CN101758894B - Bicycle - Google Patents

Abstract

The invention relates to a bicycle which comprises a bicycle frame. The bicycle is characterized in that the bicycle consists of a handle and seat frame and a main bicycle frame; the handle and seat frame is connected with the upper part of the main bicycle frame in an overturning way; and a bidirectional steering control device is arranged in the handle and seat frame. When in common use, the bicycle can change with users, speed and roads; and when in the use for body building and entertainment, the bicycle can be used in ways of normally bicycling or overturning, standing and seating, bending down and lying on back, advancing and retreating.

Description

A kind of bicycle

The application is the application for a patent for invention 200810042727.0 (applying date: on September 10th, 2008, title: dividing an application a kind of bicycle).

Technical field:

The present invention relates to bicycle, particularly a kind of deformable bicycle.

Background technology:

Present bicycle occupation mode is single, and man-vehicle interface solidifies, and can not satisfy the demand of people with its body-building and amusement.

For having addressed this problem many people in effort, like sports type, mini, mountain, cross-country type, sport car type, folded form, performance type or the like, pure bicycle of riding instead of walk is power-assistization.Though item are many, use there is not what difference, people's demand does not show in the car yet, still is only to be the technology of purpose with arrival.What kind of following bicycle is, can not look for answer from car, should be from people's solution of starting with.The core of car is a power, and the power of bicycle is special, be have enjoyment skilled, have performance to desire and conquer the people of sense, and be not pursue arrival, just need the people of process itself.To be equipped with corresponding structure by such " power ", highlight demand recreational and interesting in the process, change car, the car of correcting one's mistakes with modern with following people with the people.In fact in numerous object for appreciation car phenomenons, people's technical ability, individual character, hope, enjoyment are showed, are embodied and be coming, and remaining supports with new structure exactly, expand with changing.

The patent No. be ZL00249063.3's " stepping on the axle drive shaft of wheeled bicycle " in May 16 calendar year 2001 by patented, be the own technology of having withdrawn a claim, because of its intention according to the invention is used.

Summary of the invention:

The invention provides a kind of bicycle, particularly a kind of deformable bicycle.The purpose of distortion is to let the user not receive the restriction of fixed sturcture, and the selection of oneself can be arranged in a plurality of positions and certain limit, and it is out of shape problem to be solved and is, but confirms the position and the mode of its independent variation, and it comprises:

A. handlebar itself should be able to satisfy anteroposterior selection.

B. vehicle frame must be divided into turnover upper and lower structure, makes handle, seat and two-wheeled transposition, and it is main car frame down, is seat on it.

C. turn to the use that wheel carrier should be able to multi-angle.

D. drive the use that wheel carrier should be able to multi-angle.

E. drive wheel itself change advance towards problem.

F. car is sat should have more change in location.

G. the car ladder must be selected to support on multi-angle, with the different gradients that rise and fall before and after the reply.

The problem that must solve also comprises: but vehicle frame top seat and turn to clutch between the wheel carrier, beidirectional turns to control problem; Turn to the steerage gear problem of the variable angle of wheel carrier own; Turn to the car body of wheel carrier one end that the variation of rising and falling should be arranged; Turn to wheel carrier that fork guard must be set; The structure problem of backrest is supported, locatees, reached in the front and back that car is sat; Its orientation of the position of each independent variation, decide the structure problem of angle, location.

Problem to be solved by this invention is achieved by following technical proposals respectively:

The technical scheme of problem a is: handlebar is by left and right handle and turn to barre to form; Said left and right handle is provided with decides the angle folder; The in addition end of said left and right its handle of handle respectively with turn to connecting of barre variable angle; Make its handle of left and right handle can before and after to the angle of displacement, by decide the angle folder as required clamping decide the angle.

Promptly the left and right handle of handlebar its with turn to the bottom of barre union end to be respectively equipped with vertical pivot, turning to its top of barre that two vertical axis holes are set, its vertical pivot of left and right handle is separately positioned in two axis holes.

And, being provided with the fixture block mouth that communicates turning on the middle front-back of its two vertical axis hole of barre, this fixture block mouth and both sides axis hole partly intersect; Saidly decide angle folder and be arranged in the fixture block mouth, it comprises two fixture blocks and a two-thread screw, and its centre separately of said two fixture blocks is provided with involutory screw; The both sides of two fixture blocks are provided with the inner concave arc surface towards left and right handle vertical pivot; And be affixed on respectively before and after it, connecting two fixture blocks by two-thread screw, said two-thread screw is provided with pulls mouth; The screw thread of its double end is divided into left and right rotation direction, and matches with the involutory screw of two fixture blocks.

The technical scheme of problem b is: vehicle frame is by forming seat and main car frame, and is said the turnover top that is connected in main car frame of seat, saidly is provided with the beidirectional steering controlling device to seat in it.

Said the turnover top that is connected in main car frame of seat; Be the middle part of seat to be set a sagging screw rod; In the middle part of main car frame, in it circular nut is set, its both sides are provided with block card, and it is the circular nut axial location that this block card relies on main car frame; Said sagging screw rod connects with circular nut, has raised making it upset behind the seat through reversing circular nut.

It has ratchet said circular nut, and outside it, is provided with spanner, and the collar of this spanner hangs over outside the ratchet, is provided with ratchet, steamboat, steamboat bar, spring in the spanner; Said ratchet is to be teeth groove with a plurality of holes; Between two holes to be a kind of special ratchet of tooth, said ratchet is cylindric, and its ratchet head is provided with the curve slope that extends to shoulder; End is provided with notch in addition; Said steamboat exposes at the rear portion of spanner, and said steamboat bar one of which end connects steamboat, and the other end passes in the notch that spring is inserted in ratchet.

Said the turnover top that is connected in main car frame of seat, be also to be respectively equipped with pitman to the front and back of seat, every end pitman divides left and right, and left and right pitman is provided with the wedge mouth that uses lower inclined plane, and what the pitman at two ends can replace connects with main car frame; Its front and back of said main car frame are respectively equipped with horizontal slotted eye, the coincidence hole of this slotted eye side of being, circle, and both sides of square hole are provided with the vertical core of left and right pitman before and after it; One double end screw rod is set respectively in the slotted eye of said front and back; And being respectively equipped with the circular nut of band wedge head in the both sides of two-thread screw, its two wedges head is with respect to the inboard of its wedge mouth of left and right pitman, screw during the centre of said two wedge heads is provided with surely; This screw attachment is on the top of square hole; Said two-thread screw is provided with pulls mouth, and the screw thread of its double end is divided into left and right rotation direction, and matches with the circular nut of both sides band wedge head.

