JP2020113468A - Power line structure for transmission - Google Patents

Abstract

To provide a power line structure for transmission, suppressing generation of an eddy current caused by the skin of a coil winding wire and proximity effect in a coil layer part 13a, minimizing transmission loss by suppressing lowering of power transmission efficiency, and applied with an electromagnetic wave-shielding function.SOLUTION: One twisted part 13A in parts twisted due to positional deviation deformation of a coil layer part 13a is bent so as to form a prescribed angle θ. In the twisted part 13A of the coil layer part 13a, current flowing directions of an electric current I become opposite in a preceding strand 13b and a succeeding strand 13c. A magnetic flux front surface 13f is made by gathering magnetic fluxes generated in the preceding strand 13b, and a magnetic flux rear surface 13g is made by gathering magnetic fluxes generated in the succeeding strand 13c. With this, a prescribed angle φ is formed by the magnetic flux front surface 13f and the magnetic flux rear surface 13g generated due to that the current flowing directions of the electric current I are opposite.SELECTED DRAWING: Figure 2

Description

The present invention relates to an improvement in a power line structure for electric power transmission applied to an electric system, and more particularly to a power line structure for transmission which requires a high electric capacity and has an electromagnetic wave shielding function.

In the automobile industry, various electric wires are used as a wiring harness for connection in order to supply electric power to electric components. Examples of this type of application are connecting to sensors for ABS (anti-lock braking system), EPB (electric parking brake), AVS (adaptive variable suspension system), WSS (wheel skid system), etc. There is.

Future applications include connecting to sensors for EMB (electric motor brake). As another application example, it is used for connecting an electronic control unit (ECU) having a built-in computer and various in-vehicle sensors.

In vehicles such as EV cars and PHEV cars that use a storage battery as a power source, it is necessary to supply power to a drive motor such as an in-wheel motor with a high electric capacity in order to adjust the speed change of the rotation speed (see Patent Document 1). .. For this reason, it is necessary to configure the power line to the drive motor as a multi-core laminated electric wire, and to configure it as a dense packing that is close to a perfect circle shape and is hard to collapse and deform (see Patent Documents 2 to 5).

Incidentally, the stranded wire conductor of Patent Document 2 has an outer layer composed of a plurality of layers, and each layer of the outer layer has a plurality of strands arranged on the same circumferential circle. In the outer layer, the number of wires forming each layer is the same, and the diameter of the wires of each layer is also set to the same size. With this structure, the sliding phenomenon on the contact surface of the wire is unlikely to occur, the untwisting is unlikely to occur, and the opening of the twist is also unlikely to occur.

When the power line is used as the assembly line, it is necessary to suppress the generation of eddy current due to the skin and the proximity effect so that the power transmission efficiency does not decrease (see Patent Document 6).
Further, Patent Document 7 describes a shielded electric wire cable made of a braid or mesh, and Patent Document 8 discloses a shielded wire for electromagnetic wave shielding. In these Patent Documents 7 and 8, the electromagnetic wave noise is shielded by the braid, the mesh, and the shield layer to prevent the electric signal from interfering with the electrically conductive member. Further, Patent Document 9 describes a brake hose in which an electric wire braided portion composed of a plurality of fine wires is wound.

JP, 2005-131629, A JP, 2009-158331, A JP, 2017-183086, A JP, 2008-21603, A JP 2001-35260 A JP, 2013-207907, A Japanese Patent Laid-Open No. 05-120930 Japanese Unexamined Patent Application Publication No. 2015-153497 JP 2006-236861 A

However, in the recent automobile industry, since emphasis is placed on weight reduction of vehicles, weight reduction of electric wires is also demanded. It is insufficient from the viewpoint of weight saving while ensuring electric capacity.
For this reason, the wiring of electric wires is a power line structure that can suppress transmission loss after realizing a high-capacity power supply by configuring a multi-core laminated electric wire as dense packing while aiming to reduce the weight of the electric wire structure. Realization of is desired.

The present invention has been made in view of the above circumstances, and an object thereof is to shield electromagnetic wave noise and to enable high-capacity power supply, and to generate eddy currents due to the skin and proximity effect. It is an object of the present invention to provide a power line structure for transmission in which the transmission loss can be suppressed and the transmission loss can be minimized by suppressing the reduction of the power transmission efficiency.

The element wire is formed by continuously winding it in a spiral coil shape, and a coil winding having a hollow shaft inside as a longitudinal direction is provided. An elastic resin-coated coil layer is provided in close contact with the outer surface of the coil winding to integrally enclose the coil winding. The coated coil layer has an urging force against its own deformation as an elastic urging force.
The contact position is defined as a state in which the coil layer portions of a single pitch adjacent to each other of the coated coil layer are in contact with each other in the longitudinal direction against the elastic force.
The extended position when the coil layer portions with a single pitch are displaced and deformed in the radial direction orthogonal to the longitudinal direction, and the coil layer portions are extended and separated from each other in the radial direction due to the elastic force. I am trying. The coil layer portions are elastically displaceable between the contact position and the extended position.
The outer peripheral surface of the coated coil layer is formed by braiding a plurality of thin metal wires, or is formed by braiding a plurality of thin metal wires in a net shape, and is covered with a cylindrical electromagnetic shield layer having a single layer or a plurality of layers.
The attachment/detachment means brings the single-pitch coil layer portions adjacent to each other into contact with each other and holds them in the contact position, and releases the contact between the adjacent single-pitch coil layer portions to the extended position. Let
One of the portions twisted by the positional displacement deformation of the coil layer portion is bent to form a predetermined angle, and the other portion is bent to have a small-diameter loop wire.

