JP5530121B2 - Stator coil, manufacturing method thereof and winding machine - Google Patents

Description

The present invention relates to a stator coil used for a rotating electrical machine. More particularly, the present invention relates to a wave-winding stator coil in which a coil side portion inserted into a slot of a stator core and a coil end portion protruding from the slot are alternately formed, a manufacturing method thereof, and a winding machine .

  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 assembled to the core. Regarding the assembly of the stator coil, a so-called inserter method is known in which the stator coil is manufactured in advance separately from the stator core, and then this coil is accommodated in each slot of the core. And in the winding system of the coil used for this inserter method, the wave winding system (for example, refer patent document 1) which winds a wire so that it passes along the upper and lower sides of each teeth alternately is known. .

  In the wave winding method in the cited document 1, a wave winding coil manufacturing apparatus is used in which the same number of inner jigs and outer jigs as teeth move radially. In the manufacturing apparatus, first, the inner jig is annularly arranged, and the outer jig is arranged annularly on the outer side. Then, a circular coil is formed by winding a wire rod around a plurality of inner jigs arranged in a ring by a predetermined number of turns. Thereafter, as shown in FIG. 12, the inner jig 2 and the outer jig 3 are moved radially, and the outer jig 3 is moved to the inner side of the circle drawn by the plurality of inner jigs 2. A coil wound in a circle around the inner jig 2 is formed into a star shape. The star-shaped wave winding coil 4 thus formed is then pushed into a slot between the core teeth by using an inserter (not shown), thereby forming a stator.

  On the other hand, since the rotor is inserted into this stator, it is necessary to prevent the coil end portion of the coil protruding from the axial end surface of the stator core from entering the inner peripheral surface of the stator core without being accommodated in the slot. There is. If the rotating electrical machine is of a three-phase type, three-phase stator coils are assembled to a single stator core. For this reason, in a three-phase rotating electrical machine, coil end portions for three phases protruding from the slots of the respective phase coils overlap each other. Taking this into consideration, a relief molding is performed in which the coil end protruding from the slot of the stator coil assembled first in the past is released to the outer diameter side of the stator core, and then another stator coil is inserted into the slot. ing. Then, after assembling the stator coils for three phases to a single stator core, finish molding is performed to release the entire coil end portion of each phase coil to the outer diameter side again, and the coil end portions of all three phase coils are the stator core It is prevented from entering inside from the inner peripheral surface.

  Here, the star-shaped wave coil 4 shown in FIG. 12 connects a straight coil side portion 4c inserted into a slot of the stator core and ends of the coil side portion 4c from the end surface in the axial direction of the stator core. It can be classified into protruding arc-shaped coil end portions 4a and 4b. Then, in this star-shaped wave winding coil 4, all the coil side portions 4c have the same length, and all have the same shape even in the coil end portions 4a and 4b. For this reason, in order to avoid the coil end portions 4a and 4b from overlapping in the radial direction of the core, in the escape molding, as shown by a one-dot chain line in FIG. 11, the end surfaces of the cores 6 of the coil end portions 4a and 4b Conventionally, the amount of protrusion from each other is made different sequentially. Then, the coil end portions 4a and 4b do not overlap in the radial direction of the core, and the coil end portions 4a and 4b overlap each other in the axial direction of the core 6 in escape molding as shown by the solid line in FIG. Therefore, both of the coil end portions 4 a and 4 b can escape to the outer diameter side of the stator core 6.

JP-T-2001-513320

  However, since the lengths of the coil side portions 4c adjacent to each other in the radial direction of the core 6 are equal to each other, the coil end portion 4b protruding from one end surface 6b of the core 6 (the lower surface in FIG. When the protrusion amount is decreased according to the inner diameter side, the protrusion amount of the coil end portion 4a protruding from the other end face 6a (the upper surface in FIG. 11) of the core 6 increases from the outer diameter side of the core 6 toward the inner diameter side. Become. Therefore, even if the coil end portion 4b protruding from one end surface 6b (the lower surface in FIG. 11) can escape to the outer diameter side, the coil protruding from the other end surface 6a (the upper surface in FIG. 11) of the core 6 The entire end portion 4a is closer to the inner diameter side of the stator core 6 from the beginning, and the coil end portion on the inner diameter side does not enter the core side of the coil end portion on the outer diameter side in escape molding. For this reason, the coil end portion 4a existing inside cannot be overlapped in the axial direction of the coil end portion 4a on the outer diameter side and the core 6 unless a relatively large arc is drawn, and the entire coil end portion 4a is not provided. It has been difficult to sufficiently escape the stator core 6 to the outer diameter side of the stator core 6. And when the part which draws this comparatively big circular arc remains in the core inner diameter side end surface, the malfunction which interferes with the coil end part in the other stator coil assembled | attached later remained.

