Vehicle

Abstract

The utility model discloses a vehicle. The vehicle comprises a rear cross beam; the rear end of the dragging square beam extends out of the rear cross beam and is provided with a reinforcing plate, the reinforcing plate is located on at least one side of the dragging square beam in the up-down direction and connected with the rear side of the rear cross beam, and at least part of the reinforcing plate in the left-right direction tilts towards the side away from the dragging square beam in the up-down direction; and the dragging ball head is fixedly connected with the rear end of the dragging square beam and is suitable for being connected with a tractor. Therefore, the dragging square beam is at least partially embedded into the rear cross beam, the rear end of the dragging square beam extends out of the rear cross beam and is provided with the reinforcing plate, and at least part of the reinforcing plate in the left-right direction tilts towards the side away from the dragging square beam in the up-down direction, so that the welding process defects can be reduced; by means of the technical scheme, connection between the dragging square beam and the rear cross beam can be more stable, the bearing capacity and bending rigidity of the dragging square beam can be improved, the dragging square beam is prevented from being broken or deformed, and the firmness and stability of the structure can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle. Background Art

[0002] With the development of science and technology and the improvement of users' living standards, vehicles have become an indispensable means of transportation for people. Vehicles with towing functions can not only rescue other vehicles when they are stuck or stalled, but can also be used for emergency transfer tasks, such as transferring vehicles in need to a safer location or towing illegal parking vehicles away from the scene.

[0003] In the related art, the connection between the square beam of the vehicle towing device and the rear cross beam of the frame is mainly screwed, and there is a risk of bolts loosening after long-term use. In order to ensure the safety of towing and resist the bending load and tensile load transmitted to the root of the towing square mouth and the rear cross beam by the traction force, a commonly used method is to weld a rectangular metal plate between the rear end face of the cross beam and the square mouth as a structural reinforcement plate, thereby protecting the root of the towing square mouth and improving the local stiffness of the cross beam. However, this will make the structure of the towing device bulky, not only with obvious weight increase, but also with limited thickness of the reinforcement plate, and the effect is poor when resisting large bending loads. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a vehicle with a higher structural strength and a stronger bearing capacity, which can effectively improve the safety of the towing process.

[0005] The vehicle according to the utility model comprises: a rear cross beam; a towing square beam, the towing square beam is extended in the front-rear direction and at least partially embedded in the rear cross beam, the rear end of the towing square beam extends out from the rear cross beam and is provided with a reinforcing plate, the reinforcing plate is located on at least one side of the towing square beam in the up-down direction and is connected to the rear side of the rear cross beam, at least a part of the left-right direction of the reinforcing plate is tilted in the up-down direction toward a side away from the towing square beam; a towing ball head, the towing ball head is connected and fixed to the rear end of the towing square beam so as to be suitable for being connected to a tractor.

[0006] Therefore, by arranging the towing square beam to be at least partially embedded in the rear cross beam, the rear end of the towing square beam is extended from the rear cross beam and a reinforcement plate is provided, and at least a part of the left and right directions of the reinforcement plate is tilted in the up and down direction toward the side away from the towing square beam. This can not only reduce welding process defects, but also make the connection between the towing square beam and the rear cross beam more stable, and can also improve the bearing capacity and bending stiffness of the towing square beam, prevent it from breaking or deformation, and improve the firmness and stability of the structure.

[0007] In some examples of the present invention, the reinforcing plate includes a first plate portion and two second plate portions, the first plate portion is fitted and connected to the towing square beam, and the two second plate portions are arranged on the left and right sides of the first plate portion and are bent and extended relative to the first plate portion in the up and down directions away from the towing square beam.

[0008] In some examples of the present invention, the bending angle of the second plate portion relative to the first plate portion is α, and α satisfies the relationship: α≥30°.

[0009] In some examples of the present invention, there are two reinforcing plates, and the two reinforcing plates are respectively arranged on both sides of the towing square beam in the up and down directions.

