CN104608864B - Override type portable bicycle above and below the linkage folding of twin beams saddle - Google Patents

Abstract

The invention discloses override type portable bicycle above and below a kind of linkage folding of twin beams saddle, including 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 drive mechanism, twin beams is by two flat tubes, two crosspieces, bearing block, connecting leg, locating shaft, it is left, right dropout is welded, twin beams front end and the rear end of side arm connection folded piece, be slidably connected saddle in the middle part of twin beams, each welding flute profile connects part on side arm and seat pipe, left and right dropout installs trailing wheel, saddle connects lower link and upper connecting rod, lower link and upper connecting rod connect part connection with the flute profile on side arm and seat pipe again, seat pipe front end and the connection of 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, drive mechanism includes left bent axle, right bent axle, chain wheel, two treadles, two steps, flywheel and chain.

Description

Override type portable bicycle above and below the linkage folding of twin beams saddle

Technical field

The present invention relates to a kind of folding bike, more particularly to a kind of twin beams saddle linkage fold above and below override type it is portable Bicycle.

Background technology

Folding three-wheeled electric car in the market, folding rate is not fast and folds to obtain also smaller folding three Electric car is taken turns, this is due to the reasons such as structure, and box promising result can not be reached after folding.

The content of the invention

The invention aims to provide it is a kind of slided using saddle in twin beams, linkage bar linkage structure is as Foldable square Override type portable bicycle above and below the twin beams saddle linkage folding of formula.The object of the present invention is achieved like this；Twin beams saddle joins It is dynamic fold above and below override type portable bicycle, including twin beams, folded piece, saddle, two flute profiles connect part, side arm, front fork, step, under Connecting rod, upper connecting rod, seat pipe, saddle, V-shaped folding hand handle, front-wheel, trailing wheel and drive mechanism, it is characterized in that：It is flat that twin beams includes two Each welding one is horizontal between pipe, two crosspieces, bearing block, connecting leg, locating shaft, left back forks piece and right dropout, the front and rear part of two flat tubes Shelves, the rear end welding bearing block of two flat tubes, bearing block backhand welding is managed in succession, the rear end welding locating shaft of connecting leg, after bearing block The rear end installation trailing wheel of left back forks piece and right dropout, left back forks piece and right dropout is welded in lower section, the flat tube front end of twin beams two The flute profile stamping of folded piece is welded in inner side, and folded piece is made up of flute profile stamping, thick-walled tube, latch hook member and torsion spring, thick-walled tube The bottom of side arm rectangular tube rear end is welded in, latch hook member and torsion spring to lock bolt connection by, in the rear portion of side arm rectangular tube, rolling over The flute profile stamping of overlapping piece is connected by being rotated to lock bolt with thick-walled tube, and side arm is welded by preceding head tube and rectangular tube, preceding Rear side in the middle part of head tube also welds a flute profile and connects the saddle that is slidably connected in the middle part of part, the flat tube of twin beams two, and saddle is by lower component and upper Part is constituted, and the lower component of saddle rotates the rear end of connection lower link, and the front end of lower link connects with being welded in the flute profile of preceding head tube Part rotates connection, and the front end of seat pipe is rotated by two front ends to lock bolt and twin beams and the flute profile stamping of folded piece to be connected, seat The middle part welding flute profile of pipe connects part, and the rear end connection saddle of seat pipe, the flute profile for being welded in seat pipe connects part rotation connection upper connecting rod Upper end, the lower end of upper connecting rod is rotationally connected with the upper-part of saddle, and front fork is rotated with preceding head tube by seven bowls and is connected, and front-wheel connects In front fork；V-shaped folding hand with front fork tube being fixedly connected, and V-shaped folding hand handle is quick interlocking Formula V font folding hand handle, Including handle base, left hand handle, right handgrip, left lock-connecting piece, right lock-connecting piece and handle is drawn, handle base is by pedestal moulding and interior wears Pipe is constituted, and interior poling is molded in pedestal moulding, and the right and left of pedestal moulding has groove, the right and left of pedestal moulding Top is that U-lag, bottom are flat-bottom slot, and the both sides of pedestal moulding the right and left flat-bottom slot respectively have one mutual to perforation, hand Pedestal is coordinated bowl-type pad, hanging bolt and slope nut by interior poling, is fixedly connected in front fork tube, draws handle to be connected to Handle base, left hand be with right handgrip pipe bottom connect cast part, the left lock-connecting piece of lower weld of left hand handle Plagiocephaly barrel, left lock-connecting piece is made up of a plagiocephaly barrel, a snap bolt and a nut, twist-on snap bolt in plagiocephaly barrel, The also nut of twist-on one, the channel of the right lock-connecting piece of lower weld of right handgrip, right lock at the twist-on of snap bolt and plagiocephaly barrel Fitting to connecting bolt, spring and bolt by channel, latch hook, constitute, and there is phase the both sides up and down of the flute profile left part of channel It is mutual to perforation, have in the middle part of the flute profile of channel both sides above and below a screwed hole, channel it is mutual to being punched through to connecting bolt Rotate and be connected with the collar aperture in the middle part of latch hook, latch hook is that left end has the part of collar aperture, right part with handle, the handle of latch hook into hook-type, middle part On have an elongated hole, spring is positioned between the screwed hole of channel and the elongated hole of latch hook, the length of latch hook is penetrated with bolt In hole and in spring, then it is screwed into the screwed hole of channel, the cast of left hand handle and the cast of right handgrip, passes through two pairs of lock spiral shells Bolt, be rotationally connected with respectively pedestal moulding the right and left it is mutual to perforation, the latch hook of right lock-connecting piece under the action of the spring, Hook the snap bolt of left lock-connecting piece and realize interlocking；Drive mechanism is stepped on including left bent axle, right bent axle, chain wheel, two treadles, two Pin, flywheel and chain, right bent axle are fixedly connected with chain wheel, and left bent axle and right bent axle are interconnected in the two bearings in bearing block Kong Zhong, the rear end of two treadles is socketed on the two ends of locating shaft respectively, and treadle is made up of flat tube, sleeve, barrel and chute, flat tube Rear end welded sleeve, front end welding barrel, chute is the circle of a Long Circle, and chute is welded in the rear portion of flat tube, left bent axle and the right side One bearing of each socket, left bent axle and right bent axle short axle upper bearing (metal), are slidably connected to the rear portion of two treadles respectively in the short axle of bent axle Chute in, two steps are fastened to the front end of two treadles respectively, and flywheel is installed on the right side of trailing wheel, chain solderless wrapped connection and chain wheel and winged On wheel.

