KR101672459B1 - Front-wheel drive type bicycle - Google Patents

Abstract

Start with the front-wheel drive bike. The present invention relates to a car body; A rotating shaft supported by the fork of the car and a front wheel installed on the rotating shaft; A drive sprocket rotated by pedaling; A crank arm for pivotally rotating the rotary shaft and the drive sprocket; A rotating body supported by the fork so as to receive power from the driving sprocket and transmit the power to the front wheel; A driven sprocket which receives power from the drive sprocket and rotates; And a wheel on which the power of the rotating body is received to rotate and to which a tire is mounted, thereby reducing the overall length of the bicycle by folding the front wheels of the driving devices or folding and folding the vehicle body by concentrating the pedaling power on the front wheels. And provides a safe bicycle that does not fall down easily by lowering the center of the sitting posture.

Description

Front-wheel drive bike {FRONT-WHEEL DRIVE TYPE BICYCLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a front-wheel drive bicycle, and more particularly, to a front-wheel drive bicycle capable of shortening the overall length of a bicycle by transmitting a driving force generated by a rolling cloud to a front wheel,

The use and interest of bicycles has been increasing as a means of reducing vehicle driving and getting to their destination quickly, and more use is needed.

In a typical bicycle, the front wheel is steered and the rear wheel is driven. The person who moves the tackle moves the force of the foot to the crank mechanism and turns it into the rotational force, which is then transmitted to the rear wheel through a chain hooked to the large sprocket.

The frame that forms the body of the bicycle is diamond or diamond shape and it is an important factor that determines the performance. Usually, the head tube, the top tube, the down tube, the seat stay, , And Chain Stay. The shape, length, and thickness of each body depend on the frame geometry of each body.

The restoring force, stability, and steering ability of the front tire that rubs the road surface depend on the inclination angle (casting angle) of the head tube. The front wheel is supported by a hub located between the two legs of the front fork, with the bearing on the left and right, which affects the bike performance. The hub axes of the front and rear wheels are fixed to the front ends of the front fork and rear fork, respectively, and the body, the torso, the cargo weight and the like are supported by these two shafts, and the transmission mechanism is adapted to the conditions .

The reason why the bicycle can run without falling is because the person who shot the car balances unconsciously. Mechanically, it depends on the role of bicycle stability and career maintenance including the casting angle of the front part, the side force of the tire, and the weight effect of the front wheel, but the feedback function of the person is greatest.

Such a conventional bicycle is required to maintain the equilibrium in accordance with the feedback of a person in order to travel in a straight line state, so that the skill of the person is important, and the possibility that the person having a low skill level falls is likely to fall down .

In addition, since the pedal shaft is positioned substantially vertically downward from the seat, it is difficult to ride the bicycle in a comfortable sitting position on the seat. Also, sitting on the seat and getting the rotational power by stepping on the pedal was also limited in the transmission of the leg force, and the waist was bent when the handle was gripped, so that there was a problem of back pain, and it was inconvenient when storing, There was a problem. There are a number of proposals for folding bikes that can be folded or unfolded for transport and portability, but the structure is complex.
Folding bicycles are disclosed in Korean Patent Laid-open Nos. 10-2007-0121932 and 10-2010-0035997, and front wheel drive bicycles are disclosed in Korean Patent Publication No. 1991-0001413.

Patent Document 1: Korean Patent Laid-Open No. 10-2007-0121932 (Published Date: 2007.12.28) Patent Document 2: Korean Patent Publication No. 10-2010-0035997 (Published Date: Apr. 07, 2010) Patent Document 3: Korean Patent Publication No. 1991-0001413 (public announcement date: March 30, 1991)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems as described above, and it is an object of the present invention to provide a driving device for a vehicle, The present invention provides a front-wheel drive bicycle which can be folded and unfolded easily, and the center of the sitting posture can be lowered to reduce a fall.

A front wheel rolling bike according to an embodiment of the present invention includes a body including a fork for supporting a front wheel and a support frame for supporting a rear wheel; A rotating shaft supported by the fork and a front wheel installed on the rotating shaft; A driving sprocket coupled to the rotating shaft and rotated by pedaling; A crank arm for pivotally rotating the rotary shaft and the drive sprocket; A rotating body supported by the fork so as to receive power from the driving sprocket and transmit the power to the front wheel; A driven sprocket for rotating the shaft by receiving power from the drive sprocket; And a wheel that is rotated by receiving the power of the rotating body and is mounted with a tire, the front wheel rolling bicycle comprising:
Wherein the seat comprises a seat supported by a seat stay and includes a steering wheel for steering the fork, the seat being composed of a chair-type seat for lowering the center of the body with respect to a sitting posture, the front wheel being divided by a tire and a wheel, Wherein the wheel is formed by a spoke wheel and the wheel is formed by a gear tooth surface on which an inner circumferential surface of the rim engages with the rotating body and the transmission sprocket is provided with a plurality of driven sprockets.

The front-wheel drive bicycle according to the embodiment of the present invention is characterized in that the rotating body is composed of a toothed gear rotated by a shaft.

