Carrier

Abstract

The utility model discloses a carrier which comprises a frame body with a bottom frame, a first wheel assembly and a second wheel assembly, the first wheel assembly comprises a first wheel seat and a first wheel body rotationally arranged on the first wheel seat, and the first wheel seat is detachably connected with the bottom frame; the second wheel assembly comprises a second wheel seat and a second wheel body rotationally arranged on the second wheel seat, the diameter of the second wheel body is larger than that of the first wheel body, and the second wheel seat is detachably connected with the bottom frame; the carrier has a first state and a second state, in the first state, the first wheel seat is fixedly mounted on the bottom frame, and a first distance is formed between the bottom frame and the first wheel body in the left-right direction; in the second state, the second wheel seat is fixedly installed on the bottom frame, a second distance larger than the first distance is formed between the bottom frame and the second wheel body in the left-right direction, and the carrier is rich in use mode and convenient to convert.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carrier. BACKGROUND

[0002] In the prior art, most carriers, such as trolleys, trailers, etc., have fixed structures and single use modes, and cannot meet the use requirements of users in different scenarios, so the roles that the carriers can play are limited, which affects the use frequency of the carriers, makes the utilization rate of the carriers low, and causes waste of resources; at the same time, in order to meet different use requirements, users need to purchase different types of carriers, which costs a lot and increases the burden of users. SUMMARY

[0003] The utility model aims at providing a new carrier.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of a carrier, which comprises:

[0005] A vehicle frame body has a chassis;

[0006] A first wheel assembly comprises a first wheel seat, a first wheel body rotatably arranged on the first wheel seat about a first axis line, and the first wheel seat is detachably connected with the chassis;

[0007] A second wheel assembly comprises a second wheel seat, a second wheel body rotatably arranged on the second wheel seat about a second axis line, the diameter of the second wheel body is greater than that of the first wheel body, and the second wheel seat is detachably connected with the chassis;

[0008] The carrier has a first state and a second state, in the first state, the first wheel seat is fixedly installed to the chassis, and the chassis has a first distance with the first wheel body in the left-right direction; in the second state, the second wheel seat is fixedly installed to the chassis, and the chassis has a second distance with the second wheel body in the left-right direction, wherein the first distance is less than the second distance.

[0009] In some embodiments, the second wheel seat comprises two, in the second state, two second wheel seats are respectively fixedly installed on different sides of the vehicle frame body in the left-right direction; the carrier further has a handlebar rotatably installed on the vehicle frame body, the handlebar has two groups of push rod assemblies rotatably installed on different sides of the vehicle frame body in the left-right direction; the push rod assemblies are located between the second wheel body and the vehicle frame body in the left-right direction.

[0010] In some embodiments, the second wheel seat has a wheel seat body fixedly mounted on the chassis and an extension extending in the left-right direction, the extension extending from the wheel seat body to the outside of the frame body, the second wheel body being rotatably mounted on the end of the extension away from the wheel seat body; the push handle has an unfolded position relative to the frame body and a folded position relative to the frame body, in the first state, the push handle is in the unfolded position; in the second state, the push handle is in the folded position, and the push rod assembly is supported on the extension.

[0011] In some embodiments, the push rod assembly includes a push rod and a support rod, one end of the push rod being rotatably connected to the frame body, and the support rod being movably arranged between the push rod and the frame body; an avoidance space is formed between the frame body and the second wheel body, when the push handle is in the folded position, the push rod and the support rod are both located in the avoidance space, and the support rod is supported on the extension.

[0012] In some embodiments, one end of the support rod is rotatably connected with a sliding member, the sliding member being slidably arranged on the push rod along the length extension direction of the push rod, and the other end of the support rod being rotatably connected to the chassis; when the push handle is in the unfolded position, the push rod has a first use state extending upwardly from front to back, and a second use state gradually extending upwardly from back to front.

