JP4181910B2 - Axial type rotating electrical machine and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an axial type rotating electrical machine having a stator core formed by winding a steel plate and having a plurality of teeth portions formed on one surface, and a method for manufacturing the same.
[0002]
[Prior art]
Generally, a stator and a rotor are coaxially arranged inside an axial type rotating electrical machine. The stator includes a stator core and a case that accommodates the stator core, and the stator core includes a plurality of tooth portions formed on one surface of a laminate in which a strip-shaped steel plate is wound, and each of the tooth portions includes Is wound with a winding (see, for example, Patent Documents 1 and 2).
[0003]
To manufacture this stator, first, a part of a strip-shaped steel plate is punched at a predetermined pitch using a punching device (see, for example, Patent Documents 3 to 5). Next, the punched steel plate is fed from the punching device to a cylindrical core by a feeding device such as a roller, and the steel plate is wound on the circumferential surface of the core. Thereby, the stator core which is the laminated body of the said steel plate is formed on the said circumferential surface of the said core. In this case, slot portions are respectively formed at a plurality of locations where the steel plate is punched, and teeth portions are formed between the respective slot portions. Further, a part of the steel plate that is out of the punching range of the punching device is formed as a yoke portion that supports the teeth portions.
[0004]
Next, winding is performed around each of the tooth portions. In addition, when winding with one conducting wire with respect to several teeth part, this winding is given so that the slack of the said conducting wire, etc. may not generate | occur | produce between the said teeth parts.
[0005]
Next, the stator core is accommodated in a case, thereby forming a stator. In order to accommodate the stator core in the case, there are a method of fixing the stator core in the case by adhesion or resin molding, and a method of fitting and fixing the stator core shown in Patent Document 1 in the case. In the method of fitting the stator core into the case, the lower portion of the stator core is placed in the recess of the base of the case, and then a plurality of teeth and windings provided on the upper portion of the stator core are connected to the frame plate. The base plate, the frame plate, and the top plate are finally fastened by fastening members of bolts and nuts.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-191603 (page 2-4, FIGS. 1 and 2)
[Patent Document 2]
Japanese Patent Laid-Open No. 10-309049 (second page, FIG. 4, FIG. 5)
[Patent Document 3]
Japanese Patent Laid-Open No. 55-94562 (page 1-2, FIG. 1)
[Patent Document 4]
JP-A-55-114168 (page 1-2, FIGS. 1 and 2)
[Patent Document 5]
JP 56-49653 A (page 1-2, FIG. 1, FIG. 5, FIG. 7)
[0007]
[Problems to be solved by the invention]
However, in the method of fixing the stator core in the case by bonding, it is difficult to ensure the fixing strength between the stator core and the case. Moreover, since it takes a long time for the adhesive to dry after the adhesive is applied to the adhesive surface between the stator core and the case, there is a risk that the working efficiency related to the manufacture of the stator may be reduced.
[0008]
On the other hand, in the method of fixing the stator core in the case by resin molding, it is easy to secure the fixing strength between the stator core and the case, but it takes a long time for the resin material used for the resin molding to harden. Therefore, even in this method, there is a risk that the working efficiency related to the manufacture of the stator may be reduced.
[0009]
Further, in the method of fixing the stator core by fitting it in the case, at least the base, the frame plate, the top plate, and the fastening member are required for fixing the stator core, so that the number of parts constituting the stator increases. The manufacturing cost of the stator may increase.
[0010]
The present invention has been made in consideration of such problems, and is required when the stator core is accommodated in a case by providing a plurality of holes through which fastening means such as bolts are inserted in the stator core. It is an object of the present invention to provide an axial type rotating electrical machine and a method for manufacturing the same that can achieve a reduction in the number of parts, an improvement in work efficiency related to the manufacture of the stator, and a reduction in the manufacturing cost of the stator.
[0011]
[Means for Solving the Problems]
An axial type rotating electrical machine according to the present invention is an axial type rotating electrical machine having a stator core formed by winding a steel plate and having a plurality of teeth portions formed on one surface. The stator core is formed from an inner peripheral surface of the stator core. A plurality of protrusions formed by bending a part of the steel sheet toward the center or from the outer peripheral surface of the stator core toward the outside, and the protrusion includes a part of the steel sheet. It is characterized in that a hole is formed by bending.
[0012]
In this case, when the stator core is accommodated in the case by bending a part of the steel plate constituting the stator core to form the protrusion and the hole, the hole of the stator core and the hole provided in the case are formed. For example, the stator core can be accommodated in the case simply by inserting a bolt and tightening the bolt with a nut. Thereby, it becomes possible to reduce the number of parts required when accommodating a stator core in a case. Further, since the stator core can be accommodated in the case simply by tightening the bolts and nuts, the assembly work of the axial type rotating electrical machine is simplified, and the work efficiency of the assembly work is improved. Therefore, it is possible to reduce the manufacturing cost in the axial type rotating electric machine.
