JP2002359962A - Cylinder-type linear synchronous motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder-type linear synchronous motor which can obtain large thrust. SOLUTION: Four permanent magnet rows 9-15 are fixed to a magnet fixing part 7 fixed to a direct acting shaft 5, thereby constituting a movable unit 1. A stator core unit 17 is constituted, by combining a plurality of stator core divided bodies 19a-19g. Annular windings 25a-25f, formed by winding an annularly wound conductor so as to surround the periphery of the movable unit 1, are used as an excitation winding. A part of the annular windings 25a-25e is fitted in a slot formed between two adjacent magnetic pole parts 17c in the axial direction of a plurality of the stator core units 17. A magnetic jointing body 29 is arranged in a space 27, formed between adjacent end surfaces of two adjacent stator units 17. Four magnetically jointing bodies 29 are fixed to two adjacent stator core units 17 by using a mechanical jointing means 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder type linear synchronous motor in which a mover moves linearly.

[0002]

2. Description of the Related Art In a conventional cylinder type linear motor according to the prior application of the applicant shown in Japanese Patent Application Laid-Open Nos. 11-332211 and 2000-262034, etc. It has four permanent magnet rows each including a moving shaft, a magnet mounting portion fixed to the linear moving shaft, and a plurality of permanent magnets fixed to the magnet mounting portion and arranged in the axial direction of the linear moving shaft. Further, the stator is formed by winding a winding conductor in a ring shape, and is arranged at a predetermined interval in the axial direction and is arranged around a periphery of the mover. A slot having a plurality of magnetic pole portions opposed to the magnet row with a predetermined gap therebetween and a yoke for magnetically connecting the plurality of magnetic pole portions, and receiving a part of the annular winding corresponding to a space between two adjacent magnetic pole portions; , Four stator core units in which a plurality of magnetic pole portions are arranged at intervals in the axial direction. In particular, JP-A-11-33
The magnet mounting portion of the conventional mover shown in FIG. 7 of Japanese Patent No. 2211 has a quadrangular prism shape having four side surfaces. Each of the plurality of permanent magnets is formed of a plate-like permanent magnet that can be mounted on a side surface, and four permanent magnet rows are formed and arranged on four side surfaces, respectively. In a so-called square cylinder type linear motor like this example,
The gap between the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit and the magnetic pole surfaces of the plurality of flat permanent magnets forming the corresponding permanent magnet row is substantially constant. Also, Japanese Patent Application Laid-Open
Japanese Patent Application Publication No. 0-262034 discloses that four stator core units are axially combined with a plurality of stator core divided bodies each having a combination structure portion that can be axially combined with a yoke portion corresponding to a slot. A technology constituted by the above is disclosed.

[0003]

However, in the above-described conventional cylinder type linear synchronous motor, two adjacent linear synchronous motors are required.
Since a space is formed between the end faces of the two stator core units, the leakage magnetic flux leaking from the end faces of the stator core unit increases, which causes a reduction in thrust.

An object of the present invention is to reduce magnetic flux leakage from an end face of a stator core unit and to completely close the entire stator core by using four magnetic coupling bodies for magnetically coupling between stator core units. An object of the present invention is to provide a cylinder-type linear synchronous motor capable of designing a winding space as large as possible by forming a magnetic circuit and obtaining a large thrust.

Another object of the present invention is to provide a more compact cylinder type linear synchronous motor.

It is still another object of the present invention to provide a cylinder type linear synchronous motor having a stator having a structure that is easy to assemble.

[0007]

The mover used in the cylinder type linear synchronous motor of the present invention includes a linear motion shaft reciprocating in the axial direction, a magnet mounting portion fixed to the linear motion shaft, and a magnet mounting portion fixed to the magnet mounting portion. And four permanent magnet rows composed of a plurality of permanent magnets arranged in the axial direction of the linear motion shaft. The plurality of permanent magnets constituting one permanent magnet row may be a plurality of physically combined permanent magnets, or physically one magnetic body alternately has N poles and S poles in the longitudinal direction. A plurality of permanent magnets configured to be magnetized may be used.

The stator has a plurality of annular windings and a plurality of movable winding conductors formed by winding a winding conductor in an annular shape, arranged at predetermined intervals in an axial direction, and arranged to surround the periphery of the movable element. A part of an annular winding having a plurality of magnetic pole portions opposing a permanent magnet row of a child through a predetermined gap and a yoke for magnetically connecting the plurality of magnetic pole portions and corresponding between two adjacent magnetic pole portions; A plurality of magnetic pole parts are provided at a distance in the axial direction so as to form a slot for receiving a stator core unit. This magnet mounting part is 4
It has a quadrangular prism shape having two side surfaces, and a plurality of permanent magnets are formed of flat permanent magnets that can be mounted on the side surfaces, respectively, and four permanent magnet rows are formed on the four side surfaces, respectively. The four stator core units are configured by axially combining a plurality of stator core divisions having a combination structure that can be axially combined with a portion of the yoke corresponding to the slot. The gaps between the magnetic pole surfaces of the plurality of magnetic pole portions and the magnetic pole surfaces of the plurality of flat permanent magnets forming the corresponding permanent magnet row are substantially constant. When the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit are configured to be substantially flat, and a plate-shaped magnet is used as the plurality of permanent magnets that form the permanent magnet row attached to the magnet mounting portion of the magnet mounting body. In addition, the pole face of the permanent magnet becomes flat, and the gap size between the pole faces of the plurality of magnetic pole portions becomes substantially constant. Since there is no substantial change in the dimension of the gap between the magnetic pole surface of the stator and the magnetic pole surface of the mover, the largest thrust can be obtained magnetically, and a torque that rotates the linear motion shaft is generated. Can be prevented. As the structure of the combination structure portion that can be combined in the axial direction, a structure combined with a concave-convex fitting structure, and a concave portion or a slit facing each of the yoke components of the two stator core divided bodies are formed,
A known combination structure, such as a structure in which a common fitting member is fitted to both of two opposed concave portions or slits and combined, can be used.

According to the present invention, a part of each of the plurality of annular windings arranged to fill a space formed between adjacent end faces of two adjacent stator core units and located in the space is provided. And four magnetic connectors for magnetically connecting two adjacent stator core units with a plurality of slots arranged in the axial direction so as to be received. When the magnetic coupling body is arranged in the space formed between the adjacent end faces of the two adjacent stator core units as in the present invention, the magnetic path area is substantially increased. The design can be made as large as possible, and a large thrust can be obtained.

[0010] Since the four magnetic coupling bodies used in the present invention are formed integrally with each other, it is possible to magnetically connect the stator core units easily with a small number of parts.

The four magnetic coupling bodies used in the present invention are:
A plurality of magnetic coupling segments that can be respectively combined in the axial direction may be combined in the axial direction. In this case, when assembling the stator core unit, the magnetic coupling divided bodies can be combined together with the stator core divided bodies, and the assembling work is facilitated. In this way, when manufacturing linear motors having different lengths in the axial direction, the number of magnetic coupling divided bodies can be increased without manufacturing a dedicated magnetic coupling body, so that a magnetic coupling body having an arbitrary length can be obtained. Therefore, it is possible to sufficiently cope with high-mix low-volume production.

