Large-scale space expansion structure of motor home

Abstract

The utility model relates to the technical field of limo expansion structures, in particular to a limo large-scale space expansion structure which comprises a limo body assembly, the limo body assembly comprises a carriage part composed of a carriage bottom plate, a carriage beam frame and a carriage top plate, and an expansion carriage I, an expansion carriage II and an expansion carriage III are movably installed on the carriage part. The expanding carriage III comprises a mounting bottom plate, a shielding top plate, a folding wall plate and a side plate, the mounting bottom plate is fixedly mounted on the carriage part, the folding wall plate and the mounting bottom plate are rotatably mounted, the side plate is rotatably mounted on the shielding top plate, and an expanding assembly used for supporting and unfolding the folding wall plate to form a third expanding space is mounted on the shielding top plate; according to the utility model, the three expansion carriages are arranged, so that the motor home has a huge expansion ratio, 2-2.5 times of expansion can be easily realized when the motor home is expanded, the use space in the carriages is greatly increased, and the convenience and comfort of travel life are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of RV expansion structure technology, specifically to an RV with a large-scale space expansion structure. Background Technology

[0002] The configuration of a motorhome is usually customized based on the structure and size of its cabin. Whether it is a large or small motorhome, it needs to be equipped with some basic infrastructure, such as catering equipment, toilet, bedroom (or bed), water heater, air conditioner, refrigerator, and water and gas piping systems. At the same time, a certain amount of living space needs to be reserved. However, these infrastructures will take up most of the space in the motorhome, especially for motorhomes with limited space, the available living space will be greatly compressed. As a mobile travel "house", an overly compact space not only limits the enjoyment of travel, but may also bring inconvenience and troubles to life.

[0003] To overcome the technical shortcomings of existing RV expansion structures, such as small expansion ratio, low space utilization, poor ease of use, insufficient availability in all states, and unsatisfactory user experience, this paper provides a large-proportion RV space expansion structure that has a large expansion ratio, simple structure, convenient operation, and can be used normally in both open and closed states. Utility Model Content

[0004] The purpose of this invention is to provide a large-scale space expansion structure for motorhomes to solve the above-mentioned problems.

[0005] This utility model is achieved through the following technical solution:

[0006] A large-scale space expansion structure for a motorhome includes a vehicle body assembly. The vehicle body assembly includes a transport section consisting of a vehicle body and a frame, and a cargo compartment consisting of a cargo compartment floor, cargo compartment beams, and a cargo compartment roof. Three expansion compartments (I, II, and III) are movably mounted on the cargo compartment. Expansion compartment I includes an expansion box I slidably mounted on the cargo compartment, and a support component I for assisting in forming a first expansion space is mounted on the expansion box I. Expansion compartment II includes an expansion box II slidably mounted on the cargo compartment, and a support component II for assisting in forming a second expansion space is mounted on the expansion box II. Expansion compartment III includes a mounting base plate, a shielding roof plate, folding wall panels, and side panels. The mounting base plate is fixedly mounted on the cargo compartment. The folding wall panels are rotatably mounted to the mounting base plate, and the shielding roof plate is rotatably mounted on the folding wall panels. The side panels are rotatably mounted on the shielding roof plate, and an extension component for supporting the unfolded folding wall panels to form a third expansion space is mounted on the shielding roof plate.

[0007] Preferably, the support assembly I includes a side flap, a retractable connecting rod, a latch, a slide rail wheel, and an unfolding hydraulic cylinder. The side flap is rotatably mounted to the carriage section. The first end of the retractable connecting rod is hinged to the carriage section, and the second end of the retractable connecting rod is hinged to the side flap for support after the side flap is deflected. The latch is fixedly mounted on the side flap for locking the side flap to the carriage section when the side flap is closed. The side flap is also provided with a guide rail groove. The slide rail wheel is fixedly mounted on the bottom of the expansion box I and cooperates with the guide rail groove of the side flap to unfold the expansion box I. The unfolding hydraulic cylinder is fixedly mounted on the carriage section for pushing the side flap to flatten.

[0008] Preferably, a cable mounting chain II for installing cables is fixedly installed on the expansion box I, the first end of the cable mounting chain II is fixedly installed to the roof of the carriage, and the second end of the cable mounting chain II is fixedly installed to the expansion box I.

