CN203780703U

CN203780703U - Portable pedal bike capable of being quickly folded

Info

Publication number: CN203780703U
Application number: CN201420121606.6U
Authority: CN
Inventors: 庞明方
Original assignee: Taicang Chezhongbao Leisure Products Co Ltd
Current assignee: Taicang Chezhongbao Leisure Products Co Ltd
Priority date: 2014-03-18
Filing date: 2014-03-18
Publication date: 2014-08-20
Anticipated expiration: 2024-03-18

Abstract

The utility model relates to a portable pedal bike capable of being quickly folded. The pedal bike comprises a front frame, a bike body, a folded connecting rod, a front fork, a V-shaped folded handgrip, a front wheel, a rear wheel and a driving mechanism, wherein a second connecting lug and a front head pipe are welded to both ends of an inclined strut pipe of the front frame; a first connecting lug is welded with the front head pipe; a first hole, a second hole, a third hole, a fourth hole, a fifth hole, a sixth hole and a seventh hole are formed in the main part of the bike body; a first bearing and a second bearing are arranged in inserts of the bearings, and the inserts are positioned in the second hole and the third hole; the rear fork is connected with the sixth hole, the seventh hole and the rear wheel; the first hole is connected with the second connecting lug; the folded connecting rod is connected with the first connecting lug and the fifth hole; the front fork is connected with the front head pipe, the V-shaped folded handgrip and the front wheel; the driving mechanism is characterized in that a crank gear is mounted on the first bearing; a positioning shaft is fixed in the fourth hole; a pedal lever is sleeved with both ends of the positioning shaft; the pedal lever is connected with the connecting lugs and pedals; a swinging sheet is connected with the connecting lugs and the crank gear; an auxiliary shaft is connected with a chain wheel and a rear-stage gear; a free wheel is mounted on the rear wheel; a chain is wound on the chain wheel and the free wheel.

Description

Fast folding portable scooter

Technical field

The utility model relates to the scooter that a kind of bipod is stood and ridden, particularly a kind of fast folding portable scooter.

Background technology

The Quick-folding portable pedal bike that the design people formerly designed, has solved some portable problems and folding speed issue, but volume after folding still more greatly, light and handy not, aspect portable still not as people's will.

Utility model content

The purpose of this utility model is on the basis of original Quick-folding portable pedal bike, to design a kind of fast folding portable scooter more easily that folds and launch more fast, carries.The purpose of this utility model is achieved in that fast folding portable scooter, comprise side arm, vehicle body, folding connecting rod, front fork, V font folding hand handle, front-wheel, trailing wheel and driver train, it is characterized in that: side arm comprises front head tube, down tube, the first engaging lug and the second engaging lug, down tube is a rectangular tube, the first engaging lug is welded in the rear end of down tube, the front end of down tube is welded in the lower end of front head tube, and the second engaging lug is welded in the top of down tube and front head tube weld, vehicle body comprises main part, bearing inserts, clutch shaft bearing, two the second bearings and back vent, main part is the slice processing part of aluminium extruded type, the forward lower comer of main part has the first hole, there is the second hole at the middle part of main part, the rear in main part the second hole links up the 3rd hole, there is the 4th hole the front upper place in main part the second hole, the 5th hole, back upper place in main part the 4th hole, there is tandem the 6th hole and seven apertures in the human head at the rear in main part the 3rd hole, bearing inserts is that modification enhancing nylon is made, in bearing inserts, inlay clutch shaft bearing and two the second bearings, bearing inserts is installed on the right side in main part the second hole and the 3rd hole, back vent is fixedly connected on the 6th hole and seven apertures in the human head of main part by two pairs of lock bolts, and be positioned at the left and right sides at main part rear portion, the first hole of main part is by rotating and be connected with the first engaging lug lock bolt, folding connecting rod comprises front rod, rear linking rod, snap close, little spring and ball-headed bolt, front rod is that the below at front end and rear portion is respectively with the plastics rod like parts of a cross-perforating, there is a upper and lower through slotted hole at the rear portion of front rod, snap close and little spring are installed in the slotted hole of front rod, the front perforation of front rod is by being rotationally connected lock bolt and the second engaging lug, the rear perforation of front rod is by being rotationally connected the engaging lug of the front end of lock bolt and rear linking rod, rear linking rod is the parts that an engaging lug is respectively welded at the two ends of a rectangular tube, the top of rear linking rod rectangular tube front end is twisted and is connect a ball-headed bolt, the engaging lug of rear linking rod rear end is by being rotationally connected the 5th hole of lock bolt and main part, the ball-headed bolt of rear linking rod top can be by the snap close interlocking on front rod, front fork is rotationally connected by seven bowls and front head tube, front-wheel is installed on front fork, V font folding hand handle is fixedly connected with the front fork tube of front fork, trailing wheel is installed on back vent, driver train comprises fix shaft, treadle, engaging lug, step, pendulum, crankshaft toothed gear, rear class gear, countershaft, sprocket wheel, flywheel and chain, crankshaft toothed gear is by gear, bent axle in flakes, two nuts and two flat machine bolts form, gear is that modification enhancing nylon is made, there are two hexagonal counterbores on the left side of gear, each connects a through hole to the right two hexagonal counterbores, on gear, also has a crankshaft hole, the right side of gear has two halves columniform outstanding, groove between two semicircular cylindricality is corresponding with the external diameter of bent axle round steel in flakes, in two hexagonal counterbores of gear, respectively embed a nut, bent axle is that a round steel is bent into zigzag in flakes, again with circular punching welding, respectively there is a tapped bore at the center of bent axle zigzag round steel two ends end points in flakes, in the circular punching of bent axle, there are in flakes two hole and holes of wearing bent axle of wearing bolt, by columniform outstanding the penetrating to the right in the interior circular hole of clutch shaft bearing of gear two halves, the left end of bent axle is in flakes penetrated to the crankshaft hole of gear left and wins left, and the zigzag round steel of bent axle is in flakes closed up corresponding to the columniform groove of gear two halves simultaneously, with two flat machine bolts, penetrate left and wear in the hole of bolt and in two through holes of gear in two of the circular punching of bent axle in flakes again, again with embed nut in two hexagonal counterbores of gear and twist and connect, the 4th hole of fix shaft and main part is fixed, two of two treadles and fix shaft socket that rotates, two steps are installed on the rear end of two treadles, two engaging lugs are welded in below two treadle front portions, two pendulums are rotationally connected two engaging lugs, two pendulums are rotationally connected with respectively two of bent axle in flakes, rear class gear is arranged in the endoporus of two second bearings by countershaft, sprocket wheel and countershaft are fixed, flywheel is arranged on trailing wheel, chain is wire-wrapped on sprocket wheel and flywheel.

