CN204473013U - Four-bar linkage folds the portable tricycle of forerunner's dynamic formula - Google Patents

Abstract

A kind of four-bar linkage folds the portable tricycle of forerunner's dynamic formula, comprise four-bar linkage folded bicycle beam, front head tube, seat pipe, saddle, locator card, front fork, rear linkage rack, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, four-bar linkage folded bicycle beam is by foldable base, front-axle beam pipe, back rest pipe, rotating vane, flute profile folded piece, thick-walled tube, car beam latch hook and connecting rod are formed by connecting, four-bar linkage folded bicycle beam is welded in front head tube and seat pipe, seat pipe is upper connects rear linkage rack, rear linkage rack connects two trailing wheels, rear linkage rack connects part by left, right even part, cast saddle, revolver bar, rightly take turns bar, left strut, right strut, latch hook member, interlocking sheet, strong magnet and suction buckle are formed, front fork is connected with front head tube, the connection front-wheel of front fork and driver train, saddle install is managed in seat, V-shaped folding hand handle is connected with front fork, driver train comprises axis, crank, chain wheel, pedal, flywheel and chain.

Description

Four-bar linkage folds the portable tricycle of forerunner's dynamic formula

technical field:

The utility model relates to a kind of folding portable type tricycle, and particularly a kind of four-bar linkage folds the portable tricycle of forerunner's dynamic formula.

technical background:

The folding tricycle that the design people formerly designs, although can fold, due to the reason such as structure and structure, also fail to reach folding after can be less promising result.

utility model content:

