A device for modifying a side wall of a medium-sized vehicle into a house car expansion box
By modifying the side panels of medium-sized vehicles into expandable enclosures and using ring-shaped pressure strips, sealing strips, and airbag devices, the problem of insufficient interior space in medium-sized vehicles is solved, achieving both aesthetic appeal and airtightness of the expandable enclosures, and extending the service life of the RVs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FIVE STAR (SHANXI) RV CO LTD
- Filing Date
- 2026-06-11
- Publication Date
- 2026-07-14
AI Technical Summary
Existing mid-sized motorhomes or campervans have not been effectively modified to have their side panels extended into expandable boxes, resulting in insufficient interior space and poor aesthetics.
The side panels of medium-sized vehicles are removed and converted into expandable boxes. By setting up devices such as ring-shaped pressure strips, sealing strips, and sealing airbags, the expandable boxes can slide out and retract, ensuring sealing and aesthetics, while reducing friction and extending service life.
It increases the interior space of the vehicle, ensures that the expandable box slides out and retracts flush with the vehicle body, is unaffected by the external environment, has good sealing performance, and extends the service life of the RV.
Smart Images

Figure CN224490831U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a device for converting one side panel of a medium-sized vehicle into a motorhome extension box, belonging to the field of vehicle modification and motorhome extension boxes. Background Technology
[0002] A motorhome is a mobile vehicle that integrates living and travel functions. The interior space should be as large as possible. However, existing medium-sized motorhomes or campervans with side panels are only internal modifications and do not have the side panels modified into expandable boxes, thus not increasing the interior space of the vehicle.
[0003] The purpose of this invention is to provide a device for converting the side panel of an existing medium-sized vehicle into an extendable RV body, which includes a sliding sealing device and a retractable sealing device. The converted RV extendable body is flush with the exterior of the vehicle body, has an aesthetically pleasing appearance, can slide out and retract, increases the interior space of the vehicle, and has internal and external sealing devices to isolate the interior and exterior environments of the vehicle. Utility Model Content
[0004] This application provides a device for converting the side panel of a medium-sized vehicle into an expandable RV body, which adopts the following technical solution:
[0005] A device for converting the side panel of a medium-sized vehicle into an expandable RV body includes a vehicle body, characterized in that the vehicle body has a side panel, the side panel is removed from the vehicle body and converted into an expandable body, and the expandable body has expansion structures on both sides of the bottom of the body, the expansion structure including a support frame, the support frame being disposed on both sides of the bottom of the opening of the vehicle body.
[0006] By adopting the above technical solution, the side panel is modified into an extendable box, which increases the usable space inside the vehicle. When the extendable box is retracted, it remains flush with the vehicle body and does not affect the vehicle's aesthetics.
[0007] Preferably, the side of the expansion box closest to the vehicle interior is provided with an annular pressure strip extending beyond the side wall of the expansion box, and a full-circle sealing strip frame is provided on the inner side of the opening of the vehicle body, and a full-circle sealing strip corresponding to the annular pressure strip is fixed on the sealing strip frame.
[0008] By adopting the above technical solution, when the expansion box slides out, the sliding process of the expansion box ends when the annular pressure strip presses against the annular sealing strip. At this time, the slid-out expansion box and the vehicle body form a sealed space, which is not affected by the external environment and increases the usable space inside the vehicle.
[0009] Preferably, a ring-shaped sealing strip is provided around the outer perimeter of the opening of the middle sliding door.
[0010] By adopting the above technical solution, when the extended box is retracted, the outer shell of the middle sliding door presses against the second ring-shaped sealing strip, and the extended box is completely retracted, creating a sealed space inside the vehicle.
[0011] Preferably, it also includes a side frame structure, a fixed sealing groove, a sealing airbag, a solenoid valve, an air source, an inflation conduit, and an airbag conduit. The fixed sealing groove is provided at the opening of the vehicle body, and the sealing airbag is provided in the fixed sealing groove. The solenoid valve and the air source are placed in the vehicle body. The air source is connected to the solenoid valve through the inflation conduit, and the solenoid valve is connected to the sealing airbag through the airbag conduit.
[0012] By adopting the above technical solution, when the expandable box needs to be slid out, the solenoid valve is first driven to release the gas in the sealing airbag, which can reduce the friction between the expandable box and the vehicle body during the sliding process and extend the service life of the RV. When the expandable box is finished sliding out, the solenoid valve drives the air source to fill the sealing airbag with gas through the inflation duct, sealing the expandable box and the vehicle body, and is not affected by the external environment.
[0013] Preferably, compression sealing strips are also provided on both sides of the fixed sealing groove.
[0014] By adopting the above technical solution, if the exterior of the expandable box gets covered with trash during windy or rainy weather while it is being used, squeezing the sealing strip during the retraction process can remove the trash, keeping the interior of the vehicle clean.
