JP2020057538A - Power line structure for transmission - Google Patents

Abstract

To provide a power line structure for transmission that suppresses decrease of power transmission efficiency and minimizes transmission loss by suppressing the generation of eddy currents due to the skin of the coil winding and the proximity effect at coil layer parts 13a.SOLUTION: One of twisted portions 13c of a coil layer part 13a, which are twisted due to positional displacement deformation, is bent to form a predetermined angle θ. In a twisted portion 13A of the coil layer part 13a, a leading strand 13b and a trailing strand 13c have a current I flowing in opposite directions. A magnetic flux front surface 13f is formed by the magnetic flux generated by the leading strand 13b, and the magnetic flux rear surface 13g is formed by the magnetic flux generated by the trailing strand 13c. As a result, the front surface 13f of the magnetic flux and the rear surface 13g of the magnetic flux generated by the current I flowing in opposite directions form a predetermined angle φ.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an improvement in a power transmission line structure applied to an electric system, and more particularly to a transmission power line structure requiring a high electric capacity.

  In the automotive industry, various electric wires are used as connection wire harnesses for supplying power to electrical components. Examples of this type of application include connection 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 connection to sensors for EMB (Electric Motor Brake). As another application example, it is used for connection between an electronic control unit (ECU) containing a computer and various in-vehicle sensors.

  In vehicles that use a storage battery as a power source, such as EV vehicles and PHEV vehicles, it is necessary to supply a high electric capacity to a drive motor such as an in-wheel motor in order to adjust the rotation speed (see Patent Document 1). . For this reason, it is necessary that the power line to the drive motor be a multi-core laminated electric wire, and be configured as a close-packed shape that is close to a perfect circular shape and is hardly deformed (see Patent Documents 2 to 5).

  Incidentally, the stranded 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 element wires arranged on the same circumference. In the outer layer, the number of wires forming each layer is the same, and the diameter of the wires in each layer is set to the same size. This structure makes it difficult for the sliding phenomenon to occur on the contact surface of the strand, to prevent the untwisting from occurring, and to prevent the opening of the twist from occurring.

  In addition, when the power line is used as a collective 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).

JP-A-2013-131629 JP 2009-158331 A JP-A-2017-183068 JP 2008-21603 A JP 2001-35260 A JP 2013-207907 A

However, in recent years, the automotive industry has been focusing on reducing the weight of vehicles.Therefore, it is also required to reduce the weight of electric wires. It is not sufficient from the viewpoint of weight reduction while securing electric capacity.
For this reason, while laying out electric wires, the power line structure is capable of reducing the transmission loss while reducing the weight of the electric wire structure and forming a densely packed multi-core laminated electric wire to realize high-capacity power supply. Has been requested.

  The present invention has been made in view of the above circumstances, and its purpose is to enable power supply with high electric capacity, suppress the occurrence of eddy current due to the skin and proximity effect, and improve the power transmission efficiency. An object of the present invention is to provide a transmission power line structure capable of suppressing a reduction in transmission loss and minimizing transmission loss.

(About claim 1)
The wire is formed by continuously winding a wire into a spiral coil shape, and a coil winding having a hollow shaft inside as a longitudinal direction is provided. The coil winding is provided in close contact with the outer surface of the coil winding to form a coated coil layer made of an elastic resin and integrally including the coil winding. The coated coil layer holds an urging force against its own deformation as an elastic force.
A contact position is defined as a state in which adjacent single-pitch coil layer portions of the covered coil layer abut against each other along the longitudinal direction against their elastic energy.
When the coil layers of a single pitch are displaced and deformed in the radial direction orthogonal to the longitudinal direction, the coil layers are extended along the radial direction by their elastic energy and separated from each other. And The coil layers are configured to be elastically displaceable between a contact position and an extended position.
The attaching / detaching means abuts the single-pitch coil layer portions adjacent to each other to hold the abutting position, and releases the contact between the adjacent single-pitch coil layer portions to displace to the extended position. Let it.
One of the portions twisted due to the displacement deformation of the coil layer portion is bent to form a predetermined angle, and the other is bent to a small diameter loop line.
The coil winding is composed of a multi-core laminated portion in which stranded wires are laminated in a plurality of layers, each layer of the multi-core laminated portion is arranged concentrically, and the diameter of each layer is set so as to gradually increase as going from the inner layer to the outer layer. ing.

