KR20120080371A - Automatic continuously variable transmission of bicycle - Google Patents

Abstract

The present invention relates to an automatic continuously variable transmission of a bicycle.
The automatic continuously variable transmission of the bicycle according to the present invention is rotatably assembled to the boss 18 of the bicycle 10, and the first and second pedal cranks 26 and 28 are assembled to both sides, and the first gear is arranged on one side of the outer diameter. The shaft 102 on which the 104 is disposed is fastened to the boss 18, and the reverse rotation of the outer ring 112 is prevented from the inner ring 114, and the second gear 113 is disposed at the outer diameter of the outer ring 112. ) Is formed in the one-way unit 110, the shaft 102 is rotatably disposed in the idle state, the third gear 122 is installed to engage with the first gear 104 on one side and the third gear ( The fourth gear 124 is disposed to engage the 122, and one side of the fourth gear 124 is provided with a fifth gear 126 that is integral with the fourth gear 124 and meshes with the second gear 113. The sixth machine is rotatably disposed on the carrier unit 120 and the shaft 102 to be in an idle state, and is engaged with the fifth gear 126 in one side of the cylinder body 142 in an internal engagement. 144 is formed and the drive wheel unit (7) is formed on the outer diameter side of the cylinder body 142, the seventh gear 146 is connected to the electric unit 24 for transmitting power to the rear wheel 16 of the bicycle 10 ( The control unit 130 installed on one side of the carrier 140 and the carrier unit 120 controls the rotation of the carrier unit 120 in the drive wheel unit 140 in proportion to the driving resistance force applied to the drive wheel unit 140. Include.

Description

Automatic continuously variable transmission of bicycle

The present invention relates to an automatic continuously variable transmission of a bicycle, and more particularly, to an automatic continuously variable transmission of a speed ratio of the input side and the output side of the bicycle according to the load applied to the driving of the bicycle.

In general, the bicycle is illuminated by the pedal to obtain the power required for driving, the power is driven by the wheels by a plurality of chain sprocket and chain to drive the bicycle.

The plurality of chain sprockets described above have different pitch circle sizes, and the speed ratio of the shift is determined by the combination of chain sprockets having different pitch circle sizes.

On the other hand, when starting from a standstill or climbing a hill, the resistance to the bicycle driving is greatly acted. At this time, the speed ratio can be set to a low speed, and the speed is low, but the pedaling force is reduced.

On the contrary, as described above, if the speed ratio is set high when the resistance is largely effected on the driving of the bicycle, much physical consumption is required for the pedaling.

On the other hand, when driving over a certain speed or going downhill, the driving resistance of the bicycle is small, and at this time, the speed ratio can be set to a high driving speed, the speed is high, and the pedaling force is not excessive.

On the contrary, as described above, if the speed ratio is set low when the resistance acts on the bicycle, it is not difficult when the pedal is pressed, but the number of revolutions of the pedal being rolled by the pedal is increased.

In other words, when driving a bicycle, it is necessary to select an appropriate speed ratio according to the driving resistance so that the user can drive at an appropriate speed without applying excessive force.

Conventionally, a bicycle is provided with a transmission, and a proper speed ratio is operated by operating the above-described transmission, but a user who is not used to handling a mechanical device has a problem in that the transmission is not properly operated.

Accordingly, an object of the present invention is to provide an automatic continuously variable transmission of a bicycle such that the continuously variable transmission is performed according to the bicycle running resistance without artificial manipulation.

The present invention has been made in view of the above problems, and it is an object of the present invention to at least partially solve the problems in the conventional arts. There will be.

The automatic continuously variable transmission of the bicycle according to the present invention for achieving the above technical problem is rotatably assembled to the boss 18 of the bicycle 10 and the first and second pedal cranks 26 and 28 are assembled to both sides. And a shaft 102 in which the first gear 104 is disposed at one side of the outer diameter; The one-way unit 110 fastened to the boss 18 and prevented from reverse rotation of the outer ring 112 in the inner ring 114 and the second gear 113 is formed in the outer diameter of the outer ring 112. ; It is disposed rotatably in the idle state on the shaft 102, the third gear 122 is installed to engage with the first gear 104 on one side and the fourth to engage the third gear 122 on the other side Gear unit 124 is disposed, one side of the fourth gear 124 is a carrier unit which is provided with a fifth gear 126 integral with the fourth gear 124 and engaged with the second gear 113 ( 120); The sixth gear 144 is rotatably disposed on the shaft 102, and the sixth gear 144 is formed on one side of the cylinder body 142 so as to be internally engaged with the fifth gear 126. A drive wheel unit 140 having a seventh gear 146 connected to an electric unit 24 for driving power toward the rear wheel 16 of the bicycle 10 at an outer diameter side; And a control unit 130 installed at one side of the carrier unit 120 to control the rotation of the carrier unit 120 in the drive wheel unit 140 in proportion to the driving resistance force applied to the drive wheel unit 140. );

