Cab rear wall connector structure, cab rear wall and commercial vehicle

Abstract

The invention relates to a cab rear wall connector structure, a cab rear wall and a commercial vehicle, and relates to the technical field of vehicle body structural design, the cab rear wall connector structure comprises a rear wall connector body, the rear wall connector body is used for being arranged at the joint of a cross beam and a longitudinal beam in a beam assembly, the rear wall connector body comprises a bottom plate and a vertical plate which are connected with each other, and the vertical plate is used for being connected with a web of the longitudinal beam; the bottom plate and the cross beam are arranged in a spaced mode, the vertical plate is provided with crumple energy absorption holes partially extending to the bottom plate, and when the cab is subjected to top pressure, the connecting position of the cross beam and the longitudinal beam is bent, crumples under stress and absorbs top pressure energy. Due to the fact that the crumple energy absorption holes are formed in the cab rear wall connector structure, the structural strength of the crumple energy absorption holes is smaller than that of other parts of a beam assembly, when a cab is jacked, deformation, stress crumple and jacking energy absorption occur at the installation position of the cab rear wall connector structure, the connecting position of the cross beam and the longitudinal beam is bent during crumple, and the bottom plate abuts against the cross beam. And the top pressure energy is further absorbed.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle body structure design, and in particular to a cab rear enclosure joint structure, a cab rear enclosure and a commercial vehicle. Background Art

[0002] Commercial vehicles are cars that are designed and technically characterized to transport people and goods. Commercial vehicles include all trucks and buses with more than 9 seats, and are divided into five categories: buses, trucks, semi-trailer tractors, incomplete buses, and incomplete trucks. In the entire industry media, the concept of commercial vehicles is mainly defined based on their own different uses, and commercial vehicles are usually divided into two categories: buses and trucks. The cab structure of commercial vehicles is different from that of ordinary vehicles. Most commercial vehicles use an integral rear outer panel and an integral rear frame solution, and the structure is simple. When the vehicle body is subjected to a strong impact, the rear system is prone to deformation, threatening the safety of the driving members.

[0003] As safety requirements increase, the top pressure standards in the safety regulations that commercial vehicles need to meet are becoming more and more stringent. After the cab is hit from the side, the top will be under a certain tonnage of pressure. After the cab is deformed under force, it is necessary to ensure that the occupants have enough survival space.

[0004] In the prior art, the rear enclosure structure generally directly adopts a rigid structure, which is directly subjected to force through a support structure and transmits force from the top to the bottom.

[0005] However, the top pressure is transmitted directly from the beam, and the deformation area is often at the floor or the middle part, which can easily damage the occupants' living space, causing possible personal injury to the occupants and reducing safety. Summary of the invention

[0006] The present application provides a cab rear panel joint structure, a cab rear panel and a commercial vehicle, which can solve the problem in the prior art that the top pressure is directly transmitted from the beam, the deformation area is often at the floor or the middle part, which can easily damage the living space of the occupants, may cause personal injury to the occupants, and reduce safety.

[0007] In a first aspect, an embodiment of the present application provides a cab rear panel joint structure, which includes:

[0008] The rear enclosure joint body is used to be arranged at the connection between the cross beam and the longitudinal beam in the beam assembly. The rear enclosure joint body includes a bottom plate and a vertical plate that are connected to each other. The vertical plate is used to be connected to the web plate of the longitudinal beam, and the bottom plate is used to be spaced apart from the cross beam. The vertical plate is provided with a crush energy absorption hole that partially extends to the bottom plate. When the cab is subjected to top pressure, the connection between the cross beam and the longitudinal beam bends and collapses under force to absorb the top pressure energy.

[0009] In one embodiment, the two ends of the bottom plate are provided with first flanges extending upward, and the two sides of the vertical plate are provided with second flanges extending toward the side close to the bottom plate, the second flanges are correspondingly connected to the first flanges, and the bottom plate, the first flange, the vertical plate and the second flanges form a crush energy absorption zone located on both sides of the crush energy absorption hole.

