A foldable wheeled vehicle

Abstract

This application provides a foldable wheeled vehicle, which includes a foldable frame, a first wheel, and a second wheel. The foldable frame has a first assembly end and a second assembly end, and includes a foldable chassis and a foldable peripheral support based on a crank-slider structure. The chassis is connected to the first and second assembly ends. The peripheral support is connected to the chassis to form an accommodating space. The peripheral support and chassis are linked during folding and unfolding. The first wheel is connected to the first assembly end. The second wheel is connected to the second assembly end. The wheeled vehicle provided in this specification overcomes the problem of inconvenient folding of campervans.

Description

Technical Field

[0001] This manual relates to the field of manual camping vehicle technology, and more particularly to a foldable wheeled vehicle. Background Technology

[0002] Many people choose to spend their leisure time outdoors. For example, people may choose to hike or camp to connect with nature and relax. When moving from indoors to outdoors, manual camping vehicles can be used to transport daily necessities, thus improving the comfort of outdoor life. However, existing manual camping vehicles are often not easy to fold quickly.

[0003] Therefore, there is a need for a new type of foldable wheeled vehicle. This wheeled vehicle should be easy to fold quickly.

[0004] The information in the background section is merely information known only to the inventor and does not imply that such information had entered the public domain before the date of this application, nor does it imply that it can be considered prior art in this disclosure. Utility Model Content

[0005] This specification provides a foldable wheeled vehicle that solves the problems existing in related technologies.

[0006] This application provides a foldable wheeled vehicle, which includes a foldable frame, a first wheel, and a second wheel. The foldable frame has a first assembly end and a second assembly end, and includes a foldable chassis and a foldable peripheral support based on a crank-slider structure. The chassis is connected to the first and second assembly ends. The peripheral support is connected to the chassis to form an accommodating space. The peripheral support and chassis are linked during folding and unfolding. The first wheel is connected to the first assembly end. The second wheel is connected to the second assembly end.

[0007] In some embodiments, the peripheral support includes a first side frame based on a crank-slider structure, the first side frame including a first folding mechanism. The first folding mechanism includes a first crank-slider assembly. The first crank-slider assembly includes a first column, a first support rod, a first slider, and a first guardrail. The first column has a first lower end and a first upper end. The first lower end is connected to a first assembly end. The first support rod has a first fixed end and a first movable end, the first fixed end being hinged to the first upper end. The first slider is slidably connected to the first column. The first guardrail has a first sliding end, a first connection point, and a first hinged end. The first sliding end is hinged to the first slider. The first connection point is hinged to the first movable end. In some embodiments, the first slider is sleeved on the first column for slidable connection with the first column.

[0008] In some embodiments, the first column includes a groove. The groove extends along the axial direction of the first column. A first slider is located within the groove and is slidably connected to the groove.

[0009] In some embodiments, the first side frame further includes a second folding mechanism hinged to the first hinge end.

[0010] In some embodiments, the second folding mechanism includes a second crank-slider assembly. The second crank-slider assembly includes a second column, a second support rod, a second slider, and a second guardrail. The second column has a second lower end and a second upper end. The second lower end is connected to a second assembly end. The second support rod has a second fixed end and a second movable end, the second fixed end and the second upper end forming a hinge connection. The second slider is slidably connected to the second column. The second guardrail has a second sliding end, a second connecting point, and a second hinged end. The second sliding end is hinged to the second slider. The second connecting point is hinged to the second movable end. The second hinged end is hinged to a first hinged end.

[0011] In some embodiments, the first crank-slider assembly is an isosceles crank-slider mechanism. The second crank-slider assembly is an isosceles crank-slider mechanism. Both the first and second crank-slider assemblies are located above the chassis.

[0012] In some embodiments, when the foldable frame is in the unfolded state, the first hinge end is higher than the first sliding end. The second hinge end is higher than the second sliding end.

[0013] In some embodiments, the chassis includes a first chassis and a second chassis. The first chassis has a first end and a second end, the first end forming a first hinge connection with a first assembly end. The second chassis has a third end and a fourth end, the fourth end forming a second hinge connection with the second assembly end, and the third end forming a third hinge connection with the second end. The first chassis and the second chassis are arranged along a first direction.

[0014] In some embodiments, the first chassis includes a first link, and the second chassis includes a second link. The first link forms a first hinge connection with a first assembly end at a first end. The second link forms a second hinge connection with a second assembly end at a fourth end. The first link and the second link form a third hinge connection at a second end and a third end, respectively.

[0015] In some embodiments, the first link and the second link are rotatably connected by a first pivot. The first pivot extends along a second direction, which is perpendicular to the first direction.

[0016] In some embodiments, the second end of the first chassis includes a stopper. In the unfolded / deployed state, the first and second chassis are coplanar, and the stopper abuts against the second chassis, preventing further rotation of the first and second chassis along the third hinge connection to prevent the chassis from concave towards the ground. Alternatively, the third end of the second chassis includes a stopper. In the unfolded / deployed state, the first and second chassis are coplanar, and the stopper abuts against the first chassis, preventing further rotation of the first and second chassis along the third hinge connection to prevent the chassis from concave towards the ground.

[0017] In some embodiments, the wheeled vehicle further includes a pulling part located near the third hinge connection. When the user pulls the pulling part, the second end of the first chassis and the third end of the second chassis move upward, causing the chassis to fold and the crank-slider structure to fold.

[0018] In some embodiments, the peripheral support further includes a second side frame connected to the first side frame along a second direction and configured to fix the peripheral support in the second direction. The second direction is perpendicular to the first direction.

[0019] In some embodiments, the foldable carrier includes a handle rod, one end of which is provided with a pull ring, and the other end of which is rotatably connected to a second assembly end, or the other end of which is rotatably connected to a first assembly end.

[0020] In some embodiments, the foldable carrier includes a push handle that is rotatably connected to a first upper end.

[0021] In summary, the foldable wheeled vehicle provided in this manual includes a foldable chassis and a foldable peripheral support based on a crank-slider structure. The peripheral support and chassis are linked during folding and unfolding, enabling synchronous folding of the peripheral support and chassis. Therefore, the foldable wheeled vehicle provided in this manual overcomes the problem of inconvenient folding of camping vehicles and improves folding efficiency.

[0022] Other features of the foldable wheeled vehicle provided in this specification will be partially listed in the following description. The figures and examples presented below will be readily apparent to those skilled in the art. The inventive aspects of the foldable wheeled vehicle provided in this specification can be fully understood through practice or use of the methods, apparatus, and combinations provided in the detailed examples below. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of a wheeled vehicle according to some embodiments of this application is shown;

[0025] Figure 2 This illustration shows a schematic diagram of the switching process between a folded state and an unfolded state of a wheeled vehicle according to some embodiments of this application;

[0026] Figure 3 A schematic diagram of a partial structure of a wheeled vehicle provided according to some embodiments of this application is shown;

[0027] Figure 4 A schematic diagram of the mating structure of a first column and a first slider of a wheeled vehicle provided according to some embodiments of this application is shown;

[0028] Figure 5 A partial cross-sectional structural schematic diagram of the ninth axle of a wheeled vehicle provided according to some embodiments of this application is shown;

[0029] Figure 6 A schematic diagram of the chassis of a wheeled vehicle provided according to some embodiments of this application is shown;

[0030] Figure 7 An exploded view of the first seat of a wheeled vehicle provided according to some embodiments of this application is shown; and

[0031] Figure 8 A cross-sectional structural schematic diagram of the first seat of a wheeled vehicle provided according to some embodiments of this application is shown.

