CN215154970U - Kart with rotation limiting structure - Google Patents

Abstract

The utility model provides a kart with rotate limit structure, including frame and preceding wheel subassembly, preceding wheel subassembly includes left front wheel and right front wheel, left side front wheel and right front wheel all have the axletree, two the axletree all is fixed with first locating part, the frame both sides are fixed with the second locating part respectively, when preceding wheel subassembly rotates certain angle, wheel subassembly continues to rotate before first locating part and the mutual restriction of contradicting of second locating part. Aiming at the technical problem that the steering angle of the front wheels of the traditional kart is too large to lock the kart in the prior art, the front wheel locking device has a limiting structure, and can limit the rotating angle of the front wheels relative to a frame so as to prevent the front wheels from being locked.

Description

Kart with rotation limiting structure

Technical Field

The utility model relates to a kart with rotate limit structure.

Background

Carting car is a mini sports car, which was popular in europe and america for the early time and is now gaining popularity worldwide. In a conventional kart, an engine mounted on a chassis is used as a vehicle body, and the advancing direction of wheels is controlled by a steering wheel. However, when the traditional kart is steered, the situation that the steering angle of the front wheels is too large, so that the front wheels of the kart are locked and can not be driven occurs,

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

Too big can make the dead technical problem of kart lock of kart front wheel steering angle among the prior art, the utility model provides a kart with rotate limit structure, it has limit structure, can restrict the turned angle of front wheel for the frame to prevent that the front wheel lock is dead.

2. Technical scheme

In order to solve the above problem, the utility model provides a technical scheme does:

the utility model provides a kart with rotate limit structure, includes frame and preceding wheel subassembly, preceding wheel subassembly includes left front wheel and right front wheel, left side front wheel and right front wheel all have the axletree, two the axletree all is fixed with first locating part, the frame both sides are fixed with the second locating part respectively, when preceding wheel subassembly rotates certain angle, first locating part and second locating part conflict each other and restrict preceding wheel subassembly and continue to rotate.

Optionally, the steering wheel assembly is connected with the front wheel assembly through the transmission assembly, and the steering wheel assembly controls the steering of the front wheel assembly through the transmission assembly.

Optionally, the transmission assembly comprises a rotating shaft, a connecting piece, a transmission rod and a linkage rod, one end of the rotating shaft is fixedly connected with the steering wheel assembly, the other end of the rotating shaft is rotatably connected with the frame, the rotating shaft is fixedly connected with the connecting piece, the connecting piece is rotatably connected with the transmission rod, the transmission rod is rotatably connected with the front wheel assembly, and the linkage rod is used for enabling the front wheel assembly to be linked.

Optionally, the left front wheel and the right front wheel are hinged to the frame through a wheel axle, and the right front wheel and the left front wheel are connected to the wheel axle through bearings so that the right front wheel and the left front wheel can rotate relative to the wheel axle.

Optionally, the transmission rod is rotatably connected with the wheel axle of the left front wheel or the wheel axle of the right front wheel, and the linkage rod is connected with the wheel axle of the right front wheel and the wheel axle of the left front wheel to enable the right front wheel and the left front wheel to be linked.

Optionally, the connecting element is connected to the transmission rod via a universal rotation structure, and/or the transmission rod is connected to the wheel axle via a universal rotation structure, and/or the linkage rod is connected to the wheel axle via a universal rotation structure.

Optionally, the universal rotating structure includes universal ball and articulated elements, the articulated elements has the hinge hole, the outer shape that the hinge hole inner wall was cambered surface and universal ball suits, universal ball is in the hinge hole.

Optionally, the hinge hole may accommodate a maximum diameter portion of the ball, and an end of the hinge hole may be sized smaller than a maximum diameter of the ball to prevent the ball from coming out of the hinge hole.

Optionally, the end of the ball is provided with a blocking member, and the size of the blocking member is larger than that of the end of the hinge hole to prevent the ball from falling out of the hinge hole.

Optionally, the transmission assembly is removably connected to the steering wheel assembly.

Optionally, the steering wheel assembly comprises a steering wheel and a steering wheel shaft arranged on the steering wheel, the steering wheel/steering wheel shaft is in threaded connection with the transmission assembly, or the steering wheel/steering wheel shaft is in threaded connection with the transmission assembly.