In addition, the control unit 130, the body 132 formed on one side of the carrier unit 120; An arm unit 138 installed on the body 132 and having an elastic force; And is installed at an end of the arm unit 138 to be in close contact with the inner diameter surface of the cylinder body 142 with the elastic force, and when the running resistance is large in proportion to the running resistance applied to the driving wheel unit 140. When the running resistance is small, the rolling wheel 139, which is rolled or stopped relatively less, may include.

In addition, it is installed on the body 132 to be movable in the radial direction of the drive wheel unit 140 and fixed to one side of the arm unit 138 to adjust the elastic tension acting on the arm unit 138 A slider 134 to make it available; And first and second nuts 136a and 136b disposed on one side of the slider 134 to fix the flow position of the slider 134 to the body 132.

In addition, irregularities are formed on an outer diameter surface of the rolling wheel 139 or an inner diameter surface of the cylinder body 142 to improve the friction between the rolling wheel 139 and the cylinder body 142 to control the 130. It may be to prevent the functional degradation of.

Specific details of other embodiments are included in the detailed description and the drawings.

Since the speed ratio of the automatic continuously variable transmission of the present invention made as described above changes in proportion to the magnitude of the driving resistance, even a user who is inexperienced in the operation of the transmission automatically has an appropriate speed ratio corresponding to the running resistance of the bicycle without operating the transmission. The shift allows you to drive at a moderate speed without consuming excessive stamina.

1 and 2 are views for explaining a bicycle equipped with an automatic continuously variable transmission of a bicycle according to an embodiment of the present invention.
3 and 4 are an exploded perspective view and a perspective view of the assembled state for explaining the configuration of the automatic continuously variable transmission of the bicycle according to an embodiment of the present invention.
5 is a cross-sectional view of an assembled state of an automatic continuously variable transmission of a bicycle according to an embodiment of the present invention.
6 is a view for explaining the operation when the driving resistance largely acts on the automatic continuously variable transmission of the bicycle according to an embodiment of the present invention.
7 is a view for explaining the operation when the driving resistance is small in the automatic continuously variable transmission of the bicycle according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

Like reference numerals refer to like elements throughout the specification.

Hereinafter, an automatic continuously variable transmission of a bicycle according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 and 2.

1 and 2 are views for explaining a bicycle provided with an automatic continuously variable transmission of a bicycle according to an embodiment of the present invention.

As shown in FIG. 1, the bicycle 10 includes a front wheel 14 at the front of the body frame 12, a rear wheel 16 at the rear, and a boss 18 at the lower side of the body frame 12. Is formed.

In addition, the boss 18 described above is provided with a drive unit 20, and the power generated by the drive unit 20 is transmitted to the rear wheel 16 described above by the electric unit 24.

The above-described transmission unit 24 may be a chain, a timing belt, or the like, and the above-described driving unit 20 may be a chain sprocket or a timing gear according to the type of the transmission unit 24 described above.

In the above-described driving unit 20, the shaft 102 is fastened to the boss 18, and first and second pedal cranks 26 and 28 are provided at both ends of the shaft 102.

Automatic continuously variable transmission 100 according to an embodiment of the present invention is provided in the above-described driving unit 20 as shown in FIG.

The configuration of the automatic continuously variable transmission 100 will be described in more detail with reference to FIGS. 3 to 5.

3 and 4 are exploded perspective and exploded perspective views for explaining the configuration of the automatic continuously variable transmission of the bicycle according to an embodiment of the present invention, Figure 5 is a perspective view of the bicycle according to an embodiment of the present invention This is a sectional view of the assembled state of the automatic continuously variable transmission.

The first gear 104 is disposed on one side of the outer diameter of the shaft 102 described above.

In addition, the one-way unit 110 is installed at the outer diameter of the boss 18, and the carrier unit 120 and the driving wheel unit 140 are rotatably installed at the outer diameter of the shaft 102. One of the carrier units 120 is provided with a control unit 130 to control the flow of the carrier unit 120.

