JP2019176644A - Non-contact power transmission component and non-contact power transmission device - Google Patents

Abstract

To provide a non-contact power transmission component with improved convenience and a non-contact power transmission device including the same.SOLUTION: A non-contact power transmission component 100 of the present invention includes: a cylindrical enclosure 101; a first magnetic member 102 fixed to the inner side of the enclosure 101; and a first conductive member that surrounds an axis extending through the first magnetic member 102 in a central axis direction 101C of the enclosure around the first magnetic member 102. The enclosure 101 is obtained by coupling a plurality of parts, and a coupling in at least one position among a plurality of coupled positions has a removable structure.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a non-contact power transmission component and a non-contact power transmission device.

  2. Description of the Related Art Conventionally, a structure using a contact slip ring (rotary connector) is known as means for transmitting power or signal to a rotating body. When this contact-type slip ring is used, maintenance work that takes into consideration the wear of the contact point with the rotating body is required. Therefore, in recent years, it has been possible to save time and effort without contact-type power or signal transmission. There is an increasing demand for the development of means.

  In Patent Document 1, there are two magnetic pole cores that are magnetically coupled to the rotor core via a slight magnetic gap, and a yoke core that is magnetically coupled to each other in the axial direction. There has been proposed a non-contact rotary transformer in which is wound. Further, Patent Document 2 proposes a transmission antenna and a reception antenna that are formed of coils having a shape in which a portion where current flows in one direction is bent and a portion where current flows in the opposite direction is similarly bent. The transmitting antenna and the receiving antenna here are assumed to be a non-contact type power transmission device in which a rotating body is disposed outside a closed loop formed by a coil.

JP 58-182807 A International Publication No. 2017/022054

  However, in the rotary transformer as proposed in Patent Document 1, for example, when the magnetic pole core has a shape that completely covers the periphery of the rotating body in order to reduce the magnetic resistance (FIG. 5), the magnetic pole core It is difficult to remove from the rotating body. Similarly, in the power transmission device proposed in Patent Document 2, for example, in order to increase the inductance, when the coil has a shape surrounding the axis of the rotating body (FIG. 2), the coil is rotated. It is difficult to remove from the body. Therefore, in these configurations, it is difficult to attach and remove the magnetic pole core and the coil with work such as repair and replacement, and the convenience as a means for transmitting power or signals to the rotating body is low.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a non-contact power transmission component with improved convenience and a non-contact power transmission device including the same.

  The present invention provides the following means in order to solve the above problems.

(1) A non-contact power transmission component according to an aspect of the present invention includes a cylindrical housing, a first magnetic member fixed to the inside of the housing, and the first magnetic member around the first magnetic member. A first conductive member surrounding a shaft penetrating the first magnetic member in a central axis direction of the housing, and the housing connects a plurality of portions, and at least one of the plurality of connecting portions The connection has a releasable structure.

  In the non-contact power transmission component of the present invention, the magnetic member is fixed in a cylindrical casing, and the casing is composed of a plurality of portions and has a structure that can be expanded or divided. Therefore, for example, even when the rotating body is too long in the axial direction, and it is difficult to attach / remove the magnetic member and the conductive member (coil) by moving in the axial direction of the rotating body, the housing is expanded or divided. By doing so, the magnetic member and the conductive member can be moved and moved easily in the radial direction. Also, for example, even when the rotating body is too thick in the radial direction and it is difficult to move in the radial direction of the rotating body to attach / remove the magnetic member and the conductive member, attach / remove similarly. be able to. Therefore, according to the present invention, it is easy to attach and detach the magnetic member and the conductive member in accordance with the work such as repair and replacement, and the convenience as power or signal transmission means to the rotating body is improved. It is possible to provide a contactless power transmission component and a contactless power transmission device including the same.

(A), (b) It is a perspective view of the component for non-contact electric power transmission which concerns on 1st embodiment of this invention. (A), (b) It is the perspective view and side view of a magnetic member and a conductive member which comprise the components for non-contact electric power transmission of FIG. (A) It is a perspective view of the magnetic member and electrically conductive member which concern on 2nd embodiment of this invention. (B) It is the perspective view which expand | deployed the magnetic member and conductive member of (a). It is sectional drawing of the magnetic member which concerns on 3rd embodiment of this invention. It is a perspective view of the magnetic member which concerns on 4th embodiment of this invention. It is sectional drawing of the non-contact electric power apparatus which concerns on 1st embodiment of this invention.

