KR101932222B1 - Driving apparatus of personal transportation device - Google Patents

Abstract

The present invention relates to a drive device for a personal moving means for driving an electric bicycle in a low speed or high speed mode using only two motors having different output and rotational forces without installing a speed change device, A wheel shaft 20; A high output motor (30) coupled to one side of the bicycle frame (10) and connected to one end of the wheel shaft (20) to generate power to rotate the wheel shaft (20); And a drive shaft is connected to the other end of the wheel shaft 20 to rotate the wheel shaft 20 at a higher speed than the rotation speed of the high output motor 30. The high output motor 30 is connected to the other end of the bicycle frame 10, A high rotation motor (40) for generating power to rotate the motor (40); And a power supply unit 51 for supplying power to the high output motor 30 and the high rotation motor 40. A drive signal is supplied to the high output motor 30 and the high rotation motor 40 so as to operate either the high output motor 30 or the high rotation motor 40 And a control unit (50) having a motor driving unit (52) for generating a wheel shaft (20), wherein the wheel shaft (20) is connected to one end of the high output motor An outer shaft (21) formed into a hollow shape and having one or more ratchet catching jaws (22) formed on an inner peripheral surface thereof; The other one of the high output motor 30 and the high rotation motor 40 is connected to the end of the outer shaft 21 so as to be connected to the end thereof. And an inner shaft 25 having a ratchet 26 hingedly engaged with the ratchet latch 22 on an outer circumferential surface thereof.

Description

[0001] Driving apparatus of personal transportation device [

More particularly, the present invention relates to a driving apparatus for a personal moving means, and more particularly, to a personal moving means such as an electric bicycle or a scooter, which is driven at a low speed or at a high speed by using only two motors, To a driving apparatus for a personal moving means.

Bicycles are widely used as a means of transportation and have great advantages in energy saving and space utilization. A typical type of bicycle is used by a user (a person in charge) to move the wheel by rotating the pedal, especially for the purpose of exercise. However, such a general bicycle has a disadvantage in that the driving force is drastically lowered in an uphill section where the inclination is severe.

In order to overcome the disadvantages of such a general bicycle, an electric bicycle has been developed. However, electric bicycles have the disadvantage that they are not suitable for the purpose of exercise, since they move the wheels by the electric power instead of the pedaling force.

In order to solve the above disadvantages, there has been developed a combined bicycle capable of running and easily traveling as needed. The combined bicycle is a bike that moves the wheels by selecting either the manual type driven by the pedaling force or the electric type driven by the electric power.

In the conventional combined type bicycle, the torque value of the pedal is calculated so as to quickly compensate for the driving force which is lowered depending on the surrounding situation, such as a severe uphill slope, so that the motor can be automatically driven when the torque exceeds a predetermined torque value.

In addition, a speed change device is separately provided to adjust the running speed of the electric bicycle through the speed change mode (high speed mode or low speed mode) of the motor, and it is also possible to easily run the vehicle on a ramp.

However, in the conventional electric bicycle, since the transmission device is necessarily installed in order to shift the motor, there is a problem that the cost of the driving device is increased and the structure of the driving device is complicated.

Japanese Patent Application Laid-Open No. 10-2014-0038044 (March 31, 2014, electric bicycle drive device) Japanese Patent Application Laid-Open No. 10-2016-0060816 (May 31, 2013, electric bicycle and control method thereof)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a motor control apparatus and a control method thereof, in which, by using two motors (for example, high output motors and high- So as to drive the personal moving means such as an electric bicycle or the like, thereby simplifying the structure of the driving apparatus.

In addition, the present invention can minimize the load applied to the motor by forming a dual-shaft wheel shaft to which two motors having different output and rotational force are coupled, and by selectively operating the motor according to the load value applied when the motor is driven, And it is an object of the present invention to provide a driving device for a personal moving means which can be conveniently used.

