KR101490848B1 - Frame for bicycle, and bicycle including the same - Google Patents

Abstract

When the bicycle is manufactured using the bicycle frame, the front and rear wheels can be arranged and fixed on the same rotation axis when the bicycle is folded. Further, since the two wheels can be driven in a folded state, have.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a bicycle frame,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle frame and a bicycle including the bicycle frame. More particularly, the present invention relates to a bicycle frame and a bicycle including the bicycle frame.

Generally, the bicycle is constituted in such a manner that the front wheel is configured as a steering wheel and the rear wheel is configured as a drive type, and the power of the person traveling is converted into rotational motion through a crank mechanism and transmitted to the rear wheel through the chain. Recently, with the rise of environmental problems, there is an increasing tendency to use bicycles that do not emit pollutants at all, instead of transportation using fossil fuels.

Despite the positive aspect of these bicycles, there is a problem that the housing type of the big city is not easy to carry and store because it is a group residence type like apartment. Particularly, a resident of a high-rise apartment uses an elevator or the like, and a general bicycle is often bulky and inconvenient to be carried by an elevator.

Recently, folding bicycles have been widely used to solve these problems. However, the conventional folding bicycle has a disadvantage in that it is designed only in the direction of reducing the volume because it is simply constructed to be easy to load on the trunk of the vehicle. That is, although the conventional folding bicycle reduces the volume to a certain level in order to save space, there is an inconvenience that the user must pick it up and carry it in a folded state. That is, there is a problem that it is difficult to carry the bicycle when the user folds the bicycle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems of the conventional bicycle, and it is an object of the present invention to provide a bicycle frame which is designed to be foldable and which can be transported by driving both wheels in a folded state, And to provide the above-mentioned objects.

Further, the present invention provides a bicycle frame and a bicycle including the bicycle frame, the bicycle frame being designed to be fixed in a folded state of the frame and more convenient to carry in a folded state.

The object of the present invention is not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

A bicycle frame according to the present invention includes: a pair of front forks opposed to each other with a front wheel being rotatable; a handle post having one end connected to the pair of front forks and the handle bar disposed at the other end; A head tube inserted in such a manner that a part thereof is freely pivoted; And a hinge plate having first and second hinge tubes arranged opposite to each other at the other end, a seat tube having a crank tube formed at one end thereof, a seat tube having one end fixedly inserted into the seat tube, A pair of rear forks fixed to the seat tube and each having a rear wheel rotatably mounted thereon and a pair of rear forks fixed to the seat tube and supporting both ends of a fixed shaft inserted into the first hinge tube Wherein the first and second hinge tubes comprise a pair of fixed shaft supports and a pair of separation shaft supports fixed to the seat tube and supporting both ends of a separation shaft inserted into the second hinge tube, Wherein the fixed shaft is disposed perpendicularly to a virtual axially extending line connecting the rotational axes of the respective rear wheels, And the separation shaft is inserted into the pair of separation shaft supports and the second hinge tube so as to be fixed or detachable. When the front frame is rotated about the fixed shaft, And the rotation axes of the rear wheels are arranged on the same line.

In addition, the separation shaft of the bicycle frame according to the present invention includes: a long shaft in the longitudinal direction; And a clamp formed at one end of the shaft rod.

Further, the bicycle frame according to the present invention may further include a first separation shaft fastener formed on one of the pair of front forks and a second separation shaft fastener formed on any one of the pair of rear forks. Thus, when the front frame is rotated about the fixed shaft, the first separation shaft fastener and the second separation shaft fastener are arranged on the same line, and the separation shaft is connected to the first and second separation shaft fasteners Can be inserted and fixed at the same time.

Further, the present invention is characterized by providing a bicycle including the above bicycle frame.

The bicycle frame according to the present invention can be easily folded or unfolded by anyone without an adult since the folding structure and the method are very simple. In addition, when the bicycle is manufactured using the bicycle frame, the front and rear wheels can be arranged and fixed on the same rotation axis when the bicycle is folded. Since the two wheels can be driven in a folded state, There is an advantage.

1 is a perspective view of a bicycle manufactured using a bicycle frame according to the present invention.
2 is a side view of a bicycle according to the present invention.
3 is a partially enlarged view for explaining a rotating structure of the front frame in the bicycle according to the present invention.
FIGS. 4 and 5 are views for explaining a state in which the separating shaft is removed from the bicycle according to the present invention, and FIGS. 6 and 7 are views for explaining a state of firmly fixing the bicycle in a folded state using the separating shaft.
FIG. 8 is a perspective view showing a folded state of the bicycle according to the present invention, and FIG. 9 is an exemplary view showing a state in which the user carries the folded bicycle according to the present invention.

