A flush mechanism for a lift floor and a floor of a recreational vehicle and an expansion box

By using an electric lifting column to drive the floor, the problem of the recess at the connection between the extension box and the vehicle body is solved, achieving a flush floor inside the RV and improving convenience and safety.

CN224311667UActive Publication Date: 2026-06-02FIVE STAR (SHANXI) RV CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
FIVE STAR (SHANXI) RV CO LTD
Filing Date
2025-08-01
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing expansion box has a dent at the connection with the vehicle body, which makes the floor of the compartment uneven and affects the convenience of personnel movement.

Method used

The floor is raised using an electric lifting column, ensuring that the floor is level when the extended compartment slides out and level when it is retracted. It is fixed by a fixed frame and a support frame to achieve a level floor inside the RV.

Benefits of technology

With the extended and retracted sections in the RV, the interior floor remains level, reducing the risk of tripping, enhancing the user experience, and improving space utilization.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a flush mechanism of lift floor, house car floor and expansion box body, including electric lift column, lift floor, fixed frame, house car floor, chassis and expansion box body, its characterized in be: lift floor is fixed on electric lift column, electric lift column is fixed on fixed frame, fixed frame is fixed on chassis, the top of chassis is provided with house car floor, expansion box body is fixed on fixed frame, the utility model discloses through the action of drive electric lift column drive lift floor, can keep the pure flat state of car compartment inside floor and expansion box body under the state that expansion box body slides out and is retracted, neat and beautiful, the activity of the personnel in the car is convenient.
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Description

Technical Field

[0001] This utility model relates to the field of RV equipment, specifically to a mechanism for a liftable floor that is flush with the RV floor and the floor of the extendable compartment. When the extendable compartment slides out, the liftable floor is flush with the RV floor and the floor of the extendable compartment. When the extendable compartment is retracted, the RV floor and the floor of the extendable compartment are flush, facilitating movement of people inside the vehicle. Background Technology

[0002] An RV extendable body is a compartment structure installed on the side of the RV body that can be extended outwards to increase interior space when needed. When not in use, it fits snugly against the RV body for easy movement and reduced wind resistance. Upon arrival at a campsite or other location, users can extend it outwards using specific operations (such as electric or manual control) to create extra space for more furniture (such as sofas, beds, etc.) or to form a more spacious living area, enhancing the comfort and functionality of the RV's interior space and meeting various needs such as living and leisure.

[0003] Because the current extension box is a box-type structure, in order to facilitate its overall insertion into the vehicle body, the bottom plate of the extension box needs to be higher than the bottom plate of the vehicle body. Therefore, after the extension box is extended outward, the bottom plate of the extension box is higher than the bottom plate of the vehicle body, resulting in a recessed structure in the empty part of the vehicle body floor.

[0004] Regarding the aforementioned technologies, the inventors believe that the current connection between the expansion box and the vehicle body creates a dent, which cannot guarantee that the floor inside the vehicle is completely flat, causing inconvenience for the people inside the vehicle. Utility Model Content

[0005] The purpose of this invention is to provide a mechanism that aligns the lift-up floor with the RV floor and the floor of the expandable enclosure to solve the aforementioned problems. A fixed frame is attached to the RV chassis, and an electric lifting column is fixed to the frame. The lift-up floor is fixed to the electric lifting column. When the expandable enclosure slides out, the electric lifting column drives the lift-up floor to move up until it is flush with the floor of the expandable enclosure, thus filling in the depression in the floor caused by the expansion enclosure's movement and ensuring a flush floor effect inside the RV. When the expandable enclosure retracts, the electric lifting column drives the lift-up floor to move down until it exposes the storage depression of the expandable enclosure, at which point the expandable enclosure is retracted, making the floor of the expandable enclosure flush with the RV floor, facilitating movement.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mechanism for flushing a liftable floor with a motorhome floor and an extendable enclosure floor includes an electric lift column, a liftable floor, a fixing frame, a base plate, a chassis, and an extendable enclosure. The liftable floor is fixed to the electric lift column, the electric lift column is fixed to the fixing frame, the fixing frame is fixed to the chassis, the motorhome floor is positioned above the chassis, and the extendable enclosure has extension mechanisms and support frames on both sides. The support frames are fixed to the fixing plate, and the fixing plate is connected to the fixing frame.

