WO2011005005A2

WO2011005005A2 - Joining structure for a frame of a bicycle

Info

Publication number: WO2011005005A2
Application number: PCT/KR2010/004386
Authority: WO
Inventors: 홍재호
Original assignee: 제너럴로터(주)
Priority date: 2009-07-06
Filing date: 2010-07-06
Publication date: 2011-01-13
Also published as: KR100938175B1; WO2011005005A3

Abstract

The present invention relates to a joining structure for a frame of a bicycle. The present invention provides a joining structure for a frame of a bicycle having a main frame including a horizontal tube, a vertical tube, an inclined tube, a pair of seat stay tubes and a pair of chain stay tubes. One side of the horizontal tube and one side of the inclined tube are joined to a head tube cell. The other side of the horizontal tube, one side of the vertical tube and one side each of the pair of seat stay tubes are joined to a seat tube cell. The other side of the vertical tube, the other side of the inclined tube and one side each of the pair of chain stay tubes are joined to a bottom tube cell. The other side of the pair of seat stay tubes and the other side of the pair of chain stay tubes are joined to a drop-out tube cell. The abovementioned tubes and cells are joined by a joining member through a press-fitting process. The joining member is a hollow cylinder having a stopper protrusion formed at the center of an outer surface thereof. A plurality of slits is formed into a predetermined length inwardly from both ends of the joining member, respectively, extending from the center of the stopper protrusion. Each of the slits has an end with a through-hole. A plurality of sawteeth protrusions are formed inwardly from the both ends of the joining member, respectively. The sawteeth protrusions are formed at the surfaces between the stopper protrusion and the slits with through-holes, respectively. The present invention eliminates the necessity of a welding process to prevent bicycle accidents caused by faulty welding. The elimination of a welding process results in an economical advantage in a manufacturing process, and eliminates the need for expensive welding equipment. The present invention finishes a painting process for joining members such that the joining members have a variety of patterns prior to an assembly process, thus achieving an aesthetic enhancement. The present invention utilizes not only the same type of metals but also metals of different types, synthetic resins or a variety of natural materials, thus obtaining a variety of designs and an aesthetic enhancement. The present invention enables the assembly of the bicycle frame and the production of the bicycle having an independent model design.

Description

Bicycle frame coupling structure

The present invention relates to a frame coupling structure of the bicycle, and more particularly to a frame coupling structure of the bicycle to have a rigid coupling and rigidity while connecting the coupling of the main frame of the bicycle to the connection member without welding.

In general, the main frame structure of the bicycle is usually made of a diamond shape consisting of a reinforcement structure to maintain the rigidity, and some of the frame is made of a modified structure. Therefore, in order to form a frame structure of a bicycle having a diamond shape, the joining or connection between the members of each frame is made by welding.

As described above, welding performed for joining or connecting the frame causes welding defects due to thermal stress, impurity inflow, welding time, and immature welding technology. In addition, the joining of the frame by welding is difficult to expect the production of an excellent bicycle frame and the finished vehicle body due to thermal deformation of the dimension.

In addition, the welding process for the combination of the bicycle frame requires a lot of time and equipment, and when the frame and the member is a dissimilar metal, there is a difficult problem in welding for joining the frame. In addition, in the structure of the frame by welding, there are frequent safety accidents in which the frame is cut by vibration and fatigue load of the bicycle while driving the bicycle.

The present invention is to solve the above problems, the object is to combine the main frame of the bicycle by a standardized connecting body.

In addition, another object of the present invention is to induce the production of a standardized bicycle by reducing the manufacturing cost at the same time to simplify the manufacturing process and eliminate the cause of defects by not combining the frame by the welding process.

In addition, another object of the present invention is to increase the weight and rigidity of the bicycle body by allowing the use of environmentally friendly materials as necessary, as well as the coupling between metals of the same type and the coupling between different metals.

In addition, another object of the present invention is to be able to quickly respond to the change in the cross-sectional shape of the main frame according to the design change of the bicycle body that changes from time to time, so that the bicycle user can respond to a safe and changing bicycle design.