[0013]
The method for manufacturing an axial type rotating electrical machine according to the present invention includes a step of fixing a steel plate to a steel plate fixing portion provided on an outer periphery of a winding portion provided with a plurality of recesses, and rotating the winding portion. A part of the steel sheet by pressing the pressing member against a part of the steel sheet covering the plurality of recesses by the step of winding the steel sheet around the winding part and the rotation of the winding part. Bending along the surface of each of the recesses to form a plurality of protrusions on the steel plate, winding the steel plate along the outer periphery of the winding portion, and not bending the plurality of protrusions And forming a stator core by forming holes between the steel plates.
[0014]
According to the method for manufacturing an axial type rotating electrical machine described above, a hole formed by a part of the steel plate constituting the stator core and a hole provided in the case for housing the stator core are inserted with a bolt, and the bolt is inserted into the nut. The stator core can be accommodated in the case simply by tightening with the above. Thereby, it becomes possible to reduce the number of parts required when accommodating a stator core in a case. Further, since the stator core can be accommodated in the case simply by tightening the bolts and nuts, the assembly work of the axial type rotating electrical machine is simplified and the work efficiency of the assembly work is improved. Therefore, it is possible to reduce the manufacturing cost in the axial type rotating electric machine.
[0015]
Moreover, in the manufacturing method of the axial type rotating electrical machine described above, in the step of forming the protrusion, the pushing member and a part of the steel plate are contacted in accordance with an increase in the number of windings of the steel plate in the winding portion. Reduce the area. That is, when forming the protruding portion, the tip end portion of the pushing member that presses a part of the steel sheet is made smaller as the number of windings of the steel sheet increases. Thereby, when bending a steel plate to the center of a winding part by a pushing member and a recessed part, the curved part of the said steel plate can be formed in a defined shape, and the hole of a stator core can be formed accurately.
[0016]
Moreover, the manufacturing method of the axial type rotating electrical machine according to the present invention includes a step of fixing a steel plate to a steel plate fixing portion provided on an outer periphery of the winding portion, and the winding portion by rotating the winding portion. A step of winding the steel plate and stopping the rotation of the winding portion, and then, along the outer peripheral surface of the wound steel plate, a plurality of pin members at a predetermined interval with respect to the winding portion. The step of placing, the step of rotating the winding unit to start winding the steel plate along the outer peripheral surface of the steel plate of the winding unit, and the rotation of the winding unit cover the pin member Bending a part of the steel sheet along the surface of each pin member by pressing a pressing member against a part of the steel sheet to form a plurality of protrusions on the steel sheet; A step of fixing an end of the steel sheet wound by the number of windings, and the plurality of pins Pull the timber from the projecting portion, it is characterized by a step of forming the stator core by forming a hole between the steel sheets not bend the said protrusion.
[0017]
In this case, the protruding portion is formed by bending the steel plate to the outside of the winding portion by the pin member and the pressing member. As a result, a hole is formed between the unbent steel plate and the protrusion. Therefore, the stator core can be accommodated in the case only by inserting a bolt through the hole of the stator core and the hole provided in the case for accommodating the stator core and tightening the bolt with a nut. Thereby, it becomes possible to reduce the number of parts required when accommodating a stator core in a case. Further, since the stator core can be accommodated in the case simply by tightening the bolts and nuts, the assembly work of the axial type rotating electrical machine is simplified and the work efficiency of the assembly work is improved. Therefore, it is possible to reduce the manufacturing cost in the axial type rotating electric machine.
[0018]
In the manufacturing method of the axial type rotating electrical machine described above, in the step of forming the protruding portion, the contact area between the pressing member and a part of the steel plate is increased according to an increase in the number of windings of the steel plate in the winding portion. increase. That is, when forming the protruding portion, the tip end portion of the pressing member that presses a part of the steel plate is enlarged according to the increase in the number of windings of the steel plate. Thereby, when bending a steel plate with a pressing member and a pin member, the curved part of the said steel plate can be formed in a defined shape, and the hole of a stator core can be formed accurately.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS An axial type rotating electrical machine and a method for manufacturing the same according to the present invention will be described in detail below with reference to the accompanying drawings by giving preferred embodiments.
[0020]
As shown in FIG. 1, an axial type rotating electrical machine 10 (hereinafter referred to as a rotating electrical machine 10) according to the present embodiment includes a stator 12 and a rotor 16 disposed coaxially with the stator 12 via a gap 14. Have
[0021]
The stator 12 has a stator core 18. As shown in FIGS. 2 and 3, the stator core 18 is a substantially annular laminated body in which a steel plate 22 made of, for example, a silicon steel plate is wound, and a plurality of teeth are disposed on the laminated body. The portions 24 are formed to be separated from each other by slot portions 26 having a predetermined interval. In this case, the plurality of teeth portions 24 are formed so that the width of the teeth portions 24 is narrowed from the outer peripheral surface of the stator core 18 to the inner peripheral surface thereof, and are set to the same height. On the other hand, the lower portion of the stator core 18 functions as a yoke portion 28 that supports each tooth portion 24.
