JP3497684B2 - Rotating electric machine 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 stator of a rotary electric machine having a structure in which a coil and an external circuit are connected by an insulating base.

[0002]

A conventional structure of the above stator will be described with reference to FIGS. 24 to 26. This stator is disclosed in Japanese Patent Application Laid-Open No. 6-20 filed by the present applicant.
This is disclosed in Japanese Patent No. 5558. First, FIG.
25, the stator core 1 is covered with the insulator 2 made of synthetic resin from both sides in the axial direction (only one insulator 2 is shown), and each slot 1 of the stator core 1 is covered.
The inner peripheral surface of a is covered with both insulators 2.

A plurality of pins 3 are mounted on one of the insulators 2, and each of these pins 3 is, as shown in FIG.
The external connection terminal wire 4a of the coil 4 is wound. A conductive member 7 is embedded in the insulating base 6 (see FIG. 24), and when the insulating base 6 is attached to the insulator 2, the pins 3 are attached to the holes 7a of the conductive member 7 and the insulating base 6. It projects through the hole 6a.

In the case of the above structure, when connecting the coil end wire 4a to an external circuit, solder is dropped into the hole 6a of the insulating base 6 to connect the pin 3 and the conductive member 7, and then the conductive member 7 is connected. The external circuit is connected. Therefore,
Since it is necessary to perform troublesome soldering work, there is room for improvement in terms of assembly workability. The present invention has been made in view of the above circumstances, and an object thereof is to provide a stator of a rotary electric machine that can easily connect a coil terminal wire for external connection to an external circuit.

[0005]

According to a first aspect of the present invention, there is provided a stator for a rotating electric machine, comprising: a resin-made insulator mounted on a stator core; a coil wound on the stator core from above the insulator; and a resin insulating base which is attached to the body, outside the connector portion to which the connector is fitted in the external circuit formed in the insulating base, said one end portion provided in the insulating base located in the connector portion A conductive member for connection ,
Almost U-shaped attached to the insulator and connected to the coil terminal wire
-Shaped terminals and engaging portions formed on the inner and outer peripheral portions of the insulator
And each of the insulators formed on the inner and outer peripheral portions of the insulating base.
When the other end of the conductive member is
An engaged portion connected to the terminal, one of the terminals
The other end of the conductive member is pressed against the wall of the other side of the wall.
Is formed, and the both engaging portions or the both covered portions are formed.
The engagement part has different rigidity, and one of the walls of the terminal has rigidity.
Located on the side of the small engaging part or the engaged part and the other wall
Part is located on the side of the engaged part or the engaged part with high rigidity
Characterized in the Rutokoro already mounted in the insulator so.

According to the above means, the coil terminal wire for external connection is connected to the external circuit on the basis of performing the work of (1) and (2) below. (1) As the insulating base is attached to the insulator of the stator core, the other end of the conductive member is connected to the coil terminal wire for external connection. (2) One end of the conductive member is connected to the external circuit by fitting the connector of the external circuit into the connector of the insulating base. Therefore, it is not necessary to solder the coil terminal wire for external connection, so that the assembling workability is improved. Well
Also, engage the engaged part of the insulation base with the engaged part of the insulator.
Along with this, the insulating base is attached to the insulator. in this case,
Since the insulation base is held inside and outside, insulation of the insulation base
Rattling against the body is prevented. In addition, each of the insulation base
When the engaging part engages with the engaged part of the insulator,
The end is connected to the coil terminal wire via the terminal. This and
, The engaging part or the engaged part with low rigidity is elastically deformed.
Insulation base to the side of the engaged part or the engaged part with high rigidity
Move the other end of the conductive member together with the insulating base.
The pressure portion is displaced from the base end portion toward the tip end portion.
Therefore, excessive pressing force is applied from the other end of the conductive member to the pressing part.
Is prevented, and the pressing portion is prevented from being deformed.

In the stator of a rotating electric machine according to a second aspect of the present invention, a conductive member for common connection, which is connected to a coil terminal wire for common connection, is provided on the insulating base as the insulating base is mounted on the insulator. It is characterized by the fact that it is used. According to the above means, when the insulating base is attached to the insulator, the conductive member for common connection is connected to the coil terminal wire. Therefore,
Since it is not necessary to solder the coil connection wire for common connection, the assembly workability is further improved.

A stator of a rotating electric machine according to a third aspect is characterized in that a heat-sensitive element is provided on an insulating base and the heat-sensitive element is arranged in the vicinity of a common connecting conductive member. According to the above means, it is not necessary to provide a heat sensitive element corresponding to the coil terminal wire of each phase, so that the heat sensitive element can be commonly used.

According to a fourth aspect of the present invention, the stator of the rotating electric machine is equipped with a terminal which penetrates the outer sheath of the coil terminal wire and is connected to the core wire when the stator is mounted on the insulator, and the insulating base is mounted on the insulator. Accordingly, the other end of the conductive member is connected to the terminal, and a relief groove wider than the outer diameter of the thickest coil terminal wire that can be used is formed at the other end of the conductive member. Have. According to the above means, the following (1)
Based on performing the work of (2) and (2), the coil terminal wire is connected to the conductive member. (1) As the terminal is attached to the insulator, the jacket of the coil terminal wire is pierced by the terminal, and the terminal is connected to the core wire of the coil terminal wire. (2) As the insulating base is attached to the insulator, the other end of the conductive member is connected to the terminal.

