CN210142970U

CN210142970U - Skew correction device for stator

Info

Publication number: CN210142970U
Application number: CN201921139160.9U
Authority: CN
Inventors: 安德瑞·彼丁
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2018-07-20
Filing date: 2019-07-19
Publication date: 2020-03-13
Anticipated expiration: 2029-07-19
Also published as: JP2020014365A

Abstract

The utility model provides a crooked orthotic devices of stator, it can shorten the time of setting up the operation cost and rectify stator crooked with small-size and simple structure. The skew correction device for the stator includes: a rotating body (40) which is rotatably attached around an axis (C2) and has a guide portion that is inclined from one side to the other side in the circumferential direction and from the inside to the outside in the radial direction; a first plate (10) which is disposed on a first side in the axial direction of the rotating body (40), has a long hole (15) extending in the radial direction, and has a stator core disposed thereon; a second plate (20) that is disposed on a second side of the rotating body (40) in the axial direction, that rotatably supports the rotating body (40), and that fixes the first plate (10); and a plurality of support columns (30) which are extended in the axial direction and arranged along the circumferential direction, have insertion sections (33) inserted into the through holes of the stator core, and slide sections sliding along the guide sections, and are inserted into the long holes (15) in a floating manner.

Description

Skew correction device for stator

Technical Field

The utility model relates to a crooked orthotic devices of stator.

Background

Previously, a rotating electrical machine such as an electric motor or a generator including a stator and a rotor has been known. The stator of the rotating electric machine is manufactured as follows.

First, a plurality of coils containing electrical conductors are fabricated. Next, the plurality of coils thus produced are arranged in a ring shape while being overlapped in the circumferential direction, and the tip end portions of the respective coils are inserted into the slits of the stator core. Then, the leading end portions of the coils that have protruded from the respective slits are twisted in the circumferential direction, thereby holding the coils to the stator. Thereafter, the leading end portions of the adjacent coils are joined to each other, thereby manufacturing a stator of the rotating electric machine. Various techniques have been proposed for correcting the skew of the stator core because the stator core is distorted when the coil is inserted and twisted.

For example, patent document 1 discloses an orthotic device including: a rotating mechanism mainly comprising a motor and a feed screw; the pressing mechanism mainly comprises a slide block, a cylinder and a piston; and a support member contacting the stator core from a radially outer side. According to the technique described in patent document 1, the correcting device presses the stator core from the radially outer side, whereby the distortion of the stator core in the circumferential direction can be corrected.

Further, patent document 2 discloses a structure of a pressing member including: the bolt is fastened in the fastening hole of the stator core, and the body part is formed into a shape matched with the projection part near the fastening hole of the stator core. According to the technique described in patent document 2, the pressing member is disposed so as to cover the upper side of the fastening hole of the stator core from the axial direction, and the bolt is fastened to the fastening hole, whereby the stator core can be fixed by the axial force of the bolt, and the distortion can be corrected.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2016-149854

[ patent document 2] Japanese patent laid-open No. 2017-169400

SUMMERY OF THE UTILITY MODEL

[ problem to be solved by the utility model ]

However, in the technique described in patent document 1, since the device is disposed radially outside the stator, the entire device is increased in size, and there is room for improvement in terms of simplification and downsizing of the device. In addition, in the technique described in patent document 2, it is necessary to fasten bolts to all the fastening holes of the stator core, and the number of steps of the installation work is large, and therefore, there is room for improvement in terms of shortening the work time.

Therefore, an object of the present invention is to provide a stator skew correction device that can correct stator skew by shortening the time required for installation work with a small and simple configuration.

