A modular bumper frame structure and bumper assembly

Abstract

The present invention relates to a modular bumper frame structure and a bumper assembly, which includes: a middle protection frame; a first step frame, wherein the first step frame is fixed to two lamp frames of the middle protection frame, and in the width direction of the vehicle body, the two lamp frames are spaced and distributed on both sides of the middle protection frame and fixed to the middle protection frame; a lower protection frame, wherein in the height direction of the vehicle body, the lower protection frame is fixed to the bottom of the two lamp frames. The present invention adopts a left, middle and right three-section design for the bumper frame structure, that is, a multi-section design, so that each part under the bumper frame structure is easy to replace modularly, and the parts have a good universality rate. When the local parts of the bumper frame are damaged, it is convenient to replace and maintain, and the maintenance cost is low; at the same time, the first step frame can be designed differently to ensure that the frame structure of the non-step area can be universalized, and the welding structure of the traditional bumper frame structure is eliminated.

Description

Technical Field

[0001] The invention relates to the field of automobiles, and in particular to a modular bumper frame structure and a bumper assembly. Background Art

[0002] The car bumper is a safety device that absorbs and mitigates external impact and protects the front and rear parts of the car body. It is located in most areas of the front and rear of the car and is designed to prevent the impact of external damage to the vehicle on the vehicle safety system. They have the ability to reduce injuries to drivers and passengers in high-speed collisions. Now more and more are designed for human protection. The front bumper frame of the car is generally hidden inside the bumper and the inside of the door. It absorbs the impact energy under a large impact force and reduces damage to passengers in the car.

[0003] However, the parts commonality of the bumper frame in the related art is poor. When a local part of the bumper frame is damaged, it cannot be replaced and maintained, and the maintenance cost is high. Summary of the invention

[0004] The embodiments of the present invention provide a modular bumper frame structure and a bumper assembly to solve the problems in the related art that the bumper frame has a low parts commonality rate and cannot be replaced and maintained when local parts of the bumper frame are damaged, resulting in high maintenance costs.

[0005] In the first aspect, a modular bumper frame structure is provided, which includes: a middle protection frame; a first step frame, which is fixed to two lamp frames of the middle protection frame, and in the width direction of the vehicle body, the two lamp frames are spaced apart and distributed on both sides of the middle protection frame and fixed to the middle protection frame; a lower protection frame, which is fixed to the bottom of the two lamp frames in the height direction of the vehicle body.

[0006] In some embodiments, the middle protection frame includes: an upper bracket, both ends of which are fixed with a first connecting member, and each of the first connecting members is respectively fixed to one of the lamp frames; a middle bracket, and the middle bracket is fixed between two of the lamp frames; a lower bracket, both ends of which are fixed with a second connecting member, and each of the second connecting members is respectively fixed to one of the lamp frames; the lower protection frame includes: an anti-collision bar; two fixing seats, one of the fixing seats is fixed to one end of the two lamp frames close to each other, and both of the fixing seats are fixed to the anti-collision bar; two third connecting members, one of the third connecting members is fixed to both ends of the anti-collision bar, and the two third connecting members are respectively fixed to the lamp frames above them.

[0007] In some embodiments, the first step frame includes: a first step board, which is rotatably mounted on the two first connecting members; when the first step board is in a vertical state, the first step board blocks the gap between the upper bracket and the middle bracket; when the first step frame is in a horizontal state, the gap between the upper bracket and the middle bracket is exposed; in the width direction of the vehicle body, a plurality of connecting rods 1 are fixed on the middle bracket at intervals, each of the connecting rods 1 is vertically arranged, one end of each of the connecting rods 1 is located between the upper bracket and the middle bracket, and the other end thereof is located between the middle bracket and the lower bracket.

