KR101709132B1 - Front-wheel drive type safty bicycle - Google Patents

Abstract

Starts with front-wheel-drive safety bike. The present invention relates to a car body including a fork for supporting a front wheel and a support frame for supporting a rear wheel; A drive sprocket coupled to the rotation center shaft of the front wheel and rotated; A crank arm with a pedal that drives the drive sprocket; Driven sprocket linked to drive sprocket; A first hinge shaft for fixing the frame movably and a hinge piece for coupling the first hinge shaft; A second hinge shaft connecting the hinge piece and the support frame; And a seat stay which is seated on the upper side of the support frame and which supports the seat on the rear wheel, whereby the pedaling power can be transmitted directly to the front wheel or can be driven by the driving motor, and the overall length of the bicycle can be shortened to facilitate folding and unfolding The center of the sitting position is lowered to provide a safe bike that does not fall over.

Description

FRONT-WHEEL DRIVE TYPE SAFTY BICYCLE

The present invention relates to a front-wheel-drive safety bicycle, and more particularly, to a front-wheel-drive safety bicycle that shortens the entire length of a bicycle by transmitting a driving force generated by a rolling cloud to the front wheel, facilitates folding and unfolding, .

Vehicles such as automobiles have worsened the environment due to pollution of the atmosphere and the environment caused by exhaust gas, and the reduction of green spaces due to the development of mountainside to meet the demand of the roads. 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.

Generally, the bike has a drive unit that can steer the front wheels and rear wheels. 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 between the two legs of the front fork, with a hub on the left and right of the bearing, which affects the performance of the bicycle.

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 vehicle body, the torso, and the cargo weight are supported by these two axles. The transmission mechanism is adapted to the conditions So that it can be adjusted.

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 the bicycle stability and career maintenance including the casting angle of the front wheel part, the side force of the tire, the weight effect of the front wheel, etc., and 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 when a person with a low skill level is driving, There is a disadvantage in that the driving force is dependent on the force of turning the rear wheel and the driving force is decreased in an uphill road or an eye road.

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.

In addition, there is a limitation in the transmission of the leg force, and the handle structure is configured to bend the waist, resulting in discomfort in posture and back pain caused by running for a long time.

There are a number of proposals for a foldable bicycle that can be folded or unfolded when storing, transporting and carrying bicycles, but the structure is complicated.

On the other hand, Korean Patent Laid-Open Publication No. 10-2006-0086606 discloses a front-wheel drive bicycle. Korean Patent Application No. 10-2003-0051564 discloses a front wheel drive motorcycle for driving a front wheel, Korean Patent Laid-open Nos. 10-2007-0121932 and 10-2010-0035997 disclose a foldable bicycle .

Patent Literature 1. Korean Patent Application No. 10-2003-0051564 (Public Notification. Nov. 14, 2004) Patent Document 2: Korean Patent Laid-Open No. 10-2007-0121932 (Published on December 28, 2007) Patent Document 3: Korean Patent Laid-Open No. 10-2010-0035997 (Published Date: 2010.04.07)

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 bicycle which is able to be folded and unfolded while driving the front wheel, The present invention is directed to providing a front-wheel-drive safety bicycle which can reduce the fall of the center of the front-wheel drive bicycle.

A front-wheel-drive safety bicycle 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 driving sprocket coupled to the rotational center shaft of the front wheel and rotated; A crank arm having a pedal that rotates along the rotation center axis and turns the drive sprocket; A driven sprocket spaced apart from the drive sprocket and coupled to the body frame by a rotation shaft to interlock with the drive sprocket; A hinge piece for engaging a first hinge axis and a first hinge axis for fixing the frame provided with the driven sprocket so as to be movable; A second hinge shaft connecting the hinge piece and the support frame so that the support frame can be folded and unfolded around the hinge piece; A seat mounted on an upper side of the support frame, and a seat stay for supporting the seat around a rear wheel.
The drive sprocket and the driven sprocket of the front-wheel-drive safety bicycle according to the embodiment of the present invention are formed of a chain wheel having a circumferential surface capable of hanging a chain, wherein the diameter of the drive sprocket is larger than that of the driven sprocket, The drive sprocket includes a first chain wheel and a second chain wheel, and the driven sprocket includes a first chain wheel of the drive sprocket and a chain wheel corresponding to the second chain wheel, .

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In the front-wheel-drive safety bicycle according to the embodiment of the present invention, a driving motor is installed along a rotation center axis of a rear wheel, and a battery pack for supplying power to the driving motor is incorporated in a lower portion of the seat. The front bicycle safety bicycle being located at the rear portion and having an inclination that the backrest is inclined toward the rear wheel.

