WO2004028891A1

WO2004028891A1 - Device for bicycle operation

Info

Publication number: WO2004028891A1
Application number: PCT/KR2003/001953
Authority: WO
Inventors: Ji Hyun Ma
Original assignee: Ji Hyun Ma
Priority date: 2002-09-26
Filing date: 2003-09-25
Publication date: 2004-04-08
Also published as: AU2003267830A1; KR200298784Y1

Abstract

This invention increases effectiveness of power transmission since operation capability of crank gear assembly entity(10) is transmitted directly to the rear wheel(110) according to the operation axis(60). Meanwhile, bicycle operation is made effective. Due to its simple structure, this invention produces many effects such as prevention of malfunction and decreased function even during long term use. In the above mentioned, this invention was explained using specific ideal example, but this invention is not limited to the above mentioned actual example. Anyone with knowledge of the area that this invention belongs to can try diverse transformation without separating the purpose of this invention that is claimed for the scope of utility model registration claim.

Description

DEVICE FOR BICYCLE OPERATION

BACKGROUND OF THE INVENTION

Field of the Invention:

This invention relates to bicycle. In more detail, this invention relates to the

device for bicycle operation that comprises crank gear assembly entity by aligning bevel

gear of different diameter into the form of concentric circle. Moreover, this invention

enables effective operation of bicycle by preventing loss of human power during the

process of power transmission by transmitting operation capability of the above

mentioned crank gear assembly entity to the rear wheel based on the use of operation axis.

Furthermore, this invention is composed in a way that the bicycle malfunction is

prevented.

Description of the Prior Art:

In general, bicycle, used as sports equipment or transportation medium, rotates

crank gear by leveraging operation capability that is transmitted through pedal, and the

bicycle is operated by transmitting to the rear wheel through the chain of the above

mentioned crank gear's rotation capability.

At this moment, the above mentioned crank gear combines numerous sprockets

that each have different number of saw teeth. Accordingly, effective navigation is

enabled by enabling crank gear to change according to the state of road floor that includes

level of inclination (slope).

Figure 1 is the side view of the typically structure bicycle that operates/moves

rear wheel(230) by transmitting operation capability of crank gear(220) to the rear by using chain(210). Bicycle(300) that is based on the above mentioned operation method is

comprised of crank gear(220) where gears of different number of saw teeth are piled up

onto the space between frontal wheel(240) and rear wheel(230) that is conjoined to enable

rotation from the front and back part of the frame(250). The structure connects each

crank(212) that is attached with the pedal(211) at the vertical hem when it comes to the

both sides of the above mentioned crank gear(220)'s center part.

Along with this, recently, bicycle is made to increase the scope of conversion by

increasing the Gear Ratio that can be selected by piling up the sprocket that each has

different number of saw teeth when it comes to the follower gear(221) of rear wheel(230)

that is connected to the chain(210) .

Meanwhile, chain(210), connected to the crank gear(220) and follower gear(221)

of rear wheel(230), can countermeasure to the change in the distance between crank

gear(220) and follower gear(221) in an elastic manner, and power transmission for long

distance is made possible. On the other hand, effect decreases since the state in which

the lower part is relaxed needs to be maintained due to the characteristics of the chain

(210) during the process of power transmission. Accordingly, consumption of human

power increases and other problems rise.

Moreover, usage is inconvenient since chain(210) separates easily from the crank

gear(220) and follower gear(221) during its use. At the same time, problems such as

limited lifetime etc. result.

SUMMARY OF THE INVENTION

This invention relates to the device for bicycle operation. This invention is comprised of; crank gear assembly entity(lθ) where numerous bevel gears are conjoined

into concentricity; idler(20) that rotates operation axis(60) by being interlocked with the

above mentioned crank gear assembly entity(lθ); pressurizing supplementary

material(30) that recovers bevel gear of crank gear assembly entity(lθ); follower bevel

gear(50) that rotates with hub(lθl) in a single unit by being attached on the one side of

the hub(lθl) that is conjoined at the center part of the rear wheel (110); and conversion

lever(70) that interlocks with bevel gear of crank gear assembly entity(lθ) with idler (20)

in a selective manner.

Likewise, this invention enables effective power transmission, which prevents loss of

human power and ensures effective navigation of bicycle. Moreover, this invention may

prevent malfunction during long time use.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is the side view of typically structured bicycle.

Figure 2 is the plane view of this invention.

Figure 3 is the frontal view of this invention's principal part.

