A folding bicycle

Abstract

The present application relates to the technical field of bicycle, in particular to a folding bicycle, which comprises two front wheels, a transmission structure, a head assembly, a shock-absorbing assembly, a tail assembly provided with a rear wheel and a driving assembly; the transmission structure is provided with a driving shaft at one end and a driven shaft at the other end, and the two front wheels are connected to the driven shaft to form a front wheel assembly with the transmission structure part located between the two front wheels and a gap between the two front wheels; the driving assembly is foldably connected to the driving shaft and can be folded to the side of the front wheel; the shell of the transmission structure is movably connected to the shock-absorbing assembly, and the tail assembly is foldably connected to the shock-absorbing assembly, which can be folded to between the two front wheels around the connecting end, and the rear wheel can be folded to be parallel to the two front wheels; the head assembly is foldably connected to the shock-absorbing assembly, which can be folded to be close to the front wheel around the connecting end. The folding bicycle has a small volume after folding, and is easy to store and carry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shock absorbers, in particular to a folding bicycle. BACKGROUND

[0002] The folding bicycle belongs to a category of bicycles, and generally can reduce the length of the bicycle by about 45% after folding, and the whole vehicle can be placed in a special folding bag or the trunk of a car after folding. Meanwhile, no external tools are needed during folding, and the bicycle can be folded and unfolded manually.

[0003] The folding bicycles on the market are mainly folded by folding the frame folding joint and the stand pipe folding joint of the folding bicycle, and the front and rear wheels are folded together. However, the folded bicycle is still large in size and occupies a large space, and is still not easy to store and carry, resulting in poor user experience. SUMMARY

[0004] The purpose of the present application is to provide a folding bicycle, which has a folding structure that the whole vehicle is folded into a vehicle head assembly, a vehicle body assembly and a vehicle tail assembly in sequence around the outer periphery of a front wheel assembly, and a driving assembly around the side of the front wheel assembly, and is small in size after folding, easy to store and carry.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A folding bicycle comprises two front wheels, a transmission structure, a vehicle head assembly, a shock absorbing assembly, a vehicle tail assembly provided with a rear wheel and a driving assembly.

[0007] One end of the transmission structure is provided with a driving shaft, and the other end is provided with a driven shaft. The two front wheels are connected to the driven shaft, forming a front wheel assembly in which the two front wheels are arranged at intervals and the transmission structure is partially located between the two front wheels. The driving assembly is foldably connected to the driving shaft and can be folded to the side of the front wheel assembly.

[0008] The outer shell of the transmission structure is movably connected to the shock absorbing assembly, and the vehicle tail assembly is foldably connected to the shock absorbing assembly. The vehicle tail assembly can be folded around its connecting end between the two front wheels, and the rear wheel can be folded to be parallel to the two front wheels. The vehicle head assembly is foldably connected to the shock absorbing assembly, and the vehicle head assembly can be folded around its connecting end to be close to the front wheel.

[0009] Further, the shock absorbing assembly comprises a shock absorber, a shock absorber bracket, a first shock absorbing connecting rod and a second shock absorbing connecting rod.

[0010] The shock absorber is arranged in a shock absorber support, the shock absorber has a movable end, and the top of the movable end is provided with a first shaft hole, the first shock absorber connecting rod is movably connected to the shock absorber support through a bearing, one end of the first shock absorber connecting rod is movably connected to the first shaft hole, and the other end of the first shock absorber connecting rod is movably connected to the transmission structure through a bearing;

[0011] One end of the second shock absorber connecting rod is movably connected to the shock absorber support through a bearing, and the other end of the second shock absorber connecting rod is movably connected to the transmission structure through a bearing.

[0012] 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;

[0013] The shock absorber left support and the shock absorber right support are symmetrically arranged, the shock absorber is located between the shock absorber left support and the shock absorber right support, one end of the first left shock absorber connecting rod is movably connected to the shock absorber left support through a bearing, the other end of the first left shock absorber connecting rod is movably connected to the first shaft hole, and the other end of the first left shock absorber connecting rod is movably connected to the transmission structure through a bearing, one end of the first right shock absorber connecting rod is movably connected to the shock absorber right support through a bearing, the other end of the first right shock absorber connecting rod is movably connected to the first shaft hole, and the other end of the first right shock absorber connecting rod is movably connected to the transmission structure through a bearing;

[0014] The bottom end of the shock absorber is provided with a second shaft hole, and the connecting shaft is movably connected in sequence through the other end of the shock absorber left support, the second shaft hole and the other end of the shock absorber right support;

[0015] One end of the second left shock absorber connecting rod is movably connected to the shock absorber left support through a bearing, and the other end of the second left shock absorber connecting rod is movably connected to the transmission structure through a bearing;

[0016] One end of the second right shock absorber connecting rod is movably connected to the shock absorber right support through a bearing, and the other end of the second right shock absorber connecting rod is movably connected to the transmission structure through a bearing.

[0017] Further, the front end of the tail assembly is provided with a U-shaped opening and a connecting hole, the shock absorber assembly is respectively provided with a quick release switch which is detachably connected with the U-shaped opening and the connecting shaft which is movably connected with the connecting hole;

[0018] The two sides of the U-shaped opening are respectively provided with limiting protrusions, the quick release switch comprises a screw rod, the two ends of the screw rod are respectively provided with limiting nuts, and the inner sides of the limiting nuts are provided with inner grooves matched with the limiting protrusions;

[0019] The quick release switch has two states of opening and closing, and when in the closed state, the inner groove is clamped with the limiting protrusion, so that the quick release switch is limited in the U-shaped opening; when in the open state, the inner groove is separated from the limiting protrusion, so that the screw rod is separated from the U-shaped opening, and the frame can rotate around the connecting shaft.

[0020] Further, the quick release switch further comprises a locking rod and a return spring.

[0021] The locking rod is arranged at one end of the screw rod; both the return springs are sleeved on the screw rod, and one end of one of the return springs abuts against the left support of the shock absorber, and the other end abuts against the left limiting nut, and one end of the other return spring abuts against the right support of the shock absorber, and the other end abuts against the right limiting nut.

[0022] Further, the driving assembly comprises a left crank, a right crank, a first lower limiting portion and a second lower limiting portion.

[0023] The left crank is connected with the left end of the driving shaft through the first ratchet, and the right crank is connected with the right end of the driving shaft through the second ratchet.

[0024] The first lower limiting portion is arranged at a first position between the transmission structure and the left crank, and is used for limiting the lower limit position of the rotation of the left crank; and the second lower limiting portion is arranged at a second position between the transmission structure and the right crank, and is used for limiting the lower limit position of the rotation of the right crank.

[0025] Further, the driving assembly further comprises a first upper limiting portion and a second upper limiting portion; the first upper limiting portion is arranged at a left side of the transmission structure and close to the left end of the driving shaft, and is used for limiting the upper limit position of the rotation of the left crank.

[0026] The second upper limiting portion is arranged at a right side of the transmission structure and close to the right end of the driving shaft, and is used for limiting the upper limit position of the rotation of the right crank.

[0027] Further, the rear end of the left crank is provided with a first connecting pipe, the first connecting pipe has a first interface and a second interface with axes perpendicular to each other, the first interface is sleeved with the left crank, and the second interface is connected with a left pedal, and the left pedal can be folded around the rear end of the left crank.

[0028] The rear end of the right crank is provided with a second connecting pipe, the second connecting pipe has a third interface and a fourth interface with axes perpendicular to each other, the third interface is sleeved with the right crank, and the fourth interface is connected with a right pedal, and the right pedal can be folded around the rear end of the right crank.

