JP6545358B2 - Insulator of stator and coil terminal wire introduction method - Google Patents

Description

  The present invention relates to an insulator of a stator and a method of introducing a coil end wire, and more particularly to a shape of an insulator in which coils are aligned and wound.

  The insulator is mounted on the teeth of the stator to electrically insulate the stator from the coils wound around the teeth of the stator. In the production process of the stator, the productivity of the stator can be improved by arranging the wire in alignment winding on the teeth on which the insulator is mounted to form a coil.

  FIG. 1 is a schematic view of a state in which an insulator of a stator according to a conventional example is mounted on teeth. As shown in FIG. 1, in the conventional example, a wire is wound along a wire guide groove 80 provided in the insulator 1 to form a coil. As described above, a method has been proposed in which the wire guide groove 80 is provided in the insulator to realize the alignment winding. Further, Patent Document 1 proposes a method of providing a protrusion for winding an introduction wire on an insulator.

JP, 2011-234516, A

  Generally, in the teeth, the cross section in the circumferential direction of the stator core is formed in a rectangular shape including the long side in the axial direction of the stator core and the short side in the circumferential direction of the stator core. Therefore, also in the coil wound around the teeth, the cross section in the circumferential direction of the stator core has a rectangular shape like the teeth.

  As in the conventional example shown in FIG. 1, in the insulator 1 provided with the wire guide groove 80, the winding direction of the coil and the winding start position depend on the position of the groove. Therefore, in order to wind a wire in a desired state, it is necessary to design an insulator according to each state. This can not avoid problems such as an increase in the number of parts, an increase in initial investment, and process complexity.

  When the insulator of Patent Document 1 is used, the lead wire of the wire is wound around the protrusion provided on the insulator, and when the first turn of the wire is started, the long side of the rectangular cross section of the teeth starts winding and Become. The wire moves from the first turn to the second turn on the short side, follows an oblique path, and the winding of the first layer ends. Since the subsequent second layer wire also follows an oblique path at the short side, the first layer and the second layer intersect at the short side. If the coil has a short side cross structure in which the short side crosses, when winding the wire by the winding machine, the flyer nozzle position is moved on the short side, and a sufficient movement distance for the cross is secured It can not be done and the load on the equipment will be large. In addition, high-speed winding also becomes difficult, and the workability is poor.

The insulator of the stator according to the present invention comprises a core back portion in contact with the inner peripheral surface of a cylindrical stator core, and a teeth portion which protrudes from the core back portion toward the center of the stator core and around which a wire is wound. The core back portion is connected to the teeth portion, and the axial direction of the stator core sandwiching the teeth portion from the pair of bases disposed in the axial direction of the stator core from the pair of bases. has a pair of projections formed to extend out in the axial direction of the stator core, and the protrusions at the connecting portion between the base portion, Ku fin portion is formed as a pair.

  According to the insulator of the stator according to the present invention, the neck portion is provided at the base of the protruding portion extending from both ends of the core back portion, and the wire can be wound around the neck portion to start the winding of the wire. Thereby, the variation in the winding start position of the wire is suppressed, and it is possible to obtain an insulator which does not require the design in consideration of the winding direction and the lead-in wire position.

It is the schematic of the state which mounted | wore the teeth with the insulator of the stator which concerns on a prior art example. It is the schematic which looked at the core back side of the insulator of the stator concerning this embodiment from the side. It is the top view which looked at the insulator of the stator concerning this embodiment from the stator upper part. It is a side view in the state where the insulator of the stator concerning this embodiment was equipped to a stator core. It is a perspective view which shows the state by which the coil was further wound by the insulator of the stator which concerns on this Embodiment. It is a top view which shows the state by which the coil was further wound by the insulator of the stator which concerns on this Embodiment. It is a top view which shows the state by which the coil was wound in multiple layers on the insulator of the stator which concerns on this Embodiment.

Embodiment.
The insulator of the stator according to the present embodiment is mounted on the teeth of the stator, and electrically insulates the stator from the coils wound around the teeth. The stator is constituted by a stator core comprising a cylindrical core back and a plurality of teeth radially extending from the inner circumferential surface of the core back, and a coil wound around the teeth through an insulator. .

