vehicle

Abstract

The present application relates to a kind of carrier, including collapsible carrier frame, and the multiple groups of wheel assemblies arranged in the bottom of the carrier frame, the wheel assembly includes wheel frame, wheel body is rotatably connected on the wheel frame around wheel shaft, the wheel frame is rotatably connected to the carrier frame around the rotation center line extending in front-back direction, when the carrier is in unfolded state, the carrier frame is unfolded, all the wheel assemblies are supported on the bottom of the carrier frame;When the carrier is in folded state, the carrier frame is folded, all the wheel assemblies are respectively with the carrier frame each other, the carrier also includes the linkage assembly arranged between the carrier frame and the wheel frame, to drive the wheel assembly rotates around the rotation center line in the process of the carrier frame folding, so that each wheel assembly and carrier frame each other, thereby greatly reducing the size of the carrier in folded state, so that the structure of carrier in folded state is more flat, compact.

Description

Technical Field

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

[0002] Vehicles equipped with wheels, such as strollers and trailers, offer convenience for people to carry children, pets, or other items during daily outings. These vehicles are typically designed to be foldable, but when folded, only the frame itself folds down, while the wheels remain at the bottom of the frame, taking up considerable space. This results in a still relatively large vehicle even when folded, making it inconvenient for daily carrying and storage. 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 as follows: a carrier having an unfolded state and a folded state, the carrier including a foldable carrier frame and multiple sets of wheel assemblies disposed at the bottom of the carrier frame, each wheel assembly including a wheel frame and a wheel body rotatably connected to the wheel frame around a wheel axle, the wheel frame being rotatably connected to the carrier frame around a rotation center line extending in the front-rear direction; when the carrier is in the unfolded state, the carrier frame unfolds, and all the wheel assemblies are supported at the bottom of the carrier frame; when the carrier is in the folded state, the carrier frame folds, and all the wheel assemblies are respectively folded together with the carrier frame; the carrier also includes a linkage assembly disposed between the carrier frame and the wheel frame, so as to drive the wheel assemblies to rotate around the rotation center line during the folding process of the carrier frame.

[0005] In some embodiments, the vehicle frame includes at least a base frame and a connecting rod rotatably connected to the base frame. When the vehicle frame is folded, the connecting rod retracts relative to the base frame. The wheel frame is rotatably connected to the base frame about the rotation center line. The linkage assembly includes a linkage rod, which is movably connected between the wheel frame and the connecting rod.

[0006] In some embodiments, a rotating shaft is fixedly provided on the wheel frame, the axis of the rotating shaft constitutes the rotation center line, the rotating shaft is rotatably provided on the base frame around its own axis line, and a first groove is provided on the outer periphery of the rotating shaft, the first groove extending spirally around the rotation center line; The linkage rod has a first end and a second end. The first end is rotatably connected to the connecting rod, and the second end is provided with a driving member. The driving member is slidably connected to the base frame in the front-back direction, and the driving member is slidably inserted into the first slot.

[0007] In some embodiments, the base frame has a base rod extending in a front-rear direction, the rotating shaft is rotatably inserted into a cavity in the base rod about its own axis, and the base rod has a second groove extending in a front-rear direction. In one configuration, the driving member is rotatably disposed at the second end and is slidably inserted into the second groove and the first groove; or, the driving member is fixedly disposed at the second end and is both rotatable and slidable in the second groove and the first groove.

[0008] In some embodiments, the driving element is a pin that extends in a left-right direction, with one end of the pin disposed on the linkage rod and the other end inserted into the first groove.

[0009] In some embodiments, the linkage includes a first segment and a second segment connected along the length direction. When the vehicle is in the deployed state, the first segment is parallel to the extension direction of the connecting rod, and the second segment is parallel to the extension direction of the base frame.

[0010] In some embodiments, the chassis includes a front chassis and a rear chassis, the rear of the front chassis being connected to the front of the rear chassis. The wheel assembly includes a first wheel assembly located at the front of the front chassis and a second wheel assembly located at the rear of the rear chassis. There are two sets of linkages: a front linkage and a rear linkage. The front linkage is rotatably connected to the front chassis, and the rear linkage is rotatably connected to the rear chassis. When the vehicle is in a folded state, the front linkage and the front chassis are retracted together, and the rear linkage and the rear chassis are retracted together. The linkage rods are respectively provided between the front link and the first wheel assembly, and between the rear link and the second wheel assembly.