[0015] In summary, this application includes at least one of the following beneficial technical effects:
[0016] 1. The side panels were modified into extendable boxes, increasing the interior space. When the extendable boxes are retracted, they remain flush with the vehicle body, without affecting the vehicle's aesthetics.
[0017] 2. When the extension box slides out, the annular pressure strip on the extension box presses against the first annular sealing strip, sealing the extension box against the vehicle interior and protecting it from external environmental influences. When the extension box retracts, the outer shell of the extension box presses against the second annular sealing strip, creating a sealed space inside the vehicle, preventing rainwater from entering during windy or rainy weather.
[0018] 3. When the airbag is inflated, it reduces the gap between the extendable body and the vehicle body when the extendable body is fully retracted and slid out, ensuring that the interior space is not affected by the external environment. When the airbag is deflated, it reduces friction during the retraction and sliding out process, extending the lifespan of the RV. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the vehicle body in this utility model;
[0020] Figure 2 This is a schematic diagram of the disassembled side panel in this utility model;
[0021] Figure 3 This is a schematic diagram of the side panel being modified into an extendable box that slides out in this utility model;
[0022] Figure 4 This is a schematic diagram of the first sealing device in this utility model;
[0023] Figure 5 This is a schematic diagram of the first sealing device in this utility model;
[0024] Figure 6 This is a schematic diagram showing the sealing strip being squeezed when the expansion box is retracted in this utility model;
[0025] Figure 7 This is a schematic diagram showing the sealing strip being squeezed when the expansion box slides out in this utility model;
[0026] Figure 8 This is a schematic diagram of a second sealing device mounted on the vehicle body in this utility model;
[0027] Figure 9 This is a side view of the second type of sealing device in this utility model;
[0028] Figure 10 This is a front view of the second type of sealing device in this utility model;
[0029] Figure 11 This is a schematic diagram of the expansion box with a second sealing device in this utility model;
[0030] Figure 12 This is a schematic diagram of the expansion box sliding out and the sealing airbag being inflated in this utility model.
[0031] Figure 13 This is a schematic diagram of the extended housing retracted and the sealing airbag in the deflated state in this utility model.
[0032] Explanation of reference numerals in the attached drawings: 1. Vehicle body; 2. Side panel; 3. Extension structure; 4. Extension box; 6. Support frame; 8. Sealing strip frame; 9. Ring-shaped pressure strip; 10. Ring-shaped sealing strip one; 11. Ring-shaped sealing strip two; 12. Fixed sealing groove; 13. Sealing airbag; 14. Solenoid valve; 15. Air source; 16. Inflation duct; 17. Airbag duct; 18. Extrusion sealing strip. Detailed Implementation
[0033] 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.
[0034] Reference Figure 1-5 The diagram illustrates a device for converting a side panel 2 of a medium-sized vehicle into an extendable RV body 4. The device includes a vehicle body 1 with a side panel 2. The side panel 2 is detached from the vehicle body 1 and converted into an extendable RV body 4. Extendable structures 3 are provided on both sides of the bottom of the extendable RV body 4. Each extendable structure 3 includes a support frame 6, which is positioned on both sides of the bottom opening of the vehicle body 1. Converting the side panel 2 into an extendable RV body 4 significantly increases the usable interior space.
[0035] The expansion box 4 is provided with annular pressure strips 9 extending beyond the side wall of the expansion box 4 on the side closest to the vehicle interior. A full ring of sealing strip frame 8 is provided on the inner side of the opening of the vehicle body 1. A full ring of sealing strip 10 corresponding to the annular pressure strip 9 is fixed on the sealing strip frame 8.
[0036] Reference Figure 6 As shown: When the expansion mechanism drives the expansion box 4 to slide out, when the annular pressure strip 9 presses against the annular sealing strip 10, the expansion box 4 slides out completely, and the sliding process ends. At this time, the slid-out expansion box 4 and the interior of the vehicle body 1 form an integrated sealed space, which is not affected by the external environment and increases the usable space inside the vehicle.
[0037] Reference Figure 7 As shown: A ring-shaped sealing strip 21 is provided around the outer perimeter of the opening of the vehicle body 1. When the extension box 4 is retracted, the extension box 4 is completely retracted when the outer shell of the extension box 4 presses against the ring-shaped sealing strip 211, and the interior of the vehicle becomes a sealed space.
[0038] The side panel 2 is modified into a motorhome extension box 4 to increase the interior space. The ring-shaped pressure strip 9 and the ring-shaped sealing strip 10 allow the extension box 4 to be unaffected by the external environment when it is slid out. The ring-shaped sealing strip 2 11 ensures that the interior of the vehicle is sealed and unaffected by the external environment when the extension box 4 is retracted.
