Composite cable
The composite cable achieves improved flexibility and durability by optimizing strand diameter ratios and twisting directions in its power line conductor, addressing the cost versus flexibility challenge in vehicle cable connections.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PROTERIAL LTD
- Filing Date
- 2022-09-30
- Publication Date
- 2026-05-26
AI Technical Summary
Existing composite cables connecting vehicle wheels and bodies require high flexibility to accommodate vertical movements while maintaining cost-effectiveness, as reducing wire diameter to enhance flexibility increases manufacturing costs.
A composite cable design with power and signal lines featuring a power line conductor made by twisting multiple metal strands, where the central stranded wire has a smaller diameter than peripheral wires, and the number of strands in the central wire exceeds those in the periphery, with a specific diameter ratio and twisting direction to improve flexibility without significant cost increases.
The design enhances flexibility and bending durability while keeping manufacturing costs in check by optimizing strand diameter and twisting configurations, ensuring stable strand contact and reduced surface pressure.
Smart Images
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Abstract
Description
[Technical Field]
[0001] The present invention relates to a composite cable having multiple power lines and multiple signal lines. [Background technology]
[0002] Conventionally, the applicant has proposed a composite cable described in Patent Document 1, for example, as a composite cable for connecting the wheel side and the vehicle body side of a vehicle. This composite cable comprises a pair of twisted wires, each consisting of a pair of first wires, the first conductor of which is covered with a first insulator, twisted together; a pair of power wires, each consisting of a second conductor with a larger cross-sectional area than the first conductor, covered with a second insulator; and a sheath that covers the pair of twisted wires and the pair of power wires together. The first conductor is made by twisting together a plurality of metal strands, and the second conductor is made by twisting together a plurality of bundled twisted wires, each consisting of a plurality of metal strands. [Prior art documents] [Patent Documents]
[0003] [Patent Document 1] Japanese Patent Publication No. 2019-140006 [Overview of the Initiative] [Problems that the invention aims to solve]
[0004] As described above, the composite cable connecting the wheel and the vehicle body requires high flexibility to bend flexibly in accordance with the vertical movement of the wheel relative to the vehicle body. To improve flexibility, it is effective to reduce the diameter of the metal wire strands, but reducing the wire diameter increases manufacturing costs.
[0005] Therefore, the present invention aims to provide a composite cable that can improve flexibility while suppressing cost increases. [Means for solving the problem]
[0006] In order to achieve the above object, the present invention provides a composite cable having a plurality of power lines and a plurality of signal lines, wherein each of the plurality of power lines has a power line conductor and an insulator covering the outer periphery of the power line conductor, and the power line conductor is formed by twisting a plurality of collective twisted lines formed by twisting a plurality of metal strands. The plurality of stranded wires include one stranded wire located in the center of the power line conductor and six stranded wires surrounding the one stranded wire, and the one stranded wire The strand diameter of each of the plurality of metal strands of The six aforementioned is smaller than the strand diameter of each of the plurality of metal strands of the collective twisted line Ku , The number of metal strands in the single stranded wire is greater than the number of metal strands in the six stranded wires, and the outer diameter of the single stranded wire is 90% or more and 110% or less of the outer diameter of each of the six stranded wires. and provides a composite cable.
Advantages of the Invention
[0007] According to the composite cable of the present invention, it is possible to increase the flexibility while suppressing the increase in cost.
Brief Description of the Drawings
[0008] [Figure 1] (a) is an external view showing a vehicle to which a composite cable according to an embodiment of the present invention is attached. (b) is a configuration diagram showing a peripheral portion of one wheel. [Figure 2] It is an explanatory diagram for explaining the configuration of the composite cable. [Figure 3] It is a cross-sectional view of the composite cable taken along the line A-A in FIG. 2. [Figure 4] It is a cross-sectional view showing the central collective twisted line and the peripheral collective twisted line in the power line conductor at intervals. [Figure 5] (a) is a cross-sectional view showing a power line according to a first modification. (b) is a cross-sectional view showing a power line according to a second modification. [Figure 6] It is a cross-sectional view showing the configuration of the composite cable according to the modification.