According to the first aspect, one of the portions twisted by the displacement deformation of the coil layer portion is bent to form a predetermined angle.
In the “torsion front” and the “torsion rear” in the twisted portion of the coil layer portion, the current flows in opposite directions. The front surface of the magnetic flux formed by collecting the magnetic fluxes generated at the “pre-torsion” is defined as the front surface of the magnetic flux formed by collecting the magnetic flux generated at the “post-torsion”.
The front surface of the magnetic flux and the rear surface of the magnetic flux generated by the opposite directions of the current flow are not on the same plane but form a predetermined angle.
As a result, unlike the case where the magnetic flux front surface and the magnetic flux rear surface are on the same plane, the generation of eddy current due to the skin and proximity effect of the coil winding in the coil layer part is suppressed, and the decrease in power transmission efficiency is suppressed. Transmission loss can be minimized.
In addition, the coil winding is composed of a multi-core laminated portion in which the stranded wires are laminated in a plurality of layers, each layer of the multi-core laminated portion constitutes a stranded wire, and the diameter of the stranded wire of each layer goes from the inner layer to the outer layer. It is set to increase gradually. For this reason, dense packing of each layer is realized, and high electric capacity of the multi-core laminated portion can be ensured.

(About claim 2)
A protrusion is formed on one of the coil layers, and a recess is formed on the other. The coil layers are held at the contact positions by detachable engagement between the protrusions and the recesses through detaching means. When the protrusion is separated from the recess, the coil layer portions are radially stretched by their own elastic energy, and are deformed to the extended position.

In the second aspect, at the contact position, the coil layer portions form a compact coil layer structure in which the coil layer portions overlap in the longitudinal direction in the contact state.
When the protrusion is separated from the recess, the coil layer portions can be radially stretched by their own elastic storage force and deformed to the extended position. For this reason, even if it is a compact coil layer structure, it can be used for electrical connection between the terminals existing in a long section by deforming and disposing the coil layer portions at the extended position.

(About claim 3)
Since the angle of the twisted portion is set in the range of 40 ° to 120 °, the angle range is wide and easy to set.

(About claim 4)
The stranded wires of each layer are arranged in a circumscribed state along the circumferential direction of the multi-core laminated portion, and the diametrical directions of the stranded wires of each layer are combined so that all of them overlap along the second radial direction of the multi-core laminated portion. I do. Thereby, similarly to the first aspect, dense packing of each layer is realized, and high electric capacity of the multi-core laminated portion can be ensured.

(About claim 5)
The stranded wires of each layer are arranged in a circumscribed state along the circumferential direction, and the number of stranded wires of each layer is set to the same number without difference. Also in this case, as in the first aspect, dense packing of each layer is realized, and high electric capacity of the multi-core laminated portion can be secured.

(About claim 6)
The central portion of the multi-core laminated portion forms a hollow space along the axial direction of the multi-core laminated portion. For this reason, it is possible to ensure high bending performance of the multi-core laminated portion.

(About claim 7)
Since a communication line enclosed in a tube is provided in the space, a communication function is added, and multi-functionalization of the multi-core laminated portion can be realized.

(About claim 8)
Since the multi-core laminated portion has a desired cross-sectional area set at a predetermined compression ratio, it is possible to ensure a high electric capacity of the multi-core laminated portion.

(About claim 9)
Since the cross-sectional area of the multi-core laminated portion is in the range of 15 to 25 mm2 and the compression ratio is in the range of 60 to 80%, high electric capacity of the multi-core laminated portion can be ensured.

(About claim 10)
The resin material of the coated coil layer is one selected from a vinyl-based polymer group consisting of polyethylene, polystyrene, polypropylene and polyvinyl chloride, and a condensation-based polymer group consisting of polyester and polyamide.
Accordingly, the coated coil layer can be formed of a synthetic resin having high elasticity, and the coil layer portions can be quickly and smoothly deformed and arranged from the contact position to the extended position.

