CN106240718B - Stretching handle Five-way tube shaft can drag type portable bicycle - Google Patents

Abstract

A kind of stretching handle Five-way tube shaft can drag type portable bicycle, including the handle that stretches, front fork stem, side arm, central sill, middle even component, tow wheel, fork afterwards, vehicle seat, front-wheel, rear-wheel and driving mechanism, flexible handle connection front fork stem and side arm, handle stretch by left handgrip, right handgrip, upper latch fitting, lower latch fitting and knob are constituted, side arm is by rotary part and before connects part and constitutes, central sill is by beam pipe, preceding interior chock, interior chock afterwards, preceding slotware and rear slotware are formed by connecting, middle even component is by main even part, shock resistance block and positioning lock are formed by connecting, fork is by Five-way tube afterwards, two Five-way tubes connect part, shock-absorbing washer, two dropout are formed by connecting, vehicle seat is by seat pipe, lock-connecting piece, connecting rod, saddle and folding location hook are formed by connecting, front-wheel is installed on front axle, rear-wheel is installed on rear fork, driving mechanism is by axis, two cranks, chain wheel, two pedals , flywheel and chain constitute, and be connected in Five-way tube and rear-wheel on.

Description

Stretching handle Five-way tube shaft can drag type portable bicycle

Technical field

The present invention relates to a kind of folding portable bicycles, in particular to a kind of using Five-way tube as shaft --- and it is flexible It can drag type portable bicycle Five-way tube shaft.

Background technique

Have several money folding bicycles currently on the market, although the folding bicycle for having folding rate fast, due to structure and The reasons such as construction, can not also reach the satisfaction being put into knapsack after folding.

