JP2020162340A - Coil unit insertion method and device - Google Patents

Abstract

To provide a coil unit insertion method and device, which can securely insert a coil member into a slot.SOLUTION: After a coil member 10 is mounted on a diameter reduction holding jig 23 in a state of a reduced diameter, an insulator 30 is fitted to a wave winding coil unit 3. The diameter reduction holding jig 23 having the wave winding coil unit 3 mounted thereon, and a stator core 2 are housed between an upper side case 21 and a lower side case 22. After a guide member 24 is inserted into the upper side case 21 and the lower side case 22, when an assembly device 20 is rotated by the rotation of a motor 26, the stator core 2 and the diameter reduction holding jig 23 are rotated at the same rotation speed, the diameter of the wave winding coil unit 3 having the reduced diameter is expanded by centrifugal force due to the rotation, and each insulator 30 fitted to the wave winding coil unit 3 is moved to the outside in the radial direction and inserted into each slot 2a. Thus, the wave winding coil unit 3 is attached to the stator core 2.SELECTED DRAWING: Figure 7

Description

The present invention relates to a coil unit insertion method and an apparatus for inserting a coil unit into a slot of a stator.

A rotary electric machine such as an electric motor or a generator includes a stator formed in a cylindrical shape and a rotor rotatably arranged in an inner diameter portion of the stator. A coil is inserted in the stator core of the stator.

As a coil, a coil formed into a cylindrical shape by spirally winding a band-shaped integrated wire wire composed of a plurality of wire wires formed into a predetermined corrugated shape is known.

In Patent Document 1, a coil arranged on the inner diameter side of the stator core is moved outward in the radial direction to be inserted into a slot formed in the stator core.

JP-A-2010-98936

In Patent Document 1, the coil is moved radially outward and inserted into the slot of the stator core, but the coil is moved radially outward only by an extrusion jig that presses the coil radially outward for insertion. Attempts require high rigidity and strength, making the device expensive. Alternatively, when trying to increase the size of the device, it is difficult to arrange it in a narrow space on the inner diameter side of the core.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a coil unit insertion method and an apparatus capable of simplifying the apparatus and also being compatible with a small-diameter rotary electric machine.

The coil unit insertion method of the present invention is formed in an annular shape by a plurality of coil members having a straight portion arranged in a plurality of slots provided in an annular stator core and a turn portion connecting the straight portions. This is a coil insertion method in which a plurality of coil units in which a plurality of coil members are arranged in an annular radial direction and a circumferential direction are inserted into the plurality of slots, and the coil unit is held on the inner diameter side of the coil unit. The first step of causing the jig to hold each of the plurality of coil members in a predetermined arrangement order in the radial direction of the coil unit in a reduced diameter state, and the plurality of coil members held by the holding jig. A second step of arranging the holding jig inside the stator core with each facing each of the corresponding plurality of slots, and the holding jig holding each of the plurality of coil members. By rotating the stator core and the stator core at the same rotation speed with the central axis of the stator core as the center of rotation, each of the plurality of coil members is moved outward in the radial direction of the stator core and described in the predetermined arrangement order. It is characterized by comprising a third step of inserting into each of a plurality of slots. By rotating the holding jig that holds each of the plurality of coil members and the stator core at the same rotation speed with the central axis of the stator core as the center of rotation, the plurality of coils by the holding jig. The holding of each of the members is released, and each of the plurality of coil members can move outward in the radial direction of the stator core.

According to the coil insertion method of the present invention, the coil member is moved outward in the radial direction and inserted into the slot by the centrifugal force applied to the coil member, so that the coil member can be easily inserted with a simple configuration in which the jig and the stator are rotated. Can be inserted into the slot.

Further, it is preferable to perform the third step with the insulator fitted in the coil.

According to this configuration, since each of the plurality of coil members is held in a predetermined arrangement order by the insulator, the plurality of coil members can be reliably inserted into the slots in a predetermined arrangement order without being separated. it can.

Further, when each of the plurality of coil members is moved outward in the radial direction of the stator, it is preferable to be guided by a guide member extending from the outer peripheral side to the inner peripheral side of the stator.

According to this configuration, the guide member guides the movement of the coil member, so that the coil member can be moved smoothly.

