CN219215268U

CN219215268U - Folding bicycle

Info

Publication number: CN219215268U
Application number: CN202320274051.8U
Authority: CN
Inventors: 王维权
Original assignee: Shenzhen Paige Technology Co ltd
Current assignee: Shenzhen Paige Technology Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-20
Anticipated expiration: 2033-02-21

Abstract

The utility model relates to the technical field of bicycles, in particular to a folding bicycle which comprises two front wheels, a transmission structure, a bicycle head assembly, a shock absorbing assembly, a bicycle tail assembly provided with rear wheels and a driving assembly; one end of the transmission structure is provided with a driving shaft, the other end of the transmission structure is provided with a driven shaft, and the two front wheels are respectively connected with the driven shaft to form a front wheel assembly with a transmission structure part positioned between the two front wheels and a gap between the two front wheels; the driving component is connected with the driving shaft in a folding way and can be folded at the side of the front wheel; the shell of the transmission structure is movably connected with the shock absorption assembly, the tail assembly is connected with the shock absorption assembly in a folding way, the tail assembly can be folded between two front wheels around the connecting end of the tail assembly, and the rear wheels can be folded to be parallel to the two front wheels; the head assembly is foldable and connected to the shock absorbing assembly, and the head assembly can be folded around the connecting end to be clung to the front wheel. The folding bicycle provided by the utility model has small volume after folding and is easy to store and carry.

Description

Folding bicycle

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to a folding bicycle.

Background

Folding bicycles belong to a category of bicycles, the length of the bicycle can be reduced by about 45% after the bicycle is folded, and the whole bicycle can be put into a special folding bag or a trunk of an automobile after being folded. Meanwhile, the vehicle can be folded and unfolded manually without using external tools in the folding process.

The folding bicycle for the transportation means of riding instead of walk in the market at present mainly folds the mode through the folding joint of the frame and the folding joint of the vertical pipe of the folding bicycle, folds the front wheel and the rear wheel together. The folded bicycle is still large in size, occupies large space, is not easy to store and carry, and causes poor use experience for users.

Disclosure of Invention

The utility model aims to provide a folding bicycle, and the whole bicycle integrally forms a folding structure that a head assembly, a body assembly and a tail assembly are sequentially wound around the periphery of a front wheel assembly and a driving assembly is wound around the side of the front wheel assembly when being folded, so that the folding bicycle is small in size and easy to store and carry after being folded.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a folding bicycle comprises two front wheels, a transmission structure, a bicycle head component, a shock absorbing component, a bicycle tail component provided with rear wheels and a driving component;

one end of the transmission structure is provided with a driving shaft, the other end of the transmission structure is provided with a driven shaft, the two front wheels are respectively connected with the driven shaft to form a front wheel assembly, the two front wheels are arranged at intervals, and the transmission structure part is positioned between the two front wheels; the driving component is connected with the driving shaft in a folding way and can be folded at the side of the front wheel component;

The shell of the transmission structure is movably connected with the shock absorption assembly, the tail assembly is connected with the shock absorption assembly in a folding way, the tail assembly can be folded between two front wheels around the connecting end of the tail assembly, and the rear wheels can be folded to be parallel to the two front wheels; the head assembly is connected to the shock absorbing assembly in a foldable manner, and the head assembly can be folded around the connecting end of the head assembly to be clung to the front wheel.

Further, the shock assembly comprises a shock absorber, a shock absorber bracket, a first shock connecting rod and a second shock connecting rod;

the shock absorber is arranged in the shock absorber bracket, the shock absorber is provided with a movable end, the top of the movable end is provided with a first shaft hole, the first shock-absorbing connecting rod is movably connected to the shock absorber bracket through a bearing, one end of the first shock-absorbing connecting rod is movably connected with the first shaft hole, and the other end of the first shock-absorbing connecting rod is movably connected with the transmission structure through the bearing;

one end of the second shock-absorbing connecting rod is movably connected to the shock absorber bracket through a bearing, and the other end of the second shock-absorbing connecting rod is movably connected with the transmission structure through a bearing.

Further, the shock absorber support comprises a shock absorber left support and a shock absorber right support, the first shock absorber connecting rod comprises a first left shock absorber connecting rod and a first right shock absorber connecting rod, and the second shock absorber connecting rod comprises a second left shock absorber connecting rod and a second right shock absorber connecting rod;

The left shock absorber bracket and the right shock absorber bracket are symmetrically arranged, and the shock absorber is positioned between the left shock absorber bracket and the right shock absorber bracket; the first left shock-absorbing connecting rod is movably connected to the left bracket of the shock absorber through a bearing, one end of the first left shock-absorbing connecting rod is movably connected with the first shaft hole, and the other end of the first left shock-absorbing connecting rod is movably connected with the transmission structure through a bearing; the first right shock-absorbing connecting rod is movably connected to the right support of the shock absorber through a bearing, one end of the first right shock-absorbing connecting rod is movably connected with the first shaft hole, and the other end of the first right shock-absorbing connecting rod is movably connected with the transmission structure through a bearing;

the bottom end of the shock absorber is provided with a second shaft hole, and the second shaft hole and the other end of the shock absorber right bracket are movably connected through a connecting shaft which sequentially penetrates through the other end of the shock absorber left bracket;

one end of the second left shock-absorbing connecting rod is connected with the left bracket of the shock absorber through a bearing, and the other end of the second left shock-absorbing connecting rod is connected with the transmission structure through a bearing;

one end of the second right shock-absorbing connecting rod is connected with the right support of the shock absorber through a bearing, and the other end of the second right shock-absorbing connecting rod is connected with the transmission structure through a bearing.

Further, a U-shaped opening and a connecting hole are formed in the front end of the tail assembly, and a quick-release switch detachably connected with the U-shaped opening and a connecting shaft movably connected with the connecting hole are respectively arranged on the shock absorbing assembly;

The quick-release switch comprises a screw, wherein two ends of the screw are respectively provided with a limit nut, and the inner side of the limit nut is provided with an inner groove matched with the limit protrusion;

the quick-release switch is in an opening state and a closing state, and in the closing state, the inner groove is clamped with the limiting protrusion, so that the quick-release switch can be limited in the U-shaped opening; when in an open state, the inner groove is separated from the limiting protrusion, so that the screw rod can be separated from the U-shaped opening, and the frame can rotate around the connecting shaft.

Further, the quick release switch also comprises a locking rod and a return spring;

the locking rod is arranged at one end of the screw rod; two return springs are all sleeved on the screw rod, one end of each return spring is abutted against the left support of the shock absorber, the other end of each return spring is abutted against the left limit nut, one end of each return spring is abutted against the right support of the shock absorber, and the other end of each return spring is abutted against the right limit nut.

Further, the driving assembly comprises a left crank, a right crank, a first lower limit part and a second lower limit part;

the left crank is connected with the left end of the driving shaft through a first ratchet wheel, and the right crank is connected with the right end of the driving shaft through a second ratchet wheel;

The first lower limiting part is arranged at a first position between the transmission structure and the left crank and is used for limiting the rotation lower limit of the left crank; the second lower limiting part is arranged at a second position between the transmission structure and the right crank and is used for limiting the rotation lower limit of the right crank.

Further, the driving assembly further comprises a first upper limit part and a second upper limit part; the first upper limiting part is arranged on the left side surface of the transmission structure and close to the left end position of the driving shaft and is used for limiting the upper rotation limit of the left crank;

the second upper limiting part is arranged on the right side surface of the transmission structure and close to the right end position of the driving shaft and is used for limiting the rotation upper limiting part of the right crank.

