CN105059447B - A kind of folding bicycle of front and back wheel fit type - Google Patents

Abstract

The invention discloses a kind of folding bicycle of front and back wheel fit type, including kinematic link and front-wheel, front-wheel is rotationally connected with one end of kinematic link by axle assembly, kinematic link parallel to front-wheel rotational plane and not in the rotational plane of front-wheel.In front component, kinematic link parallel to front-wheel rotational plane and not in the rotational plane of front-wheel, i.e., kinematic link be located at front-wheel side, by rotating kinematic link front-wheel can be made to overturn to the opposite side of kinematic link.The folding volume of bicycle can be effectively reduced, front-wheel is stacked with trailing wheel and is in parallel plane, influence of the front-wheel when folding to trailing wheel is reduced to greatest extent, makes folding more reasonable.

Description

A kind of folding bicycle of front and back wheel fit type

Technical field

The present invention relates to folding bicycle, it is a kind of folding bicycle of front and back wheel fit type.

Technical background

Bicycle, also known as bicycle or bicycle, the small-sized ground vehicles of typically two wheels.People is ridden after car, is trampled with pin Plate is power, is the vehicles of environmental protection.English bicycle.Wherein bi means two, and cycle means wheel, i.e. two-wheeled Car.In inland of China, TaiWan, China, Singapore, it is commonly referred to as " bicycle " or " bicycle ".Bicycle species is a lot, has Single bicycle, tandem bicycle also has many person bicycles.

Bicycle is used for riding instead of walk, gone on a journey as the vehicles of environmental protection；Increasing people regard bicycle as fitness equipment Timber-used is gone on a tour come exercise of riding, bicycle；Bicycle is also a sports campaign in itself, there is road race, mountain region Cycle racing, Track cycling, stunt bicycle race etc..

Folding bicycle belongs to a classification of bicycle.General folded bicycle has vehicle frame folding joint and standpipe folding joint Constitute.By vehicle frame folding, by front and rear two-wheeled doubling together, it can reduce by 45% or so length.Vehicle can be put after folding Enter in boarding case and folding bag, and automobile boot., can be manual also without by external tools during folding By car folding and expanding.After folding by seat bar as the strong point so that fold after can stand surely.Folding bicycle is carried, user Just it is comfortable, mature production technology.

But the folding process of this folding bicycle is relatively complicated, it is necessary to remove what certain amount control bicycle was folded Latch, and some screws for tightening, spend and cost user and folded the substantial amounts of time.

The vehicle body after finishing is folded simultaneously still occupies larger space, and its profile folded after finishing is more strange, It is difficult to the aesthetic conceptions for meeting modern.

Therefore, still there is following defect in existing folding bicycle：

First, existing bicycle folding mechanism is complicated, cumbersome, the deployment lifting process consumption plenty of time；

2nd, the vehicle frame of existing bicycle is wholely set, when a part for vehicle frame is damaged, it is necessary to enter to whole vehicle frame Row is changed and repaired, and replacement cost is larger, and because overall vehicle frame is bulky, maintenance difficulty is big；

3rd, the vehicle frame each several part parts unloading process after damaging is cumbersome, it is necessary to which further simplify dismounting；

4th, the volume after folding is still more huge, is not easy to user and carries and store.

For folding volume it is more huge the problem of：Optimal folding mode be front-wheel, trailing wheel be in it is parallel flat Face is simultaneously stacked, and two wheels are stacked and concentric, the space of folding bicycle can be greatly compressed, compared with small occupied space.But by When existing bicycle is being ridden, it is necessary to keep front-wheel to be in trailing wheel in same plane, and existing folding mode is to pass through The folding of cycle frame, makes front and back wheel closer to reducing space with this, after front and back wheel is contradicted, vehicle frame is difficult to further folding It is folded.

The content of the invention

The present invention goal of the invention be in order to solve bicycle folding when front-wheel folding volume is influenceed the problem of there is provided A kind of folding bicycle of front and back wheel fit type, can be by the side of front-wheel folding to trailing wheel, and front and back wheel is in parallel put down Face, reduces the folding volume of bicycle, makes folding more reasonable to greatest extent.

In order to realize foregoing invention purpose, present invention employs following technical scheme：A kind of folding of front and back wheel fit type Bicycle, including：

A, headstock component；Including：Handrail, hollow head rod and drive link, handrail are fixed on drive link one end, and drive link is worn Inside hollow head rod, drive link can 360 degree of rotations；

B, front component；Including：Kinematic link and front-wheel, front-drive are connected to one end of kinematic link, kinematic link Be connected with drive link, kinematic link parallel to front-wheel rotational plane and not in the rotational plane of front-wheel；

C, saddle component, including：Seat bar and cushion, cushion are fixed on a bar upper end；

D, wheel assembly, including trailing wheel, rear wheel frame and power output system, power output system are arranged in rear wheel frame Portion, rear wheel is connected to the rear end of rear wheel frame；

E, folding centre frame, the centre frame respectively with headstock component, front component, saddle component, wheel assembly It is connected；

When cycling straight-going state, the front-wheel and trailing wheel are in the same plane, handrail rotating 180 deg, the front-wheel On the parallel surface of trailing wheel；

Further, the centre frame is in X-shaped, and centre frame includes：First and second；In first and second The rotatable installation in portion；

First two ends connect headstock component and wheel assembly respectively, and second two ends connect front wheels respectively Part and saddle component；

Described second kinematic link included in the second housing, at least two groups detent mechanisms and front component, which coordinates, to be connected The second driving shaft and center driving component connect；

Second driving shaft and detent mechanism are located in second shell body, and center driving component is installed through first and second The center in portion, second driving shaft the inner drive connection center driving component, outer end extends second installing port；

The detent mechanism includes fixed positioning matrix, positioning gland, retaining spring and locating dowel on the second housing； Ladder hole is provided with the positioning matrix, ladder hole is by the first hole close to first and the second hole group away from first Into；The locating dowel upper end is provided with positioning head, and positioning head is located in the second hole, is located in the middle part of locating dowel in the first hole；Positioning pressure Lid is fixed on positioning matrix outer end；Retaining spring is compressed between positioning gland and positioning head, and is contained in the second hole；

Described first includes the first housing, annular and presses button and spring, and the first housing is away from the side of second provided with appearance What annular of receiving pressed button presses button groove, and annular, which is pressed, to be provided with the inside of button through the top pressure post for pressing button groove bottom land, and the spring, which is located at, presses button groove It is interior and be enclosed on top pressure post；

First housing is provided with positioning through hole close to the side of second；The quantity of positioning through hole and top pressure post is respectively with determining Position post matching, top pressure post is inner to correspond to the positioning through hole respectively；

First with second be in X-shaped when, the positioning through hole is corresponding with the locating dowel respectively；Locating dowel lower end is stretched out In the positioning through hole of second to first.

