Pull type motor home frame structure and motor home

Abstract

The utility model relates to the technical field of motor home frames, in particular to a pull type motor home frame structure and a motor home. The caravan frame structure comprises a frame body, flying wings and a traction frame. The frame body comprises a cross beam and longitudinal beams on the two sides, and the cross beam is detachably connected with the longitudinal beams; the flying fins are detachably installed on the outer side faces of the longitudinal beams, the top faces of the flying fins are sequentially a connecting face, a transition face and a supporting face, the transition face is an inclined face, the supporting face is higher than the connecting face, concave reinforcing ribs are arranged on the vertical faces of the flying fins, and the top edges of the reinforcing ribs are the same as the top faces of the flying fins in shape. The traction frame comprises a left beam and a right beam, the front ends of the left beam and the right beam intersect at one point, the middles of the left beam and the right beam are detachably connected with the cross beam, and the rear ends of the left beam and the right beam are detachably connected with the longitudinal beam. According to the utility model, rapid production and assembly of the frame are realized, light weight, rapid assembly and convenient transportation are realized, and market requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of RV frames, in particular to a trailer RV frame structure and a RV. Background Art

[0002] The frame structure of an RV is the core part of the RV design. It is not only related to the load-bearing capacity of the RV, but also directly affects the stability and driving safety of the vehicle. With the rise of RV tourism, consumers have higher and higher requirements for the comfort, economy and convenience of RVs. In this context, lightweight, modular, fast assembly and convenient transportation have become important directions for RV frame design.

[0003] At present, most of the domestic RV frames are modified from mature commercial vehicles. There are few types of trailer RVs and small sizes. Most of the frame structures are made of profiles welded as a whole, which has the disadvantages of high material cost, complex process, inconvenient packaging, and not easy long-distance transportation. Specifically, the frame in the prior art is mainly composed of longitudinal beams, cross beams and other components, which are usually connected by welding, which not only increases the manufacturing cost, but also limits the flexibility and transportation convenience of the frame. In addition, the RV frame is equipped with wings connecting the frame and the body. The wings are mainly used to bear the weight of the body, and the side of the wings is riveted and fixed to the RV chassis frame, and the top is connected and fixed to the body with drill nails. In the conventional wing structure, its top surface is mostly an overall plane, and the wing is in overall contact with the body floor, which is easy to cause certain damage to the body on bumpy roads. Utility Model Content

[0004] In view of the deficiencies in the prior art, an object of the embodiments of the present utility model is to provide a frame structure for a trailer-type RV.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] A trailer caravan frame structure comprises: a frame body, flying wings and a traction frame; the frame body comprises a crossbeam and longitudinal beams on both sides, the crossbeam is detachably connected to the longitudinal beam; the flying wings are detachably mounted on the outer side surface of the longitudinal beam, the top surface of the flying wings is a connecting surface, a transition surface and a supporting surface in sequence, the transition surface is an inclined surface, the supporting surface is higher than the connecting surface, the vertical surface of the flying wing is provided with concave reinforcing ribs, the top edge of the reinforcing ribs has the same shape as the top surface of the flying wing; the traction frame comprises a left beam and a right beam, the front ends of the left beam and the right beam intersect at a point, the middle part is detachably connected to the crossbeam, and the rear end is detachably connected to the longitudinal beam.

[0007] Optionally, the crossbeam includes a front crossbeam and a rear crossbeam, the rear crossbeam and the front crossbeam have the same structure, the longitudinal beam includes a left longitudinal beam and a right longitudinal beam, the front crossbeam and the rear crossbeam are located between the left longitudinal beam and the right longitudinal beam and form a frame structure with the longitudinal beams on both sides.

[0008] Optionally, the crossbeam also includes a sheet metal crossbeam and a round steel crossbeam, the sheet metal crossbeam and the round steel crossbeam are located between the front crossbeam and the rear crossbeam, the sheet metal crossbeam is formed by bending a steel plate, the round steel crossbeam includes angle steel and round steel, the angle steel forms a rectangular frame structure, and the round steel is obliquely arranged in the rectangular frame structure.