  In order to avoid interference with the coil end portion 4a that draws this relatively large arc, the coil end portion of the other stator coil protrudes relatively large from the end portion 6a of the core 6, and the relatively large arc is drawn. Although it is necessary to exceed the coil end portion 4a, if the coil end portion 4a is protruded relatively large from the end portion 6a of the core as described above, the wire 4 for manufacturing the coil 4 is enlarged because the other coil 4 is enlarged. There was a problem that the total length of the increased. When the coil 4 is increased in size in this way, so-called copper loss in the coil 4 is increased, and the efficiency of the rotating electrical machine using the coil 4 is deteriorated, and the outer shape of the rotating electrical machine is increased in size.

  Further, in the conventional method, the wave winding coil 4 formed into a star shape as shown in FIG. 12 is pushed into the slots between the core teeth using an inserter (not shown), so that a plurality of coil sides in the plane The parts 4c stand up at that time and become parallel to each other. That is, since the inserter device (not shown) changes the direction of the plurality of coil side portions 4c in the plane to a substantially right angle and stands up, the angle of the change is relatively large, and the coil 4 is configured when standing up. There was also a possibility of damaging the wire. Such damage may increase further if the wire constituting the wave winding coil 4 is thick.

  An object of the present invention is to provide a stator coil capable of improving the space factor of the coil end portion in the vicinity of the core end surface while avoiding interference of the coil end portion and reducing the protruding amount, and a method for manufacturing the stator coil.

  Another object of the present invention is to provide a stator coil and a method for manufacturing the same that can reduce damage caused during assembly.

  The stator coil of the present invention is a unit wave winding coil that is formed in a circumferential direction so that a coil side portion inserted into a slot of a stator core and a coil end portion protruding from an end surface in the axial direction of the stator core are alternately formed in the circumferential direction. Are continuously formed in the radial direction.

Its characteristic configuration is one coil side portions of the other unit wave wound coils which are adjacent to the outer peripheral side of the first unit wave wound coil from the coil side portions of the unit wave wound coil is rather long, the coil sides of the unit wave wound coil The diameter of the circle drawn by the coil end portion at one end of the coil portion is different from the diameter of the circle drawn by the coil end portion at the other end of the coil side portion so that the coil side portion follows the conical surface. in the place it was.

In the stator coil manufacturing method of the present invention, a plurality of first locking members are annularly arranged with a predetermined interval, and a plurality of second locking members are opposed to each other with a predetermined interval between the first locking members. The members are arranged in a ring shape, and the plane including the plurality of first locking members arranged in a ring and the plane including the plurality of second locking members arranged in a ring are parallel to each other with a predetermined interval therebetween. The wire is wound around the first locking member and the second locking member, and the wire is wound around the first locking member and the second locking member. This is a method of obtaining a stator coil in which coil side portions and coil end portions made of wire rods extending along the circumferential direction are wound alternately around first and second locking members.

The characteristic point is that the diameter of the circle drawn by the plurality of first locking members arranged in a ring is different from the diameter of the circle drawn by the plurality of second locking members arranged in a ring, The diameter of the circle drawn by the coil end at one end of the coil side is different from the diameter of the circle drawn by the coil end at the other end of the coil side so that the coil side runs along the conical surface. is there.

  In this manufacturing method, one or both of the first and second locking members are arranged such that the distance between the hanging surface of the first locking member and the hanging surface of the second locking member is expanded radially outward. From the coil side part of one unit wave winding coil which makes the winding surface meander and turns the meandering wire alternately wound around the first locking member and the second locking member for two or more turns. It is preferable to lengthen the coil side part of the other unit wave winding coil which makes a round adjacent to the outer peripheral side of the unit wave winding coil.

The winding machine of the present invention includes a main body with a built-in motor, a rotating shaft that can be rotated by the motor, a nozzle shaft that can be projected and retracted provided with a nozzle for feeding out the wire, and a state in which the rotating shaft is spaced apart from the rotating shaft. The first and second disks mounted in parallel with each other, and a plurality of first locking members and second members arranged annularly around the first and second disks with a predetermined interval around each of the first and second disks. A locking member, and a hanging portion that protrudes outward from the outer periphery of the first and second disks formed on the first and second locking members, and the second locking member is positioned between the first locking members. Are arranged opposite to each other, the hanging portions are formed thicker from the outer periphery of the first and second disks toward the outside, and the nozzle has a tip between the first locking member and the second locking member. The outer diameter of the first disk is different from the outer diameter of the second disk. So, the rotation shaft, when was infested nozzle axis, characterized in that inclined to and is fixed to the end of the nozzle passes through the vicinity of the outer circumference of the hanging turning portion.
In this case, the predetermined interval between the first disk and the second disk mounted in parallel is preferably substantially equal to the length of the coil side portion of the stator coil.