[0010] In some examples of the present invention, the two reinforcing plates are respectively an upper reinforcing plate and a lower reinforcing plate, the upper reinforcing plate is arranged on the upper side of the dragging square beam, and the lower reinforcing plate is arranged on the lower side of the dragging square beam, and the thickness of the upper reinforcing plate and the lower reinforcing plate in the up and down direction are equal and are both D, and D satisfies the relationship: D≥5mm;

[0011] The width of the upper reinforcing plate in the front-to-back direction is L1, and the width of the lower reinforcing plate in the front-to-back direction is L2. L1 and L2 satisfy the relationship: 15mm≤L1≤45mm, 15mm≤L2≤45mm.

[0012] In some examples of the present invention, the length of the first plate portion in the left-right direction is equal to the size of the towing square beam in the left-right direction, and the length of the second plate portion of the upper reinforcing plate bent and extended relative to the first plate portion is L3, and L3 satisfies the relationship: L3 ≥ 35 mm;

[0013] The length of the second plate portion of the lower reinforcing plate bent and extended relative to the first plate portion is L4, and L4 satisfies the relationship: L4≥55mm.

[0014] In some examples of the present invention, safety chain connection holes are provided on the two second plate portions of the lower reinforcing plate.

[0015] In some examples of the present invention, the front end of the towing square beam at least partially extends out of the rear cross beam and is welded and fixed to the rear cross beam. The length of the front end of the towing square beam extending out of the rear cross beam is L5, and L5 satisfies the relationship: L5≥15mm.

[0016] In some examples of the utility model, pin shaft mounting holes are provided on the left and right sides of the towing square beam, and through holes are provided on the left and right sides of the towing ball head. The towing ball head at least partially extends into the towing square beam, and the two pin shaft mounting holes and the two through holes correspond one to one and are fixed by pin shaft connection.

[0017] In some examples of the present invention, a tightening installation hole is opened on the upper side of the towing square beam.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a partial schematic diagram of a vehicle according to an embodiment of the utility model;

[0021] Figure 2 is a partial top view of a vehicle according to an embodiment of the utility model;

[0022] Figure 3 is a partial side view of a vehicle according to an embodiment of the utility model;

[0023] Figure 4 is a partial exploded view of a vehicle according to an embodiment of the utility model;

[0024] Figure 5 is a partial schematic diagram of a vehicle according to an embodiment of the utility model;

[0025] Figure 6 is a partial schematic diagram of a vehicle according to an embodiment of the utility model;

[0026] Figure 7 It is a partial schematic diagram of a vehicle according to an embodiment of the utility model.

[0027] Reference numerals:

[0028] 100. Vehicles;

[0029] 10. Rear crossbeam;

[0030] 20, drag square beam; 201, pin shaft mounting hole; 202, top tightening mounting hole;

[0031] 30. reinforcement plate; 301. first plate portion; 302. second plate portion; 303. upper reinforcement plate; 304. lower reinforcement plate; 305. safety chain connection hole;

[0032] 40. Drag ball head; 401. Punch. DETAILED DESCRIPTION

[0033] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0034] Reference below Figure 1-Figure 7 A vehicle 100 according to an embodiment of the present invention is described. The vehicle 100 can be used to tow other vehicles.

[0035] Combination Figure 1-Figure 7 As shown, the vehicle 100 according to the present invention may mainly include: a rear cross beam 10, a towing square beam 20 and a towing ball head 40. The rear cross beam 10 not only bears the weight of the towed vehicle 100, but also transmits traction to the towed vehicle 100. In addition, the rear cross beam 10 helps to disperse and balance the various forces generated by the vehicle 100 on the towed vehicle 100 through its structure and position, thereby improving the stability and safety of the towing system of the vehicle 100.

[0036] The dragging square beam 20 is extended in the front-to-back direction and at least partially embedded in the rear cross beam 10. The rear end of the dragging square beam 20 extends from the rear cross beam 10 and is provided with a reinforcing plate 30. The reinforcing plate 30 is located at least on one side of the dragging square beam 20 in the up-down direction and is connected to the rear side of the rear cross beam 10. At least a portion of the reinforcing plate 30 in the left-right direction is tilted in the up-down direction toward a side away from the dragging square beam 20. Specifically, the dragging square beam 20 is extended in the front-to-back direction and at least partially embedded in the rear cross beam 10. The rear end of the dragging square beam 20 extends from the rear cross beam 10. This can not only shorten the cantilever size of the dragging square mouth, making the connection between the dragging square beam 20 and the rear cross beam 10 more stable, but also improve the rigidity and bearing capacity of the dragging square beam 20, and prevent the dragging square beam 20 from breaking or deforming when the force is small.