Embodiments for Carrying Out the Invention
[0009] [Embodiment] (Configuration of Vehicle) Figure 1(a) is an external view showing a vehicle 1 to which a composite cable 2 according to an embodiment of the present invention is attached. Figure 1(b) is a configuration diagram showing the area around one of the multiple wheels 10 of the vehicle 1. The composite cable 2 has multiple power lines and multiple signal lines. In this embodiment, the case in which the composite cable 2 has two power lines and two signal lines is described, but the number of power lines and signal lines is not limited to this.
[0010] The wheel 10 is supported by a suspension system 12 so as to be movable in the vertical direction relative to the vehicle body 11. The suspension system 12 consists of an upper arm 121, a lower arm 122, a shock absorber 123, and a suspension spring 124. One end of the upper arm 121 and the lower arm 122 are connected to a knuckle 13, and the other end is connected to the vehicle body 11. The upper arm 121 is connected together with the shock absorber 123 to the upper mounting portion 131 of the knuckle 13, and the lower arm 122 is connected to the lower mounting portion 132 of the knuckle 13. The suspension spring 124 is arranged coaxially on the outer circumference of the shock absorber 123 and expands and contracts in accordance with the vertical movement of the vehicle body 11 relative to the road surface.
[0011] The knuckle 13 is fitted with a hub unit 14, an electric brake device 15, and a rotational speed sensor 16. Hereinafter, the part of the suspension spring 124 closer to the wheel 10 will be referred to as the "unsprung mass," and the part closer to the vehicle body 11 will be referred to as the "sprung mass." The unsprung mass includes the wheel 10, suspension device 12, knuckle 13, hub unit 14, electric brake device 15, and rotational speed sensor 16. The sprung mass includes the vehicle body 11 and the wheel well 111 fixed to the vehicle body 11 so as to surround the wheel 10.
[0012] The hub unit 14 has an outer ring 141 fixed to the knuckle 13 by a plurality of bolts 140, and a hub ring 142 rotatably supported relative to the outer ring 141. The hub ring 142 is provided with a wheel mounting flange 142a, and the wheel 10 and brake rotor 17 are attached to this wheel mounting flange 142a by a plurality of hub bolts 143. The electric brake device 15 generates frictional force by pressing brake pads 151 against the brake rotor 17, thereby braking the wheel 10. The rotational speed sensor 16 detects the magnetic field of a magnetic encoder fixed to the outer ring 141 and rotating integrally with the hub ring 142.
[0013] Vehicle 1 is equipped with a control device 100 that controls the electric brake device 15, and the control device 100 is electrically connected to the electric brake device 15 and the rotational speed sensor 16 by a composite cable 2. Alternatively, the composite cable 2 may be electrically connected to the control device 100 via a relay component such as a terminal block on the vehicle body side.
[0014] The composite cable 2 is fixed to the sprung mass and unsprung mass at multiple points by fasteners. Figure 1(b) shows the vehicle body bracket 18 and the wheel side bracket 19, which serve as fasteners. The vehicle body bracket 18 is attached to the wheel well 111. The wheel side bracket 19 is attached to the upper mounting portion 131 of the knuckle 13. The composite cable 2 is suspended in the air between the vehicle body bracket 18 and the wheel side bracket 19. In other words, both ends of the suspended portion of the composite cable 2 are fixed to the vehicle body side and the wheel side by the vehicle body bracket 18 and the wheel side bracket 19, respectively.
[0015] (Combined cable configuration) Figure 2 is an explanatory diagram illustrating the configuration of composite cable 2. Figure 3 is a cross-sectional view of composite cable 2 along line AA in Figure 2.
[0016] The composite cable 2 has first and second power lines 3A, 3B and first and second signal lines 4A, 4B. The first and second signal lines 4A, 4B are twisted together to form a paired stranded wire 40. In this embodiment, the paired stranded wire 40 is covered by an internal sheath 400, and the paired stranded wire 40 and the internal sheath 400 constitute the signal line cable 4. The internal sheath 400 is made of, for example, urethane resin. The first and second power lines 3A, 3B and the signal line cable 4 are twisted together to form a bundle 20.
