CN213057295U

CN213057295U - Auxiliary wheel device for two-wheeled vehicle

Info

Publication number: CN213057295U
Application number: CN202021364534.XU
Authority: CN
Inventors: 李增志
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-04-27
Anticipated expiration: 2030-07-13

Abstract

The utility model relates to the technical field of vehicle accessories, in order to solve the problem that an auxiliary wheel device can not keep the vertical posture of a vehicle body when the road surfaces at the two sides of the vehicle body have height difference, the utility model provides an auxiliary wheel device for a two-wheeled vehicle, which comprises two sets of independently controlled auxiliary wheel components and a second fixing mechanism; each set of auxiliary wheel assembly comprises a first fixing mechanism, a driving mechanism, a supporting arm and an auxiliary wheel; the first fixing mechanism is used for fixing the driving mechanism on the two-wheeled vehicle; the second fixing mechanism is used for rotatably fixing the supporting arm on the two-wheeled vehicle; the driving mechanism is used for driving the auxiliary wheel to lift; the movable end of the supporting arm is provided with an auxiliary wheel. Each set of auxiliary wheel assembly is driven by an independent driving mechanism to lift the corresponding supporting arm so as to drive the corresponding auxiliary wheel to lift. When the road surfaces on the two sides of the vehicle body have height difference, the two sets of auxiliary wheel assemblies are arranged asynchronously, and the auxiliary wheels on the two sides simultaneously form support with the ground, so that the vertical vehicle body posture is stably kept.

Description

Auxiliary wheel device for two-wheeled vehicle

Technical Field

The utility model relates to a vehicle accessory technical field especially relates to an auxiliary wheel device for two-wheeled vehicle.

Background

The auxiliary wheel device is generally disposed on both sides of a vehicle body of a two-wheeled vehicle such as an electric bicycle or a motorcycle to assist in maintaining a safer and smoother posture of the vehicle body.

In a traditional auxiliary wheel device, two auxiliary wheels positioned at two sides of a vehicle body are driven by a driving mechanism to synchronously lift, and the principle is that the driving mechanism directly drives one auxiliary wheel (a driving auxiliary wheel) to lift; the other auxiliary wheel (driven auxiliary wheel) is coaxially fixed with the driving auxiliary wheel, and the driven auxiliary wheel is driven to synchronously lift through the lifting action of the driving auxiliary wheel.

However, when the conventional auxiliary wheel apparatus is applied to a two-wheeled vehicle, the following disadvantages are found: when the road surfaces on two sides of the vehicle body of the two-wheeled vehicle have a certain height difference, the vertical vehicle body posture cannot be stably maintained by adopting the traditional auxiliary wheel device. The auxiliary wheels on the two sides of the vehicle body of the two-wheeled vehicle are lifted synchronously, the auxiliary wheel on the side with higher terrain contacts the ground before the auxiliary wheel on the side with lower terrain, and at the moment, the auxiliary wheel on the side with higher terrain stops falling under the action of ground resistance; the auxiliary wheel on the lower side of the terrain stops falling synchronously, but the auxiliary wheel on the lower side of the terrain is not yet in contact with the ground, namely the auxiliary wheel on the lower side of the terrain cannot support the two-wheeled vehicle. At this time, under the action of gravity, the two-wheeled vehicle tends to have an inclination angle with respect to a vertical plane, in which case the two-wheeled vehicle has a certain risk of toppling.

SUMMERY OF THE UTILITY MODEL

In order to solve when there is the difference in height of certain degree in two-wheeled vehicle's automobile body both sides road surface, adopt traditional auxiliary wheel device, will unable technical problem who keeps vertical automobile body gesture steadily, the utility model provides a technical scheme does:

the utility model provides an auxiliary wheel device for a two-wheeled vehicle, which comprises two sets of independently controlled auxiliary wheel components and a second fixing mechanism; each set of auxiliary wheel assembly comprises a first fixing mechanism, a driving mechanism, a supporting arm and an auxiliary wheel; the first fixing mechanism is used for fixing the fixed end of the driving mechanism on the two-wheeled vehicle; the second fixing mechanism is used for rotatably fixing the fixed end of the supporting arm on the two-wheeled vehicle; the driving mechanism is used for driving the auxiliary wheel to lift; the stiff end of support arm with second fixed establishment rotationally connects, the activity of support arm is served and is set up the auxiliary wheel.