Summary of the invention

The invention aims to provide a kind of handlebar in a manner of the new type foldable for the handle type that stretches, rear fork and middle even structure The folding of part is folded by shaft forward downward of Five-way tube, and vehicle seat folds the mode with side arm folding linkage, energy after having folded Enough it is put into knapsack --- stretching handle Five-way tube shaft can drag type portable bicycle.The purpose of the present invention is be achieved 's；Stretching handle Five-way tube shaft can drag type portable bicycle, including flexible handle, front fork stem, side arm, central sill, middle even component, Tow wheel, rear fork, vehicle seat, front-wheel, rear-wheel and driving mechanism, it is characterized in that: flexible handle include left handgrip, right handgrip, on Latch fitting, lower latch fitting and knob, left handgrip and right handgrip are to be formed by the upper end of round tube as right-angle bending, and left handgrip and right handgrip are straight Outside below at angular distortion is provided with threaded hole, and upper latch fitting is made of upper clamping piece, limit film and clamping screw, and upper clamping piece is an aluminium The blank for the type of squeezing, respectively there are the circular hole of a upward and downward in the left and right ends of upper clamping piece, also connect on the circular hole of two upward and downwards of upper clamping piece There is cracking for upward and downward, upper clamping piece upward and downward left and right rearward of cracking respectively is provided with the threaded hole of a upward and downward, upper clamping piece upward and downward The bottom end of the threaded hole of two upward and downward of left and right to crack rearward allows limit film to be connected to folder by two bolt twist-ons, one limit film The bottom side of part, the centre of upper clamping piece have one to crack vertical longitudinal hole with upper clamping piece upward and downward, and the rear end of upper clamping piece longitudinal hole connects The stop nut of a clamping screw is connect, left handgrip and right handgrip penetrate in the circular hole of upper clamping piece left and right ends upward and downward, and will be left Threaded hole below at hand handle and right handgrip right-angle bending corresponds to the bottom side of upper clamping piece, is screwed into left handgrip respectively with two bolts With at right handgrip right-angle bending below threaded hole in, left handgrip and right handgrip and upper clamping piece are made into the limit rotated, also, twist Two bolts being connected in left handgrip and right handgrip cooperate with the limit film of the bottom side that is connected to upper clamping piece, can as left handgrip with Limit when right handgrip is unfolded, clamping screw penetrates in the longitudinal hole of upper clamping piece, and is screwed into stop nut, tightens locking screw Bolt can tighten cracking for upper clamping piece upward and downward, upper clamping piece be locked left handgrip and right handgrip, so that left handgrip and right handgrip are fixed Without being able to rotate；Lower latch fitting is made of lower clamping piece and clamping screw, and lower clamping piece is the blank of an aluminium extruded type, lower clamping piece front Respectively there are the circular hole of a upward and downward in left and right ends, and cracking for upward and downward, lower folder are connected on the circular hole of two upward and downwards of lower clamping piece front There is the circular hole of a upward and downward at the left back end of part, and there are the circular hole of a upward and downward, the centre of lower clamping piece front in lower clamping piece rear end to the right There is one to crack vertical longitudinal hole with lower clamping piece front upward and downward, the rear end of lower clamping piece longitudinal hole connects the locking of a clamping screw Nut, the circular hole of lower clamping piece middle part left end upward and downward and the upper end of front fork stem connect, and front fork stem is by round tube, cylinder and front axle structure At filling in cylinder in the bottom end pore of round tube, there is a cross-perforating in the bottom end of round tube to and together with cylinder, and front axle penetrates round tube It in the cross-perforating of bottom end and cylinder, and stretches out to the right, left handgrip and right handgrip penetrate the circle of lower clamping piece left and right ends upward and downward Kong Zhong, clamping screw penetrate in the longitudinal hole of lower clamping piece, and are screwed into stop nut, and lower clamping piece can be tightened by tightening clamping screw Upward and downward cracks, and lower clamping piece is locked left handgrip and right handgrip, so that left handgrip and right handgrip are fixed and cannot be slided up and down, Knob is connected to the top of left handgrip and right handgrip, and is located at the top of upper clamping piece；Side arm is by rotary part and before connects part and constitutes, Rotary part is installed on the upward and downward circular hole of lower clamping piece rear end to the right, and preceding even part is the slice processing part of aluminium extruded type, preceding even part Front end be in groove profile, the two sides up and down of preceding even part groove profile have mutual to perforation, and the upper and lower of preceding even part rear end respectively has one laterally Perforation, preceding even part groove profile it is mutual rotary part is bolted to lock to being punched through；Central sill include beam pipe, preceding interior chock, after Interior chock, preceding slotware and rear slotware, before close-fitting is filled in the pore of beam pipe front end in chock, preceding interior chock be respectively have up and down it is one vertical To the component of threaded hole, in the pore of beam pipe front end before interior chock be bolted preceding slotware by two, preceding slotware is out There are mutual to perforation, the left and right sides of beam pipe rear end in groove profile part mouthful facing forward, the lower end at left and right sides of preceding slotware, open there are four Mutual cross-perforating, the mutual cross-perforating in four, beam pipe rear portion is symmetrical at upper and lower front and back, and rear interior chock is that quadrangle is each Have the component of a circular hole, it is rear in chock filled in from the pore of beam pipe rear end, and by the circular hole of rear interior chock quadrangle and beam pipe The mutual cross-perforating in rear end four is corresponding, and rear slotware is opening groove profile part facing forward, the left and right sides on rear slotware top Anterior angle has mutual to perforation, and there are four mutual to perforation, four mutual pairs of rear slotware for the left and right sides of rear slotware lower part It perforates corresponding with four mutual cross-perforatings of beam pipe rear end, it is mutual to being punched through to locking spiral shell at left and right sides of preceding slotware Bolt is rotatablely connected with the cross-perforating before connected below part rear end；Middle even component is made of main even part and shock resistance block, and main even part is one There are a transverse holes in the component of aluminum, the back upper place of main even part, are connected with cracking for a transverse direction below main even part back upper place transverse holes, It is main even crack below part upper end hole it is vertical equipped with a pair of bolts nut, there are four cross-perforating in the middle part of main even part, main even part Middle part is also provided with longitudinal threaded hole, and there is a Five-way tube corresponding aperture in the back lower place of main even part, after main even part Five-way tube corresponding aperture Fang Lianyou mono- is lateral to crack, and main even part Five-way tube corresponding aperture rear is cracked vertical equipped with a pair of bolts nut, right with four Bolt is locked by four cross-perforatings of main even part, is fixed together with the rear end of beam pipe and rear slotware and rear interior chock, shock resistance block is logical Bolt is crossed to connect with longitudinal threaded hole in the middle part of main even part；It tows wheel to be constituted by towing central siphon and two tugboats, tows central siphon and wear Enter in the main even transverse holes of part back upper place, and tighten and connect the vertical bolt and nut that cracks below the transverse holes of part back upper place with main, Central siphon will be towed to be fixed in the even transverse holes of main part back upper place, two tugboats are connected to a pair of lock bolt and tow the two of central siphon The outside at end；Fork connects part, two dropout and shock-absorbing baffle by Five-way tube, two Five-way tubes and constitutes afterwards, and Five-way tube is by metal tube It is process, Five-way tube penetrates in the main even Five-way tube corresponding aperture of part, and the left and right ends of Five-way tube are logical in main even part five Stretched out in pipe corresponding aperture, Five-way tube connect part be front be enclose shape, rear portion be in piece shape component, Five-way tube connects to be had above part circle shape Two vertical rods, Five-way tube connect the collar aperture for connecting part circle shape with Five-way tube of cracking between the vertical rod of part two and are connected to, and Five-way tube connects There is mutual longitudinal hole on the vertical rod of part two, Five-way tube, which connects, penetrates bolt and equipped with nut, Five-way tube company in the longitudinal hole of part The rear end of part and the front end of dropout connect, and the circle shape that two Five-way tubes connect part is fixed with the left end of Five-way tube and right part respectively embraces It connects, and the both sides of shock-absorbing baffle is connected to two Five-way tubes and are connected in cracking between the vertical rod of part two, Five-way tube can be with main company The Five-way tube corresponding aperture rotatable engagement of part, and rear fork is enable to fold to inferoanterior, after expansion, it is perpendicular to connect part two positioned at two Five-way tubes Shock-absorbing baffle in cracking between rod can lean with shock resistance block；Vehicle seat includes seat pipe, lock-connecting piece, connecting rod, saddle and folding Folded location hook, seat pipe are made of rectangle seat pipe, upper plug member, lower plug member and circle saddle pipe, and rectangle seat pipe is by the upper end of a rectangular tube Lateral bend forms to the left, and rectangle seat pipe lower end is respectively provided with a cross-perforating up and down, and the trailing flank of rectangle seat pipe lower end is provided with one Long hole, close-fitting fills in plug member in the pore of rectangle seat pipe upper end, and close-fitting fills in lower plug member in the pore of rectangle seat pipe lower end, and So that the cross-perforating of lower plug member or more is corresponded to the cross-perforating of rectangle seat pipe lower end or more, keeps the fluting of lower plug member backward corresponding In the long hole of the rear side of rectangle seat pipe lower end, circle saddle pipe is fixedly connected by two bolts with upper plug member, the lower transverse direction of seat pipe lower end It is punched through and perforation is rotatablely connected to above angle is mutual before lock bolt and the rear slotware left and right sides, rectangle seat pipe lower end trailing flank Long hole neutralize the lock-connecting piece that is slidably connected in the lower fluting of plug member backward, lock-connecting piece can be locked with the upper edge of rear slotware trailing flank It connects, the rear end of the upper cross-perforating rotation connection connecting rod of seat pipe lower end, connecting rod is pressed by the rear and front end of a metal round steel The component of right-angle bending, is respectively provided with a threaded hole before and after connecting rod at the two-end-point of right-angle bending, the front end of connecting rod and after before connecting part The cross-perforating rotation connection of end top, saddle are connected on round saddle pipe, fold the right side that location hook is connected to beam pipe front end； Front-wheel is installed on front axle, and rear-wheel is installed on the rear end of two dropout, lock-connecting piece is opened, and by vehicle seat collapsed forward, in connecting rod Under effect, vehicle seat is inconjunction with side arm, flexible handle, front fork stem and front-wheel and folds together to the lower section of central sill, reaches perfect folding Folded effect, and under the action of folding location hook seat pipe, vehicle seat, side arm, flexible handle, front fork stem and central sill are fixed on together Folded state；Driving mechanism includes that axis, two cranks, chain wheel, two pedals, flywheel and chain, central axis are connected to Five-way tube In, two cranks are installed on the both ends of axis, and chain wheel is fixedly connected on the crank on the right of two cranks, and flywheel is connected to the right side of rear-wheel Side, chain are wire-wrapped on chain wheel and flywheel.

