CN203301334U - Magnet yoke assembling body - Google Patents
Magnet yoke assembling body Download PDFInfo
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- CN203301334U CN203301334U CN2013200411813U CN201320041181U CN203301334U CN 203301334 U CN203301334 U CN 203301334U CN 2013200411813 U CN2013200411813 U CN 2013200411813U CN 201320041181 U CN201320041181 U CN 201320041181U CN 203301334 U CN203301334 U CN 203301334U
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- yoke
- plate
- plates
- gap
- linear motor
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Abstract
The utility model provides a magnet yoke assembling body. With the magnet yoke assembling body adopted, the miniaturization and lightweight of a linear motor can be realized, and high output can be obtained. A linear motor (100) is provided with a magnetic yoke assembling body (30); a field magnet is adopted as a fixed part; an armature (3) is adopted as a movable part; and the field magnet and the armature (3) can move relatively. The linear motor (100) is provided with the magnetic yoke assembling body (30) with magnet columns (14); the magnetic yoke assembling body (30) is provided with two yoke plates (11) which are arranged oppositely, and a yoke fixing part (12) which supports the two yoke plates (11) at one side end portion (11a) of each yoke plate in a cantilever-beam form; and the clearance between the two yoke plates (11) is characterized in that the clearance at one end (11b) is larger than the clearnce at the other end (11a).
Description
Technical field
The linear motor that the disclosed execution mode of the utility model relates to the yoke assembly and possesses this yoke assembly.
Background technology
In patent documentation 1, put down in writing the linear motor of coreless.This linear motor possesses: yoke, and it replaces different a plurality of permanent magnets and forms by being adjacent to alignment arrangements magnetic; And the armature of coreless, itself and permanent magnet row separate ground, magnetic space arranged opposite, and a plurality of coil groups of utilizing the resin mold splenium will concentrate coiling to form are fixed, and have and be configured as flat armature coil, using any one party in yoke and armature as fixture, using the opposing party as movable piece, yoke and armature are relatively moved.
Patent documentation 1: TOHKEMY 2001-86726 communique
Above-mentioned linear motor has section and is the roughly yoke assembly of コ word shape, and described yoke assembly consists of two flat yokes and the yoke fixed head that is the described yoke of cantilever beam shape ground parallel support.Inboard in each yoke of yoke assembly, be fixed with a plurality of permanent magnets in the mode different from opposed permanent magnet polarity, and described a plurality of permanent magnets are configured in the different mode in alternating polarity ground on the direction that relatively moves.
In the linear motor of such formation, when in order to obtain high output, using the permanent magnet of brute force, due to the magnet attraction each other of arranged opposite, make the deflection increase of yoke, exist the possibility in the gap that can't guarantee movable piece and fixture.In order to reduce this deflection, need the wall thickness of thickening yoke to improve rigidity, the problem of difficulty but the miniaturization, the lightweight that exist motor become.
The utility model content
The utility model completes in view of such problem points just, and its purpose is, a kind of yoke assembly and the linear motor that can realize miniaturization and lightweight and can access high output is provided.
In order to solve above-mentioned problem, according to a viewpoint of the present utility model, a kind of yoke assembly is provided, described yoke assembly uses in linear motor, described linear motor is using any one party in field magnet and armature as movable piece and using the opposing party as fixture, and described field magnet and described armature can relatively move, wherein, described yoke assembly has: two yoke plates, described two yoke plate arranged opposite; And yoke fixed part, described yoke fixed part is described two yoke plates of cantilever beam shape ground supporting at a side end of described yoke plate, gap between described two yoke plates constitutes, and with the gap between a described side end, compares, and the gap between end side is larger.
In addition, described yoke assembly also has plate, and described plate is fastened on respectively the outside of described two yoke plates, and consists of the metal material different from described yoke plate.
In addition, in described yoke assembly, described yoke plate is processed to from a described side end towards the described end side shape of warpage laterally.