The one-way unit 110 described above is configured such that the outer ring 112 is rotated in one direction and not rotated in the reverse direction on the outer side of the inner ring 114.

In addition, the second gear 113 is formed at the outer diameter of the outer ring 112 described above.

Meanwhile, the internal thread 115 may be formed at the inner diameter of the inner ring 114 described above, and the external thread 19 may be formed at the outer diameter of the boss 18 described above. The female screw 115 may be fastened so that the one-way unit 110 described above may be installed at the boss 18.

On the other hand, the inner ring 114 of the wenway unit 110 described above may be welded to the boss 18 described above or fixed by a key.

The carrier unit 120 described above may be rotatably disposed on the shaft 102 described above by the first bearing 121.

In addition, the above-described carrier unit 120 may be rotatably provided on one side with the third gear 122 in an idle state, and the above-described third gear 122 meshes with the above-described first gear 104. .

In addition, a fourth gear 124 may be rotatably provided in an idle state on the other side of the carrier unit 120 described above, and the fourth gear 124 described above may be engaged with the third gear 122 described above. All.

In addition, a fifth gear 126 that is integrally rotated with the fourth gear 124 described above is disposed on one side of the fourth gear 124 described above.

The driving wheel unit 140 described above may be rotatably disposed in the idle state by the second bearing 141 on the shaft 102.

In addition, the above-described driving wheel unit 140, the cylinder body 142 is formed on one side, the sixth gear 144 is formed on the inner diameter side of the cylinder body 142, the sixth gear 144 described above Meshes with the fifth gear 126 described above.

In addition, in the driving wheel unit 140 described above, a seventh gear 146 is formed at the outer diameter of the cylinder body 142 described above, and the seventh gear 146 described above is chained according to the type of the transmission unit 24. It may be provided as a sprocket or a timing gear, and the above-described transmission unit 24 is connected to the seventh gear 146 to transmit the power of the driving wheel unit 140 to the rear wheel 16. .

The above-mentioned control unit 130 is installed on one side of the above-mentioned carrier unit 120 and is proportional to the driving resistance force applied to the above-mentioned driving wheel unit 140, and the above-mentioned carrier unit (not shown) in the above-mentioned driving wheel unit 140 ( 120) to control the rotation.

The control unit 130 described above is described in more detail as follows.

A body 132 is formed on one side of the carrier unit 120 described above, an arm unit 138 having an elastic force is installed on the body 132, and a rolling wheel () is formed at an end of the arm unit 138. 139) is installed.

In particular, the above-described rolling wheel 139 is in close contact with the elastic force of the arm unit 138 described above to the inner diameter surface of the cylinder body 142 described above in proportion to the running resistance acting on the above-described driving wheel unit 140. If the driving resistance is large, the rolling resistance is small. If the driving resistance is small, the rolling resistance is relatively low.

In addition, the slider 134 may be further installed on the above-described body 132, and the above-described arm unit 138 may be installed on the above-described slider 134.

In addition, the slider 134 described above may be installed in the above-described body 132 such that the slider 134 may flow in the radial direction of the driving wheel unit 140, and the closer the slider 134 is to the cylinder body 142, the more detailed. The elastic force acting on the arm unit 138 increases, and the elastic force acting on the arm unit 138 described above decreases as the slider 134 moves away from the cylinder body 142. The elastic tension acting on) is controlled.

In addition, the above-described slider 134 may be fixed to the position moved in the above-described body 132, and as an example, the external thread of the slider 134 to form a male screw, the above-described external thread on both sides of the body 132 The first and second nuts 136a and 136b may be fastened to the body 132 to fix the position of the slider 134 described above.

On the other hand, a friction unit for improving the friction force may be further provided at a portion where the rolling wheel 139 and the cylinder body 142 described above abut.

The friction unit described above may have irregularities formed on both sides or one side of the rolling wheel 139 or the cylinder body 142, thereby increasing resistance to the carrier unit 120 flowing from the driving wheel unit 140. Can be.

In addition, the friction unit described above may be provided with a material having high frictional force, such as leather, artificial leather, rubber, etc. in the outer diameter of the rolling wheel 139.

That is, a lubricant may be provided at a portion where friction of the mechanical component occurs. Although the function of the control unit 130 may be deteriorated by such lubricant, the control unit 130 may be further provided by further providing the friction unit. ) Function can be prevented from deteriorating.

Hereinafter, the operation of the automatic continuously variable transmission 100 according to an embodiment of the present invention will be described with reference to FIGS. 6 and 7.