[0010] In one embodiment, the overlapping portion of the second flange and the first flange is used to connect to the wing plate of the longitudinal beam, and the upper portion of the vertical plate is used to connect to the web plate of the longitudinal beam.

[0011] In one embodiment, the second flange is located on the inner side of the first flange, and the outer side of the first flange is used to connect with the wing plate of the longitudinal beam.

[0012] In one embodiment, the connections between the bottom plate and the vertical plate, between the bottom plate and the first flange, and between the vertical plate and the second flange are all provided with rounded corners.

[0013] In one embodiment, the crush energy absorption zone extends to the rounded corners where the bottom plate and the vertical plate, the bottom plate and the first flange, and the vertical plate and the second flange are connected.

[0014] In one embodiment, the width of the crush energy absorbing hole extending to the upper portion of the bottom plate is less than or equal to one third of the width of the bottom plate.

[0015] In one embodiment, a distance between an upper end of the crush energy absorbing hole and an upper side of the vertical plate is smaller than a width of the crush energy absorbing hole.

[0016] In a second aspect, the embodiment of the present application further provides a cab rear enclosure, which includes:

[0017] A beam assembly, comprising a cross beam and a longitudinal beam connected to the cross beam;

[0018] The rear enclosure joint body is used to be arranged at the connection between the cross beam and the longitudinal beam in the beam assembly. The rear enclosure joint body includes a bottom plate and a vertical plate that are connected to each other. The vertical plate is used to be connected to the web plate of the longitudinal beam, and the bottom plate is used to be spaced apart from the cross beam. The vertical plate is provided with a crush energy absorption hole that partially extends to the bottom plate. When the cab is subjected to top pressure, the connection between the cross beam and the longitudinal beam bends and collapses under force to absorb the top pressure energy.

[0019] In a third aspect, an embodiment of the present application further provides a commercial vehicle, which includes the above-mentioned cab rear panel joint structure.

[0020] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0021] When the cab rear enclosure joint structure is used, the rear enclosure joint body is arranged at the connection between the cross beam and the longitudinal beam in the beam assembly, and the rear enclosure joint body includes a bottom plate and a vertical plate connected to each other, the vertical plate is used to connect with the web plate of the longitudinal beam, the bottom plate is used to be arranged with the cross beam at intervals, and the vertical plate is provided with a part of the crushing energy absorbing hole extending to the bottom plate, when the cab is subjected to top pressure, the connection between the cross beam and the longitudinal beam is bent, and the force is crushed to absorb the top pressure energy. Since the crushing energy absorbing hole is provided in the cab rear enclosure joint structure, the structural strength is less than the structural strength of other parts of the beam assembly, when the cab is subjected to top pressure, the cab rear enclosure joint structure is deformed from the installation position, the force is crushed, and the top pressure energy is absorbed, when the cab is subjected to top pressure, the connection between the cross beam and the longitudinal beam is bent, and the bottom plate abuts against the cross beam to further absorb the top pressure energy, which solves the problem that the top pressure in the prior art is directly transmitted from the beam, and the deformation area is often at the floor or the middle part, which is easy to damage the living space of the occupants, and there is a possibility of causing personal injury to the occupants and reducing safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 The present invention is a schematic structural diagram of a cab rear enclosure joint structure embodiment of the present invention.

[0024] Figure 2 The present invention is a schematic structural diagram of a rear enclosure of a cab.

[0025] Figure 3 It is a schematic structural diagram of a beam assembly in an embodiment of a cab rear enclosure of the present invention.

[0026] Figure 4 The present invention is a schematic diagram of the structure of the connection between the cross beam and the longitudinal beam in an embodiment of the rear enclosure of a cab.

[0027] Figure 5 The present invention is a schematic diagram of the cross-sectional structure of the connection between the cross beam and the longitudinal beam in an embodiment of the rear enclosure of a cab.