[0037] In addition, a reinforcing plate 30 is provided on at least one side of the towing square beam 20 in the up-down direction, and the reinforcing plate 30 is connected to the rear side of the rear cross beam 10, and at least a portion of the reinforcing plate 30 in the left-right direction is tilted in the up-down direction toward a side away from the towing square beam 20, so that the structural strength of the towing square beam 20 can be improved, which can not only improve the bearing capacity of the towing square beam 20 in the up-down direction, but also enable it to bear alternating loads in the up-down direction while bearing lateral loads, thereby better protecting the towing square beam 20 and effectively preventing the towing square beam 20 from deformation or breakage when bearing loads.

[0038] The towing ball head 40 is connected and fixed to the rear end of the towing square beam 20 so as to be suitable for connection with the towing vehicle. The towing ball head 40 is connected and fixed to the rear end of the towing square beam 20 and connected to the towing vehicle to achieve the connection between the towing vehicle and the towed vehicle 100. This can not only effectively transmit the traction force so that the towed vehicle 100 can travel together with the towing vehicle under the traction force of the towing vehicle, but also can evenly and stably transmit the traction forces received in different directions to the towing square beam 20. In addition, the structure of the towing ball head 40 is easy to be fixedly connected to the towing vehicle and is not easy to fall off, so as to prevent the tractor from being separated from the towed vehicle 100.

[0039] Furthermore, the tractor and the towed vehicle 100 are fixedly connected by structures such as the rear cross beam 10, the towing square beam 20 and the towing ball head 40. When the tractor and the towed vehicle 100 travel together, due to the ups and downs of the road surface during the travel of the vehicle 100, the towing ball head 40 can evenly transfer the traction forces of different directions and sizes to the towing square beam 20, and then the towing square beam 20 transfers the traction force to the rear cross beam 10, and then to the towed vehicle 100. When the traction force is transmitted to the towing square beam 20, a large bending moment load will be generated. Due to the ups and downs of the road surface during the travel of the vehicle 100, the direction of the bending moment will also change alternately, sometimes the upper part is compressed and the lower part is pulled, and sometimes the lower part is compressed and the upper part is pulled. At this time, the reinforcing plate 30 provided on the towing square beam 20 can resist the alternating bending moment load, and can enhance the structural strength and rigidity of the towing square beam 20, prevent it from breaking or deforming, and improve the bearing capacity and reliability of the structure.

[0040] Therefore, by arranging the dragging square beam 20 to be at least partially embedded in the rear cross beam 10, the rear end of the dragging square beam 20 is extended from the rear cross beam 10 and a reinforcing plate 30 is provided, and at least a part of the left and right directions of the reinforcing plate 30 is tilted in the up and down direction toward the side away from the dragging square beam 20. This can not only reduce welding process defects, but also make the connection between the dragging square beam 20 and the rear cross beam 10 more stable, and can also improve the bearing capacity and bending stiffness of the dragging square beam 20, prevent it from breaking or deformation, and improve the firmness and stability of the structure.

[0041] In some examples of the present invention, when there is enough space at the rear end of the frame, the rear cross beam 10 can be arranged according to the chassis of the vehicle 100 and made of profiled steel material to avoid the problem of cracking due to welding.

