JP2009189116A - Coreless linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a coreless linear motor wherein an armature can be efficiently assembled and the radiation performance is not impaired. <P>SOLUTION: The coreless linear motor includes: a stator 2 having a magnet attachment seat 10 having a recessed sectional shape; and a moving member 1 that is placed between the inner walls of the magnet attachment seat 10 and moves in the direction along the inner walls. The moving member 1 is formed by integrally molding an armature winding 4 comprised of multiple coils arranged in the direction of movement of the moving member 1 and an armature attachment seat 3 with the armature winding 4 attached thereto with resin 6. The stator 2 is formed by disposing multiple magnets 11 on each inner wall of the magnet attachment seat 10 so that their magnetic poles adjoining in the direction of movement are different from each other. The armature attachment seat 3 has a recessed portion 7 for housing the armature winding 4 and an armature connecting portion 5. The recessed portion 7 is formed by fitting the armature attachment seat 3 and an A member 8 and a B member together. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to the structure of a coreless linear motor.

  Conventionally, in a coreless linear motor, an armature mounting seat for mounting an armature winding and a mover composed of an armature winding composed of a plurality of coils arranged in a moving direction, a magnet mounting seat for mounting a permanent magnet, and a movement And a stator composed of permanent magnets arranged in a direction.

  The armature mounting seat of the mover has a concave portion having a concave cross section. An armature connection portion including a connection portion between one coil end portion of the coil, a connection portion between the coils, and a lead wire for energizing the coil and the coil is disposed in the concave shape portion. The inside of the concave portion and the armature winding are resin-molded, and the armature winding and the armature mounting seat are integrated.

  The magnet mounting seat of the stator has a concave portion having a concave cross section, and the permanent magnet having the S pole and the N pole is provided on each of the two wall surfaces of the concave portion of the magnet mounting seat. Are arranged so that the polarities adjacent to each other in the moving direction are different and the opposite polarities between the two wall surfaces are different, and the stator includes two rows of permanent magnets in the moving direction of the mover. ing.

  The mover is disposed between the two permanent magnet rows of the stator with a certain gap between the coil of the mover and the permanent magnet. The mover and the stator are attached to a mechanism such as a linear guide and configured to be relatively movable (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-322595 (pages 4 to 5, FIGS. 2 and 6)

  In Patent Document 1, in order to dissipate the Joule heat generated in the armature winding through the armature mounting seat, it is necessary to improve the heat transfer characteristics between the armature winding and the armature mounting seat. Therefore, it is better that there is less mold resin interposed between the armature winding and the armature mounting seat, and from this, from the viewpoint of heat dissipation, the width of the bottom surface of the concave portion of the armature mounting seat And it is better to reduce the height.

  However, since the concave shape portion is also a housing portion for the armature connection portion and the coil end portion of the coil constituting the armature winding, if the width of the concave shape portion is narrowed, the armature connection portion and the coil end portion There was a problem that the assembly workability when storing the material in the concave shape portion deteriorated. That is, there was a trade-off relationship between heat dissipation and assembly workability.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to obtain a coreless linear motor which has good armature assembly workability and does not impair heat dissipation.

A coreless linear motor according to the present invention includes a stator having a magnet mounting seat with a concave cross-sectional shape, and a mover that is arranged between inner walls of the magnet mounting seat and moves in a direction along the inner wall.
The mover is formed by integrally molding an armature winding composed of a plurality of coils and the armature winding and the armature mounting seat with a resin,
The stator is configured by arranging a plurality of magnets on each of the inner walls of the magnet mounting seat,
The armature mounting seat has a concave portion having a concave cross section perpendicular to the moving direction of the mover, and one coil end portion of the coil is connected to the concave portion and the coil is connected to each other In a coreless linear motor that houses an armature connection part including a connection part that connects a part and the coil and a lead wire that supplies current to the coil,
The armature mounting seat includes a plurality of members, and the concave portion is formed by fitting the plurality of members.