[0029] The first connecting pipe further comprises a first anti-rotation interface, and the left crank further comprises a first anti-rotation assembly which is detachably connected with the left crank through the first anti-rotation interface and limits the first connecting pipe;

[0030] The second connecting pipe further comprises a second anti-rotation interface, and the right crank further comprises a second anti-rotation assembly which is detachably connected with the right crank through the second anti-rotation interface and limits the second connecting pipe.

[0031] Further, the tail assembly comprises a frame, a suspension frame, a left wheel arm, a right wheel arm, a left rear wheel and a right rear wheel;

[0032] The suspension frame comprises a left connecting port, a right connecting port and a connecting rod, and the suspension frame as a whole is in the shape of an inverted "T"; one end of the left wheel arm is connected with the left rear wheel, and the other end of the left wheel arm is connected with the left connecting port, and the left wheel arm can rotate with the axis of the left connecting port as a central axis; one end of the right wheel arm is connected with the right rear wheel, and the other end of the right wheel arm is connected with the right connecting port, and the right wheel arm can rotate with the axis of the right connecting port as a central axis;

[0033] The connecting rod is movably connected with the frame;

[0034] The left rear wheel and the right rear wheel each have a use state position and a folding state position; when the left rear wheel and the right rear wheel are both in the use state position, the left rear wheel and the right rear wheel as a whole are in the shape of an outer "8" character; when the left rear wheel and the right rear wheel are both in the folding state position, the left rear wheel, the right rear wheel and the frame as a whole are parallel.

[0035] Further, the head assembly comprises a head pipe, a V-shaped joint, a left handle and a right handle; wherein,

[0036] The V-shaped joint is connected at the top end of the head pipe, and the V-shaped joint has a first connecting port and a second connecting port which are obliquely downward;

[0037] The left handle is movably connected with the first connecting port, and the left handle can rotate around the first connecting port with the axis of the first connecting port as a central axis; the right handle is movably connected with the second connecting port, and the right handle can rotate around the second connecting port with the axis of the second connecting port as a central axis;

[0038] The left handle and the right handle each have a use state position and a folding state position; when the left handle and the right handle are both in the use state position, the left handle, the right handle and the head pipe as a whole are in the shape of "Y"; when the left handle and the right handle are both in the folding state position, the left handle and the right handle as a whole are parallel to the head pipe.

[0039] Compared with the prior art, the present application has the following advantages:

[0040] The shock-absorbing assembly connected between the transmission structure and the frame can reduce the impact of the road surface on the bicycle during running and improve comfort; when folding, the front assembly is folded forward around the connection end thereof to the front side of the front wheel assembly, the rear assembly is folded around the connection end thereof to the rear side of the front wheel assembly and partially clamped between the double wheels of the front wheel assembly, and the driving assembly is folded to the side of the front wheel assembly, so that the whole vehicle forms a folding structure in which the front assembly, the body assembly and the rear assembly are sequentially arranged around the outer periphery of the front wheel assembly and the driving assembly is arranged to the side of the front wheel assembly. After folding, the whole vehicle is only slightly larger than the wheels of the front wheel assembly, for example, when the wheels of the front wheel assembly are 9 inches, the whole vehicle is only slightly larger than an A4 paper after folding, and can be put into a backpack, which is very convenient for storage and carrying. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0042] In the drawings:

[0043] Figure 1 It is an exploded view of the structure of the folding bicycle in the embodiment;

[0044] Figure 2 It is an enlarged view of A in the drawing; Figure 1

[0045] Figure 3 It is an enlarged view of B in the drawing; Figure 1

[0046] Figure 4 It is a schematic view of the folding structure of the folding bicycle in the embodiment;

[0047] Figure 5 It is an effect view of the folding bicycle in the embodiment;

[0048] Figure 6 It is an exploded view of the shock-absorbing assembly in the embodiment;

[0049] Figure 7 It is an exploded view of the driving structure in the embodiment;

[0050] Figure 8 It is an exploded view of the rear assembly in the embodiment;

[0051] Figure 9 ​​Structure exploded view of the tail assembly in another embodiment;

[0052] Figure 10 Structure exploded view of the head assembly in an embodiment;

[0053] Figure 11 Structure exploded view of the handlebar in an embodiment;

[0054] Figure 12 Structure schematic view of the V-joint in an embodiment.

[0055] In the figure:

[0056] 10, front wheel assembly; 101, front wheel;

[0057] 20, transmission structure; 201, drive shaft;

[0058] 30, head assembly; 301, head tube; 302, V-joint; 3021, first connecting port; 30211, first limiting notch; 30212, second limiting notch; 3022, second connecting port; 30221, third limiting notch; 30222, fourth limiting notch; 303, left handlebar; 3031, third joint; 30311, first opening; 30312, first limiting hook; 3032, first limiting ring; 3033, first limiting screw; 3034, third spring; 304, right handlebar; 3041, fourth joint; 30411, second opening; 30412, second limiting hook; 3042, second limiting ring; 3043, second limiting screw; 3044, fourth spring;

[0059] 40, shock assembly; 401, shock absorber; 4011, first shaft hole; 4012, second shaft hole; 402, shock absorber support; 4021, left shock absorber support; 4022, right shock absorber support; 403, first shock absorber connecting rod; 4031, first left shock absorber connecting rod; 4032, first right shock absorber connecting rod; 404, second shock absorber connecting rod; 4041, second left shock absorber connecting rod; 4042, second right shock absorber connecting rod; 405, quick release switch; 4051, screw rod; 4052, limiting nut; 40521, inner groove; 4053, locking rod; 4054, return spring; 406, connecting shaft;

[0060] 50, tail assembly; 501, frame; 5011, U-shaped opening; 50111, limiting protrusion; 5012, connecting hole; 502, suspension frame; 5021, left connecting port; 5022, right connecting port; 5023, connecting rod; 503, left wheel arm; 5031, first fork; 5032, first joint; 5033, first positioning member; 50331, first limiting cover; 503311, first limiting protrusion; 503312, first connecting shaft; 50332, first spring; 50333, first screw; 50334, first fixed shaft; 50335, first positioning member bearing; 504, right wheel arm; 5041, second fork; 5042, second joint; 5043, second positioning member; 50431, second limiting cover; 504312, second connecting shaft; 50432, second spring; 50433, second screw; 50434, second fixed shaft; 50435, second positioning member bearing; 505, left rear wheel; 506, right rear wheel;

[0061] 60, drive assembly; 601, left crank; 6011, first connecting pipe; 60111, first interface; 60112, second interface; 60113, first anti-rotation interface; 6012, left pedal; 60121, first connecting sleeve; 6013, first anti-rotation assembly; 60131, elastic sheet; 60132, first anti-rotation stopper; 60133, screw; 602, right crank; 6021, second connecting pipe; 60211, third interface; 60212, fourth interface; 60213, second anti-rotation interface; 6022, right pedal; 60221, second connecting sleeve; 6023, second anti-rotation assembly; 603, first lower limiting portion; 6031, first elastic block; 604, second lower limiting portion; 6041, second elastic block; 605, first ratchet wheel; 6051, first tooth seat; 6052, first elastic sheet; 6053, first ratchet tooth; 6054, first tooth sleeve; 606, second ratchet wheel; 6061, second tooth seat; 6062, second elastic sheet; 6063, second ratchet tooth; 6064, second tooth sleeve; 607, first upper limiting portion; 6071, first torsional spring; 6072, first limiting claw; 608, second upper limiting portion; 6081, second torsional spring; 6082, second limiting claw;

[0062] 70, bearing; 701, first inlay; 702, second inlay. DETAILED DESCRIPTION

[0063] Unless otherwise defined, 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 herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise" and "comprising", "have" and "having", "include" and "including" and "contain" and "containing" shall not be construed as indicating an exclusive inclusion, but rather an open scope.

