JP5629467B2

JP5629467B2 - Linear synchronous motor

Info

Publication number: JP5629467B2
Application number: JP2010006276A
Authority: JP
Inventors: 玉▲棋▼ 唐; 聡杉田
Original assignee: Sanyo Denki Co Ltd
Current assignee: Sanyo Denki Co Ltd
Priority date: 2010-01-14
Filing date: 2010-01-14
Publication date: 2014-11-19
Anticipated expiration: 2030-01-14
Also published as: JP2011147275A

Description

本発明は、可動子が直線運動するリニア同期モータに関するものである。 The present invention relates to a linear synchronous motor in which a mover moves linearly.

固定子に対して可動子が往復運動するリニア同期モータが知られている。固定子及び可動子の一方は、永久磁石支持体に取り付けられた複数の永久磁石からなる１以上の永久磁石列を有する永久磁石列ユニットを備えている。固定子及び可動子の他方は、永久磁石列と所定の間隙を介して対向する磁極面を有する複数の磁極部及び複数の磁極部を磁気的に連結するヨークを有し、複数の磁極部が軸線方向に間隔をあけて配置されてなるコアユニットと、複数の磁極部を励磁する複数の励磁巻線とを有する電機子ユニットを備えている。この種のリニア同期モータでは、電機子ユニットの大きさを小さくして、トルクを高めることが求められている。そこで、特開平１１−１５５２７７号公報（特許文献１）に示すように、磁極部を磁極部本体と、磁極部本体に取り付けられて磁極面を有するリング形状の磁極面構成体とから構成することが提案された。この磁極面構成体は、磁極部本体よりも軸線方向両側に突出する部分（いわゆる顎部）を有している。このリニア同期モータでは、磁極部本体の軸線方向の厚み寸法を小さくしても、磁極面構成体の顎部により、磁極面を大きくすることができる。そのため、電機子ユニットの大きさを小さくして、トルクを高めることができる。また、顎部の大きさを調整することにより、コギングトルクを減少させることもできる。 A linear synchronous motor in which a movable element reciprocates with respect to a stator is known. One of the stator and the mover includes a permanent magnet row unit having one or more permanent magnet rows made of a plurality of permanent magnets attached to the permanent magnet support. The other of the stator and the mover has a plurality of magnetic pole portions having magnetic pole faces facing the permanent magnet array with a predetermined gap, and a yoke for magnetically connecting the plurality of magnetic pole portions, and the plurality of magnetic pole portions are An armature unit having a core unit arranged at intervals in the axial direction and a plurality of exciting windings for exciting a plurality of magnetic pole portions is provided. In this type of linear synchronous motor, it is required to increase the torque by reducing the size of the armature unit. Therefore, as shown in Japanese Patent Application Laid-Open No. 11-155277 (Patent Document 1), the magnetic pole part is composed of a magnetic pole part body and a ring-shaped magnetic pole surface structure attached to the magnetic pole part body and having a magnetic pole surface. Was proposed. This magnetic pole surface structure has portions (so-called jaws) that protrude on both sides in the axial direction from the magnetic pole body. In this linear synchronous motor, even if the thickness dimension in the axial direction of the magnetic pole part main body is reduced, the magnetic pole face can be enlarged by the jaw part of the magnetic pole face constituting body. Therefore, it is possible to increase the torque by reducing the size of the armature unit. Further, the cogging torque can be reduced by adjusting the size of the jaw.

特開平１１−１５５２７７号公報JP-A-11-155277

このような従来のリニア同期モータの磁極面構成体は、リング形状の磁極面構成体の周方向に溝を設け、この溝を磁極部本体の先端に嵌合させている。そのため、リング形状の磁極面構成体が周方向に動いてしまうという問題があった。 Such a conventional magnetic pole surface structure of a linear synchronous motor is provided with a groove in the circumferential direction of the ring-shaped magnetic pole surface structure, and this groove is fitted to the tip of the magnetic pole part body. For this reason, there is a problem that the ring-shaped magnetic pole surface structure moves in the circumferential direction.

本発明の目的は、磁極面構成体が周方向に動くのを防ぐことができるリニア同期モータを提供することにある。 The objective of this invention is providing the linear synchronous motor which can prevent that a magnetic pole surface structure moves to the circumferential direction.

本発明の他の目的は、上記目的に加えて、中間環状磁極部とヨーク構成体とを簡単に連結することができるリニア同期モータを提供することにある。 Another object of the present invention is to provide a linear synchronous motor capable of easily connecting an intermediate annular magnetic pole portion and a yoke structure in addition to the above object.

本発明の他の目的は、上記目的に加えて、従来よりも軸線方向の寸法を短くすることができ、リニア軸受に注入した潤滑油が環状磁極部の磁極面周囲や直動軸周辺に配置された部材に付着するのを防止できるリニア同期モータを提供することにある。 Another object of the present invention is that, in addition to the above object, the axial dimension can be made shorter than before, and the lubricating oil injected into the linear bearing is arranged around the magnetic pole surface of the annular magnetic pole portion and around the linear motion shaft. Another object of the present invention is to provide a linear synchronous motor that can prevent adhesion to a formed member.

本発明のリニア同期モータは、可動子と固定子とを具備している。可動子は、軸線方向に往復移動する直動軸及び該直動軸に取り付けられた複数の永久磁石からなる１以上の永久磁石列を備えている。固定子は、可動子の永久磁石列と所定の間隙を介して対向する磁極面を有し且つ直動軸の周囲を囲むように直動軸と同心的に配置される複数の環状磁極部及び該複数の環状磁極部を磁気的に連結するヨークを有し、複数の環状磁極部が軸線方向に間隔をあけて配置されてなるコアユニットと、複数の環状磁極部を励磁する複数の励磁巻線とを備えている。コアユニットの複数の環状磁極部は、一対の被連結部分を備えている。複数の環状磁極部は、一対の被連結部分が直動軸に沿って所定の間隔をあけて並んで一対の被連結部分列を構成するように配置されている。複数の環状磁極部は、軸線方向の両端に位置する一対の端部環状磁極部と、一対の端部環状磁極部の間に位置する１以上の中間環状磁極部とからなる。ヨークは、導磁性材料により形成され、一対の被連結部分列をそれぞれ構成する複数の被連結部分の全てを磁気的に連結する一対のヨーク構成体を備えている。なお、ここでいう「導磁性材料」とは、収束した磁束の流れを形成しやすい材料である。複数の環状磁極部の全部または軸線方向の両端に位置する一対の端部環状磁極部を除く１以上の中間環状磁極部は、環状の磁極部本体と、磁極部本体に取り付けられて磁極面を有する磁極面構成体とから構成されている。磁極面構成体は、帯状磁性板の長手方向の両端部が対向し且つ両端部間に分離部を有するリング形状に、帯状磁性板が曲げ加工されて構成されている。磁極面構成体は、分離部を構成する両端部間の間隔を広げる方向の力を利用して、磁極部本体に嵌合されている。磁極面構成体の軸線方向の寸法は、磁極部本体の軸線方向の寸法よりも大きい。磁極部本体には磁極面構成体が取り付けられる複数の被取付部が磁極部本体の周方向に間隔をあけて形成され、磁極面構成体には複数の被取付部に取り付けられる複数の取付部が形成されている。磁極面構成体が磁極部本体に嵌合されるときに、複数の被取付部と複数の取付部とがそれぞれ嵌合する。 The linear synchronous motor of the present invention includes a mover and a stator. The mover includes a linear motion shaft that reciprocates in the axial direction, and one or more permanent magnet rows that include a plurality of permanent magnets attached to the linear motion shaft. The stator has a plurality of annular magnetic pole portions having a magnetic pole surface facing the permanent magnet row of the mover with a predetermined gap and arranged concentrically with the linear motion shaft so as to surround the periphery of the linear motion shaft; A core unit having a yoke for magnetically connecting the plurality of annular magnetic pole portions, and having a plurality of annular magnetic pole portions arranged at intervals in the axial direction, and a plurality of excitation windings for exciting the plurality of annular magnetic pole portions With a line. The plurality of annular magnetic pole portions of the core unit includes a pair of connected portions. The plurality of annular magnetic pole portions are arranged such that a pair of connected portions are arranged at a predetermined interval along the linear motion axis to form a pair of connected portion rows. The plurality of annular magnetic pole portions include a pair of end annular magnetic pole portions located at both ends in the axial direction and one or more intermediate annular magnetic pole portions located between the pair of end annular magnetic pole portions. The yoke is formed of a magnetically conductive material, and includes a pair of yoke structures that magnetically connect all of the plurality of connected portions that respectively constitute the pair of connected portion rows. The “magnetically conductive material” here is a material that easily forms a converged magnetic flux flow. One or more intermediate annular magnetic pole portions excluding the whole of the plurality of annular magnetic pole portions or the pair of end annular magnetic pole portions located at both ends in the axial direction are attached to the annular magnetic pole portion body and the magnetic pole portion body. And a magnetic pole face structure. The magnetic pole surface structure is configured by bending a belt-like magnetic plate into a ring shape in which both ends in the longitudinal direction of the belt-like magnetic plate face each other and a separation portion is provided between both ends. The magnetic pole surface constituting body is fitted to the magnetic pole part main body by using a force in a direction to widen the distance between both end parts constituting the separating part. The dimension of the magnetic pole surface constituting body in the axial direction is larger than the dimension of the magnetic pole part body in the axial direction. The magnetic pole part body is formed with a plurality of attached parts to which the magnetic pole surface structure is attached at intervals in the circumferential direction of the magnetic pole part body, and the magnetic pole surface structure has a plurality of attachment parts attached to the plurality of attached parts. Is formed. When the magnetic pole surface constituting body is fitted to the magnetic pole part main body, the plurality of attached parts and the plurality of attachment parts are respectively fitted.

本発明のように、複数の被取付部と複数の取付部とを磁極部本体の周方向に間隔をあけて形成すると、複数の被取付部と複数の取付部との嵌合により、磁極面構成体が磁極部本体に対して周方向に動くのを防ぐことができる。また、帯状磁性板を曲げ加工してリング形状の磁極面構成体を形成するので、磁極面構成体を簡単に形成できる。 When the plurality of attachment portions and the plurality of attachment portions are formed at intervals in the circumferential direction of the magnetic pole portion body as in the present invention, the magnetic pole surface is formed by fitting the plurality of attachment portions and the plurality of attachment portions. The structure can be prevented from moving in the circumferential direction with respect to the magnetic pole part body. Further, since the ring-shaped magnetic pole surface structure is formed by bending the belt-shaped magnetic plate, the magnetic pole surface structure can be easily formed.