  Hereinafter, the present invention will be described in detail with appropriate reference to the drawings. In the drawings used in the following description, in order to make the characteristics of the present invention easier to understand, there are cases where the characteristic parts are enlarged for the sake of convenience, and the dimensional ratios and the like of each component are different from actual ones. is there. The materials, dimensions, and the like exemplified in the following description are merely examples, and the present invention is not limited to these, and can be implemented with appropriate modifications within the scope of the effects of the present invention.

<First embodiment>
[Non-contact power transmission components]
FIGS. 1A and 1B are perspective views showing the configuration of the non-contact power transmission component 100 according to the first embodiment of the present invention. FIG. 1A shows a state in which the casing 101 constituting the non-contact power transmission component 100 is closed and the power transmission is in operation. FIG. 1B shows a state in which the casing 101 constituting the non-contact power transmission component 100 is expanded and can be attached to or detached from the rotating body. FIGS. 2A and 2B are a perspective view and a side view of the first magnetic member 102 and the first conductive member 103 wound around the first magnetic member 102 disposed in the housing 101. FIG. The non-contact power transmission component 100 is a power transmission or power reception component that constitutes the non-contact power transmission device. In the present embodiment, a case where the contactless power transmission component 100 is a power transmission component will be described as an example.

  The contactless power transmission component 100 includes a substantially cylindrical casing 101 having both ends opened, a first magnetic member 102 fixed to the inside of the casing 101, and a first magnetic member 102 around the first magnetic member 102. A first conductive member 103 surrounding the shaft 102C penetrating the first magnetic member 102 in the direction of the central axis 101C.

  The shape of the housing 101 is preferably a cylindrical shape, but may be any shape that can hold the first magnetic member 102, and may be any of a rectangular tube, a polygonal tube, and the like, and has an opening on the side wall. It may be. Moreover, the thickness of the wall which comprises the housing | casing 101 does not need to be uniform, and the shape of an outer wall surface and the shape of an inner wall surface may mutually differ. That is, the shape of the outer wall surface does not have to change following the shape of the inner wall surface, and the shape of the inner wall surface does not need to change following the shape of the outer wall surface. Therefore, the shape of the housing 101 may be, for example, a cylindrical inner wall surface and a rectangular cylindrical outer wall surface, a rectangular cylindrical inner wall surface, and a cylindrical outer wall surface. The ends (upper and lower ends in FIG. 1) in the direction of the central axis 101C of the housing pass at least power receiving components that are paired with the non-contact power transmission component 100 (here, power transmission components). It is only necessary to have an opening having a size, and the entire surface may not be opened.

The housing 101 includes a plurality of parts and has a structure that can be expanded or divided. That is, the housing 101 is formed by connecting a plurality of parts that are not integral. At least one of the plurality of connection locations has a releasable structure. FIGS. 1A and 1B illustrate a case where the housing 101 is composed of two semi-cylindrical portions 101A and 101B. Two portions 101A, 101B to each other, are connected by one end _{S 1} of the circumferential direction E via the rotary shaft member 101D. In the other end S _2, 2 two parts 101A, although 101B to each other are connected directly, the coupling has a can be released as required structure. Housing 101 in this case, as a fulcrum at one end S _1, it is possible to open and close the other end S _2. As such a housing, for example, a clamp arm having a function of opening / closing control for the purpose of gripping an object can be used.

  The structure capable of releasing the connection is not particularly limited. For example, one of the parts to be disconnected has a convex part, the other has a concave part, and one convex part is the other concave part. Examples include a fitting structure. The parts that cannot be disconnected are always connected.

  As a material of the housing 101, for example, polypropylene, ABS resin, or the like can be used.

