vehicle

Abstract

This invention relates to a carrier, which includes a support frame and a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The support frame includes a surrounding frame, a support frame disposed below the surrounding frame, and a support assembly connected between the surrounding frame and the support frame. The support assembly is foldable in the vertical direction. During the vertical folding process of the surrounding frame and the support frame, the first wheel frame of the first wheel assembly and the second wheel frame of the second wheel assembly can rotate towards each other and retract relative to the support frame, so that the first wheel body and the second wheel body move closer to each other in the front-back direction. This reduces the number of operation steps, decreases the overall size of the folded carrier, and also makes the structure of the folded carrier flatter.

Description

Technical Field

[0001] This invention relates to the field of carrier technology, specifically to a carrier. Background Technology

[0002] Foldable vehicles such as strollers and tow carts provide convenience for people to carry their belongings or for children to travel. Currently, the structures of vehicles on the market vary, with different numbers of rods, connections between rods, and folding principles. However, how to make a vehicle have a small size after folding while maintaining good load-bearing capacity has always been a goal pursued by those skilled in the art. Summary of the Invention

[0003] The purpose of this invention is to provide a vehicle.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a carrier having an unfolded state and a folded state, the carrier comprising: A load-bearing frame, comprising a surrounding frame, a load-bearing frame disposed below the surrounding frame, and a support component connecting the surrounding frame and the load-bearing frame, the support component being foldable in the vertical direction; The wheel assembly includes a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The first wheel assembly includes a first wheel frame and a first wheel body disposed on the first wheel frame. The second wheel assembly includes a second wheel frame and a second wheel body disposed on the second wheel frame. The first wheel frame and the second wheel frame are rotatably connected to the support frame. The first wheel frame and the second wheel frame are respectively movably connected to the support assembly, so as to drive the first wheel frame and the second wheel frame to rotate in opposite directions and retract with the support frame during the process of the support assembly folding in the vertical direction.

[0005] In some embodiments, when the vehicle is in an unfolded state, the support assembly unfolds in the vertical direction and is supported between the enclosure frame and the support frame, and the enclosure frame, the support frame and the support assembly cooperate with each other to form a load-bearing space; When the vehicle is in a folded state, the support assembly is folded up and down between the enclosure frame and the support frame. The first wheel frame and the second wheel frame are respectively folded up and down relative to the support frame, and the first wheel body and the second wheel body are close to each other in the front and back direction.

[0006] In some embodiments, the first wheel frame is rotatably connected to the support frame about a first axis, and the second wheel frame is rotatably connected to the support frame about a second axis. When the vehicle is in the unfolded state, in the front-rear direction, the distance between the first axle of the first wheel and the second axle of the second wheel is greater than the distance between the first axis and the second axis. When the vehicle is in the folded state, the distance between the first axle and the second axle is less than the distance between the first axis and the second axis.

[0007] In some embodiments, when the vehicle is in an unfolded state, the first wheel frame extends in the vertical direction, and the second wheel frame extends downward in the front-rear direction away from the second axis.

[0008] In some embodiments, the enclosure frame includes a first enclosure frame and a second enclosure frame movably connected, the support frame includes a first support frame and a second support frame movably connected, and the support assembly includes a first support assembly and a second support assembly respectively foldable in the vertical direction. The first support assembly is movably connected between the first enclosure frame and the first support frame, and the second support assembly is movably connected between the second enclosure frame and the second support frame. The first wheel frame is rotatably connected to the first support frame and movably connected to the first support component. The second wheel frame is rotatably connected to the second support frame and movably connected to the second support component. When the vehicle is in a folded state, the first frame, the second frame, the first support frame, and the second support frame are retracted together, and the first wheel frame and the second wheel frame are also close to each other.

[0009] In some embodiments, the first support component and the second support component are movably connected and can be retracted to each other. When the first support component and the second support component retract to each other, the first enclosure frame and the second enclosure frame retract to each other, and the first support frame and the second support frame retract to each other.

[0010] In some embodiments, in the unfolded state, the first support assembly includes a first support frame, a first upper connecting rod, and a first lower connecting rod. The first enclosure is rotatably connected to the upper part of the first support frame, the lower part of the first support frame is rotatably connected to the first wheel frame, the first lower connecting rod is rotatably connected between the first support frame and the first carrier frame, and the first upper connecting rod is rotatably connected between the first lower connecting rod and the first enclosure. And / or, in the unfolded state, the second support assembly includes a second support frame, a second upper connecting rod, and a second lower connecting rod. The second enclosure is rotatably connected to the upper part of the second support frame, the lower part of the second support frame is rotatably connected to the second wheel frame, the second lower connecting rod is rotatably connected between the second support frame and the second bearing frame, and the second upper connecting rod is rotatably connected between the second lower connecting rod and the second enclosure.