また、本発明では、複数の環状磁極部に一対の被連結部分を設け、該一対の被連結部分に連結される一対のヨーク構成体からヨークを構成するので、複数の環状磁極部を磁気的に連結するヨークの構成を単純なものにできる。 In the present invention, a pair of connected portions are provided on the plurality of annular magnetic pole portions, and the yoke is composed of a pair of yoke components connected to the pair of connected portions. It is possible to simplify the configuration of the yoke connected to the.

一対のヨーク構成体は、一対の被連結部分列をそれぞれ構成する複数の被連結部分を接続する一対の磁性筒体によって構成することができる。この場合、一対の磁性筒体の内部にそれぞれリニア軸受が配置する。リニア軸受には一対のガイド軸がスライド可能に支持する。直動軸の一端及び一対のガイド軸のそれぞれの一端を第１の連結部材に連結し、直動軸の他端及び一対のガイド軸のそれぞれの他端を第２の連結部材に連結する。ここでいう「リニア軸受」とは、軸を被支持部に対して軸線方向に往復移動可能に支持するリニアガイド等の軸受である。このようにすれば、第１及び第２の連結部材によって連結された一対のガイド軸を一対のリニア軸受に支持させるので、直動軸をコアユニットの両端で支持する必要がない。そのため、リニア同期モータの軸線方向の長さを従来よりも短くすることができる。また、直動軸から離れた位置において、可動子の一対のガイド軸がリニア軸受を介してスライド可能に支持されることになるため、可動子を支持するリニア軸受に潤滑油を注入しても、潤滑油が環状磁極部の磁極面周囲や直動軸周辺の部材に付着するのを防止できる。 The pair of yoke structural bodies can be configured by a pair of magnetic cylinders that connect a plurality of coupled parts that respectively constitute a pair of coupled part rows. In this case, linear bearings are respectively arranged inside the pair of magnetic cylinders. A pair of guide shafts are slidably supported on the linear bearing. One end of the linear motion shaft and one end of each of the pair of guide shafts are connected to the first connection member, and the other end of the linear motion shaft and each of the other ends of the pair of guide shafts are connected to the second connection member. Here, the “linear bearing” is a bearing such as a linear guide that supports the shaft so as to be reciprocally movable in the axial direction with respect to the supported portion. In this way, since the pair of guide shafts connected by the first and second connecting members are supported by the pair of linear bearings, it is not necessary to support the linear motion shaft at both ends of the core unit. Therefore, the length of the linear synchronous motor in the axial direction can be made shorter than before. In addition, since the pair of guide shafts of the mover is slidably supported via the linear bearing at a position away from the linear motion shaft, lubricating oil is injected into the linear bearing that supports the mover. Further, it is possible to prevent the lubricating oil from adhering to members around the magnetic pole surface of the annular magnetic pole portion and around the linear motion shaft.

本発明では、複数の環状磁極部とヨークとを別々に形成しているため、１以上の中間環状磁極部は、所定の形状の複数枚の磁性鋼板を軸線方向に積層して構成することができる。このため、従来のように導磁性材料に切削加工を施して全ての環状磁極部を形成する場合に比べて、固定子の製造コストを低くできる。また、コアユニット内で発生する磁気損失及び鉄損を小さくすることができる。 In the present invention, since the plurality of annular magnetic pole portions and the yoke are separately formed, the one or more intermediate annular magnetic pole portions can be configured by laminating a plurality of magnetic steel plates having a predetermined shape in the axial direction. it can. For this reason, the manufacturing cost of a stator can be made low compared with the case where all the magnetic pole parts are formed by cutting a magnetic conducting material as in the prior art. Moreover, the magnetic loss and iron loss which generate | occur | produce in a core unit can be made small.

また、本発明は、固定子に対して可動子が軸線方向に往復運動をするように構成されているリニア同期モータを改良の対象とする。固定子及び可動子の一方は、永久磁石支持体に取り付けられた複数の永久磁石からなる１以上の永久磁石列を有する永久磁石列ユニットを備えている。固定子及び可動子の他方は、永久磁石列と所定の間隙を介して対向する磁極面を有する複数の環状磁極部及び複数の環状磁極部を磁気的に連結するヨークを有し、複数の環状磁極部が軸線方向に間隔をあけて配置されてなるコアユニットと、複数の環状磁極部を励磁する複数の励磁巻線とを有する電機子ユニットを備えている。複数の環状磁極部は、軸線方向の両端に位置する一対の端部環状磁極部と、一対の端部環状磁極部の間に位置する１以上の中間環状磁極部とからなる。複数の環状磁極部の全部または軸線方向の両端に位置する一対の端部環状磁極部を除く１以上の中間環状磁極部は、環状の磁極部本体と、磁極部本体に取り付けられて磁極面を有する磁極面構成体とから構成される。磁極面構成体の軸線方向の寸法は、磁極部本体の軸線方向の寸法よりも大きい。磁極部本体には磁極面構成体が取り付けられる複数の被取付部が磁極部本体の周方向に間隔をあけて形成され、磁極面構成体には複数の被取付部に取り付けられる複数の取付部が形成されている。磁極面構成体が磁極部本体に嵌合されるときに、複数の被取付部と複数の取付部とがそれぞれ嵌合する。 Further, the present invention aims to improve a linear synchronous motor configured such that the movable element reciprocates in the axial direction with respect to the stator. One of the stator and the mover includes a permanent magnet row unit having one or more permanent magnet rows made of a plurality of permanent magnets attached to the permanent magnet support. The other of the stator and the mover has a plurality of annular magnetic pole portions having magnetic pole faces opposed to the permanent magnet array with a predetermined gap, and a yoke for magnetically connecting the plurality of annular magnetic pole portions, An armature unit having a core unit in which magnetic pole portions are arranged at intervals in the axial direction and a plurality of exciting windings that excite a plurality of annular magnetic pole portions is provided. The plurality of annular magnetic pole portions include a pair of end annular magnetic pole portions located at both ends in the axial direction and one or more intermediate annular magnetic pole portions located between the pair of end annular magnetic pole portions. One or more intermediate annular magnetic pole portions excluding the whole of the plurality of annular magnetic pole portions or the pair of end annular magnetic pole portions located at both ends in the axial direction are attached to the annular magnetic pole portion body and the magnetic pole portion body. And a magnetic pole face structure. The dimension of the magnetic pole surface constituting body in the axial direction is larger than the dimension of the magnetic pole part body in the axial direction. The magnetic pole part body is formed with a plurality of attached parts to which the magnetic pole surface structure is attached at intervals in the circumferential direction of the magnetic pole part body, and the magnetic pole surface structure has a plurality of attachment parts attached to the plurality of attached parts. Is formed. When the magnetic pole surface constituting body is fitted to the magnetic pole part main body, the plurality of attached parts and the plurality of attachment parts are respectively fitted.

このように、複数の被取付部と複数の取付部をリング形状の磁極部本体の周方向に間隔をあけて形成すると、複数の被取付部と複数の取付部との嵌合により、磁極面構成体が磁極部本体に対して周方向に動くのを防ぐことができる。 As described above, when the plurality of attachment portions and the plurality of attachment portions are formed at intervals in the circumferential direction of the ring-shaped magnetic pole portion main body, the magnetic pole surface is formed by fitting the plurality of attachment portions and the plurality of attachment portions. The structure can be prevented from moving in the circumferential direction with respect to the magnetic pole part body.

磁極面構成体は、帯状磁性板の長手方向の両端部が対向し且つ両端部間に分離部を有するリング形状に、帯状磁性板が曲げ加工して構成することができる。磁極面構成体は、分離部を構成する両端部間の間隔を狭くするまたは広げる方向の力を利用して、磁極部本体に嵌合する。このようにすれば、リング形状の磁極面構成体を簡単に形成できる。 The magnetic pole surface structure can be formed by bending the belt-shaped magnetic plate into a ring shape in which both ends in the longitudinal direction of the belt-shaped magnetic plate are opposed to each other and a separation portion is provided between both ends. The magnetic pole surface constituting body is fitted to the magnetic pole part main body by using a force in a direction of narrowing or widening the distance between both end parts constituting the separating part. In this way, a ring-shaped magnetic pole surface structure can be easily formed.

中間環状磁極部の磁極面構成体は、磁極部本体よりも軸線方向両側に突出する部分を有するように構成し、一対の端部環状磁極部の磁極面構成体は、隣接する中間環状磁極部に向かって磁極部本体よりも軸線方向に突出する部分を有するように構成すればよい。 The magnetic pole surface constituting body of the intermediate annular magnetic pole portion is configured to have portions protruding on both sides in the axial direction from the magnetic pole portion main body, and the magnetic pole face constituting body of the pair of end annular magnetic pole portions is adjacent to the intermediate annular magnetic pole portion. What is necessary is just to comprise so that it may have a part which protrudes in an axial direction rather than a magnetic pole part main body.

被取付部及び取付部の一方は突部から構成し、被取付部及び取付部の他方は突部が嵌合される孔部から構成することができる。このようにすれば、被取付部及び取付部を簡単に形成することができる。 One of the attached portion and the attaching portion may be constituted by a protruding portion, and the other of the attached portion and the attaching portion may be constituted by a hole portion into which the protruding portion is fitted. If it does in this way, a to-be-attached part and an attaching part can be formed easily.

電機子ユニットと永久磁石列ユニットとは同心的に配置し且つ電機子ユニットを永久磁石列ユニットの外側に配置することができる。この場合、磁極部本体の永久磁石列ユニットと対向する内周側端部に磁極面構成体を取り付け、磁極面構成体は、分離部を構成する両端部間の間隔を拡げる方向の力を利用して磁極部本体に嵌合する。このようにすれば、磁極面構成体は、分離部を構成する両端部間の間隔を拡げる方向の力を利用して、磁極部本体に強固に嵌合できる。 The armature unit and the permanent magnet row unit can be arranged concentrically and the armature unit can be arranged outside the permanent magnet row unit. In this case, the magnetic pole surface structure is attached to the inner peripheral side end of the magnetic pole section body facing the permanent magnet array unit, and the magnetic pole surface structure uses a force in a direction that widens the distance between both ends of the separation section. Then, it is fitted to the magnetic pole part body. In this way, the magnetic pole surface constituting body can be firmly fitted to the magnetic pole part main body by using a force in a direction in which the distance between both end parts constituting the separating part is increased.

