JP2016226185A - Linear motor and method for manufacturing linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve reliability of a linear motor.SOLUTION: There is provided a linear motor 1 having a magnetic field section 2 and an armature section 3, where the linear motor has an armature core 10 having a plurality of teeth 11, a plurality of bobbins 20 mounted on each of the plurality of teeth 11, a plurality of coils 13 wound around each of the plurality of bobbins 20, at least one lead wire 14 electrically connected to the coils 13, a holding member 30 which is fixed onto the bobbin 20 and holds the lead wire 14, and a resin portion 16 covering the lead wire 14.SELECTED DRAWING: Figure 1

Description

  The embodiment of the disclosure relates to a linear motor and a method for manufacturing the linear motor.

  In Patent Document 1, a lead wire for connecting to a power source is provided on the winding start side of each phase of the armature coils of U, V, and W, and the winding end side of each phase of the armature coil is connected by a neutral point. A linear motor is described.

JP 2000-308328 A

  The linear motor preferably has a structure in which the lead wire is fixed so that the lead wire does not move when the armature is molded with resin. However, in the above-described prior art, the structure for fixing the lead wire is not particularly considered, and further optimization of the device configuration is desired in order to improve the reliability.

  The present invention has been made in view of such problems, and an object thereof is to provide a linear motor and a method of manufacturing the linear motor that can improve reliability.

  In order to solve the above problems, according to one aspect of the present invention, a linear motor including a field portion and an armature portion, an armature core including a plurality of teeth, and a plurality of teeth A plurality of bobbins attached thereto, a plurality of coils wound around each of the plurality of bobbins, at least one lead wire electrically connected to the coils, and fixed to the bobbin, A linear motor having a holding member that holds a lead wire and a resin portion that covers at least a part of the bobbin, the coil, the lead wire, and the holding member is applied.

  According to another aspect of the present invention, the linear motor includes a field portion and an armature portion, and is mounted on each of the armature core including a plurality of teeth and the plurality of teeth. A plurality of bobbins, a plurality of coils wound around each of the plurality of bobbins, and inserted into each of the armature core and the plurality of bobbins to prevent positional deviation of the bobbins attached to the teeth. A linear motor having a plurality of positioning members and a resin portion covering at least a part of the bobbins, the coils, and the positioning members is applied.

  According to still another aspect of the present invention, there is provided a method for manufacturing a linear motor including a field portion and an armature portion, wherein a bobbin is formed by winding a coil around each of a plurality of teeth of an armature core. Attaching at least one lead wire electrically connected to the coil, attaching a holding member for holding the lead wire to the bobbin, and attaching the lead wire with resin. And a linear motor manufacturing method is applied.

  According to the present invention, the reliability of a linear motor can be improved.

It is a front view showing an example of the whole linear motor composition concerning an embodiment. It is a top view of the armature part of a linear motor. It is a bottom view of the armature part of a linear motor. It is sectional drawing by the AA cross section of FIG. It is sectional drawing by the BB cross section of FIG. It is the top view showing an example of the structure of a bobbin, a front view, and a right view. It is a perspective view showing an example of the structure of a bobbin. It is a perspective view showing an example of the structure of a holding member. It is explanatory drawing showing an example of the mounting state to the bobbin of a holding member. 6 is a top view of a linear motor of Comparative Example 1. FIG. 6 is a bottom view of an armature portion of a linear motor of Comparative Example 2. FIG. FIG. 6 is a cross-sectional view corresponding to FIG. 5 in a modification in which the pin does not penetrate the yoke portion. It is sectional drawing equivalent to FIG. 5 in the modification which makes the standing part of a collar part one.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, when “upper”, “lower”, “front”, “rear”, “right”, “left” are referred to for the linear motor 1, the directions of the arrows appropriately shown in each figure such as FIG. However, the positional relationship of each component such as the linear motor 1 is not limited.

