Aligned coil manufacturing apparatus and manufacturing method of aligned coil

Abstract

The present application relates to a manufacturing device of an aligned coil which aligns a plurality of segment coils in a circular ring shape. The manufacturing device of the aligned coil includes a jig formed of a plurality of guides radially arranged at a predetermined angle interval, and having a plurality of slits into which the legs of the segment coils are inserted. The plurality of guides include a first guide and a second guide. The second guide has a protruding portion which protrudes more toward the connecting portion side of the inserted segment coil than the first guide.

Description

Technical Field

[0001] This invention relates to an apparatus for manufacturing coils and a method for manufacturing coils. Background Technology

[0002] Patent Document 1 discloses a coil manufacturing apparatus comprising: a plurality of slits arranged radially at predetermined angular intervals; an inner diameter side guide that variably guides the feet of segmented coils inserted into the slits from the inner diameter side; and an outer diameter side guide that variably guides the feet of segmented coils inserted into the slits from the outer diameter side.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2024-124842 Summary of the Invention

[0004] In Patent Document 1, it is possible to form coils of various diameters by changing the guide positions based on the inner diameter side guide and the outer diameter side guide. When multiple segmented coils are arranged in a circular pattern, it is desirable to maintain the posture of the segmented coils inserted into the slit to suppress coil tilting.

[0005] The present invention was made in view of this, and its object is to provide an apparatus for manufacturing coils and a method for manufacturing coils that can suppress tilting of the segmented coils when multiple segmented coils are arranged in a circular ring.

[0006] The present invention relates to an apparatus for manufacturing coils in which multiple segmented coils having two legs extending parallel to each other and a connecting portion connecting the two legs are arranged in a circular pattern to form a coil array. The apparatus is characterized by comprising: a clamp formed of multiple guides arranged radially at predetermined angular intervals, and having multiple slits for inserting the legs of the segmented coils; the multiple guides including a first guide and a second guide, the second guide having a protrusion that protrudes further toward the connecting portion of the inserted segmented coil than the first guide.

[0007] Selectively, the second guide is configured each time a predetermined number of the first guides are configured, and the plurality of segmented coils include a first coil and a second coil with a shape different from the first coil, the first coil abutting against the upper surface of the protrusions of at least two of the second guides, and the second coil abutting against the upper surface of the first guide and the upper surface of the first coil.

[0008] Optionally, the protrusion is formed integrally on the second guide, and the coil manufacturing apparatus further comprises: an inner diameter side guide for guiding the foot of the segmented coil inserted into the slit from the inner diameter side; and an outer diameter side guide for guiding the foot of the segmented coil inserted into the slit from the outer diameter side.

[0009] Optionally, the protrusion is formed on a portion of the second guide, and the segmented coil inserted into the slit abuts against the end face of the outer diameter side of the protrusion.

[0010] The present invention relates to a method for manufacturing an array of coils, which is a method for manufacturing an array of coils by arranging multiple segmented coils having two legs extending parallel to each other and a connecting portion connecting the two legs in a circular arrangement. The method for manufacturing an array of coils is characterized by comprising the following steps: using an array of coil manufacturing apparatus, wherein the array of coil manufacturing apparatus includes: a clamp formed by multiple guides arranged radially at predetermined angular intervals and having multiple slits for inserting the legs of the segmented coils, the multiple guides including a first guide and a second guide, the second guide having a protrusion protruding further than the first guide toward the connecting portion of the inserted segmented coil; inserting each leg into a different slit with the second guide positioned between the two legs; and abutting the connecting portion against the protrusion.

[0011] Invention Effects

[0012] According to the present invention, when multiple segmented coils are arranged in a circular pattern, tilting of the segmented coils can be suppressed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram illustrating the structure of the coil manufacturing apparatus according to Embodiment 1.

[0014] Figure 2 It's enlarged. Figure 1 A diagram of a part of the fixture.

[0015] Figure 3 This is a diagram illustrating the manufacturing method of the coil array according to Embodiment 1.

[0016] Figure 4 This is a diagram illustrating the manufacturing method of the coil array according to Embodiment 1.