[0028] In the figure: 1. rear enclosure joint body; 11. bottom plate; 111. first flange; 12. vertical plate; 121. second flange; 2. beam assembly; 21. cross beam; 22. longitudinal beam; 3. crush energy absorption hole; 4. crush energy absorption zone; 5. fillet; 6. energy absorption zone. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The embodiments of the present application provide a cab rear panel joint structure, a cab rear panel and a commercial vehicle, which can solve the problem in the prior art that the top pressure is directly transmitted from the beam, the deformation area is often at the floor or the middle part, which can easily damage the living space of the occupants, may cause personal injury to the occupants, and reduce safety.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, on the one hand, the present application provides a cab rear wall joint structure, which includes:

[0032] The rear enclosure joint body 1 is used to be arranged at the connection between the cross beam 21 and the longitudinal beam 22 in the beam assembly 2. The rear enclosure joint body 1 includes a bottom plate 11 and a vertical plate 12 which are connected to each other. The vertical plate 12 is used to be connected to the web of the longitudinal beam 22. The bottom plate 11 is used to be spaced apart from the cross beam 21. The vertical plate 12 is provided with a crush energy absorbing hole 3 which partially extends to the bottom plate 11. When the cab is subjected to top pressure, the connection between the cross beam 21 and the longitudinal beam 22 bends and is crushed under force to absorb the top pressure energy.

[0033] When the cab rear panel joint structure is used, the rear panel joint body 1 is arranged at the connection between the cross beam 21 and the longitudinal beam 22 in the beam assembly 2. The rear panel joint body 1 includes a bottom plate 11 and a vertical plate 12 that are connected to each other. The vertical plate 12 is used to be connected to the web of the longitudinal beam 22, and the bottom plate 11 is used to be spaced apart from the cross beam 21. The vertical plate 12 is provided with a crush energy absorption hole 3 that partially extends to the bottom plate 11. When the cab is subjected to top pressure, the connection between the cross beam 21 and the longitudinal beam 22 bends and collapses under force to absorb the top pressure energy. Since the cab rear enclosure joint structure is provided with a crush energy absorbing hole 3, the structural strength is lower than the structural strength of other parts of the beam assembly 2. When the cab is subjected to top pressure, the cab rear enclosure joint structure is deformed at its installation location, crushed by force, and absorbs the top pressure energy. When crushed, the connection between the cross beam 21 and the longitudinal beam 22 bends, and the bottom plate 11 abuts against the cross beam 21 to further absorb the top pressure energy. This solves the problem in the prior art that the top pressure is directly transmitted from the beam, and the deformation area is often at the floor or the middle part, which can easily damage the occupant's living space, causing possible personal injury to the occupant and reducing safety.

[0034] In this case, according to the energy absorption principle, the amount of energy absorption area depends on the size of the crushed energy absorption area of ​​the part, and the amount of absorbed energy is related to the size of the energy absorption area and the constant force implemented under different working conditions. In theory, the larger the size, the better the energy absorption effect, but it needs to be confirmed based on the actual force conditions, and the survival space for personnel after the cab compression space is guaranteed plus 10% margin.

[0035] like Figure 1 and Figure 4 As shown, in some optional embodiments, first flanges 111 extending upward are provided at both ends of the bottom plate 11, and second flanges 121 extending toward the side close to the bottom plate 11 are provided on both sides of the vertical plate 12. The second flanges 121 are correspondingly connected to the first flanges 111, and the bottom plate 11, the first flange 111, the vertical plate 12 and the second flanges 121 form a crush energy absorption zone 4 located on both sides of the crush energy absorption hole 3.

[0036] In this embodiment, first flanges 111 extending upward are provided at both ends of the bottom plate 11, and second flanges 121 extending toward a side close to the bottom plate 11 are provided on both sides of the vertical plate 12, and the second flanges 121 are connected to the first flanges 111 accordingly. The bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 form a crush energy absorption zone 4 located on both sides of the crush energy absorption hole 3. The crush energy absorption zone 4 formed by the combination of the bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 further reduces the structural strength of the cab rear enclosure joint structure. The material thickness at the overlap between the second flange 121 and the first flange 111 is thicker than that of the surrounding structure, forming a force difference area with a strong top and a weak bottom, forming a weak position. When the cab is subjected to top pressure, deformation occurs at the installation position of the cab rear enclosure joint structure, guiding a specific part to be subjected to force and collapse, thereby absorbing the top pressure energy.

