JP2010004604A - Cylindrical mm type linear motor and manufacturing method for needle tereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylindrical MM-type linear motor in which a magnet can be easily positioned at a predetermined position without using a dedicated tool in complex works including drilling a plurality of holes in a yoke and pressure insertion of a pin thereinto, attaining a reduction in an assembling work time in the manufacturing process of a needle and enhancement in the reliability and versatility of the needle, furthermore, attaining a reduction in cost of the cylindrical MM-type linear motor itself, and to provide a manufacturing method for the needle of the cylindrical MM-type linear motor. <P>SOLUTION: The needle is provided with a plurality of ring-shaped spacers 5 for positioning the circular-arc magnet 4 in the axial direction and in the circumferential direction on the inside-diameter side of the yoke 3. A set constituted of one ring-shaped spacer 5 of the plurality of ring-shaped spacers 5 and of the plurality of circular-arc magnets 4, positioned by the ring-shaped spacers 5, is stuck together in the axial direction, on the inside-diameter side of the yoke 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cylindrical MM (moving magnet) type linear motor that positions and fixes a magnet to a hollow cylindrical yoke at a predetermined pitch and angle, and a method of manufacturing the movable element thereof.

  The first prior art is “related to a movable magnet type linear motor, and particularly to a movable magnet type linear motor that displaces a movable magnet body disposed in a magnetic gap of a stator core in the axial direction”, for example. The objective is to provide a movable magnet type linear motor that can increase the strength of the magnet body to improve thrust and reduce eddy current loss. A magnet holding frame in which a plurality of holding pieces are arranged around the periphery, a plurality of magnet pieces attached between the holding pieces of the holding frame, and each magnet piece attached to at least one end of the magnet holding frame. It has a holder to support "(see, for example, Patent Document 1).

  FIG. 13 is a perspective view of a movable magnet body according to the first prior art, and FIG. 14 is an exploded perspective view excluding magnet pieces in FIG. 13 according to the first prior art. In the figure, 22 is a movable magnet body, 24 is a shaft portion, 26 is a disc portion, 28 is a holding piece, 30 is a magnet holding frame, 32 is a magnet piece, 34 is a screw, 36 is a ring-shaped holder, and 38 is a groove portion. is there. In addition, the code | symbol attached | subjected to this drawing is described using the code | symbol described in 1st prior art (patent document 1).

  In FIG. 13, the movable magnet body 22 has “a disc portion 26 penetrating the shaft portion 24 at the center and extending in parallel so as to surround the shaft portion 24 at equal intervals from the peripheral portion of the disc portion 26. A cylindrical magnet holding frame 30 in which the holding pieces 28, 28, ... are integrally formed, and eight magnet pieces 32, 32, ... inserted and held between a pair of adjacent holding pieces 28, 28, respectively. The ring-shaped holder 36 that supports each magnet piece 30 by being fixed to the end portion of each holding piece 28 with a screw 34 or the like. "

  In FIG. 14, the magnet holding frame 30 is made of a nonmagnetic metal body, and “a series of groove portions 38 into which three sides of each magnet piece 32 are inserted on both sides of each holding piece 28 and the disk portion 26 are U-shaped. Each magnet piece 32 has an arcuate cross section and a pair of permanent magnet pieces 32a and 32b having magnetization vectors opposite in the radial direction aligned in the axial direction. It is constructed by joining together. "

