JP4639280B2 - Motor stator ground mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ground mounting structure for a motor stator, and in particular, the ground when a resin mold is formed on the entire surface of a ring-shaped stator is protruded from the resin mold via a ground wire or a protruding substrate portion of a printed circuit board. The present invention relates to a novel improvement for eliminating the need to attach a ground wire to the lid, rear lid and case.
[0002]
[Prior art]
Conventionally, this type of motor stator ground attachment structure is generally used after attaching a stator winding to a ring-shaped stator, and then attaching a front lid, rear lid, and case, and connecting a ground wire to any of these. Was.
[0003]
[Problems to be solved by the invention]
Since the conventional motor stator ground mounting structure is configured as described above, the following problems exist.
In other words, in the conventional configuration, the ground wire is connected to the front lid, rear lid, and case after the motor is completed. Therefore, when applied to a structure in which the entire ring-shaped stator is molded with resin, it is impossible to ground the ground wire. It was.
[0004]
The present invention has been made to solve the above-described problems, and in particular, when a resin mold is formed on the entire surface of a ring-shaped stator, the resin mold is grounded via a ground wire or a protruding substrate portion of a printed circuit board. It is an object of the present invention to provide a ground attachment structure for a motor stator that does not require a ground wire to be attached to a front lid, a rear lid, and a case.
[0005]
[Means for Solving the Problems]
A grounding structure for a motor stator according to the present invention is a motor stator in which an entire surface of a ring-shaped stator provided with a stator winding via an insulating bobbin is covered with a resin mold portion, and the ring-shaped stator yoke of the ring-shaped stator and the insulating bobbin A ground wire is inserted into a gap formed between the ground wire, one end of the ground wire is connected to the ring-shaped stator yoke, and the other end is led out of the gap. A motor stator in which the entire surface of a ring-shaped stator provided with stator windings is covered with a resin mold portion, a printed circuit board is provided on the ring-shaped stator, and the ring-shaped stator yoke between the ring-shaped stator and the insulating bobbin An earth wire is inserted into the gap formed at the end, one end of the earth wire is connected to the annular stator yoke, and the other end After connecting to the printed circuit board, the resin molded portion covers the ring-shaped stator and the printed circuit board, and the protruding printed circuit board portion having the printed pattern connected to the ground wire protrudes from the resin molded portion. It is a configuration.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of a grounding structure for a motor stator according to the present invention will be described below with reference to the drawings.
In FIG. 1 and FIG. 2, a reference numeral 1 denotes a ring-shaped stator that is laminated in a multilayer shape to form a ring shape. The ring-shaped stator 1 is provided inside the ring-shaped stator yoke 2 and the ring-shaped stator yoke 2 to form a ring shape. And an annular pole tooth portion 4 having a large number of slots 3.
[0007]
Each slot 3 is provided with a well-known insulating bobbin 5 so as to cover each pole tooth 4 a of the annular pole tooth portion 4 and the slot 3.
A stator winding 6 is wound around each slot 3 via an insulating bobbin 5. In this embodiment, the ring-shaped stator 1 is formed into a two-piece structure of a ring-shaped stator yoke 2 and a ring-shaped pole tooth portion 4, and the stator winding 6 is wound around each slot 3. Although the configuration in which the tooth portion 4 is fitted has been described, the configuration is not limited to the above-described configuration, and an integrated type in which the slot is opened toward the inside, and a stacked type and a non-stacked integrated type are also used. Can do.
[0008]
One end of the ground wire 7 is inserted into the gap 100 between the ring-shaped stator yoke 2 and the insulating bobbin 5 and connected to the inner wall 2e of the ring-shaped stator yoke 2 with solder or the like. It is led out to the outside of the annular stator yoke 2.
[0009]
In the case of the configuration shown in FIG. 1 and FIG. 2 described above, a resin mold portion 10 is formed on the entire surface of the ring-shaped stator 1 by a resin mold as indicated by a one-dot chain line, and the ground wire 7 is a mold of the mold portion 10. It is led out sufficiently from the outer diameter position 10a.
[0010]
Next, the structure shown in FIG. 3 and FIG. 4 shows another form of the form of FIG. 1 and FIG. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted.
That is, as shown in FIG. 3, the overall shape is substantially a horseshoe shape, and has a printed pattern 21 connected to the stator winding 6.
At the center position of the arc portion 22 of the printed circuit board 20, a protruding substrate portion 23 protruding in the radial direction of the annular stator 1 is integrally formed, and the printed pattern 21 extends to the protruding substrate portion 23, and Each is connected to a terminal hole 24.
[0011]
The other end of the ground wire 7 connected to the inner wall of the annular stator 1 is connected to the empty pattern 21 a of the printed pattern 21 of the protruding substrate portion 23 of the printed board 20.
Therefore, as shown in FIG. 4, when the entire surface of the annular stator 1 is covered with the resin mold part 10 so as to cover the printed board 20, the protruding substrate part 23 protrudes from the mold outer diameter position 10 a of the resin mold part 10. An empty pattern 21a which is a part of the print pattern 21 is also provided to be exposed outward from the mold outer diameter position 10a.
[0012]
【The invention's effect】
Since the motor stator grounding structure according to the present invention is configured as described above, the following effects can be obtained.
That is, the ground wire provided on the inner wall of the ring-shaped stator is sufficiently led out between the ring-shaped stator and the insulating bobbin, or the ground wire is connected to the printed pattern of the protruding substrate portion of the printed circuit board. Therefore, even when the resin mold portion is formed on the entire surface of the ring-shaped stator, the ground wire or the protruding substrate portion is led out from the mold outer diameter position of the resin mold portion, and even in the stator having the resin mold portion, the earth function Can be ensured.
[Brief description of the drawings]
FIG. 1 is a plan view showing a ground attachment structure of a motor stator according to the present invention.
FIG. 2 is a front cross-sectional configuration diagram of FIG. 1;
FIG. 3 is a plan view of another embodiment of FIG. 1;
4 is a front cross-sectional configuration diagram in which a resin mold portion is formed in the configuration of FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ring-shaped stator 5 Insulation bobbin 6 Stator winding 7 Ground wire 10 Resin mold part 20 Printed circuit board 21 Print pattern 23 Projection board part

Claims (2)

In a motor stator in which the entire surface of a ring-shaped stator (1) provided with a stator winding (6) via an insulating bobbin (5) is covered with a resin mold part (10), the ring-shaped stator yoke of the ring-shaped stator (1) The ground wire (7) is inserted into a gap (100) formed between (2) and the insulating bobbin (5), and one end of the ground wire (7) is connected to the annular stator yoke (2). The other end of the motor stator is led out of the gap (100). In the motor stator in which the entire surface of the annular stator (1) provided with the stator winding (6) via the insulating bobbin (5) is covered with the resin mold part (10), the printed circuit board ( 20), and a ground wire (7) is inserted into a gap (100) formed between the ring-shaped stator yoke (2) of the ring-shaped stator (1) and the insulating bobbin (5). One end of the wire (7) is connected to the annular stator yoke (2) and the other end is connected to the printed circuit board (20), and then the resin-molded part (10) is used to connect the annular stator (1) and the printed circuit board ( 20) and a protruding substrate portion (23) protruding from the printed circuit board (20) having a printed pattern (21) connected to the ground wire (7) and protruding from the resin mold portion (10) A grounding structure for a motor stator.

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