Further, a first connecting pipe is arranged at the rear end of the left crank, the first connecting pipe is provided with a first interface and a second interface, the axes of the first interface and the second interface are mutually perpendicular, the first interface is sleeved with the left crank, the second interface is connected with a left pedal, and the left pedal can be folded around the rear end of the left crank;

the rear end of the right crank is provided with a second connecting pipe, the second connecting pipe is provided with a third interface and a fourth interface, the axes of the third interface and the fourth interface are mutually perpendicular, the third interface is sleeved with the right crank, the fourth interface is connected with a right pedal, and the right pedal can be folded around the rear end of the right crank;

The first connecting pipe further comprises a first anti-rotation interface, the left crank further comprises a first anti-rotation component, and the first anti-rotation component penetrates through the first anti-rotation interface to be detachably clamped with the left crank and limit the first connecting pipe;

the second connecting pipe further comprises a second rotation preventing interface, the right crank further comprises a second rotation preventing assembly, and the second rotation preventing assembly penetrates through the second rotation preventing interface to be detachably clamped with the right crank and limit the second connecting pipe.

Further, the tail assembly includes: the device comprises a frame, a suspension bracket, a left wheel arm, a right wheel arm, a left rear wheel and a right rear wheel;

the hanging frame comprises a left connecting port, a right connecting port and a connecting rod, and the whole hanging frame is inverted T-shaped; one end of the left wheel arm is connected with the left rear wheel, the other end of the left wheel arm is connected with the left connecting port, and the left wheel arm can rotate by taking the axis of the left connecting port as a central shaft; one end of the right wheel arm is connected with the right rear wheel, the other end of the right wheel arm is connected with the right connecting port, and the right wheel arm can rotate by taking the axis of the right connecting port as a central shaft;

the connecting rod is movably connected with the frame;

the left rear wheel and the right rear wheel are provided with a using state position and a folding state position; when the left rear wheel and the right rear wheel are in the use state position, the left rear wheel and the right rear wheel are in an outer splayed shape integrally, and when the left rear wheel and the right rear wheel are in the folding state position, the left rear wheel, the right rear wheel and the frame are parallel integrally.

Further, the vehicle head assembly includes: the vehicle head pipe, the V-shaped connector, the left handle and the right handle; wherein, the liquid crystal display device comprises a liquid crystal display device,

the V-shaped connector is connected to the top end of the headstock tube and is provided with a first connecting port and a second connecting port which are obliquely downward;

the left handle is movably connected with the first connecting port, and can rotate around the first connecting port by taking the axis of the first connecting port as a central axis; the right handle is movably connected with the second connecting port, and can rotate around the second connecting port by taking the axis of the second connecting port as a central axis;

the left handle and the right handle are provided with a use state position and a folding state position; when the left handle and the right handle are in the use state positions, the left handle, the right handle and the head tube are integrally Y-shaped, and when the left handle and the right handle are in the folding state positions, the left handle and the right handle are integrally parallel to the head tube.

Compared with the prior art, the utility model has the beneficial effects that:

the shock absorbing assembly connected between the transmission structure and the frame can reduce the impact of the road surface during the running process of the bicycle and improve the comfort; when folding, the locomotive subassembly is folding to the front wheel subassembly front side around its link, the rear of a vehicle subassembly is folding and partly block into between the double round of front wheel subassembly to the front wheel subassembly rear side around its link, drive assembly roll over in front wheel subassembly side for whole car wholly forms locomotive subassembly, automobile body subassembly and rear of a vehicle subassembly around in proper order in front wheel subassembly periphery, drive assembly around the beta structure in front wheel subassembly side. After folding, the whole vehicle is only slightly bigger than the wheels of the front wheel assembly, for example, when the wheels of the front wheel assembly are made to be 9 inches, the whole vehicle after folding is only slightly bigger than the A4 paper, and the whole vehicle can be put into a knapsack, so that the folding backpack is very convenient to store and carry.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Wherein:

FIG. 1 is an exploded view of a structure of a folding bicycle in an embodiment;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic view of a folding bicycle in a folded configuration;

FIG. 5 is a folding effect diagram of the folding bicycle in the embodiment;

FIG. 6 is an exploded view of the structure of the suspension assembly of the embodiment;

FIG. 7 is a structural exploded view of the driving structure in the embodiment;

FIG. 8 is an exploded view of the structure of the tail assembly of the present embodiment;

FIG. 9 is an exploded view of the structure of the tail assembly of another embodiment;

FIG. 10 is an exploded view of the structure of the head assembly of the embodiment;

FIG. 11 is an exploded view of the structure of the handlebar in the example;

fig. 12 is a schematic structural view of a V-joint in the embodiment.

In the figure:

10. a front wheel assembly; 101. A front wheel;

20. a transmission structure; 201. A drive shaft;

30. a headstock assembly; 301. a head tube; 302. a V-shaped joint; 3021. a first connection port; 30211. the first limiting notch; 30212. the second limiting notch; 3022. a second connection port; 30221. a third limit notch; 30222. a fourth limit notch; 303. a left handle; 3031. a third joint; 30311. a first opening; 30312. a first limit hook; 3032. a first stop collar; 3033. a first limit screw; 3034. a third spring; 304. a right handle; 3041. a fourth joint; 30411. a second opening; 30412. a second limit hook; 3042. a second limiting ring; 3043. the second limit screw; 3044. a fourth spring;

40. a shock absorbing assembly; 401. a shock absorber; 4011. a first shaft hole; 4012. a second shaft hole; 402. a shock absorber bracket; 4021. a left bracket of the shock absorber; 4022. a right bracket of the shock absorber; 403. a first shock absorbing link; 4031. a first left shock link; 4032. a first right shock link; 404. a second shock link; 4041. a second left shock link; 4042. a second right shock link; 405. a quick release switch; 4051. a screw; 4052. a limit nut; 40521. an inner groove; 4053. a locking lever; 4054. a return spring; 406. a connecting shaft;

50. A tail assembly; 501. a frame; 5011. a U-shaped opening; 50111. a limit protrusion; 5012. a connection hole; 502. a hanging frame; 5021. a left connecting port; 5022. a right connecting port; 5023. a connecting rod; 503. a left wheel arm; 5031. a first fork; 5032. a first joint; 5033. a first positioning member; 50331. a first limit cover; 503311, a first limit bump; 503312, first connecting shaft; 50332. a first spring; 50333. a first screw; 50334. a first fixed shaft; 50335. a first positioning member bearing; 504. a right wheel arm; 5041. a second fork; 5042. a second joint; 5043. a second positioning member; 50431. the second limit cover; 504312, a second connecting shaft; 50432. a second spring; 50433. a second screw; 50434. a second fixed shaft; 50435. a second positioning member bearing; 505. a left rear wheel; 506. a right rear wheel;

