JP2018137243A - Composite cable for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite cable for an automobile capable of reducing noise interference and cross-talk between twist-pair wires.SOLUTION: A composite cable 1 for an automobile includes a wire bundle 2 and a sheath 3 for covering the wire bundle 2. The wire bundle 2 includes a first twist pair wire 21 having two cores, a second twist pair wire 22 having two cores, a first wire 23 having one core, and a second wire 24 having one core. In the wire bundle 2, in a cross-section of the cable, a first twist pair wire 21 is placed on one side of a center line L binding a center O1 of the first wire 23 and a center O2 of a second wire 24, a second twist pair wire 22 is placed on the other side of the center line L, and the first twist pair wire 21 and the second twist pair wire 22 are isolated from each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an automotive composite cable.

  2. Description of the Related Art Conventionally, in the automobile field, a multi-core composite cable is known in which a wire bundle formed by bundling a plurality of wires is covered with a sheath. Many wire bundles have a structure in which the wires are twisted together. In addition, as the electric wires constituting the electric wire bundle, there are a one-core electric wire whose outer periphery is covered with an insulator, a two-core twisted pair electric wire in which a pair of electric wires are twisted together, and the like.

  Prior Patent Document 1 discloses an automotive parking brake cable that is connected to an electric parking brake mechanism and an ABS sensor cable that is connected to an ABS sensor by covering them with a common outer sheath. A composite cable is disclosed.

JP 2014-241286 A

  By the way, when two twisted pair electric wires are twisted together in the electric wire bundle, there is a problem that noise interference and crosstalk occur between the twisted pair electric wires. If noise interference or crosstalk occurs in the composite cable, malfunction may occur.

  The present invention has been made in view of the above-described background, and an object of the present invention is to provide a composite cable for automobile that can reduce noise interference and crosstalk between twisted pair electric wires.

One aspect of the present invention is a wire bundle including a two-core first twisted-pair electric wire, a two-core second twisted-pair electric wire, a one-core first electric wire, and a one-core second electric wire,
A sheath for covering the wire bundle,
The wire bundle has a first twisted-pair electric wire disposed on one side of a center line connecting the center of the first electric wire and the center of the second electric wire when viewed in a cable cross section, The second twisted-pair electric wire is arranged on the other side, and the first twisted-pair electric wire and the second twisted-pair electric wire are in a composite cable for automobiles that are separated from each other.

  In the above-mentioned composite cable for automobiles, the wire bundle includes a first twisted pair electric wire disposed on one side of a center line connecting the center of the first electric wire and the center of the second electric wire as viewed in the cable cross section, A second twisted pair electric wire is arranged on the other side of the wire, and the first twisted pair electric wire and the second twisted pair electric wire are separated from each other. Therefore, according to the said composite cable for motor vehicles, the physical distance of a 1st twisted pair electric wire and a 2nd twisted pair electric wire is ensured reliably by the 1st electric wire and the 2nd electric wire, and electromagnetic noise is reduced. Therefore, the composite cable for automobiles can reduce noise interference and crosstalk between the first twisted pair electric wire and the second twisted pair electric wire.

It is explanatory drawing which showed typically the cable cross section of the composite cable for motor vehicles of Example 1 (Example 2). It is explanatory drawing which showed typically the cable cross section of the composite cable for motor vehicles of Example 3. FIG. It is explanatory drawing which showed typically the cable cross section of the composite cable for motor vehicles of Example 4. FIG.

  In the above-described composite cable for automobiles, the first twisted pair electric wire and the second twisted pair electric wire are both used while the automobile is running, and the first electric wire and the second electric cable are both used after the automobile is stopped. be able to.

  In this case, the physical distance between the first twisted pair electric wire and the second twisted pair electric wire used during the traveling of the automobile is reliably ensured by the first electric wire and the second electric wire that are not used during the traveling of the automobile. Electromagnetic noise during driving of the automobile is reduced. The use while the automobile is running includes not only the use when the automobile is running, but also the use when the automobile is stopped. Further, in this case, the first electric wire and the second electric wire that are used only after the automobile is stopped are grounded to the chassis or the like while the automobile is running, thereby reducing radiation noise during the running of the automobile. Therefore, in this case, it is possible to reduce noise interference and crosstalk between the first twisted-pair electric wire and the second twisted-pair electric wire while the automobile is running.

