JP2008067459A - Laminated core and stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated core, which eliminates the need for caulking at the time of laminating core members and ensures accurate form by absorbing the accumulated error due to the thickness deflection of the core members, and a stator. <P>SOLUTION: In this laminated core 100 made by piling up a plurality of core members 1A being magnetic plate materials, thermoplastic resin 2 arranged not all over the surface of each core member 1A is partially fused, whereby each core member 1A is fixed. Especially, the thermoplastic resin 2 arranged partially at the core member 1A is arranged so that the sum of the inertial moment of the thermoplastic resin 2 in the direction of the main axis may be roughly zero. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure of a laminated core and a stator in which magnetic plate materials used for a motor, a generator, a transformer and the like are laminated.

  In a conventional method for manufacturing a laminated core, the core member is caulked and laminated at the time of punching. That is, by forming, for example, a convex portion on the front side and a concave portion on the back side in the thickness direction of the core member to be punched, the concave and convex portions are press-fitted and the core members are fixed to each other by stacking. (For example, refer to Patent Document 1).

  In addition, a method is shown in which an insulating adhesive is applied to the core member and laminated, and the core members are bonded together by applying varnish as an adhesive or immersing the laminated core member in the adhesive. (For example, refer to Patent Document 2).

JP-A-6-165447 ([0007] to [0009], FIG. 5) JP 2003-324869 ([0017], [0018], FIG. 1)

  In a method of caulking a core member that has been conventionally used as a method for manufacturing a laminated core, it is necessary to provide irregularities on the core member. However, in order to ensure the positional accuracy of the irregularities between the laminated core members, A pressing process is required. For this reason, there exists a problem that a metal mold | die becomes large, a press machine itself becomes large, a some metal mold | die is needed, and an installation becomes expensive.

  In addition, there is a problem in that, by forming an uneven portion on a thin core member or caulking, processing distortion occurs in the core member and the magnetic characteristics are deteriorated. As the product becomes smaller, the influence of the processing strain due to caulking on the magnetic characteristics becomes larger, which makes it difficult to reduce the size.

  In addition, there is a method of suppressing eddy current by laminating a thin core member in order to improve magnetic characteristics, but there is a problem that it becomes difficult to form unevenness when the plate thickness is reduced.

  Since the caulking portion is only fixed by press fitting, not all the core members to be laminated are completely fixed, and there is a portion where a gap is generated between the irregularities. For this reason, there was a problem that the core members slip relative to each other during use and generate noise.

  As a method for suppressing the deterioration of magnetic characteristics due to processing strain, there is a method of fixing the core member with an adhesive, but there is a problem that the dimensional accuracy is deteriorated because the coating thickness of the adhesive varies.

  There are also methods to immerse the laminated core member in the adhesive or to infiltrate the adhesive between the punched core members, but it is difficult to allow the adhesive to penetrate into the air in the atmosphere. Are often impregnated in a vacuum.

  In addition, when an adhesive is used, the adhesive may leak between the laminated core members, and there is a problem that the manufacturing cost becomes high, such as a step of removing the protruding adhesive.

  The present invention has been made in order to solve the above-described conventional problems, and does not require caulking when the core members are laminated, and has a highly accurate shape that absorbs accumulated errors due to thickness deviation of the core members. A laminated core and a stator are provided.

  The laminated core according to the present invention is a laminated core formed by stacking a plurality of core members, which are magnetic plate materials, by melting a partially disposed thermoplastic resin instead of the entire surface of each core member. Each of the core members is fixed.

  According to the laminated core according to the present invention, since each core member is fixed by melting the thermoplastic resin partially arranged instead of the entire surface of each core member, caulking is unnecessary, and the mold cost is reduced. Thus, a laminated core can be manufactured at a low cost.

  Further, since the heated thermoplastic resin can be thinly formed between the core members, the iron loss is reduced by reducing the eddy current loss, and the accumulated error due to the thickness deviation of the core member can be absorbed to obtain a highly accurate shape. For this reason, it is possible to reduce noises such as a beat sound emitted from the laminated core, and to obtain a motor having high energy conversion efficiency and less electromagnetic noise and vibration.

