JP2016073164A - Linear motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable linear motor, capable of obtaining a large thrust, capable of suppressing a failure caused by a deformation of movable elements attributed to unbalance of suction forces or a reactive force during operation.SOLUTION: A linear motor includes: a movable elements 5a, 5b formed by arranging permanent magnets 3 or magnetic materials while directions of magnetization are reversed; a first magnetic pole tooth and a second magnetic pole tooth disposed so as to sandwich the permanent magnets 3 or magnetic materials; magnetic poles 1, composed of a magnetic material, for connecting the first magnetic pole tooth and the second magnetic pole tooth to form a magnetic flux path; a coil wound around each of the first magnetic pole tooth and the second magnetic pole tooth; and support members 11a, 11b, 11c, for support the movable elements 5a, 5b. The plurality of magnetic poles 1 is disposed in a direction of travel of the movable elements 5a, 5b. The support members 11a, 11b, 11c are disposed at both ends and a center part in the direction of travel of the movable elements 5a, 5b of the disposed plurality of magnetic poles 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a linear motor, and more particularly to a linear motor suitable for generating a thrust for relatively moving horizontally between a permanent magnet and an armature of a mover.

  Patent Documents 1 to 3 disclose linear motors that generate thrust for horizontal movement between a permanent magnet and an armature of a mover.

  In Patent Document 1, the total attractive force between the mover and the armature that works perpendicular to the moving direction of the mover is canceled out to zero, thereby reducing the attractive force between the magnetic pole surface of the mover and the armature. It is described that the load on the support mechanism of the mover can be reduced.

  Patent Document 2 includes an electromagnet that excites a plurality of magnetic pole pairs opposed via an air gap with one coil, and the magnetic pole pairs are arranged in a straight line at a pitch P and are adjacent to each other by excitation of the coil. A stator configured such that the direction of the magnetic field of the pair is reversed; a mover in which permanent magnets are arranged at equal intervals at a pitch P; and the direction of the magnetic field of the magnetic poles of adjacent permanent magnets is reversed; The linear motor is provided with a mover permanent magnet that moves between air gaps, and the magnetic attractive force acting between the stator and mover cancels on both sides of the permanent magnet. Therefore, it is described that the burden on the support mechanism of the mover is small, and there are effects such as improving the reliability of the linear motor.

  On the other hand, in Patent Document 3, the magnet case for fixing the permanent magnet of the mover has a four-axis configuration, and the magnet case configured to the four axes is connected by connecting parts, and between the magnetic poles of each phase and of the magnetic poles. It is described that the end is sandwiched between magnetic pole holding parts, and the magnet case is held by a support part (consisting of a roller, a roller bearing, or a linear guide) installed on the magnetic pole holding part.

Japanese Patent No. 3906443 Japanese Patent No. 4106571 JP 2011-223697 A

  However, in the linear motors described in Patent Documents 1 and 2, the magnetic force composed of the magnetic pole, the iron core, and the magnetic pole teeth with respect to the permanent magnet is not symmetric. Further, when magnetic saturation of a magnetic body composed of a magnetic pole, an iron core, and magnetic pole teeth occurs, there is a problem that the magnetic flux of the winding acts directly on the permanent magnet and the attractive force increases. In addition, the use of large thrust has been expanded to increase the size of the linear motor transported goods and the productivity of equipment equipped with the linear motor, and the attraction force is generated by increasing the opposing area between the permanent magnet and the magnetic pole due to the increased thrust. Was a problem.

  Also, in order to increase the thrust, when multiple windings of a linear motor are arranged, imbalance between the windings (for example, the length of the lead wire of the winding, the length of the wire due to manufacturing errors, Due to variations in contact resistance and the like, an attractive force is generated due to imbalance between the windings, causing deformation of the mover, and failure due to contact between the mover and the magnetic pole.

  On the other hand, Patent Document 3 describes that a magnet case for fixing a permanent magnet of a mover is held by a support component installed in a magnetic pole holding component, but deformation or the like occurs in the magnet case (mover). No countermeasures are described at all.

  The present invention has been made in view of the above-mentioned points, and the object of the present invention is to obtain a large thrust and to suppress a failure caused by a deformation of the mover due to an unbalance of suction force or a reaction force during operation. The object is to provide a highly reliable linear motor.

