A multi-vehicle type and anti-corrosion RV towing device and vehicle

Abstract

The application relates to the technical field of motor home design, and discloses a motor home traction device suitable for multiple vehicle types and capable of preventing corrosion and a vehicle, which comprises a cross beam, two mounting assemblies arranged on the cross beam and having a designed distance between the two mounting assemblies for fixed connection with a target vehicle body, a connecting frame fixedly arranged on the cross beam and provided with a square opening, and a connecting pipe used for connection with a trailer hook. The connecting pipe penetrates through the square opening, and the connecting part in the square opening is in abutting contact with the top corner of the square opening and has a reserved gap between the outer wall and the inner wall of the square opening to form a channel for the flow of electrophoretic liquid. The connecting part of the connecting pipe is in abutting contact with the top corner of the square opening, a reserved gap is formed for the flow of electrophoretic liquid, and the problem of poor electrophoresis and corrosion caused by hidden micro gaps is solved; meanwhile, the distance between the mounting assemblies is adjustable, and multiple vehicle types can be adapted.

Description

Technical Field

[0001] This invention relates to the field of RV design technology, specifically to an RV towing device and vehicle that is applicable to multiple vehicle models and is corrosion resistant. Background Technology

[0002] With the increasing popularity of recreational activities such as RV travel and outdoor camping, vehicle trailer systems have become an essential feature to meet diverse travel needs. Whether towing a motorhome, a small trailer, or carrying large items such as bicycles and storage boxes, a reliable trailer hitch is required at the rear of the vehicle. Therefore, the industry demands high strength, high durability, and good corrosion resistance from trailer systems, while also hoping they can adapt to the installation requirements of different vehicle models and reduce development and manufacturing costs. In existing technologies, common trailer systems typically employ a vehicle-specific integrated design. For example, a square interface (referred to as a square opening) is fixed to the main beam, and a connecting pipe passes through the square opening. This connecting pipe serves as the connection base for the trailer hitch, which is detachably connected to the connecting pipe via a pin or other means. The square opening and the connecting pipe are usually fixed by welding or a tight fit to ensure the strength and rigidity of the connection. (1) Due to manufacturing process errors, it is difficult to achieve a complete fit between the inner wall of the square opening and the outer wall of the connecting pipe, and a small assembly gap inevitably exists between them. This gap is extremely hidden, and the electrophoretic liquid cannot enter it for effective coating, while moisture can easily penetrate and accumulate in the gap, thus causing local corrosion. Corrosion not only affects the appearance quality, but may also reduce the structural strength over time, posing a safety hazard; (2) The dedicated design for specific vehicles means that different models cannot share the same towing system. Each model needs to be developed independently, which significantly increases the R&D cycle and manufacturing cost. In addition, the product is large in size and heavy in weight, which is not conducive to lightweighting. Summary of the Invention

[0003] This application provides a RV towing device and vehicle that are applicable to multiple vehicle models and are corrosion resistant, solving the technical problems of poor versatility caused by the vehicle-specific design of the existing technology, and the difficulty in detecting the small gap between the square end and the reinforcing member, which leads to poor electrophoresis and corrosion.

[0004] In a first aspect, embodiments of this application provide a RV towing device applicable to multiple vehicle models and corrosion resistant, comprising: beam; Two mounting components are mounted on the crossbeam and are spaced apart by a design for a fixed connection to the vehicle body of the target width. The connecting frame is fixed on the crossbeam and has a square opening; A connecting tube is used to connect to a trailer hook; the connecting tube passes through a square opening, and the connecting part is located inside the square opening; the connecting part abuts against the apex corner of the square opening, and there is a reserved gap between the outer wall and the inner wall of the square opening to form a channel for the flow of electrophoretic fluid.

[0005] In conjunction with the first aspect, in one embodiment, the radial cross-section of the connecting part is a quadrilateral structure, wherein the four vertices respectively abut against the vertices of the square opening; The top and bottom edges of the quadrilateral structure are straight, and both the top and bottom edges fit into the corresponding inner wall of the square opening; the two sides of the quadrilateral structure are curved, and the curved lines are at a predetermined distance from the inner wall of the square opening; there is a reserved gap between the curved side of the connecting part and the corresponding inner wall of the square opening.

