JP2521158Y2 - Accelerator safety device for electric vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an accelerator safety device in an electric vehicle,
In particular, the present invention relates to an accelerator safety device applied to an electric tricycle that runs at a low speed of 6 km / hour or less.

[Conventional technology]

In recent years, an electric three-wheeled vehicle as shown in FIG. 3 has been developed and is widely popularized for people with disabilities and elderly people who have difficulty traveling. This electric tricycle is easy to operate and can safely drive at a low speed of 6 km / h or less,
It is a substitute for the foot of a handicapped person or an elderly person, operating near the steering handle with the fingers of the operator's hand and pushing it increases the speed of the vehicle, and when releasing the pushing It is equipped with an accelerator lever that stops the running of the vehicle. When the accelerator lever is pushed down little by little with the finger of the operator's hand, the vehicle gradually shifts from the stopped state to the traveling state and gradually increases the traveling speed until it reaches the maximum speed (6km /
reach h). When the driver wants to stop the vehicle while traveling or when he / she wants to stop suddenly due to danger, he / she releases the accelerator lever, and the accelerator lever returns to the stop position by the return spring, so that the vehicle stops traveling.

[Problems to be solved by the device]

However, if the driver feels a danger while driving the vehicle as described above, he or she may get nervous and grip the levers such as the accelerator lever strongly, so that the vehicle runs at maximum speed. There was a problem that the danger could not be avoided as it continued.

The present invention has been made for the purpose of solving the above problems.

[Means for solving the problem]

In order to achieve the above object, the present invention provides an accelerator lever that is operated near the steering handle with the fingers of the operator to increase the speed of the vehicle when pressed and stops the vehicle when released. In an electric vehicle comprising, in the position of the accelerator lever, the speed of the vehicle increases when pressed and reaches a maximum, and a plunger or spring that operates only when the accelerator lever is pressed at a pressure equal to or higher than a predetermined pressure is provided, A switch is provided which is activated when the plunger or the spring is activated to interrupt the electric circuit of the vehicle traveling motor.

[Action]

According to the present invention having the above-mentioned configuration, when the accelerator lever is pushed or gripped with a stronger pushing force than the ordinary pushing force which the vehicle speed increases to the maximum when pushed,
The plunger or spring is activated and the switch is activated to shut off the electric circuit of the vehicle drive motor to stop the vehicle from traveling. Therefore, when the driver feels dangerous and squeezes the accelerator lever strongly while the electric vehicle is traveling, the plunger or spring is activated to activate the switch, and the electric circuit of the vehicle traveling motor is activated. Is cut off and the vehicle stops running, avoiding danger.

〔Example〕

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

In FIG. 3, an electric tricycle 1 designated by reference numeral 1 has one front wheel 2 and two rear wheels 3 and is driven by a vehicle running motor that operates using a battery (not shown) provided in a prime mover section 4 as a power source. It is designed to drive the rear wheel 3 and run at a speed within 6 km / h (specified speed), and is mainly used by people with disabilities and elderly people who have difficulty running. . As shown in FIG. 4 in an enlarged manner, the electric tricycle 1 is provided with a loop-shaped steering handle 6 above a front wheel 1 via a handle shaft 5, and the steering shaft 5 and the steering handle 6 are connected to each other. A control box 7 is provided in the section. The control box 7 is provided with an accelerator lever 8 shown in FIGS. 1 and 2 so that it can be operated by the finger 10 of the operator's hand 9 from the side of the steering handle 6 and also functions as a lighting switch. 11, a speed change switch 12 for selecting high speed, medium speed, and low speed, a front / reverse change switch 13 for selecting forward / reverse, a horn switch 14, a display window 15 and the like are provided.

In the display window 15, a battery remaining meter, an abnormality in electric wiring (for accelerator), an abnormality in speed control, an overload on a slope or the like (abnormal heat generation of motor), an abnormality in electric wiring (abnormal charging), etc. Signal lamps, buzzers, etc. are stored,
It is controlled by a microcomputer, and it is displayed by a meter or signal lamp, and an alarm is issued when an abnormality occurs. A brake lever 16, a rearview mirror 17 and the like are attached to the front portion of the steering handlebar 6. A foot cover 19 is provided in the front part of the foot step 18 provided in the lower part of the vehicle body, and a headlight 20 is provided in the front part of the vehicle body on the front side thereof.