[0017] Figure 5 This is an enlarged view of a portion of the fixture of the coil manufacturing apparatus according to Embodiment 2.

[0018] Figure 6This is a diagram illustrating the manufacturing method of the coil array according to Embodiment 2. Detailed Implementation

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. For clarity, appropriate omissions and simplifications have been made in the following descriptions and drawings. Furthermore, in each drawing, the same elements are labeled with the same symbols, and repeated descriptions have been omitted as necessary.

[0020] The embodiment relates to an apparatus for manufacturing annular coils composed of multiple segmented coils. In the manufacturing of a segmented coil stator, the method is as follows: after arranging the segmented coils on a circumference, multiple annular coils with different radial dimensions are aligned and overlapped, and then assembled to an iron core.

[0021] One method for aligning segmented coils involves supporting the coils, which are inserted into multiple slits arranged radially at predetermined angular intervals, using guides on the inner and outer diameter sides, and aligning them while rotating the slits. However, in this method, if there are imbalances in the center of gravity, such as differences in the length of the coil legs, the coils may tilt towards the inner or outer diameter side, making alignment difficult.

[0022] The following describes a coil-aligning manufacturing apparatus that can align multiple segmented coils 20 while maintaining the orientation of the segmented coils 20 without significantly increasing manufacturing costs.

[0023] (Implementation Method 1.)

[0024] Figure 1 This is a diagram illustrating the structure of the coil manufacturing apparatus 10 according to Embodiment 1. Figure 2 It's enlarged. Figure 1 A diagram of a portion of clamp 11. Figure 3 , 4 This is a diagram illustrating the manufacturing method of the coil array according to Embodiment 1.

[0025] First, the segmented coil 20 used in Embodiment 1 will be described. For example... Figure 3 , 4 As shown, the segmented coil 20 has two legs 21 extending parallel to each other and a connecting portion 22 connecting the two legs 21. In Embodiment 1, the plurality of segmented coils 20 forming an array of coils include a first coil 20A and a second coil 20B. The shapes of the first coil 20A and the second coil 20B are different. That is, the bending position in the connecting portion 22 of the first coil 20A is different from the bending position in the connecting portion 22 of the second coil 20B. In addition, the distance between the two legs 21 of the first coil 20A and the second coil 20B is equal.

[0026] The first coil 20A has an upwardly protruding convex portion 23 at the center of the connecting portion 22. The first coil 20A has a roughly U-shaped shape that is symmetrical about the left and right sides with respect to the convex portion 23. The second coil 20B has a stepped portion 24 at the center of the connecting portion 22. In the connecting portion 22, the lower part of the stepped portion 24 is designated as the lower section 24A, and the upper part is designated as the upper section 24B. The two legs 21 of the second coil 20B have different lengths. That is, the second coil 20B has a left-right asymmetrical shape.

[0027] The coil manufacturing apparatus 10 includes Figure 1 The clamp 11 is shown. The clamp 11 is a component for arranging a plurality of segmented coils 20 in a circular arrangement. The clamp 11 is generally disc-shaped, for example, rotatably supported on a support platform (not shown). The clamp 11 has a plurality of guides 14 arranged radially at predetermined angular intervals. The plurality of guides 14 form a plurality of slits 15 for inserting the feet 21 of the segmented coils 20.

[0028] Furthermore, the guide 14 and the slit 15 are provided corresponding to the slots of the stator core, which are the objects for assembling the coils. Figure 1 In the example shown, corresponding to the 48 slots in the stator core, the clamp 11 has 48 slits 15 and 48 guides 14. However, the number of guides 14 and slits 15 is not limited to this example.

[0029] The coil manufacturing apparatus 10 includes an insertion device (not shown) for inserting segmented coils 20 into slits 15 of a clamp 11. The insertion device includes, for example, an arm extending above the clamp 11 and a gripping portion (both not shown) located at the front end of the arm. The insertion device can grip the segmented coils 20 via the gripping portion and insert the two legs 21 of the segmented coils 20 into two slits 15 located at separate positions on the clamp 11.

