CN113746283B - Coil bundle forming device - Google Patents
Coil bundle forming device Download PDFInfo
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- CN113746283B CN113746283B CN202110586739.5A CN202110586739A CN113746283B CN 113746283 B CN113746283 B CN 113746283B CN 202110586739 A CN202110586739 A CN 202110586739A CN 113746283 B CN113746283 B CN 113746283B
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 8
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims description 106
- 238000007493 shaping process Methods 0.000 claims description 11
- 230000007423 decrease Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 description 11
- 238000013459 approach Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/06—Embedding prefabricated windings in machines
- H02K15/062—Windings in slots; salient pole windings
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention provides a coil bundle forming device which can form a coil bundle in a manner that the coil bundle can be easily inserted into a slot. A coil bundle forming device (100) is inserted into a plurality of slots penetrating in the axial direction of a stator core, and forms at least a part of an annular coil bundle formed by winding a coil wire, wherein the coil bundle (10) has two coil side parts (11) moving from one axial side to the other axial side of the slots and accommodated in the slots, and coil bridging parts (12) connecting the two coil side parts (11) and arranged on both axial sides of the stator core, the coil bridging parts (12), the plurality of coil wires are arranged in the radial direction of the stator core, and the coil bridging parts (12) on the other axial side are formed in such a manner that the length of the outer side in the radial direction is shorter than the length of the inner side in the radial direction.
Description
Technical Field
The present invention relates to a coil bundle forming apparatus.
Background
Conventionally, a method of manufacturing a stator by inserting a coil into a slot of a stator core is known. For example, japanese patent application laid-open No. 2000-125521 (patent document 1) discloses a coil insertion device for inserting a ring-shaped coil into a slot of a stator core.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2000-125521
Disclosure of Invention
Problems to be solved by the invention
By using the coil insertion device of patent document 1, it is possible to accommodate two coil side portions of an annular coil in a slot and to dispose coil bridge portions connecting the two coil side portions on both sides in the axial direction of the stator core.
However, the present inventors focused on the problem that it is difficult to perform the step of inserting the annular coil into the slot using the coil insertion device of patent document 1. The present inventors found that this problem arises from the fact that the coil is inclined, so that the length of the coil bridging portion on the outer side in the radial direction is excessive, while the length of the coil bridging portion on the inner side in the radial direction is insufficient.
In view of the above, the present invention provides a coil bundle forming device that forms a coil bundle so as to be easily inserted into a slot.
Means for solving the problems
The coil bundle shaping device according to the first aspect of the present invention is a coil bundle shaping device for shaping at least a part of an annular coil bundle formed by winding a coil wire, the coil bundle being inserted into a plurality of slots penetrating in an axial direction of a stator core, the coil bundle including: two coil side parts moving from one axial side of the slot to the other axial side and accommodated in the slot; and coil bridging parts which are connected with the two coil edge parts and are arranged at the two axial sides of the stator core, wherein a plurality of coil wires are arranged along the radial direction of the stator core at the coil bridging parts at the other axial side, and the coil bridging parts at the other axial side are formed in a way that the length of the outer side in the radial direction is shorter than that of the inner side in the radial direction.
Effects of the invention
The present invention can provide a coil bundle forming device that forms a coil bundle in such a manner that it can be easily inserted into a slot.
Drawings
Fig. 1 is a schematic view of a section of a stator perpendicular to an axial direction.
Fig. 2 is a schematic diagram of a coil bundle forming device according to the embodiment in perspective view.
Fig. 3 is a schematic view of a coil bundle forming device according to the embodiment in perspective view.
Fig. 4 is a schematic view of a coil bundle forming device according to the embodiment in perspective view.
Fig. 5 is a schematic view of a cross section along the axial direction of the coil beam forming apparatus according to the embodiment.
Fig. 6 is a schematic view of a cross section along the axial direction of the coil beam forming apparatus according to the embodiment.
