Middle-mounted tow hook installation reinforcing structure and vehicle

Abstract

The invention discloses a centrally-mounted tow hook installation reinforcing structure and a vehicle, the centrally-mounted tow hook installation reinforcing structure comprises a cross beam and a rear longitudinal beam rear body, the two ends of the cross beam are provided with end reinforcing assemblies, the rear longitudinal beam rear body is provided with a rear reinforcing assembly, and the bottom of the rear longitudinal beam rear body is provided with a bottom reinforcing assembly. The rigidity and durability of the ends of the cross beam are improved through the end reinforcing assemblies, the rear reinforcing assembly serves as a reinforcing framework, the structural weak points of the connecting positions are made up through the bottom reinforcing assembly, the multi-stage bearing framework design that the end reinforcing assemblies, the rear reinforcing assembly and the bottom reinforcing assembly are matched is adopted, and through different path structures, the structural strength of the cross beam is improved. Component force is transmitted to the vehicle body main body framework in parallel, the stress concentration problem can be avoided, and the reliability of the whole structure is improved. A material and structure collaborative optimization method is adopted, a key bearing area is made of an ultrahigh-strength material, a non-key area is made of a common material, and the problem of contradiction between strength and light weight is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile design and manufacturing, and particularly relates to a middle trailer hook mounting reinforcing structure and a vehicle. BACKGROUND

[0002] With the gradual popularity of off-road vehicles, consumers of off-road vehicles have increasingly high requirements for the use functions of off-road vehicles. Off-road vehicles are required to not only carry people normally but also have certain towing capacity, so as to tow a recreational vehicle or other vehicles without power source to travel and meet the off-road camping needs of consumers. The main function of the middle trailer hook device is to serve as a connecting device to play a role of intermediate connection between the off-road vehicle and the recreational vehicle or other vehicles without power source, so that the off-road vehicle can serve as a traction power source to tow the recreational vehicle or other vehicles without power source to travel.

[0003] For a load-bearing body, the middle trailer hook device is usually mounted at the end of the rear longitudinal beam of the body, that is, the mounting position of the traditional rear bumper assembly. However, the structure at the rear longitudinal beam of the body needs to have sufficient strength to ensure the stable and reliable mounting of the middle trailer hook, so as to avoid the occurrence of structure fracture during driving, resulting in the disconnection between the rear towing device and the off-road vehicle and causing an accident.

[0004] The existing mounting method of the middle trailer hook of the load-bearing body mainly realizes the mounting of the trailer hook by replacing the partial mounting point of the rear bumper assembly. This mounting method has a high requirement for the local strength of the mounting point, mainly relies on the surrounding components (such as the rear anti-collision beam connecting plate and the longitudinal beam end) for bearing, forms a single-point concentrated force mode, and generally requires a relatively thick material thickness of the associated parts of the body to meet the strength requirement of the partial mounting point. The main disadvantages of this mounting method are: (1) Single load transmission path: the load is mainly transmitted through the rear mounting point, and there is obvious stress concentration in the structure, which often occurs at the joint. Cracking problems often occur during road test.

[0005] (2) Redundant structure design: in order to meet the strength requirement, the traditional scheme often adopts the strategy of increasing the thickness of the global structural parts: the rear wall plate and the longitudinal beam body segment in the non-direct force area are also forced to increase the weight synchronously, causing the redundant design of the structure of the body.

[0006] (3) Poor fatigue life of local structure: under the dynamic road test load of the test field, the stress amplitude of the traditional structure fluctuates in a large range, which easily causes cracking and other durability problems at the welded joint.

[0007] Therefore, it is necessary to provide a reasonable design of a middle trailer hook mounting reinforcing structure to ensure the safe and reliable function of an off-road vehicle in a user's use scenario, avoid the cracking or severe deformation of the middle trailer hook device near the mounting point of the rear longitudinal beam during the use of the vehicle, and even avoid the damage to the vehicle, thereby affecting the vehicle safety and user reputation. SUMMARY

[0008] In view of the above technical problems, the present application provides a middle trailer hook mounting reinforcing structure and a vehicle, which effectively improve the above problems.