Accompanying drawings, Figure 6 is a view for explaining the action when the driving resistance largely acts on the automatic continuously variable transmission of a bicycle according to an embodiment of the present invention, Figure 7 is an automatic continuously variable transmission of a bicycle according to an embodiment of the present invention Is a diagram for explaining the action when the running resistance is small.

The pedal of the bicycle 10 is depressed by the occupant, whereby the first and second pedal cranks 26 and 28 rotate the shaft 102.

If the bicycle driving is a general situation, the power input to the shaft 102 rotates the drive wheel unit 140 in the bicycle driving direction and causes the rear wheel 16 to be rolled by the electric unit 24 so that the bicycle 10 travels. Will be.

At this time, the driving resistance to interfere with the running of the bicycle 10 is acting, when starting from a stationary state, or when going up a hill road, the running resistance may be large.

On the contrary, when the bicycle 10 is already driving or going downhill, the driving resistance may be small.

That is, the driving resistance changes according to the driving situation of the bicycle 10, and because the individual difference of the occupant is larger, it is meaningless to present the larger and smaller values for the driving resistance more and more. In the detailed description of the present invention, the driving resistance is large or small.

First, the case where the running resistance is large will be described.

When the driving resistance is large, it means that the driving force is applied in a direction that the driving wheel unit 140 does not rotate when the pedal of the bicycle is pressed.

When the rider pedals, the shaft 102 rotates, the shaft 102 meshes with the first gear 104 and the third gear 122, and the third gear 122 meshes with the fourth gear 124. The fourth gear 124 is integral with the fifth gear 126, and the fifth gear 126 is engaged with the one-way unit 110 and the driving wheel unit 140, and the one-way unit 110 described above. The reverse rotation is prevented so that the carrier unit 120 revolves around the shaft 102.

On the other hand, when the above-mentioned carrier unit 120 revolves, the speed and force of revolving in proportion to the elastic pressure set in the control unit 130 are variable.

That is, when the running resistance is greater than the elastic pressure set in the control unit 130, the above-described carrier unit 120 moves in proportion to the running resistance.

On the other hand, in the control unit 130 described above, the rolling wheel 139 is the cylinder body 142 of the drive wheel unit 140 when the above-mentioned carrier unit 120 revolves inside the above-described drive wheel unit 140. Since the rolling wheel 139 is rolling, the force to rotate the driving wheel unit 140 is still applied.

In addition, since the fifth gear 126 and the sixth gear 144 are engaged, the force to rotate the driving wheel unit 140 in the direction in which the carrier unit 120 rotates while the above-described carrier unit 120 is idle. This acts and the driving wheel unit 140 is rotated by this force.

In addition, the fourth gear 124 is revolved around the outer periphery of the first gear 104, when the fourth gear 124 has the same pitch gear configuration in the same module when the shaft 102 rotates once The four gears 124 rotate twice.

If the above-mentioned fourth gear 124 is rotated twice, the speed and the amount of rotation are doubled if the force is the same, and if the speed and the amount of rotation are the same, the force to be applied by the occupant is halved. The health consumption of the will be reduced.

In other words, when the driving resistance of the bicycle is largely applied, the occupant can run the bicycle without excessive physical consumption.

The case where the running resistance is small will be described below.

When the rider pedals, the shaft 102 rotates, the shaft 102 meshes with the first gear 104 and the third gear 122, and the third gear 122 meshes with the fourth gear 124. The fourth gear 124 is integral with the fifth gear 126, and the fifth gear 126 is engaged with the one-way unit 110 and the driving wheel unit 140, and the one-way unit 110 described above. ) Is a condition that can be rotated forward.

On the other hand, since the running resistance will be smaller than the elastic pressure set in the control unit 130, the carrier unit 120 revolves around the shaft 102, but at this time, the carrier unit 120 is driven by the control unit 130. Since the state in close contact with the unit 140 is maintained, the relative speed of the carrier unit 120 with respect to the drive wheel unit 140 becomes zero or a low speed, so that the carrier unit 120 and the drive wheel unit 140 have a similar rotation. It will rotate at angular speed.

In addition, when the above-mentioned carrier unit 120 revolves about the shaft 102, the driving resistance of the bicycle may always change, and thus, when the driving resistance increases, the carrier unit 120 and the driving wheel unit 140 may deal with each other. Rotational angular velocity can be varied.

On the other hand, if the modules of all gears are the same and the pitch source of the 1st gear 104 and the 4th gear 124 is the same, when the above-mentioned shaft 102 rotates 1 time, the 4th gear 124 mentioned above will be It rotates twice while revolving once about the shaft 102.

