Folding two-wheeled vehicle

Abstract

The utility model relates to the technical field of bicycles, and particularly discloses a folding two-wheel bicycle which comprises a handle, a bicycle body set, a first bicycle head vertical pipe, a second bicycle head vertical pipe, a first connecting limiting piece, a second connecting limiting piece and a third connecting limiting piece. The first bicycle head vertical pipe is provided with a handle joint for connecting the left handle and the right handle; the first headstock vertical pipe is provided with a first connecting part; the second bicycle head vertical pipe is provided with a second connecting part and a third connecting part; a connecting pipe is arranged on the front frame, and a fourth connecting part is arranged on the connecting pipe; a fifth connecting part hinged with the front frame is arranged at one end of the rear frame, and a rear wheel fork for mounting a rear wheel is arranged at the other end of the rear frame; the first connecting limiting piece is connected with the first bicycle head vertical pipe and the second bicycle head vertical pipe. The second connecting limiting piece is connected with the second bicycle head vertical pipe and the connecting pipe, and the third connecting limiting piece is connected with the front bicycle frame and the rear bicycle frame. The first bicycle head vertical pipe, the second bicycle head vertical pipe and the rear bicycle frame are each provided with a using state position and a folding state position.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle technical field especially relates to a folding double -wheeled vehicle. BACKGROUND

[0002] Using bicycle is a kind of travel mode that people commonly use, and when riding to subway station or bus station to transfer subway or bus, the current bicycle is inconvenient for user to carry into subway or bus due to the large body, and directly placing in subway station or bus station, there are problems such as storage and theft prevention, therefore, people hope to have bicycle or electric bicycle can be carried, and how to miniaturize bicycle, folding vehicle body becomes a problem to be solved urgently. SUMMARY

[0003] Therefore, the utility model provides a folding double -wheeled vehicle for solving the technical problem in the above background art.

[0004] To achieve one or part or all of the above purposes or other purposes, the utility model provides a folding double -wheeled vehicle, which comprises: handle, car body group, first car head vertical pipe, second car head vertical pipe, first connecting limiting piece, second connecting limiting piece and third connecting limiting piece.

[0005] The handle comprises left handle and right handle.

[0006] One end of the first car head vertical pipe is provided with handle joint, and the two ends of the handle joint are used for installing the left handle and the right handle respectively;The other end of the first car head vertical pipe is provided with first connecting part.

[0007] One end of the second car head vertical pipe is provided with second connecting part hinged with the first connecting part, and the other end of the second car head vertical pipe is provided with third connecting part.

[0008] The car body group comprises front frame, rear frame, main wheel and rear wheel, the main wheel is rotatably installed on the front frame, the top of the front frame is provided with connecting pipe, and the connecting pipe is provided with fourth connecting part hinged with the third connecting part.

[0009] One end of the rear frame is provided with fifth connecting part hinged with the front frame, and the other end of the rear frame is provided with rear wheel fork for installing the rear wheel.

[0010] The first connecting limiting piece is installed on the first car head vertical pipe, and the first connecting limiting piece can be connected with the second car head vertical pipe;The second connecting limiting piece is installed on the second car head vertical pipe, and the second connecting limiting piece can be connected with the connecting pipe;The third connecting limiting piece is installed on the front frame, and the third connecting limiting piece can be connected with the rear frame.

[0011] The first front vertical pipe, the second front vertical pipe and the rear frame each have a use state position and a folding state position;

[0012] When the first front vertical pipe, the second front vertical pipe and the rear frame are in the use state position, the first front vertical pipe and the second front vertical pipe are coaxially connected, the second front vertical pipe and the connecting pipe are coaxially connected, the first connecting limiting piece connects the first front vertical pipe and the second front vertical pipe, the second connecting limiting piece connects the second front vertical pipe and the connecting pipe, the rear wheels are distributed at intervals from the main wheels, and the third connecting limiting piece connects the front frame and the rear frame;

[0013] When the first front vertical pipe and the second front vertical pipe are in the folding state position, an included angle α is formed between the first front vertical pipe and the second front vertical pipe, an included angle β is formed between the second front vertical pipe and the connecting pipe, the first connecting limiting piece is not connected to the second front vertical pipe, the second connecting limiting piece is not connected to the connecting pipe, the rear wheels are close to the main wheels, and the third connecting limiting piece is not connected to the rear frame.

[0014] Preferably, the first connecting part comprises a first connecting wall and a first boss provided on the first connecting wall; the second connecting part comprises a second connecting wall and a first groove provided on the second connecting wall, the first groove being provided with a first opening in the radial direction of the second front vertical pipe; the first boss is inserted into the first groove, and the first boss is hinged to the first groove through a rotating shaft, and turning over the first front vertical pipe can make the first boss repeatedly rotate in and out of the first groove through the first opening;

[0015] The third connecting part comprises a third connecting wall and a second boss provided on the third connecting wall; the fourth connecting part comprises a fourth connecting wall and a second groove provided on the fourth connecting wall, the second groove being provided with a second opening in the radial direction of the second front vertical pipe; the second boss is inserted into the second groove, and the second boss is hinged to the second groove through a rotating shaft, and turning over the second front vertical pipe can make the second boss repeatedly rotate in and out of the first groove through the second opening.

[0016] Preferably, the first connecting wall is an inclined end wall provided at one end of the first front vertical pipe, and the second connecting wall is an inclined end wall provided at one end of the first front vertical pipe; when the first front vertical pipe is in the use state position, the first connecting wall is in close contact with the second connecting wall;

[0017] The third connecting wall is an inclined end wall provided at the other end of the second front vertical pipe, and the fourth connecting wall is an inclined end wall provided at one end of the connecting pipe; when the second front vertical pipe is in the use state position, the third connecting wall is in close contact with the fourth connecting wall;

[0018] The first connecting limiting piece and the second connecting limiting piece are both threaded pipes provided with internal threads;

[0019] The first head vertical pipe is provided with a first upper thread at a position close to the first connecting part, the second head vertical pipe is provided with a first lower thread at a position close to the second connecting part, the first connecting limiting part is sleeved at the first upper thread of the first head vertical pipe, and the first connecting limiting part can be connected with the first lower thread;

[0020] The second head vertical pipe is provided with a second upper thread at a position close to the third connecting part, the connecting pipe is provided with a second lower thread at a position close to the fourth connecting part, the second connecting limiting part is sleeved at the second upper thread of the second head vertical pipe, and the second connecting limiting part can be connected with the second lower thread.

[0021] Preferably, the rear wheel fork comprises a rotating rod and a wheel fork, the rotating rod is rotatably installed at one end of the rear frame away from the fifth connecting part, and the rotating rod is perpendicular to the ground when the rear frame is in the use state position; the side wall of the rotating rod is provided with a first magnet; the rear wheel is rotatably installed on the wheel fork, and the axis of the rear wheel is parallel to the axis of the rotating rod;

[0022] The outer wall of the first head vertical pipe is provided with a second magnet which is adsorbed with the first magnet; when the rear frame is in the folding state position, the first magnet and the second magnet are adsorbed in close contact.

[0023] Preferably, the front frame is provided with spaced upper through holes and lower through holes, and the lower through holes are provided with mounting shafts;

[0024] The fifth connecting part is two rotating cylinders, the two rotating cylinders are symmetrically installed at the end of the rear frame, and the rotating cylinders are rotatably connected with the mounting shafts; the end of the rear frame is further provided with two third limiting notches;

[0025] The fifth connecting limiting part comprises a locking pull rod, a locking nut, a locking block, a pull rod connecting shaft, a quick release wrench, a first return spring and a second return spring; wherein,

[0026] One end of the locking pull rod is fixedly connected with the locking nut after sequentially penetrating through the locking block and the upper through hole, and the other end of the locking pull rod is hingedly connected with the quick release wrench through the pull rod connecting shaft; the locking nut is spaced apart from the side wall of the front frame and forms a first clamping position, and the locking block is spaced apart from the side wall of the front frame and forms a second clamping position;

[0027] The first return spring and the second return spring are both sleeved on the locking pull rod, the first return spring connects the locking nut and the side wall of the front frame, and the second return spring connects the locking block and the side wall of the front frame;

[0028] When the rear frame is in the use state position, the two third limiting notches of the rear frame are respectively clamped into the first clamping position and the second clamping position, and are pressed on the front frame through the locking nut and the locking block; when the rear frame is in the folded state position, the two third limiting notches of the rear frame are separated from the first clamping position and the second clamping position.

[0029] Preferably, both ends of the handle joint are provided with a connecting port having a first clamping position and a second clamping position, and the left handle and the right handle are respectively provided with a connecting head threadedly connected with the connecting port; the left handle and the right handle can rotate around the connecting port with the axis of the connecting port as the central axis, and the connecting head can be clamped in the first clamping position and the second clamping position, respectively.

[0030] The left handle and the right handle each have a use state position and a folded 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 first vehicle head vertical pipe integrally form a "Y" shape, and the connecting head is clamped in the first clamping position; when the left handle and the right handle are each in the folded state position, the left handle and the right handle each integrally form a parallel relationship with the first vehicle head vertical pipe, and the connecting head is clamped in the second clamping position.

[0031] Preferably, the handle further comprises two sets of limiting assemblies for connecting the connecting port and the connecting head, and the limiting assembly comprises a limiting ring, a limiting screw and a first return spring.

[0032] A pair of guide holes are provided on the side wall of the connecting head, the guide holes are strip-shaped holes extending along the axial direction of the connecting head, the first clamping position is a pair of first limiting notches on the side wall of the connecting port, the second clamping position is a pair of second limiting notches on the side wall of the connecting port, and the inside of the connecting head is provided with a limiting hook.