[0009] To achieve the above-mentioned purposes, the present application provides the following technical solutions: Firstly, a middle trailer hook mounting reinforcing structure is provided, which comprises a cross beam and a rear longitudinal beam rear body, two groups of rear longitudinal beam rear bodies are respectively connected to the end portion side walls of the two ends of the cross beam, a rear mounting plate is connected to the end portion of the cross beam on the rear longitudinal beam rear body, and a trailer hook mounting plate is mounted on one side of the rear mounting plate; End reinforcing assemblies are mounted on the two ends of the cross beam, and the end reinforcing assemblies comprise a trailer hook reinforcing beam II, a trailer hook mounting end plate and a trailer hook mounting bottom plate; A rear reinforcing assembly is mounted on the rear longitudinal beam rear body, and the rear reinforcing assembly comprises a trailer hook reinforcing beam I, a bolt sleeve and a connecting screw rod; The end reinforcing assembly and the rear reinforcing assembly are fixedly connected through the rear mounting plate and the trailer hook mounting plate, and a bottom reinforcing assembly is arranged at the bottom of the rear longitudinal beam rear body.

[0010] Preferably, the trailer hook reinforcing beam II is mounted on the two end portion side walls of the cross beam, the trailer hook mounting end plate is connected to the end head of the two ends of the cross beam and is fixedly connected with the trailer hook reinforcing beam II, the trailer hook mounting bottom plate is connected to the bottom of the cross beam and the trailer hook reinforcing beam II, and one end of the trailer hook mounting bottom plate extends and is connected to one side of the trailer hook mounting end plate.

[0011] Preferably, the rear longitudinal beam rear body is arranged in a U-shaped structure, the two side edges of the top of the U-shaped structure are arranged in a flange structure, the trailer hook reinforcing beam I is a square beam and is located at the inner bottom wall of the rear longitudinal beam rear body, two groups of bolt sleeves are arranged to penetrate the beam body of the trailer hook reinforcing beam I, and the connecting screw rod is located in the interior of the bolt sleeve and penetrates the two side outer walls of the rear longitudinal beam rear body at both ends.

[0012] Preferably, one end of the trailer hook reinforcing beam I is provided with a notch, one end of the notch penetrates the interior of the rear mounting plate and the trailer hook mounting plate, and extends and is connected to the top of the trailer hook reinforcing beam II and the cross beam.

[0013] Preferably, the trailer hook reinforcing beam II is arranged as a square beam, and the end of the other end is connected with the trailer hook mounting plate, and the trailer hook mounting end plate and the one end of the trailer hook mounting bottom plate are fixedly connected with the trailer hook mounting plate.

[0014] Preferably, the bottom reinforcing assembly comprises a bottom reinforcing end plate, a bottom reinforcing beam I, a bottom reinforcing beam II, a bottom reinforcing beam III, a bottom reinforcing beam IV and a bottom reinforcing bottom plate, wherein the bottom reinforcing end plate is fixedly connected with the trailer hook mounting plate through the connecting bolt I, and the bottom reinforcing bottom plate is fixedly connected with the bottom of the rear longitudinal beam rear body through the connecting bolt II.

[0015] Preferably, the bottom reinforcing beam I, the bottom reinforcing beam II, the bottom reinforcing beam III and the bottom reinforcing beam IV are sequentially connected on the panel side edge of the bottom reinforcing bottom plate, wherein the side edge of the bottom reinforcing beam I is connected with the short side of one side of the bottom reinforcing bottom plate, and the side edge of the bottom reinforcing beam IV is connected with the long side of the other side of the bottom reinforcing bottom plate.

[0016] Preferably, the bottom side edge of the bottom reinforcing end plate is connected with the panel side edge of the bottom reinforcing bottom plate, and the other side edges of the bottom reinforcing beam I, the bottom reinforcing beam II, the bottom reinforcing beam III and the bottom reinforcing beam IV are connected with the panel of one side of the bottom reinforcing end plate.