Saidly be provided with the beidirectional steering controlling device to seat in it, this device by the last jaw of the disengaging type angle coupler at seat two ends and steel rope thereof with turn to barre to form; Said barre and the upper and lower bearing thereof of turning to is arranged on the front portion seat; Said its driving link of jaw of going up is connected in the bottom that turns to barre; The driven member of last jaw and bearing are arranged on the rear portion seat; Its top of jaw is provided with the double flute godet on the front and back, being connected on two godets of said steel rope staggered form, but its pin-and-hole of jaw is the uncovered of clutch on the said front and back.

The technical scheme of problem c is: wheel flutter has set up angle shift mechanism; This mechanism is by turning to angle support and main car frame to form, and said its front portion of angle support that turns to turns to wheel carrier through upper and lower bearing connection, and the both sides of its top, rear portion are respectively equipped with the angle axle; And connect with main car frame through two angle axles; Turn to the below at its rear portion of angle support to be provided with pole, be provided with the pull unit of variable angle between this pole and the main car frame, said turning in the angle support is provided with steering transmission linkage.

The said pull unit that turns to variable angle between its below pole of angle support and the main car frame; Is made up of angle pull bar that is connected in the pole rear portion and the running fix card that relies on main car frame, said running fix card comprises down fixture block, goes up fixture block, two screws, depression bar, and said main car frame is respectively equipped with inner rib plate in two continuous nation inboards before and after it; It is upper and lower that said upper and lower fixture block is arranged on two floors; And by the upper and lower connection of two screws of front and back, said depression bar is arranged on two floor tops, and the homalocephalus of one of which end is horizontal between last fixture block and two inner rib plates; The other end is provided with drop-down slider, and said angle pull bar connects with following fixture block.

Said turning between its both sides breeches pipe of wheel carrier and the wheel flutter is provided with the trombone slide that rises and falls, and said trombone slide is connected in the both sides of steering wheel shaft, and is arranged in the breeches pipe of both sides, and breeches pipe its underpart of said both sides is provided with the breeches pipe folder.

The said steering transmission linkage that turns in the angle support; Following jaw by two steering track rods and a disengaging type angle coupler is formed; Said jaw down and bearing thereof are arranged on the top that turns to its pole of angle support, and this time jaw contains cross pin, and the center of this cross pin is concentric with both sides angle axle; Said two steering track rod one of which ends are connected in the middle of the two-layer frame plate that turns under its axostylus axostyle of wheel carrier, and the other end is connected in the middle of the two-layer frame plate on following its axostylus axostyle top of jaw.

Said wheel flutter has set up fork guard, and said fork guard is to be connected in to turn to two of breeches pipe middle part, wheel carrier both sides to help strut, converges on it to be cap, covers on the outer ring that turns to its head bearing of axostylus axostyle, and connects with turning to axostylus axostyle.

The technical scheme of problem d is: the top that drives its left and right side breeches pipe of wheel carrier; With main car frame connecting of back position variable angle wherein; Its rear portion of said main car frame is provided with decides the angle card, and said driving wheel carrier portion thereafter is provided with arcuate struts, and this arcuate struts support is decided the angle card and decided the angle as required.

Its rear portion of said main car frame is provided with the frame pipe that intersects in length and breadth; The two ends of its transverse strands pipe are provided with vertical core, and the said driving wheel carrier arcuate struts of portion thereafter is arranged in the vertical core, saidly decide the angle card and are arranged in length and breadth in the frame pipe that intersects; It is made up of awl bar in vertical pipe and the crowded piece in the transverse pipe of both sides; Its every side of said crowded piece is made up by interior crowded piece and the outer piece that squeezes, and said awl bar is provided with screw thread and pulls mouth, and the end of said vertical Guan Qikong is provided with negative thread.

The technical scheme of problem e is: drive wheel its for to carry the wheeled axle drive shaft of stepping on of foot-driven lever, be provided with turnover connecting device between drive wheel and its driving wheel carrier.

Turnover connecting device comprises between said drive wheel and its driving wheel carrier; Be arranged on two trombone slides of its both sides of drive wheel; With the breeches pipe folder that drives its left and right breeches pipe bottom of wheel carrier, said two trombone slides are arranged on and drive in its left and right breeches pipe of wheel carrier its position separately that cooperates of two trombone slides and left and right breeches pipe; But the transposition of clutch is by breeches pipe folder clamping and positioning.

The breeches pipe of its left and right breeches pipe bottom of said driving wheel carrier folder comprises: fixture block, positive stop, two screws, push rod, hook, tooth bar, transverse axis, torque spring, and Screw, and said left and right breeches pipe its underpart is provided with the fixture block mouth, and said fixture block is buckled on the trombone slide in the fixture block mouth; By the upper and lower screw attachment positive stop of fixture block mouth; Said push rod is the associating push rod of back gear formula, and its left and right lower end is provided with cutting-out bar, and this cutting-out bar is horizontal between positive stop and fixture block; Said hook is connected in the top of push rod by transverse axis and torque spring; The end in addition of hook is provided with argues for the sake of arguing, and this is argued for the sake of arguing and is provided with Screw, and this Screw is a retaining with the top board of push rod; Limit the gradient of other end tooth hook, said tooth bar is connected in the centre of left and right breeches pipe with respect to hook.

The technical scheme of problem f is: car is sat and is comprised that one is arranged on the car at seat rear portion seat underframe; Be arranged on the car that drives on the arcuate struts of wheel carrier rear portion with another and sit underframe; It also comprises and being arranged on the seat posterior segment; And be connected in car and sit the anterior bracing or strutting arrangement that moves, the base that said car is sat its rear portion two nations is provided with the retaining mouth of arrangement, and car is sat with a certain retaining and mouthful is cooperated the location with a certain car seat underframe.

