JP6347984B2 - Non-contact power transmission device - Google Patents

Non-contact power transmission device Download PDF

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JP6347984B2
JP6347984B2 JP2014099162A JP2014099162A JP6347984B2 JP 6347984 B2 JP6347984 B2 JP 6347984B2 JP 2014099162 A JP2014099162 A JP 2014099162A JP 2014099162 A JP2014099162 A JP 2014099162A JP 6347984 B2 JP6347984 B2 JP 6347984B2
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holder
coil
core
hole
plate portion
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JP2015216796A (en
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横沢　満雄
満雄 横沢
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Nidec Instruments Corp
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Nidec Sankyo Corp
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Description

本発明は、コイル間の磁気結合を利用して電力の伝送を行う非接触電力伝送装置に関するものである。   The present invention relates to a non-contact power transmission apparatus that transmits power using magnetic coupling between coils.

２つの部材間で電力の伝送を行う装置として、コイル間の磁気結合を利用して電力の伝送を行う非接触電力伝送装置が提案されており、かかる非接触電力伝送装置においては、第１コイルおよび第２コイルが各々、円環状の部材によって保持されている（特許文献１、２参照）。   As a device that transmits power between two members, a non-contact power transmission device that transmits power using magnetic coupling between coils has been proposed. In such a non-contact power transmission device, the first coil The second coil is held by an annular member (see Patent Documents 1 and 2).

特開２０００−９２７５２号公報JP 2000-92752 A 実開昭５７−９７９１９号公報Japanese Utility Model Publication No. 57-97919

しかしながら、第１コイルと第２コイルとの間で電力の伝送を行う場合、第１コイルと第２コイルとが適正な間隙を重なっていることが必要であるが、特許文献１、２に記載の構成では、コイル同士あるいはコイルを保持する部材同士の位置関係を直接、規定するものがない。このため、第１コイルと第２コイルとの間での電力の伝送効率が低いという問題点がある。   However, when power is transmitted between the first coil and the second coil, it is necessary that the first coil and the second coil overlap each other with an appropriate gap. In this configuration, there is nothing that directly defines the positional relationship between the coils or the members that hold the coils. For this reason, there exists a problem that the transmission efficiency of the electric power between a 1st coil and a 2nd coil is low.

以上の問題点に鑑みて、本発明の課題は、第１コイルと第２コイルとの間の電力の伝送効率を高めることのできる非接触電力伝送装置を提供することにある。   In view of the above problems, an object of the present invention is to provide a non-contact power transmission device capable of increasing the power transmission efficiency between the first coil and the second coil.

上記課題を解決するために、本発明に係る非接触電力伝送装置は、第１貫通穴が回転中心軸線上に形成された第１ホルダと、前記第１ホルダに保持され、前記第１貫通穴を中心に周回している第１コイルと、前記第１ホルダに対して前記回転中心軸線方向で対向し、第２貫通穴が前記回転中心軸線上に形成された第２ホルダと、前記第１コイルに対向するように前記第２ホルダに保持され、前記第２貫通穴を中心に周回している第２コイルと、前記第１貫通穴および前記第２貫通穴のうちの少なくとも一方で前記第１貫通穴および前記第２貫通穴に対して同心状に配置され、前記第１ホルダと前記第２ホルダとを相対回転可能に連結するボールベアリングからなる１つのラジアル軸受と、を有し、前記ラジアル軸受は、前記ラジアル軸受の内輪に前記回転中心軸線方向の前記第１ホルダが位置する側から被さった状態で前記第２ホルダに固定された第１カラー、および前記ラジアル軸受の外輪に前記回転中心軸線方向の前記第２ホルダが位置する側から被さった状態で前記第１ホルダに固定された第２カラーを介して前記第１ホルダと前記第２ホルダとを相対回転可能に連結し、前記第１ホルダには、前記外輪に前記回転中心軸線方向の前記第１ホルダが位置する側から当接して前記外輪が前記回転中心軸線方向の前記第１ホルダが位置する側に抜けることを防止する環状段部が設けられ、前記第２ホルダには、前記内輪に前記回転中心軸線方向の前記第２ホルダが位置する側から当接して前記内輪が前記回転中心軸線方向の前記第２ホルダが位置する側に抜けることを防止する環状段部が設けられていることを特徴とする。 In order to solve the above-described problem, a non-contact power transmission device according to the present invention includes a first holder having a first through hole formed on a rotation center axis , and the first through hole being held by the first holder. A first coil that circulates around the first center, a second holder that faces the first holder in the direction of the rotation center axis, and a second through hole is formed on the rotation center axis , and the first A second coil held by the second holder so as to face the coil and circling around the second through hole; and at least one of the first through hole and the second through hole; 1 are arranged concentrically with respect to the through hole and the second through-hole, it has a, and one radial bearing comprising a ball bearing that connects the first holder and the second holder relatively rotatably, said A radial bearing is an inner part of the radial bearing. A first collar fixed to the second holder in a state of covering the first holder in the rotation center axis direction from the side where the first holder is located, and the second holder in the rotation center axis direction on an outer ring of the radial bearing. The first holder and the second holder are connected so as to be relatively rotatable via a second collar fixed to the first holder in a state of covering from the side where the first holder is positioned, and the first holder is connected to the outer ring. An annular step portion is provided to prevent the outer ring from coming out to the side where the first holder in the rotation center axis direction is located by contacting from the side where the first holder in the rotation center axis direction is located, The two holders are in contact with the inner ring from the side where the second holder in the rotation center axis direction is located, and prevent the inner ring from coming out to the side where the second holder in the rotation center axis direction is located. Wherein the step portion is provided.

本発明では、第１ホルダの第１貫通穴、および第２ホルダの第２貫通穴のうちの少なくとも一方を利用して、第１ホルダと第２ホルダとを相対回転可能に連結するラジアル軸受が設けられている。このため、第１コイルと第２コイルの位置関係をラジアル軸受によって適正な状態とすることができるので、第１コイルと第２コイルとの間の電力の伝送効率を高めることができる。   In the present invention, a radial bearing that connects at least one of the first through hole of the first holder and the second through hole of the second holder so that the first holder and the second holder are relatively rotatable is provided. Is provided. For this reason, since the positional relationship between the first coil and the second coil can be brought into an appropriate state by the radial bearing, the power transmission efficiency between the first coil and the second coil can be increased.

本発明において、前記第１コイルに対して前記第２コイル側とは反対側で前記第１ホルダに保持された第１コアと、前記第２コイルに対して前記第１コイル側とは反対側で前記第２ホルダに保持された第２コアと、を有し、前記第１コアは、前記第１コイルに対して前記第２コイル側とは反対側で重なる底板部と、該底板部の内縁から突出して前記第１コイルの内周部分に径方向内側で重なる内板部と、前記底板部の外縁から突出して前記第１コイルの外周部分に径方向外側で重なる外板部と、を有し、前記第２コアは、前記第２コイルに対して前記第１コイル側とは反対側で重なる底板部と、該底板部の内縁から突出して前記第２コイルの内周部分に径方向内側で重なる内板部と、前記底板部の外縁から突出して前記第２コイルの外周部分に径方向外側で重なる外板部と、を有することが好ましい。かかる構成によれば、第１コイル側と第２コイル側との磁気的な結合を強くすることができる。   In this invention, the 1st core hold | maintained at the said 1st holder on the opposite side to the said 2nd coil side with respect to the said 1st coil, and the opposite side to the said 1st coil side with respect to the said 2nd coil And a second core held by the second holder, wherein the first core overlaps the first coil on a side opposite to the second coil side, and the bottom plate An inner plate that protrudes from the inner edge and overlaps the inner peripheral portion of the first coil on the radially inner side; and an outer plate portion that protrudes from the outer edge of the bottom plate and overlaps the outer peripheral portion of the first coil on the outer radial direction. The second core includes a bottom plate portion that overlaps the second coil on the side opposite to the first coil side, and protrudes from an inner edge of the bottom plate portion in a radial direction toward an inner peripheral portion of the second coil. An inner plate portion that overlaps inside, and an outer peripheral portion of the second coil that protrudes from the outer edge of the bottom plate portion Preferably has an outer plate portion that overlaps radially outward, the. According to such a configuration, the magnetic coupling between the first coil side and the second coil side can be strengthened.

本発明において、前記第１コアおよび前記第２コアでは、前記内板部の厚さが前記外板部の厚さより厚いことが好ましい。かかる構成によれば、周長が短い内板部で磁気飽和が発生することを抑制することができる。   In the present invention, in the first core and the second core, it is preferable that a thickness of the inner plate portion is larger than a thickness of the outer plate portion. According to such a configuration, it is possible to suppress the occurrence of magnetic saturation in the inner plate portion having a short circumference.