[0037] like Figure 1 and Figure 4 As shown, in some optional embodiments, the overlapping portion of the second flange 121 and the first flange 111 is used to connect to the wing plate of the longitudinal beam 22 , and the upper portion of the vertical plate 12 is used to connect to the web plate of the longitudinal beam 22 .

[0038] In this embodiment, the overlapping part of the second flange 121 and the first flange 111 is used to connect with the wing plate of the longitudinal beam 22, and the upper part of the vertical plate 12 is used to connect with the web of the longitudinal beam 22, so as to ensure the connection effect between the rear panel joint structure of the cab and the longitudinal beam 22, prevent the rear panel joint structure of the cab from being separated from the longitudinal beam 22 under the action of top pressure, and fail to play the role of crushing energy absorption. If the top pressure force is too large, it can also absorb a certain amount of energy when destroying the connection point between the rear panel joint structure of the cab and the longitudinal beam 22, thereby improving the safety of the cab occupants.

[0039] In this case, the connection form is welding. Welding can be used to make large or specific-sized structures by connecting small metal materials, thereby saving raw materials. The welding process can be mechanized and automated, simplifying the processing and assembly procedures and improving production efficiency. The joints formed by welding usually have higher strength and can withstand larger loads.

[0040] In this example, the bottom plate 11 is spaced apart from the cross beam 21 by a set distance to form an energy absorption zone 6 .

[0041] like Figure 1 and Figure 4 As shown, in some optional embodiments, the second flange 121 is located on the inner side of the first flange 111 , and the outer side of the first flange 111 is used to connect with the wing panel of the longitudinal beam 22 .

[0042] In this embodiment, the second flange 121 is located on the inner side of the first flange 111, and the outer side of the first flange 111 is used to connect with the wing of the longitudinal beam 22. If the top pressure force is too large, excessive deformation and collapse will occur, and it is necessary to destroy the connection between the first flange 111 and the wing of the longitudinal beam 22, and also to destroy the connection point between the first flange 111 and the second flange 121. If the second flange 121 is set on the outer side of the first flange 111, the second flange 121 is connected to the wing of the longitudinal beam 22, and the second flange 121 drives the first flange 111 to collapse together. The only main connection that is destroyed is the connection between the second flange 121 and the wing of the longitudinal beam 22. In comparison, setting the second flange 121 on the inner side of the first flange 111 has a better collapse energy absorption effect, which further improves the use effect and safety of the cab rear enclosure joint structure.

[0043] like Figure 1 As shown, in some optional embodiments, fillets 5 are provided at the connection points between the bottom plate 11 and the vertical plate 12 , between the bottom plate 11 and the first flange 111 , and between the vertical plate 12 and the second flange 121 .

[0044] In this embodiment, rounded corners 5 are provided at the connections between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121, so as to achieve a better transition effect. Compared with the right-angle connection, the rounded corner connection is more convenient for collapse and has higher stability, thereby preventing the connection relationship between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 from being destroyed during collapse, thereby preventing the situation where deformation and energy absorption cannot be performed.

[0045] In this example, the crush energy absorbing hole 3 partially extends to the bottom plate 11 and passes through the fillet 5 .

[0046] like Figure 1As shown, in some optional embodiments, the crush energy absorption zone 4 extends to the fillet 5 where the bottom plate 11 and the vertical plate 12 , the bottom plate 11 and the first flange 111 , and the vertical plate 12 and the second flange 121 are connected.

[0047] In this embodiment, the crush energy absorption zone 4 extends to the fillet 5 where the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 are connected, and the deformation effect is better, thereby improving the stability of the cab rear enclosure joint structure, making it difficult for the overall structure to break when the cab rear enclosure joint structure crushes and absorbs energy.

[0048] In some optional embodiments, the width of the crush energy absorbing hole 3 extending to the upper portion of the bottom plate 11 is less than or equal to one third of the width of the bottom plate 11 .

[0049] In this embodiment, the width of the crush energy absorption hole 3 extending to the upper part of the bottom plate 11 is less than or equal to one third of the width of the bottom plate 11, which not only meets the energy absorption requirements but also does not have a significant impact on the strength of the bottom plate 11, thereby improving the design effect of the rear enclosure joint structure of the cab.

