A combined RV expansion platform

Abstract

The present invention relates to the technical field of RVs, and specifically to a combined RV expansion platform, comprising a vehicle body, and also comprising: an expansion bin, which is movably arranged on both sides of the vehicle body; a sealing plate, which is fixedly arranged on the top of the expansion bin; a cleaning component, which is arranged in the vehicle body and above the expansion bin, and is used to clean the top of the expansion bin; an air storage component, which is arranged in the vehicle body, and a jet pipe is fixedly arranged on the sealing plate. When the expansion bin is retracted, the air storage component is connected to the jet pipe to drive dirt to be discharged toward both sides. This combined RV expansion platform, by arranging a cleaning component on the top of the expansion bin, can clean the top of the expansion bin when the expansion bin is retracted into the RV, so as to clean the dirt left on the top of the expansion bin during the RV's stay. When the expansion bin is about to be completely retracted, the dirt is blown away toward both sides through the jet pipe, so as to ensure the cleanliness of the top of the expansion bin.

Description

Technical Field

[0001] The present invention relates to the technical field of recreational vehicles, in particular to a combined recreational vehicle expansion platform. Background Art

[0002] RV, also known as "home on wheels", has both functions of "house" and "car", but its attribute is still a car. It is a movable type of vehicle with basic facilities necessary for home. The household facilities on the vehicle include: bedding, stoves, refrigerators, cabinets, sofas, dining tables and chairs, washing facilities, air conditioning, televisions, stereos and other furniture and electrical appliances. It can be divided into driving area, living area, bedroom area, sanitary area, kitchen area, etc. RV is a combination of "clothing, food, housing and transportation". With the improvement of people's living standards, RV has gradually become one of the means of transportation for people to travel and travel after work.

[0003] At present, most RVs have unreasonable factors in their spatial structure design and are not compact in structure, so that the cabins only have simple living facilities and cannot meet the various needs of travel. In order to solve the problem of insufficient interior space, existing RVs are equipped with expansion compartments. When the vehicle arrives at the camp, the expansion compartment is opened to provide passengers with spacious sleeping and activity space. However, after use, dust and some fallen leaves will remain on the top of the expansion compartment. When the dirt is retracted, it will enter the groove of the car body. Long-term accumulation will affect the movement of the expansion compartment and make it difficult to retract it. For this reason, we propose a combined RV expansion platform. Summary of the invention

[0004] In order to solve the above technical problems, the embodiment of the present application provides a modular RV expansion platform, including a vehicle body, and also including:

[0005] An expansion compartment, which is movably arranged on both sides of the vehicle body;

[0006] A sealing plate, the sealing plate is fixedly arranged on the top of the expansion bin;

[0007] A cleaning component, which is arranged in the vehicle body and above the expansion compartment, and is used to clean the top of the expansion compartment;

[0008] The gas storage component is arranged in the vehicle body, and the sealing plate is fixedly provided with an injection pipe. When the expansion compartment is retracted, the gas storage component is connected with the injection pipe to drive the dirt to be discharged to both sides.

[0009] In some embodiments, sliding grooves for the expansion bin to move are provided on both sides of the vehicle body, a rack is fixedly provided on one side of the bottom of the expansion bin, a driving motor is fixedly provided in the vehicle body, a driving gear is fixedly connected to the output end of the driving motor, and the driving gear is meshed with the rack.

[0010] In some embodiments, a cavity is opened on the top of the vehicle body, and the cavity is connected to the slide groove. The cleaning assembly and the air storage assembly are both arranged in the cavity. The cleaning assembly includes a cleaning shaft rotatably arranged in the cavity, a cleaning brush is fixedly arranged on the outside of the cleaning shaft, and cleaning gears are arranged on the outside of both ends of the cleaning shaft. A transmission shaft is rotatably arranged in the cavity, and a transmission gear is fixedly arranged on the outside of the transmission shaft. The transmission gear can mesh with the cleaning gear, and a driven wheel abutting against the top of the expansion bin is also arranged on the outside of the transmission shaft.