  Furthermore, since caulking is not necessary, it is possible to reduce processing strain generated in the core member and obtain a laminated core having good magnetic properties.

  In addition, by fixing the core member with a thermoplastic resin, the adhesive strength is improved and the core members do not slip relative to each other, and the shape is not easily collapsed even if an external force is applied when the coil is wound. A stator having high rigidity can be obtained. For this reason, a motor with less noise and vibration can be obtained.

  Furthermore, when the laminated core is disassembled, by heating, the thermoplastic resin is melted again, the core member is disassembled, and the recycling cost can be reduced.

Embodiment 1 FIG.
1 is a perspective view showing the structure of a laminated core according to Embodiment 1 of the present invention. FIG. 1 (a) shows a state before lamination, and FIG. 1 (b) shows a state after lamination. The laminated core 100 is configured by laminating a plurality of core members 1A that are magnetic plates such as iron plates and electromagnetic steel plates having a thickness of about 1 mm or less. The core member 1A according to the present embodiment includes a yoke part 1a, a tooth part 1b projecting in an orthogonal direction from the yoke part 1a, and a tooth tip part 1c positioned at the tip of the tooth part 1b, and has a substantially T-shape. is doing.

  In the present embodiment, as shown in FIG. 1 (a), the thermoplastic resin 2 is partially disposed between the core members 1A, not the entire surface, and the core members 1A are laminated, and FIG. ) In the direction indicated by the arrow P. Thereafter, the laminated core member 1A is placed in, for example, a heating furnace, and the thermoplastic resin 2 is thinly melted into a film shape. And as shown in FIG.1 (b), each core member 1A adheres with the thermoplastic resin 2, and the lamination | stacking core 100 is obtained. Here, as the thermoplastic resin 2, materials such as nylon, vinyl chloride, polypropylene, polystyrene, and polyethylene can be used. The melting point of the thermoplastic resin 2 is preferably 75 ° C. to 200 ° C. from the viewpoint of being able to withstand the temperature rise of the core member 1A and easy to manufacture. Further, in order to easily dispose the thermoplastic resin 2 on each core member 1A partially rather than entirely, a thread-like one can be used as the thermoplastic resin 2.

  Here, the following effects can be obtained by disposing the thermoplastic resin 2 partially rather than on the entire surface of the core member 1A. That is, even when the core member 1 </ b> A has a plate thickness deviation, the plate thickness deviation can be absorbed and a constant stacking height can be obtained over the entire surface of the stacked core 100. As shown in FIG. 2, the thermoplastic resin 2 is partially disposed not on the entire surface of the core member 1A (arranged in two rows in the example of FIG. 6), and the upper and lower core members 1A-1 and 1A-4 are parallel to each other. Pressurize to maintain state. At this time, even if there is a core member 1A-3 having a plate thickness deviation, the thermoplastic resin 2 is divided into a portion that melts into a thin film and a portion that melts relatively thick as shown in the figure, so that the core member 1A The height of the laminated core 100 is maintained at a predetermined laminated height H over the entire surface.

  Next, a suitable arrangement of the thermoplastic resin 2 on the core member 1A will be considered. In FIG. 3, the areas of the thermoplastic resin 2 disposed on the core member 1A are S1 and S2, respectively, and the centroids are G1 and G2. The distance from the centroid O of the core member 1A to the centroids G1 and G2 of each thermoplastic resin 2 is r1, r2, the density of the thermoplastic resin 2 is ρ, and the main axis passing through the centroid O (in FIG. And the angles θ1 and θ2 formed between the centroids G1 and G2 and the sum of the moments of the thermoplastic resin 2 in the principal axis direction is substantially zero, that is, ρ When S1 · r1 · sin θ1 + ρ · S2 · r2 · sin θ2 = 0 is satisfied, the placement balance of the thermoplastic resin 2 is improved, and the thickness deviation of the core member 1A is further absorbed to be constant over the entire surface of the laminated core 100. Lamination height can be obtained.