As shown in FIG. 2 (b), the first magnetic member 102, the center axis 101C direction of the casing, extends beyond the wound area (center portion) R ₁ in the first conductive member 103 It is preferable. That is, both end portions of the first magnetic member 102 in the central axis 101C direction, respectively, having an area R ₂ in which the first conductive member 103 is not wound. In the direction of the central axis 101C, the total length of the _two portions (region R ₂ ) extending outward from the region R ₁ is 10% or more of the entire length of the first magnetic member 102 and 1 mm or more. Is preferred. By setting the length of the extending portion within this range, when the power receiving parts to be paired are arranged, the power transmitting side first conductive member (power transmitting coil) and the power receiving side second conductive member (power receiving coil) The magnetic coupling constant is 0.2 or more, and the magnetic coupling necessary for power transmission can be ensured.

  The 1st magnetic member 102 should just be arrange | positioned inside at least 1 part among the several parts which comprise a housing | casing. From the viewpoint of forming a uniform magnetic path, it is preferably arranged symmetrically with respect to the central axis 101C of the casing 101, more preferably fixed to each of the plurality of portions, and if arranged over the entire circumference. Most preferred. From the same viewpoint, the first magnetic member 102 preferably has a shape with little gap (substantially integrated shape) when the casing 101 is closed, and more preferably a cylindrical shape. The first magnetic member 102 is preferably bent (curved) along the inner surface of the housing from the viewpoint of facilitating fixing to the housing 101. The first magnetic member 102 may not be an integral member, and may be composed of a plurality of members that are separate from each other. The number of members fixed to each part of the housing 101 is not limited, and may be one or two or more. One member may be fixed over a plurality of portions of the housing 102.

  As a material of the first magnetic member 102, for example, ferrite, a metal-based soft magnetic material, or a material in which these and a resin are combined can be used.

  As the first conductive member 103, it is preferable to use a coil in which a conductive wire is wound in a spiral shape. In this case, the number of turns per unit length in the direction of the central axis 101C of the housing is 3 to 500 times. Preferably there is. As a material of the first conductive member 103, for example, an annealed copper wire, an aluminum wire, or the like can be used.

  As described above, in the non-contact power transmission component 100 according to the present embodiment, the first magnetic member 102 is fixed in the cylindrical casing 101, and the casing 101 is composed of a plurality of parts and is expanded or divided. It has a possible structure. Therefore, for example, even when the rotating body is too long in the axial direction and it is difficult to move in the axial direction of the rotating body and attach / remove the first magnetic member 102 and the first conductive member (coil) 103, By expanding or dividing the housing 101, the first magnetic member 102 and the first conductive member 103 can be moved in the radial direction, and can be easily attached and detached.

  Further, for example, even when the rotating body is too thick in the radial direction and it is difficult to move in the radial direction of the rotating body to attach / remove the first magnetic member 102 and the first conductive member 103, the same applies. Can be attached and removed.

  Therefore, according to the present embodiment, it is easy to attach / remove the first magnetic member 102 and the first conductive member 103 along with work such as repair and replacement, and power or signal transmission to the rotating body. It is possible to provide a non-contact power transmission component 100 with improved convenience as a means and a non-contact power transmission device including the same.

<Second embodiment>
FIG. 3A is a perspective view of portions (the first magnetic member 102 and the first conductive member 103) excluding the casing 101 in the non-contact power transmission component according to the second embodiment of the present invention. . FIG. 3B is a perspective view in which the first magnetic member 102 and the first conductive member 103 of FIG.

  In the non-contact power transmission component of the present embodiment, the first conductive member 103 includes a flexible substrate 103A and a conductive pattern (conductive film) 103B formed on one main surface 103a. A film such as a protective film may be formed on the conductive pattern 103B. The first conductive member 103 is disposed so that the other main surface 103b side of the flexible substrate 103A faces the first magnetic member 102. The flexible substrate 103A and the first magnetic member 102 may be in contact with each other or may be separated from each other. The conductive pattern 103B is formed in a spiral shape when the flexible substrate 103A is wound around the first magnetic member 102 (the state shown in FIG. 3A). About another structure, it is the same as that of the structure of 1st embodiment, About the same location as 1st embodiment, it has shown with the same code | symbol irrespective of the difference in shape. In this embodiment, the same effect as that of the first embodiment can be obtained.