<1. Overall configuration of linear motor>
An example of the overall configuration of the linear motor 1 according to this embodiment will be described with reference to FIGS. 1 to 5. 1 is a front view illustrating an example of the overall configuration of the linear motor 1, FIG. 2 is a top view of the armature portion 3, FIG. 3 is a bottom view of the armature portion 3, and FIG. 4 is a cross-sectional view taken along the line AA in FIG. FIG. 5 and FIG. 5 are cross-sectional views taken along the line BB of FIG.

  As shown in FIG. 1, the linear motor 1 has a field part 2 and an armature part 3. The linear motor 1 is configured such that one of the field part 2 and the armature part 3 is a stator and the other is a mover, and the stator and the mover are relatively movable in the stroke direction (left and right direction in FIG. 1). ing. The field portion 2 has, for example, a substantially rectangular parallelepiped field yoke 4 extending in the stroke direction, and a plurality of field magnets 5 arranged on the field yoke 4 so that the polarities are alternately different in the stroke direction. .

  As shown in FIGS. 1 and 2, the armature portion 3 includes an armature core 10, a plurality of bobbins 20, a plurality of coils 13, at least one lead wire 14, a holding member 30, and a resin portion. 16.

  The armature core 10 includes a plurality (six in this example) of teeth 11 and has a yoke portion 12 that connects the plurality of teeth 11 at the upper end portion on the side opposite to the field portion 2. The yoke portion 12 is formed, for example, in a substantially rectangular plate shape extending in the stroke direction, and each tooth 11 projects downward from the yoke portion 12 (field portion 2 side). The plurality of teeth 11 are arranged at substantially equal intervals in the stroke direction of the yoke part 12, and the lower end part on the field part 2 side is arranged to face the field magnet 5 with a magnetic gap therebetween. In the example shown in FIG. 1, the linear motor 1 is configured in a slot combination of, for example, 5 poles and 6 slots in which 6 teeth 11 (6 slots) are arranged for 5 field magnets 5. Other slot combinations may be used.

  The bobbin 20 is attached to each of the plurality of teeth 11. As shown in FIG. 4, each bobbin 20 has a winding portion 21 in which the teeth 11 are inserted inside and the coil 13 is wound outside, and an upper end side (corresponding to an example of one end side) of the winding portion 21. And a base portion 18 provided on the lower end side of the winding portion 21. As shown in FIGS. 3 and 4, the bobbin 20 is provided with a substantially rectangular through hole 24 that penetrates the collar portion 22, the winding portion 21, and the base portion 18 in the vertical direction (viewed from the vertical direction). It has been. The bobbin 20 is attached to the tooth 11 by inserting the tooth 11 into the through hole 24. In the bobbin 20 attached to the tooth 11, the collar portion 22 abuts on the yoke portion 12, and the tooth 11 is slightly exposed to the lower side from the base portion 18. The resin portion 16 for molding the armature portion 3 covers the base portion 18 so as to surround the periphery of the exposed portion of the tooth 11.

  The collar portion 22 includes a pair of standing portions 25 that are vertically arranged with respect to the collar portion 22 at two positions on both sides of the front and rear sides of the yoke portion 12 on the upper surface opposite to the winding portion 21. Yes. As shown in FIGS. 2 and 5, a pin 17 (corresponding to an example of a positioning member) is inserted into the two front and rear standing portions 25 and the yoke portion 12. The front standing portion 25 supports the front end portion of the pin 17 penetrating the yoke portion 12, and the rear standing portion 25 supports the rear end portion of the pin 17 penetrating the yoke portion 12. Also, as shown in FIGS. 2 and 4, a holding member 30 is attached between the front-side standing portion 25 and the flange portion 22. A lead wire 14 is inserted into a space 19 surrounded by the holding member 30, the collar portion 22, and the standing portion 25. For example, when the resin portion 16 is molded by a mold (not shown), the lead wire 14 is inserted into the space 19. The lead wire 14 is held so as not to jump out of the space 19.