Therefore, it is not necessary to remove the outer sheath of the coil terminal wire in advance, so that the assembling workability is further improved. Moreover, the coil end wire can be escaped by the escape groove formed at the other end of the conductive member. For this reason, the overlapping portion between the other end of the conductive member and the terminal increases, so that poor contact between the two is prevented. Further, since the width dimension of the escape groove is set to be larger than the outer diameter dimension of the thickest coil terminal wire that can be used, it is not necessary to replace the conductive member even when the coil terminal wire having a large diameter is used. Therefore, the insulating base can be commonly used.

A stator of a rotating electric machine according to a fifth aspect is characterized in that a wall portion surrounding each coil terminal wire is formed on an insulating base. According to the above means, since each coil terminal wire is surrounded by the wall portion, erroneous contact of each coil terminal wire is prevented.

A stator of a rotating electric machine according to a sixth aspect is characterized in that a wall portion surrounding a plurality of coil terminal wires is formed on an insulating base, and a heat sensitive element is provided in the wall of the insulating base. Have. According to the above means, the heat generated from the plurality of coil terminal wires does not easily escape to the outside of the wall portion, so that the sensitivity of the heat sensitive element is improved.

[0013]

According to a seventh aspect of the present invention, there is provided a stator for a rotating electric machine, wherein a leg portion for mounting the insulating base on the insulator is formed on either one of the insulator and the insulating base, and the leg portion is circumferentially arranged. It is characterized in that the contacting wall is formed on the other side. According to the above means, rattling of the insulating base with respect to the insulator due to the contact of the wall portion with the leg portion from the circumferential direction is prevented.

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will now be described with reference to FIG.
Or, it demonstrates based on FIG. In this embodiment, the present invention is applied to the stator of the outer rotor type DC brushless motor that rotates the pulsator and the washing tub of the washing machine. First, in FIG. 2, the stator core 1
1 is configured by connecting three arc-shaped unit cores 12, and each unit core 12 is formed by stacking steel plates.

The insulating cover 13, which corresponds to an insulator, is made of a non-conductive synthetic resin (specifically, polybutylene terephthalate containing 30% of glass filler) and has a plurality of radially extending insulating layers 13a. , And a connecting portion 13b for connecting the inner peripheral portions of these insulating layers 13a. Each insulating layer 13a has a U-shaped cross section, and the insulating cover 13 is formed on the stator core 11 from both sides in the axial direction.
When you push in, the teeth 11a of the stator core 11
One insulating layer 13a is covered. As a result, the inner peripheral surface of each slot 11b of the stator core 11 is covered with the two insulating covers 13.

As shown in FIG. 1, the coils 11 are formed on the teeth 11a of the stator core 11 from above the insulating layer 13a.
4 is wound. The plurality of coils 14 are composed of three coil wires 15, and as shown in FIG.
Each coil wire 15 is formed by covering a conductive wire 15a corresponding to a core wire with a coating film 15b corresponding to a jacket.

As shown in FIG. 6, on the upper surface of one insulating cover 13, the mounting portion 16 is located at the inner peripheral portion and the outer peripheral portion.
2 are formed integrally. Each of these mounting portions 16 corresponds to an engaging portion, and is composed of legs 16a and 16b as shown in FIG. As for each mounting portion 16 on the inner peripheral side (right side in the drawing), each leg 16a located on the inner peripheral side is integrally formed with a claw portion 16c protruding inward, and each mounting portion on the outer peripheral side (left side in the drawing). Regarding the portion 16, a claw portion 16c protruding outward is integrally formed with each leg portion 16a located on the outer peripheral side.

The insulating base 17 shown in FIG. 8 is made of a non-conductive synthetic resin (specifically, polybutylene terephthalate containing 30% of glass filler). The attached parts 18 each having a rectangular frame shape are integrally formed at the corners. Each of these attached portions 18 corresponds to the engaged portion and the wall portion, and as shown in FIG. 7, each attached portion 18 located on the inner peripheral side (right side in the drawing) has an inner peripheral side. An L-shaped groove portion 18a (see FIG. 9) is formed on the wall portion, and each attached portion 18 located on the outer peripheral side has an L-shaped groove portion on the outer peripheral side wall portion. 18a (see FIG. 9) is formed.

When each mounted portion 18 of the insulating base 17 is pushed into the outer side of the mounting portion 16 of the insulating cover 13, the inner surface of each mounted portion 18 presses the engaging projection 16c of the mounting portion 16. Then, the leg portions 16a of the mounting portions 16 are elastically deformed.
As a result, the respective engaging protrusions 16c are formed in the groove portion 1 of the mounted portion 18.
The insulating base 17 is attached to the insulating cover 13 by engaging with 8a. At the same time, the inner surface of each mounted portion 18 is attached to the mounting portion 16
The leg portions 16a and 16b are contacted in the circumferential direction (the depth direction of the paper surface of FIG. 7).

On the upper surface of the insulating cover 13, as shown in FIG. 6, six accommodating portions 19 having a rectangular frame shape are integrally formed. The plurality of accommodating portions 19 are arranged side by side on the inner peripheral portion of the insulating cover 13, and the inner peripheral wall portion and the outer peripheral wall portion of each of the accommodating portions 19 are, as shown in FIG. The groove portion 19a is formed. Then, one end portion (terminal portion for external connection) of the coil wire 15 is inserted into the groove portions 19a, 19a of the three housing portions 19 on the left side of FIG. 6, and the groove portions 19a, 19a of the remaining three housing portions 19 are inserted. The other end portion (terminal portion for common connection) of the coil wire 15 is inserted.

As shown in FIG. 4, a taper portion 19b is formed in each accommodation portion 19 at the tip of the groove portion 19a, and the end portion of each coil wire 15 is formed by the taper portion 19b. Grooves 19a, 1 along with being guided
It is smoothly inserted into 9a.

