JP2008035698A - Armature for linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an armature for a linear motor which can efficiently cool pole teeth and an exciting winding. <P>SOLUTION: The armature for the linear motor has a core 313 including a yoke 321 extending in a straight line and a plurality of pole teeth 339 which are arranged in the longitudinal direction of the yoke 321, and a plurality of phases of exciting windings which are partially arranged in the plurality of slots of the core 313 for exciting the plurality of pole teeth. Piping 317 for cooling is laid so as to sandwich the exciting windings inside the plurality of slots. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an armature for a linear motor.

A plurality of steel plates are laminated to each other, and a core is provided with a plurality of pole teeth, and a part is arranged in a plurality of slots formed between two adjacent pole teeth of this core to excite the pole teeth. An armature for a linear motor having an exciting winding is known. In Japanese National Publication No. 10-511837, in this type of armature for a linear motor, cooling piping is laid between the excitation windings and yokes in a plurality of slots in order to cool the excitation windings. An example is shown.
Japanese National Patent Publication No. 10-511837

  However, in such a conventional armature for a linear motor, the pole teeth and the excitation winding cannot be efficiently cooled.

  An object of the present invention is to provide an armature for a linear motor that can efficiently cool pole teeth and exciting windings.

  The armature for a linear motor to be improved by the present invention has a core and a plurality of phases of excitation windings. The core is configured by laminating a plurality of steel plates, and includes a yoke extending linearly in a direction perpendicular to the laminating direction of the steel plates and a plurality of pole teeth arranged along the longitudinal direction of the yoke. A plurality of pole teeth are arranged at intervals in the longitudinal direction so as to form a slot between two adjacent pole teeth, and one end located on the side opposite to the magnetic pole surface of the plurality of pole teeth is on the yoke. Are combined. The multi-phase excitation winding has a plurality of excitation windings that are partially disposed in the plurality of slots of the core and that excite the plurality of pole teeth. In the present invention, cooling pipes are laid in the plurality of slots so as to sandwich the excitation winding therebetween. If the cooling pipes are laid in this way, the pole teeth and the excitation winding can be efficiently cooled.

  The yoke can be composed of a yoke block formed separately from the pole teeth. In the engaged portion to which the plurality of pole teeth of the yoke block are coupled, there are a plurality of pole tooth fixing fitting holes in the longitudinal direction that open in both the lamination direction of the steel plates and the direction toward the pole teeth, respectively. Form at intervals. In addition, a plurality of wedge press-fitting fitting holes are formed in the engaged portion of the yoke block and open in both directions in the stacking direction of the steel plates and in the direction toward the slot. Here, the wedge press-fitting fitting hole allows the wedge to be press-fitted from the opening located in the stacking direction, but has a shape that prevents the wedge from dropping from the opening toward the slot. In addition, the pole tooth fixing fitting hole has a shape that allows loose insertion of the pole teeth from the opening located in the stacking direction but prevents the pole teeth from dropping from the opening toward the pole teeth. ing. The one or two pole tooth fixing fitting holes adjacent to the wedge press-fitting fitting hole are arranged so that when the wedge is press-fitted into the adjacent wedge press-fitting fitting hole, It has a deformable shape so that the fitting state between the one end and the pole tooth fixing fitting hole is a strong fitting state.

  In such an armature for a linear motor, first, one end of the pole teeth is inserted into one of the pole tooth fixing fitting holes from one opening in the stacking direction of the steel plates. Next, the wedge is press-fitted into the wedge press-fitting fitting hole from the opening in the laminating direction of the steel plates to couple the pole teeth and the yoke block. When the wedge is press-fitted in this manner, the wall portion around the wedge press-fitting fitting hole is pushed out by the wedge. Along with this, the pole tooth fixing fitting hole adjacent to the wedge press fitting hole is deformed, and the fitting state between one end of the pole tooth and the pole tooth fixing fitting hole is strengthened. For this reason, according to the present invention, by increasing the pressure input into the wedge press-fitting fitting hole of the wedge, the pole teeth and the yoke block can be sufficiently brought into close contact with each other, and the magnetic resistance therebetween is reduced. it can. Further, in the linear motor armature of the present invention, the pole teeth and the yoke block can be coupled simply by press-fitting the wedge into the wedge press-fitting fitting hole.