  The coil 13 is wound around each of the winding portions 21 of the plurality of bobbins 20. The linear motor 1 has a plurality of sets (two sets in this example) of one set of coils 13 corresponding to the U-phase, V-phase, and W-phase, for example. The lead wire 14 is wired from the motor cable 50 into the resin portion 16 and is electrically connected to the coil 13. The number of lead wires 14 is not particularly limited. For example, a total of four lead wires corresponding to the U-phase, V-phase, and W-phase, and one lead wire corresponding to the frame ground. Is wired. In FIG. 1, FIG. 2, FIG. 4, etc., only three of them are shown.

  The holding member 30 is fixed to the bobbin 20 and holds the lead wire 14 as described above. The number of holding members 30 is not particularly limited, but one holding member 30 is provided for each bobbin 20 in the present embodiment. The resin portion 16 covers at least the lead wire 14 held by the holding member 30. In the present embodiment, the resin portion 16 covers the bobbin 20, the coil 13, and the holding member 30 in addition to the lead wire 14, and also covers a part of the armature core 10. In this example, in the armature core 10, the lower end portion of each tooth 11 and the upper portion of the yoke portion 12 are exposed from the resin portion 16. In FIG. 1 to FIG. 5, the resin part 16 is illustrated by an imaginary line for convenience of explanation.

<2. Detailed structure of bobbin>
An example of the detailed structure of the bobbin 20 will be described with reference to FIGS. 6 and 7. 6A is a top view of the bobbin 20, FIG. 6B is a front view of the bobbin 20, FIG. 6C is a right side view of the bobbin 20, and FIG. 7 is a perspective view of the bobbin 20.

  As shown in FIGS. 6C and 7, the bobbin 20 includes a cylindrical winding part 21 around which the coil 13 is wound, and a collar part 22 provided on the upper end side of the winding part 21. And the base portion 18 provided on the lower end side of the winding portion 21. Further, as shown in FIGS. 6A and 7, the through hole 24 penetrating the collar portion 22, the winding portion 21, and the base portion 18 of the bobbin 20 in the vertical direction substantially corresponds to the outline of the tooth 11. It is formed in a rectangular shape. On the inner peripheral surface of the through hole 24, as shown in FIG. 6A, a rectangular projecting piece 24a is provided on the front side as a friction portion for making it difficult for the bobbin 20 attached to the tooth 11 to come off. An uneven portion 24b having an appropriate shape (substantially triangular or the like) is provided on the rear side (illustration of the friction portion is omitted in FIG. 7).

  At the front end portion of the collar portion 22, slit-shaped notches 22 a are provided at two locations in the width direction (left-right direction) orthogonal to the longitudinal direction (front-rear direction) of the collar portion 22. The winding start end portion and the winding end end portion of the coil 13 wound around the winding portion 21 are led out to the upper surface side of the collar portion 22 through the two cutout portions 22a, and are connected to the lead wire 14 and the like. Is given. A first cutout hole 26 for mounting the holding member 30 is provided between the two cutout portions 22a of the collar portion 22 and in the vicinity of the right cutout portion 22a in this example. The first cutout hole 26 is formed in a shape in which, for example, a tapered cutout portion 26 b opened at the front end portion of the collar portion 22 communicates with a round hole 26 a penetrating the collar portion 22.

  On the other hand, on the top surface of the collar portion 22, a pair of the above-described standing portions 25 are provided so as to stand vertically with respect to the collar portion 22 at two locations on both sides of the yoke portion 12. For example, mounting holes 27 into which the pins 17 are inserted are provided at positions on the left side of the two standing portions 25, for example. The pin 17 is inserted into the through hole (not shown) of the yoke portion 12 from the mounting hole 27 of the one standing portion 25 and further inserted into the mounting hole 27 of the other standing portion 25, so that the yoke portion 12 and the front and rear Both ends of the pin 17 penetrating through the standing portion 25 are supported by the front and rear standing portions 25. Further, a second notch hole 28 for mounting the holding member 30 is provided at a position corresponding to the first notch hole 26 in the standing portion 25 on the front side of the collar portion 22. The second cutout hole 28 is formed, for example, in a shape in which a tapered cutout portion 28 b opened at the upper end portion of the standing portion 25 communicates with a round hole 28 a penetrating the standing portion 25.