[0017] Preferably, the middle part of the cross beam is provided with a trailer hook connecting structure, and the trailer hook connecting structure is used for mounting the middle trailer hook.

[0018] Secondly, a vehicle comprising the above-mentioned middle trailer hook mounting reinforcing structure is provided.

[0019] Compared with the prior art, the present application has the following beneficial effects: 1. The end reinforcing assembly covers all stress directions of the end of the cross beam, improves the rigidity and durability of the end of the cross beam, the rear reinforcing assembly is used as a reinforcing framework of the rear part of the rear longitudinal beam, the towing force can be uniformly transmitted to the two side walls of the rear longitudinal beam to avoid stress concentration, the three-dimensional reinforcing structure of the bottom reinforcing assembly compensates for the weak structure of the connection between the cross beam and the rear part of the rear longitudinal beam, enhances the rigidity and bending resistance, prevents local deformation or cracking under the action of towing or impact load, and the multi-level bearing architecture design of the end reinforcing assembly, the rear reinforcing assembly and the bottom reinforcing assembly cooperates, and through different path structures, the component forces are transmitted to the main body framework of the vehicle in parallel, so that the stress concentration problem can be avoided, and the reliability of the overall structure is improved.

[0020] 2. The present application adopts the method of material and structure optimization, in the design, the key bearing area adopts super high strength material, the non key area adopts ordinary material, through the ingenious structure design, realizes the structure rigidity and strength, solves the contradiction problem between strength and light weight.

[0021] Additional features and advantages of the present application will be set forth in the description that follows, and in part will be apparent from the description, or can be learned by practice of the present application. The objectives and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0023] Figure 1 is the overall structure schematic diagram of the center trailer hook mounting reinforcing structure provided by the present application; Figure 2 is the structure installation schematic diagram of the rear reinforcing assembly provided by the present application; Figure 3 is the structure installation schematic diagram of the bottom reinforcing assembly provided by the present application; Figure 4 is the structure installation schematic diagram of the end reinforcing assembly provided by the present application Figure 1 ; Figure 5 is the structure installation schematic diagram of the end reinforcing assembly provided by the present application Figure 2 ; Figure 6 is the overall structure schematic diagram of the bottom reinforcing assembly provided by the present application; Figure 7 is the structure schematic diagram of the trailer hook reinforcing beam I provided by the present application.

[0024] Explanation of reference signs: 1, cross beam; 2, trailer hook mounting plate; 3, rear longitudinal beam rear body; 4, rear mounting plate; 5, trailer hook reinforcing beam I; 6, trailer hook reinforcing beam II; 7, bolt sleeve; 8, connecting screw; 9, bottom reinforcing assembly; 901, bottom reinforcing end plate; 902, bottom reinforcing beam I; 903, bottom reinforcing beam II; 904, bottom reinforcing beam III; 905, bottom reinforcing beam IV; 906, bottom reinforcing bottom plate; 10, trailer hook mounting end plate; 11, trailer hook mounting bottom plate; 12, connecting bolt I; 13, connecting bolt II; 14, trailer hook connecting structure. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The same reference numerals in the accompanying drawings denote the same or similar elements, components, or parts, and therefore, repeated descriptions of the same or similar elements, components, or parts may be omitted below. It should also be understood that although terms such as first, second, third, etc., indicating numbers may be used herein to describe various devices, elements, components, or parts, these devices, elements, components, or parts should not be limited by these terms. That is, these terms are only used to distinguish one from another. For example, a first device may also be referred to as a second device, without departing from the essential technical solution of the invention. Furthermore, the terms "and / or" and "and / or" refer to all combinations including any one or more of the listed items.

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] This invention provides a reinforced structure for mounting a centrally located trailer hitch.