本発明において、前記第１コアおよび前記第２コアは、周方向に複数のコア片が配置された分割コアであり、前記第１コアを構成する前記コア片の間を通って前記第１コイルの端部が前記第１コアに対して前記第１コイルとは反対側に引き出されており、前記第２コアを構成する前記コア片の間を通って前記第２コイルの端部が前記第２コアに対して前記第２コイルとは反対側に引き出されていることが好ましい。かかる構成によれば、コイルの端部を引き回すための余計なスペースを削減することができる。   In the present invention, the first core and the second core are split cores in which a plurality of core pieces are arranged in a circumferential direction, and the first coil passes between the core pieces constituting the first core. The end of the second coil is drawn to the side opposite to the first coil with respect to the first core, and the end of the second coil passes between the core pieces constituting the second core. The two cores are preferably drawn to the opposite side of the second coil. According to this configuration, it is possible to reduce an extra space for routing the end of the coil.

本発明において、前記第１コアおよび前記第２コアは、熱硬化性樹脂によって磁性粉を固めてなることが好ましい。かかる構成によれば、比較的、簡素な設備でコアを製造することができる。   In the present invention, it is preferable that the first core and the second core are formed by solidifying magnetic powder with a thermosetting resin. According to this configuration, the core can be manufactured with relatively simple equipment.

本発明では、第１ホルダの第１貫通穴、および第２ホルダの第２貫通穴のうちの少なくとも一方を利用して、第１ホルダと第２ホルダとを相対回転可能に連結するラジアル軸受が設けられている。このため、第１コイルと第２コイルの位置関係をラジアル軸受によって適正な状態とすることができるので、第１コイルと第２コイルとの間の電力の伝送効率を高めることができる。   In the present invention, a radial bearing that connects at least one of the first through hole of the first holder and the second through hole of the second holder so that the first holder and the second holder are relatively rotatable is provided. Is provided. For this reason, since the positional relationship between the first coil and the second coil can be brought into an appropriate state by the radial bearing, the power transmission efficiency between the first coil and the second coil can be increased.

本発明を適用した非接触電力伝送装置の斜視図である。It is a perspective view of the non-contact power transmission device to which the present invention is applied. 本発明を適用した非接触電力伝送装置の断面図である。It is sectional drawing of the non-contact electric power transmission apparatus to which this invention is applied. 本発明を適用した非接触電力伝送装置の分解斜視図である。It is a disassembled perspective view of the non-contact electric power transmission apparatus to which this invention is applied. 図１に示す固定ユニットの分解斜視図である。It is a disassembled perspective view of the fixing unit shown in FIG. 図４に示す第１ホルダの内部の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure inside the 1st holder shown in FIG. 図１に示す可動ユニットの分解斜視図である。It is a disassembled perspective view of the movable unit shown in FIG. 図６に示す第２ホルダの内部の構成を示す分解斜視図である。It is a disassembled perspective view which shows the structure inside the 2nd holder shown in FIG. 本発明を適用した非接触電力伝送装置に用いた光通信用の光学素子の説明図である。It is explanatory drawing of the optical element for optical communications used for the non-contact electric power transmission apparatus to which this invention is applied. 本発明を適用した非接触電力伝送装置に光通信用の光学素子の位置を示す説明図である。It is explanatory drawing which shows the position of the optical element for optical communications in the non-contact electric power transmission apparatus to which this invention is applied.

以下、図面を参照して、本発明を適用した非接触電力伝送装置を説明する。なお、以下
の説明では、第１ホルダ１０と第２ホルダ２０とが軸線Ｌ周りに相対回転する場合を例示する。また、以下の説明では、軸線Ｌ方向において、第１ホルダ１０が位置する側を一方側Ｌ１とし、第２ホルダ２０が位置する側を他方側Ｌ２として説明する。 Hereinafter, a non-contact power transmission apparatus to which the present invention is applied will be described with reference to the drawings. In addition, in the following description, the case where the 1st holder 10 and the 2nd holder 20 rotate around the axis line L is illustrated. In the following description, in the axis L direction, the side on which the first holder 10 is located will be described as one side L1, and the side on which the second holder 20 is located will be described as the other side L2.

（全体構成）
図１は、本発明を適用した非接触電力伝送装置の斜視図であり、図１（ａ）、（ｂ）は、非接触電力伝送装置を軸線Ｌ方向の他方側Ｌ２からみた斜視図、および軸線Ｌ方向の一方側Ｌ１からみた斜視図である。図２は、本発明を適用した非接触電力伝送装置の断面図である。図３は、本発明を適用した非接触電力伝送装置の分解斜視図である。 (overall structure)
FIG. 1 is a perspective view of a non-contact power transmission apparatus to which the present invention is applied, and FIGS. 1A and 1B are perspective views of the non-contact power transmission apparatus as viewed from the other side L2 in the axis L direction; It is the perspective view seen from the one side L1 of the axis line L direction. FIG. 2 is a cross-sectional view of a non-contact power transmission apparatus to which the present invention is applied. FIG. 3 is an exploded perspective view of a non-contact power transmission apparatus to which the present invention is applied.

図１、図２および図３において、非接触電力伝送装置１は、軸線Ｌ方向の一方側Ｌ１に配置された第１ホルダ１０と、軸線Ｌ方向の他方側Ｌ２に配置された第２ホルダ２０とを有している。本形態において、第１ホルダ１０側は固定ユニット６として構成され、第２ホルダ２０側は、軸線Ｌ周りに回転する可動ユニット７として構成されている。また、第１ホルダ１０と第２ホルダ２０は、第１カラー９６、第２カラー９７、およびラジアル軸受９０（ボールベアリング）を介して相対回転可能に連結されている。より具体的には、第２カラー９７は、ラジアル軸受９０の外輪９１の軸線Ｌ方向の他方側Ｌ２の端部に被さった状態で第１ホルダ１０にねじ９７１によって固定されている。これに対して、第１カラー９６は、ラジアル軸受９０の内輪９２の軸線Ｌ方向の一方側Ｌ１の端部に被さった状態で第２ホルダ２０にねじ９６１によって固定されている。このため、ラジアル軸受９０によって、固定ユニット６（第１ホルダ１０）と可動ユニット７（第２ホルダ２０）との軸線Ｌ方向の相対位置を規定することができるので、固定ユニット６（第１ホルダ１０）と可動ユニット７（第２ホルダ２０）との間に適正な間隙を確保することができる。   1, 2 and 3, the non-contact power transmission device 1 includes a first holder 10 disposed on one side L1 in the axis L direction and a second holder 20 disposed on the other side L2 in the axis L direction. And have. In this embodiment, the first holder 10 side is configured as a fixed unit 6, and the second holder 20 side is configured as a movable unit 7 that rotates about the axis L. The first holder 10 and the second holder 20 are connected to each other via a first collar 96, a second collar 97, and a radial bearing 90 (ball bearing) so as to be relatively rotatable. More specifically, the second collar 97 is fixed to the first holder 10 with a screw 971 in a state of covering the end of the outer side 91 of the radial bearing 90 on the other side L2 in the axis L direction. On the other hand, the first collar 96 is fixed to the second holder 20 with a screw 961 in a state of covering the end portion on the one side L1 in the axis L direction of the inner ring 92 of the radial bearing 90. For this reason, since the radial bearing 90 can define the relative position of the fixed unit 6 (first holder 10) and the movable unit 7 (second holder 20) in the direction of the axis L, the fixed unit 6 (first holder 10) 10) and an appropriate gap can be secured between the movable unit 7 (second holder 20).

（固定ユニット６の構成）
図４は、図１に示す固定ユニット６の分解斜視図であり、図４（ａ）、（ｂ）は、固定ユニット６において第１ホルダ１０から第１基板１２等を外した状態の分解斜視図、および第１ホルダ１０からカバー１９１を外した状態の分解斜視図である。図５は、図４に示す第１ホルダ１０の内部の構成を示す分解斜視図であり、図５（ａ）、（ｂ）は、第１ホルダ１０から第１コイル１３等を外した状態の分解斜視図、および第１ホルダ１０から第１コア１５等も外した状態の分解斜視図である。 (Configuration of fixed unit 6)
4 is an exploded perspective view of the fixed unit 6 shown in FIG. 1. FIGS. 4A and 4B are exploded perspective views of the fixed unit 6 with the first substrate 12 and the like removed from the first holder 10. FIG. FIG. 2 is an exploded perspective view of the first holder 10 with a cover 191 removed. 5 is an exploded perspective view showing an internal configuration of the first holder 10 shown in FIG. 4. FIGS. 5A and 5B show a state in which the first coil 13 and the like are removed from the first holder 10. FIG. 2 is an exploded perspective view and an exploded perspective view of the first holder 10 with the first core 15 and the like removed.

