(EN) The invention provides a multifunctional four-wheel deformable bicycle which comprises a bicycle frame, two front wheels, two rear wheels, a loading base, a steering mechanism, a braking mechanism, a pedal device, a chain transmission mechanism and a seat cushion. The bicycle is characterized in that the bicycle frame comprises a bicycle frame front sleeve, a bicycle frame middle rod, a bicycle frame rear sleeve, a bicycle frame rear carriage, a bicycle frame inclined connecting pipe and a bicycle frame cross connecting pipe; the part of the bicycle frame middle rod, located in front of the bicycle frame rear sleeve, just retracts in the bicycle frame front sleeve; the plane of the loading base is provided with an embedded hidden removable flatly stacked fence; the bottom of the loading base is provided with a shock reducer; the steering mechanism comprises a horizontally connected cross rod and left and right two independent handle bars; the lower end of the upper handle bar is inserted in the upper end of the lower handle bar and is axially connected with the lower handle bar; the upper handle bar is movably connected with a rear edge connecting rod of the loading base; and the two ends of the horizontally connected cross rod are respectively axially connected to front ends of the front extending bars of the left and right two handle bars. The bicycle has the advantages that the structure is simple, manpower is saved during operation, the telescopic distance of the bicycle frame is large and the handle bars are foldable and retractable, the overall bicycle can be changed into a baby carriage and a shopping trolley.
(ZH)
本发明一种多功能四轮变形自行车，包括车架、两个前轮、两个后轮、载重基座、转向机构、制动机构、脚踏装置、链传动机构和座垫，特点是车架包括车架前套管、车架中杆、车架后套管、车架后支撑架、车架斜连管及车架横连管，车架中杆处于车架后套管前的部分刚好缩入车架前套管中，载重基座平面内设置嵌隐式拆装平叠栅栏，其底部设置有减震装置，转向机构包括水平连接横杆和各自独立的左、右两个把杆，上把杆的下端插接在下把杆的上端中且相互轴接，上把杆与载重基座的后沿连接杆活动连接，水平连接横杆的两端分别轴接在左、右两个把杆前延杆前端，优点是结构简单、操作省力、车架伸缩距离大并且把杆可折缩，整车可转变为童婴手推车、购物车。
