JP2006157997A - Stator for dynamo-electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for dynamo-electric machine which can reduce dimensional change and besides can prevent the increase of iron loss. <P>SOLUTION: A plurality of through holes 9 are made at equal intervals in its circumferential direction in the vicinity of the periphery of core materials 2a, and these core materials 2a are stacked into a stator core 2, and then long through rods 10 in a C-shaped form in cross section are inserted into the above through holes 9. Since the through rods 10 are C-shaped in cross section, the outside diameter can be shrunk and also elastic resiliency can be obtained in the direction of its periphery at this time by so pressing the though rods 10 as to close them. The fellow core materials 2a of the stator core 2 are bound together by the elastic resiliency of these through rods 10 thereby temporarily fixing them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stator for a rotating electrical machine having a stator core formed by laminating a plurality of iron core materials.

Conventionally, as a stator of a general rotating electric machine, there is a configuration having a cylindrical stator iron core that is obtained by punching a thin electromagnetic steel sheet into an annular shape to obtain an iron core material and laminating them. Are known. Here, since such a stator core is configured by laminating a plurality of core materials as described above, the core materials are easily separated from each other. For this reason, it is necessary to temporarily fix the iron core materials (stator iron cores) until the coil is housed or wound around the stator iron core and fixed to the case. Therefore, conventionally, as shown in FIG. 10, the temporary fixing is performed, for example, by welding the outer periphery of the stator core 100 with a laser or the like in the stacking direction. Then, bolts 102 are inserted into the bolt holes 101 of the stator core 100 and tightened with nuts 103 to securely fix the stator core 100 and also to the case (not shown). ing.
Patent Document 1 also discloses a similar configuration in which an iron core material (electromagnetic steel plate) is welded using a laser (see particularly paragraph number “0021” and FIG. 1).
JP 08-149726 A

  However, the above configuration has the following problems. That is, if the stator core 100 is welded at the time of temporary fixing, the welded portion 104 is distorted due to the influence of heat at the time of welding, and a slight dimensional change occurs. There was a problem that iron loss increased.

  This invention is made | formed in view of the said situation, The objective is to provide the stator of the rotary electric machine which can reduce a dimensional change and can prevent the increase in a core loss.

In order to solve the above problems, the present invention provides a stator for a rotating electrical machine having a stator core formed by laminating a plurality of iron core materials.
A plurality of through holes are formed in the iron core material, and the iron core materials are stacked to obtain a stator core, and then a binding member is inserted into the through hole and the iron core materials are bound together by the elastic force of the binding member. The present invention is characterized in that (Invention of Claim 1).
According to this structure, even if it does not depend on welding, the iron core materials which comprise a stator iron core will be bound reliably by a binding member.

  As described above, according to the stator of the rotating electrical machine of the present invention, it is possible to reduce the dimensional change and prevent an increase in iron loss.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 illustrates a stator of a rotating electric machine according to the present embodiment, where (a) is a front view and (b) is a side view.

  As shown in FIG. 1, a stator 1 of a rotating electrical machine includes a coil 3 formed of, for example, enamel on an inner peripheral surface of a cylindrical stator core 2 formed by laminating iron core materials (electromagnetic steel plates) described later. It is configured by storing. At this time, both end portions of the coil 3 protrude from both end portions of the stator core 2 to be a coil end 4, and a power feeding end 5 (see FIG. 1B) is electrically connected to the coil end 4. ing.

  By the way, in the formation of the stator core 2, first, an iron core material 2a (see FIG. 1 (a) for the shape) formed by punching a thin electromagnetic steel sheet into a substantially annular shape is obtained. 2a is performed by laminating a plurality of sheets as shown in FIG. The iron core material 2a is formed with three ears 6 protruding at the outer periphery at intervals of 120 degrees. The ear 6 is provided with a bolt hole 6a (see FIG. 1B). A bolt 7 (see FIG. 1B) is inserted into the bolt hole 6a, and a nut 8 is screwed into the bolt 7.

  Further, in the vicinity of the outer periphery of the iron core material 2a, as shown in FIG. 1A, a plurality (eight locations in the present embodiment) of through-holes 9 are formed in the circumferential direction at equal intervals. A long through bar 10 having a “C” cross section corresponding to a binding member is inserted into the through hole 9 as shown in FIG. 3 (see FIG. 2). The penetrating rod 10 is made of stainless steel, for example, and has a “C” cross section. Therefore, if the penetrating rod 10 is pressed so as to be narrowed in the inner circumferential direction, the outer diameter thereof can be contracted. At the same time, an elastic repulsive force is obtained in the outer circumferential direction. The outer diameter of the penetrating rod 10 is slightly larger than the inner diameter of the through hole 8.