60. a drive assembly; 601. a left crank; 6011. a first connection pipe; 60111. a first interface; 60112. a second interface; 60113. a first anti-rotation interface; 6012. a left pedal; 60121. a first connection sleeve; 6013. a first anti-rotation assembly; 60131. a spring plate; 60132. a first anti-rotation baffle; 60133. a screw; 602. a right crank; 6021. a second connection pipe; 60211. a third interface; 60212. a fourth interface; 60213. a second anti-rotation interface; 6022. right foot pedal; 60221. a second connecting sleeve; 6023. a second anti-rotation assembly; 603. a first lower limit part; 6031. a first elastic block; 604. a second lower limit part; 6041. a second elastic block; 605. a first ratchet; 6051. a first tooth holder; 6052. a first elastic sheet; 6053. a first ratchet; 6054. a first tooth sleeve; 606. a second ratchet; 6061. a second tooth holder; 6062. a second spring plate; 6063. a second ratchet; 6064. a second tooth sleeve; 607. a first upper limit part; 6071. a first torsion spring; 6072. a first limit claw; 608. a second upper limit part; 6081. a second torsion spring; 6082. a second limit claw;

70. A bearing; 701. a first insert; 702. and a second insert.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings.

As shown in fig. 1 to 12, an embodiment of the present utility model provides a folding bicycle comprising two front wheels 101, a transmission structure 20, a head assembly 30, a shock absorbing assembly 40, a tail assembly 50 provided with rear wheels, and a driving assembly 60;

one end of the transmission structure 20 is provided with a driving shaft 201, the other end is provided with a driven shaft, and the two front wheels 101 are respectively connected with the driven shaft to form a front wheel assembly 10 in which the two front wheels 101 are arranged at intervals and the transmission structure 20 is partially positioned between the two front wheels 101; the driving assembly 60 is connected with the driving shaft 201 in a folding way and can be folded at the side of the front wheel assembly 10;

the shell of the transmission structure 20 is movably connected with the shock absorbing assembly 40, the tail assembly 50 is connected with the shock absorbing assembly 40 in a folding way, the tail assembly 50 can be folded between the two front wheels 101 around the connecting end of the tail assembly 50, and the rear wheels can be folded to be parallel to the two front wheels 101; the head unit 30 is foldably connected to the suspension unit 40, and the head unit 30 is foldable about its connection end to abut the front wheel 101.

In this embodiment, the driving structure 20 is provided with a driving shaft 201 and a driven shaft, and the driving shaft 201 transmits power to the driven shaft through the inside of the driving structure 20, so that the driven shaft can drive the front wheel 101 to move. The transmission structure 20 is movably connected with the shock absorbing assembly 40, so that the shock generated by the front wheel 101 can be buffered by the shock absorbing assembly 40, and the driving comfort of the bicycle is improved. The above-mentioned driving unit 60 refers to a left crank 601 and a right crank 602, and unlike the conventional crank for riding in a winding, the crank of the present utility model is a riding manner of stepping up and down, and when folding, the left crank 601 is folded on the left side of one front wheel 101 on the left, and the right crank 602 is folded on the right side of one front wheel 101 on the right, i.e. the driving unit 60 is folded on the side of the front wheel unit 10. The handlebar assembly 30 refers to a handlebar of a bicycle, and is connected with the handlebar and the handlebar tube 301, wherein the handlebar tube 301 is telescopic, and as shown in fig. 5, the handlebar can be in a structure parallel to the handlebar tube 301 after being folded; the structure may be such that the front wheel 101 is closely attached to the head pipe 301 after folding, and the head pipe 301 and the handlebar are L-shaped after folding, and closely attach to and surround the front wheel 101 after folding. The tail assembly 50 includes a frame 501 and a rear wheel, wherein the frame 501 may be a cross beam, and the rear wheel is connected to the tail of the cross beam; when folded, the frame 501 is clamped between the two front wheels 101, and the rear wheels are folded to the sides of the front wheels 101 and parallel to the front wheels 101. In summary, when the folding bicycle provided by the utility model is folded, the front wheel assembly 30 is folded around the front side of the front wheel assembly 10 at the connecting end, the rear wheel assembly 50 is folded around the rear side of the front wheel assembly 10 at the connecting end and is partially clamped between the two wheels of the front wheel assembly 10, and the driving assembly 60 is folded at the side of the front wheel assembly 10, so that the whole bicycle integrally forms a folding structure that the front wheel assembly 30, the body assembly and the rear wheel assembly 50 sequentially surround the periphery of the front wheel assembly 10 and the driving assembly 60 surrounds the side of the front wheel assembly 10.

In one embodiment, shock assembly 40 includes a shock 401, a shock bracket 402, a first shock link 403 and a second shock link 404;

the shock absorber 401 is arranged in the shock absorber bracket 402, the shock absorber 401 is provided with a movable end, the top of the movable end is provided with a first shaft hole 4011, the first shock absorbing connecting rod 403 is movably connected to the shock absorber bracket 402 through a bearing 70, one end of the first shock absorbing connecting rod 403 is movably connected with the first shaft hole 4011, and the other end of the first shock absorbing connecting rod 403 is movably connected with the transmission structure 20 through the bearing 70;

one end of the second shock link 404 is movably coupled to the shock mount 402 via the bearing 70 and the other end is movably coupled to the transmission structure 20 via the bearing 70.

In this embodiment, the shock absorber 401 is mounted inside the shock absorber bracket 402, the top of the movable end of the shock absorber 401 is provided with a first shaft hole 4011, the first shock-absorbing connecting rod 403 is movably connected to the shock absorber bracket 402 through the bearing 70, one end of the first shock-absorbing connecting rod 403 is movably connected to the first shaft hole 4011, the other end of the first shock-absorbing connecting rod 403 is movably connected to the transmission structure 20 through the bearing 70, that is, the transmission structure 20 can be connected to form a shock-absorbing structure through the shock absorber bracket 402, the first shock-absorbing connecting rod 403 and the movable end of the shock absorber 401, and the shock on the transmission structure 20 is buffered, so that the riding comfort is improved. The bearing 70 includes the first insert 701 and the second insert 702, as shown in fig. 6, the second insert 702 is sleeved in the first insert 701, and the first insert 701 and the second insert 702 can slide relative to each other, so that wear of the first shock absorbing connecting rod 403 in the shock absorbing process is reduced, and the shock absorbing effect is conveniently maintained by periodically replacing the first insert 701 or the second insert 702. One end of the second shock-absorbing connecting rod 404 is movably connected to the shock absorber bracket 402 through the bearing 70, the other end of the second shock-absorbing connecting rod 404 is movably connected with the transmission structure 20 through the bearing 70, and referring to fig. 4 and 6, that is, the transmission structure 20 is connected with the shock absorber bracket 402, the first shock-absorbing connecting rod 403, the second shock-absorbing connecting rod 404 and the shock absorber 401 to form a shock-absorbing structure composed of the first shock-absorbing connecting rod 403 and the second shock-absorbing connecting rod 404, so that the shock-absorbing effect of the whole vehicle is further enhanced.

