CN209833834U - Motor vehicle - Google Patents

Abstract

The utility model belongs to the technical field of vehicles, and discloses a motor vehicle which comprises a two-wheeled vehicle body, wherein the rear side of the two-wheeled vehicle body is provided with a rear vehicle frame, two sides of the bottom of the front end of the rear vehicle frame are respectively provided with a universal wheel, the universal wheels are arranged on the rear vehicle frame through an auxiliary wheel frame plate, and the upper end and the lower end of the auxiliary wheel frame plate are respectively articulated with an auxiliary wheel upper frame and an auxiliary wheel lower frame; two ends of the auxiliary wheel upper frame are respectively hinged with an auxiliary wheel upper tail beam; two ends of the auxiliary wheel lower frame are respectively hinged with an auxiliary wheel lower tail beam; one universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the left end and the upper tail beam of the auxiliary wheel through one mounting beam, and the other universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the right end and the upper tail beam of the auxiliary wheel through the other mounting beam. The mounting beam can be in a plumb state under the self gravity of the mounting beam, and when the two-wheeled vehicle body moves forwards, the universal wheels on the two sides play a role in auxiliary support, so that the two-wheeled vehicle body is not easy to topple.

Description

Motor vehicle

Technical Field

The utility model belongs to the technical field of the car, concretely relates to motor vehicle.

Background

The existing two-wheel motor vehicle is unsafe and easy to turn over, and the four-wheel motor vehicle has the defects of complex structure, heavy weight, large volume and high price, and in order to solve the technical problems, the motor vehicle is provided.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems existing in the prior art, the utility model aims to provide a motor vehicle.

The utility model discloses the technical scheme who adopts does:

a motor vehicle comprises a two-wheeled vehicle body, wherein a rear vehicle frame is arranged on the rear side of the two-wheeled vehicle body, two universal wheels are respectively arranged on two sides of the bottom of the front end of the rear vehicle frame, the universal wheels are mounted on the rear vehicle frame through an auxiliary wheel frame plate, and the upper end and the lower end of the auxiliary wheel frame plate are respectively hinged with an auxiliary wheel upper frame and an auxiliary wheel lower frame;

two ends of the auxiliary wheel upper frame are respectively hinged with an auxiliary wheel upper tail beam, and the auxiliary wheel upper tail beam can only downwards rotate relative to the auxiliary wheel upper frame;

two ends of the auxiliary wheel lower frame are respectively hinged with an auxiliary wheel lower tail beam, and the auxiliary wheel lower tail beam can only downwards rotate relative to the auxiliary wheel lower frame;

one universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the left end and the upper tail beam of the auxiliary wheel through one mounting beam, and the other universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the right end and the upper tail beam of the auxiliary wheel through the other mounting beam.

Furthermore, the auxiliary wheel upper frame comprises an auxiliary wheel upper main beam and two auxiliary wheel upper auxiliary beams, the left end and the right end of the auxiliary wheel upper main beam are respectively hinged with an auxiliary wheel upper auxiliary beam and an auxiliary wheel upper tail beam in sequence, and an auxiliary wheel upper sleeve for preventing the auxiliary wheel upper auxiliary beam from rotating at a corresponding hinge point is sleeved on the hinge point of the auxiliary wheel upper main beam and the auxiliary wheel upper auxiliary beam;

the wheel attaching lower frame comprises a wheel attaching lower main beam and two wheel attaching lower auxiliary beams, the left end and the right end of the wheel attaching lower main beam are respectively and sequentially hinged with one wheel attaching lower auxiliary beam and one wheel attaching lower tail beam, and a wheel attaching lower sleeve for preventing the wheel attaching lower auxiliary beam from rotating with a corresponding hinge point is sleeved on the hinge point of the wheel attaching lower main beam and the wheel attaching lower auxiliary beam.

Further, the length of the auxiliary wheel lower main beam is greater than that of the auxiliary wheel upper main beam.

