JP6457145B1 - Power line structure for transmission - Google Patents

Abstract

Provided is a power line structure for transmission that suppresses generation of eddy currents due to the skin of a coil winding and a proximity effect in a coil layer portion 13a, and suppresses a decrease in power transmission efficiency to minimize transmission loss. To do. One twisted portion of a portion twisted by displacement displacement of a coil layer portion is bent to form a predetermined angle θ. In the twisted portion 13A of the coil layer portion 13a, the direction in which the current I flows is opposite between the leading strand 13b and the trailing strand 13c. A magnetic flux front surface 13f formed by collecting magnetic fluxes generated by the preceding strand 13b and a magnetic flux rear surface 13g formed by collecting magnetic fluxes generated by the trailing strand 13c. As a result, the magnetic flux front surface 13f and the magnetic flux rear surface 13g, which are generated when the current I flows in opposite directions, form a predetermined angle φ. [Selection] Figure 2

Description

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

  In the automobile industry, various electric wires are used as wire harnesses for connection in order to supply electric 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 brakes). As another application example, it is used for connection between an electronic control unit (ECU) incorporating a computer and various in-vehicle sensors.

  Among vehicles, EVs, PHEV vehicles, and other vehicles that use a storage battery as a power source need to supply power to a drive motor such as an in-wheel motor with a high electric capacity in order to adjust the rotational speed (see Patent Document 1). . For this reason, the power line to the drive motor is a multi-core laminated electric wire, and it is necessary to configure it as a close-packed close-packed shape that is hardly broken and difficult to 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 circumference. In the outer layer, the number of wires constituting each layer is the same, and the diameters of the wires in each layer are also set to the same size. With this structure, the slip phenomenon on the contact surface of the strands hardly occurs, the twisting does not easily occur, and the opening of the twists hardly occurs.

  Moreover, when a power line is used as a collective line, it is necessary to suppress the generation of eddy currents due to the skin and proximity effect so that the power transmission efficiency does not decrease (see Patent Document 6).

JP2015-131629A JP 2009-158331 A JP 2017-1830886 A JP 2008-21603 A JP 2001-35260 A JP 2013-207907 A

However, since the recent automobile industry has focused on reducing the weight of vehicles, there is a demand for reducing the weight of wires. It is insufficient from the viewpoint of weight reduction while ensuring electric capacity.
For this reason, the wiring of the power line structure can reduce the transmission loss after realizing a high-capacity power supply by constructing a multi-core laminated electric wire as close packing while reducing the weight of the electric wire structure Is required to appear.

  The present invention has been made in view of the above circumstances, and its purpose is to enable high-capacity power feeding and to suppress the generation of eddy currents due to the skin and proximity effects, thereby improving power transmission efficiency. An object of the present invention is to provide a power line structure for transmission that can suppress a reduction and minimize transmission loss.

(About claim 1)
An element winding is formed by continuously winding a spiral coil, and a coil winding having an internal hollow shaft as a longitudinal direction is provided. A coated coil layer made of an elastic resin, which is provided in close contact with the outer surface of the coil winding and integrally encloses the coil winding, is configured. The coated coil layer has an urging force against its deformation as an elastic energy.
The contact position is a state in which the coil layer portions of the single pitch adjacent to each other of the coated coil layer are in contact with each other along the longitudinal direction against the elastic energy storage force.
The coil layer portions of a single pitch are displaced in the radial direction perpendicular to the longitudinal direction, and the coil layer portions are extended and separated along the radial direction by the elastic energy storage force. It is said. The coil layer portions are configured to be elastically displaceable between the contact position and the extended position.
The attaching / detaching means abuts the coil layers of single pitch adjacent to each other and holds them in the contact position, and releases the contact between the coil layers of adjacent single pitches to the extended position. Let
One of the portions twisted by the displacement displacement of the coil layer portion is bent to form a predetermined angle, and the other is bent to a small loop wire.
The coil winding consists of a multi-core laminated part in which stranded wires are laminated in a plurality of layers, each layer of the multi-core laminated part is arranged concentrically, and the diameter dimension of each layer is set so as to gradually increase from the inner layer to the outer layer. ing.