The front wheel rolling bicycle according to the embodiment of the present invention is characterized in that the wheel is constituted by a gear chain in which the inner peripheral surface of the rim engages with the rotating body.

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A front rolling bike according to an embodiment of the present invention is characterized in that a key is provided on a rotary shaft and a shaft, and a key groove is formed in the drive sprocket, the rotary body, and the driven sprocket.

The front wheel rolling bike according to the embodiment of the present invention is characterized in that the driving sprocket and the driven sprocket are connected by any one of power transmission means selected from a chain or a belt.

The front wheel rolling bicycle according to the embodiment of the present invention is characterized in that the support frame connecting the front wheel and the rear wheel includes a folded portion including a hinge shaft or a hinge piece.

The front-wheel drive bicycle according to the present invention has the effect of enabling safe running by preventing the driver from falling down by lowering his / her body center based on the sitting position on the seat while holding the handle as a chair type. In addition, sitting on the seat in a relaxed position, the front wheel can be rolled by stepping on the pedal, thus enabling steering of the steering wheel without bending the waist and reducing fatigue. In addition, there is an effect that the driving device is concentrated on the front wheel to freely fold and unfold the vehicle body.

1 is a schematic view of a front-wheel drive bicycle according to an embodiment of the present invention;
2 is a detailed view of a front wheel portion according to an embodiment of the present invention.
3 is a cross-sectional view of a front wheel portion according to an embodiment of the present invention.
4 is an exploded perspective view of a front wheel according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG.

1 is a schematic view of a front-wheel drive bicycle according to an embodiment of the present invention. 1, the front wheel F is supported by the fork 100, the rear wheel R is supported by the support frame 110, the seat 220 is supported by the seat stay 230, 240 are adapted to steer the fork 100.

Since the fork 100, the support frame 110, and the seat stay 230 are classified as car bodies, the overall shape, length shape, thickness, and the like can be designed differently according to the frame geometry of each vehicle body. The vehicle body shape shown in Fig. 1 is a representative example, and may be modified into various shapes and structures although not shown in the drawings.

2 is a detailed view showing a front wheel portion of a front-wheel drive bicycle according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a front-wheel drive bicycle according to an embodiment of the present invention includes:

The vehicle body includes a fork 100 for supporting the front wheel F and a support frame 110 for supporting the rear wheel R. The front wheel F is mounted on a rotary shaft 120 supported by the fork 100 .

The driving sprocket 130 is coupled to the rotating shaft 120 and rotates by pedaling. The crank arm 140 rotates the rotating shaft 120 and the driving sprocket 130 by pedaling. The crank arm 140 is provided with a pedal 141 for receiving a pressing force.

A rotating body 150 supported on the fork 100 and a shaft 160 for rotatably coupling the rotating body 150 to receive the power from the drive sprocket 130 and to transmit the power to the front wheel F are constructed , And the shaft 160 is configured to receive power from the drive sprocket 130 and rotate.

The shaft 160 is configured to rotate by the driven sprocket 170. The wheel 180 is rotated by receiving the power of the rotating body 150 and mounted on the tire 181 to function as a front wheel F. [

3 is a cross-sectional view of a front wheel portion of a front-wheel drive bicycle according to an embodiment of the present invention. 4 is an exploded perspective view illustrating a front wheel portion of a front-wheel drive bicycle according to an embodiment of the present invention.

Referring to FIGS. 3 and 4, the rotating body 150 is configured to engage with and engage with a tooth surface 182 of the wheel 180 as an example of a tooth gear rotated by a shaft 160.

The front wheel F is divided into a tire 181 and a wheel 180 and the wheel 180 may be configured as a spoke wheel type in which a plurality of spokes 185 are arranged. Referring to Fig. 4, an example in which the spokes 185 are arranged circumferentially with the wheel hub 184 in a zippered manner is shown as a spoke wheel.

Here, the wheel 180 is formed by a gear tooth surface 182 whose inner circumferential surface of the rim 183 engages with the rotating body 150. The wheel 180 may be constructed by mounting a gear chain (not shown) on the inner circumferential surface of the rim 183 to engage with the rotating body 150, though not shown in the drawings. When the chain gear is constructed along the inner circumferential surface of the rim 183 of the wheel 180, the inner circumferential surface of the rim of the wheel 180 may not be machined into the tooth surface 182.

Also, the driven sprocket 170 may be a transmission gear in which a plurality of driven sprockets are arranged. If the driven sprocket 170 is configured in the form of a transmission type, the leg load of the pedal 141, which rotates the driving sprocket 130, can be adjusted according to driving conditions. The transmission gear used here may be similar to or the same as that of a conventional transmission mounted on a bicycle, so that the transmission principle and the specific structure are omitted.

The rotary shaft 120 and the shaft 160 are provided with a key and a key groove is formed in the drive sprocket 130 and the rotary body 150 and the driven sprocket 170 to prevent rotation slip when the rotary shaft and the shaft rotate. do.

Although not shown in the figure, the distance between the fork 100, the wheel hub 184, the drive sprocket 130, and the crank arm 140, through which the rotating shaft 120 passes, A bearing can be installed to enable lubrication rotation of the front wheels.

