CN113955001A

CN113955001A - Limit drift car

Info

Publication number: CN113955001A
Application number: CN202010682801.6A
Authority: CN
Inventors: 李政; 李宇光; 汤华龙; 李会杰
Original assignee: Zhejiang Deqing Jiusheng Vehicle Industry Co ltd
Current assignee: Zhejiang Deqing Jiusheng Vehicle Industry Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2022-01-21

Abstract

The invention particularly relates to a limit drift vehicle. The hub assembly comprises a hub body, an axle center and a ratchet component, wherein the hub body is provided with two discs through which spokes penetrate, and the outer edge of the opening of the first disc is integrally formed with a mounting seat for mounting a disc brake disc; the ratchet component comprises a ratchet wheel, a pawl and an elastic part A, the ratchet wheel is fixedly arranged in the opening of the second faceplate, the pawl is arranged on the axle center, is engaged with the teeth of the ratchet wheel through the elastic part A and drives the hub body to rotate in a single direction; the rear wheel assembly comprises a rear wheel shaft and a tire assembly, the tire assembly comprises an outer wheel core, an inner wheel core and a tire, the middle part of the tire is a thicker transition section, two ends of the tire are thinner joint sections, the junction of the transition section and the joint sections is positioned on the inner circumferential surface of the tire to form a first step surface, and the inner wheel core and the outer wheel core are embedded into the joint sections to be matched with the first step surface to be clamped and fixed with the tire. The hub assembly is compact in structure, strong in bearing capacity and stable in combination of the rear wheel assembly, and the safety and stability of the tricycle drifting process are improved.

Description

Limit drift car

Technical Field

The invention relates to the technical field of bicycles, in particular to a limit drift vehicle.

Background

The bicycle is used as a traditional short-distance vehicle and has the advantages of light weight, environmental protection, body building, sports and the like. However, the attractive force is insufficient for the luxurious appearance of automobiles, motorcycles, and the like. The limit drift vehicle is produced along with the evolution of time, and brings a very good experience to riding players pursuing the limit drift. The effective implementation of drift for a vehicle depends primarily on the hub structure of the wheel and the rear wheel design.

The hub structure needs not only good transmission performance, but also a unidirectional transmission function, preferably a chainless bicycle with high mechanical efficiency, and the existing bicycle hub is arranged on a chainless bicycle driving body to move forwards, or has the defects of complex structure, large number of parts, poor stability after assembly, small bearing capacity, poor anti-seismic performance and short service life.

The currently common rear wheel structure mostly adopts a single wheel core, the width of the tire is small, the stability in the drifting process is poor, and the safety is weak.

Disclosure of Invention

In order to solve the above problems, an object of the present invention is to provide a limit drifting vehicle with a hub assembly having a compact structure, a strong bearing capacity, a firmly combined rear wheel assembly, and improved safety and stability during drifting.

In order to achieve the purpose, the invention adopts the following technical scheme:

limit drift car includes: the bicycle comprises a handlebar, a front wheel, a frame assembly, a hub assembly, a saddle and a rear wheel assembly, wherein the frame assembly comprises a front fork, a main frame and a rear frame, a steering sleeve is fixedly arranged at the front end of the main frame, the handlebar is installed at the top end of the steering sleeve, the bottom end of the steering sleeve is connected with the front fork, the bottom end of the front fork is rotatably connected with the front wheel, the saddle is arranged on the main frame, the rear end of the main frame is connected with the rear frame, the rear frame supports the rear wheel assembly, the hub assembly comprises a hub body, an axle center and a ratchet component, the hub body is rotatably sleeved on the axle center, the hub body is provided with two hubs penetrating spokes, and a mounting seat for mounting a disk brake is integrally formed at the outer edge of an opening of the first hub; the ratchet component comprises a ratchet wheel, a pawl and an elastic piece A, the ratchet wheel is fixedly arranged in the opening of the second faceplate, the pawl is arranged on the axle center, is engaged with the teeth of the ratchet wheel through the elastic piece A and drives the hub body to rotate in a single direction; the rear wheel assembly comprises a rear wheel shaft and two groups of tire assemblies symmetrically arranged on two sides of a rear frame, each tire assembly comprises an outer wheel core, an inner wheel core and a tire, the tire is cylindrical, the middle of the tire is a thick transition section, two ends of the tire are thin joint sections, the junction of the transition section and the joint sections is positioned on the inner circumferential surface of the tire to form a first step surface, and the inner wheel core and the outer wheel core are embedded into the joint sections and matched with the first step surface to be clamped and fixed with the tire.

