JP2016122655A - Composite cable for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite cable for vehicle with improved flexural durability.SOLUTION: A composite cable 2 for vehicle connects a motor-driven braking device 1 fixed to the wheel 900 side of a vehicle 9 via a suspension 90, and a controller 99 disposed at a vehicle body 9 side. The composite cable 2 comprises: the first and second electric wires 3, 4 composed of insulation-coated core conductors 31, 41; a sheath 5 covering in block, the first and second electric wires 3, 4; and a lubricant 6 which is included between the first and second wires 3, 4 and the sheath 5 to reduce the frictional resistance between the wires 3, 4 and the sheath 5. The core conductors 31, 41 are the twisted wires prepared by twisting plural strands 300, 400, and the strand diameter of plural strands 300, 400 is 0.05 mm or more but 0.12 mm or less.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a composite cable for a vehicle that connects between a wheel side device fixed to a wheel side via a suspension device with respect to a vehicle body and a vehicle body side device arranged on the vehicle body side.

  Conventionally, a cable in which a plurality of electric wires are collectively accommodated in a sheath is known as a cable for connecting between a wheel side device fixed on the wheel side and a vehicle body side device arranged on the vehicle body side (for example, , See Patent Document 1).

  The cable (harness) described in Patent Document 1 has one end connected to an electric brake device provided on the wheel side and the other end connected to a battery mounted on the vehicle body side. The electric brake device receives supply of electric power from a battery via a cable, drives a motor by the electric power, and exerts a braking force by pressing a brake pad against a brake disk.

Japanese Patent Laying-Open No. 2008-238987 (FIG. 9)

  Such a cable for a vehicle is required to have high bending durability that bends following the movement of a wheel as the vehicle travels and can withstand long-term use. Patent Document 1 does not mention improvement of bending durability, and it is considered that there is still room for improvement.

  Then, an object of this invention is to provide the composite cable for vehicles which improved bending durability.

  In order to solve the above-described problems, the present invention provides a vehicle composite cable that connects a wheel-side device fixed to a wheel side and a vehicle-side device arranged on the vehicle body side, An assembly formed by bundling a plurality of electric wires formed by insulatingly covering the central conductor of the first core conductor with an insulator made of crosslinked polyethylene and a plurality of signal lines formed by insulatingly covering the second central conductor with an insulator; A sheath made of thermoplastic polyurethane covering the aggregate, and the first central conductor is a stranded wire formed by twisting a plurality of strands having a strand diameter of 0.05 mm or more and 0.12 mm or less. Yes, the outer diameter of the plurality of electric wires is larger than the outer diameter of the plurality of signal wires, and the signal wires are arranged in the valleys between two of the plurality of electric wires, and the plurality of electric wires Between the sheaths, the plurality of signal lines and the sheath And between the two electric wires and the signal line in the valley, between the plurality of electric wires and the sheath, between the plurality of signal lines and the sheath, and in the valley Provided is a vehicle composite cable further comprising a lubricant made of powder that reduces frictional resistance between two electric wires and the signal line.

  The vehicle composite cable according to the present invention can improve the bending durability.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows typically the electric brake device with which the composite cable for vehicles which concerns on the 1st Embodiment of this invention was mounted | worn, and its periphery part. It is the schematic which shows the structural example of an electric brake device. The composite cable is shown, (a) is a perspective view of the composite cable with a part of the sheath removed, (b) is an enlarged view of the end of the first electric wire, and (c) is the end of the second electric wire. FIG. It is an AA line sectional view of Drawing 3 (a). It is sectional drawing which shows the composite cable which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the composite cable which concerns on the modification of the 2nd Embodiment of this invention.

[First Embodiment]
FIG. 1 is a schematic configuration diagram schematically showing an electric brake device to which a composite cable according to the present embodiment is attached, and a peripheral portion thereof.

  The electric brake device 1 as a wheel side device is fixed to the vehicle body 9 via a suspension device 90 on the wheel 900 side. The suspension device 90 includes an upper arm 91, a lower arm 92, a shock absorber 93, and a suspension spring 94. The upper arm 91 and the lower arm 92 are connected to a knuckle 95 as a wheel support member via a bearing. The upper arm 91 is coupled to the first mounting portion 951 of the knuckle 95 together with the shock absorber 93. The lower arm 92 is connected to the second attachment portion 952 of the knuckle 95. The suspension spring 94 is coaxially disposed on the outer periphery of the shock absorber 93.