[0029] In this embodiment, as Figure 1 The diagram shows the overall structure of the centrally mounted trailer hitch reinforcement structure, which includes a crossbeam 1 and a rear longitudinal beam rear body 3. A trailer hitch connection structure 14 for mounting a trailer hitch is installed in the middle of the crossbeam 1. The two sets of rear longitudinal beam rear bodies 3 are respectively connected to the end sidewalls at both ends of the crossbeam 1. A rear mounting plate 4 is connected to the end of the rear longitudinal beam rear body 3 near the crossbeam 1. A trailer hitch mounting plate 2 is installed on one side of the rear mounting plate 4. End reinforcement components are installed at both ends of the crossbeam 1. A rear reinforcement component is installed on the rear longitudinal beam rear body 3. The end reinforcement component and the rear reinforcement component are fixedly connected to the trailer hitch mounting plate 2 through the rear mounting plate 4. Specifically, the trailer hook connection structure 14 is provided with screw holes, and the trailer hook can be installed by bolt connection. The rear body 3 of the rear longitudinal beam with rear reinforcement components and the crossbeam 1 with end reinforcement components are fixed together by the cooperation of the trailer hook mounting plate 2 and the rear mounting plate 4. The crossbeam 1, as a transverse load-bearing skeleton, is set as a square beam. In order to prevent the ends of the crossbeam 1 from deforming or tearing under dragging force, end reinforcement components are set at both ends to enhance the rigidity and strength of the crossbeam 1 and improve its overall load-bearing capacity. The rear body 3 of the rear longitudinal beam, as a longitudinal load-bearing skeleton, is symmetrically arranged on the end sidewalls at both ends of the crossbeam 1. The rear reinforcement components are used to enhance the bending and torsional resistance of the rear body 3 of the rear longitudinal beam under dragging force.

[0030] As shown in Figure 4 , the structure installation of the end reinforcing assembly Figure 1 , the end reinforcing assembly comprises a trailer hook reinforcing beam II 6 and a trailer hook mounting end plate 10, wherein the trailer hook reinforcing beam II 6 is mounted on the end side wall of the cross beam 1, the trailer hook mounting end plate 10 is connected to the end head of the cross beam 1, and is fixedly connected with the trailer hook reinforcing beam II 6; Specifically, the trailer hook reinforcing beam II 6 is set as a square beam as a reinforcing rib of the end of the cross beam 1, which more evenly disperses the pulling force of the trailer hook to the rear longitudinal beam rear body 3 through the end of the cross beam 1, avoids stress concentration, and the trailer hook mounting end plate 10 is used for reinforcing the end of the cross beam 1; As shown in Figure 5 , the structure installation of the end reinforcing assembly Figure 2 , the end reinforcing assembly further comprises a trailer hook mounting bottom plate 11, the trailer hook mounting bottom plate 11 is connected to the bottom of the cross beam 1 and the trailer hook reinforcing beam II 6, and one end of the trailer hook mounting bottom plate 11 extends and is connected to one side of the trailer hook mounting end plate 10, the other end of the trailer hook reinforcing beam II 6 is connected to the trailer hook mounting plate 2, and one end of the trailer hook mounting end plate 10 and the trailer hook mounting bottom plate 11 are fixedly connected with the trailer hook mounting plate 2; Specifically, the trailer hook mounting bottom plate 11 is used for reinforcing the lower part of the end of the cross beam 1, the trailer hook reinforcing beam II 6, the trailer hook mounting end plate 10 and the trailer hook mounting bottom plate 11 in the end reinforcing assembly jointly constitute a three-dimensional reinforcing node, the two ends of the cross beam 1 are reinforced, the stress of the trailer hook is reasonably dispersed, the rigidity and durability of the end of the cross beam 1 are significantly improved, and the reliability of the overall structure is improved.