Said car is sat the anterior bracing or strutting arrangement that moves and is comprised: be arranged on that car is sat the outer arcuate tooth bar of front end, mobile card and strut bar that strut is sat two ends are sat, are connected in to the strut that has an arc tooth bar; Said strut is sat and is provided with support rod hole; And radially be provided with gear in this hole; The position that is connected in preceding its radius of outer arcuate tooth bar of car seat of said strut bar one of which end variable angle, the other end is arranged in the hole of strut seat, and its end is provided with the slotted hole that radially intersects; Be provided with the retaining rod in the slotted hole, the gear that this retaining rod relies on strut to sit is controlled the clutch of two tooth bars; Saidly be provided with a centre joint to its top, posterior segment of seat, said mobile card relies on this centre joint, and it comprises with strut sits suspension, ripping bar, trimming screw, the lower plate that connects; It in addition is provided with opening in bottom of end said suspension, and its homalocephalus of ripping bar is horizontal in opening, and homalocephalus is the centre joint under it; Homalocephalus is a trimming screw on it, and said lower plate is located at below the centre joint, before and after it with respect to the bottom of ripping bar with the strut seat; The centre of lower plate is provided with boatswain chair, and the boatswain chair of lower plate connects with the middle part of suspension.

Saidly be arranged on that to sit underframe to the car at seat rear portion be gravity folder underframe; It is made up of a long nut, two interior pushing blocks and left and right outer baffle block, and its inboard of said left and right outer baffle block is respectively equipped with pin, and the head of pin is provided with screw thread; Said long nut is with the pin butt joint of left and right outer baffle block; Said interior pushing block is to be enclosed within on the pin, and its outside forms the folder mouth with outer baffle block, and its inboard is provided with the inclined-plane; Saidly be provided with the slope to its both sides, seat rear portion; The top on two slopes is provided with the pin groove, and the rear portion on two slopes is provided with chute, and said interior its inboard inclined-plane of pushing block cooperates with the slope; Its pin of left and right outer baffle block is suspended from the pin groove; Said its trailing portion of left and right outer baffle block is not provided with and turns head and take bar, and it turns head respectively inwardly, hangs in the chute; The bottom of said outer baffle block and interior pushing block respectively by folder mouthful need connect, the screw thread at its two ends of said long nut is divided into left and right rotation direction.

It is a spring clip underframe that the said car that is arranged on the arcuate struts of driving wheel carrier rear portion is sat underframe, and it is by two bar bolts, two synchronous holding screws, two outer fixture blocks, and two internal clamping blocks, backing pin, spring, two struts are formed; The outer fixture block of said both sides is respectively equipped with bottom outlet, and the inboard of its underpart is respectively equipped with the screw of left and right rotation direction, and this screw communicates with bottom outlet; The inboard on its top is provided with the backing pin hole; The internal clamping block of said backing pin serial spring and both sides, said two struts are separately positioned between the inside and outside fixture block of two side clamp port its underparts, and said two its outer ends of synchronous holding screw connect with the screw of two outer fixture blocks; Its inner connects with thru-bolt; The combination of its single-piece of said spring clip is to be held together to close by the synchronous holding screw and the outer fixture block of two bar bolts with two ends, and makes the bottom outlet of fixture block outside the both sides fall to being sitting on the single head of two arcuate struts, and said synchronous holding screw is used for not that the outer of displacement moves; The single head of locking arcuate struts; The same rotation direction of the internal and external screw thread of himself, same pitch, the screw thread at said pair of its two ends of bar bolt is divided into left and right rotation direction.

Said car is sat and is provided with backrest; Said backrest is provided with the regulation device that goes up and down and lean on distance, and this device comprises: car is sat the carriage of both sides, rear portion, two retaining teeth, spring, left and right retaining tooth bar, locking bar, and it vertically is provided with retaining rack bore and latch arm hole said carriage; Two holes, be large and small crossing coincidence hole, it laterally is provided with retaining tooth hole, and this hole is with to overlap the hole longitudinally crossing; Be provided with transverse tube between two lateral brackets, its pore communicates with the top in retaining tooth hole, and said spring is arranged in the transverse tube; Said two its mastheads of retaining tooth are in the spring both sides, and its tooth and lower plane thereof fall in the retaining tooth hole of two lateral brackets, and its rear portion of said left and right retaining tooth bar is connected firmly by cross bar; Its inboard retaining tooth of arranging has chamfered groove, and its rear portion is provided with latch arm hole longitudinally, and latch arm hole is with respect to the chamfered groove of front portion; Said locking bar is arranged in the latch arm hole, and its front portion is provided with a slotted hole pad, make locking bar rotating with the retaining tooth bar link; Locking bar a section in chamfered groove is a flat bar, and the locking bar that said left and right retaining tooth bar and both sides accompany is arranged on carriage, and it overlaps in the hole longitudinally, and its retaining tooth is relative with the retaining tooth; The flat bar section of its locking bar is relative with the lower plane of retaining tooth, and its rear portion of said left and right retaining tooth bar is provided with the vertical core of backrest, and this vertical core is positioned at the outside of vertical latch arm hole; And partly crossing with vertical locking bar, the bottom of its two montant of said backrest is provided with arc port, and said locking bar is provided with notch on the position with respect to the backrest montant; When backrest rises; The notch of its arc port and locking bar is relative, can reverse locking bar and stop backrest to fall, and the leading portion flat bar of its locking bar can be pushed the retaining tooth that stretches into the retaining tooth open.

The technical scheme of problem g is: the car ladder is made up of the foot-driven lever of terraced bar and pull back spring and inboard; And the bottom of its wheel shaft is provided with a fan-shaped fluted disc behind foot-driven lever; The retractable sidepiece that is connected in foot-driven lever of said terraced bar and pull back spring; Its sidepiece of said foot-driven lever is provided with automatically decides angle apparatus, and this device cooperates with terraced bar and fan-shaped fluted disc, and said fan-shaped fluted disc is moving part not.

Said foot-driven lever is being provided with hole and following hole on its same side, its nearly wheel shaft be last hole, said terraced bar is provided with side shaft, its spring is the torque spring that is arranged on the side shaft; Ladder bar one of which end support ground, the other end is provided with hanging head, and the side shaft of terraced bar is arranged in the following hole of foot-driven lever, and the angle apparatus of deciding of said its sidepiece of foot-driven lever is a hook plate and torque spring thereof; Said hook plate is provided with side shaft, and its torque spring is arranged on the axle, and it is hooked in down, and hook is provided with tooth; The top of hook plate is used for breaking off relations, and takes off tooth, and its side shaft of hook plate connects with the last hole of foot-driven lever, and said terraced its torsion of bar spring is greater than the spring of hook plate; And rotation direction is opposite, and when terraced bar is stressed when putting down, its hook of hook plate connects with the hanging head of terraced bar; The tooth of its hook top can be automatically and fan-shaped fluted disc engagement, and when hook plate top is stressed when hanging head is broken off relations, terraced bar can self-return; Also promote simultaneously the hook plate return, and to pull with hook be retaining, its back side of said foot-driven lever is provided with the axle bumper plate and its pressing plate of two side shafts.