[0011] In some embodiments, the transmission shaft is telescopic, and the transmission shaft includes a sleeve rotatably set in a cavity, a sliding rod is slidably set in the sleeve, the transmission gear and the driven wheel are fixedly set on the outside of the sliding rod, a connecting spring is set in the sleeve, and the two ends of the connecting spring are respectively fixedly connected to the sliding rod and the bottom of the sleeve, a magnetic block is fixedly set at the bottom end of the sliding rod, and an electromagnet is fixedly set in the sleeve, and the electromagnet repels the magnetic block when power is turned on.

[0012] In some embodiments, the gas storage assembly includes a gas tank fixedly disposed in a cavity, one side of the gas tank is connected to an air cylinder via a pipeline, a piston is slidably disposed in the air cylinder, a transmission rod is fixedly connected to the piston, the transmission rod slides through the air cylinder, a one-way valve for one-way air intake is provided on the air cylinder, and a driving member for driving the transmission rod to move back and forth is also provided in the cavity.

[0013] In some embodiments, the driving member includes a worm rotatably arranged in a cavity, one end of the worm is fixedly connected to a roller, the bottom end of the roller abuts against the top of the expansion bin, a fixed shaft is rotatably arranged in the cavity, a rotating disk and a worm wheel meshing with the worm are fixedly arranged on the outside of the fixed shaft, a protrusion is fixedly arranged on the rotating disk, a rotating rod is rotatably connected to the outside of the protrusion, and the end of the rotating rod is rotatably connected to the transmission rod.

[0014] In some embodiments, the jet pipe is fixedly arranged on the inner side of the sealing plate, and a plurality of air holes are opened on the jet pipe, the air holes are arranged obliquely and the air holes on both sides of the jet pipe are respectively facing the end direction of the jet pipe, a connecting pipe is fixedly arranged on the jet pipe, and a plug is fixedly arranged on the vehicle body, the plug is connected to the gas tank, and the connecting pipe and the plug are connected to each other when plugged into each other.

[0015] In some embodiments, a fixing ring 1 is fixedly provided inside the connecting tube, a supporting spring is fixedly connected to the fixing ring 1, a movable ring is fixedly connected to the end of the supporting spring, a supporting rod is fixedly provided on the fixing ring 1, a supporting block is provided at the end of the supporting rod, the supporting block is located on the inner side of the movable ring and cooperates with the movable ring to close the connecting tube.

[0016] In some embodiments, a fixing ring 2 is fixedly provided inside the cannula, a fixing spring is fixedly provided on the fixing ring 2, a fixing block is provided at the end of the fixing spring, a fixing ring 3 is provided outside the fixing block, and the fixing ring 3 is fixedly connected to the cannula.

[0017] In some embodiments, movable plates are respectively provided on both sides of the top of the expansion bin for transverse sliding, and the movable plates are located below the driven wheels.

[0018] The present invention has at least the following beneficial effects:

[0019] This combined RV expansion platform is equipped with a cleaning component on the top of the expansion compartment, which can clean the top of the expansion compartment when the expansion compartment is retracted into the RV, so as to clean the dirt left on the top of the expansion compartment during the RV's stay. When the expansion compartment is about to be completely retracted, the dirt is blown away to both sides through the jet pipe to ensure the cleanliness of the top of the expansion compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 Schematic diagram of local explosion structure;

[0022] Figure 3 For the present invention Figure 1 Schematic diagram of partial cross-section structure;

[0023] Figure 4 This is a schematic diagram of the expansion warehouse structure of the present invention;

[0024] Figure 5 For the present invention Figure 1 A schematic diagram of the top partial cross-sectional structure;

[0025] Figure 6 For the present invention Figure 1 The schematic diagram of the vehicle body structure is removed;

[0026] Figure 7 It is a structural schematic diagram of the transmission shaft of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the gas storage component of the present invention;

[0028] Fig. 9 This is a schematic diagram of the cross-sectional structure of the connecting tube and the cannula of the present invention;

[0029] Fig.10 It is a schematic diagram of the structure of the jet pipe of the present invention;

[0030] Fig.11 This is a schematic diagram of the expansion warehouse structure in Example 2 of the present invention.

