CN203780704U - Steel-plastic skillful-use folding portable pedal-sliding bicycle - Google Patents

Abstract

The utility model discloses a steel-plastic skillful-use folding portable pedal-sliding bicycle which comprises a front frame, a bicycle body, a folding connection rod, a front fork, a V-shaped folding handle, a front wheel, a rear wheel and a driving mechanism, wherein the front frame is provided with a first connection lug, a second connection lug and a front head pipe; the bicycle body comprises a frame, a bearing embedding piece, a first bearing and a second bearing; the frame is provided with a beam pipe, a fixed frame, a positioning shaft, a first round pipe, a second round pipe, a rear fork and a reinforcement sheet; the bearing embedding piece together with the first bearing and the second bearing is connected with the frame; the first round pipe is connected with the second connection lug; the folding connection rod is connected with the first connection lug and the second round pipe; the front fork is connected with the front head pipe, the V-shaped folding handle and the front wheel; the rear wheel is connected to the rear fork; a crankshaft gear is mounted on the first bearing; a pedal rod is arranged on a positioning shaft in a sleeving manner and is connected with the connection lugs and a pedal; a swing sheet is connected with the connection lugs and the crankshaft gear; an auxiliary shaft is connected with a chain wheel and a rear-stage gear; flywheels are mounted on the rear wheel; a chain is connected around the chain wheel and the flywheels.

Description

Steel is moulded the folding portable type scooter of skilful use

Technical field

The present invention relates to the scooter that a kind of bipod is stood and ridden, particularly a kind of steel is moulded the folding portable type scooter of skilful use.

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.

Summary of the invention

The object of the invention is will be on the basis of original Quick-folding portable pedal bike, design a kind of folding and launch more quick, carry steel more easily and mould the folding portable type scooter of skilful use.The object of the present invention is achieved like this: steel is moulded the folding portable type scooter of skilful use, 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 vehicle frame, bearing inserts, clutch shaft bearing and two the second bearings, vehicle frame is by beam pipe, fixed mount, fix shaft, the first pipe, the second pipe, strengthen band steel, back vent and reinforced sheet form, the top of beam pipe is welded and fixed frame, the front end of beam pipe welds the first pipe, on the rear end of beam pipe, weld back vent, and be welded in fixed mount with reinforced sheet, between beam pipe and back vent, reinforce, the front upper place welding fix shaft of fixed mount, the second pipe is welded in the back upper place of fix shaft, strengthening band steel is welded to connect successively in the first pipe, beam pipe, fix shaft, on the second pipe and on fixed mount, bearing inserts is that modification enhancing nylon is made, in bearing inserts, inlay clutch shaft bearing and two the second bearings, bearing inserts is fixedly installed in the framework of fixed mount and beam pipe welding formation, the first pipe of vehicle frame 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 second pipe of lock bolt and vehicle frame, 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 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, 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 invention has the beneficial effects as follows: adopt side arm to be rotationally connected vehicle frame, folding connecting rod is rotationally connected side arm and vehicle frame, make the present invention folding quick, and simple structure again, intensity is high again, vehicle frame adopts beam pipe and fixed mount as main body, then weld the first pipe, fix shaft, the second pipe, again with strengthening band steel connection reinforcement, be fixedly connected with bearing inserts, and whole car body materials are less again, make material of the present invention select upper scope wider, can adopt iron, the material that aluminium and corrosion-resistant steel etc. are different, adopt bearing inserts that clutch shaft bearing and the second bearing are fixed on vehicle frame, make vehicle frame 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 invention

Fig. 2 is the synthetic left view of vehicle body of the present invention and part driver train

Fig. 3 is the synthetic right elevation of vehicle body of the present invention and part driver train

Fig. 4 is the constructional drawing of folding connecting rod of the present invention

Fig. 5 is vehicle body folding process schematic diagram of the present invention

