Rear bumper and self-dumping semi-trailer

Abstract

This utility model provides a rear bumper and a dump semi-trailer, which are connected to the rear of the vehicle body. The bumper includes a support tube and a guide body. The support tube is tubular. The guide body's axial direction is aligned with the support tube's axial direction. The guide body's cross-sectional profile includes a first guide segment and a first connecting segment. The lower end of the first connecting segment and the lower end of the first guide segment are respectively connected to opposite sides of the upper end of the support tube. The upper end of the first connecting segment is connected to the upper end of the first guide segment, so that the first connecting segment, the first guide segment, and part of the support tube form a closed tubular structure. The included angle between the first connecting segment and the first guide segment is α, which is less than or equal to 90°, to effectively prevent items from falling and accumulating on the rear bumper.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a rear bumper and a dump semi-trailer. Background Technology

[0002] A dump semi-trailer consists of a body and a rear bumper. One end of the body is connected to the tractor unit to move with it. The body has storage space for holding goods. The rear bumper is connected to the end of the body furthest from the tractor unit to protect the end of the body, preventing it from being crushed under the body when hit by other vehicles. It also reduces the impact energy of other vehicles, protecting the body.

[0003] In related technologies, the rear bumper is typically rectangular and connected to the rear of the vehicle body via welded components. Items that fall off the vehicle body tend to accumulate on the upper side of the rear bumper. When a dump semi-trailer is unloading, the rear bumper can cause incomplete unloading, thus affecting unloading efficiency. Utility Model Content

[0004] The purpose of this application is to provide a rear bumper and semi-trailer that can effectively prevent the accumulation of items.

[0005] To solve the above-mentioned technical problems, this application adopts the following technical solution: According to one aspect of this application, a rear bumper is provided, which is connected to the rear of a vehicle body, and includes: a support tube and a guide; the support tube is tubular; the guide's axial direction is aligned with the axial direction of the support tube; the cross-sectional profile of the guide includes a first guide segment and a first connecting segment, the lower end of the first connecting segment and the lower end of the first guide segment are respectively connected to opposite sides of the upper end of the support tube, and the upper end of the first connecting segment is connected to the upper end of the first guide segment, so that the first connecting segment, the first guide segment and part of the support tube form a closed tubular structure; wherein, the included angle between the first connecting segment and the first guide segment is α, and α is less than or equal to 90°.

[0006] In some embodiments, the angle between the first guide segment and the horizontal plane is β, where β is greater than 45°.

[0007] In some embodiments, the guide body further includes a second guide segment, the two ends of which are respectively connected to the first guide segment and the first connecting segment; the included angle between the first guide segment and the second guide segment is γ, where γ is less than 90° and γ is greater than 45°.

[0008] In some embodiments, the first guide segment and the second guide segment have an arc transition, and the second guide segment and the first connecting segment have an arc transition.

[0009] In some embodiments, the guide body further includes a fixing segment connected to the end of the first guide segment away from the first connecting segment. The end of the fixing segment away from the first guide segment is bent toward the first connecting segment so that the outer wall of the fixing segment is fitted and connected to the support tube.

[0010] In some embodiments, the supporting tube includes a second connecting segment, an arc-shaped transition segment, and a supporting segment; the second connecting segment extends in a vertical direction, and its upper end is connected to the lower end of the first connecting segment; in a bottom-to-top direction, the arc-shaped transition segment is inclined in an arc shape away from the second connecting segment; one end of the arc-shaped transition segment is connected to the lower end of the second connecting segment, and the other end of the arc-shaped transition segment is connected to the supporting segment; the supporting segment extends horizontally toward the second connecting segment, so that the supporting segment, the arc-shaped transition segment, and the second connecting segment enclose a closed tubular structure.

[0011] In some embodiments, the ends of the first connecting segment and the second connecting segment that are far apart from each other are provided with protruding ribs, and the protruding ribs extend along the axial direction of the supporting tube.

[0012] In some embodiments, the first connecting segment and the second connecting segment form a receiving groove between the two convex ribs; the rear bumper also includes a reflector that extends along the extending direction of the convex ribs and is connected to the bottom wall of the receiving groove.