  Here, when the above equation is generalized, the area of the thermoplastic resin 2 is S1, S2,..., Sn, and the centroids are G1, G2,. The distance from the centroid O of the core member 1A to the centroids G1, G2,..., Gn of each thermoplastic resin 2 is r1, r2,..., Rn, the density of the thermoplastic resin 2 is ρ, and the centroid. When the angles θ1, θ2,..., Θn formed by the main axis passing through O and the centroids G1, G2,..., Gn are substantially zero, the sum of the moments of the thermoplastic resin 2 in the main axis direction is substantially zero. That is, when the following formula (1) is satisfied, the arrangement balance of the thermoplastic resin 2 becomes better.

  The laminated core 100 can be produced, for example, by the procedure shown in FIG. As shown in FIG. 4A, the core members 1A and the thread-like thermoplastic resin 2 are alternately laminated. Then, as shown in FIG. 4B, the core member 1A is pressurized in the stacking direction. Then, the laminated thread-like thermoplastic resin 2 and the core member 1A are left in a heating furnace or heated by a heater, for example, so that the thermoplastic resin 2 is melted as shown in FIG. The laminated core 100 can be obtained by spreading thinly on 1A. If tension is applied to the thread-like thermoplastic resin 2, the excess thermoplastic resin 2 can be separated from the core member 1 </ b> A when heated.

  FIG. 5 is a plan view showing another configuration example of the laminated core according to Embodiment 1 of the present invention. FIG. 1 illustrates an example in which the thread-like thermoplastic resin 2 is disposed on the substantially T-shaped core member 1A in a direction substantially orthogonal to the teeth portion 1b. In a substantially T-shaped configuration having a portion 1a and a tooth portion 1b projecting in a substantially orthogonal direction from the yoke portion 1a, a thread-like thermoplastic resin 2 is substantially parallel to the teeth portion 1b on the core member 1A. By arranging with good balance in the direction, the adhesive force between the core members 1A can be improved.

  FIG. 6 is a plan view showing another configuration example of the laminated core according to Embodiment 1 of the present invention. In FIG. 6, the core member 1 </ b> A has a substantially T shape having a yoke portion 1 a and a teeth portion 1 b protruding from the yoke portion 1 a in a substantially orthogonal direction, and the thread-like thermoplastic resin 2 is placed on the core member 1 </ b> A. By arranging in a cross shape in a direction substantially parallel to a direction substantially orthogonal to the tooth portion 1b, even if an external force is applied to the laminated core 100, the laminated core 100 is hardly deformed, and the dimensional accuracy can be improved.

  FIG. 7 is a plan view showing another configuration example of the laminated core according to Embodiment 1 of the present invention. In FIG. 7, the core member 1A has a substantially T shape having a yoke portion 1a and a teeth portion 1b projecting from the yoke portion 1a in a substantially orthogonal direction, and the thread-like thermoplastic resin 2 is placed on the core member 1A. By disposing in the direction inclined with respect to the direction of the tooth portion 1b, the dimension is hardly changed even when an external force is applied to the laminated core 100, and the laminated core 100 having high reliability can be obtained.

  FIG. 8 is a plan view showing another configuration example of the laminated core according to Embodiment 1 of the present invention. In FIG. 8, the core member 1 </ b> A has a substantially T shape having a yoke portion 1 a and a teeth portion 1 b protruding from the yoke portion 1 a in a substantially orthogonal direction, and the thread-like thermoplastic resin 2 is attached to the core member 1 </ b> A. It arrange | positions in the teeth direction on the yoke part 1a, and arrange | positions in the direction orthogonal to the teeth direction on the teeth part 1b of the core member 1A. Thereby, even if an external force and a moment act on the laminated core 100 from various directions, the shape can be stably maintained, and the laminated core 100 with high reliability can be obtained.

  FIG. 9 is a plan view showing another configuration example of the laminated core according to Embodiment 1 of the present invention. In this example, it is also possible to use a thermoplastic resin in the form of a thread or a powdery thermoplastic resin as the thermoplastic resin 2 and randomly arrange the thermoplastic resin 2 on the core member 1A. is there. By disposing the fine thermoplastic resin 2 on the core member 1A, the adhesive force between the core members 1A is improved and a large external force is applied by melting the thermoplastic resin 2 to a uniform thickness over the entire surface. However, the dimensions can be made difficult to change.

