CN204383693U

CN204383693U - Trailing wheel turning formula folding portable battery-driven car

Info

Publication number: CN204383693U
Application number: CN201520020521.3U
Authority: CN
Inventors: 庞明方
Original assignee: Taicang Chezhongbao Leisure Products Co Ltd
Current assignee: Taicang Chezhongbao Leisure Products Co Ltd
Priority date: 2015-01-13
Filing date: 2015-01-13
Publication date: 2015-06-10
Anticipated expiration: 2025-01-13

Abstract

A kind of trailing wheel turning formula folding portable battery-driven car, comprise folded bicycle beam, rear tubular member, seat pipe, saddle, locator card, V-shaped folding hand handle, back vent, gear cluster, front-wheel, trailing wheel and electric drive system, there is front fork folded bicycle beam front end, front fork connects front-wheel, folded bicycle beam can be undertaken two by connecting rod and fold, rear tubular member welds with seat pipe, the pipe of rear tubular member is rotationally connected V-shaped folding hand handle, the bottom of V-shaped folding hand handle connects the front gear of gear cluster, back vent is rotationally connected in the bearing seat of rear tubular member, back vent connects trailing wheel, the top of back vent also connects the backgear of gear cluster, seat pipe connects saddle, the saddle pipe of saddle also connects locator card, electric drive system comprises motor, battery, controller and master cock, motor is arranged at front-wheel, battery and controller are all arranged in the front-axle beam pipe of folded bicycle beam.

Description

Trailing wheel turning formula folding portable battery-driven car

Technical field

The utility model relates to a kind of folding portable type battery-driven car, particularly a kind of trailing wheel turning formula folding portable battery-driven car.

Technical background

Several money folding electric bicycles that the design people formerly designs, although the folding portable electric bicycle having that folding rate is fast, fold smaller, due to the reason such as structure and structure, still fail to reach promising result little as far as possible after folding.