  In the stator coil of the present invention, the coil side portions of other unit wave winding coils adjacent to the outer peripheral side of one unit wave winding coil are made longer than the coil side portions of one unit wave winding coil. Thus, the coil end portions projecting from both end faces of the core are inclined with their projecting amounts decreasing from the outer diameter side to the inner diameter side of the core. Then, the entire coil end portion is closer to the outer diameter side of the stator core from the beginning, and when these coil end portions are pushed outward in the radial direction of the core, the inner coil end portion is moved to the outer diameter side. The coil end portion enters the core side, so that the entire coil end portion can be relatively easily released to the outer diameter side of the stator core. Therefore, the coil end part of the coil that is first assembled is pushed outward in the radial direction, and the coil end part of another coil that is subsequently assembled is routed and installed in that space, so that the vicinity of the end face of the core The space factor of the coil end part in space can be improved.

  In addition, when the coil is assembled, the coil sides stand upright and become parallel to each other. However, if the circle drawn by the coil end at the end of the coil side is made different so that the coil side follows the conical surface. Compared with the conventional method in which the coil side portion in the plane is turned to a substantially right angle to stand up, the angle at which the coil side portion changes is relatively small, and the damage to the coil side portion can be reduced. . Even if the wire is thick, damage is reduced, so that the reliability of the rotating electrical machine using this coil can be significantly increased. And in the manufacturing method of this invention, such a stator coil can be manufactured comparatively easily.

It is the sectional view on the AA line of FIG. 3 where the stator coil of this invention was assembled | attached to the core. It is a perspective view of the coil. It is the perspective view which assembled | attached the coil to the core. FIG. 4 is a perspective view corresponding to FIG. 3 in which coils for three phases are assembled to a core. It is the BB sectional view taken on the line of FIG. It is a cross-sectional block diagram of the inserter apparatus which assembles | attaches the coil to a core. It is a side view of the winding machine which has the winding jig | tool for obtaining the coil. It is a top view of the winding jig. It is a figure which shows the state by which the wire rod was wound around the 1st latching member. It is a figure which shows the state by which the wire rod was wound around the 2nd latching member. It is sectional drawing corresponding to FIG. 1 which shows the conventional coil. It is a perspective view of the conventional coil.

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

  FIG. 4 is a perspective view of the stator 10 obtained by assembling the stator coil 20 of the present invention to the stator core 11. 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 coil side portions 21a (to be described later) of the stator coil 20 are formed therebetween. The stator core 11 in this embodiment is a laminated type constituted by laminating and fixing a core plate having a shape having an annular portion 12 and teeth 13 having a constant thickness so as to have a predetermined thickness. Show.

  The stator coil 20 of the present invention is before being assembled to the core 11 and includes a plurality of unit wave winding coils 21 continuously formed in the radial direction as shown in FIG. The unit wave winding coil 21 includes a straight coil side portion 21 a inserted into the slot 14 of the stator core 11, and coil end portions 21 b and 21 c that protrude from the axial end surface of the stator core 11 and extend along the circumferential direction of the stator core 11. They are alternately formed in the circumferential direction and make a round. The stator coil 20 in which a plurality of such unit wave winding coils 21 are continuous in the radial direction is made by bending, bending and stretching a single wire 17 (FIG. 7). The wire 17 in this embodiment is The case where the surface is a round wire having a circular cross-section with an insulating film formed on the surface is shown.

  Further, the stator coil 20 in this embodiment includes a diameter of a circle C drawn by the coil end portion 21b at one end of the coil side portion 21a of the unit wave winding coil 21, and the other end portion of the coil side portion 21a. Are formed so that the diameters of the circles D drawn by the coil end portions 21c are different. This means that in the unit wave winding coil 21 having the coil side portion 21a and the coil end portions 21b and 21c continuous at both ends thereof, all the wires 17 are along a single conical surface. Specifically, in the case of the unit wave winding coil 21 located on the outermost periphery, when the lower coil end portion 21c in FIG. 2 imagines a cone indicated by a one-dot chain line around the bottom surface, the coil side portion 21a Along the straight line connecting the apex T of the cone and a point around the bottom surface, the coil end portion 21c at the other end of the coil side portion 21a is along a circle D on the outer periphery of the bottom surface, and one of the coil side portions 21a The coil end portion 21b at the end is formed so that a virtual plane parallel to the bottom surface between the bottom surface and the apex T is drawn along a circle C drawn intersecting the conical surface.

