CN223720977U - Vehicle - Google Patents

Abstract

The utility model discloses a carrier, which comprises a frame main body, a first wheel assembly and a second wheel assembly, wherein the frame main body is provided with a chassis provided with a connecting structure, the first wheel assembly comprises a first wheel seat provided with a first matching structure and a first wheel body which is rotationally arranged on the first wheel seat around a first axial lead, the second wheel assembly comprises a second wheel seat provided with a second matching structure and a second wheel body which is rotationally arranged on the second wheel seat around a second axial lead and has a diameter larger than that of the first wheel body, the carrier is provided with a first state and a second state, the first wheel assembly is connected with the frame main body in the first state, the chassis and the first axial lead have a first interval in the vertical direction, the second wheel assembly is connected with the frame main body in the second state, the chassis and the second axial lead have a second interval in the vertical direction, and the first interval is larger than the second interval, the applicable scene of the carrier is enriched, and the height of the frame main body can be basically kept unchanged.

Description

Carrier tool

Technical Field

The present utility model relates to a carrier.

Background

In the prior art, the moving speed of part of the carriers is slower in the using process, such as a child cart, a cargo cart and the like, the size of the wheel assemblies is usually smaller, and the moving speed of part of the carriers is faster in the using process, such as a running vehicle, a bicycle trailer and the like, and the size of the wheel assemblies is usually larger. Some carriers are used for changing the use mode of the carrier by mounting a wheel assembly with a larger size on a frame of a carrier such as a cart, but after mounting the wheel assembly with a larger size on the frame, the frame is often lifted upwards, so that the center of gravity of the carrier moves upwards, and the stability of the carrier carrying the articles is reduced.

Disclosure of utility model

The utility model aims to provide a novel carrier.

In order to achieve the purpose, the technical scheme adopted by the utility model is that the carrier comprises:

The frame comprises a frame body, wherein the frame body is provided with a bottom frame, and a connecting structure is arranged on the bottom frame;

the first wheel assembly comprises a first wheel seat and a first wheel body which is rotatably arranged on the first wheel seat around a first axial lead, and a first matching structure which can be detachably connected with the connecting structure is arranged on the first wheel seat;

The second wheel assembly comprises a second wheel seat and a second wheel body which is rotationally arranged on the second wheel seat around a second axial line, the diameter of the second wheel body is larger than that of the first wheel body, a second matching structure which can be detachably connected with the connecting structure is arranged on the second wheel seat,

The carrier has a first state in which the first wheel assembly is connected with the frame body, and a second state in which the second wheel assembly is connected with the frame body,

In the first state, the first matching structure and the connecting structure are mutually matched and connected, so that the first distance is reserved between the underframe and the first axial lead in the vertical direction, and in the second state, the second matching structure and the connecting structure are mutually matched, and the second distance is reserved between the underframe and the second axial lead in the vertical direction, wherein the first distance is larger than the second distance.

In some embodiments, the connection structure includes a plug extending downward from the chassis, the plug being connectable with the first mating structure or with the second mating structure.

In some embodiments, the first mating structure includes a connector extending from the first wheel base toward the direction in which the plug is located, and a mating structure is disposed between the connector and the plug, where a length of a mating body formed after the connector and the plug are mated is greater than a length of either the connector or the plug.

In some embodiments, the engagement structure includes an engagement groove provided on one of the connector and the plug, the other being capable of being matingly inserted in the engagement groove, wherein the depth of the engagement groove is smaller than the length of the connector and the length of the plug.

In some embodiments, the second mating structure is a socket groove provided on the second wheel seat, and at least part of the plug connector can be fittingly inserted in the socket groove.

In some embodiments, the second wheel seat is provided with a protruding part integrally arranged towards the extending direction of the plug connector, the plug groove is arranged on the protruding part, and the protruding part extends towards the direction away from the plug connector.

In some embodiments, the plug is integrally located above the first axis when the plug is mated with the first mating structure, and at least partially located below the second axis when the plug is mated with the second mating structure.

