KR200219860Y1 - Adjustable crank shaft of bike - Google Patents

Abstract

The present invention relates to a variable driving device of a bicycle to exhibit the maximum driving energy with the minimum driving energy by allowing the distance between the pedal shaft and the pedal to be extended and variable when the driving force is transmitted.

A fixed gear 6 fixedly coupled to both sides of the pedal shaft 4, a planetary gear 7 of the drive case 5 interlocked with the fixed gear 6, and a drive case 5 in conjunction with the planetary gear 7. In the variable pedal drive device consisting of a drive bar (5) for extending the variable distance of the pedal from the pedal shaft (4) at the time of the driving direction of the drive), and the electric gear (11) in conjunction with the planetary gear (7) , A drive gear 12 interlocked with the electric gear 11, a rotation bar 13 coupled to the drive gear 12 to rotate, a left and right spiral groove 15 formed on the rotation bar 13, and rotation. The left and right spiral grooves 15 of the bar 13 are provided in the guide hole 16 of the drive bar 9 to be inserted and coupled in a freely rotatable state, and the guide bar 16 side of the drive bar 9 to rotate the bar. The driving bar 9 coupled to the rotation bar 13 may be selectively engaged with any one of the spiral grooves 15a and 15b of the left and right spiral grooves 15 formed in the horizontal movement so as not to expand and contract. What it consists of guide pin 18 it is characterized.

Description

Variable pedal drive system of bicycle {ADJUSTABLE CRANK SHAFT OF BIKE}

The present invention relates to a variable driving device of a bicycle to exhibit the maximum driving energy with the minimum driving energy by allowing the distance between the pedal shaft and the pedal to be extended and variable when the driving force is transmitted.

In the conventional bicycle, the distance between the pedal shaft and the pedal is fixed to provide the driving force only by the driving force by the forward rotation of the pedal. The driving structure of the conventional bicycle (the driving force providing structure) has a constant rotational force of the pedal from the pedal shaft. Since it is made within the radius of rotation, it will naturally require more driving energy and stamina, especially on uphill climbs and long distances.

In order to improve such a problem, a gear shift gear is installed on the driving shaft (pedal shaft) to shift the pedal's driving energy optimally according to the driving conditions to display the acceleration energy, thereby maximizing the driving energy. This is widely generalized.

However, since the rotation radius of the pedal which is the driving force of the driving force is constant, only the same driving energy is always provided, so it is difficult to expect to provide a more fundamental and efficient driving force, so that the maximum driving energy can be exhibited with less driving energy consumption. The development of a new driving device that can increase the driving energy efficiency of the system was required.

Therefore, in the present design, the rotation radius of the pedal is extended and changed from the pedal shaft to the driving direction so that the maximum driving energy can be maximized with the minimum driving energy consumption, thereby maximizing the efficiency of the bicycle driving energy. In addition, the present invention aims to provide a variable pedal drive device for a bicycle that can achieve many advantages, such as minimizing physical consumption and fatigue during long distance driving.

1 is a cross-sectional view showing a preferred embodiment of the present invention

2 is an exploded perspective view of the main portion of the present invention

Figure 2a is a cross-sectional view of the main portion of Fig.

3 is a cross-sectional view of the main portion of the subject innovation

Figure 4a, 4b is a cross-sectional view of the operating state of the present invention

5 is a view showing the operation state of the present invention

☞ Explanation of symbols used in the main part of the drawing ☜

1; frame 2; axes

3; shaft 4; pedal shaft

5; drive case 6; fixed gear

7; planetary gear 9; drive bar

10; Operator 11; Electric Gear

12; drive gear 13; swivel bar

14; bearing 15; left and right helix groove

16; guide 17; pedal assembly

18; guide pin 19; assembly

20; retaining bolt 21; retaining pin

1 is a cross-sectional view showing an embodiment of the present invention, Figure 2 is an exploded perspective view of the main portion of the present invention, Figure 3 is a cross-sectional view of the main portion of the present invention,

The present invention is characterized in that the pedal distance (4) coupled to the chain sprocket for converting the rotational force of the pedal to the driving energy to maximize the running energy by allowing the distance of the pedal to expand and vary to the maximum, bar below Looking at the configuration of the present invention in detail as follows.

The shaft tube 3 is coupled to the shaft hole 2 of the bicycle frame 1, and the pedal shaft 4 is coupled to the shaft tube 3.

The pedal shaft 4 is fixedly coupled to both ends of the drive case 5, but the fixed shaft 6 is coupled to both ends of the shaft pipe 3, in which the pedal shaft 4 is built, in the vertically upward direction of the fixed gear 6. It engages with the planetary gear 7 at a position inclined at a predetermined angle in the running direction (clockwise).

Then, the driving bar 9 interlocked with the planetary gear 7 slides on the operating hole 10 of the driving case 5 to rotate the driving case 5 in the driving direction (clockwise direction). This variable drive is already known, as it causes 9 to be expanded in the running direction (clockwise).