Further, the number of the second fixing mechanisms is 1, and the second fixing mechanisms are of an integral fixing structure; the integral fixing structure comprises a first mounting plate, a second mounting plate, two lug plates, a guide sleeve and a connecting bolt which are horizontally arranged; the first mounting plate is arranged right above the second mounting plate; the first mounting plate and the second mounting plate are fixed through the connecting bolts; the two ear plates are vertical and fixed on the lower surface of the second mounting plate; the two ear plates are parallel and are reserved with intervals; mounting through holes are respectively formed in the two ear plates; the guide sleeve horizontally penetrates through the two mounting through holes and is fixed with the mounting through holes; the fixed end of each supporting arm is provided with a supporting arm rotating shaft; the support arm rotating shafts corresponding to the two sets of auxiliary wheel assemblies are respectively inserted at two ends of the guide sleeve, and each support arm rotating shaft can rotate relative to the guide sleeve.

Further, the number of the second fixing mechanisms is 2, and each of the second fixing mechanisms is used for rotatably fixing the fixed end of one of the support arms to the two-wheeled vehicle.

Further, the driving mechanism comprises a motor, a shell and a transmission assembly; the shell is provided with a first through hole and a second through hole; the motor comprises a motor shaft; the motor shaft penetrates through the first through hole and is rotatably arranged in the shell; the transmission assembly penetrates through the second through hole to be in transmission connection with the motor shaft; the shell is fixed on the first fixing mechanism; the transmission assembly is in transmission connection with the supporting arm.

Further, the transmission assembly comprises a worm, a worm wheel, a rack, a connecting rod, a torsion spring mounting arm and a torsion spring; the fixed end of the worm is fixed with the motor shaft, and the transmission end of the worm is meshed with the worm wheel; the transmission end of the worm wheel is meshed with the rack; the meshing position of the worm and the worm wheel and the meshing position of the worm wheel and the rack are both positioned in the shell; one end of the connecting rod is hinged with the rack, and the other end of the connecting rod is hinged with the torsion spring mounting arm; the torsion spring mounting arm is rotatably connected with the supporting arm, the torsion spring is arranged in a gap between the torsion spring mounting arm and the supporting arm, one end of the torsion spring is fixed on the torsion spring mounting arm, and the other end of the torsion spring is fixed on the supporting arm; the second through hole is a guide through hole with openings at two ends; the rack is movably arranged in the guide through hole.

Further, the connecting rod comprises a sleeve, a threaded rod and a locking nut; the locking nut is connected with the threaded rod through threads, and the sleeve is fixed with the threaded rod through threads and the locking nut; the sleeve is hinged with the rack; the threaded rod is hinged to the torsion spring mounting arm.

Further, the transmission assembly further comprises two protective sleeves; the protective sleeve is sleeved outside the rack, and the joint of the protective sleeve and the shell is arranged in a sealing mode.

Further, the first fixing mechanism comprises a third mounting plate and a third connecting bolt; one part of the third mounting plate is an arc-shaped plate; the arc-shaped plate is matched with one part of the two-wheeled vehicle; the third mounting plate is fixed to the two-wheeled vehicle by the third connecting bolt.

Furthermore, the supporting arm is provided with supporting feet; the supporting feet are arranged at the free ends of the supporting arms; and a gap is reserved between the supporting leg and the auxiliary wheel.