[0011] In some embodiments, the upper part of the first support frame is rotatably connected to the upper part of the second support frame about a first rotation center line, one end of the first enclosure is rotatably connected to the first support frame about a third axis, and one end of the second enclosure is rotatably connected to the second support frame about a fourth axis, wherein the third axis and the fourth axis extend parallel to or collinear with the first rotation center line.

[0012] In some embodiments, the first lower link and the first support frame intersect each other and are rotatably connected at the intersection, the lower part of the first lower link is rotatably connected to the first support frame about a fifth axis, and the first upper link is rotatably connected between the first enclosure and the upper part of the first lower link. The second lower connecting rod intersects with the second support frame and is rotatably connected at the intersection. The lower part of the second lower connecting rod is rotatably connected to the second bearing frame about the sixth axis. The second upper connecting rod is rotatably connected between the second enclosure and the upper part of the second lower connecting rod. The first support frame and the second support frame are rotatably connected around the second rotation center line, and the fifth axis and the sixth axis extend parallel to or collinear with the second rotation center line.

[0013] In some embodiments, the vehicle is in a folded state, with the first support frame and the second support frame folded together between the first enclosure and the second enclosure, and the first wheel and the second wheel distributed along the length direction of the first support frame and the second support frame.

[0014] In some embodiments, the vehicle is in a folded state, with the second wheel frame and the first wheel frame close together, and the first wheel frame, the first wheel body, and the second wheel body arranged sequentially along the length direction of the first support frame or the second support frame.

[0015] In some embodiments, the first wheel assembly and the second wheel assembly each have two sets disposed on the left and right sides, and the load-bearing frame is located between the two sets of the first wheel body and the two sets of the second wheel body in the left-right direction.

[0016] In some embodiments, the vehicle is in a folded state, the load-bearing frame has a folded thickness along the thickness direction, the diameter of the first wheel and / or the second wheel is not greater than the folded thickness, and the first wheel and / or the second wheel does not protrude beyond the load-bearing frame in the thickness direction.

[0017] In some embodiments, when the vehicle is in a folded state, and the first support frame and the second support frame extend in the vertical direction respectively, the first wheel frame, the second enclosure frame and / or the second support frame together support the ground to form the self-supporting structure of the vehicle.

[0018] Another technical solution adopted by the present invention is: a carrier having an unfolded state and a folded state, the carrier comprising: The load-bearing frame includes a load-bearing bracket; The wheel assembly includes a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The first wheel assembly includes a first wheel frame and a first wheel body disposed on the first wheel frame. The second wheel assembly includes a second wheel frame and a second wheel body disposed on the second wheel frame. The first wheel frame and the second wheel frame are rotatably connected to the support frame. During the process of the vehicle transitioning from an unfolded state to a folded state, the first wheel frame and the second wheel frame rotate towards each other and retract with the support frame respectively.

[0019] In some embodiments, the carrier frame includes a first carrier frame and a second carrier frame that are movably connected, the first wheel frame is rotatably connected to the first carrier frame, the second wheel frame is rotatably connected to the second carrier frame, and when the vehicle is in a folded state, the first carrier frame and the second carrier frame are retracted together, and the first wheel frame and the second wheel frame are brought closer together.

[0020] In some embodiments, the length of the first wheel frame is less than the length of the second wheel frame, and the vehicle is in a folded state, wherein the first wheel frame, the first wheel body, and the second wheel body are arranged sequentially along the length direction of the first support frame or the second support frame; and / or, the vehicle is in a folded state, the support frame has a folded length, and the length formed by the first wheel frame, the first wheel body, and the second wheel body is not greater than the folded length.

[0021] In some embodiments, the supporting frame further includes a surrounding frame disposed above the surrounding frame, and a support assembly connecting the surrounding frame and the support frame. The surrounding frame includes a first surrounding frame and a second surrounding frame movably connected, and the support assembly includes a first support assembly and a second support assembly respectively foldable in a vertical direction. The first support assembly is movably connected between the first surrounding frame and the first support frame, and the second support assembly is movably connected between the second surrounding frame and the second support frame. The first wheel frame is movably connected to the first support component, and the second wheel frame is movably connected to the second support component. During the process of the vehicle changing from an unfolded state to a folded state, the first support component and the second support component fold in the vertical direction, and drive the first wheel frame and the second wheel frame to rotate in opposite directions and retract with the support frame respectively.

[0022] In some embodiments, the first support component and the second support component are movably connected and can be retracted to each other. When the first support component and the second support component retract to each other, the first enclosure frame and the second enclosure frame retract to each other, and the first support frame and the second support frame retract to each other.