FIG. 2 is a longitudinal sectional view showing a structure in which a transmission power line structure used in an electric system is applied to an in-wheel motor (Example 1). (A) is a front view showing the coated coil layer at the contact position, and (b) and (c) are front views showing the coated coil layer at the extended position (Example 1). (A)-(c) is explanatory drawing which shows the aspect which a coating coil layer displaces from an extension position to a contact position (Example 1). FIG. 2A is a perspective view showing a multi-core laminated portion of a coil winding partially cut away, and FIG. 2B is a cross-sectional view showing a multi-core laminated wire of the coil winding (Example 1). It is a perspective view which shows the multicore laminated | stacked part of a coil winding partly broken, and shows (Example 2). It is a cross-sectional view showing a multi-core laminated portion of a coil winding (Example 3). It is a cross-sectional view which shows the multi-core laminated | stacked part of a coil winding (Example 4).

  In the transmission power line structure according to the present invention, one of the portions twisted due to the displacement deformation of the coil layer portion is bent to form a predetermined angle. In the coil layer portion, the front and rear surfaces of the magnetic flux generated by the opposite directions of the current flow are not on the same plane but at a predetermined angle, and the skin of the coil winding and the proximity effect in the coil layer portion are formed. The generation of eddy currents caused by the above is suppressed to minimize the transmission loss.

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, a sensor (not shown) for driving electrical components such as an ABS (Anti-lock braking system) and an EPB (Electric parking brake) installed in a vehicle is used. It is useful for transmitting signals 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 car or a PHEV car.
As the power source, for example, a battery assembly (single-cell stacked body) in which a plurality of thin rectangular batteries are arranged as a single secondary battery in parallel in the left-right direction and stacked one on another is used as the 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, for example, as shown in FIG. 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 formed of a damper.

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

  The storage battery 8 as a battery is connected to the inverter 7 via a system main relay 9 and a 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 serving as the power supply lines Lu, Lv, Lw, and Ls is formed by continuously winding element wires in a spiral coil shape, and the hollow shaft 12a inside is set to 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 a coating coil layer 13 made of an elastic resin and integrally including 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 one selected from a group of vinyl polymers composed of highly elastic polyethylene, polystyrene, polypropylene and polyvinyl chloride, and a group of condensation polymers composed of polyester and polyamide. I have.
A contact position H1 is a state in which the adjacent single-pitch coil layer portions 13a of the covered coil layer 13 abut or closely contact each other along the longitudinal direction L against their elastic energy. (A)).
Here, since the covering coil layer 13 integrally includes the covering layer 12A, the covering coil layer 13 retains the above-mentioned elastic energy as an urging force against its own deformation.

  The adjacent single-pitch coil layer portions 13a of the covered coil layer 13 are displaced and deformed in the first radial direction R perpendicular to the longitudinal direction L by their elastic energy, and the coil layer portions 13a are displaced from each other. The state of extending along the radial direction R and separating from each other is defined as an extended position H2 (see FIGS. 2B and 2C). The coil layer portions 13a of the covered coil layer 13 are configured to be elastically displaceable between a contact position H1 and an extended position H2.

  That is, in the free state, the covered coil layer 13 is formed in a predetermined shape at the extension position H2 as shown in FIG. 3A, and the covered coil layer 13 is moved from the extension position H2 to the contact position H1. When it is elastically displaced, it is pushed back against the elastic energy of the coated coil layer 13 (see FIGS. 3B and 3C).

  Because, during the process of elastic displacement from the extension position H2 to the contact position H1, the coated coil layer 13 is given an elastic energy, and the coated coil layer 13 is moved from the contact position H1 to the extended position by the elastic energy. It will be extended to H2.

  To displace the covered coil layer 13 from the contact position H1 to the extended position H2, the covered coil layer 13 is pulled as shown by arrows E1 and E2 in FIG. Bend like so. As a result, the protrusion 13x described later escapes from the recess 13y and separates, so that the coated coil layer 13 is free and is extended to the extended position H2 by the elastic force.