In addition, in described yoke assembly, described yoke plate is tabular, described yoke fixed part so that the gap between described two yoke plates form the mode large in the gap of the Gap-Ratios between described end side between a described side end by described two yoke plates supporting for expanding shape.
In addition, according to another viewpoint of the present utility model, a kind of yoke assembly is provided, described yoke assembly uses in linear motor, described linear motor is using any one party in field magnet and armature as movable piece and using the opposing party as fixture, and described field magnet and described armature can relatively move, and described yoke assembly is characterised in that, described yoke assembly has: two yoke plates, described two yoke plate arranged opposite; The yoke fixed part, described yoke fixed part is described two yoke plates of cantilever beam shape ground supporting at a side end of described yoke plate; And plate, described plate is fastened on respectively the outside of described two yoke plates, and described plate consists of the metal material different from described yoke plate.
In addition, in described yoke assembly, described plate consists of the coefficient of thermal expansion metal material larger than the coefficient of thermal expansion of described yoke plate.
In addition, in described yoke assembly, described plate consists of the coefficient of thermal expansion metal material less than the coefficient of thermal expansion of described yoke plate.
In addition, according to another viewpoint of the present utility model, a kind of linear motor is provided, described linear motor is using any one party in field magnet and armature as movable piece and using the opposing party as fixture, described field magnet and described armature can relatively move, described linear motor is characterised in that, described field magnet has: above-mentioned yoke assembly; And a plurality of permanent magnets, described a plurality of permanent magnet is separately positioned on the inboard of the yoke plate of two arranged opposite that described yoke assembly has, described a plurality of permanent magnet is configured to, and polarity is alternately different on described moving direction, and different from opposed magnet polarity.
According to the utility model, can realize miniaturization and the lightweight of linear motor and obtain high output.
The accompanying drawing explanation
Fig. 1 means the stereogram of the outward appearance of the linear motor that an execution mode relates to.
Fig. 2 is the front view of the linear motor observed from the arrow A direction Fig. 1, is the figure that a part of cutting movable piece open represents section.
Before Fig. 3 (a) and Fig. 3 (b) mean the installation of permanent magnet and the front view of the yoke assembly after installing.
Before Fig. 4 (a) and Fig. 4 (b) mean yoke plate itself are processed into to the installation of the permanent magnet in the variation of warped shapes in advance and the front view of the yoke assembly after installing.
Fig. 5 (a) and Fig. 5 (b) mean that the yoke plate of warped shapes utilizes the bending machining method that stack realizes and utilizes the key diagram of the filing that grinding machine etc. realizes.
Fig. 6 (a) and Fig. 6 (b) mean before the installation that utilizes the yoke fixed part yoke plate to be supported to the permanent magnet in the variation that expands shape and the front view of the yoke assembly after installing.
Fig. 7 (a), Fig. 7 (b) and Fig. 7 (c) are in the variation of the little plate of the outside of yoke plate laminating coefficient of thermal expansion, before the installation of permanent magnet, install after, before the driving of linear motor and the front view of the yoke assembly after the driving of linear motor.
Label declaration
1: fixture;
2: movable piece;
3: armature;
11: yoke plate;
12: the yoke fixed part;
12A: yoke fixed part;
13: permanent magnet;
14: the permanent magnet row;
15: plate;
16: plate;
30: the yoke assembly;
30A: yoke assembly;
30B: yoke assembly;
30C: yoke assembly;
100: linear motor.
Embodiment
Below, illustrate referring to the drawings an execution mode.
The structure of<linear motor >
As depicted in figs. 1 and 2, the linear motor 100 that relates to of present embodiment possesses as the fixture 1 of field magnet and has the movable piece 2 of armature 3.Fixture 1 has two yoke plates 11, yoke fixed part 12, a plurality of permanent magnet 13 and plate 15.Two yoke plates 11 are respectively the flat board of same rectangular essentially rectangular shape, and described two yoke plates 11 configure in the mutual opposed mode of the length direction at fixture 1.The section shape of yoke fixed part 12 on the Width of fixture 1 is U font roughly, and be arranged on whole length direction scope, described yoke fixed part 12 will couple together between a side of two yoke plates 11 (being lower side in Fig. 1 and Fig. 2) end, thereby is cantilever beam shape ground supporting yoke plate 11.
