrease in efficiency.

According to claim 3 of the present invention,
In 1 or 2, the coil is attached to the yoke with a small number of layers.
Printed circuit board or printed wiring resin board for terminal wiring of
Since the film is arranged, the coil terminal and the external circuit are connected.
Continuation and common joints can be easily performed and automated rotation
An electric motor can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a stator portion of a rotary electric motor according to Embodiment 1 of the present invention.

2 is a diagram showing the stator core of the stator portion in FIG. 1 in a developed manner, in which (A) is a front view and (B) is a side view.

FIG. 3 is a front view showing a step of winding a coil around the stator core in FIG.

FIG. 4 is a perspective view showing a structure of a stator portion of a rotary electric motor according to Embodiment 2 of the present invention.

FIG. 5 is an expanded view showing the manufacturing process of the stator core of the stator portion in FIG.

FIG. 6 is a rotary electric motor according to a third embodiment of the present invention .
A part of the stator core of the
Figure showing the state in which the wiring resin film is placed
Here, (A) is a front view and (B) is a side view.

7 is a shape in which the stator core in FIG . 6 is bent in an annular shape.
It is a front view which shows a state.

FIG. 8 is a view of the printed wiring resin film in FIG .
Front view showing how to join coil ends to lint wiring
Is.

9 is a perspective view showing details of a joint portion in FIG.
It

FIG. 10 is a front view showing a configuration of a conventional rotary electric motor.
It

FIG. 11 shows a configuration of a connected stator core in FIG .
It is a front view expanded and shown.

[Explanation of symbols]

7, 13, 17 Stator core, 7 _a , 13 _a Thin wall portion, 7 _{b1 to} 7 _b6 , 13 _{b1 to} 13 _b6 Yoke portion, 7 _{c1 to} 7 _c6 , 13 _{c1 to} 13 _c6 Magnetic pole teeth, 8, 15, 20 coil, 9,16 Stator part, 10
Winding machine, 11 a nozzle, 12 winding, 14 Orikyokuen, 18 first printed wiring resin film, 19 second printed wiring resin _film, 18 a, 19
_a Printed wiring, 21 terminals, 22 solder.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Kenichi Higashi Inventor Kenichi Higashi 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) Reference JP-A-8-19196 (JP, A) −44872 (JP, U) Actual development Sho 59-78847 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 1/18 H02K 29/00

Claims (3)

(57) [Claims] 1. The magnetic pole teeth having a number equal to the number of phases of the electric motor are projected on the yoke portion in a state where they are laminated with a magnetic material and are connected through a thin portion or the thin portion is cut, In a rotary electric motor in which a stator part formed by winding a coil is arranged on a metal frame or a resin molded product or a substrate so as to face the rotor part, the metal frame or the resin molded product in which each of the yoke parts is arranged. Alternatively, the rotary motor is characterized in that the number of laminated layers of each of the yoke portions is increased according to the margin of the space on the substrate. 2. The rotary electric motor according to claim 1, wherein bent edges facing the rotor portion are formed at the tips of the magnetic pole teeth of the yoke portion having a small number of laminated layers. 3. A coil terminal at a yoke portion having a small number of laminated layers.
Printed circuit board or printed wiring resin film for wiring
The arrangement according to claim 1 or 2, characterized in that
Rotary electric motor.