[0032] The reference numerals in the detailed embodiments are as follows:

[0033] D1 First direction; D2 Second direction; D21 Width direction of the peripheral support; O1 First pivot; O2 Second pivot; O3 Third pivot; O4 Fourth pivot; O5 Fifth pivot; O6 Sixth pivot; O7 Seventh pivot; O8 Eighth pivot; O9 Ninth pivot; O10 Tenth pivot; O11 Eleventh pivot; L1 First distance; L2 Spacing between the first seat and the first end; A1 Angle between the first guardrail and the first post; A2 Angle between the second guardrail and the second post; A3 Angle between the first guardrail and the second guardrail; A4 Angle between the upper edge of the first seat and the vertical direction;

[0034] 001 Wheeled vehicle; 010 Foldable frame; 011 First assembly end; 012 Second assembly end; 021 First wheel; 022 Second wheel; 023 Third wheel; 024 Fourth wheel; 031 Lifting component; 050 Hand lever; 051 Pull ring; 060 Push handle;

[0035] 100 Chassis; 101 First end; 102 Second end; 103 Third end; 104 Fourth end; 105 First hinge connection; 106 Second hinge connection; 107 Third hinge connection; 108 Stopper;

[0036] 110 First chassis; 111 First link; 112 Third link; 113 First reinforcing bar; 120 Second chassis; 121 Second link;

[0037] 200 Side support; 201 Crank-slider structure; 202 Accommodation space; 210 First side frame;

[0038] 211 First folding mechanism; 212 First crank-slider assembly; 213 First column; 2131 First lower end; 2132 First upper end; 2133 Slide groove; 2134 Limiting sleeve; 214 First support rod; 2141 First fixed end; 2142 First moving end; 215 First slider; 216 First guardrail; 2161 First sliding end; 2162 First connection point; 2163 First hinge end; 2164 First rod body; 2165 First sleeve body; 2166 First part; 2167 Second part; 2168 First housing; 2169 First limiting part;

[0039] 221 Second folding mechanism; 222 Second crank-slider assembly; 223 Second column; 2231 Second lower end; 2232 Second upper end; 224 Second support rod; 2241 Second fixed end; 2242 Second moving end; 225 Second slider; 226 Second guardrail; 2261 Second sliding end; 2262 Second connection point; 2263 Second hinge end; 2264 Second rod body; 2265 Second sleeve body; 2266 Third part; 2267 Fourth part; 2268 Second housing; 2269 Second limiting part;

[0040] 230 Third side frame; 233 Third upright; 243 Fourth upright; 250 Second side frame; 251 First base bar; 252 Third guardrail; 260 Fourth side frame; 261 Second base bar; 262 Fourth guardrail;

[0041] 310 First seat; 311 First seat rod; 312 Second seat rod; 313 Third seat rod; 410 First seat support; 411 First support rod; 412 Second support rod; 413 Positioning rod; 320 Second seat; 420 Second seat support; 500 Positioning structure; 510 First connector; 511 First positioning part; 520 Second connector; 521 Second positioning part; 530 Third connector; 540 Fourth connector; 541 Fourth positioning part. Detailed Implementation

[0042] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0043] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not restrictive. For example, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” used herein may also include the plural forms. When used in this specification, the terms “comprising,” “including,” and / or “containing” mean that the associated feature, integer, step, operation, element, and / or component is present, but do not preclude the presence of one or more other features, integers, steps, operations, elements, components, and / or groups, or that other features, integers, steps, operations, elements, components, and / or groups may be added to the system / method.

[0044] Considering the following description, these and other features of this specification, as well as the operation and function of the related components of the structure, and the economy of assembly and manufacture of the parts, can be significantly improved. All of these form part of this specification with reference to the accompanying drawings. However, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not drawn to scale.

[0045] The flowcharts used in this specification illustrate operations implemented according to some embodiments of this specification. It should be clearly understood that the operations in the flowcharts may not be implemented in a sequential order. Instead, the operations may be implemented in reverse order or simultaneously. Furthermore, one or more additional operations may be added to the flowcharts. One or more operations may be removed from the flowcharts.

[0046] In this specification, "X includes at least one of A, B, or C" means that X includes at least A, or X includes at least B, or X includes at least C. That is, X may include only one of A, B, and C, or any combination of A, B, and C, as well as other possible content / elements. The arbitrary combination of A, B, and C can be A, B, C, AB, AC, BC, or ABC.

[0047] In this specification, unless explicitly stated otherwise, the relationships between structures can be direct or indirect, complete or partial. For example, when describing "A is connected to B," unless explicitly stated that A and B are directly connected, it should be understood that A can be directly connected to B or indirectly connected to B. Similarly, when describing "A is above B," unless explicitly stated that A is directly above B (AB is adjacent and A is above B), it should be understood that A can be directly above B or indirectly above B (AB is separated by other elements, and A is above B). Furthermore, when describing "A is inside B," unless explicitly stated that A is entirely inside B, it should be understood that A can be entirely inside B or partially inside B. And so on.

[0048] When people move from indoors to outdoors, manual camping vehicles can be used to transport daily necessities, thus improving the comfort of outdoor life. However, existing manual camping vehicles are often not convenient for quick folding. Therefore, there is a need for a new foldable wheeled vehicle that facilitates rapid folding.

[0049] The wheeled vehicles described in this manual can be handcarts, such as campervans. They are small in size and lightweight, making them ideal for short outdoor trips.

[0050] This manual describes a foldable wheeled vehicle comprising a foldable chassis and a foldable peripheral support based on a crank-slider structure. The peripheral support and chassis are linked during folding and unfolding, allowing for synchronous folding of the two components. Therefore, this foldable wheeled vehicle overcomes the inconvenience of folding camping vehicles and improves folding efficiency.

[0051] To facilitate the description of the wheeled vehicle's structure, unless otherwise specified, this specification describes the structure of the wheeled vehicle in the posture of its wheels standing on the ground. The ground refers to the surface supporting the wheeled vehicle, located below it. Furthermore, in this specification, front, back, left, right, up, and down are defined with the direction the user is facing when pushing the wheeled vehicle 001 as the reference point.

[0052] like Figure 1As shown, a wheeled vehicle can have a first direction, a second direction, and a height direction. The height direction refers to the height of the wheeled vehicle when it is standing on the ground with its wheels. The first and second directions are parallel to the ground and perpendicular to the height direction. For example, in... Figure 1 In the wheeled vehicle shown, the first direction is the length direction of the wheeled vehicle, and the second direction is the width direction of the wheeled vehicle. In other embodiments, the first direction may also be the width direction of the wheeled vehicle, and the second direction may be the length direction of the wheeled vehicle.

[0053] The following is a detailed description of the structure of the foldable wheeled vehicle 001.

[0054] Figure 1 A schematic diagram of the structure of a wheeled vehicle provided according to some embodiments of this application is shown. Figure 2 A schematic diagram illustrating the switching process between a folded state and an unfolded state of a wheeled vehicle according to some embodiments of this application is shown. Figure 1 and Figure 2 As shown, the wheeled vehicle 001 may include a foldable frame 010, a first wheel 021, and a second wheel 022.

[0055] The foldable frame 010 serves as the skeleton of the wheeled vehicle 001. The foldable frame 010 can be made of metal, such as carbon steel, aluminum alloy, titanium alloy, carbon fiber, etc. It can also be a combination of various materials; this manual does not limit its application. In actual use, the foldable frame 010 can be covered with a flexible material to facilitate the loading of items. This flexible material can include fabrics, leather, and imitation leather.

[0056] The foldable frame 010 has a first assembly end 011 and a second assembly end 012. For example, as... Figure 1 In the wheeled vehicle 001 shown, the first assembly end 011 is located at the rear end of the wheeled vehicle 001, and the second assembly end 012 is located at the front end of the wheeled vehicle 001. Of course, in some other embodiments, the first assembly end 011 and the second assembly end 012 may also be located at the front end and rear end, or the left end and the right end of the wheeled vehicle 001, respectively.