[0030] That is, one leg 21 of the segmented coil 20 is inserted into a slit 15 of the clamp 11, and the other leg 21 of the segmented coil 20 is inserted into another slit 15 that is separated from the first slit 15 by a predetermined number of slits. In this way, the positions of the two legs 21 of the segmented coil 20 in the circumferential direction are determined.

[0031] By rotating the clamp 11 by a predetermined angle each time, the insertion position of the segmented coils 20 in the clamp 11 can be displaced in units of slit 15. The coil manufacturing apparatus 10 inserts the segmented coils 20 into the slit 15 of the clamp 11 via an insertion device each time the clamp 11 is rotated by a predetermined angle. By inserting the segmented coils 20 through one revolution of the clamp 11, a circular coil array composed of multiple segmented coils 20 is formed.

[0032] The coil manufacturing apparatus 10 also includes an inner diameter side guide 12 and an outer diameter side guide 13. The clamp 11 is rotatably disposed relative to the inner diameter side guide 12 and the outer diameter side guide 13. The inner diameter side guide 12 has an outer peripheral surface that supports the foot 21 of the segmented coil 20 inserted into the slit 15 of the clamp 11 from the inner diameter side. The outer diameter side guide 13 has an inner peripheral surface that supports the foot 21 of the segmented coil 20 inserted into the slit 15 of the clamp 11 from the outer diameter side.

[0033] The inner diameter side guide 12 can change the radial position of its outer circumferential surface inside the outer diameter side guide 13. The outer diameter side guide 13 can change the radial position of its inner circumferential surface outside the inner diameter side guide 12. A gap 16 with a constant radial width is formed between the outer circumferential surface of the inner diameter side guide 12 and the inner circumferential surface of the outer diameter side guide 13. Two legs 21 of the segmented coil 20 are inserted into the gap 16.

[0034] Alternatively, a V-shaped guide groove 12A can be formed in the inner diameter side guide 12 at the insertion position of one leg 21 of the segmented coil 20. This allows the segmented coil 20 to be inserted into the slit 15 at a predetermined angle relative to the circumference of the gap 16. Therefore, a new segmented coil 20 can be inserted into the slit 15 without interfering with the segmented coils 20 already arranged in the gap 16.

[0035] If, after inserting the segmented coil 20 into the slit 15 of the clamp 11, the clamp 11 is rotated by a predetermined angle, the inserted segmented coil 20 moves together with the clamp 11. At this time, the foot 21 inserted into the guide groove 12A moves along the side of the guide groove 12A toward the outer diameter side. This eliminates the tilt of the segmented coil 20 relative to the circumference of the gap 16, allowing the two feet 21 of the segmented coil 20 to be aligned in the gap 16.

[0036] By arranging multiple segmented coils 20 throughout the entire circumference of the gap 16, the legs 21 of the multiple segmented coils 20 forming a circular array of coils are ultimately arranged in the gap 16. The coil manufacturing apparatus 10 can change the radius of the circumference of the gap 16 by changing the radius of the outer circumferential surface of the inner diameter side guide 12 and changing the radius of the inner circumferential surface of the outer diameter side guide 13.

[0037] As for the inner diameter side guide 12 and the outer diameter side guide 13, for example, known structures such as those disclosed in Japanese Patent Application Publication No. 2024-124842 can be adopted. Thus, the coil manufacturing apparatus 10 can form coils with different radial dimensions. By aligning and overlapping multiple annular coils with different radial dimensions and assembling them onto the stator core, a segmented coil type stator can be manufactured.

[0038] like Figure 2 As shown, the plurality of guides 14 include a first guide 14A and a second guide 14B. A protrusion 17 is integrally formed on the second guide 14B. That is, the protrusion 17 is formed from the end on the inner diameter side of the second guide 14B to the end on the outer diameter side. The upper surface of the protrusion 17 of the second guide 14B is located closer to the connection portion 22 of the inserted segmented coil 20 than the upper surface of the first guide 14A. That is, the upper surface of the protrusion 17 is located higher than the upper surface of the first guide 14A.

