JP3219620B2 - Motor stator - Google Patents

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 body.

[0002]

2. Description of the Related Art In a motor (capacitor induction motor) used for a fan device such as a pipe fan, a stator body in which a main winding and an auxiliary winding are wound around a stator core via an insulating member. At one end in the axial direction, a terminal block having a circuit portion for supplying power to a winding including a capacitor and a connector for connection to an external circuit is provided.

In this case, the terminal block is formed of, for example, a circular printed wiring board, and its wiring pattern has a terminal portion for connection with a winding, and a connection portion with a capacitor and a connection portion with a connector. It is configured to have. Among them, the terminal portion for connection with the winding has a hole. On the other hand, the winding end of each winding is connected to a plurality of pins provided at the end of the insulating member, and the pins are soldered to the terminals while being inserted into the holes. It has become. The capacitor is electrically connected to the connection portion of the wiring pattern by soldering in a state where the leads are formed, and is fixed on the terminal block by an adhesive.

[0004]

However, when the capacitor is fixed to the terminal block with an adhesive as described above, the cost is relatively high because the adhesive is used, and at the same time, the adhesive is cured. It takes time,
There is a possibility that the adhesive may adhere to other parts, and it is difficult to accurately position the capacitor.

On the other hand, there has been provided a molded capacitor in which a tongue-shaped mounting leg having a screw insertion hole is integrally formed in a plastic package. If such a capacitor is employed, the capacitor can be fixed to the terminal block by screwing without using an adhesive. However, even in this case, there are drawbacks that screws and the like are required, the number of parts is large, the cost is high, and the screwing operation, which is a fine operation, is required, and the mounting operation is troublesome.

The present invention has been made in view of the above circumstances, and an object of the present invention is to mount a capacitor on a terminal block provided on a stator body, and to easily and inexpensively mount the capacitor. To provide a motor stator.

[0007]

According to a first aspect of the present invention, there is provided a motor stator in which a plurality of windings are wound around a stator core via an insulating member, and one end in the axial direction of a stator body is provided with a resin. Wherein the conductor is insert-molded, and a terminal block constituting a circuit portion for supplying power to the winding is provided by connecting a capacitor to a capacitor connection portion of the conductor, Are formed of a mold type in which mounting legs having an engaged portion are integrally protruded from a package, and a capacitor is provided on the terminal block .
The mounting part is connected to the capacitor lead
The capacitor mounting portion is provided with an insertion hole into which the mounting leg is inserted, and the engaging portion is extended from the edge of the insertion hole in the insertion direction. The mounting piece is provided integrally, and the capacitor is mounted on the terminal block by inserting the mounting leg into the insertion hole and engaging the engaged portion with the engaging portion. Having.

In this case, a rib may be formed on the inner edge of the insertion hole facing the mounting piece (the invention of claim 2). Further, it is effective if the mounting piece of the terminal block is located in the gap between the windings (the invention of claim 3).

[0009] Further, capacitor back surface of the attachment portion may be configured so as to abut the end of the insulating member (the invention of claim 4).

[0010]

According to the motor stator of the first aspect of the present invention,
The mounting legs formed integrally with the capacitor package,
By being inserted into the insertion hole formed in the capacitor mounting portion of the terminal block, the terminal block has an engaging portion of a mounting piece portion integrally provided so as to extend in the insertion direction from the edge of the insertion hole,
The engaged portion of the mounting leg is engaged. With this, the capacitor is positioned by the fitting of the mounting leg into the insertion hole, and is prevented from being removed by the engagement between the engaging portion and the engaged portion. Attached to At this time, the mounting piece having the engaging portion is provided integrally with the terminal block, and the mounting leg having the engaged portion is provided integrally with the package of the capacitor, so that another component such as an adhesive or a screw is used. In addition to eliminating the necessity, the mounting of the capacitor to the terminal block can be accomplished by simply inserting the mounting legs into the insertion holes. Only
Also, the capacitor mounting part is
Provided so as to be placed on the
Eliminates the need for forming leads for capacitors
Electrical connection to the connection
You.

In this case, if a rib is formed at the inner edge of the insertion hole facing the mounting piece, the dimension between the insertion hole and the mounting leg can be increased. The errors can be absorbed by the ribs, so that the mounting legs are more firmly fixed. Also, the mounting piece of the terminal block
If it is located in the gap between the windings (the stator of the motor according to claim 3), the space in the gap between the windings can be effectively used, and the axial dimension of the stator is unnecessarily large. It can be prevented from increasing.