In one embodiment, the shock mount 402 includes a shock left mount 4021 and a shock right mount 4022, the first shock link 403 includes a first left shock link 4031 and a first right shock link 4032, and the second shock link 404 includes a second left shock link 4041 and a second right shock link 4042;

the shock absorber left support 4021 and the shock absorber right support 4022 are symmetrically arranged, and the shock absorber 401 is positioned between the shock absorber left support 4021 and the shock absorber right support 4022; the first left shock-absorbing connecting rod 4031 is movably connected to the left shock absorber bracket 4021 through a bearing 70, one end of the first left shock-absorbing connecting rod 4031 is movably connected to the first shaft hole 4011, and the other end of the first left shock-absorbing connecting rod 4031 is movably connected to the transmission structure 20 through the bearing 70; the first right shock-absorbing connecting rod 4032 is movably connected to the shock absorber right bracket 4022 through a bearing 70, one end of the first right shock-absorbing connecting rod 4032 is movably connected to the first shaft hole 4011, and the other end of the first right shock-absorbing connecting rod 4032 is movably connected to the transmission structure 20 through the bearing 70;

the bottom end of the shock absorber 401 is provided with a second shaft hole 4012, and the second shaft hole 4012 and the other end of the shock absorber right bracket 4022 are movably connected by passing through the other end of the shock absorber left bracket 4021 and the other end of the shock absorber right bracket 4022 in sequence through a connecting shaft 406;

one end of the second left shock-absorbing connecting rod 4041 is connected with the left shock absorber bracket 4021 through a bearing 70, and the other end of the second left shock-absorbing connecting rod is connected with the transmission structure 20 through the bearing 70;

One end of the second right shock-absorbing connecting rod 4042 is connected with the shock absorber right bracket 4022 through a bearing 70, and the other end is connected with the transmission structure 20 through the bearing 70.

In this embodiment, the shock absorber bracket 402 includes a shock absorber left bracket 4021 and a shock absorber right bracket 4022, the first shock absorber link 403 includes a first left shock absorber link 4031 and a first right shock absorber link 4032, and the shock absorber left bracket 4021 and the shock absorber right bracket 4022 are symmetrically disposed, and the first left shock absorber link 4031 and the first right shock absorber link 4032 are symmetrically disposed. One end of the shock absorber left bracket 4021 and one end of the shock absorber right bracket 4022 which are symmetrical are connected to the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 which are symmetrical through bearings 70, refer to fig. 1 and 6, namely, one end of the shock absorber left bracket 4021 and the middle position of the first left shock absorbing connecting rod 4031 are connected through bearings 70, one end of the shock absorber right bracket 4022 and the middle position of the first right shock absorbing connecting rod 4032 are connected through bearings 70, and two sides of the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 are respectively connected with the shock absorber 401 and the transmission structure 20, so that the shock absorber 401 and the transmission structure 20 can move along the middle positions of the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 like a seesaw, and the shock of the whole car is buffered properly by the shock absorber 401. More specifically, the bottom end of the shock absorber 401 is provided with a second shaft hole 4012, and the second shaft hole 4012 and the other end of the shock absorber left bracket 4021 and the other end of the shock absorber right bracket 4022 are movably connected through a connecting shaft 406, and referring to fig. 1, 4 and 6, the connecting shaft 406 movably connects the shock absorber left bracket 4021, the shock absorber right bracket 4022, the shock absorber 401 and the frame 501 together through the second shaft hole 4012 and the connecting hole 5012 on the shock absorber 401, and connects the frame 501, the shock absorbing assembly 40 and the transmission structure 20. The second shock-absorbing connecting rod 404 includes a second left shock-absorbing connecting rod 4041 and a second right shock-absorbing connecting rod 4042, one end of the second left shock-absorbing connecting rod 4041 is connected with the shock absorber left bracket 4021 through a bearing 70, and the other end of the second left shock-absorbing connecting rod 4041 is connected with the transmission structure 20 through a bearing 70; symmetrically, one end of the second right shock-absorbing connecting rod 4042 is connected with the shock absorber right bracket 4022 through a bearing 70, and the other end of the second right shock-absorbing connecting rod 4042 is connected with the transmission structure 20 through the bearing 70 to form a double-arm supporting structure of the second left shock-absorbing connecting rod 4041 and the second right shock-absorbing connecting rod 4042, so that stress in the shock process is more uniform, and shock-absorbing stability is improved.

In one embodiment, the front end of the tail assembly 50 is provided with a U-shaped opening 5011 and a connecting hole 5012, and the shock absorbing assembly 40 is respectively provided with a quick release switch 405 detachably connected with the U-shaped opening 5011 and a connecting shaft 406 movably connected with the connecting hole 5012;

the two sides of the U-shaped opening 5011 are respectively provided with a limit bulge 50111, the quick release switch 405 comprises a screw 4051, two ends of the screw 4051 are respectively provided with a limit nut 4052, and the inner side of the limit nut 4052 is provided with an inner groove 40521 matched with the limit bulge 50111;

the quick release switch 405 has an opening state and a closing state, and in the closing state, the inner groove 40521 is clamped with the limiting protrusion 50111, so that the quick release switch 405 can be limited in the U-shaped opening 5011; in the open state, the inner groove 40521 is separated from the limiting projection 50111, so that the screw 4051 can be separated from the U-shaped opening 5011, and the frame 501 can rotate around the connecting shaft 406.

In the present embodiment, referring to fig. 1, 4 and 8, the front end of the tail assembly 50 is provided with a U-shaped opening 5011 and a connecting hole 5012, that is, the U-shaped opening 5011 and the connecting hole 5012 are both at the front end of the frame 501. The frame 501 can be of a structure similar to a cross beam as a whole, plays a role in connecting a rear wheel and the shock assembly 40, the bracket of the shock assembly 40 is movably connected with the connecting hole 5012 of the frame 501 through the connecting shaft 406, the quick release switch 405 is arranged on the bracket of the shock assembly 40, the U-shaped opening 5011 on the frame 501 can be clamped on the screw 4051 for fixing, the screw 4051 acts like a fixing pin, and the movable connection relation between the shock assembly 40 and the frame 501 can be limited to be fixedly connected. Conversely, when the folding bicycle is needed to be folded, the limit nuts 4052 at the two ends of the screw 4051 on the quick-release switch 405 are loosened, the inner groove 40521 at the inner side of the limit nut 4052 is separated from the U-shaped limit protrusion 50111 at the outer side of the U-shaped opening 5011, the U-shaped opening 5011 is not limited by the inner groove 40521, the U-shaped opening 5011 is separated from the screw 4051, and only the connecting shaft 406 is left between the shock absorbing assembly 40 and the bicycle frame 501 to realize rotating folding, and accordingly, the folding bicycle frame is quickly disassembled when being fixed

The limit nuts 4052 at the two ends of the closed screw 4051 are locked, so that the inner grooves 40521 of the limit nuts 4052 are clamped with the limit protrusions 50111 of the U-shaped openings 5011, and the U-shaped openings 5011 clamp the screw 4051 to realize the fixing function.

In one embodiment, the quick release switch 405 also includes a locking lever 4053 and two return springs 4054;

a locking lever 4053 is provided at one end of the screw 4051; two return springs 4054 are both sleeved on the screw 4051, one end of one return spring 4054 is abutted against the left shock absorber bracket 4021, the other end is abutted against the left limit nut 4052, one end of the other return spring 4054 is abutted against the right shock absorber bracket 4022, and the other end is abutted against the right limit nut 4052.

In this embodiment, the locking lever 4053 is mounted on one end of the screw 4051 of the quick release switch 405, the quick release of the screw 4051 and the U-shaped opening 5011 can be achieved by pulling the locking lever 4053, and an arc portion can be provided for a limit nut 4052 adjacent to the locking lever 4053, so that the locking lever 4053 is not easy to be loosened due to vibration in the locked state. And two sides of the screw 4051 between the limit nut 4052 and the shock assembly 40 are sleeved with a return spring 4054, so that the limit nut 4052 can be quickly sprung open when the locking rod 4053 is released, the limit state of the inner groove 40521 and the limit protrusion 50111 is released, and quick folding is realized.