  In the above-described composite cable for automobiles, the first twisted-pair electric wire is used for transmitting a signal for detecting the rotational speed of the wheel in the automobile (hereinafter also referred to as “for ABS”), and the second twisted-pair cable. The electric wire is used to supply electric power for driving to a driving source that opens and closes a valve of a damper in the suspension of the automobile (hereinafter sometimes referred to as “for ADS”), and the first electric wire and the second electric wire are used. Any of the electric wires may be used for supplying electric power for driving to a brake caliper in an electric parking brake device of an automobile (hereinafter sometimes referred to as “for EPB”).

  In this case, the first twisted pair electric wire is used when the automobile is running and when it is stopped. The second twisted pair electric wire is used when the automobile is running. Further, both the first electric wire and the second electric wire are used after the automobile is stopped. Therefore, in this case, for the same reason as described above, it is possible to reliably reduce noise interference and crosstalk between the first twisted pair electric wire and the second twisted pair electric wire while the automobile is running.

  In the above-described composite cable for automobiles, the electric wire bundle can be specifically configured to be twisted in a state where the electric wires are bundled.

  In this case, it becomes easy to maintain the cable cross section in the wire bundle in the cable axial direction. Therefore, in this case, the above-described operational effects can be ensured. Moreover, it becomes easy to make a cable cross section circular. In the above-described composite cable for automobiles, the shape of the cable cross section may be, for example, a circular shape or an elliptical shape.

  In the above-described composite cable for automobile, the first twisted pair electric wire and / or the second twisted pair electric wire may be covered with a shield conductor. In this case, combined with the above-described effects, an automotive composite cable that is advantageous for improving noise resistance can be obtained. In addition, when the first twisted pair electric wire is for ABS and the second twisted pair electric wire is for ADS, the first twisted pair electric wire that often flows a lower current than the second twisted pair electric wire is covered with at least a shield conductor. Good. In this case, it becomes easy to improve the noise resistance characteristics of the composite cable for automobiles.

  Specifically as a shield conductor, metal foil, a braided wire, etc. can be illustrated, for example. The metal foil can be wound around the outer periphery of the twisted pair electric wire, or can be arranged vertically along the outer periphery of the twisted pair electric wire.

  In the above-described composite cable for automobiles, the twist pitch of the first twisted pair electric wire and the twist pitch of the second twisted pair electric wire may be the same or different from each other. In the latter case, a physical distance between the first twisted pair electric wire and the second twisted pair electric wire having different twist pitches is secured by the first electric wire and the second electric wire. Therefore, it is easy to reduce crosstalk between the first twisted pair electric wire and the second twisted pair electric wire.

  Specifically, the twist pitch of one twisted pair electric wire can be set to a pitch length of more than 1 to about 5 times the twist pitch of the other twisted pair electric wire. More specifically, for example, when the first twisted pair electric wire is for ABS and the second twisted pair electric wire is for ADS, the twist pitch of the second twisted pair electric wire is more than twice the twist pitch of the first twisted pair electric wire. It can be the pitch length. In this case, it becomes easy to improve the noise resistance characteristics of the composite cable for automobiles by reducing the twist pitch of the first twisted pair electric wire in which a lower current often flows than the second twisted pair electric wire.

  In the above-described composite cable for automobiles, the first twisted pair electric wire and the second twisted pair electric wire can be specifically configured by twisting two insulated electric wires whose outer periphery is covered with an insulator. Moreover, the 1st electric wire and the 2nd electric wire can be specifically comprised from the insulated wire by which the outer periphery of the conductor was coat | covered with the insulator.

