CN204415635U - The folding upper and lower override type portable bicycle of twin beams saddle interlock - Google Patents

Abstract

The utility model discloses the folding upper and lower override type portable bicycle of a kind of twin beams saddle interlock, comprise twin beams, folded piece, saddle, two flute profiles connect part, side arm, front fork, step, lower link, upper connecting rod, seat pipe, saddle, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, twin beams is by two flat tubes, two crosspieces, bearing seat, connecting leg, fix shaft, left, right back forks piece is welded, twin beams front end is connected folded piece with the rear end of side arm, sliding block joint saddle in the middle part of twin beams, on side arm and seat pipe, each welding flute profile connects part, left and right dropout installs trailing wheel, saddle connects lower link and upper connecting rod, lower link connects part with side arm with the flute profile on seat pipe again with upper connecting rod and is connected, the connection of seat pipe front end and twin beams folded piece, seat pipe rear end connects saddle, front fork is connected with side arm, front-wheel is connected in front fork, V-shaped folding hand handle is connected with front fork, driver train comprises left bent axle, right bent axle, chain wheel, two treadles, two steps, flywheel and chain.

Description

The folding upper and lower override type portable bicycle of twin beams saddle interlock

Technical field

The utility model relates to a kind of Folding Bicycle, particularly the folding upper and lower override type portable bicycle of a kind of twin beams saddle interlock.

Background technology

Folding three-wheeled battery-driven car in the market, do not have the folding three-wheeled battery-driven car that folding rate folds also smaller soon, again, this is due to reasons such as structures, can not reach box promising result after folding.

Utility model content

Utility model object: provide a kind of and adopt that saddle slides in twin beams, linkage bar linkage structure is as the folding upper and lower override type portable bicycle of twin beams saddle interlock of folding mode.