The beneficial effects of the utility model are: adopt side arm to be rotationally connected main part, folding connecting rod is rotationally connected side arm and main part, make the utility model folding quick, and simple structure again, intensity is high again, main part adopts aluminium extruded type section reprocessing, with back vent by lock bolt is fixedly connected on to the mode of main part, make production of the present utility model become easily simple, adopt bearing inserts that clutch shaft bearing and the second bearing are fixed on main part, make main part connection clutch shaft bearing and the second bearing become simple and effective, the crankshaft toothed gear of driver train is by gear, bent axle forms in flakes, make the structure of crankshaft toothed gear simpler, more reasonable.

Accompanying drawing explanation

Fig. 1 is effect structure figure of the present utility model

Fig. 2 is the synthetic left view of the utility model vehicle body and part driver train

Fig. 3 is the synthetic right elevation of the utility model vehicle body and part driver train

Fig. 4 is the constructional drawing of the utility model folding connecting rod

Fig. 5 is the utility model vehicle body folding process schematic diagram

Fig. 6 is the folding complete design sketch of the utility model

In figure: 1---side arm, 2---vehicle body, 3---folding connecting rod, 4---front fork, 5---V font folding hand handle, 6---front-wheel, 7---trailing wheel, 8---driver train; Wherein side arm 1 also comprises: 11---front head tube, and 12---down tube, 13---the first engaging lug, 14---the second engaging lug; Vehicle body 2 also comprises: 21---main part, and 22---bearing inserts, 23---clutch shaft bearing, 24---the second bearing, 25---back vent; On main part 21, also include: 211---the first hole, 212---the second hole, 213---the 3rd hole, 214---the 4th hole, 215---the 5th hole, 216---the 6th hole, 217---seven apertures in the human head; Folding connecting rod 3 also comprises: 31---front rod, and 32---rear linking rod, 33---snap close, 34---little spring, 35---ball-headed bolt; V font folding hand also comprises 5: 51---handgrip pedestal, 52---U-lag plastic lining, 531---the left part that connects, 532---the right part that connects, 541---left hand handle, 542---right handgrip, 55---to lock bolt, 561---left lock-connecting piece, 562---right lock-connecting piece, 57---hole cylinder, 58---quick detach, 59---safety catch; Driver train 8 also comprises: 81---fix shaft, and 821---treadle, 822---engaging lug, 823---step, 83---pendulum, 84---crankshaft toothed gear, 85---rear class gear, 86---countershaft, 87---sprocket wheel, 88---flywheel, 89---chain; Crankshaft toothed gear 84 also comprises: 841---gear, and 842---bent axle in flakes.