[0013] In some embodiments, the frame body is provided with a connecting structure, the first wheel seat is provided with a first matching structure capable of being detachably connected with the connecting structure, and the second wheel seat is provided with a second matching structure capable of being detachably connected with the connecting structure; in the first state, the first matching structure and the connecting structure are connected with each other in cooperation, so that the frame body and the first axis center line have a third distance in the vertical direction; in the second state, the second matching structure and the connecting structure are connected with each other in cooperation, so that the frame body and the second axis center line have a fourth distance in the vertical direction, and the third distance is greater than the fourth distance.

[0014] In some embodiments, the connecting structure includes a plug-in head protruding downwardly from the lower part of the frame body, the plug-in head being capable of being connected with the first matching structure or the second matching structure, respectively, wherein when the plug-in head cooperates with the first matching structure, the plug-in head is located above the first axis center line as a whole; when the plug-in head cooperates with the second matching structure, at least part of the plug-in head is located below the second axis center line, and the height of the bottom surface of the frame body in the vertical direction is substantially the same in the first state and in the second state.

[0015] In some embodiments, the first mating structure includes a connecting body extending protruding from the first wheel seat in the direction of the plug, and a mating structure is provided between the connecting body and the plug. When the connecting body and the plug are mated together, the length of the mating body is greater than the length of either the connecting body or the plug. The mating structure includes a mating groove, which is provided on either the connecting body or the plug, and the other can be mated and inserted into the mating groove. The depth of the mating groove is less than the length of the connecting body and the length of the plug.

[0016] In some embodiments, the second mating structure is a plug groove provided on the second wheel seat, and at least a portion of the plug can be mated and inserted into the plug groove.

[0017] In some embodiments, the vehicle includes a tow bar that is detachably or retractably connected to the frame body; in a first state, the tow bar is detached from the frame body or retracted relative to the frame body; in a second state, the tow bar extends forward from the front of the frame body.

[0018] In some embodiments, a mounting base is fixedly provided at the front of the frame body, and one end of the tow bar can be detachably connected to the mounting base via a connector. The mounting base has a mounting hole, and one end of the tow bar can be inserted into the mounting hole. The connector detachably connects the mounting base and the tow bar along a connection direction that extends perpendicular to the direction in which the tow bar is inserted into the mounting hole.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The vehicle of this utility model has a first state and a second state that can be converted. In the first state, the first wheel assembly is fixedly installed on the base frame. In the second state, the second wheel assembly is fixedly installed on the base frame. Users can replace the wheel assembly according to their needs, which enriches the usage mode of the vehicle and makes the vehicle suitable for different usage scenarios, thereby improving the utilization rate of the vehicle. Attached Figure Description

[0020] Appendix Figure 1 This is a three-dimensional structural diagram of the vehicle in a first state according to a specific embodiment of the present invention;

[0021] Appendix Figure 2 For the appendix Figure 1 Partially exploded diagram;

[0022] AppendixFigure 3 For the appendix Figure 2 Enlarged view of point A in the middle;

[0023] Appendix Figure 4 This is a three-dimensional structural diagram of the vehicle in the second state according to this embodiment;

[0024] Appendix Figure 5 For the appendix Figure 4 Partially exploded diagram;

[0025] Appendix Figure 6 For the appendix Figure 5 Enlarged view of point B in the middle;

[0026] Appendix Figure 7 For the appendix Figure 4 A three-dimensional schematic diagram of the middle section structure;

[0027] Appendix Figure 8 This is a partially exploded view of the mounting base in this embodiment;

[0028] Wherein: 11, mounting base; 111, mounting hole; 12, connector; 13, base frame; 14, upper frame; 141, first retaining rod; 142, second retaining rod; 15, support frame;

[0029] 2. Front wheel assembly; 21. Front wheel frame; 22. Front axle; 23. Front wheel body;

[0030] 3. Rear wheel assembly; 30. Crossbar; 31. First wheel assembly; 311. First wheel seat; 312. First wheel body; 313. Connector; 314. Engaging groove; 32. Second wheel assembly; 321. Second wheel seat; 3211. Wheel seat body; 3212. Extension; 322. Second wheel body; 323. Insertion groove;

[0031] 4. Push handle; 41. Push rod; 42. Push handle lever;

[0032] 5. Linkage components; 51. Support rod; 52. Sliding component;