Said its side of terraced bar is provided with the piece that rubs; Its back side of said foot-driven lever is provided with the arc sheet that rubs with respect to the piece that rubs; And having the regulation and control plate at it, this regulation and control plate is provided with regulation and control screw and fixing screw, its regulation and control screw sheet that can rub from the positive ejection of foot-driven lever; Said sheet and regulation and control plate and the pressing plate of rubbing can be one, and the said piece that rubs passes through in the arc sheet outside friction that rubs when terraced bar return.

Beneficial effect of the present invention can be summarized respectively as follows except that conspicuous:

(a). its anteroposterior angle of left and right handle can be the diverse location that car is sat, and different moving velocitys, different body posture and select a shape; When parking such as needs can it be closed up.

(b) though. big the seat difference towards the difference that forms, from using and even the actual effect of vision does not have the branch of primary and secondary; Turn to its following running fix card of connecting of angle pull bar of angle support, its depression bar is attached to the bottom seat, can control the up-down of seat the clamping of locator card or loosens.The pull-down slider of its depression bar bottom can be used for the provisional angle of deciding.

(c). turn to the angle of wheel carrier, both be used to adjust, also be used to satisfy the demands of different of friction speed angle because of using required different angles to the seat upset; The wheel flutter trombone slide is the height that is used to adjust handlebar and car body one end thereof with turning to cooperating of wheel carrier, also is used for when back, reducing the height that car is sat when wheel flutter.Turn to wheel carrier identical with the breeches pipe folder that drives wheel carrier for the breeches pipe folder of its trombone slide location.

(d). the angle that drives wheel carrier shows on the drive wheel it is the variation of front and back position, and it is upper and lower variation that the spring clip car that shows its rear portion is sat on the underframe.Move behind the drive wheel, car is sat will use the spring clip underframe, and this equals that vehicle body is elongated.

(e). drive wheel just its locational variation through forming the upset of seat; The upset of himself is only basic variation; The bicycle of distortion mainly is to form multiple occupation mode around drive wheel; Drive wheel upset itself will in people's body-building and amusement, increase many new usages, like stand-type, one-wheel type, the formula that falls back can both be with different advancing towards use.Even can be shifted to and turn to that wheel carrier is up to be advanced, also can advance or the like by oppositely directed use handlebar.In normal the use, the trombone slide of drive wheel except that being used for upset, also to be used to adjust car sit with ride between distance.

(f). when Vehicular body front rose and fell, car was sat the variation before and after can taking place, and the retaining mouth that car is sat two nation bases, rear portion is used to adjust this variation; Car is sat the clutch of anterior strut bar and strut seat, promptly is used for the engagement of two arc-shaped racks in small angle range and decides the angle, also is used for when vertical the use, increasing height.

(g). the car ladder overturns with drive wheel, can remain on the same side with the user.

Description of drawings:

Fig. 1, Fig. 2, Fig. 3, Fig. 4 are each deformation places of the present invention, its diverse location of living in, different angles or different towards scheme drawing.

Fig. 5 is the birds-eye view of Fig. 4.

Fig. 6 top be handlebar left and right handle its decide the structural representation of angle folder.

Fig. 6 bottom is that Figure 42 is the structural representation at its rear portion its anterior structural representation of beidirectional steering controlling device in the seat.

Fig. 7 is the right elevation on Fig. 6 top, is its angle structural representation of left and right handle.

Fig. 8 is the birds-eye view that left and right handle is decided angle its two fixture block of folder.

Fig. 9 is the overturn structure scheme drawing of seat and main car frame center.

Figure 10 is the birds-eye view of Fig. 9, is the structural representation of its circular nut axial location.

Figure 11 is the upward view of Fig. 9, is the interior ratchet part of its spanner and the structural representation of ratchet.

Figure 12 overlooks, and the draw bail scheme drawing of seat and its front and back of main car frame, the main car frame shown in this figure is and turns to the wheel carrier union end.

Figure 13 is the left view of two-thread screw and left and right band wedge head circular nut among Figure 12.

Figure 14 is the front view of Figure 12.

Figure 15 is the right elevation of the front and back pitman one of which side pitman of seat among Figure 14.

Figure 16 is the pull unit structural representation that turns to variable angle between angle support and the main car frame.

Figure 17 goes up among Figure 16 not have the birds-eye view of seat.

Figure 18 is the cutaway view that the A-A line is prolonged at running fix khaki middle part among Figure 16.

Figure 19 is the right elevation of following fixture block among Figure 16.

Figure 20 is the birds-eye view of following fixture block among Figure 16.

Figure 21 right lower quadrant is to turn to angle support its below pole and joining angle pull bar scheme drawing, and the center is the steering transmission linkage structural representation that turns in the angle support, and its left part is to turn to wheel carrier fork guard topside scheme drawing.

Figure 22 is the cutaway view that the B-B line is prolonged in its ten pins position of disengaging type angle coupler among Figure 21.

Figure 23 is the scheme drawing of following jaw among Figure 22.

Figure 24 is the birds-eye view of its front and back pin head of cross pin among Figure 22.

To be the main car frame rear portion decide angle card scheme drawing for what the drive wheel frame was provided with to Figure 25.

Figure 26 is the birds-eye view of Figure 25, and this figure is a structural representation of deciding the angle card.

Figure 27 is the scheme drawing of awl bar among Figure 26.

Figure 28 is the left view of inside and outside crowded piece among Figure 26.

Figure 29 is the structural representation that drives the left and right breeches pipe of wheel carrier its underpart breeches pipe folder.

Figure 30 is the left view of Figure 29.

Figure 31 is that car is sat the anterior structural representation that moves bracing or strutting arrangement.

Figure 32 is the birds-eye view of Figure 31.

Figure 33 is the left view of Figure 31.

Figure 34 left part is the draw bail scheme drawing that car is sat preceding outer arcuate tooth bar and strut bar, and right part is the structural representation of the car seating back of the body.

Figure 35 is the upward view of Figure 34.

Figure 36 is the left view of Figure 34, and lower left quarter is the structural representation of retaining tooth bar, retaining tooth and locking bar, and right lower quadrant is the structural representation of backrest montant and locking bar.

Figure 37 is the inboard scheme drawing of retaining tooth bar among Figure 34.