[0057] The foldable carrier 010 also includes a foldable bottom frame 100. The bottom frame 100 has a frame structure. The bottom frame 100 is connected to the first assembly end 011 and the second assembly end 012. The structure of the bottom frame 100 will be described in detail below, and will not be repeated here.

[0058] The first wheel 021 is connected to the first assembly end 011. The second wheel 022 is connected to the second assembly end 012.

[0059] In such Figure 1 In the wheeled vehicle 001 shown, the first wheel 021 is the rear wheel and the second wheel 022 is the front wheel. It should be noted that in some embodiments, the first wheel 021 may also be the front wheel and the second wheel 022 the rear wheel. Those skilled in the art should understand that both the first wheel 021 and the second wheel 022, as either the front or rear wheel of the wheeled vehicle 001, are also within the scope of this specification. For illustrative purposes only, this disclosure uses... Figure 1 The structure in the example will be used for illustration.

[0060] The first wheel 021 and the second wheel 022 can be either pneumatic tires or solid rubber tires; this instruction manual does not limit this.

[0061] In some embodiments, the second wheel 022 can be a swivel wheel. In some embodiments, the outer diameter of the second wheel 022 is small, and it is located entirely below the chassis 100. This facilitates the steering of the second wheel 022. The outer diameter of the first wheel 021 can be larger than the outer diameter of the second wheel 022. This can enhance the stability of the wheeled vehicle 001 when moving on uneven ground and enhance the obstacle-crossing ability of the wheeled vehicle 001 on gravel roads and other road sections.

[0062] Furthermore, the wheeled vehicle 001 may also include a third wheel 023 and a fourth wheel 024. The third wheel 023 is connected to the first assembly end 011. The fourth wheel 024 is connected to the second assembly end 012. When the wheeled vehicle 001 is in the deployed state, the first wheel 021, the second wheel 022, the third wheel 023, and the fourth wheel 024 may be located at the four corners of the wheeled vehicle 001, respectively. The third wheel 023 may be structurally symmetrical or approximately symmetrical with the first wheel 021. The fourth wheel 024 may be structurally symmetrical or approximately symmetrical with the second wheel 022.

[0063] In some embodiments, such as Figure 1 and Figure 2As shown, the distance between the third wheel 023 and the first wheel 021 is greater than the distance between the fourth wheel 024 and the second wheel 022. Thus, when the wheeled vehicle 001 is in a folded state, the fourth wheel 024 and the second wheel 022 can be positioned within the gap between the third wheel 023 and the first wheel 021, preventing collisions between the wheels and reducing the space occupied by the wheeled vehicle 001. According to other embodiments of this application, the distance between the third wheel 023 and the first wheel 021 can also be less than the distance between the fourth wheel 024 and the second wheel 022. Thus, when the wheeled vehicle 001 is in a folded state, the third wheel 023 and the first wheel 021 can be positioned within the gap between the fourth wheel 024 and the second wheel 022.

[0064] like Figure 1 and Figure 2 As shown, the foldable carrier 010 also includes a foldable peripheral frame 200 based on a crank-slider structure 201. The peripheral frame 200, the chassis 100, and the first wheel 021 are connected at the first assembly end 011. The peripheral frame 200, the chassis 100, and the second wheel 022 are connected at the second assembly end 012. When the foldable carrier 010 is in the unfolded state, the peripheral frame 200 and the chassis 100 form an accommodating space 202. The peripheral frame 200 and the chassis 100 are linked in motion during folding and unfolding.

[0065] The structure of the peripheral support 200 is described in detail below.

[0066] Figure 3 A schematic diagram of a partial structure of a wheeled vehicle according to some embodiments of this application is shown. For example... Figures 1 to 3 As shown, the peripheral support 200 may include a first side frame 210, a third side frame 230, a second side frame 250, and a fourth side frame 260. The first side frame 210 and the third side frame 230 are spaced apart in a first direction D1. The second side frame 250 and the fourth side frame 260 are spaced apart in a second direction D2. The first side frame 210, the second side frame 250, the third side frame 230, and the fourth side frame 260 can form an accommodating space 202.

[0067] Both the first side frame 210 and the third side frame 230 can be based on the crank-slider structure 201, allowing both to fold and unfold along the first direction D1. Furthermore, the first side frame 210 and the third side frame 230 can fold and unfold synchronously. The first side frame 210 can connect to the first wheel 021 and the second wheel 022, and the third side frame 230 can connect to the third wheel 023 and the fourth wheel 024. When the first side frame 210 and the third side frame 230 fold synchronously, the first wheel 021 and the second wheel 022 move closer together, and the third wheel 023 and the fourth wheel 024 move closer together. When the first side frame 210 and the third side frame 230 unfold synchronously, the first wheel 021 and the second wheel 022 move further apart, and the third wheel 023 and the fourth wheel 024 move further apart. This allows for the folding and unfolding of the wheeled vehicle 001.

[0068] In some embodiments, such as Figure 1 and Figure 2 As shown, the first side frame 210 and the third side frame 230 can be configured to be structurally symmetrical or approximately symmetrical, such that the first side frame 210 and the third side frame 230 can be folded and unfolded synchronously. In other embodiments, the structure of the third side frame may also differ from that of the first side frame 210. For example, the third side frame may not include the crank-slider structure 201.

[0069] In some embodiments, such as Figure 1 and Figure 2 As shown, the first side frame 210 and the third side frame 230 can be folded and unfolded along the length of the wheeled vehicle 001. At this time, the second side frame 250 can be located at the rear end of the wheeled vehicle 001 and connects the first side frame 210 and the third side frame 230 along the width of the wheeled vehicle 001. The fourth side frame 260 can be located at the front end of the wheeled vehicle 001 and connects the first side frame 210 and the third side frame 230 along the width of the wheeled vehicle 001. Thus, both the second side frame 250 and the fourth side frame 260 can support the first side frame 210 and the third side frame 230 along the width of the wheeled vehicle 001, thereby fixing the width of the peripheral support 200.

[0070] In some embodiments, the second side frame 250 and the fourth side frame 260 may be configured to be structurally symmetrical or approximately symmetrical. In other embodiments, the structure of the second side frame 250 may also differ from that of the fourth side frame 260.

[0071] The structures of the first side frame 210, the third side frame 230, the second side frame 250 and the fourth side frame 260, the chassis 100 and the seat will be described in turn.

[0072] (I) First side frame 210

[0073] In some embodiments, such as Figure 1 and Figure 2 As shown, the first side frame 210 includes a first folding mechanism 211 and a second folding mechanism 221. The first folding mechanism 211 is based on the crank-slider structure 201, and the second folding mechanism 221 can be any foldable mechanism, such as a four-bar linkage, or it can be the same crank-slider mechanism as the first folding mechanism 211. Alternatively, the first side frame 210 may only have the first folding mechanism 211 and not include the second folding mechanism 221. In other embodiments, the first side frame 210 may include only one of the first folding mechanism 211 and the second folding mechanism 221. For example, the first folding mechanism 211 may also be directly connected to the first side frame 210 and the third side frame 230. The following description uses the example where both the first folding mechanism 211 and the second folding mechanism 221 are based on the crank-slider structure 201.

[0074] like Figure 1 and Figure 2 As shown, the first folding mechanism 211 includes a first crank-slider assembly 212. The first crank-slider assembly 212 is located above the chassis 100. The first crank-slider assembly 212 includes a first column 213, a first support rod 214, a first slider 215, and a first guardrail 216.

[0075] Specifically, the first column 213 is connected to the first assembly end 011 vertically or nearly vertically; the first slider 215 is slidably connected to the first column 213; the first guardrail 216 is rotatably connected to the first slider 215; one end of the first support rod 214 is rotatably connected to the first column 213 and the other end is rotatably connected to the first guardrail 216, thereby forming a crank-slider structure 201.

