An expandable new energy RV frame structure

Abstract

This application relates to an expandable new energy RV frame structure. The bottom of the expandable compartment has several receiving slots arranged along its sliding direction. Each receiving slot contains: a telescopic arm with a fixed end connected to a rotating shaft; a base hinged to the output end of the telescopic arm; a control gear rotatably mounted on the side of the expandable compartment away from the rotating shaft and connected to the rotating shaft for transmission; a control rack meshing with the control gear; when the expandable compartment extends to a first preset position, the control gear and control rack mesh; when the expandable compartment extends from the first preset position to its limit position, the control gear drives the rotating shaft to rotate, causing the telescopic arm to flip from a horizontal retracted state to a vertical support state; and a positioning sensor to detect the flipped state of the telescopic arm. When the positioning sensor detects that the telescopic arm has flipped to the vertical support state, the telescopic arm operates under control, causing the base to press against the target ground. This application allows the telescopic arm to automatically extend and retract as the expandable compartment extends and retracts, providing support for the expandable compartment.

Description

Technical Field

[0001] This application relates to the technical field of motorhomes, and in particular to an expandable new energy motorhome frame structure. Background Technology

[0002] Motorhomes, also known as "homes on wheels," combine the functions of a "house" and a "vehicle." Currently, a large portion of motorhomes are converted from light vans, primarily powered by gasoline. However, with the widespread adoption of new energy technologies in the automotive industry, mainstream new energy motorhomes on the market encompass various forms of new energy, including pure electric, plug-in hybrid, and plug-in range-extended hybrid, to meet diverse user needs. A significant difference is the addition of large battery packs to the motorhome frame, necessitating modifications to the original frame structure.

[0003] Furthermore, as users' demand for personalized customization increases, some users choose to install extension compartments on their RVs, including but not limited to single-side extensions, double-side extensions, and rearward extensions. These extension compartments can be extended after the RV is parked to increase the usable area inside the RV and improve camping comfort.

[0004] Chinese patent application CN202310403436.4, in the related technology, proposes an integrally expandable RV frame structure, including a support member connected to the longitudinal beam of the RV and used to install the floor of the RV body; an expansion member located below the floor and used to connect the expansion compartment of the RV; the expansion member can move along the length direction parallel to and / or perpendicular to the longitudinal beam, and when the expansion member moves, it drives the expansion compartment to expand outward away from the body or the expansion member drives the expansion compartment to retract inward into the body; and a drive mechanism for driving the movement of the expansion member.

[0005] For current expandable RVs, guide rails are generally installed at the bottom and sides of the expandable compartment to guide and limit its movement. The expandable compartment corresponds to areas such as seating or rear beds inside the RV. When the vehicle is parked, the movement of passengers in these areas inevitably increases the load on the guide rails on the expandable compartment. Moreover, there is currently no portable support system for the expandable compartment, which will seriously affect the stability of the guide rails, causing the expandable compartment to slide and get stuck or even fail to slide out. Summary of the Invention

[0006] To address the issue of passenger movement affecting the stability of the expansion compartment's guide rails in RVs, this application provides an expandable new energy RV frame structure.

[0007] The expandable new energy RV frame structure provided in this application adopts the following technical solution:

[0008] An expandable new energy RV frame structure includes a frame body, an expansion compartment, guide rails, and a drive mechanism for extending / retracting the expansion compartment. The bottom of the expansion compartment has several receiving slots arranged along its sliding direction, and the receiving slots contain:

[0009] The telescopic arm has a fixed end to which a rotating shaft with an axis perpendicular to the sliding direction of the expansion compartment is fixed, and the rotating shaft rotates at the free end of the expansion compartment;

[0010] The base is hinged to the output end of the telescopic arm;

[0011] The control gear is rotatably mounted on the side of the expansion compartment away from the rotating shaft and is connected to the rotating shaft for transmission.