Fig. 7 is a flowchart showing a coil beam forming method according to an embodiment.
Fig. 8 is a schematic view of a cross section of a coil bundle shaping device according to a modification along an axial direction.
In the figure:
1-stator, 10-coil bundle, 11-coil side, 12a, 12 b-coil bridge, 20-stator core, 21-slot, 100-coil bundle forming device, 110, 111, 112-needle bar, 120-stripper, 121 a-hollow, 122-convex, 123-first, 124-second, 130-radial moving mechanism, 131-inclined plane, 133-opening, 140-axial moving mechanism, 142-protruding, 144-inclined plane.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will not be repeated.
In the following description, the direction in which the central axis of the stator 1 extends, that is, the penetration direction of the slot is referred to as the "axial direction". The axial direction is not particularly limited, and includes a vertical direction, a horizontal direction, a direction intersecting these directions, and the like.
The direction orthogonal to the central axis of the stator 1 is referred to as a "radial direction". One side along the radial direction is set as an inner side, and the other side is set as an outer side. The direction along the circular arc centered on the central axis of the stator 1 is referred to as the "circumferential direction".
In addition, the drawings used in the following description may be enlarged to show a part that is a feature for the purpose of highlighting the feature. Thus, the dimensions and ratios of the respective constituent elements are not necessarily the same as the actual ones. For the same purpose, portions other than the features may be omitted and illustrated.
(stator)
As shown in fig. 1, a stator 1 is a component of a motor, and interacts with a rotor, not shown, to generate rotational torque. The stator 1 of the present embodiment is configured to be wound in a distributed manner in which coils are wound across several slots 21. The stator 1 includes a coil bundle 10 and a stator core 20.
< stator core >
The stator core 20 is formed in a hollow cylindrical shape. The stator core 20 is formed by overlapping thin silicon steel plates. A plurality of teeth 23 are radially formed in the stator core 20. Slots 21 are formed between the teeth 23. The teeth 23 extend radially across the slot 21. The slot 21 is formed with a slot opening 22 as a radial opening. The stator core 20 of the present embodiment is an integrated stator core.
< coil bundle >)
As shown in fig. 2, the coil bundle 10 is formed by winding a coil wire into a loop shape. That is, the coil bundle 10 is a loop-shaped coil. The coil wire of the present embodiment is a round wire, but is not particularly limited, and may be a flat wire or the like.
The coil bundle 10 has two coil side portions 11 and a coil bridging portion 12. The two coil sides 11 are received in the slots 21. Specifically, the slot 21 accommodating one coil side 11 is different from the slot 21 accommodating the other coil side 11. The slot 21 for accommodating one coil side 11 and the slot 21 for accommodating the other coil side 11 may be adjacent to each other or may be arranged circumferentially with other slots 21 interposed therebetween.
The coil side 11 is wound in order. That is, in the regular winding, the coil side portions 11 are regularly stacked in a predetermined direction. The coil side portions 11 of the present embodiment are regularly stacked in the slot 21 in the circumferential direction, but are not limited thereto.
The coil bridging portion 12 connects the two coil side portions 11. The coil bridging portions 12 are arranged on both sides in the axial direction. Specifically, the coil bridging portion 12 located on one side in the axial direction is one-side coil end connecting one end portions of the two coil side portions 11. The coil bridging portion 12 located on the other side in the axial direction is the other side coil end connecting the other end portions of the coil side portions 11.
The coil bridging portion 12 has a plurality of coil wires arranged in the radial direction of the stator core 20. Therefore, the coil bridging portion 12 is constituted by the coil bridging portion 12a located radially outside and the coil bridging portion 12b located radially inside. In the present embodiment, the coil bridging portion 12, a plurality of coil wires are arranged in the radial direction, and a plurality of coil wires are arranged in a cross-section in the circumferential direction.