  In order to achieve the above object, the linear motor of the present invention is arranged so as to sandwich a mover formed by arranging a plurality of permanent magnets or magnetic materials while reversing the magnetization direction, and the permanent magnets or magnetic materials. A first magnetic pole tooth and a second magnetic pole tooth; a magnetic pole formed of a magnetic material that connects the first magnetic pole tooth and the second magnetic pole tooth to form a magnetic flux path; and the first magnetic pole tooth and the second magnetic pole tooth A plurality of magnetic poles arranged in the advancing direction of the mover, and the support member includes the plurality of the support members. The magnetic poles installed are disposed at both ends and a center of the moving element in the traveling direction.

  According to the present invention, it is possible to obtain a high-reliability linear motor that can obtain a large thrust and suppress a failure caused by a deformation of the mover due to an unbalance of suction force or a reaction force during operation.

It is a perspective view which shows Example 1 of the linear motor of this invention. It is a side view (figure seen from the X-axis direction) of the linear motor in FIG. FIG. 3 is a view taken along the line AA of the linear motor in FIG. 2 and viewed from the Z-axis direction. FIG. 3 is a view taken along the line BB of the linear motor in FIG. 2 and viewed from the Z-axis direction. It is the perspective view of the state which cut off the upper side of the linear motor in FIG. It is a figure which shows the positional relationship of the coil | winding and support component in Example 1 of the linear motor of this invention. It is a perspective view which shows Example 2 of the linear motor of this invention. It is a perspective view of the state which cut off the upper side of the linear motor in FIG. It is a perspective view which shows the 4th supporting member provided with the 4th supporting component employ | adopted as Example 2 of the linear motor of this invention. FIG. 8 is a top view of the linear motor in FIG. 7 (viewed from the Y-axis direction) for explaining the effect of the linear motor according to the second embodiment of the present invention. It is a schematic diagram for demonstrating the deformation | transformation of a needle | mover in Example 2 of the linear motor of this invention, and the effect of a support component. It is a figure which shows the 1st supporting member in Example 3 of the linear motor of this invention. It is a perspective view which shows Example 4 of the linear motor of this invention. It is a perspective view of the state which cut off the upper side of the linear motor in FIG. It is a perspective view of the state which cut off the side surface side of the linear motor in FIG. It is a figure which shows the 1st supporting member in Example 5 of the linear motor of this invention. It is a figure which shows the 3rd supporting member in Example 5 of the linear motor of this invention.

  The linear motor of the present invention will be described below based on the illustrated embodiments. In each embodiment, the same reference numerals are used for the same components, and the same description is not repeated. Further, in each embodiment, the X direction, the Y direction, and the Z direction represent directions as shown in the drawings, and the X direction, the Y direction, and the Z direction are referred to as the left-right direction, the up-down direction, and the front-rear direction, respectively. There is no need for the vertical direction to be parallel to the direction of gravity. For example, the horizontal direction, the front-rear direction, and other directions are allowed to be parallel to the direction of gravity.

  1 to 6 show a first embodiment of a linear motor according to the present invention.

  As shown in the figure, the linear motor of the present embodiment is arranged so that the permanent magnet 3 is sandwiched between the movers 5a and 5b formed by arranging a plurality of permanent magnets (or magnetic materials) 3 while reversing the magnetization direction. The magnetic pole teeth 1a and 1d as the first magnetic pole teeth and the magnetic pole teeth 1b and 1c as the second magnetic pole teeth and the magnetic pole teeth 1a, 1b, 1c and 1d are connected to form a magnetic body 1e which forms a magnetic flux path. The magnetic pole 1, the windings 2a, 2b, 2c, and 2d wound around the magnetic pole teeth 1a, 1b, 1c, and 1d, the first support member 11a that supports the movers 5a and 5b, and the second support It is roughly composed of a member 11b and a third support member 11c.