  The core has a structure in which a plurality of pole teeth are connected to each other by a bridging portion that substantially closes openings on the magnetic pole surface side of the plurality of slots, and a pole tooth connection block having a single structure. And a yoke block formed separately. In this way, there is no variation in magnetic flux density due to the bridging portion, and the cogging torque can be reduced.

  When the wedge is press-fitted into the adjacent wedge press-fitting fitting hole, the fitting state between one end of the pole tooth and the polar tooth fixing fitting hole is What is necessary is just to make it have a shape which can deform | transform so that it may become a strong fitting state which can prevent the movement to the lamination direction of the end of a tooth | gear. If it does in this way, a pole tooth connection block and a yoke block can be combined stably.

  The pole tooth connection block can be disposed on each of a pair of side surfaces extending in the longitudinal direction of the yoke block and facing each other. In this way, the thrust of the mover can be increased.

  According to the present invention, since the cooling pipes are laid in the plurality of slots so that the excitation windings are sandwiched therebetween, the pole teeth and the excitation windings can be efficiently cooled.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of the linear motor of this example, and FIG. 2 is an exploded perspective view of a linear motor armature 11 used in the linear motor of FIG. As shown in FIG. 1, the linear motor of this example includes a stator 1 and a mover 3 that is movably supported by the stator 1 by support means (not shown). The stator 1 has a structure including a magnetic pole array 7 on a base 5. The magnetic pole array 7 is configured such that a plurality of N-pole permanent magnets 7a... And a plurality of S-pole permanent magnets 7b.

  As shown in FIG. 2, the mover 3 has a structure in which a linear motor armature 11 is fixed to a rectangular flat stage member 9. In FIG. 1, the mover 3 is shown with the stage member 9 omitted for easy understanding. The linear motor armature 11 includes a core 13 (shown in an exploded state in FIG. 2), three excitation windings 15, a cooling pipe 17, and a plurality of wedges 19. Have. The core 13 is configured by combining a yoke block 21 and a pole tooth coupling block 23 that constitute a yoke.

  As shown in FIG. 3, the yoke block 21 includes three elongated yoke constituent segments 25 </ b> A to 25 </ b> C and two elongated attachment segments 27 that are alternately stacked in the thickness direction. Each of the yoke constituent segments 25A to 25C is configured by laminating a plurality of steel plates 29. In this example, the yoke-constituting segment 25B disposed in the middle is configured by laminating a larger number of steel plates 29 than the yoke-constituting segments 25A, 25C disposed on both sides. The structure is the same except for the thickness dimension in the stacking direction. The yoke constituent segments 25A to 25C include seven pole tooth fixing fitting hole constituent portions 25a that open in both directions in the stacking direction of the steel plates 29 and in the direction toward the pole teeth 39, respectively. Each is formed at intervals in the longitudinal direction. In other words, protrusions 25b projecting toward the pole tooth connection block 23 are formed at both ends of each of the yoke constituent segments 25A to 25C, and between the adjacent pole tooth fixing fitting hole constituent parts 25a and 25a. Are formed with protrusions 25c and 25d protruding toward the pole tooth connection block 23 side. The pole tooth fixing fitting hole constituting portion 25a has a trapezoidal shape in which a slight gap is formed between the engaging portion 39c and the engaging portion 39c of the pole tooth 39 which will be described later. ing.

  The protrusions between the adjacent pole tooth fixing fitting hole constituting parts 25a, 25a are composed of four protrusions 25c in which a wedge press fitting fitting hole constituting part 25e is formed, and a wedge press fitting fitting hole constituting part. It is comprised from the two protrusions 25d in which 25e is not formed. The protrusion 25c in which the wedge press-fitting fitting hole constituting part 25e is formed is such that the protrusion 25d in which the wedge press-fitting fitting hole constituting part 25e is not formed and the protrusions 25b on both ends are adjacent to at least one side. positioned. In other words, each protrusion is formed on at least one side of the pole tooth fixing fitting hole constituting portion 25a so that the protrusion 25c in which the wedge press fitting fitting hole constituting portion 25e is formed is located. . The wedge press-fitting fitting hole constituting portion 25e has a rectangular shape that opens in both directions in the laminating direction of the steel plates 29 and in a direction toward a slot 43 described later, as shown in FIG. The press-fitted portion 25f into which the wedge 19 is press-fitted, and the cross-sectional shape in the stacking direction is smaller than that of the press-fitted portion 25f, and the press-fitted portion 25f and the slot 43 are formed to communicate with each other. And 25 g of a small cross section that expands when the is pressed. More specifically, the wedge press-fitting fitting hole 25e has a shape that allows the wedge 19 to be pressed from the opening located in the stacking direction, but prevents the wedge 19 from dropping from the opening toward the slot 43. is doing.

