KR20180096014A - Electric scooter with heat dissipation function - Google Patents

Abstract

The present invention relates to an electric scooter with a heat radiating function, applying a heat radiating means capable of radiating heat generated from an in-wheel motor. According to the present invention, the electric scooter with a heat radiating function comprises: a base frame; a front wheel unit including a front wheel formed on the front side of the base frame to be able to roll and rotate on the ground; a rear wheel unit including a rear wheel formed on the rear side of the base frame to be able to roll and rotate on the ground; a steering angle adjustment unit to adjust a steering angle of the front or rear wheel by user′s operation; and a driving operation unit to rotate the front or rear wheel by a power source. The driving operation unit comprises: the in-wheel motor fixing a stator on a shaft of the first or rear wheel for rotation, and connecting a rim wheel of the first or rear wheel to a rotor rotated by surrounding the stator; and the heat radiating means to radiate the heat generated from the in-wheel motor. The heat radiating means includes a plurality of heat radiating fins spread in a radial shape from the center on the rim wheel and having a protrusion part coming in contact with air.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric scooter,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric scooter including a wheel having a heat radiating function, and more particularly, to an electric scooter having a heat dissipating function using a heat radiating means To an electric scooter.

In general, an electric scooter drives a motor by a battery, and can be easily operated as a moving means for moving, so that anyone can learn easily, so that a person with a disability and an elderly person often use it.

On the other hand, the electric scooter is mostly a two-wheel system, and a three-wheel system is disclosed in Korean Patent Publication No. 10-2011-0093171.

In contrast to the way in which a wheel is rotated by a power transmission through an engine-mission-drive shaft in a gasoline or diesel vehicle, an in-wheel motor incorporates a motor in the wheel rim, It is a direct drive motor that drives the car to transmit power directly to the wheel.

Such an in-wheel motor can reduce the weight of the vehicle because it can omit the drive and the power transmission device such as the engine, the transmission or the differential gear, and can reduce the energy loss in the power transmission process. It is popular as a car motor.

In addition, an automobile equipped with an in-wheel motor has various advantages such as easy operation and assembling by securing the interior space of the vehicle body, easy maintenance and exchange during traveling, and emergency operation.

On the other hand, an in-wheel motor having such a structure can exhibit its original function only when it is cooled smoothly, or its performance deteriorates.

Particularly, for example, when the motor is driven at high speed or when a high output is required on the hill, the in-wheel motor needs to be cooled more. Otherwise, there is a high risk that the in- Respectively.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an in-wheel motor for driving a wheel and a heat dissipation device using heat dissipation means for dissipating heat generated in a win- And an electric scooter having the function of the electric motor.

According to an aspect of the present invention, there is provided an electric scooter including a wheel having a heat radiating function, including: a base frame; A front wheel having a front wheel rotatable with respect to the ground on the front side of the base frame; A rear wheel having a rear wheel rotatable with respect to the ground on the rear side of the base frame; A steering angle adjusting unit for adjusting a steering angle of the front wheel or the rear wheel by a user's operation; A driving unit for rotating the front wheel or the rear wheel by a power source; Wherein the traveling driving unit includes an in-wheel motor having a stator fixed to the front wheel or a shaft of the rear wheel for rotation, and a rotor rotatably surrounding the stator, wherein the front wheel or the rear wheel is connected to a rim wheel And a radiating means for radiating heat generated in the in-wheel motor, wherein the radiating means includes a plurality of radiating fins extending radially from the center on the rim wheel and the protrusions contacting the air. do.

The electric scooter including a wheel having a heat radiating function according to the present invention is characterized in that the radiating means further comprises a blowing fan for blowing air to a gap between the stator and the rotor.

Further, in the electric scooter with a cooling function according to the present invention, in the air blowing fan, when the rim wheel is rotated by forming an air induction slope portion in the radiating fin, the radiating fin rotates in a gap between the stator and the rotor So that the air is blown.

According to the present invention, the electric scooter including the wheel having the heat radiating function according to the present invention can drive the front wheel or the rear wheel by adopting the in-wheel motor as the driving driving unit, It is possible to realize stable operation and control of the motor and also to improve the lifetime of the in-wheel motor.