[0064] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0065] For those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings.

[0066] As shown in Figures 1-12 The present application provides a folding bicycle, which comprises two front wheels 101, a transmission structure 20, a head assembly 30, a shock-absorbing assembly 40, a tail assembly 50 provided with a rear wheel, and a driving assembly 60.

[0067] The transmission structure 20 is provided at one end with a driving shaft 201 and at the other end with a driven shaft, and the two front wheels 101 are connected to the driven shaft, forming a front wheel assembly 10 in which the two front wheels 101 are arranged at intervals and the transmission structure 20 is partially located between the two front wheels 101; the driving assembly 60 is foldably connected to the driving shaft 201 and can be folded to the side of the front wheel assembly 10.

[0068] The outer shell of the transmission structure 20 is movably connected to the shock-absorbing assembly 40, the tail assembly 50 is foldably connected to the shock-absorbing assembly 40, and the tail assembly 50 can be folded around its connecting end to between the two front wheels 101, and the rear wheel can be folded to be parallel to the two front wheels 101; the head assembly 30 is foldably connected to the shock-absorbing assembly 40, and the head assembly 30 can be folded around its connecting end to be in close contact with the front wheels 101.

[0069] In this embodiment, the transmission structure 20 includes a drive shaft 201 and a driven shaft. The drive shaft 201 transmits power to the driven shaft through the internal structure 20, thereby enabling the driven shaft to drive the front wheel 101. The transmission structure 20 is movably connected to the shock absorber assembly 40. When the front wheel 101 vibrates, the shock absorber assembly 40 can buffer the vibration, improving the riding comfort of the bicycle. The aforementioned drive assembly 60 refers to the left crank 601 and the right crank 602. Unlike the cranks used for conventional circular riding, the cranks of this invention are used for pedaling up and down. When folded, the left crank 601 folds to the left side of the left front wheel 101, and the right crank 602 folds to the right side of the right front wheel 101, meaning the drive assembly 60 folds to the side of the front wheel assembly 10. The aforementioned head assembly 30 refers to the bicycle handlebars, and the connection between the handlebars and the head tube 301. The head tube 301 is extendable, such as... Figure 5 As shown, the handlebars can be configured to be parallel to the head tube 301 when folded; or they can be configured to be perpendicular to the head tube 301 when folded. The former, when folded, can fit snugly against the front wheel 101, while the latter, when folded, forms an L-shape with the head tube 301 and handlebars, fitting snugly against and surrounding the front wheel 101. The aforementioned rear assembly 50 includes a frame 501 and a rear wheel. The frame 501 can be a crossbeam, and the rear wheel is connected to the end of the crossbeam. When folded, the frame 501 is inserted between the two front wheels 101, and the rear wheel folds to the side of the front wheels 101 and is parallel to them. In summary, the folding bicycle proposed in this invention folds in the following ways: the front assembly 30 folds around its connecting end to the front of the front wheel assembly 10; the rear assembly 50 folds around its connecting end to the rear of the front wheel assembly 10 and partially engages between the two wheels of the front wheel assembly 10; and the drive assembly 60 folds to the side of the front wheel assembly 10. This results in a folding structure in which the front assembly 30, the body assembly, and the rear assembly 50 are arranged around the front wheel assembly 10 in sequence, and the drive assembly 60 is arranged around the side of the front wheel assembly 10. This structure has the advantages of occupying little space after folding and being easy to carry and store.

[0070] In one embodiment, the shock absorption assembly 40 includes a shock absorber 401, a shock absorber bracket 402, a first shock absorption link 403, and a second shock absorption link 404.

[0071] The shock absorber 401 is installed inside the shock absorber bracket 402. The shock absorber 401 has a movable end, and the top of the movable end is provided with a first shaft hole 4011. The first shock absorber connecting rod 403 is movably connected to the shock absorber bracket 402 through the bearing 70. One end of the first shock absorber connecting rod 403 is movably connected to the first shaft hole 4011, and the other end is movably connected to the transmission structure 20 through the bearing 70.

[0072] One end of the second shock absorber link 404 is movably connected to the shock absorber bracket 402 via a bearing 70, and the other end is movably connected to the transmission structure 20 via a bearing 70.

[0073] In the embodiment, the shock absorber 401 is mounted inside the shock absorber bracket 402, the movable end of the shock absorber 401 is provided with a first shaft hole 4011, a first shock absorber connecting rod 403 is movably connected to the shock absorber bracket 402 through a bearing 70, one end of the first shock absorber connecting rod 403 is movably connected to the first shaft hole 4011, and the other end of the first shock absorber 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 absorption structure through the shock absorber bracket 402, the first shock absorber connecting rod 403 and the movable end of the shock absorber 401, buffer the vibration on the transmission structure 20, and improve the comfort of riding. The bearing 70 includes a first bushing 701 and a second bushing 702, as shown in Figure 6 , the second bushing 702 is sleeved in the first bushing 701, and the first bushing 701 and the second bushing 702 can slide relative to each other, reducing the wear of the first shock absorber connecting rod 403 during the shock absorption process, and facilitating the maintenance of the shock absorption effect by regularly replacing the first bushing 701 or the second bushing 702. One end of a second shock absorber connecting rod 404 is movably connected to the shock absorber bracket 402 through a bearing 70, and the other end of the second shock absorber connecting rod 404 is movably connected to the transmission structure 20 through the bearing 70, as shown in Figure 4 and Figure 6 , that is, the transmission structure 20 is connected to form a shock absorption structure composed of the first shock absorber connecting rod 403 and the second shock absorber connecting rod 404 with the shock absorber bracket 402, the first shock absorber connecting rod 403, the second shock absorber connecting rod 404 and the shock absorber 401, further strengthening the shock absorption effect of the whole vehicle.

[0074] In one embodiment, the shock absorber bracket 402 includes a shock absorber left bracket 4021 and a shock absorber right bracket 4022, the first shock absorber connecting rod 403 includes a first left shock absorber connecting rod 4031 and a first right shock absorber connecting rod 4032, and the second shock absorber connecting rod 404 includes a second left shock absorber connecting rod 4041 and a second right shock absorber connecting rod 4042;

[0075] The shock absorber left bracket 4021 and the shock absorber right bracket 4022 are symmetrically arranged, and the shock absorber 401 is located between the shock absorber left bracket 4021 and the shock absorber right bracket 4022; the first left shock absorber connecting rod 4031 is movably connected to the shock absorber left bracket 4021 through a bearing 70, one end of the first left shock absorber connecting rod 4031 is movably connected to the first shaft hole 4011, and the other end of the first left shock absorber connecting rod 4031 is movably connected to the transmission structure 20 through the bearing 70; the first right shock absorber connecting rod 4032 is movably connected to the shock absorber right bracket 4022 through a bearing 70, one end of the first right shock absorber connecting rod 4032 is movably connected to the first shaft hole 4011, and the other end of the first right shock absorber connecting rod 4032 is movably connected to the transmission structure 20 through the bearing 70;

[0076] The bottom end of the shock absorber 401 is provided with a second shaft hole 4012, and is movably connected through a connecting shaft 406 in sequence through the other end of the shock absorber left support 4021, the second shaft hole 4012 and the other end of the shock absorber right support 4022;

[0077] The other end of the second left shock absorbing connecting rod 4041 is connected to the transmission structure 20 through a bearing 70.

[0078] The other end of the second right shock absorbing connecting rod 4042 is connected to the transmission structure 20 through a bearing 70.