[0033] 6. Towing rod; 61. Rod body; 62. Connecting part; 63. Connecting piece. Detailed Implementation

[0034] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of this utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0035] See Figure 1 , Figure 4 The vehicle shown includes a frame body, a first wheel assembly 31, and a second wheel assembly 32. The frame body includes a chassis 13 extending in a front-rear direction. The first wheel assembly 31 includes a first wheel seat 311 and a first wheel body 312 rotatably mounted on the first wheel seat 311 about a first axis X1. The first wheel seat 311 is detachably connected to the chassis 13. The second wheel assembly 32 includes a second wheel seat 321 and a second wheel body 322 rotatably mounted on the second wheel seat 321 about a second axis X2. The diameter of the second wheel body 322 is larger than the diameter of the first wheel body 312. The second wheel seat 321 is detachably connected to the chassis 13.

[0036] The vehicle has a first state and a second state. In the first state, the first wheel mount 311 is fixedly mounted to the base frame 13, and the base frame 13 and the first wheel body 312 have a first distance in the left-right direction. In the second state, the second wheel mount 321 is fixedly mounted to the base frame 13, and the base frame 13 and the second wheel body 322 have a second distance in the left-right direction, wherein the first distance is smaller than the second distance. Users can replace the first wheel assembly 31 and the second wheel assembly 32 according to different usage environments and needs.

[0037] Specifically, in this embodiment, the vehicle includes a front wheel assembly 2, a rear wheel assembly 3, and a push handle 4. The front wheel assembly 2 is located at the front of the main frame, the rear wheel assembly 3 is located at the rear of the main frame, and one end of the push handle 4 is rotatably connected to the main frame. In this embodiment, the front wheel assembly 2 and the rear wheel assembly 3 are connected to the base frame 13, and the push rod 41 is rotatably connected to the front of the base frame 13. In this embodiment, the push handle 4 has an open position relative to the main frame and a folded position relative to the main frame. In the first state, the push handle 4 is in the open position, extending vertically and unfolded relative to the base frame 13; in the second state, the push handle 4 is in the folded position, folded above the base frame 13.

[0038] In this embodiment, the rear wheel assembly 3 includes two rear wheel seats spaced apart in the left-right direction, and two rear wheel bodies rotatably mounted on the two rear wheel seats. The rear wheel seats are connected to the main frame body. See also Figure 3 As shown, the frame body is positioned between the two sets of rear wheels along the left-right direction, and the frame body and the rear wheels are spaced apart. When the push handle 4 is in the folded position, a clearance space is formed between the frame body and the rear wheels to accommodate the push rod 41. In the second state, the push rod 41 can be accommodated in the clearance space without disassembling the push rod 41, simplifying the switching operation.

[0039] In this embodiment, the rear wheel assembly is detachably connected to the vehicle frame body. The rear wheel assembly 3 can be replaced to meet the needs of different usage scenarios, thereby better fulfilling the vehicle's function. Specifically, both the first wheel assembly 31 and the second wheel assembly 32 are replaceable rear wheel assemblies 3. A connecting structure is provided on the vehicle frame body, and both the first wheel assembly 31 and the second wheel assembly 32 can be detachably connected to the connecting structure.

[0040] In this embodiment, when the vehicle is in the first state and the first wheel assembly 31 is connected to the connecting structure, the vehicle can be switched more flexibly due to the smaller size of the first wheel assembly 31. The larger second wheel assembly 32 has better grip and can better maintain the stability of the vehicle at higher speeds. It is also more durable and has a longer service life. In this embodiment, when the vehicle is in the second state, the second wheel assembly 32 is connected to the connecting structure.

[0041] In this embodiment, see Figure 4 As shown, the second wheel seat 321 includes two units. In the second state, the two second wheel seats 321 are fixedly mounted on opposite sides of the frame body in the left-right direction, forming the aforementioned clearance space between the frame body and the second wheel 322. The push handle 4 has two sets of push rod assemblies rotatably mounted on opposite sides of the frame body in the left-right direction. When the vehicle is in the second state, located on the left and right sides of the frame body, the push rod assemblies are positioned between the second wheel 322 and the frame body in the left-right direction. Thus, in the second state, the push rod assemblies can be folded into the clearance space between the second wheel 322 and the frame body.

