JP2024065323A - Coil Insertion Device - Google Patents

Abstract

To provide a coil insertion device which can improve productivity of a stator.SOLUTION: A coil insertion device 1 has: a device body part 2; a stator core conveyance part 3, supported by the device body part, which conveys a plurality of stator cores 91 to a coil insertion position P1 where a coil 92 is inserted into a plurality of slots of the stator cores; and a coil insertion part 6 which inserts the coil into the plurality of slots of the stator cores that has been conveyed to the coil insertion position. The stator core conveyance part has: a conveyance table 31 having a plurality of mounting parts 33 on each of which the stator core is mounted; a support part 41 which supports the conveyance table in a manner movable with respect to the device body part; and a drive part 43 which positions one of the plurality of mounting parts at the coil insertion position and positions the rest of the mounting parts at a standby position by moving the conveyance table with respect to the support part. The support part supports the conveyance table at a position closer to the coil insertion position than the standby position.SELECTED DRAWING: Figure 1

Description

The present invention relates to a coil insertion device.

There is a known coil insertion device that inserts a coil that has been wound in a ring shape into the slot of a stator core. For example, Patent Document 1 discloses a composite winding device that has a holding mechanism at the tip of each radially extending arm portion that detachably holds the stator and that moves vertically and turns horizontally, a transfer device that transfers a coil wound by an automatic winding device into an insertion jig, and an automatic coil insertion means equipped with a turning table that turns and transports the coil transferred into the insertion jig to a coil insertion position where it is inserted into the stator in a predetermined holding mechanism of the turning transport means.

Japanese Patent Application Laid-Open No. 60-170446

In the composite winding device of Patent Document 1, the rotating transport means rotates and transports the multiple stator cores it holds, one after another, above the coil insertion position. The automatic coil insertion means rotates and transports the coils wound by the automatic winding device, one after another, to the coil insertion position. Then, the arm tip is moved downward relative to the coil transported to the coil insertion position, inserting the coil into the stator core. In this way, the composite winding device can automatically perform winding work efficiently. Therefore, productivity can be improved compared to devices that insert coils into stator cores one by one.

However, in the composite winding device of Patent Document 1, the rotating transport means holds the stator core at the tip of an arm part away from the center of rotation. The tip of the arm part is not fixed to the device body and can be displaced up and down. Therefore, when the coil is inserted into the stator core, the axial direction of the stator core may change relative to the movement direction of the coil. This may cause the coil to scratch the inner surface of the slot when the coil is inserted. This may result in defective products and reduced productivity of the stators. Therefore, there is a demand for a coil insertion device that can improve stator productivity while suppressing the occurrence of defective products when inserting the coil.

The object of the present invention is to provide a coil insertion device that can improve stator productivity.

The coil insertion device according to an exemplary embodiment of the present invention is a coil insertion device that inserts coils into multiple slots of a stator core. The coil insertion device includes a device main body, a stator core transport unit that is supported by the device main body and transports multiple stator cores to a coil insertion position where coils are inserted into the multiple slots of the stator core, and a coil insertion unit that inserts the coils into the multiple slots of the stator core by moving the coils from one side to the other side in the axial direction of the stator core with respect to the stator core transported to the coil insertion position. The stator core transport unit includes a transport table having multiple mounting parts on which the stator cores are respectively placed, a support unit that supports the transport table movably relative to the device main body, and a drive unit that moves the transport table relative to the support unit to position one of the multiple mounting parts at the coil insertion position and position the remaining mounting parts at a standby position. The support unit supports the transport table at a position closer to the coil insertion position than the standby position.

According to an exemplary embodiment of the present invention, a coil insertion device that can improve stator productivity can be provided.

FIG. 1 is a diagram showing a schematic configuration of a coil insertion device according to a first embodiment. FIG. 2 is a perspective view of the stator core. FIG. 3 is a diagram showing a schematic view of how coils are inserted into slots of a stator core. FIG. 4 is a partial enlarged view of the slots of the stator core into which the coils and wedges are inserted, as viewed from the axial direction. FIG. 5 is a cross-sectional view of the stator core transfer section at a portion supported by the support section. FIG. 6 is a view of the stator core transfer section at the portion supported by the support parts as viewed from the thickness direction of the transfer table. FIG. 7 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 8 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 9 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 10 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 11 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 12 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the first embodiment. FIG. 13 is a diagram illustrating a schematic configuration of a coil insertion device according to the second embodiment. FIG. 14 is a diagram showing how coils are inserted into slots of a stator core by the coil insertion device according to the second embodiment. FIG. 15 is a diagram illustrating a schematic configuration of a coil insertion device according to the third embodiment. FIG. 16 is a view of FIG. 15 seen from the direction A. FIG. 17 is a partial cross-sectional view of the wedge supply and positioning table. FIG. 18 is a diagram illustrating a method for transporting a coil insertion part by the coil insertion device according to the third embodiment. FIG. 19 is a diagram illustrating a method for transporting a coil insertion part by the coil insertion device according to the third embodiment. FIG. 20 is a diagram illustrating a method for transporting a coil insertion part by the coil insertion device according to the third embodiment. FIG. 21 is a diagram illustrating a method for transporting a coil insertion part by the coil insertion device according to the third embodiment. FIG. 22 is a diagram illustrating a method for inserting coils into slots of a stator core by the coil insertion device according to the third embodiment.

Below, exemplary embodiments of the present invention will be described in detail with reference to the drawings. Note that the same or corresponding parts in the drawings will be given the same reference numerals and their description will not be repeated. Also, the dimensions of the components in each drawing do not faithfully represent the actual dimensions of the components and the dimensional ratios of each component.

In the following description, the vertical direction when the coil insertion device 1 is installed is referred to as the up-down direction. The direction parallel to the central axis of the stator core 91 is referred to as the axial direction, the direction perpendicular to the central axis is referred to as the radial direction, and the direction along the arc centered on the central axis when the stator core 91 is viewed from the axial direction is referred to as the circumferential direction.

In addition, in the following description, expressions such as "fixed," "connected," and "attached" include not only cases where members are directly fixed to each other, but also cases where they are fixed via other members. In other words, in the following description, expressions such as "fixed" include the meaning of direct and indirect fixation between members.

(Embodiment 1)
A coil insertion device 1 according to an exemplary embodiment of the present invention will be described with reference to Figures 1 to 12. Figure 1 is a diagram showing a schematic configuration of the coil insertion device 1. The coil insertion device 1 is a device that inserts a coil 92, which has been wound in advance by a coil winding device (not shown), into a slot 95 of a stator core 91.

First, using Figures 2 to 4, we will briefly explain the stator core 91 of a stator as an example into which a coil 92 is inserted by the coil insertion device 1.

As shown in FIG. 2, the stator core 91 is cylindrical. The stator core 91 has an end face 91a located on one side in the axial direction and an end face 91b located on the other side. The stator core 91 has a plurality of slots 95. The plurality of slots 95 penetrate the stator core 91 in the axial direction. The plurality of slots 95 have openings 95a on the radially inner side of the stator core 91.