  A hub outer ring 961 of the hub unit 96 is fixed to the knuckle 95. A hub wheel 962 having a wheel mounting flange 962a is disposed inside the hub outer ring 961. Between the inner peripheral surface of the hub outer ring 961 and the outer peripheral surface of the hub ring 962, a plurality of unillustrated rolling elements are held by a cage, and the hub ring 962 can be rotated with respect to the hub outer ring 961. Yes.

  A disc-shaped brake rotor 97 is fixed to the wheel mounting flange 962 a of the hub wheel 962 together with the wheel 901 of the wheel 900. The brake rotor 97 integrally includes a friction portion 971 that frictionally slides with brake pads 1a and 1b, which will be described later, and a fixing portion 972 that is fixed to the wheel mounting flange 962a of the hub wheel 962, and the friction portion 971 is a fixing portion. 972 is provided on the outer peripheral side. A tire 902 is attached to the wheel 901.

  The knuckle 95 is provided with a third attachment portion 953, and the electric brake device 1 is fixed to the third attachment portion 953. The electric brake device 1 includes a main body portion 10 and a caliper 100, and presses the pair of brake pads 1a and 1b against the friction portion 971 of the brake rotor 97 to generate a friction force that serves as a braking force of the vehicle during traveling. The electric brake device 1 includes a parking brake mechanism (described later) for maintaining the frictional force between the friction portion 971 of the brake rotor 97 and the pair of brake pads 1a and 1b during parking. The electric brake device 1 is connected to one end of a composite cable 2 that supplies a current for operating the parking brake mechanism.

  With the above configuration, when the tire 902 is pushed up from the road surface or the vehicle body 9 is tilted by turning or acceleration / deceleration, the wheel 900 swings with respect to the vehicle body 9. The electric brake device 1 swings with the wheel 900, and the composite cable 2 is bent by the swing of the electric brake device 1.

(Configuration of electric brake device 1)
FIG. 2 is a schematic diagram illustrating a configuration example of the electric brake device 1. The electric brake device 1 converts the torque of the electric motor 11, the reduction mechanism 12 that decelerates the output of the electric motor 11, and the torque of the electric motor 11 decelerated by the reduction mechanism 12 into linear motion, and the brake pads 1 a and 1 b The main body 10 includes a thrust generation mechanism 13 that generates a thrust to be pressed against the friction portion 971 of the brake rotor 97 and a parking brake mechanism 14.

  The electric motor 11 is made of, for example, a DC motor, and is supplied with a motor current via a wiring not shown. The speed reduction mechanism 12 includes, for example, a planetary gear type speed reduction mechanism. The thrust generating mechanism 13 generates a thrust in the axial direction by rolling the ball in a ball groove inclined with respect to the circumferential direction, for example, and separates the first and second output members 131 and 132 from each other. It consists of a mechanism. The first output member 131 is disposed to face the brake pad 1a on the inner side (the vehicle body 9 side), and the second output member 132 is disposed on the opposite side.

  The caliper 100 includes a claw portion 101 facing the brake pad 1b on the outer side (wheel 901 side), a flange portion 102 provided so as to sandwich the thrust generation mechanism 13 between the claw portion 101, a claw portion 101, and a flange. The arm portion 103 that connects the portion 102 is integrally provided. Between the flange portion 102 and the second output member 132 of the thrust generation mechanism 13, an axial force sensor 15 that measures the thrust of the thrust generation mechanism 13 is disposed. The axial force sensor 15 outputs an electrical signal having a strength corresponding to the thrust of the thrust generating mechanism 13.

  The parking brake mechanism 14 is disposed so as to be movable in the axial direction with respect to the first engagement member 141 coupled to the shaft 110 of the electric motor 11 and not rotatable with respect to the main body 10. The second engagement member 142, the solenoid mechanism 143 that moves the second engagement member 142 in the axial direction toward the first engagement member 141, and the direction in which the second engagement member 142 is separated from the first engagement member 141. And a coil spring 144 for urging.