[0017] Furthermore, the composite cable 2 has a tape member 5 spirally wrapped around the aggregate 20, and a sheath 6 covering the outer circumference of the tape member 5. The sheath 6 is made of, for example, urethane resin. As the tape member 5, it is desirable to use one that is slippery and has a low coefficient of friction with respect to the first and second power lines 3A, 3B and the signal line cable 4, for example, a strip made of nonwoven fabric, paper, or resin can be used. However, the tape member 5 may be omitted. In this case, when the composite cable 2 is bent, the first and second power lines 3A, 3B and the signal line cable 4 slide along the inner surface of the sheath 6. In order to facilitate this sliding, a lubricant such as talc may be placed between the first and second power lines 3A, 3B and the signal line cable 4 and the sheath 6.
[0018] An intervening material 7 is placed in the gap between the assembly 20 and the tape member 5. The intervening material 7 can be, for example, polypropylene yarn, rayon staple fiber, aramid fiber, or nylon fiber. However, it is not necessary to place the intervening material 7 between the assembly 20 and the tape member 5. Note that the intervening material 7 is not shown in Figure 2.
[0019] The first and second power lines 3A and 3B, and the first and second signal lines 4A and 4B, each have one end connected to the vehicle body and the other end connected to the wheel. In this embodiment, one end of the first and second power lines 3A and 3B is connected to the control device 100, and the other end of the first and second power lines 3A and 3B is connected to the electric brake device 15. In addition, one end of the first and second signal lines 4A and 4B is connected to the control device 100 and the other end is connected to the rotation speed sensor 16.
[0020] Furthermore, the connection targets for one end of each of the first and second power lines 3A, 3B and the first and second signal lines 4A, 4B are not limited to the control device 100, but may be any on-board device mounted on the vehicle body. Also, the connection targets for the other ends of the first and second power lines 3A, 3B are not limited to the electric brake device 15, but may be, for example, an electronically controlled shop absorber whose damping force can be adjusted by electronic control. Moreover, the connection targets for the other ends of the first and second signal lines 4A, 4B are not limited to the rotational speed sensor 16, but may be, for example, the electric brake device 15 or a wheel-side actuator such as the electronically controlled shop absorber mentioned above. In this case, the first and second signal lines 4A, 4B transmit control signals from the actuators. Also, the connection targets for the other ends of the first and second signal lines 4A, 4B may be sensors for detecting the state of the wheel 10, such as pneumatic sensors.
[0021] The first and second power lines 3A and 3B supply power from the control device 100 to the electric brake device 15 to operate the electric brake device 15. The first and second signal lines 4A and 4B send signals indicating the rotational speed of the wheel 10 from the rotational speed sensor 16 to the control device 100.
[0022] The first and second signal lines 4A and 4B each have a signal line conductor 41 and an insulator 42 that covers the outer circumference of the signal line conductor 41. The signal line conductor 41 is a stranded wire made by twisting together a plurality of metal strands 410. The metal strands 410 can preferably be made of copper or a copper alloy, for example. Alternatively, the surface of the metal strands 410 may be plated with tin, nickel, silver, zinc, or the like. The insulator 42 is made of an insulating resin, such as cross-linked polyethylene.
[0023] The first and second power lines 3A and 3B each have a power line conductor 30 and an insulator 300 covering the outer circumference of the power line conductor 30. The insulator 300 is made of an insulating resin such as cross-linked polyethylene. The conductor cross-sectional area of the power line conductor 30 is larger than the conductor cross-sectional area of the signal line conductor 41, and the wire diameter of the first and second power lines 3A and 3B is larger than the wire diameter of the first and second signal lines 4A and 4B.
[0024] The power line conductor 30 is composed of several (seven in this embodiment) stranded wires 31 to 37 twisted together. Of the multiple stranded wires 31 to 37, one stranded wire 31 is located in the center of the power line conductor 30, and the other stranded wires 32 to 37 are twisted spirally around the outer circumference of the one stranded wire 31. Hereinafter, the one stranded wire 31 located in the center of the power line conductor 30 will be referred to as the central stranded wire 31, and the other stranded wires 32 to 37 will be referred to as the peripheral stranded wires 32 to 37.
