KR20070025552A - The bicycle which does not have the speed changer gear - Google Patents

Abstract

A bicycle without speed changing gears is provided to safely ride the bicycle by preventing a separation of a chain and a trouble of an auxiliary unit which can be generated when the chain is moved to the right and to the left for a gear change. A bicycle includes a crank(10), a drive sprocket(20), at least one chain(30), and at least one auxiliary sprocket(40). The crank is provided between front and rear wheels. The drive sprocket is provided in a rotational shaft of the rear wheel to transfer the rotational force to the rear wheel. The chain surrounds the outer peripheral surfaces of the crank and the drive sprocket to transfer the rotational force of the crank to the drive sprocket. The auxiliary sprocket is provided on the inner side of the chain between the crank and the drive sprocket. The auxiliary sprocket is rotatably fixed to one side of the bicycle frame and is moved in association with the chain.

Description

Variable Speed Bikes {The bicycle which does not have the speed changer gear}

1 is a front view showing an example of a conventional gear shift bicycle,

Figure 2 is a front view showing a first embodiment of the variable speed bicycle of the present invention,

3 is a front view showing a second embodiment of the variable speed bicycle of the present invention,

Figure 4 is a front view showing a third embodiment of the variable speed bicycle of the present invention,

Figure 5a is a front view showing an example of the interlock means of the variable speed bicycle of the present invention,

Figure 5b is a front view showing another embodiment of the interlock means of the variable speed bicycle of the present invention,

Figure 5c is a front view showing another embodiment of the interlock means of the variable speed bicycle of the present invention.

[Explanation of symbols for the main parts of the drawings]

1: front wheel 2: rear wheel

2A: axis of rotation 3: bicycle frame

3A: fixing plate 3B: upper fixing plate

3C: lower fixing plate 10: crank

20: drive sprocket 30: chain

31: first chain 32: second chain

40: secondary sprocket 41: first secondary sprocket

41A: Upper Gear 42: Second Auxiliary Sprocket

42A: upper gear 42B: lower gear

43: upper third auxiliary sprocket 44: lower third auxiliary sprocket

51 gear 52 double sprocket

53: gear chain 53A: round plate

The present invention relates to a bicycle that moves by pedaling with human force, and more specifically, installs two wheels set up in front and rear rows, and a crank and chain and a sprocket equipped with a pedal for transmitting human force between the two wheels. And a non- variable speed bicycle provided with at least one auxiliary sprocket between the crank and the sprocket to reduce power for power transmission.

Conventional bicycles started from the play of the old French aristocrats, and since then is one of the recreational equipment that is widely used as a recreational equipment in the world.

Meanwhile, before World War II, Korea started from producing parts mainly for repairs, and in the late 1950's, it developed in earnest with the production of pipes.

Due to its characteristics, bicycles require a lot of human power to transmit rotational force to the rear wheels, especially when climbing hills or mountains, and it is difficult for the elderly and women to get off the bicycles and then pull up the bicycles. There was a problem that was harder.

Therefore, in order to easily climb a steep slope such as a hill or a mountain as shown in FIG. 1, a plurality of sprockets 100 having different sizes from each other are provided on the crank and the sprocket. Bicycles are widely used.

However, while there are people who handle the shifting gear skillfully while driving, there are many people who cannot use the shifting gear because it is difficult for an elderly adult or a person without prior knowledge to operate the gear smoothly.

In addition, mountain bikes that climb mainly on hills or mountains and have a low level of driving are difficult to shift daily while climbing mountains, and the gear ratio used to easily climb mountains is inadequate.

However, the regular variable speed bicycle is difficult to climb and descend the mountain, so the mountain bike with unnecessary high gear is purchased and used.

On the other hand, when shifting to a high gear according to the topographical situation, the power required for one crank rotation is small, but the amount of rotation of the rear wheel decreases by one rotation, increasing the overall crank rotation and consequently consuming less power, which is consumed by physical strength. There was a problem that is large.

Accordingly, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to have a constant gear ratio without a separate gear operation in a general non-variable bicycle having a small sprocket and a relatively large crank. To provide a variable speed bike with less effort to climb up and down the plains and hills.

An object of the present invention as described above, having two wheels lined in front and rear, and provided with a bicycle frame for supporting the wheels and a handle for direction adjustment, the bicycle having a means for rotating the wheels, Crank is provided between the front and rear wheels to rotate by the force of the attraction; And

A drive sprocket provided on a rotation shaft of the rear wheel to transmit rotational force to the rear wheel; and

At least one chain surrounding an outer circumferential surface of the crank and the drive sprocket and transmitting a rotational force of the crank to the drive sprocket; And

And at least one auxiliary sprocket provided inside the chain between the crank and the driving sprocket, rotatably fixed to one side of the bicycle frame, and interlocked with the chain.