[0009] Preferably, the support component II includes a plurality of telescopic hydraulic cylinders fixedly mounted on the frame. The linear array of telescopic hydraulic cylinders on the frame is used to expand and retract the mounting slot. The fixed end of the telescopic hydraulic cylinder is fixedly mounted to the frame, and the extended end of the telescopic hydraulic cylinder is fixedly mounted to the expansion box II.

[0010] Preferably, an installation gap is formed between multiple arrayed telescopic hydraulic cylinders, and a series water tank system for water storage is fixedly installed between the installation gaps.

[0011] Preferably, a cable mounting chain I for installing cables is fixedly installed on the expansion box II, with the first end of the cable mounting chain I fixedly installed to the roof of the carriage and the second end of the cable mounting chain I fixedly installed to the expansion box II.

[0012] Preferably, an additional frame for installing additional electrical appliances is fixedly installed on the expansion box II, and the additional frame is engaged with the transport section when the expansion box II is retracted.

[0013] Preferably, the extension assembly includes a supporting hydraulic cylinder, a connecting slide rod I, a connecting slide rod II, a sliding seat, and a fixing rod. A mounting slide rod is fixedly installed on the shielding top plate, and a mounting seat is fixedly installed on the shielding top plate mounting slide rod. The fixing rod is fixedly installed on the mounting base plate. The first end of the connecting slide rod I is hinged to the fixing rod, and the second end of the connecting slide rod I is hinged to the mounting seat on the shielding top plate mounting slide rod. The sliding seat is slidably installed on the fixing rod. The first end of the connecting slide rod II is hinged to the sliding seat, and the second end of the connecting slide rod II is hinged to the shielding top plate mounting slide rod. The connecting slide rod II and the connecting slide rod I are rotatably mounted. The fixed end of the supporting hydraulic cylinder is hinged to the connecting slide rod I, and the extended end of the supporting hydraulic cylinder is hinged to the connecting slide rod II for unfolding the shielding top plate.

[0014] Preferably, the expandable compartment III further includes a connecting compartment fixedly installed on the vehicle body. The connecting compartment is provided with a shelf for placing miscellaneous items. The connecting compartment is also equipped with a ladder II for connecting the interior space of the RV. The expandable compartment III also includes an extension hydraulic cylinder fixedly installed on the mounting base plate. An open-air expansion platform is fixedly installed on the extended end of the extension hydraulic cylinder. The open-air expansion platform is slidably installed with the mounting base plate.

[0015] Preferably, the carriage section is also movably equipped with a hydraulic tailgate for assisting in the transfer of transported goods.

[0016] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0017] 1. This utility model features three expandable compartments with a huge expansion ratio, allowing the RV to easily expand by 2-2.5 times, significantly increasing the usable space inside the compartments and greatly improving the convenience and comfort of travel.

[0018] 2. The furniture, appliances, and water circulation system of this utility model are all pre-installed on the expansion carriage. Stable water and electricity transmission is achieved through the cooperation of linear guide rails and cable hooks, so that the furniture, appliances, and water circulation system can be used normally whether in the expansion or retracted state, making it highly practical.

[0019] 3. The extended carriage Ⅲ of this utility model is extended by connecting slide rod Ⅰ and connecting slide rod Ⅱ in conjunction with the supporting hydraulic cylinder. When retracted, it can be completely hidden. While ensuring the integrity of the whole, it avoids the risk of water entering the carriage due to drilling holes in the roof of the carriage when installing traditional hydraulic cylinders. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a front view schematic diagram of the present utility model;

[0022] Figure 2 This is a rear view schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the extended form of the present utility model;

[0024] Figure 4 This is a schematic diagram of the unfolded configuration of the extended carriage I of this utility model.

[0025] Figure 5 This utility model Figure 4 Schematic diagram of the structure at point A in the middle;

[0026] Figure 6 This is a schematic diagram of the installation structure at the slide rail wheel of this utility model;

[0027] Figure 7 This is a schematic diagram of the unfolded structure of the extended carriage II of this utility model;

[0028] Figure 8 This is a schematic diagram of the unfolded configuration of the extended carriage III of this utility model;

[0029] Figure 9 This is a schematic diagram of the folded wall panel and side panel of this utility model in their folded state.