[0012] A control rack is fixed to the main body of the vehicle frame and extends into the receiving groove. The control gear meshes with the control rack. When the extension compartment extends to the first set position, the control gear and the control rack are just engaged. When the extension compartment extends from the first set position to the limit position, the control gear drives the rotating shaft to rotate so that the telescopic arm flips from the horizontal storage state to the vertical support state.

[0013] A positioning sensor is used to detect the flipping state of the telescopic arm. When the positioning sensor detects that the telescopic arm has flipped to a vertical support state, the telescopic arm is controlled to work and the base is pressed against the target ground.

[0014] Furthermore, the base support includes:

[0015] The base plate has a mounting groove in the middle of its upper end face, and an anti-detachment ring is fixedly connected to the side wall of the mounting groove.

[0016] An elastic bladder is disposed within a mounting groove, and the elastic bladder is filled with a non-Newtonian fluid; and

[0017] The sliding plate is slidably disposed in the mounting groove and located between the elastic bladder and the anti-detachment ring. The outer diameter of the sliding plate is larger than the inner diameter of the anti-detachment ring, and the sliding plate is hinged to the output end of the telescopic arm.

[0018] Furthermore, the output end of the telescopic arm is fixedly connected to a fixed shaft perpendicular to its axis, and two lifting lugs sleeved on both ends of the fixed shaft are fixedly connected to the slide plate.

[0019] Furthermore, a positioning platform is fixed to the upper end face of the skateboard, and a positioning notch is provided on the positioning platform. A positioning block that is adapted to be inserted into the positioning notch is fixed to the outer peripheral wall of the fixed axis arc surface. The size of the ear hole on the lifting lug in the direction perpendicular to the skateboard surface is greater than the sum of the diameter of the fixed axis and the depth of the positioning notch. This allows the lifting lug to swing freely on the fixed axis when the skateboard surface is perpendicular to the axial direction of the telescopic arm. When the skateboard moves down to be in close contact with the ground, the positioning block is embedded in the positioning notch, and the fixed axis cannot swing in the lifting lug.

[0020] Furthermore, the positioning notch has an flared opening and its inner wall is provided with several recessed platforms. The positioning block is simultaneously inserted and adapted to the positioning notch and the several recessed platforms.

[0021] Furthermore, the slide plate is provided with honeycomb or mesh-like ribs on the side near the elastic bladder.

[0022] Furthermore, an arc-shaped plate adapted to the free end sidewall of the fixed end of the telescopic arm is provided on the side of the base plate away from the guide rail, and a first magnetic attraction component is provided between the free end sidewall of the fixed end of the telescopic arm and the inner arc side of the arc-shaped plate.

[0023] Furthermore, the bottom of the expansion compartment is provided with a slot that communicates with the receiving groove. When the telescopic arm retracts to its limit position and flips to be embedded in the receiving groove, the bottom support plate is embedded in the slot, and a second magnetic attraction component is provided between the bottom support plate and the bottom wall of the slot.

[0024] Furthermore, the first magnetic attraction component and the second magnetic attraction component are two sets of permanent magnets that attract each other magnetically, or a set of permanent magnets and a set of ferromagnetic components.

[0025] Furthermore, the expansion compartment is rotatably equipped with a reversing gear that meshes with the control gear in the receiving slot. A reversing shaft is coaxially fixed to the reversing gear, and the reversing shaft is connected to the rotating shaft for synchronous transmission.

[0026] In summary, the beneficial technical effects of this application are as follows:

[0027] 1. By installing reversing gears, speed regulating gears, and control gears in the receiving slot of the expansion compartment, and installing a control rack in a set position on the main body of the frame, when the expansion compartment extends to the point where the telescopic arm is just exposed, the telescopic arm can automatically open into a vertical support state as the expansion compartment continues to extend; and when the expansion compartment retracts, the telescopic arm automatically flips into a horizontal storage state. There is no need to install a separate drive component, which can effectively save energy, reduce the impact on the range of new energy RVs, and this setting has less intrusion into the space of the expansion compartment, higher space utilization, and better protection of the guide rails.

