CN115946802A - Folding balance car - Google Patents

Abstract

The embodiment of the invention discloses a folding balance car, which comprises: the device comprises a frame, a driving mechanism, a transmission mechanism, a front wheel and a rear wheel; the driving mechanism comprises a left crank, a left pedal, a right crank and a right pedal; the front wheels comprise a left front wheel and a right front wheel which are parallel to each other; the rear wheel comprises a left rear wheel, a right rear wheel and a suspension bracket; the frame and the transmission mechanism, the driving mechanism and the rear wheel are all folded, when the frame is folded, the frame is located between the left front wheel and the right front wheel, the left crank, the left pedal and the left rear wheel are respectively parallel to the left side of the left front wheel, and the right crank, the left pedal and the right rear wheel are respectively parallel to the right side of the right front wheel. According to the embodiment of the invention, the frame is folded between the left front wheel and the right front wheel, the left crank, the left pedal and the left rear wheel are folded and attached to the left side of the left front wheel, and the right crank, the right pedal and the right rear wheel are folded and attached to the right side of the right front wheel, so that the whole balance car has a small volume after being folded, and is very convenient to store and carry.

Description

Folding balance car

Technical Field

The invention relates to the technical field of bicycles, in particular to a folding bicycle.

Background

The traditional bicycle is large in size, heavy in weight and inconvenient to carry and store, and the public transport and the subway are forbidden to carry the bicycles, so that various structural types of folding bicycles appear on the market at present, and the folding bicycles utilize the folding principle to achieve the requirements of light in weight, small in size and convenient to operate to a certain extent.

Folding bicycle on the existing market usually carries out folding design to frame part, handle standpipe and handle to realize reducing occupation space's purpose. However, the folding type bicycle is still bulky after being folded, and is inconvenient to store and carry, so that a folding bicycle with smaller volume after being folded is needed.

Disclosure of Invention

The invention aims to provide a folding balance car to reduce the volume of a folded bicycle.

In order to achieve the purpose, the invention provides the following technical scheme: a folding balance car comprising: the device comprises a frame, a driving mechanism, a transmission mechanism, a front wheel and a rear wheel;

the driving mechanism comprises a left crank, a left pedal, a right crank and a right pedal, the left pedal is connected with the rear end of the left crank in a foldable manner, and the right pedal is connected with the rear end of the right crank in a foldable manner; the transmission mechanism is connected with the frame in a foldable manner, and is provided with an output end and an input end which are respectively connected with the front end of the left crank and the front end of the right crank;

the front wheels comprise a left front wheel and a right front wheel which are parallel to each other, the output ends of the transmission mechanisms are respectively connected with the left front wheel and the right front wheel, and the transmission mechanisms are positioned between the left front wheel and the right front wheel;

the rear wheels comprise left rear wheels, right rear wheels and suspension brackets, the middle parts of the suspension brackets are connected with the frame, one ends of the suspension brackets are connected with the left rear wheels, and the other ends of the suspension brackets are connected with the right rear wheels;

frame and drive mechanism actuating mechanism with the rear wheel all has fold condition, during fold condition, the frame is located left side front wheel with between the right front wheel, left side crank left side pedal with left side rear wheel is on a parallel with respectively the left side of left side front wheel, right side crank left side pedal with right rear wheel is on a parallel with respectively the right side of right front wheel.

Preferably, the front end of the frame is provided with a U-shaped opening and a connecting hole, the transmission mechanism is respectively provided with a quick release rod detachably connected with the U-shaped opening and a connecting shaft rotatably connected with the connecting hole, and the frame can rotate around the connecting shaft by detaching the quick release rod;

limiting bulges are respectively arranged on two sides of the U-shaped opening, limiting nuts are respectively arranged on two ends of the quick-release rod, and inner grooves matched with the limiting bulges are formed in the inner sides of the limiting nuts;

the quick release rod has an opening state and a closing state, and in the closing state, the inner groove is clamped with the limiting protrusion, so that the quick release rod can be limited in the U-shaped opening; when the quick release rod is in an opening state, the inner groove is separated from the limiting protrusion, and the quick release rod can be separated from the U-shaped opening.

Preferably, the left end of the connecting shaft is connected with a first lower limiting part for limiting the lower limit position of the rotation of the left crank, a first elastic block is arranged at the end part of the first lower limiting part, and the left crank is abutted to the first elastic block when located at the lower limit position of the rotation;

the right end of the connecting shaft is connected with a second lower limiting part used for limiting the lower rotating limit position of the right crank, a second elastic block is arranged at the end part of the second lower limiting part, and the right crank is abutted to the second elastic block when located at the lower rotating limit position.

Preferably, the input end of the transmission mechanism is a driving shaft arranged on the driving mechanism, a first ratchet wheel is arranged at the front end of the left crank, the left crank is connected with the left end of the driving shaft through the first ratchet wheel, a second ratchet wheel is arranged at the front end of the right crank, and the right crank is connected with the right end of the driving shaft through the second ratchet wheel.

