JP7439871B2 - Composite harness for vehicle - Google Patents

Description

The present invention relates to a composite harness for a vehicle.

2. Description of the Related Art ABS sensors used in ABS (Anti-lock Brake System) of vehicles have been known. The ABS sensor measures the rotational speed of a wheel, and its sensor section (sensor head) is provided near the wheel. A sensor section provided near the wheel and a control device (electronic control unit) provided on the vehicle body are connected by an ABS sensor cable.

Incidentally, in recent years, electric brakes that control the brakes using electricity instead of hydraulic pressure have become popular. Note that an electric parking brake (EPB), which is an electric parking brake, is also known, but in this specification, this electric parking brake is also included in the electric brake. In an electric brake, a brake caliper (actuator) provided on a wheel and a control device provided on a vehicle body are connected by an electric brake cable (for example, see Patent Document 1).

Japanese Patent Application Publication No. 2003-92028

However, conventionally, the ABS sensor cable and the electric brake cable have been routed separately even though their connection destinations are at approximately the same location. Improvements are desired because wiring space in vehicles is limited and wiring work is complicated.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a composite harness for a vehicle that can effectively utilize the wiring space of a vehicle and facilitate wiring work.

The present invention was created to achieve the above object, and is a composite harness for a vehicle that is wired from a vehicle body to a wheel, and includes a plurality of power sources including a center conductor and an insulator covering the center conductor. ABS (anti-lock braking system), in which a plurality of signal wires each having a diameter smaller than the plurality of power supply wires are covered with an inner sheath made of thermoplastic resin. ) A sensor cable, and an outer sheath made of thermoplastic resin that covers the plurality of power supply lines and the ABS sensor cable, the inner sheath being inserted between the plurality of signal lines, The inner sheath is a composite harness for a vehicle that is in contact with the plurality of power supply lines.

A separator that covers the plurality of power supply lines and the ABS sensor cable is provided between the plurality of power supply lines and the ABS sensor cable and the external sheath, and the separator is made of paper, nonwoven fabric, or It may be made of resin tape.

The plurality of power supply lines may be in contact with each other, and the plurality of signal lines may be in contact with each other.

The outer sheath may be made of thermoplastic urethane, and a fixing fitting may be attached to the outer periphery of the outer sheath via EPDM (ethylene propylene diene rubber) provided in a part of the longitudinal direction of the outer sheath. good.

The plurality of power supply wires extend from the end of the outer sheath with a protective material provided therearound, and the ABS sensor cable extends from the end of the outer sheath to the plurality of signal wires. In the state covered by the inner sheath, the plurality of power supply wires extend longer than the length extending from the end of the outer sheath, and the end of the ABS sensor cable includes: A sensor head may also be provided.

The outer sheath may be an extrusion molded body.

According to the present invention, it is possible to provide a composite harness for a vehicle that can effectively utilize the wiring space of a vehicle and facilitate wiring work.

1A and 1B are diagrams showing a composite harness according to an embodiment of the present invention, in which (a) is a plan view and (b) is a sectional view taken along the line 1B-1B. FIG. 7 is a sectional view of a composite harness according to another embodiment of the present invention. (a) and (b) are sectional views of a composite harness according to another embodiment of the present invention. It is a figure which shows the composite harness based on the example of a modification of this invention, (a) is a top view, (b) is the 4B-4B sectional view.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a diagram showing a composite harness according to the present embodiment, in which (a) is a plan view and (b) is a sectional view taken along the line 1B-1B.

As shown in FIGS. 1(a) and 1(b), the composite harness 1 includes a composite cable 5 that integrates an electric brake cable 2 and an ABS sensor cable 3 by covering them with a common external sheath 4. It is something. Furthermore, the composite harness 1 branches an electric brake cable 2 and an ABS sensor cable 3 at the end of the composite cable 5, and has a connector 6 for connection at at least one end of both cables 2, 3. It is configured by providing.

The electric brake cable 2 consists of two power supply lines 7, and is mainly used to prevent wheel rotation by pressing a predetermined button after the vehicle has stopped (electric parking brake (EPB) mechanism). It is used as a conductive path through which current flows in order to function. Further, as the electric brake cable 2, it is also possible to use a normal electric brake cable other than an electric parking brake (EPB) (for example, one that includes a control signal line in addition to the two power lines 7). possible.