Further, when the coil unit is moving outward in the radial direction, it is preferable to insert the coil unit while pressing the turn portion from the axial direction toward the stator core.

According to this configuration, when the coil member is moved outward in the radial direction by centrifugal force, it is possible to assist the turn portion from being deformed in the axial direction as the pitch in the circumferential direction between the straight portions of the coil member increases. it can.

The coil unit insertion device of the present invention is formed in an annular shape by a plurality of coil members having a straight portion arranged in a plurality of slots provided in an annular stator core and a turn portion connecting the straight portions. A coil insertion device for inserting a plurality of coil units in which a plurality of coil members are arranged in an annular radial direction and a circumferential direction into the plurality of slots, the coil members are arranged on the inner diameter side of the coil unit, and the coil unit is inserted into the plurality of slots. A holding jig that holds each of the plurality of coil members in a predetermined arrangement order in the radial direction of the coil unit in a reduced diameter state, and each of the plurality of coil members held by the holding jig A rotating mechanism that rotates the holding jig and the stator core, which are arranged inside the stator core so as to face each of the plurality of corresponding slots, at the same rotation speed with the central axis of the stator core as the center of rotation. It is characterized by having.

According to the coil unit insertion device of the present invention, the coil member is moved outward in the radial direction and inserted into the slot by the centrifugal force applied to the coil member, so that the coil member can be easily configured with a simple structure for rotating the jig and the stator. Can be inserted into the slot.

Further, it is preferable to insert the coil into the plurality of slots with the insulator fitted in the coil unit.

According to this configuration, since each of the plurality of coil members is held in a predetermined arrangement order by the insulator, the plurality of coil members can be reliably inserted into the slots in a predetermined arrangement order without being separated. ..

Further, it is preferable to include a guide member extending from the outer peripheral side to the inner peripheral side of the stator and guiding the movement of each of the plurality of coil members in the radial direction of the stator.

According to this configuration, the guide member guides the movement of the coil member, so that the coil member can be moved smoothly.

Further, it is preferable to have a case for accommodating the holding jig, and the upper and lower surfaces of the inner wall of the case are inclined so that the height becomes lower toward the outer side in the radial direction of the stator core.

According to this configuration, when the coil member is moved outward in the radial direction by centrifugal force, the turn portion can be brought into contact with the upper and lower surfaces of the inner wall of the case, and the turn portion can be easily deformed.

It is a perspective view which shows the stator which concerns on one Embodiment of this invention. It is a top view of the coil member. It is an exploded perspective view which shows the assembly apparatus. It is an exploded perspective view which shows the reduced diameter holding jig, the wave winding coil unit, and an insulator. It is a perspective view which shows the reduced diameter holding jig, the wave winding coil unit, and an insulator. It is a perspective view which shows the assembly apparatus. It is sectional drawing which shows the inside of the assembly apparatus. It is an enlarged cross-sectional view which shows the inside of the assembly device in the state which held the wave winding coil by the diameter reduction holding jig. It is an enlarged cross-sectional view which shows the inside of the assembly device in the state which expanded the diameter of the wave winding coil and inserted it into the slot of a stator core. It is an end view which shows the assembly apparatus of 2nd Embodiment, a wave winding coil unit, and a stator core.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[First Embodiment]
As shown in FIG. 1, a rotary electric machine 8 such as an electric motor or a generator includes a stator 1 formed in a cylindrical shape and a rotor (not shown) rotatably arranged inside the stator 1.

The stator 1 includes a stator core 2 and a wave winding coil unit 3. The stator core 2 has a tubular shape, and a plurality of slots 2a penetrating in the rotation axis direction are provided at intervals in the circumferential direction (for example, 72 in the present embodiment). Each of the plurality of slots 2a communicates with the inner peripheral surface of the stator core 2, and the portion communicating with the inner peripheral surface of the stator core 2 of the slot 2a is formed in a tapered shape (see FIG. 8A). Six core convex portions 2b are formed at a pitch of 60 ° on the outer peripheral portion of the stator core 2.

The wave winding coil unit 3 includes three coil members 10 (see FIG. 2), which will be described in detail later, and is inserted into the slot 2a of the stator core 2.