(coil bundle shaping device)
Fig. 2 to 4 are schematic views for three-dimensionally observing the steps of inserting the coil bundle 10 into the slot 21 by the coil bundle forming apparatus 100. In fig. 2 to 4, a part of the structure of the coil beam forming apparatus 100 is omitted. Fig. 5 schematically shows a state after cutting in the axial direction in order to show the main structure of the coil bundle forming device 100. Fig. 6 shows a process of forming one coil bundle in fig. 5. The coil bundle forming device 100 will be described with reference to fig. 2 to 6.
The coil bundle forming device 100 is inserted into a plurality of slots 21 penetrating in the axial direction of the stator core 20, and forms at least a part of an annular coil bundle around which a coil wire is wound. The coil bridging portion 12 on the other side in the axial direction of the coil bundle shaping device 100 is shaped such that the length of the radially outer side is shorter than the length of the radially inner side.
The coil bundle forming device 100 according to the present embodiment inserts the coil bundle 10 formed by winding the coil wire into a ring shape into the plurality of slots 21 penetrating in the axial direction of the stator core 20. In detail, the coil bundle forming device 100 inserts the coil bundle 10 from each slot opening 22 in such a manner as to span two slots 21 of the stator core 20.
The coil bundle forming device 100 includes a plurality of needle bars 110 shown in fig. 2 to 4, a stripper 120 as a coil moving mechanism, a radial moving mechanism 130 shown in fig. 5 and 6, and an axial moving mechanism 140.
< needle bar >
As shown in fig. 2 to 4, the plurality of needle bars 110 hold the bobbin bundle 10. The needle bars 110 are arranged side by side in the circumferential direction of the stator core 20 on the radially inner side of the stator core 20. The needle bar 110 extends in the axial direction of the stator core 20. In detail, the plurality of needle bars 110 are disposed on the same circumference in correspondence with the teeth 23. The bobbin 10 can be easily inserted into the slot 21 by the needle bar 110.
The needle bar 110 of the present embodiment is composed of two needle bars 111, 112. The needle bars 111, 112 are disposed with a plurality of teeth 23 interposed therebetween. The needle bars 111 and 112 guide one coil bundle 10, which is hung on a stripper 120 described later, to the slot 21 in the axial and radial directions. The needle bars 111 and 112 are rod-like members extending in the axial direction. The needle bars 111, 112 are movable in the axial direction.
< stripper >)
The stripper 120 as a coil moving mechanism is disposed radially inward of the stator core 20. Stripper 120 moves along the axial direction of stator core 20. That is, the stripper 120 moves the coil bundle 10 from one side to the other side in the axial direction. The stripper 120 moves the coil bundle 10 axially inside the stator core 20, and inserts a part of the coil bundle 10 from the slot opening 22 into the slot 21. Specifically, the stripper 120 holds the inner side of the bobbin 10 in the radial direction and lifts the bobbin 10 up along the needle bar 110.
As shown in fig. 2 to 6, the stripper 120 includes a main body 121 and a convex portion 122. The body 121 and the protruding portion 122 may be formed of one member or may be formed of different members.
The body portion 121 has a hollow portion 121a on the other axial side. In fig. 2 to 4, the body 121 has a cylindrical shape having a hollow portion 121a penetrating in the axial direction.
The protruding portion 122 is provided at the end portion on the other side in the axial direction, and protrudes toward the other side in the axial direction. Specifically, the protruding portion 122 is provided at the other end portion of the body portion 121 in the axial direction, and protrudes from the other end portion toward the other side in the axial direction.
In at least a part of the convex portion 122, the height position of the other side in the axial direction of the convex portion 122 decreases as going toward the radially inner side. That is, at least a part of the protruding portion 122 expands in diameter toward one axial side. In fig. 5, the height position of the other side in the axial direction of the protruding portion 122 gradually decreases toward the radially inner side in substantially the entire portion of the protruding portion 122 except the radially outermost peripheral portion.