[0028] 2. By setting an elastic bladder filled with non-Newtonian fluid in the mounting groove of the base plate, a smart support combining rigidity and flexibility can be formed between the telescopic arm and the base plate. Specifically, when the extended compartment is loaded and slowly sinks, the non-Newtonian fluid in the elastic bladder is compressed, exhibiting a soft and easily deformable state to form a viscoelastic support layer. When the vehicle is subjected to continuous shaking by external forces, the external force is quickly applied to the elastic bladder through the telescopic arm, and the non-Newtonian fluid in the elastic bladder hardens instantly, absorbing and dispersing the impact energy, which can achieve a certain buffering and damping effect, suppress the shaking of the extended compartment and improve the stability of the extended compartment, effectively improving the continuous shaking phenomenon of conventional flexible supports.

[0029] 3. By setting the lug's ear hole as an oval hole, fixing a positioning block on the fixed axis at the output end of the telescopic arm, and fixing a positioning platform with a positioning notch on the slide plate, the base support can be freely flipped and stored on the telescopic arm when it is not under load. When the telescopic arm is flipped to the vertical support state and the base support is pressed against the support surface, the fixed axis on the telescopic arm slides to the end in the lug's ear hole, and the positioning block on it is embedded in the positioning notch on the positioning platform. This can effectively limit the deflection angle of the telescopic arm on the base support, thereby preventing the telescopic arm and the base support from deflecting each other when supporting the expansion compartment, which would cause the required rigid support to fail.

[0030] 4. By setting the first magnetic suction component and the second magnetic suction component, the base can be automatically stored and unfolded on the telescopic arm, and the telescopic arm can be conveniently locked and unlocked in the receiving slot. No additional control structure is required, making it easier to maintain and with low maintenance costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0033] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0034] Figure 4 This is a cross-sectional view of the expansion compartment of this application embodiment when it is extended to the first set position and the telescopic arm is in a horizontally retracted state.

[0035] Figure 5 yes Figure 1 A magnified view of part B in the middle section;

[0036] Figure 6 This is a schematic diagram of the structure of the telescopic arm in an embodiment of this application, which has just been flipped to the vertical support state and the base is in the storage state.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Main frame; 11. Extension compartment; 111. Receiving slot; 112. Card slot;

[0039] 2. Telescopic boom; 21. Rotary shaft; 22. Fixed shaft; 221. Positioning block;

[0040] 3. Base support; 31. Base plate; 311. Mounting groove; 312. Anti-detachment ring; 32. Elastic bladder; 33. Slide plate; 331. Lifting lug; 3311. Ear hole; 332. Positioning platform; 3321. Positioning notch; 3322. Recessed platform;

[0041] 41. Control gear; 42. Control rack; 43. Reversing gear; 44. Reversing shaft; 45. Speed ​​regulating gear;

[0042] 5. Curved plate. Detailed Implementation

[0043] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] This application discloses an expandable new energy vehicle frame structure. (Refer to...) Figure 1 It includes a frame body 1, an extension compartment 11, guide rails, and a drive mechanism for extending / retracting the extension compartment 11. The guide rail structure and drive mechanism are existing technologies, which can be easily implemented by those skilled in the art and require no further explanation.

[0045] The bottom of the expansion compartment 11 is provided with several receiving slots 111 arranged along its sliding direction. For example, for a small expansion compartment 11, only one receiving slot 111 needs to be set in the center; while for a large expansion compartment 11, receiving slots 111 can be set at the bottom of both ends of the expansion compartment 11. In this embodiment of the application, one receiving slot 111 is set as an example.

[0046] The receiving slot 111 is provided with:

[0047] The telescopic arm 2 has a fixed end to a rotating shaft 21 whose axis is perpendicular to the sliding direction of the expansion compartment 11. The rotating shaft 21 rotates at the free end of the expansion compartment 11. The telescopic arm 2 can be an electric push rod, especially an electric push rod with a self-locking function, or it can be a hydraulic cylinder, pneumatic cylinder, etc., depending on the energy type that can be configured on the new energy RV. It should be noted that the fixed end of the telescopic arm 2 refers to the cylinder body, and the output end refers to the piston rod.