A plurality of permanent magnets 13 consist of the flat board of the shorter essentially rectangular shape of the length direction at fixture 1 respectively, and two one group ground arranged opposite is in each yoke plate 11 opposed faces each other.Many groups permanent magnet 13 like this with the predetermined setting that is spaced, that is, is respectively equipped with permanent magnet row 14 alongst at the medial surface of each yoke plate 11 along the length direction of fixture 1.On the same group opposed two permanent magnets 13 magnetic pole each other towards the opposed direction at them, be opposite on the Width of fixture 1, and adjacent two permanent magnets 13 magnetic pole each other of the length direction of fixture 1 towards also reverse each other.
And, at the upper surface of yoke fixed part 12, spreading all over length direction and be formed with slot part 12a, the width of this slot part 12a is set to, and is roughly the same with the opposed size of space of above-mentioned one group of permanent magnet 13.Therefore, as shown in Fig. 3 (a) and Fig. 3 (b), from the roughly U font that is shaped as of top view fixture 1 integral body.
As shown in Figure 2, movable piece 2 has armature pedestal 21, printed base plate 22, a plurality of armature coil 24 and mold pressing resin 25.Armature pedestal 21 constitutes roughly rectangular shape, and the length of the Length Ratio fixture 1 of its length direction is short.Printed base plate 22 is thin plates of the essentially rectangular shape that length is identical with above-mentioned armature pedestal 21, at described printed base plate 22, is printed with for respectively to the distribution of above-mentioned a plurality of armature coil 24 supply capabilities.Armature coil 24 is that the hollow type is concentrated the coreless coil of reeling.Each armature coil 24 utilizes mold pressing resin 25 to be fixed in printed base plate 22.
As shown in Figure 2, utilize mold pressing resin 25 that a plurality of armature coils 24 are fixed on to the integral body that a surface of printed base plate 22 forms and form armature 3, this is roughly inserted and be fixed in the slot part 21a of lower surface of above-mentioned armature pedestal 21 and the integral body formation movable piece 2 that obtains in the top of tabular armature 3.And, at the armature 3 of the downside that will be located at movable piece 2, be inserted under the state between two row permanent magnet row 14 of fixture 1, form the linear motor 100 of coreless.In addition, the structure of armature 3 is not limited to said structure, for example also can be at the both sides of printed base plate 22 configuration armature coil 24.
The structure of<yoke assembly >
As shown in Fig. 3 (a) and Fig. 3 (b), above-mentioned two yoke plates 11, yoke fixed part 12 and plate 15 form yoke assembly 30.By permanent magnet 13 being utilized bonding grade be fixed in this yoke assembly 30, thereby be assembled into fixture 1.Plate 15 is and yoke plate 11 plate of metal of the same race not as mentioned above, and it adopts than the large metal material of yoke plate 11 coefficient of thermal expansions, such as at yoke plate 11, being that situation lower plate 15 made of iron adopts aluminium etc.Two yoke plates 11 that are fastened with plate 15 by high temperature when reaching normal temperature with from a side (downside Fig. 3 (a)) end 11a towards opposite side (upside in Fig. 3 (a)) the end 11b mode bending of warpage laterally.Thus, the gap between two yoke plates 11 forms, and is large in the gap of the Gap-Ratios between end side 11b between a side end 11a.The difference in this gap is for example about a few tenths of a mm, but in Fig. 3 (a), in order easily to understand, the difference in gap is amplified significantly to diagram (below figure be also same).Consequently, yoke assembly 30 is from the shape that expands that is shaped as roughly コ word shape that open side broadens of top view.