The specific embodiment

According to Fig. 1, Fig. 2, Fig. 3, described fast folding portable scooter, comprise side arm 1, vehicle body 2, folding connecting rod 3, front fork 4, V font folding hand 5, front-wheel 6, trailing wheel 7 and driver train 8.

Described side arm 1 comprises front head tube 11, down tube 12, the first engaging lug 13 and the second engaging lug 14, described down tube 12 is that the rectangular tube at oblique angle is in the same way cut at a two, the front end of described down tube 12 upper and lower surfaces has all rushed arc opening, the front end of described down tube 12 is welded in the lower end of described front head tube 11, the first described engaging lug 13 of rear end welding of described down tube 12, the second described engaging lug 14 is welded in the top of described down tube 12 and described front head tube 11 welds, the first described engaging lug 13 and the second described engaging lug 14, there is a mutual flute profile blanked part to perforation the two sides that are all flute profile.

Described vehicle body 2 comprises main part 21, bearing inserts 22, clutch shaft bearing 23, the second bearing 24 and back vent 25, described main part 21 is slice processing parts of aluminium extruded type, the forward lower comer of described main part 21 has the circle hole of 8 millimeters of φ, claim the first hole 211, there is the circular hole of 102 millimeters of φ at the middle part of described main part 21, claim the second hole 212, the circular hole that the coherent φ in the rear in described main part 21 second holes 212 is 32 millimeters, claim the 3rd hole 213, described main part 21 second holes 212 and the 3rd hole 213 right flanks are around, also there are several tapped bore in branch, there is the circular hole of 18 millimeters of φ the front upper place in described main part the second hole 212, claim the 4th hole 214, there is the circular hole of 8 millimeters of φ the back upper place in main part the 4th hole 214, claim the 5th hole 215, the rear in main part the 3rd hole is the circular hole of 8 millimeters of two φ in tandem, claim the 6th hole 216 and seven apertures in the human head 217, front portion and rear portion at described main part 21, also be distributed with auxiliary hole, described bearing inserts 22 is that front portion is an annular arrangement, rear portion is that the modification of a tubular strengthens nylon part, the diameter of described bearing inserts 22 annulus is corresponding with the aperture in described main part 21 second holes 212, the caliber of described bearing inserts 22 pipes is corresponding with the aperture in described main part 21 the 3rd hole 213, the inner diameter hole of described bearing inserts 22 annulus is that left side is through hole, right side is counterbore, there is the jump-ring slot that can inlay interior jump ring in the aperture of described bearing inserts 22 annulus counterbores, the internal diameter of described bearing inserts 22 annulus counterbores is corresponding with the external diameter of described clutch shaft bearing 23, the inner diameter hole of described bearing inserts 22 pipes is that left head and right head are all counterbores, middle part is through hole, the internal diameter of described bearing inserts 22 pipe two counterbores is corresponding with the external diameter of the second described bearing 24, the rear end of the periphery on the right side of described bearing inserts 22 annulus and described bearing inserts 22 pipes, also be connected with several ears that connect, on ear, there is earhole, the several earholes that connect on ear of described bearing inserts 22 are corresponding with several tapped bore of the surrounding of described main part 21 second holes 212 and the 3rd hole 213 right flanks, described bearing inserts 22 is connected in right side in 212 holes, described main part 21 second hole and the right side in 213 holes, the 3rd hole by several bolts, described clutch shaft bearing 23 is that external diameter is 85 millimeters of φ, internal orifice dimension is the deep groove ball bearing of 65 millimeters of φ, described clutch shaft bearing 23 is embedded in the counterbore of described bearing inserts 22 annulus, and with an interior jump ring, snap in the jump-ring slot of described bearing inserts 22 annulus counterbores, the second described bearing 24 is that external diameter is 24 millimeters of φ, internal orifice dimension is the deep groove ball bearing of 12 millimeters of φ, the second bearing 24 described in two is embedded in the counterbore at described bearing inserts 22 pipe two, described back vent 25 is that lateral surface is that circular arc is thrown face, medial surface is with the workpiece of the Al squeezing material of shallow slot, the front middle part corrugate of described back vent 25 is crooked, described back vent 25 is two and becomes symmetrical shape, the anterior front and rear row of described back vent 25 wavy bendings is shown the circular hole of 8 millimeters of two φ, the shallow slot of described back vent 25 is corresponding with the rear portion of described main part 21, there is the notch of U-shaped two rear ends of described back vent 25, described back vent 25 is fixedly connected on the 6th hole 216 and seven apertures in the human head 217 of described main part 21 by two pairs of lock bolts, and be positioned at the left and right sides at described main part 21 rear portions, the first hole 211 of described main part 21 is by being connected boring a hole to rotate lock bolt and described the first engaging lug 13.