In addition, the front-wheel-drive safety bicycle according to the embodiment of the present invention is characterized in that the front-wheel-drive safety bicycle is provided with a cover for blocking the eyes and rain or sunlight on the upper part of the seat.

Further, a shielding means of a front-wheel-drive safety bicycle according to an embodiment of the present invention includes: a winding drum installed at one end of a seat back; A shield which is wound or unwound around the winding drum; And a fixing part for fixing one end of the shield to the vehicle body.

The front-wheel-drive safety bicycle according to the present invention is a chair-type safety bicycle which has a low center of gravity based on a sitting position on the seat, and can be safely traveled even when a person having a low skill level falls.

According to the present invention, the front-wheel-drive safety bicycle according to the present invention can sit on the seat in a comfortable posture and roll the front wheel by rolling the pedal, so that it is possible to steer the steering wheel without bending the waist, thereby improving the inconvenience of the driving posture, And reduce fatigue.

The front-wheel-drive safety bicycle according to the present invention has a drive motor installed on the rear wheel drive shaft, and can simultaneously drive the front wheel and the rear wheel simultaneously or selectively drive the front and rear wheels as needed, thereby facilitating a slippery road such as an uphill road and an eye- .

1 is a schematic view of a front-wheel-drive safety bicycle according to an embodiment of the present invention;
2 is a sectional view taken along line A-A 'in Fig.
FIG. 3 is a reference view of a use state of a front-wheel-drive safety bicycle 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 3. FIG.

1 is a schematic diagram of a front-wheel-drive safety bicycle according to an embodiment of the present invention. Referring to FIG. 1, the front wheel F is supported by the fork 100, the rear wheel R is supported by the support frame 110, and the seat 220 is supported by the seat stay 230. 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. Is a representative example.

2 is a cross-sectional view illustrating a driving sprocket and a crank arm of a front-wheel-drive safety bicycle according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, the front-wheel-drive safety bicycle according to the embodiment of the present invention includes a driving sprocket 130 that is coupled to the rotational center shaft 120 of the front wheel F and rotates.

A crank arm 150 having a pedal 140 for rotating the driving sprocket 130 along the rotational center axis 120 of the front wheel F is formed.

A driven sprocket 180 which is spaced apart from the drive sprocket 130 and is coupled to the body frame 160 by a rotation shaft 170 and is linked to the drive sprocket 130 is formed.
Here, the configuration of the drive sprocket 130, the crank arm 150, and the driven sprocket 180 is one example of rolling the front wheel. In this connection, a front-wheel drive bicycle of Korean Patent Laid-Open Publication No. 10-2006-0086606 is disclosed. In either case, it is possible to transmit the driving force by the rolling cloud of the pedaling to the front wheel (F).
The present invention includes a first hinge shaft 190 for fixing the frame 160 in which the driven sprocket 180 is installed and a hinge piece 200 for coupling the first hinge shaft 190.

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The second hinge shaft 210 connects the hinge piece 200 and the support frame 110 so that the support frame 110 can be folded and unfolded around the hinge piece 200.

And a seat stay 230 for supporting the seat 200 about the rear wheel R. The seat stay 230 is mounted on the upper side of the support frame 110,

In addition, the drive sprocket 130 and the driven sprocket 180 of the front-wheel-drive safety bicycle according to the embodiment of the present invention preferably comprise a chain wheel having a tooth surface on which a circumferential surface can be engaged. The diameter of the drive sprocket 130 is preferably larger than that of the driven sprocket 180. The driven sprocket 180 may include a ratcheting wheel (not shown) that blocks reverse rotation driving along the rotating shaft 170. The driven sprocket 180 may include a transmission mechanism (not shown) 130 can be adjusted by controlling the amount of force required for pedaling. Here, 'Rachet' is a term used in the meaning of 'ratchet'.

The drive sprocket 130 may be composed of a first chain wheel 131 and a second chain wheel 132. In this case, the driven sprocket 180 is connected to the first chain wheel of the drive sprocket 130 And a chain wheel (not shown) corresponding to the first chain wheel 131 and the second chain wheel 132 may be connected through the chains 300 and 310, respectively. The chain wheel may consist of a "ratcheting" wheel. Here, 'Rachet' is a term used in the meaning of 'ratchet'.
When the drive sprocket (chain wheel) and the driven sprocket are configured with a ratcheting wheel, the driving force is transmitted only in the rolling direction as in a normal bicycle. Therefore, it is preferable that the drive sprocket and the driven sprocket are formed by a ratcheting wheel.
In the front-wheel-drive safety bicycle according to the embodiment of the present invention, the driving motor 250 may be installed along the rotation center shaft 240 of the rear wheel R. The characteristics of the electric bicycle can be obtained when the driving motor 250 is installed in the rear wheel R. When the vehicle is not pedaling or fatigue is high or when a slippery road such as an uphill road or a snowy road on a hill, F) and the rear wheel (R) at the same time. A battery pack 260 for supplying power to the driving motor 250 is preferably installed below the seat 220. In this case, it is not necessary to provide a separate support for supporting the seat 220.

