JPH0928049A - Stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To readily insulate a coil from a stator core. SOLUTION: A plurality of leg sections 4a is integrally formed with a terminal block 4 made of synthetic resin and, when the leg sections 4a are inserted into gaps 5 from one end side of a stator core 1 in the axial direction, the leg sections 4a are interposed to insulate a main coil 3A from the stator core 1 and auxiliary coil 3B from the stator core 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor stator in which a terminal block is provided at an end of a stator core.

[0002]

In a stator of a capacitor induction motor, a stator iron core is composed of an annular yoke iron core and a plurality of tooth iron cores projecting inwardly of the yoke iron core, and the stator iron cores are combined with each other. There is one in which a coil is wound through a winding frame made of resin. This stator is used for fan devices for ventilation fans for pipes,
A terminal block made of synthetic resin, which has a circuit portion for supplying power to the coil, is arranged at one axial end of the stator core.

In the case of the above construction, the flange portions are integrally formed at both ends of the winding frame, and the coil and the stator core are insulated from each other by the one flange portion located between the coil and the stator core. However, if the number of windings of the coil is increased in order to increase or decrease the output of the motor, or if the coil is unevenly wound around the winding frame,
The insulation distance between the coil and the stator core becomes shorter. On the other hand, in the past, since the insulation distance between the coils was secured by inserting the insulation member into the gap between the coils, the work of inserting the insulation member was troublesome and the number of steps for assembling the stator increased. .

The present invention has been made in view of the above circumstances, and an object thereof is to provide a stator of a motor which can easily insulate the coil and the stator core from each other and can reduce the number of assembling steps. That is.

[0005]

According to a first aspect of the present invention, there is provided a stator for a motor, the stator core having an annular yoke core, and a plurality of teeth cores provided on the yoke core and projecting inward of the yoke core. And a plurality of winding frames provided on each teeth core of the stator core and having flanges at both ends, coils wound on these winding frames, and provided on one axial end of the stator core. A terminal block made of resin having a circuit section for supplying power to each coil, the leg block being inserted into a gap between adjacent coils from one axial end of the stator core. The feature is that a plurality of them are integrally formed.

According to the above means, when the terminal block is gripped and the leg portion of the terminal block is inserted into the gap between the adjacent coils from one end side in the axial direction of the stator core, the leg is interposed between each coil and the stator core. The coil and the stator core are insulated from each other by the legs. Therefore, since the complexity of inserting the insulating members into the plurality of gaps can be eliminated, the number of steps for assembling the stator can be reduced.

A stator of a motor according to a second aspect is characterized in that each leg portion is in contact with a collar portion of each adjacent winding frame. According to the above means, when the leg portions are inserted into the gaps between the coils from one end side in the axial direction of the stator core, the leg portions come into contact with the flange portions of the adjacent winding frames, and the terminal block with respect to the stator core. Be positioned horizontally.

The stator of the motor according to claim 3 is characterized in that each leg portion is in contact with the inner surface of the yoke core. According to the above means, when the legs are inserted into the gap between the coils from one end side in the axial direction of the stator iron core, each leg comes into contact with the inner surface of the yoke iron core, and the terminal block moves in the horizontal direction with respect to the stator iron core. Is positioned to.

According to a fourth aspect of the present invention, in the stator of the motor, each leg has a stepped portion that comes into contact with one end face in the axial direction of the yoke core, and each leg is retained by the retaining means with respect to the stator core. It has a feature where it is. According to the above means, when the legs are inserted into the gaps between the coils from one end side in the axial direction of the stator core, the stepped portions of each leg contact the one end face in the axial direction of the yoke core, and the terminal block becomes the stator. The legs are positioned in the height direction with respect to the iron core, and each leg is retained against the stator iron core.

In the stator of the motor according to the fifth aspect, the retaining means is integrally formed on each leg portion, and the yoke iron core is formed between the leg portion and the step portion by engaging with the other axial end surface of the yoke iron core. It has a feature in that it is a claw portion to be sandwiched. According to the above means, when the leg portions are inserted into the gaps between the coils from one end side in the axial direction of the stator core, the stepped portions of each leg portion come into contact with the one end surface in the axial direction of the yoke core, and the claws of each leg portion are contacted. The portion engages with the other axial end surface of the yoke core. Therefore, the yoke iron core is sandwiched between the step portion and the claw portion, and each leg portion is prevented from coming off from the stator iron core.

