JP2012228094A - Stator of rotary electric machine - Google Patents

Abstract

To provide a stator of a rotating electrical machine that can simplify the structure of a split iron core and improve yield and cost.
A split core 20 formed by laminating a plurality of core sheets, an insulator 30 covering each of the split cores 20 from the upper and lower surfaces, and a winding portion in which the split core 20 is wound via the insulator 30. A plurality of stator cores 10 composed of the above are fixed to each other at the insulator 30 portion to form an annular shape.
[Selection] Figure 1

Description

  The present invention relates to a stator for a rotating electrical machine in which a plurality of divided cores are assembled in an annular shape.

  A conventional stator has a configuration in which a plurality of split iron cores each having a back yoke portion connected in a ring shape and a teeth portion protruding from the back yoke portion are connected in a ring shape. As the fixing method, “the split iron core is formed with a first convex part on one of the left and right connecting surfaces of the back yoke part, and on the other side a first concave part into which the first convex part can be inserted from the stacking direction. A predetermined number of first core sheets are stacked to form a set, and the first yoke core plate can be inserted into one of the left and right connection surfaces of the back yoke portion into the first recess of the first core sheet from the stacking direction and the circumferential direction. 2nd convex part with which the 2nd recessed part in which both the 1st convex part and said 2nd convex part of said 1st iron core base plate can be inserted from a lamination direction and a circumferential direction on the other side is formed in 2 convex parts, respectively A predetermined number of plates are laminated to form one set, and a predetermined product of the second iron core plate The number of the sheets is set to be at least twice as large as the predetermined number of the first core sheets, and each set of the first core sheets and the second core sheets is alternately stacked in the stacking direction. There has been proposed a stator in which the stator is fitted with the first convex portion of the first core core plate and the first concave portion of the first core core plate in the adjacent split core. (For example, refer to Patent Document 1).

JP 2010-119163 A (page 4-5, FIG. 4)

  In the stator as described in Patent Document 1, the first iron core plate and the second iron core plate are formed by punching an electromagnetic steel plate into two types of shapes by pressing. For this reason, in forming the two types of core sheets, it is necessary to form four types of concavo-convex shapes of the first convex portion, the first concave portion, the second convex portion, and the second concave portion, and the yield during pressing is increased. It is a factor that decreases. Moreover, the press metal mold | die corresponding to each shape of two types of iron core base plates is needed, and has also become a factor of a cost increase.

  The present invention has been made to solve the above-described problems, and is a structure of a rotating electrical machine capable of simplifying the structure of a split iron core by connecting the insulators to each other, improving yield and reducing costs. The purpose is to obtain a stator.

  A stator of a rotating electrical machine according to the present invention includes a split iron core configured by stacking a plurality of core cores, an insulator that covers the split iron core from above and below, and a winding in which the split iron core is wound via the insulator. A plurality of stator cores composed of line portions are fixed to each other at an insulator portion and configured in an annular shape.

  Since the stator of the rotating electrical machine according to the present invention is configured by connecting the insulators to each other, the uneven portion of the core plate is eliminated, and the shape of the core plate can be simplified and unified. , Can increase the yield. In addition, it is not necessary to align the concave and convex portions of the iron core plate in the stacking direction, which leads to simplification of stacking when forming the split core, and the processing cost can be reduced.

It is a figure which shows the one part side surface of the stator of the rotary electric machine in Embodiment 1 of this invention. It is a top view of FIG. It is a perspective view which shows the structure of the division | segmentation iron core of FIG. It is a perspective view of the insulator of FIG. It is an expansion perspective view of the part enclosed with the dotted line of FIG. It is a schematic plan view which shows the state which looked at the assembly equipment from the top. It is AA sectional drawing of FIG. It is a figure which shows the structural example 1 of the fixing structure of the insulator in Embodiment 2 of this invention. It is a figure which shows the structural example 2 of the fixing structure of the insulator in Embodiment 2 of this invention. It is a figure which shows the structural example 1 of the fixing structure of the insulator in Embodiment 3 of this invention. It is a figure which shows the structural example 2 of the fixing structure of the insulator in Embodiment 3 of this invention. It is a figure which shows the structural example 3 of the fixing structure of the insulator in Embodiment 3 of this invention. It is a figure which shows the one part side surface of the stator of the rotary electric machine in Embodiment 4 of this invention. It is the figure which looked at the insulator of FIG. 13 from the arrow A direction.