[0030] The attached diagram shows the markings and corresponding component names:

[0031] 1-Car body assembly; 2-Extended carriage I; 3-Extended carriage II; 4-Extended carriage III; 5-Cable installation chain I; 6-Cable installation chain II; 7-Series water tank system; 101-Car body; 102-Car frame; 103-Carriage floor; 104-Carriage beam frame; 105-Tail plate; 106-Carriage roof; 107-Slide rail groove; 108-Hydraulic outrigger; 109-Hydraulic tail plate; 110-Lifting hydraulic cylinder; 111-Adjusting hydraulic cylinder; 201-Side tilting plate; 202-Retracting linkage; 203-Extended carriage I; 204-Window; 205- 206-Lock; 207-Expanding hydraulic cylinder; 301-Extending box II; 302-Telescopic hydraulic cylinder; 303-Mounting slot; 304-Additional frame; 305-Ladder I; 401-Mounting base plate; 402-Sheltering top plate; 403-Supporting hydraulic cylinder; 404-Connecting slide rod I; 405-Connecting slide rod II; 406-Sliding seat; 407-Fixing rod; 408-Folding wall panel; 409-Connecting compartment; 410-Placement rack; 411-Ladder II; 412-Side panel; 413-Extending hydraulic cylinder; 414-Open-air extension platform. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are for explaining the utility model only and are not intended to limit the utility model. It should be noted that this utility model is already in the actual research and development stage.

[0033] Example 1

[0034] like Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, a large-scale space expansion structure for a motorhome includes a vehicle body assembly 1. The vehicle body assembly 1 includes a transport section composed of a vehicle body 101 and a frame 102, and a carriage section composed of a carriage floor 103, a carriage beam frame 104, and a carriage roof 106. Extendable carriages I2, II3, and III4 are movably installed on the carriage section. Extendable carriage I2 includes an extendable box I203 slidably installed on the carriage section, and a support component I for assisting in supporting the extendable box I203 to form a first extended space is installed on the extendable box I203. Extendable carriage II3 includes an extendable box I203 slidably installed on the carriage section. The expansion box II 301 is mounted on the upper part of the carriage. The expansion box II 301 is equipped with a support component II for assisting in supporting the expansion box II 301 to form a second expansion space. The expansion carriage III 4 includes a mounting base plate 401, a shielding top plate 402, a folding wall panel 408, and a side plate 412. The mounting base plate 401 is fixedly mounted on the carriage. The folding wall panel 408 is rotatably mounted to the mounting base plate 401. The shielding top plate 402 is rotatably mounted on the folding wall panel 408. The side plate 412 is rotatably mounted on the shielding top plate 402. The shielding top plate 402 is equipped with an expansion component for supporting the unfolding of the folding wall panel 408 to form a third expansion space.