According to the second conventional technique, in a method of manufacturing a mover for a cylindrical MM linear motor, a magnet is arranged and bonded using a large number of pins press-fitted into a hollow cylindrical yoke as a mover and a jig. There are also things.
FIG. 15 is a schematic diagram of a magnet positioning jig in the second prior art, and FIG. 16 is a schematic diagram of magnet bonding in FIG. In the figure, 17 is a yoke, 18 is a magnet, 19 is a pin, 20 is a base jig, and 21 is a shaft jig.
In FIG. 15, first, a large number of pins 19 are press-fitted so as to protrude inside a hollow cylindrical yoke 17 in which a large number of holes are machined at a predetermined pitch in the axial direction and the circumferential direction. Next, the base jig 20 into which the shaft jig 21 is press-fitted is set at a predetermined position, and the yoke 17 described above is set on the base jig 20 along the shaft jig 21 while moving in the axial direction. Secure with bolts (not shown).
In FIG. 16, the magnet 18 is bonded to the inner diameter of the yoke 17 while abutting the arc-shaped magnet 18 magnetized in the radial direction against the pin 19 and the shaft jig 21 as shown in the figure ( An adhesive is applied in advance to the adhesive surface with the yoke 17). Therefore, the magnet 18 is positioned by the pin 19 in the axial direction and the shaft jig 21 in the circumferential direction.
After the magnet 18 is bonded, the yoke 17 fixed with a bolt or the like (not shown) is removed from the base jig 20, and a large number of pins 19 press-fitted into the hollow cylindrical yoke 17 and a bonded arc shape. The mover is completed with the magnet 18 remaining.
JP 2000-228855 A (3rd page, FIGS. 3 and 4)

In the first prior art, in order to position and fix the magnet piece 32, a cylindrical magnet holding frame 30 having a plurality of holding pieces and a series of grooves 38 into which three sides of the magnet piece 32 are inserted are formed in a U shape. In addition, since the holding pieces 28 and the disk portions 26 formed on both sides and the ring-shaped holders 36 that are fixed to the end portions of the holding pieces 28 with screws 34 or the like and support the magnet pieces 30 are required, Since there are a plurality of members constituting the yoke and they are complicated, there is a problem that the assembly time in the manufacturing process of the mover increases and the cost of the cylindrical MM linear motor itself increases. Further, since the member to be formed needs to process the groove 38 and the like, there is a problem that the material processing cost is increased.
In the second prior art, a hollow cylindrical yoke 17 is used to position and bond the arc-shaped magnet 18 magnetized in the radial direction to the hollow cylindrical yoke 1 in the axial direction and the circumferential direction. In addition to processing a large number of holes, it was necessary to press-fit a large number of pins 19 into the holes and to use dedicated jigs such as the shaft jig 21 and the base jig 20, which increases the material processing cost of the yoke 17 itself. There is a problem that the assembly work time in the manufacturing process of the mover is increased, leading to an increase in cost of the cylindrical MM linear motor itself.
The present invention has been made in view of such problems, and it is easy to place a magnet at a predetermined position without complicated machining on a yoke, machining of a large number of holes, press-fitting of pins, and use of a dedicated jig. Cylindrical MM linear that can reduce the assembly work time in the manufacturing process of the mover, improve the reliability or versatility of the mover, and reduce the cost of the cylindrical MM linear motor itself An object of the present invention is to provide a motor and a method for manufacturing the movable element.

