JPH0457550B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electric circuit for a coupled vehicle having a dolly with a power device for supplying power to the coupled vehicle towed by a tractor and a dolly with a power device.

(Prior Art) Conventionally, multi-connected vehicles in which connected vehicles (trailer) are pulled by a tractor have been used for transporting goods and the like. This type of connected vehicle has a plurality of turning points for connection, so a phenomenon similar to a fish tail swinging or jack-knifeing, in which the connection part is hit, occurs while the vehicle is running. In order to prevent these phenomena, a trailer support frame extending near the rear part, a traveling gear member including wheels that slide in the longitudinal direction, and a traveling gear member are installed on the underside of the main body of the connected vehicle, that is, the trailer. Japanese Patent Laid-Open No. 85765/1983 proposes a trailer traveling device equipped with rails and the like to prevent rotational movement.

(Problems to be Solved by the Invention) In the trailer traveling device proposed in the above-mentioned Japanese Patent Application Laid-Open No. 58-85765, since a plurality of connected trailers are towed only by the power of the tractor, the load A tractor with a large output corresponding to the trailer is required, and if the load distribution of the tractor is small relative to the load of the trailer being pulled, there is a risk that the drive wheels of the tractor will spin and become unable to travel.

In addition, when a dolly with a power unit is used to assist the tractor's tractive force, the power load increases for both power units, and when starting, which requires a large amount of power, the battery capacity becomes insufficient. arise. Note that if the power supply circuits on the tractor side and the dolly side are connected in common, the charging generator circuits will be paralleled, and if a significant imbalance occurs, it may cause an unexpected burnout accident.

Furthermore, if a dolly with a power unit is used as a coupled vehicle and is towed only by the power unit on the tractor side without operating the power unit on the dolly side, the torque converter of the power unit on the dolly side will cause reverse drive. There also arises the problem of damage.

The present invention has been made in view of these problems, and its purpose is to have separate power supplies for the tractor side and dolly side that are separated from each other. To provide an electric circuit for a coupled vehicle having a dolly with a power unit, which turns on the power of the dolly and activates a warning device when the power unit on the dolly side is not started.

(Means for Solving the Problem) According to the present invention, the power device is mounted on a dolly disposed between a tractor having a power device and a connected vehicle towed by the tractor, and the power device is mounted on a dolly disposed between a tractor having a power device and a connected vehicle towed by the tractor. The vehicle is equipped with power supplies separated from each other, and includes a means for turning on the power to the dolly by operating a start switch of the tractor's power unit, and a means for issuing a warning when the dolly's power unit is not operating. There is provided a power supply circuit for a coupled vehicle having a powered dolly equipped with a motor vehicle, and a power supply circuit for a coupled vehicle having a powered dolly in which the warning is issued when the parking brake is released.

(Function) Since the present invention has a power unit mounted on a dolly placed between connected vehicles towed by a tractor, the traction force of the tractor can be assisted, and the arrangement of the dolly and the mounted power unit can be adjusted appropriately. This output improves maneuverability and provides stable driving performance.

Further, in the present invention, since the tractor and the dolly are equipped with power supplies that are separated from each other, it is possible to prevent adverse effects caused by mutual coupling, and to reduce problems caused by insufficient power supply capacity.

Furthermore, we have provided a means to turn on the power on the dolly side by operating the key switch on the tractor side engine, making it possible to energize the dolly meter assembly. Since a means for issuing a warning is provided when this is released, the driver is alerted to the problem, thereby preventing a damage accident caused by reverse driving of the transmission of the engine on the dolly side.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a block diagram showing an example of the electrical circuit of a coupled vehicle having a dolly with a power unit according to the present invention, and FIG. 2 is an explanatory diagram showing an example of a triple coupled vehicle.