[0009] Optionally, the cross beam also includes a connecting beam and an anti-collision beam, the connecting beam is located at the front end of the longitudinal beam, and a first connecting angle plate and a first connecting plate are provided on the connecting beam, the first connecting angle plate is detachably connected to the longitudinal beam, and the first connecting plate is detachably connected to the traction frame; the anti-collision beam is located at the rear end of the longitudinal beam, includes a first square tube and a connecting piece located on the side of the first square tube, and the first connecting plate is detachably connected to the longitudinal beam.

[0010] Optionally, the longitudinal beam includes a beam body, an upper support and a lower support, the beam body is Z-shaped and a bend is formed at the end of the beam body, the upper support and the lower support are both L-shaped, the upper support is located on the inner side of the upper end of the beam body, and the lower support is located on the outer side of the lower end of the beam body.

[0011] Optionally, the left beam and the right beam of the traction frame are at a predetermined angle, a supporting square tube is arranged between the left beam and the right beam, and the left beam, the right beam and the supporting square tube constitute an A frame; a battery support is arranged on the rear side of the supporting square tube.

[0012] Optionally, connectors are provided at the front ends of the left beam and the right beam, and a safety chain and a fixing ring are provided at the front end of the traction frame.

[0013] Optionally, a second connecting plate is provided in the middle of the top surface of the left beam and the right beam, and a second connecting angle plate is provided at the rear end of the top surface. The second connecting plate is detachably connected to the connecting beam, the second connecting angle plate is detachably connected to the longitudinal beam, and a support plate is provided at the bottom of the second connecting plate.

[0014] Optionally, the frame structure also includes a step support and a leg support, wherein the step support is detachably mounted on the outer side of the frame body, the leg support is detachably mounted on the bottom side of the frame body, the leg support includes a bottom plate, a square tube is provided on the bottom plate, and a baffle is provided at the end of the square tube.

[0015] An embodiment of the utility model further provides a motorhome, comprising a vehicle body and the trailer-type motorhome frame structure as described above.

[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0017] 1. The frame body of the frame structure, as well as the frame body, wing and traction frame are designed to be modular and detachable, which enables rapid production and assembly of the frame. It is also convenient for scattered packaging and suitable for long-distance transportation. It achieves lightweight, rapid assembly and convenient transportation to meet market demand.

[0018] 2. By setting the flying wing on the outside of the longitudinal beam, the upper plane of the flying wing forms a streamlined curvature by the connecting surface, transition surface and supporting surface, which can play an effective role in buffering and shock absorption. Under the effect of the streamlined curvature, the stress concentration can be effectively reduced when the body and the chassis frame are in contact, so that the stress can be released and no damage will be caused to the body. The streamlined curvature of the flying wing can also improve its overall strength performance, which is 80% higher than the strength of the overall plane. Further reinforcement ribs are added to ensure that the flying wing has a stronger load-bearing strength and a lighter design under the same material and thickness. The top curvature of the reinforcement rib is consistent with the curvature of the upper plane of the flying wing, which greatly improves the strength of the entire flying wing and evenly distributes the buffering and shock absorption functions.