  A protrusion 13x is formed on one of the coil layers 13a, and a recess 13y is formed on the other. The protrusion 13x and the recess 13y constitute a detachable unit, and the detachable engagement between the protrusion 13x and the recess 13y holds the coil layers 13a at the contact position H1 by contact. When the protrusion 13x separates from the recess 13y, the coil layers 13a are released from contact with each other, are extended from the contact position H1 in the first radial direction R by their own elastic energy, and are deformed to the extended position H2.

  That is, the attachment / detachment means makes the adjacent single-pitch coil layer portions 13a abut against each other and holds them at the abutment position H1, and releases the abutment between the adjacent single-pitch coil layer portions 13a. To the extended position H2.

  At the extension position H2, twisted portions are generated on both the upper and lower sides in the figure due to the displacement deformation of the coil layer portion 13a. One of the twisted portions 13A is bent such 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 °) (FIG. 2). (B)). The other twisted portion 13B is bent as a small-diameter loop wire (13B) by the front short line element 13d and the rear short line element 13e.

As shown in FIGS. 4A and 4B, the coil winding 12 includes a multi-core laminated portion 15 in which stranded 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 diameter of the outer layer 15a, the middle layer 15b, and the inner layer 15c is changed 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.
The gradual increase ratio may be set arbitrarily, or may be set so as to gradually increase as, for example, an arithmetic series or a geometric series.

As an example of the multi-core laminated portion 15, the outer layer 15a is provided with seven inner stranded wires 16 in which a number of fine wires having a diameter (φ) of 0.08 mm are bundled as stranded wires.
The middle layer 15b is provided with nine medium-twisted wires 17 in which a large number of thin wires having a diameter (φ) of 0.05 mm are bundled. The inner layer 15c is provided with twelve outer stranded wires 18 in which a large number of fine wires having a diameter (φ) of 0.03 mm are bundled.

In this case, the radial directions of the outer stranded wire 16, the middle stranded wire 17, and the inner stranded wire 18 match so that all of them overlap in a straight line along the second radial direction Rs of the multi-core laminated portion 15. .
That is, the stranded wires (the outer stranded wires 16, the middle stranded wires 17, and the inner stranded wires 18) of the respective layers (the outer layer 15a, the middle layer 15b, and the inner layer 15c) are circumscribed along the circumferential direction Cs of the multi-core laminated portion 15, And it is arranged in a circumscribed state along the second radial direction Rs.

  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 depending on the use situation. Further, the number of the outer stranded wires 16, the middle stranded wires 17, and the inner stranded wires 18 in the respective layers of the outer layer 15a, the middle layer 15b, and the inner layer 15c may be increased or decreased as desired.

The inner stranded wires 16 are arranged on the same circle with the same diameter, the inner stranded wires 16 are arranged on the same circle with the same diameter, and the outer stranded wires 18 are arranged on the same circle with the same diameter. , The outer layer 15a, the middle layer 15b, and the inner layer 15c are arranged concentrically.
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, so that high bending performance of the multi-core laminated portion 15 can be ensured.

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 compression ratio of the multi-core laminated portion 15 is in the range of 60 to 80% (preferably 70%). Is set to This is to ensure a high electric capacity of the multi-core laminated portion 15.
When the multi-core laminated portion 15 is set to the same area as the above and is configured by a thin wire having a diameter of 0.05 mm to 0.08 mm, it is estimated that about 50,000 thin wires are required, Has become.

[Operation and effect of the first embodiment]
In the first embodiment, one of the twisted portions 13c of the portion twisted due to the displacement deformation of the coil layer portion 13a is bent to form a predetermined angle θ (see FIG. 2B).
In the “leading wire 13b (pre-torsion)” and “following wire 13c (post-twisting)” in the twisted portion 13A of the coil layer portion 13a, the directions in which the current I flows are opposite. A magnetic flux front surface 13f formed by collecting magnetic fluxes generated by the “leading wire 13b” and a magnetic flux rear surface 13g formed by collecting magnetic fluxes generated by the “following wire 13c”.