The utility model has the advantages of or beneficial effect:

the utility model provides an auxiliary wheel device for two-wheeled vehicle through setting up two sets of auxiliary wheel subassemblies, because every set of auxiliary wheel subassembly all includes actuating mechanism, support arm and auxiliary wheel, every set of auxiliary wheel subassembly can be carried out the action of going up and down by the corresponding support arm of independent actuating mechanism drive separately, and then drives corresponding auxiliary wheel and goes up and down the action. So, according to the in-service use demand, the lifting action of the auxiliary wheel that is located the automobile body both sides can be synchronous, also can not the setting step. By arranging the two sets of auxiliary wheel assemblies asynchronously, when the road surfaces on the two sides of the vehicle body of the two-wheeled vehicle have a certain height difference, the auxiliary wheels on the two sides of the vehicle body can simultaneously and reliably support the ground, so that the vertical vehicle body posture is stably kept.

Drawings

The invention and its features, aspects and advantages will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not intended to be drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic perspective view of an auxiliary wheel assembly of an auxiliary wheel device for a two-wheeled vehicle according to embodiment 1 of the present invention;

fig. 2 is a schematic perspective view of an auxiliary wheel device for a two-wheeled vehicle according to embodiment 2 of the present invention

FIG. 3 is an exploded view of a portion of the structure of FIG. 2;

fig. 4 is an exploded view of another portion of the structure of fig. 2.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

As the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientation or positional relationship is based on that shown in the drawings, merely for convenience in describing the invention and simplifying the description, and does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

The appearances of the terms first, second, and third, if any, are used for descriptive purposes only and are not intended to be limiting or imply relative importance.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention are described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

In order to solve the technical problem that when the road surfaces on two sides of the vehicle body of the two-wheeled vehicle have a certain height difference, the vertical vehicle body posture cannot be stably maintained by adopting the conventional auxiliary wheel device, embodiment 1 provides an auxiliary wheel device for the two-wheeled vehicle, which comprises two sets of independently controlled auxiliary wheel assemblies 1 and a second fixing mechanism 11 as shown in fig. 1; each set of auxiliary wheel assembly 1 comprises a first fixing mechanism 10, a driving mechanism 12, a supporting arm 13 and an auxiliary wheel 14; wherein, the first fixing mechanism 10 is used for fixing the fixed end of the driving mechanism 12 on the two-wheeled vehicle; the second fixing mechanism 11 is used for rotatably fixing the fixed end of the supporting arm 13 to the two-wheeled vehicle; the driving mechanism 12 is used for driving the auxiliary wheel 14 to lift; the fixed end of the supporting arm 13 is rotatably connected with the second fixing mechanism 11, and the movable end of the supporting arm 13 is provided with an auxiliary wheel 14. For example, as shown in fig. 1, the number of the second fixing mechanisms 11 is 2, and each of the second fixing mechanisms 11 is used for rotatably fixing the fixed end of one 1 supporting arm 13 to the two-wheeled vehicle. By arranging two sets of auxiliary wheel assemblies 1, each set of auxiliary wheel assembly 1 comprises a driving mechanism 12, a supporting arm 13 and an auxiliary wheel 14, and each set of auxiliary wheel assembly 1 can be driven by the respective independent driving mechanism 12 to drive the corresponding supporting arm 13 to perform lifting action, so as to drive the corresponding auxiliary wheel to perform lifting action. So, according to the in-service use demand, the lifting action of the auxiliary wheel that is located the automobile body both sides can be synchronous, also can not the setting step. Specifically, the auxiliary wheel device for a two-wheeled vehicle provided in embodiment 1 is applied to a two-wheeled vehicle, and when there is a certain level of difference in height between road surfaces on both sides of a vehicle body of the two-wheeled vehicle, in order to stably maintain a vertical posture of the vehicle body, the auxiliary wheel device for a two-wheeled vehicle may perform the following actions:

(1) two sets of auxiliary wheel assemblies 1 positioned on two sides of the vehicle body are driven by respective driving mechanisms 12 to drive corresponding supporting arms 13 to fall, and further drive corresponding auxiliary wheels 14 to fall. At this time, the falling actions of the two sets of auxiliary wheel assemblies 1 can be synchronously performed or asynchronously performed;