Preferably, a first upper limit part is arranged on the left side surface of the transmission mechanism, and the first upper limit part is close to the left end of the driving shaft and used for limiting the upper limit position of the left crank;

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

Preferably, a first connecting sleeve is arranged at the front end of the left crank, the first connecting sleeve is sleeved on the first ratchet wheel, and a first limiting block is arranged on the outer wall of the first connecting sleeve; the first upper limiting part comprises a first torsion spring and a first limiting claw, the first limiting claw is provided with a convex first claw end, the first limiting claw is rotatably sleeved on the transmission mechanism, one end of the first torsion spring is clamped with the first limiting claw, the other end of the first torsion spring is clamped on the transmission mechanism, the first claw end is limited to a limiting position for the first limiting block, and the first limiting claw can be rotated to enable the first claw end to be separated from the limiting position for the first limiting block;

a second connecting sleeve is arranged at the front end of the right crank and sleeved on the second ratchet wheel, and a second limiting block is arranged on the outer wall of the second connecting sleeve; the second upper limiting part comprises a second torsion spring and a second limiting claw, the second limiting claw is provided with a second claw end protruding out, the second limiting claw is rotatably sleeved on the transmission mechanism, one end of the second torsion spring is connected with the second limiting claw in a clamping mode, the other end of the second torsion spring is connected onto the transmission mechanism in a clamping mode, the second claw end is limited to the limiting position of the second limiting block, and the second limiting claw can be made to be separated from the limiting position of the second limiting block by rotating the second limiting claw.

Preferably, a third torsion spring is sleeved at the left end of the driving shaft, one end of the third torsion spring is clamped with the first connecting sleeve, and the other end of the third torsion spring is clamped with the transmission mechanism;

the right-hand member cover of drive shaft is equipped with the fourth torsional spring, the one end of fourth torsional spring with second adapter sleeve joint, the other end with drive mechanism joint.

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

the rear end of the right crank is provided with a second connecting pipe, the second connecting pipe is provided with a third interface and a fourth interface which are mutually perpendicular to each other, the third interface is sleeved with the right crank, the fourth interface is connected with the right pedal, and the right pedal can wind the rear end of the right crank to be folded.

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

the second connecting pipe still includes that the second prevents changeing the interface, right side crank still includes that the second prevents changeing the subassembly, the second prevents changeing the subassembly and passes the second prevent changeing the interface with the joint can be dismantled to right side crank, and right the second connecting pipe is spacing.

Preferably, a connecting rod is arranged in the middle of the suspension bracket and is rotatably connected to the rear end of the frame;

a left wheel arm is connected between the suspension bracket and the left rear wheel and can rotate around the axis of the left end of the suspension bracket;

and a right wheel arm is connected between the suspension bracket and the right rear wheel and can rotate around the axis of the right end of the suspension bracket.

Compared with the prior art, the invention has the beneficial effects that:

1. through folding the frame to between left front wheel and the right front wheel, with the folding laminating of left crank, left pedal and left rear wheel in the left side of left front wheel, with the folding laminating of right crank, right pedal and right rear wheel on the right side of right front wheel for the balance car is whole to have very little volume after folding, very convenient storage and carrying.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a first structural schematic diagram of a folding balance car provided by the invention in a use state;

FIG. 2 is a second schematic structural view of the folding balance car in a use state;

fig. 3 is an exploded structural schematic view of the folding balance car in a use state;

FIG. 4 is a schematic structural view of the folding balance car according to the present invention in a folded state;

FIG. 5 is a schematic diagram of the exploded structure of the left crank and the left pedal of the foldable balance car according to the present invention;

FIG. 6 is a schematic diagram of an exploded structure of a frame of the folding balance car;

fig. 7 is an exploded view of the first upper limit portion of the foldable balance car according to the present invention.

Reference numerals:

10. a frame; 11. a U-shaped opening; 111. a limiting bulge; 12. connecting holes;

20. a drive mechanism; 21. a left crank; 211. a first ratchet wheel; 2111. a first tooth holder; 2112. a first spring plate; 2113. a first ratchet; 2114. a first gear sleeve; 212. a first connecting sleeve; 213. a first stopper; 214. a first connecting pipe; 2141. a first interface; 2142. a second interface; 2143. a first anti-rotation interface; 2144. a first anti-rotation component; 2145. a spring plate; 2146. a first rotation prevention catch; 2147. a screw; 22. left pedaling; 23. a right crank; 231. a second ratchet wheel; 2311. a second toothholder; 2312. a second elastic sheet; 2313. a second ratchet; 2314. a second gear sleeve; 232. a second connecting sleeve; 233. a second limiting block; 234. a second connecting pipe; 2341. a third interface; 2342. a fourth interface; 2343. a second anti-rotation interface; 2344. a second anti-rotation component; 24. right treading; 25. a drive shaft; 251. a third torsion spring; 252. a fourth torsion spring;