As shown in FIG. 3, a wound coil 92 is inserted into the slot 95 of the stator core 91. Also, although not shown, a wedge 94 is inserted into the slot 95 of the stator core 91.

Figure 4 is a partially enlarged view of the stator core 91 in the axial direction with the coil 92 and wedge 94 inserted in the slot 95. As shown in Figure 4, the coil 92 and wedge 94 are located in the slot 95. The wedge 94 is located on the opening 95a side in the slot 95. The wedge 94 is a resin member that is long in the axial direction of the stator core 91. The wedge 94 prevents the coil 92 inserted in the slot 95 from coming out of the opening 95a of the slot 95 to the inner periphery of the stator core 91. Although not shown, when the coil 92 and wedge 94 are inserted in the slot 95 of the stator core 91, a part of the coil 92 protrudes from the end faces 91a and 91b of the stator core 91.

Insulating paper may be positioned within the slot. A portion of the insulating paper is positioned along the inner surface of the slot, and a portion of the insulating paper protrudes from the end face of the stator core. The insulating paper covers the base end portion of the coil protruding from the stator core. The insulating paper can prevent the base end portion of the coil from contacting the end face of the stator core.

(Configuration of coil insertion device)
Next, the configuration of the coil insertion device 1 according to this embodiment will be described in detail with reference to Fig. 1 and Fig. 5 to Fig. 12. As shown in Fig. 1, the coil insertion device 1 has a device main body 2, a stator core transport unit 3, a stator core supply unit 5, and a coil insertion unit 6.

The device body 2 is supported on the installation surface on which the coil insertion device 1 is installed. The device body 2 supports the stator core transport unit 3 via the support unit 41, which will be described later.

(Stator core transport section)
The stator core transport unit 3 has a transport table 31, a support unit 41, a stator core holding unit 42, and a drive unit 43. The stator core transport unit 3 transports the multiple stator cores 91 placed on the transport table 31 one by one to the coil insertion position P1.

The coil insertion position P1 is the position where the coil insertion section 6 inserts the coil into the slot 95 of the stator core 91. In this embodiment, the stator core transport section 3 transports the stator core 91 toward a position where it overlaps in the axial direction with the coil insertion section 6 located at the coil insertion position P1.

As shown in Figures 1, 5, and 6, the conveying table 31 has a conveying table main body 32, a mounting portion 33, and a coil insertion positioning portion 35.

As shown in Figures 5 and 6, the transport table body 32 is plate-shaped. In this embodiment, the transport table body 32 is rectangular and long in one direction when viewed from the thickness direction of the transport table body 32. A plurality of mounting sections 33 are located on the upper surface of the transport table body 32. The transport table body 32 has a plurality of through holes 32a that penetrate in the thickness direction.

The transport table body 32 is supported by the support portion 41. While supported by the support portion 41, the transport table body 32 can move in the longitudinal direction of the transport table body 32 relative to the device body portion 2. The outline arrows in each figure indicate the direction of movement of the transport table body 32.

The multiple placement sections 33 are plate-shaped. Each of the multiple placement sections 33 is located on the transport table main body 32. The placement sections 33 have a through hole 33a that penetrates in the thickness direction. The through hole 33a of the placement section 33 is located at a position that overlaps with the through hole 32a of the transport table main body 32 when viewed from the thickness direction.

The stator core 91 is placed on the placement portion 33. When the stator core 91 is placed on the placement portion 33, the through hole that passes through the center of the stator core 91 overlaps with the through hole 32a of the conveyor body 32 and the through hole 33a of the placement portion 33 when viewed from the thickness direction.

As shown in Figs. 1 and 6, in this embodiment, the multiple placement sections 33 are positioned in one direction on the conveying table 31. Each of the multiple placement sections 33 can accommodate one stator core 91. The stator core 91 placed on the placement section 33 is positioned at a predetermined position on the placement section 33. Note that, in this embodiment, the conveying table 31 has two placement sections 33, but the conveying table may have three or more placement sections.

The coil insertion positioning section 35 is located on the underside of the conveying table main body 32. More specifically, the coil insertion positioning section 35 is located on the underside of the conveying table main body 32, on the outer periphery of the through hole 32a that penetrates the conveying table main body 32. The coil insertion positioning section 35 positions the coil insertion section 6, which will be described later, at a predetermined position on the underside of the conveying table main body 32. Note that the conveying table does not have to have a coil insertion positioning section.

As shown in Figures 1 and 6, the support part 41 is connected to the conveying table main body 32. In detail, the support part 41 supports the conveying table main body 32 near the coil insertion position P1 when viewed from the thickness direction of the conveying table main body 32.

The support section 41 supports the transport platform main body 32 so that it can move relative to the device main body section 2. That is, the transport platform main body 32 can move relative to the device main body section 2 while being supported by the support section 41. As the transport platform main body 32 moves, the multiple placement sections 33 placed on the transport platform main body 32 move closer to or farther away from the position to which the support section 41 is connected.

In this embodiment, the support portion 41 includes a plurality of columnar members 44. The upper ends of the plurality of columnar members 44 are connected to the device main body portion 2. The lower ends of the plurality of columnar members 44 are connected to the conveying table main body 32. When viewed from the thickness direction, the plurality of columnar members 44 are positioned at a predetermined interval on the outer periphery side of the mounting portion 33 positioned at the coil insertion position P1.

The support rigidity of the conveyor body 32 is high at the portion supported by the support portion 41. In other words, the placement portion 33 located near the coil insertion position P1 is supported by the support portion 41 with high support rigidity and is not easily displaced in the axial direction.

The multiple columnar members 44 have a vertical movement mechanism that drives the conveyor table 31 up and down. The vertical movement mechanism is similar to a general vertical movement mechanism, so a description thereof is omitted. When the conveyor table 31 moves downward, the coil 92 is inserted into the stator core 91 placed on the placement section 33.

The stator core holding portion 42 is plate-shaped. The stator core holding portion 42 is located above the stator core 91 placed on the placement portion 33. The stator core holding portion 42 has a through hole 42a that penetrates in the thickness direction. The through hole 42a is located at a position that overlaps with the through hole 32a of the conveyor body 32 when viewed from the thickness direction.

The stator core holding part 42 is supported by the device main body 2 via a support part 45 connected to the upper side. The support part 45 has a vertical movement mechanism that drives the stator core holding part 42 up and down. The vertical movement mechanism is similar to a general vertical movement mechanism, so a description of it will be omitted.

By moving downward, the stator core holding portion 42 comes into contact with the upper end face 91b of the stator core 91 placed on the mounting portion 33. The stator core holding portion 42 restricts the stator core 91 placed on the mounting portion 33 from moving upward.

The drive unit 43 moves the conveying table 31 in the direction in which the multiple mounting sections 33 are arranged. By moving the conveying table 31, the drive unit 43 positions one of the mounting sections 33 placed on the conveying table main body 32 at the coil insertion position P1.

