JPH05199617A - Remote control reversal unit for electric automobile - Google Patents

Abstract

PURPOSE:To facilitate reversal approaching work at the time of parking or loading/unloading of cargo by disposing a remote operating unit for micro speed reversal in the vicinity of the rear of a vehicle thereby realizing micro speed reversal/stop motion. CONSTITUTION:When an operator makes a switch to remote control reversal mode in the cabin, a controller 301 applies brake on a vehicle through a brake mechanism 304 to lock the vehicle. The controller 301 then locks a steering mechanism through a steering lock mechanism 303 thus limiting the behavior of the vehicle at the time of remote control reversal operation. The operator then leaves the cabin and moves to the rear of the vehicle where the operator performs remote reversal operation based on a command delivered from a remote operation commander 305 disposed on the rear of the vehicle. In other words, when a micro speed reverse switch on the remote operation commander 305 is depressed, the brake mechanism 304 is released so long as the micro speed switch is depressed and a motor drive signal 309 is delivered from the controller 301 thus reversing the vehicle at a micro speed. Since micro speed reversal can be carried out while vidually confirming safety on the rear of the vehicle, accident can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control retraction device for an electric vehicle.

[0002]

2. Description of the Related Art A conventional vehicle has a driver's seat in the front part of the vehicle and requires a rear-view mirror, a rear-viewing video camera, or leaning back to check the rear when the vehicle moves backward.

[0003]

However, there are many blind spots in the rearview mirror / rear view, and it takes time to get used to it because the rear surveillance video camera uses an image with a wide-angle lens. Furthermore, due to the blind spot, accidents involving children etc. at the time of retreat are also frequent.

Therefore, the present invention takes advantage of the controllability of an electric vehicle at low speeds, enables a slow reverse / stop operation by a reverse operating device near the rear of the vehicle, and provides a reverse width for parking / loading / unloading cargo. Makes gathering work easier.

[0005]

In a large-sized freight electric vehicle equipped with an obstacle sensor mounted on the vehicle, a vehicle speed detector, a steering fixing mechanism, and an electrically controllable braking mechanism, a small speed is provided near the rear of the vehicle. The remote control device for retreating is provided, and the retreating operation is possible from other than the driver's seat.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall view of an electric vehicle equipped with this device, FIG. 2 is an explanatory view of a remote control command device, FIG. 3 is a control system diagram of this device, and FIG. 4 is a normal driving operation and remote control retraction. FIG. 5 is a flow chart showing the procedure for switching the operation, and FIG. 5 is a generation logic circuit diagram of the motor drive command signal.

As shown in FIG. 1, using the present invention,
When the large electric vehicle for freight retreats, the driver 102
Moves to the rear of the vehicle 101, and the backward movement is possible while visually confirming the safety and the vehicle position.

As shown in FIG. 2, the remote control command device 20 is provided.
1 includes a key switch 204 and a slow speed reverse switch 20.
2. A fine speed forward switch 203 is provided. The key switch 204 is provided for the purpose of preventing operation by a third party other than the driver. The slow speed reverse switch 202 and the slow speed forward switch 203 are push button switches, which perform a predetermined operation while the operator is pressing the switch, and when the operator's hand is released, immediately stop the operation and brake the vehicle. To stop the behavior of the vehicle.

In order to perform the remote control backward operation, the operation mode is switched at the driver's seat. FIG. 4 shows the procedure of switching the operation mode.

In order to switch from the normal operation mode to the remote control reverse mode, the mode is switched from the driver's seat. When the operator switches to the remote control reverse mode, the controller 301 brakes the vehicle with the brake mechanism 304 to fix the vehicle. In this case, the brake valid signal 310 is checked and if the braking mechanism is not fully functional, it is prohibited from switching to the remote control reverse mode and the operator is told that it is not usable.

Subsequently, the controller 301 is the steering fixing mechanism 30.
The steering mechanism is fixed by 3 to limit the behavior of the vehicle during the remote control reverse movement.

After that, the driver leaves the driver's seat, moves to the rear part of the vehicle, and by using the remote control command device 201, the remote control backward movement by the command from the rear part of the vehicle becomes possible. Further, after using this function, the driver returns to the driver's seat again, and the remote control reverse mode is released, thereby releasing the brake mechanism and the fixation of the steering mechanism, and returning to the normal operation mode.