[0031] As shown in Figure 2 , the structure installation of the rear reinforcing assembly , the rear reinforcing assembly comprises a trailer hook reinforcing beam I 5, a bolt sleeve 7 and a connecting screw 8, wherein the trailer hook reinforcing beam I 5 is located on the inner side bottom wall of the rear longitudinal beam rear body 3, two groups of bolt sleeves 7 are installed through the beam body of the trailer hook reinforcing beam I 5, and the connecting screw 8 is located in the interior of the bolt sleeve 7 and is installed through the two side outer walls of the rear longitudinal beam rear body 3 at both ends; Specifically, the rear longitudinal beam rear body 3 is set as a U-shaped structure, the two side edges of the top of the U-shaped structure are set as a flange structure, the trailer hook reinforcing beam I 5 is fastened to the inner side bottom wall of the rear longitudinal beam rear body 3 by the cooperation of the bolt sleeve 7 and the connecting screw 8, and a whole force structure is formed, the trailer hook reinforcing beam I 5 is an embedded reinforcing framework of the rear longitudinal beam rear body 3, bears the pulling force transmitted by the trailer hook, prevents deformation or cracking of the bottom of the rear longitudinal beam rear body 3, and the rear reinforcing assembly reinforces the key stress area of the rear longitudinal beam rear body 3, ensures that the load of the trailer hook is evenly dispersed to the main body structure of the vehicle body, and takes into account the towing strength and the safety of the whole vehicle; As shown in Figure 7As shown, the trailer hook reinforcing beam I5 is a square beam with a notch at one end. The notch extends through the interior of the rear mounting plate 4 and the trailer hook mounting plate 2, and extends to connect the trailer hook reinforcing beam II6 and the top of the crossbeam 1. Specifically, the notch structure of the trailer hook reinforcing beam I5 serves as an insert interface, ensuring that it can accurately penetrate the rear mounting plate 4 and the trailer hook mounting plate 2, avoiding assembly misalignment. At the same time, the notch extends to the top of the trailer hook reinforcing beam II6 and the crossbeam 1, forming a rigid connection across the components, connecting the end reinforcing components with the rear reinforcing components, reducing stress concentration in the intermediate structure, and further improving the stability of the overall trailer hook installation reinforcing structure under drag force.

[0032] like Figure 3 The diagram shows the structural installation of the bottom reinforcement component 9. The bottom reinforcement component 9 is located at the bottom of the rear body 3 of the rear longitudinal beam. The bottom reinforcement component 9 includes a bottom reinforcement end plate 901 and a bottom reinforcement base plate 906. The bottom reinforcement end plate 901 is fixed to the trailer hook mounting plate 2 by connecting bolt I12, and the bottom reinforcement base plate 906 is fixed to the bottom of the rear body 3 of the rear longitudinal beam by connecting bolt II13. Specifically, the bottom reinforcing end plate 901 is fixedly connected to the trailer hook mounting plate 2, and the bottom reinforcing base plate 906 is fixedly connected to the bottom of the rear longitudinal beam body 3. By setting the bottom reinforcing component 9, the structural weak point at the connection between the crossbeam 1 and the rear longitudinal beam body 3 is compensated, its rigidity and bending resistance are enhanced, and local deformation or cracking is prevented under dragging or impact loads.

[0033] like Figure 6 As shown, the bottom reinforcing assembly 9 also includes bottom reinforcing beam I 902, bottom reinforcing beam II 903, bottom reinforcing beam III 904 and bottom reinforcing beam IV 905. Bottom reinforcing beam I 902, bottom reinforcing beam II 903, bottom reinforcing beam III 904 and bottom reinforcing beam IV 905 are connected sequentially on the side panel of the bottom reinforcing base plate 906. The side of bottom reinforcing beam I 902 is connected to one short side of the bottom reinforcing base plate 906, and the side of bottom reinforcing beam IV 905 is connected to the other long side of the bottom reinforcing base plate 906. Specifically, the bottom reinforcing end plate 901 and the bottom reinforcing base plate 906 together provide mounting surfaces for the bottom reinforcing beams I 902, II 903, III 904, and IV 905. Through the multi-reinforcing beam attachment design, the bottom reinforcing components 9 form a three-dimensional reinforcing frame. By reinforcing the bottom connection between the crossbeam 1 and the rear body 3 of the rear longitudinal beam, the dragging stability, impact resistance, and structural durability are improved.