Described folding connecting rod 3 comprises front rod 31, rear linking rod 32, snap close 33, little spring 34 and ball-headed bolt 35, described front rod 31 is that the below at front end and rear portion respectively strengthens nylon rod like parts with the modification of a cross-perforating, there is a upper and lower through slotted hole at the rear portion of described front rod 31, the bottom of described front rod 31 slotted holes is connected with the depression of flute profile, snap close 33 and little spring 34 are installed in the slotted hole of described front rod 31, described snap close 33 is by push button, locking plate and tie bolt form, push button is that the front portion of oval sheet bottom surface has the outstanding Plastic Parts of a square-tube-shaped, the outstanding square-tube-shaped of push button is put into the rear end of front rod slotted hole downwards, again little spring 34 is put into from bottom to top to the slotted hole of described front rod 31, and the front end in the outstanding square-tube-shaped of push button and described front rod 31 slotted holes is being hanged down at the two that makes little spring 34, again locking plate is combined on the outstanding square-tube-shaped of push button, with tie bolt, penetrate in the hole of locking plate, and be fastened in the pore of the outstanding square-tube-shaped of push button, make little spring 34 be positioned the front portion of locking plate, in the front portion of push button and the slotted hole of front rod, locking plate is slided in the groove-shaped depression of bottom of described front rod 31 slotted holes, the front perforation of described front rod 31 is by being rotationally connected lock bolt and described the second engaging lug 14, the rear perforation of described front rod 31 is by being rotationally connected the engaging lug of lock bolt and described rear linking rod 32 front ends, described rear linking rod 32 is parts that an engaging lug is respectively welded at the two ends of a rectangular tube, it is one mutual to perforation that the two sides of described rear linking rod 32 front and back end two engaging lugs respectively have, the top of described rear linking rod 32 rectangular tube front ends is twisted and is connect a ball-headed bolt 35, the engaging lug of described rear linking rod 32 rear ends is by being rotationally connected the 5th hole 215 of lock bolt and described main part 21, the ball-headed bolt 35 of described rear linking rod 32 tops can be connected to described snap close 33 interlockings on described front rod 31.

Described front fork 4 comprises Y-piece and front fork tube, Y-piece is that circular arc is thrown face by two sections of lateral surfaces, medial surface is with the workpiece of the Al squeezing material of shallow slot, be welded with a cast aluminum component, there is the notch of U-shaped two lower ends of Y-piece, the lower end close-fitting socket of the circle hole of Y-piece cast aluminum component and front fork tube, front fork tube is the threaded pipe in top, described front fork 4 is rotatably connected by seven bowls and described front head tube 11, described front-wheel 6 is installed in the U-lag mouth of 4 liang of lower ends of described front fork, described front-wheel 6 is 6 inches of wheels, in the U-lag mouth of two rear ends of the back vent 25 described in described trailing wheel 7 is installed on, described trailing wheel 7 is 8 inches of wheels.

Described V font folding hand, 5, comprises handgrip pedestal 51, inside extending tube, U-lag plastic lining 52, the left part 531 that connects, the right part 532 that connects, left hand is 541, right handgrip 542, to lock bolt 55, left lock-connecting piece 561, right lock-connecting piece 562, hole cylinder 57, quick detach 58, safety catch 59, described handgrip pedestal 51, is Intermediate Gray one circular hole, both sides are respectively with flute profile, two flute profiles are cut off workpiece near the both sides inner side of bottom land with the Al squeezing material of convex tendon, each is mutual to perforation with one for two side lower parts of 51 liang of flute profiles of described handgrip pedestal, one tapped bore is arranged at the top of described handgrip pedestal 51 the right groove rear sides, inside extending tube described in the bottom close-fitting socket one of described handgrip pedestal 41 circular holes, described U-lag plastic lining 52 is that upper middle part is U-lag, bottom is flat-bottom slot, the both sides of flat-bottom slot are with mutually to the Plastic Parts of boring a hole, and two outsides of described U-lag plastic lining 52 are respectively with sulculus, and described in two, the sulculus of U-lag plastic lining 52 is corresponding to the convex tendon in handgrip pedestal 51 flute profiles described in two, and be pushed in the flute profile of handgrip pedestal 51 described in two, by U-lag plastic lining 52 bottoms described in two to perforation corresponding to 51 liang of flute profile both sides of handgrip pedestal described in two to perforation, the U-lag of described U-lag plastic lining 52 and described left hand 541 and the caliber of described right handgrip 542 match.

