JP4102797B2 - Armature core, linear motor and manufacturing method thereof - Google Patents

Description

  The present invention relates to a structure and a manufacturing method of an armature core of an armature winding portion of a linear motor.

  A linear motor having a thrust generating surface on one side of the linear motor (hereinafter referred to as a one-sided linear motor) (see, for example, Patent Document 1) and a linear motor having thrust generating surfaces on both sides of the linear motor (hereinafter referred to as a double-sided linear motor). In an armature winding portion (referred to as Patent Document 2) (referred to as a motor), armature cores having different shapes that are produced exclusively for each are used. Moreover, the double-sided linear motor has a structure in which two windings are provided on both sides of one armature core, for example. Furthermore, the double-sided linear motor connects, for example, adjacent armature cores by engagement of dovetail grooves by insertion from the axial direction.

JP 2000-217334 A ([Claim 1], FIG. 1) Japanese Patent Laid-Open No. 11-178310 ([0011], FIG. 8)

  As described above, conventionally, an armature core has to be produced exclusively for the structures of a single-sided linear motor and a double-sided linear motor, and productivity is poor. Further, in the double-sided linear motor, it is necessary to dispose the winding nozzles on both sides of the teeth, so that the core gripping mechanism and the like are complicated and the equipment is expensive. In addition, when winding one side at a time, it is necessary to change the direction of the teeth, the workability is poor, the chucking of the teeth wound on one side becomes difficult, and there is a high possibility of damage to the winding. For this reason, there may be a problem that the quality of the linear motor is not stable. Furthermore, when connecting adjacent armature cores, it is necessary to insert them from the stacking direction of the armature cores to engage the dovetail grooves, which makes it difficult to work.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to be able to configure a one-sided linear motor and a two-sided linear motor using the same armature core.

  It is another object of the present invention to provide a linear motor in which simple winding equipment can be used as a winding nozzle arrangement and a core gripping mechanism, and high-density winding is applied at low cost.

The linear motor according to the present invention includes a field magnet portion in which a plurality of magnets are arranged to face each other in two rows, and an armature winding portion that is arranged through an air gap between the magnets. In
The armature core of the armature winding part is
A pair of first core member and second core member having a core back portion and a tooth portion are provided, each tooth portion has the same height, and the core back portions of the pair of first and second core members Among them, a notched portion or a protruding portion is provided on one abutting end surface, and a protruding portion or a notched portion that engages with the notched portion or the protruding portion is provided on the other abutting end surface,
The first and second core members are stacked on one side so that the teeth portions are aligned and connected in the stacking direction, and the first and second core members stacked on the other side are paired with the first and second core members. And the second core member is laminated so that the teeth portions are aligned and connected in the lamination direction,
The core back portions of the first and second core members on both sides are connected so as to come into contact with each other, and a coil is wound around the tooth portions laminated on both sides,
The armature winding portion is characterized in that a plurality of the armature cores are arranged in a row and fixed on a fixing member.

  According to the linear motor of the present invention, a single-sided linear motor and a double-sided linear motor can be configured with the same armature core, and there is no need to manufacture a dedicated armature core for each. Can be improved. Moreover, the winding equipment with a simple arrangement | positioning of a winding nozzle and a core holding | grip mechanism can be used. Furthermore, since the core back part of the armature core can be overlapped and crimped with a press or the like, the end part of the core back part is not bent, and a linear motor with a high-precision armature core is manufactured. can do.

Embodiment 1 FIG.
1 is a plan view of a double-sided linear motor 11 according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view of the linear motor 11 in FIG. FIG. 3 is a plan view showing the armature winding portion 2 of the linear motor 11 of FIG.