The beneficial effects of the present invention are: the present invention passes through the ingenious cooperation of profile piece, so that entire vehicle frame is not all welded Welding, represents a kind of new trend of the manufacturing process of bicycle；Handlebar of the invention uses the form of flexible handle, so that vehicle Folding reached both most simple, and reach most effective；Front fork stem is connected to the upward and downward circular hole of the right end in the middle part of lower clamping piece In, the upward and downward circular hole of lower clamping piece rear end to the right connects rotary part, and central sill is located at position to the right, so that folded rear-wheel Lower clamping piece connection front fork stem can be located at and connected in the U-shaped opening between rotary part, the folded present invention is made to have accomplished pole It causes small and exquisite；The cooperation of preceding rotating member of the invention using side arm and the rotary part for being connected to lower clamping piece rear end to the right, rotation It include plane bearing and shock-absorbing polyurethane cylinder in component, rotating member is both simple before allowing and effectively and also has incabloc function； For central sill in such a way that beam pipe connects preceding slotware and rear slotware, middle even component is using main even part, shock-absorbing substrate, two shock resistance blocks and determines The mode connected is locked with rear fork in such a way that Five-way tube, two Five-way tubes connect part, two dropout connect, so that of the invention in position Rear fork and can have the effect of rear shock-absorbing with middle even elements fold, and tow wheel and can also be installed on the upper of middle company's component End, so that the present invention can tow after folding；The lower cross-perforating of seat pipe lower end and rear slotware are rotatablely connected, seat pipe lower end it is upper The connection of the rear end thereof of cross-perforating and connecting rod so that linkage structure also accomplished it is ultimate attainment simple.

Detailed description of the invention:

Fig. 1 is schematic structural view of the invention；

Fig. 2 is the expanded schematic diagram of the flexible handle of the present invention；

Fig. 3 is the gathering schematic diagram of the flexible handle of the present invention；

Fig. 4 is the schematic diagram for connecting component in the present invention；

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

Fig. 6 is that present invention folding finishes figure；

In figure: 1 --- flexible handle, 2 --- front fork stem, 3 --- side arm, 4 --- central sill, 51 --- in connect component, 52 --- tow wheel, 53 --- rear fork, 6 --- vehicle seat, 71 --- front-wheel, 72 --- rear-wheel, 8 --- driving mechanism；Wherein Flexible handle 1 further include: 11 --- left handgrip, 12 --- right handgrip, 13 --- upper latch fitting, 14 --- lower latch fitting, 15 --- it draws Hand；Vehicle seat 6 further include: vehicle seat 6 further include: 61 --- seat pipe, 62 --- lock-connecting piece, 63 --- connecting rod, 64 --- saddle, 65 --- fold location hook.

Specific embodiment:

According to Fig. 1, the stretching handle Five-way tube shaft can drag type portable bicycle, including flexible handle 1, front fork stem 2, side arm 3, central sill 4, it is middle even component 51, tow wheel 52, rear fork 53, vehicle seat 6, front-wheel 71, rear-wheel 72 and driving mechanism 8；

The flexible handle 1 includes left handgrip 11, right handgrip 12, upper latch fitting 13, lower latch fitting 14 and knob 15, described Left handgrip 11 and the right handgrip 12 are all to be formed by the upper end of round tube as right-angle bending, the left handgrip 11 and the right hand Outside below at 12 right-angle bendings is respectively provided with a threaded hole, the threaded hole difference of the left handgrip 11 and the right handgrip 12 Corresponding to the bottom side of upper 13 upper clamping piece of latch fitting, it is straight to the left handgrip 11 and the right handgrip 12 that twist-on is distinguished with two bolts At angular distortion in the threaded hole of lower outer, be connected to the left handgrip 11 and the right handgrip 12 bolt be located at it is described The side of the bottom side of upper 13 upper clamping piece of latch fitting, 12 lower end of the left handgrip 11 and the right handgrip is respectively provided with a threaded hole, described It, can be as the left handgrip 11 and the right side after left handgrip 11 and 12 lower end side threaded hole of the right handgrip are screwed into bolt The limit that hand handle 12 and lower 14 lower clamping piece of latch fitting slide up and down.

The upper latch fitting 13 is made of upper clamping piece, limit film and clamping screw, and the upper clamping piece is an aluminium extruded type Respectively there are the circular hole of a upward and downward in blank, the left and right ends of the upper clamping piece, go back on the circular hole of two upward and downwards of the upper clamping piece It is connected with cracking for upward and downward, respectively there are the circular hole of a upward and downward, the upper clamping piece in upper clamping piece upward and downward left and right rearward of cracking Upward and downward crack two upward and downward of left and right rearward circular hole in tapping at threaded hole, the upper clamping piece upward and downward cracks a left side rearward The bottom end of the threaded hole of right two upward and downwards allows the limit film to be connected to described by limit film described in two bolt twist-ons one The bottom side of upper clamping piece, and be located at the upper clamping piece upward and downward and crack rearward, the limit film is both ends portion with holes Part is connected to the limit film of the upper clamping piece bottom side, be connected in the left handgrip 11 and the right handgrip 12 two Bolt cooperation, limit when can be unfolded as the left handgrip 11 and the right handgrip 12, the centre of the upper clamping piece has One cracks vertical longitudinal hole with the upper clamping piece upward and downward, and the rear end of the upper clamping piece longitudinal hole is connected with a counterbore, it is described on The stop nut that a clamping screw is inlayed in the counterbore of folder, upper clamping piece upward and downward can be tightened by tightening the clamping screw Crack, upper clamping piece is locked into left handgrip and right handgrip so that left handgrip and right handgrip are fixed without being able to rotate, the locking Bolt is by bolt and screws handle and is formed by connecting, and the clamping screw further includes having stop nut.

The lower latch fitting 14 is made of lower clamping piece and clamping screw, and the lower clamping piece is the blank of an aluminium extruded type, Respectively there are the circular hole of a upward and downward in the left and right ends of the lower clamping piece front, go back on the circular hole of two upward and downwards of the lower clamping piece front It is connected with cracking for upward and downward, there is the circular hole of a upward and downward at the left back end of the lower clamping piece, and lower clamping piece rear end to the right has one The circular hole of upward and downward has the U-shaped opening of an opening backward, the lower clamping piece between the left back end of lower clamping piece and rear end to the right The width of tire of width and rear-wheel of U-shaped opening is corresponding, the upward and downward circular hole and the front fork at the left back end of lower clamping piece The round tube close-fitting of bar 2 is corresponding, and the front fork stem 2 is made of round tube, cylinder and front axle, fills in circle in the bottom end pore of round tube There is a cross-perforating in the bottom end of column, round tube to and together with cylinder, and front axle penetrates in the bottom end of round tube and the cross-perforating of cylinder simultaneously It stretches out to the right, the upper end close-fitting of the upward and downward circular hole at the left back end of lower clamping piece and 2 round tube of front fork stem is socketed, the lower folder The centre of part has one to crack vertical longitudinal hole with lower clamping piece upward and downward, and the rear end of the lower clamping piece longitudinal hole is connected with a lock The stop nut of tight bolt, the left handgrip 11 and the right handgrip 12 penetrate lower clamping piece left and right ends upward and downward In circular hole, the clamping screw is penetrated in the longitudinal hole of the lower clamping piece, and is screwed into stop nut, tightens the locking Bolt can tighten cracking for lower clamping piece upward and downward, by the lower clamping piece locking left handgrip 11 and the right handgrip 12, so that the left handgrip 11 and the right handgrip 12 are fixed and cannot be slided up and down.