30. a transmission mechanism; 31. a quick release lever; 311. a limit nut; 312. an inner groove; 32. a connecting shaft; 33. a first lower limit part; 331. a first elastic block; 34. a second lower limit portion; 341. a second elastic block; 35. a first upper limiting portion; 351. a first limiting claw; 352. a first torsion spring; 353. a first claw end; 36. a second upper limit portion; 361. a second limiting claw; 362. a second torsion spring; 363. a second claw end;

40. a front wheel; 41. a left front wheel; 42. a right front wheel;

50. a rear wheel; 51. a left rear wheel; 52. a right rear wheel; 53. a suspension bracket; 531. a left wheel arm; 5311. a first wheel fork; 532. a right wheel arm; 5321. a second wheel fork; 533. a connecting rod.

Detailed Description

Technical solutions in embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and furthermore, the terms "first", "second", "third", "upper, lower, left, right", and the like are used for descriptive purposes only to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and operate, therefore, the terms describing positional relationships in the drawings are used for illustrative purposes only, and are not to be construed as limiting, indicating, or implying relative importance to the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, for example, as being fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; the embodiments of the present invention can be directly connected or indirectly connected through an intermediary, and all other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

As shown in fig. 1-7, embodiments of the present invention are provided.

The embodiment of the invention provides a folding balance car, which comprises: frame 10, drive mechanism 20, transmission mechanism 30, front wheel 40 and rear wheel 50; the driving mechanism 20 comprises a left crank 21, a left pedal 22, a right crank 23 and a right pedal 24, the left pedal 22 is connected with the rear end of the left crank 21 in a foldable manner, and the right pedal 24 is connected with the rear end of the right crank 23 in a foldable manner; the transmission mechanism 30 is connected with the frame 10 in a foldable manner, the transmission mechanism 30 is provided with an output end and an input end, and the input end of the left front wheel 41 is respectively connected with the front end of the left crank 21 and the front end of the right crank 23; the front wheel 40 comprises a left front wheel 41 and a right front wheel 42 which are parallel to each other, the output end of the transmission mechanism 30 is respectively connected with the left front wheel 41 and the right front wheel 42, and the transmission mechanism 30 is positioned between the left front wheel 41 and the right front wheel 42; the rear wheel 50 comprises a left rear wheel 51, a right rear wheel 52 and a suspension bracket 53, the middle part of the suspension bracket 53 is connected with the frame 10, one end of the suspension bracket 53 is connected with the left rear wheel 51, and the other end is connected with the right rear wheel 52; the frame 10, the transmission mechanism 30, the driving mechanism 20 and the rear wheel 50 are folded, and when the frame 10 is folded, the left crank 21, the left pedal 22 and the left rear wheel 51 are parallel to the left side of the left front wheel 41, and the right crank 23, the left pedal 22 and the right rear wheel 52 are parallel to the right side of the right front wheel 42.

In the embodiment of the present invention, since the foldable balance car does not include a handlebar, a seat, etc., the left crank 21, the left pedal 22, the right crank 23, and the right pedal 24 are the most important load-bearing mechanisms, and the materials used in these structures need to have higher strength or bear stronger load than the common crank and pedal; different from the traditional bicycle, the folding balance bike is characterized in that the front wheel 40 drives the rear wheel 50, a user alternately treads the left pedal 22 and the right pedal 24 to drive the left crank 21 and the right crank 23 to rotate up and down, power is transmitted to the transmission mechanism 30, the front wheel 40 comprises a left front wheel 41 and a right front wheel 42, the left front wheel 41 and the right front wheel 42 are parallel to each other and are arranged at a certain distance, compared with the traditional bicycle, a transmission chain is arranged on one side of the bicycle, the transmission mechanism 30 is arranged between the left front wheel 41 and the right front wheel 42, the overall structure of the bike is compact, space occupation is reduced, power transmission can be more balanced due to the arrangement, the power cannot deviate to the left side or the right side, loss caused in the power transmission process is smaller, and the bike is more labor-saving and more efficient to ride; the transmission mechanism 30 is provided with an outer protective shell, and can support the frame 10 and play a role in connection; the rear wheel 50 is used as a balance wheel and a supporting wheel, the rear wheel 50 comprises a left rear wheel 51 and a right rear wheel 52, and compared with the front wheel 40, the distance between the left rear wheel 51 and the right rear wheel 52 is larger, so that a user can be assisted to keep balance and stabilize the center of gravity in the riding process, the balance bicycle is easy to operate, and the entertainment is stronger; compared with the conventional folding bicycle, in the embodiment, after the handlebar and the saddle are omitted, the volume of the whole bicycle before folding is smaller, when folding, as shown in fig. 4, the frame 10 hinged with the transmission mechanism 30 can be directly folded between the left front wheel 41 and the right front wheel 42, the left crank 21 and the right crank 23 can be respectively attached to two sides of the front wheel 40 in parallel by rotating the left pedal 22 and the right pedal 24 respectively to the front wheel 40 to be respectively attached to two sides of the front wheel 40 in parallel, and the folded whole bicycle is attached to the front wheel 40 tightly, so that the whole bicycle is more compact and occupies a small space.