図４に示すように、第１ホルダ１０の軸線Ｌ方向の一方側Ｌ１には第１基板１２およびカバーフィルム１９２がねじ１９３によって固定されている。第１基板１２の中央には穴１２１が形成されており、第１基板１２の軸線Ｌ方向の他方側Ｌ２に向く第１面１２ａには、穴１２１の周りに光通信用の第１光学素子１４１が設けられている。また、第１基板１２の外縁には、軸線Ｌ方向の他方側Ｌ２に発光面を向けて回転検出用の受光素子１４３が設けられている。また、第１基板１２の軸線Ｌ方向の一方側Ｌ１に向く第２面１２ｂには、コネクタ１４９が実装されている。このため、カバーフィルム１９２には、コネクタ１４９と重なる位置に開口部１９２ａが形成されており、中央には穴１９２ｂが形成されている。   As shown in FIG. 4, the first substrate 12 and the cover film 192 are fixed to the one side L <b> 1 of the first holder 10 in the axis L direction by screws 193. A hole 121 is formed in the center of the first substrate 12, and a first optical element for optical communication around the hole 121 is formed on the first surface 12 a facing the other side L <b> 2 in the axis L direction of the first substrate 12. 141 is provided. A light receiving element 143 for detecting rotation is provided on the outer edge of the first substrate 12 with the light emitting surface facing the other side L2 in the axis L direction. A connector 149 is mounted on the second surface 12b facing the one side L1 in the axis L direction of the first substrate 12. For this reason, the cover film 192 has an opening 192a at a position overlapping the connector 149, and a hole 192b is formed at the center.

本形態において、第１光学素子１４１は、周方向で離間する位置に配置された３つの発光素子１４１ａと１つの受光素子１４１ｂとからなる。ここで、発光素子１４１ａは、発光面を軸線Ｌ方向の他方側Ｌ２に発光面を向けて第１基板１２の第１面１２ａに実装されている。これに対して、受光素子１４１ｂは、第１基板１２の第２面１２ｂに実装されているが、受光素子１４１ｂの受光面は、第１基板１２に形成された穴を介して軸線Ｌ方向の他方側Ｌ２に露出している。   In this embodiment, the first optical element 141 includes three light emitting elements 141a and one light receiving element 141b that are arranged at positions spaced apart in the circumferential direction. Here, the light emitting element 141a is mounted on the first surface 12a of the first substrate 12 with the light emitting surface facing the other side L2 in the axis L direction. On the other hand, the light receiving element 141b is mounted on the second surface 12b of the first substrate 12, but the light receiving surface of the light receiving element 141b is arranged in the direction of the axis L through the hole formed in the first substrate 12. It is exposed on the other side L2.

図３、図４および図５に示すように、第１ホルダ１０の軸線Ｌ方向の他方側Ｌ２には、
第１コア１５、第１コイル１３、および非磁性の円環状のカバー１９１が重ねて配置されている。第１ホルダ１０は、円形形状の底板部１０１と、底板部１０１の外周縁から軸線Ｌ方向の他方側Ｌ２に屈曲した円筒状の側板部１０２とを有している。また、底板部１０１の中央には第１円筒部１０３が形成されており、第１円筒部１０３の内側は第１貫通穴１０４になっている。かかる第１貫通穴１０４には、ラジアル軸受９０（ボールベアリング）が配置されており、ラジアル軸受９０は、第１カラー９６および第２カラー９７を介して、第１ホルダ１０と第２ホルダ２０とを同心状態で連結する中心部材である。 As shown in FIGS. 3, 4 and 5, the other side L2 of the first holder 10 in the direction of the axis L is
The first core 15, the first coil 13, and the nonmagnetic annular cover 191 are disposed so as to overlap each other. The first holder 10 includes a circular bottom plate portion 101 and a cylindrical side plate portion 102 bent from the outer peripheral edge of the bottom plate portion 101 to the other side L2 in the axis L direction. A first cylindrical portion 103 is formed at the center of the bottom plate portion 101, and a first through hole 104 is formed inside the first cylindrical portion 103. A radial bearing 90 (ball bearing) is disposed in the first through hole 104, and the radial bearing 90 is connected to the first holder 10 and the second holder 20 via the first collar 96 and the second collar 97. Is a central member that connects the two in a concentric state.

また、第１円筒部１０３においては、内周部分から軸線Ｌ方向の一方側Ｌ１に向けて延在する筒状端部１０８（図１（ｂ）参照）が突出しており、筒状端部１０８は、第１基板１２の穴１２１に嵌っている。側板部１０２の外面には、固定ユニット６を取り付けるための連結部１０２ｃが形成されている。底板部１０１の軸線Ｌ方向の他方側Ｌ２の面には、第１円筒部１０３と側板部１０２とを繋ぐリブ１０５が周方向において等角度間隔の４個所に形成されており、リブ１０５によって周方向で挟まれた領域には位置決め用の突起１０６が形成されている。また、リブ１０５の両端には突起１０７ａ、１０７ｂが形成されている。また、底板部１０１には、円筒部１０３の内側に環状段部１０９が形成されており、かかる環状段部１０９は、ラジアル軸受９０の外輪９１が軸線Ｌ方向の一方側Ｌ１に抜けるのを防止している。   Further, in the first cylindrical portion 103, a cylindrical end portion 108 (see FIG. 1B) extending from the inner peripheral portion toward the one side L1 in the axis L direction protrudes, and the cylindrical end portion 108 is projected. Is fitted in the hole 121 of the first substrate 12. A connecting portion 102 c for attaching the fixing unit 6 is formed on the outer surface of the side plate portion 102. Ribs 105 that connect the first cylindrical portion 103 and the side plate portion 102 are formed at four equiangular intervals in the circumferential direction on the surface of the bottom plate portion 101 on the other side L2 in the axis L direction. A positioning projection 106 is formed in a region sandwiched in the direction. In addition, protrusions 107 a and 107 b are formed on both ends of the rib 105. Further, the bottom plate portion 101 is formed with an annular step portion 109 inside the cylindrical portion 103. The annular step portion 109 prevents the outer ring 91 of the radial bearing 90 from slipping out to the one side L1 in the axis L direction. doing.

第１コイル１３は、円環状に巻回された扁平コイルであり、第１円筒部１０３および第１貫通穴１０４を中心に周回するように配置されている。第１コイル１３に対して、軸線Ｌ方向の一方側Ｌ１には円環状の第１コア１５が配置されている。第１コイル１３と第１コア１５との間には接着剤層が介在している。   The first coil 13 is a flat coil wound in an annular shape, and is arranged to circulate around the first cylindrical portion 103 and the first through hole 104. An annular first core 15 is arranged on one side L1 in the axis L direction with respect to the first coil 13. An adhesive layer is interposed between the first coil 13 and the first core 15.

第１コア１５は、第１コイル１３に対して軸線Ｌ方向の一方側Ｌ１で重なる底板部１５１と、底板部１５１の内縁から突出して第１コイル１３の内周部分に径方向内側で重なる内板部１５２と、底板部１５１の外縁から突出して第１コイル１３の外周部分に径方向外側で重なる外板部１５３とを有している。底板部１５１には穴１５１ａが形成されており、穴１５１ａには突起１０６が嵌ることにより第１コア１５の位置決めが行われている。   The first core 15 protrudes from the inner edge of the bottom plate portion 151 and overlaps the inner peripheral portion of the first coil 13 on the inner side in the radial direction, with the bottom plate portion 151 overlapping the first coil 13 on one side L1 in the axis L direction. A plate portion 152 and an outer plate portion 153 that protrudes from the outer edge of the bottom plate portion 151 and overlaps the outer peripheral portion of the first coil 13 on the outer side in the radial direction are provided. A hole 151a is formed in the bottom plate portion 151, and the first core 15 is positioned by fitting a projection 106 into the hole 151a.

第１コア１５は、周方向に分割された分割コアである。本形態において、第１コア１５は、等角度間隔に４分割されており、４つのコア片１５０が周方向に等角度間隔で配置されている。かかるコア片１５０は、周方向の両端が突起１０７ａ、１０７ｂによって位置決めされている。この状態で、第１コイル１３の端部１３０は、コア片１５０の間を通って、第１コア１５に対して第１コイル１３とは反対側に配置された第１基板１２まで引き出されている。   The first core 15 is a divided core divided in the circumferential direction. In this embodiment, the first core 15 is divided into four at equal angular intervals, and four core pieces 150 are arranged at equal angular intervals in the circumferential direction. The core piece 150 is positioned at both ends in the circumferential direction by the protrusions 107a and 107b. In this state, the end portion 130 of the first coil 13 passes between the core pieces 150 and is drawn out to the first substrate 12 disposed on the opposite side of the first coil 15 with respect to the first core 15. Yes.