Utility model content

The purpose of this utility model to provide a kind of folded bicycle beam, and handlebar is arranged on below saddle, and adopt trailing wheel turning mode---trailing wheel turning formula folding portable battery-driven car.The purpose of this utility model realizes like this, trailing wheel turning formula folding portable battery-driven car, comprise folded bicycle beam, rear tubular member, seat pipe, saddle, locator card, V-shaped folding hand handle, back vent, gear cluster, front-wheel, trailing wheel and electric drive system, it is characterized in that: folded bicycle beam comprises foldable base, back rest pipe, front-axle beam pipe, rear rotating vane, thick-walled tube, flute profile folded piece, car beam latch hook, connecting rod, front fork and step, foldable base is opening flute profile stamping forward, the upper and lower of foldable base flute profile both sides respectively has one mutual to perforation, foldable base is welded in the front side of rear tubular member, rotating vane after the welding of back rest pipe rear end, the top welding thick-walled tube of back rest pipe front end, in the pore of back rest pipe front end, car beam latch hook and torsion spring are also installed, the collar aperture of rear rotating vane is by lock bolt and mutual being rotationally connected perforation in foldable base bottom, the rear end welding flute profile folded piece of front-axle beam pipe, flute profile folded piece is the flute profile stamping of opening upwards, the front and rear of flute profile folded piece both sides respectively has one mutual to perforation, the front end welding front fork of front-axle beam pipe, the left and right sides of front-axle beam pipe front portion also respectively connects a step, step is made up of step seat and pedal stroke, two step seats are welded in the left and right sides of front-axle beam pipe front portion, two pedal strokes are connected on two step seats by two to lock screws, front fork connects front-wheel, flute profile folded piece rear portion mutual to perforation by lock bolt and thick-walled tube be rotationally connected, mutual perforation is connected with the rear end thereof of connecting rod in foldable base top, it is anterior mutual to perforation that the front end of connecting rod is rotationally connected with flute profile folded piece, connecting rod comprises left connecting rod, right connecting rod and barrel, left connecting rod and right connecting rod are the rod like parts that two ends become right-angle bending in the same way, the bending part of left connecting rod and right connecting rod rear end has screw thread, the bending part of left connecting rod and right connecting rod front end has pin-and-hole, barrel has attacked screw thread in the pore of a tubular piece, barrel is positioned over foldable base top mutual to perforation between, with the screw thread of left connecting rod and right connecting rod rear end bending part penetrate respectively foldable base top mutual in perforation, with be screwed in the tapped bore of barrel, namely complete connecting rod and foldable base top mutual to being rotationally connected of boring a hole, the bending part of left connecting rod and right connecting rod front end is buckled into respectively flute profile folded piece anterior mutual in perforation, and overlap Upper gasket, pin location on pin, namely connecting rod and flute profile folded piece is completed anterior mutual to being rotationally connected of boring a hole, car beam latch hook in the pore of back rest pipe front end is under the effect of torsion spring, the base of flute profile folded piece rear end can be pinned, rear tubular member is by a pipe, one bearing seat and a connection pipe are welded, the upper end of rear tubular member pipe pore is provided with headset group, the lower end of rear tubular member pipe pore is provided with bearing, the upper and lower side of rear tubular member bearing seat respectively inlays a bearing, the front side on rear tubular member pipe top is welded with seat pipe, seat pipe is by a pipe, one connection pipe and a pipe clamp are formed, the connection pipe of the rear side welding base pipe of seat pipe pipe bottom, the top socket pipe clamp of seat pipe pipe, saddle is connected to seat pipe, saddle is also connected locator card with the junction of seat pipe, locator card is that a cast blocks with C shape the Plastic Parts be integrally connected, the cast borehole jack of locator card is connected on the saddle pipe of saddle, after folded bicycle beam is folding, locator card blocks the tire of front-wheel, and it is not loose after making folded bicycle beam folding, 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 lower end of interior poling is connected with hexagon prism, there is tapped bore the centre of the bottom of hexagon prism, interior poling penetrates in the headset group of rear tubular member pipe upper end, the hexagon prism of interior poling lower end is made to penetrate in the bearing bore of rear tubular member pipe lower end, and win downwards, 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, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the trapezoid block of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a trapezoid block, one round head bolt and a nut are formed, the right side of trapezoid block is twisted and is connect round head bolt, the stubborn place of connecing of round head bolt and trapezoid block 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, hooks the round head bolt of left lock-connecting piece and realizes interlocking, gear cluster includes front gear and backgear, front gear and back-geared center are all with hexagon ring, front gear is socketed on the lower end of interior poling hexagon prism by hexagon ring, and be fastened to bolt tie spacer in the tapped bore of interior poling hexagon prism bottom and locate, the top of back vent is connected with hexagon prism, there is tapped bore the centre on the hexagon prism top of back vent, the hexagon prism of back vent is socketed backgear, the hexagon prism of back vent penetrates in the two bearings endoporus on rear tubular member bearing seat from bottom to top, and be fastened to bolt tie spacer in the tapped bore on hexagon prism top in rear wheel fork and locate, trailing wheel is connected in rear wheel fork, electric drive system comprises motor, battery, controller and master cock, and motor is arranged at front-wheel, and battery and controller are all arranged in front-axle beam pipe.

The beneficial effects of the utility model are: the utility model adopts handlebar to be arranged on below saddle, and adopt trailing wheel turning mode, front-wheel is located in driving, this car is made to have a kind of fraicheur mode of riding, the handlebar below folded bicycle beam and saddle is adopted to adopt quick interlocking formula V-shaped folding hand handle, make folding more effectively and small and exquisite, adopt rear tubular member and V-shaped folding hand that, gear cluster and the ingenious of back vent are coordinated, trailing wheel turning be achieved; Motor is arranged at front-wheel, and battery and controller are all arranged in front-axle beam pipe, make electric drive system of the present utility model relatively hiding.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation

Fig. 2 is the constructional drawing that the utility model latch hook and flute profile folded piece coordinate interlocking

Fig. 3 is the organigram of the utility model connecting rod

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 folding process schematic diagram of the utility model vehicle body main body