[0013] In some embodiments, the support segment is bent and includes a first support portion, a second support portion, and a third support portion; the first support portion and the third support portion both extend downward, the second support portion extends horizontally, and the first support portion and the third support portion are respectively located on both sides of the second support portion; the first support portion is connected to the end of the arc-shaped transition segment away from the second connecting segment, and the third support portion is fitted and connected to the second connecting segment.

[0014] A dump semi-trailer includes: a vehicle body and a rear bumper as described above; the rear bumper is connected to the rear of the vehicle body.

[0015] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: In this application, when the dump semi-trailer is unloading, the rear sidewall of the vehicle body opens, and the cargo inside the vehicle body is discharged to the outside through the rear sidewall. At this time, powdery or granular materials inside the vehicle body can slide off from the front and rear sides of the rear bumper under the guidance of the first guide section and the first connecting section, thereby avoiding cargo residue on the rear bumper and improving cargo unloading efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the rear bumper of this utility model.

[0017] Figure 2 yes Figure 1 The diagram shows a structural schematic from another perspective.

[0018] Figure 3 yes Figure 1 The diagram shows the structure from other perspectives.

[0019] Figure 4 The cross-sectional outline of the rear bumper of this utility model.

[0020] The reference numerals in the attached drawings are explained as follows: 100, support tube; 110, second connecting section; 120, arc-shaped transition section; 130, support section; 131, first support part; 132, second support part; 133, third support part; 200, guide body; 210, first connecting section; 220, first guide section; 230, second guide section; 240, fixing section; 241, first fixing part; 242, second fixing part; 311, protruding rib; 312, receiving groove. Detailed Implementation

[0021] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In related technologies, a dump semi-trailer includes a body and a rear bumper. The body extends horizontally. The front of the body connects to the cab for following its movement. The rear of the body connects to the rear bumper. The rear bumper cushions the impact energy from external vehicles.

[0024] For ease of understanding and description, the state of a dump semi-trailer in use will be used as a reference. The vertical direction of the dump semi-trailer will be referred to as the vertical direction in the following text, the front-back direction of the dump semi-trailer will be referred to as the front-back direction in the following text, and the direction perpendicular to the vertical and front-back directions will be referred to as the left-right direction in the following text.

[0025] Figure 1 This is a schematic diagram of the structure of the rear bumper of this utility model. Figure 2 yes Figure 1 The diagram shows a structural schematic from another perspective.

[0026] See Figure 1 and Figure 2 This application provides a rear bumper that extends in a left-right direction. The front side of the rear bumper connects to the rear of the vehicle body to protect the rear of the vehicle body.

[0027] See Figure 1 and Figure 2 The rear bumper may include a support tube 100 and a guide 200. The support tube 100 is tubular. The axial direction of the guide 200 is aligned with the axial direction of the support tube 100. The cross-sectional profile of the guide 200 includes a first guide section 220 and a first connecting section 210. The lower ends of the first connecting section 210 and the first guide section 220 are respectively connected to opposite sides of the upper end of the support tube 100. The upper ends of the first connecting section 210 and the first guide section 220 are connected to each other, so that the first connecting section 210, the first guide section 220, and part of the support tube 100 enclose a closed tubular structure. The included angle between the first connecting section 210 and the first guide section 220 is α, where α is less than or equal to 90°. When the dump semi-trailer is unloading, the rear sidewall of the vehicle body opens, and the cargo inside the vehicle body is discharged to the outside through the rear sidewall. At this time, powdery and granular materials inside the vehicle body can slide off from the front and rear sides of the rear bumper under the guidance of the first guide section 220 and the first connecting section 210, thereby avoiding cargo residue on the rear bumper and improving cargo unloading efficiency.

[0028] When a dump semi-trailer is in motion, if powder or granular materials on the vehicle body fall off due to factors such as impact, vibration, and wind resistance during transportation, the fallen materials can slide off to the front and rear sides of the rear bumper under the guidance of the first guide section 220 and the first connecting section 210.

[0029] On the one hand, this rear bumper effectively prevents items from falling and accumulating on it, avoiding the situation where accumulated items on the rear bumper simultaneously fall to the ground, thus preventing excessive items from forming road obstacles and preventing the wheels of following vehicles from slipping, ensuring the safety of following vehicles. On the other hand, the guide body 200, in addition to preventing items from accumulating on the rear bumper, also prevents the components of the items or substances attached to the items from causing electrochemical corrosion on the surface of the rear bumper, thereby ensuring the structural strength and reliability of the rear bumper.