  The attachment segment 27 is formed of a metal plate that is thicker than the steel plate 29 and can be cut, and both directions in the stacking direction of the yoke constituent segments 25A to 25C and the attachment segment 27 and the direction toward the pole tooth connection block 23. Have seven openings 27a. In other words, eight protrusions 27c and 27b are formed between the both ends of the attachment segment 27 and between the adjacent openings 27a and 27a. The opening 27a has a rectangular shape larger than the engaging portion 39c of the pole tooth 39, and is formed at a position corresponding to the pole tooth fixing fitting hole constituting portion 25a of the yoke constituting segments 25A to 25C. Each opening portion 27a has seven pole tooth fixing fitting holes shown in FIG. 2 together with the pole tooth fixing fitting hole constituent portions 25a in a state where the yoke constituent segments 25A to 25C and the mounting segment 27 are laminated. 31...

  The protrusions 27b,..., 27c have a rectangular cross section, and are formed at positions corresponding to the protrusions 25b to 25d of the yoke constituting segments 25A to 25C. Among these protrusions, the protrusions 27b corresponding to the protrusions 25c of the yoke constituent segments 25A to 25C are respectively formed with through holes 27d having a circular cross section. Each through hole 27d has four wedge press-fit fitting holes 33 shown in FIG. 2 together with the wedge press-fit fitting hole constituting portion 25e in a state where the yoke constituting segments 25A to 25C and the attachment segment 27 are laminated. It is composed. Each of the attachment segments 27 is formed with three holes 27e that are open to the stage member 9 and are threaded on the inside. Six screws 35 are screwed into these holes 27 e through the through holes 9 a of the stage member 9, and the stage member 9 is fixed to the armature 11.

  As shown in FIG. 2, the pole tooth connection block 23 is configured by laminating a plurality of steel plates 37, and has seven pole teeth 39 and bridge portions 41 that connect the pole teeth 39 to each other. And. As a result, six slots 43 are formed between the adjacent pole teeth 39.

  The pole teeth 39 are arranged along the longitudinal direction of the yoke block 21, and are formed at one end located on the opposite side of the substantially rectangular parallelepiped base 39a, the magnetic pole surface 39b facing the stator 1, and the magnetic pole surface 39b. Engaging portion 39c. A plurality of exciting windings 15 each having a winding conductor wound around every other pole teeth 39 are attached to the seven pole teeth 39. Accordingly, a part of the excitation winding 15 is disposed in each of the six slots 43..., And the pole teeth 39 are excited by these excitation windings 15. Further, around the pole teeth 39 to which the excitation windings 15 are attached, a part of the cooling pipe 17 is disposed so as to sandwich the excitation windings 15 between the bridge portions 41. Thus, the pole teeth 39 are cooled by the cooling pipes 17 laid in the six slots 43.

  The engaging portion 39c has a trapezoidal shape in which the cross-sectional shape in the direction orthogonal to the laminating direction of the steel plates 37 ... gradually decreases in the width dimension along the longitudinal direction of the yoke block 21 toward the magnetic pole surface 39b side. And are fitted into the pole tooth fixing fitting holes 31 of the yoke block 21. As described above, the pole tooth fixing fitting hole constituting portion 25a of the yoke block 21 has a shape in which a slight gap is formed between the engaging portion 39c and the engaging portion 39c when the engaging portion 39c is fitted. Have. In other words, the pole teeth fixing fitting holes 31 allow loose insertion of the engaging portions 39c of the pole teeth 39 from the openings located in the stacking direction, but from the openings toward the pole teeth 39 side. It has a dimension that prevents the engaging portion 39c of the pole teeth 39 from falling off. Therefore, the engaging portion 39c is loosely inserted from the opening located in the laminating direction of the steel plates 37 of the pole tooth fixing fitting holes 31 and held in the pole tooth fixing fitting holes 31.

