Multifunctional double-layer liftable car roof rack

Abstract

A multifunctional double-layer liftable car roof rack, comprising a bottom frame, a first top frame, a second top frame, a linkage lifting frame and a driving mechanism; the linkage lifting frame comprises a first scissor lifting frame and a second scissor lifting frame, the lower end of the first scissor lifting frame being pivoted to the bottom frame, and the upper end of the second scissor lifting frame being pivoted to the second top frame. The upper end of the first scissor lifting frame and the lower end of the second scissor lifting frame are pivoted to each other and then are pivoted to the first top frame together, such that the first scissor lifting frame and the second scissor lifting frame are linked. The driving mechanism drives the first scissor lifting frame and the second scissor lifting frame of the linkage lifting frame to be unfolded upwards or to be collapsed downwards, so as to further drive the first top frame and the second top frame to ascend for unfolding or descend for collapsing relative to the bottom frame. The multifunctional double-layer liftable car roof rack has a simple structure since the linked lift frames therein share only one driving mechanism; moreover, when being completely unfolded, the multifunctional double-layer liftable car roof rack has a relatively large space for movement, thereby satisfying user requirements.

Description

A multifunctional double-layer lifting vehicle-mounted tent Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted tents, in particular to a multifunctional double-layer lifting vehicle-mounted tent. Background Art

[0002] A car tent is a roof-mounted bracket designed to easily secure large items. It's the cornerstone of any rooftop mounting solution. Most commonly used for self-drive tours, it can be used to carry luggage, tents, and other sports equipment like skis, bicycles, and sailboats.

[0003] Most existing lift-type car tents are single-layer platforms with limited space, which cannot meet the needs of larger spaces. Existing lift-type car tents with double-layer structures have a heavy double-layer platform, and the parts used to support and lift the entire platform structure are relatively complicated, resulting in the entire car tent structure being complicated, bulky, and having poor practicality.

[0004] In order to solve the above problems, the inventors propose a multifunctional double-layer liftable car tent with a large activity space, a simple structure and stability. Technical issues

[0005] The purpose of the present invention is to provide a multifunctional double-layer lifting vehicle-mounted tent, which can be unfolded or folded by upper and lower double-layer lifting frames. When unfolded, it has two layers of accommodation space to meet the user's demand for a larger activity space. In addition, the two groups of scissor-type lifting frames in the linked lifting frame share a driving mechanism, which has a simple structure and high stability. Technical Solutions

[0006] To achieve the above objectives, the present invention provides a solution: a multifunctional double-layer lift-type vehicle-mounted tent, comprising a base frame, a first top frame, a second top frame, a linkage lift frame, and a drive mechanism. The base frame is used to be installed on a vehicle, with the first top frame located above the base frame and the second top frame located above the first top frame. The linkage lift frame comprises a first scissor-type lift frame and a second scissor-type lift frame. The lower end of the first scissor-type lift frame is pivotally connected to the base frame, and the upper end of the second scissor-type lift frame is pivotally connected to the second top frame. The upper end of the first scissor-type lift frame is pivotally connected to the lower end of the second scissor-type lift frame, and both are pivotally connected to the first top frame, so that the first scissor-type lift frame and the second scissor-type lift frame are linked.

[0007] The driving mechanism drives the first scissor-type lifting frame and the second scissor-type lifting frame of the linkage lifting frame to rise and expand or to descend and fold, thereby driving the first top frame and the second top frame to rise and expand or to descend and fold relative to the bottom frame.

[0008] Furthermore, the rear end of the multifunctional double-layer lifting vehicle tent is provided with two sets of the linkage lifting frames, which are symmetrically arranged on the left and right sides of the multifunctional double-layer lifting vehicle tent, and each set of the linkage lifting frames is driven to rise and fall by a driving mechanism.

[0009] Furthermore, the driving mechanism is an electric telescopic rod. When the electric telescopic rod is extended or shortened, it drives the same ends of the two forks of the connected scissor-type lifting frame to move closer to or away from each other, and at the same time, it drives the same ends of the two forks of the other scissor-type lifting frame to move closer to or away from each other, so that the first top frame and the second top frame rise and expand or fall and fold relative to the bottom frame.