Fig. 7 is that the utility model folds complete figure

In figure: 1---folded bicycle beam, 2---rear tubular member, 31---seat pipe, 32---saddle, 33---locator card, 4---V-shaped folding hand handle, 5---back vent, 6---gear cluster, 7---front-wheel, 8---trailing wheel, 9---electric drive system; Wherein folded bicycle beam 1 also comprises: 11---foldable base, and 121---back rest pipe, 122---front-axle beam pipe, 13---rear rotating vane, 14---thick-walled tube, 15---flute profile folded piece, 16---car beam latch hook, 17---connecting rod, 18---front fork, 19---step; V-shaped folding hand also comprises 4: 41---hand pedestal, 42---left hand handle, 43---right handgrip, 44---left lock-connecting piece, 45---right lock-connecting piece; Left lock-connecting piece 44 also comprises: 441---trapezoid block, and 442---round head bolt, 443---nut; Right lock-connecting piece 45 also comprises: 451---channel, and 452---latch hook, 453---to connecting bolt, 454---spring, 455---dowel bolt; Electric drive system 9 also comprises: 91---motor, and 92---battery, 93---controller, 94---master cock; Master cock 94 also comprises: 941---speed control crank, and 942---power-off brake lever, 943---Energy control is locked.

Detailed description of the invention

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, described trailing wheel turning formula folding portable battery-driven car, comprise folded bicycle beam 1, rear tubular member 2, seat pipe 31, saddle 32, locator card 33, V-shaped folding hand 4, back vent 5, gear cluster 6, front-wheel 7, trailing wheel 8 and electric drive system 9;

Described folded bicycle beam 1 comprises foldable base 11, back rest pipe 121, front-axle beam pipe 122, rear rotating vane 13, thick-walled tube 14, flute profile folded piece 15, car beam latch hook 16, connecting rod 17, front fork 18 and step 19, described foldable base 11 is opening flute profile stampings forward, the upper and lower of described foldable base 11 flute profile both sides respectively has one mutual to perforation, and described foldable base is welded in the front side of described rear tubular member 2.

Described back rest pipe 121 is rectangular tubes, rotating vane 13 after the rear end welding of described back rest pipe 121, described rear rotating vane 13 is sheet components of lower end band cast, the top welding thick-walled tube 14 of described back rest pipe 121 front end, thick-walled tube 14 described in welding with described back rest pipe 121 front end is transversely arranged, go back close-fitting in the pore of described back rest pipe 121 front end and be socketed one section of rectangular tube as reinforcement, the left and right sides of described back rest pipe 121 front end, inconjunction with socket wherein one section of rectangular tube has one mutual to perforation together, the below of described back rest pipe 121 front end, inconjunction with socket wherein one section of rectangular tube has an elongated hole together, described car beam latch hook 16 is tops is cast, bottom is the sliced pieces of the Al squeezing material of hook-type, the middle part of described car beam latch hook 16 becomes rod, one of the cast of described car beam latch hook 16 is penetrated from bottom to top in described back rest pipe 121 elongated hole, and by the cast of described car beam latch hook 16 correspond to described back rest pipe 121 mutual to perforation, putting into torsion spring, make torsion spring upper tube wall pushed down in one section of rectangular tube pore, make on torsion spring rod pushing down described car beam latch hook 16, again with to lock bolt penetrate described back rest pipe 121 mutual to perforation in, in torsion spring collar aperture and in the collar aperture of described car beam latch hook 16 cast, and to stubborn location, the cast of described rear rotating vane 13 passes through lock bolt, with mutual being rotationally connected perforation in described foldable base 11 bottom.

Described front-axle beam pipe 122 is rectangular tubes, the rear end welding flute profile folded piece 15 of described front-axle beam pipe 122, described flute profile folded piece 15 is flute profile stampings of opening upwards, the front and rear of described flute profile folded piece 15 both sides respectively has one mutual to perforation, the front end welding front fork 18 of described front-axle beam pipe 122, described front fork 18 is with the rammed fork-shaped of the sheetmetal of a flat bar, the lower end of described front fork 18 both sides has mutual U-shaped gap, connect front-wheel 7 in the U-shaped gap of described front fork 18, described front-wheel 7 is wheel hub motor wheels of 8 inches.