The purpose of this utility model to provide a kind of car beam to be that four-bar linkage folds and rear linkage rack can strut or draw in as umbrella---four-bar linkage folds the portable tricycle of forerunner's dynamic formula.The purpose of this utility model realizes like this, four-bar linkage folds the portable tricycle of forerunner's dynamic formula, comprise four-bar linkage folded bicycle beam, front head tube, seat pipe, saddle, locator card, front fork, rear linkage rack, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, it is characterized in that: four-bar linkage folded bicycle beam comprises foldable base, front-axle beam pipe, back rest pipe, rotating vane, flute profile folded piece, thick-walled tube, car beam latch hook and connecting rod, foldable base is opening flute profile stamping backwards, the upper and lower of foldable base flute profile both sides respectively has one mutual to perforation, foldable base is welded in the rear side of front head tube bottom, the front end welding rotating vane of front-axle beam pipe, the below welding thick-walled tube of the rear end of front-axle beam pipe, in the pore of front-axle beam pipe rear end, car beam latch hook and torsion spring are also installed, the rotating vane being welded in front-axle beam pipe is by lock bolt and mutual being rotationally connected perforation in foldable base top, back rest pipe rear end welding base pipe, the front end welding flute profile folded piece of back rest pipe, flute profile folded piece is the flute profile stamping that Open Side Down, the front and rear of flute profile folded piece both sides respectively has one mutual to perforation, flute profile folded piece anterior mutual to perforation by being rotationally connected lock bolt and thick-walled tube, foldable base bottom mutual to perforation by enclosing be rotationally connected before lock bolt and connecting rod, connecting rod is that the two ends of the Metallic rod of a flat strip shaped respectively connect a circle, the rear circle of connecting rod is by lock bolt and mutual being rotationally connected perforation in flute profile folded piece rear portion, car beam latch hook in the pore of front-axle beam pipe rear end is under the effect of torsion spring, the top margin of flute profile folded piece front end can be pinned, locator card is connected to the top at front-axle beam pipe rear portion, locator card is the Plastic Parts of a band C shape bayonet socket, head tube before locator card can fasten after four-bar linkage folded bicycle beam is folding, seat pipe is upper connects rear linkage rack, rear linkage rack comprises left even part, right even part, cast saddle, revolver bar, rightly take turns bar, left strut, right strut, latch hook member, interlocking sheet, strong magnet and suction buckle, left even part and the right part that connects divide left and right to be welded in the rear side of a pipe, cast saddle is slidably connected on a pipe, interlocking sheet is fixed on a front side for pipe lower end, revolver bar and right upper end of taking turns bar are rotationally connected with left even part and right even part respectively, revolver bar and right top of taking turns bar are rotationally connected the rear end of left strut and right strut respectively, the front end of left strut and right strut is connected on cast saddle, revolver bar and right lower end of taking turns bar hold installation two trailing wheel respectively, cast saddle is twisted and connects strong magnet, rear side in the middle part of present pipe is also twisted and is connect a suction buckle, revolver bar and right take turns bar mutually draw in time, strong magnet holds suction buckle, and by revolver bar with rightly take turns the state that bar draws in mutually and fix, latch hook member is installed on the front of cast saddle, latch hook member can with interlocking sheet interlocking, front fork is welded by front fork tube, Five-way tube, revolver forks piece and right forks piece of taking turns, and front fork tube is rotationally connected by seven bowls and front head tube, and revolver forks piece is connected front-wheel with right lower end of taking turns forks piece, and saddle install is in the top of seat pipe, V-shaped folding hand handle is quick interlocking formula V-shaped folding hand handle, comprise hand pedestal, left hand handle, right handgrip, left lock-connecting piece, right lock-connecting piece, hand is made up of pedestal pedestal moulding and interior poling, interior poling injection moulding is in pedestal moulding, the right and left of pedestal moulding has groove, the right and left top of pedestal moulding is U-lag, bottom is flat-bottom slot, the both sides of pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, hand coordinates pedestal with bowl-type pad by interior poling, hanging bolt and slope nut, be fixedly connected in the front fork tube of front fork, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the plagiocephaly barrel of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a plagiocephaly barrel, one round head bolt and a nut are formed, twist in plagiocephaly barrel and connect round head bolt, the stubborn place of connecing of round head bolt and plagiocephaly barrel also twists and connects a nut, the channel of the right lock-connecting piece of lower weld of right handgrip, right lock-connecting piece is by channel, latch hook, to connecting bolt, spring and dowel bolt are formed, the both sides up and down of the flute profile left part of channel have mutual to perforation, a tapped bore is had in the middle part of the flute profile of channel, the upper and lower both sides of channel mutual to perforation by being rotationally connected the collar aperture in the middle part of connecting bolt and latch hook, latch hook is that left end becomes hook-type, there is collar aperture at middle part, the parts of right part band handle, the handle of latch hook there is an elongated hole, spring is positioned between the tapped bore of channel and the elongated hole of latch hook, penetrate with dowel bolt in the elongated hole of latch hook with in spring, be screwed into again in the tapped bore of channel, the cast of left hand handle and the cast of right handgrip, by two to lock bolt, be rotationally connected with respectively pedestal moulding the right and left mutual to perforation, the latch hook of right lock-connecting piece under the action of the spring, hook the round head bolt of left lock-connecting piece and realize interlocking, driver train comprises axis, crank, chain wheel, pedal, flywheel and chain, axis is rotationally connected with in five-way by axis accessory, two cranks are fixedly connected on two of axis, chain wheel is fixed on right crank, two pedals are connected to two cranks, flywheel is connected to the right side of front-wheel, and chain is wire-wrapped in chain wheel and flywheel.

The beneficial effects of the utility model are: the utility model adopts car beam to be four-bar linkage folded bicycle beam, four-bar linkage folded bicycle beam, front head tube and seat pipe fast folding and rapid deployment can be made, the folding mode of linkage rack after the utility model adopts, make rear linkage rack to launch as umbrella or to draw in, rear linkage rack can not only be carried out launching or folding soon but also effectively; Coordinate quick interlocking formula V-shaped folding hand handle again, smaller and more exquisite after making of the present utility model folding, achieve three-wheel vehicle and also can realize less folding, owing to have employed the folding mode of rear linkage rack, two trailing wheels after the utility model is launched become splayed, these two trailing wheel actual pitch also allowing the utility model land are larger, can more effectively anti-rollover.

accompanying drawing illustrates:

Fig. 1 is the utility model structural representation

Fig. 2 is the constructional drawing of the utility model four-bar linkage folded bicycle beam

Fig. 3 is linkage rack organigram after the utility model

Fig. 4 is that the utility model hand is the organigram of pedestal

Fig. 5 is the constructional drawing of the left lock-connecting piece of the utility model and right lock-connecting piece