In this case, the front surface 13f of the magnetic flux and the rear surface 13g of the magnetic flux generated by the opposite directions of the current I are not on the same plane but 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 the 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 reduced. Transmission loss can be minimized by suppressing the reduction.

  Further, the coil winding 12 is composed of a multi-core laminated portion 15 in which stranded wires (external stranded wires 16, middle stranded wires 17, and inner stranded wires 18) are laminated in a plurality of layers. 15b and 15c constitute a stranded wire, and the diameter of the stranded wire in each layer is set so as to gradually increase from the inner layer to the outer layer. For this reason, 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 closely overlap each other. When the projection 13x is separated from the recess 13y, the coil layers 13a can be extended in the first radial direction R by their own elastic energy, and can be deformed to the extended position H2.
For this reason, even if it is a compact coil layer structure, it can be used for electrical connection between terminals in a long distance section by deforming and disposing the coil layer portions 13a at the extension position H2.

  FIG. 5 shows a second embodiment of the present invention. The second embodiment is different from the first embodiment in that a communication line 21 sealed in a rubber tube 20 is arranged in a space Sp of the multi-core laminated portion 15. Thereby, the communication function is added, and the versatile use or multifunctionalization of the multi-core laminated portion 15 can be realized.

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

That is, the stranded wires (the outer stranded wire 16, the middle stranded wire 17, and the inner stranded wire 18) of each layer (the outer layer 15a, the middle layer 15b, and the inner layer 15c) are arranged in a circumscribed state along the circumferential direction Cs, and The number of arrangements is the same number with no difference.
For this reason, all the radial directions of the middle twisted wire 17, the outer twisted wire 16, and the inner twisted wire 18 do not always match along the second radial direction Rs of the multi-core laminated portion 15.

  In the third embodiment, 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 significantly improved, and excellent electric capacity can be realized. At this time, the communication line 21 sealed in the tube 20 is provided in the space Sp of the multi-core laminated portion 15 as in the second embodiment, but the communication line 21 is omitted and the space Sp is opened. It may be as it is.

The invention of the third embodiment shown in FIG. 6 corresponds to the invention described in Japanese Patent Application Laid-Open No. 2009-158331 (Japanese Patent No. 4673361) described in the section of [Background Art].
Since the patentee of Japanese Patent No. 4673361 is Misu Electric Wire Co., Ltd., in the implementation of the present invention, he has agreed to make a separate provision regarding the license from Misu Electric Wire Co., Ltd.

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

In this case, the communication line 21 sealed in the rubber tube 20 is disposed in the hollow portion Sp of the multi-core laminated portion 15 as in the second embodiment.
In the fourth embodiment, in addition to the outer stranded wire 16, the middle stranded wire 17, and the inner stranded wire 18, the first to third conductive wires (K1 to K3) can be densely packed with high density.

(Modification)
(A) The power line structure for transmission is not limited to the in-wheel motor 3, but includes not only the connection of an electronic control unit (ECU) with a built-in computer to various in-vehicle sensors, but also a drive monitor, an in-vehicle navigation device, and data processing. The present invention may also be applied to general electronic components that can be connected to electronic circuits such as units, security devices, or the like, or to components around the vehicle body or wire harnesses.

(B) Instead of the attachment / detachment means consisting of the projection 13x and the recess 13y, the adjacent coil layers 13a may be held at the contact position H2 via a peelable adhesive. In this case, the coil layers 13a adjacent to each other are released by peeling against each other against the adhesive force of the adhesive, so that the coated coil layer 13 is extended to the extension position H1 by releasing the elastic energy.

(C) As the resin material of the coated coil layer 13, EPDM (ethylene propylene diene methylene rubber) may be used 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) or syndiotactic polystyrene (SPS) 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 current due to the skin and proximity effect of the coil winding in the coil layer portion is suppressed, the reduction in power transmission efficiency is suppressed, and the transmission loss is minimized. . Demand from related businesses focusing on their usefulness is aroused, and it is possible to contribute to the machinery industry through the distribution of related parts.