[0039] The second guide 14B is configured when a predetermined number of first guides 14A are configured. In Embodiment 1, one second guide 14B is configured for every three first guides 14A. That is, four groups of guides 14, consisting of three first guides 14A and one second guide 14B, are repeatedly arranged along the circumferential direction. Therefore, the 48 guides 14 include 36 first guides 14A and 12 second guides 14B.

[0040] The first coil 20A, with a symmetrical shape, is inserted into the slit 15 in a manner that spans at least two second guides 14B. For example, as Figure 3 As shown, each foot 21 is inserted into the slit 15 between the two feet 21 corresponding to one first coil 20A, sandwiched between the two second guides 14B and the four first guides 14A.

[0041] Specifically, the left leg 21 of the first coil 20A is positioned between adjacent first guides 14A and second guides 14B, serving as a first guide 14A on the left and a second guide 14B on the right. The right leg 21 of the first coil 20A is inserted into the sixth slit 15 from the slit 15 where the left leg 21 is located. The right leg 21 of the first coil 20A is positioned between two adjacent first guides 14A, serving as a first guide 14A on both the left and right sides.

[0042] like Figure 3 As shown, the first coil 20A abuts against the upper surfaces of the two second guides 14B between the two feet 21. On the other hand, the first coil 20A is in a state away from the four first guides 14A between the two feet 21.

[0043] The second coil 20B, with an asymmetrical shape, is positioned after the first coil 20A, completing a full turn of the gap 16. (As follows...) Figure 4 As shown, the second coil 20B is disposed in the slit 15 adjacent to the slit 15 in which the first coil 20A is disposed.

[0044] Specifically, the left leg 21 of the second coil 20B is positioned between adjacent second guides 14B and first guides 14A, serving as a second guide 14B on the left and a first guide 14A on the right. The right leg 21 of the second coil 20B is inserted into the sixth slit 15 from the slit 15 where the left leg 21 is located. The right leg 21 of the second coil 20B is positioned between two adjacent first guides 14A, serving as a first guide 14A on both the left and right sides.

[0045] like Figure 4 As shown, in the connecting portion 22 of the second coil 20B, the lower section 24A abuts against the upper surfaces of the three first guide members 14A between the two legs 21. Furthermore, the upper section 24B abuts against the upper surface of the first coil 20A disposed on the second guide member 14B. That is, the second coil 20B intersects with the first coil 20A and is supported by the first guide member 14A and the first coil 20A.

[0046] Here, for reference Figure 3 , 4 The manufacturing method of the coil arrangement according to the embodiment will be described. First, the positions of the inner diameter side guide 12 and the outer diameter side guide 13 are adjusted according to the radius of the coil arrangement, and a gap 16 for arranging the segmented coils 20 is formed between the outer peripheral surface of the inner diameter side guide 12 and the inner peripheral surface of the outer diameter side guide 13.

[0047] Then, the first coils 20A, symmetrically shaped, are arranged in the gaps 16. The insertion device holds one of the first coils 20A and inserts it into the slits 15 of the clamp 11. Specifically, the insertion device inserts one leg 21 of one of the first coils 20A into a slit 15 at a predetermined position, and inserts the other leg 21 into another slit 15 separated from the first slit 15 by a predetermined number of spaces. Figure 3 As shown, the second guide 14B is located between the two feet 21. Thus, the connecting portion 22 of the first coil 20A abuts against the protrusion 17 of the second guide 14B and is supported.

[0048] Next, by rotating the clamp 11 by a predetermined angle, the inserted first coil 20A is moved together with the clamp 11. At this time, the foot 21 in the guide groove 12A moves along the side of the guide groove 12A toward the outer diameter side. As a result, the two feet 21 of the segmented coil 20 can be aligned in the gap 16.

[0049] Furthermore, in a subsequent process, in order to arrange the second coil 20B between adjacent first coils 20A, the clamp 11 is rotated to create space for the second coil 20B. Then, the insertion device holds another first coil 20A and inserts it into the slit 15 of the clamp 11. This rotation of the clamp 11 and insertion of the first coil 20A into the clamp 11 is repeated until one full rotation of the first coil 20A is completed in the gap 16. Each full rotation of the first coil 20A is then supported by two second guides 14B. Therefore, the pre-assembled first coil 20A is held in its position by the second guides 14B.

