Folding monocycle

Abstract

The utility model relates to the technical field of bicycles, and particularly discloses a folding wheelbarrow which comprises a handle, a wheelbarrow body set, a first wheelbarrow head vertical pipe, a second wheelbarrow head vertical pipe, a first connecting limiting piece and a second connecting limiting piece. The handle comprises a left handle and a right handle; the first bicycle head vertical pipe is provided with a handle connector, and the two ends of the handle connector are used for installing a left handle and a right handle respectively. 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 hinged to the first connecting part, and the second bicycle head vertical pipe is provided with a third connecting part; a connecting pipe is arranged on the wheel frame, and a fourth connecting part hinged to the third connecting part is arranged on the connecting pipe; the first connection limiting piece is installed on the first bicycle head vertical pipe and can be connected with the second bicycle head vertical pipe. The second connecting limiting piece is mounted on the second bicycle head vertical pipe and can be connected with the connecting pipe; the first bicycle head vertical pipe and the second bicycle head vertical pipe 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 unicycle. BACKGROUND

[0002] Using bicycle is a common way of people, and when riding to the subway station or bus station to change the subway or bus, the current bicycle is inconvenient for users to carry into the subway or bus due to the large body, and is directly placed near the subway station or bus station, which has the problems of storage and theft prevention, therefore, people hope to have a bicycle or electric bicycle that can be carried, and how to miniaturize the bicycle and fold the body becomes a problem to be solved. SUMMARY

[0003] Therefore, the utility model provides a folding unicycle to solve the technical problems in the background.

[0004] In order to achieve one or part or all of the above purposes or other purposes, the utility model provides a folding unicycle, which comprises a handle, a body group, a first head vertical pipe, a second head vertical pipe, a first connecting limiting piece and a second connecting limiting piece.

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

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

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

[0008] The body group comprises a wheel frame and a wheel, and the wheel is rotatably installed on the wheel frame.

[0009] The first connecting limiting piece is installed on the first head vertical pipe, and the first connecting limiting piece can be connected with the second head vertical pipe.

[0010] The first head vertical pipe and the second head vertical pipe both have a use state position and a folding state position.

[0011] When the first and second front vertical pipes are in the use state position, the first front vertical pipe is coaxially connected with the second front vertical pipe, the second front vertical pipe is coaxially connected with the connecting pipe, and the first connecting limiting piece connects the first and second front vertical pipes and the second connecting limiting piece connects the second front vertical pipe and the connecting pipe;

[0012] When the first and second front vertical pipes are in the folded state position, the first front vertical pipe has an included angle a with the second front vertical pipe, the second front vertical pipe has an included angle β with the connecting pipe, and the first connecting limiting piece is not connected with the second front vertical pipe and the second connecting limiting piece is not connected with the connecting pipe.

[0013] Preferably, the first connecting part comprises a first connecting wall and a first boss arranged on the first connecting wall; the second connecting part comprises a second connecting wall and a first groove arranged on the second connecting wall, and the first groove is 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 with 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;

[0014] 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 front 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 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.

[0015] Preferably, the first connecting wall is an inclined end wall arranged at one end of the first front vertical pipe, and the second connecting wall is an inclined end wall arranged 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 contact with the second connecting wall;

[0016] The third connecting wall is an inclined end wall arranged at the other end of the second front vertical pipe, and the fourth connecting wall is an inclined end wall arranged 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 contact with the fourth connecting wall.

[0017] Preferably, the first and second connecting limiting pieces are both threaded pipes provided with internal threads;

[0018] The first front vertical pipe is provided with a first upper thread at a position close to the first connecting part, the second front vertical pipe is provided with a first lower thread at a position close to the second connecting part, the first connecting limiting piece is sleeved on the first upper thread of the first front vertical pipe, and the first connecting limiting piece can be connected with the first lower thread;

[0019] The second upper thread is arranged on the second head vertical pipe near the third connecting part, the second lower thread is arranged on the connecting pipe near the fourth connecting part, and the second connecting limiting part is sleeved on the second upper thread of the second head vertical pipe and connected with the second lower thread.

[0020] Preferably, the first connecting wall is provided with a first through hole connecting the internal cavity of the first head vertical pipe; the second connecting wall is provided with a second through hole connecting the internal cavity of the second head vertical pipe; the third connecting wall is provided with a third through hole connecting the internal cavity of the second head vertical pipe; and the fourth connecting wall is provided with a fourth through hole connecting the internal cavity of the connecting pipe.

[0021] Preferably, both ends of the handle joint are provided with connecting ports having first and second clamping positions, and the left handle and the right handle are respectively provided with connecting heads threadedly connected with the connecting ports; the left handle and the right handle can rotate around the connecting ports with the axis of the connecting port as the center axis, and the connecting heads can be respectively clamped in the first and second clamping positions.