Embodiment 1 FIG.
1 is a view showing a part of a side surface of a stator of a rotating electrical machine according to Embodiment 1 of the present invention. FIG. 2 is a plan view of FIG. In addition, in the following drawings including FIG. 1 and FIG. 2, the relationship between the sizes of the constituent members may be different from the actual one.

  The stator is formed by annularly connecting a plurality of stator cores 10. FIG. 1 and FIG. 2 show a part of an annularly configured stator. Although the entire configuration of the rotating electrical machine is not illustrated, the rotating electrical machine is configured by press-fitting and fixing the stator into the housing of the rotating electrical machine by shrink fitting.

  The stator core 10 is wound in a concentrated winding manner on a split core 20, an insulator (insulating member) 30 that covers the split core 20 from above and below, and a tooth portion 22 (described later) of the split core 20 via the insulator 30 ( And a winding part (not shown) to which a not shown is provided. This embodiment is characterized in that, when the plurality of stator cores 10 are connected in a ring shape, the insulators 30 and not the split iron cores 20 are connected and fixed together. Details of this fixing structure will be described later.

FIG. 3 is a perspective view showing a configuration of the split iron core of FIG.
The split iron core 20 is formed by stacking iron core plates, and a back yoke portion 21 corresponding to a substantially T-shaped head portion and a teeth portion corresponding to a substantially T-shaped body portion and protruding from the back yoke portion 21. 22. Further, a notch 23 having a predetermined shape is formed on the outer peripheral portion of the back yoke portion 21.

FIG. 4 is a perspective view of the insulator of FIG. FIG. 5 is an enlarged perspective view of a portion surrounded by a dotted line in FIG. 1, in which (a) shows a state before fixing, and (b) shows a state after fixing.
The insulator 30 is formed so as to extend from a fitting portion 31 fitted to the tooth portion 22 and an end surface on the yoke portion side of the fitting portion 31 so as to cover a part of the upper surface or the lower surface of the back yoke portion 21 in the circumferential direction. The outer wall portion 32 and the inner wall portion 33 are formed and resin-molded.

  The insulator 30 is further formed with a fixing portion 34 and a fixed portion 35 that are used for fixing to the other adjacent insulators 30. Hereinafter, the fixing structure by the fixing part 34 and the fixed part 35 will be described in detail.

  A fixing portion 34 is formed on one side surface of the outer wall portion 32 of the insulator 30, and a fixed portion 35 fixed to the fixing portion 34 of the adjacent insulator 30 is formed on the other side surface of the outer wall portion 32. In a state where the plurality of insulators 30 are arranged in an annular shape, the fixing portion 34 of one insulator 30 adjacent to each other and the fixed portion 35 of the other insulator 30 are formed to face each other.

  The fixing portion 34 has a cylindrical protrusion 34a protruding toward the other insulator 30 to be fixed, and the fixed portion 35 is a cylindrical recess into which the protrusion 34a of the insulator 30 is inserted. 35a. The protrusion 34a is formed with a sufficient length in the circumferential direction so as to reach the recess 35a when the stator cores 10 are adjacent to each other. Further, the recess 35a is formed in a tapered shape in which the opening area is reduced toward the bottom surface and finally reduced to an area smaller than the tip end area of the protrusion 34a. 4 and 5, the protrusion 34 a has a cylindrical shape, but may have another shape such as a triangular prism or a quadrangular prism. In that case, the recess 35a is formed in a tapered shape that has an opening shape that is formed in a triangle or a quadrangle in accordance with the outer shape of the protrusion 34a, and reduces toward the bottom surface of the recess 35a to an area smaller than the tip end area of the protrusion 34a. do it.

Next, assembly of the stator will be described.
FIG. 6 is a schematic plan view showing the assembly facility as viewed from above. In FIG. 6, the stator core 10 is hatched. FIG. 7 is a cross-sectional view taken along the line AA in FIG.
First, a plurality (9 in this case) of stator cores 10 are set in the work fixing unit 103 of the assembly facility 100. That is, as shown in FIG. 7, each stator core 10 is set on the fixing base 115 of the work fixing unit 103. The stator core 10 is placed on the bottom retainer 111.