[0006] In conjunction with the first aspect, in one embodiment, the preset distance between the arc and the inner wall of the square opening gradually increases from the bottom along a first direction and from the top along a second direction, reaching a preset maximum distance at the middle of the arc; wherein, the direction perpendicular to the top edge from the bottom edge is the first direction, and the direction perpendicular to the bottom edge from the top edge is the second direction.

[0007] In conjunction with the first aspect, in one embodiment, the inner wall of the square opening corresponding to the arc is provided with a recess; A gap is reserved between the concave part and the side where the arc of the connecting part is located.

[0008] In conjunction with the first aspect, in one embodiment, the mounting component includes a connecting plate; The connecting plate is fixed to the protected crossbeam by setting a first opening adapted to the radial section of the crossbeam; the connecting plate is provided with multiple first bolt holes and is detachably connected to the vehicle body by bolts.

[0009] In conjunction with the first aspect, in one embodiment, the mounting assembly further includes a reinforcing plate and an L-shaped plate; One side of the L-shaped plate is fixed to the protected crossbeam by setting a second opening adapted to the radial section of the crossbeam, and the other side is attached to the top of the crossbeam. A second bolt hole is provided on the top side of the crossbeam, and it is detachably connected to the vehicle body by bolts. One side of the reinforcing plate is attached to the side of the crossbeam, and both sides are fixedly connected to the L-shaped plate and the connecting plate, respectively.

[0010] In conjunction with the first aspect, in one embodiment, the bottom and top of the crossbeam are respectively provided with a bottom opening and a top opening, and the L-shaped plate is provided with a third opening corresponding to the top opening on the side of the crossbeam located at the top. The crossbeam is detachably connected to the vehicle body by bolts passing through the bottom opening, the top opening, and the third opening in sequence.

[0011] In conjunction with the first aspect, in one embodiment, the connecting pipe is provided with a locking pin hole; The trailer hook is inserted into the connecting tube, and a straight rod passes through the locking pin hole and the corresponding hole on the trailer hook to achieve detachable fixation.

[0012] In conjunction with the first aspect, in one embodiment, a limiting bolt is also provided at the bottom of the connecting pipe. The limiting bolt passes through the bottom wall of the connecting pipe in a vertical direction and abuts against the lower surface of the trailer hook to apply an upward preload to the trailer hook.

[0013] Secondly, embodiments of this application provide a vehicle that utilizes the multi-model and corrosion-resistant RV towing device described in the first aspect.

[0014] The beneficial effects of the technical solutions provided in this application include: This paper proposes a corrosion-resistant RV towing device suitable for multiple vehicle models. In existing technologies, due to manufacturing errors, the tiny gap between the square opening and the connecting pipe is highly concealed and difficult to detect with the naked eye. Furthermore, the industry generally believes that the tighter the fit between the square opening and the connecting pipe, and the smaller the gap, the higher the structural strength. Therefore, the long-standing neglect of this tiny gap has led to the inability of the electrophoretic fluid to enter, while moisture can penetrate and cause corrosion. This application breaks with this conventional thinking by designing the connecting part of the connecting pipe to only contact the four apex corners of the square opening. This creates a pre-set, visible gap between the outer wall of the connecting pipe and the inner wall of the square opening. The apex corner contact ensures the positioning and force transmission of the connecting pipe within the square opening, while the pre-set gap allows the electrophoretic fluid to flow smoothly and cover all surfaces, thus solving the corrosion problem that has been long overlooked due to the concealed gap. Secondly, there is a design distance between the two mounting components, which can be preset according to the width of the target vehicle model, thereby adapting to vehicles with different widths. The standardization of the main structure is achieved by adjusting the spacing of the mounting components, which reduces R&D and manufacturing costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the RV towing device provided in the embodiments of this application; Figure 2 A front structural diagram of the connecting frame and connecting pipe provided in an embodiment of this application; Figure 3For existing technology regarding Figure 2 A partial cross-sectional structural diagram of AA is shown; Figure 4 for Figure 2 A partial cross-sectional structural diagram of AA; Figure 5 A side view of the installation scenario for the installation components provided in the embodiments of this application; Figure 6 A bottom view of the installation scenario for the installation components provided in the embodiments of this application; Figure 7 This is a side view of the RV towing device provided in an embodiment of this application; Figure 8 This is a side view of the RV towing device connected to the trailer hook provided in an embodiment of this application.