[0022] The left handle and the right handle each have a use state position and a folding state position; when the left handle and the right handle are in the use state position, the left handle, the right handle and the first head vertical pipe are in a "Y" shape as a whole, and the connecting head is clamped in the first clamping position; when the left handle and the right handle are in the folding state position, the left handle and the right handle are parallel to the first head vertical pipe as a whole, and the connecting head is clamped in the second clamping position.

[0023] 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.

[0024] A pair of guide holes passing through one side to the opposite side are arranged 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, and the second clamping position is a pair of second limiting notches on the side wall of the connecting port; and the internal cavity of the connecting head is provided with a limiting hook.

[0025] 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 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.

[0026] When the left handle and the right handle are in the use state position, the guide hole corresponds to the first limiting notch, and the limiting screw is clamped on the first limiting notch; when the left handle and the right handle are in the folding state position, the guide hole corresponds to the second limiting notch, and the limiting screw is clamped on the second limiting notch; pulling the limiting ring can make the limiting ring away from the connecting port, and the limiting screw is separated from the first limiting notch or the second limiting notch.

[0027] Preferably, the vehicle body group further comprises two sets of foot pedal assemblies for driving the wheels to rotate, and the two sets of foot pedal assemblies are symmetrically installed on the wheel frame; the foot pedal assembly comprises a crank, a limiting mechanism, a pedal, a first guide pipe and a second guide pipe in communication with each other;

[0028] One end of the crank is connected to the wheel frame for driving the wheels to rotate, 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;

[0029] 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;

[0030] The pedal is provided with a connecting rod, the end of the connecting rod can be 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;

[0031] 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.

[0032] Preferably, the limiting mechanism comprises a ball, a sleeve, a second return spring and a fixing ring; the fixing ring is coaxially installed at one 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;

[0033] The second return spring is sleeved on the outer wall of the second guide pipe, one end of the return spring abuts against the fixing ring, and the other end of the return spring is used for connecting the sleeve;

[0034] 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 the second return 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;

[0035] 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;

[0036] 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.

[0037] Preferably, the pedal assembly further comprises a limiting sliding block, a hand knob, a rubber ring and a reset torsion spring.

[0038] The rubber ring is fixed to the end of the rotating shaft of the wheel.

[0039] The wheel frame is provided with a driving shaft for driving the wheel to rotate, the driving shaft is arranged at intervals with the rotating shaft of the wheel, and the end of the driving shaft is provided with a ratchet part for connecting the crank.

[0040] The inside of the crank is provided with an inner tooth ring which is unidirectionally engaged with the ratchet part, and the outer wall of the crank is provided with a stopper.

[0041] The reset torsion spring is mounted on the driving shaft, one end of the reset torsion spring is connected with 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, and the crank can abut against the rubber ring.

[0042] The outer wall of the wheel 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 wheel 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 direction of the engagement between 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.

[0043] The crank has a use state position and a storage state position; when the crank is in the use state position, the end of the crank provided with the pedal is away from the wheel, and the stopper is limited by the limiting sliding block; when the crank is in the storage state position, the end of the crank provided with the pedal is close to the wheel, and the crank abuts against the rubber ring.

[0044] The embodiment of the utility model is implemented, and the following beneficial effects are achieved:

[0045] After the above scheme is adopted, the folding unicycle is of a unicycle structure, and occupies a smaller space and is convenient to carry. In order to take into account the riding use of the user, the first head vertical pipe and the second head vertical pipe are hingedly connected, and the connecting pipe on the wheel frame and the second head vertical pipe are hingedly connected, so that the first head vertical pipe and the second head vertical pipe 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 and the second connecting limiting piece are installed on the first head vertical pipe and the second head vertical pipe to keep the use state position of the first head vertical pipe and the second head vertical pipe, and ensure the stability of the folding unicycle when in use. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0047] Among them:

[0048] Figure 1 The overall structure of the embodiment Figure 1 ;

[0049] Figure 2 The overall structure of the embodiment Figure 2 ;

[0050] Figure 3 The overall structure of the embodiment Figure 1 ;

[0051] Figure 4 The overall structure of the embodiment Figure 2 ;

[0052] Figure 5 is the A-A sectional view in Figure 3 ;

[0053] Figure 6 The overall structure of the embodiment

[0054] Figure 7 is the B-B sectional view in Figure 3 ;

[0055] Figure 8 is the C part enlarged view in Figure 3 ;

[0056] Figure 9 is the D part enlarged view in Figure 5 ;

[0057] Figure 10 is an enlarged view of part E in Figure 6

[0058] Figure 11 is an enlarged view of part F in Figure 6

[0059] Figure 12 is an exploded view of the pedal assembly of the present embodiment;

[0060] Figure 13 is a sectional view of the pedal assembly in the present embodiment;

[0061] Figure 14 is a structural schematic view of the first guide pipe and the second guide pipe in the present embodiment;

[0062] Figure 15 is a structural schematic view of the sleeve in the present embodiment.

