JP2007236152A - Linear motor armature and linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear motor having a divided magnetic pole teeth structure and superior assemblability. <P>SOLUTION: The linear motor includes a plurality of magnetic pole teeth 31, arranged sequentially in the motor drive direction. The magnetic teeth 31 are constituted of a yoke 32, abutting against adjacent magnetic pole teeth 31 and a tooth part 33 formed projectingly from the yoke 32 on both sides, in a direction substantially at right angles to the motor drive direction, and the magnetic pole teeth 31 includes first magnetic pole teeth 311 and second magnetic pole teeth 312, arranged adjacent to the first magnetic teeth 311. The first magnetic pole teeth 311 are divided, in a direction substantially at right angles to the motor drive direction in the yoke 32, to form a pair of first divided teeth 311A, 311B and the teeth 311A, 311B which are connected and fixed by the second magnetic pole teeth 312. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an armature structure of a linear motor used in general industrial machines and a linear motor using the armature structure.

  Conventionally, in the structure in which the thrust generating surfaces are formed on both sides of the linear motor, the magnetic pole teeth are individually separated in order to perform winding with high density. And it has a structure which winds two coil | windings on both sides of the tooth | gear part of magnetic teeth. The individual magnetic teeth are connected and fixed by using dovetail engagement by insertion from the stacking direction of the laminated plates, and are further firmly assembled through bolts in holes provided in the magnetic teeth.

JP-A-11-178310 (page 12, FIG. 17) Japanese Patent Laying-Open No. 2004-23954 (page 7, FIG. 8)

  In the above conventional linear motor, the divided magnetic teeth are connected by engagement of dovetail grooves. Therefore, if the stack thickness of the magnetic teeth laminate is increased, the engagement of dovetail grooves is deteriorated and assembly work is performed. Sexuality deteriorates. Further, since the divided magnetic pole teeth are assembled by sliding in the stacking width direction, there is a possibility that the laminated plate may be peeled off or the coil may be contacted and damaged, resulting in a decrease in reliability. Further, when the divided magnetic pole teeth are firmly fixed, it is necessary to fasten and fix the bolts to all the magnetic teeth, resulting in poor productivity and an increase in the number of parts.

  Further, in the conventional linear motor, it is necessary to dispose the winding nozzles on both sides of the magnetic teeth, which complicates the gripping mechanism of the magnetic teeth and makes the equipment expensive. In addition, when winding one side of the magnetic teeth, it is necessary to change the direction of the magnetic teeth, resulting in poor workability. Furthermore, it is difficult to chuck the magnetic teeth that are wound on one side, which may cause damage to the windings, resulting in a problem of unstable quality.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a linear motor having a divided magnetic pole tooth structure excellent in assembling workability.

  The armature of the linear motor according to the present invention includes a plurality of magnetic pole teeth sequentially arranged along the motor driving direction, and the magnetic pole teeth include a yoke portion that abuts adjacent magnetic pole teeth, and the motor from the yoke portion. The magnetic teeth are configured to protrude from both sides in a direction substantially perpendicular to the driving direction, and the magnetic pole teeth include a first magnetic pole teeth and a second magnetic pole disposed adjacent to the first magnetic pole teeth. The first magnetic teeth are provided with a pair of first divided teeth by being divided in a direction substantially perpendicular to the motor driving direction at the yoke portion, and the first divided teeth are the second teeth. The magnetic pole teeth are connected and fixed.

  According to the armature of the linear motor of the present invention, the first magnetic pole teeth are divided into a pair of first divided teeth, and the pair of first divided teeth are connected and fixed by the second magnetic pole teeth. Assembling workability of the divided magnetic pole teeth is good, and the reliability of the linear motor can be improved. Further, in the assembly of the divided magnetic pole teeth, they are firmly connected even if the bolts are not tightened. Furthermore, when fixing more firmly, it is not necessary to tighten bolts on all teeth, and the number of parts and the number of work steps can be reduced.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
1 shows a configuration of a linear motor according to Embodiment 1 of the present invention, FIG. 1 (a) is a side view, FIG. 1 (b) is a cross-sectional view taken along line XX of FIG. 1 (a), and FIG. Is a cross-sectional view showing each magnetic tooth constituting the armature of the linear motor in FIG. 1, FIG. 3 is a view showing a state in which a drive coil is wound around the first divided tooth in FIG. 2, and FIG. 4 is press-fitting the magnetic tooth. FIG. 5 is a detailed view showing a connecting portion of the magnetic teeth.

