JP2008148371A - Stator of motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator of a motor in which assemblability of a stator end is improved. <P>SOLUTION: The staotor 50 of a motor has a stator core 30 having a plurality of concave slots 32 formed in its internal circumference; a U-shape laminated conductor 60 formed by laminating a plurality of thin-plate ends 61a; and an end connection conductor 20 formed by laminating a plurality of connection thin plates 21 for connecting the end of the U-shape laminate conductor 60 to the end of another U-shape laminated conductor 60. In the stator 50, a plate-like insulator 15 is sandwiched between the two pairs of U-shape laminate conductors 60 inserted into a slot 32 of the stator core 30, a first U-shape thin plate 61 constituting the U-shape laminate conductor 60 and a plurality of gap holding protrusions 15a protruding corresponding to an end gap 13 formed on the end of the second U-shape thin plate 61 are formed on both the surfaces of the plate-like insulator 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure of a stator used in a motor, and more particularly, to a stator with improved assemblability of a motor that is used as a conductor by laminating thin plates without using windings.

The main type of stator used in motors is a wound-type stator in which an enamel-coated copper wire is wound around a stator core. In recent years, a stator using a thin laminated conductor as shown in Patent Document 1 has been proposed for the purpose of downsizing and high output of the stator.
There are two advantages of a stator using a thin laminated conductor over a wound stator. As a first advantage, the thickness of the coil end portion can be reduced by adopting a method in which the thin plate laminated conductors inserted into the slots are joined to each other using the end connecting conductors obtained by laminating the thin plates. It can be suppressed and can contribute to miniaturization of the stator.
As a second advantage, the winding type stator is configured to wind the enamel-coated copper wire around the teeth portion of the stator, but it is necessary to secure a minimum bending radius in order to prevent cracking of the enamel coating. As a result, there is a limit to the thickness of the winding that can be used. Compared with a wound stator, a stator using thin laminated conductors is connected at the end, so the cross-sectional area can be increased, and the slot ratio of the conductor is increased. This makes it possible to increase the current density.

FIG. 14 shows an exploded perspective view of a stator of a motor shown in Patent Document 1 which is an example of a stator using a thin laminated conductor.
The motor of Patent Document 1 is configured by combining a stator core 110 with a laminated coil piece 120, an annular connecting coil piece 130, the other end side connecting coil piece 140, and a connecting ring 150. The laminated coil piece 120 is formed by integrally molding two laminated thin sheet conductors with insulating resin. The annular connecting coil piece 130 and the other end side connecting coil piece 140 are formed by integrally molding laminated thin plate conductors with an insulating resin. The connection ring 150 is formed by integrally molding an U-, V-, and W-phase connection line and a neutral line that are arranged in an annular shape with an insulating resin.

An end portion of the laminated coil piece 120 inserted into the slot 114 provided in the stator core 110 and machined, and an end portion of the laminated coil piece 120 inserted into the other slot 114 are annular. The ends of the machined thin plates constituting the connection coil piece 130 and the other end side connection coil piece 140 are abutted, welded, and electrically connected.
The laminated thin plate conductors are combined by resin molding and electrically connected to form a thin laminated stator, so that the end of the stator has an annular connecting coil piece 130, etc. Only the thickness of the end side connection coil piece 140 and the connection ring 150 is required, which is advantageous for making the stator compact. Further, since the stator core 110 inserted into the slot 114 is formed by stacking thin plates, the space factor of the slot 114 can be increased and the current density can be increased. This is also advantageous for higher output.

However, in the motor stator disclosed in Patent Document 1, there are 400 or more joint portions between the thin plates on both sides. Therefore, even if any welding method such as TIG welding or laser welding is used to weld the joining portions of the thin plates, the TIG welding torch or laser welding spot is accurately positioned with respect to all the contacts. Because it is necessary, welding takes time.
In addition, the enamel covering the thin plate may be burned out due to the influence of heat generated during welding. Furthermore, since the thin plate end is machined, the processing cost is high, and it is necessary to position the laminated coil piece 120, the annular connecting coil piece 130 and the other end side connecting coil piece 140 with high accuracy for welding. There is.

As means for solving the problem of Patent Document 1, a stator manufacturing method proposed by the applicant in Patent Document 2 and a technique related to a stator of a rotating electrical machine manufactured by a stator manufacturing method are disclosed. In Patent Document 2, a conductive adhesive is used for joining thin plates. According to this method, after forming a thin plate with a press, a conductive adhesive is applied to the end of at least one thin plate, the thin plate is assembled to the end of the stator, and the joint is pressed after assembly. Therefore, it is possible to reduce the time required for joining.
JP 2001-178053 A JP 2005-137174 A

However, Patent Document 2 has a problem regarding the assemblability of the stator end.
When the stator using the thin plate laminated conductor of Patent Document 1 is used for, for example, a drive motor of a hybrid vehicle, it is required to be smaller and have higher output as compared with a conventional motor. The thickness per sheet becomes very thin. Further, it is necessary to further reduce the thickness of the end portion of the thin plate in order to form a portion to be joined using a conductive adhesive in combination with the end joint conductor.
The material used for the conductor of the stator is high conductivity such as copper and aluminum, and there are many relatively inexpensive materials, but copper and aluminum have low rigidity. Therefore, the joining portion with the end joining conductor formed at the end of the thin plate is easily deformed because the thickness of the plate is thin and the rigidity is low.

The thin plates used for the stator are press-molded one by one in the forming process, stacked into a plurality of sheets, and inserted into the slots of the stator. When a thin plate is press-molded, internal stress is accumulated, so that the thin plate may be deformed when the internal stress is released. In particular, it is considered that this influence is likely to occur at the base of the joint portion provided at the end of the thin plate, and there is a risk of causing deformation such that the joint portion falls in the thickness direction of the thin plate.
In a state where the end portions of the thin plates are deformed, when the thin plates are stacked, a portion where the end gap formed at the end portions of the adjacent thin plates becomes narrow is formed.
When the end joint conductor is inserted into the end gap in such a state, the opening is narrowed, so that the end joint conductor cannot be inserted into the predetermined end gap or the end joint conductor or When the thin plate comes into contact, the joint portion may buckle, which may cause a failure.

  SUMMARY OF THE INVENTION In order to solve such problems, an object of the present invention is to provide a stator for a motor that secures the opening of the end gap and improves the assemblability of the end of the stator.