Described flute profile folded piece 15 rear portion mutual to perforation by lock bolt and described thick-walled tube 14 be rotationally connected, mutual perforation is connected with the rear end thereof of connecting rod 17 in described foldable base 11 top, it is anterior mutual to perforation that the front end of described connecting rod 17 is rotationally connected with described flute profile folded piece 15, described connecting rod 17 comprises left connecting rod, right connecting rod and barrel, left connecting rod and right connecting rod are the right-angle bendings that the two ends of two metal round rod become in the same way, then left connecting rod and the paired shape of right connecting rod coordinate, the bending part of described left connecting rod and described right connecting rod rear end has screw thread, the bending part of described left connecting rod and described right connecting rod front end has pin-and-hole, barrel has attacked screw thread in the pore of a tubular piece, barrel is positioned over described foldable base 11 top mutual to perforation between, with the screw thread of described left connecting rod and described right connecting rod rear end bending part penetrate respectively described foldable base 11 top mutual in perforation, with be screwed in the tapped bore of barrel, namely complete described connecting rod 17 and described foldable base 11 top mutual to being rotationally connected of boring a hole, the bending part of described left connecting rod and described right connecting rod front end is buckled into respectively described flute profile folded piece 15 anterior mutual in perforation, and overlap Upper gasket, pin location on pin, namely described connecting rod 17 and described flute profile folded piece 15 is completed anterior mutual to being rotationally connected of boring a hole, be arranged in the described car beam latch hook 16 of the pore of described back rest pipe 121 front end, the base of described flute profile folded piece 15 rear end can be pinned under the effect of torsion spring.

Described step 19, comprise step seat, pedal stroke and foot lever cover, step seat is opening flute profile stamping backward, the both sides up and down of step seat have mutual to perforation, two step seats are welded in the both sides of described front-axle beam pipe 122 front portion, pedal stroke is that one section of thick-walled tube is welded in one end of a pipe, the pipe of pedal stroke is socketed foot lever cover, foot lever cover is conventional Handlebar of bicycle grip, thick-walled tube on two pedal strokes, is rotationally connected with the step seat being welded in described front-axle beam pipe 122 front part sides lock bolt by two.

Described rear tubular member 2, comprise pipe, bearing seat and connection pipe, the connection pipe of described rear tubular member 2 is welded in the rear side of described rear tubular member 2 pipe bottom, the bearing seat of described rear tubular member 2 is welded in the rear end of described rear tubular member 2 connection pipe, the bearing seat of described rear tubular member 2 is tubular piece that each car of a upper and lower side has step, the upper end of the pipe pore of described rear tubular member 2 is provided with headset group, the lower end of described rear tubular member 2 pipe pore is inlaid with cup, embedded bearing in cup, the upper and lower side of described rear tubular member 2 bearing seat respectively inlays a bearing, the front side on described rear tubular member 2 pipe top is welded with described seat pipe 31, described seat pipe 31 is by pipe, connection pipe and pipe clamp are formed, the rear side of described seat pipe 31 pipe bottom welds the connection pipe of described seat pipe 31, the rear end of described seat pipe 31 connection pipe is welded with the pipe of described rear tubular member 2, the top socket pipe clamp of described seat pipe 31 pipe, described saddle 32 is connected with saddle pipe, the saddle pipe of described saddle 32 is connected in the pipe of described seat pipe 31, the saddle pipe of described saddle 32 and the junction of described seat pipe 31 are also socketed locator card 33, described locator card 33 is that a cast blocks with C shape the Plastic Parts be integrally connected, the cast borehole jack of described locator card 33 is connected on the saddle pipe of described saddle 32, after described folded bicycle beam 1 is folding, described locator card blocks the tire of described front-wheel 7.

Described V-shaped folding hand is 4, comprise hand pedestal 41, left hand is 42, right handgrip 43, left lock-connecting piece 44, right lock-connecting piece 45, described hand is made up of pedestal 41 pedestal moulding and interior poling, described interior poling comprises pipe, hexagon prism and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, a bolt is respectively welded in the both sides on described interior poling pipe top, the hexagon prism of the described interior poling of lower end welding of described interior poling pipe, there is a tapped bore at the center of the bottom of described interior poling hexagon prism, 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 42 and described right handgrip 43, the both sides of described pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, described hand penetrates poling in pedestal 41 in the headset group of described rear tubular member 2 pipe upper end, the hexagon prism of interior poling lower end is made to penetrate in the bearing bore of described rear tubular member 2 pipe lower end, and win downwards, described left hand is 42 and described right handgrip 43, connected and composed by pipe and cast, described left hand is 42 and the pipe upper bend of described right handgrip 43, described left hand is connected cast 42 with the bottom of described right handgrip 43 pipe.