Furthermore, a pawl cover is fixedly arranged on the shaft center, pawl accommodating grooves and annular grooves penetrating through the accommodating grooves are uniformly distributed on the inner side of the pawl cover along the circumferential direction, the pawl is provided with a pair of pawl teeth, a concave part is formed between the pawl teeth, and the elastic part A is embedded in the concave part and the annular grooves.

Furthermore, a first bearing for supporting the hub body to rotate is sleeved on the shaft center, and the first bearing is symmetrically arranged on two sides of the center line of the hub body.

Furthermore, anti-disengaging teeth which are distributed equidistantly are formed on the outer peripheral surfaces of the inner wheel core and the outer wheel core, tooth grooves are formed among the anti-disengaging teeth, the axial width of each anti-disengaging tooth is smaller than the width of the wheel core, a second step surface is formed between the tooth tops of the anti-disengaging teeth and the tooth grooves, and the wheel core and the tire are clamped and fixed through the clamping of the first step surface and the second step surface.

Furthermore, the inner wheel core and the outer wheel core are constructed in a way that the inner ring axially protrudes out of the outer ring, and the outer edges of the inner rings of the two wheel cores are abutted.

Furthermore, the inner wheel core is rotatably connected with the rear wheel shaft through a third bearing, or the inner wheel core and the outer wheel core are rotatably connected with the rear wheel shaft through the same third bearing or respectively provided third bearings.

Furthermore, a rear axle tube is formed on the rear frame, the rear axle tube penetrates through the rear axle tube and is connected with the tire assembly in a rotating mode, a first buckle is arranged on the rear axle tube in a protruding mode, and a third bayonet is formed in the end face of the rear axle tube in a matched mode with the first buckle.

Further, a rear shaft sleeve and a rear shaft tube sealing sheet are sleeved on the rear wheel shaft, a first bayonet is formed in the inner ring of the rear shaft sleeve in a matched mode with a first buckle, and a second buckle is axially and convexly arranged on the outer ring of the rear shaft sleeve; the inner ring of the back shaft tube sealing piece is matched with the second buckle to form a second bayonet, and the outer ring is radially and convexly provided with a third buckle matched with the third bayonet.

The quick-release assembly comprises a channel section piece, a quick-release handle, a fixed seat, an elastic piece B and a movable piece, wherein the channel section piece is connected to the saddle and used for laterally limiting the main frame, and a positioning hole is formed in one side edge of the channel section piece; the end of the fixed seat close to the groove-shaped piece is fixedly connected with the fixed seat, the end far away from the groove-shaped piece is pivoted with the quick-release handle, and the pivot is deviated from the center of the handle head to form an eccentric wheel structure; the movable part penetrates through the fixed seat and is provided with a first end abutting against the quick-release handle and a second end matched with the positioning hole, and the second end extends into the positioning hole to abut against the main frame so as to realize the locking of the quick-release assembly; the second end is separated from the positioning hole through the elastic piece B, and the quick-release assembly is released.

Further, still include the screw rod, screw rod one end with the fixing base joint, the other end with the cell type spare spiro union, inside moving part and elastic component B all worn to locate the screw rod, and the both ends of elastic component B apply force in respectively screw rod and moving part.