In order to achieve the above object, the stator of the motor according to the present invention has the following characteristics.
(1) A stator core in which a plurality of concave slots are formed on the inner periphery, a laminated conductor in which a plurality of thin plates are laminated, and a plurality of conductors that connect ends of the laminated conductor and other laminated conductors In a stator of a motor having an end connection conductor formed by laminating connection thin plates, a plate insulator is sandwiched between two sets of the laminated conductors inserted into the slots of the stator core. A plurality of protrusions are formed on both surfaces of the plate-like insulator so as to protrude into end gaps formed between the adjacent thin plates.

(2) In the stator of the motor described in (1), the projection of the plate insulator is formed so that an interval between the adjacent thin plates is increased toward an end portion. .

With the motor stator according to the present invention having such characteristics, the following operations and effects can be obtained.
First, in the invention described in (1), a plate-like insulator is sandwiched between two sets of laminated conductors inserted into the slots of the stator core, and a plurality of protrusions are formed on both sides of the plate-like insulator. Since the protrusion is formed in the end gap formed between the adjacent thin plates, the end formed between the first thin plate and the second thin plate by the protrusion formed on the plate insulator The opening of the gap can be secured.
As described above, the thin plate constituting the laminated conductor is easily deformed because the joint portion at the end is thin and the rigidity of the material is low. If the joint portion of the thin plate is deformed and falls in the thickness direction, a portion where the end gap becomes narrow is formed, which may cause an obstacle when the thin plate for connection is inserted.
Therefore, protrusions corresponding to the end gaps are provided on both surfaces of the plate insulator, and when the laminated conductor is inserted into the stator core, the thin plate joining portion enters between the projections, so that the thin plate joining portion is The deformation is corrected, and it is possible to secure an opening in the end gap for inserting the connection thin plate. Therefore, it can be expected to improve the assembly of the motor stator.

In the invention described in (2), in the motor stator described in (1), the protrusions of the plate insulators are formed so that the distance between adjacent thin plates increases toward the end. Therefore, the opening of the end gap between adjacent thin plates can be widened and held.
When miniaturization of the stator is promoted, a thin plate constituting the laminated conductor may be 1 mm or less. If the joint with the connecting thin plate that forms the end connection conductor is formed at the end of the thin plate, it will become even thinner, so even if parts are manufactured with high accuracy and the end of the thin plate is not deformed, the end When inserting the connecting thin plate into the gap, the positioning accuracy of the parts is required.
However, the opening of the end gap formed at the end of the adjacent thin plate can be widened by the protrusions formed so that the distance between the adjacent thin plates increases toward both ends of the plate insulator. The insertion of the connecting thin plate into the end gap is facilitated. Therefore, the effect described in (1) can be obtained, and the opening of the end gap can be widened and held, and the insertion of the connecting thin plate is facilitated, so that the assembly of the motor stator can be improved.

(First embodiment)
Next, a first embodiment will be described with reference to the drawings. First, the outline of the stator assembly process will be described with reference to FIGS.
FIG. 1 shows a perspective view of the stator 50 in the insertion step of the first embodiment. FIG. 2 is a perspective view of the stator 50 in the joining process. FIG. 3 is a perspective view of the stator 50 in the coil connection process. FIG. 4 is a perspective view of the stator 50 in the resin molding process.
In the stator 50, first, as shown in FIG. 1 in <insertion step>, the U-shaped laminated conductor 60 is inserted into a predetermined position of the stator core 30. Then, as shown in FIG. 2 in the <joining step>, the ends of the U-shaped multilayer conductor 60 are joined by the end connecting conductor 20 to form a coil. Further, as shown in FIG. 3 in <Coil connection step>, the formed coils are connected by the connection lines 40 (connection lines 40W01 to 40U05). Finally, as shown in FIG. 4 in <resin molding step>, resin mold portions 45 are formed on both surfaces of the end portion of the stator core 30.

Hereinafter, description of each part which comprises the stator 50, and the procedure of an assembly are demonstrated.
<Insertion process>
The <insertion step> is a step of inserting the U-shaped laminated conductor 60 into the slot 32 formed in the stator core 30.
FIG. 5 is a diagram illustrating a U-shaped laminated conductor 60 that is inserted into a slot 32 formed in the stator core 30.
The U-shaped multilayer conductor 60 is formed by laminating nine sheets of U-type thin plates 61 each having an insulating film attached thereto. Note that the number of the U-shaped thin plates 61 to be laminated varies depending on the coil design.
The U-shaped thin plate 61 is referred to as a first U-shaped thin plate 6101 to a ninth U-shaped thin plate 6109 in the order in which the U-shaped thin plate 61 is arranged inside when inserted into the stator core 30. However, for convenience, the simple U-shaped thin plate 61 refers to any or all of the first U-shaped thin plate 6101 to the ninth U-shaped thin plate 6109.

The U-shaped thin plate 61 is a rectangular copper plate having a thickness of several mm and is formed by press molding. Bonding surfaces 61 b are formed at the thin plate end portions 61 a formed at both ends of the U-shaped thin plate 61.
The thin plate end portion 61a is formed at the end portion of the U-shaped thin plate 61 and is thinner than other portions. Moreover, the insulating film is affixed on the back side where the joint surface 61b is formed. The insulating film is a resinous thin film that can ensure insulation, such as polyamide or amideimide. A thermosetting adhesive is applied to one side of the insulating film, and the thermosetting adhesive application surface is bonded to the U-shaped thin plate 61 and pressed with a heated roller. The thermosetting adhesive between the pressure-heated insulating film and the U-shaped thin plate 61 is cured, and the insulating film adheres to one side of the U-shaped thin plate 61 to form an insulating layer.
The joining surface 61b secures a wide contact area with a connecting thin plate joining surface 21b, which will be described later, and has an area about several times the cross-sectional area of the U-shaped thin plate 61 so as not to become an electrical resistance for conducting the U-shaped thin plate 61. Is secured. In addition, in order to distinguish, it will call the 1st joining surface 61b1 and the 2nd joining surface 61b2. However, when describing as the joining surface 61b, it shall point out either the 1st joining surface 61b1 or the 2nd joining surface 61b2, or both.

Further, the U-shaped laminated conductor 60 has a U-shaped thin plate 61 laminated in a trapezoidal shape, and the width of the U-shaped thin plate 61 constituting the U-shaped laminated conductor 60 is slightly different. Of the stacked U-shaped thin plates 61, the narrowest width is the first U-shaped thin plate 6101 located on the inner diameter side when inserted into the stator core 30, and the largest width is This is a ninth U-shaped thin plate 6109 located on the outer diameter side.
The first U-type thin plate 6101 to the ninth U-type thin plate 6109 are also slightly different in thickness. The largest thickness is the first U-type thin plate 6101 located on the inner diameter side when inserted into the stator core 30, and the smallest thickness is the ninth U-type located on the outer diameter side. It is a thin plate 6109. When inserted into the stator core 30, all U-shaped thin plates 61 can have the same cross-sectional area by increasing the width and decreasing the thickness of the outer peripheral portion. As a result, the space factor in the slot 32 can be increased, and the power output can be increased.

