JP5791179B2 - Skewed stator manufacturing equipment - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a skewed stator in which a coil is mounted on a stator core that is formed by laminating magnetic metal pieces and is twisted so that the metal pieces are gradually displaced.

  2. Description of the Related Art Conventionally, a stator of a rotating electrical machine has a cylindrical stator core having a plurality of teeth (magnetic poles) that are radially arranged and projecting in an inner diameter direction, and a plurality of slots that are opened therebetween, and a coil side portion that is placed in the slot. And a stator coil mounted on the core. The stator core is formed by laminating a plurality of magnetic metal pieces. A stator coil is manufactured separately from the stator core, and then the annular stator coil is accommodated in each slot of the stator core.

  On the other hand, a rotor (rotor) is inserted into such a stator later, but in order to make the rotation of the rotor smooth, a twist (skew) is given to the stator core, and It is known to reduce vibration and noise of the rotating electrical machine by applying a continuous suction or repulsion force between them. As a specific method for manufacturing such a skewed stator, after inserting a coil into the slot in a state where the slot is parallel to the axial direction of the stator core, a method of twisting so that the magnetic metal piece is gradually displaced ( For example, see Patent Document 1). In this skewed stator manufacturing method, as shown in FIG. 12, notches 2 a that are aligned with each other are provided on the outer periphery of a plurality of metal pieces 2 constituting the stator core 1, and a coil (not shown) is provided in the slot 6 of the stator core 1. After the insertion, the plate 3 is inserted along the matching notches 2a of the plurality of metal pieces 2, and the plate 3 is rotated as indicated by the solid arrow to be inclined with respect to the axis of the stator core 1, The plurality of metal pieces 2 are twisted so as to gradually shift.

  Further, as another skewed stator manufacturing apparatus, as shown in FIG. 14, a helical twist guide is inserted into the slot opening of the stator core 1 by inserting a center post 8 into the inner periphery of the stator core 1 so as to be able to advance and retract. A manufacturing apparatus (for example, see Patent Document 2) in which the portion 8a is formed on the outer periphery of the center post 8 has also been proposed. In this skewed stator manufacturing apparatus, the coil 7 is inserted in a state where the slot is parallel to the axial direction of the stator core without twisting the magnetic metal piece of the stator core 1, and then the stator core 1 from one end face of the stator core 1. It is assumed that the skew center post 8 is inserted into the as shown by the solid line arrow. Then, the helical guide portion 8a formed on the skew center post 8 is inserted into the slot opening on the inner periphery of the stator core 1, and each magnetic metal piece constituting the stator core 1 is twisted by the helical guide portion 8a. To be skewed. Here, reference numeral 9 in FIG. 14 denotes a support 9 that supports the stator core 1 in which the coil 7 is inserted.

JP-A-11-225461 (paragraph numbers “0008” and “0009”) JP-A-11-299187 (paragraph numbers “0008”, “0009”)

  However, as shown in FIG. 12, in the manufacturing apparatus in Patent Document 1 in which the stator core 1 is twisted by rotating the plate 3 inserted into the notch 2a, the notches 2a formed on the outer periphery of the plurality of metal pieces 2 are As shown by the broken-line arrows in FIG. 13, the arc moves along the outer periphery of the metal piece 2 constituting the stator core 1. On the other hand, when the plate 3 inserted into the notch 2a is inclined with respect to the axis of the stator core 1, the plate 3 inserted into the notch 2a at the end of the stator core 1 is indicated by a solid arrow in FIG. Move linearly. For this reason, if the degree of twisting of the stator core 1 is increased, the initially inserted plate 3 will be disengaged from the notch 2a, and there is still a problem to be solved that there is a limit to increasing the degree of twisting. Remained.

  Further, in the manufacturing apparatus in Patent Document 2 in which the skew center post 8 shown in FIG. 14 is pushed to twist the stator core 1, the helical twist guide portion 8 a that actually skews is directly formed on the outer periphery of the center post 8. Therefore, in order to change the degree of twist, it is necessary to prepare another center post 8 having a helical twist guide portion 8a formed on the outer periphery to give a desired twist. It was difficult to change the degree.

  Further, after twisting the stator core 1, it is necessary to pull out the skew center post 8 from the stator core 1 as indicated by a broken line arrow. However, since the helical twist guide portion 8a that actually skews is formed directly on the outer periphery of the center post 8, the skewed stator core 1 or the skew center post 8 is rotated in accordance with the degree of twist. Otherwise, there is a problem that the center post 8 cannot be pulled out straight from the core 1. For this reason, a structure for rotating the stator core 1 or the skew center post 8 in accordance with the degree of twisting is newly required, and the problem to be solved still remains that the structure becomes complicated.