[ means for solving problems ]

In order to solve the above problem, a skew correction device for a stator according to a utility model described in claim 1 (for example, the skew correction device 1 according to the first embodiment) includes: a rotating body (for example, the rotating body 40 in the first embodiment) which is attached so as to be rotatable around an axis (for example, the axis C2 in the first embodiment) and which has a guide portion (for example, the guide portion 42 in the first embodiment) which is inclined from one side to the other side in the circumferential direction and from the inside to the outside in the radial direction; a first plate (for example, a first plate 10 in the first embodiment) that is disposed on a first side in the axial direction of the rotating body, has a long hole (for example, a long hole 15 in the first embodiment) that extends in the radial direction, and is disposed with a stator core (for example, a stator core 5 in the first embodiment); a second plate (for example, a second plate 20 in the first embodiment) that is disposed on a second side in the axial direction of the rotating body, that rotatably supports the rotating body, and that fixes the first plate; and a plurality of support columns (for example, support columns 30 in the first embodiment) which are extended in the axial direction and arranged along the circumferential direction, each of which has an insertion portion (for example, insertion portion 33 in the first embodiment) into which a through-hole (for example, through-hole 50 in the first embodiment) of the stator core is inserted, and a sliding portion (for example, sliding portion 34 in the first embodiment) which slides along the guide portion, and which is inserted into the elongated hole with play.

In the device for correcting stator skew according to the present invention described in claim 2, the guide portion is formed in a spiral shape as viewed in the axial direction.

In the device for correcting skew of a stator according to the utility model defined in claim 3, the rotating body has a gear portion (for example, the gear portion 43 in the first embodiment) along the circumferential direction, and the second plate has a worm portion (for example, the worm portion 28 in the first embodiment) that meshes with the gear portion.

In the device for correcting skew of a stator according to the present invention described in claim 4, a hollow hole (for example, the first hollow hole 12 and the second hollow hole 22 in the first embodiment) that penetrates in the axial direction is formed in the first plate and the second plate in the radial center region.

In the device for correcting stator skew according to claim 5, the insertion portion has, at least in part, an inclined portion (for example, the inclined portion 35 in the first embodiment) that is inclined toward one side in the radial direction as it goes away from the first plate in the axial direction.

[ effects of the utility model ]

According to the skew correction device of stator described in claim 1, the rotator has the guide portion that inclines from one side of the circumferential direction toward the other side from the radial inside toward the outside, and the support column extends in the axial direction and has the sliding portion that slides along the guide portion, so that the rotator rotates with respect to the first plate and the second plate, and the support column moves in the radial direction along the long hole of the first plate. When the support column moves, the support column presses the stator core from the inside of the through hole in the radial direction, and therefore the stator core can be fixed to the skew correcting device by the pressing force. Further, since the skew correction device includes the first plate, the second plate, and the rotating body arranged in the axial direction of the stator, it is not necessary to arrange the device radially outside the stator, and the occupied area of the skew correction device can be reduced compared to the conventional device. In addition, the degree of freedom of the line structure can be improved by downsizing the device. Therefore, the stator can be fixed and the skew can be corrected with a small and simple structure as compared with the conventional art.

Further, the plurality of support columns arranged in the circumferential direction are moved in the radial direction in an interlocking manner only by rotating the rotating body, and therefore, the plurality of support columns can be moved simultaneously by one operation to fix and release the stator core. This reduces the time required for fixing the stator core to the skew correction device, and shortens takt time.

Therefore, it is possible to provide a stator skew correction device that can correct stator skew by shortening the time required for installation work with a small and simple configuration.

According to the device for correcting stator skew described in claim 2 of the present invention, since the guide portion is formed in a spiral shape, the guide portion is continuously inclined from the radial inner side to the outer side from one side to the other side in the circumferential direction. When the rotating body is rotated, the sliding portion of the support post slides along the spiral shape and moves in the radial direction with respect to the first plate. In this way, the support column can be pressed against the stator core by the rotation of the rotating body, thereby fixing the stator core.

According to the device for correcting stator skew according to claim 3 of the present invention, the worm portion of the second plate is rotated, whereby the rotating body can be rotated via the gear portion. On the other hand, since the worm part is not driven from the gear part, the rotor is not unintentionally rotated during the assembly operation, and the stator is not dropped. Therefore, it is not necessary to provide a spring or other fixing mechanism for holding the stator in a fixed state, and the manufacturing equipment can be simplified.

Therefore, the stator skew correction device can be used as a stator skew correction device which can reliably fix the stator with a simple structure.