[0019] Additional advantages of the present invention will be given in the following description, and some will become apparent from the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the frame structure provided by an embodiment of the utility model;

[0022] Figure 2 This is a first-person perspective schematic diagram of a flying wing provided by an embodiment of the utility model;

[0023] Figure 3 is a schematic diagram of a flying wing provided by an embodiment of the utility model from a second viewing angle;

[0024] Figure 4 It is an axonometric view of the front crossbeam provided in an embodiment of the utility model;

[0025] Figure 5 It is a side view of the front crossbeam provided by an embodiment of the utility model;

[0026] Figure 6 It is a schematic diagram of a sheet metal crossbeam provided in an embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of a round steel beam provided in an embodiment of the utility model;

[0028] Figure 8This is a schematic diagram of a connecting beam provided by an embodiment of the utility model;

[0029] Fig. 9 It is a schematic diagram of an anti-collision beam provided by an embodiment of the utility model;

[0030] Fig.10 It is a schematic diagram of a longitudinal beam provided in an embodiment of the utility model;

[0031] Fig.11 It is a side view of the installation of the longitudinal beam provided by the embodiment of the utility model;

[0032] Fig.12 It is a schematic diagram of a traction frame provided by an embodiment of the utility model;

[0033] Fig.13 It is a schematic diagram of a stepped support provided by an embodiment of the utility model;

[0034] Fig.14 It is a schematic diagram of a leg support provided by an embodiment of the utility model;

[0035] Fig.15 It is a CAE simulation schematic diagram of a wing without reinforcing ribs provided by an embodiment of the utility model;

[0036] Fig.16 It is a CAE simulation schematic diagram of a wing with reinforcement ribs provided by an embodiment of the utility model;

[0037] In the figure: 1, frame body; 11, connecting beam; 111, first connecting angle plate; 112, first connecting plate; 12, left longitudinal beam; 121, beam body; 122, upper support; 123, lower support; 13, sheet metal cross beam; 14, round steel cross beam; 141, angle steel; 142, round steel; 15, anti-collision beam; 151, first square tube; 152, connecting piece; 16, rear cross beam; 17, front cross beam; 18, right longitudinal beam beam; 2, wing; 21, connection surface; 22, transition surface; 23, support surface; 24, reinforcement rib; 3, traction frame; 31, second connection angle plate; 32, second connection plate; 33, right beam; 34, connector; 35, safety chain; 36, fixing ring; 37, supporting square tube; 38, left beam; 39, supporting plate; 4, step support; 5, outrigger bracket; 51, bottom plate; 52, second square tube; 53, baffle;

[0038] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] In order to solve the technical problems mentioned in the background technology, the utility model proposes a trailer-type RV frame structure, the size of which can range from a few meters to more than ten meters. The RV frame adopts a modular design, which is convenient for transportation and can be quickly assembled.

[0041] like Figure 1 As shown, the RV frame structure includes a frame body 1, a wing 2 and a traction frame 3; the frame body 1 includes a crossbeam and longitudinal beams on both sides, and the crossbeam is detachably connected to the longitudinal beam; Figure 2 , Figure 3 As shown, the fin 2 is detachably mounted on the outer side of the longitudinal beam, and the top surface of the fin 2 is a connecting surface 21, a transition surface 22 and a supporting surface 23 in sequence, wherein the transition surface 22 is an inclined surface, and the supporting surface 23 is higher than the connecting surface 21. The vertical surface of the fin 2 is provided with a concave reinforcing rib 24, and the top edge of the reinforcing rib 24 has the same shape as the top surface of the fin 2; Fig.12 As shown, the traction frame 3 includes a left beam 38 and a right beam 33. The front ends of the left beam 38 and the right beam 33 intersect at one point, the middle portion is detachably connected to the cross beam, and the rear end is detachably connected to the longitudinal beam.

[0042] The frame body 1 of the frame structure, as well as the frame body 1 and the wings 2 and the traction frame 3 are designed to be modular and detachable, thereby achieving rapid production and assembly of the frame, while facilitating scattered packaging and being suitable for long-distance transportation, achieving lightweight, rapid assembly and convenient transportation to meet market demand.

[0043] The flying wing 2 is fixed to the outside of the longitudinal beam and is the main structure connecting the frame and the upper part of the RV. The flying wing 2 is formed in one piece by a high-strength steel plate, and is provided with reinforcing ribs 24, upper mounting fixing holes and frame fixing holes and other structures. The adjacent edges are welded and connected to the left longitudinal beam 12 and the right longitudinal beam 18 with Hack bolts. Its position can change with the specific needs of the RV upper part.