[0079] In the embodiment, the shock absorber support 402 includes a shock absorber left support 4021 and a shock absorber right support 4022, the first shock absorbing connecting rod 403 includes a first left shock absorbing connecting rod 4031 and a first right shock absorbing connecting rod 4032, and the shock absorber left support 4021 and the shock absorber right support 4022 are symmetrically arranged, and the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 are symmetrically arranged. One end of the shock absorber left support 4021 and one end of the shock absorber right support 4022 are connected to the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 at symmetric positions through a bearing 70. Referring to Figure 1 and Figure 6 That is, one end of the shock absorber left support 4021 is connected to the middle position of the first left shock absorbing connecting rod 4031 through a bearing 70, and symmetrically, one end of the shock absorber right support 4022 is connected to the middle position of the first right shock absorbing connecting rod 4032 through a bearing 70. The first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032 are respectively connected to the shock absorber 401 and the transmission structure 20 on both sides, so that the shock absorber 401 and the transmission structure 20 can be similar to a seesaw at the middle positions of the first left shock absorbing connecting rod 4031 and the first right shock absorbing connecting rod 4032, and can be moved up and down between the two ends, so that the vibration of the whole vehicle is properly buffered by the shock absorber 401. More specifically, the bottom end of the shock absorber 401 is provided with a second shaft hole 4012, and is movably connected through a connecting shaft 406 in sequence through the other end of the shock absorber left support 4021, the second shaft hole 4012 and the other end of the shock absorber right support 4022, Referring to Figure 1 , Figure 4 and Figure 6The connecting shaft 406 is movably connected with the shock absorber left support 4021, the shock absorber right support 4022, the shock absorber 401 and the frame 501 through the second shaft hole 4012 and the connecting hole 5012 on the shock absorber 401, and the frame 501, the shock absorbing assembly 40 and the transmission structure 20 are connected. 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 support 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 support 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 a bearing 70, so as to form a double-arm support structure of the second left shock absorbing connecting rod 4041 and the second right shock absorbing connecting rod 4042, so that the stress is more uniform during vibration, and the shock absorbing stability is improved.

[0080] 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 which is detachably connected with the U-shaped opening 5011 and a connecting shaft 406 which is movably connected with the connecting hole 5012.

[0081] The two sides of the U-shaped opening 5011 are respectively provided with limiting protrusions 50111, and the quick release switch 405 includes a screw rod 4051, both ends of the screw rod 4051 are respectively provided with limiting nuts 4052, and the inner side of the limiting nut 4052 is provided with an inner groove 40521 matched with the limiting protrusion 50111.

[0082] The quick release switch 405 has two states of opening and closing. In the closed state, the inner groove 40521 is clamped with the limiting protrusion 50111, so as to limit the quick release switch 405 in the U-shaped opening 5011. In the open state, the inner groove 40521 is separated from the limiting protrusion 50111, so as to separate the screw rod 4051 from the U-shaped opening 5011, so that the frame 501 can rotate around the connecting shaft 406.

[0083] In this embodiment, reference is made to Figure 1 , Figure 4 and Figure 8The rear assembly 50 has a U-shaped opening 5011 and a connecting hole 5012 at its front end, meaning both the U-shaped opening 5011 and the connecting hole 5012 are located at the front end of the frame 501. The frame 501 can be a single beam-like structure, serving to connect the rear wheel and the shock absorber assembly 40. The bracket of the shock absorber assembly 40 is movably connected to the connecting hole 5012 of the frame 501 via a connecting shaft 406. A quick-release switch 405 is located on the bracket of the shock absorber assembly 40. The U-shaped opening 5011 on the frame 501 can be fixed by locking it onto the screw 4051. The screw 4051 functions similarly to a fixing pin, limiting the movable connection between the shock absorber assembly 40 and the frame 501 to a fixed connection. Conversely, separating the U-shaped opening 5011 from the screw 4051 will restore it to a movable connection state. When using the folding bicycle, loosen the limiting nuts 4052 at both ends of the screw 4051 on the quick-release switch 405. This will separate the inner groove 40521 on the inner side of the limiting nut 4052 from the U-shaped limiting protrusion 50111 on the outer side of the U-shaped opening 5011. The U-shaped opening 5011 will no longer be limited by the inner groove 40521, allowing it to separate from the screw 4051. This leaves only the connecting shaft 406 connecting the shock absorber assembly 40 to the frame 501, enabling rotational folding. Correspondingly, the quick-release switch is opened when the bicycle is fixed.

[0084] Tighten the limiting nuts 4052 at both ends of the screw 4051, so that the inner groove 40521 of the limiting nut 4052 engages with the limiting protrusion 50111 of the U-shaped opening 5011, so that the U-shaped opening 5011 locks the screw 4051 to achieve a fixing effect.

[0085] In one embodiment, the quick-release switch 405 also includes a locking lever 4053 and two return springs 4054;

[0086] The locking rod 4053 is located at one end of the screw 4051; two return springs 4054 are both sleeved on the screw 4051, and one of the return springs 4054 abuts against the left bracket 4021 of the shock absorber at one end and against the left limit nut 4052 at the other end, and the other return spring 4054 abuts against the right bracket 4022 of the shock absorber at one end and against the right limit nut 4052 at the other end.

[0087] In the embodiment, one end of the screw rod 4051 of the quick release switch 405 is provided with a locking rod 4053, the quick release of the screw rod 4051 and the U-shaped opening 5011 can be realized by pulling the locking rod 4053, and one limiting nut 4052 close to the locking rod 4053 is provided with a circular arc part, so that the locking rod 4053 is not easy to be loosened in the locking state due to vibration. The screw rod 4051 on both sides of the limiting nut 4052 and the shock absorption assembly 40 is sleeved with a return spring 4054, so that the limiting nut 4052 can be quickly opened when the locking rod 4053 is released, the limiting state of the inner groove 40521 and the limiting protrusion 50111 is released, and the quick folding is realized.

[0088] In one embodiment, the driving assembly 60 includes a left crank 601, a right crank 602, a first lower limiting part 603 and a second lower limiting part 604.

[0089] The left crank 601 is connected to the left end of the driving shaft 201 through a first ratchet 605, and the right crank 602 is connected to the right end of the driving shaft 201 through a second ratchet 606.

[0090] The first lower limiting part 603 is arranged at a first position between the transmission structure 20 and the left crank 601, and is used for limiting the lower limit position of the rotation of the left crank 601; the second lower limiting part 604 is arranged at a second position between the transmission structure 20 and the right crank 602, and is used for limiting the lower limit position of the rotation of the right crank 602.

[0091] The driving assembly 60 further includes a first upper limiting part 607 and a second upper limiting part 608; the first upper limiting part 607 is arranged on the left side of the transmission structure 20 close to the left end of the driving shaft 201, and is used for limiting the upper limit position of the rotation of the left crank 601.

[0092] The second upper limiting part 608 is arranged on the right side of the transmission structure 20 close to the right end of the driving shaft 201, and is used for limiting the upper limit position of the rotation of the right crank 602.

[0093] More specifically, the left end of the connecting shaft 406 is connected with the first lower limiting part 603, the end of the first lower limiting part 603 is provided with a first elastic block 6031, and the left crank 601 abuts against the first elastic block 6031 when the left crank 601 is at the lower limit position of the rotation; the right end of the connecting shaft 406 is connected with the second lower limiting part 604, the end of the second lower limiting part 604 is provided with a second elastic block 6041, and the right crank 602 abuts against the second elastic block 6041 when the right crank 602 is at the lower limit position of the rotation.