In the above configuration, one of the portions twisted by the positional displacement deformation of the coil layer portion is bent so as to form a predetermined angle.
In the twisted portion of the coil layer portion, the "twisted front portion" and the "twisted rear portion" have opposite current flowing directions. The front surface of the magnetic flux is formed by gathering the magnetic flux generated in the “twist front portion”, and the rear surface of the magnetic flux is formed by gathering magnetic flux generated in the “twist rear portion”.
The front surface of the magnetic flux and the rear surface of the magnetic flux, which are generated due to the opposite directions of the current flow, are not on the same plane and form a predetermined angle.

As a result, unlike the case where the front surface of the magnetic flux and the rear surface of the magnetic flux are on the same surface, the generation of eddy currents due to the skin of the coil winding and the proximity effect in the coil layer portion is suppressed, and the decrease in power transmission efficiency is suppressed. Transmission loss can be minimized.
Further, the coil winding is composed of a multi-core laminated part in which twisted wires are laminated in a plurality of layers, each layer of the multi-core laminated part constitutes a twisted wire, and the diameter dimension of the twisted wire of each layer goes from the inner layer to the outer layer. It is set to gradually increase. Therefore, dense packing of each layer can be realized, and high electric capacity of the multi-core laminated portion can be ensured.

A cylindrical electromagnetic wave having a high flexibility and flexibility formed by braiding a plurality of thin metal wires or by braiding a plurality of thin metal wires on a portion of the outer peripheral surface of the coated coil layer excluding the attaching/detaching means. Covers the shield layer. The electromagnetic wave shield layer can shield electromagnetic wave noise (for example, RFI, EMI, etc.) into the multi-core laminated portion and prevent interference of electric signals with respect to each twisted wire.

A protrusion is formed on one of the coil layer portions, and a recess is formed on the other. The coil layer portions are held at the abutting position by the detachable engagement between the protrusion and the recess via the detaching means. When the protrusion is separated from the recess, the coil layer portions are stretched in the radial direction by their elastic accumulating force and deformed and arranged in the extended position.

With this configuration, at the contact position, a compact coil layer structure is formed in which the coil layer portions are overlapped with each other in the contact state in the longitudinal direction.
When the protrusion is detached from the recess, the coil layer portions can be stretched in the radial direction by their own elastic force to be deformed and arranged in the extended position. Therefore, even a compact coil layer structure can be used for electrical connection between terminals existing in a long section by deforming and disposing the coil layer portions in the extended position.

A net-like jacket made up of a plurality of long thin metal wires knitted in a tubular shape, which is flexible and highly flexible, and can be expanded and contracted in the radial direction. Excluding the attachment/detachment means on the outer peripheral surface of the coated coil layer. A reticulated jacket is put on the part in a tightly bound state by covering it with a reduced diameter deformed state, covering it and tightening it.
Thereby, the integrity of the covered coil layer including the multi-core laminated portion having each twisted wire can be strengthened.

It is a longitudinal cross-sectional view showing a structure in which a power line structure for transmission used in an electric system is applied to an in-wheel motor (Example 1). (A) is a front view showing a covered coil layer in a contact position, (b), (c) is a front view showing a covered coil layer in an extended position (Example 1). (A)-(c) is explanatory drawing which shows the aspect which a covered coil layer displaces from an extension position to a contact position (Example 1). FIG. 1A is a perspective view showing a multi-core laminated portion of a coil winding partially broken, and FIG. 1B is a cross-sectional view showing a multi-core laminated wire of the coil winding (Example 1). It is a perspective view which fractures|ruptures and shows a multi-core laminated part of a coil winding partly (Example 2). It is a cross-sectional view showing a multi-core laminated portion of the coil winding (Example 3). It is a cross-sectional view showing a multi-core laminated portion of the coil winding (Example 4). It is a perspective view for showing a covering coil layer with which an electromagnetic wave shield layer was attached (Example 5). It is a perspective view for showing a covering coil layer with which a coat layer and an electromagnetic wave shield layer were attached (Example 6). It is a perspective view for showing a covering coil layer with which a reticulated jacket was attached (Example 7).