[0030] Furthermore, the first guide section 220 can also guide the airflow of the dump semi-trailer during its operation, thereby reducing the wind resistance of the dump semi-trailer.

[0031] It is understood that the rear bumper of this application is a tubular structure extending in the left-right direction. For ease of understanding and description, the structure of the rear bumper is divided into structures such as the first guide section 220 and the first connecting section 210 in a cross-section perpendicular to the left-right direction. However, in reality, the first guide section 220 and the first connecting section 210 are plate-like structures extending in the left-right direction. The following segment structures are also all plate materials extending in the left-right direction.

[0032] Figure 3 yes Figure 1 The diagram shows the structure from other perspectives. Figure 4 The cross-sectional outline of the rear bumper of this utility model.

[0033] See Figure 3 and Figure 4 In this embodiment, the guide body 200 may include a first connecting segment 210. The first connecting segment 210 extends vertically. The lower end of the first connecting segment 210 is used to connect with the support tube 100.

[0034] See Figure 3 and Figure 4 In this embodiment, the guide block may include a first guide segment 220. The first guide segment 220 is located in front of the first connecting segment 210. The first guide segment 220, the first connecting segment 210, and the outer wall of part of the support tube 100 form a tubular structure to improve the structural strength and reliability of the rear bumper.

[0035] In some embodiments, the angle between the first guide segment 220 and the horizontal plane is β. β is greater than 45°. The angle β between the first guide segment 220 and the horizontal plane is greater than the angle of repose of the item, so that items falling from the vehicle body can fall under the rear bumper under the action of gravity after contacting the first guide segment 220, thereby preventing items from accumulating on the rear bumper and thus preventing fallen items from forming road obstacles and improving the safety of following vehicles.

[0036] See Figure 4In this embodiment, the guide body 200 may further include a second guide segment 230. The two ends of the second guide segment 230 are respectively connected to the first guide segment 220 and the first connecting segment 210. The included angle between the first guide segment 220 and the second guide segment 230 is γ, where γ is less than 90° and greater than 45°.

[0037] The angle γ between the first guide segment 220 and the second guide segment 230 is an acute angle, so that the angle between the second guide segment 230 and the horizontal plane is greater than 45°, thereby making the angle between the second guide segment 230 and the horizontal plane greater than the angle of repose of the object.

[0038] When an external object falls onto the rear bumper, guided by the first guide section 220 and the second guide section 230, the object passes over the rear bumper and falls to the lower side of the rear bumper, thereby preventing the goods from piling up on the rear bumper.

[0039] In some embodiments, the guide body 200 may further include a fixing segment 240. The fixing segment 240 is connected to the end of the first guide segment 220 away from the first connecting segment 210, and the end of the fixing segment 240 away from the first guide segment 220 is bent toward the first connecting segment 210 so that the outer wall of the fixing segment 240 is fitted and connected to the support tube 100.

[0040] On the one hand, the fixed section 240 is used to form a closed-section tubular structure with the first guide section 220, the second guide section 230, the first connecting section 210, and the support tube 100, thereby effectively improving the structural strength and reliability of the rear bumper. On the other hand, the bent fixed end can increase the connection area with the support tube 100, thereby improving the connection strength between the first guide section 220 and the support tube 100, and improving the reliability and stability of the rear bumper.

[0041] See Figure 4 In this embodiment, the fixing segment 240 may include a first fixing part 241 and a second fixing part 242. The first fixing part 241 extends vertically, and its upper end is connected to the lower end of the first guide segment 220. The second fixing part 242 is connected to the lower end of the first fixing part 241, and extends horizontally toward the first connecting segment 210 to increase the connection area between the second connecting part and the support tube 100, thereby increasing the connection strength between the second connecting part and the support tube 100.

[0042] In some embodiments, the first fixing part 241 may be arranged perpendicularly to the second fixing part 242 to improve the bending and lateral displacement resistance between the first fixing part 241 and the second fixing part 242, thereby improving the deformation resistance of the rear bumper and ensuring the structural strength and reliability of the rear bumper.