  Each stator core 10 is held on the inner peripheral surface side by the workpiece inner periphery holding 104 and on the outer peripheral surface side by the workpiece outer periphery holding 105. When each stator core 10 is set, one end of the notch 23 of each divided core 20 is gripped by the fixed chuck claw 106, and then the movable chuck claw 107 is moved to grip the other end. In this way, each stator core 10 is annularly arranged on the work fixing unit 103. Next, the handle 110 attached to the workpiece fixing unit 103 is moved. As the handle 110 moves, the cam groove ring 102 rotates along the cam groove ring holding 114 fixed to the base 101, and the cam 108 and the workpiece fixing unit 103 move in the center direction following the cam groove 109.

  The fixing base 115 and the bottom surface presser 111 are fixed to the slide base 112. The base 101 is provided with a slide guide 113 for moving the slide base 112 in the center direction. When the handle 110 is moved, the cam 108 and the workpiece fixing unit 103 move in the center direction, that is, the slide base 112 slides along the slide guide 113.

  If it does so, each stator core 10 will move to the center direction of a circle | round | yen, and the protrusion part 34a of the insulator 30 will be inserted in the recessed part 35a of the insulator 30 which adjoins. Since the area of the bottom surface of the recess 35a is smaller than the tip area of the protrusion 34a, the protrusion 34a is press-fitted into the recess 35a, causing plastic deformation in the recess 35a, resulting in a tight fit. Thereby, the insulators 30 adjacent to each other are fixed, and the stator core 10 can be fixed in an annular shape as a whole.

  As described above, according to the first embodiment, the stator cores 10 adjacent to each other can be fixed by the insulator 30, so that the uneven portion conventionally provided in the core core plate constituting the split core is not necessary, It becomes possible to simplify and unify the shape of the core plate. Therefore, the yield can be increased. In addition, it is not necessary to align the concave and convex portions of the iron core plate in the stacking direction, which leads to simplification of stacking when forming the split core, and the processing cost can be reduced. Further, since the insulator 30 is resin-molded and only one kind of structure is sufficient, the cost can be reduced also from this aspect.

  Also, the assembly equipment has been described above. However, since it can be easily fixed by a human hand, a special assembly equipment is not necessarily required, and the cost can be reduced and the production space can be saved. .

Embodiment 2. FIG.
The second embodiment shows another example of a fixing structure provided in the insulator 30. In the first embodiment, the stator core 10 has a fixing structure in which the stator core 10 is moved in the circumferential direction and press-fitted. However, in the second embodiment, the stator core 10 is arranged in the stacking direction (the iron cores constituting the split iron core 20). A fixing structure of a type in which it is moved in the direction of stacking the plates and press-fitted will be described. Hereinafter, configuration examples of two patterns will be described in order. In the second embodiment, the fixing structure provided in the insulator 30 is different from the first embodiment, and the rest is the same as the first embodiment.

(Configuration example 1)
8A and 8B are diagrams showing a configuration example 1 of the insulator fixing structure according to Embodiment 2 of the present invention, in which FIG. 8A shows a state before fixing, and FIG. 8B shows a state after fixing.
The fixing portion 34 of the fixing structure in FIG. 8 has a quadrangular columnar protrusion 34b protruding toward the other adjacent insulator 30 side, and the fixed portion 35 is substantially the same as the outer shape of the tip portion of the protrusion 34b. It has an inner shape, and has a notch 35b into which the tip end portion of the protrusion 34b is press-fitted from the stacking direction. The notch 35b is formed in a taper shape whose opening area is reduced as it goes in the press-fitting direction, and the opening area is reduced to an area smaller than the area of the tip portion of the protrusion 34b press-fitted into the notch 35b. Is formed. By pressing the protrusion 34b into the notch 35b in the stacking direction, the tip of the protrusion 34b undergoes plastic deformation in the notch 35b, and the insulators 30 are fixed. With the fixing structure of the insulator 30, the stator cores 10 can be fixed.