このように構成した第１コア１５において、内板部１５２の厚さは、外板部１５３の厚さより厚い。本形態において、第１コア１５（コア片１５０）は、エポキシ樹脂等の熱硬化性樹脂によって磁性粉を固めてなる。   In the first core 15 configured as described above, the thickness of the inner plate portion 152 is thicker than the thickness of the outer plate portion 153. In this embodiment, the first core 15 (core piece 150) is formed by solidifying magnetic powder with a thermosetting resin such as an epoxy resin.

（可動ユニット７の構成）
図６は、図１に示す可動ユニット７の分解斜視図であり、図６（ａ）、（ｂ）は、可動ユニット７において第２ホルダ２０から第２基板２２等を外した状態の分解斜視図、および第２ホルダ２０からカバー２９１を外した状態の分解斜視図である。図７は、図６に示す第２ホルダ２０の内部の構成を示す分解斜視図であり、図７（ａ）、（ｂ）は、第２ホルダ２０から第２コイル２３等を外した状態の分解斜視図、および第２ホルダ２０から第２コア２５等も外した状態の分解斜視図である。 (Configuration of movable unit 7)
6 is an exploded perspective view of the movable unit 7 shown in FIG. 1. FIGS. 6A and 6B are exploded perspective views of the movable unit 7 with the second substrate 22 and the like removed from the second holder 20. FIG. FIG. 4 is an exploded perspective view of the second holder 20 with a cover 291 removed. 7 is an exploded perspective view showing the internal configuration of the second holder 20 shown in FIG. 6. FIGS. 7A and 7B show the state in which the second coil 23 and the like are removed from the second holder 20. FIG. 6 is an exploded perspective view and an exploded perspective view of the second holder 20 with the second core 25 and the like removed.

図６に示すように、第２ホルダ２０の軸線Ｌ方向の他方側Ｌ２には第２基板２２および
カバーフィルム２９２がねじ２９３によって固定されている。第２基板２２の中央には穴２２１が形成されており、第２基板２２の軸線Ｌ方向の一方側Ｌ１に向く第１面２２ａには、穴２２１の周りに光通信用の第２光学素子２４１が設けられている。また、第２基板２２の外縁には、軸線Ｌ方向の一方側Ｌ１に受光面を向けて回転検出用の発光素子２４３が設けられている。また、第２基板２２の軸線Ｌ方向の他方側Ｌ２に向く第２面２２ｂには、コネクタ２４９が実装されている。このため、カバーフィルム２９２には、コネクタ２４９と重なる位置に開口部２９２ａが形成されており、中央には穴２９２ｂが形成されている。 As shown in FIG. 6, the second substrate 22 and the cover film 292 are fixed to the other side L <b> 2 of the second holder 20 in the axis L direction by screws 293. A hole 221 is formed at the center of the second substrate 22, and a second optical element for optical communication around the hole 221 is formed on the first surface 22 a facing the one side L 1 in the axis L direction of the second substrate 22. 241 is provided. In addition, a light-emitting element 243 for rotation detection is provided on the outer edge of the second substrate 22 with the light-receiving surface facing one side L1 in the axis L direction. A connector 249 is mounted on the second surface 22b facing the other side L2 of the second substrate 22 in the axis L direction. For this reason, an opening 292a is formed in the cover film 292 so as to overlap with the connector 249, and a hole 292b is formed in the center.

本形態において、第２光学素子２４１は、周方向で離間する位置に配置された３つの発光素子２４１ａと１つの受光素子２４１ｂとからなる。ここで、発光素子２４１ａは、発光面を軸線Ｌ方向の一方側Ｌ１に発光面を向けて第２基板２２の第１面２２ａに実装されている。これに対して、受光素子２４１ｂは、第２基板２２の第２面２２ｂに実装されているが、受光素子２４１ｂの受光面は、第２基板２２に形成された穴を介して軸線Ｌ方向の一方側Ｌ１に露出している。   In the present embodiment, the second optical element 241 includes three light emitting elements 241a and one light receiving element 241b arranged at positions spaced apart in the circumferential direction. Here, the light emitting element 241a is mounted on the first surface 22a of the second substrate 22 with the light emitting surface facing the one side L1 in the axis L direction. On the other hand, the light receiving element 241 b is mounted on the second surface 22 b of the second substrate 22, but the light receiving surface of the light receiving element 241 b extends in the axis L direction through a hole formed in the second substrate 22. It is exposed on one side L1.

図６および図７に示すように、第２ホルダ２０の軸線Ｌ方向の一方側Ｌ１には、第２コア２５、第２コイル２３、および非磁性の円環状のカバー２９１が重ねて配置されている。第２ホルダ２０は、円形形状の底板部２０１と、底板部２０１の外周縁から軸線Ｌ方向の一方側Ｌ１に屈曲した円筒状の側板部２０２とを有している。また、底板部２０１の中央には第２円筒部２０３が形成されており、第２円筒部２０３の内側には、円形の第２貫通穴２０４が形成された筒状胴部２０９が形成されている。第２貫通穴２０４は、第２ホルダ２０を軸線Ｌ方向で貫通しており、軸線Ｌ方向の他方側Ｌ２の端部は角穴（図１（ａ）参照）になっている。このため、貫通穴２０４を利用して回転軸を連結することができる。筒状胴部２０９は、底板部２０１から軸線Ｌ方向の他方側Ｌ２に向けて突出し、第２基板２２の穴２２１に嵌っている。側板部２０２の外面には、可動ユニット７を取り付けるための連結部２０２ｃが形成されている。   As shown in FIGS. 6 and 7, the second core 25, the second coil 23, and the non-magnetic annular cover 291 are arranged on one side L <b> 1 of the second holder 20 in the axis L direction. Yes. The second holder 20 has a circular bottom plate portion 201 and a cylindrical side plate portion 202 bent from the outer peripheral edge of the bottom plate portion 201 to one side L1 in the axis L direction. In addition, a second cylindrical portion 203 is formed at the center of the bottom plate portion 201, and a cylindrical body portion 209 having a circular second through hole 204 is formed inside the second cylindrical portion 203. Yes. The 2nd penetration hole 204 has penetrated the 2nd holder 20 in the direction of an axis L, and the end of the other side L2 of the direction of an axis L is a square hole (refer to Drawing 1 (a)). For this reason, a rotating shaft can be connected using the through hole 204. The cylindrical body portion 209 protrudes from the bottom plate portion 201 toward the other side L2 in the direction of the axis L, and fits into the hole 221 of the second substrate 22. A connecting portion 202 c for attaching the movable unit 7 is formed on the outer surface of the side plate portion 202.

底板部２０１の軸線Ｌ方向の一方側Ｌ１の面には、第２円筒部２０３と側板部２０２とを繋ぐ連結部２０５が周方向において等角度間隔の３個所に形成されており、連結部２０５によって周方向で挟まれた領域には位置決め用の突起２０６が形成されている。また、底板部２０１の第２円筒部２０３付近および側板部２０２付近には突起２０７ａ、２０７ｂが形成されている。また、底板部２０１では、第２円筒部２０３と第２貫通穴２０４との間に環状段部２０８が形成されており、かかる環状段部２０８は、図２に示すラジアル軸受９０の内輪９２に当接して内輪９２が軸線Ｌ方向の他方側Ｌ２に抜けるのを防止している。   On the surface of one side L1 in the axis L direction of the bottom plate portion 201, connecting portions 205 that connect the second cylindrical portion 203 and the side plate portion 202 are formed at three equiangular intervals in the circumferential direction. A positioning projection 206 is formed in a region sandwiched by the circumferential direction. Protrusions 207 a and 207 b are formed in the vicinity of the second cylindrical portion 203 and the side plate portion 202 of the bottom plate portion 201. Further, in the bottom plate portion 201, an annular step portion 208 is formed between the second cylindrical portion 203 and the second through hole 204, and the annular step portion 208 is formed on the inner ring 92 of the radial bearing 90 shown in FIG. This prevents the inner ring 92 from coming off to the other side L2 in the axis L direction.