[0050] Then, the second coil 20B, with its asymmetrical shape, is arranged in the gap 16 between the inner diameter guide 12 and the outer diameter guide 13. The insertion device holds one second coil 20B and positions it between the previously inserted adjacent first coils 20A. Specifically, the insertion device inserts one leg 21 of one second coil 20B into a slit 15 at a predetermined position, and inserts the other leg 21 into another slit 15 separated from one slit 15 by a predetermined number of slits.

[0051] like Figure 4 As shown, the previously configured first coil 20A and the subsequently configured second coil 20B are arranged to cross each other. The lower section 24A of the second coil 20B abuts against the first guide 14A, and the upper section 24B abuts against the upper surface of the previously configured first coil 20A. As described above, since the orientation of the pre-assembled first coil 20A is maintained, the orientation of the subsequently assembled second coil 20B is also maintained.

[0052] Then, the rotation of clamp 11 and the insertion of the second coil 20B into clamp 11 are repeated until the insertion of the second coil 20B is completed for one revolution of gap 16. Thus, a circular coil arrangement in which the first coil 20A and the second coil 20B are alternately arranged can be completed in gap 16.

[0053] The coils manufactured through the above steps are pulled upward from the coil manufacturing device 10, and each leg 21 of the multiple segmented coils 20 can be inserted into the slit of the stator core while maintaining the multiple segmented coils 20 in a circular arrangement.

[0054] Furthermore, when continuing to manufacture coils with different radii, the above series of steps can be repeated. This series of steps can be executed automatically under the control of a computer (not shown) provided in the coil manufacturing apparatus 10, or manually by an operator.

[0055] In the comparative example, no protrusion 17 is provided on the guide 14. That is, in the comparative example, the position of the upper surface of all guides 14 is approximately constant. Using the fixture 11 of this comparative example, for example, if two different shapes of first coil 20A and second coil 20B are alternately arranged to manufacture a row of coils, segmented coils 20 that do not abut against the guides 14 will be produced.

[0056] For example, the lower section 24A of the asymmetrical second coil 20B abuts against the guide 14, but the upper section 24B does not abut against the guide 14. Furthermore, the first coil 20A does not abut against the guide 14, making it difficult to maintain the posture of the first coil 20A and the second coil 20B.

[0057] Thus, in the comparative example, when arranging multiple segmented coils 20 with different bending positions in a circular pattern, it is difficult to maintain the posture of the segmented coils 20. Therefore, when inserting a new segmented coil 20, if the segmented coil 20 already inserted into the slit 15 is rotated relative to each other in the circumferential direction, the segmented coil 20 will interfere with other components, and sometimes it will be impossible to arrange the new segmented coil 20 in the gap 16.

[0058] In contrast, in Embodiment 1, the first coil 20A abuts against the second guide 14B, which has a protrusion 17, to maintain its position. Furthermore, the lower section 24A of the second coil 20B abuts against the first guide 14A, and the upper section 24B abuts against the upper surface of the first coil 20A. Thus, multiple segmented coils 20 with different shapes can be arranged in a ring while maintaining their respective positions.

[0059] Thus, according to Embodiment 1, in the case of multiple segmented coils 20 with different shapes arranged in a row, the posture of the segmented coils 20 can be maintained without significantly increasing manufacturing costs.

[0060] Furthermore, in Embodiment 1, an example is shown where the radial positions of the outer peripheral surface of the inner diameter side guide 12 and the inner peripheral surface of the outer diameter side guide 13 are variable, but the radial positions of the inner diameter side guide 12 and the outer diameter side guide 13 can also be fixed. Also, the protrusion 17 provided on the second guide 14B can be of any shape as long as it maintains the posture of the inserted segmented coil 20. The order in which the segmented coils 20 are arranged can be of any order as long as it maintains their posture.