[Coil member]
As shown in FIG. 1, the coil member 10 has an annular shape when mounted on the stator core 2. Further, the coil member 10 is attached to the stator core 2 by expanding the diameter after being once attached to the reduced diameter holding jig 23, which will be described in detail later, in a state where the diameter is reduced in an annular shape. In the description of each configuration of the coil member 10, the radial direction and the circumferential direction of the diameter reduction holding jig 23 are appropriately referred to as “diameter direction” and “circumferential direction” of the coil member 10.

The wave winding coil unit 3 of the present embodiment is a three-phase coil composed of a U-phase, a V-phase, and a W-phase, and is composed of a total of six sets of coil members 10 in which two U-phases, two V-phases, and two W-phases are formed. The coil members 10 inserted into each slot 2a are arranged in the order of U-phase, U-phase, V-phase, V-phase, W-phase, and W-phase in the circumferential direction.

As shown in FIG. 2, the coil member 10 includes a straight portion 11, an arm portion 12, a turn portion 13, a connecting portion 14, and a bending portion 15, and these elements 11 to 15 are integrally formed by bending. It is formed.

The straight line portion 11 extends along the axial direction and is a portion that is inserted into the slot 2a of the stator core 2 when the coil member 10 is mounted on the stator core 2.

The straight line portions 11 are provided in a positional relationship (offset positional relationship) that is offset in the radial direction by the thickness of the linear portion 11 in the radial direction between adjacent objects in the circumferential direction (left-right direction in FIG. 2). ..

Further, the length between both ends of the straight portion 11 is slightly longer than the size of the slot 2a in the axial direction.

Further, the pair of arm portions 12 and 12 extend from the straight portion 11 to the turn portion 13 so as to approach each other while bending in the circumferential direction side of the wave winding coil unit 3, and the turn portion 13 is one arm portion 12. From one end of the arm portion 12, the axis line extending in the circumferential direction (horizontal direction in FIG. 2) is rotated halfway around the center of rotation and is continuous with one end of the other arm portion 12.

Due to the configuration of the turn portion 13, the pair of arm portions 12, 12 on both sides of the turn portion 13 are configured to be radially offset from each other by the radial thickness of the straight portion 11 described above.

The bent portion 15 connects the pair of arm portions 12 and 12 in front of the folded portion (right end portion in FIG. 2) of the coil member 10 in FIG. 2, and has a diameter corresponding to the radial thickness of the straight portion 11. It is bent in the direction.

Next, an assembling device 20 for assembling the six sets of coil members 10 to the stator core 2 will be described with reference to FIGS. 3 to 8.

As shown in FIG. 3, the assembling device 20 includes an upper case 21, a lower case 22, a diameter reduction holding jig 23, and a plurality of rod-shaped guide members (144 in the present embodiment). 24 and. The assembly device 20 (lower case 22) is rotationally driven by a motor 26 (rotation mechanism), and the motor 26 is controlled to be driven by a control unit 27 connected to the operation panel 28 (see FIG. 6). The number of guide members 24 can be changed as appropriate. In the present embodiment, the coil unit insertion device includes a diameter reduction holding jig 23 and a motor 26.

The upper case 21 sandwiches the stator core 2 and the diameter reduction holding jig 23 between the lower case 22 and the upper guide opening 21a which is formed in a tubular shape having an upper surface and into which the guide member 24 is inserted. 72 pieces are formed at a pitch of 5 °. An upper opening 21b is formed in the central portion of the upper case 21. The upper guide opening 21a is formed at a position where the guide member 24 inserted into the upper guide opening 21a is placed between adjacent slots 2a on the upper surface of the stator core 2 held in the lower case 22, as will be described in detail later. Has been done. There may be a gap between the guide member 24 and the upper surface of the stator core 2.

Six positioning convex portions 21c are formed at a pitch of 60 ° on the outer peripheral portion of the bottom surface of the upper case 21. Further, two positioning shafts 21d projecting downward are attached to the inner peripheral portion of the upper case 21.

The lower case 22 holds the stator core 2, and has a bottomed cylindrical shape, and six insertion portions 22a having recesses into which the core convex portions 2b of the stator core 2 are inserted are formed at a pitch of 60 °. There is.

