KR20150052754A

KR20150052754A - automatic change gear structure of a bicycle

Info

Publication number: KR20150052754A
Application number: KR1020140059069A
Authority: KR
Inventors: 박민철
Original assignee: 박민철
Priority date: 2013-11-06
Filing date: 2014-05-14
Publication date: 2015-05-14

Abstract

While a bicycle is being used as a regular means of transportation, the bicycle is ridden at low speeds by changing the gears when the bicycle rises along an upward slope after riding on flat land. Moreover, while a regular bicycle is ridden while changing gears in accordance to the conditions of a road, as this is often the case; the gears can be changed by changing a position of a lever placed on a certain position of a bicycle handlebar. According to the present invention, to realize an automatic gearshift without changing the position of the lever, the automatic gearbox structure of a bicycle has an automatic gearshift structure such that flexibility is maintained by controlling change in torque, which changes at any time with a small force while automatically changing the gears on an upward slope, wherein a greater strength is required than a rider′s appropriate strength from the legs as a tension sprocket is placed on the upper surface of a chain at a position higher than the horizontal plane of the chain in a regular chain wherein the upper surface of the chain, which drives the multistage sprocket at the shaft of a rear wheel by a power means of the driving sprocket usually shaft-mounted on a crankshaft kept horizontal.

Description

[0001] The present invention relates to a bicycle automatic transmission structure,

The present invention relates to a structure in which a shift of a multi-stage sprocket is automatically performed without manual operation when the driver is driving while the usual bicycle is in operation

Bicycles have been used as a means of transportation for a long time, but nowadays, the use of bicycles is more convenient and faster than the use of bicycles.

In the bicycle class, beginners or most women can be upset when they have to adjust the speed of the bike according to the ups and downs of the road.

In order to reduce the objection of the bicycle and to use the bicycle more conveniently as a means of transportation, the multistage sprocket is automatically shifted by automatically moving the chain that drives the sprocket.

In the structure of the acceleration of a normal bicycle, the driving sprocket that is installed in the pedal and the crankshaft is composed of two or three stages, and the multistage sprocket that is axially installed together with the rear wheel shaft that is rotated by the power is composed of seven stages, And the multi-stage sprocket is shifted by manual operation. Therefore, the structure for realizing the automatic shifting can be found because the driver may inconvenience the shift manually

The present invention relates to a chain for driving multistage sprockets provided on a rear wheel axis of a bicycle, comprising a tension sprocket positioned higher than a horizontal plane of the chain, the torque generated by the crankshaft of the bicycle being raised, There is a change in position with pressure;

If gear shifting is performed in accordance with a change in the position of the tension sprocket,

It is often a frequent change of torque, which results in confused shifting, and therefore the automatic shifting function can not be performed.

Another is that the structure that controls the powerful torque can not be constructed automatically unless it has the ability to operate flexibly.

A mechanism for controlling the pressure of the tension sprocket easily with a small force by combining the lever and the gear so as to control the frequently changed torque and the strong torque so that the rotation speed of the gear is increased by complexly arranging the gears on the lever;

Apply the engineering theory applied to the lever by lengthening the lever

In order to achieve this, it is possible to select three pegs to control the strong torque easily by adjusting the length of the three pegs.

The relationship of the three speckles is a relationship indicating the mutual lengths of the centrifugal shafts supporting the press levers, the tension sprockets, and the points of the press springs.

The structure of the three speckles is the same as the first embodiment in which the lever and the gear shown in Fig. 2 are synthesized;

And a second embodiment in which the lever shown in Fig. 5 is elongated to form the three spindles of the centrifugal shaft, the tension sprocket, and the press setting of the leaf spring.

In normal bicycle, when the gear is shifted, the right hand is released from the steering wheel and the gear is shifted while manually manipulating the lever, thereby preventing the driver from consuming unnecessary mental power,

The automatic transmission gear structure of a bicycle according to the present invention includes a function of adjusting the strength of a gear shift according to the strength of a male and female AU

When the driver rides the road and climbs up the road or when he / she reaches the ground again, gear shifting is done automatically so that unskilled drivers or women can drive safely.