[0042] In this embodiment, the second wheel seat 321 has a wheel seat body 3211 fixedly mounted on the base frame 13 and an extension portion 3212 extending in the left-right direction. See [reference needed] Figure 6 As shown, the extension 3212 extends from the wheel seat body 3211 to the outside of the frame body, and the second wheel 322 is rotatably mounted on the end of the extension 3212 away from the wheel seat body 3211. When the vehicle is in the second state, the push rod assembly is supported on the extension 3212 to maintain stability.

[0043] In this embodiment, the push rod assembly includes a push rod 41 and a support rod 51. One end of the push rod 41 is rotatably connected to the frame body, and the support rod 51 is movably disposed between the push rod 41 and the frame body. In this embodiment, in the second state, when the push handle is in the folded position, both the push rod 41 and the support rod 51 are located within the clearance space, and the support rod 51 is supported on the extension 3212, so that the push handle 4 is maintained in the folded position.

[0044] In this embodiment, one end of the support rod 51 is rotatably connected to a sliding member 52. The sliding member 52 is slidably disposed on the push rod 41 along the length extension direction of the push rod 41. One end of the support rod 51 is rotatably connected to the sliding member 52 and the other end is rotatably connected to the frame body. In this embodiment, the other end of the support rod 51 is rotatably connected to the base frame 13.

[0045] In this embodiment, the support rod 51 has a fixedly installed first rod segment and a second rod segment. When the push rod 41 is in the first use state, the first rod segment extends backward at an upward angle, and the second rod segment bends upward from the rear of the first rod segment, so that the first rod segment and the second rod segment form an obtuse angle. When the vehicle is in the second state, the second rod segment can abut against the extension 3212.

[0046] In this embodiment, the push handle 4 also includes a push handle rod 42 extending in the left-right direction, see [reference]. Figure 1 As shown, in the first state, the push handle 42 is connected between the upper ends of the two sets of push rods 41. In this state, the user can hold the push handle 42 to drive the vehicle forward. In this embodiment, the push handle 4 is in the open position, having a first use state extending upward from front to back, and a second use state extending upward from back to front. In the first use state, the push handle 42 is located at the rear of the frame body, and the vehicle is used as a trolley. The user can hold the push handle 42 and push it forward to drive the vehicle forward. In the second use state, the push handle 42 is located at the front of the frame body. In this state, the vehicle can be used as a trailer, and the user can pull the push handle 4 forward to drive the vehicle forward.

[0047] In this embodiment, the rear wheel assembly 3 further includes a crossbar 30 fixedly disposed between the two rear wheel seats, allowing the rear wheel assembly 3 to be integrally connected to or detached from the frame body. In this embodiment, the first wheel seat 311 is provided with a first mating structure that can be detachably connected to the connecting structure, and the second wheel seat 321 is provided with a second mating structure that can be detachably connected to the connecting structure. In the first state, the first mating structure and the connecting structure are mated together, resulting in a third vertical distance between the frame body and the first axle centerline X1. In the second state, the second mating structure and the connecting structure are mated together, resulting in a fourth vertical distance between the frame body and the second axle centerline X2. In this embodiment, the third distance is greater than the fourth distance, ensuring that the bottom surface of the frame body is substantially the same in the vertical direction in both the first and second states.

[0048] In this embodiment, see Figure 7As shown, the connecting structure includes a connector 12 extending downward from the lower part of the frame body. Specifically, the connector 12 extends downward from the underframe 13 and can be connected to either the first mating structure or the second mating structure. When the connector 12 mates with the first mating structure, the connector 12 is entirely located above the first axle centerline X1; when the connector 12 mates with the second mating structure, at least a portion of the connector 12 is located below the second axle centerline X2. This reduces the distance between the second axle centerline X2 and the underframe 13, i.e., reduces the second distance, so that the underframe 13 does not rise excessively when the second wheel assembly 32 is connected to the connecting structure.