Fig. 6 is the utility model folding process schematic diagram

Fig. 7 is that the utility model folds complete figure

In figure: 1---four-bar linkage folded bicycle beam, 2---front head tube, 31---seat pipe, 32---saddle, 33---locator card, 4---front fork, 5---rear linkage rack, 6---V-shaped folding hand handle, 7---front-wheel, 8---trailing wheel, 9---driver train; Wherein four-bar linkage folded bicycle beam 1 also comprises: 11---front foldable base, and 12---front-axle beam pipe, 13---back rest pipe, 14---rotating vane, 15---flute profile folded piece, 16---thick-walled tube, 17---car beam latch hook, 18---connecting rod; Rear linkage rack 5 also comprises: 511---left even part, and 512---right even part, 52---cast saddle, 53---revolver bar, 54---right take turns bar, 55---left strut, 56---right strut, 57---latch hook member, 58---interlocking sheet, 591---strong magnet, 592---suction buckle; V-shaped folding hand also comprises 6: 61---hand pedestal, 62---left hand handle, 63---right handgrip, 64---left lock-connecting piece, 65---right lock-connecting piece; Left lock-connecting piece 64 also comprises: 641---plagiocephaly barrel, and 642---round head bolt, 643---nut; Right lock-connecting piece 65 also comprises: 651---channel, and 652---latch hook, 653---to connecting bolt, 654---spring, 655---dowel bolt; Driver train 9 also comprises: 91---left bent axle, and 92---right bent axle, 92---chain wheel, 94---treadle, 95---step, 96---flywheel, 97---chain.

detailed description of the invention:

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, described four-bar linkage folds the portable tricycle of forerunner's dynamic formula, comprise six link rod folded bicycle beams 1, front head tube 2, seat pipe 31, saddle 32, locator card 33, front fork 4, rear linkage rack 5, V-shaped folding hand 6, front-wheel 7, trailing wheel 8 and driver train 9;

Described four-bar linkage folded bicycle beam 1 comprises foldable base 11, front-axle beam pipe 12, back rest pipe 13, rotating vane 14, flute profile folded piece 15, thick-walled tube 16, car beam latch hook 17 and connecting rod 18, described foldable base 11 is opening flute profile stampings backwards, the upper and lower of described front foldable base 11 flute profile both sides respectively has one mutual to perforation, described front foldable base 11 is welded in the rear side of front head tube 2 bottom, described front-axle beam pipe 12 is rectangular tubes, the front end welding rotating vane 14 of described front-axle beam pipe 12, described rotating vane 14 is sheet components of upper end band cast, the below welding thick-walled tube 16 of the rear end of described front-axle beam pipe 12, the described thick-walled tube 16 welded with described front-axle beam pipe 12 is transversely arranged, go back close-fitting in the pore of described front-axle beam pipe 12 rear end and be socketed one section of rectangular tube as reinforcement, the left and right sides of described front-axle beam pipe 12 rear end, inconjunction with socket wherein one section of rectangular tube has one mutual to perforation together, the top of described front-axle beam pipe 12 rear end, inconjunction with socket wherein one section of rectangular tube has an elongated hole together, described car beam latch hook 17 is bottoms is cast, top is the sliced pieces of the Al squeezing material of hook-type, the middle part of described car beam latch hook 17 becomes rod, one of the cast of described car beam latch hook 17 is penetrated from the top down in described front-axle beam pipe 12 elongated hole, and by the cast of described car beam latch hook 17 correspond to described front-axle beam pipe 12 mutual to perforation, put into torsion spring again, make torsion spring lower tube wall pushed down in one section of rectangular tube pore, one of torsion spring is made to push down on described car beam latch hook 17 rod, again with to lock bolt penetrate described front-axle beam pipe 12 mutual to perforation in, in torsion spring collar aperture and in the collar aperture of described car beam latch hook 17 cast, and to stubborn location, be welded in the cast of the described rotating vane 14 of described front-axle beam pipe 12, by to lock bolt and mutual being rotationally connected perforation in described foldable base 11 top, the top at described front-axle beam pipe 12 rear portion also has a tapped bore, described locator card 33 is one with the Plastic Parts of C shape bayonet socket, the centre of described locator card 33 has to twist and connects hole, the stubborn of described locator card 33 connects the tapped bore that hole corresponds to described front-axle beam pipe 12 rear portion, and by bolt, described locator card 33 is connected to the top at the rear portion of described front-axle beam pipe 12, the C shape bayonet socket of the described locator card 33 after being connected with described front-axle beam pipe 12 tapped bore, the top of the described front head tube 2 after folding corresponding to described four-bar linkage folded bicycle beam 1, and the C shape bayonet socket of described locator card 33 can with described before head tube 2 engage.