As shown in fig. 5 and 6, the convex portion 122 has a first portion 123 and a second portion 124. The first portion 123 and the second portion 124 may be formed of one member or may be formed of different members.
The first portion 123 is axially opposed to a projection 142 described later. The second portion 124 is radially opposite the radial movement mechanism 130. The second portion 124 is also axially opposite the radial movement mechanism 130. That is, the second portion 124 is not opposed to the protruding portion 142. The first portion 123 is located radially outward of the second portion 124.
The radial movement mechanism 130 is disposed radially inward of the protruding portion 122. Specifically, the radially outer position of the radial movement mechanism 130 is located further inward than the radially outer position of the protruding portion 122.
The radial movement mechanism 130 moves in the radial direction. The coil bundle 10 held by the needle bar 110 is compressed from the radially inner side by the radial moving mechanism 130. In detail, the radial movement mechanism 130 is radially opposed to the second portion 124 of the protrusion 122. Thereby, the radially inner portion of the coil bundle 10 can be radially compressed by the second portion 124 of the convex portion 122 and the radial movement mechanism 130.
The radial movement mechanism 130 is disposed in the hollow portion 121a of the stripper 120. Further, the radial movement mechanism 130 may have a case of being located in the hollow portion 121a of the stripper 120 and a case of not being located in the hollow portion 121a of the stripper 120 by moving in the radial direction.
A portion of the radial movement mechanism 130 contacts the axial movement mechanism 140 and the stripper 120 as it moves radially. In detail, the radial moving mechanism 130 has an inclined surface 131 contacting the axial moving mechanism 140. The inclined surface 131 is inclined radially outward as it goes to the other axial side. The radial movement mechanism 130 has a flat surface 132 that contacts the body 121 of the stripper 120. The flat surface 132 extends in the axial direction.
The radial movement mechanism 130 has an opening 133 on the other axial side. In fig. 5, the radial movement mechanism 130 has an opening 133 penetrating in the axial direction. The opening 133 has the same or a larger opening width as it goes to the other side in the axial direction.
As shown in fig. 6, the axial moving mechanism 140 is disposed radially inward of the plurality of needle bars 110. As shown in fig. 5 and 6, the axial moving mechanism 140 is disposed on the other axial side of the stripper 120. Specifically, the other axial side position of the axial moving mechanism 140 is located on the other side of the other axial side position of the protruding portion 122. The radially outer position of the axial moving mechanism 140 is the same as or outside the radially outer position of the protruding portion 122. The radially outer position of the axial moving mechanism 140 is located further outside than the radially outer position of the radial moving mechanism 130.
The axial moving mechanism 140 moves in the axial direction. The axial movement mechanism 140 performs a movement approaching the convex portion 122 and a movement departing from the convex portion 122. The coil bundle 10 held by the needle bar 110 is compressed from the axial other side by the axial moving mechanism 140. Specifically, the axial movement mechanism 140 approaches the convex portion 122, so that the coil bridging portion 12a on the radially outer side can be compressed in the axial direction by the axial movement mechanism 140 and the convex portion 122.
The axial moving mechanism 140 is disposed in the hollow portion 121a of the stripper 120. Further, the axial moving mechanism 140 may have a case of being located in the hollow portion 121a of the stripper 120 or a case of not being located in the hollow portion 121a by moving in the axial direction. This makes it possible to compactly construct the coil beam forming apparatus 100 including the stripper 120, the axial moving mechanism 140, and the radial moving mechanism 130.
The axial movement mechanism 140 includes a main body 141, a protruding portion 142, and a coupling portion 143. The main body 141, the protruding portion 142, and the connecting portion 143 may be formed of one member or may be formed of different members.