  As shown in FIG. 1B, the field portion 2 of the linear motor includes a plate-like yoke 21 extending in two rows along the motor driving direction (the direction of the double-headed arrow in the figure), and this yoke. 21 is composed of a plurality of permanent magnets 22 and 23 which are arranged at predetermined intervals along the motor driving direction and have different polarities alternately. The armature 3 of the linear motor is arranged with a predetermined interval between two rows of permanent magnets of the field magnet section 2 of the linear motor, and a plurality of magnetic pole teeth 31 sequentially arranged along the motor driving direction, The drive coil 4 is wound around the teeth 31. Further, the magnetic pole teeth 31 are located at the center between the two rows of permanent magnets 22 and 23, and the yoke portions 32 that contact the adjacent magnetic pole teeth 31 are formed on both sides of the yoke portions 32 facing the permanent magnets 22 and 23. It consists of the tooth | gear part 33 formed protrudingly.

  Further, the magnetic pole teeth 31 are composed of a first magnetic pole tooth 311, a second magnetic pole tooth 312 disposed adjacent to the first magnetic pole tooth 311, and third magnetic pole teeth 313 disposed at both ends. ing. The drive coil 4 is wound only around the tooth portion 33 of the first magnetic pole tooth 311, and the drive coil 4 is not wound around the second magnetic pole tooth 312 and the third magnetic pole tooth 313. In such a configuration, the first magnetic pole tooth 311 around which the drive coil 4 is wound serves as a main pole tooth, and the second magnetic pole tooth 312 around which the drive coil 4 is not wound suppresses cogging and torque ripple. It becomes a supplementary teeth for. The third magnetic pole teeth 313 serve as auxiliary teeth that reduce end cogging. Each magnetic pole tooth 31 is formed by connecting laminated steel plates together by caulking or the like after punching and laminating electromagnetic steel plates with a press.

  As shown in FIG. 2A, the first magnetic pole tooth 311 is divided into two at the yoke portion 32 to form a pair of first divided teeth 311A and 311B, and the first divided teeth 311A, respectively. 311B has press-fit convex piece portions 311a protruding from both end surfaces of the yoke portion 32. Further, the press-fitting convex piece portion 311a is provided with a notch 311c on the contact surface side when the first divided teeth 311A and 311B are contacted. On the other hand, as shown in FIG. 2 (b), the second magnetic pole tooth 312 has a press-fit recess 312 a formed by cutting out both end faces of the yoke portion 32. And the press-fit convex part 311b formed between press-fit convex piece parts 311a when the 1st magnetic pole teeth 311 are formed by sticking the back surface of the yoke part 32 of a pair of 1st division teeth 311A and 311B. In addition, the first divided teeth 311A and 311B are connected and fixed by press-fitting the press-fit recess 312a of the second magnetic pole tooth 312.

  2C, the third magnetic pole tooth 313 has a press-fit recess 313a formed by cutting out the end surface of the yoke portion 32 on the side in contact with the first magnetic pole tooth 311. . And the press-fit convex part 311b formed between press-fit convex piece parts 311a when the 1st magnetic pole teeth 311 are formed by sticking the back surface of the yoke part 32 of a pair of 1st division teeth 311A and 311B. In addition, the first divided teeth 311A and 311B are configured to be connected and fixed by press-fitting the press-fitting recesses 313a of the third magnetic pole teeth 313. Further, a hole 313 b is provided in the yoke portion 32 of the third magnetic pole tooth 313.