In the power line structure for transmission according to the present invention, one of the twisted portions due to the positional displacement deformation of the coil layer portion is bent so as to form a predetermined angle. In the coil layer part, the front and back surfaces of the magnetic flux generated by the opposite directions of the current flow are not on the same plane and form a predetermined angle, and the skin of the coil winding and the proximity effect in the coil layer part. It suppresses the generation of eddy currents caused by the above and minimizes the transmission loss, and at the same time, the electromagnetic wave shield layer provides a shield function.

First Embodiment A first embodiment of the present invention will be described with reference to FIGS.
In the power line structure for transmission according to the present invention, for example, from a sensor (not shown) for driving electric components such as ABS (anti-lock braking system) and EPB (electric parking brake) mounted on a vehicle. It is useful for signal transmission to an electric control unit (ECU) as a control computer. Above all, it is suitable as a power line to an in-wheel motor of an electric vehicle such as an EV vehicle and a PHEV vehicle.
As the power source, for example, a battery assembly (single-row stacked body) in which a plurality of thin rectangular batteries are arranged in parallel along the left-right direction and stacked as a single secondary battery is used as a storage battery 8 described later.

The power line structure 1A for transmission is applied to a direct current (DC) or alternating current (AC) in-wheel motor 3 of a wheel 2 of a tire 1 in an electric vehicle, as shown in FIG. 1, for example. A suspension mechanism 3A is arranged inside the wheel 2, and a compression coil spring 5 is arranged so as to surround a shock absorber 4 composed of a damper.

Power supply lines Lu, Lv, Lw, and Ls are connected as power lines 6 to the input terminals T1, T2, T3, and T4 of the in-wheel motor 3, respectively. The power line 6 connects the output terminals u1, u2, u3, u4 of the inverter 7 to the input terminals T1, T2, T3, T4 in order.

The storage battery 8 as a battery is connected to the inverter 7 via the system main relay 9 and the power control unit 10. The electric control unit 11 is connected to the system main relay 9 (SMR) and the power control unit 10 (PCU), respectively.

As shown in FIG. 2A, the power line 6 as the power supply lines Lu, Lv, Lw, and Ls is formed by continuously winding an element wire in a spiral coil shape, and the hollow shaft 12a inside is the longitudinal direction L. A coil winding 12 is provided. A coating layer 12A is provided in close contact with the outer surface of the coil winding 12 to form an elastic resin coating coil layer 13 that integrally encloses the coil winding 12.

The element wire of the coil winding 12 is a metal wire having the same diameter and a uniform cross section, such as copper or a copper alloy, and the surface of the metal wire may be plated with tin, nickel, silver, aluminum or various alloys. .. Instead of this metal wire, for example, a conductive synthetic resin wire such as polyacetylene or polythiophene may be used.

The resin material of the coating layer 12A in the coating coil layer 13 is selected as one selected from the group of vinyl-based polymers consisting of polyethylene, polystyrene, polypropylene and polyvinyl chloride, which are highly elastic, and the group of condensation-based polymers consisting of polyester and polyamide. There is.

A contact position H1 is defined as a state in which the coil layer portions 13a of a single pitch adjacent to each other of the coated coil layer 13 are in contact with or in close contact with each other along the longitudinal direction L against the elastic force of the elastic layer (FIG. 2). (See (a)).
Here, since the coating coil layer 13 integrally includes the coating layer 12A, the coating coil layer 13 retains the above-mentioned elastic energy storage force as a biasing force against its own deformation.

Adjacent single pitch coil layer portions 13a of the coated coil layer 13 are displaced and deformed in the first radial direction R orthogonal to the longitudinal direction L due to the elastic force of the coil layer portions 13a. A state in which they are extended along the radial direction R and separated from each other is defined as an extension position H2 (see FIGS. 2B and 2C). The coil layer portions 13a of the coated coil layer 13 are configured to be elastically displaceable between the contact position H1 and the extension position H2.

That is, in the free state, the coated coil layer 13 is shaped into a predetermined shape at the extended position H2 as shown in FIG. 3A, and the coated coil layer 13 is moved from the extended position H2 to the contact position H1. When elastically displacing, the elastic coil is pushed back against the elastic force of the coated coil layer 13 (see FIGS. 3B and 3C).

Because, in the process of elastically displacing from the extension position H2 to the contact position H1, the coated coil layer 13 is given an elastic force, and therefore the elastic coil force causes the coated coil layer 13 to extend from the contact position H1 to the extended position. It will be extended to H2.

In order to displace the coated coil layer 13 from the contact position H1 to the extended position H2, the coated coil layer 13 is pulled as shown by arrows E1 and E2 in FIG. 1A, or the arrow M is shown in FIG. So that it bends. As a result, the protrusion 13x, which will be described later, slips out of the recess 13y and is released, so that the covered coil layer 13 becomes free and is stretched to the extended position H2 by the elastic force.

A protrusion 13x is formed on one of the coil layer portions 13a, and a recess 13y is formed on the other. The projecting portion 13x and the recessed portion 13y constitute an attaching/detaching means, and the coil layer portions 13a are brought into contact with each other by the detachable engagement of the projecting portion 13x and the recessed portion 13y to hold the coil layer portions 13a at the contact position H1. When the protrusion 13x separates from the recess 13y, the coil layer portions 13a are released from contact with each other, and are stretched in the first radial direction R from the contact position H1 by their own elastic force to be deformed and arranged at the extended position H2.

