JP2003018771A - Stator and its manufacturing method, and manufacturing device for core member of stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing device for a core member of a stator, which can move at high-speed and accurately position, and improves productivity. SOLUTION: The manufacturing device comprises a first and a second dies 24 and 25 which forwardly send a long steel sheet 23, and forms partly in turn a profile of an annular-connection magnetic member on the steel sheet 23; and a rotary moving die 26 which is provided aside from both dies 24 and 25, rotatably moves in a connecting direction of a yoke part by making the center of a ring center of the annular-connection magnetic member, and forms in turn the profile of each magnet pole part each having a predetermined protruding length.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating electric machine such as an electric motor, which is formed by laminating plate-shaped magnetic members and in which a gap between magnetic poles formed at tips of magnetic pole teeth portions is skewed in the laminating direction. The present invention relates to a stator, a manufacturing method thereof, and a manufacturing apparatus for a core member of a stator.

[0002]

2. Description of the Related Art Generally, in a rotating electric machine such as an electric motor, one of a stator and a rotor is skewed in order to prevent torque ripple at the time of starting or cogging during operation. However, in the case of the stator, the coil member must be wound around the magnetic pole teeth portion, but since the winding work is difficult due to the skew, for example, in Japanese Patent Laid-Open No. 1-270757, 10 and 1
As shown in FIG. 1, a protrusion 1b having a dovetail-shaped cross section is formed at the base of the magnetic pole teeth 1 having a skewed magnetic pole portion 1a, and the protrusion 1b is formed on the inner peripheral surface of the annular yoke 2. After forming the recessed portion 2a which can be fitted and winding the coil member 3 around each magnetic pole teeth 1,
The protrusion 1b is fitted into the recess 2a so that the magnetic pole teeth 1
It is disclosed that the winding work of the coil member 3 is facilitated by forming the stator integrally with the yoke 2.

[0003]

The conventional stator is constructed as described above, the magnetic pole teeth 1 can be separated from the yoke 2, and the coil members 3 are wound around the respective magnetic pole teeth 1 and then integrated. Although the winding work of the coil member 3 is facilitated by the above, the work of winding the coil member 3 around each magnetic pole tooth 1 and the protrusion 1b of each magnetic pole tooth 1 around which the coil member 3 is wound. Are required to be fitted into the recesses 2a of the yoke 2 one by one and integrated, and the work of connecting the coil members 3 of the respective magnetic pole teeth 1 and the like is required, so that the assembly is troublesome and the productivity is reduced. There was a problem.

The present invention has been made to solve the above-mentioned problems, and a stator capable of facilitating assembly work and improving productivity, and a manufacturing method thereof,
Another object of the present invention is to provide an apparatus for manufacturing a core member of a stator.

[0005]

In a stator according to claim 1 of the present invention, a plurality of yoke portions whose edge portions are annularly connected via a rotatable connecting means, and a connecting direction of the respective yoke portions. A plurality of annular connecting magnetic members each of which is formed by projecting from the central portion and magnetic pole teeth formed by projecting the magnetic pole portions so that the projecting lengths are sequentially increased or decreased by the same length in the stacking direction on both sides of the tip, It is provided with a core member formed by stacking so that a gap between adjacent magnetic pole portions is skewed in the stacking direction, and a plurality of coil members wound around each magnetic pole teeth portion of the core member. .

According to a second aspect of the present invention, in the first aspect, the skew angle at the end portion in the stacking direction is different from the skew angle at the central portion.

According to a third aspect of the present invention, in the first aspect, the skew is formed in a zigzag shape.

According to a fourth aspect of the present invention, in the stator according to any one of the first to third aspects, the connecting means is formed at a predetermined position on the front and back surfaces of the edge portion on one end side, and the connecting direction of the yoke portion is formed. And adjacent to each other are configured by a concave portion and a convex portion that can be fitted to each other.

Further, in the stator manufacturing method according to the fifth aspect of the present invention, the annular connecting magnetic member having the magnetic pole portions each having a predetermined projecting length is formed by the die moving in the connecting direction of the yoke portions. The step of forming a core member according to claim 1, which is formed by sequentially stacking, and each coupling means of the core member is bent in an inverted warp state so that each magnetic pole teeth portion is on the outside, and each magnetic pole teeth portion has a coil member. The step of winding
The step of bending the connecting means to return the core member to the original ring shape is included.