On the other hand, according to the first embodiment of the auxiliary sprocket in the present invention, the bicycle frame in front of the drive sprocket is provided with a fixing plate having a length upwards, and the chain and the upper gear is interlocked to rotate the upper end of the fixing plate Achieved by being the first secondary sprocket.

In addition, according to the second embodiment of the auxiliary sprocket according to the present invention, the second sprocket is relatively rotatably fixed to the bicycle frame in front of the driving sprocket, and is provided with a second auxiliary sprocket larger than the driving sprocket, and the chain and the first The upper and lower gears of the two auxiliary sprockets are interlocked and rotated, and are achieved by including interlocking means for interlocking the second auxiliary sprocket and the drive sprocket.

On the other hand, in the third embodiment of the auxiliary sprocket in the present invention, the bicycle frame in front of the drive sprocket is provided with a vertical fixing plate having a length in the vertical direction, the upper and lower fixing plates are provided at both ends, and rotates through the chain It is achieved by including an upper and lower third auxiliary sprocket, the interlocking means for interlocking the upper and lower third auxiliary sprocket and the drive sprocket on one side of the upper and lower fixing plate.

In addition, in the present invention, the interlocking means is achieved by being a gear provided between the driving sprocket and the auxiliary sprocket and engaged on both sides.

On the other hand, according to another embodiment of the interlocking means according to the present invention, the first and second sprockets having the same size as the drive sprocket and the auxiliary sprocket, the first crank and the drive sprocket and the auxiliary sprocket to rotate in conjunction And a second chain which rotates in association with the chain and the drive sprocket and each of the double sprockets.

In addition, according to another embodiment of the interlocking means according to the present invention, the gear sprocket having the number of teeth corresponding to the gear ratio of the driving sprocket and the auxiliary sprocket is provided by the gear chain fixed to surround the chain on the outer circumferential surface of the circular plate. do.

The above and other objects, advantages and features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which preferred embodiments are shown.

Hereinafter will be described in more detail by the accompanying drawings of preferred embodiments of the present invention.

2 is a front view showing a first embodiment of the variable speed bicycle of the present invention, Figure 3 is a front view showing a second embodiment of the variable speed bicycle of the present invention, Figure 4 is a third of the variable speed bicycle of the present invention Figure 5a is a front view showing an embodiment, Figure 5a is a front view showing an example of the linkage of the variable speed bicycle of the present invention, Figure 5b is a front view showing another embodiment of the linkage of the variable speed bicycle of the present invention, Figure 5c Is a front view showing another embodiment of a linkage device of a variable speed bicycle of the present invention.

In the non-variable bicycle according to the present invention, the bicycle having two wheels arranged in a row in front and rear, and having a bicycle frame for supporting the wheels and a handle for direction adjustment, the bicycle having a means for rotating the wheels, the front and rear The crank 10 is provided between the wheels (1, 2) and rotates by the force of the attraction force, and the drive sprocket (20) is provided on the rotating shaft (2A) of the rear wheel (2) to transmit the rotational force to the rear wheel (2) And at least one chain 30 surrounding the outer circumferential surfaces of the crank 10 and the driving sprocket 20 and transmitting the rotational force of the crank 10 to the driving sprocket 20.

On the other hand, provided in the chain 30 between the crank 10 and the drive sprocket 20, rotatably fixed to one side of the bicycle frame 3, at least one interlocked with the chain 30 It is provided with the above auxiliary sprocket 40, which will be described in more detail as follows.

First, as the first embodiment of the auxiliary sprocket 40 is provided with a fixing plate 3A having a length upwards on the bicycle frame 3 in front of the drive sprocket 20, the upper end of the fixing plate 3A The chain 30 and the upper gear 41A is provided with a first auxiliary sprocket 41 which rotates in linkage.

Second, the second auxiliary sprocket 40 is rotatably fixed to the bicycle frame 3 in front of the driving sprocket 20 and is larger than the driving sprocket 20. 42, the upper and lower gears 42A and 42B of the chain 30 and the second auxiliary sprocket 42 are interlocked with each other to rotate the second auxiliary sprocket 42 and the driving sprocket 20. It is provided including an interlocking means for interlocking.

Third, as a third embodiment of the auxiliary sprocket 40, the bicycle frame 3 in front of the driving sprocket 20 is provided with upper and lower fixing plates 3B and 3C having lengths up and down, and the upper and lower fixing plates. (3B, 3C) is provided at both ends, and provided with the upper and lower third auxiliary sprockets 43 and 44 rotating through the chain 30, the upper and lower third on one side of the upper and lower fixing plates 3B and 3C. Auxiliary sprocket (43, 44) and the drive sprocket 20 is provided including an interlock means for interlocking.