第２コイル２３は、円環状に巻回された偏平コイルであり、第２円筒部２０３、筒状胴部２０９および第２貫通穴２０４を中心に周回するように配置されている。第２コイル２３に対して、軸線Ｌ方向の他方側Ｌ２には円環状の第２コア２５が配置されている。第２コイル２３と第２コア２５との間には接着剤層が介在している。   The second coil 23 is a flat coil wound in an annular shape, and is arranged to circulate around the second cylindrical portion 203, the cylindrical body portion 209, and the second through hole 204. An annular second core 25 is disposed on the other side L2 in the axis L direction with respect to the second coil 23. An adhesive layer is interposed between the second coil 23 and the second core 25.

第２コア２５は、第２コイル２３に対して軸線Ｌ方向の他方側Ｌ２で重なる底板部２５１と、底板部２５１の内縁から突出して第２コイル２３の内周部分に径方向内側で重なる内板部２５２と、底板部２５１の外縁から突出して第２コイル２３の外周部分に径方向外側で重なる外板部２５３とを有している。底板部２５１には穴２５１ａが形成されており、穴２５１ａに突起２０６が嵌ることにより第２コア２５の位置決めが行われている。   The second core 25 includes a bottom plate portion 251 that overlaps the second coil 23 on the other side L2 in the axis L direction, and an inner portion that protrudes from the inner edge of the bottom plate portion 251 and overlaps the inner peripheral portion of the second coil 23 in the radial direction. A plate portion 252 and an outer plate portion 253 that protrudes from the outer edge of the bottom plate portion 251 and overlaps with the outer peripheral portion of the second coil 23 on the radially outer side. A hole 251a is formed in the bottom plate portion 251, and the positioning of the second core 25 is performed by fitting the projection 206 into the hole 251a.

第２コア２５は、周方向に分割された分割コアである。本形態において、第２コア２５は、等角度間隔に３分割されており、３つのコア片２５０が周方向に等角度間隔で配置さ
れている。かかるコア片２５０は、周方向の両端が突起２０７ａ、２０７ｂによって位置決めされている。この状態で、第２コイル２３の端部２３０は、コア片２５０の間を通って、第２コア２５に対して第２コイル２３とは反対側に配置された第２基板２２まで引き出されている。また、本形態では、第１コア１５を４分割し、第２コア２５を３分割したため、第１コア１５のコア片１５０の隙間と、第２コア２５のコア片２５０の隙間が複数個所で重なることがない。それ故、磁気的な特性の変動を抑えることができる。 The second core 25 is a divided core divided in the circumferential direction. In this embodiment, the second core 25 is divided into three at equal angular intervals, and three core pieces 250 are arranged at equal angular intervals in the circumferential direction. The core piece 250 is positioned at both ends in the circumferential direction by the protrusions 207a and 207b. In this state, the end 230 of the second coil 23 passes between the core pieces 250 and is drawn to the second substrate 22 disposed on the opposite side of the second coil 25 from the second coil 23. Yes. In this embodiment, since the first core 15 is divided into four and the second core 25 is divided into three, the gap between the core piece 150 of the first core 15 and the gap between the core pieces 250 of the second core 25 are plural. There is no overlap. Therefore, fluctuations in magnetic characteristics can be suppressed.

このように構成した第２コア２５において、内板部２５２の厚さは、外板部２５３の厚さより厚い。本形態において、第２コア２５（コア片２５０）は、エポキシ樹脂等の熱硬化性樹脂によって磁性粉を固めてなる。   In the second core 25 configured as above, the thickness of the inner plate portion 252 is thicker than the thickness of the outer plate portion 253. In this embodiment, the second core 25 (core piece 250) is formed by solidifying magnetic powder with a thermosetting resin such as an epoxy resin.

このように構成した可動ユニット７において、第２ホルダ２０に保持された第２コイル２３および第２コア２５は、固定ユニット６において、第１ホルダ１０に保持された第１コイル１３および第１コア１５と軸線Ｌ方向で近接した状態で対向する。また、可動ユニット７は、第１ホルダ１０の第１貫通穴１０４に配置されたラジアル軸受９０を中心に回転する。従って、第１コイル１３に通電すれば、第２コイル２３および第２コア２５と、第１コイル１３および第１コア１５との間の磁気的な結合によって、第２コイル２３に起電力を誘起させることができる。それ故、固定ユニット６から可動ユニット７に電力を伝送することができる。   In the movable unit 7 configured as described above, the second coil 23 and the second core 25 held by the second holder 20 are the same as the first coil 13 and the first core held by the first holder 10 in the fixed unit 6. 15 and facing in the axial L direction. The movable unit 7 rotates around a radial bearing 90 disposed in the first through hole 104 of the first holder 10. Therefore, if the first coil 13 is energized, an electromotive force is induced in the second coil 23 by magnetic coupling between the second coil 23 and the second core 25 and the first coil 13 and the first core 15. Can be made. Therefore, power can be transmitted from the fixed unit 6 to the movable unit 7.

（光通信のための構成）
図８は、本発明を適用した非接触電力伝送装置１に用いた光通信用の光学素子の説明図であり、図８（ａ）、（ｂ）は、第１基板１２と第２基板２２とを軸線Ｌ方向の他方側Ｌ２からみた斜視図、および第１基板１２と第２基板２２とを軸線Ｌ方向の一方側Ｌ１からみた斜視図である。図９は、本発明を適用した非接触電力伝送装置１に光通信用の光学素子の位置を示す説明図であり、図９（ａ）、（ｂ）は、第２ホルダ２０を軸線Ｌ方向の他方側Ｌ２からみた斜視図、および第１ホルダ１０を軸線Ｌ方向の一方側Ｌ１からみた斜視図である。 (Configuration for optical communication)
FIG. 8 is an explanatory diagram of an optical element for optical communication used in the non-contact power transmission apparatus 1 to which the present invention is applied. FIGS. 8A and 8B show the first substrate 12 and the second substrate 22. 2 is a perspective view of the first substrate 12 and the second substrate 22 as viewed from one side L1 in the axis L direction. FIGS. 9A and 9B are explanatory views showing the positions of optical elements for optical communication in the non-contact power transmission apparatus 1 to which the present invention is applied. FIGS. 9A and 9B show the second holder 20 in the direction of the axis L. They are the perspective view seen from the other side L2, and the perspective view which looked at the 1st holder 10 from the one side L1 of the axis line L direction.

図８に示すように、第１基板１２の軸線Ｌ方向の他方側Ｌ２に向く第１面１２ａには、軸線Ｌ（穴１２１）から等距離の位置に光通信用の第１光学素子１４１（発光素子１４１ａおよび受光素子１４１ｂ）が設けられており、第２基板２２の軸線Ｌ方向の一方側Ｌ１に向く第１面２２ａには、軸線Ｌ（穴２２１）から等距離の位置に光通信用の第２光学素子２４１（発光素子２４１ａおよび受光素子２４１ｂ）が設けられている。また、第１基板１２の軸線Ｌ方向の一方側Ｌ１に向く第２面１２ｂには各種電子部品１４４が実装され、第２基板２２の軸線Ｌ方向の他方側Ｌ２に向く第２面２２ｂには各種電子部品２４４が実装されている。   As shown in FIG. 8, on the first surface 12a facing the other side L2 in the direction of the axis L of the first substrate 12, the first optical element 141 (for optical communication) at a position equidistant from the axis L (hole 121). The light emitting element 141a and the light receiving element 141b) are provided, and the first surface 22a facing the one side L1 in the axis L direction of the second substrate 22 is disposed at an equidistant position from the axis L (hole 221). The second optical element 241 (light emitting element 241a and light receiving element 241b) is provided. Various electronic components 144 are mounted on the second surface 12b facing the one side L1 in the axis L direction of the first substrate 12, and on the second surface 22b facing the other side L2 of the second substrate 22 in the axis L direction. Various electronic components 244 are mounted.

ここで、軸線Ｌから第１光学素子１４１（発光素子１４１ａおよび受光素子１４１ｂ）までの距離は、軸線Ｌから第２光学素子２４１（発光素子２４１ａおよび受光素子２４１ｂ）までの距離と等しい。このため、可動ユニット７が軸線Ｌ周りに回転した際、第２光学素子２４１（発光素子２４１ａおよび受光素子２４１ｂ）は、第１光学素子１４１（発光素子１４１ａおよび受光素子１４１ｂ）に対して軸線Ｌ方向で重なる位置を通過する。   Here, the distance from the axis L to the first optical element 141 (light emitting element 141a and light receiving element 141b) is equal to the distance from the axis L to the second optical element 241 (light emitting element 241a and light receiving element 241b). For this reason, when the movable unit 7 rotates around the axis L, the second optical element 241 (the light emitting element 241a and the light receiving element 241b) has an axis L relative to the first optical element 141 (the light emitting element 141a and the light receiving element 141b). Pass through the overlapping position in the direction.