  Next, the process of forming the stator core 2 by laminating the iron core material 2a will be described. First, a plurality of core materials 2a punched in an annular shape are stacked to form a cylindrical shape. At this time, the bolt holes 7 and the through holes 9 are aligned in the axial direction. In this state, the through bar 10 is inserted into the through hole 9 aligned in the axial direction while applying a pressing force to the through bar 10 so as to squeeze in the inner circumferential direction. When the penetrating bar 10 is completely inserted into the through-hole 9, the penetrating bar 10 attempts to expand in the outer peripheral direction (so-called spring-like effect) by its own elastic repulsive force. The stator cores 2 are formed by binding, that is, temporarily fixing the core members 2a so as not to be separated from each other. Thereafter, the coil 3 is wound, and the bolt 7 is inserted into the bolt hole 6a, and the nut 8 is screwed into the bolt 7, so that the stator core 2 is securely fixed and fixed to a case (not shown). The child iron core 2 is fixed.

According to such a configuration, when the iron core materials 2a in the stator core 2 are temporarily fixed, the through rod 10 is inserted into the through hole 9 instead of welding, and the elastic repulsive force of the through rod 10 is obtained. A plurality of iron core members 2a are bound together. For this reason, the dimensional change and magnetic resistance (iron loss) of the iron core material 2a, and hence the stator iron core 2, can be significantly suppressed, and thereby the characteristics of the rotating electrical machine can be improved.
Further, since the through hole 9 is formed in the vicinity of the outer peripheral portion of the iron core material 2a, the outer peripheral surface of the rotor core 2 is flush, and the outer diameter of the rotor core 2 can be adjusted with high accuracy.
Note that the number of through-holes 9 is not limited to eight, but may be appropriately increased or decreased according to the size of the stator core and the intended use. Further, the through rod 10 may be configured not only to be inserted into all of the through holes 9 but also to be inserted intermittently.

Next, a second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the location similar to the said 1st Example, and the detailed description is abbreviate | omitted. FIG. 4 shows an enlarged view around the penetrating rod 10.
A plurality (eight places in this embodiment) of through holes 20 are formed at the outer peripheral end of the iron core material 2a. The through hole 20 is formed with an opening 21 desired outside the outer periphery, and the through bar 10 is inserted therein.
According to such a configuration, substantially the same effect as in the first embodiment can be obtained, and the through hole 20 is located on the outer peripheral portion of the iron core material 2a, so that the characteristics of the rotating electrical machine can be further improved. Can do. It should be noted that the number of through holes 20 and the number of through bars 10 can be appropriately changed.

Next, a third embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the location similar to the said 1st Example, and the detailed description is abbreviate | omitted. In FIG. 5, the illustration of the case is omitted.
As shown in FIG. 5, the penetrating rod 10 is inserted into the bolt hole 30 of the ear portion 6. A bolt (not shown) having an outer diameter along the inner diameter is inserted into the through-rod 10, and a nut (not shown) is screwed into the bolt. Although not shown, the through-rod 10 is not inserted into the through-hole 9 at this time.
Even with such a configuration, the same effect as in the first embodiment can be obtained.

  FIG. 6 shows a fourth embodiment of the present invention. The same parts as those in the first and third embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

In the fourth embodiment, the third embodiment is added to the first embodiment, and the bolt 31 and the nut 32 correspond to the bolt and nut of the third embodiment.
According to such a configuration, substantially the same effect as that of the first embodiment can be obtained, and the fixing condition at the time of temporary fixing can be further strengthened. The number of through-rods 10 is not limited to being inserted into all of the bolt holes 30, and the number thereof can be changed as appropriate.
In the first to fourth embodiments, the material of the penetrating rod 10 is stainless steel. However, the material is not limited to this, and the material is particularly limited if an appropriate elastic repulsive force can be obtained. It is not a thing.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the location similar to the said 1st Example, and the detailed description is abbreviate | omitted.
As shown in FIG. 7, the through hole 40 of the iron core material 2 a is configured by covering an outer peripheral surface (surface) of a long stainless steel mandrel 42 as shown in FIG. 8 with an adhesive resin 43. A penetrating bar 44 (corresponding to a binding member) 44 is inserted. The outer diameter of the through bar 44 is formed to be slightly larger than the inner diameter of the through hole 40 by covering the mandrel 42 with the adhesive resin 43. In the present embodiment, the through holes 40 are formed to have the same inner diameter.