The lower case 22 is formed with 72 lower guide openings 22b into which the guide member 24 is inserted at a pitch of 5 °. A stepped shaft portion 22c inserted into the jig hole 23a of the diameter reduction holding jig 23 and the upper opening 21b of the upper case 21 is formed in the central portion of the lower case 22.

The lower guide opening 22b is formed at a position where the guide member 24 inserted into the lower guide opening 22b abuts between adjacent slots 2a on the lower surface of the stator core 2 held in the lower case 22, as will be described in detail later. Has been done. There may be a gap between the guide member 24 and the lower surface of the stator core 2.

On the upper surface of the lower case 22, six positioning recesses 22d into which the six positioning protrusions 21c of the upper case 21 are inserted are formed at a pitch of 60 °.

As shown in FIG. 4, the diameter reduction holding jig 23 holds the wave winding coil unit 3 in a state where the diameter is reduced smaller than the inner peripheral surface of the stator core 2, and penetrates the central portion in the vertical direction. It is formed in a cylindrical shape in which the jig hole 23a is formed.

At the upper end of the outer peripheral portion of the diameter reduction holding jig 23, upper positioning convex portions 23b for positioning the first and second straight portions 11a and 11b of each coil member 10 of the wave winding coil unit 3 are 72 at a pitch of 5 °. Individually formed.

At the lower end of the outer peripheral portion of the diameter reduction holding jig 23, lower positioning convex portions 23c for positioning the first and second straight portions 11a and 11b of each coil member 10 of the wave winding coil unit 3 are 72 at a pitch of 5 °. Individually formed. The upper positioning convex portion 23b and the lower positioning convex portion 23c are formed vertically symmetrically at the same position in the circumferential direction. Further, on the upper surface of the diameter reduction holding jig 23, two positioning recesses 23d into which the positioning shaft 21d of the upper case 21 is inserted are formed.

Each coil member 10 of the wave winding coil unit 3 is covered with an insulator 30 as an insulating material. In this embodiment, 72 insulators 30 are used. Note that FIG. 4 simply shows a state in which the wave winding coil unit 3 is reduced in diameter without being attached to the diameter reduction holding jig 23.

The insulator 30 has both side surfaces in the circumferential direction and outer surfaces (outer peripheral surfaces) in the radial direction, and has a main body portion 30a inserted into the slot 2a of the stator core 2 and a circumference of the wave winding coil unit 3 at the upper end portion of the main body portion 30a. The upper holding convex portion 30b which is formed so as to project in the direction and the radial direction and abuts on the upper surface of the stator core 2 and the stator core 2 which is formed so as to protrude in the circumferential direction and the radial direction of the wave winding coil unit 3 at the lower end portion of the main body portion 30a. It is provided with a lower holding convex portion 30c that abuts on the lower surface of the. Both ends of the outer peripheral surface of the main body 30a in the circumferential direction are formed in an R shape.

On the outer peripheral portion of the upper holding convex portion 30b, a hook-shaped upper hook portion 30d that protrudes outward and protrudes downward is formed. A hook-shaped lower hook portion 30e that protrudes outward and protrudes upward is formed on the outer peripheral portion of the lower holding convex portion 30c. The upper hook portion 30d and the lower hook portion 30e are formed vertically symmetrically.

A pair of guide portions 30f that expand in the circumferential direction toward the inward in the radial direction are formed on the inner peripheral portion of the upper holding convex portion 30b. The guide portion 30f extends in the vertical direction and is continuous with the inner peripheral portion of the lower holding convex portion 30c. The guide portion 30f can be deformed outward in the circumferential direction when a force is applied from the inside to the outside in the radial direction, and has an elastic deforming force that returns to the original shape after the deformation.

[Set to assembly device]
Next, a method of setting the stator core 2 and the coil member 10 in the assembling device 20 will be described. While deforming the wave winding coil unit 3 so as to reduce the diameter, each of the straight portions 11 of the six sets of coil members 10 is inserted between the adjacent upper positioning convex portions 23b of the diameter reduction holding jig 23. As a result, the coil member 10 is held by the diameter reduction holding jig 23 in a reduced diameter state (first step).

Next, the insulator 30 is fitted to each of the coil members 10 of the wave winding coil unit 3 mounted on the diameter reduction holding jig 23 in a reduced diameter state.