In each of the accommodating portions 19, as shown in FIG.
A terminal 20 formed by bending a metal plate is housed.
As shown in FIGS. 3 and 4, each of these terminals 20 has a substantially U shape in which vertically extending connecting portions 20a and 20b are connected by a base portion 20d, and one connecting portion 20a has one , Claw-shaped pressing portion 2 extending obliquely downward
0c is formed. Incidentally, the connecting portions 20a and 20b
Corresponds to the wall of the terminal 20.

The connecting portions 20a and 20b of each terminal 20,
Grooves 20e are formed in the base portion 20d, and the width W of each groove 20e is smaller than the outer diameter r1 of the coil wire 15 as shown in FIG.
It is set to be substantially equal to the diameter dimension r2 of 5a. Therefore, when the terminal 20 is inserted into each accommodation portion 19, each groove portion 2
The inner surface of 0e breaks through the coating 15b of the coil wire 15,
It comes into contact with the conductive wire 15a.

The width dimension W of the groove portion 19a of each accommodation portion 19
1 (see FIG. 4) is set to be larger than the diameter of the thickest one of the various coil wires 15 that can be used. Further, as shown in FIG. 4, each terminal 20 has a connecting portion 20a.
And 20b are formed with claw portions 20f,
As the claw portions 20f are hooked on the inner surface of the housing portion 19, the terminals 20 are prevented from coming off the housing portion 19.

On the lower surface of the insulating base 17, as shown in FIG. 8, six accommodating portions 21 having a rectangular frame shape are integrally formed. These accommodating portions 21 are arranged side by side along the inner peripheral portion of the insulating base 17, and when the insulating base 17 is attached to the insulating cover 13, the accommodating portions 19 of the insulating cover 13 of FIG. The housing portion 21 is fitted on the outside. In addition, each housing portion 21 of the insulating base 17 corresponds to a wall portion,
An escape groove 21a for escaping the coil wire 15 is formed in each accommodation portion 21.

As shown in FIG. 1, the insulating base 17 has three conductive plates 22 and 1 for external connection corresponding to conductive members.
Two common connecting conductive plates 23 are embedded, and one end of each conductive plate 22 is formed with a connecting portion 22a that bends downward, as shown in FIG. Has three connecting portions 23a that are bent downward. The connecting portions 22a of the three conductive plates 22 are shown in FIG.
As shown in FIG. 5, the three connecting portions 23 a of the conductive plate 23 project into the left three housing portions 21, and the three connecting portions 23 a of the conductive plate 23 project into the remaining three housing portions 21.

Therefore, the insulating base 17 is attached to the insulating cover 13, and each accommodation portion 21 of the insulating base 17 is attached to the insulating cover 13.
When fitted into the accommodation portion 19 of FIG.
Connection part 22a of each conductive plate 22 and each connection part 2 of the conductive plate 23
3a is inserted between the connecting portion 20b of the terminal 20 and the pressing portion 20c, and is connected to the connecting portion 20b and the pressing portion 20c. At the same time, the pressing portion 20c presses the connecting portion 20b.

As shown in FIG. 5, the connecting portions 22a of the conductive plates 22 and the connecting portions 23a of the conductive plates 23 are formed with escape grooves 22b and 23b which open downward.
These relief grooves 22b and 23b are for allowing the coil wire 15 to escape, and the width dimension W2 of each relief groove 22b and 23b is set to be larger than the outer diameter dimension of the thickest one of the various coil wires 15 that can be used. ing.

As shown in FIG. 1, temperature detecting conductive plates 24 and 25 are embedded in the insulating base 17. These conductive plates 24 and 25 are arranged in the vicinity of the conductive plate 23 so as to surround the common connection conductive plate 23. At one end of the conductive plates 24 and 25, as shown in FIG. Connection parts 24a and 25a are formed.
Then, these connecting portions 24a and 25a are exposed to the outside through the lower surface of the insulating base 17, as shown in FIG.

As shown in FIG. 9, an element mounting portion 26 is integrally formed on the lower surface of the insulating base 17, and the element mounting portion 26 is formed of a thermistor as shown in FIG. 27 body parts are fitted. Both lead wires of the thermosensitive element 27 are spot-welded to the connecting portion 24a of the conductive plate 24 and the connecting portion 25a of the conductive plate 25. Further, a frame-shaped wall portion 28 is integrally formed on the lower surface of the insulating base 17, and the wall portion 28 surrounds the heat-sensitive element 27 of the insulating base 17 and the six accommodating portions 21.

As shown in FIG. 9, a rectangular tubular connector portion 29 is integrally formed on the outer peripheral portion of the insulating base 17, and as shown in FIG. 1, three external connection conductive plates 22 are provided.
The other end of each of the temperature detecting conductive plates 24 and 25 is located in the connector part 29. Therefore, when a connector (not shown) for the external circuit is fitted into the connector portion 29,
The three conductive plates 22 and the conductive plates 24 and 25 are connected to an external circuit. Reference numerals 22c, 24c and 25c denote terminal portions (other end portions) of the conductive plates 22, 24 and 25.

Conductor plates 30 to 34 for rotor position detection are embedded in the insulating base 17. Then, the conductive plates 30 to 3
2, the connecting portions 30a to 32a are formed on the conductive plate 33 and 34, and the connecting portions 33a to 3a are formed on the conductive plates 33 and 34, as shown in FIG.
3c and 34a to 34c are formed, and the connecting portions 30a to 34c are exposed to the outside through the lower surface of the insulating base 17. The conductive plates 22 to 25 and 30 to 34 are embedded in the insulating base 17 as they are housed in the cavity when the insulating base 17 is molded (so-called insert molding).