[0008] In some embodiments, the first step frame includes: two first step plates, which are spaced apart in the width direction of the vehicle body and are rotatably mounted on the middle bracket; two connecting rods 2 are fixed to the middle bracket in the width direction of the vehicle body, each of the connecting rods 2 is T-shaped, the wide end of each connecting rod 2 is fixed between the middle bracket and the upper bracket, and the narrow ends of the two connecting rods 2 are opposite to each other; in the width direction of the vehicle body, a plurality of connecting rods 3 are spaced apart and fixed to the middle bracket, each of the connecting rods 3 is vertically arranged and located between the middle bracket and the lower bracket.

[0009] In some embodiments, the modular bumper frame structure further includes: a second step frame, wherein the second step frame is connected to the lower bracket.

[0010] In some embodiments, the second step frame includes: a second step board, and the second step board is rotatably mounted on the two second connecting members.

[0011] In some embodiments, the second step skeleton includes: two second step plates, which are spaced apart in the width direction of the vehicle body and are both rotatably mounted on the lower bracket.

[0012] In some embodiments, the modular bumper frame structure also includes: two first connecting brackets, the two first connecting brackets correspond one-to-one to the two lamp frames and are fixed to the corresponding lamp frames, the two first connecting brackets are vertically arranged, and the lower ends thereof are fixed to the lower protection frame; the two first connecting brackets are respectively used to reduce the shaking of the upper and lower ends of the bumper.

[0013] In some embodiments, the modular bumper skeleton structure also includes: two second connecting brackets, the two second connecting brackets correspond one-to-one to the two lamp skeletons and are fixed to the corresponding lamp skeletons; in the direction of vehicle body width and vehicle body height, each second connecting bracket is extended toward the outside of the vehicle body and bent upward, and each second connecting bracket is roughly S-shaped; the two second connecting brackets are respectively used to reduce the shaking of the left and right ends of the bumper.

[0014] In a second aspect, a bumper assembly is provided, comprising the modular bumper skeleton structure described above; and further comprising: an outer panel, wherein the outer panel is mounted on the modular bumper skeleton structure.

[0015] The beneficial effects brought about by the technical solution provided by the present invention include: the bumper frame structure adopts a three-section design of left, middle and right, that is, a multi-section design, so that each part under the bumper frame structure can be easily disassembled and assembled, convenient for modular replacement, and has a good parts commonality rate. When local parts of the bumper frame are damaged, it is convenient to replace and maintain, and the maintenance cost is low; at the same time, the first step frame on the middle protection frame can be designed with differentiation to ensure that the frame structure of the non-step area can be universal, thereby eliminating the welding structure of the traditional bumper frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic front view of the structure of a first modular bumper framework structure provided by an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of a first modular bumper framework structure provided by an embodiment of the present invention;

[0019] Figure 3 An exploded three-dimensional structural schematic diagram of a first modular bumper framework structure provided by an embodiment of the present invention;

[0020] Figure 4 A front structural schematic diagram of a second modular bumper framework structure provided by an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of a second modular bumper framework structure provided by an embodiment of the present invention;

[0022] Figure 6 An exploded three-dimensional structural schematic diagram of a second modular bumper framework structure provided in an embodiment of the present invention.

[0023] In the figure: 1. middle protection frame; 11. upper bracket; 111. first connecting piece; 12. middle bracket; 121. connecting rod one; 122. connecting rod two; 123. connecting rod three; 13. lower bracket; 131. second connecting piece; 2. first step frame; 21. first step board; 3. lamp frame; 4. lower protection frame; 41. anti-collision rod; 42. fixing seat; 43. third connecting piece; 5. second step frame; 51. second step board; 6. first connecting bracket; 7. second connecting bracket. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The embodiments of the present invention provide a modular bumper frame structure and a bumper assembly to solve the problems in the related art that the parts commonality of the bumper frame is poor, when local parts of the bumper frame are damaged, they cannot be replaced and maintained, and the maintenance cost is high.