(Configuration example 2)
9A and 9B are diagrams showing a configuration example 2 of the insulator fixing structure according to Embodiment 2 of the present invention, in which FIG. 9A shows a state before fixing, and FIG. 9B shows a state after fixing.
The fixing portion 34 of the fixing structure in FIG. 9 has a protruding portion 34c that protrudes toward the adjacent insulator 30 and extends in the stacking direction from the tip thereof, and the fixed portion 35 is the outer shape of the tip portion of the protruding portion 34c. The tip part of the projection part 34c has the recessed part 35c press-fitted from the lamination direction. In this example, the tip portion of the protrusion 34c is formed in a columnar shape, and the inner shape of the recess 35c is also formed in a columnar shape. The recess 35c is formed in a tapered shape whose opening area is reduced to an area smaller than the tip area of the protrusion 34c toward the bottom surface. By pressing the protrusion 34c into the recess 35c in the stacking direction, the tip of the protrusion 34c undergoes plastic deformation in the recess 35c, and the insulators 30 are fixed. With the fixing structure of the insulator 30, the stator cores 10 can be fixed. In FIG. 9, the tip of the protrusion 34 c is cylindrical, but may be other shapes such as a triangular prism or a quadrangular prism. In that case, the concave portion 35c is formed in a tapered shape in which the opening shape is formed in a triangle or a quadrangle in accordance with the outer shape of the protruding portion 34c, and is reduced toward the bottom surface of the concave portion 35a to an area smaller than the tip end area of the protruding portion 34c. do it.

  According to the second embodiment described above, the same operational effects as those of the first embodiment can be obtained.

Embodiment 3 FIG.
The third embodiment shows another example of a fixing structure provided in the insulator 30. Although three configuration examples are shown below, each configuration example is a type in which the fixing portion 34 has a pair of locking projections, and the pair of locking projections are press-fitted into the fixed portion 35 in the circumferential direction. Are common. Hereinafter, each configuration example will be described in order. In the third embodiment, the fixing structure provided in the insulator 30 is different from the first embodiment, and other than that is the same as the first embodiment.

(Configuration example 1)
10A and 10B are diagrams showing a configuration example 1 of an insulator fixing structure according to Embodiment 3 of the present invention, in which FIG. 10A shows a state before fixing, and FIG. 10B shows a state after fixing.
The fixing portion 34 of the fixing structure in FIG. 10 has a pair of locking protrusions 34d protruding toward the adjacent insulator 30 side, and locking claws protruding outward at the respective tips of the pair of locking protrusions 34d. 36d is formed. The fixed portion 35 has a through hole 35d that penetrates in the circumferential direction. The pair of locking projections 37d can bend in a direction facing each other (here, in particular, a direction approaching each other), and the pair of locking projections 37d are inserted in the through hole 35d in the circumferential direction using the bending, The insulators 30 are fixed together by locking the locking claws 36d around the distal end side in the insertion direction of the through hole 35d by the restoring force of the pair of locking protrusions 37d.

(Configuration example 2)
FIGS. 11A and 11B are diagrams showing a configuration example 2 of the insulator fixing structure according to Embodiment 3 of the present invention. FIG. 11A shows a state before fixing, and FIG. 11B shows a state after fixing.
The fixing portion 34 of the fixing structure in FIG. 11 has a pair of locking projections 34e protruding toward the adjacent insulator 30 side, and locking claws protruding inward at the respective tips of the pair of locking projections 34e. 36e is formed. Moreover, the to-be-fixed part 35 has a pair of latching groove 35e which latches the latching claw 36e of a pair of latching protrusion 34e. The pair of locking grooves 35e are provided at both ends in the radial direction of the fixed portion 35 so as to penetrate in the circumferential direction. In addition, the pair of locking projections 34e can bend in a direction facing each other (in particular, a direction away from each other in this case), and the pair of locking projections 34e is surrounded by the pair of locking grooves 35e by using the bending. The insulators 30 are fixed to each other by engaging the locking claws 36e around the distal ends in the insertion direction of the pair of locking grooves 35e by the restoring force of the pair of locking protrusions 34e.