When fitting the insulator 30, the pair of guide portions 30f of the insulator 30 is pressed against the coil member 10 arranged on the outermost circumference of the wave winding coil unit 3. When the pair of guide portions 30f are pressed against the coil member 10, the pair of guide portions 30f are deformed so as to spread in the circumferential direction, and the straight portions 11 having eight layers arranged in the radial direction are inserted into the main body portion 30a of the insulator 30. Will be done. As a result, the insulator 30 is fitted to the coil member 10.

Similarly, when 72 insulators 30 are fitted to the coil members 10, the insulators 30 are fitted to all the coil members 10 of the wave winding coil unit 3 as shown in FIG.

Next, as shown in FIGS. 3 and 6, the six core convex portions 2b of the stator core 2 are inserted into the recesses of the six insertion portions 22a of the lower case 22, and the stator core 2 is inserted into the lower case 22. Attach to.

After the stator core 2 is attached to the lower case 22, the reduced diameter holding jig 23 attached with the wave winding coil unit 3 reduced in diameter is placed on the lower case 22. At this time, the shaft portion 22c of the lower case 22 is inserted into the jig hole 23a of the diameter reduction holding jig 23.

Then, the shaft portion 22c of the lower case 22 is inserted into the upper opening 21b of the upper case 21 to attach the upper case 21 to the lower case 22. At this time, the six positioning protrusions 21c of the upper case 21 are inserted into the six positioning recesses 22d of the lower case 22, and the upper case 21 and the lower case 22 are positioned in the radial and circumferential directions. .. Further, the two positioning shafts 21d of the upper case 21 are inserted into the two positioning recesses 23d of the diameter reduction holding jig 23, and the upper case 21 and the diameter reduction holding jig 23 are in the radial direction and the circumferential direction. Positioned.

When the upper case 21 is attached to the lower case 22, the diameter reduction holding jig 23 and the stator core 2 mounted with the wave winding coil unit 3 reduced in diameter are placed in the upper case 21 and the lower case 22. It will be in the housed state (second step). There is a slight gap between the diameter reduction holding jig 23 and the stator core 2.

Then, the guide member 24 is inserted into each of the 72 upper guide openings 21a of the upper case 21, and the guide member 24 is inserted into each of the 72 lower guide openings 22b of the lower case 22. Each of the inserted guide members 24 is positioned by a positioning portion (not shown).

The guide member 24 inserted into the upper guide opening 21a is placed between adjacent slots 2a on the upper surface of the stator core 2 held in the lower case 22, and the guide member 24 inserted into the lower guide opening 22b is the stator core 2. Abuts between adjacent slots 2a on the lower surface of the.

Through the above steps, as shown in FIGS. 6 and 7, the lower case 22 has the stator core 2, the reduced diameter holding jig 23 in which the wave winding coil unit 3 is reduced in diameter, and the upper case. The guide member 24 is attached to the upper case 21 and the lower case 22 while being integrally attached to the 21 in a positioned state.

As shown in the cross-sectional view shown in FIG. 7, in a state where the stator core 2 and the diameter reduction holding jig 23 mounted in a state where the wave winding coil unit 3 is reduced in diameter are attached to the lower case 22, the wave winding Each insulator 30 fitted in the coil member 10 of the coil unit 3 is positioned so as to face each slot 2a of the stator core 2 (second step). A positioning jig may be used to position each insulator 30 fitted in the coil member 10 of the wave winding coil unit 3 so as to face each slot 2a of the stator core 2.

Further, the guide member 24 protrudes inward from the inner peripheral surface of the stator core 2 and is inserted between adjacent insulators 30 so that the insulator 30 faces each slot 2a of the stator core 2 in the circumferential direction of the insulator 30. Position is positioned.

Then, the operator operates the operation panel 28 to rotate the motor 26 by the control unit 27. The motor 26 is rotated at, for example, about 1000 to 10000 rpm according to the diameter of the stator core 2 and the characteristics of the coil member 10.

When the assembling device 20 (lower case 22) is rotated by the rotation of the motor 26, the stator core 2 and the reduced diameter holding jig 23 mounted with the wave winding coil unit 3 reduced in diameter rotate in the same manner. It is rotated at a speed (third step).