To achieve the above object, a driving device for a personal moving means includes a wheel shaft 20 horizontally installed at the center of front and rear wheels; A high output motor (30) coupled to one side of the bicycle frame (10) and connected to one end of the wheel shaft (20) to generate power to rotate the wheel shaft (20); And a drive shaft is connected to the other end of the wheel shaft 20 to rotate the wheel shaft 20 at a higher speed than the rotation speed of the high output motor 30. The high output motor 30 is connected to the other end of the bicycle frame 10, A high rotation motor (40) for generating power to rotate the motor (40); And a power supply unit 51 for supplying power to the high output motor 30 and the high rotation motor 40. A drive signal is supplied to the high output motor 30 and the high rotation motor 40 so as to operate either the high output motor 30 or the high rotation motor 40 And a control unit (50) having a motor driving unit (52) for generating a wheel shaft (20), wherein the wheel shaft (20) is connected to one end of the high output motor An outer shaft (21) formed into a hollow shape and having one or more ratchet catching jaws (22) formed on an inner peripheral surface thereof; The other one of the high output motor 30 and the high rotation motor 40 is connected to the end of the outer shaft 21 so as to be connected to the end thereof. And an inner shaft 25 having a ratchet 26 hingedly engaged with the ratchet latch 22 on an outer circumferential surface thereof.

The control unit 50 is connected to the circuit, and when the load of the pressure higher than the pressure set in the high-rotation motor is generated in a state where the high-rotation motor 40 is in operation, And the control unit 50 provides the motor drive unit 52 with a drive signal for operating the high output motor 30 in accordance with the load generation information of the motor load determination unit 53 do.

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According to the driving apparatus for the personal moving means of the present invention constructed as described above, only the two motors having different output and rotational power can be used to selectively operate the motor according to the road surface condition without driving the transmission, Therefore, the manufacturing cost can be reduced by reducing the cost of parts, and the structure can be realized with a simple structure as compared with the installation structure of the conventional transmission.

In addition, when the wheel shaft is formed as a double shaft, the load applied to each motor can be minimized, thereby extending the service life of the motor and an automatic conversion structure in which the motor is selectively operated according to the output pressure of the motor So that it can be used conveniently without inconvenience in an uphill road.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a drive system for a personal moving means according to the present invention; Fig.
2 is a perspective view of an electric bicycle equipped with a driving device for personal moving means according to the present invention,
FIG. 3 is a sectional view showing a high-output motor and a high-rotation motor installed on a wheel shaft according to the present invention,
FIG. 4 is a diagram showing a mounting state of a high-output motor and a high-rotation motor connected to a dual-
FIG. 5 is a view illustrating a state in which the ratchet is engaged with the ratchet engaging jaw in accordance with the rotation of the inner shaft according to the present invention,
Figure 6 is a state in which only the outer shaft is rotated without the ratchet being engaged by the ratchet engaging jaws according to the rotation of the outer shaft according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a driving apparatus for a personal moving means according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 6, the driving device of the personal moving means according to the present invention includes a wheel shaft 20 horizontally installed at the center of the front wheel and the rear wheel, A motor 30 and a high rotation motor 40 and a control unit 50 for controlling the high output motor 30 and the high rotation motor 40.

The wheel shaft 20 has both ends protruding through the bicycle frame 10 of the electric bicycle and is rotatably provided on the bicycle frame 10.

The high output motor 30 is axially coupled to one end of the wheel shaft 20 and the high rotation motor 40 is axially coupled to the other end of the wheel shaft 20.

The high output motor 30 is a motor configured to be driven at a high output and a low speed, and is a motor used in an uphill road or the like.

The high output motor 30 is installed such that a drive shaft is axially coupled to one end of the wheel shaft 20 and is coupled to one side of the bicycle frame 10. That is, only the drive shaft is connected to the wheel shaft 20 in a state where the case of the high output motor is coupled to the bicycle frame 10, and the wheel shaft 20 is rotated in one direction through the rotation of the drive shaft.

The high rotation motor (40) is a motor configured to rotate the wheel shaft (20) while being driven at a speed higher than the rotation speed of the high output motor (30), and is a motor used on a road surface having a large inclination.

The high-output motor 30 is connected to the high-output motor 30 such that the drive shaft is axially coupled to the other end of the wheel shaft 20. The high-output motor 30 is connected to the other end of the bicycle frame 10, Lt; / RTI >

The driving shaft of the high output motor 30 is rotated to rotate clockwise, and the driving shaft of the high rotation motor 40 is rotated in a counterclockwise direction so as to rotate the rear wheel of the electric bicycle so as to be forwardly moved. Respectively.