(Configuration example 3)
12A and 12B are diagrams showing a configuration example 3 of the fixing structure of the insulator 30 according to the third embodiment of the present invention, in which FIG. 12A shows a state before fixing and FIG. 12B shows a state after fixing.
The fixing portion 34 of the fixing structure in FIG. 12 has a pair of locking protrusions 34f that protrude in the adjacent insulator 30 side and are opposed to each other in the radial direction, and each tip of the pair of locking protrusions 34f faces inward. A protruding latching claw 36f is formed. Further, the fixed portion 35 has a pair of locking projections 35f that protrude to the adjacent insulator 30 side and oppose each other in the stacking direction, and each tip of the pair of locking projections 35f protrudes inward. A pawl 37e is formed. The pair of locking projections 34f can bend in a direction facing each other (here, in particular, a direction away from each other), and the pair of locking projections 35f are also in a direction facing each other (here, in particular, a direction away from each other). The pair of locking projections 34f of the fixing portion 34 can be bent in a direction away from each other and moved relatively to the fixed portion 35 side, and the pair of locking claws 36f of the fixing portion 34 are moved by the restoring force. The insulators 30 are fixed to each other by being locked by the pair of locking claws 37 f of the fixed portion 35.

  According to the third embodiment described above, the same operational effects as those of the first embodiment can be obtained.

  In the first to third embodiments described above, the structure that is fixed by the fixing portion 34 and the fixed portion 35 provided in the insulator 30 has been described, but the contact portion between the fixing portion 34 and the fixed portion 35 is further subjected to ultrasonic welding or You may make it weld using methods, such as heat welding. In this case, the fixing strength can be increased.

Embodiment 4 FIG.
In the first to third embodiments, the structure in which the insulators 30 are fixed to each other by the fixing portion 34 and the fixed portion 35 provided in the insulator 30 has been described. However, in the fourth embodiment, the fixing portion 34 and the fixed portion 35 are fixed. In addition, a plurality of stator cores 10 fixed in a ring shape are bundled together using a binding band.

FIG. 13 is a diagram showing a part of a side surface of the stator of the rotating electrical machine according to the fourth embodiment of the present invention. FIG. 14 is a view of the insulator of FIG. 13 as viewed from the direction of arrow A. Although FIG. 13 shows an example in which the fixing structure of the first embodiment shown in FIG. 1 is applied as the fixing structure, the fixing structures of the second and third embodiments may be applied.
A groove 40 for attaching a binding band is formed on the outer periphery of the outer wall portion 32 of each insulator 30 so as to extend in the circumferential direction as a whole in a state where the plurality of stator cores 10 are fixed in an annular shape. The entire stator core is bound by winding and attaching the binding band 50 to the groove 40. The width of the grooves 40 in the stacking direction is formed to be substantially the same as the width of the binding band 50 so that no deviation occurs in the stacking direction in the binding state.

  As described above, according to the fourth embodiment, the same effects as those of the first to third embodiments can be obtained, and the whole stator is bound using the binding band, so that the overall fixing strength is increased. be able to. Alternatively, the contact portion between the fixed portion 34 and the fixed portion 35 may be welded by ultrasonic welding, heat welding, or the like, and further bound using the binding band 50.

  10 stator cores, 20 split cores, 21 back yoke parts, 22 teeth parts, 23 notches, 30 insulators, 31 fitting parts, 32 outer wall parts, 33 inner wall parts, 34 fixing parts, 34a projecting parts, 34b projecting parts, 34c protrusion, 34d locking protrusion, 34e locking protrusion, 34f locking protrusion, 35 fixed part, 35a recess, 35b notch, 35c recess, 35d through hole, 35e locking groove, 35f locking protrusion, 36d Stopper, 36e Locking claw, 36f Locking claw, 37d Locking protrusion, 37e Locking claw, 37f Locking claw, 40 grooves, 50 Cable ties, 100 Assembly equipment, 101 Base, 102 Cam groove ring, 103 Workpiece fixing Unit, 104 Workpiece inner circumference holding, 105 Workpiece outer circumference holding, 106 Fixed side chuck claw, 107 Rear movable side chuck claw, 1 8 cams, 109 cam groove 110 a handle, 111 bottom presser, 112 slide base, 113 slide guide, 114 cam groove ring holding, 115 fixed base.