  The wedge 19 has a substantially rectangular cross-sectional shape, and has an elongated shape in which the cross-sectional area increases from one end portion (tip portion) 19a to the other end portion (rear end portion). Yes. The wedge 19 has a size that allows the tip 19a to be press-fitted into the press-fit portion 25f of each wedge press-fit fitting hole 33 from the openings on both sides in the stacking direction of the steel plates 29.

  Next, a method for assembling the armature 11 will be described. First, after the exciting winding 15 is attached to every other predetermined pole teeth 39 of the pole tooth connecting block 23, the cooling pipe 17 is arranged. The excitation winding 15 may be attached by fitting the already-excited excitation winding to the pole teeth 39 or may be attached by winding directly on the pole teeth 39. Next, as shown in FIG. 4A, the engaging portions 39c of the pole tooth connecting block 23 are inserted into the pole tooth fixing fitting holes 31 from one opening portion in the stacking direction of the steel plates 29. Next, as shown in FIG. 4B, the two wedges 19 are press-fitted from the ends 19a into the press-fit portions 25f of the respective wedge press-fit fitting holes 33 from the openings on both sides in the stacking direction of the steel plates 29. To do. As a result, the pair of wall portions 25 h around the press-fit portion 25 f are expanded by the two wedges 19 in the direction in which the small cross-section portion 25 g expands. Accordingly, the pole tooth fixing fitting hole 31 adjacent to the wedge press fitting fitting hole 33 is deformed, and the engagement portion 39c of the pole tooth 39 is prevented from moving in the stacking direction of the steel plates 29. According to this example, by increasing the pressure input of the wedge 19 into the wedge press-fitting fitting hole 33, the pole teeth 39 and the yoke block 21 can be brought into close contact with each other, and the magnetic resistance between them can be reduced. Can be lowered. Further, since the pole teeth 39 and the yoke block 21 can be coupled simply by press-fitting the wedge 19 into the wedge press-fitting fitting hole 33, the coupling between both can be performed easily.

  In the above example, the press-fit portion 25f has a substantially rectangular cross-sectional shape in a direction orthogonal to the stacking direction of the steel plates 29, but a press-fit portion having a cross-sectional shape of another shape is adopted. Of course you can. For example, as shown in FIG. 5, the cross-sectional shape of the press-fit portion 125f can be made substantially circular. In this case, the shape of the press-fit portion 125f is formed in a truncated cone shape having a cross-sectional area that increases from one end portion toward the other end portion, and the wedge 119 is formed from one end portion (tip portion) to the other end. It forms in a truncated cone shape in which the cross-sectional area increases toward the part (rear end part). When the wedge 119 is press-fitted into the press-fitted portion 125f of the wedge press-fitting fitting hole disposed adjacent to the pole tooth fixing fitting hole 131, the engaging portion 139c of the pole tooth 139 and the polar tooth are inserted. What is necessary is just to form in the shape which can deform | transform so that a fitting state with the fitting hole 131 for fixation may become a strong fitting state which can prevent the movement to the lamination direction of the engaging part 139c of the pole tooth 139.

  In the above example, the longitudinal direction of the pole teeth 39 and the longitudinal direction of the yoke block 21 are orthogonal to each other. However, as shown in FIG. 6, the longitudinal direction of the pole teeth 239 and the longitudinal direction of the yoke block 221 are both The armature 211 can be configured to be inclined (skewed) at a predetermined angle without being orthogonal. If the armature 211 is configured in this manner, the cogging torque can be reduced.

  FIG. 7 is a side view of a linear motor according to another embodiment of the present invention, and FIG. 8 is a bottom view of an armature 311 for linear motor used in the linear motor of FIG. In FIG. 7, for easy understanding, the excitation winding 315 and the cooling pipe 317 are shown in cross section, and in FIG. 8, they are drawn excluding the bridge portion of the pole tooth connection block 323. In the linear motor of this example, a pair of pole teeth 339 and 339 located at both ends in the longitudinal direction of the pole tooth connection block 323 are provided with two extension pole tooth blocks 345 that extend the pair of pole teeth in the longitudinal direction. They are joined together side by side. In this example, the number of pole teeth 339 is 13, and in order to enhance the cooling effect, the cooling pipe 317 is arranged so as to sandwich the excitation winding 315 in the vertical direction. The linear motor and the linear motor armature 311 in this example are the linear motors shown in FIGS. 1 to 3 except for the number of pole teeth, the arrangement of the cooling pipe 317, and the portion where the extension pole tooth blocks are coupled. Since it has the same structure as the motor and linear motor armature 11, the other parts are denoted by reference numerals obtained by adding 300 to the reference numerals given in FIGS. 1 to 3 and the description thereof is omitted.