Furthermore, the auxiliary wheel upper sleeve is sleeved on the auxiliary wheel upper auxiliary beam along the length direction of the auxiliary wheel upper auxiliary beam, and the auxiliary wheel lower sleeve is sleeved on the auxiliary wheel lower auxiliary beam along the length direction of the auxiliary wheel lower auxiliary beam.

Furthermore, elastic parts are arranged between the universal wheels and the mounting beam, one universal wheel is correspondingly provided with two groups of elastic parts, and the two groups of elastic parts are positioned on two sides of the corresponding universal wheel.

Furthermore, a folding compartment is arranged on the rear frame.

Furthermore, the folding wagon box comprises two wagon top plates, two wagon bottom plates and wagon outer plates on the left side and the right side, one ends of the two wagon bottom plates are hinged to the left side and the right side of the rear frame, the other ends of the wagon bottom plates are hinged to the inner sides of the bottoms of the wagon outer plates on the same side, the wagon top plates are hinged to the inner sides of the tops of the wagon outer plates on the same side, and the two wagon top plates are detachably connected;

the outer box plate is formed by hinging an outer box upper plate and an outer box lower plate.

Furthermore, the box top plate is of a channel steel structure, one box top plate is inserted into a groove of the other box top plate, and the two box top plates are detachably connected through a bolt.

The utility model has the advantages that:

the mounting beam can be in a plumb state under the self gravity of the mounting beam, and when the two-wheeled vehicle body moves forwards, the universal wheels on the two sides play a role in auxiliary support, so that the two-wheeled vehicle body is not easy to topple; when the two-wheeled automobile body inclines, the universal wheel of both sides and the front wheel and the rear wheel of two-wheeled automobile body form four strong points, are similar to stable four-wheeled vehicle (nevertheless the utility model discloses a four-wheeled vehicle compares with the motor four-wheeled vehicle like the car, possesses simple structure, weight is little, small and advantage with low costs), makes the utility model discloses a motor vehicle is difficult to empty about, and this motor vehicle is when turning, because of the universal wheel ground restriction of the symmetry setting of both sides, the motor vehicle can control the slope in safety range.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the wheel-attached upper frame and the wheel-attached lower frame of the present invention.

Fig. 3 is a schematic view of the universal wheel of the present invention for keeping the plumb bob in suspension.

Fig. 4 is a rear schematic view of the folding wagon of the present invention.

Fig. 5 is a schematic structural view of the foldable wagon box of the present invention after being folded.

In the figure: 1-two-wheeled vehicle body; 101-front wheel; 102-a rear wheel; 2-turning a rear frame; 21-channel steel plate; 22-an auxiliary wheel frame plate; 3-universal wheels; 31-attaching a wheel upper main beam; 32-attaching a wheel upper auxiliary beam; 33-attaching a wheel and mounting a tail beam; 34-an auxiliary wheel upper sleeve; 35-a lower main beam with wheels; 36-auxiliary wheel lower auxiliary beam; 37-an auxiliary wheel lower tail beam; 38-wheel-attached lower sleeve; 39-mounting the beam; 41-box top plate; 42-box bottom plate; 43-outer upper plate of the box; 44-outer lower box panel; 45-half beam frame; 51-front upper door; 53-back upper door; 54-rear lower door.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a motor vehicle of the present embodiment includes a two-wheeled vehicle body 1 having a structure similar to that of a bicycle body and including a front wheel 101 and a rear wheel 102, a rear frame 2 provided on a rear side of the two-wheeled vehicle body, a universal wheel 3 provided on each of both sides of a bottom portion of a front end of the rear frame, the universal wheels being mounted on the rear frame 2 via an auxiliary wheel frame plate 22, the auxiliary wheel frame plate being mounted on the rear frame, and an upper auxiliary wheel frame and a lower auxiliary wheel frame being respectively hinged to upper and lower ends of the auxiliary wheel frame plate 22; when the universal wheel is used, the upper frame and the lower frame of the auxiliary wheel are in a horizontal state.

