JP2000078708A - Motor driven wagon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor driven wagon capable of safe driving for the reverse operation of the motor driven wagon. SOLUTION: This motor driven wagon is formed so that the current of a battery 5 may flow through an electric motor 4 by the grip operation of a brake lever 8 fitted on a handle 10 as a switching means and cut off the current by grip-releasing operation, an electromagnetic brake 4a may be mounted on the electric motor 4 so as to operate at the time of the grip-releasing operation of the brake lever 8 to exert a brake function, a differential gear 6 may be interlockingly-connected to the axle 3a of a driving wheel 3, the electric motor 4 may be directly-connected to the differential gear 6, and a clutch mechanism 7 may be mounted so as to turn on and off the connection between the axle 3a and the differential gear 6. When the clutch mechanism 7 is disengaged, the axle 3a of the driving wheel 3 becomes free during operating of the electric brake 4, and when the clutch mechanism 7 is engaged, the axle 3a of the driving wheel 3 is locked unless the grip operation of the brake lever 8 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relatively small electric wagon equipped with a battery and driven by an electric motor.

[0002]

2. Description of the Related Art Recently, the development of electric vehicles equipped with a battery has been progressing in accordance with the trend of regulating exhaust gas and using clean energy. In response to this trend,
Many electric vehicles equipped with a battery have entered the motorcycles, tricycles, electric wagons, and the like. In particular, a relatively small electric wagon car is convenient as a means for transporting parcels in a building or a factory.

[0003] As such an electric wagon car, generally,
A front wheel is provided in front of the loading platform, a driving wheel is provided in the rear, an electric motor for driving the driving wheel is provided at a lower portion of the loading platform, and a battery as a power supply of the electric motor is mounted on an upper portion of the loading platform, and It is configured with a handle on the carrier. The start, stop, and speed are controlled by a switch (accelerator lever or the like) provided on the steering wheel.

[0004]

An electric wagon car of this type is usually provided with an electric motor and a pair of electromagnetic brakes as safety means, and when the drive switch is turned on, the electromagnetic brake is released and the wheels are simultaneously released. , And normally functions as a brake for the wheels. On the other hand, this type of electric wagon vehicle has an electric motor equipped with a speed reduction mechanism (star gear mechanism) and the like, but does not include a reverse gear, and therefore, a narrow passage (corridor) where turning cannot be performed by turning. In situations where the direction must be changed due to backward movement or width adjustment, etc., reverse movement is usually
Performed by manual push operation.

[0005] During the reverse travel, as described above, the electric motor always operates the electromagnetic brake.
In order to move backward, the brake lever (switch function) must be released (grip operation) to release the electromagnetic brake. However, in this case, the electric motor is driven forward and cannot move backward. Therefore, in reality, instead of operating the brake lever (switch function),
After the power switch (main switch) is turned off, the wagon is to be moved backward. Therefore, the power switch must be turned on and off every time the vehicle needs to be moved backward, which is very troublesome.

[0006] Further, when the vehicle is separated from the wagon after the reverse operation, if the power switch is forgotten, the wagon is in a free state. It is dangerous if you move on your own and the running path (corridor, etc.) is sloping.

Furthermore, since the brake lever (switch function) is depressed and operated during normal forward movement, even when the power switch (main switch) is turned off during reverse travel, the brake lever (switch function) is held as a handle grip. In some cases, the power switch (main switch) may be turned on in order to move forward while reversing and turning again while the grip operation is being performed. In this case, however, the wagon vehicle is being held because the brake lever (switch function) is being held. Suddenly started, and a very dangerous situation occurred.

The present invention has been made in view of the problems of the prior art,
An object of the present invention is to provide an electric wagon vehicle that can safely perform a driving operation related to a reverse operation of the electric wagon vehicle.

[0009]

In order to solve the above problem, an electric wagon according to the present invention is provided with a front wheel 2 in front of a loading platform 1 and a driving wheel 3 in the rear, and an electric wagon for driving the driving wheel 3. A motor 4 is provided at a lower portion of the loading platform 1, and a battery 5 serving as a power source of the electric motor 4 is provided at an upper portion of the loading platform 1.
And in the electric wagon equipped with the handle 10 on the carrier 1, the brake lever 8 is provided on the handle 10 as a switch means, and the electric current of the battery 5 flows to the electric motor 4 by the gripping operation. The current is interrupted by the grip release operation, the electric motor 4 is provided with an electromagnetic brake 4 a, and the brake lever 8 is operated in the grip release operation to exhibit a braking function. The output shaft of a differential gear 6 constituted by a star gear mechanism is interlocked to the axle 3a, the electric motor 4 is directly connected to the input shaft of the differential gear 6, and the axle 3a and the differential gear 6 are connected by operating a clutch lever 7a. A clutch mechanism 7 for turning on and off the connection is provided, and the electromagnetic brake 4a is operated while the clutch mechanism 7 is being turned off. The axle 3a of the drive wheel 3 is set in a free state, and in the engagement operation state of the clutch mechanism 7, the axle 3a of the drive wheel 3 is locked unless the brake lever 8 is released. Was taken.