  A plurality of engagement protrusions 141 a are formed on the first engagement member 141 along the circumferential direction. The plurality of engaging protrusions 141a have a triangular shape having an acute angle when viewed from the radial direction, and two inclined surfaces approaching each other from the base portion toward the top portion are inclined in the same circumferential direction. The second engagement member 142 is formed with a plurality of engagement protrusions 142 a that engage with the plurality of engagement protrusions 141 a of the first engagement member 141. The plurality of engagement protrusions 142a, like the plurality of engagement protrusions 141a of the first engagement member 141, have a triangular shape with an acute angle when viewed from the radial direction, and approach each other as they go from the base to the top. The two slopes are inclined in the same circumferential direction.

  The inclined direction of the inclined surfaces of the plurality of engaging protrusions 141a of the first engaging member 141 and the inclined direction of the inclined surfaces of the plurality of engaging protrusions 142a of the second engaging member 142 are opposite to each other. Accordingly, when the plurality of engagement protrusions 141a of the first engagement member 141 and the plurality of engagement protrusions 142a of the second engagement member 142 are engaged, the shaft 110 of the electric motor 11 is engaged with both engagement protrusions 142a and 142a. These engagements are configured not to be released unless they are rotated in the direction of releasing the engagements.

  The solenoid mechanism 143 includes an annular electromagnetic coil 143a. When the electromagnetic coil 143a is energized, the second engagement member 142 moves toward the first engagement member 141, and a plurality of first engagement members 141 are provided. The engaging protrusions 141a and the plurality of engaging protrusions 142a of the second engaging member 142 are engaged with each other. A current is supplied to the electromagnetic coil 143a from a controller 99 (shown in FIG. 1) provided in the vehicle body 9 via first and second electric wires 3 and 4 (described later) of the composite cable 2. The composite cable 2 has one end led out from a routing path 981 having a lead-out port 98a in the wheel housing 98 (shown in FIG. 1) connected to the electric brake device 1 and the other end connected to the controller 99. Yes. A connector 20 (shown in FIG. 1) is provided at one end of the composite cable 2, and this connector 20 is fitted to the device-side connector 16 of the electric brake device 1. The controller 99 is an example of a vehicle body side device arranged on the vehicle body 9 side.

  When the electric brake device 1 configured as described above is energized to the electromagnetic coil 143a in a state where the brake pads 1a and 1b are pressed against the friction part 971 of the brake rotor 97 by the torque of the electric motor 11, the first engagement is performed. The member 141 and the second engagement member 142 are engaged. The engagement of the first engagement member 141 and the second engagement member 142 supplies the motor current to the electric motor 11 in a state where the energization to the electromagnetic coil 143a is interrupted, and the brake pad 1a, 1b is connected to the shaft 110. The rotation can be released by rotating the brake rotor 97 in the pressing direction. When the engagement of the first engagement member 141 and the second engagement member 142 is released, the second engagement member 142 is separated from the first engagement member 141 by the restoring force of the coil spring 144.

(Configuration of composite cable 2)
FIG. 3 shows the composite cable 2, (a) is a perspective view showing a part of the sheath 5 of the composite cable 2 removed, (b) is an enlarged view of the end of the first electric wire 3, and (c) is 3 is an enlarged view of an end portion of a second electric wire 4. FIG. FIG. 4 is a cross-sectional view taken along line AA in FIG.

  The composite cable 2 includes a first and second electric wires 3 and 4, a sheath 5 that collectively covers the first and second electric wires 3 and 4, and the first and second electric wires 3 and 4 and the sheath 5. And a lubricant 6 interposed therebetween. In the present embodiment, as shown in FIG. 3A, the lubricant 6 is also interposed between the first electric wire 3 and the second electric wire 4.

  The first electric wire 3 is an insulated wire obtained by insulatingly covering the central conductor 31 with an insulator 32. The second electric wire 4 is an insulated wire formed by insulatingly covering the central conductor 41 with an insulator 42. The first electric wire 3 and the second electric wire 4 are twisted together inside the sheath 5.

  The sheath 5 is made of a flexible resin such as polyurethane. As shown in FIG. 4, the sheath 5 is formed with an internal space 50 that accommodates the first electric wire 3 and the second electric wire 4. The outer peripheral surface 5 a of the sheath 5 is circular in a cross section orthogonal to the longitudinal direction of the composite cable 2. The hardness of the sheath 5 is preferably in the range of 80 degrees to 95 degrees as the JISA hardness. In the present embodiment, the JISA hardness of the sheath 5 is 90 degrees.