In this embodiment, the drive unit 43 alternately positions the two placement units 33 at the coil insertion position P1. Specifically, the drive unit 43 moves the conveyance table 31 to one side of the arrangement direction, thereby positioning the placement unit 33 located at the other side of the arrangement direction of the two placement units 33 at the coil insertion position P1. The drive unit 43 moves the conveyance table 31 to the other side of the arrangement direction, thereby positioning the placement unit 33 located at one side of the arrangement direction of the two placement units 33 at the coil insertion position P1. Note that when one placement unit 33 is positioned at the coil insertion position P1, the other placement unit 33 is positioned at another position. Hereinafter, when one placement unit 33 is positioned at the coil insertion position P1, the position at which the other placement unit 33 is positioned is referred to as the standby position P2.

In this way, the drive unit 43 moves the conveying table 31 back and forth in a straight line, thereby moving the multiple placement units 33 between the coil insertion position P1 and the standby position P2. Therefore, the mechanism for moving the conveying table 31 by the drive unit 43 can be realized with a simple configuration. In addition, because the conveying table 31 moves in a straight line, the space in which the conveying table 31 moves can be reduced. This makes it possible to realize a stator core conveying unit 3 with a compact and simple configuration.

In this embodiment, the support portion 41 supports the conveying table 31 by a plurality of columnar members 44 that are positioned at a predetermined interval on the outer periphery of the mounting portion 33 positioned at the coil insertion position P1 when viewed from the thickness direction. However, the support portion does not have to be positioned at a predetermined interval on the outer periphery of the mounting portion positioned at the coil insertion position. The support portion may be configured to support the conveying table at a position closer to the coil insertion position than the midpoint between the coil insertion position and the standby position. For example, one support portion may be configured to support the conveying table near the coil insertion position.

That is, in the stator core transport section 3, the transport table 31 on which the stator core 91 is placed is supported by the support section 41 near the coil insertion position P1. Therefore, the support rigidity of the transport table 31 is high in a position close to the coil insertion position P1. Therefore, when the coil insertion section 6 inserts the coil 92 into the slot 95 of the stator core 91 on the mounting section 33 positioned at the coil insertion position P1, the stator core 91 can be prevented from being displaced relative to the coil insertion section 6. This makes it possible to prevent the inner surface of the slot 95 from being scratched when the coil 92 is inserted into the slot 95.

In this embodiment, the coil insertion section 6 is located on the opposite side of the conveyor table 31 from the surface on which the mounting section 33 is located. The conveyor table 31 has a coil insertion positioning section 35 on the surface on the opposite side from the surface on which the mounting section 33 is located, for determining the position of the coil insertion section 6 with respect to the stator core 91 on the mounting section 33.

This allows the coil insertion portion 6 to be easily positioned relative to the stator core 91 on the mounting portion 33, which is positioned at the coil insertion position P1. This makes it possible to more reliably prevent damage to the inner surfaces of the slots 95 when inserting the coils 92 into the multiple slots 95 of the stator core 91.

In this embodiment, the coil insertion section 6 is located on the opposite side of the conveying table 31 from the surface on which the placement section 33 is located. The stator core conveying section 3 has a stator core pressing section 42 that presses the end face 91b of the stator core 91 located on the opposite side to the insertion side of the coil 92 in the stator core 91 placed on the placement section 33, relative to the placement section 33 positioned at the coil insertion position P1.

This allows the stator core pressing portion 42 to press the end face 91b opposite to the end face 91a on the side where the coil 92 is inserted into the stator core 91. Therefore, when inserting the coil 92 into the multiple slots 95 of the stator core 91, the stator core 91 can be prevented from moving in the insertion direction of the coil 92. This makes it possible to more reliably prevent the inner surface of the slot 95 from being scratched when inserting the coil 92 into the slot 95.

(Stator Core Supply Department)
1, the stator core supply unit 5 supplies a stator core 91 to the stator core transport unit 3. Specifically, the stator core supply unit 5 supplies the stator core 91, into which the coil 92 has not yet been inserted, to the placement unit 33 positioned at the standby position P2.

In this way, the coil insertion device 1 has a stator core supply unit 5 that supplies the stator core 91 to the placement unit 33 positioned at the standby position P2.

The stator core supply unit 5 supplies the stator core 91 to the placement unit 33 positioned at the standby position P2 while the coil 92 is being inserted into the slot 95 of the stator core 91 transported to the coil insertion position P1. This improves the productivity of the stator.

(Coil insertion part)
1 , the coil insertion unit 6 inserts the coil 92 into the slot 95 of the stator core 91 that has been transported to the coil insertion position P1. In this embodiment, the coil insertion unit 6 has a coil holding unit 61 and a wedge holding unit 62. The coil insertion unit 6 inserts the coil 92 into the slot 95 of the stator core 91 by moving the coil 92 held by the coil holding unit 61 in the axial direction of the stator core 91 using a coil moving unit (not shown).

The coil holding portion 61 is cylindrical. The coil holding portion 61 holds the coil 92 to be inserted into the slot 95 of the stator core 91.

The wedge holding portion 62 is cylindrical. The wedge holding portion 62 holds the wedge 94 to be inserted into the slot 95 of the stator core 91. The wedge holding portion 62 is located on one side of the coil holding portion 61 in the axial direction. More specifically, the wedge holding portion 62 is connected to the rear of the direction in which the coil insertion portion 6 moves when inserting the coil 92 into the slot 95 of the stator core 91. The wedge holding portion 62 has multiple wedge holding spaces extending in the axial direction inside. When viewed from the axial direction, the wedge holding spaces overlap with the positions where the wedges 94 are inserted into the slots 95 of the stator core 91. The wedge holding portion 62 holds the wedges 94 in each of the multiple wedge holding spaces.

The coil insertion section 6 is positioned at the coil insertion position P1 while holding the coil 92 and wedge 94. The stator core transport section 3 transports the stator core 91 above the coil insertion section 6 positioned at the coil insertion position P1, and moves the stator core 91 axially toward the coil insertion section 6. The coil insertion section 6 moves the coil 92 and wedge 94 relative to the stator core 91 from the end face 91a side toward the end face 91b side of the stator core 91. This causes the coil 92 and wedge 94 to be inserted into the slot 95 of the stator core 91.

That is, while holding the coil 92 and the wedge 94, the coil insertion section 6 moves axially relative to the stator core 91 positioned at the coil insertion position P1, thereby inserting the coil 92 and the wedge 94 into the multiple slots 95 of the stator core 91.

In this way, the coil insertion unit 6 can insert the coils 92 and wedges 94 into the multiple slots 95 of the stator core 91 at the coil insertion position P1. This improves work efficiency compared to a configuration in which the device for inserting the coils and the device for inserting the wedges are different.

