Coil insertion device

Abstract

A coil insertion device inserts a coil, formed by coil wire wound in a loop, into a plurality of slots extending axially through the stator core from one side to the other. The coil insertion device includes: a coil moving mechanism disposed radially inside the stator core, moving axially to move the coil; a plurality of blades disposed radially inside the stator core and radially outside the coil moving mechanism along the circumference of the stator core, extending axially, and holding the coil; and a holding member disposed radially inside the stator core and on one axial side of the coil moving mechanism, connected to the coil moving mechanism, and in contact with at least one blade at least radially.

Description

[Technical Field]

[0001] This invention relates to a coil insertion device. [Previous Technology]

[0002] Conventionally, methods for manufacturing a stator by inserting a coil into a slot in the stator core are known. For example, Japanese Patent Application Publication No. 2000-125521 (Patent Document 1) discloses a coil insertion device for inserting an annular coil into a slot in the stator core. In Patent Document 1, it is disclosed that the blade holding the coil is composed of a first movable blade fixed to a stripper and a second movable blade fixed to a blade holder behind the stripper (paragraph

[0008] ).

[0003] Prior art document Patent document 1: Japanese Patent Application Publication No. 2000-125521.

[0004] The inventors have discovered that in the coil insertion device of the aforementioned Patent Document 1, there is a problem that the first movable blade and the second movable blade flex. [Summary of the Invention]

[0005] The purpose of this invention is to provide a coil insertion device for suppressing blade deflection.

[0006] The coil insertion device of the first aspect of the present invention inserts a coil with a coil wire wound in an annular shape into a plurality of slots extending axially through the stator core from one side to the other. The coil insertion device includes: a coil moving mechanism disposed radially inside the stator core, moving axially and moving the coil; a plurality of blades disposed radially inside the stator core and radially outside the coil moving mechanism along the circumference of the stator core, extending axially and holding the coil; and a holding member disposed radially inside the stator core and on one axial side of the coil moving mechanism, connected to the coil moving mechanism, and contacting at least one blade at least radially.

[0007] Effects of the Invention The present invention provides a coil insertion device for suppressing blade deflection.

Implementation Method

[0009] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, in the following drawings, the same or equivalent parts will be labeled with the same reference numerals, and their descriptions will not be repeated.

[0010] Furthermore, in the following description, the direction in which the central axis of the stator 1 extends, i.e., the direction through which the slot 21 passes, is defined as the "axial direction". One side along the axial direction is designated as the lower (rear) side, and the other side as the upper (front) side. The upper (lower) and lower (fronter) directions are used to determine positional relationships and are not limited to actual directions. That is, the lower direction does not necessarily mean the direction of gravity. The axial direction is not particularly limited and includes the vertical direction, the horizontal direction, and directions intersecting these directions.

[0011] In addition, the direction orthogonal to the central axis of stator 1 is defined as "radial". And the direction along the arc centered on the central axis of stator 1 is defined as "circumferential".

[0012] Furthermore, in the accompanying drawings used in the following description, the characteristic parts are sometimes shown enlarged for emphasis and convenience. Therefore, the dimensions and proportions of each component may not be the same as the actual dimensions. In addition, for the same purpose, non-characteristic parts are sometimes omitted from the illustration.

[0013] (Stator) As shown in FIG1, the stator 1 is a component of the motor, which interacts with the rotor (not shown) to generate rotational torque. In this embodiment, the stator 1 is a distributed winding with the coil 10 wound across several slots 21. The stator 1 has the coil 10, the stator core 20, the wedge 30, and the insulating paper 40.

[0014] <Stator Core> The stator core 20 is formed in a hollow cylindrical shape. The stator core 20 is formed by overlapping thin silicon steel sheets. A plurality of pole teeth 23 are formed radially on the stator core 20. Grooves 21 are formed between the pole teeth 23. The pole teeth 23 extend radially through the grooves 21. The grooves 21 are formed with groove openings 22 as radial openings. The stator core 20 of this embodiment is an integral stator core.

