Beam seat tube four-link folding portable bicycle
A folding and bicycle technology, which is applied to foldable bicycles, bicycles, motor vehicles, etc., can solve the problems of failing to achieve the satisfactory effect of complete folding, and achieve the effect of fast and effective folding and ensuring strength.
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[0012] according to figure 1 , figure 2 , image 3 , the four-link folding portable bicycle with beam and seat tube includes a beam 1, a front head tube 2, a front fork 3, a V-shaped folding handle 4, a front wheel 5, a rear wheel 6, a seat 7 and a driving mechanism 8;
[0013] The vehicle beam 1 includes a front beam tube 111, a rear beam tube 112, a front rotor blade 12, a first channel member 13, a second channel member 14, an L-shaped member 15, a lower link 16, and a first locking hook 17. , bottom bracket tube 18 and rear fork 19, described front beam tube 111 is a cut-off workpiece of a rectangular aluminum tube, and the rear top of described front beam tube 111 has a threaded hole, and the front end of described front beam tube 111 is connected with the The above-mentioned front rotor blade 12 is welded, and the described front rotor blade 12 is a cut piece of aluminum extruded profile with a ring shape below the top, and the rear end of the front beam tube 111 is ...
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