  More specifically, the movers 5 a and 5 b of this embodiment are composed of a permanent magnet 3 and a mover holder 4, and the permanent magnet 3 is fixed to the magnet holder 4. Further, the permanent magnets 3 of the movers 5a and 5b are arranged so that a pole is formed on the surface facing the magnetic pole 1. Therefore, the magnetization direction of the permanent magnet 3 is the X direction or the −X direction, and the polarities alternate between the N pole and the S pole between the adjacent permanent magnets 3. By passing a current through the windings 2a, 2b, 2c and 2d, poles are generated in the magnetic pole teeth 1a, 1b, 1c and 1d, and the interaction between the poles of the magnetic pole teeth 1a, 1b, 1c and 1d and the poles of the permanent magnet 3 Thus, the movers 5a and 5b are driven in the Z direction.

  Further, the number of phases of the linear motor formed by the pitch P in the Z direction between the permanent magnet 3 and the magnetic pole 1 changes. For example, if the pitch of the magnetic poles 1 is 2P with respect to the pitch P in the Z direction of the permanent magnet 3, a single-phase drive linear motor is obtained.

  Thus, the number of phases of the linear motor is changed by changing the pitch of the permanent magnet 3 and the magnetic pole 1 in the Z direction. Note that the present invention does not limit the number of phases of the linear motor.

  The present embodiment is an example in which a linear motor is configured by 12 magnetic poles 1, and 12 magnetic poles 1 are provided in the traveling direction of the movers 5 a and 5 b. A first support member 11 a is arranged at one end of the twelve magnetic poles 1, and a second support member 11 b is arranged at the other end, and at the intermediate portion (center portion) of the twelve magnetic poles 1. A third support member 11c is arranged.

  The first support member 11a, the second support member 11b, and the third support member 11c include a first support component 10a, a second support component 10b, and a third support member for supporting the movers 5a and 5b. Support parts 10c are respectively provided, and the first support part 10a, the second support part 10b, and the third support part 10c are supported at both ends in the width direction (Y direction) of the movers 5a and 5b. Provided on the first support member 11a, the second support member 11b, and the third support member 11c, the movers 5a and 5b support the first support so as to sandwich both ends in the width direction of the movers 5a and 5b. It is supported by the component 10a, the second support component 10b, and the third support component 10c.

  The first support component 10a, the second support component 10b, and the third support component 10c are any one of a roller, a linear guide, and a sliding bearing, and can support the movers 5a and 5b. If possible, the method does not matter.

  Next, the arrangement of the first support component 10a, the second support component 10b, and the third support component 10c that support the movers 5a and 5b will be described with reference to FIG. FIG. 3 is an example of the arrangement of the first support component 10a installed on the first support member 11a.

  As shown in the figure, the left and right (X direction) movers 5a and 5b are first support components 10a provided on the first support member 11a, respectively, and the widthwise ends of the movers 5a and 5b are respectively connected. It is held so as to be sandwiched from the left and right.

  In order to increase the thrust of the linear motor, it is effective to increase the facing area between the permanent magnet 3 and the magnetic pole 1, but as a result of increasing the facing area between each permanent magnet 3 and the magnetic pole 1, The interval in the Z direction between 1 becomes longer, and the movers 5a and 5b are bent.

  Therefore, in this embodiment, as described above, the first support component 10a at the end of one magnetic pole 1 is used as the first support point, and the second support component 10b at the end of the other magnetic pole 1 is used as the first support point. In the case of the second support point, by providing a third support point (third support component 10c) at the center between the first support point and the second support point, the movers 5a and 5b The deformation (deflection) is suppressed.

  The force which acts on the permanent magnet 3 of the two movers 5a and 5b will be described with reference to FIG. FIG. 4 is an example of the force acting on the permanent magnets 3 of the movers 5a and 5b supported by the second support component 10b installed on the second support member 11b.