[0031] In the figure: 1-car body; 2-expansion chamber; 3-sealing plate; 4-cleaning assembly; 41-cleaning shaft; 42-cleaning brush; 43-cleaning gear; 44-transmission gear; 45-driven wheel; 5-gas storage assembly; 51-gas tank; 52-gas cylinder; 53-piston; 54-transmission rod; 6-jet pipe; 7-transmission shaft; 71-sleeve; 72-slide rod; 73-connecting spring; 74-magnetic block; 75-electromagnet; 8-driving member; 81-worm; 82- Roller; 83-fixed shaft; 84-rotating disk; 85-worm gear; 86-bump; 87-rotating rod; 9-slide groove; 10-rack; 11-drive motor; 12-drive gear; 13-air hole; 14-connecting pipe; 15-insertion tube; 16-fixing ring one; 17-support spring; 18-movable ring; 19-support rod; 20-support block; 21-fixing ring two; 22-fixing spring; 23-fixing block; 24-fixing ring three; 25-movable plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1, please refer to Figure 1-Figure 10 The present invention provides a technical solution: a combined RV expansion platform, including a body 1, and also including expansion bins 2 movably arranged on both sides of the body 1, a sealing plate 3 is fixedly arranged on the top of the expansion bin 2, a cleaning component 4 is arranged in the body 1, and the cleaning component 4 is located above the expansion bin 2 and is used to clean the top of the expansion bin 2, an air storage component 5 is arranged in the body 1, and an air jet pipe 6 is fixedly arranged on the sealing plate 3, when the expansion bin 2 is retracted, the air storage component 5 is connected with the air jet pipe 6 to drive the dirt to be discharged to both sides.

[0034] Both sides of the vehicle body 1 are provided with slide grooves 9 for the expansion compartment 2 to move, a rack 10 is fixedly arranged on one side of the bottom of the expansion compartment 2, a driving motor 11 is fixedly arranged inside the vehicle body 1, and a driving gear 12 is fixedly connected to the output end of the driving motor 11, and the driving gear 12 is meshed with the rack 10. When the driving motor 11 is started, it drives the driving gear 12 to rotate, and the driving gear 12 is meshed with the rack 10 to drive the rack 10 to move, thereby driving the expansion compartment 2 to move, and the extension and retraction of the expansion compartment 2 are driven by changing the forward and reverse rotation of the driving motor 11.

[0035] A cavity is provided on the top of the vehicle body 1, and the cavity is connected to the slide groove 9. The cleaning component 4 and the air storage component 5 are both arranged in the cavity. The cleaning component 4 includes a cleaning shaft 41 rotatably arranged in the cavity, and a cleaning brush 42 is fixedly provided on the outside of the cleaning shaft 41. The bottom of the cleaning brush 42 abuts the top of the expansion bin 2. Cleaning gears 43 are provided on the outside of both ends of the cleaning shaft 41. A transmission shaft 7 is rotatably arranged in the cavity, and a transmission gear 44 is fixedly provided on the outside of the transmission shaft 7. The transmission gear 44 can mesh with the cleaning gear 43. A driven wheel 45 abutting the top of the expansion bin 2 is also provided on the outside of the transmission shaft 7. When the expansion bin 2 moves, it can drive the driven wheel 45 in contact with it to rotate, and the driven wheel 45 drives the transmission shaft 7 to rotate, thereby driving the transmission gear 44 to rotate, and the transmission gear 44 drives the cleaning gear 43 and the cleaning shaft 41 to rotate, and the cleaning shaft 41 drives the cleaning brush to rotate to clean the dirt.

[0036] The transmission shaft 7 is telescopic, and includes a sleeve 71 rotatably arranged in the cavity, a slide bar 72 is slidably arranged in the sleeve 71, the transmission gear 44 and the driven wheel 45 are fixedly arranged on the outside of the slide bar 72, a connecting spring 73 is arranged in the sleeve 71, and the two ends of the connecting spring 73 are respectively fixedly connected to the slide bar 72 and the bottom of the sleeve 71, a magnetic block 74 is fixedly arranged at the bottom end of the slide bar 72, and an electromagnet 75 is fixedly arranged in the sleeve 71. When power is turned on, the electromagnet 75 repels the magnetic block 74;

[0037] When the electromagnet 75 is energized, the electromagnet 75 repels the magnetic block 74 to move it, thereby driving the slide bar 72 to move. The slide bar 72 drives the transmission gear 44 and the driven wheel 45 to move so that the transmission gear 44 can engage with the cleaning gear 43. Then, when the expansion chamber 2 moves, the transmission gear 44 can drive the cleaning gear 43 to rotate.