  As shown in the perspective view of FIG. 9, one extension pole tooth block 345 is formed by laminating a plurality of steel plates 347, and the magnetic pole surface 345a includes a triangular plane portion 345b, first and first 2 inclined surface portions 345c and 345d. The flat portion 345b is continuous with the magnetic pole surfaces 339b, 339b of the pair of pole tooth halves 339, 339 and extends toward the front side in the longitudinal direction of the yoke block 321. The first and second inclined surface portions 345c and 345d are continuous with the two sides of the triangular plane portion 345b and are inclined so as to approach the side where the yoke block 321 is located toward the front side in the longitudinal direction of the yoke block 321. is doing. Further, the boundary line 345e between the first and second inclined surface portions 345c and 345d is also inclined so as to approach the side where the yoke block 321 is located toward the front side in the longitudinal direction of the yoke block 321. An engaging portion 345f is formed at the end of the extension pole tooth block 345 opposite to the magnetic pole surface 345a. The engaging portion 345f of the extension pole tooth block 345 has a trapezoidal shape by combining with the engaging portion 339c of the pole tooth half 339, and together with the engaging portion 339c of the pole tooth half 339. The yoke block 321 is fitted in the pole tooth fixing fitting holes 331 at both ends. Further, on the surface of the extension pole tooth block 345 facing the pole tooth connection block 323, recesses 345g that are open on both sides orthogonal to the longitudinal direction of the yoke block 321 and on the pole tooth connection block 323 side are formed. The pole tooth connection block 323 is formed with a protrusion 323b that fits into the recess 345g. The projecting portion 323b has a trapezoidal shape that can prevent the recess 345g from coming off, and the extension pole tooth block 345 is fixed to the pole tooth connecting block 323 by this fitting. When the extension pole tooth block 345 is attached in this way, the togging torque can be further reduced.

  FIG. 10 is a side view of a linear motor according to another embodiment of the present invention. In FIG. 10, for easy understanding, the excitation winding 415 and the cooling pipe 417 are shown in cross section. In the linear motor of this example, a pole tooth connection block 423 is configured by connecting a plurality (two in this example) of pole tooth connection block units 423A and 423B using a fitting structure. A concave portion 451a and a protruding portion 451b are formed in the pole tooth half 451 located on the pole tooth connecting block unit 423B side of the pole tooth connecting block unit 423A. The pole tooth half 455 located on the pole tooth connection block unit 423A side of the pole tooth connection block unit 423B is formed with a recess 455a that fits the protrusion 451b and a protrusion 455b that fits the recess 451a. ing. Each of the protrusions 451b and 455b has a trapezoidal shape that can prevent the protrusions 451a and 451a from coming out of the recesses 455a and 451a, and the pole tooth connection block units 423A and 423B are coupled to each other by this fitting structure.

  A concave portion 453a and a protruding portion 453b are formed in the pole tooth half 453 located on the one extension pole tooth block 445A side of the pole tooth connecting block unit 423A. The pole tooth half 457 located on the pole tooth connection block unit 423A side of one extension pole tooth block 445A is formed with a recess 457a for fitting the protrusion 453b and a recess 457b facing the recess 453a. Yes. The protrusion 453b has a trapezoidal shape that can prevent the protrusion 453b from coming off from the recess 457a. Between the concave portion 453a of the pole tooth connection block unit 423A and the concave portion 457b of the extension pole tooth block 445A, a rectangular retaining member 459 having two constrictions that can be prevented from coming out of both concave portions is disposed. By this fitting structure, the pole tooth connection block unit 423A and one extension pole tooth block 445A are coupled.