[0050] In this example, the length of the crush energy absorption hole 3 extending to the upper part of the bottom plate 11 is less than or equal to one third of the length of the bottom plate 11, which not only meets the energy absorption requirements but also does not have a significant impact on the strength of the bottom plate 11, further improving the design effect of the cab rear enclosure joint structure.

[0051] In some optional embodiments, the spacing distance between the upper end of the crush energy absorbing hole 3 and the upper side of the vertical plate 12 is smaller than the width of the crush energy absorbing hole 3 .

[0052] In this embodiment, the spacing distance between the upper end of the crush energy absorbing hole 3 and the upper side of the vertical plate 12 is smaller than the width of the crush energy absorbing hole 3, which not only meets the energy absorption requirement, but also ensures the force distribution of compression and crushing, ensures the structural strength of the vertical plate 12, and improves the design effect of the cab rear enclosure joint structure.

[0053] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, on the one hand, the present application also provides a cab rear enclosure, which includes:

[0054] A beam assembly 2, comprising a cross beam 21 and a longitudinal beam 22 connected to the cross beam 21;

[0055] The rear enclosure joint body 1 is used to be arranged at the connection between the cross beam 21 and the longitudinal beam 22 in the beam assembly 2. The rear enclosure joint body 1 includes a bottom plate 11 and a vertical plate 12 which are connected to each other. The vertical plate 12 is used to be connected to the web of the longitudinal beam 22. The bottom plate 11 is used to be spaced apart from the cross beam 21. The vertical plate 12 is provided with a crush energy absorbing hole 3 which partially extends to the bottom plate 11. When the cab is subjected to top pressure, the connection between the cross beam 21 and the longitudinal beam 22 bends and is crushed under force to absorb the top pressure energy.

[0056] When the cab rear panel joint structure is used, the rear panel joint body 1 is arranged at the connection between the cross beam 21 and the longitudinal beam 22 in the beam assembly 2. The rear panel joint body 1 includes a bottom plate 11 and a vertical plate 12 that are connected to each other. The vertical plate 12 is used to be connected to the web of the longitudinal beam 22, and the bottom plate 11 is used to be spaced apart from the cross beam 21. The vertical plate 12 is provided with a crush energy absorption hole 3 that partially extends to the bottom plate 11. When the cab is subjected to top pressure, the connection between the cross beam 21 and the longitudinal beam 22 bends and collapses under force to absorb the top pressure energy. Since the cab rear enclosure joint structure is provided with a crush energy absorbing hole 3, the structural strength is lower than the structural strength of other parts of the beam assembly 2. When the cab is subjected to top pressure, the cab rear enclosure joint structure is deformed at its installation location, crushed by force, and absorbs the top pressure energy. When crushed, the connection between the cross beam 21 and the longitudinal beam 22 bends, and the bottom plate 11 abuts against the cross beam 21 to further absorb the top pressure energy. This solves the problem in the prior art that the top pressure is directly transmitted from the beam, and the deformation area is often at the floor or the middle part, which can easily damage the occupant's living space, causing possible personal injury to the occupant and reducing safety.

[0057] In this example, the cross beam 21 and the longitudinal beam 22 are connected by a connecting plate arranged on the back. When the cab is subjected to top pressure, the cab rear enclosure joint structure is deformed from the installation point, and collapses under force to absorb the top pressure energy. When collapsing, the connection between the cross beam 21 and the longitudinal beam 22 bends, and the bottom plate 11 abuts against the cross beam 21 to further absorb the top pressure energy.

[0058] In this embodiment, first flanges 111 extending upward are provided at both ends of the bottom plate 11, and second flanges 121 extending toward a side close to the bottom plate 11 are provided on both sides of the vertical plate 12, and the second flanges 121 are connected to the first flanges 111 accordingly. The bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 form a crush energy absorption zone 4 located on both sides of the crush energy absorption hole 3. The crush energy absorption zone 4 formed by the combination of the bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 further reduces the structural strength of the cab rear enclosure joint structure. The material thickness at the overlap between the second flange 121 and the first flange 111 is thicker than that of the surrounding structure, forming a force difference area with a strong top and a weak bottom, forming a weak position. When the cab is subjected to top pressure, deformation occurs at the installation position of the cab rear enclosure joint structure, guiding a specific part to be subjected to force and collapse, thereby absorbing the top pressure energy.