  Next, an assembly process will be described with reference to FIGS. In FIG. 3, one side (the yoke portion 32) of each of the first divided teeth 311 </ b> A and 311 </ b> B constituting the first magnetic pole teeth 311 is fixed to the core gripping portion 7 of the winding equipment, and the nozzles 8 respectively The drive coil 4 is wound around the tooth portion 33 of one divided tooth 311A, 311B. Thus, the winding can be wound with high density with simple equipment. Thereafter, as shown in FIG. 4A, the first magnetic pole teeth 311 are formed by bringing the back surfaces of the yoke portions 32 of the wound first divided teeth 311 </ b> A and 311 </ b> B into close contact with each other. Then, the press-fitting recesses 312a and 313a of the second magnetic pole tooth 312 and the third magnetic pole tooth 313 are press-fitted into the press-fitting convex part 311b formed by the press-fitting convex piece parts 311a of the first divided teeth 311A and 311B. At the time of press-fitting, as shown in FIG. 4, the press-fitting convex portions 311b on both sides of the first magnetic pole teeth 311 are press-fitted in a state regulated by the press-fitting concave portions 312a and 313a of the adjacent magnetic pole teeth. Improves. Similarly, as shown in FIGS. 4B to 4D, the magnetic pole teeth 311, 312, and 313 are sequentially press-fitted and fixedly connected.

  Here, as shown in FIG. 5, the width dimension of the press-fit convex portion 311b of the first magnetic pole tooth 311 is W1, and the width dimension of the press-fit concave portions 312a and 313a of the second magnetic pole tooth 312 and the third magnetic pole tooth 313 is shown. Where W1 <W2, the relationship is W1 ≧ W2 or W1> W2. At this time, by providing a notch 311c in the contact surface of the press-fitting convex piece 311a of the first divided teeth 311A and 311B, distortion and plastic deformation caused by press-fitting the press-fitting concave portions 312a and 313a into the press-fitting convex portion 311b. Can be relaxed, and stable press-fitting becomes possible. Further, since the close contact portion 311d is left outside the notch 311c, the press-fitting convex portion 311b has a rigid structure, and there is no backlash or the like in the press-fit portion, so that the armature 3 having a stable integrated structure is obtained. be able to.

  As shown in FIG. 1, the magnetic teeth 31 connected and fixed in this manner are arranged on the fixing member 5, and the holes 313 b provided in the third magnetic teeth 313 and the fixing member 5 are fastening members such as screws and pins. The armature 3 is manufactured by fastening and fixing at 6.

  The above manufacturing method is an example. For example, first, after fixing the third magnetic pole teeth 313 on one side to the fixing member 5 with the fastening member 6, the magnetic pole teeth 31 (311, 312, 313) are press-fitted on the fixing member 5 to be connected and fixed, The armature 1 can be manufactured by fixing the third magnetic pole tooth 313 on the other side to the fixing member 5 with the fastening member 6. In this case, the assembly man-hour is reduced and the productivity is improved.

  As described above, according to the present embodiment, the first magnetic pole teeth 311 are divided into the pair of first divided teeth 311A and 311B, so that winding of a complicated mechanism is not required and the winding is performed at a high density. Can be lined.

  In addition, the press-fitting recesses 312a and 313a of the second and third magnetic pole teeth 312 and 313 can be connected and fixed by press-fitting into the press-fitting convex part 311b of the first magnetic pole tooth 311 and play or the like is generated at the press-fitting portion. Therefore, the assembly workability is good, and the reliability can be improved because there is no breakage of the laminated sheet of the magnetic teeth and the damage due to the contact of the coil during the assembly.

  Furthermore, even if the magnetic pole teeth 31 (311 and 312) are not fastened by the fastening member 6, they can be firmly connected, and the number of parts and the number of work steps can be reduced.

  Note that the shape and number of the press-fitting convex portions 311b provided on the first magnetic pole teeth 311 and the press-fit concave portions 312a and 313a provided on the second and third magnetic pole teeth are not limited to the above description, and the number is two. For example, as shown in FIG. 6, the tip may have an arc shape.