[0034] Further, the bottom side of the bottom reinforcing end plate 901 is connected with the panel side of the bottom reinforcing bottom plate 906, and the other side of the bottom reinforcing beam I 902, the bottom reinforcing beam II 903, the bottom reinforcing beam III 904 and the bottom reinforcing beam IV 905 is connected with the side panel of the bottom reinforcing end plate 901. Specifically, the bottom reinforcing beam I 902 is arranged along the short side of the bottom reinforcing bottom plate 906, the bottom reinforcing beam IV 905 is arranged along the long side of the bottom reinforcing bottom plate 906, so as to prevent the edge of the bottom reinforcing bottom plate 906 from curling when the bottom reinforcing bottom plate 906 is stressed, and the bottom reinforcing beam II 903 and the bottom reinforcing beam III 904 are arranged at intervals, so as to improve the bending stiffness of the bottom reinforcing bottom plate 906.

[0035] In the embodiment, the rear reinforcing assembly and the bottom reinforcing assembly 9 are fixed on the rear body 3 of the rear longitudinal beam of the vehicle body by means of bolt and screw connection, the components in the end reinforcing assembly are connected by welding and connected to the cross beam 1 by welding, the notch end of the trailer hook reinforcing beam I 5 is connected to the trailer hook reinforcing beam II 6 and the cross beam 1 by welding, and the components in the bottom reinforcing assembly 9 are connected by welding. Through the above connection mode, the center trailer hook mounting reinforcing structure can be effectively arranged on the rear body of the rear longitudinal beam of the vehicle body, and the strength of the center trailer hook mounting point is increased.

[0036] The application further provides a vehicle comprising the above-mentioned center trailer hook mounting reinforcing structure.

[0037] The center trailer hook mounting reinforcing structure of the embodiment is applied to the rear body of the rear longitudinal beam of the vehicle, wherein the cross beam 1, the trailer hook mounting plate 2, the trailer hook reinforcing beam I 5, the trailer hook reinforcing beam II 6, the bottom reinforcing assembly 9, the trailer hook mounting end plate 10 and the trailer hook mounting bottom plate 11 are made of low-alloy high-strength structural steel, the rear body 3 of the rear longitudinal beam is made of high-strength boron alloy steel, and the rear mounting plate 4 is made of high-strength cold-rolled steel / high-strength dual-phase steel. The cross beam 1 has a cross-sectional size of 50mmx50mm and a thickness of 5mm, the trailer hook reinforcing beam I 5 has a cross-sectional size of 40mmx60mm and a thickness of 5mm, the trailer hook reinforcing beam II 6 has a cross-sectional size of 50mmx100mm and a thickness of 5mm, the trailer hook mounting plate 2 has a thickness of 10mm, the rear body 3 of the rear longitudinal beam and the rear mounting plate 4 have a thickness of 2mm, the trailer hook mounting end plate 10 and the trailer hook mounting bottom plate 11 have a thickness of 5mm, and the components in the bottom reinforcing assembly 9 have a thickness of 10mm.

[0038] For the above material and structure of collaborative optimization, through the strength simulation analysis and road test experiment verification of finite element: under the 18kN traction load, the risk area stress is reduced by 44.8% (from 580MPa to 320MPa), the fatigue life is increased by 400% (from 3000km to 15000km), and the real vehicle 15000km trailer road test has no cracking failure (the traditional scheme cracks about 3000km), which fully proves that the optimized strengthening structure can effectively strengthen the strength of the rear trailer hook mounting point of the rear longitudinal beam, solve the failure hidden danger of the traditional scheme, and has obvious structural innovation and performance advantage.

[0039] Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A reinforced structure for mounting a centrally located trailer hitch, comprising a crossbeam (1) and a rear longitudinal beam rear body (3), wherein the two sets of the rear longitudinal beam rear bodies (3) are respectively connected to the end sidewalls at both ends of the crossbeam (1), characterized in that: The rear longitudinal beam rear body (3) is connected to a rear mounting plate (4) near the end of the cross beam (1), and a trailer hook mounting plate (2) is installed on one side of the rear mounting plate (4). Both ends of the crossbeam (1) are equipped with end reinforcement components, which include trailer hook reinforcement beam II (6), trailer hook mounting end plate (10) and trailer hook mounting base plate (11). The rear longitudinal beam is equipped with a rear reinforcement assembly, which includes a trailer hook reinforcement beam I (5), a bolt sleeve (7), and a connecting screw (8). The end reinforcement assembly and the rear reinforcement assembly are fixedly connected to the trailer hook mounting plate (2) via the rear mounting plate (4), and the bottom of the rear longitudinal beam body (3) is provided with a bottom reinforcement assembly (9).