Figure 38 is that Figure 37 keeps off the cutaway view that the C-C line is prolonged in its teeth groove position of tooth bar.

Figure 39 is the scheme drawing of locking bar among Figure 34.

Figure 40 overlooks, and is arranged on to sit the underframe scheme drawing to the gravity at seat rear portion folder car.

Figure 41 is long nut among Figure 40, two interior pushing blocks, and left and right outer baffle block structural representation.

Figure 42 right part is the front view of Figure 40 right part, and its left part is the structural representation at its rear portion of beidirectional steering controlling device in the seat.

Figure 43 is that the right side is looked, and is arranged on the spring clip car that drives on the arcuate struts of wheel carrier rear portion and sits the Undercarriage structure scheme drawing.

Figure 44 is the birds-eye view of Figure 43.

Figure 45 is side-looking, car ladder supporting construction scheme drawing.

Figure 46 is the scheme drawing at its terraced bar return rear foot treadle rear portion of car ladder.

Figure 47 is the scheme drawing of fan-shaped fluted disc among Figure 45.

The specific embodiment:

Further describe respectively below in conjunction with the variation of accompanying drawing its each position of the present invention.

In Fig. 1 to Fig. 5; Its two handles front-back direction of the left and right handle of handlebar is different, as shown in the figure, and handlebar is by left and right handle 8 and turn to barre 6 to form; Said left and right handle 8 is provided with decides angle folder 7; The in addition end of said left and right its handle of handle respectively with turn to connecting of barre 6 variable angles, said left and right handle 8 its handles can before and after to the angle of displacement, by decide angle folder 7 as required clamping decide the angle.

The left and right handle 8 of handlebar as shown in Figure 7 its with turn to the bottom of barre 6 union ends to be respectively equipped with vertical pivot 801, said barre 6 its tops that turn to are provided with two vertical axis holes 601, its vertical pivot 801 of left and right handle is separately positioned in two axis holes 601.

Like top, Fig. 7 and shown in Figure 8 of Fig. 6, turn on the front-back of barre 6 its two vertical axis holes, 601 centres, be provided with the fixture block mouth 602 that communicates, this fixture block mouth 602 partly intersects with both sides axis hole 601; Saidly decide angle folder and be arranged in the fixture block mouth 602, it comprises two fixture blocks 701 and a two-thread screw 702, and said two fixture blocks 701 its centres separately are provided with involutory screw 002; The both sides of two fixture blocks are provided with the inner concave arc surface 001 towards left and right handle vertical pivot 801; And be affixed on respectively before and after it, connecting two fixture blocks by two-thread screw 702, said two-thread screw 702 is provided with pulls mouth 003; The screw thread of its double end is divided into left and right rotation direction, and matches with the involutory screw 002 of two fixture blocks.

In Fig. 1 and Fig. 4, handlebar and car sit towards different, position change; As shown in the figure; Vehicle frame is by forming seat 10 and main car frame 11, said the turnover connection of seat 10 23,9 on the top of main car frame 11, saidly be provided with the beidirectional steering controlling device to seat 10 in it.This beidirectional steering controlling device sees also bottom and Figure 42 of Fig. 6.

Like Fig. 9 and shown in Figure 10; The seat 10 turnover tops that are connected in main car frame 11, be the middle part of seat to be set a sagging screw rod 101, a circular nut 231 is set at main car frame 11 middle parts in it; Its both sides are provided with block card 117; It is the circular nut axial location that this block card relies on main car frame 11, and said sagging screw rod 101 connects with circular nut 231, has raised making it upset behind the seat 10 through reversing circular nut 231.

Like Fig. 9 and shown in Figure 11, it has ratchet 004,005 circular nut 231, and outside it, is provided with spanner 232, and the collar 008 of this spanner hangs over outside the ratchet, is provided with ratchet 235, steamboat 236, steamboat bar 234, spring 233 in the spanner; Said ratchet is to be teeth groove 004 with a plurality of holes; Between two holes to be a kind of special ratchet of tooth 005, said ratchet 235 is cylindric, and its ratchet head is provided with the curve slope 006 that extends to shoulder; End is provided with notch 007 in addition; Said steamboat 236 exposes at the rear portion of spanner 232, and said steamboat bar 234 one of which ends connect steamboat, and the other end passes in the notch 007 that spring 233 is inserted in ratchet.

In Figure 12 to Figure 15; Represented the seat 10 turnover tops that are connected in main car frame 11; Be also to be respectively equipped with pitman 102 to the front and back of seat 10; Every end pitman divides left and right, and left and right pitman is provided with the wedge mouth 009 that uses lower inclined plane, and what the pitman 102 at two ends can replace connects with main car frame 11; Said main car frame 11 its front and back are respectively equipped with horizontal slotted eye 111; The coincidence hole of this slotted eye side of being, circle; Both sides of square hole 055 are provided with the vertical core 112 of left and right pitman 102 before and after it, and a double end screw rod 901 is set respectively in the said front and back slotted eye 111, and are respectively equipped with the circular nut 902,903 of band wedge head 010 in the both sides of each two-thread screw; Its two wedges head, 010 inboard with respect to its wedge mouth 009 of left and right pitman; Screw 904 during the centre of said two wedge heads 010 is provided with surely, this screw attachment are on the top of square hole 055, and said two-thread screw 901 is provided with pulls mouth 011; The screw thread of its double end is divided into left and right rotation direction, and matches with the circular nut 902,903 of both sides band wedge head.

In the bottom and Figure 42 of Fig. 6, be beidirectional steering controlling devices in the seat 10, this device is by the last jaw 604,606 of the disengaging type angle coupler at seat two ends and steel rope 603 thereof with turn to barre 6 to form; Said barre 6 and the upper and lower bearing 607 thereof of turning to is arranged on the front portion of seat 10; Said its driving link 606 of jaw of going up is connected in the bottom that turns to barre; The driven member 604 of last jaw and bearing 605 are arranged on the rear portion of seat 10; Its top of jaw is provided with double flute godet 012 on the front and back, being connected on two godets 012 of said steel rope 603 staggered forms, but jaw 604,606 its pin-and-holes are uncovered 013 of clutch on the said front and back.