<3. Detailed structure of holding member>
An example of the detailed structure of the holding member 30 will be described with reference to FIG. As shown in FIG. 8, the holding member 30 includes a plate member 31 that is bent into a substantially L shape having a surface portion 31a and a surface portion 31b. A substantially T-shaped first protrusion 32 protruding in parallel with the surface portion 31a is formed at a substantially central position in the left-right direction on the lower end side of the plate member 31 (corresponding to an example of one end side of the holding member 30). A substantially T-shaped second protrusion 33 projecting in parallel with the surface portion 31b is formed at a substantially central position in the left-right direction on the rear end side of 31 (corresponding to an example of the other end side of the holding member 30). The first protrusion 32 (an example of a protrusion) includes a substantially cylindrical shaft portion 32a connected to the lower end side of the plate member 31, and a plate-like engagement portion 32b provided at the lower end of the shaft portion 32a. Have. The second projecting portion 33 (an example of the projecting portion) includes a substantially cylindrical shaft portion 33a connected to the rear end side of the plate member 31, and a plate-like engagement portion 33b provided at the rear end of the shaft portion 33a. And have.

  As shown in FIG. 9, in the holding member 30, the shaft portion 32 a of the first protrusion portion 32 is inserted into the first notch hole 26 of the collar portion 22 from the front side, and the shaft portion 33 a of the second protrusion portion 33 is inserted. By being inserted into the second cutout hole 28 of the standing portion 25 from the upper side, it is detachably attached between the collar portion 22 and the standing portion 25. At this time, the engaging portion 32b of the first protruding portion 32 contacts the lower surface of the collar portion 22, and the engaging portion 33b of the second protruding portion 33 contacts the rear surface of the standing portion 25. The protrusions 32 and 33 are prevented from coming off from the cutout holes 26 and 28. When the holding member 30 is attached to the bobbin 20, a space 19 that is surrounded by the holding member 30, the collar portion 22, and the standing portion 25 and through which the lead wire 14 is inserted is formed.

<4. Manufacturing method>
An example of a method for manufacturing the linear motor 1 will be described. First, the bobbin 20 around which the coil 13 is wound is attached to each of the plurality of teeth 11 of the armature core 10. Next, a plurality of lead wires 14 drawn out from the motor cable 50 are respectively wired in the space on the upper side of the flange portion 22 of the bobbin 20 and on the front side of the front standing portion 25, and connected to each end of the coil 13. And electrically connected. Next, a plurality of holding members 30 that hold the lead wires 14 are respectively attached to the bobbins 20. And the resin part 16 which coat | covers the lead wire 14, the bobbin 20, the coil 13, the holding member 30, the armature core 10, etc. is formed by insert molding etc., for example. The linear motor 1 is manufactured by arranging the armature part 3 formed in this manner so as to be opposed to the field part 2 via a predetermined magnetic gap so as to be relatively movable.

<5. Comparative Example>
Next, in order to facilitate understanding of the effects of the present embodiment, Comparative Example 1 and Comparative Example 2 will be described with reference to FIGS. 10 and 11.

(5-1. Comparative Example 1)
In the linear motor, if the lead wire 14 moves when forming the resin portion 16, a part of the lead wire 14 may protrude from the resin portion 16. Therefore, the lead wire 14 may be fixed. preferable. The comparative example 1 is an example of a structure that fixes the lead wire 14 using, for example, a tie string. FIG. 10 is a top view of the linear motor 1A of the first comparative example.

  As shown in FIG. 10, in the linear motor 1 </ b> A, the fixing process of the lead wire 14 is performed by the binding string 40. In this example, the strap 40 binds the lead wires 14 led to the front portion of the bobbin 20 at two locations on the front side of each bobbin 20. Thereby, the lead wire 14 can be fixed. However, since the fixing work of the lead wire 14 by the tie strap 40 is generally a manual work, there is a possibility that the fixing reliability may be lowered, and the work often requires a great deal of labor and time. .