  In the description of the above-described embodiment, an example in which the core member has a substantially T-shape having a yoke portion and a teeth portion protruding from the yoke portion in a substantially orthogonal direction has been described. However, the shape of the core member is not limited to this, and as shown in FIG. 10A, in the rectangular or substantially U-shaped core member 10A, the thermoplastic resin 2 is balanced on each side of the rectangle or the approximately U shape. It may be well arranged. In this case, in the rectangular or substantially U-shaped core member 10A, the mechanical balance is good, and the moment resistance is increased.

  Further, as shown in FIG. 10B, the core member 11A has a substantially straight comb shape, and the thermoplastic resin 2 is divided and arranged in accordance with the number of teeth of the tooth portion. good.

  As described above, according to the present embodiment, even when there is a thickness deviation in the core member by adhering the core member with the thermoplastic resin partially arranged instead of the entire surface of the core member, A constant stacking height can be obtained over the entire surface of the stacked core by absorbing the accumulated error due to the plate thickness deviation.

  In addition, by adhering the core member with a thermoplastic resin that is partially arranged instead of the entire surface, caulking is not required, and it is possible to manufacture a laminated core at a low cost by reducing the mold cost for punching the core member. it can. In a conventional laminated core bonded by caulking, not all core members are fixed at the press-fitting portion of the uneven portion, and a gap may occur partially in the uneven portion due to a dimensional error of the core member. . However, in the present embodiment, by fixing the core member with a thermoplastic resin, a laminated core with good dimensional accuracy can be obtained without any deviation between the core members.

  In addition, when the core member is caulked, the core member is warped, the gap between the core members becomes non-uniform, eddy current loss may increase, and dimensional accuracy may deteriorate. By partially bonding the core member, a thin and uniform gap is formed, and a laminated core with good dimensional accuracy can be obtained.

  Furthermore, when the laminated core is discarded, by heating, the thermoplastic resin can be melted again and the laminated core can be decomposed, and the recycling cost can be reduced.

  As shown in FIG. 11, the thickness t of the thermoplastic resin 2 can be reduced to 5% or less of the thickness T of the core member 1A by applying pressure and heating. By ensuring 95% or more of the ratio of the total thickness of the core member to the thickness of the entire core, it is possible to obtain a laminated core with good magnetic properties without increasing the magnetic resistance.

  When the thermoplastic resin 2 is disposed on the core member 1A and the core member 1A is laminated, for example, as shown in FIG. 12A, the thread-like thermoplastic resin 2 is passed through not only the surface of the core member 1A but also the side surface. Then, by laminating while continuously winding the core member 1A, a laminated core having the thermoplastic resin 2 formed on the side surface of the core member 1A as shown in a partial side view of FIG. 12B is obtained. Can do. Usually, a film or a resin molded product is often attached to the core member 1A for insulation, and by providing a thermoplastic resin portion on the side surface of the laminated core, a resin insulation component can be easily fixed. There is an effect that can be manufactured at low cost.

Embodiment 2. FIG.
In the above embodiment, the case where the core member is substantially T-shaped or rectangular has been described. However, the present invention can be applied to a circular core member.

  13 (a) and 13 (b) are plan views showing a configuration example of the laminated core according to the second embodiment of the present invention. In the figure, the core member 12A has a substantially donut shape, and the thermoplastic resin 2 is arranged in an N-corner shape (N is an integer of 3 or more) with the outer peripheral circle of the donut shape being a circumscribed circle. In this case, a regular N-corner shape (N is an integer of 3 or more) is preferable in terms of adhesion balance. In the core member 12A, 12a is a permanent magnet arrangement hole, and 12b is a shaft insertion hole.

  FIG. 14A is a plan view showing a configuration example of the laminated core according to the second embodiment of the present invention. In the figure, the core member 12A has a substantially donut shape, and one or more rows of thermoplastic resins 2 are arranged substantially concentrically with the outer peripheral circle of the donut shape.

  FIG. 14B is a plan view showing a configuration example of the laminated core according to the second embodiment of the present invention. In the figure, the core member 12A has a substantially donut shape, and a plurality of thermoplastic resins 2 are arranged substantially radially from the center of the donut shape.

  As described above, since the thermoplastic resin 2 is arranged in a balanced manner in the substantially donut-shaped core member 12A shown in FIGS. 13 and 14, the mechanical balance of fixing the laminated core is good, and the moment resistance is increased. There is.