In addition, in the above-mentioned configuration, the stator core 91 into which the coil 92 is inserted is placed on the placement section 33, which is positioned on the conveyor table 31 at a position with high support rigidity. In other words, the stator core 91 is prevented from being displaced in the direction of movement of the coil insertion section 6. Therefore, when the coil 92 is inserted into the multiple slots 95 of the stator core 91 by the coil insertion section 6, it is possible to prevent the inner surface of the slots 95 from being scratched and the wedges 94 from being damaged.

(Coil insertion method)
Next, a method of inserting the coils 92 and wedges 94 into the slots 95 of the multiple stator cores 91 using the coil insertion device 1 will be described with reference to FIGS.

As shown in FIG. 7, when the stator core 91 is not placed on the placement section 33B positioned at the standby position P2, the stator core supply section 5 supplies the stator core 91 to the placement section 33B. As shown in FIG. 8, when the stator core 91 is placed on the placement section 33B, the drive section 43 moves the conveyor table 31 in the horizontal direction. As a result, as shown in FIG. 9, the placement section 33B is positioned above the coil insertion position P1 where the coil insertion section 6 is located.

Next, as shown in FIG. 10, the stator core pressing part 42 is moved downward by a vertical movement mechanism (not shown) of the support part 45, and presses the upper end face 91b of the stator core 91. Furthermore, the conveying platform 31 is moved downward by a vertical movement mechanism (not shown) of the multiple columnar members 44. After that, the coil insertion part 6 moves the coil and wedge 94 axially relative to the stator core 91. As a result, the coil 92 and wedge 94 are inserted into the slot 95 of the stator core 91.

While the coil 92 and wedge 94 are being inserted into the slot 95 of the stator core 91, the stator core supply unit 5 supplies the stator core 91 into which the next coil 92 will be inserted to the placement unit 33A, which is positioned at the standby position P2.

When the insertion of the coil 92 and wedge 94 into the slot 95 of the stator core 91 is completed, the stator core holding unit 42 and the conveying table 31 move upward as shown in FIG. 11. Furthermore, the driving unit 43 moves the conveying table 31 in the horizontal direction. While the conveying table 31 is moving, the coil insertion device 1 positions the coil insertion unit 6, which holds the coil 92 and wedge 94, at the coil insertion position P1.

As shown in FIG. 12, the drive unit 43 moves the conveyor table 31 in the horizontal direction, so that the placement unit 33A is positioned above the coil insertion position P1.

Then, the same process is performed on the stator core 91 placed on the placement section 33A. That is, the stator core holding section 42 and the conveying table 31 are moved downward. As a result, the coils 92 and wedges 94 are inserted into the slots 95 of the stator core 91.

While the coil 92 and wedge 94 are being inserted into the slot 95 of the stator core 91, the stator core 91 with the coil 92 inserted therein is removed from the mounting portion 33B. The stator core supplying portion 5 supplies the stator core 91 into which the coil 92 will be inserted next to the mounting portion 33B, which is positioned at the standby position P2.

By repeating the above steps, coils 92 and wedges 94 can be supplied sequentially to multiple stator cores 91.

The coil insertion device 1 according to the present embodiment having the above configuration includes a device main body 2, a stator core transport unit 3 supported by the device main body 2 and transporting multiple stator cores 91 to a coil insertion position P1 where coils 92 are inserted into multiple slots 95 of the stator core 91, and a coil insertion unit 6 that inserts the coils 92 into the multiple slots 95 of the stator core 91 by moving the coils 92 from one side to the other side of the axial direction of the stator core 91 for the stator core 91 transported to the coil insertion position P1. The stator core transport unit 3 includes a transport table 31 having multiple placement units 33 on which the stator cores 91 are placed, a support unit 41 that supports the transport table 31 movably relative to the device main body 2, and a drive unit 43 that moves the transport table 31 relative to the support unit 41 to position one of the multiple placement units 33 at the coil insertion position P1 and position the remaining placement units 33 at the standby position P2. The support part 41 supports the transport table 31 at a position closer to the coil insertion position P1 than the standby position P2.

In the above-described configuration, the conveying table 31 having the placement portion 33 on which the stator core 91 is placed is supported by the support portion 41 at a position closer to the coil insertion position P1 where the coil 92 is inserted than the standby position P2 with respect to the device main body 2. Therefore, the support rigidity of the conveying table 31 is higher at a position closer to the coil insertion position P1 than at a position closer to the standby position P2. Therefore, when the coil insertion portion 6 inserts the coil 92 into the slot 95 of the stator core 91 on the placement portion 33 positioned at the coil insertion position P1, the stator core 91 can be prevented from being displaced relative to the coil insertion portion 6. This makes it possible to prevent the inner surface of the slot 95 from being scratched when the coil 92 is inserted into the slot 95 of the stator core 91.

In addition, while the coil 92 is being inserted into the stator core 91 on the mounting part 33 positioned at the coil insertion position P1, the next stator core into which the coil 92 is to be inserted can be set on the mounting part 33 positioned at the standby position P2. This makes it possible to shorten the work time required to insert the coil 92 into the stator core 91, thereby improving work efficiency. Therefore, it is possible to provide a coil insertion device 1 that can improve the productivity of stators.

In this embodiment, the support portion 41 includes a plurality of columnar members 44 that are positioned at a predetermined interval on the outer periphery side of the placement portion 33 that is positioned at the coil insertion position P1 when viewed from the thickness direction of the transport table 31. One end of each of the columnar members 44 is connected to the device main body portion 2, and the other end is connected to the transport table 31.

In the above-described configuration, the outer periphery of the mounting portion 33 positioned at the coil insertion position P1 on the conveying table 31 is supported by a plurality of columnar members 44. This makes it possible to more reliably improve the support rigidity of the portion of the conveying table 31 positioned at the coil insertion position P1. Therefore, when inserting the coil 92 into the slot 95 of the stator core 91, it is possible to more reliably prevent the inner surface of the slot 95 from being damaged.

(Embodiment 2)
Next, a coil insertion device 101 according to a second exemplary embodiment of the present invention will be described with reference to Fig. 13 and Fig. 14. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 13, the coil insertion device 101 has a device main body 102, a stator core transport unit 3, a stator core supply unit 5, a coil insertion unit 106, and a coil insertion transport unit 107.

(Device body)
In the present embodiment, the device body 102 has a positioning stand 121. The device body 102 supports the stator core transport unit 3 via a support portion 41, similar to the first embodiment.

The positioning table 121 is a plate extending horizontally. The positioning table 121 is located below the stator core transport section 3. The positioning table 121 is supported by a support pillar on the device main body section 102. The positioning table 121 has a first positioning section 123 on the mounting surface 122, which is the upper surface. The coil insertion section 106 can be mounted on the positioning table 121.

The first positioning portion 123 is used to position the coil insertion portion 106 when inserting the coil 92 into the slot 95 of the stator core 91.

In this embodiment, the first positioning portion 123 is located near the coil insertion position P1 on the mounting surface 122 when viewed from the axial direction. The first positioning portion 123 includes, for example, a convex portion that protrudes in the axial direction. The first positioning portion 123 positions the coil insertion portion 106 at the coil insertion position P1.