  Further, after the stator core 1 is twisted, it is necessary to join a plurality of magnetic metal pieces to each other by welding or the like in order to maintain the state. However, even in a stator core formed by laminating a predetermined number of magnetic metal pieces, if a gap is generated between the magnetic metal pieces, the thickness in the laminating direction varies. For this reason, even if a desired twist is given, it becomes difficult to obtain a skewed stator of uniform quality if a plurality of magnetic metal pieces are joined to each other in a state where the thickness varies in the stacking direction. There is. References 1 and 2 do not describe any means for suppressing variations in thickness when the stator core 1 is joined.

  An object of the present invention is to provide an apparatus for manufacturing a skewed stator in which the degree of twist can be freely adjusted and the thickness of the stator core in the stacking direction can be made uniform during joining.

  In the present invention, after inserting a coil into a slot parallel to the axial direction of a stator core formed by laminating a plurality of magnetic metal pieces having notches communicating with each other, each magnetic metal piece is gradually displaced in the circumferential direction. It is a manufacturing apparatus of the stator with a skew which gives a twist to.

  The characteristic configuration includes a base on which one end face of the stator core is placed, a pin that is detachably mounted on the base and that is tiltable and communicates in the axial direction of the stator core, and a pin that is inserted into the notch or slot. A plurality of struts erected on the base so as to surround the stator core from the periphery; a pressing member provided at an end of the plurality of struts and configured to abut against the other end surface of the stator core so as to press the stator core; and the stator core The operation member is located on the other end face side and the tip of the pin is locked, and the operation handle is provided on the operation member and rotates the operation member around the central axis of the stator core.

  This skewed stator manufacturing apparatus is inserted into the outer periphery of the stator core and inserted into the notch when the pin is erected so that the pin is inserted into the outer periphery of the stator core and communicated in the axial direction. It is preferable to further include a plurality of annular plates that prevent the pins from being removed from the notches, and it is more preferable that the annular plates are configured to be separable.

  Since the skewed stator manufacturing apparatus of the present invention includes a pin inserted into a notch formed on the outer periphery of the stator core or a slot on the inner peripheral side, when the operation handle is rotated, the pin is changed according to the amount of rotation. The magnetic metal piece tilted with respect to the base and having the pin inserted into the notch or slot is pushed by the pin and rotated. Thereby, twist can be imparted to the stator core. For this reason, the degree of twist can be adjusted by the amount of rotation of the operation handle, and the degree of twist can be freely adjusted.

  When a pin is inserted into a notch that is on the outer periphery of the stator core and communicates in the axial direction, the notch of each metal piece draws a gentle spiral after the stator core is twisted. Here, if a plurality of annular plates are fitted on the outer periphery of the stator core, the pins are prohibited from being detached from the notches by the plurality of annular plates. For this reason, it is possible to increase the degree of twist applied to the stator core as compared with the conventional case.

  On the other hand, in the skewed stator manufacturing apparatus of the present invention, the pressing member configured to press against the other end surface of the stator core so as to press the stator core is provided at the ends of the plurality of support columns standing on the base. After the stator core is twisted, the pressing member presses the stator core from the stacking direction so that the plurality of magnetic metal pieces constituting the stator core are brought into close contact with each other and no gap is generated between them. Then, the thickness of the stator core in the stacking direction matches the value obtained by multiplying the thickness of the magnetic metal piece by the number of the magnetic metal pieces, and the thickness in the stacking direction does not vary. In this state, a plurality of magnetic metal pieces are joined together by welding or the like, whereby a skewed stator having a uniform thickness in the stacking direction of the stator core can be obtained.

  In the skewed stator manufacturing apparatus according to the present invention, the pin that actually twists is detachably installed on the base, so that the stator core placed on the base and twisted is pressed from the stacking direction by the pressing member. In this state, the pin can be removed from the base. Therefore, it is not necessary to rotate the stator core or the center post when removing the stator core joined by twisting, and the structure is compared with the conventional device that needs to rotate the stator core or the center post when removing the stator core. It can be simplified.