[0010] Furthermore, the first scissor-type lifting frame includes a first fork and a second fork, and the second scissor-type lifting frame includes a third fork and a fourth fork, wherein the upper end of the second fork is pivotally connected to the lower end of the third fork, and the pivot point is a movable pivot point A, and the movable pivot point A is slidably provided on the first top frame via a sliding member;

[0011] The upper end of the first fork is pivotally connected to the lower end of the fourth fork, and the pivot point is a fixed pivot point B, which is fixed on the first top frame.

[0012] Furthermore, the base frame is provided with a first slide rail with an upward opening along its length direction, the lower end of the second fork is fixedly pivoted to one end of the first slide rail, and the lower end of the first fork is slidably arranged on the first slide rail via a first pulley set;

[0013] The second top frame is provided with a second slide rail with an opening downward at a position corresponding to the first slide rail. The upper end of the third fork is fixedly pivoted to one end of the second slide rail, and the upper end of the fourth fork is slidably arranged in the second slide rail through a second pulley set.

[0014] Furthermore, a slide groove extending along the length direction of the first top frame is provided on the side surface of the first top frame, and the movable pivot point A of the first scissor-type lifting frame and the second scissor-type lifting frame is slidably set on the slide groove through a sliding member.

[0015] Furthermore, the output end of the electric telescopic rod is pivotally connected to the third fork, and the fixed end of the electric telescopic rod is pivotally connected to the second fork. When the electric telescopic rod is extended, the upper and lower ends of the third fork are respectively driven to approach the upper and lower ends of the fourth fork, thereby raising the second top frame, and at the same time, the upper and lower ends of the first fork are respectively driven to approach the upper and lower ends of the second fork, thereby raising the first top frame; conversely, the electric telescopic rod is shortened, thereby lowering the second top frame and the first top frame.

[0016] Furthermore, a foldable ladder is provided between the base frame and the first top frame, and the foldable ladder includes a first ladder frame and a second ladder frame. The lower end of the first ladder frame is pivotally connected to the base frame, the upper end of the first ladder frame is pivotally connected to the lower end of the second ladder frame, and the upper end of the second ladder frame is pivotally connected to the first top frame. When the first top frame rises or falls, it drives the second ladder frame to expand or fold relative to the first ladder frame.

[0017] Furthermore, the first top frame is equipped with a folding platform, which includes a middle bottom plate, a first side plate and a second side plate. The middle bottom plate is fixed to the first top frame, and the first side plate and the second side plate are rotatably arranged on both sides of the middle bottom plate. After the first side plate and the second side plate are flipped and folded, they are stacked in sequence on top of the middle bottom plate.

[0018] The middle bottom plate is provided with a skylight, and a sliding cover is provided on the skylight, and the sliding cover slides to open or close the skylight;

[0019] A top cover is provided above the second top frame, and the top cover has a cover edge around it. The top cover and the cover edge form a storage space with an outer contour greater than or equal to the outer contour of the first top frame. The top cover rises or falls with the second top frame. When the top cover falls into place, it covers the first top frame and hides the folded second scissor-type lifting frame in the storage space.

[0020] The middle part of the top cover is provided with an opening, and a cover for opening or closing the opening is provided at the opening.

[0021] Furthermore, both sides of the first top frame are equipped with detachable tent support frames for installing tent cloth, and the tent support frames include a fixed rod and a plurality of support rods rotating around an axis of the fixed rod; when the tent cloth needs to be installed, the support rods are extended outward from the fixed rod to different angles for the tent cloth to be covered; when it needs to be folded, each support rod is folded toward the fixed rod to complete the storage. Beneficial effects

[0022] After adopting the above solution, the beneficial effects of the present invention are:

[0023] The lifting of the multifunctional double-layer lifting vehicle tent of the present invention is achieved by at least one set of linked lifting frames and a driving mechanism, wherein a first scissor-type lifting frame is supported between a base frame and a first top frame, a second scissor-type lifting frame is linked to the first scissor-type lifting frame and supported between the first top frame and the second top frame, and the driving mechanism drives the first scissor-type lifting frame and the second scissor-type lifting frame of the linked lifting frames to rise and deploy or descend and retract, thereby driving the first top frame and the second top frame to rise and deploy or descend and retract relative to the base frame.