[0023] Due to the application of the above technical solution, the present invention has the following advantages: In the process of folding the frame and the support frame in the vertical direction, the vehicle of the present invention can drive the first wheel frame of the first wheel assembly and the second wheel frame of the second wheel assembly to rotate towards each other and close relative to the support frame, so that the first wheel body and the second wheel body move closer to each other in the front-back direction. The operation steps are reduced, the overall size of the vehicle after folding is reduced, and the structure of the folded vehicle is also flatter. Attached Figure Description

[0024] To more clearly illustrate the technical solution of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of a vehicle in its deployed state according to an embodiment of the present invention; Figure 2 for Figure 1 A three-dimensional structural diagram of the process of retracting the towing frame into the load-bearing frame in the vehicle; Figure 3 for Figure 2 Based on this, a three-dimensional structural diagram of the vehicle after the traction frame is incorporated into the load-bearing frame is presented; Figure 4 for Figure 3 A schematic diagram showing the rotational connection relationships of various components in the vehicle; Figure 5 for Figure 3 A side view of the vehicle's structure; Figure 6 for Figure 5 A longitudinal section diagram; Figure 7 for Figure 3 A three-dimensional structural diagram of the vehicle during the folding process; Figure 8 for Figure 7 A side view of the vehicle's structure; Figure 9 for Figure 8 A longitudinal section diagram; Figure 10 for Figure 7 A schematic diagram of the three-dimensional structure of the vehicle after further folding; Figure 11 for Figure 10 A side view of the vehicle's structure; Figure 12 for Figure 11 A longitudinal section diagram; Figure 13 for Figure 10 A three-dimensional structural diagram of the vehicle after it has been converted to a folded state; Figure 14 for Figure 13 A side view of the vehicle's structure; Figure 15 for Figure 14 A longitudinal section diagram; In the attached diagrams above: 10. Load-bearing frame; 1. Enclosure frame; 11. First enclosure frame; 12. Second enclosure frame; 2. Support frame; 21. First support frame; 22. Second support frame; 3. First wheel assembly; 31. First wheel frame; 32. First wheel body; 33. First crossbar; 34. First wheel axle; 4. Second wheel assembly; 41. Second wheel frame; 42. Second wheel body; 43. Second crossbar; 44. Second wheel axle; 5. First support assembly; 51. First support frame; 52. First lower connecting rod; 53. Second upper connecting rod; 6. Second support assembly; 61. Second support frame; 62. Second lower connecting rod; 63. Second upper connecting rod; 7. Traction frame; 71. Lower pull rod; 72. Upper pull rod; 73. Pull rod seat. Detailed Implementation

[0026] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0027] In this article, the terms "up," "down," "left," "right," "front," and "rear," indicating directions or positional relationships, are defined with reference to the direction observed by the user when pulling the vehicle from the front while it is in its deployed state. See [link to relevant documentation] for details. Figure 1 The symbols used are illustrative and are intended only to facilitate the description of this application and to simplify the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] See Figures 1 to 15 The vehicle shown has an unfolded state and a folded state. The vehicle includes a support frame 10 and a wheel assembly. The wheel assembly includes a first wheel assembly 3 and a second wheel assembly 4. The first wheel assembly 3 and the second wheel assembly 4 are respectively disposed at the bottom of the support frame 10. In the unfolded state, the first wheel assembly 3 is located at the bottom front of the support frame 10, and the second wheel assembly 4 is located at the bottom rear of the support frame 10, forming a support for the bottom of the support frame 10.

[0029] The load-bearing frame 10 specifically includes a surrounding frame 1, a load-bearing frame 2 disposed below the surrounding frame 1, and a support component connecting the surrounding frame 1 and the load-bearing frame 2. The support component can be folded up and down. When the vehicle is in the unfolded state, the support component unfolds up and down and supports between the surrounding frame 1 and the load-bearing frame 2. The surrounding frame 1, the load-bearing frame 2 and the support component cooperate to form a load-bearing space, which can be used to carry items or for children to sit on. When the vehicle is folded, the support component folds up and down, so that the surrounding frame 1 and the load-bearing frame 2 can be closed up and down, thereby making the load-bearing frame 10 fold up and down.

[0030] The first wheel assembly 3 and the second wheel assembly 4 are respectively connected to the support frame 2. Specifically, the first wheel assembly 3 includes a first wheel frame 31 and a first wheel body 32 disposed on the first wheel frame 31. The first wheel body 32 is rotatably disposed at the bottom of the first wheel frame 31 around a first wheel axle 34. The second wheel assembly 4 includes a second wheel frame 41 and a second wheel body 42 disposed on the second wheel frame 41. The second wheel body 42 is rotatably disposed at the bottom of the second wheel frame 41 around a second wheel axle 44. The first wheel frame 31 and the second wheel frame 41 are rotatably connected to the support frame 2 so that they can rotate relative to the support frame 2 and retract relative to the support frame 2 in the vertical direction.