  In the above description, the case where the drive coil 4 is wound around the first magnetic pole tooth 311 has been described. However, the drive coil 4 is wound around one of the first magnetic pole tooth 311 and the second magnetic pole tooth 312. The main electrode teeth may be configured, and one of the other may be configured as a complementary electrode tooth without winding the drive coil 4. In this case, since the drive coil 4 is provided only in one of the first magnetic pole teeth 311 and the second magnetic pole teeth 312, the magnetic teeth that are not wound can be separated in the stacking direction. As a result, the height at which the first magnetic pole teeth 311 and the second magnetic pole teeth 312 are press-fitted can be reduced, and the press-fitting operation can be easily performed. In addition, the number of winding and connection processes can be halved, and productivity can be improved. In addition, since the magnetic teeth wound around the drive coil 4 are not adjacent to each other, insulation between the coils is not necessary, and the insulation reliability can be improved. Further, in the case where the winding is applied only to the first magnetic teeth 311, as described above, the first divided teeth 311 </ b> A and 311 </ b> B may be provided with high winding density without requiring complicated windings. Can be wound.

Embodiment 2. FIG.
7 shows a configuration of a linear motor according to Embodiment 2 of the present invention, FIG. 7 (a) is a side view, FIG. 7 (b) is a cross-sectional view taken along line YY of FIG. 7 (a), and FIG. FIG. 8 is a cross-sectional view showing each magnetic tooth constituting the armature of the linear motor in FIG. 7. FIG. 9 is a detailed view of a magnetic tooth coupling portion. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 8A, the first magnetic pole teeth 311 constituting the armature 3 of the linear motor according to the second embodiment are divided at the yoke portion 32, and a pair of first divided teeth 311A. 311B. And each 1st division | segmentation teeth 311A and 311B have the engagement convex piece part 311e which protruded from the both end surfaces of the yoke part 32, respectively.

  On the other hand, in FIG. 8B, the second magnetic pole tooth 312 has a dovetail engaging recess 312 e formed by cutting out both end faces of the yoke portion 32. Then, by engaging the back surfaces of the yoke portions 32 of the pair of first divided teeth 311A and 311B, the engagement protrusions formed by the engagement protrusions 311e when the first magnetic pole teeth 311 are formed. The first divided teeth 311A and 311B are connected and fixed by press-fitting the engaging recess 312e of the second magnetic pole tooth 312 into the portion 311f.

  8C, the third magnetic pole tooth 313 has an engaging recess 313e formed by cutting out the end surface of the yoke portion 32 on the side in contact with the first magnetic pole tooth 311. . Then, by engaging the back surfaces of the yoke portions 32 of the pair of first divided teeth 311A and 311B, the engagement protrusions formed by the engagement protrusions 311e when the first magnetic pole teeth 311 are formed. The first divided teeth 311A and 311B are connected and fixed by press-fitting the engaging recess 313e of the third magnetic pole tooth 313 into the portion 311f. Further, a hole 313 b is provided in the yoke portion 32 of the third magnetic pole tooth 313.

  Further, the first divided teeth 311A and 311B are provided with a recess 311g that forms a hole 311h in a state where the back surfaces of the yoke portion 32 are in contact with each other. Further, a hole 312 f is provided in the yoke portion 32 of the second magnetic pole tooth 312.

  The assembly process is performed in the same manner as in the first embodiment. That is, after the drive coil 4 is wound around the first divided teeth 311A and 311B, the divided magnetic pole teeth 311A and 311B are connected and fixed by press-fitting, arranged on the fixing member 5, and the third magnetic pole teeth 313. The armature 1 is manufactured by fastening and fixing the hole 313b and the fixing member 5 provided by the fastening member 6.

  Moreover, in order to fix more firmly, in this Embodiment, the magnetic pole teeth 31 and the fixing member 5 are connected and fixed by filling the armature 1 with the mold 9. At this time, the mold 9 is filled in the hole 311h formed in the yoke portion 32 of the first magnetic pole tooth 311 by the recess 311g provided in the first divided teeth 311A, 311B.

  As shown in FIG. 9, the mold 9 is also filled in the hole 312f provided in the second magnetic pole tooth 312, and the mold 9 is also installed in the gap 311i formed between the engaging convex portion 311f and the engaging concave portion 312e. Can be filled.

  As described above, according to the present embodiment, the first magnetic pole teeth 311 are divided into the pair of first divided teeth 311A and 311B, so that winding of a complicated mechanism is not required and the winding is performed at a high density. Can be lined.

  Further, the engagement concave portions 312e and 313e of the second and third magnetic pole teeth 312 and 313 can be connected and fixed by press-fitting into the engagement convex portions 311f of the first magnetic pole teeth 311 and the assembly workability is good. The reliability can be improved because there is no cracking of the laminated sheet of magnetic teeth and damage due to coil contact even during assembly.