[0024] The multifunctional double-layer lifting car tent of the present invention is mainly used for being installed in the rear box of a pickup truck, and the bottom frame is mounted on the rear box of the car. When folded, the space between the first top frame and the rear box of the car can be used to store luggage; when unfolded, a first activity space is formed between the first top frame and the rear box of the car, and a second activity space is formed between the first top frame and the second top frame, that is, a double-layer activity space is formed.

[0025] In the present invention, two scissor-type lifting frames in a set of linked lifting frames share a driving mechanism, which greatly saves on the arrangement of parts and makes the structure of the entire multifunctional double-layer lifting vehicle-mounted tent simpler.

[0026] In addition, the folding ladder connected to the base frame and the first top frame unfolds as the first top frame rises, and is supported between the base frame and the first top frame. It can be used by users to climb and can also serve as a supporting component to improve the stability of the overall structure of the multifunctional double-layer lifting car tent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] FIG1 is a diagram of a multifunctional double-layer lifting vehicle-mounted tent in a folded state (top) according to an embodiment of the present invention;

[0028] FIG2 is a diagram of a multifunctional double-layer lifting vehicle-mounted tent in a folded state (bottom);

[0029] FIG3 is a perspective view of a multifunctional double-layer lifting vehicle-mounted tent in an expanded state according to an embodiment of the present invention;

[0030] FIG4 is a side view of a multifunctional double-layer lifting vehicle-mounted tent in an expanded state according to an embodiment of the present invention;

[0031] FIG5 is a schematic structural diagram of a second top frame and a second shear-type lifting frame according to an embodiment of the present invention;

[0032] FIG6 is a diagram of a folding platform in a folded state according to an embodiment of the present invention;

[0033] 7 is a schematic structural diagram of a foldable ladder according to an embodiment of the present invention;

[0034] FIG8 is a schematic diagram of a tent support frame in an expanded state according to an embodiment of the present invention.

[0035] Description of labels:

[0036] 1. Base frame; 11. First slide rail; 2. First top frame; 21. Slide groove; 3. Second top frame; 31. Second slide rail; 4. First scissor-type lift frame; 41. First fork; 42. Second fork; 5. Second scissor-type lift frame; 51. Third fork; 52. Fourth fork; 6. Electric telescopic rod; 7. Folding ladder; 71. First ladder frame; 72. Second ladder frame; 8. Folding platform; 81. Middle bottom plate; 82. First side plate; 83. Second side plate; 9. Skylight; 10. Sliding cover; 12. Top cover; 121. Cover edge; 122. Cross bar; 123. Opening; 13. First pulley block; 14. Second pulley block; 15. Synchronizing rod; 16. Contact switch; 17. Tent support frame; 171. Fixing rod; 172. Support rod. Best Mode for Carrying Out the Invention

[0037] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] The present invention provides a multifunctional, double-layer, liftable vehicle-mounted tent, as shown in Figures 1 to 8 . The tent comprises a base frame 1, a first top frame 2, a second top frame 3, a linkage lift frame, a drive mechanism, and a foldable ladder 7. The base frame 1 is intended to be mounted on a vehicle, primarily the rear bed of a pickup truck. There are various ways to mount the base frame 1 to the rear bed of a vehicle. This embodiment provides a mounting method in which the base frame 1 is provided with mounting holes, which are locked and secured to the rear bed of the vehicle using bolts or other fasteners. Alternatively, the base frame 1 and the rear bed of the vehicle can be mounted by sliding on rails.

[0039] The first top frame 2 is located above the bottom frame 1, and the second top frame 3 is located above the first top frame 2. The linkage lifting frame is used to raise or lower the first top frame 2 and the second top frame 3. When raised, a first movable space is formed between the bottom frame 1 and the first top frame 2, and a second movable space is formed between the first top frame 2 and the second top frame 3, thereby forming a multifunctional double-layer lifting vehicle tent with a double-layer accommodation space; when lowered, the first top frame 2 and the second top frame 3 are folded in sequence above the bottom frame 1.