In one embodiment, the drive assembly 60 includes a left crank 601, a right crank 602, a first lower limit 603, and a second lower limit 604;

the left crank 601 is connected with the left end of the driving shaft 201 through a first ratchet 605, and the right crank 602 is connected with the right end of the driving shaft 201 through a second ratchet 606;

the first lower limiting part 603 is disposed at a first position between the transmission structure 20 and the left crank 601, and is used for limiting the rotation lower limit of the left crank 601; the second lower limiting portion 604 is disposed at a second position between the transmission structure 20 and the right crank 602, and is used for limiting the rotation lower limit of the right crank 602.

The drive assembly 60 further includes a first upper limit 607 and a second upper limit 608; the first upper limit portion 607 is disposed on the left side surface of the transmission structure 20 near the left end of the driving shaft 201, and is used for limiting the rotation upper limit of the left crank 601;

the second upper limit part 608 is disposed on the right side surface of the transmission structure 20 near the right end of the driving shaft 201, and is used for limiting the rotation upper limit of the right crank 602.

More specifically, the left end of the connecting shaft 406 is connected with a first lower limit part 603, the end part of the first lower limit part 603 is provided with a first elastic block 6031, and the left crank 601 is abutted against the first elastic block 6031 when being positioned at a lower rotation limit position; the right end of the connecting shaft 406 is connected with a second lower limiting part 604, a second elastic block 6041 is arranged at the end part of the second lower limiting part 604, and the right crank 602 is abutted against the second elastic block 6041 when being positioned at the rotation lower limit position.

In this embodiment, unlike the conventional pedaling bicycle, the cranks on the left and right sides of the conventional pedaling bicycle continuously circulate completely in the use process, but the left crank 601 and the right crank 602 of the folding bicycle reciprocate up and down alternately to perform a curved motion, so that in the downward movement process of the cranks of the bicycle, in order to prevent the cranks from continuing to perform a circular motion, the movement amplitude is too large to make it difficult for a user to grasp balance, so that a lower limit part is required to limit the movement. When the user needs to rest, the lower limiting part can also support the crank, specifically, the two ends of the driving shaft 201 are respectively connected with the left crank 601 and the right crank 602, the power of the two cranks is transmitted to the transmission structure 20 connected with the middle part, and then the left front wheel 101 and the right front wheel 101 are driven to rotate. The front ends of the left crank 601 and the right crank 602 are respectively connected to the two sides of the transmission structure 20 and are positioned at the upper part of the upper end of the transmission structure 20, and the connecting shaft 406 is positioned at the lower part of the upper end of the transmission structure 20. Referring to fig. 1, fig. 4 and fig. 7, taking the left crank 601 and the first lower limiting portion 603 as an example, the right crank 602 is similar to the second lower limiting portion 604, when the left crank 601 abuts against the first lower limiting portion 603, the left crank 601 is located at the lower rotating limiting position, at this time, the first lower limiting portion 603 is as close to the middle of the left crank 601 as possible, so that the situation that the pressure born by the first lower limiting portion 603 or the joint of the left crank 601 and the transmission structure 20 is too large due to too long force arm of the left crank 601 when being stressed is avoided, and if the strength of the material used by the left crank 601 or the transmission structure 20 is insufficient, the fracture risk is easy to occur. In addition, the end part of the first lower limiting part 603 is provided with the first elastic block 6031, so that a buffer effect can be formed when the left crank 601 is abutted against the first lower limiting part 603, the left crank 601 can be protected, a person can conveniently stand to ride, and the elastic first elastic block 6031 can play a certain role in shock absorption and buffer. Taking the coordinate origin on the transmission shaft and the X axis facing the front of the vehicle as an example, the lower limit positions of the left crank 601 and the right crank 602 may be set at an angle of 180 degrees to 240 degrees with respect to the horizontal plane, when riding, the user steps on the transmission shaft approximately in a range of about 100 degrees, for example, steps on the transmission shaft in a range of 135 degrees to 225 degrees, so that the transmission shaft can always step on the transmission shaft in the most efficient angle range, and compared with 360 degrees of circular motion, the upper and lower reset ranges a lot of idle strokes. Under the condition, the crank can be longer than that of a common bicycle, and according to the lever principle, the longer the arm of force is, the more labor is saved, while the common bicycle works by winding the crank, and the crank can not be driven to the ground, so that the length of the crank is limited. In addition, the up-and-down pedal is more suitable for riding by standing, so that the self gravity of a person is fully utilized, the riding is easier, the riding by standing is more ergonomic, and the efficiency of the pedal system is improved by more than 50% compared with that of a common bicycle by combining the three points.

Referring to fig. 7, taking the first ratchet 605 as an example, the second ratchet 606 is similar, the first ratchet 605 includes a first tooth holder 6051, a first elastic piece 6052, a first ratchet 6053 and a first tooth sleeve 6054, the second ratchet 606 includes a second tooth holder 6061, a second elastic piece 6062, a second ratchet 6063 and a second tooth sleeve 6064, the first ratchet 605 realizes unidirectional rotation of the left crank 601 through the first tooth sleeve 6054 configured inside the front end of the left crank 601 and the first tooth holder 6051 clamped at the left end of the driving shaft 201, namely, one end of the first elastic piece 6052 is abutted to the first ratchet 6053 through the first ratchet 6053 clamped on the first tooth holder 6051, and the other end is abutted to the first tooth holder 6051, so that the first ratchet 6053 is meshed with the first tooth sleeve 6054 to realize unidirectional locking. When the left crank 601 moves from top to bottom, the left crank 601 and the driving shaft 201 are in a locking state, the left crank 601 drives the driving shaft 201 to rotate, and the driving shaft 201 drives the driven shaft to realize power input; when the left crank 601 moves from bottom to top, the left crank 601 and the driving shaft 201 are in an unlocked state, the left crank 601 returns upwards without the driving shaft 201 rotating, i.e. the bottom to top movement is an idle stroke of the left crank 601. It should be noted that the number of the first elastic pieces 6052 and the first ratchet 6053 may be one, two, three, etc. as required.

In addition, a first connecting sleeve 60111 is arranged at the front end of the left crank 601, the first connecting sleeve 60111 is sleeved on the first ratchet 605, and a first limiting block is arranged on the outer wall of the first connecting sleeve 60111;

the first upper limiting part 607 comprises a first torsion spring 6071 and a first limiting claw 6072, the first limiting claw 6072 is provided with a first protruding claw end, the first limiting claw 6072 is rotatably sleeved on the driving mechanism, one end of the first torsion spring 6071 is clamped with the first limiting claw 6072, the other end of the first torsion spring 6071 is clamped on the driving mechanism, the first claw end is limited to a limiting position of the first limiting block, and the first limiting claw 6072 is rotated to enable the first claw end to be separated from the limiting position of the first limiting block;

the front end of the right crank 602 is provided with a second connecting sleeve 60221, the second connecting sleeve 60221 is sleeved on a second ratchet wheel 606, and the outer wall of the second connecting sleeve 60221 is provided with a second limiting block;

the second upper limiting part 608 comprises a second torsion spring 6081 and a second limiting claw 6082, the second limiting claw 6082 is provided with a convex second claw end, the second limiting claw 6082 is rotatably sleeved on the driving mechanism, one end of the second torsion spring 6081 is clamped with the second limiting claw 6082, the other end of the second torsion spring 6081 is clamped on the driving mechanism, the second claw end is limited to a limiting position of the second limiting block, and the second limiting claw 6082 is rotated to enable the second claw end to be separated from the limiting position of the second limiting block;

A third torsion spring is sleeved at the left end of the driving shaft 201, one end of the third torsion spring is clamped with the first connecting sleeve 60121, and the other end of the third torsion spring is clamped with the driving mechanism;

the right end of the driving shaft 201 is sleeved with a fourth torsion spring, one end of the fourth torsion spring is clamped with the second connecting sleeve 60221, and the other end of the fourth torsion spring is clamped with the driving mechanism.