As shown in fig. 2, the wheel-attached upper frame specifically includes a wheel-attached upper main beam 31 and two wheel-attached upper auxiliary beams 32, the left and right ends of the wheel-attached upper main beam are respectively hinged with a wheel-attached upper auxiliary beam 32 and a wheel-attached upper tail beam 33 in sequence, and a wheel-attached upper sleeve 34 for preventing the wheel-attached upper auxiliary beam from rotating at a corresponding hinge point is sleeved on the hinge point of the wheel-attached upper main beam and the wheel-attached upper auxiliary beam; when in use, the sleeve on the auxiliary wheel is sleeved outside the corresponding hinge point, so that the main beam on the auxiliary wheel and the auxiliary beams on the auxiliary wheels at two sides are kept horizontal, namely the upper frame of the auxiliary wheel is kept horizontal (see figure 2); the wheel-attached lower frame comprises a wheel-attached lower main beam 35 and two wheel-attached lower auxiliary beams 36, the left end and the right end of the wheel-attached lower main beam are respectively hinged with a wheel-attached lower auxiliary beam and a wheel-attached lower tail beam 37 in sequence, a wheel-attached lower sleeve 38 for preventing the wheel-attached lower auxiliary beams from rotating with corresponding hinge points is sleeved on the hinge points of the wheel-attached lower main beam and the wheel-attached lower auxiliary beams, and the wheel-attached lower sleeves are sleeved outside the corresponding hinge points during use to enable the wheel-attached lower main beam and the wheel-attached lower auxiliary beams on the two sides to be kept horizontal, namely the wheel-attached lower frame is kept horizontal (see fig. 2).

One universal wheel is sequentially hinged on the left-end lower tail beam and the left-end upper tail beam through a mounting beam 39 (when the universal wheel is actually mounted and used, the mounting beam belongs to one part of the universal wheel, and the separate description is convenient for explanation), and the other universal wheel is sequentially hinged on the right-end lower tail beam and the left-end upper tail beam through the other mounting beam. In this embodiment, attach the wheel and put on the shelf and attach the wheel and go up the tail-beam and be the rectangular steel structure, attach the both ends of taking turns to auxiliary girder 32 (rectangular steel) and set up the channel-section steel, attach the wheel and go up the auxiliary girder and be close to the channel-section steel opening that attaches the one end of taking turns to the tail-beam down, attach the articulated cover of channel-section steel that takes turns to the auxiliary girder and establish on attaching the wheel and go up the tail-beam for attach the wheel and go up the tail-beam only can for attach the wheel and put.

Similarly, the lower auxiliary wheel frame and the lower auxiliary wheel tail beam are both of rectangular steel structures, channel steel is arranged at two ends of the lower auxiliary wheel beam (the rectangular steel), the opening of the channel steel, close to one end of the lower auxiliary wheel tail beam, of the lower auxiliary wheel beam faces downwards, and the channel steel of the lower auxiliary wheel beam is hinged and sleeved on the lower auxiliary wheel tail beam, so that the lower auxiliary wheel tail beam can only rotate downwards relative to the lower auxiliary wheel frame. When two universal wheels are flatly placed on the ground, the tail beam on the attached wheel and the tail beam under the attached wheel cannot continue to rotate downwards from the horizontal direction due to the upward supporting effect of the two universal wheels, so that the tail beam on the attached wheel and the tail beam under the attached wheel can be kept in the horizontal state, the mounting beam can be in a plumb state due to the self gravity of the mounting beam, and when the two-wheel vehicle body moves forwards, the universal wheels on two sides play an auxiliary supporting effect, so that the two-wheel vehicle body is not easy to topple.

The wheel-attached upper frame, the wheel-attached lower frame, the wheel-attached upper tail beam and the wheel-attached lower tail beam are all in rectangular steel structures, so that the overall structural strength is higher, and the safety of the motor vehicle is better guaranteed.