  In FIG. 1, the linear motor 11 arranges a plurality of permanent magnets 31 in two rows so that the polarities adjacent to each other are different, and the field yoke 32 is arranged such that the two rows of permanent magnets 31 face each other at a predetermined interval. The field portion 3 is fixed, and the armature winding portion 2 is disposed between the two rows of permanent magnets 31 via the air gap 4. As shown in FIGS. 1 and 2, the armature winding portion 2 includes a plurality of substantially cross-shaped armature cores 22 around which the coils 21 are wound, arranged in a row on the fixing member 25, A hole 23 provided in the core 22 and a fixing member 25 are fastened and fixed with screws 24. Further, as shown in FIG. 3, the armature core 22 includes a core back portion 222 and a teeth portion 221 extending outward from the core back portion 222, and a coil is wound around the tooth portion 221. In addition, a hole 23 is provided at the center position of the core back 222.

  As will be described below, the armature core 22 is configured by stacking a plurality of core members such as electromagnetic steel plates. 4 is a view showing the core member 220 constituting the armature core 22 of FIG. 3, FIG. 4 (a) is a plan view, and FIG. 4 (b) is XI-XI of the core member 220 of FIG. 4 (a). It is sectional drawing. In the figure, the core member 220 constituting the armature core 22 is composed of two types of core members 220A and 220B having teeth portions 221A and 221B having the same height and core back portions 222A and 222B having different heights. Has been. That is, in FIG. 4A, the height dimension of the core back part 222A of the first core member 220A is W1 (W1 ≧ 0), and the height dimension of the core back part 222B of the second core member 220B is W2 ( If W2 ≧ 0), then W1> W2 (W1 ≠ W2). Further, assuming that the distance Wh from the right end of the core back portion 222A of the first core member 220A to the left end of the hole 23 is Wh> W2, the hole 23 is formed when the first core member 220A and the second core member 220B are combined. Is located at the center position of the armature core 22. The second core member 220B is provided with a protrusion 224 at the upper right corner of the core back portion 222B, and the first core member 220A is provided with a notch 225 at the upper left corner of the core back portion 222A. ing. Therefore, when the first core member 220A and the second core member 220B are combined, the end surfaces of the core back portions 222A and 222B can be positioned in the illustrated plane direction.

  In addition, as shown in FIG. 5, the notch part 226 is provided in the core back part 222B right end up-and-down corner part of the 2nd core member 220B, and the protrusion part is provided in the core back part 222A left end up-and-down corner part of the first core member 220A. When the first core member 220A and the second core member 220B are combined, the end surfaces of the core back portions 222B and 222A may be positioned. In addition, the number and shape of the protrusions and notches shown in FIGS. 4 and 5 are not limited to this, and the number of protrusions and notches may be increased. An arc shape or the like may be used. In addition, when it is not necessary to position, you may make it a linear core back part end surface without providing a projection part and a notch part.

  Further, as shown in FIG. 6, the height dimension W2 of the core back portion 222B of the second core member 220B may be zero. That is, the core back portion of the second core member 220B having the smaller core back portion height dimension may be omitted, and only the teeth portion 221B may be configured.

  Next, a method of configuring the armature core 22 using the two types of core members 220 (first core member 220A and second core member 220B) shown in FIG. 4 will be described. 7A and 7B are views showing a state in which the core member 220 shown in FIG. 4 is laminated. FIG. 7A is a plan view, and FIG. 7B is a cross-sectional view taken along line XII-XII in FIG. 8 is a view showing a state in which the laminated plates of the core member 220 in FIG. 7 are joined, FIG. 8 (a) is a plan view, and FIG. 8 (b) is a cross-sectional view along XIII-XIII in FIG. 8 (a). It is.

  As shown in FIG. 7, the two types of core members 220A and 220B in FIG. 4 are arranged, for example, with the first core member 220A on the right side and the second core member 220B on the left side in the uppermost layer. In the second layer, the first core members 220A are alternately stacked so that the first core members 220A are arranged on the left side in the figure and the second core members 220B are arranged on the right side in the figure. Then, as shown in FIG. 8, the core members 220 (220A, 220B) of FIG. 7 are stacked, and the core members 220 (220A, 220B) stacked on the right and left sides of the figure by the caulking 230 are stacked in the stacking direction. Connect to In this case, it is preferable to perform the connecting operation by the caulking 230 in a state in which a part or all of the height direction protruding portion 231 of the core back portion 222A overlaps in the stacking direction.