<Configuration of Insulator 1>
FIG. 2 is a schematic view of the core back side of the insulator 1 of the stator according to the present embodiment as viewed from the side. FIG. 3 is a top view of the insulator 1 of the stator according to the present embodiment as viewed from the upper side of the stator. The insulator 1 is attached to each of the plurality of stator pieces, and the stator is configured by connecting the plurality of stator pieces as an annular divided laminated core. In FIG. 2, arrows indicating the upper and lower sides of the stator indicate axial directions of the stator core. Further, in FIG. 3, arrows indicating the core back side and the core inner side indicate the radial direction of the stator core.

  As shown in FIGS. 2 and 3, the insulator 1 has a thin-walled shape formed of an electrically insulating material such as a synthetic resin, and protrudes from the core back portion 2 and the core back portion 2 in top view And a tooth portion 5 to be provided. When the insulator 1 is viewed from the side, the core back portion 2 includes a substantially rectangular base 2 a and an opening 50 formed by the teeth 5, and the base 2 a includes a pair of protrusions 4 and a protrusion 4. The walls 6, 7 located on both sides are arranged.

  Teeth portion 5 projects from core back portion 2 in the central direction of the stator core, and is formed of flat portions 51a, 51b parallel to the circumferential direction of the stator core, and side portions 52a, 52a parallel to the axial direction of the stator core. The teeth portion 5 has a rectangular cross-sectional shape with the flat portions 51 a and 51 b as short sides and the side portions 52 a and 52 a as long sides, and the core back side is an opening 50. The openings 50 of the teeth 5 are formed in accordance with the cross-sectional shape of the teeth of the stator, the teeth are inserted into the openings 50 of the teeth 5, and the insulator 1 is mounted. The tip of the teeth portion 5 is a buttock portion 5a that spreads like a bowl.

  The protrusions 4 are connected to the base 2a at the upper and lower positions of the stator 5 sandwiching the teeth 5, and are formed in a pair so as to extend in the upper and lower directions of the stator, that is, in the axial direction of the stator core. The protrusion 4 is formed to have a width such that the circumferential width of the stator core matches the circumferential width of the teeth 5. The wall surface 4a of the projection 4 is positioned on the core back side equal to the radius of the wire by the radius of the wire than the base 2a, that is, on the outer circumferential side of the same dimension R by the radius of the wire than the inner peripheral surface of the core back portion 2. Is located in The projection 4 is provided with a neck portion 3 for winding the lead-in wire at both ends of the connection portion with the base portion 2a. The neck portion 3 has an arc shape that reduces the width of the protrusion 4, and the diameter of the arc is the same dimension D as the diameter of the wire. That is, the radius of curvature of the arc of the constriction portion 3 has the same dimension R as the radius of the wire.

  The walls 6 and 7 are disposed at positions sandwiching the protrusions 4 in the circumferential direction of the stator core, and, like the protrusions 4, are formed to extend from the base 2 a of the core back 2 to the upper and lower sides of the stator . The wall surfaces 6a and 7a of the wall portions 6 and 7 continuous with the inner peripheral surface of the base portion 2a are located on the inner peripheral side of the wall surface 4a of the protrusion 4 by the same dimension R as the wire radius. The walls 6 and 7 together with the collar 5a provided at the tip of the teeth 5 prevent the coil wound around the teeth 5 from expanding toward the core back side or the collar 5a.

  The groove 8 has one end on the base 2 a between the wall portions 6 and 7 on the upper side of the stator and the constriction 3 of the protrusion 4, and one end on the inner peripheral surface of the core back portion 2 in the direction of the stator lower side Extending, the other end reaches the base 2 a between the stator lower wall 6, 7 and the constriction 3. The groove portion 8 is continuous with the constriction portion 3 and extends in the axial direction of the stator core along the boundary between the inner peripheral surface of the core back portion 2 and the teeth portion 5 protruding from the inner peripheral surface of the core back portion 2. Two are formed. The groove 8 has a depth R equal to the radius of the wire and a width D equal to the diameter of the wire, and the winding start of the first turn after the lead-in wire is entangled in the neck portion 3 Define the route.