Figure 4 is the side view of the bicycle that applies this invention.

Figure 5 a and Figure 5b are plane view that depicts the reaction of this invention.

(Explanation of Symbols that Relate to the Key Parts of Figure >

1 : bevel gear 1 2 : bevel gear 2

3 : bevel gear 3 4 : bevel gear 4

5 : bevel gear 5 10 : crank gear assembly entity

11,12,13,14,15 : bevel gear 20 : idler 21 : plate spring 30 : pressurizing supplementary material

40 : housing 50 : follower bevel gear

60 : operation axis 61,62,63,64,65 : pressurizing ball

70 : conversion lever 90 : crank axis

110 : rear wheel

DETAILED DESCRIPTION

This invention was invented to solve the above mentioned problems. Technical

initiative of this invention is to make operation of bicycle effective, prevent malfunction

and to provide the medium for long-term use by transmitting operation capability of crank

gear assembly entity to the rear wheel by using operation axis, which in turn increases the

effect of power transmission.

Technical initiatives of this invention as mentioned above are realized by the

following composition of this invention;

crank gear assembly entity that is conjoined to enable movement of numerous bevel

gears that are aligned in concentricity into the axis direction by leveraging outer surface

of round circle of crank axis;

idler that rotates as single unit according to the contact with one of the bevel gears of

crank gear assembly entity by piling up the bevel gear that interlocking each with bevel

gear of the above mentioned crank gear assembly entity in a consecutive manner;

pressurizing supplementary material that aligns each plate spring that pressurizes the

above mentioned bevel gear 1, bevel gear 2, bevel gear 3, bevel gear 4 and bevel gear 5

that is projected outward into the axis direction by being attached closely to each of bevel gear 1, bevel gear 2, bevel gear 3, bevel gear 4 and bevel gear 5 of the above mentioned

crank gear assembly entity into circular form;

housing that provides necessary support to enable rotation of crank axis and idler by

being conjoined with the outside of the above mentioned crank gear assembly entity and

idler and pressurizing supplementary material;

follower bevel gear that rotates with hub as single unit by being attached at one side of

the hub that is conjoined at the center part of the rear wheel;

operation axis that transmits operation capability of crank gear assembly entity that is

transmitted through the idler into the follower bevel gear based on the use of bevel gear

that is formed at both sides of vertical hem by being conjoined between the above

mentioned idler and follower bevel gear; and

conversion lever that is each inserted into spiral shape from the both sides of outer surface

of round circle when it comes to the pressurizing ball that pressurizes both sides of each

bevel gear's rear part related to the crank gear assembly entity by being supported in a

way that each rotation is enabled at the both sides based on the use of housing.

Hereafter, device for bicycle operation according to this invention is explained in detail

by using attached figures.

Composition and Reaction of the Invention

Figure 2 is the plane view of this invention. Figure 3 is the frontal view of this

invention's principal part. Figure 4 is the side view of the bicycle that applies this

invention. Device for bicycle operation(lOO) in accordance to this invention is comprised

of; crank gear assembly entity(lθ) where numerous bevel gears of different diameter is lined up in the form of concentric circle, idler(20) that rotates along with the crank gear

assembly entity(lθ) by being interlocked with the above mentioned crank gear assembly

entity(lθ), pressurizing supplementary material(30) that returns each bevel gear of crank

gear assembly entity(lθ) to the initial location, housing(40) that is conjoined with the

outside of the pressurizing supplementary material(30), and the above mentioned crank

gear assembly entity(lθ) and idler(20), follower bevel gear(50) that is attached at the hub

of the rear wheel, and operation axis(60) and conversion lever(70) that is conjoined

between crank gear assembly entity(lθ) and follower bevel gear(50).

When it comes to the above mentioned crank gear assembly entity(lθ), bevel

gear 2(2) is conjoined with the outer surface of round circle of bevel gear 1(1) that rotates

based on the operation of crank axis(90). Bevel gear 3(3) is conjoined into outer surface

of round circle of the above mentioned bevel gear 2(2), and bevel gear 4(4) and bevel

gear 5(5) are conjoined into the outer surface of round circle of the above mentioned

bevel gear 3(3) in a consecutive manner.

At this time, each spline, S is formed when it comes to the outer surface of round

circle of each bevel gear. Each spline, S groove(H) is formed at inner surface of round

circle of bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear

5(5). When it comes to bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4)

and bevel gear 5(5), appearing and disappearing is possible towards the front from crank

axis(90), or nearby gear. Meanwhile, rotation takes place in single unit at the time of

rotation.