[0048] The base 3 is hinged to the output end of the telescopic arm 2 and is used to support the ground.

[0049] The control gear 41 is rotatably mounted on the side of the expansion compartment 11 away from the rotating shaft 21 and is connected to the rotating shaft 21 for transmission.

[0050] The control rack 42 is fixed to the frame body 1 and extends into the receiving groove 111. The control gear 41 and the control rack 42 mesh and match. When the extension compartment 11 extends to the first set position, the control gear 41 and the control rack 42 just mesh and connect. At this time, the bottom support 3 on the output end of the telescopic arm 2, which is in the retraction limit state, is exposed on the side of the frame body 1. When the extension compartment 11 extends from the first set position to the limit position, the control gear 41 drives the rotating shaft 21 to rotate so that the telescopic arm 2 flips from the horizontal storage state to the vertical support state. Specifically, the expansion compartment 11 is rotatably mounted with a reversing gear 43 in the receiving slot 111. A reversing shaft 44 is coaxially fixed to the reversing gear 43. One end of the reversing shaft 44 is connected to the rotating shaft 21 in a synchronous transmission. Specifically, it can be connected by chain and sprocket transmission or by synchronous belt and synchronous pulley transmission. One end of the control gear 41 is coaxially fixed to a speed regulating gear 45 that meshes with the reversing gear 43. The reversing gear 43 is connected to the control gear 41 through the speed regulating gear 45. The speed regulating gear 45 is used to drive the reversing gear 43 to rotate exactly 90° when the control gear 41 moves a set length on the control rack 42, so that the telescopic arm 2 flips from a horizontal state to a vertical state. The speed regulating gear 45 can be a reduction gear or a speed increasing gear. In this embodiment, for ease of demonstration, the speed regulating gear 45 is set as a reduction gear.

[0051] A positioning sensor is used to detect the flipping state of the telescopic arm 2. When the positioning sensor detects that the telescopic arm 2 has flipped to the vertical support state, the telescopic arm 2 is controlled to operate and press the base 3 against the target ground. Specifically, the positioning sensor can be an angle sensor, installed on the extension compartment 11, and used to monitor the rotation angle of the pivot 21. In specific settings, the value detected by the positioning sensor when the telescopic arm 2 is flipped to the horizontal retracted state is set to 0°, at which point the telescopic arm 2 is in the horizontal retracted state; the value detected by the positioning sensor when the telescopic arm 2 is flipped to the vertical support state is set to 90°, at which point the telescopic arm 2 is in the vertical support state.

[0052] Therefore, when the RV of this application is parked, and the extension compartment 11 extends out of the frame body 1 under the drive of the drive mechanism, when the extension compartment 11 extends to the first position, the control gear 41 in the receiving groove 111 on the extension compartment 11 is just engaged with the control rack 42 on the frame body 1, and the bottom support 3 on the output end of the telescopic arm 2, which is in the retraction limit state at this time, is also exposed on the side of the frame body 1. As the extension compartment 11 continues to extend, the control gear 41 rotates on the extension compartment 11 under the engagement of the control rack 42, and the rotational motion is decelerated and transmitted to the reversing gear 43 through the speed regulating gear 45. When the reversing gear 43 rotates in the reverse direction, it drives the rotating shaft 21 connected to it to rotate in the reverse direction, thereby driving the telescopic arm 2 to flip away from the frame body 1 on the extension compartment 11. Until the extension compartment 11 extends to the limit position, the telescopic arm 2 also flips to the vertical state. Thus, the telescopic arm 2 can be automatically flipped at a fixed point during the extension of the extension compartment 11, and there is no mutual interference between the two.