According to a sixth aspect of the present invention, there is provided a stator core member manufacturing apparatus in which a long steel plate is sequentially fed in a longitudinal direction and a contour of the annular connecting magnetic member according to the first aspect is partially formed on the steel plate. A plurality of dies that are sequentially formed, and the dies that are provided separately from each other, are rotated in the connecting direction of the yoke part about the center of the annular shape of the annular connecting magnetic member, and each of the magnetic pole parts having a predetermined protruding length. And a rotary moving die for sequentially forming a contour.

According to a seventh aspect of the present invention, in the stator core member manufacturing apparatus according to the sixth aspect, a linear motor is used as a drive source for the rotational movement of the rotational movement die.

According to an eighth aspect of the present invention, there is provided the stator core member manufacturing apparatus according to the sixth aspect, wherein a piezoelectric element is used for positioning the rotational movement of the rotational movement die.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a plan view showing a structure of a stator according to Embodiment 1 of the present invention, FIG. 2 shows a structure of a core member in FIG. 1, (A) is a plan view, (B) is a partial front view, 3C is a cross-sectional view of the main part, FIG. 3 is a perspective view showing the configuration of the core member in FIG. 2, and FIG. 4 is a plan view showing a state in which the coil member is wound around the core member in FIG.

In the figure, reference numeral 11 denotes a plurality of yoke portions made of a plate-like magnetic material, each of which has a concave portion 11a and a convex portion 11c as connecting means formed on the back surface on one end side.
The end face 11c is formed in an arc shape centering on the centers of the concave and convex portions 11a and 11b, and an end face 11d that can be fitted to the end face 11c of the adjacent yoke portion 11 is formed on the other end side. . Reference numeral 12 projects from the central portion of each yoke portion 11 in the connecting direction, and the magnetic pole portions 12a and 12b are formed on both sides of the tip so that the projecting lengths are sequentially increased and decreased by the same length in the laminating direction described later. The plurality of magnetic pole teeth portions constitute the first annular connecting magnetic member 13 together with the respective yoke portions 11.

Reference numeral 14 is a second arrangement in which each yoke portion 11 and the first annular connecting magnetic member 13 are arranged alternately in the connecting direction.
Of the annular coupling magnetic member, the protrusion lengths of the magnetic pole portions 12a and 12b are alternately laminated with the first annular coupling magnetic member 13 such that the protrusion length increases on the magnetic pole portion 12a side and decreases on the magnetic pole portion 12b side. And the yoke portions 1 adjacent to each other in the stacking direction
The concave portion 11a and the convex portion 11b of one pair are fitted to each other so as to be rotatably connected to each other to form the core member 15. Reference numeral 16 denotes a plurality of coil members wound around the magnetic pole teeth portions 12 of the core member 15, respectively. As shown in FIG. 4, the concave and convex portions 11a and 11b are rotated so that the magnetic pole teeth portions 12 are located outside. In this state, it is wound by the winding machine 17. Reference numeral 18 denotes a stator in which the core member 15 around which each coil member 16 is wound is formed into an annular shape by rotating the concave and convex portions 11a and 11b so that the magnetic pole teeth portions 12 are on the inside, contrary to the above. is there.

As described above, according to the first embodiment, the plurality of yoke portions 11 connected through the rotatable concave and convex portions 11a and 11b and the protrusion lengths l on both sides of the tip are the same. The magnetic pole portions 12a, 1 which are projected to increase or decrease only
The magnetic pole teeth portion 12 having 2b, and the first and second annular coupling magnetic members 13 and 14 which are alternately arranged in the coupling direction are sequentially stacked to form adjacent magnetic pole portions 12a,
The core member 15 is formed by forming the gap g between 12b so as to be skewed in the stacking direction.
By rotating 1b, the core member 15 is wound such that the magnetic pole teeth portions 12 are on the outer side, and the coil member 16 is wound.
By rotating so that the inside becomes an annular shape,
Since the stator 18 is obtained, the coil member 1
The winding work of 6 can be facilitated, and the labor of assembling can be omitted to improve the productivity.

In the above structure, the adjacent magnetic pole portions 12 are arranged.
The case where the gap g between a and 12b is skewed linearly in the stacking direction has been described, but the present invention is not limited to this, and the skew angle at the end in the stacking direction and the skew angle at the center are different. It may be formed at an angle. That is, even if a predetermined skew angle cannot be obtained due to dimensional constraints, the magnetic flux density at the end of the core member 15 in the stacking direction becomes smaller than that at the center due to the effect of leakage magnetic flux, and therefore, FIG.
As shown in (A), by setting the skew angle of the central portion larger than the skew angle of the end portions, it is possible to obtain a sufficient skew effect.