[0022]
On the inner peripheral surface of the stator core 18, a plurality of protrusions 30 protruding from the yoke portion 28 toward the center of the stator core 18 are provided at equal intervals. The protrusion 30 is formed by bending a part of the steel plate 22 wound a plurality of times toward the center of the stator core 18. In this way, by bending a part of the steel plate 22, a hole 32 is formed between the curved and protruding steel plate 22 and the non-curved steel plate 22 in the protrusion 30. As can be seen from FIG. 3, the stator core 18 is formed with four protrusions 30 spaced by 90 °, and the protrusions 30 are respectively formed with holes 32.
[0023]
Then, as shown in FIG. 2, the stator core 18 can be housed and fixed in a case (not shown) as will be described later by inserting a bolt 52 into the hole 32 and tightening the bolt 52 with a nut (not shown). .
[0024]
As shown in FIGS. 1 and 2, the side surface of each tooth portion 24 of the stator core 18 is surrounded by a bobbin 34 made of an electric insulator, and the side surface of each bobbin 34 is wound with a conductive wire wound a predetermined number of times. A line 36 is arranged. In this case, the conducting wire may be wound around one tooth portion 24 to form one winding 36, or may be wound around each of the plurality of tooth portions 24 to form a plurality of windings 36. It may be formed.
[0025]
In the stator 12 shown in FIG. 2, one end of six conductors is electrically connected to the three primary terminals 38 and the three secondary terminals 40, respectively. Each of the teeth 24 is wound around each of the teeth portions 24 to form a winding 36. The other ends of the three conducting wires respectively connected to the three primary terminals 38 are electrically connected via a metal plate 42. On the other hand, the other ends of the three conducting wires different from the conducting wires are electrically connected to the three secondary terminals 40 via metal plates different from the metal plate 42, respectively. As shown in FIG. 1, the stator core 18, the bobbin 34 and the winding 36 are surrounded by resins 44 and 46.
[0026]
The rotor 16 is disposed so as to cover the upper surface of the stator 12 via the gap 14. The rotor 16 is provided with a substantially annular magnet 48 facing the upper surface of the stator core 18. In the rotating electrical machine 10 configured as described above, when a current is passed through the winding 36, the rotor 16 supports the axis line connecting the center of the stator 12 and the center of the rotor 16 by a rotating magnetic field generated from the stator core 18. Rotating as will be easily understood.
[0027]
In the rotating electrical machine 10 according to the present embodiment, the stator core 18 is accommodated in the case by inserting the bolt 52 through the hole 32 of the stator core 18 and the hole of the case (not shown) and tightening the bolt 52 with a nut. Therefore, the number of parts required when the stator core 18 is accommodated in the case can be reduced. Thus, the stator core 18 can be accommodated in the case by simply tightening the bolt 52 and the nut. Therefore, the assembly work of the rotating electrical machine 10 is simplified, and the work efficiency of the assembly work is improved. Therefore, it is possible to reduce the manufacturing cost of the rotating electrical machine 10.
[0028]
Next, a method for manufacturing the rotating electrical machine 10 according to the present embodiment will be described below with reference to FIGS.
[0029]
Stator core 18 of rotating electrical machine 10 according to the present embodiment is manufactured by stator core manufacturing apparatus 60 shown in FIG. The stator core manufacturing apparatus 60 includes a drum 62 in which a steel plate 22 that is a raw material of the stator core 18 (see FIG. 3) is wound around a shaft portion 74, a plurality of rollers 64 that draws and conveys the steel plate 22 from the drum 62, A tension roller 66 for applying tension to the transported steel plate 22, a steel plate punching means 68 for punching a part of the transported steel plate 22 into a predetermined shape, and the tension of the steel plate 22 that has passed through the steel plate punching means 68 are maintained. Guide roller 70 to be wound, and winding means 72 to which the conveyed steel plate 22 is wound.
[0030]
The steel plate punching means 68 includes an upper punch 76 and a lower die 78. When the upper punch 76 is lowered with respect to the steel plate 22 passing through the steel plate punching means 68, a part of the steel plate 22 is punched into a predetermined shape. It is.
[0031]
The winding means 72 has a substantially cylindrical winding member 80 and a pushing member 82. The winding member 80 includes a substantially cylindrical winding portion 84, a substantially cylindrical steel plate adjustment portion 86 provided to protrude from the lower portion of the outer peripheral surface of the winding portion 84 to the outside of the winding portion 84, and a winding A shaft portion 88 connected to the portion 84 and the steel plate adjustment portion 86. The winding portion 84, the steel plate adjusting portion 86, and the shaft portion 88 are connected to each other coaxially.