It is a disassembled perspective view of the manufacturing apparatus of the skewed stator of this invention. It is a perspective view which shows the some annular plate provided in the manufacturing apparatus. It is a perspective view of the stator by which a core is twisted with the pin of the manufacturing apparatus. It is the sectional view on the AA line of FIG. It is sectional drawing corresponding to FIG. 4 which shows the relationship between the operation member, a pin, and a support | pillar. It is a longitudinal cross-sectional view containing the pin of the manufacturing apparatus. It is a front view which shows the state by which a stator is mounted | worn with the manufacturing apparatus. FIG. 8 is a view corresponding to FIG. 7 showing a state in which a plurality of annular plates are fitted into the stator and an operation member is mounted. FIG. 8 is a view corresponding to FIG. 7 showing a state in which the stator core is twisted by the operation member and the core is pressed by the pressing member. It is a figure corresponding to Drawing 7 showing the state where the twisted and pressed core is joined. It is a perspective view which shows another several division | segmentation annular plate of this invention. It is a conceptual diagram which shows the state which gives a skew to a core with the conventional manufacturing apparatus. It is the figure seen from the B direction of FIG. It is a conceptual diagram which shows the state which gives a skew with another conventional manufacturing apparatus.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 3, the skewed stator manufacturing apparatus of the present invention hangs an annular coil 20 on separate slots 14 parallel to the axial direction of the stator core 11 formed by laminating a plurality of magnetic metal pieces 16. It is an apparatus which twists so that each magnetic metal piece 16 may shift | deviate gradually in the circumferential direction, after inserting so that it may rotate.

  Here, the stator core 11 is made of a magnetic material including an annular portion 12 and a plurality of teeth 13 projecting from the inner peripheral surface of the annular portion 12 toward the center of the annular portion 12. A plurality of slots 14 for accommodating the stator coil 20 are formed between the teeth 13. In other words, the stator core 11 is of a laminated type configured such that a predetermined number of magnetic metal pieces 16 having a certain thickness provided with the annular portion 12 and the teeth 13 are stacked to have a predetermined thickness. And in this embodiment, the case where the notches 16a and 16b mutually aligned are formed in the outer periphery of the some magnetic metal piece 16 which comprises the stator core 11 is shown.

  Specifically, in this embodiment, as shown in FIGS. 3 to 5, eight notches 16a are radially formed from the center on the outer periphery of the magnetic metal piece 16, and one of the notches 16a is formed. The case where the reference notch 16b for positioning is further formed between the notch 16a and the notch 16a adjacent to it is shown. In the state where the magnetic metal pieces 16 are laminated so that the slots 14 are parallel to the axial direction of the core 11, the notches 16 a and 16 b are on the outer periphery of the stator core 11 and parallel to the axial direction of the stator core 11. It is formed so as to communicate.

  On the other hand, the stator coil 20 is manufactured in an annular shape separately from the stator core 11. Although not shown, the annular stator coil 20 can be manufactured by using a general winding machine using a winding core, and by winding a wire around the winding core a plurality of times, a stator coil having a desired size is produced. 20 can be obtained. The wire in this embodiment shows a case where the wire is a round wire with a circular cross section having an insulating film formed on the surface (FIGS. 4 and 5). However, the coil 20 may be a so-called square wire having a square cross section. When inserting the stator coil 20 into the stator core 11, an inserter device is used. As this inserter device, a general one can be used. When the coil 20 is accommodated in the slot 14, the annular coil 20 is inserted so as to hang around separate slots 14 parallel to the axial direction of the stator core 11. Is done. In this embodiment, FIG. 3 illustrates an example in which the coil 20 is inserted across the three teeth 13 so as to hang around the three teeth 13 in different slots 14.

  As shown in FIGS. 1 and 2, the skewed stator manufacturing apparatus 50 of the present invention includes a base 51 on which one end face of the stator core 11 (FIG. 3) is placed. The base 51 includes a substrate 52 in which mounting holes 52a (FIG. 2) are formed at four corners, and a plurality of mounting blocks 53 that are fixed to the substrate 52 and on which a lower surface that is one end surface of the stator core 11 is mounted. Is provided. The mounting blocks 53 are prepared in the same number or more as the number of the notches 16a. In the figure, a plurality of mounting blocks 53 prepared in the same number as the number of notches 16a are positions corresponding to the notches 16a of the stator core 11, and the ring portion 12 of the stator core 11 can be placed on the ring. It arrange | positions and it arrange | positions to the board | substrate 52 (FIG. 4).