FIG. 6 shows a perspective view of the stator core 30.
The stator core 30 is manufactured by laminating annular thin plates, and a plurality of teeth portions 31 and slots 32 (first slot 3201 to eighteenth slot 3218) are formed. The slot 32 has an opening formed on the inner peripheral side of the stator core 30, and a projection formed on the case-like insulator 16 enters the opening so that the slot 32 can be positioned. In addition, although the front-end | tip of the teeth part 31 comprises the wall of the stator core 30 inner peripheral side of the slot 32 formed in right and left, depending on the design concept of the stator 50, there is no such an overhanging part. Also good.
In the first embodiment, 18 teeth portions 31 and the same number of slots 32 are formed in the stator core 30.
The slots 32 formed at 18 positions of the stator core 30 are referred to as a first slot 3201 to an 18th slot 3218 for convenience. However, the term “slot 32”, unless otherwise specified, indicates any one or all of the first slot 3201 to the eighteenth slot 3218.
A case-like insulator 16 and a plate-like insulator 15 as shown in FIG. 7 are inserted into the slots 32 of the stator core 30. Then, one side of the U-shaped multilayer conductor 60 is inserted into the hole formed by the case-like insulator 16 and the plate-like insulator 15. A state in which all the U-shaped laminated conductors 60 are assembled to the stator core 30 is shown in FIG.

FIG. 7 shows the case-like insulator 16 and the plate-like insulator 15 that are inserted into the stator core 30.
A case-like insulator 16 is inserted into a slot 32 formed in the stator core 30. The case-like insulator 16 is provided with a flange 16a. The thickness of the flange 16a allows the height to be determined when the U-shaped laminated conductor 60 is inserted into the stator core 30. The case insulator 16 is made of a material having insulation and heat resistance. Since the heat-resistant temperature is determined by the temperature at the time of motor operation or the like, an optimal material for the case-like insulator 16 may be selected according to the temperature as appropriate.
The plate insulator 15 is formed of a heat-resistant insulating resin like the case insulator 16. As shown in FIG. 7, a spacing holding projection 15 a is provided at the tip portion of the plate insulator 15. The spacing holding projections 15a are formed corresponding to the spacing of the end gap 13 formed when the U-shaped thin plate 61 is inserted.

The plate-like insulator 15 has a structure that is fitted inside the case-like insulator 16, and is fitted into the case-like insulator 16 together with the U-type laminated conductor 60, so that the U-shaped laminated conductor 60 and the case-like insulator 16 are inserted into the case-like insulator 16. The plate insulator 15 can be held.
Since the U-shaped laminated conductor 60 inserted into the case-like insulator 16 is surrounded by the plate-like insulator 15 and the case-like insulator 16, insulation between the U-shaped laminated conductors 60 is ensured and a stator core described later is provided. It is possible to ensure insulation from 30.

After the case-like insulator 16 and the plate-like insulator 15 are set in the slot 32 of the stator core 30, as shown in FIG. 1, the U-shaped laminated conductor 60 is inserted into a predetermined position.
The U-shaped multilayer conductor 60 is inserted into the two slots 32 so as to straddle the tooth portion 31. For example, the slot insertion portion 61 c of the U-shaped thin plate 61 constituting the U-shaped multilayer conductor 60 is inserted into the first slot 3201 and the second slot 3202, and the U-shaped multilayer conductor 60 inserted adjacent thereto is the second slot 3202. The slot insertion portion 61c is inserted into the third slot 3203.
In this way, the U-shaped multilayer conductor 60 is inserted into the case-shaped insulator 16 inserted into the slot 32, and the slot-insertion of the U-shaped thin plate 61 constituting the U-shaped multilayer conductor 60 is inserted into the case-shaped insulator 16. The part 61c is stored in a hidden form.

FIG. 8 is a three-dimensional perspective view of the tip portion of the U-shaped multilayer conductor 60 when the U-shaped multilayer conductor 60 is inserted into the plate insulator 15.
The thin plate end 61a formed on the U-shaped thin plate 61 of the U-shaped laminated conductor 60 at the stage where the U-shaped laminated conductor 60 is assembled to the case-like insulator 16 and the plate-like insulator 15 inserted into the stator core 30. Is inserted between the spacing holding projections 15 a formed on the plate-like insulator 15.
As described above, the plate-like insulator 15 is provided with the spacing holding protrusions 15a on both surfaces, and when the U-shaped laminated conductor 60 is inserted in the state where the plate-like insulator 15 is assembled to the case-like insulator 16, The tip end portion enters a groove formed by the adjacent spacing holding projections 15a.
Accordingly, the position of the thin plate end portion 61a of the U-shaped thin plate 61 is determined and held by the interval holding protrusion 15a of the plate insulator 15.
Since the thickness of the U-shaped thin plate 61 is several mm, and in some cases, the thickness is 1 mm or less, the thickness of the thin plate end portion 61a is reduced, and the material of the U-shaped thin plate 61 is copper. However, by providing the interval holding projection 15a, the position of the thin plate end portion 61a can be held at a predetermined position.

Although the shape of the spacing holding projection 15a formed on the plate insulator 15 is omitted in FIG. 8, the spacing holding projection 15a actually corresponds to the position of the end gap 13 shown in FIG. The location is different. When inserted into the stator core 30 from the inner peripheral side of the stator core 30 as the first interval holding projection 15a01 to the ninth interval holding projection 15a09, the first interval holding projection 15a01 and the second interval holding projection 15a02 The interval is wide and gradually decreases toward the ninth interval holding projection 15a09.
This interval corresponds to the thickness of the thin plate end 61a. That is, the first spacing holding projection 15a01 corresponds to the width of the end gap 13 formed between the thin plate end 61a of the first U-type thin plate 6101 and the thin plate end 61a of the second U-type thin plate 6102, and the second U The second spacing holding projection 15a02 corresponds to the width of the end gap 13 formed between the thin plate end 61a of the mold thin plate 6102 and the thin plate end 61a of the second U-shaped thin plate 6102, and so on. The holding protrusion 15a09 is formed.