電機子ユニットと永久磁石列ユニットとは同心的に配置し且つ電機子ユニットを永久磁石列ユニットの内側に配置することができる。この場合、磁極部本体の永久磁石列ユニットと対向する外周側端部に磁極面構成体を取り付け、磁極面構成体は、分離部を構成する両端部間の間隔を狭める方向の力を利用して磁極部本体に嵌合する。このようにすれば、磁極面構成体は、分離部を構成する両端部間の間隔を狭める方向の力を利用して、磁極部本体に強固に嵌合できる。 The armature unit and the permanent magnet row unit can be arranged concentrically, and the armature unit can be placed inside the permanent magnet row unit. In this case, the magnetic pole surface structure is attached to the outer peripheral side end of the magnetic pole section body that faces the permanent magnet array unit, and the magnetic pole surface structure uses a force in a direction that narrows the interval between both ends of the separation section. Fit to the magnetic pole body. In this way, the magnetic pole surface constituting body can be firmly fitted to the magnetic pole part main body by using the force in the direction of narrowing the distance between the both end parts constituting the separating part.

本発明のリニア同期モータの一実施の形態の正面図である。なお、直動軸の軸線を中心に９０°の角度範囲で一部を破断した状態で示している。It is a front view of one embodiment of a linear synchronous motor of the present invention. In addition, it has shown in the state fractured | ruptured in the angle range of 90 degrees centering on the axis line of a linear motion axis | shaft. 図１に示すリニア同期モータの左側面図である。It is a left view of the linear synchronous motor shown in FIG. 図１に示すリニア同期モータの右側面図である。It is a right view of the linear synchronous motor shown in FIG. （Ａ）〜（Ｃ）は、図１に示すリニア同期モータに用いるボビンの平面図、正面図及び右側面図である。(A)-(C) are the top view, front view, and right view of a bobbin used for the linear synchronous motor shown in FIG. 図１の部分拡大図である。It is the elements on larger scale of FIG. （Ａ）は、図１に示すリニア同期モータに用いる中間環状磁極部の平面図であり、（Ｂ）は、図６（Ａ）のＢ−Ｂ線断面図である。(A) is a top view of the intermediate | middle annular magnetic pole part used for the linear synchronous motor shown in FIG. 1, (B) is the BB sectional drawing of FIG. 6 (A). （Ａ）は、図１に示すリニア同期モータに用いる中間環状磁極部の磁極部本体の平面図であり、（Ｂ）は、図７（Ａ）のＢ−Ｂ線断面図である。(A) is a top view of the magnetic pole part main body of the intermediate | middle annular magnetic pole part used for the linear synchronous motor shown in FIG. 1, (B) is the BB sectional drawing of FIG. 7 (A). （Ａ）及び（Ｂ）は、図１に示すリニア同期モータに用いる中間環状磁極部の磁極面構成体の平面図及び右側面図である。(A) And (B) is the top view and right view of a magnetic pole surface structure of an intermediate | middle annular magnetic pole part used for the linear synchronous motor shown in FIG. 図８に示す磁極面構成体を形成するための帯状磁性板の平面図である。It is a top view of the strip | belt-shaped magnetic board for forming the magnetic pole surface structure shown in FIG. （Ａ）は、本発明の他の実施の形態のリニア同期モータに用いる中間環状磁極部の磁極部本体の平面図であり、（Ｂ）は、図１０（Ａ）のＢ−Ｂ線断面図である。(A) is a top view of the magnetic pole part main body of the intermediate | middle annular magnetic pole part used for the linear synchronous motor of other embodiment of this invention, (B) is the BB sectional drawing of FIG. 10 (A). It is. （Ａ）及び（Ｂ）は、本発明の他の実施の形態のリニア同期モータに用いる中間環状磁極部の磁極面構成体の平面図及び右側面図である。(A) And (B) is the top view and right view of a magnetic pole surface structure of an intermediate | middle annular magnetic pole part used for the linear synchronous motor of other embodiment of this invention. 本発明のさらに他の実施の形態のリニア同期モータの半部の断面図である。It is sectional drawing of the half part of the linear synchronous motor of other embodiment of this invention. （Ａ）は、図１２に示すリニア同期モータに用いる直動軸の断面図であり、（Ｂ）は、図１３（Ａ）のＢ−Ｂ線断面図である。(A) is sectional drawing of the linear motion shaft used for the linear synchronous motor shown in FIG. 12, (B) is BB sectional drawing of FIG. 13 (A).

以下、本発明の実施の形態の一例を詳細に説明する。図１〜図３は、本発明のリニア同期モータの一実施の形態の正面図、左側面図及び右側面図である。なお、図１は、直動軸１３の軸線を中心に９０°の角度範囲で一部を破断した状態で示している。図１に示すように、本例のリニア同期モータは、可動子１と固定子３とを有している。可動子１は、永久磁石列ユニット５と、一対のガイド軸７と、第１及び第２の連結部材９Ａ，９Ｂと、被検出用永久磁石１１とを有している。永久磁石列ユニット５は、永久磁石支持体を構成する直動軸１３と永久磁石列１５とを有している。直動軸１３は、導磁性材料からなり細長い円筒形を有しており、軸線方向に往復移動する。永久磁石列１５は、直動軸１３の外周に嵌合されて直動軸１３の軸線方向に並ぶ８個の円環状の永久磁石１７により構成されている。８個の永久磁石１７は、直動軸１３の径方向の外面にＮ極が現れるように着磁された４個の円環状の永久磁石１７と、Ｓ極が現れるよう着磁された４個の円環状の永久磁石１７とを含んでいる。そして８個の永久磁石１７は、Ｎ極とＳ極とが軸線方向に交互に並ぶように配置されている。本例では、１つの永久磁石１７は、円弧状の６個の永久磁石片が直動軸１３の周方向に並ぶように配置されて構成されている。なお、永久磁石は、本例のように直動軸１３の外周に直接的に取り付けてもよいし、間接的に取り付けてもよい。例えば、直動軸１３の外周に磁石取付部を固定し、該磁石取付部に永久磁石列（複数の永久磁石）を固定することもできる。 Hereinafter, an example of an embodiment of the present invention will be described in detail. 1 to 3 are a front view, a left side view, and a right side view of an embodiment of a linear synchronous motor of the present invention. FIG. 1 shows a state in which a part thereof is broken in an angle range of 90 ° with the axis of the linear motion shaft 13 as the center. As shown in FIG. 1, the linear synchronous motor of this example includes a mover 1 and a stator 3. The mover 1 includes a permanent magnet array unit 5, a pair of guide shafts 7, first and second connecting members 9 A and 9 B, and a detected permanent magnet 11. The permanent magnet array unit 5 includes a linear motion shaft 13 and a permanent magnet array 15 that constitute a permanent magnet support. The linear motion shaft 13 is made of a magnetic conductive material and has an elongated cylindrical shape, and reciprocates in the axial direction. The permanent magnet row 15 is configured by eight annular permanent magnets 17 that are fitted to the outer periphery of the linear motion shaft 13 and are arranged in the axial direction of the linear motion shaft 13. The eight permanent magnets 17 include four annular permanent magnets 17 that are magnetized so that the N pole appears on the outer surface in the radial direction of the linear motion shaft 13, and four magnets that are magnetized so that the S pole appears. And an annular permanent magnet 17. The eight permanent magnets 17 are arranged so that N poles and S poles are alternately arranged in the axial direction. In this example, one permanent magnet 17 is configured such that six arc-shaped permanent magnet pieces are arranged in the circumferential direction of the linear motion shaft 13. The permanent magnet may be directly attached to the outer periphery of the linear motion shaft 13 as in this example, or may be attached indirectly. For example, a magnet attachment portion can be fixed to the outer periphery of the linear motion shaft 13 and a permanent magnet row (a plurality of permanent magnets) can be fixed to the magnet attachment portion.

一対のガイド軸７は、ステンレスからなり細長い円柱形を有している。一対のガイド軸７は、直動軸１３と平行に延びるように配置され、第１及び第２の連結部材９Ａ，９Ｂを介して直動軸１３に連結されている。一対のガイド軸７は、固定子３の一対の磁性筒体３９内に配置されたリニア軸受４２によってスライド可能にそれぞれ支持されている。この支持構造により、可動子１の直動軸１３は、固定子３の中心に位置決めされる。 The pair of guide shafts 7 are made of stainless steel and have an elongated cylindrical shape. The pair of guide shafts 7 are disposed so as to extend in parallel with the linear motion shaft 13 and are connected to the linear motion shaft 13 via the first and second connection members 9A and 9B. The pair of guide shafts 7 are slidably supported by linear bearings 42 disposed in the pair of magnetic cylinders 39 of the stator 3. With this support structure, the linear motion shaft 13 of the mover 1 is positioned at the center of the stator 3.

第１及び第２の連結部材９Ａ，９Ｂは、いずれもアルミニウムからなり、細長い板形状を有している。図２に示すように、第１の連結部材９Ａの中央には、４本の螺子１９により直動軸１３の一方の端部が連結されており、第１の連結部材９Ａの両端部には、螺子２１により一対のガイド軸７のそれぞれの一方の端部が連結されている。また、図３に示すように、第２の連結部材９Ｂの中央には、４本の螺子１９′により直動軸１３の他方の端部が連結されており、第２の連結部材９Ｂの両端部には、螺子２１′により一対のガイド軸７のそれぞれの他方の端部が連結されている。 The first and second connecting members 9A and 9B are both made of aluminum and have an elongated plate shape. As shown in FIG. 2, one end of the linear movement shaft 13 is connected to the center of the first connecting member 9A by four screws 19, and both ends of the first connecting member 9A are connected to both ends. The screw 21 connects one end of each of the pair of guide shafts 7. As shown in FIG. 3, the other end of the linear movement shaft 13 is connected to the center of the second connecting member 9B by four screws 19 ', and both ends of the second connecting member 9B are connected. The other end of each of the pair of guide shafts 7 is connected to the portion by a screw 21 '.