[0049] In this embodiment, the first mating structure includes a connecting body 313 extending upward from the first wheel seat. A mating structure is provided between the connecting body 313 and the plug 12, such that the length of the mating body formed after the connecting body 313 and the plug 12 are engaged is greater than the length of either the connecting body 313 or the plug 12. Specifically, the mating structure includes a mating groove 314, which is located on one of the connecting body 313 and the plug 12, and the other can be mated and inserted into the mating groove 314. The depth of the mating groove 314 is less than the length of the connecting body 313 and the length of the plug 12. See also... Figure 6 As shown, in this embodiment, the second mating structure is a insertion groove 323 provided on the second wheel seat 321, and at least a portion of the insertion connector 12 can be mated and inserted into the insertion groove 323. See also... Figure 7 As shown, the connector 12 extends gradually backward from top to bottom, and the connector 12 can move relative to the connector 313 or the plug slot 323 along its own length direction to engage with it.

[0050] See Figure 3 As shown, in this embodiment, the engagement groove 314 is disposed on the connecting body 313, which extends upward and forward from the first wheel seat 311. The engagement groove 314 also gradually extends forward from bottom to top, and the engagement groove 314 is located entirely above the first axis X1. In this embodiment, the insertion groove 323 extends downward and backward from above the second axis X2, and extends to the rear side of the second axis X2 and below the second axis X2. Thus, when the connector 12 is inserted into the insertion groove 323, at least a portion of the connector 12 is located below the second axis X2.

[0051] In some embodiments, the vehicle further includes a linkage assembly 5, which is movably disposed between the push handle 4 and the frame body, so that the push handle 4 can switch between an open position and a folded position. In this embodiment, the two support rods 51 on the left and right sides and the sliding member 52 rotatably connected to the support rods 51 constitute the linkage assembly 5. When the vehicle is in the first state and the push handle 41 is in the first use state, see [reference needed]. Figure 1 As shown, the support rod 51 extends vertically, and the push rod 41, support rod 51, and base frame 13 form a triangular structure to maintain the state of the push handle 4. In the second state, see... Figure 3 , Figure 5 As shown, the support rod 51 is converted to extend in the front-to-back direction, and both the push rod 41 and the support rod 51 are located within the clearance space.

[0052] In this embodiment, see Figure 2 As shown, the front wheel assembly 2 is detachably or foldably connected to the main frame. Specifically, the front wheel assembly 2 is detachably connected to the base frame 13, and when the vehicle is in the second state, the front wheel assembly 2 is detached from the base frame 13. In this embodiment, the front wheel assembly 2 is a swivel wheel, which includes a front wheel frame 21 rotatably connected to the base frame 13 about a rotation center line extending in the vertical direction, and a front wheel body 23 rotatably connected to the front wheel frame 21 about a front wheel axle 22 extending in the horizontal direction. In this embodiment, the front wheel assembly 2 includes two sets of front wheel assemblies spaced apart in the left-right direction, with the two sets of front wheel assemblies 2 respectively located on the left and right sides of the base frame 13.

[0053] In this embodiment, the vehicle also includes a tow bar 6, which is detachably or foldably connected to the vehicle frame body. In the first state, the tow bar 6 is detached from the vehicle frame body or folded relative to it, and the vehicle frame body is supported on the ground by the front wheel assembly 2 and the rear wheel assembly 3. In the second state, the front wheel assembly 2 is detached from the vehicle frame body or folded relative to it, the vehicle is supported on the ground by the rear wheel assembly 3, and the tow bar 6 extends forward from the front of the vehicle frame body.

[0054] In the first state, the vehicle itself can maintain stability through the front wheel assembly 2 and the rear wheel assembly 3, and can be used as a standalone trolley or trailer. The user drives the vehicle by pushing the handle 4. In the second state, the vehicle can be fixed to the rear of a bicycle or other movable vehicle via the tow bar 6, and the bicycle or other movable vehicle can then move the vehicle, allowing it to be used as a trailer. In this state, because the front wheel assembly 2 is detached or folded, the vehicle's turning flexibility is improved, and it is less prone to tipping over.

