Semitrailer and multifunctional rear protection

Abstract

The utility model relates to the technical field of semitrailers, in particular to a semitrailer and a multifunctional rear protection device arranged at the tail of a frame of the semitrailer, and the multifunctional rear protection device comprises an upper crosspiece, a lower crosspiece and stand columns. The upper crosspiece extends in the transverse direction and is arranged at the tail of the frame, and the top face of the upper crosspiece is flush with the top face of the frame. The lower crosspiece extends in the transverse direction and is located below the upper crosspiece in a spaced mode. The stand columns are arranged between the upper crosspiece and the lower crosspiece, the stand columns obliquely extend downwards from the head end to the tail end, the lower crosspiece exceeds the upper crosspiece towards the tail end, and therefore an anti-collision buffering function area can be formed at the tail of the frame of the semitrailer. When a rear-end collision accident happens to the semitrailer, the multifunctional rear protection device can be in contact with a rear vehicle preferentially, and the impact force of the rear vehicle on the frame is reduced through the anti-collision buffering function area, so that the rear vehicle is prevented from directly colliding with the frame and a tank body on the frame, the rear vehicle and the tank body on the frame can be effectively protected, and the transportation safety of the semitrailer is improved.

Description

Technical Field

[0001] This disclosure belongs to the field of semi-trailer technology, specifically relating to a semi-trailer and a multi-functional rear protection system. Background Technology

[0002] Currently, the rear protection installed at the rear of a semi-trailer frame consists of transverse components and connecting structures. The side of these transverse and connecting structures facing away from the frame is almost flush with the rear of the frame. In a rear-end collision, the rear protection is highly susceptible to deformation under the impact, allowing following vehicles to penetrate the rear protection and violently impact the tank on the frame, potentially damaging the tank and causing significant losses. Furthermore, when the tank is a hazardous materials container, because it is flush with the rear protection, the tank will also deform upon impact. In severe cases, the hazardous materials inside the tank may leak, posing a hazard to transport personnel and the environment. Utility Model Content

[0003] The purpose of this application is to provide a semi-trailer and a multi-functional rear protection system, in which the lower crossbar extends downward from the front end to the rear end, thereby exceeding the upper crossbar at the rear end, thus forming a collision buffer zone at the rear of the semi-trailer frame to improve the safety of semi-trailer transportation.

[0004] This disclosure provides a multifunctional rear protection device, located at the rear of the semi-trailer frame, comprising:

[0005] An upper crossbar extends laterally and is located at the rear of the frame, with its top surface flush with the top surface of the frame.

[0006] The lower crossbar extends laterally and is spaced below the upper crossbar;

[0007] A column is connected between the upper crossbar and the lower crossbar, and the column extends downward at an angle from the first end to the last end, so that the lower crossbar extends beyond the upper crossbar at the last end.

[0008] In an exemplary embodiment of this disclosure, the column includes a first part and a second part connected to each other. The first part is connected to the upper crossbar and slopes downward from front to back. The second part is connected to the end of the first part away from the upper crossbar and extends in the vertical direction.

[0009] The multi-functional rear protection includes two pillars, which are symmetrically arranged about the central axis of the frame.

[0010] In an exemplary embodiment of this disclosure, a liquid collection component is provided between the two columns. The liquid collection component has an upward-opening liquid collection trough. The opening of the liquid collection trough is lower than the highest end of the first part, and the bottom of the liquid collection trough is not lower than the lowest end of the second part. The liquid collection trough is used to be opposite to the unloading valve on the semi-trailer.

[0011] In one exemplary embodiment of this disclosure, the multifunctional rear protection includes a primary pedal disposed on the top surface of the lower crossbar and located between the two uprights.

[0012] In one exemplary embodiment of this disclosure, the multifunctional rear protection includes a secondary pedal located above the lower crossbar, the secondary pedal being situated between the two uprights and connected to at least one side of the liquid accumulation component near the upright; the top surface of the secondary pedal is flush with the opening of the liquid accumulation trough.

[0013] In one exemplary embodiment of this disclosure, the upper crossbar is provided with a three-stage pedal, which is connected to the side of the upper crossbar near the column and extends horizontally along the side away from the upper crossbar.

[0014] In one exemplary embodiment of this disclosure, the two columns are provided with handrail holes on the first portion, and the handrail holes on the two columns are symmetrically arranged with respect to the upper crossbar.