  In the plurality of mounting blocks 53, a pedestal 53b for actually mounting the lower surface in the vicinity of the notch 16a of the stator core 11 protrudes upward, and the notch of the stator core 11 having the lower surface mounted on the pedestal 53b. In the mounting block 53 corresponding to 16a, a loose insertion hole 53a is formed adjacent to the base 53b. As shown in FIGS. 1 and 6, a pin 54 that can be inserted into the notch 16a of the stator core 11 is configured to be freely inserted into the loose insertion hole 53a. The pin 54 is made of a steel material that can be slightly elastically deformed, and is inserted with play in the loose insertion hole 53a. Therefore, the pin 54 can be removed from the base 51 and tilted. The base 51 is erected. Since the loose insertion hole 53a is provided at a position corresponding to the notch 16a, the pin 54 loosely inserted into the loose insertion hole 53a is located on the outer periphery of the stator core 11 and communicates in the axial direction of the stator core 11. (FIGS. 4 to 6). The pin 54 is inserted into the notch 16 a of the stator core 11 whose lower surface is mounted on the plurality of mounting blocks 53 and the lower part is inserted into the loose insertion hole 53 a, and the upper end of the pin 54 is higher than the upper surface of the stator core 11. The thing of the length which protrudes upwards is used (FIG. 6).

  Returning to FIG. 1 and FIG. 2, in the skewed stator manufacturing apparatus 50 of the present invention, a plurality of support posts 55 are erected on the base 51 so as to surround the stator core 11 from the periphery. In this embodiment, a case where eight struts 55 equal to the number of pins 54 are used is shown. As shown in FIGS. 4 to 6, the eight pillars 55 have a circular cross section, and a plurality of mountings which are the base 51 so as to surround the stator core 11 with a slight gap from the periphery. Standing on the pedestal 53 b of the mounting block 53. The column 55 has such a length that its upper end protrudes upward from the upper surface of the stator core 11 on which the lower surfaces are mounted on the plurality of mounting blocks 53 (FIG. 6). In addition, this support | pillar 55 is not restricted to a thing with a circular cross section, The cross section may be a square shape and may comprise polygons, such as a triangle and a pentagon.

  As shown in FIGS. 2 and 7, on the substrate 52, the reference plate 58 is positioned at a position corresponding to the reference notch 16 b of the stator core 11 in a state where the lower surface of the stator core 11 is placed on the plurality of placement blocks 53. Is detachably installed. 2 and 7, the fixture 58a is screwed to the substrate 52, and the reference plate 58 is fixed to the fixture 58a. For this reason, the reference | standard board 58 is standingly installed so that it can be removed to the board | substrate 52 via this fixture 58a. The reference plate 58 is provided so as to extend in the vertical direction from the substrate 52 so as to be parallel to the axial direction of the stator core 11 mounted on the plurality of mounting blocks 53, and communicates in parallel with the axial direction of the stator core 11. The slot 14 of the stator core 11 that enters the reference notch 16 b and is placed on the plurality of placement blocks 53 is formed to be parallel to the axial direction of the core 11.

  As shown in FIGS. 2 and 4, this device 50 includes a plurality of annular plates 61 that prevent the pins 54 inserted into the outer periphery of the stator core 11 from being inserted into the notches 16 a of the core 11 from the notches 16 a. Is provided. In this embodiment, five annular plates 61 having the same shape and the same size are used, and each annular plate 61 has an inner diameter slightly larger than the outer diameter of the stator core 11, so as to avoid interference with the plurality of support columns 55. A plurality of recesses 61a are formed from the inner periphery toward the outer periphery. These annular plates 61 are connected to each other at a predetermined interval in the axial direction via a connecting member 62, and the inner periphery of the annular plate 61 is inserted into the outer periphery of the stator core 11 as shown in FIG. The pin 54 inserted into the notch 16a is moved toward the outer periphery of the core 11 and is separated from the notch 16a. Then, the connecting member 62 is configured to be removable from the annular plate 61, and the plurality of annular plates 61 that are disconnected from each other by removing the connecting member 62 are brought into close contact with each other as shown in FIG. It is configured to be stackable.