(Coil insertion part)
The coil insertion portion 106 has a coil holding portion 61 and a wedge holding portion 162 .

The wedge holding portion 162 is connected to the rear of the coil insertion portion 106 in the direction of movement, as in the first embodiment. The wedge holding portion 162 holds the wedge 94.

In this embodiment, the wedge holding portion 162 has a positioned portion 163 at its rear end for being positioned by the first positioning portion 123. The positioned portion 163 includes, for example, a recess that is recessed in the axial direction. The protrusion of the first positioning portion 123 of the positioning table 121 is inserted into the recess of the positioned portion 163 of the coil insertion portion 106, so that the coil insertion portion 106 is positioned on the positioning table 121 in the horizontal, circumferential and axial directions.

(Coil insertion transport section)
The coil insertion transport part 107 is in the shape of a plate extending in the horizontal direction. The coil insertion transport part 107 holds the coil insertion part 106. The coil insertion transport part 107 has a through hole 107a penetrating in the thickness direction.

The coil insertion section 106 is held by the coil insertion transport section 107 while passing through the through hole 107a. In other words, while being held by the coil insertion transport section 107, the rear end of the wedge holding section 162 protrudes downward from the coil insertion transport section 107.

The coil insertion transport unit 107 can move while holding the coil insertion unit 106. For example, the coil insertion transport unit 107 is moved by a drive mechanism (not shown). When inserting the coil 92 into the slot 95 of the stator core 91, the coil insertion transport unit 107 transports the coil insertion unit 106 to a position on the mounting surface 122 where it is positioned by the first positioning unit 123.

That is, the coil insertion device 101 according to this embodiment further includes a coil insertion transport unit 107 that transports the coil insertion unit 106. The device main body 102 includes a positioning table 121 having a mounting surface 122 on which the coil insertion unit 106 can be placed. The positioning table 121 includes a first positioning unit 123 that positions the coil insertion unit 106 at a position on the mounting surface 122 that overlaps with the coil insertion position P1 when viewed from the axial direction. When the coil insertion unit 106 inserts the coils 92 into the multiple slots 95 of the stator core 91, the coil insertion transport unit 107 transports the coil insertion unit 106 to a position on the mounting surface 122 where it is positioned by the first positioning unit 123.

Figure 14 shows how the coil 92 and wedge 94 are inserted into the slot 95 of the stator core 91 by the coil insertion device 101. In this embodiment, the first positioning unit 123 positions the coil insertion unit 106 at the coil insertion position P1 when the coil is inserted. This prevents the movement direction of the coil insertion unit 106 from being displaced relative to the axial direction of the stator core 91 when the coil insertion unit 106 moves axially relative to the stator core 91.

In addition, the position of the slot 95 of the stator core 91 can be easily aligned with the position of the coil 92 and wedge 94 held by the coil insertion portion 106 when viewed from the axial direction. Therefore, when inserting the coil 92 into the slot 95, the coil 92 can be reliably prevented from contacting the inner surface of the slot. This makes it possible to easily and more reliably prevent the inner surface of the slot 95 from being scratched. Therefore, it is possible to provide a coil insertion device 101 that can improve the productivity of stators.

(Embodiment 3)
Next, a coil insertion device 201 according to a third exemplary embodiment of the present invention will be described with reference to Fig. 15 to Fig. 22. In the following, the same components as those in the first and second embodiments are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 15, the coil insertion device 201 has a device main body 202, a stator core transport unit 3, a stator core supply unit 5, a coil insertion unit 206, a coil insertion transport unit 207, and a wedge supply unit 208.

(Device body)
In this embodiment, the device body 202 has a positioning table 221. The device body 202 supports the stator core transport unit 3 via a support portion 41, similar to the first embodiment.

The positioning table 221 is located below the stator core transport unit 3. The positioning table 221 is a plate extending horizontally. As shown in FIG. 16, the positioning table 221 in this embodiment extends in a direction intersecting the direction in which the transport table 31 of the stator core transport unit 3 moves. FIG. 16 is a view of the coil insertion device 201 as viewed from the direction of arrow A in FIG. 15.

The positioning table 221 is supported on the device body 202 by a support. The positioning table 221 has a first positioning portion 223 and a second positioning portion 224 on the upper surface, i.e., the mounting surface 222. The wedge supply unit 208 is supported on the lower surface of the positioning table 221.

As shown in FIG. 17, the positioning table 221 has a through hole 221a through which the wedge 94 can pass. As will be described in detail later, the through hole 221a allows the wedge 94 held by the wedge supply unit 208 supported on the underside of the positioning table 221 to be removed above the positioning table 221.

The first positioning portion 223 is located on the mounting surface 222 at a position that overlaps with the coil insertion position P1 when the positioning table 221 is viewed from the thickness direction. The configuration and function of the first positioning portion 223 are similar to the configuration and function of the first positioning portion 123 of the second embodiment.

In this embodiment, the second positioning portion 224 is located on the mounting surface 222 at a position different from the first positioning portion 223. The second positioning portion 224 positions the coil insertion portion 206 at a position where the wedge 94 is supplied to the coil insertion portion 206 from the wedge supply portion 208. The configuration and function of the second positioning portion 224 are similar to the configuration and function of the first positioning portion 123 of the second embodiment.

The coil insertion section 206 is positioned in the first positioning section 223 when the coil 92 is inserted into the slot 95 of the stator core 91. The coil insertion section 206 is positioned in the second positioning section 224 when the wedge 94 is supplied to the coil insertion section 206 from the wedge supply section 208.

(Coil insertion part)
The coil insertion portion 206 has a coil holding portion 61 and a wedge holding portion 262 .

The wedge holding portion 262 is connected to the rear of the coil insertion portion 206 in the direction of movement, as in the first embodiment. The wedge holding portion 262 holds the wedge 94.

In this embodiment, the wedge holding portion 262 has a positioned portion 263 at its rear end. The positioned portion 263 positions the coil insertion portion 206 at a position on the mounting surface 222 that overlaps with the coil insertion position P1 when viewed from the axial direction. The coil insertion portion 206 is positioned at a position on the mounting surface 222 that overlaps with the wedge supply portion 208 when viewed from the axial direction.

As shown in FIG. 17, in this embodiment, the wedge holding portion 262 has an insertion hole 264 in the rear end surface into which the wedge 94 is inserted. The insertion hole 264 allows the wedge 94 supplied from the wedge supply portion 208 to pass through.

When viewed from the axial direction, the insertion hole 264 is located at a position overlapping the through hole 221a of the positioning table 221 when the coil insertion portion 206 is positioned on the mounting surface 222 by the second positioning portion 224. Therefore, when the coil insertion portion 206 is positioned on the mounting surface 222 by the second positioning portion 224, the wedge supply portion 208 can supply the wedge 94 to the wedge holding portion 262.