[0031] In this vehicle, the first wheel frame 31 and the second wheel frame 41 are movably connected to the aforementioned support assembly, so that during the folding of the support assembly in the vertical direction, the first wheel frame 31 and the second wheel frame 41 rotate towards each other and respectively retract with the carrier frame 2. When the vehicle is in the folded state, the support assembly folds between the frame 1 and the carrier frame 2, the first wheel frame 31 and the second wheel frame 41 retract relative to the carrier frame 2, and the first wheel body 32 and the second wheel body 42 move towards each other in the front-back direction during the folding process. Thus, during the folding of the carrier frame 10, the first wheel assembly 3 and the second wheel assembly 4 can simultaneously rotate and fold relative to the carrier frame 10 without additional operation, reducing the overall size of the folded vehicle and making the structure of the folded vehicle flatter.

[0032] Referring to the accompanying drawings, the first wheel frame 31 is rotatably connected to the support frame 2 about a first axis X1, and the second wheel frame 41 is rotatably connected to the support frame 2 about a second axis X2. The vehicle is in its deployed state, as shown below. Figure 5 , Figure 6 As shown, the distance between the first wheel axle 34 and the second wheel axle 44 in the front-to-back direction is greater than the distance between the first axis centerline X1 and the second axis centerline X2; when the vehicle is in a folded state, the distance between the first wheel axle 34 and the second wheel axle 44 in the front-to-back direction is less than the distance between the first axis centerline X1 and the second axis centerline X2, and the distance between the first wheel body 32 and the second wheel body 42 in the front-to-back direction is greatly reduced.

[0033] Specifically, when the vehicle is in the unfolded state, the first wheel frame 31 extends vertically, and the second wheel frame 41 is inclined downward in the front-back direction away from the second axis X2. This makes the distance between the first wheel 32 and the second wheel 42 relatively larger when the vehicle is unfolded, so that it can be stably supported on the ground. When the vehicle is folded, the second wheel frame 41 flips towards the first wheel frame 31, which greatly reduces the distance between the second wheel 42 and the first wheel 32.

[0034] In this embodiment, the first wheel assembly 3 is a universal wheel assembly, the first wheel frame 31 extends generally in the vertical direction, and the first wheel frame 31 includes an upper frame 31a and a lower frame 31b that are rotatably connected around a universal shaft extending in the vertical direction. The upper frame 31a is rotatably connected to the support frame 2 around the first axis X1, and the first wheel body 32 is rotatably connected to the bottom of the lower frame body 31b around the first wheel shaft 34. The second wheel assembly 4 is a directional wheel, the second wheel frame 41 is a rigid rod, and the second wheel body 42 is rotatably mounted on the bottom of the second wheel frame 41 around the second wheel shaft 44.

[0035] Referring to the accompanying drawings, in this embodiment, the enclosure frame 1 includes a first enclosure frame 11 and a second enclosure frame 12 that are movably connected; the support frame 2 includes a first support frame 21 and a second support frame 22 that are movably connected; the support components include a first support component 5 and a second support component 6, each of which can be folded up and down in the vertical direction. The first support component 5 is movably connected between the first enclosure frame 11 and the first support frame 21, and the second support component 6 is movably connected between the second enclosure frame 12 and the second support frame 22.

[0036] The first wheel frame 31 is rotatably connected to the first support frame 21 and movably connected to the first support assembly 5, and the second wheel frame 41 is rotatably connected to the second support frame 22 and movably connected to the second support assembly 6. When the vehicle is in the unfolded state, the first frame 11 and the second frame 12 unfold towards each other in the front-to-back direction, the first support frame 21 and the second support frame 22 unfold towards each other in the front-to-back direction, the first support component 5 supports the first frame 11 and the first support frame 21 in the vertical direction, and the second support component 6 supports the second frame 12 and the second support frame 22 in the vertical direction. When the vehicle is folded, the first support component 5 folds down between the first frame 11 and the first support frame 21 in the vertical direction, the second support component 6 folds down between the second frame 12 and the second support frame 22 in the vertical direction, and the first frame 11 and the second frame 12 fold down towards each other in the front-to-back direction, and the first support frame 21 and the second support frame 22 fold down towards each other in the front-to-back direction, so that the first wheel frame 31 and the second wheel frame 41 also fold down towards each other. This further reduces the size of the vehicle after folding, and the size of the folded vehicle in the front-to-back direction is reduced to about half of that in the unfolded state.

[0037] In this embodiment, the first support component 5 and the second support component 6 are arranged to retract into each other, and the first support component 5 and the second support component 6 are configured to drive the first frame 11 and the second frame 12 to retract into each other when they retract into each other, and to drive the first support frame 21 and the second support frame 22 to retract into each other, thereby realizing the folding of the support frame 10 in the front-back direction.