  Specifically as a material of a conductor, copper, copper alloy, aluminum, aluminum alloy etc. can be illustrated, for example. Specific examples of the insulator material include polyolefin resins such as polyethylene and vinyl chloride resins such as vinyl chloride. As a material of the insulator, polyethylene can be preferably used from the viewpoint of heat resistance of about 120 ° C. and cost. In addition, each electric wire included in the wire bundle may be made of the same material as the conductor, or may be made of different materials, and the insulator may be made of the same material or different materials. Good.

  Specific examples of the material for the sheath in the above-described composite cable for automobiles include, for example, polyurethane resin, vinyl chloride resin, and the like. As the material of the sheath, a polyurethane resin can be suitably used from the viewpoint of damage resistance, wear resistance, and the like.

  In the above-described composite cable for automobiles, the wire bundle can include one or a plurality of other twisted pair wires and wires in addition to the above-described wires. In this case, from the viewpoint of ensuring the above-described operational effects, another twisted pair electric wire or electric wire is preferably covered with a shield conductor.

  The said composite cable for motor vehicles can have an inclusion layer between an electric wire bundle and a sheath. In this case, the degree of unevenness on the surface of the wire bundle is relaxed by the inclusion layer. Therefore, it is difficult to form irregularities on the outer surface of the sheath due to the irregularities on the surface of the electric wire bundle, and a composite cable for automobiles having a good appearance with less swell and the like is obtained. The inclusion layer can be composed of one layer or two or more layers.

  Examples of the material of the inclusion layer include papers, polyolefin resins such as polyethylene, talc, and the like. More specifically, for example, when the insulator of each electric wire in the electric wire bundle is polyethylene, the inclusion layer is composed of an inner layer made of paper and an outer layer made of polyethylene arranged outside the inner layer. It can be set as the structure which has. In this case, when the outer layer of the inclusion layer and the sheath are formed by two-layer extrusion molding, the insulator of each electric wire in the wire bundle and the outer layer of the inclusion layer are difficult to fuse, and a good sheath A composite cable for automobiles having a peelability can be obtained.

  In the above-described automobile composite cable, the first twisted pair electric wire and / or the second twisted pair electric wire may be covered with an inner sheath. Specific examples of the material of the inner sheath include polyolefin resin such as polyethylene, vinyl chloride resin, and the like.

  In addition, each structure mentioned above can be arbitrarily combined as needed, in order to acquire each effect etc. which were mentioned above.

  Hereinafter, the composite cable for motor vehicles of an Example is demonstrated using drawing. In addition, about the same member, it demonstrates using the same code | symbol.

Example 1
The automotive composite cable of Example 1 will be described with reference to FIG. As shown in FIG. 1, the automotive composite cable 1 of this example includes an electric wire bundle 2 and a sheath 3 that covers the electric wire bundle 2. The wire bundle 2 includes a two-core first twisted pair electric wire 21, a two-core second twisted pair electric wire 22, a one-core first electric wire 23, and a one-core second electric wire 24.

In this example, specifically, the first twisted-pair electric wire 21 has a configuration in which two insulated wires each having a conductor 211 covered with an insulator 212 are twisted in a spiral shape. The conductor 211 of the first twisted pair electric wire 21 is made of a copper alloy, and the conductor cross-sectional area is 0.3 mm ² . The insulator 212 is made of polyethylene. The 2nd twisted pair electric wire 22 has the structure by which the insulated wire with which the outer periphery of the conductor 221 was coat | covered with the insulator 222 was twisted in two spirals. The conductor 221 of the second twisted pair electric wire 22 is made of a copper alloy, and the conductor cross-sectional area is 0.5 mm ² . The insulator 222 is made of polyethylene. In addition, the twist pitch of the 1st twisted pair electric wire 21 and the twist pitch of the 2nd twisted pair electric wire 22 are set to the same pitch length. The sheath 3 is made of a polyurethane resin and has a thickness of 1.5 mm.

