KR20150043786A - Power Transmission Apparatus for Increasing Driving Force and Bicycle Having the Same - Google Patents

Abstract

A power transmission apparatus for increasing driving force according to the present invention includes a power generating unit including a frame and a plurality of rotating bars rotatably connected to each other so as not to interfere with each other and having one end rotatably connected to the frame, An external force input unit including an extension bar rotatably connected to an end of the bar and maintaining a state extending forward from the plurality of rotation bar ends and an operation unit provided at a front end of the extension bar to receive an external force, A power transmission part connected to at least one rotation bar of the plurality of rotation bars to transmit a rotation force generated by the rotation of the rotation bar and a driving part connected to the power transmission part, Wherein the center of rotation of the operation unit is located at a position closer to the center of the rotation axis of the one end of the rotation bar connected to the power transmission unit It is positioned in the room.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power transmission apparatus for increasing driving force,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power transmission device capable of increasing a driving force and a bicycle including the same. More particularly, the present invention relates to a power transmission device capable of increasing a driving force, To a power transmission device for increasing driving force and a bicycle including the same.

2. Description of the Related Art Generally, a power transmission device that generates power by using a pedal is widely used for various transportation means such as a bicycle.

Typically, the bicycle includes a main frame that forms an overall appearance, a fork portion that forms a handle, and a front wheel and a rear wheel. A driven sprocket is provided on the rotation axis of the rear wheel, and a driving sprocket is connected to the driven sprocket by a chain. Accordingly, the driven sprocket rotates by driving the driving sprocket.

And a fixing bracket for fixing the driving sprocket and the driven sprocket to the main frame, wherein the rotating shaft of the driving sprocket is provided with a crank arm and a pedal.

In the conventional bicycle constructed as described above, when a force is applied while pushing the pedal, power is transmitted to the driving sprocket through the crank arm to rotate. At this time, the driven sprocket and the rear wheel are rotated by the chain to advance the bicycle .

However, the conventional power transmission device such as a bicycle has a problem that it is difficult to provide an efficient driving force because the driving radius of the pedal, which is a power source of the driving force, is constant and the same driving energy is always provided.

Therefore, a method for solving such problems is required.

Korean Registered Utility Model No. 20-0430313

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide an efficient driving force by positioning the center of rotation locus of an operation unit, which is a power source of a driving force, And a bicycle including the same.

The problems of the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a power transmission apparatus for increasing driving power, including a frame, a plurality of rotating bars rotatably connected to each other in a state in which they are not interfered with each other, An extension bar provided at a front end of the extension bar and connected to the other ends of the rotation bars so as to be rotatable and extending forward from the other ends of the rotation bars, A power transmission part connected to at least one rotation bar of the plurality of rotation bars to transmit a rotation force generated by rotation of the rotation bar and connected to the power transmission part, And a driving unit rotatably driven by the driving unit, wherein a center of rotation of the operating unit is connected to a rotating bar connected to the power transmitting unit, It is positioned forward of the rotational axis center portion.

The power generating unit may further include at least one first gear connected to one end of the at least one of the plurality of rotating bars and rotated.

The power generating unit may include a second gear engaged with the first gear and rotated in a direction opposite to the rotating direction of the first gear and a second gear coupled with the second gear and rotated in the same direction as the rotating direction of the first gear And may further include a third gear.

The power generating unit may further include a first sprocket connected to the rotation shaft of the third gear and rotated together with the third gear, the driving unit may include a second sprocket, and the power transmitting unit may include a first sprocket, And a chain connecting the second sprockets to each other.

Further, the rotation bar may be formed such that the distance from the frame to the other end increases from one end to the other end.

The rotation bar may be provided with three rotation bars, and the rotation bars may be formed such that the rotation axes of the one end and the other end of the rotation bar form an equilateral triangle.

In order to attain the above object, the bicycle of the present invention may include the power transmission device for increasing the driving force.

In order to solve the above-described problems, the driving force transmitting power transmission apparatus and the bicycle including the same are provided with the following effects.

First, the center of rotation locus of the operation unit is located forward of the center of rotation axis of the one end of the rotation bar connected to the power transmission unit, so that the power transmission is made larger on the front side of the rotation locus when operating the operation unit, There is an advantage that it can be maximized.

Secondly, although the center of rotation of the operation unit is located forward of the center of the rotation axis of the one end of the rotation bar connected to the power transmission unit, its radius is the same as before, so that the driving force can be increased without imposing strain on the leg .