In the present invention, the clutch lever 7a
Preferably, the clutch mechanism 7 is always urged in the on-going direction.

In the present invention, the handle 10 is provided with an accelerator grip 11, and the accelerator grip 11
It is preferable that the current of the battery 5 can be controlled by turning the vehicle to change the vehicle speed.

Further, in the present invention, it is preferable that a carrier frame 12 for accommodating a load is removably provided above the carrier 1.

Further, in the present invention, it is preferable that the clutch lever 7a is arranged so as to be able to be stepped on and protrude near the carrier 1.

[0014]

According to the present invention, there is provided a clutch mechanism 7 for turning on and off the connection between the axle 3a and the differential gear 6 by operating a clutch lever 7a. When the brake 4a is in operation, the axle 3a of the drive wheel 3 is set in a free state. In the on-operation state of the clutch mechanism 7, the axle 3a of the drive wheel 3 is locked unless the brake lever 8 is released. It is configured as follows.
Therefore, first, it is not necessary to turn on / off the power switch (main switch) each time when the wagon car needs to be moved backward as in the related art. The axle 3
a is connected to the differential gear 6 and then to the differential gear 6, so that the electromagnetic brake 4a is in a free state with respect to the operating electric motor 4 and can be freely moved backward by hand.

Further, even after the reverse operation is completed, even if the clutch mechanism 7 is forgotten to be engaged and the brake lever 8 (switch) is depressed, the electric wagon does not start. In short, there is no need to operate the power switch (main switch).
Electromagnetic brake 4a is in operation and therefore always
The forward movement is started from a state where the electromagnetic brake 4a is operating. In other words, the clutch mechanism 7 of the present invention
Is provided in order to avoid a malfunction associated with the reverse operation, and exhibits its value in the disengaged state. Their roles are different.

In particular, when the clutch lever 7a is constantly urged into the engaged state, the wagon vehicle is in a free state only when the clutch lever 7a is turned off to perform a reverse operation. When the gear 7a is released, it returns to the engaged state, and the differential gear 6 and the electric motor 4 are immediately connected to each other.
Is locked.

Further, an accelerator grip 11 is provided on the steering wheel 10, and the vehicle speed can be changed by controlling the current of the battery 5 by rotating the accelerator grip 11, so that optimum speed control can be achieved. Can do.
When the carrier frame 12 for accommodating the cargo is provided detachably on the upper part of the carrier 1, the loading of the cargo on the carrier can be simplified and the collapse of the cargo can be prevented. Further, when the clutch lever 7a is disposed so as to protrude near the carrier 1 so as to be capable of stepping on, even if both hands are taken by operating the handle, the clutch can be easily operated with one foot and the operation is easy. is there.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an electric wagon car according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall perspective view of an electric wagon vehicle, and FIG. 2 is a drive system diagram thereof.

As shown in FIGS. 1 and 2, the basic structure of the electric wagon car according to the present invention is as follows. A front wheel 2 is provided in front of a loading platform 1 and a driving wheel 3 is provided in the rear. 4 is provided at a lower portion of the loading platform 1, and a battery 5 as a power source of the electric motor 4 is mounted on the upper portion of the loading platform 1,
Further, a handle 10 is provided on the carrier 1. A brake lever 8 is provided as a switch means on the handle 10 so that the electric current of the battery 5 flows to the electric motor 4 by the grip operation, and the current is cut off by the grip release operation. A loading frame 12 for storing luggage is detachably provided above the loading platform 1.

Further, the electric motor 4 is provided with an electromagnetic brake 4a so that the brake is operated when the brake lever 8 is released from the grip to exert a braking function. Then, an output shaft of a differential gear 6 constituted by a star gear mechanism is operatively connected to an axle 3a of the drive wheel 3, and the electric motor 4 is directly connected to an input shaft of the differential gear 6, and further, an operation of a clutch lever 7a is performed. There is provided a clutch mechanism 7 for turning on and off the connection between the axle 3a and the differential gear 6. The clutch lever 7a is always urged by the spring in the direction in which the clutch mechanism 7 is engaged.
However, a two-position switching type clutch lever may be used as the clutch lever 7a. Further, the clutch lever 7a is arranged so as to protrude near the lower portion of the carrier 1 so that the clutch lever 7a can be stepped on.