On the lower surface of the insulating base 17, as shown in FIG. 9, three element mounting portions 35 are integrally formed at the outer peripheral portion. Each of these mounting portions 35 has a rectangular frame shape, and as shown in FIG. 8, a main body of a Hall element 36 corresponding to a position detecting element is fitted in each mounting portion 35. Each of these Hall elements 36 is for detecting the rotational position of the rotor, and the lead wires of each Hall element 36 have their respective connecting portions 30a to 34c as shown in FIG.
Is soldered to.

Connection parts 33d and 34d are formed on the conductive plates 33 and 34 as shown in FIG.
The connecting portions 33d and 34d are exposed to the outside through the lower surface of the insulating base 17. Then, the connecting portions 33d and 3
As shown in FIG. 11, the lead wire of the capacitor 37 is soldered to 4d. The capacitor 37 removes noise from the power source supplied to each Hall element 36.

As shown in FIG. 1, a rectangular tubular connector portion 38 is integrally formed on the insulating base 17. Then, one ends of the conductive plates 30 to 34 are located in the connector part 38, and when the connector (not shown) of the external circuit is fitted into the connector part 38, the three hall elements 36 and the capacitors 37 are connected to the conductive plate. It is connected to an external circuit through 30 to 34. Incidentally, reference numerals 30b, 31b, 32 in FIG.
Reference numerals b, 33e, and 34e denote terminal portions (one end portions) of the conductive plates 30 to 34.

The lower surface of the insulating base 17 is shown in FIGS.
As shown in FIG. 3, a wall portion 39 having a rectangular frame shape is integrally formed, and the wall portion 39 surrounds the three Hall elements 36 and the capacitors 37. The wall 39 is potted with a moisture-proof material so that the electrodes of the Hall element 36 and the capacitor 37 are not exposed.

Next, a procedure for assembling the stator will be described. First, the groove portions 19a, 1 of the three housing portions 19 on the left side of FIG.
After inserting the external connection terminal portion of the coil wire 15 into 9a and inserting the common connection terminal portion of the coil wire 15 into the groove portions 19a, 19a of the remaining three accommodation portions 19, each accommodation portion 19 is inserted.
Insert the terminal 20 therein. Then, as shown in FIG.
The inner surface of the groove 20e of each terminal 20 pierces the coating 15b of the coil wire 15 and contacts the conductive wire 15a, so that the coil 14 is connected to each terminal 20.

After the coil 14 is connected to each terminal 20, as shown in FIG. 7, each mounted portion 18 of the insulating base 17 is pushed into the outer side of the mounting portion 16 of the insulating cover 13 to insulate the insulating base 1.
7 is attached to the insulating cover 13. Then, in FIG. 3, the connection portion 22a of each conductive plate 22 and each connection portion 23a of the conductive plate 23 are inserted between the connection portion 20b of the terminal 20 and the pressing portion 20c, and the three conductive plates 22 and the conductive plate 23 are inserted. Is connected to the terminal 20.

After connecting the three conductive plates 22 and 23 to the terminal 20, the connector of the external circuit is fitted to the connector portion 38 of the insulating base 17 in FIG. Then,
The three Hall elements 36 and the capacitor 37 are the conductive plate 3
It is connected to an external circuit via the terminal parts 30b-34e of 0-34. At the same time, another connector of the external circuit is fitted to the connector portion 29 of the insulating base 17. Then,
As the terminals 22c of the three conductive plates 22 and the terminals 24c and 25c of the conductive plates 24 and 25 are connected to the external circuit, each coil 14 is connected to the external circuit via the terminals 20, the conductive plates 22 and 23. The heat-sensitive element 27 is connected to the external circuit via the conductive plates 24 and 25.

According to the above-mentioned embodiment, as the insulating base 17 is mounted on the insulating cover 13, the coil terminals for external connection are connected to the conductive plates 22 of the insulating base 17. For this reason, it is not necessary to solder each coil wire for external connection to the conductive plate 22, so that the assembling workability is improved, and as a result, the work time is shortened. Moreover, since the equipment for soldering the coil terminal wire for external connection is not required,
Equipment costs are reduced. Furthermore, since the soldered portion of the external connection coil terminal wire exposed to the outside is eliminated, the tracking property is improved.

Further, as the insulating base 17 was mounted on the insulating cover 13, the common connection coil terminal wire was connected to the conductive plate 23 of the insulating base 17. Therefore, the labor for twisting the common connection coil terminal wires and the labor for soldering to the conductive plate 23 are eliminated, so that the assembling workability is further improved, and as a result, the work time is greatly shortened. Moreover,
Since the equipment for soldering the common connection coil terminal wire is not required, the equipment cost can be further reduced. Further, the heat sensitive element 27 is arranged near the common connecting conductive plate 23. Therefore, it is not necessary to provide the heat sensitive element 27 corresponding to the coil terminal wires of each phase, and the heat sensitive element 27 is commonly used.

When the terminal 20 is inserted into the accommodating portion 19, the groove 20e of the terminal 20 is inserted into the coating 15b of the coil wire 15.
And the terminal 20 is connected to the conductive wire 15a of the coil wire 15. For this reason, it is not necessary to remove the coating film 15b on the end portion of the coil wire 15 in advance, so that the assembling workability is further improved.

Further, the escape grooves 22b and 23 are formed in the connecting portions 22a of the conductive plates 22 and the connecting portions 23a of the conductive plates 23, respectively.
b was formed. Therefore, each connection portion 22a and 23a
However, since the coil wire 15 escapes the terminal portion of the coil wire 15 and is deeply inserted into the terminal 20, the overlapping portion between each connecting portion 22a and the terminal 20 and the overlapping portion between each connecting portion 23a and the terminal 20 increase. As a result, poor contact between the two is prevented.