  Note that the number, shape, and the like of the caulking 230 are not limited to those in FIG. Further, regarding the method of laminating the core member 220, in FIGS. 7 and 8, the first core member 220A and the second core member 220B are laminated with the left and right directions alternately changed for each layer. As shown in FIG. 9, (n =) 4 divisions in the lamination direction, and (n =) 2 divisions in the lamination direction as shown in FIG. 10, 1 / n of the core lamination width (n is an integer of n ≧ 2). It is good also as a structure which laminated | stacked by the core lamination | stacking width | variety by changing the direction of right and left alternately by laminating | stacking in the same direction on these dimensions. The first core member 220A and the second core member 220B may not be stacked on the left and right sides by the same number, or may be configured by stacking different numbers.

  Here, the two types of core members 220A and 220B shown in FIG. 4 or FIG. 5 may be manufactured by stamping separately. However, when the core members 220 shown in FIG. The connecting operation by the caulking 230 or the like is performed in a state where part or all of the height direction protruding portion 231 of the back portion 222A overlaps in the stacking direction. Next, the reason will be described with reference to FIG. FIG. 11 is a view for explaining a problem that may occur when the laminated body of the core member 220 in FIG. 7 is separately connected on both the left and right sides, and is a cross-sectional view corresponding to FIG. Here, since the two types of core members 220A and 220B are alternately laminated on each layer on the left and right sides, pressure is applied by a press or the like, and the caulking 230 is coupled to connect the laminated plates. The vertical protrusion 231 may be bent. For this reason, it is very difficult to assemble these laminated core members divided into left and right so that the core height direction protruding portions 231 are alternately overlapped, and the core member can be assembled with high accuracy. As a result, there is a problem that the caulking 230 is peeled off. In addition, as shown in FIG. 12, even if the other laminated structure (FIG. 12 is a (n =) two-divided laminated structure), the combined end of the core member is bent, and the core assembly cannot be accurately produced. May be worse. On the other hand, as shown in FIGS. 8, 9, and 10, if the core members 220 on the left and right sides are connected in the stacking direction in a state where a part or all of the core height direction protrusions 231 overlap each other, As a result, the workability of the assembly is improved.

  Next, a method for creating the armature winding part 2 using the armature core 22 manufactured according to FIG. 8 will be described. Here, the armature core 22 of FIG. 8 is once divided into left and right sides and separately coiled as shown in FIG. That is, the core back portions 222A and 222B on both the left and right sides of the armature core 22 are fixed to the core gripping portion 5 of the winding equipment one by one, and the coils 21 are wound around the respective tooth portions 221 by the nozzle 6. Therefore, it can be wound with high density with simple equipment.

  In this case, as shown in FIG. 14A, winding may be applied to one laminated armature core 22, but as shown in FIG. 14B, the armature core of FIG. By arranging a plurality (22 in the figure) of 22 block bodies in the core stacking direction and winding the coil 21 at the same time, an armature core having a predetermined core stacking width can be created. According to this, it becomes possible to easily manufacture a linear motor having a core lamination width that is several times the number of armature cores arranged at the time of winding, and the productivity of the linear motor is increased.

  Further, the core gripping mechanism or the winding method is not limited to the method described in the present embodiment. For example, chucking can be performed using the holes 23 provided in the armature core 22, and the winding method is also performed by disposing the nozzles 6 on both sides of the tooth portion 221 of the armature core 22 in FIG. When winding or winding one side at a time, the armature core 22 of FIG. 8 is chucked as it is without being divided into left and right, and the tooth portions 221 on both sides are changed by changing the direction of the armature core 22. It may be wound.