  According to the coreless linear motor of the present invention, since the assembly workability of the armature is good and the concave shape portion of the armature mounting seat can be made small, the mold resin volume in the concave shape portion can be reduced and the heat dissipation is good. A motor is obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 to 6 are diagrams for explaining the first embodiment of the coreless linear motor of the present invention. 1 is a perspective view of a coreless linear motor in which a mover and a stator are combined, FIG. 2 is a sectional view perpendicular to the moving direction of FIG. 1, and FIG. 3 is a diagram of two members constituting an armature mounting seat. FIG. 4 is a perspective view of the armature mounting seat in a state where two members are assembled, and FIG. 5 is a cross-sectional view of the mover in a state before the two members of the armature mounting seat are assembled. A cross section perpendicular to the moving direction of the child is shown. FIG. 6 is a perspective view of the armature mounting seat in a state in which two members are assembled, and a fitting portion of the two members is a perspective view.

  As shown in FIG. 1, the coreless linear motor of the present invention includes an armature mounting seat 3 to which an armature winding is attached and an armature winding 4 including a plurality of coils arranged in the moving direction of the mover 1. The mover 1 includes a magnet mounting seat 10 to which a permanent magnet 11 is attached, and a stator 2 that includes a permanent magnet 11 arranged in a moving direction. Here, the lead wire 26 supplies current to the coil of the armature winding 4.

  The magnet mounting seat 10 of the stator 2 is formed in a concave cross-sectional shape, and the permanent magnet 11 having an S pole and an N pole is placed on each inner wall surface of the concave mounting shape of the magnet mounting seat 10 in the moving direction of the mover 1. Adjacent polarities are different and the polarities facing each other between the inner wall surfaces are different. The stator 2 includes two rows of permanent magnets 11 in the moving direction of the mover 1. .

  The mover 1 is disposed between the inner walls of the magnet mounting seat 10 and between the coil of the mover and the permanent magnet via a certain gap. The armature mounting seat 3 is composed of a plurality of members, and the plurality of members are fitted together to form a concave portion 7 and the armature winding 4 is attached to the concave portion 7. The mover 1 and the stator 2 are attached to a mechanism (not shown) such as a linear guide and configured to be relatively movable.

  As shown in FIG. 2, the mover 1 is configured by integrally forming an armature winding 4 and an armature mounting seat 3 with a mold resin 6. The armature winding 4 is composed of a plurality of coils (not shown), and an armature connection portion 5 including a connection portion between the coils and a lead wire for supplying current to the coil and the coil is attached to the armature. It is arranged inside the concave portion 7 of the seat 3 and is molded with resin 6. In the first embodiment, the armature mounting seat 3 is composed of two members, an A member 8 and a B member 9.

  As shown in FIG. 3, a convex portion 12 and a concave portion 13 are formed at one end of the A member 8 in a direction orthogonal to the moving direction of the mover 1. The concave portions 13 are alternately formed, both ends in the moving direction are convex portions 12, and a claw portion 16 is formed at the tip of the convex portion 12. Further, a convex portion 25 protruding in the same direction as the convex portion 12 is formed at the other end of the A member 8.

  The B member 9 is formed with a convex portion 14 and a concave portion 15 in which the convex portion 14 is cut out. The convex portion 14 and the concave portion 15 are alternately formed in the moving direction of the mover 1, and both ends in the moving direction are A convex portion 14 is formed. A claw portion 17 is formed at the tip of the convex portion 14.

Between the length a1 of the convex portion 12 in the moving direction, the length a2 of the concave portion 13, the length b1 of the convex portion 14, and the length b2 of the concave portion 15, the convex portion 12 is the concave portion 15, and the convex portion 14 is the concave portion. 13, so that each can be inserted a1 <b2
a2> b1
And the convex portion 12, the concave portion 13, the convex portion 14, and the concave portion 15 are formed at a pitch that allows the convex portion 12 to be inserted into the concave portion 15 and the convex portion 14 to be simultaneously inserted into the concave portion 13. When the A member 8 and the B member 9 are assembled by inserting each convex portion into the concave portion and then sliding it in the moving direction of the mover 1 as shown by arrows in FIG. The claws 16 and 17 of each other are fitted to each other, and the concave portion 7 shown in FIG. 4 is formed.