  Furthermore, even if the magnetic teeth 31 are not tightened by the fastening member, they can be firmly connected, and the number of parts and the number of work steps can be reduced.

  Further, since the armature 3 is filled with the mold 9, there is no backlash between the magnetic pole teeth, and the linear motor 1 having high rigidity can be manufactured. Further, by filling the hole 911h formed in the yoke portion 32 of the first magnetic pole tooth 311 with the mold 9, the first divided tooth is applied even if a force in the motor driving direction is applied to the first magnetic pole tooth 311. 311A and 311B do not deviate from each other, and a linear motor that does not affect characteristics such as cogging torque can be manufactured. Furthermore, since the hole 312f for filling the mold 9 is provided in the second magnetic pole tooth 312, the proof strength of the second magnetic pole tooth 312 in the motor driving direction can be increased.

  The numbers and shapes of the holes 311h and 312f provided in the yoke portion 32 of the first magnetic pole tooth 311 and the second magnetic pole tooth 312 are not limited to the above. Further, when fixing more firmly, the fastening member 5 can be passed through some of these holes 311h and 312f and fastened to the fixing member 6.

  Also in the first embodiment, it is possible to mold, and it is possible to provide a hole in the yoke portion 32 of the first magnetic pole tooth 311 and the second magnetic pole tooth 312, and a strong fixation is required. In other words, these holes can be used to tighten the fastening member or fill the mold.

Embodiment 3 FIG.
As shown in FIG. 10, in the first embodiment, when the second magnetic pole teeth 312 and the press-fit concave portions 312 a and 313 a of the third magnetic pole teeth 313 are press-fitted into the press-fit convex portions 311 b of the first magnetic pole teeth 311. The first divided teeth 311A and 311B may be inclined in the direction of arrow B or arrow C due to errors in the yoke part 32, the press-fitting convex part 311a, the press-fitting concave parts 312a and 313a, etc. There is sex.

  As shown in FIG. 11, the magnetic flux effective for generating the thrust of the linear motor 1 is the magnetic flux indicated by the arrow M for the second magnetic pole teeth 312 and the third magnetic pole teeth 313 in the first embodiment. (Magnetic flux crossing type). However, the magnetic flux passage is hindered by the gap between the connecting portions of the magnetic teeth, the gap formed by the notches 311c provided in the first divided teeth 311A and 311B, the hole 313b provided in the third magnetic teeth 313, etc. It may affect the motor characteristics.

  The present embodiment is for solving the problems described in FIGS. 10 and 11. FIG. 12 is a cross-sectional view showing the configuration of the armature of the linear motor according to the third embodiment of the present invention, and FIG. 12 is a cross-sectional view showing magnetic teeth constituting the armature of FIG. 12, FIG. 14 is a partial detailed view for explaining the connecting portion of FIG. 12, and FIG. 15 is a cross-sectional view for explaining the magnetic flux path of FIG.

  As shown in FIGS. 12-14, the recessed insertion part 311j is provided in the both ends of the yoke part 32 of the 1st division | segmentation teeth 311A and 311B, and the press-fit convex piece part 311a is provided in this recessed insertion part 311j. . Further, convex yoke connecting portions 312j and 313j are provided at the end portions of the yoke portions 32 of the second magnetic pole teeth 312 and the third magnetic pole teeth 313, and press-fitted into the convex yoke connecting portions 312j and 313j. Recesses 312a and 313a are provided. As shown in FIG. 14, the insertion portion 311j is in contact with the back surface of the yoke portion of the first divided teeth 311A, 311B, and the press-fitting convex portion 311b is formed. So that the yoke connecting portions 312j and 313j of the magnetic pole teeth 313 can be inserted, the width dimension W3 of the second magnetic pole teeth 312 or the yoke connecting portions 312j and 313j of the third magnetic pole teeth 313 is substantially the same as the width dimension W4. The fitting insertion portion 311k is provided so as to be formed.