According to a sixth aspect of the present invention, in a stator of a motor, a gap is formed between the yoke iron core and one flange portion of each winding frame, and a protrusion inserted into the gap is integrally formed with each leg portion. It is characterized by According to the above means, when the leg portion is inserted into the gap between the coils from one end side in the axial direction of the stator iron core, the protrusion of each leg portion is inserted in the gap formed between the yoke iron core and one flange portion of each winding frame. Is inserted. Therefore, the insulation distance from each coil to the yoke iron core along the one flange and the protrusion becomes long.

[0012]

FIG. 1 shows a first embodiment of the present invention.
7 will be described with reference to FIG. In this embodiment, the present invention is applied to a condenser induction motor of a fan device used for a ventilation fan for pipes. First, in FIG. 1, a stator core 1 is constructed by fitting four tooth cores 1b (only one is shown in FIG. 2) at a 90 ° pitch on the inner peripheral portion of a rectangular yoke core 1a. Was done,
The four tooth iron cores 1b project inside the yoke iron core 1a and are connected to each other via a cylindrical connecting portion 1c. still,
A rotor (not shown) is housed inside the connecting portion 1c.

As shown in FIG. 2, the body portion 2a of the winding frame 2 is fitted on each tooth core 1b. Each of these reels 2 is made of synthetic resin, and as shown in FIG. 1, flanges 2b and 2c are integrally formed at both ends of each body 2a. The main coil 3A is wound around the body 2a of the reel 2 located on the left and right sides of FIG. 1, and the auxiliary coil 3B is wound around the body 2a of the remaining two reels 2. When assembling the stator core 1, after fitting the reel 2 around which the main coil 3A is wound and the reel 2 around which the auxiliary coil 3B is wound onto the teeth core 1b, the teeth core 1b is attached to the yoke core. Fit in 1a.

As shown in FIG. 2, a terminal block 4 made of synthetic resin (specifically made of polybutylene terephthalate) is provided on the upper end side (one end side in the axial direction) of the stator core 1. As shown in FIG. 5, the terminal block 4 has a shape in which a part of a circular plate is cut out in a straight line shape. The leg portion 4a of the book is integrally formed. As shown in FIG. 1, these leg portions 4a are inserted into the gaps 5 between the adjacent coils 3A and 3B, and the inner surface of each leg portion 4a contacts the flange portion 2c, so that each leg portion 4a. The outer surface of is in contact with the collar portion 2b.
It should be noted that gaps are formed between each leg 4a and the main coil 3A, between each leg 4a and the auxiliary coil 3B, and between each leg 4a and the yoke iron core 1a.

As shown in FIG. 3, a chamfered portion 4b is formed on the outer surface of each of the leg portions 4a, as shown in FIG. Each of these chamfered portions 4b has an inclined surface shape that approaches the yoke iron core 1a side from the tip end portion to the base end portion of the leg portion 4a. It has a function of escaping the inner peripheral portion and guiding the leg portion 4a between the collar portions 2b and 2c of the winding frame 2. Further, as shown in FIGS. 5 and 6, the terminal block 4 is integrally formed with a connector portion 4c. The connector portion 4c is located on the upper surface of the terminal block 4, and has a rectangular box shape opening to the right side in the drawing.

The terminal block 4 is provided with a power supply circuit section (not shown). This power supply circuit section is composed of a plurality of conductors (not shown) buried in the terminal block 4. In FIG. 4, one end of each conductor is located inside the connector section 4c and the other end of the conductor is located. The part is connected to the coil 3A or 3B. Therefore, when the mating connector is fitted in the opening of the connector portion 4c, the terminal of the mating connector is connected to the conductor, and the coil 3A is passed from the mating connector through the conductor.
And 3B are powered.

The conductors of the power supply circuit section are insert-molded when the terminal block 4 is molded, and are connected to the coils 3A and 3B via connecting members such as lead wires and terminal pins. Further, a driving capacitor (not shown) is mounted on the terminal block 4, and this capacitor is connected to a predetermined conductor in the power feeding circuit section. Also,
A circular opening 4d is formed in the center of the terminal block 4, and one rotation shaft of the rotor projects outside the terminal block 4 through the opening 4d.