That is, the attachment/detachment means abuts the coil layer portions 13a having a single pitch adjacent to each other and holds the coil layer portions 13a at a contact position H1, and releases the contact between the coil layer portions 13a having a single pitch adjacent to each other. To the extended position H2.

At the extended position H2, a twisted portion is generated both above and below the drawing due to the positional displacement deformation of the coil layer portion 13a. One of the twisted portions 13A is bent so that the preceding line element 13b and the following line element 13c form a predetermined angle θ (for example, within an angle range of 45° to 120°) ( See FIG. 2B). The other part 13B of the twisted portion is bent to have a small-diameter loop wire (13B) by the front short wire element 13d and the rear short wire element 13e.

As shown in FIGS. 4A and 4B, the coil winding 12 is composed of a multi-core laminated portion 15 in which twisted wires are laminated in a plurality of layers. The outer layer 15a, the middle layer 15b, and the inner layer 15c of the multi-core laminated portion 15 are arranged concentrically, and the outer layer 15a, the middle layer 15b, and the inner layer 15c have a radial dimension from the inner layer along the second radial direction Rs of the multi-core laminated portion 15. It is set to gradually increase as it goes to the outer layer.
This gradual increase rate can be set arbitrarily, and may be set, for example, as an arithmetic series or geometric series.

As an example of the multi-core laminated portion 15, the outer layer 15a is provided with seven inner twisted wires 16 formed by bundling a number of thin wires having a diameter dimension (φ) of 0.08 mm.
The middle layer 15b is provided with nine middle twisted wires 17 as a twisted wire, which is a bundle of many thin wires having a diameter dimension (φ) of 0.05 mm. The inner layer 15c is provided with twelve outer twisted wires 18 which are bundles of many thin wires having a diameter (φ) of 0.03 mm.

In this case, the radial directions of the outer twisted wire 16, the middle twisted wire 17, and the inner twisted wire 18 are all matched so as to be linearly aligned along the second radial direction Rs of the multi-core laminated portion 15. ..
That is, the twisted wires (outer twisted wire 16, middle twisted wire 17, and inner twisted wire 18) of each layer (outer layer 15a, middle layer 15b, inner layer 15c) are circumscribed along the circumferential direction Cs of the multi-core laminated portion 15, In addition, they are arranged in a circumscribed state along the second radial direction Rs.

In addition, in the multi-core laminated portion 15, the number of layers is not limited to the three concentric layers of the outer layer 15a, the middle layer 15b, and the inner layer 15c, and the number of layers may be increased or decreased according to the usage situation. Further, the number of each of the outer twisted wire 16, the middle twisted wire 17 and the inner twisted wire 18 in each of the outer layer 15a, the middle layer 15b and the inner layer 15c may be increased or decreased as desired.

Inner twisted wires 16 are arranged on the same circle with the same diameter dimension, middle twisted wires 17 are arranged on the same circle with the same diameter dimension, and outer twisted wires 18 are also arranged on the same circle with the same diameter dimension. The outer layer 15a, the middle layer 15b, and the inner layer 15c are concentric with each other.
The central portion of the multi-core laminated portion 15 forms a hollow space Sp that extends along the axial direction Ax of the multi-core laminated portion 15 to ensure high bending performance of the multi-core laminated portion 15.

The cross-sectional area of the multi-core laminated portion 15 is in the range of 15 to 25 square mm (preferably 20 square mm), and the compressibility of the multi-core laminated portion 15 is in the range of 60 to 80% (preferably 70%). Is set to. This is to ensure that the multicore laminated portion 15 has a high electric capacity.
If the multi-core laminated portion 15 is set to have the same area as that described above and is composed of thin wires having a diameter dimension of 0.05 mm to 0.08 mm, it is estimated that about 50,000 thin wires will be needed, which is a factor that hinders realization. Has become.

[Operation and effect of Example 1]
In the first embodiment, one of the twisted portions 13c twisted by the positional displacement deformation of the coil layer portion 13a is bent so as to form a predetermined angle θ (see FIG. 2B).
In the twisted portion 13A of the coil layer portion 13a, the "leading wire 13b (twisted front portion)" and the "trailing wire 13c (twisted rear portion)" have opposite current flowing directions. The magnetic flux front surface 13f is formed by the magnetic flux generated by the "leading wire 13b", and the magnetic flux rear surface 13g is formed by the magnetic flux generated by the "trailing wire 13c".

In this case, the magnetic flux front surface 13f and the magnetic flux rear surface 13g, which are generated due to the opposite directions of the current I, do not lie on the same plane and form a predetermined angle φ.
As a result, unlike the case where the magnetic flux front surface 13f and the magnetic flux rear surface 13g are on the same plane, the generation of eddy current due to the skin of the coil winding and the proximity effect in the coil layer portion 13a is suppressed, and the power transmission efficiency is improved. It is possible to suppress the decrease and minimize the transmission loss.