The power supply line 7 is constructed by covering the center conductor 7a with an insulator 7b. The insulator 7b is made of, for example, XLPE (crosslinked polyethylene), ETFE (tetrafluoroethylene-ethylene copolymer), or the like. Normally, in the electric brake cable 2, the two power wires 7 are covered with a sheath, but in the present invention, a common outer sheath 4 is used in place of this sheath.

Note that in this embodiment, the composite cable 5 is defined as one in which the electric brake cable 2 and the ABS sensor cable 3 are covered with a common external sheath 4 and integrated. can also be said to mean that the ABS sensor cable 3 is embedded and integrated into the sheath (external sheath 4) of the electric brake cable 2.

Two power wires 7 of the electric brake cable 2 are extended from both ends of the composite cable 5, and one end thereof is provided with a connector 6a connected to a brake caliper (not shown). A connector 6b connected to a control device (not shown) is provided at the other end. A protective material 8 made of a tube, a hose, etc. is provided around the two power wires 7 extending from the composite cable 5 in order to protect the power wires 7 from chipping caused by flying stones.

The ABS sensor cable 3 is constructed by covering two signal lines 9 with an internal sheath 10. The signal line 9 is constructed by covering the center conductor 9a with an insulator 9b. The insulator 9b is made of, for example, XLPE. In this embodiment, the ABS sensor cable 3 and the power line 7 are provided in contact with each other.

In this embodiment, the outer sheath 4 is made of a thermoplastic resin, more specifically, a thermoplastic urethane, and the inner sheath 10 is made of a crosslinked thermoplastic resin, more specifically, a crosslinked thermoplastic urethane. As shown in FIG. 1, the external sheath 4 is provided on the power line 7 and the ABS sensor cable 3 so as to be interposed between the power line 7 and the ABS sensor cable 3. The outer sheath 4 is formed by extrusion molding, but by crosslinking the inner sheath 10, when forming the outer sheath 4 around the inner sheath 10 (extrusion molding), the inner sheath 10 can be melted by heat. This can reduce the possibility that the inner sheath 10 and the outer sheath 4 will be welded together. As a result, it becomes possible to easily separate and take out the ABS sensor cable 3 from the outer sheath 4 at the end of the composite cable 5.

The thermoplastic urethane used for the outer sheath 4 and the inner sheath 10 has characteristics that are resistant to chipping caused by flying stones, etc., so it is There is no need to cover the area around the exposed ABS sensor cable 3 with a protective material. Furthermore, thermoplastic urethane has the property of being easily bent, and is suitable for the composite harness 1 that is used for wiring under a spring and is repeatedly bent.

Further, in this embodiment, the inner sheath 10 is made of cross-linked thermoplastic urethane added with a silane coupling agent, and one end of the ABS sensor cable 3 is molded with a resin to form the sensor part of the ABS sensor. (Sensor head) 11 is integrated. Nylon was used as the resin mold. The other end of the ABS sensor cable 3 is provided with a connector 6c connected to a control device (not shown).

When thermoplastic urethane is crosslinked, it becomes impossible to ensure adhesion to the resin mold (in this case, nylon), but by performing crosslinking treatment after adding a silane coupling agent to thermoplastic urethane, the silane coupling agent can be activated. , it becomes possible to improve the adhesion to the resin mold. As a result, it is possible to ensure close contact between the inner sheath 10 and the sensor section 11, and it is possible to reduce moisture from entering the sensor section 11. This makes it possible to reduce problems such as failure of the sensor section 11.

A grommet 12 is attached to the composite cable 5 for fixing a fixture for attaching the composite cable 5 to the vehicle body. The grommet 12 is made of, for example, EPDM (ethylene propylene diene rubber). When attaching the grommet 12 to the composite cable 5, the inner diameter of the grommet 12 is expanded using air, but at this time, attachment is difficult unless the surface of the outer sheath 4 of the composite cable 5 is flat. Therefore, in this embodiment, by repeating extrusion molding twice to form the outer sheath 4, the surface of the outer sheath 4 is made flat, and the outer shape of the composite cable 5 is formed to be substantially constant.

The operation of this embodiment will be explained.

The composite harness 1 according to the present embodiment includes a composite cable 5 in which an electric brake cable 2 and an ABS sensor cable 3 are covered with a common external sheath 4 and integrated.