Fig. 6 is the folding complete design sketch of the present invention

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---vehicle frame, and 22---bearing inserts, 23---clutch shaft bearing, 24---the second bearing; On vehicle frame 21, also include: 211---beam pipe, 212---fixed mount, 213---fix shaft, 214---the first pipe, 215---the second pipe, 216---strengthen band steel, 217---back vent, 218---reinforced sheet; 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---treadle, and 811---engaging lug, 82---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 steel is moulded the folding portable type scooter of skilful use, 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 vehicle frame 21, bearing inserts 22, clutch shaft bearing 23 and the second bearing 24, described vehicle frame 21 comprises: beam pipe 211, fixed mount 212, fix shaft 213, the first pipe 214, the second pipe 215, strengthen band steel 216, back vent 217 and reinforced sheet 218, described beam pipe 211 is rectangular tubes, the left and right sides of described beam pipe 211 front ends is with arc opening, the described fixed mount 212 of top welding of described beam pipe 211, the first described pipe 214 of arc opening welding of described beam pipe 211 front ends, the described back vent 217 of top welding of described beam pipe 211 rear ends, described fixed mount 212 is that a flat bar metal crimping becomes angle bar shape, at angle bar shape one bends to semicircle again, the flanging of described fixed mount 212 is positioned at right flank, on the right flank flanging of described fixed mount 212, be uniformly distributed several circular holes, two of described fixed mount 212 is welded in the top of described beam pipe 211, described reinforced sheet 218 is with sheetmetal, to strike out the stamping of U-lag shape, the two sides of described reinforced sheet 218 front ends acutangulate, there is arc opening the two sides of described reinforced sheet 218 front ends, described reinforced sheet 218 is welded in the rear end of described fixed mount 212, the top of described beam pipe 211 rear ends and the front end of described back vent 217, described fix shaft 213 is that middle part is thick, the columniform axle that two is slightly thin, a tapped bore is respectively with at the center of described fix shaft 213 two ends end points, the middle part of described fix shaft 213 becomes horizontal welding with the front upper place of described fixed mount 212, the first described pipe 214 and the second described pipe 215 are all the seamless metal pipes of 8 millimeters of endoporus φ, the back upper place of fix shaft 213 described in the second described pipe 215 horizontal welding, described reinforcement band steel 216 is the flat metals of a bar shaped, described reinforcement band steel 216 cambers are crooked, the front end of described reinforcement band steel 216 and described the first pipe 214 and described beam pipe 211 welding, the postmedian of described reinforcement band steel 216 and described fix shaft 213 and the second described pipe 215 welding welding, the rear end of described reinforcement band steel 216 and 212 welding of described fixed mount, described back vent 217 is that a pipe curves U-bend song, at two of described back vent 217 U-shapeds, pipe is rushed flat again, rushing open slot forms, the first pipe 214 of described vehicle frame 21 is by being connected boring a hole to rotate lock bolt and described the first engaging lug 13.

Described bearing inserts 22 is that a modification strengthens nylon part, described bearing inserts 22 anterior one-tenth one annular arrangements, acutangulate backward shape, the middle part of described bearing inserts 22 has a tubular protruding to the right, the external diameter of described bearing inserts 22 annulus becomes the internal diameter of semicircle corresponding with described fixed mount 212 angle bar sigmoids, on the annulus of described bearing inserts 22 He on acute angle shape, there are several horizontal perforation, the left side of described bearing inserts 22 several cross-perforatings is connected with hexagonal counterbore, in several hexagonal counterbores of described bearing inserts 22, be bumped into nut, the cross-perforating of described bearing inserts 22 is corresponding with several circular holes of described fixed mount 212 right flanks, described bearing inserts 22 is put into described fixed mount 212 from left to right, with several bolts, penetrate from right to left in several circular holes of described fixed mount 212 right flanks again, in the cross-perforating of described bearing inserts 22, and be bumped into nut in several hexagonal counterbores of described bearing inserts 22 and twist and connect, the inner diameter hole of described bearing inserts 22 annulus is that left side is through hole, right side is counterbore, 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 tubulars is that left head and right head are all counterbores, middle part is through hole, the internal diameter of described bearing inserts 22 tubular two counterbores is corresponding with the external diameter of the second described bearing 24, 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, 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 tubular two.

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 second pipe 215 of lock bolt and described vehicle frame 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 by the workpiece of two sections of round metal tubes, be welded with a cast metal piece, the notch of U-shaped is flattened and rushed in two lower ends of described Y-piece, the lower end close-fitting socket of the circle hole of Y-piece cast metal piece and front fork tube, front fork tube is the threaded metal circular tube 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, described trailing wheel 7 is installed in the open slot at described back vent 217 two, 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 treadle 81, engaging lug 811, step 82, pendulum 83, crankshaft toothed gear 84, rear class gear 85, countershaft 86, sprocket wheel 87, flywheel 88 and chain 89, 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 81 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 81 rear ends, be tapping into tapped bore, the bottom surface of described treadle 81 front portions is welded with engaging lug 811, described engaging lug 811 is that bottom is with the mutual flute profile stamping to perforation, described treadle about 81 minutes two, step described in two is fastened to about 82 minutes in the tapped bore of treadle 81 rear ends described in two, the front pore of treadle 81 and two of described fix shaft 213 socket that rotates described in two, then in the tapped bore at described fix shaft 213 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 811 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 (9)