The method of mechanically connecting the four magnetic connectors to the stator core unit is optional. If no case is used outside the core, mechanical coupling means for mechanically coupling the four magnetic coupling bodies to the two corresponding stator core units may be further provided. The mechanical coupling means is inserted into, for example, a plurality of through holes formed in the magnetic coupling body, a plurality of fixing holes formed in the stator core unit, a plurality of through holes and the plurality of fixing holes. And a plurality of screw members. By using such a connecting means, the magnetic connector can be firmly fixed with a simple structure in the space formed between the adjacent end faces of the two stator core units.

When four flat permanent magnets arranged in the circumferential direction of the magnet mounting portion and having the same polarity on the magnetic pole surface are brought into contact with other flat permanent magnets adjacent in the circumferential direction,
The area of the magnetic pole surface of the permanent magnet on the mover side facing the magnetic pole surface of the magnetic pole portion of the stator can be maximized, and the thrust can be further increased.

Further, the plurality of stator core divisions constituting the stator core unit used in the present invention each have one magnetic pole portion, and each of the plurality of stator core divisions is arranged in a direction orthogonal to the direction in which the plurality of stator core divisions are arranged. It is configured by laminating a plurality of steel plates. The plurality of stator core splits are formed with slits that open toward the magnetic pole surface of the magnetic pole portion and two side surfaces of the magnetic pole portion located on both sides in the stacking direction of the plurality of steel plates. At this time, among the plurality of stator core divided bodies constituting the four stator core units,
The four stator core divisions arranged in the circumferential direction are formed by fitting an annular stationary plate made of a magnetic material arranged so as to surround the mover into four slits formed in the four stator core divisions. The positional relationship is fixed. When the present invention is applied to a cylinder type linear synchronous motor (frameless type motor) in which the yoke of the stator core unit is exposed, the positional relationship between the stator core divided bodies is fixed. In addition to being easy, the shape of the stator core unit can be prevented from being distorted by the magnetic attraction of the permanent magnet acting on the magnetic pole surface of the magnetic pole portion of the stator core unit.

In the case where an annular fixing plate is fitted into a slit formed in the stator core divided body, a plurality of annular fixing plates into which a part of the plurality of annular fixing plates is fitted are also fitted to the four magnetic coupling bodies. Is formed. In this way, even when the annular fixing plate is used, there is no problem in mounting the magnetic coupling body, and the magnetic coupling body can be positioned by using a part of the annular fixing plate, so that assembly is possible. It will be easier.

In the case where a magnetic coupling body is formed using the above-described magnetic coupling divisions, a slit into which a part of the plurality of annular fixing plates is fitted may be formed in each of the magnetic coupling divisions. .

The concept of the present invention is not limited to the case where the number of the stator core units is four, but is generally two or more.
This is applicable when using n (n is an integer of 2 or more) stator core units. Specifically, a linear motion shaft reciprocating in the axial direction, a magnet mounting portion fixed to the linear motion shaft, and a plurality of permanent magnets fixed to the magnet mounting portion and composed of a plurality of permanent magnets arranged in the axial direction of the linear motion shaft (n Is a natural element having a permanent magnet row of 2 or more), and a winding conductor is formed by being wound in a ring shape, is arranged at a predetermined interval in the axial direction, and surrounds the circumference of the movable element. A plurality of annular windings and a plurality of magnetic pole portions opposing a permanent magnet row of the mover via a predetermined gap, and two adjacent magnetic pole portions having a yoke for magnetically connecting the plurality of magnetic pole portions. A stator comprising 2n stator core units in which a plurality of magnetic pole portions are axially spaced so as to form a slot for receiving a portion of the corresponding annular winding therebetween. The magnet mounting portion has a prism shape having 2n side surfaces. A plurality of permanent magnets are each formed of a plate-like permanent magnet that can be mounted on a side surface, and 2n permanent magnet rows are formed on 2n side surfaces, respectively. The stator core unit is configured by axially combining a plurality of stator core divided bodies having a combination structure that can be axially combined with a portion of the yoke corresponding to the slot, and a plurality of magnetic poles of the fixed core unit. It is also applicable to a cylinder type linear synchronous motor in which the gap between the pole face of the portion and the pole faces of the plurality of flat permanent magnets forming the corresponding permanent magnet row is substantially constant. . That is, the present invention can be applied to not only a square shape in which the magnet attachment portion (movable element) has four side surfaces but also a polygon shape having 6, 8,..., (2n) side surfaces. In this case, it is arranged so as to fill the space formed between the respective adjacent end faces of the two adjacent stator core units, and receives a part of the plurality of annular windings located in the space. 2n magnetic coupling bodies that magnetically connect two adjacent stator core units with a plurality of slots arranged in the axial direction, and two stator core units respectively corresponding to the 2n magnetic coupling bodies. And mechanical connection means for mechanically connecting the first and second members.

In the present invention, as the stator core unit,
A so-called openingless type in which the slot does not open on the magnetic pole surface side of the magnetic pole portion can be used. In a stator using such a stator core unit, a plurality of winding conductors are formed by being wound in a ring shape, are arranged at predetermined intervals in the axial direction, and are arranged so as to surround the periphery of the mover. And a gap between the permanent magnet array of the mover and a pair of adjacent magnetic poles, which is opposed to the permanent magnet row of the mover by a predetermined gap, and which receives a part of the corresponding annular winding between two adjacent magnetic pole portions. A stator core body and a stator core integrally having a slot closing portion that magnetically connects the plurality of magnetic pole portions and the plurality of magnetic pole portions on the side facing the mover and closes the slot. A supplemental core member is provided for closing the opening formed at a position facing the slot closing portion of the formed slot to form a yoke. Also in this case, the two stator core units are arranged so as to fill a space formed between adjacent end faces of two adjacent stator core units, and receive a part of a plurality of annular windings located in the space. Four magnetic coupling bodies, which are provided with a plurality of slots arranged in the axial direction and magnetically connect two adjacent stator core units, and mechanically convert the four magnetic coupling bodies into two corresponding stator core units, respectively. And mechanical connecting means for connecting to the second member.