[0038] Referring to the accompanying drawings, in this embodiment, in the unfolded state, the first support assembly 5 includes a first support frame 51, a first upper connecting rod 53, and a first lower connecting rod 52. One end of the first enclosure 11 is rotatably connected to the upper part of the first support frame 51, the lower part of the first support frame 51 is rotatably connected to the first wheel frame 31, the first lower connecting rod 52 is rotatably connected between the first support frame 51 and the first carrier frame 21, and the first upper connecting rod 53 is rotatably connected between the first lower connecting rod 52 and the first enclosure 11. The second support assembly 6 includes a second support frame 61, a second upper connecting rod 63, and a second lower connecting rod 62. The second enclosure 12 is rotatably connected to the upper part of the second support frame 61, the lower part of the second support frame 61 is rotatably connected to the second wheel frame 41, the second lower connecting rod 62 is rotatably connected between the second support frame 61 and the second carrier frame 22, and the second upper connecting rod 63 is rotatably connected between the second lower connecting rod 62 and the second enclosure 12.

[0039] Specifically, see Figures 1 to 6 As shown, the various components in the vehicle of this embodiment are specifically arranged as follows: The first frame 11, the second frame 12, the first support frame 21 and the second support frame 22 are all U-shaped frames. The first support component 5 and the second support component 6 each have two sets located on the left and right sides, which are respectively connected to the side members on the corresponding sides of the first frame 11, the second frame 12, the first support frame 21 and the second support frame 22.

[0040] On both sides, the upper part of the first support frame 51 is rotatably connected to the upper part of the second support frame 61 around the first rotation center line M1, and the rear part of the first bearing frame 21 is rotatably connected to the front part of the second bearing frame 22 around the second rotation center line M2. The rear part of the first enclosure frame 11 is rotatably connected to the upper part of the first support frame 51 around the third axis X3, and the front part of the second enclosure frame 12 is rotatably connected to the upper part of the second support frame 61 around the fourth axis X4. The aforementioned third axis X3 and fourth axis X4 extend parallel to or collinear with the first rotation center line M1, respectively. Here, the third axis X3, the first rotation center line M1, and the fourth axis X4 are arranged parallel to each other and distributed sequentially in the front-back direction.

[0041] The lower part of the first support frame 51 is rotatably connected to the first wheel frame 31 around the seventh axis X7, which is parallel to the first axis X1. The first lower link 52 intersects with the first support frame 51 and is rotatably connected at the intersection. The lower part of the first lower link 52 is rotatably connected to the first bearing frame 21 around the fifth axis X5. The upper part of the first lower link 52 is rotatably connected to the lower part of the first upper link 53. The upper part of the first upper link 53 is rotatably connected to the first enclosure 11. Thus, the first enclosure 11, the first upper link 53, the first lower link 52 and the first support frame 51 form a four-bar linkage. The first support frame 51, the first lower link 52, the first bearing frame 21 and the first wheel frame 31 form another four-bar linkage.

[0042] Similarly, the lower part of the second support frame 61 is rotatably connected to the upper part of the second wheel frame 41 about the eighth axis X8, which is located above the second axis X2; the second lower link 62 and the second support frame 61 intersect each other and are rotatably connected at the intersection; the lower part of the second lower link 62 is rotatably connected to the second bearing frame 22 about the sixth axis X6; the upper part of the second lower link 62 is rotatably connected to the lower part of the second upper link 63; and the upper part of the second upper link 63 is rotatably connected to the second enclosure 12. Thus, the second enclosure 12, the second upper link 63, the second lower link 62 and the second support frame 61 form a four-bar linkage, and the second support frame 61, the second lower link 62, the second bearing frame 22 and the second wheel frame 41 form another four-bar linkage.

[0043] The aforementioned fifth axis X5 and sixth axis X6 extend parallel to or collinear with the second rotation center line M2. Here, the aforementioned fifth axis X5, second rotation center line M2, and sixth axis X6 are arranged parallel to each other and distributed sequentially in the front-back direction.

[0044] In this embodiment, the vehicle has two sets of first wheel assembly 3 and second wheel assembly 4, each located on the left and right sides. The bearing frame 10 is positioned between the two sets of first wheel bodies 32 and the two sets of second wheel bodies 42 in the left-right direction. A first crossbar 33 is fixedly connected between the two sets of first wheel frames 31. The first crossbar 33 extends in the left-right direction, and the two sets of first wheel frames 31 are rotatably connected to the first bearing frame 21 through the first crossbar 33. The axis of the first crossbar 33 forms the first axis X1. When the vehicle is in the unfolded state, the first crossbar 33 is specifically located in front of the first wheel frames 31 and below the first bearing frame 21. A second crossbar 43 is fixedly connected between the lower parts of the two sets of second wheel frames 41. The axis of the second crossbar 43 can be collinear with or parallel to the axis of the second wheel axle 44. When the vehicle is in the unfolded state, the upper part of the second wheel frame 41 extends above the second support frame 22 and is rotatably connected to the second support frame 61. The second support frame 61 and the second wheel frame 41 extend in the same length direction.