Third, in addition to a transportation means such as a bicycle, there is an advantage that it can be universally applied to various devices that apply an external force to transmit a driving force.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a power transmission apparatus for increasing driving power according to an embodiment of the present invention;
Fig. 2 is a side view showing a state in which a plurality of rotating bars are rotated backward in a driving force increasing power transmission apparatus according to an embodiment of the present invention; Fig.
3 is a side view showing a state in which a plurality of rotating bars are rotated forward, in the driving force increasing power transmission device according to the embodiment of the present invention;
4 is a side view showing a gear structure of a power generating portion in a power transmission apparatus for increasing driving power according to an embodiment of the present invention;
5 is a perspective view and a plan view showing a state of a rotating bar in a power transmission apparatus for increasing driving power according to an embodiment of the present invention; And
6 to 9 are side views showing various aspects of the process of rotating the rotating bar in the driving force increasing power transmission device according to the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

In the embodiment of the present invention described below, the power transmission device for increasing the driving force is applied to a bicycle. However, the present invention is not limited to a bicycle, and may be applied to various mechanical devices that transmit power to a driving part by rotation. Of course.

Further, since the essential part of the present invention is the components related to the driving force increasing power transmission device, the description of the general components of the bicycle will be omitted in the following description.

1 is a perspective view illustrating a power transmission apparatus for increasing driving power according to an embodiment of the present invention.

1, the driving force increasing power transmission apparatus according to the embodiment of the present invention includes a frame 50, a power generating unit including a plurality of rotating bars 110, 120, and 130, An external force input section including a control unit 100 and an operation unit 40, a power transmission section 30, and a drive section.

The frame 50 forms the appearance of the power transmitting apparatus for increasing the driving force according to an embodiment of the present invention, which may take various forms according to the applied machinery. In this embodiment, since the driving force increasing power transmission device is applied to a bicycle, the frame 50 forms an outer appearance of the bicycle, and supports and fixes each component such as a handle, a front wheel, and a rear wheel.

The power generating unit includes a plurality of rotating bars (110, 120, 130). The rotation bars 110, 120, and 130 are provided so as to rotate in parallel without interfering with each other, and one end thereof is rotatably connected to the frame 50. That is, in a state where one end portion is connected to the frame 50, the other end portion can be rotated in a circular path.

At this time, a plurality of rotation bars 110, 120, and 130 may be provided. The rotation bars 110, 120, and 130 are rotated in parallel with each other to prevent interference with rotation. This will be described later.

Further, at least one of the rotation bars 110, 120, and 130 may be formed so as to directly participate in the driving force transmission mechanism. That is, one or more of the rotating bars 110, 120, and 130 may be directly or indirectly connected to the power transmitting portion 30 to be described later.

In this embodiment, the power generating portion includes a plurality of gears provided inside the frame 50, not shown in the figure, and a first sprocket 10 connected thereto. However, it goes without saying that this may be added or omitted depending on the type of the power transmitting portion 30 to be described later. Details of this will also be described later.

The external force input unit is connected to the other ends of the plurality of rotation bars 110, 120, and 130 so as to be rotatable. The external force input unit includes an extension bar for maintaining a state extending forward from the other ends of the plurality of rotation bars 110, (100), and an operation unit (40) provided at a front end of the extension bar (100) to receive an external force.

The operation unit 40 is provided to allow a user to apply an external force, and in the case of the present embodiment, is formed in the form of a pedal of a bicycle.

The rear end of the extension bar 100 is connected to the other end of each of the rotary bars 110, 120, and 130 by a rotation shaft, and has a shape extending forward. The rear end of the extension bar 100 is moved together with the rotation trajectories of the other ends of the rotation bars 110, 120, and 130 when the rotation bars 110, 120, and 130 are rotated. At this time, the extension bar 100 is moved along the rotation bars 110, 120, and 130 while maintaining the shape extending forward, and the extension bar 100 is moved to the rotation bars 110, 120, 3-axis.

That is, the extension bar 100 can be rotated together with the respective rotation bars 110, 120 and 130 while maintaining the horizontal state.

The pair of rotation bars 110, 120, 130, the extension bar 100, and the operation unit 40 are provided on both sides of the frame 50, The operation unit 40 can be rotated alternately.

The power transmission unit 30 is directly or indirectly connected to one or more rotation bars 110, 120 and 130 of the plurality of rotation bars 110, 120 and 130 to rotate the rotation bars 110, And transmits the rotational force generated by the rotation of the driving unit to the driving unit.

In this embodiment, the power transmitting portion 30 is formed in a chain shape so as to connect between the first sprocket 10 and the second sprocket 20 of the driving portion, and to rotate the first sprocket 10 in the second sprocket 200).