[0055] In this embodiment, a mounting base 11 is fixedly provided at the front of the vehicle frame body. One end of the tow bar 6 can be detachably connected to the mounting base 11 via a connector 63. When the vehicle is in the first state, the tow bar 6 is detached from the mounting base 11; when the vehicle is in the second state, the tow bar 6 is connected to the mounting base 11. Specifically, see... Figure 8 As shown, the mounting base 11 has a mounting hole 111, and one end of the traction rod 6 can be inserted into the mounting hole 111. See also Figure 5 As shown, the traction rod 6 includes a rod body 61 and a plug portion 62 that extends from one end of the rod body 61. The plug portion 62 extends in the left-right direction and can be inserted into the mounting hole 111.

[0056] In this embodiment, the connector 63 detachably connects the mounting base 11 and the traction rod 6 along the connection direction, which extends perpendicular to the direction in which the traction rod 6 is inserted into the mounting hole 111. Specifically, see... Figure 8 As shown, the connector 63 is a locking pin. Both the mounting base 11 and the insertion portion 62 of the traction rod 6 have locking holes. When the connector 63 is inserted into the locking hole of the mounting base 11 and simultaneously into the locking hole of the insertion portion 62, the locking pin locks the mounting base 11 and the traction rod 6, preventing them from being separated. In this embodiment, when the locking pin is inserted vertically into the locking holes of the interconnected mounting base 11 and insertion portion 62, it locks the mounting base 11 and the traction rod 6. After the locking pin disengages from the locking holes of the mounting base 11 and insertion portion 62, the insertion portion 62 can be detached from the mounting hole 111.

[0057] In this embodiment, the main body of the vehicle frame also includes a frame assembly disposed on the underframe 13, which encloses a frame-shaped load-bearing space above the underframe 13. In this embodiment, the frame assembly includes an upper frame 14 located above the underframe 13 and a support frame 15 connecting the upper frame 14 and the underframe 13. See also... Figure 1 As shown, the upper frame 14 includes a first frame rod 141 extending in the front-to-back direction and a second frame rod 142 extending in the left-to-right direction. The first frame rod 141 includes two rods spaced apart in the left-to-right direction, and the second frame rod 142 includes two rods spaced apart in the front-to-back direction. The two first frame rods 141 and the two second frame rods 142 are connected end-to-end to form a closed frame. The support frame 15 includes two sets spaced apart in the front-to-back direction. The two sets of support frames 15 are respectively connected between the two second frame rods 142 and the base frame 13. In this embodiment, the support frame 15 can be folded up and down, so that the upper frame 14 can be folded relative to the base frame 13, thereby reducing the space occupied by the vehicle when it is not in use.

[0058] In summary, in the first state, the vehicle of this embodiment functions as a trolley or trailer that can maintain stability and be used independently. In the second state, it functions as a trailer fixed to the rear of a bicycle or other movable vehicle. The usage mode of the vehicle is no longer singular, and the applicable scenarios are expanded. The rear wheel assembly 3 can be replaced according to the needs of different scenarios. When the first wheel assembly 31 and the second wheel assembly 32 are connected to the base frame 13, the height of the frame body is basically the same, ensuring the stability of the load-bearing structure. At the same time, in the second state, the push rod assembly can be accommodated in the clearance space between the second wheel body 322 and the frame body, providing convenience for conversion. Furthermore, the support rod 51 can be supported on the extension 3212 of the second wheel seat 321, so that the push handle 4 can be stably maintained in the folded position.

[0059] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A vehicle, characterized in that, The vehicle includes: The vehicle frame body has a base frame; The first wheel assembly includes a first wheel seat and a first wheel body rotatably mounted on the first wheel seat about a first axis, wherein the first wheel seat is detachably connected to the base frame; The second wheel assembly includes a second wheel seat and a second wheel body rotatably mounted on the second wheel seat about a second axis. The diameter of the second wheel body is larger than the diameter of the first wheel body. The second wheel seat is detachably connected to the base frame. The vehicle has a first state and a second state. In the first state, the first wheel seat is fixedly installed on the base frame, and the base frame and the first wheel body have a first distance in the left-right direction. In the second state, the second wheel seat is fixedly installed on the base frame, and the base frame and the second wheel body have a second distance in the left-right direction, wherein the first distance is smaller than the second distance.