[0076] like Figure 1 and Figure 2 As shown, the first column 213 has a first lower end 2131 and a first upper end 2132. The first upper end 2132 is located above the first lower end 2131. The first lower end 2131 is connected to the first assembly end 011. The first lower end 2131 is also connected to the first wheel 021. During the folding and unfolding of the wheeled vehicle 001, the first column 213 can remain vertical or substantially vertical. At the same time, the first slider 215 is slidably connected to the first column 213. Thus, during the folding and unfolding of the wheeled vehicle 001, the first slider 215 can slide up and down along the extending direction of the first column 213.

[0077] In some embodiments, the first slider 215 is sleeved on the first post 213 to be slidably connected with the first post 213. For example, as... Figure 2 and Figure 3As shown, the first slider 215 is cylindrical and is sleeved on the first column 213.

[0078] In other embodiments, the first column 213 may also be provided with a sliding groove, and the first slider 215 is located inside the sliding groove and is slidably connected to the sliding groove. Figure 4 A schematic diagram of the mating structure of a first column and a first slider of a wheeled vehicle according to some embodiments of this application is shown. The first column 213 includes a groove 2133. The groove 2133 extends along the axial direction of the first column 213. The first slider 215 is located within the groove 2133 and is slidably connected to the groove 2133.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, a limiting sleeve 2134 is provided at the first upper end 2132. The outer diameter of the limiting sleeve 2134 is larger than the inner diameter of the cylindrical first slider 215. The limiting sleeve 2134 can reduce the risk that the first slider 215 will accidentally detach from the first column 213 from above.

[0080] The limiting sleeve 2134 also facilitates the connection of the first column 213 to other parts. For example, the first column 213 can be connected to the first support rod 214, the third guardrail 252 described below, and the push handle 060 described below via the limiting sleeve 2134.

[0081] like Figure 1 and Figure 2 As shown, the first support rod 214 has a first fixed end 2141 and a first movable end 2142. The first fixed end 2141 is rotatably connected to the first upper end 2132 (e.g., by a hinge), so that the first support rod 214 can pivot around the third pivot O3. In this way, the first support rod 214 can act as a "crank".

[0082] The first guardrail 216 has a first sliding end 2161, a first connection point 2162, and a first hinged end 2163. The first connection point 2162 may be located inside the first guardrail 216. In some embodiments, the first connection point 2162 is located between the first sliding end 2161 and the first hinged end 2163. The first sliding end 2161 is rotatably connected to the first slider 215, for example, by hinge, so that the first sliding end 2161 and the first slider 215 can slide along the extension direction of the first column 213, and the first guardrail 216 can rotate about a fourth pivot O4 disposed on the first slider 215. The first connection point 2162 is hinged to the first moving end 2142 of the first support rod 214, so that the first support rod 214 and the first guardrail 216 can rotate relative to each other about a fifth pivot O5, and the first connection point 2162 and the first moving end 2142 can perform an arc motion about a third pivot O3.

[0083] In some embodiments, such as Figure 1 and Figure 2 As shown, the first crank-slider assembly 212 is an isosceles crank-slider mechanism. That is, the distance between the third shaft O3 and the fifth shaft O5 is equal to or approximately equal to the distance between the fourth shaft O4 and the fifth shaft O5, forming an isosceles triangle. Thus, the angle (angular velocity) of the first support rod 214 rotating around the third shaft O3 is equal to the angle (angular velocity) of the first guardrail 216 rotating around the fourth shaft O4. This makes it easier for the first column 213 to remain perpendicular to the ground during the folding and unfolding of the wheeled vehicle 001.

[0084] like Figure 1 and Figure 2 As shown, during the folding process of the wheeled vehicle 001, the first sliding end 2161 and the first slider 215 slide downwards along the extension direction of the first column 213. The first support rod 214 rotates downwards around the third pivot O3 to move closer to the first column 213. At the same time, the first guardrail 216 rotates around the fourth pivot O4 toward the first column 213, making the angle A1 between the first guardrail 216 and the first column 213 smaller. In this way, the first guardrail 216 and the first column 213 move closer to each other, realizing the folding of the first folding mechanism 211.

[0085] During the unfolding of the wheeled vehicle 001, the first folding mechanism 211 unfolds. The unfolding process of the first folding mechanism 211 is the reverse process of the folding process, and will not be described in detail here.

[0086] like Figure 1 and Figure 2As shown, in some embodiments, the second folding mechanism 221 may further include a second crank-slider assembly 222. The second crank-slider assembly 222 is located above the chassis 100. The second crank-slider assembly 222 includes a second column 223, a second support rod 224, a second slider 225, and a second guardrail 226.

[0087] Specifically, the second column 223 is connected to the second assembly end 012 vertically or nearly vertically; the second slider 225 is slidably connected to the second column 223; the second guardrail 226 is rotatably connected to the second slider 225; one end of the second support rod 224 is rotatably connected to the second column 223, and the other end is rotatably connected to the second guardrail 226, thereby forming a crank-slider structure 201.

[0088] The second column 223 has a second lower end 2231 and a second upper end 2232. The second upper end 2232 is located above the second lower end 2231. The second lower end 2231 is connected to the second assembly end 012. The second lower end 2231 is also connected to the second wheel 022. During the folding and unfolding of the wheeled vehicle 001, the second column 223 can remain in a vertical or substantially vertical state. The second slider 225 is slidably connected to the second column 223, and the second slider 225 can slide up and down along the extending direction of the second column 223.

[0089] In some embodiments, the second slider 225 is sleeved on the second post 223 to be slidably connected with the second post 223. For example, as... Figure 2 and Figure 3 As shown, the second slider 225 is cylindrical and is sleeved on the cylindrical second post 223. In other embodiments, with Figure 4 Similarly, the second column 223 can also be provided with a sliding groove, and the second slider 225 is located inside the sliding groove and is slidably connected to the sliding groove.

[0090] The second support rod 224 has a second fixed end 2241 and a second movable end 2242. The second fixed end 2241 is hinged to the second upper end 2232, so that the second support rod 224 can pivot around the sixth pivot O6. In this way, the second support rod 224 can act as a "crank".

[0091] The second guardrail 226 has a second sliding end 2261, a second connecting point 2262, and a second hinged end 2263. The second connecting point 2262 may be located inside the second guardrail 226. In some embodiments, the second connecting point 2262 is located between the second sliding end 2261 and the second hinged end 2263. The second sliding end 2261 is rotatably connected to the second slider 225 (e.g., hinged), so that the second sliding end 2261 and the second slider 225 can slide along the extension direction of the second column 223, and the second guardrail 226 can rotate about a seventh pivot O7 provided on the second slider 225. The second connecting point 2262 is rotatably connected to the second moving end 2242 (e.g., hinged), so that the second support rod 224 and the second guardrail 226 can rotate relative to each other about an eighth pivot O8, and the second connecting point 2262 and the second moving end 2242 can perform an arc motion about a sixth pivot O6.

[0092] During the folding process of the wheeled vehicle 001, the second sliding end 2261 and the second slider 225 slide downwards along the extension direction of the second column 223. The second support rod 224 rotates around the sixth pivot O6 to move closer to the second column 223. At the same time, the second guardrail 226 rotates around the seventh pivot O7 toward the second column 223, making the angle A2 between the second guardrail 226 and the second column 223 smaller. In this way, the second guardrail 226 and the second column 223 move closer to each other, realizing the folding of the second folding mechanism 221.

[0093] During the unfolding of the wheeled vehicle 001, the second folding mechanism 221 unfolds. The unfolding process of the second folding mechanism 221 is the reverse process of the folding process, and will not be described in detail here.