[0025] Figure 4 is a cross-sectional view showing the central stranded wire 31 and peripheral stranded wires 32-37 of the power line conductor 30, spaced apart from each other. The central stranded wire 31 is composed of multiple metal strands 310 twisted together. The peripheral stranded wires 32-37 are composed of multiple metal strands 320, 330, 340, 350, 360, and 370, respectively, twisted together. For example, copper or copper alloys can be suitably used as the metal strands 310, 320, 330, 340, 350, 360, and 370. The surfaces of the metal strands 310, 320, 330, 340, 350, 360, and 370 may be plated with tin, nickel, silver, zinc, or the like.
[0026] Each of the multiple metal strands 310 in the central bundled stranded wire 31 has a strand diameter D 10 This refers to the individual wire diameters D of the multiple metal strands 320, 330, 340, 350, 360, and 370 of the peripheral bundled strands 32-37. 20 It is smaller than. In this embodiment, this difference in wire diameter enhances flexibility while suppressing cost increases. In other words, generally, stranded wires made by twisting together multiple metal wires bend more flexibly and have higher flexibility the smaller the wire diameter, but manufacturing thin metal wires requires more processes, which increases costs. Therefore, in this embodiment, the wire diameter D of the single central bundled stranded wire 31 located in the center of the power line conductor 30, where the bending strain is greatest when bent, is 10 Only the strand diameter D of the other peripheral stranded wires 32-37 20 By making it smaller, the cost increase is significantly suppressed compared to the case where the diameter of all strands 31-37 constituting the power line conductor 30 is reduced.
[0027] Here, the peripheral stranded wires 32-37 are wound spirally around the central stranded wire 31, and the length of the peripheral stranded wires 32-37 per unit length of the first and second power lines 3A and 3B is longer than the length of the central stranded wire 31. Therefore, if all the strands of the stranded wires 31-37 have the same diameter, when the first and second power lines 3A and 3B are bent, the peripheral stranded wires 32-37 have a greater margin of safety against bending stress compared to the central stranded wire 31. For this reason, in this embodiment, the strand diameter D of the central stranded wire 31 is 10 Only the strand diameter D of the other peripheral stranded wires 32-37 20 It is smaller than before, improving flexibility and bending durability while keeping cost increases to a minimum.
[0028] The wire diameter D of the metal strands 310 of the central bundled stranded wire 31 10 This refers to the wire diameter D of each metal strand 320, 330, 340, 350, 360, 370 of the peripheral bundled strands 32-37. 20 It is desirable that it be 80% or less. Strand diameter D of the central bundled stranded wire 3110 is set to 80% or less of the wire diameter D of the strands of the peripheral set twisted wires 32 to 37 20 , the bending strains of the central set twisted wire 31 and the peripheral set twisted wires 32 to 37 when bent are balanced, and the wire diameter D of the strands of the central set twisted wire 31 10 is the wire diameter D of the strands of the peripheral set twisted wires 32 to 37 20 and a higher improvement effect in flexibility and bending durability can be obtained as compared with the case where they are the same.
[0029] Further, the wire diameter D of the metal strands 310 of the central set twisted wire 31 10 is desirably 50% or more of the wire diameter D of each of the metal strands 320, 330, 340, 350, 360, 370 of the peripheral set twisted wires 32 to 37 20 . If this ratio is less than 50%, it is difficult to obtain the improvement effect in the flexibility and bending durability of the first and second power supply lines 3A and 3B corresponding to the cost increase due to the reduction in the wire diameter of the metal strands 310 of the central set twisted wire 31.