[0008] By adopting the above technical solution, the electric lifting column drives the lifting floor to rise and fall, which can keep the floor inside the vehicle level when the extension box is slid out and retracted. This avoids the problem of uneven floor caused by the extension box sliding out, greatly facilitates the movement of people in the vehicle, reduces the risk of tripping while walking, and improves the user experience.

[0009] Preferably, the expansion box is provided with an expansion mechanism and a support frame, the expansion mechanism and the support frame are connected to each other and slide and retract, and the support frame is connected and fixed to the fixed plate.

[0010] By adopting the above technical solution, the expansion box can be fixed to the fixed plate through the expansion mechanism and support frame, and can slide and retract.

[0011] Preferably, the fixing frame is further provided with a fixing plate corresponding to the support frame to support the expansion box.

[0012] By adopting the above technical solution, the expansion box is connected and fixed by a support frame and a fixing plate.

[0013] Preferably, two electric lifting columns are provided to fix the two ends of the lifting floor; multiple columns may also be provided.

[0014] By adopting the above technical solution, electric lifting columns are fixed at both ends of the lifting floor. The electric lifting columns can smoothly drive the lifting floor to rise and fall, and can also bear the weight of the lifting floor and the load inside the RV.

[0015] Preferably, the shape of the lifting floor corresponds to that of the fixing frame.

[0016] By adopting the above technical solution, when the expansion mechanism drives the expansion box to slide out and retract, it can be ensured that the floor of the expansion box is flush with the floor of the RV and the floor of the lifting device.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. Ensures a flat RV floor: The electric lifting column drives the floor to rise and fall, keeping the RV floor level whether the extended or retracted body is in the extended or retracted state. This avoids unevenness caused by the extended body sliding out and retracting, greatly facilitating the movement of people inside the vehicle, reducing the risk of tripping while walking, and improving the user experience.

[0019] 2. Improved usable space: Without affecting the overall structure and layout of the RV, the sliding extension body and the lifting floor have been implemented, effectively improving the utilization rate of the RV's interior space.

[0020] 3. Easy to operate: The electric lifting column drives the lifting floor, realizing the automated control of the lifting floor's movement. The operation is simple and convenient. Just start the electric lifting column to complete the corresponding action, reducing the tedious steps of manual operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the electric lifting column, lifting floor and fixing frame of the lifting device in this utility model;

[0022] Figure 2 This is a side view and a three-view drawing of the overall structure of the lifting device in its retracted state in this utility model;

[0023] Figure 3 These are three views showing the floor raised in the lifting device of this utility model;

[0024] Figure 4 The three schematic diagrams show the support frame for the expansion box in this utility model;

[0025] Figure 5 This is a schematic diagram showing the retraction of the expansion box and the lifting device not being raised in this utility model.

[0026] Figure 6 This is a schematic diagram showing the extension box sliding out and the lifting device not rising in this utility model.

[0027] Figure 7 This is a schematic diagram showing the sliding out of the expansion box and the raising of the lifting device in this utility model.

[0028] Figure 8 This is a front view of the extension box sliding out and the lifting device rising in this utility model;