[0061] (Implementation Method 2.)

[0062] Figure 5 This is an enlarged view of a portion of the clamp 11A used in the coil manufacturing apparatus 10 according to Embodiment 2. Figure 6 This is a diagram illustrating the manufacturing method of the aligned coils according to Embodiment 2. Figure 6The following example is shown: whenever a segmented coil 20C is inserted into a slit 15, the clamp 11A rotates counterclockwise by one slit 15, inserting the next segmented coil 20C into the slit 15 adjacent to the slit 15 to the right of the slit 15 where the segmented coil 20C was previously inserted.

[0063] Figure 6 This illustrates a state where segmented coils 20C are sequentially inserted onto the circumference of gap 16, with the right leg 21 of the inserted segmented coil 20C inserted into the slit 15 where the left leg 21 of the initially inserted segmented coil 20C is inserted. Figure 6 In this document, the initially inserted segmented coil 20C is designated as "20C_1", and the segmented coil 20C in the middle of insertion is designated as "20C_n". Furthermore, the structure other than the clamp 11A is the same as in Embodiment 1, therefore descriptions are appropriately omitted.

[0064] First, the segmented coil 20C used in Embodiment 2 will be explained. For example... Figure 6 As shown, in Embodiment 2, the multiple segmented coils 20C all have the same generally U-shaped shape. Each segmented coil 20C has two legs 21 extending parallel to each other and a connecting portion 22 connecting the two legs 21. Each segmented coil 20C has an upwardly protruding portion 23 at the center of the connecting portion 22. The two legs 21 have different lengths. That is, the segmented coil 20C has a left-right asymmetrical shape.

[0065] like Figure 5 As shown, the clamp 11 has a plurality of guides 14 arranged radially at predetermined angular intervals. The plurality of guides 14 form a plurality of slits 15 for inserting the feet 21 of the segmented coil 20C.

[0066] like Figure 6 As shown, the coil manufacturing apparatus 10 includes an inner diameter side guide 12 and an outer diameter side guide 13. The aforementioned clamp 11 is rotatably disposed relative to the inner diameter side guide 12 and the outer diameter side guide 13. In the inner diameter side guide 12, a V-shaped guide groove 12A is formed at the insertion position of one leg 21 of the segmented coil 20C.

[0067] As described above, if the left and right balance of the segmented coil 20C is poor due to differences in length of the left and right legs 21, the segmented coil 20C inserted into the slit 15 of the clamp 11 is prone to tilting towards the inner diameter side or the outer diameter side. For example, at the location where the guide groove 12A of the inner diameter side guide 12 is formed, there is no inner diameter side guide 12 to support the inserted segmented coil 20C or other inserted segmented coils 20C, so it is impossible to limit the tilting of the segmented coil 20C. Therefore, in Embodiment 2, a protrusion 18 is formed on a portion of the second guide 14B. Here, an example of the segmented coil 20C tilting towards the inner diameter side will be described.

[0068] The plurality of guides 14 include a first guide 14A and a second guide 14B. A protrusion 18 is formed on a portion of the second guide 14B. The protrusion 18 extends from, for example, an end on the inner diameter side of the second guide 14B to a predetermined distance on the outer diameter side. The radial length of the protrusion 18 can be determined, for example, based on the diameter of the formed annular coil.

[0069] The upper surface of the protrusion 18 of the second guide 14B is located on the side of the connection portion 22 of the inserted segmented coil 20C, which is closer than the upper surface of the first guide 14A. That is, the upper surface of the protrusion 18 is located higher than the upper surface of the first guide 14A.

[0070] The protrusion 18 is, for example, provided between the slit 15 where one leg of the segmented coil 20C_1 initially inserted into the clamp 11 is inserted and the slit 15 where the other leg is inserted. Figure 6 In the example shown, the protrusions 18 are formed on the two adjacent second guides 14B located on the right side of the slit 15 into which the left foot 21 of the initially inserted segmented coil 20C_1 is inserted. That is, in Figure 6 In the example shown, of the multiple guides 14, two are second guides 14B, and the rest are first guides 14A. Furthermore, the location or number of protrusions 18 is an example, but not limited to this one.