[0040] With particular reference to Figures 3 and 4, the linked lifting frame includes a linked first scissor-type lifting frame 4 and a second scissor-type lifting frame 5. The lower end of the first scissor-type lifting frame 4 is pivotally connected to the base frame 1, and the upper end of the second scissor-type lifting frame 5 is pivotally connected to the second top frame 3. The upper end of the first scissor-type lifting frame 4 is pivotally connected to the lower end of the second scissor-type lifting frame 5, and are pivotally connected together to the first top frame 2, so that the first scissor-type lifting frame 4 and the second scissor-type lifting frame 5 are linked.

[0041] In this embodiment, two sets of the linkage lifting frames are provided at the rear end of the multifunctional double-layer lifting vehicle tent, and the two sets of linkage lifting frames are symmetrically arranged on the left and right sides of the multifunctional double-layer lifting vehicle tent, making the structure of the entire multifunctional double-layer lifting vehicle tent more stable.

[0042] The specific structure and linkage relationship of the first scissor-type lift frame 4 and the second scissor-type lift frame 5 are as follows: As shown in Figures 3 and 4, the first scissor-type lift frame 4 includes a first fork 41 and a second fork 42, and the second scissor-type lift frame 5 includes a third fork 51 and a fourth fork 52. As shown in Figure 3, the bottom frame 1 is provided with a first slide rail 11 with an upward opening along its length; as shown in Figure 5, the second top frame 3 is provided with a second slide rail 31 with a downward opening at a position corresponding to the first slide rail 11; as shown in Figure 3, the side of the first top frame 2 is provided with a slide groove 21 extending along the length of the first top frame 2 and passing through from left to right.

[0043] The lower end of the second fork 42 is fixedly pivoted on the first slide rail 11; the upper end of the third fork 51 is fixedly pivoted on the second slide rail 31; the upper end of the second fork 42 is pivotally connected to the lower end of the third fork 51, and the pivot point is a movable pivot point A (as shown in Figure 3). The movable pivot point A is connected to a sliding member, which is arranged in the slide groove 21 of the first top frame 2 and can slide along the slide groove 21, thereby causing the movable pivot point A to be slidably set on the first top frame 2.

[0044] The lower end of the first fork 41 is pivotally connected to the first pulley block 13, which slides onto the first slide rail 11 of the base frame 1 via the first pulley block 13. The upper end of the fourth fork 52 is pivotally connected to the second pulley block 14, which slides onto the second slide rail 31 of the second top frame 3 via the second pulley block 14. Furthermore, the upper end of the first fork 41 is pivotally connected to the lower end of the fourth fork 52 at a fixed pivot point B (as shown in Figure 8). Fixed pivot point B is fixed to the first top frame 2 and located in the sliding direction of the movable pivot point A. Thus, through the connection of these components, the first scissor-type lift frame 4 and the second scissor-type lift frame 5 form a mutually linked lifting structure.

[0045] In the present invention, each set of linked lifting frames is equipped with a corresponding drive mechanism. That is, the two scissor-type lifting frames in each set share a common drive mechanism. The drive mechanism can be electric, pneumatic, or otherwise. In this embodiment, the drive mechanism utilizes an electric telescopic rod 6. This electric telescopic rod 6 extends and retracts the connected scissor-type lifting frame, simultaneously driving the other scissor-type lifting frame upward or downward, thereby causing the first top frame 2 and the second top frame 3 to rise or fall relative to the base frame 1.

[0046] In this embodiment, as shown in Figure 3, the fixed end of the electric telescopic rod 6 is pivotally connected to the second fork 42, and the output end of the electric telescopic rod 6 is pivotally connected to the third fork 51. When the multifunctional double-layer lift vehicle tent is to be deployed, the electric telescopic rod 6 is controlled to extend, driving the lower end of the third fork 51 to approach the lower end of the fourth fork 52, and the upper end of the fourth fork 52 to approach the upper end of the third fork 51, thereby raising the second top frame 3. Simultaneously, the upper end of the first fork 41 is driven to approach the upper end of the second fork 42, and the lower end of the first fork 41 to approach the lower end of the second fork 42, thereby raising the first top frame 2. When the first and second top frames 2 and 3 are raised to their proper positions, the electric telescopic rod 6 stops extending. Conversely, the electric telescopic rod 6 shortens, causing the second and first top frames 3 and 2 to descend, thereby folding. The two scissor-type lift frames in each set of linked lift frames share a common drive mechanism. This design not only reduces the number of components but also simplifies the overall structure of the multifunctional double-layer lift vehicle tent, making deployment and folding more convenient.