In particular, in the present invention, the axle 3a of the drive wheel 3 is brought into a free state while the electromagnetic brake 4a is in operation by the disengagement operation of the clutch mechanism 7, and in the on-operation state of the clutch mechanism 7, The axle 3a of the driving wheel 3 is configured to be in a locked state unless the brake lever 8 is released from being gripped.

An accelerator grip 11 is provided on the steering wheel 10, and the vehicle speed can be changed by controlling the current of the battery 5 by rotating the accelerator grip 11. This control is performed by the controller 13 shown in FIG. 2 (provided on a part of the handle 10).
However, since the circuit itself is publicly known,
The detailed description is omitted. Also, this controller 13
Is a wiring source to the electromagnetic brake 4a.

[0023]

According to the present invention, in an electric wagon equipped with a differential gear having excellent turning and running performance, the clutch lever can be operated without operating the power switch (main switch) each time when the reverse operation is involved. In this way, it is possible to easily shift to the reverse operation and to move forward, without leaving the wagon in a free state, and thereby to achieve the remarkable effect that the malfunction can be eliminated and the driving operation can be performed safely. Reached. Other advantages of the present invention are as described in the above-described embodiments of the present invention and the examples.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric wagon vehicle of the present invention.

FIG. 2 is a drive system diagram of the electric wagon vehicle of the present invention.

[Explanation of symbols]

 Reference Signs List 1 loading bed 2 front wheel 3 drive wheel 3a axle 4 electric motor 4a electromagnetic brake 5 battery 6 differential gear 7 clutch mechanism 7a clutch lever 8 brake lever 10 handle 11 accelerator grip 12 carrier frame

Continued on the front page (72) Inventor Ryoji Iwakiri 1-31-203 Shinmachi, Nishi-ku, Osaka-shi, Osaka F-term in Daiwa Sangyo Co., Ltd. (Reference) 3D050 AA01 BB03 DD03 EE08 EE15 GG06 JJ01 JJ07 KK14 5H115 PA01 PA08 PC06 PG04 PI13 PI29 PU01 QE12 QE13 QI07 RB02 SE03 SE07 TO21 TO23 UI14 UI24

Claims (5)

[Claims] 1. A front wheel 2 and a driving wheel 3
And an electric motor 4 for driving the driving wheels 3 is provided at a lower portion of the carrier 1, a battery 5 as a power source of the electric motor 4 is mounted on the upper portion of the carrier 1, and a handle 10 is provided on the carrier 1. An electric wagon equipped with a steering wheel, wherein the handle 1 is provided with a brake lever 8 as a switch means.
0, the electric current of the battery 5 is supplied to the electric motor 4 by the grip operation, and the electric current is interrupted by the grip release operation. The electromagnetic brake 4a is provided in the electric motor 4, An output shaft of a differential gear 6 constituted by a star gear mechanism is interlockedly connected to an axle 3a of the drive wheel 3 so as to operate in a grip release operation to exert a braking function, and an input shaft of the differential gear 6 is connected to the input shaft of the differential gear 6. An electric motor 4 is directly connected, and a clutch mechanism 7 for turning on and off the connection between the axle 3a and the differential gear 6 by operating a clutch lever 7a is provided.
In addition, by disengaging the clutch mechanism 7, the axle 3a of the drive wheel 3 is set to a free state while the electromagnetic brake 4a is operating, and the brake lever 8 is released when the clutch mechanism 7 is engaged. An electric wagon vehicle configured to lock the axle 3a of the drive wheel 3 unless operated. 2. The electric wagon vehicle according to claim 1, wherein said clutch lever 7a constantly urges said clutch mechanism 7 in an engagement direction. 3. An accelerator grip 11 provided on the handle 10.
3. The electric wagon vehicle according to claim 1, wherein a vehicle speed can be changed by controlling a current of the battery 5 by rotating the accelerator grip 11. 4. 4. An electric wagon vehicle according to claim 1, wherein a loading frame 12 for storing luggage is provided at an upper portion of said loading platform 1 so as to be detachable. 5. The electric wagon vehicle according to claim 1, wherein said clutch lever 7a is disposed so as to protrude in the vicinity of said carrier 1 so as to be capable of stepping.