According to the skew correction device of stator described in claim 4 of the present invention, since the first plate and the second plate are formed with the hollow hole penetrating in the axial direction, when the coil is mounted on the stator core from the first side in the axial direction, the coil end protruding toward the second side in the axial direction can be prevented from contacting the first plate and the second plate. After the coil is mounted, the stator may be turned upside down together with the skew correcting device, and the coil end protruding in the axial direction of the stator core may be processed.

Therefore, the skew correction device can be used as a skew correction device with excellent workability, which can easily mount the coil.

According to the skew correction device of stator described in claim 5 of the present invention, the insertion portion is inclined toward one radial side from the first plate toward the leading end portion, and therefore, if the support column moves toward one radial side, the leading end portion abuts on the inside of the through hole of the stator first. Here, in the support column, since the moment of the tip portion located farther from the first plate is larger and the displacement amount with respect to the load is larger than the base end portion connected to the first plate, when the stator is pressed, the force is concentrated on the base end portion than the tip portion, and unevenness in the surface pressure occurs. This may cause an indentation or the like at a position corresponding to the base end of the stator.

According to this configuration, the tip end portion having a large displacement comes into contact with the through hole first, and therefore, the surface pressure against the stator when the stator is pressed can be made substantially uniform. Therefore, the stator can be used as an excellent skew correction device in which the stator is less likely to be indented.

Drawings

Fig. 1 is an external perspective view of a stator according to a first embodiment.

Fig. 2 is an external perspective view of the skew correction device according to the first embodiment.

Fig. 3 is a perspective view of the first member of the first embodiment.

Fig. 4 is a cross-sectional view of the support column of the first embodiment taken along line IV-IV of fig. 2, as viewed from the side.

Fig. 5 is a perspective view of the second member of the first embodiment.

Fig. 6 is an explanatory diagram of the setting step.

Fig. 7 is an enlarged plan view of the vicinity of the through-holes of the stator core in the fixing step.

Fig. 8 is an explanatory diagram of a coil mounting step.

Fig. 9 is an explanatory view of the twisting step.

Fig. 10 is a perspective view of a second member of the second embodiment.

Fig. 11 is a cross-sectional view of the support stand of the third embodiment taken along the line IV-IV in fig. 2, as viewed from the side.

Description of the symbols

1: skew correction device

2: stator

5: stator core

6: coil

10: first plate

12: first hollow hole (hollow hole)

15: long hole

20: second plate

22: second hollow hole (hollow hole)

28: worm part

30: support column

33: insertion part

34: sliding part

35: inclined part

40: rotating body

42: guide part

43: gear part

50: through hole

61B (61): coil end

C2: axial line

Detailed Description

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

(first embodiment)

(stator)

The skew correction device 1 (stator skew correction device according to the present embodiment) in the present embodiment is a device for correcting skew of a stator. Therefore, the stator will be explained first.

Fig. 1 is an external perspective view of a stator 2. In fig. 1, a part of the coil 6 is omitted for the sake of explanation.

The stator 2 includes a stator core 5 and a coil 6.

The stator core 5 is formed in an annular shape. The stator core 5 has a through hole 50 and a slit 51.

The through-hole 50 penetrates the stator core 5 in the axial direction at the outer peripheral portion of the stator core 5. A plurality of (six in the present embodiment) through-holes 50 are formed in the circumferential direction. Bolts (not shown) for fixing the stator 2 at the time of assembly are inserted into the through holes 50. A plurality of slits 51 are formed in the inner circumferential surface of the stator 2.

The coil 6 is mounted in the slit 51 of the stator core 5. The plurality of coils 6 are inserted into the slits 51 from one side in the axial direction in a state of being overlapped in the circumferential direction, and the distal end portions of the coils 6 protruding from the slits 51 are bent in the circumferential direction to be fixed to the stator core 5. The coil 6 has a coil end 61 protruding further outward than the end face of the stator core 5 in the axial direction.

The rotor, not shown, is rotatably disposed inside the stator core 5 about a rotation axis C1 coaxial with the central axis of the stator core 5.

(skew correction device)

Fig. 2 is an external perspective view of the skew correcting apparatus 1.