[0047] Furthermore, the left and right movable pivot points A of the first top frame 2 are linked by a synchronization rod 15. As shown in Figure 2, the synchronization rod 15 passes through the left and right guide slots 21 and connects to the movable pivot points A on both sides. The primary function of the synchronization rod 15 is to achieve the linkage between the left and right movable pivot points A. Specifically, when the movable pivot points A move, the synchronization rod 15 ensures that the position and motion state of the movable pivot points A remain consistent, thereby improving the stability and coordination of the entire mechanism.

[0048] With particular reference to Figures 4 and 7 , to facilitate access to the second-floor platform, a foldable access ladder 7 is provided between the base frame 1 and the first top frame 2 of the multifunctional double-layered lift vehicle tent of the present invention. In this embodiment, the foldable access ladder 7 is located at the front end of the tent, on the side closest to the front of the vehicle. The foldable access ladder 7 deploys as the first top frame 2 rises and is supported between the base frame 1 and the first top frame 2, or folds as the first top frame 2 descends and is retracted between the base frame 1 and the first top frame 2. Specifically, the foldable access ladder 7 includes a first ladder frame 71 and a second ladder frame 72. The upper end of the first ladder frame 71 is pivotally connected to the lower end of the second ladder frame 72. The lower end of the first ladder frame 71 is pivotally connected to the base frame 1, and the upper end of the second ladder frame 72 is pivotally connected to the first top frame 2. A locking device (not shown) is provided at the pivotal connection between the first ladder frame 71 and the second ladder frame 72. A contact switch 16 is provided at the front end of the first ladder frame 71.

[0049] When the first top frame 2 rises, it drives the second ladder frame 72 to unfold relative to the first ladder frame 71. At this time, the first ladder frame 71 and the second ladder frame 72 are not fully unfolded, and the angle between them is less than 180 degrees. It is necessary to manually press the first ladder frame 71 and the second ladder frame 72 to fully unfold to an angle of 180 degrees. At this time, the contact switch 16 at the front end of the first ladder frame 71 contacts the front part of the multi-functional double-layer lifting vehicle tent or the vehicle body, triggering the switch, and the foldable climbing ladder 7 is automatically locked, so that the entire foldable climbing ladder cannot be folded at will. If the foldable climbing ladder 7 needs to be folded, the locking device must be unlocked first, and the ladder frame is pulled outward to slightly fold the ladder frame so that the ladder frame does not contact the contact switch 16. After being unlocked, the first ladder frame 71 and the second ladder frame 72 can be folded and lowered along with the first top frame 2. The unfolded climbing ladder can not only be used for climbing by the user, but also play the role of supporting the bottom frame 1 and the first top frame 2, thereby improving the stability of the multi-functional double-layer lifting vehicle tent structure. On the contrary, when the first top frame 2 descends, it drives the second ladder frame 72 to fold relative to the first ladder frame 71, and the entire foldable ladder 7 is folded between the bottom frame 1 and the first top frame 2, reducing the space occupied by the roof, while reducing wind resistance during driving and improving driving safety.

[0050] With particular reference to Figures 3, 4, and 6, the first top frame 2 is equipped with a folding platform 8, which includes a middle bottom panel 81, a first side panel 82, and a second side panel 83. The middle bottom panel 81 is fixed to the first top frame 2 and is the same size as the first top frame. The first side panels 82 and the second side panels 83 are pivotally connected to either side of the middle bottom panel 81. When the range of movement needs to be expanded, the first and second side panels 82, 83 are unfolded to the sides so that they are in the same plane as the middle bottom panel 81, thereby expanding the platform's range of movement. The first and second side panels 82, 83 are folded toward the middle bottom panel 81 so that they are stacked above the middle bottom panel 81, thus achieving the folding of the folding platform 8.