The diameter-reduced wave-wound coil unit 3 is released from being held by the diameter-reduced holding jig 23 by centrifugal force due to rotation, and the diameter is expanded from the state shown in FIG. 8A to the state shown in FIG. 8B.

When the diameter of the wave winding coil unit 3 is expanded, each insulator 30 fitted to the coil member 10 of the wave winding coil unit 3 moves outward in the radial direction and is inserted into each slot 2a (third step). The wave winding coil unit 3 is attached to the stator core 2 (see FIG. 1). The upper holding convex portion 30b of the insulator 30 is placed on the upper surface of the stator core 2, and the lower holding convex portion 30c abuts on the lower surface of the stator core 2.

When the insulator 30 moves outward in the radial direction, the R-shaped portion of the main body portion 30a of the insulator 30 abuts on the tapered portion of the slot 2a, and the insulator 30 is inserted into the slot 2a, so that the load at the time of insertion is increased. The insulator 30 and the wave winding coil unit 3 can be inserted into the slot 2a reliably and small.

Further, the guide member 24 projects inward from the inner peripheral surface of the stator core 2 and guides the movement of the insulator 30 when the insulator 30 moves outward in the radial direction.

Further, when each insulator 30 fitted to the coil member 10 of the wave winding coil unit 3 moves outward in the radial direction and is inserted into each slot 2a, the upper hook portion 30d of the insulator 30 is deformed upward. In this state, the lower hook portion 30e is fitted into a recess (not shown) provided on the upper surface of the stator core 2, and the lower hook portion 30e is recessed (not shown) provided on the lower surface of the stator core 2 in a downwardly deformed state. (Not shown). The upper hook portion 30d and the lower hook portion 30e have an elastic deformation force that tends to return to the original shape, and the upper hook portion 30d and the lower hook portion 30e are pressed against the upper surface and the lower surface of the stator core 2 by this elastic deformation force. .. As a result, the insulator 30 does not come off from the stator core 2.

The control unit 27 stops after driving the motor 26 for a predetermined time. Then, after the rotation of the assembling device 20 is stopped, 144 guide members 24 are removed from the upper case 21 and the lower case 22. Next, after removing the upper case 21 from the lower case 22, the stator core 2 and the diameter reduction holding jig 23 are removed from the lower case 22. At this point, as shown in FIG. 1, the wave winding coil unit 3 is attached to the stator core 2, and the stator 1 is formed.

[Second Embodiment]
As shown in FIG. 9, the upper surface 21e of the inner wall of the upper case 21 is formed so as to be inclined so that the height becomes lower toward the outer side in the radial direction of the stator core 2, and the lower surface 22e of the inner wall of the lower case 22 is formed. It may be formed so as to be inclined so that the height becomes lower toward the outer side in the radial direction of the stator core 2. In FIG. 9, the stator core 2, the wave winding coil unit 3, the upper case 21, and the lower case 22 are shown in a simplified manner, and the diameter reduction holding jig 23 is not shown.

In the second embodiment, when the diameter of the wave winding coil unit 3 is increased by the centrifugal force due to rotation, the turn portion 13 of the wave winding coil unit 3 comes into contact with the upper surface 21e and the lower surface 22e and is pressed inward in the axial direction. Be done. As a result, the turn portion 13 is easily deformed in the circumferential direction, and the straight portion 11 is easily inserted into the slot 2a.

The present invention has been described above with respect to preferred embodiments thereof, but as can be easily understood by those skilled in the art, the present invention is not limited to such embodiments and deviates from the gist of the present invention. It can be changed as appropriate as long as it does not.

For example, the number of coil members 10 constituting the wave winding coil unit 3 can be appropriately changed as long as it is plural.

Further, in the above embodiment, the insertion is performed only by the centrifugal force applied to the coil member 10, but in addition to the centrifugal force, an auxiliary extrusion jig for pushing the coil member 10 outward in the radial direction may be provided. Since the composition and strength required by the extrusion jig at that time are smaller than those required when inserting only with the extrusion jig, the device can be miniaturized.

