JP2005323433A - Manufacturing apparatus and method of rotating electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing apparatus and a method of a rotating electric machine which can surely perform the insulation of a coil and a stator core. <P>SOLUTION: Since a pusher reforming part 5b exists in a pusher 5, it is regulated that the opening end 3d of slot sheet 3 is bent by the pusher reforming part 5b. The opening end 3d of the slot sheet 3 is inserted in a slot 2 after being corrected into a substantially linear state by being along the front surface of the pusher reform 5b. Then, the height of the slot sheet of a bent part 3e in the inserting direction and the height of the slot sheet of the opening end 3d in the inserting direction become substantially the same. Accordingly, the amount Nb1 of a discharge margin at the bent part 3e side and the amount Na1 of the discharge margin of the opening end 3d side become substantially the same. The entirety of cuffs end 3b can be made to be brought into contact with the upper end face 1u of the stator core. That is, the lack of the amount of the discharge margin caused by the lack of the insert of the slot sheet 3 can be prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotating electrical machine manufacturing apparatus and manufacturing method, and more particularly to a rotating electrical machine manufacturing apparatus and manufacturing method capable of reliably performing insulation between a coil and a stator core.

  Conventional methods described in Patent Documents 1 and 2 will be described with respect to a method for insulating a stator core (stator core) and a coil provided in the slot in the manufacturing process of the rotating electrical machine. As shown in FIG. 7, slot paper 103 that is bent into a shape substantially the same as the planar shape of the slot 102 is inserted into a plurality of slots 102 provided in the stator core 101 of the rotating electrical machine. The slot paper 103 is formed with a cuff portion 103 a formed by bending the slot paper on the front end side and the rear end side in the insertion direction into the slot 102. The slot paper 103 is made of an electrically insulating material, and maintains electrical insulation between a coil (not shown) and the stator core 101. After the slot paper 103 is inserted, the cuff tip end portion 103b abuts against the stator core upper end surface 101u of the stator core 101, so that the slot paper 103 is prevented from being pulled out and the position thereof is maintained.

Further, Patent Document 2 is disclosed for other rotating electrical machine manufacturing apparatuses.
JP-A-6-343237 (paragraphs 0003-0004) JP-A-11-178292 (paragraphs 0001-0002)

  The above prior art does not describe the deformation at the time of insertion of the slot paper, or the insufficient amount of projection of the slot paper from the upper and lower end surfaces of the stator core. FIG. 8 shows a state immediately after the slot paper 103 is completely inserted into the slot 102. 8A is a top view of the slot 102 as viewed from the upper surface in the axial direction of the stator core 101, FIG. 8B is a cross-sectional view taken along the line AA in the top view, and FIG. 8C is a direction of arrow B in the cross-sectional view. It is the figure seen from (the teeth 104 are disregarded). The slot paper 103 is inserted into the slot 102 by the pusher 105 in the arrow Z direction.

  In FIG. 8C, the amount of protrusion of the slot paper 103 from the stator core upper end surface 101u is defined as the amount of allowance. At this time, when the amount of allowance Na on the opening end 103d side of the slot paper 103 is compared with the amount of allowance Nb on the curved portion 103e side, the amount of allowance Na is smaller. Then, the cuff tip end portion 103b (region R1 in the drawing) located on the curved portion 103e side protrudes upward beyond the stator core upper end surface 101u, but the cuff tip portion 103b (region R2 in the drawing) located near the opening end portion 103d. ) Does not protrude upward beyond the stator core upper end surface 101u. That is, the slot amount of the slot paper 103 is insufficient on the opening end 103d side.

  Here, the cuff tip end portion 103b is in contact with the stator core upper end surface 101u, thereby preventing the slot paper 103 from coming out of the slot 102. Therefore, if there is a portion (region R2) where the cuff tip portion 103b does not protrude from the stator core upper end surface 101u, a slot is applied to the slot paper 103 in the manufacturing process in the downward direction (opposite to the arrow Z) in the drawing. The paper 103 may come out of the slot 102. Further, when a force is applied to push the slot paper 103 toward the inside of the slot 102 when a coil is wound around the slot 102, a portion of the slot paper (region R2) that is not held by the cuff tip end portion 103b is formed. There is a possibility that a situation of entering the slot 102 may occur. This is a problem because insulation between the coil and the stator core 101 may not be ensured.