(2) when any auxiliary wheel 14 contacts the ground, the ground applies an upward acting force to the auxiliary wheel 14, and the acting force acts on the corresponding driving mechanism 12 through force transmission, which is expressed in that the resistance of the corresponding driving mechanism 12 for driving the auxiliary wheel 14 to perform a falling action is increased; the corresponding drive mechanism 12 senses an increase in resistance to a threshold value, i.e., stops the motion of the auxiliary wheel 14 to continue dropping, at which time the auxiliary wheel 14 remains stationary (fixed in height relative to the ground). When the two sets of auxiliary wheel assemblies 1 stop falling, stable four-point support is formed between the two-wheeled vehicle and the ground, namely four support points of front and rear wheels of the two-wheeled vehicle and two auxiliary wheels 14 positioned on two sides of the vehicle body support the two-wheeled vehicle to keep a stable vertical vehicle body posture.

When the two-wheeled vehicle is in a vertical vehicle body posture, the gravity center of the two-wheeled vehicle is just positioned on a vertical plane where the two-wheeled vehicle is positioned, and the two-wheeled vehicle is not easy to topple.

The threshold value corresponding to the resistance of the driving mechanism 12 is set by performing a repeated drop test of the auxiliary wheel 14 on a two-wheeled vehicle provided with an auxiliary wheel device for the two-wheeled vehicle, and using the state parameter of the driving mechanism 12 when the auxiliary wheel 14 can reliably support the two-wheeled vehicle as the threshold value corresponding to the resistance of the driving mechanism 12.

In particular, since most of the road surfaces on which the two-wheeled vehicle is actually driven or parked are horizontal, although the two sets of auxiliary wheel assemblies 1 can be independently controlled, unless an external force (such as a ground force) is applied, the two sets of auxiliary wheel assemblies 1 located on both sides of the vehicle body are normally lifted and lowered synchronously. Therefore, the two-wheeled vehicle can be kept in a more stable vehicle body posture on a horizontal road.

Example 2

On the basis of embodiment 1, in order to improve the stability of the two-wheeled vehicle, further, as shown in fig. 2 and 4, the number of the second fixing mechanisms 11 is 1, and the second fixing mechanisms 11 are of an integral fixing structure; the integral fixing structure comprises a first mounting plate 110, a second mounting plate 111, two lug plates 112, a guide sleeve 113 and a connecting bolt 114 which are horizontally arranged; the first mounting plate 110 is disposed directly above the second mounting plate 111; the first mounting plate 110 and the second mounting plate 111 are fixed by a connecting bolt 114; two ear plates 112 are vertical and fixed on the lower surface of the second mounting plate 111; the two ear plates 112 are parallel and are spaced apart; the two ear plates 112 are respectively provided with mounting through holes 1120 (see fig. 4);

wherein the first mounting plate 110 and the second mounting plate 111 are both mounted in the bottom vicinity area of the two-wheeled vehicle: for example, the first mounting plate 110 and the second mounting plate 111 are both mounted to the frame near the bottom of the two-wheeled vehicle, wherein the first mounting plate 110, the second mounting plate 111, and the attachment bolts 114 can form a secure clamping fixation of a portion of the frame. The frame is disposed in the gap between the first mounting plate 110 and the second mounting plate 111. The ear plate 112 is used to fix the guide sleeve 113, and thus, the fixed end of the support arm 13 is rotatably fixed.

As shown in fig. 2, the guide sleeve 113 horizontally penetrates through the two mounting through holes 1120 and is fixed with the mounting through holes 1120; the fixed end of each support arm 13 is provided with a support arm rotating shaft 130 (see fig. 4); the support arm rotating shafts 130 corresponding to the two sets of auxiliary wheel assemblies 1 are respectively inserted into two ends of the guide sleeve 113, and each support arm rotating shaft 130 can rotate relative to the guide sleeve 113. The supporting arm rotating shaft 130 is further sleeved with a ring sleeve 15, and the ring sleeve 15 is used for axially fixing the supporting arm rotating shaft 130 and the guide sleeve 113.