According to the first aspect, one of the portions twisted by the displacement displacement of the coil layer portion is bent so as to form a predetermined angle.
In the “twisted front part” and the “twisted rear part” in the twisted portion of the coil layer part, the directions of current flow are contradictory. A magnetic flux front surface formed by gathering magnetic fluxes generated at the “twisted front portion” and a magnetic flux rear surface formed by collecting magnetic fluxes generated at the “twisted rear portion”.
The magnetic flux front surface and the magnetic flux rear surface, which are generated when the current flow directions are opposite to each other, 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 plane, 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.
In addition, 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 constitutes a stranded wire, and the diameter of the stranded wire of each layer is changed from the inner layer to the outer layer. It is set to increase gradually. For this reason, close-packing of each layer is realized, and a high electrical capacity of the multi-core laminated portion can be secured.

(About claim 2)
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 in contact with each other by detachable engagement between the protrusion and the recess through the attaching / detaching means. At the time of detachment of the protrusion from the recess, the coil layer portions are stretched in the radial direction by their own elastic energy and deformed and arranged at the extended position.

According to a second aspect of the present invention, a compact coil layer structure is formed in which the coil layer portions overlap each other in the contact state in the longitudinal direction at the contact position.
When the protrusions are separated from the recesses, the coil layer portions can be stretched in the radial direction by their own elastic energy and deformed and arranged at the extended position. For this reason, even if it is a compact coil layer structure, it can use for the electrical connection between the terminals which exist in a long section by deform | transforming and arrange | positioning coil layer parts in an expansion | extension position.

(Claim 3)
Since the angle of the twisted portion is set within a range of 40 ° to 120 °, the angle range becomes wide and easy to set.

(About claim 4)
The stranded wires of each layer are arranged in a circumscribing state along the circumferential direction of the multi-core laminated portion, and the radial directions of the stranded wires of each layer are aligned so as to overlap all along the second radial direction of the multi-core laminated portion. I'm doing it. Thereby, similarly to the first aspect, close packing of each layer is realized, and a high electric capacity of the multi-core laminated portion can be ensured.

(Claim 5)
The stranded wires in each layer are arranged in a circumscribed state along the circumferential direction, and the number of stranded wires arranged in each layer is set to the same number with no difference in the number. This also realizes close-packing of each layer as in the case of claim 1 and can secure a high electric capacity of the multi-core laminated portion.

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

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

(About claim 8)
Since the multi-core laminated part is set to a predetermined compression rate and has a desired cross-sectional area, a high electrical capacity of the multi-core laminated part can be ensured.

(About claim 9)
Since the cross-sectional area of the multi-core laminated portion is in the range of 15 to 25 square mm and the compression rate is in the range of 60 to 80%, it is possible to ensure a high electric capacity of the multi-core laminated portion.

(About claim 10)
The resin material of the coated coil layer 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.
Accordingly, the coated coil layer can be formed of a synthetic resin having high elastic performance, and the coil layer portions can be quickly and smoothly deformed and arranged from the contact position to the extended position.

(Example 1) which is a longitudinal cross-sectional view which shows the structure which applied the power line structure for transmission used for an electric system to an in-wheel motor. (A) is a front view which shows the covering coil layer in a contact position, (b), (c) is a front view which shows the covering coil layer in an expansion | extension position (Example 1). (A)-(c) is explanatory drawing which shows the aspect which a coated coil layer displaces from an expansion | extension position to a contact position (Example 1). (A) is a perspective view showing a multi-core laminated part of a coil winding partly broken, (b) is a cross-sectional view showing a multi-core laminated wire of a coil winding (Example 1). (Example 2) which is a partially broken perspective view showing the multi-core laminated part of the coil winding. (Example 3) which is a cross-sectional view which shows the multi-core laminated part of a coil winding. (Example 4) which is a cross-sectional view which shows the multi-core laminated part of a coil winding.

  In the power line structure for transmission according to the present invention, one of the portions twisted by the displacement displacement of the coil layer portion is bent so as to form a predetermined angle. In the coil layer portion, the magnetic flux front surface and the magnetic flux rear surface generated by the opposite directions of current flow are not on the same plane, but form a predetermined angle, and the coil winding skin and proximity effect in the coil layer portion Suppresses the generation of eddy current due to the transmission to minimize transmission loss.