[0015] In one exemplary embodiment of this disclosure, the multifunctional back protection includes:

[0016] An outer sealing plate is located between the two columns, and its opposite ends in the horizontal direction are connected to the two columns. The bottom surface of the outer sealing plate abuts against the top surface of the lower crossbar, and the top surface of the outer sealing plate is not higher than the top surface of the first part. The outer sealing plate has an alignment through hole, which is provided through the outer sealing plate.

[0017] A receiving frame is located between the two columns. The receiving frame includes a base plate and a bent plate arranged around the side of the base plate. The side of the bent plate away from the base plate is connected to the inner side of the outer sealing plate. The orthographic projection of the receiving frame on the outer sealing plate covers the alignment through hole. A receiving groove is formed between the outer sealing plate and the receiving frame.

[0018] The bending plate located at the bottom of the base plate is provided with a water leakage hole, which is provided through the bending plate.

[0019] In one exemplary embodiment of this disclosure, the column includes a first reinforcing member, the top surface of the first reinforcing member being connected to the bottom surface of the first portion, the front end surface of the first reinforcing member being connected to the upper crossbar, and the rear end surface of the first reinforcing member being connected to the inner surface of the second portion.

[0020] In one exemplary embodiment of this disclosure, the column includes a second reinforcing member, the top surface of which is connected to the bottom surface of the first reinforcing member, the front end surface of which is connected to the rear end of the frame, and the rear end surface of which is connected to the inner surface of the second portion; the lateral width of the second reinforcing member is greater than the lateral width of the first reinforcing member; and / or,

[0021] The multifunctional rear protection includes a diagonal brace, the lower end of which abuts against the inner side of the bottom of the second part, the diagonal brace extending obliquely upward toward the upper crossbar, and its top end abutting against the bottom surface of the first reinforcing member.

[0022] This disclosure provides a semi-trailer, including a frame and a multi-functional rear guard as described in any of the preceding claims, disposed at the rear of the frame.

[0023] The technical solutions provided in this disclosure have at least the following advantages:

[0024] This disclosure creates a collision buffer zone at the rear of the semi-trailer frame by installing a column between the upper and lower crossbars and extending the column downwards at an angle from the front to the rear, causing the lower crossbar to extend beyond the upper crossbar at the rear. In the event of a rear-end collision, the multi-functional rear protection system can prioritize contact with the following vehicle and reduce the impact force on the frame through the collision buffer zone, preventing the following vehicle from directly colliding with the frame and the tank on the frame. This effectively protects the following vehicle and the tank on the frame, thus improving the safety of semi-trailer transportation.

[0025] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0028] Figure 1 A front view schematic diagram of the multifunctional rear protection structure in an embodiment of this disclosure is shown.

[0029] Figure 2 It shows Figure 1 A schematic diagram of the cross-sectional structure at point AA.

[0030] Figure 3 A top view of the multifunctional rear protection structure in an embodiment of this disclosure is shown.

[0031] Figure 4 A front view structural schematic diagram of the outer cover plate and the receiving frame in an embodiment of this disclosure is shown.

[0032] Figure 5 A side view of the outer cover plate and the receiving frame in an embodiment of this disclosure is shown.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Multifunctional rear protection; 21. Upper crossbar; 211. L-shaped connecting plate; 22. Lower crossbar; 3. Upright post; 31. Dangerous goods sign; 32. First part; 321. Handrail hole; 33. Second part; 34. First reinforcing member; 35. Second reinforcing member; 36. Diagonal brace; 4. Liquid collection part; 5. First-level pedal; 6. Second-level pedal; 7. Third-level pedal; 8. Outer sealing plate; 81. Alignment through hole; 9. Reception frame; 91. Base plate; 92. Bending plate; X, lateral; Y, longitudinal; Z, vertical. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0036] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0037] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present application, and should not be construed as limiting the present application.

[0038] like Figures 1 to 5 As shown, this embodiment of the present disclosure provides a multi-functional rear guard 1, which is installed at the rear of the semi-trailer frame. The multi-functional rear guard 1 includes an upper crossbar 21, a lower crossbar 22, and a pillar 3.