Described left part 531 and the described right part 532 that connects of connecting, it is the workpiece of the Al squeezing material section of a bottom zone circle shape, described left part 531 and the described right top that connects part 532 of connecting, the cylinder that has a Vehicle Processing to form, described left part 531 and the described right cylinder that connects part 532 of connecting, respectively fixedly sleeved in described left hand 541 and the bottom of described right handgrip 542, described left hand is equipped with a pin 541 with the described left socket place that connects part 531, described right handgrip 542 is equipped with a pin with the described right socket place that connects part 532, described left hand 541 and described right handgrip 542 be that top is crooked backward, described in two to lock bolt 55, by described left connect part 531 and described right connect part 532 be rotationally connected with respectively described pedestal 51 flute profile two side lower parts in boring a hole, with U-lag plastic lining 52 bottoms described in two to perforation in.

Described left lock-connecting piece 561, it is one one-tenth flute profile, the both sides of flute profile with mutual to wearing the aluminum component of circular hole, described left lock-connecting piece 561 is welded in described left hand the rear side of 541 bottoms, described right lock-connecting piece 562, it is the sliced pieces of the Al squeezing material of an Intermediate Gray U-lag, described right lock-connecting piece 562 is welded in the rear side of described right handgrip 542 bottoms, the U-lag of described right lock-connecting piece 562 is corresponding with the flute profile of described left lock-connecting piece 561, described hole cylinder 57, the side that is a metal cylinder has a pair of perforation, described hole cylinder 57 penetrate described left lock-connecting piece 561 up and down to wearing in circular hole, and mutual to wearing circular hole normal-running fit with described left lock-connecting piece 561, described quick detach 58 is by a circle hook bolt, fast dismounting handle, pad, spring and Anti-slip nut form, eccentric orfice on described fast dismounting handle is rotationally connected by rivet and described circle hook bolt, described circle hook bolt penetrates described pad, penetrate again in a spring, penetrate be again connected in described left lock-connecting piece Shang Xia 561 57 sides of the hole cylinder in circular hole to perforation in, and be arranged in the groove of described left lock-connecting piece 561, and then screw in described Anti-slip nut, described quick detach 58 interlockings are in the U-lag of described right lock-connecting piece 562, described safety catch 59 is the Plastic Parts with U-shaped card, connecting bore is arranged at the bottom of described safety catch 59 U-shaped cards, the connecting bore of described safety catch 59 is bolted in the tapped bore of the rear upper lateral part of described handgrip pedestal 51 the right grooves, the U-shaped card of described safety catch 59 is corresponding with the fast dismounting handle of described quick detach 58, and engaging.