Further, the center driving component includes center driving axle, headstock bevel gear, front-wheel bevel gear, and first passes Moving gear and the second travelling gear, the center driving axle run through and fix the first travelling gear and the second travelling gear, first Travelling gear and the second travelling gear synchronous axial system, the first travelling gear are connected with headstock bevel gear, the second travelling gear with Front-wheel bevel gear is connected；Center driving axle two ends are arranged with centre bearing, and 2 centre bearings are individually fixed in first In portion and second.

Further, the second housing close to first is provided with arc-shaped through-hole and fixed arc limit on the second housing Position block, arc-shaped through-hole and the arc-shaped limit block is centered around center driving component outer circumferential side and on same circumference；

X-shaped centre frame also includes position-limit mechanism, and position-limit mechanism includes being fixed on the first housing and stretches into the convex of arc-shaped through-hole Block and the contiguous block being connected in second shell body and with projection；Projection rotates against with first and second and follows arc Through hole activity；The size of the contiguous block is more than the width of arc-shaped through-hole.

Further, the arc spring hole along its arc length direction is provided with arc-shaped limit block, arc spring is arranged on In arc spring hole, and the arc spring hole, the side of contiguous block and the arc for stretching out the arc-shaped limit block are stretched out in two ends Shape spring one end correspondence.

Further, the front component also includes the first axle assembly, hollow front-wheel loop bar, during kinematic link is arranged in In unprecedented wheel loop bar；First axle assembly includes bolt, bearing and nut, and front-wheel center is fixed on bearing, the spiral shell Lower end attaching nut of the bolt through bearing and kinematic link.

Further, the power output system is by flywheel, chain wheel, pedal, chain and the rotating turret group for chain wheel fixation Into；

The rotating turret is rotationally connected with the middle part of rear wheel frame；

Rotating turret surface is provided with the installing port fixed for pedal, and pedal rotates to be connected or rotate by crank with installing port to be connected Connect.

Further, it is respectively equipped with corresponding annular in the outside wall surface of first inner side and the outside wall surface of second inner side Ball between ball grooves, two annular ball grooves provided with multiple arrangements in a ring.

Compared with prior art, the folding bicycle of the front and back wheel fit type of above-mentioned technical proposal is employed, with as follows Beneficial effect：

Using the folding bicycle of the front and back wheel fit type of the present invention, the folding volume of bicycle can be effectively reduced, before making Wheel is stacked with trailing wheel and is in parallel plane, and influence of the front-wheel when folding to trailing wheel is reduced to greatest extent, makes folding more Rationally.

Wherein, folding centre frame is mainly used in shortening the distance between front wheels and rear wheels, front and back wheel when enabling folding It is enough to press close to each other；

Kinematic link in front component is connected with headstock component, and front-drive can be driven by headstock component, preceding Wheel can 360 degree freely rotate, rotational angle is changeable；

In front component, kinematic link parallel to front-wheel rotational plane and not in the rotational plane of front-wheel, that is, pass Dynamic connecting rod is located at the side of front-wheel；After centre frame is folded and is shunk, front-wheel drives transmission to connect close to trailing wheel by rotating handrail Bar is rotated, and is made front-drive and is folded to side, front and back wheel is in parallel plane, reduces folding to greatest extent with this voluntarily Car folds space-consuming.

Brief description of the drawings

Fig. 1 is the structural representation of the deployed condition of folding bicycle embodiment 1 of the present invention；

Fig. 2 is the structural representation of the folded state of the embodiment of the present invention 1；

Fig. 3 is the exploded perspective view of the embodiment of the present invention 1；

Fig. 4 is the structural representation of X-shaped centre frame in the embodiment of the present invention；

Fig. 5 is the structural representation of X-shaped centre frame in the embodiment of the present invention；

Fig. 6 is the structural representation of first in the embodiment of the present invention；

Fig. 7 is the structural representation of X-shaped centre frame in the embodiment of the present invention；

Fig. 8 is the structural representation of contiguous block and the second ball grooves in the embodiment of the present invention；

Fig. 9 is the structural representation of contiguous block and the second ball grooves in the embodiment of the present invention；

Figure 10 is the sectional view of detent mechanism in the embodiment of the present invention；

Figure 11 is the structural representation of front component in the embodiment of the present invention；

Figure 12 is the structural representation of headstock component in the embodiment of the present invention；

Figure 13 is the structural representation of steering in the embodiment of the present invention；

Figure 14 is the structural representation straight trip of steering in the embodiment of the present invention；

Figure 15 is that the structural representation of steering in the embodiment of the present invention turns left；

Figure 16 is that the structural representation of steering in the embodiment of the present invention is turned right；

Figure 17 be the embodiment of the present invention in wheel assembly explosive view；

Figure 18 be the embodiment of the present invention in wheel assembly structural representation.

Reference：1st, front component；10th, kinematic link；101st, the first square groove；11st, hollow front-wheel loop bar；110th, Two connecting portions；12nd, the first axle assembly；122nd, retainer；123rd, bearing；13rd, front-wheel；

2nd, saddle component；20th, cushion；21st, seat bar；210th, the 3rd connecting portion；

3rd, headstock component；30th, drive link；31st, hollow head rod；310th, first connecting portion；33rd, annular handrail；331st, it is preceding Hold handle；3311st, lock core；3312nd, dead bolt；332nd, side handle；333rd, flat segments；34th, threeway bearing；341st, branch platform；35、 Locking bushing；

4th, wheel assembly；40th, rear wheel frame；400th, the 4th connecting portion；41st, transmission system is ridden；410th, rotating turret；411st, tooth Disk；412nd, flywheel；413rd, chain；4132nd, installing port；414th, pedal；42nd, the second axle assembly；43rd, trailing wheel；

5th, first；50th, annular presses button；501st, top pressure post；5010th, pressure end；502nd, back-moving spring；51st, the first housing； 510th, the first installing port；511st, the 4th installing port；513rd, button groove is pressed；52nd, positioning through hole；53rd, the first power transmission shaft；530th, headstock is bored Gear；55th, projection；56th, ball；57th, annular ball grooves；

6th, second；61st, the second housing；610th, the 3rd installing port；611st, the second installing port；614th, arc-shaped through-hole；6410、 Connecting bridge；615th, ball grooves；62nd, detent mechanism；620th, gland,；621st, retaining spring；622nd, matrix is positioned；6220th, second Hole；6221st, the first hole；623rd, locating dowel；63rd, center driving component；631st, center driving axle；632nd, the second travelling gear； 633rd, the first travelling gear；64th, arc-shaped limit block；65th, second driving shaft；650th, front-wheel bevel gear；66th, contiguous block；660th, Two ball grooves.

