JP7112921B2 - Composite cable and wire harness - Google Patents

Description

This invention relates to composite cables and wire harnesses for vehicles.

For example, in order to operate the vehicle's ABS (Anti-lock Brake System), the vehicle is provided with a wheel speed sensor that is used to measure the rotational speed of the wheels. A sensor portion (sensor head) of the wheel speed sensor is installed near the wheel. A wheel speed sensor cable connects between the sensor unit and a control device of the vehicle.

Some vehicles are equipped with an electric brake including an electric parking brake (EPB), which is an electric parking brake. In electric braking, the controller drives brake calipers mounted on the wheels to apply the brakes. An electric brake cable connects between the brake caliper and the control device.

One end of the wheel speed sensor cable and the electric brake cable is connected to the control device, and the other end is connected to the wheel or a device in the vicinity of the wheel. As described above, with respect to cables having ends connected at close positions, there is a demand to integrate the cables from the viewpoint of reducing the wiring space and facilitating the wiring work. Therefore, a composite cable in which a plurality of cables are integrated has been proposed (see Patent Document 1, for example).

JP 2014-232731 A

When a plurality of cables are bundled to form a composite cable, the plurality of cables are twisted, paper or the like is wrapped around the twisted cable to stabilize the positional relationship of the cables, and the outer jacket is covered. Here, depending on the temperature at which the outer jacket is coated, the surface of the cable having a coating that has not undergone cross-linking treatment or the like softens, and paper or the like adheres to it. After coating the outer jacket, there is a process of stripping and removing the cable coating in order to attach the connector to the end. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a composite cable or the like configured to prevent paper or the like from adhering to the cable in order to solve the above-described problems.

A composite cable according to the present invention includes a brake wire having a conductor wire covered with an insulator, and an electric brake cable connected to a brake mechanism that suppresses rotation of a wheel, and a conductor wire covered with an insulator. A wheel speed sensor cable having a plurality of signal wires and a signal wire jacket covering the plurality of signal wires and connected to a wheel speed sensor used for measuring the rotation speed of a wheel; an electric brake cable and a wheel speed sensor cable; and an outer jacket covering the twisted wire wound with the pressing wrapping paper. Lubricant is applied to at least the outer circumference of the signal wire jacket in the wheel speed sensor cable. It is.

Further, in the composite cable according to the present invention, the signal line jacket and the outer jacket are made of polyurethane with different hardness.

Furthermore, in the composite cable according to the present invention, the twisting direction of the electric brake cable and the wheel speed sensor cable is in the same direction as the winding direction of the holding paper wrapped around the twisted wire.

A wire harness according to the present invention includes the composite cable described above.

According to the present invention, since lubricant is applied to the outer periphery of the wheel speed sensor cable, it is possible to prevent adhesion of the pressing roll paper to the wheel speed sensor cable. Therefore, the signal line jacket covering the wheel speed sensor cable can be easily removed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the wire harness 100 which concerns on Embodiment 1 of this invention. FIG. 2 is a diagram showing the internal configuration of composite cable 10 according to Embodiment 1 of the present invention; FIG. 9 is a diagram showing the relationship between the twisting direction of the twisted wires and the winding direction of the pressing wrapping paper 40 in the composite cable 10 according to Embodiment 2 of the present invention. FIG. 10 is a diagram showing the internal configuration of a composite cable 10 according to Embodiment 3 of the present invention; FIG. 10 is a diagram showing the internal configuration of a composite cable 10 according to Embodiment 4 of the present invention; FIG. 10 is a diagram showing the internal configuration of a composite cable 10 according to Embodiment 5 of the present invention; FIG. 10 is a diagram showing a wire harness 100 according to Embodiment 5 of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same reference numerals denote the same or corresponding parts, and are common throughout the embodiments described below. Also, regarding the level of temperature, etc., it is assumed that the level is not determined in relation to an absolute value, but is relatively determined by the state, operation, etc. of the device. In the drawings, there are cases where the size relationship of each component such as equipment and elements is different from the actual size.