[0015] <Coil> The coil 10 is formed by winding a coil wire into a loop. In this embodiment, the coil wire is a round wire, but it is not particularly limited and can also be a flat wire, etc.

[0016] The coil 10 has two coil edges and a coil transition portion. The two coil edges are housed in slots 21. Specifically, the slot 21 that houses one coil edge is different from the slot 21 that houses the other coil edge. The slot 21 that houses one coil edge and the slot 21 that houses the other coil edge can be arranged circumferentially with other slots between them, as shown in FIG. 1, or they can be adjacent (not shown).

[0017] <Wedge> A wedge 30 is located between the coil 10 and the slot opening 22, with the coil 10 disposed within the slot 21. The wedge 30 blocks the slot opening 22. The wedge 30 insulates the stator core 20 from the coil 10. The axial length of the wedge 30 is greater than the axial length of the slot 21.

[0018] The wedge block 30 of this embodiment is U-shaped when viewed axially. Specifically, it includes a circumferential portion extending in the circumferential direction and two radial portions extending radially outward from both ends of the circumferential portion. The circumferential portion and the radial portions may be composed of a single component or may be composed of different components connected together.

[0019] <Insulating Paper> As shown in Figure 1, insulating paper 40 covers the coil 10 inserted into the slot 21. The insulating paper 40 is arranged in the slot 21 along pole teeth that demarcate the space except for the radially inward side. In this embodiment, the insulating paper 40 is U-shaped. In Figure 1, the opening of the insulating paper 40 and the opening of the wedge 30 are in opposite directions to each other.

[0020] In addition, the insulating paper 40 may also have a flange (not shown) that protrudes from one end face of the stator core 20 along the axial direction and folds back, and the insulating paper 40 may also have a flange (not shown) that protrudes from the other end face of the stator core 20 along the axial direction and folds back.

[0021] (Coil Insertion Device) The coil insertion device 100 will be described with reference to Figures 1 to 4. Figure 2 shows the coil insertion device 100. Figures 3 and 4 show the process of inserting the coil 10 into the slot 21, which is performed in the order shown in Figures 3 and 4.

[0022] As shown in Figures 1 to 4, the coil insertion device 100 inserts a coil 10, on which a coil wire is wound in an annular shape, from one side of the axial direction to the other (from the bottom to the top in Figure 2) into a plurality of slots 21 that extend along the axial direction of the stator core 20. In detail, the coil insertion device 100 inserts the coil 10 through the slot openings 22 of the slots 21 of the stator core 20.

[0023] As shown in Figures 2 to 4, the coil insertion device 100 includes multiple blades 110, a peeling member 120 as a coil moving mechanism, a blade base 130, a wedge guide member 140, a wedge pusher member 150, a holding member 160, and a connecting mechanism 170.

[0024] <Blade> As shown in Figure 3, the blade 110 holds the coil 10. The blade 110 is arranged circumferentially on the stator core 20, radially inside the stator core 20 and radially outside the stripper 120, and extends axially. The blade 110 facilitates the insertion of the coil 10 into the slot 21.

[0025] The blade 110 moves along the axial direction. In this embodiment, the blade 110 is a movable blade that moves along the axial direction.

[0026] The blades 110 are arranged circumferentially along the stator core 20. Here, the blades 110 are arranged with a plurality of pole teeth 23 in between. In detail, the plurality of blades 110 and pole teeth 23 are arranged on the same circumference corresponding to each other.

[0027] A coil edge is held by two blades 110. The blades 110 guide the coil 10, which is hooked on the peeler 120 described later, axially and radially to the groove 21.

[0028] The blade 110 has a shape configured in the slot opening 22. The blade 110 is a rod-shaped component extending axially.

[0029] In this embodiment, the radially outer edge of the blade 110 is located at a position closer to the radially inner edge of the stator core 20, but it may also be located at a position closer to the radially outer edge of the stator core 20.