Hereinafter, the characteristic configuration of the present invention will be described in detail.

On the coaxial of the planetary gear (7) meshed with the fixed gear (6) of the pedal shaft (4) is coupled to the electric gear (11) rotatably supported by the bearing (14) to interlock with the planetary gear (7), The electric gear 11 is engaged with the driving gear 12 at right angles, such as a bevel gear, and the driving gear 12 is coupled with the rotation bar 13 to rotate in the same direction.

The rotary bar 13 rotates and supports one end to the bearing 14 on the drive case 5, and on the other side, the left and right spiral grooves 15 (the right spiral grooves and the left spiral grooves are formed to cross each other) are driven. It is inserted into the guide hole 16 of the bar (9).

A pedal assembly hole 17 is formed at the outer end of the drive bar 9 to engage the pedal, and the guide hole 16 of the drive bar 9 is either one of the left and right spiral grooves 15 of the rotation bar 13. It is coupled to the spiral grooves (15a, 15b) of the coupling is coupled to the guide pin 18 for guiding the rotation of the rotary bar (13).

The guide pin 18 is formed in a circular shape so as to be freely rotated in any direction in the assembly assembly hole 19 formed from the outside at the end of the guide hole 16 of the driving bar (9) and the assembly bolt on the outside ( Combining 20) so as not to be separated, it forms a locking piece 21 is guided to the left and right helix groove (15).

Since the engaging piece 21 is engaged with the left and right helix grooves 15 of the rotary bar 13 to guide the rotation bar 13 to rotate so that the contact surface thereof has the same circular arc as the left and right helix grooves 15. It is preferable to form.

The drive gear 12 has a rotation ratio of 1: 2 with respect to the electric gear 11, so that the electric gear 11 rotates once when the drive case 5 rotates once, and the electric gear 1 The drive gear 12 is rotated two times at the time of one rotation, and the left and right spiral grooves 15 of the rotation bar 13 coupled to the drive gear 12 are the left and right spiral grooves at the time of one rotation of the drive gear 12. The rotation pitch is constituted such that the entire pitch P of 15 is operated by one lead, and the driving bar 9 reaches the horizontal line in the driving direction from the rear horizontal line according to one rotation of the driving case 5. It is preferable to carry out expansion and contraction in the upward semicircle rotation, and conversely, in the downward semicircle movement from the horizontal line in the driving direction to the rear horizontal line, it is preferable to implement the rotation ratio. Operation according to the above-described rotation ratio will be described in detail later.

In the figure, reference numeral 8 shows an installation of the chain sprocket.

The present invention constituted as described above, when the drive case 5 is rotated by stepping on the pedal, the planetary gear 7 geared to the fixed gear 6 of the pedal shaft 4 rotates and the electric gear 11 interlocks therewith. The rotational force of the transmission is transmitted to the driving gear 12 engaged at right angles to the rotary bar 13 by rotating the rotation bar 13 is engaged with the left and right helix groove 15 and the guide pin 18 of the rotary bar 13 to move horizontally The driving bar 9 is slide-extended from the operating hole 10 of the drive case 5, so that the distance of the pedal from the pedal shaft 4 is extended and changed at the time of driving, thereby exhibiting the maximum driving energy with the minimum driving energy. It will be described below with respect to the operation of the present invention.

4A and 4B are functional state diagrams of the present invention. First, the present invention shows that when the drive case 5 is positioned on the rear horizontal line as shown in FIGS. 4A and 5, the guide pin 18 of the drive bar 5 is moved. The left and right spiral grooves 15 of the rotary bar 13 are engaged with the ends of the inner side (drive case inner side) of the rotary bar 13, so that all of the left and right spiral grooves 15 of the rotary bar 13 are guided to the guide hole 16 of the driving bar 9. It is in the inserted state.

Hereinafter, the operation of the present invention will be described with this as the basic state.

When the driving case 5 is rotated in the driving direction (clockwise) in the basic state as described above, the planetary gear 7 coupled with the fixed gear 6 also rotates in the driving direction by the rotation of the driving case 5, The electric gear 11 interlocked with the planetary gear 7 also rotates.

When the electric gear 11 rotates in the driving direction as described above, the driving gear 12 meshed with the electric gear 11 at a right angle rotates to rotate the rotation bar 13.

At this time, the rotation bar 13 is the left and right helix groove 15 is engaged with the guide pin 18 on the guide hole 16 side of the drive gear 12, so when the rotating bar 13 rotates the guide pin ( The rotary bar 13 is guided to rotate in a state in which one of the left and right spiral grooves 15a is engaged with the locking piece 21 of the driving member 21, and thus the driving bar 9 is operated by the operating hole of the driving case 5. In 10) it moves horizontally.

That is, when the rotary bar 13 is rotated by driving the driving case 5 located at the rear in the driving direction, the guide pins 18 engaged at the ends of the left and right spiral grooves 15 as shown in FIGS. 4A and 5 are left and right. Since the helical groove 15a of either side of the spiral groove 15 is guided, the rotating bar 13 in which the left and right spiral grooves 15 are inserted in the guide hole 16 operates the driving bar 9. (10) It moves outward and gradually comes out.