[0017] In the diagram: 1. Crossbeam; 2. Mounting assembly; 21. Connecting plate; 211. First bolt hole; 22. Reinforcing plate; 23. L-shaped plate; 3. Connecting frame; 31. Square opening; 4. Connecting pipe; 41. Connecting part; 42. Locking pin hole; 43. Straight rod; 44. Limiting bolt; 5. Vehicle body; 6. Tow hook; 7. Reserved clearance; 8. Bolt. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0019] To make the technical problem that this application aims to solve clearer, the causes of the technical problem will be analyzed in detail below: Firstly, there is the issue of corrosion prevention at the joint between the connecting frame 3 and the connecting pipe 4. In existing technologies, the joint between the connecting frame 3 and the connecting pipe 4 is usually achieved through welding or tight insertion. Due to manufacturing process errors, a small assembly gap inevitably occurs between the inner wall of the square opening 31 of the connecting frame 3 and the outer wall of the connecting pipe 4. This gap has the following characteristics, making it a corrosion blind spot: it is usually only 0.1~0.5 mm, and after assembly, it is obscured by the external structure, making it difficult to detect during quality inspection. During electrophoretic coating, the electrophoretic solution enters the workpiece surface by relying on the electric field force and liquid flow. For narrow gaps, the surface tension and flow resistance of the electrophoretic solution prevent it from penetrating effectively, resulting in the inability to form a complete electrophoretic coating on the inner surface of the gap. In contrast to the electrophoretic solution, water vapor molecules have extremely small diameters and can easily enter this tiny gap through capillary action. Once water vapor enters, due to the lack of protection from the electrophoretic coating within the gap, the metal surface is directly exposed to the humid environment, making it highly susceptible to electrochemical corrosion. The expansion of rust products further widens the gap, accelerating the entry of moisture and oxygen, creating a vicious cycle. Over time, corrosion will spread from the inside of the gaps outwards, eventually affecting the appearance quality and structural strength. Furthermore, for a long time, those skilled in the art have generally pursued a tight fit between the connecting bracket 3 and the connecting pipe 4, believing that the smaller the gap and the tighter the fit, the higher the structural rigidity and the more reliable the connection. This ingrained thinking has led the industry to overlook the corrosion risks posed by minute gaps and to fail to recognize the contradiction between a tight fit and corrosion prevention requirements.

[0020] Secondly, there is the issue of universality in adapting to multiple vehicle models. In existing technologies, towing systems typically adopt a vehicle-specific integrated design. Current solutions do not break down the towing system into independently replaceable functional modules, but rather integrate all functions into an inseparable overall structure, making it impossible to adapt to different vehicle models through partial adjustments.

[0021] Firstly, reference Figures 1 to 8 This application provides a corrosion-resistant RV towing device applicable to multiple vehicle models, comprising: Crossbeam 1; Two mounting components 2 are mounted on the crossbeam 1, and there is a design distance between the two mounting components 2 for fixed connection with the vehicle body 5 of the target vehicle width; The connecting frame 3 is fixedly mounted on the crossbeam 1 and has a square opening 31; The connecting pipe 4 is used to connect to the trailer hook 6; the connecting pipe 4 passes through the square opening 31, and the connecting part 41 is located inside the square opening 31; the connecting part 41 abuts against the top corner of the square opening 31, and there is a reserved gap 7 between the outer wall and the inner wall of the square opening 31 to form a channel for the flow of the electrophoretic fluid.

[0022] By designing this structure, the existing technology, due to manufacturing process errors, creates a tiny gap between the square opening 31 and the connecting pipe 4 that is highly concealed and difficult to detect with the naked eye. Furthermore, the industry generally believes that the tighter the fit between the square opening 31 and the connecting pipe 4 and the smaller the gap, the higher the structural strength. Therefore, the long-term neglect of this tiny gap has led to the inability of the electrophoretic liquid to enter, while moisture can penetrate and cause corrosion. This application breaks with this conventional thinking by designing the connecting part 41 of the connecting pipe 4 to only contact the four apex corners of the square opening 31. This creates a pre-set, visible gap between the outer wall of the connecting pipe 4 and the inner wall of the square opening 31. The apex corner contact ensures the positioning and force transmission of the connecting pipe 4 within the square opening 31. Simultaneously, the pre-set gap 7 allows the electrophoretic liquid to flow smoothly and cover all surfaces, thus solving the corrosion problem that has been long overlooked due to the concealed gap. Secondly, there is a design distance between the two mounting components 2, which can be preset according to the width of the target vehicle model, thereby adapting to different vehicle widths. The generalization of the main structure is achieved by adjusting the spacing of the mounting components 2, which reduces the research and development costs and manufacturing costs.