[0071] like Figure 6 As shown, the initially inserted segmented coil 20C_1, when tilted towards the inner diameter side, abuts against the end face of the outer diameter side of the protrusion 18. This restricts the tilting of the segmented coil 20C_1. Thus, according to Embodiment 2, the posture of the segmented coils 20C in an array with left-right imbalance can be maintained by the protrusion 18, allowing for the arrangement of multiple left-right asymmetrical segmented coils 20 without significantly increasing manufacturing costs.

[0072] Furthermore, it is preferable to provide conical surfaces 18A from the upper surface of the protrusion 18 to the two side surfaces on the circumferential side. In this way, by providing conical surfaces 18A on the protrusion 18, when arranging the segmented coils 20 on the circumference while rotating the clamp 11, the segmented coils 20 can be inserted into the slit 15 without being obstructed by the protrusion 18.

[0073] Thus, according to Embodiment 2, by providing a protrusion 18 on the guide 14 of the clamp 11A in the direction in which the segmented coil 20C falls, the tilting of the segmented coil 20C can be suppressed.

[0074] The present invention has been described above with reference to the embodiments described above, but the present invention is not limited to the above embodiments. The present invention is not limited to the above embodiments, and appropriate modifications can be made without departing from the spirit of the invention.

[0075] Symbol Explanation

[0076] 10-Engine assembly manufacturing apparatus, 11-Clamp, 11A-Clamp, 12-Inner diameter side guide, 12A-Guide groove, 13-Outer diameter side guide, 14-Guide, 14A-First guide, 14B-Second guide, 15-Slit, 16-Gap, 17-Protrusion, 18-Protrusion, 18A-Conical surface, 20-Segmented coil, 20A-First coil, 20B-Second coil, 20C-Segmented coil, 21-Foot, 22-Connecting part, 23-Protrusion, 24-Stepped part, 24A-Lower section, 24B-Upper section.

Claims

1. A coil manufacturing apparatus that forms a coil array by arranging a plurality of segmented coils having two legs extending parallel to each other and a connecting portion connecting the two legs in a circular arrangement, the coil array manufacturing apparatus being characterized by comprising: The clamp is formed by a plurality of guides arranged radially at predetermined angular intervals and has a plurality of slits for inserting the legs of the segmented coil. The plurality of guides includes a first guide and a second guide, the second guide having a protrusion that protrudes further toward the connection portion of the inserted segmented coil than the first guide.

2. The coil manufacturing apparatus according to claim 1, characterized in that, The second guide is configured each time a predetermined number of the first guides are configured. The plurality of segmented coils include a first coil and a second coil with a different shape from the first coil. The first coil abuts against the upper surfaces of the protrusions of at least two of the second guides. The second coil abuts against the upper surface of the first guide and the upper surface of the first coil.

3. The coil manufacturing apparatus according to claim 1, characterized in that, The protrusions are formed integrally on the second guide. The coil manufacturing apparatus also includes: An inner diameter side guide guides the foot of the segmented coil inserted into the slit from the inner diameter side; and An outer diameter side guide guides the foot of the segmented coil inserted into the slit from the outer diameter side.

4. The coil manufacturing apparatus according to claim 1, characterized in that, The protrusion is formed on a portion of the second guide. The segmented coil inserted into the slit abuts against the end face of the outer diameter side of the protrusion.

5. A method for manufacturing an array of coils, comprising arranging a plurality of segmented coils having two legs extending parallel to each other and a connecting portion connecting the two legs in a circular arrangement, the method comprising the following steps: A coil manufacturing device is used, wherein... The coil manufacturing apparatus includes: The clamp is formed by a plurality of guides arranged radially at predetermined angular intervals and has a plurality of slits for inserting the legs of the segmented coil. The plurality of guides include a first guide and a second guide, the second guide having a protrusion that protrudes further toward the connection portion of the inserted segmented coil than the first guide; With the second guide positioned between the two feet, each foot is inserted into a different slit; and Make the connecting part abut against the protrusion.

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