Optionally, the foldable bicycle further comprises a support rod, a sleeve and a transition piece, wherein the support rod is hinged to the bicycle frame, the support rod is hinged to the sleeve, the sleeve is connected with the rotating shaft in a sliding mode, the rotating shaft is connected with the transition piece through a bearing, and the transition piece is hinged to the bicycle frame so that the support rod and the rotating shaft can be folded relative to the bicycle frame.

Optionally, the support rod has a telescopic structure, such that the support rod is telescopic.

Optionally, the telescopic structure includes a first adjusting rod and a second adjusting rod, a locking mechanism is disposed between the first adjusting rod and the second adjusting rod, and the first adjusting rod and the second adjusting rod can move relatively or be fixed relatively through the locking mechanism.

Optionally, the locking mechanism includes an elastic assembly disposed on one of the first adjusting lever and the second adjusting lever and a plurality of positioning holes disposed on the other of the first adjusting lever and the second adjusting lever, the elastic assembly has an extending portion, the extending portion can extend into or withdraw from the positioning holes, when the extending portion extends into the positioning holes, the first adjusting lever is fixed relative to the second adjusting lever, and when the extending portion withdraws from the positioning holes, the first adjusting lever can move relative to the second adjusting lever.

Optionally, the telescopic structure has a push key for pushing the protruding part out of the positioning hole.

Optionally, the elastic assembly includes an elastic member and a fixing member, the fixing member forms the extending portion, the elastic member is disposed between the first adjusting rod and the fixing member, the first adjusting rod is provided with an accommodating hole for accommodating the fixing member, and the fixing member is disposed in the accommodating hole and protrudes out of the surface of the first adjusting rod.

Optionally, the vehicle body support device further comprises a support rod, a kit and a transition piece, wherein the support rod is hinged to the vehicle frame, the support rod is hinged to the kit, the kit is connected with the rotating shaft through a bearing, the connecting piece is hinged to the transition piece, and the transition piece is hinged to the vehicle frame.

Optionally, the support rod, the rotation shaft, the transition piece and the frame form a quadrilateral structure, so that the rotation shaft and the support rod can be folded relative to the frame.

Optionally, the vehicle body further comprises an auxiliary frame and a sleeve, wherein one end of the auxiliary frame is hinged to the vehicle frame, the other end of the auxiliary frame is fixedly connected with the sleeve, and the sleeve is slidably connected with the rotating shaft.

Optionally, a seat is arranged on the frame, and the seat can be mounted on the frame in a forward-backward moving mode to adjust the distance between the seat and the steering wheel.

Optionally, the seat comprises a base and a backrest, the backrest being removably connected to the base.

Optionally, the backrest is connected with the base through a lifting mechanism, so that the backrest can be lifted relative to the base.

Optionally, elevating system is including locating the loop bar of base, locating the body of rod of back and the locking piece with loop bar threaded connection, the body of rod is located in the loop bar, but locking piece and loop bar threaded connection support in can stretching into the loop bar the body of rod is in order to pin the body of rod.

Optionally, the base is connected with the loop bar through a cross bar, and the cross bar and the loop bar are integrally formed.

Optionally, the bar is foldable or the crossbar is foldable such that the back is foldable relative to the base.

Optionally, the frame is provided with a mounting hole, and the seat is connected with the mounting hole through a bolt.

Optionally, the mounting holes are provided in plurality at equal intervals, and the seat can adjust the position of the seat by connecting with different mounting holes.

Optionally, the frame is of an integrally formed structure.

Optionally, the frame has the receive and release structure makes the frame is extendible or shortens, receive and release structure includes first pole, second pole and setting element, the one end of first pole is established in the second pole, first pole is equipped with a plurality of fixed orificess, the second pole is equipped with the screw hole, the setting element passes through screw hole and second pole threaded connection, the setting element is equipped with the elastic rod, elastic rod and setting element elastic connection, elastic rod one end is in the fixed orifices, during the pulling the elastic rod, the elastic rod with the fixed orifices separation.

Optionally, a positioning structure is disposed between the elastic rod and the positioning member.

Optionally, the positioning structure includes a cover, a first cavity disposed at one end of the positioning member in the cover, and a positioning step disposed on a side wall of the first cavity, wherein the shape of the first cavity is adapted to the shape of one end of the positioning member, and the positioning member is retractable and rotatable relative to the cover to enable the positioning member to fall on the positioning step or fall into the bottom of the first cavity.