  And the characteristic structure of the stator coil 20 of the present invention is that the other unit wave winding coil 21 adjacent to the outer peripheral side of the one unit wave winding coil 21 from the coil side portion 21a of the one unit wave winding coil 21. The coil side portion 21a is long. That is, as shown in detail in FIG. 1, when this coil side portion 21 a is inserted into the slot 14 of the stator core 11, the coil end portions 21 b and 21 c protruding from both end faces of the core 11 are changed from the outer diameter side to the inner diameter side. Accordingly, the lengths of the coil side portions 21a on the outer diameter side and the inner diameter side are different so that the amount of protrusion decreases.

  Further, since the stator coil 20 includes a plurality of unit wave winding coils 21 that are continuous in the radial direction, as shown in FIG. 2, one unit of the unit coil windings 21 b and 21 c of the one unit wave winding coil 21. The coil end portions 21b and 21c of other unit wave winding coils 21 adjacent to the outer peripheral side of the wave winding coil 21 are formed long, and are radially formed between the slot 14 and the slot 14 into which the coil side portion 21a is inserted. By adapting the lengths of the coil end portions 21 b and 21 c to the distance, the coil side portion 21 a can be easily inserted into the slot 14.

  Next, the manufacturing method of the present invention for obtaining such a stator coil will be described.

  FIG. 7 shows a winding machine 30 for obtaining the stator coil 20. The winding machine 30 is provided with a winding jig 40 including a plurality of first locking members 41 and a plurality of second locking members 42. As shown in FIGS. 7 and 8, the plurality of first locking members 41 are annularly arranged with a predetermined interval, and the plurality of second locking members 42 are also annularly arranged with a predetermined interval. . The plane including the plurality of first locking members 41 arranged in an annular shape and the plane including the plurality of second locking members 42 arranged in an annular shape are parallel to each other at a predetermined interval, and the first engagement thereof. The first and second locking members 41, 42 are arranged so that the plurality of second locking members 42 face each other with a predetermined interval between the locking members 41. The first and second locking members 41 and 42 are determined such that the sum thereof is the same as the number obtained by dividing the number of teeth 13 of the stator core 11 by the number of coils 20 incorporated in the single core 11. In this embodiment, since the tooth 13 is a three-phase stator 10 for a rotating electrical machine (FIG. 4) in which 36 stator cores 11 are used and three coils 20 are incorporated in the core 11, A case where six first locking members 41 and six second locking members 42 are used is shown.

  As shown in FIG. 8, the six first locking members 41 are arranged around the first disk 43 at a predetermined angle obtained by dividing the entire circumference (360 °) by the number of the first locking members 41. In the form, it is attached radially every 60 °, and the six second locking members 42 are attached radially around the second disk 44 every 60 °. The first and second locking members 41 and 42 have the same structure, and the first and second locking members 41 and 42 are attached to the first and second disks 43 and 44, respectively, with mounting portions 41a and 42a. The hung portions 41b and 42b that are continuous with the mounting portions 41a and 42a and project outward from the outer circumferences of the first and second disks 43 and 44, and the projecting edges of the hung portions 41b and 42b away from each other. It has formed flanges 41c and 42c, and the respective hung portions 41b and 42b are formed so as to form a fan shape extending in the circumferential direction from the outer periphery of the first and second disks 43 and 44 to the outside. . Further, as shown in FIG. 7, the surfaces of the first and second locking members 41, 42 attached to the disks 43, 44 are flat, but the thicknesses of the hanging portions 41b, 42b are the attachment portions 41a, It is formed thick from 42a to the outside from the outer periphery of the disks 43 and 44. Thereby, the hanging surface on the opposite side of the mounting surface of the hanging portions 41b and 42b is formed to be inclined in a side view in FIG.

  The winding machine 30 includes a main body 30a in which a motor (not shown) is incorporated, and a rotating shaft 31 that is attached to the main body 30a so as to be tiltable and can be rotated by the motor. A first disc 43 and a second disc 44 around which the first and second locking members 41 and 42 are attached are attached to the rotary shaft 31, and the first and second locking members 41 and 42 are attached to the rotating shaft 31. They are attached with their surfaces coaxially centered with their faces facing each other and spaced apart by a predetermined distance. In this way, the first and second disks 43 and 44 are attached in parallel with each other with a predetermined gap therebetween, whereby a plurality of second locking members 42 are spaced with a predetermined gap between the first locking members 41. Make them face each other. Here, the predetermined interval between the first disk 43 and the second disk 44 is substantially equal to the length of the coil side portion 21a of the stator coil 20 to be obtained. It is ensured by interposing a spacer 30b between the disk 43 and the second disk 44. And since the surface where the 1st and 2nd latching members 41 and 42 were attached was turned outside mutually, the space | interval of the latching surface of the 1st latching member 41 and the latching surface of the 2nd latching member 42 is the same. It is attached so as to expand outward in the radial direction.