As a material of the flexible substrate 103A in this case, for example, polyimide or the like can be used. The thickness of the flexible substrate 103A is preferably in the range of 5 μm to 500 μm.

  Moreover, as a material of the conductive pattern 103B in this case, for example, a copper foil or the like can be used. The conductive pattern 103b can be formed using a known method such as a sputtering method. The conductive pattern 103B preferably has a width in the range of 10 μm to 5 mm, and preferably has a thickness in the range of 17 μm to 300 μm.

<Third embodiment>
FIG. 4 is a cross-sectional view of a portion (first magnetic member 102 and first conductive member 103) excluding the casing 101 in the non-contact power transmission component according to the third embodiment of the present invention. Assuming that a pair of transmission parts (power receiving parts) 104 is disposed at a position surrounded by the first magnetic member 102, the transmission parts 104 are indicated by broken lines. The back side of the first magnetic member 102 and the first conductive member 103 is not shown.

  In the non-contact power transmission component of the present embodiment, the first magnetic member 102 has an uneven structure on the central axis 101C side. In FIG. 4, the first magnetic member 102 has a protrusion 102 a on the central axis 101 </ b> C side at the end in the direction of the central axis 101 </ b> C (the upper end and the lower end in FIG. 4). A cross section perpendicular to E is substantially U-shaped. The first conductive member 103 is wound around a portion without the protrusion 102a. About another structure, it is the same as that of the structure of 1st embodiment, About the same location as 1st embodiment, it has shown with the same code | symbol irrespective of the difference in shape. In this embodiment, the same effect as that of the first embodiment can be obtained.

  When the paired transmission parts 104 are arranged as shown in FIG. 4, in the above-described embodiment, the first magnetic member 102 is placed at least as much as the width of the first conductive member 103. It is necessary to separate from the magnetic member which comprises. However, in this embodiment, the distance between the protrusion 102a around which the first conductive member 103 is not wound and the magnetic member can be reduced, and better power transmission can be achieved than when the protrusion 102a is not provided. be able to.

<Fourth embodiment>
FIG. 5 is a perspective view of a portion (first magnetic member 102 and first conductive member 103) excluding the casing 101 in the non-contact power transmission component according to the fourth embodiment of the present invention. In the non-contact power transmission component of the present embodiment, the first magnetic member 102 is composed of three or more portions 102A. About another structure, it is the same as that of the structure of 1st embodiment, About the same location as 1st embodiment, it has shown with the same code | symbol irrespective of the difference in shape. Also in this embodiment, the same effect as the first embodiment can be obtained.

  The first conductive member 103 may be a spiral coil as in the first conductive member 103 of the first embodiment, or may be electrically conductive to a flexible substrate as in the first conductive member 103 of the second embodiment. A pattern may be formed. Further, as shown in FIG. 5, the first conductive member 103 is wound around each portion 102A so as to form a spiral and may be separated from each other, but can be operated with one power source. It is preferable that they are integral.

  FIG. 5 illustrates the case where the first magnetic member 102 is composed of a plurality of portions arranged in the circumferential direction E. However, the first magnetic member 102 is arranged in any direction as long as it is within the range accommodated in the housing. It may be composed of parts. Although each part which comprises the 1st magnetic member 102 may mutually be spaced apart, from the viewpoint of ensuring the volume of the magnetic member used for electric power transmission, the one where a separation distance is short is preferable.

[Non-contact power transmission equipment]
FIG. 6 is a cross-sectional view showing the configuration of the non-contact power transmission apparatus 200 according to this embodiment. The non-contact power transmission device 200 includes the above-described non-contact power transmission component 100, a rod-shaped second magnetic member 202 extending in one direction, and a second conductive member 203 wound around the second magnetic member 202. And. Here, illustration of the housing 101 is omitted, but it is preferable that one of the first magnetic member 102 and the second magnetic member 202 is longer than the other in the central axis direction 101C of the housing.