Reference Signs List 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 portion 13a Coil layer portion 13x Projection (detachment means)
13y recess (removal means)
15 Multi-core laminated portion 15a Outer layer 15b Middle layer 15c Inner layer 16 Outer stranded wire 17 Middle stranded wire 18 Inner stranded wire H1 Extended position H2 Contact position L Longitudinal direction R First radial direction Rs Second radial direction Sp Space

Claims (10)

A coil winding (12) formed by continuously winding an element wire in a spiral coil shape and having an internal hollow shaft (12a) in a longitudinal direction (L);
A coiled coil layer (13) made of an elastic resin, which is provided in close contact with the outer surface of the coil winding (12), integrally includes the coil winding (12), and has an elastic energy storing force against its own deformation. ) And
A contact position (H1) where adjacent single-pitch coil layer portions (13a) of the covered coil layer (13) abut against each other in the longitudinal direction (L) against the elastic force. And the single-pitch coil layer portions (13a) are displaced and deformed in the first radial direction (R) orthogonal to the longitudinal direction (L) by the elastic force. (13a) are configured to be elastically displaceable between an extended position (H2) where the extended portions are separated from each other by extending along the first radial direction (R),
The adjacent single-pitch coil layer portions (13a) are held at the contact position (H1) where the adjacent single-pitch coil layer portions (13a) are in contact with each other, and the contact portions of the adjacent single-pitch coil layer portions (13a) are contacted with each other. Detachable means (13x, 13y) for releasing from the contact position (H1) in contact with and displacing to the extended position (H2);
At the extension position (H2), one of the portions (13A) of the coil layer portion (13a) twisted by the displacement deformation is bent to form a predetermined angle (θ) and the other (13B). ) Is configured to be bent into a small diameter loop wire,
The coil winding (12) includes a multi-core laminated portion (15) in which stranded wires (16, 17, 18) are laminated in a plurality of layers, and each layer (15a, 15b, 15c) is a concentrically disposed power line structure for transmission, wherein the diameter of the stranded wire of each of the layers (15a, 15b, 15c) is set so as to gradually increase from the inner layer to the outer layer.   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 and detached. The coil layer portions (13a) are held at the contact position (H1) by detachable engagement between the protrusions (13x) and the recesses (13y), and the recesses (13y). ), The coil layers (13a) are released from the engagement with each other, and are extended in the first radial direction (R) by the elastic storage force of the coil layers (13x) when the protrusions (13x) are disengaged from the projections (13x). The power line structure for transmission according to claim 1, wherein the transmission power line structure is configured to be deformed and arranged in (H2).   2. The transmission power line structure according to claim 1, wherein the predetermined angle (θ) is set within a range of 40 ° to 120 °. 3.   The stranded wires of the respective layers (15a, 15b, 15c) are arranged in a circumscribed state along a circumferential direction (Cs) of the multi-core laminated portion (15), and each radial direction of the stranded wires of the respective layers is: 2. The transmission power line structure according to claim 1, wherein the power line structure is matched so as to overlap in a straight line along a second radial direction (Rs) of the multi-core laminated portion (15).   The stranded wires of each of the layers (15a, 15b, 15c) are arranged in a circumscribed state along the circumferential direction (Cs), and the number of stranded wires of each of the layers (15a, 15b, 15c) does not differ in number. The power line structure for transmission according to claim 1, wherein the number is the same.   The central portion of the multi-core laminated portion (15) has a configuration in which a hollow space (Sp) extending along the axial direction (Ax) of the multi-core laminated portion (15) is formed. The transmission power line structure according to claim 1.   The power line structure for transmission according to claim 6, wherein a communication line (21) sealed in a tube (20) is provided in the space (Sp).   The power line structure for transmission according to claim 1, wherein the multi-core laminated portion (15) is set to a predetermined compression ratio and has a desired cross-sectional area.   The transmission power line structure according to claim 8, wherein the cross-sectional area is in a range of 15 to 25 mm2, and the compression ratio is in a range of 60 to 80%.   The resin material of the coated coil layer (13) is one selected from a vinyl polymer group consisting of polyethylene, polystyrene, polypropylene and polyvinyl chloride, and a condensation polymer group consisting of polyester and polyamide. The power line structure for transmission according to claim 1.

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