The fifth gear 126, which is provided integrally with the fourth gear 124 while the fourth gear 124 is rotated twice, meshes with the sixth gear 144, so the sixth gear 144 is a driving wheel unit. Rotate 140.

In particular, when the pedal is pressed with the same force, the number of revolutions of the fifth gear 126 is increased compared to the number of revolutions of the shaft 102, so that the bicycle is increased.

On the other hand, when the running resistance is changed, the carrier unit 120 changes the relative movement direction and the amount of movement with the drive wheel unit 140 in proportion to the elastic tension and the running resistance of the control unit 130, thereby pressing the pedal. Even if the force is the same, the increase and decrease of the rotational speed and torque transmitted to the driving wheel unit 140 corresponding to the driving resistance is increased or decreased.

That is, as described above, the speed ratio is automatically shifted automatically according to the driving resistance when the bicycle is driven. Thus, even if the machine operation is not skillful, the driving speed is appropriately responded to the driving resistance without operating the transmission, without driving the transmission. You can do it.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

The automatic continuously variable transmission according to the present invention may be installed in the bicycle to actively change the speed in response to the running resistance of the bicycle to be used to reduce the stamina consumption and to run at an appropriate speed.

10: bicycle 12: body frame
14: front wheel 16: rear wheel
18: Boss 19: first fastening portion
20: drive part 22: driven part
24: electric unit 26, 28: first and second pedal crank
100: automatic CVT
102: shaft 104: first gear
110: one-way unit 112: outer ring
113: second gear 114: inner ring
115: second fastening portion 120: carrier unit
121: first bearing 122: third gear
124: fourth gear 126: fifth gear
130: control unit 132: mounting body
134: sliders 136a, 136b: first and second nuts
138: arm unit 139: rolling wheel
140: drive wheel unit 141: second bearing
142: inner diameter 144: sixth gear
146: seventh gear

Claims (4)

A shaft (102) rotatably assembled to the boss (18) of the bicycle (10) and having first and second pedal cranks (26) and (28) assembled on both sides thereof and having a first gear (104) disposed on an outer diameter side thereof;
The one-way unit 110 fastened to the boss 18 and prevented from reverse rotation of the outer ring 112 in the inner ring 114 and the second gear 113 is formed in the outer diameter of the outer ring 112. ;
It is disposed rotatably in the idle state on the shaft 102, the third gear 122 is installed to engage with the first gear 104 on one side and the fourth to engage the third gear 122 on the other side Gear unit 124 is disposed, one side of the fourth gear 124 is a carrier unit which is provided with a fifth gear 126 integral with the fourth gear 124 and engaged with the second gear 113 ( 120);
The sixth gear 144 is rotatably disposed on the shaft 102, and the sixth gear 144 is formed on one side of the cylinder body 142 so as to be internally engaged with the fifth gear 126. A drive wheel unit 140 having a seventh gear 146 connected to an electric unit 24 for driving power toward the rear wheel 16 of the bicycle 10 at an outer diameter side; And
The control unit 130 installed on one side of the carrier unit 120 to control the rotation of the carrier unit 120 in the drive wheel unit 140 in proportion to the driving resistance force applied to the drive wheel unit 140. Automatic continuously variable transmission of the bike, including;
The method of claim 1,
The control unit 130
A body 132 formed on one side of the carrier unit 120;
An arm unit 138 installed on the body 132 and having an elastic force; And
It is installed at the end of the arm unit 138 is in close contact with the inner diameter surface of the cylinder body 142 by the elastic force and in proportion to the running resistance applied to the driving wheel unit 140, the running resistance is rolled up and the running If the resistance is small, the rolling wheel 139 is rolled or stopped relatively less;
Automatic continuously variable transmission of bicycles.
The method of claim 2,
It is installed on the body 132 to be able to flow in the radial direction of the drive wheel unit 140 and fixed to one side of the arm unit 138 to adjust the elastic tension acting on the arm unit 138 Slider 134; And
First and second nuts 136a and 136b disposed on one side of the slider 134 to fix the flow position of the slider 134 to the body 132;
Automatic continuously variable transmission of the bicycle including more.
The method of claim 2,
Unevenness is formed on the outer diameter surface of the rolling wheel 139 or the inner diameter surface of the cylinder body 142 to improve the friction force between the rolling wheel 139 and the cylinder body 142 to function as the control unit 130. Automatic continuously variable transmission on bicycles to prevent degradation.

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