Embodiment

The present invention is described further below in conjunction with the accompanying drawings.

A kind of folding bicycle as shown in Fig. 1 to 18, including：Headstock component 3, saddle component 2, front component 1, trailing wheel Component 4 and the annexable X-shaped centre frame positioned at middle part.

First, headstock component 3：

Headstock component 3, including hollow head rod 31, drive link 30, threeway bearing 34 and for holding or elbow is rested against Annular handrail 33.Wherein：The upper end of drive link 30 is fixed on threeway bearing 34, and the lower end of drive link 30 extends hollow head rod 31 It is interior；The hollow lower end of head rod 31 is provided with first connecting portion 310, and upper end is movably arranged on the drive link 30 close to threeway bearing 34 On.

Specifically the upper end of hollow head rod 31 is that the drive link 30 close to threeway bearing 34 is movably arranged on by bearing On, hollow head rod 31 is fixed on bearing outer ring, therefore when rotating drive link 30, will not twist empty wagons head rod.

Above-mentioned annular handrail 33 is in the round rectangle of closing, and the annular sidepiece of handrail 33 1 is flat segments 333, the flat segments 333 are fixed on the threeway bearing 34, and vertical with hollow head rod 31.

Headstock component 3 is used to control ride direction of the user when riding, for control left-hand rotation when bicycle advances, Straight trip and right-hand rotation.

Drive link 30 is connected with handrail, and user is transferred to front-wheel by rotating by rotary handle by drive link 30 13.Which kind of specifically seen below with structure driven.

Above-mentioned drive link 30 is interspersed in hollow head rod 31, the of first 5 in hollow head rod 31 and X-shaped centre frame One installing port 510 is mutually fixed, and hollow head rod 31 can provide very big protection for drive link 30, prevent drive link 30 by external force Generation mechanical damage, simultaneously because hollow head rod 31 is coated on the periphery of drive link 30, is prevented effectively from drive link 30 by rain Water erosion, the irradiation of light and the entrance of dust, can extend the service life of drive link 30.

Above-mentioned annular handrail 33 is specifically made up of straight front end handle 331, two groups of side handles 332 and flat segments 333, by Duplex or double ramus volaris profundus are against to the flat segments of handrail when annular handrail 33 is available for bicyclist in fatigue in the round rectangle of closing 333 and the top of front end handle 331.In addition, due also to the closing of annular handrail 33 is set, thus the elbow of bicyclist rests against annular and helps Front end handle 331 can be held during hand 33, certain control is carried out to the direction of headstock, again can be to driving when fatigue is ridden in alleviation Direction carries out control, improves security.

Side handle 332, front end handle 331 and the flat segments 333 of annular handrail 33 are used equally for user to grasp, and form is more Sample, the user of different heights and use habit can accordingly be adjusted according to own situation, the grasping for selecting oneself to like Mode.

Above-mentioned front end handle 331, side handle 332 and by section be circular stainless steel for fixed flat segments 333 Pipe is made, and stainless steel tube is rounded, and its structural strength is improved first, and secondly without corner angle, bicyclist is not in when in use Sense of discomfort.

Sponge, rubber and other items can be also arranged outside handrail, comfort level is improved, the present embodiment is not specifically limited.

Branch platform 341 is additionally provided with threeway bearing 34, branch platform 341 is rested against mainly for jockey's palm or duplex, branch platform Face is parallel with the plane of handrail for resting against on 341, is overlapped with the plane of the annular extreme higher position of handrail 33, when palm or elbow are rested against When, branch platform 341 can avoid hanging phenomenon, improve comfort level.

Secondly, the gap left between branch platform 341 and front end handle 331 is less than the diameter of the common mineral water bottles of 10mm about Water bottle, can be directly placed among gap by 7-9mm, be easy to the carrying of the column article such as water bottle, umbrella.

Finally, in order to allow inside of the lower end of drive link 30 smoothly with annexable X-shaped centre frame to be connected, so that by power again Transfer out to front-wheel 13, therefore the lower end of drive link 30 of the present invention is with being provided with the first square groove 101.

2nd, front component 1：

Front component 1, including：Hollow front-wheel loop bar 11, kinematic link 10, the first axle assembly 12 and front-wheel 13.

Front component 1 is used to coordinate headstock component 3, and the annular handrail 33 of headstock component 3, which is rotated, follows kinematic link 10 It is together rotated, and front component 1 together deflects in the presence of kinematic link 10, realizes the adjustment in direction when riding.

Kinematic link 10 is located at the hollow inner side of front-wheel loop bar 11, and the hollow upper end of front-wheel loop bar 11 is provided with second connecting portion 110, The hollow lower end of front-wheel loop bar 11 is rotatably connected on kinematic link 10.Front-wheel 13 is located at the side of kinematic link 10, kinematic link Hollow front-wheel loop bar 11 is stretched into 10 upper ends, and the lower end of kinematic link 10 connects front-wheel 13, the first wheel shaft by the first axle assembly 12 Component 12 is both used to roll to install, and realizes that front-wheel 13 is located at the rotation connection of the lower end of kinematic link 10 again.

In order to allow inside of the kinematic link 10 smoothly with annexable X-shaped centre frame to be connected, so that drive link 30 be operated Steering drive to front-wheel 13, the upper end of kinematic link 10 of the invention is provided with the second square connecting portion.

Provided with holding kinematic link 10 in the retainer 122 of position in hollow front-wheel loop bar 11 in hollow front-wheel loop bar 11, Bearing is provided between retainer 122 and hollow front-wheel loop bar 11, bearing is arranged and is fixed on the outer surface of kinematic link 10.

