A recreational vehicle expansion support structure

Abstract

The utility model embodiment provides a kind of house car development support structure, it is related to house car technical field, including vertical pole, the middle part of vertical pole is provided with horizontal bar, the side of horizontal bar is provided with connecting foot, the lower end of horizontal bar is provided with adjusting unit, by being provided with horizontal bar in vertical pole middle part, form rectangular frame type support structure, horizontal bar not only plays the horizontal connection and support effect to two sides vertical pole, prevent its lateral bending or instability when being stressed, also significantly improve the carrying capacity and deformation resistance of entire support system to development box, ensure the safety and reliability under the state of house car development process and use, the connecting foot of horizontal bar side surface setting can connect horizontal bar and development box directly, make the weight and external load of development box effectively pass through connecting foot and be transferred to horizontal bar, and further by two sides vertical pole jointly bear, optimize the force transmission path, avoid local stress concentration.

Description

Technical Field

[0001] This utility model relates to the field of RV technology, and in particular to an RV extension support structure. Background Technology

[0002] With the rapid development of the RV industry and the increasing demand for outdoor travel, expandable RVs have become widely popular due to their ability to expand usable space and improve living comfort when parked. As the core component for achieving space expansion, the expansion box's stable support after deployment is crucial, directly affecting the safety and comfort of the entire vehicle.

[0003] Existing RV extension support structures mostly use independent vertical support rods or simple triangular support frames. The independent support rods lack effective lateral connections, resulting in poor overall structural rigidity. When subjected to the weight of the extension box or encountering external loads such as lateral wind loads and ground vibrations, they are prone to lateral bending, swaying, or even instability, affecting safety during use. Utility Model Content

[0004] The purpose of this utility model is to provide a motorhome extension support structure that can avoid the problems of poor overall structural rigidity due to the lack of effective lateral connection between independent support rods, which can easily lead to lateral bending, swaying or even instability when bearing the weight of the extension box or encountering external loads such as lateral wind loads and ground vibrations.

[0005] This utility model provides a motorhome extension support structure, including:

[0006] A vertical rod is provided, and a horizontal rod is provided in the middle of the vertical rod. The vertical rod and the horizontal rod are arranged in a rectangle. A connecting foot is provided on the side of the horizontal rod, and an adjustment unit is provided at the lower end of the horizontal rod.

[0007] Preferably, a lifting rod is installed in the inner cavity of the vertical rod, and a worm gear is provided at the lower end of the lifting rod. The lifting rod passes through the worm gear and is threadedly connected to the threaded hole provided inside it. A worm is meshed on one side of the worm gear, and the adjusting unit drives the worm to rotate.

[0008] Preferably, a connecting rod is fixedly installed on one side of the vertical rod, and the connecting rod is inserted into the interior of both sides of the horizontal rod.

[0009] Preferably, the adjustment unit includes a fixed rod for driving the worm gear to rotate, and the fixed rods on both sides are movably installed inside the telescopic rod set in the middle. A bevel gear one is fixedly installed in the middle of the telescopic rod, and a bevel gear two is meshed at the lower end of the bevel gear one. A throttle handle is fixedly installed at the lower end of the bevel gear two.

[0010] Preferably, an extension rod is movably installed on the inner side of the transverse rod. The extension rod is movably installed inside the transverse rod and fixed by a connecting bolt movably installed at its upper end.

[0011] Preferably, the upper end of the transverse rod is provided with a movable hook, which is movably installed inside a mounting button fixedly installed on one side of the transverse rod and is threadedly connected to the mounting button.

[0012] Preferably, both sides of the fixed rod and the extension rod are provided with limit grooves, which are respectively matched and installed with limit buttons provided on the inner side of the telescopic rod and the transverse rod.

[0013] Preferably, the lifting rod has an arc-shaped groove on its side, and a limiting part is movably installed inside the arc-shaped groove.

