Self-balancing device for self-propelled off-road RV box

Abstract

The present application discloses a self-balancing device for a self-propelled off-road RV box, comprising a sub-beam body for connecting to the bottom end of the RV box, a front triangular balance beam body for connecting to the RV chassis beam, a rear triangular balance beam body and an axle-holding device, wherein the front triangular balance beam body and the rear triangular balance beam body are respectively arranged near the two ends of the sub-beam body, the axle-holding device is arranged between the front triangular balance beam body and the rear triangular balance beam body, and the front triangular balance beam body and the rear triangular balance beam body both include a hard limit structure for limiting the swing angle of the RV box, and the axle-holding device includes a soft limit structure for restoring the RV box to a horizontal position. The self-balancing device solves the problem that when an off-road RV passes through a bumpy road at high speed, the vehicle ladder is easily damaged by twisting, the safety of the rear box structure is endangered, and danger is very likely to occur.

Description

Technical Field

[0001] The present application relates to the technical field of off-road RVs, and more specifically, to a self-balancing device for a self-propelled off-road RV box. Background Art

[0002] According to mechanical analysis and experiments, using the traditional box fixing method, when the RV box load reaches 5 tons and the speed reaches 10km / h, a dynamic pressure test is conducted in this state through a special sine wave and single twist road bump test section. The instantaneous pressure on one side is 17 tons, and when the sine wave slope rises on the other side, this pressure is quickly transferred to the other side of the box. It can be seen that when passing through this section without passing at an extremely slow speed, it will cause serious twisting damage to the vehicle body and endanger the safety of the rear box structure. This is especially true when the off-road RV is in unknown road conditions and suddenly encounters a bumpy and pothole-prone section while driving at high speed. Danger is very likely to occur.

[0003] Therefore, how to solve the problem that off-road RVs are prone to twisting and damaging the vehicle ladder, endangering the safety of the rear box structure and being extremely dangerous when passing through bumpy roads at high speed is a key technical problem that technical personnel in this field need to solve. Summary of the Invention

[0004] In order to overcome the problems existing in the related art to at least a certain extent, the purpose of this application is to provide a self-balancing device for a self-propelled off-road RV box, which can solve the problem that when an off-road RV passes through a bumpy road section at high speed, the vehicle ladder is easily damaged by twisting, which endangers the safety of the rear box structure and is extremely dangerous.

[0005] The present application provides a self-balancing device for a self-propelled off-road RV box, comprising a sub-beam body for connecting to the bottom end of the RV box, a front triangular balance beam body for connecting to the RV chassis beam, a rear triangular balance beam body and an axle holding device, the front triangular balance beam body and the rear triangular balance beam body being respectively arranged close to the two ends of the sub-beam body, the axle holding device being arranged between the front triangular balance beam body and the rear triangular balance beam body, and the front triangular balance beam body and the rear triangular balance beam body both including a hard limit structure for limiting the swing angle of the RV box, and the axle holding device including a soft limit structure for resetting the RV box to a horizontal position.

[0006] Preferably, the front triangular balance beam body and the rear triangular balance beam body also include a triangular main beam connected to the sub-beam body and two triangular sub-beams for connecting to the RV chassis beam, and the two triangular sub-beams are respectively arranged at the left and right ends of the triangular main beam and located below the triangular main beam.

[0007] Preferably, two groups of the hard limiting structures are provided, and both groups of the hard limiting structures are fixedly provided on the triangular main beam and are respectively located above the two triangular sub-beams.

[0008] Preferably, the axle holding device also includes an axle holding device for fixedly connecting to the RV chassis frame and an axle holding seat for fixedly connecting to the sub-beam body, the axle holding seat is connected to the axle holding device, and the soft limit structure is arranged between the axle holding device and the axle holding seat.

[0009] Preferably, two shaft-holding devices are provided, and the two shaft-holding devices are respectively provided close to the left and right ends of the sub-beam body.

[0010] Preferably, the hard limiting structure includes two limiting blocks, which are respectively arranged on the front and rear sides of the triangular main beam, and a gap is left between the limiting blocks and the auxiliary beam body.

[0011] Preferably, the soft limiting structure is a rubber gasket sleeved outside the holding shaft.