On front-wheel 13：Front-wheel 13 in the present embodiment is solid wheel, and wheel hub is the solid wheel hub of no spoke；

The first axle assembly 12 in front component 1 includes bolt, bearing and nut, and the center of front-wheel 13 is fixed on bearing On, lower end attaching nut of the bolt through bearing and kinematic link 10.

Nut is used to limit front-wheel 13, front-wheel 13 is contradicted nut, and keep front-wheel 13 to be erected when advancing with bolt Directly.Bolt is used to front-wheel 13 being rotationally connected with kinematic link 10, and the friction between bearing reduction front-wheel 13 and bolt makes folding It is farther that folded bicycle can advance.

In front component 1, front-wheel 13 is located at kinematic link 10 close to the side of first 5, when cycling straight trip, front-wheel 13 are located on same rotational plane with trailing wheel 43, and when X-shaped centre frame is folded, the annular rotating 180 deg of handrail 33, before making Wheel 13 is located on the parallel surface of trailing wheel 43, and the trailing wheel 43 of front-wheel 13 can be at parallel state, as shown in Figure 2, can effectively reduce The spatial volume that bicycle lock takes after folding.

3rd, saddle component 2：

Saddle component 2, including：Seat bar 21 and cushion 20, the lower end of seat bar 21 are provided with the 3rd connecting portion 210, cushion 20 Pass through the present upper end of bar 21 of fastener connection.

The middle part of seat bar 21 is hollow to be set, effectively the weight of reduction saddle component 2, when reduction folding bicycle is ridden and carried Weight, the pressure that reduction seat bar 21 is born improves structural strength.

Seat bar 21 top is connected with the clip for being connected with and being fixed for cushion 20 in solid fixed seat, fixed seat.It is fixed Seat is solid to be set, and can be effectively increased the structural strength of fixed seat, clip can highly be tightened in the presence of screw increases it with consolidating The fixation of reservation, makes the connection of fixed seat more solid and reliable.

Cushion 20 has support rod member, and support rod member is rotated with clip by Quick release and is connected, and support rod member is located at Quick Release In the middle part of bar.Support rod member under cushion 20 makes cushion 20 hanging and certain support is carried out to it, when cushion 20 is pressurized, and sits Small size deformation can occur for pad 20, more comfortable when using.

The effect of Quick release is first：Realize that support rod member, in the rotation connection on clip, is packed up when folding bicycle is folded When, can be cocked next upwards by cushion 20, make the volume of folding bicycle smaller, it is easier to carry.And when folding is voluntarily ridden, Cushion 20 can be pulled down, be sat for normal user.

When the handle of Quick release is in 90 ° or so with the bar cramp angle in the middle part of it, i.e., handle is pushed, and Quick release two ends spacing becomes It is small, support rod member two ends are extruded, are that support rod member is brought into close contact with clip, frictional resistance is big, and cushion 20 can not rotate. When Quick release is opened, spacing increase in Quick release two ends reduces to the two ends clamping force for supporting rod member, allows 20 turns of cushion It is dynamic.

4th, wheel assembly 4：

Wheel assembly 4, including trailing wheel 43, the second axle assembly 42, rear wheel frame 40 and power output system, trailing wheel 43 pass through Second axle assembly 42 is connected to the lower end of rear wheel frame 40, and power output system is arranged on the middle part of rear wheel frame 40, power output system Output end drive connection trailing wheel 43, the upper end of rear wheel frame 40 is provided with the 4th connecting portion 400；

The 4th connecting portion 400 on rear wheel frame 40 is mutually fixed with the 4th installing port 511 of first 5, makes trailing wheel 43 and X-shaped Centre frame is connected.

The function of wheel assembly 4 is to provide the power advanced for bicycle, and power output system can be that battery coordinates Motor, the driving source of bicycle is used as using in the form of electric power power-assisted；Bicycle form that can also be common, passes through user Foot pedals 414 realize power output, and the driving source of bicycle is used as using manpower.

Power output system in the present embodiment be manpower as power output, it is by flywheel 412, chain wheel 411, pedal 414th, chain 413 and the rotating turret 410 fixed for chain wheel 411 are constituted；The surface of rotating turret 410 is provided with the peace fixed for pedal 414 Mouth 4132 is filled, pedal 414 is rotated to be connected or rotate by crank with installing port 4132 and connected.

In user's pushes pedals 414, rotating turret 410 can be made to follow pedal 414 to rotate, the tooth on rotating turret 410 Disk 411 is synchronous to be rotated, and chain wheel 411 is together rotated by the flywheel driven 412 of chain 413, and flywheel 412 finally drives trailing wheel 43 Rotate, realize the power output that bicycle advances.

Secondly, power output system is arranged at the inside of rear wheel frame 40, makes chain wheel 411, flywheel 412 and chain 413 or skin Band is in the protection of rear wheel frame 40, rear wheel frame 40 is had comprehensive protection to power output system, reduces sleet sky The influence of gas and sunshine to power output system；Secondly, rear wheel frame 40 can prevent foreign object to the mechanical of power output system The service life of destruction, greatly extension power output system.

Rear wheel frame 40, which is provided with, to be embedded for rotating turret 410 and rotates the manhole or caulking groove of connection, and rotating turret 410 is in middle part Hollow out cylinder.Rotating turret 410 is embedded at the inside of rear wheel frame 40 and rotated with rear wheel frame 40 and is connected, and rear wheel frame 40 is to rotating turret 410 support contact area is larger, and compared to traditional chain wheel 411 by way of middle part axostylus axostyle is connected with vehicle frame, its advantage exists In：The contact area of rear wheel frame 40 and rotating turret 410 is larger, and rotating turret 410 is embedded inside rear wheel frame 40, rotating turret 410 During rotation, rear wheel frame 40 has spacing and supporting role to the periphery of rotating turret 410, and center is passed through compared to original chain wheel 411 The mode that rotating shaft position is connected with vehicle frame, the present embodiment greatly increases the connective stability of rotating turret 410, prevents rotating turret 410 abjection phenomenons, improve service life.

Rotating turret 410 is hollow to be set, the cylinder hollowed out in middle part.After rotating turret 410 is hollow, under its overall weight Drop 70% or so, can effectively reduce user and pedal and trample required power, and reduction is ridden difficulty.