In order to achieve the above object, the present invention, in the main frame of the bicycle, the main frame is divided into a horizontal tube, vertical tube, inclined tube, a pair of seat stay tube, and a pair of chain stay tube, respectively One side of the horizontal tube and the inclined tube is coupled to the head tube cell, the other side of the horizontal tube and one side of the vertical tube and a pair of seat stay tube is coupled to the sheet tube cell, The other side of the vertical tube and the inclined tube and one side of the pair of chain stay tube are coupled to the bottom tube cell, and the other side of the pair of seat stay tube and the pair of chain stay tube is coupled to the dropout tube cell. , The respective tubes and cells are coupled by a press-fit process using a coupling member, the coupling member is a hollow cylindrical to form a locking jaw at the center of the outer periphery, A plurality of incision holes are formed in a predetermined length from both ends to the inner side with respect to the locking jaw, and a circular through hole is formed at the end of the incision hole, and a plurality of incision holes and a circular through hole are formed around the locking jaw. The surface between the two is characterized in that the frame coupling structure of the bicycle is provided with a plurality of jagged projections from the end to the inside.

1 is a perspective view showing a coupled state of the frame of the bicycle according to the invention.

2 is a perspective view showing a state in which the frame of the bicycle according to the present invention is separated.

3 is a view showing a coupling member for coupling the frame and the cell of the bicycle according to the invention.

4 is a view showing another coupling member for coupling the frame and the cell of the bicycle according to the invention.

100: bicycle frame 10: head tube cell

11: horizontal tube 20: sheet tube cell

21: vertical tube 30: bottom tube cell

31: oblique tube 40: dropout tube cell

41: seat stay tube 42: chain stay tube

50: coupling member 51, 61: incision hole

52, 62: circular through hole 53: serrated protrusion

54: Jam Jaw 60: Turnbuckle

63: left hand thread 64: right hand thread

65: fastener nut 66: fastener

67: Encounter

Hereinafter, the frame coupling structure of the bicycle of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a coupled state of the frame of the bicycle according to the invention, Figure 2 is a perspective view showing a separated state.

First, the present invention will be described with respect to the bicycle frame structure of the diamond shape as a conventional bicycle frame, it is applicable to the frame structure of the bicycle of various shapes.

In the bicycle frame having a diamond-shaped structure, a head tube cell 10 into which a stem and a steering wheel of the bicycle is inserted is provided, and the head tube cell 10 includes a horizontal tube 11 and an inclined tube 31. Are respectively combined.

The other side of the horizontal tube 11 and one side of the vertical tube 21 are coupled to the seat tube cell 20 into which the seatpost to which the saddle of the bicycle is connected is inserted, and one side of the pair of seat stay tubes 41. The sheet tube cells 20 are respectively coupled.

The other side of the vertical tube 21 is coupled to one side of the bottom tube cell 30 into which the drive bearing portion to which the chain sprocket is attached is inserted. In addition, the other side of the inclined tube 31 is coupled to the bottom tube cell 30, and one side of the pair of chain stay tubes 42 is coupled to each other.

In addition, a pair of seat stay tubes 41 and a pair of chain stay tubes 42 are arranged on the seat tube cell 20 and the bottom tube cell 30 from side to side with respect to the rear wheel of the bicycle. It is coupled to the supporting dropout tube cell 40.

As such, the head tube cell 10, the sheet tube cell 20, the bottom tube cell 30, and the dropout tube cell 40 have a main frame, a horizontal tube 11, a vertical tube 21, and a slope. The direction tube 31, a pair of seat stay tube 41 and a pair of chain stay tube 42 are respectively coupled. The main frame and each cell is fixed to the coupling member 50 by a press-fit process.

The coupling member 50 is applied to the coupling member having a diameter corresponding to the diameter of the frame coupled from each cell.

Referring to Figure 3, the coupling member 50, the coupling member 50 is a hollow cylindrical in the center of the outer periphery has a locking jaw 54 is formed. The latching jaw 54 allows the frame to be coupled to the cell to provide the same contact area as the boundary between the cell and the frame. Therefore, the locking step 54 is formed with a diameter larger than the inner diameter of the cell and the frame. The coupling member 50 is formed with a plurality of cutting holes 51 and circular through holes 52 at regular intervals. That is, a plurality of cutout holes 51 are formed at predetermined lengths from both end portions to the inside of the locking jaw 54, and circular through holes 52 are formed at the end portions of the cutout holes 51. Incision hole 51 is to give a coupling force to the inner surface of the frame and the cell by exerting an elastic force when the coupling member 50 is inserted into the frame or cell. The circular through hole 52 is for fixing with the fixing member in accordance with the through holes formed in the frame and the cell. That is, a through hole is formed in each frame and the cell so as to match the circular through hole 52 of the coupling member 50, and to prevent the loosening of the coupling member 50 by fixing pins or bolting or riveting penetrating through the through hole. It is for.