Optionally, the lateral wall of first chamber is equipped with the stop part, when the setting element falls on the screens step, the stop part is right the setting element forms and blocks in order to prevent the setting element rotates and breaks away from the screens step.

Optionally, the lateral wall of first chamber is equipped with and link up to the recess of first chamber oral area, the lateral wall of recess forms the stop part, the bottom of recess forms the screens step, the setting element is equipped with and stretches into location portion in the recess.

Optionally, one end of the positioning element is an equilateral polygon structure, and the positioning portion is formed at an angle of the polygon structure.

Optionally, the kart further comprises a rear wheel assembly, the rear wheel assembly comprises a left rear wheel and a right rear wheel, an in-wheel motor is mounted on only one of the left rear wheel and the right rear wheel, and the kart is driven to move through the in-wheel motor.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model provides a pair of kart with rotate limit structure, it has limit structure, and the wheel is for the turned angle of frame before can restricting to prevent that the lock of preceding wheel is dead.

Drawings

FIG. 1 is one of the schematic views of a carting car;

FIG. 2 is a second schematic view of the carting car;

FIG. 3 is a schematic view of a universal swivel arrangement;

FIG. 4 is a third schematic view of the carting car;

FIG. 5 is a schematic view of the locking mechanism of the kart;

FIG. 6 is a schematic diagram of the positioning member and the elastic rod of the carting car;

FIG. 7 is a schematic view of a positioning structure of the kart;

FIG. 8 is a schematic view of a seat of the kart.

The reference numerals in the schematic drawings illustrate:

1. a frame; 11. a seat; 111. a base; 1111. a cross bar; 1112. a loop bar; 112. a backrest; 1121. a rod body; 1122. a locking member; 12. a second limiting member; 121. a first lever; 122. a second lever; 1221. a positioning column; 1222. a screw; 1223. a cover body; 1227. a first chamber; 1226. a clamping step; 13. mounting holes; 2. a front wheel assembly; 21. a wheel shaft; 22. a first limit piece; 3. a steering wheel assembly; 41. a support bar; 42. a rotating shaft; 43. a transmission rod; 44. a linkage rod; 45. a poke rod; 46. a connecting member; 51. a first adjusting lever; 511. an elastic member; 512; a fixing member; 513. a housing hole; 52. a second adjusting lever; 521. positioning holes; 522. pushing a key; 6. a universal rotation structure; 61. a universal ball; 62. an articulation member; 63. a hinge hole; 64. a blocking member; 71. an auxiliary frame; 72. a kit; 73. a transition piece; 8. a rear wheel assembly.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings 1-8 and the accompanying examples.

With reference to fig. 1-8, the carting car with the rotation limiting structure of the embodiment includes a frame 1, a steering wheel assembly 3, a front wheel assembly 2 and a transmission assembly, wherein the steering wheel assembly 3 controls the steering of the front wheel assembly 2 through the transmission assembly. The steering wheel assembly 3 comprises a steering wheel and a steering wheel shaft. The front wheel assembly 2 includes left and right front wheels each having a wheel axle 21. The transmission assembly comprises a rotating shaft 42, a connecting piece 46, a transmission rod 43 and a linkage rod 44, one end of the rotating shaft 42 is detachably connected with a steering wheel or a steering wheel shaft, and the other end of the rotating shaft 42 is connected with the frame 1 through a bearing. The rotating shaft 42 is fixedly connected with a connecting piece 46, the connecting piece 46 is hinged with a transmission rod 43, and the transmission rod 43 is hinged with the wheel axle 21 of the left front wheel or the wheel axle 21 of the right front wheel. The right front wheel and the left front wheel are respectively hinged with the frame 1 through the wheel shafts 21, and the linkage rod 44 is connected with the wheel shaft 21 of the right front wheel and the wheel shaft 21 of the left front wheel to enable the right front wheel and the left front wheel to be linked.

In other embodiments, the drive link 43 may be hinged to the linkage 44.

In a specific application, the steering wheel/steering wheel shaft is connected with the rotating shaft 42 in a threaded manner, or the steering wheel/steering wheel shaft is connected with the rotating shaft 42 through a bolt/screw.

With reference to fig. 2 and 3, a poke rod 45 is fixed on the wheel axle 21, the transmission rod 43 is connected to the wheel axle 21 through the poke rod 45, and the poke rod 45 is hinged to the transmission rod 43. The poke rod 45 is perpendicular to the linkage rod 44, and the poke rod 45 is perpendicular to the wheel axle 21.