Installing port 4132 can be located at the side wall of rotating turret 410, may also set up in the inwall of rotating turret 410, as long as can make to step on Plate 414 is fixed on the optional position of rotating turret 410 and makes pedal 414 drive rotating turret 410 to rotate.And in the present embodiment Rotating turret 410 is due to small volume, and the side for being installed on rotating turret 410 easily causes the structural strength deficiency of rotating turret 410, therefore The inwall of rotating turret 410 is positioned in, to provide the installing space that pedal 414 is enough.

Installing port 4132 is used for the installation of pedal 414, and pedal 414 can be directly mounted at installing port 4132, can also use Crank is indirectly connected with to pedal 414 and installing port 4132.Pedal 414, which is mounted directly, to be advantageous in that：Pedal 414 takes Space it is smaller, especially when folded state, pedal 414 is directly mounted on the installing port 4132 of rotating turret 410, can be with Wheel assembly 4 is set to seem more small and exquisite；Pedal 414 is indirectly connected with being advantageous in that by crank with installing port 4132：It is bent Handle can increase torque arm length, and required power is smaller when user tramples, more laborsaving when riding.Pedal 414 in the present embodiment It is directly mounted at the installing port 4132 of rotating turret 410, the volume of wheel assembly 4 is reduced to greatest extent.Installing port 4132 in turn The radius of gyration in moving frame 410 is 0.9 times or so of the radius of chain wheel 411.

5th, annexable X-shaped centre frame：

X-shaped centre frame, includes：

First 5 and second 6；The first 5 and second 6 rotatable installation in middle part；

First 5 two ends is respectively equipped with first with the detachable installation of 310 and the 4th connecting portion of first connecting portion 400 The installing port 511 of installing port 510 and the 4th；

Second 6 provided with the second installing port with the detachable installation of 110 and the 3rd connecting portion of second connecting portion 210 611 and the 3rd installing port 610；

X-shaped centre frame and the detachable installation of headstock component 3, saddle component 2, front component 1, wheel assembly 4, work as car When random component is damaged in head assembly 3, saddle component 2, front component 1 and wheel assembly 4, it can be changed by detachable Component reaches the purpose of rapid-maintenance, and the component damaged can then return factory and be repaired.The worry of vehicle depot repair is avoided, Greatly accelerate repair progress.

Secondly, the component of the folding bicycle in the present embodiment has different decorative pattern and color, and user can be by difference The folding bicycle part of color pattern carries out free matched combined, meets personal aesthetic requirement.

Include the second housing 61, four groups of detent mechanisms 62 for second 6, coordinate with the kinematic link 10 in front component 1 and connect The second driving shaft 65 and center driving component 63 connect.Second driving shaft 65 and detent mechanism 62 are located in the second housing 61, Center driving component 63 is installed through the center of first 5 and second 6, the inner drive connection center of second driving shaft 65 Transmission component 63, outer end extends the second installing port 611.

Second driving shaft 65 is provided with the second square connecting portion, the second square connecting portion and the towards one end of kinematic link 10 Two square grooves are engaged；The upper end of kinematic link 10 is provided with the second square groove；The projection 55 that second square groove is square, for Two square connecting portions are engaged, and kinematic link 10 and second driving shaft 65 is driven other in which axle together in rotation Rotate.In the present embodiment, the second square connecting portion and the second square groove, because its processing is more simple, can be reduced many Process time and difficulty of processing, therefore the present embodiment is using square, according to polygon grooves such as hexagon, pentagon, triangles and The cooperation of block also can reach identical effect.

Detent mechanism includes positioning matrix 622, positioning gland 620, the and of retaining spring 621 being fixed on the second housing 61 Locating dowel 623；Position and ladder hole is provided with matrix 622, ladder hole is by close to first hole 62211 of first 5 and remote Second hole 6220 of first 5 is constituted；The upper end of locating dowel 623 is provided with positioning head, and positioning head is located in the second hole 6220, positioning The middle part of post 623 is located in the first hole 62211；Positioning gland 620 is fixed on positioning matrix 622 outer end；Retaining spring 621 is compressed Between positioning gland 620 and positioning head, and it is contained in the second hole 6220.

Detent mechanism is used for the shape for limiting X-shaped centre frame, fixed when X-shaped centre frame is in folding or open mode Position mechanism can limit the relative movement of first 5 and second 6, enable X-shaped centre frame when bicycle is used or folded and packs up A fixed shape is enough kept, portability when keeping the security of driving and folding carrying.

As shown in Figure 4, in detent mechanism positioning matrix 622 and second 6 are integrally formed setting, position matrix 622 Middle part have a shoulder hole, shoulder hole includes the first hole 6221 and the second hole 6220, and the first hole 6221 is logical close to first 5 Locating dowel 623, locating dowel 623 are placed with hole, and the aperture of the aperture less than the second hole 6220 in the first hole 6221, shoulder hole Front end be located in the first hole 6221, the rear end of locating dowel 623 is more than the disk and thin plate in the first hole 6221, locating dowel for diameter Retaining spring 621 is provided with after 623, retaining spring 621 contradicts positioning gland 620, is that locating dowel 623 provides a downward power, Locating dowel 623 is set to be in normal ejection state, pressing pressure locating dowel 623 can make it shrink back upwards into the first hole 6221.

In the case where the expansion of normal operating condition bicycle is in X-shaped and folded state, work of the locating dowel 623 by retaining spring 621 With in the state of stretching, and locating dowel 623 enters in first 5 positioning through hole 52 corresponding with normal operating condition, makes the One 5 and second 6 can not occur relative rotation, fix the two.

Include the first housing 51, annular for first 5 and press button 50 and spring, the first housing 51 is set away from the side of second 6 There is accommodate that annular presses button 50 to press button groove 513, annular is pressed the inner side of button 50 and is provided with through the top pressure post 501 for pressing the bottom land of button groove 513, bullet Spring, which is located at, to be pressed in button groove 513 and is enclosed on top pressure post 501.

The position of top pressure post 501 and quantity are corresponding with positioning through hole 52, annular press torsion in do not press pressure condition when, it is fixed Position post 623 makes first 5 and second 6 can not occur relative rotation through positioning matrix 622 and positioning through hole 52, when pressing Pressure ring shape presses torsion, and top pressure post 501 is moved outwardly and into positioning through hole 52, and locating dowel 623 is extruded into positioning through hole 52 is allowed to In the first hole of retraction 6221, the rotation for making locating dowel 623 no longer limit first 5 and second 6, first 5 and second 6 can Rotate again.