[0012] Preferably, the sub-beam body includes two longitudinal beams and multiple cross beams located between the two longitudinal beams, the front triangular balance beam body and the rear triangular balance beam body are fixedly connected to the two cross beams close to the front end and rear end of the longitudinal beams respectively, and the axle holding device is fixedly connected to the cross beam located in the middle position of the longitudinal beam.

[0013] Preferably, a plurality of first positioning holes are provided on the cross beam, and second positioning holes corresponding to the first positioning holes are provided on both the front triangular balance beam body and the rear triangular balance beam body.

[0014] Preferably, the axle holding device further includes an axle holding connecting plate for connecting the RV chassis beam and the axle holding device, and the axle holding connecting plate and the axle holding device are an integrated structure.

[0015] The technical solution provided by this application may have the following beneficial effects:

[0016] The present application provides a self-balancing device for a self-propelled off-road RV box, when the RV passes through bumpy roads, the torque generated by the vehicle body itself is transmitted to the chassis beam by the tires, and then transmitted to the front triangular balance beam body and the rear triangular balance beam body by the chassis beam, and a hard limit structure is used to limit the swaying angle of the RV box to be too large, and a shaft holding device is used to perform reverse buffering of inertia and gravity, and a soft limit structure is used to correct the return of the RV box, thereby reducing the danger of the box itself caused by large left and right torques, greatly increasing the passability of the road conditions, and solving the problem that when an off-road RV passes through a bumpy road section at high speed, the vehicle ladder is easily damaged by distortion, the safety of the rear box structure is endangered, and danger is extremely likely to occur.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] Figure 1 is a perspective view of the self-balancing device according to some exemplary embodiments;

[0020] Figure 2 is a top view of the self-balancing device according to some exemplary embodiments;

[0021] Figure 3 is a side view of the self-balancing device according to some exemplary embodiments;

[0022] Figure 4 is a perspective view of a front triangular balance beam body or a rear triangular balance beam body according to some exemplary embodiments;

[0023] Figure 5 is a perspective view of a shaft-holding device according to some exemplary embodiments;

[0024] Figure 6 is a side view of a shaft-holding device according to some exemplary embodiments;

[0025] Figure 7 is a perspective view of an axle-holding seat according to some exemplary embodiments;

[0026] Figure 8 is a perspective view of a shaft-holding device according to some exemplary embodiments.

[0027] In the picture:

[0028] 1. Longitudinal beam; 2. Cross beam; 3. Main body of front triangular balance beam; 4. Axle holding device; 5. Tail cross beam; 6. Side oblique support beam; 7. Main body of rear triangular balance beam; 8. Side oblique support beam pad; 9. Balance beam reinforcement plate; 10. Trapezoidal reinforcement plate; 11. Balance beam fastening bolts; 12. Main board; 13. Balance vertical beam; 14. Vertical beam reinforcement plate; 15. Limit block; 16. Triangular pad; 17. Triangular plate; 18. Triangular reinforcement plate; 19. First positioning hole; 20. Second positioning hole; 21. Axle holding; 22. Connecting main board; 23. Axle holding support seat; 24. First reinforcement plate; 25. Second reinforcement plate; 26. Third reinforcement plate; 27. Fourth reinforcement plate; 28. Fixed plate; 29. ​​Axle holding seat connecting plate; 30. First collet; 31. Second collet; 32. Connecting part; 33. Axle holding seat reinforcement plate. DETAILED DESCRIPTION

[0029] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0030] refer to Figures 1-8 This specific embodiment provides a self-balancing device for a self-propelled off-road RV box, including a sub-beam body, a front triangular balance beam body 3, a rear triangular balance beam body 7 and an axle holding device 4. The sub-beam body is used to connect with the bottom end of the RV box, and the front triangular balance beam body 3, the rear triangular balance beam body 7 and the axle holding device 4 are used to connect with the RV chassis beam, thereby connecting the RV box with the RV chassis.

[0031] Among them, the front triangular balance beam body 3 and the rear triangular balance beam body 7 are respectively arranged close to the two ends of the auxiliary beam body, and the axle holding device 4 is arranged between the front triangular balance beam body 3 and the rear triangular balance beam body 7 to ensure the stability and balance of the connection with the RV chassis.

