CN2125542U

CN2125542U - Improved structure of bicycle frame connection

Info

Publication number: CN2125542U
Application number: CN 92207524
Authority: CN
Inventors: 杨茂基
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-04-22
Filing date: 1992-04-22
Publication date: 1992-12-23

Abstract

The utility model relates to an improved structure of bicycle frame connection, mainly comprising a bicycle tee pipe whose waist side is provided with a joint, and the circumference of the joint is convexly provided with a plurality of flanges which are parallel to an axial direction in equal distance. An outer flat groove is between two contiguous flanges, the joint is sheathed with a jacket tube, the inner tube diameter is dented with a plurality of grooves which are parallel to the axial direction in equal distance, and a flange is between two contiguous grooves. When the utility model is assembled, a layer of contact agent is smeared at the connecting part of the joint, making the flanges and an inner flange parallel collinear flange clamp mutually, the contact agent is smeared at a connecting part compression tube wall and the concave point of a compression tube diameter, strength fiber is coated in the axial direction then to be heated, and the connection structure can be completed.

Description

Improved structure of bicycle frame connection

The utility model belongs to the structure of bicycle parts, is used for the connection of bicycle frame, refers to a kind of improvement structure that applies to the connection of bicycle frame dual combination especially.

Because standard of living improves day by day, bicycle has become the vehicle of people's indispensability, also is the instrument that people are commonly used to body building in recent years.The spider of general bicycle all is to be connected and fixed with welding manner, and it is basic framework that at present most producer has all changed the aluminium of adopting light weight, with welding manner each component composition is become the vehicle body framework again, and following shortcoming is arranged:

1. the heat efficiency of aluminium is splendid, imitates cure process in its processing is preceding, all goes to pot after processing.

2. when aluminium welded, its welding scope crystalline particle became big (chap), and lattice dilatation easily produces the embrittlement phenomenon, causes intensity to reduce a lot.

3. the thermal expansion coefficient of aluminium and solidification shrinkage degree are big than the steel person, and (steel is 12.2 * 10 to be about 2 times of steel ^-6Mm/mmgrd, aluminium are 23.8 * 10 ^-6Mm/mmgrd), thus the welding after often have high within stress exist on the weld nugget, when suffering external force collision, be easy to generate disrumpent feelings danger.

As from the foregoing, aluminum pipe the time produces great stress concentration shortcoming in welding, has gone on foot the global function kenel in the development of bicycle now, and the strength demand of its vehicle body framework is higher, can overcome concavo-convex road surface and powerful detrimental stress problem that difficult landform caused.

Design goal of the present utility model provides a kind of do not have stress concentration, the dual joint construction of intensity bicycle frame bigger, that weight is lighter, to reach the bigger use effect of bicycle frame intensity.

A kind of bicycle frame of the utility model connects the improvement structure, mainly comprise a bicycle three-way pipe, the waist side of this three-way pipe is established a joint, this joint circumference equal intervals is convexly equipped with the axial flange of plurality of parallel, respectively be provided with outer rising as high as the banks between adjacent two flanges, sheathed sleeve pipe on joint in addition, in it caliber equal intervals be arranged with several parallel shafts to groove, be a flange between adjacent two grooves:

Connecting portion at joint during combination applies one deck contact agent, again sleeve pipe is placed in rotation one angle on the joint, make the parallel conllinear of flange with inward flange get final product the structure that engages mutually of a flange, and utilize oil pressure pressurization tube wall with four pipe moulds at connecting portion, make drawing position leak-tight joint more, at last at pressurization caliber recess coat contact agent, clad composite material reinforcing fiber again, according to parallel shafts to coating, move in the pot arch again and heated, temperature reaches 130 °, heats two hours, can connect and finish.