The body portion 141 extends in the axial direction. The body portion 141 of the axial moving mechanism 140 is disposed in the opening 133 of the radial moving mechanism 130. The body 141 may be moved in the axial direction, so as to be positioned in the opening 133 of the radial movement mechanism 130 or not positioned in the opening 133. This makes it possible to compactly construct the coil beam forming apparatus 100 including the stripper 120, the axial moving mechanism 140, and the radial moving mechanism 130. Further, another part of the axial moving mechanism 140 may be disposed in the opening 133 of the radial moving mechanism 130.
The protruding portion 142 is located radially outward of the main body portion 141. The protruding portion 142 protrudes toward the radially outer side of the protruding portion 122 toward the axial direction side. Thereby, the radially outer coil bridging portion 12b can be compressed in the axial direction by the radially outer portion of the protruding portion 122 of the stripper 120 and the protruding portion 142 of the axial moving mechanism 140. Specifically, the protruding portion 142 extends in the axial direction toward the first portion 123 of the protruding portion 122. Thereby, the radially outer coil crossover 12b can be compressed in the axial direction by the first portion 123 and the protruding portion 142.
The end surface of the protruding portion 142 on one axial side is a flat surface extending in the radial direction or an inclined surface inclined inward in the radial direction. The protruding portion 142 is brought into contact with the coil bridging portion 12 on the other axial side by moving in the axial direction to approach the first portion 123 of the protruding portion 122.
The coupling portion 143 couples the main body portion 141 and the protruding portion 142. The coupling portion 143 extends in the radial direction.
The axial movement mechanism 140 moves the radial movement mechanism 130 in the radial direction by the axial movement. Thereby, the number of components for radially moving the radial movement mechanism 130 can be reduced. The radial movement mechanism 130 may also move the axial movement mechanism 140 in the axial direction by moving in the radial direction.
A portion of the axial movement mechanism 140 contacts the radial movement mechanism 130 with axial movement. In detail, the axial moving mechanism 140 has an inclined surface 144 that contacts the radial moving mechanism 130. The inclined surface 144 is inclined radially outward as it goes to the other axial side. The inclined surface 144 is formed in the main body 141. When at least one of the axial direction moving mechanism 140 and the radial direction moving mechanism 130 has the inclined surfaces 144 and 131 contacting the other, the radial direction moving mechanism 130 can be easily moved in the radial direction by the axial direction movement of the axial direction moving mechanism 140.
(coil bundle shaping method and coil inserting method)
Next, a coil bundle forming method and a coil inserting method according to the present embodiment will be described with reference to fig. 1 to 7. The coil forming method and the coil inserting method according to the present embodiment are a forming method and an inserting method of the coil bundle 10 using the coil bundle forming apparatus 100 described above.
First, as shown in fig. 2 and 7, a coil wire is wound in a ring shape to form a coil bundle 10 having two coil side portions 11 accommodated in a slot 21 and coil bridge portions 12 connecting the two coil side portions 11 and arranged on both axial sides of a stator core 20 (step S10). In this step (step S10), a coil wire of a round wire is used. Specifically, for example, the coil wire is wound into a loop shape using a winding die, thereby forming the coil bundle 10.
Then, the coil bundle shaping device 100 is provided to the stator core 20 (step S20). In this step (step S20), the needle bars 111, 112 are disposed radially inward of the stator core 20. The coil bundle 10 is disposed axially below the needle bars 111, 112. In detail, the coil bundle 10 is disposed so as to be supported between the needle bars 111, 112. The stripper 120 is disposed at the center in the radial direction and axially below the plurality of needle bars 111, 112.
Then, as shown in fig. 3, the coil bundle 10 is moved to the other side in the axial direction by the stripper 120 as a coil moving mechanism (step S30). In fig. 3, the stripper 120 is advanced toward the other axial side. At this time, the inner side of the coil bundle 10 is lifted toward the other axial side in a state of being hung on the stripper 120. As shown in fig. 4, when the coil bundle 10 is further moved to the other axial side, the coil side 11 is inserted into the slot 21 in a state where the coil bundle 10 is inclined to the radial inner side.