[0026] See also Figure 1 As shown, an embodiment of the present invention provides a modular bumper frame structure, which may include: a middle protection frame 1, wherein the middle protection frame 1 is mainly used to protect against collisions in front of the vehicle body; a first step frame 2, wherein the first step frame 2 is fixed to the middle protection frame 1, wherein the first step frame 2, on the one hand, is convenient for people to step on it to perform maintenance and repairs on the vehicle body, and on the other hand, on the basis of the middle protection frame 1, further enhances the structural strength of the middle protection frame 1 and improves its collision performance; two lamp frames 3, in the width direction of the vehicle body, the two lamp frames 3 are spaced apart on both sides of the middle protection frame 1 and are fixed to the middle protection frame 1, wherein the lamp frames 3 are mainly used to protect the lamps behind them, and protect against front and side collisions, such as Figure 1As shown, the lamp frame 3 is integrally formed by a stamping process, and its manufacturing cost is low. It can provide a good crush energy absorption effect when facing a frontal or side impact; the lower protection frame 4 is fixed to the bottom of the two lamp frames 3 in the height direction of the vehicle body, wherein the lower protection frame 4 enhances the connection strength of the two lamp frames 3, and together form an integral bumper frame structure, and at the same time, can play a good anti-collision effect when facing a collision from the front and bottom.

[0027] Specifically, the bumper frame structure adopts a three-section design of left, middle and right, that is, a multi-section design, so that the middle protection frame 1, the first step frame 2, the lamp frame 3 and the lower protection frame 4 under the bumper frame structure can be easily disassembled and assembled, convenient for modular replacement, and have a good parts commonality. When local parts of the bumper frame structure are damaged, it is convenient to replace and maintain them, and the maintenance cost is low; at the same time, the first step frame 2 on the middle protection frame 1 can be designed with differentiation to ensure that the frame structure of the non-step area can be universal, thereby eliminating the welding structure of the traditional bumper frame structure.

[0028] In some embodiments, Figure 2 , Figure 3As shown, the middle protection frame 1 may include: an upper bracket 11, both ends of the upper bracket 11 are fixed with first connecting members 111, each of the first connecting members 111 is fixed to one of the lamp frames 3, wherein the upper bracket 11 can be a rod-shaped sheet metal part, which mainly plays a protective role against the impact from the front and upper part of the car, and the first connecting member 111 can be a sheet metal part, which is convenient for installation and fixation with the middle and upper part of the corresponding lamp frame 3; a middle bracket 12, the middle bracket 12 is fixed between the two lamp frames 3, wherein the middle bracket 12 can be a rod-shaped sheet metal part, and the middle bracket 12 is installed and fixed to the middle parts of the two lamp frames 3, mainly to withstand the impact of the middle part of the middle protection frame 1; a lower bracket 13, both ends of the lower bracket 13 are fixed with second connecting members 131, each of the second connecting members 131 is fixed to one of the lamp frames 3, wherein the lower bracket 13 can be a rod-shaped sheet metal part, which withstands the impact of the lower part of the middle protection frame 1 The second connecting member 131 can be a sheet metal member in the form of a sheet, and the second connecting member 131 is mainly used to connect and fix the lower ends of the two lamp frames 3; the lower protection frame 4 can include: an anti-collision bar 41; two fixing seats 42, each of the two lamp frames 3 close to each other is fixed with a fixing seat 42, and the two fixing seats 42 are fixed to the anti-collision bar 41, wherein the two fixing seats 42 can be fixed to the corresponding lamp frames 3 along the width direction of the vehicle body by bolts; two third connecting members 43, each of the two ends of the anti-collision bar 41 is fixed with a third connecting member 43, and the two third connecting members 43 are respectively fixed to the lamp frames 3 above them, wherein the two third connecting members 43 can be fixed to the corresponding lamp frames 3 along the length direction of the vehicle body by bolts, so as to realize the firm connection between the anti-collision bar 41 and the two lamp frames 3 from two vertical directions, thereby ensuring the connection strength and anti-collision strength of the overall anti-collision bar frame structure.

