JP2016032331A - Stator of dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate bonding of laminated core plates.SOLUTION: A core plate 31-1 having a surface 11a (burr 72) directing one side of the stator axial direction and a back 11b (burr 71) directing the other side of the stator axial direction, and a core plate 31-2 having a surface 11a (burr 72) directing the other side of the stator axial direction and a back 11b( burr 71) directing one side of the stator axial direction are laminated alternately in the stator axial direction. Between the core plates 31-1, 31-2 where the burrs 71 face each other at the inner periphery, varnish can be impregnated easily from a gap 81 at the outer periphery, and between the core plates 31-1, 31-2 where the burrs 72 face each other at the outer periphery, varnish can be impregnated easily from a gap 82 at the inner periphery.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a stator for a rotating electrical machine including a stator core in which a plurality of core plates in which rotor accommodating holes are formed are laminated in the axial direction.

  In the stator of Patent Document 1 below, a plurality of core plates are stacked to form a stator core, and the stacked core plates are bonded to each other with a thread-like thermoplastic resin.

JP 2009-177895 A JP 2011-182552 A JP 2014-96429 A

  In Patent Document 1, when the laminated core plates are bonded to each other, there is a material cost for the thread-like thermoplastic resin and a processing cost for arranging the thread-like thermoplastic resin between the core plates. This will increase the cost.

  It is an object of the present invention to easily bond laminated core plates.

  The stator of the rotating electrical machine according to the present invention employs the following means in order to achieve the above-described object.

  A stator of a rotating electrical machine according to the present invention is a stator of a rotating electrical machine including a stator core in which a plurality of core plates in which rotor accommodating holes are formed are stacked in the axial direction. When punched with a movable mold, the rotor housing hole is formed by punching an electromagnetic steel sheet with a movable mold from the one plate surface side, and in the stator core, the one plate surface A core plate facing toward one side in the axial direction and a core plate whose one plate surface faces toward the other side in the axial direction are alternately stacked in the axial direction, and an adhesive material is filled between the stacked core plates. Is the gist.

  ADVANTAGE OF THE INVENTION According to this invention, the filling of the adhesive material between the laminated | stacked core plates can be performed easily, and adhesion | attachment of core plates can be performed easily.

It is a figure which shows schematic structure seen from the axial direction of the stator which concerns on embodiment of this invention. It is a figure equivalent to the AA cross section of FIG. It is a figure which shows the structural example of a core plate. It is a figure explaining an example of the punching which forms a rotor accommodation hole and a slot part. It is a figure which shows the structural example of the electromagnetic steel plate after the punching process of FIG. It is a figure explaining an example of the punching process which forms a core plate. It is a figure which shows the structural example of the core plate after the punching process of FIG. It is a figure which shows the structural example at the time of laminating | stacking so that the surface may face one side of a stator axial direction, and a back surface may face the other side of a stator axial direction about all the core plates.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  1-3 is a figure which shows schematic structure of the stator of the rotary electric machine which concerns on embodiment of this invention. 1 shows a configuration example viewed from the axial direction of the stator, FIG. 2 shows a diagram corresponding to the AA cross section of FIG. 1, and FIG. 3 shows a configuration example of the core plate 31. The stator includes a stator core 21 having a rotor housing hole 20 formed in the center portion along the stator axial direction, and a coil 22 wound around the stator core 21. The stator core 21 includes an annular stator yoke 23 that extends along the circumferential direction of the stator, and a plurality of stator teeth 24 that protrude from the stator yoke 23 inward in the stator radial direction (not shown). The plurality of stator teeth 24 are arranged at regular intervals (equal intervals) in the stator circumferential direction. Status lots 25 are formed between stator teeth 24 adjacent in the stator circumferential direction, and a plurality of status lots 25 are arranged at regular intervals (equal intervals) in the stator circumferential direction. Each stator tooth 24 and each status lot 25 extend along the stator axial direction. The coil 22 is wound around each stator tooth 24 through a status lot 25. The rotor (not shown) is disposed on the inner peripheral side of the stator and is accommodated in the rotor accommodation hole 20.

  The stator core 21 is configured by laminating a plurality of core plates 31 having a rotor accommodation hole 30 formed in the center in the stator axial direction. As shown in FIG. 3, each of the plurality of core plates 31 has the same shape, and an annular yoke portion 33 that extends along the circumferential direction of the stator, and a plurality of core plates 31 that protrude inward in the stator radial direction from the yoke portion 33. Teeth portion 34. The plurality of teeth portions 34 are arranged at regular intervals (equal intervals) in the circumferential direction of the stator. Slot portions 35 are formed between teeth portions 34 adjacent in the stator circumferential direction, and a plurality of slot portions 35 are arranged at regular intervals (equal intervals) in the stator circumferential direction. A stator yoke 23 is formed by stacking a plurality of yoke portions 33 of the core plate 31 in the stator axial direction, and a stator tooth 24 is formed by stacking a plurality of teeth portions 34 of the core plate 31 in the stator axial direction. Then, the rotor accommodating hole 20 of the stator core 21 is formed by the rotor accommodating hole 30 of each core plate 31, and the status lot 25 is formed by the slot portion 35 of each core plate 31. In the following description, when it is necessary to distinguish between the plurality of core plates 31, the following description will be made using reference numerals 31-1 and 31-2.

  Next, a method for manufacturing the core plate 31 will be described. The core plate 31 is manufactured by punching the electromagnetic steel plate 41.