[0012] Further, the rear surface of the capacitor mounting portion, be configured so as to abut the end of the insulating member (stator according to claim 4 motor), a capacitor mounting portion, for the terminal block of the stator body This can contribute to positioning.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a capacitor induction motor used in a fan device will be described below with reference to FIGS. This embodiment corresponds to claims 1, 3 and 4 . Although not shown in detail, the motor according to the present embodiment includes a stator 1 disposed in a frame, and a rotor having a rotation axis disposed rotatably in a field space inside the stator 1. It is configured. A blower blade is attached to a tip of the rotating shaft projecting from the frame.

FIGS. 3 to 5 show the overall structure of the stator 1 according to the present embodiment. The stator 1 is provided at one axial end of the stator main body 2 (the upper end in FIGS. 4 and 5). And a terminal block 3 described later. The stator main body 2 is configured by winding a plurality of windings 5 in this case via a bobbin 6 as an insulating member around a stator core 4. The stator core 4 is configured by connecting a teeth connecting body (not shown) in which four teeth cores are connected at an inner peripheral portion to a yoke core 4a having a substantially octagonal frame shape.

The bobbin 6 is made of, for example, a synthetic resin, and integrally has, at both ends of a substantially rectangular cylindrical body (not shown), flanges 6a, 6a having a rectangular shape with rounded corners. The winding 5 is wound around the trunk between the flanges 6a. The stator main body 2 is configured such that the four bobbins 6 on which the windings 5 are wound are fitted to the respective tooth cores of the tooth connected body, and then the tooth connected body and the yoke core 4 are joined together. Has become.

A pair of protrusions 7 are integrally provided at the upper end of the outer surface of the flange 6a located outside each bobbin 6, with a space left and right. A metal pin 8 is erected on a predetermined one of the protruding portions 7, and a winding end of each winding 5 is connected to the pin 8.
Power is supplied to each winding 5 through these pins 8. Note that, of the windings 5, for example, a pair of windings located in the front and rear in the figure are main windings, and a pair of windings located in the left and right in the figure are auxiliary windings.

Next, the terminal block 3 will be described with reference to FIGS.
This will be described with reference to FIGS. The terminal block 3 is shown in FIG.
As shown in FIG. 8 and the like, a power supply circuit section 9 having a shape in which the right end of the disk is cut linearly, and the circuit section 9
Connector 10 protruding rightward from the center of the right edge
And are integrally formed. Although not shown in detail, the connector section 10 is for connection to an external circuit (feeding path), and has terminals in a synthetic resin connector housing that opens to the right in the figure. As shown in FIG. 4, the connector section 10 has an upper surface substantially flush with the circuit section 9 and the connector housing is connected to the circuit section 9.
It is formed so as to bulge downward by an amount larger than the thickness.

In this case, the terminal block 3 is made of synthetic resin.
It is configured by insert-molding a conductor (not shown as a whole) made of a metal plate. In the circuit portion 9, three terminal portions 11 to which the pins 8 are connected and two capacitor connecting portions 13 to which a capacitor 12 to be described later are connected are exposed among the conductors. Accordingly, the terminal of the connector section 10 is also integrally formed. Thus, the conductor is provided so as to perform required connection between the terminals of the respective terminal portions 11, the capacitor connection portions 13, and the connector portions 10. The terminal portion 11 is provided with a hole 11a through which the upper end of the pin 8 is inserted, which is sufficiently large in diameter with respect to the pin 8.

A circular hole 3a through which a rotor (rotating shaft and bearing) is inserted is formed in the center of the terminal block 3. 6 of the circular hole 3a of the terminal block 3 (circuit section 9).
In the lower left portion, a capacitor mounting portion 14 described later is formed. As shown in FIG. 1, the pair of capacitor connecting portions 13 are provided on both sides of the circular hole 3 a so as to face the capacitor mounting portion 14.

Further, on the outer peripheral portion of the terminal block 3, for example, four fixing legs 15 (see FIGS. 4 and 5) extending downward including the lower surface side of the connector portion 10 at intervals of approximately 90 degrees. Is provided. These fixing legs 15 are fitted between a pair of protrusions 7 provided on the flange 6 a of each bobbin 6. Although not shown in detail, a locking claw is formed on one of the fixing legs 15 (for example, one formed on the lower surface of the connector unit 10) among the fixing legs 15. It is designed to be locked in a state where it cannot be pulled upward.