  As shown in the figure, magnetic pole teeth 1a and magnetic pole teeth 1b are arranged so as to face the front and back of the permanent magnet 3 of the mover 5a. A winding 2a is wound around the magnetic pole tooth 1a, and a winding 2b is wound around the magnetic pole tooth 1b. The magnetic pole teeth 1a and the magnetic pole teeth 1b have the same shape, but if there is a difference in the currents of the windings 2a and 2b due to an imbalance in the electrical resistance between the windings 2a and 2b, the permanent magnet 3 Receives suction in the X direction. The same applies to the permanent magnet 3 of the mover 5b. Furthermore, the coil | winding 2a exists in the left side (-X side) of the permanent magnet 3 of the needle | mover 5a. On the other hand, the winding 2b, the winding 2c wound around the magnetic pole teeth 1c, and the winding 2d wound around the magnetic pole teeth 1d exist on the right side (+ X side) of the permanent magnet 3 of the mover 5a. A suction force is also generated by the left-right imbalance between the winding 2a, the winding 2b, the winding 2c, and the winding 2d.

  At a relatively small current value at which magnetic saturation does not occur in the magnetic pole 1, the magnetic pole teeth 1a, 1b, 1c and 1d form a closed magnetic circuit by the magnetic body 1e connecting the magnetic pole teeth 1a, 1b, 1c and 1d. Although the influence of the left and right imbalance between the winding 2a and the winding 2b, the winding 2c and the winding 2d is small, when the magnetic saturation occurs in the magnetic pole 1, the influence of the left and right imbalance becomes large and the permanent magnet 3 is not affected. The suction power increases. Due to this influence, the deformation of the movers 5a and 5b becomes large.

  Therefore, in this embodiment, the first support component 10a at one end of the magnetic pole 1 is the first support point, and the second support component 10b at the end of the other magnetic pole 1 is the second support point. In this case, by providing a third support point (third support component 10c) at the center between the first support point and the second support point, the movable elements 5a and 5 are deformed due to the above-described influence. It is intended to suppress.

  The arrangement of the first support component 10a, the second support component 10b, and the third support component 10c that support the movers 5a and 5b of this embodiment will be described with reference to FIG. FIG. 5 shows the top surface of the linear motor cut out in the XZ plane for the sake of explanation. The first support component 10a, the second support component 10b, and the third support component 10a of the left movable element 5a are shown using FIG. The arrangement of the support component 10c will be described.

  As shown in the figure, a first support member 11a having a first support component 10a is installed on the front side (-Z side) of 12 magnetic poles 1 arranged side by side, and the back side (Z side) of the magnetic pole 1 ) Is provided with a second support member 11b having a second support component 10b, and in the present embodiment, a third support member 11b is provided at the center between the first support member 11a and the second support member 11b. A third support member 11c having a support component 10c is arranged, and the movable element 5a is supported by each of the first support member 11a, the second support member 11b, and the third support member 11c.

  As described above, when the movable element 5a is deformed by the attractive force generated by unbalance between the windings 2 and the like, and there is no third support member 11c having the third support part 10c, the first support part The moment at the suction force generation point away from 10a and the second support component 10b increases, and the amount of deformation of the mover 5a becomes the largest. The suction force generation point away from the first support component 10a and the second support component 10b is an intermediate point (center point) in the Z direction between the first support component 10a and the second support component 10b. This is the position of the support component 10c.

  Therefore, the deformation of the mover 5a can be effectively suppressed by arranging the third support component 10c at the intermediate point in the Z direction between the first support component 10a and the second support component 10b.

  In FIG. 5, the plurality of upper support parts existing in the Y direction of the mover 5 a have been described. However, the upper support parts are not limited to one, and the same applies to the lower support parts.

  The relationship between the windings 2a, 2b, 2c and 2d and the first support component 10a, the second support component 10b and the third support component 10c will be described with reference to FIG. FIG. 6 is an example of the second support component 10b installed on the second support member 11b.

  As shown in the figure, when the interval between the second support parts 10b arranged in the Y direction is Lp with respect to the width Lw in the Y direction of the windings 2a, 2b, 2c and 2d, Lw ≦ Lp The second support component 10b can be arranged without interfering with the windings 2a, 2b, 2c and 2d (the same applies to the first support component 10a and the third support component 10c). Therefore, there is an effect that the second support component 10b can be arranged without increasing the interval between the magnetic poles 1 (the same applies to the first support component 10a and the third support component 10c).

  Thus, according to the configuration of the present embodiment, a large thrust can be obtained, and failures caused by the deformation of the movers 5a and 5b due to the unbalance of the suction force or the reaction force during operation are suppressed, and reliability is improved. High linear motor can be obtained.