In order to solve the above problems, the present invention has the following configuration.
The invention according to claim 1 comprises a mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is In a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the mover moves the arc-shaped magnet in the axial direction on the inner diameter side of the yoke. And a plurality of ring-shaped spacers for positioning in the circumferential direction, and one of the ring-shaped spacers and a plurality of the arc-shaped magnets positioned on the ring-shaped spacers. The assembly is stacked in the axial direction on the inner diameter side of the yoke.
According to a second aspect of the present invention, the ring-shaped spacer in the first aspect of the present invention has a protrusion for positioning the arc-shaped magnet in the circumferential direction on the inner diameter side of the yoke.
According to a third aspect of the present invention, the yoke according to the first aspect of the present invention is divided into a plurality of pieces in the axial direction, and one yoke among the plurality of yokes and a plurality of yokes are provided. A set of one of the ring-shaped spacers and a plurality of arc-shaped magnets positioned on the ring-shaped spacer are stacked in the axial direction of the yoke.
According to a fourth aspect of the present invention, the ring-shaped spacer according to the first aspect of the invention has a step on a surface on which the arc-shaped magnet is positioned and mounted, and the arc-shaped magnet is arranged on the inner diameter side of the yoke. And a protrusion for positioning in the direction.
According to a fifth aspect of the present invention, the ring spacer according to the first aspect of the invention has a skew angle on a surface on which the arc-shaped magnet is positioned and mounted, and the arc-shaped magnet has a skew angle. The surface to be positioned and mounted on the ring-shaped spacer has a skew angle.
The invention according to claim 6 is provided with a mover that is a field, a stator that is an armature, and a stator support component for holding the stator. In a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the mover moves the arc-shaped magnet in the axial direction on the inner diameter side of the yoke. And a plurality of holders having magnet holding portions for positioning in the circumferential direction, the plurality of holders being arranged at regular intervals in the circumferential direction on the inner diameter side of the yoke, and the arc-shaped in the magnet holding portion A magnet is positioned and mounted.
According to a seventh aspect of the invention, the holder according to the sixth aspect of the invention has a step on the surface of the magnet holding portion on which the arc-shaped magnet is positioned and mounted.
In the invention according to claim 8, the holder according to claim 6 has a skew angle on the surface of the magnet holding portion on which the arc-shaped magnet is positioned and mounted, and the circle The arc magnet has a skew angle on a surface positioned and mounted on the holder.
The invention according to claim 9 is provided with a mover that is a magnetic field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover includes In a method of manufacturing a mover for a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the mover attaches the arc-shaped magnet to the yoke. A plurality of ring-shaped spacers for positioning in the axial direction and the circumferential direction on the inner diameter side, wherein the ring-shaped spacer is inserted into the inner diameter side of the yoke, and the arc-shaped magnet is inserted into the inner diameter side of the yoke; The arc-shaped magnet protrudes from the surface of the ring-shaped spacer to be positioned and mounted in the axial direction, and a protrusion for positioning the arc-shaped magnet in the circumferential direction on the inner diameter side of the yoke. Against positioning mounted and bonded, the insertion and to the inner diameter side of the yoke of the ring-shaped spacer is repeated and a positioning mount and bonded to the ring-shaped spacer of the arcuate magnet.
The invention according to claim 10 includes a mover that is a field, a stator that is an armature, and a stator support component that holds the stator. In a method of manufacturing a mover for a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the mover attaches the arc-shaped magnet to the yoke. It comprises a plurality of holders having magnet holding portions for positioning in the axial direction and the circumferential direction on the inner diameter side, and a plurality of the holders are arranged at regular intervals in the circumferential direction on the inner diameter side of the yoke, The arc-shaped magnet is abutted against the surface of the magnet holding portion for positioning and mounting the arc-shaped magnet and the surface of the holder for positioning in the circumferential direction on the inner diameter side of the yoke. It is to fine-bonded and fixed.
The invention according to claim 11 is provided with a mover that is a field, a stator that is an armature, and a stator support component for holding the stator. In a method of manufacturing a mover for a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the yoke is divided into a plurality of parts in the axial direction. The mover includes a plurality of ring-shaped spacers for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke, and one of the plurality of ring-shaped spacers The ring-shaped spacer is inserted into the inner diameter side of one of the plurality of yokes, and the arc-shaped magnet is positioned and mounted in the axial direction on the inner diameter side of the yoke. Positioning and mounting and fixing the arc-shaped magnet against the surface of the servo and the projection for positioning the arc-shaped magnet in the circumferential direction on the inner diameter side of the yoke, A set of one yoke, one ring-shaped spacer among the plurality of ring-shaped spacers, and a plurality of arc-shaped magnets positioned on the ring-shaped spacer are stacked in the axial direction of the yoke, The plurality of yokes stacked and stacked are welded or bonded, or are shrink-fitted using a second yoke that is slightly larger than the yoke to mechanically fix the yoke.
The invention according to claim 12 is provided with a mover that is a field, a stator that is an armature, and a stator support component that holds the stator. In a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the arc-shaped magnet has a predetermined skew angle. The arc magnet having the skew angle is fixed to the inner diameter side of the yoke.
A thirteenth aspect of the present invention includes a mover that is a field, a stator that is an armature, and a stator support component that holds the stator. In a cylindrical MM linear motor having a hollow cylindrical yoke and a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke, the two arc-shaped magnets adjacent in the circumferential direction on the inner diameter side of the yoke The assembly is fixed to the inner diameter side of the yoke with a predetermined step.