In this embodiment, one end of the linkage rod 44 is connected to the poke rod 45 through the universal rotating structure 6, and the other end of the linkage rod 44 is connected to the wheel axle 21 through the universal rotating structure 6. The universal rotating structure 6 comprises a hinge 62 arranged on the linkage rod 44 and a universal ball 61 arranged on the wheel shaft 21. The hinge 62 is provided with a hinge hole 63, and the inner wall of the hinge hole 63 is a cambered surface which is matched with the shape of the universal ball 61. The hinge hole 63 may receive a maximum diameter portion of the ball 61, and the end of the hinge hole 63 may have a size smaller than the maximum diameter of the ball 61 to prevent the ball 61 from being removed from the hinge hole 63. The end of the ball 61 is provided with a blocking member 64, and the size of the blocking member 64 is larger than that of the end of the hinge hole 63, so as to further prevent the ball 61 from falling out of the hinge hole 63. In specific application, the connecting piece 46 is connected with the transmission rod 43 through a universal rotating structure 6, and the transmission rod 43 is connected with the poke rod 45 through the universal rotating structure 6.

Referring to fig. 2, a limiting structure is disposed between the front wheel assembly 2 and the frame 1 to limit a rotation angle of the front wheel assembly 2 relative to the frame 1. The limiting structure comprises a first limiting part 22 arranged on the wheel shaft 21 and a second limiting part 12 arranged on the frame 1. The first limiting members 22 are disposed on the two wheel axles 21, and the second limiting members 12 are disposed on two sides of the frame 1. When the front wheel assembly 2 rotates rightwards for a certain angle, the first limiting member 22 disposed on the right front wheel axle 21 abuts against the second limiting member 12 on the right side of the frame 1, so as to limit the front wheel assembly 2 to continue rotating rightwards. When the front wheel assembly 2 turns left by a certain angle, the first limiting member 22 disposed on the left front wheel axle 21 abuts against the second limiting member 12 on the left side of the frame 1, so as to limit the front wheel assembly 2 to continue to turn left.

In this embodiment, the first limiting member 22 is integrally formed with the wheel axle 21 and perpendicular to the wheel axle 21, and the linkage rod 44 is connected to the wheel axle 21 through the first limiting member 22.

With reference to fig. 1, 2 and 4, the support rod 41 is hinged to the frame 1, the support rod 41 is hinged to the sleeve 72, the sleeve 72 is sleeved on the rotating shaft 42, the sleeve 72 and the rotating shaft 42 can slide relatively, the connecting member 46 is hinged to the transition member 73 and can rotate relative to the transition member 73, and the transition member 73 is hinged to the frame 1, so that the support rod 41 and the rotating shaft 42 can be folded relative to the frame 1. In other embodiments, the support rod 41 is hinged to a sleeve 72, the sleeve 72 is sleeved on the rotating shaft 42, the sleeve 72 and the rotating shaft 42 are relatively slidable, the rotating shaft 42 is connected to a transition piece 73 through a bearing, and the transition piece 73 is hinged to the frame 1, so that the support rod 41 and the rotating shaft 42 can be folded relative to the frame 1. In other embodiments the sleeve 72 is coupled to the rotating shaft 42 by a bearing.

With reference to fig. 1 and 2, the bicycle further comprises an auxiliary frame 71, wherein one end of the auxiliary frame 71 is hinged to the bicycle frame 1, and the other end of the auxiliary frame 71 is fixedly connected to the sleeve 72. The auxiliary frame 71 is used for assisting in fixing the rotating shaft 42. One end of the rotating shaft 42 is hinged with the auxiliary frame 71 through a bearing.

When the sleeve 72 is slidably connected to the rotating shaft 42, a fixing mechanism is provided between the sleeve 72 and the rotating shaft 42 to fix the sleeve 72 and the rotating shaft 42 relatively, so that the rotating shaft 42 is fixed to facilitate the operation of the steering wheel assembly 3. Alternatively, the sleeve 72 and the rotating shaft 42 have a large friction therebetween, and the sleeve 72 and the rotating shaft 42 can slide relative to each other only by overcoming the large friction.