[0029] In some embodiments, Figure 2 , Figure 3 As shown, the first step frame 2 may include: a first step board 21, the first step board 21 is rotatably mounted on the two first connecting members 111, wherein the left end of the first step board 21 is rotatably mounted with the first connecting member 111 at the left end, and the right end of the first step board 21 is rotatably mounted with the first connecting member 111 at the right end; wherein the first connecting member 111, on the one hand, facilitates the upper bracket 11 to be fixed between the two lamp frames 3, and on the other hand, provides an installation position for the installation of the first step board 21, and fixes the first step board 21 in the middle of the two lamp frames 3, further enhancing the anti-collision performance of the middle and upper part of the middle protection frame 1.

[0030] When the first step board 21 is in a vertical state, the first step board 21 blocks the gap between the upper bracket 11 and the middle bracket 12, wherein when the first step board 21 is in a vertical state, the gap between the upper bracket 11 and the middle bracket 12 is blocked to protect the components behind them and prevent them from being damaged by collision; when the first step frame 2 is in a horizontal state, the gap between the upper bracket 11 and the middle bracket 12 is exposed, wherein when maintenance and inspection of the vehicle body is required, the first step frame 2 can provide a good supporting position for the staff to step on for maintenance of the front enclosure; in the width direction of the vehicle body, a plurality of connecting rods 121 are fixed at intervals on the middle bracket 12, each of the connecting rods 121 is vertically arranged, one end of each connecting rod 121 is located between the upper bracket 11 and the middle bracket 12, and the other end thereof is located between the middle bracket 12 and the lower bracket 13. Among them, the connecting rod 121 can provide installation support points for the outer plate at the gap between the upper bracket 11 and the middle bracket 12, and the grille at the gap between the middle bracket 12 and the lower bracket 13, so as to improve the rigidity.

[0031] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, the first step skeleton 2 may include: two first step plates 21, in the width direction of the vehicle body, the two first step plates 21 are arranged at intervals, and are both rotatably mounted on the middle bracket 12, one of the first step plates 21 is rotatably mounted on the left end of the middle bracket 12, and the other first step plate 21 is rotatably mounted on the right end of the middle bracket 12; in the width direction of the vehicle body, two connecting rods 122 are fixed to the middle bracket 12, each of the connecting rods 122 is arranged in a T shape, the wide end of each of the connecting rods 122 is fixed between the middle bracket 12 and the upper bracket 11, and the narrow ends of the two connecting rods 122 are arranged opposite to each other, wherein, as shown Figure 4 As shown, the wide end of the connecting rod 122 refers to a vertical section, and the narrow end refers to a horizontal section; the connecting rod 122 can firstly improve the connection strength between the upper bracket 11 and the middle bracket 12, and secondly, the horizontal section can provide a mounting support point for the outer panel at the gap between the upper bracket 11 and the middle bracket 12; in the width direction of the vehicle body, a plurality of connecting rods 3 123 are fixed at intervals on the middle bracket 12, and each of the connecting rods 3 123 is vertically arranged and located between the middle bracket 12 and the lower bracket 13, wherein the connecting rods 3 123 provide mounting support points for the grilles at the middle bracket 12 and the lower bracket 13, and improve the structural strength there.

[0032] In some embodiments, Figure 1-6As shown, the modular bumper frame structure may further include: a second step frame 5, which is connected to the lower bracket 13. The second step frame 5 realizes a secondary step structure based on the first step frame 2, which is more convenient for workers to step on for maintenance and repair. At the same time, the second step frame 5 can improve the structural strength of the lower part of the middle protection frame 1 and improve its collision performance.