The invention adopts the technical scheme and has the following beneficial effects: 1) the hub assembly has the advantages that the hub body is integrally formed with the disc brake disc connecting seat, so that the structure of the hub assembly is more compact, the number of parts scattered in the assembling process is reduced, the hub assembly is firm and reliable as a whole, the disc brake disc is resistant to compression and vibration, the service life is prolonged, meanwhile, the disc brake disc is convenient to disassemble and assemble, and the functions of the hub assembly are diversified; 2) the ratchet wheel and the pawl are matched with the one-way driving hub body to realize the forward movement of the bicycle body, the matching mode is reasonable in design, stable in meshing and high in transmission efficiency, and the one-way driving design mode avoids accidents caused by the fact that the bicycle body moves backwards due to the fact that the pedals are mistakenly operated; 3) the two ends of the tire are provided with the joint sections, the middle part of the tire is provided with the transition section, and a first step surface located at the junction position of the two sections is formed and used for being matched with the inner wheel core and the outer wheel core to realize clamping. Block connected mode easy dismounting for the back wheel subassembly can be comparatively convenient obtain the ascending addition of width direction, satisfies the back wheel size requirement of little and wide limit drift car, and the drift in-process, the back wheel keeps certain stability when losing the land fertility of grabbing, and the security is higher when the amazing is experienced in the drift. Simultaneously, the rear wheel subassembly structure that the block is connected is firm, because the cooperation of first step face, the difficult tire that deviates from of wheel core has further demonstrated the promotion of security performance.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the hub assembly of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic structural view of the rear wheel assembly and rear frame of the present invention;

FIG. 5 is a cross-sectional view of the quick release assembly of the present invention;

FIG. 6 is a schematic view of the saddle attachment structure of the present invention;

fig. 7 is an exploded view of fig. 5.

Detailed Description

In order to make the technical features, objects and effects of the present invention more clearly understood, a detailed description of embodiments of the present invention will be given below with reference to the accompanying drawings.

It will be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", and the like, refer to orientations or positional relationships illustrated in the drawings, which are used for convenience in describing the present application and to simplify the description, and do not indicate or imply that the referenced devices or components must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

The terms "first", "second" and "first" are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

When an element is referred to as being "secured to," "mounted to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to fig. 1, which is a schematic structural diagram of a limit drift vehicle according to this embodiment, including a handlebar 100, a front wheel 200, a frame assembly, a hub assembly, a saddle 410 and a rear wheel assembly, where the frame assembly includes a front fork 310, a main frame 320 and a rear frame 330, the main frame 320 has an arc section formed by extending obliquely forward and a straight section formed by extending horizontally backward, a steering sleeve is fixedly installed at the front end of the main frame 320, the handlebar 100 is installed at the top end of the steering sleeve, the bottom end of the steering sleeve is rotatably connected to a vertical tube of the front fork, the front fork legs are rotatably connected to the front wheel 200, the hub assembly is installed in the middle of the front wheel 200 to drive the front wheel 200 to rotate, the saddle 410 is installed on the straight section of the main frame 320, the rear end of the main frame 320 is connected to the rear frame 330, and the rear frame 330 supports the rear wheel assembly.

Referring to fig. 2 and fig. 3, the hub assembly includes a hub body 520, a shaft 510 passing through a central hole in the hub body 520, and a ratchet member for driving between the shaft 510 and the hub body 520. The two ends of the shaft center 510 are wedge-shaped sections, the cross sections of the wedge-shaped sections are square, the shaft center 510 is connected with a crank 720 at the position of the wedge-shaped sections, the outer side of the crank 720 is connected with a pedal 710 for driving the shaft center 510 to rotate, and the cross section of the end part of the shaft center 510 is designed to be square, so that the shaft center 510 and the crank 720 are tightly matched, and the linkage performance is better. The axle center 510 is coupled to a set of symmetrically disposed second bearings 570 near the crank 720, and the hub assembly is rotatably connected to the front fork of the bicycle through the second bearings 570. The rotation is flexible and is not blocked for a long time. In addition, axle center 510 is the hollow shaft for connect the flower-drum quick detach, the installation dismantlement need not other instrument, and is convenient quick.