[0038] The gas storage component 5 includes a gas tank 51 fixedly arranged in the cavity, one side of the gas tank 51 is connected to an air cylinder 52 through a pipeline, a piston 53 is slidably arranged in the air cylinder 52, a transmission rod 54 is fixedly connected to the piston 53, the transmission rod 54 slides through the air cylinder 52, a one-way valve for one-way air intake is provided on the air cylinder 52, and a driving member 8 for driving the transmission rod 54 to reciprocate is also provided in the cavity. When the transmission rod 54 drives the piston 53 to reciprocate in the air cylinder 52, the air cylinder 52 repeatedly draws air and delivers air to inflate the gas tank 51.

[0039] The driving member 8 includes a worm 81 rotatably arranged in the cavity, one end of the worm 81 is fixedly connected to a roller 82, the bottom end of the roller 82 abuts against the top of the expansion chamber 2, a fixed shaft 83 is rotatably arranged in the cavity, a rotating disk 84 and a worm wheel 85 meshing with the worm 81 are fixedly arranged on the outer side of the fixed shaft 83, a protrusion 86 is fixedly arranged on the rotating disk 84, a rotating rod 87 is rotatably connected to the outer side of the protrusion 86, and the end of the rotating rod 87 is rotatably connected to the transmission rod 54;

[0040] When the expansion chamber 2 moves, it can drive the roller 82 abutting against it to rotate, and the roller 82 drives the worm 81 to rotate and engage with the worm wheel 85. When the worm wheel 85 rotates, it drives the fixed shaft 83 and the rotating disk 84 to rotate. The rotating disk 84 drives the protrusion 86 to rotate. When the protrusion 86 rotates, it drives the rotating rod 87 to move, thereby causing the rotating rod 87 to drive the transmission rod 54 to move back and forth in the air cylinder 52.

[0041] The jet pipe 6 is fixedly arranged on the inner side of the sealing plate 3, and a plurality of air holes 13 are opened on the jet pipe 6. The air holes 13 are arranged obliquely and the air holes 13 on both sides of the jet pipe 6 are respectively facing the end direction of the jet pipe 6. When the jet pipe 6 sprays air, the dirt brushed out by the cleaning brush 42 can be driven to move toward the two sides of the sealing plate 3, so that the dirt is discharged from the two sides of the expansion chamber 2. A connecting pipe 14 is fixedly arranged on the jet pipe 6, and a plug 15 is fixedly arranged on the vehicle body 1. The plug 15 is connected to the gas tank 51, and the connecting pipe 14 and the plug 15 are connected to each other when plugged into each other.

[0042] A fixing ring 16 is fixedly provided inside the connecting tube 14, a supporting spring 17 is fixedly connected to the fixing ring 16, a movable ring 18 is fixedly connected to the end of the supporting spring 17, a supporting rod 19 is fixedly provided on the fixing ring 16, a supporting block 20 is provided at the end of the supporting rod 19, the support block 20 is located inside the movable ring 18 and cooperates with the movable ring 18 to close the connecting tube 14.

[0043] A second fixing ring 21 is fixedly arranged inside the cannula 15, a fixing spring 22 is fixedly arranged on the second fixing ring 21, a fixing block 23 is arranged at the end of the fixing spring 22, a fixing ring 3 24 is arranged outside the fixing block 23, and the fixing ring 3 24 is fixedly connected to the cannula 15;

[0044] When the expansion bin 2 is retracted, the insert tube 15 and the connecting tube 14 are close to each other. When the insert tube 15 is inserted into the connecting tube 14, the insert tube 15 will squeeze the movable ring 18 so that the movable ring 18 and the support block 20 are offset, thereby making the connecting tube 14 conductive. At the same time, the support block 20 in the connecting tube 14 will squeeze the fixed block 23 so that it is offset from the fixed ring three 24, thereby making the insert tube 15 conductive. The gas in the gas tank 51 enters the jet pipe 6 from the insert tube 15 through the connecting tube 14, and then the gas in the gas tank 51 is ejected from the jet pipe 6 to discharge the dirt above the expansion bin 2.