  Then, as shown in FIG. 15, the armature core around which the coil 21 is wound is arranged on both the left and right sides so that the core back portions face each other, and the first core member 220A and the second core member on both the left and right sides. The core back portions 222A and 222B of 220B are slid and connected until the end faces come into contact. Thereafter, as shown in FIGS. 1 and 2, a plurality of armature cores 22 shown in FIG. 15B are arranged in a row on the fixing member 25, and the holes 23 and the fixing member 25 provided in the armature core 22 are arranged. The two-sided linear motor 11 is configured by being fastened and fixed with screws 24.

  FIG. 16 is a plan view of the one-sided linear motor 12 according to Embodiment 1 of the present invention, and FIG. 17 is a cross-sectional view of the linear motor 12 in FIG. The linear motor 12 includes a field portion 3 fixed to a field yoke 32 so that a plurality of permanent magnets 31 are arranged in a row so that adjacent polarities are different from each other, and the permanent magnet 31 via an air gap 4. The armature windings 2 are arranged opposite to each other. The armature winding section 2 divides the armature core 22 shown in FIG. 15B into left and right sides, aligns the armature cores 22 in a line as shown in FIG. The hole 23 provided in the armature core 22 and the fixing member 25 are fastened and fixed with screws 24.

  In the above-described double-sided linear motor 11 and single-sided linear motor 12, any one of the armature winding part 2 and the field part 3 may be a mover or a stator, and can be arbitrarily selected. it can. Further, items other than those described above, for example, the number and arrangement of the coils 21 and the structure of the field magnet portion 3 are not limited.

  In the above description, the armature core 22 and the fixing member 25 are fixed by fastening the screw 24. However, the armature core 22 and the fixing member 25 may be fastened and fixed by filling the hole 23 with a molding material or the like. Furthermore, the core back portion of the laminated core member may be fixed by caulking or welding.

  As described above, according to the present embodiment, the armature core 22 can be applied to both the double-sided linear motor 11 and the single-sided linear motor 12, and separately separate armature cores for the double-sided and single-sided types, respectively. There is no need to manufacture, and productivity can be improved. Moreover, when winding around the armature core 22, it is possible to use a winding equipment with a simple arrangement of the nozzle 6 and the core gripping portion 5, and the equipment is inexpensive and can be wound by a method with good workability. It becomes.

  Further, since the projecting portion 224 and the notch portion 225 are provided on the core back portions 222B and 222A, in the case of the double-sided linear motor, when the core back portions 222A and 222B of the core members 220A and 220B on the left and right sides are arranged together. The positioning of the mutual core members 220A and 220B is facilitated, and the assembly workability is improved. In the case of a one-sided linear motor, it can be used for positioning the core members 220A and 220B and the fixing member 25, and productivity can be improved.

  Further, since the core back portions 222A and 222B of the core members 220A and 220B on both the left and right sides are overlapped with each other by pressing or the like, the end surfaces of the core back portions of the core members 220A and 220B are not bent and manufactured with high accuracy. And the assembly workability is improved.

Embodiment 2. FIG.
18 is a plan view showing an armature winding portion 2 according to Embodiment 2 of the present invention, and FIG. 19 is a plan view showing an armature core 22 of FIG. In the armature core 22 according to the second embodiment, as shown in FIG. 19, on the side surface of the core back portion 222, an engagement portion 250 is provided at one end, and a joint portion 251 is provided at the other end. The engaging portion 250 is composed of a wide-width convex portion provided across both end surfaces of the core back portion 222A and the core back portion 222B. Moreover, the said junction part 251 is comprised by the dovetail-shaped recessed part provided ranging over the both end surfaces of the core back part 222A and the core back part 222B. Other configurations are the same as those of the armature core 22 described in the first embodiment.

  Next, a method for creating the armature winding part 2 using the armature core 22 of the present embodiment will be described. As in the first embodiment, the armature core 22 can be divided into left and right sides and wound separately, respectively, as in the first embodiment, but in the second embodiment, a method of winding without dividing is described. To do.

