CN2195499Y

CN2195499Y - Frame of bicycle

Info

Publication number: CN2195499Y
Application number: CN 94209541
Authority: CN
Inventors: 宋桂林; 杨文树
Original assignee: TIANJIN BICYCLE FACTORY
Current assignee: TIANJIN BICYCLE FACTORY
Priority date: 1994-04-22
Filing date: 1994-04-22
Publication date: 1995-04-26
Anticipated expiration: 2004-04-22

Abstract

The utility model relates to a bicycle frame with multi-prismatic tubes. An upper tube and a lower tube in a three-legged structure at the front of the bicycle frame are made of multi-prismatic steel tubes with thin walls; the upper tube and the lower tube are directly butted and welded with a front face tube, a vertical tube and a five-way tube; the multi-prismatic steel tubes with thin walls has a plurality of shapes, such as a hexagon shape, an eight-prism shape and a ten-prism shape; in adddition, the shape of each prism edge can be a straight line shape, a concave arc shape or a convex arc shape; the lengths of adjacent prism edges can be equal or unequal. The multi-prismatic steel tubes with thin walls, which have different cross-sectional shapes are formed by different combination.

Description

Frame of bicycle

The utility model relates to bicycle, belongs to human-powered vehicle.

Bicycle is the walking-replacing tool of using always, and people are on and off duty, the trip shopping, and visiting friends and relatives all be unable to do without it, along with the raising of people's living standard, to the performance of bicycle, face shaping, the requirement of color is more and more high, not only be used to ride instead of walk, still a kind of decoration plays a part beautify life.The vehicle frame of existing bicycle, especially bicycle improves lessly, and it is circular thin-wall steel tube that the vehicle frame pipe adopts the cross section always, makes the people feel stiff, can not satisfy people and pursue novelty, magnificent, the demand of high-grade luxurious bicycle.

It is the bicycle frame structure of many prismatics pipe of making of the thin-wall steel tube of many prismatics with the cross section that the purpose of this utility model provides a kind of, make the moulding of vehicle frame novel, attractive in appearance more, and increase the multidirectional holding capacity of vehicle frame pipe, avoid stress concentration, improve rigidity of frame and intensity.

The cycle frame of many prismatics of the utility model pipe, be to make the top tube and down tube in the three-legged structure before the cycle frame with many prismatics thin-wall steel tube, the pipe of going up of many prismatics reaches pipe and front tube down, standpipe, the five-way pipe directly is welded into the preceding three-legged structure of vehicle frame, and the pipe of going up of many prismatics reaches the two ends and the circular front tube of pipe down, standpipe, the welding of five-way pipe is more convenient, and the Vee formation of the cycle frame of many prismatics pipe and the structure at other position are identical with the structure of Regular Bicycle vehicle frame.

Many prismatics thin-wall steel tube can be made multiple shape, its shape can be six prismatics, eight prismatics, ten prismatics etc., the shape of each seamed edge can be a linear, arcs of recesses, convex, the length of adjacent seamed edge can equate or not wait, by the different different many prismatics thin-wall steel tubes of various cross sectional shapes that are combined to form.Many prismatics thin-wall steel tube wall thickness everywhere is identical, so the shape of steel tube inner hole and profile adapt.

Narrate several examples of the shape in many prismatics thin-wall steel tube cross section below in conjunction with accompanying drawing.

Fig. 1 to Fig. 4 is the different cross section shape of several eight prismatic thin-wall steel tubes.

By among Fig. 1 as can be seen, positive eight double-wedge sections that the size up and down that the profile of the cross sectional shape of Fig. 1 is made up of 4 concave arc shape ribs and 4 short lines shape ribs equates.

By among Fig. 2 as can be seen, the profile of the cross sectional shape of Fig. 2 is by 4 concave arc shape ribs and be positioned at equal positive eight double-wedge sections of size up and down that four sections short circular arcs on the same circumference form.

By among Fig. 3 as can be seen the cross sectional shape of Fig. 3 form by 4 concave arc shape ribs and 4 short lines shape ribs, size is bigger up and down, flat eight double-wedge sections that side-to-side dimensions is less.

Positive eight double-wedge sections that Fig. 4 is made up of eight sections equal linear ribs.

Various many prismatics pipes all can be used for making the top tube and down tube of the preceding triangle of vehicle frame.

The advantage of the cycle frame of many prismatics of the utility model pipe is, because the top tube and down tube of vehicle frame have adopted many prismatics thin-wall steel tube, modern design, can produce multi-angle reflect, and increase the multidirectional holding capacity of vehicle frame pipe, and avoid stress concentration, improve rigidity of frame and intensity.

Concrete structure of the present utility model is provided by following examples and accompanying drawing.

Fig. 5 is many prismatics pipe bicycle man's bicycle vehicle frame figure, among the figure:

［ 1 ］ goes up pipe ［ 2 ］ pipe ［ 3 ］ front tube down

［ 4 ］ chain stay behind standpipe ［ 5 ］ five-way pipe ［ 6 ］ vehicle frame

［ 7 ］ vehicle frame rear stays

Go up among the figure pipe ［ 1 ］ and down pipe ［ 2 ］ make of many ribs pipe, and front tube ［ 3 ］, standpipe ［ 4 ］, five-way pipe ［ 5 ］ directly be welded into the preceding three-legged structure of vehicle frame, chain stay behind the vehicle frame ［ 6 ］ and vehicle frame rear stays ［ 7 ］ are identical with the structure of general vehicle frame.

The AA cross section is the cross section enlarged drawing of many prismatics pipe, and the shape of many prismatics thin-wall steel tube is eight prismatics, by it forms equal positive eight double-wedge sections of size up and down by 4 concave arc shape ribs and 4 short lines shape ribs as can be seen in the cross section.

Fig. 6 is the vehicle frame figure of many prismatics pipe bicycle woman's bicycle.Among the figure:

［ 1 ］ goes up pipe ［ 2 ］ pipe ［ 3 ］ front tube down

［ 7 ］ vehicle frame rear stays

The structure of woman's bicycle and man's bicycle is basic identical, just goes up pipe ［ 1 ］ and is welded on before the vehicle frame position on the triangle on the lower side, and its structure situation is identical with man's bicycle.

Fig. 5 is the specification digest accompanying drawing.

Claims

1, a kind of front tube that comprises, the five-way pipe, chain stay behind the vehicle frame, the cycle frame of many prismatics pipe of vehicle frame rear stays is characterized in that, the cycle frame of many prismatics pipe, be to make the top tube and down tube in the three-legged structure before the bicycle rack with many prismatics thin-wall steel tube, the upward pipe of many prismatics reaches pipe and front tube down, and standpipe, five-way pipe directly are welded into the preceding three-legged structure of vehicle frame.

2, by the cycle frame of the said many prismatics pipe of claim 1, it is characterized in that many prismatics thin-wall steel tube

Shape can be that the shape of six prismatics, eight prismatics, ten prismatics, each seamed edge can be linear, arcs of recesses, convex, the length of adjacent seamed edge can equate or is unequal.

3, by the cycle frame of the said many prismatics pipe of claim 2, it is characterized in that the shape of many prismatics thin-wall steel tube is eight prismatics, eight prismatics are by 4 concave arc shape ribs and 4 equal positive eight double-wedge sections of size up and down that short lines shape rib is formed.