  Further, in this embodiment, the outer diameter of the second disk 44 is made larger than the outer diameter of the first disk 43, and the plurality of first locking members 41 arranged in an annular shape are arranged in an annular shape from the circle drawn. The circles drawn by the plurality of second locking members 42 are configured to be different. Although the first disk 43 and the second disk 44 are attached to the rotating shaft 31 of the winding machine 30, as shown in detail in FIG. The attached first or second locking member 42 is attached to the other second or first locking member 41 in a state moved in the circumferential direction by 30 °. As a result, the second locking member 42 is positioned in the gap between the first locking member 41 and the first locking member 41 adjacent to the first locking member 41, and the winding machine 30 rotates. The shaft 31 is configured to rotate together with the first and second disks 43 and 44 every 30 °. In addition, the code | symbol 43a is the binding member 43a attached to the 1st disk 43 in order to bind the edge part of the wire 17.

  As shown in FIG. 7, the winding machine 30 is provided with a nozzle shaft 32 protruding forward from the front surface on which the rotation shaft 31 is provided, and the wire rod 17 is inserted into the nozzle shaft 32. A tubular nozzle 33 whose tip can enter the gap between the first locking member 41 and the second locking member 42 is provided so as to be orthogonal to the nozzle shaft 32. In the rotary shaft 31, when the nozzle shaft 32 is raised and lowered, the end portion of the nozzle 33 that feeds the wire 17 passes through the vicinity of the outer periphery of the hooking portions 41b and 42b of the first and second locking members 41 and 42. Inclined and fixed to. In addition, the winding machine 30 is provided with a plurality of pulleys 35 and 36 for guiding the wire 17 supplied from a drum (not shown) around which the wire 17 is wound to the nozzle 33. One of them is provided on the nozzle shaft 32, and one of them is attached to the main body 30 a via a leaf spring 37 so as to be swingable. The leaf spring 37 is configured to absorb the slack of the wire rod 17 by its elasticity and give tension to the wire rod 17.

  The stator coil manufacturing method using this winding machine 30 is such that the nozzle shaft 32 is first protruded to cause the nozzle 33 to move between the first locking member 41 and the second locking member 42, as shown by the one-dot chain line in FIG. The wire rod 17 inserted through the nozzle 33 and inserted through the nozzle 33 is inserted between the first locking member 41 and the second locking member 42, and the end of the wire rod 17 is bound to the binding member 43a. Start from the state. Next, the winding machine 30 immerses the nozzle shaft 32 and passes the nozzle 33 through the gap between the first locking member 41 and the second locking member 42, and then the winding machine 30 moves the rotating shaft 31. The first and second disks 43 and 44 attached to the rotating shaft 31 are rotated together with the first and second locking members 41 and 42 in the circumferential direction by 30 °. Then, the nozzle 33 is opposed between the next first locking member 41 and the second locking member 42 adjacent to each other between the first locking member 41 and the second locking member 42 through which the nozzle 33 has passed first. Then, the winding machine 30 causes the nozzle shaft 32 to protrude and allows the nozzle 33 to pass through the gap between the next first locking member 41 and the second locking member 42. Then, the wire 17 inserted through the nozzle 33 is inserted between the next adjacent first locking member 41 and the second locking member 42 after being wound around the second locking member 42. And hung around the second locking member 42 to form a U-shape.

  Thereafter, the winding machine 30 rotates the rotary shaft 31 in the same direction again, and rotates both the first and second disks 43 and 44 together with the first and second locking members 41 and 42 in the circumferential direction by 30 °. Let Then, the nozzle 33 is inserted into a gap between the first locking member 41 and the second locking member 42 which are adjacent to each other between the first locking member 41 and the second locking member 42 through which the nozzle 33 has passed. The winding machine 30 again immerses the nozzle shaft 32 and passes the nozzle 33 through the gap. Then, the wire 17 inserted through the nozzle 33 is inserted between the next first locking member 41 and the second locking member 42 that are further adjacent after being wound around the first locking member 41, It hangs around the first locking member 41 and meanders to form an S shape.

  By repeating such an operation, the wire 17 can be meandered while being alternately wound around the first locking member 41 and the second locking member 42, and by continuing this operation, the wire 17 can be moved in the first and second locking members. A coil side portion 21a (FIG. 2) made of a straight wire 17 that circulates along the outer periphery of the two discs 43, 44 and spans between the first locking member 41 and the second locking member 42; Coil end portions 21b and 21c (FIG. 2) made up of the wire rod 17 along the circumferential direction by being wound around the first and second locking members 41 and 42 are alternately formed, and all the first and second locking members are formed. In a state where the wire 17 is wound around the wires 41 and 42 once, the wire 17 wraps around the outer circumference of the first and second disks 43 and 44 while meandering to form the unit wave coil 21.