In some embodiments, the plug connector gradually extends backwards and obliquely from top to bottom, and the first matching structure and the second matching structure are respectively detachably matched and connected with the plug connector along the length extending direction of the plug connector.

In some embodiments, the first wheel seat and the first wheel body in the first wheel assembly are respectively provided with two wheels which are arranged at intervals along the extending direction of the first axial line, and the second wheel seat and the second wheel body in the second wheel assembly are respectively provided with two wheels which are arranged at intervals along the extending direction of the second axial line, wherein the first matching structure, the second matching structure and the connecting structure are respectively provided with two groups which are arranged at intervals, and the distance between the two groups of the first matching structures, the distance between the two groups of the second matching structures and the distance between the two groups of the connecting structures are the same.

In some embodiments, the first wheel assembly includes a first connecting arm secured between two of the first wheel mounts such that the first wheel assembly is integrally attachable to and detachable from the frame body;

The second wheel assembly comprises a second connecting arm fixedly arranged between the two second wheel seats, so that the second wheel assembly can be integrally connected with the frame main body or detached from the frame main body.

In some embodiments, the carrier is substantially the same height in the vertical direction in the first state as in the second state.

In some embodiments, the connecting structure is disposed at the rear portion of the frame body, the carrier further comprises a push rod frame, a traction rod and a third wheel assembly, the push rod frame is movably connected to the frame body, the push rod frame has an open position relative to the frame body and a folded position relative to the frame body, the traction rod and the third wheel assembly are respectively and detachably connected with the frame body, the carrier is in a first state, the third wheel assembly is mounted at the bottom front portion of the frame body, the first wheel assembly is mounted at the bottom rear portion of the frame body, the push rod frame is in an open position, the traction rod is folded relative to the frame body or detached from the frame body, the carrier is in a second state, the third wheel assembly is mounted at the bottom rear portion of the frame body relative to the frame body or detached from the frame body, the push rod frame is in a folded position, and the traction rod extends forwards from the front portion of the frame body.

In some embodiments, the frame body further includes a frame enclosure assembly disposed on the chassis, and the frame enclosure assembly encloses a frame-shaped load-bearing space above the chassis.

Compared with the prior art, the vehicle has the advantages that the vehicle is provided with the first wheel component and the second wheel component which can be used alternatively, and a user can connect the first wheel component or the second wheel component on the vehicle frame main body according to different use scenes or different use requirements, so that the use scenes of the vehicle are enriched, and the waste of resources is avoided. Meanwhile, the first interval is larger than the second interval, so that the heights of the vehicle frame main bodies in the vertical direction are basically the same in the first state and the second state, the vehicle frame main bodies are prevented from being excessively lifted or lowered after the wheel assemblies are replaced, and the stability of the vehicle for bearing articles is prevented from being influenced.

Drawings

FIG. 1 is a schematic perspective view of a carrier according to an embodiment of the present utility model in a first state;

FIG. 2 is a partially exploded view of FIG. 1;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

Fig. 4 is a schematic perspective view of the carrier in the second state according to the present embodiment;

FIG. 5 is a partially exploded view of FIG. 4;

FIG. 6 is an enlarged schematic view of FIG. 5 at B;

FIG. 7 is a schematic perspective view of a portion of the structure of FIG. 4;

FIG. 8 is a partially exploded view of the mount of the present embodiment;

Wherein 110, an underframe, 120, a mounting seat, 121, a mounting hole, 130, a plug, 140, an upper surrounding frame, 141, a first surrounding rod, 142, a second surrounding rod, 150, a supporting frame;

210. first wheel assembly 211, first wheel seat 212, first wheel body 213, connector 214, joint groove 215, first connecting arm 220, second wheel assembly 221, second wheel seat 2210, wheel seat main body 2211, protruding part 2212, connecting part 222, second wheel body 223, inserting groove 224, second connecting arm;

300. a third wheel assembly 310, a wheel frame 320, a wheel axle 330, a third wheel body;

400. Traction rod 410, rod main body 420, plug-in connection part 430, connecting piece;

500. the push rod frame, 510, push rod, 520, push rod;

610. Linkage rod 620, sliding piece.

Detailed Description

The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments so that advantages and features of the present utility model will be more readily understood by those skilled in the art. It should be apparent that the described embodiments of the utility model are only some, but not all, embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which a person skilled in the art would obtain without making any inventive effort, are within the scope of the utility model.