[0035] The vehicle body assembly 1 includes a vehicle body 101. Hydraulic outriggers 108 for leveling the vehicle body are installed on the vehicle body 101. Two auxiliary support frames 102 are longitudinally fixedly mounted on the main body of the vehicle body 101. Transverse beams are fixedly mounted at both ends of the two frames 102, and a cargo box floor 103 is fixedly mounted on the beams. The two beams, the two frames 102, and the cargo box floor 103 create additional space. To utilize this space, multiple telescopic hydraulic cylinders 30 are linearly arrayed on the frames 102. 2 (Quantity set according to requirements), the fixed end of the telescopic hydraulic cylinder 302 is fixedly installed with the frame 102, and the extended end of the telescopic hydraulic cylinder 302 is fixedly installed with the expansion box II 301. There is a gap between the multiple array-installed telescopic hydraulic cylinders 302. A series water tank system 7 is set in the gap. The series water tank system 7 includes several horizontally arranged small single long strip water tanks (quantity set according to requirements). The length direction of the water tank is consistent with the length of the carriage floor 103, completely filling the gap between the telescopic hydraulic cylinders 302.The height of the water tank is the same as the distance between the frame 102 and the floor 103 of the carriage. The material can be stainless steel, aluminum alloy, or plastic, with food-grade material preferred to ensure water quality. Multiple water tanks are installed in series, each with an independent inlet, outlet, and vent. The inlets and outlets are connected in series via a central pipe to form a unified water supply and drainage system (this technical feature is not shown in the figure and uses existing technology and solutions). Carriage beams 104 are vertically fixed at the four corners of the floor 103, and carriage roofs are fixedly installed at the top of the four carriage beams 104. The roof panel 106 has a fixed slide rail groove 107 and a rotatably mounted tail plate 105. The tail plate 105 is fixedly supported by the slide rail groove 107 when it is extended and retracted. The frame 102 is equipped with a lifting hydraulic cylinder 110 and an adjusting hydraulic cylinder 111. The fixed end of the lifting hydraulic cylinder 110 is fixedly mounted to the frame 102 through a bracket. The extended end of the lifting hydraulic cylinder 110 is rotatably mounted with a mounting shaft. The mounting shaft is slidably mounted to the car body beam frame 104. The mounting shaft is hinged to the adjusting hydraulic cylinder 111. The fixed end of the adjusting hydraulic cylinder 111 is supported by a bracket. Hinged to the frame 102, the extended end of the adjusting hydraulic cylinder 111 is hinged to the mounting shaft. A hydraulic tailgate 109 is fixedly mounted on the mounting shaft. The retraction of the hydraulic tailgate 109 is divided into two steps. In the first step, the lifting hydraulic cylinder 110 is activated (at this time, the RV is in the extended state), which drives the mounting shaft to move upward, thereby moving the hydraulic tailgate 109 to be flush with the floor 103 of the vehicle body. This then moves various items on the hydraulic tailgate 109 upward, and personnel transfer the items to the floor 103 of the vehicle body to complete the storage of the items. Steps 2 and 3 are completed in sequence to retract the tailgate 105. This allows the RV to retract. The second step involves activating hydraulic cylinder 111 (at which point the RV is in its retracted state), which rotates the mounting shaft, causing the hydraulic tailgate 109 to rotate around the mounting shaft. Finally, the tailgate 109 fits onto the closed tailgate 105, completing the storage. The hydraulic tailgate 109 can transport motorcycles, small vehicles, and various items into the interior of the cargo compartment. The cargo compartment floor 103 is also equipped with anchor points for securing transported items, and includes a sliding track for connecting the extension box I 203 and a fitting frame for engaging with the additional frame 304.

[0036] Example 2

[0037] like Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, in this embodiment, the extendable carriage I2 includes an extendable box I203 slidably mounted on the carriage floor 103. Four sliding wheels 206 are fixedly mounted on the bottom of the extendable box I203, and are also fixedly mounted on the four bottom corners of the extendable box I203. In the retracted state, the sliding wheels 206 are located in the sliding tracks of the carriage floor 103. The extendable carriage I2 also includes a side-flipping plate 201 rotatably mounted on the carriage floor 103. The side-flipping plate 201 is equipped with an unfolding hydraulic cylinder 207 for pushing the side-flipping plate 201 open. The fixed end of the hydraulic cylinder 207 is fixedly installed to the floor plate 103 of the carriage. The extended end of the hydraulic cylinder 207 is hinged to the side flap 201 via a hinge seat. Both ends of the side flap 201 are respectively provided with retractable connecting rods 202 (which can be elastic steel wire ropes or folding support rods) to assist in the unfolding of the side flap 201. One end of the retractable connecting rod 202 is hinged to the carriage section, and the other end is hinged to the side flap 201. When in the retracted state, the retractable connecting rod 202 is partially retracted and fitted between the side flap 201 and the carriage beam 104. The two short sides of the 01 are also fixedly equipped with latches 205 for locking the side flap 201 to the carriage beam 104 when closed. The side flap 201 is also provided with guide rail grooves corresponding to the slide rails of the expansion box I 203. In the extended state, the retraction linkage 202 is in the straight state, and the top surface of the side flap 201 is flush with the top surface of the carriage floor 103. The track groove of the side flap 201 is flush with the slide rail of the expansion box I 203 to facilitate the expansion of the expansion box I 203. The expansion box I 203 is pre-installed with kitchen appliances, bathroom facilities, and a refrigerator. For living facilities, the expansion box I 203 is fixedly installed with a cable installation chain II 6 for installing cables. The first end of the cable installation chain II 6 is fixedly installed to the roof plate 106 of the carriage, and the second end of the cable installation chain II 6 is fixedly installed to the expansion box I 203. The cables of the electrical equipment on the expansion box I 203 are integrated and installed through the cable installation chain II 6. One end of the cable is connected to the electrical equipment on the expansion box I 203, and the other end is connected to the power supply equipment fixedly installed on the roof plate 106 of the carriage. The cable installation chain II 6 ensures a stable water and electricity transmission.