The hub body 520 is rotatably connected with the shaft center 510 through a first bearing 550, the first bearings 550 are symmetrically arranged on two sides of the center line of the hub body 520, the first bearing 550 provides a plurality of supporting points which are axially symmetrically distributed to the hub body 520, so that the rotating torque of the hub body 520 is uniformly dispersed to the positions of the bearings, the hub body 520 rotates more smoothly and stably, and the service life of the hub body 520 is prolonged. The rolling fit mode of the bearing is adopted, the structure is more stable compared with the ball rolling fit mode, the follow-up maintenance is more convenient, the bearing is a standard part in machinery, the price is low, a user can conveniently obtain the bearing, a professional tool or richer operation experience is not needed during maintenance and replacement, and the popularization rate in the user is relatively high. The flower-drum body 520 both ends have the flower disc of wearing to establish the spoke, and first flower disc 521 opening outer fringe integrated into one piece has the mount pad 523 of installing dish 120 of stopping, the circumference equipartition has six mounting holes on the fitting surface of mount pad 523 and dish 120 of stopping for the cooperation screw is stopped dish 120 and is fastened with flower-drum body 520, and dish 120 of stopping is connected to the brake lever 110 of handlebar 100 positions through the brake line, supplies to ride passerby operation control, this kind of fixed mode easy operation of spiro union, and is fixed firm. The disc brake has good environment adaptability, is suitable for being applied to a brake system of a limit drift car, can provide enough brake guarantee in the environment that the speed of a vehicle is fast or the environment of riding is relatively severe, and the hub body 520 and the mounting seat 523 which adopt an integrated structure ensure that the hub assembly structure is more compact, reduce the number of scattered parts in the assembly process, and have the advantages of firmness, reliability, shock resistance and prolonged service life.

The ratchet component comprises a ratchet 540, pawls 533 and an elastic piece A532, the ratchet 540 is fixedly arranged in the opening of the second faceplate 522 and is provided with a one-way inner ratchet, a pawl cover 530 is fixedly arranged on one side of the shaft center 510 close to the ratchet 540, accommodating grooves 531 are uniformly distributed on the inner side of the pawl cover 530 along the circumferential direction, annular grooves are formed among the accommodating grooves 531 in a penetrating manner, the pawls 533 are respectively arranged in the accommodating grooves 531, each pawl 533 comprises a pair of pawl teeth, a concave part is formed among the pawl teeth, and the elastic piece A532 is embedded in the concave part and the annular groove and enables the pawl teeth to keep a tilting trend towards the ratchet 540. The number of the pawls 533 is preferably three, and the torque force of the pawls 533 for driving the ratchet 540 to rotate is uniformly distributed in the circumferential direction, so that the noise in the rotating process is greatly reduced while the transmission efficiency is improved.

When the rider pedals the bicycle pedal 710 forwards, the shaft 510 rotates along with the crank 720, the pawl teeth mesh with the inner teeth of the ratchet wheel 540 under the rotation of the shaft center 510 and push the ratchet wheel 540, and the hub body 520 is driven to rotate, so that the bicycle body moves forwards; when the rider stops pedaling or pedals the bicycle pedal 710 reversely, the inner teeth of the ratchet wheel are consistent with the direction of the pawl 533, the pawl 533 is always pressed by the inner teeth of the ratchet wheel, the ratchet wheel 540 idles, and the unidirectional driving of the bicycle is realized.

The hub assembly structure of the invention has the following advantages: 1) the hub assembly has the advantages that the hub body is integrally formed with the disc brake disc connecting seat, so that the structure of the hub assembly is more compact, the number of parts scattered in the assembling process is reduced, the hub assembly is firm and reliable as a whole, the disc brake disc is resistant to compression and vibration, the service life is prolonged, meanwhile, the disc brake disc is convenient to disassemble and assemble, and the functions of the hub assembly are diversified; 2) the ratchet wheel and the pawl are matched with the one-way driving hub body to realize the forward movement of the bicycle body, the matching mode is reasonable in design, the meshing is stable, the transmission efficiency is improved, and the one-way driving design mode avoids the accident caused by backward movement of the bicycle body due to mistaken pedaling.

Referring to fig. 4, a rear axle tube 331 is formed on the rear frame 330, the rear wheel assembly includes a rear axle 610 and two sets of tire assemblies symmetrically disposed on two sides of the rear frame 330, the rear axle 610 penetrates through the rear axle tube 331 to be partially connected to the tire assemblies in a rotating manner, a first buckle 611 is disposed on the rear axle 610, and a third bayonet 332 is disposed on an end surface of the rear axle tube 331 and is matched with the first buckle 611 to limit the rotation of the rear axle 610. In another specific embodiment, a rear shaft sleeve 612 and a rear shaft tube sealing piece 613 are further sleeved on the position of the rear axle 610 extending out of the rear shaft tube 331, a first bayonet is formed on an inner ring of the rear shaft sleeve 612 in cooperation with the first buckle 611, and a second buckle is axially and convexly arranged on an outer ring; the inner ring of the rear axle tube sealing piece 613 is matched with the second fastener to form a second bayonet, and the outer ring is radially and convexly provided with a third fastener matched with the third bayonet 332. The hidden buckle of the embodiment has the advantages of ingenious design and stable fixation, and simultaneously avoids the buckle structure from being exposed outside the vehicle body, so that the hidden buckle is easy to damage and affects the appearance.