[0063] Reference signs:

[0064] 10, right handle; 11, left handle; 12, connector; 120, guide hole; 121, limiting hook; 13, limiting ring; 14, limiting screw; 15, first return spring;

[0065] 2, vehicle body assembly; 20, wheel frame; 200, drive shaft; 201, ratchet part; 21, wheel; 22, connecting pipe; 220, fourth connecting part; 221, fourth connecting wall; 222, second groove; 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 groove; 26, first guide pipe; 27, second guide pipe; 270, mounting through hole;

[0066] 3, first head vertical pipe; 30, handle connector; 300, connecting port; 301, first clamping position; 301a, first limiting notch; 302, second clamping position; 302a, second limiting notch; 31, first connecting part; 310, first connecting wall; 311, first boss; 32, first upper thread;

[0067] 4, second head vertical pipe; 40, second connecting part; 400, second connecting wall; 401, first groove; 401a, first opening; 41, third connecting part; 410, third connecting wall; 411, second boss; 42, first lower thread; 43, second upper thread;​​

[0068] 51, first connecting limiting member; 52, second connecting limiting member;

[0069] 60, limiting sliding block; 61, hand push; 62, rubber ring; 63, reset torsional spring. DETAILED DESCRIPTION

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the application will be described with reference to the drawings in which is shown by way of illustration the application in accordance with embodiments described herein. The drawings are for purposes of illustrating the embodiments of the application and are not to be construed as limiting the application.

[0071] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0072] In order to make the technical personnel of the present technology better understand the application scheme, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings.

[0073] As shown in the accompanying drawings Figures 1-15 The application embodiment provides a folding wheelbarrow, which comprises a handle, a body group 2, a first wheel head vertical pipe 3, a second wheel head vertical pipe 4, a first connecting limiting member 51 and a second connecting limiting member 52; the handle comprises a left handle 11 and a right handle 10.

[0074] One end of the first wheel head vertical pipe 3 is provided with a handle joint 30, and the two ends of the handle joint 30 are respectively used for installing the left handle 11 and the right handle 10; the other end of the first wheel head vertical pipe 3 is provided with a first connecting part 31.

[0075] One end of the second wheel head vertical pipe 4 is provided with a second connecting part 40 which is hinged with the first connecting part 31, and the other end of the second wheel head vertical pipe 4 is provided with a third connecting part 41.

[0076] The vehicle body set 2 comprises a wheel frame 20 and a wheel 21 rotatably mounted on the wheel frame 20, and the wheel frame 20 is provided with a connecting pipe 22, and the connecting pipe 22 is provided with a fourth connecting part 220 hingedly connected with the third connecting part 41;

[0077] The first connecting limiting part 51 is mounted on the first head vertical pipe 3, and the first connecting limiting part 51 is connectable with the second head vertical pipe 4; and the second connecting limiting part 52 is mounted on the second head vertical pipe 4, and the second connecting limiting part 52 is connectable with the connecting pipe 22;

[0078] The first head vertical pipe 3 and the second head vertical pipe 4 each have a use state position and a folding state position;

[0079] When the first head vertical pipe 3 and the second head vertical pipe 4 are in the use state position, the first head vertical pipe 3 is coaxially butted with the second head vertical pipe 4, the second head vertical pipe 4 is coaxially butted with the connecting pipe 22, and the first connecting limiting part 51 connects the first head vertical pipe 3 and the second head vertical pipe 4, and the second connecting limiting part 52 connects the second head vertical pipe 4 and the connecting pipe 22;

[0080] When the first head vertical pipe 3 and the second head vertical pipe 4 are in the folding state position, the first head vertical pipe 3 and the second head vertical pipe 4 have an included angle α, the second head vertical pipe 4 and the connecting pipe 22 have an included angle β, and the first connecting limiting part 51 is not connected with the second head vertical pipe 4, and the second connecting limiting part 52 is not connected with the connecting pipe 22.

[0081] Specifically, the first handle vertical pipe 3, the second handle vertical pipe 4 and the handle are all tubular structures with internal through, wherein the handle joint 30 on the first handle vertical pipe 3 connects the internal cavity of the first handle vertical pipe 3, so that after the left handle 11 and the right handle 10 are installed on the handle joint 30, the oil pipes or other wires of the brake control members and the gear control members on the left handle 11 and the right handle 10 can be connected to the bottom vehicle body group 2 through the internal cavity, so that the folding unicycle does not have too many exposed wires, etc., improving the appearance neatness of the folding unicycle, and also facilitating the subsequent folding storage or unfolding support use of the first handle vertical pipe 3 and the second handle vertical pipe 4; the first embodiment specifically sets the first connecting part 31 and the second connecting part 40 with the same structure at the bottom end of the first handle vertical pipe 3 and the second handle vertical pipe 4 respectively, and sets the second connecting part 40 and the fourth connecting part 220 with the same structure at the top end of the second handle vertical pipe 4 and the connecting pipe 22 respectively, through the hinge connection of the first connecting part 31 and the second connecting part 40, so that the first handle vertical pipe 3 can be folded by turning over, so that when the first handle vertical pipe 3 and the second handle vertical pipe 4 are in the folded state position, there is an included angle α between them, and the included angle α of the embodiment is less than 60 degrees, similarly, the same hinge structure is adopted between the second handle vertical pipe 4 and the connecting pipe 22, realizing the turning over and folding of the second handle vertical pipe 4 compared with the connecting pipe 22, and the included angle β between the second handle 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 handle vertical pipe 3 and the second handle vertical pipe 4 in the folded state position have smaller external extension length, thereby reducing the occupied space of the folding unicycle when it is stored; specifically, the connecting pipe 22 is arranged at the top of the wheel frame 20, that is, the position of the connecting pipe 22 and the position of the rotating shaft of the wheel 21 are spaced apart from each other, so that when the first handle vertical pipe 3 and the second handle vertical pipe 4 are in the folded state position, the first handle vertical pipe 3 and the second handle vertical pipe 4 present a form of surrounding the wheel 21, thereby realizing the miniaturization of the folding unicycle when it needs to be stored, facilitating the user to carry the folding unicycle.