Described driver train 8 comprises fix shaft 81, treadle 821, engaging lug 822, step 823, pendulum 83, crankshaft toothed gear 84, rear class gear 85, countershaft 86, sprocket wheel 87, flywheel 88 and chain 89, described fix shaft 81 middle parts are with the axle of straight-tooth annular knurl, a tapped bore is respectively with at the center of described fix shaft 81 two ends end points, the straight-tooth annular knurl close-fitting at described fix shaft 81 middle parts is fixedly pressed in the 4th hole 214 of described main part 21, described crankshaft toothed gear 84 is by gear 841, bent axle 842 in flakes, two nuts and two flat machine bolts form, described gear 841 is that the modification of two mould 40 octadentates strengthens nylon gear, there are two hexagonal counterbores on the left side of described gear 841, two hexagonal counterbores of described gear 841 respectively connect a through hole to the right, on described gear 841, also has a crankshaft hole, there are two circles on the right side of described gear 841 through giving prominence to for the semi-cylindrical of 65 millimeters of φ, groove between the two semicircular cylindricality of described gear 841 is corresponding with the external diameter of described 842 round steel of bent axle in flakes, in two hexagonal counterbores of described gear 841, respectively embed a nut, described bent axle in flakes 842, that a round steel is bent into zigzag, described bent axle in flakes 842 is again welded the round steel of zigzag and circular punching, the center of the described 842 zigzag round steel two ends end points of bent axle in flakes respectively has a tapped bore, in the circular punching of described bent axle in flakes 842, there are two hole and holes of wearing bent axle of wearing bolt, the two semicircular cylindricality of described gear 84 is given prominence to and penetrated to the right in the interior circular hole of described clutch shaft bearing 23, the left end of described bent axle in flakes 842 is penetrated to the crankshaft hole of described gear 841 left and wins left, and the zigzag round steel of described bent axle in flakes 842 is closed up corresponding to the columniform groove of described gear 841 two halves simultaneously, with two flat machine bolts, penetrate left and wear in the hole of bolt and in two through holes of described gear 841 in two of the described 842 circular punchings of bent axle in flakes again, again with embed nut in two hexagonal counterbores of described gear 841 and twist and connect, described treadle 821 is metal tubes of each vertical welding Yi Duan garden, front and back end pipe, in the short Circular Tube With Hole of described treadle 821 rear ends, be tapping into tapped bore, the bottom surface of described treadle 821 front portions is welded with engaging lug 822, described engaging lug 822 is that bottom is with the mutual flute profile stamping to perforation, described treadle about 821 minutes two, step described in two is fastened to about 823 minutes in the tapped bore of treadle 821 rear ends described in two, the front pore of treadle 821 and two of described fix shaft 81 socket that rotates described in two, then in the tapped bore at described fix shaft 81 two ends, each coordinates the stubborn wherein location that connects of a pad with a bolt, pendulum 83 described in two by two pairs lock bolts be rotationally connected with engaging lug described in two 822 to perforation in, described pendulum 83 is aluminium extruded type sliced pieces of 8-shaped, in two holes of 8 word slices, each Inlaid mono-bearing forms, two of bent axle 842 in flakes described in pendulum 83 described in two is socketed on respectively, then in the tapped bore at described bent axle in flakes 842 two ends, each is twisted and connects wherein location with a bolt, described rear class gear 85 is aluminium extruded type gears of two mould ten bidentates, the axle center hole of described rear class gear 85 is the tapped bore of anti-tooth, described countershaft 86 right-hand members are fixedly connected with described sprocket wheel 87, described sprocket wheel 87 is sprocket wheels of four minutes 21 teeth, the left head of described countershaft 86, there is the anti-pitch thread corresponding with the tapped bore of described rear class gear 85, described countershaft 86 penetrates from right to left in the endoporus of the second bearing 24 described in two, twist and connect with the tapped bore of described rear class gear 85 again, described rear class gear 85 and 84 engagements of described crankshaft toothed gear, described flywheel 88 is arranged on described trailing wheel 7, described flywheel 88 is flywheels of four minutes ten bidentates, on sprocket wheel 87 described in described chain 89 is wire-wrapped in and described flywheel 88.