[0011] In some embodiments, the first wheel assembly is provided on both the left and right sides of the front of the front chassis. During the process of the vehicle changing from an unfolded state to a folded state, the two sets of first wheel assemblies flip towards each other and retract to the bottom of the front chassis. And / or, the second wheel assembly is provided on both the left and right sides of the rear of the rear base frame. During the process of the vehicle changing from the unfolded state to the folded state, the two sets of second wheel assemblies flip towards each other and retract to the bottom of the rear base frame.

[0012] In some embodiments, the rear portion of the front chassis is rotatably connected to the front portion of the rear chassis, the upper portion of the front link is rotatably connected to the upper portion of the rear link, the vehicle is in a folded state, the front chassis and the rear chassis are retracted between the front link and the rear link, and the first wheel body of the first wheel assembly and the second wheel body of the second wheel assembly are close to each other.

[0013] In some embodiments, the rear part of the front underframe is rotatably connected to the front part of the rear underframe. The vehicle frame also includes a front frame, a rear frame, a front support rod, and a rear support rod. The rear part of the front frame, the front part of the rear frame, the upper part of the front connecting rod, and the upper part of the rear connecting rod are rotatably connected. The front support rod is rotatably connected between the front frame and the front underframe. The rear support rod is rotatably connected between the rear frame and the rear underframe. When the vehicle is in the unfolded state, a load-bearing space is formed between the front frame, the rear frame, and the underframe. When the vehicle is in the folded state, the front frame, the front support rod, the front connecting rod, the front underframe, the rear underframe, the rear connecting rod, the rear support rod, and the rear frame are folded together.

[0014] In some embodiments, the vehicle further includes a push rod frame, the lower part of which is rotatably connected to the rear part of the front frame, the front part of the rear frame, the upper part of the front link, and the upper part of the rear link via a rotating joint. The rotating joint is provided with a push rod locking member for locking the push rod frame, and a vehicle locking member for locking the front frame, the rear frame, the front link, and the rear link together. The vehicle locking member is unlocked when the push rod frame is retracted relative to the vehicle frame.

[0015] Due to the application of the above technical solutions, the present invention has the following advantages: The carrier provided in the embodiments of the present invention can link each wheel assembly to rotate around the rotation center line during the folding process, so that each wheel assembly and the carrier frame can be folded together, thereby greatly reducing the size of the carrier in the folded state, making the structure of the carrier in the folded state flatter and more compact. Attached Figure Description

[0016] 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.

[0017] 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 side view of the vehicle's structure; Figure 3 for Figure 1 Based on this, a three-dimensional structural diagram of the push rod frame in its towing state is shown; Figure 4 for Figure 3 A side view of the vehicle's structure; Figure 5 for Figure 1 A schematic diagram of the connection structure between the front chassis, the first wheel assembly, and the front linkage rod in the vehicle; Figure 6 for Figure 1 A three-dimensional structural diagram of the vehicle in the folding process; Figure 7 for Figure 6 A side view of the vehicle's structure; Figure 8 for Figure 1 A three-dimensional structural diagram of the vehicle in a folded state; Figure 9 for Figure 8 A side view of the vehicle's structure; In the attached diagrams above: 1. Base frame; 11. Front base frame; 111. Front bottom rod; 112. Front crossbar; 11a. Second slot; 11b. Third slot; 12. Rear base frame; 2. Enclosure frame; 21. Front enclosure frame; 21a. Front connector; 21b. Front support rod; 22. Rear enclosure frame; 22a. Rear connector; 22b. Rear support rod; 31. Front link; 32. Rear link; 41. Front strut; 42. Rear strut; 51. Front linkage rod; 511. First linkage segment; 512. Second linkage segment; 513. Drive component; 52. Rear linkage rod; 6. Push rod holder; 61. Lower push rod; 62. Upper push rod; 63. Unlocking mechanism; 7. First wheel assembly; 71. First wheel frame; 711. Upper connector; 712. Wheel frame body; 72. First wheel body; 73. Rotating shaft; 731. Fixed connection section; 732. Adapter section; 733. First groove; 8. Second wheel assembly; 81. Second wheel frame; 82. Second wheel body; 9. Locking joints; 10. Vehicle frame. Detailed Implementation

[0018] 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.