[0033] In some embodiments, Figure 1 , 2 As shown in Figure 3, the second step skeleton 5 may include: a second step board 51, which is rotatably mounted on the two second connecting members 131. The left end of the second step board 51 is rotatably mounted on the second connecting member 131 at the left end, and the right end of the second step board 51 is rotatably mounted on the second connecting member 131 at the right end. When the second step board 51 is in a vertical state, it blocks the gap between the middle bracket 12 and the lower bracket 13, provides protection for the components behind the gap, and improves its anti-collision performance. When it is in a horizontal state, it provides a foot support point for the staff to carry out maintenance, which is convenient for maintenance and repair.

[0034] In some optional embodiments, such as Figure 4 , 5 As shown in FIG. 6 , the second step skeleton 5 may include: a second step board 51, which is fixedly mounted on the lower bracket 13. Specifically, the cross section of the second step board 51 is roughly a right-angle structure, the two inner side walls of the second step board 51 match the lower bracket 13, and are mounted on the front side wall and the upper side wall of the lower bracket 13, and the top of the second step board 51 is a stepping area. Specifically, the second step board 51 has a simpler structure and a lower manufacturing cost. On the one hand, it is better to be closely mounted with the lower bracket 13 to improve the structural strength and structural rigidity of the lower bracket 13, and on the other hand, it can also provide a good stepping area.

[0035] In some embodiments, the second step skeleton 5 may include: two second step plates 51, which are arranged at intervals in the width direction of the vehicle body and are both rotatably mounted on the lower bracket 13. Among them, the two second step plates 51 can be arranged as two separately spaced flip pedals like the first step plate 21, which reduces the use of materials and saves the cost of manufacturing on the one hand, and is more convenient for the staff to open the required steps according to their own needs on the other hand, such as opening two diagonally arranged step plates, i.e., the second step plate 51 at the lower left and the first step plate 21 at the upper right, to form a step structure, which is more convenient for the staff to climb onto the top of the anti-collision bar skeleton structure, so as to facilitate maintenance and repair. Finally, the step plates are arranged as four separate partially flipped ones, which can greatly improve the structural strength of the upper gap and the lower gap of the middle protection skeleton 1, greatly improve the structural performance and anti-collision performance of the modular anti-collision bar skeleton structure, and better protect the components behind it.

[0036] In some embodiments, Figure 1-6 As shown, the modular bumper frame structure may also include: two first connecting brackets 6, the two first connecting brackets 6 correspond to the two lamp frames 3 one by one, and are fixed to the corresponding lamp frames 3, the two first connecting brackets 6 are arranged vertically, and their lower ends are fixed to the lower protection frame 4; the two first connecting brackets 6 are used to reduce the shaking of the upper and lower ends of the bumper. Among them, the two first connecting brackets 6 can adopt a stamping process, which has good structural performance and low processing cost, and improves the structural strength of the lamp frame 3 thereon. At the same time, the lower ends of the first connecting brackets 6 are fixed to the third connecting piece 43 of the lower protection frame 4. On the basis of being connected and fixed to the lamp frame 3, they are also connected and fixed to the lower protection frame 4, so as to improve the stability and reliability of the connection and fixation. In the up and down direction, the first connecting bracket 6 improves the connection strength at the upper and lower ends of the lamp frame 3, reduces the shaking of the upper and lower ends of the lamp frame 3 at idle speed, and at the lower end of the first connecting bracket 6, the shaking can be transmitted to the anti-collision bar 41 of the lower protection frame 4 for consumption.

[0037] In some embodiments, Figure 1-6As shown, the modular bumper frame structure may also include: two second connecting brackets 7, the two second connecting brackets 7 correspond to the two lamp frames 3 one by one, and are fixed to the corresponding lamp frames 3; in the width and height directions of the vehicle body, each second connecting bracket 7 is bent and extended toward the outside of the vehicle body and upward, and each second connecting bracket 7 is roughly S-shaped; the two second connecting brackets 7 are respectively used to reduce the shaking of the left and right ends of the bumper. Among them, the second connecting bracket 7 is roughly S-shaped, and can extend on the walking path of the lamp frame 3, in the up and down directions, improve the structural strength of the lamp frame 3, improve its side and front collision performance, and can reduce the idle shaking at the left and right ends of the lamp frame 3.