(Wedge supply section)
The wedge supply unit 208 has a cylindrical shape. As shown in Fig. 15 to Fig. 17 , the wedge supply unit 208 is located below the positioning table 221. The wedge supply unit 208 holds a wedge 94. The wedge supply unit 208 supplies the held wedge 94 to the coil insertion unit 206.

More specifically, as shown in FIG. 17, above the wedge supply unit 208, a positioning table 221 having a through hole 221a through which the wedge 94 can pass is positioned. A coil insertion unit 206 having an insertion hole 264 into which the wedge 94 is inserted is positioned at a position overlapping with the wedge supply unit 208 when viewed from the axial direction. With the coil insertion unit 206 positioned on the positioning table 221, the wedge supply unit 208 pushes the held wedge 94 into the insertion hole 264 of the coil insertion unit 206 through the through hole 221a of the positioning table 221 by an extrusion unit (not shown). This allows the wedge supply unit 208 to supply the wedge 94 to the wedge holding unit 262 of the coil insertion unit 206.

(Coil insertion transport section)
As shown in FIGS. 15 and 16 , the coil insertion transport unit 207 has a coil transport main body 271 and a rotating shaft 272 .

The coil transport body 271 is a plate extending horizontally. When viewed from the thickness direction, the coil transport body 271 is rectangular and long in one direction. A rotating shaft 272 is connected to the center of the coil transport body 271 when viewed from the thickness direction. Therefore, the coil transport body 271 can rotate around the center. In addition, the coil transport body 271 can move up and down.

The rotating shaft 272 is a rotating shaft that extends in the vertical direction. The rotating shaft 272 supports the coil transport body 271 so that it can rotate relative to the positioning table 221. In other words, while being supported by the rotating shaft 272, the coil transport body 271 can rotate relative to the positioning table 221.

The axis of rotation of the rotating shaft 272 passes through the midpoint between the center of the wedge supply unit 208 and the coil insertion position P1 when viewed from the thickness direction of the positioning table 221. In other words, when viewed from the thickness direction, the center of the wedge supply unit 208 and the coil insertion position P1 are located rotationally symmetrically about the axis of rotation.

In this embodiment, the coil transport body 271 has two through holes 207a that penetrate in the thickness direction. The coil transport body 271 can hold the coil insertion section 206 in each through hole 207a. The two through holes 207a are positioned rotationally symmetrically around the rotation axis.

As described above, the center of the wedge supply unit 208 and the coil insertion position P1 are located in rotational symmetry around the rotation axis. The two through holes 207a are located in rotational symmetry around the rotation axis of the rotation shaft 272. Therefore, the coil transport body 271 moves the coil insertion unit 206 held in the through hole 207a to a position overlapping with the wedge supply unit 208 and a position overlapping with the coil insertion position P1 when viewed from the thickness direction.

Therefore, when the coil insertion unit 206 inserts the coil into the slot 95 of the stator core 91, the coil insertion transport unit 207 can transport the coil insertion unit 206 to a position on the mounting surface 222 where it is positioned by the first positioning unit 223. Also, when the wedge supply unit 208 supplies the wedge 94 to the coil insertion unit 206, the coil insertion transport unit 207 can transport the coil insertion unit 206 to a position on the mounting surface 222 where it is positioned by the second positioning unit 224.

With reference to Figures 18 to 22, a method for inserting coils 92 and wedges 94 into slots 95 of a stator core 91 using the coil insertion device 201 of this embodiment will be described.

First, the coil insertion section 206 is inserted into the through hole 207a of the coil insertion transport section 207 with the coil 92 wound in a ring shape by a coil winding device (not shown) being supplied to it. The coil insertion transport section 207 transports the coil insertion section 206 to a position on the mounting surface 222 where it is positioned by the second positioning section 224. Specifically, the coil insertion transport section 207 transports the coil insertion section 206 above the wedge supply section 208. Thereafter, as shown in FIG. 18, the coil insertion transport section 207 moves downward to position the coil insertion section 206 at the second positioning section 224.

When the coil insertion portion 206 is positioned in the second positioning portion 224, the insertion hole 264 of the wedge holding portion 262 and the through hole 221a of the positioning table 221 overlap when viewed from the axial direction. In this state, as shown in FIG. 19, the wedge supply portion 208 supplies the wedge 94 to be held to the wedge holding portion 262.

Next, as shown in FIG. 20, the coil insertion transport unit 207 moves upward. After that, as shown in FIG. 21, the coil insertion transport unit 207 rotates to transport the coil insertion unit 206 it holds to a position on the mounting surface 222 where it is positioned by the first positioning unit 223.

Next, as shown in FIG. 22, the coil insertion transport unit 207 moves downward. This positions the coil insertion unit 206 at the coil insertion position P1.

Then, the conveying table 31 of the stator core conveying unit 3 moves downward, and the coil 92 and wedge 94 are inserted into the slot 95 of the stator core 91.

While the coil 92 and wedge 94 are being inserted into the slot 95 of the stator core 91, the wedge 94 is supplied to the wedge supply section 208 below the positioning table 221. Then, another coil insertion section is set above the wedge supply section 208. This allows the wedge 94 to be supplied to the other coil insertion section 206 while the coil 92 is being inserted into the slot 95 of the stator core 91 at the coil insertion position P1.

As described above, the coil insertion device 201 according to this embodiment further includes a wedge supply unit 208 that supplies a wedge 94 to the coil insertion unit 206. The coil insertion unit 206 includes a coil holding unit 61 that holds the coil 92, and a wedge holding unit 262 that is located on one side of the axial direction from the coil holding unit 61 and holds the wedge 94. The wedge holding unit 262 has an insertion hole 264 into which the wedge 94 is inserted. The wedge supply unit 208 is located below the positioning table 221. The positioning table 221 has a through hole 221a through which the wedge 94 supplied from the wedge supply unit 208 can pass, and a second positioning unit 224. The second positioning unit 224 positions the coil insertion unit 206 on the mounting surface 222 and at a position where the insertion hole 264 of the wedge holding unit 262 overlaps with the through hole 221a when the positioning table 221 is viewed from the axial direction. When the wedge supply unit 208 supplies the wedge 94 to the coil insertion unit 206, the coil insertion transport unit 207 transports the coil insertion unit 206 to a position on the mounting surface 222 where it is positioned by the second positioning unit 224.

The coil insertion section 206 supported by the coil insertion transport section 207 is positioned relative to the device body section 202 by the second positioning section 224 above the wedge supply section 208, which supplies wedges 94 to the coil insertion section 206. This prevents the coil insertion section 206 from being displaced relative to the wedge supply section 208 when the wedge supply section 208 supplies wedges 94 to the coil insertion section 206. Therefore, the wedges 94 can be supplied to the coil insertion section 206 with high accuracy.

In addition, in this embodiment, when the coil insertion unit 206 inserts the coil 92 into the slot 95 of the stator core 91, the coil insertion transport unit 207 transports the coil insertion unit 206 to a position on the mounting surface 222 where it is positioned by the first positioning unit 223.