  Moreover, in this Embodiment, the uneven | corrugated | grooved part 311l engaged with each other is provided in the back surface of the yoke part 32 which mutually contact | abuts the 1st division | segmentation teeth 311A and 311B. And this uneven | corrugated | grooved part 311l is provided so that a pair of 1st division | segmentation teeth 311A and 311B may become the same shape. Further, a hole 312 l is provided in the yoke portion 32 of the second magnetic pole tooth 312.

  Since it comprised in this way, the fitting connection part formed in the yoke connection part 312j, 313j of the 2nd magnetic teeth 312 or the 3rd magnetic teeth 313 by the insertion part 311j of the 1st division | segmentation teeth 311A and 311B During insertion into 311k, the first split teeth 311A and 311B do not tilt by the press-fitting of the press-fit convex portion 311b and the press-fit concave portions 312a and 313a (although a tilting force acts on the first magnetic pole tooth 311, The magnetic pole teeth 312 or the third magnetic pole teeth 313 are not inclined because they are regulated by the yoke connecting portions 312j and 313j), and can be easily assembled.

  Further, as shown in FIG. 15, since the yoke connecting portions 312j and 313j are provided in the yoke portion 32 of the second magnetic pole tooth 312 or the third magnetic pole tooth 313, a space margin can be provided in the yoke portion 32. The holes 312l and 313b provided in the yoke portion 32 of the second magnetic pole tooth 312 or the third magnetic pole tooth 313 can be enlarged, and fastening of a fastening member or mold filling can be performed using these holes 312l and 313b. Therefore, it can fix more firmly.

  Furthermore, even when the holes 312 l and 313 b are provided in the second magnetic pole teeth 312 or the third magnetic pole teeth 313 so as to prevent the magnetic flux effective for the thrust of the linear motor, the second magnetic pole teeth 312 or the third magnetic teeth 312 or 313 b are provided. The yoke connecting portions 312j and 313j provided on the magnetic pole teeth 313 function as a magnetic flux detour path (the path indicated by the arrow M1 in FIG. 15) and can prevent the characteristics of the linear motor from deteriorating.

  Further, since the concave and convex portions 311l that are engaged with each other are provided on the back surface of the yoke portion 32 that contacts the first divided teeth 311A and 311B, force in the motor driving direction is applied to the first magnetic pole teeth 311. Even so, the first divided teeth 311A and 311B are prevented from shifting. The number and shape of the uneven portions 311l are not limited to this. For example, a concave portion may be provided on the first divided tooth 311A on one side and a convex portion may be provided on the first divided tooth 311B on the other side. Good.

  In addition, as shown in FIG. 16, it is also possible to provide a hole 311m in the first magnetic pole tooth 311 and tighten the fastening member or perform mold filling. Moreover, although the figure which is not molded was used for the description above, it is natural that the third embodiment can be firmly fixed by the mold as in the second embodiment.

  In the third embodiment, the structure of the first embodiment has been described as an example. However, as shown in FIG. 17, the third embodiment is applied to the structure of the second embodiment to obtain a similar structure. Thus, the same effect can be obtained.

Embodiment 4 FIG.
In the armature 3 of the first to third embodiments, the first magnetic pole teeth 311 and the second magnetic pole teeth 312 are alternately arranged along the motor driving direction, and the third magnetic pole teeth 313 are provided at both ends. . Then, the drive coil 4 was wound only around the first magnetic pole tooth 311.

  18A and 18B show the configuration of a linear motor according to Embodiment 4 of the present invention. FIG. 18A is a side view, and FIG. 18B is a cross-sectional view taken along line ZZ in FIG. FIG. 19 is a diagram illustrating a process of winding the second magnetic pole teeth of FIG.