  A concave portion 461a and a protruding portion 461b are formed in the pole tooth half 461 located on the other extension pole tooth block 445B side of the pole tooth connecting block unit 423B. The pole tooth half 463 located on the pole tooth connection block unit 423B side of the other extension pole tooth block 445B is formed with a recess 463a for fitting the protrusion 461b and a recess 463b facing the recess 461a. Yes. The protrusion 461b has a trapezoidal shape that can prevent the protrusion 461b from coming off from the recess 463a. Between the recesses 461a and 463b, a rectangular retaining member 465 having two constrictions that can prevent the recesses from coming out from both recesses is disposed. By this fitting structure, the pole tooth connection block unit 423B and the other extension pole tooth block 445B are coupled.

  One pole tooth is constituted by pole tooth halves 451 and 455 constituting the coupling part of two adjacent pole tooth connecting block units 423A and 423B, and this pole tooth engaging part 467 is formed on the yoke block 421. It is fitted in one pole tooth fixing fitting hole 431. In addition, one pole tooth is constituted by the pole tooth halves 453 and 457 constituting the coupling part between the adjacent pole tooth connecting block unit 423A and one extension pole tooth block 445A, and this pole tooth is engaged. Similarly to the engaging portion 467, the portion 469 is fitted in one pole tooth fixing fitting hole 431 of the yoke block 421. In addition, one pole tooth is constituted by pole tooth halves 461 and 463 that constitute a connecting portion between the adjacent pole tooth connecting block unit 423B and the other extension pole tooth block 445B. Similarly to the engaging portion 467, the portion 471 is also fitted in one pole tooth fixing fitting hole 431 of the yoke block 421. By these fittings, the two pole tooth connection block units 423A and 423B, the two extension pole tooth blocks 445A and 445B, and the yoke block 421 are coupled.

  11 is a plan view of a linear motor according to still another embodiment of the present invention, FIG. 12 is a side view of an armature 511 for linear motor used in the linear motor of FIG. 11, and FIG. 11 is a sectional view taken along line XIII-XIII. In FIG. 11, for easy understanding, the excitation winding 515 and the cooling pipe 517 are shown in cross section, and the first side surface block member 571 shown in FIG. 13 is omitted. Moreover, in FIG. 12, it has drawn except the bridging part of the pole tooth connection block 523. In the linear motor armature 511 of the linear motor of this example, pole tooth connection blocks 523A and 523B are arranged on both sides of the yoke block 521, respectively. On both sides of the yoke block 521, there are formed pole tooth fixing fitting holes 531... And wedge press fitting fitting holes 533. The engaging portions 539c of the pole tooth coupling blocks 523A and 523B are engaged with the pole tooth fixing fitting holes 531 and the wedge 519 is press-fitted into the wedge press fitting fitting holes 533 to connect the yoke block 521 with the pole teeth. Blocks 523A and 523B are combined.

  Extending pole tooth blocks 545 are coupled to both ends of the pole tooth connecting blocks 523A and 523B in the longitudinal direction. Further, 20 screw through holes 513a... Are formed in the pole tooth connection blocks 523A and 523B, the extension pole tooth block 545, and the yoke block 521 constituting the core 513 at a predetermined interval. The pole tooth connection blocks 523A and 523B and the extension pole tooth block 545 basically have the same structure as the pole tooth connection block shown in FIG.

  In the linear motor of this example, the stator is composed of a pair of stator constituent bodies 501A and 501B. Each stator structure 501A, 501B is configured by arranging a magnetic pole array in which a plurality of N-pole permanent magnets 507a and a plurality of S-pole permanent magnets 507b are alternately arranged on a base 505. The bodies 501A and 501B are respectively attached to a pair of opposing wall portions of the concave portion 577a of the base 577 so that the magnetic pole rows face each other.

  As illustrated in FIG. 13, the mover 503 includes a linear motor armature 511, first and second side surface block members 571, 573, and a support member 579. As shown in FIGS. 13 and 14, the first side surface block member 571 has a plate shape having a rectangular outline. 14 is a perspective view of the first side block member 571 as viewed from the side of the linear motor armature 511 in FIG. 13 (downward toward the plane of FIG. 13). As shown in the figure, the first side surface block member 571 is disposed between the respective concave portions 571a so as to correspond to the twelve rectangular bottomed concave portions 571a ... and the screw through holes 513a ... of the core 513. 20 screw through holes 571b... In the recess 571a, there are disposed a part of the excitation winding 515 and the cooling pipe 517 protruding upward from the pole tooth connection blocks 523A and 523B and the yoke block 521. The surface 571c of the first side surface block member 571 facing the linear motor armature 511 is in contact with the pole tooth connection blocks 523A and 523B and the yoke block 521.