On the other hand, in the second and third embodiments, the interlocking means is provided between the drive sprocket 20 and the auxiliary sprocket 40 and the gear 51 is engaged with both sides.

In addition, as another embodiment of the interlocking means of the second and third embodiments, it is provided with a double sprocket 52 having the same size as the drive sprocket 20 and the auxiliary sprocket 40, and the crank 10 And the first chain 31 which rotates by interlocking the driving sprocket 20 and the auxiliary sprocket 40, the double sprocket 52 of the driving sprocket 20, and the second and third auxiliary sprockets ( It is provided with a second chain 32 that rotates in conjunction with the double sprocket 52 of the 42, 43, 44.

On the other hand, as another embodiment of the interlocking means of the second and third embodiment, the number of teeth corresponding to the gear ratio of the drive sprocket 20 and the auxiliary sprocket 40 and the chain on the outer peripheral surface of the circular plate (53A) It consists of the gear chain 53 fixed to wrap.

The variable speed bicycle of the present invention configured as described above has a large radius of motion of the drive sprocket 20 among bicycles constituted by the crank 10 and the drive sprocket 20 and the chain 30 surrounding them. By having a secondary sprocket 40 to have a high-speed rotation, such as a low-speed bicycle using a small force as a whole, will be described in more detail through a preferred embodiment of the present invention.

As a first embodiment of the present invention, as shown in FIG. 2, the drive sprocket 20 fixes the first auxiliary sprocket 41 fixed through the fixing plate 3A projecting to the bicycle frame 3 with an upper length. ) Provided at the front upper side, when the crank 10 is rotated clockwise to rotate the drive sprocket 20, the first auxiliary sprocket 41 is interlocked with the chain 30. By rotating, the first auxiliary sprocket 41 is rotated to rotate the drive sprocket 20.

Therefore, the crank 10 rotates the drive sprocket 20 and the first auxiliary sprocket 41 so that the amount of rotation is reduced as connected to the gear ratio of the lower stage.

However, the drive sprocket 20 receives the rotational force of the chain 30 and the rotational force of the first auxiliary sprocket 41 at the same time, the amount of force required for one rotation of the drive sprocket 20 is reduced.

Meanwhile, as a second embodiment of the present invention, as shown in FIG. 3, the second auxiliary sprocket 42 provided in the front bicycle frame 3 of the driving sprocket 20 and relatively larger than the driving sprocket 20 is shown. And the chain 30 surrounding the crank 10, the drive sprocket 20, and the second auxiliary sprocket 42, and the second auxiliary relatively larger than the drive sprocket 20. It includes the gear 51 provided to rotate between the sprockets 42 separately.

On the other hand, when the crank 10 is rotated in the clockwise direction, the amount of force is dispersed due to the second auxiliary sprocket 42 that is relatively larger than the driving sprocket 20, and the transfer of the chain 30 causes the The drive sprocket 20 is rotated, and the gear 51 provided to be engaged between the second auxiliary sprocket 42 and the drive sprocket 20 provides an amount of force required for one rotation of the drive sprocket 20. It is possible to disperse once again.

Thus, since the second auxiliary sprocket 42 allows the crank 10 to have a low gear ratio, the crank 10 needs a small amount of rotation, and at the same time the gear 51 and the chain 30 By dispersing the amount of force required to rotate to the drive sprocket 20 through the amount of force required for one rotation of the crank 10 is reduced.

Meanwhile, as a third embodiment of the present invention, the upper and lower fixing plates 3B and 3C having lengths up and down on the front bicycle frame 3 of the driving sprocket 20 are formed as shown in FIG. 4, respectively. The chain 30 which rotatably mounts the upper and lower third auxiliary sprockets 43 and 44 and surrounds the crank 10, the driving sprocket 20, and the upper and lower third auxiliary sprockets 43 and 44. ) And the gear 51 for rotating the upper and lower third auxiliary sprockets 43 and 44 and the driving sprocket 20 to the upper and lower fixing plates 3B and 3C, respectively.

Meanwhile, when the crank 10 is rotated, the upper and lower third auxiliary sprockets 43 and 44 and the driving sprocket 20 which are provided on the upper and lower sides are wrapped and rotated as one sprocket, so that the crank 10 has a lower end. While the amount of rotation is reduced as in conjunction with the sprocket, the upper and lower third sprockets (43, 44) provided on the rear upper and lower side is rotated to the drive sprocket 20 due to the gear 51 provided to engage with it In addition to the rotational force and at the same time the rotational force generated by the transfer of the chain 30 is coupled to consequently it is possible to rotate the crank 10 with less force.