Further, according to the present invention, the magnet mounting portion has a quadrangular prism shape having four side surfaces, and a plurality of permanent magnets are each formed of a plate-like permanent magnet which can be mounted on the side surface. A row is formed on each of the four side surfaces, and each of the four stator core units has a plurality of stator core divisions having a combination structure that can be axially combined with a portion of the yoke corresponding to the slot. The gap between the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit and the magnetic pole surfaces of the plurality of flat permanent magnets forming the corresponding permanent magnet row However, the present invention can be applied to a cylinder-type linear synchronous motor that is substantially constant. In this case, the two adjacent stator core units are disposed in a space formed between adjacent end faces of the two adjacent stator core units, and cover a plurality of annular windings located in the space. And four magnetic coupling bodies for magnetically coupling between the stator core units. The plurality of stator core divisions constituting the stator core unit each have one magnetic pole portion and are formed by stacking a plurality of steel plates in a direction orthogonal to the direction in which the plurality of stator core divisions are arranged. Each of the plurality of stator core divided bodies is formed with a slit that opens toward the magnetic pole surface of the magnetic pole portion and two side surfaces of the magnetic pole portion located on both sides in the stacking direction of the plurality of steel plates. Among the plurality of stator core divided bodies constituting the four stator core units, the four stator core divided bodies arranged in the circumferential direction are:
An annular fixing plate made of a magnetic material arranged so as to surround the mover is fitted into the four slits formed in the four stator core divided bodies, and their mutual positional relationship is fixed. And four protrusions located in four spaces formed between adjacent end faces of two adjacent stator core units. The four magnetic connectors are
It has a shape that covers a plurality of annular windings in a state of being engaged with a plurality of protrusions located in corresponding spaces. The relative positional relationship between the stator core divided bodies is fixed by the annular fixed plate, so that not only the assembly is facilitated, but also the stator is attracted by the magnetic attractive force of the permanent magnet acting on the magnetic pole surface of the magnetic pole portion of the stator core unit. Distortion of the shape of the core unit can be prevented.

The four magnetic coupling bodies used in the above embodiment each have an L-shaped cross section in a direction perpendicular to the longitudinal direction, and have two longitudinal edges extending in the longitudinal direction. Hooks extending along the direction are formed integrally with each other. The four protrusions provided on the annular fixing plate have a shape with which the hook can engage. The magnetic coupling body of such a shape is prepared in advance of an appropriate length, and cut into an appropriate length according to the length of the core to be applied, so that a core of any length can be cut. Because it can be applied, it is suitable for high-mix low-volume production. Also, since four integrated magnetic coupling bodies are fixed to the stator core unit,
The shape of the stator core unit can be prevented from being distorted due to the magnetic attraction of the permanent magnet acting on the magnetic pole surface of the magnetic pole portion of the stator core unit.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic perspective view of an example of an embodiment of a mover and a stator of a cylinder type linear synchronous motor of the present invention. FIG. 2 is a plan view showing the structure of the stator core unit. FIG. 3 is a schematic perspective view of a magnetic coupling body described later. The cylinder type linear synchronous motor includes a mover 1 and a stator 3. The mover 1 has a structure in which a magnet mounting portion 7 having a quadrangular prism shape is fixed to an iron linear motion shaft 5 made of a magnetic material. The linear motion shaft 5 is supported by a pair of linear bearings (not shown) so as to be able to reciprocate linearly. Magnet mounting part 7 fixed to linear motion shaft 5
Has a quadrangular prism shape extending along the axial direction of the linear motion shaft 5, and is provided on four sides (four sides surrounding the linear motion shaft) 7a, 7b, 7c, 7d of the quadrangular prism shape. Are provided with permanent magnet rows 9, 11, 13, 15 respectively.
Each of the permanent magnet rows 9 to 15 includes a plurality of flat permanent magnets arranged in the axial direction. Four flat permanent magnets 9
15 to 15 are attached in contact with other flat permanent magnet rows 9 to 15 adjacent in the circumferential direction. The length of the four flat permanent magnet rows 9 to 15 in the circumferential direction is determined by the magnet mounting portion 7.
Is longer by the thickness of the plate-shaped permanent magnet rows 9 to 15 than the circumferential length of. Therefore, the projecting portions 9a, 11a, 1 corresponding to the thicknesses of the plate-like permanent magnet rows 9 to 15 from the ends of the side surfaces 7a, 7b, 7c, 7d of the magnet mounting portion 7
3a, 15a are projected, and the projections 9a, 11
a, 13a and 15a are other flat permanent magnet rows 9 to 15
Are in contact with the end faces 9b, 11b, 13b, and 15b, respectively. The method of attaching the four permanent magnet rows 9 to 15 to the magnet attaching section 7 is arbitrary. For example, the four permanent magnet rows 9 to 15 may be fixed to the magnet attaching section 7 via an adhesive or the entire permanent magnet rows 9 to 15 may be fixed. You may mold with a synthetic resin. Further, after a heat-shrinkable tube is put on the outside of the magnet mounting portion 7 to which the permanent magnet arrays 9 to 15 are attached, the heat-shrinkable tube is heated and thermally shrunk so that the permanent magnet arrays 9 to 15 are entirely wrapped. You may. The method of fixing the magnet mounting portion 7 to the linear motion shaft 5 is arbitrary.

Around the mover 1, a yoke 17a and magnetic pole faces 17b in the radial direction of the linear motion shaft 5 are opposed to the flat permanent magnets and are spaced apart from each other by a predetermined distance in the axial direction of the linear motion shaft 5. Four stator core units 17 having seven magnetic pole portions 17c arranged are arranged. The four stator core units 17 are arranged at equal intervals in the circumferential direction (90 ° intervals in this example) such that the magnetic pole faces 17b face the permanent magnet rows 9 to 15 of the mover 1, respectively. .

As shown in FIG. 2, each stator core unit 17 has seven stator core divided bodies 19a to 19g.
Are combined in the axial direction. Each stator core unit 19a to 19g is
The yoke 17a corresponding to the center of the slot 18 has a combination structure 21 that can be separated in the axial direction. Each of the stator core divided bodies 19a to 19g has one magnetic pole part 17c and a yoke constituent part that constitutes a part of the yoke 17a. The slot 18 formed between two adjacent stator core divisions has an opening 18b opening toward the mover 1 and a winding receiving portion 18a for receiving at least a part of the annular windings 25a. are doing. Magnetic pole part 1 of stator core divided bodies 19a to 19g
9c, the width of the opening 18b of the slot 18 in the axial direction (the width in the left-right direction in FIG. 2) is the winding receiving portion 18a.
Has a shape that is widened at the end so as to be smaller than the width in the axial direction. On a combination surface (contact surface) of two adjacent stator core divided bodies, a concave portion 21a and a convex portion 21b that can be combined to form the combination structure portion 21 are formed, respectively. The two stator core divisions are connected to each other by their combination structures 21. A plurality of fixing holes 23 are formed in the yoke components of the stator core divided bodies 19a to 19g to connect a magnetic coupling body 29 described later to the stator core unit. Each of the stator core divided bodies 19a to 19g is configured by stacking a plurality of silicon steel plates. In this example, a plurality of silicon steels are laminated in the circumferential direction of the linear motion shaft 5 to form the stator core divided bodies 19a to 19g. Two stator core divisions 19a and 19 located at both ends in the axial direction among the stator core divisions 19a to 19g
g has the same shape, and the five stator core splits 19b to 19f located between the two stator core splits 19a and 19g have the same shape, respectively.