  The second magnetic member 202 is disposed so as to penetrate the region surrounded by the casing 101 in the direction of the central axis 101 </ b> C of the casing 101. The extending direction of the second magnetic member 202 is substantially parallel to the direction of the central axis 101C. As a material of the second magnetic member 202, for example, ferrite, a metal-based soft magnetic material, and a material in which these and a resin are combined can be used.

  Similar to the first conductive member 103 of the first embodiment, the second conductive member 203 may be a spiral coil, or, like the first conductive member 103 of the second embodiment, conductive to the flexible substrate. A pattern may be formed.

In the direction of the central axis 101 </ b> C of the housing, a region R ₁ (region sandwiched between broken lines) wound by the first conductive member 103 of the first magnetic member 102 is wound by the second conductive member 203 of the second magnetic member 202. than he region (region sandwiched by one-dot chain line) R _3, and extends outward. In such a configuration, the state in which the first conductive member 103 and the second conductive member 203 overlap in the direction of the central axis 101 </ b> C can be maintained, and the relative relationship between the first conductive member 103 and the second conductive member 203 can be maintained. It is possible to reduce the influence of the general positional deviation.

  The second magnetic member 202 preferably has a through hole 202A extending along the direction of the central axis 101C of the housing. In the case where the second magnetic member 202 has the through hole 202A, it is possible to accommodate the component inside, and to arrange the axis of the rotating body.

DESCRIPTION OF SYMBOLS 100 ... Non-contact power transmission part 101 ... Housing | casing 101A, 101B ... Part 101C which comprises housing | casing ... Center axis 101D of housing | casing ... Rotary shaft member 102 ... 1st Magnetic member 102a ... Projection 102C ... Shaft 103 penetrating first magnetic member ... First conductive member 103A ... Flexible substrate 103B ... Conductive pattern 103a, 103b ... Main surface of flexible substrate 104 ... Transmission component 200 ... Non-contact power transmission device 202 ... Second magnetic member 202A ... Through-hole 203 ... Second conductive member E ... Circumferential direction R of the casing _1. Area R ₂ wound with the first conductive member Area R ₃ not wound with the first conductive member Area S ₁ wound with the second conductive member Part constituting the casing the portion constituting one end S ₂ · · · housing of End-to-side

Claims (10)

A cylindrical housing;
A first magnetic member fixed to the inside of the housing;
A first conductive member surrounding a shaft passing through the first magnetic member in a central axis direction of the housing around the first magnetic member;
The non-contact power transmission component, wherein the housing is formed by connecting a plurality of portions, and has a structure in which at least one connection among the plurality of connection portions can be released.   The contactless power transmission component according to claim 1, wherein the first magnetic member is fixed to each of the plurality of portions.   The said 1st magnetic member is extended outside the area | region wound with the said 1st electrically-conductive member in the central-axis direction of the said housing | casing. Non-contact power transmission parts.   In the central axis direction of the housing, the length of the portion of the first magnetic member that extends from the region wound by the first conductive member is 10% or more of the total length of the first magnetic member. The contactless power transmission component according to claim 1, wherein the component is a contactless power transmission component.   The non-contact power transmission component according to claim 1, wherein the first conductive member is a coil in which a conductive wire is wound in a spiral shape. The first conductive member is composed of a flexible substrate wound around the first magnetic member and a linear conductive pattern formed on the main surface thereof,
5. The conductive pattern according to claim 1, wherein the conductive pattern is formed in a spiral shape in a state in which the flexible substrate is wound around the first magnetic member. 6. Non-contact power transmission parts. The contactless power transmission component according to any one of claims 1 to 6,
A non-contact power transmission device comprising: a rod-shaped second magnetic member penetrating the cylindrical casing in the central axis direction; and a second conductive member wound around the rod-shaped second magnetic member.   In the central axis direction of the housing, a region of the first magnetic member wound around the first conductive member extends outward from a region of the second magnetic member wound around the second conductive member. The contactless power transmission device according to claim 7, wherein   9. The contactless power transmission device according to claim 7, wherein one of the first magnetic member and the second magnetic member is longer than the other in the central axis direction of the housing.   The contactless power transmission device according to any one of claims 7 to 9, wherein the second magnetic member has a through hole extending along a central axis direction of the casing.

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