According to the invention described in any one of claims 1 to 3 and 6, the magnet can be easily placed in a predetermined position without complicated processing on the yoke, processing of a large number of holes, press-fitting of a pin, and use of a dedicated jig. Therefore, it is possible to reduce the assembly work time in the manufacturing process of the mover, improve the reliability or versatility of the mover, and further reduce the cost of the cylindrical MM linear motor itself.
According to the invention described in any one of the fourth, fifth, seventh and eighth aspects, the cogging torque (cogging thrust) can be easily reduced.
According to the invention of any one of claims 9 to 11, the magnet can be easily positioned at a predetermined position without performing complicated machining on the yoke, machining of a large number of holes, press-fitting of pins, and use of a dedicated jig. A cylindrical MM linear motor that can reduce assembly time in the manufacturing process of the mover, improve the reliability or versatility of the mover, and reduce the cost of the cylindrical MM linear motor itself The mover can be manufactured.
According to the invention of the twelfth or thirteenth aspect, it is possible to manufacture the movable element of the cylindrical MM linear motor that can easily reduce the cogging torque (cogging thrust).

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall schematic diagram of a cylindrical MM linear motor according to an embodiment of the present invention. In the figure, 1 is a mover and 2 is a stator. This cylindrical MM type linear motor is composed of a mover 1 as a field, a stator 2 as an armature, and a stator support component (not shown) for holding the stator 2. Moreover, the needle | mover 1 is fixed by the support components (for example, linear guide) which is not shown in figure.

FIG. 2 is a schematic diagram illustrating a method for manufacturing the mover 1 according to the first embodiment of the invention. In the figure, 3 is a yoke, 4 is a magnet, 5 is a ring spacer, and 6 is a protrusion. 1 includes a yoke 3, a magnet 4, and a ring-shaped spacer 5 (including protrusions 6).
First, a ring-shaped spacer 5 having a predetermined height and having a projection 6 is inserted into and fixed to the yoke 3 that is not processed on the inner diameter side of the hollow cylindrical shape.
Next, a predetermined number of arc-shaped magnets 4 magnetized in the radial direction are arranged between the projections 6 of the previously inserted ring-shaped spacer 5 and on the ring-shaped spacer 5. Adhering and fixing (adhesive is applied in advance to the magnet 4 on the surface to be bonded to the yoke 3). Here, the positioning of the magnet 4 in the axial direction is performed by mounting (abutting) the magnet 4 on the ring-shaped spacer 5, and the positioning in the circumferential direction is performed by contacting the protrusion 6 of the ring-shaped spacer 5. Achieved.
In addition, the insertion of the ring-shaped spacer 5 in the axial direction on the inner diameter side of the yoke 3 and the mounting (butting) of the magnet 4 on the ring-shaped spacer 5 are easily performed manually by an operator. However, depending on the axial length of the yoke 3, a dedicated jig may be used.
Next, as described above, the operation of inserting the ring spacer 5 again and arranging and fixing the magnet 4 is repeated, and the ring spacer 5 and the magnet 4 are alternately stacked in order from the back in the axial direction. 1 is manufactured.
Note that the ring-shaped spacer 5 is a non-magnetic material and is manufactured by cutting, lost wax, mold molding, or the like. The predetermined height of the ring-shaped spacer 5 and the interval between the protrusions 6 are determined in advance by the electromagnetic design of the cylindrical MM linear motor according to the embodiment of the present invention. Further, the movable element 1 in FIG. 1 is configured such that a combination of one ring-shaped spacer 5 among the plurality of ring-shaped spacers 5 and a plurality of arc-shaped magnets 4 positioned on the ring-shaped spacer 5 has an inner diameter of the yoke 3. The shape is stacked in the axial direction of the side.