In Fig. 1 to Fig. 4, turn to wheel carrier 4 different with respect to the angle of main car frame 11, as shown in the figure; Turn to wheel carrier 4 to be provided with angle shift mechanism; This mechanism is by turning to angle support 5 and main car frame 11 to form, and said angle support 5 its front portions that turn to turn to wheel carrier 4 through upper and lower bearing 501 connections, and the both sides of its top, rear portion are respectively equipped with angle axle 503; And connect with main car frame 11 through two angle axles; Turn to the below at its rear portion of angle support to be provided with pole 502, be provided with the pull unit 22 of variable angle between this pole and the main car frame 11, said turning in the angle support is provided with steering transmission linkage.This steering transmission linkage sees also Figure 21 and Figure 22.

Bottom at Figure 21 right lower quadrant and Figure 22; And in Figure 16 to Figure 20, be the pull unit that turns to variable angle between angle support 5 its below poles 502 and the main car frame 11, it is made up of angle pull bar that is connected in pole 502 rear portions 221 and the running fix card that relies on main car frame 11; Said running fix card comprises down fixture block 223, go up fixture block 222, two screws 224, depression bar 225; The two nation inboards that said main car frame 11 links to each other before and after it are respectively equipped with inner rib plate 113, and it is upper and lower that said upper and lower fixture block 223,222 is arranged on two floors 113, and by two screws, the 224 upper and lower connections of front and back; Said depression bar 225 is arranged on two floor tops; The homalocephalus 014 of one of which end is horizontal, and the other end is provided with drop-down slider 226 between last fixture block and two inner rib plates, and said angle pull bar 221 connects with following fixture block 223.

In Fig. 1 to Fig. 4, turn between wheel carrier 4 its both sides breeches pipes 401 and the wheel flutter 1 and be provided with the trombone slide 2 that rises and falls, said trombone slide 2 is connected in the both sides of steering wheel shaft, and is arranged in the breeches pipe 401 of both sides, and breeches pipe 401 its underparts of said both sides are provided with breeches pipe folder 3.

In Figure 21 to Figure 24; It is the steering transmission linkage that turns in the angle support 5; This device is made up of the following jaw 403 of two steering track rods 402 and a disengaging type angle coupler 606,604,403; Said jaw 403 down and bearing 404 thereof are arranged on the top that turns to angle support 5 its poles 502, and this time jaw contains cross pin 405, and the center of this cross pin is concentric with both sides angle axle 503; Said two steering track rods, 402 one of which ends are connected in the middle of the two-layer frame plate 056 that turns under its axostylus axostyle 407 of wheel carrier, and the two-layer frame plate 057 on jaw 403 its axostylus axostyle 058 tops was middle under the other end was connected in.

Shown in the left part of Figure 21; Turn to wheel carrier 4 to be provided with fork guard 406, said fork guard is to be connected in to turn to two of breeches pipe 401 middle parts, wheel carrier both sides to help strut 015, converges on it to be cap 052; Cover on the outer ring that turns to axostylus axostyle 407 its head bearings 501, and connect with turning to axostylus axostyle 407.

In Fig. 1 to Fig. 4; It is different with respect to the angle of main car frame 11, as shown in the figure to drive wheel carrier 19, drives the top 192 of wheel carrier 19 its left and right side breeches pipes 193; With main car frame 11 connecting of back position variable angle wherein; Said main car frame 11 its rear portions are provided with decides angle card 18, and said driving wheel carrier 19 its rear portions are provided with arcuate struts 191, and these arcuate struts 191 supports are decided angle card 18 and decided the angle as required.

Extremely shown in Figure 28 like Figure 25; Main car frame 11 its rear portions are provided with the frame pipe 115,116 that intersects in length and breadth; The two ends of its transverse strands pipe 116 are provided with vertical core 016, and the said driving wheel carrier arcuate struts 191 of portion thereafter is arranged in the vertical core 016, saidly decide the angle card and are arranged in length and breadth in the frame pipe 115,116 that intersects; It is made up of awl bar 183 in vertical pipe 115 and the crowded piece 181,182 in the both sides transverse pipe 116; Its every side of said crowded piece is made up by interior crowded piece 182 and the outer piece 181 that squeezes, and said awl bar 183 is provided with screw thread 017 and pulls mouth 018, and the end in said vertical pipe 115 its holes is provided with negative thread 114.

In Fig. 1 and Fig. 4, from the change of two different its inside and outside positions of foot-driven lever, visible drive wheel advance towards change; As shown in the figure, drive wheel 21 its for to carry the wheeled axle drive shaft of stepping on of foot-driven lever 26, be provided with turnover connecting device 24,25 between said drive wheel 21 and its driving wheel carrier 19; This device comprises, is arranged on two trombone slides 25 of its 266 both sides of drive wheel and the breeches pipe folder 24 of driving wheel carrier 19 its left and right breeches pipe 193 bottoms; Said two trombone slides 25 are arranged on and drive in its left and right breeches pipe 193 of wheel carrier; Two trombone slides 25 and left and right breeches pipe 193 its positions separately that cooperate, but the transposition of clutch is pressed from both sides 24 clamping and positioning by breeches pipe.

In Figure 29 and Figure 30, be the breeches pipe folder that drives wheel carrier 19 its left and right breeches pipe 193 bottoms, it comprises: fixture block 241, positive stop 243, two screws 244, push rod 242, hook 245, tooth bar 246, transverse axis 247, torque spring 248, and Screw 249; Said left and right breeches pipe 193 its underparts are provided with fixture block mouth 065; Said fixture block 241 is buckled in fixture block mouth 065 on the trombone slide 25, and the screw 244 upper and lower by the fixture block mouth connects positive stop 243, and said push rod 242 is the associating push rod of back gear formula; Its left and right lower end is provided with cutting-out bar 019; This cutting-out bar is horizontal between positive stop 243 and fixture block 241, and said hook 245 is connected in the top of push rod 242 by transverse axis 247 and torque spring 248, and the end in addition of hook is provided with argues for the sake of arguing 020; This is argued for the sake of arguing and is provided with Screw 249; This Screw is a retaining with the top board 021 of push rod, limits the gradient of other end tooth hook, and said tooth bar 246 is connected in the centre of left and right breeches pipe 193 with respect to hook.

In Fig. 1 to Fig. 5; The position of car seat 12 is different, and can keep the opposing horizontal state, as scheming as showing; Car is sat 12 and is comprised that one is arranged on the car at seat 10 rear portions seat underframe 16; Be arranged on the car that drives on the wheel carrier 19 rear portion arcuate struts 191 with another and sit underframe 17, it also comprises and being arranged on a seat 10 posterior segments, and is connected in car and sits the anterior bracing or strutting arrangement 15,13 that moves; The base that said car is sat 12 its rear portion two nations is provided with the retaining mouth 121 of arrangement, and car is sat with a certain retaining and mouthful cooperated the location with a certain car seat underframe.Its retaining mouth structure sees also Figure 34.