[0053] Subsequently, the positioning sensor detects that the telescopic arm 2 has flipped into a vertical support state. The telescopic arm 2 is started under control, and its output end drives the base support 3 to move down until the base support 3 is stably pressed against the support surface. This can provide stable support for the part of the expansion compartment 11 that extends outside the frame body 1. Even if the occupants in the expansion compartment 11 move around, it will not cause excessive load on the guide rail between the expansion compartment 11 and the frame body 1, thus ensuring the stability of the guide rail.

[0054] When the expansion compartment 11 needs to be retracted, the telescopic arm 2 is first controlled to work so that its output end drives the base 3 to retract to its limit position. Then, when the drive mechanism drives the expansion compartment 11 to retract, the telescopic arm 2, with the cooperation of the reversing gear 43, the control gear 41, the control rack 42 and other structures, simultaneously flips towards the direction of the expansion compartment 11 until the telescopic arm 2 flips into the receiving slot 111 and enters the horizontal storage state. Then the expansion compartment 11 continues to retract until it is completely stored in the frame body 1. The telescopic arm 2 can be automatically flipped during the retraction of the expansion compartment 11, and there is no mutual interference between the two.

[0055] Therefore, by setting up the above scheme, the telescopic arm 2 can be automatically flipped during the extension and retraction of the expansion compartment 11. That is, when the expansion compartment 11 is extended, the telescopic arm 2 automatically enters the vertical support state, and when the expansion compartment 11 is retracted, the telescopic arm 2 automatically enters the horizontal storage state. There is no need to install a separate drive component, which can effectively save energy and reduce the impact on the range of new energy RVs. Furthermore, the relevant structures in the above scheme are basically housed in the receiving slot 111, which can also correspond to the card seat in the expansion compartment 11. This minimizes the intrusion into the space of the expansion compartment 11, increases the space utilization rate, and better protects the guide rails used for sliding of the expansion compartment 11.

[0056] However, considering that the compression of the suspension on the RV is different when it is unloaded and loaded, when the occupants move in the extension compartment 11, it will inevitably cause the suspension of the main frame 1 to sink. At this time, the rigid support of the telescopic arm 2 will still cause poor coordination between the extension compartment 11 and the main frame 1. If a conventional combination of rigid and flexible support is used, when the vehicle shakes (such as when the occupants jump or when crosswinds blow), this flexible support can only reduce the shaking, but cannot suppress the continuous shaking of the vehicle and provide stable support.

[0057] Therefore, this application further specifies that the base support 3 includes:

[0058] The bottom support plate 31 has an installation groove 311 in the middle of its upper end face, and an anti-detachment ring 312 is fixedly connected to the side wall of the groove opening of the installation groove 311.

[0059] An elastic bladder 32 is disposed in the mounting groove 311, and the elastic bladder 32 is filled with a non-Newtonian fluid, which may specifically be a corn starch-based fluid.

[0060] The slide plate 33 is slidably disposed in the mounting groove 311 and located between the elastic bladder 32 and the anti-detachment ring 312. The outer diameter of the slide plate 33 is larger than the inner diameter of the anti-detachment ring 312. The slide plate 33 is hinged to the output end of the telescopic arm 2. Specifically, the slide plate 33 is provided with honeycomb or grid-like ribs on the side near the elastic bladder 32.

[0061] Therefore, by placing an elastic bladder 32 filled with non-Newtonian fluid between the base plate 31 and the telescopic arm 2, when the load in the expansion compartment 11 causes the suspension to sink, the non-Newtonian fluid in the elastic bladder 32 can be compressed in the mounting groove 311, exhibiting a soft and easily deformable state to form a viscoelastic support layer. This layer can better conform to the contact surfaces of the mounting groove 311 and the sliding plate 33, achieving uniform static support. When the vehicle is subjected to continuous shaking by external forces, the external force is quickly applied to the elastic bladder 32 through the telescopic arm 2. The non-Newtonian fluid in the elastic bladder 32 hardens instantly, absorbing and dispersing the impact energy, achieving a certain buffering and damping effect, suppressing the shaking of the expansion compartment 11 and improving its stability. This effectively improves the continuous shaking phenomenon of conventional flexible supports. Thus, a "rigid-flexible" intelligent support is achieved, which can significantly improve the safety and comfort of the expansion compartment 11.