Embodiment 3 FIG.
By using the laminated core described in Embodiments 1 and 2, electromagnetic devices such as a stator and a transformer used for a motor, a generator, and the like can be provided.

  As shown in FIG. 15A, a laminated core 100 (see FIG. 1) in which a thread-like thermoplastic resin 2 is disposed on a substantially T-shaped core member 1A in a direction substantially orthogonal to the teeth portion 1b. Prepare several. And the lamination | stacking core 100 is arrange | positioned cyclically | annularly, each lamination | stacking core 100 is fixed by welding etc., for example, and the cyclic | annular iron core 7 used for a motor etc. is manufactured as shown in FIG.15 (b). A stator 9 shown in FIG. 16 can be obtained by winding a coil 8 around each tooth portion 1b of the annular core 7.

  In a stator manufactured by conventional caulking, not all core members are fixed at the press-fitting portion of the uneven portion of the core member, and a gap may occur partially in the uneven portion due to a dimensional error. As shown in FIG. 15, by manufacturing the stator 9 by fixing the core member 1 </ b> A with the thermoplastic resin 2, the stator 9 with good dimensional accuracy can be obtained.

  When the core member is caulked, there is a problem that the core member is warped and the gap between the core members becomes non-uniform, eddy current loss increases, and the efficiency of the motor deteriorates. On the other hand, as in the present embodiment, the gap between the laminated core members 1A is substantially reduced by disposing the thermoplastic resin 2 partially and adhering the core member 1A instead of the entire surface of the core member 1A. A uniform stator 9 with good dimensional accuracy can be obtained.

  Further, as shown in FIG. 17A, a laminated core 100 (FIG. 17) in which a thread-like thermoplastic resin 2 is disposed on a substantially T-shaped core member 1A in a direction substantially parallel to the teeth portion 1b. 5) are prepared. Then, the laminated cores 100 are fixed by, for example, welding or the like, and the stator 9 is manufactured by winding the coil 8 around the annular iron core 7 via the insulator 10 as shown in FIG. In this example, the adhesive force between the core members 1A is improved. For example, even when an external force such as a tension of the coil 8 is applied when the coil 8 is wound, the shape and dimensions of the laminated core 100 hardly change. 9 can be obtained. Further, when the insulator 10 is provided between the coil 8 and the annular core 7 when the coil 8 is wound, the thermoplastic resin 2 is formed on the side surface of the laminated core 100 as shown in FIG. In this case, for example, the insulator 10 can be easily fixed to the annular iron core 7 by heating or applying ultrasonic vibration. Further, if the insulator 10 and the thermoplastic resin 2 are made of the same material, the insulator 10 can be easily incorporated into the annular core 7.

  Further, as shown in FIG. 18 (a), a thread-like thermoplastic resin 2 is arranged on a substantially T-shaped core member 1A in a cross shape in a direction substantially parallel to a direction substantially orthogonal to the teeth portion 1b. A plurality of laminated cores 100 (see FIG. 6) are prepared. Each laminated core 100 is fixed by welding or the like to form the annular core 7, and the stator 9 is wound around the annular core 7 via an insulator 10 as shown in FIG. 18B. Manufacturing. In this case, even if an external force acts on the stator 9, the stator 9 is hardly deformed, and the dimensional accuracy can be improved.

  Further, as shown in FIG. 19 (a), the laminated core 100 (FIG. 7) in which the thread-like thermoplastic resin 2 is disposed on the substantially T-shaped core member 1A in a direction inclined with respect to the direction of the tooth portion 1b. Prepare multiple items. Then, each laminated core 100 is fixed by welding or the like, for example, to form the annular core 7. As shown in FIG. 19B, the stator 9 is wound around the annular core 7 by winding the coil 8 via the insulator 10. Manufacturing. In this case, since the shape can be stably maintained even when an external force or moment is applied from various directions during coil winding, the dimensional accuracy can be improved.

  As shown in FIG. 20, even if a stator 9 in which a thread-like thermoplastic resin 2 is arranged substantially concentrically in accordance with an annular stator shape on a substantially T-shaped core member 1A, dimensional accuracy is used. Can provide an excellent stator 9.