Referring to fig. 1 and 4, a vehicle includes a frame body, a first wheel assembly 210, and a second wheel assembly 220. The frame body is provided with a chassis 110, and a connecting structure is arranged on the chassis 110. The first wheel assembly 210 includes a first wheel seat 211, and a first wheel body 212 rotatably disposed on the first wheel seat 211 around a first axis X1, and a first mating structure detachably connected to the connecting structure is disposed on the first wheel seat 211. The second wheel assembly 220 includes a second wheel seat 221, and a second wheel body 222 rotatably disposed on the second wheel seat 221 around a second axis line X2, wherein a diameter of the second wheel body 222 is larger than that of the first wheel body 212, and a second mating structure detachably connected with the connecting structure is disposed on the second wheel seat 221. The first wheel assembly and the second wheel assembly may be used interchangeably, and a user may attach the first wheel assembly 210 or the second wheel assembly 220 to the frame body according to different usage situations or different usage requirements.

The vehicle has a first state in which the first wheel assembly 210 is connected to the frame body, and a second state in which the second wheel assembly 220 is connected to the frame body. In the first state, the movement and turning of the vehicle is more flexible due to the smaller size of the first wheel assembly 210. The larger size of the second wheel assembly 220 provides better grip, better stability of the vehicle at higher speeds of movement, and longer service life. Therefore, in the second state, the carrier is suitable for a scene with high moving speed and high stability requirement or high durability requirement on the wheel assembly, for example, the carrier in the state is suitable for being fixed behind a bicycle or other movable vehicles, driven by the bicycle or other movable vehicles and used as a trailer.

In the first state, the first mating structure and the connecting structure are mated and connected with each other, so that the chassis 110 and the first axis X1 have a first distance in the vertical direction. In the second state, the second mating structure and the connecting structure are mated with each other, such that the chassis 110 and the second axis line X2 have a second spacing in the vertical direction. The first interval is greater than the second interval, so that the height of the bottom surface of the frame body in the vertical direction is basically the same in the first state as that in the second state, and the frame body is prevented from being excessively lifted after the first wheel assembly 210 is replaced by the second wheel assembly 220 or from being excessively lowered after the second wheel assembly 220 is replaced by the first wheel assembly 210, thereby avoiding affecting the bearing stability.

Specifically, the connection structure includes a plug 130 protruding downward from the chassis 110, and the plug 130 can be connected to the first mating structure or connected to the second mating structure. When the plug 130 is matched with the first matching structure, the plug 130 is integrally located above the first axis X1, and when the plug 130 is matched with the second matching structure, at least part of the plug 130 is located below the second axis X2. In this way, the effect of reducing the interval between the second axis X2 and the chassis 110, that is, reducing the second interval, is achieved, so that when the second wheel assembly 220 is cooperatively connected with the connecting structure, the chassis 110 will not excessively lift upwards, so that the height of the carrier in the vertical direction is substantially the same in the first state and the second state.

In this embodiment, the first mating structure includes a connecting body 213 protruding from the first wheel seat 211 toward the plug 130, as shown in fig. 3, the connecting body 213 protrudes upward from the first wheel seat 211, a mating structure is disposed between the connecting body 213 and the plug 130, and when the connecting body 213 and the plug 130 are mated with each other, the length of the formed mating body is greater than the length of either the connecting body 213 or the plug 130. Specifically, the engagement structure includes an engagement groove 214, where the engagement groove 214 is provided on one of the connector 213 and the plug 130, and the other can be fittingly inserted into the engagement groove 214, and the depth of the engagement groove 214 is smaller than the length of the connector 213 and the length of the plug 130. Referring to fig. 6, in the present embodiment, the second mating structure is a mating groove 223 disposed on the second wheel base 221, and at least part of the plug 130 can be fittingly inserted into the mating groove 223. In this embodiment, as shown in fig. 7, the plug 130 gradually extends backward from top to bottom, and the first mating structure and the second mating structure are detachably connected with the plug 130 along the extending direction of the length of the plug 130.