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 electrical components such as ABS (anti-lock braking system) and EPB (electric parking brake) equipped in an automobile. It is useful for signal transmission to an electric control unit (ECU) as a control computer. Especially, it is suitable as a power line to an in-wheel motor of an electric vehicle such as an EV vehicle or a PHEV vehicle.
As the power source, for example, a battery assembly (cell single-layer stack) in which a plurality of thin rectangular batteries are stacked in parallel in the left-right direction as a single secondary battery is used as the storage battery 8 described later.

  A 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 disposed inside the wheel 2, and a compression coil spring 5 is disposed so as to surround a shock absorber 4 made of a damper.

  Feed lines Lu, Lv, Lw, and Ls are connected as power lines 6 to 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.

  A storage battery 8 as a battery is connected to an 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).

  As shown in FIG. 2A, the power lines 6 as the feeder lines Lu, Lv, Lw, and Ls are formed by continuously winding the strands in a spiral coil shape, and the internal hollow shaft 12a is the longitudinal direction L. A coil winding 12 is provided. A coating layer 12 </ b> A is provided in close contact with the outer surface of the coil winding 12 to constitute a coated coil layer 13 made of an elastic resin that integrally encloses the coil winding 12.

  The element wire of the coil winding 12 is a metal wire having the same diameter and an equal 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 covering layer 12A in the covering coil layer 13 is selected as one selected from the group consisting of a vinyl polymer group consisting of polyethylene, polystyrene, polypropylene and polyvinyl chloride, and a condensation polymer group consisting of polyester and polyamide. Yes.
A state in which the coil layer portions 13a of the single pitch adjacent to each other of the coated coil layer 13 are in contact or in close contact with each other along the longitudinal direction L against the elastic accumulating force is defined as the contact position H1 (FIG. 2). (See (a)).
Here, since the covering coil layer 13 integrally includes the covering layer 12A, the covering coil layer 13 holds the above-described elastic accumulating force as an urging force against its deformation.

  The coil layer portions 13a adjacent to each other of the coated coil layer 13 are displaced in the first radial direction R perpendicular to the longitudinal direction L by the elastic energy, and the coil layer portions 13a are A state of extending and separating along the radial direction R is defined as an extended 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 extended position H2.

  That is, in the free state, the coated coil layer 13 is formed in 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 it is elastically displaced, it is pushed back against the elastic force of the coated coil layer 13 (see FIGS. 3B and 3C).

  This is because, in the process of elastic displacement from the extended position H2 to the contact position H1, the coated coil layer 13 is given an elastic energy, so that the coated coil layer 13 is extended from the contact position H1 by the elastic energy. 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. Bend like so. Thereby, since the protrusion 13x described later comes out of the recess 13y and is detached, the coated coil layer 13 becomes free and is extended to the extended position H2 by the elastic energy storing 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 held at the contact position H1 by contact by the detachable engagement of the projecting portion 13x and the recessed portion 13y. When the protrusion 13x is disengaged from the recess 13y, the coil layer portions 13a are released from contact and are stretched in the first radial direction R from the contact position H1 by their own elastic energy and deformed to the extended position H2.

  That is, the attaching / detaching means abuts the coil layers 13a of the single pitch adjacent to each other and holds them at the contact position H1, and releases the contact of the coil layers 13a of the single pitch adjacent to each other. To the extended position H2.

  At the extended position H2, twisted portions due to the displacement displacement of the coil layer portion 13a are generated both on the upper and lower sides in the drawing. One of the twisted portions 13A is bent so that the leading line element 13b and the trailing line element 13c form a predetermined angle θ (for example, within an angle range of 45 ° to 120 °) (FIG. 2). (See (b)). The other twisted portion 13B is bent as a small loop wire (13B) by the short wire element 13d and the rear short wire element 13e.

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

As an example of the multi-core laminated portion 15, the outer layer 15 a is provided with seven inner stranded wires 16 in which a large 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 middle stranded wires 17 in which a large number of fine wires having a diameter (φ) of 0.05 mm are bundled as stranded wires. 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 intermediate stranded wire 17, and the inner stranded wire 18 are matched so that all of them overlap in a straight line along the second radial direction Rs of the multicore laminated portion 15. .
That is, the stranded wire (outer stranded wire 16, intermediate stranded wire 17 and inner stranded wire 18) of each layer (outer layer 15a, intermediate layer 15b, inner layer 15c) is 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 concentric three 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. Moreover, you may increase / decrease the number of each of the outer twisted wire 16, the middle twisted wire 17, and the inner twisted wire 18 of each layer of the outer layer 15a, the middle layer 15b, and the inner layer 15c as desired.