As described above, when the rotation bar 13 rotates once by the rotation of the drive gear 12 and the drive case 5 is located in the vertically upward direction of the pedal shaft 4 (the aforementioned electric gear 11: drive gear ( 12) when the drive gear 12 is rotated 1/2 at a rotation ratio of 1: 2), as shown in FIG. 5, the left and right spiral grooves 15 of the rotation bar 13 are released from the drive bar 9. The driving bar 9 is pushed outward through the operating hole 10 of the driving case 5 to expand, and when the driving case 5 is rotated 90 ° again in the driving direction to come on the horizontal line, left and right spiral grooves 15a ) As the guide pin 18 of the drive bar 9 is positioned at the outer side (outer direction of the drive case 5), the drive bar 9 is fully extended out of the operating hole 10, that is, the maximum expansion variable. It becomes a state.

In this state, if the driving case 5 again rotates downwardly, the rotation bar 13 also rotates. At this time, the guide pin 18 of the driving bar 9 is positioned at the outer end of the left and right spiral grooves 15a. As it does not proceed any further, the direction is switched while being guided to the spiral groove 15b of the other one direction formed cross.

This is because the guide pin 18 is engaged with the left and right spiral grooves 15 in a state capable of rotating flow, and after the guide pin 18 is guided to the outer end of one of the left and right spiral grooves 15a, the rotating bar 13 In accordance with the constant rotation direction (rotation bar 13 is always rotated in the same direction.) This time the guide pin 18 is rotated to the opposite side spiral groove (15b), the locking direction is switched to the spiral groove (15b) of the other direction ) Is combined.

Therefore, the rotation bar 13 is rotated to the inside of the guide hole 16 of the drive bar 9 by the rotation of the rotation bar 13 which is also continuously rotated in the same direction by the rotation of the drive case 5 which rotates downward. You will be guided and moved.

As the rotary bar 13 is rotated in the guide hole 16 of the driving bar 9 and the driving case 5 comes downward in the vertical direction as shown in FIG. 5, the left and right spiral grooves 15b of the rotating bar 13 are again. ) Pulls the drive bar (9), and when the position is completely rearward as in the initial basic state (when the drive gear (12) rotates once again) all of the left and right spiral grooves (15) of the rotation bar (13) The driving bar 9 is completely pulled to be positioned in the state of being inserted into the guide hole 16 of 9).

Again, if the drive case 5 continues to rotate in the driving direction, the guide pin 18 is switched to the spiral groove 15a in the other direction and is pushed to push the rotation bar 13 out of the drive bar 9. The expansion variable movement of the drive bar 9 is performed by repetition of the above-described operation to take an operation.

As described above, the present invention provides a driving energy capable of exerting the maximum driving energy with the minimum driving energy by extending the distance of the pedal from the pedal shaft 4 to the maximum when the pedal of the bicycle is traveling in the traveling direction. By maximizing the effect, it is possible to minimize the stamina consumption in the uphill climbing and long distance driving, and to accelerate the driving speed with little force, and it can be applied to various bicycles for leisure and sports, and many benefits and effects can be expected. .

Claims (3)

A fixed gear 6 fixedly coupled to both sides of the pedal shaft 4, a planetary gear 7 of the drive case 5 interlocked with the fixed gear 6, and a drive case 5 in conjunction with the planetary gear 7. In the variable pedal drive device consisting of a drive bar (5) for extending the variable distance of the pedal from the pedal shaft (4) to the maximum in the driving direction of An electric gear 11 interlocked with the planetary gear 7, a drive gear 12 interlocked with the electric gear 11, a rotation bar 13 coupled to the drive gear 12 to rotate, and a rotation bar ( Left and right helix groove 15 formed in the 13, the guide hole 16 of the drive bar 9 is inserted into the left and right helix groove 15 of the rotating bar 13 in a rotatable state, and the driving bar ( It is provided on the side of the guide hole 16 of 9) and alternatively engaged to any one of the spiral grooves (15a, 15b) of the left and right spiral grooves (15) formed in the rotary bar 13 is coupled to the rotary bar (13) The variable pedal drive of the bicycle, characterized in that it comprises a guide pin (18) for guiding the operation bar (9) to move horizontally. The method of claim 1, The guide pin 18 is coupled to the direction changeable outside the guide hole 16 of the drive bar (9), the locking piece 21 of the side of the line engaged with the left and right helix groove 15 of the rotary bar (13) Variable pedal drive of the bicycle, characterized in that the rotation of the rotary bar 13 at both ends of the left and right helix grooves (15a, 15a, 15b) to be alternatively redirected to guide the engagement. . The method of claim 1, Drive gear 12 coupled to the electric gear (11) and the rotation bar (13) linked to the planetary gear (7) is a variable pedal drive device of a bicycle, characterized in that they are engaged with each other at right angles.