  When the nozzle shaft 32 is projected and retracted, the end portion of the nozzle 33 that feeds the wire 17 passes through the vicinity of the outer periphery of the wrap portions 41b and 42b of the first and second locking members 41 and 42, so that unit wave winding has already been performed. When the above operation is repeated even after the coil 21 is formed, the wire rod 17 previously wound around the first locking member 41 and the second locking member 42 is radially outward as shown in FIGS. Next, a new wire 17 is wound around. That is, as shown in FIG. 9, when the nozzle shaft 32 is protruded and the rotary shaft 31 is rotated in the circumferential direction by 30 °, the wire 17 is first wound around the hook portion 41 b of the first locking member 41. It is wound around the wire 17 in a separated state. However, as shown in FIG. 10, when the nozzle shaft 32 is immersed and the rotary shaft 31 is rotated again by 30 °, the wire 17 is wound around the hooking portion 42b of the second locking member 42. The wire 17 hung on the hung portion 41b of the first locking member 41 is pulled in the circumferential direction, and moves toward the wire 17 that has been hung first as indicated by the broken line arrow in FIG. It will be adjacent to the wire from the outer peripheral side.

  In particular, in this embodiment, the hooking portions 41b, 42b of the first and second locking members 41, 42 are formed so as to form a fan shape that extends outward along the outer diameter of the disks 43, 44. And since the space | interval of the hanging surface of the 1st locking member 41 and the hanging surface of the 2nd locking member 42 was comprised so that it might expand toward a radial direction outer side, the 1st and 2nd locking member 41 is the same. When the wire rod 17 is hung around the hung portions 41b and 42b of the wire 42, the wire rod 17 is guided by the hung surfaces of the hung portions 41b and 42b which are fan-shaped and inclined, and the mounting portions 41a and 42a. Will move to the side. As a result, the wire 17 to be hung around the first locking member 41 and the second locking member 42 can be reliably adjacent to the previously hung wire 17 from the outside in the radial direction.

  Accordingly, the wire rod 17 that is alternately wound around the first locking member 41 and the second locking member 42 and circulates along the outer periphery of the first and second disks 43 and 44 by two or more laps. A new unit wave winding coil 21 adjacent to the unit wave winding coil 21 formed from the outer periphery side can be formed, and thereby a plurality of unit wave winding coils 21 are continuously formed in the radial direction. Can be obtained. Then, both the first and second locking members 41, 42 are hung so that the distance between the hooking surface of the first locking member 41 and the hooking surface of the second locking member 42 increases radially outward. Since the turning surface is inclined, it is adjacent to the outer peripheral side of the one unit wave winding coil 21 from the coil side portion 21a of one unit wave winding coil 21 that goes around the outer periphery of the first and second disks 43 and 44. And the coil side part 21a of the other unit wave winding coil 21 which makes a round can be lengthened.

  Further, the hooking portions 41b and 42b of the first and second locking members 41 and 42 form a fan shape that extends in the circumferential direction from the outer periphery of the first and second disks 43 and 44 to the outside. Since the coil end portions 21b and 21c (FIG. 2) made of wire rods hung around the hung portions 41b and 42b have different lengths at the hung positions, the outer side in the radial direction is longer. Become. For this reason, the coil end parts 21b and 21c of the other unit wave winding coil 21 adjacent to the outer peripheral side of the one unit wave winding coil 21 are made longer than the coil end parts 21b and 21c of the one unit wave winding coil 21. Can do.

  In this embodiment, the circle drawn by the plurality of second locking members 42 arranged in a ring is made different from the circle drawn by the plurality of first locking members 41 arranged in a ring. As shown, the circle C drawn by the coil end portion 21b at one end of the coil side portion 21a of the unit wave winding coil 21 is smaller than the circle D drawn by the coil end portion 21c at the other end portion of the coil side portion 21a. Or larger. Then, after the meandering wire 17 is circulated a predetermined number of times along the outer peripheries of the first and second disks 43, 44, the first and second disks 43, 44 shown in FIG. The stator coil 20 of the present invention is obtained by removing the first and second locking members 41 and 42 from the shaft 31.

  The stator coil 20 manufactured in this way is assembled to the stator core 11 using an inserter device 50 as shown in FIG. The inserter device 50 shown in the figure includes a rod-shaped blade 51 arranged along the inside of the tooth 13 (FIG. 3), a stripper 52 that moves inside the core 11, and a superposition of the blade 51 on the blade 51 from the outside. A receiving crown 53 for supporting the lower surface of the tooth 13 and a pressing ring 54 for pressing the annular portion 12 of the core 11 from above are provided. In addition, the inserter device 50 is provided with a plurality of pressing jaws 56 that allow the coil end portion 21 b protruding to the pressing ring 54 side to escape radially outward of the core 11.