Can consider multiplely by plate 15 fastening method with yoke plate 11, for example consider following method: make plate 15 and yoke plate 11 overlapping, under this state, at high temperature utilize stack to apply high pressure plate 15 and yoke plate 11 and roll.Thus, combination between the metal structure generation atom of the metal structure of plate 15 and yoke plate 11, engage thereby form the yoke plate 11 that plate 15 is arranged.In addition, also plate 15 and yoke plate 11 can be passed through to solder joints.After this, when joint being had to yoke plate 11 cool to room temperature of plate 15, the large plate 15 of coefficient of thermal expansion is with the ratio thermal contraction larger than yoke plate 11, and therefore, yoke plate 11 and plate 15 are deformed into the shape of warpage laterally.
The effect of<execution mode >
The yoke assembly 30 of present embodiment has the plate 15 in the outside that is anchored on respectively two yoke plates 11.Plate 15 consists of the coefficient of thermal expansion metal material larger than yoke plate 11.Yoke assembly 30 utilizes two yoke plate 11 buckling deformations laterally of official post of the coefficient of thermal expansion of yoke plate 11 and plate 15, gap between two yoke plates 11 is constituted, with the gap between a side end 11a who disposes yoke fixed part 12, compare, the gap between end side 11b is larger.
Like this, by yoke assembly 30 being pre-formed for expanding shape, after permanent magnet 13 is installed, can utilize its attraction to make two gap constants between yoke plate 11.Therefore, even permanent magnet 13 adopts in the situation of powerful magnet, also can adopt the yoke plate 11 that rigidity is low and wall is thinner, therefore can realize miniaturization and the lightweight of linear motor 100 and obtain high output.
<variation >
In addition, the utility model is not limited to above-mentioned execution mode, can in the scope that does not break away from its purport and technological thought, carry out various distortion.Below, such variation is appended to explanation successively.
(1) yoke plate itself is processed in advance to the situation of warped shapes
In the above-described embodiment, at high temperature the plate 15 of the metal material that coefficient of thermal expansion is larger than the coefficient of thermal expansion of yoke plate 11 is fastening and be fitted in the outside of yoke plate 11, the official post yoke plate 11 of the coefficient of thermal expansion while then utilizing cool to room temperature is deformed into the shape of warpage laterally, but also can in advance yoke plate 11 itself be processed into to the shape of warpage laterally by plastic working etc.Fig. 4 (a) and Fig. 4 (b) illustrate an example of the yoke assembly of this variation.
As shown in Figure 4 (a), yoke assembly 30A consists of two yoke plates 11 and the yoke fixed part 12 that is a side end 11a of the described yoke plate 11 of cantilever beam shape ground supporting.It is that a side end 11a is the end side 11b shape of warpage laterally towards open side that two yoke plates 11 form from the fixed part side by machining in advance.
As shown in Figure 4 (b), after the opposed faces at two yoke plates 11 is installed permanent magnet 13, thus two yoke plates 11 by the attraction between permanent magnet 13 with from fixation side namely a side end 11a towards open side be end side 11b to the inside the warpage mode of restoring be out of shape.Consequently, the gap between two yoke plates 11 forms: the poor of the gap between end side 11b and the gap between a side end 11a, disappear, and the gap constant of two yoke plates 11 (that is, almost parallel).
As the processing of yoke plate 11, such as cut or other processing that can adopt the bending machining that realized by stack, be realized by grinding machine etc.For example, in the bending machining of utilizing stack to realize, as shown in Fig. 5 (a), stack 31 along a plurality of up and down of curved shape configuration of the warpage of the expection of yoke plate 11, thereby between the stack 31 by up and down, stretch, roll successively bending gradually, the yoke plate 11 that raw material 11A plastic working is become to have to the warpage of expection by the raw material 11A that makes yoke plate 11.In addition, for example in cut, as shown in Fig. 5 (b), the raw material 11A with cutting yoke plates 11 such as grinding machines, cut out the yoke plate 11 of the warpage with expection from raw material 11A.