Claims

1. a fast folding portable scooter, comprise side arm, vehicle body, folding connecting rod, front fork, V font folding hand handle, front-wheel, trailing wheel and driver train, it is characterized in that: side arm comprises front head tube, down tube, the first engaging lug and the second engaging lug, down tube is a rectangular tube, the first engaging lug is welded in the rear end of down tube, the front end of down tube is welded in the lower end of front head tube, and the second engaging lug is welded in the top of down tube and front head tube weld, vehicle body comprises main part, bearing inserts, clutch shaft bearing, two the second bearings and back vent, main part is the slice processing part of aluminium extruded type, the forward lower comer of main part has the first hole, there is the second hole at the middle part of main part, the rear in main part the second hole links up the 3rd hole, there is the 4th hole the front upper place in main part the second hole, the 5th hole, back upper place in main part the 4th hole, there is tandem the 6th hole and seven apertures in the human head at the rear in main part the 3rd hole, bearing inserts is that modification enhancing nylon is made, in bearing inserts, inlay clutch shaft bearing and two the second bearings, bearing inserts is installed on the right side in main part the second hole and the 3rd hole, back vent is fixedly connected on the 6th hole and seven apertures in the human head of main part by two pairs of lock bolts, and be positioned at the left and right sides at main part rear portion, the first hole of main part is by rotating and be connected with the first engaging lug lock bolt, folding connecting rod comprises front rod, rear linking rod, snap close, little spring and ball-headed bolt, front rod is that the below at front end and rear portion is respectively with the plastics rod like parts of a cross-perforating, there is a upper and lower through slotted hole at the rear portion of front rod, snap close and little spring are installed in the slotted hole of front rod, the front perforation of front rod is by being rotationally connected lock bolt and the second engaging lug, the rear perforation of front rod is by being rotationally connected the engaging lug of the front end of lock bolt and rear linking rod, rear linking rod is the parts that an engaging lug is respectively welded at the two ends of a rectangular tube, the top of rear linking rod rectangular tube front end is twisted and is connect a ball-headed bolt, the engaging lug of rear linking rod rear end is by being rotationally connected the 5th hole of lock bolt and main part, the ball-headed bolt of rear linking rod top can be by the snap close interlocking on front rod, front fork is rotationally connected by seven bowls and front head tube, front-wheel is installed on front fork, V font folding hand handle is fixedly connected with the front fork tube of front fork, trailing wheel is installed on back vent, driver train comprises fix shaft, treadle, engaging lug, step, pendulum, crankshaft toothed gear, rear class gear, countershaft, sprocket wheel, flywheel and chain, crankshaft toothed gear is by gear, bent axle in flakes, two nuts and two flat machine bolts form, gear is that modification enhancing nylon is made, there are two hexagonal counterbores on the left side of gear, each connects a through hole to the right two hexagonal counterbores, on gear, also has a crankshaft hole, the right side of gear has two halves columniform outstanding, groove between two semicircular cylindricality is corresponding with the external diameter of bent axle round steel in flakes, in two hexagonal counterbores of gear, respectively embed a nut, bent axle is that a round steel is bent into zigzag in flakes, again with circular punching welding, respectively there is a tapped bore at the center of bent axle zigzag round steel two ends end points in flakes, in the circular punching of bent axle, there are in flakes two hole and holes of wearing bent axle of wearing bolt, by columniform outstanding the penetrating to the right in the interior circular hole of clutch shaft bearing of gear two halves, the left end of bent axle is in flakes penetrated to the crankshaft hole of gear left and wins left, and the zigzag round steel of bent axle is in flakes closed up corresponding to the columniform groove of gear two halves simultaneously, with two flat machine bolts, penetrate left and wear in the hole of bolt and in two through holes of gear in two of the circular punching of bent axle in flakes again, again with embed nut in two hexagonal counterbores of gear and twist and connect, the 4th hole of fix shaft and main part is fixed, two of two treadles and fix shaft socket that rotates, two steps are installed on the rear end of two treadles, two engaging lugs are welded in below two treadle front portions, two pendulums are rotationally connected two engaging lugs, two pendulums are rotationally connected with respectively two of bent axle in flakes, rear class gear is arranged in the endoporus of two second bearings by countershaft, sprocket wheel and countershaft are fixed, flywheel is arranged on trailing wheel, chain is wire-wrapped on sprocket wheel and flywheel.

2. fast folding portable scooter according to claim 1, it is characterized in that: described down tube is that the rectangular tube at oblique angle is in the same way cut at a two, the front end of described down tube upper and lower surface has all rushed arc opening, the first described engaging lug and the second described engaging lug are all that the two sides of flute profile have a mutual flute profile blanked part to perforation.

3. fast folding portable scooter according to claim 1, it is characterized in that: there is circular hole, title the second hole of 102 millimeters of φ at the middle part of described main part, the circular hole that the coherent φ in the rear in described main part the second hole is 32 millimeters, claim the 3rd hole, described main part the second hole and the 3rd hole right flank are around, also there are several tapped bore in branch, front portion and rear portion at described main part, be also distributed with auxiliary hole.

4. fast folding portable scooter according to claim 1, it is characterized in that: described bearing inserts is that front portion is an annular arrangement, rear portion is that the modification of a tubular strengthens nylon part, the diameter of described bearing inserts annulus is corresponding with the aperture in described main part the second hole, the caliber of described bearing inserts pipe is corresponding with the aperture in described main part the 3rd hole, the inner diameter hole of described bearing inserts annulus is that left side is through hole, right side is counterbore, there is the jump-ring slot that can inlay interior jump ring in the aperture of described bearing inserts annulus counterbore, the internal diameter of described bearing inserts annulus counterbore is corresponding with the external diameter of described clutch shaft bearing, the inner diameter hole of described bearing inserts pipe is that left head and right head are all counterbores, middle part is through hole, the internal diameter of described bearing inserts pipe two counterbores is corresponding with the external diameter of the second described bearing, the rear end of the periphery on the right side of described bearing inserts annulus and described bearing inserts pipe, also be connected with several ears that connect, on ear, there is earhole, the several earholes that connect on ear of described bearing inserts are corresponding with several tapped bore of the surrounding of described main part the second hole and the 3rd hole right flank, described bearing inserts is connected in described main part the second Kong Zhong right side, hole and the 3rd Kong Zhong right side, hole by several bolts, described clutch shaft bearing is that external diameter is 85 millimeters of φ, internal orifice dimension is the deep groove ball bearing of 65 millimeters of φ, described clutch shaft bearing is embedded in the counterbore of described bearing inserts annulus, and with an interior jump ring, snap in the jump-ring slot of described bearing inserts annulus counterbore, the second described bearing is that external diameter is 24 millimeters of φ, internal orifice dimension is the deep groove ball bearing of 12 millimeters of φ, the second bearing described in two is embedded in the counterbore at described bearing inserts pipe two.

