KR910001413B1 - Front wheel drive bicycle - Google Patents

Abstract

The bicycle has a main wheel an auxiliary wheel and a dual crank system. The bicycle includes; pedal (10) and central shaft (2) formed at the centeral portion of main wheel (1); crank shaft (3), for driving independent of the shaft (2), connected with another crank shaft (12) by chain.

Description

Front-wheel drive bicycle

1 is an explanatory diagram of Example 1 in which the present invention is practiced.

2 is an explanatory diagram of the basic structure of the present invention.

FIG. 3 is a supplementary explanatory view of the drive configuration shape and working relationship between the central axis and the crankshaft in FIG. 2; FIG.

4 is an explanatory diagram of Example 2 in which the present invention is implemented.

5 is an explanatory diagram of Example 3 in which the present invention is implemented.

6 is an explanatory diagram of Example 4 in which the present invention is practiced.

7 is an explanatory diagram of Example 5 in which the present invention is practiced.

* Explanation of symbols for main parts of the drawings

1: main wheel 2: central axis (中心 軸)

3: crankshaft 4: inner bearing

5: wheel axle 6: outer bearing

7: cog wheel 8: crank

9: pedal stand 10: pedal

11: upper gear 12: upper crankshaft

13: bearing ring 14: upper crank

15: bearing groove 16: chain

17: chain 18: center frame

19: rear frame 20: saddle

21 handle 22 saddle pipe

23: rear frame 24: auxiliary wheel shaft

25: auxiliary wheel 26: brake

27: brake handle 28: top frame

29: spokes

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a front wheel drive bicycle having high wheel rotation efficiency because the bicycle is composed of one main wheel and a double crank structure, which is easy to carry and double driven by a front wheel drive method.

Conventionally, bicycles driven by cranks located in the center of two main wheels are mainstream, and their volume and weight are large, making them impossible to carry and difficult to transport when riding a car or a train. The unicycle was small in volume but inefficient in driving rotation, and thus could not be put to practical use because of its strength and much mastery.

According to the present invention, the main wheel is formed in various forms as necessary based on the auxiliary wheel based on the main wheel, and the dual wheel is configured inside the main wheel to drive the front wheel in two stages connected with different crank shafts. Significantly reduced weight to less than half of conventional bicycles, making it possible to carry and to move and store, as well as to achieve more than twice the rotational efficiency with the driving power of conventional bicycles, and was invented so that it can be used without requiring additional mastery. Describe in detail.

First, in order to help understand the present invention will be described by Example 1 of the embodiment of the present invention, "a" is a perspective view and "b" is a side view of Figure 1, Figure 2 is a main wheel which is the main body of the present invention ( 1) part and center frame 18 are explanatory views and FIG. 3 is a technical configuration in which the central axis 2 and the crankshaft 3 of the A part are driven among the explanatory diagrams to which the logic of FIG. 2 is applied. And explanatory diagrams for explaining the interaction relationship with the arrangement state.

For convenience of explanation, first of all, the first aspect of the present invention will be described with reference to FIGS. 1 and 2, the upper frame (28), the lower part of the main wheel (1) as the center of the present invention configuration The lower frame 23 in the direction, and the center frame 18 in the center direction, respectively, and the rear frame 21 is connected to the outer side upward and attach the handle 21 to the saddle 20 to the top.

In addition, after the rear frame (19) and the lower frame (22), the auxiliary wheel 25 is installed on the auxiliary wheel shaft (24) to form the entire external structure, and then adjacent to the main wheel (2) adjacent to the upper frame (28). Install the brake (26) on the top and attach the brake handle (27) on the top to connect with the brake connecting line.

FIG. 2 is a view for explaining in detail the internal structure of the crank portion and the main wheel of the center frame 18 of FIG. 1. First, the crank (3) inside the central axis (2) in contact with the center frame (18). The shaft is connected to the inner bearing (4) to separate or liberated rotation, and the left and right ends of the crank shaft (3), respectively, the pedal stand (9), the pedal 10 is in contact.