As described above, the present invention requires less power than a conventional continuously variable bicycle without a separate gear operation, and the speed can be referred to as an advanced technology capable of producing a high speed such as a continuously variable bicycle.

On the other hand, in the present invention it is specified that the gear 51 is used as the interlocking means as a preferred embodiment, the drive sprocket 20 and the second and the upper and lower sides as shown in Figure 5a and 5b It is provided with the double sprocket 52 which has the same number of teeth as the 3rd auxiliary sprocket 42, 43, 44, The crank 10 and the said 2nd and the upper and lower 3rd auxiliary sprockets 42, 43, 44 It is also possible to be provided with a first chain (31) surrounding the () and a second chain (32) wrapping between the rear double sprocket (52).

In addition, in the present invention, the interlock means is used to mount the gear 51 as a preferred embodiment, but as shown in FIG. 5C, the gear ratio of the driving sprocket 20 and the auxiliary sprocket 40 may be reduced. It is also possible to be provided with the gear chain 53 having a number of teeth and fixed to surround the chain on the outer peripheral surface of the circular plate (53A).

By using the variable speed bicycle of the present invention configured and functioned as described above, it is possible to climb with a small force without shifting to reduce the force required while climbing a mountain, and the chain is generated by moving the chain left and right for gear shifting. It is possible to drive more safely because there is no deviation of the balance and auxiliary device, and it has the effect of reducing the need for high gear that is not frequently used in daily life.

Claims (7)

A bicycle having two wheels arranged in a row in front and behind, having a bicycle frame for supporting the wheels and a steering wheel for direction adjustment, and having a means for rotating the wheels, between the front and rear wheels (1, 2). Crank 10 is provided and rotated by the force of the attraction; And A drive sprocket 20 provided on the rotation shaft 2A of the rear wheel 2 to transmit rotational force to the rear wheel 2; and At least one chain 30 surrounding the outer circumferential surfaces of the crank 10 and the driving sprocket 20 and transmitting the rotational force of the crank 10 to the driving sprocket 20; And At least one auxiliary device provided inside the chain 30 between the crank 10 and the driving sprocket 20 and rotatably fixed to one side of the bicycle frame 3 and interlocked with the chain 30. Sprocket 40; a variable speed bicycle characterized in that provided. According to claim 1, wherein the auxiliary sprocket 40 is provided with a fixing plate (3A) having a length in the upper side to the bicycle frame (3) in front of the drive sprocket 20, at the upper end of the fixing plate (3A) The variable speed bicycle, characterized in that the first auxiliary sprocket (41) rotates in conjunction with the chain (30) and the upper gear (41A). The second auxiliary sprocket (40) according to claim 1, wherein the auxiliary sprocket (40) is rotatably fixed to the bicycle frame (3) in front of the driving sprocket (20) and is relatively larger than the driving sprocket (20). And the upper and lower gears 42A and 42B of the chain 30 and the second auxiliary sprocket 42 are interlocked and rotated, and the second auxiliary sprocket 42 and the driving sprocket 20 are rotated. A variable speed bicycle comprising an interlocking means. The bicycle frame 3 in front of the drive sprocket 20 is provided with upper and lower fixing plates 3B and 3C having a length vertically, and the upper and lower fixing plates 3B. 3C) both ends are provided with upper and lower third auxiliary sprockets 43 and 44 rotating through the chain 30, and the upper and lower third auxiliary sprockets on one side of the upper and lower fixing plates 3B and 3C. (43,44) and the variable speed bike characterized in that it comprises an interlock means of the drive sprocket (20). 5. The variable speed bicycle according to claim 3 or 4, wherein the linkage means is a gear (51) provided between the driving sprocket (20) and the auxiliary sprocket (40) and engaged at both sides. The method according to claim 3 or 4, wherein the linkage means is provided with a double sprocket 52 having the same size as the drive sprocket 20 and the auxiliary sprocket 40, the crank 10 and the drive sprocket A first chain 31 which rotates by interlocking 20 with the auxiliary sprocket 40, and a second chain 32 that rotates by interlocking with the drive sprocket 20 and the respective double sprockets 52; A variable speed bicycle comprising a. The gear according to claim 3 or 4, wherein the interlocking means has teeth corresponding to the gear ratio of the driving sprocket 20 and the auxiliary sprocket 40, and is fixed to surround the chain on the outer circumferential surface of the circular plate 53A. Variable speed bicycle, characterized in that provided with a chain (53).

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