  Furthermore, as shown in FIG. 21 (a), a thermoplastic resin 2 in the form of a thread-like material or powder is used, and the thermoplastic resin 2 is randomly placed on the substantially T-shaped core member 1A. A plurality of laminated cores 100 (see FIG. 9) are prepared. Then, each laminated core 100 is fixed by welding or the like to form the annular core 7, and the stator 9 is wound around the annular core 7 via the insulator 10 as shown in FIG. 21B. Manufacturing. In this case, the adhesive force between the core members 1A is improved, and the stator 9 that is difficult to change in dimensions even when a large external force is applied can be obtained.

  According to the laminated core and the stator according to the present embodiment, the laminated core is created by adhering the core member with the thermoplastic resin that is partially arranged instead of the entire surface of the core member, so eddy current loss is reduced. As a result, the core loss is reduced and the accumulated error due to the thickness deviation of the core member can be absorbed to obtain a highly accurate and rigid shape, so that a motor with high energy conversion efficiency and low electromagnetic noise and vibration can be obtained. Can do.

  Further, when the laminated core is decomposed, by heating, the thermoplastic resin is melted again and the core member is decomposed, so that the decomposability of the motor and the stator is improved, and the recycling cost can be reduced.

  A motor can be obtained by combining the stator 9 of the present embodiment and the donut-shaped iron core 12 shown in the second embodiment. As shown in FIG. 22, a motor can be obtained by incorporating a permanent magnet 13 into a donut-shaped iron core 12 and energizing the coil 8 to rotate the donut-shaped iron core 12.

  As described above, by manufacturing a motor or the like using the stator 9 or the donut-shaped iron core 12 with good dimensional accuracy, the cogging torque generated due to the size and shape variations of the donut-shaped iron core 12 and the stator 9, etc. Therefore, it is possible to obtain an electric motor such as a motor or a generator with good characteristics.

Embodiment 4 FIG.
In the third embodiment, the stator 9 is manufactured using the divided laminated cores 100. However, as shown in FIG. 23, an iron core having a shape in which adjacent laminated cores 100 are connected by a thin portion 101 is circular. The present invention can also be applied to a stator 9 that is manufactured by winding the coil 8 through the insulator 10. The laminated core 100 in this case is formed by adhering with the thermoplastic resin 2 that is partially arranged rather than the entire surface of the core member 1A. According to this, it is not necessary to weld the laminated core 3, and the stator 9 having high accuracy can be obtained at low cost.

  Further, as shown in FIG. 24, adjacent laminated cores 100 are connected by joint portions 14 (which may be connected by pins or unevenness) in which adjacent core members are alternately overlapped. You may apply to the stator which uses a joint wrap system. In this case, the winding property of the coil 8 is improved, and the coil 8 can be wound with a high space factor, so that a motor can be manufactured at low cost and a motor with low power consumption can be obtained.

Embodiment 5. FIG.
In most of the examples of the first to fourth embodiments, the end of the thermoplastic resin 2 is the outer peripheral surface or inner peripheral surface of the core member 1A, or the surface where the yoke portions 1a are in contact with each other in the circumferential direction. There is a part located at the edge of the end face that affects the circularity, and if the thermoplastic resin 2 remains on the end face, it may be necessary to remove it. In the present embodiment, as shown in FIG. 25, by disposing both ends of the thermoplastic resin 2 so as to be located on the inner peripheral side of the yoke portion 1a, the residue of the thermoplastic resin 2 is formed on such an end surface. The laminated core 100 can be configured without attention. In the example of FIG. 25, the thread-like thermoplastic resin 2 is turned back on the core member 1A from the inner peripheral side of one end of the yoke part 1a toward the outer peripheral side of the yoke part 1a and then toward the distal end side of the tooth part 1b. Then, after being directed to the outer peripheral side of the yoke portion 1a on the other end side, it is arranged in a substantially M shape in a direction substantially parallel to the teeth portion so as to reach the inner peripheral side of the yoke portion 1a on the other end side. If it arrange | positions in this way, the thermoplastic resin 2 can be arrange | positioned with sufficient balance on adhesion and dynamic.