Technical scheme: the folding upper and lower override type portable bicycle of twin beams saddle interlock, comprises twin beams, folded piece, saddle, two flute profiles connect part, side arm, front fork, step, lower link, upper connecting rod, seat pipe, saddle, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, is characterized in that: twin beams comprises two flat tubes, two crosspieces, bearing seat, connecting leg, fix shaft, left back forks piece and right back forks piece, each welding one crosspiece between the front and rear part of two flat tubes, the rear end welding bearing seat of two flat tubes, bearing seat backhand welding is managed in succession, the rear end welding fix shaft of connecting leg, left back forks piece and right back forks piece are welded in the back lower place of bearing seat, and trailing wheel is installed in the rear end of left back forks piece and right back forks piece, the flute profile stamping of the inner side welding folded piece of twin beams two flat tube front end, folded piece is by flute profile stamping, thick-walled tube, latch hook member and torsion spring are formed, thick-walled tube is welded in the bottom of side arm rectangular tube rear end, latch hook member and torsion spring are by being connected to the rear portion of side arm rectangular tube to lock bolt, the flute profile stamping of folded piece is by being rotationally connected lock bolt and thick-walled tube, side arm is welded by front head tube and rectangular tube, rear side in the middle part of front head tube also welds a flute profile and connects part, the middle part sliding block joint saddle of twin beams two flat tube, saddle is made up of lower component and upper-part, the lower component of saddle is rotationally connected the rear end of lower link, the front end of lower link connects part with the flute profile being welded in front head tube and is rotationally connected, the front end of seat pipe is by being rotationally connected locking bolt and two front ends of twin beams and the flute profile stamping of folded piece, the middle part welding flute profile of seat pipe connects part, the rear end of seat pipe connects saddle, the flute profile being welded in a pipe connects the upper end that part is rotationally connected connecting rod, the lower end of upper connecting rod is rotationally connected with the upper-part of saddle, front fork is rotationally connected by seven bowls and front head tube, front-wheel is connected in front fork, V-shaped folding hand handle is fixedly connected with front fork tube, 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 and draw handle, hand is made up of pedestal pedestal moulding and interior poling, interior poling injection moulding is in pedestal moulding, the right and left of pedestal moulding has groove, the right and left top of pedestal moulding is U-lag, bottom is flat-bottom slot, the both sides of pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, hand coordinates pedestal with bowl-type pad by interior poling, hanging bolt and slope nut, be fixedly connected in front fork tube, draw being connected to hand pedestal, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the plagiocephaly barrel of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a plagiocephaly barrel, one round head bolt and a nut are formed, twist in plagiocephaly barrel and connect round head bolt, the stubborn place of connecing of round head bolt and plagiocephaly barrel also twists and connects a nut, the channel of the right lock-connecting piece of lower weld of right handgrip, right lock-connecting piece is by channel, latch hook, to connecting bolt, spring and dowel bolt are formed, the both sides up and down of the flute profile left part of channel have mutual to perforation, a tapped bore is had in the middle part of the flute profile of channel, the upper and lower both sides of channel mutual to perforation by being rotationally connected the collar aperture in the middle part of connecting bolt and latch hook, latch hook is that left end becomes hook-type, there is collar aperture at middle part, the parts of right part band handle, the handle of latch hook there is an elongated hole, spring is positioned between the tapped bore of channel and the elongated hole of latch hook, penetrate with dowel bolt in the elongated hole of latch hook with in spring, be screwed into again in the tapped bore of channel, the cast of left hand handle and the cast of right handgrip, by two to lock bolt, be rotationally connected with respectively pedestal moulding the right and left mutual to perforation, the latch hook of right lock-connecting piece under the action of the spring, hook the round head bolt of left lock-connecting piece and realize interlocking, driver train comprises left bent axle, right bent axle, chain wheel, two treadles, two steps, flywheel and chain, right bent axle is fixedly connected with chain wheel, left bent axle and right bent axle are interconnected in the two bearings endoporus in bearing seat, the rear end of two treadles is socketed on the two ends of fix shaft respectively, treadle is by flat tube, sleeve, barrel and chute are formed, the rear end welded sleeve of flat tube, front end welding barrel, chute is an oblong circle, chute is welded in the rear portion of flat tube, each socket one bearing on the minor axis of left bent axle and right bent axle, left bent axle and right bent axle minor axis head bearing, be slidably connected in the chute at the rear portion of two treadles respectively, two steps are fastened to the front end of two treadles respectively, flywheel is installed on the right side of trailing wheel, on chain solderless wrapped connection and chain wheel and flywheel.

Beneficial effect: the present invention adopts that saddle slides in twin beams, linkage bar linkage structure is as folding mode, after making to open the latch hook member of folded piece, pull the front head tube saddle that can link backward to slide backward, thus interlock seat pipe folds to twin beams together, create the effect that side arm and seat Guan Nengyu Double beam link are folding, improve folding rate and folding effect; Adopt quick interlocking formula V-shaped folding hand handle, make car load folding more quick and effective, respectively be provided with bearing by the right-hand member of the left end of left bent axle and right bent axle, and be slidably connected in the chute at treadle rear portion, such that the driver train of upper and lower override type is simplified, cost reduces.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

Fig. 2 is the constructional drawing of folded piece of the present invention and the connection diagram with side arm.

Fig. 3 is the organigram of saddle of the present invention.

Fig. 4 is that hand of the present invention is the organigram of pedestal.

Fig. 5 is the left bent axle of the present invention and right crankshaft configuration schematic diagram.

Fig. 6 is the folding process schematic diagram of vehicle body of the present invention.

Fig. 7 is that the present invention folds complete figure.

In figure: 1---twin beams, 21---folded piece, 22---saddle, 23---flute profile connects part, and 31---side arm, 32---front fork, 41---lower link, 42---upper connecting rod, 43---seat pipe, 5---saddle, 6---V-shaped folding hand handle, 7---front-wheel, 8---trailing wheel, 9---driver train; Wherein twin beams 1 also comprises: 11---two flat tubes, and 12---crosspiece, 13---bearing seat, 14---connecting leg, 15---fix shaft, 16---left back forks piece, 17---right back forks piece; V-shaped folding hand also comprises 6: 61---hand pedestal, 62---left hand handle, 63---right handgrip, 64---left lock-connecting piece, 65---right lock-connecting piece, 66---draw handle; Driver train 9 also comprises: 91---left bent axle, and 92---right bent axle, 93---chain wheel, 94---treadle, 95---step, 96---flywheel, 97---chain.