  After the core material 2a is laminated and the through holes 40 are aligned in the axial direction, when the through rod 44 is inserted into the through holes 40 in a press-fit manner, the core materials 2a are bound together by the elastic repulsive force of the adhesive resin 43. Thus, the stator core 45 is obtained. Thereafter, a coil is wound, a heat treatment step (so-called varnish treatment step) is performed on the stator core 45, the resin 43 is melted, and the cores 2a of the stator core 45 are melted by the resin 43, And the iron core material 2a and the mandrel 42 are firmly and firmly fixed.

According to such a configuration, it is possible to obtain substantially the same effect as in the first embodiment, and it is possible to reduce the troublesomeness of using separate members such as bolts and nuts other than the through-rod 44.
In the present embodiment, the number of penetrating bars 44 is not particularly limited, and it goes without saying that the material of the mandrel 42 can be appropriately changed according to the strength and the like.

FIG. 9 shows a sixth embodiment of the present invention. The same reference numerals are given to the same portions as those in the first and fifth embodiments, and the detailed description thereof is omitted.
A through bar 44 is inserted into the bolt hole 41 of the ear 6. The relationship between the bolt hole 41 and the through rod 44 is the same as the relationship between the through hole 40 and the through rod 44 in the fifth embodiment.
In the fifth and sixth embodiments, the bolts and nuts as in the first to fourth embodiments can be omitted.
Here, although not shown in the figure, the configuration may be such that the mandrel 42 of the through-rod 44 is formed in a cylindrical shape, and a nut is screwed through the mandrel through a bolt.

The stator of the rotary electric machine of 1st Example in this invention is shown, (a) is a front view, (b) is a side view. Enlarged view around the penetrating bar Perspective view of through bar FIG. 2 equivalent view showing a second embodiment of the present invention FIG. 2 equivalent view showing a third embodiment of the present invention. FIG. 1 equivalent view showing a fourth embodiment of the present invention. FIG. 2 equivalent view showing a fifth embodiment of the present invention. 3 equivalent figure FIG. 2 equivalent view showing a sixth embodiment of the present invention FIG. 1B shows a conventional example, corresponding to FIG.

Explanation of symbols

  In the drawings, 1 is a stator of a rotating electric machine, 2 is a stator core, 2a is an iron core material, 6a is a bolt hole, 9 is a through hole, 10 is a through rod (binding member), 20 is a through hole, and 21 is an opening. , 30 are bolt holes, 40 is a through hole, 43 is an adhesive resin, 44 is a through bar (bundling member), and 45 is a stator core.

Claims (5)

In a stator of a rotating electric machine having a stator core formed by laminating a plurality of iron core materials,
A plurality of through holes are formed in the iron core material, and the iron core materials are stacked to obtain a stator core, and then a binding member is inserted into the through hole and the iron core materials are bound together by the elastic force of the binding member. A stator for a rotating electrical machine, characterized in that it is configured as follows.   The stator of a rotating electrical machine according to claim 1, wherein the through hole is formed so as to be located on an outer peripheral portion of the iron core material and to have an opening on the outer peripheral side. In a stator of a rotating electric machine having a stator core formed by laminating a plurality of iron core materials having bolt holes,
A stator for a rotating electrical machine, wherein a binding member is inserted into the bolt hole and the iron core members are bound by elastic force of the binding member. In a stator of a rotating electric machine having a stator core formed by laminating a plurality of iron core materials,
A plurality of through-holes are formed in the iron core material, and the iron core materials are stacked to obtain a stator core, and then a binding member whose surface is coated with an adhesive resin is inserted into the through-holes to insert the iron core materials together. A stator of a rotating electrical machine, wherein the iron core members are fixed together by binding them together and then heat-treating them to melt the resin. In a stator of a rotating electric machine having a stator core formed by laminating a plurality of iron core materials having bolt holes,
Inserting a binding member whose surface is coated with an adhesive resin into the bolt hole to bind the iron core materials together, and then heat-treating to melt the resin so as to fix the iron core materials to each other. A stator of a rotating electrical machine characterized by that.

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