かかる構成の第１基板１２は、図９（ｂ）に示す第１ホルダ１０の底板部１０１に対して軸線Ｌ方向の一方側Ｌ１で重なる。第１ホルダ１０の底板部１０１において軸線Ｌ方向の一方側Ｌ１には、発光素子１４１ａと重なる位置に凹部１０１ｅが形成され、受光素子１４１ｂと重なる位置に凹部１０１ｆが形成されている。本形態において、凹部１０１ｅ、１０１ｆは、第１ホルダ１０の第１円筒部１０３と重なる位置に形成されている。   The first substrate 12 having such a configuration overlaps with the bottom plate portion 101 of the first holder 10 shown in FIG. 9B on one side L1 in the axis L direction. On one side L1 in the direction of the axis L in the bottom plate portion 101 of the first holder 10, a recess 101e is formed at a position overlapping the light emitting element 141a, and a recess 101f is formed at a position overlapping the light receiving element 141b. In this embodiment, the recesses 101e and 101f are formed at positions overlapping the first cylindrical portion 103 of the first holder 10.

また、図８に示す第２基板２２は、図９（ａ）に示す第２ホルダ２０の底板部２０１に対して軸線Ｌ方向の他方側Ｌ２で重なる。第２ホルダ２０の底板部２０１において軸線Ｌ方向の他方側Ｌ２には、発光素子２４１ａと重なる位置に凹部２０１ｅが形成され、受光素子２４１ｂと重なる位置に凹部２０１ｆが形成されている。本形態において、凹部２０１ｅ、２０１ｆは、第２ホルダ２０の第２円筒部２０３と重なる位置に形成されている。   Further, the second substrate 22 shown in FIG. 8 overlaps the bottom plate portion 201 of the second holder 20 shown in FIG. 9A on the other side L2 in the axis L direction. On the other side L2 in the axis L direction of the bottom plate portion 201 of the second holder 20, a recess 201e is formed at a position overlapping the light emitting element 241a, and a recess 201f is formed at a position overlapping the light receiving element 241b. In this embodiment, the recesses 201e and 201f are formed at positions that overlap the second cylindrical portion 203 of the second holder 20.

ここで、第１ホルダ１０では、第１円筒部１０３が底板部１０１から第２ホルダ２０に向けて突出し、第２ホルダ２０では、第２円筒部２０３が底板部２０１から第１ホルダ１０に向けて突出し、第１円筒部１０３と第２円筒部２０３とは先端部同士が軸線Ｌ方向で対向している。   Here, in the first holder 10, the first cylindrical portion 103 protrudes from the bottom plate portion 101 toward the second holder 20, and in the second holder 20, the second cylindrical portion 203 extends from the bottom plate portion 201 toward the first holder 10. The first cylindrical portion 103 and the second cylindrical portion 203 are opposed to each other in the axis L direction.

また、第１ホルダ１０および第２ホルダ２０は、第１円筒部１０３および第２円筒部２０３を含めて全体が、発光素子１４１ａ、２４１ａが出射する光（光通信に用いる光）に対して透光性を有している。従って、固定ユニット６側の発光素子１４１ａから出射された光は、第１ホルダ１０の第１円筒部１０３、および第２ホルダ２０の第２円筒部２０３を導光路として、可動ユニット７側の受光素子２４１ｂに到達する。また、可動ユニット７側の発光素子２４１ａから出射された光は、第２ホルダ２０の第２円筒部２０３、および第１ホルダ１０の第１円筒部１０３を導光路として、固定ユニット６側の受光素子１４１ｂに到達する。それ故、固定ユニット６（第１ホルダ１０の側）と可動ユニット７（第２ホルダ２０の側）との間では、第１ホルダ１０および第２ホルダ２０を導光路として双方向の光通信を行うことができる。すなわち、本形態によれば、第１ホルダ１０の第１貫通穴１０４、および第２ホルダ２０の第２貫通穴２０４を避けた位置において光通信を行うことができる。   The first holder 10 and the second holder 20 including the first cylindrical portion 103 and the second cylindrical portion 203 as a whole are transparent to the light emitted from the light emitting elements 141a and 241a (light used for optical communication). It has light properties. Therefore, the light emitted from the light emitting element 141a on the fixed unit 6 side is received on the movable unit 7 side using the first cylindrical portion 103 of the first holder 10 and the second cylindrical portion 203 of the second holder 20 as light guide paths. The element 241b is reached. The light emitted from the light emitting element 241a on the movable unit 7 side is received on the fixed unit 6 side by using the second cylindrical portion 203 of the second holder 20 and the first cylindrical portion 103 of the first holder 10 as a light guide path. It reaches the element 141b. Therefore, bidirectional optical communication is performed between the fixed unit 6 (first holder 10 side) and the movable unit 7 (second holder 20 side) using the first holder 10 and the second holder 20 as a light guide path. It can be carried out. That is, according to this embodiment, optical communication can be performed at a position avoiding the first through hole 104 of the first holder 10 and the second through hole 204 of the second holder 20.

なお、本形態において、第１ホルダ１０の第１円筒部１０３はカバー１９１の穴の内側に位置し、第２ホルダ２０の第２円筒部２０３はカバー２９１の穴の内側に位置しており、光通信用の光はカバー１９１、２９１の内側を通るようになっている。但し、第１ホルダ１０の第１円筒部１０３と第２ホルダ２０の第２円筒部２０３との間にカバー１９１、２９１が介在している構成であってもよく、この場合、カバー１９１、２９１が発光素子１４１ａ、２４１ａが出射する光（光通信に用いる光）に対して透光性を有している構成とする。   In this embodiment, the first cylindrical portion 103 of the first holder 10 is located inside the hole of the cover 191, the second cylindrical portion 203 of the second holder 20 is located inside the hole of the cover 291, The light for optical communication passes through the inside of the covers 191 and 291. However, the cover 191 and 291 may be interposed between the first cylindrical portion 103 of the first holder 10 and the second cylindrical portion 203 of the second holder 20. In this case, the covers 191 and 291 may be used. Has a light-transmitting property with respect to light emitted from the light-emitting elements 141a and 241a (light used for optical communication).

（本形態の主な効果）
以上説明したように、本形態の非接触電力伝送装置１は、第１貫通穴１０４が形成された第１ホルダ１０と、第２貫通穴２０４が形成された第２ホルダ２０とを有し、第１ホルダ１０に保持された第１コイル１３および第２ホルダ２０に保持された第２コイル２３は、第１貫通穴１０４および第２貫通穴２０４を中心に周回している。このため、第１貫通穴１０４と第２貫通穴２０４とを基準に第１ホルダ１０と第２ホルダ２０とを位置決めすれば、第１コイル１３と第２コイル２３との間で電力の伝送を適正に行うことができる。また、第１ホルダ１０に保持された光通信用の第１光学素子１４１と、第２ホルダ２０に保持された第２光学素子２４１とは、第１貫通穴１０４と第２貫通穴２０４とを避けた位置で光通信を行う。このため、第１貫通穴１０４と第２貫通穴２０４とを基準に第１ホルダ１０と第２ホルダ２０とを位置決めする場合でも光通信を適正に行うことができる。 (Main effects of this form)
As described above, the non-contact power transmission device 1 of the present embodiment includes the first holder 10 in which the first through hole 104 is formed and the second holder 20 in which the second through hole 204 is formed, The first coil 13 held by the first holder 10 and the second coil 23 held by the second holder 20 circulate around the first through hole 104 and the second through hole 204. For this reason, if the 1st holder 10 and the 2nd holder 20 are positioned on the basis of the 1st penetration hole 104 and the 2nd penetration hole 204, transmission of electric power between the 1st coil 13 and the 2nd coil 23 is carried out. It can be done properly. Further, the first optical element 141 for optical communication held by the first holder 10 and the second optical element 241 held by the second holder 20 include the first through hole 104 and the second through hole 204. Optical communication is performed at the avoided position. For this reason, even when positioning the 1st holder 10 and the 2nd holder 20 on the basis of the 1st through-hole 104 and the 2nd through-hole 204, optical communication can be performed appropriately.