[0033] The limiting screw is inserted from one side of the limiting ring, passes through the guide hole and is fixed to the other side of the limiting ring, one end of the first return spring is connected to the limiting hook, and the other end of the first return spring is connected to the limiting screw; when the limiting ring moves along the axial direction of the connecting head, the limiting screw moves along the length direction of the guide hole and limits the circumferential rotation of the limiting ring relative to the connecting head.

[0034] When the left handle and the right handle are each in the use state position, the guide holes correspond to the first limiting notches, and the limiting screw is clamped in the first limiting notches; when the left handle and the right handle are each in the folded state position, the guide holes correspond to the second limiting notches, and the limiting screw is clamped in the second limiting notches; pulling the limiting ring can make the limiting ring move away from the connecting port, and the limiting screw is separated from the first limiting notches or the second limiting notches.

[0035] Preferably, the vehicle body further comprises two sets of footrest assemblies for driving the rotation of the main wheels, the two sets of footrest assemblies being symmetrically mounted on the front frame; the footrest assembly comprises a crank, a limiting mechanism, a pedal, a first guide pipe and a second guide pipe in communication with each other;

[0036] One end of the crank is connected to the front frame for driving the rotation of the main wheels, and the other end of the crank is provided with a connecting column, the connecting column is provided with a limiting hole, and the outer wall of the connecting column is further provided with a locking plane;

[0037] One end of the second guide pipe is fixed to the side wall of the first guide pipe, and the first guide pipe is rotatably sleeved on the connecting column;

[0038] The pedal is provided with a connecting rod, the end of the connecting rod is adapted to the locking plane and is magnetically adsorbed; the connecting rod is coaxially installed in the second guide pipe, and the connecting rod can slide along the axial direction of the second guide pipe; pulling the connecting rod can make the pedal have a supporting state and a folding state; when the pedal is in the supporting state, the end of the connecting rod is inserted into the limiting hole of the connecting column; when the pedal is in the folding state, the connecting rod is separated from the limiting hole, and the end of the connecting rod is adapted to the locking plane;

[0039] The limiting mechanism is mounted on the second guide pipe, and the axial displacement of the connecting rod in the second guide pipe is limited by the limiting mechanism.

[0040] Preferably, the limiting mechanism comprises a ball, a sleeve, a second reset spring and a fixing ring; the fixing ring is coaxially installed at the end of the second guide pipe away from the first guide pipe; the pipe wall of the second guide pipe is provided with a mounting through hole;

[0041] The second reset spring is sleeved on the outer wall of the second guide pipe, one end of the reset spring abuts against the fixing ring, and the other end of the reset spring is used for connecting the sleeve;

[0042] The sleeve is slidably sleeved on the second guide pipe, and the inner wall of the sleeve is provided with a ring step for abutting against the second reset spring; the inner wall of the sleeve is further provided with a avoiding groove, and sliding the sleeve can make the avoiding groove of the sleeve connect the mounting through hole;

[0043] The outer wall of the connecting rod is provided with a limiting groove, and pulling the connecting rod can make the limiting groove connect the mounting through hole;

[0044] The ball is mounted in the mounting through hole, and the diameter of the ball is greater than the thickness of the wall of the second guide pipe; the ball has a locking position and an unlocking position, when the ball is in the locking position, the inner side of the ball is embedded in the limiting groove, and the outer side of the ball abuts against the inner wall of the sleeve; when the ball is in the unlocking position, the inner side of the ball abuts against the outer wall of the connecting rod, and the outer side of the ball is embedded in the avoiding groove.

[0045] Preferably, the pedal assembly further comprises a limiting sliding block, a hand knob and a reset torsional spring.

[0046] The front frame is provided with a driving shaft for driving the main wheel to rotate, the driving shaft is arranged at intervals with the rotating shaft of the main wheel, and the end of the driving shaft is provided with a ratchet part for connecting the crank;

[0047] The inside of the crank is provided with an inner tooth ring in one-way engagement with the ratchet part, and the outer wall of the crank is provided with a stopper;

[0048] The reset torsional spring is mounted on the driving shaft, one end of the reset torsional spring is connected with the crank, and the reset torsional spring drives the crank to rotate in the direction opposite to the engagement direction of the inner tooth ring and the ratchet part, and the crank can be close to the rotating shaft of the main wheel;

[0049] The outer wall of the front frame is provided with a sliding cavity, the limiting sliding block is slidably mounted in the sliding cavity, one end of the limiting sliding block is provided with a third reset spring connected with the front frame, the other end of the limiting sliding block can extend out of the sliding cavity, and the other end of the limiting sliding block is used for abutting against the stopper and limiting the reverse rotation of the crank in the engagement direction of the inner tooth ring and the ratchet part; the hand knob is connected with the limiting sliding block, and the hand knob can drive the other end of the limiting sliding block to be accommodated in the sliding cavity;

[0050] The crank has a use state position and a storage state position, when the crank is in the use state position, one end of the crank provided with a pedal is away from the main wheel, and the stopper is limited by the limiting sliding block; when the crank is in the storage state position, one end of the crank provided with a pedal is close to the main wheel, and the crank is close to the rotating shaft of the main wheel.

[0051] The embodiment of the utility model is implemented, and the following beneficial effects are achieved:

[0052] After the above scheme is adopted, the folding double-wheel vehicle is a single-wheel structure, and occupies a smaller space, facilitating carrying. In order to take into account the riding use of the user, the first vehicle head vertical pipe and the second vehicle head vertical pipe are hingedly connected, and the second vehicle head vertical pipe and the connecting pipe on the front vehicle frame are hingedly connected, so that the first vehicle head vertical pipe and the second vehicle head vertical pipe both have a folding state position, facilitating storage and carrying, and having the advantages of miniaturization and light weight when carrying. The first connecting limiting piece and the second connecting limiting piece are installed on the first vehicle head vertical pipe and the second vehicle head vertical pipe to maintain the use state position of the first vehicle head vertical pipe and the second vehicle head vertical pipe, ensuring the stability of the folding double-wheel vehicle when in use. The fifth connecting part provided on the rear vehicle frame is hingedly connected with the side wall of the front vehicle frame, so that the rear vehicle frame can be folded on the main wheel by turning over, the length of the folding double-wheel vehicle is reduced to reduce the occupied space, facilitating carrying. The third connecting limiting piece is used to ensure the stability of the rear vehicle frame in the use state position. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0054] Among them:

[0055] Figure 1 The overall structure of the embodiment Figure 1 ;

[0056] Figure 2 The overall structure of the embodiment Figure 2 ;

[0057] Figure 3 The overall structure of the embodiment Figure 1 ;

[0058] Figure 4 The overall structure of the embodiment Figure 2 ;

[0059] Figure 5 is the A-A sectional view in Figure 3 ;

[0060] Figure 6 The overall structure of the embodiment

[0061] Figure 7 is the B-B sectional view in Figure 3 ;

[0062] Figure 8 is an enlarged view of part C in Figure 3

[0063] Figure 9 is an enlarged view of part D in Figure 5

[0064] Figure 10 is an enlarged view of part E in Figure 6

[0065] Figure 11 is an enlarged view of part F in Figure 6

[0066] Figure 12 is an enlarged view of part G in Figure 6

[0067] Figure 13 is an exploded view of the pedal assembly of the present embodiment;

[0068] Figure 14 is a sectional view of the pedal assembly in the present embodiment;

[0069] Figure 15 is a structural schematic view of the first guide pipe and the second guide pipe in the present embodiment;

[0070] Figure 16 is a structural schematic view of the sleeve in the present embodiment.

[0071] Reference signs:

[0072] 10, left handle; 11, right handle; 12, connecting head; 120, guide hole; 121, limiting hook; 13, limiting ring; 14, limiting screw; 15, first return spring;

[0073] 2, vehicle body assembly; 20, front frame; 200, drive shaft; 201, ratchet part; 202, upper through hole; 203, mounting shaft; 21, main wheel; 22, connecting pipe; 220, fourth connecting part; 221, fourth connecting wall; 222, second recess; 222a, second opening; 223, second lower thread; 23, crank; 230, connecting column; 230a, limiting hole; 230b, locking plane; 231, inner tooth ring; 232, stop block; 24, limiting mechanism; 240, ball; 241, sleeve; 241a, ring step; 241b, avoiding groove; 242, second return spring; 243, fixing ring; 244, anti-skid cover; 25, pedal; 250, connecting rod; 251, limiting recess; 26, first guide pipe; 27, second guide pipe; 270, mounting through hole; 28, rear frame; 280, fifth connecting part; 280a, rotating cylinder; 281, rear wheel fork; 281a, rotating rod; 281b, wheel fork; 281c, first magnet; 282, third limiting notch; 29, rear wheel;​​​​​

[0074] 3, first head vertical pipe; 30, handle joint; 300, connecting port; 301, first clamping position; 301a, first limiting gap; 302, second clamping position; 302a, second limiting gap; 31, first connecting part; 310, first connecting wall; 311, first boss; 32, first upper thread; 33, second magnet;

[0075] 4, second head vertical pipe; 40, second connecting part; 400, second connecting wall; 401, first recess; 401a, first opening; 41, third connecting part; 410, third connecting wall; 411, second boss; 42, first lower thread; 43, second upper thread;

[0076] 51, first connecting limiting piece; 52, second connecting limiting piece; 53, third connecting limiting piece; 530, locking pull rod; 531, locking nut; 532, locking block; 534, pull rod connecting shaft; 535, quick release wrench; 536, first return spring; 537, second return spring;

[0077] 60, limiting sliding block; 61, hand dial; 63, reset torsional spring. DETAILED DESCRIPTION

[0078] 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 specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the present application is well suited to carry out the objects and advantages thereof and will be understood by practitioners of the art. The terms "comprise" (comprising), "have" (having) and "include" (including) as used herein are meant to be interpreted in a non-limiting manner. The terms "first", "second", "third", etc. as used herein are meant to be interpreted in a non-limiting manner.