As shown in FIG. 10 to be described later, the shape of the first interval holding projection 15a01 to the ninth interval holding projection 15a09 is tapered on the side where the U-shaped thin plate 61 is inserted. It is expected that the deformation of the thin plate end portion 61a is corrected along the groove formed between 15a. The end gap 13 is held at a predetermined interval by the interval holding projection 15a.
In addition, about the shape of the space | interval holding | maintenance protrusion 15a, since it should just become a guide of the thin plate edge part 61a, it may be another shape. For example, it is necessary to heat and press the bonding surface 61b and the connecting thin plate bonding surface 21b and bond them with the adhesive layer 22 after this, but the inner side of the spacing holding protrusion 15a is not disturbed by this heating and pressing. It does not prevent the meat from being thinned out or shorter than the length of the thin plate end portion 61a.
Further, when the thin plate end portion 61 a is inserted into the stator core 30, the thickness of the thin plate end portion 61 a increases toward the inner peripheral side. Therefore, since it becomes difficult to deform | transform compared with the outer peripheral side, if there is no possibility of deform | transforming, it is not necessary to provide the space | interval holding | maintenance protrusion 15a in the inner peripheral side of the stator core 30. FIG.

<Joint process>
<Jointing step> is a step of assembling the end connection conductor 20 in a state as shown in FIG. 2 in a state where the U-shaped laminated conductor 60 is set on the stator core 30 as shown in FIG.
FIG. 9 is a schematic perspective view when the end connection conductor 20 is inserted into the U-shaped multilayer conductor 60 inserted into the stator 50. FIG. 10 is a cross-sectional view of FIG.
First, the end connection conductor 20 will be described.
The end connection conductor 20 shown in FIG. 2 is a laminate of nine connection thin plates 21. As shown in FIG. 2, the connection thin plate 21 includes a first connection thin plate 2101 to a ninth connection thin plate 2109 from the inside when connected to the stator core 30. For the sake of convenience, the simple description of the connection thin plate 21 refers to any or all of the first connection thin plate 2101 to the ninth connection thin plate 2109.

The connecting thin plate 21 is a rectangular copper plate having a thickness of several millimeters. Thinner joints 21a are formed at both ends. Further, a connecting thin plate joining surface 21b is formed in the joining portion 21a. The joining portion 21a is designed to be substantially the same as the thickness of the connecting thin plate 21 when the thin plate end portion 61a and the joining portion 21a are brought into contact with each other and the thicknesses of both are combined. This is because when the current is passed through the stator 50, consideration is given to preventing resistance from occurring at the connection portion between the U-shaped thin plate 61 and the connecting thin plate 21.
Further, as will be described later, when the joining surface 61b and the connecting thin plate joining surface 21b are joined, pressure is applied in the thickness direction of the joining portion of the U-shaped thin plate 61 and the connecting thin plate 21, so that it does not deform greatly. There is also an effect. The first connecting thin plate 2101 to the ninth connecting thin plate 2109 are all designed with the same dimensions.
An adhesive layer 22 is provided on the surface of the connecting thin plate bonding surface 21b. The adhesive layer 22 is not provided on the whole surface of the connecting thin plate bonding surface 21b, but is uniformly applied leaving the outer periphery. This is intended to prevent the adhesive layer 22 from protruding and short-circuiting with other parts when the joining surface 61b and the connecting thin plate joining surface 21b are joined.

A silver paste is used for the adhesive layer 22 of the first embodiment, which is applied by several tens of μm using screen printing, and after application, the organic solvent is volatilized by drying. What remains after drying is an adhesive layer 22 containing silver particles, which has electrical conductivity. The adhesive layer 22 is not particularly limited to silver paste, but preferably has higher conductivity than the material used for the U-shaped thin plate 61 and the connecting thin plate 21. This is because the joint portion is likely to become a resistance when the coil is formed, and it is better to lower the resistance value as much as possible. Since copper is used for the U-shaped thin plate 61 and the connecting thin plate 21, a silver paste having higher conductivity than copper is used in the first embodiment.
The length of the connecting thin plate 21 is set such that the inner U-shaped thin plate 61 inserted in the slot 32 of the stator core 30 can be joined. Since all the connecting thin plates 21 are designed with the same dimensions, when connecting the outer U-shaped thin plates 61 inserted into the slots 32 of the stator core 30, the connecting thin plates 21 are slightly shorter, The surface 61b and the connecting thin plate joining surface 21b do not completely overlap. However, if the areas of the joining surface 61b and the connecting thin plate joining surface 21b are set wide in anticipation of this, the resistance becomes higher than other portions. It is possible to prevent this.

In order to join such an end connection conductor 20 to the U-shaped laminated conductor 60 inserted into the stator core 30, it is necessary to insert the connection thin plate 21 into the end gap 13.
The end gap 13 is constituted by a joining surface 61b portion of adjacent U-shaped thin plates 61, and is, for example, a clearance between the insulating surface of the first U-shaped thin plate 6101 and the joining surface 61b of the second U-shaped thin plate 6102. Further, since the end gap 13 is substantially the same as the thickness of the joint 21 a formed on the connecting thin plate 21, the end of the U-shaped thin plate 61 is deformed when the connecting thin plate 21 is inserted into the end gap 13. If it does, there exists a possibility of leading to peeling of an insulating film or peeling of the adhesive layer 22. In particular, as the thickness of the U-shaped thin plate 61 becomes thinner, the U-shaped thin plate 61 is more easily deformed by an external force or the like.
However, since the interval holding projection 15a provided on the plate insulator 15 is inserted into the end gap 13, the U-shaped thin plate 61 is not easily deformed.

As shown in FIG. 10, the nine connecting thin plates 21 are inserted into the insertion arm 75 and inserted into the end gap 13 held in this manner.
The insertion arm 75 includes an arm 76, a clamper 77, and a holding jig 78. The arm 76 and the clamper 77 have a structure capable of holding a holding jig 78, and the holding jig 78 can be held and released by sliding the clamper 77. The holding jig 78 is formed of, for example, resin, and includes a partition portion 78a so that the connection thin plate 21 can be held at a predetermined interval.
In addition, you may provide the jig | tool holding similarly to the partition part 78a about the junction part 21a of the thin plate 21 for a connection hold | maintained. The joint 21a is thin, and if a guide is provided and held, there is an effect that deformation can be suppressed.
A predetermined number of connecting thin plates 21 are set in the holding jig 78 in advance, and after being gripped by the insertion arm 75, they move toward the end gap 13 formed in the thin plate end portion 61a of the U-shaped laminated conductor 60. Let
Thus, for example, the first joint surface 61b1 of the first U-type thin plate 6101 inserted into the first slot 3201 and the second joint surface 61b2 of the second U-type thin plate 6102 inserted into the second slot 3202 are provided. The connection is made at the joint 21 a of the second connection thin plate 2102.
Similarly, the first connecting surface 61b1 of the second U-type thin plate 6102 inserted into the first slot 3201 and the second connecting surface 61b2 of the third U-type thin plate 6103 inserted into the second slot 3202 are used for the third connection. The fourth joining surface 61b1 of the third U-type thin plate 6103 inserted in the second slot 3202 and the first joining surface 61b1 of the third U-type thin plate 6103 inserted into the first slot 3201 are connected by the thin plate 2103. The left and right U-shaped thin plates 61 connected by the connecting thin plate 21 are connected in a shifted state to form a coil.