すなわち、本形態では、第１貫通穴１０４および第２貫通穴２０４のうち、第１貫通穴１０４に第１貫通穴１０４および第２貫通穴２０４に対して同心状のラジアル軸受９０が中心部材として配置されている。このため、第１ホルダ１０および第２ホルダ２０は、ラジアル軸受９０（中心部材）を中心に相対回転する。従って、第１コイル１３と第２コイル２３の同心性を確保することができるので、第１コイル１３と第２コイル２３との間での電力の伝送効率を高めることができる。かかる構成を採用した場合には、第１貫通穴１
０４および第２貫通穴２０４を導光路として利用できなくなるが、本形態では、第１貫通穴１０４と第２貫通穴２０４とを避けた位置で光通信を行うため、光通信を適正に行うことができる。また、ラジアル軸受９０によって、固定ユニット６（第１ホルダ１０）と可動ユニット７（第２ホルダ２０）との軸線Ｌ方向の相対位置を規定することができるので、固定ユニット６（第１ホルダ１０）と可動ユニット７（第２ホルダ２０）との間に適正な間隙を確保することができる。それ故、第１コイル１３と第２コイル２３との間での電力の伝送効率を高めることができる。 That is, in the present embodiment, of the first through hole 104 and the second through hole 204, the radial bearing 90 concentric with the first through hole 104 and the second through hole 204 is used as the central member. Has been placed. For this reason, the 1st holder 10 and the 2nd holder 20 rotate relatively centering on the radial bearing 90 (center member). Therefore, since the concentricity of the first coil 13 and the second coil 23 can be ensured, the power transmission efficiency between the first coil 13 and the second coil 23 can be increased. When such a configuration is adopted, the first through hole 1
04 and the second through hole 204 cannot be used as a light guide path. In this embodiment, since optical communication is performed at a position avoiding the first through hole 104 and the second through hole 204, the optical communication is appropriately performed. Can do. Further, since the radial bearing 90 can define the relative position of the fixed unit 6 (first holder 10) and the movable unit 7 (second holder 20) in the direction of the axis L, the fixed unit 6 (first holder 10). ) And the movable unit 7 (second holder 20). Therefore, the power transmission efficiency between the first coil 13 and the second coil 23 can be increased.

また、軸線Ｌ方向からみたとき、光通信は、第１貫通穴１０４と第１コイル１３との間、および第２貫通穴２０４と第２コイル２３との間で行われる。このため、光の分散範囲が狭いので、光通信を確実に行うことができる。   Further, when viewed from the direction of the axis L, optical communication is performed between the first through hole 104 and the first coil 13 and between the second through hole 204 and the second coil 23. For this reason, since the dispersion range of light is narrow, optical communication can be performed reliably.

また、第１ホルダ１０および第２ホルダ２０は、光通信に用いられる光に対して透過性を有しているため、光通信の際の導光路として利用することができる。特に本形態では、第１ホルダ１０の第１円筒部１０３と、第１円筒部１０３と先端部同士が対向する第２ホルダ２０の第２円筒部２０３とを導光路として利用している。このため、第１貫通穴１０４と第２貫通穴２０４とを避けた位置で光通信を行う場合でも、導光路の構成を簡素化することができるとともに、確実な光通信を行うことができる。   Moreover, since the 1st holder 10 and the 2nd holder 20 have transparency with respect to the light used for optical communication, it can be utilized as a light guide path in the case of optical communication. In particular, in this embodiment, the first cylindrical portion 103 of the first holder 10 and the second cylindrical portion 203 of the second holder 20 whose front end faces the first cylindrical portion 103 are used as a light guide path. For this reason, even when optical communication is performed at a position avoiding the first through hole 104 and the second through hole 204, the configuration of the light guide path can be simplified and reliable optical communication can be performed.

また、本形態において、光通信は、１つの受光素子２４１ｂと複数の発光素子１４１ａとの間、および１つの受光素子１４１ｂと複数の発光素子２４１ａとの間で行われる。その際、複数の発光素子１４１ａは同一の光信号を出力し、複数の発光素子２４１ａは同一の光信号を出力する。このため、第１貫通穴１０４と第２貫通穴２０４とを避けた位置で光通信を行う場合でも、発光素子１４１ａが発した光が受光素子２４１ｂに確実に届き、発光素子２４１ａが発した光が受光素子１４１ｂに確実に届く。   In this embodiment, optical communication is performed between one light receiving element 241b and a plurality of light emitting elements 141a, and between one light receiving element 141b and a plurality of light emitting elements 241a. At that time, the plurality of light emitting elements 141a output the same optical signal, and the plurality of light emitting elements 241a output the same optical signal. For this reason, even when optical communication is performed at a position avoiding the first through hole 104 and the second through hole 204, the light emitted from the light emitting element 141a reliably reaches the light receiving element 241b and the light emitted from the light emitting element 241a. Surely reaches the light receiving element 141b.

また、本形態では、第１コイル１３に対して第２コイル２３側とは反対側に第１コア１５が配置され、２コイル２３に対して第１コイル１３側とは反対側に第２コア２５が配置されている。このため、第１コイル１３側と第２コイル２３側との磁気的な結合を強くすることができる。しかも、第１コア１５および第２コア２５では、内板部１５２、２５２の厚さが外板部１５３、２５３の厚さより厚い。このため、周長が短い内板部１５２、２５２で磁気飽和が発生することを抑制することができる。   In this embodiment, the first core 15 is disposed on the opposite side of the first coil 13 from the second coil 23 side, and the second core is disposed on the opposite side of the second coil 23 from the first coil 13 side. 25 is arranged. For this reason, the magnetic coupling between the first coil 13 side and the second coil 23 side can be strengthened. Moreover, in the first core 15 and the second core 25, the thickness of the inner plate portions 152 and 252 is thicker than the thickness of the outer plate portions 153 and 253. For this reason, it can suppress that magnetic saturation generate | occur | produces in the inner-plate parts 152 and 252 with short circumference.

また、第１コア１５および第２コア２５は分割コアであり、コア片１５０、２５０の間は、第１コイル１３の端部１３０および第２コイル２３の端部２３０の引き出しに利用されている。このため、第１コイル１３の端部１３０および第２コイル２３の端部２３０を引き回すための余計なスペースを削減することができる。   The first core 15 and the second core 25 are split cores, and the space between the core pieces 150 and 250 is used for drawing out the end portion 130 of the first coil 13 and the end portion 230 of the second coil 23. . For this reason, an extra space for routing the end portion 130 of the first coil 13 and the end portion 230 of the second coil 23 can be reduced.

また、第１コア１５および第２コア２５は、熱硬化性樹脂によって磁性粉を固めてなるため、焼結とは違って、高圧で圧縮する設備が不要であるなど、比較的、簡素な設備で製造することができる。   In addition, since the first core 15 and the second core 25 are made of a magnetic powder that is hardened by a thermosetting resin, unlike the sintering, there is no need for a facility for compressing at a high pressure. Can be manufactured.

また、第１ホルダ１０の第１円筒部１０３の径方向内側に環状段部１０９が形成され、第２ホルダ２０の第２円筒部２０３の径方向内側にも環状段部２０８が形成されている。このため、ラジアル軸受９０の外輪９１は、環状段部１０９によって抜け止めされ、ラジアル軸受９０の内輪９２は、環状段部２０８によって抜け止めされている。従って、可動ユニット７（第２ホルダ２０）を固定ユニット６（第１ホルダ１０）においてラジアル軸受９０を介して安定に支持することができる。また、ラジアル軸受９０によって、固定ユニット６（第１ホルダ１０）と可動ユニット７（第２ホルダ２０）との間に適正な間隙を確保することができる。   An annular step 109 is formed on the inner side in the radial direction of the first cylindrical portion 103 of the first holder 10, and an annular step 208 is also formed on the inner side in the radial direction of the second cylindrical portion 203 of the second holder 20. . Therefore, the outer ring 91 of the radial bearing 90 is prevented from coming off by the annular step portion 109, and the inner ring 92 of the radial bearing 90 is kept from coming off by the annular step portion 208. Therefore, the movable unit 7 (second holder 20) can be stably supported via the radial bearing 90 in the fixed unit 6 (first holder 10). Further, the radial bearing 90 can ensure an appropriate gap between the fixed unit 6 (first holder 10) and the movable unit 7 (second holder 20).

また、本形態では、ラジアル軸受９０が円環状であるため、第１ホルダ１０および第２ホルダ２０には大きな荷重が加わらない。それ故、第１ホルダ１０および第２ホルダ２０を耐荷重性に優れた高価な材料で構成する必要がない。   In this embodiment, since the radial bearing 90 is annular, a large load is not applied to the first holder 10 and the second holder 20. Therefore, it is not necessary to configure the first holder 10 and the second holder 20 with an expensive material having excellent load resistance.

［他の実施の形態］
上記実施の形態では、第１貫通穴１０４を利用してラジアル軸受９０を配置したが、第１貫通穴１０４および第２貫通穴２０４の双方を利用してラジアル軸受９０を配置してもよい。 [Other embodiments]
In the above embodiment, the radial bearing 90 is arranged using the first through hole 104, but the radial bearing 90 may be arranged using both the first through hole 104 and the second through hole 204.