[0044] By arranging the fin 2 on the outside of the longitudinal beam, the upper plane of the fin 2 forms a streamlined curvature by the connecting surface 21, the transition surface 22 and the supporting surface 23, which can play an effective role in buffering and shock absorption. Under the effect of the streamlined curvature, the stress concentration can be effectively reduced when the body and the chassis frame contact, so that the stress is released and no damage is caused to the body. The streamlined curvature of the fin 2 can also improve its overall strength performance, which is 80% higher than the strength of the overall plane.

[0045] The stamping reinforcement rib 24 is added to ensure that the wing 2 has a stronger load-bearing strength and a lighter design than other wing 2 with the same material and thickness. The wing 2 is integrally formed using a stamping process to improve the strength performance of the wing 2, which can not only reduce processing costs, but also maximize its load-bearing strength. The curvature of the reinforcement rib 24 is consistent with the curvature of the upper plane of the wing 2, which greatly improves the strength of the entire wing 2 and evenly distributes the buffering and shock absorption functions.

[0046] At the same time Fig.15 , Fig.16 As shown, the added reinforcement ribs 24 also significantly improve the strength of the wing 2 compared to the wing without reinforcement ribs 24. According to CAE simulation analysis, the strength of the wing 2 with the added reinforcement ribs 24 is increased by 90% compared to the wing without reinforcement ribs 24. The state stress with reinforcement ribs 24 is smaller than that without reinforcement ribs 24, and the bearing capacity effect is good.

[0047] like Figure 1 , Figure 4 , Figure 5 As shown, the cross beam includes a front cross beam 17 and a rear cross beam 16, and the rear cross beam 16 and the front cross beam 17 have the same structure. The longitudinal beam includes a left longitudinal beam 12 and a right longitudinal beam 18, and the front cross beam 17 and the rear cross beam 16 are located between the left longitudinal beam 12 and the right longitudinal beam 18 and form a frame structure with the longitudinal beams on both sides.

[0048] The front cross beam 17 and the rear cross beam 16 are both formed by bending high-strength steel plates, with a Z-shaped cross section. Adjacent bent edges and corners are welded, and holes are provided on the bent surfaces at both ends. They are connected to the left longitudinal beam 12 and the right longitudinal beam 18 with Hake bolts.

[0049] like Figure 1 , Figure 6 , Figure 7 As shown, the cross beam also includes a sheet metal cross beam 13 and a round steel cross beam 14, the sheet metal cross beam 13 and the round steel cross beam 14 are located between the front cross beam 17 and the rear cross beam 16, the sheet metal cross beam 13 is formed by bending a steel plate, the round steel cross beam 14 includes an angle steel 141 and a round steel 142, the angle steel 141 forms a rectangular frame structure, and the round steel 142 is arranged obliquely in the rectangular frame structure. The sheet metal cross beam 13 and the round steel cross beam 14 are both connected to the left longitudinal beam 12 and the right longitudinal beam 18 by Hake bolts, and the positions of the two cross beams can be changed according to the actual needs of different RVs.

[0050] The sheet metal crossbeam 13 is mainly used to fix larger parts such as the RV water tank and sewage tank. It is made of high-strength steel plate and bent. The cross section is Z-shaped. The adjacent bent edges are welded. The bent surfaces at both ends are provided with holes for connection with the longitudinal beams. The main surface of the crossbeam is provided with holes of various specifications for wiring and other purposes, and the upper end surface is also provided with holes for matching with the RV upper body.