[0045] In summary, when the expansion bin 2 is expanded outward, the electromagnet 75 is not energized, the cleaning gear 43 and the transmission gear 44 are not meshed, and the cleaning brush 42 does not work. At the same time, when the expansion bin 2 is expanded, the roller 82 is driven to rotate, and the roller 82 drives the worm 81 to rotate and mesh with the worm gear 85. When the worm gear 85 rotates, it drives the fixed shaft 83 and the rotating disk 84 to rotate, and the rotating disk 84 drives the protrusion 86 to rotate. When the protrusion 86 rotates, it drives the rotating rod 87 to move, so that the rotating rod 87 drives the transmission rod 54 to reciprocate in the air cylinder 52. When the transmission rod 54 drives the piston 53 to reciprocate in the air cylinder 52, the air in the air cylinder 52 is repeatedly pumped and sent to inflate the air tank 51.

[0046] When the expansion bin 2 is retracted, the electromagnet 75 is energized, and the electromagnet 75 repels the magnetic block 74 to move it, thereby driving the slide bar 72 to move. The slide bar 72 drives the transmission gear 44 and the driven wheel 45 to move so that the transmission gear 44 can mesh with the cleaning gear 43. Then, when the expansion bin 2 moves, the transmission gear 44 can drive the cleaning gear 43 to rotate, thereby driving the cleaning brush 42 to sweep out the dirt on the top of the expansion bin 2. At the same time, the roller 82 will also rotate to inflate the gas tank 51. When the expansion bin 2 continues to move, the insert tube 15 will be connected with the connecting tube 14. At this time, the insert tube 15 and the connecting tube 14 are both turned on, so that the jet pipe 6 can drive the dirt to move along the sealing plate 3 toward both sides to discharge the dirt.

[0047] Example 2, please refer to Fig.11 The main structure of the second embodiment is the same as that of the first embodiment, except that movable plates 25 are respectively provided on both sides of the top of the expansion bin 2 for horizontal sliding, and the movable plates 25 are located below the driven wheel 45. Since the expansion bin 2 can drive the driven wheel 45 to rotate when moving longitudinally, the driven wheel 45 will have greater friction when moving horizontally, and will be worn after long-term use. Therefore, a movable plate 25 for horizontal movement is provided on the expansion bin 2 to enable the driven wheel 45 to move smoothly.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular RV expansion platform, comprising a vehicle body (1), characterized in that: Also included are: An expansion compartment (2), wherein the expansion compartment (2) is movably arranged on both sides of the vehicle body (1); A sealing plate (3), wherein the sealing plate (3) is fixedly arranged on the top of the expansion chamber (2); A cleaning component (4), the cleaning component (4) being arranged in the vehicle body (1) and located above the expansion compartment (2), and being used for cleaning the top of the expansion compartment (2); An air storage component (5), the air storage component (5) being arranged in the vehicle body (1), an air jet pipe (6) being fixedly arranged on the sealing plate (3), and when the expansion compartment (2) is retracted, the air storage component (5) is connected to the air jet pipe (6) to drive dirt to be discharged toward both sides; Both sides of the vehicle body (1) are provided with slide grooves (9) for the expansion compartment (2) to move, a rack (10) is fixedly arranged on one side of the bottom of the expansion compartment (2), a drive motor (11) is fixedly arranged inside the vehicle body (1), an output end of the drive motor (11) is fixedly connected to a drive gear (12), and the drive gear (12) is meshed with the rack (10); A cavity is provided on the top of the vehicle body (1), the cavity being communicated with the slide groove (9), the cleaning component (4) and the gas storage component (5) being both arranged in the cavity, the cleaning component (4) comprising a cleaning shaft (41) rotatably arranged in the cavity, a cleaning brush (42) being fixedly arranged on the outside of the cleaning shaft (41), cleaning gears (43) being arranged on the outside of both ends of the cleaning shaft (41), a transmission shaft (7) being rotatably arranged in the cavity, a transmission gear (44) being fixedly arranged on the outside of the transmission shaft (7), the transmission gear (44) being capable of meshing with the cleaning gear (43), and a driven wheel (45) being arranged on the outside of the transmission shaft (7) and abutting against the top of the expansion chamber (2); The gas storage assembly (5) comprises a gas tank (51) fixedly arranged in a cavity, one side of the gas tank (51) being connected to a gas cylinder (52) via a pipeline, a piston (53) being slidably arranged in the gas cylinder (52), a transmission rod (54) being fixedly connected to the piston (53), the transmission rod (54) slidably passing through the gas cylinder (52), a one-way valve for one-way air intake being arranged on the gas cylinder (52), and a driving member (8) for driving the transmission rod (54) to reciprocate is also arranged in the cavity.