Hereinafter, preferred embodiments of a bicycle frame and a bicycle including the bicycle frame according to the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts will be omitted when it is determined that the gist of the present invention can be unnecessarily disturbed.

1 to 3, a head tube 120 is formed at one end of the front frame 100, and a hinge plate 140 is formed at the other end thereof. Here, the head tube 120 is formed to have a predetermined inclination angle with respect to the main body of the front frame 100. The restoring force, stability, and steering performance of the front wheel 300, which rubs the road surface according to the inclination angle Respectively. The head tube 120 is formed in a hollow tube shape, and a part of the handle post 200 is inserted therein so as to be freely rotatable.

A pair of front forks 220 are connected and fixed to one end of the handle post 200 protruded via the head tube 120 so that the front wheel 300 is rotatable. A pair of front forks 220 are disposed opposite to each other and a hub 310 of the front wheel 300 is installed in a shaft hole (not shown) formed at one end of the front forks 220. Thus, the front wheel 300 can be steered through the handle bar 210 and the grip 214 formed at the other end of the handle post 200 in the direction in which the occupant steers.

A hinge plate 140 having a pair of hinge tubes 141 and 142 disposed opposite to each other is installed at the other end of the front frame 100. Each of the first and second hinge tubes 141 and 142 disposed opposite to each other on both sides of the hinge plate 140 has a hollow tube shape. The fixed shaft 710 and the separation shaft 720 may be inserted into the first and second hinge tubes 141 and 142, respectively.

Both ends of the first hinge tube 141 are sandwiched between the two fixed shaft supports 712 and 714. One end of each of the fixed shaft supports 712 and 714 is provided with a fixed shaft insertion port 716. The fixed shaft 710 has two fixed shaft insertion ports 716 and a first hinge tube 141 interposed therebetween And inserted and fixed. The fixed shaft supports 712 and 714 are fixed to the seat tube 400.

Similarly, both ends of the second hinge tube 142 are sandwiched between the two separation shaft supports 722, 724. A separating shaft inserting port 726 is provided at one end of each separating shaft supporter 722 and 724 so that the separating shaft 720 has two separating shaft inserting holes 726 and a second hinge tube 142 interposed therebetween And can be inserted and fixed. Here, as shown in FIG. 5, for example, the separation shaft 720 may include a long shaft rod 720a in the longitudinal direction and a clamp 720b formed at one end of the shaft rod 720a. The separation shaft 720 is inserted and fixed into the separation shaft insertion port 726 and the second hinge tube 142 formed at one end of each of the separation shaft supporters 722 and 724 when the bicycle is ridden, Can be separated. That is, the user can remove the shaft rod 720a from the second hinge tube 142 and the separation shaft insertion port 726 using the clamp 720b. The separation shaft supports 722 and 724 are fixed to the seat tube 400.

Next, the seat tube 400 is formed with a crank tube 410 at one end thereof. The crank tube 410 is provided with a crankshaft (not shown), and two crank arms 430 are fixed to both ends of the crank shaft 410 with a cotter pin (not shown). The user steps on the pedal 432 to rotate the crank arm 430 to drive the chain sprocket 442, the chain 440 and the rear axle sprocket 612 to transmit the rotational force to the rear wheel 600.

In this seat tube 400, a pair of rear forks, to which a rear wheel is rotatably mounted, are fixed. Here, each of the rear forks may be configured to include, for example, a chain stay 510 and a seat stay 520. One end of the seat post 420 may be inserted into the seat tube 400. A seat 412 is provided at the other end of the seat post 420 and a seat clamp 414 which can be fixed after the length of the seat tube 400 is adjusted can be additionally provided.

Meanwhile, the rear wheel 600 may include a hub motor 610. The hub motor 610 can use a non-resistance motor designed to prevent the motor from being loaded when the user drives the pedal 432 without using the electric motor. In addition, when traveling using electric power, a battery 462 for supplying electric power can be fixed and supported by a battery stand 460 provided separately.