  7 to 9 show a second embodiment of the linear motor of the present invention.

  As shown in FIG. 7, the linear motor according to the present embodiment includes a first support member 11a having a first support component 10a at one end of twelve magnetic poles 1 and a second support at the other end. A second support member 11b including the support component 10b is disposed, and a third support member 11c including the third support component 10c is disposed at the center of the 12 magnetic poles 1 in the Z direction. Yes.

  In the present embodiment, the lead portions 2e of the windings 2a, 2b, 2c, and 2d are projected from between the magnetic poles 1, and at the end portions of the two movers 5a and 5b in the Z direction, 5 b are connected by a connecting member 12.

  Further, in this embodiment, as shown in FIGS. 7 and 8, the first support member 11a having the first support component 10a and the third support member 11c having the third support component 10c are provided. The fourth support member 11d provided with the fourth support component 10d is composed of the second support member 11b provided with the second support component 10b and the third support member 11c provided with the third support component 10c. In the middle, fifth support members 11e each having a fifth support component 10e are arranged. That is, between each of the first, second, and third support members 11a, 11b, and 11c disposed at both ends and the center of the moving elements 5a and 5b of the magnetic pole 1 provided in plurality, The fourth and fifth support members 11d and 11e are arranged.

  Here, the first support member 11a, the second support member 11b, the third support member 11c, the fourth support member 11d, the first support component 10a of the fifth support member 11e, and the second support component. 10b, the third support component 10c, the fourth support component 10d and the fifth support component 10e and the relationship between the windings 2a, 2b, 2c and 2d, Lw ≦ Lp shown in FIG. Interference between the wires 2a, 2b, 2c and 2d and the first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d and the fifth support component 10e is eliminated. The first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d, and the fifth support component 10e can be disposed therebetween.

  In this way, the first support member 11a, the second support member 11b, the third support member 11c, the fourth support member 11d, and the fifth support member 11e are arranged between the plurality of magnetic poles 1. Thus, the first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d and the fifth support component 10e can be arranged without increasing the interval between the magnetic poles 1. Even if a large number of the first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d, and the fifth support component 10e are installed, the size of the linear motor does not increase. .

  Further, by using the first support member 11a, the second support member 11b, the third support member 11c, the fourth support member 11d, and the fifth support member 11e between the magnetic poles 1 as magnetic bodies, the magnetic path Since the magnetic saturation of the magnetic pole 1 can be relaxed, the attractive force can be reduced.

  The first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d, and the fifth support component 10e are connected to the magnetic pole teeth 1a, 1b, 1c, and 1d. By disposing inside the body 1e, the first support component 10a, the second support component 10b, the third support component 10c, the fourth support component 10d, and the fifth support component 10e are damaged. There is an advantage in that it is not necessary to prevent scattering and to make a protrusion on the linear motor, and a small linear motor can be configured.

  FIG. 9 shows a configuration example of the fourth support member 11d provided with the fourth support component 10d described above.

  As shown in the figure, the fourth support member 11d includes four fourth support components 10d on the upper side and the lower side, respectively, and the fourth support member 11d includes windings 2a and 2b. 2c and 2d are provided in the grooves 13, and the windings 2a, 2b, 2c and 2d are held in the grooves 13, so that the windings 2a, 2b, 2c and 2d can be made electromagnetically Damage to the windings 2a, 2b, 2c and 2d due to the working force can be reduced, and the reliability of the linear motor can be improved.

  Next, the effects of this embodiment will be described with reference to FIGS.

  As described above, the first support member 11a, the second support member 11b, the third support member 11c, the fourth support member 11d, and the fifth support are provided between both ends of the twelve magnetic poles 1 and between the magnetic poles 1. The member 11e is arranged, and the movers 5a and 5b are arranged so as to penetrate the twelve magnetic poles 1. The movers 5a and 5b are connected by connecting members 12 at both ends in the Z direction. In the mover 5a on the -X direction side, there is a winding 2a on the -X direction side of the mover 5a. On the side are windings 2b, 2c and 2d.