[0045] The vehicle in this embodiment also includes a tow frame 7, which is movably connected to the front of the support frame 10 for use by a user to pull and drive the vehicle. Here, the tow frame 7 is movably connected to the front of the support frame 2 and can be folded relative to the support frame 2. Specifically, the tow frame 7 includes a lower pull rod 71 and an upper pull rod 72 that are foldably connected along the length direction. Here, the lower pull rod 71 and the upper pull rod 72 are slidably and telescopically connected. The lower part of the lower pull rod 71 is rotatably connected to a pull rod seat 73, which is slidably mounted on the first support frame 21 of the support frame 2 in the front-rear direction. When the traction frame 7 is needed, the pull rod seat 73 slides to the front of the first support frame 21, and the lower pull rod 71 and the upper pull rod 72 extend relative to each other and can rotate relative to the pull rod seat 73; when the traction frame 7 is not needed, the lower pull rod 71 and the upper pull rod 72 are slidably shortened, and after they are converted to extend horizontally in the front-back direction, they are pushed backward together with the pull rod seat 73 so that they retract with the first support frame 21.

[0046] In this embodiment, the vehicle is in the deployed state. See [link / reference]. Figures 1 to 6 As shown, the first support frame 51 and the second support frame 61 rotate and open relative to each other. The first enclosure 11 and the second enclosure 12 cooperate with each other on the upper parts of the first support frame 51 and the upper parts of the second support frame 61 to form a circumferentially closed frame. The first bearing frame 21 and the second bearing frame 22 extend in the front-rear direction to jointly provide bearing support. The first wheel assembly 3 is located at the bottom front of the bearing frame 10, and the second wheel bodies 42 of the two sets of second wheel assemblies 4 are located at the bottom rear of the bearing frame 10.

[0047] When it is necessary to fold up the vehicle, such as Figures 7 to 12As shown, after the traction frame 7 is folded up, the operator drives the first frame 11 to flip downward relative to the first support frame 51, and drives the second frame 12 to flip downward relative to the second support frame 61. Thus, under the linkage of the rods of the first support assembly 5 and the rods of the second support assembly 6, the first frame 11 and the first support frame 21 retract towards each other in the vertical direction, and the second frame 12 and the second support frame 22 retract towards each other in the vertical direction. At the same time, the first wheel frame 31 is driven to flip backward, and the first wheel body 32 moves backward; and the second wheel frame 41 is driven to flip forward, and the second wheel body 42 moves forward, so that the height of the support frame 10 is reduced. At the same time, the first wheel frame 31 and the second wheel frame 41 retract relative to the support frame 2, and the first wheel body 32 and the second wheel body 42 move closer to each other in the front-back direction.

[0048] Furthermore, driving the first support frame 51 and the second support frame 61 to rotate and move closer together causes the first bearing frame 21 and the second bearing frame 22 to flip relative to each other and retract between the first support frame 51 and the second support frame 61. The first enclosure frame 11 and the second enclosure frame 12 are respectively located on the outside of the first support frame 51 and the second support frame 61, which further reduces the length of the bearing frame 10. At the same time, as Figures 13 to 15 As shown, the first wheel frame 31 and the second wheel frame 41 are close to each other, and the first wheel body 32 and the second wheel body 42 are also close to each other, and are distributed along the length direction of the first support frame 21 and the second support frame 22.

[0049] In this folded state, the load-bearing frame 10 has a folded thickness along its thickness direction. This folded thickness is approximately equal to the thickness of the first frame 11, the first support frame 51, the second support frame 61, and the second frame 12 when they are brought together. The other members are folded between these members, resulting in a very small thickness after folding, while the length is approximately equal to the length of the first support frame 51 or the second support frame 61. Here, the length of the second wheel frame 41 is greater than the length of the first wheel frame 31. In the folded state, after the first wheel frame 31 and the second wheel frame 41 are folded together, the first wheel frame 31, the first wheel body 32, and the second wheel body 42 are sequentially distributed along the length direction of the first load-bearing frame 21 and the second load-bearing frame 22. The length occupied by the first wheel frame 31, the first wheel body 32, and the second wheel body 42 in the front-to-back direction is not greater than the folded length formed by the load-bearing frame 10 after folding, and the lengths of the two are basically the same. In the folded state, when the first support frame 21 and the second support frame 22 are switched to extend in the vertical direction, the first wheel frame 31, the second enclosure frame 12 and / or the second support frame 22 are supported on the ground together, which can form the vehicle's self-standing in the folded state.