[0094] In the embodiment, unlike the traditional pedal bicycle, the left and right cranks of the traditional pedal bicycle continuously rotate in a complete circular motion during use, but the left crank 601 and the right crank 602 of the above folding bicycle are alternately reciprocating curve motion, so that during the downward movement of the crank of the bicycle, in order to prevent the crank from continuing to rotate and making the movement amplitude too large for the user to grasp the balance, the lower limit part needs to be set to limit it. When the user needs to rest, the lower limit part can also support the crank. Specifically, the two ends of the drive shaft 201 are connected with the left crank 601 and the right crank 602 respectively, and the power of the two cranks is transmitted to the transmission structure 20 connected in the middle, and then drives the left front wheel 101 and the right front wheel 101 to rotate. The front ends of the left crank 601 and the right crank 602 are connected to the two sides of the transmission structure 20 respectively, and are located at the upper end of the transmission structure 20 close to the upper part. The connecting shaft 406 is located at the upper end of the transmission structure 20 close to the lower part. For reference Figure 1 、 Figure 4 and Figure 7 Take the left crank 601 and the first lower limit part 603 as an example, the right crank 602 and the second lower limit part 604 are similar. When the left crank 601 abuts against the first lower limit part 603, the left crank 601 is located at the lower limit position of its rotation, and at this time the first lower limit part 603 is close to the middle part of the left crank 601 as much as possible, so as to avoid that the length of the force arm is too long when the left crank 601 is under stress, which causes the pressure of the connection between the first lower limit part 603 or the left crank 601 and the transmission structure 20 to be too large, and if the strength of the material used by the left crank 601 or the transmission structure 20 is not enough, the risk of fracture is easy to occur. In addition, the first elastic block 6031 is arranged at the end of the first lower limit part 603, which can form a buffering effect when the left crank 601 abuts against the first lower limit part 603, which can protect the left crank 601 and facilitate standing riding, so that the first elastic block 6031 with elasticity can play a certain shock absorption effect. Taking the coordinate origin located on the transmission shaft and the X-axis facing the front of the vehicle as an example, the lower limit position of the left crank 601 and the right crank 602 can be set at an angle of 180 degrees to 240 degrees with the horizontal plane. When riding, the user pedals in the range of about 100 degrees, for example, pedals in the range of 135 degrees to 225 degrees, which can always pedal in the most efficient angle interval, and the up and down reset also saves a lot of idle stroke compared with 360 degrees of circular motion. In this case, the crank can be longer than the crank of the ordinary bicycle. According to the principle of lever, the longer the force arm, the more labor-saving, and the ordinary bicycle is limited in length because the crank works in a circle and cannot hit the ground. In addition, this up and down pedaling is more suitable for standing riding, so the body weight of the person is also fully utilized, so it is easier to ride, and standing riding is also more in line with ergonomics. The above three points make the pedaling system more than 50% more efficient than the ordinary bicycle.

[0095] refer to Figure 7 Taking the first ratchet 605 as an example, the second ratchet 606 is similar. The first ratchet 605 includes a first tooth seat 6051, a first spring 6052, a first ratchet 6053, and a first tooth sleeve 6054. The second ratchet 606 includes a second tooth seat 6061, a second spring 6062, a second ratchet 6063, and a second tooth sleeve 6064. The first ratchet 605 achieves unidirectional rotation of the left crank 601 by the first tooth sleeve 6054 configured inside the front end of the left crank 601 and engaging with the first tooth seat 6051 at the left end of the drive shaft 201. That is, the first ratchet 6053 is engaged with the first tooth seat 6051, and one end of the first spring 6052 abuts against the first ratchet 6053 and the other end abuts against the first tooth seat 6051, so that the first ratchet 6053 meshes with the first tooth sleeve 6054 to achieve unidirectional locking. In practical use, when the left crank 601 moves from top to bottom, the left crank 601 and the drive shaft 201 are locked. The left crank 601 drives the drive shaft 201 to rotate, and the drive shaft 201 drives the driven shaft to achieve power input. When the left crank 601 moves from bottom to top, the left crank 601 and the drive shaft 201 are unlocked. The left crank 601 returns to its original position while the drive shaft 201 does not rotate. That is, the movement from bottom to top is the idle stroke of the left crank 601. It is worth mentioning that the number of the first spring 6052 and the first ratchet 6053 can be set as needed, and can be one, two, three, etc.

[0096] In addition, the front end of the left crank 601 is provided with a first connecting sleeve 60121, which is sleeved on the first ratchet 605, and a first limiting block is provided on the outer wall of the first connecting sleeve 60121.

[0097] The first upper limit part 607 includes a first torsion spring 6071 and a first limiting claw 6072. The first limiting claw 6072 has a protruding first claw end. The first limiting claw 6072 is rotatably sleeved on the drive mechanism. One end of the first torsion spring 6071 is engaged with the first limiting claw 6072, and the other end is engaged with the drive mechanism, limiting the first claw end to the limiting position of the first limiting block. Rotating the first limiting claw 6072 can cause the first claw end to disengage from the limiting position of the first limiting block.

[0098] The front end of the right crank 602 is provided with a second connecting sleeve 60221, which is sleeved on the second ratchet 606. A second limiting block is provided on the outer wall of the second connecting sleeve 60221.

[0099] The second upper limit portion 608 comprises a second torsion spring 6081 and a second limit claw 6082 having a protruding second claw end, the second limit claw 6082 being rotatably sleeved to the driving mechanism, one end of the second torsion spring 6081 being clamped to the second limit claw 6082 and the other end being clamped to the driving mechanism, the second claw end being limited to the limiting position of the second limit block, and the second limit claw 6082 being rotated to make the second claw end disengage from the limiting position of the second limit block;

[0100] The left end of the driving shaft 201 is sleeved with a third torsion spring, one end of the third torsion spring being clamped to the first connecting sleeve 60121 and the other end being clamped to the driving mechanism;

[0101] The right end of the driving shaft 201 is sleeved with a fourth torsion spring, one end of the fourth torsion spring being clamped to the second connecting sleeve 60221 and the other end being clamped to the driving mechanism.

[0102] Taking the left crank 601 as an example, the right crank 602 is similar, the front end of the left crank 601, i.e. the end of the left crank 601 connected to the driving shaft 201, is a first connecting sleeve 60121, the first connecting sleeve 60121 being a hollow tube sleeved on the first ratchet wheel 605, the inner wall of the first connecting sleeve 60121 being provided with a toothed structure capable of cooperating with the first toothed sleeve 6054, the first claw end of the first limit claw 6072 abutting against the outer surface of the first connecting sleeve 60121, the first limit block abutting against the first claw end of the first limit claw 6072 as the first connecting sleeve 60121 is rotated upward, the first limit claw 6072 limiting the first limit block, Figures 1 to 4 one end of the first torsion spring 6071 being clamped to the first limit claw 6072 and the other end being clamped to the housing of the transmission structure 20, the first torsion spring 6071 being twisted to generate elastic potential energy when the first limit claw 6072 is rotated, the first limit claw 6072 being restored to the original position by the first torsion spring 6071 after being released, and the first limit claw 6072 being rotated upward to make the first claw end away from the rotating path of the first limit block when it is necessary to fold the folding bicycle, so that the first limit claw 6072 can no longer block the first limit block, and the left crank 601 can be rotated upward and forward to the side of the front left wheel 101 without obstruction.