Along with this, the above mentioned crank gear assembly entity(lθ) is interlocked with idler(20) that is piles up the bevel gear(l 1,12,13,14,15) that is

interlocked each with bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4)

and bevel gear 5(5) in a consecutive manner. As such, rotation of idler(20) takes place

during the process of rotating crank gear assembly entity(lθ) based on the rotation

capability that is transmitted through crank axis(90).

At this moment, saw-toothed wheel that is in proportion with the diameter is formed at

the bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5).

Thus, number of saw teeth increases in a consecutive manner. Thus, different number of

rotation is assumed according to the location of each bevel gear's contact when it comes

to the idler(20) that is interlocked with the crank gear assembly entity(lθ).

In other words, an example is when the lowest number of rotation is assumed for

the 1 rotation of crank axis(90) at a state when the idler(20) is interlocked with bevel gear

1(1). On the other hand, the largest number of rotations is assumed at the state when the

bevel gear 5(5) is interlocked.

Along with this, idler(20) assumes lowest rotation capability at the state when

interlocked with bevel gear 5(5). On the other hand, rotation capability increases in a

consecutive manner during the process of interlocking with the bevel gear 4(4), bevel

gear 3(3), bevel gear 2(2) and bevel gear 1(1), which assumes largest rotation capability

during the process of interlocking with bevel gear 1(1).

Next, pressurizing supplementary material(30) that returns bevel gear 1(1), bevel

gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5) projected out towards the

axis direction to the original location comes into contact with each of the bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5), and is conjoined

with the pressurizing supplementary material(30) that pressurizes based on the elasticity

of plate spring(21) that lines the above mentioned bevel gear 1(1), bevel gear 2(2), bevel

gear 3(3), bevel gear 4(4) and bevel gear 5(5) into circular form.

At this moment, the above mentioned plate spring(21) of pressurizing

supplementary material(30) is placed in multiple to the left and right in a symmetry so

that both sides of bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and

bevel gear 5(5) can be pressured each to enable effective pressuring of each bevel gear. In

particular, contact part of the bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear

4(4) and bevel gear 5(5) is limited to main wheel lower part where gear is not formed.

As such, resistance to rotation and noise are minimized due to excessive friction with

bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5).

Next, crank gear assembly entity(lθ) and idler(20) are supported at the above

mentioned crank gear assembly entity(lθ) and idler(20) and outside of pressurizing

supplementary material(30). Space for the installation of pressurizing supplementary

material(30) is provided. At the same time, housing (40) where lubricant is stored

through the space at the lower part is conjoined. Conversion lever(70) is conjoined to the

horizontal towards one side.

The above mentioned conversion lever(70) pressures bevel gear 1(1), bevel gear

2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5) selectively along the rotation

angle to move to the axis direction. As such, it interlocks with one of the idler(20)'s bevel

gear(l 1,12,13,14,15). Meanwhile, rotation of idler(20) is enabled. Pressurizing ball(61,62,63,64,65) that pressures bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel

gear 4(4) and bevel gear 5(5) is each inserted in the shape of spiral.

At this moment, the above mentioned pressurizing ball(61,62,63,64,65) is

conjoined at the state of symmetry from both sides of outer surface of round circle. At the

center part of conversion lever(70), curve part(70A) is formed to prevent intervention

according to the contact with the crank axis(90) during the process of changing angle.

Along with this, numerous balls(66) are lined up in a consecutive manner to

enable rotation when it comes to the nearby part of each pressurizing ball(61,62,63, 64,65).

As such, friction based on the contact with bevel gear 1(1), bevel gear 2(2), bevel gear

3(3), bevel gear 4(4) and bevel gear 5(5) is prevented. Meanwhile, effective rotation of

bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5) is

enabled as result.

Next, the above mentioned hub(lθl) is operated to the one side of hub(lθl) that

is conjoined to the central part of rear wheel, and follower bevel gear(50) of bevel gear

form is attached to enable rotation of rear wheel. One side of operation axis(60)'s vertical

hem is connected to the above mentioned follower bevel gear(50).

The above mentioned operation axis(60) is conjoined between follower bevel

gear(50) and idler(20) to transmit operation capability of crank gear assembly entity(lθ)

that is transmitted through idler(20) to the follower bevel gear(50) to rotate rear wheel.

Bevel gear(51,52) that interlocks with idler(20) and follower bevel gear(50) is formed at

both sides.