The skew correcting device 1 is formed in an annular shape with the axis C2 as the center. The skew correcting apparatus 1 includes a first member 3 and a second member 4. In the following description, a direction along the axis C2 is sometimes referred to as an axial direction, a direction perpendicular to the axis C2 is sometimes referred to as a radial direction, and a direction around the axis C2 is sometimes referred to as a circumferential direction. In addition, a direction from the first member 3 toward the second member 4 in the axial direction of the axis C2 may be referred to as a downward direction (second side in the claims), and a direction from the second member 4 toward the first member 3 may be referred to as an upward direction (first side in the claims).

(first Member)

Fig. 3 is a perspective view of the first member 3 as viewed obliquely from below. In the description of the first member 3, reference is also made to fig. 1 and 2.

The first member 3 includes a first plate 10 and a support column 30.

The first plate 10 has a mounting surface 16 on which the stator 2 is mounted, and is formed in a ring shape with the axis C2 as the center. The first plate 10 has a first hollow hole 12, a protrusion 13, an engagement projection 14, and an elongated hole 15.

The first hollow hole 12 penetrates a radially central region of the first plate 10 in the axial direction. The inner diameter of the first hollow hole 12 is formed larger than the outer peripheral portion of the coil end 61 in a state where the stator 2 has been disposed on the first member 3.

The projection 13 projects radially outward from the outer peripheral portion 11 of the first plate 10. A plurality of (six in the present embodiment) protrusions 13 are provided in the circumferential direction.

The engaging convex portion 14 protrudes downward from the surface of the protruding portion 13 opposite to the installation surface 16.

The elongated hole 15 extends in the radial direction between the first hollow hole 12 and the outer peripheral portion 11 of the first plate 10, and penetrates the first plate 10 in the axial direction. The elongated hole 15 is formed in a rectangular shape having a long side in a radial direction when viewed from the axial direction. A plurality of (six in the present embodiment) long holes 15 are formed in the circumferential direction. The elongated hole 15 is formed between the engaging convex portions 14 adjacent in the circumferential direction.

The support column 30 is formed in a cylindrical shape elongated in the axial direction. The support columns 30 are inserted loosely into the elongated holes 15 of the first plate 10. The support column 30 is movable in the radial direction. A plurality of (six in the present embodiment) support columns 30 are arranged at intervals in the circumferential direction. The support column 30 has a wedge 32, an insertion portion 33, and a sliding portion 34.

The wedge 32 is provided on the lower side than the intermediate portion in the axial direction of the support column 30. The wedge 32 is connected to the first plate 10. The wedge 32 is formed in a rectangular shape when viewed from the axial direction. The circumferential side surface of the wedge 32 is slidably connected to the circumferential side surface of the elongated hole 15. Thereby, the wedge 32 is supported by the long hole 15 and is movable in the radial direction within the long hole 15.

Fig. 4 is a sectional view along line IV-IV of fig. 2, with the support column 30 viewed from the side.

The insertion portion 33 is disposed further above the wedge 32. The insertion portion 33 protrudes upward from the installation surface 16 of the first plate 10. When the stator core 5 has been set on the setting surface 16 of the first plate 10, the insertion portion 33 is inserted into the through-hole 50 of the stator core 5. The insertion portion 33 has an inclined portion 35 inclined outward in the radial direction as it goes upward from the first plate 10. In the present embodiment, the entire insertion portion 33 is defined as the inclined portion 35.

The insertion portion 33 may have, at least in part, an inclined portion 35 inclined outward in the radial direction as it goes upward from the first plate 10, that is, a portion of the insertion portion 33 may have the inclined portion 35.

The sliding portion 34 is disposed below the wedge 32. The sliding portion 34 protrudes downward from the lower surface of the first plate 10 by a length L. The sliding portion 34 is formed in a rectangular shape as viewed from the axial direction. The slide portion 34 is slidable along a guide portion 42 of the second member 4 described later.

(second Member)

Fig. 5 is a perspective view of the second member 4 as viewed from obliquely above. In the description of the second member 4, reference is also made to fig. 2.

The second member 4 includes the second plate 20 and the rotating body 40.