[0059] In this embodiment, the overlapping part of the second flange 121 and the first flange 111 is used to connect with the wing plate of the longitudinal beam 22, and the upper part of the vertical plate 12 is used to connect with the web of the longitudinal beam 22, so as to ensure the connection effect between the rear panel joint structure of the cab and the longitudinal beam 22, prevent the rear panel joint structure of the cab from being separated from the longitudinal beam 22 under the action of top pressure, and fail to play the role of crushing energy absorption. If the top pressure force is too large, it can also absorb a certain amount of energy when destroying the connection point between the rear panel joint structure of the cab and the longitudinal beam 22, thereby improving the safety of the cab occupants.

[0060] In this embodiment, the second flange 121 is located on the inner side of the first flange 111, and the outer side of the first flange 111 is used to connect with the wing of the longitudinal beam 22. If the top pressure force is too large, excessive deformation and collapse will occur, and it is necessary to destroy the connection between the first flange 111 and the wing of the longitudinal beam 22, and also to destroy the connection point between the first flange 111 and the second flange 121. If the second flange 121 is set on the outer side of the first flange 111, the second flange 121 is connected to the wing of the longitudinal beam 22, and the second flange 121 drives the first flange 111 to collapse together. The only main connection that is destroyed is the connection between the second flange 121 and the wing of the longitudinal beam 22. In comparison, setting the second flange 121 on the inner side of the first flange 111 has a better collapse energy absorption effect, which further improves the use effect and safety of the cab rear enclosure joint structure.

[0061] In this embodiment, rounded corners 5 are provided at the connections between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121, so as to achieve a better transition effect. Compared with the right-angle connection, the rounded corner connection is more convenient for collapse and has higher stability, thereby preventing the connection relationship between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 from being destroyed during collapse, thereby preventing the situation where deformation and energy absorption cannot be performed.

[0062] In this embodiment, the crush energy absorption zone 4 extends to the fillet 5 where the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 are connected, and the deformation effect is better, thereby improving the stability of the cab rear enclosure joint structure, making it difficult for the overall structure to break when the cab rear enclosure joint structure crushes and absorbs energy.

[0063] In this embodiment, the width of the crush energy absorption hole 3 extending to the upper part of the bottom plate 11 is less than or equal to one third of the width of the bottom plate 11, which not only meets the energy absorption requirements but also does not have a significant impact on the strength of the bottom plate 11, thereby improving the design effect of the rear enclosure joint structure of the cab.

[0064] In this embodiment, the spacing distance between the upper end of the crush energy absorbing hole 3 and the upper side of the vertical plate 12 is smaller than the width of the crush energy absorbing hole 3, which not only meets the energy absorption requirement, but also ensures the force distribution of compression and crushing, ensures the structural strength of the vertical plate 12, and improves the design effect of the cab rear enclosure joint structure.

[0065] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, on the other hand, the present application also provides a commercial vehicle, which includes the above-mentioned cab rear panel joint structure.

[0066] When the cab rear panel joint structure is used, the rear panel joint body 1 is arranged at the connection between the cross beam 21 and the longitudinal beam 22 in the beam assembly 2. The rear panel joint body 1 includes a bottom plate 11 and a vertical plate 12 that are connected to each other. The vertical plate 12 is used to be connected to the web of the longitudinal beam 22, and the bottom plate 11 is used to be spaced apart from the cross beam 21. The vertical plate 12 is provided with a crush energy absorption hole 3 that partially extends to the bottom plate 11. When the cab is subjected to top pressure, the connection between the cross beam 21 and the longitudinal beam 22 bends and collapses under force to absorb the top pressure energy. Since the cab rear enclosure joint structure is provided with a crush energy absorbing hole 3, the structural strength is lower than the structural strength of other parts of the beam assembly 2. When the cab is subjected to top pressure, the cab rear enclosure joint structure is deformed at its installation location, crushed by force, and absorbs the top pressure energy. When crushed, the connection between the cross beam 21 and the longitudinal beam 22 bends, and the bottom plate 11 abuts against the cross beam 21 to further absorb the top pressure energy. This solves the problem in the prior art that the top pressure is directly transmitted from the beam, and the deformation area is often at the floor or the middle part, which can easily damage the occupant's living space, causing possible personal injury to the occupant and reducing safety.