[0038] When it is necessary to expand the expansion box I 203, adjust the latch 205 to loosen the locking between the side flap 201 and the carriage beam 104. Activate the expansion hydraulic cylinder 207 to flatten the side flap 201, so that the side flap 201 and the carriage floor 103 form a large flat surface, and the track groove of the side flap 201 is flush with the sliding track of the expansion box I 203. At this time, the retraction linkage 202 is in a straight state to assist in stabilizing the side flap 201. Manually drive the expansion box I 203 to move onto the side flap 201. During this movement, the cables in the cable installation chain II 6 unfold as the expansion box I 203 moves (e.g., ...). Figure 4As shown), to ensure stable water and electricity transmission, when the expansion is completed, the side flap 201, the expansion box I 203, and the carriage section form the first expansion box. Simultaneously, the expansion box I 203 is locked in place by the latch 205 to ensure its position does not shift. The expansion box I 203 is equipped with a window 204 to enhance the view. The observation surface of the expansion box I 203 can be set as a full glass wall, further enhancing the view and improving comfort. When it is necessary to retract the expansion box I 203... When retracting, adjust the latch 205 to disengage the extension box I 203 from the side flap 201, push the extension box I 203 into the carriage floor 103, and after it is fully retracted, flip the side flap 201 to fit against the carriage beam 104, adjust the latch 205 to lock the side flap 201 to the carriage beam 104, and then complete the retraction of the extension box I 203. At this time, the extension box I 203 is completely inside the carriage floor 103, and the side flap 201 completely closes the extension box I 203.

[0039] like Figure 7 As shown, the extended carriage II3 includes an extended box II301 slidably mounted on the carriage floor 103. The extended box II301 includes a slide rail surface slidably mounted to the carriage section and an mounting surface for mounting objects. The mounting surface is provided with mounting slots 303 for mounting objects (the number of slots depends on the number of objects). The dimensions of the extended box II301 are smaller than the internal dimensions of the extended box I203. In the retracted state, the extended box II301 can be embedded into the extended box I203. A cable mounting chain I5 for installing cables is fixedly mounted on the extended box II301. The first end of the cable mounting chain I5 is fixedly mounted to the carriage roof 106, and the second end is fixedly mounted to the extended box II301. The cables of the electrical equipment on the extended box II301 are integrated and installed through the cable mounting chain I5. One end of the cable is connected to the electrical equipment on the extended box II301, and the other end is connected to the equipment fixedly mounted on the carriage roof. The power supply equipment on plate 106 is connected, and stable water and electricity transmission is ensured through cable installation chain I5. The extended carriage II3 also includes multiple telescopic hydraulic cylinders 302 fixedly installed on the frame 102. The telescopic hydraulic cylinders 302 are linearly arrayed on the frame 102 for expanding and retracting the mounting slots 303. The fixed end of the telescopic hydraulic cylinders 302 is fixedly installed on the frame 102, and the extended end of the telescopic hydraulic cylinders 302 is fixedly installed on the extended box II 301. The extended box II 301 is fixedly installed with an additional frame 304 for installing additional electrical appliances and a ladder I 305 for entering the carriage. When the extended box II 301 is retracted, the additional frame 304 and the ladder I 305 are fitted with the fitting frame of the carriage floor plate 103. The additional frame 304 is used to install equipment that needs to be connected to the outside, such as air conditioner outdoor units and water tanks. When retracted, the extended box II 301 is completely inserted into the carriage, ensuring the overall flatness and further utilizing the space.

[0040] When it is necessary to extend the expansion box II 301, the telescopic hydraulic cylinder 302 is activated to push the expansion box II 301 to move and extend. During the movement, the cables in the cable installation chain I 5 are extended along with the movement of the expansion box II 301 (e.g., Figure 3 As shown), to ensure stable water and electricity transmission, when the expansion is completed, expansion boxes I 203, II 301, and the carriage together form a large expansion space for personnel to carry out daily activities. When retracting expansion box II 301, the telescopic hydraulic cylinder 302 is activated to retract expansion box II 301, and expansion box II 301 is completely inserted into expansion box I 203. The mounting surface of expansion box II 301 is flush with the carriage (as shown). Figure 2 (As shown), to ensure overall flatness.