In addition, since the drive sprocket 130 and the driven sprocket 170 are spaced at a distance from each other, any one of the power transmitting means 190 selected from a chain or a belt is required for power transmission. Chains are often used in this field, and belts can be selected for high-strength chain belts or rotationally powered transmissions with less power loss.

4, the front wheel rolling bicycle according to the embodiment of the present invention includes a hinge shaft 210 or a hinge piece in a support frame 110 connecting the front wheel F and the rear wheel R The folded portion 200 can be formed. The length of the entire body can be reduced to about 1/2 when the folding unit 200 is placed at the midway point between the front wheel and the rear wheel. Since the driving devices for driving the bicycle are concentrated on the front wheel, Position and structure can be freely selected and designed.

The front-wheel drive bicycle according to the embodiment of the present invention directly drives the front wheel F by driving power generated by the pedal swing. The running of the front-wheel drive bike according to the embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG.

The front wheel F is supported by the fork 100 and performs forward rolling motion when the clockwise forward rotational force of the crank arm 140 is applied.

When a person sitting on the seat 220 extends forward, both feet touch the pedal 141 that rests on the crank arm 140. In this state, when the pedal 141 is turned while moving the legs, the drive sprocket 130 rotates. The force for driving the drive sprocket 130 is transmitted to the driven sprocket 170 which is the load side. If the driven sprocket 170 is a transmission type, the front wheel can be turned while freely adjusting the pedal's turning force.

The rotation of the driving sprocket 130 causes the rotation axis 120 to rotate and the wheel 180 coupled to the rotation axis 120 rotates along the rotation axis 120 to generate the forward driving force of the front wheel F. A normal tire 181 is mounted on the rim 183 of the wheel 180 and a normal ratchet wheel is mounted on the shaft 160 on which the driven sprocket 170 is mounted to prevent reverse running .

When the drive sprocket 130 is turned by pedaling, a rotational force is transmitted to the driven sprocket 170 mounted on the shaft 160 through the power transmitting means 190 and the driven sprocket 170 rotates the shaft 160. The rotation of the shaft 160 continuously rotates the rotating body 150 in contact with the tooth surface 182 of the wheel 180 and the rotational force thereof is represented by the forward driving force for turning the front wheel F. [ Therefore, the forward driving force of the front wheel F appears as a force to which the driving sprocket 130 is turned and a rotational force of the rotating body 150 is added.

The front-wheel drive bicycle according to the embodiment of the present invention is able to place the middle portion of the vehicle body in the folded portion 200 since all the driving devices for obtaining the driving force are disposed on the front wheel F. As a result, the entire length of the bicycle can be shortened, folded and extended when transporting, storing and carrying.

The sheet 220 can be designed in a chair-like structure. The chair-type seat 220 is safe because it is less likely to fall even when a person having a low driving skill is operated due to a low body center based on a sitting position, and can steer without holding the waist when the handle 240 is gripped Reduces back pain and reduces fatigue by reducing posture inconvenience during driving.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, .

100: fork 110: support frame
120: rotating shaft 130: driving sprocket
140: crank arm 141: pedal
150: rotating body 160: shaft
170: driven sprocket 180: wheel
190: Power transmission means 181: Tire
182: tooth surface 183: rim
184: wheel hub 185: spoke
200: Bond attachment 210: Hinge shaft
220: Seat 230: Seat stay
240: Handle

Claims (9)

A body including a fork for supporting a front wheel and a support frame for supporting a rear wheel; A rotating shaft supported by the fork and a front wheel installed on the rotating shaft; A driving sprocket coupled to the rotating shaft and rotated by pedaling; A crank arm for pivotally rotating the rotary shaft and the drive sprocket; A rotating body supported by the fork so as to receive power from the driving sprocket and transmit the power to the front wheel; A driven sprocket for rotating the shaft by receiving power from the drive sprocket; And a wheel that is rotated by receiving the power of the rotating body and is mounted with a tire, the front wheel rolling bicycle comprising:
Wherein the seat comprises a seat supported by a seat stay and includes a steering wheel for steering the fork, the seat being composed of a chair-type seat for lowering the center of the body with respect to a sitting posture, the front wheel being divided by a tire and a wheel, Wherein the wheel comprises a spoke wheel and the wheel is formed by a gear tooth surface on which an inner circumferential surface of the rim engages with the rotating body, and the transmission sprocket is provided with a plurality of driven sprockets. The method according to claim 1,
Wherein the rotating body is a toothed gear rotated by a shaft. delete delete The method according to claim 1,
Wherein the wheel comprises a gear chain in which an inner circumferential surface of the rim engages with the rotating body. delete The method according to claim 1,
And a key is provided on the rotating shaft and the shaft, and a key groove is formed in the driving sprocket, the rotating body, and the driven sprocket. The method according to claim 1,
Wherein the drive sprocket and the driven sprocket are connected by a power transmission means selected from a chain or a belt. The method according to claim 1,
And the support frame connecting the front wheel and the rear wheel comprises a folding portion including a hinge shaft or a hinge piece.

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