Device for refitting vehicle rear tail door into limo expansion box body
By converting the vehicle's tailgate into a slide-out expansion box and adopting a ring-shaped molding and sealing strip design, the problem of the RV's tailgate failing to expand the space is solved, and the interior space expansion and sealing effect are achieved.
Patent Information
- Application Number
- CN202511049819.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-29
- Publication Date
- 2025-09-19
Smart Images

Figure CN120663834A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a device for converting an original tailgate of a vehicle into an expansion box of a recreational vehicle, and belongs to the technical field of vehicle conversion and recreational vehicle expansion boxes. Background Art
[0002] An RV is a mobile vehicle that combines living and travel functions. The interior space should be large, but the existing RVs or bed cars are modified internally by using a vehicle with a tailgate without changing the tailgate. The function of the tailgate is only to facilitate people getting in and out and up and down, without expanding or increasing the interior space of the vehicle.
[0003] The purpose of the present invention is to change the function of the tailgate and provide a device for converting the original vehicle tailgate into an RV expansion box. The RV expansion box converted from the tailgate is flush with the exterior of the original vehicle body, has a beautiful appearance, can slide out and retract, and increases the internal usable space of the vehicle. It also has an internal and external sealing device for sliding out and retracting to isolate the interior of the vehicle from the external environment. Summary of the Invention
[0004] This application provides a device for converting a vehicle's tailgate into an RV expansion box, using the following technical solutions: A device for converting a vehicle's tailgate into an expansion box for a motorhome includes a vehicle body, a tailgate on the vehicle body, a tailgate gap in the closed state, a tailgate handle on the tailgate, and a tailgate hinge at the connection between the tailgate and the vehicle body. The tailgate gap, the tailgate handle, and the tailgate hinge are removed and then leveled and repaired to form an integrated tailgate shell. The tailgate shell serves as the shell of the expansion box, and the tailgate is converted into an expansion box that slides out and is retracted from the tailgate opening perpendicular to the vehicle body. A frame is added to the shell of the expansion box, and an expansion mechanism is provided on both sides of the bottom of the expansion box. The expansion mechanism is connected to a support frame, and the support frame is provided on both sides of the bottom of the tailgate opening to support the expansion box to slide out and retract.
[0005] By adopting the above technical solution, the tailgate is converted into an expansion box, and the original opening method of the tailgate is changed to an expansion box that slides out and retracts perpendicular to the vehicle body, thereby changing the original function of the tailgate and increasing the usable space in the vehicle. The outer shell of the tailgate serves as the outer shell of the expansion box, and the modified expansion box remains flush with the vehicle body when retracted, without affecting the aesthetics of the vehicle.
[0006] Preferably, the vehicle body floor and the bottom of the modified expansion box do not interfere with each other at the rear tailgate opening of the vehicle body.
[0007] Preferably, the expansion box is provided with an annular molding around one side close to the interior of the vehicle, and a full circle of sealing strip fixing frames are provided on the inner side of the rear tailgate opening of the vehicle body and the plane on the floor of the vehicle body, and a whole annular sealing strip corresponding to the annular molding is fixed on the sealing strip fixing frame.
[0008] By adopting the above technical solution, when the expansion box slides out, when the annular pressure strip presses against the annular sealing strip, the sliding out process of the expansion box is completed. At this time, the slid-out expansion box and the car body are a closed space, which is not affected by the external environment and increases the usable space inside the car.
[0009] Preferably, a second sealing strip fixing frame is provided around the outer side of the rear tailgate opening of the vehicle body, and a second annular sealing strip is installed on the second sealing strip fixing frame.
[0010] By adopting the above technical solution, when the expansion box is retracted, when the outer shell of the expansion box presses the annular sealing strip 2, the expansion box is completely retracted and the interior of the vehicle becomes a sealed space.
[0011] In summary, this application includes at least one of the following beneficial technical effects: 1. The rear tailgate is converted into an expansion box, and the rear tailgate is changed from the original rear opening mode to a mode that slides out and retracts perpendicular to the vehicle body, thus changing the original function of the rear tailgate and increasing the usable space inside the vehicle.
[0012] 2. When the expansion box slides out, the annular pressure strip on the expansion box presses against the annular sealing strip 1, and the expansion box is sealed from the interior of the car to avoid being affected by the external environment.