(5-2. Comparative Example 2)
In the linear motor, if the bobbin 20 attached to the teeth 11 is displaced when the resin part 16 is formed, the surface of the bobbin 20 on the field part 2 side may be exposed from the resin part 16. Therefore, it is preferable that the bobbin 20 be positioned. The comparative example 2 is an example of a structure in which positioning is performed by pressing a die used at the time of molding the resin portion 16 against the bobbin 20, for example. FIG. 11 is a bottom view of the linear motor 1B of the second comparative example.

  As shown in FIG. 11, in the linear motor 1 </ b> B, a plurality of protrusions 42 are provided on the lower surface of the base portion 18 of the bobbin 20 (surface on the field magnet portion 2 side of the bobbin 20) so as to surround the teeth 11. Yes. When the resin portion 16 is molded, the bobbin 20 is positioned so that the collar portion 22 is in contact with the yoke portion 12 by pressing the protrusion 42 against an upper mold (not shown). Thus, the resin portion 16 is molded.

  If it does in this way, it can prevent that the bobbin 20 with which the tooth | gear 11 was mounted | worn is misaligned at the time of shaping | molding of the resin part 16, and exposure from the resin part 16 of the surface by the side of the magnetic field part 2 of the bobbin 20 is prevented. can do. However, since the front end surface of each protrusion 42 that hits the upper mold is exposed from the resin portion 16, the resin portion 16 is likely to peel off from that point, which may cause generation of particles. Moreover, since the front end surface of each protrusion 42 appears in the external appearance of a linear motor, there also exists a subject that external appearance property falls.

<6. Effects of the embodiment>
As described above, the linear motor 1 according to the present embodiment includes the field portion 2 and the armature portion 3, and is mounted on each of the armature core 10 including the plurality of teeth 11 and the plurality of teeth 11. A plurality of bobbins 20, a plurality of coils 13 wound around each of the plurality of bobbins 20, at least one lead wire 14 electrically connected to the coil 13, and a lead wire fixed to the bobbin 20. A plurality of holding members 30 that hold the lead wire 14, and a resin portion 16 that covers the lead wire 14. Thereby, there exists the following effect.

  That is, as described above, the linear motor preferably has a structure in which the lead wire 14 is fixed so that the lead wire 14 does not move when the resin portion 16 is formed. Here, for example, when the lead wire 14 is fixed using a wiring board, there is a problem that the cost increases. In addition, as shown in the first comparative example without using the wiring board, for example, when fixing the lead wire 14 using the strap 40, the fixing reliability is lowered because it is a manual operation. There is a problem that a lot of labor and time are required for the work.

  On the other hand, in this embodiment, since the holding member 30 that holds the lead wire 14 is fixed to the bobbin 20, the lead wire 14 is held so as not to protrude from the resin portion 16 when the resin portion 16 is formed. The reliability of the linear motor 1 can be improved. Further, since no substrate is used, the cost can be reduced, and since no tie straps are used, fixing reliability and workability can be greatly improved.

  In the present embodiment, in particular, the holding members 30 are provided in the same number as the plurality of bobbins 20, and each holding member 30 is fixed to each of the plurality of bobbins 20. Thereby, compared with the case where the holding member 30 is provided integrally between the plurality of bobbins 20, for example, a larger gap can be formed so that the resin flows into the holding member 30 during resin molding and can be smoothly introduced. Therefore, generation | occurrence | production of the molding defect etc. of the resin part 16 can be reduced.

  In the present embodiment, in particular, the holding member 30 has protrusions 32 and 33 that are attached to and detached from the bobbin 20. Thereby, the holding member 30 can be configured to be detachable from the bobbin 20. As a result, when connecting or wiring the lead wire 14, the holding member 30 is removed from the bobbin 20, and the lead wire 14 can be held only by attaching the holding member 30 to the bobbin 20 thereafter. Can be further improved.