Taking the left crank 601 as an example, the right crank 602 is similar, the front end of the left crank 601, that is, the end, where the left crank 601 is connected with the driving shaft 201, is a first connecting sleeve 60111, the first connecting sleeve 60111 is hollow and tubular, and is sleeved on the first ratchet 605, a tooth structure is arranged on the inner wall of the first connecting sleeve 60111, and can be matched with the first tooth sleeve 6054, the first claw end of the first limiting claw 6072 is abutted to the outer surface of the first connecting sleeve 6021, along with the upward rotation of the first connecting sleeve 60111, the first limiting block is abutted to the first claw end of the first limiting claw 6072, the first limiting claw 6072 forms limiting to the first limiting block, and referring to fig. 1 to fig. 4, one end of the first torsional spring 6071 is clamped on the first limiting claw 6072, and the other end is clamped on the outer shell of the transmission structure 20, when the first limiting claw 6072 is rotated, the first torsional spring 6071 is driven to twist to generate elastic potential energy, and after the first limiting claw 6072 is released, the first torsional spring 6071 drives the first limiting claw 6072 to restore to the original position. When the folding bicycle needs to be folded, the first limiting claw 6072 can be rotated upwards to enable the first claw end to be far away from the rotating path of the first limiting block, so that the first limiting block can not be blocked, and the left crank 601 can be rotated upwards and forwards to be folded to the side face of the left front wheel 101 in an unimpeded mode.

In order to enable the left crank 601 and the right crank 602 to automatically reset upwards after finishing the downward working process, two ends of the driving shaft 201 are respectively provided with a third torsion spring and a fourth torsion spring which are correspondingly matched with the left crank 601, and taking one side of the left crank 601 as an example, when the left crank 601 is trampled to rotate downwards, the third torsion spring is driven to rotate and twist tightly, at the moment, the third torsion spring continuously accumulates elastic potential energy, when a user converts the gravity center to apply force to the right crank 602 to trample, the left crank 601 is not stressed downwards, at the moment, the elastic potential energy of the third torsion spring is released, the left crank 601 is driven to rotate upwards to restore to the original position, and the user is convenient to trample back and forth to ride.

In one embodiment, the rear end of the left crank 601 is provided with a first connecting pipe 6011, the first connecting pipe 6011 is provided with a first interface 6011 and a second interface 60112, the axes of the first connecting pipe 6011 and the second interface 60112 are mutually perpendicular, the first interface 60111 is sleeved with the left crank 601, the second interface 60112 is connected with a left pedal 6012, and the left pedal 6012 can be folded around the rear end of the left crank 601;

the rear end of the right crank 602 is provided with a second connecting pipe 6021, the second connecting pipe 6021 is provided with a third interface 60211 and a fourth interface 60212, the axes of the third interface 60211 and the fourth interface 60212 are mutually perpendicular, the third interface 60211 is sleeved with the right crank 602, the fourth interface 60212 is connected with a right pedal 6022, and the right pedal 6022 can be folded around the rear end of the right crank 602;

The first connecting pipe 6011 further comprises a first anti-rotation opening 6013, the left crank 601 further comprises a first anti-rotation component 6013, and the first anti-rotation component 6013 passes through the first anti-rotation opening 6013 to be detachably clamped with the left crank 601 and limit the first connecting pipe 6011;

the second connecting pipe 6021 further comprises a second anti-switching port 60213, the right crank 602 further comprises a second anti-rotation component 6023, and the second anti-rotation component 6023 passes through the second anti-switching port 60213 to be detachably clamped with the right crank 602 and limit the second connecting pipe 6021.

In this embodiment, referring to fig. 7, taking the first connecting tube 6011 as an example, the second connecting tube 6021 is similar, the first connecting tube 6011 is a "T" type or "L" type connecting tube, the tube axes at the two ends of the first connecting tube 6011 are perpendicular to each other, one end of the first connecting tube 6011 is sleeved on the rear end of the left crank 601, the first connecting tube 6011 can rotate with the axis of the rear end of the left crank 601 as the axis, and similarly, the other end of the first connecting tube 6011 is connected to one end of the left pedal 6012, and the whole left pedal 6012 can rotate around the axis of the rear end of the left crank 601. When the folding bicycle is folded, the first connecting pipe 6011 is rotated upwards by 90 degrees to enable the left pedal 6012 to be attached to the left side of the left front wheel 101 in parallel; in addition, in order that the left pedal 6012 can form a support for the user's foot when in use, a mechanism for preventing the first connecting tube 6011 from rotating is further provided on the first connecting tube 6011. The first rotation preventing assembly 6013 is a component or a combination of several components having a circumferential limit structure, the first rotation preventing assembly 6013 is composed of a spring plate 60131, a first rotation preventing baffle 60132 and a screw 60133, wherein an inward protruding quadrangular bump is provided at the inner side of the first rotation preventing baffle 60132, a quadrangular groove is provided at the end face of the end of the left crank 601, the first rotation preventing baffle 60132 is fastened to the end of the left crank 601 by the quadrangular bump and the quadrangular groove and then is fastened by the screw 60133 through the first rotation preventing baffle 60132, so that the first rotation preventing baffle 60132 cannot be rotated circumferentially, and at this time, the spring plate 60131 is sandwiched between the first rotation preventing baffle 60132 and the first connecting pipe 6011 to increase the rotation friction force of the first connecting pipe 6011, that is, only when the left pedal 6012 is pulled with a great force during use, the left pedal 6012 can be rotated. The ends of the first connecting tube 6011 and the left crank 601 may also be provided with a plurality of clamping blocks, that is, the inner side wall of the first connecting tube 6011 and the outer side wall of the end of the left crank 601 are provided with mutually matched clamping blocks, so that the left pedal 6012 is limited when being folded outwards to a position parallel to the horizontal plane, and the second connecting tube 6021 is similar to the first connecting tube 6011 on one side, and the description will not be repeated.

In one embodiment, the tail assembly 50 includes: a frame 501, a suspension 502, a left wheel arm 503, a right wheel arm 504, a left rear wheel 505 and a right rear wheel 506;

the hanging frame 502 comprises a left connecting port 5021, a right connecting port 5022 and a connecting rod 5023, and the hanging frame 502 is in an inverted T shape as a whole; one end of the left wheel arm 503 is connected to the left rear wheel 505, the other end is connected to the left connection port 5021, and the left wheel arm 503 can rotate around the axis of the left connection port 5021 as a central axis; one end of the right wheel arm 504 is connected with the right rear wheel 506, the other end is connected with the right connecting port 5022, and the right wheel arm 504 can rotate by taking the axis of the right connecting port 5022 as a central shaft;

the connecting rod 5023 is movably connected with the frame 501;

the left rear wheel 505 and the right rear wheel 506 each have a use state position and a folded state position; when the left rear wheel 505 and the right rear wheel 506 are in the use state position, the left rear wheel 505 and the right rear wheel 506 are in an outer splayed shape as a whole, and when the left rear wheel 505 and the right rear wheel 506 are in the folded state position, the left rear wheel 505, the right rear wheel 506 and the frame 501 are in parallel as a whole.