  When assembling the mover 1, as shown in FIG. 5, the armature connected in advance with one coil end of the armature winding 4 in the recess formed by the projection 12 and the projection 25 of the A member 8. After housing the connecting portion 5, in the horizontal direction from the left side to the right side in the figure, the concave bottom surface 18 formed by the convex portion 12 and the convex portion 25 of the A member 8 and the top surface 19 of the claw portion 17 of the B member The B member 9 is inserted to a predetermined position while being slid, and is then slid in the direction perpendicular to the paper surface so that the claw portion 16 of the A member 8 and the claw portion 17 of the B member 9 are fitted together.

  As described above, since the concave portion 7 of the armature mounting seat 3 is formed by fitting two members of the A member 8 and the B member 9, the armature winding 4 and the armature connection portion 5 are formed. Since the concave member 7 can be formed by assembling the B member 9 to the A member 8 after being arranged between the convex portion 25 and the convex portion 12 of the wide A member, the armature mounting seat 3 is formed from one member. The assembly workability is better as compared with the case where the concave portion is formed on the one member.

  Moreover, since the width | variety of the concave shape part 7 can be narrowed, the mold resin 6 with which the concave shape part 7 is filled decreases, and heat dissipation is also improved.

  The concave portion 13 and the concave portion 15 shown in FIG. 3 may be omitted. However, when the A member 8 and the B member 9 are assembled by the presence of the concave portion 13 and the concave portion 15 as shown in FIG. A gap 20 is formed by the recess 13 and the recess 15 of the B member 9. When the armature winding 4 and the armature mounting seat 3 composed of the A member 8 and the B member 9 are integrally formed with the mold resin 6, the gap 20 is also molded with the mold resin 6, and the A member 8 and the B member 9 are Since they are fixed integrally with each other, it is not necessary to fix the A member 8 and the B member 9 with screws or the like, and the assembly workability is good.

Further, between the length a1 of the convex portion 12, the length a2 of the concave portion 13, the length b1 of the convex portion 14, and the length b2 of the concave portion 15, the convex portion 12 is the concave portion 15, and the convex portion 14 is the concave portion 13. In order to be able to insert each, a1 <b2
a2> b1
In addition, the convex portion 12, the concave portion 13, the convex portion 14, and the concave portion 15 are formed at a pitch at which the convex portion 12 can be inserted into the concave portion 15 and the convex portion 14 can be simultaneously inserted into the concave portion 13, and the bottom surface 18 and the top surface 19 are slid. By inserting the B member 9 into the A member 8, the armature connection portion 5 can be prevented from being bitten between the A member 8 and the B member 9.

Embodiment 2. FIG.
FIG. 7 is a cross-sectional view of the mover of the coreless linear motor according to the second embodiment of the present invention perpendicular to the moving direction of the mover. The A member 8 and the B member 9 constituting the armature mounting seat 3 are provided with flange portions 21 and 22 at a portion corresponding to the opening of the concave shape portion 7 of the armature mounting seat 3, and the concave shape portion 7 and the armature winding. 4 are formed in the direction of narrowing the gap with 4 respectively.

  By forming the flange portions 21 and 22 in this way, it is possible to prevent the armature connection portion 5 from protruding from the concave portion 7 when the B member 9 is assembled to the A member 8 in the assembly of the mover 1. Assembling workability is improved.

Embodiment 3 FIG.
FIG. 8 is a perspective view of the armature mounting seat of the mover of the coreless linear motor according to the third embodiment of the present invention. In the third embodiment, the armature mounting seat 3 is composed of three members: an A member 8, a C member 9a, and a D member 9b.

  As in the first embodiment, the A member 8 is formed with the convex portions 12 and 25 and the concave portion 13, and the convex portion 12 is formed with the claw portion 16. Similarly to the first embodiment, the C member 23 and the D member 24 are each formed with a convex portion 14 and a concave portion 15, and the convex portion 14 is formed with a claw portion 17.

  As shown by the arrows in FIG. 8, the C member 9a and the D member 9b are assembled to the A member 8 at the same time from the left and right sides or the C member 9a and the D member 9b one by one in order. Assemble from the same side.