[0103] In order to enable the left crank 601 and the right crank 602 to be automatically reset upwards after the process of working downwards is ended, the two ends of the driving shaft 201 are respectively provided with a third torsional spring and a fourth torsional spring matched with the driving shaft 201, and taking the left crank 601 as an example, when the left crank 601 is stepped downwards to rotate, the third torsional spring is rotated and twisted, and at this time, the third torsional spring continuously accumulates elastic potential energy, when the user changes the gravity center to step the right crank 602, the left crank 601 is not subjected to the downward force, at this time, the elastic potential energy of the third torsional spring is released to drive the left crank 601 to rotate upwards to restore the original position, so as to facilitate the user to step back and forth to ride.

[0104] In one embodiment, the rear end of the left crank 601 is provided with a first connecting pipe 6011, the first connecting pipe 6011 has a first interface 60111 and a second interface 60112 which are perpendicular to each other, the first interface 60111 is sleeved with the left crank 601, and the second interface 60112 is connected with a left pedal 6012 which can be folded around the rear end of the left crank 601;

[0105] The rear end of the right crank 602 is provided with a second connecting pipe 6021, the second connecting pipe 6021 has a third interface 60211 and a fourth interface 60212 which are perpendicular to each other, the third interface 60211 is sleeved with the right crank 602, and the fourth interface 60212 is connected with a right pedal 6022 which can be folded around the rear end of the right crank 602;

[0106] The first connecting pipe 6011 further comprises a first anti-rotation interface 60113, the left crank 601 further comprises a first anti-rotation assembly 6013 which is detachably connected with the left crank 601 through the first anti-rotation interface 60113 and limits the first connecting pipe 6011;

[0107] The second connecting pipe 6021 further comprises a second anti-rotation interface 60213, the right crank 602 further comprises a second anti-rotation assembly 6023 which is detachably connected with the right crank 602 through the second anti-rotation interface 60213 and limits the second connecting pipe 6021.

[0108] In the embodiment, reference is made to the accompanying drawings Figure 7For example, the first connecting pipe 6011 is a "T" or "L" type connecting pipe, the two end pipe orifice axes of the first connecting pipe 6011 are perpendicular to each other, one end of the first connecting pipe 6011 is sleeved on the rear end of the left crank 601, the first connecting pipe 6011 can rotate about the axis of the rear end of the left crank 601, and the other end of the first connecting pipe 6011 is connected to one end of the left pedal 6012, and the left pedal 6012 can rotate about the axis of the rear end of the left crank 601. When the folding bicycle is folded, rotating the first connecting pipe 6011 upward by 90° can make the left pedal 6012 parallelly adhere to the left side of the left front wheel 101; in addition, in order to form support for the feet of the user when the left pedal 6012 is used, a mechanism for preventing the first connecting pipe 6011 from rotating is further arranged on the first connecting pipe 6011. The first anti-rotation assembly 6013 is a part or a combination of several parts with a circumferential limiting structure, and is composed of a spring sheet 60131, a first anti-rotation stop sheet 60132 and a screw 60133, wherein the inner side of the first anti-rotation stop sheet 60132 is provided with an inwardly protruding quadrilateral protrusion, and the end face of the end of the left crank 601 is provided with a quadrilateral groove, the quadrilateral protrusion and the quadrilateral groove are clamped, and the screw 60133 is fixed to the end of the left crank 601, so that the first anti-rotation stop sheet 60132 cannot rotate circumferentially, and at this time, the spring sheet 60131 is clamped between the first anti-rotation stop sheet 60132 and the first connecting pipe 6011 to increase the rotating friction of the first connecting pipe 6011, that is, only when the left pedal 6012 is pulled very hard, the left pedal 6012 can rotate. The end of the first connecting pipe 6011 and the left crank 601 can also be provided with clamping blocks, that is, the inner side wall of the first connecting pipe 6011 and the outer side wall of the end of the left crank 601 are provided with clamping blocks matched with each other, so as to limit the left pedal 6012 when it is folded outward to a position parallel to the horizontal plane, and the second connecting pipe 6021 is similar to the first connecting pipe 6011, and will not be repeated here.

[0109] In one embodiment, the tail assembly 50 comprises a frame 501, a suspension frame 502, a left wheel arm 503, a right wheel arm 504, a left rear wheel 505 and a right rear wheel 506.

[0110] The suspension frame 502 comprises a left connecting port 5021, a right connecting port 5022 and a connecting rod 5023, and the suspension frame 502 is in the shape of an inverted "T" as a whole; one end of the left wheel arm 503 is connected to the left rear wheel 505, and the other end is connected to the left connecting port 5021, and the left wheel arm 503 can rotate with the axis of the left connecting port 5021 as the center axis; one end of the right wheel arm 504 is connected to the right rear wheel 506, and the other end is connected to the right connecting port 5022, and the right wheel arm 504 can rotate with the axis of the right connecting port 5022 as the center axis;

[0111] The connecting rod 5023 is movably connected to the frame 501;

[0112] The left rear wheel 505 and the right rear wheel 506 each have a use state position and a folding state position; when the left rear wheel 505 and the right rear wheel 506 are each in the use state position, the left rear wheel 505 and the right rear wheel 506 are in the shape of an outer "8" as a whole, and when the left rear wheel 505 and the right rear wheel 506 are each in the folding state position, the left rear wheel 505, the right rear wheel 506 and the frame 501 are parallel as a whole.

[0113] In the embodiment, referring to Figure 8 and Figure 9 , the suspension frame 502 can be an integrally formed piece, or can be formed by welding or splicing between several parts, can be a "V" shaped piece, or can be a "T" shaped piece, and after the connecting rod 5023 is connected to the frame 501 through a rotating shaft, the connecting rod 5023 has the function of guiding the steering of the left rear wheel 505 and the right rear wheel 506, and it is worth mentioning that the left end and the right end of the suspension frame 502 are slightly inclined upward, and the end of the left wheel arm 503 connected to the left rear wheel 505 is slightly inclined downward and connected to the left end of the suspension frame 502, and the right wheel arm 504 has a similar structure to the left wheel arm 503. After connection, when the left rear wheel 505 and the right rear wheel 506 are each in the use state position, the left rear wheel 505 and the right rear wheel 506 are in the shape of an outer "8" as a whole, and at this time, the left rear wheel 505 and the right rear wheel 506 are below the suspension frame 502. When the left rear wheel 505 and the right rear wheel 506 are each in the folding 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 parallel as a whole, 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-mentioned use state position and folding state position refer to two different fixed positions of the left rear wheel 505 and the right rear wheel 506. After folding, the two wheels are in a parallel state, the overall structure is tightened compared to before folding, the occupied space is reduced, and they can be used as support wheels; in addition, the end of the left wheel arm 503 connected to the left rear wheel 505 is provided with a first wheel fork 5031, and the left rear wheel 505 is connected to the first wheel fork 5031 through a wheel shaft and a screw; the end of the right wheel arm 504 connected to 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 and a screw.

[0114] Referring to Figure 8 The left wheel arm 503 is provided with a first joint 5032 at one end of the left connecting port 5021, and the first joint 5032 is connected to the left connecting port 5021 through a first positioning member 5033. The first positioning member 5033 is provided with a first clamping position and a second clamping position at an outer end thereof. The right wheel arm 504 is provided with a second joint 5042 at one end of the right connecting port 5022, and the second joint 5042 is connected to the right connecting port 5022 through a second positioning member 5043. The second positioning member 5043 is provided with a third clamping position and a fourth clamping position at an outer end thereof.

[0115] When the left wheel and the right wheel are in the use state position, the first joint 5032 and the left connecting port 5021 are clamped in the first clamping position, and the second joint 5042 and the right connecting port 5022 are clamped in the third clamping position. When the left wheel and the right wheel are in the folded state position, the first joint 5032 and the left connecting port 5021 are clamped in the second clamping position, and the second joint 5042 and the right connecting port 5022 are clamped in the fourth clamping position.