[0030] Thus, the wire diameter D of the metal strands 310 of the central set twisted wire 31 10 is desirably 50% or more and 80% or less of the wire diameter D of each of the metal strands 320, 330, 340, 350, 360, 370 of the peripheral set twisted wires 32 to 37. 20
[0031] The twist pitch of the metal strands 310 in the central stranded wire 31 is the same as, or smaller than, the twist pitch of the metal strands 320, 330, 340, 350, 360, and 370 in the peripheral stranded wires 32 to 37. As an example, it is desirable that the twist pitch of the metal strands 310 in the central stranded wire 31 is 50% or more of the twist pitch of the metal strands 320, 330, 340, 350, 360, and 370 in the peripheral stranded wires 32 to 37. Here, the twist pitch of the metal strands 310 in the central stranded wire 31 refers to the distance in the longitudinal direction of the central stranded wire 31 from among multiple metal strands 310 to the point where any two metal strands 310 on the outer circumference of the central stranded wire 31 are at the same position in the circumferential direction of the central stranded wire 31. The same applies to the twist pitches of the individual metal strands 320, 330, 340, 350, 360, and 370 of the peripheral bundled strands 32-37.
[0032] Furthermore, in this embodiment, the number of metal strands 310 in the central stranded wire 31 is greater than the number of metal strands 320, 330, 340, 350, 360, and 370 in the peripheral stranded wires 32 to 37, and the outer diameter D1 of the central stranded wire 31 is equivalent to the outer diameter D2 of the peripheral stranded wires 32 to 37. More specifically, the outer diameter D1 of the central stranded wire 31 is 90% to 110% of the outer diameter D2 of the peripheral stranded wires 32 to 37. As a result, there are no large gaps between the central stranded wire 31 and the peripheral stranded wires 32 to 37, or between the peripheral stranded wires 32 to 37 themselves, and the relative positions of the central stranded wire 31 and the peripheral stranded wires 32 to 37 are stable.
[0033] In Figure 4, the twisting direction (sub-twisting direction) of the metal strands 310 in the central bundled strand 31, and the twisting direction (sub-twisting direction) of the respective metal strands 320, 330, 340, 350, 360, 370 in the peripheral bundled strands 32-37 are indicated by arrow A. 30This is shown. In Figure 3, the twisting direction (main twisting direction) of the central stranded wire 31 and the peripheral stranded wires 32-37 in the first and second power lines 3A and 3B is indicated by arrow A3. Also in Figure 3, the twisting direction of the multiple metal strands 410 in the first and second signal lines 4A and 4B is indicated by arrow A 40 The twisting direction of the first and second signal lines 4A and 4B in the twisted pair 40 is indicated by arrow A4. Furthermore, in Figures 3 and 2, the twisting direction of the first and second power lines 3A and 3B and the signal line cable 4 in the assembly 20 is indicated by arrow A 20 The winding direction of the tape member 5 on the outer circumference of the assembly 20 is indicated by arrow A5.
[0034] Here, the twisting direction refers to the rotational direction of the first and second power lines 3A, 3B, metal strands 310, 320, 330, 340, 350, 360, 370, signal cable 4, first and second signal lines 4A, 4B, and metal strand 410, when the composite cable 2 is viewed from one axial side (for example, the left side in Figure 2) along its central axis. The same applies to the winding direction of the tape member 5. In the illustrated examples in Figures 2 to 4, arrow A 30 ,A3,A 40 A4, A 20 The twisting directions indicated by the arrows, and the winding direction of the tape member 5 indicated by arrow A5, are all counterclockwise.
[0035] By having the same twisting direction, the bending durability of the first and second power lines 3A and 3B is improved in particular. In other words, if the twisting direction (sub-twisting direction) of the metal strands 310, 320, 330, 340, 350, 360, 370 and the twisting direction (main twisting direction) of the central bundled strand 31 and the peripheral bundled strands 32-37 in the first and second power lines 3A and 3B were reversed, then when the first and second power lines 3A and 3B were bent, the metal strands 310 of the central bundled strand 31 and the metal strands 310, 320, 330 of the peripheral bundled strands 32-37 would be reversed. At the points where strands 340, 350, 360, and 370 intersect and come into contact with each other, the surface pressure becomes high, making the surface of the strands more susceptible to damage. However, in this embodiment, since the twisting directions of these strands are the same, the metal strands 310 of the central bundled strand 31 and the metal strands 310, 320, 330, 340, 350, 360, and 370 of the peripheral bundled strands 32 to 37 are more likely to come into line contact, and the reduction in surface pressure makes it less likely for the surface of the strands to be damaged.
