KR20120086463A - Power transmission apparatus of bicycle - Google Patents

Power transmission apparatus of bicycle Download PDF

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Publication number
KR20120086463A
KR20120086463A KR1020110007711A KR20110007711A KR20120086463A KR 20120086463 A KR20120086463 A KR 20120086463A KR 1020110007711 A KR1020110007711 A KR 1020110007711A KR 20110007711 A KR20110007711 A KR 20110007711A KR 20120086463 A KR20120086463 A KR 20120086463A
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KR
South Korea
Prior art keywords
bicycle
power transmission
diameter
drive gear
driven gear
Prior art date
Application number
KR1020110007711A
Other languages
Korean (ko)
Inventor
박민서
Original Assignee
박민서
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 박민서 filed Critical 박민서
Priority to KR1020110007711A priority Critical patent/KR20120086463A/en
Publication of KR20120086463A publication Critical patent/KR20120086463A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/02—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of unchangeable ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/02—Transmissions characterised by use of an endless chain, belt, or the like of unchangeable ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/08—Pedals

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a power transmission apparatus for a bicycle that enables a speed increase, an uphill driving, a long distance driving, and the like with a small force by rotating the front screw by the gear transmission method of the bicycle.
The power transmission device of the bicycle of the present invention for achieving this object,
A drive gear supported by the frame of the bicycle as a shaft and having a pair of pedals having a phase difference of 180 degrees on both sides of the shaft; A driven gear axially supported on the frame of the bicycle, meshing with the drive gear, the driven gear having a diameter less than 1/2 of the diameter of the drive gear; A power transmission shaft axially supported on the frame of the bicycle, meshing with the driven gear, the power transmission shaft having a diameter of 1/2 or less than the diameter of the driven gear; It is installed on the power transmission shaft is connected to the rear sprocket and the chain, the front sprocket formed larger than the diameter of the drive gear; consists of.

Description

Power transmission apparatus of bicycle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bicycles, and more particularly, to a power transmission device for a bicycle, which enables the most efficient transmission of power generated from a person to a wheel.

An example of an environmentally friendly means of transportation without pollution is a bicycle. The bicycle's power transmission means, ie, a structure that transmits power generated from a person to the rear wheel, a propulsion wheel, has a pair of pedals 180 degrees on an axis. It consists of a front sprocket installed with a phase difference and a rear sprocket installed on the shaft of the rear wheel and connected to the front sprocket and the chain.

Therefore, the front sprocket rotates by the rotational force applied to the pedal, and the power is transmitted to the rear sprocket through the chain to drive the rear wheel.

However, such a structure is very difficult to drive a long distance because it consumes a lot of power by changing the power generated from a person completely even when the driving conditions change, such as normal driving, increasing speed, and going uphill.

Accordingly, an object of the present invention is to provide a power transmission device for a bicycle which enables a speed increase, an uphill driving, a long distance driving, and the like with a small force by rotating the front screw by the gear transmission method of the bicycle.

The power transmission device of the bicycle of the present invention for achieving this object,

A drive gear supported by the frame of the bicycle as a shaft and having a pair of pedals having a phase difference of 180 degrees on both sides of the shaft;

A driven gear axially supported on the frame of the bicycle, meshing with the drive gear, the driven gear having a diameter less than 1/2 of the diameter of the drive gear;

A power transmission shaft axially supported on the frame of the bicycle, meshing with the driven gear, the power transmission shaft having a diameter of 1/2 or less than the diameter of the driven gear;

It is installed on the power transmission shaft is connected to the rear sprocket and the chain, the front sprocket formed larger than the diameter of the drive gear; consists of.

The present invention having the above configuration has the advantage that it does not take great force even in normal driving, speeding uphill, long distance driving by transmitting a large power and a large number of revolutions to the rear wheel with a small force.

Accordingly, the burden of using a bicycle is greatly reduced, so that anyone of all ages can easily use it, which is environmentally friendly as a pollution-free means of transportation, and has an effect of having a moderate exercise effect by continuous bicycle use.

1 is a view showing an example of a bicycle to which the present invention is applied.
Figure 2 is a view showing the structure of the power transmission device according to the present invention.
Figure 3 is a plan sectional view of a power transmission device according to a first embodiment of the present invention.
4 is a plan sectional view of a power transmission device according to a second embodiment of the present invention.
5 is a plan sectional view of a power transmission device according to a third embodiment of the present invention.
6 is a perspective view of a power transmission device according to a fourth embodiment of the present invention.
Fig. 7 is a plan sectional view of Fig. 6;
8 is a plan sectional view of a power transmission device according to a fifth embodiment of the present invention.

