CN2310003Y

CN2310003Y - Joint for foldable bicycle

Info

Publication number: CN2310003Y
Application number: CN 97240688
Authority: CN
Inventors: 韩德玮
Original assignee: MEIDAHANG MECHANISM CO Ltd GUANGZHOU
Priority date: 1997-09-12
Filing date: 1997-09-12
Publication date: 1999-03-10
Anticipated expiration: 2007-09-12

Abstract

The utility model relates to a joint for folding bicycles; two butted circular or elliptical pipe fitting end parts are gradually transited into polygons which are welded with joint plates similar shapes; two sides from two joint plates are hinged; the bicycle joint of which circular tube end is transited into a polygon increases the bending strength at tube ends, saves the reinforcing rids at the tube ends of the common joint for folding bicycles, and ensures strength, with beautiful appearance.

Description

A kind of folding bicycle joint

The utility model relates to the folding bicycle joint.

The vehicle frame of folding bicycle generally adopts pipe or oval tube, and the pipe end welding of two sections collapsible butt joints is perpendicular to the adapter plate of pipe, and one side of two adapter plates is with straight hinged.Behind round the vehicle frame pipe and dull and stereotyped weld together, often the bending strength deficiency need to reach required stiffness, then have been destroyed the attractive in appearance of joint but weld gusset outside the pipe end managing and plate joint welding polylith reinforcement gusset, has also increased cost.

The purpose of the utility model is to provide a kind ofly not only to guarantee strength of joint but also guarantee folding bicycle joint attractive in appearance.

Folding bicycle joint described in the utility model has two sections pipe fittings that can dock, each pipe fitting end welded joint plate, one side of two adapter plates is hinged, and the termination portion of round or oval pipe fitting transition gradually is a polygon, polygon adapter plate and the pipe end weld together similar to the polygon pipe end.

Described folding bicycle joint, because the pipe fitting end transition is a polygon, the effect of strengthening gusset, profile uniqueness have been played in its edges and corners.Adapter plate shape and pipe end are close in addition, and both weld togethers are equivalent to reinforce the slab frame at pipe end, then can make full use of the intensity of adapter plate, and the reinforced rib project sound that described joint is not managed sidewall is attractive in appearance, can guarantee strength of joint again.

Fig. 1 is the schematic perspective view of conventional folding joint;

Fig. 2 is the schematic perspective view of triangle three-dimensional adapter;

Fig. 3 is the schematic perspective view of quadrangle three-dimensional adapter.

Embodiment one:

The folding joint of routine shown in Figure 1, pipe fitting 1 are after circle is welded with adapter plate 2, to need reinforced rib 3 reinforcement.Pipe fitting 1 end transition of the present utility model is a triangle, as shown in Figure 2.With adapter plate 2 welding of triangle, two adapter plates 2 are hinged into folding joint.

But should point out pipe fitting 1 end also transition be quadrangle or pentagon, the scheme drawing of quadrangle three-dimensional adapter shown in the accompanying drawing 3.

Claims

1, a kind of folding bicycle joint, two sections pipe fittings (1) that can dock are arranged, each pipe fitting (1) end welded joint plate (2), one side of two adapter plates (2) is hinged, it is characterized in that: the termination portion of round or oval pipe fitting (1) transition gradually is a polygon, polygon adapter plate (2) similar to polygonal pipe end and pipe (1) end weld together.

2, by the described folding bicycle joint of claim 1, it is characterized in that: the polygon of pipe fitting (1) end is triangle or quadrangle or pentagon.