On the other hand, a charging plug and a cord 21 are provided at the front of the motor unit 4 so that they can be inserted and removed freely.
It can be charged simply by pulling out the cord and inserting the plug into the 0V power outlet. Further, a clutch lever 22 is provided at the rear of the prime mover unit 4, and when the electric tricycle 1 is moved by hand, the clutch is in the “disengaged” state, and the clutch is normally in the “engaged” state for use. is there. Driver seat 23 above the prime mover section 4
The driver's seat 23 has a structure in which it can be rotated 360 degrees in the horizontal direction by an operation lever (not shown), and is stopped and fixed at the front position. The side frames 24, 24 are rotatable up and down about the base side thereof, and have a structure in which a person with a disability can easily get on and off the driver's seat 23 in a state of being rotated upward. .

As shown in detail in FIGS. 1 and 2, the accelerator lever 8 is supported by a supporting piece 25 provided upright on the control box 7 via a support shaft 26 so as to be rotatable in the front-rear direction and supported. A return spring 27 is wound around the support position of the shaft 26 to give the accelerator lever 8 a habit of returning. An arcuate meshing tooth 28 is formed at the tip of the accelerator lever 8 and meshes with a meshing tooth formed on the outer circumference of a variable resistor 29 that controls the rotation of the vehicle traveling motor. The meshing teeth 28 rotate the variable resistor 29 to control the traveling speed of the vehicle. When the accelerator lever 8 is at the "0" position in FIG. 1, the vehicle stops traveling, and when the accelerator lever 8 is pushed down or squeezed by the finger 10 of the operator's hand 9 at this position, the vehicle runs. When the accelerator lever 8 is pressed further, the speed gradually increases until the maximum speed of 6 is reached at the "max" position.
When the vehicle reaches km / h and releases the pressure by releasing the accelerator lever 8, the repulsive force of the return spring 27 returns the accelerator lever 8 to the "0" position to stop the vehicle from traveling. The above-described configuration is similarly provided in the conventional electric tricycle.

In the accelerator lever 8 of the present invention, the above "ma
From the "x" position, the driver pushes down or grasps the accelerator lever 8 with a stronger force and presses it with a pressure higher than a predetermined pressure to contact the tip of the accelerator lever 8 only when the "emergency stop" position is reached. A limit switch 31 is provided which is provided with a plunger 30 which is in an operating state, and when the plunger 30 is activated, the plunger 30 comes into contact with the tip end portion of the accelerator lever 8 to activate the electric circuit of the vehicle traveling motor.
Is provided. This plunger 30 (or spring,
Alternatively, the limit switch 31 may be replaced with an elastic body having the same action) and the limit switch 31 releases the pressing of the accelerator lever 8 and when the accelerator lever 8 is rotated by the return spring 27 to return in the “0” direction, the accelerator is pressed. The contact with the tip of the lever 8 is released and the lever 8 returns to its original state.

In the accelerator safety device for an electric vehicle having such a configuration, the accelerator lever 8 of the electric tricycle 1 is first
When the vehicle is in the "0" position in the figure, the vehicle has stopped traveling. In this state, the operator sits in the driver's seat 23, grasps the steering handle 6 with his / her hand 9, and presses the accelerator lever 8 with the finger 10 extended from the steering handle 6, the accelerator lever 8 is centered on the spindle 26. To rotate the variable resistor 29 with the meshing teeth 28, the vehicle traveling motor rotates and the vehicle starts traveling. When the accelerator lever 8 is further pressed, the variable resistor 29 further rotates. The driving speed gradually increases and reaches the maximum speed (6 km / h) at the "max" position. When stopping the traveling of the vehicle, if the accelerator lever 8 is released to release the pressing, the repulsive force of the return spring 27 causes the accelerator lever 8 to rotate back to the "0" position side,
The meshing teeth 28 cause the variable resistor 29 to rotate to the opposite side, which stops the rotation of the vehicle traveling motor and stops the traveling of the vehicle.
When the traveling of the vehicle is stopped, the automatic control device works together with the rotation stop of the vehicle traveling motor, and the vehicle is quietly and surely stopped by the electromagnetic brake.