[0013] 3. When the expansion box is retracted, the outer shell of the expansion box presses the second annular sealing strip, and the interior of the car becomes a closed space, physically isolating the inside of the car from the outside. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the original tailgate opening in the present invention; Figure 2 This is a schematic diagram of the rear tailgate of the present invention being closed; Figure 3 This is a schematic diagram of the expansion box sliding out after modification in the present invention; Figure 4 This is a schematic diagram of the expansion box being retracted after modification in the present invention; Figure 5 This is a schematic diagram of the overall structure after modification in the present invention; Figure 6 This is an oblique view and a front view of the expanded box in the present invention; Figure 7 This is an exploded schematic diagram of the overall structure of the present invention; Figure 8This is a schematic diagram of the sealing strip being squeezed when the expansion box slides out in the present invention; Figure 9 This is a schematic diagram of the sealing strip being squeezed when the expansion box is retracted in the present invention. Explanation of the accompanying reference numerals: 1 vehicle body; 2 vehicle body floor; 3 tailgate; 4 tailgate gap; 5 tailgate opening; 6 tailgate handle; 7 tailgate hinge; 8 expansion box; 9 expansion mechanism; 10 sealing strip fixing frame 1; 11 annular pressure strip; 12 annular sealing strip 1; 13 sealing strip fixing frame 2; 14 annular sealing strip 2; 15 support frame. DETAILED DESCRIPTION
[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0016] Reference Figure 1-5 As shown: A device for converting a vehicle's tailgate into an expansion box for a motorhome, comprising a vehicle body 1, with a tailgate 3 on the vehicle body 1, the tailgate 3 having a tailgate gap 4 when closed, a tailgate handle 6 provided on the tailgate 3, and a tailgate hinge 7 provided at the connection between the tailgate 3 and the vehicle body 1. After the tailgate gap, the tailgate handle 6 and the tailgate hinge 7 are removed and leveled and repaired, the tailgate 3 is converted into an expansion box 8 that slides out and retracts from the tailgate opening 5 of the vehicle body perpendicular to the vehicle body, thereby changing the original function of the tailgate 3 and increasing the usable space in the vehicle. The rear tailgate shell serves as the shell of the expansion box 8, and a frame is added to the shell of the expansion box 8. Expansion mechanisms 9 are provided on both sides of the bottom of the modified expansion box 8. The expansion mechanism 9 is connected to the support frame 15. The body floor 2 of the rear tailgate opening 5 of the vehicle body 1 and the bottom of the expansion box 6 do not interfere with each other. The support frame 15 is provided on both sides above the body floor 2 to bear the weight of the expansion box 8. When the expansion mechanism 9 drives the expansion box 8 to retract, the shell of the expansion box 8 is flush with the body shell.
[0017] Reference Figure 6 、 Figure 7 As shown: the expansion box 8 is provided with an annular molding 11 around the side close to the interior of the vehicle, and a full circle of sealing strip fixing frame 10 is provided on the inner side of the tailgate opening and the plane on the vehicle body floor, and a full circle of annular sealing strip 12 corresponding to the annular molding 11 is fixed on the sealing strip fixing frame 10.
[0018] Reference Figure 8As shown: when the expansion box 8 slides out, when the annular pressure strip 11 presses the annular sealing strip 10, the sliding out process of the expansion box 8 is completed. At this time, the slid-out expansion box 8 and the vehicle body are a closed space, which is not affected by the external environment and increases the usable space in the vehicle.
[0019] Reference Figure 9 As shown, a sealing strip fixing frame 13 is provided around the outside of the tailgate opening 5 of the vehicle body, and a ring-shaped sealing strip 14 is mounted on the sealing strip fixing frame 13. When the expansion box 8 is retracted, when the outer shell of the expansion box 8 presses against the ring-shaped sealing strip 14, the expansion box 8 is completely retracted, and the vehicle interior becomes a closed space.
[0020] The rear tailgate 3 is converted into a motorhome expansion box 8 to increase the usable space inside the car. The setting of the annular pressure strip 11 and the annular sealing strip 12 can prevent the expansion box from being affected by the external environment when it slides out; the setting of the annular sealing strip 2 14 can ensure that when the expansion box is retracted, the interior of the car is sealed and not affected by the external environment.
[0021] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.
Claims
1. A device with internal and external sealing functions for converting a vehicle tailgate into a recreational vehicle expansion box, comprising a vehicle body (1), characterized in that: The vehicle body (1) is provided with a rear door (3), which has a rear door gap (4) when closed, a rear door handle (6) provided on the rear door (3), and a rear door hinge (7) provided at the connection between the rear door (3) and the vehicle body (1). The rear door gap (4), the rear door handle (6) and the rear door hinge (7) are removed and then leveled and repaired to form an integrated rear door shell. The rear door (3) is modified into an expansion box (8) that slides out and is retracted from the rear door opening (5) perpendicular to the vehicle body, and the vehicle body floor (2) at the rear door opening (5) of the vehicle body (1) and the bottom of the modified expansion box (8) do not interfere with each other.
2. The device for converting a vehicle tailgate into a recreational vehicle expansion box with internal and external sealing functions according to claim 1, characterized in that: The rear tailgate shell serves as the shell of the expansion box (8).
3. The device for converting a vehicle tailgate into a recreational vehicle expansion box with internal and external sealing functions according to claim 2, characterized in that: A frame is installed in the outer shell of the expansion box (8), and expansion mechanisms (9) are provided on both sides of the bottom of the expansion box (8). The expansion mechanism (9) is connected to a support frame (15). The support frame (15) is provided on both sides of the bottom of the rear tailgate opening (5) to support the expansion box (8) to slide out and retract.
4. The device for converting a vehicle tailgate into a recreational vehicle expansion box with internal and external sealing functions according to claim 3, characterized in that: The expansion box (8) is provided with an annular molding (11) around one side close to the interior of the vehicle, and a full circle of sealing strip fixing frame (10) is provided on the inner side of the rear tailgate opening (5) and the upper plane of the vehicle body floor (2), and a full circle of annular sealing strip (12) corresponding to the annular molding (11) is fixed on the sealing strip fixing frame (10).
5. The device for converting a vehicle tailgate into a recreational vehicle expansion box with internal and external sealing functions according to claim 4, characterized in that: A second sealing strip fixing frame (13) is provided around the outer sides of the rear tailgate opening (5), and a second annular sealing strip (14) is installed on the second sealing strip fixing frame (13).
Citation Information
Cited By
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