As shown in Figure 6：Pressure end 5010 is slightly less than the diameter of positioning through hole 52, positioning through hole 52 and top pressure in cylinder Gap between first 5010 is less than 0.1mm；Positioning through hole 52 is provided with towards the side of top pressure post 501 to be used to increase guide effect Extend hole wall.

The diameter of pressure end 5010 is less than positioning through hole 52, and pressure end 5010 can be pushed up in the presence of annular presses button 50 Enter in positioning through hole 52, locating dowel 623 is ejected, the positioning action of detent mechanism is failed, first 5 and second 6 can send out Raw relative rotation.Extension hole wall is used to increase the length of positioning through hole 52, makes its guide effect to locating dowel 623 more bright It is aobvious.

The length of pressure end 5010 is identical with the depth of positioning through hole 52.Pressing button 50 in annular and press pressure enters pressure end 5010 When in positioning through hole 52, pressure end 5010 need to be by the ejection positioning through hole 52, and pressure end 5010 must also completely of locating dowel 623 In positioning through hole 52, i.e., the contact surface of pressure end 5010 and locating dowel 623 is put down in the rotation of first 5 and second 6 In face.

In actual production process, for the inspection between pressure end 5010 and positioning through hole 52：Pressure end 5010 is put Enter positioning through hole 52, the position of pressure end 5010 from opposite side, you can judge pressure end 5010 length whether with positioning The length of through hole 52 is identical, if meet demand.The overhang of top pressure post 501 is limited with this, prevents top pressure post 501 from stretching out Degree enters in the first hole 6221, causes first 5 and second 6 to be difficult to rotate.

Meanwhile, on the amount of stretching into of top pressure post 501, also it can set spacing in the afterbody of top pressure post 501 (annular presses the end of button 50) Structure, prevents top pressure post 501 from excessively stretching into, but compared to the limit method of above-mentioned pressure end 5010, above-mentioned limit method It is more easily measured and judges.

The top of pressure end 5010 and locating dowel 623 is in dome, due to the contact of both pressure end 5010 and locating dowel 623 Face is located on the interface of first 5 and second 6, according to the pressure end 5010 and locating dowel 623 without bevel edge, then Be easy to can be in the first hole 6221 or positioning through hole 52 for pressure end 5010 or locating dowel 623 during rotation.Therefore, lead to Cross and set up dome, make the two that there is certain transition cambered surface on interface.Similar effect is also can reach according to chamfering, but It is better using dome.

Torsion is pressed by pressing pressure ring shape, releases folding bicycle spacing, allows bicycle from the use state of X-shaped to folding Overlapping state changes, in rotation process, unclamps annular and presses torsion, when locating dowel 623 is directed at positioning through hole 52 again, locating dowel 623 again send into locating dowel 623 in positioning through hole 52 in the presence of retaining spring 621, folding bicycle is in folding State, and first 5 and second 6 it is spacing again can not rotate, keep bicycle be in folded state.Work as folding The use state of X-shaped of the bicycle from folded state to expansion, is also ibid identical flow.

Spring one end on top pressure post 501 contradicts to press the one end of button groove 513 and contradict annular and press button 50 presses button 50 1 there is provided annular The power of individual resilience, makes the annular in detent mechanism press the normal time of button 50 in ejection state.

Also include the first power transmission shaft 53 for first 5, the first power transmission shaft 53 is square provided with first towards one end of drive link 30 Connecting portion, the first square connecting portion is engaged with the first square groove 101；With the cooperation of the second square connecting portion and the second square groove Form is identical, and the shape of square connecting portion is square column, in insertion square groove, makes the docking of two axles and synchronous axial system.

Close to second housing 61 of first 5 provided with arc-shaped through-hole 614 and the arc being fixed on the second housing 61 limit Position block 64, arc-shaped through-hole 614 and arc-shaped limit block 64 are centered around the outer circumferential side of center driving component 63 and on same circumference, arc The arc-shaped through-hole 614 along its arc length direction is provided with shape limited block 64, arc spring is arranged in arc-shaped through-hole 614, and And arc-shaped through-hole 614 is stretched out at two ends.

As shown in Figure 4 and Figure 5, X-shaped centre frame also includes position-limit mechanism, and position-limit mechanism includes being fixed on the first housing 51 simultaneously The contiguous block 66 for stretching into the projection 55 of arc-shaped through-hole 614 and being connected in the second housing 61 and with projection 55；Projection 55 is with One 5 and second 6 rotates against and follows the activity of arc-shaped through-hole 614；The size of contiguous block 66 is more than arc-shaped through-hole 614 Width, the side of contiguous block 66 is corresponding with the arc spring one end for stretching out arc-shaped limit block 64.Arc-shaped through-hole 614 and arc-shaped limit The quantity of block 64 is two groups, and two groups of arc-shaped limit blocks 64 are located between two groups of arc-shaped through-holes 614 respectively, form annular.

The effect of arc-shaped limit block 64 and arc-shaped through-hole 614 is the angle of rotation for the contiguous block 66 that limitation is connected with projection 55 Degree, arc-shaped limit block 64 limits the rotational angle of contiguous block 66, and arc-shaped through-hole 614 limits the rotational angle of projection 55, due to convex Block 55, contiguous block 66 are finally all connected with first 5, thus here by limitation projection 55, contiguous block 66 and arc-shaped limit block 64, Rotational angle between arc-shaped through-hole 614, the rotational angle of limitation first 5 and second 6.Prevent first 5 and second 6 360 ° are relatively rotated, prevents it from rotating excessive, the rotation amplitude of contiguous block 66 is limited in 90 °, as shown in fig. 1, saddle Component 2 only has 90 ° with respect to the rotational angle of headstock component 3.

Also, when folding bicycle is opened, on location base of the detent mechanism to first 5 and second 6, arc Shape limited block 64 can also provide the certain spacing stationkeeping ability of projection 55 simultaneously, additionally it is possible to bear human body weight on saddle component 2 The downward pressure applied, by the cooperation of arc-shaped limit block 64 and projection 55, effectively bears the pressure of this part human body, prevents The service life of the only damage of the locating dowel 623 in detent mechanism, the effectively detent mechanism of extension middle part X-shaped centre frame.