The power transmitting portion 30 includes the plurality of gears provided in the frame 50 and the first sprocket 10 so that the power transmitting portion 30 is connected to the first sprocket 10 But the present invention is not limited to this embodiment, and the connection type of the power transmitting portion 30 and the power transmitting structure thereof may be variously formed.

For example, the first sprocket 10 may be directly connected to any one of the rotating bars 110, 120, and 130 without a separate gear to directly receive the rotational force, or the first sprocket 10 and the gear It is needless to say that the rotation bars 110, 120, and 130 and the driving unit may be connected to each other in a link manner. That is, the power transmitting portion 30 may have various structures depending on the design of the mechanical device.

The driving unit is connected to the power transmission unit 30 and is rotationally driven by receiving the rotational force of the rotating bars 110, 120, and 130. As described above, in this embodiment, the driving unit includes the second sprocket 20. The second sprocket 20 rotates the rear wheel 25 in response to receiving the rotational force from the power transmitting unit 30, Thus generating the driving force of the bicycle.

FIG. 2 is a side view showing a state in which a plurality of rotating bars 110, 120, and 130 are rotated backward in a power transmission apparatus for driving power increasing according to an embodiment of the present invention. FIG. FIG. 10 is a side view showing a state in which a plurality of rotating bars 110, 120, and 130 are rotated forward in the driving force increasing power transmission device according to the example.

2 shows a state in which the operation unit 40 and the extension bar 100 have moved to the rearmost position of the rotation locus and Fig. 3 shows a state in which the operation unit 40 and the extension bar 100 move to the forefront of the rotation locus State.

That is, when the operation unit 40 and the extension bar 100 move to the rearmost position of the rotation locus, the operation unit 40 to which an external force is applied and the power transmission unit 30 among the rotation bars 110, When the operation unit 40 and the extension bar 100 are moved to the forefront of the rotation locus, the operation unit 40 to which an external force is applied and the rotary bar The distance between the rotating shafts formed at one end of the rotating bar connected to the power transmitting portion 30 among the rotating shafts 110, 120, and 130 is increased.

The center of rotation of the operation unit 40 is located forward of the center of the rotation axis of the one end of the rotation bar connected to the power transmission unit 30, and the moment that is applied to the operation unit 40 on the front side of the rotation locus So that the driving force transmission can be made larger.

4 is a side view showing a gear structure of a power generating portion in a power transmitting apparatus for increasing driving power according to an embodiment of the present invention.

As described above, in this embodiment, the power generating unit includes a plurality of gears provided inside the frame to connect the rotating bars 110, 120, and 130 and the first sprocket to transmit rotational force.

More specifically, as shown in FIG. 4, one or more first gears 210 and 220 connected to one end of one of the plurality of rotation bars 110, 120 and 130 and rotated, A second gear 240 meshed with the gears 210 and 220 and rotated in a direction opposite to the rotation direction of the first gears 210 and 220 and a second gear 240 meshing with the second gears 240, 210 and 220. The third gear 250 rotates in the same direction as the first gear 210,

In other words, in this embodiment, a total of two first gears 210 and 220 are provided. Specifically, the first gear 210 on the upper side is connected to the rotary bar 110 on the upper side, The rotation bar 130 is rotated by a predetermined angle. As a result, in the present embodiment, there are two rotation bars directly involved in transmission of the driving force, and the other central rotation bar 130 serves to support the extension bar 100.

However, it is needless to say that, unlike the present embodiment, the number of the rotary bars involved in the transmission of the driving force may be varied.

In this embodiment, the third gear 250 shares the rotation axis with the first sprocket 10, so that the operation unit 40, the extension bar 100, the rotation bars 110, 120 and 130, The gears 210 and 220 and the second gear 240 and the third gear 250 through the first sprocket 10 and the power transmitting portion 30 through the second sprocket 20 and the rear wheel 25, The driving force is transmitted.

The power transmission structure of the present invention has been described above. In the following, the specific shapes and the rotating structures of the rotating bars 110, 120, and 130 will be described.

5 is a perspective view and a plan view showing a state of the upper rotating bar 110 in the driving force increasing power transmission apparatus according to the embodiment of the present invention. Since the shapes of the rotating bars are all the same, the upper rotating bar 110 will be described by way of example in FIG.

5, the upper rotating bar 110 extends from the one end 112 to the other end 114 side via the connecting portion 116. As shown in FIG. At this time, the upper rotating bar 110 is formed so that the distance from the frame to the other end increases from one end to the other end.