The present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a bicycle 100 according to the present invention, Figure 2 is a view showing the configuration of the power transmission device 200 of the present invention, Figure 3 is a view showing a flat cross-section, a power transmission device ( As shown in FIG. 2, the shaft 241 of the drive gear 240 is rotatably supported by the frame 210 of the bicycle, and the shaft 241 protrudes outward from both sides of the frame, and pedals 220 and 230 at the end thereof. ) Are mounted with a phase difference of 180 degrees.

At the rear of the drive gear 240, the driven gear 250 is supported by the shaft 251 to be rotatable to the frame 210, and is installed to engage with the drive gear 240.

In addition, the rear of the driven gear 250 is installed so that the power transmission shaft 260 is rotatably supported by the frame 210, the gear 261 is formed along the outer circumference of the power transmission shaft 260 to the It is installed to be engaged with the driven gear 250, and either side of the power transmission shaft 260 is extended to the outside of the frame 210, so that the central portion of the front sprocket 270 is fixed to the extended portion of the power transmission shaft 260 It rotates the same as the rotational speed of the transmission shaft 260.

The front sprocket 270 has a structure connected by the rear sprocket 300 and the chain 400 mounted to the rear wheel.

At this time, since the front sprocket 270 is located outside the frame 210, the front sprocket 270 does not interfere with the driven gear 250.

The diameter of the driven gear 250 has a diameter of 1/2 or less than the diameter of the drive gear 240, and the power transmission shaft 260 has a diameter of 1/2 or less than the driven gear 250. The front sprocket 270 is preferably formed larger than the diameter of the drive gear 240.

For example, the drive gear 240 has a diameter of about 10 ~ 12cm, driven gear 250 is about 4 ~ 6cm, power transmission shaft 260 is about 2 ~ 3cm, sprocket 270 is about 14 ~ It has a diameter of about 16cm, the power generated by the person driven by the pedals 220, 230 is driven gear 240-driven gear 250-power transmission shaft 260-and front sprocket 270-chain 400 It is delivered to the rear wheel via the rear sprocket (300).

This is because the speed is increased by the drive gear 240, the driven gear 250, and the power transmission shaft 260, and the rotational force is increased by the front sprocket 270 having a larger diameter than the drive gear 240, High speeds, uphill roads, and long distances are easily achieved at high speeds and large torques without the need for great force.

3 is a structure in which the drive gear 240, the driven gear 250, and the power transmission shaft 260 are sequentially installed from the front, but in the second embodiment of the present invention of FIG. 260, the driven gear 250, the drive gear 240 is shown a structure that is installed.

That is, the shaft of the power transmission shaft 260 is extended to the outside of the frame 210, the front sprocket 270 is installed, the rear of the power transmission shaft 260 is installed to engage the driven gear 250, It is a structure in which the drive gear 240 is installed to the rear of the driven gear 250.

The front sprocket 270 and the rear sprocket 300 are similarly connected by the chain 400, but the shafts 241 of the drive gear 240 in which the pedals 220 and 230 are installed between the upper and lower sides of the chain 400. Because of this position, the chain 400 and the pedals 220 and 230 do not interfere with each other.

FIG. 5 is a third embodiment of the present invention, in which power is distributed by two drive gears 240 and 242 and two driven gears 250 and 252 which are independent of each other.

To this end, the center portion of the frame 210 has an inner frame 211 separated from each other, so that the first drive gear 240 and the second drive gear 242 between the outer side and the inner frame 211 of the frame 210, respectively. ) Is independently rotatably supported.

That is, the shaft 241 of the first drive gear 240 is supported by the frame 210 and the inner frame 211, and the second drive gear 242 is installed side by side of the first drive gear 240. However, the shaft 243 is completely separated from the shaft 241 of the first drive gear 240 so as to be rotatably supported between the frame 210 and the inner frame 211.

In addition, the first driven gear 251 is engaged with the first drive gear 240 while being supported by the shaft 251 between the frame 210 and the inner frame 211 at the rear of the first drive gear 240. In addition, the second driven gear 252 is also installed in the rear of the second driving gear 242 while being engaged with the second driving gear 242 while being supported by the shaft 253 between the frame 210 and the inner frame 211. .