[0032] The front triangular balance beam body 3 and the rear triangular balance beam body 7 both include a hard limit structure, which is used to limit the swing angle of the RV box body, so as to reduce the danger of the RV box body itself caused by large left and right swinging through the reverse buffering of the front triangular balance beam body 3 and the rear triangular balance beam body 7; the axle holding device 4 includes a soft limit structure, which is used to reset the RV box body to a horizontal position to achieve the return correction of the RV box body.

[0033] With such arrangement, when the RV passes through bumpy roads, the torque generated by the vehicle body itself is transmitted by the tires to the chassis beam, and then transmitted by the chassis beam to the front triangular balance beam body 3 and the rear triangular balance beam body 7. The hard limit structure is used to limit the swing angle of the RV box body from being too large, and the axle holding device 4 is used to perform reverse buffering of inertia and gravity. The soft limit structure is used to correct the return of the RV box body, reducing the danger of the box body itself caused by the large left and right torque, greatly increasing the passability of the road conditions, and solving the problem that off-road RVs are prone to twisting and damaging the vehicle ladder, endangering the safety of the rear box structure, and being extremely dangerous when passing through bumpy roads at high speed.

[0034] In this embodiment, Figure 4As shown, the front triangular balance beam body 3 and the rear triangular balance beam body 7 also include a triangular main beam and two triangular sub-beams. The two triangular sub-beams are respectively arranged at the left and right ends of the triangular main beam, and the two triangular sub-beams are located below the triangular main beam. The triangular main beam is connected to the sub-beam body, and the triangular sub-beam is used to connect to the RV chassis beam, thereby realizing the connection between the sub-beam body and the chassis beam.

[0035] Preferably, two groups of hard limit structures are provided, both groups of hard limit structures are fixedly provided on the triangular main beam, and the two groups of hard limit structures are respectively provided above the two triangular secondary beams, so as to limit the angles of the left and right sides of the RV box body.

[0036] Each set of hard limit structures includes two limit blocks 15, which are respectively arranged on the front and rear sides of the triangular main beam, and a gap is left between the limit blocks 15 and the auxiliary beam body so that the RV box body can swing left and right, and the top of the limit block 15 and the auxiliary beam body can offset each other to limit the swing angle of the RV box body.

[0037] Among them, the triangular main beam includes a main board 12, two parallel balanced vertical beams 13 fixedly arranged above the main board 12, and a vertical beam reinforcement plate 14 arranged between the two balanced vertical beams 13. The two balanced vertical beams 13 are used to connect with the auxiliary beam body; two groups of hard limit structures are fixedly arranged on the main board 12 and are respectively located at the left and right ends of the main board 12. Specifically, the two limit blocks 15 of each group of hard limit structures are respectively arranged at the front and rear ends of the main board 12, and the two balanced vertical beams 13 are clamped in the middle.

[0038] The triangular sub-beam includes a triangular plate 17 and a triangular reinforcement plate 18 for connecting to the RV chassis beam. The triangular plate 17 and the triangular reinforcement plate 18 are fixedly connected to the main board 12. The triangular reinforcement plate 18 is arranged on the side of the triangular plate 17 away from the RV chassis beam to improve the triangular plate 17. A triangular pad 16 is also provided on the side where the triangular plate 17 is connected to the RV chassis beam to avoid wear between the triangular plate 17 and the RV chassis beam.

[0039] In this embodiment, the axle holding device 4 also includes an axle holding device 21 and an axle holding seat. The axle holding device 21 is used to be fixedly connected to the RV chassis frame, and the axle holding seat is used to be fixedly connected to the auxiliary beam body, thereby connecting the auxiliary beam body to the RV chassis frame.

[0040] Among them, the shaft holding 21 is connected to the shaft holding seat, and the soft limit structure is arranged between the shaft holding 21 and the shaft holding seat to realize the return correction of the box body.

[0041] Preferably, if Figure 1As shown, there are two axle holding devices 4, which are respectively arranged near the left and right ends of the auxiliary beam body, that is, there are also two soft limit structures, which are respectively mounted on the two axle holding devices 21 to ensure the balance of the RV box body and enable the RV box body to be reset horizontally.