Described left lock-connecting piece 44 is by a trapezoid block 441, one round head bolt 442 and a nut 443 are formed, described trapezoid block 441 is metals of a right angle trapezoid block shape, the one-tenth inclined-plane, the left side of described trapezoid block 441, the right side is threaded hole, the left side of described trapezoid block 441 and described left hand are the lower weld of 42, twist in the tapped bore on described trapezoid block 441 right side and connect described round head bolt 442, the nut 443 connect described in one is also twisted at the stubborn place of connecing of described round head bolt 442 and described trapezoid block 442, described right lock-connecting piece 45 is by channel 451, latch hook 452, to connecting bolt 453, spring 454 and dowel bolt 455 are formed, described channel 451 is opening flute profiles backward, the right head of described channel 451 is plagiocephaly, the both sides up and down of described channel 451 flute profile left part have mutual to perforation, a tapped bore is had in the middle part of the flute profile of described channel 451, the right head of described channel 451 and the lower weld of described right handgrip 43, mutual perforation is rotationally connected connecting bolt 453 and the collar aperture in the middle part of described latch hook 452 by described in described channel about 451 both sides, described latch hook 452 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 452 there is an elongated hole, the elongated hole of described latch hook 452 is corresponding with the tapped bore of described channel 451, between the tapped bore that described spring 454 is positioned over described channel 451 and the elongated hole of described latch hook 452, penetrate in spring 454 in the elongated hole of described latch hook 452 He described with described dowel bolt 455, be screwed into again in the tapped bore of described channel 451.

Described left hand is the cast of the cast of 42 and described right handgrip 43, 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 42 and described right handgrip 43, the described latch hook 452 of described right lock-connecting piece 45 is under the effect of described spring 454, the described round head bolt 442 of described left lock-connecting piece 44 can be hooked instantaneously, mutual interlocking between described right lock-connecting piece 45 and described left lock-connecting piece 44, the left hand described in realization 42, described right handgrip 43 and described hand be interfixing between pedestal 41.

Described gear cluster 6 includes front gear and backgear, described front gear and described backgear are all nylon gears, described front gear and described back-geared center are all with hexagon ring, described front gear is socketed on the lower end of described interior poling hexagon prism by hexagon ring, and be fastened to bolt tie spacer in the tapped bore of described interior poling hexagon prism bottom and locate, described back vent 5 is that the metal stamping top of a fork-shaped is connected with hexagon prism, the lower end of described back vent both sides has mutual to perforation, there is tapped bore the centre on described back vent 5 hexagon prism top, the hexagon prism of described back vent 5 is socketed backgear, the hexagon prism of described back vent 5 penetrates in the two bearings endoporus of described rear tubular member 2 bearing seat from bottom to top, and be fastened to bolt tie spacer in the tapped bore on described back vent 5 hexagon prism top and locate, described trailing wheel 8 is connected on described back vent 5, described trailing wheel 8 is inflated wheel of 8 inches.

Described electric drive system 9 comprises: wheel hub motor 91, battery 92, controller 93 and master cock 94, described motor 91 is brushless hub electric motors, described motor 91 integrally configures combination with the wheel hub of described front-wheel 7, described battery 92 is lithium cell groups of series connection, described controller 93 is brushless motor controllers, described battery 92 and described controller 93 are all positioned in the pipe of described front-axle beam pipe 122, described master cock 94 comprises speed control crank 941, power-off brake lever 942 and Energy control lock 943, described Energy control lock 943 is installed on the rear portion of described front-axle beam pipe 122, described speed control crank 941 is installed on described right handgrip 43, described power-off brake lever 942 is installed on described left hand on 42 and on described right handgrip 43, described Energy control lock 943, described speed control crank 941 and described power-off brake lever 942, be connected with described controller 93 with connector by connection lead, described controller 93 is connected with described battery 92 and described motor 91 with connector by connection lead.