Now, the capacitor 12 and the capacitor mounting portion 14 will be described in detail. As shown in FIG. 1, FIG. 8, FIG.
6, and has two leads 12a protruding from both ends of the front end surface (the right side surface in FIG. 1) of the package 16. As shown in FIG. 2, a mounting leg 16 a extending downward is provided integrally on the lower surface of the package 16 at an end opposite to the side having the lead 12 a. The attachment leg 16a extends in a tongue shape having a certain thickness, and an engagement hole 16b as an engaged portion is formed at a lower end thereof.

On the other hand, as shown in FIGS. 1, 9 and the like, the capacitor mounting portion 14 formed on the terminal block 3
The second package 16 is formed in a substantially rectangular concave shape corresponding to the outer shape of the package 16. As shown in FIGS. 2, 6, and 7, the bottom wall portion 14a of the capacitor mounting portion 14 is located at an outer portion corresponding to the mounting leg 16a of the capacitor 12, and has the mounting leg 16a. A rectangular insertion hole 14b to be inserted from above is formed.

Further, the capacitor mounting portion 14 is located on the lower surface side of the bottom wall portion 14a and continuously downward (in the insertion direction) from the edge portion (right edge portion in FIGS. 2 and 7) of the insertion hole 14b. Is integrally provided. An engagement projection 17a as an engagement portion is provided below the mounting piece 17 so as to protrude inward of the insertion hole 14b. In this case, the attachment piece 17 is provided with a thickness that allows a slight elastic deformation, and the engagement projection 17a is formed in a spherical shape.

The capacitor 12 is mounted on the bottom wall portion 14a of the capacitor mounting portion 14 by inserting the mounting leg 16a of the package 16 into the insertion hole 14b. At this time, as shown in FIGS. 1 and 2, the mounting projection 16 a of the mounting piece 17 is attached to the mounting leg 16.
The engagement hole 16b of a is engaged. At this time, the capacitor 1 is formed by the concave capacitor mounting portion 14.
By taking the position of position 2 one step down, FIG.
As shown in FIG.
a is placed on the upper surface of each capacitor connecting portion 13 in a mounted manner.

The depth of the recess of the capacitor mounting portion 14 is as follows.
As described above, the lead 12a of the capacitor 12 is placed on the upper surface of the capacitor connection portion 13, and at the same time, as shown in FIG. 1) is set. As a result, the lower surface (back surface) of the bottom wall portion 14a comes into contact with the upper end portion of the flange portion 6a of the bobbin 6. Further, the mounting leg 16a and the mounting piece 17 projecting downward from the bottom wall 14a are located in a gap between the windings 5 (bobbins 6).

Next, the operation of the above configuration will be described. When attaching the capacitor 12 to the terminal block 3, as described above, the mounting legs 1 formed integrally with the package 16 are used.
6a is inserted into the insertion hole 14b of the capacitor mounting portion 14 from above. Then, as shown in FIGS. 1 and 2 and the like, the engaging hole 16b of the mounting leg 16a is engaged with the engaging convex portion 17a of the mounting piece portion 17, so that the capacitor 12 is connected to the terminal block 1
3 in a fixed state. The fitting in the horizontal direction of the capacitor 12 is, of course, performed by fitting the mounting leg 16a into the insertion hole 14b.

At this time, due to the elastic deformation of the mounting piece 17, the spherical engaging projection 17a relatively moves to the mounting leg 16a.
Easily crosses the front end portion and is engaged with the engagement hole 16b. In addition, since the engagement projection 17a has a spherical shape, the engagement can be performed smoothly, and the engagement can be easily released even when it is necessary to remove the capacitor 12.

Thereafter, each lead 12a of the capacitor 12
Is connected to each of the capacitor connecting portions 13 by, for example, spot welding, thereby completing the electrical connection, thereby forming the power supply circuit portion 9. At this time, as shown in FIGS.
Is mounted on the capacitor mounting portion 14 such that the lead 12a is placed on the upper surface of the capacitor connecting portion 13, so that it is not necessary to form the lead 12a,
The spot welding operation can be easily performed.