Of course, the shaft 251 and the second driven gear 252 of the first driven gear 250 is supported such that the shaft 253 is rotatable between the frame 210 and the inner frame 211 independently of each other.

The power transmission shaft 260 is supported by the frame 210, and a gear 261 is formed along the circumference thereof so that the first driven gear 250 and the second driven gear 252 are one power transmission shaft 260. Is engaged with the gear 261 of the

The power transmission shaft 260 extends to the outside of the frame 210, and the front sprocket 270 is mounted to transfer power to the rear sprocket 300 through the chain 400.

This structure is independent of each other by the first pedal 230 is mounted on the shaft 241 of the first drive gear 240 and the second pedal 220 is mounted on the shaft 243 of the second drive gear 242. It is a structure that increases the rotational force by dualizing the driving force by transmitting the driving force to the power transmission shaft 260.

On the other hand, when the interval between the inner frame 211 is formed larger than the thickness of the front sprocket 270, as in the fourth embodiment of the present invention of Figures 6 and 7, the front sprocket 270 of the frame 210 Instead of being installed on the outside, it may be immediately installed between the center portion of the power transmission shaft 260, that is, between the first driven gear 250 and the second driven gear 252.

Since the first driven gear 250 and the second driven gear 252 are independently supported from each other, the front sprocket 270 is installed between the first driven gear 250 and the second driven gear 252 to interfere with each other. This is a structure that does not occur.

FIG. 8 is a fifth embodiment of the present invention, in which the power transmission shaft 260, the first driven gear 250 and the second driven gear 252, the first drive gear 240 and the second drive in the opposite direction to FIG. Shows the structure in which the drive gear 242 is installed.

210: frame 211: inner frame
220,230: Pedal 240,242: Drive gear
250,252: driven gear 260: power transmission shaft
270: front sprocket 300: rear sprocket
400: chain

Claims (2)

A drive gear supported by the frame of the bicycle as a shaft and having a pair of pedals having a phase difference of 180 degrees on both sides of the shaft;
A driven gear axially supported on the frame of the bicycle, meshing with the drive gear, the driven gear having a diameter less than 1/2 of the diameter of the drive gear;
A power transmission shaft axially supported on the frame of the bicycle, meshing with the driven gear, the power transmission shaft having a diameter of 1/2 or less than the diameter of the driven gear;
And a front sprocket installed on the power transmission shaft and connected to a rear sprocket and a chain, the front sprocket having a diameter larger than that of the drive gear. A first drive gear supported by a shaft on a frame of the bicycle and having a first pedal mounted on the shaft;
A first driven gear axially supported on the frame of the bicycle, meshing with the first drive gear, the first driven gear having a diameter of 1/2 or less than the diameter of the first drive gear;
A second side mounted side by side of the first drive gear, supported independently by the axis of the frame of the bicycle independently of the first drive gear, and having a phase difference of 180 degrees with the first pedal on the shaft; Drive gear;
A second driven gear axially supported on the frame of the bicycle, meshing with the second drive gear, the second driven gear having a diameter of 1/2 or less than the diameter of the second drive gear;
A power transmission shaft axially supported by the frame of the bicycle, the first driven gear and the second driven gear meshed with each other, and having a diameter of 1/2 or less than the diameter of the first driven gear or the second driven gear;
And a front sprocket installed on the power transmission shaft and connected to the rear sprocket and the chain, the front sprocket having a diameter larger than the diameter of the first drive gear or the second drive gear.
KR1020110007711A 2011-01-26 2011-01-26 Power transmission apparatus of bicycle KR20120086463A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110007711A KR20120086463A (en) 2011-01-26 2011-01-26 Power transmission apparatus of bicycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110007711A KR20120086463A (en) 2011-01-26 2011-01-26 Power transmission apparatus of bicycle

Publications (1)

Publication Number Publication Date
KR20120086463A true KR20120086463A (en) 2012-08-03

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Application Number Title Priority Date Filing Date
KR1020110007711A KR20120086463A (en) 2011-01-26 2011-01-26 Power transmission apparatus of bicycle

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107512361A (en) * 2016-06-16 2017-12-26 天津市艾尔奇自行车股份有限公司 A kind of meshed transmission gear bicycle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107512361A (en) * 2016-06-16 2017-12-26 天津市艾尔奇自行车股份有限公司 A kind of meshed transmission gear bicycle

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E601 Decision to refuse application