Detailed description of the invention

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, the folding upper and lower override type portable bicycle of described twin beams saddle interlock, comprise twin beams 1, folded piece 21, saddle 22, flute profile connect part 23, side arm 31, front fork 32, lower link 41, upper connecting rod 42, seat pipe 43, saddle 5, V-shaped folding hand 6, front-wheel 7, trailing wheel 8 and driver train 9;

Described twin beams 1 comprises two flat tubes 11, crosspiece 12, bearing seat 13, connecting leg 14, fix shaft 15, left back forks piece 16 and right back forks piece 17, two front ends of described two flat tubes 11 respectively have a perforation, the perforation of described two flat tube 11 front ends is mutually corresponding, the crosspiece 12 described in one is respectively welded in two described flat tubes 11 inner side that is anterior and middle part, the rear end welding bearing seat 13 of described two flat tubes 11, described bearing seat 51 is that the double-ended vehicle of one section of pipe pore has the step placing bearing, described bearing seat welds described connecting leg 52 backward, the left and right end of described bearing seat 51 respectively inlays a bearing, the rear end welding fix shaft 53 of described connecting leg 52, described fix shaft 53 is axles that two lathe car of a round steel is little, the center of the two ends end points of described fix shaft 53 has axial tapped bore, left back forks piece 54 and right back forks piece 55 are welded in the back lower place of described bearing seat 51, described left back forks piece 54 is that top is with arc opening, bottom is with the strip metal punching of U-shaped gap, described right back forks piece 55 is the strip metal stampings with two right-angle bendings in the middle part of in the of, the top of right back forks piece 55 is with arc opening, the bottom of right back forks piece 55 is with U-shaped gap, left back forks piece 54 described in after welding with described bearing seat 51 and described right back forks piece 55, forming one with described bearing seat 51 is font, in the U-shaped gap of described left back forks piece 54 and in the U-shaped gap of described right back forks piece 55, trailing wheel 8 is installed, described trailing wheel 8 is inflated wheel of 10 inches.

The flute profile stamping of described folding 21 of the inner side welding of described two flat tube 11 front ends, folded piece 1 is by flute profile stamping, thick-walled tube, latch hook member and torsion spring are formed, the flute profile stamping of described folded piece 21 is the flute profile stampings that Open Side Down, the front and rear of described folded piece 21 flute profile stamping two sides respectively has one mutual to perforation, the flute profile stamping of the described folded piece 21 after welding with described two flat tubes 11, perforation perforation being corresponded to described two flat tube 11 front ends that rear portion is mutual, the thick-walled tube of described folded piece 21 is welded in the bottom of side arm 31 rectangular tube rear end, the latch hook member of described folded piece 11 is middle and upper parts is T-shaped, bottom is the parts of cast, the latch hook member of described folded piece 21 and torsion spring are by being connected to the rear portion of described side arm 31 rectangular tube to lock bolt, the flute profile stamping of described folded piece 21 is by being rotationally connected the thick-walled tube of lock bolt and described folded piece.

Described side arm 31 is formed by upper weld one rectangular tube of front head tube, the left and right sides at described side arm 31 rectangular tube rear portion has mutual to perforation, the top at described side arm 31 rectangular tube rear portion has an elongated hole, both sides, described side arm 31 rectangular tube rear portion mutual to perforation and the elongated hole of top, for latch hook member and torsion spring by installing described folded piece 21 to lock bolt, before described side arm 31, the middle part of head tube is also welded a flute profile and is connected part 23, described flute profile connects the blanked part that part 23 is flute profiles, and the both sides that described flute profile connects part 23 have mutual to perforation.