The coil winding 12 is composed of a multi-core laminated portion 15 in which a twisted wire (outer twisted wire 16, middle twisted wire 17, inner twisted wire 18) is laminated in a plurality of layers. 15b and 15c constitute a stranded wire, and the diameter of the stranded wire of each layer is set to gradually increase from the inner layer to the outer layer. Therefore, dense packing of each layer is realized, and high electric capacity of the multi-core laminated portion 15 can be ensured.

Further, at the contact position H1, the coil layer portions 13a form a compact coil layer structure in which the coil layer portions 13a are in contact with each other in the longitudinal direction L or overlap each other in a close contact state. When the protrusion 13x separates from the recess 13y, the coil layer portions 13a can be stretched in the first radial direction R by their own elastic force and can be deformed and arranged in the extended position H2.
Therefore, even a compact coil layer structure can be used for electrical connection between terminals in a long distance section by deforming and disposing the coil layer portions 13a to the extended position H2.

FIG. 5 shows a second embodiment of the present invention. The second embodiment differs from the first embodiment in that the communication line 21 enclosed in the rubber tube 20 is arranged in the space Sp of the multi-core laminated portion 15 along the axial direction Ax. As a result, a communication function is added and the multi-core laminated portion 15 can be used for multiple purposes or functions.

FIG. 6 shows a third embodiment of the present invention. The third embodiment is different from the first embodiment in that the number of outer twisted wires 16 in the outer layer 15a is the same as the number of middle twisted wires 17 in the middle layer 15b and the number of inner twisted wires 18 in the inner layer 15c.
The middle twisted wire 17 of the middle layer 15b is arranged so as to be circumscribed with the outer twisted wire 16 of the outer layer 15a and the inner twisted wire 18 of the inner layer 15c along the circumferential direction Cs.

That is, the twisted wires (outer twisted wire 16, middle twisted wire 17, inner twisted wire 18) of each layer (outer layer 15a, middle layer 15b, inner layer 15c) are arranged in a circumscribed state along the circumferential direction Cs, and the twisted wire of each layer is The number of arrangement is the same number with no difference in the number.
Therefore, not all of the radial directions of the middle twisted wire 17, the outer twisted wire 16, and the inner twisted wire 18 are necessarily aligned with each other along the second radial direction Rs of the multi-core laminated portion 15.

In Example 3, the filling rate of the outer layer 15a, the middle layer 15b, and the inner layer 15c with respect to the multi-core laminated portion 15 is remarkably improved, and excellent electric capacity can be realized. At this time, the communication line 21 enclosed in the tube 20 is arranged in the space Sp of the multi-core laminated unit 15 as in the second embodiment, but the communication line 21 is omitted and the space Sp is used as a space. You can stay open.

The invention of Example 3 shown in FIG. 6 corresponds to the invention described in Japanese Patent Application Laid-Open No. 2009-158331 (Patent No. 4673361) published as [Patent Document 2] in the [Background Art] section.
Since the patentee pertaining to [Patent Document 2] is Mishima Electric Cable Co., Ltd., in implementing the present invention, the patentee has agreed to make a separate agreement regarding the license from Mizu Electric Cable Co., Ltd. ..

FIG. 7 shows a fourth embodiment of the present invention. The difference of the fourth embodiment from the first embodiment is that the conductive wire is arranged in the cavity formed between the outer twisted wire 16, the middle twisted wire 17, and the inner twisted wire 18.
That is, the first conductive wire K1 is arranged in the circumscribed state between the inner stranded wire 18 and the middle stranded wire 17, and the second conductive wire K1 is arranged between the inner stranded wire 17 and the outer stranded wire 16. K2 is arranged in a circumscribed state, and the third conductive wire K3 is arranged in a circumscribed state between the coating layer 12A and the outer stranded wire 16.

In this case, the communication wire 21 enclosed in the rubber tube 20 is arranged in the hollow portion Sp of the multi-core laminated portion 15 as in the second embodiment.
In Example 4, in addition to the outer stranded wire 16, the middle stranded wire 17, and the inner stranded wire 18, it is possible to densely and densely fill the first conductive wire to the third conductive wire (K1 to K3).

FIG. 8 shows a fifth embodiment of the present invention. The fifth embodiment differs from the first embodiment in that the electromagnetic wave shield layer 50 is concentrically mounted on the outer peripheral surface of the coated coil layer 13.

The electromagnetic wave shield layer 50 is made of a flexible and flexible material, and is composed of a plurality of thin metal wires 50a, 50b having a diameter of about 0.5 to 1.5 mm in a tubular shape as a braid, or a metal. The thin wires 50a and 50b are braided in a mesh shape to form a tubular shape.
The electromagnetic wave shield layer 50 may have a tubular shape when it has a particularly small diameter and a long length, as long as it has a hollow structure capable of covering the coated coil layer 13. Further, the electromagnetic wave shield layer 50 is not limited to a single layer, and may have a multilayer structure in which a plurality of layers such as two layers or three layers are laminated. This multilayer structure can be applied to Examples 6 and 7 described later.