[0050] In specific configuration, the diameters of the first wheel 32 and the second wheel 42 are no greater than the aforementioned folding thickness. After folding, the first wheel 32 and the second wheel 42 do not protrude beyond the thickness of the support frame 10, resulting in a very flat and compact overall size for the folded vehicle. In actual configuration, the length, height, and width of the folded vehicle do not exceed 55cm, 40cm, and 20cm respectively, allowing it to be carried on board an aircraft after folding, bringing convenience to users' daily travel.

[0051] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. In the event of any contradiction or inconsistency between the definitions used herein and those contained in other published documents, the definitions used herein shall prevail.

[0053] It should also be noted that "rotational connection" in the above embodiments refers to pivot connection, unless the context clearly indicates other rotational connection methods.

[0054] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0055] It can be further understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0056] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A vehicle having an unfolded state and a folded state, characterized in that, The vehicle includes: A load-bearing frame, comprising a surrounding frame, a load-bearing frame disposed below the surrounding frame, and a support component connecting the surrounding frame and the load-bearing frame, the support component being foldable in the vertical direction; The wheel assembly includes a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The first wheel assembly includes a first wheel frame and a first wheel body disposed on the first wheel frame. The second wheel assembly includes a second wheel frame and a second wheel body disposed on the second wheel frame. The first wheel frame and the second wheel frame are rotatably connected to the support frame. The first wheel frame and the second wheel frame are respectively movably connected to the support assembly, so as to drive the first wheel frame and the second wheel frame to rotate in opposite directions and retract with the support frame during the process of the support assembly folding in the vertical direction.

2. The vehicle according to claim 1, characterized in that: When the vehicle is in the unfolded state, the support assembly unfolds in the vertical direction and is supported between the enclosure frame and the support frame. The enclosure frame, the support frame and the support assembly cooperate with each other to form a load-bearing space. When the vehicle is in a folded state, the support assembly is folded up and down between the enclosure frame and the support frame. The first wheel frame and the second wheel frame are respectively folded up and down relative to the support frame, and the first wheel body and the second wheel body are close to each other in the front and back direction.

3. The vehicle according to claim 1, characterized in that: The first wheel frame is rotatably connected to the support frame about a first axis, and the second wheel frame is rotatably connected to the support frame about a second axis. When the vehicle is in the unfolded state, in the front-rear direction, the distance between the first axle of the first wheel and the second axle of the second wheel is greater than the distance between the first axis and the second axis. When the vehicle is in the folded state, the distance between the first axle and the second axle is less than the distance between the first axis and the second axis.

4. The vehicle according to claim 3, characterized in that: When the vehicle is in the unfolded state, the first wheel frame extends in the vertical direction, and the second wheel frame extends downward in the front-back direction away from the second axis.

5. The vehicle according to any one of claims 1 to 4, characterized in that: The enclosure frame includes a first enclosure frame and a second enclosure frame that are movably connected. The support frame includes a first support frame and a second support frame that are movably connected. The support assembly includes a first support assembly and a second support assembly that are respectively foldable in the vertical direction. The first support assembly is movably connected between the first enclosure frame and the first support frame, and the second support assembly is movably connected between the second enclosure frame and the second support frame. The first wheel frame is rotatably connected to the first support frame and movably connected to the first support component. The second wheel frame is rotatably connected to the second support frame and movably connected to the second support component. When the vehicle is in a folded state, the first frame, the second frame, the first support frame, and the second support frame are retracted together, and the first wheel frame and the second wheel frame are also close to each other.

6. The vehicle according to claim 5, characterized in that: The first support component and the second support component are movably connected and can be retracted to each other. When the first support component and the second support component retract to each other, the first enclosure frame and the second enclosure frame retract to each other, and the first support frame and the second support frame retract to each other.

7. The vehicle according to claim 5, characterized in that: In the unfolded state, the first support assembly includes a first support frame, a first upper connecting rod, and a first lower connecting rod. The first enclosure is rotatably connected to the upper part of the first support frame, the lower part of the first support frame is rotatably connected to the first wheel frame, the first lower connecting rod is rotatably connected between the first support frame and the first bearing frame, and the first upper connecting rod is rotatably connected between the first lower connecting rod and the first enclosure. And / or, in the unfolded state, the second support assembly includes a second support frame, a second upper connecting rod, and a second lower connecting rod. The second enclosure is rotatably connected to the upper part of the second support frame, the lower part of the second support frame is rotatably connected to the second wheel frame, the second lower connecting rod is rotatably connected between the second support frame and the second bearing frame, and the second upper connecting rod is rotatably connected between the second lower connecting rod and the second enclosure.