FIG. 1 is a diagram showing a wire harness 100 according to Embodiment 1 of the present invention. As shown in FIG. 1, wire harness 100 has composite cable 10 . The composite cable 10 is a long cable formed by wrapping the electric brake cable 20 and the wheel speed sensor cable 30 with a pressing wrapping paper 40 shown in FIG. It is a cable with a length of about 50 cm to 1 m. However, the cable length can be changed as appropriate according to the vehicle size. The composite cable 10 is attached with a grommet 80 for fixing a fixture that attaches the composite cable 10 to the vehicle body.

Both ends of the composite cable 10 are not covered with the outer jacket 50, and the two brake lines 21 of the wheel speed sensor cable 30 and the electric brake cable 20 are exposed and branched. A connector 61 connected to the braking mechanism 300 is provided at one end of the electric brake cable 20 . A connector 62 connected to the first control device 201 is provided at the other end of the electric brake cable 20 . Although not particularly limited, in order to protect the exposed brake wire 21 of the electric brake cable 20, the brake wire 21 may be covered with a tube or the like.

A connector 63 is provided at one end of the wheel speed sensor cable 30 to be connected to a wheel speed sensor 400 used to measure the rotational speed of a wheel. Although the wheel speed sensor cable 30 and the wheel speed sensor 400 are connected via the connector 63 here, they may be directly connected. A connector 64 connected to the second control device 202 is provided at the other end of the wheel speed sensor cable 30 .

An electric brake cable 20 and a wheel speed sensor cable 30 are bundled with a composite cable 10, and connectors 61 to 64 are attached to form a wire harness 100, thereby improving attachment of various cables and saving space.

FIG. 2 is a diagram showing the internal configuration of composite cable 10 according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along line AA shown in FIG. The electric brake cable 20 has two brake lines 21 . The electric brake cable 20 is a line for sending a signal for driving the brake mechanism 300 from the first control device 201 when stopping the vehicle having the wire harness 100 . A braking mechanism 300, such as a brake, is actuated based on the signal to restrain the rotation of the wheels and stop or decelerate the vehicle. Here, braking mechanism 300 in Embodiment 1 is described as an electric parking brake (EPB) mechanism that is driven by an instruction from a driver or the like after the vehicle stops, but is not particularly limited. For example, braking mechanism 300 may be an electro-mechanical brake (EMB) mechanism.

The brake wire 21 is configured by covering a conductor wire 21a with an insulator 21b. Conductor wire 21a is, for example, a copper wire or a copper alloy wire. The insulator 21b is made of, for example, XLPE (crosslinked polyethylene), ETFE (tetrafluoroethylene-ethylene copolymer), or the like, in order to ensure insulation and heat resistance.

Further, the wheel speed sensor cable 30 is a cable having two signal lines 31 . A signal line 31 is a line for sending signals between the wheel speed sensor 400 and the second control device 202 . The wheel speed sensor cable 30 has a wheel speed sensor WSS jacket 32 (hereinafter referred to as a WSS jacket 32 ) serving as a signal line jacket for protecting the signal line 31 . The signal line 31 is configured by covering a conductor line 31a with an insulator 31b. The conductor wire 31a is, for example, a copper wire or a copper alloy wire, like the conductor wire 21a. The insulator 31b is made of, for example, XLPE, like the insulator 21b. In Embodiment 1, the WSS jacket 32 is made of thermoplastic resin. Here, the WSS jacket 32 is described as being made of thermoplastic polyurethane. Polyurethane has the property of being soft and flexible. Therefore, the WSS jacket 32 made of polyurethane is convenient for the wire harness 100 which vibrates frequently near the wheel. Also, as will be described later, the temperature at which the outer jacket 50 covers is relatively low. Therefore, in the composite cable 10 of Embodiment 1, the WSS jacket 32 is not cross-linked to ensure flexibility.