5. fast folding portable scooter according to claim 1, it is characterized in that: described back vent is one side is circular arc throwing face, the another side workpiece with the Al squeezing material of shallow slot, the front middle part corrugate of described back vent is crooked, described back vent is two and becomes symmetrical shape, the anterior front and rear row of the wavy bending of described back vent is shown the circular hole of 8 millimeters of two φ, the shallow slot of described back vent is corresponding with the rear portion of described main part, and there is the notch of U-shaped two rear ends of described back vent.

6. fast folding portable scooter according to claim 1, it is characterized in that: the bottom of described front rod slotted hole is connected with the depression of flute profile, described snap close is by push button, locking plate and tie bolt form, push button is that the front portion of oval sheet bottom surface has the outstanding Plastic Parts of a square-tube-shaped, the outstanding square-tube-shaped of push button is put into the rear end of front rod slotted hole downwards, again little spring is put into from bottom to top to the slotted hole of described front rod, and the front end in the outstanding square-tube-shaped of push button and described front rod slotted hole is being hanged down at the two that makes little spring, again locking plate is combined on the outstanding square-tube-shaped of push button, with tie bolt, penetrate in the hole of locking plate, and be fastened in the pore of the outstanding square-tube-shaped of push button, make little spring be positioned the front portion of locking plate, in the front portion of push button and the slotted hole of front rod, locking plate is slided in the groove-shaped depression of bottom of described front rod slotted hole.

7. fast folding portable scooter according to claim 1, it is characterized in that: described front fork comprises Y-piece and front fork tube, Y-piece is that circular arc is thrown face, medial surface with the workpiece of the Al squeezing material of shallow slot by two sections of lateral surfaces, be welded with a cast aluminum component, there is the notch of U-shaped two lower ends of Y-piece, the lower end close-fitting socket of the circle hole of Y-piece cast aluminum component and front fork tube, described front-wheel is 6 inches of wheels, described trailing wheel is 8 inches of wheels.

8. fast folding portable scooter according to claim 1, is characterized in that: described V font folding hand handle, comprises handgrip pedestal, inside extending tube, U-lag plastic lining, the left part that connects, the right part that connects, left hand handle, right handgrip, to lock bolt, left lock-connecting piece, right lock-connecting piece, hole cylinder, quick detach, safety catch, described handgrip pedestal, is Intermediate Gray one circular hole, each Al squeezing material with flute profile of both sides cuts off workpiece, each is mutual to perforation with one for two side lower parts of described handgrip pedestal two flute profiles, inside extending tube described in the bottom close-fitting socket one of described handgrip pedestal circular hole, by U-lag plastic lining bottom described in two to perforation corresponding to the two flute profile both sides of handgrip pedestal described in two to perforation, described left part and the described right cylinder that connects part of connecting, fixedly sleeved in the bottom of described left hand handle and described right handgrip respectively, described in two to lock bolt, by described left connect part and described right connect part be rotationally connected with respectively described bottom, pedestal flute profile both sides in perforation, with U-lag plastic lining bottom described in two to perforation in, described left lock-connecting piece is welded in described left hand the rear side of bottom, described right lock-connecting piece is welded in the rear side of described right handgrip bottom.

9. fast folding portable scooter according to claim 1, it is characterized in that: described fix shaft middle part is with the axle of straight-tooth annular knurl, the straight-tooth annular knurl close-fitting at described fix shaft middle part is fixedly pressed in the 4th hole of described main part, described gear is that the modification of two mould 40 octadentates strengthens nylon gear, described treadle is the metal tube of each vertical welding Yi Duan garden, front and back end pipe, in the short Circular Tube With Hole of described treadle rear end, be tapping into tapped bore, described engaging lug is that bottom is with the mutual flute profile stamping to perforation, described pendulum is the aluminium extruded type sliced pieces of 8-shaped, in two holes of 8 word slices, each Inlaid mono-bearing forms, described rear class gear is the aluminium extruded type gear of two mould ten bidentates, the axle center hole of described rear class gear is the tapped bore of anti-tooth, described countershaft right-hand member is fixedly connected with described sprocket wheel, described sprocket wheel is the sprocket wheel of four minutes 21 teeth, described countershaft penetrates from right to left in the endoporus of the second bearing described in two, twist and connect with the tapped bore of described rear class gear again, described rear class gear and the engagement of described crankshaft toothed gear, described flywheel is the flywheel of four minutes ten bidentates.