In this variation, the yoke plate 11 of yoke assembly 30A is processed into the shape of warpage laterally in advance.Thus, even, in the situation that the permanent magnet 13 of field magnet 14 adopts powerful magnet, also can adopt the yoke plate 11 that rigidity is low and wall is thinner.And, can realize miniaturization and the lightweight of linear motor 100 and obtain high output.
(2) utilize the yoke fixed part yoke plate to be supported to the situation that expands shape
In the above-described embodiment, yoke plate 11 is formed to the shape of warpage, but can be also, yoke plate 11 itself is formed to tabular, the shape of the yoke fixed part 12 of supporting yoke plate 11 be formed to inverted roughly trapezoidal shape the yoke assembly is formed and expands shape.Fig. 6 (a) and Fig. 6 (b) illustrate an example of this variation.
As shown in Figure 6 (a), yoke assembly 30B consists of two flat yoke plates 11 and the yoke fixed part 12A that is a side end 11a of the described yoke plate 11 of cantilever beam shape ground supporting.The section shape of the Width of yoke fixed part 12A forms upper base than the shape of the long inverted antiparallelogram of going to the bottom, and the side that has up in the Width both sides and tilt laterally.Two yoke plates 11 are by the side support of the inclination of the both sides of yoke fixed part 12A, thereby expand towards the end side 11b of open side from a side end 11a who is supported by yoke fixed part 12A linearlyly.
As shown in Figure 6 (b), after the opposed faces at two yoke plates 11 is installed permanent magnet 13, two yoke plates 11 by the attraction between permanent magnet 13 with from fixation side namely a side end 11a towards open side be end side 11b to the inside the mode of warpage be out of shape.Thus, the gap between two yoke plates 11 forms: the poor of the gap between end side 11b and the gap between a side end 11a, disappear, and the gap constant of two yoke plates 11 (that is, almost parallel).Therefore, even permanent magnet 13 adopts in the situation of powerful magnet, also can adopt the yoke plate 11 that rigidity is low and wall is thinner, therefore can realize miniaturization and the lightweight of linear motor 100 and obtain high output.
(3) in the situation of the little plate of the outside of yoke plate laminating coefficient of thermal expansion
In the above-described embodiment, plate 15 at the large metal material of the outside of yoke plate 11 laminating coefficient of thermal expansion, make because of the difference of the coefficient of thermal expansion with plate 15 laterally the attraction of the permanent magnet 13 of the opposed faces of two yoke plates 11 by being arranged on them of warpage with the mode of restoring warpage to the inside, thereby make the clearance constant of two yoke plates 11.On the other hand, can be also, plate at the little metal material of the outside of yoke plate 11 laminating coefficient of thermal expansion, under heating temp while making by the attraction between the permanent magnet of installing in opposed faces to the inside the driving of two of warpage yoke plates 11 at linear motor 100 because of the difference of the coefficient of thermal expansion with plate with the mode of restoring warpage laterally, thereby when driving, make the clearance constant of two yoke plates 11.Fig. 7 (a), Fig. 7 (b) and Fig. 7 (c) illustrate an example of the yoke assembly of this variation.
As shown in Figure 7 (a), yoke assembly 30C possesses: two yoke plates 11; The yoke fixed part 12 that is a side end 11a of the described yoke plate 11 of cantilever beam shape ground supporting; And the plate 16 of not metal of the same race that is anchored on the outside of two yoke plates 11.
Then, movable piece 2 is assembled in to fixture 1, and forms linear motor 100, when armature 3 energising to movable piece 2, linear motor 100 drives, and the temperature of linear motor 100 rises.Thus, yoke plate 11 expands with the ratio larger than plate 16 because of the difference of expansion rate, and yoke plate 11 is out of shape in the mode of warpage laterally, thereby and the deflection that is caused by the attraction between permanent magnet 13 offset.Consequently, as shown in Fig. 8 (c), can make two yoke plates 11 restore the tabular to almost parallel.