Therefore, when the armature electricity is driven, the high-rotation motor 40 is normally used on a normal road surface, and the high-output motor 30 is driven on an inclined road like an uphill road. Of course, it is also possible to control the high output motor 30 to be driven only in the ramp, and to drive both the high output motor 30 and the high rotation motor 40 so that the running of the electric bicycle can be performed more smoothly.

As described above, in the present invention, the low-speed mode and the high-speed mode of the electric bicycle are realized by using the high-output motor 30 and the high-rotation motor 40 as described above without providing any separate transmission, The optional use of high-speed motors makes it easy to drive on flat ground and uphill.

The high-output motor 30 and the high-rotation motor 40 are preferably covered with a cover so as not to be exposed to the outside.

The control unit 50 is configured to control the high output motor 30 and the high rotation motor 40 and includes a power supply unit 51 for supplying power to the high output motor and the high rotation motor, And a motor drive unit 52 for generating a drive signal to operate either or both of the high-rotation motor 30 and the high-rotation motor 40.

The motor driving unit 52 may be implemented as an on-off switch, and may be implemented by a manual control method by a user. Alternatively, when the user depresses the pedal, the motor driving unit 52 may be automatically operated to selectively drive the high- Control method. Of course, when the motor is first driven by the movement of the bicycle, it is preferable to recognize the rotation of the pedal to drive the motor as is well known.

In order to automatically control the pressure value of the pedal, the control unit 50 is provided with pedal torque sensing means for sensing the pedal torque and providing the sensing information to the control unit so as to provide the motor driving signal to the motor- It is preferable that the sensing unit 54 is connected to the circuit.

The pedal torque sensing unit 54 uses a known technique, and its detailed structure and operation principle will be omitted since it is a well-known technique known in the art.

According to the present invention configured as described above, when the vehicle travels on a non-inclined road surface, the control unit 50 provides a driving signal to the motor driving unit 52 to drive the high rotation motor 40, And is rotated. Of course, with the driving of the high-rotation motor, the user can press the pedal to rotate the rear wheel, thereby reducing the load on the high-rotation motor.

As described above, by driving the high-speed motor 40, the rear wheel is rotated to drive the electric bicycle. When the vehicle goes uphill, a load is generated in the high-speed motor due to the inclination, and the running speed of the electric bicycle is lowered.

At this time, the user can manually raise the uphill road by driving the high output motor by generating the driving signal to the high output motor through the manual operation of the motor driving unit. Of course, in addition to the manual operation mode, when the torque value of the pedal is greater than a constant torque value, the high output motor is driven to ascend the uphill road.

As described above, in the present invention, the high-speed motor is normally used for running, and the high-output motor is used for running in an inclined road like an uphill road.

On the other hand, the motor load determination unit 53 is connected to the control unit 50 of the present invention.

The motor load determination unit 53 is configured to provide the load generation information to the control unit 50 only when a load equal to or higher than a pressure set in the high rotation motor is generated in a state where the high rotation motor 40 is in operation , The control unit 50 provides the motor drive unit 52 with a drive signal for operating the high output motor 30 according to the load generation information of the motor load determination unit 53.

Therefore, even if the pedal torque is not measured, the high output motor can be driven by using the load value of the high-speed motor so that the ramp can be easily climbed uphill. Even if the user does not step on the pedal manually, This makes it easier and more convenient to use the electric bicycle, which can enhance the usability of the bicycle.

Here, the wheel shaft 20 may be formed as one shaft as described above, and a high-output motor and a high-rotation motor may be respectively connected to one end and the other end of the wheel shaft 20 to rotate the wheel shaft through driving of any one of the motors. When two motors use one wheel shaft, there is a possibility that a load is generated and the motor may be damaged or damaged.

Therefore, as shown in FIGS. 4 to 6, the wheel shaft 20 can be constructed as a double shaft.

Specifically, the wheel shaft 20 includes an outer shaft 21 having a hollow shape in which one of the motor of the high output motor 30 and the high rotation motor 40 is connected to the end, And an inner shaft 25 installed on the other end of the motor so as to be connected to the other end of the motor.

One or more ratchet catching jaws 22 are formed on the hollow inner peripheral surface of the outer shaft 21. Preferably, a plurality of inner circumferential surfaces of the outer shaft may be provided.

A ratchet 26 is hingedly coupled to the outer circumferential surface of the inner shaft 25 so as to be caught by the ratchet engaging jaw 22. The ratchet 26 rotates so that its end portion is downwardly moved by its own weight, And the inner shaft and the outer shaft are rotated together with the ratchet 26 engaged with the ratchet stop 22.