In FIG. 2, reference numeral 1 denotes a tractor equipped with a power unit, which is positioned at the head of a connected vehicle and pulls a plurality of trailing trailers. Wheels 1a indicated by double circles indicate driving wheels driven by a power device. 2 is a first trailer towed by a tractor, and a first dolly 3 is connected to the rear. The first dolly 3 is equipped with an engine 31 that assists the tractive force of the tractor 1, and drives wheels 3b via a torque converter-equipped transmission 3a. The second trailer 4 connected to the rear and the third trailer 6 connected via the second dolly 5 are pulled, thereby assisting the traction force of the tractor 1.

Note that the output of the engine 31 mounted on the first dolly 3 is smaller than the output of the power plant of the tractor 1. For example, when the power plant output of the tractor 1 is 510 horsepower, the power plant output of the first dolly is The horsepower is 330, and the output ratio is about 6:4.The first dolly 3 is placed forward from the center of the connected vehicle, as shown in Figure 2. This prevents the pushing up caused by the driving force of the power device of the first dolly 3 and the jack knife phenomenon of the connecting portion.

In FIG. 1, 11 is an engine mounted on the tractor 1, and has a starter 11a. Key switch 1 installed in the driver's seat of tractor 1
2, power is supplied from the battery 13 on the tractor 1 side to the starter 11a via the S inspection switch 32, and the engine 11 starts operating. The S inspection switch 32 is housed in an inspection box 3c provided on the first dolly 3, and the circuit is normally closed. When the door of the inspection box 3c is opened during inspection work on the first dolly 3, the S inspection switch 32 is installed. The switch 32 is turned off and the engine 11 is configured not to start even if the key switch 12 provided on the tractor 1 is turned on.

The key switch 14 is a switch provided on the tractor 1 and operates the engine 31 mounted on the first dolly 3. When the key switch 14 is turned on, power is supplied from the battery 33 provided on the first dolly 3 via the power changeover switch 34. Then, power is supplied to the starter 31a provided in the engine 31, and the engine 31 starts operating. The power changeover switch 34 is housed in the inspection box 3c, and when the door is opened during inspection work, the circuit from the battery 33 is switched to the key switch 35 side, which will be described later, but is normally connected to the circuit on the key switch 14 side.

The key switch 35 is provided on the first dolly 3,
This is a switch that operates the engine 31 for inspection, and it opens the door of the inspection box 3c and switches the power selector switch 34 to the key switch 35 side.
The engine 31 is operated for inspection.

15 is a controller which inputs signals from various sensors provided on the tractor 1 side and the first dolly 3 side, although not shown, and outputs control signals to various actuators. and,
When transmitting and receiving these input/output signals, a photocoupler and an insulating amplifier are used inside the controller 15, and a configuration is used in which the signals are passed, but the tractor 1 side and the first dolly 3 side are separated from each other in terms of power. The power supply for the controller 15 is supplied from the battery 13 to the C inspection switch 3 housed in the inspection box 3c.
6, and when the door is opened during inspection, the supply is cut off to prevent malfunction of the controller 15 due to abnormal input during inspection.

16 is a meter assembly installed in the driver's seat of the tractor 1;
Operating meters and warning lights related to the engine 31 are installed. The meter assembly 16 is powered from the battery 33, and is normally powered by the power selector switch 3.
The power is supplied from the key switch 14 via the power source 4, and the power source is supplied from the key switch 35 because the power changeover switch 34 is switched during inspection.

However, on the tractor 1 side, the key switch 12 for the engine 11 is not operated without operating the key switch 14.
By operating the relay 37, the contact 37 is activated.
a is closed and electricity can be applied to the meter assembly 16. In this case, since the engine 31 of the first dolly 3 does not start, the warning light 16 provided on the meter assembly 16 is activated by the oil pressure and charging warning signal.
The voltage of the battery 33 is applied to a, and the voltage is also applied to the alarm buzzer 16b connected in parallel to the warning light 16a.