8. The vehicle according to claim 7, characterized in that: The upper part of the first support frame is rotatably connected to the upper part of the second support frame around the first rotation center line, one end of the first frame is rotatably connected to the first support frame around the third axis, and one end of the second frame is rotatably connected to the second support frame around the fourth axis. The third axis and the fourth axis extend parallel to or collinear with the first rotation center line.

9. The vehicle according to claim 7, characterized in that: The first lower connecting rod intersects with the first support frame and is rotatably connected at the intersection. The lower part of the first lower connecting rod is rotatably connected to the first bearing frame about the fifth axis. The first upper connecting rod is rotatably connected between the first enclosure and the upper part of the first lower connecting rod. The second lower connecting rod intersects with the second support frame and is rotatably connected at the intersection. The lower part of the second lower connecting rod is rotatably connected to the second bearing frame about the sixth axis. The second upper connecting rod is rotatably connected between the second enclosure and the upper part of the second lower connecting rod. The first support frame and the second support frame are rotatably connected around the second rotation center line, and the fifth axis and the sixth axis extend parallel to or collinear with the second rotation center line.

10. The vehicle according to claim 5, characterized in that: When the vehicle is in a folded state, the first support frame and the second support frame are folded together between the first frame and the second frame, and the first wheel and the second wheel are distributed along the length direction of the first support frame and the second support frame.

11. The vehicle according to claim 5, characterized in that: When the vehicle is in a folded state, the second wheel frame and the first wheel frame are close together, and the first wheel frame, the first wheel body and the second wheel body are arranged sequentially along the length direction of the first support frame or the second support frame.

12. The vehicle according to claim 5, characterized in that: Both the first wheel assembly and the second wheel assembly have two sets respectively disposed on the left and right sides, and the supporting frame is located between the two sets of the first wheel body and the two sets of the second wheel body in the left-right direction; and / or, The vehicle is in a folded state, the load-bearing frame has a folded thickness along the thickness direction, the diameter of the first wheel and / or the second wheel is not greater than the folded thickness, and the first wheel and / or the second wheel do not protrude outside the load-bearing frame in the thickness direction of the load-bearing frame; And / or, when the vehicle is in a folded state, and the first support frame and the second support frame extend in the vertical direction respectively, the first wheel frame and the second enclosure and / or the second support frame together support the ground to form the self-supporting structure of the vehicle.

13. A vehicle having an unfolded state and a folded state, characterized in that, The vehicle includes: The load-bearing frame includes a load-bearing bracket; The wheel assembly includes a first wheel assembly and a second wheel assembly respectively disposed at the bottom of the support frame. The first wheel assembly includes a first wheel frame and a first wheel body disposed on the first wheel frame. The second wheel assembly includes a second wheel frame and a second wheel body disposed on the second wheel frame. The first wheel frame and the second wheel frame are rotatably connected to the support frame. During the process of the vehicle transitioning from an unfolded state to a folded state, the first wheel frame and the second wheel frame rotate towards each other and retract with the support frame respectively.

14. The vehicle according to claim 13, characterized in that: The carrier frame includes a first carrier frame and a second carrier frame that are movably connected. The first wheel frame is rotatably connected to the first carrier frame, and the second wheel frame is rotatably connected to the second carrier frame. When the vehicle is in a folded state, the first carrier frame and the second carrier frame are folded together, and the first wheel frame and the second wheel frame are close together.

15. The vehicle according to claim 14, characterized in that: The length of the first wheel frame is less than the length of the second wheel frame. When the vehicle is in a folded state, the first wheel frame, the first wheel body, and the second wheel body are arranged sequentially along the length direction of the first support frame or the second support frame; and / or, when the vehicle is in a folded state, the support frame has a folded length, and the length formed by the first wheel frame, the first wheel body, and the second wheel body is not greater than the folded length.

16. The vehicle according to claim 14 or 15, characterized in that: The load-bearing frame further includes an enclosure frame disposed above the enclosure frame, and a support assembly connecting the enclosure frame and the load-bearing frame. The enclosure frame includes a first enclosure frame and a second enclosure frame movably connected. The support assembly includes a first support assembly and a second support assembly capable of folding in the vertical direction. The first support assembly is movably connected between the first enclosure frame and the first load-bearing frame, and the second support assembly is movably connected between the second enclosure frame and the second load-bearing frame. The first wheel frame is movably connected to the first support component, and the second wheel frame is movably connected to the second support component. During the process of the vehicle changing from an unfolded state to a folded state, the first support component and the second support component fold in the vertical direction, and drive the first wheel frame and the second wheel frame to rotate in opposite directions and retract with the support frame respectively.

17. The vehicle according to claim 16, characterized in that: The first support component and the second support component are movably connected and can be retracted to each other. When the first support component and the second support component retract to each other, the first enclosure frame and the second enclosure frame retract to each other, and the first support frame and the second support frame retract to each other.

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