1 is a front perspective view of an electric scooter according to an embodiment of the present invention;
2 is a rear perspective view of an electric scooter according to an embodiment of the present invention;
3 is a perspective view of a rear wheel steering unit according to an embodiment of the present invention.
4 is a block diagram of a main part of an electric scooter according to an embodiment of the present invention.
5 is a conceptual diagram of a normal traveling mode according to an embodiment of the present invention.
6 is a conceptual diagram of a rotating mode according to an embodiment of the present invention.
7 is a conceptual diagram of a steering interlocking mode according to an embodiment of the present invention.
8 is a perspective view of a main part of a rear wheel according to an embodiment of the present invention.
9 is a front view of a main portion of a rear wheel according to an embodiment of the present invention;
10 is a perspective view of a tilting angle adjusting unit according to an embodiment of the present invention.
11 is a side view of a tilting state of an electric scooter according to an embodiment of the present invention.
Fig. 12 is a perspective view showing a detachable structure of an electric scooter according to an embodiment of the present invention. Fig.
13 is a cross-sectional view of a driving drive unit according to an embodiment of the present invention

Hereinafter, an electric scooter according to the present invention will be described in detail with reference to embodiments shown in the drawings.

FIG. 1 is a front perspective view of an electric scooter according to an embodiment of the present invention, FIG. 2 is a rear perspective view of an electric scooter according to an embodiment of the present invention, FIG. 3 is a rear view of a rear wheel steering according to an embodiment of the present invention, 5 is a conceptual diagram of a normal traveling mode according to an embodiment of the present invention, and FIG. 6 is a schematic view of an embodiment of an electric scooter according to an embodiment of the present invention. FIG. 7 is a conceptual diagram of a steering interlocking mode according to an embodiment of the present invention, FIG. 8 is a perspective view of a main portion of a rear wheel according to an embodiment of the present invention, FIG. FIG. 10 is a perspective view of a tilting angle adjusting unit according to an embodiment of the present invention, FIG. 11 is a side view of a tilting state of an electric scooter according to an embodiment of the present invention, FIG. Fig. 12 is a cross- Exemplary is a perspective view showing a detachable structure for an electric scooter according to the embodiment, Figure 13 is a cross-sectional view of the running drive unit according to one embodiment of the present invention.

1 to 13, an electric scooter according to an embodiment of the present invention includes a base frame 10, a front wheel 20, a rear wheel 30, a steering angle adjuster 40, A driving unit 60, a mode selection unit 70, and a driving control unit 80. The control unit 50 includes a control unit 50, a driving unit 60, a mode selection unit 70,

The base frame 10 serves as a skeleton of the electric scooter according to the present invention and includes a fork support plate 11, a post connection plate 12, a locking hook 13, a rear wheel coupling housing 14, A lock pin 15, a seat 16, and a foot plate 17. [0031]

The fork support plate 11 is horizontally formed on the front side of the base frame 10 so that the fork 414 on which the front wheel 21 is mounted is rotatably supported for steering.

The post connection plate 12 is bent at both ends of the fork support plate 11 and extends upward so that the handle post cover 51 of the tilting angle control unit 50, which will be described later, .

The hooking hook 13 is formed to be hooked on a hooking hinge shaft 321 formed on the front side of the rear wheel body 32 from the rear side of the base plate 10.

The rear wheel coupling housing 14 is configured such that the base frame 10 or the rear wheel portion 30 is engaged with the engagement hinge shaft 321 in a state in which the engagement hook 13 is engaged with the engagement hinge shaft 321, The engaging protrusion 322 protruding in front of the rear wheel body 32 is inserted and engaged.

The lock pin 15 is supported on the upper surface of the rear wheel coupling housing 14 and is inserted into the rear wheel coupling housing 14 by an external force in a state where the fitting projection 322 is inserted into the rear wheel coupling housing 14 321 and 322. The rear wheel coupling housing 14 and the fitting protrusion 322 are fixed to each other.

In addition, in the present invention, when the fitting protrusion 322 and the rear wheel coupling housing 14 are coupled to each other to be engaged with each other, an electric wiring is connected between the base frame 10 and the rear wheel portion 30 .

12, according to the present invention, the rear side of the base frame 10 and the front side of the rear wheel body 32 are mutually engaged and disengaged The base frame 10 and the rear wheel part 30 can be mounted on the vehicle while they are separated from each other so that the base frame 10 and the rear wheel part 30 can be moved, Can be easily combined and used.

The seat 16 is configured to allow a user to sit, and the footrest 17 is configured to put a user's foot on the road.

The front wheel 20 has a front wheel 21 rotatably rotatable relative to the ground on the front side of the base frame 10.

The steering angle of the front wheel 21 is adjusted by the front wheel steering unit 41 described later.

The rear wheel unit 30 includes a rear wheel 31 rotatably rotatable with respect to the ground on the rear side of the base frame 10.