[0036] Furthermore, by making each twist direction the same as described above, when the composite cable 2 is twisted in the same direction as the twist direction around the central axis of the composite cable 2, the metal strands 310 of the central bundled strand 31 and the metal strands 310, 320, 330, 340, 350, 360, 370 of the peripheral bundled strands 32-37 are pressed together strongly, which may reduce the torsional durability. However, in this embodiment, as shown in Figure 1, both ends of the portion of the composite cable 2 that is suspended in the air are fixed by the bracket 18 on the vehicle body side and the bracket 19 on the wheel side, respectively, so such twisting does not occur.
[0037] Furthermore, as described above, making each twist direction the same may cause the composite cable 2 to develop a tendency to bend. However, in this embodiment, by adjusting the fixing position and direction of the bracket 18 on the vehicle body side and the bracket 19 on the wheel side, taking this tendency to bend into consideration, it is possible to prevent the portion of the composite cable 2 that is suspended in the air from coming into contact with the vehicle's components.
[0038] (Effects of the embodiment) As described above, according to this embodiment, the wire diameter D of each of the multiple metal strands 310 of the central bundled stranded wire 31 10 The diameter D of each individual metal strand 320, 330, 340, 350, 360, 370 of the peripheral bundled strand 32-37. 20 By being smaller, it becomes possible to improve flexibility while keeping cost increases in check.
[0039] [Power line modification] Figure 5(a) is a cross-sectional view showing the power supply line 8 according to the first modified example. Figure 5(b) is a cross-sectional view showing the power supply line 9 according to the second modified example. In the above embodiment, the case in which the first and second power supply lines 3A and 3B consist of 7 stranded wires was described, but in these modified examples, the power supply lines 8 and 9 consist of 19 stranded wires.
[0040] The power supply line 8 shown in Figure 5(a) comprises a power supply line conductor 80 and an insulator 800 covering the outer circumference of the power supply line conductor 80. The power supply line conductor 80 is composed of seven central stranded wires 81 and twelve peripheral stranded wires 82 surrounding them, which are twisted together. The central stranded wires 81 are made up of multiple metal strands 810 twisted together, and the peripheral stranded wires 82 are made up of multiple metal strands 820 twisted together. The wire diameter of the metal strands 810 in the central stranded wires 81 is smaller than the wire diameter of the metal strands 820 in the peripheral stranded wires 82. The wire diameter of the metal strands 810 in the central stranded wires 81 is 50% to 80% of the wire diameter of the metal strands 820 in the peripheral stranded wires 82.
[0041] The power supply line 9 shown in Figure 5(b) comprises a power supply line conductor 90 and an insulator 900 covering the outer circumference of the power supply line conductor 90. The power supply line conductor 90 is composed of a single central stranded wire 91 and 18 peripheral stranded wires 92 that double-wrap around it. The central stranded wire 91 is made up of multiple metal strands 910 twisted together, and the peripheral stranded wires 92 are made up of multiple metal strands 920 twisted together. The wire diameter of the metal strands 910 in the central stranded wire 91 is smaller than the wire diameter of the metal strands 920 in the peripheral stranded wires 92. The wire diameter of the metal strands 910 in the central stranded wire 91 is 50% to 80% of the wire diameter of the metal strands 920 in the peripheral stranded wires 92.
[0042] The materials of the metal strands 810, 820, 910, 920 and the insulators 800, 900 of the power lines 8 and 9 are the same as in the above embodiment. Furthermore, the twisting direction (sub-twisting direction) of the metal strands 810 in the central stranded bundle 81 of the power line 8, the twisting direction (sub-twisting direction) of the metal strands 820 in the peripheral stranded bundle 82, and the twisting direction (main twisting direction) of the multiple central stranded bundles 81 and multiple peripheral stranded bundles 82 in the power line conductor 80 are the same. Similarly, the twisting direction (sub-twisting direction) of the metal strands 910 in the central stranded bundle 91 of the power line 9, the twisting direction (sub-twisting direction) of the metal strands 920 in the peripheral stranded bundle 92, and the twisting direction (main twisting direction) of the multiple central stranded bundles 91 and multiple peripheral stranded bundles 92 in the power line conductor 90 are the same.