The terminal block 3 configured as described above is attached to the upper end of the stator main body 2. In this attachment, as shown in FIGS. 4 and 5, the four fixing legs 15 provided on the lower surface of the terminal block 3 are connected to the flanges 6a of the bobbins 6.
Is fitted so as to cover from above from between the protruding portions 7 on the outer surface side. By pushing in until the bottom of the terminal block 3 comes into contact with the upper end of the flange 6 a, the fixing leg 15 is sandwiched between the protruding portions 7, and one fixing leg 15 is formed. Are locked by the protruding portions 7, so that the terminal block 3 is restricted from moving in the horizontal direction and is mounted so as not to be pulled upward.

With the attachment of the terminal block 3, the upper end of each pin 8 on the stator body 2 side is inserted into the hole 11 a of each terminal 11 of the circuit section 9, In this state, each pin 8 and each terminal portion 11 are electrically connected, for example, by soldering. Thus, the stator 1 capable of supplying power to the winding 5 via the connector section 10 and the circuit section 9 of the terminal block 3 is completed.

At this time, as shown in FIG. 4, the lower surface of the connector portion 10 comes into contact with the upper end of the flange portion 6a of the bobbin 6 located on the right side, and the capacitor mounting portion 14 (bottom wall) bulging downward. The lower surface of the portion 14a) is the flange 6 of another bobbin 6.
The position of the terminal block 3 in the vertical direction with respect to the stator body 2 is regulated by abutting on the upper end of the terminal a. Therefore, the capacitor mounting portion 14 can contribute to the positioning of the terminal block 3 with respect to the stator main body 2.

In this case, the mounting leg 16a and the mounting piece 17 of the capacitor 12 project downward from the bottom wall portion 14a of the capacitor mounting portion 14, but as shown in FIGS. Is located in the gap between the windings 5 (bobbins 6), so that a so-called dead space can be effectively used, and the axial direction (vertical direction) of the stator 1
The size of is not enlarged.

As described above, according to the present embodiment, the capacitor 12 is mounted on the terminal block 3 provided on the stator body 2, and the capacitor 12 is mounted on the package 16 having the engagement hole 16b. The capacitor mounting portion 14 of the terminal block 3 has an insertion hole 14b and an engagement projection 17a.
Since the mounting piece 17 having the above-mentioned structure is integrally provided, the capacitor 12 can be fixed by the engagement between the engagement hole 16b and the engagement projection 17a.

Accordingly, it is not necessary to use a separate component such as an adhesive or a screw as in the conventional case, and the mounting leg 1 is not required.
The capacitor 12 can be mounted by a very simple operation of merely inserting the capacitor 6a into the insertion hole 14b, so that the capacitor 12 can be mounted easily and inexpensively.

In the present embodiment, the mounting piece 17 of the terminal block 3 is located in the gap between the windings 5.
The space in the gap between the windings 5 can be effectively used, and the axial dimension of the stator 1 can be prevented from becoming unnecessarily large. Further, the capacitor mounting part 1
4 is formed in a concave shape, so that the lead 12a of the capacitor 12 is placed on the capacitor connecting portion 13, so that the forming of the lead 12a becomes unnecessary, and the work of electrically connecting to the capacitor connecting portion 13 is performed. Can be easily performed. In addition, at this time, since the lower surface of the capacitor mounting portion 14 is configured to contact the upper end portion of the bobbin 6, the capacitor mounting portion 14 can contribute to the positioning of the terminal block 3 with respect to the stator main body 2. Can be obtained.

FIG. 10 shows another embodiment (corresponding to claim 2) of the present invention. This embodiment is different from the first embodiment in that the mounting piece 17 of the inner edge of the insertion hole 12b formed in the bottom wall 14a of the capacitor mounting portion 14 is provided.
The two ribs 21 are formed on the side (the left side in the figure) opposite to.

In such a configuration, even when the thickness of the mounting leg 16a in the left-right direction in the drawing is small, the rib 21 and the mounting piece 17 side can be fixed without play, and the mounting leg 16a can be fixed. Even if the thickness is large, the rib 2
By collapsing 1, it can also be fixed without rattling. Therefore, a dimensional error between the insertion hole 14b and the mounting leg 16a can be absorbed by the rib 21,
Even if their dimensions vary, they can be fixed firmly without play.

In each of the above embodiments, the engaging hole 16b is formed as the engaged portion in the mounting leg 16a. However, the engaged portion may be a hole (recess) having a bottom. Also, the engaging portion on the mounting piece 17 side is not limited to the spherical engaging convex portion 17b, and may be a claw shape or the like. Various modifications are possible for the configuration of the legs and the mounting piece. Also, the insulating member on the stator body 2 side is not limited to the bobbin 6, and may be an insulating cover that covers the entire stator core (teeth core).