The steering angle of the rear wheel 31 is regulated by a rear wheel steering unit 42 to be described later.

An electric scooter according to an embodiment of the present invention includes a front wheel 21 and a rear wheel 31. The rear wheel 311 includes a rear wheel 311 and a rear wheel 312, .

The first rear wheel 311 and the second rear wheel 312 are spaced apart from each other in a direction intersecting the longitudinal direction of the base frame 10 and are disposed below the rear ends of the rear body 32.

The rear wheel portion 30 includes a rear wheel body 32, a suspension 33, and a rotation restricting stopper 34. [

The rear wheel body 32 is connected to the rear side of the base frame 10 and functions as a support for the suspension 33 to be connected thereto.

12, the rear wheel body 32 according to an embodiment of the present invention includes a hinge shaft 321 which is long in the left and right direction on the front side, And a fitting protrusion 322 protruding forward from the base frame 10 and formed with a locking pin insertion hole 322a is detachably connected to the rear side of the base frame 10, The detailed description thereof will be omitted.

In addition, in the embodiment of the present invention, the components constituting the rear wheel steering unit 42 shown in FIG. 3 are built in the rear wheel body 32.

The suspension 33 absorbs an impact from the road surface and connects the rear wheel 31 to the rear wheel body 32. The knuckle 331 and the upper arm 332, A lower arm 333, a pivot housing 334, a shock absorber 335, and a coil spring 336.

The upper knuckle 331 is configured to mount the rear wheel 31 and the upper arm 332 and the lower arm 333 are hingedly connected to the upper and lower ends, respectively.

One end of the upper arm 332 is hingedly connected to the knuckle 331 on the rotational axis of the rear wheel 31 mounted on the knuckle 331.

One end of the lower arm 333 is hingedly connected to the knuckle 331 below the rotational axis of the rear wheel 31 mounted on the knuckle 331.

That is, the suspension 33 according to an embodiment of the present invention is a double wishbone type suspension 33 that is provided with the upper arm 332 and the lower arm 333 to ensure a comfortable ride feeling .

The upper arm 332 and the lower arm 333 are hingedly connected to the other end of the pivot housing 334 and the upper end of the upper arm 332 is rotatable about the rear wheel pivot shaft 421 It is a connected configuration.

The pivot housing 334 according to an embodiment of the present invention includes a horizontal portion 334a formed vertically to the rear wheel pivot shaft 421 at an upper end to which the rear wheel pivot shaft 421 is connected, A vertical extension part 334b which is bent downward from one end of the upper extension part 334a and connected to the upper end of the shock absorber 335 and a lower extension part 334b projecting to one side of the vertical extension part 334b, And an upper hinge portion 334c and a lower hinge portion 334d to which the other ends of the lower arm 333 are hinge-connected, respectively.

The pivot housing 334 has the rear wheel 31 disposed at a lower portion of the horizontal portion 334a and the vertical extension portion 334b disposed at an inner side of the rear wheel 31, And the lower hinge portion 334c and the lower hinge portion 334d protrude from the vertical extension portion 334b in a direction opposite to the direction in which the rear wheel 31 is disposed.

The suspension 33 according to the embodiment of the present invention can steer the rear wheel pivot shaft 421 with the center of rotation while the upper hinge portion 334c and the lower hinge portion 334c, And the protruding portion 334d is protruded to one side of the vertical extension portion 334b. Thus, the double wishbone type suspension structure can be maintained at the most compact size.

The lower end of the shock absorber 335 is connected to the lower arm 333 and the upper end of the shock absorber 335 is fixed to the pivot housing 334.

By adopting a structure in which the upper end of the shock absorber 335 is fixed to the pivot housing 334, the suspension 33 according to an embodiment of the present invention is capable of steering the rear wheel pivot shaft 421 .

The coil spring 336 is installed to surround the shock absorber 335.

The rotation restricting stopper 34 is disposed between the rear wheel body 32 and the horizontal portion 334a of the pivot housing 334 so that the pivot housing 334 is rotated about the rear wheel pivot shaft 421 The stopper protrusion 341 protruded upward from the horizontal portion 334a of the pivot housing 334 and the stopper protrusion 341 protruding upward from the horizontal portion 334a of the pivot housing 334, And a stopper latching protrusion 342 formed on the lower surface of the stopper protrusion 341 so as to engage with the stopper protrusion 341.

The steering angle adjusting unit 40 is configured to adjust the steering angle of the front wheel 21 or the rear wheel 31 by a user's operation. In the embodiment of the present invention, the front wheel steering unit 41, (42).