The electromagnetic wave shield layer 50 is mounted so as to cover the outer peripheral surface of the covered coil layer 13 except for the attaching/detaching means (protrusions 13x and recesses 13y). For the thin metal wires 50a and 50b forming the electromagnetic wave shield layer 50, for example, copper, copper alloy, aluminum, aluminum alloy or the like can be used as a conductive material.
When attaching the electromagnetic wave shield layer 50 to the coated coil layer 13, the coated coil layer 13 may be attached in a straight line state before being processed into a coil shape.

In the fifth embodiment, the electromagnetic wave shield layer 50 can shield the electromagnetic wave noise (for example, RFI, EMI, etc.) into the multi-core laminated portion 15 and prevent the electric signals from interfering with the twisted wires 17 to 19.
The electromagnetic wave shield layer 50 is provided so as to cover not only the outer peripheral surface of the coated coil layer 13 but also the outer peripheral surface of the multi-core laminated portion 15, and the electromagnetic wave shield layer 50 may be provided between the coated coil layer 13 and the multi-core laminated portion 15. You may arrange as you like.

FIG. 9 shows a sixth embodiment of the present invention. The sixth embodiment differs from the fifth embodiment in that an insulating outer coat layer 51 is attached as a coating layer on the outer peripheral surface of the electromagnetic wave shield layer 50 except the attaching/detaching means (protrusions 13x and recesses 13y). ..
The jacket layer 51 may be formed of polyethylene terephthalate (PET) or polypropylene resin using a conical cylindrical molding die, for example. When the outer cover layer 51 is attached to the electromagnetic wave shield layer 50, the outer cover layer 51 may be attached by extruding a synthetic resin in a linear state before bending the coated coil layer 13 into a coil shape.

The outer cover layer 51 may be attached by spirally winding it around the outer peripheral surface of the electromagnetic wave shield layer 50 except for the attaching/detaching means (protrusions 13x and recesses 13y) using a long strip tape packaging material. ..
Further, by forming the outer cover layer 51 with a conductive polymer such as polyaniline resin, the outer cover layer 51 can cooperate with the electromagnetic wave shield layer 50 to synergistically improve the shielding function.

FIG. 10 shows a seventh embodiment of the present invention. The seventh embodiment is different from the fifth embodiment in that the electromagnetic wave shield layer 50 is replaced with a tubular mesh jacket 52 as a restraint covering means. The reticulated jacket 51 is made of a flexible and highly flexible material, and is formed by, for example, braiding a plurality of long thin metal wires 52a and 52b into a tubular shape.

For example, by using a dedicated tool or the like, both ends of the mesh jacket 52 are set so as to be pulled along the axial direction Y so as to be opposite to each other, and the distance (distance) between the adjacent thin metal wires 52a and 52b is set. Force reduction.

As a result, the mesh jacket 52 is set to be expandable and contractible along the direction of the radial dimension Df (radial direction). When the net-like jacket 52 is reduced in diameter and deformed, a twisting operation may be applied simultaneously with the pulling operation on the net-like jacket 52. Instead of the pulling operation, only the twisting operation may be performed.
The net-like jacket 52 concentrically covering the coated coil layer 13 is contracted to the coated coil layer 13 in a tightly bounded state by changing the diameter of the meshed jacket 52 to a detachable means (projection portion) on the outer peripheral surface of the coated coil layer 13. 13x and the recessed portion 13y) are attached to all parts.

Thereby, the adhesion between the twisted wires 17 to 19 in the multi-core laminated portion 15 is improved, and the integrity of the covered coil layer 13 including the multi-core laminated portion 15 having the twisted wires 17 to 19 is strengthened. can do. The net-like jacket 52 may be attached to the coated coil layer 13 in a linear state before the coating coil layer 13 is bent into a coil shape. This case corresponds to the mode shown in FIGS. 8 to 10, and the coated coil layer 13 is shown in a straight line state.

When the overall length of the coated coil layer 13 becomes large, the mesh jacket 52 is divided into a plurality of sections in the longitudinal direction to form a plurality of mesh jacket portions, and the plurality of mesh jacket portions are individually covered on the coated coil layer 13. You may attach it.
The tightly bound state in which the coated coil layer 13 is tightened means a tight state in which the metal thin wires 52a and 52b of the mesh jacket 52 are at least taut and not loosened.

The net-like jacket 52 is covered on each outer peripheral surface of the electromagnetic wave shield layer 50 of Example 5 and the outer jacket layer 51 of the sixth embodiment, and in this state, the net-like jacket 52 is contracted and deformed to be tightly bound to the outer jacket layer 51. It may be tightened and attached.
When the net-like jacket 52 is covered with the electromagnetic wave shield layer 50, the adhesion between the electromagnetic wave shield layer 50 and the multi-core laminated portion 15 adjacent to each other is improved, and the electromagnetic wave shield layer 50 and the multi-core laminated portion 15 are covered with coil layers. The integrity of 13 can be strengthened.