[0043] In some embodiments, the outer wall of the first fixing part 241 can be used to connect with the vehicle body so that the impact load carried by the first connecting section 210 can be evenly transferred to the vehicle body through the first fixing part 241 under the action of the first guide section 220, the second guide section 230, and the second fixing part 242, thereby ensuring the load-bearing capacity and impact resistance of the rear bumper.

[0044] See Figure 4 In this embodiment, the first guide segment 220 can transition to the second guide segment 230 in an arc shape, which can significantly reduce stress concentration and prevent cracks from appearing in the rear bumper due to excessive local stress. Furthermore, the arc transition can optimize the impact force transmission path, improve load-bearing capacity, enhance deformation resistance, and ensure the structural durability of the rear bumper.

[0045] In some embodiments, the second guide segment 230 may have an arc transition with the first connecting segment 210.

[0046] In some embodiments, the first guide segment 220 may be arc-shaped to the first fixing portion 241.

[0047] See Figure 4 In this embodiment, the support tube 100 is provided with a guide body 200 on the lower side to connect with the fixed section 240 and the first connecting section 210, thereby further improving the structural strength and impact resistance of the rear bumper.

[0048] The supporting tube 100 may include a second connecting section 110, an arc-shaped transition section 120, and a supporting section 130. The second connecting section 110 extends vertically, and its upper end is connected to the lower end of the first connecting section 210. The arc-shaped transition section 120 is inclined in an arc shape away from the second connecting section 110 in an upward direction. One end of the arc-shaped transition section 120 is connected to the lower end of the second connecting section 110, and the other end is connected to the supporting section 130. The supporting section 130 extends horizontally toward the second connecting section 110, so that the supporting section 130, the arc-shaped transition section 120, and the second connecting section 110 enclose a tubular structure with a closed cross-section.

[0049] On the one hand, the second connecting section 110, the arc-shaped transition section 120, and the support section 130 enclose a tubular structure with a closed cross-section, which can effectively improve the structural strength and impact resistance of the rear bumper. On the other hand, in the direction from bottom to top, the arc-shaped transition section 120 is set away from the second connecting section 110 in an arc-shaped inclination, so that the arc-shaped transition section 120 can guide the airflow during the driving of the dump semi-trailer, thereby reducing the wind resistance of the rear bumper.

[0050] See Figure 4In this embodiment, the first connecting segment 210 and the second connecting segment 110 can be integrally formed to improve the structural strength of the rear bumper.

[0051] In some embodiments, the first connecting segment 210 and the second connecting segment 110 can be straight profiles extending in the vertical direction.

[0052] In this embodiment, the ends of the first connecting segment 210 and the second connecting segment 110 that are far apart from each other are both provided with protruding ribs 311. The protruding ribs 311 extend along the axial direction of the supporting tube 100, so as to significantly improve the rear bumper's resistance to torsional deformation, thereby ensuring the structural strength and reliability of the rear bumper.

[0053] In some embodiments, the first connecting segment 210 and the second connecting segment 110 form a receiving groove 312 between the two protruding ribs 311.

[0054] The rear bumper may also include reflectors (not shown in the figure). The reflectors extend along the extension direction of the rib 311 and are connected to the bottom wall of the receiving groove 312 to reflect external light, thereby ensuring the safety and reliability of the dump semi-trailer during operation.

[0055] In some embodiments, the arc transition section 120 may transition arc-shaped to the rib portion 311 of the second connecting section 110 to improve the load-bearing capacity and deformation resistance of the arc transition section 120 and the second connecting section 110.

[0056] See Figure 4 In this embodiment, the support segment 130 is bent. One end of the support segment 130 is connected to the end of the arc-shaped transition segment 120 away from the second connecting segment 110, and the other end of the support segment 130 is connected to the second connecting segment 110, so that the support segment 130, the arc-shaped transition segment 120 and the second connecting segment 110 can be closed to form a tubular structure, thereby effectively improving the structural strength and reliability of the support tube 100.

[0057] See Figure 4 In this embodiment, the support segment 130 may include a first support portion 131, a second support portion 132, and a third support portion 133. Both the first support portion 131 and the third support portion 133 extend downwards. The second support portion 132 extends horizontally to connect with the fixing segment 240. The first support portion 131 and the third support portion 133 are located on opposite sides of the second support portion 132. The first support portion 131 is connected to the end of the arc-shaped transition segment 120 away from the second connecting segment 110. The third support portion 133 is fitted and connected to the second connecting segment 110.