Six slots 18 formed between two adjacent magnetic pole portions 17c of each stator core unit 17 have annular windings 25a constituting exciting windings formed by winding winding conductors in an annular manner. To 25f are fitted respectively. In the perspective view of FIG. 1, only the annular winding 25a is shown using broken lines. Two adjacent stator core units 17
Between them, four spaces 27 extending in the axial direction are formed. In order to magnetically connect two adjacent stator core units 17 to the four spaces 27, a magnetic connecting body 29 shown in FIG. The perspective view shown in FIG. 1 shows a state where the magnetic coupling bodies 29 are arranged in the four spaces 27, respectively. When the magnetic coupling body 29 is arranged in the space 27, the magnetic coupling body 29 is arranged such that slots 29a to 29f processed to have a size and a shape for accommodating a part of the annular windings 25a to 25f are arranged in the axial direction. Is formed. Also, the magnetic coupling body 29
The two surfaces 30a and 30b that are exposed when the first and second stator core units are arranged in the space 27 are provided with through holes 3 for screwing and fixing the two adjacent stator core units with a screw member 35.
1, 33 are formed side by side in the axial direction. The magnetic member 29 is firmly fixed between the adjacent stator core units by the screw member 35, and the space 27 is firmly filled. The through holes 31 and 33 formed in the magnetic coupling body 29, the fixing holes 23 and the through holes 31 and 33 formed in the stator core unit 17, and the screw members 35 inserted into the fixing holes 23 mechanically. The connecting means 37 is constituted.

The annular windings 25a to 25f of the stator 7 of the linear synchronous motor shown in FIG.
Combining 19g, 4 stator core units 17 ...
Are assembled together between the two stator core splits. FIG. 4 is a diagram for explaining a method of assembling the stator 3 of the cylinder type linear synchronous motor shown in FIG. Although FIG. 4 shows only a method of assembling one stator core unit 17, actually, four stator core units 17 are simultaneously assembled. First, a base 43 having an assembling jig 41 disposed on a flat assembling plate 39 at 90 ° intervals is prepared. The assembling jig 41 is formed with a concave portion 41a serving as a guide for securely fixing the stator core divided bodies 19a to 19g to prevent displacement when the stator core divided bodies 19a to 19g are combined. Further, the assembly jig 41 is formed with two columnar projections 41b for coupling with another assembly jig 41.

The four stator core divisions 19a for forming the four stator core units 17 are assembled into an assembling jig 41.
And the annular winding 25a is disposed thereon.
Place. Next, an assembly jig 41 is prepared and connected to the jig 41 on the base 43. As a method of connecting the assembly jigs 41, the projections 41b are inserted into insertion holes into which the projections 41b (not shown) are inserted. Then, the four stator core divisions 19b are combined on the four stator core divisions 19a with the annular winding 25a interposed therebetween. Thereafter, the annular windings 25b to 25f and the four stator core divided bodies 19c to
In the same manner, four stator core units 17 are assembled at the same time by assembling the 19 g in the same manner. Finally, a laser is applied to the joint between the stator core divisions 19a to 19g to integrate the stator core divisions 19a to 19g. By doing so, the four stator core divided bodies do not move during the assembling operation, and the assembling is facilitated.

As described above, the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit are configured to be substantially flat, and the plurality of permanent magnets constituting the row of permanent magnets mounted on the magnet mounting portion of the magnet mounting body. When a plate-shaped magnet is used, the magnetic pole surface of the permanent magnet becomes flat, and the gap size between the magnetic pole surfaces of the plurality of magnetic pole portions becomes substantially constant. In this way, since the gap dimension between the magnetic pole surface of the stator and the magnetic pole surface of the mover does not substantially change, the largest thrust is obtained magnetically, and the linear motion shaft is rotated. It is possible to prevent a large torque from being generated.

Further, by arranging the magnetic coupling body in a space formed between the adjacent end faces of two adjacent stator core units, the magnetic path cross-sectional area is substantially increased, so that the winding space is reduced. The design can be made as large as possible, and a large thrust can be obtained.

In this embodiment, it is possible to use a stator core unit obtained by combining stator core divisions having a slot shape and a combination structure shown in FIG. In FIG. 5, members similar to those constituting the previous embodiment shown in FIG. 2 are denoted by reference numerals obtained by adding 100 to the reference numerals given in FIG. I do. The stator core unit 117 shown in FIG. 5 and the stator core unit 17 shown in FIG. 2 differ in the shape of the slot 118 and the shape of the combination structure 121. A dovetail-shaped convex portion 121b and a concave portion 1 into which a dovetail-shaped convex portion 121b are fitted in a combination structure portion 121 of two adjacent stator core divided bodies.
21a are formed respectively. Also slot 1
The width in the axial direction of the opening 118b of the 18 is extremely narrower than that of the winding receiving portion 118a. As described above, the present invention can be applied to the present invention even when the shapes of the combination structure and the slot connecting the stator core divided bodies constituting the stator core unit are different.

FIG. 6 is a view showing an example of an embodiment in which the present invention is applied to a cylinder type linear synchronous motor without using a frame, and FIG. 6 (A) is a partial sectional view of the cylinder type linear synchronous motor. FIG. 6B is a bottom view. FIG. 7 is a perspective view schematically showing a correspondence relationship between one stator core divided body used in this cylinder type linear synchronous motor and an annular fixed plate, and FIG. 8 shows the stator core divided body shown in FIG. It is a top view which shows the outline of the below-mentioned annular fixing plate fitted. 6 to 8, the same members as those constituting the motor of the embodiment shown in FIGS. 1 to 4 have the same numbers as those obtained by adding 200 to the reference numerals given in FIGS. 1 to 4. The reference numerals are attached and the description is omitted in principle.

The cylinder type linear synchronous motor of this embodiment is a so-called frameless type motor which does not include a frame surrounding a fixed core. Therefore FIG.
As shown in the figure, the stator core unit 217 includes a stator core divided body 219a constituting the stator core unit 217.
To 219j, the stator core divided bodies 219a and 219j at both ends are fixed to end brackets 245 and 247, respectively. Stator core split bodies 219a and 2
Protrusions 249 and 251 are formed in the yoke component of 19j. Also, end brackets 245 and 247
The recesses 253 and 255 are provided at portions where the stator core divided bodies 219a and 219j are fixed. The projections 249 and 251 and the recesses 253 and 255 are fitted to define the positional relationship between the end bracket and each stator core unit. The end brackets 245 and 247 are connected to each other by four long fixing screws 257 to 259 so as to sandwich the stator core therebetween.

Openings 245a and 247a of the end brackets 245 and 247 have a pair of linear bearings 265 and 267, which are composed of ball splines 261 and 263.
Are fitted. The linear motion shaft 205 is provided with an end bracket 245 by the pair of linear bearings 265 and 267.
, And 247 so as to be able to reciprocate linearly. Also, linear bearings 265 and 267 (ball splines 261 and 2) are attached to the end brackets 245 and 247.
63) are provided with lubricant supply ports 266 and 268 for supplying lubricant (grease), respectively. By arranging two linear motion shafts 205 in parallel, the mover 20
1 is prevented from rotating. A rear member 269 is fixed to a rear end (the right side in FIG. 6) of the linear motion shaft 205 by a mounting bolt 271. Further, a driving portion 273 of the linear sensor is fixed by a bolt 275 in parallel with the linear motion shaft 205.