Meanwhile, this actual example comprises bevel gear of crank gear assembly entity(lθ) into bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel

gear 5(5). Idler(20) that comes into direct contact with the above mentioned bevel gear

1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5) is comprised of

five bevel gears(l 1,12,13,14,15). Along with this, conjoining of five pressurizing

balls(61,62,63,64,65) onto outer surface of round circle of conversion lever(70) was

presented as an example, but this invention is not limited to the above mentioned.

According to the type of bicycle that is applied, quantity of each bevel gear and

pressurizing ball is added or subtracted to compose with an operation device that offers

three or eight tiered conversion gear.

Among the figures, non explained symbol B is the bearing, and symbol 70 A is a

marking symbol that is formed on the surface of conversion lever(70) to enable

discernment of gear's tier that is interlocked.

Reaction and effect of this invention, comprised as mentioned above, is explained

in the following.

Device for bicycle operation(lOO) in accordance to this invention is installed at

the lower part of the frame(130) that is situated between the frontal wheel(l 10) and rear

wheel(120), and crank axis(90) is rotated based on the human power that is transmitted

through pedal and crank. Navigation is enabled as the rotation capability of the above

mentioned crank axis(90) is transmitted to the rear wheel(l 10).

This type of invention advances bevel gear of crank gear assembly entity(l 0) 3(3)

towards the axis direction when at the navigation state, and navigation at the state when

the number of rotation and rotation capability is maintained at the interim stage is enabled by interlocking bevel gear(13) of middle location among idler(20)'s bevel

gear(l 1,12,13,14,15) when it comes to the above mentioned bevel gear 3(3).

During this process, to ensure navigation on the floor of the road with steep

inclination (slope), rotation to the first level conversion is conducted against conversion

lever (70) as shown on Figure 5 a if and when considerable rotation capability is needed.

Accordingly, pressurizing ball(61) among the pressurizing balls(61,62,63, 64,65)

conjoined to the outer surface of round circle that is nearby center part of conversion

lever(70) is rotated to the horizontal state rotation. Meanwhile, the above mentioned

pressurizing ball(61) needs to projected outwards to the frontal part.

As mentioned above, if and when pressurizing ball(61) near the central part is

situated horizontally, bevel gear 1(1) that is directly connected to the crank axis(90)

among the bevel gear of crank gear assembly entity(lθ) 1(1), bevel gear 2(2), bevel gear

3(3), bevel gear 4(4) and bevel gear 5(5) is pressured towards the frontal part.

Accordingly, bevel gear 1(1) is interlocked with the bevel gear(l 1) situated at the

vertical hem of idler(20), and rotates operation axis(60) at a low speed based on powerful

rotation capability. When it comes to the above mentioned operation axis(60), follower

bevel gear(50) attached onto the hub(lθl) based on the bevel gear(52) formed at the other

gear tier is rotated. As such, operation of rear wheel(l 10) takes place.

During this process, if and when navigation is desired in high speed by

navigating on smooth road floor, conversion lever(70) is rotated consecutively into the

same direction as the process above mentioned to convert into applicable gear tier. An

example is that the pressurizing ball(61) situated at the vertical hem among pressurizing balls(61,62,63 ,64,65) that is conjoined onto the above mentioned outer surface of round

circle of conversion lever(70) assumes a state in which projection to the frontal part takes

place by maintaining horizontal state if and when the conversion lever(70) is rotated to

the 5 tier conversion location.

Next as mentioned above, when the pressurizing ball(61) of both directions is

situated to the horizontal, the bevel gear 5(5) that has largest number of saw teeth among

bevel gear of crank gear assembly entity(lθ) 1(1), bevel gear 2(2), bevel gear 3(3), bevel

gear 4(4) and bevel gear 5(5) is pressured starting from the rear to move to the front part.

Accordingly, the above mentioned bevel gear 5(5) is closely attached to the bear gear(15)

of the idler(20).

Meanwhile, bevel gear 1(1), bevel gear 2(2), bevel gear 3(3) and bevel gear 4(4)

that is not transmitted with pressurizing power from the rear during this process maintains

a state of separation with idler(20) when it comes to bevel gear 1(1), bevel gear 2(2),

bevel gear 3(3) and bevel gear 4(4) except for bevel gear 5(5) due to the fact that

projection towards the front does not take place due to the elasticity of plate spring(21)

attached onto pressurizing supplementary material(30).