FIG. 3 is a schematic view showing a method of manufacturing the mover 1 according to the second embodiment of the present invention, and FIG. 4 is an overall view of the holder in FIG. In the figure, 7 is a holder and 8 is a magnet holding part. 1 includes a yoke 3, a magnet 4, and a holder 7 (including a magnet holding portion 8). In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG.
The second embodiment is different from the first embodiment in that a holder 7 (including a magnet holding portion 8) is provided instead of the ring-shaped spacer 5 (including the protrusion 6) in the first embodiment.
First, a plurality of holders 7 each having a magnet holding portion 8 shown in FIG. 4 are inserted and fixed to a yoke 3 that is not machined on the inner diameter side of a hollow cylinder using a jig (not shown). If the jig (not shown) described above is not used, a simple process that can position and fix the holder 7 on the hollow cylindrical inner diameter side of the yoke 3 may be performed in advance.
Next, the arc-shaped magnet 4 magnetized in the radial direction is mounted between the magnet holding portions 8 of the holders 7 adjacent to each other in the circumferential direction of the previously inserted yoke 3 and on the magnet holding portion 8. Then, a predetermined number is arranged and bonded and fixed (adhesive is applied in advance to the bonding surface of the magnet 4 with the yoke 3). Here, the positioning of the magnet 4 in the axial direction is achieved by mounting (striking) the magnet 4 on the magnet holding unit 8, and the positioning in the circumferential direction is achieved by hitting the magnet holding unit 8. .
The mounting (butting) of the magnet 4 on the inner diameter side of the yoke 3 to the magnet holding portion 8 is easily performed manually by an operator, but depending on the axial length of the yoke 3. A dedicated jig may be used.
Next, as described above, the operation of arranging and fixing the magnets 4 is repeated, and the magnets 4 are stacked in order from the back in the axial direction and in the circumferential direction to manufacture the mover 1.
Note that the holder 7 is a non-magnetic material and is manufactured by cutting, lost wax, mold molding, or the like. Further, the height and interval of the magnet holding portion 8 in the holder 5 are determined in advance by the electromagnetic design of the cylindrical MM linear motor according to the embodiment of the present invention.

FIG. 5 is a schematic view showing a method of manufacturing the mover 1 according to the third embodiment of the present invention, and FIG. 6 is a schematic view showing a fixing method of the split yoke in FIG. In the figure, 9 is a split yoke and 10 is a second yoke. The mover 1 in FIG. 1 includes a divided yoke 9, a magnet 4, a ring-shaped spacer 5 (including protrusions 6), and a second yoke 10. In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG.
The third embodiment is different from the first embodiment in that a divided yoke 9 or a second yoke 10 is provided instead of the yoke 3 in the first embodiment.
First, a ring-shaped spacer 5 having a predetermined height and having a projection 6 is inserted in the axial direction of the divided yoke 9 with respect to the axially lowermost divided yoke 9 that is not processed on the inner diameter side of the hollow cylindrical shape. And fix.
Next, a predetermined number of arc-shaped magnets 4 magnetized in the radial direction are arranged between the projections 6 of the previously inserted ring-shaped spacer 5 and on the ring-shaped spacer 5. Adhering and fixing (adhesive is applied to the magnet 4 in advance on the adhesive surface with the divided yoke 9). Here, the positioning of the magnet 4 in the axial direction is performed by mounting (abutting) the magnet 4 on the ring-shaped spacer 5, and the positioning in the circumferential direction is performed by contacting the protrusion 6 of the ring-shaped spacer 5. Achieved.
In addition, the insertion of the ring-shaped spacer 5 in the axial direction on the inner diameter side of the divided yoke 9 and the mounting (butting) of the magnet 4 on the ring-shaped spacer 5 are easily performed manually by an operator. However, depending on the axial length of the divided yoke 9, a dedicated jig may be used.
Next, as described above, the operation of inserting the ring-shaped spacer 5 again to dispose and fix the magnet 4 to the divided yoke 9 at the next stage in the axial direction is repeated, and as shown in FIG. The divided yokes 9, the ring-shaped spacers 5, and the magnets 4 are sequentially stacked, and the divided yokes 9 are welded and bonded between the divided yokes 9, or by shrink fitting using a second yoke 10 that is slightly larger than the divided yokes 9. Is fixed mechanically and the mover 1 is manufactured.
Note that the ring-shaped spacer 5 is a non-magnetic material and is manufactured by cutting, lost wax, mold molding, or the like. The predetermined height of the ring-shaped spacer 5 and the interval between the protrusions 6 are determined in advance by the electromagnetic design of the cylindrical MM linear motor according to the embodiment of the present invention.

