CN2272861Y

CN2272861Y - Four-rod folding frame for bicycle

Info

Publication number: CN2272861Y
Application number: CN 96205632
Authority: CN
Inventors: 卜庆国
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-16
Filing date: 1996-02-16
Publication date: 1998-01-21
Anticipated expiration: 2006-02-16

Abstract

The utility model relates to a four-rod folding frame for bicycles, which is characterized in that a main body of a bicycle frame is formed in the way that every two of four rods A, B, C and D are mutually hinged, wherein the four hinge points has the separation distances that a b = c d, and a c = b d; the rod A forms a hollow barrel shape, and the rod B forms a fork shape. The utility model has the advantages that the structure is simple, and the distance between a front and a rear wheels and the height of a seat can be freely adjusted. The utility model is suitable for bicyclists with different ages and heights to ride the bicycles.

Description

Four-rod folding frame for bicycle

The utility model belongs to a kind of cycle frame.

The vehicle frame of ordinary bicycle is fixed, and can not fold after the installation, and the vehicle frame that some can folding of bicycle, and folding fixed form is very complicated again, and wheelspan and seat is high fixes again.

The purpose of this utility model be will to people introduce a kind of simple in structure, can be according to suitable adjusting knurl distance of operating needs and the high vehicle frame of seat.

The principle of this vehicle frame is: utilize the parallelogram four-bar mechanism as main body of vehicle frame, four bar A, B, C, D are hinged in twos, a bar A in four bars is an empty tube shape, for the installation front fork, and bar B is forked, for trailing wheel is installed, axis is installed on the bar C, and the e of the bar E of installation vehicle seat is point articulated on bar B, and other end f point and bar D are hinged to the extended end of b point direction from the d point, and hinged back constitutes triangle and fixes.During use, regulate the angle of any two two bars that are hinged, i.e. the spacing of scalable two wheels and the height of vehicle seat.

Advantage of the present utility model is: 1, all be rod member is hinged, and folding convenient fixing, reliable.But 2, wheelspan and the high regulated at will of seat, the people of being convenient to all ages and classes section or different heights uses.3, occupation of land is little, is convenient to deposit.

It is for reference to introduce several embodiment below:

Embodiment 1 is as Fig. 1.A, B, C, D four bars are formed the parallelogram four-bar mechanism, bar A is parallel to bar D, bar B is parallel to bar C, bar A and bar B, C are articulated in a, c 2 points respectively, bar D and bar B, C are articulated in b, d 2 points respectively, ab=cd, ac=bd, bar A is an empty tube shape, for front fork is installed, bar B prolongs to the b direction from a point, is forked at extended end, for trailing wheel is installed, axis can be installed in d point place, the e of the bar E of installation vehicle seat is point articulated on bar B, and other end f point and bar D are hinged to the extended end of b point direction from the d point, and it is stable to constitute the efb triangle.Bar E also can remove need not, four hinge-points are fastening, and vehicle frame is promptly stable.

Embodiment 2 is as Fig. 2.Its difference from Example 1 is that the position with bar B and bar C exchanges, and during use, axis can be installed on bar B or the bar D.

Embodiment 3 is as Fig. 3.A, B, C, D four bars are formed the parallelogram four-bar mechanism, bar A is parallel to bar D, bar B is parallel to bar C, bar A and bar B, C are articulated in a, c 2 points respectively, bar D and bar B, C are articulated in b, d 2 points respectively, ab=cd, ac=bd, bar A is an empty tube shape, for front fork is installed, bar D prolongs to d point direction from the b point, is articulated in the f point at extended end with the bar E that vehicle seat is installed, other end e is point articulated on bar C, form triangle efd, constitute the stable of whole parallelogram, bar B, D are forked at hinge-point b end respectively, for trailing wheel is installed, axis can be installed on the bar B.

Fig. 1 is the utility model first embodiment schematic diagram.

Fig. 2 is the utility model second embodiment schematic diagram.

Fig. 3 is the utility model the 3rd embodiment schematic diagram.

A, car fork standpipe among the figure; B, frame beam; C, vehicle frame girder; D, vehicle seat column fine strain of millet; E, vehicle seat support beam.

Claims

1, four-rod folding frame for bicycle is characterized in that: the main body of vehicle frame is hinged in twos by four bar A, B, C, D and constitutes, and four hinge-point spacings are ab=cd, ac=bd, and bar A is an empty tube shape, and bar B is forked.

2, four-rod folding frame for bicycle according to claim 1 is characterized in that: bar A is parallel to bar D, bar B is parallel to bar C, and bar A and bar B, C are articulated in a, c 2 points respectively, and bar D and bar B, C are articulated in b, d 2 points respectively.

3, four-rod folding frame for bicycle according to claim 1 is characterized in that: bar A is parallel to bar D, bar B is parallel to bar C, and bar A and bar B, C are articulated in a, c 2 points respectively, and bar D and bar B, C are articulated in b, d 2 points respectively, and bar D is forked.