  First, as shown in FIG. 20 (a), the core back portion 222 is set so that the teeth portion 221B on one side is exposed in a state where both end surfaces of the core back portions 222 on both the left and right sides of the armature core 21 are in contact with each other. Chucking is performed by the core gripping portion 5. And the coil 21 is wound by the nozzle 6 around the teeth part 221B of one side. When the winding of the tooth portion 221B on one side is finished, the core back portion 222 is chucked by the core gripping portion 5 so that the other tooth portion 221A is exposed as shown in FIG. Then, the coil 21 is wound around the tooth portion 221A on the other side, and coil winding is performed.

  Further, the core back portion 222 is chucked in a state where the tooth portions 221 on both sides are exposed, and the nozzles 6 are provided on both sides, whereby winding can be performed at a time. In these winding methods, there is no need to combine armature cores divided into left and right after coil winding, so that the assembly workability deteriorates when the armature core is deformed by coil winding. It can be avoided.

  As in the first embodiment, a plurality of armature cores 22 are arranged in the core lamination width direction and fixed to the core gripping part 5, and the coil 21 is wound around the teeth part 221 by the nozzle 6. If an armature core with a core lamination width that is a predetermined standard is created, it becomes possible to easily manufacture a linear motor that has a core width that is several times the number of armature cores that are arranged at the time of winding. Become.

  Further, the core gripping mechanism or the winding method is not limited to the method described in the present embodiment, and for example, chucking can be performed using the hole 23 provided in the armature core 22. In the coil winding method, the winding is performed in the state of being divided into the left and right as in the case of the first embodiment, so that it can be wound with inexpensive equipment with good workability.

Then, when a plurality of armature cores 22 coiled in this way are arranged in a row and arranged on the fixing member 25, as shown in FIGS. 21A and 21B, the armature cores arranged on both sides are arranged. By sliding one of the two members 22 in the X1 and X2 directions, the engaging portion 250 provided in the core back portion 222 of the adjacent armature core 22 and the joint portion 251 are engaged. Note that when the armature core 22 is slid, the core back portion 222 is kept in an overlapping state in the stacking direction. By doing so, the operation | work which joins the core back member divided | segmented into both sides so that it may overlap again becomes unnecessary. Then, as in the first embodiment, a hole 23 provided in the armature core 22 and a fixing member 25 are fastened and fixed with screws 24 to constitute a double-sided linear motor.

  As shown in FIG. 18, there are no adjacent armature cores on the outer surface of the armature cores 22 on both sides arranged side by side, and therefore it is not necessary to provide the engaging portion 250 or the joint portion 251. Further, the shape of the engaging portion 250 or the joining portion 251 is not limited to the shape shown in the figure.

  In FIG. 21, the engaging portion 250 and the joint portion 251 are provided at the center position of the core back portion 222, but may be provided at a position deviating from the center position of the core back portion 222 as shown in FIG. 22. .

  FIG. 23 is a plan view of the armature winding part 2 of the one-sided linear motor according to the second embodiment of the present invention. In the armature winding section 2, the armature core 22 shown in FIG. 21 is divided into left and right parts, and a plurality of them are aligned in a line and arranged on the fixing member 25 as shown in FIG. When arrange | positioning to the fixing member 25, it arranges and arranges in order so that the engaging part 250 and the junction part 251 of an adjacent armature core 22 may engage. The hole 23 provided in the armature core 22 and the fixing member 25 are fastened and fixed with screws 24.

  In the linear motor described above, either the armature winding part 2 or the field part 3 may be a mover or a stator, and can be arbitrarily selected. Furthermore, items other than those described above, such as the number and pitch of the armature coils 21 and the structure of the field magnet portion 3, are not limited at all.

  Further, although the armature core 22 and the fixing member 25 are fixed by fastening the screws 24, they may be fastened and fixed by filling the holes 23 with a molding material or the like.

  As described above, according to the present embodiment, in the double-sided linear motor, adjacent armature cores can be easily coupled by sliding the left and right armature cores, and the assemblability is good. In the case of a one-sided linear motor, by arranging the armature cores in order while connecting the engaging portion and the joint portion, adjacent armature cores can be easily connected, and the assembly workability is good.