[0082] In order to further improve the stability of the first front vertical pipe 3 and the second front vertical pipe 4 in the folded state position, a strap with a magic tape can also be arranged at the corresponding position of the wheel frame 20, so as to improve the firmness of the folding unicycle when carrying. In order to improve the stability of the folding unicycle when in use, the first connecting limiting piece 51 and the second connecting limiting piece 52 are respectively arranged between the first front vertical pipe 3 and the second front vertical pipe 4 and between the second front vertical pipe 4 and the connecting pipe 22. The first connecting limiting piece 51 and the second connecting limiting piece 52 in the embodiment have the same structure, the first connecting limiting piece 51 is used to limit the hinge between the first front vertical pipe 3 and the second front vertical pipe 4, improve the structural stability of the first front vertical pipe 3 in the use state position, avoid unnecessary hinge turning when the user rides, for example, a threaded hole extending in the axial direction can be arranged on the first connecting part 31 and the second connecting part 40, when the first front vertical pipe 3 and the second front vertical pipe 4 are coaxially connected, the threaded holes on the first connecting part 31 and the second connecting part 40 are connected by a fastening bolt, and then the first front vertical pipe 3 is kept in the use state position; the same connecting structure is used between the second front vertical pipe 4 and the connecting pipe 22 as between the first front vertical pipe 3 and the second front vertical pipe 4, which will not be described here.

[0083] It should also be noted that the wheel 21 and the wheel frame 20 are in two vertical planes that are staggered with each other as shown in the accompanying drawings. Figure 3 The first front vertical pipe 3 and the second front vertical pipe 4 are turned in the vertical plane where the wheel frame 20 is located, so that the first front vertical pipe 3 and the second front vertical pipe 4 in the folded state position are in the position where the wheels 21 are stacked with each other, further reducing the space occupied by the folding unicycle.

[0084] In summary, the folding unicycle has a unicycle structure, occupies a small space itself, and is convenient to carry. In order to take into account the user's riding use, the first front vertical pipe 3 and the second front vertical pipe 4 are hingedly connected, and the second front vertical pipe 4 and the connecting pipe 22 on the wheel frame 20 are hingedly connected, so that the first front vertical pipe 3 and the second front vertical pipe 4 both have a folded state position, so as to facilitate storage and carrying, have the advantages of miniaturization and light weight when carrying, and the first connecting limiting piece 51 and the second connecting limiting piece 52 are arranged on the first front vertical pipe 3 and the second front vertical pipe 4 to keep the use state position of the first front vertical pipe 3 and the second front vertical pipe 4, ensuring the stability of the folding unicycle when in use.

[0085] Referring to the accompanying 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, 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 hinged with the first recess 401 through a rotating shaft, and the first head vertical pipe 3 can be turned over to make the first boss 311 repeatedly rotate in and out of the first recess 401 through the first opening 401a;

[0086] 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, 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 hinged with the second recess 222 through a rotating shaft, and the second head vertical pipe 4 can be turned over to make the second boss 411 repeatedly rotate in and out of the first recess 401 through the second opening 222a.

[0087] Specifically, a rotating shaft can be arranged between the first boss 311 and the first recess 401 to 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 recess 401, so that the first head vertical pipe 3 can be turned over in the direction of the first opening 401a; in the 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 recess 401, and 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 recess 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 friction between the end of the first boss 311 and the bottom wall of the first recess 401 needs to be overcome to realize the conversion; the structure design can improve the structural stability of the first head vertical pipe 3 in the folded state position, and further, the bottom wall of the first recess 401 can be arranged as an inclined wall structure in actual production, that is, the bottom wall of the first recess 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 position is larger. Similarly, the second head vertical pipe 4 and the connecting pipe 22 are in the same situation when they are converted from the use state position to the folded state position, and details are not repeated here.