[0043] A composite cable constructed using multiple power lines 8 and 9 according to these modified examples can improve flexibility while suppressing cost increases, similar to the embodiments described above. In other words, if the diameter of each of the multiple metal strands in at least one stranded wire located in the center of the power line conductors is smaller than the diameter of each of the multiple metal strands in the other stranded wires, it is possible to improve flexibility while suppressing cost increases.
[0044] [Example of composite cable configuration] Figure 6 is a cross-sectional view showing the configuration of a modified composite cable 2A. In the above embodiment, a twisted pair of wires 40, formed by twisting together the first and second signal lines 4A and 4B, is covered by an internal sheath 400, and the twisted pair of wires 40 and the internal sheath 400 constitute the signal line cable 4. However, in the modified example shown in Figure 6, the twisted pair of wires 40 is not covered by the internal sheath 400, and the twisted pair of wires 40 is twisted together with the first and second power lines 3A and 3B to form an assembly 20A. Furthermore, there is no intervening 7 between the assembly 20A and the tape member 5. The other components are the same as in the above embodiment, so the same reference numerals as in Figure 2 are used, and redundant explanations are omitted.
[0045] This modified composite cable 2A also makes it possible to improve flexibility while suppressing cost increases, similar to the embodiment described above.
[0046] (Summary of the embodiments) Next, the technical concept understood from the embodiments and modified examples described above will be described using the reference numerals and other symbols from the embodiments and modified examples. However, the reference numerals in the following description are not limited to the components in the claims that are specifically shown in the embodiments.
[0047] [1] A composite cable (2, 2A) having multiple power lines (3A, 3B, 8, 9) and multiple signal lines (4A, 4B), wherein each of the multiple power lines (3A, 3B, 8, 9) has a power line conductor (30, 80, 90) and an insulator (300, 800, 900) covering the outer circumference of the power line conductor (30, 80, 90), and the power line conductor (30, 80, 90) has multiple metal strands (310, 320, 330, 340, 3 It is constructed by twisting together multiple bundled strands (31-37, 81, 82, 91, 920) which are made by twisting together 50, 360, 370, 810, 820, 910, 920), and each strand diameter (D) of the multiple metal strands (310, 810, 910) of at least one bundled strand (31, 81, 91) located in the center of the power line conductor (30, 80, 90) among the multiple bundled strands (31-37, 81, 82, 91, 92) 10 ) refers to the individual wire diameters (D) of the multiple metal strands (320, 330, 340, 350, 360, 370, 820, 920) of the other strands (32~37, 82, 92) surrounding at least one strand (31, 81, 91) among the multiple strands (31~37, 81, 82, 91, 92) 20 A composite cable (2,2A) that is smaller than ).
[0048] [2] The wire diameter (D) of the plurality of metal strands (310, 810, 910) of the at least one bundled stranded wire (31, 81, 91) 10 ) the wire diameter (D) of the multiple metal strands (320, 330, 340, 350, 360, 370, 820, 920) of the other bundled strands (32~37, 82, 92) 20 The composite cable (2,2A) described above [1] is less than 80% of the above.
[0049] [3] The wire diameter (D) of the plurality of metal strands (310, 810, 910) of the at least one bundled stranded wire (31, 81, 91) 10 ) the wire diameter (D) of the multiple metal strands (320, 330, 340, 350, 360, 370, 820, 920) of the other bundled strands (32~37, 82, 92) 20A composite cable (2,2A) as described above [2], which is 50% or more of the above.
[0050] [4] The power line conductor (30) is made up of seven stranded wires (31-37) twisted together, and the strand diameter (D) of the multiple metal strands (310) of one stranded wire (31) located in the center of the power line conductor (30) 10 ) the wire diameter (D 20 A composite cable (2) as described in [1] above, smaller than ).