When the two-wheeled vehicle body inclines to the left by a certain angle, such as 15 degrees, under the action of centrifugal force, the gravity centers of the two-wheeled vehicle body and people and objects on the two-wheeled vehicle body can move leftwards and descend, and the gravity center descending is favorable for improving the safety and stability; the tail boom on the auxiliary wheel and the tail boom under the auxiliary wheel on right side can the lapse under the action of gravity (the auxiliary wheel goes up the tail boom only can for the auxiliary wheel upper carriage rotates downwards, the auxiliary wheel tail boom only can for the auxiliary wheel undercarriage rotates downwards), drive the universal wheel on right side and fall subaerial, universal wheel, left universal wheel on right side (when the automobile body leaned left, left universal wheel also is the state of landing) and the front wheel and the rear wheel of two-wheeled automobile body form four strong points, and four strong points are similar to stable four-wheeled vehicle, make the utility model discloses a motor vehicle is difficult for empting left. Similarly, when the two-wheeled vehicle body inclines rightwards for a certain angle, such as 15 degrees, under the action of centrifugal force, the gravity centers of the two-wheeled vehicle body and people and objects on the two-wheeled vehicle body can move rightwards and descend, and the gravity center descending is beneficial to improving the safety and stability; the left tailboom that attaches on the wheel and attaches under the wheel the tailboom can the rotation downwards under the action of gravity, drives left universal wheel and falls subaerial, and left universal wheel, the universal wheel on right side (when the automobile body inclines right, the universal wheel on right side also is the state of landing) and the front wheel of two-wheeled automobile body and rear wheel form four strong points, are similar to stable four-wheel car, make the utility model discloses a motor vehicle is difficult for empting right, and this motor vehicle is when the turn, because of the universal wheel ground restriction of the symmetry setting of both sides, the motor vehicle can incline about in the safety range.

Example 2:

on the basis of embodiment 1, the length of the auxiliary wheel lower main beam in this embodiment is greater than that of the auxiliary wheel upper main beam, so that the universal wheel can be folded, and in order to facilitate folding and use, in this embodiment, the channel steel opening at one end of the auxiliary wheel upper auxiliary beam close to the auxiliary wheel upper main beam faces upward, and the channel steel of the auxiliary wheel upper auxiliary beam is hinged and sleeved on the auxiliary wheel upper main beam, so that the auxiliary wheel upper auxiliary beam can only rotate upward relative to the auxiliary wheel upper main beam; similarly, the channel steel opening of one end of the auxiliary wheel lower auxiliary beam close to the auxiliary wheel lower main beam faces upwards, and the channel steel of the auxiliary wheel lower auxiliary beam is hinged and sleeved on the auxiliary wheel lower main beam, so that the auxiliary wheel lower auxiliary beam can only rotate upwards relative to the auxiliary wheel lower main beam.

As shown in fig. 3, the auxiliary wheel upper sleeve is displaced towards the auxiliary wheel upper tail beam to enable the auxiliary wheel upper beam to rotate, then the auxiliary wheel upper beams on the two sides are rotated upwards until the auxiliary wheel upper beam is vertical to the auxiliary wheel upper main beam, the auxiliary wheel upper tail beam is driven to rotate to the horizontal, and the mounting beam keeps a plumb state due to the action of gravity; similarly, will attach a round of lower sleeve and make and attach a round of lower auxiliary girder rotatable towards attaching a round of lower tail boom displacement, upwards rotate attaching a round of lower auxiliary girder of both sides to attach a round of lower auxiliary girder and attach a round of lower girder and be perpendicular, can drive and attach a round of lower tail girder and rotate to the level, make the installation roof beam keep the plummet state because of the action of gravity equally, just so can make the universal wheel of both sides keep the plummet unsettled state (as shown in fig. 3), can the utility model discloses a when the motor vehicle parks, it is unsettled with the universal wheel according to foretell operation process, then put down the stand of this motor vehicle, make this motor vehicle can steadily stop subaerial.