[0051] The round steel crossbeam 14 is mainly used to strengthen the rigidity and strength of the overall frame. It is mainly welded by angle steel 141 and round steel 142, and supports and strengthens the overall frame. The left and right end surfaces are provided with matching holes for connecting with the left longitudinal beam 12 and the right longitudinal beam 18. The round steel crossbeam 14 is welded as a whole by profiles. It can be cut and used by standard profiles without secondary processing, which reduces the processing difficulty and cost, improves the use strength, and makes the overall crossbeam more stable. The welding of round steel 142 diagonal braces can make the entire crossbeam more stable and support the overall strength of the frame. The overall design is lightweight. Compared with the sheet metal bending crossbeam, it has lighter weight and better plasticity. The position of the diagonal ribs can be flexibly adjusted according to the threading holes and pipelines to be reserved in the frame, and the positioning can be adjusted when assembling with other components.

[0052] There are three round steel beams 14 at different positions of the whole frame, and they are reinforced at the axle position. Due to the torsion and shear forces at the axle, the weight needs to be reduced and the strength needs to be increased accordingly. This design meets the use function of the whole frame. In other different positions, water tanks, batteries and other components need to be installed, and the beams are made into sheet metal beams 13 accordingly, with assembly holes to match the reasonable installation of water tanks, etc.

[0053] Through the synergistic effect of the sheet metal cross beam 13 and the round steel cross beam 14, not only the strength requirement of the overall frame is guaranteed, but also the installation requirements of the auxiliary accessories are met, thereby achieving more efficient performance.

[0054] like Figure 1 , Figure 8 , Fig. 9 As shown, the cross beam also includes a connecting beam 11 and an anti-collision beam 15. The connecting beam 11 is located at the front end of the longitudinal beam. A first connecting angle plate 111 and a first connecting plate 112 are provided on the connecting beam 11. The first connecting angle plate 111 is detachably connected to the longitudinal beam, and the first connecting plate 112 is detachably connected to the traction frame 3. The anti-collision beam 15 is located at the rear end of the longitudinal beam, and includes a first square tube 151 and a connecting piece 152 located on the side of the first square tube 151. The first connecting plate 112 is detachably connected to the longitudinal beam.

[0055] The connecting beam 11 is the frontmost cross beam of the frame, and plays an important role in connecting the A frame and the longitudinal beam. The main body is made of high-strength steel plate by bending, and the adjacent bending edges are welded to increase the overall rigidity. The first connecting plate 112 and the first connecting angle plate 111 are welded on it, and a reinforcing plate is welded inside the first connecting plate 112. The reinforcing plate is a sheet metal bending structure, which is welded together with the first connecting plate 112. The first connecting plate 112 is a component connecting the A frame and the rear frame, and has holes for riveting, which cooperates with the second connecting plate 32 on the A frame for riveting.

[0056] The first connecting angle plate 111 is located on the left and right sides of the connecting beam 11 and is made of angle steel 141. One side of the first connecting angle plate 111 is welded or riveted to the connecting beam 11 as a whole, and the other side is connected to the left longitudinal beam 12 and the right longitudinal beam 18 of the frame by Hake bolts.

[0057] The anti-collision beam 15 is located at the rear end of the frame, and is mainly used to absorb the energy of the rear end of the RV when it collides, protecting the vehicle body and passengers. The anti-collision beam 15 is welded by a first square tube 151 and a sheet metal connector 152, and the connector 152 is connected to the left longitudinal beam 12 and the right longitudinal beam 18 by a Hake bolt.

[0058] like Fig.10 , Fig.11 As shown, the longitudinal beam includes a beam body 121, an upper support 122 and a lower support 123. The beam body 121 is Z-shaped and a bend is formed at the end of the beam body 121. The upper support 122 and the lower support 123 are both L-shaped. The upper support 122 is located on the inner side of the upper end of the beam body 121, and the lower support 123 is located on the outer side of the lower end of the beam body 121.