Described back rest pipe 13 is rectangular tubes, the rear end of described back rest pipe 13 is welded in the top of a pipe 31, the welding flute profile folded piece 15 of the front end of described back rest pipe 13, described flute profile folded piece 15 is flute profile stampings that Open Side Down, the front and rear of described flute profile folded piece 15 both sides respectively has one mutual to perforation, described flute profile folded piece 15 anterior mutual to perforation by being rotationally connected lock bolt and described thick-walled tube 16, described foldable base 11 bottom mutual to perforation by enclosing be rotationally connected before lock bolt and connecting rod 18, described front rod 18 is that the two ends of the Metallic rod of a flat strip shaped respectively connect a circle, the rear circle of described front rod 18 is by lock bolt and mutual being rotationally connected perforation in described flute profile folded piece 15 rear portion, described car beam latch hook 17 in the pore of described front-axle beam pipe 12 rear end is under the effect of torsion spring, the top margin of described flute profile folded piece 15 front end can be pinned.

Described seat pipe 31 is made up of pipe and pipe clamp, the top socket pipe clamp of described seat pipe 31 pipe, there is a tapped bore front side of described seat pipe 31 pipe lower end, rear side in the middle part of described seat pipe 31 pipe has a tapped bore, and the rear side on described seat pipe 31 pipe top divides left and right to weld the left of rear linkage rack 5 respectively and connects part 511 and right even part 512.

Described rear linkage rack 5 comprises left even part 511, right even part 512, cast saddle 52, revolver bar 53, rightly take turns bar 54, left strut 55, right strut 56, latch hook member 57, interlocking sheet 58, strong magnet 591 and suction buckle 592, described left even part 511 and described right even part 512, it is opening flute profile stamping backward, described left part 511 and the described right both sides connecting part 512 flute profile of connecting have mutual to perforation, the middle and lower part sliding block joint cast saddle 52 of described seat pipe 31 pipe, described cast saddle 52 is cut-out workpieces of an aluminium extruded type, the front of described cast saddle 52, left back and right abaft, each with outwardly directed flute profile, described cast saddle 52 front, the both sides of left back and right abaft flute profile respectively have mutual to perforation, on front side of described cast saddle 52, be positioned at the bottom land forwards stretching out flute profile and have a tapped bore, the rear side of described cast saddle 52, a tapped bore is had between left back and two flute profiles of right abaft, interlocking sheet 58 is fastened in the tapped bore on front side of described seat pipe 31 lower end by bolt, described interlocking sheet 58, form with the sheetmetal right-angle bending of a bar shaped, described interlocking sheet 58 have one twist connect hole, revolver bar 53 and right upper end of taking turns bar 54 are rotationally connected with described left even part 511 and described right even part 512 respectively, described revolver bar 53 and described rightly take turns bar 54, it is welded top one pipeloop of a pipe, the parts of a flute profile stamping are welded in the front side on top, described revolver bar 53 and described right transverse direction also each welding one minor axis of taking turns bar 54 bottom, described revolver bar 53 and described right both sides of taking turns bar 54 flute profile stamping have one mutual to perforation, right side in the middle part of described revolver bar 53 also has a tapped bore, described revolver bar 53 and described right pipeloop of taking turns bar 54 are respectively by lock bolt, with described left even part 511 and described right even mutual being rotationally connected perforation of part 512 flute profile, described left strut 55 and described right strut 56, the parts of front-end and back-end respectively with a cast, the front end cast of described left strut 55 and described right strut 56, respectively by mutual being rotationally connected perforation of flute profile to lock bolt and described cast saddle 52 left back and right abaft, the rear end cast of described left strut 55 and described right strut 56 is respectively by lock bolt, with described revolver bar 53 and described right mutual being rotationally connected perforation of flute profile stamping taking turns bar 54, described revolver bar 53 and described right minor axis each socket one trailing wheel 8 respectively of taking turns bar 54 lower end, described trailing wheel 8 is inflated wheel of 10 inches, the middle part of described strong magnet 591 has to twist and connects hole, described strong magnet 591 is fastened in the tapped bore on rear side of described cast saddle 52 by bolt, suction buckle 592 is fastened in the tapped bore of rear side in the middle part of described seat pipe 31 by bolt, described suction buckle 592, form with the sheetmetal right-angle bending of a bar shaped, described suction buckle 592 have one twist connect hole, described revolver bar 53 and described right take turns bar 54 mutually draw in time, described strong magnet 591 mutually holds with described suction buckle 592 and fixes, described latch hook member 57 is by interlocking hook, spring and dowel bolt are formed, interlocking hook is that lower end becomes hook-type, there is collar aperture at middle part, the parts of upper bands handle, the handle of interlocking hook there is an elongated hole, the elongated hole of interlocking hook is corresponding with the tapped bore on front side of described cast saddle 52, described spring is positioned between tapped bore on front side of described cast saddle 52 and the elongated hole of interlocking hook, penetrate with dowel bolt in the elongated hole of interlocking hook with in spring, be screwed in the tapped bore on front side of described cast saddle 52 again, when described rear linkage rack 5 launches, interlocking hook can hook described interlocking sheet 58.