The second plate 20 is disposed below the first plate 10 and is formed in a ring shape with the axis C2 as the center. The second plate 20 has a second hollow hole 22, a rotor support portion 23, an engagement recess 24, and a worm portion 28.

The second hollow hole 22 penetrates a radially central region of the second plate 20 in the axial direction. The inner diameter of the second hollow hole 22 is formed to be equal in size to the inner diameter of the first hollow hole 12 of the first plate 10.

The rotator support 23 rotatably supports the rotator 40 with respect to the second plate 20. The rotor support portion 23 may be provided on the inner periphery of the second hollow hole 22.

The engaging recess 24 is provided on the upper surface of the second plate 20 at a position radially outward of the rotor 40. A plurality of (six in the present embodiment) engaging recesses 24 are formed in the circumferential direction. The engaging convex portions 14 of the first plate 10 engage the engaging concave portions 24. The engagement convex portion 14 is engaged with the engagement concave portion 24, so that the second plate 20 cannot rotate with respect to the first plate 10.

The worm part 28 is provided on the second plate 20 at a position radially outward of the rotator 40. The worm part 28 has a pair of support parts 25, a shaft 26, and a cylindrical part 27.

The support portion 25 is formed integrally with the second plate 20, and protrudes from the upper surface of the second plate 20. The support portion 25 has a shaft hole 29 penetrating in a direction orthogonal to the radial direction. The pair of support portions 25 are arranged with a space in the circumferential direction so that the shaft holes 29 are coaxial.

The shaft 26 is inserted through the shaft holes 29 of the pair of support portions 25. The shaft 26 is rotatably supported with respect to the support portion 25.

The cylindrical portion 27 is disposed between the pair of support portions 25 and fixed to the shaft 26. A spiral groove is formed on the outer circumferential surface of the cylindrical portion 27.

The rotor 40 is attached to the rotor support portion 23 of the second plate 20 and is configured to be rotatable with respect to the second plate 20 about the axis C2 as a rotation center. The rotating body 40 is formed in a ring shape. The rotating body 40 has a guide portion 42 and a gear portion 43.

The guide portion 42 is provided on the upper surface of the rotating body 40, and is inclined from one side to the other side in the circumferential direction, and from the inside to the outside in the radial direction. Specifically, the guide portion 42 is a groove formed on the upper surface of the rotating body 40. The guide portion 42 is formed in an Archimedes spiral (Archimedes spiral) circumferentially surrounding one turn so as to gradually expand in the radial direction in a left turn, as viewed from above in the axial direction.

The gear portion 43 is formed on the outer periphery of the rotating body 40. The gear portion 43 meshes with a spiral groove formed in the cylindrical portion 27 of the second plate 20. Accordingly, the cylindrical portion 27 of the second plate 20 is rotationally driven, and the gear portion 43 is driven to rotate the rotating body 40.

(method of manufacturing stator)

Next, a method for manufacturing the stator of the present embodiment will be described.

The method for manufacturing the stator includes a setting step, a fixing step, a coil mounting step, and a twisting step.

Fig. 6 is an explanatory diagram of the setting step. In the setting step, the stator core 5 is set in the skew correcting device 1. More specifically, in the installation step, the support columns 30 are inserted into the through-holes 50 of the stator core 5, and the stator core 5 is placed on the installation surface 16 of the first plate 10.

Fig. 7 is an enlarged plan view of the vicinity of the through-holes 50 of the stator core 5 in the fixing step. In a state after the setting step is completed, the supporting post 30 is positioned at the center of the through-hole 50. In the fixing step, the worm portion 28 of the second plate 20 is first driven to rotate the rotating body 40. When the rotating body 40 rotates, the sliding portion 34 of the supporting stay 30 slides along the guide portion 42, and the supporting stay 30 moves outward in the radial direction with respect to the first plate 10. Thereby, the outer peripheral portion located radially outward of the insertion portion 33 is in contact with the inner peripheral portion of the through-hole 50, and the support stay 30 presses the stator core 5 from the inside of the through-hole 50. Thereby, the stator core 5 is fixed to the skew correction device 1 so as not to be detachable.