The U-shaped thin plate 61 constituting the U-shaped laminated conductor 60 inserted into the other slot 32 is also connected in the same manner by the connecting thin plate 21, and the end connection conductor 20 is set on the entire circumference.
Since the end gap 13 formed between the thin plate end portions 61a of the adjacent U-shaped thin plates 61 is held by the interval holding projection 15a formed on the plate insulator 15, the connecting thin plate 21 is inserted. It becomes easy to do.
When the end connection conductor 20 is assembled to the end of the U-shaped multilayer conductor 60, the state shown in FIG. In this state, the U-shaped laminated conductor 60 and the end connecting conductor 20 are bonded with high conductivity by the conductive adhesive by pressing and heating the bonded portion from the inner peripheral side and the outer peripheral side of the stator core 30.
By connecting the end of the U-shaped multilayer conductor 60 accommodated in one slot 32 and the end of the U-shaped multilayer conductor 60 accommodated in the other slot 32 with the end connection conductor 20, On the other hand, a coil is formed in a spiral shape. Since 18 teeth portions 31 are formed on the stator core 30, 18 pairs of coils are formed.
As a result of connecting the U-shaped multilayer conductor 60 and the end connection conductor 20, the first slot joined to the second joint surface 61 b 2 of the first U-type thin plate 6101 provided in the U-type multilayer conductor 60 inserted into the second slot 3202. The other end of 3201 and one first joint surface 61b1 of the ninth U-shaped thin plate 6109 provided in the U-shaped multilayer conductor 60 inserted into the first slot 3201 are left without being joined.

<Coil connection process>
In the <coil connecting step>, the end of the U-shaped laminated conductor 60 is joined by the end connecting conductor 20 to form a coil, and then the connection line 40 is joined to form a circuit.
As shown in FIG. 3, the connection line 40 electrically connects the coil formed of the U-shaped laminated conductor 60 and the end connection conductor 20.
The connection line 40 is a copper plate and is covered with an insulation. By this connection line 40, the 18 pairs of coils formed in the teeth portion 31 of the stator core 30 by the U-shaped laminated conductor 60 and the end connection conductor 20 are electrically connected. That is, the other end of the first slot 3201 joined to the second joining surface 61b2 of the first U-type thin plate 6101 provided in the U-type multilayer conductor 60 inserted into the second slot 3202 described above and the first slot 3201 are inserted. Further, the connecting wire 40 is connected to one first joining surface 61b1 of the ninth U-shaped thin plate 6109 provided in the U-shaped laminated conductor 60, whereby the coils are electrically connected.

The coil composed of the U-shaped multilayer conductor 60 and the end connection conductor 20 around the teeth portion 31 is connected to each coil because the U-shaped multilayer conductor 60 and the end connection conductor 20 are spirally connected. Two ends of the thin plate 21 are left. One of the surplus ends and one end of another coil are electrically connected by a connecting line 40. Thus, the coil connected to the connection line 40 forms any one of the U phase, the V phase, and the W phase.
That is, six coils connected by connection lines 40U01 to 40U05 form a U phase, a U-phase terminal 41U is connected to the end of the coil, and six coils connected by connection lines 40V01 to 40V05 are connected. The V phase is formed, the V phase terminal 41V is connected to the end of the coil, the six coils connected by the connection lines 40W01 to 40W05 form the W phase, and the W phase terminal 41W is formed at the end of the coil. Connected.
Note that the connection lines 40U01 to 40U05, the connection lines 40V01 to 40V05, and the connection lines 40W01 to 40W05 are simply named for convenience. One or all of them.
Further, when the U phase terminal 41U, the V phase terminal 41V, and the W phase terminal 41W are described as the terminal 41, any one or all of them are indicated.

<Resin molding process>
In the <resin molding step>, the resin mold portion 45 is formed on the stator first surface 30a side and the stator second surface 30b side of the stator core 30.
In the state where the coils formed around the teeth portion 31 provided in the stator core 30 are electrically connected by the connecting wire 40, there is a portion that is not insulated, so it is necessary to finally cover with an insulating material. is there. For this reason, the joint part of the U-shaped multilayer conductor 60 and the end connection conductor 20 and the connection part of the connecting line 40 are insulated by resin molding.
The resin constituting the resin mold part 45 is made of a highly insulating material. The resin mold portion 45 peels off due to factors such as an external force applied to the joint between the U-shaped laminated conductor 60 and the end connection conductor 20, the joint between the U-shaped thin plate 61 or the connection thin plate 21 and the connecting wire 40, and the like. It is possible to prevent the other parts from deforming and contacting and short-circuiting.
Thus, the stator 50 of the motor is configured.

Since the first embodiment is configured as described above, it has the following effects.
First, in the <joining step>, the connection thin plate 21 is held by the insertion arm 75 and configured between, for example, the thin plate end portion 61a of the first U-type thin plate 6101 and the thin plate end portion 61a of the second U-type thin plate 6102. When inserted into the end gap 13, the opening of the end gap 13 is ensured by the first interval holding projection 15 a 01 formed on the plate insulator 15. Therefore, when inserting the connecting thin plate 21 into the end gap 13, it is possible to reduce the possibility that the corners of the thin plate end portion 61a come into contact with the joint portion 21a, improve the assemblability, and improve the yield. It is.
That is, when the U-shaped laminated conductor 60 is assembled to the stator core 30, the thin plate end portion 61 a is guided and corrected by the spacing holding projection 15 a, and a predetermined end portion gap 13 can be secured. When the portion 21a is inserted into the end gap 13, the joining portion 21a hits the deformed thin plate end portion 61a and cannot be inserted, or the thin plate end portion 61a or the joining portion 21a is deformed and the thin plate end portion 61a is seated. It is possible to reduce the probability of causing a failure and generating a defect.