In one embodiment, a U-shaped opening 11 and a connecting hole 12 are formed at the front end of the frame 10, a quick release rod 31 detachably connected to the U-shaped opening 11 and a connecting shaft 32 rotatably connected to the connecting hole 12 are respectively disposed on the transmission mechanism 30, and the frame 10 can rotate around the connecting shaft 32 by removing the quick release rod 31;

two sides of the U-shaped opening 11 are respectively provided with a limiting protrusion 111, two ends of the quick release rod 31 are respectively provided with a limiting nut 311, and the inner side of the limiting nut 311 is provided with an inner groove 312 matched with the limiting protrusion 111;

the quick release rod 31 has two states of opening and closing, when the quick release rod 31 is in the closing state, the inner groove 312 is clamped with the limiting protrusion 111, and the quick release rod 31 can be limited in the U-shaped opening 11; in the open state, the inner groove 312 is separated from the limit protrusion 111, so that the quick release lever 31 can be separated from the U-shaped opening 11.

In this embodiment, as shown in fig. 6, the frame 10 is integrally rod-shaped, the shell of the transmission mechanism 30 is rotatably connected to the frame 10 through a connecting shaft 32, the quick release rod 31 is disposed on the shell of the transmission mechanism 30, the U-shaped opening 11 on the frame 10 can be clamped on the quick release rod 31 for fixing, the quick release rod 31 functions like a fixing pin, the rotary connection between the transmission mechanism 30 and the frame 10 can be changed into a fixed connection, of course, the U-shaped opening 11 and the quick release rod 31 can be separated to change into a rotary connection state again, when the folding balance car needs to be folded, the lever of the quick release rod 31 is pulled to loosen the limit nuts 311 at the two ends of the quick release rod 31, at this time, the inner groove 312 inside the limit nut 311 is separated from the U-shaped limit protrusion 111 outside the U-shaped opening 11, the U-shaped opening 11 is no longer limited by the inner groove 312, the U-shaped opening 11 can be separated from the rod portion of the inner groove 31, so that the transmission mechanism 30 is connected to the frame 10 with the remaining connecting shaft 32 to achieve rotary folding, and accordingly, when the quick release rod 31 is screwed to fix the quick release nut 11 and clamp the quick release rod 11.

In one embodiment, a first lower limit portion 33 is connected to a left end of the connecting shaft 32 for limiting a lower rotation limit position of the left crank 21, a first elastic block 331 is disposed at an end portion of the first lower limit portion 33, and the left crank 21 abuts against the first elastic block 331 when located at the lower rotation limit position;

a second lower limit portion 34 is connected to the right end of the connecting shaft 32 to limit the lower rotational limit position of the right crank 23, a second elastic block 341 is provided at an end of the second lower limit portion 34, and the right crank 23 abuts against the second elastic block 341 when located at the lower rotational limit position.

In this embodiment, different from the traditional pedal type bicycle, the pedals on the left and right sides continuously circulate a complete circular motion in the using process, but the left and right pedals 24 of the folding balance bike reciprocate up and down alternately to make a curve motion, so that in the process of downward movement of the crank, in order to prevent the crank from continuing to make a circular motion, the motion amplitude is too large, and the user is difficult to grasp the balance, so a lower limit part is needed to limit the crank, and when the user needs to rest, the lower limit part can also support the crank; specifically, the front ends of the left pedal 22 and the right pedal 24 are respectively connected to the two sides of the transmission mechanism 30 and located at the upper end of the transmission mechanism 30 close to the upper part, the connecting shaft 32 is located at the upper end of the transmission mechanism 30 close to the lower part, the left crank 21 and the first lower limit part 33 are taken as an example, the right crank 23 and the second lower limit part 34 are similar, when the left crank 21 abuts against the first lower limit part 33, the left crank 21 is located at the lower rotation limit position, at this time, the first lower limit part 33 is as close to the middle part of the left crank 21 as possible, the phenomenon that the first lower limit part 33 or the connection part of the left crank 21 and the transmission mechanism 30 bears too much pressure due to the overlong force arm of the left crank 21 when being stressed is avoided, if the material used by the left crank 21 or the transmission mechanism 30 is not strong enough, the risk of breakage is easily generated, in addition, the first elastic block 331 is arranged at the end part of the first lower limit part 33, the buffer action can be formed when the left crank 21 abuts against the first limit part 33, the left crank 21 can be protected, and the shock absorbing action can be realized because the person is standing, and the first elastic block 331 has certain shock absorbing action.