Thereby, the electric brake cable 2 and the ABS sensor cable 3 are integrated, so that the wiring space of the vehicle can be used effectively and the wiring work can be facilitated. Furthermore, since the number of wiring components can be reduced, management becomes easier.

Further, in this embodiment, the ABS sensor cable 3 is constructed by covering two signal lines 9 with an inner sheath 10, the outer sheath 4 is made of thermoplastic resin, and the inner sheath 10 is made of cross-linked thermoplastic resin. It consists of

As a result, it is possible to reduce the possibility that the inner sheath 10 is melted by heat during the formation of the outer sheath 4 (during extrusion molding) and the outer sheath 4 and the inner sheath 10 are welded. The ABS sensor cable 3 can be easily separated and taken out from the sheath 4.

Further, in this embodiment, the inner sheath 10 is made of thermoplastic urethane with a silane coupling agent added, and the sensor part 11 of the ABS sensor is integrated with one end of the ABS sensor cable 3 by resin molding. It has become

Thereby, it becomes possible to integrate the inner sheath 10 and the resin mold in an airtight manner, and it is possible to reduce failures of the sensor section 11 due to moisture intrusion. Further, by integrally providing the sensor section 11 at the end of the ABS sensor cable 3, it is possible to further reduce the number of wiring components and to make wiring work easier.
Further, the electric brake cable 2 is used as a conductive path through which a current is passed to activate the parking brake mechanism by pressing a predetermined button after the vehicle has stopped. Therefore, it is not necessary to take measures against noise from the electric brake cable 2 for the ABS sensor cable 3, which functions while the vehicle is running. Therefore, it is possible to integrate the electric brake cable 2 and the ABS sensor cable 3 without providing a shield for noise prevention to at least one of the electric brake cable 2 and the ABS sensor cable 3.

Next, another embodiment of the present invention will be described.

The composite harness 21 shown in FIG. 2 is the composite harness 1 shown in FIG. be.

By providing the separator 22, even if both the outer sheath 4 and the inner sheath 10 are made of thermoplastic urethane, the ABS sensor cable 3 can be easily separated and taken out from the outer sheath 4 at the end of the composite cable 5. becomes possible.

Furthermore, if the separator 22 is made of metal and is provided so as to cover the ABS sensor cable 3, the separator 22 serves as a shield, and the signal line 9 of the ABS sensor cable 3 is connected to the signal line 9 from the outside. It becomes possible to reduce mixed noise. Note that the material of the separator 22 is not limited to this, and it is also possible to use, for example, nonwoven paper, nonwoven fabric (for example, made of PET), resin tape, etc.

Composite harnesses 31 and 32 shown in FIGS. 3A and 3B are the composite harness 1 of FIG. 1 in which a shield conductor 33 is provided to cover the power line 7 of the electric brake cable 2. 3(a) shows a case where the shield conductor 33 is provided so as to cover the entire two power wires 7 and the ABS sensor cable 3, and FIG. 3(b) shows only the two power wires 7. Although the case where the shield conductor 33 is provided so as to cover the is shown, either structure may be adopted. Further, the shield conductor 33 may be provided so as to cover only the ABS sensor cable 3. When the shield conductor 33 is provided to cover the entirety of the power line 7 and the ABS sensor cable 3 as shown in FIG. , an inclusion 34 is inserted. As shown in FIG. 3(b), by providing the shield conductor 33 so as to cover only the two power supply lines 7, the electric brake cable 2 can be connected not only after the vehicle has stopped, but also while the vehicle is running. Even if it is used to flow a current to reduce the speed, it is possible to reduce noise to the ABS sensor cable 3, which functions while the vehicle is running. As a result, the electric brake cable 2 can be used not only after the vehicle has stopped, but also when the electric brake cable 2 is used to flow a current to reduce the speed of the vehicle while the vehicle is running. and the ABS sensor cable 3 can be integrated.

By providing the shield conductor 33, it becomes possible to suppress radiation noise from the power supply line 7 and take measures against EMI (electromagnetic interference). In addition, by providing the shield conductor 33, the shield conductor 33 plays the role of a separator separating the outer sheath 4 and the inner sheath 10, and reduces welding of the outer sheath 4 and the inner sheath 10, thereby reducing the possibility of welding between the power line 7 and the ABS sensor cable. It becomes possible to make the branching of 3 easy.