[0030] <Releasing Member> The releasing member 120 is a coil moving mechanism that moves the coil 10. The releasing member 120 is disposed radially inside the stator core 20 and moves axially. The releasing member 120 inserts the coil 10 from one axial side to the other. The releasing member 120 contacts the coil 10. Through the releasing member 120, the coil 10 moves axially within the radially inside the stator core 20, and a portion of the coil 10 is inserted into the slot 21 from the slot opening 22. Specifically, the releasing member 120 hooks onto the radially inside of the coil 10 and pulls the coil 10 up along the blade 110. The releasing member 120 may move axially to the other side together with the blade 110, or it may not move axially to the other side together with the blade 110. In the latter case, the blade 110 moves axially to the other side before the releasing member 120.

[0031] The radially inner side of the annular coil 10 is hooked onto the peeler 120. The diameter of the portion of the peeler 120 that hooks the coil is the distance between the blades 110 of the coil 10.

[0032] In this embodiment, the outer radial edge of the stripper 120 is located at a position closer to the inner radial edge than the inner radial edge of the stator core 20, but it may also be located at a position closer to the outer radial edge than the inner radial edge of the stator core 20.

[0033] The peeling member 120 has a shape disposed in the slot opening 22. In this embodiment, the end of the peeling member 120 on the other axial side is hemispherical. The end face of the peeling member 120 on the other axial side is curved.

[0034] <Blade Mount> The blade mount 130 is disposed radially inside the stator core 20 and on the axial side of the stripper 120. The blade mount 130 holds the blades 110. Here, the blade mount 130 holds one end of a plurality of blades 110.

[0035] The blade mount 130 has a cylindrical shape. The diameter of the blade mount 130 is the distance between the blades 110 that hold the coil 10.

[0036] The blade base 130 and the multiple blades 110 can be composed of a single component or different components.

[0037] <Wedge guide> The wedge guide 140 receives the wedge 30. The wedge guide 140 guides the wedge 30 into the groove 21.

[0038] The wedge guide 140 is disposed on one axial side of the stator core 20 and between adjacent slots 21. The wedge guide 140 extends axially. In this embodiment, a plurality of wedge guides 140 are disposed.

[0039] <Wedge Pusher> The wedge pusher 150 moves the wedge 30 from one axial side to the other. Specifically, the wedge pusher 150 is fixed to the wedge 30. More specifically, the other axial side of the wedge pusher 150 is mounted on one axial side of the wedge 30.

[0040] The wedge pusher 150 moves axially. This causes the wedge 30 to move axially. Specifically, the wedge pusher 150 moves axially via the axial movement of the peeling member 120. Therefore, the insertion direction of the wedge 30 via the wedge pusher 150 is the same as the insertion direction of the coil 10.

[0041] <Retaining Member> The retaining member 160 is disposed radially inside the stator core 20 and on the axial side of the stripper 120. The retaining member 160 is connected to the stripper 120. The retaining member 160 may be directly connected to the stripper 120 or connected to the stripper 120 via other components. Here, the retaining member 160 is connected to the stripper 120 via a connecting mechanism 170.

[0042] The retaining member 160 is in contact with at least one blade 110 at least radially. The retaining member 160 can hold the blade 110 radially. Therefore, when the coil 10 is inserted into the slot 21 using the peeling member 120, the retaining member 160 connected to the peeling member 120 can support the blade 110 radially. Therefore, deflection of the blade 110 can be suppressed.

[0043] In this embodiment, the retaining member 160 contacts the plurality of blades 110 in the radial direction. Here, the retaining member 160 contacts all the blades 110 of the inserted coil 10 in the radial direction.

[0044] Furthermore, the retaining member 160 contacts the blade 110 radially. This improves the effect of holding the blade 110 radially by the retaining member 160. Therefore, it is possible to further suppress the deflection of the blade 110. From the viewpoint of suppressing the deflection of the blade 110, a large contact area is preferable; from the viewpoint of cost reduction, it is preferable that the contact area is below a predetermined value.