The knob 15 is a plastic part, and two lower ends of the knob 15 are respectively connected with the circle of a upward and downward, the knob The aperture of 15 two circle collar aperture is corresponding with the outer diameter of the left handgrip 11 and the right handgrip 12, and the top of the knob 15 is Two collar aperture of the handle of one knob, the knob 15 are socketed on respectively under 12 knee of the left handgrip 11 and the right handgrip Side, the knob 15 are located at the top of the upper clamping piece.

The side arm 3 includes rotary part and before connects part, and the rotary part includes front axle tube, two zanjon axis It holding, a plane bearing and has a shock-absorbing polyurethane cylinder, the upper and lower side of front axle tube pore is respectively milled with the counterbore for placing rotation zanjon bearing, Close-fitting is pressed into the upward and downward circular hole of lower clamping piece rear end to the right front axle tube from bottom to top, before two zanjon bearings are embedded in respectively In the counterbore of central siphon upper and lower side, plane bearing is lining on the zanjon bearing of the front axle tube upper end, then by shock-absorbing polyurethane cylinder Be put on plane bearing, the axial direction of shock-absorbing polyurethane cylinder has a hole, and by the inner hole of two zanjon bearings, plane bearing axis hole and The hole of shock-absorbing polyurethane cylinder, corresponding to connect before described part front end groove profile or more two sides it is mutual to perforation, with to lock bolt By the rotatable parts with it is described before connect the groove profile of part and connect, the slice processing part that part is aluminium extruded type is connected before described, it is described Respectively there is a lateral perforation in the front end of preceding even part in the upper and lower of groove profile, rear end, and the two sides up and down that part groove profile is connected before described are provided with It is mutual to perforation, the two sides up and down that part groove profile is connected before described strike out fillet.

The central sill 4 includes beam pipe, preceding interior chock, rear interior chock, preceding slotware, rear slotware and shock-absorbing lever, described Beam pipe is made of level metal rectangular pipe, the left and right sides of beam pipe rear end, opens there are four mutual cross-perforating, after the beam pipe Hold four mutual cross-perforatings symmetrical at upper and lower front and back, interior chock before close-fitting is filled in the pore of beam pipe front end, The preceding interior chock is the cutting off processing part by respectively there is the rectangular aluminium profile of a circular hole up and down, above and below the preceding interior chock It is tapped in two circular holes, the front and back of beam pipe left and right side front end, before being inconjunction with described in the pore of beam pipe front end Interior chock is provided with two lateral perforation, and the preceding interior chock is fixedly connected on to the pore of beam pipe front end with two pairs of lock bolts In, and the folding location hook 65 of the related vehicle seat 6 is fixedly connected on the right side of beam pipe front end, and the preceding slotware is The groove profile part facing forward of being open is struck out by sheet metal, the lower end at left and right sides of the preceding slotware have it is mutual to perforation, before described Bottom surface respectively has a hole up and down after slotware, and the upper lower opening of bottom surface by two bolts and is located at beam pipe front end pore after the preceding slotware In preceding interior chock twist-on fix, at left and right sides of the preceding slotware it is mutual to be punched through to lock bolt and it is described before connect part after The cross-perforating rotation connection of end lower section.

The rear interior chock is the component for respectively having a circular hole by one or four jiaos, pore of the interior chock from beam pipe rear end after described In fill in, and will it is described after in chock quadrangle circular hole, respectively with four mutual cross-perforatings of beam pipe rear end Corresponding, the rear slotware is that the groove profile part facing forward that is open is struck out by sheet metal, the left and right sides on the rear slotware top Anterior angle have it is mutual to perforation, it is described after slotware lower part the left and right sides there are four mutual cross-perforating, it is described after slotware Four mutual cross-perforatings, it is corresponding with four mutual cross-perforatings at beam pipe rear portion.

Connecting component 51 in described includes main even part, shock resistance block and positioning lock, and the main even part is by an Al squeezing material There are a transverse holes, the lower section of the main even part back upper place transverse holes in the component being reprocessed into after slice, the main even part back upper place Be connected with one it is lateral crack, crack below the main even part back upper place transverse holes it is vertical have it is one longitudinal mutual to perforation, institute It states that main even part is longitudinally mutual to penetrate a bolt to perforation and equipped with a nut twist-on, it is longitudinally mutual to tighten the main even part The transverse holes of the main even part back upper place can be tightened to the bolt and nut in perforation, worn in the middle part of the main even part there are four lateral Hole, four cross-perforatings in the main even part middle part are corresponding with the mutual cross-perforating in beam pipe rear end four, the main company There is longitudinal threaded hole in the middle part of part, the transverse direction of the main even part back lower place has a Five-way tube corresponding aperture, and the main even part five is logical The rear of pipe corresponding aperture be connected with one it is lateral crack, what the main even part Five-way tube corresponding aperture rear was cracked vertical has a vertical phase It is mutual to perforation, the main even part it is vertical it is mutual a bolt is penetrated to perforation and equipped with a nut twist-on, main company described in twist-on The vertical mutual bolt and nut in perforation of part can be adjusted Five-way tube corresponding aperture to loose with the Five-way tube rotatable engagement Tight appropriate level, the main even part Five-way tube corresponding aperture rear laterally crack above rear end and have a transverse groove that Open Side Down The vertical twist-on of type, the main even part transverse direction groove profile right end has a bolt.