[0094] In some embodiments, such as Figure 1 and Figure 2 As shown, the second crank-slider assembly 222 is an isosceles crank-slider mechanism. That is, the distance between the sixth pivot O6 and the eighth pivot O8 is equal to or approximately equal to the distance between the seventh pivot O7 and the eighth pivot O8, forming an isosceles triangle. Thus, the angle and angular velocity of the second support rod 224 rotating around the sixth pivot O6 are equal to the angle and angular velocity of the second guardrail 226 rotating around the seventh pivot O7. This makes it easier for the first column 213 to remain perpendicular to the ground during the folding and unfolding of the wheeled vehicle 001.

[0095] In some embodiments, such as Figure 1 and Figure 2As shown, the portion of the first guardrail 216 between the first sliding end 2161 and the first connection point 2162 may be located below the first support rod 214, and the portion of the second guardrail 226 between the second sliding end 2261 and the second connection point 2262 may be located below the second support rod 224. The first guardrail 216, the first support rod 214, the second guardrail 226, and the second support rod 224 may form the upper edge of the second side frame 250.

[0096] In some embodiments, such as Figure 1 and Figure 2 As shown, when the foldable frame 010 is unfolded, the first fixed end 2141 is higher than the first movable end 2142, and the second fixed end 2241 is higher than the second movable end 2242. That is, the third pivot O3 is higher than the fifth pivot O5, and the sixth pivot O6 is higher than the eighth pivot O8. The fifth pivot O5 can be located between the fourth pivot O4 and the ninth pivot O9, and the eighth pivot O8 can be located between the seventh pivot O7 and the ninth pivot O9. Therefore, when the foldable frame 010 is folded, the first support rod 214 applies a downward force to the first guardrail 216, and the second support rod 224 applies a downward force to the second guardrail 226. Under the action of the first support rod 214 and the second support rod 224, the first sliding end 2161 and the second sliding end 2261 slide downwards. This helps maintain the stability of the foldable frame 010 during the folding process.

[0097] The second folding mechanism 221 is rotatably connected (e.g., hinged) to the first hinge end 2163 so that the second folding mechanism 221 and the first folding mechanism 211 can be folded and unfolded simultaneously. Furthermore, the second hinge end 2263 is hinged to the first hinge end 2163, thereby allowing the first guardrail 216 and the second guardrail 226 to rotate relative to each other around the ninth pivot O9, thus enabling folding and unfolding between the first guardrail 216 and the second guardrail 226.

[0098] In some embodiments, such as Figure 1 and Figure 2 As shown, when the foldable frame 010 is in the unfolded state, the first hinge end 2163 is higher than the first sliding end 2161, and the second hinge end 2263 is higher than the second sliding end 2261. That is, the ninth pivot O9 is higher than the fourth pivot O4, and the ninth pivot O9 is higher than the seventh pivot O7. At this time, the first column 213 and the second column 223 are at their farthest interval in the first direction D1. The angle A1 between the first guardrail 216 and the first column 213 is an acute angle, and the angle A2 between the second guardrail 226 and the second column 223 is an acute angle. The structure formed by the first guardrail 216 and the second guardrail 226 is arched and arches upward.

[0099] During the folding process of the wheeled vehicle 001, the first upright 213 and the second upright 223 move closer together, causing the first guardrail 216 and the second guardrail 226 to rotate around the ninth pivot O9 toward each other. The first guardrail 216 and the second guardrail 226 come closer together, reducing the included angle A3 between them. The first hinge end 2163 and the second hinge end 2263 move upwards. This prevents interference between the first guardrail 216, the second guardrail 226 and the chassis 100. This allows for folding between the first guardrail 216 and the second guardrail 226.

[0100] During the unfolding of the wheeled vehicle 001, the first guardrail 216 and the second guardrail 226 unfold together. The unfolding process between the first guardrail 216 and the second guardrail 226 is the reverse process of the folding process, and will not be described in detail here.

[0101] In conclusion, as follows: Figure 1 and Figure 2 As shown, during the folding process of the wheeled vehicle 001, the first side frame 210 can be folded in the following manner: the first column 213 and the second column 223 move closer to each other, so that the angle A1 between the first guardrail 216 and the first column 213 becomes smaller, the angle A3 between the first guardrail 216 and the second guardrail 226 becomes smaller, and the angle A2 between the second guardrail 226 and the second column 223 becomes smaller.

[0102] Figure 5 A partial cross-sectional structural schematic diagram of the ninth axle of a wheeled vehicle provided according to some embodiments of this application is shown. In some embodiments, such as Figure 1 , Figure 2 and Figure 5 As shown, the first guardrail 216 includes a first rod 2164, a bent first sleeve 2165, and a cylindrical first shell 2168. The first sleeve 2165 includes a first part 2166 and a second part 2167, with an obtuse angle between the first part 2166 and the second part 2167. The first part 2166 is fitted onto the first rod 2164, and the second part 2167 connects the first part 2166 and the first shell 2168. When the foldable carrier 010 is in the unfolded state, the first part 2166 extends obliquely upward from the first rod 2164, and the extension direction of the second part 2167 is approximately parallel to the first direction D1. The angle between the extension direction of the first part 2166 and the first direction D1 is an obtuse angle. In this way, the first guardrail 216 can provide a good handhold with the help of the second part 2167.

[0103] The second guardrail 226 includes a second rod 2264, a bent second sleeve 2265, and a cylindrical second shell 2268. The second sleeve 2265 includes a third part 2266 and a fourth part 2267, with an obtuse angle between the third part 2266 and the fourth part 2267. The third part 2266 is fitted onto the second rod 2264, and the fourth part 2267 connects the third part 2266 and the second shell 2268. When the foldable carrier 010 is in the unfolded state, the third part 2266 extends obliquely upward from the second rod 2264, and the extension direction of the fourth part 2267 is approximately parallel to the first direction D1. The angle between the extension direction of the third part 2266 and the first direction D1 is an obtuse angle. In this way, the second guardrail 226 can provide a good handhold with the help of the fourth part 2267.

[0104] The first housing 2168 and the second housing 2268 are rotatably fastened together. The first hinge end 2163 and the second hinge end 2263 are hinged through the first housing 2168 and the second housing 2268. A first limiting part 2169 is provided inside the first housing 2168. A second limiting part 2269 is provided inside the second housing 2268. When the foldable carrier 010 is in the unfolded state, the first limiting part 2169 abuts against the second limiting part 2269, restricting the first guardrail 216 and the second guardrail 226 from rotating relative to each other in the direction where the included angle A3 increases.

[0105] In other embodiments, the first side frame 210 is provided with a locking structure. When the locking structure is in the locked state, it restricts relative rotation between the first housing 2168 and the second housing 2268. When the locking structure is in the unlocked state, it allows relative rotation between the first housing 2168 and the second housing 2268. For example, the locking structure is a mating pin and a pin hole. When the pin is inserted into the pin hole, the locking structure is in the locked state. When the pin is outside the pin hole, the locking structure is in the unlocked state. The locking structure is used to prevent the wheeled vehicle 001 from folding and unfolding uncontrollably.

[0106] (II) Third side frame 230

[0107] like Figure 1 , Figure 2 and Figure 3As shown, the third side frame 230 includes a third column 233 and a fourth column 243. The third column 233 is located at the rear end of the wheeled vehicle 001. The lower end of the third column 233 is connected to the first assembly end 011 and to the third wheel 023. The fourth column 243 is located at the front end of the wheeled vehicle 001. The lower end of the fourth column 243 can be connected to the second assembly end 012 and to the fourth wheel 024. Along the first direction D1, the third column 233 and the fourth column 243 are spaced apart by a certain distance. Along the second direction D2, the third column 233 and the first column 213 are spaced apart by a certain distance, and the second column 223 and the fourth column 243 are spaced apart by a certain distance. Further, the first column 213, the second column 223, the third column 233, and the fourth column 243 are located at the four corners of the wheeled vehicle 001, respectively. The third column 233 and the first column 213 are structurally symmetrical. The second column 223 and the fourth column 243 are structurally symmetrical.