FIG. 3 shows the control system of this apparatus. In the controller 301, whether or not the remote control command device 305 is connected from the connector, whether the switch is in the remote control command device 305, or whether or not there is an obstacle from the obstacle sensor 306 provided at the front and rear portions of the vehicle, speed detection is performed. The vehicle speed is input from the device 302. Further, the controller outputs a control signal to the brake mechanism 304, the steering fixing mechanism 303, and the motor drive device.

FIG. 5 shows a generation logic circuit diagram of the motor drive command signal. Basically, when the fine speed backward switch is pressed and there is no obstacle behind, or when the fine speed forward switch is pushed and there is no obstacle ahead, the motor drive request signal 5
03 occurs.

Further, this motor drive request signal is permitted only when the detected speed of the speed detector is a certain value or less, the connection of the remote operation command device can be confirmed, and the key switch is valid, and the motor drive command is issued. The signal 501 is transmitted to the motor driving device.

While the motor drive command signal 501 is not valid, the brake command signal 502 is valid, and the brake is always applied except during the slow speed backward movement and forward movement to prevent an accident.

The logical configuration as described above ensures safety during the remote control backward movement.

In actual use, the remote control command device 201 becomes effective by inserting the connection cable of the remote control command device 102 into the rear connector of the vehicle and inserting the key into the key switch 204 of the remote control command device 201. .

Fine speed reverse switch 20 of the remote control command device
By pressing 2, the brake mechanism 304
Is released, the motor drive signal 309 is output, and the vehicle moves backward at a slight speed.

If any accident occurs during the retreat by remote control, the fine speed forward switch 20 of the remote control command device
By pressing 3, the braking mechanism 304
Is released, the motor drive signal 309 is output, and the vehicle moves forward at a slight speed.

However, in the above case, the forward movement is canceled at the time when the starting point where the remote operation is performed is reached.

The vehicle speed detector 302 constantly monitors the speed, and the controller 301 prevents the vehicle speed from rising above a certain speed.
Controlled by.

Further, obstacle sensors 306 such as infrared rays, ultrasonic waves and contact sensors are provided at the front and rear of the vehicle to monitor obstacles in the traveling direction.

When the obstacle sensor 306 detects an obstacle near the vehicle in the traveling direction, the motor drive signal 309 is immediately stopped, the brake mechanism 304 is activated, and the vehicle is immediately stopped.

[0025]

As described above, according to the present invention, it is possible to perform a slow-speed backward movement operation while visually confirming the safety of the rear of the vehicle with the naked eye, and simplify the side-by-side movement operation when parking or loading / unloading luggage. Further, it is possible to prevent the occurrence of accidents during these operations.

[Brief description of drawings]

FIG. 1 is an overall view of an electric vehicle equipped with this device.

FIG. 2 is an explanatory diagram of a remote control command device.

FIG. 3 is a control system diagram of this device.

FIG. 4 is a flowchart showing a procedure for switching remote control reverse operation.

FIG. 5 is a generation logic circuit diagram of a motor drive command signal.

[Explanation of symbols]

 101. ． ． Electric vehicle equipped with this device 102. ． ． Remote control command device 201. ． ． Remote control command device 202. ． ． Fine speed reverse switch 203. ． ． Fine speed forward switch 204. ． ． Key switch 301. ． ． Controller 302. ． ． Speed detector 303. ． ． Steering fixing mechanism 304. ． ． Brake mechanism 305. ． ． Remote operation command device 306. ． ． Obstacle sensor 307. ． ． Connector 308. ． ． Connector connection signal 309. ． ． Motor drive command signal 310. ． ． Brake effective signal 501. ． ． Motor drive command signal 502. ． ． Brake command signal 503. ． ． Motor drive request signal

Claims (1)

[Claims] 1. A large electric vehicle for freight equipped with an obstacle sensor mounted on a vehicle, a speed detector for the vehicle, a steering fixing mechanism, and a brake mechanism that can be electrically controlled. A remote control reversing device for an electric vehicle, which is provided with an operating device and is capable of retreating from a position other than the driver's seat.