In one embodiment, the input end of the transmission mechanism 30 is a driving shaft 25 provided on the driving mechanism 20, the front end of the left crank 21 is provided with a first ratchet wheel 211, the left crank 21 is connected with the left end of the driving shaft 25 through the first ratchet wheel 211, the front end of the right crank 23 is provided with a second ratchet wheel 231, and the right crank 23 is connected with the right end of the driving shaft 25 through the second ratchet wheel 231.

In this embodiment, as shown in fig. 5, two ends of the driving shaft 25 are respectively connected to the left crank 21 and the right crank 23, the driving forces of the two cranks are transmitted to the transmission mechanism 30 connected to the middle portion, and then the front wheel 40 is driven to rotate, the first ratchet 211 and the second ratchet 231 can only rotate in one direction, taking the first ratchet 211 as an example, the second ratchet 231 is similar to the first ratchet 211, the first ratchet 211 comprises a first tooth holder 2111, a first elastic piece 2112, a first ratchet 2113 and a first tooth socket 2114, the second ratchet 231 comprises a second tooth holder 2311, a second elastic piece 2312, a second ratchet 2313 and a second tooth socket 2314, the first ratchet 211 realizes the one-way rotation of the left crank 21 through the first tooth socket 2111 arranged inside the front end of the left crank 21, that the first ratchet is clamped to the first tooth holder 2111, that the first ratchet 2113 is clamped to the first tooth holder 2111, that the first ratchet is clamped to the first tooth holder 2113, that the left crank 21 is not rotated up, and the left crank 21 is driven to rotate, and the left crank 21, when the driving shaft is rotated from top to the bottom, the left crank 21, the left crank is in a non-up stroke is not rotated, and the left crank is a non-up stroke is a non-down stroke is a non-up stroke, that is realized, that is a non-up stroke is realized, that the left crank locking state that is realized, and a non-up stroke is realized, that is a non-up stroke is realized, that the left crank locking state that the left crank 21, and a non-up locking state that the left crank 21 is realized, and a non-up crank locking state that the left crank 21 is realized. It should be noted that the number of the first elastic sheet 2112 and the first ratchet 2113 may be set as required, and may be one, two, three, or the like.

In one embodiment, the left side surface of the transmission mechanism 30 is provided with a first upper limit portion 35, and the first upper limit portion 35 is close to the left end of the driving shaft 25 and is used for limiting the upper limit position of the rotation of the left crank 21;

the right side surface of the transmission mechanism 30 is provided with a second upper limit portion 36, and the second upper limit portion 36 is located near the right end of the drive shaft 25 and limits the upper limit position of rotation of the right crank 23.

In the present embodiment, for example, the origin of coordinates is located on the driving shaft 25, and the X axis is directed to the front of the vehicle, the lower limit positions of the left crank 21 and the right crank 23 may be set to have an angle of 180 degrees to 240 degrees with the horizontal plane, and during riding, the user may step on the bicycle in about 100 degrees, for example, in about 135 degrees to 225 degrees, which is the most efficient angle range, and the up-down reset also saves many idle strokes compared with the 360 degrees circular motion. Under the condition, the crank can be longer than a crank of a common bicycle, the longer the moment arm is, the more labor is saved according to the lever principle, and the common bicycle works by winding the crank and ensures that the crank cannot be driven to the ground, so that the length of the crank is limited. In addition, the up-and-down pedaling is more suitable for riding in a standing mode, so that the self gravity of a person is fully utilized, the riding is easier, the riding in a standing mode is more in accordance with ergonomics, and the efficiency of the pedaling system integrating the three points is improved by more than 50% compared with that of a common bicycle.

In one embodiment, the front end of the left crank 21 is provided with a first connecting sleeve 212, the first connecting sleeve 212 is sleeved on the first ratchet wheel 211, and the outer wall of the first connecting sleeve 212 is provided with a first limit block 213; the first upper limiting part 35 comprises a first torsion spring 352 and a first limiting claw 351, the first limiting claw 351 has a first claw end 353 protruding, the first limiting claw 351 is rotatably sleeved on the transmission mechanism 30, one end of the first torsion spring 352 is clamped with the first limiting claw 351, the other end of the first torsion spring 352 is clamped on the transmission mechanism 30, the first claw end 353 is limited to the limiting position of the first limiting block 213, and the first limiting claw 351 is rotated to enable the first claw end 353 to be separated from the limiting position of the first limiting block 213;

a second connecting sleeve 232 is arranged at the front end of the right crank 23, the second connecting sleeve 232 is sleeved on the second ratchet wheel 231, and a second limiting block 233 is arranged on the outer wall of the second connecting sleeve 232; the second upper limiting part 36 includes a second torsion spring 362 and a second limiting claw 361, the second limiting claw 361 has a second claw end 363 protruding, the second limiting claw 361 is rotatably sleeved on the transmission mechanism 30, one end of the second torsion spring 362 is clamped with the second limiting claw 361, the other end is clamped on the transmission mechanism 30, the second claw end 363 is limited to a limiting position for the second limiting block 233, and the second limiting claw 361 is rotated to make the second claw end 363 separate from the limiting position for the second limiting block 233.

