JPH0733756U - Electrical circuit protection device for connected vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the driven circuit of the towed vehicle is short-circuited (short circuit), the main circuit of the towed vehicle can be normally secured. In an electric circuit of a connected vehicle including a connecting cable 4 for connecting a main driving circuit of a towing vehicle 2 and a driven circuit of a towed vehicle 3, the driving circuit of the towing vehicle 2 or the driven circuit of the towed vehicle 3 is individually provided. A fuse 5 is provided to connect to the connector of the connecting cable 4. The fuse 5 may be housed so that each circuit is individually connected in the connecting cable 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a protection device for an electric circuit of an articulated vehicle.

[0002]

[Prior art]

 A fuse disclosed in Japanese Utility Model Laid-Open No. 59-187058 is known as a fuse for protecting an electric circuit of a vehicle. If a short circuit occurs in the driven circuit of the towed vehicle that is connected to the main drive circuit and connected to it by a connecting cable, the fuse on the tow vehicle side will melt down to ensure the safety of the electric circuit. Has become.

[0003]

[Problems to be solved by the device]

 However, if the towed vehicle had a short circuit and the fuse on the towed vehicle was blown, the lamp on the towed vehicle connected to the fuse would not light.

The present invention has been made in consideration of such problems, and an object thereof is to provide a device that can secure the main drive circuit of the towing vehicle even if a short circuit occurs in the driven circuit of the towed vehicle. And

[0005]

[Means for Solving the Problems]

 Therefore, in the first invention, the main circuit of the towing vehicle or the driven circuit of the towed vehicle is individually provided in the electric circuit of the connected vehicle that includes the connecting cable that connects the main circuit of the tow vehicle and the driven circuit of the towed vehicle. Provide a fuse to connect to the connector with the connecting cable.

Further, in the second invention, in an electric circuit of a connecting vehicle including a connecting cable for connecting a main driving circuit of a towing vehicle and a driven circuit of a towed vehicle, the respective circuits are individually connected in the connecting cable. Install the fuse.

[0007]

[Action]

 In the first invention, if an excessive current flows due to a short circuit on the towed vehicle side, the fuse connecting the circuit to the connector for connecting the cable will be blown to ensure the safety of the circuit. Since it is not affected, the lamp operation of the towing vehicle can be maintained normally.

In the second invention, when an overcurrent flows due to a short circuit on the towed vehicle side, the fuse accommodated in the connecting cable is blown, and the fuse of the main drive circuit is not affected by this. The lamp operation of the towing vehicle can be maintained normally.

[0009]

【Example】

 FIG. 1 shows a side surface of a connected vehicle. Each of the ramp circuits is composed of a main drive circuit on the towing vehicle 2 side and a towed vehicle 3 side, and a connecting cable 4 for connecting these is provided. The main drive circuit of the towing vehicle 2 is connected to the power source via the fuses as in the conventional case.

Then, at least one side of the towing vehicle 2 or the towed vehicle 3 is provided with a fuse 5 for connecting a connector (vehicle body side) with the connecting cable 4 to a main driving circuit or a driven circuit. The fuse 5 is arranged between the crocodile-shaped connecting terminals 6a on the wiring board 6 as shown in FIG. Reference numeral 7 denotes an insertion plug connected to a connector with the connecting cable 4. In addition, drawing of the wiring to the main circuit or the driven circuit is omitted.

With this configuration, the switch circuit on the side of the towing vehicle 2 disconnects power from the main drive circuit to the driven circuit via the connection cable 4. That is, the lamp on the towed vehicle 3 side is turned on / off according to the switch operation on the towed vehicle 2 side.

In this case, if an excessive current flows due to a short circuit on the towed vehicle 3 side, the fuse 5 connecting the circuit to the connector with the connecting cable 4 is blown to ensure the safety of the circuit. Since the fuse of is not affected by this, the lamp operation of the towing vehicle 2 can be normally maintained.

FIG. 3 shows another embodiment, in which the fuse 5 is built in the connecting portion 4 a (coupler) of the connecting cable 4. The coupler 4a has a receiving space 9 whose one end is open to the insertion surface with the connector, a connection terminal 8a which receives one end of the fuse 5 in the back thereof, and a fuse which is inserted into the accommodation space 9 from the insertion surface with the connector. A connection terminal 8b for suppressing the other end of 5 is provided. The fuse 5 is accommodated in the coupler 4a between the connection terminals 8a and 8b, and can be freely taken out (replaceable) from the storage space 9 by pulling out the connection terminal 8b.

In this example as well, when an excessive current flows due to a short circuit on the towed vehicle 3 side, the fuse 5 built in the coupler 4a of the connecting cable 4 is blown, and the fuse of the main drive circuit is not affected by this too. The lamp operation of the towing vehicle 2 can be maintained normally. Further, since the fuse 5 is housed in the coupler 4a of the connecting cable 4, there is also an advantage that it is not necessary to secure the installation space on the vehicle body side.

[0015]

[Effect of device]

 In short, according to the present invention, when a fuse is added as described in claim 1 or 2, even if a short circuit occurs in the driven circuit of the towed vehicle, the main drive circuit of the towed vehicle is Can be secured normally.

Further, when the fuse is housed in the connecting cable as in the second aspect, there is an advantage that it is not necessary to secure a space for installing the fuse on the vehicle body side.

[Brief description of drawings]

FIG. 1 is a side view of an articulated vehicle.

FIG. 2 is a diagram showing a mounting state of a fuse.

FIG. 3 is a cross-sectional view of a main part of a connecting cable and a perspective view of a connection terminal.

[Explanation of symbols]

 2 Towing vehicle 3 Towed vehicle 4 Connection cable 4a Coupler 5 Fuse 6 Wiring board

Claims (2)

[Scope of utility model registration request] 1. An electric circuit of a connected vehicle comprising a connecting cable for connecting a main circuit of a tow vehicle and a driven circuit of a towed vehicle, wherein the main circuit of the tow vehicle or the driven circuit of the towed vehicle is individually connected. An electric circuit protection device for a coupled vehicle, characterized in that a fuse for connecting to a connector with a cable is provided. 2. An electric circuit of a connected vehicle comprising a connecting cable for connecting a main driving circuit of a towing vehicle and a driven circuit of a towed vehicle, wherein a fuse for individually connecting each circuit in the connecting cable is installed. An electric circuit protection device for a connected vehicle characterized by the above.