Further, in this example, specifically, the first electric wire 23 is configured by an insulated wire in which the outer periphery of the conductor 231 is covered with the insulator 232. The conductor 231 of the first electric wire 23 is made of a copper alloy, and the conductor cross-sectional area is 2.5 mm ² . The insulator 232 is made of polyethylene. The second electric wire 24 is composed of an insulated wire in which an insulator 242 is coated on the outer periphery of the conductor 241. The conductor 241 of the second electric wire 24 is made of a copper alloy, and the conductor cross-sectional area is 2.5 mm ² . The insulator 242 is made of polyethylene. In the electric wire bundle 2, the electric wires 21, 22, 23, and 24 are twisted in a bundled state.

  In this example, specifically, the first twisted pair electric wire 21 is for ABS. The second twisted pair electric wire 22 is for ADS. Both the first electric wire 23 and the second electric wire 24 are for EPB.

  Here, in the wire bundle 2, the first twisted pair electric wire 21 is arranged on one side of the center line L connecting the center O <b> 1 of the first electric wire 23 and the center O <b> 2 of the second electric wire 24 when viewed in the cable cross section. At the same time, the second twisted pair electric wire 22 is arranged on the other side of the center line L. And the 1st twisted pair electric wire 21 and the 2nd twisted pair electric wire 22 are mutually spaced apart. That is, the first twisted pair electric wire 21 and the second twisted pair electric wire 22 are in a non-contact state. As long as the first twisted pair electric wire 21 and the second twisted pair electric wire 22 are separated from each other, the first electric wire 23 and the second electric wire 24 may be in contact with each other. You may be in the state of contact.

  In this example, the automotive composite cable 1 further includes an inclusion layer 4 between the wire bundle 2 and the sheath 3. Specifically, the inclusion layer 4 has a two-layer structure including an inner layer 41 that covers the wire bundle and an outer layer 42 that is disposed outside the inner layer 41. The inner layer 41 is made of paper, and the outer layer 42 is made of polyethylene.

  Next, the effect of the composite cable for automobiles of this example will be described.

  In the automotive composite cable 1 of this example, the wire bundle 2 is a first twisted pair on one side of the center line L connecting the center O1 of the first wire 23 and the center O2 of the second wire 24 when viewed in the cable cross section. The electric wire 21 is arranged, the second twisted pair electric wire 22 is arranged on the other side of the center line L, and the first twisted pair electric wire 21 and the second twisted pair electric wire 22 are separated from each other. Therefore, according to the composite cable 1 for an automobile of this example, the physical distance between the first twisted pair electric wire 21 and the second twisted pair electric wire 22 is reliably ensured by the first electric wire 23 and the second electric wire 24, and the electromagnetic Noise is reduced. Therefore, the automotive composite cable 1 of this example can reduce noise interference and crosstalk between the first twisted pair electric wire 21 and the second twisted pair electric wire 22.

  Further, the composite cable for automobile 1 of the present example is configured such that the first electric wire 23 and the second electric wire 24 that are used only after the automobile is stopped are grounded to a chassis or the like while the automobile is running, thereby radiating noise during the running of the automobile. Is reduced. Therefore, the automotive composite cable 1 of this example is useful for reducing noise interference and crosstalk between the first twisted pair electric wire 21 and the second twisted pair electric wire 22 while the automobile is running.

(Example 2)
The automotive composite cable of Example 2 will be described with reference to FIG. In the automotive composite cable 1 of this example, the twist pitch of the second twisted pair electric wire 22 for ADS is set to a pitch length that is twice the twist pitch of the first twisted pair electric wire 21 for ABS. Other configurations are the same as those of the first embodiment.

  In the automotive composite cable 1 of this example, the twist pitch of the first twisted pair electric wire 21 in which a lower current often flows than the second twisted pair electric wire 22 is set to a pitch length smaller than the twisted pitch of the second twisted pair electric wire 22. ing. Therefore, the composite cable for automobile 1 is advantageous for improving the noise resistance. Other functions and effects are the same as those of the first embodiment.

(Example 3)
The automotive composite cable of Example 3 will be described with reference to FIG. In the automotive composite cable 1 of this example, a first twisted pair electric wire 21 for ABS is covered with a shield conductor 5. Specifically, the shield conductor 5 is formed by horizontally winding an aluminum alloy foil that is a metal foil. Other configurations are the same as those of the first embodiment.