[0019] In this document, the terms "up," "down," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship as defined by the direction observed by the operator when pushing the vehicle in its deployed state, based on this embodiment. For specific orientations, see [link to relevant documentation]. Figure 2 , Figure 3 The illustrative markings are for the purpose of facilitating and simplifying the description of this application, and 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 limiting this application.

[0020] See Figures 1 to 9 The vehicle shown has an unfolded state and a folded state. The vehicle includes a foldable vehicle frame 10 and multiple wheel assemblies disposed at the bottom of the vehicle frame 10. Each wheel assembly includes a wheel frame and a wheel body rotatably connected to the wheel frame about a wheel axle. The wheel frame is rotatably connected to the vehicle frame 10 about a rotation center line X0 extending in the front-rear direction. When the vehicle is in the unfolded state, the vehicle frame 10 is unfolded, and all wheel assemblies are supported at the bottom of the vehicle frame 10, with the wheel axles of each wheel assembly extending horizontally. When the vehicle is in the folded state, the vehicle frame 10 is folded, and all wheel assemblies are retracted to the vehicle frame 10, wherein the wheel axles of each wheel assembly change their extension direction, causing the wheel body to retract to the vehicle frame 10.

[0021] The vehicle also includes a linkage component between the vehicle frame 10 and the wheel frame of each wheel assembly, so that during the folding process of the vehicle frame 10, the wheel assembly is driven to rotate around the rotation center line X0, so that the wheel assembly and the vehicle frame 10 are retracted to each other, thereby reducing the size of the vehicle in the folded state and making the structure of the vehicle in the folded state flatter and more compact.

[0022] Referring to the accompanying drawings, in this embodiment, the vehicle frame 10 includes at least a base frame 1 and a connecting rod rotatably connected to the base frame 1. When the vehicle frame 10 is folded, the connecting rod rotates and retracts relative to the base frame 1. The wheel frame of the wheel assembly is rotatably connected to the base frame 1 about the rotation center line X0. The linkage assembly includes a linkage rod, which is movably connected between the wheel frame and the connecting rod. When the connecting rod rotates relative to the base frame 1, the linkage rod is driven, thereby driving the wheel frame to rotate relative to the base frame 1 about the rotation center line X0.

[0023] Specifically, in the vehicle of this embodiment, the chassis 1 includes a front chassis 11 and a rear chassis 12. The rear part of the front chassis 11 is connected to the front part of the rear chassis 12. The multiple wheel assemblies include a first wheel assembly 7 disposed at the front part of the front chassis 11 and a second wheel assembly 8 disposed at the rear part of the rear chassis 12.

[0024] There are two sets of linkages: a front linkage 31 rotatably connected to the front base frame 11, and a rear linkage 32 rotatably connected to the rear base frame 12. When the vehicle frame 10 is folded, the front linkage 31 retracts relative to the front base frame 11, and the rear linkage 32 retracts relative to the rear base frame 12. Correspondingly, a front linkage 51 is provided between the front linkage 31 and the first wheel assembly 7, and a rear linkage 52 is provided between the rear linkage 32 and the second wheel assembly 8. Thus, when the vehicle frame 10 is folded, the front linkage 31 rotates and retracts relative to the front base frame 11, driving the first wheel assembly 7 to rotate and retract relative to the front base frame 11 via the front linkage 51; similarly, the rear linkage 32 rotates and retracts relative to the rear base frame 12, driving the second wheel assembly 8 to rotate and retract relative to the rear base frame 12 via the rear linkage 52.

[0025] In this embodiment, the front base frame 11 is provided with first wheel assemblies 7 on both the left and right sides of the front part, and the rear base frame 12 is provided with second wheel assemblies 8 on both the left and right sides of the rear part. During the process of the vehicle changing from the unfolded state to the folded state, the two sets of first wheel assemblies 7 flip towards each other and are gathered at the bottom of the front base frame 11, and the two sets of second wheel assemblies 8 flip towards each other and are gathered at the bottom of the rear base frame 12.

[0026] The following explanation uses component 7 from the first round as an example to illustrate its specific structure and working principle. (See also...) Figures 1 to 5 As shown, the first wheel assembly 7 is specifically a swivel wheel assembly. Its first wheel frame 71 includes an upper connector 711 and a wheel frame body 712 that are rotatably connected. The first wheel body 72 is rotatably connected to the wheel frame body 712 around a wheel axle. The upper connector 711 is L-shaped. When the wheel frame body 712 rotates relative to the upper connector 711 around a vertically extending swivel shaft, the first wheel assembly 7 achieves swivel orientation. A rotating shaft 73 is fixed on the upper connector 711. The rotating shaft 73 is rotatably connected to the front base frame 11 around the rotation center line X0. The first wheel assembly 7 also includes a rotating shaft 73, the axis of which forms the rotation center line X0. The rotating shaft 73 is fixedly connected to the upper connector 711.