  As shown in FIGS. 2 and 4 to 6, the substrate 52 in the base 51 is detachably provided with a center post 63 that is inserted with a slight gap on the inner periphery of the stator core 11. The center post 63 in this embodiment includes a lower plate 63a placed on the substrate, an upper plate 63b positioned above the upper surface of the stator core 11 placed on the base 51, and the lower plate 63a and the upper plate 63b. And a plurality of connecting rods 63c to be connected. The upper plate 63b and the lower plate 63a are circular plate members having an outer diameter slightly smaller than the inner diameter of the stator core 11, and the plurality of connecting rods 63c are arranged around the upper and lower plates 63a and 63b so as to be inscribed in the outer diameter. It arranges radially from the center of the upper and lower plates 63a, 63b (FIGS. 4 and 5). As shown in FIG. 6, both ends of the connecting rod 63c are fixed to the upper plate 63b and the lower plate 63a by a small screw 63f. The lower plate 63a is formed with a lower central hole 63e at the center thereof, and the substrate 52 facing the lower central hole 63e is formed with a lower protrusion 52b that can be inserted into the lower central hole 63e. The center post 63 is placed on the substrate 52 so that the lower protrusion 52b is inserted into the lower center hole 63e, so that the center post 63 is positioned at the center of the stator core 11 placed on the base 51. The

  As shown by the solid line in FIG. 1 and the one-dot chain line in FIG. 5, the device 50 includes an operation member 67 that is located on the other end face side of the stator core 11 and that engages the tip of the pin 54. The operating member 67 includes an annular portion 67a that surrounds the plurality of support posts 55, and a protruding portion 67b that protrudes from the inner peripheral surface of the annular portion 67a toward the center of the annular portion 67a. The projecting portion 67b is formed with a through hole 67c into which a pin 54 inserted through the notch 16a of the stator core 11 and projecting upward from the upper surface of the core 11 can be loosely inserted.

  As shown in FIGS. 1 and 6, an operation handle 69 parallel to the operation member 67 is fixed to an annular portion 67 a of the operation member 67 via a boss 68. The operation handle 69 shown in the drawing has a substantially cross shape in which a long rod-shaped member 71 and a short rod-shaped member 72 intersect at the center, and a protrusion 69a (FIG. 6) is provided at the intersecting center. On the other hand, an upper center hole 63d through which the protrusion 69a (FIG. 6) is inserted is formed at the center of the upper surface of the center post 63, and gripping portions 69b that are held by the operator's hands are formed at both ends of the long rod-shaped member 71. Is done. Then, the operator holds the grip portion 69b of the long rod-like member 71 of the operation handle 69 in which the projection 69a is inserted into the upper center hole 63d, and rotates the projection 69a as the center of rotation, thereby rotating the center of the stator core 11. The operation member 67 is configured to be rotatable about the shaft.

  Female screw holes 55a are respectively formed at the upper ends of the plurality of support posts 55 standing on the base 51, and the upper ends of the support posts 55 are in contact with the other end face of the stator core 11 so that the stator core 11 can be pressed. The pressed member 56 is provided. As shown in the enlarged sectional views of FIGS. 1 and 10, the pressing member 56 in this embodiment has a rectangular parallelepiped outer shape, and an entrance hole 56a into which the upper end portion of the column 55 can be inserted on the central axis thereof. Then, the insertion hole 56b into which the male screw 57 can be inserted is continuously formed coaxially. In a state where the upper end portion of the support column 55 is inserted into the entry hole 56 a of the pressing member 56, the pressing member 56 is configured such that a part of the lower surface thereof comes into contact with the other end surface of the stator core 11. The male screw 57 inserted into the insertion hole 56b of the pressing member 56 is screwed into the female screw hole 55a, thereby pressing the pressing member 56 whose lower surface is in contact with the other end surface of the stator core 11 to the base 51 side. The stator core 11 is configured to be pressed. The pressing member 56 is not limited to a rectangular parallelepiped shape. As long as the stator core 11 can be pressed by screwing the male screw 57 inserted into the insertion hole 56b into the female screw hole 55a, the shape of the pressing member 56 may be a shape other than a rectangular parallelepiped, for example, a cube. It may be a columnar shape.

  Next, a procedure for twisting (skewing) the stator core 11 in which the coil 20 is inserted will be described using the manufacturing apparatus 50 described above.

  First, as shown in FIG. 7, this apparatus 50 is used with its base 51 fixed to a work table 82 by bolts 81 inserted into the mounting holes 52a (FIG. 2). The stator core 11 in which the coil 20 is inserted is lowered from above the space surrounded by the plurality of support columns 55, and the lower end surface of the stator core 11 is placed on the mounting block 53 in the base 51, specifically, the mounting block 53. Place on the pedestal 53b. At this time, a reference plate 58 provided extending in the vertical direction from the substrate 52 is caused to enter a reference notch 16 b formed on the outer periphery of the stator core 11. In this way, the stator core 11 is placed on the base 51, and the reference plate 58 makes the slot 14 of the stator core 11 parallel to the axial direction of the core 11, and serves as a reference for twisting the core 11.