[0079] 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 embodiments. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0080] In order to make the technical personnel in the art better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings.

[0081] As shown in the accompanying drawings Figures 1-16As shown, the utility model embodiment provides a folding double -wheeled vehicle, this folding double -wheeled vehicle includes: handle, car body group 2, first car head vertical pipe 3, second car head vertical pipe 4, first connecting stop piece 51, second connecting stop piece 52 and third connecting stop piece 53, handle includes left handle 10 and right handle 11,

[0082] One end of first car head vertical pipe 3 is equipped with handle joint 30, and both ends of handle joint 30 are used to install left handle 10 and right handle 11 respectively, and the other end of first car head vertical pipe 3 is equipped with first connecting portion 31,

[0083] One end of second car head vertical pipe 4 is equipped with second connecting portion 40 articulated with first connecting portion 31, and the other end of second car head vertical pipe 4 is equipped with third connecting portion 41,

[0084] Car body group 2 includes front frame 20, main wheel 21, rear frame 28 and rear wheel 29, main wheel 21 is rotatably installed on front frame 20, the top of front frame 20 is equipped with connecting pipe 22, and connecting pipe 22 is equipped with fourth connecting portion 220 articulated with third connecting portion 41,

[0085] One end of rear frame 28 is equipped with fifth connecting portion 280 articulated with front frame 20, and the other end of rear frame 28 is equipped with rear wheel fork 281 for installing rear wheel 29,

[0086] First connecting stop piece 51 is installed on first car head vertical pipe 3, and first connecting stop piece 51 can be connected with second car head vertical pipe 4, second connecting stop piece 52 is installed on second car head vertical pipe 4, and second connecting stop piece 52 can be connected with connecting pipe 22, third connecting stop piece 53 is installed on front frame 20, and third connecting stop piece 53 can be connected with rear frame 28,

[0087] First car head vertical pipe 3, second car head vertical pipe 4 and rear frame 28 all have use state position and folding state position,

[0088] When first car head vertical pipe 3, second car head vertical pipe 4 and rear frame 28 are in use state position, first car head vertical pipe 3 is coaxially butted with second car head vertical pipe 4, second car head vertical pipe 4 is coaxially butted with connecting pipe 22, and first connecting stop piece 51 connects first car head vertical pipe 3 and second car head vertical pipe 4, second connecting stop piece 52 connects second car head vertical pipe 4 and connecting pipe 22, rear wheel 29 is distributed with interval with main wheel 21, and third connecting stop piece 53 connects front frame 20 and rear frame 28,

[0089] When the first front vertical pipe 3 and the second front vertical pipe 4 are in the folded state position, the first front vertical pipe 3 and the second front vertical pipe 4 have an included angle α, the second front vertical pipe 4 and the connecting pipe 22 have an included angle β, and the first connecting limiting piece 51 is not connected with the second front vertical pipe 4, and the second connecting limiting piece 52 is not connected with the connecting pipe 22; the rear wheel 29 is close to the main wheel 21, and the third connecting limiting piece 53 is not connected with the rear frame 28.

[0090] Specifically, the first front vertical pipe 3, the second front vertical pipe 4 and the handle are all tubular structures with internal through holes. The handle joint 30 on the first front vertical pipe 3 connects the internal cavity of the first front vertical pipe 3, so that the brake control piece, the speed control piece, the oil pipe or other wires on the left handle 10 and the right handle 11 can be connected to the bottom vehicle body group 2 through the internal cavity after the left handle 10 and the right handle 11 are installed on the handle joint 30, so that the folding bicycle does not have too many exposed wires, improves the appearance neatness of the folding bicycle, and is convenient for subsequent folding and storage or unfolding and support use of the first front vertical pipe 3 and the second front vertical pipe 4. In this embodiment, the first connecting part 31 and the second connecting part 40 with the same structure are respectively arranged at the bottom end of the first front vertical pipe 3 and the second front vertical pipe 4, and the second connecting part 40 and the fourth connecting part 220 with the same structure are respectively arranged at the top end of the second front vertical pipe 4 and the connecting pipe 22. The first connecting part 31 is hinged with the second connecting part 40, so that the first front vertical pipe 3 can be folded by turning over. When the first front vertical pipe 3 and the second front vertical pipe 4 are in the folded state position, the included angle α between the first front vertical pipe 3 and the second front vertical pipe 4 is less than 60 degrees. Similarly, the second front vertical pipe 4 and the connecting pipe 22 adopt the same hinge structure to realize the turning over and folding of the second front vertical pipe 4 compared with the connecting pipe 22, and the included angle β between the second front vertical pipe 4 and the connecting pipe 22 is less than 60 degrees. The smaller included angle α and included angle β make the first front vertical pipe 3 and the second front vertical pipe 4 have smaller external extension length when they are in the folded state position, thereby reducing the occupied space of the folding bicycle when it is stored. Specifically, the connecting pipe 22 is arranged at the top of the front frame 20, that is, the position of the connecting pipe 22 is spaced apart from the position of the rotating shaft of the main wheel 21, so that the first front vertical pipe 3 and the second front vertical pipe 4 present a shape surrounding the main wheel 21 when they are in the folded state position, thereby realizing the miniaturization of the folding bicycle when it needs to be stored, and facilitating the user to carry the folding bicycle.

[0091] This folding two-wheeled vehicle features a rear wheel 29 on top of the main wheel 21 to enhance riding stability. The outer diameter of the rear wheel 29 is smaller than that of the main wheel 21. The vehicle moves by rotating the main wheel 21, causing the rear wheel 29 to rotate as well. The rear wheel 29 enhances the stability of the folding two-wheeled vehicle during travel. Specifically, it is hinged to the side wall of the front frame 20 via a fifth connecting part 281 on the rear frame 28. This hinge allows the rear frame 28 to be folded and rotated onto the main wheel 21. The length of the folding two-wheeled vehicle is reduced to minimize its space requirements and facilitate carrying. Furthermore, a third connecting limiter 53 ensures the stability of the rear frame 28 in the usage position. For example, the third connecting limiter 53 is a fastening screw with threaded holes on the front frame 20 and through holes on the rear frame 28. When the rear frame 28 is flipped to the usage position, the fastening screw locks the rear frame 28 to the front frame 20, ensuring the stability of the rear frame 28 and rear wheel 29 during use. It should also be noted that the main wheel 21 and the front frame 20 are positioned as shown in the attached... Figure 3 On the two vertically offset surfaces shown, the first front vertical tube 3, the second front vertical tube 4, and the rear frame 28 are flipped on the vertical surface where the front frame 20 is located, so that the first front vertical tube 3, the second front vertical tube 4, and the rear frame 28 in the folded state are in the position where the main wheels 21 overlap, further reducing the space occupied by the folding two-wheeled vehicle.

[0092] To further improve the stability of the first front vertical tube 3 and the second front vertical tube 4 in the folded position, straps with Velcro can be installed at corresponding positions on the front frame 20 to enhance the sturdiness of the folding two-wheeled vehicle when carried. To improve the stability of the folding two-wheeled vehicle during use, a first connecting limiter 51 and a second connecting limiter 52 are installed between the first head tube 3 and the second head tube 4, and between the second head tube 4 and the connecting pipe 22, respectively. In this embodiment, the first connecting limiter 51 and the second connecting limiter 52 adopt the same structural configuration. The first connecting limiter 51 restricts the hinge between the first head tube 3 and the second head tube 4, improving the structural stability of the first head tube 3 in the use position and preventing unnecessary hinge flipping during riding. For example, threaded holes extending axially can be provided on the first connecting part 31 and the second connecting part 40. When the first head tube 3 and the second head tube 4 are coaxially connected, the threaded holes on the first connecting part 31 and the second connecting part 40 are connected by fastening bolts, thereby keeping the first head tube 3 in the use position. The connection structure between the second head tube 4 and the connecting pipe 22 is the same as that between the first head tube 3 and the second head tube 4, which will not be described in detail.

[0093] In summary, the folding two-wheeled vehicle is a single-wheeled structure, which occupies less space and is convenient to carry. In order to take into account the user's riding use, the first head vertical pipe 3 and the second head vertical pipe 4 are hingedly connected, and the second head vertical pipe 4 and the connecting pipe 22 on the front frame 20 are hingedly connected, so that the first head vertical pipe 3 and the second head vertical pipe 4 both have a folding state position, so as to facilitate storage and carrying, and have the advantages of miniaturization and light weight when carrying. The first connecting limiting piece 51 and the second connecting limiting piece 52 are installed on the first head vertical pipe 3 and the second head vertical pipe 4 to maintain the use state position of the first head vertical pipe 3 and the second head vertical pipe 4, and ensure the stability of the folding two-wheeled vehicle when in use.