Fig. 8 is an explanatory diagram of a coil mounting step. In the coil mounting step, the coil 6 is mounted on the stator core 5. Specifically, first, a plurality of coils 6 twisted into a substantially U shape are arranged in an annular shape while being overlapped in the circumferential direction. Next, the tip end of each coil 6 is inserted into the slit 51 of the stator core 5 from above in the axial direction. Thereby, the coil 6 is held by the stator core 5. A portion of the coil 6 that protrudes from the upper end surface of the stator core 5 is a transition portion 61A.

Fig. 9 is an explanatory view of the twisting step. In the twisting step, the stator core 5 is first fixed to the skew correction device 1 and inverted vertically (the state of fig. 9). At this time, the first member 3 is disposed below the second member 4. In addition, the leading end portion of the coil 6 (the coil end 61B thereafter) mounted by the coil mounting step protrudes from the upper surface of the stator core 5 in the vertically inverted state of fig. 9. Next, the tip end portion of the coil 6 is twisted in the circumferential direction, whereby the coil 6 cannot be separated in the axial direction, and the coil 6 is fixed to the stator core 5. Thereafter, the leading end portions of the adjacent coils 6 are joined to each other, thereby manufacturing the stator 2.

(action, Effect)

Next, the operation and effect of the skew correcting apparatus 1 will be described.

When the stator 2 is manufactured using the skew correcting device 1, first, the stator core 5 is set on the setting surface 16 of the first plate 10 of the skew correcting device 1, and the support columns 30 are inserted into the through holes 50 of the stator core 5. Next, the worm part 28 is driven to rotate the rotating body 40. Since the rotating body 40 has the guide portion 42 inclined from one side to the other side in the circumferential direction and from the inner side to the outer side in the radial direction, and the supporting column 30 extends in the axial direction and has the sliding portion 34 sliding along the guide portion 42, the rotating body 40 is rotated with respect to the first plate 10 and the second plate 20, and the supporting column 30 moves in the radial direction along the long hole 15 of the first plate 10. When the support column 30 moves, the support column 30 presses the stator core 5 in the radial direction from the inside of the through hole 50, and therefore the stator core 5 can be fixed to the skew correcting device 1 by the pressing force. Thereafter, the coil 6 is mounted on the stator core 5.

In this manner, the stator core 5 is pressed in the radial direction by the support columns 30, so that it is possible to correct skew acting on the stator core 5 when the coil 6 is mounted or when the coil 6 is twisted, and to manufacture the stator 2.

Further, since the skew correction device 1 mainly includes the first plate 10, the second plate 20, and the rotating body 40 arranged in the axial direction of the stator core 5, it is not necessary to arrange a device radially outside the stator 2, and the occupied area of the skew correction device 1 can be reduced compared to the conventional art. In addition, the degree of freedom of the line structure can be improved by downsizing the device. Therefore, the stator 2 can be fixed and the skew can be corrected with a small and simple structure as compared with the conventional art.

Further, the plurality of support columns 30 arranged in the circumferential direction are moved in the radial direction in an interlocking manner only by rotating the rotating body 40, and therefore the plurality of support columns 30 can be moved simultaneously by one operation to fix and release the stator core 5. This reduces the labor required for fixing the stator core 5 to the skew correction device 1, and shortens the tact time.

Therefore, it is possible to provide a stator skew correction device 1 that can correct the skew of the stator 2 by shortening the time required for installation work with a small and simple configuration.

Further, since the guide portion 42 of the rotating body 40 is formed in a spiral shape, the guide portion 42 continuously inclines from one side to the other side in the circumferential direction and from the inner side to the outer side in the radial direction. When the rotating body 40 is rotated, the sliding portion 34 of the supporting column 30 slides along the spiral shape and moves in the radial direction with respect to the first plate 10. In this way, the support columns 30 can be pressed against the stator core 5 by the rotation of the rotating body 40, and the stator core 5 can be fixed.

Therefore, the skew correction device 1 for a stator having a simple structure can be provided.