上記実施の形態では、第１コア１５を４分割し、第２コア２５を３分割したが、これ以外の数に分割してもよい。いずれの場合も、第１コア１５のコア片１５０の隙間と、第２コア２５のコア片２５０の隙間が複数個所で重なることがないような数に分割すればよい。   In the above embodiment, the first core 15 is divided into four and the second core 25 is divided into three. However, the first core 15 may be divided into other numbers. In any case, the gap between the core pieces 150 of the first core 15 and the gap between the core pieces 250 of the second core 25 may be divided into a number that does not overlap at a plurality of locations.

１・・非接触電力伝送装置
６・・固定ユニット
７・・可動ユニット
１０・・第１ホルダ
１２・・第１基板
１３・・第１コイル
１５・・第１コア
２０・・第２ホルダ
２２・・第２基板
２３・・第２コイル
２５・・第２コア
９０・・ラジアル軸受
１０３・・第１円筒部
１０４・・第１貫通穴
１０９・・環状段部
１３０・・第１コイルの端部
１４１・・第１光学素子
１４１ａ、２４１ａ・・発光素子
１４１ｂ、２４１ｂ・・受光素子
１５０、２５０・・コア片
１５１、２５１・・底板部
１５２、２５２・・内板部
１５３、２５３・・外板部
２０３・・第２円筒部
２０４・・第２貫通穴
２０８・・環状段部
２０９・・筒状胴部
２３０・・第２コイルの端部
２４１・・第２光学素子 Non-contact power transmission device 6 Fixed unit 7 Movable unit 10 First holder 12 First substrate 13 First coil 15 First core 20 Second holder 22 The second substrate 23 The second coil 90 The radial bearing 103 The first cylindrical portion 104 The first through hole 109 The annular step 130 The end of the first coil 141 ··· First optical elements 141a and 241a ··· Light emitting elements 141b and 241b · · Light receiving elements 150 and 250 · · Core pieces 151 and 251 · · Bottom plate portions 152 and 252 · · Inner plate portions 153, 253 ·· Outer plates Part 203 .. second cylindrical part 204 .. second through hole 208 .. annular step part 209 .. cylindrical body part 230 .. second coil end 241 .. second optical element

Claims (5)

第１貫通穴が回転中心軸線上に形成された第１ホルダと、
前記第１ホルダに保持され、前記第１貫通穴を中心に周回している第１コイルと、
前記第１ホルダに対して前記回転中心軸線方向で対向し、第２貫通穴が前記回転中心軸線上に形成された第２ホルダと、
前記第１コイルに対向するように前記第２ホルダに保持され、前記第２貫通穴を中心に周回している第２コイルと、
前記第１貫通穴および前記第２貫通穴のうちの少なくとも一方で前記第１貫通穴および前記第２貫通穴に対して同心状に配置され、前記第１ホルダと前記第２ホルダとを相対回転可能に連結するボールベアリングからなる１つのラジアル軸受と、
を有し、
前記ラジアル軸受は、前記ラジアル軸受の内輪に前記回転中心軸線方向の前記第１ホルダが位置する側から被さった状態で前記第２ホルダに固定された第１カラー、および前記ラジアル軸受の外輪に前記回転中心軸線方向の前記第２ホルダが位置する側から被さった状態で前記第１ホルダに固定された第２カラーを介して前記第１ホルダと前記第２ホルダとを相対回転可能に連結し、
前記第１ホルダには、前記外輪に前記回転中心軸線方向の前記第１ホルダが位置する側から当接して前記外輪が前記回転中心軸線方向の前記第１ホルダが位置する側に抜けることを防止する環状段部が設けられ、前記第２ホルダには、前記内輪に前記回転中心軸線方向の前記第２ホルダが位置する側から当接して前記内輪が前記回転中心軸線方向の前記第２ホルダが位置する側に抜けることを防止する環状段部が設けられていることを特徴とする非接触電力伝送装置。 A first holder in which a first through hole is formed on a rotation center axis ;
A first coil held by the first holder and circling around the first through hole;
A second holder which is opposed to the first holder in the direction of the rotation center axis and in which a second through hole is formed on the rotation center axis ;
A second coil held by the second holder so as to face the first coil and circling around the second through hole;
At least one of the first through hole and the second through hole is disposed concentrically with respect to the first through hole and the second through hole, and the first holder and the second holder are rotated relative to each other. One radial bearing consisting of ball bearings that can be connected ,
Have
The radial bearing includes a first collar fixed to the second holder in a state of covering the inner ring of the radial bearing from the side where the first holder in the rotation center axis direction is located, and the outer ring of the radial bearing to the outer ring. The first holder and the second holder are connected so as to be rotatable relative to each other via a second collar fixed to the first holder in a state of covering from the side where the second holder in the rotation center axis direction is located,
The first holder is in contact with the outer ring from the side where the first holder in the direction of the rotation center axis is located, and the outer ring is prevented from coming out to the side where the first holder is located in the direction of the rotation center axis. An annular step portion is provided, and the second holder is in contact with the inner ring from the side where the second holder in the rotation center axis direction is located, and the second holder in the rotation center axis direction is in contact with the inner ring. A non-contact power transmission device, characterized in that an annular stepped portion is provided to prevent it from coming off to the position side . 前記第１コイルに対して前記第２コイル側とは反対側で前記第１ホルダに保持された第１コアと、
前記第２コイルに対して前記第１コイル側とは反対側で前記第２ホルダに保持された第２コアと、
を有し、
前記第１コアは、前記第１コイルに対して前記第２コイル側とは反対側で重なる底板部と、該底板部の内縁から突出して前記第１コイルの内周部分に径方向内側で重なる内板部と、前記底板部の外縁から突出して前記第１コイルの外周部分に径方向外側で重なる外板
部と、を有し、
前記第２コアは、前記第２コイルに対して前記第１コイル側とは反対側で重なる底板部と、該底板部の内縁から突出して前記第２コイルの内周部分に径方向内側で重なる内板部と、前記底板部の外縁から突出して前記第２コイルの外周部分に径方向外側で重なる外板部と、を有することを特徴とする請求項１に記載の非接触電力伝送装置。 A first core held by the first holder on the side opposite to the second coil with respect to the first coil;
A second core held by the second holder on the side opposite to the first coil with respect to the second coil;
Have
The first core protrudes from the inner edge of the bottom plate portion and overlaps the inner peripheral portion of the first coil on the inner side in the radial direction, and overlaps with the first coil on the side opposite to the second coil side. An outer plate that protrudes from an outer edge of the inner plate portion and the bottom plate portion and overlaps the outer peripheral portion of the first coil on the outer side in the radial direction
And
The second core protrudes from the inner edge of the bottom plate and overlaps the inner peripheral portion of the second coil on the inner side in the radial direction, and overlaps with the second coil on the side opposite to the first coil with respect to the second coil. 2. The non-contact power transmission device according to claim 1 , further comprising: an inner plate portion; and an outer plate portion that protrudes from an outer edge of the bottom plate portion and overlaps an outer peripheral portion of the second coil on a radially outer side . 前記第１コアおよび前記第２コアでは、前記内板部の厚さが前記外板部の厚さより厚いことを特徴とする請求項２に記載の非接触電力伝送装置。 The contactless power transmission device according to claim 2 , wherein the first core and the second core have a thickness of the inner plate portion larger than a thickness of the outer plate portion . 前記第１コアおよび前記第２コアは、周方向に複数のコア片が配置された分割コアであり、
前記第１コアを構成する前記コア片の間を通って前記第１コイルの端部が前記第１コアに対して前記第１コイルとは反対側に引き出されており、
前記第２コアを構成する前記コア片の間を通って前記第２コイルの端部が前記第２コアに対して前記第２コイルとは反対側に引き出されていることを特徴とする請求項２または３に記載の非接触電力伝送装置。 The first core and the second core are divided cores in which a plurality of core pieces are arranged in a circumferential direction,
The end of the first coil is drawn out to the opposite side of the first coil with respect to the first core through the core pieces constituting the first core,
Claims, characterized in that is drawn to the side opposite to the second coil end portion of the through between the core pieces second coil relative to the second core constituting the second core The contactless power transmission device according to 2 or 3 . 前記第１コアおよび前記第２コアは、熱硬化性樹脂によって磁性粉を固めてなることを特徴とする請求項２乃至４の何れか一項に記載の非接触電力伝送装置。 The non-contact power transmission device according to any one of claims 2 to 4, wherein the first core and the second core are formed by solidifying magnetic powder with a thermosetting resin .
JP2014099162A 2014-05-13 2014-05-13 Non-contact power transmission device Expired - Fee Related JP6347984B2 (en)

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