Riding-seating dual-purpose bicycle with variable posture and wheel base

Abstract

The invention provides a novel bicycle, and particularly relates to a riding-seating dual-purpose bicycle, of which the wheel span and the wheel base of a front chain wheel group and a rear chain wheel group can be changed. The novel bicycle comprises the components of a group of axial cavities or a bicycle frame main beam, of which the outer wall is a track, a telescopic beam rear fork with a pull bar, a directional upright pipe with a pull bar, a sitting posture upright pipe with a pull bar, a multi-purpose bicycle hanging rack which can be used as a back rest, a fin-shaped chain wheel axisbracket, a front crank sprocket group and a rear crank sprocket group, a front travelling wheel group and a rear travelling wheel group and the like; due to mutual drawing and positioning of the pullbars arranged among the components, the angles of the directional upright pipe and the sitting posture upright pipe and the length of the telescopic beam rear fork are synchronously changed, a rider can flexibly and reliably adjust the postures from the common forward lean riding mode to the lying backward sitting mode, so that the novel bicycle is suitably used for traveling medium and short distances at a low-speed or medium and long distances at a high-speed in urban or suburban areas in the forward lean riding mode or lying backward sitting mode; and in addition the novel bicycle has the advantages of reasonable and superior ergonomics and aerodynamics, novel structure, high overall strength, advanced joints and linkages and wide adaptability.

Description

Technical field: [0001] The invention relates to a new type of bicycle, which belongs to a daily transportation and leisure travel tool, and is suitable for riding at low speeds for short and medium distances in the city and high-speed travel for medium and long distances in the suburbs. Background technique: [0002] Existing riding bicycles can only make some adaptive adjustments to the handlebars and seats according to the height of the user. The riding posture is basically fixed. Too concentrated pressure on the buttocks and arms can easily cause muscle tissue fatigue and damage, and kinetic energy transmission Low efficiency, and because of the high center of gravity, poor stability, large windward area, high drag coefficient, it is laborious and easy to lose control when riding at a relatively high speed, which increases its risk, and it is easy to cause fatigue when riding for a long time. Therefore, many products at home and abroad The designer has done a lot of rese...

AI Technical Summary

Problems solved by technology

[0002] Existing riding bicycles can only make some adaptive adjustments to the handlebars and seats according to the height of the user. The riding posture is basically fixed. Too concentrated pressure on the buttocks and arms can easily cause muscle tissue fatigue and damage, and kinetic energy transmission Low efficiency, and because of the high center of gravity, poor stability, large windward area, high drag coefficient, it is laborious and easy to lose control when riding at a relatively high speed, which increases its risk, and it is easy to cause fatigue when riding for a long time. Therefore, many products at home and abroad The designer has done a lot of research and development. Recently, a foreign (www.freshcreation.nl) website has released a variable-type dual-purpose bicycle that reasonably solves some of these problems. , (ZI200720017142.4), (ZI 200420008808.6) and other patent applications also have disadvantages such as complex structure, large vehicle body, long wheel base, poor integrity, and high manufacturing cost

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