In the drawings, four of the ratchet teeth 26 are formed at intervals of 90 degrees.

Specifically, when the high output motor 30 connected to the inner shaft 25 is driven, the inner shaft is rotated so that the ratchet 26 is caught by the ratchet latch 22 and the outer shaft rotates together with the rotation of the inner shaft (See FIG. 5). When the high-rotation motor 40 connected to the outer shaft 21 is driven while the high-output motor is stopped, only the outer shaft is engaged with the ratchet 26 without being caught by the ratchet- And the rear wheel is rotated while being rotated (see Fig. 6).

Thus, when the high output motor 30 is driven, the inner shaft is rotated together with the outer shaft to rotate the rear wheel. When the high speed motor 40 is driven, only the outer shaft is rotated to rotate the rear wheel. The load on the high output motor is not generated when the motor is driven, thereby preventing damage to the high output motor caused by the load.

Since the ratchet 26 may not be caught by the ratchet catching jaw 22 even if the ratchet 26 is rotated by its own weight, a spring (not shown) may be provided to move the ratchet 26 against the inner shaft 25 .

When the spring is installed, the ratchet always protrudes outward due to the elastic force, so that when the inner shaft rotates, the ratchet is caught by the ratchet latching jaw and rotates together with the outer shaft. When the outer shaft is rotated, So that only the outer shaft can be rotated without being engaged with the ratchet latch jaw.

At this time, when the outer shaft is rotated, the ratchet 26 is not caught by the ratchet catching jaw 22, and noise may be generated due to contact with the inner circumferential surface of the outer shaft. Therefore, the ratchet is formed of a material Or may be formed of a material capable of minimizing the generation of noise on the inner circumferential surface of the outer shaft, or may be formed of a coating or outer shaft of a material with low noise.

According to the present invention configured as described above, the low-speed mode and the high-speed mode of the personal moving means such as the electric bicycle can be implemented simply by using the high-output motor and the high-speed motor without the transmission, and the flat road and the uphill road can be effectively run In particular, in the case where the motor load determining unit is provided, it is possible to automatically switch from the high speed mode to the low speed mode by using the load value of the motor at the time of traveling, Can be used more conveniently without stepping on the pedal or manual operation.

10: bicycle frame 20: wheel shaft
21: outer shaft 22: ratchet latch jaw
25: inner shaft 26: ratchet
30: High output motor 40: High speed motor
50: control unit 51:
52: motor drive unit 53: motor load determination unit
54: Pedal torque detection unit

Claims (3)

A wheel shaft 20 horizontally installed at the center of the front wheel and the rear wheel;
A high output motor (30) coupled to one side of the bicycle frame (10) and connected to one end of the wheel shaft (20) to generate power to rotate the wheel shaft (20);
And a drive shaft is connected to the other end of the wheel shaft 20 to rotate the wheel shaft 20 at a higher speed than the rotation speed of the high output motor 30. The high output motor 30 is connected to the other end of the bicycle frame 10, A high rotation motor (40) for generating power to rotate the motor (40);
And a power supply unit 51 for supplying power to the high output motor 30 and the high rotation motor 40. A drive signal is supplied to the high output motor 30 and the high rotation motor 40 so as to operate either the high output motor 30 or the high rotation motor 40 And a control unit (50) provided with a motor driving unit (52)
The wheel shaft 20 is rotatably supported by an outer shaft (not shown) in which one of the high-output motor 30 and the high-rotation motor 40 is connected to an end thereof and is formed in a hollow shape and has one or more ratchet- 21); The other one of the high output motor 30 and the high rotation motor 40 is connected to the end of the outer shaft 21 so as to be connected to the end thereof. And an inner shaft (25) hingedly coupled to the ratchet (26) on the outer circumferential surface so as to be engaged with the ratchet latching jaw (22).
The method according to claim 1,
The control unit 50 is connected to the circuit, and when the high-speed motor 40 is in operation and a load equal to or higher than the pressure set in the high-rotation motor is generated, (53) is provided,
Wherein the control unit (50) provides a drive signal for the operation of the high output motor (30) to the motor drive unit (52) according to the load generation information of the motor load determination unit (53) Driving device.
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