図１に示すように、固定子３は、電機子ユニット２３を備えている。電機子ユニット２３は、６個の励磁巻線２５Ａ〜２５Ｆとコアユニット２７とを有している。６個の励磁巻線２５Ａ〜２５Ｆは、巻線導体が環状に巻かれて形成され、直動軸１３の軸線方向に間隔をあけて配置され且つ直動軸１３の周囲を囲むように配置されている。６個の励磁巻線２５Ａ〜２５Ｆには、電気角で１２０°ずつ位相がずれた３相の励磁電流（Ｕ，Ｖ，Ｗ）が流れている。具体的には、６個の励磁巻線２５Ａ〜２５Ｆには、Ｕ相，−Ｕ相，−Ｖ相，Ｖ相，Ｗ相，−Ｗ相の励磁電流がそれぞれ流れている。励磁巻線２５Ａ〜２５Ｆは、図４（Ａ）〜（Ｃ）に示すボビン２９にそれぞれ収納されている。ボビン２９は、励磁巻線２５Ａ〜２５Ｆと後述する環状磁極部（３３，３５，３７）とを絶縁する絶縁合成樹脂材料により形成されている。ボビン２９は、中央部に直動軸１３が貫通する筒部２９ａと、筒部２９ａの両端に一体に設けられて直動軸１３の軸線方向と直交する方向に延びる一対の鍔部２９ｂとを有している。一対の鍔部２９ｂの一方の鍔部には、励磁巻線（２５Ａ〜２５Ｆ）の巻始めの引き出し線をボビン２９の鍔部２９ｂの径方向外側に引き出すように径方向に延びる溝部２９ｃが形成されている。そして、一方の鍔部２９ｂには、溝部２９ｃが内部に形成され且つ他方の鍔部２９ｂから離れる方向に膨出する膨出部２９ｄが一体に形成されている。膨出部２９ｄ内には、溝部２９ｃから引き出された巻き始めの引き出し線が収納されている。励磁巻線２５Ａ〜２５Ｆを内部に収納したボビン２９は、後述する５個の中間環状磁極部３７が治具や一対の磁性筒体３９等により位置決め固定された後に、隣り合う２つの環状磁極部（３３，３５，３７）間に挿入できる形状及び寸法を有している。 As shown in FIG. 1, the stator 3 includes an armature unit 23. The armature unit 23 has six exciting windings 25 A to 25 F and a core unit 27. The six exciting windings 25 A to 25 F are formed by winding a winding conductor in an annular shape, arranged at intervals in the axial direction of the linear motion shaft 13, and disposed so as to surround the periphery of the linear motion shaft 13. ing. Three excitation currents (U, V, W) that are out of phase by 120 ° in electrical angle flow through the six excitation windings 25A to 25F. Specifically, excitation currents of U phase, -U phase, -V phase, V phase, W phase, and -W phase flow through the six excitation windings 25A to 25F, respectively. Excitation windings 25A-25F are housed in bobbins 29 shown in FIGS. 4 (A)-(C), respectively. The bobbin 29 is formed of an insulating synthetic resin material that insulates the excitation windings 25A to 25F from annular magnetic pole portions (33, 35, 37) described later. The bobbin 29 includes a cylindrical portion 29a through which the linear motion shaft 13 penetrates in a central portion, and a pair of flange portions 29b that are integrally provided at both ends of the cylindrical portion 29a and extend in a direction orthogonal to the axial direction of the linear motion shaft 13. Have. A groove portion 29c extending in the radial direction is formed in one of the pair of flange portions 29b so as to pull out the lead wire at the beginning of the excitation winding (25A to 25F) to the radially outer side of the flange portion 29b of the bobbin 29. Has been. The one flange 29b is integrally formed with a bulging portion 29d having a groove 29c formed therein and bulging in a direction away from the other flange 29b. In the bulging portion 29d, a winding start lead wire pulled out from the groove portion 29c is accommodated. The bobbin 29 in which the excitation windings 25A to 25F are housed has two annular magnetic pole portions adjacent to each other after five intermediate annular magnetic pole portions 37, which will be described later, are positioned and fixed by a jig, a pair of magnetic cylinders 39, and the like. It has a shape and size that can be inserted between (33, 35, 37).

図１に戻って説明すると、コアユニット２７は、エンドブラケット３１と、一対の端部環状磁極部３３及び３５と、５個の中間環状磁極部３７と、一対の磁性筒体３９と、一対の磁性板４１とを有している。エンドブラケット３１は、非磁性のアルミニウム板材等に切削加工が施されて形成されている。エンドブラケット３１の中央部には、直動軸１３が貫通する貫通孔３１ａが形成されている。また、エンドブラケット３１の両端部には、一対のガイド軸７のそれぞれが貫通する貫通孔３１ｂが形成されている。 Returning to FIG. 1, the core unit 27 includes an end bracket 31, a pair of end annular magnetic pole portions 33 and 35, five intermediate annular magnetic pole portions 37, a pair of magnetic cylinders 39, and a pair of And a magnetic plate 41. The end bracket 31 is formed by cutting a nonmagnetic aluminum plate or the like. A through hole 31 a through which the linear motion shaft 13 passes is formed at the center of the end bracket 31. Further, at both ends of the end bracket 31, a through hole 31b through which each of the pair of guide shafts 7 passes is formed.

一対の端部環状磁極部３３及び３５の一方の端部環状磁極部３３は、環状の磁極部本体４５と、該磁極部本体４５に嵌合される磁極面構成部４７とを有している。磁極部本体４５は、図１の上下方向の端部に一対の被連結部分５１を有しており（図１において、下方の被連結部分５１は、周壁部４３に覆われている）、所定の厚みの磁性鋼材に切削加工が施されて形成されている。磁極部本体４５の中央には、直動軸１３が貫通する貫通孔４５ａが形成されている。一対の被連結部分５１の中央には、一対の磁性筒体３９のそれぞれが貫通する貫通孔５１ａが形成されている。また、磁極部本体４５の図１の紙面と直交する方向の両側には、一対の磁性板４１がそれぞれ当接している。さらに、図５（図１の部分拡大図）に示すように、磁極部本体４５の隣接する中間環状磁極部３７が位置する側の端部には、貫通孔４５ａ内に突出する環状の凸部４５ｂが形成されている。 One end annular magnetic pole part 33 of the pair of end annular magnetic pole parts 33 and 35 has an annular magnetic pole part main body 45 and a magnetic pole surface constituting part 47 fitted to the magnetic pole part main body 45. . The magnetic pole part main body 45 has a pair of connected parts 51 at the end in the vertical direction in FIG. 1 (in FIG. 1, the lower connected part 51 is covered by the peripheral wall part 43), and is predetermined. It is formed by cutting a magnetic steel material having a thickness of. A through hole 45 a through which the linear motion shaft 13 passes is formed in the center of the magnetic pole part main body 45. A through hole 51 a through which each of the pair of magnetic cylinders 39 penetrates is formed in the center of the pair of connected portions 51. Further, a pair of magnetic plates 41 are in contact with both sides of the magnetic pole part main body 45 in the direction orthogonal to the paper surface of FIG. Furthermore, as shown in FIG. 5 (partially enlarged view of FIG. 1), an annular convex portion protruding into the through hole 45a is formed at the end of the magnetic pole portion main body 45 on the side where the adjacent intermediate annular magnetic pole portion 37 is located. 45b is formed.

端部環状磁極部３３の磁極面構成部４７は、円環状を有しており、内周に永久磁石列１５と所定の間隙を介して対向する磁極面４７ａを備えている。磁極面４７ａは、隣接する中間環状磁極部３７から直動軸１３の軸線方向に離れるに従って、永久磁石列１５との間の間隙寸法が大きくなるように傾斜している。環状の磁極面構成部４７の外周には、磁極部本体４５側と隣接する中間環状磁極部３７側とに開口する凹部４７ｂが形成されている。磁極面構成部４７は、磁極部本体４５の凸部４５ｂと磁極面構成部４７の凹部４７ｂとが嵌合された状態で、貫通孔４５ａ内に配置される。また、磁極面構成部４７の直動軸１３に対向する端部には、軸線方向に延びる環状の顎部４７ｃが一体に形成されている。 The magnetic pole surface constituting portion 47 of the end annular magnetic pole portion 33 has an annular shape, and includes a magnetic pole surface 47a facing the permanent magnet row 15 with a predetermined gap on the inner periphery. The magnetic pole surface 47a is inclined so that the gap between the magnetic pole surface 47a and the permanent magnet row 15 increases as the distance from the adjacent intermediate annular magnetic pole portion 37 in the axial direction of the linear motion shaft 13 increases. On the outer periphery of the annular magnetic pole surface constituting portion 47, a concave portion 47b is formed that opens to the magnetic pole portion main body 45 side and the adjacent intermediate annular magnetic pole portion 37 side. The magnetic pole surface constituting portion 47 is disposed in the through hole 45a in a state where the convex portion 45b of the magnetic pole portion main body 45 and the concave portion 47b of the magnetic pole surface constituting portion 47 are fitted. Further, an annular jaw portion 47c extending in the axial direction is integrally formed at an end portion of the magnetic pole surface constituting portion 47 facing the linear motion shaft 13.

図１に示すように、一対の端部環状磁極部３３及び３５の他方の端部環状磁極部３５も、環状の磁極部本体５３と、該磁極部本体５３に嵌合される磁極面構成部５５とを有している。磁極部本体５３は、図１の上下方向の端部に一対の被連結部分５９を有しており（図１において、下方の被連結部分５９は、周壁部４３に覆われている）、所定の厚みの磁性鋼材に切削加工が施されて形成されている。磁極部本体５３の中央には、直動軸１３が貫通する貫通孔５３ａが形成されている。一対の被連結部分５９の中央には、一対のガイド軸７のそれぞれが貫通する貫通孔５９ａが形成されている。また、磁極部本体５３の図１の紙面と直交する方向の両側には、一対の磁性板４１がそれぞれ当接している。さらに、図５（図１の部分拡大図）に示すように、磁極部本体５３の隣接する中間環状磁極部３７が位置する側の端部には、貫通孔５３ａ内に突出する環状の凸部５３ｂが形成されている。 As shown in FIG. 1, the other end annular magnetic pole portion 35 of the pair of end annular magnetic pole portions 33 and 35 is also an annular magnetic pole portion main body 53 and a magnetic pole surface constituting portion fitted to the magnetic pole portion main body 53. 55. The magnetic pole part main body 53 has a pair of connected portions 59 at the end portions in the vertical direction in FIG. 1 (in FIG. 1, the lower connected portions 59 are covered by the peripheral wall portion 43). It is formed by cutting a magnetic steel material having a thickness of. A through hole 53 a through which the linear motion shaft 13 passes is formed in the center of the magnetic pole part body 53. A through hole 59 a through which each of the pair of guide shafts 7 penetrates is formed at the center of the pair of connected portions 59. Further, a pair of magnetic plates 41 are in contact with both sides of the magnetic pole part body 53 in the direction orthogonal to the plane of FIG. Further, as shown in FIG. 5 (partially enlarged view of FIG. 1), an annular convex portion protruding into the through hole 53a is formed at the end of the magnetic pole portion main body 53 on the side where the adjacent intermediate annular magnetic pole portion 37 is located. 53b is formed.