[0039] The upper crossbar 21 extends laterally (X) and is located at the rear of the frame, with its top surface flush with the top surface of the frame. The lower crossbar 22 extends laterally (X) and is spaced below the upper crossbar 21. A column 3 connects the upper crossbar 21 and the lower crossbar 22, extending downwards at an angle from the front to the rear, causing the lower crossbar 22 to extend beyond the upper crossbar 21 at the rear.

[0040] Specifically, the column 3 in this disclosure can be welded to the upper crossbar 21 and the lower crossbar 22. Furthermore, in the longitudinal direction Y, the lower crossbar 22 is located on the side of the upper crossbar 21 away from the frame, and the lower crossbar 22 and the upper crossbar 21 are spaced apart. In the vertical direction Z, the lower crossbar 22 is located below the upper crossbar 21, and the lower crossbar 22 is also spaced apart from the upper crossbar 21.

[0041] It should be noted that the longitudinal direction Y in the above refers to the direction from the front to the rear of the frame, and the lateral direction X refers to... Figure 1 The middle horizontal bar 21 is in the direction from left to right, and the vertical Z refers to Figure 1 The direction from top to bottom.

[0042] This disclosure involves installing a column 3 extending downwards at an angle from the front end to the rear end between the upper crossbar 21 and the lower crossbar 22, and connecting the upper crossbar 21 and the lower crossbar 22 to the front and rear ends of the column 3, respectively. This allows the multi-functional rear protection 1 to extend along the direction away from the rear of the semi-trailer frame, forming a longitudinally Y-shaped anti-collision buffer zone at the rear of the semi-trailer frame. When the semi-trailer is involved in a rear-end collision, the multi-functional rear protection 1 can preferentially contact the following vehicle and reduce the impact force of the following vehicle on the frame through the anti-collision buffer zone, thereby preventing the following vehicle from directly colliding with the frame and the tank on the frame. This effectively protects the following vehicle and the tank on the frame, improving the safety of semi-trailer transportation.

[0043] In some embodiments, the longitudinal Y distance of the anti-collision buffer functional area can be 500mm, that is, the distance between the lower crossbar 22 and the upper crossbar 21 in the longitudinal Y direction can be 500mm, so as to ensure that when the semi-trailer is rear-ended, the anti-collision buffer functional area can have sufficient blocking force to improve the problem that the following vehicle breaks through the lower crossbar 22 on the semi-trailer and enters the frame, causing a collision with the tank on the frame.

[0044] In some embodiments, the tank on the chassis can be a hazardous materials tank container. In this case, the anti-collision buffer zone made of the multi-functional rear protection 1 can also reduce the impact force of the following vehicle on the chassis, thereby reducing the risk of tank damage and thus reducing the harm to transport personnel and the environment caused by the leakage of hazardous media inside the tank. In this case, the present disclosure can also set a hazardous materials sign 31 in the multi-functional rear protection 1 to warn following vehicles.

[0045] In some embodiments, the upper crossbar 21 may be provided with an angle lock on its top surface facing away from the lower crossbar 22 in the vertical Z direction, so as to fix the body and frame of the semi-trailer and prevent the semi-trailer from overturning or shifting due to unstable center of gravity or road bumps, potholes and other factors during driving.

[0046] The number of corner locks on the upper horizontal bar 21 can be two, and the two corner locks can be symmetrically set at opposite ends on the horizontal X-axis of the upper horizontal bar 21.

[0047] In some embodiments, a taillight may be provided on the bottom surface of the upper crossbar 21 near the lower crossbar 22 in the vertical Z direction. The upper crossbar 21 may have two taillights, which may be symmetrically arranged at opposite ends in the horizontal X direction of the upper crossbar 21.

[0048] Furthermore, an L-shaped connecting plate 211 can be installed on the multi-functional rear protection 1. The L-shaped connecting plate 211 is connected to the upper crossbar 21, and the taillight can be connected to the L-shaped connecting plate 211 to achieve connection between the taillight and the upper crossbar 21. The L-shaped connecting plate 211 and the upper crossbar 21 can be welded together. The taillight and the L-shaped connecting plate 211 can be detachably connected by bolts, thus facilitating the maintenance and replacement of the taillight.

[0049] In some embodiments, the lower crossbar 22 may be in the form of a (160mm×60mm) C-beam to reduce the weight of the lower crossbar 22 while improving its cross-sectional properties and strength, thereby enhancing its impact resistance and preventing the risk of a following vehicle breaking through the lower crossbar 22 on the semi-trailer and entering the frame, causing a collision with the tank on the frame.