With four to lock bolt by it is described it is main even part four cross-perforatings, with the rear end of the beam pipe and rear slotware and after Interior chock is fixed together, and the shock resistance block is the shock resistance block of the rectangular block shape made of polyurethane, is had on the shock resistance block Through-hole, the rear end of the through-hole of the shock resistance block are connected with counterbore, and the shock resistance block respectively passes through vertical in the middle part of bolt and the main even part To threaded hole connection, it is described it is main even part lateral groove profile in positioning lock is installed, positioning lock is by lock tongue, round bar, spring and toggle It constitutes, lock tongue is made of metal square cotter, and the metal square cotter of lock tongue is corresponding with the main even lateral groove profile of part, the left end of lock tongue In the lock tongue shape of door lock, the right end of lock tongue connects round bar, and the trailing flank of lock tongue connects toggle, and toggle is twisted by a button-headed bolt The trailing flank for being connected to lock tongue forms, and spring is socketed on round bar, and lock tongue, round bar are inconjunction with the transverse direction that spring is placed in the main even part In groove profile, so that the right end of spring is resisted the main even vertical bolt of part transverse direction groove profile right end, make the button-headed bolt of toggle Screw slide cracks in the main even part Five-way tube corresponding aperture rear is lateral, and makes the left end interlocking of lock tongue in the rear fork 53 left side Five-way tube of part connects in the square hole of part.

The wheel 52 that tows is constituted by towing central siphon and two tugboats, is towed the blank that central siphon is metal circular tube, is towed Central siphon penetrates in the main even transverse holes of part back upper place, and will penetrate below the main even part back upper place transverse holes vertical indulge of cracking It is tightened to the mutual screw bolt and nut in perforation, central siphon will be towed and be fixed in the even transverse holes of main part back upper place, Two tugboats are connected to the outside for towing the both ends of central siphon with a pair of of lock bolt again, tugboat is the PU wheel of plastic wheel hub, PU wheel two A deep groove ball bearing is respectively inlayed in the centre of side, is also lined with a lining ring between two deep groove ball bearings of PU wheel, two tugboats open shelves Less than the shelves of opening of crank described in two, and positioned at the inside for opening shelves of crank described in two.

The rear fork 53 connects part, shock-absorbing baffle and two dropout by Five-way tube, two Five-way tubes and constitutes, and described five is logical Pipe is process by metal tube, and the Five-way tube penetrates in the main even Five-way tube corresponding aperture of part, and described five The left and right ends of siphunculus are being stretched out in the main even Five-way tube corresponding aperture of part, and it is by Al squeezing material that the Five-way tube, which connects part, Slice processing part, the Five-way tube connect part front for circle shape, the Five-way tube connect part circle shape collar aperture and the Five-way tube Outer diameter it is corresponding, the Five-way tube, which connects, two vertical rods above part circle shape, the Five-way tube connects between two rod of part There is one to crack, the Five-way tube connects the collar aperture for connecting part circle shape with Five-way tube of cracking between the vertical rod of part two and is connected to, and described five is logical Pipe, which connects, to be had longitudinal mutual to perforation between the vertical rod of part two, it is longitudinally mutual to penetrating spiral shell in perforation that the Five-way tube connects part Bolt, and one end twist-on nut of bolt, the Five-way tube connect the rear portion of part circle shape in piece shape, and the Five-way tube connects part piece shape There is a lateral rectangular opening in front end, and there are several threaded holes in the rear end that the Five-way tube connects part piece shape, and two Five-way tubes connect The circle shape of part is respectively with the left and right ends noose of the Five-way tube, and tightening two Five-way tubes, to connect part longitudinally mutual in perforation Screw bolt and nut, two Five-way tubes are connected into part and are respectively fixedly connected in the left and right ends of the Five-way tube.

The shock-absorbing baffle is formed by a metal stamping, and respectively there are a hole, the shock-absorbing in the both sides of the shock-absorbing baffle The both sides of baffle are placed in the Five-way tube and connect cracking between two rod of part, and the two of the shock-absorbing baffle are lateral opening to correspond to two institutes It states Five-way tube and connects between two rod of part longitudinal mutual connect two Five-way tubes by the twist-on of two bolt and nuts to perforation While the left and right ends of part circle shape and the Five-way tube are tightened, the shock-absorbing baffle and two Five-way tubes are connected into two bar of part Fixation of cracking between shape.

The dropout is made of the sheet metal of flat bar, and there are several holes in the front end of the dropout, after described Several holes of forks piece front end connect that several threaded holes of part rear end are corresponding with the Five-way tube, the several holes of dropout There is a wavy bending at rear, and there is the U-shaped gap of an opening backward in the rear end of the dropout, the two dropout bilateral symmetries, Two dropout pass through several bolts respectively to be connect with the rear end that two Five-way tubes connect part, after connecting with main company's part It is described after fork 53, can using Five-way tube be axis and it is main company part Five-way tube corresponding aperture rotatable engagement, make the rear fork 53 Can be folded to inferoanterior, after expansion, be connected to two Five-way tubes connect two rod of part crack in the shock-absorbing baffle can be with institute The shock resistance block stated leans.