[0027] Here, the rotating shaft 73 includes a fixed connecting section 731 and a transition fitting section 732 connected along the axial direction. The fixed connecting section 731 is used to be fixedly connected and fitted with the upper connector 711, specifically inserted into the rod cavity of the upper connector 711 and fixed to each other. The transition fitting section 732 is used to be rotatably connected with the front base frame 11 and to be fitted and connected with the front linkage rod 51.

[0028] The front chassis 11 includes two front bottom rods 111 located on the left and right sides and extending in the front-rear direction, and multiple front crossbars 112 connected between the two front bottom rods 111. Each front bottom rod 111 has a first wheel assembly 7 connected to its front end. Here, a transition fitting section 732 is rotatably inserted into the rod cavity of the front bottom rod 111, and a rotation limiting structure is provided between them. See details... Figure 5As shown, the front base rod 111 has an arc-shaped third groove 11b, and the rotating shaft 73 is provided with a limiting protrusion (not shown in the figure). The limiting protrusion is slidably inserted into the third groove 11b to limit the rotation angle range of the first wheel assembly 7 relative to the front base frame 11.

[0029] A first groove 733 is provided on the outer periphery of the rotating shaft 73, specifically on the outer periphery of the transition section 732. This first groove 733 extends spirally around the rotation center line X0. The front linkage rod 51 has a first end 51a and a second end 51b. The first end 51a is rotatably connected to the front connecting rod 31, and the second end 51b is provided with a driving member 513. The driving member 513 is slidably connected to the front base frame 11 in the front-rear direction and is slidably inserted into the first groove 733. Thus, when the front connecting rod 31 rotates and retracts relative to the front base frame 11, the front linkage rod 51 is driven, and the front linkage rod 51 rotates relative to the front connecting rod 31 and slides back and forth relative to the front base frame 11, retracting with the front base frame 11. At the same time, the driving member 513 slides in the first groove 733, causing the rotating shaft 73 to rotate around the rotation center line X0 relative to the front base frame 11, thereby causing the entire first wheel assembly 7 to flip and retract relative to the front base frame 11.

[0030] Here, the front linkage 81 is L-shaped, with a first segment 511 extending in the vertical direction and a second segment 512 extending in the front-rear direction. When the vehicle is in the deployed state, the extension direction of the first segment 511 is roughly parallel to the extension direction of the front connecting rod 31, and the extension direction of the second segment 512 is parallel to the extension direction of the front bottom rod 111. From the side, the front linkage 81 is obscured by the front connecting rod 31 and the front bottom rod 11, which makes the overall appearance of the vehicle relatively simple.

[0031] The front bottom rod 111 has a second groove 11a extending in the front-rear direction. The first groove 733 corresponds at least partially to the second groove 11a in the circumferential direction, so that the drive member 513 can be inserted into both simultaneously. The drive member 513 is specifically a pin, which extends in the left-right direction. One end of the pin is set on the second end 51b of the front linkage rod 51, and the other end passes through the second groove 11a and is inserted into the first groove 733. The drive member 513 can be rotatably set in the second end 51b and slidably inserted into the second groove 11a and the first groove 733; or the drive member 513 can be fixedly set in the second end 51b, in which case the drive member 513 can both rotate and slide relative to each other in the second groove 11a and the first groove 733.

[0032] In this embodiment, the second wheel assembly 8 is specifically a directional wheel assembly. The second wheel assembly 8 includes a second wheel frame 81 and a second wheel body 82 rotatably connected to the second wheel frame 81 around the wheel axle. The second wheel frame 81 is rotatably connected to the rear base frame 12 around the rotation center line X0. One end of the rear linkage rod 52 is rotatably connected to the rear connecting rod 32, and the other end is provided with a driving member that cooperates with the rotation shaft on the rear base frame 12 and the second wheel frame 81. Thus, when the rear connecting rod 32 rotates and retracts relative to the rear base frame 12, the second wheel assembly 8 is driven to flip and retract relative to the rear base frame 12 by the rear linkage rod 52.