[0059] The longitudinal beam is the main load-bearing structure of the frame, and its rigidity and strength directly affect the overall quality of the RV. In the frame, the left longitudinal beam 12 and the right longitudinal beam 18 are both made of "Z"-shaped sheet metal structure, which are integrally formed by rolling or bending technology to ensure the overall strength of the longitudinal beam. Compared with multi-section longitudinal beams, the longitudinal beam assembly process is reduced and the overall assembly efficiency is improved.

[0060] In conventional designs, the rigidity and strength of the longitudinal beams are generally increased by increasing the cross-sectional height and thickness of the longitudinal beams, but this will also increase a large part of the weight and have little effect on improving the overall performance. In order to control the weight increase as much as possible, the upper and lower "L"-shaped supports are creatively used as the reinforcement structure of the left longitudinal beam 12 and the right longitudinal beam 18 in this frame. The supports fit tightly with the longitudinal beams and are connected by welding or riveting. Through CAE simulation analysis, it is found that it has a significant improvement in the overall rigidity of the frame.

[0061] The "L"-shaped support can be moved to different positions on the longitudinal beam to bear axles of different weights, and the axle loads are 7,000 pounds, 8,800 pounds, 10,200 pounds, etc. By adjusting the "L"-shaped support to different positions, it can carry different weights of the vehicle body, effectively improving the efficiency of the frame, and realizing a multi-purpose function, which can not only save costs, but also improve the overall load-bearing strength of the frame. Compared with structures that cannot change their position, there are more possibilities, which has more advantages in reducing costs and improving performance.

[0062] like Fig.12As shown, the left beam 38 and the right beam 33 of the traction frame 3 are at a predetermined angle, and a supporting square tube 37 is arranged between the left beam 38 and the right beam 33. The left beam 38, the right beam 33 and the supporting square tube 37 constitute an A frame; a battery support is arranged on the rear side of the supporting square tube 37. A connector 34 is arranged at the front end of the left beam 38 and the right beam 33, and a safety chain 35 and a fixing ring 36 are arranged at the front end of the traction frame 3. A second connecting plate 32 is arranged in the middle of the top surface of the left beam 38 and the right beam 33, and a second connecting angle plate 31 is arranged at the rear end of the top surface. The second connecting plate 32 is detachably connected to the connecting beam 11, and the second connecting angle plate 31 is detachably connected to the longitudinal beam, and a supporting plate 39 is arranged at the bottom of the second connecting plate 32.

[0063] The A-frame is located at the front end of the frame and is the connecting component between the frame and the tractor. It is mainly composed of a connector 34, a safety chain 35, a left beam 38, a right beam 33, a second connecting plate 32, a supporting square tube 37 and a battery support.

[0064] The connector 34 is located at the front end of the A frame, and is generally made of high-strength steel by integral stamping or casting. The front end has a ball head structure that cooperates with the traction mechanism and is equipped with a quick locking mechanism for easy installation and removal; the rear end is A-shaped, and is riveted to the left beam 38 and the right beam 33 through the Hack bolts on the top and the left and right sides to form an integrated structure. The safety chain 35 is a safety facility to prevent the connector 34 from failing during the movement of the trailer caravan. The safety chain 35 is composed of two chains with safety locks, one end of which is riveted to the left beam 38 and the right beam 33 through the safety chain 35 fixing ring 36, and the other end is connected to the rear of the tractor through the safety lock to ensure that the trailer caravan will not be separated from the tractor when the connector 34 fails.

[0065] The left beam 38 and the right beam 33 are the main load-bearing structures of the A frame, and are composed of two high-strength steel rectangular square tubes. Rectangular baffles 53 are welded at both ends of the square tubes. The left beam 38 and the right beam 33 are riveted into a whole through the connector 34, the supporting square tube 37 and the battery connector 152.