In this embodiment, specifically, taking the left crank 21 as an example, the right crank 23 is similar, the front end of the left crank 21 is the end of the left crank 21 connected to the driving shaft 25, the first connecting sleeve 212 is in a hollow tubular shape and is sleeved on the first ratchet 211, the inner wall of the first connecting sleeve 212 is provided with a toothed structure capable of matching with the first toothed sleeve 2114, the first claw end 353 of the first limiting claw 351 abuts against the outer surface of the first connecting sleeve 212, as the first connecting sleeve 212 rotates upward, the first limiting block 213 abuts against the first claw end 353 of the first limiting claw 351, the first limiting claw 351 forms a limiting position for the first limiting block 213, as shown in fig. 7, the first limiting claw includes a first torsion spring 352, one end of the first torsion spring 352 is engaged with the first limiting claw 351, the other end is engaged with the housing of the transmission mechanism 30, when the first limiting claw 351 rotates, the first torsion spring 352 is driven to generate elastic potential energy to loosen, after the first limiting claw 351 drives the first torsion spring 351, the first torsion spring 351 drives the first torsion spring 351 to rotate forward, and the first limiting claw 351 to fold the first limiting block the front side face of the first limiting block 213, so that the first limiting block 213 can be folded forward when the first limiting claw 21 can be folded.

In one embodiment, a third torsion spring 251 is sleeved at the left end of the driving shaft 25, one end of the third torsion spring 251 is clamped with the first connecting sleeve 212, and the other end is clamped with the transmission mechanism 30;

the right end of the driving shaft 25 is sleeved with a fourth torsion spring 252, one end of the fourth torsion spring 252 is clamped with the second connecting sleeve 232, and the other end is clamped with the transmission mechanism 30.

In this embodiment, in order to enable the left crank 21 and the right crank 23 to automatically return upwards after finishing the downward working process, the two ends of the driving shaft 25 are respectively provided with a third torsion spring 251 and a fourth torsion spring 252 which are correspondingly matched with the driving shaft, taking the left crank 21 side as an example, when the left crank 21 is trampled to rotate downwards, the third torsion spring 251 is driven to rotate and tighten, at this time, the third torsion spring 251 continuously accumulates elastic potential energy, when the user changes the center of gravity to apply force to the right crank 23 to trample, the left crank 21 is not subjected to downward force, at this time, the elastic potential energy of the third torsion spring 251 is released, the left crank 21 is driven to rotate upwards to return to the original position, and the user can conveniently trample back and forth to ride.

In one embodiment, the rear end of the left crank 21 is provided with a first connecting pipe 214, the first connecting pipe 214 has a first connector 2141 and a second connector 2142, the axes of the first connector 2141 are perpendicular to each other, the first connector 2141 is sleeved on the left crank 21, the second connector 2142 is connected with the left pedal 22, and the left pedal 22 can be folded around the rear end of the left crank 21;

the rear end of right crank 23 is equipped with second connecting pipe 234, and second connecting pipe 234 has axis mutually perpendicular's third interface 2341 and fourth interface 2342, and right crank 23 is cup jointed to third interface 2341, and right pedal 24 is connected to fourth interface 2342, and right pedal 24 can be folded around the rear end of right crank 23.

The first connecting pipe 214 further comprises a first anti-rotation connector 2143, the left crank 21 further comprises a first anti-rotation component 2144, and the first anti-rotation component 2144 passes through the first anti-rotation connector 2143 to be detachably clamped with the left crank 21 and limits the first connecting pipe 214;

second connecting pipe 234 still includes the second and prevents that interface 2343 turns, and right crank 23 still includes the second and prevents changeing subassembly 2344, and the second prevents changeing subassembly 2344 and passes the second and prevent changeing interface 2343 and can dismantle the joint with right crank 23 to it is spacing to carry out second connecting pipe 234.