[0045] Furthermore, the retaining member 160 moves along with the peeling member 120. Specifically, when the peeling member 120 moves to the other side of the axial direction, the retaining member 160 also moves to the other side of the axial direction. The amount of movement of the peeling member 120 and the amount of movement of the retaining member 160 may be the same or different.

[0046] Specifically, the retaining member 160 is disposed on the other side of the blade holder 130 in the axial direction. Thus, the blade 110 between the blade holder 130 and the stripper 120 is held by the retaining member 160. Therefore, deflection of the blade 110 can be further suppressed.

[0047] The retaining member 160 is disposed between the stripper 120 and the blade holder 130. In FIG. 2, the retaining member 160 is disposed in the middle portion between the stripper 120 and the blade holder 130. Thus, the blade 110 is held by the blade holder 130 on one axial side, held by the stripper 120 on the other axial side, and held by the retaining member 160 in the middle axial portion.

[0048] Furthermore, the retaining member 160 contacts the wedge guide 140 at least radially. Since the wedge guide 140 is retained by the retaining member 160, deflection of the wedge guide 140 can be suppressed. Therefore, buckling of the wedge 30 can be suppressed.

[0049] The retaining member 160 has, for example, a plurality of recesses on its radially outer surface that contact the surface of the blade 110. When viewed axially, the recesses are arc-shaped along the blade 110.

[0050] In this embodiment, the retaining member 160 contacts the plurality of wedge guides 140 in the radial direction. The retaining member 160 may make point contact or surface contact with the wedge guides 140 in the radial direction.

[0051] The axial end face 141 of the wedge guide 140 and the axial end face 151 of the wedge pusher 150 overlap with the retaining member 160 in the axial direction. By holding the wedge guide 140 on the retaining member 160, deflection of the wedge guide 140 can be suppressed, and thus bending of the wedge pusher 150 can be suppressed. Therefore, buckling in the wedge 30 supported by the wedge pusher 150 can be suppressed.

[0052] In this embodiment, when the wedge 30 is inserted into the groove 21, the wedge guide 140 is held by the retaining member 160.

[0053] The bending stiffness of the material constituting the retaining member 160 is less than that of the material constituting the blade 110. Therefore, damage to the blade 110 held by the retaining member 160 can be suppressed. The bending stiffness is a value measured based on JIS Z 2248. In this embodiment, the blade 110 is made of iron, and the retaining member 160 is made of a copper alloy or resin, which is softer than iron.

[0054] The retaining member 160 in Figure 2 is circular when viewed axially. Multiple holes 161 are formed inside the retaining member 160. The holes 161 extend axially. The holes 161 receive the rod-shaped member 171, which will be described later.

[0055] <Connecting Mechanism> The connecting mechanism 170 connects the peeling member 120 and the retaining member 160. Through the connecting mechanism 170, the retaining member 160 moves as the peeling member 120 moves. Therefore, the retaining member 160 can be moved easily.

[0056] The connecting mechanism 170 changes the axial distance between the peeling member 120 and the holding member 160. That is, the axial distance between the peeling member 120 and the holding member 160 is variable through the connecting mechanism 170. As a result, when the coil 10 is held on the blade 110, the axial distance between the peeling member 120 and the holding member 160 can be shortened. Consequently, the length of the blade 110 can be shortened.

[0057] Specifically, as shown in FIG3, when the coil 10 is placed on the blade 110, the distance between the peeling member 120 and the holding member 160 can be shortened by means of the connecting mechanism 170. As shown in FIG4, when the coil 10 is inserted into the slot 21, the distance between the peeling member 120 and the holding member 160 can be lengthened by means of the connecting mechanism 170.

[0058] The connecting mechanism 170 of this embodiment includes a plurality of rod-shaped members 171 and a plurality of plate-shaped members 172. The rod-shaped members 171 extend axially. The plate-shaped members 172 are interconnected by the rod-shaped members 171. Thus, the connecting mechanism 170 can be easily implemented. The rod-shaped members 171 and the plate-shaped members 172 constitute a telescopic mechanism for changing the axial distance between the peeling member 120 and the holding member 160.