The inner stranded wires 16 are arranged on the same circle with the same diameter size, the middle stranded wires 17 are also arranged on the same circle with the same diameter size, and the outer stranded wires 18 are also arranged on the same circle with the same diameter size. The outer layer 15a, the middle layer 15b, and the inner layer 15c are concentrically arranged.
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, thereby ensuring 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. This is to ensure a high electric capacity of the multi-core laminated portion 15.
If the multi-core laminated part 15 is set to have the same area as described above and is constituted by fine wires having a diameter of 0.05 mm to 0.08 mm, it is estimated that about 50,000 fine wires are required, which is a factor hindering realization. It has become.

[Effects of Example 1]
In the first embodiment, one twisted portion 13c of the portion twisted by the displacement displacement of the coil layer portion 13a is bent to form a predetermined angle θ (see FIG. 2B).
In the “preceding strand 13b (twisted front portion)” and “following strand 13c (twisted rear portion)” in the twisted portion 13A of the coil layer portion 13a, the flowing direction of the current I is opposite. A magnetic flux front surface 13f formed by gathering magnetic fluxes generated by the "preceding element wire 13b" and a magnetic flux rear surface 13g formed by collecting magnetic fluxes generated by the "following element wire 13c".

In this case, the magnetic flux front surface 13f and the magnetic flux rear surface 13g, which are generated when the current I flows in opposite directions, are not 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 surface, the generation of eddy currents 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. Transmission loss can be minimized by suppressing the decrease.

  The coil winding 12 includes a multi-core laminated portion 15 in which stranded wires (outer stranded wire 16, medium stranded wire 17, and inner stranded wire 18) are laminated in a plurality of layers, and each layer 15a of the multi-core laminated portion 15 includes: 15b and 15c constitute a stranded wire, and the diameter of the stranded wire of each layer is set so as to gradually increase from the inner layer to the outer layer. For this reason, close-packing of each layer is realized, and a high electrical capacity of the multi-core laminated portion 15 can be ensured.

Further, a compact coil layer structure is formed in which the coil layer portions 13a are in contact with each other in the longitudinal direction L or overlapped closely in the contact position H1. When the protrusion 13x is separated from the recess 13y, the coil layer portions 13a can be stretched in the first radial direction R by their own elastic energy and deformed at the extended position H2.
For this reason, even if it is a compact coil layer structure, it can be used for the electrical connection between terminals in a long-distance section by deforming and arranging the coil layer portions 13a at the extended position H2.

  FIG. 5 shows a second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that the communication line 21 enclosed in the rubber tube 20 is disposed in the space Sp of the multi-core laminated portion 15. Thereby, a communication function is added and the multi-core lamination | stacking part 15 can be versatile or multi-functionalized.

FIG. 6 shows a third embodiment of the present invention. Example 3 differs from Example 1 in that the number of outer stranded wires 16 in the outer layer 15a is the same as the number of intermediate stranded wires 17 in the intermediate layer 15b and the number of inner stranded wires 18 in the inner layer 15c.
The middle stranded wire 17 of the middle layer 15b is arranged in a state of circumscribing 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 wire (outer stranded wire 16, intermediate stranded wire 17, inner stranded wire 18) of each layer (outer layer 15a, intermediate layer 15b, inner layer 15c) is arranged in a circumscribed state along the circumferential direction Cs, and the stranded wire of each layer The number of arrangement is the same with no difference in the number.
For this reason, all of the radial directions of the medium stranded wire 17, the outer stranded wire 16, and the inner stranded wire 18 do not necessarily match along the second radial direction Rs of the multicore 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 an excellent high 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 portion 15 as in Example 2, but the communication line 21 is omitted and the space Sp is open. You can leave it.

Note that the invention of Example 3 shown in FIG. 6 corresponds to the invention described in Japanese Unexamined Patent Publication No. 2009-158331 (Japanese Patent No. 4673361) published in the “Background Art” column.
Since the patentee of the Japanese Patent No. 4673361 is Misu Electric Wire Co., Ltd., in carrying out the present invention, they have 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 between the fourth embodiment and the first embodiment is that conductive wires are 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 intermediate stranded wire 17, and the second conductive wire is interposed between the intermediate stranded wire 17 and the outer stranded wire 16. K2 is arranged in the circumscribed state, and the third conductive wire K3 is arranged in the circumscribed state between the covering layer 12A and the outer stranded wire 16.