[0088] In order to ensure that the first head vertical pipe 3 only turns to the first opening 401a direction, the second head vertical pipe 4 only turns to the second opening 222a direction, and improve the structural stability of the folding unicycle, the first connecting wall 310 is an inclined end wall opened at one end of the first head vertical pipe 3, and the second connecting wall 400 is an inclined end wall opened 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 attached to the second connecting wall 400.

[0089] The third connecting wall 410 is an inclined end wall opened at the other end of the second head vertical pipe 4, and the fourth connecting wall 221 is an inclined end wall opened 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 attached to the fourth connecting wall 221.

[0090] 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 turns away from the first opening 401a, the first connecting wall 310 is attached to the second connecting wall 400 and cannot be turned, thereby achieving the limiting effect, and at this time, the first head vertical pipe 3 is in the coaxial butt joint position with 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 use state position, and will not be described again.

[0091] In order to connect the oil pipe or other wire of the corresponding control structure of the left handle 11 and the right handle 10 to the inside of the vehicle body group 2, the first connecting wall 310 of the embodiment 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 pipe 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 wheel frame 20 to connect with the corresponding control structure, realizing the internal wiring arrangement of the folding unicycle. Specifically, the length of the oil pipe and other wires can be reserved to ensure that the oil pipe 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 embodiment.

[0092] In order to improve the stability of the first head vertical pipe 3 and the second head vertical pipe 4 in the use state position, and the user's adjustment convenience, the first connecting limiting member 51 and the second connecting limiting member 52 are both threaded pipes provided with internal threads.

[0093] The first upper thread 32 is arranged on the first head vertical pipe 3 near the first connecting part 31, the first lower thread 42 is arranged on the second head vertical pipe 4 near the second connecting part 40, the first connecting limiting part 51 is sleeved on the first upper thread 32 of the first head vertical pipe 3, and the first connecting limiting part 51 can be connected with the first lower thread 42;

[0094] The second upper thread 43 is arranged on the second head vertical pipe 4 near the third connecting part 41, the second lower thread 223 is arranged on the connecting pipe 22 near the fourth connecting part 220, the second connecting limiting part 52 is sleeved on the second upper thread 43 of the second head vertical pipe 4, and the second connecting limiting part 52 can be connected with the second lower thread 223.

[0095] 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 is connected with the first upper thread 32 and the first lower thread 42 at the same time, the first connecting part 31 and 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 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 direction close to the handle joint 30, that is, the threaded connection between 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 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 facilitates the user to realize quick adjustment by manual rotation, and facilitates the user to switch different use modes of the folding wheelbarrow. Similarly, the same structure is adopted between the second head vertical pipe 4 and the connecting pipe 22, and details are not repeated.

[0096] 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, the left handle 11 and the right handle 10 are provided with a connecting head 12 which is threadedly connected with the connecting port 300; the left handle 11 and the right handle 10 can respectively 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 respectively clamped in the first clamping position 301 and the second clamping position 302;

[0097] The left handle 11 and the right handle 10 each have a use state position and a folding state position; when the left handle 11 and the right handle 10 are each in the use state position, the left handle 11, the right handle 10 and the first head vertical pipe 3 are in the shape of "Y" as a whole, and the connecting head 12 is clamped in the first clamping position 301; when the left handle 11 and the right handle 10 are each in the folding state position, the left handle 11 and the right handle 10 are each parallel to the first head vertical pipe 3 as a whole, and the connecting head 12 is clamped in the second clamping position 302.

[0098] In the embodiment, the left handle 11 and the right handle 10 are each in the shape of a long strip, and the left handle 11 and the right handle 10 are each designed to be close to a straight line as a whole for the purpose of folding storage, and some bending with some radius or small radius can be arranged according to the need, for example, in some embodiments in which the handle is relatively small, the left handle 11 and the right handle 10 are each provided with a bending with a length ratio of not more than 35% of the whole and a radius of not more than 35°, so that the opening angle of the left handle 11 and the right handle 10 as a whole is larger in the use state, that is, the opening angle of the "Y" shape is larger, and the force arm of the handle to control the head is longer, so that the handle is easier to control and more in line with ergonomics.

[0099] In the embodiment, the use state position and the folding state position of the left handle 11 or the right handle 10 refer to two fixed positions of the left handle 11 and the right handle 10, and the use state position corresponds to the position of the left handle 11 and the right handle 10 in the riding state, and the folding state position corresponds to the position of the left handle 11 and the right handle 10 in the folding storage state. Specifically, the connecting head 12 and the connecting port 300 are preferably connected by threads to improve the connection stability of the left handle 11 or the right handle 10 and the handle joint 30, and when the left handle 11 and the right handle 10 are each in the use state position, the rotation position of the left handle 11 can be limited by a limiting structure such as a screw from the side wall through the connecting head 12 and the connecting port 300 in turn, at this time, the first clamping position 301, that is, the position at which the screw hole on the connecting head 12 and the screw hole on the connecting port 300 are aligned, is clamped by the screw after limiting, and the left handle 11 cannot be rotated any more, that is, the left handle 11 is fixed in the use state position, and similarly, the right handle 10 is fixed in the use state position in the same way, which will not be described herein again.