[0108] The structure of the third side frame 230 can be the same as that of the first side frame 210. For specific details, please refer to the relevant description of the first side frame 210, which will not be repeated here.

[0109] (III) Second side frame 250, fourth side frame 260

[0110] like Figure 1 , Figure 2 and Figure 3 As shown, the second side frame 250 includes a first base rod 251 and a third guardrail 252. The third guardrail 252 can be located above the first base rod 251, thereby forming the upper edge of the second side frame 250. The first base rod 251 is located at the first assembly end 011. The first base rod 251 can be fixedly connected to the first column 213 and the third column 233, and is configured to fix the first column 213 and the third column 233 from below. The third guardrail 252 is configured to fix the first column 213 and the third column 233 from above. By fixing the first column 213 and the third column 233, the width of the rear end of the peripheral support 200 can be fixed by the first base rod 251 and the third guardrail 252.

[0111] The fourth side frame 260 includes a second base rod 261 and a fourth guardrail 262. The fourth guardrail 262 can be located above the second base rod 261, thus forming the upper edge of the fourth side frame 260. The second base rod 261 is located at the second assembly end 012. The second base rod 261 can be fixedly connected to the second column 223 and the fourth column 243, and is configured to fix the second column 223 and the fourth column 243 from below. The fourth guardrail 262 is configured to fix the second column 223 and the fourth column 243 from above. The second base rod 261 and the fourth guardrail 262 can fix the width of the front end of the peripheral support 200 by fixing the second column 223 and the fourth column 243. The second side frame 250 and the fourth side frame 260 can be configured to be structurally symmetrical or approximately symmetrical.

[0112] (iv) Chassis

[0113] Corresponding to the folding of the peripheral support 200, the chassis 100 can also fold along the first direction D1. The user can control the folding of the chassis 100, which in turn drives the folding of the peripheral support 200. The structure of the chassis 100 and the linkage between the chassis 100 and the peripheral support 200 are described in detail below.

[0114] Figure 6 A schematic diagram of the chassis of a wheeled vehicle according to some embodiments of this application is shown. Figure 1 , Figure 2 and Figure 6 As shown, chassis 100 includes a first chassis 110 and a second chassis 120. The first chassis 110 has a first end 101 and a second end 102. The first end 101 forms a first hinge connection 105 with a first assembly end 011, and connects a first wheel 021 and a third wheel 023 through the first assembly end 011. The second chassis 120 has a third end 103 and a fourth end 104. The fourth end 104 forms a second hinge connection 106 with a second assembly end 012, and connects a second wheel 022 and a fourth wheel 024 through the second assembly end 012. The third end 103 and the second end 102 form a third hinge connection 107. The first chassis 110 and the second chassis 120 are arranged along a first direction D1.

[0115] When the wheeled vehicle 001 needs to be folded, the user can pull the second end 102 of the first chassis 110 and the third end 103 of the second chassis 120 upwards. As the wheels rotate, the first end 101 of the first chassis 110 and the fourth end 104 of the second chassis 120 can move closer together, thus achieving the folding of the chassis 100. During the folding process, the chassis 100 can drive the first assembly end 011 and the second assembly end 012 to move closer together. The first assembly end 011 and the second assembly end 012 can drive the first side frame 210 and the third side frame 230 to fold, and drive the second side frame 250 and the fourth side frame 260 to move closer together. The first chassis 110 can rotate around the second pivot O2 and move closer to the second side frame 250 during rotation. The second chassis 120 can rotate around the tenth pivot O10 and move closer to the fourth side frame 260 during rotation. This achieves the folding of the wheeled vehicle 001.

[0116] In some embodiments, such as Figure 1 , Figure 2 and Figure 6 As shown, the first chassis 110 includes a first connecting rod 111, a third connecting rod 112, and a first reinforcing rod 113. The first connecting rod 111 and the third connecting rod 112 are arranged at intervals along a second direction D2. The first reinforcing rod 113 connects the first connecting rod 111 and the third connecting rod 112. The first connecting rod 111 forms a first hinge connection 105 with the first assembly end 011 at its first end 101.

[0117] The second chassis 120 includes a second connecting rod 121. The second connecting rod 121 forms a second hinge connection 106 with the second assembly end 012 at the fourth end 104. For other structural components of the second chassis 120, please refer to the relevant description of the first chassis 110, which will not be repeated here.

[0118] The first link 111 and the second link 121 form a third hinge connection 107 at the second end 102 and the third end 103. The first link 111 and the second link 121 are rotatably connected by a first pivot O1. The first link 111 and the first assembly end 011 are rotatably connected by a second pivot O2. Both the first pivot O1 and the second pivot O2 extend along a second direction D2. The second direction D2 is perpendicular to the first direction D1. Therefore, the wheeled vehicle 001 does not fold in the second direction D2.

[0119] In some embodiments, such as Figure 1 , Figure 2 and Figure 6As shown, the third end 103 of the second chassis 120 includes a stopper 108. In the unfolded state of the chassis 100, the first chassis 110 and the second chassis 120 are coplanar. The stopper 108 abuts against the first chassis 110, preventing the first chassis 110 and the second chassis 120 from continuing to rotate along the third hinge connection 107, thus preventing the chassis 100 from concave towards the ground. For example, the stopper 108 is rod-shaped. In the unfolded state of the chassis 100, the stopper 108 is located above the side of the first pivot O1 near the first bottom rod 251, and the lower edge of the stopper 108 abuts against the upper edge of the first chassis 110.

[0120] In some embodiments, the second end 102 of the first chassis 110 includes a stopper. When the chassis 100 is in the unfolded / deployed state, the first chassis 110 and the second chassis 120 are coplanar, and the stopper abuts against the second chassis 120, preventing the first chassis 110 and the second chassis 120 from continuing to rotate along the third hinge connection 107 to prevent the chassis 100 from concave towards the ground. For example, the stopper is rod-shaped. When the chassis 100 is in the unfolded state, the stopper is located below the side of the first pivot O1 near the second bottom rod 261, and the upper edge of the stopper abuts against the lower edge of the second chassis 120.

[0121] (V) Seating

[0122] like Figures 1 to 3 As shown, the foldable carrier 010 may further include a first seat 310 and a first seat support 410. The lower end of the first seat support 410 is fixedly connected to the first assembly end 011, and the upper end of the first seat support 410 is rotatably connected to the first seat 310. The first seat 310 can rotate relative to the first seat support 410 by rotating about the eleventh pivot O11. When unfolded, the first seat 310 is approximately parallel to the ground and can be used by infants and toddlers. When the wheeled vehicle 001 needs to be folded, the user can control the chassis 100 to fold, thereby causing the first seat 310 to fold. The structure of the first seat 310 and the linkage between the chassis 100 and the first seat 310 are described below.

[0123] like Figures 1 to 3As shown, there is a first distance L1 between the first end 101 and the second end 102 of the first chassis 110. The first distance L1 is greater than the minimum gap distance L2 between the first seat 310 and the first end 101. That is, the first chassis 110 rotates about the second pivot O2 relative to the first assembly end 011. The first seat 310 rotates about the eleventh pivot O11 relative to the first seat support 410. The gap distance L2 between the first seat 310 and the first end 101 is the gap distance between the second pivot O2 and the eleventh pivot O11. The first distance L1 is greater than the gap distance between the second pivot O2 and the eleventh pivot O11. Or, in other words, when the first chassis 110 is unfolded, its length along the first direction D1 is greater than the gap distance L2 between the first seat 310 and the first end 101. When the first seat 310 is unfolded, it can be located above the first chassis 110. When the first chassis 110 rotates upward, the first chassis 110 will touch the first seat 310. This creates a linkage between the first chassis 110 and the first seat 310, allowing the first chassis 110 to rotate the first seat 310 upwards. This enables the first seat 310 to fold reliably. This folding method of the first seat 310 reduces structural constraints on the first seat 310, thereby simplifying the structure of the foldable carrier 010.