[0066] The supporting square tube 37 is welded from a rectangular tube and sheet metal, and is riveted to the left beam 38 and the right beam 33 by Hack bolts, which strengthens the overall strength of the A frame. The two battery supports are bent from sheet metal, and are riveted to the left beam 38 and the right beam 33 by Hack bolts, and are used to fix the battery and other components that provide power to the RV;

[0067] The second connecting plate 32 and the second connecting angle plate 31 are both welded to the left beam 38 and the right beam 33. They are the parts that connect the A frame with the frame connecting beam 11, the left longitudinal beam 12 and the right longitudinal beam 18. They are provided with connecting holes. The A frame is connected to the rear frame as a whole by Hake bolts to form a frame structure. In order to strengthen the strength of the second connecting angle plate 31, an L-shaped support plate 39 is welded underneath it.

[0068] like Figure 1 As shown, the frame structure further includes a step support 4 and a leg support 5 . The step support 4 can be detachably mounted on the outer side of the frame body 1 , and the leg support 5 can be detachably mounted on the bottom side of the frame body 1 .

[0069] like Fig.13 As shown, the step support 4 is similar in structure to the wing 2 and is mainly used to fix the step foot of the RV. At the same time, its upper end surface is also provided with a fixing hole connected to the RV upper body. The whole is also made of sheet metal bending and welding.

[0070] like Fig.14 As shown, the leg bracket 5 includes a bottom plate 51, a second square tube 52 is provided on the bottom plate 51, and a baffle 53 is provided at the end of the second square tube 52. The leg bracket 5 is a structure for fixing the legs of the RV, and is located at the four corners of the bottom of the frame; when the RV is parked, the four RV legs need to be opened to stabilize the RV body and prevent the RV from slipping due to uneven road surface or other reasons; the leg bracket 5 is welded by the second square tube 52 and a steel plate, and a fixing hole connected to the frame longitudinal beam is provided on the square tube, and a hole for connecting the RV legs is provided on the steel plate.

[0071] In summary, the RV frame of this embodiment is mainly composed of an A-frame, longitudinal beams, cross beams, fins 2, anti-collision beams 15 and other parts. The overall structure is formed of a high-strength steel plate in one piece. The A-frame is located at the front end of the frame and is the part that connects the tractor and the frame body.

[0072] The longitudinal beam is composed of two longitudinal beams on the left and right sides, which runs through the front and rear of the frame and is the main supporting structure of the frame. The longitudinal beam creatively adopts "Z"-shaped sheet metal and "L"-shaped supporting structure, which can minimize the overall weight of the frame while ensuring the overall rigidity and strength of the frame. It carries most of the weight of the RV, and its rigidity and strength have a decisive influence on the performance of the entire frame; the front and rear cross beams 16 and other cross beams are connected to the left longitudinal beam 12 and the right longitudinal beam 18 at both ends, and together with the longitudinal beams, they form the entire frame structure of the frame; the flying wing 2 is fixed to the outside of the left longitudinal beam 12 and the right longitudinal beam 18, and is the main structure connecting the frame and the upper part of the RV; the anti-collision beam 15 is located at the rear end of the frame, mainly to absorb the energy during the collision and protect the body and passengers.

[0073] The frame structure of this large trailer RV can range in size from a few meters to more than ten meters. Through the use of modular design, the overall assembly uses Hake bolt riveting and local welding technology to achieve rapid production and assembly of the frame, while facilitating scattered packaging, suitable for long-distance transportation, and reducing transportation costs. The integrated frame structure further improves the frame's load-bearing strength and torsion resistance, and the middle crossbeam structure is optimized to effectively reduce the frame's weight, achieving lightweight frames and reducing production costs.

[0074] Based on the above-mentioned frame structure, an embodiment of the utility model also provides a motorhome, which includes a body and a frame structure, which can not only improve the economic benefits and market competitiveness of the motorhome, but also provide users with a more comfortable, safe and convenient motorhome travel experience.

[0075] Although the above describes the specific implementation methods of the utility model in conjunction with the accompanying drawings, it is not intended to limit the protection scope of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the protection scope of the utility model.