[0062] In addition, in order to improve the stability of the base support 3 when supporting the telescopic arm 2, a fixed shaft 22 perpendicular to its axis is fixedly connected to the output end of the telescopic arm 2, and two lifting lugs 331 sleeved on both ends of the fixed shaft 22 are fixedly connected to the slide plate 33. A positioning platform 332 is fixedly connected to the upper end face of the slide plate 33. A positioning notch 3321 is provided on the positioning platform 332. A positioning block 221 that is compatible with the positioning notch 3321 is fixedly connected to the outer peripheral wall of the arc surface of the fixed shaft 22. The ear hole 3311 on the lifting lug 331 has a size in the direction perpendicular to the surface of the slide plate 33 that is greater than the sum of the diameter of the fixed shaft 22 and the depth of the positioning notch 3321. For example, the ear hole 3311 on the lifting lug 331 is an oval hole. When the surface of the slide plate 33 is perpendicular to the axis of the telescopic arm 2, the lifting lug 331 can swing freely on the fixed shaft 22. When the slide plate 33 moves down to be in close contact with the ground, the positioning block 221 is embedded in the positioning notch 3321, and the fixed shaft 22 cannot swing in the lifting lug 331.

[0063] Therefore, when the telescopic arm 2 is flipped, the slide plate 33 is suspended on the fixed axis 22 of the telescopic arm 2 through the lifting lug 331 on it. The base support 3 can be freely flipped on the fixed axis 22 with the help of the slide plate 33, without interfering with the storage of the base plate. When the telescopic arm 2 is flipped to the vertical support state and the base support 3 is pressed tightly against the support surface, the fixed axis 22 on the telescopic arm 2 slides to the end in the ear hole 3311 on the lifting lug 331, and the positioning block 221 on it is embedded into the positioning notch 3321 on the positioning platform 332. This can effectively limit the deflection angle of the telescopic arm 2 on the base support 3, thereby avoiding the deflection between the telescopic arm 2 and the base support 3 when supporting the expansion compartment 11, which would cause the required rigid support to fail.

[0064] Furthermore, the opening of the positioning notch 3321 is flared, and its inner wall is provided with several recessed platforms 3322. The positioning block 221 is simultaneously inserted and fitted into the positioning notch 3321 and the several recessed platforms 3322. Thus, the flared positioning notch 3321 facilitates the positioning block 221 to be more accurately inserted into the positioning notch 3321 after the telescopic arm 2 is flipped to the vertical support state, avoiding jamming; while the setting of several recessed platforms 3322 further reduces the possibility of the positioning block 221 deflecting on the positioning platform 332, thereby improving the stability and accuracy when the base support 3 and the telescopic arm 2 are combined for support.

[0065] In addition, to achieve automatic deployment and retraction of the base plate 3 on the telescopic arm 2, an arc-shaped plate 5 is provided on the side of the base plate 31 away from the guide rail, which is adapted to the free end sidewall of the fixed end of the telescopic arm 2. A first magnetic attraction component is provided between the free end sidewall of the fixed end of the telescopic arm 2 and the inner arc side of the arc-shaped plate 5. The bottom of the expansion compartment 11 is provided with a slot 112 that communicates with the receiving groove 111. When the telescopic arm 2 retracts to its limit position and flips to be embedded in the receiving groove 111, the base plate 31 is embedded in the slot 112. A second magnetic attraction component is provided between the base plate 31 and the bottom wall of the slot 112.

[0066] The first and second magnetic assemblies are two sets of permanent magnets that attract each other, or one set of permanent magnets and one set of ferromagnetic components. In this embodiment, both the first and second magnetic assemblies consist of two sets of permanent magnets to improve the stability of the base 3 when stored on the telescopic arm 2.