[0039] Reference Figure 8-10As shown: The sealing device for the sliding and retracting of the extension box 4 can also adopt the following sealing device: The device includes a fixed sealing groove 12, a sealing airbag 13, a solenoid valve 14, an air source 15, an inflation conduit 16, and an airbag conduit 17. The fixed sealing groove 12 is provided at the opening of the vehicle body 1. The sealing airbag 13 is provided in the fixed sealing groove 12. Compression sealing strips 18 are also provided on both sides of the fixed sealing groove 12. The solenoid valve 14 and the air source 15 are placed inside the vehicle body 1. The air source 15 is connected to the solenoid valve 14 through the inflation conduit 16. The solenoid valve 14 is connected to the sealing airbag 13 through the airbag conduit 17.
[0040] Reference Figure 11-12 As shown: The working principle of the sealing device is as follows: There is a certain gap between the air-sealing bladder 13 and the expandable box 4 when the air-sealing bladder 13 is deflated to avoid friction between the expandable box 4 and the air-sealing bladder 13. When the expandable box 4 is not slid out, the air-sealing bladder 13 between the expandable box 4 and the vehicle body 1 is inflated. When the expandable box 4 needs to be slid out, the solenoid valve 14 is driven to release the gas in the air-sealing bladder 13, which can reduce the friction between the expandable box 4 and the air-sealing bladder 13 during the sliding process and extend the service life of the RV. When the expandable box 4 is finished sliding out, the solenoid valve 14 drives the air source 15 to fill the air-sealing bladder 13 with gas through the inflation conduit 16, sealing the expandable box 4 and the vehicle body 1, so that they are not affected by the external environment.
[0041] When the expansion box 4 needs to be retracted, the solenoid valve 14 first releases the gas in the sealing airbag 13, which can reduce the friction between the expansion box 4 and the sealing airbag 13 during the retraction process. If there is garbage on the outside of the expansion box 4, it can be scraped off by squeezing the sealing strip 18 during the retraction process. After the expansion box 4 is fully retracted, the solenoid valve 14 drives the air source 15 to fill the sealing airbag 13 with gas through the inflation conduit 16, sealing the expansion box 4 and the vehicle body 1, so that they are not affected by the external environment.
[0042] When the airbag 13 is inflated, it reduces the gap between the extendable body 4 and the vehicle body 1 when the extendable body 4 is fully retracted and slid out, thus protecting the interior space from external environmental influences. When the airbag 13 is deflated, it reduces friction during the retraction and sliding out process of the extendable body 4, extending the lifespan of the RV. Furthermore, during the retraction of the extendable body 4, squeezing the sealing strip 18 can scrape off any debris attached to the extendable body 4. This sealing device is concealed between the extendable body 4 and the side panel 2 of the vehicle body 1, and is not visible from the outside of the vehicle body 1. The extendable body 4 is flush with the vehicle body 1, resulting in an aesthetically pleasing appearance and excellent sealing performance.
[0043] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.
Claims
1. A device for converting the side panel of a medium-sized vehicle into an extendable RV body, comprising a vehicle body (1), characterized in that, The vehicle body (1) has a side panel (2). The side panel (2) is removed from the vehicle body (1) and converted into an extension box (4). An extension structure (3) is provided on both sides of the bottom of the extension box (4). The extension structure (3) includes a support frame (6). The support frame (6) is provided on both sides of the bottom of the opening of the vehicle body (1). It also includes a fixed sealing groove (12), a sealing airbag (13), a solenoid valve (14), an air source (15), an inflation conduit (16), and an airbag conduit (17). The fixed sealing groove (12) is provided at the opening of the vehicle body (1). The sealing airbag (13) is provided in the fixed sealing groove (12). The solenoid valve (14) and the air source (15) are placed in the vehicle body (1). The air source (15) is connected to the solenoid valve (14) through the inflation conduit (16). The solenoid valve (14) is connected to the sealing airbag (13) through the airbag conduit (17).
2. The device for converting the side panel of a medium-sized vehicle into an extendable RV body according to claim 1, characterized in that, The expansion box (4) has an annular pressure strip (9) extending beyond the side wall of the expansion box (4) on the side closest to the vehicle interior. A full ring of sealing strip frame (8) is provided on the inner side of the opening of the vehicle body (1). A full ring of sealing strip (10) corresponding to the annular pressure strip (9) is fixed on the sealing strip frame (8).
3. The device for converting the side panel of a medium-sized vehicle into an extendable RV body according to claim 2, characterized in that, The vehicle body (1) is provided with annular sealing strips (11) around the outside of the opening.
4. The device for converting the side panel of a medium-sized vehicle into an extendable RV body according to claim 1, characterized in that, The fixed sealing groove (12) is also provided with compression sealing strips (18) on both sides.