[0050] In some embodiments, the upright 3 may include a first portion 32 and a second portion 33 connected to each other. The first portion 32 is connected to the upper crossbar 21 and slopes downward from front to back. The second portion 33 is connected to the end of the first portion 32 away from the upper crossbar 21 and extends vertically, that is, the second portion 33 extends vertically in the Z direction. The direction of the first portion 32 from front to back is the direction from the front to the rear of the frame.

[0051] However, this is not the only possibility. In some embodiments, the upright 3 may also be a structure that extends in a straight line from its first end to its last end. Alternatively, in other embodiments, the first portion 32 of the upright 3 may extend horizontally from front to back, and the second portion 33 may be inclined from top to bottom in a direction away from the upper crossbar 21. That is, any other shape of the upright 3 that allows the upper crossbar 21 and the lower crossbar 22 to be spaced apart in the vertical Z and longitudinal Y directions, and the lower crossbar 22 to be located on the side of the upper crossbar 21 away from the frame, can be included in the embodiments of this disclosure.

[0052] It should be noted that when the column 3 includes the first part 32 and the second part 33, the column 3 can be welded together from the first part 32 and the second part 33, but it is not limited to this. The column 3 can also be formed by bending the first part 32 and the second part 33.

[0053] For example, the column 3 in this disclosure can be formed of slats, and the column 3 has a certain width in the transverse X direction. This can enhance the rigidity of the column 3 while increasing the contact surface of the column 3 when colliding with the following vehicle, thereby reducing contact stress and thus reducing the risk of damage to the column 3, and improving the protective performance of the multi-functional rear guard 1 for the vehicle frame and tank. However, it is not limited to this, and the column 3 in this disclosure can also be made of other shapes than slats, depending on the actual situation.

[0054] In some embodiments, the column 3 may include a first reinforcing member 34. The top surface of the first reinforcing member 34 is connected to the bottom surface of the first portion 32, the front end of the first reinforcing member 34 facing away from the second portion 33 is connected to the upper crossbar 21, and the rear end of the first reinforcing member 34 is connected to the inner side surface of the second portion 33. The shapes of the top and rear end of the first reinforcing member 34 can be adapted to the bottom surface of the first portion 32 and the inner side surface of the second portion 33, respectively. That is, the top surface of the first reinforcing member 34 can be completely attached to and connected to the bottom surface of the first portion 32, and the rear end of the first reinforcing member 34 can be completely attached to and connected to the inner side surface of the second portion 33, thereby strengthening the stability of the connection between the first reinforcing member 34 and the first and second portions 33. Additionally, in some embodiments, the front end of the first reinforcing member 34 can also be connected to the frame to strengthen the stability of the connection between the column 3 and the frame. In this disclosure, the top surface of the first reinforcing member 34 refers to the side of the first reinforcing member 34 closest to the upper crossbar 21 in the vertical Z direction. The front end face of the first reinforcing member 34 refers to the end face of the first reinforcing member 34 that is away from the second part 33, and the rear end face of the first reinforcing member 34 refers to the end face of the first reinforcing member 34 that is away from the frame. The front end face and the rear end face of the first reinforcing member 34 are located on opposite sides of the first reinforcing member 34 in the longitudinal direction Y. The inner side face of the second part 33 refers to the side of the second part 33 that is close to the upper crossbar 21 in the longitudinal direction Y.

[0055] For example, the first reinforcing member 34 in this disclosure may be a sheet metal extending in the longitudinal direction Y.

[0056] This disclosure enhances the overall structural strength of the column 3 by incorporating a first reinforcing member 34, thereby improving the impact resistance of the multi-functional rear protection 1. Furthermore, the first part 32 and the second part 33 can also enhance the stability of their connection with the upper crossbar 21 and the chassis through the first reinforcing member 34, thus ensuring that the multi-functional rear protection 1 effectively protects the chassis and tank.