Fig. 1 is a schematic view showing the first embodiment
Fig. 2 shows a base rod, a tension sprocket, and a power spring that adjust the distance between the press springs and the base sprocket, which can change the mutual distance between the press levers formed integrally with the press gear 102, Side cross-sectional view showing the structure of the regulator
FIG. 3 shows the configuration of the small gear and the large gear, the configuration of the large gear 114, the restriction 114 of the cage rod 120, A perspective view showing a structure that returns to the high-speed state after the restriction rod is pushed by the weight (13)
4 is a schematic view showing an example of the second embodiment
5 is a perspective view showing a configuration of a centrifugal shaft, a tension sprocket receiving pressure, and a controller 143 for easily controlling the press lever 141. Fig.
6 is a side sectional view showing a state of a high speed immediately before gear shifting when traveling on a flat ground,
FIG. 7 shows a state in which the spring of the tension sprocket including the press lever is down by the pressure of the tension sprocket on the uphill road, Side view showing structure constrained to the catch
Description of the Related Art
10, a crankshaft 13, a first gear 14, a second gear
15, a third gear 20, a frame 21, a rear wheel stay
23, a drive sprocket 24, a multistage sprocket 26, a chain
27, a drive chain guide 28, a rear wheel chain guide
100, a press spring (Fig. 2) 101, a press lever 102, a press gear
103, a power regulator (Fig. 2) 104, a base rod
106, a centrifugal shaft 107, a tension sprocket
110, a small gear 111, a large gear 112,
113; 115;
116, a back wire 120, a crotch rod (Fig. 3) 121, a center point
122, a crotch rod 123, a projection 124,
125, a release rod 130, a release weight 131, a tension sprocket moving distance
140, a leaf spring (Fig. 5) 141, a press lever 142, a shift rod
143; Control? 144; 145; Press settings
150, a power regulator 151, a centrifugal shaft 152,
153; Patch lever 154; Patch lever 155; Katchi
156, a restoring spring 160, a release lever 161,
162, a shift stop wire 163, a frame
A: Centrifugal axis B: Tension sprocket point C: Press spring point
a1; AB distance b1; BC distance

[Example]

If you need to change speed while driving in bicycle which is usually used for transportation, or bicycle which is used for sports or leisure, adjust the speed manually by operating each of the two levers on the handle knob.

One of the two levers is a lever for operating a lever which shifts a driving sprocket composed of two or three stages and the other is a lever for shifting a multi-stage sprocket that is installed on the axis of the rear wheel. Shifts along.

The structure of an automatic transmission gear of a bicycle according to the present invention will be described with reference to the drawings

A chain for rotating a multi-stage sprocket of a rear wheel shaft by a power generated in a driving sprocket of a crankshaft,

Generally, the torque is generated only when the force is applied to the forward direction with both feet, and the bicycle ran.

Therefore, the structure that controls the change in the torque that occurs periodically in a short period of time, including control? Equipped with a jack to prevent gear shifting disruption

Generally, a strong torque is generated when the bicycle is started, but since gear shifting is not necessary at this time, And a cage.

A tension sprocket positioned higher than a horizontal plane of the chain;

Since the width and height of the multi-sprocket are different, the tension sprocket, which requires a strong chain pressure, is adapted to the structure in which the height of the chain and the moving distance of the chain change when shifting. A structure for assisting a shift is required to have a structure that is simple and has a flexible control with a weak force.

The tension sprocket being subjected to the strong tension is positioned slightly higher than the horizontal line of the chain so that the tension sprocket is compressed due to the rise of the torque in the uphill road and the gear shift is possible due to the change of the vertical position.

A lever (leverage) is provided to flexibly control the tension sprocket to be subjected to a strong force;

A structure in which the lever is constituted of a starting point, a tension sprocket, and a triple point of a press spring is formed so that mutual position change (change in length) of the three pivot points is made possible

So that the gear shift can be flexibly controlled with ease in accordance with the change in the position of the three pivot points.

Since the distance between the centrifugal shaft (starting point of the press lever) and the tension sprocket is short and the distance between the tension sprocket and the press spring is long, the configuration of the three starting points is controlled easily and smoothly.

The structure constituting the above three points includes a first embodiment in which a press lever and a gear are combined and controlled;

And a third embodiment in which the three levers are formed and controlled by lengthening the press lever

&Lt; Embodiment 1 >

In the driving sprocket 23 shown in Figs. 1-2,

A tension sprocket 107 slightly higher than the horizontal plane of the chain;

In the structure of the multi-stage sprocket (24) of the rear wheels connected to the chain by the usual drive sprocket (23);

The road is run by the torque generated by a normal bicycle pedal;

Since the tension sprocket 107 is positioned slightly higher than the upper surface of the chain, the chain runs at a high speed on a normal flat road and travels in accordance with the state of the road;

When the torque rises due to the leg force of the driver in the uphill road, the tension sprocket 107 located slightly higher than the upper horizontal line of the chain 26 is compressed;

Therefore, the front wire 115 and the back wire 116 including the press lever 101 resiliently pressed against the press spring 100 are compressed downward, and the wire, which is normally used, is shifted at a low speed by pushing and pulling.