In this embodiment, referring to fig. 8 and 9, the suspension bracket 502 may be an integral part, or may be welded and spliced between several parts, or may be a "V" shaped part, or may be a "T" shaped part, and after the connecting rod 5023 is connected to the frame 501 through the rotating shaft, the connecting rod 5023 has the function of guiding the left rear wheel 505 and the right rear wheel 506 to turn, and it is worth mentioning that the left end and the right end of the suspension bracket 502 are slightly inclined upwards, while the end of the corresponding left wheel arm 503 connected to the left rear wheel 505 is slightly inclined downwards, and is connected to the left end of the suspension bracket 502, and the specific structure of the right wheel arm 504 is similar to that of the left wheel arm 503. After connection, when the left rear wheel 505 and the right rear wheel 506 are both in the use state position, the left rear wheel 505 and the right rear wheel 506 are in an outer splayed shape as a whole, and at this time, the left rear wheel 505 and the right rear wheel 506 are both below the suspension bracket 502. When the left rear wheel 505 and the right rear wheel 506 are in the folded state position, the left rear wheel 505 and the left front wheel 101 and the right rear wheel 506 and the right front wheel 101 are integrally parallel, and at this time, the left rear wheel 505 and the right rear wheel 506 are in front of the suspension frame 502. The above-described use state position and folded state position refer to two different fixed positions of the left rear wheel 505 and the right rear wheel 506. Because the two wheels are in a parallel state after being folded, the folding bicycle is more compact than the whole structure before being folded, the occupied space is reduced, and the folding bicycle can be used as a supporting wheel; in addition, a first fork 5031 is arranged at one end of the left wheel arm 503 connected with the left rear wheel 505, and the left rear wheel 505 is connected to the first fork 5031 through a wheel shaft matched screw; the end of the right wheel arm 504 connected with the right rear wheel 506 is provided with a second wheel fork 5041, and the right rear wheel 506 is connected to the second wheel fork 5041 through a wheel shaft matching screw.

Referring to fig. 8, a first joint 5032 is provided at one end of the left wheel arm 503 connected to the left connection port 5021, the first joint 5032 is connected to the left connection port 5021 through a first positioning member 5033, and the first positioning member 5033 has a first clamping position and a second clamping position at the outer end thereof; one end of the right wheel arm 504, which is connected with the right connecting port 5022, is provided with a second joint 5042, the second joint 5042 is connected with the right connecting port 5022 through a second locating piece 5043, and the outer end of the second locating piece 5043 is provided with a third clamping position and a fourth clamping position;

when the left wheel and the right wheel are both in the use state position, the first connector 5032 and the left connection port 5021 are clamped at the first clamping position, and the second connector 5042 and the right connection port 5022 are clamped at the third clamping position; when the left wheel and the right wheel are in the folded state position, the first connector 5032 and the left connection port 5021 are clamped at the second clamping position, and the second connector 5042 and the right connection port 5022 are clamped at the fourth clamping position.

The first positioning member 5033 includes: the cover plate of the first limiting cover 50331 is provided with a first limiting bump 503311 and an inner hollow first connecting shaft 503312 inside; the second positioning member 5043 includes: the inner side of the cover plate of the second limiting cover 50431 is provided with a second limiting bump and an inner hollow second connecting shaft 504312; wherein, the liquid crystal display device comprises a liquid crystal display device,

The first fixing shaft 50334 is connected with the left connecting port 5021, the first connector 5032 is sleeved on the first fixing shaft 50334, the first clamping position is a first notch on the outer end of the first connector 5032, the second clamping position is a second notch on the outer end of the first connector 5032, the first connecting shaft 503312 is inserted into the first fixing shaft 50334 and is clamped with the circumference of the first fixing shaft 50334, a first screw 50333 penetrates through the bottom of the first connecting shaft 503312 to be connected with the first fixing shaft 50334, one end of the first spring 50332 is abutted with the bottom of the first connecting shaft 503312, and the other end of the first spring 50332 is abutted with a nut of the first screw 50333;

the second fixing shaft 50434 is connected with the right connecting port 5022, the second connector 5042 is sleeved on the second fixing shaft 50434, the third clamping position is a third notch on the outer end of the first connector 5032, the fourth clamping position is a fourth notch on the outer end of the second connector 5042, the second connecting shaft 504312 is inserted into the second fixing shaft 50434 and is clamped with the second fixing shaft in the circumferential direction, a second screw 50433 penetrates through the bottom of the second connecting shaft 504312 to be connected with the second fixing shaft 50434, one end of the second spring 50432 is abutted with the bottom of the second connecting shaft 504312, and the other end of the second spring 50432 is abutted with a nut of the second screw 50433;

when the left wheel and the right wheel are both in the use state, the first limit bump 503311 is clamped with the first notch, and the second limit bump is clamped with the third notch; when the left wheel and the right wheel are in the folded state, the first limiting lug 503311 is clamped with the third notch, and the second limiting lug is clamped with the fourth notch.

The first positioning member 5033 further includes: at least one first positioner bearing 50335; the second positioning member 5043 further includes: at least one second retainer bearing 50435;

the first positioning piece bearing 50335 is clamped on the first fixed shaft 50334, the first connector 5032 is movably connected with the first positioning piece bearing 50335, the second positioning piece bearing 50435 is clamped on the second fixed shaft 50434, and the second connector 5042 is movably connected with the second positioning piece bearing 50435.

In one embodiment, the head assembly 30 includes: a headstock tube 301, a V-shaped joint 302, a left handle 303 and a right handle 304; wherein, the liquid crystal display device comprises a liquid crystal display device,

the V-shaped joint 302 is connected to the top end of the head pipe 301, and the V-shaped joint 302 has a first connection port 3021 and a second connection port 3022 which are inclined downward;

the left handle 303 is movably connected to the first connection port 3021, and the left handle 303 can rotate around the first connection port 3021 with the axis of the first connection port 3021 as a central axis; the right handle 304 is movably connected to the second connection port 3022, and the right handle 304 can rotate around the second connection port 3022 with the axis of the second connection port 3022 as the central axis;

the left handle 303 and the right handle 304 each have a use state position and a folded state position; when the left handle 303 and the right handle 304 are in the use state positions, the left handle 303, the right handle 304 and the head tube 301 are in a Y shape as a whole, and when the left handle 303 and the right handle 304 are in the folded state positions, the left handle 303 and the right handle 304 are parallel to the head tube 301 as a whole.

