JPS6346946A - Earth structure for vehicle equipped with synthetic resin-made car body - Google Patents

Abstract

PURPOSE:To reduce a cost and to easily perform connection work, by providing a connection seat to be formed into an earth member so that it can be connected with and disconnected from a lead wire from car-mounted electrical equipment parts. CONSTITUTION:A battery 9 is mounted to the bottom of a rear seat 4c in a bottom body 4, and a negative electrode of the battery 9 is connected with a forward path 7a of a cooling water pipe 7 by an earth wire 13a. While a speedometer 8a, car radio 8b, head lamps 8c, front directional indicator lamps 8d and cooling fans 8e of electrical equipment parts are mounted to the front part of the bottom body 4, and their negative side terminals are connected with a connection bracket, formed in the forward path 7a or a return path 7b of the pipe 7, by a lead wire 13b. In this way, the necessity for providing an earth member for exclusive use is eliminated because the cooling pipe 7 is used serving also for the earth member, further connection work can be easily performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grounding structure for connecting a battery cathode and on-vehicle electrical components in a vehicle equipped with a synthetic resin body, and particularly to simplifying the structure and reducing costs. Regarding reduction.

[Conventional technology]

Conventionally, in a vehicle equipped with a sheet metal body, the grounding structure for connecting the cathode of the battery and the electrical components has been constructed by connecting the cathode of the battery to the vehicle body and connecting the cathode of the battery to the vehicle body and each electrical component, since the vehicle body itself is conductive. It is common to connect it with other products.

By the way, recently there are vehicles equipped with body parts that are integrally molded using synthetic resins such as fiber-reinforced resin (hereinafter referred to as FRP), but synthetic resins are generally electrical insulators, so vehicles equipped with the above-mentioned sheet metal body are available. It is not possible to use the same grounding structure as the vehicle. Therefore, in a vehicle equipped with a synthetic resin body, for example, as shown in FIG. The headlight 15a and the cooling 7y are connected to the headlight 15a and the cooling 7y by the branch ground wire of the branch harness 14, which is connected to the headlight 15a and the cooling 7y.
A grounding structure has been considered in which the grounding structure is connected to each electrical component such as the speedometer 715b, the speedometer 15c, and the car radio 15d.

[Problem that the invention seeks to solve]

However, when placing a ground wire inside the harness, it may be difficult to make the diameter of the ground wire commensurate with the ground capacity due to restrictions on the caulking structure between the cover used and the ground wire. .

In such cases, it is necessary to place multiple ground wires within the harness, but as the number of ground wires increases, the harness diameter becomes thicker, making wiring difficult and contributing to increased costs. becomes.

In addition, when connecting the ground wire to each electrical component, the ground wire connection work becomes complicated, such as by peeling off the insulation coating of the ground wire, connecting the branch ground wire here, and then taping the part. There are also points.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a grounding structure for a vehicle equipped with a synthetic resin vehicle body, which allows the grounding wire connection work to be performed in a timely manner and to suppress an increase in cost.

[Means for solving problems]

The present invention provides a vehicle equipped with a synthetic resin vehicle body, in which a conductive grounding member 6 connected to a battery extends in the longitudinal direction of the vehicle, a plurality of connection seats are formed at appropriate locations on the grounding member, and the connection seats This is a grounding structure characterized by detachably connecting the lead wire from the in-vehicle electrical component.

Here, the grounding member in the present invention can of course be realized by a dedicated grounding member such as a metal band plate or a conductive resin band plate, but is not limited to this, for example, a metal cooling water pipe connecting an engine and a radiator, Conductive members conventionally arranged in the longitudinal direction of the vehicle, such as metal brake oil pipes connecting the mask cylinder and the front and rear wheels, can also be used as the ground member. Furthermore, in the present invention, the meaning of connecting the grounding member to the battery includes not only the case where the grounding member is directly connected to the battery, but also the case where the grounding member is connected via the engine, for example.

[Effect]

In the grounding structure according to the present invention, the battery and each electrical component are connected by a grounding member that has a simple shape such as a metal strip and can easily secure sufficient grounding capacity. The grounding structure is simpler than a structure using wires, and cost increases can be suppressed. In this case, if a metal cooling water pipe that has been conventionally provided in a vehicle is also used as a grounding member, no new grounding member is required, which further simplifies the structure and reduces costs.

Furthermore, the connection between the ground member and the lead wire from the electrical component can be achieved by simply connecting the connection terminal of the lead wire to the connection seat of the ground member with a bolt or the like, making the connection work easy.

(Example〕 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are diagrams for explaining a grounding structure according to an embodiment of the present invention, and this embodiment is an example in which a metal cooling water pipe is used as a grounding member.

In the figure, reference numeral 1 indicates an automobile to which the structure of this embodiment is applied, and a body 2 of the automobile 1 is composed of an upper ice-making section body 3 and a body 4 made of FRP.