Furthermore, in place of the shield conductor 33 in FIG. 3(a), it is also possible to provide nonwoven paper, nonwoven fabric (for example, made of PET), resin tape, or the like. By providing nonwoven paper or nonwoven fabric in place of the shield conductor 33, welding between the outer sheath 4 and the inner sheath 10 can be reduced, and at the same time, friction between the power line 7 or the ABS sensor cable 3 and the outer sheath 4 can be reduced. It becomes possible to make the power line 7 and the ABS sensor cable 3 easier to move (slip) within the outer sheath 4, and it is also possible to reduce stress due to bending and improve bending durability.

It goes without saying that the present invention is not limited to the embodiments described above, and that various changes can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the ABS sensor cable 3 is constructed by covering the two signal lines 9 with the inner sheath 10, but as shown in FIGS. 4(a) and 4(b), the inner sheath It is also possible to omit 10. In this case, since the signal line 9 is extended from the end of the composite cable 5, this exposed part of the signal line 9 is protected with a tube, hose, etc. to prevent chipping caused by flying stones. It is necessary to provide the material 42. Further, in this case, the adhesion of the resin mold (for example, nylon) to the insulator 9b (for example, XLPE) of the signal line 9 is not good, so the sensor section 11 cannot be integrated with the resin mold. Therefore, the connector 43 may be provided at one end of the signal line 9 and the signal line 9 may be configured to be connected to the sensor section 11 with the connector.

Further, although not mentioned in the above embodiment, the electric brake cable 2 may also have a structure covered with an internal sheath similarly to the ABS sensor cable 3. In this case, it is preferable to use cross-linked thermoplastic urethane for the inner sheath or to interpose a separator between the inner sheath and the outer sheath 4 so as not to weld with the outer sheath 4. This makes it possible to omit the protective material 8, making wiring work easier.

Further, in the above embodiment, a case has been described in which the outer sheath 4 is formed of thermoplastic urethane, but the present invention is not limited to this, and the outer sheath 4 may be formed of EPDM. Since EPDM is less susceptible to compression set (creep), by forming the outer sheath 4 with EPDM, it is possible to directly fix the fixing metal fittings to the outer sheath 4 without attaching the grommet 12, which reduces wiring work. It becomes possible to do it more easily. In addition, since thermoplastic urethane is prone to compression permanent deformation (creep), the fixing fittings cannot be directly fixed, and the grommet 12 is essential.

Furthermore, although not mentioned in the above embodiment, in addition to the electric brake cable 2 and the ABS sensor cable 3, it is of course possible to integrate another insulated wire such as a disconnection detection wire.

1 Composite harness 2 Electric brake cable 3 ABS sensor cable 4 External sheath 5 Composite cable 6 Connector 7 Power line 8 Protective material 9 Signal line 10 Internal sheath 11 Sensor section

Claims (4)

A plurality of power supply lines for an electric brake or an electric parking brake including a first center conductor and a first insulator covering the first center conductor;
A second central conductor and a second insulator covering the second central conductor, the plurality of signal wires having a smaller cross-sectional area than the plurality of power supply wires and in contact with each other have an inner sheath made of thermoplastic resin. ABS (anti-lock brake system) sensor cable coated with
a separator made of paper, nonwoven fabric, or resin tape that collectively covers the plurality of power supply lines and the ABS sensor cable;
an outer sheath covering the separator;
Equipped with
The inner sheath is inserted between the plurality of signal lines and is in contact with the plurality of power supply lines,
The plurality of power supply wires extend from an end of the outer sheath,
The ABS sensor cable extends from an end of the outer sheath with the plurality of signal lines covered with the inner sheath,
A connector connected to the electric brake or the electric parking brake is provided at one end of the plurality of power supply lines , spaced apart from the end of the outer sheath ,
A composite harness for a vehicle, wherein a sensor head is provided at one end of the ABS sensor cable separately from the connector and spaced apart from the end of the external sheath . The composite harness for a vehicle according to claim 1, wherein the plurality of power supply lines are in contact with each other. The first center conductor has a larger cross-sectional area than the second center conductor,
The composite harness for a vehicle according to claim 1 or 2, wherein the first insulator is thicker than the second insulator. The composite harness for a vehicle according to any one of claims 1 to 3, wherein a portion of the plurality of power supply lines extending from an end of the outer sheath is protected by a protective material.