2. The reinforced installation structure for a centrally located trailer hitch according to claim 1, characterized in that: The trailer hook reinforcing beam II (6) is installed on the side walls of both ends of the crossbeam (1). The trailer hook mounting end plate (10) is connected to the end heads of both ends of the crossbeam (1) and is fixedly connected to the trailer hook reinforcing beam II (6). The trailer hook mounting base plate (11) is connected to the bottom of the crossbeam (1) and the trailer hook reinforcing beam II (6), and one end of it extends and is connected to one side of the trailer hook mounting end plate (10).

3. The reinforced installation structure for a centrally located trailer hitch according to claim 1, characterized in that: The rear body (3) of the rear longitudinal beam is configured as a U-shaped structure, with the top two sides of the U-shape configured as flanged structures. The trailer hook reinforcing beam I (5) is a square beam located on the inner bottom wall of the rear body (3) of the rear longitudinal beam. Two sets of bolt sleeves (7) are installed through the beam body of the trailer hook reinforcing beam I (5). The connecting screw (8) is located inside the bolt sleeve (7), and its two ends are installed through the outer walls of both sides of the rear body (3) of the rear longitudinal beam.

4. The reinforced installation structure for a centrally located trailer hitch according to claim 3, characterized in that: One end of the trailer hook reinforcing beam I (5) is provided with a notch, and one end of the notch passes through the interior of the rear mounting plate (4) and the trailer hook mounting plate (2), and extends to connect the top of the trailer hook reinforcing beam II (6) and the crossbeam (1).

5. The reinforced installation structure for a centrally located trailer hitch according to claim 2, characterized in that: The trailer hook reinforcing beam II (6) is set as a square beam, and its other end is connected to the trailer hook mounting plate (2). The trailer hook mounting end plate (10) and the trailer hook mounting base plate (11) are both fixedly connected to the trailer hook mounting plate (2).

6. The reinforced installation structure for a centrally located trailer hitch according to claim 1, characterized in that: The bottom reinforcement assembly (9) includes a bottom reinforcement end plate (901), a bottom reinforcement beam I (902), a bottom reinforcement beam II (903), a bottom reinforcement beam III (904), a bottom reinforcement beam IV (905), and a bottom reinforcement base plate (906). The bottom reinforcement end plate (901) is fixed to the trailer hook mounting plate (2) by connecting bolt I (12), and the bottom reinforcement base plate (906) is fixed to the bottom of the rear body (3) of the rear longitudinal beam by connecting bolt II (13).

7. The centrally mounted trailer hitch installation reinforcement structure according to claim 6, characterized in that: Bottom reinforcing base plate (906) has bottom reinforcing beam I (902), bottom reinforcing beam II (903), bottom reinforcing beam III (904) and bottom reinforcing beam IV (905) connected sequentially on the side panel of the panel. The side of bottom reinforcing beam I (902) is connected to one short side of bottom reinforcing base plate (906), and the side of bottom reinforcing beam IV (905) is connected to the other long side of bottom reinforcing base plate (906).

8. The centrally mounted trailer hitch installation reinforcement structure according to claim 6, characterized in that: The bottom side of the bottom reinforcing end plate (901) is connected to the panel side of the bottom reinforcing base plate (906), and the other side of the bottom reinforcing beam I (902), bottom reinforcing beam II (903), bottom reinforcing beam III (904) and bottom reinforcing beam IV (905) are all connected to one side panel of the bottom reinforcing end plate (901).

9. The reinforced installation structure for a centrally located trailer hitch according to claim 1, characterized in that: A trailer hook connection structure (14) is installed in the middle of the crossbeam (1), and the trailer hook connection structure (14) is used to install a centrally located trailer hook.

10. A vehicle, characterized in that: Includes the centrally mounted trailer hitch mounting reinforcement structure as described in any one of claims 1-9.

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