  Even when the thin plate end portion 61a is buckled and deformed by the contact between the joint portion 21a and the thin plate end portion 61a, the joint portion 21a may be inserted into the end gap 13. This is because if the force for inserting the joining portion 21a is applied to the end gap 13, the thin thin plate end portion 61a buckles and escapes. However, if the thin plate end portion 61a is buckled at one end, it becomes difficult for the bonding surface 61b and the connecting thin plate bonding surface 21b to come into surface contact during subsequent pressure heating. As a result, the joint surface by the adhesive layer 22 may be reduced, and becomes a resistance when energized. If the resistance is high, the temperature rise when the motor is used is increased, and the temperature becomes high. Therefore, it is conceivable to shorten the life of the motor. Such a problem is also caused by securing the opening of the end gap 13 by the spacing holding projection 15a, thereby avoiding the risk of contact with each other if the positions of the thin plate end 61a and the joining portion 21a are aligned. It is possible to reduce the probability of making it.

Further, the U-shaped laminated conductor 60 inserted into the slot 32 of the stator core 30 is composed of U-shaped thin plates 61 having different thicknesses. Therefore, all of the first U-type thin plate 6101 to the ninth U-type thin plate 6109 have different thicknesses. On the other hand, the thickness of the connecting thin plate 21 is the same. When the U-shaped laminated conductor 60 and the end connecting conductor 20 are combined, it is necessary to insert the connecting thin plate 21 into the end gap 13 in consideration of the difference in thickness. There is.
On the other hand, the U-shaped thin plate 61 and the connecting thin plate 21 can be reduced in cost when formed by pressing or the like than when manufactured by machining, but the dimensional tolerance is larger in press forming than when machining. . That is, the dimensional variation between products increases, and further, since these are used by being stacked, a cumulative error occurs. However, even if there is such a variation in dimensions, if the end gap 13 can be secured by the spacing holding projections 15a, the assemblability will not be deteriorated when the connecting thin plate 21 is inserted.

Further, when the connecting thin plate 21 is inserted into the end gap 13, if the end gap 13 is held at an appropriate width by the spacing holding projection 15 a, the joint 21 a of the connecting thin plate 21 is changed to the end gap 13. When entering, the possibility that the adhesive layer 22 formed on the connecting thin plate joining surface 21b is scraped off at the corner of the thin plate end portion 61a can be avoided.
In addition, the idea of providing a guide on the thin plate end portion 61a side may be developed, and a guide for maintaining a predetermined interval may be provided on the joining portion 21a side. For example, by providing the holding jig 78 with a guide for holding the joining portion 21a at a predetermined interval, the reliability when the connecting thin plate 21 is inserted into the end gap 13 is further increased.

Next, when the connecting thin plate 21 is inserted into the end gap 13, the width of the end gap 13 is secured by the spacing holding projections 15 a formed in the plate insulator 15, so that the adjacent thin plate end portions 61a can be inserted without interfering with the joint 21a of the connecting thin plate 21. Therefore, the possibility of damaging the adhesive layer 22 formed on the joint portion 21a at the corner of the U-shaped thin plate 61 is reduced.
As described above, the adhesive layer 22 uses a conductive adhesive such as a silver paste, but has a low scratch resistance, and if the surface of the adhesive layer 22 is scratched with a sharp object, the adhesive layer 22 peels off relatively easily. . If the adhesive layer 22 is peeled off, the bonding area may be reduced, and the peeled off adhesive layer 22 may cause a short circuit. Further, it is conceivable that the bonding between the thin plate bonding surface 21b for connection and the bonding surface 61b becomes insufficient due to the peeling of the adhesive layer 22, and the bonded portion becomes a resistance. However, if the end gap 13 has a predetermined width secured by the spacing holding projections 15a, the possibility that the adhesive layer 22 is peeled in this way and the possibility that the resistance of the joint portion becomes high can be reduced. It becomes possible.

As described above, in the first embodiment of the present invention, the following configurations, functions, and effects can be obtained.
(1) A stator core 30 having a plurality of concave slots 32 formed on the inner periphery, a U-shaped laminated conductor 60 in which a plurality of U-shaped thin plates 61 are laminated, a U-shaped laminated conductor 60 and another U In a stator of a motor having a plurality of connecting thin plates 21 that connect the end portions of the multilayer laminated conductor 60, the two sets inserted into the slots 32 of the stator core 30. The plate insulator 15 is sandwiched between the U-shaped laminated conductors 60, and a plurality of spacing holding protrusions 15 a are formed between the thin plate end portions 61 a of the adjacent U-shaped thin plates 61 on both surfaces of the plate-like insulator 15. The end portion formed between the thin plate end portions 61 a of the adjacent U-shaped thin plates 61 by the spacing holding projections 15 a formed on the plate-like insulator 15. Opening gap 13 It can be ensured.

The U-shaped thin plate 61 constituting the U-shaped laminated conductor 60 is easily deformed because the thin plate end portion 61a is thin and the rigidity of the material is low as described above. If the thin plate end portion 61a of the U-shaped thin plate 61 is deformed and falls in the thickness direction, a portion where the end gap 13 becomes narrow is formed, which may cause an obstacle when the connecting thin plate 21 is inserted.
Therefore, the spacing holding projections 15a corresponding to the end gaps 13 are provided on both surfaces of the plate insulator 15, and the U-shaped thin plate 61 is interposed between the spacing holding projections 15a when the U-shaped laminated conductor 60 is inserted into the stator core 30. When the thin plate end 61a enters, the deformation of the thin plate end 61a of the U-shaped thin plate 61 is corrected by the spacing holding projection 15a, and the opening of the end gap 13 for inserting the connection thin plate 21 can be secured. It becomes possible. Therefore, it can be expected to improve the assemblability of the stator 50 of the motor.

Next, a second embodiment of the present invention will be described.
(Second embodiment)
The second embodiment has substantially the same configuration as the first embodiment. However, since the structure of the spacing holding projections 15a formed on the plate insulator 15 is different, only the parts different from the first embodiment will be described. The description of the same configuration is omitted.
FIG. 11 is a three-dimensional perspective view of the tip portion of the U-shaped multilayer conductor 60 when the U-shaped multilayer conductor 60 is inserted into the plate insulator 15. It is a figure corresponding to FIG. 8 of 1st Example.
As in the first embodiment, the plate-like insulator 15 is provided with spacing holding projections 15a on both surfaces, and when the U-shaped laminated conductor 60 is inserted in a state where the plate-like insulator 15 is assembled to the case-like insulator 16. The tip portion enters the groove formed by the adjacent spacing holding projections 15a.
Accordingly, the position of the thin plate end portion 61a of the U-shaped thin plate 61 is determined and held by the interval holding protrusion 15a of the plate insulator 15.
Since the thickness of the U-shaped thin plate 61 is several mm, and in some cases, the thickness is 1 mm or less, the thickness of the thin plate end portion 61a is reduced, and the material of the U-shaped thin plate 61 is copper. However, by providing the interval holding projection 15a, the position of the thin plate end portion 61a can be held at a predetermined position.