The lubricant 6 is for improving the lubricity of the first and second electric wires 3 and 4 in the inner space 50 of the sheath 5. The lubricant 6 is interposed between the inner surface 50a in the inner space 50 of the sheath 5 and the outer peripheral surfaces 3a and 4a of the first electric wire 3 and the second electric wire 4, and the first electric wire 3 and the second electric wire. The frictional resistance between 4 and the sheath 5 is reduced. In the present embodiment, the lubricant 6 is made of powder having a particle size of 5 μm or more and 50 μm or less. As a material for the powder, talc (Mg ₃ Si ₄ O ₁₀ (OH) ₂ ), silica (SiO ₂ ), or the like can be preferably used. Here, the particle size is a particle size determined by a screening method, a microscopic method, a laser diffraction scattering method, an electric detection method, a chromatography method, or the like specified in JIS8801.

  As shown in FIG. 3 (b), the center conductor 31 of the first electric wire 3 is a stranded wire formed by twisting a plurality of strands 300. More specifically, the center conductor 31 is a double stranded wire formed by parent-twisting a plurality of child twisted conductors 30 formed by twisting the plurality of strands 300 together. The strand 300 is made of a highly conductive metal such as copper or a copper alloy, and the strand diameter is 0.05 mm or more and 0.12 mm or less. More preferably, it is 0.07 mm or more and 0.09 mm or less. If the strand diameter is less than 0.05 mm, the strength of the strand itself is lowered, and it is considered that the strand break is likely to occur when the composite cable 2 is repeatedly bent or oscillated. Further, if the strand diameter exceeds 0.12 mm, the flexibility of the composite cable 2 is lowered, and it is considered that the strand breakage of the strand is likely to occur when the composite cable 2 is repeatedly bent or oscillated.

  The child twisted conductor 30 is formed by twisting, for example, 50 to 100 strands 300. The central conductor 31 is formed by twisting, for example, 7 or more and 19 or less child twisted conductors 30 together.

  The second electric wire 4 is configured in the same manner as the first electric wire 3. As shown in FIG. 3 (c), the second electric wire 4 is a double stranded wire formed by twisting a child stranded wire 40 obtained by twisting a plurality of strands 400, and the strand diameter of the strand 400 The material is the same as that of the strand 300 of the first electric wire 3. Further, the number of the strands 400 twisted as the child twisted conductor 40 and the number of the child twisted conductors 40 twisted as the central conductor 41 are the same as those of the first electric wire 3.

  The twist direction of the strands 300 and 400 in the child twisted conductors 30 and 40 and the twist direction of the child twisted conductors 30 and 40 in the center conductors 31 and 41 are the same direction. For example, in FIG. 3, when viewed from the center side (right side in FIG. 3) to the end side (left side in FIG. 3) in the longitudinal direction of the composite cable 2, the plurality of strands 300, 400 are counterclockwise. The twisted conductors 30 and 40 are twisted together, and the plurality of twisted conductors 30 and 40 are twisted in the same counterclockwise direction to constitute the center conductors 31 and 41.

  Further, the twisting direction of the first electric wire 3 and the second electric wire 4 is the twisting direction of the strands 300 and 400 in the child twisted conductors 30 and 40 and the twisted conductors 30 and 40 in the center conductors 31 and 41. This is opposite to the twisting direction. That is, when viewed from the center side in the longitudinal direction of the composite cable 2 toward the end side, the first electric wire 3 and the second electric wire 4 are twisted in the clockwise direction.

(Operation and effect of the embodiment)
According to the embodiment described above, the following operations and effects can be obtained.

(1) The central conductors 31 and 41 of the first and second electric wires 3 and 4 are stranded wires obtained by twisting a plurality of strands 300 and 400 having a strand diameter of 0.05 mm or more and 0.12 mm or less. Since the lubricant 6 is interposed between the first and second electric wires 3, 4 and the sheath 5, the flexibility of the composite cable 2 is enhanced while ensuring the strength of the strands 300, 400, and By reducing the frictional resistance between the second electric wires 3 and 4 and the sheath 5, the force received by the first and second electric wires 3 and 4 from the inner surface 50a can be reduced, and the bending durability can be improved. Can do. Thereby, for example, even when the controller 99 disposed on the vehicle body 9 side and the electric brake device 1 fixed on the wheel 900 side via the suspension device 90 are connected by the composite cable 2, the electrical power in the composite cable 2 is maintained over a long period of time. Increase in resistance and occurrence of disconnection can be suppressed.