The stator core unit 217 is formed by combining stator core divided bodies 219a to 219j in the direction of the axis XX. Each stator core divided body 219a-2
19j is a combination structure part 22 separable in the axial direction XX
Are connected to each other. The stator core divided bodies 219a to 219j each have one magnetic pole part 217c.
, And a plurality of steel plates are stacked in a direction orthogonal to a direction (axis XX direction) in which the plurality of stator core divided bodies are arranged. The stator core divided bodies 219a to 219j used in this example are opened toward the magnetic pole face 217b of the magnetic pole part 217c and the two side faces 217d and 217e of the magnetic pole part 217c located on both sides in the laminating direction of the plurality of steel plates. Slits 277 are formed respectively. FIG. 7 shows slits 2 for easy understanding.
One stator core split 219b on which 77 is formed
Only shows.

Further, among the plurality of stator core divisions constituting the four stator core units 217, the four stator core divisions 219b arranged in the circumferential direction form the four stator core divisions 219b. 4 slits 2
An annular fixing plate 279 is fitted to 77. As shown in FIGS. 7 and 8, the annular fixing plate 279 is formed of a rectangular thin magnetic material, and has a through hole 279 i in the center portion through which the rectangular movable element 201 passes. The four sides 279e, 279f, 27 of the annular fixed plate 279 are provided in the slits 277 of the four stator core divided bodies.
9g and 279h are fitted respectively. Annular fixing plate 27
9 is fitted into the four stator core splits, the space formed between adjacent end faces of two adjacent stator core splits has four corners of the annular fixed plate 279. The triangular sides 279a, 279b, 279c, 279d are respectively exposed. The four magnetic coupling bodies arranged to fill the space include the triangle sides 279a and 279a.
A plurality of slits (not shown) each having a size to be fitted with 79b, 279c, 279d are formed. This slit is provided separately from the slit into which a part of the annular winding is fitted.

The use of the annular fixing plate 279 as in this embodiment facilitates the assembly of the stator core unit. For example, an annular fixing plate 279 is previously formed in slits of four stator core divided bodies.
Many blocks of the stator core divided body having the four sides fitted are prepared. Then, merely by connecting the blocks of the stator core divided body in the axial direction, four stator core units are completed.

In this way, the positional relationship between the four stator core divided bodies arranged in the circumferential direction is determined by the annular fixed plate 279, and the magnetic attractive force of the permanent magnet acting on the magnetic pole surface of the magnetic pole portion of the stator core unit is used. It is possible to prevent the stator core unit from moving toward the axis and distorting the stator core unit. Further, the gap between the permanent magnet row and the magnetic pole surface of the magnetic pole portion of the stator core unit can be kept constant, and a large thrust can be obtained. In addition, the stator core unit can be easily assembled.

FIG. 9 is a schematic perspective view of a cylinder type linear synchronous motor according to another embodiment of the present invention. FIG. 10 shows FIG.
FIG. 6 is a plan view showing a shape of a stator core body used in the cylinder type linear synchronous motor of FIG. FIG. 11 is a schematic view showing an assembling method of the cylinder type linear synchronous motor shown in FIG. 8 to 11, members similar to the members constituting the embodiment shown in FIGS. 1 to 4 are denoted by reference numerals obtained by adding 300 to the reference numerals given in FIGS. 1 to 4. The explanation is omitted in principle. The difference between the cylinder type linear synchronous motor shown in FIG. 9 and the embodiment shown in FIGS.
That is, a so-called openingless stator core is used for the stator core body. In the openingless stator core 317, a plurality of magnetic pole portions 317 c located on the side facing the mover 301 are magnetically connected via a slot closing portion 318 c that closes the slot 318.
At both ends of the stator core 317, two fixing holes 3 into which screw members 335 are inserted for fixing the magnetic coupling body 329 are provided.
23 are formed. The slot opening 318 b formed at a position facing the slot closing portion 318 c of the slot 318 is closed by the supplemental core member 345. The supplementary core member 345 has a quadrangular prism shape,
A recess 346 is formed on each of the two surfaces 345a and 345b in the length direction along the length direction. The supplementary core member 345 forms a yoke 317.
Four spaces 327 extending in the axial direction are formed between two adjacent stator core units 317. In order to magnetically connect two adjacent stator core units 317 in the four spaces 327, a quadrangular prism-shaped magnetic connector 329 shown in FIG. 8 is arranged. The magnetic coupling body 329 has slots 329a to 329 that are formed in a size and shape to accommodate a part of the annular windings 325a to 325f when the magnetic coupling body 329 is arranged in the space 327.
29f are formed side by side in the axial direction. Also, when the magnetic coupling body 329 is arranged in the space 327,
On the three surfaces 330a and 330b, through holes 331 and 333 are formed in the axial direction so as to be fixed to two adjacent stator core units by screwing with a screw member 335. The magnetic coupling body 329 is firmly fixed by firmly filling the space 327 by the screw member 335. As described above, even when an openingless core is used as the stator core, a yoke is formed by using the supplemental core member 345. Further, the magnetic coupling body 329 can prevent the leakage magnetic flux generated in the four spaces. The assembling method of the cylinder type linear synchronous motor shown in FIG. 9 is basically the same as the assembling method shown in FIG. 4, except that the stator core units 317... The supplementary core member 345 is inserted through one of the slot openings 318b of the slot 318.
Should be inserted.

In each of the above-described embodiments, the quadrangular mover in which the magnet mounting portion (movable element) has four side surfaces has been described. An octagonal mover having a mounting portion having eight side surfaces may be used. When the mover has a hexagonal shape, six stator core units are provided, and a space formed between adjacent end faces of two adjacent stator core units is filled so as to fill the space between two adjacent stator core units. Are magnetically connected to each other. When the mover is octagonal, eight stator core units are provided, and eight magnetic coupling bodies are provided.

FIG. 12 is a schematic perspective view of a cylinder type linear synchronous motor according to another embodiment of the present invention. This embodiment is similar to the above-described embodiment described with reference to FIGS. FIGS. 13A and 13B are views showing the structure of one stator core unit used in the motor of FIG. FIG. 14 is a plan view of an annular fixing plate used to fix the positional relationship between the stator core divided bodies.
FIG. 15 is a perspective view showing a structure of a magnetic coupling body arranged in a space formed between two adjacent stator core units in this embodiment. 12 to 15, the same members as those constituting the above-described embodiment shown in FIGS. 1 to 8 have the same reference numerals as those in FIGS.
The reference numeral is added to the number obtained by adding 00 or 300, and the description is omitted in principle.

The difference between the cylinder type linear synchronous motor shown in FIG. 12 and the above-described embodiment described with reference to FIGS. 6 to 8 is that the annular fixed plate 479 used in the present embodiment is different.
Are different from the shape of the annular fixed plate 279 shown in FIGS. 6 and 7, and the structure of the magnetic coupling member 437 is different.