The two ends of arc-shaped limit block 64 are additionally provided with through hole, and spring is placed with its through hole, when bicycle be in X deployed conditions or During person's folded state, contiguous block 66 is contradicted with arc-shaped limit block 64.When bicycle is in deployed condition, once user presses Pressure ring shape presses button 50 by the positioning lift of x shape centre frames, and first 5 and second 6 can be under spring action, rapidly from exhibition Open state is changed to folded state, and vehicle frame moment is shunk, and bicycle is further folded to folded state by user afterwards, is being entered Enter before folded state, contiguous block 66 extrudes the spring on arc-shaped limit block 64 again, detent mechanism completes positioning, and bicycle enters Folded state.And when bicycle enters deployed condition from folded state, its order is identical with the order folded.

Two the first ball grooves 615, two article are arcuately respectively equipped with the medial surface of the second housing 61 of the both sides of through hole 614 One ball grooves 615 are located at the both sides of arc-shaped through-hole 614 respectively, and the medial surface of contiguous block 66 is provided with and two 615 pairs of the first ball grooves Second ball grooves 660 at two answered, are provided with multiple spacing balls 56 between the first ball grooves 615 and the second ball grooves 660.

The effect of contiguous block 66 is second 6 laminating tightly by contiguous block 66, arc-shaped through-hole 614 and projection 55 In on first 5, contiguous block 66 and second 6 clamping, therefore frictional force is also larger, and multiple spacing balls 56 herein are located at Between first ball grooves 615 and the second ball grooves 660, the frictional force of first 5 and second 6 rotation can be greatly reduced, and And clamping force therebetween is not reduced, extend service life while security is ensured.

Wherein, the shape of the second ball grooves can be with as shown in figure 9, the second ball grooves be in two arcuate line segments and and contiguous block Pivot be arranged concentrically, all spacing balls are respectively positioned in deep-slotted chip breaker, are competed with each other and are kept respective position.

Secondly, the shapes of the second ball grooves can also as shown in figure 8, the second ball grooves are made up of multiple hemispheric grooves, Each spacing ball is located in its respective hemispheric second ball grooves, compared with the second ball grooves in Fig. 9, and the of Fig. 8 Two ball grooves become apparent for the position limitation of spacing ball, are not likely to produce spacing ball and jump out and are adopted in phenomenon, the present embodiment With the second ball grooves in Fig. 8.

First 5 inner side outside wall surface and second 6 inner side outside wall surface on be respectively equipped with corresponding annular ball grooves 57, the balls 56 between two annular ball grooves 57 provided with multiple arrangements in a ring.

The ball grooves 57 of first 5 and second 6 are used for the placement of ball 56, after ball 56 is placed in ball grooves 57, The friction between first 5 and second 6 can be greatly reduced, rubbing when reducing abrasion reduction folding bicycle expansion or folding Wipe, be allowed to using more convenient.

Steering on folding bicycle：

It is the center driving component 63 in X-shaped centre frame at its steering core, center driving component 63 includes Center driving axle 631, headstock bevel gear 530, front-wheel bevel gear 650, the first travelling gear 633 and the second travelling gear 632, in Heart power transmission shaft 631 runs through and fixes the first travelling gear 633 and the second travelling gear 632, and the first travelling gear 633 and second is passed The synchronous axial system of moving gear 632, the first travelling gear 633 is connected with headstock bevel gear 530, the second travelling gear 632 and front-wheel Bevel gear 650 is connected；The two ends of center driving axle 631 are arranged with centre bearing, and 2 centre bearings are individually fixed in first 5 and second 6 in.

As shown in Figure 13 to Figure 16, headstock component 3 is connected with the first power transmission shaft 53, and common rotation, the first power transmission shaft 53 The inner there is headstock bevel gear 530, headstock bevel gear 530 rotates with headstock and drives the first travelling gear 633 to rotate, due to First travelling gear 633 and the second travelling gear 632 are both secured on center driving axle 631 and synchronous axial system, and the second transmission The front-wheel bevel gear 650 of gear 632 and the kinematic link 10 of front component 1 is together driven.Therefore, rotating headstock component 3 can lead to Cross center driving component 63 and deflection is transferred to front-wheel 13, reach the purpose that front-wheel 13 is turned to.

In the present embodiment, because headstock component 3 is fixed on first 5 with wheel assembly 4, and the same front-wheel of saddle component 2 Component 1 is fixed on second 6, visually gives people a kind of headstock with the one of trailing wheel 43, front-wheel 13 with the integral illusion of saddle, Headstock, which is rotated, will drive the sense organ illusion that rotates of trailing wheel 43, increase the curious degree of consumer, make folding in the present embodiment from Driving seems more mysterious.The deflection of headstock component 3 is cleverly finally transferred to by front-wheel 13 by center driving component 63, made Headstock component 3, which is rotated, drives front-wheel 13 to rotate, and folding bicycle is seemed more high-end, flexible.

Company on folding bicycle headstock component 3, saddle component 2, front component 1, wheel assembly 4 and X-shaped centre frame Connect mode：

First~the 4th connecting portion 400 respectively correspond to the first~the 4th installing port 511, the stepped running-on of connecting portion, The section of connecting portion is in round edge rectangle, and corresponding connecting portion seat bar 21, hollow head rod 31 etc. are placed equidistant.Rectangle Housing it is relative manufacture more simple, while having higher structural strength, be difficult compressive deformation, and circular rounding side makes company The surfaces such as socket part seat bar 21, hollow head rod 31 are more smooth, prevent the scratches such as scratch from leaving.

First~the 4th connecting portion 400 is provided with screwed hole.First~the 4th connecting portion 400 is used for the same X of each component Shape centre frame is connected, and docking is threaded into hole after finishing by fasteners such as bolts, each component is consolidated with X-shaped centre frame It is fixed.Fastener in the present embodiment uses Flat-head internal hexagonal cone screw, and the contact area of its solid timing screw is bigger, more firm Gu.

It is described above to make the preferred embodiment of the present invention, this hair is not departed from for the person of ordinary skill of the art On the premise of bright principle, some variations and modifications can also be made, these also should be regarded as protection scope of the present invention.