Further, in the linear skew, when the magnetic saturation on the tip side of the magnetic pole portions 12a and 12b becomes remarkable due to the influence of the leakage magnetic flux generated in the axial direction, the harmonics due to this magnetic saturation are suppressed. Therefore, as shown in FIG. 5B, by setting the skew angle at the central portion to be small and the skew angle at the end portion to be large, magnetic saturation can be relaxed and a sufficient skew effect can be obtained. It will be possible.

Further, as shown in FIGS. 5 (C) and 5 (D), by forming the skew in a zigzag shape, the thrust force generated in the axial direction can be reduced, and the vibration due to this thrust force can be reduced. Further, it is possible to reduce noise, and further, as shown in FIG. 5E, the magnetic pole teeth portion 12 is formed with a skew angle different from that of the magnetic pole portions 12a and 12b. If so, the skew of the magnetic pole teeth portion 12 causes the magnetic pole portions 12a and 12b.
The skew angle of can be further increased, and
The required amount of the magnet wire can be reduced as compared with the case where the magnetic poles 12a and 12b are skewed at the same angle.

Embodiment 2. FIG. 6 is a plan view showing a step of forming an annular connecting magnetic member of the core member of the stator in the second embodiment of the present invention by press punching, FIG.
Shows a configuration of an apparatus for manufacturing a core member formed by stacking the annular connecting magnetic members in FIG. 6, (A) is a front view,
8B is a plan view, FIG. 8 is a side view showing the configuration of the rotary moving die shown in FIG. 7, and FIG. 9 is a plan view showing the configuration of the main part of the rotary moving die in FIG. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

Reference numerals 21 and 22 denote an upper base plate and a lower base plate which are arranged above and below a predetermined distance, and 23 denotes both base plates 2.
A steel plate conveyed between 1 and 22 in the direction of the arrow in the drawing, 24 is arranged on the upstream side of the steel plate 23 in the conveying direction, and is an upper mold 24a installed on the upper base plate 21 and a lower mold 24b installed on the lower base plate 22. The first mold 25 and the lower mold plate 2 are arranged on the downstream side of the steel plate 23 in the conveying direction with a predetermined gap from the first mold 24 and installed on the upper base plate 21.
2 is a second mold composed of a lower mold 25b installed in 2.

Reference numeral 26 denotes a rotary moving die which is arranged between the two dies 24 and 25 so as to traverse the steel plate 23, and is arranged at a position corresponding to the central portion in the width direction of the steel plate 23 on the lower base plate 22. A thrust bearing 27, and a pair of arc-shaped guides 28 arranged on both outer sides of the lower base plate 22 in a direction crossing the steel plate 23 in an arc shape centered on the center of the thrust bearing 27, respectively.
The rotary bearing 29 is supported by the thrust bearing 27 on the lower base plate 22, and is guided by both arcuate guides 28 to rotate about the thrust bearing 27. The rotary move base 29 is disposed between the rotary move base 29 and the lower base plate 22. , The stator 30 on the lower base plate 22 side
a is disposed on the rotary moving base 29 and the linear motor 30 to which the movable elements 30b are fixed so as to face the rotary moving base 29, and is driven by the servomotor 33 via the lower die 31a and the crankshaft 32. The upper mold 31b is a metal mold 31.

Next, the operation of the core member manufacturing apparatus configured as described above will be described with reference to the drawings. First, when the upper base plate 21 is lowered by a drive source (not shown), the steel plate 2 is moved by the first mold 24 at a position indicated by an arrow A in FIG.
3 has a pilot hole formation 34, a punch 35 for forming a rotor (not shown) at a position indicated by an arrow B, and each contour of the yoke portion and the magnetic pole teeth portion at a position indicated by an arrow C. Punching 3 to form
6, 37 also at the positions indicated by arrows D and E,
Cutting and bending 38 and 39 for forming the contours of the end faces of the respective yoke portions of the first and second annular connecting magnetic members, respectively.
However, at the positions indicated by arrows F and G, the concave and convex portions of the first and second annular connecting magnetic members are formed 4 respectively.
0, 42 and punching caulking 41, 43 are performed, respectively, and at the position indicated by the arrow I by the second mold 25,
Punching 4 to form the contours of the two annular connecting magnetic members
4 is performed.