  In the step of forming the rotor housing hole 30 and the slot portion 35 of the core plate 31, as shown in FIG. 4, a punch (movable type) 51 is made to face the surface (one plate surface) 11a of the electromagnetic steel plate 41, and the electromagnetic The back surface (the other plate surface) 11 b of the steel plate 41 is supported by a die (fixed mold) 52. And the rotor accommodation hole 30 and the slot part 35 are formed by punching out the electromagnetic steel plate 41 with the punch 51 from the surface 11a side. After the electromagnetic steel plate 41 is punched by the punch 51, burrs 71 are generated by shearing on the inner peripheral portion of the steel plate portion supported by the die 52 (the edges of the rotor housing hole 30 and the slot portion 35). As shown in FIG. 5, the burr 71 is formed to protrude toward the back surface 11 b side of the electromagnetic steel plate 41.

  In the step of forming the core plate 31, as shown in FIG. 6, the punch 61 is opposed to the front surface 11 a of the electromagnetic steel plate 41, and the back surface 11 b of the electromagnetic steel plate 41 is supported by the die 62. And the electromagnetic steel plate 41 is punched with the punch 61 from the surface 11a side. The core plate 31 is formed by the steel plate portion punched by the punch 61. A burr 72 due to shearing is generated on the outer peripheral portion of the core plate 31 (the steel plate portion punched by the punch 61). As shown in FIG. 7, the burr 72 is formed to protrude toward the surface 11 a side of the core plate 31.

  The core plate 31 is manufactured by punching the electromagnetic steel sheet 41 described above. In that case, it is possible to perform the punching process with the punch 51 after the punching process with the punch 51 first, or the punching process with the punch 51 after performing the punching process with the punch 61 first. It is also possible. After punching, a burr 71 is generated on the back surface 11b side in the inner peripheral portion of the core plate 31 (the edge of the rotor accommodation hole 30 and the slot portion 35), and a burr 72 is the surface in the outer peripheral portion of the core plate 31. It occurs on the 11a side. However, in FIGS. 2, 5, and 7, the burrs 71 and 72 are shown larger than the actual size for convenience of explanation.

  After the core plate 31 is manufactured, the stator core 21 is configured by stacking a plurality of core plates 31 in the stator axial direction without removing the burrs 71 and 72. In this case, as shown in FIG. 2, the surface 11a (burr 72) faces the one side in the stator axial direction, and the back surface 11b (burr 71) faces the other side in the stator axial direction, and the surface 11a ( The core plates 31-2 with the burrs 72) facing the other side in the stator axial direction and the back surfaces 11b (burrs 71) facing the one side in the stator axial direction are alternately stacked in the stator axial direction. In FIG. 2, for convenience of explanation, four core plates 31-1, 31-2 are illustrated, but the number of core plates 31-1, 31-2 that are alternately stacked can be arbitrarily set. . The laminated core plates 31-1 and 3-2 are filled with an adhesive material such as a resin (for example, varnish), so that the laminated core plates 31-1 and 31-2 are bonded to each other.

  As shown in FIG. 8, when all the core plates 31 are stacked such that the front surface 11a (burr 72) faces one side in the stator axial direction and the back surface 11b (burr 71) faces the other side in the stator axial direction, Between the core plates 31 adjacent in the axial direction, burrs 71 exist on the inner peripheral portion and burrs 72 exist on the outer peripheral portion. In that case, impregnation of the varnish between the core plates 31 is hindered by the burrs 71 and 72, and the adhesiveness between the core plates 31 tends to be lowered.

  On the other hand, according to the present embodiment, between the core plates 31-1 and 31-2 adjacent in the stator axial direction, the burrs 71 face each other at the inner peripheral portion, or the burrs 72 face each other at the outer peripheral portion. To do. As shown in FIG. 2, between the core plates 31-1 and 31-2 where the burrs 71 face each other at the inner peripheral portion, no burrs exist on the outer peripheral portion, and a gap 81 is formed. Varnish can be easily impregnated between the plates 31-1 and 31-2. On the other hand, between the core plates 31-1 and 31-2 where the burrs 72 face each other at the outer peripheral portion, there is no burr in the inner peripheral portion, and a gap 82 is formed. , 31-2 can be easily impregnated with varnish. Therefore, the adhesiveness of the varnish between the core plates 31-1 and 31-2 can be easily improved. Further, the dimensional accuracy of the stator core 21 can be improved and the vibration and noise of the stator can be reduced, and the reliability of the rotating electrical machine can be improved. At that time, the varnish is impregnated between the core plates 31-1 and 31-2 simply by alternately stacking the core plates 31-1 and 31-2 on which the burrs 71 and 72 are formed by punching. The gaps 81 and 82 can be formed. Therefore, a special material cost and a processing cost for bonding the core plates 31-1 and 31-2 to each other are unnecessary, and the cost of the stator is not increased.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course.

  11a Front surface, 11b Back surface, 20, 30 Rotor receiving hole, 21 Stator core, 22 Coil, 23 Stator yoke, 24 Stator teeth, 25 Status lot, 31 (31-1, 31-2) Core plate, 33 Yoke part, 34 teeth Part, 35 slot part, 41 magnetic steel sheet, 51, 61 punch, 52, 62 die, 71, 72 burr, 81, 82 gap.

Claims (1)

A stator of a rotating electrical machine comprising a stator core in which a plurality of core plates in which rotor accommodating holes are formed are laminated in the axial direction,
The core plate is formed by the punched steel plate portion when the electromagnetic steel plate is punched with a movable mold from one plate surface side,
The rotor housing hole is formed by punching out a magnetic steel sheet with a movable mold from the one plate surface side,
In the stator core, the core plate whose one plate surface is directed to one side in the axial direction and the core plate whose one plate surface is directed to the other side in the axial direction are alternately stacked in the axial direction, and between the stacked core plates A stator of a rotating electrical machine, which is filled with an adhesive material.

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