FIG. 7 is a schematic diagram illustrating a method for manufacturing the mover 1 according to the fourth embodiment of the invention. In the figure, 11 is a ring-shaped spacer whose plane portion is skewed, and 12 is a magnet whose plane portion is skewed. The mover 1 in FIG. 1 includes a yoke 3, a skewed magnet 12, and a skewed ring spacer 11. In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG. Moreover, since the manufacturing procedure of the needle | mover 1 in FIG. 1 is the same as that of Example 1, detailed description is abbreviate | omitted.
The difference between the fourth embodiment and the first embodiment is that a ring-shaped spacer 11 with a skew is provided instead of the ring-shaped spacer 5 in the first embodiment. Accordingly, instead of the magnet 4 in the first embodiment, It is a point provided with the magnet 12 with a skew.
In general, in a synchronous motor using a permanent magnet, the skew angle (diagonal angle) of the stator (stator) or rotor (mover) is effective to reduce the cogging torque (cogging thrust). Is known. In this embodiment, the degree of the skew angle may be determined as appropriate.

FIG. 8 is a schematic view illustrating a method of manufacturing the mover 1 according to the fifth embodiment of the invention. In the figure, 13 is a step, and 14 is a ring-shaped spacer with a step. 1 includes a yoke 3, a magnet 4, and a stepped ring spacer 14 (including a step 13 and a protrusion 6). In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG. Moreover, since the manufacturing procedure of the needle | mover 1 in FIG. 1 is the same as that of Example 1, detailed description is abbreviate | omitted.
The fifth embodiment is different from the first embodiment in that a ring-shaped spacer 14 with a step (including the step 13 and the protrusion 6) is provided instead of the ring-shaped spacer 5 in the first embodiment.
Here, the stepped ring spacer 14 is obtained by providing several steps 13 on the ring spacer 5 described in the first embodiment. By offsetting (shifting) the magnet 4 in the circumferential direction by the step 13, it is possible to expect the same effect (cogging thrust reduction) as the effect by the skew angle described above.
In addition, what is necessary is just to determine suitably how many steps 13 are provided in the circumferential direction. Further, with respect to the magnet 4 arranged in the circumferential direction on the inner diameter side of the yoke 3, the step 13 is provided for each two sets of the magnets 4 adjacent in the circumferential direction on the inner diameter side of the yoke 3, This is determined in advance by the electromagnetic design of the cylindrical MM linear motor according to the embodiment of the present invention.

FIG. 9 is a schematic view showing a method of manufacturing the mover 1 according to the sixth embodiment of the present invention, and FIG. 10 is an overall view of the holder (with skew) in FIG. In the figure, reference numeral 15 denotes a skew holder. 1 includes a yoke 3, a skewed magnet 12, and a skewed holder 15 (including a magnet holding portion 8). In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG. Moreover, since the manufacturing procedure of the needle | mover 1 in FIG. 1 is the same as that of Example 2, detailed description is abbreviate | omitted.
Example 6 differs from Example 2 in that instead of holder 7 (including magnet holding unit 8) in Example 2, a skewed holder 15 (including magnet holding unit 8) is provided. Instead of the magnet 4 in the second embodiment, a skewed magnet 12 is provided.
The effectiveness of reducing the cogging torque (cogging thrust) at the skew angle and the angle are as described in the fourth embodiment.