[0124] In some embodiments, such as Figures 1 to 3 As shown, the first seat support 410 is located within the gap between the first column 213 and the third column 233. The lower end of the first seat support 410 is fixedly connected to the first base rod 251. The third guardrail 252 is located above the first seat support 410. Thus, the installation of the first seat support 410 does not increase the space occupied by the foldable frame 010, and the first seat support 410 can avoid other structures of the foldable frame 010, which is beneficial for the folding of the foldable frame 010.

[0125] In some embodiments, such as Figures 1 to 3 As shown, the first seat support 410 includes a positioning rod 413, a first support rod 411, and a second support rod 412. The positioning rod 413 extends along a second direction D2. When the wheeled vehicle 001 is deployed, both the first support rod 411 and the second support rod 412 extend along the height direction of the wheeled vehicle 001. The lower end of the first support rod 411 is fixedly connected to the first base rod 251, and the lower end of the second support rod 412 is also fixedly connected to the first base rod 251. The positioning rod 413 connects the upper ends of the first support rod 411 and the second support rod 412. In this way, the positioning rod 413 can be fixed above the first base rod 251 via the first support rod 411 and the second support rod 412. The positioning rod 413 is rotatably connected to the first seat 310. The first seat 310 can rotate around the positioning rod 413. Thus, the first seat support 410 can also constrain the position of the rotation axis of the first seat 310.

[0126] In some embodiments, the first seat support 410 may omit the first support rod 411 and the second support rod 412. One end of the positioning rod 413 is connected to the first column 213, and the other end is connected to the third column 233. This simplifies the structure of the wheeled vehicle 001. In this case, the first slider 215 on the first column 213 is configured to avoid the positioning rod 413 when sliding along the first column 213. For example, the first slider 215 and the first column 213 are configured as follows: Figure 4 As shown in the structure, the positioning rod 413 is fixedly connected to the outer wall of the first column 213.

[0127] In some embodiments, such as Figures 1 to 3 As shown, the distance between the eleventh pivot O11 and the third guardrail 252 is less than the radial dimension of the first seat 310 in the direction perpendicular to the eleventh pivot O11. When the first seat 310 rotates upward to touch the third guardrail 252, it will be prevented from continuing to rotate by the third guardrail 252. In this way, the third guardrail 252 can limit the rotation range of the first seat 310.

[0128] In some embodiments, when the first chassis 110 rotates upward, at least one of the first connecting rod 111, the third connecting rod 112, or the first reinforcing rod 113 can touch the first seat 310 and drive the first seat 310 to rotate upward, thereby folding the first seat 310. For example, the first seat 310 includes a first seat rod 311, a second seat rod 312, and a third seat rod 313 connected in sequence. The first seat rod 311 and the third seat rod 313 both extend along a first direction D1 and are rotatably connected to the first seat support 410. The second seat rod 312 connects the first seat rod 311 and the third seat rod 313 along a second direction D2. When the first chassis 110 rotates upward, the first connecting rod 111 can touch the first seat rod 311, and the third connecting rod 112 can touch the third seat rod 313, thereby realizing the folding of the first seat 310.

[0129] like Figures 1 to 3 As shown, when the first seat 310 is unfolded, its upper edge is nearly parallel to the horizontal plane to facilitate seating for infants and toddlers. In some embodiments, the upper edge of the first seat 310 may extend slightly upward from the positioning rod 413 to reduce the risk of the infant or toddler slipping off the first seat 310. For example, as Figure 2 As shown, when the first seat 310 is unfolded, the angle A4 between the upper edge of the first seat 310 and the vertical direction ranges from 70° to 90°. The first seat 310 can rotate upwards relatively freely, but its downward rotation is restricted, which enhances the support effect of the first seat 310 on infants and young children.

[0130] Figure 7An exploded view of the first seat of a wheeled vehicle provided according to some embodiments of this application is shown. Figure 8 A cross-sectional structural schematic diagram of the first seat of a wheeled vehicle provided according to some embodiments of this application is shown.

[0131] In some embodiments, such as Figure 7 and Figure 8 As shown, a positioning structure 500 is provided at the connection between the first seat 310 and the first seat support 410. When the first seat 310 is unfolded, the positioning structure 500 is configured to restrict the first seat 310 from rotating downwards. For example, a first connector 510 is provided at one end of the positioning rod 413, and a third connector 530 is provided at the other end of the positioning rod 413. A second connector 520 is provided at the end of the first seat rod 311 away from the second seat rod 312, and a fourth connector 540 is provided at the end of the third seat rod 313 away from the second seat rod 312.

[0132] Both the first connector 510 and the third connector 530 are configured as approximately T-junctions. The first connector 510 connects the first support rod 411, the positioning rod 413, and the second connector 520. The third connector 530 connects the second support rod 412, the positioning rod 413, and the fourth connector 540. Both the second connector 520 and the fourth connector 540 are configured as approximately B-junctions. The second connector 520 connects the first connector 510 and the first seat rod 311. The fourth connector 540 connects the third connector 530 and the second seat rod 312.

[0133] These connectors differ from conventional two-way and three-way connectors in that they have structures for rotatable connection and structures for positioning. For example, the first connector 510 and the second connector 520 are rotatably connected and configured to prevent further rotation once they have been rotated to a preset position. The third connector 530 and the fourth connector 540 are rotatably connected and configured to prevent further rotation once they have been rotated to a preset position. This allows the first seat 310 to be confined to a near-horizontal position.

[0134] In some embodiments, the first connector 510 has a first positioning portion 511. The second connector 520 has a second positioning portion 521. The third connector 530 has a third positioning portion. The fourth connector 540 has a fourth positioning portion 541. When the first connector 510 and the second connector 520 rotate relative to each other to a preset position, the first positioning portion 511 abuts against the second positioning portion 521 to prevent the first connector 510 and the second connector 520 from continuing to rotate relative to each other. When the third connector 530 and the fourth connector 540 rotate relative to each other to a preset position, the third positioning portion (not shown) abuts against the fourth positioning portion 541 to prevent the third connector 530 and the fourth connector 540 from continuing to rotate relative to each other.

[0135] In other embodiments, the pivot of the first seat 310 is provided with a pin-type or snap-type locking structure to prevent the first seat 310 from rotating uncontrollably.

[0136] In some embodiments, the eleventh pivot O11 is parallel to the second direction D2. The dimension of the first seat 310 along the second direction D2 is larger than the width dimension of the first chassis 110 along the second direction D2. This ensures that the first chassis 110 can effectively contact the first seat 310, improving the reliability of the folding process of the first seat 310.

[0137] In some embodiments, such as Figures 1 to 3 As shown, the foldable carrier 010 may further include a second seat 320 and a second seat support 420. The lower end of the second seat support 420 is fixedly connected to the second assembly end 012, and the upper end of the second seat support 420 is rotatably connected to the second seat 320. When the second chassis 120 moves upward, it can drive the second seat 320 to rotate upward for folding. The second seat 320 may be structurally symmetrical with the first seat 310, and the second seat support 420 may be structurally symmetrical with the first seat support 410. The structures of the second seat 320 and the second seat support 420 will not be described in detail here.

[0138] In some embodiments, such as Figure 1 , Figure 2 and Figure 6 As shown, the wheeled vehicle 001 also includes a pulling part 031. The pulling part 031 is located near the third hinge connection 107. When the user pulls the pulling part 031, the second end 102 of the first chassis 110 and the third end 103 of the second chassis 120 move upward, causing the chassis 100 to fold, which in turn causes the peripheral support 200 based on the crank-slider structure 201 to fold, as well as the first seat 310 and the second seat 320 to fold.