Here, in the wheel speed sensor cable 30 of Embodiment 1, talc powder 33 serving as a lubricant is applied to the outer peripheral surface of the WSS jacket 32 . The talc powder 33 is powdered talc. The talc powder 33 acts as a lubricant, reduces friction between the brake line 21 and the WSS jacket 32, reduces stress applied to the cable during bending, and improves bending resistance. In particular, the talc powder 33 has a higher melting point than the temperature to which the WSS jacket 32 is exposed when covering the outer jacket 50 . Therefore, the talc powder 33 inhibits the contact between the WSS jacket 32 and the holding paper 40, and prevents the surface of the WSS jacket 32 from softening and melting, thereby protecting the WSS jacket 32 from adhesion of the holding paper 40. be able to. The talc powder 33 is sprinkled and attached to the wheel speed sensor cable 30 at a stage prior to the step of twisting the two brake lines 21 of the electric brake cable 20 and the wheel speed sensor cable 30. . Here, in the composite cable 10 of Embodiment 1, the talc powder 33 is applied as a lubricant, but the lubricant is not limited to this. Any other lubricating material may be used as long as it protects the WSS jacket 32 from adhering to the hold down paper wrapper 40 . Further, in the composite cable 10 of Embodiment 1, the talc powder 33 is attached only to the wheel speed sensor cable 30, but as long as it is attached to at least the wheel speed sensor cable 30, it is not limited to this. For example, the two brake lines 21 of the electric brake cable 20 may also be coated with the talc powder 33 . In Embodiment 1, the two brake lines 21 of the wheel speed sensor cable 30 and the electric brake cable 20 are provided in contact with each other.

The holding paper 40 is spirally wound around a twisted wire (hereinafter simply referred to as a twisted wire) formed by twisting the two brake wires 21 of the electric brake cable 20 and the wheel speed sensor cable 30 . In addition, when covering the outer jacket 50 with respect to the twisted wire, the pressing wrapping paper 40 covers the outer periphery of the twisted wire, and the positional relationship between the two brake wires 21 in the electric brake cable 20 and the wheel speed sensor cable 30 is determined. stabilize the And, when covering the stranded wire with the outer jacket 50, the stranded wire is protected. Here, the type of paper for the pressing roll paper 40 is not particularly limited. In addition, although paper is used as a material for winding a twisted wire, the present invention is not limited to this. For example, a non-woven fabric or the like may be used as a material to wind the twisted wire.

In composite cable 10 in wire harness 100 of Embodiment 1, outer jacket 50 is made of a thermoplastic resin such as polyurethane having thermoplasticity, like WSS jacket 32 . Here, although the outer jacket 50 and the WSS jacket 32 in the first embodiment are made of thermoplastic resin, the hardness of each resin is different. In composite cable 10 of Embodiment 1, outer jacket 50 is softer than WSS jacket 32 . As mentioned above, polyurethane has the characteristic of being easily bendable. Therefore, in the composite cable 10, the outer jacket 50 covering the outside is softer. The softer the outer jacket 50 is, the higher the impact resistance is, and the impact caused by the pebbles flying from the ground can be absorbed, and the internal cable can be protected. The hardness of polyurethane can be adjusted by changing the blending amount of a plasticizer such as phosphate ester. The Shore A hardness of the material used for the outer jacket 50 is selected in the range of 80-90, and the Shore A hardness of the material used in the WSS jacket 32 is selected in the range of 80-95. The Shore A hardness of the material of the jacket 50 is preferably about 5 to 10 lower than the Shore A hardness of the material of the WSS jacket 32 .

When the stranded wire is covered with the outer jacket 50, the surface of the WSS jacket 32 is exposed to high temperature and softened. Therefore, by sprinkling the surface of the WSS jacket 32 with the talc powder 33, the WSS jacket 32 is prevented from adhering to the holding paper 40. - 特許庁

As described above, according to the wire harness 100 of Embodiment 1, the electric brake cable 20 and the wheel speed sensor cable 30 are combined into the composite cable 10 covered with the outer jacket 50 . Therefore, since the electric brake cable 20 and the wheel speed sensor cable 30 are integrated, the wiring space of the vehicle can be effectively used, and the wiring work can be facilitated.