Through the rotatable cooperation of the guide sleeve 113 and the support arm rotating shafts 130 at the two ends thereof, the two support arm rotating shafts 130 at the two sides of the body of the two-wheeled vehicle can be ensured to keep good coaxiality, and a good foundation is laid for realizing synchronous lifting of the two sets of auxiliary wheel assemblies 1. At this time, since the two support arm rotation shafts 130 are coaxially disposed, the guide sleeve 113 is disposed perpendicular to the vehicle body. When the road surfaces on the two sides of the vehicle body of the two-wheeled vehicle are at the same height, the auxiliary wheels 14 positioned on the two sides of the vehicle body synchronously fall, and the connecting line of the supporting points formed by the auxiliary wheels and the road surfaces on the two sides is perpendicular to the connecting line of the front wheels and the rear wheels of the two-wheeled vehicle.

To solve the problem of how to fix the driving mechanism to the first fixing mechanism, further, as shown in fig. 2 and 3, the driving mechanism 12 includes a motor 120, a housing 121, and a transmission assembly 122; the housing 121 is provided with a first through hole 1210 and a second through hole 1211; the motor 120 includes a motor shaft 1200; the motor shaft 1200 is rotatably disposed in the housing 121 through the first through hole 1210; the transmission assembly 122 passes through the second through hole 1211 and is in transmission connection with the motor shaft 1200; the housing 121 is fixed to the first fixing mechanism 10; the transmission assembly 122 is in transmission connection with the support arm 13. By arranging the housing 121, on one hand, the housing 121 and the first fixing mechanism 10 can be directly fixed in a manner of forming a plurality of mounting holes, and then the driving mechanism 12 can be indirectly fixed through the housing 121; on the other hand, the housing 121 provides a relatively sealed chamber for the connection between the motor shaft 1200 and the transmission assembly 122, so that the driving mechanism 12 can be operated efficiently and reliably for a long time.

To solve the problem of how to arrange the transmission assembly on a two-wheeled vehicle, further, as shown in fig. 2-4, the transmission assembly 122 includes a worm 1220, a worm wheel 1221, a rack 1222, a link 1223, a torsion spring mounting arm 1224, and a torsion spring 1225; the fixed end of the worm 1220 is fixed with the motor shaft 1200, and the transmission end of the worm 1220 is meshed with the worm gear 1221; the drive end of worm gear 1221 is engaged with rack 1222; the meshing part of the worm 1220 and the worm wheel 1221 and the meshing part of the worm wheel 1221 and the rack 1222 are both positioned inside the casing 121; one end of the link 1223 is hinged to the rack 1222, and the other end of the link 1223 is hinged to the torsion spring mounting arm 1224; the torsion spring mounting arm 1224 is rotatably connected with the support arm 13, the torsion spring 1225 is disposed in a gap between the torsion spring mounting arm 1224 and the support arm 13, one end of the torsion spring 1225 is fixed on the torsion spring mounting arm 1224, and the other end of the torsion spring 1225 is fixed on the support arm 13; the second through hole 1211 is a guide through hole having both ends opened; the rack 1222 is movably disposed inside the guide through-hole 1211.

The transmission sequence of the driving mechanism 12 for driving the auxiliary wheel 14 to perform the lifting operation:

the motor 120 (motor shaft 1200) → worm 1220 → worm wheel 1221 → rack 1222 → link 1223 → torsion spring mounting arm 1224 → torsion spring 1225 → support arm 13 → auxiliary wheel 14.

The combined structure of the worm 1220, the worm gear 1221 and the rack 1222 converts the rotational kinetic energy of the motor shaft 1200 into the kinetic energy of the lifting movement of the rack 1222;

the link 1223 and the torsion spring installation arm 1224 achieve a reversal of the primary acting force, and since the bottom end of the torsion spring installation arm 1224 is rotatably fixed to the second fixing mechanism 11, the kinetic energy of the up-and-down movement is converted into rotational potential energy of the torsion spring installation arm 1224.

The mounting interference with other parts of the two-wheeled vehicle can be reduced according to the specific shape setting of the two-wheeled vehicle.