The vehicle seat 6 includes seat pipe 61, lock-connecting piece 62, connecting rod 63, saddle 64 and folds location hook 65, the seat pipe 61 by rectangle seat pipe, upper plug member, lower plug member and circle saddle pipe constitute, the rectangle seat pipe be by a rectangular tube upper end to the left It is bent, rectangle seat pipe lower end is respectively provided with a cross-perforating up and down, and the trailing flank of rectangle seat pipe lower end is provided with One long hole, close-fitting fills in the upper plug member in the pore of rectangle seat pipe upper end, and the upper plug member is that respectively had by front and back The cutting off processing part of the rectangular aluminium profile of one circular hole, tapped, the rectangle seat pipe in two circular hole of front and back of the plug member Upper end is inconjunction with the upper plug member and hits the person together pin reinforcing, and close-fitting fills in lower plug in the pore of rectangle seat pipe lower end Part, the lower plug member be the component of the rectangular block shape as made of nylon injection-molding, and the trailing flank of the lower plug member has one backward There are a upward counterbore in fluting, the top that the lower plug member is slotted backward, and the left and right sides of the lower plug member respectively has one up and down Cross-perforating, the lower plug member from bottom to top fill in the pore of rectangle seat pipe lower end by close-fitting, and makes the lower plug Cross-perforating above and below part corresponds to the cross-perforating of rectangle seat pipe lower end or more, makes the fluting pair of the lower plug member backward The long hole of the rear side of rectangle seat pipe lower end described in Ying Yu, the circle saddle pipe is process by metal circular tube, the round saddle pipe The front and back of rear end is respectively provided with one radial to perforation, and two pairs of the round saddle pipe rear end are punched through two bolts and the upper plug member Two threaded holes be fixedly connected, the lower cross-perforating of 61 lower end of seat pipe pass through to lock bolt and it is described after at left and right sides of slotware Preceding upper angle is mutual to be rotatablely connected perforation, and the long hole of rectangle seat pipe lower end trailing flank neutralizes the lower plug member opening backward Be slidably connected the lock-connecting piece in slot, and the lock-connecting piece 62 is made of flat pin, lock tongue and spring, spring be put into it is described under In the fluting of plug member backward, and the upper end of spring is located in the upward counterbore of the lower plug member, then the lower plug member backward Fluting in penetrate flat pin, respectively have a longitudinal threaded hole up and down in the middle part of flat pin, lock tongue is a block-like metal parts, The lower end of lock tongue is in the lock tongue shape of door lock, and respectively there is a longitudinal perforation in the upper end of lock tongue up and down, and the perforation above and below lock tongue is logical It crosses two bolts to be fixedly connected with the threaded hole above and below flat pin, lock tongue under the action of the spring can be with the rear slotware trailing flank Upper edge interlocking, the rear end of the connecting rod 63 are penetrated from left to right in the upper cross-perforating of the seat pipe lower end, and blending bolt is twisted It is connected in the threaded hole of 63 rear end of connecting rod and positions, the connecting rod 63 is pressed into directly by the rear and front end of a metal round steel The component of angle bending is respectively provided with a threaded hole, the front end of the connecting rod 63 at the two-end-point of the 63 front and back right-angle bending of connecting rod It is penetrated in the cross-perforating above preceding even part rear end from left to right, blending bolt is fastened to the threaded hole of 63 front end of connecting rod Middle positioning, the saddle 64 are connected on the circle saddle pipe, and the folding location hook 65 is by a sheet of spring steel Top rivet a hook-type nylon part, it is described fold location hook the lower end hole You Liang, the foldings location hook 65 pass through two spiral shells Bolt is fixedly connected with two lateral threaded holes of beam pipe front end right side.

The front-wheel 71 is 8 inches of wheel, and the front-wheel 71 is installed on the front axle, and the rear-wheel 72 is 10 inches of wheels, the both ends of 72 wheel shaft of rear-wheel pass through the cooperation of nut respectively, are fixedly connected on 53 liang of rear forks of the rear fork In the U-shaped gap of piece.

Push lock tongue aside upwards, and by 6 collapsed forward of vehicle seat, under the action of connecting rod 63, the vehicle seat 6 Side arm 3, the flexible handle 1, the front fork stem 2 and the front-wheel 71 are inconjunction with together to the central sill 4 Lower section fold, and be located at the rear-wheel 72 in the U-shaped opening backward between the left back end of lower clamping piece and right rear end so that The folded present invention has accomplished ultimate attainmently small and exquisite, reaches perfect folding effect, and in the 65 clasp joint institute of folding location hook Under the action of stating seat pipe 6, together by the side arm 3, the flexible handle 1, the front fork stem 2 and the central sill 4 It is fixed on folded state.

The driving mechanism 8 includes axis, two cranks, chain wheel, two pedals, flywheel and chain, and the axis passes through Axis accessory is connected in the Five-way tube, and crank described in two is installed on the both ends of the axis, and the chain wheel is fixed Be connected on the right crank of two cranks, pedal described in two be connected to two described on crank, the flywheel It is connected to the right side of the rear-wheel 72, the chain is wire-wrapped on the chain wheel and the flywheel.

Claims (8)