[0059] The rod-shaped member 171 extends axially. The axial positions of the plurality of rod-shaped members 171 are different. Furthermore, in Figure 2, the axial positions of two rod-shaped members 171 are the same. Additionally, the number of rod-shaped members 171 is not limited.

[0060] The rod-shaped component 171 has, for example, a bolt and a nut. The bolt includes an axially extending shaft and a head disposed at one end of the shaft. The nut is mounted on the end of the shaft that is axially opposite to the head.

[0061] The plate-shaped member 172 extends radially. The axial positions of the plurality of plate-shaped members 172 are different. In FIG. 2, three plate-shaped members 172 with different axial positions are arranged. Furthermore, the number of plate-shaped members 172 is not limited.

[0062] As shown in FIG. 2, the plate-shaped member 172 has a hole 172a for receiving the rod-shaped member 171. Here, the rod-shaped member 171 can be received in the hole 172a and the hole 161 of the retaining member 160. As a result, a structure that can easily change the axial distance between the peeling member 120 and the retaining member 160 can be realized.

[0063] Furthermore, the radial widths of holes 161 and 172a are relative to the extent to which the rod-shaped member 171 can move. Here, the radial widths of holes 161 and 172a are slightly larger than the diameter of the threaded portion of the screw that forms the rod-shaped member 171.

[0064] The plate-shaped member 172 contacts the blade 110 at least radially. Thus, the blade 110, which is held between the retaining member 160 and the stripping member 120, is held by the plate-shaped member 172. Therefore, deflection of the blade 110 can be further suppressed.

[0065] The plate-shaped component 172 has, for example, a plurality of recesses on its radially outer surface that contact the surface of the blade 110. When viewed axially, the recesses are arc-shaped along the blade 110.

[0066] The number of blades 110 in contact with the retaining member 160 at least in the radial direction is greater than the number of blades 110 in contact with the plate-shaped member 172 at least in the radial direction. Here, the number of recesses provided on the radially outer surface of the retaining member 160 and in contact with the blades 110 is greater than the number of recesses provided on the radially outer surface of the plate-shaped member 172 and in contact with the blades 110.

[0067] The axial thickness of the retaining member 160 is greater than the axial thickness of the plate-shaped member 172. As a result, the area where the blade 110 is held by the retaining member 160 is increased, thereby further suppressing the deflection of the blade 110.

[0068] The connecting mechanism 170 also includes a connecting member 173. In FIG. 2, one end of the connecting member 173 is fixed to the peeling member 120, and the other end of the connecting member 173 is fixed to the plate-shaped member 172. Thus, the connecting member 173 connects the peeling member 120 and the plate-shaped member 172.

[0069] Connecting component 173 may be, for example, a rope, chain, wire, or fixing metal part.

[0070] (Coil Insertion Method) Next, the coil insertion method of this embodiment will be described with reference to FIGS. 1 to 5. The coil insertion method of this embodiment is a method for inserting a coil 10 using the coil insertion device 100 described above. In addition, the illustration of the insulating paper 40 is omitted in FIGS. 2 to 4.

[0071] First, as shown in FIG5, the coil insertion device 100 is disposed on the stator core 20 (step S1). In this step S1, as shown in FIG3, the coil 10 and the coil insertion device 100 are arranged on one axial side of the stator core 20.

[0072] Specifically, the coil 10 is configured to be held between a plurality of blades 110. In addition, a stripper 120 is arranged at the radial center and on one side of the plurality of blades 110. Furthermore, the wedge 30 is configured to be supported by a wedge guide 140 and a wedge pusher 150.

[0073] In this step S1, the retaining member 160 connected to the stripper 120 contacts at least one blade 110 in the radial direction to retain the blade 110. In addition, as shown in FIG3, the plate-shaped members 172 of the connecting mechanism 170 are arranged in a close proximity to each other.