  Further, if the slot paper has a longer dimension in the Z direction and a margin is provided for the cuff tip end portion 103b to protrude to the stator core upper end surface 101u, the above-mentioned insufficient insertion problem can be avoided. . When the coil is wound around the slot, the coil comes into contact with the protruding portion of the slot paper 103. However, if the amount of allowance increases, the force applied from the coil to the protruding portion increases, and the slot paper 103 is torn. This is a problem because there is a possibility that the insulation between the coil and the stator core cannot be secured. In addition, since the breakage of the protruding portion of the slot paper 103 is more likely to occur when the coil molding is performed at a high density in order to reduce the size of the motor, it is difficult to reduce the size of the motor by increasing the Z direction dimension of the slot paper. This is a problem.

  The present invention has been made to solve at least one of the problems of the prior art, and prevents the occurrence of a shortage of the slot paper when the slot paper is inserted into the slot. It is an object of the present invention to provide a manufacturing apparatus and a manufacturing method of a rotating electrical machine that can reliably perform insulation with a stator core.

  In order to achieve the above object, a rotating electrical machine manufacturing apparatus according to claim 1 inserts a slot paper having a cuff part and a folded part constituting the cuff part into a slot of a stator core of the rotating electrical machine by a pusher. In the rotating electrical machine manufacturing apparatus, the pusher includes a pusher abutting surface that abuts on the folded portion on the rear end side in the insertion direction of the slot paper, and a restricting portion that restricts the slot paper from being bent. And a pusher straightening portion that is erected.

  The rotating electrical machine manufacturing apparatus according to claim 2 inserts a slot paper having a cuff part and a folded part constituting the cuff part into a slot of a stator core of the rotating electrical machine by a pusher, and folds the leading end side in the insertion direction. In a rotating electrical machine manufacturing apparatus including an insertion end positioning jig for positioning a portion, the insertion end positioning jig is configured such that the insertion end abutting surface with which the folded portion on the leading end side in the insertion direction of the slot paper abuts and the slot paper bends. And a jig correcting part that is provided upright on the insertion end contact surface and inserted into the slot.

  The cuff portion is configured by folding back the slot paper at the front end side and the rear end side in the slot paper insertion direction. The pusher abutting surface comes into contact with a folded portion on the rear end side in the insertion direction of the slot paper, and the slot paper is inserted into the slot by the pusher. The folded portion on the leading end side in the insertion direction of the slot paper comes into contact with the insertion end contact surface. The restricting portion restricts the slot paper from being bent. Here, for example, the restricting portion is configured in a planar shape, and a structure that restricts the bending when the slot paper abuts on the flat surface is exemplified. The pusher correction portion includes the restriction portion and is erected on the pusher contact surface. The jig correction part includes the restriction part and is erected on the insertion end contact surface. When the slot paper is inserted, the slot paper is prevented from being bent by being guided by the pusher correction section or the jig correction section.

  Thereby, the protrusion amount from the axial upper end surface or lower end surface of the stator core to the folded portion of the slot paper can be made constant over the entire folded portion. Then, it is possible to prevent a shortage of protrusion from occurring in a part of the slot paper. When the amount of protrusion is insufficient, the cuff part may not be in contact with the upper end surface or the lower end surface of the stator core and may be present in the slot. As a result, the insulation between the coil and the stator core may not be secured. However, it is possible to prevent the occurrence of the above-described insulation failure by preventing the protrusion amount from being insufficient.

  Note that the pusher correcting portion may have a substantially rectangular shape with one side having a width narrower than the width of the pusher contact surface in the circumferential direction of the stator core. Moreover, the jig correction part may have a substantially rectangular shape with one side having a width narrower than the width of the insertion end contact surface in the circumferential direction of the stator core. The rectangular side surface portion is a restricting portion that restricts the bending of the slot paper. The slot paper is restricted from being bent by the restricting portion, and is corrected to a substantially straight line along the restricting portion.