The beneficial effects of the invention are as follows：The present invention is using saddle is slided in twin beams, linkage bar linkage structure is used as folding Mode so that after the latch hook member for opening folded piece, the head tube saddle that can link is slided backward before pulling backward, so that the seat pipe that links Folded together to twin beams, generate the effect that side arm and seat pipe can be folded with Double beam link, improved folding rate and fold and imitate Really；Using quick interlocking Formula V font folding hand handle, vehicle is allowed to fold more quick and effective, by the left end of left bent axle and right song Bearing is each provided with the right-hand member of axle, and is slidably connected in the chute at treadle rear portion so that the driving machine of override type up and down Structure is simplified, cost is reduced.

Brief description of the drawings：

Fig. 1 is schematic structural view of the invention

Connection diagrams of the Fig. 2 for the structure chart of folded piece of the present invention and with side arm

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

Fig. 4 is the organigram of handle base of the present invention

Fig. 5 is the structural representation of left lock-connecting piece of the invention and left lock-connecting piece

Fig. 6 is left bent axle of the invention and right crankshaft configuration schematic diagram

Fig. 7 is the folding process schematic diagram of vehicle body of the present invention

In figure：1 --- twin beams, 21 --- folded piece, 22 --- saddle, 23 --- flute profile connect part, 31 --- side arm, 32 --- front fork, 41 --- lower link, 42 --- upper connecting rod, 43 --- seat pipe, 5 --- saddle, 6 --- V-shaped folding hand handles, 7 --- front-wheel, 8 --- trailing wheel, 9 --- drive mechanism；Wherein twin beams 1 also includes：11 --- two flat tubes, 12 --- crosspiece, 13 --- bearing block, 14 --- connecting leg, 15 --- locating shaft, 16 --- left back forks piece, 17 --- right dropout；V-shaped is folded Hand also includes 6：61 --- --- left hand handle, 63 --- right handgrip, 64 --- left lock-connecting piece, 65 --- right sides of handle base, 62 Lock-connecting piece, 66 --- draw handle；Left lock-connecting piece 64 also includes：641 --- plagiocephaly barrel, 642 --- snap bolt, 643 --- spiral shell It is female；Right lock-connecting piece 65 also includes：651 --- channel, 652 --- latch hook, 653 --- to connecting bolt, 654 --- spring, 655 --- bolt；Drive mechanism 9 also includes：91 --- left bent axle, 92 --- right bent axle, 93 --- chain wheel, 94 --- step on Bar, 95 --- step, 96 --- flywheel, 97 --- chain.