The coil insertion portion 206 is positioned at the coil insertion position P1 by the first positioning portion 223. This prevents the direction of movement of the coil insertion portion 206 from being displaced relative to the axial direction of the stator core 91 when the coil insertion portion 206 moves axially relative to the stator core 91. In addition, the positions of the coil 92 and wedge 94 held by the coil insertion portion 206 can be easily overlapped with the positions of the slots 95 of the stator core 91 when viewed from the above direction. Therefore, it is possible to easily and more reliably prevent the inner surface of the slot 95 from being scratched when the coil 92 is inserted into the slot 95.

In addition, in this embodiment, the second positioning portion 224 positions the coil insertion portion 206 at a position on the mounting surface 222 that does not overlap with the coil insertion position P1 when viewed from the axial direction.

As a result, while the coil 92 is being inserted into the slot 95 of the stator core 91 at the coil insertion position P1, the wedge 94 can be supplied to the other coil insertion section 206. Therefore, the work time required to insert the coil 92 into the stator core 91 can be shortened, and work efficiency can be improved. Thus, it is possible to provide a coil insertion device 201 that can improve the productivity of stators.

Other Embodiments
Although the embodiment of the present invention has been described above, the above-mentioned embodiment is merely an example for carrying out the present invention. Therefore, the present invention is not limited to the above-mentioned embodiment, and it is possible to carry out the above-mentioned embodiment by appropriately modifying it within the scope of the gist of the present invention.

In each of the above embodiments, in the coil insertion device 1, 101, 201, the coil 92 and wedge 94 are inserted into the slot 95 of the stator core 91 by moving the conveying table 31 toward the coil insertion section 6, 106, 206 located below the conveying table 31. However, the coil insertion device may be configured such that the coil and wedge are inserted into the slot of the stator core by moving the conveying table toward the coil insertion section located above.

In each of the above embodiments, the stator core 91 moves toward the coil insertion portion 6, 106, or 206. However, the coil insertion portion may move toward the stator core.

In each of the above embodiments, the transport table 31 has a rectangular shape that is long in one direction when viewed from the thickness direction of the transport table 31. Furthermore, the multiple placement sections 33 are positioned on the transport table 31 in a line in the one direction. However, the transport table may have other shapes when viewed from the thickness direction. For example, the transport table may be square, circular, or radial when viewed from the thickness direction. In this case, the multiple placement sections may be positioned on the transport table in a line in multiple rows or a circle when viewed from the thickness direction.

In each of the above embodiments, the drive unit 43 positions one of the multiple placement units 33 at the coil insertion position P1 by moving the conveying table 31 in one direction. However, as long as the support unit supports the conveying table at a position close to the coil insertion position and the drive unit positions one of the multiple placement units at the coil insertion position, the direction in which the drive unit moves the conveying table may be other than the one direction. For example, the drive unit may be configured to rotate and convey one of the multiple placement units close to the coil insertion position.

In each of the above embodiments, the coil insertion device 1, 101, 201 has a stator core supply unit 5. However, the coil insertion device does not have to have a stator core supply unit. The stator core may be supplied to the mounting unit by another method. For example, the stator core may be supplied to the mounting unit from a stator core manufacturing device that manufactures the stator core.

In each of the above embodiments, the coil insertion unit 6, 106, 206 of the coil insertion device 1, 101, 201 has a wedge holding unit 62, 162, 262, and moves axially relative to the stator core 91 while the wedge holding unit 62, 162, 262 holds the wedge 94. However, the coil insertion unit does not have to have a wedge holding unit. In this case, the coil insertion device may have a wedge supply unit that supplies the held wedge directly to the stator core, separate from the coil insertion unit. For example, the coil insertion device may have a wedge supply unit below the coil insertion position, and the wedge supply unit may supply the wedge directly to the stator core transported to the coil insertion position.

In the third embodiment, the positioning table 221 extends in a direction intersecting the direction in which the transport table 31 of the stator core transport unit 3 moves. However, the positioning table may extend in the direction in which the transport table 31 of the stator core transport unit 3 moves. Since the positioning table 221 extends in the intersecting direction, no part of the positioning table overlaps with the transport table when viewed from the thickness direction of the positioning table. Therefore, while the coil insertion unit is inserting a coil into the slot 95 of the stator core at coil insertion position P1, the next coil insertion unit can be easily prepared.

In the third embodiment, the wedge supply unit 208 is located below the second positioning unit 224. However, the wedge supply unit may be located below the first positioning unit. The wedge supply unit may be located below both the first positioning unit and the second positioning unit. The wedge supply unit may be located at a position other than below the second positioning unit.

In the third embodiment, the coil insertion transport unit 207 rotates and transports the coil insertion unit 206 to the coil insertion position P1. However, the coil insertion transport unit may be configured to move the coil insertion unit in one direction to transport it to the coil insertion position, similar to the stator core transport unit.

(Configuration example)
The present technology can also be configured as follows.

(1) The coil insertion device is a coil insertion device that inserts coils into multiple slots of a stator core. The coil insertion device has a device main body, a stator core transport unit that is supported by the device main body and transports multiple stator cores to a coil insertion position where coils are inserted into the multiple slots of the stator core, and a coil insertion unit that inserts the coils into the multiple slots of the stator core by moving the coils from one side to the other side of the axial direction of the stator core with respect to the stator core transported to the coil insertion position. The stator core transport unit has a transport table having multiple mounting parts on which the stator cores are respectively placed, a support unit that supports the transport table movably relative to the device main body, and a drive unit that moves the transport table relative to the support unit to position one of the multiple mounting parts at the coil insertion position and position the remaining mounting parts at a standby position. The support unit supports the transport table at a position closer to the coil insertion position than the standby position.

(2) In the coil insertion device described in (1), the multiple placement units are positioned in a line on the conveying table. The driving unit moves the conveying table in the line-up direction of the multiple placement units.

(3) The coil insertion device described in (1) or (2) further includes a stator core supply unit that supplies a stator core to the mounting unit positioned at the standby position.

(4) In the coil insertion device described in any one of (1) to (3), the coil insertion unit holds the coil and the wedge and moves axially relative to the stator core positioned at the coil insertion position to insert the coil and the wedge into multiple slots of the stator core.

(5) In the coil insertion device described in any one of (1) to (4), the support portion includes a plurality of columnar members positioned at a predetermined interval on the outer circumferential side of the placement portion positioned at the coil insertion position when viewed from the thickness direction of the conveying table. One end of each of the columnar members is connected to the device main body portion, and the other end is connected to the conveying table.

(6) In the coil insertion device described in any one of (1) to (5), the coil insertion section is located on the opposite side of the conveying table to the surface on which the placement section is located. The conveying table has a coil insertion positioning section on the surface opposite to the surface on which the placement section is located, for determining the position of the coil insertion section with respect to the stator core on the placement section.