  In the present embodiment, in particular, the holding member 30 is a bent plate member 31, and the lead wire 14 is inserted into a space 19 surrounded by the holding member 30 and the bobbin 20. Thereby, there exists the following effect.

  That is, it is possible to improve the certainty of holding the lead wire 14 by surrounding the lead wire 14 with the holding member 30 and the bobbin 20 which are bent plate members. In addition, for example, when there are a plurality of lead wires 14, the structure of the holding member 30 can be simplified compared to the case where the holding member 30 is structured to hold each lead wire 14 individually, and The workability of fixing the lead wire 14 can be improved.

  In the present embodiment, in particular, the armature core 10 has a yoke portion 12 that connects a plurality of teeth 11, and the bobbin 20 is wound with the teeth 11 inserted inside and the coils 13 wound around the outside. The lead wire 14 includes a turning portion 21, a flange portion 22 formed on the upper end side of the winding portion 21 and abutting against the yoke portion 12, and a standing portion 25 standing on the upper surface of the flange portion 22. Is inserted into the space 19 surrounded by the holding member 30, the collar portion 22, and the standing portion 25. Thereby, there exists the following effect.

  That is, in general, in the bobbin 20, the space on both sides of the yoke portion 12 on the upper surface side of the collar portion 22 may be a dead space (a space filled only with resin) in which no parts are installed. In the present embodiment, by providing the standing portion 25 on the upper surface of the collar portion 22, the structure for holding the lead wire 14 with the holding member 30 can be arranged in the space, and the space can be effectively utilized. . As a result, the linear motor 1 can be reduced in size.

  Further, in particular, in the present embodiment, the holding member 30 is formed on the lower end side of the holding member 30 and is held by the first protrusion 32 that is engaged with the first notch hole 26 formed in the collar portion 22. And a second protrusion 33 that is formed on the rear end side of the member 30 and is engaged with the second notch hole 28 formed in the standing portion 25.

  That is, in the holding member 30, the first protrusion 32 and the second protrusion 33 formed at both ends are engaged with the flange portion 22 and the standing portion 25 of the bobbin 20. Thereby, since both ends of the holding member 30 can be fixed to the bobbin 20, the wobbling of the holding member 30 during molding can be prevented, and the reliability of holding the lead wire 14 can be improved.

  Further, in the present embodiment, in particular, the armature core 10 and the bobbin 20 are each provided with a pin 17 that is inserted into each of the armature core 10 and the bobbin 20 and prevents the bobbin 20 attached to the tooth 11 from being displaced. Thereby, there exists the following effect.

  That is, as described above, the linear motor 1 preferably has a structure in which the bobbin 20 is positioned so that the bobbin 20 attached to the tooth 11 does not shift when the resin portion 16 is formed. Here, as shown in the comparative example 2, for example, when the plurality of protrusions 42 are provided on the lower surface of the base portion 18 of the bobbin 20, there is a problem that the generation of particles and the appearance are deteriorated as described above.

  In the present embodiment, since the positioning member for preventing the displacement of the bobbin 20 is provided, the protrusion 42 of the bobbin 20 is not necessary. Thereby, generation | occurrence | production of the said particle can be suppressed and the external appearance property of the linear motor 1 can also be improved.

  In this embodiment, in particular, the pin 17 inserted into the yoke portion 12 and the standing portion 25 is used as a positioning member. Thereby, since the extending direction of the pin 17 becomes a direction substantially orthogonal to the positional deviation direction of the bobbin 20 (extending direction of the teeth 11), the certainty of preventing the positional deviation of the bobbin 20 can be improved. Further, since the standing portion 25 can be used for both the holding of the lead wire 14 and the positioning of the bobbin 20, the structure can be simplified, the number of parts can be reduced, and the cost can be reduced.