  In addition, as shown in FIG. 26, the stator 9 manufactured by arranging the iron cores in a shape in which the adjacent laminated cores 100 are connected by the thin-walled portion 101 in an annular shape and winding the coil 8 through the insulator 10. Also, the core member 1A of the present embodiment can be applied. According to this, as a jig for deforming the thermoplastic resin 2 in advance, pins (partially shown 90) for bending at positions corresponding to the inside of the laminated core 100 or between the laminated cores 100 are arranged. After being deformed while winding the thermoplastic resin 2 around the pin like a one-stroke drawing, the thermoplastic resin 2 can be disposed on the laminated core 100 with good productivity and less material waste by extruding and fusing. The thermoplastic resin 2 spreads evenly inside the laminated core 100, and a laminated core having a strong adhesive strength, and thus a highly rigid stator can be obtained.

Embodiment 6 FIG.
Further, as shown in FIG. 27, the core member 13A is formed in a substantially donut shape having an annular yoke portion 13a and a plurality of teeth portions 13b on the inner peripheral side of the yoke portion 13a. The present invention can also be applied to a stator 9 that is manufactured by winding the coil 8 via 10. That is, in the present embodiment, the thread-like thermoplastic resin 2 is annularly formed on the core member 13A while being folded back so as to form a substantially U shape at the tooth portion 13b along the annular yoke portion 13a at the yoke portion 13a. Are arranged in a single stroke. According to this, a pin (not shown) for bending at a position corresponding to the yoke portion 13a and the teeth portion 13b in the laminated core 100 is arranged on a jig for deforming the thermoplastic resin 2 in advance, The thermoplastic resin 2 can be placed on the laminated core 100 with good productivity and without waste of materials by deforming the pins 2 while winding the thermoplastic resin 2 around these pins as if written in a single stroke. At the same time, the thermoplastic resin 2 spreads evenly inside the laminated core 100, and a laminated core having a strong adhesive strength, and thus a highly rigid stator can be obtained.

It is a perspective view which shows the structure of the laminated core by Embodiment 1 of this invention. It is sectional drawing which shows the state of lamination | stacking of the core member by Embodiment 1 of this invention. It is a top view which shows the mode of arrangement | positioning of the thermoplastic resin by Embodiment 1 of this invention. It is sectional drawing which shows the manufacture example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a top view which shows the other structural example of the laminated core by Embodiment 1 of this invention. It is a partial front view which shows the lamination example of the lamination | stacking core by Embodiment 1 of this invention. It is the partial front view and side view which show the lamination example of the lamination | stacking core by Embodiment 1 of this invention. It is a top view which shows the structural example of the laminated core by Embodiment 2 of this invention. It is a top view which shows the structural example of the laminated core by Embodiment 2 of this invention. It is a figure which shows the iron core using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 3 of this invention. It is a figure which shows the motor using the laminated core by Embodiment 3 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 4 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 4 of this invention. It is a top view which shows the structural example of the laminated core by Embodiment 5 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 5 of this invention. It is a figure which shows the stator using the laminated core by Embodiment 6 of this invention.

Explanation of symbols

1A, 10A, 11A, 12A, 13A Core member, 1a Yoke part,
1b Teeth part, 1c Teeth tip part, 2 Thermoplastic resin, 7 Ring core,
8 coils, 9 stators, 10 insulators, 12 donut-shaped iron cores,
13 permanent magnet, 100 laminated core, 101 thin part, 102 joint part.

Claims (22)