  In the automobile composite cable 1 of the present example, the first twisted pair electric wire 21 in which a lower current often flows than the second twisted pair electric wire 22 is covered with the shield conductor 5. Therefore, the composite cable for automobile 1 is advantageous for improving the noise resistance. Other functions and effects are the same as those of the first embodiment.

Example 4
The automobile composite cable of Example 4 will be described with reference to FIG. The composite cable for automobile 1 of this example is an example in which the wire bundle includes another two-core twisted pair electric wire 25 in addition to the electric wires 21, 22, 23, and 24 described above. In this example, the twisted pair electric wire 25 is covered with a shield conductor 251. Specifically, the shield conductor 251 is formed by horizontally winding an aluminum alloy foil that is a metal foil.

  Also according to this example, the same effects as those of the first embodiment can be achieved.

  As mentioned above, although the Example of this invention was described in detail, this invention is not limited to the said Example, A various change is possible within the range which does not impair the meaning of this invention.

DESCRIPTION OF SYMBOLS 1 Composite cable for motor vehicles 2 Wire bundle 21 1st twisted pair electric wire 22 2nd twisted pair electric wire 23 1st electric wire 24 2nd electric wire 3 Sheath O1 Center of 1st electric wire O2 Center of 2nd electric wire L Center line

Claims (8)

A wire bundle including a two-core first twisted pair electric wire, a two-core second twisted pair electric wire, a one-core first electric wire, and a one-core second electric wire;
A sheath for covering the wire bundle,
The wire bundle has a first twisted-pair electric wire disposed on one side of a center line connecting the center of the first electric wire and the center of the second electric wire when viewed in a cable cross section, The composite cable for automobiles, wherein the second twisted pair electric wire is arranged on the other side, and the first twisted pair electric wire and the second twisted pair electric wire are separated from each other. Both the first twisted pair electric wire and the second twisted pair electric wire are used while the automobile is running,
The composite cable for automobile according to claim 1, wherein both the first electric wire and the second electric wire are used after the automobile is stopped. The first twisted pair electric wire is used for transmitting a signal for detecting the rotational speed of a wheel in an automobile,
The second twisted pair electric wire is used for supplying driving power to a driving source for opening and closing a damper valve in a suspension of an automobile.
3. The automobile composite according to claim 1 or 2, wherein each of the first electric wire and the second electric wire is used for supplying driving electric power to a brake caliper in an electric parking brake device of an automobile. cable.   The said electric wire bundle is a composite cable for motor vehicles of any one of Claims 1-3 currently twisted together in the state in which each electric wire was bundled.   The said 1st twisted pair electric wire and / or the said 2nd twisted pair electric wire are the composite cables for motor vehicles of any one of Claims 1-4 coat | covered with the shield conductor.   The composite cable for automobiles according to any one of claims 1 to 5, wherein a twist pitch of the first twisted pair electric wire and a twist pitch of the second twisted pair electric wire are different from each other. And further comprising an inclusion layer disposed between the wire bundle and the sheath,
The inclusion layer has an inner layer composed of paper covering the electric wire bundle, and an outer layer composed of polyethylene disposed outside the inner layer,
The first twisted pair electric wire, the second twisted pair electric wire, the first electric wire, and the second electric wire are not covered with a shield conductor,
The said 1st electric wire and the said 2nd electric wire ensure the physical distance of the said 1st twisted pair electric wire and the said 2nd twisted pair electric wire, and are comprised so that electromagnetic noise may be reduced. The composite cable for automobiles according to claim 1. And further comprising an inclusion layer disposed between the wire bundle and the sheath,
A space is provided between the surface of the wire bundle and the inner layer surface of the inclusion layer,
The first twisted pair electric wire, the second twisted pair electric wire, the first electric wire, and the second electric wire are not covered with a shield conductor,
The said 1st electric wire and the said 2nd electric wire ensure the physical distance of the said 1st twisted pair electric wire and the said 2nd twisted pair electric wire, and are comprised so that electromagnetic noise may be reduced. The composite cable for automobiles according to claim 1.

Images