[0074] Next, as shown in FIG5, the peeling member 120 is moved from one axial side to the other (step S2). In this step S2, the peeling member 120 moves together with the blade 110 to the other axial side. In addition, as the peeling member 120 moves, the wedge guide 140 and the wedge pusher 150 move from one axial side to the other.

[0075] In this step S2, as shown in FIG4, the holding member 160 moves from one side of the axial direction to the other as the peeling member 120 moves. Here, the holding member 160 moves axially while supporting the blade 110 radially. In addition, the plate-shaped member 172 of the connecting mechanism 170 moves in a mutually disengaging manner as the peeling member 120 moves.

[0076] By moving the blade 110 and the stripper 120, as shown in Figures 4 and 5, the coil 10 can be inserted into the slot 21 of the stator core 20 (step S3). In addition, by moving the wedge pusher 150, the wedge 30 can be inserted into the slot 21.

[0077] Next, the coil insertion device 100 is removed from the stator core 20 (step S4). Specifically, the stripper 120 is moved axially to one side.

[0078] By performing the above-described processes (steps S1 to S4), coils 10 and wedges 30 can be inserted into the plurality of slots 21 that extend through the axial direction of the stator core 20. As a result, the stator 1 shown in FIG1 can be manufactured.

[0079] In addition, although the insulating paper 40 is not shown in Figures 4 to 7, the process of covering the coil 10 inserted into the slot 21 with the insulating paper 40 is also included. In this process, the insulating paper 40 may be pre-placed in the slot 21 before inserting the coil 10 into the slot 21. Alternatively, the coil 10 covered with the insulating paper 40 may be inserted into the slot 21.

[0080] (Effects) Referring to FIG6, the effects of the coil insertion device 100 of this embodiment will be explained. In FIG6, the conventional coil insertion device 200 is schematically shown on the left, and the coil insertion device 100 of this embodiment is schematically shown on the right. The conventional coil insertion device 200 does not have the holding member 160 and the connecting mechanism 170 of this embodiment.

[0081] The inventors have discovered that the problem of wedge 30 buckling is caused by the following phenomenon. Specifically, as shown in FIG6, when the high duty cycle W-phase coil 10W is inserted, the wedge guide 140 is pushed towards the inner diameter side by the coil ends of the previously inserted U-phase and V-phase coils 10U and 10V. As a result, the blade 110 is pushed towards the inner diameter side, and therefore the blade 110 buckles. In detail, one side of the blade 110 is held by the blade base 130, and the other side of the blade 110 is pressed by the peeling member 120, so the axial middle portion of the blade 110 buckles. Because the wedge guide 140 buckles, the wedge pusher 150 also buckles. When the end of the wedge pusher 150 on the other side of the axial direction buckles, the wedge 30 supported by the wedge pusher 150 bends at the umbrella-shaped part of the stator core 20. Therefore, the problem of wedge 30 buckling occurs.

[0082] To address this problem, the coil insertion device 100 of this embodiment includes a retaining member 160 connected to the stripper 120 and in radial contact with the blade 110. The retaining member 160 can hold the blade 110 radially. Therefore, when the coil 10 is inserted into the slot 21 using the stripper 120, the retaining member 160 connected to the stripper 120 can support the middle portion of the blade 110 radially. Therefore, when inserting the high duty cycle W-phase coil 10W, even if the wedge guide 140 is pushed towards the inner diameter side by the coil ends of the previously inserted U-phase and V-phase coils 10U and 10V, deflection of the blade 110 can be suppressed. As a result, deflection of the end on the other side of the axial direction of the wedge pusher 150 can be suppressed, and thus buckling of the wedge 30 supported by the wedge pusher 150 can be suppressed.

[0083] Thus, in this embodiment, the wedge 30 is inserted into the slot 21 while the deflection of the blade 110 is suppressed by the holding member 160. Therefore, even when inserting a coil 10 with a high duty cycle, buckling of the wedge 30 can be suppressed. Therefore, the coil insertion device 100 of this embodiment can be ideally used to manufacture a stator 1 with a high duty cycle for the coil 10.