When the electric tricycle 1 is running and the driver feels a danger and must stop the running of the vehicle, he / she is upset and grips the accelerator lever 8 with a pressure much larger than the normal accelerator lever operating force. , It may push down. In such a case, the accelerator lever 8 is rotated to the "emergency stop" position in FIG. 1 to push the plunger 30 into the operating state and the limit switch 31 into the operating state. As a result, the electric circuit of the vehicle driving motor is cut off and the vehicle suddenly stops, and the danger can be avoided. In this state, when the accelerator lever 8 is released from being gripped or pushed down, the return spring 27 causes the accelerator lever 8 to return to the "0" position, and at the same time, the limit switch 31 returns to the original electric circuit conductive state and the plunger 30 returns to the original non-operating state, and the electric tricycle 1 returns to the driving-ready state.

In addition, in the electric tricycle 1 of this embodiment, even a person who is experienced in driving a car or a motorcycle can easily operate the vehicle, and the maximum speed is suppressed to 6 km / h. Since it corresponds to a wheelchair, it is treated as a pedestrian and no driver's license is required. In addition, it is possible to drive for about 5.5 hours or about 20 to 30 km in a single charge, and the climbing ability is up to about 15 degrees.

[Effect of device]

As described above, according to the accelerator safety device for an electric vehicle of the present invention, only when the accelerator lever is pressed to a position where the traveling speed of the vehicle is maximized by pressing the accelerator lever with a pressure equal to or higher than a predetermined pressure. Since a plunger or spring that operates is provided, and a switch that operates when the plunger or spring is activated to cut off the electric circuit of the vehicle driving motor is provided, the operator feels a danger while the vehicle is driving, and the accelerator When the lever is pushed or squeezed with a stronger pushing force than the normal pushing force, the plunger or spring is pushed into the operating state, and then the switch is activated to shut off the electric circuit of the vehicle drive motor. The vehicle can be stopped immediately, which is safe and avoids danger.

Also, in an emergency, the plunger or spring and the switch are activated to stop the vehicle from traveling, and then the accelerator or lever is simply released to return the plunger or spring and the switch to their original state and become ready for operation. Operability is good.

[Brief description of drawings]

1 is a side sectional view of an accelerator lever portion, FIG. 2 is a side sectional view of the same portion, FIG. 3 is a perspective view of an electric tricycle as a whole, and FIG. 4 is a perspective view of a steering handle portion. 1 ... Electric tricycle, 2 ... Front wheel, 3 ... Rear wheel, 4 ...
Motor part, 5 ... Handle shaft, 6 ... Steering handle, 7 ... Control box, 8 ... Accelerator lever, 9 ... Pilot's hand, 10 ... Pilot's finger, 11 ... Key switch, 12 …… Speed switch, 13 …… Forward / reverse switch, 14 …… Horn switch, 15 …… Display window, 16 …… Brake lever, 17 …… Rear view mirror, 18
…… Foot step, 19 …… Foot cover, 20 …… Headlight, 21 …… Charging plug and cord, 22 …… Clutch lever, 23 …… Operating seat, 24 …… Side frame, 25 …… Support piece, 26 …… spindle, 27 …… return spring, 28 ……
Interlocking teeth, 29 ... Variable resistor, 30 ... Plunger, 31 ...
…Limit switch.

Claims (1)

(57) [Scope of utility model registration request] 1. An electric vehicle having an accelerator lever near a steering handle, which is operated by a finger of a driver's hand to increase the speed of the vehicle when pressed and which stops the vehicle when the pressure is released. When the accelerator lever is pressed, the speed of the vehicle increases and reaches a maximum, and a plunger or spring that operates only when the accelerator lever is pressed at a pressure equal to or higher than a predetermined pressure is provided, and the plunger or spring operates. An accelerator safety device for an electric vehicle, which is provided with a switch that is activated at times to cut off an electric circuit of a vehicle traveling motor.