端部環状磁極部３５の磁極面構成部５５は、円環状を有しており、内周に永久磁石列１５と所定の間隙を介して対向する磁極面５５ａを備えている。磁極面５５ａは、隣接する中間環状磁極部３７から直動軸１３の軸線方向に離れるに従って、永久磁石列１５との間の間隙寸法が大きくなるように傾斜している。環状の磁極面構成部５５の外周には、磁極部本体５３側と隣接する中間環状磁極部３７側とに開口する凹部５５ｂが形成されている。磁極面構成部５５は、磁極部本体５３の凸部５３ｂと磁極面構成部５５の凹部５５ｂとが嵌合された状態で、貫通孔５３ａ内に配置される。磁極面構成部５５の直動軸１３に対向する端部には、軸線方向に延びる環状の顎部５５ｃが一体に形成されている。本例では、上述の顎部４７ｃにより、端部環状磁極部３３の磁極面を大きくすることができ、顎部５５ｃにより、端部環状磁極部３５の磁極面を大きくすることができる。そのため、電機子ユニット２３の大きさを小さくして、トルクを高めることができる。また、顎部４７ｃ，５５ｃの大きさを調整することにより、コギングトルクを減少させることもできる。 The magnetic pole surface constituting portion 55 of the end annular magnetic pole portion 35 has an annular shape, and includes a magnetic pole surface 55a facing the permanent magnet row 15 with a predetermined gap on the inner periphery. The magnetic pole surface 55a is inclined so that the gap between the magnetic pole surface 55a and the permanent magnet row 15 increases as the distance from the adjacent intermediate annular magnetic pole portion 37 in the axial direction of the linear motion shaft 13 increases. On the outer periphery of the annular magnetic pole surface constituting portion 55, a concave portion 55b is formed that opens to the magnetic pole portion main body 53 side and the adjacent intermediate annular magnetic pole portion 37 side. The magnetic pole surface constituting portion 55 is disposed in the through hole 53a in a state where the convex portion 53b of the magnetic pole portion main body 53 and the concave portion 55b of the magnetic pole face constituting portion 55 are fitted. An annular jaw portion 55c extending in the axial direction is integrally formed at the end portion of the magnetic pole surface constituting portion 55 facing the linear motion shaft 13. In this example, the above-described jaw portion 47c can increase the magnetic pole surface of the end annular magnetic pole portion 33, and the jaw portion 55c can increase the magnetic pole surface of the end annular magnetic pole portion 35. Therefore, the size of the armature unit 23 can be reduced and the torque can be increased. Further, the cogging torque can be reduced by adjusting the sizes of the jaw portions 47c and 55c.

一方の端部環状磁極部３３と他方の端部環状磁極部３５との間に位置する５個の中間環状磁極部３７は、図６に示すように、環状の磁極部本体６１と、該磁極部本体６１に取り付けられる磁極面構成体６３とを有している。磁極部本体６１は、図７（Ａ）及び（Ｂ）に示すように、輪郭が矩形状の本体部６５と、図７の紙面において本体部６５の上下方向に位置する一対の被連結部分６７とを有している。図７（Ｂ）に示すように、磁極部本体６１は、複数枚の磁性鋼板が直動軸１３の軸線方向に積層されて構成されている。そして、図１に示すように、５個の中間環状磁極部３７は、一方の端部環状磁極部３３と他方の端部環状磁極部３５との間に軸線方向に並んで配置されている。図７に示すように、本体部６５の中央部には、直動軸１３が貫通する貫通孔６５ａが形成されている。本体部６５の貫通孔６５ａ側の内周面には、被取付部を構成する４つの突部６５ｂが周方向に間隔をあけて形成されている。また、図６の紙面において本体部６５の左右方向両側には、一対の磁性板４１（図１及び図３）がそれぞれ当接する。さらに本体部６５の縁部には、樹脂と共にリード線が貫通するリード線貫通孔６５ｃが形成されている。貫通孔６５ａとリード線貫通孔６５ｃとの間には膨出部嵌合溝６５ｄが形成されている。膨出部嵌合溝６５ｄは、リード線貫通孔６５ｃと連通している。膨出部嵌合溝６５ｄには、ボビン２９の膨出部２９ｄ（図４）が嵌合される。 As shown in FIG. 6, the five intermediate annular magnetic pole portions 37 positioned between the one end annular magnetic pole portion 33 and the other end annular magnetic pole portion 35 include an annular magnetic pole portion body 61 and the magnetic pole portion main body 61. And a magnetic pole surface structure 63 attached to the main body 61. As shown in FIGS. 7A and 7B, the magnetic pole part main body 61 has a rectangular main body part 65 and a pair of connected parts 67 positioned in the vertical direction of the main body part 65 on the paper surface of FIG. And have. As shown in FIG. 7B, the magnetic pole part body 61 is configured by laminating a plurality of magnetic steel plates in the axial direction of the linear motion shaft 13. As shown in FIG. 1, the five intermediate annular magnetic pole portions 37 are arranged side by side in the axial direction between one end annular magnetic pole portion 33 and the other end annular magnetic pole portion 35. As shown in FIG. 7, a through hole 65 a through which the linear motion shaft 13 passes is formed at the center of the main body 65. On the inner peripheral surface of the main body 65 on the side of the through hole 65a, four protrusions 65b constituting the attached portion are formed at intervals in the circumferential direction. In addition, a pair of magnetic plates 41 (FIGS. 1 and 3) abut on the left and right sides of the main body 65 on the paper surface of FIG. 6. Further, a lead wire through hole 65c through which the lead wire penetrates with the resin is formed at the edge of the main body portion 65. A bulging portion fitting groove 65d is formed between the through hole 65a and the lead wire through hole 65c. The bulging portion fitting groove 65d communicates with the lead wire through hole 65c. The bulging portion 29d (FIG. 4) of the bobbin 29 is fitted into the bulging portion fitting groove 65d.

一対の被連結部分６７には、軸線方向と直動軸１３から離れる方向とに向かって開口する嵌合用凹部６７ａが形成されている。嵌合用凹部６７ａの輪郭は半円形形状を有している。 The pair of connected portions 67 are formed with fitting recesses 67 a that open in the axial direction and in the direction away from the linear motion shaft 13. The outline of the fitting recess 67a has a semicircular shape.

本例では、図１に示すように、一方の端部環状磁極部３３と５個の中間環状磁極部３７と他方の端部環状磁極部３５とは、隣接する２つの環状磁極部（３３，３５，３７）の間に１つの励磁巻線（２５Ａ〜２５Ｆ）が配置されるスペースを形成するように軸線方向に間隔をあけて配置されている。 In this example, as shown in FIG. 1, one end annular magnetic pole part 33, five intermediate annular magnetic pole parts 37, and the other end annular magnetic pole part 35 have two adjacent annular magnetic pole parts (33, 35, 37) are arranged at intervals in the axial direction so as to form a space in which one excitation winding (25A to 25F) is arranged.

中間環状磁極部３７の磁極面構成体６３は、図８（Ａ）及び（Ｂ）に示すように、永久磁石列ユニット５の周囲を囲むように、リング形状を有しており、永久磁石列ユニット５に対向する内周に永久磁石列１５と所定の間隙を介して対向する磁極面６３ａを有している。このため、本例では、電機子ユニット２３と永久磁石列ユニット５とは同心的に配置され且つ電機子ユニット２３が永久磁石列ユニット５の外側に配置されることになる。そして、磁極面構成体６３は、中間環状磁極部３７の磁極部本体６１の永久磁石列ユニット５と対向する内周側端部に取り付けられることになる。磁極面構成体６３は、図９に示す帯状磁性板６４の長手方向の両端部が対向し且つ両端部間に分離部６３ｂを有するように、帯状磁性板６４が治具を用いて曲げ加工されて構成されている。磁極面構成体６３は、軸線方向に中央部６３ｃ[図８（Ｂ）の点線内側］と中央部６３ｃの両側に位置する一対の顎部６３ｄ［図８（Ｂ）の点線外側］とを有している。中央部６３ｃには、４つの取付部を構成する貫通孔６３ｅが磁極面構成体６３の周方向に間隔をあけて形成されている。磁極面構成体６３が磁極部本体６１に嵌合されるときに、中央部６３ｃと磁極部本体６１の内周面とが当接して、４つの貫通孔６３ｅと磁極部本体６１の４つの突部６５ｂ（図７）とがそれぞれ嵌合する。 As shown in FIGS. 8A and 8B, the magnetic pole surface structure 63 of the intermediate annular magnetic pole portion 37 has a ring shape so as to surround the permanent magnet array unit 5, and the permanent magnet array A magnetic pole surface 63a is provided on the inner periphery facing the unit 5 so as to face the permanent magnet array 15 with a predetermined gap. For this reason, in this example, the armature unit 23 and the permanent magnet row unit 5 are arranged concentrically, and the armature unit 23 is arranged outside the permanent magnet row unit 5. The magnetic pole surface constituting body 63 is attached to the inner circumferential end of the intermediate annular magnetic pole portion 37 facing the permanent magnet array unit 5 of the magnetic pole portion main body 61. In the magnetic pole surface constituting body 63, the belt-like magnetic plate 64 is bent using a jig so that both ends in the longitudinal direction of the belt-like magnetic plate 64 shown in FIG. Configured. The magnetic pole surface constituting body 63 has a central portion 63c [inside of dotted line in FIG. 8B] in the axial direction and a pair of jaw portions 63d [outside of dotted line in FIG. 8B] located on both sides of the central portion 63c. doing. In the central portion 63 c, through holes 63 e constituting four attachment portions are formed at intervals in the circumferential direction of the magnetic pole surface constituting body 63. When the magnetic pole surface constituting body 63 is fitted to the magnetic pole part main body 61, the central part 63c and the inner peripheral surface of the magnetic pole part main body 61 come into contact with each other, and the four protrusions of the four through holes 63e and the magnetic pole part main body 61 are brought into contact. The portions 65b (FIG. 7) are fitted to each other.