[0139] For example, the stopper 108 is located near the third hinge connection 107, and the lifting member 031 is connected to the stopper 108. When the user lifts the lifting member 031, the stopper 108 moves upward and drives the second end 102 of the first chassis 110 and the third end 103 of the second chassis 120 to move upward.

[0140] The chassis 100 may be covered with a flexible material. A lifting member 031 can pass through the flexible material, and a portion of the lifting member 031 may be located above the flexible material. The lifting member 031 allows the user to precisely apply a lifting action towards the center of the chassis 100. In some embodiments, the lifting member 031 is a soft rope or strap, which reduces the space occupied by the lifting member 031.

[0141] In some embodiments, such as Figures 1 to 3As shown, the foldable carrier 010 includes a pull rod 050. A user can pull the wheeled vehicle 001 forward using the pull rod 050. One end of the pull rod 050 is provided with a pull ring 051, and the other end of the pull rod 050 is rotatably connected to the second assembly end 012. By rotating relative to the first assembly end 011 or the second assembly end 012, the pull rod 050 can be moved towards the second side frame 250 or the fourth side frame 260, thus folding the pull rod 050. In some other embodiments, one end of the pull rod 050 is provided with a pull ring 051, and the other end of the pull rod 050 is rotatably connected to the first assembly end 011.

[0142] In some embodiments, such as Figures 1 to 3 As shown, the foldable frame 010 includes a push handle 060. The push handle 060 is rotatably connected to a first upper end 2132 and also rotatably connected to the upper end of a third column 233. By rotating relative to the first upper end 2132, the push handle 060 can be brought closer to the second side frame 250, thus folding the push handle 060. In other embodiments, the push handle 060 is rotatably connected to a second upper end 2232 and also rotatably connected to the upper end of a fourth column 243. By rotating relative to the second upper end 2232, the push handle 060 can be brought closer to the fourth side frame 260, thus folding the push handle 060.

[0143] In summary, the wheeled vehicle 001 provided in this specification can achieve coordinated folding of the chassis 100, the peripheral support 200, and the first seat 310, thereby improving folding efficiency.

[0144] The foregoing has described specific embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0145] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0146] Furthermore, certain terms used in this application have been used to describe embodiments of this application. For example, "an embodiment," "an embodiment," and / or "some embodiments" mean that a particular feature, structure, or characteristic described in connection with that embodiment may be included in at least one embodiment of this application. Therefore, it is to be emphasized and understood that two or more references to "an embodiment" or "an embodiment" or "alternative embodiment" in various parts of this application do not necessarily refer to the same embodiment. Moreover, specific features, structures, or characteristics may be appropriately combined in one or more embodiments of this application.

[0147] It should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0148] Every patent, patent application, publication of a patent application, and other material, such as articles, books, specifications, publications, documents, and literature (excluding any related historical examination documents), cited in this disclosure is incorporated herein for all purposes, including, for example, in the specification and claims of this disclosure. However, in the event of any inconsistency or conflict between the descriptions, definitions, and / or terms used in the foregoing and those used in this disclosure, the descriptions, definitions, and / or terms used in this disclosure shall prevail.

[0149] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A foldable wheeled vehicle, characterized in that, include: A foldable carrier, having a first assembly end and a second assembly end, and comprising: A foldable chassis, connected to the first assembly end and the second assembly end; and A foldable peripheral support based on a crank-slider structure is connected to the chassis to form an accommodating space; wherein, the peripheral support and the chassis are linked when folded and unfolded. The first wheel is connected to the first assembly end; and The second wheel is connected to the second assembly end.

2. The wheeled vehicle according to claim 1, characterized in that, The peripheral support includes: a first side frame based on the crank-slider structure, including a first folding mechanism; the first folding mechanism includes a first crank-slider assembly; the first crank-slider assembly includes: The first column has a first lower end and a first upper end; the first lower end is connected to the first assembly end. The first support rod has a first fixed end and a first movable end, and the first fixed end is hinged to the first upper end. The first slider is slidably connected to the first column; The first guardrail has a first sliding end, a first connecting point, and a first hinge end; The first sliding end is hinged to the first slider; The first connection point is hinged to the first mobile end.

3. The wheeled vehicle according to claim 2, characterized in that, The first slider is sleeved on the first column so as to slide and connect with the first column.

4. The wheeled vehicle according to claim 2, characterized in that, The first column includes a sliding groove; The chute extends along the axial direction of the first column; The first slider is located inside the groove and is slidably connected to the groove.

5. The wheeled vehicle according to claim 2, characterized in that, The first side frame also includes a second folding mechanism, which is hinged to the first hinge end.

6. The wheeled vehicle according to claim 5, characterized in that, The second folding mechanism includes a second crank-slider assembly; the second crank-slider assembly includes: The second column has a second lower end and a second upper end; the second lower end is connected to the second assembly end. The second support rod has a second fixed end and a second movable end, and the second fixed end is hinged to the second upper end. The second slider is slidably connected to the second column; The second guardrail has a second sliding end, a second connecting point, and a second hinge end; The second sliding end is hinged to the second slider; The second connection point is hinged to the second moving end; The second hinge end is hinged to the first hinge end.

7. The wheeled vehicle according to claim 6, characterized in that, The first crank-slider assembly is an isosceles crank-slider mechanism; the second crank-slider assembly is an isosceles crank-slider mechanism; Both the first crank-slider assembly and the second crank-slider assembly are located above the chassis.

8. The wheeled vehicle according to claim 6, characterized in that, When the foldable frame is in the unfolded state, the first hinge end is higher than the first sliding end; the second hinge end is higher than the second sliding end.

9. The wheeled vehicle according to claim 2, characterized in that, The chassis includes: A first chassis, having a first end and a second end, wherein the first end and the first assembly end are connected by a first hinge; and The second chassis has a third end and a fourth end, the fourth end being connected to the second assembly end by a second hinge, and the third end being connected to the second end by a third hinge; wherein the first chassis and the second chassis are arranged along a first direction.

10. The wheeled vehicle according to claim 9, characterized in that, The first chassis includes a first link, and the second chassis includes a second link; The first link forms the first hinge connection between the first end and the first assembly end; The second link forms a second hinge connection with the second assembly end at the fourth end; The first link at the second end and the second link at the third end form the third hinge connection.

11. The wheeled vehicle according to claim 10, characterized in that, The first link and the second link are rotatably connected by a first pivot; the first pivot extends along a second direction; wherein the second direction is perpendicular to the first direction.

12. The wheeled vehicle according to claim 9, characterized in that, The second end of the first chassis includes a stop; in the unfolded state, the first chassis and the second chassis are coplanar, and the stop abuts against the second chassis, preventing the first chassis and the second chassis from continuing to rotate along the third hinge connection so that the chassis is recessed towards the ground; or The third end of the second chassis includes a stopper; in the unfolded state, the first chassis and the second chassis are coplanar, and the stopper abuts against the first chassis to prevent the first chassis and the second chassis from continuing to rotate along the third hinge connection so that the chassis is recessed towards the ground.

13. The wheeled vehicle according to claim 10, characterized in that, It also includes a lifting element located near the third hinge connection; When the user pulls the lifting component, the second end of the first chassis and the third end of the second chassis move upward, causing the chassis to fold and the crank-slider structure to fold.

14. The wheeled vehicle according to claim 9, characterized in that, The peripheral support also includes a second side frame, which is connected to the first side frame along a second direction and is configured to fix the peripheral support in the second direction. The second direction is perpendicular to the first direction.

15. The wheeled vehicle according to claim 2, characterized in that, The foldable carrier includes a handle, one end of which is provided with a pull ring. The other end of the hand lever is rotatably connected to the second assembly end, or the other end of the hand lever is rotatably connected to the first assembly end.

16. The wheeled vehicle according to claim 2, characterized in that, The foldable carrier includes a push handle. The push handle is rotatably connected to the first upper end.

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