The combined structure of the torsion spring mounting arm 1224, the torsion spring 1225, and the support arm 13 enables the rotational potential energy of the torsion spring mounting arm 1224 to be transmitted to the support arm 13 through the torsion spring; the supporting arm 13 rotates around the second fixing mechanism 11 (e.g., the guiding sleeve 113) to drive the auxiliary wheel 14 thereon to perform lifting operation.

The auxiliary wheel device 01 for the two-wheeled vehicle adopting the transmission assembly 122 can be adapted to most two-wheeled vehicles by adjusting parameters according to the body shape of the specific two-wheeled vehicle. Therefore, the auxiliary wheel device 01 for a two-wheeled vehicle using the transmission assembly 122 can be directly attached to most of two-wheeled vehicles on the market without destroying the inherent structure of the two-wheeled vehicle, and has a wide application range.

To facilitate adjustment of the length of the link, further, as shown in fig. 3, the link 1223 includes a sleeve 12230, a threaded rod 12231, and a lock nut 12232; the locking nut 12232 is connected with the threaded rod 12231 through threads, and the sleeve 12230 is fixed with the threaded rod 12231 through threads and the locking nut 12232; the sleeve 12230 is hinged to the rack 1222; the threaded rod 12231 is hinged to the torsion spring mounting arm 1224. By the engagement of the sleeve 12230, the threaded rod 12231, and the lock nut 12232, the actual length of the link 1223 formed by the sleeve 12230 and the threaded rod 12231 can be changed in such a manner as to screw in or screw out the threaded rod 12231. The lifting performance of the auxiliary wheel 14 can be adjusted by adjusting the length of the link 1223.

In order to prevent dust from entering the transmission assembly 122 and causing transmission failure, further, as shown in fig. 2 and 3, the transmission assembly 122 further includes two protection sleeves 1226; the protective sleeve 1226 is sleeved outside the rack 1222, and a joint of the protective sleeve 1226 and the housing 121 is sealed. Can set up the action part of transmission subassembly 122 in a relatively sealed space through protective sheath 1226 to can avoid dust to get into transmission subassembly 122, and then can reduce the transmission failure fault rate, improve transmission subassembly 122's operation reliability.

In order to enable more stable arrangement of the first fixing mechanism on the two-wheeled vehicle, further, as shown in fig. 2 and 3, the first fixing mechanism 10 includes a third mounting plate 101 and a third attachment bolt 102; a part of the third mounting plate 101 is an arc plate 1010; the arc-shaped plate 1010 is matched with one part of the two-wheeled vehicle; the third mounting plate 101 is fixed to the two-wheeled vehicle by a third connecting bolt 102. Since the two-wheeled vehicle generally includes the arc structure, the arc 1010 can better match the shape of the arc structure of the two-wheeled vehicle, so as to increase the contact area between the third mounting plate 101 and the two-wheeled vehicle and improve the mounting stability of the first fixing mechanism 10.

In order to prevent the two-wheeled vehicle from sliding relative to the ground in the parking state, as shown in fig. 2 and 4, the support arm 13 is provided with a support foot 131; the supporting feet 131 are arranged at the free ends of the supporting arms 13; a gap is left between the supporting leg 131 and the auxiliary wheel 14. When the two-wheeled vehicle is about to move relative to the ground, the support legs 131 form sliding friction contact with the ground, which is different from rolling friction contact between the auxiliary wheels 14 and the ground, and the limit-applied external force which can be overcome is larger, so that relative sliding between the two-wheeled vehicle and the ground can be effectively prevented.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. An auxiliary wheel device for a two-wheeled vehicle is characterized by comprising two sets of independently controlled auxiliary wheel assemblies and a second fixing mechanism; each set of auxiliary wheel assembly comprises a first fixing mechanism, a driving mechanism, a supporting arm and an auxiliary wheel;

the first fixing mechanism is used for fixing the fixed end of the driving mechanism on the two-wheeled vehicle;

the second fixing mechanism is used for rotatably fixing the fixed end of the supporting arm on the two-wheeled vehicle;

the driving mechanism is used for driving the auxiliary wheel to lift;

the stiff end of support arm with second fixed establishment rotationally connects, the activity of support arm is served and is set up the auxiliary wheel.