[0041] like Figure 8As shown, the extended carriage Ⅲ4 includes a mounting base plate 401 fixedly installed on the carriage roof 106. The mounting base plate 401 is a rectangular groove frame. Folding wall panels 408 are rotatably installed in the two long sides of the groove frame. The folding wall panels 408 include an upper folding plate, a flexible connecting pipe, and a lower folding plate, which can form a shielding wall with the side panels 412 when extended. The lower folding plate of the folding wall panel 408 is rotatably installed with the groove frame of the mounting base plate 401. A shielding top plate 402 is rotatably installed on the upper folding plate of the two folding wall panels 408. The two long sides of the shielding top plate 402 are rotatably installed with the folding wall panels. The two short sides of the shielding top plate 402 are rotatably installed with side panels 412. The side panels 412 are provided with fixing buckles. When in the retracted state, the side panels 412 deflect. The mounting base plate 401 is attached to the top panel 402 via clips. The folding wall panel 408, after folding, is completely embedded in the groove of the mounting base plate 401. The folding wall panel 408 has chain-type windows for viewing scenery and ventilation. Fixing rods 407 are fixedly installed in the two short-side groove frames of the mounting base plate 401. Sliding seats 406 are slidably installed on both fixing rods 407. Two mounting slide rods are also fixedly installed on the top panel 402. Mounting seats are slidably installed on each of the two mounting slide rods. Connecting slide rods II 405 are hinged to each of the two sliding seats 406. One end of the connecting slide rod II 405 is hinged to the sliding seat 406, and the other end is hinged to the end of the mounting slide rod on the top panel 402. Connecting slide rods I and I are rotatably mounted in the middle of connecting slide rod II 405. One end of each connecting slide rod I 404 is hinged to the end of each of the two fixed rods 407, and the other end is hinged to the mounting seats on the two mounting slide rods of the cover plate 402. Supporting hydraulic cylinders 403 are also hinged to each of the two connecting slide rods I 404. The fixed end of the supporting hydraulic cylinder 403 is hinged to the connecting slide rod I 404, and the extended end is hinged to the connecting slide rod II 405. The extended compartment III 4 also includes a connecting compartment 409 fixedly mounted on the vehicle body 101. The connecting compartment 409 is equipped with a shelf 410 for storing miscellaneous items. The shelf 410 can hold furniture such as a bathtub to provide comfortable rest for passengers. A ladder II 411 is also installed to connect the interior space of the RV. The ladder II 411 consists of three parts, which respectively connect the space of the connecting compartment 409, the space of the floor 103 of the vehicle, and the space formed by the roof panel 402 and the folding wall panel 408. It is ergonomic, simple and reliable. An extension hydraulic cylinder 413 is also fixedly installed on the mounting base 401. An open-air extension platform 414 is fixedly installed on the extended end of the extension hydraulic cylinder 413. The open-air extension platform 414 is slidably installed with the mounting base 401. The open-air extension platform 414 can be opened by people to form a three-sided railing. The three-sided railing and the open-air extension platform 414 form a terrace for people to rest and enjoy the scenery. The open-air extension platform 414 can also be extended by people pushing it.

[0042] When the shielding top panel 402 needs to be expanded, the supporting hydraulic cylinder 403 is activated to extend and push the connecting slide rod II 405 and the connecting slide rod I 404 to form an angle, thereby causing the shielding top panel 402 to move upward and the folding wall panel 408 to unfold. After the folding wall panel 408 unfolds, the personnel adjust the buckles of the side panel 412 to disengage the side panel 412 from the shielding top panel 402, deflecting the side panel 412 to support it at a 90° angle with the shielding top panel 402. At the same time, the buckles are adjusted to fix the side panel 412 to the mounting base plate 401, thus completing the expansion work. When the shielding top panel 402 needs to be retracted, the buckles of the side panel 412 are adjusted to disengage the side panel 412 from the mounting base plate 401, pushing the side panel 412 to deflect and fit against the shielding top panel 402. The shielding top panel 402 and the side panel 412 are fixed together by the buckles (e.g., Figure 9 As shown), the support hydraulic cylinder 403 is activated to retract, causing the connecting slide rod II 405 to engage parallel with the connecting slide rod I 404. This allows the support hydraulic cylinder 403, connecting slide rod I 404, and support hydraulic cylinder 403 to fully retract into the groove of the mounting base plate 401, thereby making the shielding top plate 402 fit snugly against the mounting base plate 401, ensuring overall flatness. The extension hydraulic cylinder 413 is activated, pushing the open-air extension platform 414 to extend. After extension, the open-air extension platform 414, under the operation of personnel, supports and fixes the guardrails on three sides. The three guardrails and the open-air extension platform 414 form a terrace for personnel to rest and enjoy the scenery.