[0042] Here, the soft limit structure can be a rubber washer, which is sleeved outside the holding shaft 21 to generate elastic force to enable the RV box to return to its original position and correct. Specifically, the rubber washer can be a rubber material or silicone material that is antifreeze, wear-resistant and pressure-resistant, and is not specifically limited here.

[0043] Among them, the axle holding device 4 also includes an axle holding connecting plate, which is used to connect the RV chassis frame and the axle holding 21, and the axle holding 21 and the axle holding connecting plate are an integrated structure.

[0044] Here, as Figure 5 As shown, the axle-holding connecting plate includes a connecting main plate 22 connected to the RV chassis frame, an axle-holding support seat 23 integral with the connecting main plate 22, and an axle-holding reinforcement plate for strengthening the connection strength between the axle-holding support seat 23 and the connecting main plate 22. The axle holding shaft 21 is disposed on the axle-holding support seat 23, with a space left between the axle holding shaft 21 and the axle holding support seat 23 to facilitate connection between the axle holding shaft 21 and the axle holding shaft 21. The axle-holding reinforcement plate includes a first reinforcement plate 24, a second reinforcement plate 25, a third reinforcement plate 26, and a fourth reinforcement plate 27 to improve the connection strength between the axle holding support seat 23 and the connecting main plate 22.

[0045] like Figure 7 As shown, the shaft holding seat includes two shaft holding seat connecting plates 29 for connecting to the sub-beam body, a shaft holding collet provided at the bottom ends of the two shaft holding seat connecting plates 29, and a shaft holding seat reinforcement plate 33 for connecting the two shaft holding seat connecting plates 29. The shaft holding collet includes a first collet 30 and a second collet 31 matching the first collet 30. The front and rear ends of the first collet 30 and the second collet 31 are both provided with connecting portions 32. The connecting portions of the first collet 30 and the second collet 31 are both provided with mounting holes for bolts to pass through, so as to facilitate the connection between the first collet 30 and the second collet 31. The bottom ends of the two shaft holding seat connecting plates 29 are respectively connected to the left and right ends of the first collet 30. The shaft holding seat reinforcement plate 33 is connected to the first collet 30 to strengthen the connection between the shaft holding collet and the shaft holding seat connecting plates 29.

[0046] A fixing plate 28 is also provided at the top of the shaft holding seat connecting plate 29. The top ends of the two shaft holding seat connecting plates 29 are connected to the fixing plate 28. The fixing plate 28 is used to be fixedly connected to the auxiliary beam body.

[0047] In this embodiment, the sub-beam body includes two longitudinal beams 1 and multiple cross beams 2. The multiple cross beams 2 are arranged between the two longitudinal beams 1 and fixedly connected to the longitudinal beams 1. The front triangular balance beam body 3 and the rear triangular balance beam body 7 are respectively fixedly connected to the two cross beams close to the front end and rear end of the longitudinal beam 1. The axle holding device 4 is fixedly connected to the cross beam located in the middle of the longitudinal beam 1 to ensure the stability and balance of the connection between the sub-beam body and the RV chassis beam.

[0048] Among them, a plurality of first positioning holes 19 are provided on the crossbeam 2, and second positioning holes 20 are provided on the front triangular balance beam body 3 and the rear triangular balance beam body 7. The second positioning holes 20 can correspond to the first positioning holes 19 so that the balance beam fastening bolts 11 can pass through the first positioning holes 19 and the second positioning holes 20, thereby connecting the front triangular balance beam body 3 and the rear triangular balance beam body 7 to the crossbeam 2.

[0049] It should be noted that the installation position of the second positioning hole 20 is determined according to the RV model. When installing the front triangular balance beam body 3 and the rear triangular balance beam body 7 of RVs of different models, the first positioning holes 19 corresponding to the second positioning hole 20 are different. Its specific position is not limited here and is determined according to actual conditions.