  The stator coil 20 is mounted by positioning the large-diameter side coil end portion 21 c outside the receiving crown 53 and positioning the small-diameter side coil end portion 21 b inside the blade 51. Thereafter, the core 11 is supported by the receiving crown 53 and is pressed and fixed by the pressing ring 54. In this state, as shown in FIG. 6, the stripper 52 is inserted inside the core 11 and the coil end portion 21 b on the small diameter side located inside the blade 51 is pulled upward in the drawing. As a result, the coil side portion 21 a continuous with the coil end portion 21 b on the small diameter side is also lifted and raised while being pushed into the slot 14, and the coil end portion 21 b on the small diameter side reaches the upper side of the core 11. All the coil side portions 21a are accommodated in the slots 14. In this embodiment illustrating a three-phase rotating electrical machine, adjacent coil side portions 21 a are inserted into the slots 14 across the three teeth 13 as shown in FIG. 3.

  Here, in mounting the stator coil 20 to the inserter device 50, it is necessary to position one coil end portion 21c outside the receiving crown 53 and position the other coil end portion 21b inside the blade 51. However, in the stator coil 20 of the present invention, the unit wave winding coil 21 is placed along the conical surface with different circles drawn by the coil end portions 21b and 21c at the end of the coil side portion 21a. Can be. Further, in the state where the coil side 21a is accommodated in the slot 14, the coil side 21a along the conical surface rises and is parallel to each other. However, the plurality of coil sides 21a in the plane are changed to substantially right angles. Compared with the conventional product shown in FIG. For this reason, when the coil side 21a is erected, there is no damage caused by excessive contact of the stripper 52 or the like with the wire 17. Therefore, even if the wire rod 17 is a thick wire, the insulation coating of the wire rod 17 is not damaged, and insulation between the stator core 11 and the wire rod 17 or insulation between the wire rods 17 is ensured. The reliability can be remarkably enhanced by avoiding problems such as rust and rare.

  The coil end portions 21 b and 21 c protruding from the end surface in the axial direction of the core 11 are pushed outward in the radial direction of the core 11 by escape molding using the pressing jaw 56. Here, in this invention, since the other coil side part 21a adjacent to the outer peripheral side was made longer than the coil side part 21a of one unit wave winding coil 21, as shown in FIG. The coil end portions 21b and 21c projecting from the outer side of the core 11 are inclined with the projecting amounts decreasing from the outer diameter side to the inner diameter side. Then, the coil end portions 21b and 21c as a whole are closer to the outer diameter side of the stator core 20 from the beginning, and the coil end portions 21b and 21c existing inside the coil end portions 21b and 21c at the time of escape molding by the pressing jaw 56 are Since the coil end portions 21b and 21c on the outer diameter side enter the inner side of the core 11 side along the end surface of the core 11, the entire coil end portions 21b and 21c are relatively easily moved to the outer diameter side of the stator core 11. Can escape.

  In this embodiment exemplifying a three-phase rotating electric machine, as shown in FIG. 4, a coil of a coil that forms another phase is inserted in the slot 14 in which the coil side portion 21 a in the first coil 20 is not inserted. The side portion 21a is inserted, and thus the stator coils 20 for three phases are incorporated into the single stator core 11 to obtain the stator 10 of the rotating electrical machine. In this stator 10, as shown in FIG. 5, coil ends in the coil 20 of the other phase assembled thereafter in the space where the coil end portions 21 b and 21 c of the first coil 20 are pushed outward in the radial direction. The portions 21b and 21c can be routed and installed in the space, whereby the space factor of the coil end portions 21b and 21c in the space near the end surface of the core 11 can be increased. Then, the total length of the wire 17 for manufacturing the coil 20 is also reduced, the copper loss in the coil 20 is reduced, the efficiency of the rotating electrical machine using the coil 20 of the present invention is improved, and the outer shape of the rotating electrical machine is reduced in size. It is also possible to make it.

  In the above-described embodiment, the first and second locking members are arranged such that the distance between the hooking surface of the first locking member 41 and the hooking surface of the second locking member 42 increases radially outward. Although the hanging surfaces of both 41 and 42 are inclined, any one of the first and second locking members 41 and 42 may be inclined.

  In the above-described embodiment, the first and second disks 43 and 44 having different diameters are used, and the circles drawn by the coil end portions 21b and 21c at the end of the coil side portion 21a are made different so as to follow the conical surface. Although explained using the wave winding coil 21, if the insertion of the inserter device 50 is easy, the diameters of the first and second disks 43 and 44 are the same, and the coil end portion 21b at the end of the coil side portion 21a. , 21c may be the same, and the cylindrical unit wave winding coil 21 along the outer peripheral surface of the column may be obtained.