In this embodiment, as shown in fig. 5, taking the first connection tube 214 as an example, the second connection tube 234 is similar, the first connection tube 214 is a "T" type or "L" type connection tube, the axes of the tube orifices at the two ends of the first connection tube 214 are perpendicular to each other, one end of the first connection tube 214 is sleeved on the rear end of the left crank 21, the first connection tube 214 can rotate around the axis of the rear end of the left crank 21, and similarly, the other end of the first connection tube 214 is connected to one end of the left pedal 22, the whole left pedal 22 can rotate around the axis of the rear end of the left crank 21, when the folding balance car is folded, the first connection tube 214 is rotated upwards by 90 degrees, so that the left pedal 22 can be attached to the left side of the front wheel 40 in parallel; in addition, in order to support the foot of the user by the left pedal 22 when the left foot pedal 22 is used, a mechanism for preventing the first connecting pipe 214 from rotating is further disposed on the first connecting pipe 214, the first anti-rotation component 2144 is a component or a combination of several components having a circumferential limiting structure, the first anti-rotation component 2144 is composed of a resilient strip 2145, a first anti-rotation catch 2146 and a screw 2147, wherein a quadrilateral protruding block protruding inwards is disposed inside the first anti-rotation catch 2146, a quadrilateral groove is disposed on a side of an end surface of the left crank 21, the resilient strip 2145 is clamped between the first anti-rotation catch 2146 and the first connecting pipe 214 to increase a rotational friction force of the first connecting pipe 214 by the quadrilateral protruding block and the quadrilateral groove, and the screw 2147 penetrates through the first anti-rotation catch 2146 to be fixed to the end of the left crank 21, so that the first anti-rotation catch 2146 cannot rotate circumferentially, at this time, the resilient strip 2145 is clamped between the first anti-rotation catch 2146 and the first connecting pipe 214 to increase a rotational friction force of the left foot pedal 22 only when the left foot pedal 22 is pulled strongly in use. The ends of the first connecting tube 214 and the left crank 21 can also be provided with a plurality of locking blocks, that is, the inner side wall of the first connecting tube 214 and the outer side wall of the end of the left crank 21 are provided with locking blocks which are matched with each other, so as to limit the left pedal 22 when the left pedal 22 is folded outwards to a position parallel to the horizontal plane, and one side of the second connecting tube 234 is similar to the first connecting tube 214 and is not described again.

In one embodiment, the middle of the suspension bracket 53 is provided with a connecting rod 533, and the connecting rod 533 is rotatably connected to the rear end of the frame 10;

a left wheel arm 531 is connected between the suspension bracket 53 and the left rear wheel 51, and the left wheel arm 531 can rotate around the axis of the left end of the suspension bracket 53;

a right wheel arm 532 is connected between the suspension 53 and the right rear wheel 52, and the right wheel arm 532 is rotatable around an axis of the right end of the suspension 53.

In this embodiment, the suspension frame 53 may be an integrally formed part, or may be formed by welding and splicing several components, and may be a V-shaped part or a T-shaped part, after the connecting rod 533 is connected to the frame 10 through a bearing, at this time, the connecting rod 533 has an effect of guiding the rear wheel 50 to turn, it is worth mentioning that the left end and the right end of the suspension frame 53 are slightly inclined upward, and the end of the corresponding left wheel arm 531 connected to the left rear wheel 51 is slightly inclined downward and connected to the left end of the suspension frame 53, and the specific structure of the right wheel arm 532 is similar to that of the left wheel arm 531, so that after the connection, when the left rear wheel 51 and the right rear wheel 52 are both in the use state position, the left rear wheel 51 and the right rear wheel 52 are both in an outward "eight" shape, and at this time, the left rear wheel 51 and the right rear wheel 52 are both under the suspension frame 53. When the left rear wheel 51 and the right rear wheel 52 are in the folded position, the left rear wheel 51, the right rear wheel 52 and the front wheel 40 are entirely parallel, and at this time, the left rear wheel 51 and the right rear wheel 52 are in front of the suspension bracket 53. The use-state position and the folded-state position described above refer to two different fixing positions of the left rear wheel 51 and the right rear wheel 52. Because the two wheels are in a parallel state after being folded, the whole structure is tightened compared with that before being folded, the occupied space is reduced, and the two wheels can be used as supporting wheels; in addition, one end of the left wheel arm 531 connected to the left rear wheel 51 is provided with a first wheel fork 5311, and the left rear wheel 51 is connected to the first wheel fork 5311 through a wheel shaft matching screw; one end of the right wheel arm 532 connected with the right rear wheel 52 is provided with a second wheel fork 5321, and the right rear wheel 52 is connected with the second wheel fork 5321 through a wheel axle matching screw.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A folding balance car, characterized by, includes: the device comprises a frame, a driving mechanism, a transmission mechanism, a front wheel and a rear wheel;

the driving mechanism comprises a left crank, a left pedal, a right crank and a right pedal, the left pedal is connected with the rear end of the left crank in a foldable manner, and the right pedal is connected with the rear end of the right crank in a foldable manner; the transmission mechanism is connected with the frame in a foldable manner, and is provided with an output end and an input end which are respectively connected with the front end of the left crank and the front end of the right crank;

the front wheels comprise a left front wheel and a right front wheel which are parallel to each other, the output end of the transmission mechanism is respectively connected with the left front wheel and the right front wheel, and the transmission mechanism is positioned between the left front wheel and the right front wheel;

the rear wheels comprise left rear wheels, right rear wheels and suspension brackets, the middle parts of the suspension brackets are connected with the frame, one ends of the suspension brackets are connected with the left rear wheels, and the other ends of the suspension brackets are connected with the right rear wheels;

frame and drive mechanism actuating mechanism with the rear wheel all has fold condition, during fold condition, the frame is located left side front wheel with between the right front wheel, left side crank left side pedal with left side rear wheel is on a parallel with respectively the left side of left side front wheel, right side crank left side pedal with right rear wheel is on a parallel with respectively the right side of right front wheel.