Further, in the above embodiment, the insulator 30 is formed with an upper holding convex portion 30b, a lower holding convex portion 30c, an upper hook portion 30d, a lower hook portion 30e, a pair of guide portions 30f, and the like, but the shape of the insulator. Can be changed as appropriate, and each part 30b to 30f does not have to be formed.

In addition, not all of the components shown in the above embodiments are indispensable, and they can be appropriately selected as long as they do not deviate from the gist of the present invention. For example, the insulator 30 and the guide member 24 may not be provided.

Further, in the above embodiment, the coil member 10 created at the pitch arranged in the slot 2a of the stator core 2 is reduced in diameter and mounted on the diameter reduction holding jig 23, but the coil member 10 is originally created at the reduced diameter state pitch. The coil member 10 may be mounted on the diameter reduction holding jig 23 without going through the step of reducing the diameter.

1 ... stator, 2 ... stator core, 3 ... wave winding coil unit (coil unit), 8 ... rotary electric machine, 10 ... coil member, 11 ... straight line part, 13 ... turn part, 20 ... assembly device, 21 ... upper case ( Case), 22 ... Lower case (case), 23 ... Reduced diameter holding jig (holding jig), 24 ... Guide member, 26 ... Motor (rotation mechanism), 30 ... Insulator

Claims (8)

A plurality of coil members having a straight portion arranged in a plurality of slots provided in the annular stator core and a turn portion connecting the straight portions are formed in an annular shape, and the plurality of coil members are formed in an annular direction and in the annular radial direction. This is a coil unit insertion method in which a plurality of coil units arranged in the circumferential direction are inserted into the plurality of slots.
The first step of holding the coil unit in a holding jig arranged on the inner diameter side of the coil unit in a reduced diameter state in a predetermined arrangement order in the radial direction of the coil unit. When,
The second step of arranging the holding jig inside the stator core in a state where each of the plurality of coil members held by the holding jig faces each of the corresponding plurality of slots.
By rotating the holding jig holding each of the plurality of coil members and the stator core at the same rotation speed with the central axis of the stator core as the center of rotation, each of the plurality of coil members is rotated by the stator core. A third step of moving the coil outward in the radial direction and inserting it into each of the plurality of slots in the predetermined arrangement order.
A method of inserting a coil unit, which comprises. In the coil unit insertion method according to claim 1,
A method for inserting a coil unit, which comprises performing the third step in a state where an insulator is fitted in the coil unit. In the coil unit insertion method according to claim 1 or 2.
A coil unit insertion method, characterized in that when each of the plurality of coil members is moved outward in the radial direction of the stator core, the coil unit is guided by a guide member extending from the outer peripheral side to the inner peripheral side of the stator core. In the coil unit insertion method according to any one of claims 1 to 3,
A method for inserting a coil unit, which comprises pressing the turn portion from the axial direction toward the stator core while inserting the coil unit while the coil unit is moving outward in the radial direction. A plurality of coil members having a straight portion arranged in a plurality of slots provided in the annular stator core and a turn portion connecting the straight portions are formed in an annular shape, and the plurality of coil members are formed in an annular direction and in the annular radial direction. A coil unit insertion device that inserts a plurality of coil units arranged in the circumferential direction into the plurality of slots.
A holding jig arranged on the inner diameter side of the coil unit and holding the coil unit in a reduced diameter state in a predetermined arrangement order in the radial direction of the coil unit.
The holding jig and the stator core, which are arranged inside the stator core so that each of the plurality of coil members held by the holding jig faces each of the corresponding plurality of slots, are described. A rotation mechanism that rotates at the same rotation speed with the central axis of the stator core as the center of rotation,
A coil unit insertion device characterized by comprising. In the coil unit insertion device according to claim 5,
A coil unit insertion device, characterized in that the coil unit is inserted into the plurality of slots with an insulator fitted in the coil unit. In the coil unit insertion device according to claim 5 or 6.
A coil unit insertion device comprising a guide member extending from the outer peripheral side to the inner peripheral side of the stator core and guiding the movement of each of the plurality of coil members in the radial direction of the stator core. In the coil unit insertion device according to any one of claims 5 to 7.
It has a case for accommodating the holding jig.
A coil unit insertion device characterized in that the upper and lower surfaces of the inner wall of the case are inclined so that the height becomes lower toward the outer side in the radial direction of the stator core.