(2) The central conductors 31 and 41 of the first and second electric wires 3 and 4 are composed of a plurality of strand conductors 30 and 40 formed by twisting a plurality of strands 300 and 400 in the strand conductors 30 and 40. Since the parent twist is performed in the same direction as the twist direction of the wires 300 and 400, the bending durability of the composite cable 2 can be further improved as compared with the case where these twist directions are opposite directions. That is, by making the twist direction of the strands 300 and 400 in the child twisted conductors 30 and 40 and the twist direction of the plurality of child twisted conductors 30 and 40 in the center conductors 31 and 41 the same direction, for example, FIG. , (C), the extending direction of the strands 300 and 400 is greatly inclined with respect to the axial direction (longitudinal direction) of the composite cable 2. As a result, when the composite cable 2 is bent, the twisted and loosened strands of the strands 300 and 400 cause the child twisted conductors 30 and 40 and the center conductors 31 and 41 to flexibly expand and contract, and the composite cable 2 is bent. Durability is further improved.

(3) Since the lubricant 6 interposed between the first and second electric wires 3 and 4 and the sheath 5 is made of powder having a particle size of 5 μm or more and 50 μm or less, when the composite cable 2 is bent, The force that the first and second electric wires 3 and 4 receive from the inner surface 50a in the inner space 50 of the sheath 5 is sufficiently reduced, and the bending durability of the composite cable 2 can be further improved.

(4) Since the 1st electric wire 3 and the 2nd electric wire 4 are mutually twisted, when the composite cable 2 curves, either one of the 1st and 2nd electric wires 3 and 4 is an electric wire. The distance located outside the curve and the other existing inside can be shortened, and the bending durability of the composite cable 2 can be further improved. That is, if the first electric wire 3 and the second electric wire 4 are not twisted together, the first and second electric wires 3 and 4 are arranged parallel to each other along the axial direction of the composite cable 2. For example, when the composite cable 2 is bent, the first electric wire 3 may be located outside the curve and the second electric wire 4 may be located inside the curve over the entire range of the curve. In this case, the first electric wire 3 receives a force in a direction in which the first electric wire 3 is stretched in the longitudinal direction, and the second electric wire 4 receives a force in a direction in which the second electric wire 4 is compressed in the longitudinal direction. Thereby, although it becomes easy to generate | occur | produce disconnection in the strands 300 and 400, according to this Embodiment, since the 1st electric wire 3 and the 2nd electric wire 4 are mutually twisted, 1st and 2nd The distance at which the electric wires 3 and 4 are located outside or inside the curve is shortened, and disconnection of the strands 300 and 400 can be suppressed.

(5) The twisting direction of the first electric wire 3 and the second electric wire 4 is the twisting direction of the strands 300 and 400 in the child twisted conductors 30 and 40, and the twisted conductor 30 in the center conductors 31 and 41. Since it is opposite to the twisting direction of 40, the bending of the composite cable 2 in a natural state where the composite cable 2 is not fixed to a vehicle or the like is suppressed, and the routeability of the composite cable 2 can be improved. That is, in addition to the twisting direction of the strands 300 and 400 in the child twisted conductors 30 and 40 and the twisting direction of the child twisted conductors 30 and 40 in the center conductors 31 and 41, the first electric wire 3 and the second electric wire 4 When the twisting directions are the same, the composite cable 2 is bent in the natural state of the composite cable 2, and for example, the operation of routing the composite cable 2 on the routing path 981 (shown in FIG. 1). However, in the present embodiment, since the twisting direction of the first electric wire 3 and the second electric wire 4 is opposite, the bending of the composite cable 2 in the natural state is suppressed. , It becomes possible to improve the arrangement characteristics.
(6) The lubricant 6 is also interposed between the first electric wire 3 and the second electric wire 4. Thereby, it becomes possible to reduce the frictional resistance between the 1st electric wire 3 and the 2nd electric wire 4, and the bending durability of the composite cable 2 can further be improved.
(7) The sheath 5 has a JISA hardness of 80 degrees or more and 95 degrees or less. This makes it possible to reduce the collapse of the internal space 50 of the sheath 5 when the composite cable 2 is bent, and further reduce the frictional resistance between the first and second electric wires 3 and 4 and the sheath 5. Thus, the bending durability of the composite cable 2 can be further improved.