2. The vehicle according to claim 1, characterized in that: The second wheel seat includes two parts. In the second state, the two second wheel seats are respectively fixedly installed on opposite sides of the frame body in the left and right directions. The vehicle also has a push handle rotatably mounted on the frame body, the push handle having two sets of push rod assemblies rotatably mounted on opposite sides of the frame body in the left and right directions; located on the left and right sides of the frame body, the push rod assemblies are located between the second wheel and the frame body in the left and right direction.

3. The vehicle according to claim 2, characterized in that: The second wheel seat has a wheel seat body fixedly mounted on the base frame and an extension extending in the left-right direction. The extension extends from the wheel seat body to the outside of the frame body, and the second wheel body is rotatably mounted on the end of the extension away from the wheel seat body. The push handle has an open position that is unfolded relative to the main body of the frame, and a folded position that is retracted relative to the main body of the frame. In the first state, the push handle is in the open position. In the second state, the push handle is in the folded position, and the push rod assembly is supported on the extension.

4. The vehicle according to claim 3, characterized in that: The push rod assembly includes a push rod and a support rod. One end of the push rod is rotatably connected to the main body of the vehicle frame, and the support rod is movably disposed between the push rod and the main body of the vehicle frame. A clearance space is formed between the main body of the frame and the second wheel. When the push handle is in the folded position, both the push rod and the support rod are located within the clearance space, and the support rod is supported on the extension.

5. The vehicle according to claim 4, characterized in that: One end of the support rod is rotatably connected to a sliding member, which is slidably mounted on the push rod along the length extension direction of the push rod. The other end of the support rod is rotatably connected to the base frame. When the push handle is in the open position, the push rod has a first use state of extending upward from front to back, and a second use state of extending upward from back to front.

6. The vehicle according to claim 1, characterized in that: The frame body is provided with a connecting structure, the first wheel seat is provided with a first mating structure that can be detachably connected to the connecting structure, and the second wheel seat is provided with a second mating structure that can be detachably connected to the connecting structure. In the first state, the first mating structure and the connecting structure are connected to each other, so that the frame body and the first axis line have a third distance in the vertical direction; in the second state, the second mating structure and the connecting structure are connected to each other, so that the frame body and the second axis line have a fourth distance in the vertical direction, and the third distance is greater than the fourth distance.

7. The vehicle according to claim 6, characterized in that: The connection structure includes a connector extending downward from the lower part of the vehicle frame body. The connector can be connected to either the first mating structure or the second mating structure. When the connector is mated with the first mating structure, the connector is entirely located above the first axis; when the connector is mated with the second mating structure, at least a portion of the connector is located below the second axis. In both the first and second states, the bottom surface of the vehicle frame body is at approximately the same height in the vertical direction.

8. The vehicle according to claim 7, characterized in that: The first mating structure includes a connecting body protruding from the first wheel seat in the direction of the plug, and a mating structure is provided between the connecting body and the plug. When the connecting body and the plug are mated, the length of the mating body is greater than the length of either the connecting body or the plug. The joining structure includes a joining groove, which is disposed on one of the connector and the plug, and the other can be inserted into the joining groove. The depth of the joining groove is less than the length of the connector and the length of the plug. And / or, the second mating structure is a plug groove provided on the second wheel seat, and at least a portion of the plug can be mated into the plug groove.

9. The vehicle according to claim 1, characterized in that: The vehicle includes a tow bar, which is detachably or retractably connected to the vehicle frame body; When the vehicle is in the first state, the tow bar is detached from the vehicle frame body or folded relative to the vehicle frame body; When the vehicle is in the second state, the tow bar extends forward from the front of the main body of the vehicle frame.

10. The vehicle according to claim 9, characterized in that: The front of the main body of the vehicle frame is also fixedly provided with a mounting base. One end of the tow bar can be detachably connected to the mounting base via a connector. The mounting base has a mounting hole, and one end of the tow bar can be inserted into the mounting hole. The connector detachably connects the mounting base and the tow bar along the connection direction, which extends in a direction perpendicular to the insertion of the tow bar into the mounting hole.

Images