Further, on the surface between the plurality of cutting holes 51 and the circular through holes 52 formed around the locking jaw 54, a plurality of tooth-shaped protrusions 53 are formed from both ends to the inside. The serrated protrusion 53 is for preventing the coupling member 50 from being easily separated after being inserted into and fixed to the inside of the frame and the cell.

On the other hand, the coupling member 50 of the present invention, in Figure 4, the turnbuckle 60 may be applied. That is, each of the frames and the cells are to be combined using the turnbuckle (60). The turnbuckle 60 has a hollow cylindrical tightening nut 65 at the center thereof. The tightening nut 65 allows the frame to be coupled to the cell to provide the same contact area as the boundary between the cell and the frame. Therefore, the tightening nut 65 is formed with a diameter larger than the inner diameter of the cell and the frame. The jaws 67 are respectively coupled to both sides of the tightening nut 65. The jaw 67 has a plurality of cut holes 61 formed at a predetermined length from the end of the jaw 67 to the inside, and a circular through hole 62 is formed at the end of the cut hole 61. The cutting hole 61 exerts an elastic force when the turnbuckle 60 is inserted into the frame or the cell to provide a coupling force to the inner surface of the frame and the cell. The circular through hole 62 is for fixing with the fixing member in accordance with the through holes formed in the frame and the cell. That is, a hole is formed in each frame and the cell so as to match the circular hole 62 formed in the jaw 67, and to prevent the relaxation of the turnbuckle 60 by fixing pins or bolting or riveting penetrating through the hole. will be.

The turnbuckle 60 includes left and

right screws

63 and 64 on both sides of the tightening nut 65. That is, to allow the cell and the frame to be coupled or separated according to the rotation direction of the tightening nut 65. The fastener 66 is coupled between the outer circumference of the left screw 63 and the right screw 64 and the inside of the jaws 67. The fastener 66 is tightened while the fastening nut 65 is inserted into the inside of the cell and the frame and the fastener 66 is drawn into the inside of the jaw 67 by the rotation of the left and

right screws

63 and 64. It is to expand the (67) so that the surface of the jaws (67) can be firmly in contact with the inner surface of the cell and the frame.

The turnbuckle 60 will be applied with a turnbuckle having a diameter corresponding to the diameter of the frame coupled from each cell.

The head tube cell 10, the sheet tube cell 20, the bottom tube cell 30, and the dropout tube cell 40 may be precise in a constant mold by a die casting method, a precision casting method, a powder metallurgy method, or a gravity casting method. It is standardized and mass produced.

The horizontal tube 11, the vertical tube 21, the inclined tube 31, the pair of seat stay tubes 41 and the pair of chain stay tubes 42 are made of metal, carbon fiber, and glass fiber. The material is either synthetic resin or wood.

As described above, when the coupling member 50 is applied as the frame coupling structure of the bicycle of the present invention, the inner diameters of the

cells

10, 20, 30, and 40 and the

frames

11, 21, 31, 41, and 42 are harsher than the size. Indented to dimensional tolerances. The coupling member 50 is formed by connecting a cut hole 51 and a circular through hole 52 that provide an elastic force cut at equally divided portions at both ends, and a plurality of tooth-shaped protrusions 54 are formed.

Such a structure is to first shrink the diameter of the incision hole 51 at both ends by the tightening pressure of the hydraulic or pneumatic clamp, and then insert the coupling member 50 between the frame and the cell to which the contracted tip is to be coupled, It press-fits so that it may enter to the floor of the sawtooth-shaped protrusion 53 by a predetermined pressure.

Although not shown in the drawing using a circular through hole 52, bolted or pinched or riveted from the outer circumferential surface of each

cell

10, 20, 30, 40 and the

frame

11, 21, 31, 41, 42. Fixing was performed to restrain the play between the coupling members due to vibration.

Furthermore, in the embodiment of FIG. 4, turnbuckle 60 has been applied. The turnbuckle 60 has a circular through hole 62 connected to the incision hole 61 cut into two parts at both ends, and has a left screw 63 and a right screw 64 coupled therein, It is coupled to the tightening nut 65 to rotate the tightening nut 65 to pull the left screw 63 and the right screw 64 so that the fastener 66 opens the jaws 67 to combine the cell and the frame. Structure. The turnbuckle 60 also penetrates through the circular through hole 62 and bolts or pinches or rivets from the outer circumferential surface of the cell and the frame to restrain the play between the coupling members due to vibration.