[0050] Furthermore, the crossbeam 2 connected to the front triangular balance beam body 3 and the rear triangular balance beam body 7 includes a first crossbeam and a second crossbeam. The first and second crossbeams are arranged in parallel, and both ends of the first and second crossbeams are fixedly connected to the two longitudinal beams 1. A plurality of second positioning holes 20 are provided on each of the first and second crossbeams. The first positioning holes 19 are provided on the triangular main beam. Specifically, the first positioning holes 19 are provided on the two vertical balance beams 13 to correspond with the second positioning holes 20, so as to facilitate connection of the first crossbeam, the second crossbeam, and the triangular main beam via the balance beam fastening bolts 11. A space is left between the first and second crossbeams for the triangular main beam to extend into. In this way, the first and second crossbeams can clamp the triangular main beam, thereby improving the stability of the connection between the front triangular balance beam body 3 and the rear triangular balance beam body 7 and the auxiliary beam body. A balance beam reinforcement plate 9 is also provided at the top end of the first cross beam and the second cross beam to connect the front triangular balance beam body and the rear triangular balance beam body, so as to further improve the stability of the connection between the front triangular balance beam body and the rear triangular balance beam body and the auxiliary beam body.

[0051] The crossbeam 2 connected to the shaft holding device 4 also includes a first crossbeam and a second crossbeam. A certain distance is left between the first crossbeam and the second crossbeam for the top end of the shaft holding seat to be embedded. In this way, the first crossbeam and the second crossbeam can play a certain clamping role on the shaft holding seat, thereby improving the stability of the connection between the shaft holding seat and the crossbeam.

[0052] The auxiliary beam body also includes multiple sets of diagonal support beams fixedly connected to the longitudinal beams 1 for connection to the RV body. The multiple sets of diagonal support beams correspond one-to-one with the multiple cross beams 2, and each set of diagonal support beams includes two diagonal support beams 6, which are respectively fixedly connected to the two longitudinal beams 1. Diagonal support beam pads 8 are also provided above the diagonal support beams 6 to prevent wear on the RV body.

[0053] Trapezoidal reinforcement plates 10 are provided at the connections between the left and right ends of the crossbeam 2 and the two longitudinal beams 1 to improve the stability of the connection between the crossbeam 2 and the longitudinal beams 1 .

[0054] Here, the auxiliary beam body further includes a tail cross beam 5 , which is provided at the tail ends (rear ends) of the two longitudinal beams 1 to connect the tail ends of the two longitudinal beams 1 , thereby improving the stability of the auxiliary beam body.

[0055] Combined with the above embodiments, the self-balancing device is specifically analyzed:

[0056] The longitudinal beam 1, cross beam 2, side oblique support beam 6 and each connecting reinforcement plate are positioned and welded to form a sub-beam body, and then installed on the cross beam together with the front triangular balance beam body 3 and the rear triangular balance beam body 7, so that the RV box body can swing left and right, and the first angle is limited by the four limit blocks 15 on the front triangular balance beam body 3 and the rear triangular balance beam body 7, and the axle holder 21 and the axle holder seat are installed on the middle cross beam of the sub-beam body, so that the axle holder seat and the axle holder 21 are locked and fixed, and the rubber gasket provided on the axle holder 21 is used for secondary angle limiting and the horizontal position of the box body is reset. The two triangular plates 17 of the front triangular balance beam body 3 and the rear triangular balance beam body 7 and the connecting main plates 22 of the two axles 21 are all connected to the RV chassis beam to form six connection points. Under bumpy road conditions, the self-balancing device can enable the RV box body to achieve reverse buffering under bumpy road conditions and return to balance.

[0057] Specifically, the front triangular balance beam body 3 and the rear triangular balance beam body 7 are fixed on the RV chassis frame. When the vehicle body passes through bumpy road conditions, the left and right torques generated by the vehicle body itself are transmitted by the tires to the RV chassis frame, and then transmitted by the frame to the front triangular balance beam body 3 and the rear triangular balance beam body 7 and the axle holding device 4 for reverse buffering of inertia and gravity. The two axle holding seats and the axle holding device 21 of the self-balancing device and the special rubber gasket generate positioning elastic rebound to correct the RV box body to its position. The 1-degree free angle limited on the left and right sides of the box body is used to release the left and right torques of the RV box body caused by bumpy road conditions, thereby reducing the danger of the RV box body itself caused by the large left and right torques and greatly increasing the passability of the road conditions.