Still install vehicle event data recorder on the two-wheeled automobile body, install vehicle event data recorder's display ware the utility model discloses a on the handlebar of motor vehicle, the monitor is fixed on the monitor pole of car back seat, is convenient for record motor vehicle's driving process, supervises to comply with the guard, the accident analysis of being convenient for.

The auxiliary wheel upper sleeve is sleeved on the auxiliary wheel upper beam along the length direction of the auxiliary wheel upper beam, the auxiliary wheel lower sleeve is sleeved on the auxiliary wheel lower beam along the length direction of the auxiliary wheel lower beam, the auxiliary wheel upper sleeve can be displaced along the length direction of the auxiliary wheel upper beam, the auxiliary wheel upper sleeve can be conveniently displaced as required, when a motor vehicle runs, the auxiliary wheel upper sleeve is displaced to be sleeved at the corresponding hinge point to prevent the auxiliary wheel upper beam from rotating by the corresponding hinge point, and the auxiliary wheel lower sleeve is displaced to be sleeved at the corresponding hinge point to prevent the auxiliary wheel lower beam from rotating by the corresponding hinge point; when the motor vehicle is parked, the auxiliary wheel upper sleeve can be displaced towards the auxiliary wheel upper tail beam to enable the auxiliary wheel upper beam to rotate, and the auxiliary wheel lower sleeve can be displaced towards the auxiliary wheel lower tail beam to enable the auxiliary wheel lower beam to rotate, so that the two suspended universal wheels can be folded.

And elastic parts are arranged between the universal wheels and the mounting beam, one universal wheel is correspondingly provided with two groups of elastic parts, and the two groups of elastic parts are positioned on two sides of the corresponding universal wheel. When the motor vehicle runs, the obstacle of small stones and the like can be encountered, and the arranged elastic component can reduce the distance between the universal wheel and the mounting beam, so that the motor vehicle can conveniently run on a bumpy road surface.

Example 3:

on embodiment 1 or 2 basis, in this embodiment be equipped with folding railway carriage on the car after-frame, can with the utility model discloses a motor vehicle is applied to fields such as express delivery car, can place folding railway carriage with the parcel in, and the express delivery transportation back that finishes can draw in folding with folding railway carriage in, reduces the utility model discloses an occupation space of motor vehicle. As shown in fig. 4, folding railway carriage includes the boxboard of two roof boards 41, two bottom of the case boards 42 and the left and right sides, still includes two preceding upper doors and two back doors, just so can make folding railway carriage just can enclose synthetic cuboid cavity through the boxboard of two preceding door plant, two back doors, roof board, the left and right sides and two bottom of the case boards, makes the utility model discloses a freight can be loaded to the motor vehicle, is convenient for the utility model discloses a motor vehicle is applied to fields such as express delivery car.

Two bottom plates of the box can be hinged on the left side and the right side of the lower end of the rear frame through a groove steel plate 21, the two box top plates 41 are detachably connected, the two box top plates can be detachably connected through a bolt, and the two box top plates are horizontally connected into a whole through the bolt during use, so that the use is convenient. The box roof board is the channel-section steel structure, and during the use, one of them box roof board can crisscross insert establish in the groove of another box roof board, then through bolt detachably connection.

In order to improve the bearing capacity of the folding wagon box, a cross beam frame can be horizontally hinged between the left side and the right side of the outer box lower plate, the cross beam frame is formed by hinging two half cross beam frames 45, when the folding wagon box is convenient to fold, the half cross beam frames are also of channel steel structures, when the folding wagon box is folded, one half cross beam frame is inserted into a groove of the other half cross beam frame, and the overlapped parts of the two half cross beam frames can be detachably connected through bolts.