FIG. 11 is a schematic view showing a method of manufacturing the mover 1 according to the seventh embodiment of the present invention, and FIG. 12 is an overall view of the holder (with a step) in FIG.
In the figure, 16 is a stepped holder. 1 includes a yoke 3, a magnet 4, and a stepped holder 16 (including a magnet holding portion 8). In addition, since the thing of the same code | symbol attached | subjected in the figure mentioned above is the same thing or there exists the same effect, description is abbreviate | omitted. Also, the definitions of the axial direction, the circumferential direction, and the radial direction are the same as in FIG. Moreover, since the manufacturing procedure of the needle | mover 1 in FIG. 1 is the same as that of Example 2, detailed description is abbreviate | omitted.
A difference of the seventh embodiment from the second embodiment is that a holder 16 with a step (including the magnet holding portion 8) is provided instead of the holder 7 (including the magnet holding portion 8) in the second embodiment.
Here, the stepped holder 16 is obtained by making the left and right heights of the magnet holding portion 8 different from each other, and an effect similar to that of the fifth embodiment (cogging thrust reduction) can be expected.
In the case where adjacent magnets are not stepped, a holder 7 having no step can also be used.

  The ring-shaped spacer (no skew, with skew) and holder (no skew, with skew) described in the first to seventh embodiments have been described as components of the mover 1 in FIG. It may be possible to remove it later.

Overall schematic diagram of cylindrical MM linear motor according to an embodiment of the present invention Schematic which shows the manufacturing method of the needle | mover 1 which concerns on 1st Example of this invention. The manufacturing method of the needle | mover 1 which concerns on 2nd Example of this invention is shown. Overall view of the holder in FIG. 3 of the present invention The manufacturing method of the needle | mover 1 which concerns on 3rd Example of this invention is shown. Schematic showing the fixing method of the divided yoke in FIG. 5 of the present invention Schematic which shows the manufacturing method of the needle | mover 1 which concerns on 4th Example of this invention. Schematic which shows the manufacturing method of the needle | mover 1 which concerns on 5th Example of this invention. Schematic which shows the manufacturing method of the needle | mover 1 which concerns on 6th Example of this invention. Overall view of holder (with skew) in FIG. 9 of the present invention Schematic which shows the manufacturing method of the needle | mover 1 which concerns on 7th Example of this invention. Overall view of holder (with step) in FIG. 11 of the present invention The slope view of the movable magnet body in the first prior art FIG. 13 in the first prior art is an exploded perspective view excluding magnet pieces. Schematic of the magnet positioning jig in the second prior art Schematic diagram of magnet bonding in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable element 2 Stator 3 Yoke 4 Magnet 5 Ring-shaped spacer 6 Protrusion 7 Holder 8 Magnet holding part 9 Divided yoke 10 Second yoke 11 Ring-shaped spacer (with skew)
12 Magnet (with skew)
13 Step 14 Ring-shaped spacer (with step)
15 Holder (with skew)
16 Holder (with step)
17 Yoke 18 Magnet 19 Pin 20 Base jig 21 Shaft jig

Claims (13)