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Preferably, the seat 220 is disposed at a rear portion of the handle 270 so that the seat back 280 is inclined toward the rear wheel. In this case, when sitting on the seat 220, the sitting posture is similar to that of sitting on a chair, and the legs can be extended forward to place the foot on the pedal 140, and can be pedaled in a comfortable posture using both feet.

Further, in the front-wheel-drive safety bicycle according to the embodiment of the present invention, the upper part of the seat 220 may be provided with a cover for shielding snow and rain or sunlight.

FIG. 3 is a reference view showing an example of installing and operating a screening means on a front-wheel-drive safety bicycle according to an embodiment of the present invention.

The shielding means includes a winding drum 320 provided at one end of the backrest 280 of the seat 220, a shield 330 wound around or unwound around the winding drum 320, And the fixing part 340 may be fixedly installed without any restriction. A cloth or a flexible film resin can be used as the visor 330. The visor 330 can be wrapped around the winding drum 320 when not in use, and can be taken out when needed.

In the front-wheel-drive safety bicycle according to the embodiment of the present invention, the driving force by the pedal rolling cloud is partially transmitted directly to the front wheel F and then traveled. The rear wheel R can be driven by the power of the driving motor 250 in accordance with the degree of fatigue because the rear wheel R can be driven by the power of the driving motor 250. The front wheel F and the rear wheel R) can be driven simultaneously to go to the destination easily.

Further, in the front-wheel-drive safety bicycle according to the embodiment of the present invention, the entire length of the bicycle is shortened, and it is easy to fold and unfold. The frame 160 having the driven sprocket 180 is coupled with the hinge piece 200 and the first hinge shaft 190 so that the frame 160 can move freely and be folded around the hinge pin. 200 and is folded or unfolded around the hinge pin of the second hinge shaft 210.

Accordingly, the vehicle body frame 160 and the support frame 110 can be easily folded about the hinge piece 200 and the hinge shaft, which is convenient for transportation and storage.

The seat 220 is a chair type structure and is safe because the body center is low based on the sitting position on the seat 220, so that even if a person having a low skill level is operated, the seat 220 is safe, Because it can hold and adjust, it does not have posture inconvenience when driving, reduces back pain and reduces fatigue.

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: rotation center shaft 130: drive sprocket
131: first chain wheel 132: second chain wheel
140: pedal 150: crank arm
160: Body frame 170:
180: driven sprocket 190: first hinge shaft
200: hinge piece 210: second hinge shaft
220: Seat 230: Seat stay
240: rotation center shaft 250: drive motor
260: Battery pack 270: Handle
280: Backrest 300.310: Chain
320: winding drum 330:

Claims (5)

A vehicle body including a fork supporting a front wheel and a support frame for supporting a rear wheel, a drive sprocket coupled to the rotation center shaft of the front wheel, a crank arm having a pedal rotating along the rotation center axis and driving the drive sprocket, A driven sprocket spaced apart from the driving sprocket and coupled to a body frame by a rotation shaft to interlock with the driving sprocket; and a driving sprocket and a driven sprocket including a ratcheting wheel,
The front-wheel-drive safety bicycle includes a first hinge shaft for fixing the frame provided with the driven sprocket so as to be movable, and a hinge piece for engaging the first hinge shaft; A second hinge shaft connecting the hinge piece and the support frame so that the support frame can be folded and unfolded around the hinge piece; A seat seated on an upper side of the support frame and a seat stay for supporting the seat around a rear wheel; A driving motor provided along the rotation center axis of the rear wheel; A battery pack installed in a lower portion of the seat to supply power to the driving motor; And a seat disposed at a rear portion of the handle and having an inclination such that the backrest is inclined toward the rear wheel. delete delete The method according to claim 1,
A front-wheel rolling safety bicycle equipped with a cover means for covering the upper part of the seat with snow and rain or sunlight. 5. The method of claim 4,
The shielding means may include: a winding drum installed at one end of the backrest of the seat; A shield which is wound or unwound around the winding drum; And a fixing unit for fixing one end of the visor to the vehicle body.

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