Embodiment：

According to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, described twin beams saddle linkage fold above and below override type it is portable voluntarily Car, including 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 43rd, saddle 5, V-shaped folding hand are 6, front-wheel 7, trailing wheel 8 and drive mechanism 9；

Described twin beams 1 includes two flat tubes 11, crosspiece 12, bearing block 13, connecting leg 14, locating shaft 15, the and of left back forks piece 16 Right dropout 17, two front ends of two flat tube 11 are respectively provided with a perforation, and the perforation of the front end of two flat tube 11 is mutually corresponded to, institute Respectively weld the crosspiece 12 described in one, the rear end welding bearing block of two flat tube 11 in anterior and middle part the inner side of two flat tube 11 stated 13, described bearing block 13 is that the double-ended vehicle of one section of pipe pore has the step for placing bearing, and described bearing block is welded backward A bearing is respectively inlayed at described connecting leg 14, the left and right end of described bearing block 13, and locating shaft 15 is welded in the rear end of the connecting leg 14, Described locating shaft 15 is two small axle of lathe car of a round steel, and the center of the two ends end points of the locating shaft 15 is provided with axle To screwed hole, the back lower place of the bearing block 13 welds left back forks piece 16 and right dropout 17, and described left back forks piece 16 is Top carries the strip metal punching of U-shaped gap with arc opening, bottom, and described right dropout 17 is that a middle part is straight with two The strip metal stamping of angle bending, the top of right dropout 17 carries arc opening, and the bottom of right dropout 17 carries U-shaped gap, Left back forks piece 16 and described right dropout 17 described in after being welded with the bearing block 13, are formed with described bearing block 13 One is font, and the U-shaped gap of the left back forks piece 16 neutralizes and trailing wheel 8 is installed in the U-shaped gap of the right dropout 17, described Trailing wheel 8 is 10 inches of inflated wheel.

The inner side welding flute profile stamping for folding 21 of the front end of two flat tube 11, folded piece 1 is by flute profile stamping, thickness Wall pipe, latch hook member and torsion spring are constituted, and the flute profile stamping of the folded piece 21 is a flute profile stamping that Open Side Down, the folding The front and rear of the flute profile stamping two sides of part 21 respectively has mutual to perforation a, folding after being welded with two flat tube 11 The flute profile stamping of overlapping piece 21, the mutual perforation to perforating corresponding to the front end of two flat tube 11 in rear portion, the folded piece 21 Thick-walled tube is welded in the bottom of the rectangular tube rear end of side arm 31, the latch hook member of the folded piece 11 be middle and upper part for T-shaped, under Portion is the part of cast, and the latch hook member and torsion spring of the folded piece 21 pass through to locking bolt connection in the rectangular tube of side arm 31 Rear portion, the flute profile stamping of the folded piece 21 is connected by being rotated to lock bolt with the thick-walled tube of the folded piece.

Described side arm 31 is formed by the rectangular tube of upper weld one of preceding head tube, the left and right at the rectangular tube rear portion of side arm 31 Both sides are provided with mutual to be provided with after an elongated hole, the rectangular tube of side arm 31 to perforation, above the rectangular tube rear portion of side arm 31 Portion both sides it is mutual to perforation and the elongated hole of top, latch hook member and the torsion of the folded piece 21 are installed for passing through to lock bolt The middle part of head tube also welds a flute profile and connects part 23 before spring, the side arm 31, and described flute profile connects the stamping parts that part 23 is a flute profile, The both sides that the flute profile connects part 23 have mutual to perforation.

Described saddle 22 is slidably connected to the middle part of 1 liang of flat tube of twin beams, described saddle 22 by one point be above and below Stroke at the top of two parts, the upper-part shape such as character cut in bas-relief of the saddle 22, the lower component shape such as Ji font of the saddle 22, The upper-part and lower part of the saddle 22 is all the cutting off processing part of aluminium section bar, and the both sides of the upper-part of saddle 22 have mutually To perforation, the mutual lateral surface to perforation of the upper-part of saddle 22 is counterbore, the bottom of the upper-part of the saddle 22 There is screwed hole, the both sides of the lower component of saddle 22 have mutual to perforating, have perforation at the top of the lower component of the saddle 22, The upper-part of saddle 22 is mutual to be connected to being punched through rotating lock bolt with the lower end of upper connecting rod 42, under the saddle 22 The bolt that is punched through of part is fixedly connected with the screwed hole of the upper-part of saddle 22, mutual pair of the lower component of saddle 22 It is punched through being connected lock bolt with the rear end thereof of lower link 41.