[0038] Specifically, the upper end of the second connecting bracket 7 and the upper end of the first connecting bracket 6 on the same side are coaxially fixed to the lamp frame 3 with bolts, so that the first connecting bracket 6 and the second connecting bracket 7 form a whole, thereby realizing the shaking of the upper left end of the lamp frame 3 on the left side, and transmitting and dispersing it to the lower right through the first connecting bracket 6 and the second connecting bracket 7, thereby greatly improving the overall stability of the lamp frame 3 on the left side. The same is true for the lamp frame 3 on the right side, thereby greatly improving the driving comfort of the driver.

[0039] In some optional embodiments, the second connecting bracket 7 can adopt a tubular design, which can improve the crushing energy absorption effect while reducing its own spatial volume; of course, the second connecting bracket 7 can also adopt a stamping process like the first connecting bracket 6 to improve the structural strength on the basis of expanding its cross-section.

[0040] In some embodiments, the embodiments of the present invention may also provide a bumper assembly, which may include the modular bumper skeleton structure described in some of the above embodiments; and may also include: an outer panel, wherein the outer panel is installed on the modular bumper skeleton structure.

[0041] In some embodiments, the present invention may also provide a vehicle, on which a bumper assembly described in the above embodiments is installed.

[0042] Specifically, the bumper frame structure of the vehicle adopts a three-section design of left, middle and right, that is, a multi-section design, to achieve a modular design, so that each part under the bumper frame structure can be easily disassembled and assembled, convenient for modular replacement, and has a good parts commonality rate. When local parts of the bumper frame are damaged, it is convenient to replace and maintain, and the maintenance cost is low; at the same time, the first step frame 2 on the middle protection frame 1 can be designed with differentiation to ensure that the frame structure of the non-step area can be universal, and the welding structure of the traditional bumper frame structure is eliminated.

[0043] Among them, Figure 1 , 2As shown in 3, the driver can choose a bumper assembly with a two-stage step structure that can be flipped; further, one of the first step frame 2 and the second step frame 5 can be designed as two treads with independently flippable structures, or both can be designed as treads with independently flippable structures.

[0044] Among them, Figure 4 , 5 As shown in FIG. 6 , a bumper assembly having a fixed lower portion and a step-reversible structure at the upper portion can also be selected. Furthermore, the upper portion can also be designed as two step plates with separate reversible structures.

[0045] Furthermore, a bumper assembly with a lower portion having a reversible step structure and an upper portion having a fixed structure can be selected. Similarly, the lower portion can be designed as two independently reversible step plates.

[0046] In summary, the embodiments of the present invention realize that the step structure on the bumper assembly can be designed differently without improving the non-step area, ensuring that the skeleton structure of the non-step area can be universal while meeting the driver's selection requirements for the step area.

[0047] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0048] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0049] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A modular bumper frame structure, characterized in that: It includes: Central protective frame (1); A first step frame (2), wherein the first step frame (2) is fixed to the middle protection frame (1); Two lamp frames (3), which are spaced apart and distributed on both sides of the middle protection frame (1) in the width direction of the vehicle body and are fixed to the middle protection frame (1); A lower protection frame (4), in the vehicle body height direction, the lower protection frame (4) is fixed to the bottom of the two lamp frames (3); The middle protection frame (1) comprises: An upper bracket (11), wherein both ends of the upper bracket (11) are fixed with first connecting members (111), and each of the first connecting members (111) is respectively fixed to one of the lamp frames (3); A middle bracket (12), wherein the middle bracket (12) is fixed between the two lamp frames (3); A lower bracket (13), wherein both ends of the lower bracket (13) are fixed with second connecting members (131), and each of the second connecting members (131) is respectively fixed to one of the lamp frames (3); The lower protection frame (4) comprises: Anti-collision bar (41); Two fixing seats (42), one of the fixing seats (42) being fixed to each end of the two lamp frames (3) close to each other, and both the fixing seats (42) are fixed to the anti-collision rod (41); Two third connecting members (43), one third connecting member (43) is fixed to each end of the anti-collision rod (41), and the two third connecting members (43) are respectively fixed to the lamp frame (3) above them.