  Thereafter, the center post 63 is inserted in the center of the stator core 11, and the lower end thereof is installed in the center of the substrate 52. Then, as shown in FIG. 6, the center post 63 is placed on the substrate 52 so that the lower protrusion 52b of the substrate 52 is inserted into the lower center hole 63e of the center post 63, and the center post 63 is placed on the base 51. It is located at the center of the stator core 11. In this way, the center post 63 makes the central axis of the stator core 11 placed on the base 51 straight in the vertical direction, and the slot 14 is directed in the vertical direction parallel to the axial direction of the core 11. Thereafter, by removing the fixture 58a from the substrate 52, the reference plate 58 used as a reference when twisting the core 11 is removed from the substrate 52 together with the fixture 58a.

  Thereafter, as shown in FIGS. 4 and 8, the five annular plates 61 connected by the connecting member 62 are fitted into the stator core 11. 6 and 8, the operation handle 69 is placed on the center post 63 so that the protrusion 69a is inserted into the upper center hole 63d. Then, the through hole 67 c in the operation member 67 fixed to the operation handle 69 through the boss 68 is opposed to the notch 16 a on the outer periphery of the stator core 11. After that, as shown in FIG. 6, the pin 54 is inserted into the loose insertion hole 53 a and further inserted into the notch 16 a that is on the outer periphery of the stator core 11 and continues parallel to the axial direction of the core 11. At this time, the notch 16a is formed by the reference plate 58 so as to be continuous in parallel with the axial direction of the core 11, so that the pin 54 can be inserted into the notch 16a relatively easily. Then, the lower end of the pin 54 is inserted into the loose insertion hole 53 a of the mounting block 53. In this manner, the pins 54 are erected on the base 51 while preventing the pins 54 from being detached from the notches 16 a by the plurality of annular plates 61.

  In this state, the operator holds the grip portions 69b at both ends of the operation handle 69 with his / her hands, and rotates the operation handle 69 around the central axis of the stator core 11 as indicated by the solid line arrow in FIG. Then, the pin 54 tilts with respect to the base 51, and the magnetic metal piece 16 having the pin 54 inserted through the notch 16a is pushed by the pin 54 around the center post 63, as shown in FIG. Thus, the twisting action is applied to the magnetic metal piece 16, and the skewed stator 10 can be obtained. Therefore, a twist corresponding to the rotation angle of the operation member 67 is applied to the stator core 11, and in this device 50, the degree of twist of the stator core 11 can be easily adjusted by adjusting the rotation angle of the operation member 67. it can.

  When the stator core 11 is twisted, the notches 16a of the metal pieces 16 are connected in a gentle spiral. However, in this embodiment, since the plurality of annular plates 61 that prevent the pins 54 inserted through the notches 16a from being detached from the notches 16a are fitted into the stator core 11, the pins 54 have a plurality of annular shapes. It is prohibited by the plate 61 to leave the notch 16a. For this reason, the pin 54 is gently elastically deformed along the notches 16a connected so as to draw a spiral, and does not detach from the notches 16a. Therefore, this pin 54 reliably rotates each magnetic metal piece 16, and uses the plate 3 to be detached from the notch 16a to twist the stator core 11 as compared with the conventional apparatus shown in FIG. Thus, the device 50 can increase the degree of twist, and can impart a relatively large twist to the stator core 11.

  After the stator core 11 is twisted at a desired angle, the twisted stator core 11 is pressed by the pressing member 56. Specifically, as shown in the enlarged sectional view of FIG. 10, the upper end portion of the support column 55 is inserted into the entry hole 56 a of the pressing member 56, and a part of the lower surface of the pressing member 56 is placed on the other end surface of the stator core 11. Make contact. Then, the male screw 57 inserted into the insertion hole 56b of the pressing member 56 is screwed into the female screw hole 55a, and the pressing member 56 whose lower surface is in contact with the other end surface of the stator core 11 is pressed against the base 51 side. Thus, the stator core 11 is pressed, the magnetic metal piece 16 and the magnetic metal piece 16 which comprise the stator core 11 are closely_contact | adhered, and a clearance gap is not produced between them. Then, the thickness of the stator core 11 in the stacking direction is made to coincide with the value obtained by multiplying the thickness of the magnetic metal piece 16 by the number thereof.