[0032]
A plurality of concave portions 90 are provided on the outer peripheral surface of the winding portion 84 toward the center of the winding portion 84 at predetermined intervals. Furthermore, a slit-shaped steel plate fixing portion 92 having a width that is approximately the thickness of the steel plate 22 is provided on the outer peripheral surface of the winding portion 84 toward the center of the winding portion 84. Accordingly, when the shaft portion 88 is rotated in a state where the end portion 94 of the steel plate 22 is fixed by the steel plate fixing portion 92, the steel plate 22 is wound on the outer peripheral surface of the winding portion 84 along the surface of the steel plate adjustment portion 86. Turned.
[0033]
On the other hand, the pushing member 82 is made of, for example, a punch, and the shape thereof is formed substantially the same as the shape of the concave portion 90, and is configured to advance and retract toward the center of the winding portion 84. Thereby, when the concave portion 90 moves to a position facing the pressing member 82 by the rotation of the winding portion 84, a part of the steel plate 22 on the concave portion 90 is moved when the pressing member 82 is moved toward the concave portion 90. Is pressed by the pressing member 82 and is curved toward the center of the winding portion 84 along the shape of the recess 90.
[0034]
Next, a specific manufacturing process of the stator core 18 of the rotating electrical machine 10 according to the present embodiment will be described with reference to FIGS.
[0035]
First, as shown in FIG. 5, the steel plate 22 a having a predetermined width is pulled out from the drum 62 (see FIG. 4), and the end of the steel plate 22 a is fixed to the steel plate fixing portion 92.
[0036]
Next, the entire winding member 80 is rotated by rotating the shaft portion 88. Thereby, winding by the winding member 80 with respect to the steel plate 22a is started. At that time, if the steel plate 22a is wound around the winding portion 84 while the side surface of the steel plate 22a is in contact with the surface of the steel plate adjustment portion 86, the steel plate 22a is positioned and wound.
[0037]
Next, as shown in FIG. 6, in a state where a part of the steel plate 22a and the recess 90 face each other, the pushing member 82 disposed above the winding member 80 is lowered toward the recess 90, and the steel plate 22a A part is pressed by the pushing member 82. Thereby, as shown in FIG. 7, the said part of steel plate 22a is curvedly formed toward the center (shaft part 88) of the winding part 84 in the recessed part 90 (henceforth a 1st curved part). .
[0038]
Next, the winding member 80 is rotated by 90 ° as shown in FIG. 8 while maintaining the pressed state of the steel plate 22a against the first curved portion. At this time, the concave portion 90 (hereinafter referred to as the first concave portion 90) and the pushing member 82 (hereinafter referred to as the first pushing member 82) also rotate 90 ° together with the first curved portion.
[0039]
In this case, the end portion of the steel plate 22a is fixed to the steel plate fixing portion 92, and the first curved portion is also fixed to the winding member 80 by the first pushing member 82. Therefore, the winding member 80 is rotated. Accordingly, the steel plate 22 wound around the drum 62 (see FIG. 4) can be easily conveyed to the winding means 72.
[0040]
When a portion of the steel plate 22a and a recess 90 different from the first recess 90 (hereinafter referred to as the second recess 90) are opposed to the position where the first curved portion is formed, the first A pressing member 82 (hereinafter referred to as a second pressing member 82) different from the pressing member 82 is lowered toward the second recess 90. Accordingly, a part of the steel plate 22a is curved toward the center of the winding portion 84 (hereinafter referred to as a second curved portion).
[0041]
Next, the winding member 80 is rotated by 90 ° as shown in FIG. 9 while maintaining the pressed state of the second pushing member 82 against the second curved portion of the steel plate 22a. Accordingly, the second curved portion, the second pushing member 82, and the second recessed portion 90 are rotated by 90 °, and the first curved portion, the first pushing member 82, and the first recessed portion 90 are rotated. Rotate 90 ° further. That is, the first curved portion, the first pushing member 82, and the first concave portion 90 are rotated by 180 ° from the position where the first curved portion is formed, that is, the lower portion of the winding member 80. Move to.
[0042]
At this time, at a position where the first and second curved portions are formed, a concave portion 90 (hereinafter referred to as a third concave portion 90) different from the first and second concave portions 90 and a part of the steel plate 22a Are facing each other. In this state, a pushing member 82 (hereinafter referred to as a third pushing member 82) different from the first and second pushing members 82 is lowered toward the third recess 90. Accordingly, a part of the steel plate 22a is curved toward the center of the winding portion 84 (hereinafter referred to as a third curved portion).
[0043]
In that case, the 1st pushing member 82 arrange | positioned under the winding part 84 is spaced apart from the said 1st curved part, and moves below the winding part 84. As shown in FIG. Thereby, the first music part is released from the pressed state.