Left part at Figure 34 and Figure 35; And in Figure 31 to Figure 33; Be that car is sat the 12 anterior bracing or strutting arrangements that move, it comprises and is arranged on that car is sat the outer arcuate tooth bar 123 of 12 front ends, the strut that has an arc tooth bar 022 is sat 132, is connected in mobile card and strut bar 133 that strut is sat two ends; Said strut is sat 132 and is provided with support rod hole 023; And radially be provided with gear 053 in this hole; The position 024 that is connected in preceding outer arcuate tooth bar 123 its radiuses of car seat of said strut bar 133 one of which end variable angles, the other end is arranged in the hole 023 of strut seat, and its end is provided with the slotted hole 025 that radially intersects; Be provided with retaining rod 131 in the slotted hole, the gear 053 that this retaining rod relies on strut to sit is controlled the clutch of two tooth bars 022,123; Saidly be provided with a centre joint 104 to seat 10 its tops, posterior segment, said mobile card relies on this centre joint 104, and it comprises with strut sits suspension 153, ripping bar 154, trimming screw 151, the lower plate 152 that connects; Said suspension 153 its bottoms of holding in addition are provided with opening 026; Ripping bar 154 its homalocephalus 027 are horizontal in opening 026, and homalocephalus is the centre joint 104 under it, and homalocephalus is a trimming screw 151 on it; Said lower plate 152 is located at below the centre joint 104; Sit 132 bottom with respect to ripping bar 154 and strut before and after it, the centre of lower plate 152 is provided with boatswain chair 028, and the boatswain chair 028 of lower plate connects with the middle part of suspension 153.

The right part of Figure 40, Figure 41 and Figure 42 is that said being arranged on sat underframe to the car at seat 10 rear portions; It is a gravity folder underframe; It is made up of a long nut 161, two interior pushing blocks 162 and left and right outer baffle block 163,164, and said left and right outer baffle block 163,164 its inboards are respectively equipped with pin 030, and the head of pin is provided with screw thread 031; Said long nut 161 is with pin 030 butt joint of left and right outer baffle block; Said interior pushing block 162 is to be enclosed within on the pin 030, and its outside forms folder mouth 068 with outer baffle block, and its inboard is provided with inclined-plane 067; Saidly be provided with slope 107 to its both sides, seat 10 rear portions; The rear portion that the top on two slopes is provided with pin groove 105, two slopes is provided with chute 106, and said interior pushing block 162 its inboard inclined-planes 067 cooperate with slope 107; Left and right outer baffle block 163,164 its pins 030 are suspended from the pin groove 105; Said left and right outer baffle block 163,164 its trailing portions are not provided with and turn head and take bar 029, and it turns 029 respectively inwardly, hangs in the chute 106; Said outer baffle block connects 032 by the needs of folder mouth 068 respectively with the bottom of interior pushing block, and the screw thread at said long nut 161 its two ends is divided into left and right rotation direction.

Figure 43 and Figure 44 are that the said car that drives on the wheel carrier rear portion arcuate struts 191 that is arranged on is sat underframe, and it is a spring clip underframe, and it is by the synchronous holding screw of two bar bolt 177, two 176, two outer fixture blocks 171; Two internal clamping blocks 172, backing pin 174, spring 173, two struts 175 are formed; The outer fixture block 171 of said both sides is respectively equipped with bottom outlet 033, and the inboard of its underpart is respectively equipped with the screw 034 of left and right rotation direction, and this screw communicates with bottom outlet; The inboard on its top is provided with backing pin hole 035; The internal clamping block 172 of said backing pin 174 serial springs 173 and both sides, said two struts 175 are separately positioned between the inside and outside fixture block of two side clamp ports, 064 its underpart 066, and said two synchronous holding screw 176 its outer ends connect with the screw 034 of two outer fixture blocks; Its inner connects with thru-bolt 177; The combination of its single-piece of said spring clip is to be held together to close by the synchronous holding screw 176 and the outer fixture block 171 of two bar bolts 177 with two ends, and makes the bottom outlet 033 of fixture block outside the both sides fall to being sitting on the single head 036 of two arcuate struts 191, and said synchronous holding screw 176 is used for not that the outer of displacement moves; The single head 036 of locking arcuate struts 191; The same rotation direction of the internal and external screw thread of himself, same pitch, the screw thread at said pair of its two ends of bar bolt is divided into left and right rotation direction.

Like the right part of Figure 34 and Figure 35, and Figure 36 is extremely shown in Figure 39, and car is sat 12 and is provided with backrest 14; Said backrest is provided with the regulation device that goes up and down and lean on distance, and this device comprises: car is sat the carriage 122 of both sides, rear portion, two retaining teeth 146, spring 143, left and right retaining tooth bar 144, locking bar 145, and it vertically is provided with retaining rack bore 037 and latch arm hole 038 said carriage 122; Two holes 037,038 are large and small crossing coincidence hole, and it laterally is provided with retaining tooth hole 039, and this hole is with to overlap the hole longitudinally crossing; Be provided with transverse tube 124 between two lateral brackets, its pore communicates with the top in retaining tooth hole 039, and said spring 143 is arranged in the transverse tube 124; Said two retaining tooth 146 its bars 051 withstand on the spring both sides, and its tooth 146 and lower plane 059 thereof fall in the retaining tooth hole of two lateral brackets, and said left and right retaining tooth bar 144 its rear portions are connected firmly by cross bar 142; Its inboard retaining tooth 040 of arranging has chamfered groove 041, and its rear portion is provided with latch arm hole 042 longitudinally, and latch arm hole is with respect to the chamfered groove 041 of front portion; Said locking bar 145 is arranged in the latch arm hole, and its front portion is provided with a slotted hole pad 148, make locking bar rotating with the retaining tooth bar link; Locking bar a section in chamfered groove 041 is a flat bar 043, and the locking bar that said left and right retaining tooth bar and both sides accompany is arranged on carriage 122, and it overlaps in the hole 037,038 longitudinally, and its retaining tooth 040 is relative with retaining tooth 146; The flat bar section 043 of its locking bar is relative with the lower plane 059 of retaining tooth; Said left and right retaining tooth bar 144 its rear portions are provided with the vertical core 046 of backrest, and this vertical core is positioned at the outside of vertical latch arm hole 042, and partly intersect with vertical locking bar; The bottom of said backrest 14 its two montants 141 is provided with arc port 044; Said locking bar is provided with notch 045 on the position with respect to backrest montant 141, when backrest rose, its arc port 044 was relative with the notch 045 of locking bar; Can reverse locking bar 145 and stop backrest to fall, the leading portion flat bar 043 of its locking bar can be pushed the retaining tooth 146 that stretches into retaining tooth 040 open.The backrest in use variation of its position sees also Fig. 1 and Fig. 4.