  As shown in FIG. 18, in the armature 3 according to the fourth embodiment, the first magnetic pole teeth 311 and the second magnetic pole teeth 312 are alternately arranged along the motor driving direction, and both magnetic pole teeth 311 and 312 are arranged. The drive coil 4 is wound around the coil. In this case, in order to reduce end cogging only at the teeth at both ends in the motor driving direction, notches are provided on the outer side of the tooth portion. In the method of manufacturing the armature 3, when the first magnetic pole tooth 311 is wound, the winding is applied to each of the pair of first divided teeth 311A and 311B as in the first embodiment. When winding the second magnetic pole tooth 312, as shown in FIG. 19A, after winding the tooth on one side, as shown in FIG. The magnetic teeth 312 are reversed and gripped, and the other tooth is wound. In the same manner as in the first embodiment, the magnetic teeth 311 and 312 in which the windings are wound in this manner are provided with the press-fitting concave portion 312a of the second magnetic pole tooth 312 on the press-fitting convex portion 311b of the first magnetic pole tooth 311. It is connected and fixed by press-fitting. Then, the armature 3 is manufactured by fastening the second magnetic pole teeth 312 to the fixing member 5 using some of the holes 3121 provided in the second magnetic pole teeth 312.

  With this configuration, the press-fit recess 312a of the second magnetic pole tooth 312 can be connected and fixed by press-fitting into the press-fit convex portion 311b of the first magnetic pole tooth 311. In addition, since there is no damage to the laminate of the magnetic teeth and contact with the coil, the reliability can be improved. Furthermore, it can connect firmly even if it does not clamp | tighten by the fastening member of each magnetic teeth, and can reduce a number of parts and an operation man-hour.

  In the first to third embodiments, when the three-phase drive coil 4 is provided, in addition to the three first magnetic pole teeth 311, the second magnetic pole teeth 312 and the third magnetic pole teeth 313 are provided. Two of each are required, and the total number of magnetic pole teeth in the minimum unit is 7 teeth. On the other hand, the minimum number of magnetic teeth in the fourth embodiment is 3 teeth as shown in FIG. 20, and variations in motor thrust and length in the motor driving direction can be increased.

  In the fourth embodiment, the structure of the first embodiment has been described as an example. However, the same effect can be obtained by applying the fourth embodiment to the structure of the second embodiment to obtain a similar structure. can get.

The structure of the linear motor by Embodiment 1 of this invention is shown, (a) is a side view, (b) is sectional drawing which follows the XX line of (a). It is sectional drawing which shows each magnetic pole tooth which comprises the armature of the linear motor by Embodiment 1 of this invention. It is a figure which shows a mode that a drive coil is wound around the 1st division | segmentation tooth | gear by Embodiment 1 of this invention. It is a figure which shows a mode that the magnetic pole teeth by Embodiment 1 of this invention are connected and fixed by press injection. It is detail drawing which shows the connection part of the magnetic teeth by Embodiment 1 of this invention. It is a fragmentary sectional view which shows the armature of the other linear motor by Embodiment 1 of this invention. The structure of the linear motor by Embodiment 2 of this invention is shown, (a) is a side view, (b) is sectional drawing which follows the YY line of (a). It is sectional drawing which shows each magnetic pole tooth which comprises the armature of the linear motor by Embodiment 2 of this invention. It is detail drawing which shows the connection part of the magnetic teeth by Embodiment 2 of this invention. It is a figure explaining the assembly property of the magnetic teeth of Embodiment 1 of this invention. It is a figure explaining the path | route of the magnetic flux effective in the thrust of Embodiment 1 of this invention. It is sectional drawing which shows the structure of the armature of the linear motor by Embodiment 3 of this invention. It is sectional drawing which shows the magnetic pole teeth which comprise the armature of the linear motor by Embodiment 3 of this invention. It is a partial detail drawing explaining the connection part of the magnetic pole tooth by Embodiment 3 of this invention. It is sectional drawing explaining the path | route of the magnetic flux of the armature of the linear motor by Embodiment 3 of this invention. It is a fragmentary sectional view which shows the structure of the armature of the other linear motor by Embodiment 3 of this invention. It is sectional drawing which shows the structure of the armature of the other linear motor by Embodiment 3 of this invention. The structure of the linear motor by Embodiment 4 of this invention is shown, (a) is a side view, (b) is sectional drawing which follows the ZZ line of (a). It is a figure explaining the process wound around the 2nd magnetic pole tooth of Embodiment 4 of this invention. It is sectional drawing which shows the structure of the armature of the other linear motor by Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Linear motor, 2 Field part, 21 Yoke, 22, 23 Permanent magnet, 3 Armature, 31 Magnetic pole teeth, 4 Drive coil, 5 Fixing member, 6 Fastening member, 32 yoke part,
33 teeth, 311 first magnetic pole teeth, 312 second magnetic pole teeth,
311A, 311B first divided teeth, 311a press-fitting convex piece,
311b Press-fit convex portion, 312a Press-fit concave portion, 9 mold, 311e engaging convex piece portion,
311f engaging convex part, 312e engaging concave part,
311h, 311m, 312f, 312l hole, 311l uneven part, 311j insertion part, 312j yoke connection part.