2. The folding balance car of claim 1, wherein a U-shaped opening and a connecting hole are formed at the front end of the car frame, a quick release rod detachably connected with the U-shaped opening and a connecting shaft rotatably connected with the connecting hole are respectively arranged on the transmission mechanism, and the car frame can rotate around the connecting shaft by detaching the quick release rod;

limiting bulges are respectively arranged on two sides of the U-shaped opening, limiting nuts are respectively arranged on two ends of the quick-release rod, and inner grooves matched with the limiting bulges are formed in the inner sides of the limiting nuts;

the quick-release rod has two states of opening and closing, and in the closing state, the inner groove is clamped with the limiting protrusion, so that the quick-release rod can be limited in the U-shaped opening; when the quick release rod is in an opening state, the inner groove is separated from the limiting protrusion, and the quick release rod can be separated from the U-shaped opening.

3. The folding balance car of claim 2, wherein a first lower limiting part is connected to the left end of the connecting shaft and used for limiting the lower limit position of rotation of the left crank, a first elastic block is arranged at the end of the first lower limiting part, and the left crank abuts against the first elastic block when located at the lower limit position of rotation;

the right end of the connecting shaft is connected with a second lower limiting part used for limiting the lower rotating limit position of the right crank, a second elastic block is arranged at the end part of the second lower limiting part, and the right crank is abutted to the second elastic block when located at the lower rotating limit position.

4. The folding balance car of claim 1, wherein the input end of the transmission mechanism is a driving shaft provided on the driving mechanism, the front end of the left crank is provided with a first ratchet wheel, the left crank is connected with the left end of the driving shaft through the first ratchet wheel, the front end of the right crank is provided with a second ratchet wheel, and the right crank is connected with the right end of the driving shaft through the second ratchet wheel.

5. The folding balance car of claim 4, wherein a first upper limit portion is provided on a left side surface of the transmission mechanism, the first upper limit portion being located near a left end of the drive shaft and being configured to limit an upper limit position of rotation of the left crank;

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

6. The folding balance car of claim 5, wherein a first connecting sleeve is arranged at the front end of the left crank, the first connecting sleeve is sleeved on the first ratchet wheel, and a first limiting block is arranged on the outer wall of the first connecting sleeve;

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

a second connecting sleeve is arranged at the front end of the right crank and sleeved on the second ratchet wheel, and a second limiting block is arranged on the outer wall of the second connecting sleeve;

the second upper limiting part comprises a second torsion spring and a second limiting claw, the second limiting claw is provided with a second claw end which protrudes out, the second limiting claw is rotatably sleeved on the transmission mechanism, one end of the second torsion spring is clamped with the second limiting claw, the other end of the second torsion spring is clamped on the transmission mechanism, the second claw end is limited to a limiting position for the second limiting block, and the second limiting claw can be rotated to enable the second claw end to be separated from the limiting position for the second limiting block.

7. The folding balance car of claim 6, wherein a third torsion spring is sleeved at the left end of the driving shaft, one end of the third torsion spring is clamped with the first connecting sleeve, and the other end of the third torsion spring is clamped with the transmission mechanism;

the right-hand member cover of drive shaft is equipped with the fourth torsional spring, the one end of fourth torsional spring with second adapter sleeve joint, the other end with drive mechanism joint.

8. The folding balance car of claim 1, wherein a first connecting pipe is arranged at the rear end of the left crank, the first connecting pipe is provided with a first interface and a second interface, the axes of the first interface and the second interface are perpendicular to each other, the first interface is sleeved with the left crank, the second interface is connected with the left pedal, and the left pedal can be folded around the rear end of the left crank;

the rear end of the right crank is provided with a second connecting pipe, the second connecting pipe is provided with a third interface and a fourth interface which are mutually perpendicular to each other, the third interface is sleeved with the right crank, the fourth interface is connected with the right pedal, and the right pedal can wind the rear end of the right crank to be folded.

9. The folding balance car of claim 8, wherein the first connecting pipe further comprises a first anti-rotation interface, the left crank further comprises a first anti-rotation component, and the first anti-rotation component penetrates through the first anti-rotation interface to be detachably clamped with the left crank and limits the first connecting pipe;

the second connecting pipe still includes that the second prevents changeing the interface, right side crank still includes that the second prevents changeing the subassembly, the second prevents changeing the subassembly and passes the second prevent changeing the interface with the joint can be dismantled to right side crank, and right the second connecting pipe is spacing.

10. The folding balance car of claim 1, wherein a connecting rod is arranged in the middle of the suspension bracket, and the connecting rod is rotatably connected to the rear end of the frame;

a left wheel arm is connected between the suspension bracket and the left rear wheel and can rotate around the axis of the left end of the suspension bracket;

and a right wheel arm is connected between the suspension bracket and the right rear wheel and can rotate around the axis of the right end of the suspension bracket.

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