Described lower link 41 and described upper connecting rod 42, are all that a loop-shaped element, loop-shaped element are respectively welded in the two ends of a pipe It is the blank of thick-walled tube, the loop-shaped element of the front end of lower link 41 is by lock bolt, with being welded in described in preceding head tube Mutual being rotated to perforation in the 23 of channel is connected, and described seat pipe 43 is that a loop-shaped element, the seat are welded in the front end of a pipe The described flute profile of the lower section welding at the middle part of pipe 43 connects part 23, the loop-shaped element of the front end of seat pipe 43, by lock bolt with it is described The mutual corresponding perforation of the front end of twin beams 1, and mutual being rotated to perforation in the flute profile stamping rear portion of the folded piece 21 are connected, described The rear end connection saddle 5 of seat pipe 43, the flute profile for being welded in the seat pipe 43 connects the mutual to being punched through to lock of part 23 Bolt rotates the loop-shaped element of the connection upper end of upper connecting rod 42.

Described front fork 32 is made up of wheel fork and front fork tube, the lower section connection wheel fork of front fork tube, and wheel fork is the gold of a bar shaped Belong to two downward bending of piece into fork-shaped, the both sides of wheel fork lower end there are a pair of mutual U-lags, and described front fork tube passes through seven Bowl is rotated with the front pore of the side arm 31 and is connected, the mutual U-shaped gap of the wheel fork, is pacified by the cooperation of screw bolt and nut Front-wheel 7 is filled, described front-wheel 7 is 10 inches of inflated wheel.

Described V-shaped folding hand is 6, including handle base 61, left hand are 62, right handgrip 63, left lock-connecting piece 64, right lock Fitting 65 and drawing are 66, and described handle base 61 is made up of pedestal moulding and interior poling, and described interior poling includes pipe With two bolts, the outer tube diameter on the interior poling pipe top is with gear hobbing, and the lower end of the interior poling pipe carries angle, described Each one bolt of welding in the both sides on interior poling pipe top, the bolt of the related both sides connection in top of the interior poling be molded together in In the pedestal moulding, described pedestal moulding is into upper bottom length, go to the bottom short isosceles trapezoid shape, described pedestal moulding The right and left have groove, the groove on the pedestal moulding left side is the groove being open to the left, and the groove on the right of the pedestal moulding is Opening groove to the right, the right and left top of the pedestal moulding is that U-lag, bottom are flat-bottom slot, the pedestal moulding The right and left U-lag it is with described left hand that the caliber of 62 and described right handgrip 63 is corresponding, the pedestal moulding The both sides of the right and left flat-bottom slot respectively have one mutual to perforation, and the front of the pedestal moulding also has dashes forward before a ∩ shapes, institute Stating has a horizontal perforation on being dashed forward before the ∩ shapes of pedestal moulding, the interior poling of the handle base 61 coordinates bowl-type pad, hung In tight bolt and slope nut, the front fork tube for penetrating the front fork 32, hanging bolt is tightened, makes slope nut with the hand base The interior poling of seat 61 is tightened up and misplaced, so that the interior poling of the handle base 61 is fixedly connected in front fork tube, it is described Left hand is connected and composed 62 and described right handgrip 63 by pipe and cast, and described left hand is 62 and described right handgrip 63 Pipe upper bend, the bottom of 62 and the described pipe of right handgrip 63 connects cast by described left hand.