The width W2 of each of the relief grooves 22b and 23b is set to be larger than the outer diameter of the thickest one of the various coil wires 15 that can be used. Therefore, even if the wire diameter changes due to the change of the coil wire 15, it is possible to deal with it only by exchanging the terminal 20, and it is not necessary to exchange the conductive members 22 and 23, so that the insulating base 17 can be commonly used. .

Further, each accommodating portion 21 of the insulating base 17 is fitted to the outside of the accommodating portion 19 of the insulating cover 13. For this reason,
Since each coil terminal wire is surrounded by the housing portion 21, erroneous contact between the coil terminal wires and the like is prevented. Further, the six accommodating portions 21 of the insulating base 17 are surrounded by the wall portion 28, and the heat sensitive element 27 is arranged in the wall portion 28. For this reason, if the insulating base 17 is attached to the insulating cover 13,
The coil end wire of the book is surrounded by the wall portion 28. Therefore, the heat generated from the three coil terminal wires is trapped inside the wall portion 28 and is difficult to escape to the outside of the wall portion 28.
The sensitivity of the heat sensitive element 27 is improved.

Further, the insulating base 17 is attached to the insulating cover 13 by the mounting portions 16 formed on the inner and outer peripheral portions of the insulating cover 13.
Held in. For this reason, the insulating base 17 has the insulating cover 13
On the other hand, vertical and horizontal rattling is effectively prevented. Further, the attached portions 18 of the insulating base 17 were brought into contact with the respective attaching portions 16 of the insulating cover 13 from the circumferential direction. Therefore, the insulating base 17 is prevented from rattling laterally with respect to the insulating cover 13.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted, and only different members will be described below. First, FIG.
In, the terminal board 40 is flame retardant (tracking resistance)
And a synthetic resin excellent in strength (specifically, polybutylene terephthalate, PBT) is injection-molded in an arc shape, and a rectangular opening 40a is formed in the central portion of the terminal board 40 in the circumferential direction. 40a is formed.

On the upper surface of the terminal plate 40, there are integrally formed U-shaped wall portions 40b located at the peripheral portions of the respective opening portions 40a. The inner walls of these wall portions 40b are shown in FIG. As shown, it projects downward through the opening 40a. A claw portion 40c located at the tip end portion and projecting in the circumferential direction is integrally formed on the back wall of each wall portion 40b.

As shown in FIG. 14, notches 40d are formed at both ends of the terminal plate 40 in the circumferential direction. Each of these notches 40d is open to the inner peripheral side, and wall portions 40e and 40e are integrally formed at both circumferential edges of each notch portion 40d as shown in FIG. A wall 40f is integrally formed on the upper end of the. And each wall 40f is integrally formed with a leg wall 40g protruding downward through the cutout 40d.
As shown in FIG. 14, a claw portion 40h projecting to the outer peripheral side is integrally formed at the tip portion of the.

A plurality (= 6) of accommodating portions 40i are integrally formed on the upper surface of the terminal plate 40. Each of these accommodation parts 40
i is in the shape of a rectangular tube having an open upper surface, and the lower surface of the terminal board 40 has each housing 40i as shown in FIG.
A cylindrical positioning protrusion 40j is integrally formed on the lower side.

As shown in FIG. 13, the connecting portion 13b of one insulating cover 13 has a plurality of circular shapes (= 6).
Positioning holes 13c and a plurality of (= 4) engaging holes 13d having a rectangular shape are formed, and each positioning protrusion 40j of the terminal board 40 is inserted into the positioning hole 13c so that the terminal board 40 is When pushed into the side of the insulating cover 13, the claws 40c and 40h of the terminal plate 40 engage with one edge of the engaging hole 13d from the lower surface side, and as shown in FIG. Be attached to. The insulating cover 13 is made of heat-resistant synthetic resin (specifically, polyphenylene sulfite, PPS).

Each of the accommodating portions 40i of the terminal board 40 is shown in FIG.
As shown in FIG. 5, the groove 40k is formed at the inner and outer peripheral wall portions, and one end portion (terminal portion for external connection) of the coil wire 15 is inserted into both groove portions 40k of the predetermined accommodation portion 40i. The other end portion (terminal portion for common connection) of the coil wire 15 is inserted into both groove portions 40k of the remaining accommodation portion 40i.

As shown in FIG. 12, the terminal 20 is inserted into each accommodation portion 40i. Each of these terminals 20 is
One connecting portion 20a (having the pressing portion 20c) is inserted so as to face the inner peripheral side, and the other connecting portion 20b is inserted so as to face the outer peripheral side, and the conductive wire is pierced through the coating film 15b of the coil wire 15. It is connected to 15a.

As shown in FIG.
As shown in, the two engaging portions 41 are integrally formed at the inner peripheral portion, and the two engaging portions 42 are integrally formed at the outer peripheral portion. As shown in FIG. 12, each of the engaging portions 41 and 42 includes a leg portion 41 a and 42 a and a claw portion 4.
Each of the leg portions 42a on the outer peripheral side is thicker than the leg portions 41a on the inner peripheral side, has a smaller height dimension, and has higher rigidity.

On the lower surface of the insulating base 17, two engaged parts 43 are integrally formed at the inner peripheral part (only one is shown), and two engaged parts 43 are located at the outer peripheral part. The joining portion 44 is integrally formed (only one is shown). Each of these engaged parts 4
3 and 44 are leg portions 43a and 44a and claw portion 43.
b and 44b, each leg portion 44a located on the outer peripheral side is a leg portion 43a located on the inner peripheral side.
The height dimension is set larger.