Described saddle 32 is connected with saddle pipe, and the saddle pipe of described saddle 32 is connected in the pipe pore of described seat pipe 31.

Described front fork 4, comprise front fork tube, Five-way tube, revolver forks piece and rightly take turns forks piece, the below welding Five-way tube of front fork tube, the below welding revolver forks piece of Five-way tube and rightly take turns forks piece, revolver forks piece is that top is with arc opening, bottom is with the strip metal punching of U-shaped gap, right forks piece of taking turns is strip metal stamping with two right-angle bendings in the middle part of in the of one, right top of taking turns forks piece is with arc opening, right bottom of taking turns forks piece is with U-shaped gap, revolver forks piece after welding with Five-way tube and described rightly take turns forks piece, forming one with Five-way tube is font, front fork tube by seven bowls and described before head tube 2 be rotationally connected, with right wheel in the U-shaped gap of forks piece, front-wheel 7 is installed in the U-shaped gap of revolver forks piece, described front-wheel 7 is inflated wheel of 10 inches.

Described V-shaped folding hand is 6, comprise hand pedestal 61, left hand is 62, right handgrip 63, left lock-connecting piece 64, right lock-connecting piece 65, described hand is made up of pedestal 61 pedestal moulding and interior poling, described interior poling comprises pipe and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, the lower end of described interior poling pipe is with angle, a bolt is respectively welded in the both sides on described interior poling pipe top, the bolt that the related both sides, top of described interior poling connect together injection moulding in described pedestal moulding, described pedestal moulding becomes upper base long, to go to the bottom short isosceles trapezoid shape, the right and left of described pedestal moulding has groove, the groove on the described pedestal moulding left side is opening groove left, groove on the right of described pedestal moulding is opening groove to the right, the right and left top of described pedestal moulding is U-lag, bottom is flat-bottom slot, the U-lag of the right and left of described pedestal moulding with described left hand corresponding for the caliber of 62 and described right handgrip 63, the both sides of described pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, described hand is poling in pedestal 61, coordinate bowl-type pad, hanging bolt and slope nut, penetrate in the front fork assembly pipe of described front fork assembly 4, tighten hanging bolt, slope nut and described hand is made poling in pedestal 61 to be tightened up and misplace, thus make described hand that poling in pedestal 61 is fixedly connected in front fork assembly pipe, described left hand is 62 and described right handgrip 63, connected and composed by pipe and cast, described left hand is 62 and the pipe upper bend of described right handgrip 63, described left hand is connected cast 62 with the bottom of described right handgrip 63 pipe.