[0100] Referring to the drawings Figure 10 The handle further comprises two sets of limiting assemblies for connecting the connecting port 300 and the connecting head 12, and each limiting assembly comprises a limiting ring 13, a limiting screw 14 and a first return spring 15.

[0101] The side wall of the connecting head 12 is provided with a pair of guide holes 120 passing from one side to the other side, the guide holes 120 are strip-shaped holes extending along the axial direction of the connecting head 12; the first clamping position 301 is a pair of first limiting notches 301a on the side wall of the connecting port 300, the second clamping position 302 is a pair of second limiting notches 302a on the side wall of the connecting port 300; the inside of the connecting head 12 is provided with a limiting hook 121;

[0102] 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;

[0103] When the left handle 11 and the right handle 10 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 11 and the right handle 10 are both in the folding 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.

[0104] In the embodiment, the left handle 11 is taken as an example for illustration: the guide hole 120 is a pair of openings with the axis of the first joint as the symmetry axis, and 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. The limiting screw 14 can be moved left and right in the guide hole 120 by external force, for example, by the user with his hand. When it is necessary to fix the left handle 11 in the use state position, it is only needed to insert the connecting head 12 of the left handle 11 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 gap 301a is aligned with the first limiting gap 301a, and then the limiting screw 14 is pulled to the first limiting gap 301a for clamping. In this way, the left handle 11 is fixed. It is worth mentioning that the limiting screw 14 can be connected with the limiting gap by interference fit, and in addition, the connection can be assisted by a spring as described in subsequent embodiments. When disassembling, it is only needed to pull out the limiting screw 14 from the first limiting gap 301a, and the left handle 11 can be rotated and stored. The fixing of the right handle 10 in the folding state position is similar to the above principle and will not be described herein again. Similarly, the fixing and disassembling principles of the right handle 10 in the use state position and the folding state position are similar to those of the left handle 11 and will not be described herein again. In addition, the first limiting gap 301a and the second limiting gap 302a can be arranged adjacent to each other, that is, the second limiting gap 302a is beside the first limiting gap 301a. Specifically, as shown in the accompanying drawings, in this case, the use state position of the left handle 11 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. The inclination effect can be as shown in the accompanying drawings. Figure 10 Figure 3

[0105] In the embodiment, the left handle 11 is taken as an example for illustration, and the right handle 10 is symmetrical to the left handle 11 and 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. The limiting hook 121 is arranged inside the connecting head 12 and close to the opening of the connecting head 12. The guide hole 120 is arranged inside the connecting head 12 close to the limiting hook 121. In this way, when the first return spring 15 is connected to the limiting hook 121 at one end and to the limiting screw 14 at the other end, the first return 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 connecting, the limiting hook 121 is inside the first limiting gap 301a, that is, a pulling force is always generated to clamp the limiting screw 14 on the first limiting gap 301a, preventing the first limiting screw 14 from disengaging from the first limiting gap 301a. The connection of the limiting screw 14 to the second limiting gap 302a is similar to the above and will not be described herein again. ​​

[0106] Referring to the drawings Figure 6 The vehicle body assembly 2 further comprises two sets of foot pedal assemblies for driving the wheels 21 to rotate, and the two sets of foot pedal assemblies are symmetrically arranged on the wheel frame 20; the foot 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.

[0107] One end of the crank 23 is connected to the wheel frame 20 for driving the 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;

[0108] 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;

[0109] The pedal 25 is provided with a connecting rod 250, the end of the connecting rod 250 is capable of being in close contact with and magnetically adsorbed to the locking plane 230b; the connecting rod 250 is coaxially arranged in the second guide pipe 27, and the connecting rod 250 is capable of sliding 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 in close contact with the locking plane 230b;

[0110] The limiting mechanism 24 is arranged 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.

[0111] 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, which is a common tee structure, 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, in the supporting state, the pedal 25 is crossed with the crank 23, limiting the relative rotation of the first guide pipe 26 on the connecting column 230, so that the pedal 25 can form stable support for the user's foot, at this time, the user can drive the crank 23 to rotate by stepping on the pedal 25, to provide power for the wheel 21; in the folding state, the pedal 25 is stored in the second guide pipe 27, and the first guide pipe 26 is not limited in the radial direction by the connecting rod 250, and can be rotated around the limiting column, at this time, the user can turn over the pedal 25 to the position close to the wheel frame 20, to facilitate storage or carrying.

[0112] 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 near the opening of the second guide pipe 27, to facilitate the insertion of the connecting rod 250 into the limiting hole 230a. In the embodiment, the limiting mechanism 24 is installed at the second guide pipe 27 and connected with the connecting rod 250, so that the connecting rod 250 is in the position inserted into the limiting hole 230a in the normal state, 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.

[0113] 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 wheel support 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 unicycle, 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.