In Fig. 1 and Fig. 4, the formation of car ladder comprises foot-driven lever, and is as shown in the figure; The car ladder is made up of with inboard foot-driven lever 26 terraced bar 20 and pull back spring 203; And the bottom of its wheel shaft 266 is provided with a fan-shaped fluted disc 265 behind foot-driven lever, and said terraced bar 20 and the pull back spring 203 retractable sidepieces that are connected in foot-driven lever 26, said foot-driven lever 26 its sidepieces are provided with decides angle apparatus 27 automatically; This device cooperates with terraced bar 20 and fan-shaped fluted disc 265, and said fan-shaped fluted disc 265 is moving part not.

To shown in Figure 47, foot-driven lever 26 is being provided with hole 062 and following hole 063 on its same side like Figure 45, its nearly wheel shaft 266 be last hole, said terraced bar 20 is provided with side shaft 060; Its spring is the torque spring 203 that is arranged on the side shaft, terraced bar one of which end 204 support ground, and the other end is provided with hanging head 201, and the side shaft 060 of terraced bar is arranged in the following hole 063 of foot-driven lever; The angle apparatus of deciding of said foot-driven lever 26 its sidepieces is a hook plate 271 and torque spring 272 thereof, and said hook plate is provided with side shaft 061, and its torque spring is arranged on the axle; Its hook 054 is following, and hook is provided with tooth 047, and the top 048 of hook plate is used for breaking off relations; Take off tooth, its side shaft 061 of hook plate connects with the last hole 062 of foot-driven lever, and said terraced bar spring 203 its torsion are greater than the spring 272 of hook plate; And rotation direction is opposite, and when terraced bar is stressed when putting down, its hook 054 of hook plate connects with the hanging head 201 of terraced bar; The tooth 047 of its hook top can be automatically and fan-shaped fluted disc 265 engagements, and when hook plate top 048 is stressed when hanging head 201 is broken off relations, terraced bar can self-return; Also promote simultaneously the hook plate return, and to pull with hook be retaining, said foot-driven lever 26 its back sides are provided with axle bumper plate 264 and its pressing plate 263 of two side shafts 060,061.Said terraced bar 20 its axle 060 sides are provided with the piece 202 that rubs; Said foot-driven lever 26 its back sides are provided with the arc sheet 049 that rubs with respect to the piece that rubs; And have regulation and control plate 050 at it, and this regulation and control plate is provided with regulation and control screw 261 and fixing screw 262, and it regulates and control screw sheet that can rub from the positive ejection of foot-driven lever; Said sheet 049 and the regulation and control plate 050 of rubbing can be one with pressing plate 263, said rub piece 202 when terraced bar return in arc sheet 049 outside friction process of rubbing.

Claims (4)

1. bicycle; Comprise vehicle frame (10,11); It is characterized in that: said vehicle frame is by forming seat (10) and main car frame (11), said the turnover connection of seat (10) (23,9) on the top of main car frame (11), saidly be provided with the beidirectional steering controlling device to seat (10) in it; This device is by the last jaw (604,606) of the disengaging type angle coupler at seat two ends and steel rope (603) thereof with turn to barre (6) to form; The said front portion that turns to barre (6) and upper and lower bearing (607) thereof to be arranged on a seat (10); The said driving link (606) of going up jaw is connected in the bottom that turns to barre; Driven member of last jaw (604) and bearing (605) are arranged on the rear portion of a seat (10); The driving link of last jaw and its top of the driven member of last jaw are provided with double flute godet (012); Being connected on two godets (012) of said steel rope (603) staggered form, the driven member (604,606) of the said driving link of going up jaw and last jaw but its pin-and-hole is uncovered (013) of clutch.

2. bicycle according to claim 1; It is characterized in that: said the turnover top that is connected in main car frame (11) of seat (10); Be the middle part of seat to be set a sagging screw rod (101); In the middle part of main car frame (11), in it circular nut (231) is set, its both sides are provided with block card (117), are the circular nut axial location when block card relies on main car frame (11); Said sagging screw rod (101) connects with circular nut (231), has raised making it upset behind the seat (10) through reversing circular nut (231).

3. bicycle according to claim 2; It is characterized in that: it has ratchet (004,005) said circular nut (231); And outside it, be provided with spanner (232); The collar of this spanner (008) hangs over outside the ratchet, is provided with ratchet (235), steamboat (236), steamboat bar (234), spring (233) in the spanner; Said ratchet is to be teeth groove (004) with a plurality of holes; Between two holes to be a kind of special ratchet of tooth (005), said ratchet (235) is cylindric, and its ratchet head is provided with the curve slope (006) that extends to shoulder; End is provided with notch (007) in addition; Said steamboat (236) exposes at the rear portion of spanner (232), and said steamboat bar (234) one of which end connects steamboat, and the other end passes in the notch (007) that spring (233) is inserted in ratchet.

4. bicycle according to claim 1 is characterized in that: said the turnover top that is connected in main car frame (11) of seat (10), and be also to be respectively equipped with pitman (102) to the front and back of seat (10); Every end pitman divides left and right; Left and right pitman is provided with the wedge mouth (009) that uses lower inclined plane, and what the pitman at two ends (102) can replace connects with main car frame (11), and its front and back of said main car frame (11) are respectively equipped with horizontal slotted eye (111); The coincidence hole of this slotted eye side of being, circle; Both sides of square hole (055) are provided with the vertical core (112) of left and right pitman (102) before and after it, and a double end screw rod (901) is set respectively in the said front and back slotted eyes (111), and are respectively equipped with the circular nut (902,903) of band wedge head (010) in the both sides of each two-thread screw; Its two wedges head (010) is with respect to the inboard of its wedge mouth (009) of left and right pitman; Screw (904) during the centre of said two wedge heads (010) is provided with surely, this screw attachment are on the top of square hole (055), and described two-thread screw (901) is provided with pulls mouthful (011); The screw thread of its double end is divided into left and right rotation direction, and matches with the circular nut (902,903) of both sides band wedge head.

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