When the coil bundle 10 is moved by the stripper 120 (step S30), the coil wires constituting the coil bundle 10 are aligned along the convex portions 122 whose height decreases as going toward the radial direction inside.
Then, the coil crossover 12 on the other axial side is formed (step S40). In this step (step S40), the coil crossover 12 on the other side in the axial direction is formed so that the length of the radially outer side is shorter than the length of the radially inner side. Specifically, in this step (step S40), the following is performed.
As shown in fig. 6, the radial movement mechanism 130 is disposed radially inward of the protruding portion 122. The axial moving mechanism 140 is disposed radially inward of the needle bars 111 and 112 and axially on the other side of the stripper 120. When the axial moving mechanism 140 is moved to one axial side, the inclined surface 144 of the axial moving mechanism 140 contacts the inclined surface 131 of the radial moving mechanism 130, and the radial moving mechanism 130 moves radially outward. In this way, the axial movement mechanism 140 moves the radial movement mechanism 130 in the radial direction by the axial movement.
The axial movement mechanism 140 moves toward one axial side to approach the convex portion 122, and the axial movement mechanism 140 and the convex portion 122 come into contact with the coil bridging portion 12 on the other axial side. In detail, the protruding portion 142 of the axial moving mechanism 140 moves toward one axial side, approaching the first portion 123 of the protruding portion 122, so that the protruding portion 142 and the protruding portion 122 come into contact with the coil bridging portion 12 on the other axial side. The height position of the other side in the axial direction of the convex portion 122 decreases toward the radially inner side, and therefore the tension applied to the coil bridging portion 12 of the other side in the axial direction by the protruding portion 142 decreases toward the radially inner side. That is, the protruding portion 142 of the axial movement mechanism 140 approaches the protruding portion 122, so that the coil bridging portion 12a on the radially outer side can be compressed in the axial direction by the protruding portion 142 and the protruding portion 122. In detail, the radially outer portion of the coil bundle 10 can be compressed in the axial direction by the first portion 123 and the protruding portion 142 of the protruding portion 122. Therefore, the coil bridging portion 12a located radially outward can be formed so as to have a shorter length than the coil bridging portion 12b located radially inward.
In addition, the radial movement mechanism 130 moves in the radial direction and approaches the convex portion 122, so that the radial movement mechanism 130 contacts the coil bundle 10. Therefore, the coil bundle 10 held by the needle bar 110 can be compressed from the radially inner side. In detail, the radial moving mechanism 130 moves in the radial direction and approaches the second portion 124 of the convex portion 122, so that the radial moving mechanism 130 contacts the coil bundle 10. Therefore, the radially inner portion of the coil bundle 10 can be compressed in the radial direction by the second portion 124 of the convex portion 122 and the radial moving mechanism 130.
Then, the inclined coil bundle 10 is pressed radially outward, and the coil bundle 10 is inserted into the slot 21 (step S40). In this step (step S40), the coil bridging portion 12 on the other side in the inclined axial direction is inclined radially outward (in the direction of arrow a in fig. 4). The movement distance of the radially inner coil bridging portion 12b to the slot 21 is longer than the movement distance of the radially outer coil bridging portion 12a to the slot 21. In the molding step (step S40), the length of the radially inner coil bridging portion 12b is made longer than the length of the radially outer coil bridging portion 12a. Therefore, the length of the radially inner coil bridging portion 12b having a long moving distance is ensured, and therefore the inclined coil bundle 10 can be easily moved radially outward.
The step of forming the coil bundle using the coil bundle forming device 100 (step S40) may be performed simultaneously with the step of inserting the coil bundle into the slot 21 (step S50), or may be performed before the step of inserting the coil bundle into the slot 21 (step S50).
Then, the coil bundle shaping device 100 is detached from the stator core 20 (step S60). Specifically, the needle bar 110 is removed. The stripper 120 is moved downward. The radial movement mechanism 130 and the axial movement mechanism 140 are removed.