Claims (7)

1. a kind of folding bicycle of front and back wheel fit type, it is characterised in that including：

A, headstock component (3)；Including：Handrail (33), hollow head rod (31) and drive link (30), handrail (33) are fixed on transmission Bar (30) one end, drive link (30) is arranged in hollow head rod (31) inside, and drive link (30) can 360 degree of rotations；

B, front component (1)；Including：Kinematic link (10) and front-wheel (13), front-wheel (13) are rotationally connected with kinematic link (10) One end, kinematic link (10) is connected with drive link (30), kinematic link (10) parallel to front-wheel (13) rotational plane and Not in the rotational plane of front-wheel (13)；

C, saddle component (2), including：Seat bar (21) and cushion (20), cushion (20) are fixed on a bar (21) upper end；

D, wheel assembly (4), including trailing wheel (43), rear wheel frame (40) and power output system (41), power output system (41) In the middle part of rear wheel frame (40), trailing wheel (43) is rotationally connected with the rear end of rear wheel frame (40)；

E, folding centre frame, the centre frame respectively with headstock component (3), front component (1), saddle component (2), trailing wheel Component (4) is connected；

When cycling straight-going state, the front-wheel and trailing wheel are in the same plane, handrail (33) rotating 180 deg, the front-wheel On the parallel surface of trailing wheel；

The centre frame is in X-shaped, and centre frame includes：With second in the middle part of first (5) and second (6), first (5) (6) the rotatable installation in middle part；

Described first (5) two ends connect headstock component (3) and wheel assembly (4) respectively, and described second (6) two ends connect respectively Connect front component (1) and saddle component (2)；

Described second (6) include the kinematic link in the second housing (61), at least two groups detent mechanisms (62) and front component (10) second driving shaft (65) and center driving component (63) being connected；

Second driving shaft (65) and detent mechanism (62) are located in the second housing (61), and center driving component (63) is installed through First (5) and the center of second (6), second driving shaft (65) the inner drive connection center driving component (63), outer end is stretched To the second installing port (611)；

The detent mechanism (62) includes being fixed on positioning matrix (622) on the second housing (61), positioning gland (620), fixed Position spring (621) and locating dowel (623)；Ladder hole is provided with the positioning matrix (622), ladder hole is by close to first (5) the first hole (6221) and the second hole (6220) away from first (5) are constituted；Locating dowel (623) upper end is provided with fixed Potential head, positioning head is located in the second hole (6220), is located in the middle part of locating dowel (623) in the first hole (6221)；Positioning gland (620) It is fixed on positioning matrix (622) outer end；Retaining spring (621) is compressed in positioning gland (620) between positioning head, and is contained in In second hole (6220)；

Described first (5) include the first housing (51), annular and press button (50) and spring (502), the first housing (51) remote the Button groove (513) is pressed in the side of two (6) provided with accommodate that annular presses button (50), and annular, which is pressed, to be provided with the inside of button (50) through pressing button groove (513) the top pressure post (501) of bottom land, the spring (502), which is located at, to be pressed in button groove (513) and is enclosed on top pressure post (501)；

First housing (51) is provided with positioning through hole (52) close to the side of second (6)；Positioning through hole (52) and top pressure post (501) quantity is matched with locating dowel (623) respectively, and top pressure post (501) is inner to correspond to the positioning through hole (52) respectively；

When first (5) are in X-shaped with second (6), the positioning through hole (52) is corresponding with the locating dowel (623) respectively；It is fixed Position post (623) lower end is stretched out in the positioning through hole (52) of second (6) to first (5)；

Torsion is pressed when pressing pressure ring shape, top pressure post (501) is moved outwardly and into positioning through hole (52), and locating dowel (623) is extruded Positioning through hole (52) is allowed in the hole of retraction first (6221), locating dowel (623) is no longer limited first (5) and second (6) Rotation, first (5) and second (6) can be rotated again.

2. the folding bicycle of front and back wheel fit type according to claim 1, it is characterised in that：The center driving component (63) center driving axle (631), headstock bevel gear (530), front-wheel bevel gear (650), the first travelling gear (633) and the are included Two travelling gears (632), the center driving axle (631) is run through and fixes the first travelling gear (633) and the second travelling gear (632), the first travelling gear (633) and the second travelling gear (632) synchronous axial system, the first travelling gear (633) are bored with headstock Gear (530) is connected, and the second travelling gear (632) is connected with front-wheel bevel gear (650)；Center driving axle (631) two ends Centre bearing (630) is arranged with, 2 centre bearings (630) are individually fixed in first (5) and second (6).

3. the folding bicycle of front and back wheel fit type according to claim 1, it is characterised in that：Close to first (5) Second housing (61) is provided with arc-shaped through-hole (614) and the arc-shaped limit block (64) being fixed on the second housing (61), the arc Shape through hole (614) and arc-shaped limit block (64) are centered around center driving component (63) outer circumferential side and on same circumference；

X-shaped centre frame also includes position-limit mechanism, and position-limit mechanism includes being fixed on the first housing (51) and stretches into arc-shaped through-hole (614) Projection (55) and the contiguous block (66) that is connected in the second housing (61) and with projection (55)；Projection (55) is with first (5) and second (6) are rotated against and follow arc-shaped through-hole (614) activity；The size of the contiguous block (66) is logical more than arc The width in hole (614).

4. the folding bicycle of front and back wheel fit type according to claim 3, it is characterised in that：In arc-shaped limit block (64) Provided with the arc spring hole (641) along its arc length direction, arc spring is arranged in arc spring hole (641), and two The arc spring hole (641), the side of contiguous block (66) and the arc spring for stretching out the arc-shaped limit block (64) are stretched out in end One end correspondence.

5. the folding bicycle of front and back wheel fit type according to claim 1, it is characterised in that：The front component (1) Also include the first axle assembly (12), hollow front-wheel loop bar (11), kinematic link (10) is arranged in hollow front-wheel loop bar (11)；

First axle assembly (12) includes bolt, bearing and nut, and front-wheel (13) center is fixed on bearing, the bolt Through the lower end attaching nut of bearing and kinematic link (1).

6. the folding bicycle of front and back wheel fit type according to claim 1, it is characterised in that：The power output system (41) by flywheel (412), chain wheel (411), pedal (414), chain (413) and rotating turret (410) group for supplying chain wheel (411) to fix Into；

The rotating turret (410) is rotationally connected with the middle part of rear wheel frame (40)；

Rotating turret (410) surface is provided with for the fixed installing port (4132) of pedal (414), pedal (414) and installing port (4132) Rotate connection or rotated by crank and connected.

7. the folding bicycle of the front and back wheel fit type according to claim 2 or 4 or 5, it is characterised in that：First (5) Corresponding annular ball grooves (57), two annulars are respectively equipped with outside wall surface on the inside of the outside wall surface of inner side and second (6) Ball (56) between ball grooves (57) provided with multiple arrangements in a ring.