  Further, in particular, in the present embodiment, the standing portions 25 are erected at two positions on the upper surface of the collar portion 22 with the yoke portion 12 interposed therebetween, and the pin 17 includes the yoke portion 12 and the two front and rear standing portions. It is provided through the installation part 25.

  As a result, the bobbin 20 can be positioned at two locations with the yoke portion 12 interposed therebetween, so that the tilt of the bobbin 20 can be prevented and the positioning can be stabilized. Further, when the armature core 10 has a laminated structure made of electromagnetic steel plates or the like, it is necessary to ground the conductive member in the lamination direction. However, in this embodiment, the pin 17 can also be used as the conductive member. Simplification, reduction in the number of parts, cost reduction, and the like can be achieved.

  In the linear motor 1, the bobbin 20 around which the coil 13 is wound is attached to each of the plurality of teeth 11 of the armature core 10, and at least one lead wire 14 electrically connected to the coil 13. , Wiring the holding member 30 holding the lead wire 14 to the bobbin 20, and covering the lead wire 14 with resin. Thereby, since the lead wire 14 can be held only by an easy operation of attaching the holding member 30 to the bobbin 20, the workability of fixing the lead wire 14 can be greatly improved.

<7. Modification>
The disclosed embodiments are not limited to the above, and various modifications can be made without departing from the spirit and technical idea thereof. Hereinafter, such modifications will be described.

(7-1. When the pin does not penetrate the yoke part)
In the above-described embodiment, the pin 17 for positioning the bobbin 20 is configured to penetrate the yoke portion 12. However, the pin 17 may be configured not to penetrate the yoke portion 12. An example of this modification is shown in FIG. In FIG. 12, the same members as those in FIG.

  As shown in FIG. 12, the linear motor 1 of this modification includes two pins 17 that are shorter than those of the above embodiment. One pin 17 is inserted halfway between the one standing portion 25 and the yoke portion 12, and the other pin 17 is inserted halfway between the other standing portion 25 and the yoke portion 12. The two pins 17 are configured so as not to penetrate the yoke portion 12.

  Also according to this modification, it is possible to prevent the displacement of the bobbin 20 when the resin portion 16 is formed.

(7-2. When there is one standing part)
In the above embodiment, the pair of standing portions 25 are provided at two positions on the upper surface of the flange portion 22 in the front and rear sides with the yoke portion 12 interposed therebetween, but the number of the standing portions 25 is limited to two. It may be one instead of one. In this case, the installation position of the standing part 25 may be either the front side or the rear side of the yoke part 12, but the holding member 30 can be installed by setting it to the front side. An example of this modification is shown in FIG. In FIG. 13, members similar to those in FIG.

  As shown in FIG. 13, in the linear motor 1 of the present modification, the upright portion 25 is on the front side where the holding member 30 is installed in the two front and rear portions sandwiching the yoke portion 12 on the upper surface of the collar portion 22. Only installed, not on the back side. The pin 17 is inserted into the standing portion 25 and the yoke portion 12. In the example shown in FIG. 13, the pin 17 is inserted up to the rear end portion of the yoke portion 12, but it may be configured to be inserted halfway through the yoke portion 12 as shown in FIG. 12.

(7-3. Number of holding members)
In the above embodiment, the number of holding members 30 is the same as that of the bobbin 20, and one holding member 30 is installed for each bobbin 20. However, the number of holding members 30 is not limited to this. For example, one holding member 30 may be installed for every two bobbins 20, and one holding member 30 may be installed for every three bobbins 20. In this case, the holding member 30 may be formed relatively long so as to cover the two or three bobbins 20. Further, one holding member 30 that covers the entire bobbin 20 may be provided.

(7-4. When the protrusion of the holding member is only one side)
In the above embodiment, the holding member 30 includes the protrusions 32 and 33 on both the one end side and the other end side of the plate member 31, respectively. However, the configuration of the holding member 30 is not limited thereto. For example, the holding member 30 may have a protruding portion on only one of the one end side and the other end side, and may be engaged only with the one protrusion.