2. An auxiliary wheel apparatus for a two-wheeled vehicle as claimed in claim 1, wherein the number of said second fixing means is 1, said second fixing means being of a unitary fixing structure; the integral fixing structure comprises a first mounting plate, a second mounting plate, two lug plates, a guide sleeve and a connecting bolt which are horizontally arranged; the first mounting plate is arranged right above the second mounting plate; the first mounting plate and the second mounting plate are fixed through the connecting bolts; the two ear plates are vertical and fixed on the lower surface of the second mounting plate; the two ear plates are parallel and are reserved with intervals; mounting through holes are respectively formed in the two ear plates; the guide sleeve horizontally penetrates through the two mounting through holes and is fixed with the mounting through holes; the fixed end of each supporting arm is provided with a supporting arm rotating shaft; the support arm rotating shafts corresponding to the two sets of auxiliary wheel assemblies are respectively inserted at two ends of the guide sleeve, and each support arm rotating shaft can rotate relative to the guide sleeve.

3. A secondary wheel unit for a two-wheeled vehicle as claimed in claim 1, wherein the number of said second fixing means is 2, each of said second fixing means being for rotatably fixing the fixed end of one of said support arms to the two-wheeled vehicle.

4. An auxiliary wheel arrangement for a two wheeled vehicle as claimed in claim 1, wherein the drive mechanism comprises a motor, a housing and a transmission assembly; the shell is provided with a first through hole and a second through hole; the motor comprises a motor shaft;

the motor shaft penetrates through the first through hole and is rotatably arranged in the shell; the transmission assembly penetrates through the second through hole to be in transmission connection with the motor shaft;

the shell is fixed on the first fixing mechanism;

the transmission assembly is in transmission connection with the supporting arm.

5. An auxiliary wheel arrangement for a two-wheeled vehicle according to claim 4, wherein said drive assembly includes a worm, a worm gear, a rack, a link, a torsion spring mounting arm and a torsion spring;

the fixed end of the worm is fixed with the motor shaft, and the transmission end of the worm is meshed with the worm wheel; the transmission end of the worm wheel is meshed with the rack; the meshing position of the worm and the worm wheel and the meshing position of the worm wheel and the rack are both positioned in the shell;

one end of the connecting rod is hinged with the rack, and the other end of the connecting rod is hinged with the torsion spring mounting arm;

the torsion spring mounting arm is rotatably connected with the supporting arm, the torsion spring is arranged in a gap between the torsion spring mounting arm and the supporting arm, one end of the torsion spring is fixed on the torsion spring mounting arm, and the other end of the torsion spring is fixed on the supporting arm;

the second through hole is a guide through hole with openings at two ends; the rack is movably arranged in the guide through hole.

6. An auxiliary wheel apparatus for a two-wheeled vehicle as claimed in claim 5, wherein the link comprises a sleeve, a threaded rod and a lock nut;

the locking nut is connected with the threaded rod through threads, and the sleeve is fixed with the threaded rod through threads and the locking nut;

the sleeve is hinged with the rack; the threaded rod is hinged to the torsion spring mounting arm.

7. An auxiliary wheel arrangement for a two-wheeled vehicle according to claim 5, wherein the transmission assembly further comprises two protective sleeves; the protective sleeve is sleeved outside the rack, and the joint of the protective sleeve and the shell is arranged in a sealing mode.

8. An auxiliary wheel apparatus for a two-wheeled vehicle according to claim 1, wherein said first fixing mechanism includes a third mounting plate and a third connecting bolt;

one part of the third mounting plate is an arc-shaped plate; the arc-shaped plate is matched with one part of the two-wheeled vehicle; the third mounting plate is fixed to the two-wheeled vehicle by the third connecting bolt.

9. An auxiliary wheel arrangement for a two-wheeled vehicle as claimed in claim 1, wherein the support arm is provided with support feet;

the supporting feet are arranged at the free ends of the supporting arms; and a gap is reserved between the supporting leg and the auxiliary wheel.