A laminated core formed by stacking a plurality of core members, which are magnetic plates, and the core members are fixed by melting a partially disposed thermoplastic resin instead of the entire surface of the core members. A laminated core characterized by having 2. The laminated core according to claim 1, wherein in the thermoplastic resin partially disposed on the surface of the core member, a sum of moments of the thermoplastic resin in a principal axis direction is substantially zero. The core member has a substantially T shape having a yoke portion and a tooth portion projecting substantially orthogonally from the yoke portion, and the thread-like thermoplastic resin is substantially the same as the tooth portion on the core member. The laminated core according to claim 1, wherein the laminated core is disposed in a direction orthogonal to each other. The core member has a substantially T shape having a yoke portion and a tooth portion projecting substantially orthogonally from the yoke portion, and the thread-like thermoplastic resin is substantially the same as the tooth portion on the core member. The laminated core according to claim 1 or 2 arranged in a parallel direction. The core member has a substantially T shape having a yoke portion and a tooth portion projecting substantially orthogonally from the yoke portion, and the thread-like thermoplastic resin is substantially the same as the tooth portion on the core member. The laminated core according to claim 1, wherein the laminated core is arranged in a cross shape in a direction substantially parallel to a direction perpendicular to the direction. The core member has a substantially T shape having a yoke portion and a tooth portion projecting from the yoke portion in a substantially orthogonal direction, and the thread-like thermoplastic resin is disposed on the core member in the direction of the tooth portion. The laminated core according to claim 1, wherein the laminated core is disposed in a direction inclined with respect to the center. The core member has a substantially T-shape having a yoke portion and a teeth portion projecting from the yoke portion in a substantially orthogonal direction, and the thread-shaped thermoplastic resin is formed on the yoke portion of the core member. The laminated core according to claim 1, wherein the laminated core is disposed in a direction and is disposed in a direction orthogonal to the teeth direction on the tooth portion of the core member. The core member has a substantially T-shape having a yoke portion and a teeth portion projecting from the yoke portion in a substantially orthogonal direction, and both ends of the thread-like thermoplastic resin are the yoke portions of the core member. The laminated core according to claim 1, wherein the laminated core is disposed so as to be located on both inner peripheral sides. The laminated core according to claim 1 or 2, wherein the thermoplastic resin in a shape or a powder form obtained by cutting a thread-like material is disposed on the core member. The said core member comprises a rectangular or substantially U shape, and the said thermoplastic resin is arrange | positioned at each edge | side of the said rectangle or substantially U shape, The Claim 1 or Claim 2 characterized by the above-mentioned. Laminated core. 3. The laminate according to claim 1, wherein the core member has a substantially straight comb-like shape, and the thermoplastic resin is arranged in accordance with the number of teeth of the tooth portion. core. The core member has a substantially donut shape, and the thermoplastic resin is arranged in an N-corner shape (N is an integer of 3 or more) with an outer circumference circle of the donut shape as a circumscribed circle. The laminated core according to claim 1 or claim 2. 3. The laminated core according to claim 1, wherein the core member has a substantially donut shape, and the thermoplastic resin is arranged substantially concentrically with an outer peripheral circle of the donut shape. 4. The laminated core according to claim 1, wherein the core member has a substantially donut shape, and a plurality of thermoplastic resins are arranged radially from the center of the donut shape. The laminated core according to claim 1 or 2, wherein a thickness of the thermoplastic resin material melted and solidified is 5% or less of a thickness of the core member. The laminated core according to claim 1, wherein the thermoplastic resin material melted and solidified exists on a side surface of the core member. A stator having a laminated core formed by stacking a plurality of core members, which are magnetic plate members, and a coil attached to the laminated core via an insulator, and the stator is partially arranged instead of the entire surface of each core member The stator is characterized in that the core member is fixed by melting the thermoplastic resin formed. The stator according to claim 17, wherein in the thermoplastic resin partially disposed on the surface of the core member, a sum of moments of the thermoplastic resin in a principal axis direction is substantially zero. 10. A stator comprising a laminated core formed by stacking a plurality of core members, which are magnetic plates, and a coil attached to the laminated core via an insulator, wherein the stator is any one of claims 2 to 9. A stator in which the laminated core described in 1 is arranged in an annular shape to form an annular iron core, and a coil is wound around a tooth portion of the laminated core via an insulator. The stator according to claim 19, wherein the adjacent laminated cores are connected by a thin portion or a joint wrap. The stator according to any one of claims 15 to 19, wherein the insulator and the thermoplastic resin are made of the same material. A stator including a laminated core formed by stacking a plurality of core members, which are magnetic plate members, and a coil attached to the laminated core via an insulator, the core member comprising an annular yoke portion, A substantially donut shape having a plurality of teeth portions disposed on the inner peripheral side of the yoke portion is formed, and a thread-like thermoplastic resin is formed on the core member along the annular yoke portion. In the above-described teeth portion, the stator is arranged in a single stroke in an annular shape while being folded back so as to form a substantially U shape.

Images