According to the wire harness 100 of Embodiment 1, the talc powder 33 is attached to at least the surface of the wheel speed sensor cable 30 (WSS jacket 32). Therefore, it is possible to prevent the wrapping paper 40 from adhering to the WSS jacket 32 of the cable 30 for the wheel speed sensor. Therefore, the WSS jacket 32 covering the wheel speed sensor cable 30 can be easily removed.

Further, in Embodiment 1, the WSS jacket 32 and the outer jacket 50 differ in hardness. For this reason, the composite cable 10 can be configured with a hardness suitable for the respective roles of the WSS jacket 32 inside the outer jacket 50 and the outer jacket 50 outside. Also, the material of the outer jacket 50 has a lower melting point than the material of the WSS jacket 32 . Therefore, the outer jacket 50 can be covered without subjecting the WSS jacket 32 to cross-linking treatment.

Embodiment 2.
FIG. 3 is a diagram showing the relationship between the twisting direction of the twisted wires and the winding direction of the pressing wrapping paper 40 in the composite cable 10 according to Embodiment 2 of the present invention. Although not specifically described in the first embodiment, in the composite cable 10 of the second embodiment, the twisting direction of the twisted wires and the winding direction of the pressing wrapping paper 40 are the same. In FIG. 3, the twisting direction of the twisted wire and the winding direction of the pressing paper wrapper 40 are clockwise. Here, the pitch at which the wrapping paper 40 is wound is narrower than the pitch at which the stranded wire is twisted and the pitch at which the wrapping paper 40 is wound. The positional relationship between the two brake lines 21 of the electric brake cable 20 and the wheel speed sensor cable 30 can be more stabilized by winding the pressing paper 40 at a narrower pitch.

According to the composite cable 10 of Embodiment 2, the direction of twisting of the twisted wire and the direction of winding the wrapping paper 40 are the same, so that the wrapping paper 40 can be wound around the twisted wire without loosening.

Embodiment 3.
FIG. 4 is a diagram showing the internal configuration of composite cable 10 according to Embodiment 3 of the present invention. The composite cable 10 of FIG. 4 has a metal shield 34 between the two signal lines 31 and the WSS jacket 32 in the wheel speed sensor cable 30 . The metal shield 34 is made of aluminum or an aluminum alloy. By covering the two signal lines 31 with the metal shield 34, the influence of external noise on the wheel speed sensor cable 30 can be suppressed.

Embodiment 4.
FIG. 5 is a diagram showing the internal configuration of a composite cable 10 according to Embodiment 4 of the present invention. In FIG. 5, the parts denoted by the same reference numerals play the same roles as those described in the first to third embodiments.

The composite cable 10 in the wire harnesses 100 of the first to third embodiments described above is a four-core cable in which the electric brake cable 20 and the wheel speed sensor cable 30 are integrated. The composite cable 10 in the wire harness 100 of Embodiment 4 further has an active damper cable 90 used in an active damper system. The active damper system performs damping control of the dampers of the wheels. Therefore, the active damper cable 90 is connected to a vehicle damper (not shown) to which the wire harness 100 is attached, and a signal from a control device (not shown) is sent to the damper.

As shown in FIG. 5, the active damper cable 90 in the composite cable 10 according to the fourth embodiment consists of two signal lines 91. As shown in FIG. Conductor wire 91 a and insulator 91 b in signal line 91 are the same as conductor wire 31 a and insulator 31 b in signal line 31 of cable 30 for wheel speed sensor. Here, although not shown, the active damper cable 90 has a twisted structure of two signal lines 91 . The active damper cable 90 obtained by twisting the two signal lines 91 is further twisted together with the two brake lines 21 of the electric brake cable 20 and the wheel speed sensor cable 30 to form a twisted wire. In this embodiment, the active damper cable 90 does not have a jacket. As a result, the influence of increasing the cable diameter can be reduced. Further, in the present embodiment, the active damper cable 90 is arranged in the valley between the wheel speed sensor cable 30 and the brake line 21 . The wheel speed sensor cable 30 is thicker than the brake line 21 . Therefore, by arranging the active damper cable 90 in the valley between the wheel speed sensor cable 30 and the brake line 21 like the composite cable 10 of the fourth embodiment, the cable 90 is arranged in the valley between the two brake lines 21. You will be better off than when you did it. Therefore, the composite cable 10 of Embodiment 4 can further stabilize the positional relationship between each cable and the active damper cable 90 . Further, in the composite cable 10 of Embodiment 4, the space formed between the wheel speed sensor cable 30 and the brake line 21 is wider than the space formed between the brake lines 21 and 21 . Therefore, by arranging the active damper cable 90 in the valley between the wheel speed sensor cable 30 and the brake line 21, the influence of the cable diameter increase can be reduced.