Described left lock-connecting piece 64 is made up of a plagiocephaly barrel 641, a snap bolt 642 and a nut 643, and described is oblique Head barrel 641 is one of a barrel and is made plagiocephaly, the head of the plagiocephaly barrel 641 and the left hand 62 lower weld, Snap bolt 642 in the screwed hole of the plagiocephaly barrel 641 described in twist-on, the snap bolt 642 and the plagiocephaly barrel Nut 643 at 641 twist-on also described in twist-on one, described right lock-connecting piece 65 is by channel 651, latch hook 652, to connecting bolt 653rd, spring 654 and bolt 655 are constituted, and described channel 651 is the flute profile being open backward, the channel 651 Right head is plagiocephaly, and the both sides up and down of the flute profile left part of channel 651 have mutual to perforation, the flute profile of the channel 651 There is the lower weld of a screwed hole, the right head of the channel 651 and the right handgrip 63 at middle part, and the channel is about 651 Both sides are mutual to be connected to being punched through described being rotated to connecting bolt 653 with the collar aperture at the middle part of latch hook 652, described lock Hook 652 is that left end has on the part of collar aperture, right part with handle, the handle of the latch hook 652 into hook-type, middle part and has an elongated hole, the lock The elongated hole of hook 652 is corresponding with the screwed hole of the channel 651, and described spring 654 is positioned over into the channel 651 Between the elongated hole of screwed hole and the latch hook 652, penetrated with described bolt 655 in the elongated hole of the latch hook 652 and institute In the spring 654 stated, then it is screwed into the screwed hole of the channel 651.

The left hand by two pairs of lock bolts, is respectively rotationally connected with 62 cast and the cast of the right handgrip 63 Described pedestal moulding the right and left it is mutual to perforation, the described left hand of expansion is 62 and described right handgrip 63, the right side The latch hook 652 of lock-connecting piece 65 can hook the round end of the left lock-connecting piece 64 moment in the presence of the spring 654 Bolt 642, the mutual interlocking between the right lock-connecting piece 65 and the left lock-connecting piece 64, realize described left hand 62, it is described Right handgrip 63 and described handle base 61 between interfix, described drawing bent 66 by flat bar sheet metal and Into being then connected with the handle of plastics on flat bar sheet metal upon bending, 66 two ends are had mutual to wearing by the drawing Hole, the drawing is mutual horizontal on to being dashed forward before lock bolt, with the pedestal moulding ∩ shapes to being punched through in 66 two ends Perforation rotates connection.

Described drive mechanism 9 includes left bent axle 91, right bent axle 92, chain wheel 93, treadle 94, step 95, flywheel 96 and chain Bar 97, described left bent axle 91 is made up of square shaft, left crank and left short axle, and there is the spiral shell of an axial direction centre of the right-hand member end points of square shaft Pit, the left end close-fitting of square shaft is socketed in the square hole of left crank, and left crank is the metal stamping of sheet, and one of left crank has One square hole, other end have a circular hole, during left short axle is two small axle of lathe car of a round steel, the left head end point of left short axle Between have the screwed hole of an axial direction, the right-hand member close-fitting of left short axle is socketed in the circular hole of left crank, and the left end of left short axle is socketed an axle Hold, and be fastened to a bolt in the screwed hole of left short axle and position bearing, described right bent axle 92 is by square hole circular shaft, right crank Constituted with right short axle, square hole circular shaft is the axle of a powder metallurgy, and the profile of square hole circular shaft is in cylinder, and the right-hand member of square hole circular shaft has One right convex tenon, square hole justifies axial left part and there is a square hole at middle part, and square hole justifies axial right-hand member and positioned at tenon There is a counterbore centre of head, has a through hole between the counterbore and square hole of square hole circular shaft, right crank is the metal stamping of sheet, right song One of handle has a mortise, and there is a circular hole other end, and right crank is welded in the left surface of chain wheel 93, and makes the mortise pair of right crank The interstitial hole of chain wheel 93 described in Ying Yu, the chain wheel 93 also on have in circular hole corresponding to right crank, the mortise of right crank and institute State close-fitting in the interstitial hole of chain wheel 93 to be socketed on the tenon of square hole circular shaft, with the circle of right crank in the corresponding circular hole of the chain wheel 93 Close-fitting is socketed right short axle in hole, and right short axle is two small axle of lathe car of a round steel, the centre of the right head end point of right short axle There is the screwed hole of an axial direction, the right-hand member of right short axle is socketed a bearing, and is fastened to axle with a bolt in the screwed hole of right short axle Positioning is held, the square hole circular shaft of the right bent axle 92 is penetrated in the bearing block 13 in the endoporus of two bearings from right to left, described The square shaft of left bent axle 91 is penetrated in the square hole of the right square hole circular shaft of bent axle 92 from left to right, and makes a left side for the left bent axle 91 Short axle and the right short axle of the right bent axle 92 are corresponding into 180 °, then are worn in the through hole in the right square hole circular shaft counterbore of bent axle 92 Enter a bolt and be fastened in the screwed hole of the square shaft of left bent axle 91 to fix, make described left bent axle 91 and the right song Axle 92 is rotationally connected with described bearing block 13, and described treadle 94 is made up of flat tube, sleeve, barrel and chute, flat tube Rear end welded sleeve, front end welding barrel, the lower section welding chute at the rear portion of flat tube, sleeve is the blank of thick-walled tube, spiral shell Cylinder be cut into it is tapped in the pore of cast thick-walled tube, chute be by two of the flat metal of a bar shaped make circular arc bending, Make the circle of the flat metal bending long circle of a bar shaped, the sleeve of treadle 94 described in two, which is rotated, is socketed on the two of the locating shaft 15 Head, and coordinate two pads to be fastened in the screwed hole at the two ends of locating shaft 15 with two bolts, the treadle 94 described in two is rotated Two of the locating shaft 15 is positioned at, and the slotted hole of the chute of treadle 94 described in two is socketed on respectively and left short axle connecting shaft Hold, and be connected with right short axle on bearing, described step 95 is the pedal of bicycle, the step 95 described in two is fastened to respectively In the barrel of treadle 94 described in two, described flywheel 96 is connected to the right side of the trailing wheel 8, and described chain 97 is wire-wrapped in described Chain wheel 93 and described flywheel 96 on.