[0094] Referring to the drawings Figure 9 The first connecting part 31 comprises a first connecting wall 310 and a first boss 311 arranged on the first connecting wall 310; the second connecting part 40 comprises a second connecting wall 400 and a first recess 401 arranged on the second connecting wall 400, and the first recess 401 is provided with a first opening 401a in the radial direction of the second head vertical pipe 4; the first boss 311 is inserted into the first recess 401, and the first boss 311 is hingedly connected with the first recess 401 through a rotating shaft, and turning over the first head vertical pipe 3 can make the first boss 311 repeatedly rotate in and out of the first recess 401 through the first opening 401a.

[0095] The third connecting part 41 comprises a third connecting wall 410 and a second boss 411 arranged on the third connecting wall 410; the fourth connecting part 220 comprises a fourth connecting wall 221 and a second recess 222 arranged on the fourth connecting wall 221, and the second recess 222 is provided with a second opening 222a in the radial direction of the second head vertical pipe 4; the second boss 411 is inserted into the second recess 222, and the second boss 411 is hingedly connected with the second recess 222 through a rotating shaft, and turning over the second head vertical pipe 4 can make the second boss 411 repeatedly rotate in and out of the first recess 401 through the second opening 222a.

[0096] Specifically, a rotating shaft can be arranged between the first boss 311 and the first groove 401 to connect the first head vertical pipe 3 and the second head vertical pipe 4, and realize the hinged relationship between the first head vertical pipe 3 and the second head vertical pipe 4. Further, the first opening 401a is arranged on the first groove 401, so that the first head vertical pipe 3 can be flipped in the direction of the first opening 401a. In this embodiment, the end of the first boss 311 is a rounded structure, and the side wall close to the first opening 401a is a straight wall structure. When the first head vertical pipe is in the use state position, the end of the first boss 311 is in contact with the bottom wall of the first groove 401. When the first boss 311 is moved in the direction away from the first opening 401a by external force, the side wall of the first boss 311 is in contact with the bottom wall of the first groove 401, and at this time, the first head vertical pipe 3 is in the folded state position. When it is needed to convert the first head vertical pipe 3 from the folded state position to the use state position, the end of the first boss 311 and the bottom wall of the first groove 401 need to be overcome to convert. The structure design can improve the structural stability of the first head vertical pipe 3 in the folded state position. Further, in actual production, the bottom wall of the first groove 401 can be arranged as an inclined wall structure, that is, the bottom wall of the first groove 401 is arranged to be inclined towards the first opening 401a, so that the included angle α of the first head vertical pipe 3 in the folded state position is smaller, and the force to be overcome when the first head vertical pipe 3 is converted to the use state is larger. Similarly, the second head vertical pipe 4 and the connecting pipe 22 are in the same condition when they are converted from the use state position to the folded state position, and will not be described here.

[0097] In order to ensure that the first head vertical pipe 3 is flipped only in the direction of the first opening 401a, and the second head vertical pipe 4 is flipped only in the direction of the second opening 222a, and improve the structural stability of the folding bicycle, the first connecting wall 310 is an inclined end wall arranged at one end of the first head vertical pipe 3, and the second connecting wall 400 is an inclined end wall arranged at one end of the first head vertical pipe 3. When the first head vertical pipe 3 is in the use state position, the first connecting wall 310 is in contact with the second connecting wall 400.

[0098] The third connecting wall 410 is an inclined end wall arranged at the other end of the second head vertical pipe 4, and the fourth connecting wall 221 is an inclined end wall arranged at one end of the connecting pipe 22. When the second head vertical pipe 4 is in the use state position, the third connecting wall 410 is in contact with the fourth connecting wall 221.

[0099] Specifically, the inclination direction of the first connecting wall 310 is opposite to the inclination direction of the bottom wall of the first groove 401, so that when the first head vertical pipe 3 is flipped away from the first opening 401a, the first connecting wall 310 is in contact with the second connecting wall 400 and cannot be flipped, thereby achieving the limiting effect. At this time, the first head vertical pipe 3 is in the coaxially butted position of the second head vertical pipe 4, that is, the use state position of the first head vertical pipe 3. Similarly, the second head vertical pipe 4 and the connecting pipe 22 are in the same situation when they are in the use state position, and will not be described again.

[0100] In order to connect the oil pipes or other wires of the corresponding control structures of the left handle 10 and the right handle 11 to the inside of the vehicle body group 2, the first connecting wall 310 is provided with a first through hole connecting the internal cavity of the first head vertical pipe 3; the second connecting wall 400 is provided with a second through hole connecting the internal cavity of the second head vertical pipe 4; the third connecting wall 410 is provided with a third through hole connecting the internal cavity of the second head vertical pipe 4; and the fourth connecting wall 221 is provided with a fourth through hole connecting the internal cavity of the connecting pipe 22. After the oil pipes and other wires enter the first head vertical pipe 3 through the handle joint 30, they can pass through the first through hole, the second through hole, the internal cavity of the second head vertical pipe 4, the third through hole and the fourth through hole in turn, and then enter the inside of the front frame 20 to connect with the corresponding control structure, realizing the internal wiring arrangement of the folding two-wheeled vehicle. The length of the oil pipes and other wires can also be reserved to ensure that the oil pipes and other wires will not be damaged by pulling when the first head vertical pipe 3 and the second head vertical pipe 4 are in the folded state position. The first through hole, the second through hole, the third through hole and the fourth through hole are all ordinary opening structures, which are not shown in the drawings of the present embodiment.

[0101] In order to improve the stability of the first head vertical pipe 3 and the second head vertical pipe 4 when they are in the use state position, and the convenience of user adjustment, the first connecting limiting member 51 and the second connecting limiting member 52 are both threaded pipes provided with internal threads.

[0102] The first head vertical pipe 3 is provided with a first upper thread 32 at a position close to the first connecting part 31, the second head vertical pipe 4 is provided with a first lower thread 42 at a position close to the second connecting part 40, the first connecting limiting member 51 is sleeved at the first upper thread 32 of the first head vertical pipe 3, and the first connecting limiting member 51 can be connected with the first lower thread 42.

[0103] The second head vertical pipe 4 is provided with a second upper thread 43 at a position close to the third connecting part 41, the connecting pipe 22 is provided with a second lower thread 223 at a position close to the fourth connecting part 220, the second connecting limiting member 52 is sleeved at the second upper thread 43 of the second head vertical pipe 4, and the second connecting limiting member 52 can be connected with the second lower thread 223.

[0104] The first upper thread 32 and the first lower thread 42 are distributed on both sides of the first connecting part 31 and the second connecting part 40, when the first connecting limiting part 51 connects the first upper thread 32 and the first lower thread 42 at the same time, the first connecting part 31, the second connecting part 40 and the first connecting limiting part 51 are surrounded, so that the first connecting part 31 and the second connecting part 40 cannot be relatively turned, that is, the first vehicle head vertical pipe 3 is kept in the use state position; on the contrary, by rotating the first connecting limiting part 51, it can be moved to the handle joint 30 direction, that is, the threaded connection of the first connecting limiting part 51 and the first lower thread 42 can be released, after the first connecting limiting part 51 completely separates from the first lower thread 42, the first vehicle head vertical pipe 3 can be converted from the use state position to the folding state position. The coaxially sleeved first connecting limiting part 51 is convenient for users to manually rotate to realize quick adjustment, and is convenient for users to switch different use modes of the folding double-wheeled vehicle. Similarly, the same structure is adopted between the second vehicle head vertical pipe 4 and the connecting pipe 22, and details are not repeated.

[0105] In order to make the folding double-wheeled vehicle complete the steering operation in the driving process, the embodiment further provides a rotatable rear wheel fork 281 structure, so that the rear wheel 29 has a certain steering ability. Specifically, the rear wheel fork 281 includes a rotating rod 281a and a wheel fork 281b. The rotating rod 281a is rotatably installed at one end of the rear frame 28 away from the fifth connecting part 53, and is perpendicular to the ground when the rear frame 28 is in the use state position. A side wall of the rotating rod 281a is provided with a first magnet 281c. The rear wheel 29 is rotatably installed on the wheel fork 281b, and the axis of the rear wheel 29 is parallel to the axis of the rotating rod 281a.

[0106] The outer wall of the first vehicle head vertical pipe 3 is provided with a second magnet 33 which is adsorbed with the first magnet 281c. When the rear frame 28 is in the folding state position, the first magnet 281c and the second magnet 33 are attached and adsorbed.

[0107] Specifically, since the first vehicle head vertical pipe 3 and the rear frame 28 are both turned in the vertical plane where the front frame 20 is located, the second magnet 33 is arranged on the outer wall of the first vehicle head vertical pipe 3, and the first magnet 281c is arranged on the corresponding position of the rear wheel fork 281, so that when the first vehicle head vertical pipe 3 and the rear frame 28 are in the folding state position, the stability of the rear frame 28 in the folding state position is realized through the magnetic adsorption of the first magnet 281c and the second magnet 33, and the rear frame 28 is prevented from shaking randomly after being folded.

[0108] Referring to the drawings Figure 12 The front frame 20 is provided with spaced upper through holes 202 and lower through holes, and the lower through holes are provided with mounting shafts 203.