Described left lock-connecting piece 64 is by a plagiocephaly barrel 641, one round head bolt 642 and a nut 643 are formed, described plagiocephaly barrel 641 is that an of barrel makes plagiocephaly, the head of described plagiocephaly barrel 641 and described left hand are the lower weld of 62, twist in the tapped bore of described plagiocephaly barrel 641 and connect described round head bolt 642, the nut 643 connect described in one is also twisted at the stubborn place of connecing of described round head bolt 642 and described plagiocephaly barrel 641, described right lock-connecting piece 65 is by channel 651, latch hook 652, to connecting bolt 653, spring 654 and dowel bolt 655 are formed, described channel 651 is opening flute profiles backward, the right head of described channel 651 is plagiocephaly, the both sides up and down of described channel 651 flute profile left part have mutual to perforation, a tapped bore is had in the middle part of the flute profile of described channel 651, the right head of described channel 651 and the lower weld of described right handgrip 63, mutual perforation is rotationally connected connecting bolt 653 and the collar aperture in the middle part of described latch hook 652 by described in described channel about 651 both sides, described latch hook 652 is that left end becomes hook-type, there is collar aperture at middle part, the parts of right part band handle, the handle of described latch hook 652 there is an elongated hole, the elongated hole of described latch hook 652 is corresponding with the tapped bore of described channel 651, between the tapped bore that described spring 654 is positioned over described channel 651 and the elongated hole of described latch hook 652, penetrate in spring 654 in the elongated hole of described latch hook 652 He described with described dowel bolt 655, be screwed into again in the tapped bore of described channel 651.

Described left hand is the cast of the cast of 62 and described right handgrip 63, by two to lock bolt, be rotationally connected with respectively described pedestal moulding the right and left mutual to perforation, left hand described in expansion is 62 and described right handgrip 63, the described latch hook 652 of described right lock-connecting piece 65 is under the effect of described spring 654, the described round head bolt 642 of described left lock-connecting piece 64 can be hooked instantaneously, mutual interlocking between described right lock-connecting piece 65 and described left lock-connecting piece 64, the left hand described in realization 62, described right handgrip 63 and described hand be interfixing between pedestal 61.

Described driver train 9 comprises axis, crank, chain wheel, pedal, flywheel and chain, described axis is rotationally connected with in the Five-way tube of described front fork 4 by axis accessory, crank described in two is fixedly connected on two of described axis, described chain wheel is fixed on right crank, pedal described in two is connected to crank described in two, described pedal is folding pedals, and described flywheel is connected to the right side of described front-wheel 7, and described chain is wire-wrapped in described chain wheel and described flywheel.

Claims (9)