  It should be noted that at least a part of the pusher correction portion may be erected on the pusher contact surface at a position where the folded portion provided at the opening end of the slot paper contacts. Further, at least a part of the jig correcting portion may be erected at a position where the folded portion provided at the opening end portion of the slot paper abuts on the insertion end abutting surface. The opening end portion is constituted by the end portions of the slot paper obtained by bending the slot paper. Folded portions exist on the front end side and the rear end side in the insertion direction of the opening end. The folded portion on the rear end side in the insertion direction of the opening end portion contacts the pusher contact surface. A folded portion on the distal end side in the insertion direction of the opening end is in contact with the insertion end contact surface. Since at least a part of the pusher correction part or at least a part of the jig correction part is erected at the position where the folded part abuts, the opening end of the slot paper is always bent by the pusher correction part or the jig correction part. Is prevented.

  The opening end is weaker than other parts and is the most easily bent portion of the slot paper. Therefore, if bending at the opening end is prevented, it can be prevented from the upper end surface or the lower end surface of the stator core. The protruding distance to the folded portion can be made substantially the same over the entire area of the folded portion. As a result, it is possible to prevent the slot paper from being insufficiently projected.

  In addition, in the manufacturing method of the rotating electrical machine in which the slot paper is inserted into the slot of the stator core of the rotating electrical machine, the slot paper may be inserted into the slot after the slot paper is restricted from being bent. In addition, the slot paper may be bent at the same time as the slot paper is inserted into the slot.

  According to the present invention, in a rotating electrical machine manufacturing apparatus and manufacturing method, when a slot paper having a cuff portion is inserted into a slot, occurrence of a shortage of the slot paper is prevented across the entire slot paper. Can do. Therefore, the cuff part can be reliably brought into contact with the upper and lower surfaces of the stator core, so that the coil and the stator core can be reliably insulated.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a rotating electrical machine manufacturing apparatus according to the present invention will be described below in detail with reference to FIGS. A first embodiment according to the present invention will be described with reference to FIGS. The perspective view of the pusher 5 with which the manufacturing apparatus of the rotary electric machine concerning 1st Embodiment was equipped in FIG. 1 is shown. The pusher 5 includes a pusher contact surface 5a and a pusher correction portion 5b. The folded portion 3c on the rear end side in the insertion direction of the slot paper 3 comes into contact with the pusher contact surface 5a. The pusher correction portion 5b has a width W2 that is narrower than the width W1 of the stator core in the circumferential direction of the pusher contact surface 5a. The pusher correcting portion 5b is erected on the pusher contact surface 5a.

  FIG. 2 shows a state immediately after the slot paper 3 is completely inserted into the slot 2. 2A is a top view of the slot 2 as viewed from the upper surface in the axial direction of the stator core 1, FIG. 2B is a cross-sectional view taken along the line A1-A1 in the top view, and FIG. 8C is the arrow B1 direction in the cross-sectional view. It is the figure seen from (tooth 4 is disregarded). A slot paper 3 is inserted into the slot 2 in the direction of the arrow Z from the bottom to the top by a pusher 5 provided in a slot paper insertion device (not shown).

  The operation will be described. In the conventional view of FIG. 8, when the slot paper 103 is inserted, the slot paper 103 receives a resistance force opposite to the insertion direction. At this time, the curved portion 103e of the slot paper 103 has a high strength because it is configured by a surface, and deformation is suppressed. On the other hand, since the opening end 103d is not formed with a surface and has low strength, the opening end 103d is deformed without being able to support the resistance, and bends inside the slot in a curved line (FIG. 8B). Then, since the height in the insertion direction (arrow Z direction) at the opening end portion 103d of the slot paper 103 is reduced, in FIG. 8C, the opening end portion 103d is compared with the protruding amount Nb on the curved portion 103e side. The amount of allowance on the side Na becomes smaller, and the cuff tip end portion 103b (region R2 in the figure) located in the vicinity of the opening end portion 103d does not protrude upward beyond the stator core upper end surface 101u.