[0067] Therefore, when the telescopic arm 2 flips from its horizontal retracted state to its vertical support state, the first step in flipping the telescopic arm 2 is to overcome the magnetic attraction force in the second magnetic attraction assembly so that the base plate 31 can detach from the bottom of the expansion compartment 11. The energy to overcome this magnetic attraction force comes from the driving force of the drive mechanism on the expansion compartment 11, ensuring that the telescopic arm 2 can flip and unfold smoothly. Subsequently, as the telescopic arm 2 drives the base 3 to move down and press against the support surface in the vertical support state, the arc-shaped plate 5 on the base plate 31 slides on the cylinder of the telescopic arm 2 until the arc-shaped plate 5 is completely away from the cylinder of the telescopic arm 2. At this point, the magnetic attraction force between the arc-shaped plate 5 and the cylinder of the telescopic arm 2 is lost, and the base plate 31 can flip to a horizontal position on the piston rod of the telescopic arm 2 to contact the support surface. Therefore, the automatic unfolding of the base 3 on the telescopic arm 2 can be achieved.

[0068] Similarly, when the telescopic arm 2 flips from the vertical support state to the horizontal storage state, the telescopic arm 2 first drives its piston rod to retract to the limit position, and then the telescopic arm 2 flips to the horizontal storage state. The bottom support plate 31 gradually flips on the fixed axis 22 on the telescopic arm 2 until the arc plate 5 on it is magnetically attached to the cylinder of the telescopic arm 2. At this time, the bottom support 3 is stored on the telescopic arm 2. At the same time, the magnetic attraction force of the second magnetic attraction component between the bottom support plate 31 and the bottom wall of the slot 112 further magnetically fixes the bottom support plate 31 to the bottom of the expansion compartment 11, which can realize the fixation of the telescopic arm 2.

[0069] In addition, it should be clearly stated that although the telescopic arm 2, the base support 3, the control gear 41, and the control rack 42 are all located in the receiving groove 111, the two modules are staggered in the receiving groove 111. Specifically, when the telescopic arm 2 is in the horizontal retracted state and the base plate 31 on the base support 3 is magnetically attracted in the slot 112, the base plate 31 and the rack are arranged at intervals along the width of the receiving groove 111 to ensure that the two do not interfere with each other during the extension and retraction of the expansion compartment 11.

[0070] Furthermore, to prevent the telescopic arm 2 from losing its locking function in the horizontally retracted state due to shaking during the RV's operation, in another feasible embodiment, a limiting member can be fixed at the location of the frame body 1 corresponding to the receiving groove 111. The limiting member can be a limiting block or a limiting wheel. When the telescopic arm 2 is flipped to the horizontally retracted state and the bottom support plate 31 is magnetically attracted to the bottom of the expansion compartment 11, the limiting member contacts the lower end face of the bottom support plate 31. Specifically, when the expansion compartment 11 is completely retracted into the frame body 1, the limiting member presses the bottom support plate 31 tightly against the bottom wall of the expansion compartment 11, and the limiting member is embedded in the frame body 1.