Referring to fig. 4, the support rod 41, the rotation shaft 42, the transition member 73 and the frame 1 form a quadrilateral structure, and the quadrilateral structure may be changed due to instability of the quadrilateral structure, so that the rotation shaft 42 and the support rod 41 can be folded with respect to the frame 1. The hinged part of the transition piece 73 and the frame 1 is provided with a fixing mechanism, and/or the hinged part of the connecting piece 46 and the transition piece 73 is provided with a fixing mechanism, and/or the hinged part of the support rod 41 and the frame 1 is provided with a fixing mechanism, so that the parallelogram structure is stable through the fixing mechanism, and the rotating shaft 42 is fixed to facilitate the operation of the steering wheel assembly 3.

With reference to fig. 5, the supporting rod 41 has a telescopic structure, the telescopic structure includes a first adjusting rod 51 and a second adjusting rod 52, a locking mechanism is disposed between the first adjusting rod 51 and the second adjusting rod 52, the locking mechanism includes an elastic component disposed on one of the first adjusting rod 51 and the second adjusting rod 52 and a plurality of positioning holes 521 disposed on the other one, one end of the first adjusting rod 51 is hinged to the kit, the other end of the first adjusting rod 51 is disposed with the elastic component, and the other end of the first adjusting rod 51 is disposed in the second adjusting rod 52. The second adjusting rod 52 is hinged to the frame 1, and the second adjusting rod 52 is provided with a plurality of positioning holes 521. The elastic assembly comprises an elastic piece 511 and a fixing piece 512, one end of the elastic piece 511 is fixed on the inner wall of the first adjusting rod 51, the other end of the elastic piece 511 is fixed with the fixing piece 512, the first adjusting rod 51 is provided with a containing hole 513 for containing the fixing piece 512, and the fixing piece 512 is arranged in the containing hole 513 and protrudes out of the surface of the first adjusting rod 51. The fixing member 512 of the first adjustment lever 51 contacts the inner wall of the second adjustment lever 52 inside the second adjustment lever 52, and the elastic member 511 is in a contracted state. When the first adjustment lever 51 moves to a fixed position relative to the second adjustment lever 52, that is, when the fixing element 512 moves to the position of the positioning hole 521, the elastic element 511 extends to allow the fixing element 512 to be positioned in the positioning hole 521, so as to fix the first adjustment lever 51 and the second adjustment lever 52. The elastic member 511 may be a spring or an elastic sheet for specific applications.

The second adjustment lever 52 is provided with a push key 522, and the push key 522 is arranged at a position opposite to the positioning hole 521. When the position of the steering wheel assembly needs to be adjusted, the push key 522 is pressed to push the fixing member 512 to be separated from the positioning hole 521, meanwhile, the steering wheel assembly is acted, so that the first adjusting rod 51 and the second adjusting rod 52 move relatively, when the fixing member 512 moves to the next positioning hole 521, the elastic member 511 extends, so that the fixing member 512 is in the positioning hole 521, and the height of the steering wheel is adjusted.

With reference to fig. 4, the frame 1 is an integrally formed structure, or the frame 1 is an integrally fixed structure, and the frame is not adjustable.

With reference to fig. 1, 2, 6 and 7, the frame 1 has a retractable structure, and the retractable structure of the frame 1 is the same as the telescopic structure. Or, the retraction structure includes a first rod 121 and a second rod 122, one end of the first rod 121 is disposed in the second rod 122, the first rod 121 is provided with a plurality of fixing holes, the second rod 122 is provided with a threaded hole, the threaded hole is provided with a positioning element, the positioning element is provided with an elastic rod, the positioning element includes a screw 1222, the elastic rod includes a positioning column 1221 and a cover 1223, the screw 1222 is provided with an aperture for passing through the positioning column 1221, one end of the positioning column 1221 is fixedly connected with the cover 1223, a screw head of the screw 1222 is disposed in the cover 1223, the positioning column 1221 is connected with the screw 1222 through a spring in the aperture, the screw 1222 is in threaded connection with the second rod 122 through the threaded hole, the positioning column 1221 extends into the fixing hole, and the cover 1223 is pulled to drive the positioning column 1221 to be separated from the fixing hole. In other embodiments, the positioning member is a screw 1222, the screw 1222 is screwed with the second rod 122, and the screw 1222 is long enough to extend into the fixing hole to fix the combined length of the first rod 121 and the second rod 122; in other embodiments, the positioning element is provided with an elastic rod, the positioning element is provided with an aperture penetrating through the elastic rod, the elastic rod is arranged in the aperture and is connected with the positioning element through a spring, one end of the elastic rod is arranged in the fixing hole, the other end of the elastic rod is pulled, and the elastic rod can be separated from the fixing hole.

