Portable telescopic folding bicycle

Abstract

The invention relates to a portable telescopic folding bicycle. A frame is formed into a telescopic oscillating guide-bar mechanism type folding frame of pivot linkage by a connecting form similar to an umbrella skeleton, and thereby pipe fittings of the frame can be rapidly shortened by about half the size, and the front wheel and the rear wheel are placed together in parallel after the frame is folded. The folding bicycle reduces a frame connecting rod, thereby reducing the size and the dimensions of the bicycle body, reducing the weight of the bicycle body, facilitating carrying the bicycle, and regulating the riding height of the bicycle body according to requirements to facilitate the use by people of different heights and ages; the light miniaturized bicycle body saves raw materials and the cost; the transmission ratio is increased by a multiplying gear configured on the bicycle, thereby enabling minor-diameter wheels used by the bicycle to reach the running speed of big wheels; handle bars and foot pedals can be folded, the folding dimension of the bicycle is about 60*20*10 cm, and the weight is about 5kg, therefore, the bicycle can be carried in a hand bag or a packsack.

Description

technical field [0001] The invention relates to a bicycle, in particular to a portable telescopic folding bicycle, which can be folded into the size of a handbag and is convenient to be carried by hand. technical background [0002] At present, there are many types of folding bicycles on the market, but the folding forms are similar. Most of them adopt the pivoting folding method that the crossbeam connecting the bicycle frame to the front fork riser and the support riser is set to be opened with a quick release wrench. The frame and the front and rear wheels can be folded together. Most of the wheel diameters of this folding bicycle are about 20 inches. Since the body is folded, the volume does not decrease and the weight is not light, so it is still inconvenient to carry. [0003] Chinese invention patent application 200510073039.7 has announced a portable folding bicycle, the front and rear tube assemblies it has are telescopic tube structures, and the upper ends of the ...

AI Technical Summary

Problems solved by technology

Due to the high position of the upper casing pivot connection points of the front and rear tube assemblies and the connecting rod connecting the support tube, the design of the folding bike makes it difficult for ladies wearing skirts to ride, and the moment is increased. The multi-point connection of the folding rod of the rear tube assembly causes the car to feel a large radial disturbance during practical riding; because the design of the front and rear telescopic components is based on a fixed size lock, the height of the car cannot be adjusted to suit people of different heights use, only folding bikes of different heights can be produced for the market to choose, resulting in an increase in the cost of production molds

The car uses a two-stage chain drive, but due to the constraints of the space between the folded front and rear tubes, the driving device cannot be made large, and the transmission ratio is not high, resulting in low speed, so it is easy to consume too much energy when riding. Suitable for longer distance riding

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