JPH10138980A - Electric skater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric skater by providing a steering shaft pipe on the front part of a vehicle body frame whose rear part is supported by right and left wheels, rotatably supporting a front fork for supporting a front wheel on the shaft pipe, and supporting an electric motor and a power feeding battery to be connected to the front wheel by supporting a driving case to the front fork. SOLUTION: A driving case in which two box bodies 21, 22 arranged right and left are connected by a connecting box 23 on the front side is attached between a front fork 13 and an axle 16, the left side box body 21 is taken as a driving box housing an electric motor 30 and a speed reduction gear device 40, and the right side box body 22 is taken as a battery box housing a battery 31. The battery 31 having the relative large weight, the electric motor 30 and the speed reaction gear device 40 are distributed right and left with respect to the front wheel 15, the weight distribution is equalized, and stabilization is achieved. A pressure sensitive switch is arranged on a foot placing plate 11a for a user P, a skater 10 is started by operating the electric motor 30 by closing the switch when the foot is placed on the floor placing plate and when the weight is put on it, and the skater can be automatically stopped when a person jumps our.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric skater which is driven by power instead of a conventional kick skater.

[0002]

2. Description of the Related Art In general, bicycles are still frequently used in factories as a means of moving within a large factory site or when distributing documents and mails in the factory.
However, the bicycle had to get off the bicycle every time it stopped, and had to hang and remove the stand, which was troublesome. On the other hand, there is a skater which has been conventionally used for playing a baby as a vehicle without such trouble. The skater is a small-diameter front wheel that is a steering wheel,
It has a small rear wheel attached to the rear of the frame, and is designed to run on the ground by kicking one foot on a low frame.

[0003]

However, when trying to use a skater instead of a bicycle, the conventional skater of the kicking type was used for infants' play, and there was no place for placing documents, etc. If you fall down or drive by kicking the ground, the speed is low,
There was a problem that long-time use was accompanied by great fatigue.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an electric skater which has solved the above-mentioned problems. A steering shaft pipe is provided at a front portion of a body frame having a rear portion supported by left and right wheels. A front fork supporting the front wheel is rotatably supported on the steering shaft tube, a drive case is supported on the front fork, and an electric motor connected to the front wheel is connected to the drive case. It is something that was supported. The drive case has an electric motor on one side and a battery on the other side with the front wheel interposed therebetween. Further, the upper surface of the motor body frame is formed as a footrest plate,
The footrest plate is provided with a pressure sensor for controlling an open / close switch interposed in a power supply circuit between the electric motor and the battery.
Further, a current increasing / decreasing means is provided in a power supply circuit connecting the motor and the battery, and the current increasing / decreasing means constitutes a speed increasing / decreasing means for detecting the magnitude of the load and increasing / decreasing the current supplied to the motor.

[0005]

The driving device of the electric skater is located on the side of the front wheel and attached to the front fork, from which the front wheel is driven. Since both the electric motor driving the front wheels and the battery have a relatively large weight, by distributing them to the left and right of the front wheels, the weight balance between the left and right is stabilized. A power supply circuit connecting the electric motor and the battery is energized by the motor when a weight of the user acts on the footrest according to a signal from a pressure sensor provided on the footrest. The current increasing / decreasing means provided between the motor and the power supply circuit increases the power supply current to the motor when the load increases, and conversely reduces the power supply current when the load decreases, and also provides the reverse rotation force for braking. The technical idea encompasses the application of the suffix or the application of the restraint holding force. While the conventional skater has a structure in which one foot is mounted, the present invention provides a space in which one foot or both feet can be mounted.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a side view showing a use state of an electric skater 10 utilizing the present invention. The electric skater 10 has a plate-shaped body frame 11 extending in the front-rear direction. The body frame 11 is supported by small left and right rear wheels 12, 12 provided at a rear portion thereof, and the upper surface thereof is provided on the footrest plate 1 of the user P.
1a. A steering shaft tube 11b is welded to the front end of the body frame 11, and a front fork 13
Are rotatably supported on the left and right. Reference numeral 14 denotes a steering handle, which is detachably attached to the upper part of the front fork 13.
The portability of the electric skater 10 is improved. Reference numeral 15 denotes a front wheel, which is supported on a lower end of the front fork 13 by an axle 16.

In this embodiment, a drive case 20 is mounted between the front fork 13 and the axle 16. As shown in FIGS. 2 and 3, the drive case 20 connects the two left and right boxes 21 and 22 with the front connection box 23, and is formed in a substantially U-shape in plan view. The left box 21 is a drive box containing the electric motor 30 and the reduction gear unit 40 and the like, and the right box 22 is a battery box containing the battery 31. The drive case 20 has a cross-sectional shape of a portion covering the front surface of the front wheel 15 in an arc shape as shown in FIGS. 1 and 2, so that no damage is caused when a person or an object collides. Thus, the relatively heavy battery 31 and
The electric motor 30 and the reduction gear device 40 are distributed to the left and right of the front wheel 15 so as to equalize the weight distribution and achieve stability. The electric motor 30 and the battery 31 are connected to each other by a power supply line 24 that is supported through the inside of the connection box 23.
Reference numeral 25 denotes a headlight, which is attached to an upper outer surface of the connection box 23. Reference numeral 26 denotes a front carrier, which is a steering shaft tube 1 for facilitating taking in and out of documents and documents.
1b.