  Below, the experimental result of the 90 degree bending test and rocking | fluctuation endurance test of the composite cable 2 which concerns on the Example of this invention is shown. In addition, this invention is not limited to this Example.

The specifications of the composite cable 2 according to this example are as follows.
-Material of strands 300, 400: Tin-containing copper alloy-Strand diameter of strands 300, 400: 0.08mm
-Material of insulators 32, 42: Cross-linked polyethylene-Outer diameter of first and second electric wires 3, 4: 3.0 mm
・ Material of sheath 5: thermoplastic polyurethane ・ Outer diameter of sheath 5: 8.0 mm
Lubricant 6 material: Talc powder (average particle size 11 μm)
・ Sheath hardness: JISA90

(90 ° bending test)
A 90 ° bend test was performed using the composite cable 2 having the above specifications. In this 90 ° bending test, the composite cable 2 was bent 90 ° in opposite directions across the fulcrum while pulling the composite cable 2 with a load of 2 kgf with a bending radius of 10 mm and a bending speed of 30 times / minute. . The number of bends is one bend from the neutral position (position where the composite cable 2 is in a straight line state) to 90 ° bent to one side, further to the other through 90 ° to return to the neutral position, At normal temperature (25 ° C.) and low temperature (−35 ° C.), the number of bends until disconnection (total disconnection at which the composite cable 2 was completely disconnected) occurred was counted.

  When this test was performed on the three composite cables 2 having the above specifications, the average value of the number of bendings until disconnection occurred at room temperature was 49,645. Further, the average value of the number of bendings until disconnection occurred at a low temperature was 10,705. Thereby, it was confirmed that it has sufficient bending durability.

(Swing endurance test)
A swing durability test was conducted using the composite cable 2 having the above specifications. In this swing endurance test, one end of the composite cable 2 is fixed at 2.14 million times at room temperature (25 ° C.), 430,000 times at low temperature (−40 ° C.) and 430,000 times at high temperature (90 ° C.). Then, the other end was swung in the vertical direction, and the electrical resistance at both ends of the first and second electric wires 3 and 4 was measured. As for the swing distance, the distance from the neutral position to the upper end position is 60 mm, the distance from the neutral position to the lower end position is also 60 mm, and a cycle of returning from the neutral position to the neutral position through the upper end position and the lower end position is performed once. It was dynamic. The cable length from the fulcrum (fixed point) of the composite cable 2 to the end (moving point) that moves up and down at the above distance was 308 mm.

  This test was referred to as No. It carried out with respect to the composite cable 2 of the said 5 specifications of 1-5. The average of the initial values of the electric resistance at both ends of the first and second electric wires 3 and 4 is 6.91 mΩ / m, and the electric resistance after the above number of swings is 10 mΩ / m. The evaluation was “OK”. Table 1 shows the experimental results.

  As shown in Table 1, no. For each of the first and second electric wires 3 and 4 of the composite cable 2 of 1 to 5, the electrical resistance after swinging was 10 mΩ / m or less, and the evaluation was “OK”. Thereby, it was confirmed that it has sufficient swing durability.

[Second Embodiment]
FIG. 5 is a sectional view showing a composite cable 2A according to the second embodiment of the present invention. In the composite cable 2A, the first signal line 71 and the second signal line 72 are covered with the sheath 5 in addition to the first and second electric wires 3 and 4, and the composite according to the first embodiment is used. Different from cable 2. Since the other configuration is the same as that of the composite cable 2 according to the first embodiment, elements having the same function and configuration are denoted by the same reference numerals as those described for the first embodiment. The duplicate description will be omitted.

  The first signal line 71 is an insulated wire formed by covering the central conductor 711 with an insulator 712. The second signal line 72 is an insulated wire formed by covering the center conductor 721 with an insulator 722. The lubricant 6 is interposed between the outer peripheral surface 71 a of the first signal line 71 and the outer peripheral surface 72 a of the second signal line 72 and the inner surface 50 a in the inner space 50 of the sheath 5. The lubricant 6 is formed between the outer peripheral surface 3 a of the first electric wire 3 and the outer peripheral surface 4 a of the second electric wire 4, between the outer peripheral surface 71 a of the first signal line 71, the first electric wire 3, and the second electric wire 4. Between the outer peripheral surfaces 3 a and 4 a and between the outer peripheral surface 71 a of the first signal line 71 and the outer peripheral surface 72 a of the second signal line 72.