[0109] The fifth connecting part 280 is two rotating drums 280a symmetrically installed at the ends of the rear frame 28, and the rotating drum 280a is rotatably connected to the mounting shaft 203; the end of the rear frame 28 is also provided with two third limiting notches 282;

[0110] The fifth connecting limiting part 53 comprises a locking pull rod 530, a locking nut 531, a locking block 532, a pull rod connecting shaft 534, a quick release wrench 535, a first return spring 536 and a second return spring 537; wherein,

[0111] One end of the locking pull rod 530 is fixedly connected with the locking nut 531 after sequentially penetrating the locking block 532 and the upper through hole 202, and the other end of the locking pull rod 530 is hingedly connected with the quick release wrench 535 through the pull rod connecting shaft 534; the locking nut 531 is spaced apart from the side wall of the front frame 20 and forms a first clamping position, and the locking block 532 is spaced apart from the side wall of the front frame 20 and forms a second clamping position;

[0112] The first return spring 536 and the second return spring 537 are both sleeved on the locking pull rod, the first return spring 536 is connected between the locking nut 531 and the side wall of the front frame 20, and the second return spring 537 is connected between the locking block 532 and the side wall of the front frame 20;

[0113] When the rear frame 28 is in the use state position, the two third limiting notches 282 of the rear frame 28 are respectively clamped into the first clamping position and the second clamping position, and are pressed on the front frame 20 through the locking nut 531 and the locking block 532; when the rear frame 28 is in the folded state position, the two third limiting notches 282 of the rear frame 28 are separated from the first clamping position and the second clamping position.

[0114] Specifically, the caliber of the third limiting notch 282 is larger than the outer diameter of the first return spring 536 and the second return spring 537, and the caliber of the third limiting notch 282 is smaller than the outer diameter of the locking nut 531 and the locking block 532, so that when the third limiting notch 282 is clamped into the first clamping position or the second clamping position, the locking nut 531 or the locking block 532 can press the part of the rear frame 28 with the third limiting notch 282 on the side wall of the front frame 20, and further, a convex ring can be provided at the third limiting notch 282, and a groove structure matched with the convex ring is provided on the inner side of the locking nut 531 and the locking block 532, after the two third limiting notches 282 are clamped into the first clamping position and the second clamping position respectively, the locking nut 531 and the locking block 532 are moved close to each other by turning the quick release wrench 535, so that the groove structure wraps the convex ring, and the part of the rear frame with the third limiting notch is pressed on the side wall of the front frame by the locking nut and the locking block; conversely, the quick release wrench 535 is turned in the opposite direction, the locking nut 531 installed on the locking pull rod 530 is away from the side wall of the front frame 20, and the locking block 532 is opened in the second clamping position under the action of the second return spring 537, the locking nut 531 is opened in the first clamping position under the action of the first return spring 536, and the two third limiting notches 282 on the rear frame 28 can freely enter and exit the first clamping position and the second clamping position.

[0115] Referring to the drawings Figure 10 Both ends of the handle joint 30 are provided with a connecting port 300, the connecting port 300 has a first clamping position 301 and a second clamping position 302, and the left handle 10 and the right handle 11 are both provided with a connecting head 12 threadedly connected with the connecting port 300; the left handle 10 and the right handle 11 can rotate around the connecting port 300 with the axis of the connecting port 300 as the center axis, and the connecting head 12 can be clamped in the first clamping position 301 and the second clamping position 302 respectively;

[0116] The left handle 10 and the right handle 11 both have a use state position and a folding state position; when the left handle 10 and the right handle 11 are both in the use state position, the left handle 10, the right handle 11 and the first head vertical pipe 3 form a whole "Y" shape, and the connecting head 12 is clamped in the first clamping position 301; when the left handle 10 and the right handle 11 are both in the folding state position, the left handle 10 and the right handle 11 are both parallel to the first head vertical pipe 3, and the connecting head 12 is clamped in the second clamping position 302.

[0117] In the embodiment, the left handle 10 and the right handle 11 are in the shape of a long strip as a whole, and in order to facilitate folding storage, the left handle 10 and the right handle 11 are designed to be close to a straight line as a whole, and some bending with some or small radii can be provided as needed. For example, in some embodiments in which the handle itself is relatively small, the left handle 10 and the right handle 11 are each provided with a bending with a length ratio of not more than 35% of the whole and an overall radius of not more than 35°, so that in the use state, the opening angle of the left handle 10 and the right handle 11 as a whole is larger, that is, the angle of the above-mentioned "Y" shape is larger, and the force arm of the handle controlling the vehicle head is also longer, which is easier to control and more in line with ergonomics.

[0118] In the embodiment, the use state position and the folding state position of the left handle 10 or the right handle 11 refer to two fixed positions of the left handle 10 and the right handle 11. The use state position corresponds to the position of the left handle 10 and the right handle 11 when they are used for riding, and the folding state position corresponds to the position of the left handle 10 and the right handle 11 when they are folded for storage. Specifically, the connection head 12 and the connection port 300 are preferentially connected by threads to improve the connection stability of the left handle 10 or the right handle 11 and the handle joint 30. When the left handle 10 and the right handle 11 are both in the use state position, the rotation position of the left handle 10 can be limited by a limiting structure such as a screw passing through the connection head 12 and the connection port 300 from the side wall in sequence. At this time, the first clamping position 301, that is, the position at which the screw hole on the connection head 12 and the screw hole on the connection port 300 are aligned, is clamped by the screw after limiting, and the left handle 10 cannot rotate any more, that is, the left handle 10 is fixed in the use state position. Similarly, the right handle 11 is fixed in a similar manner, which will not be described again.

[0119] Referring to the accompanying drawings Figure 10 The handle further comprises two sets of limiting assemblies for connecting the connection port 300 and the connection head 12, and the limiting assembly comprises a limiting ring 13, a limiting screw 14, and a first return spring 15.

[0120] The side wall of the connection head 12 is provided with a pair of guide holes 120 passing from one side to the opposite side, and the guide hole 120 is a strip hole extending along the axial direction of the connection head 12. The first clamping position 301 is a pair of first limiting notches 301a on the side wall of the connection port 300, and the second clamping position 302 is a pair of second limiting notches 302a on the side wall of the connection port 300. The inside of the connection head 12 is provided with a limiting hook 121.

[0121] The limiting screw 14 is inserted from one side of the limiting ring 13, passes through the guide hole 120 and is fixed to the other side of the limiting ring 13, one end of the first reset spring 15 is connected to the limiting hook 121, the other end of the first reset spring 15 is connected to the limiting screw 14, when the limiting ring 13 moves along the axial direction of the connecting head 12, the limiting screw 14 moves along the length direction of the guide hole 120 and limits the circumferential rotation of the limiting ring 13 relative to the connecting head 12;

[0122] When the left handle 10 and the right handle 11 are both in the use state position, the guide hole 120 corresponds to the first limiting notch 301a, and the limiting screw 14 is clamped on the first limiting notch 301a; when the left handle 10 and the right handle 11 are both in the folded state position, the guide hole 120 corresponds to the second limiting notch 302a, and the limiting screw 14 is clamped on the second limiting notch 302a; pulling the limiting ring 13 can make the limiting ring 13 away from the connecting port 300, and the limiting screw 14 is separated from the first limiting notch 301a or the second limiting notch 302a.

[0123] In this embodiment, the left handle 10 is taken as an example for description: the above-mentioned guide hole 120 is a pair of openings with the axis of the first joint as the symmetry axis, the limiting screw 14 can slide left and right in the guide hole 120, which is equivalent to that the guide hole 120 forms a sliding groove for the limiting screw 14, and the limiting screw 14 can be moved left and right in the guide hole 120 by external force, for example, the user can pull the limiting screw 14 left and right in the guide hole 120 with his hand, so that the limiting screw 14 can slide left and right in the guide hole 120. When it is needed to fix the left handle 10 in the use state position, only need to insert the connecting head 12 of the left handle 10 into the connecting port 300 in the use state position, at this time, the side of the guide hole 120 close to the first limiting notch 301a is aligned with the first limiting notch 301a, then the limiting screw 14 is pulled to the first limiting notch 301a for clamping, in this way, the left handle 10 is fixed. It is worth mentioning that the limiting screw 14 can be connected to the limiting notch by interference fit, and in addition, the spring can be used to assist the connection as introduced in the subsequent embodiments. When disassembling, only need to pull out the limiting screw 14 from the first limiting notch 301a, the left handle 10 can be rotated and stored. The fixing of the right handle 11 in the folded state position is similar to the above-mentioned principle, and is not described in detail; similarly, the fixing and disassembling principles of the right handle 11 in the use state position and the folded state position are similar to the principle of the left handle 10, and are not described in detail. In addition, the first limiting notch 301a and the second limiting notch 302a can be arranged adjacent to each other, that is, the second limiting notch 302a is beside the first limiting notch 301a, which can be specifically shown in the accompanying drawings, in this case, the use state position of the left handle 10 is slightly inclined to the front of the vehicle, the user stretches his hand forward to control the handlebar, and the whole vehicle can be made smaller, and the inclination effect can be shown in the accompanying drawings. Figure 10 Figure 3 ​​

[0124] In the embodiment, the left handle 10 is taken as an example for illustration, and the right handle 11 is symmetrical to the left handle 10, which can be analogized. The connecting head 12 is a tubular joint, and the inside of the connecting head 12 can accommodate a wire such as an oil pipe to pass through. The limiting hook 121 is arranged inside the connecting head 12 and close to the opening of the connecting head 12, and the guide hole 120 is arranged inside the connecting head 12 close to the limiting hook 121. When the first reset spring 15 is connected to the limiting hook 121 at one end and connected to the limiting screw 14 at the other end, the first reset spring 15 is in a stretched state and can always generate a spring force to pull the limiting screw 14 to the limiting hook 121. Since the connecting head 12 is inserted into the connecting port 300 for connection, when connected, the limiting hook 121 is located inside the first limiting notch 301a, that is, a pulling force is always generated to clamp the limiting screw 14 on the first limiting notch 301a, preventing the first limiting screw 14 from being separated from the first limiting notch 301a. The connection of the limiting screw 14 to the second limiting notch 302a is similar to the above, which will not be described in detail.