Each stator core unit 4 used in this embodiment
Reference numeral 17 denotes a stator core divided body 4 as shown in FIG.
19a to 419h are combined in the axial direction. In this embodiment, a stator core 517 having a structure shown in FIG. 13B can be used. The structure of the stator core 517 is the same as that of the stator core 117 shown in FIG. FIG.
(A) shows only the stator divided bodies 419a to 419g of the cylinder type linear synchronous motor shown in FIG.
As shown in FIG. 13A, the stator core divided body 419a
To 419h have combination structures 421 that can be separated in the axial direction at the portion of the yoke 417a corresponding to the center of the slot 418 of each stator core unit 417.
In addition, each of the stator core divided bodies 419a to 419h has one magnetic pole part 417c and a yoke constituent part constituting a part of the yoke 417a. Slot 418 formed between two adjacent stator core divisions has opening 418b opening toward mover 401 and winding receiving portion 418a for receiving at least a part of annular winding 425a. are doing. Stator core split body 419a
To 419 h, the width of the opening 418 b of the slot 418 in the axial direction is the same as that of the winding receiving portion 418.
It has a shape that is widened at the end so as to be smaller than the width in the axial direction of “a”. The combination surface (contact surface) of two adjacent stator core divided bodies has a combination structure portion 421.
421a... And convex 421b that can be combined
Are formed, and two adjacent stator core divided bodies are connected to each other by the combination structure portions 421. Stator core split bodies 419a to 419h
Are formed by laminating a plurality of silicon steel plates. In this example, a plurality of silicon steels are laminated in the circumferential direction of the direct drive shaft 405 to form the stator core divided bodies 419a to 419.
h. Stator core split body 419a-41
9h, two stator core divided bodies 419a and 419h located at both ends in the axial direction have the same shape except for the concave portion 421a and the convex portion 421b, respectively.
The stator core divisions 19b to 19g located between the two stator core divisions 419a and 419h also have the same shape.

The stator core splits 419a to 419a used in this embodiment
419h includes a magnetic pole surface 417c of the magnetic pole portion 417c and magnetic pole portions 417c located on both sides in the stacking direction of the plurality of steel plates.
Are formed to open toward the two side surfaces 417d and 417e. Among the plurality of stator core divisions constituting the four stator core units 417, four stator core divisions 419b arranged in the circumferential direction include four stator core divisions 419b formed on the four stator core divisions 419b. An annular fixing plate 479 is fitted in the slit 477. As shown in FIG.
Reference numeral 79 denotes a rectangular thin magnetic material,
Protrusions 479a to 479d are formed at the two corners, respectively. The four protrusions 479a to 479d are exposed in four spaces formed between adjacent end faces of the stator core unit 417. Further, a through hole 479i through which the rectangular movable element 401 penetrates is provided at the center of the annular fixing plate 479. Four sides 479e to 479h of the annular fixed plate 479 are fitted into slits 427 provided in the four stator core divided bodies, respectively.

As shown in FIG. 15, the four magnetic coupling bodies 437 arranged to fill the space formed between two adjacent fixed core units have a transverse cross section 437c in a direction perpendicular to the longitudinal direction as L. It is shaped like a letter. The two edge portions 437a and 437b extending in the longitudinal direction include
Hooks F1 and F2 extending along the longitudinal direction are formed integrally. The hooks F1 and F2 are respectively engaged with the steps 481a to 481h formed on the four protrusions 479a to 479d of the annular fixing plate 479, and cover the annular winding 425a exposed in the above-described space. I have. Each of the four protrusions 479a to 479d has a through hole 479j. Each annular fixing plate 479
Long through bolts for mechanically connecting the respective annular fixing plates 479 to each other are inserted into through holes 479j formed in the protruding portions 479a to 479d, respectively, and the flange 247 and the bracket 245 (not shown) Are tightened together. Therefore, the four magnetic coupling bodies 437 do not fall out of the stator core unit. in this way,
In the present embodiment, since the mutual positional relationship of the four stator core divided bodies arranged in the circumferential direction is fixed by the annular fixing plate, the magnetic attraction force of the permanent magnet acting on the magnetic pole surface of the magnetic pole portion of the stator core unit This can prevent the shape of the stator core unit from being distorted. Further, by disposing the magnetic coupling body in the space formed between the adjacent end faces of the two adjacent stator core units, the magnetic path area is substantially increased. Large thrust can be obtained, and a large thrust can be obtained.

FIG. 16 is a perspective view showing still another embodiment of the present invention. In FIG. 16, the same reference numerals as those in FIG. 12 are added with 200, and the description of the main parts is omitted. In this embodiment, four magnetic coupling bodies 63
7 is constituted by combining a plurality of magnetic coupling divided bodies 637a that can be combined in the axial direction with each other in the axial direction. FIG. 17 is a perspective view of one magnetic coupling split body 637a. The other structure except for the magnetic coupling body is the same as that of the above-described embodiment shown in FIGS. Therefore, in this embodiment, the annular fixing plate shown in FIGS. 7 and 8 is employed. The four sides 279a, 279b, 279c, 2c of the annular fixed plate 279 shown in FIG.
79d is fitted. The magnetic coupling split body 637a includes a plate state 637c in which a slit 637b is formed, and a plate-like part 637c integrally connected to an upper end of the plate-like part 637c.
And an outer wall portion 637d having an L-shaped cross-sectional shape extending on both sides in the thickness direction (on both sides in the axial direction of the motor when combined). And the plate-like portion 63
A through hole 637d penetrating the plate-shaped portion 637c in the thickness direction is formed in 7c. In the assembled state as shown in FIG. 16, through bolts are inserted into the through holes 637d of the magnetic coupling divided bodies 637a aligned in the axial direction, and the flange 247 and the bracket 2 (not shown) are inserted.
It is tightened together with 45. Therefore, each magnetic coupling body 637
Does not fall out of the stator core unit.

As in the present embodiment, the magnetic coupling body 637
Is constituted by a plurality of magnetic coupling divisions 637a, a stator having an arbitrary length can be easily manufactured.

In the embodiment shown in FIG. 12, as in the embodiment shown in FIG. 16, the magnetic coupling body can be composed of a plurality of magnetic coupling divisions. The magnetic coupling split body used in that case has a shorter magnetic coupling body 437 shown in FIG.

[0047]

According to the present invention, by arranging the magnetic coupling body in the space formed between the adjacent end faces of two adjacent stator core units, the magnetic path cross-sectional area is substantially increased. Therefore, the winding space can be designed to be as large as possible, and a large thrust can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of an example of an embodiment of a mover and a stator of a cylinder type linear synchronous motor of the present invention. It is a top view which shows the structure of a stator core unit.

FIG. 2 is a plan view showing a structure of a stator core unit of FIG.

FIG. 3 is a schematic perspective view of the magnetic coupling body of FIG. 1;

FIG. 4 is a diagram illustrating a method of assembling a stator 3 of the cylinder type linear synchronous motor.