[0051] [5] The composite cable (2,2A) described in [1] above, wherein the power line conductors (30,80,90) have the same twisting direction as the plurality of metal strands (310,320,330,340,350,360,370,810,820,910,920) and the plurality of bundled strands (31~37,81,82,91,92).
[0052] [6] The composite cable as described in [1] above, wherein the plurality of signal lines (4A, 4B) are twisted together to form a paired wire (40), and the plurality of power lines (3A, 3B, 8, 9) and the paired wire (40) are twisted together.
[0053] [7] The composite cable (2,2A) described in [6] above, wherein the twisting direction of the plurality of power lines (3A,3B,8,9) and the paired wire (40), the twisting direction of the plurality of metal strands (310,320,330,340,350,360,370,810,820,910,920), and the twisting direction of the plurality of bundled strands (31~37,81,82,91,92) are the same.
[0054] [8] The composite cable (2, 2A) described in [1] to [7] above, wherein one end of each of the multiple power lines (3A, 3B, 8, 9) and the multiple signal lines (4A, 4B) is connected to the vehicle body (11) and the other end of each is connected to the vehicle's wheel side (10).
[0055] While embodiments and modifications of the present invention have been described above, the embodiments and modifications described above do not limit the invention as defined in the claims. Furthermore, it should be noted that not all combinations of features described in the embodiments are necessarily essential for solving the problem of the invention. [Explanation of symbols]
[0056] 1…Vehicle 10...Wheel 11... Vehicle body 2.2A…Composite cable 30... Power line conductor 300, 800, 900… insulator 31~37…Collected stranded wire 310, 320, 330, 340, 350, 360, 370… Metal wire strands 3A, 3B... First and second power lines 40... Stranded wire 410… Metal wire 42...Insulator 4A, 4B... Second signal line 8,9…Power line 80, 90… Power line conductors 81,91…Center group stranded wire 810, 820, 910, 920… Metal wire 82, 92… Peripheral bundled strands D 10 ,D 20 ...wire diameter
Claims
1. A composite cable having multiple power lines and multiple signal lines, Each of the aforementioned plurality of power lines has a power line conductor and an insulator covering the outer circumference of the power line conductor. The aforementioned power line conductor is constructed by twisting together multiple stranded wires, each made by twisting together multiple metal strands. The aforementioned plurality of stranded wires each comprises one stranded wire located in the center of the power line conductor and six stranded wires surrounding the one stranded wire. The diameter of each of the multiple metal strands in the aforementioned single stranded wire is smaller than the diameter of each of the multiple metal strands in the aforementioned six stranded wires. The number of metal strands in the single stranded wire is greater than the number of metal strands in the six stranded wires. The outer diameter of the single stranded wire is 90% to 110% of the outer diameter of each of the six stranded wires. Composite cable.
2. The diameter of the multiple metal strands in the single stranded wire is 80% or less of the diameter of the multiple metal strands in the six stranded wires. The composite cable according to claim 1.
3. The diameter of the multiple metal strands in the aforementioned single stranded wire is 50% or more of the diameter of the multiple metal strands in the aforementioned six stranded wires. The composite cable according to claim 2.
4. The plurality of signal lines are covered by an internal sheath, and the plurality of signal lines and the internal sheath constitute a signal cable. The aforementioned multiple power lines and the aforementioned signal line cable are twisted together. The composite cable according to claim 1.
5. The power line conductor has the same twisting direction as the plurality of metal strands, The composite cable according to claim 1.
6. The aforementioned multiple signal lines are twisted together to form a paired wire. The aforementioned multiple power lines and the aforementioned twisted-pair wires are twisted together. The composite cable according to claim 1.
7. The twisting direction of the plurality of power lines and the paired wires, the twisting direction of the plurality of metal strands, and the twisting direction of the plurality of bundled strands are the same. The composite cable according to claim 6.
8. The aforementioned multiple power lines and multiple signal lines each have one end connected to the vehicle body and the other end connected to the vehicle's wheels. A composite cable according to any one of claims 1 to 7.