Referring to fig. 3, in the present embodiment, the engaging groove 214 is disposed on the connecting body 213, the connecting body 213 extends obliquely upward and forward from the first wheel seat 211, the engaging groove 214 also extends gradually obliquely forward from bottom to top, and the engaging groove 214 is located entirely above the first axis X1. In the present embodiment, the insertion groove 223 extends downward and backward from above the second axis line X2, and the insertion groove 223 extends to the rear side of the second axis line X2 and extends to the lower side of the second axis line X2. So that when the plug 12 is inserted into the insertion groove 223, at least a portion of the plug 130 is located below the second axis X2.

In this embodiment, as shown in fig. 6, the second wheel seat 221 is provided with a protrusion 2211 integrally disposed in a direction perpendicular to the extending direction of the socket 130, the socket 223 is disposed on the protrusion 2211, and the protrusion 2211 extends in a direction away from the socket 130. Specifically, the second wheel base 221 includes a wheel base body 2210, the protrusion 2211 extends backward from the wheel base body 2210, the second wheel base 221 further includes a connection portion 2212 extending in a left-right direction, the connection portion 2212 extends from the wheel base body 2210 to an outside of the frame body, and the second wheel body 222 is rotatably connected to an end portion of the connection portion 2212 away from the wheel base body 2210. Referring to fig. 6, the protruding portion 2211 extends from above the connection portion 2212 to the rear side of the connection portion 2212.

In the present embodiment, the first wheel base 211 and the first wheel body 212 of the first wheel assembly 210 have two spaced apart along the extending direction of the first axis X1, and the second wheel base 221 and the second wheel body 222 of the second wheel assembly 220 have two spaced apart along the extending direction of the second axis X2. The first matching structures, the second matching structures and the connecting structures are all provided with two groups which are arranged at intervals, and the distance between the two groups of first matching structures, the distance between the two groups of second matching structures and the distance between the two groups of connecting structures are the same.

In this embodiment, the first wheel assembly 210 includes a first connecting arm 215 fixed between two first wheel seats 211, so that the first wheel assembly 210 can be integrally connected to or detached from the frame body. In this embodiment, the second wheel assembly 220 includes a second connecting arm 224 fixed between two second wheel seats 221, so that the second wheel assembly 220 can be integrally connected to or detached from the frame body.

In this embodiment, the connection structure is disposed at the rear portion of the frame body, and the carrier further includes a push rod frame 500, a traction rod 400, and a third wheel assembly 300. The push rod frame 500 is movably connected to the frame body, and the push rod frame 500 has an open position opened relative to the frame body and a folded position folded relative to the frame body, and the traction rod 400 and the third wheel assembly 300 are respectively and foldably connected to the frame body.

The vehicle is in a first state, the third wheel assembly 300 is mounted at the bottom front part of the frame body, the first wheel assembly 210 is mounted at the bottom rear part of the frame body, the push rod frame 500 is in an open position, the traction rod 400 is folded relative to the frame body or detached from the frame body, in this state, the first wheel assembly 210 and the third wheel assembly 300 together maintain the stability of the frame body, and the vehicle can be used as a single-use cart or trailer for carrying goods or children.

In the second state, the third wheel assembly 300 is folded or detached from the frame body, the second wheel assembly 220 is mounted at the bottom rear portion of the frame body, the push rod frame 500 is in the folded position, and the traction rod 400 extends forward from the front portion of the frame body. In this state, the carrier may be fixed to the rear of a bicycle or other movable vehicle by the drawbar 400.