Claims (11)

An armature of a linear motor having a plurality of magnetic pole teeth sequentially arranged along a motor driving direction,
The magnetic pole teeth are composed of a yoke portion that comes into contact with the adjacent magnetic pole teeth, and tooth portions that are formed to project from the yoke portion to both sides in a direction substantially perpendicular to the motor driving direction,
The magnetic pole teeth include a first magnetic pole tooth and a second magnetic pole tooth disposed adjacent to the first magnetic pole tooth,
The first magnetic pole teeth are divided at the yoke portion in a direction substantially perpendicular to the motor drive direction, thereby forming a pair of first divided teeth, and the first divided teeth are the second divided teeth. A linear motor armature, wherein the armature is connected and fixed by magnetic pole teeth. The first divided tooth has a press-fit convex piece portion that is formed on the yoke portion and protrudes from both end surfaces in the motor driving direction, and the second magnetic pole tooth is located on the yoke portion. And having press-fitting recesses formed by cutting out both end surfaces in the motor driving direction, and forming the press-fitting convex pieces by bringing the yoke backs of the pair of first divided teeth into contact with each other. 2. The armature for a linear motor according to claim 1, wherein the first divided teeth are connected and fixed by press-fitting a press-fitting concave portion of the second magnetic pole tooth into the press-fitting convex portion. The first divided teeth have engaging convex pieces formed on the yoke portion and projecting from both end surfaces in the motor driving direction, and the second magnetic pole teeth are formed on the yoke portion. A dovetail-shaped engaging recess formed by cutting out both end surfaces in the motor driving direction and contacting the back surfaces of the yoke portions of the pair of first divided teeth. 2. The first divided teeth are connected and fixed by press-fitting an engaging concave portion of the second magnetic pole teeth into an engaging convex portion formed by the mating convex piece portions. The armature of the linear motor described in 1. The second magnetic pole teeth have a yoke connecting portion formed at the yoke portion and projecting from both end faces in the motor driving direction, and the first magnetic pole teeth are located at the yoke portion. An insertion portion formed by cutting out both end faces in the motor driving direction, and the yoke connection portion of the second magnetic teeth is inserted into the insertion portion of the first magnetic teeth,
The press-fit recess or the engagement recess is formed in the yoke connecting portion of the second magnetic pole tooth, and the press-fit protrusion or the engagement convex portion is formed in the insertion portion of the first magnetic pole tooth. The armature of the linear motor according to claim 2, wherein the armature is a linear motor armature. The uneven | corrugated | grooved part which mutually engages is provided in the yoke part contact surface which mutually contact | abuts of the said 1st division | segmentation teeth, The any one of Claims 1-4 characterized by the above-mentioned. Armature of the described linear motor. The drive coil is wound around one of the first magnetic pole tooth and the second magnetic pole tooth to form the main pole tooth, and the drive coil is not wound around the other to form the complementary pole tooth. The armature for a linear motor according to any one of claims 1 to 5, wherein the armature is a linear motor. The linear motor armature according to any one of claims 1 to 5, wherein a drive coil is wound around the first magnetic pole teeth and the second magnetic pole teeth. The armature for a linear motor according to any one of claims 1 to 7, wherein a hole is provided in a yoke portion of the magnetic pole teeth. The linear motor according to claim 8, wherein the magnetic pole teeth are fastened and fixed to the fixing member through the fastening member in the hole. The linear motor armature according to any one of claims 1 to 9, wherein the magnetic pole teeth are fixed by molding. A field portion provided with a plurality of permanent magnets arranged at a predetermined interval opposite to each other in two rows along the motor driving direction, and a predetermined interval between the permanent magnets of the field portion. The linear motor provided with the armature of the linear motor of any one of Claims 1-11 arrange | positioned.

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