2. The modular RV expansion platform according to claim 1, characterized in that: The transmission shaft (7) is telescopic, and comprises a sleeve (71) rotatably arranged in a cavity, a slide bar (72) slidably arranged in the sleeve (71), the transmission gear (44) and the driven wheel (45) are both fixedly arranged on the outside of the slide bar (72), a connecting spring (73) is arranged in the sleeve (71), and the two ends of the connecting spring (73) are respectively fixedly connected to the slide bar (72) and the bottom of the sleeve (71), a magnetic block (74) is fixedly arranged at the bottom end of the slide bar (72), and an electromagnet (75) is fixedly arranged in the sleeve (71), and the electromagnet (75) repels the magnetic block (74) when power is turned on.

3. The modular RV expansion platform according to claim 1, characterized in that: The driving member (8) comprises a worm (81) rotatably arranged in the cavity, one end of the worm (81) is fixedly connected to a roller (82), the bottom end of the roller (82) abuts against the top of the expansion chamber (2), a fixed shaft (83) is rotatably arranged in the cavity, a rotating disk (84) and a worm wheel (85) meshing with the worm (81) are fixedly arranged outside the fixed shaft (83), a protrusion (86) is fixedly arranged on the rotating disk (84), a rotating rod (87) is rotatably connected to the outside of the protrusion (86), and the end of the rotating rod (87) is rotatably connected to the transmission rod (54).

4. The modular RV expansion platform according to claim 1, characterized in that: The jet pipe (6) is fixedly arranged on the inner side of the sealing plate (3), and a plurality of air holes (13) are opened on the jet pipe (6), the air holes (13) are arranged obliquely, and the air holes (13) on both sides of the jet pipe (6) are respectively oriented toward the end of the jet pipe (6), a connecting pipe (14) is fixedly arranged on the jet pipe (6), and an inserting pipe (15) is fixedly arranged on the vehicle body (1), the inserting pipe (15) is communicated with the gas tank (51), and the connecting pipe (14) and the inserting pipe (15) are mutually conductive when plugged into each other.

5. The modular RV expansion platform according to claim 4, characterized in that: A fixing ring (16) is fixedly arranged inside the connecting tube (14), a supporting spring (17) is fixedly connected to the fixing ring (16), a movable ring (18) is fixedly connected to the end of the supporting spring (17), a supporting rod (19) is fixedly arranged on the fixing ring (16), a supporting block (20) is arranged at the end of the supporting rod (19), and the supporting block (20) is located inside the movable ring (18) and cooperates with the movable ring (18) to close the connecting tube (14).

6. The modular RV expansion platform according to claim 4, characterized in that: A second fixing ring (21) is fixedly arranged inside the insertion tube (15), a fixing spring (22) is fixedly arranged on the second fixing ring (21), a fixing block (23) is arranged at the end of the fixing spring (22), a third fixing ring (24) is arranged outside the fixing block (23), and the third fixing ring (24) is fixedly connected to the insertion tube (15).

7. The modular RV expansion platform according to claim 1, characterized in that: Moving plates (25) are respectively provided on both sides of the top of the expansion bin (2) for transverse sliding, and the moving plates (25) are located below the driven wheel (45).

Images