[0023] Furthermore, in one embodiment, the radial cross-section of the connecting portion 41 is a quadrilateral structure, wherein the four vertices respectively abut against the vertices of the square opening 31; The top and bottom edges of the quadrilateral structure are straight, and both the top and bottom edges fit into the corresponding inner wall of the square opening 31; the two sides of the quadrilateral structure are curved, and the curved lines have a preset distance from the inner wall of the square opening 31; a reserved gap 7 is provided between the curved side of the connecting part 41 and the corresponding inner wall of the square opening 31.

[0024] In this embodiment, by designing the top and bottom edges of the connecting part 41 as straight edges and fitting them to the inner wall of the square opening 31, the connecting pipe 4 is accurately positioned and stably supported in the vertical direction, avoiding structural loosening caused by the reserved gap 7. At the same time, the two sides are designed as arcs and maintain a preset distance from the inner wall of the square opening 31, thereby forming a large and controllable reserved gap 7 on both sides. This reserved gap 7 not only provides a smooth flow channel for the electrophoretic liquid, ensuring that the electrophoretic liquid can smoothly enter and cover all surfaces, but the arc structure is also more conducive to the uniform flow of the electrophoretic liquid along the curved surface, avoiding dead corner residue. Thus, without sacrificing structural stability, the problem of poor electrophoresis and corrosion caused by the concealment of small gaps is solved.

[0025] Furthermore, in one embodiment, the preset distance between the arc and the inner wall of the square opening 31 gradually increases from the bottom along a first direction and from the top along a second direction, reaching a preset maximum distance in the middle of the arc; wherein, the direction from the bottom edge perpendicularly to the top edge is the first direction, and the direction from the top edge perpendicularly to the bottom edge is the second direction.

[0026] In this embodiment, by designing the preset distance between the arc and the inner wall of the square opening 31 as a gradually increasing structure from the bottom and top to the middle, a wedge-shaped reserved gap with a wider middle and narrower ends is formed. This design, on the one hand, maintains a smaller gap at the joint of the top and bottom edges, avoiding unnecessary vertical swaying of the connecting pipe 4 due to excessively large gaps, thus ensuring structural stability; on the other hand, it forms the largest gap width in the middle of the arc, providing ample inlet and channel for the flow of the electrophoretic solution, allowing it to smoothly enter from both sides and naturally diffuse along the arc surface to the entire gap area, avoiding the problems of slow flow rate or liquid stagnation in the middle that may occur due to uniform gaps. Furthermore, the gradually changing gap structure can promote the circulation and renewal of the electrophoretic solution within the gap during electrophoresis, thereby further improving coating uniformity and anti-corrosion effect.

[0027] Furthermore, in one embodiment, the inner wall of the square opening 31 corresponding to the arc is provided with a recess; A pre-reserved gap 7 is provided between the concave part and the side where the arc of the connecting part 41 is located.

[0028] In this embodiment, by adding a recess on the inner wall of the square opening 31, the reserved gap 7 is formed by the arc surface of the connecting part 41 of the connecting pipe 4 and the recess on the inner wall of the square opening 31, further expanding the flow space of the electrophoretic liquid. The presence of the recess increases the volume of the reserved gap 7, allowing the electrophoretic liquid to flow more smoothly and fill the entire gap area, eliminating the electrophoretic blind zone caused by the narrow gap. Secondly, the shape and depth of the recess can be independently designed according to the requirements of the electrophoresis process without changing the arc structure of the connecting part 41 of the connecting pipe 4, thereby decoupling the standardized production of the connecting pipe 4 from the flexible adjustment of the gap size, reducing manufacturing difficulty and cost. The recess forms a local depression on the inner wall of the square opening 31. Even if there is a slight deviation between the arc surface of the connecting part 41 of the connecting pipe 4 and the inner wall of the square opening 31 during assembly, the recess can still ensure that sufficient electrophoretic liquid channels are not blocked, improving the assembly error tolerance.