  Therefore, the number of windings 2b, 2c and 2d in the X direction becomes unbalanced, and a suction force in the X direction is generated as viewed from the mover 5a. When viewed from the mover 5b, the winding 5d is on the X direction side of the mover 5b, and the windings 2a, 2b, and 2c are on the -X direction side. Therefore, the suction force works in the −X direction. That is, a suction force acts on the central axis 22 side in the traveling direction of the movers 5a and 5b when viewed from the movers 5a and 5b. Therefore, it is effective to dispose the support component on the side of the central axis 22 in the traveling direction of the movers 5a and 5b when viewed from the movers 5a and 5b.

  FIG. 11A shows a case where the first support component 10a and the second support component 10b are provided on both sides of the magnetic pole range 21 in the Z direction. In this case, the moving direction of the movers 5a and 5b is shown. A suction force 20 acts on the central axis 22 side. Therefore, by providing the third support component 10c at the center of the range 21 of the magnetic pole 1, as shown in FIG. 11B, the attractive force 20 toward the central axis 22 in the traveling direction of the movers 5a and 5b. The deformation | transformation with respect to can be suppressed.

  By the way, the end portions of the movers 5a and 5b are moved toward the center axis 22 in the moving direction of the movers 5a and 5b by the suction force 20 toward the center axis 22 in the moving direction of the movers 5a and 5b. And try to spread to the other side. Therefore, as shown in FIG. 11 (c), by disposing the connecting member 12 at the ends of the movers 5a and 5b, the displacement of the central part of the movers 5a and 5b can be suppressed. And the magnetic pole teeth 1a, 1b, 1c and 1d can be prevented.

  Even if comprised in this way, the effect similar to Example 1 can be acquired.

  FIG. 12 shows a third embodiment of the linear motor of the present invention.

  In the present embodiment shown in the figure, the first support member 11a is provided at the intermediate portion between the first support components 10a supporting the upper and lower ends in the width direction (Y direction) of the movers 5a and 5b. Another provided first support component 10a 'is installed. That is, in addition to the configuration of the first embodiment shown in FIG. 3, another first support component 10a ′ is installed in the intermediate portion between the first support components 10a.

  That is, as the opposing area of the permanent magnet 3 and the magnetic pole teeth 1a, 1b, 1c and 1d increases, the movers 5a and 5b bend and deform in the XY plane shown in FIG. Therefore, in the present embodiment, another first support component 10a ′ is provided in the middle part between the first support components 10a that support the upper and lower ends of the movers 5a and 5b in the Y direction, so The bending and deformation of the movers 5a and 5b are suppressed.

  Even if it comprises in this way, the effect similar to Example 1 can be acquired, and the bending and deformation | transformation of the needle | mover 5a and 5b in XY plane can be suppressed.

  13 to 15 show a linear motor according to a fourth embodiment of the present invention. The present embodiment shown in the figure is a modification of the third embodiment shown in FIG.

  That is, in this embodiment, two other first support components 10a ′ are provided between the first support components 10a that support the upper and lower ends of the movers 5a and 5b in the Y direction, and are movable at four locations. The elements 5a and 5b are supported to suppress the bending and deformation of the movers 5a and 5b in the XY plane.

  In the present embodiment, similarly to the above-described embodiment, the first support component 10a, the second support component 10a, and the second support component 10a are arranged at both ends of the twelve magnetic poles 1 and the central portion of the twelve magnetic poles 1. The first support member 11a, the second support member 11b, and the third support member 11c having the three support components 10c are provided, and the first support member 11a, the second support member 11b, and the second support member 11c are provided. A plurality of support members including the three support members 11c are arranged alternately with the magnetic poles 1 between the twelve magnetic poles 1 arranged so as to support the movers 5a and 5b with support parts.

  By adopting such a configuration of the present embodiment, it is possible to obtain the same effect as that of the first embodiment, and of course, it is possible to suppress the deformation of the movers 5a and 5b, and to move the movers 5a and 5b to the magnetic pole teeth 1a and 1b. Negotiations due to contact of 1c and 1d can be reduced.