[0116] The first positioning member 5033 includes a first limiting cover 50331, a first spring 50332, a first screw 50333, and a first fixed shaft 50334. The inner side of the cover plate of the first limiting cover 50331 is provided with a first limiting protrusion 503311 and a hollow first connecting shaft 503312. The second positioning member 5043 includes a second limiting cover 50431, a second spring 50432, a second screw 50433, and a second fixed shaft 50434. The inner side of the cover plate of the second limiting cover 50431 is provided with a second limiting protrusion and a hollow second connecting shaft 504312. Wherein,

[0117] The first fixed shaft 50334 is connected to the left connecting port 5021, and the first joint 5032 is sleeved on the first fixed shaft 50334. The first clamping position is a first gap on the outer end of the first joint 5032, and the second clamping position is a second gap on the outer end of the first joint 5032. The first connecting shaft 503312 is inserted into the first fixed shaft 50334 and is clamped in the circumferential direction. The first screw 50333 is connected to the first fixed shaft 50334 through the bottom of the first connecting shaft 503312. One end of the first spring 50332 abuts against the bottom of the first connecting shaft 503312, and the other end abuts against the nut of the first screw 50333.

[0118] The second fixed shaft 50434 is connected with the right connecting port 5022, the second joint 5042 is sleeved on the second fixed shaft 50434, the third clamping position is a third notch on the outer end of the first joint 5032, the fourth clamping position is a fourth notch on the outer end of the second joint 5042, the second connecting shaft 504312 is inserted into the second fixed shaft 50434 and clamped in the circumferential direction of the second fixed shaft 50434, the second screw 50433 passes through the bottom of the second connecting shaft 504312 and connects with the second fixed shaft 50434, one end of the second spring 50432 abuts against the bottom of the second connecting shaft 504312, and the other end of the second spring 50432 abuts against the nut of the second screw 50433;

[0119] When the left wheel and the right wheel are in the use state position, the first limiting protrusion 503311 is clamped with the first notch, and the second limiting protrusion is clamped with the third notch; when the left wheel and the right wheel are in the folding state position, the first limiting protrusion 503311 is clamped with the third notch, and the second limiting protrusion is clamped with the fourth notch.

[0120] The first positioning member 5033 further comprises at least one first positioning member bearing 50335; the second positioning member 5043 further comprises at least one second positioning member bearing 50435;

[0121] The first positioning member bearing 50335 is clamped on the first fixed shaft 50334, and the first joint 5032 is movably connected with the first positioning member bearing 50335; the second positioning member bearing 50435 is clamped on the second fixed shaft 50434, and the second joint 5042 is movably connected with the second positioning member bearing 50435.

[0122] In one embodiment, the front wheel assembly 30 comprises a front wheel pipe 301, a V-shaped joint 302, a left handle 303, and a right handle 304; wherein,

[0123] The V-shaped joint 302 is connected to the top end of the front wheel pipe 301, and the V-shaped joint 302 has a first connecting port 3021 and a second connecting port 3022 which are inclined downward;

[0124] The left handle 303 is movably connected to the first connecting port 3021, and the left handle 303 can rotate around the first connecting port 3021 with the axis line of the first connecting port 3021 as the center axis; the right handle 304 is movably connected to the second connecting port 3022, and the right handle 304 can rotate around the second connecting port 3022 with the axis line of the second connecting port 3022 as the center axis;

[0125] The left handle 303 and the right handle 304 each have a use state position and a folding state position; when the left handle 303 and the right handle 304 are each in the use state position, the left handle 303, the right handle 304 and the head pipe 301 are in the shape of “Y” as a whole, and when the left handle 303 and the right handle 304 are each in the folding state position, the left handle 303 and the right handle 304 are each parallel to the head pipe 301 as a whole.

[0126] In the embodiment, one end of the left handle 303 is provided with a third joint 3031, and one end of the right handle 304 is provided with a fourth joint 3041; the left handle 303 further comprises a first limiting ring 3032 and a first limiting screw 3033; the right handle 304 further comprises a second limiting ring 3042 and a second limiting screw 3043; wherein,

[0127] A pair of first openings 30311 passing through one side to the opposite side are arranged on the side wall of the third joint 3031, and a pair of second openings 30411 passing through one side to the opposite side are arranged 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;

[0128] The first limiting screw 3033 is inserted from one side of the first limiting ring 3032, passes through the first opening 30311 and is fixed to the other side of the first limiting ring 3032, so that the first limiting ring 3032 is sleeved on the third joint 3031, and the second limiting screw 3043 is inserted from one side of the second limiting ring 3042, passes through the second opening 30411 and is fixed to the other side of the second limiting ring 3042, so that the second limiting ring 3042 is sleeved on the fourth joint 3041;

[0129] When the left handle 303 and the right handle 304 are each in the use state position, the first opening 30311 corresponds to the first limiting notch 30211, the first limiting ring 3032 is clamped on the outside of the first connecting port 3021, and the first limiting screw 3033 is clamped on the first limiting notch 30211; the second opening 30411 corresponds to the third limiting notch 30221, the second limiting ring 3042 is clamped on the outside 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 each in the folding state position, the first opening 30311 corresponds to the second limiting notch 30212, the first limiting ring 3032 is clamped on the outside of the first connecting port 3021, and the first limiting screw 3033 is clamped on the second limiting notch 30212; the second opening 30411 corresponds to the fourth limiting notch 30222, the second limiting ring 3042 is clamped on the outside of the second connecting port 3022, and the second limiting screw 3043 is clamped on the fourth limiting notch 30222.

[0130] Take the left handle 303 as an example: the first opening 30311 is a pair of openings with the axis of the third joint 3031 as the symmetry axis, and the first limiting screw 3033 can slide left and right in the first opening 30311, which forms a sliding groove for the first limiting screw 3033. By external force, for example, the user can pull the first limiting screw 3033 left and right in the first opening 30311, so that the first limiting screw 3033 can slide left and right in the first opening 30311. When it is necessary to fix the left handle 303 in the use state position, only need to insert the third joint 3031 of the left handle 303 into the first connecting port 3021 in the use state position, at this time, the side of the first opening 30311 close to the first limiting gap 30211 is aligned with the first limiting gap 30211, then the first limiting screw 3033 is pulled onto the first limiting gap 30211 for clamping, so that the left handle 303 is fixed. It is worth mentioning that the first limiting screw 3033 can be connected with the first limiting gap 30211 by interference fit, and can also be connected by spring as described in the subsequent embodiments. When disassembling, only need to pull out the first limiting screw 3033 from the first limiting gap 30211, the left handle 303 can be rotated and stored. The left handle 303 fixed in the folding state position is similar to the above principle and will not be described again; similarly, the fixing and dismounting principles of the right handle 304 in the use state position and the folding state position are similar to those of the left handle 303 and will not be described again. In addition, the first limiting gap 30211 and the second limiting gap 30212 can be arranged adjacent to each other, that is, the second limiting gap 30212 is next to the first limiting gap 30211, which can be specifically as shown in Figure 12 The use state position of the left handle 303 is slightly inclined to the front of the vehicle, the user's hand is stretched forward to control the handlebar, and the whole vehicle can be made smaller. The inclination effect can be as shown in the accompanying Figure 5 .