In addition, the wheel shaft (5) of the main wheel (1) is connected by the central shaft (2) and the outer bearing (6) to the outside of the central shaft (2) is also separately glass and rotated. The cog wheel 7 is installed and is rotated simultaneously with the main wheel 1.

Meanwhile, the upper crankshaft 12 is contacted with the center frame 18 and the bearings 13 and 15 to the upper end of the center frame 18 so that the upper crank 14 and the top gear 11 rotate. have.

The upper cogwheel 11 of the upper part is connected to the lower crank 8 and the upper crank 14 by the cogwheel 7 of the lower main wheel 1 by chains 16 and 17, respectively.

Therefore, in the structure of the present invention, when the user interviews the pedal 10, the crank shaft 3 rotates only by the bearing 4 inside the central shaft 2, so that only the crank 8 rotates, By rotating the lower cogwheel 11 and the upper crankshaft 12 and the upper crank 14 by the chains 16 and 17, it rotates the lower cogwheel 7 by the chain 16 again. Drive the wheel (2).

Of course, at this time, the main wheel (1) is driven separately from the pedal 10 by being driven separately by the central axis (2) and the outer bearing (6).

This is a technical configuration for driving the central axis (2) and the crankshaft (3) separately in the driving method of the present invention by the "A" part of the Figure 2, the dotted line part of Figure 2, the "A" and "B" in Fig. The following describes in more detail to help understand the configuration shape and arrangement state and interaction relationship of the.

That is, in the configuration of the central shaft 2, the central shaft 2 is fixed and fixed to the central frame 18, as shown in FIG. 3, and the inner bearing 4 is installed inside both ends of the central shaft. The crankshaft 3 is inserted into the inside bearing 4, and the crank 8 is comprised by one side of the crankshaft 3, and the closing stand 9 is comprised by the both sides. In addition, the crank 8 is connected to the upper cogwheel 11 and the chain 17 of the upper surface of FIG.

Therefore, in such a configuration, when the user rotates the cradle 9 to rotate the crankshaft 3, since the internal bearing 4 acts, the user is completely separated from the central axis 2 and rotated. Only the crankshaft 3 and the crank 8 which are irrelevant to the main wheel 1 are rotated.

In addition, the rotation of the main wheel (1), as shown in the "b" in Figure 3, the outer bearing (6) is installed on both ends of the central shaft (2) connected to the center frame (18) inside the outer bearing (6) The furnace has a central shaft (2) connected to the wheel shaft (5) of the main wheel (1) to the outside, and one side of the furnace is in contact with the cog wheel (7) and the wheel shaft (5) as a result, the main wheel (1) And the wheel axle 5 and the cogwheel 7 are rotated together.

That is, the crankshaft 3 and the crank 8 are rotated separately by the inner bearing 4 by the driving force of the pedal 10, as shown in the diagram of FIG. 3, based on the central axis 2. The inner crank together with the wheel shaft (7), the main wheel (1) and the cog wheel (7), which are connected to the outer bearing (6), as shown in the drawing of FIG. It is driven separately from the shaft (3).

Thus, the power generated by the pedal 1 rotates the crank 8, which in turn rotates the upper cogwheel 11 by the chain 17, at which time the upper cogwheel 11 and the top crank 14. ) Is rotated at the same speed to rotate the main wheel (1) by the lower cogwheel (7) by the chain (16), the cogwheel and the top cogwheel of the cogwheel (7) and the crank (8) at this time The proportion of the number of gears of (1) and the top crank 14 has a close relationship with the rotation of the main wheel (1).

In other words, the ratio of the number of gears of a general bicycle crank and rear wheel is usually 2.2: 1 and the circumference of the wheel is about 2M, so it is usually driven about 4,5M in one crank rotation.