1. a kind of stretching handle Five-way tube shaft can drag type portable bicycle, including flexible handle, front fork stem, side arm, central sill, in Connect component, tow wheel, rear fork, vehicle seat, front-wheel, rear-wheel and driving mechanism, it is characterized in that: flexible handle includes left handgrip, the right side Hand handle, upper latch fitting, lower latch fitting and knob, left handgrip and right handgrip are to be formed by the upper end of round tube as right-angle bending, left handgrip and Outside below at right handgrip right-angle bending is provided with threaded hole, and upper latch fitting is made of upper clamping piece, limit film and clamping screw, upper folder Respectively there are the circular hole of a upward and downward in the left and right ends of part, are also connected with cracking for upward and downward on the circular hole of two upward and downwards of upper clamping piece, on Folder upward and downward left and right rearward of cracking respectively is provided with the threaded hole of a upward and downward, and upper clamping piece upward and downward cracks on left and right two rearward It is lower to the bottom end of threaded hole pass through common one limit film of twist-on of a bolt respectively, allow limit film to be connected to the bottom side of upper clamping piece, The centre of upper clamping piece has one to crack vertical longitudinal hole with upper clamping piece upward and downward, and the rear end of upper clamping piece longitudinal hole connects a locking screw The stop nut of bolt, left handgrip and right handgrip penetrate in the circular hole of upper clamping piece left and right ends upward and downward, and by left handgrip and the right hand The bottom side for threaded hole below at right-angle bending being corresponded to upper clamping piece, is screwed into left handgrip with two bolts respectively and right handgrip is straight In threaded hole below at angular distortion, the rotation of left handgrip and right handgrip is limited as upper clamping piece, clamping screw penetrates It in the longitudinal hole of upper clamping piece, and is screwed into stop nut, cracking for upper clamping piece upward and downward can be tightened by tightening clamping screw；Lower lock Part is made of lower clamping piece and clamping screw, and respectively there are the circular hole of a upward and downward in the left and right ends of lower clamping piece front, lower clamping piece front Cracking for upward and downward is connected on the circular hole of two upward and downwards, there is the circular hole of a upward and downward at the left back end of lower clamping piece, and lower clamping piece is to the right There is a circular hole of a upward and downward in rear end, and the centre of lower clamping piece front has one to crack vertical longitudinal hole with lower clamping piece front upward and downward, The rear end of lower clamping piece longitudinal hole connects the stop nut of a clamping screw, the circular hole and front fork stem of left end upward and downward in the middle part of lower clamping piece Upper end connection, front fork stem is made of round tube, cylinder and front axle, cylinder is filled in the bottom end pore of round tube, the bottom end of round tube is simultaneously Have a cross-perforating together with cylinder, front axle is penetrated in the bottom end of round tube and the cross-perforating of cylinder, and is stretched out to the right, left handgrip and Right handgrip penetrates in the circular hole of lower clamping piece left and right ends upward and downward, and clamping screw penetrates in the longitudinal hole of lower clamping piece, and is screwed into In stop nut, cracking for lower clamping piece upward and downward can be tightened by tightening clamping screw, and knob is connected to the upper of left handgrip and right handgrip Portion, and it is located at the top of upper clamping piece；Side arm is by rotary part and before connects part and constitutes, and rotary part is installed on lower clamping piece rear end to the right Upward and downward circular hole on, it is preceding even part front end be in groove profile, it is preceding even part groove profile two sides up and down have it is mutual corresponding to perforation, preceding company The upper and lower of part rear end respectively has a cross-perforating, and preceding even part groove profile is mutual corresponding to be bolted rotating part to lock to being punched through Part；Central sill includes beam pipe, preceding interior chock, rear interior chock, preceding slotware and rear slotware, and close-fitting is interior before filling in the pore of beam pipe front end Chock, preceding interior chock are the components for respectively having a longitudinal threaded bore up and down, in the pore of beam pipe front end before interior chock pass through Two are bolted preceding slotware, and preceding slotware is opening groove profile part facing forward, and it is mutual corresponding right that the lower end at left and right sides of preceding slotware has Perforation, the left and right sides of beam pipe rear end are opened there are four mutual corresponding cross-perforating, the mutual corresponding transverse direction in four, beam pipe rear portion Perforate into that upper and lower front and back is symmetrical, it is rear in chock be the component that respectively there is a circular hole in quadrangle, it is rear in chock from the pipe of beam pipe rear end It is filled in hole, and the circular hole of rear interior chock quadrangle is corresponding with the mutual corresponding cross-perforating in beam pipe rear end four, pit Part is opening groove profile part facing forward, and the anterior angle of the left and right sides on rear slotware top has mutual corresponding to perforation, rear slotware lower part There are four mutual corresponding for the left and right sides to perforation, four of rear slotware lower part are mutual corresponding to perforation and beam pipe rear end Four mutual corresponding cross-perforatings are corresponding, mutual corresponding to being punched through to lock bolt and before connect at left and right sides of preceding slotware Cross-perforating rotation connection below part rear end；Middle even component is made of main even part and shock resistance block, and main even part is the portion of an aluminum There are a transverse holes in part, the back upper place of main even part, and cracking for a transverse direction is connected with below main even part back upper place transverse holes, main to connect on part What is cracked below stomidium is vertical equipped with a pair of bolts nut, and there are four cross-perforating, the middle parts of main even part also to open at main even part middle part There is longitudinal threaded hole, there is a Five-way tube corresponding aperture in the back lower place of main even part, and the rear of main even part Five-way tube corresponding aperture is connected with one Lateral cracks, and main even part Five-way tube corresponding aperture rear is cracked vertical equipped with a pair of bolts nut, will to lock bolt with four Main to fix together with the rear end of beam pipe and rear slotware and rear interior chock with four cross-perforatings of part, shock resistance block passes through bolt and master Even longitudinal threaded hole connection in the middle part of part；It tows wheel to be constituted by towing central siphon and two tugboats, tows central siphon and penetrate in main even part It in the transverse holes of back upper place, and tightens and connects the vertical bolt and nut that cracks below the transverse holes of part back upper place with main, central siphon will be towed It is fixed in the main even transverse holes of part back upper place, two tugboats is connected to the outside for towing the both ends of central siphon with a pair of of lock bolt； Fork connects part, two dropout and shock-absorbing baffle by Five-way tube, two Five-way tubes and constitutes afterwards, and Five-way tube is process by metal tube, Five-way tube penetrates in the main even Five-way tube corresponding aperture of part, and the left and right ends of Five-way tube are in main even part Five-way tube corresponding aperture Stretch out, Five-way tube connect part be front be enclose shape, rear portion in piece shape component, Five-way tube, which connects, two vertical bars above part circle shape Shape, Five-way tube connect the collar aperture for connecting part circle shape with Five-way tube of cracking between the vertical rod of part two and are connected to, and Five-way tube connects two vertical bar of part There is mutual corresponding longitudinal hole in shape, Five-way tube, which connects, to be penetrated bolt and be furnished with nut in the longitudinal hole of part, after Five-way tube connects part End is connect with the front end of dropout, and the circle shape that two Five-way tubes connect part fixes amplexis with the left end of Five-way tube and right part respectively, and The both sides of shock-absorbing baffle are connected to Five-way tube to connect in cracking between the vertical rod of part two, Five-way tube can with it is the five of main even part logical Pipe corresponding aperture rotatable engagement, and enable rear fork to inferoanterior fold, after expansion, positioned at two Five-way tubes connect the vertical rod of part two it Between crack in shock-absorbing baffle can lean with shock resistance block；Vehicle seat includes seat pipe, lock-connecting piece, connecting rod, saddle and folds location hook, Seat pipe is made of rectangle seat pipe, upper plug member, lower plug member and circle saddle pipe, and rectangle seat pipe is the upper end lateral bend to the left by a rectangular tube It forms, rectangle seat pipe lower end is respectively provided with a cross-perforating up and down, and the trailing flank of rectangle seat pipe lower end is provided with a long hole, rectangle seat Close-fitting fills in plug member in the pore of pipe upper end, and close-fitting fills in lower plug member in the pore of rectangle seat pipe lower end, and makes in lower plug member Under cross-perforating correspond to rectangle seat pipe lower end above and below cross-perforating, make the fluting of lower plug member backward correspond to rectangle seat pipe The long hole of the rear side of lower end, circle saddle pipe are fixedly connected by two bolts with upper plug member, and the lower cross-perforating of seat pipe lower end passes through pair Upper angle is mutual corresponding before locking at left and right sides of bolt and rear slotware is rotatablely connected perforation, the long hole of rectangle seat pipe lower end trailing flank The lock-connecting piece that is slidably connected in the lower fluting of plug member backward is neutralized, lock-connecting piece can be with the upper edge interlocking of rear slotware trailing flank, seat pipe The rear end of the upper cross-perforating rotation connection connecting rod of lower end, connecting rod is to be pressed into right-angle bending by the rear and front end of a metal round steel Component, be respectively provided with a threaded hole before and after connecting rod at the two-end-point of right-angle bending, the front end of connecting rod and before connect above part rear end Cross-perforating rotation connection, saddle are connected on round saddle pipe, fold the right side that location hook is connected to beam pipe front end；Front-wheel installation In front axle, rear-wheel is installed on the rear end of two dropout, and driving mechanism includes axis, two cranks, chain wheel, two pedals, flywheel and chain Item, central axis are connected in Five-way tube, and two cranks are installed on the both ends of axis, and chain wheel is fixedly connected on the right one of two cranks On the crank of root, flywheel is connected to the right side of rear-wheel, and chain is wire-wrapped on chain wheel and flywheel；There is number in the front end of the dropout A hole, it is corresponding that several holes of the dropout front end and the Five-way tube connect several threaded holes of part rear end, after described There is a wavy bending at the rear in the several holes of forks piece, and there are the U-shaped gap of an opening backward, two rear forks in the rear end of the dropout Piece bilateral symmetry, two dropout pass through several bolts respectively to be connect with the rear end that two Five-way tubes connect part；Described Lock-connecting piece is made of flat pin, lock tongue and spring, and spring is put into the fluting of the lower plug member backward, then the lower plug member to Flat pin is penetrated in fluting afterwards, respectively has a longitudinal threaded hole up and down in the middle part of flat pin, lock tongue is a block-like metal portion Part, the lower end of lock tongue are in the lock tongue shape of door lock, and respectively there are a longitudinal perforation, the perforation above and below lock tongue in the upper end of lock tongue up and down It is fixedly connected by two bolts with the threaded hole above and below flat pin, lock tongue under the action of the spring can be with the rear slotware trailing flank Upper edge interlocking.

2. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the left hand Threaded hole with the right handgrip is corresponded respectively to the bottom side of the upper latch fitting upper clamping piece, the left handgrip and the right handgrip It, can be as in the left handgrip and the right handgrip and the lower latch fitting lower clamping piece after lower end side threaded hole is screwed into bolt The limit of lower slider is connected to the limit film of the upper clamping piece bottom side and is connected in the left handgrip and the right handgrip The cooperation of two bolts, limit when can be unfolded as the left handgrip and the right handgrip.

3. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the upper folder Inlay the stop nut of a clamping screw in the counterbore of part, the clamping screw is by bolt and screws handle and is formed by connecting, The clamping screw further includes having stop nut, there is an opening backward U-shaped between the left back end of the lower clamping piece and right rear end Opening, the width of the lower clamping piece U-shaped opening is corresponding with the width of the tire of rear-wheel, the upward and downward at the left back end of lower clamping piece Circular hole is corresponding with the round tube close-fitting of the front fork stem, upward and downward circular hole and the front fork stem round tube at the left back end of lower clamping piece The socket of upper end close-fitting, the knob is a plastic part, and two lower ends of the knob are respectively connected with the circle of a upward and downward, the knob Top be a knob handle.

4. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the rotation Rotation member includes front axle tube, two zanjon bearings, a plane bearing and has a shock-absorbing polyurethane cylinder, the upper and lower side of front axle tube pore It is respectively milled with the counterbore for placing zanjon bearing, close-fitting is pressed into the upward and downward circular hole of lower clamping piece rear end to the right to front axle tube from bottom to top In, two zanjon bearings are embedded in respectively in the counterbore of front axle tube upper and lower side, and plane bearing is lining in the zanjon axis of the front axle tube upper end On holding, then shock-absorbing polyurethane cylinder is put on plane bearing, the axial direction of shock-absorbing polyurethane cylinder has a hole, and by two zanjons The hole of the inner hole of bearing, the axis hole of plane bearing and shock-absorbing polyurethane cylinder correspond to it is described before connect part front end groove profile up and down two sides It is mutual corresponding to perforation, with to lock bolt by rotatable parts with it is described before connect the groove profile of part and connect.

5. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the master Even part is the component by being reprocessed into after Al squeezing material slice, and main even part described in twist-on is vertical mutual corresponding in perforation Five-way tube corresponding aperture can be adjusted and arrive the appropriate level elastic with the Five-way tube rotatable engagement, the main company by bolt and nut Part Five-way tube corresponding aperture rear, which is laterally cracked above rear end, a lateral groove profile that Open Side Down, the main even part transverse direction groove profile The vertical twist-on of right end has a bolt.

6. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the main company Positioning lock is installed in the lateral groove profile of part, positioning lock is made of lock tongue, round bar, spring and toggle, and lock tongue is made of metal square cotter, The metal square cotter of lock tongue is corresponding with the main even lateral groove profile of part, and the left end of lock tongue is in the lock tongue shape of door lock, the right side of lock tongue End connection round bar, the trailing flank of lock tongue connect toggle, and toggle is that the trailing flank for being fastened to lock tongue by a button-headed bolt forms, circle Spring is socketed on bar, lock tongue, round bar are inconjunction with spring and are placed in the main even lateral groove profile of part, resist the right end of spring The main even vertical bolt of part transverse direction groove profile right end keeps the screw slide of the button-headed bolt of toggle logical in the main even part five Pipe corresponding aperture rear is lateral to crack, and the left end interlocking of lock tongue fork left side Five-way tube after described is made to connect the square hole of part In.

7. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: described five It is the slice processing part by Al squeezing material that siphunculus, which connects part, and there is a lateral rectangular opening in the front end that the Five-way tube connects part piece shape, There are several threaded holes in the rear end that the Five-way tube connects part piece shape, and the shock-absorbing baffle is formed by a metal stamping, described Respectively there is a hole on the both sides of shock-absorbing baffle, and the both sides of the shock-absorbing baffle are placed in the Five-way tube and connect opening between two rod of part Seam, the two of the shock-absorbing baffle are lateral opening correspond to two Five-way tubes connect it is longitudinal mutual corresponding to perforation between two rod of part, By the twist-on of two bolt and nuts, while two Five-way tubes are connected left and right ends tightening of the part circle shape with the Five-way tube, The shock-absorbing baffle and two Five-way tubes are connected to the fixation of cracking between two rod of part.

8. stretching handle Five-way tube shaft according to claim 1 can drag type portable bicycle, it is characterized in that: the connecting rod Rear end penetrated in the upper cross-perforating of the seat pipe lower end from left to right, the front end of the connecting rod is penetrated from left to right in preceding company In cross-perforating above part rear end, the folding location hook is to rivet a hook-type nylon by the top of a sheet of spring steel Part, the lower end hole You Liang for folding location hook, the folding location hook pass through two bolts and beam pipe front end right side Two lateral threaded holes be fixedly connected.