[0033] Referring to the accompanying drawings, in this embodiment, the rear part of the front base frame 11 and the front part of the rear base frame 12 are rotatably connected in the vehicle frame 10, so that when the vehicle frame 10 is folded, the base frame 1 can be folded and retracted relative to each other in the front-rear direction. When the vehicle is folded, after the front base frame 11 and the rear base frame 12 rotate and retract relative to each other, the first wheel assembly 7 and the second wheel assembly 8 retract relative to each other and are retracted between the front base frame 11 and the rear base frame 12, and the first wheel body 72 and the second wheel body 82 fit together and retract, making the vehicle as a whole very flat.

[0034] In this embodiment, when the vehicle is in the unfolded state, the front connecting rod 31 and the rear connecting rod 32 extend vertically. The lower part of the front connecting rod 31 is rotatably connected to the front base frame 11, and the lower part of the rear connecting rod 32 is rotatably connected to the rear base frame 12. The upper parts of the front connecting rod 31 and the upper parts of the rear connecting rod 32 are rotatably connected at pivot point A. When the vehicle is folded, pivot point C, which connects the front base frame 11 and the rear base frame 12, moves upward toward pivot point A, allowing the front connecting rod 31, the front base frame 11, the rear base frame 12, and the rear connecting rod 32 to retract. At the same time, the front linkage rod 51 and the rear linkage rod 52 are also linked to cause the first wheel assembly 7 and the second wheel assembly 8 to flip and retract. Specifically, a rotation limiting structure is also provided between the rear part of the front base frame 11 and the front part of the rear base frame 12 to restrict the downward movement of the rotational connection position between the front base frame 11 and the rear base frame 12, thereby allowing the base frame 1 to remain in the open state and have good load-bearing support capacity.

[0035] Referring to the accompanying drawings, in this embodiment, the vehicle frame 10 further includes a surrounding frame 2, a front support rod 41, and a rear support rod 42. The surrounding frame 2 includes a front surrounding frame 21 and a rear surrounding frame 22, which are mutually enclosed to form a closed frame. The rear part of the front surrounding frame 21, the front part of the rear surrounding frame 22, the upper part of the front connecting rod 31, and the upper part of the rear connecting rod 32 are rotatably connected together. The front support rod 41 is rotatably connected between the front surrounding frame 21 and the front base frame 11. The rear support rod 42 is rotatably connected between the rear surrounding frame 22 and the rear base frame 12. When the vehicle is in the unfolded state, a load-bearing space is formed between the enclosure frame 2 and the base frame 1. The front support rod 41, the front connecting rod 31, the rear connecting rod 32, and the rear support rod 42 are supported in the vertical direction between the enclosure frame 2 and the base frame 1. When the vehicle is folded, the front enclosure frame 21, the front support rod 41, the front connecting rod 31, the front base frame 11, the rear base frame 12, the rear connecting rod 32, the rear support rod 42, and the rear enclosure frame 22 are retracted together.

[0036] Here, the front frame 21 includes a front connector 21a and a front rod 21b that are fixedly connected; the rear frame 22 includes a rear connector 22a and a rear rod 22b that are fixedly connected. Both the front rod 21b and the rear rod 22b are U-shaped rods. The front connector 21a and the rear connector 22a each have two sets located on the left and right sides. On the left and right sides of the vehicle, the rear part of the front connector 21a, the front part of the rear connector 22a, the upper part of the front connecting rod 31, and the upper part of the rear connecting rod 32 are rotatably connected to each other. The front support rod 41 is located on the front side of the front connecting rod 31. The upper part of the front support rod 41 is rotatably connected to the front part of the front connector 21a at a pivot point F, which is located in front of pivot point A. The lower part of the front support rod 41 is rotatably connected to the front base frame 11 at a pivot point E, which is located in front of pivot point B between the front connecting rod 31 and the front base frame 11. A, B, C, and D form a four-bar linkage. Similarly, the rear strut 42 is rotatably connected between the rear of the rear joint 22a and the rear base frame 12, and the rear strut 42 is located behind the rear link 32.

[0037] The vehicle also includes a push rod frame 6, which is foldable along its length. Specifically, it includes a lower push rod 61 and an upper push rod 62, which are slidably and telescopically connected. A locking structure is provided between them to lock the push rod frame 6 in the extended state. An unlocking operation member 63 is also provided on the upper part of the upper push rod 62. When the unlocking operation member 63 is operated, the above-mentioned locking structure can be unlocked.