[0042] Combination Figure 1 , Figure 2 and Figure 4As shown, the reinforcing plate 30 includes a first plate portion 301 and two second plate portions 302. The first plate portion 301 is connected to the dragging square beam 20 in a close fit. The two second plate portions 302 are arranged on the left and right sides of the first plate portion 301 and are bent and extended relative to the first plate portion 301 in a vertical direction away from the dragging square beam 20. Specifically, by connecting the first plate portion 301 to the dragging square beam 20 in a close fit, the structural strength and rigidity of the dragging square beam 20 can be enhanced. In addition, the two second plate portions 302 are arranged on the left and right sides of the first plate portion 301 and are bent and extended relative to the first plate portion 301 in a vertical direction away from the dragging square beam 20. This can not only disperse the stress when bearing the load and prevent the structural deformation, but also improve the strength and rigidity of the structure and enhance the bearing capacity of the structure. In addition, the fluid resistance of the vehicle 100 during driving can be reduced, the resonance phenomenon can be suppressed, and the vibration amplitude can be reduced, thereby improving the stability of the structure and extending the service life.

[0043] In some examples of the present invention, the structure of the reinforcing plate 30 is similar to an “airfoil”.

[0044] Combination Figure 1 , Figure 4 and Figure 5 As shown, the bending angle of the second plate portion 302 relative to the first plate portion 301 is α, and α satisfies the relationship: α≥30°. Specifically, the bending angle of the second plate portion 302 relative to the first plate portion 301 is required to be greater than or equal to 30 degrees, so as to avoid the bending angle of the second plate portion 302 relative to the first plate portion 301 being too small, thereby causing structural performance failure, and can facilitate the reinforcing plate 30 to bear the alternating loads in the up and down directions while bearing the lateral load, and can improve the bearing performance of the structure.

[0045] Combination Figure 1 , Figure 3 and Figure 4 As shown, there are two reinforcing plates 30, and the two reinforcing plates 30 are respectively arranged on both sides of the towing square beam 20 in the up-down direction. Specifically, by respectively arranging the two reinforcing plates 30 on both sides of the towing square beam 20 in the up-down direction, not only the strength and bearing capacity of the structure can be increased, but also the stability and reliability of the structure can be increased, and the impact force in the up-down direction can be prevented from causing damage to the structure.

[0046] Combination Figure 1 , Figure 3 and Figure 6As shown, the two reinforcing plates 30 are respectively an upper reinforcing plate 303 and a lower reinforcing plate 304. The upper reinforcing plate 303 is arranged on the upper side of the towing square beam 20, and the lower reinforcing plate 304 is arranged on the lower side of the towing square beam 20. The thicknesses of the upper reinforcing plate 303 and the lower reinforcing plate 304 in the up and down directions are equal and are both D, and D satisfies the relationship: D≥5mm; such an arrangement can not only ensure that the reinforcing plate 30 has sufficient strength, but also can effectively absorb and disperse the load transmitted to the towing square beam 20, can reduce the risk of deformation and damage, and thus can enhance the bearing capacity and stability of the entire structure.

[0047] The width of the upper reinforcing plate 303 in the front-to-back direction is L1, and the width of the lower reinforcing plate 304 in the front-to-back direction is L2. L1 and L2 satisfy the relationship: 15mm≤L1≤45mm, 15mm≤L2≤45mm. This arrangement can ensure that the warped position of the airfoil reinforcing plate 30 has sufficient welding length, and can ensure the strength of the reinforcing plate 30 structure.

[0048] Furthermore, the interaction between the upper reinforcing plate 303 and the lower reinforcing plate 304 can bear alternating bending moment loads, which can not only improve the bending resistance of the towing square beam 20, but also better protect the towing square beam 20, thereby improving the strength and reliability of the overall structure.

[0049] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the length of the first plate portion 301 in the left-right direction is equal to the size of the towing square beam 20 in the left-right direction, and the length of the second plate portion 302 of the upper reinforcing plate 303 bent and extended relative to the first plate portion 301 is L3, and L3 satisfies the relationship: L3≥35mm; specifically, by making the length of the first plate portion 301 in the left-right direction equal to the size of the towing square beam 20 in the left-right direction, not only can the connection between the first plate portion 301 of the reinforcing plate 30 and the towing square beam 20 be made more tightly fitted, but also the force can be evenly distributed at the connection between the first plate portion 301 and the towing square beam 20, avoiding local stress concentration. In addition, it can also improve the manufacturing and assembly efficiency and improve the stability and reliability of the entire structure.