In this embodiment, the front part of the frame body is fixedly provided with the mounting seat 120, one end of the drawbar 400 can be detachably connected to the mounting seat 120 through the connecting member 430, when the vehicle is in the first state, the drawbar 400 is detached from the mounting seat 120, and when the vehicle is in the second state, the drawbar 400 is connected to the mounting seat 120. Specifically, referring to fig. 8, the mounting base 120 has a mounting hole 121 thereon, and an end of the drawbar 400 is fittingly insertable into the mounting hole 121. Referring to fig. 5, the traction lever 400 includes a lever body 410 and a socket part 420 bent and extended from one end of the lever body 410, the socket part 420 extending in a left-right direction, the socket part 420 being fittingly insertable into the mounting hole 121.

In this embodiment, the connecting member 430 detachably connects the mounting base 120 and the drawbar 400 along a connection direction extending in a direction perpendicular to the direction in which the drawbar 400 is inserted into the mounting hole 121. Specifically, referring to fig. 8, the connecting member 430 is a locking pin, lock holes are formed on the insertion portions 420 of the mounting base 120 and the traction rod 400, and when the connecting member 430 is inserted into the lock hole of the mounting base 120 and simultaneously inserted into the lock hole of the insertion portion 420, the locking pin locks the mounting base 120 and the traction rod 400, so that the mounting base 120 and the traction rod 400 cannot be separated. In this embodiment, when the locking pin is inserted into the lock hole of the mounting seat 120 and the insertion portion 420, which are mutually communicated, the locking of the mounting seat 120 and the traction rod 400 is achieved. When the locking pin is disengaged from the locking hole of the mounting base 120 and the plugging portion 420, the plugging portion 420 can be detached from the mounting hole 121.

In this embodiment, the push rod frame 500 includes two sets of push rods 510 disposed on the left and right sides, and the frame body is disposed between the two sets of push rods 510 along the left and right direction, and one end of the push rod 510 is rotatably connected to the frame body. In this embodiment, the push rod rack 500 further includes a push rod 520 extending in a left-right direction, as shown in fig. 1, the carrier is in a first state, the push rod 520 is connected between the upper ends of the two sets of push rods 510, and in this state, a user can hold the push rod 520 to drive the carrier to move. Specifically, the push rod 510 is rotatably coupled to the front of the bottom chassis 110, and in a first state, the push rod frame 500 extends in the up-down direction and is unfolded with respect to the bottom chassis 110, and in a second state, the push rod frame 500 is folded over the bottom chassis 110.

In this embodiment, the push rod stand 500 is in the open position, and the push rod 510 has a first use state extending obliquely upward from front to rear, and a second use state extending gradually upward from rear to front. In the first state, the push handle 520 is located at the rear side of the frame body, and the carrier is used as a cart, so that the user can hold the push handle 520 and push forward, thereby driving the carrier to move forward. In the second use state, the push rod 520 is located at the front side of the frame body, and in this state, the vehicle can be used as a trailer, and the user can pull the push rod frame 500 forward to drive the vehicle to move forward.

In this embodiment, as shown in fig. 3, in the second state, the frame body is located between the two sets of second wheels 222 along the left-right direction, and the frame body and the second wheels 222 are disposed at intervals, when the push rod frame 500 is in the folded position, an avoidance space capable of accommodating the push rod 510 is formed between the frame body and the second wheels 222, so as to facilitate folding of the push rod 510 between the second wheels 222 and the frame body. In this embodiment, the second wheel 222 is higher than the chassis 110, and the push rod frame 500 is conveniently folded downward relative to the chassis 110 by providing an avoidance space.

In this embodiment, the carrier further includes a linkage assembly movably disposed between the push rod rest 500 and the frame body, so that the push rod rest 500 is switched between the open position and the folded position. Specifically, the linkage assembly includes two sets of linkage rods 610 disposed on the left and right sides, and the linkage rods 610 are movably connected between the frame body and the push rod 510. In this embodiment, the linkage assembly further includes a slider 620, the slider 620 is slidably disposed on the push rod 510 along the length extending direction of the push rod 510, one end portion of the linkage rod 610 is rotatably connected to the slider 620 and the other end portion is rotatably connected to the frame body, specifically, the other end portion of the linkage rod 610 is rotatably connected to the chassis 110.