2. The modular bumper frame structure according to claim 1, characterized in that: The first step frame (2) comprises: A first stepping plate (21), wherein the first stepping plate (21) is rotatably mounted on two first connecting members (111); When the first step board (21) is in a vertical state, the first step board (21) blocks the gap between the upper bracket (11) and the middle bracket (12); when the first step frame (2) is in a horizontal state, the gap between the upper bracket (11) and the middle bracket (12) is exposed; In the width direction of the vehicle body, a plurality of connecting rods (121) are fixed at intervals on the middle bracket (12), each of the connecting rods (121) is vertically arranged, one end of each of the connecting rods (121) is located between the upper bracket (11) and the middle bracket (12), and the other end is located between the middle bracket (12) and the lower bracket (13).

3. The modular bumper frame structure according to claim 1, characterized in that: The first step frame (2) comprises: Two first step plates (21), which are arranged at intervals in the width direction of the vehicle body and are both rotatably mounted on the middle bracket (12); In the width direction of the vehicle body, two connecting rods (122) are fixed on the middle bracket (12), each of the connecting rods (122) is arranged in a T-shape, the wide end of each connecting rod (122) is fixed between the middle bracket (12) and the upper bracket (11), and the narrow ends of the two connecting rods (122) are arranged opposite to each other; In the width direction of the vehicle body, a plurality of connection rods (123) are fixed at intervals on the middle bracket (12), and each of the connection rods (123) is arranged vertically and is located between the middle bracket (12) and the lower bracket (13).

4. The modular bumper framework structure according to any one of claims 1 to 3, characterized in that: The modular bumper framework structure further comprises: A second step frame (5), wherein the second step frame (5) is connected to the lower bracket (13).

5. The modular bumper framework structure according to claim 4, characterized in that: The second step frame (5) comprises: A second stepping plate (51), wherein the second stepping plate (51) is rotatably mounted on the two second connecting members (131).

6. The modular bumper frame structure according to claim 4, characterized in that: The second step frame (5) comprises: Two second step plates (51) are arranged at intervals in the width direction of the vehicle body and are both rotatably mounted on the lower bracket (13).

7. The modular bumper framework structure according to claim 1, characterized in that: The modular bumper framework structure further comprises: Two first connecting brackets (6), the two first connecting brackets (6) corresponding to the two lamp frames (3) one by one and fixed to the corresponding lamp frames (3), the two first connecting brackets (6) being arranged vertically, and the lower ends of the two first connecting brackets (6) being fixed to the lower protective frame (4); The two first connecting brackets (6) are respectively used to reduce the vibration of the upper and lower ends of the bumper.

8. The modular bumper framework structure according to claim 1, characterized in that: The modular bumper framework structure further comprises: Two second connecting brackets (7), the two second connecting brackets (7) corresponding to the two lamp frames (3) one by one, and fixed to the corresponding lamp frames (3); In the vehicle body width and vehicle body height directions, each of the second connecting brackets (7) is bent and extended toward the outside of the vehicle body and upward, and each of the second connecting brackets (7) is substantially S-shaped; The two second connecting brackets (7) are respectively used to reduce the vibration of the left and right ends of the bumper.

9. A bumper assembly, characterized in that: Comprising a modular bumper framework structure as claimed in any one of claims 1 to 8; Also includes: An outer panel is mounted on the modular bumper framework structure.

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