一対の顎部６３ｄは、磁極面構成体６３が磁極部本体６１に嵌合された状態で、磁極部本体６１よりも軸線方向両側に突出している。このため、磁極面構成体６３の軸線方向の寸法は、磁極部本体６１の軸線方向の寸法よりも大きくなる。本例では、顎部６３ｄによって、中間環状磁極部３７の磁極面を大きくすることができる。そのため、電機子ユニット２３の大きさを小さくして、トルクを高めることができる。また、顎部６３ｄの大きさを調整することにより、コギングトルクを減少させることもできる。磁極面構成体６３を磁極部本体６１に取り付けるには、磁極面構成体６３に外圧を加えて分離部６３ｂを構成する両端部間の間隔を狭めた状態で、磁極面構成体６３を磁極部本体６１の貫通孔６５ａ内に配置する。そして、外圧を解除して、磁極面構成体６３の４つの貫通孔６３ｅと磁極部本体６１の４つの突部６５ｂとをそれぞれ嵌合させる。磁極面構成体６３は、磁極部本体６１に取り付けられた状態で、分離部６３ｂを構成する両端部間の間隔を広げる方向の力を利用して、磁極部本体６１に嵌合される。 The pair of jaws 63 d protrudes on both sides in the axial direction from the magnetic pole part main body 61 in a state where the magnetic pole surface constituting body 63 is fitted to the magnetic pole part main body 61. For this reason, the dimension of the magnetic pole surface constituting body 63 in the axial direction is larger than the dimension of the magnetic pole part body 61 in the axial direction. In this example, the magnetic pole surface of the intermediate annular magnetic pole portion 37 can be enlarged by the jaw portion 63d. Therefore, the size of the armature unit 23 can be reduced and the torque can be increased. Further, the cogging torque can be reduced by adjusting the size of the jaw portion 63d. In order to attach the magnetic pole surface constituting body 63 to the magnetic pole part main body 61, the magnetic pole face constituting body 63 is attached to the magnetic pole part in a state in which an external pressure is applied to the magnetic pole surface constituting body 63 and the distance between both ends constituting the separating portion 63b is reduced. It arrange | positions in the through-hole 65a of the main body 61. FIG. Then, the external pressure is released, and the four through holes 63e of the magnetic pole surface constituting body 63 and the four protrusions 65b of the magnetic pole part main body 61 are fitted. The magnetic pole surface constituting body 63 is fitted to the magnetic pole part main body 61 by using a force in a direction to widen the distance between both end parts constituting the separating part 63b while being attached to the magnetic pole part main body 61.

図１に示すように、端部環状磁極部３３，３５と５個の中間環状磁極部３７と６個の励磁巻線２５Ａ〜２５Ｆとが組み合わされた状態で、一方の端部環状磁極部３３の一対の被連結部分５１と、他方の端部環状磁極部３５の一対の被連結部分５９と、５個の中間環状磁極部３７の一対の被連結部分６７（図６）とが直動軸１３に沿って並んで一対の被連結部分列６９が構成される。一対の被連結部分列６９をそれぞれ構成する一対の被連結部分（５１，５９，６７）は、一対の磁性筒体３９によってそれぞれ接続されている。また、端部環状磁極部３３，３５と５個の中間環状磁極部３７は、一対の磁性板４１によっても接続されている。 As shown in FIG. 1, one end annular magnetic pole portion 33 in a state where the end annular magnetic pole portions 33, 35, five intermediate annular magnetic pole portions 37, and six excitation windings 25 A to 25 F are combined. The pair of connected portions 51, the pair of connected portions 59 of the other end annular magnetic pole portion 35, and the pair of connected portions 67 (FIG. 6) of the five intermediate annular magnetic pole portions 37 are linearly driven. A pair of connected partial rows 69 are formed along the line 13. The pair of connected parts (51, 59, 67) that constitute the pair of connected part rows 69 are connected by a pair of magnetic cylinders 39, respectively. The end annular magnetic pole portions 33 and 35 and the five intermediate annular magnetic pole portions 37 are also connected by a pair of magnetic plates 41.

磁性筒体３９は、導磁性材料から一体に成形されており、円筒形を有している。そして、一対の磁性筒体３９のそれぞれの両端は、エンドブラケット３１と他方の端部環状磁極部３５とに当接している。また、一対の磁性筒体３９の一方の端部は、一方の端部環状磁極部３３の貫通孔５１ａを貫通している。磁性筒体３９の外周面は、中間環状磁極部３７の嵌合用凹部６７ａを囲む縁部分６７ｂ（図６）に当接している。そして、一対の磁性筒体３９のそれぞれの一方の端部とエンドブラケット３１とは図２に示す螺子７１により固定されている。また、一対の磁性筒体３９のそれぞれの他方の端部と他方の端部環状磁極部３５とは図３に示す螺子７３により固定されている。図１に示すように、一対の磁性筒体３９の内部には、一対のガイド軸７をそれぞれ支持する２つのリニア軸受４２が配置されている。 The magnetic cylinder 39 is integrally formed from a magnetic conductive material and has a cylindrical shape. Then, both ends of the pair of magnetic cylinders 39 are in contact with the end bracket 31 and the other end annular magnetic pole portion 35. One end of the pair of magnetic cylinders 39 penetrates the through hole 51 a of the one end annular magnetic pole portion 33. The outer peripheral surface of the magnetic cylinder 39 is in contact with an edge portion 67b (FIG. 6) surrounding the fitting recess 67a of the intermediate annular magnetic pole portion 37. Then, one end of each of the pair of magnetic cylinders 39 and the end bracket 31 are fixed by a screw 71 shown in FIG. The other end of each of the pair of magnetic cylinders 39 and the other end annular magnetic pole portion 35 are fixed by a screw 73 shown in FIG. As shown in FIG. 1, two linear bearings 42 that respectively support the pair of guide shafts 7 are disposed inside the pair of magnetic cylinders 39.

環状磁極部（３３，３５，３７）の図１の紙面と直交する方向の両側に当接する磁性板４１は、矩形状の磁性鋼板により形成されている。本例では、一対の磁性筒体３９により一対のヨーク構成体が構成され、一対の磁性板４１により一対の補助用ヨーク構成体が構成されている。この結果、一対の磁性筒体３９及び一対の磁性板４１により、環状磁極部（３３，３５，３７）を磁気的に連結するヨークが形成されている。 The magnetic plate 41 that contacts both sides of the annular magnetic pole portion (33, 35, 37) in the direction orthogonal to the paper surface of FIG. 1 is formed of a rectangular magnetic steel plate. In this example, a pair of yoke constituents is constituted by the pair of magnetic cylinders 39, and a pair of auxiliary yoke constituents is constituted by the pair of magnetic plates 41. As a result, the pair of magnetic cylinders 39 and the pair of magnetic plates 41 form a yoke that magnetically connects the annular magnetic pole portions (33, 35, 37).

コアユニット２７の外周には周壁部４３が配置されている。周壁部４３は、図１及び図３に示すように、第１の周壁部構成部材７５Ａと第２の周壁部構成部材７５Ｂとから構成されている。第１及び第２の周壁部構成部材７５Ａ，７５Ｂは、いずれも厚み寸法０．５ｍｍの導磁性材料により形成されている。第１の周壁部構成部材７５Ａは、上方に位置するコアユニット２７の一対の端部環状磁極部３３，３５の間の部分の大部分を覆っている。第２の周壁部構成部材７５Ｂは、下方に位置するコアユニット２７の一対の端部環状磁極部３３，３５の間の部分の大部分を覆っている。第１の周壁部構成部材７５Ａは、螺子７７を用いて、一対の磁性板（一対の補助用ヨーク構成体）４１と一緒にコアユニット２７の一対の端部環状磁極部３３，３５に連結されている。第２の周壁部構成部材７５Ｂは、螺子７８を用いて、一対の磁性板（一対の補助用ヨーク構成体）４１と一緒にコアユニット２７の一対の端部環状磁極部３３，３５に連結されている。 A peripheral wall portion 43 is disposed on the outer periphery of the core unit 27. As shown in FIGS. 1 and 3, the peripheral wall portion 43 includes a first peripheral wall portion constituting member 75A and a second peripheral wall portion constituting member 75B. The first and second peripheral wall constituting members 75A and 75B are both made of a magnetically conductive material having a thickness of 0.5 mm. 75 A of 1st surrounding wall part structural members have covered most of the part between a pair of edge part cyclic | annular magnetic pole parts 33 and 35 of the core unit 27 located upward. The second peripheral wall portion constituting member 75B covers most of the portion between the pair of end annular magnetic pole portions 33 and 35 of the core unit 27 located below. The first peripheral wall constituting member 75A is connected to the pair of end annular magnetic pole portions 33 and 35 of the core unit 27 together with the pair of magnetic plates (a pair of auxiliary yoke constituting bodies) 41 using screws 77. ing. The second peripheral wall portion constituting member 75B is coupled to the pair of end annular magnetic pole portions 33 and 35 of the core unit 27 together with the pair of magnetic plates (a pair of auxiliary yoke constituting bodies) 41 using screws 78. ing.

このような構成により、第１及び第２の周壁部構成部材７５Ａ，７５Ｂから構成される周壁部４３は、一対の端部環状磁極部３３，３５に跨って配置されて、５個の中間環状磁極部３７及び励磁巻線２５Ａ〜２５Ｆを囲むことになる。そして、６個の励磁巻線２５Ａ〜２５Ｆの径方向外側に位置する隣接する２つの環状磁極部（３３，３５，３７）の間の部分には合成樹脂からなるモールド層７９が形成されている。 With such a configuration, the peripheral wall portion 43 composed of the first and second peripheral wall portion constituting members 75A and 75B is disposed across the pair of end annular magnetic pole portions 33 and 35, and has five intermediate annular shapes. The magnetic pole portion 37 and the excitation windings 25A to 25F are surrounded. A mold layer 79 made of synthetic resin is formed in a portion between two adjacent annular magnetic pole portions (33, 35, 37) located on the radially outer side of the six excitation windings 25A to 25F. .