1. a four-bar linkage folds the portable tricycle of forerunner's dynamic formula, comprise four-bar linkage folded bicycle beam, front head tube, seat pipe, saddle, locator card, front fork, rear linkage rack, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, it is characterized in that: four-bar linkage folded bicycle beam comprises foldable base, front-axle beam pipe, back rest pipe, rotating vane, flute profile folded piece, thick-walled tube, car beam latch hook and connecting rod, foldable base is opening flute profile stamping backwards, the upper and lower of foldable base flute profile both sides respectively has one mutual to perforation, foldable base is welded in the rear side of front head tube bottom, the front end welding rotating vane of front-axle beam pipe, the below welding thick-walled tube of the rear end of front-axle beam pipe, in the pore of front-axle beam pipe rear end, car beam latch hook and torsion spring are also installed, the rotating vane being welded in front-axle beam pipe is by lock bolt and mutual being rotationally connected perforation in foldable base top, back rest pipe rear end welding base pipe, the front end welding flute profile folded piece of back rest pipe, flute profile folded piece is the flute profile stamping that Open Side Down, the front and rear of flute profile folded piece both sides respectively has one mutual to perforation, flute profile folded piece anterior mutual to perforation by being rotationally connected lock bolt and thick-walled tube, foldable base bottom mutual to perforation by enclosing be rotationally connected before lock bolt and connecting rod, connecting rod is that the two ends of the Metallic rod of a flat strip shaped respectively connect a circle, the rear circle of connecting rod is by lock bolt and mutual being rotationally connected perforation in flute profile folded piece rear portion, car beam latch hook in the pore of front-axle beam pipe rear end is under the effect of torsion spring, the top margin of flute profile folded piece front end can be pinned, locator card is connected to the top at front-axle beam pipe rear portion, locator card is the Plastic Parts of a band C shape bayonet socket, head tube before locator card can fasten after four-bar linkage folded bicycle beam is folding, seat pipe is upper connects rear linkage rack, rear linkage rack comprises left even part, right even part, cast saddle, revolver bar, rightly take turns bar, left strut, right strut, latch hook member, interlocking sheet, strong magnet and suction buckle, left even part and the right part that connects divide left and right to be welded in the rear side of a pipe, cast saddle is slidably connected on a pipe, interlocking sheet is fixed on a front side for pipe lower end, revolver bar and right upper end of taking turns bar are rotationally connected with left even part and right even part respectively, revolver bar and right top of taking turns bar are rotationally connected the rear end of left strut and right strut respectively, the front end of left strut and right strut is connected on cast saddle, revolver bar and right lower end of taking turns bar hold installation two trailing wheel respectively, cast saddle is twisted and connects strong magnet, rear side in the middle part of present pipe is also twisted and is connect a suction buckle, revolver bar and right take turns bar mutually draw in time, strong magnet holds suction buckle, and by revolver bar with rightly take turns the state that bar draws in mutually and fix, latch hook member is installed on the front of cast saddle, latch hook member can with interlocking sheet interlocking, front fork is welded by front fork tube, Five-way tube, revolver forks piece and right forks piece of taking turns, and front fork tube is rotationally connected by seven bowls and front head tube, and revolver forks piece is connected front-wheel with right lower end of taking turns forks piece, and saddle install is in the top of seat pipe, V-shaped folding hand handle is quick interlocking formula V-shaped folding hand handle, comprise hand pedestal, left hand handle, right handgrip, left lock-connecting piece, right lock-connecting piece, hand is made up of pedestal pedestal moulding and interior poling, interior poling injection moulding is in pedestal moulding, the right and left of pedestal moulding has groove, the right and left top of pedestal moulding is U-lag, bottom is flat-bottom slot, the both sides of pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, hand coordinates pedestal with bowl-type pad by interior poling, hanging bolt and slope nut, be fixedly connected in the front fork tube of front fork, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the plagiocephaly barrel of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a plagiocephaly barrel, one round head bolt and a nut are formed, twist in plagiocephaly barrel and connect round head bolt, the stubborn place of connecing of round head bolt and plagiocephaly barrel also twists and connects a nut, the channel of the right lock-connecting piece of lower weld of right handgrip, right lock-connecting piece is by channel, latch hook, to connecting bolt, spring and dowel bolt are formed, the both sides up and down of the flute profile left part of channel have mutual to perforation, a tapped bore is had in the middle part of the flute profile of channel, the upper and lower both sides of channel mutual to perforation by being rotationally connected the collar aperture in the middle part of connecting bolt and latch hook, latch hook is that left end becomes hook-type, there is collar aperture at middle part, the parts of right part band handle, the handle of latch hook there is an elongated hole, spring is positioned between the tapped bore of channel and the elongated hole of latch hook, penetrate with dowel bolt in the elongated hole of latch hook with in spring, be screwed into again in the tapped bore of channel, the cast of left hand handle and the cast of right handgrip, by two to lock bolt, be rotationally connected with respectively pedestal moulding the right and left mutual to perforation, the latch hook of right lock-connecting piece under the action of the spring, hook the round head bolt of left lock-connecting piece and realize interlocking, driver train comprises axis, crank, chain wheel, pedal, flywheel and chain, axis is rotationally connected with in five-way by axis accessory, two cranks are fixedly connected on two of axis, chain wheel is fixed on right crank, two pedals are connected to two cranks, flywheel is connected to the right side of front-wheel, and chain is wire-wrapped in chain wheel and flywheel.

2. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described front-axle beam pipe is a rectangular tube, described rotating vane is the sheet component of upper end band cast, the described thick-walled tube welded with described front-axle beam pipe is transversely arranged, go back close-fitting in the pore of described front-axle beam pipe rear end and be socketed one section of rectangular tube as reinforcement, the left and right sides of described front-axle beam pipe rear end, inconjunction with socket wherein one section of rectangular tube has one mutual to perforation together, the top of described front-axle beam pipe rear end, inconjunction with socket wherein one section of rectangular tube has an elongated hole together.

3. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described car beam latch hook is bottom is cast, top is the sliced pieces of the Al squeezing material of hook-type, the middle part of described car beam latch hook becomes rod, one of the cast of described car beam latch hook is penetrated from the top down in described front-axle beam pipe range hole, and by the cast of described car beam latch hook correspond to described front-axle beam pipe mutual to perforation, put into torsion spring again, make torsion spring lower tube wall pushed down in one section of rectangular tube pore, one of torsion spring is made to push down on described car beam latch hook rod, again with to lock bolt penetrate described front-axle beam pipe mutual to perforation in, in torsion spring collar aperture and in the collar aperture of described car beam latch hook cast, and to stubborn location.

4. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described left even part and described right even part, it is opening flute profile stamping backward, described left part and the described right both sides connecting part flute profile of connecting have mutual to perforation, described cast saddle is the cut-out workpiece of an aluminium extruded type, the front of described cast saddle, left back and right abaft, each with outwardly directed flute profile, described cast saddle front, the both sides of left back and right abaft flute profile respectively have mutual to perforation, on front side of described cast saddle, be positioned at the bottom land forwards stretching out flute profile and have a tapped bore, the rear side of described cast saddle, a tapped bore is had between left back and two flute profiles of right abaft.

5. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described interlocking sheet forms with the sheetmetal right-angle bending of a bar shaped, described interlocking sheet have one twist connect hole, described revolver bar and described rightly take turns bar, it is welded top one pipeloop of a pipe, the parts of a flute profile stamping are welded in the front side on top, described revolver bar and described right transverse direction also each welding one minor axis of taking turns bar bottom, described revolver bar and described right both sides of taking turns bar flute profile stamping have one mutual to perforation, described left strut and described right strut, the parts of front-end and back-end respectively with a cast, described revolver bar and described right minor axis each socket one trailing wheel respectively of taking turns bar lower end, described strong magnet is fastened in the tapped bore on rear side of described cast saddle by bolt, suction buckle is fastened in the tapped bore of rear side in the middle part of described seat pipe by bolt, described suction buckle, form with the sheetmetal right-angle bending of a bar shaped, described suction buckle have one twist connect hole.

6. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described latch hook member is by interlocking hook, spring and dowel bolt are formed, interlocking hook is that lower end becomes hook-type, there is collar aperture at middle part, the parts of upper bands handle, the handle of interlocking hook there is an elongated hole, the elongated hole of interlocking hook is corresponding with the tapped bore on front side of described cast saddle, described spring is positioned between tapped bore on front side of described cast saddle and the elongated hole of interlocking hook, penetrate with dowel bolt in the elongated hole of interlocking hook with in spring, be screwed into again in the tapped bore on front side of described cast saddle.

7. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: the below welding Five-way tube of front fork tube, the below welding revolver forks piece of Five-way tube and rightly take turns forks piece, revolver forks piece is top with arc opening, bottom with the strip metal punching of U-shaped gap, right forks piece of taking turns is strip metal stamping with two right-angle bendings in the middle part of in the of one, right top of taking turns forks piece is with arc opening, right bottom of taking turns forks piece is with U-shaped gap, revolver forks piece after welding with Five-way tube and described rightly take turns forks piece, forming one with Five-way tube is font.

8. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described interior poling comprises pipe and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, the lower end of described interior poling pipe is with angle, a bolt is respectively welded in the both sides on described interior poling pipe top, described pedestal moulding becomes upper base long, to go to the bottom short isosceles trapezoid shape, the right and left of described pedestal moulding has groove, the groove on the described pedestal moulding left side is opening groove left, groove on the right of described pedestal moulding is opening groove to the right, the U-lag of the right and left of described pedestal moulding with described left hand corresponding with the caliber of described right handgrip.

9. four-bar linkage according to claim 1 folds the portable tricycle of forerunner's dynamic formula, it is characterized in that: described plagiocephaly barrel is that an of barrel makes plagiocephaly, the head of described plagiocephaly barrel and the lower weld of described left hand handle, described channel is opening flute profile backward, the right head of described channel is plagiocephaly, the right head of described channel and the lower weld of described right handgrip, mutual interlocking between described right lock-connecting piece and described left lock-connecting piece, the left hand described in realization, described right handgrip and described hand interfixing between pedestal.