In this embodiment, a third joint 3031 is provided at one end of the left handle 303, and a fourth joint 3041 is provided at one end of the right handle 304; the left handle 303 further includes: a first stop collar 3032 and a first stop screw 3033; the right handle 304 further includes: a second limit ring 3042 and a second limit screw 3043; wherein, the liquid crystal display device comprises a liquid crystal display device,

a pair of first openings 30311 passing from one side through the opposite side are provided on the side wall of the third joint 3031, and a pair of second openings 3041 passing from one side through the opposite side are provided on the side wall of the fourth joint 3041; a pair of first limiting notches 30211 and a pair of second limiting notches 30212 are arranged on the side wall of the first connecting port 3021, and a pair of third limiting notches 30221 and a pair of fourth limiting notches 30222 are arranged on the side wall of the second connecting port 3022;

the first limiting screw 3033 penetrates from one side of the first limiting ring 3032, passes through the first opening 30311 and is fixed on the other side of the first limiting ring 3032, the first limiting ring 3032 is sleeved on the third joint 3031, the second limiting screw 3043 penetrates from one side of the second limiting ring 3042, passes through the second opening 3041 and is fixed on the other side of the second limiting ring 3042, and the second limiting ring 3042 is sleeved on the fourth joint 3041;

when the left handle 303 and the right handle 304 are both in the use state positions, the first opening 30311 corresponds to the first limiting notch 30211, the first limiting ring 3032 is clamped at the outer side of the first connecting port 3021, and the first limiting screw 3033 is clamped on the first limiting notch 30211; the second opening 3041 corresponds to the third limiting notch 30221, the second limiting ring 3042 is clamped at the outer side of the second connecting port 3022, and the second limiting screw 3043 is clamped on the third limiting notch 30221; when the left handle 303 and the right handle 304 are both in the folded state position, the first opening 30311 corresponds to the second limiting notch 30212, the first limiting ring 3032 is clamped at the outer side of the first connection port 3021, and the first limiting screw 3033 is clamped on the second limiting notch 30212; the second opening 3041 corresponds to the fourth limiting notch 30222, the second limiting ring 3042 is clamped to the outer side of the second connecting port 3022, and the second limiting screw 3043 is clamped to the fourth limiting notch 30222.

Taking the left handle 303 as an example, the following description will be given: the first opening 30311 is a pair of openings using the axis of the third joint 3031 as a symmetry axis, the first limit screw 3033 can slide left and right in the first opening 30311, which corresponds to the first opening 30311 forming the chute of the first limit screw 3033, and the first limit screw 3033 can be moved left and right in the first opening 30311 by an external force, for example, by pulling the first limit screw 3033 by a user by hand, so that the first limit screw 3033 can slide left and right in the first opening 30311. When the left handle 303 needs to be fixed in the use state position, only the third connector 3031 of the left handle 303 needs to be inserted into the first connector 3021 in the use state position, at this time, the side, close to the first limiting notch 30211, of the first opening 30311 is aligned with the first limiting notch 30211, and then the first limiting screw 3033 is pulled onto the first limiting notch 30211 to be clamped, so that the left handle 303 is fixed. It should be noted that, the first stop screw 3033 may be connected to the first stop notch 30211 by an interference fit, and may further be connected in an auxiliary manner by a spring as described in the following embodiments. When the left handle 303 is detached, the left handle 303 can be rotated and stored only by pulling the first limit screw 3033 out of the first limit notch 30211. The left handle 303 is fixed in the folded state position in a similar manner to the above principle, and will not be described again. Similarly, the principle of fixing and removing the right handle 304 in the use state position and the folded state position is similar to that of the left handle 303, and will not be described again. In addition, the first limiting notch 30211 and the second limiting notch 30212 may be disposed adjacent to each other, that is, the second limiting notch 30212 is located beside the first limiting notch 30211, as shown in fig. 12, in this case, the position of the left handle 303 in use is slightly inclined to the front of the vehicle head, the user extends the user to operate the handle bar forward, the whole vehicle body may be made smaller, and the inclination effect may be as shown in fig. 5.

In one embodiment, left handle 303 further comprises: a third spring 3034; the right handle 304 further includes: a fourth spring 3044; wherein, the liquid crystal display device comprises a liquid crystal display device,

a first limit hook 30312 is arranged in the third joint 3031, one end of the third spring 3034 is connected with the first limit hook 30312, and the other end is connected with a first limit screw 3033;

the fourth joint 3041 is internally provided with a second limiting hook 30112, one end of the fourth spring 3044 is connected with the second limiting hook 30112, and the other end is connected with a second limiting screw 3043.

In the present embodiment, the left handle 303 is taken as an example, and the right handle 304 is symmetrical to the left handle 303 in structure, and so on. The third connector 3031 is a tubular connector, and the inside of the third connector can accommodate a brake cable to pass through. The first spacing hook 30312 is disposed inside the third joint 3031 and near the opening of the third joint 3031, and the first opening 30311 is disposed at a position of the third joint 3031 more inward than the first spacing hook 30312, so that when one end of the third spring 3034 is connected to the first spacing hook 30312 and the other end is connected to the first spacing screw 3033, the third spring 3034 is in a stretched state, and can always generate an elastic force to pull the first spacing screw 3033 toward the first spacing hook 30312. Because the third connector 3031 is inserted into the first connector 3021 to connect, when the third connector is connected, the first limiting hook 30312 is located inside the first limiting gap 30211, that is, a pull force is always generated to clamp the first limiting screw 3033 on the first limiting gap 30211, so as to prevent the first limiting screw 3033 from being separated from the first limiting gap 30211. The first limiting screw 3033 is connected to the second limiting notch 30212 in a similar manner as described above, and will not be described again.

It is apparent that the embodiments described above are only some embodiments of the present application, but not all embodiments, the preferred embodiments of the present application are given in the drawings, but not limiting the patent scope of the present application. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a more thorough understanding of the present disclosure. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof. All equivalent structures made by the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the protection scope of the application.

Claims

1. A folding bicycle is characterized by comprising two front wheels, a transmission structure, a bicycle head assembly, a shock absorbing assembly, a bicycle tail assembly provided with rear wheels and a driving assembly;

2. The folding bicycle of claim 1, wherein the shock assembly comprises a shock absorber, a shock absorber bracket, a first shock link and a second shock link;

3. The folding bicycle of claim 2, wherein the shock mount comprises a shock left mount and a shock right mount, the first shock link comprises a first left shock link and a first right shock link, and the second shock link comprises a second left shock link and a second right shock link;

4. The folding bicycle according to claim 3, wherein the front end of the tail assembly is provided with a U-shaped opening and a connecting hole, and the shock absorbing assembly is respectively provided with a quick release switch detachably connected with the U-shaped opening and a connecting shaft movably connected with the connecting hole;

5. The folding bicycle of claim 4, wherein the quick release switch further comprises a locking lever and a return spring;

6. The folding bicycle of claim 1, wherein the drive assembly includes a left crank, a right crank, a first lower limit and a second lower limit;

7. The folding bicycle of claim 6, wherein the drive assembly further comprises a first upper limit and a second upper limit; the first upper limiting part is arranged on the left side surface of the transmission structure and close to the left end position of the driving shaft and is used for limiting the upper rotation limit of the left crank;

8. The folding bicycle of claim 6, wherein the rear end of the left crank is provided with a first connecting pipe, the first connecting pipe is provided with a first interface and a second interface, the axes of the first interface and the second interface are mutually perpendicular, the first interface is sleeved with the left crank, the second interface is connected with a left pedal, and the left pedal can be folded around the rear end of the left crank;

9. The folding bicycle of claim 1, wherein the tail assembly comprises: the device comprises a frame, a suspension bracket, a left wheel arm, a right wheel arm, a left rear wheel and a right rear wheel;

The connecting rod is movably connected with the frame;

10. The folding bicycle of claim 1, wherein the head assembly comprises: the vehicle head pipe, the V-shaped connector, the left handle and the right handle; wherein, the liquid crystal display device comprises a liquid crystal display device,