[0131] In one embodiment, the left handle 303 further comprises a third spring 3034; the right handle 304 further comprises a fourth spring 3044; wherein,

[0132] The third joint 3031 is internally provided with a first limiting hook 30312, one end of the third spring 3034 is connected to the first limiting hook 30312, and the other end is connected to the first limiting screw 3033;

[0133] The fourth joint 3041 is internally provided with a second limiting hook 30412, one end of the fourth spring 3044 is connected to the second limiting hook 30412, and the other end is connected to the second limiting screw 3043.

[0134] In the embodiment, the left handle 303 is taken as an example for illustration, and the right handle 304 is symmetrical to the left handle 303, and can be analogized. The third joint 3031 is a tubular joint, and the inside of the third joint 3031 can accommodate the brake line to pass through. The first limiting hook 30312 is arranged inside the third joint 3031 and close to the opening of the third joint 3031, and the first opening 30311 is arranged in the third joint 3031 more inward than the first limiting hook 30312. When the third spring 3034 is connected to the first limiting hook 30312 at one end and connected to the first limiting screw 3033 at the other end, the third spring 3034 is in a stretched state and can always generate a spring force to pull the first limiting screw 3033 to the first limiting hook 30312. Since the third joint 3031 is inserted into the first connecting port 3021 for connection, when connected, the first limiting hook 30312 is located inside the first limiting notch 30211, that is, a pulling force is always generated to clamp the first limiting screw 3033 on the first limiting notch 30211, preventing the first limiting screw 3033 from being separated from the first limiting notch 30211. The connection of the first limiting screw 3033 to the second limiting notch 30212 is similar to the above, and will not be repeated here.

[0135] Obviously, the above-described embodiments are only some of the embodiments of the present application, but not all the embodiments. The preferred embodiments of the present application are shown in the drawings, but do not limit the patent scope of the present application. The present application can be implemented in many different forms, and contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some technical features. Any equivalent structure made by using the content of the specification and drawings, directly or indirectly applied to other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A folding bicycle, characterized in that, The utility model provides a two-wheeled vehicle, which comprises two front wheels, a transmission structure, a vehicle head assembly, a shock-absorbing assembly, a vehicle tail assembly provided with a rear wheel and a driving assembly. One end of the transmission structure is provided with a driving shaft, and the other end is provided with a driven shaft. The driving assembly is foldably connected to the driving shaft and can be folded to the side of the front wheel assembly. The outer shell of the transmission structure is movably connected to the shock-absorbing assembly. The shock-absorbing assembly comprises a shock absorber, a shock absorber support, a first shock-absorbing connecting rod and a second shock-absorbing connecting rod. The shock absorber is arranged in the shock absorber support.

2. The folding bicycle of claim 1, wherein The shock absorber support comprises a left shock absorber support and a right shock absorber support. The first left shock-absorbing connecting rod is movably connected to the left shock absorber support through a bearing. The first right shock-absorbing connecting rod is movably connected to the right shock absorber support through a bearing. The second left shock-absorbing connecting rod is movably connected to the left shock absorber support through a bearing. The second right shock-absorbing connecting rod is movably connected to the right shock absorber support through a bearing.

3. The folding bicycle of claim 2, wherein, The front end of the vehicle tail assembly is provided with a U-shaped opening and a connecting hole. The shock-absorbing assembly is provided with a quick release switch which is detachably connected to the U-shaped opening and a connecting shaft which is movably connected to the connecting hole. The two sides of the U-shaped opening are respectively provided with limiting protrusions. The quick release switch comprises a screw rod. The inner side of the limiting nut is provided with an inner groove which is matched with the limiting protrusion. The quick release switch has two states of opening and closing, when in the closed state, the inner groove is clamped with the limiting protrusion, so that the quick release switch is limited in the U-shaped opening; when in the open state, the inner groove is separated from the limiting protrusion, so that the screw rod is separated from the U-shaped opening, and the frame can rotate around the connecting shaft.

4. The folding bicycle of claim 3, wherein The quick release switch further comprises a locking rod and a return spring; The locking rod is arranged at one end of the screw rod; both the return springs are sleeved on the screw rod, and one end of one of the return springs abuts against the left support of the shock absorber, and the other end abuts against the left limiting nut, and one end of the other return spring abuts against the right support of the shock absorber, and the other end abuts against the right limiting nut.

5. The folding bicycle of claim 1, wherein, The driving assembly comprises a left crank, a right crank, a first lower limiting portion and a second lower limiting portion; The left crank is connected with the left end of the driving shaft through a first ratchet, and the right crank is connected with the right end of the driving shaft through a second ratchet; The first lower limiting portion is arranged at a first position between the transmission structure and the left crank, and is used for limiting the lower limit position of rotation of the left crank; and the second lower limiting portion is arranged at a second position between the transmission structure and the right crank, and is used for limiting the lower limit position of rotation of the right crank.

6. The folding bicycle of claim 5, wherein, The driving assembly further comprises a first upper limiting portion and a second upper limiting portion; the first upper limiting portion is arranged at a position close to the left end of the driving shaft on the left side of the transmission structure, and is used for limiting the upper limit position of rotation of the left crank; and the second upper limiting portion is arranged at a position close to the right end of the driving shaft on the right side of the transmission structure, and is used for limiting the upper limit position of rotation of the right crank. The rear end of the left crank is provided with a first connecting pipe, the first connecting pipe has a first interface and a second interface with axes perpendicular to each other, the first interface is sleeved with the left crank, and the second interface is connected with a left pedal, the left pedal can be folded around the rear end of the left crank; 7. The folding bicycle of claim 5, wherein, The rear end of the right crank is provided with a second connecting pipe, the second connecting pipe has a third interface and a fourth interface with axes perpendicular to each other, the third interface is sleeved with the right crank, and the fourth interface is connected with a right pedal, 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 assembly, the first anti-rotation assembly is detachably connected with the left crank through the first anti-rotation interface, and limits the first connecting pipe; The second connecting pipe further comprises a second anti-rotation interface, the right crank further comprises a second anti-rotation assembly, the second anti-rotation assembly is detachably connected with the right crank through the second anti-rotation interface, and limits the second connecting pipe. The tail assembly comprises a frame, a suspension frame, a left wheel arm, a right wheel arm, a left rear wheel and a right rear wheel; 8. The folding bicycle of claim 1, wherein, The suspension frame comprises a left connecting interface, a right connecting interface and a connecting rod, and the suspension frame as a whole has an inverted "T" shape; one end of the left wheel arm is connected with the left rear wheel, and the other end is connected with the left connecting interface, the left wheel arm can rotate around the axis of the left connecting interface as a center shaft; one end of the right wheel arm is connected with the right rear wheel, and the other end is connected with the right connecting interface, and the right wheel arm can rotate around the axis of the right connecting interface as a center shaft; ​ The connecting rod is movably connected with the frame; The left rear wheel and the right rear wheel each have a use state position and a folding state position; when the left rear wheel and the right rear wheel are each in the use state position, the left rear wheel and the right rear wheel are in an overall outer "8" shape; when the left rear wheel and the right rear wheel are each in the folding state position, the left rear wheel, the right rear wheel and the frame are in parallel.

9. The folding bicycle of claim 1, wherein, The front wheel assembly comprises a front pipe, a V-shaped joint, a left handle and a right handle; wherein, The V-shaped joint is connected at the top end of the front pipe, and has 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 the left handle can rotate around the first connecting port with the axis of the first connecting port as the center axis; the right handle is movably connected with the second connecting port, and the right handle can rotate around the second connecting port with the axis of the second connecting port as the center axis; The left handle and the right handle each have a use state position and a folding state position; when the left handle and the right handle are each in the use state position, the left handle, the right handle and the front pipe are in an overall "Y" shape; when the left handle and the right handle are each in the folding state position, the left handle and the right handle are each in parallel with the front pipe.

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