[0125] Referring to the drawings Figure 6 The vehicle body assembly 2 further comprises two sets of pedal assemblies for driving the main wheels 21 to rotate, and the two sets of pedal assemblies are symmetrically arranged on the front frame 20. The pedal assembly comprises a crank 23, a limiting mechanism 24, a pedal 25, a first guide pipe 26 and a second guide pipe 27 which are in communication with each other.

[0126] One end of the crank 23 is connected to the front frame 20 for driving the main wheels 21 to rotate, and the other end of the crank 23 is provided with a connecting column 230, the connecting column 230 is provided with a limiting hole 230a, and the outer wall of the connecting column 230 is further provided with a locking plane 230b.

[0127] One end of the second guide pipe 27 is fixed to the side wall of the first guide pipe 26, and the first guide pipe 26 is rotatably sleeved on the connecting column 230.

[0128] The pedal 25 is provided with a connecting rod 250, the end of the connecting rod 250 can be attached to the locking plane 230b and magnetically adsorbed; the connecting rod 250 is coaxially installed in the second guide pipe 27, and the connecting rod 250 can slide along the axial direction of the second guide pipe 27. Pulling the connecting rod 250 can make the pedal 25 have a supporting state and a folding state. When the pedal 25 is in the supporting state, the end of the connecting rod 250 is inserted into the limiting hole 230a of the connecting column 230. When the pedal 25 is in the folding state, the connecting rod 250 is separated from the limiting hole 230a, and the end of the connecting rod 250 is attached to the locking plane 230b.

[0129] The limiting mechanism 24 is installed on the second guide pipe 27, and the limiting mechanism 24 can limit the axial displacement of the connecting rod 250 in the second guide pipe 27.

[0130] Specifically, the connecting column 230 is arranged at the end of the crank 23, so that the pedal 25 can be in the same plane with the crank 23 after being turned over, to facilitate storage; the first guide pipe 26 and the second guide pipe 27 are integrally T-shaped structures, which are common three-way pipe structures, simple in structure and low in production and processing cost, wherein the first guide pipe 26 is used to be connected with the connecting column 230, and when the first guide pipe 26 is sleeved on the connecting column 230, the first guide pipe 26 is connected with the connecting column 230 through a cover plate and bolts, so that the first guide pipe 26 cannot be separated from the connecting column 230, and the second guide pipe 27 can be turned over around the axis of the first guide pipe 26 as the rotation center; the connecting rod 250 of the pedal 25 is a detachable rod structure, specifically, one end of the connecting rod 250 is fixed with the center position of the pedal 25 through bolts, the other end of the connecting rod 250 is inserted into the second guide pipe 27, and the connecting rod 250 is coaxially and slidingly connected in the second guide pipe 27, so that the end of the connecting rod 250 can be inserted into or separated from the limiting hole 230a of the connecting column 230 and stored in the second guide pipe 27, thereby making the pedal 25 be in a supporting state or a folding state respectively, and the pedal 25 in the supporting state is limited from relatively rotating with the connecting column 230 due to the mutual crossing of the connecting rod 250 and the crank 23, so that the pedal 25 can form stable support for the user's instep, at this time, the user can drive the crank 23 to rotate together by treading the pedal 25, to provide power for the main wheel 21; the pedal 25 in the folding state is stored in the second guide pipe 27 due to the connecting rod 250, and the first guide pipe 26 is not limited in the radial direction by the connecting rod 250, and can rotate around the limiting column, at this time, the user can turn over the pedal 25 to the position close to the front frame 20, to facilitate storage or carrying.

[0131] In the embodiment, the outer diameter of the connecting rod 250 is slightly smaller than the inner diameter of the limiting hole 230a, to improve the stability of the connecting rod 250 inserted into the limiting hole 230a, and the limiting hole 230a is chamfered at the opening close to the second guide pipe 27, to facilitate the insertion of the connecting rod 250 into the limiting hole 230a. The embodiment further connects the connecting rod 250 with the limiting mechanism 24 installed at the second guide pipe 27, so that the connecting rod 250 is in the position inserted into the limiting hole 230a in the normal state, and when storage or carrying is needed, the axial limitation of the connecting rod 250 on the second guide pipe 27 is removed by operating the limiting mechanism 24, so that the connecting rod 250 can be slid away from the limiting hole 230a, to turn over the pedal 25 for storage.

[0132] In order to prevent the first guide pipe 26 from being easily rotated by external force when the pedal 25 is in the storage position, the side wall of the connecting column 230 is provided with a locking plane 230b, and the end of the connecting rod 250 can be attached to the locking plane 230b. The locking plane 230b can be arranged at different positions on the side wall of the connecting column 230 according to the specific vehicle model. For example, when the locking plane 230b is parallel to the axis of the limiting hole 230a, and the connecting rod 250 is attached to the locking plane 230b, the connecting rod 250 is in a position perpendicular to the ground. In other embodiments, the locking plane 230b can also form an angle with the axis of the limiting hole 230a, which will not be described here. In this embodiment, the locking plane 230b is provided with two locking planes 230b, which are symmetrically arranged. When the end of the connecting rod 250 is stored in the second guide pipe 27, and the pedal 25 is flipped up or down, the pedal 25 can be attached to the front frame 20 upwardly or downwardly. During this process, the end of the connecting rod 250 is always in contact with the outer wall of the connecting column 230. When the connecting rod 250 is perpendicular to the locking plane 230b, the end of the connecting rod 250 is attached to the locking plane 230b, so that the end of the connecting rod 250 changes from line contact to surface contact with the connecting column 230. At this time, the first guide pipe 26 cannot be easily rotated due to the limitation of the connecting rod 250 and the locking plane 230b. When the pedal 25 is needed to ride the folding bicycle, the user only needs to flip the pedal 25 outwardly to drive the first guide pipe 26 to rotate until the connecting rod 250 is in the same axis as the limiting hole 230a, and then the end of the connecting rod 250 is inserted into the limiting hole 230a. In order to further improve the stability of the pedal 25 when it is stored, the locking plane 230b and the end of the connecting rod 250 are provided with magnets that can be attracted to each other. Through the magnetic attraction of the magnets, the stability of the connection between the two is further improved.

[0133] In one embodiment, the limiting mechanism 24 includes a ball 240, a sleeve 241, a second reset spring 242, and a fixing ring 243. The fixing ring 243 is coaxially installed at the end of the second guide pipe 27 away from the first guide pipe 26. The pipe wall of the second guide pipe 27 is provided with a mounting through hole 270. The second reset spring 242 is sleeved on the outer wall of the second guide pipe 27, one end of the reset spring abuts against the fixing ring 243, and the other end of the reset spring is used to connect the sleeve 241.

[0134] The sleeve 241 is slidably sleeved on the second guide pipe 27, and the inner wall of the sleeve 241 is provided with a ring step 241a for abutting against the second reset spring 242. The inner wall of the sleeve 241 is also provided with an avoiding groove 241b, and sliding the sleeve 241 can make the avoiding groove 241b of the sleeve 241 connect the mounting through hole 270. The outer wall of the connecting rod 250 is provided with a limiting groove 251, and pulling the connecting rod 250 can make the limiting groove 251 connect the mounting through hole 270.

[0135] The ball 240 is installed in the mounting hole 270, and the diameter of the ball 240 is greater than the thickness of the wall of the second guide pipe 27; the ball 240 has a locked position and an unlocked position; when the ball 240 is in the locked position, the inner side of the ball 240 is embedded in the limiting groove 251, and the outer side of the ball 240 abuts against the inner wall of the sleeve 241; when the ball 240 is in the unlocked position, the inner side of the ball 240 abuts against the outer wall of the connecting rod 250, and the outer side of the ball 240 is embedded in the avoiding groove 241b.

[0136] Specifically, the ball 240, the mounting hole 270, and the limiting groove 251 are each provided with two, the two balls 240 are symmetrically arranged with each other to improve the connection stability, and the avoiding groove 241b is an annular groove structure provided in the inner wall of the sleeve 241, so that the ball 240 can be stably embedded in the avoiding groove 241b when moving outward; when the pedal 25 is in the supporting state, the end of the connecting rod 250 is inserted into the limiting hole 230a, and the limiting groove 251 on the connecting rod 250 is aligned with the mounting hole 270; at this time, the inner side of the ball 240 is embedded in the limiting groove 251, and the outer side of the ball 240 is limited by the inner wall of the sleeve 241 and cannot move outward, so that the ball 240 limits the axial displacement of the connecting rod 250 on the second guide pipe 27, and the user cannot pull or push the pull rod at this time; correspondingly, the avoiding groove 241b of the sleeve 241 is away from the fixed ring 243, and the ball 240 is between the avoiding groove 241b and the fixed ring 243 at this time; when it is needed to convert the pedal 25 from the supporting state to the folding state, the axial displacement limitation on the connecting rod 250 needs to be removed, and the user can slide the sleeve 241 to the direction of the fixed ring 243, so as to make the avoiding groove 241b connect the mounting hole 270; at this time, the ball 240 is not limited by the inner wall of the sleeve 241, and the user can pull the connecting rod 250 by force, so that the outer wall of the connecting rod 250 forces the ball 240 to embed in the avoiding groove 241b outward, and the connecting rod 250 can slide away from the limiting hole 230a without being limited by the ball 240; in this embodiment, the inner wall of the sleeve 241 is attached to the outer wall of the second guide pipe 27, the outer wall of the connecting rod 250 is attached to the inner wall of the second guide pipe 27, the sum of the thickness of the wall of the second guide pipe 27 and the depth of the avoiding groove 241b is equal to the sum of the thickness of the wall of the second guide pipe 27 and the depth of the limiting groove 251, and is equal to the diameter of the ball 240, so as to improve the stability of the ball 240 in the mounting hole 270 and the stable limitation on the connecting rod 250; it also needs to be noted that the opening of the limiting groove 251 is provided with a rounded corner, so as to facilitate the ball 240 to slide into or out of the limiting groove 251; the anti-skid sleeve 244 is threadedly connected to the end of the sleeve 241 away from the first guide pipe 26, and the user can hold the anti-skid sleeve 244 to drive the sleeve 241 to move.