  On the other hand, in FIG. 2, since the pusher correcting portion 5b exists, the opening end portion 3d of the slot paper 3 is restricted from being bent by the pusher correcting portion 5b, and is corrected substantially linearly along the surface of the pusher correcting portion 5b. Is done. The slot paper 3 is then straightened and inserted into the slot 2. Then, as shown in FIG. 2C, the height of the curved portion 3e in the insertion direction of the slot paper and the height of the opening end portion 3d in the insertion direction of the slot paper are substantially the same. Therefore, the allowance amount Nb1 on the curved portion 3e side and the allowance amount Na1 on the opening end 3d side are substantially the same, and the entire cuff tip 3b can be brought into contact with the stator core upper end surface 1u. That is, it is possible to prevent a shortage in allowance caused by insufficient insertion of the slot paper 3.

  Thereby, the effect of preventing the slot paper 3 from coming out of the slot 2 can be obtained by bringing the entire cuff tip 3b into contact with the stator core upper end face 1u. Therefore, it is possible to prevent the slot paper 3 from coming out of the slot 2 when a force is applied to the slot paper 3 downward in the drawing (in the direction opposite to the arrow Z) in the manufacturing process. Further, even when a force for pushing the slot paper toward the inside of the slot is applied, such as when a coil is wound around the slot, it is possible to prevent a situation where the protruding portion of the slot paper 3 enters the slot 2. Then, when the coil is wound around the slot, insulation between the coil and the stator core 1 can be ensured.

  This also makes it unnecessary to lengthen the Z-direction dimension of the slot paper 3 in order to avoid insufficient insertion, and to take a margin for the cuff tip 3b to protrude to the stator core upper end surface 1u. Then, the amount of allowance can be suppressed, and when the amount of allowance is reduced, the force applied from the coil to the exit portion of the slot paper 3 when the coil is wound around the slot 2 can be reduced. It is possible to reduce the risk of tearing 103.

  The same effect as that of the upper surface can be obtained on the lower surface of the stator core 1 in the axial direction. On the lower surface side of the stator core in the conventional view shown in FIG. 8C, the allowance amount Nad on the opening end 103d side is smaller than the allowance amount Nbd on the curved portion 103e side. The cuff tip end portion 103bd located in the vicinity of the opening end portion 103d does not protrude downward beyond the stator core lower end surface 101d. That is, due to over-insertion, a shortage amount of slot paper 103 occurs. However, in the present embodiment, as shown in FIG. 2, the opening end 3d of the slot paper 3 is corrected to a substantially straight line, so that the amount of protrusion Nb1d on the curved portion 3e side on the lower surface of the stator core 1 and the opening end The allowance amount Na1d on the portion 3d side can be made substantially the same, and the entire cuff tip 3bd can be brought into contact with the stator core lower end surface 1d.

  In FIG. 3, a position where the folded portion 3c (FIG. 3 region R3) provided in the opening end 3d of the slot paper 3 contacts the pusher contact surface 5a is defined as a contact position R4. At this time, the pusher 5 may be configured to include a pusher correcting portion 5c that is at least partially erected at the contact position R4. The opening end 3d having the weakest strength is most deformed by the resistance force when the slot paper is inserted, and the opening allowance 3d is bent to the inside of the slot. Therefore, if the bending of the opening end 3d of the slot paper 3 is corrected, it is possible to prevent the above-described shortage of the allowance without correcting the curved portion 3e side of the slot paper 3. Therefore, as shown in FIG. 3, a configuration in which the pusher correcting portion 5c is erected only in the vicinity of the contact position R4 is possible. Accordingly, the size of the pusher correcting portion 5c can be reduced while obtaining the same effect as the pusher correcting portion 5b (FIG. 1), so that the clearance between the slot paper 3 and the inner wall surface of the slot 2 is increased. Therefore, it is possible to reduce resistance when inserting slot paper. In addition, the weight of the pusher can be reduced.