When the above-described bicycle frame is used, the bicycle can be folded by turning around the fixed shaft 710 as shown in Fig. 3 to 5, the separating shaft 720 is detached from the second hinge tube 142 and the separating shaft supporters 722 and 724, and then the front frame 100 ). Thereafter, the rotation axis FC of the front wheel 300 and the rotation axis RC of the rear wheel 600 are arranged on the same line (see FIG. 2). In this case, the front wheel 300 and the rear wheel 600 can be rotated about the same rotation axis FC and RC even when the bicycle is folded, so that the user P can grip the grip 214 It is easy to hold and carry.

6 and 7, a first separating shaft fastener 222 is formed on one side of the front fork 220 and a second separating shaft fastener is formed on one side of the rear fork (e.g., the seat stay 520) A fastener 522 can be formed. Preferably, when the fixed shaft 710 is formed on the left side with respect to the front surface as in the present embodiment, the first front fork 220 and the left seat stay 520 are provided with first and second separation shaft fasteners (222, 522). When the front frame 100 is rotated around the fixed shaft 710, the first separation shaft fastener 222 and the second separation shaft fastener 522 are arranged such that the through holes formed therein are aligned with each other The separation shaft 720 can be inserted and fixed to the first and second separation shaft fasteners 222 and 522 arranged as described above. Therefore, even when the bicycle is folded, the folded state can be firmly maintained by using the separating shaft 720. [

In particular, as shown in FIG. 2, the first and second hinge tubes 141 and 142 formed on both sides of the hinge plate 140, respectively, when the front wheel 300 and the rear wheel 600 are installed, FC) and the rotation axis RC of the motor vehicle. That is, each of the first and second hinge tubes 141 and 142 is preferably formed parallel to a virtual perpendicular line T perpendicular to the imaginary axis-of-axis extension L. In addition, it is preferable that the hinge plate 140 is designed to be arranged substantially at the center of the imaginary axis-of-axis extension L. With this arrangement and design, when the front frame 100 is rotated about the fixed axis 710 (i.e., when the bicycle frame is folded), the rotational axis FC of the front wheel 300 is rotated in the rear wheel 600, As shown in FIG.

The above-described bicycle frame can be folded in a relatively simple manner, and the folded state can be firmly maintained. The bicycle frame according to the present invention can be easily folded or unfolded by anyone without an adult since the folding structure and the method are very simple. In addition, when the bicycle is manufactured using the bicycle frame, the front and rear wheels can be arranged and fixed on the same rotation axis when the bicycle is folded. Since the two wheels can be driven in a folded state, There is an advantage.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is therefore to be understood that the embodiments of the invention described herein are to be considered in all respects as illustrative and not restrictive, and the scope of the invention is indicated by the appended claims rather than by the foregoing description, Should be interpreted as being included in.

Claims (4)

A pair of front forks opposed to each other in which a front wheel is rotatably installed,
A handle post having one end connected to the pair of front forks and the other end having a handle bar,
A head tube inserted at one end such that a part of the handle post is freely rotatable; And a hinge plate having first and second hinge tubes disposed opposite to each other at the other end,
A seat tube having a crank tube formed at one end thereof,
A seat post having one end fixedly inserted into the seat tube and a seat provided at the other end,
A pair of rear forks fixed to the seat tube and each having a rear wheel rotatably mounted thereon,
A pair of fixed shaft supports fixed to the seat tube and supporting both ends of a fixed shaft to be inserted into the first hinge tube,
And a pair of separation shaft supporters fixed to the seat tube and supporting both ends of a separation shaft inserted into the second hinge tube,
Wherein the first and second hinge tubes are disposed perpendicular to an imaginary axially extending line connecting the rotational axes of the front wheel and the rear wheel respectively,
Wherein the fixed shaft is fixed at both ends thereof by the pair of fixed shaft supports, the separating shaft is inserted into the pair of separation shaft supports and the second hinge tube so as to be fixed or removable,
Wherein a rotation axis of the front wheel and a rotation axis of the rear wheel are arranged on the same line when the front frame is rotated about the fixed axis,
A first separation shaft fastener is formed on one of the pair of front forks and a second separation shaft fastener is formed on one of the pair of rear forks, and when the front frame is rotated about the fixed shaft The first separation shaft fastener and the second separation shaft fastener are arranged on the same line, and the separation shaft is inserted and fixed to the first and second separation shaft fasteners at the same time.
The method according to claim 1,
The separation shaft includes: a long shaft in the longitudinal direction; And a clamp formed at one end of the shaft rod.
delete A bicycle comprising a bicycle frame according to any one of the preceding claims.

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