On the lower surface of the insulating base 17, projecting support portions 45 and 46 are integrally formed at the inner peripheral portion and the outer peripheral portion. A projecting pad portion 47 is integrally formed on the upper surface of one of the insulating covers 13 at the inner peripheral portion, and as shown in FIG. 17, each of the accommodating portions 21 of the insulating base 17 is insulated. Inserted on the outside of the housing portion 40i of the cover 13,
When the insulating base 17 is pressed toward the insulating cover 13 side, as shown in FIG.
As shown in, the inner peripheral side support portion 45 and the outer peripheral side support portion 46 of the insulating base 17 contact the inner peripheral side contact portion 47 and the outer peripheral side leg portion 42a of the insulating cover 13.

As a result, the insulating base 17 becomes the insulating cover 1.
3, the claw portions 43b and 44b of the insulating base 17 are engaged with the claw portions 41b and 42b of the insulating cover 13, and the insulating base 17 is mounted on the insulating cover 13. Along with this, the connection portion 22a of each conductive plate 22
Also, each connecting portion 23a of the conductive plate 23 is connected to one connecting portion 20b of the terminal 20 and the pressing portion 20c, and further, the pressing portion 20c presses the connecting portion 20b side.

17 to 20 sequentially show how the insulating base 17 is mounted on the insulating cover 13. Here, when the insulating base 17 is pressed from the state shown in FIG. 17,
As shown in FIG. 18, the connecting portion 22 a of each conductive plate 22 and each connecting portion 23 a of the conductive plate 23 are connected to the pressing portion 20 of the terminal 20.
Guided by the inclination of c, the outer peripheral side (the engaging portion 42 having a large rigidity)
And moves to the side) and contacts the connecting portion 20b of the terminal 20.

Next, as shown in FIG. 19, the insulating base 17
Since the claw portions 43b located on the inner peripheral side of the abutting contact the claw portions 41b located on the inner peripheral side of the insulating cover 13, and a pressing force acts from the respective claw portions 43b to the claw portion 41b, Each leg portion 41a located on the circumferential side bends to the outer circumferential side. Then, as shown in FIG. 20, each claw portion 44b located on the outer peripheral side of the insulating base 17 abuts on the claw portion 42b located on the outer peripheral side of the insulating cover 13, and each claw portion 44b tilts the claw portion 42b. As it moves along the insulation base 17,
With respect to the outer peripheral side, the claw portions 43b and 44b of the insulating base 17 are separated from each other by the insulating cover 13 as shown in FIG.
Engages with the claw portions 41b and 42b.

According to the above embodiment, the rigidity of each engaging portion 42 located on the outer peripheral side of the insulating cover 13 is set to the inner peripheral side engaging portion 4.
Since it is set to be larger than 1, when the insulating base 17 is mounted on the insulating cover 13, each engaging portion 41 located on the inner peripheral side is elastically deformed mainly to the outer peripheral side. Therefore, the insulating base 17 is mounted on the insulating cover 13 while moving toward the outer peripheral side.

At this time, as shown in FIG. 21, each terminal 2
When the connecting portion 20a of 0 (having the pressing portion 20c) faces the outer peripheral side, as shown in FIG.
After the connection portion 22a of the above and each connection portion 23a of the conductive plate 23 are guided by the inclination of the pressing portion 20c and are displaced toward the inner peripheral side,
Moves to the outer circumference. Therefore, each connection portion 22a and 2
Since 3a moves from the tip end portion of the pressing portion 20c toward the base end portion thereof, as shown in FIG.
There is a risk that c may be crushed.

Incidentally, the rigidity of the inner peripheral side engaging portion 41 and the outer peripheral side engaging portion 42 is set to be substantially the same, and both engaging portions 41 and 42 are elastically deformed when the insulating base 17 is mounted. When adopted, the magnitude of the pressing force is smaller than that shown in FIGS. 21 to 23, but the pressing force acts from the tip end portion to the base end portion of the pressing portion 20c regardless of the orientation of the terminal 20. As a result, each pressing portion 20c may be crushed.

On the other hand, in the present embodiment, the connecting portion 20a of each terminal 20 is arranged on the side of the engaging portion 41 (inner peripheral side) having low rigidity, and the connecting portion 20b is provided on the side of the engaging portion 42 having large rigidity ( Since they are arranged on the outer peripheral side), when the insulating base 17 is attached, the respective connecting portions 22a and 23a move from the base end portion of the pressing portion 20c toward the tip end portion. Therefore, each connection part 2
Since an excessive pressing force does not act on the pressing portion 20c from 2a and 23a, the pressing portion 20c is prevented from being crushed.

By the way, in the case of the first embodiment, since the insulating cover 13 has a complicated shape having a plurality of accommodating portions 19, the fluidity of the resin is affected and the insulating cover 1
There are circumstances where it is difficult to mold # 3. As a countermeasure against this, it is conceivable to use PPS or the like having excellent moldability. However, since the surface of PPS is likely to be carbonized and tracking may occur, the entire insulating cover 13 is formed by PPS. Is difficult to do.

On the other hand, in this embodiment, the terminal plate 40 to which the terminal 20 is attached is formed of PBT having excellent tracking resistance and strength, and the insulating cover 13 is made of PPS having excellent moldability and heat resistance. Then, the terminal board 40 was separately attached to the insulating cover 13. Therefore, formability is improved while ensuring tracking resistance and strength.