[0014] Preferably, the limiting part includes a rotating wheel installed inside the arc-shaped groove, the rotating wheel being installed by a fixing frame, the fixing frame being installed inside the inner cavity of the vertical rod.

[0015] Preferably, four sets of arc-shaped slots and limiting parts are provided and are evenly arranged on the inner side of the vertical rod.

[0016] This utility model provides a motorhome extension support structure. By setting a transverse bar in the middle of the vertical bar, a rectangular frame support structure is formed, which effectively enhances the rigidity and stability of the overall support structure. The transverse bar not only provides lateral connection and support to the vertical bars on both sides, preventing them from bending or becoming unstable under stress, but also significantly improves the load-bearing capacity and deformation resistance of the entire support system for the extension box, ensuring the safety and reliability of the motorhome during the extension process and in use. The connecting feet set on the side of the transverse bar can directly connect the transverse bar to the extension box, so that the weight of the extension box and the external load can be effectively transferred to the transverse bar through the connecting feet, and further borne by the vertical bars on both sides. This optimizes the force transmission path, avoids local stress concentration, and improves the firmness of the connection and the durability of the overall structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall installation structure of an embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the overall planar structure of an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the connection structure between the vertical and horizontal bars in an embodiment of this utility model.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the vertical rod according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the transmission structure of the adjustment unit in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the transverse bar structure of an embodiment of the present utility model.

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the vertical rod according to an embodiment of the present invention.

[0025] Figure descriptions: 100, vertical rod; 110, connecting rod; 120, lifting rod; 121, arc-shaped groove; 130, limiting part; 131, rotating wheel; 132, fixing frame; 140, worm gear; 141, threaded hole; 150, worm; 200, horizontal rod; 210, connecting foot; 220, extension rod; 230, connecting bolt; 240, movable hook; 241, mounting button; 300, adjusting unit; 310, throttle; 320, bevel gear one; 330, bevel gear two; 340, telescopic rod; 350, fixing rod. Detailed Implementation

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0027] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a motorhome extension support structure.

[0028] like Figures 1-7 As shown, this utility model embodiment provides a motorhome extension support structure, including a vertical rod 100 for supporting an extension box set on one side. A horizontal rod 200 is provided in the middle of the vertical rod 100 to support the vertical rods 100 on both sides. The vertical rod 100 and the horizontal rod 200 are arranged in a rectangle. A connecting foot 210 is provided on the side of the horizontal rod 200 for connecting the horizontal rod 200 and the extension box. An adjustment unit 300 is provided at the lower end of the horizontal rod 200 for lowering and supporting the vertical rod 100.

[0029] By setting a transverse bar 200 in the middle of the vertical bar 100, a rectangular frame support structure is formed, which effectively enhances the rigidity and stability of the overall support structure. The transverse bar 200 not only provides lateral connection and support to the two vertical bars 100, preventing them from bending or becoming unstable under stress, but also significantly improves the load-bearing capacity and deformation resistance of the entire support system for the expansion box, ensuring the safety and reliability of the RV during expansion and use. The connecting feet 210 set on the side of the transverse bar 200 can directly connect the transverse bar 200 to the expansion box, so that the weight of the expansion box and the external load are effectively transferred to the transverse bar 200 through the connecting feet 210, and further borne by the two vertical bars 100. This optimizes the force transmission path, avoids local stress concentration, and improves the firmness of the connection and the durability of the overall structure.