[0071] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0072] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An expandable new energy recreational vehicle frame structure, comprising a frame body, an expansion cabin, a guide rail and a driving mechanism for driving the expansion cabin to extend / retract, characterized in that, The bottom of the expansion cabin is provided with a plurality of containing grooves arranged along the sliding direction of the expansion cabin, and the containing grooves are provided with: a telescopic arm, a fixed end of which is fixedly connected with a rotating shaft whose axis is perpendicular to the sliding direction of the expansion cabin, and the rotating shaft rotates at the free end of the expansion cabin; a bottom support base hinged to the output end of the telescopic arm; a control gear rotatably installed on the side of the expansion cabin away from the rotating shaft and in transmission connection with the rotating shaft; a control rack fixedly connected to the main body of the vehicle frame and extending into the containing groove, the control gear and the control rack being in meshing and fitting, the control gear and the control rack being just in meshing and fitting connection when the expansion cabin is extended to the first set position, the control gear driving the rotating shaft to rotate to make the telescopic arm turn from the horizontal storage state to the vertical support state when the expansion cabin is extended from the first set position to the limit position; a position sensor for detecting the turning state of the telescopic arm, the telescopic arm being controlled to work and making the bottom support base abut against the target ground when the position sensor detects that the telescopic arm is turned to the vertical support state; the bottom support base comprising: a bottom support plate, a middle part of the upper end face of which is provided with a mounting groove, and a side wall of the mounting groove is fixedly connected with an anti-falling ring; a flexible bag provided in the mounting groove, and the flexible bag is filled with a non-Newtonian fluid; and a sliding plate slidingly arranged in the mounting groove and located between the flexible bag and the anti-falling ring, the outer diameter of the sliding plate being greater than the inner diameter of the anti-falling ring, and the sliding plate being hinged to the output end of the telescopic arm; the output end of the telescopic arm being fixedly connected with a fixed shaft axially perpendicular to the telescopic arm, and two lifting lugs being fixedly connected to the sliding plate and sleeved on both ends of the fixed shaft; a positioning table being fixedly connected to the upper end face of the sliding plate, the positioning table being provided with a positioning aperture, an arc surface outer circumferential wall of the fixed shaft being fixedly connected with a positioning block in plug-in fitting with the positioning aperture, and the size of the ear hole of the lifting lug in the direction perpendicular to the plate face of the sliding plate being greater than the sum of the diameter of the fixed shaft and the depth of the positioning aperture; so that when the plate face of the sliding plate is perpendicular to the axial direction of the telescopic arm, the lifting lug can freely swing on the fixed shaft, and when the sliding plate moves downward to be closely attached to the ground, the positioning block is embedded in the positioning aperture, and the fixed shaft cannot swing in the lifting lug.

2. The expandable new energy recreational vehicle frame structure according to claim 1, characterized in that, the opening end of the positioning aperture being in flared shape, and the inner wall thereof being provided with a plurality of sunken tables, the positioning block being in plug-in fitting with the positioning aperture and the plurality of sunken tables at the same time.

3. The expandable new energy recreational vehicle frame structure of claim 1, wherein, a side of the sliding plate close to the flexible bag being provided with honeycomb-shaped or grid-shaped ribs.

4. The expandable new energy recreational vehicle frame structure of claim 1, wherein, an arc-shaped plate being provided on the side of the bottom support plate away from the guide rail and in fitting with the free end side wall of the fixed end of the telescopic arm, and a first magnetic attraction assembly being provided between the free end side wall of the fixed end of the telescopic arm and the inner arc side of the arc-shaped plate.

5. The expandable new energy recreational vehicle frame structure according to claim 4, characterized in that, the bottom of the expansion cabin being provided with a clamping groove in communication with the containing groove, the bottom support plate being embedded in the clamping groove when the telescopic arm is retracted to the limit position and turned to be embedded in the containing groove, and a second magnetic attraction assembly being provided between the bottom support plate and the bottom wall of the clamping groove.

6. The expandable new energy recreational vehicle frame structure according to claim 5, characterized in that, the first magnetic attraction assembly and the second magnetic attraction assembly being two groups of permanent magnets with magnetic attraction or one group of permanent magnets and one group of ferromagnetic pieces.

7. The expandable new energy recreational vehicle frame structure of claim 1, wherein, the expansion cabin being rotatably provided with a reversing gear in meshing and fitting connection with the control gear in the containing groove, a reversing shaft being coaxially fixedly connected to the reversing gear, and the reversing shaft being in driving connection with the rotating shaft. the first magnetic attraction assembly and the second magnetic attraction assembly being two groups of permanent magnets with magnetic attraction or one group of permanent magnets and one group of ferromagnetic pieces.

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