[0057] In some embodiments, the column 3 may further include a second reinforcing member 35, the top surface of which is connected to the bottom surface of the first reinforcing member 34, the front end of which is connected to the rear end of the frame, and the rear end of which is connected to the inner side of the second portion 33. The lateral X-width of the second reinforcing member 35 is greater than that of the first reinforcing member 34, thereby enhancing the stability of the connection between the column 3 and the frame and the overall strength of the column 3 structure. In addition, the second reinforcing member 35 can also support the first reinforcing member 34 to reduce the risk of the first reinforcing member 34 detaching from the first portion 32, the second portion 33, the upper crossbar 21, and other structures. In this disclosure, the top surface of the second reinforcing member 35 refers to the side of the second reinforcing member 35 that is close to the first part 32, the front surface of the second reinforcing member 35 refers to the side of the second reinforcing member 35 that is away from the second part 33, the rear surface of the second reinforcing member 35 refers to the side of the second reinforcing member 35 that is far away from the upper crossbar 21 in the longitudinal Y direction, and the bottom surface of the first reinforcing member 34 refers to the side of the first reinforcing member 34 that is away from the first part 32.

[0058] For example, the second reinforcing member 35 in this disclosure may be made of sheet metal.

[0059] In some embodiments, the multifunctional rear protection 1 may further include a diagonal brace 36, the lower end of which abuts against the inner side of the bottom of the second portion 33, and the diagonal brace 36 extends obliquely upward toward the upper crossbar 21 so that its top end abuts against the bottom surface of the first reinforcing member 34. This disclosure provides the diagonal brace 36 to support the first reinforcing member 34 and the second reinforcing member 35, thereby enhancing the stability and structural strength of the overall structure of the multifunctional rear protection 1.

[0060] In some embodiments of this disclosure, a column 3 may be provided between the upper crossbar 21 and the lower crossbar 22 in the multifunctional rear protection 1. However, this is not the only possibility. In other embodiments of this disclosure, two or more columns 3 may be provided between the upper crossbar 21 and the lower crossbar 22 to strengthen the connection between the upper crossbar 21 and the lower crossbar 22 and to enhance the overall structural strength of the multifunctional rear protection 1, thereby improving its impact resistance and reducing the impact force on the tank on the chassis, thus improving transportation safety.

[0061] For example, when the multi-functional rear protection 1 is provided with two uprights 3, the two uprights 3 can be arranged symmetrically about the central axis of the frame to enhance the stability of the overall structure of the semi-trailer.

[0062] like Figure 2As shown, in some embodiments, a liquid collection device 4 can be provided between the two columns 3. The liquid collection device 4 is provided with an upward-opening liquid collection trough to collect the liquid medium (e.g., hazardous medium) leaking from the tank (e.g., dangerous goods tank container) during the unloading process when the tank on the frame opens the valve. This can reduce the loss of liquid medium while avoiding environmental pollution and harm to personnel.

[0063] For example, the opening of the liquid collection tank in this disclosure may be lower than the highest point of the first part 32, and the bottom of the liquid collection tank may not be lower than the lowest point of the second part 33, in order to reduce the risk of friction and collision between the bottom of the liquid collection component 4 and the external structure. The liquid collection tank in this disclosure may be opposite to the unloading valve of the tank on the semi-trailer, so as to accurately collect the liquid substances leaking from the tank. The side circumferential surface of the liquid collection component 4 near the upper crossbar 21 may be connected to the frame, and the side circumferential surface of the liquid collection component 4 near the column 3 may be spaced apart from the column 3. However, it is not limited to this; the side circumferential surface of the liquid collection component 4 near the column 3 may also abut against the column 3 to enhance the stability of the liquid collection component 4 installation.

[0064] In some embodiments, the liquid collection component 4 may be made of stainless steel to improve the problem of corrosion damage to the liquid collection component 4 by the liquid medium, thereby extending the service life of the liquid collection component 4 and reducing maintenance and replacement costs.

[0065] In addition, in some embodiments, the side surface of the liquid collection component 4 facing away from the upper crossbar 21 can be set to be inclined from top to bottom towards the upper crossbar 21, so as to increase the distance between the side surface of the liquid collection component 4 facing away from the upper crossbar 21 and the second part 33. When a rear-end collision occurs, the impact force of the rear vehicle on the liquid collection component 4 can be reduced, thereby reducing the risk of leakage of the liquid medium collected in the liquid collection component 4.

[0066] like Figure 3 As shown, in some embodiments, the multi-functional rear protection 1 may include a primary step 5, which is located between two pillars 3 and is disposed on the top surface of the lower crossbar 22 near the upper crossbar 21 in the vertical Z direction.