When the carrier is in the first state and the push rod 510 is in the first use state, as shown in fig. 1, the link rod 610 extends in the up-down direction, and a triangle structure is formed among the push rod 510, the link rod 610 and the chassis 110 to maintain the state of the push rod rack 500. In the second state, as shown in fig. 3 and 5, the link lever 610 is shifted to extend in the front-rear direction, and the push rod 510 and the link lever 610 are both located in the escape space.

In this embodiment, the linkage rod 610 has a first rod section and a second rod section that are fixedly disposed, and in the first usage state of the push rod 510, the first rod section extends obliquely from bottom to top and backward, and the second rod section extends from the rear portion of the first rod section in an upward bending manner, so that an obtuse included angle is formed between the first rod section and the second rod section. When the carrier is in the second state, the second bar segment can rest against the second wheel seat 221, so that the pusher carriage 500 is maintained in the folded position.

In this embodiment, referring to fig. 2, the third wheel assembly 300 is detachably connected to the frame body, specifically, the third wheel assembly 300 is detachably connected to the chassis 110, and when the vehicle is in the second state, the third wheel assembly 300 is detached from the chassis 110. In this embodiment, the third wheel assembly 300 is a universal wheel, which includes a wheel frame 310 rotatably connected to the bottom frame 110 about a rotation center line extending in a vertical direction, and a third wheel body 330 rotatably connected to the wheel frame 310 about a wheel shaft 320, and the axis line of the wheel shaft 320 extends in a horizontal direction. In this embodiment, the third wheel assembly 300 includes two groups spaced apart in the left-right direction, and the two groups of third wheel assemblies 300 are disposed separately on the left and right sides of the chassis 110.

The frame main body further comprises a frame surrounding assembly arranged on the underframe 110, and the frame surrounding assembly surrounds a frame-shaped bearing space above the underframe 110. In this embodiment, the enclosure assembly includes an upper enclosure 140 above the bottom frame 110 and a supporting frame 150 connected between the upper enclosure 140 and the bottom frame 110. Referring to fig. 1, the upper enclosure frame 140 includes a first enclosure rod 141 extending in a front-rear direction and a second enclosure rod 142 extending in a left-right direction, the first enclosure rod 141 includes two enclosure rods arranged at intervals in the left-right direction, the second enclosure rod 142 includes two enclosure rods arranged at intervals in the front-rear direction, and the two first enclosure rods 141 and the two second enclosure rods 142 are connected end to form a closed frame. The supporting frames 150 include two groups of supporting frames disposed at intervals along the front-rear direction, and the two groups of supporting frames 150 are respectively connected between the two second surrounding rods 142 and the bottom frame 110. In the present embodiment, the support frame 150 can be folded up and down, so that the upper enclosure frame 140 can be folded relative to the bottom frame 110, so as to reduce the space occupied by the carrier when the carrier is not used.

In summary, the carrier of the present embodiment has the first wheel assembly 210 and the second wheel assembly 220 that can be used interchangeably, and in the first state, the first wheel assembly 210 is connected to the frame body, and the third wheel assembly 300 is also connected to the frame body, and in this state, the carrier itself can be kept stable and can be used independently. In the second state, the second wheel assembly 220 is coupled to the frame body, and the third wheel assembly 300 is detached from the frame body, and in this state, the carrier is fixed to the rear of a bicycle or other available vehicle by the drawbar 400 and used as a trailer. In the first state and the second state, the height of the frame main body in the vertical direction is basically the same, and the stability of the carrier when carrying an object is not affected.