In the second embodiment described above, the rigidity of the engaging portion 42 located on the outer peripheral side of the insulating cover 13 is made larger than that of the engaging portion 41 located on the inner peripheral side, but the present invention is not limited to this. Instead, for example, the rigidity of the engaged portion 44 located on the outer peripheral side of the insulating base 17 is set to the engaged portion 4 located on the inner peripheral side.
It may be larger than 3. Even in the case of this configuration, since the insulating base 17 moves to the outer peripheral side when mounted, each conductive plate 22
It is possible to prevent an excessive pressing force from being exerted on the pressing portion 20c of the terminal 20 from the connecting portion 22a of the above and each connecting portion 23a of the conductive plate 23.

Further, in the second embodiment, the rigidity of the engaging portion 42 located on the outer peripheral side of the insulating cover 13 is made larger than that of the engaging portion 41 located on the inner peripheral side, but the invention is not limited to this. Instead of, for example, the engaging portion 4 located on the inner peripheral side
The rigidity of No. 1 may be larger than that of the engaging portion 42 located on the outer peripheral side, or the rigidity of the engaged portion 43 located on the inner peripheral side may be greater than that of the engaged portion 44 located on the outer peripheral side. In the case of this configuration, since the insulating base 17 moves toward the inner peripheral side when mounted,
The terminal 20 is accommodated in the accommodating portion 4 so that the connecting portion 20a faces the outer peripheral side.
It is good to store it at 0i.

In the first and second embodiments, the heat sensitive element 27 is arranged near the common connecting conductive plate 23, but the invention is not limited to this. For example, the external connecting conductive plate 22. You may arrange between each other. In the case of this configuration, there is an advantage that the heat-sensitive element 27 reacts with high sensitivity even in the case of the open phase operation. In addition, the first and second
In the embodiment, the leg-shaped mounting portion 16 is attached to the insulating cover 13.
Although the frame-shaped mounted portion 18 is formed on the insulating base 17, the mounting portion 16 is formed on the insulating base 17 and the mounted portion 18 is formed on the insulating cover 13. It may be formed in.

In the first and second embodiments, the connector parts 29 and 38 are formed integrally with the insulating base 17, but the invention is not limited to this. For example, the connector parts formed separately. Insulating base 17 for 29 and 38
It may be attached later.

[0073]

As is apparent from the above description, the stator of the rotary electric machine of the present invention has the following effects. According to the means of claim 1, when the insulating base is attached to the insulator, the conductive member of the insulating base is connected to the coil terminal wire for external connection. Therefore, it is not necessary to solder the coil terminal wire for external connection to the conductive member, so that the assembling workability is improved. Moreover, equipment for soldering the coil terminal wire for external connection is not required, so that equipment cost is reduced. Further, since the connecting portion between the conductive member and the coil terminal wire is not exposed to the outside, the tracking property is improved. Also, make sure that the insulation base is held on the inner and outer circumferences.
It was Therefore, the rattling of the insulating base against the insulator is effective.
It is effectively prevented. In addition, the rigidity of both engaging parts of the insulator
Or, the rigidity of both engaged parts of the insulating base is made different,
One wall is on the side of the engaging part or the engaged part with low rigidity
Located on the other wall, and the other wall has a high rigidity.
The terminal was attached to the insulator so as to be located on the engagement portion side.
Therefore, when mounting the insulation base on the insulator,
Along with the edge base, the other end of the conductive member goes from the base end of the pressing part
Since it will move toward the end, the other end of the conductive member
Section exerts an excessive pressing force on the pressing section, deforming the pressing section.
Is prevented.

According to the second aspect, when the insulating base is mounted on the insulator, the conductive member of the insulating base is connected to the coil terminal wire for common connection. Therefore, it is not necessary to solder the coil terminal wire for common connection to the conductive member, so that the assembling workability is further improved. Moreover, equipment for soldering the coil terminal wire for common connection is not required, so that equipment cost is reduced. According to the third aspect of the invention, the heat sensitive element is arranged close to the conductive member for common connection. For this reason, it is not necessary to provide a heat sensitive element corresponding to the coil terminal wire of each phase, so that the heat sensitive element can be commonly used.

According to the fourth aspect of the invention, the jacket of the coil terminal wire is pierced by the terminal and the terminal is connected to the core wire of the coil terminal wire. For this reason, it is not necessary to remove the outer sheath of the coil terminal wire in advance, so that the assembling workability is further improved. Moreover, the escape groove for the coil terminal wire is formed in the conductive member. For this reason, the contact area between the conductive member and the terminal is increased, so contact failure between the both is prevented. further,
The width of the clearance groove is set larger than the outer diameter of the thickest coil terminal wire that can be used. For this reason, even if the wire diameter of the coil wire becomes large, it is not necessary to replace the conductive member, so that the insulating base can be commonly used.

According to the means described in claim 5, each coil terminal wire is surrounded by the wall portion. Therefore, erroneous contact of the coil terminal wire is prevented. According to the means described in claim 6, the plurality of coil terminal wires are surrounded by the wall portion, and the heat sensitive element is arranged in the wall portion. For this reason, it is difficult for heat generated from the plurality of coil terminal wires to escape to the outside of the wall portion, so that the sensitivity of the thermosensitive element is improved.

[0077] According to the measures of claim 7, wherein, contacting the wall portion from the circumferential direction to the leg for mounting the absolute Enmotodai insulator. Therefore, the insulation base is prevented from rattling laterally with respect to the insulator.

[0078]

[Brief description of drawings]

FIG. 1 is a top view of a stator showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a stator core and an insulating cover.

FIG. 3 is a cross-sectional view showing a connection state of coil terminal wires, terminals, and conductive plates.

FIG. 4 is an exploded perspective view showing a housing portion of an insulating cover, a coil terminal wire, a terminal, and a conductive plate.

FIG. 5 is a cross-sectional view showing a connection state of coil terminal wires, terminals, and conductive plates.