(7) In the coil insertion device described in any one of (1) to (6), the coil insertion section is located on the opposite side of the conveying table to the surface on which the placement section is located. The stator core conveying section has a stator core pressing section that presses the end face of the stator core located on the opposite side to the coil insertion side of the stator core placed on the placement section, relative to the placement section positioned at the coil insertion position.

(8) The coil insertion device according to any one of (1) to (7), further comprising a coil insertion transport unit that transports the coil insertion unit. The device main body has a positioning table having a mounting surface on which the coil insertion unit can be placed. The positioning table has a first positioning unit that positions the coil insertion unit at a position on the mounting surface that overlaps with the coil insertion position when viewed from the axial direction. The coil insertion transport unit transports the coil insertion unit to a position on the mounting surface that is positioned by the first positioning unit when the coil insertion unit inserts the coil into the multiple slots of the stator core.

(9) The coil insertion device according to (8) further includes a wedge supply unit that supplies a wedge to the coil insertion unit. The coil insertion unit includes a coil holding unit that holds the coil, and a wedge holding unit that is located on one side of the coil holding unit in the axial direction and holds the wedge. The wedge holding unit has an insertion hole into which the wedge is inserted. The wedge supply unit is located below the positioning table. The positioning table has a through hole through which the wedge supplied from the wedge supply unit can pass, and a second positioning unit that positions the coil insertion unit on the placement surface at a position where the insertion hole of the wedge holding unit overlaps with the through hole when the positioning table is viewed from the axial direction. When the wedge supply unit supplies the wedge to the coil insertion unit, the coil insertion transport unit transports the coil insertion unit to a position on the placement surface to be positioned by the second positioning unit.

(10) In the coil insertion device described in (9), the second positioning unit positions the coil insertion unit at a position on the mounting surface that does not overlap with the coil insertion position when viewed from the axial direction.

The present invention can be used in a coil insertion device that inserts a coil into a stator core.

Reference Signs List 1, 101, 201 Coil insertion device 2, 102, 202 Device main body 3 Stator core transport section 5 Stator core supply section 6, 106, 206 Coil insertion section 31 Transport table 32 Transport table main body 32a Through hole 33, 33A, 33B Placement section 33a Through hole 35 Coil insertion positioning section 41, 45 Support section 42 Stator core pressing section 42a Through hole 43 Drive section 44 Columnar member 61 Coil holding section 62, 162, 262 Wedge holding section 91 Stator core 91a, 91b End surface 92 Coil 94 Wedge 95 Slot 95a Opening 107, 207 Coil insertion transport section 107a, 207a Through hole 121, 221 Positioning table 122, 222 Placement surface 123, 223 First positioning section 163, 263 Positioned portion 208 Wedge supply portion 221a Through hole 224 Second positioning portion 264 Insertion hole 271 Coil transport body 272 Rotation axis P1 Coil insertion position P2 Waiting position

Claims (10)

A coil insertion device that inserts coils into a plurality of slots of a stator core,
A device main body,
a stator core transport unit supported by the device body and configured to transport the stator cores to a coil insertion position where coils are inserted into the slots of the stator cores;
a coil insertion unit that inserts the coil into the plurality of slots of the stator core by moving the coil from one side to the other side in an axial direction of the stator core with respect to the stator core transported to the coil insertion position;
having
The stator core transport unit includes:
a conveyance table having a plurality of placement portions on which the stator cores are respectively placed;
a support section that supports the transport platform movably relative to the device body section;
a drive unit that moves the conveyance table relative to the support unit to position one of the plurality of placement units at the coil insertion position and position the remaining placement units at standby positions;
having
The support portion is
The conveyance table is supported at a position closer to the coil insertion position than the standby position.
Coil insertion device. 2. The coil insertion device according to claim 1,
The plurality of placement sections are positioned in a line on the conveying table in one direction,
The drive unit moves the transport table in an arrangement direction of the plurality of placement units.
Coil insertion device. 2. The coil insertion device according to claim 1,
The stator core supply unit further includes a stator core supply unit that supplies a stator core to the mounting unit located at the standby position.
Coil insertion device. 2. The coil insertion device according to claim 1,
The coil insertion portion includes:
while holding the coil and the wedge, moving the coil and the wedge in an axial direction relative to the stator core positioned at the coil insertion position, thereby inserting the coil and the wedge into the multiple slots of the stator core;
Coil insertion device. 2. The coil insertion device according to claim 1,
The support portion is
a plurality of columnar members positioned at a predetermined interval on an outer circumferential side of the placement portion positioned at the coil insertion position when viewed from a thickness direction of the conveyance table,
The columnar member is
One end is connected to the device main body, and the other end is connected to the conveying table.
Coil insertion device. 2. The coil insertion device according to claim 1,
The coil insertion portion includes:
a surface opposite to the surface on which the placement unit is located with respect to the conveying platform;
The conveying platform is
a coil insertion positioning portion for determining a position of the coil insertion portion with respect to the stator core on the mounting portion, on a surface opposite to a surface on which the mounting portion is located;
Coil insertion device. The coil insertion device according to any one of claims 1 to 6,
The coil insertion portion includes:
a surface opposite to the surface on which the placement unit is located with respect to the conveying platform;
The stator core transport unit includes:
a stator core pressing portion for pressing an end face of the stator core located on the opposite side to the coil insertion side of the stator core placed on the placing portion with respect to the coil insertion position;
Coil insertion device. 2. The coil insertion device according to claim 1,
The coil insertion unit further includes a coil insertion transport unit that transports the coil insertion unit,
The device main body includes:
a positioning table having a mounting surface on which the coil insertion part can be mounted,
The positioning table includes:
a first positioning portion for positioning the coil insertion portion at a position on the mounting surface that overlaps with the coil insertion position when viewed in the axial direction,
The coil insertion transport unit includes:
When the coil insertion unit inserts the coil into the plurality of slots of the stator core, the coil insertion unit is transported to a position on the placement surface where the coil insertion unit is positioned by the first positioning unit.
Coil insertion device. 9. The coil insertion device according to claim 8,
A wedge supply unit that supplies a wedge to the coil insertion unit,
The coil insertion portion includes:
A coil holding portion that holds the coil;
a wedge holding portion located on one side of the coil holding portion in the axial direction and holding the wedge;
having
the wedge holding portion has an insertion hole into which the wedge is inserted,
the wedge supply unit is located below the positioning table,
The positioning table includes:
a through hole through which the wedge supplied from the wedge supply unit can pass;
a second positioning portion that positions the coil insertion portion on the mounting surface at a position where the insertion hole of the wedge holding portion overlaps with the through hole when the positioning table is viewed in the axial direction;
having
The coil insertion transport unit includes:
When the wedge supply unit supplies the wedge to the coil insertion unit, the coil insertion unit is transported to a position on the placement surface where the coil insertion unit is positioned by the second positioning unit.
Coil insertion device. 10. The coil insertion device according to claim 9,
The second positioning portion is
The coil insertion portion is positioned on the mounting surface at a position that does not overlap with the coil insertion position when viewed in the axial direction.
Coil insertion device.

Images