[0058] The bending design of the support section 130 allows for a large-angle transition connection between the arc-shaped transition section 120 and the support section 130, optimizing the force transmission path and avoiding stress concentration at the connection point. Furthermore, the bending design of the support section 130 also improves the overall structural strength and impact resistance of the support tube 100, enabling the rear bumper to meet the safety performance requirements of dump semi-trailers even with thinner materials, thereby further reducing the manufacturing cost of the rear bumper.

[0059] In some embodiments, the second support portion 132 may be fitted and connected to the second fixing portion 242 to further increase the contact area between the support tube 100 and the guide 200, thereby effectively improving the overall structural strength and reliability of the rear bumper.

[0060] In some embodiments, the connection between the first support portion 131 and the arc-shaped transition section 120 is an arc-shaped transition to improve the connection strength between the two.

[0061] In some embodiments, the connection between the first support portion 131, the second support portion 132 and the third support portion 133 can be an arc transition to improve the structural strength of the support segment 130.

[0062] In some embodiments, the first support portion 131 and the second support portion 132 may be vertically arranged. The second support portion 132 and the third support portion 133 may be vertically arranged to improve the bending and lateral displacement resistance of the first support portion 131, the second support portion 132 and the third support portion 133, thereby improving the deformation resistance of the rear bumper and ensuring the structural strength and reliability of the rear bumper.

[0063] See Figure 4 In this embodiment, the second connecting section 110, the arc-shaped transition section 120, and the support section 130 within the support tube 100 can be integrally formed, which can further improve the structural strength and reliability of the support tube 100, simplify the production steps of the support tube 100, and reduce the production cost of the support tube 100.

[0064] In some embodiments, the support tube 100 may be formed by rolling a single sheet of material.

[0065] See Figure 4 In this embodiment, the first connecting section 210, the second guiding section 230, the first guiding section 220 and the fixing section 240 in the guide body 200 can also be integrally formed to further improve the structural strength and reliability of the support tube 100.

[0066] In some embodiments, the guide body 200 may be formed by rolling a single sheet of material.

[0067] See Figure 4 In this embodiment, the guide body 200 can be integrally formed with the support tube 100. The guide body 200 and the support tube 100 can be formed by rolling from a single piece of sheet metal, thereby further improving the overall structural strength and impact resistance of the rear bumper, and reducing the production steps and costs of the rear bumper.

[0068] See Figure 4 In this embodiment, the projection of the first fixing part 241 coincides with the projection of the first supporting part 131 in the horizontal projection plane. On the one hand, this prevents items from accumulating on the upper surface of the second supporting part 132 during the falling process, thereby preventing accumulated items from falling simultaneously and forming road obstacles. On the other hand, it facilitates the connection between the rear bumper and the vehicle body through the first fixing part 241 and the first supporting part 131, thereby improving the connection strength and reliability between the rear bumper and the vehicle body, and thus improving the overall load-bearing capacity and impact resistance of the dump semi-trailer.

[0069] See Figure 4 In this embodiment, the support tube 100 may not require the arc-shaped transition section 120. The support tube 100 may include a second connecting section 110, a sloping-straight transition section, and a support section 130. One end of the sloping-straight transition section is connected to the lower end of the second connecting section 110, and the other end is connected to the support section 130. In the direction from bottom to top, the sloping-straight transition section is inclined in a straight line away from the second connecting section 110, so that the second connecting section 110, the sloping-straight transition section, and the support section 130 can be enclosed to form a tubular structure with a closed cross-section. This ensures the structural strength of the support tube 100 while allowing the sloping-straight transition section to guide gas and reduce wind resistance.

[0070] See Figure 4 In this embodiment, the rear bumper may further include end caps (not shown in the figure). The end caps are respectively installed at both ends of the support tube 100 and the guide 200 along their length, so that the support tube 100, the guide 200, and the two end caps can form a fully enclosed structure, thereby further improving the structural strength of the rear bumper. Furthermore, it can prevent external debris from entering the inside of the rear bumper.

[0071] See Figures 1 to 4 This application provides a rear bumper that is connected to the rear of the vehicle body so that it can move with the vehicle body.