[0067] In this disclosure, the first-level step 5 can be welded to the top surface of the lower crossbar 22, but is not limited thereto. The first-level step 5 can also be detachably connected to the lower crossbar 22 using fasteners such as bolts. The first-level step 5 can be made of bent aluminum sheet to reduce the overall weight of the multi-functional rear protection 1 and ensure the aesthetic appearance of the overall design. When the multi-functional rear protection 1 is installed on the frame, the ground clearance of the first-level step 5 can be around 600mm to facilitate climbing.

[0068] The length of the first-level pedal 5 can be equal to the distance between the two uprights 3, thereby maximizing the treadable area of ​​the first-level pedal 5 for easy stepping. However, it is not limited to this; the length of the first-level pedal 5 can be less than the distance between the two uprights 3, depending on the actual situation.

[0069] Furthermore, in some embodiments, the upper surface of the primary pedal 5 may be provided with multiple anti-slip structures, which are arranged in an array with intervals between each other to enhance the anti-slip performance of the primary pedal 5 and reduce the risk of slipping when stepped on. In this disclosure, the anti-slip structure may be a protrusion connected to the upper surface of the primary pedal 5, but is not limited to this. The anti-slip structure may also be integrally formed with the primary pedal 5 through processes such as stamping and punching. The upper surface of the primary pedal 5 refers to the side of the primary pedal 5 that faces away from the lower crossbar 22.

[0070] In some embodiments, the multi-functional rear guard 1 may further include a secondary pedal 6 located above the lower crossbar 22. Specifically, the secondary pedal 6 may be located above the primary pedal 5. The secondary pedal 6 is located between the two uprights 3 and is connected to at least one side of the effluent accumulator 4 near the upright 3. This disclosure allows the top surface of the secondary pedal 6 to be flush with the opening of the effluent accumulator groove to facilitate the installation of the secondary pedal 6. One end face of the secondary pedal 6 near the upper crossbar 21 may be connected to the vehicle frame to enhance the stability of the installation of the secondary pedal 6. The secondary pedal 6 extends along the longitudinal direction Y. There may be two secondary pedals 6, with the two secondary pedals 6 positioned on opposite sides of the effluent accumulator groove. In addition, the length of the secondary pedal 6 in the longitudinal direction Y is less than the distance between the upper crossbar 21 and the lower crossbar 22 in the longitudinal direction Y.

[0071] For example, the length of the secondary step 6 in the longitudinal Y direction can be equal to the longitudinal Y distance between the upper crossbar 21 and the primary step 5, so that personnel can climb to the top of the frame by passing through the primary step 5 and the secondary step 6 in sequence, thereby facilitating the observation of the frame and tank.

[0072] It should be noted that the secondary pedal 6 in this disclosure can be integrally formed with the liquid collection component 4, but it is not limited to this. Alternatively, the secondary pedal 6 and the liquid collection component 4 can be formed separately first, and then the two can be connected. The secondary pedal 6 can be made by bending aluminum sheet to reduce the overall weight of the multi-functional rear protection 1 and ensure the aesthetic appearance of the overall design. When the multi-functional rear protection 1 is installed on the frame, the ground clearance of the secondary pedal 6 can be around 980mm to facilitate climbing.

[0073] Furthermore, in some embodiments, the upper surface of the secondary pedal 6 may be provided with multiple anti-slip structures, which are arranged in an array with intervals to enhance the anti-slip performance of the secondary pedal 6 and reduce the risk of slipping when stepped on. In this disclosure, the anti-slip structure may be a protrusion connected to the upper surface of the secondary pedal 6, but is not limited to this. The anti-slip structure may also be integrally formed with the secondary pedal 6 through processes such as stamping and punching. The upper surface of the secondary pedal 6 refers to the side of the secondary pedal 6 facing away from the lower crossbar 22. This disclosure provides a primary pedal 5 and a secondary pedal 6 to facilitate operators to access the unloading valve at the tail of the tank and handle splashed oil.

[0074] In some embodiments, a three-stage pedal 7 is also provided on the upper crossbar 21. The three-stage pedal 7 is connected to the side of the upper crossbar 21 near the column 3 and extends horizontally along the side away from the upper crossbar 21.

[0075] For example, the third-level step 7 can be installed at the right end of the upper crossbar 21, which corresponds to the right side of the semi-trailer. The third-level step 7 can be made of bent aluminum sheet to reduce the overall weight of the multi-functional rear protection 1 and ensure the aesthetic appearance. When the multi-functional rear protection 1 is installed on the frame, the ground clearance of the third-level step 7 can be around 1300mm to facilitate climbing.