Described saddle 22 is slidably connected to the middle part of described twin beams 1 liang of flat tube, described saddle 22 is divided into upper and lower two parts by one, the upper-part shape of described saddle 22 is as the stroke at character cut in bas-relief top, the lower component shape of described saddle 22 is as not font, the upper-part of described saddle 22 and lower component are all the cut-out workpieces of aluminium section bar, the both sides of described saddle 22 upper-part have mutual to perforation, what described saddle 22 upper-part was mutual is counterbore to the lateral surface of perforation, tapped bore is arranged at the bottom of the upper-part of described saddle 22, the both sides of described saddle 22 lower component have mutual to perforation, perforation is arranged at the top of the lower component of described saddle 22, described saddle 22 upper-part mutual to perforation by being rotationally connected lock bolt and the lower end of upper connecting rod 42, the perforation of described saddle 22 lower component is fixedly connected with by the tapped bore of bolt with described saddle 22 upper-part, described saddle 22 lower component mutual to perforation by lock bolt be connected with the rear end thereof of lower link 41.

Described lower link 41 and described upper connecting rod 42, all that a loop-shaped element is respectively welded at the two ends of a pipe, loop-shaped element is the blank of thick-walled tube, the loop-shaped element of described lower link 41 front end is passed through lock bolt, with 23 mutual being rotationally connected perforation of described channel being welded in front head tube, described seat pipe 43 is that a loop-shaped element is welded in the front end of a pipe, the flute profile described in the welding of below in the middle part of described seat pipe 43 connects part 23, the loop-shaped element of described seat pipe 43 front end, by the mutual corresponding perforation to lock bolt and described twin beams 1 front end, with mutual being rotationally connected perforation in described folded piece 21 flute profile stamping rear portion, the rear end of described seat pipe 43 connects saddle 5, the described flute profile being welded in described seat pipe 43 connect part 23 mutual to perforation by connecting the loop-shaped element of described upper connecting rod 42 upper end to lock screws.

Described front fork 32 is made up of wheel fork and front fork tube, the below of front fork tube connects wheel fork, wheel fork is that two downward bending of the sheetmetal of a bar shaped becomes fork-shaped, there is a pair mutual U-lag the both sides of wheel fork lower end, described front fork tube is rotationally connected by the front pore of seven bowls and described side arm 31, the U-shaped gap that described wheel fork is mutual, install front-wheel 7 by the cooperation of screw bolt and nut, described front-wheel 7 is inflated wheel of 10 inches.

Described V-shaped folding hand is 6, comprise hand pedestal 61, left hand is 62, right handgrip 63, left lock-connecting piece 64, right lock-connecting piece 65 and draw 66, described hand is made up of pedestal 61 pedestal moulding and interior poling, described interior poling comprises pipe and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, the lower end of described interior poling pipe is with angle, a bolt is respectively welded in the both sides on described interior poling pipe top, the bolt that the related both sides, top of described interior poling connect together injection moulding in described pedestal moulding, described pedestal moulding becomes upper base long, to go to the bottom short isosceles trapezoid shape, the right and left of described pedestal moulding has groove, the groove on the described pedestal moulding left side is opening groove left, groove on the right of described pedestal moulding is opening groove to the right, the right and left top of described pedestal moulding is U-lag, bottom is flat-bottom slot, the U-lag of the right and left of described pedestal moulding with described left hand corresponding for the caliber of 62 and described right handgrip 63, the both sides of described pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, the front of described pedestal moulding also has a ∩ shape front prominent, the perforation of a transverse direction is had on prominent before the ∩ shape of described pedestal moulding, described hand is poling in pedestal 61, coordinate bowl-type pad, hanging bolt and slope nut, penetrate in the front fork tube of described front fork 32, tighten hanging bolt, slope nut and described hand is made poling in pedestal 61 to be tightened up and misplace, thus make described hand that poling in pedestal 61 is fixedly connected in front fork tube, described left hand is 62 and described right handgrip 63, connected and composed by pipe and cast, described left hand is 62 and the pipe upper bend of described right handgrip 63, described left hand is connected cast 62 with the bottom of described right handgrip 63 pipe.