[0050] The length of the second plate portion 302 of the upper reinforcing plate 303 bent and extended relative to the first plate portion 301 is required to be greater than or equal to 35 mm. This can prevent the second plate portion 302 of the upper reinforcing plate 303 from being deformed or broken due to excessive stress, thereby ensuring the strength and durability of the upper reinforcing plate 303 structure.

[0051] The length of the second plate portion 302 of the lower reinforcing plate 304 that is bent and extended relative to the first plate portion 301 is L4, and L4 satisfies the relationship: L4 ≥ 55 mm. Specifically, the length of the second plate portion 302 of the lower reinforcing plate 304 that is bent and extended relative to the first plate portion 301 is required to be greater than or equal to 55 mm, so that the second plate portion 302 of the lower reinforcing plate 304 can be prevented from being deformed or broken due to excessive stress, and the strength and durability of the structure of the lower reinforcing plate 304 can be ensured.

[0052] Furthermore, since the lower reinforcing plate 304 is placed below the dragging square beam 20, it bears a greater load and is more susceptible to deformation. Therefore, according to the stress conditions of each reinforcing plate 30, the size of the upper reinforcing plate 303 is set smaller than the size of the lower reinforcing plate 304. This can ensure that each reinforcing plate 30 has sufficient strength, avoid the problem of the lower reinforcing plate 304 being easily deformed, and improve the reliability and stability of the overall structure.

[0053] Combination Figure 1 and Figure 4 As shown, the two second plate portions 302 of the lower reinforcing plate 304 are provided with safety chain connection holes 305. Specifically, by providing the safety chain connection holes 305 on the two second plate portions 302 of the lower reinforcing plate 304, when the towing ball head 40 connection device is disconnected, the safety chain can play a protective role, and can prevent the towing vehicle from being separated, thereby improving the stability and safety of the overall structure.

[0054] Combination Figure 1 , Figure 2 and Figure 7 As shown, the front end of the dragging square beam 20 at least partially extends out of the rear cross beam 10 and is welded and fixed to the rear cross beam 10, and the length of the front end of the dragging square beam 20 extending out of the rear cross beam 10 is L5, and L5 satisfies the relationship: L5 ≥ 15mm. Specifically, the front end of the dragging square beam 20 at least partially extends out of the rear cross beam 10 and is welded and fixed to the rear cross beam 10, which not only makes the connection between the dragging square beam 20 and the rear cross beam 10 simple, direct, stable and reliable, but also makes the welding area of ​​the dragging square beam 20 and the rear cross beam 10 all plane areas, which can reduce welding process defects and improve the bending stiffness of the weld. In addition, the length of the front end of the dragging square beam 20 extending out of the rear cross beam 10 is required to be greater than or equal to 15 mm, which can improve the welding effect between the dragging square beam 20 and the rear cross beam 10, improve the firmness and stability of the structure at the connection between the dragging square beam 20 and the rear cross beam 10, and further improve the stability and reliability of the overall structure, ensuring the good bearing performance of the overall structure.

[0055] Combination Figure 1 , Figure 3 and Figure 4As shown, the left and right sides of the towing square beam 20 are provided with pin shaft mounting holes 201, and the left and right sides of the towing ball head 40 are provided with through holes 401. The towing ball head 40 at least partially extends into the towing square beam 20. The two pin shaft mounting holes 201 and the two through holes 401 correspond to each other one by one and are fixed by pin shaft connection. Specifically, pin shaft mounting holes 201 are provided on the left and right sides of the towing square beam 20, and through holes 401 are provided on the left and right sides of the towing ball head 40, and the two pin shaft mounting holes 201 and the two through holes 401 correspond to each other in structure and position, so that the towing ball head 40 at least partially extends into the towing square beam 20, and the pin shaft mounting holes 201 on the towing square beam 20 and the through holes 401 on the towing ball head 40 system are sequentially penetrated by the pin shaft, so that the left and right sides of the towing square beam 20 and the towing ball head 40 are connected and fixed, which not only makes the connection between the towing square beam 20 and the towing ball head 40 simple and direct, but also ensures the stability of the connection between the towing square beam 20 and the towing ball head 40, and can prevent the towing ball head 40 connection system from falling off. In addition, it is convenient to disassemble the towing square beam 20 and the towing ball head 40, which is convenient for subsequent maintenance or replacement.