[0137] The sleeve 241 forms a mounting cavity of the second return spring 242 at the end far away from the escape groove 241b, and the cavity bottom forms a ring step 241a, so that the end of the second return spring 242 is connected, and when the sleeve 241 slides away from the first guide pipe 26, the second return spring 242 can be compressed, and the sleeve 241 can be released after the user pulls the connecting rod 250, at this time, the sleeve 241 is still unable to reset and continuously compresses the second return spring 242 due to the limitation of the ball 240; when the end of the connecting rod 250 is reinserted into the limiting hole 230a, the outer wall of the connecting rod 250 no longer limits the ball 240, and the limiting groove 251 is aligned with the mounting hole 270, the sleeve 241 slides to the first guide pipe 26 under the action of the second return spring 242, and the inner side of the ball 240 is embedded in the limiting groove 251, at this time, the sleeve 241 resets and limits the ball 240 by the inner wall of the sleeve 241, so that the connecting rod 250 cannot be axially displaced, and the stability is improved. In other words, the user only needs to briefly slide the sleeve 241 with one hand and pull the connecting rod 250 with the other hand, so that the end of the connecting rod 250 is separated from the limiting hole 230a, and then the pedal 25 is turned to the storage position close to the front frame 20, and vice versa, the connecting rod 250 is pushed to the limiting hole 230a, so that the connecting rod 250 is locked by the ball 240

[0138] In the use state, the pedal of the pedal assembly is at a higher position away from the main wheel 21, which facilitates the user to continuously and repeatedly step on the pedal to drive the main wheel 21 to rotate, and when the folding bicycle needs to be stored, the longer extension structure is not conducive to the storage of the folding bicycle. Therefore, the embodiment is provided with the following structure for the crank 23, so that the crank 23 has a storage state position and a use state position. Specifically, the pedal assembly further comprises a limiting sliding block 60, a hand knob 61 and a return torsion spring 63.

[0139] The front frame 20 is provided with a drive shaft 200 for driving the main wheel 21 to rotate, and the drive shaft 200 is arranged in a spaced manner with the rotating shaft of the main wheel 21. The end of the drive shaft 200 is provided with a ratchet part 201 for connecting the crank 23.

[0140] The inside of the crank 23 is provided with an inner tooth ring 231 which is unidirectionally engaged with the ratchet part 201; and the outer wall of the crank 23 is provided with a stop block 232.

[0141] The return torsion spring 63 is mounted on the drive shaft 200, and one end of the return torsion spring 63 is connected with the crank 23. The return torsion spring 63 drives the crank 23 to rotate in the opposite direction of the engagement between the inner tooth ring 231 and the ratchet part 201, so that the crank 23 can be close to the rotating shaft of the main wheel 21.

[0142] The outer wall of the front frame 20 is provided with a sliding cavity, and a limiting sliding block 60 is slidably installed in the sliding cavity. One end of the limiting sliding block 60 is provided with a third return spring connected with the front frame 20, and the other end of the limiting sliding block 60 can extend out of the sliding cavity and is used for abutting against the stop block 232 to limit the reverse rotation of the crank 23 to the meshing direction of the inner tooth ring 231 and the ratchet wheel part 201. A hand knob 61 is connected with the limiting sliding block 60, and the hand knob 61 can drive the other end of the limiting sliding block 60 to be accommodated in the sliding cavity 202.

[0143] The crank 23 has a use state position and a storage state position. When the crank 23 is in the use state position, one end of the crank 23 provided with the pedal 25 is away from the main wheel 21, and the stop block 232 is limited by the limiting sliding block 60. When the crank 23 is in the storage state position, one end of the crank 23 provided with the pedal 25 is close to the main wheel 21, and the crank 23 is close to the rotating shaft of the main wheel 21.

[0144] Specifically, the sliding cavity is arranged at the top of the driving shaft 200, so that the limiting sliding block 60 is at the highest position and abuts against the stop block 232 of the crank 23, and the pedal 25 is at the farthest position from the ground when the crank 23 is in the use state position. Since the inner tooth ring 231 on the crank 23 and the ratchet wheel part 201 on the driving shaft 200 are in one-way meshing structure, when the user steps on the pedal 25, the inner tooth ring 231 meshes with the ratchet wheel part 201 to drive the driving shaft 200 to rotate, thereby providing power for the main wheel 21. When the user removes the force on the pedal 25, the crank 23 is driven to rotate towards the limiting sliding block 60 under the elastic force of the return torsion spring 63, and the stop block 232 abuts against the limiting sliding block 60 to limit the movement, so that the pedal 25 is at the highest position. The repeated movement provides power for the main wheel 21. Conversely, when the folding bicycle needs to be stored, after the pedal 25 is folded, the user controls the hand knob 61 to accommodate the limiting sliding block 60 in the sliding cavity. At this time, the crank 23 is not limited by the limiting sliding block 60 and rotates reversely to the position close to the rotating shaft of the main wheel 21, that is, the storage state position. Specifically, a rubber ring or the like structure for damping can be arranged on the rotating shaft of the main wheel 21 to avoid the damage of metal parts caused by the direct contact between the crank 23 and the rotating shaft of the main wheel 21. The sliding cavity and the third return spring are conventional structures, and the drawings of the embodiment do not show them.

[0145] In summary, when the folding bicycle is in the use state as shown in FIG. 1, the left handle 10 and the right handle 11 present a Y-shaped form with the first front vertical pipe 3, the pedal 25 of the crank 23 is at the highest position, and the axis of the pedal 25 is perpendicular to the rotating surface of the main wheel 21. Figure 1 Figure 2 ​In the shown storage state, the left handle 10 and the right handle 11 are in a position parallel to the first head vertical pipe 3, and the first head vertical pipe 3 and the second head vertical pipe 4 are folded to each other to surround the main wheel 21, the crank 23 is in a position abutting against the rubber ring 62, and the plate surface of the pedal 25 is parallel to the rotation surface of the main wheel 21.

[0146] Obviously, the above-described embodiments are only some embodiments of the present application, rather than 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 realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been 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 therein. Any equivalent structure made by using the content of the present application 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 two-wheeled vehicle, characterized by The utility model relates to a folding bicycle, which comprises a handle, a body group, a first front vertical pipe, a second front vertical pipe, a first connecting limiting piece, a second connecting limiting piece and a third connecting limiting piece. The handle comprises a left handle and a right handle. One end of the first front vertical pipe is provided with a handle joint, and the other end of the handle joint is used for mounting the left handle and the right handle respectively. One end of the second front vertical pipe is provided with a second connecting part which is hinged with the first connecting part, and the other end of the second front vertical pipe is provided with a third connecting part. The body group comprises a front frame, a rear frame, a main wheel and a rear wheel. One end of the rear frame is provided with a fifth connecting part which is hinged with the front frame, and the other end of the rear frame is provided with a rear wheel fork which is used for mounting the rear wheel. The first connecting limiting piece is mounted on the first front vertical pipe, and the first connecting limiting piece can be connected with the second front vertical pipe. The first front vertical pipe, the second front vertical pipe and the rear frame each have a use state position and a folding state position. When the first front vertical pipe, the second front vertical pipe and the rear frame are in the use state position, the first front vertical pipe and the second front vertical pipe are coaxially connected, the second front vertical pipe and the connecting pipe are coaxially connected, the first connecting limiting piece connects the first front vertical pipe and the second front vertical pipe, the second connecting limiting piece connects the second front vertical pipe and the connecting pipe, the rear wheel and the main wheel are distributed at intervals, and the third connecting limiting piece connects the front frame and the rear frame. When the first front vertical pipe and the second front vertical pipe are in the folding state position, the first front vertical pipe and the second front vertical pipe have an included angle α, the second front vertical pipe and the connecting pipe have an included angle β, the first connecting limiting piece is not connected with the second front vertical pipe, the second connecting limiting piece is not connected with the connecting pipe, the rear wheel and the main wheel are close to each other, and the third connecting limiting piece is not connected with the rear frame. The first connecting part comprises a first connecting wall and a first boss arranged on the first connecting wall.

2. The folding two-wheeled vehicle of claim 1, wherein, The second connecting part comprises a second connecting wall and a first groove arranged on the second connecting wall. The first boss is inserted into the first groove, and the first boss is hinged with the first groove through a rotating shaft. The first boss can be repeatedly rotated in and out of the first groove by turning over the first front vertical pipe. The third connecting part comprises a third connecting wall and a second boss arranged on the third connecting wall; the fourth connecting part comprises a fourth connecting wall and a second groove arranged on the fourth connecting wall, and the second groove is provided with a second opening in the radial direction of the second head vertical pipe; the second boss is inserted into the second groove, and the second boss is hinged with the second groove through a rotating shaft, and the second boss can be repeatedly rotated in and out of the first groove through the second opening by turning over the second head vertical pipe.