[0030] A lifting rod 120 for supporting the upper end is installed vertically within the inner cavity of the vertical rod 100. A worm gear 140 for driving the lifting rod 120 to move up and down is located at the lower end of the lifting rod 120. The lifting rod 120 passes through the worm gear 140 and is threadedly connected to its internal threaded hole 141. A worm 150 for driving the worm gear 140 to rotate is meshed on one side of the worm gear 140. The adjusting unit 300 drives the worm 150 to rotate. By vertically installing the lifting rod 120 within the inner cavity of the vertical rod 100 and using the worm gear 140 and worm 150 transmission mechanism to drive the lifting rod 120, precise adjustment of the support height is achieved. The rod 120 is connected by a thread, and the rotation of the worm gear 150 drives the worm wheel 140 to rotate, thereby driving the lifting rod 120 to rise and fall smoothly along the axis. The adjustment process is smooth, effectively meeting the height adaptation needs of the RV in different usage scenarios, and providing more stable support for the expansion box. The worm wheel 140 and worm gear 150 transmission have natural self-locking characteristics. When the adjustment is in place, even if external loads are applied or the vehicle vibrates, the worm wheel 140 and worm gear 150 mechanism can reliably lock the position of the lifting rod 120, preventing it from automatically sliding down or loosening due to gravity or external forces. The lifting mechanism is integrated inside the vertical rod 100, making full use of the internal space of the vertical rod 100 without occupying additional external space.

[0031] A connecting rod 110 for splicing with the horizontal rod 200 is fixedly installed on one side of the vertical rod 100. The connecting rod 110 is inserted into the interior of both sides of the horizontal rod 200 and fixed by bolts, which facilitates the connection and fixation of the vertical rod 100 and the horizontal rod 200 and makes it convenient for transportation after disassembly.

[0032] The adjustment unit 300 includes a fixed rod 350 for driving the worm gear 150 to rotate. Both fixed rods 350 are movably installed inside a telescopic rod 340 located in the middle. A bevel gear 320 for driving the telescopic rod 340 to rotate is fixedly installed in the middle of the telescopic rod 340. A bevel gear 330 for driving the bevel gear 320 to rotate is meshed at the lower end of the bevel gear 320. A throttle 310 for driving the bevel gear 330 to rotate is fixedly installed at the lower end of the bevel gear 330. The adjustment unit 300 adopts a structure design with central drive and two-sided linkage. The throttle 310... The second bevel gear 330 drives the first bevel gear 320 to rotate, which in turn drives the telescopic rod 340 to rotate, causing the fixed rods 350 at both ends to rotate synchronously. This, in turn, drives the worm gears 150 on both sides to rotate, ensuring the consistency of the support height adjustment on both sides. This avoids uneven force, tilting, or jamming of the expansion box due to asynchronous adjustment, greatly improving the stability of the support process and the structural safety. A throttle 310 is set at the lower end of the adjustment unit 300. Users only need to operate at a single point in the middle of the vehicle to complete the synchronous adjustment of the support structure on both sides, without having to manually adjust the left and right sides separately, which significantly reduces the complexity of operation and labor intensity.

[0033] An adjustable extension rod 220 is movably installed on the inner side of the transverse rod 200. The extension rod 220 is movably installed inside the transverse rod 200 and fixed by a connecting bolt 230 movably installed at the upper end. The length of the transverse rod 200 can be adjusted. After adjusting to a suitable length, it is fixed by the connecting bolt 230.

[0034] The upper end of the horizontal bar 200 is provided with a movable hook 240 for assisting in fixing the canopy equipment. The movable hook 240 is movably installed inside the mounting button 241 fixedly installed on one side of the horizontal bar 200 and is threadedly connected to the mounting button 241, which facilitates fixing the canopy after the extension box is extended, and assists in the installation.

[0035] Both sides of the fixed rod 350 and the extension rod 220 are provided with limiting grooves for limiting, and are respectively matched and installed with the limiting buttons provided on the inner side of the telescopic rod 340 and the transverse rod 200. The fixed rod 350 and the extension rod 220 are limited by the mutual engagement of the limiting grooves and the limiting buttons, so as to avoid twisting during adjustment and facilitate adjustment.

[0036] The side of the lifting rod 120 is provided with an arc-shaped slot 121 for limiting the lifting rod 120, and a limiting part 130 for matching the limiting is movably installed inside the arc-shaped slot 121.