The distance between the tension sprocket 107 (point B) and the centrifugal shaft 106 (point A) of the press lever 101 is short;

The pressure of the chain generated by the strong torque generated in the uphill road is strong at the point B and weakened at the point C so that the function of the gear shift is weakened .

The power regulator 103 is configured to flexibly control the operation of changing to low speed and the process of returning to high speed when reaching the ground again

To describe this again, the point of the tension sprocket 107 where a large pressure is required;

The press spring 100 which receives the pressure in the press lever 101 is located at C;

The tension sprocket 107 is located at B;

Establishing a centrifuge shaft (106) A on the base rod (104);

The distance of C from B to b1 and the distance of A from B to a1 so that the distance of a1 becomes a short distance so that the tension sprocket 107 is strongly compressed by the strong torque on the uphill road;

The control unit configured at the long distance of b1 is controlled at low speed and flexibly, and the speed is changed to low speed.

Another purpose is to adjust the distance between b1 and a1 by moving the power regulator 103 to the left or right depending on the power or condition of the bicycle driver.

The distance of b1 is long, and the person with weak strength is short, so it is possible to change the gear according to the power of man, because the distance is adjusted according to the ages of man and woman.

When the torque rises as described above, the presser lever 101 including the tension sprocket 107 is compressed downward by the pressure of the chain, and the connected front wire 115 and the back wire 116 are loosened and pulled And the gear shift is performed at low speed.

In FIG. 3, on the uphill road, the elevator 114 rotates in the forward direction (→) while being free from the elevator rod 120,

) Turns off the rotation.

Also included is the ability to return the speed of the bike to high speed when the ascent is over and the flat or downhill length is reached.

When the bicycle pedal is slightly rotated counterclockwise to return to the high speed after the uphill road has been completed, the tension sprocket 107 is rotated counterclockwise while the release weight 130 pushes the release rod 125 to the right and includes the protrusion 123 The puckchoid rod 120 which pushes the puckchuck rod 122 to the left and restrains the puckuck 114 is lowered from the center point 121 as a starting point and is thus restrained;

2, the disc 113, the small gears 112 and 110, and the large gear 111, which are restrained by the pinch rod 120,

The press lever 101 integrally formed with the press gear 102 is raised by the press spring 100 that has been compressed;

The driving chain guide 27 and the rear chain guide 28 are returned to the high speed position because the front wire 115 and the back wire 116 which are pushed and pulled at a low speed include the wire by the rise of the press arm 101

&Lt; Example 2 &

In the second embodiment shown in FIG. 7 to FIG. 7, the press spring is formed as the leaf spring 140.

In the first embodiment, the torque fluctuation is controlled by combining the press lever 101 and the gears 102, 110, 111 and 112. In contrast, in the second embodiment, since the distance b1 of the press lever 141 is increased, Possible;

In the first embodiment, a press spring 100 formed of a coil spring is applied,

In the second embodiment, the elongated plate spring 140 is applied

In order to prevent the plate spring 140 from being deformed and to maintain accuracy, it is preferable to reduce the thickness of the plate spring and use two or more plates.

In the second implementation

A press lever 141 on which the three starting points are formed;

A centrifugal shaft 151 supported by the base rod 104 serving as a starting point of the press lever, a tension sprocket 107, a press setting 145 serving as a pressure point of the leaf spring 140,

The left end of the elongated plate spring 140 is fixed to the base rod 104 and the right end of the plate spring 140 is pressed by a bolt having a roller formed at an end of the press lever 141 moving up and down.

The left end of the leaf spring 140 is fixed to the base rod 104 fixed to the frame and the right end is fixed to the press lever 141 moving upward and downward, thereby providing the elastic force of the tension sprocket 107.

And a power regulator 150 for determining the position of the tension sprocket 107 in the press lever 141

The purpose of the power regulator 150 is to have a structure that adjusts the three pegs in an opposite proportion

Generally, the hierarchy that owns bicycles includes the ability to accommodate all the strengths of strength because there are several layers such as strong and weak people with strong legs

That is, since the point A at the point A is relatively shorter than the point C, the force is applied to the strong class when the distance of a1, which is the distance between A and B, becomes short, When distance is applied, the force is applied to the weak class, which includes the damping control function of the gear shift

The automatic transmission of the bicycle having the above structure and function is shifted to the low speed corresponding to the driver's power on the uphill road.