Like this, when the stopping of linear motor 100 (under normal temperature), the magnetic space of field magnet and armature 3 is in less state, and (under high temperature) can be held in the magnetic space preferred gap when driving, and therefore in the linear motor of for example Continuous Drive, can improve the stability of driving.
(4) other
In addition, in above execution mode and variation, for linear motor 100, take field magnet as fixed part and the situation that armature 3 forms as movable part is illustrated as example, but also can constitute using field magnet as movable part and armature 3 as the linear motor 100 of fixed part.
In addition, except the above content of having narrated, also can appropriate combination based on the gimmick of the respective embodiments described above and each variation.
In addition, although there is no illustration one by one, can in the scope that does not break away from its purport, apply various changes ground and implement.
Claims (4)
1. yoke assembly, described yoke assembly uses in linear motor, described linear motor is using any one party in field magnet and armature as movable piece and using the opposing party as fixture, and described field magnet and described armature can relatively move, described yoke assembly is characterised in that
Described yoke assembly has:
Two yoke plates, described two yoke plate arranged opposite; And
The yoke fixed part, described yoke fixed part is described two yoke plates of cantilever beam shape ground supporting at a side end of described yoke plate,
Gap between described two yoke plates constitutes, and with the gap between a described side end, compares, and the gap between end side is larger.
2. yoke assembly according to claim 1, is characterized in that,
Described yoke assembly also has plate, and described plate is fastened on respectively the outside of described two yoke plates, and consists of the metal material different from described yoke plate.
3. yoke assembly according to claim 1, is characterized in that,
Described yoke plate is processed to from a described side end towards the described end side shape of warpage laterally.
4. yoke assembly according to claim 1, is characterized in that,
Described yoke plate is tabular,
Described yoke fixed part so that the gap between described two yoke plates form the mode large in the gap of the Gap-Ratios between described end side between a described side end by described two yoke plates supporting for expanding shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012096871A JP5652669B2 (en) | 2012-04-20 | 2012-04-20 | Field yoke assembly and linear motor |
| JP2012-096871 | 2012-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203301334U true CN203301334U (en) | 2013-11-20 |
Family
ID=49577317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200411813U Expired - Fee Related CN203301334U (en) | 2012-04-20 | 2013-01-25 | Magnet yoke assembling body |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5652669B2 (en) |
| CN (1) | CN203301334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733205A (en) * | 2017-11-27 | 2018-02-23 | 南方电机科技有限公司 | A kind of magneto and the equipment including the motor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61191258A (en) * | 1985-02-20 | 1986-08-25 | Hitachi Metals Ltd | Dihedral linear pulse motor |
| JPS6477843A (en) * | 1987-09-18 | 1989-03-23 | Hitachi Ltd | Shadow mask composition |
| JPH09308018A (en) * | 1996-05-20 | 1997-11-28 | Shinko Electric Co Ltd | Linear driver |
| JPH1118405A (en) * | 1997-06-20 | 1999-01-22 | Yaskawa Electric Corp | Linear motor |
| JP2007293083A (en) * | 2006-04-26 | 2007-11-08 | Kyocera Mita Corp | Fixing device and image forming apparatus |
| JP5088536B2 (en) * | 2007-03-29 | 2012-12-05 | 日立金属株式会社 | Assembly method of moving coil type linear motor |
-
2012
- 2012-04-20 JP JP2012096871A patent/JP5652669B2/en not_active Expired - Fee Related
-
2013
- 2013-01-25 CN CN2013200411813U patent/CN203301334U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733205A (en) * | 2017-11-27 | 2018-02-23 | 南方电机科技有限公司 | A kind of magneto and the equipment including the motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013225986A (en) | 2013-10-31 |
| JP5652669B2 (en) | 2015-01-14 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20170125 |