FIG. 5 is a plan view showing a modified example of the stator core unit of FIG. 2;

FIG. 6 is a diagram showing an example of an embodiment in which the present invention is applied to a cylinder type linear synchronous motor not using a frame, and FIG. 6 (A) is a partial sectional view of the cylinder type linear synchronous motor; 6 (B) is a bottom view.

FIG. 7 is a schematic perspective view of a stator core divided body and an annular fixed plate used in FIG. 6;

FIG. 8 is a schematic front view of an annular fixing plate used in FIG.

FIG. 9 is a schematic perspective view of a cylinder-type linear synchronous motor according to another embodiment of the present invention.

FIG. 10 is a plan view of a stator core unit used in FIG. 9;

FIG. 11 is a view used to explain the assembling of the stator of the cylinder-type linear synchronous motor of FIG. 9;

FIG. 12 is a schematic perspective view of a cylinder-type linear synchronous motor according to another embodiment of the present invention.

13A and 13B are diagrams showing the structure of a stator core unit used in FIG.

FIG. 14 is a plan view of an annular fixing plate used to fix the positional relationship between the stator core divided bodies.

FIG. 15 is a perspective view showing a structure of an example of a magnetic coupling body arranged on a space adjacent to a stator core unit.

FIG. 16 is a schematic perspective view of a cylinder-type linear synchronous motor according to another embodiment of the present invention.

FIG. 17 is a perspective view showing the structure of an example of a magnetic coupling split used in the embodiment of FIG. 16;

[Description of Signs] 1,201,301,401 Mover 3,203,303,403 Stator 5,205,305,405 Linear motion shaft 7,207,307,407 Magnet mounting parts 9-15,209-215 , 309-315, 409-
415 Permanent magnet row 17, 217, 317, 417 Stator core unit 19, 219, 319, 419 Stator core divided body 21, 121, 221, 321, 421, 521 Combined structure part 23, 123, 323 Fixing hole 25a To 25f, 225a to 225f Annular windings 29, 329, 429 Magnetic coupling bodies 31, 33, 331, 333 Through holes 35, 335 Screw members 37, 337 Mechanical coupling means 245 Auxiliary core members 277, 477, 577 Slits 279, 479 Annular fixed plate

Continued on the front page (72) Inventor Satoshi Sugita 1-15-1 Kita-Otsuka, Toshima-ku, Tokyo Sanyo Electric Co., Ltd. (72) Inventor Hideyuki Ishii 1-15-1 Kita-Otsuka, Toshima-ku, Tokyo Sanyo Inside Electric Co., Ltd. (72) Inventor Shinji Suzuki 1-15-1 Kita-Otsuka, Toshima-ku, Tokyo Sanyo Inside Electric Co., Ltd. (72) Satoru Onodera 1-15-1 Kita-Otsuka, Toshima-ku, Tokyo Sanyo F-term in Electric Co., Ltd. (reference) 5H641 BB06 BB14 BB19 GG02 GG04 GG08 GG11 HH03 HH05 HH08 HH12 HH13 HH14

Claims (14)