[0076] The upper surface of the three-stage pedal 7 can be provided with multiple anti-slip structures, which are arranged in an array with intervals to enhance the anti-slip performance of the three-stage pedal 7 and reduce the risk of slipping when stepped on. In this disclosure, the anti-slip structure can be a raised structure connected to the upper surface of the three-stage pedal 7, but is not limited to this. The anti-slip structure can also be integrally formed with the three-stage pedal 7 through processes such as stamping and punching. The upper surface of the three-stage pedal 7 refers to the side of the three-stage pedal 7 that faces away from the lower crossbar 22. This disclosure provides a three-stage pedal 7 to facilitate operators climbing onto the frame and inspecting the tank.

[0077] In some embodiments, handrail holes 321 may be provided on the first part 32 of the two uprights 3, and the handrail holes 321 on the two uprights 3 are symmetrically arranged about the upper crossbar 21. When climbing up the top of the frame by passing through the first step 5 and the second step 6, people can insert their hands into the handrail holes 321 to reduce the risk of accidental slipping and thus improve the safety of the climbing process.

[0078] In some embodiments, the multifunctional rear guard 1 may further include an outer sealing plate 8, which is located between the two uprights 3 and its opposite ends in the transverse direction X are connected to the two uprights 3. The bottom surface of the outer sealing plate 8 abuts against the top surface of the lower crossbar 22, thereby ensuring that the outer sealing plate 8 is stably installed between the two uprights 3. The top surface of the outer sealing plate 8 is not higher than the top surface of the first part 32.

[0079] Specifically, the outer sealing plate 8 can be located between the first-level pedal 5 and the liquid sump, and abut against the first-level pedal 5 and the liquid sump. The top surface of the outer sealing plate 8 is not higher than the opening of the liquid sump, so that personnel can climb to the top of the frame through the first-level pedal 5 and the second-level pedal 6.

[0080] In some embodiments, the outer sealing plate 8 has an alignment through hole 81 that penetrates the outer sealing plate 8. The multifunctional rear protection 1 may also include a receiving frame 9 located between the two uprights 3. The receiving frame 9 includes a base plate 91 and a bent plate 92 arranged around the side circumference of the base plate 91, with the side of the bent plate 92 away from the base plate 91 connected to the inner side of the outer sealing plate 8. The inner side of the outer sealing plate 8 refers to the side of the outer sealing plate 8 closest to the liquid accumulation tank.

[0081] In this disclosure, the orthographic projection of the receiving frame 9 onto the outer sealing plate 8 covers the alignment through hole 81, and a receiving groove is formed between the outer sealing plate 8 and the receiving frame 9. The receiving groove can be used to place the license plate, and the license plate is recessed into the receiving groove, thereby reducing the possibility of oil splashing into the receiving groove and contaminating the license plate.

[0082] For example, such as Figures 4 to 5 As shown, the vertical Z-center line of the receiving frame 9 can coincide with the vertical Z-center line of the outer sealing plate 8. The distance between the two sides of the receiving frame 9 in the horizontal X direction and the corresponding side of the alignment through hole 81 can be 50mm. The distance between the bottom edge of the receiving frame 9 near the lower horizontal bar 22 and the corresponding side of the alignment through hole 81 can be 12mm. The longitudinal Y distance (i.e., the depth of the receiving groove) between the bottom plate 91 and the outer sealing plate 8 can be 64mm to ensure that the license plate can be completely recessed into the receiving groove, thereby reducing the situation where oil splashes into the receiving groove and contaminates the license plate.

[0083] In some embodiments, the present disclosure may provide a drainage hole on the bent plate 92 located at the bottom of the base plate 91, the drainage hole being disposed through the bent plate 92, thereby effectively improving the problem of water accumulation and rusting of license plates.

[0084] This disclosure also provides a semi-trailer, including a frame and a multi-functional rear guard 1, as described above, disposed at the rear of the frame. The multi-functional rear guard 1 is connected to the rear of the frame to reduce the impact force of the following vehicle on the frame in the event of a rear-end collision, preventing the following vehicle from directly colliding with the frame and the tank on the frame, thereby effectively protecting the following vehicle and the tank on the frame and improving the safety of semi-trailer transportation.