[0043] Example 3

[0044] Based on Embodiment 1 and Embodiment 2, the following is a usage process for a large-scale space expansion structure for a motorhome:

[0045] Expansion Operation: First, level the vehicle body using the hydraulic outriggers 108 on the vehicle body 101. Then, activate the telescopic hydraulic cylinder 302 to drive the extension box II 301 to extend, forming a second expansion space. Next, activate the unfolding hydraulic cylinder 207 to drive the side flap 201 to flip. Adjust the retraction linkage 202 to straighten and fix the side flap 201, so that the side flap 201 and the floor 103 of the carriage form a flat plane. Pull out the extension box I 203 and fix it with the latch 205 to form a first expansion space. Activate the support hydraulic cylinder 403 to drive the shielding top plate 402 to move upward, causing the folding wall panel 408 to unfold. Adjust the flipping side panel 412 and fix it with the latch to cooperate with the folding wall panel 408 to form a third expansion space. Activate the extension hydraulic cylinder 413 to push the open-air expansion platform 414 to extend. The railing on the open-air expansion platform 414 is unfolded by personnel to form a terrace.

[0046] Retraction operation: First, reset the side flap 201, then retract the extension box II 301 through the telescopic hydraulic cylinder 302 so that it is completely nested in the side flap 201. Close the hydraulic legs of the vehicle body 101, adjust the flip side plate 412 and fix it to the cover top plate 402 through the buckle. The support hydraulic cylinder 403 resets and drives the cover top plate 402 to reset, so that the folding wall panel 408 is completely retracted into the groove frame of the mounting base plate 401. The guardrail on the open-air extension platform 414 is folded up by personnel, and the extension hydraulic cylinder 413 retracts the open-air extension platform 414, thus completing the retraction operation.

[0047] In daily use, whether in the extended or retracted state, the living equipment on the extended box I 203 and extended box II 301 can be used directly. By using the lifting hydraulic cylinder 110 and the adjusting hydraulic cylinder 111 to push or retract the hydraulic tail plate 109, items can be transported to the outside of the carriage or moved into the carriage. At the same time, the items can be fixed by the fixed anchor points on the carriage floor 103.

[0048] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A large-scale space expansion structure for a motorhome, comprising a vehicle body assembly (1), wherein the vehicle body assembly (1) comprises a transport section consisting of a vehicle body (101) and a frame (102), and a carriage section consisting of a carriage floor (103), a carriage beam frame (104), and a carriage roof (106), characterized in that: The carriage section is movably equipped with extended carriage I (2), extended carriage II (3), and extended carriage III (4), wherein... The extended carriage I (2) includes an extended box I (203) that is slidably installed on the carriage section, and a support component I for assisting in supporting the extended box I (203) to form a first extended space is installed on the extended box I (203); The extended carriage II (3) includes an extended box II (301) that is slidably installed on the carriage section, and a support component II for assisting in supporting the extended box II (301) to form a second extended space is installed on the extended box II (301); The extended carriage Ⅲ (4) includes a mounting base plate (401), a shielding top plate (402), a folding wall panel (408), and a side plate (412). The mounting base plate (401) is fixedly installed on the carriage section. The folding wall panel (408) is rotatably installed on the mounting base plate (401). The shielding top plate (402) is rotatably installed on the folding wall panel (408). The side plate (412) is rotatably installed on the shielding top plate (402). An extension component for supporting the unfolding of the folding wall panel (408) to form a third extended space is installed on the shielding top plate (402).