By performing the above steps (steps S10 to S60), the coil bundle 10 in which the coil wire is wound in a ring shape can be inserted into the plurality of slots 21 penetrating the stator core 20 in the axial direction. Accordingly, the stator 1 shown in fig. 1 can be manufactured.
In the present embodiment, the two slots 21 into which the coils are inserted are provided as one slot 21 and the other slot 21 with the three slots 21 interposed therebetween, but the present invention is not limited thereto. In addition, in the present embodiment, a method of inserting one coil bundle 10 into two slots 21 is exemplified. It is also possible to insert a plurality of coil bundles 10 into four or more slots 21 at the same time.
(action)
The coil bridging portion 12 on the other side in the axial direction of the coil bundle shaping device 100 of the present embodiment is shaped such that the length of the radially outer side is shorter than the length of the radially inner side. Thus, the length of the radially outer side of the coil bridging portion 12a on the other side in the axial direction is made shorter than the length of the radially inner side of the coil bridging portion 12b on the other side in the axial direction. By forming the coil bundle 10 in this way, when the inclined coil bundle 10 is pressed radially outward of the slot 21 for insertion into the slot 21, the length of the coil bridging portion 12b radially inward is ensured. Therefore, according to the coil bundle forming device 100 of the present embodiment, the coil bundle 10 can be formed so as to be easily inserted into the slot 21.
Here, the stripper 120, which is a coil moving mechanism that moves the coil bundle 10, includes a convex portion 122 protruding toward the other side in the axial direction. Therefore, when the coil bundle 10 is moved by the stripper 120, the coil wires constituting the coil bundle 10 are aligned along the convex portion 122. Further, the height position of the other side in the axial direction of the convex portion 122 decreases as going radially inward. Accordingly, the tension applied to the coil bridging portion 12 on the other side in the axial direction decreases toward the radially inner side. Thus, when the coil bundle 10 is inserted into the slot 21, the coil bundle 10 is shaped in such a manner that the length of the radially outer side of the coil bridging portion 12a is relatively short and the length of the radially inner side of the coil bridging portion 12b is relatively long.
Modification example
In the above-described embodiment, the coil bridging portion 12 on the other side in the axial direction is formed by the stripper 120 as the coil moving mechanism so that the length of the radially outer side is shorter than the length of the radially inner side, but the forming is not limited to the forming by the stripper 120. The coil bridging portion 12 on the other axial side, which is a member different from the stripper 120, may be formed so that the length of the radially outer side is shorter than the length of the radially inner side.
The shape of the radial movement mechanism 130 and the axial movement mechanism 140 of the coil beam forming apparatus 100 is not limited, and may be, for example, as shown in fig. 8. Specifically, the inclined surface 131 of the radial movement mechanism 130 and the inclined surface 144 of the axial movement mechanism 140 incline radially inward as they go to the other axial side. The radial movement mechanism 130 and the axial movement mechanism 140 may be omitted.
The presently disclosed embodiments are considered in all respects only as illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than the foregoing embodiments, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.
Claims (9)
1. A coil bundle shaping device which is inserted into a plurality of slots penetrating in the axial direction of a stator core and which shapes at least a part of an annular coil bundle formed by winding a coil wire, characterized in that,
the device is provided with:
a plurality of needle bars which are arranged side by side in the circumferential direction of the stator core on the inner side in the radial direction of the stator core, extend in the axial direction of the stator core, and hold the coils; and
a coil moving mechanism which is disposed radially inward of the needle bar, moves in an axial direction, moves the coil bundle from one side to the other side in the axial direction,
the coil moving mechanism includes a protrusion provided at an end portion of the other side in the axial direction and protruding toward the other side in the axial direction,
at least a part of the protruding portion, the height position of the other side of the protruding portion in the axial direction decreases toward the radial direction inside,
the coil bundle has:
two coil side parts moving from one axial side to the other axial side of the slot and accommodated in the slot; and
coil bridging parts which connect the two coil edge parts and are arranged at two axial sides of the stator core,
in the coil bridging portion, a plurality of the coil wires are arranged along the radial direction of the stator core,
the coil bridging portion on the other side in the axial direction is formed so that the length of the radially outer side is shorter than the length of the radially inner side.
