Longitudinally-foldable bicycle

Abstract

The invention discloses a longitudinally-foldable bicycle. The longitudinally-foldable bicycle comprises a front vertical pipe, a lower connection rod unit, a rear fork unit, a seat pipe unit, a seat pipe pull rod unit, an upper connection rod unit and clamping wrenches. The upper end of a front vertical pipe unit is connected with the upper end of the rear fork unit through the upper connection rod unit in a hinge mode. The lower end of a front vertical pipe unit is connected with the lower end of the rear fork unit through the lower connection rod unit in a hinge mode. The upper end of the seat pipe unit is connected with the seat pipe pull rod unit in a hinge mode. The bottom end of the seat pipe unit is connected with the rear fork unit in a hinge mode. The seat pipe pull rod unit and the upper connection rod unit are connected in a hinge mode and fixed through the clamping wrenches. The longitudinally-foldable bicycle is convenient to fold, and linkage shrinkage of a whole bicycle frame can be achieved only through lifting pulling movements. A key position of the bicycle frame is provided with a clamping structure, and the rigidity of the bicycle frame is good. The longitudinally-foldable bicycle is convenient to carry about, a front wheel and rear wheels are in a straight line after the bicycle is folded, the bicycle can be pushed to travel directly, following-up steering of the front wheel can be achieved, and thus the bicycle can be carried with hands conveniently. The bicycle is small in occupied space and thickness after folded.

Description

technical field [0001] The invention relates to the field of bicycles, in particular to a longitudinally foldable bicycle. Background technique [0002] In the prior art, the folding method of a folding bicycle is more common to fold the bicycle in half along a rotating hinge shaft at a certain position in the middle of the frame. The usual problems of folding bicycles in this folding method mainly include: [0003] 1. Folding is not convenient enough. Since the whole vehicle is folded in half along the middle part of the frame, during the folding process, the operator is at the middle position of the frame at first. As the folding process progresses, the operator will gradually move away from the original middle position, resulting in The overall control of the car body is more difficult; in addition, in order to ensure a more regular shape and better firmness of the car body after folding, more complicated folding steps are usually required; [0004] 2. It is not convenie...

AI Technical Summary

Problems solved by technology

[0003] 1. The folding is not convenient enough. Since the whole vehicle is folded in half along the middle part of the frame, the operator is at the middle position of the frame during the folding process. As the folding process progresses, the operator will gradually move away from the original middle position, resulting in The overall control of the car body is more difficult; in addition, in order to ensure a more regular shape and better firmness of the car body after folding, more complicated folding steps are usually required;

[0004] 2. It is not convenient to carry after folding. Bicycles with a half-fold structure usually have a large width and irregular shape after folding, and it is inconvenient to carry them by hand. In addition, due to the limitation of the half-fold structure, it is generally difficult to carry out after folding;

[0005] 3. After folding, the volume is large and the shape is irregular, and the adaptability to crowded places such as public transportation such as buses and subways is low;

[0006] At present, there are some designs of miniature folding bicycles with small wheel diameters on the international and domestic markets, but there is no comprehensive solution for the firmness of the body, the comfort of riding, the convenience of folding and the convenience of carrying around after folding.

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