[0114] 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 wall of the second guide pipe 27 is provided with an installation 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.

[0115] 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 installation 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 installation through hole 270.

[0116] 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.

[0117] 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, the user pulls the connecting rod 250 by force, the outer wall of the connecting rod 250 forces the ball 240 to embed outwardly into the avoiding groove 241b, and the connecting rod 250 can slide away from the limiting hole 230a without being limited by the ball 240; in the 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.

[0118] 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 wheel 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

[0119] In use, the pedal of the pedal assembly is in a higher position away from the wheel 21, which facilitates the user to continuously and repeatedly step on the pedal to drive the wheel 21 to rotate, and when the folding unicycle needs to be stored, the longer extension structure is not conducive to the storage of the folding unicycle. 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, a rubber ring 62 and a return torsion spring 63; the rubber ring 62 is fixed to the end of the rotating shaft of the wheel 21;

[0120] The wheel frame 20 is provided with a drive shaft 200 for driving the wheel 21 to rotate, the drive shaft 200 is arranged in a spaced manner with the rotating shaft of the wheel 21, and the end of the drive shaft 200 is provided with a ratchet part 201 for connecting the crank 23;

[0121] The inside of the crank 23 is provided with an inner tooth ring 231 which is unidirectionally engaged with the ratchet part 201; the outer wall of the crank 23 is provided with a stop block 232;

[0122] 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 of the inner tooth ring 231 and the ratchet part 201, and the crank 23 can abut against the rubber ring 62;

[0123] The outer wall of the wheel frame 20 is provided with a sliding cavity, and the 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 wheel 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. The 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.

[0124] 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 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 wheel 21, and the crank 23 abuts against the rubber ring 62.

[0125] 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 a 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 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 rotation, so that the pedal 25 is at the highest position. The pedal 25 is repeatedly moved to provide power for the wheel 21. Conversely, when the folding wheelbarrow 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 and finally abuts against the rubber ring 62, that is, in the storage state position. The sliding cavity and the third return spring are conventional structures, and the drawings of the embodiment are not shown.

[0126] In summary, when the folding wheelbarrow is in the use state as shown in the accompanying Figure 1 , the left handle 11 and the right handle 10 present a Y-shaped form with the first head 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 rotation plane of the wheel 21. When the folding wheelbarrow is in the storage state as shown in the accompanying Figure 2 , the left handle 11 and the right handle 10 are at a position parallel to the first head vertical pipe 3, the first head vertical pipe 3 and the second head vertical pipe 4 are folded to surround the wheel 21, the crank 23 is at a position abutting against the rubber ring 62, and the plate surface of the pedal 25 is parallel to the rotation plane of the wheel 21.

[0127] Obviously, the above-described embodiments are only a part of the 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 of the technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A foldable unicycle, characterized in that, The utility model relates to a foldable bicycle, which comprises a handle, a body group, a first head vertical pipe, a second head vertical pipe, a first connecting limiting piece and a second connecting limiting piece. The handle comprises a left handle and a right handle. One end of the first head vertical pipe is provided with a handle joint, and the two ends of the handle joint are respectively used for mounting the left handle and the right handle. One end of the second head vertical pipe is provided with a second connecting part which is hinged with the first connecting part, and the other end of the second head vertical pipe is provided with a third connecting part. The body group comprises a wheel frame and a wheel, and the wheel is rotatably installed on the wheel frame. The first connecting limiting piece is installed on the first head vertical pipe, and the first connecting limiting piece can be connected with the second head vertical pipe. The first head vertical pipe and the second head vertical pipe both have a use state position and a folding state position. When the first head vertical pipe and the second head vertical pipe are in the use state position, the first head vertical pipe and the second head vertical pipe are coaxially connected, the second head vertical pipe and the connecting pipe are coaxially connected, the first connecting limiting piece connects the first head vertical pipe and the second head vertical pipe, and the second connecting limiting piece connects the second head vertical pipe and the connecting pipe. When the first head vertical pipe and the second head vertical pipe are in the folding state position, the first head vertical pipe and the second head vertical pipe have an included angle alpha, the second head vertical pipe and the connecting pipe have an included angle beta, the first connecting limiting piece is not connected with the second head vertical pipe, and the second connecting limiting piece is not connected with the connecting pipe. The first connecting part comprises a first connecting wall and a first boss arranged on the first connecting wall.

2. The foldable unicycle according to claim 1, characterized in that 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.

3. The foldable unicycle according to claim 2, characterized in that 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. The second boss is inserted into the second groove, and the second boss is hinged with the second groove through a rotating shaft. The first connecting wall is an inclined end wall arranged on one end of the first head vertical pipe. The third connecting wall is an inclined end wall arranged on the other end of the second head vertical pipe. The fourth connecting wall is an inclined end wall arranged on one end of the connecting pipe.