Further, in synchronism with the operations of the two molds 24 and 25, the servo motor 33 of the rotary moving mold 26 is driven and the upper mold 31b is lowered through the crankshaft 32, so that the arrow in FIG. At the position indicated by H, a cutout 45 is formed to form a contour of a predetermined protruding length of the magnetic pole portions of the two annular coupling magnetic members. And the rotary moving table 2
Reference numeral 9 indicates the linear motor 3 according to the increase or decrease in the protruding length of the magnetic pole portion.
Driven by 0, the magnetic pole portions are respectively guided by the circular arc guide 28 about the thrust bearing 27 and sequentially rotated in the directions shown by the arrows in FIG. The first and second annular connecting magnetic members are sequentially formed alternately, and these annular connecting magnetic members are fixedly integrated by the laminated punching caulking 41 and 43, as shown in FIG. 2 in the first embodiment. Finally, a core member is completed in which the gap g between adjacent magnetic pole portions is skewed in the stacking direction.

As described above, according to the second embodiment, the pilot hole formation 34, the punchings 35, 36 and 37, the cut and bend 38 and 39, the concave and convex formations 40 and 42, and the punch caulking 4, 43 are formed. First mold 24 to perform and punching 4
Separately from the second mold 25 for performing 4, the rotary moving mold 2 that is rotated by the drive of the linear motor 30 in the connecting direction of the yokes about the annular center of the two annular connecting magnetic members.
1 are provided independently, and by this movement, both annular connecting magnetic members having magnetic pole portions whose protruding lengths are increased or decreased by the same length are alternately and sequentially formed, so that high speed movement and accurate positioning are possible. Not only the productivity can be improved, but also the positional accuracy of the upper die 31b and the lower die 31a is secured, and the force applied to the arc-shaped guide 28 does not become so large. The accuracy can be improved.

In the above configuration, the linear motor 30 is used as a drive source for the rotational movement of the rotary movement die 26, but the present invention is not limited to this, and the rotational movement is performed by another drive source. You may do it. In this case, if a slight movement near the stop position is performed by the piezoelectric element, high responsiveness and accurate positioning can be achieved.

[0027]

As described above, according to claim 1 of the present invention, a plurality of yoke portions whose edge portions are annularly connected via the rotatable connecting means and the connecting direction of each yoke portion. A plurality of annular connecting magnetic members each of which is formed by projecting from the central portion and magnetic pole teeth formed by projecting the magnetic pole portions so that the projecting lengths are sequentially increased or decreased by the same length in the stacking direction on both sides of the tip, Since the core member is formed so that the gap between the adjacent magnetic pole portions is skewed in the stacking direction by stacking, and the plurality of coil members wound around each magnetic pole teeth portion of the core member are provided, It is possible to provide a stator capable of facilitating the work of winding a member and saving the labor of assembling to improve the productivity.

According to claim 2 of the present invention, in claim 1, the skew angle at the end in the stacking direction and the skew angle at the central part are formed differently, so that a sufficient skew effect can be obtained. It is possible to provide a stator capable of

According to claim 3 of the present invention, in claim 1, since the skew is formed in a zigzag shape, the thrust force generated in the axial direction can be reduced and vibration and noise can be suppressed. A stator can be provided.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the connecting means is formed at a predetermined position on the front and back surfaces of the edge portion on one end side, and is arranged in the laminating direction of the yoke portion. Since the adjacent portions are configured by the concave portion and the convex portion that can be fitted to each other, it is possible to provide a stator that can endure bending a plurality of times.

According to a fifth aspect of the present invention, the annular connecting magnetic members each having a magnetic pole portion having a predetermined projecting length are formed by the mold moving in the connecting direction of the yoke portions, and are sequentially laminated. A step of forming the core member according to claim 1, wherein each connecting means of the core member is bent in an inverted warp state so that each magnetic pole teeth portion is on the outside, and the coil member is wound around each magnetic pole teeth portion. Since the step and the step of bending the connecting means to return the core member to the original ring shape are included, the winding work of the coil member is facilitated, and the labor of assembling is reduced to improve the productivity. It is possible to provide a method of manufacturing a stator capable of performing the above.

According to a sixth aspect of the present invention, a plurality of molds for sequentially feeding a long steel plate in the longitudinal direction to partially and sequentially form the contours of the annular connecting magnetic member according to the first aspect on the steel plate. And provided separately from each die, and rotationally moves in the connecting direction of the yoke part about the center of the ring of the ring-shaped connecting magnetic member,
Since the rotational movement die for sequentially forming the contours of the magnetic pole portions each having a predetermined protrusion length is provided, high-speed movement and accurate positioning can be performed, and the productivity of the stator core member can be improved. A manufacturing apparatus can be provided.

According to a seventh aspect of the present invention, in the sixth aspect, since the linear motor is used as the drive source for the rotational movement of the rotational movement die, the stator core capable of high-speed movement and accurate positioning. An apparatus for manufacturing a member can be provided.