Here, in Embodiment 4, the use of the cable integrated with the electric brake cable 20 and the wheel speed sensor cable 30 is for the active damper, but the present invention is not limited to this. do not have. For example, it can also be applied to other cables, signal lines, etc. used for other purposes, such as a cable connected to a brake pad wear sensor (BPWS).

Embodiment 5.
FIG. 6 is a diagram showing the internal configuration of composite cable 10 according to Embodiment 5 of the present invention. In FIG. 6, the parts denoted by the same reference numerals play the same roles as those described in the first to third embodiments.

The composite cable 10 in the wire harness 100 of the first to third embodiments described above is a four-core cable in which the electric brake cable 20 and the WSS cable 30 are integrated. In the composite cable 10 in the wire harness 100 of Embodiment 5, the wheel speed sensor cable 30 has four signal lines 31 .

FIG. 7 is a diagram showing a wire harness 100 according to Embodiment 5 of the present invention. Having four signal lines 31 allows the composite cable 10 of the wire harness 100 to have, for example, two sets of two signal lines 31 . For this reason, it is possible to connect two wheel speed sensors 401 and 402 having ICs 410, thereby providing redundancy to the vehicle control system. Here, the signal line 31 is connected to the wheel speed sensor 401 and the wheel speed sensor 402 via the connector 63, or may be directly connected to the wheel speed sensor 401 and the wheel speed sensor 402. 8, two wheel speed sensors 401 and 402 are connected, but one wheel speed sensor 400 having two ICs 410 may be connected.

REFERENCE SIGNS LIST 10 composite cable 20 electric brake cable 21 brake wire 21a conductor wire 21b insulator 30 wheel speed sensor cable 31 signal wire 31a conductor wire 31b insulator 32 WSS jacket 33 talc powder 34 metal shield 40 holding paper 50 outer jacket 61, 62 , 63, 64 connector 80 grommet 90 active damper cable 91 signal wire 91a conductor wire 91b insulator 100 wire harness 201 first controller 202 second controller 300 braking mechanism 400, 401, 402 wheel speed sensor 410 IC

Claims (7)

An electric brake cable having a brake wire with a conductor wire covered with an insulator and connected to a braking mechanism that suppresses wheel rotation;
a wheel speed sensor cable having a plurality of signal wires in which conductor wires are covered with an insulator and a signal wire jacket in which the plurality of signal wires are covered; ,
a presser wrapping paper wound around a twisted wire obtained by twisting the electric brake cable and the wheel speed sensor cable;
an outer jacket that covers the twisted wire wound with the pressing wrapping paper;
A composite cable in which lubricant is applied to the outer periphery of the signal line jacket of at least the wheel speed sensor cable. 2. The composite cable according to claim 1, wherein the signal line jacket and the outer jacket are made of polyurethane with different hardness. 3. The composite cable of claim 2, wherein said outer jacket is softer than said signal line jacket. 4. The twisting direction of the electric brake cable and the wheel speed sensor cable is the same as the winding direction of the holding paper wrapped around the twisted wire. A composite cable according to claim 1. The electric brake cable and the wheel speed sensor cable are wound around the holding paper and arranged in a valley between the wheel speed sensor cable and the brake line of the electric brake cable. The composite cable according to any one of claims 1 to 4. 6. The composite cable according to claim 5, wherein said separate cable is an active damper cable having a signal line connected to a damper for damping vibration of said wheel and transmitting a signal to said damper. A wire harness comprising the composite cable according to any one of claims 1 to 6.

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