[0029] Furthermore, in one embodiment, the mounting component 2 includes a connecting plate 21; The connecting plate 21 is fixed to the protected cross beam 1 by providing a first opening adapted to the radial section of the cross beam 1; the connecting plate 21 is provided with a plurality of first bolt holes 211 and is detachably connected to the vehicle body 5 by bolts 8.

[0030] In this embodiment, by setting a first opening adapted to the radial section of the crossbeam 1, the connecting plate 21 can be fitted and fixed to the end of the crossbeam 1, ensuring the positioning accuracy and connection reliability between the mounting component 2 and the crossbeam 1. At the same time, the connecting plate 21 is detachably connected to the vehicle body 5 through multiple first bolt holes 211. On the one hand, the detachable connection allows the mounting component 2 to pre-set the installation spacing according to the width of different vehicle models. Only the installation position of the bolts 8 of the connecting plate 21 needs to be replaced or adjusted to adapt to different vehicle bodies, realizing the cross-vehicle universality of the crossbeam 1 and the interface component. On the other hand, this detachable connection method facilitates later maintenance or replacement. Individual components can be disassembled without cutting or welding, reducing after-sales maintenance costs and the threshold for use.

[0031] Furthermore, in one embodiment, the mounting assembly 2 further includes a reinforcing plate 22 and an L-shaped plate 23; One side of the L-shaped plate 23 is fixed to the protected crossbeam 1 through a second opening adapted to the radial section of the crossbeam 1, and the other side is attached to the top of the crossbeam 1. A second bolt hole is provided on the top side of the crossbeam 1, and it is detachably connected to the vehicle body 5 by bolts 8. One side of the reinforcing plate 22 is attached to the side of the crossbeam 1, and both sides are fixedly connected to the L-shaped plate 23 and the connecting plate 21 respectively.

[0032] In this embodiment, by adding an L-shaped plate 23 and a reinforcing plate 22, a three-dimensional support structure is constructed in which the connecting plate 21, the L-shaped plate 23, and the reinforcing plate 22 work together. One side of the L-shaped plate 23 is fitted onto the end of the crossbeam 1, and the other side is attached to the top of the crossbeam 1 and connected to the vehicle body 5 by bolts 8, realizing dual positioning and fixation of the crossbeam 1 in both the vertical and horizontal directions. The reinforcing plate 22 is attached to the side of the crossbeam 1 and simultaneously connects the L-shaped plate 23 and the connecting plate 21, forming a stable force transmission path in the frame shape, which improves the load-bearing capacity and torsional stiffness of the mounting assembly 2 in both the lateral and longitudinal directions. Compared with the solution that relies solely on a single connecting plate 21 for fixation, this structure can more effectively disperse the complex stress generated during towing and avoid localized concentrated deformation or fatigue failure. Meanwhile, both the L-shaped plate 23 and the connecting plate 21 are detachably connected to the body 5 by bolts 8, which ensures the sturdiness of the installation and retains the flexibility of modular disassembly and assembly. Different models can be adapted simply by adjusting the spacing between the L-shaped plate 23 and the connecting plate 21 or by replacing the corresponding specifications of the plate, without having to redesign the main structure of the crossbeam 1, thus strengthening the advantage of multi-model universality.

[0033] Furthermore, in one embodiment, the bottom and top of the crossbeam 1 are respectively provided with a bottom opening and a top opening, and the L-shaped plate 23 is provided with a third opening corresponding to the top opening on one side of the top of the crossbeam 1. The crossbeam 1 is detachably connected to the vehicle body 5 by bolts 8 passing through the bottom opening, the top opening and the third opening in sequence.

[0034] In this embodiment, by opening at the bottom and top of the crossbeam 1 and a third opening at the corresponding position of the L-shaped plate 23, a through-type fixing method is achieved, where the bolt 8 passes through the bottom, top, and L-shaped plate 23 of the crossbeam 1 sequentially and is directly connected to the vehicle body 5. The bolt 8 penetrates the three-layer structure vertically in one go, forming a continuous force transmission path from the bottom of the crossbeam 1 to the top of the L-shaped plate 23. This directly transmits the vertical load and torsional moment generated during towing to the longitudinal beam of the vehicle body 5, avoiding stress concentration when the load is transmitted through multiple layers of welding or indirect connections. The through-type bolt connection locks the crossbeam 1, L-shaped plate 23, and vehicle body 5 into one unit, suppressing relative displacement and vibration between components and improving the stability of the overall structure. Compared with the split multi-point fixing scheme, the single bolt 8 through-fixing method simplifies the installation process, reduces the accumulation of assembly errors, and facilitates later disassembly and maintenance.