One ends of the two box bottom plates are hinged to the left side and the right side of the lower end of the rear frame, the other ends of the box bottom plates are hinged to the inner sides of the bottoms of the box outer plates on the same side, the box top plates are hinged to the inner sides of the tops of the box outer plates on the same side, and the two box top plates 41 are detachably connected; the outer box plate is formed by hinging an outer box upper plate 43 and an outer box lower plate 44. After the motor vehicle of the utility model is used for sending packages, when the motor vehicle is not used, the folding carriage can be folded, two bolts fixedly connecting two back doors can be pulled out firstly, then the two back doors are opened, then the bolts of the carriage top plate are pulled out to separate the two carriage top plates, two carriage outer plates and two carriage bottom plates 42 are lifted upwards by two hands, the carriage bottom plates at two sides can be rotated upwards and oppositely to be in a vertical state, the carriage outer lower plates 44 at two sides are driven to rotate oppositely to be in a vertical state, the carriage outer upper plates 43 at two sides are driven to rotate backwards and are folded towards the carriage outer lower plate 44 at the same side, and the two carriage top plates 41 are driven to be folded towards the carriage outer lower plate at the same side (as shown in fig. 5); the two rear doors can be correspondingly overlapped and inserted with two bolts, so that a large closed delivery wagon box can be folded and folded into a small wagon box, the occupied space of the folding wagon box is reduced, and the folding wagon box is convenient to store and park. Two cross beam frames are horizontally hinged between the left side and the right side of the outer box lower plate, when the folding wagon box is folded, the two cross beam frames can be correspondingly overlapped, and then the cross beam frames are folded and fixed by inserting the bolts.

For convenient storage, the front upper door consists of a left front upper door and a right front upper door 51, one front upper door is hinged at the front outer end of the left box outer upper plate, the other front upper door is hinged at the front outer end of the right box outer upper plate, and the left front upper door and the right front upper door can be fixed by bolts at the overlapping position. The rear door is composed of two rear upper doors 53 and two rear lower doors 54.

In the same way, one rear upper door is hinged to the rear end of the left box outer upper plate, the other rear upper door is hinged to the rear end of the right box outer upper plate, and the left rear upper door and the right rear upper door can be fixed at the overlapping position by bolts.

Similarly, one rear lower door is hinged to the rear inner end of the left outer box lower plate, the other rear lower door is hinged to the rear inner end of the right outer box lower plate 44, and the left rear lower door and the right rear lower door can be fixed at the overlapping position by bolts.

Similarly, one half beam frame is hinged to the upper inner top side of the left outer box lower plate, the other half beam frame is hinged to the upper inner top side of the right outer box lower plate 44, and the left half beam frame and the right half beam frame can be fixed at the overlapping position by bolts.

When the folding compartment is to be folded, the bolt between the two front upper doors and the two rear upper doors can be pulled down, and the front upper door on the left side and the front upper door on the right side are respectively turned over outwards by 270 degrees and positioned at the front outer side of the corresponding compartment outer upper plate; similarly, the rear upper door on the left side and the rear upper door on the right side are respectively turned outwards by 270 degrees and are positioned on the rear outer side of the upper plate outside the box; then, turning the inner sides of the box outer upper plates corresponding to the box top plates on the left side and the right side by 90 degrees for fixing; then the left and right outer upper plates of the box are turned outwards by 180 degrees and are attached to the outer sides of the outer lower plates of the box at the same side; pulling out the bolt between the two rear lower doors, opening the rear lower doors, pulling out the bolt between the two half cross beam frames, lifting the outer lower plates and the two box bottom plates at the left and right sides upwards by two hands, and fixing the overlapped parts of the two half cross beam frames by the bolts; and finally, the two rear lower doors are closed, so that a large closed delivery wagon box is folded and folded into a small wagon box, the occupied space of the folding wagon box is reduced, and the folding wagon box is convenient to store and park.

In a word, the utility model discloses a motor vehicle is on original two-wheeled motor vehicle's rear truck, through two universal wheels of symmetry setting in rear truck both sides, makes the motor vehicle become one can control the box express delivery motor vehicle of four-wheel of safe slope, through traditional handlebar, controls to turn to about it, and the automobile body can incline in safe angle under the effect of centrifugal force when turning, and people and thing in the car can askew fall along with the slope, make automobile body, people and thing can incline in safety range.