[0038] The lower part of the lower push rod 61 is rotatably connected to the rear part of the front frame 21, the front part of the rear frame 22, the upper part of the front connecting rod 31, and the upper part of the rear connecting rod 32 via a rotating joint 9. The rotating joint 9 is equipped with a push rod locking member for locking the push rod frame 6, and a vehicle locking member for locking the front frame 21, rear frame 22, front connecting rod 31, and rear connecting rod 32 together. The unlocking operation member 63 can be used to unlock the push rod locking member. After the push rod locking member is unlocked, it can drive the push rod frame 6 to rotate back and forth relative to the vehicle frame 10, thereby changing the position of the push rod frame 6, so that the push rod frame 6 can operate as follows: Figure 1 , Figure 2 The indicated positive working position is used for forward propulsion, or Figure 3 , Figure 4 The reverse working position shown is used for reverse pushing or dragging. Here, after the push rod locking member is unlocked, the push rod frame is linked to the vehicle frame 10 when it is retracted, which causes the vehicle locking member to be unlocked. In this way, after the push rod frame 6 is unlocked and flipped and folded relative to the vehicle frame 10, the vehicle locking member is switched to the unlocked state. At this time, pulling the rotating connection position between the front base frame 11 and the rear base frame 12 can drive the vehicle frame 10 to fold, which in turn causes the first wheel assembly 7 and the second wheel assembly 8 to fold, realizing the conversion of the entire vehicle from the unfolded state to the folded state. The conversion operation is very simple and convenient.

[0039] In summary, the vehicle provided in this embodiment, in its deployed state, is as follows: Figures 1 to 4 As shown, viewed from the side, the front strut 41, front connecting rod 31, rear connecting rod 32, and rear strut 42 are supported vertically between the enclosure frame 2 and the base frame 1. The structure is simple, and the push rod frame 6 can... Figures 1 to 2 The vehicle is either pushed or towed between the forward and reverse working positions.

[0040] When the vehicle needs to be folded, first fold the push rod frame 6 relative to the vehicle frame 10. Then, pull upwards the rotating connection between the front base frame 11 and the rear base frame 12. This allows the front frame 21, front support rod 41, front connecting rod 31, front base frame 11, rear base frame 12, rear connecting rod 32, rear support rod 42, and rear frame 22 to rotate relative to each other and gradually fold together. Figure 6 , Figure 7 As shown, during this process, the first wheel assembly 7 and the second wheel assembly 8 rotate around the corresponding rotation center line X0 under the linkage action of the front linkage rod 51 and the rear linkage rod 52, respectively.

[0041] Finally, the front frame 21, front strut 41, front connecting rod 31, front base frame 11, rear base frame 12, rear connecting rod 32, rear strut 42, and rear frame 22 are all retracted together. The two sets of first wheel assemblies 7 are retracted into the front base frame 11, and the two sets of second wheel assemblies 8 are retracted into the rear base frame 12, with the first wheel body 72 and the second wheel body 82 abutting against each other. Figure 8 , Figure 9 As shown. The maximum length of the folded vehicle is only equivalent to the length of the front base frame 11 or the rear base frame 12, and the overall structure is very flat, which brings convenience to users for daily carrying and storage.

[0042] 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.

[0043] It should be noted that "rotational connection" in the above embodiments refers to pivot connection, unless the context clearly indicates other rotational connection methods.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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 foldable frame and multiple wheel assemblies disposed at the bottom of the frame. Each wheel assembly includes a wheel frame and wheels rotatably connected to the wheel frame about a wheel axle. The wheel frame is rotatably connected to the frame about a rotation center line extending in the front-rear direction. When the vehicle is in the unfolded state, the frame is unfolded, and all the wheel assemblies are supported at the bottom of the frame. When the vehicle is in the folded state, the frame is folded, and all the wheel assemblies are respectively folded into place with the frame. The vehicle also includes a linkage assembly disposed between the vehicle frame and the wheel frame, so as to drive the wheel assembly to rotate around the rotation center line during the folding of the vehicle frame.

2. The vehicle according to claim 1, characterized in that: The vehicle frame includes at least a base frame and a connecting rod rotatably connected to the base frame. When the vehicle frame is folded, the connecting rod retracts relative to the base frame. The wheel frame is rotatably connected to the base frame about the rotation center line. The linkage assembly includes a linkage rod, which is movably connected between the wheel frame and the connecting rod.