Further, when the mesh jacket 52 is covered on each outer peripheral surface of the outer cover layer 51, the adhesion between the outer cover layer 51, the electromagnetic wave shield layer 50, and the multi-core laminated portion 15 is improved. As a result, the integrity of the jacket layer 51, the electromagnetic wave shield layer 50, and the coated coil layer 13 of the multi-core laminated portion 15 can be strengthened.

At this time, for the thin metal wires 52a and 52b, stainless steel (SUS) having high strength (high tensile steel (HTSS)), piano wire, or the like may be used.
The invention of Example 5 may be applied to Examples 2 to 4, the invention of Example 6 may be applied to Examples 2 to 4, and the invention of Example 7 may be applied to Examples 2 to 4. May be applied to.

When the outer cover layer 51, the electromagnetic wave shield layer 50, and the net-like jacket 52 are provided, the outer cover layer 51, the electromagnetic wave shield layer 50, and the net-like jacket 52 all have a small thickness, and the protrusion 13x of the attaching/detaching means is provided. The recess 13y has a structure exposed to the outside without being covered by the outer cover layer 51, the electromagnetic wave shield layer 50, and the net-like jacket 52.

Further, the net-like jacket 52 is not limited to be provided so as to be able to be expanded and contracted, and is oriented toward the center of the diameter Df of the net-like jacket 52 so that the diameter is continuously deformed in the small diameter direction from the large diameter to the small diameter. It may be provided so that it can be reduced in diameter and deformed.

[Modification]
(A) The power line structure for transmission is not limited to the in-wheel motor 3, but the connection between an electronic control unit (ECU) with a built-in computer and various in-vehicle sensors is, of course, a drive monitor, an in-vehicle navigation device, and a data processing. The present invention may be applied to electronic parts such as parts, security devices, etc., or to general electrical components that can be connected by components around the vehicle body or a wire harness.

(B) Instead of the attaching/detaching means, which is composed of the protrusion 13x and the recess 13y, the adjacent coil layer portions 13a may be held at the contact position H2 via an adhesive capable of peeling. In this case, the adjacent coil layer portions 13a are released by peeling against each other against the adhesive force of the adhesive, whereby the covered coil layer 13 is extended to the extension position H1 by releasing the elastic force.

(C) The resin material of the coated coil layer 13 may be EPDM (ethylene/propylene/diene/methylene rubber) instead of polyurethane resin or chlorinated polyolefin, or polyamide (PA), polyester, polyimide, polyamide. Imide, polyacetal, polycarbonate (PC), polyphenylene ether (PPE), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene (PE), polytetrafluoroethylene (PTFE), syndiotactic polystyrene (SPS), etc. Engineering plastic materials may be used. Also, as the insulating paint layer 4, a desired material may be selected from the above plastic materials.

In the power line structure for transmission according to the present invention, the generation of eddy currents caused by the skin of the coil winding and the proximity effect in the coil layer portion is suppressed, the decrease in power transfer efficiency is suppressed, and the transmission loss is minimized. At the same time, an electromagnetic wave shielding function is added. Demand from related businesses focusing on these usefulness is stimulated, and it is possible to contribute to the machine industry through the distribution of related parts.

1A Power line structure for transmission 3 In-wheel motor 6 Power line 12 Coil winding 12a Hollow shaft 13 Coated coil layer 13A Twisted part 13a Coil layer part 13x Projection (detachment means)
13y recess (attaching/detaching means)
15 Multicore Laminated Part 15a Outer Layer 15b Middle Layer 15c Inner Layer 16 Outer Twisted Wire 17 Middle Twisted Wire 18 Inner Twisted Wire 50 Electromagnetic Wave Shield Layer 51 Outer Layer 52 Netted Jacket Ax Axial Direction of Multicore Laminated Area Df Diameter Dimension of Netted Jacket H1 Elongation position
H2 Contact position L Longitudinal direction R First radial direction Rs Second radial direction Sp Space portion

Claims (13)