Claims

1. A trailer RV frame structure, characterized in that: include: The frame body, fins and towing frame; The frame body comprises a crossbeam and longitudinal beams on both sides, and the crossbeam is detachably connected to the longitudinal beams; The fin is detachably mounted on the outer side of the longitudinal beam, the top surface of the fin is a connecting surface, a transition surface and a supporting surface in sequence, the transition surface is an inclined surface, the supporting surface is higher than the connecting surface, and the vertical surface of the fin is provided with a concave reinforcing rib, the top edge of the reinforcing rib is the same shape as the top surface of the fin; The traction frame comprises a left beam and a right beam, the front ends of the left beam and the right beam intersect at one point, the middle part is detachably connected to the cross beam, and the rear end is detachably connected to the longitudinal beam.

2. The trailer caravan frame structure according to claim 1, characterized in that: The cross beam comprises a front cross beam and a rear cross beam, the rear cross beam and the front cross beam have the same structure, the longitudinal beam comprises a left longitudinal beam and a right longitudinal beam, the front cross beam and the rear cross beam are located between the left longitudinal beam and the right longitudinal beam and form a frame structure with the longitudinal beams on both sides.

3. The trailer caravan frame structure as claimed in claim 2, characterized in that: The crossbeam also includes a sheet metal crossbeam and a round steel crossbeam, the sheet metal crossbeam and the round steel crossbeam are located between the front crossbeam and the rear crossbeam, the sheet metal crossbeam is formed by bending a steel plate, the round steel crossbeam includes an angle steel and a round steel, the angle steel forms a rectangular frame structure, and the round steel is obliquely arranged in the rectangular frame structure.

4. The trailer caravan frame structure as claimed in claim 2, characterized in that: The cross beam also includes a connecting beam and an anti-collision beam. The connecting beam is located at the front end of the longitudinal beam. A first connecting angle plate and a first connecting plate are provided on the connecting beam. The first connecting angle plate is detachably connected to the longitudinal beam, and the first connecting plate is detachably connected to the traction frame. The anti-collision beam is located at the rear end of the longitudinal beam, includes a first square tube and a connecting piece located on the side of the first square tube, and the first connecting plate is detachably connected to the longitudinal beam.

5. The trailer caravan frame structure according to claim 1, characterized in that: The longitudinal beam includes a beam body, an upper support and a lower support. The beam body is Z-shaped and a bend is formed at the end of the beam body. The upper support and the lower support are both L-shaped. The upper support is located on the inner side of the upper end of the beam body, and the lower support is located on the outer side of the lower end of the beam body.

6. The trailer caravan frame structure according to claim 1, characterized in that: The left beam and the right beam of the traction frame are at a predetermined angle, a supporting square tube is arranged between the left beam and the right beam, and the left beam, the right beam and the supporting square tube constitute an A frame; a battery support is arranged on the rear side of the supporting square tube.

7. The trailer caravan frame structure according to claim 1, characterized in that: Connectors are arranged at the front ends of the left beam and the right beam, and a safety chain and a fixing ring are arranged at the front end of the traction frame.

8. The trailer caravan frame structure as claimed in claim 4, characterized in that: A second connecting plate is arranged in the middle of the top surface of the left beam and the right beam, and a second connecting angle plate is arranged at the rear end of the top surface. The second connecting plate is detachably connected to the connecting beam, the second connecting angle plate is detachably connected to the longitudinal beam, and a support plate is arranged at the bottom of the second connecting plate.

9. The trailer caravan frame structure according to claim 1, characterized in that: The frame structure also includes a step support and a leg support, wherein the step support is detachably mounted on the outer side of the frame body, the leg support is detachably mounted on the bottom side of the frame body, the leg support includes a bottom plate, a second square tube is arranged on the bottom plate, and a baffle is arranged at the end of the second square tube.

10. A motorhome, characterized in that: It comprises a vehicle body and a trailer caravan frame structure as described in any one of claims 1 to 9.

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