According to the above embodiment, the terminal block 4 is gripped, and the four leg portions 4a from the upper end side of the stator core 1 are separated by the gap 5.
, The leg portions 4a are attached to the plurality of gaps 5 at a time, and the main coil 3A and the stator core 1 and the auxiliary coil 3 are connected to each other.
B and the stator core 1 are insulated by the leg portions 4a.
The pushing operation of the leg portions 4a is performed against the contact pressure between each leg portion 4a and the collar portions 2b and 2b (so-called press-fitting).

Therefore, the main coil 3A and the auxiliary coil 3
Even if the number of windings of B is large or the main coil 3A and the auxiliary coil 3B are wound around the winding frame 2 in a biased manner, each coil 3
A reliable insulation is provided between A and 3B and the stator core 1. Moreover, at the same time as mounting the terminal block 4, the coils 3A and 3B are insulated from the stator core 1, and
Since it is not necessary to insert an insulating member into each of the plurality of gaps 5, the number of steps for assembling the stator is reduced, and as a result, the cost of the device is reduced.

Further, the inner surface of each leg portion 4a was brought into contact with the collar portion 2c, and the outer surface of each leg portion 4a was brought into contact with the collar portion 2b. Therefore, the terminal block 4 is positioned in the horizontal direction with respect to the stator core 1, and as a result, the terminal block 4 is prevented from rattling in the horizontal direction. Moreover, the terminal block 4 is attached to the stator core 1 in a state of being prevented from being pulled out by the contact pressure between the leg portions 4a and the flange portions 2b and 2b.

Further, the chamfered portion 4 is provided at the tip of each leg 4a.
b was formed. Therefore, when the terminal block 4 is mounted on the stator core 1, the chamfered portions 4b escape from the inner peripheral portion of the yoke core 1a, so that the legs 4a do not catch on the yoke core 1a and smoothly move into the gap 5. Inserted in. At the same time, each leg portion 4a is provided with a chamfered portion 4b so that the collar portions 2b and 2
It is guided between c and is smoothly mounted in the gap 5 between the coils 3A and 3B.

Next, a second embodiment of the present invention will be described with reference to FIGS.
2 will be described. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
Only different members will be described. First, in FIGS. 10 to 12, a thick portion 4e is formed at the base end of each leg 4a.
Are integrally formed, and a step portion 4f is formed between the thick portion 4e and the remaining portion. Further, as shown in FIGS. 8 and 9, a portion of each leg portion 4a excluding the chamfered portion 4b and the thick portion 4e is in contact with the inner surface corner portion of the yoke iron core 1a.

According to the above embodiment, each leg portion 4a and the collar portion 2 are
4 leg portions 4a from the upper end side of the stator core 1 against the contact pressure with b, the contact pressure between each leg 4a and the collar 2c, and the contact pressure between each leg 4a and the yoke core 1a. Is press-fitted into the gap 5, the step portion 4f of each leg portion 4a abuts on the upper end surface of the yoke core 1a, and each leg portion 4a is mounted in the gap 5 in a retaining state. For this reason, since the terminal block 4 is positioned in the height direction with respect to the stator core 1, stress is prevented from acting on the winding frame 2 via the terminal block 4.

Next, a third embodiment of the present invention will be described with reference to FIG. The same members as those in the second embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. A claw portion 4g corresponding to a retaining means is integrally formed on each leg portion 4a, and each claw portion 4g is arranged apart from the step portion 4f by the thickness of the yoke core 1. In addition, the chamfered portion 4 of each leg portion 4a
A gap 6 is formed between the remaining portion excluding b, the thick portion 4e, and the claw portion 4g and the inner surface of the yoke core 1a.

According to the above embodiment, the leg portions 4 are provided in the gaps 5 between the coils 3A and 3B from the upper end side of the stator core 1.
a and push in the stepped portion 4f of each leg portion 4a to the yoke core 1a.
When brought into contact with the upper end surface of, the claw portion 4g of each leg portion 4a engages with the lower end surface of the yoke iron core 1a. Therefore, the yoke iron core 1a is sandwiched between the step portions 4f and the claw portions 4g, and the leg portions 4a are securely attached to the stator iron core 1 in a retaining state.