The tire assembly comprises an outer wheel core 621, an inner wheel core 622 and a tire 623, wherein the tire 623 is constructed in a cylindrical shape, the middle part of the tire 623 is a thicker transition section, two ends of the tire 623 are thinner joint sections, the junction of the transition section and the joint sections is positioned on the inner circumferential surface of the tire 623 to form a first step surface, the outer circumferential surfaces of the inner wheel core and the outer wheel core are formed with anti-disengaging teeth 624 distributed at equal intervals, tooth grooves are formed between the anti-disengaging teeth 624, the axial width of the anti-disengaging teeth 624 is smaller than the width of the wheel core, a second step surface is formed between the tooth tops and the tooth grooves of the anti-disengaging teeth 624, and the inner wheel core and the outer wheel core are embedded into the joint sections and are clamped with each other through the first step surface and the second step surface, so that the wheel core and the tire 623 are clamped. In other embodiments, the tire 623 may also have axially spaced engagement and transition sections, and multiple sets of inner and outer wheel cores may be provided.

The inner wheel core and the outer wheel core are constructed in a way that the inner ring axially protrudes out of the outer ring, and the outer edges of the inner rings of the two wheel cores are abutted. And a third bearing 630 is arranged on the abutting surface of the two wheel cores, and the inner wheel core and the outer wheel core are respectively partially sleeved outside the third bearing 630 and are rotationally connected with the rear wheel shaft 610 through the third bearing 630. In another embodiment, the outer wheel core 621 is engaged with the tire 623, and the inner wheel core 622 is rotatably connected with the rear wheel shaft 610 through a third bearing 630, so as to support the outer wheel core 621 by the rear wheel shaft 610; in yet another embodiment, the inner and outer hubs are rotatably connected to the rear axle 610 by a third bearing 630 provided separately. The turbine-shaped hollow 625 is further arranged inside the inner wheel core and the outer wheel core, so that the wheel core has the characteristic of light weight while being good in heat dissipation.

The rear wheel assembly structure of the present invention has the following benefits: the two ends of the tire are provided with the joint sections, the middle part of the tire is provided with the transition section, and a first step surface located at the junction position of the two sections is formed and used for being matched with the inner wheel core and the outer wheel core to realize clamping. Block connected mode easy dismounting for the back wheel subassembly can be comparatively convenient obtain the ascending addition of width direction, satisfies the back wheel size requirement of little and wide limit drift car, and the drift in-process, the back wheel keeps certain stability when losing the land fertility of grabbing, and the security is higher when the amazing is experienced in the drift. Simultaneously, the rear wheel subassembly structure that the block is connected is firm, because the cooperation of first step face, the difficult tire that deviates from of wheel core has further demonstrated the promotion of security performance.