In this case, the communication line 21 enclosed 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 Example 4, in addition to the outer stranded wire 16, the middle stranded wire 17, and the inner stranded wire 18, the first conductive wire to the third conductive wire (K1 to K3) can be densely packed densely.

[Modification]
(A) The power line structure for transmission is not limited to the in-wheel motor 3, but is connected to an electronic control unit (ECU) incorporating a computer and various vehicle sensors, as well as a drive monitor, vehicle navigation device, data processing It may be applied to general electrical components that can be connected to electronic circuits such as parts, security devices, or components around the vehicle body and wire harnesses.

(B) Instead of the attaching / detaching means, the projecting portion 13x and the recessed portion 13y may be held at the contact position H2 via an adhesive capable of peeling adjacent coil layer portions 13a. In this case, the adjacent coil layer portions 13a are released by peeling against the adhesive force of the adhesive, thereby extending the coated coil layer 13 to the extended position H1 by releasing the elastic energy storage 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. Imido, 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 plastic materials.

  In the power line structure for transmission according to the present invention, 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 transmission loss is minimized by suppressing the decrease in power transmission efficiency. . Demand from related businesses focusing on these usefulness is aroused and can 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 (detachment means)
DESCRIPTION OF SYMBOLS 15 Multi-core laminated part 15a Outer layer 15b Middle layer 15c Inner layer 16 Outer stranded wire 17 Middle stranded wire 18 Inner stranded wire H1 Extension position H2 Contact position L Longitudinal direction R 1st radial direction Rs 2nd radial direction Sp Space part

Claims (10)

A coil winding (12) formed by continuously winding the strands in a spiral coil shape, with the internal hollow shaft (12a) as the longitudinal direction (L);
A coated coil layer (13) made of an elastic resin that is provided in close contact with the outer surface of the coil winding (12), integrally encloses the coil winding (12), and has an elastic energy storage force against its deformation. )
Abutting positions (H1) at which the coil layer portions (13a) adjacent to each other of the coated coil layer (13) abut against the elastic accumulating force along the longitudinal direction (L). And the single-pitch coil layer portions (13a) are displaced and deformed in the first radial direction (R) perpendicular to the longitudinal direction (L) by the elastic energy, and the coil layer portions (13a) is configured to be elastically displaceable between the extended positions (H2) that extend along the first radial direction (R) and are separated from each other,
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 adjacent single pitch coil layer portions (13a) are contacted with each other. Attaching / detaching means (13x, 13y) for releasing from the contact position (H1) in contact and displacing to the extended position (H2),
At the extended position (H2), one (13A) of the portions twisted by the displacement displacement of the coil layer portion (13a) 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 concentric arrangement, and the transmission power line structure is characterized in that the diameter of the stranded wire of each of the layers (15a, 15b, 15c) is set 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 abutting position (H1) by detachable engagement between the protrusion (13x) and the recess (13y), and the recess (13y ) When the protrusions (13x) are disengaged from each other, the coil layer portions (13a) are released from the engagement, and are stretched in the first radial direction (R) by the elastic accumulating force of the coil layer portions (13x). The power line structure for transmission according to claim 1, wherein the power line structure is modified and arranged in (H2).   2. 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 stranded wires of the layers (15a, 15b, 15c) are arranged in a circumscribed state along the circumferential direction (Cs) of the multi-core laminated portion (15), and the radial directions of the stranded wires of the layers are 2. The power line structure for transmission according to claim 1, wherein the power line structure is adapted to be overlapped in a straight line along the second radial direction (Rs) of the multi-core laminated portion (15).   The twisted wires of the layers (15a, 15b, 15c) are arranged in a circumscribed state along the circumferential direction (Cs), and the number of the twisted wires of the layers (15a, 15b, 15c) is not different 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 laminate portion (15) is configured to form a hollow space portion (Sp) extending along the axial direction (Ax) of the multi-core laminate portion (15). The power line structure for transmission according to claim 1.   The power line structure for transmission according to claim 6, wherein a communication line (21) enclosed in a tube (20) is disposed in the space portion (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 power line structure for transmission according to claim 8, wherein the cross-sectional area is in a range of 15 to 25 square mm, 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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