  As shown in FIGS. 13 and 15, the second side surface block member 573 has a plate shape having a rectangular outline with a smaller width dimension than the first side surface block member 571. 15 is a perspective view of the second side block member 573 as viewed from the side of the linear motor armature 511 in FIG. 13 (upward as viewed in FIG. 13). As shown in this figure, the second side surface block member 573 includes seven spacer members 573a that contact the pole tooth connection block 523A, seven spacer members 573b that contact the pole tooth connection block 523B, and a yoke block. And a single elongated spacer member 573c in contact with 521. The gap between the two adjacent spacer members 573a and the yoke block 521 and the gap between the two adjacent spacer members 573b and the yoke block 521 are below the pole tooth connection blocks 523A and 523B and the yoke block 521. A part of the exciting winding 515 and the cooling pipe 517 protruding in the above are arranged. Further, 20 screw holes 573d are formed in the spacer members 573a to 573c of the second side surface block member 573 so as to correspond to the screw through holes 571a of the first side surface block member 571. The core 513 is formed by a screw member 575 that passes through the screw through holes 571b of the first side surface block member 571 and the screw through holes 513a of the core 513 and is screwed into the screw holes 573d of the second side surface block member 573. The first and second side surface block members 571 and 573 are fixed.

  The support member 579 is provided at an edge portion on the surface 571c of the second side surface block member 573 facing the linear motor armature 511, and the support body 579a and the rotating body provided rotatably on the support body 579a. 579b.

  In the mover 503, the magnetic pole surfaces 539b of the magnetic poles of the two pole tooth connection blocks 523A and 523B and the magnetic pole rows of the pair of stator components 501A and 501B are opposed to each other, and the rotating body 579b of the support 579a is the base. It is movably disposed on the base 577 so as to be placed on the placing surface 577 b of 577. As a result, the mover 503 is movably supported by the pair of stator components 501A and 501B constituting the stator.

It is a perspective view of the linear motor of one embodiment of the present invention. It is a disassembled perspective view of the armature for linear motors used for the linear motor of FIG. It is a disassembled perspective view of the yoke block of the armature for linear motors of FIG. (A) And (B) is a figure used for description of the assembly method of the armature for linear motors. It is sectional drawing of the core of the armature for linear motors of other embodiment of this invention. It is a top view of the linear motor of other embodiments of the present invention. It is a side view of the linear motor of other embodiment of this invention. It is a bottom view of the armature for linear motors used for the linear motor of FIG. It is a perspective view of the extension pole tooth block used for the linear motor of FIG. It is a side view of the linear motor of other embodiment of this invention. It is a top view of the linear motor of other embodiment of this invention. It is a side view of the armature for linear motors used for the linear motor of FIG. It is XIII-XIII sectional drawing of FIG. It is a perspective view of the 1st side block member used for the linear motor of FIG. It is a perspective view of the 2nd side block member used for the linear motor of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 3 Movable element 5 Base 7 Magnetic pole row 9 Stage member 11 Linear motor armature 13 Core 15 Excitation winding 19 Wedge 21 York block 23 Polar tooth connection block 25f Press-fit part 25g Small cross section 31 Polar tooth fixing fitting Joint hole 33 Fitting hole for wedge press-fitting 39 Polar teeth 41 Bridge part

Claims (4)