  FIG. 4 is a side view of a state in which the insulator 1 of the stator according to the present embodiment is attached to the stator core 9. As shown in FIG. 4, in the insulator 1, the inner peripheral surface of the stator core 9 is in contact with the surface on the core back side of the core back portion 2 of the insulator 1, and the teeth of the stator core 9 are accommodated in the teeth portion 5. It is attached. The teeth portion 5 is inserted into the opening 50 on the core back side of the core back portion 2. By mounting the insulator 1 to the stator core 9, the stator core 9 is electrically isolated from the coil wound around the stator core 9.

  In the above, although the insulator 1 is described in which the stator core 9 is inserted into and mounted on the teeth portion 5 of the insulator 1, the insulator 1 has, for example, an upper piece and a lower piece divided into two. It may be. In this case, the stator core 9 is inserted into the insulator 1 by fitting the upper piece and the lower piece with the stator core 9 interposed therebetween.

Method of winding coil to insulator 1
Subsequently, a winding method of winding a coil on the insulator 1 will be described.
FIG. 5 is a perspective view showing a state in which the coil 13 is wound around the insulator 1 of the stator according to the present embodiment. FIG. 5 exemplifies the case where the upper side of the stator is at the winding start position and the winding direction is counterclockwise. In the winding of the coil 13, first, the winding start position 11a and the winding direction of the wire are determined. The winding start position 11a of the wire on the upper side of the stator or the lower side of the stator is determined depending on which of the projections 4 on the upper side and the lower side of the stator the lead wire is drawn. The clockwise or counterclockwise winding direction is determined by which one of the left and right necks 3 of the protrusion 4 the lead wire is wound around. In the following description, the winding direction refers to the winding direction when the core back side is viewed from the center of the stator core.

  As shown in FIG. 5, the lead-in wire 10 of the wire passes through the back of the protrusion 4 and is entangled in one of the pair of constrictions 3 and the constriction 3 on the right side when viewed from the center of the stay core to the core back side. And a wire moves to the wall surface 4a side of the projection part 4, and starts the winding start 11 of 1st turn in the plane part 51a of a stator upper side first. Thereafter, the wire continues from the other narrow portion 3, that is, from the left narrow portion 3, and passes through a path along the groove 8 formed in the left side portion 52 a and passes through the flat portion 51 b on the lower side of the stator Reaches the side 52b of the Then, the wire aims at the winding start position 11a of the first turn in the right side portion 52b, that is, with the winding start position 11a of the first turn as a guide, a diagonal path from the core back side to the core inside The first turn winding ends at the winding end position 12a of the first turn. Subsequently, the wire moves from the winding end position 12a of the first turn to the flat portion 51a, and starts the winding of the second turn. The wire follows the path adjacent to the first turn along the wire at the first turn 11 at the beginning of the second turn 11, and the end 12 of the second turn is similar to the first turn at the side portion 52b. Follow the diagonal path. Then, the winding of the second turn is ended while shifting to the flat portion 51a, and the next turn is started. The third and subsequent turns are wound along the wire of the previous turn in the same manner as the first turn. As a result, the winding end 12 of the nth turn follows an oblique path from the core back side to the inner side of the core at the side surface 52b with the winding start 11 of the nth turn as a guide.

  FIG. 6 is a top view showing a state in which the coil 13 is wound around the insulator 1 of the stator according to the present embodiment. As shown in FIG. 6, the lead-in wire 10 is entangled in the neck portion 3 of the protrusion 4. For this reason, the winding start 11 of the first turn of the wire continuing from the lead-in wire 10 is located in the flat portion 51a formed by the short side of the rectangle forming the cross section of the tooth portion 5, and the path along the flat portion 51a. Follow In addition, the winding start 11 of the first turn of the wire is wound so as to follow the path along the groove 8 of the side surface 52a formed by the long side of the rectangle forming the cross section of the tooth 5 from the flat surface 51a. Be done. Therefore, the winding start 11 of the first turn of the wire is always located on the plane portion 51a formed by the short side, and along the groove portion 8 at the left side surface portion 52a formed by the long side. Become. The wire winding end 12 of the first turn follows an oblique path on the right side surface portion 52b formed by the long side, and shifts to the winding start 11 of the second turn wire on the long side. The above procedure is repeated, and when the wire reaches the collar 5a, the first winding of the coil 13 is finished.