The front wheel steering unit 41 is configured to adjust the steering angle of the front wheel 21 so that the front wheel 21 is rotatably supported at the lower end of the front wheel steering unit 41, A handle post 415 connected to the upper end of the fork 414 at a lower end to extend upward and a steering post 415 extending upward from the fork 414, A handle 412 connected to the upper end of the handle post 415 so as to be able to adjust the steering angle of the steering wheel 411 and a steering wheel 415 connected directly or indirectly to the front wheel steering shaft 411, And a front wheel steering angle sensor 413 for detecting a steering angle of the front wheel steering angle sensor 413.

The handle post 415 may be tilted back and forth with respect to the longitudinal direction of the base frame 10 by a user's operation and a lower end of the handle post 415 may be connected to the fork 414 to transmit rotational force to the fork 414. [ And is connected to the upper end portion and the universal joint 416.

The user can easily adjust the steering angle of the front wheel 21 by the configuration of the front wheel steering unit 41 as described above and can adjust the steering angle of the front wheel 21 by the electric power .

The rear wheel steering unit 42 is configured to adjust the steering angle of the rear wheel 31. In one embodiment of the present invention, the rear wheel steering unit 42 is connected to the rear wheel pivot shaft 421 by a belt 424, A rear wheel steering motor 422 capable of rotating the pivot shaft 421 and a rear wheel steering motor 422 directly or indirectly connected to the rear wheel pivot shaft 421 to rotate the rear wheel 31 from the amount of rotation of the rear wheel pivot shaft 421. [ And a rear wheel steering angle sensor 423 for detecting the steering angle of the rear wheel.

The rear wheel 31 is configured to be able to adjust the steering angle of the rear wheel 31 by the motor force according to the configuration of the rear wheel steering unit 42. In an embodiment of the present invention, And a second rear wheel 312. The first rear wheel 311 and the second rear wheel 312 are each configured to be able to adjust the steering angle.

The tilting angle adjusting unit 50 is configured to fix and unlock the handle post 415 which is connected to the fork 414 by a universal joint 416 and is tilted at a predetermined angle. A pin insertion hole 52, a tilting guide hole 53, a pin releasing ring 54 and a QR lever 55 as shown in FIG. 10 .

The handle post 41 is wrapped around the handle post 415 so that the handle post 415 can be tilted back and forth integrally with the handle post 415 without constraining the left and right rotation of the handle post 415, And the tilting hinge axis H is hingedly connected to the tilting hinge 12 at the center of rotation.

The pin insertion hole 52 is formed to pass through the post connection plate 12 or the handle post cover 51 while being spaced from the tilting hinge axis H by a predetermined distance. Is configured to form the post connection plate (12).

The tilting guide hole 53 may be formed in the post connecting plate 12 or the post connecting plate 12 in which the pin insertion hole 52 is not formed along the rotational locus of the pin insertion hole 52 when the handle post 415 is tilted back and forth And is formed on the handle post cover 51 in a configuration of the handle post cover 51 according to an embodiment of the present invention.

The insertion pin 54 passes through the pin insertion hole 52 and the tilting guide hole 53 and is fastened.

The pin release claw 55 is fastened to one end of the insertion pin 54 so that the insertion pin 54 is not released.

The QR lever 56 is fastened to the other end of the insertion pin 54 and the post connection plate 12 and the handle post cover 51 are pressed against each other by the operation of the user by the lever and the principle of the cam .

The user can easily adjust the tilting angle of the handle post 415 by the configuration of the tilting angle adjuster 50 as described above to adjust the position of the handle 412 in accordance with the body of the user, The handle post 415 is folded to minimize the volume as shown in FIG. 11, thereby facilitating mounting or storage on the vehicle.

The travel driving unit 60 is configured to rotate the front wheel 21 or the rear wheel 31 by a power source such as a battery (not shown) built in the base frame 10, And includes an in-wheel motor 61 and a heat dissipating means 62 as shown in Fig.

The in-wheel motor 61 has a stator 611 fixed to the shaft of the front wheel 21 or the rear wheel 31 for rotation, and a rotor 612, which rotates around the stator 611, 21) or a rim wheel of the rear wheel 31 is connected.

A plurality of coils are arranged in the circumferential direction of the stator 611 and a plurality of magnets are arranged in the circumferential direction of the rotor 612.

When electric power is sequentially supplied to the coils of the stator 611, a magnetic field is generated between the coils and the magnets to generate a torque, that is, a motor torque, The front wheel 21 or the rear wheel 31 are integrally rotated so that driving can be generated between the front wheel 21 and the road surface.