[0035] Furthermore, in one embodiment, the connecting pipe 4 is provided with a locking pin hole 42; The trailer hook 6 is inserted into the connecting tube 4, and a straight rod 43 passes through the locking pin hole 42 and the corresponding hole on the trailer hook 6 to achieve detachable fixation.

[0036] In this embodiment, the trailer hook 6 and the connecting pipe 4 are detachably fixed through the cooperation of the locking pin hole 42 and the straight rod 43, providing users with a convenient loading and unloading experience. When towing is not required, the straight rod 43 can be easily pulled out to remove the trailer hook, avoiding the trailer hook 6 being exposed, which affects aesthetics or poses a safety hazard. When towing is required, the trailer hook 6 can be inserted and locked with the straight rod 43 for quick use. Compared with solutions that integrate the trailer hook 6 and the connecting pipe 4 or use complex locking mechanisms, this design is simple in structure, intuitive in operation, and highly reliable. Furthermore, the straight rod 43 is a standard part that is easy to purchase and replace, reducing manufacturing and maintenance costs.

[0037] Furthermore, it's important to understand that the diameter of the locking pin hole 42 is set according to the specifications of the selected straight rod 43, while the material and diameter of the straight rod 43 are selected and designed based on the overall rated load-bearing capacity of the RV towing device. Specifically, the shear strength of the straight rod 43 is precisely calculated to ensure that its shear fracture threshold is lower than the ultimate load-bearing capacity of the crossbeam 1 and the connected frame structure. When the towing load unexpectedly exceeds the rated range, the straight rod 43 will shear fracture before the crossbeam 1 and the frame, thereby separating the tow hook 6 from the connecting pipe 4, thus providing overload protection. This design is equivalent to setting a controllable weak point in the towing system. By sacrificing a low-cost, easily replaceable straight rod 43, it avoids high-cost repair problems such as crossbeam 1 deformation, frame damage, or even structural failure of the entire vehicle due to overload. Users only need to replace the straight rod 43 to restore normal use, reducing maintenance costs and safety hazards under extreme conditions.

[0038] Furthermore, in one embodiment, the bottom of the connecting pipe 4 is also provided with a limiting bolt 44, which passes through the bottom wall of the connecting pipe 4 in a vertical direction and abuts against the lower surface of the trailer hook 6, so as to apply an upward preload to the trailer hook 6.

[0039] In this embodiment, a vertically upward preload is applied to the trailer hook 6 by a limiting bolt 44 located at the bottom of the connecting pipe 4, eliminating the vertical assembly gap between the trailer hook 6 and the connecting pipe 4. During actual towing operations, if there is no preload constraint when the vehicle starts, brakes, or traverses bumpy roads, the trailer hook 6 will move up and down within the connecting pipe 4, causing abnormal noise and affecting the driving experience. This also leads to repeated impacts and wear at the connection points, accelerating component fatigue failure. The limiting bolt 44 continuously applies preload to press the trailer hook 6 tightly against the inner wall of the connecting pipe 4, ensuring a tight fit and eliminating vertical play. Furthermore, this design does not alter the structure of the trailer hook 6 itself; users only need to tighten the limiting bolt 44 after installing the trailer hook, making operation simple and allowing for individual replacement after wear, resulting in extremely low maintenance costs. In addition, the friction generated by the preload can also suppress lateral swaying of the trailer hook 6 to a certain extent, further improving the stability of towing operations.

[0040] Secondly, this application provides a vehicle that uses the multi-model and corrosion-resistant RV towing device described in the first aspect.

[0041] The beneficial effects of this invention include: A corrosion-resistant RV towing device suitable for multiple vehicle models is provided. This application breaks with conventional thinking by designing the connecting part 41 of the connecting pipe 4 to only abut against the four apex corners of the square opening 31. This creates a pre-set, visible gap between the outer wall of the connecting pipe 4 and the inner wall of the square opening 31. The apex corner abutment ensures the positioning and force transmission of the connecting pipe 4 in the square opening 31. At the same time, the pre-set gap 7 allows the electrophoretic liquid to flow smoothly and cover all surfaces, thus solving the corrosion problem that has been neglected for a long time due to the hidden gap. Secondly, there is a design distance between the two mounting components 2, which can be preset according to the width of the target vehicle model, thereby adapting to different vehicle widths. The generalization of the main structure is achieved by adjusting the spacing of the mounting components 2, which reduces R&D and manufacturing costs.