[0037] The limiting part 130 includes a rotating wheel 131 that fits inside the arc-shaped groove 121. The rotating wheel 131 is installed by a fixing frame 132, which is installed inside the inner cavity of the vertical rod 100. When the lifting rod 120 is raised or lowered, the rotating wheel 131 moves up and down in contact with the arc-shaped groove 121, limiting the lifting rod 120 and supporting it.

[0038] Four sets of arc-shaped slots 121 and limiting parts 130 are provided and are evenly arranged on the inner side of the vertical rod 100. The even arrangement makes the lifting rod 120 bear force evenly, which facilitates the movement of the lifting rod 120.

[0039] The working principle of a motorhome extension support structure: By setting a transverse bar 200 in the middle of the vertical bar 100, a rectangular frame support structure is formed, which effectively enhances the rigidity and stability of the overall support structure. The transverse bar 200 not only provides lateral connection and support to the two vertical bars 100, preventing them from bending laterally or becoming unstable under stress, but also significantly improves the load-bearing capacity and deformation resistance of the entire support system for the extension box, ensuring the safety and reliability of the motorhome during the extension process and in use. The connecting feet 210 set on the side of the transverse bar 200 can directly connect the transverse bar 200 to the extension box, so that the weight of the extension box and the external load are effectively transferred to the transverse bar 200 through the connecting feet 210, and further borne by the two vertical bars 100. This optimizes the force transmission path, avoids local stress concentration, and improves the firmness of the connection and the durability of the overall structure.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A motorhome extension support structure, characterized in that, include: A vertical rod is provided, with a horizontal rod in the middle of the vertical rod. The vertical rod and the horizontal rod are arranged in a rectangle. A connecting foot is provided on the side of the horizontal rod, and an adjustment unit is provided at the lower end of the horizontal rod.

2. The RV extension support structure according to claim 1, characterized in that, A lifting rod is installed in the inner cavity of the vertical rod. A worm gear is provided at the lower end of the lifting rod. The lifting rod passes through the worm gear and is threadedly connected to the threaded hole provided inside it. A worm is engaged on one side of the worm gear. The adjusting unit drives the worm to rotate.

3. The RV extension support structure according to claim 2, characterized in that, A connecting rod is fixedly installed on one side of the vertical rod, and the connecting rod is inserted into the interior of both sides of the horizontal rod.

4. The RV extension support structure according to claim 3, characterized in that, The adjustment unit includes a fixed rod for driving the worm gear to rotate. The fixed rods on both sides are movably installed inside the telescopic rod in the middle. A bevel gear one is fixedly installed in the middle of the telescopic rod. A bevel gear two is meshed at the lower end of the bevel gear one. A throttle handle is fixedly installed at the lower end of the bevel gear two.

5. The RV extension support structure according to claim 4, characterized in that, An extension rod is movably installed on the inner side of the transverse rod. The extension rod is movably installed inside the transverse rod and is fixed by a connecting bolt movably installed at the upper end.

6. The RV extension support structure according to claim 5, characterized in that, The upper end of the horizontal bar is provided with a movable hook, which is movably installed inside a mounting button fixedly installed on one side of the horizontal bar and is threadedly connected to the mounting button.

7. A motorhome extension support structure according to claim 6, characterized in that, Both sides of the fixed rod and the extension rod have limit grooves, which are matched and installed with limit buttons set on the inner side of the telescopic rod and the transverse rod, respectively.

8. A motorhome extension support structure according to claim 7, characterized in that, The lifting rod has an arc-shaped groove on its side, and a limiting part is movably installed inside the arc-shaped groove.

9. A motorhome extension support structure according to claim 8, characterized in that, The limiting part includes a rotating wheel installed inside the arc-shaped groove. The rotating wheel is installed by a fixing frame, which is installed inside the inner cavity of the vertical rod.

10. A motorhome extension support structure according to claim 9, characterized in that, The arc-shaped groove and limiting part are provided in four sets and are evenly arranged on the inner side of the vertical rod.

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