  FIG. 7 is a top view showing a state in which the coil 13 is wound in a plurality of layers around the insulator 1 of the stator according to the present embodiment. As shown in FIG. 7, when the wire of the first layer reaches the ridge 5a, it is folded back and starts the winding start 11 of the first turn from the flat surface 51a on the ridge 5a side and is wound. Then, the winding end 12 follows an oblique path from the inside of the core toward the core back side in the side surface portion 52b, with the winding start 11 of the first turn as a guide, and intersects with the wire of the first layer. The coil 13 is formed by winding the wall portions 6, 7 and the ridge portion 5a sequentially as the winding start 11 of the first turn also in the layers of the third and subsequent layers. As described above, when the wire follows an oblique path in the side surface portion 52b, the wires forming the respective layers of the coil intersect at the side surface portion 52b, and the coil 13 having a long side cross structure is formed. Moreover, the wire after the second layer follows a path along wall surfaces 6a and 7a located on the core back side by the same dimension R as the wire radius than the wall surface 4a of the protrusion 4 in top view. For this reason, the coil 13 wound in a plurality of layers swells to the wall portions 6 and 7 side, and the contact between the coil 13 and the protrusion 4 is prevented. Moreover, the force of the direction of a core back side acts on the projection part 4 by the winding tension of the teeth part 5, and it can prevent also damaging.

  According to the insulator 1 of the stator according to the present embodiment described above, the core back portion 2 and the teeth portion 5 protruding from the inner peripheral surface of the core back portion 2 are provided, and at positions sandwiching the teeth portion 5 The projection 4 is formed to extend from the base 2 a of the core back portion 2. And a pair of constriction part 3 is provided in the base 2a which a projection part connects. When winding the coil 13 on the teeth portion 5, winding the wire in a desired direction is started by winding the wire on any of the neck portions 3. The variation in the winding start position 11 a of the wire can be suppressed, and the winding start 11 of the first turn can be positioned on the short side of the tooth portion 5. Also, the end of winding 12 of the nth turn starts winding of the start of winding 11 of the n + 1st turn with the winding start position 11a of the first turn as a guide, and the end of winding 12 of the wire for the nth turn is a side portion The diagonal path will be followed at 52b. Therefore, it is possible to set a long side cross in which the winding end 12 of the nth layer and the n + 1th layer intersect at the side surface portion 52b. Furthermore, regardless of the winding direction and lead-in wire position, the position after the second turn is determined using the winding start position 11a of the first turn as a guide, making it unnecessary to prepare an insulator for each winding direction and lead-in wire position It becomes.

  Moreover, according to the insulator 1 of the stator according to the present embodiment, since the constriction portion 3 is formed in an arc shape and the diameter of the arc shape is the same dimension D as the diameter of the wire, the wire is easily entangled.

  Further, according to insulator 1 of the stator according to the present embodiment, groove portion 8 which is continuous from narrow portion 3 and is parallel to the axial direction of stator core 9 is formed at the boundary between core back portion 2 and teeth portion 5. There is. Thereby, in the side surface portion 52a, the wire of the first turn follows the path along the axial direction by the groove portion 8, and the winding start 11 of the wire after the first turn continues along the path of the wire of the first turn. As a result, the alignment winding of the coil 13 is realized.

  Moreover, according to the insulator 1 of the stator according to the present embodiment, the groove 8 has a depth of the same size R as the radius of the wire and a width of the same size D as the diameter of the wire. Thus, the wire can be made to follow the path along the groove 8 at one long side, and the alignment winding of the coil 13 can be realized.

  Further, according to the insulator 1 of the stator according to the present embodiment, the protrusion 4 is formed on the outer circumferential side of the inner circumferential surface of the core back portion 2 by the same dimension R as the wire radius. Therefore, the wire of the second and subsequent layers of the coil 13 never comes in contact with the protrusion 4 of the insulator 1, and the protrusion 4 with a weak strength and the narrow portion provided on the protrusion 4 have tension of the wire when winding. Can be prevented from being destroyed.

  Further, according to insulator 1 of the stator according to the present embodiment, teeth portion 5 covers the teeth of stator core 9 made of a split laminated core, thereby providing insulation between stator core 9 and coil 13 wound around the teeth. You can keep it.

  Moreover, according to the insulator 1 of the stator according to the present embodiment, the wire wound around the teeth portion 5 is either clockwise or counterclockwise when looking at the core back portion 2 from the teeth portion 5 A wound coil 13 is formed. By selecting one of the pair of constricted portions formed in the base portion 2a of the core back portion 2, the winding direction of the wire may be wound either clockwise or counterclockwise. it can.