That is, the connection portion 116 is formed to be inclined so that the one end portion 112 and the other end portion 114 are formed to differ from each other by a certain distance w with respect to the plan view. Thus, one end 112 of the upper rotary bar 110 rotatably connected to the frame is in contact with the frame, while the other end 114 of the upper rotary bar 110 has a shape extending laterally from the frame.

According to this structure, the plurality of rotation bars can be rotated in parallel without interfering with each other.

6 to 9 are side views showing various aspects of the process of rotating the rotating bars 110, 120, and 130 in the driving force increasing power transmission device according to an embodiment of the present invention.

6, each of the rotation bars 110, 120, and 130 of the present embodiment is formed such that the rotation axes of the first ends 112, 122, 132 and the other ends 114, 124, Respectively. That is, the distances d formed between the respective rotary shafts are all formed to be the same, so that the extension bar can be supported so as to maintain a shape extending forward while smoothly moving the extension bar along the orbit.

In the case of FIG. 6, the other ends 114, 124 and 134 of the rotating bars 110, 120 and 130 are positioned at the rear end of the trajectory, and each of the rotating bars 110, They are positioned so as not to intersect with each other.

As shown in FIG. 7, the other end 124 of the lower rotation bar 120 is rotated by the rotation of the central rotation bar 130 ) Of the connecting portion (136). Since the distance between the rotary bars 110, 120 and 130 gradually increases from the frame toward the other ends 114, 124 and 134 as described above, the other end 124 of the lower rotary bar 120 Will be spaced a greater distance from the frame than the connecting portion 136 of the central turning bar 130. Thus, the lower rotating bar 120 does not interfere with each other when crossing the central rotating bar 130.

The other end portion 124 of the lower rotation bar 120 intersects with the connection portion 116 of the upper rotation bar 110 as shown in FIG. The end portion 124 is spaced from the frame by a greater distance than the connecting portion 116 of the upper rotating bar 110, so that interference does not occur.

9, the other end portion 134 of the central rotation bar 130 passes over the connection portion 116 of the upper rotation bar 110 and can be smoothly rotated without interference.

That is, even if the rotating bars 110, 120, and 130 rotate in parallel with each other due to their shapes, the rotating bars 110, 120, and 130 rotate without interference with each other and can support the extended bars by three axes, So that it can be circulated.

It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit or scope of the invention as defined in the appended claims. It is obvious to them. Therefore, the above-described embodiments are to be considered as illustrative rather than restrictive, and the present invention is not limited to the above description, but may be modified within the scope of the appended claims and equivalents thereof.

10: first sprocket 20: second sprocket
25: rear wheel 30: power transmission portion
40: Operation unit 50: Frame
100: extension bars 110, 120, 130: rotation bars
210, 220: first gear 240: second gear
250: Third gear

Claims (7)

frame;
A power generating unit including a plurality of rotating bars, one end of which is rotatably connected to the frame, so as to be rotated in parallel without interfering with each other;
An extension bar connected rotatably to the other end of the plurality of rotary bars and extending forward from the other end of the rotary bar, and an operation unit provided on the front end of the extension bar to receive an external force An external force input unit;
A power transmission part connected to at least one rotation bar of the plurality of rotation bars to transmit rotational force generated by rotation of the rotation bar; And
A driving unit connected to the power transmitting unit and rotatably driven by receiving a rotational force of the rotating bar;
/ RTI >
Wherein the center of rotation of the operating unit is positioned forward of the center of the rotating shaft of the one end of the rotating bar connected to the power transmitting portion. The method according to claim 1,
The power generation unit includes:
Further comprising at least one first gear connected to one of the plurality of rotating bars and rotated at one end of the at least one rotating bar. 3. The method of claim 2,
The power generation unit includes:
A second gear engaged with the first gear and rotated in a direction opposite to a rotation direction of the first gear; And
A third gear engaged with the second gear and rotated in the same direction as the rotational direction of the first gear;
Further comprising: a power transmission mechanism for increasing the driving force. The method of claim 3,
The power generating portion further includes a first sprocket connected to the rotation shaft of the third gear and rotated together with the third gear,
Wherein the driving portion includes a second sprocket,
And the power transmitting portion includes a chain connecting the first sprocket and the second sprocket to each other. The method according to claim 1,
Wherein the rotation bar is formed such that a distance from the frame to the other end increases from one end to the other end. The method according to claim 1,
The rotating bar is provided with three pieces,
Wherein the rotary bar is provided such that the rotary shafts of the one end and the other end thereof have an equilateral triangle with respect to each other. A bicycle including the power transmission device for increasing the driving force according to any one of claims 1 to 6.

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