[0051] Both sides of the first top frame 2 are equipped with tent support frames 17 for installing tent cloth, which can provide space for users to move around and rest on both sides of the vehicle. The tent support frame 17 includes a fixed rod 171 and a plurality of support rods 172 that rotate around an axis of the fixed rod 171. The fixed rod 171 is detachably mounted on the side of the first top frame 2. When the tent cloth needs to be installed, the support rods 172 can be extended outward from the fixed rod 171 to different angles for the tent cloth to be covered; when it needs to be folded, each support rod 172 is folded towards the fixed rod 171 to complete the storage. When the tent cloth is not needed, the entire tent support frame 17 can also be removed from the first top frame 2.

[0052] In addition, as shown in FIG6 , a skylight 9 is provided on the middle bottom plate 81 , and a sliding cover 10 is provided on the skylight 9 , which slides to open or close the skylight 9 . A foldable ladder 7 is located at the skylight 9 , and after a user reaches the skylight 9 via the foldable ladder 7 , they can enter the activity area of ​​the foldable platform 8 through the skylight 9 .

[0053] As shown in Figures 1 and 2, a top cover 12 is positioned above the second top frame 3. The top cover 12 is surrounded by a lip 121. The top cover 12 and the lip 121 form a storage space with an outer contour equal to or larger than that of the first top frame 2. The top cover 12 rises and falls with the second top frame 3. When lowered into place, it covers the base frame 1, the first top frame 2, and the second top frame 3. The linkage lifting frame, folding platform 8, and electric telescopic rod 6 are all concealed within the storage space formed by the top cover 12 and the lip 121. The top cover 12 has an opening 123 in the middle. A flexible lid (not shown) is located over the opening 123, allowing the user to selectively open and close the lid. When the lid is opened, the opening 123 becomes a multifunctional window. It not only enhances the lighting within the tent, making the interior brighter and more comfortable, but also facilitates ventilation, effectively removing damp and polluted air and maintaining a fresh interior environment. Furthermore, this opening 123 provides a more diverse user experience. At night, the user can lie in the tent and enjoy the beautiful starry sky and the charm of nature through the opening 123. For photography enthusiasts, the opening 123 also provides an excellent shooting angle, and they can lean out of the tent to capture the scenery outside.

[0054] As shown in FIG8 , two cross bars 122 are provided above the top cover 12 , which can be used to store luggage, bicycles and other items.

[0055] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the present disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, one of ordinary skill in the art will understand other possible embodiments and the advantages of the present invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0056] At the same time, the directions such as front, back, left, and right involved in this embodiment are only used as a reference for directions and do not represent directions in actual use. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the scope of protection of this case.

Claims

1. A multifunctional double-layer lifting vehicle-mounted tent, characterized in that: The invention comprises an underframe, a first top frame, a second top frame, a linkage lifting frame and a driving mechanism, wherein the underframe is used to be installed on a vehicle, the first top frame is located above the underframe, and the second top frame is located above the first top frame; the linkage lifting frame comprises a first scissor-type lifting frame and a second scissor-type lifting frame, the lower end of the first scissor-type lifting frame is pivotally connected to the underframe, the upper end of the second scissor-type lifting frame is pivotally connected to the second top frame, the upper end of the first scissor-type lifting frame is pivotally connected to the lower end of the second scissor-type lifting frame, and they are pivotally connected to the first top frame together, so that the first scissor-type lifting frame is linked with the second scissor-type lifting frame; the driving mechanism drives the first scissor-type lifting frame and the second scissor-type lifting frame of the linkage lifting frame to rise and expand or to descend and fold, thereby driving the first top frame and the second top frame to rise and expand or to descend and fold relative to the underframe.

2. A multifunctional double-layer lifting vehicle-mounted tent as claimed in claim 1, characterized in that: The rear end of the multifunctional double-layer lifting vehicle tent is provided with two groups of linkage lifting frames, which are symmetrically arranged on the left and right sides of the multifunctional double-layer lifting vehicle tent, and each group of linkage lifting frames is driven to lift by a driving mechanism.

3. A multifunctional double-layer lifting vehicle-mounted tent as claimed in claim 1 or 2, characterized in that: The driving mechanism is an electric telescopic rod, which extends or shortens to drive the same ends of the two forks of the connected scissor-type lifting frame to move closer to or farther from each other, and at the same time, drives the same ends of the two forks of another scissor-type lifting frame to move closer to or farther from each other, so that the first top frame and the second top frame rise and expand or fall and fold relative to the bottom frame.