17 is a parking relay, and when a parking lever (not shown) provided on the tractor 1 is operated to release the parking brake, the parking switch 18 becomes an open circuit, and the parking relay 1
7 loses its suction force and closes the contact 17a. Therefore, the driver
If the parking brake is released for a starting operation without knowing that the vehicle 1 is in a stopped state, the parking switch 18 and the parking relay 17 are activated and the alarm buzzer 16b issues an alarm.

Next, the operation of this embodiment having such a configuration will be explained.

In FIG. 2, the traction force that drives the connected vehicle is not only the traction force of the tractor 1 but also the traction force of the first dolly 3.
The traction force from the engine 31 is also applied to cause the connected vehicle to travel. In addition, tractor 1 and first dolly 3
Since the output ratio of the power plant and the position of the first dolly 3 in the connected vehicle are appropriately selected,
The connected vehicles run stably.

In FIG. 1, the battery 13 on the tractor 1 side
The engine 11, controller 15 and relay 3
7 to operate each, but there is no common circuit with the battery 33 on the first dolly 3 side, and the circuit on the ground side is also wired separately, so there is a power generator for charging (not shown). The circuits of the machines also become unrelated to each other, and adverse effects between them can be prevented.

By operating the key switch 12 on the tractor 1 side, the relay 37 is activated except during inspection work, and the first
The meter assembly 16 of the dolly 3 can be energized, but if the engine 31 is not operating, voltage is applied to the warning light 16a and warning buzzer b. When the parking brake is released, the parking switch 18 is turned off and the parking relay 17 is activated, which activates the warning light 16a and warning buzzer 16b to issue a warning and notify the driver that the engine 31 has stopped. Let me know.

Although the present invention has been described by way of one embodiment, various modifications can be made within the scope of the gist of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) As explained in detail above, the present invention uses an engine mounted on the dolly to pull the connected vehicles in addition to the traction force of the leading tractor, so a particularly high-output tractor is not required and the load distribution is improved. It is possible to prevent the idling of the tractor drive wheels due to inadequacy, and furthermore, by arranging the dolly mounted on the engine and setting the engine to an appropriate output, it is possible to stabilize the traveling performance of the connected vehicle and improve the steering stability.

Furthermore, the present invention is equipped with separate power supplies for the tractor and dolly, and their circuits are also separated from each other, reducing the risk of insufficient power supply capacity even when a large amount of power is required to start the engine. Since there is no need to connect charging generators in parallel, failures due to unexpected accidents can be prevented.

Note that the power on the dolly side can be turned on by operating the key switch of the engine on the tractor side, and the meter assembly provided on the dolly can be energized. If the parking brake is released when the dori's engine is not rotating, the parking switch and parking relay will be activated, and the warning light and buzzer will be activated to warn the driver. This has the effect of preventing damage caused by driving the transmission in reverse.

Further, according to the present invention, since the power to the controller is turned off during inspection work on the dolly side, it is possible to prevent erroneous commands from the controller issued by abnormal signals during inspection work.

[Brief explanation of the drawing]

FIG. 1 is a structural block diagram showing one embodiment of an electric circuit of a coupled vehicle having a dolly with a power unit according to the present invention, and FIG. 2 is an explanatory diagram showing an example of a triple coupled vehicle. 1...Tractor, 3...1st dolly, 11...
Engine, 12...key switch, 13...battery, 16...meter assembly (meter assembly), 16a...warning light, 16b...warning buzzer,
17... Parking relay, 18... Parking switch, 31... Engine, 33... Battery, 37... Relay.

Claims (1)

[Scope of Claims] 1. The power device is mounted on a dolly disposed between a tractor having a power device and a connected vehicle towed by the tractor, and the tractor and the dolly are supplied with separate power supplies. A power source characterized in that it is equipped with means for turning on the power of the dolly by operating a start switch of the power device of the tractor, and a means for issuing a warning when the power device of the dolly is not operating. Electrical circuit of a coupled vehicle with a dolly with device. 2. The electrical circuit for a coupled vehicle having a dolly with a power unit according to claim 1, wherein the warning is issued when the parking brake is released.