According to the eighth aspect of the present invention, in the sixth aspect, since the piezoelectric element is used for positioning the rotational movement of the rotational movement die, high responsiveness and accurate positioning can be obtained. An apparatus for manufacturing a core member of a stator can be provided.

[Brief description of drawings]

FIG. 1 is a plan view showing a configuration of a stator according to a first embodiment of the present invention.

2 shows the structure of the core member in FIG. 1, (A)
Is a front view, (B) is a partial front view, and (C) is a cross-sectional view of a main part.

FIG. 3 is a perspective view showing a configuration of a core member in FIG.

FIG. 4 is a plan view showing a state in which a coil member is wound around the core member in FIG.

FIG. 5 is a front view showing a configuration of the core member of the stator according to the first embodiment of the present invention, which is different from that in FIG.

FIG. 6 is a plan view showing a step of forming an annular connecting magnetic member of the core member of the stator by press punching according to the second embodiment of the present invention.

7A and 7B show a configuration of a manufacturing apparatus for a core member formed by laminating the annular coupling magnetic members in FIG. 6, FIG. 7A being a front view and FIG.

FIG. 8 is a side view showing the configuration of the rotary movement die shown in FIG. 7.

9 is a plan view showing a configuration of a main part of the rotary movement die in FIG. 8. FIG.

FIG. 10 is a front view showing the structure of a conventional stator.

11 is a perspective view showing the configuration of the magnetic pole teeth in FIG.

[Explanation of symbols]

11 yoke portion, 11a concave portion, 11b convex portion, 11
c, 11d end face, 12 magnetic pole teeth portion, 12a, 1
2b magnetic pole portion, 13 first annular connecting magnetic member, 14
2nd annular connection magnetic member, 15 core member, 16 coil member, 18 stator, 23 steel plate, 24 1st metal mold, 25 2nd metal mold, 26 rotation movement metal mold, 28 circular arc guide, 30 linear motor , 33 Servo motor.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5H002 AA07 AA09 AB01 AC08 AE06                       AE08                 5H615 AA01 BB01 BB14 BB16 PP01                       PP09 QQ19 SS03 SS04 SS05                       SS10 SS13 SS19

Claims (8)

[Claims] 1. A plurality of yoke portions whose edges are connected to each other in an annular shape via rotatable connecting means, and a plurality of yoke portions which respectively project from the central portion in the connecting direction of the respective yoke portions and which are sequentially arranged on both sides of the tip in the stacking direction. By sequentially laminating a plurality of annular connecting magnetic members, which are magnetic pole teeth portions formed by projecting magnetic pole portions so that the protrusion lengths thereof increase or decrease by the same length, a gap between adjacent magnetic pole portions is formed. A stator comprising: a core member formed so as to be skewed in a stacking direction; and a plurality of coil members wound around each magnetic pole teeth portion of the core member. 2. The stator according to claim 1, wherein the skew angle at the end portion in the stacking direction and the skew angle at the central portion are different from each other. 3. The stator according to claim 1, wherein the skew is formed in a zigzag shape. 4. The connecting means is formed at a predetermined position on the front and back surfaces of the edge portion on one end side, and is composed of a concave portion and a convex portion that can be fitted to each other adjacent to each other in the stacking direction of the yoke portion. The stator according to any one of claims 1 to 3, characterized in that. 5. The core member according to claim 1, wherein an annular connecting magnetic member having magnetic pole portions each having a predetermined projecting length is formed by a die moving in the connecting direction of the yoke portion and sequentially laminated. And a step of bending the connecting means of the core member in a reverse warped state so that the magnetic pole taste portions are on the outside, and winding the coil member around the magnetic pole taste portions, and bending the connecting means. And a step of returning the core member to the original ring shape. 6. A plurality of metal molds for feeding a long steel plate in order in a longitudinal direction to partially form the contours of the annular connecting magnetic member according to claim 1 on the steel plate separately from the respective metal molds. And a rotary moving die for rotating and moving in the connecting direction of the yoke part around the annular center of the annular connecting magnetic member to sequentially form the contour of each magnetic pole part having a predetermined protruding length. An apparatus for manufacturing a core member of a stator, comprising: 7. The apparatus for manufacturing a core member of a stator according to claim 6, wherein a linear motor is used as a drive source for the rotational movement of the rotational movement die. 8. The apparatus for manufacturing a core member of a stator according to claim 6, wherein a piezoelectric element is used for positioning the rotational movement of the rotational movement die.