Be equipped with location structure between elastic rod and the setting element, location structure includes lid 1223 and locates the first chamber 1227 that holds setting element one end in the lid 1223 and establishes the screens step 1226 of first chamber 1227 lateral wall, lid 1223 with elastic rod fixed connection, the shape of first chamber 1227 with setting element one end shape suits. When the elastic rod is in the fixed orifices, the setting element is in first chamber 1227 bottom, the pulling lid 1223, lid 1223 drive elastic rod and fixed orifices separation, because the setting element is fixed by the screw hole, so setting element one end moves screens step 1226 one side of lid 1223, rotatory lid 1223 certain angle, setting element one end falls on screens step 1226, makes elastic rod and fixed orifices keep separating.

The lateral wall of first chamber 1227 is equipped with the block portion, when the setting element falls on screens step 1226, the block portion is right the setting element forms and blocks in order to prevent the setting element rotates and breaks away from screens step 1226. The lateral wall of first chamber 1227 is equipped with and link up to the recess of first chamber 1227 oral area, the lateral wall of recess forms the stop part, the bottom of recess forms screens step 1226, the setting element is equipped with and stretches into location portion in the recess. One end of the positioning piece is of an equilateral polygon structure, and the positioning part is formed at the corner of the polygon structure.

Kart has back wheel subassembly 8, back wheel subassembly 8 includes left rear wheel and right rear wheel, wheel in wheel and right rear wheel install wheel in one of them wheel in a left side rear wheel, through wheel in wheel motor drive kart motion.

A seat 11 is mounted on the frame 1, and the seat 11 includes a base 111 and a backrest 112. The backrest 112 is connected with the base 111 through a lifting mechanism, so that the backrest 112 can be lifted relative to the base 111. The lifting mechanism includes a loop bar 1112 disposed on the base 111, a rod 1121 disposed on the backrest 112, and a locking member 1122 in threaded connection with the loop bar 1112. The rod 1121 is disposed in the sleeve rod 1112, and the rod 1121 can move relative to the sleeve rod 1112 to lift the backrest 112. The locking member 1122 is threadedly engaged with the rod 1112 and can extend into the rod 1112 to abut against the rod 1121 to lock the rod 1121. The base 111 is connected with the loop bar 1112 through a cross bar 1111, and the cross bar 1111 and the loop bar 1112 are integrally formed. The rod 1121 or the cross bar 1111 can be folded such that the backrest 112 can be folded with respect to the base 111. The frame 1 is provided with a plurality of mounting holes 13, the mounting holes 13 are arranged at equal intervals, and the base 111 is connected with the mounting holes 13 through bolts. The base 111 can adjust the position of the seat 11 by connecting with different mounting holes.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (36)

1. The utility model provides a kart with rotate limit structure, includes frame and preceding wheel subassembly, preceding wheel subassembly includes left front wheel and right front wheel, left side front wheel and right front wheel all have the axletree, its characterized in that, two the axletree all is fixed with first locating part, the frame both sides are fixed with the second locating part respectively, when preceding wheel subassembly rotated certain angle, first locating part and second locating part contradict each other and restrict preceding wheel subassembly and continue to rotate.

2. The carting car with the rotation limiting structure according to claim 1, further comprising a steering wheel assembly and a transmission assembly, wherein the steering wheel assembly is connected with the front wheel assembly through the transmission assembly, and the steering wheel assembly controls the steering of the front wheel assembly through the transmission assembly.

3. The kart with the rotation limiting structure as claimed in claim 2, wherein the transmission assembly comprises a rotation shaft, a connecting member, a transmission rod and a linkage rod, one end of the rotation shaft is fixedly connected with the steering wheel assembly, the other end of the rotation shaft is rotatably connected with the frame, the rotation shaft is fixedly connected with the connecting member, the connecting member is rotatably connected with the transmission rod, the transmission rod is rotatably connected with the front wheel assembly, and the linkage rod is used for linking the front wheel assembly.

4. The carting car with the rotation limiting structure as claimed in claim 3, wherein the left front wheel and the right front wheel are hinged with the frame through a wheel shaft, and the right front wheel and the left front wheel are connected with the wheel shaft through bearings so that the right front wheel and the left front wheel can rotate relative to the wheel shaft.