2. The RV large-proportion space expansion structure according to claim 1, characterized in that: The support assembly I includes a side flap (201), a retractable link (202), a latch (205), a slide rail wheel (206), and an unfolding hydraulic cylinder (207). The side flap (201) is rotatably mounted to the carriage. The first end of the retractable link (202) is hinged to the carriage, and the second end of the retractable link (202) is hinged to the side flap (201) for support after the side flap (201) is deflected. The latch (205) is fixedly mounted on the side flap (201) for locking the side flap (201) to the carriage when it is closed. The side flap (201) is also provided with a guide rail groove. The slide rail wheel (206) is fixedly mounted on the bottom of the expansion box I (203) and cooperates with the guide rail groove of the side flap (201) to unfold the expansion box I (203). The unfolding hydraulic cylinder (207) is fixedly mounted on the carriage for pushing the side flap (201) to flatten.

3. The RV large-proportion space expansion structure according to claim 1, characterized in that: The expansion box I (203) is fixedly installed with a cable installation chain II (6) for installing cables. The first end of the cable installation chain II (6) is fixedly installed with the roof plate (106) of the carriage, and the second end of the cable installation chain II (6) is fixedly installed with the expansion box I (203).

4. The RV large-proportion space expansion structure according to claim 1, characterized in that: The support assembly II includes a plurality of telescopic hydraulic cylinders (302) fixedly mounted on the frame (102). The telescopic hydraulic cylinders (302) are arranged in a linear array on the frame (102) for expanding and retracting the mounting slot (303). The fixed end of the telescopic hydraulic cylinder (302) is fixedly mounted to the frame (102), and the extended end of the telescopic hydraulic cylinder (302) is fixedly mounted to the expansion box II (301).

5. The RV large-proportion space expansion structure according to claim 4, characterized in that: Multiple arrays of telescopic hydraulic cylinders (302) form an installation gap, and a series water tank system (7) for water storage is fixedly installed between the installation gaps.

6. The RV large-proportion space expansion structure according to claim 1, characterized in that: The expansion box II (301) is fixedly installed with a cable installation chain I (5) for installing cables. The first end of the cable installation chain I (5) is fixedly installed with the roof plate (106) of the carriage, and the second end of the cable installation chain I (5) is fixedly installed with the expansion box II (301).

7. The RV large-proportion space expansion structure according to claim 1, characterized in that: An auxiliary frame (304) for installing additional electrical appliances is fixedly installed on the expansion box II (301). The auxiliary frame (304) fits into the transport section when the expansion box II (301) is retracted.

8. The RV large-proportion space expansion structure according to claim 1, characterized in that: The extended assembly includes a supporting hydraulic cylinder (403), connecting slide rod I (404), connecting slide rod II (405), a sliding seat (406), and a fixing rod (407). A mounting slide rod is fixedly installed on the shielding top plate (402), and a mounting seat is fixedly installed on the mounting slide rod of the shielding top plate (402). The fixing rod (407) is fixedly installed on the mounting base plate (401). The first end of the connecting slide rod I (404) is hinged to the fixing rod (407), and the second end of the connecting slide rod I (404) is hinged to the mounting slide rod of the shielding top plate (402). The mounting base is hinged, the sliding base (406) is slidably mounted on the fixed rod (407), the first end of the connecting slide rod II (405) is hinged to the sliding base (406), the second end of the connecting slide rod II (405) is hinged to the mounting slide rod of the shielding top plate (402), the connecting slide rod II (405) and the connecting slide rod I (404) are rotatably mounted, the fixed end of the supporting hydraulic cylinder (403) is hinged to the connecting slide rod I (404), and the extended end of the supporting hydraulic cylinder (403) is hinged to the connecting slide rod II (405) for unfolding the shielding top plate (402).

9. The RV large-proportion space expansion structure according to claim 1, characterized in that: The extended compartment III (4) also includes a connecting compartment (409) fixedly installed on the vehicle body (101). The connecting compartment (409) is provided with a shelf (410) for placing miscellaneous items. The connecting compartment (409) is also equipped with a ladder II (411) for connecting the interior space of the RV. The extended compartment III (4) also includes an extension hydraulic cylinder (413) fixedly installed on the mounting base plate (401). An open-air extension platform (414) is fixedly installed on the extended end of the extension hydraulic cylinder (413). The open-air extension platform (414) is slidably installed with the mounting base plate (401).

10. A large-scale space expansion structure for a motorhome according to claim 1, characterized in that: The carriage section is also equipped with a hydraulic tailgate (109) for assisting in the transfer of transported goods.

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