[0067] In this embodiment, first flanges 111 extending upward are provided at both ends of the bottom plate 11, and second flanges 121 extending toward a side close to the bottom plate 11 are provided on both sides of the vertical plate 12, and the second flanges 121 are connected to the first flanges 111 accordingly. The bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 form a crush energy absorption zone 4 located on both sides of the crush energy absorption hole 3. The crush energy absorption zone 4 formed by the combination of the bottom plate 11, the first flange 111, the vertical plate 12 and the second flange 121 further reduces the structural strength of the cab rear enclosure joint structure. The material thickness at the overlap between the second flange 121 and the first flange 111 is thicker than that of the surrounding structure, forming a force difference area with a strong top and a weak bottom, forming a weak position. When the cab is subjected to top pressure, deformation occurs at the installation position of the cab rear enclosure joint structure, guiding a specific part to be subjected to force and collapse, thereby absorbing the top pressure energy.

[0068] In this embodiment, the overlapping part of the second flange 121 and the first flange 111 is used to connect with the wing plate of the longitudinal beam 22, and the upper part of the vertical plate 12 is used to connect with the web of the longitudinal beam 22, so as to ensure the connection effect between the rear panel joint structure of the cab and the longitudinal beam 22, prevent the rear panel joint structure of the cab from being separated from the longitudinal beam 22 under the action of top pressure, and fail to play the role of crushing energy absorption. If the top pressure force is too large, it can also absorb a certain amount of energy when destroying the connection point between the rear panel joint structure of the cab and the longitudinal beam 22, thereby improving the safety of the cab occupants.

[0069] In this embodiment, the second flange 121 is located on the inner side of the first flange 111, and the outer side of the first flange 111 is used to connect with the wing of the longitudinal beam 22. If the top pressure force is too large, excessive deformation and collapse will occur, and it is necessary to destroy the connection between the first flange 111 and the wing of the longitudinal beam 22, and also to destroy the connection point between the first flange 111 and the second flange 121. If the second flange 121 is set on the outer side of the first flange 111, the second flange 121 is connected to the wing of the longitudinal beam 22, and the second flange 121 drives the first flange 111 to collapse together. The only main connection that is destroyed is the connection between the second flange 121 and the wing of the longitudinal beam 22. In comparison, setting the second flange 121 on the inner side of the first flange 111 has a better collapse energy absorption effect, which further improves the use effect and safety of the cab rear enclosure joint structure.

[0070] In this embodiment, rounded corners 5 are provided at the connections between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121, so as to achieve a better transition effect. Compared with the right-angle connection, the rounded corner connection is more convenient for collapse and has higher stability, thereby preventing the connection relationship between the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 from being destroyed during collapse, thereby preventing the situation where deformation and energy absorption cannot be performed.

[0071] In this embodiment, the crush energy absorption zone 4 extends to the fillet 5 where the bottom plate 11 and the vertical plate 12, the bottom plate 11 and the first flange 111, and the vertical plate 12 and the second flange 121 are connected, and the deformation effect is better, thereby improving the stability of the cab rear enclosure joint structure, making it difficult for the overall structure to break when the cab rear enclosure joint structure crushes and absorbs energy.

[0072] In this embodiment, the width of the crush energy absorption hole 3 extending to the upper part of the bottom plate 11 is less than or equal to one third of the width of the bottom plate 11, which not only meets the energy absorption requirements but also does not have a significant impact on the strength of the bottom plate 11, thereby improving the design effect of the rear enclosure joint structure of the cab.