Referring to fig. 5 to 7, the extreme drifting car of the present embodiment further includes a quick release assembly for adjusting the front and rear positions of the saddle 410, including a channel member 420, a quick release handle, a fixing base, an elastic member B, a movable member 460, and a screw rod 480, where the channel member 420 is connected to the saddle 410 by a screw and used for laterally limiting the main frame 320, and a positioning hole is further formed at one side of the channel member 420, and a nut is fixedly disposed at the outer edge of the positioning hole. One end of the screw rod is matched and fastened with the nut, and the other end of the screw rod is clamped with the fixing seat. The fixed seat is a square body and comprises a first half part 440 and a second half part 490 which are overlapped, and the first ends of the first half part and the second half part are overlapped to form an inner cavity for clamping the screw rod; the second end is recessed inwards to form lug parts on two sides, and the lug parts on the two sides are provided with through holes 441 for pivoting the quick-release handle in a penetrating manner. The quick-release handle comprises a handle head 431 and an arc-shaped handle 432 which is beneficial to holding, the handle head 431 is circular, a pivot point deviates from the center of a circle to form an eccentric wheel structure, a pressing piece 433 is integrally formed on the handle head 431, and a concave part is formed on one side, facing to a screw rod 480, of the pressing piece 433. The hollow interior of the screw rod 480 is communicated with the inner cavity to form a channel for the moving member 460 to pass through, the elastic member B is preferably a pressure spring 470, and may be other elastic objects, of course, the pressure spring 470 is sleeved on the moving member 460, and two ends of the pressure spring 470 respectively abut against the bottom edge of the screw rod 480 and the convex ring arranged on the outer circumference of the moving member 460. The movable part 460 has a first end abutting against the concave part of the pressing part 433 and a second end fitting into the positioning hole.

Specifically, the handle 432 is pulled outwards, the handle head 431 eccentrically moves along with the rotation of the handle 432, the movable piece 460 is separated from the positioning hole under the elastic force of the pressure spring 470, and the groove-shaped piece 420 and the saddle 410 move back and forth relative to the main frame 320 to perform position adjustment; the handle 432 is pulled inwards, the concave part of the pressing piece 433 abuts against the first end of the movable piece 460, and the second end of the movable piece 460 extends into the positioning hole and abuts against the side part of the main frame 320, so that the front and rear positions of the saddle 410 are locked.

The peripheral wall of the movable member 460 is convexly provided with a stop 462, the peripheral wall of the screw 480 is provided with a set screw 481 in a penetrating way, and the set screw 481 is abutted against the stop 462 to stop the rotation of the movable member 460.

The first end of the moving member 460 is supported by the fixing base and located at the supporting and matching position, and the cross section of the moving member is oval. Preferably, a reinforcing plate 450 is clamped at the side part of the supporting and matching surface, and the reinforcing plate 450 is provided with a central hole matched with the cross-sectional size of the movable piece 460. This embodiment avoids the unlocked condition of the second end slipping on the main frame 320 as a result of the rotation of the movable member 460.

The saddle quick-release assembly structure has the following advantages: through the reciprocating row of moving part in the inside passage that fixing base and screw rod formed to stretch into or deviate from the locating hole and the main frame top of cell type spare side are supported or are kept away from, realize this quick detach subassembly's locking and release, convenient operation, the locking is firm, and only need bare-handed can operate labour saving and time saving.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. Limit drift car includes: the bicycle comprises a handlebar (100), a front wheel (200), a frame assembly, a hub assembly, a saddle (410) and a rear wheel assembly, wherein the frame assembly comprises a front fork (310), a main frame (320) and a rear frame (330), a steering sleeve is fixedly arranged at the front end of the main frame (320), the handlebar (100) is installed at the top end of the steering sleeve, the front fork (310) is connected at the bottom end, the front fork (310) is rotatably connected at the bottom end of the front fork (310) to the front wheel (200), the saddle (410) is installed on the main frame (320), the rear end of the main frame (320) is connected with the rear frame (330), and the rear frame (330) supports the rear wheel assembly,

the hub assembly comprises a hub body (520), an axle center (510) and a ratchet component, wherein the hub body (520) is rotatably sleeved on the axle center (510), the hub body (520) is provided with two discs through which spokes penetrate, and the outer edge of an opening of a first disc (521) is integrally formed with a mounting seat for mounting a disc brake disc (120); the ratchet component comprises a ratchet wheel (510), a pawl (533) and an elastic piece A (532), the ratchet wheel (540) is fixedly arranged inside the opening of the second faceplate (522), the pawl (533) is arranged on the shaft center (510), and is meshed with the gear teeth of the ratchet wheel through the elastic piece A (532) and drives the hub body (520) to rotate in a single direction;

the rear wheel assembly comprises a rear wheel shaft (610) and two groups of tire assemblies symmetrically arranged on two sides of a rear frame (330), each tire assembly comprises an outer wheel core (621), an inner wheel core (622) and a tire (623), each tire (623) is cylindrical, the middle of each tire (623) is a thicker transition section, two ends of each tire (623) are thinner joint sections, the junction of each transition section and each joint section is located on the inner circumferential surface of each tire (623) to form a first step surface, and the inner wheel core and the outer wheel core are embedded into the joint sections and matched with the first step surfaces to be clamped and fixed with the tires (623).