As shown in FIG. 11, the shape of the spacing holding projections 15 a formed on the plate-like insulator 15 is trapezoidal so that the spacing between the spacing holding projections 15 a increases toward the end of the plate-like insulator 15. Has been.
In addition, although omitted in FIG. 11, the position at which the interval holding projection 15 a is arranged is actually different from the position of the end gap 13 shown in FIG. 13 described later. When inserted into the stator core 30 from the inner peripheral side of the stator core 30 as the first interval holding projection 15a01 to the ninth interval holding projection 15a09, the first interval holding projection 15a01 and the second interval holding projection 15a02 The interval is wide and gradually decreases toward the ninth interval holding projection 15a09.
This interval corresponds to the thickness of the thin plate end 61a. That is, the first spacing holding projection 15a01 corresponds to the width of the end gap 13 formed between the thin plate end 61a of the first U-type thin plate 6101 and the thin plate end 61a of the second U-type thin plate 6102, and the second U The second spacing holding projection 15a02 corresponds to the width of the end gap 13 formed between the thin plate end 61a of the mold thin plate 6102 and the thin plate end 61a of the second U-shaped thin plate 6102, and so on. The holding protrusion 15a09 is formed.

As shown in FIG. 13, which will be described later, the shape of the first interval holding projection 15a01 to the ninth interval holding projection 15a09 is tapered on the side where the U-shaped thin plate 61 is inserted. It is expected that the deformation of the thin plate end portion 61a is corrected along the groove formed between 15a. The end gap 13 is held at a predetermined interval by the interval holding projection 15a.
In addition, about the shape of the space | interval holding | maintenance protrusion 15a, since it should just become a guide of the thin plate edge part 61a, it may be another shape. For example, it is necessary to heat and press the bonding surface 61b and the connecting thin plate bonding surface 21b and bond them with the adhesive layer 22 after this, but the inner side of the spacing holding protrusion 15a is not disturbed by this heating and pressing. It does not prevent the meat from being thinned out or shorter than the length of the thin plate end portion 61a.
Further, when the thin plate end portion 61 a is inserted into the stator core 30, the thickness of the thin plate end portion 61 a increases toward the inner peripheral side. Therefore, since it becomes difficult to deform | transform compared with the outer peripheral side, if there is no possibility of deform | transforming, it is not necessary to provide the space | interval holding | maintenance protrusion 15a in the inner peripheral side of the stator core 30. FIG.

When the U-shaped laminated conductor 60 is inserted into the case-like insulator 16 and the plate-like insulator 15 inserted into the stator core 30, the U-shaped laminated conductor 60 is inserted into the case-like insulator 16 and the thin plate end portion 61a. 11 comes out from the opposite side to the insertion side of the case-like insulator 16, the thin plate end 61 a of the U-shaped thin plate 61 is guided by the spacing holding projection 15 a of the plate-like insulator 15, and as shown in FIG. It is held in an expanded shape.
Thus, since the thin plate end portion 61a is held in a state of being spread outward by the interval holding projection 15a, the end gap 13 is substantially widened when the connecting thin plate 21 is inserted in the <joining step>. It becomes easy to insert the joint portion 21 a into the end gap 13.
FIG. 12 is a schematic perspective view when the end connection conductor 20 is inserted into the U-shaped laminated conductor 60 inserted into the stator 50. FIG. 13 shows a cross-sectional view of FIG.
The connecting thin plate 21 is held by the insertion arm 75 as in the first embodiment, and the connecting portion 21a of the connecting thin plate 21 is inserted from the opening of the end gap 13.

The thin plate end portion 61a is guided by the interval holding projection 15a and the end gap 13 is widened. Therefore, it is necessary to widen the interval of the holding jig 78 for holding the connection thin plate 21. In FIG. 13, the connecting thin plate 21 is held in parallel. However, if the connecting thin plate 21 is held at an angle in accordance with the opening angle of the thin plate end portion 61a, the insertion becomes easier.
By moving the insertion arm 75, the joint 21 a of the connecting thin plate 21 is inserted into the end gap 13.
After inserting the connection thin plate 21, pressure heating is performed so that the thin plate end portion 61a is sandwiched from the inner peripheral side and the outer peripheral side of the stator core 30. By pressurizing and heating, the interval between the thin plate end portions 61a is narrowed, and the joining portion 21a and the thin plate end portion 61a are joined by melting the adhesive layer 22 provided on the connecting thin plate joining surface 21b. . The thin plate end portion 61a is held in the widened position by the interval holding projection 15a, but the interval holding projection 15a formed on the plate-like insulator 15 is made of resin, so it is softened by heating under pressure. It is considered that the joint surface 61b and the connecting thin plate joint surface 21b are in close contact with each other so that they can be easily deformed.
Thereafter, through the <coil connection step> and the <resin mold step>, the stator 50 having the resin mold portions 45 as shown in FIG.

Since the second embodiment is configured as described above, the following effects are exhibited.
First, in the <joining step>, for example, when inserting into the end gap 13 formed between the thin plate end portion 61a of the first U-type thin plate 6101 and the thin plate end portion 61a of the second U-type thin plate 6102, a plate-like insulator is used. The end gap 13 is expanded and held by the interval holding projections 15 a formed on 15. Therefore, the assemblability when inserting the connecting thin plate 21 into the end gap 13 can be improved.
Since the thin plate end portion 61a formed at the end portion of the U-shaped thin plate 61 is thin, there is a possibility that the thin plate end portion 61a may be deformed through a plurality of steps. Therefore, when the U-shaped thin plate 61 is inserted into the plate-like insulator 15 and the case-like insulator 16 inserted into the stator core 30, the thin-plate end portion 61a is deformed by the spacing holding projection 15a of the plate-like insulator 15. Can be corrected and held at a predetermined interval.

  By widening the end gap 13 and holding the thin plate end 61a by the spacing holding projection 15a, the opening of the end gap 13 is made wider than the thickness of the joint 21a when the connecting thin plate 21 is inserted. Can be inserted easily. Further, since the insertion is facilitated, the adhesive layer 22 formed on the connecting thin plate joining surface 21b is less likely to be caught by the corners of the thin plate end portion 61a due to the wide end gap 13. Since the probability of rubbing until the connecting thin plate bonding surface 21b and the bonding surface 61b come to a predetermined position is reduced, it can be expected that the adhesive layer 22 is prevented from peeling off and the resistance increase due to bonding failure is also effective.