A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In the cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke,
The mover includes a plurality of ring-shaped spacers for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke;
A combination of one of the plurality of ring-shaped spacers and the plurality of arc-shaped magnets positioned on the ring-shaped spacer is stacked in the axial direction on the inner diameter side of the yoke. Cylindrical MM type linear motor.   2. The cylindrical MM linear motor according to claim 1, wherein the ring-shaped spacer has a protrusion for positioning the arc-shaped magnet in a circumferential direction on the inner diameter side of the yoke. The yoke is divided into a plurality of parts in the axial direction,
A set of one of the plurality of yokes, one ring-shaped spacer of the plurality of ring-shaped spacers, and a plurality of arc-shaped magnets positioned on the ring-shaped spacer, 2. The cylindrical MM linear motor according to claim 1, wherein the cylindrical MM linear motors are stacked in the axial direction of the yoke.   The ring-shaped spacer includes a step on a surface on which the arc-shaped magnet is positioned and mounted, and a protrusion for positioning the arc-shaped magnet in a circumferential direction on the inner diameter side of the yoke. 1. A cylindrical MM linear motor according to 1. The ring-shaped spacer has a skew angle on a surface on which the arc-shaped magnet is positioned and mounted;
2. The cylindrical MM linear motor according to claim 1, wherein the arc-shaped magnet has a skew angle on a surface positioned and mounted on the ring-shaped spacer. A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In the cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke,
The mover includes a plurality of holders having magnet holding portions for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke;
A cylindrical MM linear motor, wherein the plurality of holders are arranged at regular intervals in a circumferential direction on the inner diameter side of the yoke, and the arc-shaped magnet is positioned and mounted on the magnet holding portion. The cylindrical MM linear motor according to claim 6, wherein the holder has a step on a surface of the magnet holding portion on which the arc-shaped magnet is positioned and mounted. The holder has a skew angle on the surface of the magnet holding part for positioning and mounting the arc-shaped magnet,
The cylindrical MM linear motor according to claim 6, wherein the arc-shaped magnet has a skew angle on a surface positioned and mounted on the holder. A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In a method for manufacturing a mover of a cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of a yoke,
The mover includes a plurality of ring-shaped spacers for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke,
Inserting the ring spacer on the inner diameter side of the yoke;
The arc-shaped magnet is positioned on the surface of the ring-shaped spacer for positioning and mounting the arc-shaped magnet in the axial direction on the inner diameter side of the yoke, and the projection for positioning the arc-shaped magnet in the circumferential direction on the inner diameter side of the yoke. Attaching the magnet and positioning mounting and fixing,
A method of manufacturing a mover for a cylindrical MM linear motor, wherein the insertion of the ring-shaped spacer into the inner diameter side of the yoke and the positioning and mounting of the arc-shaped magnet on the ring-shaped spacer are repeated. . A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In a method for manufacturing a mover of a cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of a yoke,
The mover includes a plurality of holders having magnet holding portions for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke,
A plurality of the holders are arranged at regular intervals in the circumferential direction on the inner diameter side of the yoke,
The arc-shaped magnet is abutted against the surface of the magnet holding portion for positioning and mounting the arc-shaped magnet and the surface of the holder positioned in the circumferential direction on the inner diameter side of the yoke, and is mounted and bonded and fixed. The manufacturing method of the needle | mover of cylindrical MM type | mold linear motor. A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In a method for manufacturing a mover of a cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of a yoke,
The yoke is divided into a plurality of parts in the axial direction, and the mover includes a plurality of ring-shaped spacers for positioning the arc-shaped magnet in the axial direction and the circumferential direction on the inner diameter side of the yoke. There,
Inserting one of the plurality of ring-shaped spacers into the inner diameter side of one of the plurality of yokes;
The arc-shaped magnet is positioned on the surface of the ring-shaped spacer for positioning and mounting the arc-shaped magnet in the axial direction on the inner diameter side of the yoke, and the projection for positioning the arc-shaped magnet in the circumferential direction on the inner diameter side of the yoke. Attaching the magnet and positioning mounting and fixing,
A set of one yoke of the plurality of yokes, one ring-shaped spacer of the plurality of ring-shaped spacers, and a plurality of the arc-shaped magnets positioned on the ring-shaped spacer, Stacked in the axial direction of the yoke,
A cylindrical MM type linear motor characterized in that the plurality of divided yokes are welded or bonded, or are shrink-fitted using a second yoke that is slightly larger than the yoke to mechanically fix the yoke. A mover manufacturing method. A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In the cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke,
The arc-shaped magnet has a predetermined skew angle,
A cylindrical MM linear motor characterized in that the arc-shaped magnet having the skew angle is fixed to the inner diameter side of the yoke. A mover that is a field, a stator that is an armature, and a stator support component for holding the stator, wherein the mover is a hollow cylindrical yoke; In the cylindrical MM linear motor having a plurality of arc-shaped magnets fixed to the inner diameter side of the yoke,
A cylindrical MM linear motor characterized in that a set of two arc-shaped magnets adjacent in the circumferential direction on the inner diameter side of the yoke is fixed to the inner diameter side of the yoke with a predetermined step.

Images