  The first signal line 71 and the second signal line 72 can be used to transmit an output signal of the axial force sensor 15 of the electric brake device 1 to the controller 99, for example. Moreover, you may transmit the output of the rotational speed sensor (not shown) of the wheel 900 by the 1st signal line 71 and the 2nd signal line 72, for example.

  Also by the composite cable 2A according to the present embodiment, the same operations and effects as those of the composite cable 2 according to the first embodiment can be obtained. Further, since the first signal line 71 and the second signal line 72 are accommodated in the sheath 5 together with the first and second electric wires 3 and 4, for example, the electric brake device 1 of the electric brake device 1 is used by one composite cable 2 </ b> A. While supplying current to the electromagnetic coil 143 a of the parking brake mechanism 14, the output signal of the axial force sensor 15 can be transmitted to the controller 99. Furthermore, the bending durability of the first signal line 71 and the second signal line 72 can be improved by the lubricant 6.

  The first signal line 71 and the second signal line 72 are collectively covered with the inner jacket 8 as in the composite cable 2B according to the second embodiment shown in FIG. May be accommodated in the sheath 5. In this case, by interposing the lubricant 6 between the outer peripheral surface 8a of the inner jacket 8 and the inner surface 50a of the inner space 50 of the sheath 5, the first signal line 71 and the second signal line 71 covered by the inner jacket 8 are provided. The bending durability of the signal line 72 is improved. Further, the lubricant 6 is also interposed between the outer peripheral surface 8a of the inner jacket 8 and the outer peripheral surfaces 3a and 4a of the first electric wire 3 and the second electric wire 4, whereby the inner jacket 8 and the first and second electric wires 3 and 4 are interposed. The frictional resistance between the two electric wires 3 and 4 is reduced.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  Further, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention. For example, in the above-described embodiment, the case where the composite cables 2 and 2A are used for operating the parking brake mechanism 14 of the electric brake device 1 is described. However, the present invention is not limited thereto, and the electric motor 11 of the electric brake device 1 is used. The composite cables 2 and 2A may be used to supply the motor current for the operation.

  In the above embodiment, the parking brake mechanism 14 of the electric brake device 1 mainly controls the braking force during parking by restricting the rotation of the shaft 110 of the electric motor 11 for braking the vehicle during traveling. The case where it is configured to be maintained has been described, but the present invention is not limited to this, and in addition to the hydraulic brake device that performs braking during traveling, the composite cable 2 is connected to an electric brake device that is provided separately for a parking brake. May be.

  Moreover, the number of the strand twist conductors 30 and 40 in the 1st and 2nd electric wires 3 and 4, the number of the strands 300 and 400, the outer diameter of the 1st and 2nd electric wires 3 and 4, etc. are required. It can be set as appropriate according to the current capacity.

(Summary of embodiment)
Next, the technical idea grasped from the embodiment described above will be described with reference to the reference numerals in the embodiment. However, each reference numeral in the following description does not limit the constituent elements in the claims to members or the like specifically shown in the embodiment.

[1] A wheel side device (1) fixed to the wheel (900) side via a suspension device (90) with respect to the vehicle body (9), and a vehicle body side device (99) arranged on the vehicle body (9) side. A plurality of electric wires (3, 4) in which a central conductor (31, 41) is insulation-coated, and the plurality of electric wires (3,4). ), And the central conductor (31, 41) is a stranded wire formed by twisting a plurality of strands having a strand diameter of 0.05 mm or more and 0.12 mm or less. And a lubricant that is interposed between the plurality of electric wires (3, 4) and the sheath (5) and reduces frictional resistance between the plurality of electric wires (31, 41) and the sheath (5). The vehicle composite cable (2, 2A) further comprising (6).

[2] The central conductor (31, 41) includes a plurality of child twisted conductors (31, 41) formed by twisting the plurality of strands (300, 400) in the child twisted conductor (31, 41). The vehicle composite cable (2, 2A) according to [1], wherein the vehicle is twisted in the same direction as the stranding direction of the strands (300, 400).

[3] The vehicle composite cable (2, 2A) according to [1] or [2], wherein the lubricant (6) is made of powder having a particle size of 5 μm or more and 50 μm or less.

[4] The vehicle composite cable (2, 2A) according to any one of [1] to [3], wherein the plurality of electric wires (3, 4) are twisted together.

[5] The vehicle composite cable (2, 2A) according to any one of [1] to [3], wherein the lubricant (6) is also interposed between the plurality of electric wires (3, 4). ).