  In the above description, when there is a description such as “vertical” or “parallel”, the description is not strict. That is, the terms “vertical” and “parallel” mean that “tolerance and error in manufacturing are allowed in design,” and “substantially vertical” and “substantially parallel”.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination.

  In addition, although not illustrated one by one, the above-mentioned embodiment and each modification are implemented with various modifications within a range not departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1 Linear motor 2 Field part 3 Armature part 10 Armature core 11 Teeth 12 Yoke part 13 Coil 14 Lead wire 16 Resin part 17 Pin (an example of a positioning member)
DESCRIPTION OF SYMBOLS 19 Space 20 Bobbin 21 Winding part 22 Collar part 25 Standing part 26 1st notch hole 28 2nd notch hole 30 Holding member 31 Plate member 32 1st protrusion part (an example of protrusion part)
33 Second protrusion (an example of a protrusion)

Claims (11)

A linear motor having a field part and an armature part,
An armature core having a plurality of teeth;
A plurality of bobbins attached to each of the plurality of teeth;
A plurality of coils wound around each of the plurality of bobbins;
At least one lead wire electrically connected to the coil;
A holding member fixed to the bobbin and holding the lead wire;
A resin portion covering the lead wire;
The linear motor characterized by having. The holding member is
The linear motor according to claim 1, wherein the linear motor is provided in the same number as the plurality of bobbins, and each holding member is fixed to each of the plurality of bobbins. The holding member is
The linear motor according to claim 1, further comprising at least one protrusion that is attached to and detached from the bobbin. The holding member is
A bent plate member,
The lead wire is
The linear motor according to claim 3, wherein the linear motor is inserted into a space surrounded by the holding member and the bobbin. The armature core is
A yoke portion connecting the plurality of teeth;
The bobbin is
A winding part in which the teeth are inserted inside and the coil is wound outside;
A collar portion formed on one end side of the winding portion and in contact with the yoke portion;
A standing portion that is erected on a surface opposite to the winding portion of the collar portion,
The lead wire is
The linear motor according to claim 4, wherein the linear motor is inserted into the space surrounded by the holding member, the flange portion, and the standing portion. The at least one protrusion is
A first protrusion formed on one end of the holding member and engaged with a first notch formed in the collar;
The linear motor according to claim 5, further comprising: a second protrusion formed on the other end side of the holding member and engaged with a second notch hole formed in the standing portion. . 7. The positioning device according to claim 1, further comprising a positioning member that is inserted into each of the armature core and the bobbin and that prevents a displacement of the bobbin attached to the teeth. 8. Linear motor. The armature core is
A yoke portion connecting the plurality of teeth;
The bobbin is
A winding part in which the teeth are inserted inside and the coil is wound outside;
A collar portion formed on one end side of the winding portion and in contact with the yoke portion;
A standing portion that is erected on a surface opposite to the winding portion of the collar portion,
The positioning member is
The linear motor according to claim 7, wherein the linear motor is a pin inserted into the yoke portion and the standing portion. The standing portion is
It is erected at two places on the surface of the collar portion with the yoke portion in between,
The pin is
The linear motor according to claim 8, wherein the linear motor is provided to penetrate through the yoke portion and the two standing portions. A linear motor having a field part and an armature part,
An armature core having a plurality of teeth;
A plurality of bobbins attached to each of the plurality of teeth;
A plurality of coils wound around each of the plurality of bobbins;
A plurality of positioning members that are inserted into each of the armature core and the plurality of bobbins, and prevent displacement of the bobbins mounted on the teeth;
A resin portion covering the lead wire;
The linear motor characterized by having. A method of manufacturing a linear motor having a field part and an armature part,
Attaching a bobbin with a coil wound around each of the teeth of the armature core;
Wiring at least one lead wire electrically connected to the coil;
Attaching a holding member for holding the lead wire to the bobbin;
Coating the lead wire with resin;
A method for manufacturing a linear motor, comprising:

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