It is a top view which shows the double-sided linear motor by Embodiment 1 of this invention. It is XX sectional drawing of the linear motor of FIG. It is a top view which shows the armature winding part of the linear motor of FIG. It is the top view and sectional drawing which show the core member which comprises the armature core by Embodiment 1 of this invention. It is a top view which shows the other example of the core member which comprises the armature core by Embodiment 1 of this invention. It is a top view which shows the other example of the core member which comprises the armature core by Embodiment 1 of this invention. It is the top view which shows a mode that the core member of FIG. 4 was laminated | stacked, and XII-XII sectional drawing. It is the top view which shows a mode that the core member of FIG. 7 was couple | bonded in the lamination direction, and XIII-XIII sectional drawing. It is a figure which shows the other lamination | stacking method of the core member of FIG. It is a figure which shows the other lamination | stacking method of the core member of FIG. It is a figure explaining the problem which may occur when the lamination | stacking of the core member of FIG. 7 is connected separately on right and left. It is a figure explaining the problem which may occur when two types of right-and-left types are connected separately between lamination | stacking of the armature core 22 of FIG. 10, and is sectional drawing corresponding to FIG. It is a top view which shows a mode that it winds around the armature core of FIG. It is sectional drawing which shows the state after arrange | positioning one armature core of FIG. 8 in the core lamination width direction, and giving a winding, and the state after arrange | positioning two and applying a winding. FIG. 9 is a plan view showing a method of connecting the left and right armature cores after winding the armature core of FIG. 8 separately on the left and right sides. It is a top view of the one-sided linear motor by this Embodiment 1. FIG. It is XX-XX sectional drawing of the linear motor of FIG. It is a top view which shows the armature winding part by Embodiment 2 of this invention. It is a top view which shows the armature core of FIG. It is a figure which shows the method of winding, without dividing | segmenting right and left of the armature core of FIG. It is a top view which shows the method of connecting the armature core which adjoins, when assembling the armature core by Embodiment 2 of this invention. It is a top view which shows the process of connecting an adjacent armature core when assembling the other armature core by Embodiment 2 of this invention. It is a top view of the armature winding part of the one-sided linear motor by Embodiment 2 of this invention.

Explanation of symbols

11, 12 linear motor, 2 armature winding part, 21 coil, 22 armature core,
25 fixing member, 220 core member, 220A first core member,
220B second core member, 221, 221A, 221B teeth portion,
222, 222A, 222B Core back part, 224, 227 Projection part,
225, 226 Notch, 230 caulking, 231 protrusion, 250 engaging part,
251 Joint.

Claims (11)