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

Described left hand is the cast of the cast of 62 and described right handgrip 63, by two to lock bolt, be rotationally connected with respectively described pedestal moulding the right and left mutual to perforation, left hand described in expansion is 62 and described right handgrip 63, the described latch hook of described right lock-connecting piece 65 is under the effect of described spring, the described round head bolt of described left lock-connecting piece 64 can be hooked instantaneously, mutual interlocking between described right lock-connecting piece 65 and described left lock-connecting piece 64, left hand described in realization is 62, described right handgrip 63 and described hand are interfixing between pedestal 61, described drawing forms by flat bar sheetmetal is bending 66, then flat bar sheetmetal is upon bending connected with the handle of plastics, described draw the two ends of 66 are had mutual to perforation, described draw mutual for 66 two ends to perforation by lock bolt, be rotationally connected with the perforation of transverse direction on prominent before described pedestal moulding ∩ shape.

Described driver train 9 comprises left bent axle 91, right bent axle 92, chain wheel 93, treadle 94, step 95, flywheel 96 and chain 97, described left bent axle 91 is by square shaft, left crank and left minor axis are formed, there is the tapped bore of an axis centre of the right-hand member end points of square shaft, the left end close-fitting of square shaft is socketed in the square hole of left crank, left crank is the metal stamping of sheet, one of left crank has a square hole, there is a circular hole other end, left minor axis is the axle that two lathe car of a round steel is little, there is the tapped bore of an axis centre of the left head end point of left minor axis, the right-hand member close-fitting of left minor axis is socketed in the circular hole of left crank, the left end of left minor axis is socketed a bearing, and be fastened to a bolt in the tapped bore of left minor axis bearing is located, described right bent axle 92 is by square hole circular shaft, right crank and right minor axis are formed, square hole circular shaft is the axle of a powder metallurgy, the profile of square hole circular shaft is cylindrical, the right-hand member of square hole circular shaft has a right convex tenon, there is a square hole at the square hole axial left part of circle and middle part, the axial right-hand member of square hole circle, and there is a counterbore centre being positioned at tenon, a through hole is had between the counterbore of square hole circular shaft and square hole, right crank is the metal stamping of sheet, one of right crank has a mortise, there is a circular hole other end, right crank is welded in the left surface of chain wheel 93, and make the mortise of right crank correspond to the interstitial hole of described chain wheel 93, described chain wheel 93 also on have circular hole corresponding to right crank, be socketed on the tenon of square hole circular shaft with close-fitting in described chain wheel 93 interstitial hole in the mortise of right crank, right minor axis is socketed with close-fitting in the circular hole of right crank in the circular hole of described chain wheel 93 correspondence, right minor axis is the axle that two lathe car of a round steel is little, there is the tapped bore of an axis centre of the right head end point of right minor axis, the right-hand member of right minor axis is socketed a bearing, and be fastened to a bolt in the tapped bore of right minor axis bearing is located, the square hole circular shaft of described right bent axle 92 penetrates in the endoporus of two bearings in described bearing seat 13 from right to left, the square shaft of described left bent axle 91 penetrates from left to right in the square hole of described right bent axle 92 square hole circular shaft, and make the left minor axis of described left bent axle 91 become 180 ° of correspondences with the right minor axis of described right bent axle 92, a bolt is penetrated in through hole again in described right bent axle 92 square hole circular shaft counterbore, and be fastened in the tapped bore of described left bent axle 91 square shaft fixing, described left bent axle 91 and described right bent axle 92 is made to be rotationally connected with in described bearing seat 13, described treadle 94 is by flat tube, sleeve, barrel and chute are formed, the rear end welded sleeve of flat tube, front end welding barrel, the below welding chute at the rear portion of flat tube, sleeve is the blank of thick-walled tube, barrel has attacked screw thread in the pore being cut into cast thick-walled tube, chute is bent as circular arc at two of the flat metal of a bar shaped, make the circle of the flat metal bending long circle of a bar shaped, described in two, the sleeve turning set of treadle 94 is connected to two of described fix shaft 15, and coordinate two pads to be fastened in the tapped bore at described fix shaft 15 two ends with two bolts, by treadle 94 rotational positioning described in two in two of described fix shaft 15, and make the slotted hole of treadle 94 chute described in two be socketed on on left minor axis connection bearing respectively, and with on right minor axis connection bearing, described step 95 is pedals of bicycle, step 95 described in two is fastened in the barrel of treadle 94 described in two respectively, described flywheel 96 is connected to the right side of described trailing wheel 8, described chain 97 is wire-wrapped on described chain wheel 93 and described flywheel 96.