[0072] When unloading cargo from the vehicle, the rear bumper can effectively improve the unloading efficiency and prevent cargo from remaining on the rear bumper.

[0073] When a dump semi-trailer is in motion, items on the vehicle may fall onto the rear bumper due to unforeseen circumstances and collide with the first guide section 220 and the second guide section 230. At this point, the fallen items will slide off to the front and rear sides of the rear bumper under the guidance of the first guide section 220 and the second guide section 230, thus preventing items from accumulating on the rear bumper and falling to the ground simultaneously. This avoids excessive items forming road obstacles, preventing wheel slippage for following vehicles and ensuring their safety.

[0074] This application also provides a dump semi-trailer, which includes: a vehicle body and a rear bumper as described above. The rear bumper is connected to the rear of the vehicle body.

[0075] On the one hand, the rear bumper protects the rear of the vehicle and prevents following vehicles from colliding with dump semi-trailers and getting under them. On the other hand, the rear bumper prevents items falling from the vehicle from accumulating on it, avoiding situations where items piled on the rear bumper fall to the ground simultaneously, thus preventing excessive items from forming road obstacles and preventing the wheels of following vehicles from slipping, ensuring the safety of vehicles behind.

[0076] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0077] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A rear bumper, connected to the rear of a vehicle body, characterized in that, include: The supporting tube is tubular in shape; The guide body has its axis aligned with that of the support tube. The cross-sectional profile of the guide body includes a first guide segment and a first connecting segment. The lower end of the first connecting segment and the lower end of the first guide segment are respectively connected to opposite sides of the upper end of the support tube. The upper end of the first connecting segment is connected to the upper end of the first guide segment, so that the first connecting segment, the first guide segment, and part of the support tube form a closed tubular structure. The included angle between the first connecting segment and the first guiding segment is α, where α is less than or equal to 90°.

2. The rear bumper according to claim 1, characterized in that, The angle between the first guide segment and the horizontal plane is β, and β is greater than 45°.

3. The rear bumper according to claim 1, characterized in that, The guide body further includes a second guide segment, the two ends of which are respectively connected to the first guide segment and the first connecting segment; the included angle between the first guide segment and the second guide segment is γ, where γ is less than 90° and greater than 45°.

4. The rear bumper according to claim 3, characterized in that, The first guide segment and the second guide segment have an arc transition, and the second guide segment and the first connecting segment have an arc transition.

5. The rear bumper according to claim 1, characterized in that, The guide body further includes a fixing section, which is connected to the end of the first guide section away from the first connecting section. The end of the fixing section away from the first guide section is bent toward the first connecting section so that the outer wall of the fixing section is attached to the support tube.

6. The rear bumper according to claim 1, characterized in that, The supporting tube includes a second connecting section, an arc-shaped transition section, and a supporting section; the second connecting section extends vertically, and its upper end is connected to the lower end of the first connecting section; in the upward direction, the arc-shaped transition section is inclined in an arc shape away from the second connecting section; one end of the arc-shaped transition section is connected to the lower end of the second connecting section, and the other end of the arc-shaped transition section is connected to the supporting section; the supporting section extends horizontally toward the second connecting section, so that the supporting section, the arc-shaped transition section, and the second connecting section enclose a closed tubular structure.

7. The rear bumper according to claim 6, characterized in that, The ends of the first connecting segment and the second connecting segment that are far apart from each other are provided with protruding ribs, and the protruding ribs extend along the axial direction of the supporting tube.

8. The rear bumper according to claim 7, characterized in that, The first connecting segment and the second connecting segment form a receiving groove between the two protruding ribs; The rear bumper also includes a reflector that extends along the extension direction of the rib and is connected to the bottom wall of the receiving groove.

9. The rear bumper according to claim 6, characterized in that, The support segment is bent and includes a first support part, a second support part, and a third support part; the first support part and the third support part both extend downward, the second support part extends horizontally, and the first support part and the third support part are respectively located on both sides of the second support part; the first support part is connected to the end of the arc-shaped transition segment away from the second connecting segment, and the third support part is fitted and connected to the second connecting segment.

10. A self-dumping semi-trailer, characterized in that, include: Vehicle body; The rear bumper as described in any one of claims 1-9 is connected to the rear of the vehicle body.

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