  In the present embodiment, two other first support components 10a ′, 12 both end portions of the 12 magnetic poles 1 and 12 are arranged between the first support components 10a that support both ends in the Y direction. A configuration in which the magnetic poles 1 and the supporting members are alternately provided in the central portion of the magnetic pole 1 between the first supporting component 10a, the second supporting component 10b, the third supporting component 10c, and the twelve magnetic poles 1 arranged side by side. However, for example, a support member provided with support parts may be arranged intermittently between twelve magnetic poles 1 arranged, or a support member provided with support parts every three magnetic poles 1 may be provided. A support member provided with a holding part can be selected arbitrarily.

  16 to 17 show a fifth embodiment of the linear motor of the present invention. 16 shows an example of the first support component 10a installed on the first support member 11a, and FIG. 17 shows an example of the third support component 10c installed on the third support member 11c.

  The movers 5a and 5b in the linear motor of the present embodiment shown in FIG. 16 are fixed to the permanent magnet 3, the first magnet holder 4a for fixing the permanent magnet 3, and the first magnet holder 4a. The portion of the second magnet holder 4b in contact with the first support component 10a and the portion of the second magnet holder 4b in contact with the first support component 10a are made thicker so that the mover 5a and The deformation of 5b can be suppressed.

  Thereby, the cross-sectional shapes of the movers 5a and 5b are H-shaped by the upper and lower (Y direction) second magnet holder 4b, the first magnet holder 4a and the permanent magnet 3 connecting them, and the windings 2a, A linear motor can be configured without interference between 2b, 2c and 2d and the magnetic pole 1.

  In addition, by making the shape of the first support component 10a that supports the movers 5a and 5b into a stepped shape, it becomes possible to suppress the Y direction of the movers 5a and 5b, and the Y direction of the movers 5a and 5b. It is possible to prevent the windings 2a, 2b, 2c and 2d and the movers 5a and 5b from coming into contact with each other due to vibration and displacement. In particular, in the case of the H-shaped movers 5a and 5b, when the thickness of the second magnet holder 4b in the portion in contact with the first support component 10a is increased in the X direction, the movers 5a and 5b The windings 2a, 2b, 2c, and 2d and the movers 5a and 5b come into contact with each other due to vibration and displacement in the Y direction, and the insulating layers of the windings 2a, 2b, 2c, and 2d are damaged. May occur. By making the shape of the first support component 10a that supports the movers 5a and 5b into a stepped shape, the operations of the movers 5a and 5b are stabilized, and the displacement of the movers 5a and 5b other than in the Z direction can be reduced. There are advantages. The operation of the movers 5a and 5b can also be stabilized by making the shape of the first support component 10a or the contact portions of the movers 5a and 5b with the first support component 10a V-shaped.

  An installation region of the third support component 11c formed of a magnetic material disposed between the magnetic poles 1 in this embodiment will be described with reference to FIG.

  In FIG. 17, the third support component 11c disposed between the magnetic poles 1 is formed of a magnetic material. By forming the third support component 11c of a magnetic material, the magnetic path can be expanded. 1 can be relaxed. In this case, in order to effectively link the magnetic flux generated by the windings 2a, 2b, 2c, and 2d to the permanent magnet 3, a magnetic material is disposed on the outer peripheral side of the windings 2a, 2b, 2c, and 2d. preferable. The outer peripheral side region 23 of the windings 2a, 2b, 2c and 2d is arranged on the outer peripheral side of the windings 2a, 2b, 2c and 2d which are arranged so as to sandwich the permanent magnet 3, thereby reducing the leakage magnetic flux. is there.

  In each of the embodiments of the present invention described above, the linear motor in the case where 12 magnetic poles 1 are arranged has been described. However, the linear motor of the present invention is not limited to this number of magnetic poles.

  Further, in each of the above-described embodiments of the present invention, the case where the mover is configured in two stages has been described. However, the unbalance of two or more windings is eliminated, and the mover having three or more stages is used. The same effect can be obtained even when the structure and the mover are one stage.