In the first to third embodiments described above, the leg portions 4a are brought into contact with the collar portions 2b and 2c of the bobbin 2. However, the present invention is not limited to this. For example, the collar portion 2 is used.
It may be configured so as to be in contact with either one of b and 2c.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. 14 and 15. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The terminal block 4 is integrally formed with four legs 4a '. These leg portions 4a 'are inserted into the gap 5 between the coils 3A and 3B, and the outer surface of each leg portion 4a' is the yoke core 1a.
, And both side surfaces of each leg portion 4a ′ are in contact with the side surface of one flange portion 2b of each adjacent winding frame 2. Further, gaps are formed between the leg portions 4a ′ and the main coil 3A, between the leg portions 4a ′ and the auxiliary coil 3B, and between the leg portions 4a ′ and the collar portion 2c of the winding frame 2.

According to the above embodiment, when the four leg portions 4a 'are press-fitted into the gap 5 from the upper end side of the stator core 1, the leg portions 4a' and the yoke iron core 1a come into contact with each other and each leg portion 4a.
′ And the flange portion 2b of the winding frame 2 are in contact with each other, and each leg portion 4a ′ is positioned horizontally by the yoke iron core 1a and the winding frame 2. Therefore, the terminal block 4 is prevented from rattling in the horizontal direction. At the same time, the terminal block 4 is attached to the stator core 1 in a retaining state by the contact pressure between the leg portions 4a 'and the yoke iron core 1a and the contact pressure between the leg portions 4a' and the flange portion 2b. .

In the fourth embodiment, each leg 4 is
a'is brought into contact with the collar portion 2b and the yoke iron core 1a,
The present invention is not limited to this. For example, the yoke iron core 1a
Contact only with the yoke core 1a and the two collars 2b, 2
You may make it contact with c.

Next, a fifth embodiment of the present invention will be described with reference to FIG. The same members as those in the fourth embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described.

One flange portion 2b of the winding frame 2 and the yoke core 1a
A gap 7 is formed between and. In addition, each leg 4a
Projections 4h projecting toward the winding frame 2 are integrally formed on both side surfaces of the ‘′, and the projections 4h are inserted into the gaps 7.
Further, a gap is formed between each leg portion 4a and the main coil 3A, between each leg portion 4a and the auxiliary coil 3B, between each protrusion 4h and the flange portion 2b of the winding frame 2, and both side surfaces of each leg portion 4a 'are formed. Is
It is in contact with the side surfaces of the flange portions 2b and 2c of the adjacent reels 2.

According to the above embodiment, the leg portion 4a is provided in the gap 5 between the coils 3A and 3B from the upper end side of the stator core 1.
When is pressed in, the protrusion 4h is inserted into the gap 7 between the yoke core 1a and the flange 2b. Therefore, the insulation distance from the main coil 3A to the yoke core 1a along the flange 2b and the protrusion 4h, and the auxiliary coil 3B to the flange 2b and the protrusion 4h.
The insulation distance to the yoke core 1a along the length becomes longer, and as a result, the insulation performance between the coils 3A and 3B and the stator core 1 is improved.

In the fifth embodiment, each leg 4 is
Although a ′ is brought into contact with the collar portions 2b and 2c and the yoke iron core 1a, the invention is not limited to this, and for example, the collar portion 2
b, the collar portion 2c, or the yoke iron core 1a, or any two of the collar portion 2b, the collar portion 2c, and the yoke iron core 1a may be contacted.

In the fourth and fifth embodiments, the leg portions 4a 'are connected to the inner surface of the yoke core 1a and the bobbin 2.
However, the present invention is not limited to this. For example, a step is formed on each leg 4a ', and this step is formed on the upper end surface of the yoke iron core 1a. Positioning may be performed in the height direction along with the contact.

In the fourth and fifth embodiments, the leg portions 4a 'are connected to the inner surface of the yoke iron core 1a and the winding frame 2.
The stator core 1 is prevented from coming off from the stator core 1 when it is brought into contact with, but is not limited to this. For example, a step portion and a claw portion are formed in each leg portion 4a ′, and the step portion and the claw portion are formed. The yoke core 1a may be sandwiched between the stator core 1 and the yoke core 1a.

In the first to fifth embodiments, the terminal block 4 is made of polybutylene terephthalate (PBT).
However, the present invention is not limited to this, and may be formed of polyphenylene sulfide (PPS), for example.