As described above, the frame structure of the combined bicycle of the present invention is assembled as compared to the conventional working method of many processes, such as cutting, painting, processing, pressing, welding, and then finishing and painting. Due to the characteristics of the process, it is possible to quickly assemble without welding by welding, and in the color for the design of the frame to be combined with each cell at the time of assembly, various designs and paintings are possible before assembly. Stainless steel, aluminum alloy, duralumin alloy, titanium alloy, carbon fiber, glass fiber, industrial plastic tube or bamboo have a wide range of material choices to suit the purpose and application.

While the invention has been shown and described in connection with specific embodiments thereof, it is well known in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the claims. Anyone who has a can easily know.

The present invention is divided into a head tube cell, a sheet tube cell, a bottom tube cell, a drop-out tube cell by the above solution, and the horizontal tube, vertical tube, inclined tube, a pair of the main frame in the corresponding cell By combining the seat stay tube and a pair of chain stay tube as a joining member, firstly, there is no welding process and thus the safety accident of the bicycle user due to welding failure can be prevented. In addition, expensive welding equipment is not required. Third, aesthetic measures can be further improved by assembling after completing painting with various patterns before assembling the joining members. Fourth, as well as dissimilar metals, synthetic resins and various Natural materials can be utilized to create aesthetic effects by directing various designs. There are two available models combine design frames and complete bicycles in effect.

Claims

In the main frame of the bicycle,

The main frame is divided into a horizontal tube, a vertical tube, an inclined tube, a pair of seat stay tube, and a pair of chain stay tubes, respectively, and one side of the horizontal tube and the inclined tube is a head tube. Coupled to the cell, the other side of the horizontal tube and one side of the vertical tube and a pair of seat stay tube is coupled to the seat tube cell, the other side of the vertical tube and the inclined tube and a pair of chain stay tube One side is coupled to the bottom tube cell, the other side of the pair of seat stay tube and the pair of chain stay tube is coupled to the dropout tube cell,

The respective tubes and cells are coupled by a press-fit process using a coupling member, and the coupling member is a hollow cylindrical shape, forming a locking jaw at the center of the outer circumference, and having a predetermined length from both ends to the inner side with respect to the locking jaw. A plurality of incision holes are formed, and a circular through hole is formed at the end of the incision hole, and the surface between the plurality of incision holes and the circular through hole formed around the locking jaw is formed with a plurality of serrated inwards at both ends. Frame coupling structure of bicycle with protrusion.
In the main frame of the bicycle,

The main frame is divided into a horizontal tube, a vertical tube, an inclined tube, a pair of seat stay tube, and a pair of chain stay tubes, respectively, and one side of the horizontal tube and the inclined tube is a head tube. Coupled to the cell, the other side of the horizontal tube and one side of the vertical tube and a pair of seat stay tube is coupled to the seat tube cell, the other side of the vertical tube and the inclined tube and a pair of chain stay tube One side is coupled to the bottom tube cell, the other side of the pair of seat stay tube and the pair of chain stay tube is coupled to the dropout tube cell,

Each tube and the cell are coupled using a turnbuckle, the turnbuckle forms a hollow cylindrical tightening nut in the center, a jaw on both sides of the tightening nut, respectively, a plurality of predetermined lengths inward from the end of the jaw. And forming a circular through hole at the end of the incision hole, and forming left and right screws on both sides of the tightening nut, respectively, between the outer circumference of the left and right screws and the inside of the jaws. The frame coupling structure of the bicycle combined with fasteners.
The method according to claim 1 or 2, wherein the head tube cell, sheet tube cell, bottom tube cell and drop-out tube cell is produced by any one of a die casting method, precision casting method, powder metallurgy method or gravity casting method Frame structure of the old bicycle.
According to claim 1 or 2, wherein the horizontal tube, vertical tube, inclined tube, a pair of sheet stay tube and a pair of chain stay tube is any one of metal, carbon fiber, glass fiber, synthetic resin or wood Frame combination structure of bicycle made of one material.
According to claim 1 or 2, wherein the through-hole is formed in each of the frame and the cell to match the circular through hole of the coupling member, to prevent the loosening of the coupling member by fixing pins or bolting or riveting through the through hole Frame combination structure of one bicycle.