[0058] The self-balancing device is primarily constructed using sheet metal, welding, and machining, resulting in low-cost manufacturing that significantly increases the vehicle's maneuverability across various road conditions. The self-balancing device significantly reduces the stress caused by swaying by utilizing the vehicle's own weight and the counter-vibration created by the heaving wheel sides. It achieves self-balancing and decompression without the need for electricity, hydraulics, or expensive suspension systems. Its simple structure, easy installation, and manual operation make it widely applicable.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

[0060] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0061] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A self-balancing device for a self-propelled off-road RV box, characterized in that: The invention comprises a sub-beam body for connecting with the bottom end of a recreational vehicle box body, a front triangular balance beam body (3) for connecting with a chassis beam of the recreational vehicle, a rear triangular balance beam body (7) and an axle holding device (4), wherein the front triangular balance beam body (3) and the rear triangular balance beam body (7) are respectively arranged near the two ends of the sub-beam body, the axle holding device (4) is arranged between the front triangular balance beam body (3) and the rear triangular balance beam body (7), and the front triangular balance beam body (3) and the rear triangular balance beam body (7) both comprise a hard limit structure for limiting the swing angle of the recreational vehicle box body, and the axle holding device (4) comprises a soft limit structure for resetting the recreational vehicle box body to a horizontal position; The front triangular balance beam body (3) and the rear triangular balance beam body (7) both further comprise a triangular main beam connected to the auxiliary beam body and two triangular auxiliary beams for connecting to the RV chassis beam, the two triangular auxiliary beams being respectively arranged at the left and right ends of the triangular main beam and located below the triangular main beam; There are two groups of hard limit structures, both of which are fixedly arranged on the triangular main beam and respectively located above the two triangular sub-beams; The hard limit structure comprises two limit blocks (15), the two limit blocks (15) are respectively arranged on the front and rear sides of the triangular main beam, and a gap is left between the limit blocks (15) and the auxiliary beam body; The triangular main beam comprises a main board (12), two parallel balancing vertical beams (13) fixedly arranged above the main board (12), and a vertical beam reinforcement plate (14) arranged between the two balancing vertical beams (13), wherein the two balancing vertical beams (13) are used to be connected to the auxiliary beam body; and two sets of hard limit structures are fixedly arranged on the main board (12) and are respectively located at the left and right ends of the main board (12).

2. The self-balancing device for a self-propelled off-road RV box according to claim 1, characterized in that: The axle holding device (4) further comprises an axle holding device (21) for being fixedly connected to the RV chassis beam and an axle holding seat for being fixedly connected to the auxiliary beam body, the axle holding seat being connected to the axle holding device (21), and the soft limit structure being arranged between the axle holding device (21) and the axle holding seat.

3. The self-balancing device for a self-propelled off-road RV box according to claim 2, characterized in that: Two shaft-holding devices (4) are provided, and the two shaft-holding devices (4) are respectively provided close to the left and right ends of the auxiliary beam body.

4. The self-balancing device for a self-propelled off-road RV box according to claim 3, characterized in that: The soft limiting structure is a rubber gasket sleeved outside the holding shaft (21).

5. The self-balancing device for a self-propelled off-road RV box according to claim 1, characterized in that: The auxiliary beam body comprises two longitudinal beams (1) and a plurality of transverse beams (2) located between the two longitudinal beams (1); the front triangular balance beam body (3) and the rear triangular balance beam body (7) are fixedly connected to the two transverse beams close to the front end and the rear end of the longitudinal beams (1), respectively; and the axle holding device (4) is fixedly connected to the transverse beam located in the middle of the longitudinal beams (1).

6. The self-balancing device for a self-propelled off-road RV box according to claim 5, characterized in that: A plurality of first positioning holes (19) are provided on the crossbeam (2), and second positioning holes (20) corresponding to the first positioning holes (19) are provided on both the front triangular balance beam body (3) and the rear triangular balance beam body (7).

7. The self-balancing device for a self-propelled off-road RV box according to claim 2, characterized in that: The axle-holding device (4) further comprises an axle-holding connecting plate for connecting the RV chassis beam and the axle-holding device (21), wherein the axle-holding connecting plate and the axle-holding device (21) are in an integrated structure.

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