[0042] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0043] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A corrosion-resistant RV towing device suitable for multiple vehicle models, characterized in that, It includes: Crossbeam (1); Two mounting components (2) are provided on the crossbeam (1) and there is a design distance between the two mounting components (2) for fixed connection with the vehicle body (5) of the target vehicle width; The connecting frame (3) is fixed on the crossbeam (1) and has a square opening (31). A connecting pipe (4) is used to connect to a trailer hook (6); the connecting pipe (4) passes through the square opening (31), and the connecting part (41) is located inside the square opening (31); the connecting part (41) abuts against the top corner of the square opening (31), and there is a reserved gap (7) between the outer wall and the inner wall of the square opening (31) to form a channel for the flow of electrophoretic fluid.

2. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 1, characterized in that: The radial cross-section of the connecting part (41) is a quadrilateral structure, wherein the four vertices respectively abut against the vertices of the square opening (31); The top and bottom edges of the quadrilateral structure are straight, and both the top and bottom edges are in contact with the corresponding inner wall of the square opening (31); the two sides of the quadrilateral structure are arcs, and the arcs are at a predetermined distance from the inner wall of the square opening (31); the reserved gap (7) is between the side of the connecting part (41) where the arc is located and the corresponding inner wall of the square opening (31).

3. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 2, characterized in that: The preset distance between the arc and the inner wall of the square opening (31) gradually increases from the bottom along the first direction and from the top along the second direction, and reaches the preset maximum distance in the middle of the arc; wherein, the direction from the bottom edge perpendicular to the top edge is the first direction, and the direction from the top edge perpendicular to the bottom edge is the second direction.

4. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 3, characterized in that: The inner wall of the square opening (31) corresponding to the arc is provided with a recess; The reserved gap (7) is located between the recess and the side where the arc of the connecting part (41) is located.

5. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 1, characterized in that: The mounting component (2) includes a connecting plate (21); The connecting plate (21) is fixed to the protected crossbeam (1) by setting a first opening adapted to the radial section of the crossbeam (1); the connecting plate (21) is provided with a plurality of first bolt holes (211) and is detachably connected to the vehicle body (5) by bolts (8).

6. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 5, characterized in that: The mounting assembly (2) also includes a reinforcing plate (22) and an L-shaped plate (23); One side of the L-shaped plate (23) is fixed to the protected crossbeam (1) by setting a second opening adapted to the radial section of the crossbeam (1), and the other side is attached to the top of the crossbeam (1). A second bolt hole is provided on one side of the top of the crossbeam (1), and it is detachably connected to the vehicle body (5) by bolts (8). One side of the reinforcing plate (22) is attached to the side of the crossbeam (1), and both sides are fixedly connected to the L-shaped plate (23) and the connecting plate (21) respectively.

7. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 6, characterized in that: The bottom and top of the crossbeam (1) are respectively provided with a bottom opening and a top opening, and the L-shaped plate (23) is provided with a third opening on the top side of the crossbeam (1) corresponding to the top opening; The crossbeam (1) is detachably connected to the vehicle body (5) by bolts (8) passing sequentially through the bottom opening, the top opening and the third opening.

8. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 1, characterized in that: The connecting pipe (4) is provided with a locking pin hole (42). The trailer hook (6) is inserted into the connecting tube (4) and a straight rod (43) passes through the locking pin hole (42) and the corresponding hole on the trailer hook (6) to achieve detachable fixation.

9. The RV towing device applicable to multiple vehicle models and corrosion resistant as described in claim 8, characterized in that: The bottom of the connecting pipe (4) is also provided with a limiting bolt (44), which passes through the bottom wall of the connecting pipe (4) in the vertical direction and abuts against the lower surface of the trailer hook (6) to apply an upward preload to the trailer hook (6).

10. A vehicle, characterized in that, The vehicle uses a multi-model, corrosion-resistant RV towing device as described in any one of claims 1-9.

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