According to the configuration of the present embodiment, the worm part 28 of the second plate 20 is rotated, whereby the rotating body 40 can be rotated via the gear part 43. On the other hand, since the worm part 28 is not driven from the gear part 43, the rotor 40 is not unintentionally rotated during the assembly operation and the stator 2 is not detached. Therefore, it is not necessary to provide a spring or other fixing mechanism for maintaining the fixed state of the stator 2, and the manufacturing facility can be simplified.

Therefore, the skew correction device 1 can be used as a stator that can reliably fix the stator 2 with a simple configuration.

Further, since the first plate 10 and the second plate 20 are formed with the hollow hole 12 and the hollow hole 22 penetrating in the axial direction, when the coil 6 is attached to the stator core 5 from the first side (upper side) in the axial direction, the coil end 61B protruding toward the second side (lower side) in the axial direction can be prevented from coming into contact with the first plate 10 and the second plate 20. After the coil 6 is attached, the stator 2 may be turned upside down together with the skew correcting device 1, and the coil end 61B protruding in the axial direction of the stator 2 may be processed.

Therefore, the skew correction device 1 can be easily mounted with excellent workability.

Further, since the insertion portion 33 of the supporting stay 30 is inclined toward the radial direction side from the first plate 10 toward the tip end portion, when the supporting stay 30 moves toward the radial direction side, the tip end portion first comes into contact with the inside of the through-hole 50 of the stator core 5. Here, in the support column 30, since the moment of the tip portion located farther from the first plate 10 is larger and the displacement amount with respect to the load is larger than the base end portion connected to the first plate 10, when the stator core 5 is pressed, the force concentrates on the base end portion than the tip end portion, and unevenness in surface pressure occurs. This may cause an indentation or the like at a position corresponding to the base end of the stator core 5.

According to this configuration, the tip end portion having a large displacement comes into contact with the through-hole 50 first, and therefore the surface pressure against the stator core 5 when the stator core 5 is pressed can be made substantially uniform. Therefore, the excellent skew correction device 1 in which the stator core 5 is less likely to have indentations and the like can be obtained.

In addition, according to the method of manufacturing the stator 2 of the present embodiment, the stator core 5 is set in the skew correction device 1 in the setting step, the stator core 5 is fixed by the rotation of the rotating body 40 in the fixing step, and the coil 6 is attached to the stator core 5 in the coil attaching step, whereby the stator 2 can be manufactured. In this way, when the coil 6 is mounted on the stator 2, which is likely to cause distortion, the coil 6 can be mounted on the stator 2 while the distortion of the stator 2 is corrected by the distortion correcting device 1. Thereby, the stator 2 with high performance in which the skew is suppressed can be manufactured.

Therefore, it is possible to provide a method for manufacturing the stator 2 that can reduce the time required for installation work and correct distortion of the stator 2 with a small and simple configuration.

In addition, in the twisting step after the coil mounting step, the coil 6 may be fixed to the stator core 5 by twisting the coil end 61B that has protruded toward the second side in the axial direction. Therefore, in a state where the stator 2 has been set in the skew correction device 1, the skew can be corrected, and the mounting of the coil 6 is completed.

Therefore, the method can be used as a method for manufacturing the stator 2 with excellent assembling workability.

In the present embodiment, the engaging convex portion 14 of the first plate 10 is engaged with the engaging concave portion 24 of the second plate 20, but the present invention is not limited thereto. The engaging convex portion 14 of the first plate 10 may be directly bonded to the upper surface of the second plate 20 by an adhesive or the like. In addition, the first plate 10 and the second plate 20 may be integrally formed.

In addition, the helix of the guide 42 may be reversed. That is, when viewed from above in the axial direction, the spiral shape may be formed in an archimedean spiral that makes one turn in the circumferential direction so as to gradually expand in the radial direction during a right turn.

In the present embodiment, the supporting columns 30 are configured to move radially outward to press the stator core 5, but the present invention is not limited to this. The stator core 5 may also be pressed by the support columns 30 moving toward the radially inner side.

The sliding portion 34 and the wedge 32 may be formed in shapes other than rectangular shapes, for example, circular shapes, as viewed from the axial direction.