5. The kart with the rotation limiting structure as claimed in claim 4, wherein the transmission rod is rotatably connected with the wheel axle of the left front wheel or the wheel axle of the right front wheel, and the linkage rod is connected with the wheel axle of the right front wheel and the wheel axle of the left front wheel to link the right front wheel and the left front wheel.

6. The kart having a rotational limit feature as claimed in claim 5, wherein the link is connected to the drive rod by a universal rotational feature and/or the drive rod is connected to the wheel axle by a universal rotational feature and/or the linkage is connected to the wheel axle by a universal rotational feature.

7. The kart with the rotation limiting structure as claimed in claim 6, wherein the universal rotation structure comprises a universal ball and a hinge member, the hinge member has a hinge hole, the inner wall of the hinge hole is a cambered surface to adapt to the shape of the universal ball, and the universal ball is arranged in the hinge hole.

8. The kart with the rotation limiting structure as claimed in claim 7, wherein the hinge hole can accommodate a maximum diameter portion of the ball, and an end of the hinge hole is smaller than a maximum diameter of the ball to prevent the ball from being removed from the hinge hole.

9. The kart having a rotation restricting structure according to claim 7, wherein the ball end is provided with a stopper having a size larger than that of the end of the hinge hole to prevent the ball from coming out of the hinge hole.

10. The carting car with the rotation limiting structure as recited in claim 2, wherein the transmission assembly is detachably connected with the steering wheel assembly.

11. The kart having the rotation limiting structure according to claim 10, wherein the steering wheel assembly includes a steering wheel and a steering wheel shaft provided on the steering wheel, the steering wheel/steering wheel shaft is threadedly connected with the transmission assembly, or the steering wheel/steering wheel shaft is connected with the transmission assembly by a bolt/screw.

12. The carting car with the rotation limiting structure according to any one of claims 3 to 9, further comprising a support rod, a sleeve member and a transition member, wherein the support rod is hinged to the car frame, the support rod is hinged to the sleeve member, the sleeve member is slidably connected to the rotating shaft, the rotating shaft is connected to the transition member through a bearing, and the transition member is hinged to the car frame, so that the support rod and the rotating shaft can be folded relative to the car frame.

13. The kart with the rotation limiting structure as claimed in claim 12, wherein the supporting rod has a telescopic structure so that the supporting rod is telescopic.

14. The carting car with the rotation limiting structure as claimed in claim 13, wherein the telescopic structure comprises a first adjusting lever and a second adjusting lever, a locking mechanism is provided between the first adjusting lever and the second adjusting lever, and the first adjusting lever and the second adjusting lever can move relatively or be fixed relatively by the locking mechanism.

15. The carting car with the rotation limiting structure as claimed in claim 14, wherein the locking mechanism comprises an elastic member provided on one of the first adjusting lever and the second adjusting lever and a plurality of positioning holes provided on the other, the elastic member having an extending portion which can extend into or exit from the positioning holes, the first adjusting lever being fixed with respect to the second adjusting lever when the extending portion extends into the positioning holes, and the first adjusting lever being movable with respect to the second adjusting lever when the extending portion exits from the positioning holes.

16. The carting car with the rotation limiting structure as claimed in claim 15, wherein the telescopic structure has a push key for pushing the extending part to be separated from the positioning hole.

17. The carting car with the rotation limiting structure as claimed in claim 15, wherein the elastic assembly comprises an elastic member and a fixing member, the fixing member forms the protruding portion, the elastic member is disposed between the first adjusting lever and the fixing member, the first adjusting lever is provided with a receiving hole for receiving the fixing member, and the fixing member is disposed in the receiving hole and protrudes from a surface of the first adjusting lever.

18. The carting car with the rotation limiting structure according to any one of claims 3 to 9, further comprising a support rod, a sleeve member and a transition member, wherein the support rod is hinged to the car frame, the support rod is hinged to the sleeve member, the sleeve member is connected with the rotating shaft through a bearing, the connection member is hinged to the transition member, and the transition member is hinged to the car frame.

19. The carting car with the rotation limiting structure as claimed in claim 18, wherein the support bar, the rotation shaft, the transition piece and the frame are formed in a quadrilateral structure, so that the rotation shaft and the support bar can be folded relative to the frame.