It is worth noting that the hollow circles in the drawings 2-5 of the specification are all hinge points.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims (8)

1. A motor vehicle, characterized by: the rear frame is arranged on the rear side of the two-wheeled vehicle body, two universal wheels are respectively arranged on two sides of the bottom of the front end of the rear frame, the universal wheels are mounted on the rear frame through an auxiliary wheel frame plate, and the upper end and the lower end of the auxiliary wheel frame plate are respectively hinged with an auxiliary wheel upper frame and an auxiliary wheel lower frame;

two ends of the auxiliary wheel upper frame are respectively hinged with an auxiliary wheel upper tail beam, and the auxiliary wheel upper tail beam can only downwards rotate relative to the auxiliary wheel upper frame;

two ends of the auxiliary wheel lower frame are respectively hinged with an auxiliary wheel lower tail beam, and the auxiliary wheel lower tail beam can only downwards rotate relative to the auxiliary wheel lower frame;

one universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the left end and the upper tail beam of the auxiliary wheel through one mounting beam, and the other universal wheel is sequentially hinged to the lower tail beam of the auxiliary wheel at the right end and the upper tail beam of the auxiliary wheel through the other mounting beam.

2. The motor vehicle of claim 1, wherein: the auxiliary wheel upper frame comprises an auxiliary wheel upper main beam and two auxiliary wheel upper auxiliary beams, the left end and the right end of the auxiliary wheel upper main beam are respectively hinged with an auxiliary wheel upper auxiliary beam and an auxiliary wheel upper tail beam in sequence, and an auxiliary wheel upper sleeve for preventing the auxiliary wheel upper auxiliary beam from rotating at a corresponding hinge point is sleeved on the hinge point of the auxiliary wheel upper main beam and the auxiliary wheel upper auxiliary beam;

the wheel attaching lower frame comprises a wheel attaching lower main beam and two wheel attaching lower auxiliary beams, the left end and the right end of the wheel attaching lower main beam are respectively and sequentially hinged with one wheel attaching lower auxiliary beam and one wheel attaching lower tail beam, and a wheel attaching lower sleeve for preventing the wheel attaching lower auxiliary beam from rotating with a corresponding hinge point is sleeved on the hinge point of the wheel attaching lower main beam and the wheel attaching lower auxiliary beam.

3. The motor vehicle of claim 2, wherein: the length of the auxiliary wheel lower main beam is greater than that of the auxiliary wheel upper main beam.

4. A motor vehicle according to claim 3, wherein: the auxiliary wheel upper sleeve is sleeved on the auxiliary wheel upper auxiliary beam along the length direction of the auxiliary wheel upper auxiliary beam, and the auxiliary wheel lower sleeve is sleeved on the auxiliary wheel lower auxiliary beam along the length direction of the auxiliary wheel lower auxiliary beam.

5. The motor vehicle of claim 4, wherein: and elastic parts are arranged between the universal wheels and the mounting beam, one universal wheel is correspondingly provided with two groups of elastic parts, and the two groups of elastic parts are positioned on two sides of the corresponding universal wheel.

6. The motor vehicle according to any one of claims 1 to 5, characterized in that: and a folding compartment is arranged on the rear frame.

7. The motor vehicle of claim 6, wherein: the foldable wagon box comprises two wagon top plates, two wagon bottom plates and wagon outer plates on the left side and the right side, one ends of the two wagon bottom plates are hinged to the left side and the right side of the rear frame, the other ends of the wagon bottom plates are hinged to the inner bottom sides of the wagon outer plates on the same side, the wagon top plates are hinged to the inner top sides of the wagon outer plates on the same side, and the two wagon top plates are detachably connected;

the outer box plate is formed by hinging an outer box upper plate and an outer box lower plate.

8. The motor vehicle of claim 7, wherein: the box top plate is of a channel steel structure, one box top plate is inserted into a groove of the other box top plate, and the two box top plates are detachably connected through a bolt.