[0044]
By repeating the above-described steps, as shown in FIG. 10, a substantially annular laminated body made of the steel plates 22a is obtained. And the projection part 30 is formed of the above-mentioned some curved part of the steel plate 22a.
[0045]
In this case, if the number of windings of the steel plate 22a with respect to the winding portion 84 increases, the depth of pushing the steel plate 22a into the center of the winding portion 84 by the pressing member 82 is reduced due to the thickness of the steel plate 22a. It becomes difficult to form the protrusion 30 provided with. Therefore, the size of the pushing member 82 is changed corresponding to the number of windings of the steel plate 22a. Specifically, as the number of turns of the steel plate 22a increases, a pushing member 82 having a small contact area may be used for the steel plate 22a.
[0046]
Next, the steel plate 22a is wound by a desired number of turns along the outer peripheral surface of the laminate of the steel plates 22a on which the protrusions 30 are formed while rotating the winding portion 84. In this case, the protrusion 30 is not provided on the steel plate 22a to be wound. Thereby, the hole 32 is formed between the protrusion part 30 and the said steel plate 22a wound.
[0047]
Next, the rotation of the winding member 80 is stopped, and the outer peripheral surface of the wound steel plate 22a is joined by, for example, spot welding to form a spot welding point 96, and the spot welding point 96 is formed by wire cutting or the like. Disconnect. Thereby, the spot welding point 96 becomes the end of the laminate around which the steel plate 22a is wound.
[0048]
Next, as shown in FIG. 11, the end of the steel plate 22b having a width wider than that of the steel plate 22a is abutted with the end of the laminate, and the steel plate 22b is disposed on the side of the laminate. And the said edge part of this steel plate 22b and the outer peripheral surface of the said laminated body are joined by spot welding, for example, and the spot welding point 98 is formed.
[0049]
Next, the entire winding member 80 is rotated by the shaft portion 88, and the steel plate 22b is pulled out from the drum 62 different from the drum 62 of the steel plate 22a. As a result, the steel plate 22 b passes through the steel plate punching means 68 and is conveyed to the winding means 72. In the steel plate punching means 68, the upper punch 76 is lowered from above the steel plate 22b, and a part of the steel plate 22b is punched out by the upper punch 76 and the lower die 78 disposed below the steel plate 22b. A slot having a predetermined shape is formed with respect to 22b.
[0050]
In the steel plate punching means 68, when the slots are formed at a predetermined interval (pitch), as the number of turns of the steel plate 22b increases, the thickness of the steel plate 22b increases the thickness of the slot portion 26 in the stator core 18 (see FIG. 2). Misalignment occurs. In order to prevent this, the steel plate punching means 68 performs slot punching so that the pitch of the slots becomes large corresponding to the number of windings of the steel plate 22b.
[0051]
The steel plate 22b that has passed through the steel plate punching means 68 is wound around the side surface of the laminate of the steel plates 22a. At that time, the steel plate 22b is wound along the side surface of the laminate and the surface of the steel plate adjusting portion 86.
[0052]
Thus, when the steel plate 22b is wound a predetermined number of times in the winding portion 84, a laminate of the steel plates 22b is obtained as shown in FIG. Thereby, the slot part 26 by a some slot is formed in the steel plate 22b, and the teeth part 24 is formed between each slot part 26. As shown in FIG. Moreover, the yoke part 28 which supports each tooth | gear part 24 is formed in the steel plates 22a and 22b by the side of the steel plate adjustment part 86. FIG. And the said laminated body is joined with respect to the said laminated body, for example by spot welding, the spot welding point 100 is formed, and the tip is cut | disconnected from the spot welding point 100 by wire cutting etc. FIG. Thereby, the stator core 18 is obtained.
[0053]
The manufacturing method of the stator core 18 of the rotating electrical machine 10 according to the present embodiment is as described above. However, the steel plate 22 of the stator core 18 may be composed of the two steel plates 22a and 22b shown in FIG. You may comprise from the one steel plate 22 shown in FIG. In the steel plate 22 of FIG. 14, a part of the steel plate 22 is a steel plate 22a, and the other part is a steel plate 22b.
[0054]
In order to house the above-described stator core 18 in a case (not shown) and configure the rotating electrical machine 10 according to the present embodiment, the following manufacturing steps are further required.
[0055]
First, as shown in FIG. 2, the side surface of each tooth portion 24 in the stator core 18 is surrounded by a bobbin 34 made of an electrical insulator.
[0056]
Next, the primary side and secondary side terminals 38 and 40 are electrically connected to the respective one ends of the six conductive wires to be the windings 36 by, for example, soldering.
[0057]
Next, a single winding is wound around each of the three bobbins 34 by a predetermined number of turns, and a winding 36 is disposed around each bobbin 34.