Claims (8)

1. override type portable bicycle above and below a kind of twin beams saddle linkage folding, including 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 drive mechanism, It is characterized in that：Twin beams includes two flat tubes, two crosspieces, bearing block, connecting leg, locating shaft, left back forks piece and right dropout, two flat tubes A crosspiece is welded at one crosspiece of front portion welding, the rear portion of two flat tubes, and bearing block is welded in the rear end of two flat tubes, and bearing block backhand welding is in succession Pipe, the rear end welding locating shaft of connecting leg, left back forks piece and right dropout, left back forks piece and right back vent are welded in the back lower place of bearing block Trailing wheel is installed in the rear end of piece, and the flute profile stamping of folded piece is welded in the inner side of the flat tube front end of twin beams two, and folded piece is by flute profile stamping, thickness Wall pipe, latch hook member and torsion spring are constituted, and thick-walled tube is welded in the bottom of side arm rectangular tube rear end, and it is right that latch hook member and torsion spring pass through Bolt connection is locked in the rear portion of side arm rectangular tube, and the flute profile stamping of folded piece is connected by being rotated to lock bolt with thick-walled tube, Side arm is welded by preceding head tube and rectangular tube, and the rear side in the middle part of preceding head tube also welds a flute profile and connected in part, the flat tube of twin beams two Portion is slidably connected saddle, and saddle is made up of lower component and upper-part, and the lower component of saddle rotates the rear end of connection lower link, lower company The front end of bar be welded in before the flute profile of head tube connect part and rotate and be connected, the front end of seat pipe passes through two front ends to locking bolt and twin beams Connection is rotated with the flute profile stamping of folded piece, the middle part welding flute profile of seat pipe connects part, and the rear end connection saddle of seat pipe is welded in seat The flute profile of pipe connects the upper end that part rotates connection upper connecting rod, and the lower end of upper connecting rod is rotationally connected with the upper-part of saddle, and front fork passes through Seven bowls are rotated with preceding head tube and are connected, and front-wheel is connected in front fork；V-shaped folding hand handle is fixedly connected with front fork tube, V-shaped folding hand Being quick interlocking Formula V font folding hand handle, including handle base, left hand handle, right handgrip, left lock-connecting piece, right lock-connecting piece and drawing Handle base is made up of pedestal moulding and interior poling, and interior poling is molded in pedestal moulding, the left and right of pedestal moulding There is a groove on both sides, and the right and left top of pedestal moulding is that U-lag, bottom are flat-bottom slot, and pedestal moulding the right and left is flat The both sides of groove respectively have one mutual to perforation, and handle base coordinates bowl-type pad, hanging bolt and slope nut by interior poling, It is fixedly connected in front fork tube, draws handle to be connected to handle base, portion of the left hand the bottom connection cast for right handgrip being pipe Part, 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, a snap bolt and a nut Constitute, twist-on snap bolt in plagiocephaly barrel, the also nut of twist-on one at the twist-on of snap bolt and plagiocephaly barrel, under right handgrip The channel of right lock-connecting piece is welded in portion, right lock-connecting piece by channel, latch hook, connecting bolt, spring and bolt are constituted, flute profile The both sides up and down of the flute profile left part of part have mutual to perforation, and the flute profile middle part of channel has two above and below a screwed hole, channel Side is mutual to be connected to being punched through rotating connecting bolt with the collar aperture in the middle part of latch hook, and latch hook is that left end has circle into hook-type, middle part Have an elongated hole on the part of hole, right part with handle, the handle of latch hook, by spring be positioned over channel screwed hole and latch hook elongated hole it Between, penetrated with bolt in the elongated hole of latch hook and spring in, then be screwed into the screwed hole of channel, the cast of left hand handle and The cast of right handgrip, by two pairs of lock bolts, be rotationally connected with respectively pedestal moulding the right and left it is mutual to perforation, right lock The latch hook of fitting under the action of the spring, hooks the snap bolt of left lock-connecting piece and realizes interlocking；Drive mechanism include left bent axle, Right bent axle, chain wheel, two treadles, two steps, flywheel and chain, right bent axle are fixedly connected with chain wheel, and left bent axle and right bent axle are mutual It is connected in the two bearings endoporus in bearing block, the rear end of two treadles is socketed on the two ends of locating shaft respectively, and treadle is by flat tube, set Cylinder, barrel and chute are constituted, rear end welded sleeve, the front end welding barrel of flat tube, and chute is the circle of a Long Circle, chute welding In the rear portion of flat tube, the bearing in the short axle of left bent axle and right bent axle in one bearing of each socket, the short axle of left bent axle is slidably connected In the chute at the rear portion of left side treadle, the bearing in the short axle of right bent axle is slidably connected to the chute at the rear portion of right side treadle In, twist-on has a step respectively for the front end of two treadles, and flywheel is installed in the right side of trailing wheel, chain solderless wrapped connection and chain wheel and flywheel； The flute profile stamping of the folded piece is a flute profile stamping that Open Side Down, and the front portion of the folded piece flute profile stamping two sides is with after Portion respectively has one mutual to perforation, the flute profile stamping rear portion of the folded piece after being welded with two flat tube it is mutual to wearing Hole corresponds to the perforation of the two flat tubes front end, and the latch hook member of the folded piece is that middle and upper part is that T-shaped, bottom are cast Part, the latch hook member and torsion spring of the folded piece pass through to locking bolt connection in the rear portion of the side arm rectangular tube；The side arm The left and right sides at rectangular tube rear portion be provided with it is mutual be provided with an elongated hole to perforation, above the side arm rectangular tube rear portion, it is described Side arm rectangular tube rear portion both sides it is mutual to perforation and the elongated hole of top, latch hook member and torsion spring for installing the folded piece, Described flute profile connects the stamping parts that part is a flute profile, and the both sides that the flute profile connects part have mutual to perforation.

2. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Described two Two front ends of flat tube are respectively provided with a perforation, and the perforation of the two flat tubes front end is mutually corresponded to, and described bearing block is one section of pipe The double-ended vehicle of pore has the step for placing bearing, and described locating shaft is two small axle of lathe car of a round steel, described fixed The center of the two ends end points of position axle is provided with axial screwed hole, and described left back forks piece is that top carries U with arc opening, bottom The strip metal punching of shape gap, described right dropout is the strip metal stamping that a middle part carries two right-angle bendings, it is right after The top of forks piece carries arc opening, and the bottom of right dropout carries U-shaped gap, left back described in after being welded with the bearing block Forks piece and described right dropout, are font with described bearing block formation one.

3. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：The cunning Have a pair of connection sheets below stroke at the top of the upper-part shape such as character cut in bas-relief of part, the saddle lower component, the saddle it is upper Part and lower component are all the cutting off processing parts of aluminium section bar, and the both sides of the saddle upper-part have mutual to perforation, the cunning The mutual lateral surface to perforation of part upper-part is counterbore, and the bottom of the upper-part of the saddle has under screwed hole, the saddle A pair of connection sheet both sides of part have mutual to perforating, and have perforation, the saddle bottom at the top of the lower component of the saddle The bolt that is punched through of part is fixedly connected with the screwed hole of the saddle upper-part.

4. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Described Lower link and described upper connecting rod, are 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 the flute profile described in the lower section welding in the middle part of one loop-shaped element of front end welding of a pipe, the seat pipe connects part.

5. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Described Interior poling includes pipe and two bolts, and the outer tube diameter on the interior poling pipe top is with gear hobbing, under the interior poling pipe End carries angle, each one bolt of welding in the both sides on the interior poling pipe top, and described pedestal moulding is into upper bottom length, bottom Short isosceles trapezoid shape, the right and left of described pedestal moulding has a groove, the groove on the pedestal moulding left side be opening to Groove on the right of left groove, the pedestal moulding is the groove being open to the right, the U-lag on the left side of the pedestal moulding with it is described Left hand handle caliber it is corresponding, the U-lag on the right of the pedestal moulding is corresponding with the caliber of described right handgrip, institute The front for stating pedestal moulding also has and dashed forward before a ∩ shapes, dashed forward before the ∩ shapes of the pedestal moulding on have a horizontal perforation.

6. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Described Plagiocephaly barrel is one of a barrel and plagiocephaly is made, and the lower weld of the head of the plagiocephaly barrel and the left hand handle is described Channel is the flute profile being open backward, and the right head of the channel is plagiocephaly, right head and the right handgrip of the channel Lower weld, the mutual interlocking between the right lock-connecting piece and the left lock-connecting piece realizes described left hand, the described right hand Interfixing between described handle base, the two ends for drawing handle have mutual to perforation, and the drawing is two ends phase It is mutual to being punched through to lock bolt, dashed forward with before the pedestal moulding ∩ shapes on horizontal perforation rotate and be connected.

7. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Described Left bent axle is made up of square shaft, left crank and left short axle, and there are the screwed hole of an axial direction, a left side for square shaft in the centre of the right-hand member end points of square shaft End close-fitting is socketed in the square hole of left crank, and left crank is the metal stamping of sheet, and one of left crank has a square hole, other end There is a circular hole, left short axle is two small axle of lathe car of a round steel, and there is an axial direction centre of the left head end point of left short axle Screwed hole, the right-hand member close-fitting of left short axle is socketed in the circular hole of left crank, and the left end of left short axle is socketed a bearing, and uses a bolt Bearing is positioned in the screwed hole for being fastened to left short axle, described right bent axle is made up of square hole circular shaft, right crank and right short axle, side Hole circular shaft is the axle of a powder metallurgy, and the profile of square hole circular shaft is in cylinder, and the right-hand member of square hole circular shaft has a right convex tenon, side There is the square hole of an axial direction at the left position of hole circular shaft, and square hole justifies axial right-hand member and has a counterbore positioned at the centre of tenon, There is a through hole between the counterbore and square hole of square hole circular shaft, right crank is the metal stamping of sheet, and one of right crank has a mortise, There is a circular hole other end, and right crank is welded in the left surface of chain wheel, and the mortise of right crank is corresponded to the centre of the chain wheel Hole, the chain wheel also on have circular hole corresponding to right crank, the mortise of right crank neutralizes close-fitting in the chain wheel interstitial hole and is socketed In on the tenon of square hole circular shaft, close-fitting is socketed right short axle, right short axle in the corresponding circular hole of the chain wheel and in the circular hole of right crank It is two small axle of lathe car of a round steel, there is the screwed hole of an axial direction centre of the right head end point of right short axle, right short axle Right-hand member is socketed a bearing, and is fastened to a bolt in the screwed hole of right short axle and positions bearing, and the square hole of the right bent axle is justified Axle is penetrated in the bearing block in the endoporus of two bearings from right to left, and the square shaft of the left bent axle is penetrated in described from left to right In the square hole of right bent axle square hole circular shaft, and make the left short axle and the right short axle of the right bent axle of the left bent axle corresponding into 180 °, A bolt is penetrated in the through hole in the right bent axle square hole circular shaft counterbore and be fastened to the screwed hole of the left bent axle square shaft again Middle fixation, makes described left bent axle and the right crank rotation be connected in described bearing block.

8. override type portable bicycle above and below twin beams saddle linkage folding according to claim 1, it is characterized in that：Sleeve is The blank of thick-walled tube, barrel is to be cut into tapped in the pore of cast thick-walled tube, and chute is by the flat metal of a bar shaped Two make circular arc bending, make the circle of the flat metal bending long circle of a bar shaped, the sleeve of treadle described in one, which is rotated, to be socketed on One of the locating shaft, the sleeve of another treadle rotates the other end for being socketed on the locating shaft, and used in described fixed Each twist-on has the bolt with unification pad in the screwed hole at position axle two ends.