Next, a second embodiment and a third embodiment of the present invention will be described. Fig. 10 is a perspective view of the second member 4 according to the second embodiment of the present invention, as viewed from obliquely above. Fig. 11 is a sectional view of the support column 30 of the third embodiment of the present invention, taken along the line IV-IV in fig. 2, as viewed from the side.

In the following description, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate. Reference is also made to fig. 1 to 9 for reference numerals relating to configurations other than those shown in fig. 10 and 11.

(second embodiment)

A second embodiment of the present invention will be explained. The present embodiment is different from the above-described embodiment in that the guide portion 42 is formed in a linear shape.

The guide portion 42 is formed in a linear shape inclined so as to gradually increase the distance from the axis C2 in a left turn, as viewed from above in the axial direction. In other words, the guide portion 42 is formed in a linear shape inclined from one side to the other side in the circumferential direction, and from the inner side to the outer side in the radial direction. In this case, the guide portions 42 are formed only in the same number as the number of the supporting columns 30 arrayed in the circumferential direction. In the present embodiment, six guide portions 42 are formed along the circumferential direction.

In the present embodiment, since only the linear groove is required to be formed, the guide portion 42 can be easily processed, except for obtaining the same operational effects as those of the first embodiment.

(third embodiment)

A third embodiment of the present invention will be explained. The present embodiment is different from the above-described embodiment in that the rotating body 40 is disposed radially inward of the second plate 20.

The rotating body 40 is located radially inward of the inner peripheral portion of the second hollow hole 22 of the second plate 20. The guide portion 42 of the rotating body 40 is formed at a position radially inward of the inner peripheral portion of the second hollow hole 22. In addition, the sliding portion 34 of the support stand 30 protrudes downward from the lower surface of the first plate 10 by only the length L. At this time, the lower end 36 of the sliding portion 34 extends below the upper surface of the second plate 20.

In the present embodiment, the projecting length L of the sliding portion 34 can be made long, except for the same operational effects as those of the first embodiment. Thereby, the radial reaction force received from the stator core 5 when the support column 30 presses the stator core 5 can be blocked by the slide portion 34. Therefore, the strength of the skew correcting device 1 can be improved.

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the present invention.

In the above embodiment, the guide portion 42 is recessed in the rotating body 40 as an example, but the present invention is not limited to this. That is, the guide 42 may protrude from the upper surface of the rotating body 40, and the sliding portion 34 engaged with the guide 42 may have a concave portion at a lower end portion thereof to engage with the guide 42.

Further, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the scope of the present invention, and the above-described modifications may be combined as appropriate.

Claims

1. A skew correcting apparatus for a stator, comprising:

a rotating body which is rotatably attached around an axis and has a guide portion which is inclined from one side to the other side in a circumferential direction and from an inner side to an outer side in a radial direction;

a first plate which is disposed on a first side in an axial direction of the rotating body, has a long hole extending in the radial direction, and has a stator core disposed thereon;

a second plate that is disposed on a second side of the rotating body in the axial direction, rotatably supports the rotating body, and fixes the first plate; and

and a plurality of support columns extending in the axial direction and arranged along the circumferential direction, each support column having an insertion portion into which a through hole of the stator core is inserted, and a slide portion that slides along the guide portion, and being inserted into the long hole in a floating manner.

2. The apparatus for correcting skew of a stator according to claim 1,

the guide portion is formed in a spiral shape as viewed from the axial direction.

3. The skew correction device for a stator according to claim 1 or 2,

the rotating body has a gear portion along the circumferential direction, and

the second plate has a worm part engaged with the gear part.

4. The skew correction device for a stator according to claim 1 or 2,

in the first plate and the second plate, a hollow hole penetrating in the axial direction is formed in a central region in the radial direction.

5. The apparatus for correcting skew of a stator according to claim 3,

6. The skew correction device for a stator according to claim 1 or 2,

the insertion portion has, at least in a part thereof, an inclined portion that inclines to one side in the radial direction as it goes away from the first plate in the axial direction.

7. The apparatus for correcting skew of a stator according to claim 3,

8. The apparatus for correcting skew of a stator according to claim 4,