[6] The vehicle composite cable (2, 2A) according to any one of [1] to [5], wherein the sheath (5) has a JISA hardness of 80 degrees to 95 degrees.

[7] The composite cable for a vehicle (2, 2A) according to any one of [1] to [6], in which a strand diameter of the plurality of strands is 0.07 mm or less and 0.09 mm or more.

DESCRIPTION OF SYMBOLS 1 ... Electric brake device (wheel side device), 1a, 1b ... Brake pad, 2, 2A ... Composite cable, 3 ... First electric wire, 4 ... Second electric wire, 3a, 4a ... Outer peripheral surface, 5 ... Sheath DESCRIPTION OF SYMBOLS 5a ... Outer peripheral surface, 6 ... Lubricant, 8 ... Inner jacket, 9 ... Vehicle body, 10 ... Main part, 11 ... Electric motor, 12 ... Deceleration mechanism, 13 ... Thrust generating mechanism, 14 ... Parking brake mechanism, 15 ... Shaft Force sensor, 16 ... device-side connector, 20 ... connector, 30, 40 ... child twisted conductor, 31,41 ... center conductor, 32,42 ... insulator, 50 ... internal space, 50a ... inner surface, 71 ... first signal Wire 72, second signal wire 90, suspension device 91, upper arm, 92 lower arm, 93 shock absorber, 94 suspension spring, 95 knuckle, 96 hub unit, 97 brake rotor, 98 Wheel housing, 98a ... outlet port, 99 ... controller (vehicle body side device), 100 ... caliper, 101 ... claw part, 102 ... flange part, 103 ... arm part, 110 ... shaft, 131,132 ... output member, 141 ... first DESCRIPTION OF SYMBOLS 1 Engagement member, 141a ... Engagement protrusion, 142 ... 2nd engagement member, 142a ... Engagement protrusion, 143 ... Solenoid mechanism, 143a ... Electromagnetic coil, 300, 400 ... Elementary wire, 711, 721 ... Center conductor, 712 722 ... Insulator, 900 ... Wheel, 901 ... Wheel, 902 ... Tire, 951 ... First mounting portion, 952 ... Second mounting portion, 953 ... Third mounting portion, 961 ... Hub outer ring, 962 ... Hub wheel, 962a ... Wheel mounting flange, 971 ... Friction part, 972 ... Fixing part, 981 ... Rating route

Claims (7)

A vehicle composite cable for connecting between a wheel side device fixed on the wheel side and a vehicle body side device arranged on the vehicle body side,
An assembly formed by bundling a plurality of electric wires formed by insulatingly covering the first center conductor with an insulator made of crosslinked polyethylene and a plurality of signal lines formed by insulatingly covering the second center conductor with an insulator. When,
A sheath made of thermoplastic polyurethane covering the aggregate;
With
The first central conductor is a stranded wire formed by twisting a plurality of strands having a strand diameter of 0.05 mm or more and 0.12 mm or less,
The outer diameter of the plurality of electric wires is larger than the outer diameter of the plurality of signal lines,
The signal line is disposed in a valley between two of the plurality of electric wires,
Interposed between the plurality of electric wires and the sheath, between the plurality of signal lines and the sheath, and between the two electric wires and the signal line in the valley, the plurality of electric wires and the sheath, Further comprising a lubricant made of powder that reduces frictional resistance between the plurality of signal lines and the sheath and between the two electric wires and the signal lines in the valleys. . The center conductor is formed by twisting a plurality of child twisted conductors obtained by twisting the plurality of strands in the same direction as the stranding direction of the strands in the child twisted conductor.
The composite cable for vehicles according to claim 1. The particle size of the powder is 5 μm or more and 50 μm or less.
The composite cable for vehicles according to claim 1 or 2. The plurality of electric wires are twisted together,
The composite cable for vehicles according to any one of claims 1 to 3. The composite cable for vehicles according to any one of claims 1 to 4, wherein the lubricant is interposed between the plurality of electric wires and between the plurality of signal lines. The composite cable for a vehicle according to any one of claims 1 to 5, wherein the sheath has a JISA hardness of 80 degrees or more and 95 degrees or less. The composite cable for vehicles according to any one of claims 1 to 6, wherein a strand diameter of the plurality of strands is not less than 0.07 mm and not more than 0.09 mm.

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