12 and 13, the heat dissipating means 62 includes a heat dissipating fin 621, a blowing fan 622, and a blowing fan 622. The heat dissipating means 621 is configured to dissipate heat generated in the in- ).

The radiating fins 621 are configured such that a plurality of the radiating fins 621 are radially spread from the center on the rim wheel and the protrusions are in contact with the air to be cooled.

The air blowing fan 622 is configured to cool the in-wheel motor 61 by blowing air to a gap between the stator 611 and the rotor 612. In an embodiment of the present invention, the cooling fan 621 An air induction slope is formed in the rotor 612 so that the radiating fin 621 blows air to the gap between the stator 611 and the rotor 612 when the rim wheel is rotated.

The front wheel 21 or the rear wheel 31 can be driven with a simple structure by adopting the in-wheel motor 61 as the traveling driving unit 60. As a result of the configuration of the heat dissipating means 62, The stable operation and control of the in-wheel motor 61 can be realized, and the lifetime of the in-wheel motor 1 can be improved.

The mode selection unit 70 is configured to select an operation mode by a user's operation. In an embodiment of the present invention, the mode selection unit 70 is implemented as a cluster provided on the front surface of the handle 412 for convenience of operation.

In one embodiment of the present invention, the operation mode selectable by the mode selection unit 70 includes a normal traveling mode 71, a rotation mode 72, and a steering interlock mode 73.

The travel control unit 80 controls the steering angle control unit 40 and the travel driving unit 60 according to the operation mode selected by the mode selection unit 70. [

5, when the mode selecting unit 70 selects the normal traveling mode 71, the steering control unit 80 determines that the steering angle of the rear wheel 31 is greater than the steering angle of the rear wheel 31, And controls the rear wheel steering unit 42 so as to be fixed in a direction parallel to the longitudinal direction.

In this case, the user can steer by operating the front wheel steering unit 41 by an external force.

6, when the rotation mode 71 is selected in the mode selection unit 70, the travel control unit 80 controls the front wheels 21 and the rear wheels 31, 311, and 312, Controls the front wheel steering unit (41) and the rear wheel steering unit (42) so that the rear wheel steering unit (41) is disposed in the tangential direction of a power source for connecting three points in contact with the ground.

When the steering interlocking mode 73 is selected in the mode selection unit 70, the travel control unit 80 determines whether the steering angle of the rear wheel 31 is greater than the steering angle detected by the front wheel steering angle sensor 413 And the rear wheel steering unit 42 is controlled to correspond to the steering angle of the rear wheel steering unit 42.

That is, when the steering interlocking mode 73 is selected in the mode selection unit 70, the travel control unit 80 receives the steering angle change signal from the front wheel steering angle sensor 413 and operates the rear wheel steering motor 422 And when the steering angle of the rear wheel 31 sensed by the rear wheel steering angle sensor 423 coincides with the steering angle of the front wheel 21 sensed by the front wheel steering angle sensor 413, the operation of the rear wheel steering motor 422 .

The electric scooter according to the present invention is capable of various steering by the organic combination of the mode selection unit 70 and the travel control unit 80 as described above and is capable of steering variously, It is possible to move and rotate in a desired direction in a boarding state without getting off.

The electric scooter described above and shown in the drawings is only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

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Claims (3)

A base frame; A front wheel having a front wheel rotatable with respect to the ground on the front side of the base frame; A rear wheel having a rear wheel rotatable with respect to the ground on the rear side of the base frame; A steering angle adjusting unit for adjusting a steering angle of the front wheel or the rear wheel by a user's operation; A driving unit for rotating the front wheel or the rear wheel by a power source; The electric scooter according to claim 1,
The traveling driving unit includes an in-wheel motor having a stator fixed to a shaft of the front wheel or the rear wheel for rotation, and a rotor rotatably surrounding the stator, wherein the front wheel or the rear wheel is connected to a rim wheel,
And a heat radiating means for radiating heat generated in the in-wheel motor,
Wherein the heat dissipating means comprises a plurality of heat dissipation fins extending radially from the center on the rim wheel and the protrusions being in contact with the air.
The method according to claim 1,
Wherein the heat radiating means further comprises a blowing fan for blowing air to a gap between the stator and the rotor.
3. The method of claim 2,
Wherein the ventilation fan is configured such that when the rim wheel is rotated, the radiating fin is configured to blow air to a gap between the stator and the rotor, the air induction slope being formed in the radiating fin.

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