Fig. 6 is the folding process schematic diagram of vehicle body of the present invention, and Fig. 7 is that the present invention folds complete figure.

Claims (10)

1. the folding upper and lower override type portable bicycle of twin beams saddle interlock, comprises twin beams, folded piece, saddle, two flute profiles connect part, side arm, front fork, step, lower link, upper connecting rod, seat pipe, saddle, V-shaped folding hand handle, front-wheel, trailing wheel and driver train, is characterized in that: twin beams comprises two flat tubes, two crosspieces, bearing seat, connecting leg, fix shaft, left back forks piece and right back forks piece, each welding one crosspiece between the front and rear part of two flat tubes, the rear end welding bearing seat of two flat tubes, bearing seat backhand welding is managed in succession, the rear end welding fix shaft of connecting leg, left back forks piece and right back forks piece are welded in the back lower place of bearing seat, and trailing wheel is installed in the rear end of left back forks piece and right back forks piece, the flute profile stamping of the inner side welding folded piece of twin beams two flat tube front end, folded piece is by flute profile stamping, thick-walled tube, latch hook member and torsion spring are formed, thick-walled tube is welded in the bottom of side arm rectangular tube rear end, latch hook member and torsion spring are by being connected to the rear portion of side arm rectangular tube to lock bolt, the flute profile stamping of folded piece is by being rotationally connected lock bolt and thick-walled tube, side arm is welded by front head tube and rectangular tube, rear side in the middle part of front head tube also welds a flute profile and connects part, the middle part sliding block joint saddle of twin beams two flat tube, saddle is made up of lower component and upper-part, the lower component of saddle is rotationally connected the rear end of lower link, the front end of lower link connects part with the flute profile being welded in front head tube and is rotationally connected, the front end of seat pipe is by being rotationally connected locking bolt and two front ends of twin beams and the flute profile stamping of folded piece, the middle part welding flute profile of seat pipe connects part, the rear end of seat pipe connects saddle, the flute profile being welded in a pipe connects the upper end that part is rotationally connected connecting rod, the lower end of upper connecting rod is rotationally connected with the upper-part of saddle, front fork is rotationally connected by seven bowls and front head tube, front-wheel is connected in front fork, V-shaped folding hand handle is fixedly connected with front fork tube, 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 and draw handle, hand is made up of pedestal pedestal moulding and interior poling, interior poling injection moulding is in pedestal moulding, the right and left of pedestal moulding has groove, the right and left top of pedestal moulding is U-lag, bottom is flat-bottom slot, the both sides of pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, hand coordinates pedestal with bowl-type pad by interior poling, hanging bolt and slope nut, be fixedly connected in front fork tube, draw being connected to hand pedestal, left hand is the parts being connected cast with the right handgrip bottom that is pipe, the plagiocephaly barrel of the left lock-connecting piece of lower weld of left hand handle, left lock-connecting piece is by a plagiocephaly barrel, one round head bolt and a nut are formed, twist in plagiocephaly barrel and connect round head bolt, the stubborn place of connecing of round head bolt and plagiocephaly barrel also twists and connects a nut, the channel of the right lock-connecting piece of lower weld of right handgrip, right lock-connecting piece is by channel, latch hook, to connecting bolt, spring and dowel bolt are formed, the both sides up and down of the flute profile left part of channel have mutual to perforation, a tapped bore is had in the middle part of the flute profile of channel, the upper and lower both sides of channel mutual to perforation by being rotationally connected the collar aperture in the middle part of connecting bolt and latch hook, latch hook is that left end becomes hook-type, there is collar aperture at middle part, the parts of right part band handle, the handle of latch hook there is an elongated hole, spring is positioned between the tapped bore of channel and the elongated hole of latch hook, penetrate with dowel bolt in the elongated hole of latch hook with in spring, be screwed into again in the tapped bore of channel, the cast of left hand handle and the cast of right handgrip, by two to lock bolt, be rotationally connected with respectively pedestal moulding the right and left mutual to perforation, the latch hook of right lock-connecting piece under the action of the spring, hook the round head bolt of left lock-connecting piece and realize interlocking, driver train comprises left bent axle, right bent axle, chain wheel, two treadles, two steps, flywheel and chain, right bent axle is fixedly connected with chain wheel, left bent axle and right bent axle are interconnected in the two bearings endoporus in bearing seat, the rear end of two treadles is socketed on the two ends of fix shaft respectively, treadle is by flat tube, sleeve, barrel and chute are formed, the rear end welded sleeve of flat tube, front end welding barrel, chute is an oblong circle, chute is welded in the rear portion of flat tube, each socket one bearing on the minor axis of left bent axle and right bent axle, left bent axle and right bent axle minor axis head bearing, be slidably connected in the chute at the rear portion of two treadles respectively, two steps are fastened to the front end of two treadles respectively, flywheel is installed on the right side of trailing wheel, on chain solderless wrapped connection and chain wheel and flywheel.

2. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: two front ends of described two flat tubes respectively have a perforation, the perforation of described two flat tube front ends is mutually corresponding, described bearing seat is that the double-ended vehicle of one section of pipe pore has the step placing bearing, described fix shaft is the axle that two lathe car of a round steel is little, the center of the two ends end points of described fix shaft has axial tapped bore, described left back forks piece is that top is with arc opening, bottom is with the strip metal punching of U-shaped gap, described right back forks piece is the strip metal stamping with two right-angle bendings in the middle part of in the of, the top of right back forks piece is with arc opening, the bottom of right back forks piece is with U-shaped gap, left back forks piece described in after welding with described bearing seat and described right back forks piece, forming one with described bearing seat is font.

3. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: the flute profile stamping of described folded piece is a flute profile stamping that Open Side Down, the front and rear of described folded piece flute profile stamping two sides respectively has one mutual to perforation, the flute profile stamping of the described folded piece after welding with described two flat tubes, perforation perforation being corresponded to described two flat tube front ends that rear portion is mutual, the latch hook member of described folded piece is middle and upper part is T-shaped, bottom is the parts of cast, the latch hook member of described folded piece and torsion spring are by being connected to the rear portion of described side arm rectangular tube to lock bolt.

4. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: the left and right sides at described side arm rectangular tube rear portion has mutual to perforation, the top at described side arm rectangular tube rear portion has an elongated hole, both sides, described side arm rectangular tube rear portion mutual to perforation and the elongated hole of top, for latch hook member and torsion spring by installing described folded piece to lock bolt, described flute profile connects the blanked part that part is a flute profile, and the both sides that described flute profile connects part have mutual to perforation.

5. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: the upper-part shape of described saddle is as the stroke at character cut in bas-relief top, the lower component shape of described saddle is as not font, the upper-part of described saddle and lower component are all the cut-out workpieces of aluminium section bar, the both sides of described saddle upper-part have mutual to perforation, what described saddle upper-part was mutual is counterbore to the lateral surface of perforation, tapped bore is arranged at the bottom of the upper-part of described saddle, the both sides of described saddle lower component have mutual to perforation, perforation is arranged at the top of the lower component of described saddle, the perforation of described saddle lower component is fixedly connected with by the tapped bore of bolt with described saddle upper-part.

6. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: described lower link and described upper connecting rod, all that a loop-shaped element is respectively welded at the two ends of a pipe, loop-shaped element is the blank of thick-walled tube, described seat pipe is that a loop-shaped element is welded in the front end of a pipe, and the flute profile described in the welding of below in the middle part of described seat pipe connects part.

7. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: described interior poling comprises pipe and two bolts, the outer tube diameter gear hobbing on described interior poling pipe top, the lower end of described interior poling pipe is with angle, a bolt is respectively welded in the both sides on described interior poling pipe top, described pedestal moulding becomes upper base long, to go to the bottom short isosceles trapezoid shape, the right and left of described pedestal moulding has groove, the groove on the described pedestal moulding left side is opening groove left, groove on the right of described pedestal moulding is opening groove to the right, the U-lag of the right and left of described pedestal moulding with described left hand corresponding with the caliber of described right handgrip, the front of described pedestal moulding also has a ∩ shape front prominent, the perforation of a transverse direction is had on prominent before the ∩ shape of described pedestal moulding.

8. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: described plagiocephaly barrel is that an of barrel makes plagiocephaly, the head of described plagiocephaly barrel and the lower weld of described left hand handle, described channel is opening flute profile backward, the right head of described channel is plagiocephaly, the right head of described channel and the lower weld of described right handgrip, mutual interlocking between described right lock-connecting piece and described left lock-connecting piece, left hand handle described in realization, described right handgrip and described hand are interfixing between pedestal, it is described that to draw the two ends of handle to have mutual to perforation, described draw mutual for two ends to perforation by lock bolt, be rotationally connected with the perforation of transverse direction on prominent before described pedestal moulding ∩ shape.

9. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: described left bent axle is by square shaft, left crank and left minor axis are formed, there is the tapped bore of an axis centre of the right-hand member end points of square shaft, the left end close-fitting of square shaft is socketed in the square hole of left crank, left crank is the metal stamping of sheet, one of left crank has a square hole, there is a circular hole other end, left minor axis is the axle that two lathe car of a round steel is little, there is the tapped bore of an axis centre of the left head end point of left minor axis, the right-hand member close-fitting of left minor axis is socketed in the circular hole of left crank, the left end of left minor axis is socketed a bearing, and be fastened to a bolt in the tapped bore of left minor axis bearing is located, described right bent axle is by square hole circular shaft, right crank and right minor axis are formed, square hole circular shaft is the axle of a powder metallurgy, the profile of square hole circular shaft is cylindrical, the right-hand member of square hole circular shaft has a right convex tenon, there is a square hole at the square hole axial left part of circle and middle part, the axial right-hand member of square hole circle, and there is a counterbore centre being positioned at tenon, a through hole is had between the counterbore of square hole circular shaft and square hole, right crank is the metal stamping of sheet, one of right crank has a mortise, there is a circular hole other end, right crank is welded in the left surface of chain wheel, and make the mortise of right crank correspond to the interstitial hole of described chain wheel, described chain wheel also on have circular hole corresponding to right crank, be socketed on the tenon of square hole circular shaft with close-fitting in described chain wheel interstitial hole in the mortise of right crank, right minor axis is socketed with close-fitting in the circular hole of right crank in the circular hole that described chain wheel is corresponding, right minor axis is the axle that two lathe car of a round steel is little, there is the tapped bore of an axis centre of the right head end point of right minor axis, the right-hand member of right minor axis is socketed a bearing, and be fastened to a bolt in the tapped bore of right minor axis bearing is located, the square hole circular shaft of described right bent axle penetrates in the endoporus of two bearings in described bearing seat from right to left, the square shaft of described left bent axle penetrates from left to right in the square hole of described right bent axle square hole circular shaft, and make the left minor axis of described left bent axle become 180 ° of correspondences with the right minor axis of described right bent axle, a bolt is penetrated in through hole again in described right bent axle square hole circular shaft counterbore, and be fastened in the tapped bore of described left bent axle square shaft fixing, the crank rotation on described left bent axle and the described right side is connected in described bearing seat.

10. the folding upper and lower override type portable bicycle of twin beams saddle interlock according to claim 1, it is characterized in that: sleeve is the blank of thick-walled tube, barrel has attacked screw thread in the pore being cut into cast thick-walled tube, chute is the circle bending two of the flat metal of a bar shaped as circular arc, make the flat metal bending long circle of a bar shaped, the sleeve turning set of treadle described in two is connected to two of described fix shaft, and coordinates two pads to be fastened in the tapped bore at described fix shaft two ends with two bolts.