[0058]
Next, the other ends of the three windings of the primary terminal 38 are electrically connected to the surface of the metal plate 42 by, for example, soldering. The other ends of the three windings 36 of the secondary terminal 40 are also electrically connected to the surface of the metal plate 42 different from the metal plate 42 by, for example, soldering.
[0059]
Further, the stator core 18, the bobbin 34, the winding 36 and the metal plate 42 are surrounded by resins 44 and 46 (see FIG. 1) by resin molding.
[0060]
Next, the stator core 18 covered with the resins 44 and 46 is placed in the case, and the holes 32 of the stator core 18 and the holes provided in the case are aligned. Thereafter, the bolt 52 is inserted from above the stator core 18 into the hole 32 and the hole provided in the case, and the bolt 52 is tightened with a nut (not shown). Thereby, the stator core 18 is fixedly accommodated in the case. Finally, by covering the upper part of the stator 12 with the rotor 16, the rotating electrical machine 10 according to the present embodiment is obtained.
[0061]
In the method of manufacturing the rotating electrical machine 10 according to the present embodiment, the protrusions 30 are formed by bending the steel plate 22a around the center of the winding portion 84 by the recess 90 and the pressing member 82 provided in the winding portion 84. . Furthermore, the hole 32 is formed through the protrusion 30 by winding the steel plate 22a. With this configuration, when the stator core 18 is accommodated in the case, the bolt 52 is inserted into the hole 32 of the stator core 18 and the hole provided in the case 20, and the bolt 52 is tightened with the nut. be able to. For this reason, it becomes possible to reduce the number of parts required when the stator core 18 is accommodated in the case. Further, since the stator core 18 can be accommodated in the case simply by tightening the bolt 52 and the nut, the assembling work of the rotating electrical machine 10 is simplified and the working efficiency of the assembling work is improved. Therefore, it is possible to reduce the manufacturing cost of the rotating electrical machine 10.
[0062]
Further, in the method of manufacturing the rotating electrical machine 10 according to the present embodiment, when the protrusion 30 is formed, the pressing member 82 having a different contact area with the steel plate 22a is used corresponding to the increase in the number of windings of the steel plate 22a. do it. As a result, when the steel plate 22a is bent toward the center of the winding portion 84 by the pushing member 82 and the concave portion 90, the curved portion of the steel plate 22a can be accurately formed, and the hole 32 of the stator core 18 can be accurately formed. Can be well formed.
[0063]
Next, modifications of the method for manufacturing the rotating electrical machine 10 according to the present embodiment will be described below with reference to FIGS. The modification of the manufacturing method of the rotating electrical machine 10 according to the present embodiment has substantially the same steps as the manufacturing method shown in FIGS. 4 to 14, but differs in the following points.
[0064]
That is, the protrusion 30a is formed to protrude from the outer peripheral surface of the stator core 18, and the hole 32a is provided by the protrusion 30a.
[0065]
Specifically, as shown in FIGS. 15 and 16, a plurality of holes 102 are provided at equal angles in the steel plate adjusting portion 86, and each pin member 104 implanted in the pin support plate 108 in the plurality of holes 102. Is inserted. Further, a pressing member 106 having a shape surrounding a part of the outer peripheral surface of the pin member 104 is provided outside the steel plate adjusting portion 86.
[0066]
In this modification, in order to form the protruding portion 30, first, the shaft portion 88 is rotated in a state where the end portion of the steel plate 22b is in contact with the steel plate fixing portion 92 shown in FIG. The steel plate 22b is wound a predetermined number of times on the surface.
[0067]
Next, rotation of the winding member 80 is stopped, spot welding is performed on the outer peripheral surface of the steel plate 22b, and the previous steel plate 22b is cut from the spot welding point. Thereby, the teeth part 24, the slot part 26, and the yoke part 28 are formed.
[0068]
Subsequently, after fixing the steel plate of the magnitude | size different from the steel plate 22b, for example, the steel plate 22a on the outer peripheral surface of the steel plate 22b, the winding part 84 is rotated and winding of the steel plate 22a is started. In this case, if the steel plate 22 a is wound a predetermined number of times, the steel plate 22 a is wound so as to cover the pin member 104. At this time, the pressing member 106 is pressed against the part of the steel plate 22 a covering the pin member 104 from the outside of the winding portion 84 toward the center of the winding portion 84. Thereby, the said part of the steel plate 22a curves to the outer side of the winding part 84 along the outer peripheral surface of the pin member 104. FIG.
[0069]
Further, the shaft portion 88 is rotated while the pressing state of the pressing member 106 against the steel plate 22a is maintained, and the steel plate 22a is further wound. Then, a part of the steel plate 22 a covering another pin member 104 is pressed by another pressing member 106.
[0070]
Then, while the pressing state of the pressing member 106 is maintained, the pressing member 106 is further rotated against the part of the steel plate 22a that is further rotated by the shaft portion 88 and covers the pin member 104 different from the pin member 104 described above. A pressing member 106 different from the above is pressed. On the other hand, about the pressing member 106 which curved the steel plate 22a first, it leaves | separates from the steel plate 22a, and the one part press state of the steel plate 22a is released.