[0084] (Modification 1) In the above embodiment, the retaining member 160 has a cylindrical shape, but is not limited thereto. The retaining member 160 can be any structure as long as it is in radial contact with at least one of the blades 110.

[0085] (Modification 2) In the above embodiment, the connecting mechanism 170 includes a rod-shaped member 171 and a plate-shaped member 172, but is not limited thereto. The connecting mechanism 170 may also be a telescopic member, etc.

[0086] (Modification 3) In the above embodiment, as shown in FIG1, the two slots 21 into which the coil is inserted are one slot 21 and another slot 21 that sandwich four slots 21, but it is not limited to this.

[0087] (Modification 4) In the above embodiment, the method of inserting one coil 10 into two slots 21 was described as an example. It is also possible to insert multiple coils 10 into four or more slots 21 at the same time.

[0088] The embodiments disclosed herein should be considered exemplary in all respects and not restrictive. The scope of the invention is shown not by the above embodiments, but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims. [Simplified Explanation of the Diagram]

[0008] Figure 1 is a schematic diagram of a cross-section of the stator perpendicular to the axial direction. Figure 2 is a schematic diagram of a cross-section of the coil insertion device according to the embodiment perpendicular to the axial direction. Figure 3 is a schematic diagram of the coil insertion method according to the embodiment, corresponding to Figure 2. Figure 4 is a schematic diagram of the coil insertion method according to the embodiment, corresponding to Figure 2. Figure 5 is a flowchart of the coil insertion method according to the embodiment. Figure 6 is a schematic diagram comparing the prior art coil insertion device and the coil insertion device according to the embodiment.

Claims

1. A coil insertion device for inserting a coil formed by coil wire wound in a loop into a plurality of slots extending axially through a stator core from one side to the other, the coil insertion device comprising: A coil moving mechanism is disposed radially inside the stator core, moves axially, and moves the coil. A plurality of blades, the plurality of blades being arranged circumferentially around the stator core and radially outward of the coil moving mechanism, extending axially and holding the coil; and a holding member, the holding member being arranged radially inside the stator core and axially on one side of the coil moving mechanism, connected to the coil moving mechanism, and in contact with at least one of the blades at least radially.

2. The coil insertion device according to claim 1 further includes: A blade holder is disposed radially inside the stator core and on one axial side of the coil moving mechanism, and holds the blade. The holding member is disposed on the other axial side of the blade holder.

3. The coil insertion device according to claim 1 or 2 further includes: A wedge guide is disposed on one axial side of the stator core and for housing a wedge, wherein the retaining member is in contact with the wedge guide at least radially.

4. The coil insertion device according to claim 3 further includes: A wedge pusher that moves the wedge from one axial side to the other, wherein the other axial end face of the wedge guide and the other axial end face of the wedge pusher overlap the retaining member in the axial direction.

5. The coil insertion device according to any one of claims 1 to 4, further comprising: A connecting mechanism that connects the coil moving mechanism and the holding component.

6. The coil insertion device according to claim 5, wherein, The connecting mechanism changes the axial distance between the coil moving mechanism and the holding component.

7. The coil insertion device according to claim 5 or 6, wherein, The connecting mechanism includes: a plurality of rod-shaped components extending axially; and a plurality of plate-shaped components interconnected by the rod-shaped components.

8. The coil insertion device according to claim 7, wherein, The retaining member and the plate-shaped member are formed with holes for receiving the rod-shaped member.

9. The coil insertion device according to claim 7 or 8, wherein, The plate-shaped component contacts the blade at least in the radial direction.

10. The coil insertion device according to any one of claims 7 to 9, wherein, The axial thickness of the retaining component is greater than the axial thickness of the plate-shaped component.

11. The coil insertion device according to any one of claims 1 to 10, wherein, The retaining component contacts the blade surface in the radial direction.

12. The coil insertion device according to any one of claims 1 to 11, wherein, The bending stiffness of the material constituting the retaining component is smaller than that of the material constituting the blade.

Images