[0037]

As is apparent from the above description, the stator of the motor of the present invention has the following effects. According to the means described in claim 1, since the legs of the terminal block can be inserted into the plurality of gaps between the adjacent coils at one time, the complexity of inserting the insulating members into the plurality of gaps is eliminated, and as a result, The number of man-hours for assembling the stator is reduced. According to the means described in claim 2, since the leg portions and the flange portions of the winding frame can be brought into contact with each other by inserting the leg portions into the gaps between the adjacent coils, the terminal block is fixed to the stator. Positioned horizontally with respect to the iron core.

According to the third aspect of the present invention, since the leg portions and the yoke iron core can be brought into contact with each other by inserting the leg portions into the gaps between the adjacent coils, the terminal block is fixed to the stator. Positioned horizontally with respect to the iron core.
According to the means described in claim 4, since the step portion of each leg portion can be brought into contact with the one axial end surface of the stator core by inserting the leg portion into the gap between the adjacent coils, The terminal block is positioned in the height direction with respect to the stator core, and is fixed to the stator core.

According to the means described in claim 5, the stator core can be sandwiched between the stepped portion and the claw portion of each leg by inserting the leg into the gap between the adjacent coils. The legs are locked against the stator core. Claim 6
According to the described means, one flange portion of the winding frame and the projection of each leg portion can be overlapped with each other by inserting the leg portion into the gap between the adjacent coils. The insulation distance between the iron cores becomes longer.

[Brief description of drawings]

FIG. 1 is a bottom view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line EE of FIG.

3 is a cross-sectional view taken along the line of FIG.

FIG. 4 is a top view

FIG. 5: Top view of terminal block

FIG. 6 is a side view of the terminal block.

FIG. 7 is a vertical sectional view of the terminal block.

FIG. 8 is a vertical sectional view showing a second embodiment of the present invention (equivalent to FIG. 3).

9 is a cross-sectional view taken along the line of FIG.

FIG. 10 is a diagram corresponding to FIG. 5;

FIG. 11 is a view corresponding to FIG.

FIG. 12 is a view corresponding to FIG. 7.

FIG. 13 is a longitudinal sectional view showing a third embodiment of the present invention (corresponding to FIG. 3).

FIG. 14 is a cross sectional view showing a fourth embodiment of the present invention (FIG. 15).
Cross-sectional view along the line

FIG. 15 is a vertical sectional view (equivalent to FIG. 3)

FIG. 16 is a cross sectional view showing a fifth embodiment of the present invention.

[Explanation of symbols]

1 is a stator core, 1a is a yoke core, 1b is a teeth core, 2 is a winding frame, 2b and 2c are flanges, 3A is a main coil (coil), 3B is an auxiliary coil (coil), 4 is a terminal block, 4a. And 4a 'are leg portions, 4f is a step portion, 4g is a claw portion (prevention means), and 5 and 7 are gaps.

Claims (6)

[Claims] 1. A stator core having an annular yoke core and a plurality of teeth cores provided on the yoke core and projecting to the inside of the yoke core, and each stator core provided with the stator core. A plurality of reels each having a flange portion, a coil wound around each of these reels, and a resin provided with an axial end portion of the stator core and having a power supply circuit portion for each coil. A motor having a terminal block, wherein a plurality of legs are formed integrally with the terminal block so as to be inserted into a gap between adjacent coils from one end side in the axial direction of the stator core. Stator. 2. The stator of a motor according to claim 1, wherein each leg portion is in contact with a collar portion of each adjacent winding frame. 3. The stator for a motor according to claim 1, wherein each leg is in contact with the inner surface of the yoke core. 4. A step portion is formed on each leg portion, the step portion being in contact with one end surface in the axial direction of the yoke iron core, and each leg portion is retained by the retaining means with respect to the stator iron core. The stator for a motor according to claim 1, wherein the stator is a motor. 5. The retaining means is a claw portion that is integrally formed with each leg portion and that sandwiches the yoke iron core with the step portion by engaging with the other axial end face of the yoke iron core. The stator of the motor according to claim 4. 6. A gap is formed between the yoke core and one flange portion of each winding frame, and each leg portion is integrally formed with a protrusion to be inserted into the gap. The stator of the motor according to 1.