4. A multifunctional double-layer lifting vehicle-mounted tent as claimed in claim 3, characterized in that: The first scissor-type lifting frame includes a first fork and a second fork, and the second scissor-type lifting frame includes a third fork and a fourth fork, wherein the upper end of the second fork is pivoted to the lower end of the third fork, and the pivot point is a movable pivot point A, and the movable pivot point A is slidably arranged on the first top frame through a sliding member; the upper end of the first fork is pivoted to the lower end of the fourth fork, and the pivot point is a fixed pivot point B, and the fixed pivot point B is fixed on the first top frame; the upper end of the first fork is pivoted to the lower end of the fourth fork, and the pivot point is a fixed pivot point B, and the fixed pivot point B is fixed on the first top frame.

5. The multifunctional double-layer lifting vehicle-mounted tent as claimed in claim 4, characterized in that: The bottom frame is provided with a first slide rail opening upward along its length direction, the lower end of the second fork is fixedly pivoted to one end of the first slide rail, and the lower end of the first fork is slidably set on the first slide rail through a first pulley group; the second top frame is provided with a second slide rail opening downward at a position corresponding to the first slide rail, the upper end of the third fork is fixedly pivoted to one end of the second slide rail, and the upper end of the fourth fork is slidably set in the second slide rail through the second pulley group.

6. The multifunctional double-layer lifting vehicle-mounted tent according to claim 5, characterized in that: A slide groove extending along the length direction of the first top frame is provided on the side surface of the first top frame, and the movable pivot point A of the first scissor-type lifting frame and the second scissor-type lifting frame is slidably arranged on the slide groove through a sliding member.

7. The multifunctional double-layer lifting vehicle-mounted tent according to claim 4, characterized in that: The output end of the electric telescopic rod is pivotally connected to the third fork, and the fixed end of the electric telescopic rod is pivotally connected to the second fork. The electric telescopic rod is extended to drive the upper and lower ends of the third fork to approach the upper and lower ends of the fourth fork respectively, thereby raising the second top frame, and at the same time drive the upper and lower ends of the first fork to approach the upper and lower ends of the second fork respectively, thereby raising the first top frame; conversely, the electric telescopic rod is shortened to lower the second top frame and the first top frame.

8. The multifunctional double-layer lifting vehicle-mounted tent according to claim 1, characterized in that: A foldable ladder is provided between the bottom frame and the first top frame, and the foldable ladder includes a first ladder frame and a second ladder frame. The lower end of the first ladder frame is pivotally connected to the bottom frame, the upper end of the first ladder frame is pivotally connected to the lower end of the second ladder frame, and the upper end of the second ladder frame is pivotally connected to the first top frame. When the first top frame rises or falls, it drives the second ladder frame to unfold or fold relative to the first ladder frame.

9. The multifunctional double-layer lifting vehicle-mounted tent according to claim 1, characterized in that: The first top frame is provided with a folding platform, the folding platform comprising a middle bottom plate, a first side plate and a second side plate, the middle bottom plate being fixed on the first top frame, the first side plate and the second side plate being rotatably arranged on both sides of the middle bottom plate, and the first side plate and the second side plate being flipped and folded, being stacked in sequence on top of the middle bottom plate; a skylight is provided on the middle bottom plate, a sliding cover is provided on the skylight, and the sliding cover slides to open or close the skylight; a top cover is provided above the second top frame, the top cover is provided with cover edges around it, the top cover and the cover edges form a storage space whose outer contour is greater than or equal to the outer contour of the first top frame, the top cover rises or falls with the second top frame, and when the top cover falls into place, it covers the first top frame and hides the folded second scissor-type lifting frame in the storage space; an opening is provided in the middle of the top cover, and a lid for opening or closing the opening is provided at the opening.

10. The multifunctional double-layer lifting vehicle-mounted tent according to claim 1, characterized in that: Both sides of the first top frame are equipped with detachable tent support frames for installing tent cloth, and the tent support frames include a fixed rod and a plurality of support rods rotating around an axis of the fixed rod; when the tent cloth needs to be installed, the support rods are extended outward from the fixed rod to different angles for the tent cloth to be covered; when the tent cloth needs to be folded, each support rod is folded toward the fixed rod to complete the storage.

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