  A second embodiment according to the present invention will be described with reference to FIGS. FIG. 4 shows a disk-shaped insertion end positioning jig 7 provided in the rotating electrical machine manufacturing apparatus according to the second embodiment. FIG. 4A shows a bottom view of the insertion end positioning jig 7. FIG. 4B shows a cross-sectional view of the insertion end positioning jig 7 and the stator core 1 along the line CC in the bottom view. The insertion end positioning jig 7 is provided with an insertion end contact surface 7a, and a jig correction portion 7b is erected on the insertion end contact surface 7a. The folded portion on the leading end side in the insertion direction of the slot paper comes into contact with the insertion end contact surface 7a. Since the structure of the jig correction part 7b is the same as that of the pusher correction part 5b described above, the description thereof is omitted. The insertion end positioning jig 7 is placed on the upper surface of the stator core 1. At this time, each of the jig correction portions 7 b is placed so as to be inserted into the corresponding slot 2.

  FIG. 5 shows a state in which the slot paper 3 is inserted in the direction of the arrow Z in the slot 2 in which the jig correcting portion 7b is inserted, and the insertion is completed. 5A is a cross-sectional view passing through the opening end 3d of the slot paper 3, and FIG. 5B is a side view as viewed from the direction of the arrow B2 in the cross-sectional view (the teeth 4 are ignored).

  The insertion end positioning jig 7 is provided with an allowance reference surface 7d, which abuts against the stator core upper end surface 1u. At this time, the insertion end contact surface 7a is fixed at a position having a distance NN from the stator core upper end surface 1u. When the slot paper 3 is inserted, the folded-back portion 3c on the distal end side in the insertion direction comes into contact with the insertion end contact surface 7a to complete the insertion, so that the insertion end is positioned, and the slot paper 3 is The allowance amounts Na2 and Nb2 are the same as the distance NN. Therefore, by adjusting the distance NN, it is possible to set the amount of allowance to a desired value.

  The operation will be described. The slot paper 3 is inserted into the slot 2 in the direction of the arrow Z from the lower part to the upper part by the pusher 5 not provided with the pusher correcting part. Since the jig correction section 7b is inserted into the slot 2, the slot paper 3 is inserted into the slot 2 and is simultaneously guided by the jig correction section 7b. The slot paper 3 is corrected to be substantially straight by being restricted by the jig correcting portion 7b. Therefore, as shown in FIG. 5B, the allowance amount Nb2 on the curved portion 3e side and the allowance amount Na2 on the opening end portion 3d side are substantially the same, and the cuff tip 3b over the entire upper surface of the slot paper 3 is The stator core can be brought into contact with the upper end surface 1u of the stator core. In other words, it is possible to prevent a shortage amount due to insufficient insertion of the slot paper 3.

  As a result, as in the first embodiment, it is possible to prevent the slot paper 3 from being pulled out of the slot 2 and the situation in which the protruding portion of the slot paper 3 enters the slot 2, and the insulation between the coil and the stator core 1 can be prevented. Can be secured.

  As in the first embodiment, it is needless to say that an effect of preventing the occurrence of a shortage allowance can also be obtained on the lower surface in the axial direction of the stator core 1. That is, the amount of allowance Nb2d on the curved portion 3e side on the lower surface of the stator core 1 and the amount of allowance Na2d on the open end 3d side are substantially the same, and the cuff tip end portion 3bd over the entire lower surface of the slot paper 3 is used as the stator core lower end surface 1d. It is possible to abut.

  In FIG. 6, a position where the folded portion 3c (FIG. 3 region R5) provided in the opening end 3d of the slot paper 3 contacts the insertion end contact surface 7a is defined as a contact position R6. At this time, the insertion end positioning jig 7 may be provided with a jig correcting portion 7c that is at least partially erected at the contact position R6. In addition, since the effect of the jig correction part 7c is the same as that of the pusher correction part 5c of 1st Embodiment, description is abbreviate | omitted here.