In an armature core having a core back portion and a tooth portion extending from the core back portion, and a coil wound around the tooth portion,
A pair of first core member and second core member having a core back portion and a tooth portion, wherein each of the tooth portions has the same height dimension;
Of the core back portions of the pair of first and second core members, a notch or projection is provided on one abutting end surface, and the other abutting end surface is engaged with the notch or projection. Protruding parts or notches to be
The first and second core members are stacked on one side so that the teeth portions are aligned and connected in the stacking direction, and paired with the stacked first and second core members on the other side. The first and second core members are stacked so that the teeth portions are aligned and connected in the stacking direction,
An armature core , wherein the core back portions of the first and second core members on both sides are connected so as to contact each other, and coils are wound around the tooth portions stacked on the both sides . In a linear motor including a field magnet portion in which a plurality of magnets are arranged to face each other in two rows, and an armature winding portion arranged through an air gap between the magnets,
The armature core of the armature winding part is
A pair of first core member and second core member having a core back portion and a tooth portion, wherein each of the tooth portions has the same height dimension;
Of the core back portions of the pair of first and second core members, a notch or projection is provided on one abutting end surface, and the other abutting end surface is engaged with the notch or projection. Providing a protruding part or notch,
The first and second core members are stacked on one side so that the teeth portions are aligned and connected in the stacking direction, and paired with the stacked first and second core members on the other side. The first and second core members are stacked so that the teeth portions are aligned and connected in the stacking direction,
The core back portions of the first and second core members on both sides are connected so as to contact each other, and a coil is wound around the tooth portions laminated on both sides,
In the linear motor, the armature winding portion includes a plurality of armature cores arranged in a row and fixed on a fixing member. In the core back portions of the first and second core members, an engaging portion is provided on one side end surface, and a joint portion that engages with the engaging portion is provided on the other side end surface. The armature core according to claim 1. In the core back portions of the first and second core members, an engaging portion is provided on one side end surface, and a joint portion that engages with the engaging portion is provided on the other side end surface. The linear motor according to claim 2. The engaging portion is a convex portion provided across both end surfaces of the core back portions of the first and second core members, and the joint portion is a core back portion of the first and second core members. The armature core according to claim 3, wherein the armature core is a recess provided across both end faces. The engaging portion is a convex portion provided across both end surfaces of the core back portions of the first and second core members, and the joint portion is a core back portion of the first and second core members. The linear motor according to claim 4, wherein the linear motor is a recess provided across both end faces. 2. The armature core according to claim 1, wherein the first and second core members are caulked by a press as means for connecting the first and second core members in the stacking direction. The linear motor according to claim 2, wherein the first and second core members are caulked by a press as means for connecting the first and second core members in the stacking direction. In an armature core having a core back portion and a tooth portion extending from the core back portion, and a coil wound around the tooth portion,
A pair of first core member and second core member having a core back portion and a tooth portion, wherein each of the tooth portions has the same height dimension;
Of the core back portions of the pair of first and second core members, a notch or projection is provided on one abutting end surface, and the other abutting end surface is engaged with the notch or projection. Providing a protruding part or notch,
The first and second core members are stacked on one side so that the teeth portions are aligned and connected in the stacking direction, and paired with the stacked first and second core members on the other side. The first and second core members are stacked so that the teeth portions are aligned and connected in the stacking direction,
The core back portions of the first and second core members on both sides are connected to come into contact with each other, and a coil is wound around a tooth portion of an armature block in which a plurality of the stacked armature cores are stacked. An armature core characterized by that. In a manufacturing method of an armature core having a core back portion and a teeth portion extending from the core back portion, and a coil wound around the teeth portion,
A pair of first core member and second core member having a core back portion and a tooth portion, wherein each of the tooth portions has the same height dimension;
Of the core back portions of the pair of first and second core members, a notch or projection is provided on one abutting end surface, and the other abutting end surface is engaged with the notch or projection. Providing a protruding part or notch,
The first and second core members are laminated on one side so that the teeth portions are aligned, and the first and second cores are paired with the laminated first and second core members on the other side. A step of laminating the members so that the teeth portions are aligned;
The first and second core members on both sides are connected in the stacking direction with a part or all of the core back portions of the first and second core members stacked on the both sides overlapping in the stacking direction. A method of manufacturing an armature core, comprising: a step. In a method of manufacturing a linear motor including a field magnet portion in which a plurality of magnets are arranged to face each other in two rows, and an armature winding portion that is arranged through an air gap between the magnets,
A pair of first core member and second core member having a core back portion and a tooth portion, wherein each of the tooth portions has the same height dimension;
Of the core back portions of the pair of first and second core members, a notch or projection is provided on one abutting end surface, and the other abutting end surface is engaged with the notch or projection. Providing a protruding part or notch,
The first and second core members are stacked on one side so that the teeth portions are aligned and connected in the stacking direction, and the first and second core members stacked on the other side are paired with the first core member. Laminating the first and second core members so that the teeth portions are aligned and connecting them in the laminating direction;
A step of winding a coil around the tooth portions stacked on both sides in a state where the core back portions of the first and second core members on both sides are in contact with each other;
A method of manufacturing a linear motor, comprising a step of arranging a plurality of armature cores around which the coil is wound in a line and fixing the armature cores on a fixing member.

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