[0071]
By repeating the above-described steps, a protrusion 30a is formed to protrude from the outer peripheral surface of the stator core 18 shown in FIG. 17, and a hole 32a is formed between the protrusion 30a and the laminate of the non-curved steel plate 22b. Is done.
[0072]
In this modification, if the number of turns of the curved steel plate 22a is increased, the depth of pushing the steel plate 22a into the center of the winding portion 84 by the pressing member 106 is reduced due to the thickness of the steel plate 22a. It becomes difficult to form the protrusion 30a having a shape. Therefore, the size of the pressing member 106 is changed in accordance with the number of windings of the steel plate 22a. Specifically, the pressing member 106 having a large contact area with the steel plate 22a is used as the number of turns of the steel plate 22a to be bent increases. That is, the diameter of the inner peripheral surface of the pressing member 106 facing the pin member 104 is increased.
[0073]
In the modification of the manufacturing method of the rotating electrical machine 10 according to the present embodiment, the protrusion 30a is formed by curving the steel plate 22a to the outside of the winding portion 84 by the pin member 104 and the pressing member 106. Thereby, the hole 32a is provided between the side surface of the laminated body of the non-curved steel plate 22b and the protrusion 30a. Therefore, when the stator core 18 is accommodated in the case, the bolt 52 is inserted into the hole 32a of the stator core 18 and the hole provided in the case, and the bolt 52 is tightened with a nut. Thereby, it becomes possible to reduce the number of parts required when the stator core 18 is accommodated in the case. Further, since the stator core 18 can be accommodated in the case simply by tightening the bolt 52 and the nut, the assembling work of the rotating electrical machine 10 is simplified, and the working efficiency of the assembling work is improved. Therefore, it is possible to reduce the manufacturing cost of the rotating electrical machine 10.
[0074]
Moreover, when forming the protrusion part 30a, the pressing member 106 from which a contact area with the steel plate 22a differs is used corresponding to the number of times of winding of the steel plate 22a increasing. Therefore, the steel plate 22a is appropriately curved by the pin member 104 and the pressing member 106, and the hole 32a can be formed with high accuracy.
[0075]
Of course, the axial type rotating electrical machine and the manufacturing method thereof according to the present invention are not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention. For example, although the protruding portion has a curved shape, it goes without saying that the same effect can be obtained by a bent shape.
[0076]
【The invention's effect】
The axial type rotating electric machine according to the present invention has a plurality of protrusions formed by bending a part of a steel plate from the inner peripheral surface of the stator core to the center or from the outer peripheral surface of the stator core to the outer side. A hole is formed by the protrusion.
[0077]
As a result, the stator core can be accommodated in the case simply by inserting the hole and the hole of the case accommodating the stator core with a bolt and tightening the bolt with a nut. Therefore, a reduction in the number of parts required when the stator core is accommodated in the case, an improvement in the work efficiency of the assembly work by simplifying the assembly work of the axial rotary electric machine, and a manufacturing cost in the axial rotary electric machine Can be achieved at once.
[0078]
Moreover, according to the manufacturing method of the axial type rotating electrical machine according to the present invention, when a part of the steel plate covers a plurality of recesses provided on the outer periphery of the winding unit, the winding unit faces the recess. A pressing member provided outside is moved toward the recess, and a part of the steel plate is bent along the surface of each recess by the pressing of the pressing member to form a plurality of protrusions and holes.
[0079]
As a result, the stator core can be accommodated in the case simply by inserting the hole and the hole of the case accommodating the stator core with a bolt and tightening the bolt with a nut. Therefore, a reduction in the number of parts required when the stator core is accommodated in the case, an improvement in the work efficiency of the assembly work by simplifying the assembly work of the axial rotary electric machine, and a manufacturing cost in the axial rotary electric machine Can be achieved at once.
[0080]
Further, according to the method for manufacturing an axial type rotating electrical machine according to the present invention, a plurality of pin members are arranged at predetermined intervals along the outer peripheral surface of the laminate of the steel plates wound around the winding portion, and the pins When a part of the steel sheet covers the member, a plurality of protrusions and holes are formed by bending a part of the steel sheet along the surface of each pin member by pressing the pressing member.
[0081]
As a result, the stator core can be accommodated in the case simply by inserting the hole and the hole of the case accommodating the stator core with a bolt and tightening the bolt with a nut. Therefore, a reduction in the number of parts required when the stator core is accommodated in the case, an improvement in the work efficiency of the assembly work by simplifying the assembly work of the axial rotary electric machine, and a manufacturing cost in the axial rotary electric machine Can be achieved at once.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a rotating electrical machine according to the present embodiment.