  The present invention is not limited to the above-described embodiment, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the present invention. Although the pusher correction part and the jig correction part are substantially rectangular, they are not limited to this form. For example, the pusher correction part and the jig correction part may have a rail-shaped restriction part configured parallel to the insertion direction, and may be erected on the pusher contact surface and the insertion end contact surface. It is also possible to provide a plurality of shaped restricting portions and stand upright on the pusher contact surface and the insertion end contact surface.

It is a perspective view of pusher 5 concerning a 1st embodiment. FIG. 6 is a view showing a state immediately after the slot paper 3 is completely inserted in the first embodiment. It is a perspective view of the pusher 5 provided with the pusher correction | amendment part 5c in 1st Embodiment. It is a figure which shows the insertion end positioning jig 7 concerning 2nd Embodiment. It is a figure which shows the state immediately after insertion of the slot paper 3 in 2nd Embodiment is completed. It is a figure which shows the insertion end positioning jig 7 provided with the jig correction part 7c in 2nd Embodiment. It is a figure which shows the insertion process of the slot paper in a prior art. It is a figure which shows the state immediately after the insertion of the slot paper 103 in a prior art is completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator core 2 Slot 3 Slot paper 5 Pusher 5a Pusher contact surface 5b, 5c Pusher correction | amendment part 7 Insertion end positioning jig 7a Insertion end contact surface 7b, 7c Jig correction parts Na, Na1, Na2, Na1d, Nad, Nb, Nb1 , Nb2, Nb2d, Nbd

Claims (8)

In a rotating electrical machine manufacturing apparatus in which slot paper including a cuff portion and a folded portion constituting the cuff portion is inserted into a slot of a stator core of the rotating electrical machine by a pusher.
The pusher is
A pusher contact surface that contacts the folded portion on the rear end side in the insertion direction of the slot paper;
An apparatus for manufacturing a rotating electrical machine, comprising: a restricting portion that restricts bending of the slot paper; and a pusher correcting portion standing on the pusher contact surface. A rotation provided with an insertion end positioning jig for inserting a slot paper having a cuff part and a folded part constituting the cuff part into a slot of a stator core of a rotating electric machine by a pusher, and positioning the folded part on the leading end side in the insertion direction. In electrical equipment manufacturing equipment,
The insertion end positioning jig is
An insertion end contact surface with which the folded portion on the leading end side in the insertion direction of the slot paper contacts;
An apparatus for manufacturing a rotating electrical machine, comprising: a jig correcting section that is provided with a regulating section that regulates bending of the slot paper and is erected on the insertion end abutting surface and inserted into the slot.   2. The rotating electrical machine manufacturing apparatus according to claim 1, wherein the pusher correction portion has a substantially rectangular shape with a width narrower than a width of the pusher contact surface in a circumferential direction of the stator core.   3. The rotating electrical machine manufacturing apparatus according to claim 2, wherein the jig correcting portion has a substantially rectangular shape with a width narrower than a width of the insertion end contact surface in a circumferential direction of the stator core.   2. The pusher correcting portion is provided with at least a part of the pusher correcting portion standing at a position where the folded portion provided at the opening end portion of the slot paper contacts. Item 4. A rotating electrical machine manufacturing apparatus according to at least one of items 3 to 3.   The at least part of the jig correcting portion is erected at a position where the folded portion provided at the opening end portion of the slot paper abuts on the insertion end abutting surface. The manufacturing apparatus of a rotary electric machine in at least any one of Claim 4. In a method of manufacturing a rotating electrical machine in which slot paper is inserted into a slot of a stator core of the rotating electrical machine,
A method of manufacturing a rotating electrical machine, wherein the slot paper is restricted from being bent and the slot paper is inserted into the slot. In a method of manufacturing a rotating electrical machine in which slot paper is inserted into a slot of a stator core of the rotating electrical machine,
A method of manufacturing a rotating electrical machine, wherein the slot paper is restricted from being bent at the same time as the slot paper is inserted into the slot.

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