[Claims] A linear motion shaft reciprocating in the axial direction; a magnet mounting portion fixed to the linear motion shaft; and a plurality of permanent magnets fixed to the magnet mounting portion and arranged in the axial direction of the linear motion shaft. A movable element including two permanent magnet rows, and a plurality of winding conductors formed by being wound in an annular shape, disposed at predetermined intervals in the axial direction, and disposed so as to surround the periphery of the movable element. And a plurality of magnetic pole portions opposing the permanent magnet row of the mover with a predetermined gap therebetween, and a yoke for magnetically connecting the plurality of magnetic pole portions, and the two adjacent magnetic pole portions A stator comprising four stator core units in which the plurality of magnetic pole portions are spaced apart in the axial direction so as to form a slot for receiving a part of the annular winding corresponding thereto; The magnet mounting part is 4 And the plurality of permanent magnets are plate-shaped permanent magnets each of which can be mounted on the side surface, and the four permanent magnet rows are each one of the four side surfaces. The four stator core units are formed on the yoke portion corresponding to the slots, and each of the stator core units has a combination structure that can be combined in the axial direction. And a gap between the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit and the magnetic pole surfaces of the plurality of flat permanent magnets forming the corresponding permanent magnet row. Is a substantially constant cylindrical linear synchronous motor, which fills a space formed between adjacent respective end faces of two adjacent stator core units. A plurality of slots arranged in the axial direction so as to receive a part of the plurality of annular windings located in the space, respectively, so that two adjacent stator core units are magnetically disposed between the two adjacent stator core units. A cylinder-type synchronous motor, comprising: four magnetic coupling bodies to be coupled. 2. The cylinder type synchronous motor according to claim 1, wherein each of the four magnetic coupling bodies is formed integrally. 3. The cylinder type synchronous motor according to claim 1, wherein each of the four magnetic coupling bodies is formed by combining a plurality of magnetic coupling division bodies that can be combined in the axial direction in the axial direction. 4. A cylinder type synchronous motor, further comprising mechanical coupling means for mechanically coupling the four magnetic coupling bodies to the corresponding two stator core units, respectively. 5. The four plate-shaped permanent magnets, which are arranged in the circumferential direction of the magnet mounting portion and have magnetic poles of the same polarity on a magnetic pole surface,
The cylinder type synchronous motor according to claim 1, wherein the cylinder type synchronous motor is in contact with each of the other plate-shaped permanent magnets adjacent in the circumferential direction. 6. The mechanical coupling unit includes: a plurality of through holes formed in the magnetic coupling body; a plurality of fixing holes formed in the stator core unit; a plurality of fixing holes formed in the stator core unit; The cylinder type synchronous motor according to claim 4, comprising a plurality of screw members respectively inserted into the fixing holes. 7. The plurality of stator core divisions constituting the stator core unit each have one magnetic pole portion, and each of the plurality of stator core divisions has a direction perpendicular to a direction in which the plurality of stator core divisions are arranged. A plurality of steel plates are stacked, and the plurality of stator core divided bodies have two magnetic pole portions, one of which is a magnetic pole surface of the magnetic pole portion and the other of the magnetic pole portions located on both sides in the stacking direction of the plurality of steel plates. Slits each opening toward the side face are formed, and among the plurality of stator core divisions constituting the four stator core units, the four stator core divisions arranged in the circumferential direction are: An annular fixed plate made of a magnetic material disposed so as to surround the mover is fitted into the four slits formed in the four stator core divided bodies, and the mutual positional relationship is fixed. Cylinder type synchronous motor according to claim 2 or 3, symptoms. 8. The cylinder type synchronous motor according to claim 7, wherein a plurality of slits are formed in each of the four magnetic coupling bodies so that a part of each of the plurality of annular fixing plates is fitted. 9. The cylinder type synchronous motor according to claim 7, wherein a plurality of slits are formed in each of the plurality of magnetic coupling divided bodies so that a part of each of the plurality of annular fixing plates is fitted. 10. A linear motion shaft reciprocating in the axial direction, a magnet mounting portion fixed to the linear motion shaft, and a plurality of permanent magnets fixed to the magnet mounting portion and arranged in a line in the axial direction of the linear motion shaft. A mover comprising a permanent magnet row (n is a natural number of 2 or more); and a winding conductor formed by being wound in a ring shape, being arranged at a predetermined interval in the axial direction, and A plurality of annular windings arranged so as to surround the periphery, a plurality of magnetic pole portions facing the permanent magnet row of the mover via a predetermined gap, and a yoke for magnetically connecting the plurality of magnetic pole portions. A plurality of 2n fixed poles in which the plurality of magnetic pole portions are spaced apart in the axial direction so as to form a slot for receiving a part of the annular winding corresponding to a portion between two adjacent magnetic pole portions A stator comprising a child core unit; The magnet mounting portion has a prism shape having 2n side surfaces, and the plurality of permanent magnets are each formed of a plate-like permanent magnet attachable to the side surface, and the 2n permanent magnets are provided. A row is formed on each of the 2n side surfaces, and the 2n stator core units have a combination structure portion that can be combined in the axial direction with a portion of the yoke corresponding to the slot. The plurality of plate-shaped permanent magnets which are configured by combining a plurality of stator core divided bodies in the axial direction, and which constitute the permanent magnet row corresponding to the magnetic pole surfaces of the plurality of magnetic pole portions of the fixed core unit. A gap between the magnetic pole faces of the cylinder-type linear synchronous motor, wherein the gap between the pole faces is substantially constant; Two adjacent stators arranged to fill the space to be formed and comprising a plurality of slots aligned in the axial direction to respectively receive a part of the plurality of annular windings located in the space. 2n magnetic coupling bodies for magnetically coupling between the core units; and mechanical coupling means for mechanically coupling the 2n magnetic coupling bodies to the corresponding two stator core units, respectively. A cylindrical synchronous motor characterized by the above-mentioned. 11. A linear motion shaft reciprocating in the axial direction, a magnet mounting portion fixed to the linear motion shaft, and a plurality of permanent magnets fixed to the magnet mounting portion and arranged in the axial direction of the linear motion shaft. A movable element including two permanent magnet rows, and a plurality of winding conductors formed by being wound in an annular shape, disposed at predetermined intervals in the axial direction, and disposed so as to surround the periphery of the movable element. And a pair of coils 2 facing and adjacent to the permanent magnet row of the mover through a predetermined gap.
A plurality of magnetic pole portions arranged at intervals in the axial direction so as to form a slot for receiving a part of the annular winding corresponding to one of the magnetic pole portions, and the plurality of magnetic pole portions on a side facing the mover. A stator core body integrally having a slot closing portion for closing the slot by magnetically connecting the magnetic pole portions of the stator core, and a slot formed in the stator core and formed at a position facing the slot closing portion of the slot. And a stator having four stator core units each having a supplementary core member forming a yoke by closing the opening, wherein the magnet mounting portion has a quadrangular prism shape having four side surfaces. Wherein the plurality of permanent magnets are each formed of a flat permanent magnet attachable to the side surface, and the four permanent magnet rows are formed on the four side surfaces, respectively. A cylinder type in which a gap between the magnetic pole surfaces of the plurality of magnetic pole portions of the fixed core unit and the magnetic pole surfaces of the plurality of flat plate-like permanent magnets constituting the corresponding permanent magnet row is substantially constant. A linear synchronous motor, wherein one of the plurality of annular windings is disposed so as to fill a space formed between adjacent end faces of two adjacent stator core units and located in the space. And four magnetic coupling bodies that magnetically connect two adjacent stator core units with a plurality of slots arranged in the axial direction so as to receive the respective parts, and correspond to the four magnetic coupling bodies, respectively. A mechanical coupling means for mechanically coupling to the two stator core units. 12. The four plate-shaped permanent magnets, which are arranged in the circumferential direction of the magnet mounting portion and have the same polarity on the magnetic pole surface, come into contact with the other plate-shaped permanent magnets adjacent to each other in the circumferential direction. The cylinder type synchronous motor according to claim 11, wherein: 13. A linear motion shaft reciprocating in an axial direction, a magnet mounting portion fixed to the linear motion shaft, and a plurality of permanent magnets fixed to the magnet mounting portion and aligned in the axial direction of the linear motion shaft. A movable element including two permanent magnet rows, and a plurality of winding conductors formed by being wound in an annular shape, disposed at predetermined intervals in the axial direction, and disposed so as to surround the periphery of the movable element. And a plurality of magnetic pole portions opposing the permanent magnet row of the mover with a predetermined gap therebetween, and a yoke for magnetically connecting the plurality of magnetic pole portions, and the two adjacent magnetic pole portions A stator comprising four stator core units in which the plurality of magnetic pole portions are spaced apart in the axial direction so as to form a slot for receiving a part of the annular winding corresponding thereto; Wherein the magnet mounting portion is A plurality of permanent magnets, each of the plurality of permanent magnets is formed of a flat plate-shaped permanent magnet attachable to the side surface, and the four permanent magnet rows are each formed of the four side surfaces. The four stator core units are formed on the yoke portion corresponding to the slots, and each of the stator core units has a combination structure that can be combined in the axial direction. And a gap between the magnetic pole surfaces of the plurality of magnetic pole portions of the stator core unit and the magnetic pole surfaces of the plurality of flat permanent magnets forming the corresponding permanent magnet row. Is a substantially constant cylindrical linear synchronous motor, disposed in a space formed between adjacent respective end faces of two adjacent stator core units. And so as to cover a plurality of said annular windings located in said space,
Four magnetic coupling bodies for magnetically coupling between two adjacent stator core units, wherein each of the plurality of stator core divisions constituting the stator core unit has one magnetic pole. A plurality of steel cores are stacked in a direction orthogonal to a direction in which the plurality of stator core divisions are arranged, and the plurality of stator core divisions are provided in the plurality of stator core divisions. A slit that opens toward two side surfaces of the magnetic pole portion located on both sides of the magnetic pole surface and the plurality of steel plates in the laminating direction is formed, and a plurality of fixing members respectively configuring the four stator core units Among the stator core splits, the four stator core splits arranged in the circumferential direction are arranged so as to surround the mover in the four slits formed in the four stator core splits. An annular fixed plate made of a magnetic material is fitted to fix the mutual positional relationship, and the annular fixed plate is formed of four stator core units formed between two adjacent end faces of two adjacent stator core units. Four protrusions located in the space, wherein the four magnetic coupling bodies cover the plurality of annular windings in a state in which they are engaged with the plurality of protrusions located in the corresponding space. A cylindrical synchronous motor having a shape. 14. The four magnetic coupling bodies each have an L-shaped cross-sectional shape in a direction perpendicular to the longitudinal direction, and have two end edges extending in the longitudinal direction, the two magnetic coupling bodies having the longitudinal direction. 14. The hooks extending along each are integrally formed, and the four protrusions provided on the annular fixing plate have a shape with which the hooks can be engaged. The cylinder type synchronous motor as described.