2 is an exploded perspective view showing a stator core of the rotating electrical machine of FIG. 1. FIG.
FIG. 3 is a plan view showing the stator core of FIG. 3;
FIG. 4 is a perspective view schematically showing a stator core manufacturing apparatus in the method for manufacturing a rotating electrical machine according to the present embodiment.
FIG. 5 is a perspective view of relevant parts showing a manufacturing process of a stator core.
FIG. 6 is a perspective view of relevant parts showing a manufacturing process of a stator core.
FIG. 7 is a plan view of relevant parts showing a manufacturing process of a stator core.
FIG. 8 is a plan view of relevant parts showing a manufacturing process of a stator core.
FIG. 9 is a plan view of relevant parts showing a manufacturing process of a stator core.
FIG. 10 is a perspective view of relevant parts showing a manufacturing process of a stator core.
FIG. 11 is a perspective view of relevant parts showing a manufacturing process of a stator core.
12 is a perspective view showing a stator core manufactured by the stator core manufacturing apparatus of FIG. 4; FIG.
FIG. 13 is a plan view showing a steel plate of a stator core.
FIG. 14 is a plan view showing a steel plate of a stator core.
FIG. 15 is a perspective view showing a modification of the manufacturing method of the rotating electrical machine according to the present embodiment.
16 is a side view showing a winding means of the stator core manufacturing apparatus of FIG. 15. FIG.
FIG. 17 is a plan view showing a stator core manufactured by a modification of the method for manufacturing a rotating electrical machine according to the present embodiment.
[Explanation of symbols]
10 ... Axial type rotating electrical machine 12 ... Stator
14 ... Gap 16 ... Rotor
18 ... Stator core 20 ... Case
22, 22a, 22b ... Steel plate 24 ... Teeth
26 ... Slot 28 ... Yoke
30, 30a ... Projection 32, 32a, 102 ... Hole
34 ... Bobbin 36 ... Winding
38, 40 ... terminal 42 ... metal plate
44, 46 ... Resin 48 ... Magnet
52 ... Bolt 60 ... Stator core manufacturing device
62 ... Drum 64 ... Roller
66 ... tension roller 68 ... steel plate punching means
70: Guide roller 72 ... Winding means
74, 88 ... Shaft 76 ... Upper punch
78 ... Lower mold 80 ... Winding member
82 ... Pushing member 84 ... Winding part
86 ... Steel plate adjustment part 90 ... Concave part
92 ... Steel plate fixing part 94 ... End
96, 98, 100 ... spot welding points
104 ... Pin member 106 ... Pressing member
108: Pin support plate

Claims (5)

In an axial type rotating electrical machine having a stator core formed by winding a steel plate and having a plurality of teeth portions formed on one surface,
The stator core has a plurality of protrusions formed by bending a part of the steel plate from the inner peripheral surface of the stator core toward the center or from the outer peripheral surface of the stator core toward the outer side.
The axial type rotating electrical machine, wherein the protrusion is formed with a hole by bending a part of the steel plate. Fixing the steel plate to the steel plate fixing portion provided on the outer periphery of the winding portion provided with a plurality of recesses;
A step of winding the steel sheet around the winding unit by rotating the winding unit;
By rotating the winding part, the pressing member is pressed against a part of the steel plate covering the plurality of recesses, whereby a part of the steel plate is bent along the surface of each recess, Forming a plurality of protrusions;
Winding the steel sheet along the outer periphery of the winding part, and forming a stator core by forming a hole between the plurality of protrusions and the unbent steel sheet. A manufacturing method of a rotary electric machine. In the manufacturing method of the axial type rotating electrical machine according to claim 2,
In the step of forming the protrusion, the contact area between the pushing member and a part of the steel sheet is reduced in accordance with an increase in the number of windings of the steel sheet in the winding part. Manufacturing method. Fixing the steel plate to the steel plate fixing portion provided on the outer periphery of the winding portion;
A step of winding the steel sheet around the winding unit by rotating the winding unit;
A step of arranging a plurality of pin members at a predetermined interval with respect to the winding portion along the outer peripheral surface of the wound steel plate after stopping the winding portion;
Rotating the winding part and starting winding of the steel sheet along the outer peripheral surface of the steel sheet of the winding part;
The steel plate is bent along the surface of each pin member by pressing the pressing member against the part of the steel plate covering the pin member by the rotation of the winding part. Forming a plurality of protrusions on
Fixing the end of the steel sheet wound up at a predetermined number of turns;
And a step of forming a stator core by pulling out the plurality of pin members from the protrusion and forming a hole between the protrusion and the unbent steel plate. Method. In the manufacturing method of the axial type rotating electrical machine according to claim 4,
In the step of forming the protrusion, the contact area between the pressing member and a part of the steel sheet is increased in accordance with an increase in the number of windings of the steel sheet in the winding part. Manufacturing method.

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