An engine 5 is mounted below the rear end of the lower body 4, and a radiator 6 is mounted on the front end of the lower body 4 for cooling the cooling water of the engine 5 with the running wind. are connected to each other by a metal cooling water pipe 7. The outward path 7a of the cooling water pipe 7 passes through the right side sill 4a formed in a double-walled manner on the right side of the lower body 4, and the return path 7b passes through the left side temple 4b on the left side, at the front and rear of the vehicle. It is piped in the direction.

Further, a battery 9 is mounted below the rear seat 4c of the lower body 4, and the cathode of the battery 9 is connected to the ground and
5113a, it is connected to the outgoing path 7a of the cooling water distribution 97. As a result, the cooling water pipe 7 serves as a grounding member disposed in the longitudinal direction of the vehicle. Further, although not shown, a connection bracket for connecting a lead wire, which will be described later, is formed at a suitable location on the cooling water pipe 7, and a connection bolt hole is formed in the bracket.

At the front of the lower body 4 are a speedometer 8a, a car radio 8b, a headlamp 8c, and a forward direction indicator light 13d.

Electrical components such as a cooling fan 8e are mounted, and the negative side terminals of each of the electrical components 8a to 8e are connected to a connection bracket formed on the outgoing path 7a or the incoming path 7b of the cooling water pipe 7 by a lead wire 13b. ing. This lead wire 13
The connection terminal b is bolted and fixed to the connection bracket.

Next, the effects of this embodiment will be explained.

In the structure of this embodiment, the cooling water pipe 7 that circulates cooling water from the engine 5 to and from the radiator 6 functions as a grounding member extending in the longitudinal direction of the vehicle. That is, the negative terminals of each of the electrical components 8a to 8e are electrically connected to the cathode of the battery 9 via the cooling water pipe 7 and the engine 5, thereby ensuring a grounding structure for each of the electrical components 8a to 8e. ing. Moreover, in this case, in this embodiment, the conventionally arranged cooling water pipe 7 is also used as a grounding member, so a dedicated grounding member is not required, and compared to the above-mentioned structure in which multiple grounding wires are arranged, The structure is greatly simplified and costs can be reduced accordingly.

In addition, the lead wire 13b and the cooling bra h-
The connection with the dousui pipe 7 is made by bolting through the connection cable, and the connection work is performed by the above-mentioned insulating coating f.
f1l+ 11 , it is much easier than when taping is required.

In the above embodiment, the outgoing path 7a of the cooling water pipe 7.

The return route 7b has been placed separately on the left and right, but of course is the return route 7b on the left or right? In addition, in the above embodiment, the cooling water piping was also used as the ground member, but it is not limited to the cooling water piping, and may be a brake oil piping, for example.

Furthermore, in the present invention, it is not always necessary to use the cooling water pipe etc. as the grounding member.
As shown by the lines, a dedicated grounding member 17 made of a metal or conductive resin band plate or the like, with connection seats formed at appropriate positions by burring or the like, is placed inside the side sill 4a on the side of the vehicle, etc. The use of such a dedicated ground member 17, which may be mechanically connected to the vehicle body by adhesive or rivets, is advantageous in that the necessary electrical capacity can be easily secured with a simple shape. be.

[Effects of the Invention] As described above, according to the grounding structure for a vehicle equipped with a synthetic resin car body according to the present invention, the conductive grounding member connected to the cathode of the battery is arranged in the longitudinal direction of the vehicle, and Since the lead wires from the negative terminals of each electrical component are connected to the ground connection seat, the structure can be simplified and costs can be reduced compared to a ground structure with multiple ground wires. 4. It also has the effect of making connection work easier.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining a grounding structure according to an embodiment of the present invention, in which FIG. 1 is a side view thereof, FIG. 2 is a sectional front view thereof, and FIG. 3 is a plan view thereof. , FIG. 4 is a plan view showing a conventional grounding structure. In the figure, 1 is a car, 2 is a synthetic resin car body, 5 is an engine, 6 is a radiator, 7 is a cooling water pipe (ground member), 83 to 8e are electrical components, 9 is a battery, +3b is a lead wire, and F is a It is a grounding member.

Claims (2)

[Claims] (1) In a vehicle equipped with a body integrally molded using synthetic resin, a grounding structure connects the cathode of the battery and the on-vehicle electrical components, one end of which is connected to the cathode of the battery, and A conductive grounding member extending between the front part and the rear part is provided, a plurality of connection seats are formed on the grounding member, and the lead wire from the negative terminal of each electrical component can be freely attached and detached from the connection seats. An earthing structure for a vehicle equipped with a synthetic resin body characterized by a connection. (2) The synthetic resin according to claim 1, wherein the ground member is a metal cooling water pipe that communicates between the engine mounted at the rear of the vehicle body and the radiator mounted at the front. Earthing structure for vehicles with manufactured car bodies.