[0029] Figure 9 This is a front view of the retraction of the expansion box and the lowering of the lifting device in this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Lifting device; 2. Electric lifting column; 3. Lifting floor; 4. Fixing frame; 5. Chassis; 6. Extendable box; 7. Fixing plate; 8. RV floor; 9. Support frame; 10. Extendable box floor; 11. Extending mechanism. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] See Figures 1-4 As shown: A lifting device 1 includes a mechanism for flushing the lifting floor 3 with the RV floor 8 and the base plate of the expandable box 6. It includes an electric lifting column 2, a lifting floor 3, a fixing frame 4, the RV floor 8, a chassis 5, and the expandable box 6. The lifting floor 33 is fixed to the electric lifting column 22, the lifting column 2 is fixed to the fixing frame 4, and the fixing frame 4 is fixed to the chassis 5. The chassis 5 serves as the load-bearing structure of the vehicle body, possessing strong load-bearing capacity and good shock and impact resistance to adapt to different road conditions. The RV floor 8 is installed on top of the chassis 5. The RV floor 8 is typically made of high-quality steel or aluminum alloy and lies flat on the chassis 5, providing an installation base and load-bearing capacity for the interior facilities. A support frame 9 is installed inside the expandable box 6, and a fixing plate 7 is installed on the fixing frame 4. The expandable box 6 is connected and fixed to the fixing frame 4 via the support frame 9 and the fixing plate 7. There are two electric lifting columns 2, which are used to fix the two ends of the lifting floor 3. Multiple columns can also be installed. The shape of the lifting floor 3 corresponds to that of the fixing frame 4.

[0034] Reference Figures 4-6 As shown: When the expansion mechanism 11 drives the expansion box 6 to slide out completely, the electric lifting column 2 drives the lifting floor 3 to move upward until the lifting floor 3 fills the pit created by the expansion box 6 sliding outward, thereby ensuring that the expansion box 6 expansion box floor 10 is flush with the lifting floor 3 and the RV floor 8 after the expansion box 6 is expanded.

[0035] Reference Figure 7 , Figure 8 As shown: When the extension mechanism 11 drives the extension box 6 to retract, the electric lifting column 2 drives the lifting floor 3 to descend. When the lifting floor is lowered to expose the storage recess of the extension box 6, the extension box 6 is retracted. At this time, the extension box 6 and the extension box floor 10 are flush with the RV floor 8.

[0036] The electric lifting column 2 drives the lifting floor 3 to rise and fall, ensuring the interior floor of the vehicle remains perfectly flat. This not only facilitates movement and activity for passengers but also ensures the stable placement of furniture and equipment, preventing items from tipping over due to an uneven floor. For example, a flat floor provides better support when placing furniture such as tables and beds, improving comfort and safety. Furthermore, for elderly people or children with mobility issues, a flat floor reduces the risk of tripping while walking inside the vehicle, providing them with a safer environment.

[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A mechanism for flushing a lift-up floor with a motorhome floor and an extendable enclosure floor, comprising an electric lift column (2), a lift-up floor (3), a fixing frame (4), a motorhome floor (8), a chassis (5), and an extendable enclosure (6), characterized in that: The lifting floor (3) is fixed on the electric lifting column (2), the electric lifting column (2) is fixed on the fixed frame (4), the fixed frame (4) is fixed on the chassis (5), the RV floor (8) is provided above the chassis (5), the expansion box (6) is fixedly connected to the support frame (9), the support frame (9) is connected to the corresponding fixed plate (7), and the fixed plate (7) is connected to the fixed frame (4).

2. The flush mechanism between the lifting floor and the RV floor and the extendable cabin floor according to claim 1, characterized in that, The expansion box (6) is equipped with a support frame (9) and an expansion mechanism (11) which are connected and fixed to the fixed frame (4).

3. The flush mechanism between the lifting floor and the RV floor and the extendable cabin floor according to claim 2, characterized in that, The fixing frame (4) is also provided with a fixing plate (7) corresponding to the support frame (9) for fixing and connecting the expansion box (6).

4. The flush mechanism between the lift-up floor and the RV floor and the extendable cabin floor according to claim 3, characterized in that, Two electric lifting columns (2) are provided to fix the two ends of the lifting floor (3), or multiple columns are provided.

5. The flush mechanism between the lifting floor and the RV floor and the extendable cabin floor according to claim 4, characterized in that, The shape of the lifting floor (3) is set to correspond to the shape of the fixed frame (4).