The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. A carrier is characterized in that, the carrier includes:

The frame comprises a frame body, wherein the frame body is provided with a bottom frame, and a connecting structure is arranged on the bottom frame;

the first wheel assembly comprises a first wheel seat and a first wheel body which is rotatably arranged on the first wheel seat around a first axial lead, and a first matching structure which can be detachably connected with the connecting structure is arranged on the first wheel seat;

The second wheel assembly comprises a second wheel seat and a second wheel body which is rotationally arranged on the second wheel seat around a second axial line, the diameter of the second wheel body is larger than that of the first wheel body, a second matching structure which can be detachably connected with the connecting structure is arranged on the second wheel seat,

The carrier has a first state in which the first wheel assembly is connected with the frame body, and a second state in which the second wheel assembly is connected with the frame body,

In the first state, the first matching structure is matched and connected with the connecting structure, the underframe and the first axial lead have a first interval in the vertical direction, and in the second state, the second matching structure is matched with the connecting structure, and the underframe and the second axial lead have a second interval in the vertical direction, wherein the first interval is larger than the second interval.

2. The carrier of claim 1, wherein the connection structure comprises a plug extending downward from the chassis, the plug being connectable with the first mating structure or with the second mating structure.

3. The carrier of claim 2, wherein the first mating structure comprises a connector extending from the first wheel base in a protruding manner toward the plug, and a mating structure is disposed between the connector and the plug;

When the connector and the plug are mutually jointed, the length of a joint body formed is larger than the length of any one of the connector and the plug;

The joint structure comprises a joint groove, wherein the joint groove is arranged on one of the connector and the plug connector, and the other joint groove can be inserted in the joint groove in a matched mode, and the depth of the joint groove is smaller than the length of the connector and the length of the plug connector.

4. The carrier of claim 2, wherein the second mating structure is a mating groove provided on the second wheel mount, at least a portion of the mating head being matably insertable in the mating groove;

The second wheel seat is provided with a protruding part which is integrally arranged towards the extending direction of the plug connector, the plug groove is arranged on the protruding part, and the protruding part is arranged towards the extending direction away from the plug connector.

5. The carrier of claim 2, wherein the plug is integrally located above the first axis when the plug is mated with the first mating structure, and wherein the plug is at least partially located below the second axis when the plug is mated with the second mating structure.

6. The carrier of claim 2, wherein the plug is gradually inclined backward from top to bottom, and the first mating structure and the second mating structure are detachably connected with the plug along the extending direction of the length of the plug.

7. The carrier of claim 1, wherein the first wheel base and the first wheel body of the first wheel assembly each have two spaced apart along the extending direction of the first axis, and the second wheel base and the second wheel body of the second wheel assembly each have two spaced apart along the extending direction of the second axis, wherein the first mating structure, the second mating structure, and the connecting structure each have two spaced apart sets, and a distance between the two sets of first mating structures, a distance between the two sets of second mating structures, and a distance between the two sets of connecting structures are the same.

8. The vehicle of claim 7, wherein said first wheel assembly includes a first connecting arm secured between two of said first wheel mounts such that said first wheel assembly is integrally attachable to and detachable from said frame body;

The second wheel assembly comprises a second connecting arm fixedly arranged between the two second wheel seats, so that the second wheel assembly can be integrally connected with the frame main body or detached from the frame main body.

9. The carrier of claim 1, wherein the carrier is substantially the same height in the vertical direction in the first state as in the second state.

10. The carrier according to any one of claims 1 to 9, wherein the connecting structure is provided at a rear portion of the frame body, the carrier further comprises a push rod frame, a traction rod and a third wheel assembly, the push rod frame is movably connected to the frame body, the push rod frame has an open position opened relative to the frame body and a folded position folded relative to the frame body, the traction rod and the third wheel assembly are respectively and foldably connected to the frame body,

The vehicle is in a first state, the third wheel assembly is arranged at the bottom front part of the frame main body, the first wheel assembly is arranged at the bottom rear part of the frame main body, the push rod frame is in an open position, and the traction rod is folded relative to the frame main body or detached from the frame main body;

The vehicle is in a second state, the third wheel assembly is folded relative to the frame main body or detached from the frame main body, the second wheel assembly is arranged at the bottom rear part of the frame main body, the push rod frame is in a folding position, and the traction rod extends forwards from the front part of the frame main body;

And/or, the frame main body further comprises a surrounding frame assembly arranged on the underframe, and the surrounding frame assembly surrounds a bearing space above the underframe to form a frame.