When the ascent reaches the uphill road, the control 143 formed at the tip of the press lever 141 including the tension sprocket 107 which receives strong pressure around the centrifugal shaft 151 descends, Is constrained to the jacket 153;

The rear wheel chain guide 28 shifts at a low speed.

At the same time, the shift rod 142 included in the press lever 141 lowers the drive chain guide 27 downward, and the drive sprocket 23 descends at low speed.

When a proper shift is performed at a low speed, control formed at one end of the press lever 141

(143)? So that frequent shifting is prevented.

In a structure in which the driver returns to the high speed according to the state of the road while the vehicle is traveling at a low speed;

What if the driver turns the bicycle pedal in the opposite direction? The catch lever 154 of the catch 153 is moved by the cancel lever 160 to the control lever 144, The press lever 141 returns to the high position due to the force of the leaf spring 140 as it is restrained at the jacket 153.

The release lever 160 is released from the latching protrusion 161 when the pedal is operated in the forward direction;

When the pedal is reversely rotated, the release lever (160) is restrained by the latching protrusion (161). The control lever 143 is brought into close contact with the key lever 154 of the key 153, And returns to the high speed when it is restrained by the jacket 153.

I set up my bike. I need to change gears at low speed even when I first started.

For this purpose, a gear shift stop 144 formed on the rear surface of the control gear 143 is formed, and the gear stopper for restricting the shift stop gear 144 is formed. (155), so when the bicycle is first started, it is prevented from shifting to low speed. When gear change is required while the bicycle is operated, if the lever is changed to the cancellation, The gear set 155 is released and the gear shift is automatically performed.

The stop and release lever of the gear shift can be placed at the handle of the bicycle or at a convenient location.

The limiting screw 152 is provided on the bicycle frame to limit the vertical travel distance of the press lever 141. [

Claims

In a chain for rotating the multi-stage sprocket by a normal driving sprocket (23);
A tension sprocket 107 positioned slightly higher than the horizontal plane of the chain;
A press lever 101 for receiving the tension sprocket;
A base rod 104 for fixing the press lever, a tension sprocket 107 for receiving the pressure of the chain, a press spring 100;
The tension of the tension sprocket under the strong pressure of the chain on the uphill road is weak and the function of the control is weak. Therefore, the distance between the tension sprocket (B) and the base rod (A) The press spring C is located at a long distance from the press spring C;
The press lever 101 for adjusting the distance between a1 and b1 according to the driver's force;
A press gear 102 integrally formed with a press lever 101 constituting a power regulator 103 for flexing a strong pressure of the chain;
Small gears 110 and 112 and a large gear 111 that engage with the press gear 102, which is softened by the rotation of the regulator and whose power is weakened.
(114) constrained together with a disk (113) which is not subject to interference in the forward direction and which is flexibly controlled by interference with the cage rods (120, 122) in a reverse direction;
(114) including said disk (113) which is not subject to interference from the jacket rod (120) during forward rotation when shifting to a low speed during running of the bicycle;
(114) including the disk to prevent reverse rotation since it is constrained to the caterpillar (120) after being shifted to low speed.
When the pedal is reversely rotated in order to return to the high speed, the restraining rod is disengaged and the automatic transmission gear structure of the bicycle, which is composed of the cancellation rod 125 and the release weight 130,

The apparatus of claim 1, further comprising: a press lever 141 including a tension sprocket 107 and a speed change rod 142 with the centrifugal shaft 151 as an axis and having a control shaft 143 and a speed shift stop 144;
A power regulator 150 for adjusting the strength of the force in the press lever 141;
A leaf spring 140 including a press lever 141 to provide elasticity to the tension sprocket 107 because the left end is fixed to the base rod 104 and the right end is set to the press lever 141;
The gear ratio of the press lever 141 is changed to the gear ratio? (143) constrained to the jacket 153;
At the beginning of the bicycle, the shift stop (144) and the restraint (144), which prevent the gear shift and shift only when gear shift is required, (155);
When the drive sprocket 23 is reversely rotated in order to return to a high speed on a downhill road or a flat road after a gear shift at a low speed, the release lever 160 and the latching protrusion 161, Automatic transmission gear structure of bicycle.