In addition, the present invention is not limited to the above-described embodiment. For example, the present invention can be applied not only to a motor for a fan device but also to various types of motors. The shape and structure of the slave main body, the number of windings, and the like can be variously modified.

[0040]

As apparent from the above description, the present invention has the following excellent effects. That is, according to the motor stator of the first aspect, the capacitor is mounted on the terminal block provided on the stator main body. The capacitor is integrated with the mounting leg having the engaged portion in the package. In addition to being formed from a protruding mold type, an insertion hole into which a mounting leg is inserted is formed in the capacitor mounting portion of the terminal block, and is engaged so as to extend in the insertion direction from an edge of the insertion hole. The capacitor is attached to the terminal block by integrally providing a mounting piece having a portion, inserting the mounting leg into the insertion hole and engaging the engaged portion with the engaging portion, so that the capacitor can be mounted on the terminal block. It can be performed easily and inexpensively. Moreover, the capacitor mounting part
Capacitor leads are placed on the capacitor connection part
The capacitor lead for
No need for trimming and electrical connection to capacitor connection
Work can be performed easily.

In this case, if a rib is formed on the inner edge of the insertion hole facing the mounting piece, the dimension between the insertion hole and the mounting leg can be increased. Errors can be absorbed by the ribs, and the mounting legs can be more firmly fixed. Also, the mounting piece of the terminal block
Positioning in the gap between the windings (the stator of the motor according to claim 3) makes it possible to effectively use the space between the windings and suppress an increase in the axial dimension of the stator. Can be.

[0042] Further, the rear surface of the capacitor mounting portion, be configured so as to abut the end of the insulating member (stator according to claim 4 motor), a capacitor mounting portion, for the terminal block of the stator body This can contribute to positioning.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention and is a longitudinal sectional view of a capacitor mounting portion.

FIG. 2 is an enlarged longitudinal sectional view of a main part.

FIG. 3 is a plan view of a stator.

FIG. 4 is a front view of a stator.

FIG. 5 is a side view from the direction of arrow A in FIG. 3;

FIG. 6 is a plan view of a terminal block.

FIG. 7 is a diagram showing an enlarged plan view (a) and an enlarged vertical sectional view (b) of an insertion hole portion side by side.

FIG. 8 is a plan view of a terminal block with a capacitor mounted.

FIG. 9 is a side view from the direction of arrow B in FIG. 8;

FIG. 10 is a diagram corresponding to FIG. 7, showing another embodiment of the present invention.

[Explanation of symbols]

In the drawing, 1 is a stator, 2 is a stator body, 3 is a terminal block, 4
Is a stator core, 5 is a winding, 6 is a bobbin (insulating member), 6
a is a flange, 7 is a protrusion, 8 is a pin, 9 is a circuit, 10 is a connector, 11 is a terminal, 12 is a capacitor, 12a
Is a lead, 13 is a capacitor connecting portion, 14 is a capacitor mounting portion, 14b is an insertion hole, 15 is a fixing leg, 16 is a package, 16a is a mounting leg, 16b is an engaging hole (engaged portion), 17 is A mounting piece portion, 17a is an engagement convex portion (engagement portion),
21 indicates a rib.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 17/08 H02K 11/00

Claims (4)

(57) [Claims] A conductor is insert-molded with resin at one end in the axial direction of a stator body in which a plurality of windings are wound around a stator core via an insulating member. A terminal block which constitutes a circuit part for supplying power to the winding by connecting a capacitor is provided, wherein the capacitor is provided such that mounting legs having an engaged portion are integrally formed on a package. And a capacitor mounting part on the terminal block.
The capacitor is placed on the capacitor connection part.
To provided, on its capacitor mounting portion, provided with a mounting piece portion having an engagement portion as the mounting legs extend in the insertion direction from the edge of the insertion hole is formed and the insertion hole to be inserted together, the A motor stator, wherein the capacitor is mounted on the terminal block by inserting the mounting leg into the insertion hole and engaging the engaged portion with the engaging portion. 2. The motor stator according to claim 1, wherein a rib is formed at an inner edge of the insertion hole facing the mounting piece. 3. The motor stator according to claim 1, wherein the mounting piece of the terminal block is located in a gap between the windings. 4. The back surface of the capacitor mounting portion is formed of an insulating member.
The motor stator according to any one of claims 1 to 3, wherein the stator is in contact with an end .