A coil winding (12) formed by continuously winding an element wire into a spiral coil, and having an inner hollow shaft (12a) as a longitudinal direction (L);
A coated coil layer (13) made of an elastic resin, which is provided in close contact with the outer surface of the coil winding (12), integrally encloses the coil winding (12), and has an elastic force-accumulating force against its own deformation. ) And
A contact position (H1) at which the coil layer portions (13a) of the coating coil layer (13) adjacent to each other contact each other along the longitudinal direction (L) against the elastic force. And the coil layer portions (13a) having the single pitch are displaced and deformed in the first radial direction (R) orthogonal to the longitudinal direction (L) by the elastic force, and the coil layer portions (13a) are deformed. (13a) is configured to be elastically displaceable between an extension position (H2) in which they extend in the first radial direction (R) and separate from each other,
The coil layers (13a) having a single pitch adjacent to each other are held at the abutting positions (H1) where they are in contact with each other, and the coil layers (13a) having a single pitch adjacent to each other are contacted with each other. Detachable means (13x, 13y) for releasing from the contacting position (H1) in contact with each other and displacing to the extended position (H2),
At the extension position (H2), one (13A) of the portions twisted by the displacement deformation of the coil layer portion (13a) is bent so as to form a predetermined angle (θ), and the other. (13B) is a power line structure for transmission, which is configured by being bent to have a small loop wire. A cylindrical electromagnetic wave which is composed of a single layer or a plurality of layers provided by covering the outer peripheral surface of the coated coil layer (13) excluding the attachment/detachment means (13x, 13y) and having a high flexibility. With a shield layer (50),
The coil winding (12) comprises a multi-core laminated part (15) in which twisted wires (16, 17, 18) are laminated in a plurality of layers, and each layer (15a, 15b, 15b, 15b) of the multi-core laminated part (15). 15c) are arranged concentrically, and the diameter of the stranded wire of each layer (15a, 15b, 15c) is set so as to gradually increase from the inner layer to the outer layer. Power line structure for transmission. The coil winding (12) comprises a multi-core laminated part (15) in which twisted wires (16, 17, 18) are laminated in a plurality of layers, and each layer (15a, 15b, 15b, 15b) of the multi-core laminated part (15). 15c) are arranged concentrically, and the diameter of the stranded wire of each layer (15a, 15b, 15c) is set to gradually increase from the inner layer to the outer layer,
A flexible and flexible cylindrical electromagnetic wave shield layer (50) composed of a single layer or a plurality of layers is provided so as to cover the outer peripheral surface of the multi-core laminated portion (15), and the electromagnetic wave shield is provided. The power line structure for transmission according to claim 1, wherein a layer (50) is arranged so as to be present between the coated coil layer (13) and the multi-core laminated portion (15). A protrusion (13x) is formed on one of the coil layer portions (13a) and a recess (13y) is formed on the other, and the protrusion (13x) and the recess (13y) are attached to and detached from each other. Means for holding the coil layer portions (13a) at the contact position (H1) by the detachable engagement of the protrusion (13x) and the recess (13y), and the recess (13y). ), the coil layer portions (13a) are released from the engagement and extended in the first radial direction (R) by the elastic accumulating force of the coil layer portions (13a). The power line structure for transmission according to claim 1, wherein the power line structure is modified and arranged in (H2). The power line structure for transmission according to claim 1, wherein the predetermined angle (θ) is set within a range of 40° to 120°. The twisted wires of the layers (15a, 15b, 15c) are arranged in a circumscribing state along the circumferential direction (Cs) of the multi-core laminated portion (15), and the radial directions of the twisted wires of the layers are: The transmission according to claim 2 or 3, wherein the multi-core laminated portion (15) is fitted so as to be linearly aligned along the second radial direction (Rs). Power line structure for. The twisted wires of the layers (15a, 15b, 15c) are arranged in a circumscribing state along the circumferential direction (Cs), and the number of the twisted wires of the layers (15a, 15b, 15c) is the same. The power line structure for transmission according to claim 2, wherein the number is the same. The central portion of the multi-core laminated portion (15) has a structure in which a hollow space portion (Sp) extending along the axial direction (Ax) of the multi-core laminated portion (15) is formed. The power line structure for transmission according to any one of claims 2 and 3. The communication wire (21) enclosed in a tube (20) is arranged along the axial direction (Ax) in the space portion (Sp), according to claim 8. Power line structure. The multi-core laminated part (15) has a desired cross-sectional area set to a predetermined compression ratio, the desired cross-sectional area is in the range of 15 to 25 square mm, and the compression ratio is 60 to 80. The power line structure for transmission according to claim 2, wherein the power line structure is in the range of %. The resin material of the coated coil layer (13) is one selected from a group of vinyl polymers consisting of polyethylene, polystyrene, polypropylene and polyvinyl chloride, and a group of condensation polymers consisting of polyester and polyamide. The power line structure for transmission according to claim 1. A net-like jacket (52), which is formed by braiding a plurality of long thin metal wires (52a, 52b) into a tubular shape, is flexible and rich in flexibility, and is expandable and contractible in the radial direction. 2. 52) is attached to the outer peripheral surface of the coated coil layer (13) in a reduced-diameter deformed state by covering the portion excluding the attaching/detaching means (13x, 13y) in a tightly bound state. Power line structure for transmission of electricity. A plurality of long thin metal wires (52a, 52b) are knitted in a tubular shape to form a net-like jacket (52) which is flexible and highly flexible and can be expanded and contracted in the radial direction. The outer peripheral surface of (50), on the portion excluding the attaching/detaching means (13x, 13y), the reticulated jacket (52) is attached by covering in a tightly bound state in a reduced diameter deformed state. Power line structure for transmission of electricity.

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