  In this way, by configuring the armature mounting seat 3 with three or more members, there is an advantage that the armature mounting seat 3 can be assembled while confirming the arrangement state of the armature connection portion 5.

  In the third embodiment, an example in which the armature mounting seat 3 is configured by three members has been described. However, the A member 8 is configured by two or more members, and the B member is configured by two or more members. Or it cannot be overemphasized that this invention is similarly formed also about the case where the armature mounting seat 3 is comprised with four or more members.

  The coreless linear motor of the present invention can be effectively used as a conveying device for machine tools and the like.

It is a perspective view which shows the conventional coreless linear motor. It is sectional drawing perpendicular | vertical to a moving direction of the coreless linear motor by Embodiment 1 of this invention. It is a perspective view of the members A and B which comprise the armature mounting seat of the coreless linear motor by Embodiment 1 of this invention. It is a perspective view of the armature mounting seat of the state which assembled the members A and B of the coreless linear motor by Embodiment 1 of this invention. It is sectional drawing perpendicular | vertical to the moving direction of the needle | mover of the state before assembling the members A and B of the coreless linear motor by Embodiment 1 of this invention. It is a perspective view of the armature mounting seat of the state which assembled the members A and B of the coreless linear motor by Embodiment 1 of this invention. It is sectional drawing perpendicular | vertical to the moving direction of the needle | mover of the needle | mover of the coreless linear motor by Embodiment 2 of this invention. It is a perspective view of the armature attachment seat of the needle | mover of the coreless linear motor by Embodiment 3 of this invention.

Explanation of symbols

1 mover, 2 stator, 3 armature mounting seat, 4 armature winding, 5 armature connection,
6 mold resin, 7 concave part, 8 A member, 9 B member, 9a C member,
9b D member, 10 magnet mounting seat, 11 permanent magnet, 12, 14, 25 convex portion,
13, 15 recess, 16, 17 claw portion, 18 bottom surface, 19 top surface, 20 gap,
21, 22 buttock, 26 lead wire.

Claims (6)

A stator having a magnet mounting seat with a concave cross-sectional shape, and a mover arranged between the inner walls of the magnet mounting seat and moving in a direction along the inner wall,
The mover is formed by integrally molding an armature winding composed of a plurality of coils and the armature winding and the armature mounting seat with a resin,
The stator is configured by arranging a plurality of magnets on each of the inner walls of the magnet mounting seat,
The armature mounting seat has a concave portion having a concave cross section perpendicular to the moving direction of the mover, and one coil end portion of the coil is connected to the concave portion and the coil is connected to each other In a coreless linear motor that houses an armature connection part including a connection part that connects a part and the coil and a lead wire that supplies current to the coil,
The coreless linear motor, wherein the armature mounting seat includes a plurality of members, and the concave portion is formed by fitting the plurality of members. The member constituting the armature mounting seat is composed of an A member and a B member,
The A member has a convex portion formed at one end in a direction orthogonal to the moving direction of the mover and a convex portion having a claw-shaped tip at the other end in the direction orthogonal to the moving direction of the mover. Have
The B member has a claw-shaped convex part at the tip,
2. The coreless linear motor according to claim 1, wherein the concave portion is formed by fitting the convex portion of the A member and the convex portion of the B member. 3. The coreless linear motor according to claim 2, wherein the convex part of the A member and the convex part of the B member have concave parts cut out in the moving direction of the mover. The width of the concave portion of the A member in the moving direction of the movable element is larger than the width of the convex portion of the B member in the moving direction of the movable element, and the width of the concave portion of the B member in the moving direction of the movable element. The coreless linear motor according to claim 3, wherein a width of the convex portion of the A member is larger than a width in a moving direction of the mover. The coreless linear motor according to any one of claims 1 to 3, wherein a saddle-shaped flange is formed in an opening of the concave-shaped part of the armature mounting seat. 5. The armature mounting seat according to claim 2, wherein the A member is composed of two or more members, and the B member is composed of two or more members. The coreless linear motor described in 1.

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