[0085] In the description of this specification, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0086] Furthermore, it should be noted that terms such as "upper," "lower," "left," and "right" are used only for distinction and convenience of description, and do not impose any positional limitations on the embodiments of the present invention. For example, "upper" in practice can refer to "lower," "left," or "right." In this disclosure, unless otherwise explicitly specified and limited, terms such as "assembly" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0087] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A multi-functional rear guard, located at the rear of the frame of a semi-trailer, characterized in that, include: An upper crossbar extends laterally and is located at the rear of the frame, with its top surface flush with the top surface of the frame. The lower crossbar extends laterally and is spaced below the upper crossbar; A column is connected between the upper crossbar and the lower crossbar, and the column extends downward at an angle from the first end to the last end, so that the lower crossbar extends beyond the upper crossbar at the last end.

2. The multifunctional rear protection according to claim 1, characterized in that, The column includes a first part and a second part that are connected to each other. The first part is connected to the upper crossbar and slopes downward from front to back. The second part is connected to the end of the first part that is away from the upper crossbar and extends in the vertical direction. The multi-functional rear protection includes two pillars, which are symmetrically arranged about the central axis of the frame.

3. The multifunctional rear protection according to claim 2, characterized in that, A liquid collection device is provided between the two columns. The liquid collection device has an upward-opening liquid collection trough. The opening of the liquid collection trough is lower than the highest end of the first part, and the bottom of the liquid collection trough is not lower than the lowest end of the second part. The liquid collection trough is used to be opposite to the unloading valve on the semi-trailer.

4. The multifunctional rear protection according to claim 2, characterized in that, The multi-functional rear protection includes a primary pedal, which is located on the top surface of the lower crossbar and between the two uprights.

5. The multifunctional rear protection according to claim 3, characterized in that, The multi-functional rear protection includes a secondary pedal located above the lower crossbar, the secondary pedal being located between the two columns and connected to at least one side of the liquid accumulation component near the column. The top surface of the secondary pedal is flush with the opening of the liquid accumulation tank.

6. The multifunctional rear protection according to claim 1, characterized in that, The upper crossbar is provided with a three-stage pedal, which is connected to the side of the upper crossbar near the column and extends horizontally along the side away from the upper crossbar.

7. The multifunctional rear protection according to claim 2, characterized in that, Both columns have handrail holes on the first part, and the handrail holes on the two columns are symmetrically arranged about the upper crossbar.

8. The multifunctional rear protection according to claim 2, characterized in that, The multi-functional rear protection includes: An outer sealing plate is located between the two columns, and its opposite ends in the horizontal direction are connected to the two columns. The bottom surface of the outer sealing plate abuts against the top surface of the lower crossbar, and the top surface of the outer sealing plate is not higher than the top surface of the first part. The outer sealing plate has an alignment through hole, which is provided through the outer sealing plate. A receiving frame is located between the two columns. The receiving frame includes a base plate and a bent plate arranged around the side of the base plate. The side of the bent plate away from the base plate is connected to the inner side of the outer sealing plate. The orthographic projection of the receiving frame on the outer sealing plate covers the alignment through hole. A receiving groove is formed between the outer sealing plate and the receiving frame. The bending plate located at the bottom of the base plate is provided with a water leakage hole, which is provided through the bending plate.

9. The multifunctional rear protection according to claim 2, characterized in that, The column includes a first reinforcing member, the top surface of which is connected to the bottom surface of the first part, the front end of which is connected to the upper crossbar, and the rear end of which is connected to the inner side surface of the second part.

10. The multifunctional rear protection according to claim 9, characterized in that, The upright includes a second reinforcing member, the top surface of which is connected to the bottom surface of the first reinforcing member, the front end of which is connected to the rear end of the frame, and the rear end of which is connected to the inner surface of the second portion; the lateral width of the second reinforcing member is greater than the lateral width of the first reinforcing member; and / or, The multifunctional rear protection includes a diagonal brace, the lower end of which abuts against the inner side of the bottom of the second part, the diagonal brace extending obliquely upward toward the upper crossbar, and its top end abutting against the bottom surface of the first reinforcing member.

11. A semi-trailer, characterized in that, Includes a frame and a multi-functional rear guard as described in any one of claims 1 to 10, located at the rear of the frame.

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