  Thus, after twisting the stator core 1 and bringing the magnetic metal piece 16 and the magnetic metal piece 16 into close contact with each other, the plurality of magnetic metal pieces 16 are joined to each other. As shown in FIG. 10, when the stator core 11 is joined, the operation member 67 is removed together with the operation handle 69, and the pin 54 that is twisted to the stator core 11 is also removed. Since the pins 54 are detachably provided on the base 51, they can be removed even after the stator core 11 is twisted. And the connection by the connection member 62 is cancelled | released, the some annular plate 61 is piled up mutually, and the outer periphery of the stator core 11 is exposed. In this embodiment, a case where a plurality of magnetic metal pieces 16 are welded is shown, and a part of the outer periphery of the stator core 11 exposed by overlapping a plurality of annular plates 61 is welded in the stacking direction. Here, reference numeral 83 in FIG. 10 indicates a welding rod 83 used for welding the stator core 11. Thus, even when a plurality of annular plates 61 that prevent the pins 54 from being removed from the notches 16a are used, the outer periphery of the stator core 11 can be exposed by overlapping the annular plates 61. The plurality of annular plates 61 do not become an obstacle in joining the stator core 11. Since the mounting block 53 is formed with a pedestal 53b on which the lower end surface of the stator core 11 is mounted, the lower end surface of the stator core 11 other than the portion actually mounted on the pedestal 53b is in the air. Will be in a floating state. For this reason, even if the outer periphery of the stator core 11 in the vicinity of the mounting block 53 is welded, the welding rod 83 can be prevented from coming into contact with the mounting block 53. It is possible to reliably weld up to the end face.

  In this manner, the stator core 1 is twisted, and the magnetic metal piece 16 and the magnetic metal piece 16 are brought into close contact with each other to obtain the skewed stator 10 (FIG. 3B). The stator 10 is then removed from the device 50. In removing the skewed stator 10, the male screw 57 is first removed from the female screw hole 55 a, and then the pressing member 56 is removed from the support column 55 to release the pressing of the stator core 11 by the pressing member 56. Then, the skewed stator 10 surrounded by the plurality of support posts 55 is pulled out from the device 50 so as to be lifted upward. Therefore, it is not necessary to rotate the stator core 11 or the center post 63 when removing the twisted stator core 11, and it is necessary to rotate the stator core 1 or the center post 8 when removing the stator core 11 shown in FIG. The structure can be simplified compared to

  In the skewed stator 10 (FIG. 3 (b)) manufactured by the apparatus 50 of the present invention, the stator core 11 is skewed, so that the magnetic metal piece 16 is gradually displaced and has the teeth 13 inclined obliquely. In the teeth 13 to be engaged with each other, one upper end is very close to the other lower end along the circumferential direction, whereby the rotation of a rotor (not shown) can be made smooth.

  The core 11 is formed by laminating a predetermined number of magnetic metal pieces 16, but is joined to each other with no gap formed between the magnetic metal pieces 16 and the magnetic metal pieces 16. 11 does not vary in thickness in the stacking direction. That is, the male screw 57 inserted into the insertion hole 56b of the pressing member 56 is screwed into the female screw hole 55a, thereby pressing the pressing member 56 whose lower surface is in contact with the other end surface of the stator core 11 to the base 51 side. The outer periphery of the stator core 11 is welded in the axial direction. Therefore, by managing the force with which the male screw 57 is screwed into the female screw hole 55a, an appropriate pressure can be applied to the laminated stator core 11. In this state, the outer periphery of the stator core 11 is welded in the axial direction. The thickness of 11 in the stacking direction is a value obtained by multiplying the thickness of the magnetic metal piece 16 by the number of the magnetic metal pieces 16, and there is no variation in the thickness of the stator core 11 in the stacking direction. Therefore, when the skewed stator 10 having the stator core 11 formed by laminating a predetermined number of magnetic metal pieces 16 having the same thickness is manufactured by the apparatus 50 of the present invention, the stator core 11 having the same thickness is always obtained. It becomes. That is, in the device 50 of the present invention, the degree of twist can be adjusted freely, and the thickness in the stacking direction of all the stator cores 11 formed by stacking a predetermined number of magnetic metal pieces 16 can be made uniform. Become.

  In the above-described embodiment, the case where the plurality of annular plates 61 are connected to each other with a predetermined interval in the axial direction via the connecting member 62 has been described. However, the annular plate 61 is configured to be separable. Also good. For example, an example is shown in FIG. The annular plate 61 shown in FIG. 11 is composed of a pair of circular arc members 61b and 61c that are attached together, and one end of the pair of arc members 61b and 61c is overlapped and pivotally supported. The other ends of the pair of arc members 61b, 61c are respectively formed with communication holes 61d that pass through each other in a superimposed state, and the communication holes 61d at the other ends of the pair of arc members 61b, 61c that are pivotally supported at one end. Are communicated with each other to form an annular plate 61 and prevent the pin 54 inserted into the notch 16a from being detached from the notch 16a when fitted into the outer periphery of the stator core 11. Configured. And the annular plate 61 which consists of such a pair of circular arc members 61b and 61c is connected through the connection member 62 at predetermined intervals in the axial direction.