DESCRIPTION OF SYMBOLS 10 Stator for rotary electric machines 11 Stator core 14 Slot 17 Wire 20 Stator coil 21 Unit wave winding coil 21a Coil side part 21b, 21c Coil end part 41 1st locking member 42 2nd locking member C One edge part of a coil side part The circle drawn by the coil end in D The circle drawn by the coil end in the other end of the coil side

Claims (6)

The coil side portion (21a) inserted into the slot (14) of the stator core (11) and the coil end portions (21b, 21c) protruding from the axial end surface of the stator core (11) are arranged in the circumferential direction. A stator coil (20) in which a plurality of unit wave winding coils (21) that are alternately formed and make a round are continuously formed in the radial direction,
The coil side portion (21a) of another unit wave winding coil (21) adjacent to the outer peripheral side of the one unit wave winding coil (21) from the coil side portion (21a) of one unit wave winding coil (21) is rather long,
The diameter of the circle drawn by the coil end part (21b) at one end of the coil side part (21a) in the unit wave winding coil (21) and the coil end part at the other end of the coil side part (21a) ( The diameter of the circle drawn by 21c) is different from that of the coil side (21a) along the conical surface.
A stator coil characterized by that . A plurality of first locking members (41) are arranged annularly at a predetermined interval,
A plurality of second locking members (42) facing each other with a predetermined gap between the first locking members (41) are annularly arranged,
A plane including the plurality of first locking members (41) arranged in a ring and a plane including the plurality of second locking members (42) arranged in a ring are parallel to each other at a predetermined interval. And place
A wire rod (17) is alternately wound around the first locking member (41) and the second locking member (42) and circulated while meandering,
A coil side portion (21a) made of a wire (17) spanned between the first locking member (41) and the second locking member (42), and the first and second locking members (41). , 42) and a stator coil manufacturing method for obtaining a stator coil (20) in which coil end portions (21b, 21c) made of a wire rod (17) along the circumferential direction are alternately formed ,
A diameter of a circle drawn by the plurality of first locking members (41) arranged in a ring is different from a diameter of a circle drawn by the plurality of second locking members (42) arranged in a ring,
The diameter of the circle drawn by the coil end (21b) at one end of the coil side (21a) in the unit wave winding coil (21) and the coil end (21c) at the other end of the coil side (21a) ) In which the diameters of the circles drawn are made different so that the coil side (21a) runs along the conical surface . The first and second locking members (41, 42) are arranged such that the distance between the hooking surface of the first locking member (41) and the hooking surface of the second locking member (42) increases radially outward. ) Incline one or both of the hanging surfaces,
One unit wave coil (21) that makes a round of two or more turns of a meandering wire rod (17) that is alternately wound around the first locking member (41) and the second locking member (42) the coil side portions (21a) from a longer coil side portions of the other unit wave wound coil encircling adjacent to the outer circumferential side (21) and (21a) of said first unit wave wound coils (21) according to claim 2, wherein Manufacturing method of the stator coil.   A body (30a) with a built-in motor;
  A rotating shaft (31) rotatable by the motor;
  A retractable nozzle shaft (32) provided with a nozzle (33) for feeding out the wire (17);
  A first disc (43) and a second disc (44) attached in parallel to each other at a predetermined interval on the rotating shaft (31);
  A plurality of first locking members (41) and second locking members (42) arranged in a ring at predetermined intervals around each of the first disk (43) and the second disk (44); ,
  A hanging portion (41b, 42b) projecting outward from the outer periphery of the first and second disks (43, 44) formed on the first and second locking members (41, 42);
  The second locking members (42) are arranged to face each other at a position between the first locking members (41),
  The hanging portions (41b, 42b) are formed thick from the outer periphery of the first and second disks (43, 44) toward the outside,
  The tip of the nozzle (33) is provided perpendicular to the nozzle shaft (32) so that the tip of the nozzle (33) can enter the gap between the first locking member (41) and the second locking member (42).
The outer diameter of the first disk (43) is different from the outer diameter of the second disk (44),
  The rotating shaft (31) is inclined and fixed so that the end of the nozzle (33) passes through the vicinity of the outer periphery of the hanging portion (41b, 42b) when the nozzle shaft (32) is projected and retracted. Have
  A winding machine characterized by that.   The predetermined distance between the first disk (43) and the second disk (44) mounted in parallel is substantially equal to the length of the coil side (21a) of the stator coil (20). The winding machine according to claim 4. Comprises according to claim 1, wherein the stator coil (20) or claim 2 or 3 stator coil (20) obtained by the method described or stator coil produced by claim 4 or 5 winding machine according (20) Stator for rotating electrical machines.

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