3. The folding two-wheeled vehicle of claim 2, wherein, The first connecting wall is an inclined end wall arranged at one end of the first head vertical pipe, and the second connecting wall is an inclined end wall arranged at one end of the first head vertical pipe; when the first head vertical pipe is in the use state position, the first connecting wall is attached to the second connecting wall; The third connecting wall is an inclined end wall arranged at the other end of the second head vertical pipe, and the fourth connecting wall is an inclined end wall arranged at one end of the connecting pipe; when the second head vertical pipe is in the use state position, the third connecting wall is attached to the fourth connecting wall; The first connecting limiting part and the second connecting limiting part are both threaded pipes provided with internal threads; The first head vertical pipe is provided with a first upper thread at a position close to the first connecting part, the second head vertical pipe is provided with a first lower thread at a position close to the second connecting part, the first connecting limiting part is sleeved on the first upper thread of the first head vertical pipe, and the first connecting limiting part can be connected with the first lower thread; The second head vertical pipe is provided with a second upper thread at a position close to the third connecting part, the connecting pipe is provided with a second lower thread at a position close to the fourth connecting part, the second connecting limiting part is sleeved on the second upper thread of the second head vertical pipe, and the second connecting limiting part can be connected with the second lower thread.

4. The folding two-wheeled vehicle of claim 1, wherein, The rear wheel fork comprises a rotating rod and a wheel fork, the rotating rod is rotatably installed at one end of the rear frame away from the fifth connecting part, and when the rear frame is in the use state position, the rotating rod is perpendicular to the ground; a side wall of the rotating rod is provided with a first magnet; the rear wheel is rotatably installed on the wheel fork, and an axis of the rear wheel is parallel to an axis of the rotating rod; An outer wall of the first head vertical pipe is provided with a second magnet which is adsorbed with the first magnet; when the rear frame is in the folding state position, the first magnet is attached to and adsorbed with the second magnet.

5. The folding two-wheeled vehicle of claim 1, wherein, The front frame is provided with spaced upper through holes and lower through holes, and the lower through holes are provided with mounting shafts; The fifth connecting part is two rotating cylinders, the two rotating cylinders are symmetrically installed at the end of the rear frame, and the rotating cylinders are rotatably connected with the mounting shafts; the end of the rear frame is further provided with two third limiting notches; The third connecting limiting part comprises a locking pull rod, a locking nut, a locking block, a pull rod connecting shaft, a quick release wrench, a first return spring and a second return spring; wherein, One end of the locking pull rod is sequentially penetrated through the locking block and the upper through hole and then fixedly connected with the locking nut, the other end of the locking pull rod is hinged with the quick release wrench through the pull rod connecting shaft; the locking nut is spaced apart from the side wall of the front frame and forms a first clamping position, and the locking block is spaced apart from the side wall of the front frame and forms a second clamping position. The first return spring and the second return spring are sleeved on the locking pull rod, the first return spring connects the locking nut and the side wall of the front frame, and the second return spring connects the locking block and the side wall of the front frame; When the rear frame is in the use state position, the two third limiting notches of the rear frame are respectively clamped into the first clamping position and the second clamping position, and the rear frame is pressed on the front frame through the locking nut and the locking block; when the rear frame is in the folded state position, the two third limiting notches of the rear frame are separated from the first clamping position and the second clamping position.

6. The folding two-wheeled vehicle of claim 1, wherein, Both ends of the handle joint are provided with a connecting port, the connecting port has a first clamping position and a second clamping position, the left handle and the right handle are both provided with a connecting head which is threadedly connected with the connecting port; the left handle and the right handle can rotate around the connecting port with the axis of the connecting port as the central axis, and the connecting head can be clamped in the first clamping position and the second clamping position respectively; The left handle and the right handle both have a use state position and a folded 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 first front vertical pipe are in the shape of "Y" as a whole, and the connecting head is clamped in the first clamping position; when the left handle and the right handle are both in the folded state position, the left handle and the right handle are both parallel to the first front vertical pipe as a whole, and the connecting head is clamped in the second clamping position.

7. The folding two-wheeled vehicle of claim 6, wherein, The handle further comprises two sets of limiting assemblies for connecting the connecting port and the connecting head, and the limiting assembly comprises a limiting ring, a limiting screw and a first return spring; The side wall of the connecting head is provided with a pair of guide holes which pass through from one side to the opposite side, the guide holes are strip-shaped holes which extend along the axial direction of the connecting head; the first clamping position is a pair of first limiting notches in the side wall of the connecting port, and the second clamping position is a pair of second limiting notches in the side wall of the connecting port; the inside of the connecting head is provided with a limiting hook; The limiting screw passes through the guide hole from one side of the limiting ring to the other side of the limiting ring, one end of the first return spring is connected with the limiting hook, and the other end of the first return spring is connected with the limiting screw; when the limiting ring moves along the axial direction of the connecting head, the limiting screw moves along the length direction of the guide hole and limits the circumferential rotation of the limiting ring relative to the connecting head; When the left handle and the right handle are both in the use state position, the guide holes correspond to the first limiting notches, and the limiting screw is clamped in the first limiting notches; when the left handle and the right handle are both in the folded state position, the guide holes correspond to the second limiting notches, and the limiting screw is clamped in the second limiting notches; pulling the limiting ring can make the limiting ring away from the connecting port, and the limiting screw is separated from the first limiting notches or the second limiting notches.

8. The folding two-wheeled vehicle of claim 1, wherein, The body group further comprises two sets of foot pedal assemblies for driving the main wheels to rotate, and the two sets of foot pedal assemblies are symmetrically installed on the front frame; the foot pedal assembly comprises a crank, a limiting mechanism, a pedal, a first guide pipe and a second guide pipe which are in communication with each other. One end of the crank is connected to the front frame for driving rotation of the main wheel, the other end of the crank is provided with a connecting column, the connecting column is provided with a limiting hole, and the outer wall of the connecting column is further provided with a locking plane; One end of the second guide pipe is fixed to the side wall of the first guide pipe, and the first guide pipe is rotatably sleeved on the connecting column; The pedal is provided with a connecting rod, the end of the connecting rod is mutually attached to the locking plane and magnetically adsorbed; the connecting rod is coaxially installed in the second guide pipe, and the connecting rod can slide along the axial direction of the second guide pipe; pulling the connecting rod can make the pedal have a supporting state and a folding state; when the pedal is in the supporting state, the end of the connecting rod is inserted into the limiting hole of the connecting column; when the pedal is in the folding state, the connecting rod is separated from the limiting hole, and the end of the connecting rod is attached to the locking plane. The limiting mechanism is installed on the second guide pipe, and the axial displacement of the connecting rod in the second guide pipe can be limited by the limiting mechanism.

9. The folding two-wheeled vehicle of claim 8, wherein, The limiting mechanism comprises a ball, a sleeve, a second reset spring and a fixing ring; the fixing ring is coaxially installed at the end of the second guide pipe away from the first guide pipe; the pipe wall of the second guide pipe is provided with a mounting through hole; The second reset spring is sleeved on the outer wall of the second guide pipe, one end of the reset spring abuts against the fixing ring, and the other end of the reset spring is used for connecting the sleeve; The sleeve is slidably sleeved on the second guide pipe, and the inner wall of the sleeve is provided with a ring step for abutting against the second reset spring; the inner wall of the sleeve is further provided with an avoiding groove; sliding the sleeve can make the avoiding groove of the sleeve connect the mounting through hole; The outer wall of the connecting rod is provided with a limiting groove; pulling the connecting rod can make the limiting groove connect the mounting through hole; The ball is installed in the mounting through hole, and the diameter of the ball is greater than the thickness of the pipe wall of the second guide pipe; the ball has a locking position and an unlocking position; when the ball is in the locking position, the inner side of the ball is embedded in the limiting groove, and the outer side of the ball abuts against the inner wall of the sleeve; when the ball is in the unlocking position, the inner side of the ball abuts against the outer wall of the connecting rod, and the outer side of the ball is embedded in the avoiding groove.

10. The folding two-wheeled vehicle of claim 8, wherein, The foot pedal assembly further comprises a limiting sliding block, a hand dial and a reset torsion spring; The front frame is provided with a driving shaft for driving rotation of the main wheel, the driving shaft is arranged in a spaced manner with the rotating shaft of the main wheel, and the end of the driving shaft is provided with a ratchet part for connecting the crank; The inside of the crank is provided with an inner tooth ring in one-way engagement with the ratchet part; the outer wall of the crank is provided with a stop block; The reset torsion spring is installed on the driving shaft, one end of the reset torsion spring is connected to the crank, and the reset torsion spring drives the crank to rotate in the opposite direction of the engagement between the inner tooth ring and the ratchet part; the crank can be close to the rotating shaft of the main wheel; The outer wall of the front frame is provided with a sliding cavity, the limiting sliding block is slidably installed in the sliding cavity, one end of the limiting sliding block is provided with a third return spring connected with the front frame, the other end of the limiting sliding block can extend out of the sliding cavity, and the other end of the limiting sliding block is used for abutting against the stop block and limiting reverse rotation of the crank to the meshing direction of the inner tooth ring and the ratchet wheel part; the hand knob is connected with the limiting sliding block, and the hand knob can drive the other end of the limiting sliding block to be accommodated in the sliding cavity. The crank has a use state position and a storage state position, when the crank is in the use state position, one end of the crank provided with the pedal is away from the main wheel, and the stop block is limited by the limiting sliding block; when the crank is in the storage state position, one end of the crank provided with the pedal is close to the main wheel, and the crank is close to the rotating shaft of the main wheel.

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