また、本例では、図１及び図３に示すように、コアユニット２７の他方の端部環状磁極部３５にホール素子８１が設けられており、直動軸１３には、ホール素子８１と対向するように、被検出用永久磁石１１が設けられている。そして、ホール素子８１と被検出用永久磁石１１とにより、磁極検出が行われる。 Further, in this example, as shown in FIGS. 1 and 3, the hall element 81 is provided in the other end annular magnetic pole portion 35 of the core unit 27, and the linear movement shaft 13 is opposed to the hall element 81. Thus, a permanent magnet 11 for detection is provided. Magnetic pole detection is performed by the Hall element 81 and the permanent magnet 11 to be detected.

本例のリニア同期モータによれば、中間環状磁極部３７の構成において、磁極面構成体６３の４つの被取付部（突部６５ｂ）と磁極部本体６１の４つの取付部（貫通孔６３ｅ）とを環状の磁極部本体６１の周方向に間隔をあけて形成するので、貫通孔６３ｅと突部６５ｂとの嵌合により、磁極面構成体６３が磁極部本体６１に対して周方向に動くのを防ぐことができる。また、帯状磁性板６４を曲げ加工してリング形状の磁極面構成体６３を形成するので、磁極面構成体６３を簡単に形成できる。 According to the linear synchronous motor of this example, in the configuration of the intermediate annular magnetic pole portion 37, the four attached portions (projecting portions 65b) of the magnetic pole surface constituting body 63 and the four attached portions (through holes 63e) of the magnetic pole portion main body 61. Are formed at intervals in the circumferential direction of the annular magnetic pole body 61, so that the magnetic pole surface constituting body 63 moves in the circumferential direction with respect to the magnetic pole body 61 by fitting the through hole 63e and the protrusion 65b. Can be prevented. Further, since the ring-shaped magnetic pole surface constituting body 63 is formed by bending the belt-like magnetic plate 64, the magnetic pole face constituting body 63 can be easily formed.

図１０（Ａ）及び（Ｂ）は、本発明の他の実施の形態のリニア同期モータに用いる中間環状磁極部の磁極部本体の平面図及び図１０（Ａ）のＢ−Ｂ線断面図であり、図１１（Ａ）及び（Ｂ）は、中間環状磁極部の磁極面構成体の平面図及び右側面図である。本例のリニア同期モータは、中間環状磁極部の磁極部本体における貫通孔側の内周面の構成及び磁極面構成体の構成以外は、図１〜図９に示す部材と同じ構成を有している。そのため、図１〜図９に示す部材と同じ部材には、図１〜図９に付した符号に１００を加えた符号を付して説明を省略する。図１０（Ａ）及び（Ｂ）に示すように、中間環状磁極部の環状の磁極部本体１６１の貫通孔１６５ａ側の内周面には、被取付部を構成する４つの突部１６５ｂが周方向に間隔をあけて形成されている。突部１６５ｂは、周方向の長さ寸法が図７に示す突部６５ｂより大きくなっている。図１１（Ｂ）に示すように、磁極面構成体１６３の中央部１６３ｃには、４つの取付部を構成する貫通孔１６３ｅが磁極部本体１６１の周方向に間隔をあけて形成されている。本例でも、磁極面構成体１６３が磁極部本体１６１に嵌合されるときに、中央部１６３ｃと磁極部本体１６１の内周面とが当接して、４つの貫通孔１６３ｅと磁極部本体１６１の４つの突部１６５ｂとがそれぞれ嵌合する。 10A and 10B are a plan view of a magnetic pole body of an intermediate annular magnetic pole portion used in a linear synchronous motor according to another embodiment of the present invention, and a cross-sectional view taken along line BB in FIG. 10A. FIGS. 11A and 11B are a plan view and a right side view of the magnetic pole surface structure of the intermediate annular magnetic pole portion. The linear synchronous motor of this example has the same configuration as the members shown in FIGS. 1 to 9 except for the configuration of the inner peripheral surface on the through hole side and the configuration of the magnetic pole surface structure in the magnetic pole body of the intermediate annular magnetic pole portion. ing. Therefore, the same members as those shown in FIGS. 1 to 9 are denoted by reference numerals obtained by adding 100 to the reference numerals attached to FIGS. As shown in FIGS. 10A and 10B, on the inner peripheral surface of the annular magnetic pole part main body 161 of the intermediate annular magnetic pole part on the side of the through hole 165a, there are four protrusions 165b constituting the attached part. It is formed at intervals in the direction. The protrusion 165b is larger in length in the circumferential direction than the protrusion 65b shown in FIG. As shown in FIG. 11B, through holes 163e constituting four attachment parts are formed in the central part 163c of the magnetic pole face constituting body 163 at intervals in the circumferential direction of the magnetic pole part body 161. Also in this example, when the magnetic pole surface constituting body 163 is fitted to the magnetic pole part main body 161, the central part 163c and the inner peripheral surface of the magnetic pole part main body 161 come into contact with each other, and the four through holes 163e and the magnetic pole part main body 161 are brought into contact. The four protrusions 165b are respectively fitted.

本例のリニア同期モータによれば、４つの突部１６５ｂの周方向の長さ寸法が大きくなるので、磁極面構成体１６３に磁束が流れやすくなり、磁気損失が比較的に小さく抑えられる。 According to the linear synchronous motor of this example, since the length in the circumferential direction of the four protrusions 165b is increased, the magnetic flux easily flows through the magnetic pole surface structure 163, and the magnetic loss is suppressed to be relatively small.

図１２は、本発明のさらに他の実施の形態のリニア同期モータの半部の断面図である。本例のリニア同期モータは、電機子ユニットが永久磁石列ユニットの内側に配置されている。本例のリニア同期モータは、可動子２０１と固定子２０３とを有している。可動子２０１は、永久磁石列ユニット２０５を備えている。永久磁石列ユニット２０５は、永久磁石支持体を構成する直動軸２１３と永久磁石列２１５とを有している。直動軸２１３は、円筒形を有しており、軸線方向に往復移動する。永久磁石列２１５は、直動軸２１３の内周に嵌合されて直動軸２１３の軸線方向に並ぶ円環状の複数の永久磁石２１７により構成されている。複数の永久磁石２１７は、Ｎ極とＳ極とが軸線方向に交互に並ぶように配置されている。永久磁石列ユニット２０５は、図示しない支持手段により、固定子２０３に対して可動に支持されている。 FIG. 12 is a sectional view of a half portion of a linear synchronous motor according to still another embodiment of the present invention. In the linear synchronous motor of this example, the armature unit is arranged inside the permanent magnet array unit. The linear synchronous motor of this example has a mover 201 and a stator 203. The mover 201 includes a permanent magnet array unit 205. The permanent magnet array unit 205 has a linear motion shaft 213 and a permanent magnet array 215 that constitute a permanent magnet support. The linear motion shaft 213 has a cylindrical shape and reciprocates in the axial direction. The permanent magnet row 215 includes a plurality of annular permanent magnets 217 that are fitted to the inner periphery of the linear motion shaft 213 and are arranged in the axial direction of the linear motion shaft 213. The plurality of permanent magnets 217 are arranged such that N poles and S poles are alternately arranged in the axial direction. The permanent magnet array unit 205 is movably supported with respect to the stator 203 by support means (not shown).

固定子２０３は、電機子ユニット２２３を備えている。電機子ユニット２２３は、複数の励磁巻線２２５とコアユニット２２７とを有している。各励磁巻線２２５は、ボビン２２９に収納されている。 The stator 203 includes an armature unit 223. The armature unit 223 has a plurality of excitation windings 225 and a core unit 227. Each excitation winding 225 is housed in a bobbin 229.

図１３（Ａ）及び図１３（Ｂ）に示すように、コアユニット２２７は、複数の中間環状磁極部２３７とヨーク２４１とを一体に有している。中間環状磁極部２３７は、磁極部本体２６１と、該磁極部本体２６１に嵌合される磁極面構成体２６３とを有している。磁極部本体２６１は、環状形状を有している。ヨーク２４１は、円筒形を有している。磁極部本体２６１の外周面には、被取付部を構成する４つの突部２６５ｂ［図１３（Ｂ）］が周方向に間隔をあけて形成されている。 As shown in FIGS. 13A and 13B, the core unit 227 has a plurality of intermediate annular magnetic pole portions 237 and a yoke 241 integrally. The intermediate annular magnetic pole portion 237 includes a magnetic pole portion main body 261 and a magnetic pole surface structure 263 fitted to the magnetic pole portion main body 261. The magnetic pole part main body 261 has an annular shape. The yoke 241 has a cylindrical shape. On the outer peripheral surface of the magnetic pole part main body 261, four protrusions 265b [FIG. 13B] constituting the attached part are formed at intervals in the circumferential direction.

中間環状磁極部２３７の磁極面構成体２６３は、永久磁石列ユニット２０５の内側に位置するように、リング形状を有しており、永久磁石列ユニット２０５に対向する外周に磁極面２６３ａを有している。このため、本例では、図１２に示すように、電機子ユニット２２３と永久磁石列ユニット２０５とは同心的に配置され且つ電機子ユニット２２３が永久磁石列ユニット２０５の内側に配置されることになる。そして、磁極面構成体２６３は、中間環状磁極部２３７の磁極部本体２６１における永久磁石列ユニット２０５と対向する外周側端部に取り付けられることになる。 The magnetic pole surface structure 263 of the intermediate annular magnetic pole portion 237 has a ring shape so as to be located inside the permanent magnet array unit 205, and has a magnetic pole surface 263 a on the outer periphery facing the permanent magnet array unit 205. ing. For this reason, in this example, as shown in FIG. 12, the armature unit 223 and the permanent magnet array unit 205 are arranged concentrically and the armature unit 223 is arranged inside the permanent magnet array unit 205. Become. The magnetic pole surface constituting body 263 is attached to the outer peripheral side end portion of the intermediate annular magnetic pole portion 237 facing the permanent magnet array unit 205 in the magnetic pole portion main body 261.