Accordingly, bevel gear 5(5) is interlocked with bevel gear(15) situated at the

foremost outer part of idler(20), and rotates operation axis(60) at a high speed through the

bevel gear(51) of vertical hem. The above mentioned operation axis(60) rotates follower

bevel gear(50) attached onto hub(lθl) with increased speed by leveraging bevel gear(52)

that is formed at the other gear tier. As such, operation of rear wheel(l 10) takes place.

Next, if and when return to the typical state is desired according to the completion of the above mentioned process, conversion lever(70) is converted to

applicable gear tier as in the case of the above mentioned process. Accordingly,

selective gear conversion of bicycle(200) according to the road floor or navigation speed

is enabled. This type of invention is transmitted with power through operation axis(60).

As such, power transmission is realized effectively on the navigation process of

bicycle(200). Along with this, power transmission system is simple, which prevents

malfunction even when used for a long time

Claims

CLAIMSWHAT IS CLAIMED IS:

1. Device for bicycle operation characterized by the following composition; crank

gear assembly entity (10) that is conjoined to enable movement of numerous bevel gears

that are aligned in concentricity into the axis direction by leveraging outer surface of

round circle of crank axis (90);

idler (20) that rotates as single unit according to the contact with one of the bevel gears

of crank gear assembly entity by piling up the bevel gear that interlocking each with bevel

gear of the above mentioned crank gear assembly entity (10) in a consecutive manner;

pressurizing supplementary material (30) that aligns each plate spring(21) that

pressurizes the above mentioned bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel

gear 4(4) and bevel gear 5(5) that is projected outward into the axis direction by being

attached closely to each of bevel gear 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear

4(4) and bevel gear 5(5) of the above mentioned crank gear assembly entity (10) into

circular form;

housing (40) that provides necessary support to enable rotation of crank axis (90) and

idler (20) by being conjoined with the outside of the above mentioned crank gear

assembly entity (10) and idler (20) and pressurizing supplementary material (30);

follower bevel gear (50) that rotates with hub (101) as single unit by being attached at

one side of the hub (101) that is conjoined at the center part of the rear wheel (110);

operation axis (60) that transmits operation capability of crank gear assembly entity (10)

that is transmitted through the idler (20) into the follower bevel gear (50) based on the use of bevel gear that is formed at both sides of vertical hem by being conjoined between the

above mentioned idler (20) and follower bevel gear (50); and

conversion lever (70) that is each inserted into spiral shape from the both sides of outer

surface of round circle when it comes to the pressurizing ball that pressurizes both sides

of each bevel gear's rear part related to the crank gear assembly entity (10) by being

supported in a way that each rotation is enabled at the both sides based on the use of

housing (10).

2. When it comes to Claim 1, device for bicycle operation that is characterized by

the bevel gear of crank gear assembly entity(lθ) that is characterized by; bevel gear 2(2)

that is conjoined into axis direction to enable movement into axis direction on the outer

surface of round circle of bevel gear 1(1) that rotates according to the above mentioned

operation of crank axis(90) by being conjoined with the outer surface of round circle of

crank axis(90), and that is conjoined to rotate with bevel gear 1(1) in a single unit by

having bevel gear 3(3) and bevel gear 4(4) and bevel gear 5(5) conjoined in a consecutive

manner when it comes to the outer surface of round circle of the above mentioned bevel

gear 2(2).

3. When it comes to Claim 1, device for bicycle operation that is characterized by

the idler(20) that is characterized by; each bevel gear(ll, 12,13, 14,15) that is interlocked

with each bevel gear of crank gear assembly entity(lθ) 1(1), bevel gear 2(2), bevel gear

3(3), bevel gear 4(4) and bevel gear 5(5) in a consecutive manner.

4. When it comes to Claim 1, device for bicycle operation that is characterized by

the above mentioned conversion lever(70) that is characterized by; conjoining of each of pressurizing ball(61,62,63 ,64,65) that pressures both sides of bevel gear of crank gear

assembly entity(lθ) 1(1), bevel gear 2(2), bevel gear 3(3), bevel gear 4(4) and bevel gear

5(5)'s rear.

5. When it comes to Claim 1 and 4, device for bicycle operation that is

characterized by the above mentioned conversion lever(70) that is characterized by;

insertion of ball(66) that supports to enable rotation of bevel gear 1(1), bevel gear 2(2),

bevel gear 3(3), bevel gear 4(4) and bevel gear 5(5) at the near part of the pressurizing

ball(61, 62,63,64,65).