As described above, in the first embodiment of the present invention, the following configurations, functions, and effects can be obtained.
(1) A stator core 30 having a plurality of concave slots 32 formed on the inner periphery, a U-shaped laminated conductor 60 in which a plurality of U-shaped thin plates 61 are laminated, a U-shaped laminated conductor 60 and another U In a stator of a motor having a plurality of connecting thin plates 21 that connect the end portions of the multilayer laminated conductor 60, the two sets inserted into the slots 32 of the stator core 30. The plate insulator 15 is sandwiched between the U-shaped laminated conductors 60, and a plurality of spacing holding protrusions 15 a are formed between the thin plate end portions 61 a of the adjacent U-shaped thin plates 61 on both surfaces of the plate-like insulator 15. The end portion formed between the thin plate end portions 61 a of the adjacent U-shaped thin plates 61 by the spacing holding projections 15 a formed on the plate-like insulator 15. Opening gap 13 It can be ensured.
The U-shaped thin plate 61 constituting the U-shaped laminated conductor 60 is easily deformed because the thin plate end portion 61a is thin and the rigidity of the material is low as described above. If the thin plate end portion 61a of the U-shaped thin plate 61 is deformed and falls in the thickness direction, a portion where the end gap 13 becomes narrow is formed, which may cause an obstacle when the connecting thin plate 21 is inserted.
Therefore, the spacing holding projections 15a corresponding to the end gaps 13 are provided on both surfaces of the plate insulator 15, and the U-shaped thin plate 61 is interposed between the spacing holding projections 15a when the U-shaped laminated conductor 60 is inserted into the stator core 30. When the thin plate end 61a enters, the deformation of the thin plate end 61a of the U-shaped thin plate 61 is corrected by the spacing holding projection 15a, and the opening of the end gap 13 for inserting the connection thin plate 21 can be secured. It becomes possible. Therefore, it can be expected to improve the assemblability of the stator 50 of the motor.

(2) In the stator 50 of the motor described in (1), the interval holding projection 15a provided in the plate insulator 15 is formed so that the interval between the adjacent U-shaped thin plates 61 increases toward the end. Therefore, the gap of the end gap 13 formed between the thin plate end portions 61 a of the adjacent U-shaped thin plates 61 can be widened and held, and the connecting thin plate 21 can be easily inserted into the end gap 13. .
When the size of the stator 50 is further reduced, the U-shaped thin plate 61 constituting the U-shaped laminated conductor 60 may be 1 mm or less. If the thin plate end 61a is formed at the end of the U-shaped thin plate 61 in order to connect to the joining portion 21a of the connecting thin plate 21, the thickness is further reduced, so that, for example, a part is manufactured with high accuracy and the thin plate end 61a is deformed. Even if it does not occur, when the connecting thin plate 21 is inserted into the end gap 13, the positioning accuracy of the parts is required.
However, between the adjacent thin plate end portions 61a by the spacing holding projections 15a formed so that the distance between the thin plate end portions 61a of the adjacent U-shaped thin plates 61 increases toward both ends of the plate insulator 15 toward the end portions. The opening of the formed end gap 13 can be widened, and the insertion of the connecting thin plate 21 is facilitated. Therefore, the effect described in (1) can be obtained, and the opening to the end gap 13 can be widened and held, and the joining portion 21a of the connection thin plate 21 can be easily inserted, so that the assemblability can be improved.

In the above, the first embodiment and the second embodiment have been described. However, the present invention is not limited to the first and second embodiments, and may be appropriately changed without departing from the gist thereof. Needless to say, this is applicable.
For example, the number of the slots 32 of the stator core 30 is 18 and the number of the U-shaped thin plates 61 constituting the U-shaped laminated conductor 60 is 9, but this is determined by the design of the motor. It is not limited to this number.
Further, the number of the spacing holding projections 15a provided on the plate-like insulator 15 is also provided at nine places. However, it is only necessary to be able to guide the thin plate end portion 61a, so that it is difficult to change the position, size, and shape of these. Absent.

The perspective view of the stator in the insertion process of 1st Example is shown. The perspective view of the stator in the joining process of 1st Example is shown. The perspective view of the stator in the coil connection process of 1st Example is shown. The perspective view of the stator in the resin mold process of 1st Example is shown. The U-shaped laminated conductor inserted in the slot formed in the stator core of 1st Example is shown. The perspective view of the stator core of 1st Example is shown. The case-like insulator and plate-like insulator inserted into the stator core of the first embodiment are shown. The three-dimensional perspective view of the front-end | tip part of a U-type multilayer conductor when a U-type multilayer conductor is inserted with respect to the plate-shaped insulator of 1st Example is shown. The perspective view at the time of inserting an edge part connection conductor in the U-shaped laminated conductor inserted in the stator of 1st Example is shown. FIG. 10 shows a cross-sectional view of the stator of FIG. 9 in the first embodiment. The three-dimensional perspective view of the front-end | tip part of a U-type multilayer conductor when a U-type multilayer conductor is inserted with respect to the plate-shaped insulator of 2nd Example is shown. The perspective view at the time of inserting an edge part joining conductor in the U-shaped laminated conductor inserted in the stator of 2nd Example is shown. FIG. 13 shows a sectional view of the stator of FIG. 12 in a second embodiment. The disassembled perspective view of the stator using the thin-plate laminated conductor of a prior art is shown.

Explanation of symbols

13 End gap 15 Plate-like insulator 15a Interval holding projection 16 Case-like insulator 16a 鍔 20 End connection conductor 21 Connection thin plate 21a Connection portion 21b Connection thin plate bonding surface 22 Adhesive layer 30 Stator core 30a Stator first surface 30b Stator second surface 31 Teeth portion 32 Slot 40 Connection line 41 Terminal 45 Resin mold portion 50 Stator 60 U-type laminated conductor 61 U-type thin plate 61a Thin plate end portion 61b Joint surface 61c Slot insertion portion 75 Insert arm 76 Arm 77 Clamper 78 Holding jig 78a Partition

Claims (2)

A stator core having a plurality of concave slots formed on the inner periphery, a laminated conductor in which a plurality of thin plates are laminated, and a plurality of connecting thin plates that connect the ends of the laminated conductor and other laminated conductors In the stator of the motor having the end connection conductor formed by laminating,
A plate insulator is sandwiched between two sets of the laminated conductors inserted into the slots of the stator core,
A stator of a motor, wherein a plurality of protrusions are formed on both surfaces of the plate insulator so as to protrude into an end gap formed between the adjacent thin plates. In the stator of the motor according to claim 1,
The stator of the motor, wherein the protrusion of the plate insulator is formed so that an interval between the adjacent thin plates increases toward the end.

Images