2. The extreme drifting car of claim 1, wherein a pawl cover (530) is fixedly arranged on the shaft center (510), pawl accommodating grooves (531) and annular grooves penetrating through the accommodating grooves (531) are uniformly arranged on the inner side of the pawl cover (530) along the circumferential direction, the pawl (533) is provided with a pair of pawl teeth, a concave part is formed between the pawl teeth, and the elastic piece A (532) is embedded in the concave part and the annular grooves.

3. The extreme drifting car of claim 1, wherein the axle center (510) is sleeved with first bearings (550) for supporting the hub body (520) to rotate, and the first bearings (550) are symmetrically arranged on two sides of the center line of the hub body (520).

4. The extreme drifting vehicle as claimed in claim 1, wherein the outer peripheral surfaces of the inner and outer wheel cores are formed with anti-falling teeth (624) which are distributed at equal intervals, tooth grooves are formed between the anti-falling teeth (624), the axial width of the anti-falling teeth (624) is smaller than the width of the wheel core, a second step surface is formed between the tooth tops and the tooth grooves of the anti-falling teeth (624), and the wheel core is clamped with the tire (623) by the engagement of the first and second step surfaces.

5. The extreme drift vehicle of claim 1, wherein the inner and outer wheel cores are configured such that the inner ring axially protrudes from the outer ring and the outer edges of the inner ring of the two wheel cores abut.

6. The extreme drift car of claim 1, wherein said inner wheel core (622) is rotatably connected to said rear wheel axle (610) by a third bearing (630), or wherein the inner and outer wheel cores are rotatably connected to said rear wheel axle (610) by the same third bearing (630) or by separately mounted third bearings (630).

7. The extreme drift car as claimed in claim 1, wherein the rear frame (330) is formed with a rear axle tube (331), the rear axle tube (610) penetrates through the rear axle tube (331) to be partially rotatably connected with the tire assembly, a first buckle (611) is arranged on the rear axle tube (610), and a third bayonet (332) is arranged on the end surface of the rear axle tube (331) in cooperation with the first buckle (611).

8. The extreme drift car as claimed in claim 7, wherein a rear axle sleeve (612) and a rear axle tube sealing piece (613) are sleeved on the rear axle (610),

the inner ring of the rear shaft sleeve (612) is matched with a first buckle (611) to form a first bayonet, and the outer ring is axially provided with a second buckle in a protruding manner;

the inner ring of the rear axle tube sealing piece (613) is matched with the second buckle to form a second bayonet, and the outer ring is radially and convexly provided with a third buckle matched with the third bayonet (332).

9. The extreme drift car of claim 1, further comprising a quick release assembly for saddle fore and aft position adjustment, the quick release assembly comprising a channel member (420), a quick release handle, a fixed seat, a resilient member B, and a movable member (460),

the channel-shaped piece (420) is connected to the saddle (410) and used for laterally limiting the main frame (320), and a positioning hole is formed in one side edge of the channel-shaped piece (420);

the end of the fixed seat close to the groove-shaped piece (420) is fixedly connected with the fixed seat, the end far away from the groove-shaped piece (420) is pivoted with the quick-release handle, and the pivot is deviated from the center of the handle head to form an eccentric wheel structure;

the movable piece (460) penetrates through the fixed seat and is provided with a first end abutting against the quick-release handle and a second end matched with the positioning hole, and the second end extends into the positioning hole to abut against the main frame (320) so as to realize the locking of the quick-release assembly; the second end is separated from the positioning hole through the elastic piece B, and the quick-release assembly is released.

10. The extreme drift car of claim 9, further comprising a screw (480), wherein one end of the screw (480) is connected with the fixed seat in a clamping manner, the other end of the screw is connected with the channel-shaped member (420) in a threaded manner, the movable member (460) and the elastic member B are both arranged inside the screw (480) in a penetrating manner, and two ends of the elastic member B apply force to the screw (480) and the movable member (460) respectively.