The present invention also consists of a ratio of 2.2: 1 of the crank (8) and the top cogwheel 11 and the ratio of the top crank (14) and the bottom cogwheel (7) is also composed of 2.2: 1 is known to drive this As shown in the figure, the mechanical efficiency of the double pulley is the same as that of the conventional driving force, whereas the rotation speed of the main wheel 2 is 1: 2.2: 2.2: 1 in the case of the rotation of the closed moon 10. Been driven more than twice as far as the conventional bicycle.

Therefore, if the proportion of the gear wheel is properly reduced, the same distance can be driven with the conventional reduced force. Even if the volume is minimized by reducing the circumference of the main wheel 1 by half with the same logic, the rotation efficiency will be the same as before. There is a number.

FIG. 4 is an explanatory diagram illustrating an example of the application of FIG. 3 to help understand the application. However, in the example of the present application, the auxiliary wheel 25 is rotated by the swivel 30 as needed. The structure and construction logic thereof are the same as those described above except that they can be rotated and folded.

5 is the same structure as the logic described in FIG. 2, but the upper and lower crankshafts (8, 12) and the cog wheels (7, 11) are composed of a composite structure on one side of the center frame (18). Since the structural logic and operation logic are as described in FIG. 2, detailed description thereof will be omitted.

FIG. 6 is an explanatory diagram of an embodiment in which the present invention is implemented, and the dual wheels are formed inside the main wheel 1 so that the front wheels can be driven in two stages connected to the different crank shafts 12. It is the same as Example 1 of Example. However, the upper two of the crankshaft (12) to form the main wheel (1) front direction and the center frame (18) to the upper direction formed by the rear frame (19) and the bearing (31) connected to the handle ( 32) is attached to facilitate the direction rotation, and the other partial configuration is the same as the above embodiment, the structure and configuration logic is the same as FIG.

7 is also an explanatory view of an embodiment in which the present invention is carried out, wherein "a" is a side view and "b" is a bottom view.

As described above, the example of the present embodiment configures a dual shaft inside the main wheel 1 so that the front wheels are driven in two stages connected to different crank shafts 12 as described above.

However, by placing the center frame 18 and the top frame 28 in a horizontal direction, the rear frame is connected to the rear frame 19 and the glass is rotated mutually so that the saddle 20 is placed at the upper end thereof, and the auxiliary wheel shaft ( 33) two auxiliary wheels 25 were used, and the rest of the configuration was the same as in the above embodiment.

Therefore, the present invention can be used in various forms of convenient shape according to the configuration of each frame (18, 19, 23) as in the above embodiment as well as known gear shift in the upper crankshaft (12) portion In addition to the device, the driving efficiency may be increased, and various accessory gears may be properly combined to increase driving efficiency.

In addition, it is possible to adjust the height of the saddle 20 to stop the main wheel (1) by the brake handle (27) device, it is also possible to use urethane and synthetic resin instead of the wheel (29) and to cover the appearance to look good It can be attached and can use multiple auxiliary wheels as needed.

In addition, the structure and the crank structure of the various frames as described in the embodiments of the above may be implemented in a variety of models by inserting the original for each, but the two different crank shafts and cog wheels by forming a double shaft inside and outside the reference axis (2) The logic and the gist of the present invention, which reduces the weight and volume while driving the front wheels in two stages, are the same.

Therefore, since the present invention has only one main wheel 1, its volume and weight can be significantly reduced than a conventional bicycle, so that it is easy to carry and use, and it is easy to carry and use in a narrow space such as a car or an elevator. The bicycle of the present drive device, which is front-wheel driven by a two-stage drive device by a rotating shaft, can have a rotational drive force with a significantly higher efficiency than the conventional one.

Claims (1)

A pedal 10 and a rotational central shaft 2 are formed at the center of the main wheel 1 of the bicycle, and the central shaft 2 is composed of two stages to be separated and driven separately from the crank shaft 3. The crankshaft (3) is a front-wheel drive bike, characterized in that the main crank (1) is rotated by being configured in a chain with a separate crankshaft (12) again.

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