20. The carting car with the rotation limiting structure according to any one of claims 3 to 9 and 13 to 17, further comprising an auxiliary frame and a sleeve, wherein one end of the auxiliary frame is hinged with the car frame, the other end of the auxiliary frame is fixedly connected with the sleeve, and the sleeve is slidably connected with the rotation shaft.

21. A carting car with a rotation-limiting structure according to any one of claims 1 to 11, 13 to 17 and 19, wherein a seat is provided on said frame, said seat being mounted on said frame to be movable back and forth for adjusting the distance to the steering wheel.

22. The carting car with the rotation limiting structure of claim 21, wherein the seat comprises a base and a backrest, and the backrest is detachably connected with the base.

23. The carting car with the rotation limiting structure as claimed in claim 22, wherein the backrest is connected with the base by a lifting mechanism, so that the backrest can be lifted relative to the base.

24. The kart with the rotation limiting structure as claimed in claim 23, wherein the lifting mechanism comprises a sleeve rod disposed on the base, a rod body disposed on the backrest, and a locking member threadedly coupled with the sleeve rod, the rod body is disposed in the sleeve rod, and the locking member threadedly coupled with the sleeve rod can extend into the sleeve rod to abut against the rod body to lock the rod body.

25. The carting car with the rotation limiting structure as claimed in claim 24, wherein the base is connected with the loop bar through a cross bar, and the cross bar and the loop bar are integrally formed.

26. The carting car with the rotation limiting structure of claim 25, wherein the rod body is foldable or the cross bar is foldable so that the backrest can be folded with respect to the base.

27. The carting car with the rotation limiting structure according to any one of claims 22 to 26, wherein the frame is provided with mounting holes, and the seat is connected with the mounting holes by bolts.

28. The kart having the rotation limiting structure according to claim 27, wherein the mounting holes are provided in plurality at equal intervals, and the seat is adjustable in position by being connected to different mounting holes.

29. A carting car with a rotation-limiting structure according to any one of claims 1 to 11, 13 to 17, 19, 22 to 26 and 28, wherein said frame is of an integrally formed structure.

30. A carting car with a rotary limit structure as defined in any one of claims 1-11, 13-17, 19, 22-26, 28 wherein said frame has a retractable structure to make said frame extensible or contractible, said retractable structure including a first rod, a second rod and a positioning member, one end of said first rod being disposed in said second rod, said first rod having a plurality of fixing holes, said second rod having threaded holes, said positioning member being threadedly connected to said second rod via said threaded holes, said positioning member having an elastic rod, said elastic rod being elastically connected to said positioning member, one end of said elastic rod being disposed in said fixing holes, said elastic rod being separated from said fixing holes when said elastic rod is pulled.

31. The carting car with the rotation limiting structure as claimed in claim 30, wherein a positioning structure is provided between the elastic rod and the positioning member.

32. The kart with the rotation limiting structure as claimed in claim 31, wherein the positioning structure comprises a cover, a first cavity disposed at one end of the cover for accommodating the positioning element, and a positioning step disposed on a sidewall of the first cavity, the shape of the first cavity is adapted to the shape of one end of the positioning element, and the positioning element can fall on the positioning step or fall into the bottom of the first cavity by telescopic rotation relative to the cover.

33. The kart with the rotation limiting structure as claimed in claim 32, wherein the side wall of the first cavity is provided with a blocking portion, and when the positioning member falls on the retaining step, the blocking portion blocks the positioning member to prevent the positioning member from rotating to separate from the retaining step.

34. The carting car with the rotation limiting structure as claimed in claim 33, wherein the side wall of the first cavity is provided with a groove penetrating to the opening of the first cavity, the side wall of the groove forms the blocking portion, the bottom of the groove forms the blocking step, and the positioning member is provided with a positioning portion extending into the groove.

35. The kart with the rotation limiting structure as claimed in claim 33, wherein one end of the positioning element is an equilateral polygon, and the positioning portion is formed at the corner of the polygon.

36. A carting car with a rotation limiting structure according to any one of claims 1 to 11, 13 to 17, 19, 22 to 26, 28 and 31 to 35, further comprising a rear wheel assembly, wherein the rear wheel assembly comprises a left rear wheel and a right rear wheel, and a hub motor is mounted on only one of the left rear wheel and the right rear wheel, and the carting car is driven to move by the hub motor.

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