[0056] Combination Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, a tightening installation hole 202 is provided on the upper side of the towing square beam 20. Specifically, by providing the tightening installation hole 202 on the upper side of the towing square beam, the connection between the towing square beam 20 and the towing ball head 40 can be further strengthened, and the towing ball head 40 can be prevented from shaking up and down in the towing square beam 20, effectively preventing the towing ball head 40 connection system from falling out, and further improving the stability and reliability of the overall structure.

[0057] According to the vehicle 100 of the present invention, in particular, since the vehicle 100 has a higher structural strength, a stronger bearing capacity, and good stability and reliability, the vehicle 100 is used to tow other vehicles, which can effectively improve the safety during the towing process, thereby improving the towing efficiency and preventing accidents.

[0058] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle, characterized in that: include: rear cross member; A dragging square beam, the dragging square beam extending in the front-rear direction and at least partially embedded in the rear cross beam, the rear end of the dragging square beam extending from the rear cross beam and provided with a reinforcing plate, the reinforcing plate being located on at least one side of the dragging square beam in the up-down direction and connected to the rear side of the rear cross beam, at least a portion of the left-right direction of the reinforcing plate tilting in the up-down direction toward a side away from the dragging square beam; A towing ball head is fixedly connected to the rear end of the towing square beam so as to be suitable for being connected to a tractor.

2. The vehicle according to claim 1, characterized in that The reinforcing plate includes a first plate portion and two second plate portions, the first plate portion is fitted and connected to the towing square beam, and the two second plate portions are arranged on the left and right sides of the first plate portion and are bent and extended relative to the first plate portion in the up and down directions away from the towing square beam.

3. The vehicle according to claim 2, characterized in that The bending angle of the second plate portion relative to the first plate portion is α, and α satisfies the relationship: α≥30°.

4. The vehicle according to claim 2, characterized in that There are two reinforcing plates, and the two reinforcing plates are respectively arranged on both sides of the towing square beam in the up and down directions.

5. The vehicle according to claim 4, characterized in that The two reinforcing plates are respectively an upper reinforcing plate and a lower reinforcing plate, the upper reinforcing plate is arranged on the upper side of the towing square beam, and the lower reinforcing plate is arranged on the lower side of the towing square beam, and the thickness of the upper reinforcing plate and the lower reinforcing plate in the up and down direction are equal and are both D, and D satisfies the relationship: D≥5mm; The width of the upper reinforcing plate in the front-to-back direction is L1, and the width of the lower reinforcing plate in the front-to-back direction is L2. L1 and L2 satisfy the relationship: 15mm≤L1≤45mm, 15mm≤L2≤45mm.

6. The vehicle according to claim 5, characterized in that The length of the first plate portion in the left-right direction is equal to the size of the towing square beam in the left-right direction, and the length of the second plate portion of the upper reinforcing plate bent and extended relative to the first plate portion is L3, and L3 satisfies the relationship: L3 ≥ 35 mm; The length of the second plate portion of the lower reinforcing plate bent and extended relative to the first plate portion is L4, and L4 satisfies the relationship: L4≥55mm.

7. The vehicle according to claim 5, characterized in that Safety chain connection holes are provided on the two second plate parts of the lower reinforcing plate.

8. The vehicle according to claim 1, characterized in that The front end of the towing square beam at least partially extends out of the rear cross beam and is welded and fixed to the rear cross beam. The length of the front end of the towing square beam extending out of the rear cross beam is L5, and L5 satisfies the relationship: L5≥15mm.

9. The vehicle according to claim 1, characterized in that The left and right sides of the towing square beam are provided with pin shaft mounting holes, the left and right sides of the towing ball head are provided with through holes, the towing ball head at least partially extends into the towing square beam, the two pin shaft mounting holes and the two through holes correspond to each other one by one and are connected and fixed by pin shafts.

10. The vehicle according to claim 1, characterized in that A tightening installation hole is provided on the upper side of the dragging square beam.

Images