3. The vehicle according to claim 2, characterized in that: A rotating shaft is fixedly mounted on the wheel frame. The axis of the rotating shaft forms the rotation center line. The rotating shaft is rotatably mounted on the base frame around its own axis. A first groove is provided on the outer periphery of the rotating shaft. The first groove extends spirally around the rotation center line. The linkage rod has a first end and a second end. The first end is rotatably connected to the connecting rod, and the second end is provided with a driving member. The driving member is slidably connected to the base frame in the front-back direction, and the driving member is slidably inserted into the first slot.

4. The vehicle according to claim 3, characterized in that: The base frame has a base rod extending in the front-to-back direction, and the rotating shaft is rotatably inserted into the rod cavity of the base rod about its own axis. A second groove extending in the front-to-back direction is formed on the base rod. In one configuration, the driving member is rotatably disposed at the second end and is slidably inserted into the second groove and the first groove; or, the driving member is fixedly disposed at the second end and is both rotatable and slidable in the second groove and the first groove.

5. The vehicle according to claim 4, characterized in that: The driving component is a pin, which extends in the left-right direction. One end of the pin is disposed on the linkage rod and the other end is inserted into the first groove. And / or, the linkage includes a first segment and a second segment connected along the length direction, the vehicle being in the deployed state, the first segment being parallel to the extension direction of the connecting rod, and the second segment being parallel to the extension direction of the base frame.

6. The vehicle according to claim 2, characterized in that: The chassis includes a front chassis and a rear chassis, with the rear of the front chassis connected to the front of the rear chassis. The wheel assembly includes a first wheel assembly located at the front of the front chassis and a second wheel assembly located at the rear of the rear chassis. There are two sets of connecting rods: a front connecting rod and a rear connecting rod. The front connecting rod is rotatably connected to the front chassis, and the rear connecting rod is rotatably connected to the rear chassis. When the vehicle is in a folded state, the front connecting rod and the front chassis are retracted together, and the rear connecting rod and the rear chassis are retracted together. The linkage rods are respectively provided between the front link and the first wheel assembly, and between the rear link and the second wheel assembly.

7. The vehicle according to claim 6, characterized in that: The first wheel assembly is provided on both the left and right sides of the front of the front base frame. During the process of the vehicle changing from the unfolded state to the folded state, the two sets of first wheel assemblies flip towards each other and retract to the bottom of the front base frame. And / or, the second wheel assembly is provided on both the left and right sides of the rear of the rear base frame. During the process of the vehicle changing from the unfolded state to the folded state, the two sets of second wheel assemblies flip towards each other and retract to the bottom of the rear base frame.

8. The vehicle according to claim 6, characterized in that: The rear part of the front chassis is rotatably connected to the front part of the rear chassis, and the upper part of the front link is rotatably connected to the upper part of the rear link. When the vehicle is in a folded state, the front chassis and the rear chassis are folded together between the front link and the rear link, and the first wheel body of the first wheel assembly and the second wheel body of the second wheel assembly are close to each other.

9. The vehicle according to claim 6, characterized in that: The rear part of the front underframe is rotatably connected to the front part of the rear underframe. The vehicle frame also includes a front bulkhead, a rear bulkhead, a front support rod, and a rear support rod. The rear part of the front bulkhead, the front part of the rear bulkhead, the upper part of the front connecting rod, and the upper part of the rear connecting rod are rotatably connected. The front support rod is rotatably connected between the front bulkhead and the front underframe, and the rear support rod is rotatably connected between the rear bulkhead and the rear underframe. When the vehicle is in the unfolded state, a load-bearing space is formed between the front frame, the rear frame, and the base frame; when the vehicle is in the folded state, the front frame, front support rod, front connecting rod, front base frame, rear base frame, rear connecting rod, rear support rod, and rear frame are folded together.

10. The vehicle according to claim 9, characterized in that: The vehicle also includes a push rod frame, the lower part of which is rotatably connected to the rear part of the front frame, the front part of the rear frame, the upper part of the front connecting rod, and the upper part of the rear connecting rod via a rotating joint. The rotating joint is provided with a push rod locking member for locking the push rod frame, and a vehicle locking member for locking the front frame, the rear frame, the front connecting rod, and the rear connecting rod together. The vehicle locking member is unlocked when the push rod frame is retracted relative to the vehicle frame.

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