1. a steel is moulded the folding portable type scooter of skilful use, 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 vehicle frame, bearing inserts, clutch shaft bearing and two the second bearings, vehicle frame is by beam pipe, fixed mount, fix shaft, the first pipe, the second pipe, strengthen band steel, back vent and reinforced sheet form, the top of beam pipe is welded and fixed frame, the front end of beam pipe welds the first pipe, on the rear end of beam pipe, weld back vent, and be welded in fixed mount with reinforced sheet, between beam pipe and back vent, reinforce, the front upper place welding fix shaft of fixed mount, the second pipe is welded in the back upper place of fix shaft, strengthening band steel is welded to connect successively in the first pipe, beam pipe, fix shaft, on the second pipe and on fixed mount, bearing inserts is that modification enhancing nylon is made, in bearing inserts, inlay clutch shaft bearing and two the second bearings, bearing inserts is fixedly installed in the framework of fixed mount and beam pipe welding formation, the first pipe of vehicle frame 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 second pipe of lock bolt and vehicle frame, 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 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, 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. steel according to claim 1 is moulded the folding portable type scooter of skilful use, 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. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it is characterized in that: described beam pipe is a rectangular tube, the left and right sides of described beam pipe front end is with arc opening, described fixed mount is that a flat bar metal crimping becomes angle bar shape, at angle bar shape one bends to semicircle again, the flanging of described fixed mount is positioned at right flank, on the right flank flanging of described fixed mount, be uniformly distributed several circular holes, two of described fixed mount is welded in the top of described beam pipe, described reinforced sheet is with sheetmetal, to strike out the stamping of U-lag shape, the two sides of described reinforced sheet front end acutangulate, there is arc opening the two sides of described reinforced sheet front end, described reinforced sheet is welded in the rear end of described fixed mount, the top of described beam pipe rear end and the front end of described back vent, described fix shaft is that middle part is thick, the columniform axle that two is slightly thin, a tapped bore is respectively with at the center of described fix shaft two ends end points, the first described pipe and the second described pipe are all the seamless metal pipes of 8 millimeters of endoporus φ, described reinforcement band steel is the flat metal of a bar shaped, described reinforcement band steel camber is crooked, described back vent is that a pipe curves U-bend song, at two of described back vent U-shaped, pipe is rushed flat again, rushing open slot forms.

4. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it is characterized in that: the described anterior one-tenth of bearing inserts one annular arrangement, acutangulate backward shape, the middle part of described bearing inserts has a tubular protruding to the right, the external diameter of described bearing inserts annulus becomes the internal diameter of semicircle corresponding with described fixed mount angle bar sigmoid, on the annulus of described bearing inserts He on acute angle shape, there are several horizontal perforation, the left side of the several cross-perforatings of described bearing inserts is connected with hexagonal counterbore, in several hexagonal counterbores of described bearing inserts, be bumped into nut, the cross-perforating of described bearing inserts is corresponding with several circular holes of described fixed mount right flank, described bearing inserts is put into described fixed mount from left to right, with several bolts, penetrate from right to left in several circular holes of described fixed mount right flank again, in the cross-perforating of described bearing inserts, and be bumped into nut in several hexagonal counterbores of described bearing inserts and twist and connect, the inner diameter hole of described bearing inserts annulus is that left side is through hole, right side is 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 tubular is that left head and right head are all counterbores, middle part is through hole, the internal diameter of described bearing inserts tubular two counterbores is corresponding with the external diameter of the second described bearing.

5. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it is characterized in that: described clutch shaft bearing is that external diameter is that 85 millimeters of φ, internal orifice dimension are the deep groove ball bearing of 65 millimeters of φ, described clutch shaft bearing is embedded in the counterbore of described bearing inserts annulus, the second described bearing is that external diameter is that 24 millimeters of φ, internal orifice dimension are the deep groove ball bearing of 12 millimeters of φ, and the second bearing described in two is embedded in the counterbore at described bearing inserts tubular two.

6. steel according to claim 1 is moulded the folding portable type scooter of skilful use, 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. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it is characterized in that: described front fork comprises Y-piece and front fork tube, Y-piece is by the workpiece of two sections of round metal tubes, be welded with a cast metal piece, the notch of U-shaped is flattened and rushed in two lower ends of described Y-piece, the lower end close-fitting socket of the circle hole of Y-piece cast metal piece and front fork tube, front fork tube is the threaded metal circular tube in top, described front fork is rotatably connected by seven bowls and described front head tube, described front-wheel is installed in the U-lag mouth of described front fork two lower ends, described front-wheel is 6 inches of wheels, described trailing wheel is installed in the open slot at described back vent two, described trailing wheel is 8 inches of wheels.

8. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it 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. steel according to claim 1 is moulded the folding portable type scooter of skilful use, it is characterized in that: 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.