KR200350705Y1 - Plate reinforced frame for bicycle - Google Patents

Abstract

The present invention relates to a frame of a bicycle, the down-tube (down-tube) constituting the bicycle frame in two rows and to install a reinforcement plate between them, so that the weight can be reduced while maintaining the strength of the frame.

Through the present invention, by expanding the base of the bicycle population and activating the use of bicycles, as well as the development of related industries, it is possible to reduce the use of transportation means using fossil fuels, thereby contributing to energy saving and environmental conservation.

Description

Plate-shaped reinforcement bicycle frame {PLATE REINFORCED FRAME FOR BICYCLE}

The present invention relates to a frame of a bicycle, by configuring the down tube constituting the bicycle frame in two rows and installing a reinforcing plate between them, so that the weight can be reduced while maintaining the strength of the frame.

Looking at the general structure of the frame constituting the bicycle body, as shown in Figure 4, the top tube (Top-tube) 30, seat tube (Seat-tube) 20 and down tube (Down) -tube (10) is formed in an inverted triangle to form a basic skeleton, the head tube (Head-tube) (40) is formed at the connection point of the top tube 30 and the down tube 10, the handle 63 ) And a front fork 64 are installed, and the seat tube 20 and the seat stay 51 and the chain stay 52 are connected to the chain and sprocket. In addition, power transmission and wheels will be installed.

The basic triangular bicycle frame of the inverted triangle is structurally very stable, but the space under the saddle 61 is blocked by the top tube 30, which not only restricts the pedaling action but also the skirt of the female There was a problem with the top tube 30.

In order to solve this problem, as shown in FIG. 5, the bicycle frame of the form in which the top tube 30 has been removed has been developed and used. However, in order to overcome the mechanical weakness, the cross section of the down tube 10 must be enlarged. There is a problem that the weight of the is increased and the welding area of the joint is also increased.

In particular, while mountain bikes have recently been spotlighted as leisure sports, various modified frames such as soft-tail bikes have emerged from the existing frame forms, and the weight and impact resistance are further increased. In the required situation, there is a limit to the conventional strength reinforcement through cross-sectional enlargement.

The present invention was devised in view of the above-described problems, and the down tube 10 of the bicycle frame is composed of two rows of the upper down tube 11 and the lower down tube 12 and a reinforcement plate 13 is installed therebetween. Thus, it is possible to reduce the weight while maintaining the strength of the frame.

In addition, the reinforcing plate 13 to form a through-hole 14 penetrating it, so that it can be utilized as a handle and the like with light weight.

1 is a perspective view of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA ′ in FIG. 1. FIG.

3 is a front view of the present invention.

Figure 4 is a front view of a conventional triangular bicycle frame.

5 is a front view of a conventional bicycle frame without the top tube.

6 is a state of use of the present invention

7 is a perspective view of an embodiment of the present invention in which a through hole is formed.

8 is a perspective view of an embodiment of the present invention applied to a soft-tail bike.

<Code Description of Main Parts of Drawing>

10: Down-tube

11: upper down tube

12: lower down tube

13: reinforcement plate

14: through hole

20: Seat tube

30: Top-tube

40: Head-tube

51: seat-stay

52: Chain-stay

61: saddle

62: crankshaft

63: handle

64: Front-fork

65: shock absorber

First, the present invention, as shown in Figures 1 and 3, the upper down tube 11 and the lower down tube 12 and the head tube 40, the seat tube 20, the seat stay 51 connected to the reinforcement plate 13 ) And chainstays 52, the connection of each component is described in detail as follows.

A vertical reinforcement plate 13 is installed between the upper down tube 11 and the lower down tube 12 arranged side by side on a vertical plane, and the head tube (head tube) is provided at both ends of these two rows of down tubes 11 and 12, respectively. 40 and the seat tube 20 are rigid.

One end of the seat stay 51 and the chain stay 52 is tightened to the upper and lower portions of the seat tube 20, respectively. The other ends of the seat stay 51 and the chain stay 52 are also tightened to each other.

The frame of the present invention, as shown in Figure 6, the wheel and various power transmission, steering and braking device is combined to constitute a bicycle.

Figure 2 is a cross-sectional view showing a connection state of the upper down tube 11, the lower down tube 12 and the reinforcing plate 13 connecting them of the present invention, a pair of circular or oval tube (pipe) vertical plate It is possible to secure the maximum cross-sectional secondary moment while using the minimum material, thereby effectively resisting the bending and torsion on the bicycle frame.

Figure 7 is to form a through-hole 14 in the reinforcing plate 13, so that it can be utilized as a handle and the like with light weight.

In addition, Figure 8 is an embodiment of the present invention applied to the soft-tail bike (soft-tail bike), the structure of the soft tail bike that can not be applied to the rigid triangular frame due to the rear shock absorber 65 through the present invention The vulnerability can be greatly improved.

After all, the technical idea of the present invention, in the frame of the bicycle, the seat tube 20, the saddle 61 and the crankshaft 62 is installed at the top and bottom, respectively, the handle 63 and the front fork at the top and bottom, respectively The head tube 40 is installed 64 is connected to the upper down tube 11 and the lower down tube 12, these upper down tube 11 and the lower down tube 12 is located on the vertical plane, the upper As a plate-shaped reinforcement bicycle frame, characterized in that the vertical reinforcement plate 13 is installed between the down tube 11 and the lower down tube 12,

The reinforcing plate 13 is a plate-shaped reinforcement bicycle frame, characterized in that the through-hole 14 is formed.

The present invention makes it possible to reduce the weight while maintaining the strength and durability of the bicycle, and by expanding the base of the bicycle population and activating the use of bicycles, the development of related industries as well as the reduction of the use of fossil fuel transportation. It can also contribute to energy saving and environmental conservation.

Claims (2)

In the frame of the bicycle, the seat tube 20, the saddle 61 and the crankshaft 62 is installed at the top and bottom, respectively, and the head 63 and the front fork 64 is installed at the top and bottom, respectively The tube 40 is connected to the upper down tube 11 and the lower down tube 12; These top down tubes 11 and bottom down tubes 12 are located on a vertical plane; Plate-shaped reinforcement bicycle frame, characterized in that the vertical reinforcement plate 13 is installed between the upper down tube (11) and the lower down tube (12). The plate-shaped reinforcement bicycle frame according to claim 1, wherein the reinforcing plate (13) is formed with a through hole (14).