  In the annular plate 61 configured to be separable as shown in FIG. 11, the pair of arc members 61b and 61c are formed into an annular shape, and the communication holes 61d at the other ends of the pair of arc members 61b and 61c supported at one end are formed. The other end of the pair of arc members 61b and 61c pivotally supported at one end is prevented from opening each other by communicating with each other and inserting the locking pin 84 into the communication hole 61d in this state. The Then, by inserting a plurality of annular plates 61 into the outer periphery of the stator core 11 with the other ends being prevented from opening to each other, the inner periphery approaches the outer periphery of the core 11 and twists the stator core 11. It is possible to prevent a situation in which the pin 54 is detached from the notch 16a.

  On the other hand, after the stator core 1 is twisted, the plurality of magnetic metal pieces 16 are joined to each other, but at this time, the latches inserted into the communication holes 61d at the other ends of the pair of arc members 61b and 61c, respectively. By pulling out the pin 84 and opening the other ends of the pair of arc members 61b and 61c whose one ends are pivotally supported as indicated by broken line arrows, the stator core 11 can be extracted from between the released other ends. . In this way, by removing the plurality of annular plates 61 including the pair of arc members 61b and 61c from the stator core 11, the outer periphery of the stator core 11 is exposed, and a part of the outer periphery of the exposed stator core 11 is welded in the stacking direction. can do. Therefore, it can be easily avoided that the plurality of annular plates 61 become an obstacle in joining the stator core 11.

  In the above-described embodiment, the upper plate 63b, the lower plate 63a, and the plurality of connecting rods 63c that connect the upper plate 63b and the lower plate 63a are provided, and a space is formed between the plurality of connecting rods 63c. Although the relatively lightweight center post 63 has been described, the center post may be a solid column having a column shape as long as the weight does not hinder the work.

  In the above-described embodiment, the manufacturing apparatus 50 for rotating the operation handle 69 in which the protrusion 69a is inserted into the upper center hole 63d of the center post 63 has been described. However, the operation member 67 is set with the central axis of the stator core 11 as the rotation center. The center post 63 may not be provided as long as the center post 63 can be rotated.

  Further, in the above-described embodiment, the notch 16a communicating with each other is formed on the outer periphery of the stator core 11, and the manufacturing apparatus 50 including the pin 54 inserted into the notch 16a has been described. The pins may be inserted into slots 14 that are in the inner periphery of the stator core 11 and communicate with each other in the axial direction of the stator core 11.

DESCRIPTION OF SYMBOLS 11 Stator core 14 Slot 16 Magnetic metal piece 16a Notch 20 Coil 50 Skewed stator manufacturing apparatus 51 Base 54 Pin 55 Strut 56 Press member 61 Annular plate 67 Operation member 69 Operation handle

Claims (2)

After inserting the coil (20) into the axially parallel slot (14) of the stator core (11) formed by laminating a plurality of magnetic metal pieces (16) having notches (16a) communicating with each other, In the manufacturing apparatus of the skewed stator that twists so that each magnetic metal piece (16) gradually shifts in the circumferential direction,
A base (51) on which one end face of the stator core (11) is placed;
A pin (54) inserted into the notch (16a) that is detachably mounted on the base (51) and tiltable so as to be connected to the outer periphery of the stator core (11) in the axial direction ;
A plurality of pillars (55) erected on the base (51) so as to surround the stator core (11) from the surroundings;
A pressing member (56) provided at an end of the plurality of support columns (55) and configured to press the stator core (11) by contacting the other end surface of the stator core (11);
An operation member (67) located on the other end face side of the stator core (11) and having the tip of the pin (54) locked thereon;
An operation handle (69) that is provided on the operation member (67) and rotates the operation member (67) around the center axis of the stator core (11) ;
A skew provided with a plurality of annular plates (61) for preventing the pin (54) inserted into the outer periphery of the stator core (11) and inserted through the notch (16a) from the notch (16a). A stator manufacturing device. The apparatus for manufacturing a skewed stator according to claim 1, wherein the annular plate (61) is configured to be separable.

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