The motor 30 housed in the left box 21 as a drive box is connected to the axle 16 via a reduction gear unit 40. That is, the reduction gear device 40 is composed of a two-stage gear reduction device including a first reduction gear 40a including a gear connected to the output shaft of the electric motor 30, and a second reduction gear 40b connected to the front axle 16. , About 1/10. Reference numeral 34 denotes a controller, which is a power supply circuit 5 described later.
This is a means for increasing / decreasing the current interposed in 0.

FIG. 4 shows a power supply circuit 50 connecting the electric motor 30 and the battery 31. The power supply circuit 50 includes two switches, a main switch 32 and a pressure-sensitive switch 33 (sensor), between the motor 30 and the battery 31 and a controller 34.
And are inserted in series. The main switch 32 is manually opened and closed using a key, and is used to shut off the circuit 50 when not in use to prevent an accidental start accident. The main switch 32 is provided on the front side of the body frame 11 as shown in FIG. Although the electric skater of the present invention is composed of three wheels and does not fall over, it is difficult for a vehicle of this type to escape several tens of times in life. The battery 31 is dry, the headlights 25 are not grounded, the boxes 21 and 22 are formed in a U-shape to function as a bumper, and the handle ends are provided with light rubber, for example.

The pressure-sensitive switch 33 is used by the user P to place the footrest 1 on the footrest 1.
The motor 30 is closed when the foot is placed on the foot rest plate 11a and the weight is applied. The pressure-sensitive switch 33 may be a mechanical switch. In this embodiment, the pressure-sensitive switch 33 is constituted by an electronic switch which is indirectly opened and closed by a signal from a load cell 35 installed on the footrest plate 11a. Thus, the user P has the footrest plate 11a.
The skater 10 starts running when the user puts his / her foot upward, and runs at a speed of about 10 km / h, and stops automatically when the user P jumps down.

The controller 34 is a device for controlling the current flowing through the circuit to be substantially constant to keep the vehicle speed constant. The controller 34 is provided with a vehicle speed sensor (not shown) and a calculator (not shown). The current flowing through the circuit 50 when reduced at the rate of Thus, when the vehicle speed decreases when the skater 10 climbs the slope, the current is automatically increased to maintain the predetermined vehicle speed, enabling the climb of about 6 °. However, when accelerating from a stopped state, since the vehicle speed is in a rising scene, the speed increasing function of the controller 34 does not operate, and the user P is not surprised by unexpected sudden acceleration when starting. In general, when the user P jumps off, the current of the electric motor 30 is generally cut off. However, when a stronger braking is desired, the electric motor 30 is operated as a generator by the controller 34. When a stronger stopping force is desired, the band brake is actuated by a solenoid switch. (Not shown)

[0012]

As described above, in the electric skater 10 according to the present invention, after the main switch 32 is turned on, the user P
However, the vehicle starts when the foot is placed on the foot rest plate 11a and stops when the vehicle descends on the ground, so that the vehicle is easy to operate and is convenient as a vehicle that needs to frequently go up and down. Further, since the relatively heavy motor 30 and the battery 31 are arranged separately on the left and right sides of the front wheel 15, the weight balance is good. Furthermore, when the skater 10 climbs uphill and the vehicle speed decreases, the current to the electric motor 30 increases and the speed is further reduced, so that the user's labor can be reduced. And so on.

[Brief description of the drawings]

FIG. 1 is a right side view showing a use state of an electric skater according to an embodiment of the present invention.

FIG. 2 is a right side view of the electric skater.

FIG. 3 is a bottom view thereof.

FIG. 4 is a circuit diagram showing a power supply circuit of the electric skater.

[Explanation of symbols]

10 electric skater 11 body frame 11a footrest plate 11b steering shaft tube 12 rear wheel 13 front fork 14 steering Handle 15 ··· Front wheel 16 ··· Axle 20 ··· Drive case 21 ··· Box (drive box) 22 ··· Box (battery box) 23 ··· Connection box 24 ··· Feed line 25 ··· Headlights 26 ··· Front carrier 30 ··· Motor 31 ··· Battery 32 ··· Main switch 33 ··· Pressure sensitive switch 34 ··· Controller 35 Load cell 40 Reduction gear 40a First reduction gear 40b Second reduction gear 50 Power supply circuit P

Claims (4)

[Claims] A steering shaft tube is provided at a front portion of a body frame having a rear portion supported by left and right wheels, and a front fork for supporting a front wheel is rotatably supported on the steering shaft tube, and the front fork is provided. An electric skater having a driving case supported by the driving case, the driving case supporting an electric motor connected to the front wheels, and a battery for supplying power to the electric motor. 2. The electric skater according to claim 1, wherein the drive case has a motor supported on one side and a battery supported on the other side with the front wheel interposed therebetween. 3. A pressure-sensitive sensor according to claim 1, wherein an upper surface of said motor body frame is formed as a footrest plate, and said footrest plate controls an open / close switch interposed in a power supply circuit between said motor and said battery. Electric skater provided. 4. A power supply circuit for connecting the electric motor and a battery, wherein a current increasing / decreasing means is provided.
An electric skater in which the current increasing / decreasing means detects a magnitude of a load and increases / decreases a current supplied to the electric motor.