Now lift a preferred embodiment and cooperate the graphic back that is illustrated in:

See also shown in Figure 1, a kind of bicycle frame of the utility model connects the improvement structure, comprise a bicycle three-way pipe (10), its waist side horizontal direction is convexly equipped with a joint (11), this joint (11) front end is divided into socket part (111) and connecting portion (112) two parts, wherein socket part (111) thickness of pipe is thinner, and in the first-class distance of its front end circumference be convexly equipped with six be parallel shafts to oblong flange (113), rear end, its socket part (111) is smooth pipe (114); At joint (11) left side of three-way pipe (10) sheathed sleeve pipe (12), within sleeve pipe (12) right side the caliber equal intervals be arranged with six parallel shafts to rectangular recess (121), respectively be provided with inward flange (122) between these adjacent two grooves (121) and (121 ') with groove width such as (121), it is relative with joint (11) part and establish that this sleeve pipe (12) front end also is divided into socket part and connecting portion, know that by Fig. 1 be A by center-point to the length on flange (111) summit, and center-point is B to the length of smooth pipe (114), it is A to the length of groove that corresponding sleeve pipe (12) is gone up by center-point, and center-point is B to the length of inward flange (122), and coincide mutually; When joint (11) makes up with sleeve pipe (12), earlier joint (11) portion is applied one deck contact agent, again sleeve pipe (12) is sleeved on the joint (11), as shown in Figure 2, can obtain a joint construction that fits like a glove, make flange (113) alignment cavities (121) and smooth pipe (114) align the cooperation of inward flange (122), behind joint (11) insertion sleeve pipe (12), again with sleeve pipe (12) rotation one angle, make flange (113) parallel with inward flange (122), can obtain one borrows joint construction that flange holds mutually as shown in Figure 2, side is utilized oil press pressurization tube wall with four pipe moulds outside the last connecting portion, make junction leak-tight joint more, other positions of bicycle spider also can connect in the manner described above.

After combination is finished, will cause the even depression of fraction at the connecting portion of pipe mould pressurization, as shown in Figure 3, apply one deck contact agent and clad composite material reinforcing fiber at this connecting bridge again, can select carbon fiber or glass fibre according to circumstances for use, earlier above-mentioned reinforcing fiber is applied one deck resin and be called the preimpregnation material, but this resin can be the heat thermosetting resin or is thermoplastic resin, this composite material reinforcing fiber according to horizontal axis coat to the caliber uniform thickness till as shown in Figure 3, again whole car is moved to add and pine for 130 ° of heating of temperature after two hours, can obtain one fully without welding manner, only depend on the chassis structure of above-mentioned connection mode joint.

In sum, this creation improved structure of bicycle frame connection, its shape and structure is characterised in that: (1) is borrowed the holding design of flange and inward flange and can be interconnected; (2) its joint is the concentrated place of stress, if this then can select the bigger material of intensity, the cover head part then can be selected the material of light weight, avoids the limited shortcoming of one-body molded material; (3) the coupling part cladding is laminated with the effect that material not only provides the secondary connection, also can remedy the depression shortcoming of pipe mould pressurization. This structure not only can be resisted powerful impact, and can shorten into The type time.

Marginal data is as follows

Fig. 1 is the exploded perspective view of the utility model preferred embodiment.

Fig. 2 is the combination view of the utility model preferred embodiment.

Fig. 3 is that figure is finished in the combination of the utility model preferred embodiment.

10 three-way pipes, 11 joints

111 socket parts, 112 connecting portions

113 oblong flanges, 114 smooth pipes

12 sleeve pipes, 122 inward flanges

121 grooves

Claims

1, a kind of bicycle frame connects the improvement structure, mainly comprise a bicycle three-way pipe, it is characterized in that: the waist side of three-way pipe is established a joint and a sleeve pipe, this joint circumference equal intervals is convexly equipped with the axial flange of plurality of parallel, between adjacent two flanges outer rising as high as the banks, a sheathed sleeve pipe on joint in addition, in it caliber equal intervals be arranged with several parallel shafts to groove, be a flange between adjacent two grooves, during combination on joint connecting portion apply one deck contact agent, the parallel conllinear with inward flange of flange is engaged mutually, and utilize oil pressure pressurization tube wall with four pipe moulds, make its leak-tight joint more at connecting portion, apply one deck contact agent at pressurization caliber recess at last, again with parallel shafts to the clad composite material reinforcing fiber, heated 130 ° of temperature two hours.