FIG. 6 is a top view of an insulating cover.

FIG. 7 is a cross-sectional view showing how the insulating base is attached to the insulating cover.

FIG. 8 is a bottom view showing an insulating base (a bottom view showing a state in which a heat sensitive element, a hall element, and a capacitor are mounted)

FIG. 9 is a perspective view showing an insulating base (a perspective view showing a state in which a heat-sensitive element, a hall element, and a capacitor are not mounted)

FIG. 10 is a perspective view showing a conductive plate.

FIG. 11 is an electric circuit diagram showing a connection state of a hall element and a capacitor.

FIG. 12 is a view showing a second embodiment of the present invention (a sectional view showing a state where an insulating base is attached to an insulating cover).

FIG. 13 is a partial top view showing an insulating cover.

FIG. 14 is a top view showing a terminal board.

FIG. 15 is a sectional view taken along the line EE in FIG.

FIG. 16 is a sectional view showing the overall configuration.

FIG. 17 is a view corresponding to FIG. 12 showing a state in which the insulating base is attached to the insulating cover.

FIG. 18 is a view corresponding to FIG. 12 showing a state in which the insulating base is attached to the insulating cover.

FIG. 19 is a view corresponding to FIG. 12 showing a state in which the insulating base is attached to the insulating cover.

FIG. 20 is a view corresponding to FIG. 12 showing a state in which the insulating base is attached to the insulating cover.

FIG. 21 is a view corresponding to FIG. 12 showing a state where the insulating base is mounted on the insulating cover (a diagram for explaining that the pressing portion of the terminal is crushed by the connecting portion of the conductive plate).

FIG. 22 is a view corresponding to FIG. 12 showing a state where the insulating base is attached to the insulating cover (a diagram illustrating that the pressing portion of the terminal is crushed by the connecting portion of the conductive plate).

FIG. 23 is a view corresponding to FIG. 12 showing a state in which the insulating base is mounted on the insulating cover (a diagram for explaining that the pressing portion of the terminal is crushed by the connecting portion of the conductive plate).

FIG. 24 is a view showing a conventional example (top view of a stator).

FIG. 25 is a perspective view showing an insulator.

FIG. 26 is a sectional view showing a connection state of coil terminal wires, pins, and conductive plates.

[Explanation of symbols]

11 is a stator core, 13 is an insulating cover (insulator), 1
Reference numeral 4 is a coil, 15a is a conductive wire (core wire), 15b is a coating (sheath), 16 is a mounting portion (engaging portion), 16a and 16a.
b is a leg portion, 17 is an insulating base, 18 is a mounted portion (engaged portion, wall portion), 20 is a terminal, 20a and 20b are connection portions (wall portion), 20c is a pressing portion, and 21 is a housing portion. (Wall), 2
2 is a conductive plate (conductive member for external connection), 22b is a relief groove,
Reference numeral 23 is a conductive plate (conductive member for common connection), 23b is an escape groove, 27 is a heat sensitive element, 28 is a wall portion, 29 is a connector portion,
Reference numerals 41 and 42 denote engaging portions, and 43 and 44 denote engaged portions.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-56-86046 (JP, A) JP-A-54-137601 (JP, A) JP-A-6-205558 (JP, A) JP-A-5- 316676 (JP, A) JP-A-5-38119 (JP, A) JP-A-4-299045 (JP, A) JP-A-3-159535 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 3/50 H02K 11/00

Claims (7)

(57) [Claims] And 1. A resin which is attached to the stator core of the insulator, and a coil wound around from the top of the insulator to the stator core, and the made of resin mounted on the insulator the insulating base, the insulating provided on the base, and the connector to which the connector of the external circuit is fitted, provided in the insulating base, a conductive member for external connection end portion is positioned within said connector portion, it is attached to the insulator , A coil connected to the coil end wire
A V-shaped terminal, an engaging portion formed on the inner and outer peripheral portions of the insulator, and an inner and outer peripheral portion of the insulating base.
The other end of the conductive member
An engaged portion connected to the terminal, and the other end portion of the conductive member is provided on one wall portion of the terminal.
A pressing portion that presses toward one wall is formed, and the both engaging portions or both engaged portions have different rigidity.
In the terminal, one wall has an engaging portion with low rigidity or
Located on the engaged part side and the other wall part has high rigidity
Attached to the insulator so that it is located on the side of the
A stator of a rotating electric machine characterized by being worn . 2. The insulating base is provided with a conductive member for common connection, which is connected to a coil terminal wire for common connection when the insulating base is mounted on an insulator. The stator of a rotating electric machine according to claim 1. 3. The stator of a rotary electric machine according to claim 2, wherein a heat sensitive element is provided on the insulating base, and the heat sensitive element is arranged in the vicinity of the conductive member for common connection. 4. A terminal to be connected to the core wire breaks through the envelope of the coil terminal wire Along with being attached to the insulator
The stator of a rotating electric machine according to claim 1 or 2, wherein an escape groove wider than the outer diameter of the thickest coil terminal wire that can be used is formed at the other end of the conductive member. . 5. The insulating base is formed with a wall portion surrounding each coil terminal wire.
The stator of the rotating electric machine described. 6. The insulating base is formed with a wall portion surrounding a plurality of coil terminal wires, and the insulating base is provided with a heat sensitive element located inside the wall portion. Item 3. A stator of a rotating electric machine according to Item 1 or 2. 7. One of an insulator and an insulating base
Has legs for attaching the insulation base to the insulator.
Is, on the other, the stator of the rotating electric machine according to claim 1, wherein a wall portion which contacts the circumferential direction to the leg portion.