Claims

1. a trailing wheel turning formula folding portable battery-driven car, comprise folded bicycle beam, rear tubular member, seat pipe, saddle, locator card, V-shaped folding hand handle, back vent, gear cluster, front-wheel, trailing wheel and electric drive system, it is characterized in that: folded bicycle beam comprises foldable base, back rest pipe, front-axle beam pipe, rear rotating vane, thick-walled tube, flute profile folded piece, car beam latch hook, connecting rod, front fork and step, foldable base is opening flute profile stamping forward, the upper and lower of foldable base flute profile both sides respectively has one mutual to perforation, foldable base is welded in the front side of rear tubular member, rotating vane after the welding of back rest pipe rear end, the top welding thick-walled tube of back rest pipe front end, in the pore of back rest pipe front end, car beam latch hook and torsion spring are also installed, the collar aperture of rear rotating vane is by lock bolt and mutual being rotationally connected perforation in foldable base bottom, the rear end welding flute profile folded piece of front-axle beam pipe, flute profile folded piece is the flute profile stamping of opening upwards, the front and rear of flute profile folded piece both sides respectively has one mutual to perforation, the front end welding front fork of front-axle beam pipe, the left and right sides of front-axle beam pipe front portion also respectively connects a step, step is made up of step seat and pedal stroke, two step seats are welded in the left and right sides of front-axle beam pipe front portion, two pedal strokes are connected on two step seats by two to lock screws, front fork connects front-wheel, flute profile folded piece rear portion mutual to perforation by lock bolt and thick-walled tube be rotationally connected, mutual perforation is connected with the rear end thereof of connecting rod in foldable base top, it is anterior mutual to perforation that the front end of connecting rod is rotationally connected with flute profile folded piece, connecting rod comprises left connecting rod, right connecting rod and barrel, left connecting rod and right connecting rod are the rod like parts that two ends become right-angle bending in the same way, the bending part of left connecting rod and right connecting rod rear end has screw thread, the bending part of left connecting rod and right connecting rod front end has pin-and-hole, barrel has attacked screw thread in the pore of a tubular piece, barrel is positioned over foldable base top mutual to perforation between, with the screw thread of left connecting rod and right connecting rod rear end bending part penetrate respectively foldable base top mutual in perforation, with be screwed in the tapped bore of barrel, namely complete connecting rod and foldable base top mutual to being rotationally connected of boring a hole, the bending part of left connecting rod and right connecting rod front end is buckled into respectively flute profile folded piece anterior mutual in perforation, and overlap Upper gasket, pin location on pin, namely connecting rod and flute profile folded piece is completed anterior mutual to being rotationally connected of boring a hole, car beam latch hook in the pore of back rest pipe front end is under the effect of torsion spring, the base of flute profile folded piece rear end can be pinned, rear tubular member is by a pipe, one bearing seat and a connection pipe are welded, the upper end of rear tubular member pipe pore is provided with headset group, the lower end of rear tubular member pipe pore is provided with bearing, the upper and lower side of rear tubular member bearing seat respectively inlays a bearing, the front side on rear tubular member pipe top is welded with seat pipe, seat pipe is by a pipe, one connection pipe and a pipe clamp are formed, the connection pipe of the rear side welding base pipe of seat pipe pipe bottom, the top socket pipe clamp of seat pipe pipe, saddle is connected to seat pipe, saddle is also connected locator card with the junction of seat pipe, locator card is that a cast blocks with C shape the Plastic Parts be integrally connected, the cast borehole jack of locator card is connected on the saddle pipe of saddle, after folded bicycle beam is folding, locator card blocks the tire of front-wheel, and it is not loose after making folded bicycle beam folding, 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 lower end of interior poling is connected with hexagon prism, there is tapped bore the centre of the bottom of hexagon prism, interior poling penetrates in the headset group of rear tubular member pipe upper end, the hexagon prism of interior poling lower end is made to penetrate in the bearing bore of rear tubular member pipe lower end, and win downwards, 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, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the trapezoid block of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a trapezoid block, one round head bolt and a nut are formed, the right side of trapezoid block is twisted and is connect round head bolt, the stubborn place of connecing of round head bolt and trapezoid block 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, hooks the round head bolt of left lock-connecting piece and realizes interlocking, gear cluster includes front gear and backgear, front gear and back-geared center are all with hexagon ring, front gear is socketed on the lower end of interior poling hexagon prism by hexagon ring, and be fastened to bolt tie spacer in the tapped bore of interior poling hexagon prism bottom and locate, the top of back vent is connected with hexagon prism, there is tapped bore the centre on the hexagon prism top of back vent, the hexagon prism of back vent is socketed backgear, the hexagon prism of back vent penetrates in the two bearings endoporus on rear tubular member bearing seat from bottom to top, and be fastened to bolt tie spacer in the tapped bore on hexagon prism top in rear wheel fork and locate, trailing wheel is connected in rear wheel fork, electric drive system comprises motor, battery, controller and master cock, and motor is arranged at front-wheel, and battery and controller are all arranged in front-axle beam pipe.

2. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described back rest pipe is a rectangular tube, described rear rotating vane is the sheet component of lower end band cast, thick-walled tube described in welding with described back rest pipe front end is transversely arranged, go back close-fitting in the pore of described back rest pipe front end and be socketed one section of rectangular tube as reinforcement, the left and right sides of described back rest pipe front end, inconjunction with socket wherein one section of rectangular tube has one mutual to perforation together, the below of described back rest pipe front end, inconjunction with socket wherein one section of rectangular tube has an elongated hole together.

3. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described car beam latch hook is top is cast, bottom 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 bottom to top in described back rest pipe range hole, and by the cast of described car beam latch hook correspond to described back rest pipe mutual to perforation, putting into torsion spring, make torsion spring upper tube wall pushed down in one section of rectangular tube pore, make on torsion spring rod pushing down described car beam latch hook, again with to lock bolt penetrate described back rest 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. trailing wheel turning formula folding portable battery-driven car according to claim 1, is characterized in that: described front-axle beam pipe is a rectangular tube, and described front fork is with the rammed fork-shaped of the sheetmetal of a flat bar, and the lower end of described front fork both sides has mutual U-shaped gap.

5. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described step, comprise step seat, pedal stroke and foot lever cover, step seat is opening flute profile stamping backward, the both sides up and down of step seat have mutual to perforation, two step seats are welded in the both sides of described front-axle beam pipe front portion, pedal stroke is that one section of thick-walled tube is welded in one end of a pipe, the pipe of pedal stroke is socketed foot lever cover, foot lever cover is conventional Handlebar of bicycle grip, thick-walled tube on two pedal strokes passes through two to lock bolt, be rotationally connected with the step seat being welded in described front-axle beam pipe front part sides.

6. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described rear tubular member, comprise pipe, bearing seat and connection pipe, the connection pipe of described rear tubular member is welded in the rear side of described rear tubular member pipe bottom, the bearing seat of described rear tubular member is welded in the rear end of described rear tubular member connection pipe, the bearing seat of described rear tubular member is the tubular piece that each car of a upper and lower side has step, and the lower end of described rear tubular member pipe pore is inlaid with cup, embedded bearing in cup.

7. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described interior poling comprises pipe, hexagon prism and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, 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.

8. trailing wheel turning formula folding portable battery-driven car according to claim 1, it is characterized in that: described trapezoid block is the metal of a right angle trapezoid block shape, the one-tenth inclined-plane, the left side of described trapezoid block, the right side is threaded hole, the left side of described trapezoid block and the lower weld of described left hand handle, twist in the tapped bore on the described trapezoid block right side and connect described round head bolt, 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, left hand handle described in realization, described right handgrip and described hand are interfixing between pedestal.

9. trailing wheel turning formula folding portable bicycle according to claim 1, it is characterized in that: described front gear and described backgear are all nylon gears, described back vent is that the metal stamping top of a fork-shaped is connected with hexagon prism, and the lower end of described back vent both sides has mutual to perforation.

10. trailing wheel turning formula folding portable bicycle according to claim 1, it is characterized in that: described motor is brushless hub electric motor, the wheel hub of described motor and described front-wheel integrally configures combination, described battery is the lithium cell group of series connection, described controller is brushless motor controller, described battery and described controller are all positioned in the pipe of described front-axle beam pipe, described master cock comprises speed control crank, power-off brake lever and Energy control lock, described Energy control lock is installed on the rear portion of described front-axle beam pipe, described speed control crank is installed on described right handgrip, described power-off brake lever is installed on described left hand on upper and described right handgrip, described Energy control lock, described speed control crank and described power-off brake lever, be connected with described controller with connector by connection lead, described controller is connected with described battery and described motor with connector by connection lead.