Claims (10)

  A plurality of fixed cores composed of a split core formed by stacking a plurality of core sheets, an insulator covering each of the split cores from above and below, and a winding portion in which the split core is wound via the insulator. A stator of a rotating electrical machine, wherein a child core is annularly fixed to each other at the insulator portion.   The insulator has a fixing portion and a fixed portion for fixing to an adjacent insulator, and is configured to be fixed in the circumferential direction or the stacking direction of the divided cores by the fixing portion and the fixed portion. The stator of the rotating electrical machine according to claim 1, wherein the stator is a rotating electrical machine. The fixing portion of the insulator has a protruding portion that protrudes toward the fixed portion of an adjacent insulator,
The fixed portion of the insulator has a recess or a hole into which the protrusion is press-fitted in the circumferential direction, and the recess or the hole is smaller in area than the tip end area of the protrusion as it goes in the press-fitting direction. It is formed in a tapered shape that reduces the opening area,
The press-fit of the protrusions into the recesses or the holes in the circumferential direction causes plastic deformation of the tips of the protrusions in the recesses or the holes, and the insulators are fixed by an interference fit. Item 3. A rotating electric machine stator according to Item 2. The fixing portion of the insulator has a protruding portion that protrudes toward the fixed portion of an adjacent insulator,
The fixed portion of the insulator has a notch in which a tip portion of the projection is press-fitted in the stacking direction of the split cores, and the notch is press-fitted into the notch as it goes in the press-fitting direction. Formed in a tapered shape in which the opening area is reduced to an area smaller than the area of the tip portion of the protrusion,
The tip of the projection is pressed into the notch in the stacking direction, so that the tip of the projection is plastically deformed in the notch, and the insulators are fixed by an interference fit. The stator of the rotary electric machine according to claim 2. The fixing portion of the insulator has a protruding portion that protrudes toward an adjacent insulator and extends in the stacking direction from the tip thereof.
The fixed portion of the insulator has a recess in which the tip of the projection is press-fitted in the stacking direction of the divided cores, and the recess has an area that is smaller than the tip area of the projection as it goes in the press-fitting direction. It is formed in a tapered shape that reduces the opening area to
The fixing of the rotating electrical machine according to claim 2, wherein the protrusion is press-fitted into the recess to cause a plastic deformation of the tip of the protrusion in the recess, and the insulators are fixed by a tight fit. Child. The fixing portion of the insulator has a pair of locking projections that protrude to the adjacent insulator side and have locking claws protruding outward at the tip.
The fixed portion of the insulator has a through-hole penetrating in the circumferential direction,
The pair of locking protrusions can bend in directions opposite to each other, and the pair of locking protrusions are inserted into the through holes in the circumferential direction using the bending, and the locking claws are inserted into the through holes. The stator of a rotating electrical machine according to claim 2, wherein the insulators are fixed by being locked around the front end side in the direction. The fixing portion of the insulator has a pair of locking protrusions that protrude to the adjacent insulator side and have locking claws that protrude inward at the tip.
The fixed portion of the insulator has a pair of locking grooves for locking the locking claws of the pair of locking protrusions, and the pair of locking grooves are at both ends in the radial direction of the fixed portion. Are provided to penetrate in the circumferential direction,
The insulators are fixed by inserting the pair of locking protrusions into the pair of locking grooves in the circumferential direction and locking the locking claws around the distal end side in the insertion direction of the pair of locking grooves. The stator for a rotating electric machine according to claim 2. The fixing portion of the insulator has a first pair of locking projections protruding in the adjacent insulator side, having a first locking claw protruding inward at the tip, and facing in the radial direction,
The to-be-fixed portion of the insulator has a second pair of locking projections protruding in the adjacent insulator side, having a second locking claw protruding inward at the tip, and facing in the stacking direction. ,
Insulator by moving the first pair of locking projections in the circumferential direction toward the second pair of locking projections and locking the first locking claws to the second locking claws The stator for a rotating electric machine according to claim 2, wherein the stators are fixed to each other.   The stator of the rotating electrical machine according to any one of claims 1 to 8, wherein a contact portion between the fixed portion and the fixed portion is welded.   A groove for attaching a binding band that extends in the circumferential direction as a whole in a state where the plurality of stator cores are fixed in an annular shape is formed on the outer periphery of each insulator, and the groove includes a groove for attaching the binding band. The stator of a rotating electrical machine according to any one of claims 1 to 9, wherein the plurality of stator cores are bound by winding and attaching a binding band having substantially the same width as the width. .

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