  Moreover, according to the insulator 1 of the stator which concerns on this Embodiment, the base 2a of the core back part 2 can be used as the winding start position of a wire. Since the protrusions 4 are formed on the base portions 2a of the core back portions 2 on the upper and lower sides of the stator core, it is possible to start winding the wire around the protrusions 4 regardless of which direction the lead-in wire 10 extends. it can.

  Moreover, according to the insulator 1 of the stator according to the present embodiment, the wire wound around the teeth 5 is adjacent to the side 52a in the long side direction of the rectangular cross section parallel to the axial direction of the core back 2 Cross the wire. For this reason, in the winding machine, the moving time of the fryer nozzle position can be lengthened, the load on the facility is reduced, and high-speed winding becomes easy.

  Moreover, according to the coil terminal wire introduction method according to the present embodiment, the end of the wire is wound around the constriction 3, and the first layer of wire is wound to follow the path along the groove, and the teeth 5 In the side portion 52a in the long side direction, transition from the winding end of the first layer to the winding start of the second layer is performed. As a result, in the winding machine, the moving distance of the fryer nozzle position is in the long side direction, and the time required for the movement is extended, so that the load on the facility is reduced and the high speed winding becomes easy.

  DESCRIPTION OF SYMBOLS 1 insulator, 2 core back part, 2a base, 3 necking part, 4 projection part, 4a wall surface, 5 teeth part, 5a ridge part, 6 wall part, 6a wall surface, 7 wall part, 7a wall surface, 8 groove part, 9 stator core, 10 introduction wire, 11 winding start, 11a 1st turn winding start position, 12 winding start, 13 coils, 50 openings, 51a, 51b flat parts, 52a, 52b side parts, 80 wire guide groove part.

Claims (12)

A core back portion in contact with the inner peripheral surface of the cylindrical stator core;
And a tooth portion that protrudes from the core back portion toward the center of the stator core and around which a wire is wound;
The core back portion is
A pair of bases connected to the teeth and arranged in the axial direction of the stator core;
And a pair of protrusions formed to extend in the axial direction of the stator core from the pair of base portions at axial positions of the stator core sandwiching the teeth portion,
The protrusion has
In the connection portion between the base portion, the stator Ku fin portion is formed as a pair insulator.   The neck portion has an arc shape
  The insulator of the stator according to claim 1. The stator insulator according to claim 2 , wherein a diameter of the constriction portion is equal to a diameter of the wire. At the boundary between the core back portion and the teeth portion,
The stator insulator according to any one of claims 1 to 3, wherein two grooves continuous from the pair of the narrow portions and along the boundary are formed in the axial direction of the stator core. The groove portion is
Having a depth the same dimension as the radius of the wire and a width the same dimension as the diameter of the wire,
The insulator of the stator according to claim 4 . The surface on the inner peripheral side of the core back portion of the protrusion is:
The same dimension as the radius of the wire from the inner circumferential surface of the core back portion is formed on the outer circumferential side,
The insulator of the stator according to any one of claims 1 to 5 . The teeth portion is
Covering teeth projecting in a central direction from the stator core,
The insulator of the stator according to any one of claims 1 to 6 . The stator core is a split laminated core,
The insulator of the stator according to any one of claims 1 to 7 . The wire wound around the teeth portion is
The stator insulator according to any one of claims 1 to 8 , wherein a coil wound in a clockwise or counterclockwise direction is formed by looking at the core back portion from the teeth portion. The teeth have a rectangular cross-sectional shape with short sides,
The insulator of the stator according to any one of claims 1 to 9 , wherein a plane formed by the short side is a winding start position of the wire. The teeth have a rectangular cross-sectional shape with long sides,
The stator insulator according to any one of claims 1 to 10 , wherein on the side surface formed by the long side, the winding end of the wire transitions to the winding start of a wire continuous to the wire. In the stator insulator according to any one of claims 1 to 11 ,
Winding the end of the wire to one of the pair of necks;
Allowing the wire to follow a path along a continuous groove from the other of the pair of constrictions, and winding the wire around the teeth;
Moving the winding end of the wire to the winding start of a wire continuous to the wire in a plane parallel to the axial direction of the stator core of the tooth portion.

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