図１３（Ａ）に示すように、磁極面構成体２６３は、分離部２６３ｂを有している。また、図１２に示すように、磁極面構成体２６３は、軸線方向に中央部２６３ｃと中央部２６３ｃの両側に位置する一対の顎部２６３ｄとを有している。図１３（Ｂ）に示すように、中央部２６３ｃには、４つの取付部を構成する貫通孔２６３ｅが磁極面構成体２６３の周方向に間隔をあけて形成されている。磁極面構成体２６３が磁極部本体２６１に嵌合されるときに、中央部２６３ｃと磁極部本体２６１の内周面とが当接して、４つの貫通孔２６３ｅと磁極部本体２６１の４つの突部２６５ｂとがそれぞれ嵌合する。 As shown in FIG. 13A, the magnetic pole surface structure 263 has a separation portion 263b. As shown in FIG. 12, the magnetic pole surface structure 263 has a central portion 263c and a pair of jaw portions 263d located on both sides of the central portion 263c in the axial direction. As shown in FIG. 13B, through holes 263e constituting four attachment portions are formed in the central portion 263c at intervals in the circumferential direction of the magnetic pole face constituting body 263. When the magnetic pole surface constituting body 263 is fitted into the magnetic pole part body 261, the central part 263c and the inner peripheral surface of the magnetic pole part body 261 come into contact with each other, and the four protrusions of the four through holes 263e and the magnetic pole part body 261 are brought into contact. The parts 265b are respectively fitted.

一対の顎部２６３ｄは、磁極面構成体２６３が磁極部本体２６１に嵌合された状態で、磁極部本体２６１よりも軸線方向両側に突出している。このため、磁極面構成体２６３の軸線方向の寸法は、磁極部本体２６１の軸線方向の寸法よりも大きくなる。本例では、磁極面構成体２６３は、分離部２６３ｂを構成する両端部間の間隔を狭める方向の力を利用して、磁極部本体２６１に嵌合されている。 The pair of jaw portions 263d protrudes on both sides in the axial direction from the magnetic pole portion main body 261 in a state where the magnetic pole surface constituting body 263 is fitted to the magnetic pole portion main body 261. For this reason, the dimension of the magnetic pole surface constituting body 263 in the axial direction is larger than the dimension of the magnetic pole part body 261 in the axial direction. In this example, the magnetic pole surface constituting body 263 is fitted to the magnetic pole part main body 261 by using a force in a direction of narrowing the interval between both ends constituting the separating part 263b.

本例のリニア同期モータによれば、電機子ユニット２２３が永久磁石列ユニット２０５の内側に配置されるリニア同期モータにおいても、磁極面構成体２６３が磁極部本体２６１に対して周方向に動くのを防ぐことができる。 According to the linear synchronous motor of this example, even in the linear synchronous motor in which the armature unit 223 is disposed inside the permanent magnet array unit 205, the magnetic pole face constituting body 263 moves in the circumferential direction with respect to the magnetic pole part body 261. Can be prevented.

なお、上記の各例のリニア同期モータでは、可動子が永久磁石列ユニットを備え、固定子が電機子ユニットを備えた例を示したが、可動子が電機子ユニットを備え、固定子が永久磁石列ユニットを備えるリニア同期モータでも本発明が適用できるのは当然である。 In the linear synchronous motor of each example described above, an example is shown in which the mover includes a permanent magnet array unit and the stator includes an armature unit. However, the mover includes an armature unit and the stator is permanent. Of course, the present invention can also be applied to a linear synchronous motor including a magnet row unit.

また、上記の各例のリニア同期モータでは、被取付部を突部で形成し、取付部を孔部で形成したが、被取付部を孔部で形成し、取付部を突部で形成しても構わない。 In the linear synchronous motors of the above examples, the attached portion is formed by a protrusion and the attachment portion is formed by a hole. However, the attached portion is formed by a hole and the attachment portion is formed by a protrusion. It doesn't matter.

また、図１〜図９に示すリニア同期モータでは、中間環状磁極部のみにリング形状の磁極面構成体を備える例を示したが、一対の端部環状磁極部にも磁極面構成体を備えることができる。その場合、磁極面構成体は、隣接する中間環状磁極部に向かって磁極部本体よりも軸線方向に突出する部分（顎部）を有しているように構成すればよい。 Moreover, in the linear synchronous motor shown in FIGS. 1-9, although the example which equips only an intermediate | middle annular magnetic pole part with a ring-shaped magnetic pole surface structure was shown, a pair of end annular magnetic pole parts are also equipped with a magnetic pole surface structure. be able to. In this case, the magnetic pole surface structure may be configured to have a portion (jaw portion) that protrudes in the axial direction from the magnetic pole portion main body toward the adjacent intermediate annular magnetic pole portion.

本発明によれば、磁極部本体の複数の被取付部と磁極面構成体の複数の取付部を磁極部本体の周方向に間隔をあけて形成するので、複数の被取付部と複数の取付部との嵌合により、磁極面構成体が磁極部本体に対して周方向に動くのを防ぐことができる。また、帯状磁性板を曲げ加工してリング形状の磁極面構成体を形成するので、磁極面構成体を簡単に形成できる。 According to the present invention, the plurality of attached portions of the magnetic pole part main body and the plurality of attachment parts of the magnetic pole surface structure are formed at intervals in the circumferential direction of the magnetic pole part main body. By fitting with the part, it is possible to prevent the magnetic pole surface constituting body from moving in the circumferential direction with respect to the magnetic pole part body. Further, since the ring-shaped magnetic pole surface structure is formed by bending the belt-shaped magnetic plate, the magnetic pole surface structure can be easily formed.

１可動子
３固定子
５永久磁石列ユニット
７一対のガイド軸
９Ａ，９Ｂ第１及び第２の連結部材
１３直動軸
２３電機子ユニット
２７コアユニット
３１エンドブラケット
３３，３５一対の端部環状磁極部
３７中間環状磁極部
３９一対の磁性筒体
６１磁極部本体
６３磁極面構成体
６３ａ磁極面
６３ｂ分離部
６３ｅ貫通孔（取付部）
６４帯状磁性板
６５ｂ突部（被取付部）
６７一対の被連結部分
６７ａ嵌合用凹部
６７ｂ縁部分
６９一対の被連結部分列 DESCRIPTION OF SYMBOLS 1 Movable element 3 Stator 5 Permanent magnet row | line | column unit 7 A pair of guide shaft 9A, 9B 1st and 2nd connection member 13 Linear motion shaft 23 Armature unit 27 Core unit 31 End bracket 33, 35 A pair of end annular magnetic pole Part 37 intermediate annular magnetic pole part 39 pair of magnetic cylinders 61 magnetic pole part main body 63 magnetic pole surface structure 63a magnetic pole surface 63b separation part 63e through hole (attachment part)
64 Band-shaped magnetic plate 65b Projection (attached part)
67 A pair of connected portions 67a A recessed portion for fitting 67b An edge portion 69 A pair of connected portion rows

Claims

A mover comprising a linear motion shaft that reciprocally moves in an axial direction and one or more permanent magnet rows composed of a plurality of permanent magnets attached to the linear motion shaft;
A plurality of annular magnetic pole portions having a magnetic pole surface opposed to the permanent magnet row of the mover via a predetermined gap and arranged concentrically with the linear motion shaft so as to surround the linear motion shaft; A core unit having a yoke for magnetically connecting the plurality of annular magnetic pole portions, wherein the plurality of annular magnetic pole portions are arranged at intervals in the axial direction; and a plurality of exciting the plurality of annular magnetic pole portions And a stator having an excitation winding of
The plurality of annular magnetic pole portions of the core unit includes a pair of connected portions,
The plurality of annular magnetic pole portions are arranged such that the pair of coupled portions are arranged at a predetermined interval along the linear motion axis to form a pair of coupled portion rows,
The plurality of annular magnetic pole parts are composed of a pair of end annular magnetic pole parts located at both ends in the axial direction, and one or more intermediate annular magnetic pole parts located between the pair of end annular magnetic pole parts,
The yoke includes a pair of yoke structures that are formed of a magnetic conductive material and magnetically connect all of the plurality of connected parts that respectively constitute the pair of connected part rows.
The pair of yoke structures is constituted by a pair of magnetic cylinders that connect a plurality of the connected parts that respectively constitute the pair of connected part rows,
Linear bearings are respectively disposed inside the pair of magnetic cylinders,
A pair of guide shafts are slidably supported on the linear bearing,
One end of the linear motion shaft and one end of the pair of guide shafts are connected to a first connection member, and the other end of the linear motion shaft and the other end of the pair of guide shafts are second connection members. It is connected to,
Wherein one or more intermediate annular magnetic pole portion excluding the pair of end annular magnetic pole portions located at both ends of all or the axial direction of the previous SL plurality of annular magnetic pole portions includes an annular pole body, said pole body A magnetic pole surface structure that is attached and has the magnetic pole surface;
The dimension in the axial direction of the magnetic pole surface constituting body is larger than the dimension in the axial direction of the magnetic pole part body,
A plurality of attached portions to which the magnetic pole surface constituting body is attached are formed in the magnetic pole portion main body at intervals in the circumferential direction of the magnetic pole portion main body, and the magnetic pole surface constituting body is attached to the plurality of attached portions. A plurality of mounting portions are formed,
A linear synchronous motor in which the plurality of attached portions and the plurality of attachment portions are respectively fitted when the magnetic pole surface constituting body is fitted into the magnetic pole portion main body.

The magnetic pole surface structure is configured by bending the belt-shaped magnetic plate into a ring shape in which both end portions in the longitudinal direction of the belt-shaped magnetic plate are opposed to each other and a separation portion is provided between the both end portions,
2. The linear synchronization according to claim 1, wherein the magnetic pole surface constituting body is fitted to the magnetic pole part body by using a force in a direction of narrowing or widening a distance between the both end parts constituting the separating part. motor.

3. The linear synchronous motor according to claim 1, wherein the magnetic pole surface structure of the intermediate annular magnetic pole portion has portions that protrude to both sides in the axial direction from the magnetic pole portion main body.

3. The magnetic pole surface structure of the pair of end annular magnetic pole portions has a portion protruding in the axial direction from the magnetic pole portion main body toward the adjacent intermediate annular magnetic pole portion. The linear synchronous motor described.

2. The linear synchronous motor according to claim 1, wherein one of the attached portion and the attaching portion includes a protrusion, and the other of the attached portion and the attaching portion includes a hole portion into which the protrusion is fitted .

Before SL one or more intermediate annular magnetic pole portion includes a linear synchronous motor according to claim 1, wherein a plurality of magnetic steel plates of a predetermined shape is formed by laminating in the axial direction.