[0073] In this embodiment, the spacing distance between the upper end of the crush energy absorbing hole 3 and the upper side of the vertical plate 12 is smaller than the width of the crush energy absorbing hole 3, which not only meets the energy absorption requirement, but also ensures the force distribution of compression and crushing, ensures the structural strength of the vertical plate 12, and improves the design effect of the cab rear enclosure joint structure.

[0074] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. 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 application can be understood according to the specific circumstances.

[0075] It should be noted that, in this application, 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 presence of other identical elements in the process, method, article or device including the elements.

[0076] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A cab rear enclosure joint structure, characterized in that: include: A rear enclosure joint body (1) is used to be arranged at the connection between a cross beam (21) and a longitudinal beam (22) in a beam assembly (2). The rear enclosure joint body (1) comprises a bottom plate (11) and a vertical plate (12) which are connected to each other. The vertical plate (12) is used to be connected to the web of the longitudinal beam (22). The bottom plate (11) is used to be spaced apart from the cross beam (21). The vertical plate (12) is provided with a crush energy absorbing hole (3) which partially extends to the bottom plate (11). When the cab is subjected to top pressure, the connection between the cross beam (21) and the longitudinal beam (22) bends and crushes under force to absorb the top pressure energy.

2. A cab rear panel joint structure as claimed in claim 1, characterized in that: The bottom plate (11) is provided with first flanges (111) extending upward at both ends, and the vertical plate (12) is provided with second flanges (121) extending toward a side close to the bottom plate (11) at both sides, and the second flanges (121) are connected to the first flanges (111) correspondingly, and the bottom plate (11), the first flanges (111), the vertical plate (12) and the second flanges (121) enclose a crush energy absorption zone (4) located on both sides of the crush energy absorption hole (3).

3. A cab rear wall joint structure as claimed in claim 2, characterized in that: The overlapping portion of the second flange (121) and the first flange (111) is used to connect to the wing plate of the longitudinal beam (22), and the upper portion of the vertical plate (12) is used to connect to the web plate of the longitudinal beam (22).

4. A cab rear wall joint structure as claimed in claim 3, characterized in that: The second flange (121) is located on the inner side of the first flange (111), and the outer side of the first flange (111) is used to be connected to the wing plate of the longitudinal beam (22).

5. The cab rear wall joint structure according to claim 2, characterized in that: Rounded corners (5) are provided at the connection points between the bottom plate (11) and the vertical plate (12), between the bottom plate (11) and the first flange (111), and between the vertical plate (12) and the second flange (121).

6. The cab rear wall joint structure according to claim 5, characterized in that: The crush energy absorption zone (4) extends to the fillet (5) where the bottom plate (11) and the vertical plate (12), the bottom plate (11) and the first flange (111), and the vertical plate (12) and the second flange (121) are connected.

7. The cab rear wall joint structure according to claim 1, characterized in that: The width of the collapse energy absorption hole (3) extending to the upper portion of the bottom plate (11) is less than or equal to one third of the width of the bottom plate (11).

8. The cab rear wall joint structure according to claim 1, characterized in that: The distance between the upper end of the collapse energy absorption hole (3) and the upper side of the vertical plate (12) is smaller than the width of the collapse energy absorption hole (3).

9. A cab rear enclosure, characterized in that: include: A beam assembly (2), comprising a cross beam (21) and a longitudinal beam (22) connected to the cross beam (21); A rear enclosure joint body (1) is used to be arranged at the connection between a cross beam (21) and a longitudinal beam (22) in a beam assembly (2). The rear enclosure joint body (1) comprises a bottom plate (11) and a vertical plate (12) which are connected to each other. The vertical plate (12) is used to be connected to the web of the longitudinal beam (22). The bottom plate (11) is used to be spaced apart from the cross beam (21). The vertical plate (12) is provided with a crush energy absorbing hole (3) which partially extends to the bottom plate (11). When the cab is subjected to top pressure, the connection between the cross beam (21) and the longitudinal beam (22) bends and crushes under force to absorb the top pressure energy.

10. A commercial vehicle, characterized in that: It comprises a cab rear panel joint structure as described in any one of claims 1 to 8.

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