A plurality of steel plates, each comprising a yoke extending linearly in a direction orthogonal to the stacking direction of the steel plates, and a plurality of pole teeth arranged along the longitudinal direction of the yoke, the plurality of pole teeth Are arranged at intervals in the longitudinal direction so as to form a slot between the two adjacent pole teeth, and one end of the plurality of pole teeth opposite to the magnetic pole face is coupled to the yoke. Core
A linear motor armature having a plurality of exciting windings that are partially disposed in a plurality of slots of the core and that excite the plurality of pole teeth;
A linear motor armature in which cooling piping is laid in the plurality of slots so as to sandwich the exciting winding therebetween. The yoke is composed of a yoke block formed separately from the pole teeth,
In the engaged portion to which the plurality of pole teeth of the yoke block are coupled, there are a plurality of pole tooth fixing fitting holes that open in both directions in the laminating direction of the steel plates and in the direction toward the pole teeth, respectively. It is formed at intervals in the longitudinal direction,
In the engaged portion of the yoke block, there are formed a plurality of wedge press-fitting fitting holes that open in both directions in the laminating direction of the steel plates and in the direction toward the slot,
The wedge press-fitting fitting hole has a shape that allows the wedge to be press-fitted from the opening located in the stacking direction, but prevents the wedge from dropping from the opening toward the slot,
The pole tooth fixing fitting hole allows loose insertion of the pole tooth from the opening located in the stacking direction, but prevents the pole tooth from dropping from the opening toward the pole tooth side. Have
One or two pole tooth fixing fitting holes adjacent to the wedge press-fitting fitting hole are formed when the wedge is press-fitted into the wedge press-fitting fitting hole disposed adjacent to the wedge press-fitting fitting hole. The linear motor electrical machine according to claim 1, wherein the linear motor electric machine has a shape that can be deformed so that a fitting state between the one end of the tooth and the fitting hole for fixing the pole teeth is a strong fitting state. Child. The core includes a monolithic pole tooth connection block having a structure in which the plurality of pole teeth are connected to each other by a bridging portion that substantially closes the openings on the magnetic pole surface side of the plurality of slots; It is composed of a yoke block formed separately from the tooth connection block,
In the engaged portion to which the plurality of pole teeth of the yoke block are coupled, there are a plurality of pole tooth fixing fitting holes that open in both directions in the laminating direction of the steel plates and in the direction toward the pole teeth, respectively. It is formed at intervals in the longitudinal direction,
In the engaged portion of the yoke block, there are formed a plurality of wedge press-fitting fitting holes that open in both directions in the laminating direction of the steel plates and in the direction toward the slot,
The wedge press-fitting fitting hole has a shape that allows the wedge to be press-fitted from the opening located in the stacking direction, but prevents the wedge from dropping from the opening toward the slot,
The pole tooth fixing fitting hole allows loose insertion of the pole tooth from the opening located in the stacking direction, but prevents the pole tooth from dropping from the opening toward the pole tooth side. Have
One or two pole tooth fixing fitting holes adjacent to the wedge press-fitting fitting hole are formed when the wedge is press-fitted into the wedge press-fitting fitting hole disposed adjacent to the wedge press-fitting fitting hole. A shape that can be deformed so that the fitting state of the one end of the tooth and the fitting hole for fixing the pole tooth is a strong fitting state that can prevent the one end of the pole tooth from moving in the stacking direction. The armature for a linear motor according to claim 1, wherein the armature is provided. The core includes two pole teeth connecting blocks having a single structure having a structure in which the plurality of pole teeth are connected to each other by a bridge portion that substantially closes the openings on the magnetic pole surface side of the plurality of slots; A yoke block formed separately from the two pole tooth connection blocks, extending along the longitudinal direction and having the two pole tooth connection blocks fixed to a pair of opposing side surface parts;
A plurality of pole teeth fixed to the engaged portion to which the plurality of pole teeth of the pair of side surface portions of the yoke block are coupled are opened in both directions in the laminating direction of the steel plate and in a direction toward the pole teeth. Fitting holes are formed at intervals in the longitudinal direction,
In the engaged portion of the yoke block, there are formed a plurality of wedge press-fitting fitting holes that open in both directions in the laminating direction of the steel plates and in the direction toward the slot,
The wedge press-fitting fitting hole has a shape that allows the wedge to be press-fitted from the opening located in the stacking direction, but prevents the wedge from dropping from the opening toward the slot,
The pole tooth fixing fitting hole allows loose insertion of the pole tooth from the opening located in the stacking direction, but prevents the pole tooth from dropping from the opening toward the pole tooth side. Have
One or two pole tooth fixing fitting holes adjacent to the wedge press-fitting fitting hole are formed when the wedge is press-fitted into the wedge press-fitting fitting hole disposed adjacent to the wedge press-fitting fitting hole. A shape that can be deformed so that the fitting state of the one end of the tooth and the fitting hole for fixing the pole tooth is a strong fitting state that can prevent the one end of the pole tooth from moving in the stacking direction. The armature for a linear motor according to claim 1, wherein the armature is provided.

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