4. The foldable unicycle according to claim 3, characterized in that The first and second connecting limit members are threaded pipes with internal threads; The first upper thread is arranged on the first vehicle head vertical pipe near the first connecting part, the first lower thread is arranged on the second vehicle head vertical pipe near the second connecting part, the first connecting limit member is sleeved on the first upper thread of the first vehicle head vertical pipe, and the first connecting limit member is connectable with the first lower thread; The second upper thread is arranged on the second vehicle head vertical pipe near the third connecting part, the second lower thread is arranged on the connecting pipe near the fourth connecting part, the second connecting limit member is sleeved on the second upper thread of the second vehicle head vertical pipe, and the second connecting limit member is connectable with the second lower thread.

5. The foldable unicycle according to claim 3, wherein The first connecting wall is provided with a first through hole communicating with the internal cavity of the first vehicle head vertical pipe, the second connecting wall is provided with a second through hole communicating with the internal cavity of the second vehicle head vertical pipe, the third connecting wall is provided with a third through hole communicating with the internal cavity of the second vehicle head vertical pipe, and the fourth connecting wall is provided with a fourth through hole communicating with the internal cavity of the connecting pipe.

6. The foldable unicycle according to claim 1, wherein Both ends of the handle joint are provided with connecting ports, the connecting ports are provided with first and second clamping positions, the left handle and the right handle are provided with connecting heads threadedly connected with the connecting ports, the left handle and the right handle can rotate around the connecting ports with the axis of the connecting ports as the central axis, and the connecting heads can be clamped in the first and second clamping positions, respectively. The left handle and the right handle have a use state position and a folding state position, when the left handle and the right handle are 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 heads are clamped in the first clamping position, when the left handle and the right handle are in the folding state position, the left handle and the right handle are parallel to the first vehicle head vertical pipe, and the connecting heads are clamped in the second clamping position.

7. The foldable unicycle according to claim 6, characterized in that The handle further comprises two sets of limiting assemblies for connecting the connecting ports and the connecting heads, the limiting assemblies comprise 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 penetrating from one side to the opposite side, the guide holes are strip-shaped holes extending in 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, the second clamping position is a pair of second limiting notches in the side wall of the connecting port, and the inside of the connecting head is provided with a limiting hook; The limiting screw penetrates 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 in the axial direction of the connecting head, the limiting screw moves in 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 in the use state position, the guide hole corresponds to the first limiting notch, and the limiting screw is clamped on the first limiting notch; when the left handle and the right handle are in the folding state position, the guide hole corresponds to the second limiting notch, and the limiting screw is clamped on the second limiting notch; pulling the limiting ring can make the limiting ring away from the connecting port, and the limiting screw is separated from the first limiting notch or the second limiting notch.

8. The foldable unicycle according to claim 1, characterized in that, The vehicle body group further comprises two sets of foot pedal assemblies for driving the wheels to rotate, and the two sets of foot pedal assemblies are symmetrically installed on the wheel frame; the foot pedal assembly comprises a crank, a limiting mechanism, a pedal, a first guide pipe and a second guide pipe in communication with each other; One end of the crank is connected to the wheel frame for driving the rotation of the wheel, 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; 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 can be 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 foldable unicycle according to claim 8, characterized in that The limiting mechanism comprises a ball, a sleeve, a second return spring and a fixing ring; the fixing ring is coaxially installed at one 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 return spring is sleeved on the outer wall of the second guide pipe, one end of the return spring abuts against the fixing ring, and the other end of the return spring is used to connect 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 the second return spring; the inner wall of the sleeve is further provided with an avoiding groove, and 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, and 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 foldable unicycle according to claim 8, characterized in that The foot pedal assembly further comprises a limiting sliding block, a hand dial, a rubber ring and a return torsion spring; The rubber ring is fixed to the end of the rotating shaft of the wheel; The wheel frame is provided with a driving shaft for driving the wheel to rotate, the driving shaft is arranged at intervals with the rotating shaft of the wheel, and the end of the driving shaft is provided with a ratchet part for connecting the crank; The crank is internally provided with an inner tooth ring for one-way engagement with the ratchet part, and the outer wall of the crank is provided with a stop block; The reset torsion spring is mounted on the driving shaft, one end of the reset torsion spring is connected with the crank, the reset torsion spring drives the crank to rotate in the reverse direction of the engagement direction of the inner tooth ring and the ratchet part, and the crank can abut against the rubber ring; The outer wall of the wheel frame is provided with a sliding cavity, the limiting slide block is slidably mounted in the sliding cavity, one end of the limiting slide block is provided with a third reset spring connected with the wheel frame, the other end of the limiting slide block can extend out of the sliding cavity, and the other end of the limiting slide block is used for abutting against the stop block to limit the reverse rotation of the crank in the engagement direction of the inner tooth ring and the ratchet part; the hand dial is connected with the limiting slide block, and the hand dial can drive the other end of the limiting slide 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 wheel, and the stop block is limited by the limiting slide block; when the crank is in the storage state position, one end of the crank provided with the pedal is close to the wheel, and the crank abuts against the rubber ring.

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