  Further, the linear motor in each of the above-described embodiments can be used as a linear drive system such as an injection molding machine or a press machine, or as an operating device for a power switchgear.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. It is possible to add, delete, and replace the configuration of a part of the configuration of the embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Magnetic pole, 1a, 1b, 1c, 1d ... Magnetic pole tooth, 1e ... Magnetic body which connects magnetic pole tooth, 2a, 2b, 2c, 2d ... Winding, 2e ... Winding extraction part, 3 ... Permanent magnet, 4 ... Magnet Holder, 4a ... first magnet holder, 4b ... second magnet holder, 5a, 5b ... mover, 10a ... first support component, 10b ... second support component, 10c ... third support component, 10d ... fourth support component, 10e ... fifth support component, 10a '... another first support component, 11a ... first support member, 11b ... second support member, 11c ... third support member, 11d: fourth support member, 11e: fifth support member, 12: connecting member, 13: groove, 20 ... attractive force, 21 ... magnetic pole range, 22 ... central axis in the central direction of the mover, 23 ... winding The outer area of the line.

Claims (15)

A mover formed by arranging a plurality of permanent magnets or magnetic materials while reversing the magnetization direction, and first and second magnetic pole teeth arranged so as to sandwich the permanent magnets or magnetic materials, the first A magnetic pole made of a magnetic material that connects the second magnetic pole teeth and the second magnetic pole teeth to form a path of magnetic flux, a winding wound around each of the first magnetic pole teeth and the second magnetic pole teeth, and A support member for supporting the mover,
A plurality of the magnetic poles are installed in the moving direction of the mover, and the support members are arranged at both ends and a center of the moving poles in the moving direction of the mover. Linear motor. The linear motor according to claim 1,
Each of the support members is provided with a support component that supports the mover. The linear motor according to claim 2,
The linear motor is characterized in that the support member is made of a magnetic material. The linear motor according to claim 2,
The support component is provided on each support member at a position to be supported at both ends in the width direction of the mover, and the mover is supported by the support component so as to sandwich the both ends in the width direction of the mover. A linear motor characterized by being supported. The linear motor according to claim 4,
The linear motor is characterized in that the support component is arranged inside the magnetic body that connects the first magnetic pole teeth and the second magnetic pole teeth to form a magnetic flux path. The linear motor according to claim 4,
The linear motor according to claim 1, wherein the support component is one of a roller, a linear guide, and a sliding bearing. The linear motor according to claim 4,
The width of the winding wound around each of the first magnetic pole teeth and the second magnetic pole teeth is Lw, and is provided on each of the support members at a position to be supported at both ends in the width direction of the mover. A linear motor having a relationship of Lw ≦ Lp, where Lp is the interval in the width direction of the support component. The linear motor according to claim 1,
A linear motor in which at least one support member is further arranged between each of the plurality of magnetic poles arranged in the direction of travel of the mover and the support members arranged at the center. . The linear motor according to claim 8, wherein
A groove for holding a lead wire of the winding is provided in the support member disposed between both end portions and a center portion of the mover in the moving direction of the plurality of magnetic poles. A linear motor. The linear motor according to claim 1,
At least two of the movable elements are provided side by side so that the moving directions of the movable elements are substantially parallel, and the two movable elements are connected to each other in the moving direction by a connecting member. A linear motor characterized by The linear motor according to claim 4,
A linear motor, wherein at least one other support component provided on each of the support members is installed between the support components supporting both ends of the movable element in the width direction. The linear motor according to claim 11,
The support member provided with the support member and the magnetic pole are alternately or intermittently between the support members disposed at both ends of the mover in the traveling direction, or the support member is provided for every three magnetic poles. A linear motor characterized by being arranged. The linear motor according to claim 4,
The movable element includes a permanent magnet, a first magnet holder that fixes the permanent magnet, and a second magnet holder that is fixed to the first magnet holder and supports the support component in contact with the movable magnet. The child is a linear motor characterized in that its cross-sectional shape is H-shaped. The linear motor according to claim 4,
The movable element includes a permanent magnet, a first magnet holder that fixes the permanent magnet, and a second magnet holder that is fixed to the first magnet holder and supports the support component in contact with the movable magnet. A linear motor characterized in that the support component for supporting a child has a stepped shape. The linear motor according to claim 4,
The movable element includes a permanent magnet, a first magnet holder that fixes the permanent magnet, and a second magnet holder that is fixed to the first magnet holder and supports the support component in contact with the movable magnet. A linear motor characterized in that the shape of the support component for supporting the child or the contact portion thereof is V-shaped.

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