2. The coil beam forming apparatus according to claim 1, wherein,
the radial movement mechanism is disposed radially inward of the protruding portion and moves in the radial direction.
3. The coil beam forming apparatus according to claim 1 or 2, wherein,
the needle bar assembly further comprises an axial moving mechanism which is arranged on the radial inner side of the needle bars, is arranged on the other axial side of the coil moving mechanism, and moves along the axial direction.
4. A coil beam forming apparatus according to claim 3, wherein,
the axial movement mechanism includes a protrusion protruding toward one side in the axial direction toward a radially outer portion of the protruding portion.
5. The coil beam forming apparatus according to claim 4, wherein,
further comprises a radial moving mechanism which is arranged on the radial inner side of the convex part and moves along the radial direction,
the convex portion has:
a first portion axially opposed to the protruding portion; and
a second portion which is radially opposed to the radial movement mechanism,
the first portion is located radially outward of the second portion.
6. The coil beam forming apparatus according to claim 4 or 5, wherein,
further comprises a radial moving mechanism which is arranged on the radial inner side of the convex part and moves along the radial direction,
the axial movement mechanism moves the radial movement mechanism in the radial direction by axial movement.
7. The coil beam forming apparatus according to claim 6, wherein,
at least one of the axial moving mechanism and the radial moving mechanism has an inclined surface that contacts the other.
8. The coil beam forming apparatus according to claim 7, wherein,
the coil moving mechanism has a hollow portion on the other side in the axial direction,
the axial movement mechanism and the radial movement mechanism are disposed in the hollow portion.
9. The coil beam forming apparatus according to claim 8, wherein,
the radial moving mechanism has an opening on the other side in the axial direction,
the axial movement mechanism is disposed in the opening.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020095028A JP2021191126A (en) | 2020-05-29 | 2020-05-29 | Coil bundle forming device |
| JP2020-095028 | 2020-05-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113746283A CN113746283A (en) | 2021-12-03 |
| CN113746283B true CN113746283B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110586739.5A Active CN113746283B (en) | 2020-05-29 | 2021-05-27 | Coil bundle forming device |
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| Country | Link |
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| JP (1) | JP2021191126A (en) |
| CN (1) | CN113746283B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239739A (en) * | 2009-03-31 | 2010-10-21 | Aisin Aw Co Ltd | Interphase insulation sheet |
| JP2011234501A (en) * | 2010-04-27 | 2011-11-17 | Honda Motor Co Ltd | Stator of motor |
| CN104364996A (en) * | 2012-06-01 | 2015-02-18 | 株式会社安川电机 | Rotating electric machine, stator for rotating electric machine, and vehicle |
-
2020
- 2020-05-29 JP JP2020095028A patent/JP2021191126A/en active Pending
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2021
- 2021-05-27 CN CN202110586739.5A patent/CN113746283B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010239739A (en) * | 2009-03-31 | 2010-10-21 | Aisin Aw Co Ltd | Interphase insulation sheet |
| JP2011234501A (en) * | 2010-04-27 | 2011-11-17 | Honda Motor Co Ltd | Stator of motor |
| CN104364996A (en) * | 2012-06-01 | 2015-02-18 | 株式会社安川电机 | Rotating electric machine, stator for rotating electric machine, and vehicle |
Also Published As
| Publication number | Publication date |
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| JP2021191126A (en) | 2021-12-13 |
| CN113746283A (en) | 2021-12-03 |
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